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347 lines
12 KiB
347 lines
12 KiB
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, 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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#include "asterisk.h"
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#include "pjsip.h"
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#include "pjlib.h"
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#include "asterisk/res_pjsip.h"
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#include "asterisk/logger.h"
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#include "asterisk/astobj2.h"
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#include "asterisk/sorcery.h"
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#include "include/res_pjsip_private.h"
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#define CONTACT_TRANSPORTS_BUCKETS 7
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static struct ao2_container *contact_transports;
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/*! \brief Destructor for AOR */
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static void aor_destroy(void *obj)
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{
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struct ast_sip_aor *aor = obj;
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ao2_cleanup(aor->permanent_contacts);
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ast_string_field_free_memory(aor);
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}
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/*! \brief Allocator for AOR */
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static void *aor_alloc(const char *name)
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{
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struct ast_sip_aor *aor = ast_sorcery_generic_alloc(sizeof(struct ast_sip_aor), aor_destroy);
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if (!aor) {
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return NULL;
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}
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ast_string_field_init(aor, 128);
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return aor;
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}
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/*! \brief Destructor for contact */
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static void contact_destroy(void *obj)
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{
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struct ast_sip_contact *contact = obj;
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ast_string_field_free_memory(contact);
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}
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/*! \brief Allocator for contact */
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static void *contact_alloc(const char *name)
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{
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struct ast_sip_contact *contact = ast_sorcery_generic_alloc(sizeof(*contact), contact_destroy);
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if (!contact) {
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return NULL;
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}
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if (ast_string_field_init(contact, 256)) {
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ao2_cleanup(contact);
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return NULL;
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}
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return contact;
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}
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/*! \brief Callback function for finding a contact_transport by URI */
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static int contact_transport_find_by_uri(void *obj, void *arg, int flags)
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{
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struct ast_sip_contact_transport *ct = obj;
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const char *contact_uri = arg;
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return (!strcmp(ct->uri, contact_uri)) ? CMP_MATCH | CMP_STOP : 0;
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}
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/*! \brief Callback function for finding a contact_transport by transport */
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static int contact_transport_find_by_transport(void *obj, void *arg, int flags)
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{
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struct ast_sip_contact_transport *ct = obj;
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pjsip_transport *transport = arg;
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return (ct->transport == transport) ? CMP_MATCH | CMP_STOP : 0;
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}
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void ast_sip_location_add_contact_transport(struct ast_sip_contact_transport *ct)
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{
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ao2_link(contact_transports, ct);
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return;
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}
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void ast_sip_location_delete_contact_transport(struct ast_sip_contact_transport *ct)
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{
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ao2_unlink(contact_transports, ct);
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return;
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}
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struct ast_sip_contact_transport *ast_sip_location_retrieve_contact_transport_by_uri(const char *contact_uri)
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{
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return ao2_callback(contact_transports, 0, contact_transport_find_by_uri, (void *)contact_uri);
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}
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struct ast_sip_contact_transport *ast_sip_location_retrieve_contact_transport_by_transport(pjsip_transport *transport)
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{
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return ao2_callback(contact_transports, 0, contact_transport_find_by_transport, transport);
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}
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struct ast_sip_aor *ast_sip_location_retrieve_aor(const char *aor_name)
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{
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return ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "aor", aor_name);
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}
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/*! \brief Internal callback function which deletes and unlinks any expired contacts */
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static int contact_expire(void *obj, void *arg, int flags)
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{
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struct ast_sip_contact *contact = obj;
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/* If the contact has not yet expired it is valid */
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if (ast_tvdiff_ms(contact->expiration_time, ast_tvnow()) > 0) {
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return 0;
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}
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ast_sip_location_delete_contact(contact);
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return CMP_MATCH;
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}
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/*! \brief Internal callback function which links static contacts into another container */
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static int contact_link_static(void *obj, void *arg, int flags)
