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/* $Id$ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pjsip/sip_util.h>
#include <pjsip/sip_transport.h>
#include <pjsip/sip_msg.h>
#include <pjsip/sip_endpoint.h>
#include <pjsip/sip_event.h>
#include <pjsip/sip_transaction.h>
#include <pjsip/sip_module.h>
#include <pjsip/sip_errno.h>
#include <pj/log.h>
#include <pj/string.h>
#include <pj/guid.h>
#include <pj/pool.h>
#include <pj/except.h>
#include <pj/rand.h>
#include <pj/assert.h>
#include <pj/errno.h>
#define THIS_FILE "endpoint"
static const char *event_str[] =
{
"UNIDENTIFIED",
"TIMER",
"TX_MSG",
"RX_MSG",
"TRANSPORT_ERROR",
"TSX_STATE",
"USER",
};
static pj_str_t str_TEXT = { "text", 4},
str_PLAIN = { "plain", 5 };
/* Add URI to target-set */
PJ_DEF(pj_status_t) pjsip_target_set_add_uri( pjsip_target_set *tset,
pj_pool_t *pool,
const pjsip_uri *uri,
int q1000)
{
pjsip_target *t, *pos = NULL;
PJ_ASSERT_RETURN(tset && pool && uri, PJ_EINVAL);
/* Set q-value to 1 if it is not set */
if (q1000 <= 0)
q1000 = 1000;
/* Scan all the elements to see for duplicates, and at the same time
* get the position where the new element should be inserted to
* based on the q-value.
*/
t = tset->head.next;
while (t != &tset->head) {
if (pjsip_uri_cmp(PJSIP_URI_IN_REQ_URI, t->uri, uri)==PJ_SUCCESS)
return PJ_EEXISTS;
if (pos==NULL && t->q1000 < q1000)
pos = t;
t = t->next;
}
/* Create new element */
t = PJ_POOL_ZALLOC_T(pool, pjsip_target);
t->uri = (pjsip_uri*)pjsip_uri_clone(pool, uri);
t->q1000 = q1000;
/* Insert */
if (pos == NULL)
pj_list_push_back(&tset->head, t);
else
pj_list_insert_before(pos, t);
/* Set current target if this is the first URI */
if (tset->current == NULL)
tset->current = t;
return PJ_SUCCESS;
}
/* Add URI's in the Contact header in the message to target-set */
PJ_DEF(pj_status_t) pjsip_target_set_add_from_msg( pjsip_target_set *tset,
pj_pool_t *pool,
const pjsip_msg *msg)
{
const pjsip_hdr *hdr;
unsigned added = 0;
PJ_ASSERT_RETURN(tset && pool && msg, PJ_EINVAL);
/* Scan for Contact headers and add the URI */
hdr = msg->hdr.next;
while (hdr != &msg->hdr) {
if (hdr->type == PJSIP_H_CONTACT) {
const pjsip_contact_hdr *cn_hdr = (const pjsip_contact_hdr*)hdr;
if (!cn_hdr->star) {
pj_status_t rc;
rc = pjsip_target_set_add_uri(tset, pool, cn_hdr->uri,
cn_hdr->q1000);
if (rc == PJ_SUCCESS)
++added;
}
}
hdr = hdr->next;
}
return added ? PJ_SUCCESS : PJ_EEXISTS;
}
/* Get next target, if any */
PJ_DEF(pjsip_target*) pjsip_target_set_get_next(const pjsip_target_set *tset)
{
const pjsip_target *t, *next = NULL;
t = tset->head.next;
while (t != &tset->head) {
if (PJSIP_IS_STATUS_IN_CLASS(t->code, 200)) {
/* No more target since one target has been successful */
return NULL;
}
if (PJSIP_IS_STATUS_IN_CLASS(t->code, 600)) {
/* No more target since one target returned global error */
return NULL;
}
if (t->code==0 && next==NULL) {
/* This would be the next target as long as we don't find
* targets with 2xx or 6xx status after this.
*/
next = t;
}
t = t->next;
}
return (pjsip_target*)next;
}
/* Set current target */
PJ_DEF(pj_status_t) pjsip_target_set_set_current( pjsip_target_set *tset,
pjsip_target *target)
{
PJ_ASSERT_RETURN(tset && target, PJ_EINVAL);
PJ_ASSERT_RETURN(pj_list_find_node(tset, target) != NULL, PJ_ENOTFOUND);
tset->current = target;
return PJ_SUCCESS;
}
/* Assign status to a target */
PJ_DEF(pj_status_t) pjsip_target_assign_status( pjsip_target *target,
pj_pool_t *pool,
int status_code,
const pj_str_t *reason)
{
PJ_ASSERT_RETURN(target && pool && status_code && reason, PJ_EINVAL);
target->code = (pjsip_status_code)status_code;
pj_strdup(pool, &target->reason, reason);
return PJ_SUCCESS;
}
/*
* Initialize transmit data (msg) with the headers and optional body.
* This will just put the headers in the message as it is. Be carefull
* when calling this function because once a header is put in a message,
* it CAN NOT be put in other message until the first message is deleted,
* because the way the header is put in the list.
* That's why the session will shallow_clone it's headers before calling
* this function.
*/
static void init_request_throw( pjsip_endpoint *endpt,
pjsip_tx_data *tdata,
pjsip_method *method,
pjsip_uri *param_target,
pjsip_from_hdr *param_from,
pjsip_to_hdr *param_to,
pjsip_contact_hdr *param_contact,
pjsip_cid_hdr *param_call_id,
pjsip_cseq_hdr *param_cseq,
const pj_str_t *param_text)
{
pjsip_msg *msg;
pjsip_msg_body *body;
pjsip_via_hdr *via;
const pjsip_hdr *endpt_hdr;
/* Create the message. */
msg = tdata->msg = pjsip_msg_create(tdata->pool, PJSIP_REQUEST_MSG);
/* Init request URI. */
pj_memcpy(&msg->line.req.method, method, sizeof(*method));
msg->line.req.uri = param_target;
/* Add additional request headers from endpoint. */
endpt_hdr = pjsip_endpt_get_request_headers(endpt)->next;
while (endpt_hdr != pjsip_endpt_get_request_headers(endpt)) {
pjsip_hdr *hdr = (pjsip_hdr*)
pjsip_hdr_shallow_clone(tdata->pool, endpt_hdr);
pjsip_msg_add_hdr( tdata->msg, hdr );
endpt_hdr = endpt_hdr->next;
}
/* Add From header. */
if (param_from->tag.slen == 0)
pj_create_unique_string(tdata->pool, &param_from->tag);
pjsip_msg_add_hdr(msg, (pjsip_hdr*)param_from);
/* Add To header. */
pjsip_msg_add_hdr(msg, (pjsip_hdr*)param_to);
/* Add Contact header. */
if (param_contact) {
pjsip_msg_add_hdr(msg, (pjsip_hdr*)param_contact);
}
/* Add Call-ID header. */
pjsip_msg_add_hdr(msg, (pjsip_hdr*)param_call_id);
/* Add CSeq header. */
pjsip_msg_add_hdr(msg, (pjsip_hdr*)param_cseq);
/* Add a blank Via header in the front of the message. */
via = pjsip_via_hdr_create(tdata->pool);
via->rport_param = pjsip_cfg()->endpt.disable_rport ? -1 : 0;
pjsip_msg_insert_first_hdr(msg, (pjsip_hdr*)via);
/* Add header params as request headers */
if (PJSIP_URI_SCHEME_IS_SIP(param_target) ||
PJSIP_URI_SCHEME_IS_SIPS(param_target))
{
pjsip_sip_uri *uri = (pjsip_sip_uri*) pjsip_uri_get_uri(param_target);
pjsip_param *hparam;
hparam = uri->header_param.next;
while (hparam != &uri->header_param) {
pjsip_generic_string_hdr *hdr;
hdr = pjsip_generic_string_hdr_create(tdata->pool,
&hparam->name,
&hparam->value);
pjsip_msg_add_hdr(msg, (pjsip_hdr*)hdr);
hparam = hparam->next;
}
}
/* Create message body. */
if (param_text) {
body = PJ_POOL_ZALLOC_T(tdata->pool, pjsip_msg_body);
body->content_type.type = str_TEXT;
body->content_type.subtype = str_PLAIN;
body->data = pj_pool_alloc(tdata->pool, param_text->slen );
pj_memcpy(body->data, param_text->ptr, param_text->slen);
body->len = (unsigned)param_text->slen;
body->print_body = &pjsip_print_text_body;
msg->body = body;
}
PJ_LOG(5,(THIS_FILE, "%s created.",
pjsip_tx_data_get_info(tdata)));
}
/*
* Create arbitrary request.
