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freeswitch/libs/sofia-sip/libsofia-sip-ua/nua/nua_stack.c

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/*
* This file is part of the Sofia-SIP package
*
* Copyright (C) 2005 Nokia Corporation.
*
* Contact: Pekka Pessi <pekka.pessi@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
/**@CFILE nua_stack.c
* @brief Sofia-SIP User Agent Engine implementation
*
* @author Pekka Pessi <Pekka.Pessi@nokia.com>
* @author Kai Vehmanen <Kai.Vehmanen@nokia.com>
* @author Martti Mela <Martti Mela@nokia.com>
* @author Remeres Jacobs <Remeres.Jacobs@nokia.com>
* @author Tat Chan <Tat.Chan@nokia.com>
*
* @date Created: Wed Feb 14 18:32:58 2001 ppessi
*/
#include "config.h"
#include <sofia-sip/su_tag_class.h>
#include <sofia-sip/su_tag_inline.h>
#include <sofia-sip/su_tagarg.h>
#include <sofia-sip/su_strlst.h>
#include <sofia-sip/su_uniqueid.h>
#include <sofia-sip/su_tag_io.h>
#define SU_ROOT_MAGIC_T struct nua_s
#define SU_MSG_ARG_T struct nua_ee_data
#define NUA_SAVED_EVENT_T su_msg_t *
#define NUA_SAVED_SIGNAL_T su_msg_t *
#define NTA_AGENT_MAGIC_T struct nua_s
#define NTA_LEG_MAGIC_T struct nua_handle_s
#define NTA_OUTGOING_MAGIC_T struct nua_client_request
#include <sofia-sip/sip.h>
#include <sofia-sip/sip_header.h>
#include <sofia-sip/sip_status.h>
#include <sofia-sip/sip_util.h>
#include <sofia-sip/tport_tag.h>
#include <sofia-sip/nta.h>
#include <sofia-sip/nta_tport.h>
#include <sofia-sip/auth_client.h>
#include <sofia-sip/soa.h>
#include "sofia-sip/nua.h"
#include "sofia-sip/nua_tag.h"
#include "nua_stack.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stdio.h>
#include <assert.h>
/* ========================================================================
*
* Protocol stack side
*
* ======================================================================== */
/* ---------------------------------------------------------------------- */
/* Internal types */
/** @internal Linked stack frames from nua event callback */
struct nua_event_frame_s {
nua_event_frame_t *nf_next;
nua_saved_event_t nf_saved[1];
};
static void nua_event_deinit(nua_ee_data_t *ee);
static void nua_application_event(nua_t *, su_msg_r, nua_ee_data_t *ee);
static void nua_stack_signal(nua_t *nua, su_msg_r, nua_ee_data_t *ee);
nua_handle_t *nh_create(nua_t *nua, tag_type_t t, tag_value_t v, ...);
static void nh_append(nua_t *nua, nua_handle_t *nh);
static void nh_remove(nua_t *nua, nua_handle_t *nh);
static void nua_stack_timer(nua_t *nua, su_timer_t *t, su_timer_arg_t *a);
/* ---------------------------------------------------------------------- */
/* Constant data */
/**@internal Default internal error. */
char const nua_internal_error[] = "Internal NUA Error";
char const nua_application_sdp[] = "application/sdp";
#define NUA_STACK_TIMER_INTERVAL (1000)
/* ----------------------------------------------------------------------
* Initialization & deinitialization
*/
int nua_stack_init(su_root_t *root, nua_t *nua)
{
su_home_t *home;
