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mod_sofia.c
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mod_sofia.c
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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2021, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <anthm@freeswitch.org>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Anthony Minessale II <anthm@freeswitch.org>
* Ken Rice <krice at freeswitch.org>
* Paul D. Tinsley <pdt at jackhammer.org>
* Bret McDanel <trixter AT 0xdecafbad.com>
* Raymond Chandler <intralanman@freeswitch.org>
* Emmanuel Schmidbauer <eschmidbauer@gmail.com>
* Kathleen King <kathleen.king@quentustech.com>
*
*
* mod_sofia.c -- SOFIA SIP Endpoint
*
*/
/* Best viewed in a 160 x 60 VT100 Terminal or so the line below at least fits across your screen*/
/*************************************************************************************************************************************************************/
#include "mod_sofia.h"
#include "sofia-sip/sip_extra.h"
#if HAVE_STIRSHAKEN
#include <stir_shaken.h>
#endif
SWITCH_MODULE_LOAD_FUNCTION(mod_sofia_load);
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_sofia_shutdown);
SWITCH_MODULE_DEFINITION(mod_sofia, mod_sofia_load, mod_sofia_shutdown, NULL);
struct mod_sofia_globals mod_sofia_globals;
switch_endpoint_interface_t *sofia_endpoint_interface;
#define STRLEN 15
void mod_sofia_shutdown_cleanup();
static switch_status_t sofia_on_init(switch_core_session_t *session);
static switch_status_t sofia_on_exchange_media(switch_core_session_t *session);
static switch_status_t sofia_on_soft_execute(switch_core_session_t *session);
static switch_status_t sofia_acknowledge_call(switch_core_session_t *session);
static switch_call_cause_t sofia_outgoing_channel(switch_core_session_t *session, switch_event_t *var_event,
switch_caller_profile_t *outbound_profile, switch_core_session_t **new_session,
switch_memory_pool_t **pool, switch_originate_flag_t flags, switch_call_cause_t *cancel_cause);
static switch_status_t sofia_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id);
static switch_status_t sofia_write_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id);
static switch_status_t sofia_read_video_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id);
static switch_status_t sofia_write_video_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id);
static switch_status_t sofia_read_text_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id);
static switch_status_t sofia_write_text_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id);
static switch_status_t sofia_kill_channel(switch_core_session_t *session, int sig);
/* BODY OF THE MODULE */
/*************************************************************************************************************************************************************/
/*
State methods they get called when the state changes to the specific state
returning SWITCH_STATUS_SUCCESS tells the core to execute the standard state method next
so if you fully implement the state you can return SWITCH_STATUS_FALSE to skip it.
*/
static switch_status_t sofia_on_init(switch_core_session_t *session)
{
const char *hval = NULL;
switch_channel_t *channel = switch_core_session_get_channel(session);
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
switch_status_t status = SWITCH_STATUS_SUCCESS;
switch_assert(tech_pvt != NULL);
switch_mutex_lock(tech_pvt->sofia_mutex);
switch_core_media_check_dtmf_type(session);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s SOFIA INIT\n", switch_channel_get_name(channel));
if (switch_channel_test_flag(channel, CF_PROXY_MODE) || switch_channel_test_flag(channel, CF_PROXY_MEDIA)) {
switch_core_media_absorb_sdp(session);
}
if ((hval = switch_channel_get_variable(channel, "sip_watch_headers"))) {
char *dupvar = NULL;
char *watch_headers[10];
unsigned int numhdrs = 0;
unsigned int i = 0;
dupvar = switch_core_session_strdup(session, hval);
numhdrs = switch_separate_string(dupvar, ',', watch_headers, switch_arraylen(watch_headers));
if (numhdrs) {
char **wheaders = switch_core_session_alloc(session, ((numhdrs+1) * sizeof(wheaders[0])));
for (i = 0; i < numhdrs; i++) {
wheaders[i] = watch_headers[i];
}
wheaders[i] = NULL;
tech_pvt->watch_headers = wheaders;
}
}
if (switch_channel_test_flag(tech_pvt->channel, CF_RECOVERING) || switch_channel_test_flag(tech_pvt->channel, CF_RECOVERING_BRIDGE)) {
sofia_set_flag(tech_pvt, TFLAG_RECOVERED);
}
if (sofia_test_flag(tech_pvt, TFLAG_OUTBOUND) || switch_channel_test_flag(tech_pvt->channel, CF_RECOVERING)) {
if (sofia_glue_do_invite(session) != SWITCH_STATUS_SUCCESS) {
switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
assert(switch_channel_get_state(channel) != CS_INIT);
status = SWITCH_STATUS_FALSE;
goto end;
}
}
end:
switch_mutex_unlock(tech_pvt->sofia_mutex);
return status;
}
static switch_status_t sofia_on_routing(switch_core_session_t *session)
{
