static void subscribe_process_dialog_terminated(void *ctx, const belle_sip_dialog_terminated_event_t *event) {
SalOp* op= (SalOp*)ctx;
if (op->dialog) {
op->dialog=NULL;
sal_op_unref(op);
}
}
int sal_op_send_and_create_refresher(SalOp* op,belle_sip_request_t* req, int expires,belle_sip_refresher_listener_t listener ) {
if (sal_op_send_request_with_expires(op,req,expires)==0) {
if (op->refresher) {
belle_sip_refresher_stop(op->refresher);
belle_sip_object_unref(op->refresher);
}
if ((op->refresher = belle_sip_client_transaction_create_refresher(op->pending_client_trans))) {
/*since refresher acquires the transaction, we should remove our context from the transaction, because we won't be notified
* that it is terminated anymore.*/
sal_op_unref(op);/*loose the reference that was given to the transaction when creating it*/
/* Note that the refresher will replace our data with belle_sip_transaction_set_application_data().
Something in the design is not very good here, it makes things complicated to the belle-sip user.
Possible ideas to improve things: refresher shall not use belle_sip_transaction_set_application_data() internally, refresher should let the first transaction
notify the user as a normal transaction*/
belle_sip_refresher_set_listener(op->refresher,listener,op);
belle_sip_refresher_set_retry_after(op->refresher,op->base.root->refresher_retry_after);
belle_sip_refresher_set_realm(op->refresher,op->base.realm);
belle_sip_refresher_enable_manual_mode(op->refresher,op->manual_refresher);
return 0;
} else {
return -1;
}
}
return -1;
}
void sal_op_release(SalOp *op){
/*if in terminating state, keep this state because it means we are waiting for a response to be able to terminate the operation.*/
if (op->state!=SalOpStateTerminating)
op->state=SalOpStateTerminated;
sal_op_set_user_pointer(op,NULL);/*mandatory because releasing op doesn't not mean freeing op. Make sure back pointer will not be used later*/
if (op->refresher) {
belle_sip_refresher_stop(op->refresher);
}
sal_op_unref(op);
}
static void register_refresher_listener (belle_sip_refresher_t* refresher
,void* user_pointer
,unsigned int status_code
,const char* reason_phrase) {
SalOp* op = (SalOp*)user_pointer;
belle_sip_response_t* response=belle_sip_transaction_get_response(BELLE_SIP_TRANSACTION(belle_sip_refresher_get_transaction(refresher)));
ms_message("Register refresher [%i] reason [%s] for proxy [%s]",status_code,reason_phrase,sal_op_get_proxy(op));
if (belle_sip_refresher_get_auth_events(refresher)) {
if (op->auth_info) sal_auth_info_delete(op->auth_info);
/*only take first one for now*/
op->auth_info=sal_auth_info_create((belle_sip_auth_event_t*)(belle_sip_refresher_get_auth_events(refresher)->data));
}
sal_error_info_set(&op->error_info,SalReasonUnknown,status_code,reason_phrase,NULL);
if (status_code>=200){
sal_op_assign_recv_headers(op,(belle_sip_message_t*)response);
}
if(status_code == 200) {
/*check service route rfc3608*/
belle_sip_header_service_route_t* service_route;
belle_sip_header_address_t* service_route_address=NULL;
belle_sip_header_contact_t *contact = belle_sip_refresher_get_contact(refresher);
if ((service_route=belle_sip_message_get_header_by_type(response,belle_sip_header_service_route_t))) {
service_route_address=belle_sip_header_address_create(NULL,belle_sip_header_address_get_uri(BELLE_SIP_HEADER_ADDRESS(service_route)));
}
sal_op_set_service_route(op,(const SalAddress*)service_route_address);
if (service_route_address) belle_sip_object_unref(service_route_address);
sal_remove_pending_auth(op->base.root,op); /*just in case*/
if (contact) {
sal_op_set_contact_address(op,(SalAddress*)(BELLE_SIP_HEADER_ADDRESS(contact))); /*update contact with real value*/
}
op->base.root->callbacks.register_success(op,belle_sip_refresher_get_expires(op->refresher)>0);
} else if (status_code>=400) {
/* from rfc3608, 6.1.
