void sal_call_send_vfu_request(SalOp *op){
char info_body[] =
"<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
"<media_control>"
" <vc_primitive>"
" <to_encoder>"
" <picture_fast_update></picture_fast_update>"
" </to_encoder>"
" </vc_primitive>"
"</media_control>";
size_t content_lenth = sizeof(info_body) - 1;
belle_sip_dialog_state_t dialog_state=op->dialog?belle_sip_dialog_get_state(op->dialog):BELLE_SIP_DIALOG_NULL; /*no dialog = dialog in NULL state*/
if (dialog_state == BELLE_SIP_DIALOG_CONFIRMED) {
belle_sip_request_t* info = belle_sip_dialog_create_queued_request(op->dialog,"INFO");
int error=TRUE;
if (info) {
belle_sip_message_add_header(BELLE_SIP_MESSAGE(info),BELLE_SIP_HEADER(belle_sip_header_content_type_create("application","media_control+xml")));
belle_sip_message_add_header(BELLE_SIP_MESSAGE(info),BELLE_SIP_HEADER(belle_sip_header_content_length_create(content_lenth)));
belle_sip_message_set_body(BELLE_SIP_MESSAGE(info),info_body,content_lenth);
error=sal_op_send_request(op,info);
}
if (error)
ms_warning("Cannot send vfu request to [%s] ", sal_op_get_to(op));
} else {
ms_warning("Cannot send vfu request to [%s] because dialog [%p] in wrong state [%s]",sal_op_get_to(op)
,op->dialog
,belle_sip_dialog_state_to_string(dialog_state));
}
return ;
}
int sal_call_refer_with_replaces(SalOp *op, SalOp *other_call_op){
belle_sip_dialog_state_t other_call_dialog_state=other_call_op->dialog?belle_sip_dialog_get_state(other_call_op->dialog):BELLE_SIP_DIALOG_NULL;
belle_sip_dialog_state_t op_dialog_state=op->dialog?belle_sip_dialog_get_state(op->dialog):BELLE_SIP_DIALOG_NULL;
belle_sip_header_replaces_t* replaces;
belle_sip_header_refer_to_t* refer_to;
belle_sip_header_referred_by_t* referred_by;
const char* from_tag;
const char* to_tag;
char* escaped_replaces;
/*first, build refer to*/
if ((other_call_dialog_state!=BELLE_SIP_DIALOG_CONFIRMED) && (other_call_dialog_state!=BELLE_SIP_DIALOG_EARLY)) {
ms_error("wrong dialog state [%s] for op [%p], should be BELLE_SIP_DIALOG_CONFIRMED or BELE_SIP_DIALOG_EARLY",
belle_sip_dialog_state_to_string(other_call_dialog_state),
other_call_op);
return -1;
}
if (op_dialog_state!=BELLE_SIP_DIALOG_CONFIRMED) {
ms_error("wrong dialog state [%s] for op [%p], should be BELLE_SIP_DIALOG_CONFIRMED",
belle_sip_dialog_state_to_string(op_dialog_state),
op);
return -1;
}
refer_to=belle_sip_header_refer_to_create(belle_sip_dialog_get_remote_party(other_call_op->dialog));
belle_sip_parameters_clean(BELLE_SIP_PARAMETERS(refer_to));
/*rfc3891
...
4. User Agent Client Behavior: Sending a Replaces Header
A User Agent that wishes to replace a single existing early or
confirmed dialog with a new dialog of its own, MAY send the target
User Agent an INVITE request containing a Replaces header field. The
User Agent Client (UAC) places the Call-ID, to-tag, and from-tag
information for the target dialog in a single Replaces header field
and sends the new INVITE to the target.*/
from_tag=belle_sip_dialog_get_local_tag(other_call_op->dialog);
to_tag=belle_sip_dialog_get_remote_tag(other_call_op->dialog);
replaces=belle_sip_header_replaces_create(belle_sip_header_call_id_get_call_id(belle_sip_dialog_get_call_id(other_call_op->dialog))
,from_tag,to_tag);
escaped_replaces=belle_sip_header_replaces_value_to_escaped_string(replaces);
belle_sip_uri_set_header(belle_sip_header_address_get_uri(BELLE_SIP_HEADER_ADDRESS(refer_to)),"Replaces",escaped_replaces);
belle_sip_free(escaped_replaces);
referred_by=belle_sip_header_referred_by_create(belle_sip_dialog_get_local_party(op->dialog));
belle_sip_parameters_clean(BELLE_SIP_PARAMETERS(referred_by));
return sal_call_refer_to(op,refer_to,referred_by);
}
static int sal_op_check_dialog_state(SalOp *op) {
belle_sip_dialog_state_t state=op->dialog?belle_sip_dialog_get_state(op->dialog): BELLE_SIP_DIALOG_NULL;
if (state != BELLE_SIP_DIALOG_CONFIRMED) {
ms_warning("Cannot notify presence for op [%p] because dialog in state [%s]",op, belle_sip_dialog_state_to_string(state));
return -1;
} else
return 0;
}
static void presence_process_request_event(void *op_base, const belle_sip_request_event_t *event) {
SalOp* op = (SalOp*)op_base;
belle_sip_server_transaction_t* server_transaction = belle_sip_provider_create_server_transaction(op->base.root->prov,belle_sip_request_event_get_request(event));
belle_sip_request_t* req = belle_sip_request_event_get_request(event);
belle_sip_dialog_state_t dialog_state;
belle_sip_header_expires_t* expires = belle_sip_message_get_header_by_type(req,belle_sip_header_expires_t);
belle_sip_response_t* resp;
const char *method=belle_sip_request_get_method(req);
belle_sip_object_ref(server_transaction);
if (op->pending_server_trans) belle_sip_object_unref(op->pending_server_trans);
op->pending_server_trans=server_transaction;
if (!op->dialog) {
if (strcmp(method,"SUBSCRIBE")==0){
op->dialog=belle_sip_provider_create_dialog(op->base.root->prov,BELLE_SIP_TRANSACTION(server_transaction));
belle_sip_dialog_set_application_data(op->dialog,op);
