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
340 lines
12 KiB
C
340 lines
12 KiB
C
/*
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* asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2014, Digium, Inc.
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*
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* Joshua Colp <jcolp@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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<depend>res_pjsip_pubsub</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 <pjsip_simple.h>
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#include <pjlib.h>
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#include "asterisk/module.h"
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#include "asterisk/callerid.h"
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#include "asterisk/res_pjsip.h"
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#include "asterisk/res_pjsip_pubsub.h"
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#include "asterisk/res_pjsip_presence_xml.h"
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#include "asterisk/res_pjsip_body_generator_types.h"
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/*! \brief Structure which contains dialog-info+xml state information */
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struct dialog_info_xml_state {
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/*! \brief Version to place into the next NOTIFY */
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unsigned int version;
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};
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/*! \brief Destructor for dialog-info+xml information */
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static void dialog_info_xml_state_destroy(void *obj)
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{
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ast_free(obj);
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}
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/*! \brief Datastore for attaching dialog-info+xml state information */
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static const struct ast_datastore_info dialog_info_xml_datastore = {
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.type = "dialog-info+xml",
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.destroy = dialog_info_xml_state_destroy,
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};
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static void *dialog_info_allocate_body(void *data)
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{
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struct ast_sip_exten_state_data *state_data = data;
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return ast_sip_presence_xml_create_node(state_data->pool, NULL, "dialog-info");
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}
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/*!
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* \internal
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* \brief Find the channel that is causing the RINGING update, ref'd
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*/
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static struct ast_channel *find_ringing_channel(struct ao2_container *device_state_info)
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{
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struct ao2_iterator citer;
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struct ast_device_state_info *device_state;
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struct ast_channel *c = NULL;
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struct timeval tv = {0,};
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/* iterate ringing devices and get the oldest of all causing channels */
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citer = ao2_iterator_init(device_state_info, 0);
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for (; (device_state = ao2_iterator_next(&citer)); ao2_ref(device_state, -1)) {
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if (!device_state->causing_channel || (device_state->device_state != AST_DEVICE_RINGING &&
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device_state->device_state != AST_DEVICE_RINGINUSE)) {
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continue;
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}
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ast_channel_lock(device_state->causing_channel);
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if (ast_tvzero(tv) || ast_tvcmp(ast_channel_creationtime(device_state->causing_channel), tv) < 0) {
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c = device_state->causing_channel;
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tv = ast_channel_creationtime(c);
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}
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ast_channel_unlock(device_state->causing_channel);
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}
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ao2_iterator_destroy(&citer);
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return c ? ast_channel_ref(c) : NULL;
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}
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static int dialog_info_generate_body_content(void *body, void *data)
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{
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pj_xml_node *dialog_info = body, *dialog, *state;
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struct ast_datastore *datastore;
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struct dialog_info_xml_state *datastore_state;
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struct ast_sip_exten_state_data *state_data = data;
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char *local = ast_strdupa(state_data->local), *stripped, *statestring = NULL;
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char *remote = ast_strdupa(state_data->remote);
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char *pidfstate = NULL, *pidfnote = NULL;
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enum ast_sip_pidf_state local_state;
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char version_str[32], sanitized[PJSIP_MAX_URL_SIZE];
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struct ast_sip_endpoint *endpoint = NULL;
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unsigned int notify_early_inuse_ringing = 0;
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if (!local || !remote || !state_data->datastores) {
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return -1;
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}
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datastore = ast_datastores_find(state_data->datastores, "dialog-info+xml");
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if (!datastore) {
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const struct ast_json *version_json = NULL;
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datastore = ast_datastores_alloc_datastore(&dialog_info_xml_datastore, "dialog-info+xml");
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if (!datastore) {
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return -1;
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}
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datastore->data = ast_calloc(1, sizeof(struct dialog_info_xml_state));
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if (!datastore->data || ast_datastores_add(state_data->datastores, datastore)) {
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ao2_ref(datastore, -1);