If the UA refreshes the registration, the stored value of the Service-
Route is updated according to the Service-Route header field of the
latest 200 class response. If there is no Service-Route header field
in the response, the UA clears any service route for that address-
of-record previously stored by the UA. If the re-registration
request is refused or if an existing registration expires and the UA
chooses not to re-register, the UA SHOULD discard any stored service
route for that address-of-record. */
sal_op_set_service_route(op,NULL);
sal_op_ref(op); /*take a ref while invoking the callback to make sure the operations done after are valid*/
op->base.root->callbacks.register_failure(op);
if (op->state!=SalOpStateTerminated && op->auth_info) {
/*add pending auth*/
sal_add_pending_auth(op->base.root,op);
if (status_code==403 || status_code==401 || status_code==407 )
op->base.root->callbacks.auth_failure(op,op->auth_info);
}
sal_op_unref(op);
}
}
void set_or_update_dialog(SalOp* op, belle_sip_dialog_t* dialog) {
ms_message("op [%p] : set_or_update_dialog() current=[%p] new=[%p]",op,op->dialog,dialog);
sal_op_ref(op);
if (op->dialog!=dialog){
if (op->dialog){
/*FIXME: shouldn't we delete unconfirmed dialogs ?*/
unlink_op_with_dialog(op,op->dialog);
op->dialog=NULL;
}
if (dialog) {
op->dialog=link_op_with_dialog(op,dialog);
belle_sip_dialog_enable_pending_trans_checking(dialog,op->base.root->pending_trans_checking);
}
}
sal_op_unref(op);
}
void set_or_update_dialog(SalOp* op, belle_sip_dialog_t* dialog) {
/*check if dialog has changed*/
if (dialog && dialog != op->dialog) {
ms_message("Dialog set from [%p] to [%p] for op [%p]",op->dialog,dialog,op);
/*fixme, shouldn't we cancel previous dialog*/
if (op->dialog) {
belle_sip_dialog_set_application_data(op->dialog,NULL);
belle_sip_object_unref(op->dialog);
sal_op_unref(op);
}
op->dialog=dialog;
belle_sip_dialog_set_application_data(op->dialog,op);
sal_op_ref(op);
belle_sip_object_ref(op->dialog);
}
}
static void handle_notify(SalOp *op, belle_sip_request_t *req, const char *eventname, SalBody * body){
SalSubscribeStatus sub_state;
belle_sip_header_subscription_state_t* subscription_state_header=belle_sip_message_get_header_by_type(req,belle_sip_header_subscription_state_t);
belle_sip_response_t* resp;
belle_sip_server_transaction_t* server_transaction = op->pending_server_trans;
if (!subscription_state_header || strcasecmp(BELLE_SIP_SUBSCRIPTION_STATE_TERMINATED,belle_sip_header_subscription_state_get_state(subscription_state_header)) ==0) {
sub_state=SalSubscribeTerminated;
ms_message("Outgoing subscription terminated by remote [%s]",sal_op_get_to(op));
} else
sub_state=SalSubscribeActive;
sal_op_ref(op);
op->base.root->callbacks.notify(op,sub_state,eventname,body);
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
sal_op_unref(op);
}
static void process_transaction_terminated(void *user_ctx, const belle_sip_transaction_terminated_event_t *event) {
belle_sip_client_transaction_t* client_transaction = belle_sip_transaction_terminated_event_get_client_transaction(event);
belle_sip_server_transaction_t* server_transaction = belle_sip_transaction_terminated_event_get_server_transaction(event);
belle_sip_transaction_t* trans;
SalOp* op;
if(client_transaction)
trans=BELLE_SIP_TRANSACTION(client_transaction);
else
trans=BELLE_SIP_TRANSACTION(server_transaction);
op = (SalOp*)belle_sip_transaction_get_application_data(trans);
if (op && op->callbacks && op->callbacks->process_transaction_terminated) {
op->callbacks->process_transaction_terminated(op,event);
} else {
ms_message("Unhandled transaction terminated [%p]",trans);
}
if (op) sal_op_unref(op); /*because every transaction ref op*/
}
static void unlink_op_with_dialog(SalOp *op, belle_sip_dialog_t* dialog){
belle_sip_dialog_set_application_data(dialog,NULL);
sal_op_unref(op);
belle_sip_object_unref(dialog);
}
void sal_remove_pending_auth(Sal *sal, SalOp *op){
if (ms_list_find(sal->pending_auths,op)){
sal->pending_auths=ms_list_remove(sal->pending_auths,op);
sal_op_unref(op);
}
}
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 vfu_retry (void *user_data, unsigned int events) {
SalOp *op=(SalOp *)user_data;
sal_call_send_vfu_request(op);
sal_op_unref(op);
return BELLE_SIP_STOP;
}
/*used when the SalOp was ref'd by the dialog, in which case we rely only on the dialog terminated notification*/
static void call_set_released_and_unref(SalOp* op) {
call_set_released(op);
sal_op_unref(op);
}