ejabberd_listener

ejabberd_listener作为supervisor启动

初始化的时候创建listen_sockets(ets)表

根据配置参数启动相应的接口

[{{5222,{0,0,0,0},tcp},
  ejabberd_c2s,
  [{access,c2s},{shaper,c2s_shaper},{max_stanza_size,65536}]},
 {{5269,{0,0,0,0},tcp},ejabberd_s2s_in,[]},
 {{5280,{0,0,0,0},tcp},
  ejabberd_http,
  [{captcha,true},
   {http_bind,true},
   {web_admin,true},
   {request_handlers,[{<<"/websocket">>,ejabberd_http_ws}]}]}]

即为ejabberd_c2s，ejabberd_s2s_in，ejabberd_http

ejabberd_c2s作为连接客户端的请求server

ejabberd_s2s_in作为连接服务器的请求server

ejabberd_http作为http的请求server

但是此处指listen，并没有accept

Res = gen_tcp:listen(Port, [binary,
                    {packet, 0},
                    {active, false},
                    {reuseaddr, true},
                    {nodelay, true},
                    {send_timeout, ?TCP_SEND_TIMEOUT},
                    {send_timeout_close, true},
                    {keepalive, true} |
                    SockOpts]),

直到最后才开启接受连接

ejabberd_listener:start_listeners()