This change allows TEL URI requests to come through for basic calls. The allowed requests are INVITE, ACK, BYE, and CANCEL. The From and To headers will now allow TEL URIs, as well as the request URI. Support is only for TEL URIs present in traffic from a remote party. Asterisk does not generate any TEL URIs on its own. ASTERISK-26894 Change-Id: If5729e6cd583be7acf666373bf9f1b9d653ec29a
228 lines
6.9 KiB
C
228 lines
6.9 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* Mark Michelson <mmichelson@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*** MODULEINFO
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<depend>pjproject</depend>
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<depend>res_pjsip</depend>
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include <pjsip.h>
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#include "asterisk/res_pjsip.h"
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#include "asterisk/module.h"
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static int get_from_header(pjsip_rx_data *rdata, char *username, size_t username_size, char *domain, size_t domain_size)
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{
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pjsip_uri *from = rdata->msg_info.from->uri;
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if (!ast_sip_is_uri_sip_sips(from)) {
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return -1;
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}
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ast_copy_pj_str(username, ast_sip_pjsip_uri_get_username(from), username_size);
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ast_copy_pj_str(domain, ast_sip_pjsip_uri_get_hostname(from), domain_size);
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return 0;
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}
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static pjsip_authorization_hdr *get_auth_header(pjsip_rx_data *rdata, char *username,
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size_t username_size, char *realm, size_t realm_size, pjsip_authorization_hdr *start)
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{
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pjsip_authorization_hdr *header;
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header = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_AUTHORIZATION, start);
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if (!header || pj_stricmp2(&header->scheme, "digest")) {
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return NULL;
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}
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ast_copy_pj_str(username, &header->credential.digest.username, username_size);
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ast_copy_pj_str(realm, &header->credential.digest.realm, realm_size);
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return header;
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}
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static int find_transport_state_in_use(void *obj, void *arg, int flags)
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{
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struct ast_sip_transport_state *transport_state = obj;
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pjsip_rx_data *rdata = arg;
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if (transport_state->transport == rdata->tp_info.transport
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|| (transport_state->factory
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&& !pj_strcmp(&transport_state->factory->addr_name.host, &rdata->tp_info.transport->local_name.host)
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&& transport_state->factory->addr_name.port == rdata->tp_info.transport->local_name.port)) {
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return CMP_MATCH;
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}
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return 0;
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}
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#define DOMAIN_NAME_LEN 255
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#define USERNAME_LEN 255
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static struct ast_sip_endpoint *find_endpoint(pjsip_rx_data *rdata, char *endpoint_name,
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char *domain_name)
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{
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struct ast_sip_endpoint *endpoint;
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if (!ast_sip_get_disable_multi_domain()) {
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struct ast_sip_domain_alias *alias;
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struct ao2_container *transport_states;
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struct ast_sip_transport_state *transport_state = NULL;
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struct ast_sip_transport *transport = NULL;
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char id[DOMAIN_NAME_LEN + USERNAME_LEN + sizeof("@")];
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/* Attempt to find the endpoint given the name and domain provided */
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snprintf(id, sizeof(id), "%s@%s", endpoint_name, domain_name);
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endpoint = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "endpoint", id);
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if (endpoint) {
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return endpoint;
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}
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/* See if an alias exists for the domain provided */
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alias = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "domain_alias",
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domain_name);
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if (alias) {
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snprintf(id, sizeof(id), "%s@%s", endpoint_name, alias->domain);
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ao2_ref(alias, -1);
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endpoint = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "endpoint", id);
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if (endpoint) {
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return endpoint;
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}
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}
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/* See if the transport this came in on has a provided domain */
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if ((transport_states = ast_sip_get_transport_states())
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&& (transport_state = ao2_callback(transport_states, 0, find_transport_state_in_use, rdata))
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&& (transport = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "transport", transport_state->id))
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&& !ast_strlen_zero(transport->domain)) {
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snprintf(id, sizeof(id), "%s@%s", endpoint_name, transport->domain);
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endpoint = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "endpoint", id);
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}
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ao2_cleanup(transport);
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ao2_cleanup(transport_state);
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ao2_cleanup(transport_states);
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if (endpoint) {
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return endpoint;
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}
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}
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/* Fall back to no domain */
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return ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "endpoint", endpoint_name);
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}
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static struct ast_sip_endpoint *username_identify(pjsip_rx_data *rdata)
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{
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char username[USERNAME_LEN + 1];
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char domain[DOMAIN_NAME_LEN + 1];
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struct ast_sip_endpoint *endpoint;
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if (get_from_header(rdata, username, sizeof(username), domain, sizeof(domain))) {
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return NULL;
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}
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/*
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* We may want to be matched without any user options getting
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* in the way.
