TCPの状態遷移図

https://plantuml-proxy.vercel.app/svg/https://scrapbox.io/api/code/villagepump/TCPの状態遷移図/tcpstd.pu#.svg

code:tcpstd.pu

@startdot

digraph std {

size ="8.5, 11";

rankdir = TD;

ratio=auto;

label="TCPの状態遷移図";

}

@enddot

code:tcp.mermaid

graph TD

CLOSED -->|パッシブオープン（TCB生成）| LISTEN

CLOSED -->|アクティブオープン（TCB生成とSYNの送信）| SYN_SENT

LISTEN -->|SYNの受信（SYN/ACKの送信）| SYN_RECEIVED

LISTEN -->|クローズ（TCB削除）| CLOSED

LISTEN -->|SENT（SYNの送信）| SYN_SENT

SYN_RECEIVED -->|ACKの受信| ESTABLISHED

SYN_RECEIVED -->|クローズ（FINの送信）| FIN_WAIT_1

SYN_SENT -->|SYN/ACKの受信（ACKの送信）| ESTABLISHED

SYN_SENT -->|SYNの受信（ACKの送信）| SYN_RECEIVED

ESTABLISHED -->|クローズ（FINの送信）| FIN_WAIT_1

FIN_WAIT_1 -->|ACKの受信| FIN_WAIT_2

FIN_WAIT_1 -->|FINの受信（ACKの送信）| CLOSING

FIN_WAIT_1 -->|FIN ACKの受信（ACKの送信）| TIME_WAIT

FIN_WAIT_2 -->|FINの受信（ACKの送信）| TIME_WAIT

CLOSING -->|FIN ACKの受信| TIME_WAIT

TIME_WAIT -->|タイムアウト待ち（TCB削除）| CLOSED

ESTABLISHED -->|FIN ACKの受信| CLOSE_WAIT

CLOSE_WAIT -->|クローズ（FINの送信）| LAST_ACK

LAST_ACK -->|FIN ACKの受信| CLOSED