diff options
Diffstat (limited to 'src/libhydra/plugins/resolve')
| -rw-r--r-- | src/libhydra/plugins/resolve/Makefile.am | 18 | ||||
| -rw-r--r-- | src/libhydra/plugins/resolve/Makefile.in | 591 | ||||
| -rw-r--r-- | src/libhydra/plugins/resolve/resolve_handler.c | 252 | ||||
| -rw-r--r-- | src/libhydra/plugins/resolve/resolve_handler.h | 49 | ||||
| -rw-r--r-- | src/libhydra/plugins/resolve/resolve_plugin.c | 62 | ||||
| -rw-r--r-- | src/libhydra/plugins/resolve/resolve_plugin.h | 42 |
6 files changed, 1014 insertions, 0 deletions
diff --git a/src/libhydra/plugins/resolve/Makefile.am b/src/libhydra/plugins/resolve/Makefile.am new file mode 100644 index 000000000..f8830d42e --- /dev/null +++ b/src/libhydra/plugins/resolve/Makefile.am @@ -0,0 +1,18 @@ + +INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \ + -I$(top_srcdir)/src/libcharon + +AM_CFLAGS = -rdynamic \ + -DRESOLV_CONF=\"${resolv_conf}\" + +if MONOLITHIC +noinst_LTLIBRARIES = libstrongswan-resolve.la +else +plugin_LTLIBRARIES = libstrongswan-resolve.la +endif + +libstrongswan_resolve_la_SOURCES = \ + resolve_plugin.h resolve_plugin.c \ + resolve_handler.h resolve_handler.c + +libstrongswan_resolve_la_LDFLAGS = -module -avoid-version diff --git a/src/libhydra/plugins/resolve/Makefile.in b/src/libhydra/plugins/resolve/Makefile.in new file mode 100644 index 000000000..e16c66923 --- /dev/null +++ b/src/libhydra/plugins/resolve/Makefile.in @@ -0,0 +1,591 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# 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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-pluginLTLIBRARIES + +.MAKE: install-am install-strip + +.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \ + clean-libtool clean-noinstLTLIBRARIES clean-pluginLTLIBRARIES \ + 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-info \ + install-info-am 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-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/libhydra/plugins/resolve/resolve_handler.c b/src/libhydra/plugins/resolve/resolve_handler.c new file mode 100644 index 000000000..cdc639038 --- /dev/null +++ b/src/libhydra/plugins/resolve/resolve_handler.c @@ -0,0 +1,252 @@ +/* + * Copyright (C) 2009 Martin Willi + * 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 "resolve_handler.h" + +#include <unistd.h> + +#include <hydra.h> +#include <debug.h> +#include <threading/mutex.h> + +typedef struct private_resolve_handler_t private_resolve_handler_t; + +/** + * Private data of an resolve_handler_t object. + */ +struct private_resolve_handler_t { + + /** + * Public resolve_handler_t interface. + */ + resolve_handler_t public; + + /** + * resolv.conf file to use + */ + char *file; + + /** + * Mutex to access file exclusively + */ + mutex_t *mutex; +}; + +/** + * Implementation of attribute_handler_t.handle + */ +static bool handle(private_resolve_handler_t *this, identification_t *server, + configuration_attribute_type_t type, chunk_t data) +{ + FILE *in, *out; + char buf[1024]; + host_t *addr; + size_t len; + bool handled = FALSE; + + switch (type) + { + case INTERNAL_IP4_DNS: + addr = host_create_from_chunk(AF_INET, data, 0); + break; + case INTERNAL_IP6_DNS: + addr = host_create_from_chunk(AF_INET6, data, 0); + break; + default: + return FALSE; + } + + if (!addr || addr->is_anyaddr(addr)) + { + DESTROY_IF(addr); + return FALSE; + } + this->mutex->lock(this->mutex); + + in = fopen(this->file, "r"); + /* allows us to stream from in to out */ + unlink(this->file); + out = fopen(this->file, "w"); + if (out) + { + fprintf(out, "nameserver %H # by strongSwan, from %Y\n", addr, server); + DBG1(DBG_IKE, "installing DNS server %H to %s", addr, this->file); + handled = TRUE; + + /* copy rest of the file */ + if (in) + { + while ((len = fread(buf, 1, sizeof(buf), in))) + { + ignore_result(fwrite(buf, 1, len, out)); + } + } + fclose(out); + } + if (in) + { + fclose(in); + } + this->mutex->unlock(this->mutex); + addr->destroy(addr); + + if (!handled) + { + DBG1(DBG_IKE, "adding DNS server failed", this->file); + } + return handled; +} + +/** + * Implementation of attribute_handler_t.release + */ +static void release(private_resolve_handler_t *this, identification_t *server, + configuration_attribute_type_t type, chunk_t data) +{ + FILE *in, *out; + char line[1024], matcher[512], *pos; + host_t *addr; + int family; + + switch (type) + { + case INTERNAL_IP4_DNS: + family = AF_INET; + break; + case INTERNAL_IP6_DNS: + family = AF_INET6; + break; + default: + return; + } + + this->mutex->lock(this->mutex); + + in = fopen(this->file, "r"); + if (in) + { + /* allows us to stream from in to out */ + unlink(this->file); + out = fopen(this->file, "w"); + if (out) + { + addr = host_create_from_chunk(family, data, 0); + snprintf(matcher, sizeof(matcher), + "nameserver %H # by strongSwan, from %Y\n", + addr, server); + + /* copy all, but matching line */ + while ((pos = fgets(line, sizeof(line), in))) + { + if (strneq(line, matcher, strlen(matcher))) + { + DBG1(DBG_IKE, "removing DNS server %H from %s", + addr, this->file); + } + else + { + fputs(line, out); + } + } + addr->destroy(addr); + fclose(out); + } + fclose(in); + } + + this->mutex->unlock(this->mutex); +} + +/** + * Attribute enumerator implementation + */ +typedef struct { + /** implements