initial import

44 files changed, 6480 insertions, 0 deletions

diff --git a/pppd_plugin/src/Makefile.am b/pppd_plugin/src/Makefile.am
new file mode 100644
index 0000000..6c4282c
--- /dev/null
+++ b/pppd_plugin/src/Makefile.am
@@ -0,0 +1,13 @@
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+pptp_la_SOURCES = pptp.c pptp_callmgr.c pptp_ctrl.c util.c vector.c \
+	dirutil.c pptp_quirks.c orckit_quirks.c
+noinst_HEADERS = pptp_callmgr.h pptp_ctrl.h util.h vector.h pptp_options.h \
+		dirutil.h pptp_quirks.h orckit_quirks.h if_pppox.h
+AM_CFLAGS = -Wall
+man_MANS = pppd-pptp.8
diff --git a/pppd_plugin/src/Makefile.in b/pppd_plugin/src/Makefile.in
new file mode 100644
index 0000000..79d6101
--- /dev/null
+++ b/pppd_plugin/src/Makefile.in
@@ -0,0 +1,528 @@
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+# This Makefile.in is free software; the Free Software Foundation
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+info-am:
+
+install-data-am: install-man
+
+install-exec-am: install-libLTLIBRARIES
+
+install-info: install-info-am
+
+install-man: install-man8
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-info-am uninstall-libLTLIBRARIES uninstall-man
+
+uninstall-man: uninstall-man8
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libLTLIBRARIES clean-libtool ctags distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-exec \
+	install-exec-am install-info install-info-am \
+	install-libLTLIBRARIES install-man install-man8 install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags uninstall uninstall-am uninstall-info-am \
+	uninstall-libLTLIBRARIES uninstall-man uninstall-man8
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/pppd_plugin/src/dirutil.c b/pppd_plugin/src/dirutil.c
new file mode 100644
index 0000000..e7b1a77
--- /dev/null
+++ b/pppd_plugin/src/dirutil.c
@@ -0,0 +1,68 @@
+/* dirutil.c ... directory utilities.
+ *               C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: dirutil.c,v 1.2 2003/06/17 17:25:47 reink Exp $
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "dirutil.h"
+
+/* Returned malloc'ed string representing basename */
+char *basenamex(char *pathname)
+{
+    char *dup = strdup(pathname);
+    char *ptr = strrchr(stripslash(dup), '/');
+    if (ptr == NULL) return dup;
+    ptr = strdup(ptr+1);
+    free(dup);
+    return ptr;
+}
+
+/* Return malloc'ed string representing directory name (no trailing slash) */
+char *dirnamex(char *pathname)
+{
+    char *dup = strdup(pathname);
+    char *ptr = strrchr(stripslash(dup), '/');
+    if (ptr == NULL) { free(dup); return strdup("."); }
+    if (ptr == dup && dup[0] == '/') ptr++;
+    *ptr = '\0';
+    return dup;
+}
+
+/* In-place modify a string to remove trailing slashes.  Returns arg.
+ * stripslash("/") returns "/";
+ */
+char *stripslash(char *pathname) {
+    int len = strlen(pathname);
+    while (len > 1 && pathname[len - 1] == '/')
+        pathname[--len] = '\0';
+    return pathname;
+}
+
+/* ensure dirname exists, creating it if necessary. */
+int make_valid_path(char *dir, mode_t mode)
+{
+    struct stat st;
+    char *tmp = NULL, *path = stripslash(strdup(dir));
+    int retval;
+    if (stat(path, &st) == 0) { /* file exists */
+        if (S_ISDIR(st.st_mode)) { retval = 1; goto end; }
+        else { retval = 0; goto end; } /* not a directory.  Oops. */
+    }
+    /* Directory doesn't exist.  Let's make it. */
+    /*   Make parent first. */
+    if (!make_valid_path(tmp = dirnamex(path), mode)) { retval = 0; goto end; }
+    /*   Now make this 'un. */
+    if (mkdir(path, mode) < 0) { retval = 0; goto end; }
+    /* Success. */
+    retval = 1;
+
+end:
+    if (tmp != NULL) free(tmp);
+    if (path != NULL) free(path);
+    return retval;
+}
diff --git a/pppd_plugin/src/dirutil.h b/pppd_plugin/src/dirutil.h
new file mode 100644
index 0000000..4c9aa87
--- /dev/null
+++ b/pppd_plugin/src/dirutil.h
@@ -0,0 +1,14 @@
+/* dirutil.h ... directory utilities.
+ *               C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: dirutil.h,v 1.1.1.1 2000/12/23 08:19:51 scott Exp $
+ */
+
+/* Returned malloc'ed string representing basename */
+char *basenamex(char *pathname);
+/* Return malloc'ed string representing directory name (no trailing slash) */
+char *dirnamex(char *pathname);
+/* In-place modify a string to remove trailing slashes.  Returns arg. */
+char *stripslash(char *pathname);
+/* ensure dirname exists, creating it if necessary. */
+int make_valid_path(char *dirname, mode_t mode);
diff --git a/pppd_plugin/src/if_pppox.h b/pppd_plugin/src/if_pppox.h
new file mode 120000
index 0000000..48a1663
--- /dev/null
+++ b/pppd_plugin/src/if_pppox.h
@@ -0,0 +1 @@
+../../kernel/driver/if_pppox.h
\ No newline at end of file
diff --git a/pppd_plugin/src/orckit_quirks.c b/pppd_plugin/src/orckit_quirks.c
new file mode 100644
index 0000000..1d03737
--- /dev/null
+++ b/pppd_plugin/src/orckit_quirks.c
@@ -0,0 +1,86 @@
+/* orckit_quirks.c ...... fix quirks in orckit adsl modems
+ *                        mulix <mulix@actcom.co.il>
+ *
+ * $Id: orckit_quirks.c,v 1.3 2002/03/01 01:23:36 quozl Exp $
+ */
+
+#include <string.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include "pptp_msg.h"
+#include "pptp_options.h"
+#include "pptp_ctrl.h"
+#include "util.h"
+
+
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_build_hook(struct pptp_out_call_rqst* packet)
+{
+    unsigned int name_length = 10;
+
+    struct pptp_out_call_rqst fixed_packet = {
+	PPTP_HEADER_CTRL(PPTP_OUT_CALL_RQST),
+	0, /* hton16(call->callid) */
+	0, /* hton16(call->sernum) */
+	hton32(PPTP_BPS_MIN), hton32(PPTP_BPS_MAX),
+	hton32(PPTP_BEARER_DIGITAL), hton32(PPTP_FRAME_ANY),
+	hton16(PPTP_WINDOW), 0, hton16(name_length), 0,
+	{'R','E','L','A','Y','_','P','P','P','1',0}, {0}
+    };
+
+    if (!packet)
+	return -1;
+
+    memcpy(packet, &fixed_packet, sizeof(*packet));
+
+    return 0;
+}
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_set_link_hook(struct pptp_set_link_info* packet,
+			   int peer_call_id)
+{
+    struct pptp_set_link_info fixed_packet = {
+	PPTP_HEADER_CTRL(PPTP_SET_LINK_INFO),
+	hton16(peer_call_id),
+	0,
+	0xffffffff,
+	0xffffffff};
+
+    if (!packet)
+	return -1;
+
+    memcpy(packet, &fixed_packet, sizeof(*packet));
+    return 0;
+}
+
+/* return 0 on success, non 0 otherwise */
+int
+orckit_atur3_start_ctrl_conn_hook(struct pptp_start_ctrl_conn* packet)
+{
+    struct pptp_start_ctrl_conn fixed_packet = {
+	{0}, /* we'll set the header later */
+	hton16(PPTP_VERSION), 0, 0,
+	hton32(PPTP_FRAME_ASYNC), hton32(PPTP_BEARER_ANALOG),
+	hton16(0) /* max channels */,
+	hton16(0x6021),
+	{'R','E','L','A','Y','_','P','P','P','1',0}, /* hostname */
+	{'M','S',' ','W','i','n',' ','N','T',0} /* vendor */
+    };
+
+    if (!packet)
+	return -1;
+
+    /* grab the header from the original packet, since we dont
+       know if this is a request or a reply */
+    memcpy(&fixed_packet.header, &packet->header, sizeof(struct pptp_header));
+
+    /* and now overwrite the full packet, effectively preserving the header */
+    memcpy(packet, &fixed_packet, sizeof(*packet));
+    return 0;
+}
+
+
diff --git a/pppd_plugin/src/orckit_quirks.h b/pppd_plugin/src/orckit_quirks.h
new file mode 100644
index 0000000..ad0193d
--- /dev/null
+++ b/pppd_plugin/src/orckit_quirks.h
@@ -0,0 +1,27 @@
+/* orckit_quirks.h ...... fix quirks in orckit adsl modems
+ *                        mulix <mulix@actcom.co.il>
+ *
+ * $Id: orckit_quirks.h,v 1.2 2001/11/23 03:42:51 quozl Exp $
+ */
+
+#ifndef INC_ORCKIT_QUIRKS_H_
+#define INC_ORCKIT_QUIRKS_H_
+
+#include "pptp_options.h"
+#include "pptp_ctrl.h"
+#include "pptp_msg.h"
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_build_hook(struct pptp_out_call_rqst* packt);
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_set_link_hook(struct pptp_set_link_info* packet,
+			   int peer_call_id);
+
+/* return 0 on success, non zero otherwise */
+int
+orckit_atur3_start_ctrl_conn_hook(struct pptp_start_ctrl_conn* packet);
+
+#endif /* INC_ORCKIT_QUIRKS_H_ */
diff --git a/pppd_plugin/src/pppd-pptp.8 b/pppd_plugin/src/pppd-pptp.8
new file mode 100644
index 0000000..85b31b2
--- /dev/null
+++ b/pppd_plugin/src/pppd-pptp.8
@@ -0,0 +1,71 @@
+.\" manual page [] for ACCEL-PPTP plugin for pppd 2.4
+.\" $Id: pppd-pptp.8,v 1.0 2007/10/17 13:27:17 kad Exp $
+.\" SH section heading
+.\" SS subsection heading
+.\" LP paragraph
+.\" IP indented paragraph
+.\" TP hanging label
+.TH PPPD-PPTP 8
+.SH NAME
+pptp.so \- PPTP VPN plugin for
+.BR pppd (8)
+.SH SYNOPSIS
+.B pppd
+[
+.I options
+]
+plugin pptp.so
+.SH DESCRIPTION
+.LP
+The PPTP plugin for pppd performs interaction with pptp kernel module
+and has built-in call manager (client part of PPTP).
+It pasees necessary paremeters from \fIoptions\fR into kernel module 
+to configure ppp-pptp channel. If it runs in client mode, then additionally 
+call manager starts up. PPTPD daemon automaticaly invokes this plugin
+in server mode and passes necessary options, so additional configuration
+is not needed.
+
+.SH OPTIONS for client mode
+The PPTP plugin introduces one additional pppd option:
+.TP
+.BI "pptp_server " server " (required)"
+Specifies ip address or hostname of pptp server.
+.TP
+.BI "pptp_window " packets " (optional)"
+The amount of sliding window size. 
+Set to 0 to turn off sliding window.
+    to 3-10 for low speed connections.
+    to >10 for hi speed connections.
+.TP
+.BI "pptp_phone " phone " (optional)"
+The phone string that sended to pptp server.
+.TP
+.BI "pptp_timeout " miliseconds " (optional)"
+Specifies timeout for waiting "ack" packet from server.
+
+.SH USAGE
+Sample configuration file:
+.nf
+plugin "pptp.so"
+pptp_server 192.168.0.1
+pptp_window 50
+name myname
+remotename pptp
+noauth
+refuse-eap
+refuse-chap
+refuse-mschap
+nobsdcomp
+nodeflate
+novj
+novjccomp
+require-mppe-128
+lcp-echo-interval 20
+lcp-echo-failure  3
+.fi
+
+.SH SEE ALSO
+.BR pppd (8) "  " pptpd (8) "  " pptpd.conf (5)
+
+.SH AUTHOR
+xeb xeb@mail.ru
diff --git a/pppd_plugin/src/pppd/cbcp.h b/pppd_plugin/src/pppd/cbcp.h
new file mode 100644
index 0000000..c2ab3f6
--- /dev/null
+++ b/pppd_plugin/src/pppd/cbcp.h
@@ -0,0 +1,26 @@
+#ifndef CBCP_H
+#define CBCP_H
+
+typedef struct cbcp_state {
+    int    us_unit;	/* Interface unit number */
+    u_char us_id;		/* Current id */
+    u_char us_allowed;
+    int    us_type;
+    char   *us_number;    /* Telefone Number */
+} cbcp_state;
+
+extern cbcp_state cbcp[];
+
+extern struct protent cbcp_protent;
+
+#define CBCP_MINLEN 4
+
+#define CBCP_REQ    1
+#define CBCP_RESP   2
+#define CBCP_ACK    3
+
+#define CB_CONF_NO     1
+#define CB_CONF_USER   2
+#define CB_CONF_ADMIN  3
+#define CB_CONF_LIST   4
+#endif
diff --git a/pppd_plugin/src/pppd/ccp.h b/pppd_plugin/src/pppd/ccp.h
new file mode 100644
index 0000000..6f4a2fe
--- /dev/null
+++ b/pppd_plugin/src/pppd/ccp.h
@@ -0,0 +1,52 @@
+/*
+ * ccp.h - Definitions for PPP Compression Control Protocol.
+ *
+ * Copyright (c) 1994-2002 Paul Mackerras. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * 3. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Paul Mackerras
+ *     <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: ccp.h,v 1.12 2004/11/04 10:02:26 paulus Exp $
+ */
+
+typedef struct ccp_options {
+    bool bsd_compress;		/* do BSD Compress? */
+    bool deflate;		/* do Deflate? */
+    bool predictor_1;		/* do Predictor-1? */
+    bool predictor_2;		/* do Predictor-2? */
+    bool deflate_correct;	/* use correct code for deflate? */
+    bool deflate_draft;		/* use draft RFC code for deflate? */
+    bool mppe;			/* do MPPE? */
+    u_short bsd_bits;		/* # bits/code for BSD Compress */
+    u_short deflate_size;	/* lg(window size) for Deflate */
+    short method;		/* code for chosen compression method */
+} ccp_options;
+
+extern fsm ccp_fsm[];
+extern ccp_options ccp_wantoptions[];
+extern ccp_options ccp_gotoptions[];
+extern ccp_options ccp_allowoptions[];
+extern ccp_options ccp_hisoptions[];
+
+extern struct protent ccp_protent;
diff --git a/pppd_plugin/src/pppd/chap-md5.h b/pppd_plugin/src/pppd/chap-md5.h
new file mode 100644
index 0000000..30d0658
--- /dev/null
+++ b/pppd_plugin/src/pppd/chap-md5.h
@@ -0,0 +1,31 @@
+/*
+ * chap-md5.h - New CHAP/MD5 implementation.
+ *
+ * Copyright (c) 2003 Paul Mackerras. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * 3. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Paul Mackerras
+ *     <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+extern void chap_md5_init(void);
diff --git a/pppd_plugin/src/pppd/chap-new.h b/pppd_plugin/src/pppd/chap-new.h
new file mode 100644
index 0000000..48235d4
--- /dev/null
+++ b/pppd_plugin/src/pppd/chap-new.h
@@ -0,0 +1,130 @@
+/*
+ * chap-new.c - New CHAP implementation.
+ *
+ * Copyright (c) 2003 Paul Mackerras. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * 3. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Paul Mackerras
+ *     <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * CHAP packets begin with a standard header with code, id, len (2 bytes).
+ */
+#define CHAP_HDRLEN	4
+
+/*
+ * Values for the code field.
+ */
+#define CHAP_CHALLENGE	1
+#define CHAP_RESPONSE	2
+#define CHAP_SUCCESS	3
+#define CHAP_FAILURE	4
+
+/*
+ * CHAP digest codes.
+ */
+#define CHAP_MD5		5
+#define CHAP_MICROSOFT		0x80
+#define CHAP_MICROSOFT_V2	0x81
+
+/*
+ * Semi-arbitrary limits on challenge and response fields.
+ */
+#define MAX_CHALLENGE_LEN	64
+#define MAX_RESPONSE_LEN	64
+
+/* bitmask of supported algorithms */
+#define MDTYPE_MICROSOFT_V2	0x1
+#define MDTYPE_MICROSOFT	0x2
+#define MDTYPE_MD5		0x4
+#define MDTYPE_NONE		0
+
+/* hashes supported by this instance of pppd */
+extern int chap_mdtype_all;
+
+/* Return the digest alg. ID for the most preferred digest type. */
+#define CHAP_DIGEST(mdtype) \
+    ((mdtype) & MDTYPE_MD5)? CHAP_MD5: \
+    ((mdtype) & MDTYPE_MICROSOFT_V2)? CHAP_MICROSOFT_V2: \
+    ((mdtype) & MDTYPE_MICROSOFT)? CHAP_MICROSOFT: \
+    0
+
+/* Return the bit flag (lsb set) for our most preferred digest type. */
+#define CHAP_MDTYPE(mdtype) ((mdtype) ^ ((mdtype) - 1)) & (mdtype)
+
+/* Return the bit flag for a given digest algorithm ID. */
+#define CHAP_MDTYPE_D(digest) \
+    ((digest) == CHAP_MICROSOFT_V2)? MDTYPE_MICROSOFT_V2: \
+    ((digest) == CHAP_MICROSOFT)? MDTYPE_MICROSOFT: \
+    ((digest) == CHAP_MD5)? MDTYPE_MD5: \
+    0
+
+/* Can we do the requested digest? */
+#define CHAP_CANDIGEST(mdtype, digest) \
+    ((digest) == CHAP_MICROSOFT_V2)? (mdtype) & MDTYPE_MICROSOFT_V2: \
+    ((digest) == CHAP_MICROSOFT)? (mdtype) & MDTYPE_MICROSOFT: \
+    ((digest) == CHAP_MD5)? (mdtype) & MDTYPE_MD5: \
+    0
+
+/*
+ * The code for each digest type has to supply one of these.
+ */
+struct chap_digest_type {
+	int code;
+
+	/*
+	 * Note: challenge and response arguments below are formatted as
+	 * a length byte followed by the actual challenge/response data.
+	 */
+	void (*generate_challenge)(unsigned char *challenge);
+	int (*verify_response)(int id, char *name,
+		unsigned char *secret, int secret_len,
+		unsigned char *challenge, unsigned char *response,
+		char *message, int message_space);
+	void (*make_response)(unsigned char *response, int id, char *our_name,
+		unsigned char *challenge, char *secret, int secret_len,
+		unsigned char *priv);
+	int (*check_success)(unsigned char *pkt, int len, unsigned char *priv);
+	void (*handle_failure)(unsigned char *pkt, int len);
+
+	struct chap_digest_type *next;
+};
+
+/* Hook for a plugin to validate CHAP challenge */
+extern int (*chap_verify_hook)(char *name, char *ourname, int id,
+			struct chap_digest_type *digest,
+			unsigned char *challenge, unsigned char *response,
+			char *message, int message_space);
+
+/* Called by digest code to register a digest type */
+extern void chap_register_digest(struct chap_digest_type *);
+
+/* Called by authentication code to start authenticating the peer. */
+extern void chap_auth_peer(int unit, char *our_name, int digest_code);
+
+/* Called by auth. code to start authenticating us to the peer. */
+extern void chap_auth_with_peer(int unit, char *our_name, int digest_code);
+
+/* Represents the CHAP protocol to the main pppd code */
+extern struct protent chap_protent;
diff --git a/pppd_plugin/src/pppd/chap_ms.h b/pppd_plugin/src/pppd/chap_ms.h
new file mode 100644
index 0000000..168c0be
--- /dev/null
+++ b/pppd_plugin/src/pppd/chap_ms.h
@@ -0,0 +1,122 @@
+/*
+ * chap_ms.h - Challenge Handshake Authentication Protocol definitions.
+ *
+ * Copyright (c) 1995 Eric Rosenquist.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: chap_ms.h,v 1.12 2004/11/09 22:49:05 paulus Exp $
+ */
+
+#ifndef __CHAPMS_INCLUDE__
+
+#define MD4_SIGNATURE_SIZE	16	/* 16 bytes in a MD4 message digest */
+#define MAX_NT_PASSWORD		256	/* Max (Unicode) chars in an NT pass */
+
+#define MS_CHAP_RESPONSE_LEN	49	/* Response length for MS-CHAP */
+#define MS_CHAP2_RESPONSE_LEN	49	/* Response length for MS-CHAPv2 */
+#define MS_AUTH_RESPONSE_LENGTH	40	/* MS-CHAPv2 authenticator response, */
+					/* as ASCII */
+
+/* E=eeeeeeeeee error codes for MS-CHAP failure messages. */
+#define MS_CHAP_ERROR_RESTRICTED_LOGON_HOURS	646
+#define MS_CHAP_ERROR_ACCT_DISABLED		647
+#define MS_CHAP_ERROR_PASSWD_EXPIRED		648
+#define MS_CHAP_ERROR_NO_DIALIN_PERMISSION	649
+#define MS_CHAP_ERROR_AUTHENTICATION_FAILURE	691
+#define MS_CHAP_ERROR_CHANGING_PASSWORD		709
+
+/*
+ * Apparently gcc on ARM gives all structures 4-byte alignment
+ * by default.  This tells gcc that these structures may be
+ * unaligned and may not have extra padding inside them.
+ */
+#ifdef __GNUC__
+#define PACKED	__attribute__((__packed__))
+#else
+#define PACKED
+#endif
+
+/*
+ * Use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
+ * in case this struct gets padded.
+ */
+typedef struct {
+    u_char LANManResp[24];
+    u_char NTResp[24];
+    u_char UseNT[1];		/* If 1, ignore the LANMan response field */
+} MS_ChapResponse PACKED;
+
+/*
+ * Use MS_CHAP2_RESPONSE_LEN, rather than sizeof(MS_Chap2Response),
+ * in case this struct gets padded.
+ */
+typedef struct {
+    u_char PeerChallenge[16];
+    u_char Reserved[8];		/* Must be zero */
+    u_char NTResp[24];
+    u_char Flags[1];		/* Must be zero */
+} MS_Chap2Response PACKED;
+
+#ifdef MPPE
+#include <net/ppp-comp.h>	/* MPPE_MAX_KEY_LEN */
+extern u_char mppe_send_key[MPPE_MAX_KEY_LEN];
+extern u_char mppe_recv_key[MPPE_MAX_KEY_LEN];
+extern int mppe_keys_set;
+
+/* These values are the RADIUS attribute values--see RFC 2548. */
+#define MPPE_ENC_POL_ENC_ALLOWED 1
+#define MPPE_ENC_POL_ENC_REQUIRED 2
+#define MPPE_ENC_TYPES_RC4_40 2
+#define MPPE_ENC_TYPES_RC4_128 4
+
+/* used by plugins (using above values) */
+extern void set_mppe_enc_types(int, int);
+#endif
+
+/* Are we the authenticator or authenticatee?  For MS-CHAPv2 key derivation. */
+#define MS_CHAP2_AUTHENTICATEE 0
+#define MS_CHAP2_AUTHENTICATOR 1
+
+void ChapMS __P((u_char *, char *, int, MS_ChapResponse *));
+void ChapMS2 __P((u_char *, u_char *, char *, char *, int,
+		  MS_Chap2Response *, u_char[MS_AUTH_RESPONSE_LENGTH+1], int));
+#ifdef MPPE
+void mppe_set_keys __P((u_char *, u_char[MD4_SIGNATURE_SIZE]));
+void mppe_set_keys2(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
+		    u_char NTResponse[24], int IsServer);
+#endif
+
+void	ChallengeHash __P((u_char[16], u_char *, char *, u_char[8]));
+
+void GenerateAuthenticatorResponse(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
+			u_char NTResponse[24], u_char PeerChallenge[16],
+			u_char *rchallenge, char *username,
+			u_char authResponse[MS_AUTH_RESPONSE_LENGTH+1]);
+
+void chapms_init(void);
+
+#define __CHAPMS_INCLUDE__
+#endif /* __CHAPMS_INCLUDE__ */
diff --git a/pppd_plugin/src/pppd/eap.h b/pppd_plugin/src/pppd/eap.h
new file mode 100644
index 0000000..199d184
--- /dev/null
+++ b/pppd_plugin/src/pppd/eap.h
@@ -0,0 +1,158 @@
+/*
+ * eap.h - Extensible Authentication Protocol for PPP (RFC 2284)
+ *
+ * Copyright (c) 2001 by Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * Non-exclusive rights to redistribute, modify, translate, and use
+ * this software in source and binary forms, in whole or in part, is
+ * hereby granted, provided that the above copyright notice is
+ * duplicated in any source form, and that neither the name of the
+ * copyright holder nor the author is used to endorse or promote
+ * products derived from this software.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Original version by James Carlson
+ *
+ * $Id: eap.h,v 1.2 2003/06/11 23:56:26 paulus Exp $
+ */
+
+#ifndef PPP_EAP_H
+#define	PPP_EAP_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Packet header = Code, id, length.
+ */
+#define	EAP_HEADERLEN	4
+
+
+/* EAP message codes. */
+#define	EAP_REQUEST	1
+#define	EAP_RESPONSE	2
+#define	EAP_SUCCESS	3
+#define	EAP_FAILURE	4
+
+/* EAP types */
+#define	EAPT_IDENTITY		1
+#define	EAPT_NOTIFICATION	2
+#define	EAPT_NAK		3	/* (response only) */
+#define	EAPT_MD5CHAP		4
+#define	EAPT_OTP		5	/* One-Time Password; RFC 1938 */
+#define	EAPT_TOKEN		6	/* Generic Token Card */
+/* 7 and 8 are unassigned. */
+#define	EAPT_RSA		9	/* RSA Public Key Authentication */
+#define	EAPT_DSS		10	/* DSS Unilateral */
+#define	EAPT_KEA		11	/* KEA */
+#define	EAPT_KEA_VALIDATE	12	/* KEA-VALIDATE	*/
+#define	EAPT_TLS		13	/* EAP-TLS */
+#define	EAPT_DEFENDER		14	/* Defender Token (AXENT) */
+#define	EAPT_W2K		15	/* Windows 2000 EAP */
+#define	EAPT_ARCOT		16	/* Arcot Systems */
+#define	EAPT_CISCOWIRELESS	17	/* Cisco Wireless */
+#define	EAPT_NOKIACARD		18	/* Nokia IP smart card */
+#define	EAPT_SRP		19	/* Secure Remote Password */
+/* 20 is deprecated */
+
+/* EAP SRP-SHA1 Subtypes */
+#define	EAPSRP_CHALLENGE	1	/* Request 1 - Challenge */
+#define	EAPSRP_CKEY		1	/* Response 1 - Client Key */
+#define	EAPSRP_SKEY		2	/* Request 2 - Server Key */
+#define	EAPSRP_CVALIDATOR	2	/* Response 2 - Client Validator */
+#define	EAPSRP_SVALIDATOR	3	/* Request 3 - Server Validator */
+#define	EAPSRP_ACK		3	/* Response 3 - final ack */
+#define	EAPSRP_LWRECHALLENGE	4	/* Req/resp 4 - Lightweight rechal */
+
+#define	SRPVAL_EBIT	0x00000001	/* Use shared key for ECP */
+
+#define	SRP_PSEUDO_ID	"pseudo_"
+#define	SRP_PSEUDO_LEN	7
+
+#define MD5_SIGNATURE_SIZE	16
+#define MIN_CHALLENGE_LENGTH	16
+#define MAX_CHALLENGE_LENGTH	24
+
+enum eap_state_code {
+	eapInitial = 0,	/* No EAP authentication yet requested */
+	eapPending,	/* Waiting for LCP (no timer) */
+	eapClosed,	/* Authentication not in use */
+	eapListen,	/* Client ready (and timer running) */
+	eapIdentify,	/* EAP Identify sent */
+	eapSRP1,	/* Sent EAP SRP-SHA1 Subtype 1 */
+	eapSRP2,	/* Sent EAP SRP-SHA1 Subtype 2 */
+	eapSRP3,	/* Sent EAP SRP-SHA1 Subtype 3 */
+	eapMD5Chall,	/* Sent MD5-Challenge */
+	eapOpen,	/* Completed authentication */
+	eapSRP4,	/* Sent EAP SRP-SHA1 Subtype 4 */
+	eapBadAuth	/* Failed authentication */
+};
+
+#define	EAP_STATES	\
+	"Initial", "Pending", "Closed", "Listen", "Identify", \
+	"SRP1", "SRP2", "SRP3", "MD5Chall", "Open", "SRP4", "BadAuth"
+
+#define	eap_client_active(esp)	((esp)->es_client.ea_state == eapListen)
+#define	eap_server_active(esp)	\
+	((esp)->es_server.ea_state >= eapIdentify && \
+	 (esp)->es_server.ea_state <= eapMD5Chall)
+
+struct eap_auth {
+	char *ea_name;		/* Our name */
+	char *ea_peer;		/* Peer's name */
+	void *ea_session;	/* Authentication library linkage */
+	u_char *ea_skey;	/* Shared encryption key */
+	int ea_timeout;		/* Time to wait (for retransmit/fail) */
+	int ea_maxrequests;	/* Max Requests allowed */
+	u_short ea_namelen;	/* Length of our name */
+	u_short ea_peerlen;	/* Length of peer's name */
+	enum eap_state_code ea_state;
+	u_char ea_id;		/* Current id */
+	u_char ea_requests;	/* Number of Requests sent/received */
+	u_char ea_responses;	/* Number of Responses */
+	u_char ea_type;		/* One of EAPT_* */
+	u_int32_t ea_keyflags;	/* SRP shared key usage flags */
+};
+
+/*
+ * Complete EAP state for one PPP session.