sal_op_ref(op);
ms_message("new incoming subscription from [%s] to [%s]",sal_op_get_from(op),sal_op_get_to(op));
}else{ /* this is a NOTIFY */
ms_message("Receiving out of dialog notify");
handle_notify(op,req);
return;
}
}
dialog_state=belle_sip_dialog_get_state(op->dialog);
switch(dialog_state) {
case BELLE_SIP_DIALOG_NULL: {
op->base.root->callbacks.subscribe_presence_received(op,sal_op_get_from(op));
break;
}
case BELLE_SIP_DIALOG_EARLY:
ms_error("unexpected method [%s] for dialog [%p] in state BELLE_SIP_DIALOG_EARLY ",method,op->dialog);
break;
case BELLE_SIP_DIALOG_CONFIRMED:
if (strcmp("NOTIFY",method)==0) {
handle_notify(op,req);
} else if (strcmp("SUBSCRIBE",method)==0) {
/*either a refresh or an unsubscribe*/
if (expires && belle_sip_header_expires_get_expires(expires)>0) {
op->base.root->callbacks.subscribe_presence_received(op,sal_op_get_from(op));
} else if(expires) {
ms_message("Unsubscribe received from [%s]",sal_op_get_from(op));
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
}
}
break;
default:
ms_error("unexpected dialog state [%s]",belle_sip_dialog_state_to_string(dialog_state));
break;
}
}
static void callee_process_request_event(void *user_ctx, const belle_sip_request_event_t *event) {
belle_sip_dialog_t* dialog;
belle_sip_response_t* ringing_response;
belle_sip_header_content_type_t* content_type ;
belle_sip_header_content_length_t* content_length;
belle_sip_server_transaction_t* server_transaction = belle_sip_request_event_get_server_transaction(event);
belle_sip_header_to_t* to=belle_sip_message_get_header_by_type(belle_sip_request_event_get_request(event),belle_sip_header_to_t);
const char* method;
if (!belle_sip_uri_equals(BELLE_SIP_URI(user_ctx),belle_sip_header_address_get_uri(BELLE_SIP_HEADER_ADDRESS(to)))) {
belle_sip_message("Message [%p] not for callee, skipping",belle_sip_request_event_get_request(event));
return; /*not for the callee*/
}
method = belle_sip_request_get_method(belle_sip_request_event_get_request(event));
if (!server_transaction && strcmp(method,"ACK")!=0) {
server_transaction= belle_sip_provider_create_server_transaction(prov,belle_sip_request_event_get_request(event));
}
belle_sip_message("callee_process_request_event received [%s] message",method);
dialog = belle_sip_request_event_get_dialog(event);
if (!dialog ) {
BC_ASSERT_STRING_EQUAL_FATAL("INVITE",method);
dialog=belle_sip_provider_create_dialog(prov,BELLE_SIP_TRANSACTION(server_transaction));
callee_dialog=dialog;
inserv_transaction=server_transaction;
}
if (belle_sip_dialog_get_state(dialog) == BELLE_SIP_DIALOG_NULL) {
ringing_response = belle_sip_response_create_from_request(belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(server_transaction)),180);
/*prepare 200ok*/
ok_response = belle_sip_response_create_from_request(belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(server_transaction)),200);
content_length= belle_sip_header_content_length_create(strlen(sdp));
content_type = belle_sip_header_content_type_create("application","sdp");
belle_sip_message_add_header(BELLE_SIP_MESSAGE(ok_response),BELLE_SIP_HEADER(content_type));
belle_sip_message_add_header(BELLE_SIP_MESSAGE(ok_response),BELLE_SIP_HEADER(content_length));
belle_sip_message_set_body(BELLE_SIP_MESSAGE(ok_response),sdp,strlen(sdp));
belle_sip_object_ref(ok_response);
/*only send ringing*/
belle_sip_server_transaction_send_response(server_transaction,ringing_response);
} else if (belle_sip_dialog_get_state(dialog) == BELLE_SIP_DIALOG_CONFIRMED) {
/*time to send bye*/
belle_sip_client_transaction_t* client_transaction = belle_sip_provider_create_client_transaction(prov,belle_sip_dialog_create_request(dialog,"BYE"));
belle_sip_client_transaction_send_request(client_transaction);
} else {
belle_sip_warning("Unexpected state [%s] for dialog [%p]",belle_sip_dialog_state_to_string(belle_sip_dialog_get_state(dialog)),dialog );
}
}
int sal_call_terminate(SalOp *op){
belle_sip_dialog_state_t dialog_state=op->dialog?belle_sip_dialog_get_state(op->dialog):BELLE_SIP_DIALOG_NULL;
if (op->state==SalOpStateTerminating || op->state==SalOpStateTerminated) {
ms_error("Cannot terminate op [%p] in state [%s]",op,sal_op_state_to_string(op->state));
return -1;
}
switch(dialog_state) {
case BELLE_SIP_DIALOG_CONFIRMED: {
sal_op_send_request(op,belle_sip_dialog_create_request(op->dialog,"BYE"));
op->state=SalOpStateTerminating;
break;
}
case BELLE_SIP_DIALOG_NULL: {
if (op->dir == SalOpDirIncoming) {
sal_call_decline(op, SalReasonDeclined,NULL);
op->state=SalOpStateTerminated;
} else if (op->pending_client_trans){
if (belle_sip_transaction_get_state(BELLE_SIP_TRANSACTION(op->pending_client_trans)) == BELLE_SIP_TRANSACTION_PROCEEDING){
cancelling_invite(op);
}else{
/* Case where the CANCEL cannot be sent because no provisional response was received so far.
* The Op must be kept for the time of the transaction in case a response is received later.
* The state is passed to Terminating to remember to terminate later.