*/
PJ_DEF(pj_status_t) pjsip_endpt_create_request( pjsip_endpoint *endpt,
const pjsip_method *method,
const pj_str_t *param_target,
const pj_str_t *param_from,
const pj_str_t *param_to,
const pj_str_t *param_contact,
const pj_str_t *param_call_id,
int param_cseq,
const pj_str_t *param_text,
pjsip_tx_data **p_tdata)
{
pjsip_uri *target;
pjsip_tx_data *tdata;
pjsip_from_hdr *from;
pjsip_to_hdr *to;
pjsip_contact_hdr *contact;
pjsip_cseq_hdr *cseq = NULL; /* = NULL, warning in VC6 */
pjsip_cid_hdr *call_id;
pj_str_t tmp;
pj_status_t status;
const pj_str_t STR_CONTACT = { "Contact", 7 };
PJ_USE_EXCEPTION;
status = pjsip_endpt_create_tdata(endpt, &tdata);
if (status != PJ_SUCCESS)
return status;
/* Init reference counter to 1. */
pjsip_tx_data_add_ref(tdata);
PJ_TRY {
/* Request target. */
pj_strdup_with_null(tdata->pool, &tmp, param_target);
target = pjsip_parse_uri( tdata->pool, tmp.ptr, tmp.slen, 0);
if (target == NULL) {
status = PJSIP_EINVALIDREQURI;
goto on_error;
}
/* From */
from = pjsip_from_hdr_create(tdata->pool);
pj_strdup_with_null(tdata->pool, &tmp, param_from);
from->uri = pjsip_parse_uri( tdata->pool, tmp.ptr, tmp.slen,
PJSIP_PARSE_URI_AS_NAMEADDR);
if (from->uri == NULL) {
status = PJSIP_EINVALIDHDR;
goto on_error;
}
pj_create_unique_string(tdata->pool, &from->tag);
/* To */
to = pjsip_to_hdr_create(tdata->pool);
pj_strdup_with_null(tdata->pool, &tmp, param_to);
to->uri = pjsip_parse_uri( tdata->pool, tmp.ptr, tmp.slen,
PJSIP_PARSE_URI_AS_NAMEADDR);
if (to->uri == NULL) {
status = PJSIP_EINVALIDHDR;
goto on_error;
}
/* Contact. */
if (param_contact) {
pj_strdup_with_null(tdata->pool, &tmp, param_contact);
contact = (pjsip_contact_hdr*)
pjsip_parse_hdr(tdata->pool, &STR_CONTACT, tmp.ptr,
tmp.slen, NULL);
if (contact == NULL) {
status = PJSIP_EINVALIDHDR;
goto on_error;
}
} else {
contact = NULL;
}
/* Call-ID */
call_id = pjsip_cid_hdr_create(tdata->pool);
if (param_call_id != NULL && param_call_id->slen)
pj_strdup(tdata->pool, &call_id->id, param_call_id);
else
pj_create_unique_string(tdata->pool, &call_id->id);
/* CSeq */
cseq = pjsip_cseq_hdr_create(tdata->pool);
if (param_cseq >= 0)
cseq->cseq = param_cseq;
else
cseq->cseq = pj_rand() & 0xFFFF;
/* Method */
pjsip_method_copy(tdata->pool, &cseq->method, method);
/* Create the request. */
init_request_throw( endpt, tdata, &cseq->method, target, from, to,
contact, call_id, cseq, param_text);
}
PJ_CATCH_ANY {
status = PJ_ENOMEM;
goto on_error;
}
PJ_END
*p_tdata = tdata;
return PJ_SUCCESS;
on_error:
pjsip_tx_data_dec_ref(tdata);
return status;
}
PJ_DEF(pj_status_t) pjsip_endpt_create_request_from_hdr( pjsip_endpoint *endpt,
const pjsip_method *method,
const pjsip_uri *param_target,
const pjsip_from_hdr *param_from,
const pjsip_to_hdr *param_to,
const pjsip_contact_hdr *param_contact,
const pjsip_cid_hdr *param_call_id,
int param_cseq,
const pj_str_t *param_text,
pjsip_tx_data **p_tdata)
{
pjsip_uri *target;
pjsip_tx_data *tdata;
pjsip_from_hdr *from;
pjsip_to_hdr *to;
pjsip_contact_hdr *contact;
pjsip_cid_hdr *call_id;
pjsip_cseq_hdr *cseq = NULL; /* The NULL because warning in VC6 */
pj_status_t status;
PJ_USE_EXCEPTION;
/* Check arguments. */
PJ_ASSERT_RETURN(endpt && method && param_target && param_from &&
param_to && p_tdata, PJ_EINVAL);
/* Create new transmit data. */
status = pjsip_endpt_create_tdata(endpt, &tdata);
if (status != PJ_SUCCESS)
return status;
/* Set initial reference counter to 1. */
pjsip_tx_data_add_ref(tdata);
PJ_TRY {
/* Duplicate target URI and headers. */
target = (pjsip_uri*) pjsip_uri_clone(tdata->pool, param_target);
from = (pjsip_from_hdr*) pjsip_hdr_clone(tdata->pool, param_from);
pjsip_fromto_hdr_set_from(from);
to = (pjsip_to_hdr*) pjsip_hdr_clone(tdata->pool, param_to);
pjsip_fromto_hdr_set_to(to);
if (param_contact) {
contact = (pjsip_contact_hdr*)
pjsip_hdr_clone(tdata->pool, param_contact);
} else {
contact = NULL;
}
call_id = pjsip_cid_hdr_create(tdata->pool);
if (param_call_id != NULL && param_call_id->id.slen)
pj_strdup(tdata->pool, &call_id->id, &param_call_id->id);
else
pj_create_unique_string(tdata->pool, &call_id->id);
cseq = pjsip_cseq_hdr_create(tdata->pool);
if (param_cseq >= 0)
cseq->cseq = param_cseq;
else
cseq->cseq = pj_rand() % 0xFFFF;
pjsip_method_copy(tdata->pool, &cseq->method, method);
/* Copy headers to the request. */
init_request_throw(endpt, tdata, &cseq->method, target, from, to,
contact, call_id, cseq, param_text);
}
PJ_CATCH_ANY {
status = PJ_ENOMEM;
goto on_error;
}
PJ_END;
*p_tdata = tdata;
return PJ_SUCCESS;
on_error:
pjsip_tx_data_dec_ref(tdata);
return status;
}
/*
* Construct a minimal response message for the received request.