enumerator_t interface */ + enumerator_t public; + /** virtual IP we are requesting */ + host_t *vip; +} attribute_enumerator_t; + +/** + * Implementation of create_attribute_enumerator().enumerate() + */ +static bool attribute_enumerate(attribute_enumerator_t *this, + configuration_attribute_type_t *type, chunk_t *data) +{ + switch (this->vip->get_family(this->vip)) + { + case AF_INET: + *type = INTERNAL_IP4_DNS; + break; + case AF_INET6: + *type = INTERNAL_IP6_DNS; + break; + default: + return FALSE; + } + *data = chunk_empty; + /* enumerate only once */ + this->public.enumerate = (void*)return_false; + return TRUE; +} + +/** + * Implementation of attribute_handler_t.create_attribute_enumerator + */ +static enumerator_t* create_attribute_enumerator(private_resolve_handler_t *this, + identification_t *server, host_t *vip) +{ + if (vip) + { + attribute_enumerator_t *enumerator; + + enumerator = malloc_thing(attribute_enumerator_t); + enumerator->public.enumerate = (void*)attribute_enumerate; + enumerator->public.destroy = (void*)free; + enumerator->vip = vip; + + return &enumerator->public; + } + return enumerator_create_empty(); +} + +/** + * Implementation of resolve_handler_t.destroy. + */ +static void destroy(private_resolve_handler_t *this) +{ + this->mutex->destroy(this->mutex); + free(this); +} + +/** + * See header + */ +resolve_handler_t *resolve_handler_create() +{ + private_resolve_handler_t *this = malloc_thing(private_resolve_handler_t); + + this->public.handler.handle = (bool(*)(attribute_handler_t*, identification_t*, configuration_attribute_type_t, chunk_t))handle; + this->public.handler.release = (void(*)(attribute_handler_t*, identification_t*, configuration_attribute_type_t, chunk_t))release; + this->public.handler.create_attribute_enumerator = (enumerator_t*(*)(attribute_handler_t*, identification_t *server, host_t *vip))create_attribute_enumerator; + this->public.destroy = (void(*)(resolve_handler_t*))destroy; + + this->mutex = mutex_create(MUTEX_TYPE_DEFAULT); + this->file = lib->settings->get_str(lib->settings, + "%s.plugins.resolve.file", RESOLV_CONF, hydra->daemon); + + return &this->public; +} + diff --git a/src/libhydra/plugins/resolve/resolve_handler.h b/src/libhydra/plugins/resolve/resolve_handler.h new file mode 100644 index 000000000..77bf9781c --- /dev/null +++ b/src/libhydra/plugins/resolve/resolve_handler.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2009 Martin Willi + * 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 resolve_handler resolve_handler + * @{ @ingroup resolve + */ + +#ifndef RESOLVE_HANDLER_H_ +#define RESOLVE_HANDLER_H_ + +#include <attributes/attribute_handler.h> + +typedef struct resolve_handler_t resolve_handler_t; + +/** + * Handle DNS configuration attributes by mangling a resolv.conf file. + */ +struct resolve_handler_t { + + /** + * Implements the attribute_handler_t interface + */ + attribute_handler_t handler; + + /** + * Destroy a resolve_handler_t. + */ + void (*destroy)(resolve_handler_t *this); +}; + +/** + * Create a resolve_handler instance. + */ +resolve_handler_t *resolve_handler_create(); + +#endif /** RESOLVE_HANDLER_H_ @}*/ diff --git a/src/libhydra/plugins/resolve/resolve_plugin.c b/src/libhydra/plugins/resolve/resolve_plugin.c new file mode 100644 index 000000000..502129593 --- /dev/null +++ b/src/libhydra/plugins/resolve/resolve_plugin.c @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2009 Martin Willi + * 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 "resolve_plugin.h" +#include "resolve_handler.h" + +#include <hydra.h> + +typedef struct private_resolve_plugin_t private_resolve_plugin_t; + +/** + * private data of resolve plugin + */ +struct private_resolve_plugin_t { + + /** + * implements plugin interface + */ + resolve_plugin_t public; + + /** + * The registerd DNS attribute handler + */ + resolve_handler_t *handler; +}; + +/** + * Implementation of plugin_t.destroy + */ +static void destroy(private_resolve_plugin_t *this) +{ + hydra->attributes->remove_handler(hydra->attributes, &this->handler->handler); + this->handler->destroy(this->handler); + free(this); +} + +/* + * see header file + */ +plugin_t *resolve_plugin_create() +{ + private_resolve_plugin_t *this = malloc_thing(private_resolve_plugin_t); + + this->public.plugin.destroy = (void(*)(plugin_t*))destroy; + this->handler = resolve_handler_create(); + hydra->attributes->add_handler(hydra->attributes, &this->handler->handler); + + return &this->public.plugin; +} + diff --git a/src/libhydra/plugins/resolve/resolve_plugin.h b/src/libhydra/plugins/resolve/resolve_plugin.h new file mode 100644 index 000000000..0148b10d7 --- /dev/null +++ b/src/libhydra/plugins/resolve/resolve_plugin.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2009 Martin Willi + * 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 resolve resolve + * @ingroup cplugins + * + * @defgroup resolve_plugin resolve_plugin + * @{ @ingroup resolve + */ + +#ifndef RESOLVE_PLUGIN_H_ +#define RESOLVE_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct resolve_plugin_t resolve_plugin_t; + +/** + * Plugin that writes received DNS servers in a resolv.conf file. + */ +struct resolve_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +#endif /** RESOLVE_PLUGIN_H_ @}*/ |