diff options
Diffstat (limited to 'src/libcharon/plugins/lookip')
| -rw-r--r-- | src/libcharon/plugins/lookip/Makefile.am | 21 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/Makefile.in | 693 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip.c | 261 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip_listener.c | 327 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip_listener.h | 88 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip_msg.h | 96 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip_plugin.c | 83 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip_plugin.h | 42 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip_socket.c | 461 | ||||
| -rw-r--r-- | src/libcharon/plugins/lookip/lookip_socket.h | 44 |
10 files changed, 2116 insertions, 0 deletions
diff --git a/src/libcharon/plugins/lookip/Makefile.am b/src/libcharon/plugins/lookip/Makefile.am new file mode 100644 index 000000000..450995c9c --- /dev/null +++ b/src/libcharon/plugins/lookip/Makefile.am @@ -0,0 +1,21 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \ + -I$(top_srcdir)/src/libcharon + +AM_CFLAGS = -rdynamic \ + -DIPSEC_PIDDIR=\"${piddir}\" + +if MONOLITHIC +noinst_LTLIBRARIES = libstrongswan-lookip.la +else +plugin_LTLIBRARIES = libstrongswan-lookip.la +endif + +libstrongswan_lookip_la_SOURCES = lookip_plugin.h lookip_plugin.c \ + lookip_listener.h lookip_listener.c lookip_msg.h \ + lookip_socket.h lookip_socket.c + +libstrongswan_lookip_la_LDFLAGS = -module -avoid-version + +ipsec_PROGRAMS = lookip +lookip_SOURCES = lookip.c diff --git a/src/libcharon/plugins/lookip/Makefile.in b/src/libcharon/plugins/lookip/Makefile.in new file mode 100644 index 000000000..26ab61ba8 --- /dev/null +++ b/src/libcharon/plugins/lookip/Makefile.in @@ -0,0 +1,693 @@ +# Makefile.in generated by automake 1.11.3 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software +# Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +ipsec_PROGRAMS = lookip$(EXEEXT) +subdir = src/libcharon/plugins/lookip +DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/m4/config/libtool.m4 \ + $(top_srcdir)/m4/config/ltoptions.m4 \ + $(top_srcdir)/m4/config/ltsugar.m4 \ + $(top_srcdir)/m4/config/ltversion.m4 \ + $(top_srcdir)/m4/config/lt~obsolete.m4 \ + $(top_srcdir)/m4/macros/with.m4 \ + $(top_srcdir)/m4/macros/enable-disable.m4 \ + $(top_srcdir)/m4/macros/add-plugin.m4 \ + $(top_srcdir)/configure.in +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = 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'$$!N;$$!N;$$!N;$$!N;s/\n/ /g' +am__uninstall_files_from_dir = { \ + test -z "$$files" \ + || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \ + || { echo " ( cd '$$dir' && rm -f" $$files ")"; \ + $(am__cd) "$$dir" && rm -f $$files; }; \ + } +am__installdirs = "$(DESTDIR)$(plugindir)" "$(DESTDIR)$(ipsecdir)" +LTLIBRARIES = $(noinst_LTLIBRARIES) $(plugin_LTLIBRARIES) +libstrongswan_lookip_la_LIBADD = +am_libstrongswan_lookip_la_OBJECTS = lookip_plugin.lo \ + lookip_listener.lo lookip_socket.lo +libstrongswan_lookip_la_OBJECTS = \ + $(am_libstrongswan_lookip_la_OBJECTS) +libstrongswan_lookip_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \ + $(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \ + $(libstrongswan_lookip_la_LDFLAGS) $(LDFLAGS) -o $@ +@MONOLITHIC_FALSE@am_libstrongswan_lookip_la_rpath = -rpath \ +@MONOLITHIC_FALSE@ $(plugindir) +@MONOLITHIC_TRUE@am_libstrongswan_lookip_la_rpath = +PROGRAMS = $(ipsec_PROGRAMS) +am_lookip_OBJECTS = lookip.$(OBJEXT) +lookip_OBJECTS = $(am_lookip_OBJECTS) +lookip_LDADD = $(LDADD) +DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir) +depcomp = $(SHELL) $(top_srcdir)/depcomp +am__depfiles_maybe = depfiles +am__mv = mv -f +COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \ + $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ + --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \ + $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +CCLD = $(CC) +LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ + --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \ + $(LDFLAGS) -o $@ +SOURCES = $(libstrongswan_lookip_la_SOURCES) $(lookip_SOURCES) +DIST_SOURCES = $(libstrongswan_lookip_la_SOURCES) $(lookip_SOURCES) +ETAGS = etags +CTAGS = ctags +DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST) +ACLOCAL = @ACLOCAL@ +ALLOCA = @ALLOCA@ +AMTAR = @AMTAR@ +AR = @AR@ +AUTOCONF = @AUTOCONF@ +AUTOHEADER = @AUTOHEADER@ +AUTOMAKE = @AUTOMAKE@ +AWK = @AWK@ +BFDLIB = @BFDLIB@ +BTLIB = @BTLIB@ +CC = @CC@ +CCDEPMODE = @CCDEPMODE@ +CFLAGS = @CFLAGS@ +CPP = @CPP@ +CPPFLAGS = @CPPFLAGS@ +CYGPATH_W = @CYGPATH_W@ +DEFS = @DEFS@ +DEPDIR = @DEPDIR@ +DLLIB = @DLLIB@ +DLLTOOL = @DLLTOOL@ +DSYMUTIL = @DSYMUTIL@ +DUMPBIN = @DUMPBIN@ +ECHO_C = @ECHO_C@ +ECHO_N = @ECHO_N@ +ECHO_T = @ECHO_T@ +EGREP = @EGREP@ +EXEEXT = @EXEEXT@ +FGREP = @FGREP@ +GPERF = @GPERF@ +GREP = @GREP@ +INSTALL = @INSTALL@ +INSTALL_DATA = @INSTALL_DATA@ +INSTALL_PROGRAM = @INSTALL_PROGRAM@ +INSTALL_SCRIPT = @INSTALL_SCRIPT@ +INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@ +LD = @LD@ +LDFLAGS = @LDFLAGS@ +LEX = @LEX@ +LEXLIB = @LEXLIB@ +LEX_OUTPUT_ROOT = @LEX_OUTPUT_ROOT@ +LIBOBJS = @LIBOBJS@ +LIBS = @LIBS@ +LIBTOOL = @LIBTOOL@ +LIPO = @LIPO@ +LN_S = @LN_S@ +LTLIBOBJS = @LTLIBOBJS@ +MAKEINFO = @MAKEINFO@ +MANIFEST_TOOL = @MANIFEST_TOOL@ +MKDIR_P = @MKDIR_P@ +MYSQLCFLAG = @MYSQLCFLAG@ +MYSQLCONFIG = @MYSQLCONFIG@ +MYSQLLIB = @MYSQLLIB@ 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\ + install-data install-data-am install-dvi install-dvi-am \ + install-exec install-exec-am install-html install-html-am \ + install-info install-info-am install-ipsecPROGRAMS install-man \ + install-pdf install-pdf-am install-pluginLTLIBRARIES \ + install-ps install-ps-am 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-ipsecPROGRAMS \ + uninstall-pluginLTLIBRARIES + + +# 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/src/libcharon/plugins/lookip/lookip.c b/src/libcharon/plugins/lookip/lookip.c new file mode 100644 index 000000000..9887a3a92 --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip.c @@ -0,0 +1,261 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "lookip_msg.h" + +#include <sys/socket.h> +#include <sys/un.h> +#include <unistd.h> +#include <stddef.h> +#include <stdio.h> +#include <errno.h> +#include <getopt.h> + +/** + * Connect to the daemon, return FD + */ +static int make_connection() +{ + struct sockaddr_un addr; + int fd; + + addr.sun_family = AF_UNIX; + strcpy(addr.sun_path, LOOKIP_SOCKET); + + fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); + if (fd < 0) + { + fprintf(stderr, "opening socket failed: %s\n", strerror(errno)); + return -1; + } + if (connect(fd, (struct sockaddr *)&addr, + offsetof(struct sockaddr_un, sun_path) + strlen(addr.sun_path)) < 0) + { + fprintf(stderr, "connecting to %s failed: %s\n", + LOOKIP_SOCKET, strerror(errno)); + close(fd); + return -1; + } + return fd; +} + +/** + * Send a request message + */ +static int send_request(int fd, int type, char *vip) +{ + lookip_request_t req = { + .type = type, + }; + + if (vip) + { + snprintf(req.vip, sizeof(req.vip), "%s", vip); + } + if (send(fd, &req, sizeof(req), 0) != sizeof(req)) + { + fprintf(stderr, "writing to socket failed: %s\n", strerror(errno)); + return 2; + } + return 0; +} + +/** + * Receive entries from fd. If block is != 0, the call blocks until closed + */ +static int receive(int fd, int block, int loop) +{ + lookip_response_t resp; + char *label, name[32]; + int res; + + do + { + res = recv(fd, &resp, sizeof(resp), block ? 0 : MSG_DONTWAIT); + if (res == 0) + { /* closed by server */ + return 0; + } + if (res != sizeof(resp)) + { + if (!block && (errno == EAGAIN || errno == EWOULDBLOCK)) + { /* call would block, but we don't */ + return 0; + } + fprintf(stderr, "reading from socket failed: %s\n", strerror(errno)); + return 1; + } + switch (resp.type) + { + case LOOKIP_ENTRY: + label = "lookup:"; + break; + case LOOKIP_NOT_FOUND: + label = "not found:"; + break; + case LOOKIP_NOTIFY_UP: + label = "up:"; + break; + case LOOKIP_NOTIFY_DOWN: + label = "down:"; + break; + default: + fprintf(stderr, "received invalid message type: %d\n", resp.type); + return 1; + } + resp.vip[sizeof(resp.vip) - 1] = '\0'; + resp.ip[sizeof(resp.ip) - 1] = '\0'; + resp.id[sizeof(resp.id) - 1] = '\0'; + resp.name[sizeof(resp.name) - 1] = '\0'; + + snprintf(name, sizeof(name), "%s[%u]", resp.name, resp.unique_id); + printf("%-12s %16s %16s %20s %s\n", + label, resp.vip, resp.ip, name, resp.id); + } + while (loop); + + return 0; +} + +/** + * Interactive IP lookup shell + */ +static int interactive(int fd) +{ + printf("Enter IP address or 'quit'\n"); + + while (1) + { + char line[64], *pos; + int res; + + printf("> "); + fflush(stdout); + + if (fgets(line, sizeof(line), stdin)) + { + pos = strchr(line, '\n'); + if (pos) + { + *pos = '\0'; + } + if (strlen(line) == 0) + { + continue; + } + if (strcmp(line, "quit") == 0) + { + return send_request(fd, LOOKIP_END, NULL); + } + res = send_request(fd, LOOKIP_LOOKUP, line); + if (res != 0) + { + return res; + } + res = receive(fd, 1, 0); + if (res != 0) + { + return res; + } + } + } +} + +/** + * Print usage information + */ +static void usage(char *cmd) +{ + fprintf(stderr, "Usage:\n"); + fprintf(stderr, " %s --help\n", cmd); + fprintf(stderr, " %s --dump\n", cmd); + fprintf(stderr, " %s --lookup <IP>\n", cmd); + fprintf(stderr, " %s --listen-up\n", cmd); + fprintf(stderr, " %s --listen-down\n", cmd); + fprintf(stderr, "Any combination of options is allowed.\n"); +} + +int main(int argc, char *argv[]) +{ + int fd, res = 0, end = 0; + struct option long_opts[] = { + { "help", no_argument, NULL, 'h' }, + { "dump", no_argument, NULL, 'd' }, + { "lookup", required_argument, NULL, 'l' }, + { "listen-up", no_argument, NULL, 'u' }, + { "listen-down", no_argument, NULL, 'c' }, + { 0,0,0,0 } + }; + + fd = make_connection(); + if (fd == -1) + { + return 1; + } + + if (argc == 1) + { + res = interactive(fd); + close(fd); + return res; + } + + while (res == 0) + { + switch (getopt_long(argc, argv, "", long_opts, NULL)) + { + case EOF: + end = 1; + break; + case 'h': + usage(argv[0]); + break; + case 'd': + res = send_request(fd, LOOKIP_DUMP, NULL); + break; + case 'l': + res = send_request(fd, LOOKIP_LOOKUP, optarg); + break; + case 'u': + res = send_request(fd, LOOKIP_REGISTER_UP, NULL); + break; + case 'c': + res = send_request(fd, LOOKIP_REGISTER_DOWN, NULL); + break; + default: + usage(argv[0]); + res = 1; + break; + } + if (end) + { + break; + } + if (res == 0) + { /* read all currently available results */ + res = receive(fd, 0, 1); + } + } + if (res == 0) + { + /* send close message */ + send_request(fd, LOOKIP_END, NULL); + /* read until socket gets closed */ + res = receive(fd, 1, 1); + } + close(fd); + + return res; +} diff --git a/src/libcharon/plugins/lookip/lookip_listener.c b/src/libcharon/plugins/lookip/lookip_listener.c new file mode 100644 index 000000000..caf336a2e --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip_listener.c @@ -0,0 +1,327 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "lookip_listener.h" + +#include <daemon.h> +#include <collections/hashtable.h> +#include <collections/linked_list.h> +#include <threading/rwlock.h> + +typedef struct private_lookip_listener_t private_lookip_listener_t; + +/** + * Private data of an lookip_listener_t object. + */ +struct private_lookip_listener_t { + + /** + * Public lookip_listener_t interface. + */ + lookip_listener_t public; + + /** + * Lock for hashtable + */ + rwlock_t *lock; + + /** + * Hashtable with entries: host_t => entry_t + */ + hashtable_t *entries; + + /** + * List of registered listeners + */ + linked_list_t *listeners; +}; + +/** + * Listener entry + */ +typedef struct { + /** callback function */ + lookip_callback_t cb; + /** user data for callback */ + void *user; +} listener_entry_t; + +/** + * Hashtable entry + */ +typedef struct { + /** virtual IP, serves as lookup key */ + host_t *vip; + /** peers external address */ + host_t *other; + /** peer (EAP-)Identity */ + identification_t *id; + /** associated connection name */ + char *name; + /** IKE_SA unique identifier */ + u_int unique_id; +} entry_t; + +/** + * Destroy a hashtable entry + */ +static void entry_destroy(entry_t *entry) +{ + entry->vip->destroy(entry->vip); + entry->other->destroy(entry->other); + entry->id->destroy(entry->id); + free(entry->name); + free(entry); +} + +/** + * Hashtable hash function + */ +static u_int hash(host_t *key) +{ + return chunk_hash(key->get_address(key)); +} + +/** + * Hashtable equals function + */ +static bool equals(host_t *a, host_t *b) +{ + return a->ip_equals(a, b); +} + +/** + * Compare callback that invokes up callback of all registered listeners + */ +static bool notify_up(listener_entry_t *listener, entry_t *entry) +{ + if (!listener->cb(listener->user, TRUE, entry->vip, entry->other, + entry->id, entry->name, entry->unique_id)) + { + free(listener); + return TRUE; + } + return FALSE; +} + +/** + * Compare callback that invokes down callback of all registered listeners + */ +static bool notify_down(listener_entry_t *listener, entry_t *entry) +{ + if (!listener->cb(listener->user, FALSE, entry->vip, entry->other, + entry->id, entry->name, entry->unique_id)) + { + free(listener); + return