tcpclient.wsd

@startuml

actor app

== 准备 ==
app -> tcpclient: rt_tcpclient_start(hostname, port)
tcpclient -> tcpclient: pipe create
tcpclient -> tcpclient: socket create
tcpclient -> server: tcp connect
tcpclient -> tcpclient: select(max_fd, read_fds(socket, pipe), ...)
note right: 以 select 方式，同时探测 pipe，socket 两个数据源通道

app -> tcpclient: rt_tcpclient_attach_rx_cb(thiz, rt_tc_rx_cb)
note right: 注册回调函数

== 数据收发 ==
app -> tcpclient: rt_tcpclient_send(thiz, buff, len)
note right: 往 pipe 写数据

tcpclient -[#green]> tcpclient: read data from pipe
note right: select 探测到 pipe 可读，然后 tcpclient 读取 pipe

tcpclient -> server: send data to server
note right: 通过 socket 发送数据到 server

server -> tcpclient: tcpclient recv data
note left: 通过 socket 发送数据到 tcpclient 

tcpclient -[#blue]> tcpclient: read data from socket
note right: select 探测到 socket 可读，然后 tcpclient 读取 socket

tcpclient --> app: rt_tc_rx_cb(buff, len)
note left: app 通过回调函数接收数据

== 关闭 ==
app -> tcpclient: rt_tcpclient_close(thiz)

tcpclient -> tcpclient: pipe close
tcpclient -> tcpclient: socket close

@enduml