diff options
Diffstat (limited to 'src/libimcv/plugins/imc_scanner')
| -rw-r--r-- | src/libimcv/plugins/imc_scanner/Makefile.am | 15 | ||||
| -rw-r--r-- | src/libimcv/plugins/imc_scanner/Makefile.in | 600 | ||||
| -rw-r--r-- | src/libimcv/plugins/imc_scanner/imc_scanner.c | 384 | ||||
| -rw-r--r-- | src/libimcv/plugins/imc_scanner/imc_scanner_state.c | 115 | ||||
| -rw-r--r-- | src/libimcv/plugins/imc_scanner/imc_scanner_state.h | 47 |
5 files changed, 1161 insertions, 0 deletions
diff --git a/src/libimcv/plugins/imc_scanner/Makefile.am b/src/libimcv/plugins/imc_scanner/Makefile.am new file mode 100644 index 000000000..f27d73b67 --- /dev/null +++ b/src/libimcv/plugins/imc_scanner/Makefile.am @@ -0,0 +1,15 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libtncif \ + -I$(top_srcdir)/src/libimcv + +AM_CFLAGS = -rdynamic + +imcv_LTLIBRARIES = imc-scanner.la + +imc_scanner_la_LIBADD = $(top_builddir)/src/libimcv/libimcv.la \ + $(top_builddir)/src/libstrongswan/libstrongswan.la + +imc_scanner_la_SOURCES = imc_scanner.c imc_scanner_state.h imc_scanner_state.c + +imc_scanner_la_LDFLAGS = -module -avoid-version + diff --git a/src/libimcv/plugins/imc_scanner/Makefile.in b/src/libimcv/plugins/imc_scanner/Makefile.in new file mode 100644 index 000000000..497d317d5 --- /dev/null +++ b/src/libimcv/plugins/imc_scanner/Makefile.in @@ -0,0 +1,600 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 = $(program_transform_name) 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+install-man: + +install-pdf: install-pdf-am + +install-pdf-am: + +install-ps: install-ps-am + +install-ps-am: + +installcheck-am: + +maintainer-clean: maintainer-clean-am + -rm -rf ./$(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-imcvLTLIBRARIES + +.MAKE: install-am install-strip + +.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \ + clean-imcvLTLIBRARIES 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-dvi \ + install-dvi-am install-exec install-exec-am install-html \ + install-html-am install-imcvLTLIBRARIES install-info \ + install-info-am install-man install-pdf install-pdf-am \ + 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-imcvLTLIBRARIES + + +# 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/libimcv/plugins/imc_scanner/imc_scanner.c b/src/libimcv/plugins/imc_scanner/imc_scanner.c new file mode 100644 index 000000000..b24c39c3a --- /dev/null +++ b/src/libimcv/plugins/imc_scanner/imc_scanner.c @@ -0,0 +1,384 @@ +/* + * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil + * + * 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 "imc_scanner_state.h" + +#include <imc/imc_agent.h> +#include <pa_tnc/pa_tnc_msg.h> +#include <ietf/ietf_attr.h> +#include <ietf/ietf_attr_pa_tnc_error.h> +#include <ietf/ietf_attr_port_filter.h> + +#include <tncif_names.h> +#include <tncif_pa_subtypes.h> + +#include <pen/pen.h> +#include <utils/lexparser.h> +#include <debug.h> + +#include <stdio.h> + +/* IMC definitions */ + +static const char imc_name[] = "Scanner"; + +#define IMC_VENDOR_ID PEN_ITA +#define IMC_SUBTYPE PA_SUBTYPE_ITA_SCANNER + +static imc_agent_t *imc_scanner; + +/** + * see section 3.8.1 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_Initialize(TNC_IMCID imc_id, + TNC_Version min_version, + TNC_Version max_version, + TNC_Version *actual_version) +{ + if (imc_scanner) + { + DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name); + return TNC_RESULT_ALREADY_INITIALIZED; + } + imc_scanner = imc_agent_create(imc_name, IMC_VENDOR_ID, IMC_SUBTYPE, + imc_id, actual_version); + if (!imc_scanner) + { + return TNC_RESULT_FATAL; + } + if (min_version > TNC_IFIMC_VERSION_1 || max_version < TNC_IFIMC_VERSION_1) + { + DBG1(DBG_IMC, "no common IF-IMC version"); + return TNC_RESULT_NO_COMMON_VERSION; + } + return TNC_RESULT_SUCCESS; +} + +/** + * see section 3.8.2 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_NotifyConnectionChange(TNC_IMCID imc_id, + TNC_ConnectionID connection_id, + TNC_ConnectionState new_state) +{ + imc_state_t *state; + + if (!imc_scanner) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + switch (new_state) + { + case TNC_CONNECTION_STATE_CREATE: + state = imc_scanner_state_create(connection_id); + return imc_scanner->create_state(imc_scanner, state); + case TNC_CONNECTION_STATE_DELETE: + return imc_scanner->delete_state(imc_scanner, connection_id); + default: + return imc_scanner->change_state(imc_scanner, connection_id, + new_state, NULL); + } +} + +/** + * Determine all TCP and UDP server sockets listening on physical interfaces + */ +static bool do_netstat(ietf_attr_port_filter_t *attr) +{ + FILE *file; + char buf[BUF_LEN]; + chunk_t line, token; + int n = 0; + bool success = FALSE; + const char loopback_v4[] = "127.0.0.1"; + const char loopback_v6[] = "::1"; + + /* Open a pipe stream for reading the output of the netstat commmand */ + file = popen("/bin/netstat -n -l -p -4 -6 --inet", "r"); + if (!file) + { + DBG1(DBG_IMC, "Failed to run netstat command"); + return FALSE; + } + + /* Read the output a line at a time */ + while (fgets(buf, BUF_LEN-1, file)) + { + u_char *pos; + u_int8_t new_protocol, protocol; + u_int16_t new_port, port; + int i; + enumerator_t *enumerator; + bool allowed, found = FALSE; + + DBG2(DBG_IMC, "%.*s", strlen(buf)-1, buf); + + if (n++ < 2) + { + /* skip the first two header lines */ + continue; + } + line = chunk_create(buf, strlen(buf)); + + /* Extract the IP protocol type */ + if (!extract_token(&token, ' ', &line)) + { + DBG1(DBG_IMC, "Protocol field in netstat output not found"); + goto end; + } + if (match("tcp", &token) || match("tcp6", &token)) + { + new_protocol = IPPROTO_TCP; + } + else if (match("udp", &token) || match("udp6", &token)) + { + new_protocol = IPPROTO_UDP; + } + else + { + DBG1(DBG_IMC, "Skipped unknown IP protocol in netstat output"); + continue; + } + + /* Skip the Recv-Q and Send-Q fields */ + for (i = 0; i < 3; i++) + { + if (!eat_whitespace(&line) || !extract_token(&token, ' ', &line)) + { + token = chunk_empty; + break; + } + } + if (token.len == 0) + { + DBG1(DBG_IMC, "Local Address field in netstat output not found"); + goto end; + } + + /* Find the local port appended to the local address */ + pos = token.ptr + token.len; + while (*--pos != ':' && --token.len); + if (*pos != ':') + { + DBG1(DBG_IMC, "Local port field in netstat output not found"); + goto end; + } + token.len--; + + /* ignore ports of IPv4 and IPv6 loopback interfaces */ + if ((token.len == strlen(loopback_v4) && + memeq(loopback_v4, token.ptr, token.len)) || + (token.len == strlen(loopback_v6) && + memeq(loopback_v6, token.ptr, token.len))) + { + continue; + } + + /* convert the port string to an integer */ + new_port = atoi(pos+1); + + /* check if the there is already a port entry */ + enumerator = attr->create_port_enumerator(attr); + while (enumerator->enumerate(enumerator, &allowed, &protocol, &port)) + { + if (new_port == port && new_protocol == protocol) + { + found = TRUE; + } + } + enumerator->destroy(enumerator); + + /* Skip the duplicate port entry */ + if (found) + { + continue; + } + + /* Add new port entry */ + attr->add_port(attr, FALSE, new_protocol, new_port); + } + + /* Successfully completed the parsing of the