nua_handle_t *dnh;
static int initialized_logs = 0;
enter;
if (!initialized_logs) {
extern su_log_t tport_log[];
extern su_log_t nta_log[];
extern su_log_t nea_log[];
extern su_log_t iptsec_log[];
su_log_init(tport_log);
su_log_init(nta_log);
su_log_init(nea_log);
su_log_init(iptsec_log);
initialized_logs = 1;
}
nua->nua_root = root;
nua->nua_timer = su_timer_create(su_root_task(root),
NUA_STACK_TIMER_INTERVAL);
if (!nua->nua_timer)
return -1;
home = nua->nua_home;
nua->nua_handles_tail = &nua->nua_handles;
sip_from_init(nua->nua_from);
dnh = su_home_clone(nua->nua_home, sizeof (*dnh) + sizeof(*dnh->nh_prefs));
if (!dnh)
return -1;
dnh->nh_prefs = (void *)(dnh + 1);
dnh->nh_valid = nua_valid_handle_cookie;
dnh->nh_nua = nua;
nua_handle_ref(dnh); dnh->nh_ref_by_stack = 1;
nua_handle_ref(dnh); dnh->nh_ref_by_user = 1;
nh_append(nua, dnh);
dnh->nh_identity = dnh;
dnh->nh_ds->ds_local = nua->nua_from;
dnh->nh_ds->ds_remote = nua->nua_from;
if (nua_stack_set_defaults(dnh, dnh->nh_prefs) < 0)
return -1;
if (nua_stack_set_params(nua, dnh, nua_i_none, nua->nua_args) < 0)
return -1;
nua->nua_invite_accept = sip_accept_make(home, SDP_MIME_TYPE);
nua->nua_nta = nta_agent_create(root, NONE, NULL, NULL,
NTATAG_MERGE_482(1),
NTATAG_CLIENT_RPORT(1),
NTATAG_UA(1),
#if HAVE_SOFIA_SMIME
NTATAG_SMIME(nua->sm),
#endif
TPTAG_STUN_SERVER(1),
TAG_NEXT(nua->nua_args));
dnh->nh_ds->ds_leg = nta_leg_tcreate(nua->nua_nta,
nua_stack_process_request, dnh,
NTATAG_NO_DIALOG(1),
TAG_END());
if (nua->nua_nta == NULL ||
dnh->nh_ds->ds_leg == NULL ||
nta_agent_set_params(nua->nua_nta, NTATAG_UA(1), TAG_END()) < 0 ||
nua_stack_init_transport(nua, nua->nua_args) < 0) {
SU_DEBUG_1(("nua: initializing SIP stack failed\n"));
return -1;
}
if (nua_stack_set_from(nua, 1, nua->nua_args) < 0)
return -1;
if (nua->nua_prefs->ngp_detect_network_updates)
nua_stack_launch_network_change_detector(nua);
nua_stack_timer(nua, nua->nua_timer, NULL);
return 0;
}
void nua_stack_deinit(su_root_t *root, nua_t *nua)
{
enter;
su_timer_destroy(nua->nua_timer), nua->nua_timer = NULL;
nta_agent_destroy(nua->nua_nta), nua->nua_nta = NULL;
}
/* ----------------------------------------------------------------------
* Sending events to client application
*/
static void nua_stack_shutdown(nua_t *);
void
nua_stack_authenticate(nua_t *, nua_handle_t *, nua_event_t, tagi_t const *),
nua_stack_respond(nua_t *, nua_handle_t *, int , char const *, tagi_t const *),
nua_stack_destroy_handle(nua_t *, nua_handle_t *, tagi_t const *);
/* Notifier */
void
nua_stack_authorize(nua_t *, nua_handle_t *, nua_event_t, tagi_t const *),
nua_stack_notifier(nua_t *, nua_handle_t *, nua_event_t, tagi_t const *),
nua_stack_terminate(nua_t *, nua_handle_t *, nua_event_t, tagi_t const *);
int nh_notifier_shutdown(nua_handle_t *nh, nea_event_t *ev,
tag_type_t t, tag_value_t v, ...);
int nua_stack_tevent(nua_t *nua, nua_handle_t *nh, msg_t *msg,
nua_event_t event, int status, char const *phrase,
tag_type_t tag, tag_value_t value, ...)