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_assert(tech_pvt != NULL);
if (sofia_test_pflag(tech_pvt->profile, PFLAG_AUTO_INVITE_100) &&
!switch_channel_test_flag(channel, CF_ANSWERED) &&
switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_INBOUND) {
if (sofia_acknowledge_call(session) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Call appears to be already acknowledged\n");
}
}
if (!sofia_test_flag(tech_pvt, TFLAG_HOLD_LOCK)) {
sofia_clear_flag_locked(tech_pvt, TFLAG_SIP_HOLD);
switch_channel_clear_flag(channel, CF_LEG_HOLDING);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s SOFIA ROUTING\n",
switch_channel_get_name(switch_core_session_get_channel(session)));
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t sofia_on_reset(switch_core_session_t *session)
{
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_assert(tech_pvt != NULL);
if (!sofia_test_flag(tech_pvt, TFLAG_HOLD_LOCK)) {
sofia_clear_flag_locked(tech_pvt, TFLAG_SIP_HOLD);
switch_channel_clear_flag(channel, CF_LEG_HOLDING);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s SOFIA RESET\n",
switch_channel_get_name(switch_core_session_get_channel(session)));
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t sofia_on_hibernate(switch_core_session_t *session)
{
private_object_t *tech_pvt = switch_core_session_get_private(session);
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_assert(tech_pvt != NULL);
if (!sofia_test_flag(tech_pvt, TFLAG_HOLD_LOCK)) {
sofia_clear_flag_locked(tech_pvt, TFLAG_SIP_HOLD);
switch_channel_clear_flag(channel, CF_LEG_HOLDING);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s SOFIA HIBERNATE\n",
switch_channel_get_name(switch_core_session_get_channel(session)));
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t sofia_on_execute(switch_core_session_t *session)
{
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_assert(tech_pvt != NULL);
if (!sofia_test_flag(tech_pvt, TFLAG_HOLD_LOCK)) {
sofia_clear_flag_locked(tech_pvt, TFLAG_SIP_HOLD);
switch_channel_clear_flag(channel, CF_LEG_HOLDING);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s SOFIA EXECUTE\n",
switch_channel_get_name(switch_core_session_get_channel(session)));
return SWITCH_STATUS_SUCCESS;
}
char *generate_pai_str(private_object_t *tech_pvt)
{
switch_core_session_t *session = tech_pvt->session;
const char *callee_name = NULL, *callee_number = NULL;
const char *var, *header, *ua = switch_channel_get_variable(tech_pvt->channel, "sip_user_agent");
char *pai = NULL;
const char *host = switch_channel_get_variable(tech_pvt->channel, "sip_to_host");
if (zstr(host)) {
host = tech_pvt->profile->sipip;
}
if (!sofia_test_pflag(tech_pvt->profile, PFLAG_PASS_CALLEE_ID) || !sofia_test_pflag(tech_pvt->profile, PFLAG_CID_IN_1XX) ||
((var = switch_channel_get_variable(tech_pvt->channel, "sip_cid_in_1xx")) && switch_false(var))) {
return NULL;
}
if (zstr((callee_name = switch_channel_get_variable(tech_pvt->channel, "initial_callee_id_name"))) &&
zstr((callee_name = switch_channel_get_variable(tech_pvt->channel, "effective_callee_id_name"))) &&
zstr((callee_name = switch_channel_get_variable(tech_pvt->channel, "sip_callee_id_name")))) {
callee_name = switch_channel_get_variable(tech_pvt->channel, "callee_id_name");
}
if (zstr((callee_number = switch_channel_get_variable(tech_pvt->channel, "initial_callee_id_number"))) &&
zstr((callee_number = switch_channel_get_variable(tech_pvt->channel, "effective_callee_id_number"))) &&
zstr((callee_number = switch_channel_get_variable(tech_pvt->channel, "sip_callee_id_number"))) &&
zstr((callee_number = switch_channel_get_variable(tech_pvt->channel, "callee_id_number")))) {
callee_number = tech_pvt->caller_profile->destination_number;
}
if (zstr(callee_name) && !zstr(callee_number)) {
callee_name = callee_number;
}
callee_number = switch_sanitize_number(switch_core_session_strdup(session, callee_number));
callee_name = switch_sanitize_number(switch_core_session_strdup(session, callee_name));
if (!zstr(callee_number) && (zstr(ua) || !switch_stristr("polycom", ua))) {
callee_number = switch_core_session_sprintf(session, "sip:%s@%s", callee_number, host);
}
header = (tech_pvt->cid_type == CID_TYPE_RPID && !switch_stristr("aastra", ua)) ? "Remote-Party-ID" : "P-Asserted-Identity";
if (!zstr(callee_name) && strcmp(callee_name, "_undef_") && !zstr(callee_number)) {
check_decode(callee_name, tech_pvt->session);
if (switch_stristr("update_display", tech_pvt->x_freeswitch_support_remote)) {
pai = switch_core_session_sprintf(tech_pvt->session, "%s: \"%s\" <%s>%s\n"
"X-FS-Display-Name: %s\nX-FS-Display-Number: %s\n",
header, callee_name, callee_number,
tech_pvt->cid_type == CID_TYPE_RPID && !switch_stristr("aastra", ua) ?
";party=calling;privacy=off;screen=no" : "",
callee_name, callee_number);
} else {
pai = switch_core_session_sprintf(tech_pvt->session, "%s: \"%s\" <%s>%s\n", header, callee_name, callee_number,
tech_pvt->cid_type == CID_TYPE_RPID && !switch_stristr("aastra", ua) ?