*/
op->state=SalOpStateTerminating;
}
}
break;
}
case BELLE_SIP_DIALOG_EARLY: {
if (op->dir == SalOpDirIncoming) {
sal_call_decline(op, SalReasonDeclined,NULL);
op->state=SalOpStateTerminated;
} else {
cancelling_invite(op);
}
break;
}
default: {
ms_error("sal_call_terminate not implemented yet for dialog state [%s]",belle_sip_dialog_state_to_string(dialog_state));
return -1;
}
}
return 0;
}
int sal_call_update(SalOp *op, const char *subject, bool_t no_user_consent){
belle_sip_request_t *update;
belle_sip_dialog_state_t state=belle_sip_dialog_get_state(op->dialog);
/*check for dialog state*/
if ( state == BELLE_SIP_DIALOG_CONFIRMED) {
if (no_user_consent)
update=belle_sip_dialog_create_request(op->dialog,"UPDATE");
else
update=belle_sip_dialog_create_request(op->dialog,"INVITE");
} else if (state == BELLE_SIP_DIALOG_EARLY) {
update=belle_sip_dialog_create_request(op->dialog,"UPDATE");
} else {
ms_error("Cannot update op [%p] with dialog [%p] in state [%s]",op, op->dialog,belle_sip_dialog_state_to_string(state));
return -1;
}
if (update){
belle_sip_message_add_header(BELLE_SIP_MESSAGE(update),belle_sip_header_create( "Subject", subject));
sal_op_fill_invite(op, update);
return sal_op_send_request(op,update);
}
return -1;
}
int sal_call_refer_with_replaces(SalOp *op, SalOp *other_call_op){
belle_sip_dialog_state_t other_call_dialog_state=other_call_op->dialog?belle_sip_dialog_get_state(other_call_op->dialog):BELLE_SIP_DIALOG_NULL;
belle_sip_dialog_state_t op_dialog_state=op->dialog?belle_sip_dialog_get_state(op->dialog):BELLE_SIP_DIALOG_NULL;
belle_sip_header_replaces_t* replaces;
belle_sip_header_refer_to_t* refer_to;
belle_sip_header_referred_by_t* referred_by;
const char* from_tag;
const char* to_tag;
char* escaped_replaces;
/*first, build refer to*/
if (other_call_dialog_state!=BELLE_SIP_DIALOG_CONFIRMED) {
ms_error(" wrong dialog state [%s] for op [%p], should be BELLE_SIP_DIALOG_CONFIRMED",belle_sip_dialog_state_to_string(other_call_dialog_state)
,other_call_op);
return -1;
}
if (op_dialog_state!=BELLE_SIP_DIALOG_CONFIRMED) {
ms_error(" wrong dialog state [%s] for op [%p], should be BELLE_SIP_DIALOG_CONFIRMED",belle_sip_dialog_state_to_string(op_dialog_state)
,op);
return -1;
}
refer_to=belle_sip_header_refer_to_create(belle_sip_dialog_get_remote_party(other_call_op->dialog));
belle_sip_parameters_clean(BELLE_SIP_PARAMETERS(refer_to));
if (belle_sip_dialog_is_server(other_call_op->dialog)) {
to_tag=belle_sip_dialog_get_local_tag(other_call_op->dialog);
from_tag=belle_sip_dialog_get_remote_tag(other_call_op->dialog);;
} else {
from_tag=belle_sip_dialog_get_local_tag(other_call_op->dialog);
to_tag=belle_sip_dialog_get_remote_tag(other_call_op->dialog);;
}
replaces=belle_sip_header_replaces_create(belle_sip_header_call_id_get_call_id(belle_sip_dialog_get_call_id(other_call_op->dialog))
,from_tag,to_tag);
escaped_replaces=belle_sip_header_replaces_value_to_escaped_string(replaces);
belle_sip_uri_set_header(belle_sip_header_address_get_uri(BELLE_SIP_HEADER_ADDRESS(refer_to)),"Replaces",escaped_replaces);
belle_sip_free(escaped_replaces);
referred_by=belle_sip_header_referred_by_create(belle_sip_dialog_get_local_party(op->dialog));
belle_sip_parameters_clean(BELLE_SIP_PARAMETERS(referred_by));
return sal_call_refer_to(op,refer_to,referred_by);
}
static void process_request_event(void *op_base, const belle_sip_request_event_t *event) {
SalOp* op = (SalOp*)op_base;
belle_sip_server_transaction_t* server_transaction=NULL;
belle_sdp_session_description_t* sdp;
belle_sip_request_t* req = belle_sip_request_event_get_request(event);
belle_sip_dialog_state_t dialog_state;
belle_sip_response_t* resp;
belle_sip_header_t* call_info;
const char *method=belle_sip_request_get_method(req);
bool_t is_update=FALSE;
if (strcmp("ACK",method)!=0){ /*ACK does'nt create srv transaction*/
server_transaction = belle_sip_provider_create_server_transaction(op->base.root->prov,belle_sip_request_event_get_request(event));
belle_sip_object_ref(server_transaction);
belle_sip_transaction_set_application_data(BELLE_SIP_TRANSACTION(server_transaction),sal_op_ref(op));
}
if (strcmp("INVITE",method)==0) {
if (op->pending_server_trans) belle_sip_object_unref(op->pending_server_trans);
/*updating pending invite transaction*/
op->pending_server_trans=server_transaction;
belle_sip_object_ref(op->pending_server_trans);
}
if (strcmp("UPDATE",method)==0) {
if (op->pending_update_server_trans) belle_sip_object_unref(op->pending_update_server_trans);
/*updating pending update transaction*/
op->pending_update_server_trans=server_transaction;
belle_sip_object_ref(op->pending_update_server_trans);
}
if (!op->dialog) {
set_or_update_dialog(op,belle_sip_provider_create_dialog(op->base.root->prov,BELLE_SIP_TRANSACTION(op->pending_server_trans)));
ms_message("new incoming call from [%s] to [%s]",sal_op_get_from(op),sal_op_get_to(op));
}
dialog_state=belle_sip_dialog_get_state(op->dialog);
switch(dialog_state) {
case BELLE_SIP_DIALOG_NULL: {
if (strcmp("INVITE",method)==0) {
if (!op->replaces && (op->replaces=belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(req),belle_sip_header_replaces_t))) {
belle_sip_object_ref(op->replaces);
} else if(op->replaces) {
ms_warning("replace header already set");
}
if (process_sdp_for_invite(op,req) == 0) {
