LISTEN
CLOSED
ESTABLISHED
SYN_RCVD SYN_SENT
FIN_WAIT_1 CLOSING
TIME_WAITFIN_WAIT_2
CLOSE_WAIT
LAST_ACK
Appl: passive open
Send: <nothing>
Passive open
Recv:RST
Recv: SYN;
Send: SYN,ACK
Recv:SYN
Send: SYN, ACK
Appl: active open
Send: SYN
Active open
Recv: ACK
Send: <nothing>
Recv: FIN
Send: ACK
Appl: close
Send: FIN
Recv: FIN
Send: ACK
Recv: ACK
Send: <nothing>
Recv: FIN
Send: ACK
Recv: ACK
Send: <nothing>
Recv: FIN, ACK
Send: ACK
2MSL timeout
Appl: close
Send: FIN
Recv: ACK
Send: <nothing>
Appl: close
Or timeout
Recv: SYN, ACK
Send: ACK
Active close
Passive close
Indicate normal transition for client
Indicate normal transition for server
Indicate innormal transition