";party=calling;privacy=off;screen=no" : "");
}
}
return pai;
}
static switch_jb_t *sofia_get_jb(switch_core_session_t *session, switch_media_type_t type)
{
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
return switch_core_media_get_jb(tech_pvt->session, type);
}
/* map QSIG cause codes to SIP from RFC4497 section 8.4.1 */
static int hangup_cause_to_sip(switch_call_cause_t cause)
{
switch (cause) {
case SWITCH_CAUSE_UNALLOCATED_NUMBER:
case SWITCH_CAUSE_NO_ROUTE_TRANSIT_NET:
case SWITCH_CAUSE_NO_ROUTE_DESTINATION:
return 404;
case SWITCH_CAUSE_USER_BUSY:
return 486;
case SWITCH_CAUSE_NO_USER_RESPONSE:
return 408;
case SWITCH_CAUSE_NO_ANSWER:
case SWITCH_CAUSE_SUBSCRIBER_ABSENT:
return 480;
case SWITCH_CAUSE_CALL_REJECTED:
return 603;
case SWITCH_CAUSE_NUMBER_CHANGED:
case SWITCH_CAUSE_REDIRECTION_TO_NEW_DESTINATION:
return 410;
case SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER:
case SWITCH_CAUSE_INVALID_PROFILE:
return 502;
case SWITCH_CAUSE_INVALID_NUMBER_FORMAT:
case SWITCH_CAUSE_INVALID_URL:
case SWITCH_CAUSE_INVALID_GATEWAY:
return 484;
case SWITCH_CAUSE_FACILITY_REJECTED:
return 501;
case SWITCH_CAUSE_NORMAL_UNSPECIFIED:
return 480;
case SWITCH_CAUSE_REQUESTED_CHAN_UNAVAIL:
case SWITCH_CAUSE_NORMAL_CIRCUIT_CONGESTION:
case SWITCH_CAUSE_NETWORK_OUT_OF_ORDER:
case SWITCH_CAUSE_NORMAL_TEMPORARY_FAILURE:
case SWITCH_CAUSE_SWITCH_CONGESTION:
case SWITCH_CAUSE_GATEWAY_DOWN:
return 503;
case SWITCH_CAUSE_OUTGOING_CALL_BARRED:
case SWITCH_CAUSE_INCOMING_CALL_BARRED:
case SWITCH_CAUSE_BEARERCAPABILITY_NOTAUTH:
return 403;
case SWITCH_CAUSE_BEARERCAPABILITY_NOTAVAIL:
return 503;
case SWITCH_CAUSE_BEARERCAPABILITY_NOTIMPL:
case SWITCH_CAUSE_INCOMPATIBLE_DESTINATION:
return 488;
case SWITCH_CAUSE_FACILITY_NOT_IMPLEMENTED:
case SWITCH_CAUSE_SERVICE_NOT_IMPLEMENTED:
return 501;
case SWITCH_CAUSE_RECOVERY_ON_TIMER_EXPIRE:
return 504;
case SWITCH_CAUSE_ORIGINATOR_CANCEL:
return 487;
case SWITCH_CAUSE_EXCHANGE_ROUTING_ERROR:
return 483;
/* Custom mappings not part of RFC */
case SWITCH_CAUSE_BUSY_EVERYWHERE:
return 600;
case SWITCH_CAUSE_DECLINE:
return 603;
case SWITCH_CAUSE_DOES_NOT_EXIST_ANYWHERE:
return 604;
case SWITCH_CAUSE_NOT_ACCEPTABLE:
return 606;
case SWITCH_CAUSE_UNWANTED:
return 607;
/* STIR/SHAKEN */
case SWITCH_CAUSE_NO_IDENTITY:
return 428;
case SWITCH_CAUSE_BAD_IDENTITY_INFO:
return 429;
case SWITCH_CAUSE_UNSUPPORTED_CERTIFICATE:
return 437;
case SWITCH_CAUSE_INVALID_IDENTITY:
return 438;
case SWITCH_CAUSE_STALE_DATE:
return 403;
default:
return 480;
}
}
switch_status_t sofia_on_destroy(switch_core_session_t *session)
{
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s SOFIA DESTROY\n", switch_channel_get_name(channel));
if (tech_pvt) {
if (tech_pvt->proxy_refer_msg) {
msg_ref_destroy(tech_pvt->proxy_refer_msg);
tech_pvt->proxy_refer_msg = NULL;
}
if (tech_pvt->respond_phrase) {
switch_yield(100000);
}
if (!zstr(tech_pvt->call_id)) {
switch_core_hash_delete_locked(tech_pvt->profile->chat_hash, tech_pvt->call_id, tech_pvt->profile->flag_mutex);
}
switch_mutex_lock(tech_pvt->profile->flag_mutex);
tech_pvt->profile->inuse--;
switch_mutex_unlock(tech_pvt->profile->flag_mutex);
switch_media_handle_destroy(session);
if (sofia_test_pflag(tech_pvt->profile, PFLAG_DESTROY) && !tech_pvt->profile->inuse) {
sofia_profile_destroy(tech_pvt->profile);
}
}
return SWITCH_STATUS_SUCCESS;
}
switch_status_t sofia_on_hangup(switch_core_session_t *session)
{
switch_core_session_t *a_session;
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_call_cause_t cause = switch_channel_get_cause(channel);
int sip_cause = hangup_cause_to_sip(cause);
const char *ps_cause = NULL, *use_my_cause;
const char *gateway_name = NULL;
sofia_gateway_t *gateway_ptr = NULL;
if ((gateway_name = switch_channel_get_variable(channel, "sip_gateway_name"))) {
gateway_ptr = sofia_reg_find_gateway(gateway_name);
}
if (!tech_pvt) {
return SWITCH_STATUS_SUCCESS;
}
switch_mutex_lock(tech_pvt->sofia_mutex);
if (!switch_channel_test_flag(channel, CF_ANSWERED)) {
if (switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
tech_pvt->profile->ob_failed_calls++;
} else {
tech_pvt->profile->ib_failed_calls++;
}
if (gateway_ptr) {
if (switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
gateway_ptr->ob_failed_calls++;
} else {
gateway_ptr->ib_failed_calls++;
}
}
}
if (gateway_ptr) {
sofia_reg_release_gateway(gateway_ptr);
}
if (!((use_my_cause = switch_channel_get_variable(channel, "sip_ignore_remote_cause")) && switch_true(use_my_cause))) {
ps_cause = switch_channel_get_variable(channel, "last_bridge_" SWITCH_PROTO_SPECIFIC_HANGUP_CAUSE_VARIABLE);
}
if (!zstr(ps_cause) && (!strncasecmp(ps_cause, "sip:", 4) || !strncasecmp(ps_cause, "sips:", 5))) {
int new_cause = atoi(sofia_glue_strip_proto(ps_cause));