if ((call_info=belle_sip_message_get_header(BELLE_SIP_MESSAGE(req),"Call-Info"))) {
if( strstr(belle_sip_header_get_unparsed_value(call_info),"answer-after=") != NULL) {
op->auto_answer_asked=TRUE;
ms_message("The caller asked to automatically answer the call(Emergency?)\n");
}
}
op->base.root->callbacks.call_received(op);
}
break;
} /* else same behavior as for EARLY state*/
}
case BELLE_SIP_DIALOG_EARLY: {
//hmm probably a cancel
if (strcmp("CANCEL",method)==0) {
if(belle_sip_request_event_get_server_transaction(event)) {
/*first answer 200 ok to cancel*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,200));
/*terminate invite transaction*/
call_terminated(op
,op->pending_server_trans
,belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(op->pending_server_trans)),487);
} else {
/*call leg does not exist*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,481));
}
} else if (strcmp("PRACK",method)==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else if (strcmp("UPDATE",method)==0) {
sal_op_reset_descriptions(op);
if (process_sdp_for_invite(op,req)==0)
op->base.root->callbacks.call_updating(op,TRUE);
} else {
belle_sip_error("Unexpected method [%s] for dialog state BELLE_SIP_DIALOG_EARLY",belle_sip_request_get_method(req));
unsupported_method(server_transaction,req);
}
break;
}
case BELLE_SIP_DIALOG_CONFIRMED:
/*great ACK received*/
if (strcmp("ACK",method)==0) {
if (op->sdp_offering){
SalReason reason;
if (extract_sdp(op,BELLE_SIP_MESSAGE(req),&sdp,&reason)==0){
if (sdp){
if (op->base.remote_media)
sal_media_description_unref(op->base.remote_media);
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
sdp_process(op);
belle_sip_object_unref(sdp);
}else{
ms_warning("SDP expected in ACK but not found.");
}
}
}
op->base.root->callbacks.call_ack(op);
} else if(strcmp("BYE",method)==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
op->base.root->callbacks.call_terminated(op,op->dir==SalOpDirIncoming?sal_op_get_from(op):sal_op_get_to(op));
op->state=SalOpStateTerminating;
/*call end not notified by dialog deletion because transaction can end before dialog*/
} else if(strcmp("INVITE",method)==0 || (is_update=(strcmp("UPDATE",method)==0)) ) {
if (is_update && !belle_sip_message_get_body(BELLE_SIP_MESSAGE(req))) {
/*session timer case*/
/*session expire should be handled. to be done when real session timer (rfc4028) will be implemented*/
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
belle_sip_object_unref(op->pending_update_server_trans);
op->pending_update_server_trans=NULL;
} else {
/*re-invite*/
sal_op_reset_descriptions(op);
if (process_sdp_for_invite(op,req)==0)
op->base.root->callbacks.call_updating(op,is_update);
}
} else if (strcmp("INFO",method)==0){
if (belle_sip_message_get_body(BELLE_SIP_MESSAGE(req))
&& strstr(belle_sip_message_get_body(BELLE_SIP_MESSAGE(req)),"picture_fast_update")) {
/*vfu request*/
ms_message("Receiving VFU request on op [%p]",op);
if (op->base.root->callbacks.vfu_request){
op->base.root->callbacks.vfu_request(op);
}
}else{
SalBody salbody;
if (sal_op_get_body(op,(belle_sip_message_t*)req,&salbody)) {
if (sal_body_has_type(&salbody,"application","dtmf-relay")){
char tmp[10];
if (sal_lines_get_value(salbody.data, "Signal",tmp, sizeof(tmp))){
op->base.root->callbacks.dtmf_received(op,tmp[0]);
}
}else
op->base.root->callbacks.info_received(op,&salbody);
} else {
op->base.root->callbacks.info_received(op,NULL);
}
}
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
}else if (strcmp("REFER",method)==0) {
sal_op_process_refer(op,event,server_transaction);
} else if (strcmp("NOTIFY",method)==0) {
sal_op_call_process_notify(op,event,server_transaction);
} else if (strcmp("OPTIONS",method)==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else if (strcmp("CANCEL",method)==0) {
/*call leg does not exist because 200ok already sent*/
belle_sip_server_transaction_send_response(server_transaction,sal_op_create_response_from_request(op,req,481));
} else if (strcmp("MESSAGE",method)==0){
sal_process_incoming_message(op,event);
}else{
ms_error("unexpected method [%s] for dialog [%p]",belle_sip_request_get_method(req),op->dialog);
unsupported_method(server_transaction,req);
}
break;
default:
ms_error("unexpected dialog state [%s]",belle_sip_dialog_state_to_string(dialog_state));
break;
}
if (server_transaction) belle_sip_object_unref(server_transaction);
}
static void call_process_response(void *op_base, const belle_sip_response_event_t *event){
SalOp* op = (SalOp*)op_base;
belle_sip_request_t* ack;
belle_sip_dialog_state_t dialog_state;
belle_sip_client_transaction_t* client_transaction = belle_sip_response_event_get_client_transaction(event);
belle_sip_request_t* req;
belle_sip_response_t* response=belle_sip_response_event_get_response(event);
int code = belle_sip_response_get_status_code(response);
belle_sip_header_content_type_t *header_content_type=NULL;
belle_sip_dialog_t *dialog=belle_sip_response_event_get_dialog(event);
const char *method;
if (!client_transaction) {
ms_warning("Discarding stateless response [%i] on op [%p]",code,op);
return;
}
req=belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(client_transaction));
set_or_update_dialog(op,dialog);
dialog_state=dialog ? belle_sip_dialog_get_state(dialog) : BELLE_SIP_DIALOG_NULL;
