diff options
Diffstat (limited to 'src/libcharon/plugins/tnc_imc/tnc_imc.c')
| -rw-r--r-- | src/libcharon/plugins/tnc_imc/tnc_imc.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/src/libcharon/plugins/tnc_imc/tnc_imc.c b/src/libcharon/plugins/tnc_imc/tnc_imc.c new file mode 100644 index 000000000..174084436 --- /dev/null +++ b/src/libcharon/plugins/tnc_imc/tnc_imc.c @@ -0,0 +1,207 @@ +/* + * Copyright (C) 2006 Mike McCauley + * Copyright (C) 2010 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 "tnc_imc.h" + +#include <dlfcn.h> + +#include <debug.h> +#include <library.h> + +typedef struct private_tnc_imc_t private_tnc_imc_t; + +/** + * Private data of an imv_t object. + */ +struct private_tnc_imc_t { + + /** + * Public members of imc_t. + */ + imc_t public; + + /** + * Path of loaded IMC + */ + char *path; + + /** + * Name of loaded IMC + */ + char *name; + + /** + * Handle of loaded IMC + */ + void *handle; + + /** + * ID of loaded IMC + */ + TNC_IMCID id; + + /** + * List of message types supported by IMC + */ + TNC_MessageTypeList supported_types; + + /** + * Number of supported message types + */ + TNC_UInt32 type_count; +}; + +METHOD(imc_t, set_id, void, + private_tnc_imc_t *this, TNC_IMCID id) +{ + this->id = id; +} + +METHOD(imc_t, get_id, TNC_IMCID, + private_tnc_imc_t *this) +{ + return this->id; +} + +METHOD(imc_t, get_name, char*, + private_tnc_imc_t *this) +{ + return this->name; +} + +METHOD(imc_t, set_message_types, void, + private_tnc_imc_t *this, TNC_MessageTypeList supported_types, + TNC_UInt32 type_count) +{ + /* Free an existing MessageType list */ + free(this->supported_types); + this->supported_types = NULL; + + /* Store the new MessageType list */ + this->type_count = type_count; + if (type_count && supported_types) + { + size_t size = type_count * sizeof(TNC_MessageType); + + this->supported_types = malloc(size); + memcpy(this->supported_types, supported_types, size); + } + DBG2(DBG_TNC, "IMC %u supports %u message types", this->id, type_count); +} + +METHOD(imc_t, type_supported, bool, + private_tnc_imc_t *this, TNC_MessageType message_type) +{ + TNC_VendorID msg_vid, vid; + TNC_MessageSubtype msg_subtype, subtype; + int i; + + msg_vid = (message_type >> 8) & TNC_VENDORID_ANY; + msg_subtype = message_type & TNC_SUBTYPE_ANY; + + for (i = 0; i < this->type_count; i++) + { + vid = (this->supported_types[i] >> 8) & TNC_VENDORID_ANY; + subtype = this->supported_types[i] & TNC_SUBTYPE_ANY; + + if (this->supported_types[i] == message_type + || (subtype == TNC_SUBTYPE_ANY + && (msg_vid == vid || vid == TNC_VENDORID_ANY)) + || (vid == TNC_VENDORID_ANY + && (msg_subtype == subtype || subtype == TNC_SUBTYPE_ANY))) + { + return TRUE; + } + } + return FALSE; +} + +METHOD(imc_t, destroy, void, + private_tnc_imc_t *this) +{ + dlclose(this->handle); + free(this->supported_types); + free(this->name); + free(this->path); + free(this); +} + +/** + * Described in header. + */ +imc_t* tnc_imc_create(char *name, char *path) +{ + private_tnc_imc_t *this; + + INIT(this, + .public = { + .set_id = _set_id, + .get_id = _get_id, + .get_name = _get_name, + .set_message_types = _set_message_types, + .type_supported = _type_supported, + .destroy = _destroy, + }, + .name = name, + .path = path, + ); + + this->handle = dlopen(path, RTLD_LAZY); + if (!this->handle) + { + DBG1(DBG_TNC, "IMC \"%s\" failed to load: %s", name, dlerror()); + free(this); + return NULL; + } + + this->public.initialize = dlsym(this->handle, "TNC_IMC_Initialize"); + if (!this->public.initialize) + { + DBG1(DBG_TNC, "could not resolve TNC_IMC_Initialize in %s: %s\n", + path, dlerror()); + dlclose(this->handle); + free(this); + return NULL; + } + this->public.notify_connection_change = + dlsym(this->handle, "TNC_IMC_NotifyConnectionChange"); + this->public.begin_handshake = dlsym(this->handle, "TNC_IMC_BeginHandshake"); + if (!this->public.begin_handshake) + { + DBG1(DBG_TNC, "could not resolve TNC_IMC_BeginHandshake in %s: %s\n", + path, dlerror()); + dlclose(this->handle); + free(this); + return NULL; + } + this->public.receive_message = + dlsym(this->handle, "TNC_IMC_ReceiveMessage"); + this->public.batch_ending = + dlsym(this->handle, "TNC_IMC_BatchEnding"); + this->public.terminate = + dlsym(this->handle, "TNC_IMC_Terminate"); + this->public.provide_bind_function = + dlsym(this->handle, "TNC_IMC_ProvideBindFunction"); + if (!this->public.provide_bind_function) + { + DBG1(DBG_TNC, "could not resolve TNC_IMC_ProvideBindFunction in %s: %s\n", + path, dlerror()); + dlclose(this->handle); + free(this); + return NULL; + } + + return &this->public; +} |