if(flag == UIP_POLL_REQUEST) {
if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED &&
!uip_outstanding(uip_connr)) {
+ uip_len = uip_slen = 0;
uip_flags = UIP_POLL;
UIP_APPCALL();
goto appsend;
} else if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED) {
/* If there was no need for a retransmission, we poll the
application for new data. */
+ uip_len = uip_slen = 0;
uip_flags = UIP_POLL;
UIP_APPCALL();
goto appsend;