TRUE; + } + return FALSE; +} + +/** + * Add a new entry to the hashtable + */ +static void add_entry(private_lookip_listener_t *this, ike_sa_t *ike_sa) +{ + enumerator_t *enumerator; + host_t *vip, *other; + identification_t *id; + entry_t *entry; + + enumerator = ike_sa->create_virtual_ip_enumerator(ike_sa, FALSE); + while (enumerator->enumerate(enumerator, &vip)) + { + other = ike_sa->get_other_host(ike_sa); + id = ike_sa->get_other_eap_id(ike_sa); + + INIT(entry, + .vip = vip->clone(vip), + .other = other->clone(other), + .id = id->clone(id), + .name = strdup(ike_sa->get_name(ike_sa)), + .unique_id = ike_sa->get_unique_id(ike_sa), + ); + + this->lock->read_lock(this->lock); + this->listeners->remove(this->listeners, entry, (void*)notify_up); + this->lock->unlock(this->lock); + + this->lock->write_lock(this->lock); + entry = this->entries->put(this->entries, entry->vip, entry); + this->lock->unlock(this->lock); + if (entry) + { + entry_destroy(entry); + } + } + enumerator->destroy(enumerator); +} + +/** + * Remove an entry from the hashtable + */ +static void remove_entry(private_lookip_listener_t *this, ike_sa_t *ike_sa) +{ + enumerator_t *enumerator; + host_t *vip; + entry_t *entry; + + enumerator = ike_sa->create_virtual_ip_enumerator(ike_sa, FALSE); + while (enumerator->enumerate(enumerator, &vip)) + { + this->lock->write_lock(this->lock); + entry = this->entries->remove(this->entries, vip); + this->lock->unlock(this->lock); + if (entry) + { + this->lock->read_lock(this->lock); + this->listeners->remove(this->listeners, entry, (void*)notify_down); + this->lock->unlock(this->lock); + + entry_destroy(entry); + } + } + enumerator->destroy(enumerator); +} + +METHOD(listener_t, message_hook, bool, + private_lookip_listener_t *this, ike_sa_t *ike_sa, + message_t *message, bool incoming, bool plain) +{ + if (plain && ike_sa->get_state(ike_sa) == IKE_ESTABLISHED && + !incoming && !message->get_request(message)) + { + if (ike_sa->get_version(ike_sa) == IKEV1 && + message->get_exchange_type(message) == TRANSACTION) + { + add_entry(this, ike_sa); + } + if (ike_sa->get_version(ike_sa) == IKEV2 && + message->get_exchange_type(message) == IKE_AUTH) + { + add_entry(this, ike_sa); + } + } + return TRUE; +} + +METHOD(listener_t, ike_updown, bool, + private_lookip_listener_t *this, ike_sa_t *ike_sa, bool up) +{ + if (!up) + { + remove_entry(this, ike_sa); + } + return TRUE; +} + +METHOD(listener_t, ike_rekey, bool, + private_lookip_listener_t *this, ike_sa_t *old, ike_sa_t *new) +{ + /* During IKE_SA rekey, the unique identifier changes. Fire update events + * and update the cached entry. During the invocation of this hook, the + * virtual IPs have been migrated to new, hence remove that entry. */ + remove_entry(this, new); + add_entry(this, new); + + return TRUE; +} + +METHOD(lookip_listener_t, lookup, int, + private_lookip_listener_t *this, host_t *vip, + lookip_callback_t cb, void *user) +{ + entry_t *entry; + int matches = 0; + + this->lock->read_lock(this->lock); + if (vip) + { + entry = this->entries->get(this->entries, vip); + if (entry) + { + cb(user, TRUE, entry->vip, entry->other, entry->id, + entry->name, entry->unique_id); + matches ++; + } + } + else + { + enumerator_t *enumerator; + + enumerator = this->entries->create_enumerator(this->entries); + while (enumerator->enumerate(enumerator, &vip, &entry)) + { + cb(user, TRUE, entry->vip, entry->other, entry->id, + entry->name, entry->unique_id); + matches++; + } + enumerator->destroy(enumerator); + } + this->lock->unlock(this->lock); + + return matches; +} + +METHOD(lookip_listener_t, add_listener, void, + private_lookip_listener_t *this, lookip_callback_t cb, void *user) +{ + listener_entry_t *listener; + + INIT(listener, + .cb = cb, + .user = user, + ); + + this->lock->write_lock(this->lock); + this->listeners->insert_last(this->listeners, listener); + this->lock->unlock(this->lock); +} + +METHOD(lookip_listener_t, destroy, void, + private_lookip_listener_t *this) +{ + this->listeners->destroy_function(this->listeners, free); + this->entries->destroy(this->entries); + this->lock->destroy(this->lock); + free(this); +} + +/** + * See header + */ +lookip_listener_t *lookip_listener_create() +{ + private_lookip_listener_t *this; + + INIT(this, + .public = { + .listener = { + .message = _message_hook, + .ike_updown = _ike_updown, + .ike_rekey = _ike_rekey, + }, + .lookup = _lookup, + .add_listener = _add_listener, + .destroy = _destroy, + }, + .lock = rwlock_create(RWLOCK_TYPE_DEFAULT), + .entries = hashtable_create((hashtable_hash_t)hash, + (hashtable_equals_t)equals, 32), + .listeners = linked_list_create(), + ); + + return &this->public; +} diff --git a/src/libcharon/plugins/lookip/lookip_listener.h b/src/libcharon/plugins/lookip/lookip_listener.h new file mode 100644 index 000000000..56f74ed48 --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip_listener.h @@ -0,0 +1,88 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup lookip_listener lookip_listener + * @{ @ingroup lookip + */ + +#ifndef LOOKIP_LISTENER_H_ +#define LOOKIP_LISTENER_H_ + +#include <bus/listeners/listener.h> + +typedef struct lookip_listener_t lookip_listener_t; + +/** + * Callback function to query virtual IP entries + * + * @param user user supplied pointer + * @param up TRUE if tunnels established, FALSE if closed + * @param vip virtual IP of remote peer + * @param other peer external IP + * @param id peer identity + * @param name associated connection name + * @param unique_id unique IKE_SA identifier + * @return TRUE to receive more results, FALSE to cancel + */ +typedef bool (*lookip_callback_t)(void *user, bool up, host_t *vip, + host_t *other, identification_t *id, + char *name, u_int unique_id); + +/** + * Listener collecting virtual IPs. + */ +struct lookip_listener_t { + + /** + * Implements listener_t interface. + */ + listener_t listener; + + /** + * Perform a lookup for a given virtual IP, invoke callback for matches. + * + * The "up" parameter is always TRUE when the callback is invoked using + * lookup(). + * + * @param vip virtual IP to look up, NULL to get all entries + * @param cb callback function to invoke + * @param user user data to pass to callback function + * @return number of matches + */ + int (*lookup)(lookip_listener_t *this, host_t *vip, + lookip_callback_t cb, void *user); + + /** + * Register a listener function that gets notified about virtual IP changes. + * + * @param cb callback function to invoke + * @param user user data to pass to callback function + */ + void (*add_listener)(lookip_listener_t *this, + lookip_callback_t cb, void *user); + + /** + * Destroy a lookip_listener_t. + */ + void (*destroy)(lookip_listener_t *this); +}; + +/** + * Create a lookip_listener instance. + */ +lookip_listener_t *lookip_listener_create(); + +#endif /** LOOKIP_LISTENER_H_ @}*/ diff --git a/src/libcharon/plugins/lookip/lookip_msg.h b/src/libcharon/plugins/lookip/lookip_msg.h new file mode 100644 index 000000000..d5789c29f --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip_msg.h @@ -0,0 +1,96 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup lookip_msg lookip_msg + * @{ @ingroup lookip + */ + +#ifndef LOOKIP_MSG_H_ +#define LOOKIP_MSG_H_ + +#define LOOKIP_SOCKET IPSEC_PIDDIR "/charon.lkp" + +typedef struct lookip_request_t lookip_request_t; +typedef struct lookip_response_t lookip_response_t; + +/** + * Message type. + * + * The client can send a batch of request messages, containing DUMP, LOOKUP or + * REGISTER_* messages. The server immediately starts sending responses for + * these messages, using ENTRY or NOTIFY_* messages. + * A client MUST send an END message to complete a batch. The server will + * send any remaining responses, but will not accept new requests and closes + * the connection when complete. + */ +enum { + /** request a dump of all entries */ + LOOKIP_DUMP = 1, + /** lookup a specific virtual IP */ + LOOKIP_LOOKUP, + /** reply message for DUMP and LOOKUP */ + LOOKIP_ENTRY, + /** reply message for LOOKUP if no such IP found */ + LOOKIP_NOT_FOUND, + /** register for notifications about new virtual IPs */ + LOOKIP_REGISTER_UP, + /** register for notifications about virtual IPs released */ + LOOKIP_REGISTER_DOWN, + /** notify reply message for REGISTER_UP */ + LOOKIP_NOTIFY_UP, + /** notify reply message for REGISTER_DOWN */ + LOOKIP_NOTIFY_DOWN, + /** end of request batch */ + LOOKIP_END, +}; + +/** + * Request message sent from client. + * + * Valid request message types are DUMP, LOOKUP, REGISTER_UP/DOWN and END. + * + * The vip field is used only in LOOKUP requests, but ignored otherwise. + */ +struct lookip_request_t { + /** request message type */ + int type; + /** null terminated string representation of virtual IP */ + char vip[40]; +}; + +/** + * Response message sent to client. + * + * Valid response message types