if (new_cause) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s Overriding SIP cause %d with %d from the other leg\n",
switch_channel_get_name(channel), sip_cause, new_cause);
sip_cause = new_cause;
}
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Channel %s hanging up, cause: %s\n",
switch_channel_get_name(channel), switch_channel_cause2str(cause));
if (tech_pvt->hash_key && !sofia_test_pflag(tech_pvt->profile, PFLAG_DESTROY)) {
switch_core_hash_delete_locked(tech_pvt->profile->chat_hash, tech_pvt->hash_key, tech_pvt->profile->flag_mutex);
}
if (session && tech_pvt->profile->pres_type) {
char *sql = switch_mprintf("delete from sip_dialogs where uuid='%q'", switch_core_session_get_uuid(session));
switch_assert(sql);
sofia_glue_execute_sql_now(tech_pvt->profile, &sql, SWITCH_TRUE);
}
if (tech_pvt->kick && (a_session = switch_core_session_locate(tech_pvt->kick))) {
switch_channel_t *a_channel = switch_core_session_get_channel(a_session);
switch_channel_hangup(a_channel, switch_channel_get_cause(channel));
switch_core_session_rwunlock(a_session);
}
if (sofia_test_pflag(tech_pvt->profile, PFLAG_DESTROY)) {
sofia_set_flag(tech_pvt, TFLAG_BYE);
} else if (tech_pvt->nh && !sofia_test_flag(tech_pvt, TFLAG_BYE)) {
char reason[128] = "";
char *bye_headers = sofia_glue_get_extra_headers(channel, SOFIA_SIP_BYE_HEADER_PREFIX);
const char *val = NULL;
const char *max_forwards = switch_channel_get_variable(channel, SWITCH_MAX_FORWARDS_VARIABLE);
const char *call_info = switch_channel_get_variable(channel, "presence_call_info_full");
const char *session_id_header = sofia_glue_session_id_header(session, tech_pvt->profile);
val = switch_channel_get_variable(tech_pvt->channel, "disable_q850_reason");
if (!val || switch_false(val)) {
if ((val = switch_channel_get_variable(tech_pvt->channel, "sip_reason"))) {
switch_snprintf(reason, sizeof(reason), "%s", val);
} else {
if ((switch_channel_test_flag(channel, CF_INTERCEPT) || cause == SWITCH_CAUSE_PICKED_OFF || cause == SWITCH_CAUSE_LOSE_RACE)
&& !switch_true(switch_channel_get_variable(channel, "ignore_completed_elsewhere"))) {
switch_snprintf(reason, sizeof(reason), "SIP;cause=200;text=\"Call completed elsewhere\"");
} else if (cause > 0 && cause < 128) {
switch_snprintf(reason, sizeof(reason), "Q.850;cause=%d;text=\"%s\"", cause, switch_channel_cause2str(cause));
} else {
switch_snprintf(reason, sizeof(reason), "SIP;cause=%d;text=\"%s\"", cause, switch_channel_cause2str(cause));
}
}
}
if (switch_channel_test_flag(channel, CF_INTERCEPT) || cause == SWITCH_CAUSE_PICKED_OFF || cause == SWITCH_CAUSE_LOSE_RACE) {
switch_channel_set_variable(channel, "call_completed_elsewhere", "true");
}
if (switch_channel_test_flag(channel, CF_ANSWERED) || sofia_test_flag(tech_pvt, TFLAG_ANS)) {
if (!tech_pvt->got_bye) {
switch_channel_set_variable(channel, "sip_hangup_disposition", "send_bye");
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Sending BYE to %s\n", switch_channel_get_name(channel));
if (!sofia_test_flag(tech_pvt, TFLAG_BYE)) {
nua_bye(tech_pvt->nh,
TAG_IF(!zstr(tech_pvt->route_uri), NUTAG_PROXY(tech_pvt->route_uri)),
SIPTAG_CONTACT(SIP_NONE),
TAG_IF(!zstr(reason), SIPTAG_REASON_STR(reason)),
TAG_IF(call_info, SIPTAG_CALL_INFO_STR(call_info)),
TAG_IF(!zstr(tech_pvt->user_via), SIPTAG_VIA_STR(tech_pvt->user_via)),
TAG_IF(!zstr(bye_headers), SIPTAG_HEADER_STR(bye_headers)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
TAG_END());
}
} else {
if (switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Sending CANCEL to %s\n", switch_channel_get_name(channel));
if (!tech_pvt->got_bye) {
switch_channel_set_variable(channel, "sip_hangup_disposition", "send_cancel");
switch_channel_set_variable(channel, "sip_invite_failure_status", "487");
switch_channel_set_variable(channel, "sip_invite_failure_phrase", "CANCEL");
}
if (!sofia_test_flag(tech_pvt, TFLAG_BYE)) {
nua_cancel(tech_pvt->nh,
SIPTAG_CONTACT(SIP_NONE),
TAG_IF(call_info, SIPTAG_CALL_INFO_STR(call_info)),
TAG_IF(!zstr(reason), SIPTAG_REASON_STR(reason)), TAG_IF(!zstr(bye_headers), SIPTAG_HEADER_STR(bye_headers)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
TAG_END());
}
} else {
char *resp_headers = sofia_glue_get_extra_headers(channel, SOFIA_SIP_RESPONSE_HEADER_PREFIX);
const char *phrase;
char *added_headers = NULL;
if (tech_pvt->respond_phrase) {
//phrase = su_strdup(nua_handle_home(tech_pvt->nh), tech_pvt->respond_phrase);
phrase = tech_pvt->respond_phrase;
} else {
phrase = sip_status_phrase(sip_cause);
}
if (tech_pvt->respond_code) {
sip_cause = tech_pvt->respond_code;
switch (sip_cause) {
case 401:
case 407:
{
const char *to_host = switch_channel_get_variable(channel, "sip_challenge_realm");
if (zstr(to_host)) {
to_host = switch_channel_get_variable(channel, "sip_to_host");
