static int set_expires_from_trans(belle_sip_refresher_t* refresher) {
belle_sip_transaction_t* transaction = BELLE_SIP_TRANSACTION(refresher->transaction);
belle_sip_response_t*response=transaction->last_response;
belle_sip_request_t*request=belle_sip_transaction_get_request(transaction);
belle_sip_header_expires_t* expires_header=belle_sip_message_get_header_by_type(request,belle_sip_header_expires_t);
belle_sip_header_contact_t* contact_header;
refresher->obtained_expires=-1;
if (strcmp("REGISTER",belle_sip_request_get_method(request))==0
|| expires_header /*if request has an expire header, refresher can always work*/) {
if (expires_header)
refresher->target_expires = belle_sip_header_expires_get_expires(expires_header);
/*An "expires" parameter on the "Contact" header has no semantics for
* SUBSCRIBE and is explicitly not equivalent to an "Expires" header in
* a SUBSCRIBE request or response.
*/
if (strcmp("REGISTER",belle_sip_request_get_method(request))==0){
if (!expires_header && (contact_header=belle_sip_message_get_header_by_type((belle_sip_message_t*)request,belle_sip_header_contact_t))){
int ct_expires=belle_sip_header_contact_get_expires(BELLE_SIP_HEADER_CONTACT(contact_header));
if (ct_expires!=-1) refresher->target_expires=ct_expires;
}
/*check in response also to get the obtained expires*/
if ((contact_header=belle_sip_refresher_get_contact(refresher))!=NULL){
/*matching contact, check for its possible expires param*/
refresher->obtained_expires=belle_sip_header_contact_get_expires(BELLE_SIP_HEADER_CONTACT(contact_header));
}
}
if (refresher->obtained_expires==-1){
/*no contact with expire or not relevant, looking for Expires header*/
if (response && (expires_header=(belle_sip_header_expires_t*)belle_sip_message_get_header(BELLE_SIP_MESSAGE(response),BELLE_SIP_EXPIRES))) {
refresher->obtained_expires = belle_sip_header_expires_get_expires(expires_header);
}
}
if (refresher->obtained_expires==-1) {
belle_sip_message("Neither Expires header nor corresponding Contact header found, checking from original request");
refresher->obtained_expires=refresher->target_expires;
}else if (refresher->target_expires>0 && refresher->obtained_expires==0){
const char* reason = response ? belle_sip_response_get_reason_phrase(response) : NULL;
/*check this case because otherwise we are going to loop fast in sending refresh requests.*/
/*"Test account created" is a special reason given by testers when we create temporary account.
Since this is a bit of hack, we can ignore logging in that case*/
if (reason && strcmp(reason, "Test account created") != 0) {
belle_sip_warning("Server replied with 0 expires, what does that mean?");
}
/*suppose it's a server bug and assume our target_expires is understood.*/
refresher->obtained_expires=refresher->target_expires;
}
} else if (strcmp("INVITE",belle_sip_request_get_method(request))==0) {
belle_sip_error("Refresher does not support INVITE yet");
return -1;
} else {
belle_sip_error("Refresher does not support [%s] yet",belle_sip_request_get_method(request));
return -1;
}
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;
}
}