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{
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struct ao2_container *dest = arg;
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ao2_link_flags(dest, obj, OBJ_NOLOCK);
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return 0;
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}
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/*! \brief Simple callback function which returns immediately, used to grab the first contact of an AOR */
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static int contact_find_first(void *obj, void *arg, int flags)
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{
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return CMP_MATCH | CMP_STOP;
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}
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struct ast_sip_contact *ast_sip_location_retrieve_first_aor_contact(const struct ast_sip_aor *aor)
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{
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RAII_VAR(struct ao2_container *, contacts, NULL, ao2_cleanup);
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struct ast_sip_contact *contact;
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contacts = ast_sip_location_retrieve_aor_contacts(aor);
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if (!contacts || (ao2_container_count(contacts) == 0)) {
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return NULL;
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}
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contact = ao2_callback(contacts, OBJ_NOLOCK, contact_find_first, NULL);
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return contact;
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}
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struct ao2_container *ast_sip_location_retrieve_aor_contacts(const struct ast_sip_aor *aor)
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{
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/* Give enough space for ^ at the beginning and ;@ at the end, since that is our object naming scheme */
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char regex[strlen(ast_sorcery_object_get_id(aor)) + 4];
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struct ao2_container *contacts;
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snprintf(regex, sizeof(regex), "^%s;@", ast_sorcery_object_get_id(aor));
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if (!(contacts = ast_sorcery_retrieve_by_regex(ast_sip_get_sorcery(), "contact", regex))) {
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return NULL;
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}
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/* Prune any expired contacts and delete them, we do this first because static contacts can never expire */
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ao2_callback(contacts, OBJ_NOLOCK | OBJ_NODATA | OBJ_MULTIPLE | OBJ_UNLINK, contact_expire, NULL);
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/* Add any permanent contacts from the AOR */
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if (aor->permanent_contacts) {
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ao2_callback(aor->permanent_contacts, OBJ_NOLOCK | OBJ_NODATA, contact_link_static, contacts);
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}
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return contacts;
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}
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struct ast_sip_contact *ast_sip_location_retrieve_contact_from_aor_list(const char *aor_list)
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{
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char *aor_name;
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char *rest;
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struct ast_sip_contact *contact = NULL;
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/* If the location is still empty we have nowhere to go */
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if (ast_strlen_zero(aor_list) || !(rest = ast_strdupa(aor_list))) {
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ast_log(LOG_WARNING, "Unable to determine contacts from empty aor list\n");
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return NULL;
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}
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while ((aor_name = strsep(&rest, ","))) {
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RAII_VAR(struct ast_sip_aor *, aor, ast_sip_location_retrieve_aor(aor_name), ao2_cleanup);
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RAII_VAR(struct ao2_container *, contacts, NULL, ao2_cleanup);
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if (!aor) {
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continue;
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}
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contact = ast_sip_location_retrieve_first_aor_contact(aor);
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/* If a valid contact is available use its URI for dialing */
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if (contact) {
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break;
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}
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}
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return contact;
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}
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struct ast_sip_contact *ast_sip_location_retrieve_contact(const char *contact_name)
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{
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return ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "contact", contact_name);
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}
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int ast_sip_location_add_contact(struct ast_sip_aor *aor, const char *uri, struct timeval expiration_time)
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{
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char name[AST_UUID_STR_LEN];
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RAII_VAR(struct ast_sip_contact *, contact, NULL, ao2_cleanup);
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snprintf(name, sizeof(name), "%s;@%s", ast_sorcery_object_get_id(aor), uri);
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if (!(contact = ast_sorcery_alloc(ast_sip_get_sorcery(), "contact", name))) {
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return -1;
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}
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ast_string_field_set(contact, uri, uri);
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contact->expiration_time = expiration_time;
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contact->qualify_frequency = aor->qualify_frequency;
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contact->authenticate_qualify = aor->authenticate_qualify;
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return ast_sorcery_create(ast_sip_get_sorcery(), contact);
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}
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int ast_sip_location_update_contact(struct ast_sip_contact *contact)
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{
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return ast_sorcery_update(ast_sip_get_sorcery(), contact);
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}
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int ast_sip_location_delete_contact(struct ast_sip_contact *contact)
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{
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return ast_sorcery_delete(ast_sip_get_sorcery(), contact);
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}
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/*! \brief Custom handler for translating from a string timeval to actual structure */
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static int expiration_str2struct(const struct aco_option *opt, struct ast_variable *var, void *obj)