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Challenging call\n");
sofia_reg_auth_challenge(tech_pvt->profile, tech_pvt->nh, NULL, REG_INVITE, to_host, 0, 0);
*reason = '\0';
}
break;
case 484:
{
const char *to = switch_channel_get_variable(channel, "sip_to_uri");
char *to_uri = NULL;
if (to) {
char *p;
to_uri = switch_core_session_sprintf(session, "sip:%s", to);
if ((p = strstr(to_uri, ":5060"))) {
*p = '\0';
}
tech_pvt->respond_dest = to_uri;
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Overlap Dial with %d %s\n", sip_cause, phrase);
}
break;
default:
break;
}
}
if (tech_pvt->respond_dest && !sofia_test_pflag(tech_pvt->profile, PFLAG_MANUAL_REDIRECT)) {
added_headers = sofia_glue_get_extra_headers(channel, SOFIA_SIP_HEADER_PREFIX);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Responding to INVITE with: %d\n", sip_cause);
if (!tech_pvt->got_bye) {
switch_channel_set_variable(channel, "sip_hangup_disposition", "send_refuse");
}
if (!sofia_test_flag(tech_pvt, TFLAG_BYE)) {
char *cid = generate_pai_str(tech_pvt);
if (sip_cause > 299) {
switch_channel_clear_app_flag_key("T38", tech_pvt->channel, CF_APP_T38);
switch_channel_clear_app_flag_key("T38", tech_pvt->channel, CF_APP_T38_REQ);
switch_channel_set_app_flag_key("T38", tech_pvt->channel, CF_APP_T38_FAIL);
}
nua_respond(tech_pvt->nh, sip_cause, phrase,
TAG_IF(!zstr(reason), SIPTAG_REASON_STR(reason)),
TAG_IF(cid, SIPTAG_HEADER_STR(cid)),
TAG_IF(!zstr(bye_headers), SIPTAG_HEADER_STR(bye_headers)),
TAG_IF(!zstr(resp_headers), SIPTAG_HEADER_STR(resp_headers)),
TAG_IF(!zstr(added_headers), SIPTAG_HEADER_STR(added_headers)),
TAG_IF(tech_pvt->respond_dest, SIPTAG_CONTACT_STR(tech_pvt->respond_dest)),
TAG_IF(!zstr(max_forwards), SIPTAG_MAX_FORWARDS_STR(max_forwards)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
TAG_END());
switch_safe_free(resp_headers);
}
switch_safe_free(added_headers);
}
}
sofia_set_flag_locked(tech_pvt, TFLAG_BYE);
switch_safe_free(bye_headers);
}
if (cause == SWITCH_CAUSE_WRONG_CALL_STATE) {
switch_event_t *s_event;
if (switch_event_create_subclass(&s_event, SWITCH_EVENT_CUSTOM, MY_EVENT_WRONG_CALL_STATE) == SWITCH_STATUS_SUCCESS) {
switch_event_add_header_string(s_event, SWITCH_STACK_BOTTOM, "from_user", tech_pvt->from_user);
switch_event_add_header_string(s_event, SWITCH_STACK_BOTTOM, "network_ip", tech_pvt->mparams.remote_ip);
switch_event_add_header(s_event, SWITCH_STACK_BOTTOM, "network_port", "%d", tech_pvt->mparams.remote_port);
switch_event_fire(&s_event);
}
}
sofia_clear_flag(tech_pvt, TFLAG_IO);
if (tech_pvt->sofia_private) {
/* set to NULL so that switch_core_session_locate no longer succeeds, but don't lose the UUID in uuid_str so we
* can fire events with session UUID */
tech_pvt->sofia_private->uuid = NULL;
}
switch_mutex_unlock(tech_pvt->sofia_mutex);
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t sofia_on_exchange_media(switch_core_session_t *session)
{
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "SOFIA EXCHANGE_MEDIA\n");
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t sofia_on_soft_execute(switch_core_session_t *session)
{
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "SOFIA SOFT_EXECUTE\n");
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t sofia_acknowledge_call(switch_core_session_t *session)
{
struct private_object *tech_pvt = switch_core_session_get_private(session);
const char *session_id_header = sofia_glue_session_id_header(session, tech_pvt->profile);
if (!tech_pvt->sent_100) {
nua_respond(tech_pvt->nh, SIP_100_TRYING, TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)), TAG_END());
tech_pvt->sent_100 = 1;
return SWITCH_STATUS_SUCCESS;
}
return SWITCH_STATUS_FALSE;
}
static switch_status_t sofia_answer_channel(switch_core_session_t *session)
{
private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_status_t status;
uint32_t session_timeout = tech_pvt->profile->session_timeout;
const char *val;
const char *b_sdp = NULL;
int is_proxy = 0;
int is_3pcc_proxy = 0;
int is_3pcc = 0;
char *sticky = NULL;
const char *call_info = switch_channel_get_variable(channel, "presence_call_info_full");
const char *session_id_header = sofia_glue_session_id_header(session, tech_pvt->profile);
if(sofia_acknowledge_call(session) == SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Dialplan did not acknowledge_call; sent 100 Trying");
}
if (switch_channel_test_flag(channel, CF_CONFERENCE) && !zstr(tech_pvt->reply_contact) && !switch_stristr(";isfocus", tech_pvt->reply_contact)) {
tech_pvt->reply_contact = switch_core_session_sprintf(session, "%s;isfocus", tech_pvt->reply_contact);
}
//switch_core_media_set_local_sdp
if(sofia_test_flag(tech_pvt, TFLAG_3PCC_INVITE)) {
// SNARK: complete hack to get final ack sent when a 3pcc invite has been passed from the other leg in bypass_media mode.