*/
PJ_DEF(pj_status_t) pjsip_endpt_create_response( pjsip_endpoint *endpt,
const pjsip_rx_data *rdata,
int st_code,
const pj_str_t *st_text,
pjsip_tx_data **p_tdata)
{
pjsip_tx_data *tdata;
pjsip_msg *msg, *req_msg;
pjsip_hdr *hdr;
pjsip_to_hdr *to_hdr;
pjsip_via_hdr *top_via = NULL, *via;
pjsip_rr_hdr *rr;
pj_status_t status;
/* Check arguments. */
PJ_ASSERT_RETURN(endpt && rdata && p_tdata, PJ_EINVAL);
/* Check status code. */
PJ_ASSERT_RETURN(st_code >= 100 && st_code <= 699, PJ_EINVAL);
/* rdata must be a request message. */
req_msg = rdata->msg_info.msg;
pj_assert(req_msg->type == PJSIP_REQUEST_MSG);
/* Request MUST NOT be ACK request! */
PJ_ASSERT_RETURN(req_msg->line.req.method.id != PJSIP_ACK_METHOD,
PJ_EINVALIDOP);
/* Create a new transmit buffer. */
status = pjsip_endpt_create_tdata( endpt, &tdata);
if (status != PJ_SUCCESS)
return status;
/* Set initial reference count to 1. */
pjsip_tx_data_add_ref(tdata);
/* Create new response message. */
tdata->msg = msg = pjsip_msg_create(tdata->pool, PJSIP_RESPONSE_MSG);
/* Set status code and reason text. */
msg->line.status.code = st_code;
if (st_text)
pj_strdup(tdata->pool, &msg->line.status.reason, st_text);
else
msg->line.status.reason = *pjsip_get_status_text(st_code);
/* Set TX data attributes. */
tdata->rx_timestamp = rdata->pkt_info.timestamp;
/* Copy all the via headers, in order. */
via = rdata->msg_info.via;
while (via) {
pjsip_via_hdr *new_via;
new_via = (pjsip_via_hdr*)pjsip_hdr_clone(tdata->pool, via);
if (top_via == NULL)
top_via = new_via;
pjsip_msg_add_hdr( msg, (pjsip_hdr*)new_via);
via = via->next;
if (via != (void*)&req_msg->hdr)
via = (pjsip_via_hdr*)
pjsip_msg_find_hdr(req_msg, PJSIP_H_VIA, via);
else
break;
}
/* Copy all Record-Route headers, in order. */
rr = (pjsip_rr_hdr*)
pjsip_msg_find_hdr(req_msg, PJSIP_H_RECORD_ROUTE, NULL);
while (rr) {
pjsip_msg_add_hdr(msg, (pjsip_hdr*) pjsip_hdr_clone(tdata->pool, rr));
rr = rr->next;
if (rr != (void*)&req_msg->hdr)
rr = (pjsip_rr_hdr*) pjsip_msg_find_hdr(req_msg,
PJSIP_H_RECORD_ROUTE, rr);
else
break;
}
/* Copy Call-ID header. */
hdr = (pjsip_hdr*) pjsip_msg_find_hdr( req_msg, PJSIP_H_CALL_ID, NULL);
pjsip_msg_add_hdr(msg, (pjsip_hdr*) pjsip_hdr_clone(tdata->pool, hdr));
/* Copy From header. */
hdr = (pjsip_hdr*) pjsip_hdr_clone(tdata->pool, rdata->msg_info.from);
pjsip_msg_add_hdr( msg, hdr);
/* Copy To header. */
to_hdr = (pjsip_to_hdr*) pjsip_hdr_clone(tdata->pool, rdata->msg_info.to);
pjsip_msg_add_hdr( msg, (pjsip_hdr*)to_hdr);
/* Must add To tag in the response (Section 8.2.6.2), except if this is
* 100 (Trying) response. Same tag must be created for the same request
* (e.g. same tag in provisional and final response). The easiest way
* to do this is to derive the tag from Via branch parameter (or to
* use it directly).
*/
if (to_hdr->tag.slen==0 && st_code > 100 && top_via) {
to_hdr->tag = top_via->branch_param;
}
/* Copy CSeq header. */
hdr = (pjsip_hdr*) pjsip_hdr_clone(tdata->pool, rdata->msg_info.cseq);
pjsip_msg_add_hdr( msg, hdr);
/* All done. */
*p_tdata = tdata;
PJ_LOG(5,(THIS_FILE, "%s created", pjsip_tx_data_get_info(tdata)));
return PJ_SUCCESS;
}
/*
* Construct ACK for 3xx-6xx final response (according to chapter 17.1.1 of
* RFC3261). Note that the generation of ACK for 2xx response is different,
* and one must not use this function to generate such ACK.
*/
PJ_DEF(pj_status_t) pjsip_endpt_create_ack( pjsip_endpoint *endpt,
const pjsip_tx_data *tdata,
const pjsip_rx_data *rdata,
pjsip_tx_data **ack_tdata)
{
pjsip_tx_data *ack = NULL;
const pjsip_msg *invite_msg;
const pjsip_from_hdr *from_hdr;
const pjsip_to_hdr *to_hdr;
const pjsip_cid_hdr *cid_hdr;
const pjsip_cseq_hdr *cseq_hdr;
const pjsip_hdr *hdr;
pjsip_hdr *via;
pjsip_to_hdr *to;
pj_status_t status;
/* rdata must be a non-2xx final response. */
pj_assert(rdata->msg_info.msg->type==PJSIP_RESPONSE_MSG &&
rdata->msg_info.msg->line.status.code >= 300);
/* Initialize return value to NULL. */
*ack_tdata = NULL;
/* The original INVITE message. */
invite_msg = tdata->msg;
/* Get the headers from original INVITE request. */
# define FIND_HDR(m,HNAME) pjsip_msg_find_hdr(m, PJSIP_H_##HNAME, NULL)
from_hdr = (const pjsip_from_hdr*) FIND_HDR(invite_msg, FROM);
PJ_ASSERT_ON_FAIL(from_hdr != NULL, goto on_missing_hdr);
to_hdr = (const pjsip_to_hdr*) FIND_HDR(invite_msg, TO);
PJ_ASSERT_ON_FAIL(to_hdr != NULL, goto on_missing_hdr);
cid_hdr = (const pjsip_cid_hdr*) FIND_HDR(invite_msg, CALL_ID);
PJ_ASSERT_ON_FAIL(to_hdr != NULL, goto on_missing_hdr);
cseq_hdr = (const pjsip_cseq_hdr*) FIND_HDR(invite_msg, CSEQ);
PJ_ASSERT_ON_FAIL(to_hdr != NULL, goto on_missing_hdr);
# undef FIND_HDR
/* Create new request message from the headers. */
status = pjsip_endpt_create_request_from_hdr(endpt,
pjsip_get_ack_method(),
tdata->msg->line.req.uri,
from_hdr, to_hdr,
NULL, cid_hdr,
cseq_hdr->cseq, NULL,
&ack);
if (status != PJ_SUCCESS)
return status;
/* Update tag in To header with the one from the response (if any). */
to = (pjsip_to_hdr*) pjsip_msg_find_hdr(ack->msg, PJSIP_H_TO, NULL);
pj_strdup(ack->pool, &to->tag, &rdata->msg_info.to->tag);
/* Clear Via headers in the new request. */
while ((via=(pjsip_hdr*)pjsip_msg_find_hdr(ack->msg, PJSIP_H_VIA, NULL)) != NULL)
pj_list_erase(via);
/* Must contain single Via, just as the original INVITE. */
hdr = (pjsip_hdr*) pjsip_msg_find_hdr( invite_msg, PJSIP_H_VIA, NULL);
pjsip_msg_insert_first_hdr( ack->msg,
(pjsip_hdr*) pjsip_hdr_clone(ack->pool,hdr) );
/* If the original INVITE has Route headers, those header fields MUST
* appear in the ACK.
*/
hdr = (pjsip_hdr*) pjsip_msg_find_hdr( invite_msg, PJSIP_H_ROUTE, NULL);
while (hdr != NULL) {
pjsip_msg_add_hdr( ack->msg,
(pjsip_hdr*) pjsip_hdr_clone(ack->pool, hdr) );
hdr = hdr->next;
if (hdr == &invite_msg->hdr)
break;
hdr = (pjsip_hdr*) pjsip_msg_find_hdr( invite_msg, PJSIP_H_ROUTE, hdr);
}
/* We're done.
* "tdata" parameter now contains the ACK message.
*/
*ack_tdata = ack;
return PJ_SUCCESS;
on_missing_hdr:
if (ack)
pjsip_tx_data_dec_ref(ack);
return PJSIP_EMISSINGHDR;
}
/*
* Construct CANCEL request for the previously sent request, according to
* chapter 9.1 of RFC3261.