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return -1;
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}
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datastore_state = datastore->data;
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if (state_data->sub) {
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version_json = ast_sip_subscription_get_persistence_data(state_data->sub);
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}
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if (version_json) {
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datastore_state->version = ast_json_integer_get(version_json);
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datastore_state->version++;
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} else {
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datastore_state->version = 0;
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}
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} else {
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datastore_state = datastore->data;
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datastore_state->version++;
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}
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stripped = ast_strip_quoted(local, "<", ">");
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ast_sip_sanitize_xml(stripped, sanitized, sizeof(sanitized));
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if (state_data->sub && (endpoint = ast_sip_subscription_get_endpoint(state_data->sub))) {
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notify_early_inuse_ringing = endpoint->notify_early_inuse_ringing;
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ao2_cleanup(endpoint);
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}
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ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
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&pidfstate, &pidfnote, &local_state, notify_early_inuse_ringing);
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ast_sip_presence_xml_create_attr(state_data->pool, dialog_info, "xmlns", "urn:ietf:params:xml:ns:dialog-info");
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snprintf(version_str, sizeof(version_str), "%u", datastore_state->version);
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ast_sip_presence_xml_create_attr(state_data->pool, dialog_info, "version", version_str);
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if (state_data->sub) {
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ast_sip_subscription_set_persistence_data(state_data->sub, ast_json_integer_create(datastore_state->version));
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}
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ast_sip_presence_xml_create_attr(state_data->pool, dialog_info, "state", "full");
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ast_sip_presence_xml_create_attr(state_data->pool, dialog_info, "entity", sanitized);
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dialog = ast_sip_presence_xml_create_node(state_data->pool, dialog_info, "dialog");
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ast_sip_presence_xml_create_attr(state_data->pool, dialog, "id", state_data->exten);
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if (!ast_strlen_zero(statestring) && !strcmp(statestring, "early")) {
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struct ast_channel *callee = NULL;
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char local_target[PJSIP_MAX_URL_SIZE + 32] = "";
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char *local_cid_name = NULL;
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pj_xml_node *local_node, *local_identity_node, *local_target_node;
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ast_sip_presence_xml_create_attr(state_data->pool, dialog, "direction", "recipient");
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if (state_data->device_state_info) {
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callee = find_ringing_channel(state_data->device_state_info);
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}
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if (callee) {
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static char *anonymous = "anonymous";
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static char *invalid = "anonymous.invalid";
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char *remote_cid_name;
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char *remote_connected_num;
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int remote_connected_num_restricted;
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char *local_caller_num;
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pjsip_dialog *dlg = ast_sip_subscription_get_dialog(state_data->sub);
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char remote_target[PJSIP_MAX_URL_SIZE + 32];
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char dlg_remote_uri[PJSIP_MAX_URL_SIZE];
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char *from_domain_stripped;
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char from_domain_sanitized[PJSIP_MAX_URL_SIZE];
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pj_xml_node *remote_node, *remote_identity_node, *remote_target_node;
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/* We use the local dialog URI to determine the domain to use in the XML itself */
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ast_copy_pj_str(dlg_remote_uri, ast_sip_pjsip_uri_get_hostname(dlg->local.info->uri), sizeof(dlg_remote_uri));
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from_domain_stripped = ast_strip_quoted(dlg_remote_uri, "<", ">");
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ast_sip_sanitize_xml(from_domain_stripped, from_domain_sanitized, sizeof(from_domain_sanitized));
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ast_channel_lock(callee);
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/* The remote node uses the connected line information, so who is calling the
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* monitored endpoint.
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*/
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remote_cid_name = S_COR(ast_channel_connected(callee)->id.name.valid,
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S_COR((ast_channel_connected(callee)->id.name.presentation &
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AST_PRES_RESTRICTION) == AST_PRES_RESTRICTED, anonymous,
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ast_channel_connected(callee)->id.name.str), "");
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remote_connected_num_restricted = (ast_channel_connected(callee)->id.number.presentation &
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AST_PRES_RESTRICTION) == AST_PRES_RESTRICTED;
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remote_connected_num = S_COR(ast_channel_connected(callee)->id.number.valid,
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S_COR(remote_connected_num_restricted, anonymous,
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ast_channel_connected(callee)->id.number.str), "invalid");
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snprintf(remote_target, sizeof(remote_target), "sip:%s@%s", remote_connected_num,
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remote_connected_num_restricted ? invalid : from_domain_sanitized);
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/* The local node uses the callerid information, so what the callerid would be
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* if the monitored endpoint was calling.