// This code handles the pass_indication sent after the 3pcc ack is received by the other leg in the is_3pcc && is_proxy case below.
// Is there a better place to hang this...?
b_sdp = switch_channel_get_variable(channel, SWITCH_B_SDP_VARIABLE);
switch_core_media_set_local_sdp(session, b_sdp, SWITCH_TRUE);
if (switch_channel_test_flag(tech_pvt->channel, CF_PROXY_MEDIA)) {
sofia_media_activate_rtp(tech_pvt);
switch_core_media_patch_sdp(tech_pvt->session);
switch_core_media_proxy_remote_addr(tech_pvt->session, NULL);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG,
"3PCC-PROXY nomedia - sending ack, SDP:\n%s\n", tech_pvt->mparams.local_sdp_str);
if (sofia_use_soa(tech_pvt)) {
nua_ack(tech_pvt->nh,
TAG_IF(!zstr(tech_pvt->user_via), SIPTAG_VIA_STR(tech_pvt->user_via)),
SIPTAG_CONTACT_STR(tech_pvt->reply_contact),
SOATAG_USER_SDP_STR(tech_pvt->mparams.local_sdp_str),
SOATAG_REUSE_REJECTED(1),
SOATAG_RTP_SELECT(1),
SOATAG_AUDIO_AUX("cn telephone-event"),
TAG_IF(sofia_test_pflag(tech_pvt->profile, PFLAG_DISABLE_100REL), NUTAG_INCLUDE_EXTRA_SDP(1)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
TAG_END());
} else {
nua_ack(tech_pvt->nh,
NUTAG_MEDIA_ENABLE(0),
TAG_IF(!zstr(tech_pvt->user_via), SIPTAG_VIA_STR(tech_pvt->user_via)),
SIPTAG_CONTACT_STR(tech_pvt->reply_contact),
TAG_IF(tech_pvt->mparams.local_sdp_str, SIPTAG_CONTENT_TYPE_STR("application/sdp")),
TAG_IF(tech_pvt->mparams.local_sdp_str, SIPTAG_PAYLOAD_STR(tech_pvt->mparams.local_sdp_str)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
SOATAG_AUDIO_AUX("cn telephone-event"),
TAG_END());
}
sofia_clear_flag(tech_pvt, TFLAG_3PCC_INVITE); // all done
sofia_set_flag_locked(tech_pvt, TFLAG_ANS);
sofia_set_flag_locked(tech_pvt, TFLAG_SDP);
switch_channel_mark_answered(channel); // ... and remember to actually answer the call!
return SWITCH_STATUS_SUCCESS;
}
if (sofia_test_flag(tech_pvt, TFLAG_ANS) || switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND) {
return SWITCH_STATUS_SUCCESS;
}
b_sdp = switch_channel_get_variable(channel, SWITCH_B_SDP_VARIABLE);
is_proxy = (switch_channel_test_flag(channel, CF_PROXY_MODE) || switch_channel_test_flag(channel, CF_PROXY_MEDIA));
is_3pcc_proxy = (sofia_test_pflag(tech_pvt->profile, PFLAG_3PCC_PROXY) && sofia_test_flag(tech_pvt, TFLAG_3PCC));
is_3pcc = (!sofia_test_pflag(tech_pvt->profile, PFLAG_3PCC_PROXY) && sofia_test_flag(tech_pvt, TFLAG_3PCC));
if (b_sdp && is_proxy && !is_3pcc_proxy) {
switch_core_media_set_local_sdp(session, b_sdp, SWITCH_TRUE);
if (switch_channel_test_flag(channel, CF_PROXY_MEDIA)) {
switch_core_media_patch_sdp(tech_pvt->session);
if (sofia_media_activate_rtp(tech_pvt) != SWITCH_STATUS_SUCCESS) {
return SWITCH_STATUS_FALSE;
}
}
} else {
/* This if statement check and handles the 3pcc proxy mode */
if (is_3pcc) {
switch_core_media_prepare_codecs(tech_pvt->session, SWITCH_TRUE);
tech_pvt->mparams.local_sdp_str = NULL;
switch_core_media_choose_port(tech_pvt->session, SWITCH_MEDIA_TYPE_AUDIO, 0);
switch_core_media_gen_local_sdp(session, SDP_TYPE_RESPONSE, NULL, 0, NULL, 0);
} else if (is_3pcc_proxy) {
if (!(sofia_test_pflag(tech_pvt->profile, PFLAG_3PCC_PROXY))) {
switch_channel_set_flag(channel, CF_3PCC);
}
if (b_sdp && is_proxy && !switch_channel_var_true(channel, "3pcc_always_gen_sdp")) {
switch_core_media_set_local_sdp(session, b_sdp, SWITCH_TRUE);
} else {
switch_core_media_choose_port(tech_pvt->session, SWITCH_MEDIA_TYPE_AUDIO, 0);
switch_core_media_prepare_codecs(session, 1);
switch_core_media_gen_local_sdp(session, SDP_TYPE_REQUEST, NULL, 0, NULL, 1);
sofia_set_flag_locked(tech_pvt, TFLAG_3PCC);
}
if (switch_channel_test_flag(channel, CF_PROXY_MEDIA)) {