+ */
+typedef struct eap_state {
+	int es_unit;			/* Interface unit number */
+	struct eap_auth es_client;	/* Client (authenticatee) data */
+	struct eap_auth es_server;	/* Server (authenticator) data */
+	int es_savedtime;		/* Saved timeout */
+	int es_rechallenge;		/* EAP rechallenge interval */
+	int es_lwrechallenge;		/* SRP lightweight rechallenge inter */
+	bool es_usepseudo;		/* Use SRP Pseudonym if offered one */
+	int es_usedpseudo;		/* Set if we already sent PN */
+	int es_challen;			/* Length of challenge string */
+	u_char es_challenge[MAX_CHALLENGE_LENGTH];
+} eap_state;
+
+/*
+ * Timeouts.
+ */
+#define	EAP_DEFTIMEOUT		3	/* Timeout (seconds) for rexmit */
+#define	EAP_DEFTRANSMITS	10	/* max # times to transmit */
+#define	EAP_DEFREQTIME		20	/* Time to wait for peer request */
+#define	EAP_DEFALLOWREQ		20	/* max # times to accept requests */
+
+extern eap_state eap_states[];
+
+void eap_authwithpeer __P((int unit, char *localname));
+void eap_authpeer __P((int unit, char *localname));
+
+extern struct protent eap_protent;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* PPP_EAP_H */
+
diff --git a/pppd_plugin/src/pppd/ecp.h b/pppd_plugin/src/pppd/ecp.h
new file mode 100644
index 0000000..df6e3ca
--- /dev/null
+++ b/pppd_plugin/src/pppd/ecp.h
@@ -0,0 +1,45 @@
+/*
+ * ecp.h - Definitions for PPP Encryption Control Protocol.
+ *
+ * Copyright (c) 2002 Google, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: ecp.h,v 1.2 2003/01/10 07:12:36 fcusack Exp $
+ */
+
+typedef struct ecp_options {
+    bool required;		/* Is ECP required? */
+    unsigned enctype;		/* Encryption type */
+} ecp_options;
+
+extern fsm ecp_fsm[];
+extern ecp_options ecp_wantoptions[];
+extern ecp_options ecp_gotoptions[];
+extern ecp_options ecp_allowoptions[];
+extern ecp_options ecp_hisoptions[];
+
+extern struct protent ecp_protent;
diff --git a/pppd_plugin/src/pppd/eui64.h b/pppd_plugin/src/pppd/eui64.h
new file mode 100644
index 0000000..0f6b6fd
--- /dev/null
+++ b/pppd_plugin/src/pppd/eui64.h
@@ -0,0 +1,114 @@
+/*
+ * eui64.h - EUI64 routines for IPv6CP.
+ *
+ * Copyright (c) 1999 Tommi Komulainen.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Tommi Komulainen
+ *     <Tommi.Komulainen@iki.fi>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: eui64.h,v 1.6 2002/12/04 23:03:32 paulus Exp $
+*/
+
+#ifndef __EUI64_H__
+#define __EUI64_H__
+
+#if !defined(INET6)
+#error	"this file should only be included when INET6 is defined"
+#endif /* not defined(INET6) */
+
+#if defined(SOL2)
+#include <netinet/in.h>
+
+typedef union {
+    uint8_t	e8[8];		/* lower 64-bit IPv6 address */
+    uint32_t	e32[2];		/* lower 64-bit IPv6 address */
+} eui64_t;
+
+/*
+ * Declare the two below, since in.h only defines them when _KERNEL
+ * is declared - which shouldn't be true when dealing with user-land programs
+ */
+#define	s6_addr8	_S6_un._S6_u8
+#define	s6_addr32	_S6_un._S6_u32
+
+#else /* else if not defined(SOL2) */
+
+/*
+ * TODO:
+ *
+ * Maybe this should be done by processing struct in6_addr directly...
+ */
+typedef union
+{
+    u_int8_t e8[8];
+    u_int16_t e16[4];
+    u_int32_t e32[2];
+} eui64_t;
+
+#endif /* defined(SOL2) */
+
+#define eui64_iszero(e)		(((e).e32[0] | (e).e32[1]) == 0)
+#define eui64_equals(e, o)	(((e).e32[0] == (o).e32[0]) && \
+				((e).e32[1] == (o).e32[1]))
+#define eui64_zero(e)		(e).e32[0] = (e).e32[1] = 0;
+
+#define eui64_copy(s, d)	memcpy(&(d), &(s), sizeof(eui64_t))
+
+#define eui64_magic(e)		do {			\
+				(e).e32[0] = magic();	\
+				(e).e32[1] = magic();	\
+				(e).e8[0] &= ~2;	\
+				} while (0)
+#define eui64_magic_nz(x)	do {				\
+				eui64_magic(x);			\
+				} while (eui64_iszero(x))
+#define eui64_magic_ne(x, y)	do {				\
+				eui64_magic(x);			\
+				} while (eui64_equals(x, y))
+
+#define eui64_get(ll, cp)	do {				\
+				eui64_copy((*cp), (ll));	\
+				(cp) += sizeof(eui64_t);	\
+				} while (0)
+
+#define eui64_put(ll, cp)	do {				\
+				eui64_copy((ll), (*cp));	\
+				(cp) += sizeof(eui64_t);	\
+				} while (0)
+
+#define eui64_set32(e, l)	do {			\
+				(e).e32[0] = 0;		\
+				(e).e32[1] = htonl(l);	\
+				} while (0)
+#define eui64_setlo32(e, l)	eui64_set32(e, l)
+
+char *eui64_ntoa __P((eui64_t));	/* Returns ascii representation of id */
+
+#endif /* __EUI64_H__ */
+
diff --git a/pppd_plugin/src/pppd/fsm.h b/pppd_plugin/src/pppd/fsm.h
new file mode 100644
index 0000000..87a78d3
--- /dev/null
+++ b/pppd_plugin/src/pppd/fsm.h
@@ -0,0 +1,168 @@
+/*
+ * fsm.h - {Link, IP} Control Protocol Finite State Machine definitions.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: fsm.h,v 1.10 2004/11/13 02:28:15 paulus Exp $
+ */
+
+/*
+ * Packet header = Code, id, length.
+ */
+#define HEADERLEN	4
+
+
+/*
+ *  CP (LCP, IPCP, etc.) codes.
+ */
+#define CONFREQ		1	/* Configuration Request */
+#define CONFACK		2	/* Configuration Ack */
+#define CONFNAK		3	/* Configuration Nak */
+#define CONFREJ		4	/* Configuration Reject */
+#define TERMREQ		5	/* Termination Request */
+#define TERMACK		6	/* Termination Ack */
+#define CODEREJ		7	/* Code Reject */
+
+
+/*
+ * Each FSM is described by an fsm structure and fsm callbacks.
+ */
+typedef struct fsm {
+    int unit;			/* Interface unit number */
+    int protocol;		/* Data Link Layer Protocol field value */
+    int state;			/* State */
+    int flags;			/* Contains option bits */
+    u_char id;			/* Current id */
+    u_char reqid;		/* Current request id */
+    u_char seen_ack;		/* Have received valid Ack/Nak/Rej to Req */
+    int timeouttime;		/* Timeout time in milliseconds */
+    int maxconfreqtransmits;	/* Maximum Configure-Request transmissions */
+    int retransmits;		/* Number of retransmissions left */
+    int maxtermtransmits;	/* Maximum Terminate-Request transmissions */
+    int nakloops;		/* Number of nak loops since last ack */
+    int rnakloops;		/* Number of naks received */
+    int maxnakloops;		/* Maximum number of nak loops tolerated */
+    struct fsm_callbacks *callbacks;	/* Callback routines */
+    char *term_reason;		/* Reason for closing protocol */
+    int term_reason_len;	/* Length of term_reason */
+} fsm;
+
+
+typedef struct fsm_callbacks {
+    void (*resetci)		/* Reset our Configuration Information */
+		__P((fsm *));
+    int  (*cilen)		/* Length of our Configuration Information */
+		__P((fsm *));
+    void (*addci) 		/* Add our Configuration Information */
+		__P((fsm *, u_char *, int *));
+    int  (*ackci)		/* ACK our Configuration Information */
+		__P((fsm *, u_char *, int));
+    int  (*nakci)		/* NAK our Configuration Information */
+		__P((fsm *, u_char *, int, int));
+    int  (*rejci)		/* Reject our Configuration Information */
+		__P((fsm *, u_char *, int));
+    int  (*reqci)		/* Request peer's Configuration Information */
+		__P((fsm *, u_char *, int *, int));
+    void (*up)			/* Called when fsm reaches OPENED state */
+		__P((fsm *));
+    void (*down)		/* Called when fsm leaves OPENED state */
+		__P((fsm *));
+    void (*starting)		/* Called when we want the lower layer */
+		__P((fsm *));
+    void (*finished)		/* Called when we don't want the lower layer */
+		__P((fsm *));
+    void (*protreject)		/* Called when Protocol-Reject received */
+		__P((int));
+    void (*retransmit)		/* Retransmission is necessary */
+		__P((fsm *));
+    int  (*extcode)		/* Called when unknown code received */
+		__P((fsm *, int, int, u_char *, int));
+    char *proto_name;		/* String name for protocol (for messages) */
+} fsm_callbacks;
+
+
+/*
+ * Link states.
+ */
+#define INITIAL		0	/* Down, hasn't been opened */
+#define STARTING	1	/* Down, been opened */
+#define CLOSED		2	/* Up, hasn't been opened */
+#define STOPPED		3	/* Open, waiting for down event */
+#define CLOSING		4	/* Terminating the connection, not open */
+#define STOPPING	5	/* Terminating, but open */
+#define REQSENT		6	/* We've sent a Config Request */
+#define ACKRCVD		7	/* We've received a Config Ack */
+#define ACKSENT		8	/* We've sent a Config Ack */
+#define OPENED		9	/* Connection available */
+
+
+/*
+ * Flags - indicate options controlling FSM operation
+ */
+#define OPT_PASSIVE	1	/* Don't die if we don't get a response */
+#define OPT_RESTART	2	/* Treat 2nd OPEN as DOWN, UP */
+#define OPT_SILENT	4	/* Wait for peer to speak first */
+
+
+/*
+ * Timeouts.
+ */
+#define DEFTIMEOUT	3	/* Timeout time in seconds */
+#define DEFMAXTERMREQS	2	/* Maximum Terminate-Request transmissions */
+#define DEFMAXCONFREQS	10	/* Maximum Configure-Request transmissions */
+#define DEFMAXNAKLOOPS	5	/* Maximum number of nak loops */
+
+
+/*
+ * Prototypes
+ */
+void fsm_init __P((fsm *));
+void fsm_lowerup __P((fsm *));
+void fsm_lowerdown __P((fsm *));
+void fsm_open __P((fsm *));
+void fsm_close __P((fsm *, char *));
+void fsm_input __P((fsm *, u_char *, int));
+void fsm_protreject __P((fsm *));
+void fsm_sdata __P((fsm *, int, int, u_char *, int));
+
+
+/*
+ * Variables
+ */
+extern int peer_mru[];		/* currently negotiated peer MRU (per unit) */
diff --git a/pppd_plugin/src/pppd/ipcp.h b/pppd_plugin/src/pppd/ipcp.h
new file mode 100644
index 0000000..6cf14c9
--- /dev/null
+++ b/pppd_plugin/src/pppd/ipcp.h
@@ -0,0 +1,96 @@
+/*
+ * ipcp.h - IP Control Protocol definitions.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: ipcp.h,v 1.14 2002/12/04 23:03:32 paulus Exp $
+ */
+
+/*
+ * Options.
+ */
+#define CI_ADDRS	1	/* IP Addresses */
+#define CI_COMPRESSTYPE	2	/* Compression Type */
+#define	CI_ADDR		3
+
+#define CI_MS_DNS1	129	/* Primary DNS value */
+#define CI_MS_WINS1	130	/* Primary WINS value */
+#define CI_MS_DNS2	131	/* Secondary DNS value */
+#define CI_MS_WINS2	132	/* Secondary WINS value */
+
+#define MAX_STATES 16		/* from slcompress.h */
+
+#define IPCP_VJMODE_OLD 1	/* "old" mode (option # = 0x0037) */
+#define IPCP_VJMODE_RFC1172 2	/* "old-rfc"mode (option # = 0x002d) */
+#define IPCP_VJMODE_RFC1332 3	/* "new-rfc"mode (option # = 0x002d, */
+                                /*  maxslot and slot number compression) */
+
+#define IPCP_VJ_COMP 0x002d	/* current value for VJ compression option*/
+#define IPCP_VJ_COMP_OLD 0x0037	/* "old" (i.e, broken) value for VJ */
+				/* compression option*/ 
+
+typedef struct ipcp_options {
+    bool neg_addr;		/* Negotiate IP Address? */
+    bool old_addrs;		/* Use old (IP-Addresses) option? */
+    bool req_addr;		/* Ask peer to send IP address? */
+    bool default_route;		/* Assign default route through interface? */
+    bool proxy_arp;		/* Make proxy ARP entry for peer? */
+    bool neg_vj;		/* Van Jacobson Compression? */
+    bool old_vj;		/* use old (short) form of VJ option? */
+    bool accept_local;		/* accept peer's value for ouraddr */
+    bool accept_remote;		/* accept peer's value for hisaddr */
+    bool req_dns1;		/* Ask peer to send primary DNS address? */
+    bool req_dns2;		/* Ask peer to send secondary DNS address? */
+    int  vj_protocol;		/* protocol value to use in VJ option */
+    int  maxslotindex;		/* values for RFC1332 VJ compression neg. */
+    bool cflag;
+    u_int32_t ouraddr, hisaddr;	/* Addresses in NETWORK BYTE ORDER */
+    u_int32_t dnsaddr[2];	/* Primary and secondary MS DNS entries */
+    u_int32_t winsaddr[2];	/* Primary and secondary MS WINS entries */
+} ipcp_options;
+
+extern fsm ipcp_fsm[];
+extern ipcp_options ipcp_wantoptions[];
+extern ipcp_options ipcp_gotoptions[];
+extern ipcp_options ipcp_allowoptions[];
+extern ipcp_options ipcp_hisoptions[];
+
+char *ip_ntoa __P((u_int32_t));
+
+extern struct protent ipcp_protent;
diff --git a/pppd_plugin/src/pppd/ipv6cp.h b/pppd_plugin/src/pppd/ipv6cp.h
new file mode 100644
index 0000000..cc4568d
--- /dev/null
+++ b/pppd_plugin/src/pppd/ipv6cp.h
@@ -0,0 +1,171 @@
+/*
+ * ipv6cp.h - PPP IPV6 Control Protocol.
+ *
+ * Copyright (c) 1999 Tommi Komulainen.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Tommi Komulainen
+ *     <Tommi.Komulainen@iki.fi>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+/*  Original version, based on RFC2023 :
+
+    Copyright (c) 1995, 1996, 1997 Francis.Dupont@inria.fr, INRIA Rocquencourt,
+    Alain.Durand@imag.fr, IMAG,
+    Jean-Luc.Richier@imag.fr, IMAG-LSR.
+
+    Copyright (c) 1998, 1999 Francis.Dupont@inria.fr, GIE DYADE,
+    Alain.Durand@imag.fr, IMAG,
+    Jean-Luc.Richier@imag.fr, IMAG-LSR.
+
+    Ce travail a été fait au sein du GIE DYADE (Groupement d'Intérêt
+    Économique ayant pour membres BULL S.A. et l'INRIA).
+
+    Ce logiciel informatique est disponible aux conditions
+    usuelles dans la recherche, c'est-à-dire qu'il peut
+    être utilisé, copié, modifié, distribué à l'unique
+    condition que ce texte soit conservé afin que
+    l'origine de ce logiciel soit reconnue.
+
+    Le nom de l'Institut National de Recherche en Informatique
+    et en Automatique (INRIA), de l'IMAG, ou d'une personne morale
+    ou physique ayant participé à l'élaboration de ce logiciel ne peut
+    être utilisé sans son accord préalable explicite.
+
+    Ce logiciel est fourni tel quel sans aucune garantie,
+    support ou responsabilité d'aucune sorte.
+    Ce logiciel est dérivé de sources d'origine
+    "University of California at Berkeley" et
+    "Digital Equipment Corporation" couvertes par des copyrights.
+
+    L'Institut d'Informatique et de Mathématiques Appliquées de Grenoble (IMAG)
+    est une fédération d'unités mixtes de recherche du CNRS, de l'Institut National
+    Polytechnique de Grenoble et de l'Université Joseph Fourier regroupant
+    sept laboratoires dont le laboratoire Logiciels, Systèmes, Réseaux (LSR).
+
+    This work has been done in the context of GIE DYADE (joint R & D venture
+    between BULL S.A. and INRIA).
+
+    This software is available with usual "research" terms
+    with the aim of retain credits of the software. 
+    Permission to use, copy, modify and distribute this software for any
+    purpose and without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies,
+    and the name of INRIA, IMAG, or any contributor not be used in advertising
+    or publicity pertaining to this material without the prior explicit
+    permission. The software is provided "as is" without any
+    warranties, support or liabilities of any kind.
+    This software is derived from source code from
+    "University of California at Berkeley" and
+    "Digital Equipment Corporation" protected by copyrights.
+
+    Grenoble's Institute of Computer Science and Applied Mathematics (IMAG)
+    is a federation of seven research units funded by the CNRS, National
+    Polytechnic Institute of Grenoble and University Joseph Fourier.
+    The research unit in Software, Systems, Networks (LSR) is member of IMAG.
+*/
+
+/*
+ * Derived from :
+ *
+ *
+ * ipcp.h - IP Control Protocol definitions.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: ipv6cp.h,v 1.7 2002/12/04 23:03:32 paulus Exp $
+ */
+
+/*
+ * Options.
+ */
+#define CI_IFACEID	1	/* Interface Identifier */
+#define CI_COMPRESSTYPE	2	/* Compression Type     */
+
+/* No compression types yet defined.
+ *#define IPV6CP_COMP	0x004f
+ */
+typedef struct ipv6cp_options {
+    int neg_ifaceid;		/* Negotiate interface identifier? */
+    int req_ifaceid;		/* Ask peer to send interface identifier? */
+    int accept_local;		/* accept peer's value for iface id? */
+    int opt_local;		/* ourtoken set by option */
+    int opt_remote;		/* histoken set by option */
+    int use_ip;			/* use IP as interface identifier */
+#if defined(SOL2) || defined(__linux__)
+    int use_persistent;		/* use uniquely persistent value for address */
+#endif /* defined(SOL2) */
+    int neg_vj;			/* Van Jacobson Compression? */
+    u_short vj_protocol;	/* protocol value to use in VJ option */
+    eui64_t ourid, hisid;	/* Interface identifiers */
+} ipv6cp_options;
+
+extern fsm ipv6cp_fsm[];
+extern ipv6cp_options ipv6cp_wantoptions[];
+extern ipv6cp_options ipv6cp_gotoptions[];
+extern ipv6cp_options ipv6cp_allowoptions[];
+extern ipv6cp_options ipv6cp_hisoptions[];
+
+extern struct protent ipv6cp_protent;
diff --git a/pppd_plugin/src/pppd/ipxcp.h b/pppd_plugin/src/pppd/ipxcp.h
new file mode 100644
index 0000000..396b6bb
--- /dev/null
+++ b/pppd_plugin/src/pppd/ipxcp.h
@@ -0,0 +1,94 @@
+/*
+ * ipxcp.h - IPX Control Protocol definitions.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: ipxcp.h,v 1.5 2002/12/04 23:03:32 paulus Exp $
+ */
+
+/*
+ * Options.
+ */
+#define IPX_NETWORK_NUMBER        1   /* IPX Network Number */
+#define IPX_NODE_NUMBER           2
+#define IPX_COMPRESSION_PROTOCOL  3
+#define IPX_ROUTER_PROTOCOL       4
+#define IPX_ROUTER_NAME           5
+#define IPX_COMPLETE              6
+
+/* Values for the router protocol */
+#define IPX_NONE		  0
+#define RIP_SAP			  2
+#define NLSP			  4
+
+typedef struct ipxcp_options {
+    bool neg_node;		/* Negotiate IPX node number? */
+    bool req_node;		/* Ask peer to send IPX node number? */
+
+    bool neg_nn;		/* Negotiate IPX network number? */
+    bool req_nn;		/* Ask peer to send IPX network number */
+
+    bool neg_name;		/* Negotiate IPX router name */
+    bool neg_complete;		/* Negotiate completion */
+    bool neg_router;		/* Negotiate IPX router number */
+
+    bool accept_local;		/* accept peer's value for ournode */
+    bool accept_remote;		/* accept peer's value for hisnode */
+    bool accept_network;	/* accept network number */
+
+    bool tried_nlsp;		/* I have suggested NLSP already */
+    bool tried_rip;		/* I have suggested RIP/SAP already */
+
+    u_int32_t his_network;	/* base network number */
+    u_int32_t our_network;	/* our value for network number */
+    u_int32_t network;		/* the final network number */
+
+    u_char his_node[6];		/* peer's node number */
+    u_char our_node[6];		/* our node number */
+    u_char name [48];		/* name of the router */
+    int    router;		/* routing protocol */
+} ipxcp_options;
+
+extern fsm ipxcp_fsm[];
+extern ipxcp_options ipxcp_wantoptions[];
+extern ipxcp_options ipxcp_gotoptions[];
+extern ipxcp_options ipxcp_allowoptions[];
+extern ipxcp_options ipxcp_hisoptions[];
+
+extern struct protent ipxcp_protent;
diff --git a/pppd_plugin/src/pppd/lcp.h b/pppd_plugin/src/pppd/lcp.h
new file mode 100644
index 0000000..23f3c84
--- /dev/null
+++ b/pppd_plugin/src/pppd/lcp.h
@@ -0,0 +1,119 @@
+/*
+ * lcp.h - Link Control Protocol definitions.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: lcp.h,v 1.19 2002/12/04 23:03:32 paulus Exp $
+ */
+
+/*
+ * Options.
+ */
+#define CI_MRU		1	/* Maximum Receive Unit */
+#define CI_ASYNCMAP	2	/* Async Control Character Map */
+#define CI_AUTHTYPE	3	/* Authentication Type */
+#define CI_QUALITY	4	/* Quality Protocol */
+#define CI_MAGICNUMBER	5	/* Magic Number */
+#define CI_PCOMPRESSION	7	/* Protocol Field Compression */
+#define CI_ACCOMPRESSION 8	/* Address/Control Field Compression */
+#define CI_CALLBACK	13	/* callback */
+#define CI_MRRU		17	/* max reconstructed receive unit; multilink */
+#define CI_SSNHF	18	/* short sequence numbers for multilink */
+#define CI_EPDISC	19	/* endpoint discriminator */
+
+/*
+ * LCP-specific packet types.
+ */
+#define PROTREJ		8	/* Protocol Reject */
+#define ECHOREQ		9	/* Echo Request */
+#define ECHOREP		10	/* Echo Reply */
+#define DISCREQ		11	/* Discard Request */
+#define CBCP_OPT	6	/* Use callback control protocol */
+
+/*
+ * The state of options is described by an lcp_options structure.
+ */
+typedef struct lcp_options {
+    bool passive;		/* Don't die if we don't get a response */
+    bool silent;		/* Wait for the other end to start first */
+    bool restart;		/* Restart vs. exit after close */
+    bool neg_mru;		/* Negotiate the MRU? */
+    bool neg_asyncmap;		/* Negotiate the async map? */
+    bool neg_upap;		/* Ask for UPAP authentication? */
+    bool neg_chap;		/* Ask for CHAP authentication? */
+    bool neg_eap;		/* Ask for EAP authentication? */
+    bool neg_magicnumber;	/* Ask for magic number? */
+    bool neg_pcompression;	/* HDLC Protocol Field Compression? */
+    bool neg_accompression;	/* HDLC Address/Control Field Compression? */
+    bool neg_lqr;		/* Negotiate use of Link Quality Reports */
+    bool neg_cbcp;		/* Negotiate use of CBCP */
+    bool neg_mrru;		/* negotiate multilink MRRU */
+    bool neg_ssnhf;		/* negotiate short sequence numbers */
+    bool neg_endpoint;		/* negotiate endpoint discriminator */
+    int  mru;			/* Value of MRU */
+    int	 mrru;			/* Value of MRRU, and multilink enable */
+    u_char chap_mdtype;		/* which MD types (hashing algorithm) */
+    u_int32_t asyncmap;		/* Value of async map */
+    u_int32_t magicnumber;
+    int  numloops;		/* Number of loops during magic number neg. */
+    u_int32_t lqr_period;	/* Reporting period for LQR 1/100ths second */
+    struct epdisc endpoint;	/* endpoint discriminator */
+} lcp_options;
+
+extern fsm lcp_fsm[];
+extern lcp_options lcp_wantoptions[];
+extern lcp_options lcp_gotoptions[];
+extern lcp_options lcp_allowoptions[];
+extern lcp_options lcp_hisoptions[];
+
+#define DEFMRU	1500		/* Try for this */
+#define MINMRU	128		/* No MRUs below this */
+#define MAXMRU	16384		/* Normally limit MRU to this */
+
+void lcp_open __P((int));
+void lcp_close __P((int, char *));
+void lcp_lowerup __P((int));
+void lcp_lowerdown __P((int));
+void lcp_sprotrej __P((int, u_char *, int));	/* send protocol reject */
+
+extern struct protent lcp_protent;
+
+/* Default number of times we receive our magic number from the peer
+   before deciding the link is looped-back. */
+#define DEFLOOPBACKFAIL	10
diff --git a/pppd_plugin/src/pppd/magic.h b/pppd_plugin/src/pppd/magic.h
new file mode 100644
index 0000000..c81213b
--- /dev/null
+++ b/pppd_plugin/src/pppd/magic.h
@@ -0,0 +1,49 @@
+/*
+ * magic.h - PPP Magic Number definitions.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: magic.h,v 1.5 2003/06/11 23:56:26 paulus Exp $
+ */
+
+void magic_init __P((void));	/* Initialize the magic number generator */
+u_int32_t magic __P((void));	/* Returns the next magic number */
+
+/* Fill buffer with random bytes */
+void random_bytes __P((unsigned char *buf, int len));
diff --git a/pppd_plugin/src/pppd/md4.h b/pppd_plugin/src/pppd/md4.h
new file mode 100644
index 0000000..80e8f9a
--- /dev/null
+++ b/pppd_plugin/src/pppd/md4.h
@@ -0,0 +1,64 @@
+
+/*
+** ********************************************************************
+** md4.h -- Header file for implementation of                        **
+** MD4 Message Digest Algorithm                                      **
+** Updated: 2/13/90 by Ronald L. Rivest                              **
+** (C) 1990 RSA Data Security, Inc.                                  **
+** ********************************************************************
+*/
+
+#ifndef __P
+# if defined(__STDC__) || defined(__GNUC__)
+#  define __P(x) x
+# else
+#  define __P(x) ()
+# endif
+#endif
+
+
+/* MDstruct is the data structure for a message digest computation.
+*/
+typedef struct {
+	unsigned int buffer[4]; /* Holds 4-word result of MD computation */
+	unsigned char count[8]; /* Number of bits processed so far */
+	unsigned int done;      /* Nonzero means MD computation finished */
+} MD4_CTX;
+
+/* MD4Init(MD4_CTX *)
+** Initialize the MD4_CTX prepatory to doing a message digest
+** computation.
+*/
+extern void MD4Init __P((MD4_CTX *MD));
+
+/* MD4Update(MD,X,count)
+** Input: X -- a pointer to an array of unsigned characters.
+**        count -- the number of bits of X to use (an unsigned int).
+** Updates MD using the first "count" bits of X.
+** The array pointed to by X is not modified.
+** If count is not a multiple of 8, MD4Update uses high bits of
+** last byte.
+** This is the basic input routine for a user.
+** The routine terminates the MD computation when count < 512, so
+** every MD computation should end with one call to MD4Update with a
+** count less than 512.  Zero is OK for a count.
+*/
+extern void MD4Update __P((MD4_CTX *MD, unsigned char *X, unsigned int count));
+
+/* MD4Print(MD)
+** Prints message digest buffer MD as 32 hexadecimal digits.
+** Order is from low-order byte of buffer[0] to high-order byte
+** of buffer[3].
+** Each byte is printed with high-order hexadecimal digit first.
+*/
+extern void MD4Print __P((MD4_CTX *));
+
+/* MD4Final(buf, MD)
+** Returns message digest from MD and terminates the message
+** digest computation.
