TCP, in CLOSE-WAIT state, MUST return ACK with proper SEQ and ACK numbers after
recv a seg with OTW SEQ or unacc ACK number, and remain in same state. If the
connection is in a synchronized state, any unacceptable segment (out of window
sequence number or unacceptable acknowledgment number) must elicit only an empty
acknowledgment segment containing the current send-sequence number and an
acknowledgment indicating the next sequence number expected to be received, and
the connection remains in the same state.
PiperOrigin-RevId: 306897984
Attempt to redeliver TCP segments that are enqueued into a closing
TCP endpoint. This was being done for Established endpoints but not
for those that are listening or performing connection handshake.
Fixes#2417
PiperOrigin-RevId: 306598155
TCP, in ESTABLISHED state, SHOULD piggyback acknowledgement with a segment being
transmitted (whenever possible) without incurring undue delay
PiperOrigin-RevId: 306474550
RFC 1122 Section 3.7: A sending TCP MUST be robust against window shrinking,
which may cause the "useable window" to become negative.
PiperOrigin-RevId: 305377072
Eyal Soha
gVisor bot
Mithun Iyer