switch_core_media_patch_sdp(tech_pvt->session);
if (sofia_media_activate_rtp(tech_pvt) != SWITCH_STATUS_SUCCESS) {
return SWITCH_STATUS_FALSE;
}
}
}
if (is_3pcc || is_3pcc_proxy) {
/* Send the 200 OK */
if (!sofia_test_flag(tech_pvt, TFLAG_BYE)) {
char *extra_headers = sofia_glue_get_extra_headers(channel, SOFIA_SIP_RESPONSE_HEADER_PREFIX);
if (sofia_use_soa(tech_pvt)) {
nua_respond(tech_pvt->nh, SIP_200_OK,
TAG_IF(is_proxy, NUTAG_AUTOANSWER(0)),
SIPTAG_CONTACT_STR(tech_pvt->profile->url),
SOATAG_USER_SDP_STR(tech_pvt->mparams.local_sdp_str),
TAG_IF(call_info, SIPTAG_CALL_INFO_STR(call_info)),
SOATAG_REUSE_REJECTED(1),
SOATAG_RTP_SELECT(1),
SOATAG_AUDIO_AUX("cn telephone-event"), NUTAG_INCLUDE_EXTRA_SDP(1),
TAG_IF(!zstr(extra_headers), SIPTAG_HEADER_STR(extra_headers)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
TAG_IF(switch_stristr("update_display", tech_pvt->x_freeswitch_support_remote),
SIPTAG_HEADER_STR("X-FS-Support: " FREESWITCH_SUPPORT)), TAG_END());
} else {
nua_respond(tech_pvt->nh, SIP_200_OK,
NUTAG_MEDIA_ENABLE(0),
SIPTAG_CONTACT_STR(tech_pvt->profile->url),
TAG_IF(!zstr(extra_headers), SIPTAG_HEADER_STR(extra_headers)),
TAG_IF(call_info, SIPTAG_CALL_INFO_STR(call_info)),
SIPTAG_CONTENT_TYPE_STR("application/sdp"),
SIPTAG_PAYLOAD_STR(tech_pvt->mparams.local_sdp_str),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
TAG_IF(switch_stristr("update_display", tech_pvt->x_freeswitch_support_remote),
SIPTAG_HEADER_STR("X-FS-Support: " FREESWITCH_SUPPORT)), TAG_END());
}
switch_safe_free(extra_headers);
}
if (is_3pcc_proxy) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "3PCC-PROXY, Sent a 200 OK, waiting for ACK\n");
/* Unlock the session signal to allow the ack to make it in */
// Maybe we should timeout?
switch_mutex_unlock(tech_pvt->sofia_mutex);
while (switch_channel_ready(channel) && !sofia_test_flag(tech_pvt, TFLAG_3PCC_HAS_ACK)) {
switch_cond_next();
}
/* Regain lock on sofia */
switch_mutex_lock(tech_pvt->sofia_mutex);
if (is_proxy) {
sofia_clear_flag(tech_pvt, TFLAG_3PCC_HAS_ACK);
sofia_clear_flag(tech_pvt, TFLAG_3PCC);
switch_core_session_pass_indication(session, SWITCH_MESSAGE_INDICATE_ANSWER);
}
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "3PCC-PROXY, Done waiting for ACK\n");
return SWITCH_STATUS_SUCCESS;
}
}
if ((is_proxy && !b_sdp) || sofia_test_flag(tech_pvt, TFLAG_LATE_NEGOTIATION) ||
switch_core_media_codec_chosen(tech_pvt->session, SWITCH_MEDIA_TYPE_AUDIO) != SWITCH_STATUS_SUCCESS) {
sofia_clear_flag_locked(tech_pvt, TFLAG_LATE_NEGOTIATION);
if (is_proxy) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Disabling proxy mode due to call answer with no bridge\n");
switch_channel_clear_flag(channel, CF_PROXY_MEDIA);
switch_channel_clear_flag(channel, CF_PROXY_MODE);
}
if (switch_channel_direction(tech_pvt->channel) == SWITCH_CALL_DIRECTION_INBOUND) {
const char *r_sdp = switch_channel_get_variable(channel, SWITCH_R_SDP_VARIABLE);
switch_core_media_prepare_codecs(tech_pvt->session, SWITCH_TRUE);
if (zstr(r_sdp) || sofia_media_tech_media(tech_pvt, r_sdp, SDP_TYPE_REQUEST) != SWITCH_STATUS_SUCCESS) {
switch_channel_set_variable(channel, SWITCH_ENDPOINT_DISPOSITION_VARIABLE, "CODEC NEGOTIATION ERROR");
//switch_mutex_lock(tech_pvt->sofia_mutex);
//nua_respond(tech_pvt->nh, SIP_488_NOT_ACCEPTABLE, TAG_END());
//switch_mutex_unlock(tech_pvt->sofia_mutex);
return SWITCH_STATUS_FALSE;
}
}
}
if ((status = switch_core_media_choose_port(tech_pvt->session, SWITCH_MEDIA_TYPE_AUDIO, 0)) != SWITCH_STATUS_SUCCESS) {
switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
return status;
}
switch_core_media_gen_local_sdp(session, SDP_TYPE_RESPONSE, NULL, 0, NULL, 0);
