138 lines
3.9 KiB
C
138 lines
3.9 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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* 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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<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/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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static void *pidf_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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char *local = ast_strdupa(state_data->local);
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pjpidf_pres *pres;
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pj_str_t entity;
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pres = pjpidf_create(state_data->pool, pj_cstr(&entity, ast_strip_quoted(local, "<", ">")));
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return pres;
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}
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static int pidf_generate_body_content(void *body, void *data)
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{
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pjpidf_tuple *tuple;
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pj_str_t note, id, contact, priority;
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char *statestring = NULL, *pidfstate = NULL, *pidfnote = NULL;
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enum ast_sip_pidf_state local_state;
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char sanitized[PJSIP_MAX_URL_SIZE];
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pjpidf_pres *pres = body;
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struct ast_sip_exten_state_data *state_data = data;
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ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
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&pidfstate, &pidfnote, &local_state, 0);
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if (!pjpidf_pres_add_note(state_data->pool, pres, pj_cstr(¬e, pidfnote))) {
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ast_log(LOG_WARNING, "Unable to add note to PIDF presence\n");
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return -1;
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}
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if (!(tuple = pjpidf_pres_add_tuple(state_data->pool, pres,
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pj_cstr(&id, state_data->exten)))) {
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ast_log(LOG_WARNING, "Unable to create PIDF tuple\n");
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return -1;
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}
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ast_sip_sanitize_xml(state_data->remote, sanitized, sizeof(sanitized));
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pjpidf_tuple_set_contact(state_data->pool, tuple, pj_cstr(&contact, sanitized));
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pjpidf_tuple_set_contact_prio(state_data->pool, tuple, pj_cstr(&priority, "1"));
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pjpidf_status_set_basic_open(pjpidf_tuple_get_status(tuple),
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local_state == NOTIFY_OPEN || local_state == NOTIFY_INUSE);
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return 0;
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}
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#define MAX_STRING_GROWTHS 5
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static void pidf_to_string(void *body, struct ast_str **str)
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{
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pjpidf_pres *pres = body;
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int growths = 0;
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int size;
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do {
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size = pjpidf_print(pres, ast_str_buffer(*str), ast_str_size(*str) - 1);
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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, "PIDF 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 pidf_body_generator = {
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.type = "application",
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.subtype = "pidf+xml",
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.body_type = AST_SIP_EXTEN_STATE_DATA,
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.allocate_body = pidf_allocate_body,
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.generate_body_content = pidf_generate_body_content,
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.to_string = pidf_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(&pidf_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(&pidf_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 PIDF 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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