+*/
+extern void MD4Final __P((unsigned char *, MD4_CTX *));
+
+/*
+** End of md4.h
+****************************(cut)***********************************/
diff --git a/pppd_plugin/src/pppd/md5.h b/pppd_plugin/src/pppd/md5.h
new file mode 100644
index 0000000..f7a0c96
--- /dev/null
+++ b/pppd_plugin/src/pppd/md5.h
@@ -0,0 +1,65 @@
+/*
+ ***********************************************************************
+ ** md5.h -- header file for implementation of MD5                    **
+ ** RSA Data Security, Inc. MD5 Message-Digest Algorithm              **
+ ** Created: 2/17/90 RLR                                              **
+ ** Revised: 12/27/90 SRD,AJ,BSK,JT Reference C version               **
+ ** Revised (for MD5): RLR 4/27/91                                    **
+ **   -- G modified to have y&~z instead of y&z                       **
+ **   -- FF, GG, HH modified to add in last register done             **
+ **   -- Access pattern: round 2 works mod 5, round 3 works mod 3     **
+ **   -- distinct additive constant for each step                     **
+ **   -- round 4 added, working mod 7                                 **
+ ***********************************************************************
+ */
+
+/*
+ ***********************************************************************
+ ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved.  **
+ **                                                                   **
+ ** License to copy and use this software is granted provided that    **
+ ** it is identified as the "RSA Data Security, Inc. MD5 Message-     **
+ ** Digest Algorithm" in all material mentioning or referencing this  **
+ ** software or this function.                                        **
+ **                                                                   **
+ ** License is also granted to make and use derivative works          **
+ ** provided that such works are identified as "derived from the RSA  **
+ ** Data Security, Inc. MD5 Message-Digest Algorithm" in all          **
+ ** material mentioning or referencing the derived work.              **
+ **                                                                   **
+ ** RSA Data Security, Inc. makes no representations concerning       **
+ ** either the merchantability of this software or the suitability    **
+ ** of this software for any particular purpose.  It is provided "as  **
+ ** is" without express or implied warranty of any kind.              **
+ **                                                                   **
+ ** These notices must be retained in any copies of any part of this  **
+ ** documentation and/or software.                                    **
+ ***********************************************************************
+ */
+
+#ifndef __MD5_INCLUDE__
+
+/* typedef a 32-bit type */
+#ifdef _LP64
+typedef unsigned int UINT4;
+typedef int          INT4;
+#else
+typedef unsigned long UINT4;
+typedef long          INT4;
+#endif
+#define _UINT4_T
+
+/* Data structure for MD5 (Message-Digest) computation */
+typedef struct {
+  UINT4 i[2];                   /* number of _bits_ handled mod 2^64 */
+  UINT4 buf[4];                                    /* scratch buffer */
+  unsigned char in[64];                              /* input buffer */
+  unsigned char digest[16];     /* actual digest after MD5Final call */
+} MD5_CTX;
+
+void MD5_Init ();
+void MD5_Update ();
+void MD5_Final ();
+
+#define __MD5_INCLUDE__
+#endif /* __MD5_INCLUDE__ */
diff --git a/pppd_plugin/src/pppd/pathnames.h b/pppd_plugin/src/pppd/pathnames.h
new file mode 100644
index 0000000..555f40f
--- /dev/null
+++ b/pppd_plugin/src/pppd/pathnames.h
@@ -0,0 +1,59 @@
+/*
+ * define path names
+ *
+ * $Id: pathnames.h,v 1.16 2004/11/13 12:02:22 paulus Exp $
+ */
+
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+
+#else /* HAVE_PATHS_H */
+#ifndef _PATH_VARRUN
+#define _PATH_VARRUN 	"/etc/ppp/"
+#endif
+#define _PATH_DEVNULL	"/dev/null"
+#endif /* HAVE_PATHS_H */
+
+#ifndef _ROOT_PATH
+#define _ROOT_PATH
+#endif
+
+#define _PATH_UPAPFILE 	 _ROOT_PATH "/etc/ppp/pap-secrets"
+#define _PATH_CHAPFILE 	 _ROOT_PATH "/etc/ppp/chap-secrets"
+#define _PATH_SRPFILE 	 _ROOT_PATH "/etc/ppp/srp-secrets"
+#define _PATH_SYSOPTIONS _ROOT_PATH "/etc/ppp/options"
+#define _PATH_IPUP	 _ROOT_PATH "/etc/ppp/ip-up"
+#define _PATH_IPDOWN	 _ROOT_PATH "/etc/ppp/ip-down"
+#define _PATH_AUTHUP	 _ROOT_PATH "/etc/ppp/auth-up"
+#define _PATH_AUTHDOWN	 _ROOT_PATH "/etc/ppp/auth-down"
+#define _PATH_TTYOPT	 _ROOT_PATH "/etc/ppp/options."
+#define _PATH_CONNERRS	 _ROOT_PATH "/etc/ppp/connect-errors"
+#define _PATH_PEERFILES	 _ROOT_PATH "/etc/ppp/peers/"
+#define _PATH_RESOLV	 _ROOT_PATH "/etc/ppp/resolv.conf"
+
+#define _PATH_USEROPT	 ".ppprc"
+#define	_PATH_PSEUDONYM	 ".ppp_pseudonym"
+
+#ifdef INET6
+#define _PATH_IPV6UP     _ROOT_PATH "/etc/ppp/ipv6-up"
+#define _PATH_IPV6DOWN   _ROOT_PATH "/etc/ppp/ipv6-down"
+#endif
+
+#ifdef IPX_CHANGE
+#define _PATH_IPXUP	 _ROOT_PATH "/etc/ppp/ipx-up"
+#define _PATH_IPXDOWN	 _ROOT_PATH "/etc/ppp/ipx-down"
+#endif /* IPX_CHANGE */
+
+#ifdef __STDC__
+#define _PATH_PPPDB	_ROOT_PATH _PATH_VARRUN "pppd2.tdb"
+#else /* __STDC__ */
+#ifdef HAVE_PATHS_H
+#define _PATH_PPPDB	"/var/run/pppd2.tdb"
+#else
+#define _PATH_PPPDB	"/etc/ppp/pppd2.tdb"
+#endif
+#endif /* __STDC__ */
+
+#ifdef PLUGIN
+#define _PATH_PLUGIN	"/usr/lib/pppd/" VERSION
+#endif /* PLUGIN */
diff --git a/pppd_plugin/src/pppd/pppcrypt.h b/pppd_plugin/src/pppd/pppcrypt.h
new file mode 100644
index 0000000..adcdcbc
--- /dev/null
+++ b/pppd_plugin/src/pppd/pppcrypt.h
@@ -0,0 +1,48 @@
+/*
+ * pppcrypt.c - PPP/DES linkage for MS-CHAP and EAP SRP-SHA1
+ *
+ * Extracted from chap_ms.c by James Carlson.
+ *
+ * Copyright (c) 1995 Eric Rosenquist.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name(s) of the authors of this software must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission.
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef PPPCRYPT_H
+#define	PPPCRYPT_H
+
+#ifdef HAVE_CRYPT_H
+#include <crypt.h>
+#endif
+
+#ifndef USE_CRYPT
+#include <des.h>
+#endif
+
+extern bool	DesSetkey __P((u_char *));
+extern bool	DesEncrypt __P((u_char *, u_char *));
+extern bool	DesDecrypt __P((u_char *, u_char *));
+
+#endif /* PPPCRYPT_H */
diff --git a/pppd_plugin/src/pppd/pppd.h b/pppd_plugin/src/pppd/pppd.h
new file mode 100644
index 0000000..8866bc7
--- /dev/null
+++ b/pppd_plugin/src/pppd/pppd.h
@@ -0,0 +1,904 @@
+/*
+ * pppd.h - PPP daemon global declarations.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: pppd.h,v 1.88 2004/11/13 12:02:22 paulus Exp $
+ */
+
+/*
+ * TODO:
+ */
+
+#ifndef __PPPD_H__
+#define __PPPD_H__
+
+#include <stdio.h>		/* for FILE */
+#include <limits.h>		/* for NGROUPS_MAX */
+#include <sys/param.h>		/* for MAXPATHLEN and BSD4_4, if defined */
+#include <sys/types.h>		/* for u_int32_t, if defined */
+#include <sys/time.h>		/* for struct timeval */
+#include <net/ppp_defs.h>
+
+#if defined(__STDC__)
+#include <stdarg.h>
+#define __V(x)	x
+#else
+#include <varargs.h>
+#define __V(x)	(va_alist) va_dcl
+#define const
+#define volatile
+#endif
+
+#ifdef INET6
+#include "eui64.h"
+#endif
+
+/*
+ * Limits.
+ */
+
+#define NUM_PPP		1	/* One PPP interface supported (per process) */
+#define MAXWORDLEN	1024	/* max length of word in file (incl null) */
+#define MAXARGS		1	/* max # args to a command */
+#define MAXNAMELEN	256	/* max length of hostname or name for auth */
+#define MAXSECRETLEN	256	/* max length of password or secret */
+
+/*
+ * Option descriptor structure.
+ */
+
+typedef unsigned char	bool;
+
+enum opt_type {
+	o_special_noarg = 0,
+	o_special = 1,
+	o_bool,
+	o_int,
+	o_uint32,
+	o_string,
+	o_wild
+};
+
+typedef struct {
+	char	*name;		/* name of the option */
+	enum opt_type type;
+	void	*addr;
+	char	*description;
+	unsigned int flags;
+	void	*addr2;
+	int	upper_limit;
+	int	lower_limit;
+	const char *source;
+	short int priority;
+	short int winner;
+} option_t;
+
+/* Values for flags */
+#define OPT_VALUE	0xff	/* mask for presupplied value */
+#define OPT_HEX		0x100	/* int option is in hex */
+#define OPT_NOARG	0x200	/* option doesn't take argument */
+#define OPT_OR		0x400	/* OR in argument to value */
+#define OPT_INC		0x800	/* increment value */
+#define OPT_A2OR	0x800	/* for o_bool, OR arg to *(u_char *)addr2 */
+#define OPT_PRIV	0x1000	/* privileged option */
+#define OPT_STATIC	0x2000	/* string option goes into static array */
+#define OPT_LLIMIT	0x4000	/* check value against lower limit */
+#define OPT_ULIMIT	0x8000	/* check value against upper limit */
+#define OPT_LIMITS	(OPT_LLIMIT|OPT_ULIMIT)
+#define OPT_ZEROOK	0x10000	/* 0 value is OK even if not within limits */
+#define OPT_HIDE	0x10000	/* for o_string, print value as ?????? */
+#define OPT_A2LIST	0x10000 /* for o_special, keep list of values */
+#define OPT_A2CLRB	0x10000 /* o_bool, clr val bits in *(u_char *)addr2 */
+#define OPT_NOINCR	0x20000	/* value mustn't be increased */
+#define OPT_ZEROINF	0x40000	/* with OPT_NOINCR, 0 == infinity */
+#define OPT_PRIO	0x80000	/* process option priorities for this option */
+#define OPT_PRIOSUB	0x100000 /* subsidiary member of priority group */
+#define OPT_ALIAS	0x200000 /* option is alias for previous option */
+#define OPT_A2COPY	0x400000 /* addr2 -> second location to rcv value */
+#define OPT_ENABLE	0x800000 /* use *addr2 as enable for option */
+#define OPT_A2CLR	0x1000000 /* clear *(bool *)addr2 */
+#define OPT_PRIVFIX	0x2000000 /* user can't override if set by root */
+#define OPT_INITONLY	0x4000000 /* option can only be set in init phase */
+#define OPT_DEVEQUIV	0x8000000 /* equiv to device name */
+#define OPT_DEVNAM	(OPT_INITONLY | OPT_DEVEQUIV)
+#define OPT_A2PRINTER	0x10000000 /* *addr2 is a fn for printing option */
+#define OPT_A2STRVAL	0x20000000 /* *addr2 points to current string value */
+#define OPT_NOPRINT	0x40000000 /* don't print this option at all */
+
+#define OPT_VAL(x)	((x) & OPT_VALUE)
+
+/* Values for priority */
+#define OPRIO_DEFAULT	0	/* a default value */
+#define OPRIO_CFGFILE	1	/* value from a configuration file */
+#define OPRIO_CMDLINE	2	/* value from the command line */
+#define OPRIO_SECFILE	3	/* value from options in a secrets file */
+#define OPRIO_ROOT	100	/* added to priority if OPT_PRIVFIX && root */
+
+#ifndef GIDSET_TYPE
+#define GIDSET_TYPE	gid_t
+#endif
+
+/* Structure representing a list of permitted IP addresses. */
+struct permitted_ip {
+    int		permit;		/* 1 = permit, 0 = forbid */
+    u_int32_t	base;		/* match if (addr & mask) == base */
+    u_int32_t	mask;		/* base and mask are in network byte order */
+};
+
+/*
+ * Unfortunately, the linux kernel driver uses a different structure
+ * for statistics from the rest of the ports.
+ * This structure serves as a common representation for the bits
+ * pppd needs.
+ */
+struct pppd_stats {
+    unsigned int	bytes_in;
+    unsigned int	bytes_out;
+    unsigned int	pkts_in;
+    unsigned int	pkts_out;
+};
+
+/* Used for storing a sequence of words.  Usually malloced. */
+struct wordlist {
+    struct wordlist	*next;
+    char		*word;
+};
+
+/* An endpoint discriminator, used with multilink. */
+#define MAX_ENDP_LEN	20	/* maximum length of discriminator value */
+struct epdisc {
+    unsigned char	class;
+    unsigned char	length;
+    unsigned char	value[MAX_ENDP_LEN];
+};
+
+/* values for epdisc.class */
+#define EPD_NULL	0	/* null discriminator, no data */
+#define EPD_LOCAL	1
+#define EPD_IP		2
+#define EPD_MAC		3
+#define EPD_MAGIC	4
+#define EPD_PHONENUM	5
+
+typedef void (*notify_func) __P((void *, int));
+
+struct notifier {
+    struct notifier *next;
+    notify_func	    func;
+    void	    *arg;
+};
+
+/*
+ * Global variables.
+ */
+
+extern int	hungup;		/* Physical layer has disconnected */
+extern int	ifunit;		/* Interface unit number */
+extern char	ifname[];	/* Interface name */
+extern char	hostname[];	/* Our hostname */
+extern u_char	outpacket_buf[]; /* Buffer for outgoing packets */
+extern int	devfd;		/* fd of underlying device */
+extern int	fd_ppp;		/* fd for talking PPP */
+extern int	phase;		/* Current state of link - see values below */
+extern int	baud_rate;	/* Current link speed in bits/sec */
+extern char	*progname;	/* Name of this program */
+extern int	redirect_stderr;/* Connector's stderr should go to file */
+extern char	peer_authname[];/* Authenticated name of peer */
+extern int	auth_done[NUM_PPP]; /* Methods actually used for auth */
+extern int	privileged;	/* We were run by real-uid root */
+extern int	need_holdoff;	/* Need holdoff period after link terminates */
+extern char	**script_env;	/* Environment variables for scripts */
+extern int	detached;	/* Have detached from controlling tty */
+extern GIDSET_TYPE groups[NGROUPS_MAX];	/* groups the user is in */
+extern int	ngroups;	/* How many groups valid in groups */
+extern struct pppd_stats link_stats; /* byte/packet counts etc. for link */
+extern int	link_stats_valid; /* set if link_stats is valid */
+extern unsigned	link_connect_time; /* time the link was up for */
+extern int	using_pty;	/* using pty as device (notty or pty opt.) */
+extern int	log_to_fd;	/* logging to this fd as well as syslog */
+extern bool	log_default;	/* log_to_fd is default (stdout) */
+extern char	*no_ppp_msg;	/* message to print if ppp not in kernel */
+extern volatile int status;	/* exit status for pppd */
+extern bool	devnam_fixed;	/* can no longer change devnam */
+extern int	unsuccess;	/* # unsuccessful connection attempts */
+extern int	do_callback;	/* set if we want to do callback next */
+extern int	doing_callback;	/* set if this is a callback */
+extern int	error_count;	/* # of times error() has been called */
+extern char	ppp_devnam[MAXPATHLEN];
+extern char     remote_number[MAXNAMELEN]; /* Remote telephone number, if avail. */
+extern int      ppp_session_number; /* Session number (eg PPPoE session) */
+extern int	fd_devnull;	/* fd open to /dev/null */
+
+extern int	listen_time;	/* time to listen first (ms) */
+extern bool	doing_multilink;
+extern bool	multilink_master;
+extern bool	bundle_eof;
+extern bool	bundle_terminating;
+
+extern struct notifier *pidchange;   /* for notifications of pid changing */
+extern struct notifier *phasechange; /* for notifications of phase changes */
+extern struct notifier *exitnotify;  /* for notification that we're exiting */
+extern struct notifier *sigreceived; /* notification of received signal */
+extern struct notifier *ip_up_notifier; /* IPCP has come up */
+extern struct notifier *ip_down_notifier; /* IPCP has gone down */
+extern struct notifier *auth_up_notifier; /* peer has authenticated */
+extern struct notifier *link_down_notifier; /* link has gone down */
+extern struct notifier *fork_notifier;	/* we are a new child process */
+
+/* Values for do_callback and doing_callback */
+#define CALLBACK_DIALIN		1	/* we are expecting the call back */
+#define CALLBACK_DIALOUT	2	/* we are dialling out to call back */
+
+/*
+ * Variables set by command-line options.
+ */
+
+extern int	debug;		/* Debug flag */
+extern int	kdebugflag;	/* Tell kernel to print debug messages */
+extern int	default_device;	/* Using /dev/tty or equivalent */
+extern char	devnam[MAXPATHLEN];	/* Device name */
+extern int	crtscts;	/* Use hardware flow control */
+extern bool	modem;		/* Use modem control lines */
+extern int	inspeed;	/* Input/Output speed requested */
+extern u_int32_t netmask;	/* IP netmask to set on interface */
+extern bool	lockflag;	/* Create lock file to lock the serial dev */
+extern bool	nodetach;	/* Don't detach from controlling tty */
+extern bool	updetach;	/* Detach from controlling tty when link up */
+extern char	*initializer;	/* Script to initialize physical link */
+extern char	*connect_script; /* Script to establish physical link */
+extern char	*disconnect_script; /* Script to disestablish physical link */
+extern char	*welcomer;	/* Script to welcome client after connection */
+extern char	*ptycommand;	/* Command to run on other side of pty */
+extern int	maxconnect;	/* Maximum connect time (seconds) */
+extern char	user[MAXNAMELEN];/* Our name for authenticating ourselves */
+extern char	passwd[MAXSECRETLEN];	/* Password for PAP or CHAP */
+extern bool	auth_required;	/* Peer is required to authenticate */
+extern bool	persist;	/* Reopen link after it goes down */
+extern bool	uselogin;	/* Use /etc/passwd for checking PAP */
+extern char	our_name[MAXNAMELEN];/* Our name for authentication purposes */
+extern char	remote_name[MAXNAMELEN]; /* Peer's name for authentication */
+extern bool	explicit_remote;/* remote_name specified with remotename opt */
+extern bool	demand;		/* Do dial-on-demand */
+extern char	*ipparam;	/* Extra parameter for ip up/down scripts */
+extern bool	cryptpap;	/* Others' PAP passwords are encrypted */
+extern int	idle_time_limit;/* Shut down link if idle for this long */
+extern int	holdoff;	/* Dead time before restarting */
+extern bool	holdoff_specified; /* true if user gave a holdoff value */
+extern bool	notty;		/* Stdin/out is not a tty */
+extern char	*pty_socket;	/* Socket to connect to pty */
+extern char	*record_file;	/* File to record chars sent/received */
+extern bool	sync_serial;	/* Device is synchronous serial device */
+extern int	maxfail;	/* Max # of unsuccessful connection attempts */
+extern char	linkname[MAXPATHLEN]; /* logical name for link */
+extern bool	tune_kernel;	/* May alter kernel settings as necessary */
+extern int	connect_delay;	/* Time to delay after connect script */
+extern int	max_data_rate;	/* max bytes/sec through charshunt */
+extern int	req_unit;	/* interface unit number to use */
+extern bool	multilink;	/* enable multilink operation */
+extern bool	noendpoint;	/* don't send or accept endpt. discrim. */
+extern char	*bundle_name;	/* bundle name for multilink */
+extern bool	dump_options;	/* print out option values */
+extern bool	dryrun;		/* check everything, print options, exit */
+extern int	child_wait;	/* # seconds to wait for children at end */
+
+#ifdef MAXOCTETS
+extern unsigned int maxoctets;	     /* Maximum octetes per session (in bytes) */
+extern int       maxoctets_dir;      /* Direction :
+				      0 - in+out (default)
+				      1 - in 
+				      2 - out
+				      3 - max(in,out) */
+extern int       maxoctets_timeout;  /* Timeout for check of octets limit */
+#define PPP_OCTETS_DIRECTION_SUM        0
+#define PPP_OCTETS_DIRECTION_IN         1
+#define PPP_OCTETS_DIRECTION_OUT        2
+#define PPP_OCTETS_DIRECTION_MAXOVERAL  3
+/* same as previos, but little different on RADIUS side */
+#define PPP_OCTETS_DIRECTION_MAXSESSION 4	
+#endif
+
+#ifdef PPP_FILTER
+extern struct	bpf_program pass_filter;   /* Filter for pkts to pass */
+extern struct	bpf_program active_filter; /* Filter for link-active pkts */
+#endif
+
+#ifdef MSLANMAN
+extern bool	ms_lanman;	/* Use LanMan password instead of NT */
+				/* Has meaning only with MS-CHAP challenges */
+#endif
+
+/* Values for auth_pending, auth_done */
+#define PAP_WITHPEER	0x1
+#define PAP_PEER	0x2
+#define CHAP_WITHPEER	0x4
+#define CHAP_PEER	0x8
+#define EAP_WITHPEER	0x10
+#define EAP_PEER	0x20
+
+/* Values for auth_done only */
+#define CHAP_MD5_WITHPEER	0x40
+#define CHAP_MD5_PEER		0x80
+#define CHAP_MS_SHIFT		8	/* LSB position for MS auths */
+#define CHAP_MS_WITHPEER	0x100
+#define CHAP_MS_PEER		0x200
+#define CHAP_MS2_WITHPEER	0x400
+#define CHAP_MS2_PEER		0x800
+
+extern char *current_option;	/* the name of the option being parsed */
+extern int  privileged_option;	/* set iff the current option came from root */
+extern char *option_source;	/* string saying where the option came from */
+extern int  option_priority;	/* priority of current options */
+
+/*
+ * Values for phase.
+ */
+#define PHASE_DEAD		0
+#define PHASE_INITIALIZE	1
+#define PHASE_SERIALCONN	2
+#define PHASE_DORMANT		3
+#define PHASE_ESTABLISH		4
+#define PHASE_AUTHENTICATE	5
+#define PHASE_CALLBACK		6
+#define PHASE_NETWORK		7
+#define PHASE_RUNNING		8
+#define PHASE_TERMINATE		9
+#define PHASE_DISCONNECT	10
+#define PHASE_HOLDOFF		11
+#define PHASE_MASTER		12
+
+/*
+ * The following struct gives the addresses of procedures to call
+ * for a particular protocol.
+ */
+struct protent {
+    u_short protocol;		/* PPP protocol number */
+    /* Initialization procedure */
+    void (*init) __P((int unit));
+    /* Process a received packet */
+    void (*input) __P((int unit, u_char *pkt, int len));
+    /* Process a received protocol-reject */
+    void (*protrej) __P((int unit));
+    /* Lower layer has come up */
+    void (*lowerup) __P((int unit));
+    /* Lower layer has gone down */
+    void (*lowerdown) __P((int unit));
+    /* Open the protocol */
+    void (*open) __P((int unit));
+    /* Close the protocol */
+    void (*close) __P((int unit, char *reason));
+    /* Print a packet in readable form */
+    int  (*printpkt) __P((u_char *pkt, int len,
+			  void (*printer) __P((void *, char *, ...)),
+			  void *arg));
+    /* Process a received data packet */
+    void (*datainput) __P((int unit, u_char *pkt, int len));
+    bool enabled_flag;		/* 0 iff protocol is disabled */
+    char *name;			/* Text name of protocol */
+    char *data_name;		/* Text name of corresponding data protocol */
+    option_t *options;		/* List of command-line options */
+    /* Check requested options, assign defaults */
+    void (*check_options) __P((void));
+    /* Configure interface for demand-dial */
+    int  (*demand_conf) __P((int unit));
+    /* Say whether to bring up link for this pkt */
+    int  (*active_pkt) __P((u_char *pkt, int len));
+};
+
+/* Table of pointers to supported protocols */
+extern struct protent *protocols[];
+
+/*
+ * This struct contains pointers to a set of procedures for
+ * doing operations on a "channel".  A channel provides a way
+ * to send and receive PPP packets - the canonical example is
+ * a serial port device in PPP line discipline (or equivalently
+ * with PPP STREAMS modules pushed onto it).
+ */
+struct channel {
+	/* set of options for this channel */
+	option_t *options;
+	/* find and process a per-channel options file */
+	void (*process_extra_options) __P((void));
+	/* check all the options that have been given */
+	void (*check_options) __P((void));
+	/* get the channel ready to do PPP, return a file descriptor */
+	int  (*connect) __P((void));
+	/* we're finished with the channel */
+	void (*disconnect) __P((void));
+	/* put the channel into PPP `mode' */
+	int  (*establish_ppp) __P((int));
+	/* take the channel out of PPP `mode', restore loopback if demand */
+	void (*disestablish_ppp) __P((int));
+	/* set the transmit-side PPP parameters of the channel */
+	void (*send_config) __P((int, u_int32_t, int, int));
+	/* set the receive-side PPP parameters of the channel */
+	void (*recv_config) __P((int, u_int32_t, int, int));
+	/* cleanup on error or normal exit */
+	void (*cleanup) __P((void));
+	/* close the device, called in children after fork */
+	void (*close) __P((void));
+};
+
+extern struct channel *the_channel;
+
+/*
+ * Prototypes.