method=belle_sip_request_get_method(req);
ms_message("Op [%p] receiving call response [%i], dialog is [%p] in state [%s]",op,code,dialog,belle_sip_dialog_state_to_string(dialog_state));
/*to make sure no cb will destroy op*/
sal_op_ref(op);
switch(dialog_state) {
case BELLE_SIP_DIALOG_NULL:
case BELLE_SIP_DIALOG_EARLY: {
if (strcmp("INVITE",method)==0 ) {
if (op->state == SalOpStateTerminating) {
/*check if CANCEL was sent before*/
if (strcmp("CANCEL",belle_sip_request_get_method(belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(op->pending_client_trans))))!=0) {
/*it wasn't sent */
if (code<200) {
cancelling_invite(op);
}else{
/* no need to send the INVITE because the UAS rejected the INVITE*/
if (op->dialog==NULL) call_set_released(op);
}
} else {
/*it was sent already, so just expect the 487 or any error response to send the call_released() notification*/
if (code>=300){
if (op->dialog==NULL) call_set_released(op);
}
}
} else if (code >= 180 && code<200) {
belle_sip_response_t *prev_response=belle_sip_object_data_get(BELLE_SIP_OBJECT(dialog),"early_response");
if (!prev_response || code>belle_sip_response_get_status_code(prev_response)){
handle_sdp_from_response(op,response);
op->base.root->callbacks.call_ringing(op);
}
belle_sip_object_data_set(BELLE_SIP_OBJECT(dialog),"early_response",belle_sip_object_ref(response),belle_sip_object_unref);
} else if (code>=300){
call_set_error(op,response);
if (op->dialog==NULL) call_set_released(op);
}
} else if (code >=200
&& code<300
&& strcmp("UPDATE",belle_sip_request_get_method(req))==0) {
handle_sdp_from_response(op,response);
op->base.root->callbacks.call_accepted(op);
}
}
break;
case BELLE_SIP_DIALOG_CONFIRMED: {
switch (op->state) {
case SalOpStateEarly:/*invite case*/
case SalOpStateActive: /*re-invite, INFO, UPDATE case*/
if (strcmp("INVITE",method)==0){
if (code >=200 && code<300) {
handle_sdp_from_response(op,response);
ack=belle_sip_dialog_create_ack(op->dialog,belle_sip_dialog_get_local_seq_number(op->dialog));
if (ack==NULL) {
ms_error("This call has been already terminated.");
return ;
}
if (op->sdp_answer){
set_sdp(BELLE_SIP_MESSAGE(ack),op->sdp_answer);
belle_sip_object_unref(op->sdp_answer);
op->sdp_answer=NULL;
}
belle_sip_dialog_send_ack(op->dialog,ack);
op->base.root->callbacks.call_accepted(op); /*INVITE*/
op->state=SalOpStateActive;
}else if (code >= 300){
call_set_error(op,response);
}
}else if (strcmp("INFO",method)==0){
if (code == 491
&& (header_content_type = belle_sip_message_get_header_by_type(req,belle_sip_header_content_type_t))
&& strcmp("application",belle_sip_header_content_type_get_type(header_content_type))==0
&& strcmp("media_control+xml",belle_sip_header_content_type_get_subtype(header_content_type))==0) {
unsigned int retry_in =1000*((float)rand()/RAND_MAX);
belle_sip_source_t *s=sal_create_timer(op->base.root,vfu_retry,sal_op_ref(op), retry_in, "vfu request retry");
ms_message("Rejected vfu request on op [%p], just retry in [%ui] ms",op,retry_in);
belle_sip_object_unref(s);
}else {
/*ignoring*/
}
}else if (strcmp("UPDATE",method)==0){
op->base.root->callbacks.call_accepted(op); /*INVITE*/
}
break;
case SalOpStateTerminating:
sal_op_send_request(op,belle_sip_dialog_create_request(op->dialog,"BYE"));
break;
case SalOpStateTerminated:
default:
ms_error("Call op [%p] receives unexpected answer [%i] while in state [%s].",op,code, sal_op_state_to_string(op->state));
}
}
break;
case BELLE_SIP_DIALOG_TERMINATED: {
if (code >= 300){
call_set_error(op,response);
}
}
break;
default: {
ms_error("call op [%p] receive answer [%i] not implemented",op,code);
}
break;
}
sal_op_unref(op);
}
static int belle_sip_refresher_refresh_internal(belle_sip_refresher_t* refresher, int expires, int auth_mandatory, belle_sip_list_t** auth_infos, belle_sip_uri_t *requri) {
belle_sip_request_t*old_request=belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(refresher->transaction));
belle_sip_response_t*old_response=belle_sip_transaction_get_response(BELLE_SIP_TRANSACTION(refresher->transaction));
belle_sip_dialog_t* dialog = refresher->dialog;
belle_sip_client_transaction_t* client_transaction;
belle_sip_request_t* request;
belle_sip_header_expires_t* expires_header;
belle_sip_uri_t* preset_route=refresher->transaction->preset_route;
belle_sip_provider_t* prov=refresher->transaction->base.provider;
belle_sip_header_contact_t* contact;
/*first remove timer if any*/
if (expires >=0) {
refresher->target_expires=expires;
} else {
/*-1 keep last value*/
}
if (!dialog) {
const belle_sip_transaction_state_t state=belle_sip_transaction_get_state(BELLE_SIP_TRANSACTION(refresher->transaction));
/*create new request*/
if (belle_sip_transaction_state_is_transient(state)) {
/*operation pending, cannot update authorization headers*/
belle_sip_header_cseq_t* cseq;
belle_sip_message("Refresher [%p] already has transaction [%p] in state [%s]" ,refresher
,refresher->transaction
,belle_sip_transaction_state_to_string(state));
if (strcmp(belle_sip_request_get_method(old_request),"PUBLISH")==0) {
belle_sip_message("Refresher [%p] new publish is delayed to end of ongoing transaction" ,refresher);
refresher->publish_pending = TRUE;
return 0;
} else {
request=belle_sip_request_clone_with_body(belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(refresher->transaction)));