{
ta_list ta;
int retval;
ta_start(ta, tag, value);
retval = nua_stack_event(nua, nh, msg, event, status, phrase, ta_args(ta));
ta_end(ta);
return retval;
}
/** @internal Send an event to the application. */
int nua_stack_event(nua_t *nua, nua_handle_t *nh, msg_t *msg,
nua_event_t event, int status, char const *phrase,
tagi_t const *tags)
{
su_msg_r sumsg = SU_MSG_R_INIT;
size_t e_len, len, xtra, p_len;
if (event == nua_r_ack || event == nua_i_none)
return event;
if (nh == nua->nua_dhandle)
nh = NULL;
if (nua_log->log_level >= 5) {
char const *name = nua_event_name(event) + 4;
char const *p = phrase ? phrase : "";
if (status == 0)
SU_DEBUG_5(("nua(%p): event %s %s\n", (void *)nh, name, p));
else
SU_DEBUG_5(("nua(%p): event %s %u %s\n", (void *)nh, name, status, p));
}
if (event == nua_r_destroy) {
if (msg)
msg_destroy(msg);
if (status >= 200) {
nh_destroy(nua, nh);
}
return event;
}
if ((event > nua_r_authenticate && event <= nua_r_ack)
|| event < nua_i_error
|| (nh && !nh->nh_valid)
|| (nua->nua_shutdown && event != nua_r_shutdown &&
!nua->nua_prefs->ngp_shutdown_events)) {
if (msg)
msg_destroy(msg);
return event;
}
if (tags) {
e_len = offsetof(nua_ee_data_t, ee_data[0].e_tags);
len = tl_len(tags);
xtra = tl_xtra(tags, len);
}
else {
e_len = sizeof(nua_ee_data_t), len = 0, xtra = 0;
}
p_len = phrase ? strlen(phrase) + 1 : 1;
if (su_msg_new(sumsg, e_len + len + xtra + p_len) == 0) {
nua_ee_data_t *ee = su_msg_data(sumsg);
nua_event_data_t *e = ee->ee_data;
void *p;
if (tags) {
tagi_t *t = e->e_tags, *t_end = (tagi_t *)((char *)t + len);
void *b = t_end, *end = (char *)b + xtra;
t = tl_dup(t, tags, &b); p = b;
assert(t == t_end); assert(b == end); (void)end;
}
else
p = e + 1;
ee->ee_nua = nua_stack_ref(nua);
e->e_event = event;
e->e_nh = nh ? nua_handle_ref(nh) : NULL;
e->e_status = status;
e->e_phrase = strcpy(p, phrase ? phrase : "");
if (msg)
e->e_msg = msg, su_home_threadsafe(msg_home(msg));
su_msg_deinitializer(sumsg, nua_event_deinit);
su_msg_send_to(sumsg, nua->nua_client, nua_application_event);
}
return event;
}
static
void nua_event_deinit(nua_ee_data_t *ee)
{
nua_t *nua = ee->ee_nua;
nua_event_data_t *e = ee->ee_data;
nua_handle_t *nh = e->e_nh;
if (e->e_msg)
msg_destroy(e->e_msg), e->e_msg = NULL;
if (nh)
nua_handle_unref(nh), e->e_nh = NULL;
if (nua)
nua_stack_unref(nua), ee->ee_nua = NULL;
}
/*# Receive event from protocol machine and hand it over to application */
static
void nua_application_event(nua_t *dummy, su_msg_r sumsg, nua_ee_data_t *ee)
{
nua_t *nua = ee->ee_nua;
nua_event_data_t *e = ee->ee_data;
nua_handle_t *nh = e->e_nh;
enter;
ee->ee_nua = NULL;
e->e_nh = NULL;
if (nh == NULL) {
/* Xyzzy */
}
else if (nh->nh_valid) {
if (!nh->nh_ref_by_user) {
/* Application must now call nua_handle_destroy() */
nh->nh_ref_by_user = 1;
nua_handle_ref(nh);
}
}
else if (!nh->nh_valid) { /* Handle has been destroyed */
if (nua_log->log_level >= 7) {
char const *name = nua_event_name((enum nua_event_e)e->e_event) + 4;
SU_DEBUG_7(("nua(%p): event %s dropped\n", (void *)nh, name));
}
nua_handle_unref(nh);
nua_stack_unref(nua);
return;
}
if (e->e_event == nua_r_shutdown && e->e_status >= 200)
nua->nua_shutdown_final = 1;
if (nua->nua_callback) {
nua_event_frame_t frame[1];
su_msg_save(frame->nf_saved, sumsg);
frame->nf_next = nua->nua_current, nua->nua_current = frame;
nua->nua_callback((enum nua_event_e)e->e_event, e->e_status, e->e_phrase,
nua, nua->nua_magic,
nh, nh ? nh->nh_magic : NULL,
e->e_msg ? sip_object(e->e_msg) : NULL,
e->e_tags);
su_msg_destroy(frame->nf_saved);
nua->nua_current = frame->nf_next;
}
nua_handle_unref(nh);
nua_stack_unref(nua);
}
/** Get current request message. @NEW_1_12_4.