+ */
+
+/* Procedures exported from main.c. */
+void set_ifunit __P((int));	/* set stuff that depends on ifunit */
+void detach __P((void));	/* Detach from controlling tty */
+void die __P((int));		/* Cleanup and exit */
+void quit __P((void));		/* like die(1) */
+void novm __P((char *));	/* Say we ran out of memory, and die */
+void timeout __P((void (*func)(void *), void *arg, int s, int us));
+				/* Call func(arg) after s.us seconds */
+void untimeout __P((void (*func)(void *), void *arg));
+				/* Cancel call to func(arg) */
+void record_child __P((int, char *, void (*) (void *), void *));
+pid_t safe_fork __P((int, int, int));	/* Fork & close stuff in child */
+int  device_script __P((char *cmd, int in, int out, int dont_wait));
+				/* Run `cmd' with given stdin and stdout */
+pid_t run_program __P((char *prog, char **args, int must_exist,
+		       void (*done)(void *), void *arg));
+				/* Run program prog with args in child */
+void reopen_log __P((void));	/* (re)open the connection to syslog */
+void print_link_stats __P((void)); /* Print stats, if available */
+void reset_link_stats __P((int)); /* Reset (init) stats when link goes up */
+void update_link_stats __P((int)); /* Get stats at link termination */
+void script_setenv __P((char *, char *, int));	/* set script env var */
+void script_unsetenv __P((char *));		/* unset script env var */
+void new_phase __P((int));	/* signal start of new phase */
+void add_notifier __P((struct notifier **, notify_func, void *));
+void remove_notifier __P((struct notifier **, notify_func, void *));
+void notify __P((struct notifier *, int));
+int  ppp_send_config __P((int, int, u_int32_t, int, int));
+int  ppp_recv_config __P((int, int, u_int32_t, int, int));
+void remove_pidfiles __P((void));
+void lock_db __P((void));
+void unlock_db __P((void));
+
+/* Procedures exported from tty.c. */
+void tty_init __P((void));
+
+/* Procedures exported from utils.c. */
+void log_packet __P((u_char *, int, char *, int));
+				/* Format a packet and log it with syslog */
+void print_string __P((char *, int,  void (*) (void *, char *, ...),
+		void *));	/* Format a string for output */
+int slprintf __P((char *, int, char *, ...));		/* sprintf++ */
+int vslprintf __P((char *, int, char *, va_list));	/* vsprintf++ */
+size_t strlcpy __P((char *, const char *, size_t));	/* safe strcpy */
+size_t strlcat __P((char *, const char *, size_t));	/* safe strncpy */
+void dbglog __P((char *, ...));	/* log a debug message */
+void info __P((char *, ...));	/* log an informational message */
+void notice __P((char *, ...));	/* log a notice-level message */
+void warn __P((char *, ...));	/* log a warning message */
+void error __P((char *, ...));	/* log an error message */
+void fatal __P((char *, ...));	/* log an error message and die(1) */
+void init_pr_log __P((char *, int));	/* initialize for using pr_log */
+void pr_log __P((void *, char *, ...));	/* printer fn, output to syslog */
+void end_pr_log __P((void));	/* finish up after using pr_log */
+void dump_packet __P((const char *, u_char *, int));
+				/* dump packet to debug log if interesting */
+ssize_t complete_read __P((int, void *, size_t));
+				/* read a complete buffer */
+
+/* Procedures exported from auth.c */
+void link_required __P((int));	  /* we are starting to use the link */
+void link_terminated __P((int));  /* we are finished with the link */
+void link_down __P((int));	  /* the LCP layer has left the Opened state */
+void upper_layers_down __P((int));/* take all NCPs down */
+void link_established __P((int)); /* the link is up; authenticate now */
+void start_networks __P((int));   /* start all the network control protos */
+void continue_networks __P((int)); /* start network [ip, etc] control protos */
+void np_up __P((int, int));	  /* a network protocol has come up */
+void np_down __P((int, int));	  /* a network protocol has gone down */
+void np_finished __P((int, int)); /* a network protocol no longer needs link */
+void auth_peer_fail __P((int, int));
+				/* peer failed to authenticate itself */
+void auth_peer_success __P((int, int, int, char *, int));
+				/* peer successfully authenticated itself */
+void auth_withpeer_fail __P((int, int));
+				/* we failed to authenticate ourselves */
+void auth_withpeer_success __P((int, int, int));
+				/* we successfully authenticated ourselves */
+void auth_check_options __P((void));
+				/* check authentication options supplied */
+void auth_reset __P((int));	/* check what secrets we have */
+int  check_passwd __P((int, char *, int, char *, int, char **));
+				/* Check peer-supplied username/password */
+int  get_secret __P((int, char *, char *, char *, int *, int));
+				/* get "secret" for chap */
+int  get_srp_secret __P((int unit, char *client, char *server, char *secret,
+    int am_server));
+int  auth_ip_addr __P((int, u_int32_t));
+				/* check if IP address is authorized */
+int  auth_number __P((void));	/* check if remote number is authorized */
+int  bad_ip_adrs __P((u_int32_t));
+				/* check if IP address is unreasonable */
+
+/* Procedures exported from demand.c */
+void demand_conf __P((void));	/* config interface(s) for demand-dial */
+void demand_block __P((void));	/* set all NPs to queue up packets */
+void demand_unblock __P((void)); /* set all NPs to pass packets */
+void demand_discard __P((void)); /* set all NPs to discard packets */
+void demand_rexmit __P((int));	/* retransmit saved frames for an NP */
+int  loop_chars __P((unsigned char *, int)); /* process chars from loopback */
+int  loop_frame __P((unsigned char *, int)); /* should we bring link up? */
+
+/* Procedures exported from multilink.c */
+#ifdef HAVE_MULTILINK
+void mp_check_options __P((void)); /* Check multilink-related options */
+int  mp_join_bundle __P((void));  /* join our link to an appropriate bundle */
+void mp_exit_bundle __P((void));  /* have disconnected our link from bundle */
+void mp_bundle_terminated __P((void));
+char *epdisc_to_str __P((struct epdisc *)); /* string from endpoint discrim. */
+int  str_to_epdisc __P((struct epdisc *, char *)); /* endpt disc. from str */
+#else
+#define mp_bundle_terminated()	/* nothing */
+#define mp_exit_bundle()	/* nothing */
+#define doing_multilink		0
+#define multilink_master	0
+#endif
+
+/* Procedures exported from sys-*.c */
+void sys_init __P((void));	/* Do system-dependent initialization */
+void sys_cleanup __P((void));	/* Restore system state before exiting */
+int  sys_check_options __P((void)); /* Check options specified */
+void sys_close __P((void));	/* Clean up in a child before execing */
+int  ppp_available __P((void));	/* Test whether ppp kernel support exists */
+int  get_pty __P((int *, int *, char *, int));	/* Get pty master/slave */
+int  open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
+int  tty_establish_ppp __P((int));  /* Turn serial port into a ppp interface */
+void tty_disestablish_ppp __P((int)); /* Restore port to normal operation */
+void generic_disestablish_ppp __P((int dev_fd)); /* Restore device setting */
+int  generic_establish_ppp __P((int dev_fd)); /* Make a ppp interface */
+void make_new_bundle __P((int, int, int, int)); /* Create new bundle */
+int  bundle_attach __P((int));	/* Attach link to existing bundle */
+void cfg_bundle __P((int, int, int, int)); /* Configure existing bundle */
+void destroy_bundle __P((void)); /* Tell driver to destroy bundle */
+void clean_check __P((void));	/* Check if line was 8-bit clean */
+void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
+void restore_tty __P((int));	/* Restore port's original parameters */
+void setdtr __P((int, int));	/* Raise or lower port's DTR line */
+void output __P((int, u_char *, int)); /* Output a PPP packet */
+void wait_input __P((struct timeval *));
+				/* Wait for input, with timeout */
+void add_fd __P((int));		/* Add fd to set to wait for */
+void remove_fd __P((int));	/* Remove fd from set to wait for */
+int  read_packet __P((u_char *)); /* Read PPP packet */
+int  get_loop_output __P((void)); /* Read pkts from loopback */
+void tty_send_config __P((int, u_int32_t, int, int));
+				/* Configure i/f transmit parameters */
+void tty_set_xaccm __P((ext_accm));
+				/* Set extended transmit ACCM */
+void tty_recv_config __P((int, u_int32_t, int, int));
+				/* Configure i/f receive parameters */
+int  ccp_test __P((int, u_char *, int, int));
+				/* Test support for compression scheme */
+void ccp_flags_set __P((int, int, int));
+				/* Set kernel CCP state */
+int  ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
+int  get_idle_time __P((int, struct ppp_idle *));
+				/* Find out how long link has been idle */
+int  get_ppp_stats __P((int, struct pppd_stats *));
+				/* Return link statistics */
+void netif_set_mtu __P((int, int)); /* Set PPP interface MTU */
+int  netif_get_mtu __P((int));      /* Get PPP interface MTU */
+int  sifvjcomp __P((int, int, int, int));
+				/* Configure VJ TCP header compression */
+int  sifup __P((int));		/* Configure i/f up for one protocol */
+int  sifnpmode __P((int u, int proto, enum NPmode mode));
+				/* Set mode for handling packets for proto */
+int  sifdown __P((int));	/* Configure i/f down for one protocol */
+int  sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
+				/* Configure IPv4 addresses for i/f */
+int  cifaddr __P((int, u_int32_t, u_int32_t));
+				/* Reset i/f IP addresses */
+#ifdef INET6
+int  sif6addr __P((int, eui64_t, eui64_t));
+				/* Configure IPv6 addresses for i/f */
+int  cif6addr __P((int, eui64_t, eui64_t));
+				/* Remove an IPv6 address from i/f */
+#endif
+int  sifdefaultroute __P((int, u_int32_t, u_int32_t));
+				/* Create default route through i/f */
+int  cifdefaultroute __P((int, u_int32_t, u_int32_t));
+				/* Delete default route through i/f */
+int  sifproxyarp __P((int, u_int32_t));
+				/* Add proxy ARP entry for peer */
+int  cifproxyarp __P((int, u_int32_t));
+				/* Delete proxy ARP entry for peer */
+u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
+int  lock __P((char *));	/* Create lock file for device */
+int  relock __P((int));		/* Rewrite lock file with new pid */
+void unlock __P((void));	/* Delete previously-created lock file */
+void logwtmp __P((const char *, const char *, const char *));
+				/* Write entry to wtmp file */
+int  get_host_seed __P((void));	/* Get host-dependent random number seed */
+int  have_route_to __P((u_int32_t)); /* Check if route to addr exists */
+#ifdef PPP_FILTER
+int  set_filters __P((struct bpf_program *pass, struct bpf_program *active));
+				/* Set filter programs in kernel */
+#endif
+#ifdef IPX_CHANGE
+int  sipxfaddr __P((int, unsigned long, unsigned char *));
+int  cipxfaddr __P((int));
+#endif
+int  get_if_hwaddr __P((u_char *addr, char *name));
+char *get_first_ethernet __P((void));
+
+/* Procedures exported from options.c */
+int setipaddr __P((char *, char **, int)); /* Set local/remote ip addresses */
+int  parse_args __P((int argc, char **argv));
+				/* Parse options from arguments given */
+int  options_from_file __P((char *filename, int must_exist, int check_prot,
+			    int privileged));
+				/* Parse options from an options file */
+int  options_from_user __P((void)); /* Parse options from user's .ppprc */
+int  options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
+int  options_from_list __P((struct wordlist *, int privileged));
+				/* Parse options from a wordlist */
+int  getword __P((FILE *f, char *word, int *newlinep, char *filename));
+				/* Read a word from a file */
+void option_error __P((char *fmt, ...));
+				/* Print an error message about an option */
+int int_option __P((char *, int *));
+				/* Simplified number_option for decimal ints */
+void add_options __P((option_t *)); /* Add extra options */
+void check_options __P((void));	/* check values after all options parsed */
+int  override_value __P((const char *, int, const char *));
+				/* override value if permitted by priority */
+void print_options __P((void (*) __P((void *, char *, ...)), void *));
+				/* print out values of all options */
+
+int parse_dotted_ip __P((char *, u_int32_t *));
+
+/*
+ * Hooks to enable plugins to change various things.
+ */
+extern int (*new_phase_hook) __P((int));
+extern int (*idle_time_hook) __P((struct ppp_idle *));
+extern int (*holdoff_hook) __P((void));
+extern int (*pap_check_hook) __P((void));
+extern int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
+				 struct wordlist **paddrs,
+				 struct wordlist **popts));
+extern void (*pap_logout_hook) __P((void));
+extern int (*pap_passwd_hook) __P((char *user, char *passwd));
+extern int (*allowed_address_hook) __P((u_int32_t addr));
+extern void (*ip_up_hook) __P((void));
+extern void (*ip_down_hook) __P((void));
+extern void (*ip_choose_hook) __P((u_int32_t *));
+
+extern int (*chap_check_hook) __P((void));
+extern int (*chap_passwd_hook) __P((char *user, char *passwd));
+
+/* Let a plugin snoop sent and received packets.  Useful for L2TP */
+extern void (*snoop_recv_hook) __P((unsigned char *p, int len));
+extern void (*snoop_send_hook) __P((unsigned char *p, int len));
+
+/*
+ * Inline versions of get/put char/short/long.
+ * Pointer is advanced; we assume that both arguments
+ * are lvalues and will already be in registers.
+ * cp MUST be u_char *.
+ */
+#define GETCHAR(c, cp) { \
+	(c) = *(cp)++; \
+}
+#define PUTCHAR(c, cp) { \
+	*(cp)++ = (u_char) (c); \
+}
+
+
+#define GETSHORT(s, cp) { \
+	(s) = *(cp)++ << 8; \
+	(s) |= *(cp)++; \
+}
+#define PUTSHORT(s, cp) { \
+	*(cp)++ = (u_char) ((s) >> 8); \
+	*(cp)++ = (u_char) (s); \
+}
+
+#define GETLONG(l, cp) { \
+	(l) = *(cp)++ << 8; \
+	(l) |= *(cp)++; (l) <<= 8; \
+	(l) |= *(cp)++; (l) <<= 8; \
+	(l) |= *(cp)++; \
+}
+#define PUTLONG(l, cp) { \
+	*(cp)++ = (u_char) ((l) >> 24); \
+	*(cp)++ = (u_char) ((l) >> 16); \
+	*(cp)++ = (u_char) ((l) >> 8); \
+	*(cp)++ = (u_char) (l); \
+}
+
+#define INCPTR(n, cp)	((cp) += (n))
+#define DECPTR(n, cp)	((cp) -= (n))
+
+/*
+ * System dependent definitions for user-level 4.3BSD UNIX implementation.
+ */
+
+#define TIMEOUT(r, f, t)	timeout((r), (f), (t), 0)
+#define UNTIMEOUT(r, f)		untimeout((r), (f))
+
+#define BCOPY(s, d, l)		memcpy(d, s, l)
+#define BZERO(s, n)		memset(s, 0, n)
+#define	BCMP(s1, s2, l)		memcmp(s1, s2, l)
+
+#define PRINTMSG(m, l)		{ info("Remote message: %0.*v", l, m); }
+
+/*
+ * MAKEHEADER - Add Header fields to a packet.
+ */
+#define MAKEHEADER(p, t) { \
+    PUTCHAR(PPP_ALLSTATIONS, p); \
+    PUTCHAR(PPP_UI, p); \
+    PUTSHORT(t, p); }
+
+/*
+ * Exit status values.
+ */
+#define EXIT_OK			0
+#define EXIT_FATAL_ERROR	1
+#define EXIT_OPTION_ERROR	2
+#define EXIT_NOT_ROOT		3
+#define EXIT_NO_KERNEL_SUPPORT	4
+#define EXIT_USER_REQUEST	5
+#define EXIT_LOCK_FAILED	6
+#define EXIT_OPEN_FAILED	7
+#define EXIT_CONNECT_FAILED	8
+#define EXIT_PTYCMD_FAILED	9
+#define EXIT_NEGOTIATION_FAILED	10
+#define EXIT_PEER_AUTH_FAILED	11
+#define EXIT_IDLE_TIMEOUT	12
+#define EXIT_CONNECT_TIME	13
+#define EXIT_CALLBACK		14
+#define EXIT_PEER_DEAD		15
+#define EXIT_HANGUP		16
+#define EXIT_LOOPBACK		17
+#define EXIT_INIT_FAILED	18
+#define EXIT_AUTH_TOPEER_FAILED	19
+#ifdef MAXOCTETS
+#define EXIT_TRAFFIC_LIMIT	20
+#endif
+#define EXIT_CNID_AUTH_FAILED	21
+
+/*
+ * Debug macros.  Slightly useful for finding bugs in pppd, not particularly
+ * useful for finding out why your connection isn't being established.
+ */
+#ifdef DEBUGALL
+#define DEBUGMAIN	1
+#define DEBUGFSM	1
+#define DEBUGLCP	1
+#define DEBUGIPCP	1
+#define DEBUGIPV6CP	1
+#define DEBUGUPAP	1
+#define DEBUGCHAP	1
+#endif
+
+#ifndef LOG_PPP			/* we use LOG_LOCAL2 for syslog by default */
+#if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
+  || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
+  || defined(DEBUGCHAP) || defined(DEBUG) || defined(DEBUGIPV6CP)
+#define LOG_PPP LOG_LOCAL2
+#else
+#define LOG_PPP LOG_DAEMON
+#endif
+#endif /* LOG_PPP */
+
+#ifdef DEBUGMAIN
+#define MAINDEBUG(x)	if (debug) dbglog x
+#else
+#define MAINDEBUG(x)
+#endif
+
+#ifdef DEBUGSYS
+#define SYSDEBUG(x)	if (debug) dbglog x
+#else
+#define SYSDEBUG(x)
+#endif
+
+#ifdef DEBUGFSM
+#define FSMDEBUG(x)	if (debug) dbglog x
+#else
+#define FSMDEBUG(x)
+#endif
+
+#ifdef DEBUGLCP
+#define LCPDEBUG(x)	if (debug) dbglog x
+#else
+#define LCPDEBUG(x)
+#endif
+
+#ifdef DEBUGIPCP
+#define IPCPDEBUG(x)	if (debug) dbglog x
+#else
+#define IPCPDEBUG(x)
+#endif
+
+#ifdef DEBUGIPV6CP
+#define IPV6CPDEBUG(x)  if (debug) dbglog x
+#else
+#define IPV6CPDEBUG(x)
+#endif
+
+#ifdef DEBUGUPAP
+#define UPAPDEBUG(x)	if (debug) dbglog x
+#else
+#define UPAPDEBUG(x)
+#endif
+
+#ifdef DEBUGCHAP
+#define CHAPDEBUG(x)	if (debug) dbglog x
+#else
+#define CHAPDEBUG(x)
+#endif
+
+#ifdef DEBUGIPXCP
+#define IPXCPDEBUG(x)	if (debug) dbglog x
+#else
+#define IPXCPDEBUG(x)
+#endif
+
+#ifndef SIGTYPE
+#if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
+#define SIGTYPE void
+#else
+#define SIGTYPE int
+#endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
+#endif /* SIGTYPE */
+
+#ifndef MIN
+#define MIN(a, b)	((a) < (b)? (a): (b))
+#endif
+#ifndef MAX
+#define MAX(a, b)	((a) > (b)? (a): (b))
+#endif
+
+#ifndef offsetof
+#define offsetof(type, member) ((size_t) &((type *)0)->member)
+#endif
+
+#endif /* __PPP_H__ */
diff --git a/pppd_plugin/src/pppd/sha1.h b/pppd_plugin/src/pppd/sha1.h
new file mode 100644
index 0000000..83f64df
--- /dev/null
+++ b/pppd_plugin/src/pppd/sha1.h
@@ -0,0 +1,31 @@
+/* sha1.h */
+
+/* If OpenSSL is in use, then use that version of SHA-1 */
+#ifdef OPENSSL
+#include <t_sha.h>
+#define __SHA1_INCLUDE_
+#endif
+
+#ifndef __SHA1_INCLUDE_
+
+#ifndef SHA1_SIGNATURE_SIZE
+#ifdef SHA_DIGESTSIZE
+#define SHA1_SIGNATURE_SIZE SHA_DIGESTSIZE
+#else
+#define SHA1_SIGNATURE_SIZE 20
+#endif
+#endif
+
+typedef struct {
+    u_int32_t state[5];
+    u_int32_t count[2];
+    unsigned char buffer[64];
+} SHA1_CTX;
+
+extern void SHA1_Init(SHA1_CTX *);
+extern void SHA1_Update(SHA1_CTX *, const unsigned char *, unsigned int);
+extern void SHA1_Final(unsigned char[SHA1_SIGNATURE_SIZE], SHA1_CTX *);
+
+#define __SHA1_INCLUDE_
+#endif /* __SHA1_INCLUDE_ */
+
diff --git a/pppd_plugin/src/pppd/spinlock.h b/pppd_plugin/src/pppd/spinlock.h
new file mode 100644
index 0000000..967fe37
--- /dev/null
+++ b/pppd_plugin/src/pppd/spinlock.h
@@ -0,0 +1,59 @@
+#ifndef __SPINLOCK_H__
+#define __SPINLOCK_H__
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "tdb.h"
+
+#ifdef USE_SPINLOCKS
+
+#define RWLOCK_BIAS 0x1000UL
+
+/* OS SPECIFIC */
+#define MAX_BUSY_LOOPS 1000
+#undef USE_SCHED_YIELD
+
+/* ARCH SPECIFIC */
+/* We should make sure these are padded to a cache line */
+#if defined(SPARC_SPINLOCKS)
+typedef volatile char spinlock_t;
+#elif defined(POWERPC_SPINLOCKS)
+typedef volatile unsigned long spinlock_t;
+#elif defined(INTEL_SPINLOCKS)
+typedef volatile int spinlock_t;
+#elif defined(MIPS_SPINLOCKS)
+typedef volatile unsigned long spinlock_t;
+#else
+#error Need to implement spinlock code in spinlock.h
+#endif
+
+typedef struct {
+	spinlock_t lock;
+	volatile int count;
+} tdb_rwlock_t;
+
+int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type);
+int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type);
+int tdb_create_rwlocks(int fd, unsigned int hash_size);
+int tdb_clear_spinlocks(TDB_CONTEXT *tdb);
+
+#define TDB_SPINLOCK_SIZE(hash_size) (((hash_size) + 1) * sizeof(tdb_rwlock_t))
+
+#else /* !USE_SPINLOCKS */
+#if 0
+#define tdb_create_rwlocks(fd, hash_size) 0
+#define tdb_spinlock(tdb, list, rw_type) (-1)
+#define tdb_spinunlock(tdb, list, rw_type) (-1)
+#else
+int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type);
+int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type);
+int tdb_create_rwlocks(int fd, unsigned int hash_size);
+#endif
+int tdb_clear_spinlocks(TDB_CONTEXT *tdb);
+#define TDB_SPINLOCK_SIZE(hash_size) 0
+
+#endif
+
+#endif
diff --git a/pppd_plugin/src/pppd/tdb.h b/pppd_plugin/src/pppd/tdb.h
new file mode 100644
index 0000000..153b6e9
--- /dev/null
+++ b/pppd_plugin/src/pppd/tdb.h
@@ -0,0 +1,164 @@
+#ifndef __TDB_H__
+#define __TDB_H__
+
+/* 
+   Unix SMB/CIFS implementation.
+   
+   trivial database library
+   
+   Copyright (C) Andrew Tridgell 1999-2004
+   
+     ** NOTE! The following LGPL license applies to the tdb
+     ** library. This does NOT imply that all of Samba is released
+     ** under the LGPL
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#ifndef PRINTF_ATTRIBUTE
+/** Use gcc attribute to check printf fns.  a1 is the 1-based index of
+ * the parameter containing the format, and a2 the index of the first
+ * argument. Note that some gcc 2.x versions don't handle this
+ * properly **/
+#if (__GNUC__ >= 3)
+#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
+#else
+#define PRINTF_ATTRIBUTE(a1, a2)
+#endif
+#endif
+
+/* flags to tdb_store() */
+#define TDB_REPLACE 1
+#define TDB_INSERT 2
+#define TDB_MODIFY 3
+
+/* flags for tdb_open() */
+#define TDB_DEFAULT 0 /* just a readability place holder */
+#define TDB_CLEAR_IF_FIRST 1
+#define TDB_INTERNAL 2 /* don't store on disk */
+#define TDB_NOLOCK   4 /* don't do any locking */
+#define TDB_NOMMAP   8 /* don't use mmap */
+#define TDB_CONVERT 16 /* convert endian (internal use) */
+#define TDB_BIGENDIAN 32 /* header is big-endian (internal use) */
+
+#define TDB_ERRCODE(code, ret) ((tdb->ecode = (code)), ret)
+
+/* error codes */
+enum TDB_ERROR {TDB_SUCCESS=0, TDB_ERR_CORRUPT, TDB_ERR_IO, TDB_ERR_LOCK, 
+		TDB_ERR_OOM, TDB_ERR_EXISTS, TDB_ERR_NOLOCK, TDB_ERR_LOCK_TIMEOUT,
+		TDB_ERR_NOEXIST};
+
+#ifndef u32
+#define u32 unsigned
+#endif
+
+typedef struct {
+	char *dptr;
+	size_t dsize;
+} TDB_DATA;
+
+typedef u32 tdb_len;
+typedef u32 tdb_off;
+
+/* this is stored at the front of every database */
+struct tdb_header {
+	char magic_food[32]; /* for /etc/magic */
+	u32 version; /* version of the code */
+	u32 hash_size; /* number of hash entries */
+	tdb_off rwlocks;
+	tdb_off reserved[31];
+};
+
+struct tdb_lock_type {
+	u32 count;
+	u32 ltype;
+};
+
+struct tdb_traverse_lock {
+	struct tdb_traverse_lock *next;
+	u32 off;
+	u32 hash;
+};
+
+/* this is the context structure that is returned from a db open */
+typedef struct tdb_context {
+	char *name; /* the name of the database */
+	void *map_ptr; /* where it is currently mapped */
+	int fd; /* open file descriptor for the database */
+	tdb_len map_size; /* how much space has been mapped */
+	int read_only; /* opened read-only */
+	struct tdb_lock_type *locked; /* array of chain locks */
+	enum TDB_ERROR ecode; /* error code for last tdb error */
+	struct tdb_header header; /* a cached copy of the header */
+	u32 flags; /* the flags passed to tdb_open */
+	struct tdb_traverse_lock travlocks; /* current traversal locks */
+	struct tdb_context *next; /* all tdbs to avoid multiple opens */
+	dev_t device;	/* uniquely identifies this tdb */
+	ino_t inode;	/* uniquely identifies this tdb */
+	void (*log_fn)(struct tdb_context *tdb, int level, const char *, ...) PRINTF_ATTRIBUTE(3,4); /* logging function */
+	u32 (*hash_fn)(TDB_DATA *key);
+	int open_flags; /* flags used in the open - needed by reopen */
+} TDB_CONTEXT;
+
+typedef int (*tdb_traverse_func)(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);
+typedef void (*tdb_log_func)(TDB_CONTEXT *, int , const char *, ...);
+typedef u32 (*tdb_hash_func)(TDB_DATA *key);
+
+TDB_CONTEXT *tdb_open(const char *name, int hash_size, int tdb_flags,
+		      int open_flags, mode_t mode);
+TDB_CONTEXT *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
+			 int open_flags, mode_t mode,
+			 tdb_log_func log_fn,
+			 tdb_hash_func hash_fn);
+
+int tdb_reopen(TDB_CONTEXT *tdb);
+int tdb_reopen_all(void);
+void tdb_logging_function(TDB_CONTEXT *tdb, tdb_log_func);
+enum TDB_ERROR tdb_error(TDB_CONTEXT *tdb);
+const char *tdb_errorstr(TDB_CONTEXT *tdb);
+TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key);
+int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key);
+int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag);
+int tdb_append(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA new_dbuf);
+int tdb_close(TDB_CONTEXT *tdb);
+TDB_DATA tdb_firstkey(TDB_CONTEXT *tdb);
+TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA key);
+int tdb_traverse(TDB_CONTEXT *tdb, tdb_traverse_func fn, void *);
+int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);
+int tdb_lockkeys(TDB_CONTEXT *tdb, u32 number, TDB_DATA keys[]);
+void tdb_unlockkeys(TDB_CONTEXT *tdb);
+int tdb_lockall(TDB_CONTEXT *tdb);
+void tdb_unlockall(TDB_CONTEXT *tdb);
+
+/* Low level locking functions: use with care */
+void tdb_set_lock_alarm(sig_atomic_t *palarm);
+int tdb_chainlock(TDB_CONTEXT *tdb, TDB_DATA key);
+int tdb_chainunlock(TDB_CONTEXT *tdb, TDB_DATA key);
+
+/* Debug functions. Not used in production. */
+void tdb_dump_all(TDB_CONTEXT *tdb);
+int tdb_printfreelist(TDB_CONTEXT *tdb);
+
+extern TDB_DATA tdb_null;
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif /* tdb.h */
diff --git a/pppd_plugin/src/pppd/upap.h b/pppd_plugin/src/pppd/upap.h
new file mode 100644
index 0000000..5cb59e9
--- /dev/null
+++ b/pppd_plugin/src/pppd/upap.h
@@ -0,0 +1,110 @@
+/*
+ * upap.h - User/Password Authentication Protocol definitions.
+ *
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: upap.h,v 1.8 2002/12/04 23:03:33 paulus Exp $
+ */
+
+/*
+ * Packet header = Code, id, length.
+ */
+#define UPAP_HEADERLEN	4
+
+
+/*
+ * UPAP codes.
+ */
+#define UPAP_AUTHREQ	1	/* Authenticate-Request */
+#define UPAP_AUTHACK	2	/* Authenticate-Ack */
+#define UPAP_AUTHNAK	3	/* Authenticate-Nak */
+
+
+/*
+ * Each interface is described by upap structure.
+ */
+typedef struct upap_state {
+    int us_unit;		/* Interface unit number */
+    char *us_user;		/* User */
+    int us_userlen;		/* User length */
+    char *us_passwd;		/* Password */
+    int us_passwdlen;		/* Password length */
+    int us_clientstate;		/* Client state */
+    int us_serverstate;		/* Server state */
+    u_char us_id;		/* Current id */
+    int us_timeouttime;		/* Timeout (seconds) for auth-req retrans. */
+    int us_transmits;		/* Number of auth-reqs sent */
+    int us_maxtransmits;	/* Maximum number of auth-reqs to send */
+    int us_reqtimeout;		/* Time to wait for auth-req from peer */
+} upap_state;
+
+
+/*
+ * Client states.
+ */
+#define UPAPCS_INITIAL	0	/* Connection down */
+#define UPAPCS_CLOSED	1	/* Connection up, haven't requested auth */
+#define UPAPCS_PENDING	2	/* Connection down, have requested auth */
+#define UPAPCS_AUTHREQ	3	/* We've sent an Authenticate-Request */
+#define UPAPCS_OPEN	4	/* We've received an Ack */
+#define UPAPCS_BADAUTH	5	/* We've received a Nak */
+
+/*
+ * Server states.
+ */
+#define UPAPSS_INITIAL	0	/* Connection down */
+#define UPAPSS_CLOSED	1	/* Connection up, haven't requested auth */
+#define UPAPSS_PENDING	2	/* Connection down, have requested auth */
+#define UPAPSS_LISTEN	3	/* Listening for an Authenticate */
+#define UPAPSS_OPEN	4	/* We've sent an Ack */
+#define UPAPSS_BADAUTH	5	/* We've sent a Nak */
+
+
+/*
+ * Timeouts.
