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/*
* asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2014, Digium, Inc.
*
* Mark Michelson <mmichelson@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*** MODULEINFO
<depend>pjproject</depend>
<depend>res_pjsip</depend>
<depend>res_pjsip_pubsub</depend>
<support_level>core</support_level>
***/
#include "asterisk.h"
#include <pjsip.h>
#include <pjsip_simple.h>
#include <pjlib.h>
#include "asterisk/module.h"
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_pubsub.h"
#include "asterisk/res_pjsip_presence_xml.h"
#include "asterisk/res_pjsip_body_generator_types.h"
static void *pidf_allocate_body(void *data)
{
struct ast_sip_exten_state_data *state_data = data;
char *local = ast_strdupa(state_data->local);
pjpidf_pres *pres;
pj_str_t entity;
pres = pjpidf_create(state_data->pool, pj_cstr(&entity, ast_strip_quoted(local, "<", ">")));
return pres;
}
static int pidf_generate_body_content(void *body, void *data)
{
pjpidf_tuple *tuple;
pj_str_t note, id, contact, priority;
char *statestring = NULL, *pidfstate = NULL, *pidfnote = NULL;
enum ast_sip_pidf_state local_state;
char sanitized[PJSIP_MAX_URL_SIZE];
pjpidf_pres *pres = body;
struct ast_sip_exten_state_data *state_data = data;
ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
&pidfstate, &pidfnote, &local_state, 0);
if (!pjpidf_pres_add_note(state_data->pool, pres, pj_cstr(¬e, pidfnote))) {
ast_log(LOG_WARNING, "Unable to add note to PIDF presence\n");
return -1;
}
if (!(tuple = pjpidf_pres_add_tuple(state_data->pool, pres,
pj_cstr(&id, state_data->exten)))) {
ast_log(LOG_WARNING, "Unable to create PIDF tuple\n");
return -1;
}
ast_sip_sanitize_xml(state_data->remote, sanitized, sizeof(sanitized));
pjpidf_tuple_set_contact(state_data->pool, tuple, pj_cstr(&contact, sanitized));
pjpidf_tuple_set_contact_prio(state_data->pool, tuple, pj_cstr(&priority, "1"));
pjpidf_status_set_basic_open(pjpidf_tuple_get_status(tuple),
local_state == NOTIFY_OPEN || local_state == NOTIFY_INUSE);
return 0;
}
#define MAX_STRING_GROWTHS 5
static void pidf_to_string(void *body, struct ast_str **str)
{
pjpidf_pres *pres = body;
int growths = 0;
int size;
do {
size = pjpidf_print(pres, ast_str_buffer(*str), ast_str_size(*str) - 1);
if (size <= AST_PJSIP_XML_PROLOG_LEN) {
ast_str_make_space(str, ast_str_size(*str) * 2);
++growths;
}
} while (size <= AST_PJSIP_XML_PROLOG_LEN && growths < MAX_STRING_GROWTHS);
if (size <= AST_PJSIP_XML_PROLOG_LEN) {
ast_log(LOG_WARNING, "PIDF body text too large\n");
return;
}
*(ast_str_buffer(*str) + size) = '\0';
ast_str_update(*str);
}
static struct ast_sip_pubsub_body_generator pidf_body_generator = {
.type = "application",
.subtype = "pidf+xml",
.body_type = AST_SIP_EXTEN_STATE_DATA,
.allocate_body = pidf_allocate_body,
.generate_body_content = pidf_generate_body_content,
.to_string = pidf_to_string,
/* No need for a destroy_body callback since we use a pool */
};
static int load_module(void)
{
if (ast_sip_pubsub_register_body_generator(&pidf_body_generator)) {
return AST_MODULE_LOAD_DECLINE;
}
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
ast_sip_pubsub_unregister_body_generator(&pidf_body_generator);
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP Extension State PIDF 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",
);
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