*
* @note A response message is returned when processing response message.
*
* @sa #nua_event_e, nua_respond(), NUTAG_WITH_CURRENT()
*/
msg_t *nua_current_request(nua_t const *nua)
{
if (nua && nua->nua_current && su_msg_is_non_null(nua->nua_current->nf_saved))
return su_msg_data(nua->nua_current->nf_saved)->ee_data->e_msg;
return NULL;
}
/** Get request message from saved nua event. @NEW_1_12_4.
*
* @sa nua_save_event(), nua_respond(), NUTAG_WITH_SAVED(),
*/
msg_t *nua_saved_event_request(nua_saved_event_t const *saved)
{
return saved && saved[0] ? su_msg_data(saved)->ee_data->e_msg : NULL;
}
/** Save nua event and its arguments.
*
* @sa #nua_event_e, nua_event_data() nua_saved_event_request(), nua_destroy_event()
*/
int nua_save_event(nua_t *nua, nua_saved_event_t return_saved[1])
{
if (return_saved) {
if (nua && nua->nua_current) {
su_msg_save(return_saved, nua->nua_current->nf_saved);
return su_msg_is_non_null(return_saved);
}
else
*return_saved = NULL;
}
return 0;
}
/* ---------------------------------------------------------------------- */
/** @internal
* Post signal to stack itself
*/
void nua_stack_post_signal(nua_handle_t *nh, nua_event_t event,
tag_type_t tag, tag_value_t value, ...)
{
ta_list ta;
ta_start(ta, tag, value);
nua_signal((nh)->nh_nua, nh, NULL, event, 0, NULL, ta_tags(ta));
ta_end(ta);
}
/*# Send a request to the protocol thread */
int nua_signal(nua_t *nua, nua_handle_t *nh, msg_t *msg,
nua_event_t event,
int status, char const *phrase,
tag_type_t tag, tag_value_t value, ...)
{
su_msg_r sumsg = SU_MSG_R_INIT;
size_t len, xtra, ee_len, l_len = 0, l_xtra = 0;
ta_list ta;
int retval = -1;
if (nua == NULL)
return -1;
if (nua->nua_shutdown_started && event != nua_r_shutdown)
return -1;
ta_start(ta, tag, value);
ee_len = offsetof(nua_ee_data_t, ee_data[0].e_tags);
len = tl_len(ta_args(ta));
xtra = tl_xtra(ta_args(ta), len);
if (su_msg_new(sumsg, ee_len + len + l_len + xtra + l_xtra) == 0) {
nua_ee_data_t *ee = su_msg_data(sumsg);
nua_event_data_t *e = ee->ee_data;
tagi_t *t = e->e_tags;
void *b = (char *)t + len + l_len;
tagi_t *tend = (tagi_t *)b;
char *bend = (char *)b + xtra + l_xtra;
t = tl_dup(t, ta_args(ta), &b);
assert(tend == t); (void)tend; assert(b == bend); (void)bend;
e->e_always = event == nua_r_destroy || event == nua_r_shutdown;
e->e_event = event;
e->e_nh = nh ? nua_handle_ref(nh) : NULL;
e->e_status = status;
e->e_phrase = phrase;
su_msg_deinitializer(sumsg, nua_event_deinit);
retval = su_msg_send_to(sumsg, nua->nua_server, nua_stack_signal);
if (retval == 0){
SU_DEBUG_7(("nua(%p): %s signal %s\n", (void *)nh,
"sent", nua_event_name(event) + 4));
}
else {
SU_DEBUG_0(("nua(%p): %s signal %s\n", (void *)nh,
"FAILED TO SEND", nua_event_name(event) + 4));
}
}
ta_end(ta);
return retval;
}
/* ----------------------------------------------------------------------
* Receiving events from client
*/
static
void nua_stack_signal(nua_t *nua, su_msg_r msg, nua_ee_data_t *ee)
{
nua_event_data_t *e = ee->ee_data;