are ENTRY, NOT_FOUND and NOTIFY_UP/DOWN. + * + * All fields are set in all messages, except in NOT_FOUND: Only vip is set. + */ +struct lookip_response_t { + /** response message type */ + int type; + /** null terminated string representation of virtual IP */ + char vip[40]; + /** null terminated string representation of outer IP */ + char ip[40]; + /** null terminated peer identity */ + char id[128]; + /** null terminated connection name */ + char name[40]; + /** unique connection id */ + unsigned int unique_id; +}; + +#endif /** LOOKIP_MSG_H_ @}*/ diff --git a/src/libcharon/plugins/lookip/lookip_plugin.c b/src/libcharon/plugins/lookip/lookip_plugin.c new file mode 100644 index 000000000..360864849 --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip_plugin.c @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "lookip_plugin.h" + +#include "lookip_listener.h" +#include "lookip_socket.h" + +#include <daemon.h> + +typedef struct private_lookip_plugin_t private_lookip_plugin_t; + +/** + * private data of lookip plugin + */ +struct private_lookip_plugin_t { + + /** + * implements plugin interface + */ + lookip_plugin_t public; + + /** + * Listener collecting virtual IP assignements + */ + lookip_listener_t *listener; + + /** + * UNIX socket to serve client queries + */ + lookip_socket_t *socket; +}; + +METHOD(plugin_t, get_name, char*, + private_lookip_plugin_t *this) +{ + return "lookip"; +} + +METHOD(plugin_t, destroy, void, + private_lookip_plugin_t *this) +{ + this->socket->destroy(this->socket); + charon->bus->remove_listener(charon->bus, &this->listener->listener); + this->listener->destroy(this->listener); + free(this); +} + +/** + * Plugin constructor + */ +plugin_t *lookip_plugin_create() +{ + private_lookip_plugin_t *this; + + INIT(this, + .public = { + .plugin = { + .get_name = _get_name, + .reload = (void*)return_false, + .destroy = _destroy, + }, + }, + .listener = lookip_listener_create(), + ); + + charon->bus->add_listener(charon->bus, &this->listener->listener); + this->socket = lookip_socket_create(this->listener); + + return &this->public.plugin; +} diff --git a/src/libcharon/plugins/lookip/lookip_plugin.h b/src/libcharon/plugins/lookip/lookip_plugin.h new file mode 100644 index 000000000..ea780ebe7 --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip_plugin.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup lookip lookip + * @ingroup cplugins + * + * @defgroup lookip_plugin lookip_plugin + * @{ @ingroup lookip + */ + +#ifndef LOOKIP_PLUGIN_H_ +#define LOOKIP_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct lookip_plugin_t lookip_plugin_t; + +/** + * Plugin providing fast connection lookup and notification for virtual IPs. + */ +struct lookip_plugin_t { + + /** + * Implements plugin interface. + */ + plugin_t plugin; +}; + +#endif /** LOOKIP_PLUGIN_H_ @}*/ diff --git a/src/libcharon/plugins/lookip/lookip_socket.c b/src/libcharon/plugins/lookip/lookip_socket.c new file mode 100644 index 000000000..f2a469e92 --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip_socket.c @@ -0,0 +1,461 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "lookip_socket.h" + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/socket.h> +#include <sys/un.h> +#include <unistd.h> +#include <errno.h> + +#include <daemon.h> +#include <threading/thread.h> +#include <threading/mutex.h> +#include <collections/linked_list.h> +#include <processing/jobs/callback_job.h> + +#include "lookip_msg.h" + +typedef struct private_lookip_socket_t private_lookip_socket_t; + +/** + * Private data of an lookip_socket_t object. + */ +struct private_lookip_socket_t { + + /** + * Public lookip_socket_t interface. + */ + lookip_socket_t public; + + /** + * lookip + */ + lookip_listener_t *listener; + + /** + * lookip unix socket file descriptor + */ + int socket; + + /** + * List of registered listeners, as entry_t + */ + linked_list_t *registered; + + /** + * List of connected clients, as uintptr_t FD + */ + linked_list_t *connected; + + /** + * Mutex to lock clients list + */ + mutex_t *mutex; +}; + +/** + * Open lookip unix socket + */ +static bool open_socket(private_lookip_socket_t *this) +{ + struct sockaddr_un addr; + mode_t old; + + addr.sun_family = AF_UNIX; + strcpy(addr.sun_path, LOOKIP_SOCKET); + + this->socket = socket(AF_UNIX, SOCK_SEQPACKET, 0); + if (this->socket == -1) + { + DBG1(DBG_CFG, "creating lookip socket failed"); + return