cseq=belle_sip_message_get_header_by_type(request,belle_sip_header_cseq_t);
belle_sip_header_cseq_set_seq_number(cseq,belle_sip_header_cseq_get_seq_number(cseq)+1);
}
} else {
request=belle_sip_client_transaction_create_authenticated_request(refresher->transaction,auth_infos,refresher->realm);
}
if (requri){
/*case where we are redirected*/
belle_sip_request_set_uri(request,requri);
/*remove auth headers, they are not valid for new destination*/
belle_sip_message_remove_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_AUTHORIZATION);
belle_sip_message_remove_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_PROXY_AUTHORIZATION);
}
} else {
switch (belle_sip_dialog_get_state(dialog)) {
case BELLE_SIP_DIALOG_CONFIRMED: {
if (belle_sip_dialog_request_pending(dialog)){
belle_sip_message("Cannot refresh now, there is a pending request in the dialog.");
return -1;
}
request=belle_sip_dialog_create_request_from(dialog,old_request);
if (strcmp(belle_sip_request_get_method(request),"SUBSCRIBE")==0) {
belle_sip_header_content_type_t *content_type;
/*put expire header*/
if (!(expires_header = belle_sip_message_get_header_by_type(request,belle_sip_header_expires_t))) {
expires_header = belle_sip_header_expires_new();
belle_sip_message_add_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_HEADER(expires_header));
}
if ((content_type = belle_sip_message_get_header_by_type(request, belle_sip_header_content_type_t))
&& strcasecmp("application", belle_sip_header_content_type_get_type(content_type)) == 0
&& strcasecmp("resource-lists+xml", belle_sip_header_content_type_get_subtype(content_type)) == 0) {
/*rfc5367
3.2. Subsequent SUBSCRIBE Requests
...
At this point, there are no semantics associated with resource-list
bodies in subsequent SUBSCRIBE requests (although future extensions
can define them). Therefore, UACs SHOULD NOT include resource-list
bodies in subsequent SUBSCRIBE requests to a resource list server.
*/
belle_sip_message("Removing body, content type and content length for refresher [%p]",refresher);
belle_sip_message_set_body(BELLE_SIP_MESSAGE(request), NULL, 0);
belle_sip_message_remove_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_CONTENT_TYPE);
belle_sip_message_remove_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_CONTENT_LENGTH);
}
}
belle_sip_provider_add_authorization(prov,request,old_response,NULL,auth_infos,refresher->realm);
break;
}
case BELLE_SIP_DIALOG_TERMINATED: {
if (refresher->first_acknoleged_request) {
char tmp[11];
belle_sip_message("Dialog [%p] is in state terminated, recreating a new one for refresher [%p]",dialog,refresher);
request = refresher->first_acknoleged_request;
belle_sip_header_cseq_set_seq_number(belle_sip_message_get_header_by_type(request,belle_sip_header_cseq_t)
,20);
belle_sip_parameters_remove_parameter(BELLE_SIP_PARAMETERS(belle_sip_message_get_header_by_type(request,belle_sip_header_to_t)),"tag");
belle_sip_header_call_id_set_call_id( belle_sip_message_get_header_by_type(request,belle_sip_header_call_id_t)
, belle_sip_random_token(tmp,sizeof(tmp)));
break;
} /*else nop, error case*/
}
default: {
belle_sip_error("Unexpected dialog state [%s] for dialog [%p], cannot refresh [%s]"
,belle_sip_dialog_state_to_string(belle_sip_dialog_get_state(dialog))
,dialog
,belle_sip_request_get_method(old_request));
return -1;
}
}
}
if (auth_mandatory && auth_infos && belle_sip_list_find_custom(*auth_infos, unfilled_auth_info, NULL)) {
belle_sip_message("Auth info not found for this refresh operation on [%p]",refresher);
if (request) belle_sip_object_unref(request);
return -1;
}
refresher->on_io_error=0; /*reset this flag*/
/*update expires in any cases*/
expires_header = belle_sip_message_get_header_by_type(request,belle_sip_header_expires_t);
if (expires_header)
belle_sip_header_expires_set_expires(expires_header,refresher->target_expires);
contact=belle_sip_message_get_header_by_type(request,belle_sip_header_contact_t);
if (contact && belle_sip_header_contact_get_expires(contact)>=0)
belle_sip_header_contact_set_expires(contact,refresher->target_expires);
/*update the Date header if it exists*/
{
belle_sip_header_date_t *date=belle_sip_message_get_header_by_type(request,belle_sip_header_date_t);
if (date){
time_t curtime=time(NULL);
belle_sip_header_date_set_time(date,&curtime);
}
}
client_transaction = belle_sip_provider_create_client_transaction(prov,request);
client_transaction->base.is_internal=1;
belle_sip_transaction_set_application_data(BELLE_SIP_TRANSACTION(client_transaction),refresher);
if (request == refresher->first_acknoleged_request) { /*request is now ref by transaction so no need to keepo it*/
belle_sip_object_unref(refresher->first_acknoleged_request);
refresher->first_acknoleged_request = NULL;
}
switch (belle_sip_transaction_get_state(BELLE_SIP_TRANSACTION(refresher->transaction))) {
case BELLE_SIP_TRANSACTION_INIT:
case BELLE_SIP_TRANSACTION_CALLING:
case BELLE_SIP_TRANSACTION_TRYING:
/*very early state, we can assume nobody will answer, stop retransmiting*/
belle_sip_transaction_terminate(BELLE_SIP_TRANSACTION(refresher->transaction));
break;
default: /*we preserve the transaction "as is"*/
break;
}
/*update reference transaction for next refresh*/