nua_handle_t *nh = e->e_nh;
tagi_t *tags = e->e_tags;
nua_event_t event;
int error = 0;
if (nh) {
if (!nh->nh_prev)
nh_append(nua, nh);
if (!nh->nh_ref_by_stack) {
/* Mark handle as used by stack */
nh->nh_ref_by_stack = 1;
nua_handle_ref(nh);
}
}
if (nua_log->log_level >= 5) {
char const *name = nua_event_name((enum nua_event_e)e->e_event);
if (e->e_status == 0)
SU_DEBUG_5(("nua(%p): %s signal %s\n", (void *)nh, "recv", name + 4));
else
SU_DEBUG_5(("nua(%p): recv signal %s %u %s\n",
(void *)nh, name + 4,
e->e_status, e->e_phrase ? e->e_phrase : ""));
}
su_msg_save(nua->nua_signal, msg);
event = (enum nua_event_e)e->e_event;
if (nua->nua_shutdown && !e->e_always) {
/* Shutting down */
nua_stack_event(nua, nh, NULL, event,
901, "Stack is going down",
NULL);
}
else switch (event) {
case nua_r_get_params:
nua_stack_get_params(nua, nh ? nh : nua->nua_dhandle, event, tags);
break;
case nua_r_set_params:
nua_stack_set_params(nua, nh ? nh : nua->nua_dhandle, event, tags);
break;
case nua_r_shutdown:
nua_stack_shutdown(nua);
break;
case nua_r_register:
case nua_r_unregister:
nua_stack_register(nua, nh, event, tags);
break;
case nua_r_invite:
error = nua_stack_invite(nua, nh, event, tags);
break;
case nua_r_cancel:
error = nua_stack_cancel(nua, nh, event, tags);
break;
case nua_r_bye:
error = nua_stack_bye(nua, nh, event, tags);
break;
case nua_r_options:
error = nua_stack_options(nua, nh, event, tags);
break;
case nua_r_refer:
error = nua_stack_refer(nua, nh, event, tags);
break;
case nua_r_publish:
case nua_r_unpublish:
error = nua_stack_publish(nua, nh, event, tags);
break;
case nua_r_info:
error = nua_stack_info(nua, nh, event, tags);
break;
case nua_r_prack:
error = nua_stack_prack(nua, nh, event, tags);
break;
case nua_r_update:
error = nua_stack_update(nua, nh, event, tags);
break;
case nua_r_message:
error = nua_stack_message(nua, nh, event, tags);
break;
case nua_r_subscribe:
case nua_r_unsubscribe:
error = nua_stack_subscribe(nua, nh, event, tags);
break;
case nua_r_notify:
error = nua_stack_notify(nua, nh, event, tags);
break;
case nua_r_notifier:
nua_stack_notifier(nua, nh, event, tags);
break;
case nua_r_terminate:
nua_stack_terminate(nua, nh, event, tags);
break;
case nua_r_method:
error = nua_stack_method(nua, nh, event, tags);
break;
case nua_r_authenticate:
nua_stack_authenticate(nua, nh, event, tags);
break;
case nua_r_authorize:
nua_stack_authorize(nua, nh, event, tags);
break;
case nua_r_ack:
error = nua_stack_ack(nua, nh, event, tags);
break;
case nua_r_respond:
nua_stack_respond(nua, nh, e->e_status, e->e_phrase, tags);
break;
case nua_r_destroy:
nua_stack_destroy_handle(nua, nh, tags);
su_msg_destroy(nua->nua_signal);
return;
default:
break;
}
if (error < 0) {
nua_stack_event(nh->nh_nua, nh, NULL, event,
NUA_ERROR_AT(__FILE__, __LINE__), NULL);
}
su_msg_destroy(nua->nua_signal);
}
/* ====================================================================== */
/* Signal and event handling */
/** Get event data.
