static int send_notify_for_refer(SalOp* op, int code, const char *reason){
belle_sip_request_t* notify=belle_sip_dialog_create_queued_request(op->dialog,"NOTIFY");
char *sipfrag=belle_sip_strdup_printf("SIP/2.0 %i %s\r\n",code,reason);
size_t content_length=strlen(sipfrag);
belle_sip_message_add_header(BELLE_SIP_MESSAGE(notify)
,BELLE_SIP_HEADER(belle_sip_header_subscription_state_create(BELLE_SIP_SUBSCRIPTION_STATE_ACTIVE,-1)));
belle_sip_message_add_header(BELLE_SIP_MESSAGE(notify),belle_sip_header_create("Event","refer"));
belle_sip_message_add_header(BELLE_SIP_MESSAGE(notify),BELLE_SIP_HEADER(belle_sip_header_content_type_create("message","sipfrag")));
belle_sip_message_add_header(BELLE_SIP_MESSAGE(notify),BELLE_SIP_HEADER(belle_sip_header_content_length_create(content_length)));
belle_sip_message_assign_body(BELLE_SIP_MESSAGE(notify),sipfrag,content_length);
return sal_op_send_request(op,notify);
}
static int set_sdp(belle_sip_message_t *msg,belle_sdp_session_description_t* session_desc) {
belle_sip_header_content_type_t* content_type ;
belle_sip_header_content_length_t* content_length;
belle_sip_error_code error = BELLE_SIP_BUFFER_OVERFLOW;
size_t length = 0;
if (session_desc) {
size_t bufLen = 2048;
size_t hardlimit = 16*1024; /* 16k SDP limit seems reasonable */
char* buff = belle_sip_malloc(bufLen);
content_type = belle_sip_header_content_type_create("application","sdp");
/* try to marshal the description. This could go higher than 2k so we iterate */
while( error != BELLE_SIP_OK && bufLen <= hardlimit && buff != NULL){
error = belle_sip_object_marshal(BELLE_SIP_OBJECT(session_desc),buff,bufLen,&length);
if( error != BELLE_SIP_OK ){
bufLen *= 2;
length = 0;
buff = belle_sip_realloc(buff,bufLen);
}
}
/* give up if hard limit reached */
if (error != BELLE_SIP_OK || buff == NULL) {
ms_error("Buffer too small (%d) or not enough memory, giving up SDP", (int)bufLen);
return -1;
}
content_length = belle_sip_header_content_length_create(length);
belle_sip_message_add_header(msg,BELLE_SIP_HEADER(content_type));
belle_sip_message_add_header(msg,BELLE_SIP_HEADER(content_length));
belle_sip_message_assign_body(msg,buff,length);
return 0;
} else {
return -1;
}
}