*/
PJ_DEF(pj_status_t) pjsip_endpt_create_cancel( pjsip_endpoint *endpt,
const pjsip_tx_data *req_tdata,
pjsip_tx_data **p_tdata)
{
pjsip_tx_data *cancel_tdata = NULL;
const pjsip_from_hdr *from_hdr;
const pjsip_to_hdr *to_hdr;
const pjsip_cid_hdr *cid_hdr;
const pjsip_cseq_hdr *cseq_hdr;
const pjsip_hdr *hdr;
pjsip_hdr *via;
pj_status_t status;
/* The transmit buffer must INVITE request. */
PJ_ASSERT_RETURN(req_tdata->msg->type == PJSIP_REQUEST_MSG &&
req_tdata->msg->line.req.method.id == PJSIP_INVITE_METHOD,
PJ_EINVAL);
/* Get the headers from original INVITE request. */
# define FIND_HDR(m,HNAME) pjsip_msg_find_hdr(m, PJSIP_H_##HNAME, NULL)
from_hdr = (const pjsip_from_hdr*) FIND_HDR(req_tdata->msg, FROM);
PJ_ASSERT_ON_FAIL(from_hdr != NULL, goto on_missing_hdr);
to_hdr = (const pjsip_to_hdr*) FIND_HDR(req_tdata->msg, TO);
PJ_ASSERT_ON_FAIL(to_hdr != NULL, goto on_missing_hdr);
cid_hdr = (const pjsip_cid_hdr*) FIND_HDR(req_tdata->msg, CALL_ID);
PJ_ASSERT_ON_FAIL(to_hdr != NULL, goto on_missing_hdr);
cseq_hdr = (const pjsip_cseq_hdr*) FIND_HDR(req_tdata->msg, CSEQ);
PJ_ASSERT_ON_FAIL(to_hdr != NULL, goto on_missing_hdr);
# undef FIND_HDR
/* Create new request message from the headers. */
status = pjsip_endpt_create_request_from_hdr(endpt,
pjsip_get_cancel_method(),
req_tdata->msg->line.req.uri,
from_hdr, to_hdr,
NULL, cid_hdr,
cseq_hdr->cseq, NULL,
&cancel_tdata);
if (status != PJ_SUCCESS)
return status;
/* Clear Via headers in the new request. */
while ((via=(pjsip_hdr*)pjsip_msg_find_hdr(cancel_tdata->msg, PJSIP_H_VIA, NULL)) != NULL)
pj_list_erase(via);
/* Must only have single Via which matches the top-most Via in the
* request being cancelled.
*/
hdr = (pjsip_hdr*) pjsip_msg_find_hdr(req_tdata->msg, PJSIP_H_VIA, NULL);
if (hdr) {
pjsip_msg_insert_first_hdr(cancel_tdata->msg,
(pjsip_hdr*)pjsip_hdr_clone(cancel_tdata->pool, hdr));
}
/* If the original request has Route header, the CANCEL request must also
* has exactly the same.
* Copy "Route" header from the request.
*/
hdr = (pjsip_hdr*) pjsip_msg_find_hdr(req_tdata->msg, PJSIP_H_ROUTE, NULL);
while (hdr != NULL) {
pjsip_msg_add_hdr(cancel_tdata->msg,
(pjsip_hdr*) pjsip_hdr_clone(cancel_tdata->pool, hdr));
hdr = hdr->next;
if (hdr != &req_tdata->msg->hdr)
hdr = (pjsip_hdr*) pjsip_msg_find_hdr(req_tdata->msg,
PJSIP_H_ROUTE, hdr);
else
break;
}
/* Must also copy the saved strict route header, otherwise CANCEL will be
* sent with swapped Route and request URI!
*/
if (req_tdata->saved_strict_route) {
cancel_tdata->saved_strict_route = (pjsip_route_hdr*)
pjsip_hdr_clone(cancel_tdata->pool, req_tdata->saved_strict_route);
}
/* Copy the destination host name from the original request */
pj_strdup(cancel_tdata->pool, &cancel_tdata->dest_info.name,
&req_tdata->dest_info.name);
/* Finally copy the destination info from the original request */
pj_memcpy(&cancel_tdata->dest_info, &req_tdata->dest_info,
sizeof(req_tdata->dest_info));
/* Done.
* Return the transmit buffer containing the CANCEL request.
*/
*p_tdata = cancel_tdata;
return PJ_SUCCESS;
on_missing_hdr:
if (cancel_tdata)
pjsip_tx_data_dec_ref(cancel_tdata);
return PJSIP_EMISSINGHDR;
}
/* Fill-up destination information from a target URI */
static pj_status_t get_dest_info(const pjsip_uri *target_uri,
pj_pool_t *pool,
pjsip_host_info *dest_info)
{
/* The target URI must be a SIP/SIPS URL so we can resolve it's address.
* Otherwise we're in trouble (i.e. there's no host part in tel: URL).
*/
pj_bzero(dest_info, sizeof(*dest_info));
if (PJSIP_URI_SCHEME_IS_SIPS(target_uri)) {
pjsip_uri *uri = (pjsip_uri*) target_uri;
const pjsip_sip_uri *url=(const pjsip_sip_uri*)pjsip_uri_get_uri(uri);
unsigned flag;
dest_info->flag |= (PJSIP_TRANSPORT_SECURE | PJSIP_TRANSPORT_RELIABLE);
if (url->maddr_param.slen)
pj_strdup(pool, &dest_info->addr.host, &url->maddr_param);
else
pj_strdup(pool, &dest_info->addr.host, &url->host);
dest_info->addr.port = url->port;
dest_info->type =
pjsip_transport_get_type_from_name(&url->transport_param);
/* Double-check that the transport parameter match.
* Sample case: sips:host;transport=tcp
* See https://trac.pjsip.org/repos/ticket/1319
*/
flag = pjsip_transport_get_flag_from_type(dest_info->type);
if ((flag & dest_info->flag) != dest_info->flag) {
pjsip_transport_type_e t;
t = pjsip_transport_get_type_from_flag(dest_info->flag);
if (t != PJSIP_TRANSPORT_UNSPECIFIED)
dest_info->type = t;
}
} else if (PJSIP_URI_SCHEME_IS_SIP(target_uri)) {
pjsip_uri *uri = (pjsip_uri*) target_uri;
const pjsip_sip_uri *url=(const pjsip_sip_uri*)pjsip_uri_get_uri(uri);
if (url->maddr_param.slen)
pj_strdup(pool, &dest_info->addr.host, &url->maddr_param);
else
pj_strdup(pool, &dest_info->addr.host, &url->host);
dest_info->addr.port = url->port;
dest_info->type =
pjsip_transport_get_type_from_name(&url->transport_param);
dest_info->flag =
pjsip_transport_get_flag_from_type(dest_info->type);
} else {
/* Should have never reached here; app should have configured route
* set when sending to tel: URI
pj_assert(!"Unsupported URI scheme!");
*/
PJ_TODO(SUPPORT_REQUEST_ADDR_RESOLUTION_FOR_TEL_URI);
return PJSIP_ENOROUTESET;
}
/* Handle IPv6 (http://trac.pjsip.org/repos/ticket/861) */
if (dest_info->type != PJSIP_TRANSPORT_UNSPECIFIED &&
pj_strchr(&dest_info->addr.host, ':'))
{
dest_info->type = (pjsip_transport_type_e)
((int)dest_info->type | PJSIP_TRANSPORT_IPV6);
}
return PJ_SUCCESS;
}
/*
* Find which destination to be used to send the request message, based
* on the request URI and Route headers in the message. The procedure
* used here follows the guidelines on sending the request in RFC 3261
* chapter 8.1.2.
*/
PJ_DEF(pj_status_t) pjsip_get_request_dest(const pjsip_tx_data *tdata,
pjsip_host_info *dest_info )
{
const pjsip_uri *target_uri;
const pjsip_route_hdr *first_route_hdr;
PJ_ASSERT_RETURN(tdata->msg->type == PJSIP_REQUEST_MSG,
PJSIP_ENOTREQUESTMSG);
PJ_ASSERT_RETURN(dest_info != NULL, PJ_EINVAL);
/* Get the first "Route" header from the message.
*/
first_route_hdr = (const pjsip_route_hdr*)
pjsip_msg_find_hdr(tdata->msg, PJSIP_H_ROUTE, NULL);
if (first_route_hdr) {
target_uri = first_route_hdr->name_addr.uri;
} else {
target_uri = tdata->msg->line.req.uri;
}
return get_dest_info(target_uri, (pj_pool_t*)tdata->pool, dest_info);
}
/*
* Process route-set found in the request and calculate
* the destination to be used to send the request message, based
* on the request URI and Route headers in the message. The procedure
* used here follows the guidelines on sending the request in RFC 3261
* chapter 8.1.2.
*/
PJ_DEF(pj_status_t) pjsip_process_route_set(pjsip_tx_data *tdata,
pjsip_host_info *dest_info )
{
const pjsip_uri *new_request_uri, *target_uri;
const pjsip_name_addr *topmost_route_uri;
pjsip_route_hdr *first_route_hdr, *last_route_hdr;
pj_status_t status;
PJ_ASSERT_RETURN(tdata->msg->type == PJSIP_REQUEST_MSG,
PJSIP_ENOTREQUESTMSG);
PJ_ASSERT_RETURN(dest_info != NULL, PJ_EINVAL);
/* If the request contains strict route, check that the strict route
* has been restored to its original values before processing the
* route set. The strict route is restored to the original values
* with pjsip_restore_strict_route_set(). If caller did not restore
* the strict route before calling this function, we need to call it
* here, or otherwise the strict-route and Request-URI will be swapped
* twice!