*
* @sa #nua_event_e, nua_event_save(), nua_saved_event_request(), nua_destroy_event().
*/
nua_event_data_t const *nua_event_data(nua_saved_event_t const saved[1])
{
return saved && saved[0] ? su_msg_data(saved)->ee_data : NULL;
}
/** Destroy saved event.
*
* @sa #nua_event_e, nua_event_save(), nua_event_data(), nua_saved_event_request().
*/
void nua_destroy_event(nua_saved_event_t saved[1])
{
if (saved) su_msg_destroy(saved);
}
/** @internal Move signal. */
void nua_move_signal(nua_saved_signal_t a[1], nua_saved_signal_t b[1])
{
su_msg_save(a, b);
}
void nua_destroy_signal(nua_saved_signal_t saved[1])
{
if (saved) su_msg_destroy(saved);
}
nua_signal_data_t const *nua_signal_data(nua_saved_signal_t const saved[1])
{
return nua_event_data(saved);
}
/* ====================================================================== */
static int nh_call_pending(nua_handle_t *nh, sip_time_t time);
/**@internal
* Timer routine.
*
* Go through all active handles and execute pending tasks
*/
void nua_stack_timer(nua_t *nua, su_timer_t *t, su_timer_arg_t *a)
{
nua_handle_t *nh, *nh_next;
sip_time_t now = sip_now();
su_root_t *root = su_timer_root(t);
su_timer_set(t, nua_stack_timer, a);
if (nua->nua_shutdown) {
nua_stack_shutdown(nua);
return;
}
for (nh = nua->nua_handles; nh; nh = nh_next) {
nh_next = nh->nh_next;
nh_call_pending(nh, now);
su_root_yield(root); /* Handle received packets */
}
}
static
int nh_call_pending(nua_handle_t *nh, sip_time_t now)
{
nua_dialog_state_t *ds = nh->nh_ds;
nua_dialog_usage_t *du;
sip_time_t next = now + NUA_STACK_TIMER_INTERVAL / 1000;
for (du = ds->ds_usage; du; du = du->du_next) {
if (now == 0)
break;
if (du->du_refresh && du->du_refresh < next)
break;
}
if (du == NULL)
return 0;
nua_handle_ref(nh);
while (du) {
nua_dialog_usage_t *du_next = du->du_next;
nua_dialog_usage_refresh(nh, ds, du, now);
if (du_next == NULL)
break;
for (du = nh->nh_ds->ds_usage; du; du = du->du_next)
if (du == du_next)
break;
for (; du; du = du->du_next) {
if (now == 0)
break;
if (du->du_refresh && du->du_refresh < next)
break;
}
}
nua_handle_unref(nh);
return 1;
}
/* ====================================================================== */
/**Shutdown a @nua stack.
*
* When the @nua stack is shutdown, ongoing calls are released,
* registrations unregistered, publications un-PUBLISHed and subscriptions
* terminated. If the stack cannot terminate everything within 30 seconds,
* it sends the #nua_r_shutdown event with status 500.
*
* @param nua Pointer to @nua stack object
*
* @return
* nothing
*
* @par Related tags:
* none
*
* @par Events:
* #nua_r_shutdown
*
* @sa #nua_r_shutdown, nua_destroy(), nua_create(), nua_bye(),
* nua_unregister(), nua_unpublish(), nua_unsubscribe(), nua_notify(),
* nua_handle_destroy(), nua_handle_unref()
*/
/** @NUA_EVENT nua_r_shutdown
*
* Answer to nua_shutdown().
