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;
}
belle_sip_header_contact_t* belle_sip_refresher_get_contact(const belle_sip_refresher_t* refresher) {
belle_sip_transaction_t* transaction = BELLE_SIP_TRANSACTION(refresher->transaction);
belle_sip_request_t*request=belle_sip_transaction_get_request(transaction);
belle_sip_response_t*response=transaction->last_response;
const belle_sip_list_t* contact_header_list;
belle_sip_header_contact_t* unfixed_local_contact;
belle_sip_header_contact_t* fixed_local_contact;
char* tmp_string;
char* tmp_string2;
if (!response)
return NULL;
/*we assume, there is only one contact in request*/
unfixed_local_contact= belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(request),belle_sip_header_contact_t);
fixed_local_contact= BELLE_SIP_HEADER_CONTACT(belle_sip_object_clone(BELLE_SIP_OBJECT(unfixed_local_contact)));
/*first fix contact using received/rport*/
belle_sip_response_fix_contact(response,fixed_local_contact);
contact_header_list = belle_sip_message_get_headers(BELLE_SIP_MESSAGE(response),BELLE_SIP_CONTACT);
if (contact_header_list) {
contact_header_list = belle_sip_list_find_custom((belle_sip_list_t*)contact_header_list
,(belle_sip_compare_func)belle_sip_header_contact_not_equals
, (const void*)fixed_local_contact);
if (!contact_header_list) {
/*reset header list*/
contact_header_list = belle_sip_message_get_headers(BELLE_SIP_MESSAGE(response),BELLE_SIP_CONTACT);
contact_header_list = belle_sip_list_find_custom((belle_sip_list_t*)contact_header_list
,(belle_sip_compare_func)belle_sip_header_contact_not_equals
,unfixed_local_contact);
}
if (!contact_header_list) {
tmp_string=belle_sip_object_to_string(BELLE_SIP_OBJECT(fixed_local_contact));
tmp_string2=belle_sip_object_to_string(BELLE_SIP_OBJECT(unfixed_local_contact));
belle_sip_message("No matching contact neither for [%s] nor [%s]", tmp_string, tmp_string2);
belle_sip_object_unref(fixed_local_contact);
belle_sip_free(tmp_string);
belle_sip_free(tmp_string2);
return NULL;
} else {
belle_sip_object_unref(fixed_local_contact);
return BELLE_SIP_HEADER_CONTACT(contact_header_list->data);
}
} else {
return NULL;
}
}
