int8_t hh10d_read(struct packet_t *packet) {
int RH;
char buf[6];
uart_putstr_P(PSTR("hh10d read\r\n"));
RH = (offset - (double)old_cnt) * sens / 4096.0;
#ifdef DEBUG
itoa(old_cnt,buf,10);
uart_putstr(buf);
uart_putstr_P(PSTR("\r\n"));
itoa(RH,buf,10);
uart_putstr(buf);
uart_putstr_P(PSTR("\r\n"));
#endif
if (get_remaining_length(packet) < 2) return -1;
return set_data_int16(packet,RH);
}
void socket_read_handle(struct ev_loop *reactor, ev_io *w, int events)
{
session_t *s_session = (session_t*)w;
if(s_session->to_process == HEADER){
/* here is a brand new packet */
int r_len = read(w->fd, &s_session->header, 1);
if(r_len == 0){
log_error("unexpected EOF");
remove_session(s_session);
return;
}
s_session->recv_length += 1;
//s_session->command = get_command(s_session->header);
s_session->to_process = REMAINING;
}
if(s_session->to_process == REMAINING){
/*
* get "remaining" part in header, it may takes 1~4 bytes, and it has
* to read one by one.
*
*/
do{
int r_len = read(w->fd, s_session->remain_bytes+(int)s_session->remaining_read, 1);
if(r_len == 0){
log_error("unexpected EOF");
remove_session(s_session);
return;
}
if(r_len < 0){
if(errno == EAGAIN || errno == EINTR){
/* exit wait for next data in */
return;
}else{
log_error("error connection");
remove_session(s_session);
return;
}
}
s_session->remaining_read += 1;
s_session->recv_length += r_len;
/* it means at least one more byte exist */
if((s_session->remain_bytes[s_session->remaining_read-1] & 128) > 0){
/* 4 bytes at most for repesenting remaining length */
if( s_session->remaining_read >= MQTT_LENGTH_MAX_BYTE){
log_error("protocol error");
remove_session(s_session);
return;
}
}else{
/* all bytes for remaining length read */
s_session->remaining_length = get_remaining_length(s_session->remain_bytes);
s_session->to_process = CONTENT;
s_session->recv_length = 0;
s_session->content = (char*)talloc(s_session->remaining_length);
break;
}
}while(1);
}
if(s_session->to_process == CONTENT){
/* at least one byte left to read */
do{
int r_len;
r_len = read(w->fd, s_session->content, s_session->remaining_length-s_session->recv_length);
if(r_len == 0){
log_error("unexpected EOF");
remove_session(s_session);
return;
}
if(r_len < 0){
if(errno == EAGAIN || errno == EINTR){
return;
}else{
log_error("error connection");
remove_session(s_session);
return;
}
}
s_session->recv_length += r_len;
if(s_session->recv_length >= s_session->remaining_length){
_msg_add(pdata.msg_queue, s_session);
_clean_session(s_session);
break;
}
}while(1);
}
return;
}