*
* Status codes
* - 100 shutdown started
* - 101 shutdown in progress (sent when shutdown has been progressed)
* - 200 shutdown was successful
* - 500 shutdown timeout after 30 sec
*
* @param status shutdown status code
* @param nh NULL
* @param hmagic NULL
* @param sip NULL
* @param tags empty
*
* @sa nua_shutdown(), nua_destroy()
*
* @END_NUA_EVENT
*/
/** @internal Shut down stack. */
void nua_stack_shutdown(nua_t *nua)
{
nua_handle_t *nh, *nh_next;
int busy = 0;
sip_time_t now = sip_now();
int status;
char const *phrase;
enter;
if (!nua->nua_shutdown)
nua->nua_shutdown = now;
for (nh = nua->nua_handles; nh; nh = nh_next) {
nua_dialog_state_t *ds = nh->nh_ds;
nh_next = nh->nh_next;
busy += nua_dialog_repeat_shutdown(nh, ds);
if (nh->nh_soa) {
soa_destroy(nh->nh_soa), nh->nh_soa = NULL;
}
if (nua_client_request_pending(ds->ds_cr))
busy++;
if (nh_notifier_shutdown(nh, NULL, NEATAG_REASON("noresource"), TAG_END()))
busy++;
}
if (!busy)
SET_STATUS(200, "Shutdown successful");
else if (now == nua->nua_shutdown)
SET_STATUS(100, "Shutdown started");
else if (now - nua->nua_shutdown < 30)
SET_STATUS(101, "Shutdown in progress");
else
SET_STATUS(500, "Shutdown timeout");
if (status >= 200) {
for (nh = nua->nua_handles; nh; nh = nh_next) {
nh_next = nh->nh_next;
while (nh->nh_ds && nh->nh_ds->ds_usage) {
nua_dialog_usage_remove(nh, nh->nh_ds, nh->nh_ds->ds_usage, NULL, NULL);
}
}
su_timer_destroy(nua->nua_timer), nua->nua_timer = NULL;
nta_agent_destroy(nua->nua_nta), nua->nua_nta = NULL;
}
nua_stack_event(nua, NULL, NULL, nua_r_shutdown, status, phrase, NULL);
}
/* ---------------------------------------------------------------------- */
/** @internal Create a handle */
nua_handle_t *nh_create(nua_t *nua, tag_type_t tag, tag_value_t value, ...)
{
ta_list ta;
nua_handle_t *nh;
enter;
ta_start(ta, tag, value);
nh = nh_create_handle(nua, NULL, ta_args(ta));
ta_end(ta);
if (nh) {
nh->nh_ref_by_stack = 1;
nh_append(nua, nh);
}
return nh;
}
/** @internal Append a handle to the list of handles */
void nh_append(nua_t *nua, nua_handle_t *nh)
{
nh->nh_next = NULL;
nh->nh_prev = nua->nua_handles_tail;
*nua->nua_handles_tail = nh;
nua->nua_handles_tail = &nh->nh_next;
}
nua_handle_t *nh_validate(nua_t *nua, nua_handle_t *maybe)
{
nua_handle_t *nh;
if (maybe)
for (nh = nua->nua_handles; nh; nh = nh->nh_next)
if (nh == maybe)
return nh;
return NULL;
}
void nua_stack_destroy_handle(nua_t *nua, nua_handle_t *nh, tagi_t const *tags)
{
if (nh->nh_notifier)
nua_stack_terminate(nua, nh, (enum nua_event_e)0, NULL);
nua_dialog_shutdown(nh, nh->nh_ds);
if (nh->nh_ref_by_user) {
nh->nh_ref_by_user = 0;
nua_handle_unref(nh);
}
nh_destroy(nua, nh);
}
#define nh_is_inserted(nh) ((nh)->nh_prev != NULL)
/** @internal Remove a handle from list of handles */
static
void nh_remove(nua_t *nua, nua_handle_t *nh)
{
assert(nh_is_inserted(nh)); assert(*nh->nh_prev == nh);
if (nh->nh_next)
nh->nh_next->nh_prev = nh->nh_prev;
else
nua->nua_handles_tail = nh->nh_prev;
*nh->nh_prev = nh->nh_next;
nh->nh_prev = NULL;
nh->nh_next = NULL;
}
void nh_destroy(nua_t *nua, nua_handle_t *nh)
{
assert(nh); assert(nh != nua->nua_dhandle);
if (nh->nh_notifier)