belle_sip_object_unref(refresher->transaction);
refresher->transaction=client_transaction;
belle_sip_object_ref(refresher->transaction);
if (belle_sip_client_transaction_send_request_to(client_transaction,requri?requri:preset_route)) { /*send imediatly to requri in case of redirect*/
belle_sip_error("Cannot send refresh method [%s] for refresher [%p]"
,belle_sip_request_get_method(request)
,refresher);
return -1;
}
if (expires==0) belle_sip_refresher_stop_internal(refresher,0); /*unregister transaction must be preserved*/
return 0;
}
belle_sip_request_t *belle_sip_dialog_create_request(belle_sip_dialog_t *obj, const char *method){
belle_sip_request_t *req;
if (obj->state != BELLE_SIP_DIALOG_CONFIRMED && obj->state != BELLE_SIP_DIALOG_EARLY) {
belle_sip_error("belle_sip_dialog_create_request(): cannot create [%s] request from dialog [%p] in state [%s]",method,obj,belle_sip_dialog_state_to_string(obj->state));
return NULL;
}
/*don't prevent to send a BYE in any case */
if (strcmp(method,"BYE")!=0 && obj->last_transaction && belle_sip_transaction_state_is_transient(belle_sip_transaction_get_state(obj->last_transaction))){
if (obj->state != BELLE_SIP_DIALOG_EARLY && strcmp(method,"UPDATE")!=0) {
belle_sip_error("belle_sip_dialog_create_request(): cannot create [%s] request from dialog [%p] while pending [%s] transaction in state [%s]",method,obj,belle_sip_transaction_get_method(obj->last_transaction), belle_sip_transaction_state_to_string(belle_sip_transaction_get_state(obj->last_transaction)));
return NULL;
} /*else UPDATE transaction can be send in // */
}
belle_sip_dialog_update_local_cseq(obj,method);
req=create_request(obj,method,TRUE);
return req;
}
static void process_request_event(void *op_base, const belle_sip_request_event_t *event) {
SalOp* op = (SalOp*)op_base;
belle_sip_server_transaction_t* server_transaction=NULL;
belle_sdp_session_description_t* sdp;
belle_sip_request_t* req = belle_sip_request_event_get_request(event);
belle_sip_dialog_state_t dialog_state;
belle_sip_response_t* resp;
belle_sip_header_t* call_info;
if (strcmp("ACK",belle_sip_request_get_method(req))!=0){ /*ACK does'nt create srv transaction*/
server_transaction = belle_sip_provider_create_server_transaction(op->base.root->prov,belle_sip_request_event_get_request(event));
belle_sip_object_ref(server_transaction);
belle_sip_transaction_set_application_data(BELLE_SIP_TRANSACTION(server_transaction),op);
sal_op_ref(op);
}
if (strcmp("INVITE",belle_sip_request_get_method(req))==0) {
if (op->pending_server_trans) belle_sip_object_unref(op->pending_server_trans);
/*updating pending invite transaction*/
op->pending_server_trans=server_transaction;
belle_sip_object_ref(op->pending_server_trans);
}
if (!op->dialog) {
set_or_update_dialog(op,belle_sip_provider_create_dialog(op->base.root->prov,BELLE_SIP_TRANSACTION(op->pending_server_trans)));
ms_message("new incoming call from [%s] to [%s]",sal_op_get_from(op),sal_op_get_to(op));
}
dialog_state=belle_sip_dialog_get_state(op->dialog);
switch(dialog_state) {
case BELLE_SIP_DIALOG_NULL: {
if (strcmp("INVITE",belle_sip_request_get_method(req))==0) {
if (!op->replaces && (op->replaces=belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(req),belle_sip_header_replaces_t))) {
belle_sip_object_ref(op->replaces);
} else if(op->replaces) {
ms_warning("replace header already set");
}
process_sdp_for_invite(op,req);
if ((call_info=belle_sip_message_get_header(BELLE_SIP_MESSAGE(req),"Call-Info"))) {
if( strstr(belle_sip_header_extension_get_value(BELLE_SIP_HEADER_EXTENSION(call_info)),"answer-after=") != NULL) {
op->auto_answer_asked=TRUE;
ms_message("The caller asked to automatically answer the call(Emergency?)\n");
}
}
op->base.root->callbacks.call_received(op);
break;
} /* else same behavior as for EARLY state*/
}
case BELLE_SIP_DIALOG_EARLY: {
//hmm probably a cancel
if (strcmp("CANCEL",belle_sip_request_get_method(req))==0) {
if(belle_sip_request_event_get_server_transaction(event)) {
/*first answer 200 ok to cancel*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,200));
/*terminate invite transaction*/
call_terminated(op
,op->pending_server_trans
,belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(op->pending_server_trans)),487);
} else {
/*call leg does not exist*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,481));
}
} else if (strcmp("PRACK",belle_sip_request_get_method(req))==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else {
belle_sip_error("Unexpected method [%s] for dialog state BELLE_SIP_DIALOG_EARLY",belle_sip_request_get_method(req));
unsupported_method(server_transaction,req);
}
break;
}
case BELLE_SIP_DIALOG_CONFIRMED:
/*great ACK received*/
if (strcmp("ACK",belle_sip_request_get_method(req))==0) {
if (op->sdp_offering){
if ((sdp=belle_sdp_session_description_create(BELLE_SIP_MESSAGE(req)))){
if (op->base.remote_media)
sal_media_description_unref(op->base.remote_media);
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
sdp_process(op);
belle_sip_object_unref(sdp);
}
}
/*FIXME
if (op->reinvite){
op->reinvite=FALSE;
}*/
op->base.root->callbacks.call_ack(op);
} else if(strcmp("BYE",belle_sip_request_get_method(req))==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
op->base.root->callbacks.call_terminated(op,op->dir==SalOpDirIncoming?sal_op_get_from(op):sal_op_get_to(op));