+ */
+#define UPAP_DEFTIMEOUT	3	/* Timeout (seconds) for retransmitting req */
+#define UPAP_DEFREQTIME	30	/* Time to wait for auth-req from peer */
+
+extern upap_state upap[];
+
+void upap_authwithpeer __P((int, char *, char *));
+void upap_authpeer __P((int));
+
+extern struct protent pap_protent;
diff --git a/pppd_plugin/src/pptp.c b/pppd_plugin/src/pptp.c
new file mode 100644
index 0000000..79bb1d1
--- /dev/null
+++ b/pppd_plugin/src/pptp.c
@@ -0,0 +1,334 @@
+/***************************************************************************
+ *   Copyright (C) 2006 by Kozlov D.   *
+ *   xeb@mail.ru   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/un.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <signal.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <sys/ioctl.h>
+
+#include "pppd/pppd.h"
+#include "pppd/fsm.h"
+#include "pppd/lcp.h"
+#include "pppd/ipcp.h"
+#include "pppd/ccp.h"
+#include "pppd/pathnames.h"
+
+#include "pptp_callmgr.h"
+#include <net/if.h>
+#include <net/ethernet.h>
+#include "if_pppox.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+extern char** environ;
+
+char pppd_version[] = PPPD_VERSION;
+extern int new_style_driver;
+
+
+char *pptp_server = NULL;
+char *pptp_client = NULL;
+char *pptp_phone = NULL;
+int pptp_sock=-1;
+int pptp_timeout=100000;
+struct in_addr localbind = { INADDR_NONE };
+
+static int callmgr_sock;
+static int pptp_fd;
+int call_ID;
+
+//static struct in_addr get_ip_address(char *name);
+static int open_callmgr(int call_id,struct in_addr inetaddr, char *phonenr,int window);
+static void launch_callmgr(int call_is,struct in_addr inetaddr, char *phonenr,int window);
+static int get_call_id(int sock, pid_t gre, pid_t pppd, u_int16_t *peer_call_id);
+
+//static int pptp_devname_hook(char *cmd, char **argv, int doit);
+static option_t Options[] =
+{
+    { "pptp_server", o_string, &pptp_server,
+      "PPTP Server" },
+    { "pptp_client", o_string, &pptp_client,
+      "PPTP Client" },
+    { "pptp_sock",o_int, &pptp_sock,
+      "PPTP socket" },
+    { "pptp_phone", o_string, &pptp_phone,
+      "PPTP Phone number" },
+    { "pptp_timeout", o_int, &pptp_timeout,
+      "timeout for waiting reordered packets and acks"},
+    { NULL }
+};
+
+static int pptp_connect(void);
+//static void pptp_send_config(int mtu,u_int32_t asyncmap,int pcomp,int accomp);
+//static void pptp_recv_config(int mru,u_int32_t asyncmap,int pcomp,int accomp);
+static void pptp_disconnect(void);
+
+struct channel pptp_channel = {
+    options: Options,
+    //process_extra_options: &PPPOEDeviceOptions,
+    check_options: NULL,
+    connect: &pptp_connect,
+    disconnect: &pptp_disconnect,
+    establish_ppp: &generic_establish_ppp,
+    disestablish_ppp: &generic_disestablish_ppp,
+    //send_config: &pptp_send_config,
+    //recv_config: &pptp_recv_config,
+    close: NULL,
+    cleanup: NULL
+};
+
+static int pptp_start_server(void)
+{
+	pptp_fd=pptp_sock;
+	sprintf(ppp_devnam,"pptp (%s)",pptp_client);
+
+	return pptp_fd;
+}
+static int pptp_start_client(void)
+{
+	int len;
+	struct sockaddr_pppox src_addr,dst_addr;
+	struct hostent *hostinfo;
+
+	hostinfo=gethostbyname(pptp_server);
+  if (!hostinfo)
+	{
+		fatal("PPTP: Unknown host %s\n", pptp_server);
+		return -1;
+	}
+	dst_addr.sa_addr.pptp.sin_addr=*(struct in_addr*)hostinfo->h_addr;
+	{
+		int sock;
+		struct sockaddr_in addr;
+		len=sizeof(addr);
+		addr.sin_addr=dst_addr.sa_addr.pptp.sin_addr;
+		addr.sin_family=AF_INET;
+		addr.sin_port=htons(1700);
+		sock=socket(AF_INET,SOCK_DGRAM,0);
+		if (connect(sock,(struct sockaddr*)&addr,sizeof(addr)))
+		{
+			fatal("PPTP: connect failed (%s)\n",strerror(errno));
+			return -1;
+		}
+		getsockname(sock,(struct sockaddr*)&addr,&len);
+		src_addr.sa_addr.pptp.sin_addr=addr.sin_addr;
+		close(sock);
+	}
+	//info("PPTP: connect server=%s\n",inet_ntoa(conn.sin_addr));
+	//conn.loc_addr.s_addr=INADDR_NONE;
+	//conn.timeout=1;
+	//conn.window=pptp_window;
+
+	src_addr.sa_family=AF_PPPOX;
+	src_addr.sa_protocol=PX_PROTO_PPTP;
+	src_addr.sa_addr.pptp.call_id=0;
+
+	dst_addr.sa_family=AF_PPPOX;
+	dst_addr.sa_protocol=PX_PROTO_PPTP;
+	dst_addr.sa_addr.pptp.call_id=0;
+
+	pptp_fd=socket(AF_PPPOX,SOCK_STREAM,PX_PROTO_PPTP);
+	if (pptp_fd<0)
+	{
+		fatal("PPTP: failed to create PPTP socket (%s)\n",strerror(errno));
+		return -1;
+	}
+	if (setsockopt(pptp_fd,0,PPTP_SO_TIMEOUT,&pptp_timeout,sizeof(pptp_timeout)))
+		warn("PPTP: failed to setsockopt PPTP_SO_TIMEOUT (%s)\n",strerror(errno));
+	if (bind(pptp_fd,(struct sockaddr*)&src_addr,sizeof(src_addr)))
+	{
+		fatal("PPTP: failed to bind PPTP socket (%s)\n",strerror(errno));
+		return -1;
+	}
+	len=sizeof(src_addr);
+	getsockname(pptp_fd,(struct sockaddr*)&src_addr,&len);
+	call_ID=src_addr.sa_addr.pptp.call_id;
+
+  do {
+        /*
+         * Open connection to call manager (Launch call manager if necessary.)
+         */
+        callmgr_sock = open_callmgr(src_addr.sa_addr.pptp.call_id,dst_addr.sa_addr.pptp.sin_addr, pptp_phone,50);
+        /* Exchange PIDs, get call ID */
+    } while (get_call_id(callmgr_sock, getpid(), getpid(), &dst_addr.sa_addr.pptp.call_id) < 0);
+
+	if (connect(pptp_fd,(struct sockaddr*)&dst_addr,sizeof(dst_addr)))
+	{
+		fatal("PPTP: failed to connect PPTP socket (%s)\n",strerror(errno));
+		return -1;
+	}
+
+	sprintf(ppp_devnam,"pptp (%s)",pptp_server);
+
+	return pptp_fd;
+}
+static int pptp_connect(void)
+{
+	if ((!pptp_server && !pptp_client) || (pptp_server && pptp_client))
+	{
+		fatal("PPTP: unknown mode (you must specify pptp_server or pptp_client option)");
+		return -1;
+	}
+
+	if (pptp_server) return pptp_start_client();
+	return pptp_start_server();
+}
+
+static void pptp_disconnect(void)
+{
+	close(pptp_fd);
+}
+
+static int open_callmgr(int call_id,struct in_addr inetaddr, char *phonenr,int window)
+{
+    /* Try to open unix domain socket to call manager. */
+    struct sockaddr_un where;
+    const int NUM_TRIES = 3;
+    int i, fd;
+    pid_t pid;
+    int status;
+    /* Open socket */
+    if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
+    {
+        fatal("Could not create unix domain socket: %s", strerror(errno));
+    }
+    /* Make address */
+    callmgr_name_unixsock(&where, inetaddr, localbind);
+    for (i = 0; i < NUM_TRIES; i++)
+    {
+        if (connect(fd, (struct sockaddr *) &where, sizeof(where)) < 0)
+        {
+            /* couldn't connect.  We'll have to launch this guy. */
+
+            unlink (where.sun_path);
+
+            /* fork and launch call manager process */
+            switch (pid = fork())
+            {
+                case -1: /* failure */
+                    fatal("fork() to launch call manager failed.");
+                case 0: /* child */
+                {
+                    close (fd);
+                    //close(pptp_fd);
+                    /* close the pty and gre in the call manager */
+                   // close(pty_fd);
+                    //close(gre_fd);
+                    launch_callmgr(call_id,inetaddr, phonenr,window);
+                }
+                default: /* parent */
+                    waitpid(pid, &status, 0);
+                    if (status!= 0)
+                       fatal("Call manager exited with error %d", status);
+                    break;
+            }
+            sleep(1);
+        }
+        else return fd;
+    }
+    close(fd);
+    fatal("Could not launch call manager after %d tries.", i);
+    return -1;   /* make gcc happy */
+}
+
+/*** call the call manager main ***********************************************/
+static void launch_callmgr(int call_id,struct in_addr inetaddr, char *phonenr,int window)
+{
+			char win[10];
+			char call[10];
+      char *my_argv[9] = { "pptp", inet_ntoa(inetaddr), "--call_id",call,"--phone",phonenr,"--window",win,NULL };
+      char buf[128];
+      sprintf(win,"%u",window);
+      sprintf(call,"%u",call_id);
+      snprintf(buf, sizeof(buf), "pptp: call manager for %s", my_argv[1]);
+      //inststr(argc, argv, envp, buf);
+      exit(callmgr_main(8, my_argv, environ));
+}
+
+/*** exchange data with the call manager  *************************************/
+/* XXX need better error checking XXX */
+static int get_call_id(int sock, pid_t gre, pid_t pppd,
+		u_int16_t *peer_call_id)
+{
+    u_int16_t m_call_id, m_peer_call_id;
+    /* write pid's to socket */
+    /* don't bother with network byte order, because pid's are meaningless
+     * outside the local host.
+     */
+    int rc;
+    rc = write(sock, &gre, sizeof(gre));
+    if (rc != sizeof(gre))
+        return -1;
+    rc = write(sock, &pppd, sizeof(pppd));
+    if (rc != sizeof(pppd))
+        return -1;
+    rc = read(sock,  &m_call_id, sizeof(m_call_id));
+    if (rc != sizeof(m_call_id))
+        return -1;
+    rc = read(sock,  &m_peer_call_id, sizeof(m_peer_call_id));
+    if (rc != sizeof(m_peer_call_id))
+        return -1;
+    /*
+     * XXX FIXME ... DO ERROR CHECKING & TIME-OUTS XXX
+     * (Rhialto: I am assuming for now that timeouts are not relevant
+     * here, because the read and write calls would return -1 (fail) when
+     * the peer goes away during the process. We know it is (or was)
+     * running because the connect() call succeeded.)
+     * (James: on the other hand, if the route to the peer goes away, we
+     * wouldn't get told by read() or write() for quite some time.)
+     */
+    *peer_call_id = m_peer_call_id;
+    return 0;
+}
+
+void plugin_init(void)
+{
+    /*if (!ppp_available() && !new_style_driver)
+    {
+				fatal("Linux kernel does not support PPP -- are you running 2.4.x?");
+    }*/
+
+    add_options(Options);
+
+    info("PPTP plugin version %s compiled for pppd-%s, linux-%s",
+	 VERSION, PPPD_VERSION,KERNELVERSION);
+
+    the_channel = &pptp_channel;
+    modem = 0;
+}
+
diff --git a/pppd_plugin/src/pptp_callmgr.c b/pppd_plugin/src/pptp_callmgr.c
new file mode 100644
index 0000000..988e717
--- /dev/null
+++ b/pppd_plugin/src/pptp_callmgr.c
@@ -0,0 +1,403 @@
+/* pptp_callmgr.c ... Call manager for PPTP connections.
+ *                    Handles TCP port 1723 protocol.
+ *                    C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_callmgr.c,v 1.20 2005/03/31 07:42:39 quozl Exp $
+ */
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <setjmp.h>
+#include <stdio.h>
+#include <errno.h>
+#include "pptp_callmgr.h"
+#include "pptp_ctrl.h"
+#include "pptp_msg.h"
+#include "dirutil.h"
+#include "vector.h"
+#include "util.h"
+
+extern struct in_addr localbind; /* from pptp.c */
+extern int call_ID;
+
+int open_inetsock(struct in_addr inetaddr);
+int open_unixsock(struct in_addr inetaddr);
+void close_inetsock(int fd, struct in_addr inetaddr);
+void close_unixsock(int fd, struct in_addr inetaddr);
+
+sigjmp_buf callmgr_env;
+
+void callmgr_sighandler(int sig) {
+    /* TODO: according to signal(2), siglongjmp() is unsafe used here */
+    siglongjmp (callmgr_env, 1);
+}
+
+void callmgr_do_nothing(int sig) {
+    /* do nothing signal handler */
+}
+
+struct local_callinfo {
+    int unix_sock;
+    pid_t pid[2];
+};
+
+struct local_conninfo {
+    VECTOR * call_list;
+    fd_set * call_set;
+};
+
+/* Call callback */
+void call_callback(PPTP_CONN *conn, PPTP_CALL *call, enum call_state state)
+{
+    struct local_callinfo *lci;
+    struct local_conninfo *conninfo;
+    u_int16_t call_id[2];
+    switch(state) {
+        case CALL_OPEN_DONE:
+            /* okey dokey.  This means that the call_id and peer_call_id are
+             * now valid, so lets send them on to our friends who requested
+             * this call.  */
+            lci = pptp_call_closure_get(conn, call); assert(lci != NULL);
+            pptp_call_get_ids(conn, call, &call_id[0], &call_id[1]);
+            write(lci->unix_sock, &call_id, sizeof(call_id));
+            /* Our duty to the fatherland is now complete. */
+            break;
+        case CALL_OPEN_FAIL:
+        case CALL_CLOSE_RQST:
+        case CALL_CLOSE_DONE:
+            /* don't need to do anything here, except make sure tables
+             * are sync'ed */
+            log("Closing connection (call state)");
+            conninfo = pptp_conn_closure_get(conn);
+            lci = pptp_call_closure_get(conn, call);
+            assert(lci != NULL && conninfo != NULL);
+            if (vector_contains(conninfo->call_list, lci->unix_sock)) {
+                vector_remove(conninfo->call_list, lci->unix_sock);
+                close(lci->unix_sock);
+                FD_CLR(lci->unix_sock, conninfo->call_set);
+                if(lci->pid[0] > 1) kill(lci->pid[0], SIGTERM);
+                if(lci->pid[1] > 1) kill(lci->pid[1], SIGTERM);
+            }
+            break;
+        default:
+            log("Unhandled call callback state [%d].", (int) state);
+            break;
+    }
+}
+
+/******************************************************************************
+ * NOTE ABOUT 'VOLATILE':
+ * several variables here get a volatile qualifier to silence warnings
+ * from older (before 3.0) gccs. if the longjmp stuff is removed,
+ * the volatile qualifiers should be removed as well.
+ *****************************************************************************/
+
+/*** Call Manager *************************************************************/
+int callmgr_main(int argc, char **argv, char **envp)
+{
+    struct in_addr inetaddr;
+    int inet_sock, unix_sock;
+    fd_set call_set;
+    PPTP_CONN * conn;
+    VECTOR * call_list;
+    int max_fd = 0;
+    volatile int first = 1;
+    int retval;
+    int i;
+    char * volatile phonenr=NULL;
+    int volatile window=10;
+    //int volatile call_id=0;
+    /* Step 0: Check arguments */
+    if (argc < 2)
+        fatal("Usage: %s ip.add.ress.here [--phone <phone number>]", argv[0]);
+    //phonenr = argc == 3 ? argv[2] : NULL;
+    for(i=2; i<argc; i++)
+    {
+    	//log("%s",argv[i]);
+    	if (strcmp(argv[i],"--phone")==0 && i+1<argc) phonenr=argv[++i];
+    	else if (strcmp(argv[i],"--window")==0 && i+1<argc) window=atoi(argv[++i]);
+    	else if (strcmp(argv[i],"--call_id")==0 && i+1<argc) call_ID=atoi(argv[++i]);
+    }
+    if (inet_aton(argv[1], &inetaddr) == 0)
+        fatal("Invalid IP address: %s", argv[1]);
+     log("IP: %s\n",inet_ntoa(inetaddr));
+    /* Step 1: Open sockets. */
+    if ((inet_sock = open_inetsock(inetaddr)) < 0)
+        fatal("Could not open control connection to %s", argv[1]);
+    log("control connection");
+    if ((unix_sock = open_unixsock(inetaddr)) < 0)
+        fatal("Could not open unix socket for %s", argv[1]);
+    /* Step 1b: FORK and return status to calling process. */
+    log("unix_sock");
+
+    switch (fork()) {
+        case 0: /* child. stick around. */
+            break;
+        case -1: /* failure.  Fatal. */
+            fatal("Could not fork.");
+        default: /* Parent. Return status to caller. */
+            exit(0);
+    }
+    /* re-open stderr as /dev/null to release it */
+    file2fd("/dev/null", "wb", STDERR_FILENO);
+    /* Step 1c: Clean up unix socket on TERM */
+    if (sigsetjmp(callmgr_env, 1) != 0)
+        goto cleanup;
+    signal(SIGINT, callmgr_sighandler);
+    signal(SIGTERM, callmgr_sighandler);
+    signal(SIGPIPE, callmgr_do_nothing);
+    signal(SIGUSR1, callmgr_do_nothing); /* signal state change
+                                            wake up accept */
+    /* Step 2: Open control connection and register callback */
+    if ((conn = pptp_conn_open(inet_sock, 1, NULL/* callback */)) == NULL) {
+        close(unix_sock); close(inet_sock); fatal("Could not open connection.");
+    }
+    FD_ZERO(&call_set);
+    call_list = vector_create();
+    {
+        struct local_conninfo *conninfo = malloc(sizeof(*conninfo));
+        if (conninfo == NULL) {
+            close(unix_sock); close(inet_sock); fatal("No memory.");
+        }
+        conninfo->call_list = call_list;
+        conninfo->call_set  = &call_set;
+        pptp_conn_closure_put(conn, conninfo);
+    }
+    if (sigsetjmp(callmgr_env, 1) != 0) goto shutdown;
+    /* Step 3: Get FD_SETs */
+    max_fd = unix_sock;
+    do {
+        int rc;
+        fd_set read_set = call_set, write_set;
+        FD_ZERO (&write_set);
+        if (pptp_conn_established(conn)) {
+	  FD_SET (unix_sock, &read_set);
+	  if (unix_sock > max_fd) max_fd = unix_sock;
+	}
+        pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+        for (; max_fd > 0 ; max_fd--) {
+            if (FD_ISSET (max_fd, &read_set) ||
+                    FD_ISSET (max_fd, &write_set))
+                break;
+        }
+        /* Step 4: Wait on INET or UNIX event */
+        if ((rc = select(max_fd + 1, &read_set, &write_set, NULL, NULL)) <0) {
+	  if (errno == EBADF) break;
+	  /* a signal or somesuch. */
+	  continue;
+	}
+        /* Step 5a: Handle INET events */
+        rc = pptp_dispatch(conn, &read_set, &write_set);
+	if (rc < 0)
+	    break;
+        /* Step 5b: Handle new connection to UNIX socket */
+        if (FD_ISSET(unix_sock, &read_set)) {
+            /* New call! */
+            struct sockaddr_un from;
+            int len = sizeof(from);
+            PPTP_CALL * call;
+            struct local_callinfo *lci;
+            int s;
+            /* Accept the socket */
+            FD_CLR (unix_sock, &read_set);
+            if ((s = accept(unix_sock, (struct sockaddr *) &from, &len)) < 0) {
+                warn("Socket not accepted: %s", strerror(errno));
+                goto skip_accept;
+            }
+            /* Allocate memory for local call information structure. */
+            if ((lci = malloc(sizeof(*lci))) == NULL) {
+                warn("Out of memory."); close(s); goto skip_accept;
+            }
+            lci->unix_sock = s;
+            /* Give the initiator time to write the PIDs while we open
+             * the call */
+            call = pptp_call_open(conn, call_ID,call_callback, phonenr,window);
+            /* Read and store the associated pids */
+            read(s, &lci->pid[0], sizeof(lci->pid[0]));
+            read(s, &lci->pid[1], sizeof(lci->pid[1]));
+            /* associate the local information with the call */
+            pptp_call_closure_put(conn, call, (void *) lci);
+            /* The rest is done on callback. */
+            /* Keep alive; wait for close */
+            retval = vector_insert(call_list, s, call); assert(retval);
+            if (s > max_fd) max_fd = s;
+            FD_SET(s, &call_set);
+            first = 0;
+        }
+skip_accept: /* Step 5c: Handle socket close */
+        for (i = 0; i < max_fd + 1; i++)
+            if (FD_ISSET(i, &read_set)) {
+                /* close it */
+                PPTP_CALL * call;
+                retval = vector_search(call_list, i, &call);
+                if (retval) {
+                    struct local_callinfo *lci =
+                        pptp_call_closure_get(conn, call);
+                    log("Closing connection (unhandled)");
+                    if(lci->pid[0] > 1) kill(lci->pid[0], SIGTERM);
+                    if(lci->pid[1] > 1) kill(lci->pid[1], SIGTERM);
+                    free(lci);
+                    /* soft shutdown.  Callback will do hard shutdown later */
+                    pptp_call_close(conn, call);
+                    vector_remove(call_list, i);
+                }
+                FD_CLR(i, &call_set);
+                close(i);
+            }
+    } while (vector_size(call_list) > 0 || first);
+shutdown:
+    {
+        int rc;
+        fd_set read_set, write_set;
+        struct timeval tv;
+	signal(SIGINT, callmgr_do_nothing);
+	signal(SIGTERM, callmgr_do_nothing);
+        /* warn("Shutdown"); */
+        /* kill all open calls */
+        for (i = 0; i < vector_size(call_list); i++) {
+            PPTP_CALL *call = vector_get_Nth(call_list, i);
+            struct local_callinfo *lci = pptp_call_closure_get(conn, call);
+            log("Closing connection (shutdown)");
+            pptp_call_close(conn, call);
+            if(lci->pid[0] > 1) kill(lci->pid[0], SIGTERM);
+            if(lci->pid[1] > 1) kill(lci->pid[1], SIGTERM);
+        }
+        /* attempt to dispatch these messages */
+        FD_ZERO(&read_set);
+        FD_ZERO(&write_set);
+        pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+	tv.tv_sec = 0;
+	tv.tv_usec = 0;
+	select(max_fd + 1, &read_set, &write_set, NULL, &tv);
+        rc = pptp_dispatch(conn, &read_set, &write_set);
+	if (rc > 0) {
+	  /* wait for a respond, a timeout because there might not be one */
+	  FD_ZERO(&read_set);
+	  FD_ZERO(&write_set);
+	  pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+	  tv.tv_sec = 2;
+	  tv.tv_usec = 0;
+	  select(max_fd + 1, &read_set, &write_set, NULL, &tv);
+	  rc = pptp_dispatch(conn, &read_set, &write_set);
+	  if (rc > 0) {
+	    if (i > 0) sleep(2);
+	    /* no more open calls.  Close the connection. */
+	    pptp_conn_close(conn, PPTP_STOP_LOCAL_SHUTDOWN);
+	    /* wait for a respond, a timeout because there might not be one */
+	    FD_ZERO(&read_set);
+	    FD_ZERO(&write_set);
+	    pptp_fd_set(conn, &read_set, &write_set, &max_fd);
+	    tv.tv_sec = 2;
+	    tv.tv_usec = 0;
+	    select(max_fd + 1, &read_set, &write_set, NULL, &tv);
+	    pptp_dispatch(conn, &read_set, &write_set);
+	    if (rc > 0) sleep(2);
+	  }
+	}
+        /* with extreme prejudice */
+        pptp_conn_destroy(conn);
+        vector_destroy(call_list);
+    }
+cleanup:
+    signal(SIGINT, callmgr_do_nothing);
+    signal(SIGTERM, callmgr_do_nothing);
+    close_inetsock(inet_sock, inetaddr);
+    close_unixsock(unix_sock, inetaddr);
+    return 0;
+}
+
+/*** open_inetsock ************************************************************/
+int open_inetsock(struct in_addr inetaddr)
+{
+    struct sockaddr_in dest, src;
+    int s;
+    dest.sin_family = AF_INET;
+    dest.sin_port   = htons(PPTP_PORT);
+    dest.sin_addr   = inetaddr;
+    if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        warn("socket: %s", strerror(errno));
+        return s;
+    }
+    if (localbind.s_addr != INADDR_NONE) {
+        bzero(&src, sizeof(src));
+        src.sin_family = AF_INET;
+        src.sin_addr   = localbind;
+        if (bind(s, (struct sockaddr *) &src, sizeof(src)) != 0) {
+            warn("bind: %s", strerror(errno));
+            close(s); return -1;
+        }
+    }
+    if (connect(s, (struct sockaddr *) &dest, sizeof(dest)) < 0) {
+        warn("connect: %s", strerror(errno));
+        close(s); return -1;
+    }
+    return s;
+}
+
+/*** open_unixsock ************************************************************/
+int open_unixsock(struct in_addr inetaddr)
+{
+    struct sockaddr_un where;
+    struct stat st;
+    char *dir;
+    int s;
+    if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+        warn("socket: %s", strerror(errno));
+        return s;
+    }
+    callmgr_name_unixsock( &where, inetaddr, localbind);
+    if (stat(where.sun_path, &st) >= 0)
+    {
+        warn("Call manager for %s is already running.", inet_ntoa(inetaddr));
+        close(s); return -1;
+    }
+   /* Make sure path is valid. */
+    dir = dirnamex(where.sun_path);
+    if (!make_valid_path(dir, 0770))
+        fatal("Could not make path to %s: %s", where.sun_path, strerror(errno));
+    free(dir);
+    if (bind(s, (struct sockaddr *) &where, sizeof(where)) < 0) {
+        warn("bind: %s", strerror(errno));
+        close(s); return -1;
+    }
+    chmod(where.sun_path, 0777);
+    listen(s, 127);
+    return s;
+}
+
+/*** close_inetsock ***********************************************************/
+void close_inetsock(int fd, struct in_addr inetaddr)
+{
+    close(fd);
+}
+
+/*** close_unixsock ***********************************************************/
+void close_unixsock(int fd, struct in_addr inetaddr)
+{
+    struct sockaddr_un where;
+    close(fd);
+    callmgr_name_unixsock(&where, inetaddr, localbind);
+    unlink(where.sun_path);
+}
+
+/*** make a unix socket address ***********************************************/
+void callmgr_name_unixsock(struct sockaddr_un *where,
+			   struct in_addr inetaddr,
+			   struct in_addr localbind)
+{
+    char localaddr[16], remoteaddr[16];
+    where->sun_family = AF_UNIX;
+    strncpy(localaddr,  inet_ntoa(localbind), 16);
+    strncpy(remoteaddr, inet_ntoa(inetaddr),  16);
+    snprintf(where->sun_path, sizeof(where->sun_path),
+            PPTP_SOCKET_PREFIX "%s:%i", remoteaddr,call_ID);
+}
diff --git a/pppd_plugin/src/pptp_callmgr.h b/pppd_plugin/src/pptp_callmgr.h
new file mode 100644
index 0000000..d7bc2d6
--- /dev/null
+++ b/pppd_plugin/src/pptp_callmgr.h
@@ -0,0 +1,13 @@
+/* pptp_callmgr.h ... Call manager for PPTP connections.
+ *                    Handles TCP port 1723 protocol.
+ *                    C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_callmgr.h,v 1.3 2003/02/17 00:22:17 quozl Exp $
+ */
+
+#define PPTP_SOCKET_PREFIX "/var/run/pptp/"
+
+int callmgr_main(int argc, char**argv, char**envp);
+void callmgr_name_unixsock(struct sockaddr_un *where,
+			   struct in_addr inetaddr,
+			   struct in_addr localbind);
diff --git a/pppd_plugin/src/pptp_ctrl.c b/pppd_plugin/src/pptp_ctrl.c
new file mode 100644
index 0000000..1bab3f9
--- /dev/null
+++ b/pppd_plugin/src/pptp_ctrl.c
@@ -0,0 +1,1077 @@
+/* pptp_ctrl.c ... handle PPTP control connection.
+ *                 C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_ctrl.c,v 1.31 2005/03/31 07:42:39 quozl Exp $
+ */
+
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <signal.h>
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include "pptp_msg.h"
+#include "pptp_ctrl.h"
+#include "pptp_options.h"
+#include "vector.h"
+#include "util.h"
+#include "pptp_quirks.h"
+
+/* BECAUSE OF SIGNAL LIMITATIONS, EACH PROCESS CAN ONLY MANAGE ONE
+ * CONNECTION.  SO THIS 'PPTP_CONN' STRUCTURE IS A BIT MISLEADING.
+ * WE'LL KEEP CONNECTION-SPECIFIC INFORMATION IN THERE ANYWAY (AS
+ * OPPOSED TO USING GLOBAL VARIABLES), BUT BEWARE THAT THE ENTIRE
+ * UNIX SIGNAL-HANDLING SEMANTICS WOULD HAVE TO CHANGE (OR THE
+ * TIME-OUT CODE DRASTICALLY REWRITTEN) BEFORE YOU COULD DO A
+ * PPTP_CONN_OPEN MORE THAN ONCE PER PROCESS AND GET AWAY WITH IT.