nea_server_destroy(nh->nh_notifier), nh->nh_notifier = NULL;
while (nh->nh_ds->ds_cr)
nua_client_request_complete(nh->nh_ds->ds_cr);
while (nh->nh_ds->ds_sr)
nua_server_request_destroy(nh->nh_ds->ds_sr);
nua_dialog_deinit(nh, nh->nh_ds);
if (nh->nh_soa)
soa_destroy(nh->nh_soa), nh->nh_soa = NULL;
if (nh_is_inserted(nh))
nh_remove(nua, nh);
nua_handle_unref(nh); /* Remove stack reference */
}
/* ======================================================================== */
/** @internal Create a handle for processing incoming request */
nua_handle_t *nua_stack_incoming_handle(nua_t *nua,
nta_incoming_t *irq,
sip_t const *sip,
int create_dialog)
{
nua_handle_t *nh;
url_t const *url;
sip_to_t to[1];
sip_from_t from[1];
assert(sip && sip->sip_from && sip->sip_to);
if (sip->sip_contact)
url = sip->sip_contact->m_url;
else
url = sip->sip_from->a_url;
/* Strip away parameters */
sip_from_init(from)->a_display = sip->sip_to->a_display;
*from->a_url = *sip->sip_to->a_url;
sip_to_init(to)->a_display = sip->sip_from->a_display;
*to->a_url = *sip->sip_from->a_url;
nh = nh_create(nua,
NUTAG_URL((url_string_t *)url), /* Remote target */
SIPTAG_TO(to), /* Local AoR */
SIPTAG_FROM(from), /* Remote AoR */
TAG_END());
if (nh && nua_stack_init_handle(nua, nh, NULL) < 0)
nh_destroy(nua, nh), nh = NULL;
if (nh && create_dialog) {
struct nua_dialog_state *ds = nh->nh_ds;
nua_dialog_store_peer_info(nh, ds, sip);
ds->ds_leg = nta_leg_tcreate(nua->nua_nta, nua_stack_process_request, nh,
SIPTAG_CALL_ID(sip->sip_call_id),
SIPTAG_FROM(sip->sip_to),
SIPTAG_TO(sip->sip_from),
NTATAG_REMOTE_CSEQ(sip->sip_cseq->cs_seq),
TAG_END());
if (!ds->ds_leg || !nta_leg_tag(ds->ds_leg, nta_incoming_tag(irq, NULL)))
nh_destroy(nua, nh), nh = NULL;
}
if (nh)
nua_dialog_uas_route(nh, nh->nh_ds, sip, 1);
return nh;
}
/** Set flags and special event on handle.
*
* @retval 0 when successful
* @retval -1 upon an error
*/
int nua_stack_set_handle_special(nua_handle_t *nh,
enum nh_kind kind,
nua_event_t special)
{
if (nh == NULL)
return -1;
if (special && nh->nh_special && nh->nh_special != special)
return -1;
if (!nh_is_special(nh) && !nh->nh_has_invite) {
switch (kind) {
case nh_has_invite: nh->nh_has_invite = 1; break;
case nh_has_subscribe: nh->nh_has_subscribe = 1; break;
case nh_has_notify: nh->nh_has_notify = 1; break;
case nh_has_register: nh->nh_has_register = 1; break;
case nh_has_nothing:
default:
break;
}
if (special)
nh->nh_special = special;
}
return 0;
}
sip_replaces_t *nua_stack_handle_make_replaces(nua_handle_t *nh,
su_home_t *home,
int early_only)
{
if (nh && nh->nh_ds && nh->nh_ds->ds_leg)
return nta_leg_make_replaces(nh->nh_ds->ds_leg, home, early_only);
else
return NULL;
}
nua_handle_t *nua_stack_handle_by_replaces(nua_t *nua,
sip_replaces_t const *r)
{
if (nua) {
nta_leg_t *leg = nta_leg_by_replaces(nua->nua_nta, r);
if (leg)
return nta_leg_magic(leg, nua_stack_process_request);
}
return NULL;
}
nua_handle_t *nua_stack_handle_by_call_id(nua_t *nua, const char *call_id)
{
if (nua) {
nta_leg_t *leg = nta_leg_by_call_id(nua->nua_nta, call_id);
if (leg)
return nta_leg_magic(leg, nua_stack_process_request);
}
return NULL;
}
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