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Chapter 6 Dedicated Service
37
6.3
XGT Server
6.3.1 TCP XGT server
TCP XGT server operates as below [Fig.6-5] TCP XGT server operation flow.
Client
Time
①
SYN
Time
②
SYN ACK
③
ACK
④
PUSH ACK
PUSH ACK
⑥
ACK
⑦
FIN ACK
⑧
ACK
⑨
RST
Server
Transmission port : n >1024
Destination port : 2004
Connection
Disconnection
Connection
Disconnection
XGT dedicated
protocol
(Client)
XGT dedicated
protocol
(Server)
Transmission port : n >1024
Destination port : 2004
●
●
●
[Figure 6-5] TCP XGT server operation flow
(1) Connection
(a) Client does transmit
①
SYN to serve. Server does
②
SYN ACK.
(b) Connection port no. is XGT dedicated protocol port no. 2004.
(c) Client does connection check response
③
ACK.
(d) Finishing ~
① ③
makes client/server connection.
(2) TCP XGT server
(a) After connection, client does transmit PUSH ACK according to XGT dedicated protocol.
④
(b) Server does transmit
⑤
PUSH ACK for PUSH ACK Frame.
(c) Client does transmit
⑥
ACK.
(3) Disconnection
(a) Client does transmit
⑦
DISCONNECTION.
(b) Server does transmit
⑧
RST and disconnect.