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{
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struct ast_sip_contact *contact = obj;
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return ast_get_timeval(var->value, &contact->expiration_time, ast_tv(0, 0), NULL);
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}
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/*! \brief Custom handler for translating from an actual structure timeval to string */
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static int expiration_struct2str(const void *obj, const intptr_t *args, char **buf)
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{
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const struct ast_sip_contact *contact = obj;
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return (ast_asprintf(buf, "%lu", contact->expiration_time.tv_sec) < 0) ? -1 : 0;
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}
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/*! \brief Custom handler for permanent URIs */
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static int permanent_uri_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
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{
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struct ast_sip_aor *aor = obj;
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RAII_VAR(struct ast_sip_contact *, contact, NULL, ao2_cleanup);
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pj_pool_t *pool;
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pj_str_t contact_uri;
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static const pj_str_t HCONTACT = { "Contact", 7 };
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pool = pjsip_endpt_create_pool(ast_sip_get_pjsip_endpoint(), "Permanent Contact Validation", 256, 256);
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if (!pool) {
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return -1;
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}
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pj_strdup2_with_null(pool, &contact_uri, var->value);
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if (!pjsip_parse_hdr(pool, &HCONTACT, contact_uri.ptr, contact_uri.slen, NULL)) {
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ast_log(LOG_ERROR, "Permanent URI on aor '%s' with contact '%s' failed to parse\n",
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ast_sorcery_object_get_id(aor), var->value);
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pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), pool);
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return -1;
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}
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pjsip_endpt_release_pool(ast_sip_get_pjsip_endpoint(), pool);
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if ((!aor->permanent_contacts && !(aor->permanent_contacts = ao2_container_alloc_options(AO2_ALLOC_OPT_LOCK_NOLOCK, 1, NULL, NULL))) ||
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!(contact = ast_sorcery_alloc(ast_sip_get_sorcery(), "contact", NULL))) {
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return -1;
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}
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ast_string_field_set(contact, uri, var->value);
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ao2_link_flags(aor->permanent_contacts, contact, OBJ_NOLOCK);
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return 0;
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}
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/*! \brief Initialize sorcery with location support */
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int ast_sip_initialize_sorcery_location(struct ast_sorcery *sorcery)
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{
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ast_sorcery_apply_default(sorcery, "contact", "astdb", "registrar");
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ast_sorcery_apply_default(sorcery, "aor", "config", "pjsip.conf,criteria=type=aor");
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if (ast_sorcery_object_register(sorcery, "contact", contact_alloc, NULL, NULL) ||
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ast_sorcery_object_register(sorcery, "aor", aor_alloc, NULL, NULL)) {
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return -1;
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}
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ast_sorcery_object_field_register(sorcery, "contact", "type", "", OPT_NOOP_T, 0, 0);
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ast_sorcery_object_field_register(sorcery, "contact", "uri", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_contact, uri));
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ast_sorcery_object_field_register_custom(sorcery, "contact", "expiration_time", "", expiration_str2struct, expiration_struct2str, 0, 0);
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ast_sorcery_object_field_register(sorcery, "contact", "qualify_frequency", 0, OPT_UINT_T,
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PARSE_IN_RANGE, FLDSET(struct ast_sip_contact, qualify_frequency), 0, 86400);
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ast_sorcery_object_field_register(sorcery, "aor", "type", "", OPT_NOOP_T, 0, 0);
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ast_sorcery_object_field_register(sorcery, "aor", "minimum_expiration", "60", OPT_UINT_T, 0, FLDSET(struct ast_sip_aor, minimum_expiration));
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ast_sorcery_object_field_register(sorcery, "aor", "maximum_expiration", "7200", OPT_UINT_T, 0, FLDSET(struct ast_sip_aor, maximum_expiration));
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ast_sorcery_object_field_register(sorcery, "aor", "default_expiration", "3600", OPT_UINT_T, 0, FLDSET(struct ast_sip_aor, default_expiration));
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ast_sorcery_object_field_register(sorcery, "aor", "qualify_frequency", 0, OPT_UINT_T, PARSE_IN_RANGE, FLDSET(struct ast_sip_aor, qualify_frequency), 0, 86400);
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ast_sorcery_object_field_register(sorcery, "aor", "authenticate_qualify", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_aor, authenticate_qualify));
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ast_sorcery_object_field_register(sorcery, "aor", "max_contacts", "0", OPT_UINT_T, 0, FLDSET(struct ast_sip_aor, max_contacts));
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ast_sorcery_object_field_register(sorcery, "aor", "remove_existing", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_aor, remove_existing));
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ast_sorcery_object_field_register_custom(sorcery, "aor", "contact", "", permanent_uri_handler, NULL, 0, 0);
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ast_sorcery_object_field_register(sorcery, "aor", "mailboxes", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_sip_aor, mailboxes));
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return 0;
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}
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int ast_res_pjsip_init_contact_transports(void)
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{
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if (contact_transports) {
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ao2_t_ref(contact_transports, -1, "Remove old contact transports");
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}
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contact_transports = ao2_t_container_alloc_options(AO2_ALLOC_OPT_LOCK_RWLOCK, CONTACT_TRANSPORTS_BUCKETS, NULL, NULL, "Create container for contact transports");
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if (!contact_transports) {
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return -1;
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}
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return 0;
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}
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