netstat output */ + success = TRUE; + +end: + /* Close the pipe stream */ + pclose(file); + return success; +} + +static TNC_Result send_message(TNC_ConnectionID connection_id) +{ + pa_tnc_msg_t *msg; + pa_tnc_attr_t *attr; + ietf_attr_port_filter_t *attr_port_filter; + TNC_Result result; + + attr = ietf_attr_port_filter_create(); + attr->set_noskip_flag(attr, TRUE); + attr_port_filter = (ietf_attr_port_filter_t*)attr; + if (!do_netstat(attr_port_filter)) + { + attr->destroy(attr); + return TNC_RESULT_FATAL; + } + msg = pa_tnc_msg_create(); + msg->add_attribute(msg, attr); + msg->build(msg); + result = imc_scanner->send_message(imc_scanner, connection_id, FALSE, 0, + TNC_IMVID_ANY, msg->get_encoding(msg)); + msg->destroy(msg); + + return result; +} + +/** + * see section 3.8.3 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_BeginHandshake(TNC_IMCID imc_id, + TNC_ConnectionID connection_id) +{ + if (!imc_scanner) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + return send_message(connection_id); +} + +static TNC_Result receive_message(TNC_IMCID imc_id, + TNC_ConnectionID connection_id, + TNC_UInt32 msg_flags, + chunk_t msg, + TNC_VendorID msg_vid, + TNC_MessageSubtype msg_subtype, + TNC_UInt32 src_imv_id, + TNC_UInt32 dst_imc_id) +{ + pa_tnc_msg_t *pa_tnc_msg; + imc_state_t *state; + TNC_Result result; + bool fatal_error; + + if (!imc_scanner) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + + /* get current IMC state */ + if (!imc_scanner->get_state(imc_scanner, connection_id, &state)) + { + return TNC_RESULT_FATAL; + } + + /* parse received PA-TNC message and automatically handle any errors */ + result = imc_scanner->receive_message(imc_scanner, state, msg, msg_vid, + msg_subtype, src_imv_id, dst_imc_id, &pa_tnc_msg); + + /* no parsed PA-TNC attributes available if an error occurred */ + if (!pa_tnc_msg) + { + return result; + } + + /* preprocess any IETF standard error attributes */ + fatal_error = pa_tnc_msg->process_ietf_std_errors(pa_tnc_msg); + pa_tnc_msg->destroy(pa_tnc_msg); + + /* if no error occurred then always return the same response */ + return fatal_error ? TNC_RESULT_FATAL : send_message(connection_id); +} + +/** + * see section 3.8.4 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_ReceiveMessage(TNC_IMCID imc_id, + TNC_ConnectionID connection_id, + TNC_BufferReference msg, + TNC_UInt32 msg_len, + TNC_MessageType msg_type) +{ + TNC_VendorID msg_vid; + TNC_MessageSubtype msg_subtype; + + msg_vid = msg_type >> 8; + msg_subtype = msg_type & TNC_SUBTYPE_ANY; + + return receive_message(imc_id, connection_id, 0, chunk_create(msg, msg_len), + msg_vid, msg_subtype, 0, TNC_IMCID_ANY); +} + +/** + * see section 3.8.6 of TCG TNC IF-IMV Specification 1.3 + */ +TNC_Result TNC_IMC_ReceiveMessageLong(TNC_IMCID imc_id, + TNC_ConnectionID connection_id, + TNC_UInt32 msg_flags, + TNC_BufferReference msg, + TNC_UInt32 msg_len, + TNC_VendorID msg_vid, + TNC_MessageSubtype msg_subtype, + TNC_UInt32 src_imv_id, + TNC_UInt32 dst_imc_id) +{ + return receive_message(imc_id, connection_id, msg_flags, + chunk_create(msg, msg_len), msg_vid, msg_subtype, + src_imv_id, dst_imc_id); +} + +/** + * see section 3.8.7 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_BatchEnding(TNC_IMCID imc_id, + TNC_ConnectionID connection_id) +{ + if (!imc_scanner) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + return TNC_RESULT_SUCCESS; +} + +/** + * see section 3.8.8 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_Terminate(TNC_IMCID imc_id) +{ + if (!imc_scanner) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + