HelenOS sources

root/uspace/srv/net/tcp/

[..]
conn.c conn.h inet.c inet.h iqueue.c
iqueue.h ncsim.c ncsim.h pdu.c pdu.h
rqueue.c rqueue.h segment.c segment.h seq_no.c
seq_no.h service.c service.h std.h tcp.c
tcp_type.h test.c test.h test/ tqueue.c
tqueue.h ucall.c ucall.h
[..]
HelenOS homepage, sources at GitHub