*/
if (tdata->saved_strict_route != NULL) {
pjsip_restore_strict_route_set(tdata);
}
PJ_ASSERT_RETURN(tdata->saved_strict_route==NULL, PJ_EBUG);
/* Find the first and last "Route" headers from the message. */
last_route_hdr = first_route_hdr = (pjsip_route_hdr*)
pjsip_msg_find_hdr(tdata->msg, PJSIP_H_ROUTE, NULL);
if (first_route_hdr) {
topmost_route_uri = &first_route_hdr->name_addr;
while (last_route_hdr->next != (void*)&tdata->msg->hdr) {
pjsip_route_hdr *hdr;
hdr = (pjsip_route_hdr*)
pjsip_msg_find_hdr(tdata->msg, PJSIP_H_ROUTE,
last_route_hdr->next);
if (!hdr)
break;
last_route_hdr = hdr;
}
} else {
topmost_route_uri = NULL;
}
/* If Route headers exist, and the first element indicates loose-route,
* the URI is taken from the Request-URI, and we keep all existing Route
* headers intact.
* If Route headers exist, and the first element DOESN'T indicate loose
* route, the URI is taken from the first Route header, and remove the
* first Route header from the message.
* Otherwise if there's no Route headers, the URI is taken from the
* Request-URI.
*/
if (topmost_route_uri) {
pj_bool_t has_lr_param;
if (PJSIP_URI_SCHEME_IS_SIP(topmost_route_uri) ||
PJSIP_URI_SCHEME_IS_SIPS(topmost_route_uri))
{
const pjsip_sip_uri *url = (const pjsip_sip_uri*)
pjsip_uri_get_uri((const void*)topmost_route_uri);
has_lr_param = url->lr_param;
} else {
has_lr_param = 0;
}
if (has_lr_param) {
new_request_uri = tdata->msg->line.req.uri;
/* We shouldn't need to delete topmost Route if it has lr param.
* But seems like it breaks some proxy implementation, so we
* delete it anyway.
*/
/*
pj_list_erase(first_route_hdr);
if (first_route_hdr == last_route_hdr)
last_route_hdr = NULL;
*/
} else {
new_request_uri = (const pjsip_uri*)
pjsip_uri_get_uri((pjsip_uri*)topmost_route_uri);
pj_list_erase(first_route_hdr);
tdata->saved_strict_route = first_route_hdr;
if (first_route_hdr == last_route_hdr)
first_route_hdr = last_route_hdr = NULL;
}
target_uri = (pjsip_uri*)topmost_route_uri;
} else {
target_uri = new_request_uri = tdata->msg->line.req.uri;
}
/* Fill up the destination host/port from the URI. */
status = get_dest_info(target_uri, tdata->pool, dest_info);
if (status != PJ_SUCCESS)
return status;
/* If target URI is different than request URI, replace
* request URI add put the original URI in the last Route header.
*/
if (new_request_uri && new_request_uri!=tdata->msg->line.req.uri) {
pjsip_route_hdr *route = pjsip_route_hdr_create(tdata->pool);
route->name_addr.uri = (pjsip_uri*)
pjsip_uri_get_uri(tdata->msg->line.req.uri);
if (last_route_hdr)
pj_list_insert_after(last_route_hdr, route);
else
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)route);
tdata->msg->line.req.uri = (pjsip_uri*)new_request_uri;
}
/* Success. */
return PJ_SUCCESS;
}
/*
* Swap the request URI and strict route back to the original position
* before #pjsip_process_route_set() function is called. This function
* should only used internally by PJSIP client authentication module.
*/
PJ_DEF(void) pjsip_restore_strict_route_set(pjsip_tx_data *tdata)
{
pjsip_route_hdr *first_route_hdr, *last_route_hdr;
/* Check if we have found strict route before */
if (tdata->saved_strict_route == NULL) {
/* This request doesn't contain strict route */
return;
}
/* Find the first "Route" headers from the message. */
first_route_hdr = (pjsip_route_hdr*)
pjsip_msg_find_hdr(tdata->msg, PJSIP_H_ROUTE, NULL);
if (first_route_hdr == NULL) {
/* User has modified message route? We don't expect this! */
pj_assert(!"Message route was modified?");
tdata->saved_strict_route = NULL;
return;
}
/* Find last Route header */
last_route_hdr = first_route_hdr;
while (last_route_hdr->next != (void*)&tdata->msg->hdr) {
pjsip_route_hdr *hdr;
hdr = (pjsip_route_hdr*)
pjsip_msg_find_hdr(tdata->msg, PJSIP_H_ROUTE,
last_route_hdr->next);
if (!hdr)
break;
last_route_hdr = hdr;
}
/* Put the last Route header as request URI, delete last Route
* header, and insert the saved strict route as the first Route.
*/
tdata->msg->line.req.uri = last_route_hdr->name_addr.uri;
pj_list_insert_before(first_route_hdr, tdata->saved_strict_route);
pj_list_erase(last_route_hdr);
/* Reset */
tdata->saved_strict_route = NULL;
}
/* Transport callback for sending stateless request.
* This is one of the most bizzare function in pjsip, so
* good luck if you happen to debug this function!!
*/
static void stateless_send_transport_cb( void *token,
pjsip_tx_data *tdata,
pj_ssize_t sent )
{
pjsip_send_state *stateless_data = (pjsip_send_state*) token;
PJ_UNUSED_ARG(tdata);
pj_assert(tdata == stateless_data->tdata);
for (;;) {
pj_status_t status;
pj_bool_t cont;
pj_sockaddr_t *cur_addr;
pjsip_transport_type_e cur_addr_type;
int cur_addr_len;
pjsip_via_hdr *via;
if (sent == -PJ_EPENDING) {
/* This is the initial process.
* When the process started, this function will be called by
* stateless_send_resolver_callback() with sent argument set to
* -PJ_EPENDING.
*/
cont = PJ_TRUE;
} else {
/* There are two conditions here:
* (1) Message is sent (i.e. sent > 0),
* (2) Failure (i.e. sent <= 0)
*/
cont = (sent > 0) ? PJ_FALSE :
(tdata->dest_info.cur_addr<tdata->dest_info.addr.count-1);
if (stateless_data->app_cb) {
(*stateless_data->app_cb)(stateless_data, sent, &cont);
} else {
/* Doesn't have application callback.
* Terminate the process.
*/
cont = PJ_FALSE;
}
}
/* Finished with this transport. */
if (stateless_data->cur_transport) {
pjsip_transport_dec_ref(stateless_data->cur_transport);
stateless_data->cur_transport = NULL;
}
/* Done if application doesn't want to continue. */
if (sent > 0 || !cont) {
pjsip_tx_data_dec_ref(tdata);
return;
}
/* Try next address, if any, and only when this is not the
* first invocation.
*/
if (sent != -PJ_EPENDING) {
tdata->dest_info.cur_addr++;
}
/* Have next address? */
if (tdata->dest_info.cur_addr >= tdata->dest_info.addr.count) {
/* This only happens when a rather buggy application has
* sent 'cont' to PJ_TRUE when the initial value was PJ_FALSE.
* In this case just stop the processing; we don't need to
* call the callback again as application has been informed
* before.
*/
pjsip_tx_data_dec_ref(tdata);
return;
}
/* Keep current server address information handy. */
cur_addr = &tdata->dest_info.addr.entry[tdata->dest_info.cur_addr].addr;
cur_addr_type = tdata->dest_info.addr.entry[tdata->dest_info.cur_addr].type;
cur_addr_len = tdata->dest_info.addr.entry[tdata->dest_info.cur_addr].addr_len;
/* Acquire transport. */
status = pjsip_endpt_acquire_transport2(stateless_data->endpt,
cur_addr_type,
cur_addr,
cur_addr_len,
&tdata->tp_sel,
tdata,
&stateless_data->cur_transport);
if (status != PJ_SUCCESS) {
sent = -status;
continue;
}
/* Modify Via header. */
via = (pjsip_via_hdr*) pjsip_msg_find_hdr( tdata->msg,
PJSIP_H_VIA, NULL);
if (!via) {
/* Shouldn't happen if request was created with PJSIP API!
