340 lines
12 KiB
C
340 lines
12 KiB
C
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/*
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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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|
};
|
||
|
|
|
||
|
|
static int load_module(void)
|
||
|
|
{
|
||
|
|
if (ast_sip_pubsub_register_body_generator(&dialog_info_body_generator)) {
|
||
|
|
return AST_MODULE_LOAD_DECLINE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return AST_MODULE_LOAD_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int unload_module(void)
|
||
|
|
{
|
||
|
|
ast_sip_pubsub_unregister_body_generator(&dialog_info_body_generator);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP Extension State Dialog Info+XML Provider",
|
||
|
|
.support_level = AST_MODULE_SUPPORT_CORE,
|
||
|
|
.load = load_module,
|
||
|
|
.unload = unload_module,
|
||
|
|
.load_pri = AST_MODPRI_CHANNEL_DEPEND,
|
||
|
|
.requires = "res_pjsip,res_pjsip_pubsub",
|
||
|
|
);
|