Source position: ntcph.inc line 27
type tcphdr = record
source: u_int16_t;
dest: u_int16_t;
seq: u_int32_t;
ack_seq: u_int32_t;
flag0: u_int16_t;
window: u_int16_t;
check: u_int16_t;
urg_ptr: u_int16_t;
end;