+ */
+
+/* This structure contains connection-specific information that the
+ * signal handler needs to see.  Thus, it needs to be in a global
+ * variable.  If you end up using pthreads or something (why not
+ * just processes?), this would have to be placed in a thread-specific
+ * data area, using pthread_get|set_specific, etc., so I've
+ * conveniently encapsulated it for you.
+ * [linux threads will have to support thread-specific signals
+ *  before this would work at all, which, as of this writing
+ *  (linux-threads v0.6, linux kernel 2.1.72), it does not.]
+ */
+
+/* Globals */
+
+/* control the number of times echo packets will be logged */
+static int nlogecho = 10;
+
+static struct thread_specific {
+    struct sigaction old_sigaction; /* evil signals */
+    PPTP_CONN * conn;
+} global;
+
+#define INITIAL_BUFSIZE 512 /* initial i/o buffer size. */
+
+struct PPTP_CONN {
+    int inet_sock;
+    /* Connection States */
+    enum {
+        CONN_IDLE, CONN_WAIT_CTL_REPLY, CONN_WAIT_STOP_REPLY, CONN_ESTABLISHED
+    } conn_state; /* on startup: CONN_IDLE */
+    /* Keep-alive states */
+    enum {
+        KA_NONE, KA_OUTSTANDING
+    } ka_state;  /* on startup: KA_NONE */
+    /* Keep-alive ID; monotonically increasing (watch wrap-around!) */
+    u_int32_t ka_id; /* on startup: 1 */
+    /* Other properties. */
+    u_int16_t version;
+    u_int16_t firmware_rev;
+    u_int8_t  hostname[64], vendor[64];
+    /* XXX these are only PNS properties, currently XXX */
+    /* Call assignment information. */
+    u_int16_t call_serial_number;
+    VECTOR *call;
+    void * closure;
+    pptp_conn_cb callback;
+    /******* IO buffers ******/
+    char * read_buffer, *write_buffer;
+    size_t read_alloc,   write_alloc;
+    size_t read_size,    write_size;
+};
+
+struct PPTP_CALL {
+    /* Call properties */
+    enum {
+        PPTP_CALL_PAC, PPTP_CALL_PNS
+    } call_type;
+    union {
+        enum pptp_pac_state {
+            PAC_IDLE, PAC_WAIT_REPLY, PAC_ESTABLISHED, PAC_WAIT_CS_ANS
+        } pac;
+        enum pptp_pns_state {
+            PNS_IDLE, PNS_WAIT_REPLY, PNS_ESTABLISHED, PNS_WAIT_DISCONNECT
+        } pns;
+    } state;
+    u_int16_t call_id, peer_call_id;
+    u_int16_t sernum;
+    u_int32_t speed;
+    /* For user data: */
+    pptp_call_cb callback;
+    void * closure;
+};
+
+
+/* PPTP error codes: ----------------------------------------------*/
+
+/* (General Error Codes) */
+static const struct {
+    const char *name, *desc;
+} pptp_general_errors[] = {
+#define PPTP_GENERAL_ERROR_NONE                 0
+    { "(None)", "No general error" },
+#define PPTP_GENERAL_ERROR_NOT_CONNECTED        1
+    { "(Not-Connected)", "No control connection exists yet for this "
+        "PAC-PNS pair" },
+#define PPTP_GENERAL_ERROR_BAD_FORMAT           2
+    { "(Bad-Format)", "Length is wrong or Magic Cookie value is incorrect" },
+#define PPTP_GENERAL_ERROR_BAD_VALUE            3
+    { "(Bad-Value)", "One of the field values was out of range or "
+            "reserved field was non-zero" },
+#define PPTP_GENERAL_ERROR_NO_RESOURCE          4
+    { "(No-Resource)", "Insufficient resources to handle this command now" },
+#define PPTP_GENERAL_ERROR_BAD_CALLID           5
+    { "(Bad-Call ID)", "The Call ID is invalid in this context" },
+#define PPTP_GENERAL_ERROR_PAC_ERROR            6
+    { "(PAC-Error)", "A generic vendor-specific error occured in the PAC" }
+};
+
+#define  MAX_GENERAL_ERROR ( sizeof(pptp_general_errors) / \
+        sizeof(pptp_general_errors[0]) - 1)
+
+/* Outgoing Call Reply Result Codes */
+static const char *pptp_out_call_reply_result[] = {
+/* 0 */	"Unknown Result Code",
+/* 1 */	"Connected",
+/* 2 */	"General Error",
+/* 3 */	"No Carrier Detected",
+/* 4 */	"Busy Signal",
+/* 5 */	"No Dial Tone",
+/* 6 */	"Time Out",
+/* 7 */	"Not Accepted, Call is administratively prohibited" };
+
+#define MAX_OUT_CALL_REPLY_RESULT 7
+
+/* Call Disconnect Notify  Result Codes */
+static const char *pptp_call_disc_ntfy[] = {
+/* 0 */	"Unknown Result Code",
+/* 1 */	"Lost Carrier",
+/* 2 */	"General Error",
+/* 3 */	"Administrative Shutdown",
+/* 4 */	"(your) Request" };
+
+#define MAX_CALL_DISC_NTFY 4
+
+/* Call Disconnect Notify  Result Codes */
+static const char *pptp_start_ctrl_conn_rply[] = {
+/* 0 */	"Unknown Result Code",
+/* 1 */	"Successful Channel Establishment",
+/* 2 */	"General Error",
+/* 3 */	"Command Channel Already Exists",
+/* 4 */	"Requester is not Authorized" };
+
+#define MAX_START_CTRL_CONN_REPLY 4
+
+/* timing options */
+int idle_wait = PPTP_TIMEOUT;
+int max_echo_wait = PPTP_TIMEOUT;
+
+/* Local prototypes */
+static void pptp_reset_timer(void);
+static void pptp_handle_timer();
+/* Write/read as much as we can without blocking. */
+int pptp_write_some(PPTP_CONN * conn);
+int pptp_read_some(PPTP_CONN * conn);
+/* Make valid packets from read_buffer */
+int pptp_make_packet(PPTP_CONN * conn, void **buf, size_t *size);
+/* Add packet to write_buffer */
+int pptp_send_ctrl_packet(PPTP_CONN * conn, void * buffer, size_t size);
+/* Dispatch packets (general) */
+int pptp_dispatch_packet(PPTP_CONN * conn, void * buffer, size_t size);
+/* Dispatch packets (control messages) */
+int ctrlp_disp(PPTP_CONN * conn, void * buffer, size_t size);
+/* Set link info, for pptp servers that need it.
+   this is a noop, unless the user specified a quirk and
+   there's a set_link hook defined in the quirks table
+   for that quirk */
+void pptp_set_link(PPTP_CONN * conn, int peer_call_id);
+
+/*** log error information in control packets *********************************/
+static void ctrlp_error( int result, int error, int cause,
+        const char *result_text[], int max_result)
+{
+    if( cause >= 0)
+        log("Result code is %d '%s'. Error code is %d, Cause code is %d",
+                result, result_text[result <= max_result ?  result : 0], error,
+                cause );
+    else
+        log("Reply result code is %d '%s'. Error code is %d",
+                result, result_text[result <= max_result ?  result : 0], error);
+    if ((error > 0) && (error <= MAX_GENERAL_ERROR)){
+        if( result != PPTP_RESULT_GENERAL_ERROR )
+            log("Result code is something else then \"general error\", "
+                    "so the following error is probably bogus.");
+        log("Error is '%s', Error message: '%s'",
+                pptp_general_errors[error].name,
+                pptp_general_errors[error].desc);
+    }
+}
+
+static const char *ctrl_msg_types[] = {
+         "invalid control message type",
+/*         (Control Connection Management) */
+         "Start-Control-Connection-Request",            /* 1 */
+         "Start-Control-Connection-Reply",              /* 2 */
+         "Stop-Control-Connection-Request",             /* 3 */
+         "Stop-Control-Connection-Reply",               /* 4 */
+         "Echo-Request",                                /* 5 */
+         "Echo-Reply",                                  /* 6 */
+/*         (Call Management) */
+         "Outgoing-Call-Request",                       /* 7 */
+         "Outgoing-Call-Reply",                         /* 8 */
+         "Incoming-Call-Request",                       /* 9 */
+         "Incoming-Call-Reply",                        /* 10 */
+         "Incoming-Call-Connected",                    /* 11 */
+         "Call-Clear-Request",                         /* 12 */
+         "Call-Disconnect-Notify",                     /* 13 */
+/*         (Error Reporting) */
+         "WAN-Error-Notify",                           /* 14 */
+/*         (PPP Session Control) */
+         "Set-Link-Info"                              /* 15 */
+};
+#define MAX_CTRLMSG_TYPE 15
+
+/*** report a sent packet ****************************************************/
+static void ctrlp_rep( void * buffer, int size, int isbuff)
+{
+    struct pptp_header *packet = buffer;
+    unsigned int type;
+    if(size < sizeof(struct pptp_header)) return;
+    type = ntoh16(packet->ctrl_type);
+    /* FIXME: do not report sending echo requests as long as they are
+     * sent in a signal handler. This may dead lock as the syslog call
+     * is not reentrant */
+    if( type ==  PPTP_ECHO_RQST ) return;
+    /* don't keep reporting sending of echo's */
+    if( (type == PPTP_ECHO_RQST || type == PPTP_ECHO_RPLY) && nlogecho <= 0 ) return;
+    log("%s control packet type is %d '%s'\n",isbuff ? "Buffered" : "Sent",
+            type, ctrl_msg_types[type <= MAX_CTRLMSG_TYPE ? type : 0]);
+
+}
+
+
+
+/* Open new pptp_connection.  Returns NULL on failure. */
+PPTP_CONN * pptp_conn_open(int inet_sock, int isclient, pptp_conn_cb callback)
+{
+    PPTP_CONN *conn;
+    /* Allocate structure */
+    if ((conn = malloc(sizeof(*conn))) == NULL) return NULL;
+    if ((conn->call = vector_create()) == NULL) { free(conn); return NULL; }
+    /* Initialize */
+    conn->inet_sock = inet_sock;
+    conn->conn_state = CONN_IDLE;
+    conn->ka_state  = KA_NONE;
+    conn->ka_id     = 1;
+    conn->call_serial_number = 0;
+    conn->callback  = callback;
+    /* Create I/O buffers */
+    conn->read_size = conn->write_size = 0;
+    conn->read_alloc = conn->write_alloc = INITIAL_BUFSIZE;
+    conn->read_buffer =
+        malloc(sizeof(*(conn->read_buffer)) * conn->read_alloc);
+    conn->write_buffer =
+        malloc(sizeof(*(conn->write_buffer)) * conn->write_alloc);
+    if (conn->read_buffer == NULL || conn->write_buffer == NULL) {
+        if (conn->read_buffer  != NULL) free(conn->read_buffer);
+        if (conn->write_buffer != NULL) free(conn->write_buffer);
+        vector_destroy(conn->call); free(conn); return NULL;
+    }
+    /* Make this socket non-blocking. */
+    fcntl(conn->inet_sock, F_SETFL, O_NONBLOCK);
+    /* Request connection from server, if this is a client */
+    if (isclient) {
+        struct pptp_start_ctrl_conn packet = {
+            PPTP_HEADER_CTRL(PPTP_START_CTRL_CONN_RQST),
+            hton16(PPTP_VERSION), 0, 0,
+            hton32(PPTP_FRAME_CAP), hton32(PPTP_BEARER_CAP),
+            hton16(PPTP_MAX_CHANNELS), hton16(PPTP_FIRMWARE_VERSION),
+            PPTP_HOSTNAME, PPTP_VENDOR
+        };
+        /* fix this packet, if necessary */
+        int idx, rc;
+        idx = get_quirk_index();
+        if (idx != -1 && pptp_fixups[idx].start_ctrl_conn) {
+            if ((rc = pptp_fixups[idx].start_ctrl_conn(&packet)))
+                warn("calling the start_ctrl_conn hook failed (%d)", rc);
+        }
+        if (pptp_send_ctrl_packet(conn, &packet, sizeof(packet)))
+            conn->conn_state = CONN_WAIT_CTL_REPLY;
+        else
+            return NULL; /* could not send initial start request. */
+    }
+    /* Set up interval/keep-alive timer */
+    /*   First, register handler for SIGALRM */
+    sigpipe_create();
+    sigpipe_assign(SIGALRM);
+    global.conn = conn;
+    /* Reset event timer */
+    pptp_reset_timer();
+    /* all done. */
+    return conn;
+}
+
+int pptp_conn_established(PPTP_CONN *conn) {
+  return (conn->conn_state == CONN_ESTABLISHED);
+}
+
+/* This currently *only* works for client call requests.
+ * We need to do something else to allocate calls for incoming requests.
+ */
+PPTP_CALL * pptp_call_open(PPTP_CONN * conn, int call_id,pptp_call_cb callback,
+        char *phonenr,int window)
+{
+    PPTP_CALL * call;
+    int idx, rc;
+    /* Send off the call request */
+    struct pptp_out_call_rqst packet = {
+        PPTP_HEADER_CTRL(PPTP_OUT_CALL_RQST),
+        0,0, /*call_id, sernum */
+        hton32(PPTP_BPS_MIN), hton32(PPTP_BPS_MAX),
+        hton32(PPTP_BEARER_CAP), hton32(PPTP_FRAME_CAP),
+        hton16(window), 0, 0, 0, {0}, {0}
+    };
+    assert(conn && conn->call);
+    assert(conn->conn_state == CONN_ESTABLISHED);
+    /* Assign call id */
+    if (!call_id && !vector_scan(conn->call, 0, PPTP_MAX_CHANNELS - 1, &call_id))
+        /* no more calls available! */
+        return NULL;
+    /* allocate structure. */
+    if ((call = malloc(sizeof(*call))) == NULL) return NULL;
+    /* Initialize call structure */
+    call->call_type = PPTP_CALL_PNS;
+    call->state.pns = PNS_IDLE;
+    call->call_id   = (u_int16_t) call_id;
+    call->sernum    = conn->call_serial_number++;
+    call->callback  = callback;
+    call->closure   = NULL;
+    packet.call_id = htons(call->call_id);
+    packet.call_sernum = htons(call->sernum);
+    /* if we have a quirk, build a new packet to fit it */
+    idx = get_quirk_index();
+    if (idx != -1 && pptp_fixups[idx].out_call_rqst_hook) {
+        if ((rc = pptp_fixups[idx].out_call_rqst_hook(&packet)))
+            warn("calling the out_call_rqst hook failed (%d)", rc);
+    }
+    /* fill in the phone number if it was specified */
+    if (phonenr) {
+        strncpy(packet.phone_num, phonenr, sizeof(packet.phone_num));
+        packet.phone_len = strlen(phonenr);
+        if( packet.phone_len > sizeof(packet.phone_num))
+            packet.phone_len = sizeof(packet.phone_num);
+        packet.phone_len = hton16 (packet.phone_len);
+    }
+    if (pptp_send_ctrl_packet(conn, &packet, sizeof(packet))) {
+        pptp_reset_timer();
+        call->state.pns = PNS_WAIT_REPLY;
+        /* and add it to the call vector */
+        vector_insert(conn->call, call_id, call);
+        return call;
+    } else { /* oops, unsuccessful. Deallocate. */
+        free(call);
+        return NULL;
+    }
+}
+
+/*** pptp_call_close **********************************************************/
+void pptp_call_close(PPTP_CONN * conn, PPTP_CALL * call)
+{
+    struct pptp_call_clear_rqst rqst = {
+        PPTP_HEADER_CTRL(PPTP_CALL_CLEAR_RQST), 0, 0
+    };
+    assert(conn && conn->call); assert(call);
+    assert(vector_contains(conn->call, call->call_id));
+    /* haven't thought about PAC yet */
+    assert(call->call_type == PPTP_CALL_PNS);
+    assert(call->state.pns != PNS_IDLE);
+    rqst.call_id = hton16(call->call_id);
+    /* don't check state against WAIT_DISCONNECT... allow multiple disconnect
+     * requests to be made.
+     */
+    pptp_send_ctrl_packet(conn, &rqst, sizeof(rqst));
+    pptp_reset_timer();
+    call->state.pns = PNS_WAIT_DISCONNECT;
+    /* call structure will be freed when we have confirmation of disconnect. */
+}
+
+/*** hard close ***************************************************************/
+void pptp_call_destroy(PPTP_CONN *conn, PPTP_CALL *call)
+{
+    assert(conn && conn->call); assert(call);
+    assert(vector_contains(conn->call, call->call_id));
+    /* notify */
+    if (call->callback != NULL) call->callback(conn, call, CALL_CLOSE_DONE);
+    /* deallocate */
+    vector_remove(conn->call, call->call_id);
+    free(call);
+}
+
+/*** this is a soft close *****************************************************/
+void pptp_conn_close(PPTP_CONN * conn, u_int8_t close_reason)
+{
+    struct pptp_stop_ctrl_conn rqst = {
+        PPTP_HEADER_CTRL(PPTP_STOP_CTRL_CONN_RQST),
+        hton8(close_reason), 0, 0
+    };
+    int i;
+    assert(conn && conn->call);
+    /* avoid repeated close attempts */
+    if (conn->conn_state == CONN_IDLE || conn->conn_state == CONN_WAIT_STOP_REPLY)
+        return;
+    /* close open calls, if any */
+    for (i = 0; i < vector_size(conn->call); i++)
+        pptp_call_close(conn, vector_get_Nth(conn->call, i));
+    /* now close connection */
+    log("Closing PPTP connection");
+    pptp_send_ctrl_packet(conn, &rqst, sizeof(rqst));
+    pptp_reset_timer(); /* wait 60 seconds for reply */
+    conn->conn_state = CONN_WAIT_STOP_REPLY;
+    return;
+}
+
+/*** this is a hard close *****************************************************/
+void pptp_conn_destroy(PPTP_CONN * conn)
+{
+    int i;
+    assert(conn != NULL); assert(conn->call != NULL);
+    /* destroy all open calls */
+    for (i = 0; i < vector_size(conn->call); i++)
+        pptp_call_destroy(conn, vector_get_Nth(conn->call, i));
+    /* notify */
+    if (conn->callback != NULL) conn->callback(conn, CONN_CLOSE_DONE);
+    sigpipe_close();
+    close(conn->inet_sock);
+    /* deallocate */
+    vector_destroy(conn->call);
+    free(conn);
+}
+
+/*** Deal with messages, in a non-blocking manner
+ * Add file descriptors used by pptp to fd_set.
+ */
+void pptp_fd_set(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set,
+                 int * max_fd)
+{
+    assert(conn && conn->call);
+    /* Add fd to write_set if there are outstanding writes. */
+    if (conn->write_size > 0)
+        FD_SET(conn->inet_sock, write_set);
+    /* Always add fd to read_set. (always want something to read) */
+    FD_SET(conn->inet_sock, read_set);
+    if (*max_fd < conn->inet_sock) *max_fd = conn->inet_sock;
+    /* Add signal pipe file descriptor to set */
+    int sig_fd = sigpipe_fd();
+    FD_SET(sig_fd, read_set);
+    if (*max_fd < sig_fd) *max_fd = sig_fd;
+}
+
+/*** handle any pptp file descriptors set in fd_set, and clear them ***********/
+int pptp_dispatch(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set)
+{
+    int r = 0;
+    assert(conn && conn->call);
+    /* Check for signals */
+    if (FD_ISSET(sigpipe_fd(), read_set)) {
+        if (sigpipe_read() == SIGALRM) pptp_handle_timer();
+	FD_CLR(sigpipe_fd(), read_set);
+    }
+    /* Check write_set could be set. */
+    if (FD_ISSET(conn->inet_sock, write_set)) {
+        FD_CLR(conn->inet_sock, write_set);
+        if (conn->write_size > 0)
+            r = pptp_write_some(conn);/* write as much as we can without blocking */
+    }
+    /* Check read_set */
+    if (r >= 0 && FD_ISSET(conn->inet_sock, read_set)) {
+        void *buffer; size_t size;
+        FD_CLR(conn->inet_sock, read_set);
+        r = pptp_read_some(conn); /* read as much as we can without blocking */
+	if (r < 0)
+	    return r;
+        /* make packets of the buffer, while we can. */
+        while (r >= 0 && pptp_make_packet(conn, &buffer, &size)) {
+            r = pptp_dispatch_packet(conn, buffer, size);
+            free(buffer);
+        }
+    }
+    /* That's all, folks.  Simple, eh? */
+    return r;
+}
+
+/*** Non-blocking write *******************************************************/
+int pptp_write_some(PPTP_CONN * conn) {
+    ssize_t retval;
+    assert(conn && conn->call);
+    retval = write(conn->inet_sock, conn->write_buffer, conn->write_size);
+    if (retval < 0) { /* error. */
+        if (errno == EAGAIN || errno == EINTR) {
+            return 0;
+        } else { /* a real error */
+            log("write error: %s", strerror(errno));
+	    return -1;
+        }
+    }
+    assert(retval <= conn->write_size);
+    conn->write_size -= retval;
+    memmove(conn->write_buffer, conn->write_buffer + retval, conn->write_size);
+    ctrlp_rep(conn->write_buffer, retval, 0);
+    return 0;
+}
+
+/*** Non-blocking read ********************************************************/
+int pptp_read_some(PPTP_CONN * conn)
+{
+    ssize_t retval;
+    assert(conn && conn->call);
+    if (conn->read_size == conn->read_alloc) { /* need to alloc more memory */
+        char *new_buffer = realloc(conn->read_buffer,
+                sizeof(*(conn->read_buffer)) * conn->read_alloc * 2);
+        if (new_buffer == NULL) {
+            log("Out of memory"); return -1;
+        }
+        conn->read_alloc *= 2;
+        conn->read_buffer = new_buffer;
+    }
+    retval = read(conn->inet_sock, conn->read_buffer + conn->read_size,
+            conn->read_alloc  - conn->read_size);
+    if (retval == 0) {
+        log("read returned zero, peer has closed");
+        return -1;
+    }
+    if (retval < 0) {
+        if (errno == EINTR || errno == EAGAIN)
+	    return 0;
+        else { /* a real error */
+            log("read error: %s", strerror(errno));
+            return -1;
+        }
+    }
+    conn->read_size += retval;
+    assert(conn->read_size <= conn->read_alloc);
+    return 0;
+}
+
+/*** Packet formation *********************************************************/
+int pptp_make_packet(PPTP_CONN * conn, void **buf, size_t *size)
+{
+    struct pptp_header *header;
+    size_t bad_bytes = 0;
+    assert(conn && conn->call); assert(buf != NULL); assert(size != NULL);
+    /* Give up unless there are at least sizeof(pptp_header) bytes */
+    while ((conn->read_size-bad_bytes) >= sizeof(struct pptp_header)) {
+        /* Throw out bytes until we have a valid header. */
+        header = (struct pptp_header *) (conn->read_buffer + bad_bytes);
+        if (ntoh32(header->magic) != PPTP_MAGIC) goto throwitout;
+        if (ntoh16(header->reserved0) != 0)
+            log("reserved0 field is not zero! (0x%x) Cisco feature? \n",
+                    ntoh16(header->reserved0));
+        if (ntoh16(header->length) < sizeof(struct pptp_header)) goto throwitout;
+        if (ntoh16(header->length) > PPTP_CTRL_SIZE_MAX) goto throwitout;
+        /* well.  I guess it's good. Let's see if we've got it all. */
+        if (ntoh16(header->length) > (conn->read_size-bad_bytes))
+            /* nope.  Let's wait until we've got it, then. */
+            goto flushbadbytes;
+        /* One last check: */
+        if ((ntoh16(header->pptp_type) == PPTP_MESSAGE_CONTROL) &&
+                (ntoh16(header->length) !=
+                         PPTP_CTRL_SIZE(ntoh16(header->ctrl_type))))
+            goto throwitout;
+        /* well, I guess we've got it. */
+        *size = ntoh16(header->length);
+        *buf = malloc(*size);
+        if (*buf == NULL) { log("Out of memory."); return 0; /* ack! */ }
+        memcpy(*buf, conn->read_buffer + bad_bytes, *size);
+        /* Delete this packet from the read_buffer. */
+        conn->read_size -= (bad_bytes + *size);
+        memmove(conn->read_buffer, conn->read_buffer + bad_bytes + *size,
+                conn->read_size);
+        if (bad_bytes > 0)
+            log("%lu bad bytes thrown away.", (unsigned long) bad_bytes);
+        return 1;
+throwitout:
+        bad_bytes++;
+    }
+flushbadbytes:
+    /* no more packets.  Let's get rid of those bad bytes */
+    conn->read_size -= bad_bytes;
+    memmove(conn->read_buffer, conn->read_buffer + bad_bytes, conn->read_size);
+    if (bad_bytes > 0)
+        log("%lu bad bytes thrown away.", (unsigned long) bad_bytes);
+    return 0;
+}
+
+/*** pptp_send_ctrl_packet ****************************************************/
+int pptp_send_ctrl_packet(PPTP_CONN * conn, void * buffer, size_t size)
+{
+    assert(conn && conn->call); assert(buffer);
+    if( conn->write_size > 0) pptp_write_some( conn);
+    if( conn->write_size == 0) {
+        ssize_t retval;
+        retval = write(conn->inet_sock, buffer, size);
+        if (retval < 0) { /* error. */
+            if (errno == EAGAIN || errno == EINTR) {
+                /* ignore */;
+                retval = 0;
+            } else { /* a real error */
+                log("write error: %s", strerror(errno));
+                pptp_conn_destroy(conn); /* shut down fast. */
+                return 0;
+            }
+        }
+        ctrlp_rep( buffer, retval, 0);
+        size -= retval;
+        if( size <= 0) return 1;
+    }
+    /* Shove anything not written into the write buffer */
+    if (conn->write_size + size > conn->write_alloc) { /* need more memory */
+        char *new_buffer = realloc(conn->write_buffer,
+                sizeof(*(conn->write_buffer)) * conn->write_alloc * 2);
+        if (new_buffer == NULL) {
+            log("Out of memory"); return 0;
+        }
+        conn->write_alloc *= 2;
+        conn->write_buffer = new_buffer;
+    }
+    memcpy(conn->write_buffer + conn->write_size, buffer, size);
+    conn->write_size += size;
+    ctrlp_rep( buffer,size,1);
+    return 1;
+}
+
+/*** Packet Dispatch **********************************************************/
+int pptp_dispatch_packet(PPTP_CONN * conn, void * buffer, size_t size)
+{
+    int r = 0;
+    struct pptp_header *header = (struct pptp_header *)buffer;
+    assert(conn && conn->call); assert(buffer);
+    assert(ntoh32(header->magic) == PPTP_MAGIC);
+    assert(ntoh16(header->length) == size);
+    switch (ntoh16(header->pptp_type)) {
+        case PPTP_MESSAGE_CONTROL:
+            r = ctrlp_disp(conn, buffer, size);
+            break;
+        case PPTP_MESSAGE_MANAGE:
+            /* MANAGEMENT messages aren't even part of the spec right now. */
+            log("PPTP management message received, but not understood.");
+            break;
+        default:
+            log("Unknown PPTP control message type received: %u",
+                    (unsigned int) ntoh16(header->pptp_type));
+            break;
+    }
+    return r;
+}
+
+/*** log echo request/replies *************************************************/
+static void logecho( int type)
+{
+    /* hack to stop flooding the log files (the most interesting part is right
+     * after the connection built-up) */
+    if( nlogecho > 0) {
+        log( "Echo Re%s received.", type == PPTP_ECHO_RQST ? "quest" :"ply");
+        if( --nlogecho == 0)
+            log("no more Echo Reply/Request packets will be reported.");
+    }
+}
+
+/*** pptp_dispatch_ctrl_packet ************************************************/
+int ctrlp_disp(PPTP_CONN * conn, void * buffer, size_t size)
+{
+    struct pptp_header *header = (struct pptp_header *)buffer;
+    u_int8_t close_reason = PPTP_STOP_NONE;
+    assert(conn && conn->call); assert(buffer);
+    assert(ntoh32(header->magic) == PPTP_MAGIC);
+    assert(ntoh16(header->length) == size);
+    assert(ntoh16(header->pptp_type) == PPTP_MESSAGE_CONTROL);
+    if (size < PPTP_CTRL_SIZE(ntoh16(header->ctrl_type))) {
+        log("Invalid packet received [type: %d; length: %d].",
+                (int) ntoh16(header->ctrl_type), (int) size);
+        return 0;
+    }
+    switch (ntoh16(header->ctrl_type)) {
+        /* ----------- STANDARD Start-Session MESSAGES ------------ */
+        case PPTP_START_CTRL_CONN_RQST:
+        {
+            struct pptp_start_ctrl_conn *packet =
+                (struct pptp_start_ctrl_conn *) buffer;
+            struct pptp_start_ctrl_conn reply = {
+                PPTP_HEADER_CTRL(PPTP_START_CTRL_CONN_RPLY),
+                hton16(PPTP_VERSION), 0, 0,
+                hton32(PPTP_FRAME_CAP), hton32(PPTP_BEARER_CAP),
+                hton16(PPTP_MAX_CHANNELS), hton16(PPTP_FIRMWARE_VERSION),
+                PPTP_HOSTNAME, PPTP_VENDOR };
+            int idx, rc;
+            log("Received Start Control Connection Request");
+            /* fix this packet, if necessary */
+            idx = get_quirk_index();
+            if (idx != -1 && pptp_fixups[idx].start_ctrl_conn) {
+                if ((rc = pptp_fixups[idx].start_ctrl_conn(&reply)))
+                    warn("calling the start_ctrl_conn hook failed (%d)", rc);
+            }
+            if (conn->conn_state == CONN_IDLE) {
+                if (ntoh16(packet->version) < PPTP_VERSION) {
+                    /* Can't support this (earlier) PPTP_VERSION */
+                    reply.version = packet->version;
+                    /* protocol version not supported */
+                    reply.result_code = hton8(5);
+                    pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+                    pptp_reset_timer(); /* give sender a chance for a retry */
+                } else { /* same or greater version */
+                    if (pptp_send_ctrl_packet(conn, &reply, sizeof(reply))) {
+                        conn->conn_state = CONN_ESTABLISHED;
+                        log("server connection ESTABLISHED.");
+                        pptp_reset_timer();
+                    }
+                }
+            }
+            break;
+        }
+        case PPTP_START_CTRL_CONN_RPLY:
+        {
+            struct pptp_start_ctrl_conn *packet =
+                (struct pptp_start_ctrl_conn *) buffer;
+            log("Received Start Control Connection Reply");
+            if (conn->conn_state == CONN_WAIT_CTL_REPLY) {
+                /* XXX handle collision XXX [see rfc] */
+                if (ntoh16(packet->version) != PPTP_VERSION) {
+                    if (conn->callback != NULL)
+                        conn->callback(conn, CONN_OPEN_FAIL);
+                    close_reason = PPTP_STOP_PROTOCOL;
+                    goto pptp_conn_close;
+                }
+                if (ntoh8(packet->result_code) != 1 &&
+                    /* J'ai change le if () afin que la connection ne se ferme
+                     * pas pour un "rien" :p adel@cybercable.fr -
+                     *
+                     * Don't close the connection if the result code is zero
+                     * (feature found in certain ADSL modems)
+                     */
+                        ntoh8(packet->result_code) != 0) {
+                    log("Negative reply received to our Start Control "
+                            "Connection Request");
+                    ctrlp_error(packet->result_code, packet->error_code,
+                            -1, pptp_start_ctrl_conn_rply,
+                            MAX_START_CTRL_CONN_REPLY);
+                    if (conn->callback != NULL)
+                        conn->callback(conn, CONN_OPEN_FAIL);
+                    close_reason = PPTP_STOP_PROTOCOL;
+                    goto pptp_conn_close;
+                }
+                conn->conn_state = CONN_ESTABLISHED;
+                /* log session properties */
+                conn->version      = ntoh16(packet->version);
+                conn->firmware_rev = ntoh16(packet->firmware_rev);
+                memcpy(conn->hostname, packet->hostname, sizeof(conn->hostname));
+                memcpy(conn->vendor, packet->vendor, sizeof(conn->vendor));
+                pptp_reset_timer(); /* 60 seconds until keep-alive */
+                log("Client connection established.");