* But we handle the case anyway for robustness.
*/
pj_assert(!"Via header not found!");
via = pjsip_via_hdr_create(tdata->pool);
pjsip_msg_insert_first_hdr(tdata->msg, (pjsip_hdr*)via);
}
if (via->branch_param.slen == 0) {
pj_str_t tmp;
via->branch_param.ptr = (char*)pj_pool_alloc(tdata->pool,
PJSIP_MAX_BRANCH_LEN);
via->branch_param.slen = PJSIP_MAX_BRANCH_LEN;
pj_memcpy(via->branch_param.ptr, PJSIP_RFC3261_BRANCH_ID,
PJSIP_RFC3261_BRANCH_LEN);
tmp.ptr = via->branch_param.ptr + PJSIP_RFC3261_BRANCH_LEN + 2;
*(tmp.ptr-2) = 80; *(tmp.ptr-1) = 106;
pj_generate_unique_string(&tmp);
}
via->transport = pj_str(stateless_data->cur_transport->type_name);
if (tdata->via_addr.host.slen > 0 &&
tdata->via_tp == (void *)stateless_data->cur_transport)
{
via->sent_by = tdata->via_addr;
} else {
via->sent_by = stateless_data->cur_transport->local_name;
}
via->rport_param = pjsip_cfg()->endpt.disable_rport ? -1 : 0;
/* Add/remove "alias" param to/from Via header on connection
* oriented/less transport, if configured.
*/
if (pjsip_cfg()->endpt.req_has_via_alias &&
tdata->msg->type == PJSIP_REQUEST_MSG)
{
const pj_str_t ALIAS_STR = {"alias", 5};
pjsip_param *alias_param;
pj_bool_t is_datagram;
alias_param = pjsip_param_find(&via->other_param, &ALIAS_STR);
is_datagram = (stateless_data->cur_transport->flag &
PJSIP_TRANSPORT_DATAGRAM);
if (!is_datagram && !alias_param) {
alias_param = PJ_POOL_ZALLOC_T(tdata->pool, pjsip_param);
alias_param->name = ALIAS_STR;
pj_list_push_back(&via->other_param, alias_param);
} else if (is_datagram && alias_param) {
pj_list_erase(alias_param);
}
}
pjsip_tx_data_invalidate_msg(tdata);
/* Send message using this transport. */
status = pjsip_transport_send( stateless_data->cur_transport,
tdata,
cur_addr,
cur_addr_len,
stateless_data,
&stateless_send_transport_cb);
if (status == PJ_SUCCESS) {
/* Recursively call this function. */
sent = tdata->buf.cur - tdata->buf.start;
stateless_send_transport_cb( stateless_data, tdata, sent );
return;
} else if (status == PJ_EPENDING) {
/* This callback will be called later. */
return;
} else {
/* Recursively call this function. */
sent = -status;
stateless_send_transport_cb( stateless_data, tdata, sent );
return;
}
}
}
/* Resolver callback for sending stateless request. */
static void
stateless_send_resolver_callback( pj_status_t status,
void *token,
const struct pjsip_server_addresses *addr)
{
pjsip_send_state *stateless_data = (pjsip_send_state*) token;
pjsip_tx_data *tdata = stateless_data->tdata;
/* Fail on server resolution. */
if (status != PJ_SUCCESS) {
if (stateless_data->app_cb) {
pj_bool_t cont = PJ_FALSE;
(*stateless_data->app_cb)(stateless_data, -status, &cont);
}
pjsip_tx_data_dec_ref(tdata);
return;
}
/* Copy server addresses */
if (addr && addr != &tdata->dest_info.addr) {
pj_memcpy( &tdata->dest_info.addr, addr,
sizeof(pjsip_server_addresses));
}
pj_assert(tdata->dest_info.addr.count != 0);
/* RFC 3261 section 18.1.1:
* If a request is within 200 bytes of the path MTU, or if it is larger
* than 1300 bytes and the path MTU is unknown, the request MUST be sent
* using an RFC 2914 [43] congestion controlled transport protocol, such
* as TCP.
*/
if (pjsip_cfg()->endpt.disable_tcp_switch==0 &&
tdata->msg->type == PJSIP_REQUEST_MSG &&
tdata->dest_info.addr.count > 0 &&
tdata->dest_info.addr.entry[0].type == PJSIP_TRANSPORT_UDP)
{
int len;
/* Encode the request */
status = pjsip_tx_data_encode(tdata);
if (status != PJ_SUCCESS) {
if (stateless_data->app_cb) {
pj_bool_t cont = PJ_FALSE;
(*stateless_data->app_cb)(stateless_data, -status, &cont);
}
pjsip_tx_data_dec_ref(tdata);
return;
}
/* Check if request message is larger than 1300 bytes. */
len = (int)(tdata->buf.cur - tdata->buf.start);
if (len >= PJSIP_UDP_SIZE_THRESHOLD) {
int i;
int count = tdata->dest_info.addr.count;
PJ_LOG(5,(THIS_FILE, "%s exceeds UDP size threshold (%u), "
"sending with TCP",
pjsip_tx_data_get_info(tdata),
PJSIP_UDP_SIZE_THRESHOLD));
/* Insert "TCP version" of resolved UDP addresses at the
* beginning.
*/
if (count * 2 > PJSIP_MAX_RESOLVED_ADDRESSES)
count = PJSIP_MAX_RESOLVED_ADDRESSES / 2;
for (i = 0; i < count; ++i) {
pj_memcpy(&tdata->dest_info.addr.entry[i+count],
&tdata->dest_info.addr.entry[i],
sizeof(tdata->dest_info.addr.entry[0]));
tdata->dest_info.addr.entry[i].type = PJSIP_TRANSPORT_TCP;
}
tdata->dest_info.addr.count = count * 2;
}
}
/* Process the addresses. */
stateless_send_transport_cb( stateless_data, tdata, -PJ_EPENDING);
}
/*
* Send stateless request.
* The sending process consists of several stages:
* - determine which host to contact (#pjsip_get_request_addr).
* - resolve the host (#pjsip_endpt_resolve)
* - establish transport (#pjsip_endpt_acquire_transport)
* - send the message (#pjsip_transport_send)
*/
PJ_DEF(pj_status_t) pjsip_endpt_send_request_stateless(pjsip_endpoint *endpt,
pjsip_tx_data *tdata,
void *token,
pjsip_send_callback cb)
{
pjsip_host_info dest_info;
pjsip_send_state *stateless_data;
pj_status_t status;
PJ_ASSERT_RETURN(endpt && tdata, PJ_EINVAL);
/* Get destination name to contact. */
status = pjsip_process_route_set(tdata, &dest_info);
if (status != PJ_SUCCESS)
return status;
/* Keep stateless data. */
stateless_data = PJ_POOL_ZALLOC_T(tdata->pool, pjsip_send_state);
stateless_data->token = token;
stateless_data->endpt = endpt;
stateless_data->tdata = tdata;
stateless_data->app_cb = cb;
/* If destination info has not been initialized (this applies for most
* all requests except CANCEL), resolve destination host. The processing
* then resumed when the resolving callback is called. For CANCEL, the
* destination info must have been copied from the original INVITE so
* proceed to sending the request directly.
*/
if (tdata->dest_info.addr.count == 0) {
/* Copy the destination host name to TX data */
pj_strdup(tdata->pool, &tdata->dest_info.name, &dest_info.addr.host);
pjsip_endpt_resolve( endpt, tdata->pool, &dest_info, stateless_data,
&stateless_send_resolver_callback);
} else {
PJ_LOG(5,(THIS_FILE, "%s: skipping target resolution because "
"address is already set",
pjsip_tx_data_get_info(tdata)));
stateless_send_resolver_callback(PJ_SUCCESS, stateless_data,
&tdata->dest_info.addr);
}
return PJ_SUCCESS;
}
/*
* Send raw data to a destination.