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*/
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local_cid_name = S_COR(ast_channel_caller(callee)->id.name.valid,
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ast_channel_caller(callee)->id.name.str, "");
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local_caller_num = S_COR(ast_channel_caller(callee)->id.number.valid,
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ast_channel_caller(callee)->id.number.str, "invalid");
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snprintf(local_target, sizeof(local_target), "sip:%s@%s", local_caller_num,
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from_domain_sanitized);
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ast_channel_unlock(callee);
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callee = ast_channel_unref(callee);
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remote_node = ast_sip_presence_xml_create_node(state_data->pool, dialog, "remote");
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remote_identity_node = ast_sip_presence_xml_create_node(state_data->pool, remote_node, "identity");
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remote_target_node = ast_sip_presence_xml_create_node(state_data->pool, remote_node, "target");
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pj_strdup2(state_data->pool, &remote_identity_node->content, remote_target);
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if (!ast_strlen_zero(remote_cid_name)) {
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char display_sanitized[PJSIP_MAX_URL_SIZE];
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ast_sip_sanitize_xml(remote_cid_name, display_sanitized, sizeof(display_sanitized));
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ast_sip_presence_xml_create_attr(state_data->pool, remote_identity_node, "display", display_sanitized);
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}
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ast_sip_presence_xml_create_attr(state_data->pool, remote_target_node, "uri", remote_target);
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}
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if (state_data->device_state_info) {
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local_node = ast_sip_presence_xml_create_node(state_data->pool, dialog, "local");
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local_identity_node = ast_sip_presence_xml_create_node(state_data->pool, local_node, "identity");
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local_target_node = ast_sip_presence_xml_create_node(state_data->pool, local_node, "target");
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/* If a channel is not available we fall back to the sanitized local URI instead */
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pj_strdup2(state_data->pool, &local_identity_node->content, S_OR(local_target, sanitized));
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if (!ast_strlen_zero(local_cid_name)) {
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char display_sanitized[PJSIP_MAX_URL_SIZE];
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ast_sip_sanitize_xml(local_cid_name, display_sanitized, sizeof(display_sanitized));
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ast_sip_presence_xml_create_attr(state_data->pool, local_identity_node, "display", display_sanitized);
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}
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ast_sip_presence_xml_create_attr(state_data->pool, local_target_node, "uri", sanitized);
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}
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}
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state = ast_sip_presence_xml_create_node(state_data->pool, dialog, "state");
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pj_strdup2(state_data->pool, &state->content, statestring);
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if (state_data->exten_state == AST_EXTENSION_ONHOLD) {
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pj_xml_node *local_node, *target, *param;
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local_node = ast_sip_presence_xml_create_node(state_data->pool, dialog, "local");
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target = ast_sip_presence_xml_create_node(state_data->pool, local_node, "target");
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ast_sip_presence_xml_create_attr(state_data->pool, target, "uri", sanitized);
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param = ast_sip_presence_xml_create_node(state_data->pool, target, "param");
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ast_sip_presence_xml_create_attr(state_data->pool, param, "pname", "+sip.rendering");
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ast_sip_presence_xml_create_attr(state_data->pool, param, "pvalue", "no");
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}
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ao2_ref(datastore, -1);
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return 0;
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}
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/* The maximum number of times the ast_str() for the body text can grow before we declare an XML body
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* too large to send.
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*/
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#define MAX_STRING_GROWTHS 6
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static void dialog_info_to_string(void *body, struct ast_str **str)
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{
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pj_xml_node *dialog_info = body;
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int growths = 0;
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int size;
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do {
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size = pj_xml_print(dialog_info, ast_str_buffer(*str), ast_str_size(*str) - 1, PJ_TRUE);
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if (size <= AST_PJSIP_XML_PROLOG_LEN) {
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ast_str_make_space(str, ast_str_size(*str) * 2);
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++growths;
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}
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} while (size <= AST_PJSIP_XML_PROLOG_LEN && growths < MAX_STRING_GROWTHS);
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if (size <= AST_PJSIP_XML_PROLOG_LEN) {
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ast_log(LOG_WARNING, "dialog-info+xml body text too large\n");
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return;
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}
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*(ast_str_buffer(*str) + size) = '\0';
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ast_str_update(*str);
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}
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static struct ast_sip_pubsub_body_generator dialog_info_body_generator = {
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.type = "application",
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.subtype = "dialog-info+xml",
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.body_type = AST_SIP_EXTEN_STATE_DATA,
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.allocate_body = dialog_info_allocate_body,
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.generate_body_content = dialog_info_generate_body_content,
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.to_string = dialog_info_to_string,
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/* No need for a destroy_body callback since we use a pool */
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};
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static int load_module(void)
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{
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if (ast_sip_pubsub_register_body_generator(&dialog_info_body_generator)) {
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return AST_MODULE_LOAD_DECLINE;
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}
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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_pubsub_unregister_body_generator(&dialog_info_body_generator);
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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 Extension State Dialog Info+XML Provider",
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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,
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.requires = "res_pjsip,res_pjsip_pubsub",
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);
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