static int send_keep_alive(belle_sip_channel_t* obj) {
/*keep alive*/
const char* crlfcrlf = "\r\n\r\n";
int size=strlen(crlfcrlf);
int err=belle_sip_channel_send(obj,crlfcrlf,size);
if (err<=0 && !belle_sip_error_code_is_would_block(-err) && err!=-EINTR){
belle_sip_error("channel [%p]: could not send [%i] bytes of keep alive from [%s://%s:%i] to [%s:%i]" ,obj
,size
,belle_sip_channel_get_transport_name(obj)
,obj->local_ip
,obj->local_port
,obj->peer_name
,obj->peer_port);
return -1;
}else{
belle_sip_message("channel [%p]: keep alive sent to [%s://%s:%i]"
,obj
,belle_sip_channel_get_transport_name(obj)
,obj->peer_name
,obj->peer_port);
return 0;
}
}
static int send_buffer(belle_sip_channel_t *obj, const char *buffer, size_t size){
int ret=0;
char *logbuf=NULL;
if (obj->stack->send_error == 0){
ret=belle_sip_channel_send(obj,buffer,size);
}else if (obj->stack->send_error<0){
/*for testing purpose only */
ret=obj->stack->send_error;
} else {
ret=size; /*to silently discard message*/
}
if (ret<0){
if (!belle_sip_error_code_is_would_block(-ret)){
belle_sip_error("channel [%p]: could not send [%i] bytes from [%s://%s:%i] to [%s:%i]" ,obj
,(int)size
,belle_sip_channel_get_transport_name(obj)
,obj->local_ip
,obj->local_port
,obj->peer_name
,obj->peer_port);
channel_set_state(obj,BELLE_SIP_CHANNEL_ERROR);
}/*ewouldblock error has to be handled by caller*/
}else if (size==(size_t)ret){
logbuf=make_logbuf(BELLE_SIP_LOG_MESSAGE, buffer,size);
belle_sip_message("channel [%p]: message %s to [%s://%s:%i], size: [%i] bytes\n%s"
,obj
,obj->stack->send_error==0?"sent":"silently discarded"
,belle_sip_channel_get_transport_name(obj)
,obj->peer_name
,obj->peer_port
,ret
,logbuf);
}else{
logbuf=make_logbuf(BELLE_SIP_LOG_MESSAGE,buffer,ret);
belle_sip_message("channel [%p]: message partly sent to [%s://%s:%i], sent: [%i/%i] bytes:\n%s"
,obj
,belle_sip_channel_get_transport_name(obj)
,obj->peer_name
,obj->peer_port
,ret
,(int)size
,logbuf);
}
if (logbuf) belle_sip_free(logbuf);
return ret;
}