+                if (conn->callback != NULL)
+                    conn->callback(conn, CONN_OPEN_DONE);
+            } /* else goto pptp_conn_close; */
+            break;
+        }
+            /* ----------- STANDARD Stop-Session MESSAGES ------------ */
+        case PPTP_STOP_CTRL_CONN_RQST:
+        {
+            /* conn_state should be CONN_ESTABLISHED, but it could be
+             * something else */
+            struct pptp_stop_ctrl_conn reply = {
+                PPTP_HEADER_CTRL(PPTP_STOP_CTRL_CONN_RPLY),
+                hton8(1), hton8(PPTP_GENERAL_ERROR_NONE), 0
+            };
+            log("Received Stop Control Connection Request.");
+            if (conn->conn_state == CONN_IDLE) break;
+            if (pptp_send_ctrl_packet(conn, &reply, sizeof(reply))) {
+                if (conn->callback != NULL)
+                    conn->callback(conn, CONN_CLOSE_RQST);
+                conn->conn_state = CONN_IDLE;
+		return -1;
+            }
+            break;
+        }
+        case PPTP_STOP_CTRL_CONN_RPLY:
+        {
+            log("Received Stop Control Connection Reply.");
+            /* conn_state should be CONN_WAIT_STOP_REPLY, but it
+             * could be something else */
+            if (conn->conn_state == CONN_IDLE) break;
+            conn->conn_state = CONN_IDLE;
+	    return -1;
+        }
+            /* ----------- STANDARD Echo/Keepalive MESSAGES ------------ */
+        case PPTP_ECHO_RPLY:
+        {
+            struct pptp_echo_rply *packet =
+                (struct pptp_echo_rply *) buffer;
+            logecho( PPTP_ECHO_RPLY);
+            if ((conn->ka_state == KA_OUTSTANDING) &&
+                    (ntoh32(packet->identifier) == conn->ka_id)) {
+                conn->ka_id++;
+                conn->ka_state = KA_NONE;
+                pptp_reset_timer();
+            }
+            break;
+        }
+        case PPTP_ECHO_RQST:
+        {
+            struct pptp_echo_rqst *packet =
+                (struct pptp_echo_rqst *) buffer;
+            struct pptp_echo_rply reply = {
+                PPTP_HEADER_CTRL(PPTP_ECHO_RPLY),
+                packet->identifier, /* skip hton32(ntoh32(id)) */
+                hton8(1), hton8(PPTP_GENERAL_ERROR_NONE), 0
+            };
+            logecho( PPTP_ECHO_RQST);
+            pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+            pptp_reset_timer();
+            break;
+        }
+            /* ----------- OUTGOING CALL MESSAGES ------------ */
+        case PPTP_OUT_CALL_RQST:
+        {
+            struct pptp_out_call_rqst *packet =
+                (struct pptp_out_call_rqst *)buffer;
+            struct pptp_out_call_rply reply = {
+                PPTP_HEADER_CTRL(PPTP_OUT_CALL_RPLY),
+                0 /* callid */, packet->call_id, 1, PPTP_GENERAL_ERROR_NONE, 0,
+                hton32(PPTP_CONNECT_SPEED),
+                hton16(PPTP_WINDOW), hton16(PPTP_DELAY), 0
+            };
+            log("Received Outgoing Call Request.");
+            /* XXX PAC: eventually this should make an outgoing call. XXX */
+            reply.result_code = hton8(7); /* outgoing calls verboten */
+            pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+            break;
+        }
+        case PPTP_OUT_CALL_RPLY:
+        {
+            struct pptp_out_call_rply *packet =
+                (struct pptp_out_call_rply *)buffer;
+            PPTP_CALL * call;
+            u_int16_t callid = ntoh16(packet->call_id_peer);
+            log("Received Outgoing Call Reply.");
+            if (!vector_search(conn->call, (int) callid, &call)) {
+                log("PPTP_OUT_CALL_RPLY received for non-existant call: "
+                        "peer call ID (us)  %d call ID (them) %d.",
+                        callid, ntoh16(packet->call_id));
+                break;
+            }
+            if (call->call_type != PPTP_CALL_PNS) {
+                log("Ack!  How did this call_type get here?"); /* XXX? */
+                break;
+            }
+            if (call->state.pns != PNS_WAIT_REPLY) {
+                warn("Unexpected(?) Outgoing Call Reply will be ignored.");
+                break;
+            }
+            /* check for errors */
+            if (packet->result_code != 1) {
+                /* An error.  Log it verbosely. */
+                log("Our outgoing call request [callid %d] has not been "
+                        "accepted.", (int) callid);
+                ctrlp_error(packet->result_code, packet->error_code,
+                        packet->cause_code, pptp_out_call_reply_result,
+                        MAX_OUT_CALL_REPLY_RESULT);
+                call->state.pns = PNS_IDLE;
+                if (call->callback != NULL)
+                    call->callback(conn, call, CALL_OPEN_FAIL);
+                pptp_call_destroy(conn, call);
+            } else {
+                /* connection established */
+                call->state.pns = PNS_ESTABLISHED;
+                call->peer_call_id = ntoh16(packet->call_id);
+                call->speed        = ntoh32(packet->speed);
+                pptp_reset_timer();
+                /* call pptp_set_link. unless the user specified a quirk
+                   and this quirk has a set_link hook, this is a noop */
+                pptp_set_link(conn, call->peer_call_id);
+                if (call->callback != NULL)
+                    call->callback(conn, call, CALL_OPEN_DONE);
+                log("Outgoing call established (call ID %u, peer's "
+                        "call ID %u).\n", call->call_id, call->peer_call_id);
+            }
+            break;
+        }
+            /* ----------- INCOMING CALL MESSAGES ------------ */
+            /* XXX write me XXX */
+            /* ----------- CALL CONTROL MESSAGES ------------ */
+        case PPTP_CALL_CLEAR_RQST:
+        {
+            struct pptp_call_clear_rqst *packet =
+                (struct pptp_call_clear_rqst *)buffer;
+            struct pptp_call_clear_ntfy reply = {
+                PPTP_HEADER_CTRL(PPTP_CALL_CLEAR_NTFY), packet->call_id,
+                1, PPTP_GENERAL_ERROR_NONE, 0, 0, {0}
+            };
+            log("Received Call Clear Request.");
+            if (vector_contains(conn->call, ntoh16(packet->call_id))) {
+                PPTP_CALL * call;
+                vector_search(conn->call, ntoh16(packet->call_id), &call);
+                if (call->callback != NULL)
+                    call->callback(conn, call, CALL_CLOSE_RQST);
+                pptp_send_ctrl_packet(conn, &reply, sizeof(reply));
+                pptp_call_destroy(conn, call);
+                log("Call closed (RQST) (call id %d)", (int) call->call_id);
+            }
+            break;
+        }
+        case PPTP_CALL_CLEAR_NTFY:
+        {
+            struct pptp_call_clear_ntfy *packet =
+                (struct pptp_call_clear_ntfy *)buffer;
+            log("Call disconnect notification received (call id %d)",
+                    ntoh16(packet->call_id));
+            if (vector_contains(conn->call, ntoh16(packet->call_id))) {
+                PPTP_CALL * call;
+                ctrlp_error(packet->result_code, packet->error_code,
+                        packet->cause_code, pptp_call_disc_ntfy,
+                        MAX_CALL_DISC_NTFY);
+                vector_search(conn->call, ntoh16(packet->call_id), &call);
+                pptp_call_destroy(conn, call);
+            }
+            /* XXX we could log call stats here XXX */
+            /* XXX not all servers send this XXX */
+            break;
+        }
+        case PPTP_SET_LINK_INFO:
+        {
+            /* I HAVE NO CLUE WHAT TO DO IF send_accm IS NOT 0! */
+            /* this is really dealt with in the HDLC deencapsulation, anyway. */
+            struct pptp_set_link_info *packet =
+                (struct pptp_set_link_info *)buffer;
+            /* log it. */
+            log("PPTP_SET_LINK_INFO received from peer_callid %u",
+                    (unsigned int) ntoh16(packet->call_id_peer));
+            log("  send_accm is %08lX, recv_accm is %08lX",
+                    (unsigned long) ntoh32(packet->send_accm),
+                    (unsigned long) ntoh32(packet->recv_accm));
+            if (!(ntoh32(packet->send_accm) == 0 &&
+                    ntoh32(packet->recv_accm) == 0))
+                warn("Non-zero Async Control Character Maps are not supported!");
+            break;
+        }
+        default:
+            log("Unrecognized Packet %d received.",
+                    (int) ntoh16(((struct pptp_header *)buffer)->ctrl_type));
+            /* goto pptp_conn_close; */
+            break;
+    }
+    return 0;
+pptp_conn_close:
+    warn("pptp_conn_close(%d)", (int) close_reason);
+    pptp_conn_close(conn, close_reason);
+    return 0;
+}
+
+/*** pptp_set_link **************************************************************/
+void pptp_set_link(PPTP_CONN* conn, int peer_call_id)
+{
+    int idx, rc;
+    /* if we need to send a set_link packet because of buggy
+       hardware or pptp server, do it now */
+    if ((idx = get_quirk_index()) != -1 && pptp_fixups[idx].set_link_hook) {
+        struct pptp_set_link_info packet;
+        if ((rc = pptp_fixups[idx].set_link_hook(&packet, peer_call_id)))
+            warn("calling the set_link hook failed (%d)", rc);
+        if (pptp_send_ctrl_packet(conn, &packet, sizeof(packet))) {
+            pptp_reset_timer();
+        }
+    }
+}
+
+/*** Get info from call structure *********************************************/
+/* NOTE: The peer_call_id is undefined until we get a server response. */
+void pptp_call_get_ids(PPTP_CONN * conn, PPTP_CALL * call,
+		       u_int16_t * call_id, u_int16_t * peer_call_id)
+{
+    assert(conn != NULL); assert(call != NULL);
+    *call_id = call->call_id;
+    *peer_call_id = call->peer_call_id;
+}
+
+/*** pptp_call_closure_put ****************************************************/
+void   pptp_call_closure_put(PPTP_CONN * conn, PPTP_CALL * call, void *cl)
+{
+    assert(conn != NULL); assert(call != NULL);
+    call->closure = cl;
+}
+
+/*** pptp_call_closure_get ****************************************************/
+void * pptp_call_closure_get(PPTP_CONN * conn, PPTP_CALL * call)
+{
+    assert(conn != NULL); assert(call != NULL);
+    return call->closure;
+}
+
+/*** pptp_conn_closure_put ****************************************************/
+void   pptp_conn_closure_put(PPTP_CONN * conn, void *cl)
+{
+    assert(conn != NULL);
+    conn->closure = cl;
+}
+
+/*** pptp_conn_closure_get ****************************************************/
+void * pptp_conn_closure_get(PPTP_CONN * conn)
+{
+    assert(conn != NULL);
+    return conn->closure;
+}
+
+/*** Reset keep-alive timer ***************************************************/
+static void pptp_reset_timer(void)
+{
+    const struct itimerval tv = { {  0, 0 },   /* stop on time-out */
+        { idle_wait, 0 } };
+    if (idle_wait) setitimer(ITIMER_REAL, &tv, NULL);
+}
+
+
+/*** Handle keep-alive timer **************************************************/
+static void pptp_handle_timer()
+{
+    int i;
+    /* "Keep Alives and Timers, 1": check connection state */
+    if (global.conn->conn_state != CONN_ESTABLISHED) {
+        if (global.conn->conn_state == CONN_WAIT_STOP_REPLY)
+            /* hard close. */
+            pptp_conn_destroy(global.conn);
+        else /* soft close */
+            pptp_conn_close(global.conn, PPTP_STOP_NONE);
+    }
+    /* "Keep Alives and Timers, 2": check echo status */
+    if (global.conn->ka_state == KA_OUTSTANDING) {
+        /* no response to keep-alive */
+        log ("closing control connection due to missing echo reply");
+	pptp_conn_close(global.conn, PPTP_STOP_NONE);
+    } else { /* ka_state == NONE */ /* send keep-alive */
+        struct pptp_echo_rqst rqst = {
+            PPTP_HEADER_CTRL(PPTP_ECHO_RQST), hton32(global.conn->ka_id) };
+        pptp_send_ctrl_packet(global.conn, &rqst, sizeof(rqst));
+        global.conn->ka_state = KA_OUTSTANDING;
+    }
+    /* check incoming/outgoing call states for !IDLE && !ESTABLISHED */
+    for (i = 0; i < vector_size(global.conn->call); i++) {
+        PPTP_CALL * call = vector_get_Nth(global.conn->call, i);
+        if (call->call_type == PPTP_CALL_PNS) {
+            if (call->state.pns == PNS_WAIT_REPLY) {
+                /* send close request */
+                pptp_call_close(global.conn, call);
+                assert(call->state.pns == PNS_WAIT_DISCONNECT);
+            } else if (call->state.pns == PNS_WAIT_DISCONNECT) {
+                /* hard-close the call */
+                pptp_call_destroy(global.conn, call);
+            }
+        } else if (call->call_type == PPTP_CALL_PAC) {
+            if (call->state.pac == PAC_WAIT_REPLY) {
+                /* XXX FIXME -- drop the PAC connection XXX */
+            } else if (call->state.pac == PAC_WAIT_CS_ANS) {
+                /* XXX FIXME -- drop the PAC connection XXX */
+            }
+        }
+    }
+    pptp_reset_timer();
+}
diff --git a/pppd_plugin/src/pptp_ctrl.h b/pppd_plugin/src/pptp_ctrl.h
new file mode 100644
index 0000000..a7bb506
--- /dev/null
+++ b/pppd_plugin/src/pptp_ctrl.h
@@ -0,0 +1,57 @@
+/* pptp_ctrl.h ... handle PPTP control connection.
+ *                 C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_ctrl.h,v 1.5 2004/11/09 01:42:32 quozl Exp $
+ */
+
+#ifndef INC_PPTP_CTRL_H
+#define INC_PPTP_CTRL_H
+#include <sys/types.h>
+
+typedef struct PPTP_CONN PPTP_CONN;
+typedef struct PPTP_CALL PPTP_CALL;
+
+enum call_state { CALL_OPEN_RQST,  CALL_OPEN_DONE, CALL_OPEN_FAIL,
+		  CALL_CLOSE_RQST, CALL_CLOSE_DONE };
+enum conn_state { CONN_OPEN_RQST,  CONN_OPEN_DONE, CONN_OPEN_FAIL,
+		  CONN_CLOSE_RQST, CONN_CLOSE_DONE };
+
+typedef void (*pptp_call_cb)(PPTP_CONN*, PPTP_CALL*, enum call_state);
+typedef void (*pptp_conn_cb)(PPTP_CONN*, enum conn_state);
+
+/* if 'isclient' is true, then will send 'conn open' packet to other host.
+ * not necessary if this is being opened by a server process after
+ * receiving a conn_open packet from client.
+ */
+PPTP_CONN * pptp_conn_open(int inet_sock, int isclient,
+			   pptp_conn_cb callback);
+PPTP_CALL * pptp_call_open(PPTP_CONN * conn, int call_id,
+			   pptp_call_cb callback, char *phonenr,int window);
+int pptp_conn_established(PPTP_CONN * conn);
+/* soft close.  Will callback on completion. */
+void pptp_call_close(PPTP_CONN * conn, PPTP_CALL * call);
+/* hard close. */
+void pptp_call_destroy(PPTP_CONN *conn, PPTP_CALL *call);
+/* soft close.  Will callback on completion. */
+void pptp_conn_close(PPTP_CONN * conn, u_int8_t close_reason);
+/* hard close */
+void pptp_conn_destroy(PPTP_CONN * conn);
+
+/* Add file descriptors used by pptp to fd_set. */
+void pptp_fd_set(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set, int *max_fd);
+/* handle any pptp file descriptors set in fd_set, and clear them */
+int pptp_dispatch(PPTP_CONN * conn, fd_set * read_set, fd_set * write_set);
+
+/* Get info about connection, call */
+void pptp_call_get_ids(PPTP_CONN * conn, PPTP_CALL * call,
+		       u_int16_t * call_id, u_int16_t * peer_call_id);
+/* Arbitrary user data about this call/connection.
+ * It is the caller's responsibility to free this data before calling
+ * pptp_call|conn_close()
+ */
+void * pptp_conn_closure_get(PPTP_CONN * conn);
+void   pptp_conn_closure_put(PPTP_CONN * conn, void *cl);
+void * pptp_call_closure_get(PPTP_CONN * conn, PPTP_CALL * call);
+void   pptp_call_closure_put(PPTP_CONN * conn, PPTP_CALL * call, void *cl);
+
+#endif /* INC_PPTP_CTRL_H */
diff --git a/pppd_plugin/src/pptp_msg.h b/pppd_plugin/src/pptp_msg.h
new file mode 100644
index 0000000..e50ce0c
--- /dev/null
+++ b/pppd_plugin/src/pptp_msg.h
@@ -0,0 +1,303 @@
+/*  pptp.h:  packet structures and magic constants for the PPTP protocol 
+ *           C. Scott Ananian <cananian@alumni.princeton.edu>            
+ *
+ * $Id: pptp_msg.h,v 1.3 2003/02/15 10:37:21 quozl Exp $
+ */
+
+#ifndef INC_PPTP_H
+#define INC_PPTP_H
+
+/* Grab definitions of int16, int32, etc. */
+#include <sys/types.h>
+/* define "portable" htons, etc. */
+#define hton8(x)  (x)
+#define ntoh8(x)  (x)
+#define hton16(x) htons(x)
+#define ntoh16(x) ntohs(x)
+#define hton32(x) htonl(x)
+#define ntoh32(x) ntohl(x)
+
+/* PPTP magic numbers: ----------------------------------------- */
+
+#define PPTP_MAGIC 0x1A2B3C4D /* Magic cookie for PPTP datagrams */
+#define PPTP_PORT  1723       /* PPTP TCP port number            */
+#define PPTP_PROTO 47         /* PPTP IP protocol number         */
+
+/* Control Connection Message Types: --------------------------- */
+
+#define PPTP_MESSAGE_CONTROL		1
+#define PPTP_MESSAGE_MANAGE		2
+
+/* Control Message Types: -------------------------------------- */
+
+/* (Control Connection Management) */
+#define PPTP_START_CTRL_CONN_RQST	1
+#define PPTP_START_CTRL_CONN_RPLY	2
+#define PPTP_STOP_CTRL_CONN_RQST	3
+#define PPTP_STOP_CTRL_CONN_RPLY	4
+#define PPTP_ECHO_RQST			5
+#define PPTP_ECHO_RPLY			6
+
+/* (Call Management) */
+#define PPTP_OUT_CALL_RQST		7
+#define PPTP_OUT_CALL_RPLY		8
+#define PPTP_IN_CALL_RQST		9
+#define PPTP_IN_CALL_RPLY		10
+#define PPTP_IN_CALL_CONNECT		11
+#define PPTP_CALL_CLEAR_RQST		12
+#define PPTP_CALL_CLEAR_NTFY		13
+
+/* (Error Reporting) */
+#define PPTP_WAN_ERR_NTFY		14
+
+/* (PPP Session Control) */
+#define PPTP_SET_LINK_INFO		15
+
+/* PPTP version information: --------------------------------------*/
+#define PPTP_VERSION_STRING	"1.00"
+#define PPTP_VERSION		0x100
+#define PPTP_FIRMWARE_STRING	"0.01"
+#define PPTP_FIRMWARE_VERSION	0x001
+
+/* PPTP capabilities: ---------------------------------------------*/
+
+/* (Framing capabilities for msg sender) */
+#define PPTP_FRAME_ASYNC	1
+#define PPTP_FRAME_SYNC		2
+#define PPTP_FRAME_ANY          3
+
+/* (Bearer capabilities for msg sender) */
+#define PPTP_BEARER_ANALOG	1
+#define PPTP_BEARER_DIGITAL 	2
+#define PPTP_BEARER_ANY		3
+
+#define PPTP_RESULT_GENERAL_ERROR 2
+
+/* (Reasons to close a connection) */
+#define PPTP_STOP_NONE		  1 /* no good reason                        */
+#define PPTP_STOP_PROTOCOL	  2 /* can't support peer's protocol version */
+#define PPTP_STOP_LOCAL_SHUTDOWN  3 /* requester is being shut down          */
+
+/* PPTP datagram structures (all data in network byte order): ----------*/
+
+struct pptp_header {
+  u_int16_t length;	  /* message length in octets, including header */
+  u_int16_t pptp_type;	  /* PPTP message type. 1 for control message.  */
+  u_int32_t magic;	  /* this should be PPTP_MAGIC.                 */
+  u_int16_t ctrl_type;	  /* Control message type (0-15)                */
+  u_int16_t reserved0;	  /* reserved.  MUST BE ZERO.                   */
+};
+
+struct pptp_start_ctrl_conn { /* for control message types 1 and 2 */
+  struct pptp_header header;
+
+  u_int16_t version;      /* PPTP protocol version.  = PPTP_VERSION     */
+  u_int8_t  result_code;  /* these two fields should be zero on rqst msg*/
+  u_int8_t  error_code;   /* 0 unless result_code==2 (General Error)    */
+  u_int32_t framing_cap;  /* Framing capabilities                       */
+  u_int32_t bearer_cap;   /* Bearer Capabilities                        */
+  u_int16_t max_channels; /* Maximum Channels (=0 for PNS, PAC ignores) */
+  u_int16_t firmware_rev; /* Firmware or Software Revision              */
+  u_int8_t  hostname[64]; /* Host Name (64 octets, zero terminated)     */
+  u_int8_t  vendor[64];   /* Vendor string (64 octets, zero term.)      */
+  /* MS says that end of hostname/vendor fields should be filled with   */
+  /* octets of value 0, but Win95 PPTP driver doesn't do this.          */
+};
+
+struct pptp_stop_ctrl_conn { /* for control message types 3 and 4 */
+  struct pptp_header header;
+
+  u_int8_t reason_result; /* reason for rqst, result for rply          */
+  u_int8_t error_code;	  /* MUST be 0, unless rply result==2 (general err)*/
+  u_int16_t reserved1;    /* MUST be 0                                */
+};
+
+struct pptp_echo_rqst { /* for control message type 5 */
+  struct pptp_header header;
+  u_int32_t identifier;   /* arbitrary value set by sender which is used */
+                          /* to match up reply and request               */
+};
+
+struct pptp_echo_rply { /* for control message type 6 */
+  struct pptp_header header;
+  u_int32_t identifier;	  /* should correspond to id of rqst             */
+  u_int8_t result_code;
+  u_int8_t error_code;    /* =0, unless result_code==2 (general error)   */
+  u_int16_t reserved1;    /* MUST BE ZERO                                */
+};
+
+struct pptp_out_call_rqst { /* for control message type 7 */
+  struct pptp_header header;
+  u_int16_t call_id;	  /* Call ID (unique id used to multiplex data)  */
+  u_int16_t call_sernum;  /* Call Serial Number (used for logging)       */
+  u_int32_t bps_min;      /* Minimum BPS (lowest acceptable line speed)  */
+  u_int32_t bps_max;	  /* Maximum BPS (highest acceptable line speed) */
+  u_int32_t bearer;	  /* Bearer type                                 */
+  u_int32_t framing;      /* Framing type                                */
+  u_int16_t recv_size;	  /* Recv. Window Size (no. of buffered packets) */
+  u_int16_t delay;	  /* Packet Processing Delay (in 1/10 sec)       */
+  u_int16_t phone_len;	  /* Phone Number Length (num. of valid digits)  */
+  u_int16_t reserved1;    /* MUST BE ZERO				 */
+  u_int8_t  phone_num[64]; /* Phone Number (64 octets, null term.)       */
+  u_int8_t subaddress[64]; /* Subaddress (64 octets, null term.)         */
+};
+
+struct pptp_out_call_rply { /* for control message type 8 */
+  struct pptp_header header;
+  u_int16_t call_id;      /* Call ID (used to multiplex data over tunnel)*/
+  u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+  u_int8_t  result_code;  /* Result Code (1 is no errors)                */
+  u_int8_t  error_code;   /* Error Code (=0 unless result_code==2)       */
+  u_int16_t cause_code;   /* Cause Code (addt'l failure information)     */
+  u_int32_t speed;        /* Connect Speed (in BPS)                      */
+  u_int16_t recv_size;    /* Recv. Window Size (no. of buffered packets) */
+  u_int16_t delay;	  /* Packet Processing Delay (in 1/10 sec)       */
+  u_int32_t channel;      /* Physical Channel ID (for logging)           */
+};
+
+struct pptp_in_call_rqst { /* for control message type 9 */
+  struct pptp_header header;
+  u_int16_t call_id;	  /* Call ID (unique id used to multiplex data)  */
+  u_int16_t call_sernum;  /* Call Serial Number (used for logging)       */
+  u_int32_t bearer;	  /* Bearer type                                 */
+  u_int32_t channel;      /* Physical Channel ID (for logging)           */
+  u_int16_t dialed_len;   /* Dialed Number Length (# of valid digits)    */
+  u_int16_t dialing_len;  /* Dialing Number Length (# of valid digits)   */
+  u_int8_t dialed_num[64]; /* Dialed Number (64 octets, zero term.)      */
+  u_int8_t dialing_num[64]; /* Dialing Number (64 octets, zero term.)    */
+  u_int8_t subaddress[64];  /* Subaddress (64 octets, zero term.)        */
+};
+
+struct pptp_in_call_rply { /* for control message type 10 */
+  struct pptp_header header;
+  u_int16_t call_id;      /* Call ID (used to multiplex data over tunnel)*/
+  u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+  u_int8_t  result_code;  /* Result Code (1 is no errors)                */
+  u_int8_t  error_code;   /* Error Code (=0 unless result_code==2)       */
+  u_int16_t recv_size;    /* Recv. Window Size (no. of buffered packets) */
+  u_int16_t delay;	  /* Packet Processing Delay (in 1/10 sec)       */
+  u_int16_t reserved1;    /* MUST BE ZERO                                */
+};
+
+struct pptp_in_call_connect { /* for control message type 11 */
+  struct pptp_header header;
+  u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+  u_int16_t reserved1;    /* MUST BE ZERO                                */
+  u_int32_t speed;        /* Connect Speed (in BPS)                      */
+  u_int16_t recv_size;    /* Recv. Window Size (no. of buffered packets) */
+  u_int16_t delay;	  /* Packet Processing Delay (in 1/10 sec)       */
+  u_int32_t framing;      /* Framing type                                */
+};
+
+struct pptp_call_clear_rqst { /* for control message type 12 */
+  struct pptp_header header;
+  u_int16_t call_id;      /* Call ID (used to multiplex data over tunnel)*/
+  u_int16_t reserved1;    /* MUST BE ZERO                                */
+};
+
+struct pptp_call_clear_ntfy { /* for control message type 13 */
+  struct pptp_header header;
+  u_int16_t call_id;      /* Call ID (used to multiplex data over tunnel)*/
+  u_int8_t  result_code;  /* Result Code                                 */
+  u_int8_t  error_code;   /* Error Code (=0 unless result_code==2)       */
+  u_int16_t cause_code;   /* Cause Code (for ISDN, is Q.931 cause code)  */
+  u_int16_t reserved1;    /* MUST BE ZERO                                */
+  u_int8_t call_stats[128]; /* Call Statistics: 128 octets, ascii, 0-term */
+};
+
+struct pptp_wan_err_ntfy {    /* for control message type 14 */
+  struct pptp_header header;
+  u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst)*/
+  u_int16_t reserved1;    /* MUST BE ZERO                                */
+  u_int32_t crc_errors;   /* CRC errors 				 */
+  u_int32_t frame_errors; /* Framing errors 				 */
+  u_int32_t hard_errors;  /* Hardware overruns 				 */
+  u_int32_t buff_errors;  /* Buffer overruns				 */
+  u_int32_t time_errors;  /* Time-out errors				 */
+  u_int32_t align_errors; /* Alignment errors				 */
+};
+
+struct pptp_set_link_info {   /* for control message type 15 */
+  struct pptp_header header;
+  u_int16_t call_id_peer; /* Peer's Call ID (call_id of pptp_out_call_rqst) */
+  u_int16_t reserved1;    /* MUST BE ZERO                                   */
+  u_int32_t send_accm;    /* Send ACCM (for PPP packets; default 0xFFFFFFFF)*/
+  u_int32_t recv_accm;    /* Receive ACCM (for PPP pack.;default 0xFFFFFFFF)*/
+};
+
+/* helpful #defines: -------------------------------------------- */
+#define pptp_isvalid_ctrl(header, type, length) \
+ (!( ( ntoh16(((struct pptp_header *)header)->length)    < (length)  ) ||   \
+     ( ntoh16(((struct pptp_header *)header)->pptp_type) !=(type)    ) ||   \
+     ( ntoh32(((struct pptp_header *)header)->magic)     !=PPTP_MAGIC) ||   \
+     ( ntoh16(((struct pptp_header *)header)->ctrl_type) > PPTP_SET_LINK_INFO) || \
+     ( ntoh16(((struct pptp_header *)header)->reserved0) !=0         ) ))
+
+#define PPTP_HEADER_CTRL(type)  \
+{ hton16(PPTP_CTRL_SIZE(type)), \
+  hton16(PPTP_MESSAGE_CONTROL), \
+  hton32(PPTP_MAGIC),           \
+  hton16(type), 0 }             
+
+#define PPTP_CTRL_SIZE(type) ( \
+(type==PPTP_START_CTRL_CONN_RQST)?sizeof(struct pptp_start_ctrl_conn):	\
+(type==PPTP_START_CTRL_CONN_RPLY)?sizeof(struct pptp_start_ctrl_conn):	\
+(type==PPTP_STOP_CTRL_CONN_RQST )?sizeof(struct pptp_stop_ctrl_conn):	\
+(type==PPTP_STOP_CTRL_CONN_RPLY )?sizeof(struct pptp_stop_ctrl_conn):	\
+(type==PPTP_ECHO_RQST           )?sizeof(struct pptp_echo_rqst):	\
+(type==PPTP_ECHO_RPLY           )?sizeof(struct pptp_echo_rply):	\
+(type==PPTP_OUT_CALL_RQST       )?sizeof(struct pptp_out_call_rqst):	\
+(type==PPTP_OUT_CALL_RPLY       )?sizeof(struct pptp_out_call_rply):	\
+(type==PPTP_IN_CALL_RQST        )?sizeof(struct pptp_in_call_rqst):	\
+(type==PPTP_IN_CALL_RPLY        )?sizeof(struct pptp_in_call_rply):	\
+(type==PPTP_IN_CALL_CONNECT     )?sizeof(struct pptp_in_call_connect):	\
+(type==PPTP_CALL_CLEAR_RQST     )?sizeof(struct pptp_call_clear_rqst):	\
+(type==PPTP_CALL_CLEAR_NTFY     )?sizeof(struct pptp_call_clear_ntfy):	\
+(type==PPTP_WAN_ERR_NTFY        )?sizeof(struct pptp_wan_err_ntfy):	\
+(type==PPTP_SET_LINK_INFO       )?sizeof(struct pptp_set_link_info):	\
+0)
+#define max(a,b) (((a)>(b))?(a):(b))
+#define PPTP_CTRL_SIZE_MAX (			\
+max(sizeof(struct pptp_start_ctrl_conn),	\
+max(sizeof(struct pptp_echo_rqst),		\
+max(sizeof(struct pptp_echo_rply),		\
+max(sizeof(struct pptp_out_call_rqst),		\
+max(sizeof(struct pptp_out_call_rply),		\
+max(sizeof(struct pptp_in_call_rqst),		\
+max(sizeof(struct pptp_in_call_rply),		\
+max(sizeof(struct pptp_in_call_connect),	\
+max(sizeof(struct pptp_call_clear_rqst),	\
+max(sizeof(struct pptp_call_clear_ntfy),	\
+max(sizeof(struct pptp_wan_err_ntfy),		\
+max(sizeof(struct pptp_set_link_info), 0)))))))))))))
+
+
+/* gre header structure: -------------------------------------------- */
+
+#define PPTP_GRE_PROTO  0x880B
+#define PPTP_GRE_VER    0x1
+
+#define PPTP_GRE_FLAG_C	0x80
+#define PPTP_GRE_FLAG_R	0x40
+#define PPTP_GRE_FLAG_K	0x20
+#define PPTP_GRE_FLAG_S	0x10
+#define PPTP_GRE_FLAG_A	0x80
+
+#define PPTP_GRE_IS_C(f) ((f)&PPTP_GRE_FLAG_C)
+#define PPTP_GRE_IS_R(f) ((f)&PPTP_GRE_FLAG_R)
+#define PPTP_GRE_IS_K(f) ((f)&PPTP_GRE_FLAG_K)
+#define PPTP_GRE_IS_S(f) ((f)&PPTP_GRE_FLAG_S)
+#define PPTP_GRE_IS_A(f) ((f)&PPTP_GRE_FLAG_A)
+
+struct pptp_gre_header {
+  u_int8_t flags;		/* bitfield */
+  u_int8_t ver;			/* should be PPTP_GRE_VER (enhanced GRE) */
+  u_int16_t protocol;		/* should be PPTP_GRE_PROTO (ppp-encaps) */
+  u_int16_t payload_len;	/* size of ppp payload, not inc. gre header */
+  u_int16_t call_id;		/* peer's call_id for this session */
+  u_int32_t seq;		/* sequence number.  Present if S==1 */
+  u_int32_t ack;		/* seq number of highest packet recieved by */
+  				/*  sender in this session */
+};
+
+#endif /* INC_PPTP_H */
diff --git a/pppd_plugin/src/pptp_options.h b/pppd_plugin/src/pptp_options.h
new file mode 100644
index 0000000..ebc1c31
--- /dev/null
+++ b/pppd_plugin/src/pptp_options.h
@@ -0,0 +1,41 @@
+/* pptp_options.h ...... various constants used in the PPTP protocol.