imc_scanner->destroy(imc_scanner); + imc_scanner = NULL; + + return TNC_RESULT_SUCCESS; +} + +/** + * see section 4.2.8.1 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_ProvideBindFunction(TNC_IMCID imc_id, + TNC_TNCC_BindFunctionPointer bind_function) +{ + if (!imc_scanner) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + return imc_scanner->bind_functions(imc_scanner, bind_function); +} diff --git a/src/libimcv/plugins/imc_scanner/imc_scanner_state.c b/src/libimcv/plugins/imc_scanner/imc_scanner_state.c new file mode 100644 index 000000000..563105548 --- /dev/null +++ b/src/libimcv/plugins/imc_scanner/imc_scanner_state.c @@ -0,0 +1,115 @@ +/* + * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil + * + * 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 "imc_scanner_state.h" + +#include <debug.h> + +typedef struct private_imc_scanner_state_t private_imc_scanner_state_t; + +/** + * Private data of an imc_scanner_state_t object. + */ +struct private_imc_scanner_state_t { + + /** + * Public members of imc_scanner_state_t + */ + imc_scanner_state_t public; + + /** + * TNCCS connection ID + */ + TNC_ConnectionID connection_id; + + /** + * TNCCS connection state + */ + TNC_ConnectionState state; + + /** + * Does the TNCCS connection support long message types? + */ + bool has_long; + + /** + * Does the TNCCS connection support exclusive delivery? + */ + bool has_excl; + +}; + +METHOD(imc_state_t, get_connection_id, TNC_ConnectionID, + private_imc_scanner_state_t *this) +{ + return this->connection_id; +} + +METHOD(imc_state_t, has_long, bool, + private_imc_scanner_state_t *this) +{ + return this->has_long; +} + +METHOD(imc_state_t, has_excl, bool, + private_imc_scanner_state_t *this) +{ + return this->has_excl; +} + +METHOD(imc_state_t, set_flags, void, + private_imc_scanner_state_t *this, bool has_long, bool has_excl) +{ + this->has_long = has_long; + this->has_excl = has_excl; +} + +METHOD(imc_state_t, change_state, void, + private_imc_scanner_state_t *this, TNC_ConnectionState new_state) +{ + this->state = new_state; +} + +METHOD(imc_state_t, destroy, void, + private_imc_scanner_state_t *this) +{ + free(this); +} + +/** + * Described in header. + */ +imc_state_t *imc_scanner_state_create(TNC_ConnectionID connection_id) +{ + private_imc_scanner_state_t *this; + + INIT(this, + .public = { + .interface = { + .get_connection_id = _get_connection_id, + .has_long = _has_long, + .has_excl = _has_excl, + .set_flags = _set_flags, + .change_state = _change_state, + .destroy = _destroy, + }, + }, + .state = TNC_CONNECTION_STATE_CREATE, + .connection_id = connection_id, + ); + + return &this->public.interface; +} + + diff --git a/src/libimcv/plugins/imc_scanner/imc_scanner_state.h b/src/libimcv/plugins/imc_scanner/imc_scanner_state.h new file mode 100644 index 000000000..76aa4165b --- /dev/null +++ b/src/libimcv/plugins/imc_scanner/imc_scanner_state.h @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil + * + * 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 imc_scanner_state_t imc_scanner_state + * @{ @ingroup imc_scanner_state + */ + +#ifndef IMC_SCANNER_STATE_H_ +#define IMC_SCANNER_STATE_H_ + +#include <imc/imc_state.h> +#include <library.h> + +typedef struct imc_scanner_state_t imc_scanner_state_t; + +/** + * Internal state of an imc_scanner_t connection instance + */ +struct imc_scanner_state_t { + + /** + * imc_state_t interface + */ + imc_state_t interface; +}; + +/** + * Create an imc_scanner_state_t instance + * + * @param id connection ID + */ +imc_state_t* imc_scanner_state_create(TNC_ConnectionID id); + +#endif /** IMC_SCANNER_STATE_H_ @}*/ |