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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2015, Digium, Inc.
*
* Joshua Colp <jcolp@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.
*/
/*! \file
*
* \brief Get information about a PJSIP contact
*
* \author \verbatim Joshua Colp <jcolp@digium.com> \endverbatim
*
* \ingroup functions
*
*/
/*** MODULEINFO
<support_level>core</support_level>
<depend>pjproject</depend>
<depend>res_pjsip</depend>
***/
#include "asterisk.h"
#include <pjsip.h>
#include <pjlib.h>
#include "asterisk/app.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/sorcery.h"
#include "asterisk/res_pjsip.h"
/*** DOCUMENTATION
<function name="PJSIP_CONTACT" language="en_US">
<synopsis>
Get information about a PJSIP contact
</synopsis>
<syntax>
<parameter name="name" required="true">
<para>The name of the contact to query.</para>
</parameter>
<parameter name="field" required="true">
<para>The configuration option for the contact to query for.
Supported options are those fields on the
<replaceable>contact</replaceable> object.</para>
<enumlist>
<configOptionToEnum>
<xi:include xpointer="xpointer(/docs/configInfo[@name='res_pjsip']/configFile[@name='pjsip.conf']/configObject[@name='contact']/configOption)"/>
</configOptionToEnum>
</enumlist>
</parameter>
</syntax>
</function>
***/
static int contact_function_get_permanent(void *obj, void *arg, int flags)
{
const char *id = arg;
if (!strcmp(ast_sorcery_object_get_id(obj), id)) {
return CMP_MATCH | CMP_STOP;
}
return 0;
}
static int pjsip_contact_function_read(struct ast_channel *chan,
const char *cmd, char *data, struct ast_str **buf, ssize_t len)
{
struct ast_sorcery *pjsip_sorcery;
char *parsed_data = ast_strdupa(data);
char *contact_name;
RAII_VAR(struct ast_sip_contact *, contact_obj, NULL, ao2_cleanup);
RAII_VAR(struct ast_sip_contact_status *, contact_status, NULL, ao2_cleanup);
int res = 0;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(contact_name);
AST_APP_ARG(field_name);
);
/* Check for zero arguments */
if (ast_strlen_zero(parsed_data)) {
ast_log(AST_LOG_ERROR, "Cannot call %s without arguments\n", cmd);
return -1;
}
AST_STANDARD_APP_ARGS(args, parsed_data);
if (ast_strlen_zero(args.contact_name)) {
ast_log(AST_LOG_ERROR, "Cannot call %s without a contact name to query\n", cmd);
return -1;
}
if (ast_strlen_zero(args.field_name)) {
ast_log(AST_LOG_ERROR, "Cannot call %s with an empty field name to query\n", cmd);
return -1;
}
pjsip_sorcery = ast_sip_get_sorcery();
if (!pjsip_sorcery) {
ast_log(AST_LOG_ERROR, "Unable to retrieve PJSIP configuration: sorcery object is NULL\n");
return -1;
}
/* Determine if this is a permanent contact or a normal contact */
if ((contact_name = strstr(args.contact_name, "@@"))) {
size_t aor_name_len = contact_name - args.contact_name;
char aor_name[aor_name_len + 1];
RAII_VAR(struct ast_sip_aor *, aor_obj, NULL, ao2_cleanup);
/* Grab only the AOR name so we can retrieve the AOR which will give us the contact */
strncpy(aor_name, args.contact_name, aor_name_len);
aor_name[aor_name_len] = '\0';
aor_obj = ast_sorcery_retrieve_by_id(pjsip_sorcery, "aor", aor_name);
if (!aor_obj) {
ast_log(AST_LOG_WARNING, "Failed to retrieve information for contact '%s'\n", args.contact_name);
return -1;
}
contact_obj = ao2_callback(aor_obj->permanent_contacts, 0, contact_function_get_permanent, args.contact_name);
} else {
contact_obj = ast_sorcery_retrieve_by_id(pjsip_sorcery, "contact", args.contact_name);
}
if (!contact_obj) {
ast_log(AST_LOG_WARNING, "Failed to retrieve information for contact '%s'\n", args.contact_name);
return -1;
}
contact_status = ast_sorcery_retrieve_by_id(pjsip_sorcery, CONTACT_STATUS, ast_sorcery_object_get_id(contact_obj));
if (!strcmp(args.field_name, "status")) {
ast_str_set(buf, len, "%s", ast_sip_get_contact_status_label(contact_status->status));
} else if (!strcmp(args.field_name, "rtt")) {
if (contact_status->status == UNKNOWN) {
ast_str_set(buf, len, "%s", "N/A");
} else {
ast_str_set(buf, len, "%" PRId64, contact_status->rtt);
}
} else {
struct ast_variable *change_set;
struct ast_variable *it_change_set;
change_set = ast_sorcery_objectset_create(pjsip_sorcery, contact_obj);
if (!change_set) {
ast_log(AST_LOG_WARNING, "Failed to retrieve information for contact '%s': change set is NULL\n", args.contact_name);
return -1;
}
for (it_change_set = change_set; it_change_set; it_change_set = it_change_set->next) {
if (!strcmp(it_change_set->name, args.field_name)) {
ast_str_set(buf, len, "%s", it_change_set->value);
break;
}
}
if (!it_change_set) {
ast_log(AST_LOG_WARNING, "Unknown property '%s' for PJSIP contact\n", args.field_name);
res = 1;
}
ast_variables_destroy(change_set);
}
return res;
}
static struct ast_custom_function pjsip_contact_function = {
.name = "PJSIP_CONTACT",
.read2 = pjsip_contact_function_read,
};
static int unload_module(void)
{
return ast_custom_function_unregister(&pjsip_contact_function);
}
static int load_module(void)
{
return ast_custom_function_register(&pjsip_contact_function);
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Get information about a PJSIP contact",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
.requires = "res_pjsip",
);
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