*/
PJ_DEF(pj_status_t) pjsip_endpt_send_raw( pjsip_endpoint *endpt,
pjsip_transport_type_e tp_type,
const pjsip_tpselector *sel,
const void *raw_data,
pj_size_t data_len,
const pj_sockaddr_t *addr,
int addr_len,
void *token,
pjsip_tp_send_callback cb)
{
return pjsip_tpmgr_send_raw(pjsip_endpt_get_tpmgr(endpt), tp_type, sel,
NULL, raw_data, data_len, addr, addr_len,
token, cb);
}
/* Callback data for sending raw data */
struct send_raw_data
{
pjsip_endpoint *endpt;
pjsip_tx_data *tdata;
pjsip_tpselector *sel;
void *app_token;
pjsip_tp_send_callback app_cb;
};
/* Resolver callback for sending raw data. */
static void send_raw_resolver_callback( pj_status_t status,
void *token,
const pjsip_server_addresses *addr)
{
struct send_raw_data *sraw_data = (struct send_raw_data*) token;
if (status != PJ_SUCCESS) {
if (sraw_data->app_cb) {
(*sraw_data->app_cb)(sraw_data->app_token, sraw_data->tdata,
-status);
}
} else {
pj_size_t data_len;
pj_assert(addr->count != 0);
/* Avoid tdata destroyed by pjsip_tpmgr_send_raw(). */
pjsip_tx_data_add_ref(sraw_data->tdata);
data_len = sraw_data->tdata->buf.cur - sraw_data->tdata->buf.start;
status = pjsip_tpmgr_send_raw(pjsip_endpt_get_tpmgr(sraw_data->endpt),
addr->entry[0].type,
sraw_data->sel, sraw_data->tdata,
sraw_data->tdata->buf.start, data_len,
&addr->entry[0].addr,
addr->entry[0].addr_len,
sraw_data->app_token,
sraw_data->app_cb);
if (status == PJ_SUCCESS) {
(*sraw_data->app_cb)(sraw_data->app_token, sraw_data->tdata,
data_len);
} else if (status != PJ_EPENDING) {
(*sraw_data->app_cb)(sraw_data->app_token, sraw_data->tdata,
-status);
}
}
if (sraw_data->sel) {
pjsip_tpselector_dec_ref(sraw_data->sel);
}
pjsip_tx_data_dec_ref(sraw_data->tdata);
}
/*
* Send raw data to the specified destination URI.
*/
PJ_DEF(pj_status_t) pjsip_endpt_send_raw_to_uri(pjsip_endpoint *endpt,
const pj_str_t *p_dst_uri,
const pjsip_tpselector *sel,
const void *raw_data,
pj_size_t data_len,
void *token,
pjsip_tp_send_callback cb)
{
pjsip_tx_data *tdata;
struct send_raw_data *sraw_data;
pj_str_t dst_uri;
pjsip_uri *uri;
pjsip_host_info dest_info;
pj_status_t status;
/* Allocate buffer */
status = pjsip_endpt_create_tdata(endpt, &tdata);
if (status != PJ_SUCCESS)
return status;
pjsip_tx_data_add_ref(tdata);
/* Duplicate URI since parser requires URI to be NULL terminated */
pj_strdup_with_null(tdata->pool, &dst_uri, p_dst_uri);
/* Parse URI */
uri = pjsip_parse_uri(tdata->pool, dst_uri.ptr, dst_uri.slen, 0);
if (uri == NULL) {
pjsip_tx_data_dec_ref(tdata);
return PJSIP_EINVALIDURI;
}
/* Build destination info. */
status = get_dest_info(uri, tdata->pool, &dest_info);
if (status != PJ_SUCCESS) {
pjsip_tx_data_dec_ref(tdata);
return status;
}
/* Copy data (note: data_len may be zero!) */
tdata->buf.start = (char*) pj_pool_alloc(tdata->pool, data_len+1);
tdata->buf.end = tdata->buf.start + data_len + 1;
if (data_len)
pj_memcpy(tdata->buf.start, raw_data, data_len);
tdata->buf.cur = tdata->buf.start + data_len;
/* Init send_raw_data */
sraw_data = PJ_POOL_ZALLOC_T(tdata->pool, struct send_raw_data);
sraw_data->endpt = endpt;
sraw_data->tdata = tdata;
sraw_data->app_token = token;
sraw_data->app_cb = cb;
if (sel) {
sraw_data->sel = PJ_POOL_ALLOC_T(tdata->pool, pjsip_tpselector);
pj_memcpy(sraw_data->sel, sel, sizeof(pjsip_tpselector));
pjsip_tpselector_add_ref(sraw_data->sel);
}
/* Copy the destination host name to TX data */
pj_strdup(tdata->pool, &tdata->dest_info.name, &dest_info.addr.host);
/* Resolve destination host.
* The processing then resumed when the resolving callback is called.
*/
pjsip_endpt_resolve( endpt, tdata->pool, &dest_info, sraw_data,
&send_raw_resolver_callback);
return PJ_SUCCESS;
}
/*
* Determine which address (and transport) to use to send response message
* based on the received request. This function follows the specification
* in section 18.2.2 of RFC 3261 and RFC 3581 for calculating the destination
* address and transport.
*/
PJ_DEF(pj_status_t) pjsip_get_response_addr( pj_pool_t *pool,
pjsip_rx_data *rdata,
pjsip_response_addr *res_addr )
{
pjsip_transport *src_transport = rdata->tp_info.transport;
/* Check arguments. */
PJ_ASSERT_RETURN(pool && rdata && res_addr, PJ_EINVAL);
/* rdata must be a request message! */
PJ_ASSERT_RETURN(rdata->msg_info.msg->type == PJSIP_REQUEST_MSG,
PJ_EINVAL);
/* All requests must have "received" parameter.
* This must always be done in transport layer.
*/
pj_assert(rdata->msg_info.via->recvd_param.slen != 0);
/* Do the calculation based on RFC 3261 Section 18.2.2 and RFC 3581 */
if (PJSIP_TRANSPORT_IS_RELIABLE(src_transport)) {
/* For reliable protocol such as TCP or SCTP, or TLS over those, the
* response MUST be sent using the existing connection to the source
* of the original request that created the transaction, if that
* connection is still open.
* If that connection is no longer open, the server SHOULD open a
* connection to the IP address in the received parameter, if present,
* using the port in the sent-by value, or the default port for that
* transport, if no port is specified.
* If that connection attempt fails, the server SHOULD use the
* procedures in [4] for servers in order to determine the IP address
* and port to open the connection and send the response to.
*/
res_addr->transport = rdata->tp_info.transport;
pj_memcpy(&res_addr->addr, &rdata->pkt_info.src_addr,
rdata->pkt_info.src_addr_len);
res_addr->addr_len = rdata->pkt_info.src_addr_len;
res_addr->dst_host.type=(pjsip_transport_type_e)src_transport->key.type;
res_addr->dst_host.flag = src_transport->flag;
pj_strdup( pool, &res_addr->dst_host.addr.host,
&rdata->msg_info.via->recvd_param);
res_addr->dst_host.addr.port = rdata->msg_info.via->sent_by.port;
if (res_addr->dst_host.addr.port == 0) {
res_addr->dst_host.addr.port =
pjsip_transport_get_default_port_for_type(res_addr->dst_host.type);
}
} else if (rdata->msg_info.via->maddr_param.slen) {
/* Otherwise, if the Via header field value contains a maddr parameter,
* the response MUST be forwarded to the address listed there, using
* the port indicated in sent-by, or port 5060 if none is present.
* If the address is a multicast address, the response SHOULD be sent
* using the TTL indicated in the ttl parameter, or with a TTL of 1 if
* that parameter is not present.
*/
res_addr->transport = NULL;
res_addr->dst_host.type=(pjsip_transport_type_e)src_transport->key.type;
res_addr->dst_host.flag = src_transport->flag;
pj_strdup( pool, &res_addr->dst_host.addr.host,
&rdata->msg_info.via->maddr_param);
res_addr->dst_host.addr.port = rdata->msg_info.via->sent_by.port;
if (res_addr->dst_host.addr.port == 0)
res_addr->dst_host.addr.port = 5060;
} else if (rdata->msg_info.via->rport_param >= 0) {
/* There is both a "received" parameter and an "rport" parameter,
* the response MUST be sent to the IP address listed in the "received"
* parameter, and the port in the "rport" parameter.
* The response MUST be sent from the same address and port that the
* corresponding request was received on.