FALSE; + } + unlink(addr.sun_path); + old = umask(~(S_IRWXU | S_IRWXG)); + if (bind(this->socket, (struct sockaddr*)&addr, sizeof(addr)) < 0) + { + DBG1(DBG_CFG, "binding lookip socket failed: %s", strerror(errno)); + close(this->socket); + return FALSE; + } + umask(old); + if (chown(addr.sun_path, charon->caps->get_uid(charon->caps), + charon->caps->get_gid(charon->caps)) != 0) + { + DBG1(DBG_CFG, "changing lookip socket permissions failed: %s", + strerror(errno)); + } + if (listen(this->socket, 10) < 0) + { + DBG1(DBG_CFG, "listening on lookip socket failed: %s", strerror(errno)); + close(this->socket); + unlink(addr.sun_path); + return FALSE; + } + return TRUE; +} + +/** + * Listener callback entry + */ +typedef struct { + /* FD to write to */ + int fd; + /* message type to send */ + int type; + /* back pointer to socket, only for subscriptions */ + private_lookip_socket_t *this; +} entry_t; + +/** + * Destroy entry + */ +static void entry_destroy(entry_t *this) +{ + close(this->fd); + free(this); +} + +/** + * Callback function for listener + */ +static bool listener_cb(entry_t *entry, bool up, host_t *vip, + host_t *other, identification_t *id, + char *name, u_int unique_id) +{ + lookip_response_t resp = { + .type = entry->type, + .unique_id = unique_id, + }; + + /* filter events */ + if (up && entry->type == LOOKIP_NOTIFY_DOWN) + { + return TRUE; + } + if (!up && entry->type == LOOKIP_NOTIFY_UP) + { + return TRUE; + } + + snprintf(resp.vip, sizeof(resp.vip), "%H", vip); + snprintf(resp.ip, sizeof(resp.ip), "%H", other); + snprintf(resp.id, sizeof(resp.id), "%Y", id); + snprintf(resp.name, sizeof(resp.name), "%s", name); + + switch (send(entry->fd, &resp, sizeof(resp), 0)) + { + case sizeof(resp): + return TRUE; + case 0: + /* client disconnected, adios */ + break; + default: + DBG1(DBG_CFG, "sending lookip response failed: %s", strerror(errno)); + break; + } + if (entry->this) + { /* unregister listener */ + entry->this->mutex->lock(entry->this->mutex); + entry->this->registered->remove(entry->this->registered, entry, NULL); + entry->this->mutex->unlock(entry->this->mutex); + + entry_destroy(entry); + } + return FALSE; +} + +/** + * Perform a entry lookup + */ +static void query(private_lookip_socket_t *this, int fd, lookip_request_t *req) +{ + entry_t entry = { + .fd = fd, + .type = LOOKIP_ENTRY, + }; + host_t *vip = NULL; + int matches = 0; + + if (req) + { /* lookup */ + req->vip[sizeof(req->vip) - 1] = 0; + vip = host_create_from_string(req->vip, 0); + if (vip) + { + matches = this->listener->lookup(this->listener, vip, + (void*)listener_cb, &entry); + vip->destroy(vip); + } + if (matches == 0) + { + lookip_response_t resp = { + .type = LOOKIP_NOT_FOUND, + }; + + snprintf(resp.vip, sizeof(resp.vip), "%s", req->vip); + if (send(fd, &resp, sizeof(resp), 0) < 0) + { + DBG1(DBG_CFG, "sending lookip not-found failed: %s", + strerror(errno)); + } + } + } + else + { /* dump */ + this->listener->lookup(this->listener, NULL, + (void*)listener_cb, &entry); + } +} + +/** + * Subscribe to virtual IP events + */ +static void subscribe(private_lookip_socket_t *this, int fd, int type) +{ + entry_t *entry; + + INIT(entry, + .fd = fd, + .type = type, + .this = this, + ); + + this->mutex->lock(this->mutex); + this->registered->insert_last(this->registered, entry); + this->mutex->unlock(this->mutex); + + this->listener->add_listener(this->listener, (void*)listener_cb, entry); +} + +/** + * Check if a client is subscribed for notifications + */ +static bool subscribed(private_lookip_socket_t *this, int fd) +{ + enumerator_t *enumerator; + bool subscribed = FALSE; + entry_t *entry; + + this->mutex->lock(this->mutex); + enumerator = this->registered->create_enumerator(this->registered); + while (enumerator->enumerate(enumerator, &entry)) + { + if (entry->fd == fd) + { + subscribed = TRUE; + break; + } + } + enumerator->destroy(enumerator); + this->mutex->unlock(this->mutex); + + return subscribed; +} + +/** + * Create a fd_set from all bound sockets + */ +static int build_fds(private_lookip_socket_t *this, fd_set *fds) +{ + enumerator_t *enumerator; + uintptr_t fd; + int maxfd; + + FD_ZERO(fds); + FD_SET(this->socket, fds); + maxfd = this->socket; + + this->mutex->lock(this->mutex); + enumerator = this->connected->create_enumerator(this->connected); + while (enumerator->enumerate(enumerator, &fd)) + { + FD_SET(fd, fds); + maxfd = max(maxfd, fd); + } + enumerator->destroy(enumerator); + this->mutex->unlock(this->mutex); + + return