op->state=SalOpStateTerminating;
/*call end not notified by dialog deletion because transaction can end before dialog*/
} else if(strcmp("INVITE",belle_sip_request_get_method(req))==0) {
/*re-invite*/
if (op->base.remote_media){
sal_media_description_unref(op->base.remote_media);
op->base.remote_media=NULL;
}
if (op->result){
sal_media_description_unref(op->result);
op->result=NULL;
}
process_sdp_for_invite(op,req);
op->base.root->callbacks.call_updating(op);
} else if (strcmp("INFO",belle_sip_request_get_method(req))==0){
if (belle_sip_message_get_body(BELLE_SIP_MESSAGE(req))
&& strstr(belle_sip_message_get_body(BELLE_SIP_MESSAGE(req)),"picture_fast_update")) {
/*vfu request*/
ms_message("Receiving VFU request on op [%p]",op);
if (op->base.root->callbacks.vfu_request){
op->base.root->callbacks.vfu_request(op);
}
}else{
SalBody salbody;
if (sal_op_get_body(op,(belle_sip_message_t*)req,&salbody)) {
op->base.root->callbacks.info_received(op,&salbody);
} else {
op->base.root->callbacks.info_received(op,NULL);
}
}
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
}else if (strcmp("REFER",belle_sip_request_get_method(req))==0) {
sal_op_process_refer(op,event,server_transaction);
} else if (strcmp("NOTIFY",belle_sip_request_get_method(req))==0) {
sal_op_call_process_notify(op,event,server_transaction);
} else if (strcmp("OPTIONS",belle_sip_request_get_method(req))==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else if (strcmp("CANCEL",belle_sip_request_get_method(req))==0) {
/*call leg does not exist because 200ok already sent*/
belle_sip_server_transaction_send_response( server_transaction
,sal_op_create_response_from_request(op,req,481));
} else{
ms_error("unexpected method [%s] for dialog [%p]",belle_sip_request_get_method(req),op->dialog);
unsupported_method(server_transaction,req);
}
break;
default: {
ms_error("unexpected dialog state [%s]",belle_sip_dialog_state_to_string(dialog_state));
}
/* no break */
}
if (server_transaction) belle_sip_object_unref(server_transaction);
}
static void call_process_response(void *op_base, const belle_sip_response_event_t *event){
SalOp* op = (SalOp*)op_base;
belle_sip_request_t* ack;
belle_sip_dialog_state_t dialog_state;
belle_sip_client_transaction_t* client_transaction = belle_sip_response_event_get_client_transaction(event);
belle_sip_request_t* req;
belle_sip_response_t* response=belle_sip_response_event_get_response(event);
int code = belle_sip_response_get_status_code(response);
if (!client_transaction) {
ms_warning("Discarding stateless response [%i] on op [%p]",code,op);
return;
}
req=belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(client_transaction));
set_or_update_dialog(op,belle_sip_response_event_get_dialog(event));
dialog_state=op->dialog?belle_sip_dialog_get_state(op->dialog):BELLE_SIP_DIALOG_NULL;
ms_message("Op [%p] receiving call response [%i], dialog is [%p] in state [%s]",op,code,op->dialog,belle_sip_dialog_state_to_string(dialog_state));
switch(dialog_state) {
case BELLE_SIP_DIALOG_NULL:
case BELLE_SIP_DIALOG_EARLY: {
if (strcmp("INVITE",belle_sip_request_get_method(req))==0 ) {
if (op->state == SalOpStateTerminating) {
/*check if CANCEL was sent before*/
if (strcmp("CANCEL",belle_sip_request_get_method(belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(op->pending_client_trans))))!=0) {
/*it wasn't sent */
if (code<200) {
cancelling_invite(op);
}else{
/* no need to send the INVITE because the UAS rejected the INVITE*/
if (op->dialog==NULL) call_set_released(op);
}
} else {
/*it was sent already, so just expect the 487 or any error response to send the call_released() notification*/
if (code>=300){
if (op->dialog==NULL) call_set_released(op);
}
}
} else if (code >= 180 && code<300) {
handle_sdp_from_response(op,response);
op->base.root->callbacks.call_ringing(op);
} else if (code>=300){
call_set_error(op,response);
if (op->dialog==NULL) call_set_released(op);
}
}
}
break;
case BELLE_SIP_DIALOG_CONFIRMED: {
switch (op->state) {
case SalOpStateEarly:/*invite case*/
case SalOpStateActive: /*re-invite case*/
if (code >=200
&& code<300
&& strcmp("INVITE",belle_sip_request_get_method(req))==0) {
handle_sdp_from_response(op,response);
ack=belle_sip_dialog_create_ack(op->dialog,belle_sip_dialog_get_local_seq_number(op->dialog));
if (ack==NULL) {
ms_error("This call has been already terminated.");
return ;
}
if (op->sdp_answer){
set_sdp(BELLE_SIP_MESSAGE(ack),op->sdp_answer);
belle_sip_object_unref(op->sdp_answer);
op->sdp_answer=NULL;
}
belle_sip_dialog_send_ack(op->dialog,ack);
op->base.root->callbacks.call_accepted(op); /*INVITE*/
op->state=SalOpStateActive;
} else if (code >= 300 && strcmp("INVITE",belle_sip_request_get_method(req))==0){
call_set_error(op,response);
} else {
/*ignoring*/
}
break;
case SalOpStateTerminating:
sal_op_send_request(op,belle_sip_dialog_create_request(op->dialog,"BYE"));
break;
case SalOpStateTerminated:
default:
ms_error("Call op [%p] receives unexpected answer [%i] while in state [%s].",op,code, sal_op_state_to_string(op->state));
}
}
break;
case BELLE_SIP_DIALOG_TERMINATED: {
if (code >= 300){
call_set_error(op,response);
}
}
break;
default: {
ms_error("call op [%p] receive answer [%i] not implemented",op,code);
}
break;
}
}