*/
res_addr->transport = rdata->tp_info.transport;
pj_memcpy(&res_addr->addr, &rdata->pkt_info.src_addr,
rdata->pkt_info.src_addr_len);
res_addr->addr_len = rdata->pkt_info.src_addr_len;
res_addr->dst_host.type=(pjsip_transport_type_e)src_transport->key.type;
res_addr->dst_host.flag = src_transport->flag;
pj_strdup( pool, &res_addr->dst_host.addr.host,
&rdata->msg_info.via->recvd_param);
res_addr->dst_host.addr.port = rdata->msg_info.via->sent_by.port;
if (res_addr->dst_host.addr.port == 0) {
res_addr->dst_host.addr.port =
pjsip_transport_get_default_port_for_type(res_addr->dst_host.type);
}
} else {
res_addr->transport = NULL;
res_addr->dst_host.type=(pjsip_transport_type_e)src_transport->key.type;
res_addr->dst_host.flag = src_transport->flag;
pj_strdup( pool, &res_addr->dst_host.addr.host,
&rdata->msg_info.via->recvd_param);
res_addr->dst_host.addr.port = rdata->msg_info.via->sent_by.port;
if (res_addr->dst_host.addr.port == 0) {
res_addr->dst_host.addr.port =
pjsip_transport_get_default_port_for_type(res_addr->dst_host.type);
}
}
return PJ_SUCCESS;
}
/*
* Callback called by transport during send_response.
*/
static void send_response_transport_cb(void *token, pjsip_tx_data *tdata,
pj_ssize_t sent)
{
pjsip_send_state *send_state = (pjsip_send_state*) token;
pj_bool_t cont = PJ_FALSE;
/* Call callback, if any. */
if (send_state->app_cb)
(*send_state->app_cb)(send_state, sent, &cont);
/* Decrement transport reference counter. */
pjsip_transport_dec_ref(send_state->cur_transport);
/* Decrement transmit data ref counter. */
pjsip_tx_data_dec_ref(tdata);
}
/*
* Resolver calback during send_response.
*/
static void send_response_resolver_cb( pj_status_t status, void *token,
const pjsip_server_addresses *addr )
{
pjsip_send_state *send_state = (pjsip_send_state*) token;
if (status != PJ_SUCCESS) {
if (send_state->app_cb) {
pj_bool_t cont = PJ_FALSE;
(*send_state->app_cb)(send_state, -status, &cont);
}
pjsip_tx_data_dec_ref(send_state->tdata);
return;
}
/* Only handle the first address resolved. */
/* Acquire transport. */
status = pjsip_endpt_acquire_transport2(send_state->endpt,
addr->entry[0].type,
&addr->entry[0].addr,
addr->entry[0].addr_len,
&send_state->tdata->tp_sel,
send_state->tdata,
&send_state->cur_transport);
if (status != PJ_SUCCESS) {
if (send_state->app_cb) {
pj_bool_t cont = PJ_FALSE;
(*send_state->app_cb)(send_state, -status, &cont);
}
pjsip_tx_data_dec_ref(send_state->tdata);
return;
}
/* Update address in send_state. */
pj_memcpy(&send_state->tdata->dest_info.addr, addr, sizeof(*addr));
/* Send response using the transoprt. */
status = pjsip_transport_send( send_state->cur_transport,
send_state->tdata,
&addr->entry[0].addr,
addr->entry[0].addr_len,
send_state,
&send_response_transport_cb);
if (status == PJ_SUCCESS) {
pj_ssize_t sent = send_state->tdata->buf.cur -
send_state->tdata->buf.start;
send_response_transport_cb(send_state, send_state->tdata, sent);
} else if (status == PJ_EPENDING) {
/* Transport callback will be called later. */
} else {
send_response_transport_cb(send_state, send_state->tdata, -status);
}
}
/*
* Send response.
*/
PJ_DEF(pj_status_t) pjsip_endpt_send_response( pjsip_endpoint *endpt,
pjsip_response_addr *res_addr,
pjsip_tx_data *tdata,
void *token,
pjsip_send_callback cb)
{
/* Determine which transports and addresses to send the response,
* based on Section 18.2.2 of RFC 3261.
*/
pjsip_send_state *send_state;
pj_status_t status;
/* Create structure to keep the sending state. */
send_state = PJ_POOL_ZALLOC_T(tdata->pool, pjsip_send_state);
send_state->endpt = endpt;
send_state->tdata = tdata;
send_state->token = token;
send_state->app_cb = cb;
if (res_addr->transport != NULL) {
send_state->cur_transport = res_addr->transport;
pjsip_transport_add_ref(send_state->cur_transport);
status = pjsip_transport_send( send_state->cur_transport, tdata,
&res_addr->addr,
res_addr->addr_len,
send_state,
&send_response_transport_cb );
if (status == PJ_SUCCESS) {
pj_ssize_t sent = tdata->buf.cur - tdata->buf.start;
send_response_transport_cb(send_state, tdata, sent);
return PJ_SUCCESS;
} else if (status == PJ_EPENDING) {
/* Callback will be called later. */
return PJ_SUCCESS;
} else {
pjsip_transport_dec_ref(send_state->cur_transport);
return status;
}
} else {
/* Copy the destination host name to TX data */
pj_strdup(tdata->pool, &tdata->dest_info.name,
&res_addr->dst_host.addr.host);
pjsip_endpt_resolve(endpt, tdata->pool, &res_addr->dst_host,
send_state, &send_response_resolver_cb);
return PJ_SUCCESS;
}
}
/*
* Send response combo
*/
PJ_DEF(pj_status_t) pjsip_endpt_send_response2( pjsip_endpoint *endpt,
pjsip_rx_data *rdata,
pjsip_tx_data *tdata,
void *token,
pjsip_send_callback cb)
{
pjsip_response_addr res_addr;
pj_status_t status;
status = pjsip_get_response_addr(tdata->pool, rdata, &res_addr);
if (status != PJ_SUCCESS) {
pjsip_tx_data_dec_ref(tdata);
return PJ_SUCCESS;
}
status = pjsip_endpt_send_response(endpt, &res_addr, tdata, token, cb);
return status;
}
/*
* Send response
*/
PJ_DEF(pj_status_t) pjsip_endpt_respond_stateless( pjsip_endpoint *endpt,
pjsip_rx_data *rdata,
int st_code,
const pj_str_t *st_text,
const pjsip_hdr *hdr_list,
const pjsip_msg_body *body)
{
pj_status_t status;
pjsip_response_addr res_addr;
pjsip_tx_data *tdata;
/* Verify arguments. */
PJ_ASSERT_RETURN(endpt && rdata, PJ_EINVAL);
PJ_ASSERT_RETURN(rdata->msg_info.msg->type == PJSIP_REQUEST_MSG,
PJSIP_ENOTREQUESTMSG);
/* Check that no UAS transaction has been created for this request.
* If UAS transaction has been created for this request, application
* MUST send the response statefully using that transaction.
*/
PJ_ASSERT_RETURN(pjsip_rdata_get_tsx(rdata)==NULL, PJ_EINVALIDOP);
/* Create response message */
status = pjsip_endpt_create_response( endpt, rdata, st_code, st_text,
&tdata);
if (status != PJ_SUCCESS)
return status;
/* Add the message headers, if any */
if (hdr_list) {
const pjsip_hdr *hdr = hdr_list->next;
while (hdr != hdr_list) {
pjsip_msg_add_hdr(tdata->msg,
(pjsip_hdr*) pjsip_hdr_clone(tdata->pool, hdr) );
hdr = hdr->next;
}
}
/* Add the message body, if any. */
if (body) {
tdata->msg->body = pjsip_msg_body_clone( tdata->pool, body );
if (tdata->msg->body == NULL) {
pjsip_tx_data_dec_ref(tdata);
return status;
}
}
/* Get where to send request. */
status = pjsip_get_response_addr( tdata->pool, rdata, &res_addr );
if (status != PJ_SUCCESS) {
pjsip_tx_data_dec_ref(tdata);
return status;
}
/* Send! */
status = pjsip_endpt_send_response( endpt, &res_addr, tdata, NULL, NULL );
if (status != PJ_SUCCESS) {
pjsip_tx_data_dec_ref(tdata);
return status;
}
return PJ_SUCCESS;
}
/*
* Get the event string from the event ID.
*/
PJ_DEF(const char *) pjsip_event_str(pjsip_event_id_e e)
{
return event_str[e];
}