if (sofia_media_activate_rtp(tech_pvt) != SWITCH_STATUS_SUCCESS) {
switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
}
if (tech_pvt->nh) {
if (tech_pvt->mparams.local_sdp_str) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Local SDP %s:\n%s\n", switch_channel_get_name(channel),
tech_pvt->mparams.local_sdp_str);
}
}
}
if (sofia_test_flag(tech_pvt, TFLAG_NAT) ||
(val = switch_channel_get_variable(channel, "sip-force-contact")) ||
((val = switch_channel_get_variable(channel, "sip_sticky_contact")) && switch_true(val))) {
sticky = tech_pvt->record_route;
session_timeout = SOFIA_NAT_SESSION_TIMEOUT;
switch_channel_set_variable(channel, "sip_nat_detected", "true");
}
if ((val = switch_channel_get_variable(channel, SOFIA_SESSION_TIMEOUT))) {
int v_session_timeout = atoi(val);
if (v_session_timeout >= 0) {
session_timeout = v_session_timeout;
}
}
if (!sofia_test_flag(tech_pvt, TFLAG_BYE)) {
char *extra_headers = sofia_glue_get_extra_headers(channel, SOFIA_SIP_RESPONSE_HEADER_PREFIX);
char *cid = NULL;
cid = generate_pai_str(tech_pvt);
if (switch_channel_test_flag(tech_pvt->channel, CF_PROXY_MODE) && tech_pvt->mparams.early_sdp && tech_pvt->mparams.local_sdp_str) {
char *a, *b;
/* start at the s= line to avoid some devices who update the o= between messages */
a = strstr(tech_pvt->mparams.early_sdp, "s=");
b = strstr(tech_pvt->mparams.local_sdp_str, "s=");
if (!a || !b || strcmp(a, b)) {
/* The SIP RFC for SOA forbids sending a 183 with one sdp then a 200 with another but it won't do us much good unless
we do so in this case we will abandon the SOA rules and go rogue.
*/
sofia_clear_flag(tech_pvt, TFLAG_ENABLE_SOA);
}
}
if ((tech_pvt->mparams.last_sdp_str && strstr(tech_pvt->mparams.last_sdp_str, "a=setup")) ||
(tech_pvt->mparams.local_sdp_str && strstr(tech_pvt->mparams.local_sdp_str, "a=setup"))) {
session_timeout = 0;
}
if ((tech_pvt->session_timeout = session_timeout)) {
tech_pvt->session_refresher = switch_channel_direction(channel) == SWITCH_CALL_DIRECTION_OUTBOUND ? nua_local_refresher : nua_remote_refresher;
if (sofia_test_pflag(tech_pvt->profile, PFLAG_UPDATE_REFRESHER) || switch_channel_var_true(tech_pvt->channel, "sip_update_refresher")) {
tech_pvt->update_refresher = 1;
}
} else {
tech_pvt->session_refresher = nua_no_refresher;
}
if (sofia_use_soa(tech_pvt)) {
nua_respond(tech_pvt->nh, SIP_200_OK,
NUTAG_AUTOANSWER(0),
TAG_IF(call_info, SIPTAG_CALL_INFO_STR(call_info)),
TAG_IF(sticky, NUTAG_PROXY(tech_pvt->record_route)),
TAG_IF(cid, SIPTAG_HEADER_STR(cid)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),
NUTAG_SESSION_TIMER(tech_pvt->session_timeout),
NUTAG_SESSION_REFRESHER(tech_pvt->session_refresher),
NUTAG_UPDATE_REFRESH(tech_pvt->update_refresher),
SIPTAG_CONTACT_STR(tech_pvt->reply_contact),
SIPTAG_CALL_INFO_STR(switch_channel_get_variable(tech_pvt->channel, SOFIA_SIP_HEADER_PREFIX "call_info")),
SOATAG_USER_SDP_STR(tech_pvt->mparams.local_sdp_str),
SOATAG_REUSE_REJECTED(1),
SOATAG_AUDIO_AUX("cn telephone-event"),
TAG_IF(sofia_test_pflag(tech_pvt->profile, PFLAG_DISABLE_100REL), NUTAG_INCLUDE_EXTRA_SDP(1)),
SOATAG_RTP_SELECT(1),
TAG_IF(!zstr(extra_headers), SIPTAG_HEADER_STR(extra_headers)),
TAG_IF(switch_stristr("update_display", tech_pvt->x_freeswitch_support_remote),
SIPTAG_HEADER_STR("X-FS-Support: " FREESWITCH_SUPPORT)), TAG_END());
} else {
nua_respond(tech_pvt->nh, SIP_200_OK,
NUTAG_AUTOANSWER(0),
NUTAG_MEDIA_ENABLE(0),
TAG_IF(call_info, SIPTAG_CALL_INFO_STR(call_info)),
TAG_IF(sticky, NUTAG_PROXY(tech_pvt->record_route)),
TAG_IF(cid, SIPTAG_HEADER_STR(cid)),
TAG_IF(!zstr(session_id_header), SIPTAG_HEADER_STR(session_id_header)),