maxfd + 1; +} + +/** + * Find the socket select()ed + */ +static int scan_fds(private_lookip_socket_t *this, fd_set *fds) +{ + enumerator_t *enumerator; + uintptr_t fd; + int selected = -1; + + this->mutex->lock(this->mutex); + enumerator = this->connected->create_enumerator(this->connected); + while (enumerator->enumerate(enumerator, &fd)) + { + if (FD_ISSET(fd, fds)) + { + selected = fd; + break; + } + } + enumerator->destroy(enumerator); + this->mutex->unlock(this->mutex); + + return selected; +} + +/** + * Dispatch from a socket, return TRUE to end communication + */ +static bool dispatch(private_lookip_socket_t *this, int fd) +{ + lookip_request_t req; + int len; + + len = recv(fd, &req, sizeof(req), 0); + if (len != sizeof(req)) + { + if (len != 0) + { + DBG1(DBG_CFG, "receiving lookip request failed: %s", + strerror(errno)); + } + return TRUE; + } + switch (req.type) + { + case LOOKIP_LOOKUP: + query(this, fd, &req); + return FALSE; + case LOOKIP_DUMP: + query(this, fd, NULL); + return FALSE; + case LOOKIP_REGISTER_UP: + subscribe(this, fd, LOOKIP_NOTIFY_UP); + return FALSE; + case LOOKIP_REGISTER_DOWN: + subscribe(this, fd, LOOKIP_NOTIFY_DOWN); + return FALSE; + case LOOKIP_END: + return TRUE; + default: + DBG1(DBG_CFG, "received unknown lookip command"); + return TRUE; + } +} + +/** + * Accept client connections, dispatch + */ +static job_requeue_t receive(private_lookip_socket_t *this) +{ + struct sockaddr_un addr; + int fd, maxfd, len; + bool oldstate; + fd_set fds; + + while (TRUE) + { + maxfd = build_fds(this, &fds); + oldstate = thread_cancelability(TRUE); + if (select(maxfd, &fds, NULL, NULL, NULL) <= 0) + { + thread_cancelability(oldstate); + DBG1(DBG_CFG, "selecting lookip sockets failed: %s", + strerror(errno)); + break; + } + thread_cancelability(oldstate); + + if (FD_ISSET(this->socket, &fds)) + { /* new connection, accept() */ + len = sizeof(addr); + fd = accept(this->socket, (struct sockaddr*)&addr, &len); + if (fd != -1) + { + this->mutex->lock(this->mutex); + this->connected->insert_last(this->connected, + (void*)(uintptr_t)fd); + this->mutex->unlock(this->mutex); + } + else + { + DBG1(DBG_CFG, "accepting lookip connection failed: %s", + strerror(errno)); + } + continue; + } + + fd = scan_fds(this, &fds); + if (fd == -1) + { + continue; + } + if (dispatch(this, fd)) + { + this->mutex->lock(this->mutex); + this->connected->remove(this->connected, (void*)(uintptr_t)fd, NULL); + this->mutex->unlock(this->mutex); + if (!subscribed(this, fd)) + { + close(fd); + } + } + } + return JOB_REQUEUE_FAIR; +} + +METHOD(lookip_socket_t, destroy, void, + private_lookip_socket_t *this) +{ + this->registered->destroy_function(this->registered, (void*)entry_destroy); + this->connected->destroy(this->connected); + this->mutex->destroy(this->mutex); + close(this->socket); + free(this); +} + +/** + * See header + */ +lookip_socket_t *lookip_socket_create(lookip_listener_t *listener) +{ + private_lookip_socket_t *this; + + INIT(this, + .public = { + .destroy = _destroy, + }, + .listener = listener, + .registered = linked_list_create(), + .connected = linked_list_create(), + .mutex = mutex_create(MUTEX_TYPE_DEFAULT), + ); + + if (!open_socket(this)) + { + free(this); + return NULL; + } + + lib->processor->queue_job(lib->processor, + (job_t*)callback_job_create_with_prio((callback_job_cb_t)receive, this, + NULL, (callback_job_cancel_t)return_false, JOB_PRIO_CRITICAL)); + + return &this->public; +} diff --git a/src/libcharon/plugins/lookip/lookip_socket.h b/src/libcharon/plugins/lookip/lookip_socket.h new file mode 100644 index 000000000..c1c50246d --- /dev/null +++ b/src/libcharon/plugins/lookip/lookip_socket.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2012 Martin Willi + * Copyright (C) 2012 revosec AG + * + * 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. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup lookip_socket lookip_socket + * @{ @ingroup lookip + */ + +#ifndef LOOKIP_SOCKET_H_ +#define LOOKIP_SOCKET_H_ + +#include "lookip_listener.h" + +typedef struct lookip_socket_t lookip_socket_t; + +/** + * Lookip plugin UNIX query socket. + */ +struct lookip_socket_t { + + /** + * Destroy a lookip_socket_t. + */ + void (*destroy)(lookip_socket_t *this); +}; + +/** + * Create a lookip_socket instance. + */ +lookip_socket_t *lookip_socket_create(lookip_listener_t *listener); + +#endif /** LOOKIP_SOCKET_H_ @}*/ |