+ *                       #define STANDARD to emulate NT 4.0 exactly.
+ *                       C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: pptp_options.h,v 1.3 2004/11/09 01:42:32 quozl Exp $
+ */
+
+#ifndef INC_PPTP_OPTIONS_H
+#define INC_PPTP_OPTIONS_H
+
+#undef  PPTP_FIRMWARE_STRING
+#undef  PPTP_FIRMWARE_VERSION
+#define PPTP_BUF_MAX 65536
+#define PPTP_TIMEOUT 60 /* seconds */
+extern int idle_wait;
+extern int max_echo_wait;
+#define PPTP_CONNECT_SPEED 1000000000
+#define PPTP_WINDOW 3
+#define PPTP_DELAY  0
+#define PPTP_BPS_MIN 2400
+#define PPTP_BPS_MAX 1000000000
+
+#ifndef STANDARD
+#define PPTP_MAX_CHANNELS 65535
+#define PPTP_FIRMWARE_STRING "0.01"
+#define PPTP_FIRMWARE_VERSION 0x001
+#define PPTP_HOSTNAME {'l','o','c','a','l',0}
+#define PPTP_VENDOR   {'c','a','n','a','n','i','a','n',0}
+#define PPTP_FRAME_CAP  PPTP_FRAME_ANY
+#define PPTP_BEARER_CAP PPTP_BEARER_ANY
+#else
+#define PPTP_MAX_CHANNELS 5
+#define PPTP_FIRMWARE_STRING "0.01"
+#define PPTP_FIRMWARE_VERSION 0
+#define PPTP_HOSTNAME {'l','o','c','a','l',0}
+#define PPTP_VENDOR   {'N','T',0}
+#define PPTP_FRAME_CAP  2
+#define PPTP_BEARER_CAP 1
+#endif
+
+#endif /* INC_PPTP_OPTIONS_H */
diff --git a/pppd_plugin/src/pptp_quirks.c b/pppd_plugin/src/pptp_quirks.c
new file mode 100644
index 0000000..e4c9013
--- /dev/null
+++ b/pppd_plugin/src/pptp_quirks.c
@@ -0,0 +1,54 @@
+/* pptp_quirks.c ...... various options to fix quirks found in buggy adsl modems
+ *                      mulix <mulix@actcom.co.il>
+ *
+ * $Id: pptp_quirks.c,v 1.2 2001/11/23 03:42:51 quozl Exp $
+ */
+
+#include <string.h>
+#include "orckit_quirks.h"
+#include "pptp_quirks.h"
+
+static int quirk_index = -1;
+
+struct pptp_fixup pptp_fixups[] = {
+    {BEZEQ_ISRAEL, ORCKIT, ORCKIT_ATUR3,
+     orckit_atur3_build_hook,
+     orckit_atur3_start_ctrl_conn_hook,
+     orckit_atur3_set_link_hook}
+};
+
+static int fixups_sz = sizeof(pptp_fixups)/sizeof(pptp_fixups[0]);
+
+/* return 0 on success, non 0 otherwise */
+int set_quirk_index(int index)
+{
+    if (index >= 0 && index < fixups_sz) {
+	quirk_index = index;
+	return 0;
+    }
+
+    return -1;
+}
+
+int get_quirk_index()
+{
+    return quirk_index;
+}
+
+/* return the index for this isp in the quirks table, -1 if not found */
+int find_quirk(const char* isp_name)
+{
+    int i = 0;
+    if (isp_name) {
+	while (i < fixups_sz && pptp_fixups[i].isp) {
+	    if (!strcmp(pptp_fixups[i].isp, isp_name)) {
+		return i;
+	    }
+	    ++i;
+	}
+    }
+
+    return -1;
+}
+
+
diff --git a/pppd_plugin/src/pptp_quirks.h b/pppd_plugin/src/pptp_quirks.h
new file mode 100644
index 0000000..291f3d6
--- /dev/null
+++ b/pppd_plugin/src/pptp_quirks.h
@@ -0,0 +1,59 @@
+/* pptp_quirks.h ...... various options to fix quirks found in buggy adsl modems
+ *                      mulix <mulix@actcom.co.il>
+ *
+ * $Id: pptp_quirks.h,v 1.1 2001/11/20 06:30:10 quozl Exp $
+ */
+
+#ifndef INC_PPTP_QUIRKS_H
+#define INC_PPTP_QUIRKS_H
+
+/* isp defs - correspond to slots in the fixups table */
+#define BEZEQ_ISRAEL "BEZEQ_ISRAEL"
+
+/* vendor defs */
+
+#define ORCKIT 1
+#define ALCATEL 2
+
+/* device defs */
+
+#define ORCKIT_ATUR2 1
+#define ORCKIT_ATUR3 2
+
+#include "pptp_msg.h"
+#include "pptp_ctrl.h"
+
+struct pptp_fixup {
+    const char* isp;    /* which isp? e.g. Bezeq in Israel */
+    int vendor; /* which vendor? e.g. Orckit */
+    int device; /* which device? e.g. Orckit Atur3 */
+
+    /* use this hook to build your own out call request packet */
+    int (*out_call_rqst_hook)(struct pptp_out_call_rqst* packet);
+
+    /* use this hook to build your own start control connection packet */
+    /* note that this hook is called from two different places, depending
+       on whether this is a request or reply */
+    int (*start_ctrl_conn)(struct pptp_start_ctrl_conn* packet);
+
+    /* use this hook if you need to send a 'set_link' packet once
+       the connection is established */
+    int (*set_link_hook)(struct pptp_set_link_info* packet,
+			 int peer_call_id);
+};
+
+extern struct pptp_fixup pptp_fixups[];
+
+/* find the index for this isp in the quirks table */
+/* return the index on success, -1 if not found */
+int find_quirk(const char* isp_name);
+
+/* set the global quirk index. return 0 on success, non 0 otherwise */
+int set_quirk_index(int index);
+
+/* get the global quirk index. return the index on success,
+   -1 if no quirk is defined */
+int get_quirk_index();
+
+
+#endif /* INC_PPTP_QUIRKS_H */
diff --git a/pppd_plugin/src/util.c b/pppd_plugin/src/util.c
new file mode 100644
index 0000000..dabddbe
--- /dev/null
+++ b/pppd_plugin/src/util.c
@@ -0,0 +1,158 @@
+/* util.c ....... error message utilities.
+ *                C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: util.c,v 1.11 2005/08/22 00:49:48 quozl Exp $
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "util.h"
+
+#ifndef PROGRAM_NAME
+#define PROGRAM_NAME "pptp"
+#endif
+
+/* implementation of log_string, defined as extern in util.h */
+char *log_string = "anon";
+
+static void open_log(void) __attribute__ ((constructor));
+static void close_log(void) __attribute__ ((destructor));
+
+#define MAKE_STRING(label) 				\
+va_list ap;						\
+char buf[256], string[256];				\
+va_start(ap, format);					\
+vsnprintf(buf, sizeof(buf), format, ap);		\
+snprintf(string, sizeof(string), "%s %s[%s:%s:%d]: %s",	\
+	 log_string, label, func, file, line, buf);	\
+va_end(ap)
+
+/*** open log *****************************************************************/
+static void open_log(void) {
+    openlog(PROGRAM_NAME, LOG_PID, LOG_DAEMON);
+}
+
+/*** close log ****************************************************************/
+static void close_log(void)
+{
+    closelog();
+}
+
+/*** print a message to syslog ************************************************/
+void _log(const char *func, const char *file, int line, const char *format, ...)
+{
+    MAKE_STRING("log");
+    open_log();
+    syslog(LOG_NOTICE, "%s", string);
+    close_log();
+}
+
+/*** print a warning to syslog ************************************************/
+void _warn(const char *func, const char *file, int line, const char *format, ...)
+{
+    MAKE_STRING("warn");
+    open_log();
+    fprintf(stderr, "%s\n", string);
+    syslog(LOG_WARNING, "%s", string);
+    close_log();
+}
+
+/*** print a fatal warning to syslog and exit *********************************/
+void _fatal(const char *func, const char *file, int line, const char *format, ...)
+{
+    MAKE_STRING("fatal");
+    fprintf(stderr, "%s\n", string);
+    syslog(LOG_CRIT, "%s", string);
+    exit(1);
+}
+
+/*** connect a file to a file descriptor **************************************/
+int file2fd(const char *path, const char *mode, int fd)
+{
+    int ok = 0;
+    FILE *file = NULL;
+    file = fopen(path, mode);
+    if (file != NULL && dup2(fileno(file), fd) != -1)
+        ok = 1;
+    if (file) fclose(file);
+    return ok;
+}
+
+/* signal to pipe delivery implementation */
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <string.h>
+
+/* pipe private to process */
+static int sigpipe[2];
+
+/* create a signal pipe, returns 0 for success, -1 with errno for failure */
+int sigpipe_create()
+{
+  int rc;
+  
+  rc = pipe(sigpipe);
+  if (rc < 0) return rc;
+  
+  fcntl(sigpipe[0], F_SETFD, FD_CLOEXEC);
+  fcntl(sigpipe[1], F_SETFD, FD_CLOEXEC);
+  
+#ifdef O_NONBLOCK
+#define FLAG_TO_SET O_NONBLOCK
+#else
+#ifdef SYSV
+#define FLAG_TO_SET O_NDELAY
+#else /* BSD */
+#define FLAG_TO_SET FNDELAY
+#endif
+#endif
+  
+  rc = fcntl(sigpipe[1], F_GETFL);
+  if (rc != -1)
+    rc = fcntl(sigpipe[1], F_SETFL, rc | FLAG_TO_SET);
+  if (rc < 0) return rc;
+  return 0;
+#undef FLAG_TO_SET
+}
+
+/* generic handler for signals, writes signal number to pipe */
+void sigpipe_handler(int signum)
+{
+  write(sigpipe[1], &signum, sizeof(signum));
+  signal(signum, sigpipe_handler);
+}
+
+/* assign a signal number to the pipe */
+void sigpipe_assign(int signum)
+{
+  struct sigaction sa;
+
+  memset(&sa, 0, sizeof(sa));
+  sa.sa_handler = sigpipe_handler;
+  sigaction(signum, &sa, NULL);
+}
+
+/* return the signal pipe read file descriptor for select(2) */
+int sigpipe_fd()
+{
+  return sigpipe[0];
+}
+
+/* read and return the pending signal from the pipe */
+int sigpipe_read()
+{
+  int signum;
+  read(sigpipe[0], &signum, sizeof(signum));
+  return signum;
+}
+
+void sigpipe_close()
+{
+  close(sigpipe[0]);
+  close(sigpipe[1]);
+}
+
diff --git a/pppd_plugin/src/util.h b/pppd_plugin/src/util.h
new file mode 100644
index 0000000..1ed5079
--- /dev/null
+++ b/pppd_plugin/src/util.h
@@ -0,0 +1,54 @@
+/* util.h ....... error message utilities.
+ *                C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: util.h,v 1.6 2005/03/10 01:18:20 quozl Exp $
+ */
+
+#ifndef INC_UTIL_H
+#define INC_UTIL_H
+
+/* log_string is an identifier for this pptp process, passed from
+   command line using --log-string=X, and included with every log message.
+   Useful for people with multiple pptp sessions open at a time */
+extern char * log_string;
+
+/* log_level sets the logging verbosity. Values range from 0 (errors only)
+   to 1 (errors and warnings) to 2 (high verbosity, for debugging) */
+extern int    log_level;
+
+void _log(const char *func, const char *file, int line, const char *format, ...)
+     __attribute__ ((format (printf, 4, 5)));
+void _warn(const char *func, const char *file, int line, const char *format, ...)
+     __attribute__ ((format (printf, 4, 5)));
+void _fatal(const char *func, const char *file, int line, const char *format, ...)
+     __attribute__ ((format (printf, 4, 5))) __attribute__ ((noreturn));
+
+#define log(format, args...) \
+	_log(__FUNCTION__,__FILE__,__LINE__, format , ## args)
+#define warn(format, args...) \
+	_warn(__FUNCTION__,__FILE__,__LINE__, format , ## args)
+#define fatal(format, args...) \
+	_fatal(__FUNCTION__,__FILE__,__LINE__, format , ## args)
+
+int file2fd(const char *path, const char *mode, int fd);
+
+/* signal to pipe delivery implementation */
+
+/* create a signal pipe, returns 0 for success, -1 with errno for failure */
+int sigpipe_create();
+
+/* generic handler for signals, writes signal number to pipe */
+void sigpipe_handler(int signum);
+
+/* assign a signal number to the pipe */
+void sigpipe_assign(int signum);
+
+/* return the signal pipe read file descriptor for select(2) */
+int sigpipe_fd();
+
+/* read and return the pending signal from the pipe */
+int sigpipe_read();
+
+void sigpipe_close();
+
+#endif /* INC_UTIL_H */
diff --git a/pppd_plugin/src/vector.c b/pppd_plugin/src/vector.c
new file mode 100644
index 0000000..a26c5de
--- /dev/null
+++ b/pppd_plugin/src/vector.c
@@ -0,0 +1,209 @@
+/* vector.c ..... store a vector of PPTP_CALL information and search it
+ *                efficiently.
+ *                C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: vector.c,v 1.3 2003/06/17 10:12:55 reink Exp $
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include "pptp_ctrl.h"
+#include "vector.h"
+/* #define VECTOR_DEBUG */
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+struct vector_item {
+    int key;
+    PPTP_CALL *call;
+};
+
+struct vector_struct {
+    struct vector_item *item;
+    int size;
+    int alloc;
+#ifdef VECTOR_DEBUG
+    int key_max;
+#endif
+};
+
+static struct vector_item *binary_search(VECTOR *v, int key);
+
+/*** vector_create ************************************************************/
+VECTOR *vector_create()
+{
+    const int INITIAL_SIZE = 4;
+
+    VECTOR *v = malloc(sizeof(*v));
+    if (v == NULL) return v;
+
+    v->size = 0;
+    v->alloc = INITIAL_SIZE;
+    v->item = malloc(sizeof(*(v->item)) * (v->alloc));
+#ifdef VECTOR_DEBUG
+    v->key_max = -1;
+#endif
+    if (v->item == NULL) { free(v); return NULL; }
+    else return v;
+}
+
+/*** vector_destroy ***********************************************************/
+void vector_destroy(VECTOR *v)
+{
+    free(v->item);
+#ifdef VECTOR_DEBUG
+    v->item = NULL;
+#endif
+    free(v);
+}
+
+/*** vector_size **************************************************************/
+int vector_size(VECTOR *v)
+{
+    assert(v != NULL);
+    return v->size;
+}
+
+/*** vector_insert*************************************************************
+ * nice thing about file descriptors is that we are assured by POSIX 
+ * that they are monotonically increasing.
+ */
+int vector_insert(VECTOR *v, int key, PPTP_CALL * call)
+{
+    int i;
+    assert(v != NULL && call != NULL);
+    assert(!vector_contains(v, key));
+#ifdef VECTOR_DEBUG
+    assert(v->key_max < key);
+#endif
+    if (!(v->size < v->alloc)) {
+        void *tmp = realloc(v->item, sizeof(*(v->item)) * 2 * v->alloc);
+        if (tmp != NULL) {
+            v->alloc *= 2;
+            v->item = tmp;
+        } else return FALSE; /* failed to alloc memory. */
+    }
+    assert(v->size < v->alloc);
+    /* for safety, we make this work in the general case;
+     * but this is optimized for adding call to the end of the vector.
+     */
+    for(i = v->size - 1; i >= 0; i--)
+        if (v->item[i].key < key)
+            break;
+    /* insert after item i */
+    memmove(&v->item[i + 2], &v->item[i + 1],
+            (v->size - i - 1) * sizeof(*(v->item)));
+    v->item[i + 1].key  = key;
+    v->item[i + 1].call = call;
+    v->size++;
+#ifdef VECTOR_DEBUG
+    if (v->key_max < key) /* ie, always. */
+        v->key_max = key;
+#endif
+    return TRUE;
+}
+
+/*** vector_remove ************************************************************/
+int  vector_remove(VECTOR *v, int key)
+{
+    struct vector_item *tmp;
+    assert(v != NULL);
+    if ((tmp =binary_search(v,key)) == NULL) return FALSE;
+    assert(tmp >= v->item && tmp < v->item + v->size);
+    memmove(tmp, tmp + 1, (v->size - (v->item - tmp) - 1) * sizeof(*(v->item)));
+    v->size--;
+    return TRUE;
+}
+
+/*** vector_search ************************************************************/
+int  vector_search(VECTOR *v, int key, PPTP_CALL **call)
+{
+    struct vector_item *tmp;
+    assert(v != NULL);
+    tmp = binary_search(v, key);
+    if (tmp ==NULL) return FALSE;
+    *call = tmp->call;
+    return TRUE;
+}
+
+/*** vector_contains **********************************************************/
+int  vector_contains(VECTOR *v, int key)
+{
+    assert(v != NULL);
+    return (binary_search(v, key) != NULL);
+}
+
+/*** vector_item **************************************************************/
+static struct vector_item *binary_search(VECTOR *v, int key)
+{
+    int l,r,x;
+    l = 0;
+    r = v->size - 1;
+    while (r >= l) {
+        x = (l + r)/2;
+        if (key <  v->item[x].key) r = x - 1; else l = x + 1;
+        if (key == v->item[x].key) return &(v->item[x]);
+    }
+    return NULL;
+}
+
+/*** vector_scan ***************************************************************
+ * Hmm.  Let's be fancy and use a binary search for the first
+ * unused key, taking advantage of the list is stored sorted; ie
+ * we can look at pointers and keys at two different locations, 
+ * and if (ptr1 - ptr2) = (key1 - key2) then all the slots
+ * between ptr1 and ptr2 are filled.  Note that ptr1-ptr2 should
+ * never be greater than key1-key2 (no duplicate keys!)... we
+ * check for this.
+ */
+int vector_scan(VECTOR *v, int lo, int hi, int *key)
+{
+    int l,r,x;
+    assert(v != NULL);
+    assert(key != NULL);
+    if ((v->size<1) || (lo < v->item[0].key)) { *key = lo; return TRUE; }
+    /* our array bounds */
+    l = 0;  r = v->size - 1;
+    while (r > l) {
+        /* check for a free spot right after l */
+        if (v->item[l].key + 1 < v->item[l + 1].key) { /* found it! */
+            *key = v->item[l].key + 1;
+            return TRUE;
+        }
+        /* no dice. Let's see if the free spot is before or after the midpoint */
+        x = (l + r)/2;
+        /* Okay, we have right (r), left (l) and the probe (x). */
+        assert(x - l <= v->item[x].key - v->item[l].key);
+        assert(r - x <= v->item[r].key - v->item[x].key);
+        if (x - l < v->item[x].key - v->item[l].key)
+            /* room between l and x */
+            r = x;
+        else /* no room between l and x */
+            if (r - x < v->item[r].key - v->item[x].key)
+                /* room between x and r */
+                l = x;
+            else /* no room between x and r, either */
+                break; /* game over, man. */
+    }
+    /* no room found in already allocated space.  Check to see if
+     * there's free space above allocated entries. */
+    if (v->item[v->size - 1].key < hi) {
+        *key = v->item[v->size - 1].key + 1;
+        return TRUE;
+    }
+    /* outta luck */
+    return FALSE;
+}
+
+/*** vector_get_Nth ***********************************************************/
+PPTP_CALL * vector_get_Nth(VECTOR *v, int n)
+{
+    assert(v != NULL);
+    assert(0 <= n && n < vector_size(v));
+    return v->item[n].call;
+}
diff --git a/pppd_plugin/src/vector.h b/pppd_plugin/src/vector.h
new file mode 100644
index 0000000..b18899f
--- /dev/null
+++ b/pppd_plugin/src/vector.h
@@ -0,0 +1,31 @@
+/* vector.h ..... store a vector of PPTP_CALL information and search it
+ *                efficiently.
+ *                C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: vector.h,v 1.1.1.1 2000/12/23 08:19:51 scott Exp $
+ */
+
+#ifndef INC_VECTOR_H
+#define INC_VECTOR_H
+
+#include "pptp_ctrl.h" /* for definition of PPTP_CALL */
+
+typedef struct vector_struct VECTOR;
+
+VECTOR *vector_create();
+void vector_destroy(VECTOR *v);
+
+int vector_size(VECTOR *v);
+
+/* vector_insert and vector_search return TRUE on success, FALSE on failure. */
+int  vector_insert(VECTOR *v, int key, PPTP_CALL * call);
+int  vector_remove(VECTOR *v, int key);
+int  vector_search(VECTOR *v, int key, PPTP_CALL ** call);
+/* vector_contains returns FALSE if not found, TRUE if found. */
+int  vector_contains(VECTOR *v, int key);
+/* find first unused key. Returns TRUE on success, FALSE if no. */
+int  vector_scan(VECTOR *v, int lo, int hi, int *key);
+/* get a specific PPTP_CALL ... useful only when iterating. */
+PPTP_CALL * vector_get_Nth(VECTOR *v, int n);
+
+#endif /* INC_VECTOR_H */