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*/
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AST_SIP_USER_OPTIONS_TRUNCATE_CHECK(username);
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ast_debug(3, "Attempting identify by From username '%s' domain '%s'\n", username, domain);
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endpoint = find_endpoint(rdata, username, domain);
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if (!endpoint) {
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ast_debug(3, "Endpoint not found for From username '%s' domain '%s'\n", username, domain);
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return NULL;
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}
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if (!(endpoint->ident_method & AST_SIP_ENDPOINT_IDENTIFY_BY_USERNAME)) {
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ast_debug(3, "Endpoint found for '%s' but 'username' method not supported'\n", username);
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ao2_cleanup(endpoint);
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return NULL;
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}
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ast_debug(3, "Identified by From username '%s' domain '%s'\n", username, domain);
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return endpoint;
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}
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static struct ast_sip_endpoint *auth_username_identify(pjsip_rx_data *rdata)
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{
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char username[USERNAME_LEN + 1], realm[DOMAIN_NAME_LEN + 1];
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struct ast_sip_endpoint *endpoint;
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pjsip_authorization_hdr *auth_header = NULL;
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while ((auth_header = get_auth_header(rdata, username, sizeof(username), realm, sizeof(realm),
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auth_header ? auth_header->next : NULL))) {
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ast_debug(3, "Attempting identify by Authorization username '%s' realm '%s'\n", username,
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realm);
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endpoint = find_endpoint(rdata, username, realm);
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if (!endpoint) {
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ast_debug(3, "Endpoint not found for Authentication username '%s' realm '%s'\n",
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username, realm);
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ao2_cleanup(endpoint);
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continue;
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}
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if (!(endpoint->ident_method & AST_SIP_ENDPOINT_IDENTIFY_BY_AUTH_USERNAME)) {
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ast_debug(3, "Endpoint found for '%s' but 'auth_username' method not supported'\n",
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username);
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ao2_cleanup(endpoint);
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continue;
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}
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ast_debug(3, "Identified by Authorization username '%s' realm '%s'\n", username, realm);
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return endpoint;
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}
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return NULL;
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}
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static struct ast_sip_endpoint_identifier username_identifier = {
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.identify_endpoint = username_identify,
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};
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static struct ast_sip_endpoint_identifier auth_username_identifier = {
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.identify_endpoint = auth_username_identify,
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};
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static int load_module(void)
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{
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ast_sip_register_endpoint_identifier_with_name(&username_identifier, "username");
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ast_sip_register_endpoint_identifier_with_name(&auth_username_identifier, "auth_username");
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int unload_module(void)
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{
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ast_sip_unregister_endpoint_identifier(&auth_username_identifier);
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ast_sip_unregister_endpoint_identifier(&username_identifier);
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return 0;
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP username endpoint identifier",
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.support_level = AST_MODULE_SUPPORT_CORE,
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.load = load_module,
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.unload = unload_module,
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.load_pri = AST_MODPRI_CHANNEL_DEPEND - 4,
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.requires = "res_pjsip",
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);
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