我正在修補golang，我的第一個代碼是一個簡單的IRC機器人，其中包含以下代碼：package mainimport ("net"        "log"        "bufio"        "fmt"        "net/textproto"      )type Bot struct{        server string        port string        nick string        user string        channel string        pass string        pread, pwrite chan string        conn net.Conn}func NewBot() *Bot {        return &Bot{server: "irc.freenode.net",                    port: "6667",                    nick: "subsaharan",                    channel: "#rapidsms",                     pass: "",                    conn: nil,                    user: "blaze"}}func (bot *Bot) Connect() (conn net.Conn, err error){  conn, err = net.Dial("tcp",bot.server + ":" + bot.port)  if err != nil{    log.Fatal("unable to connect to IRC server ", err)  }  bot.conn = conn  log.Printf("Connected to IRC server %s (%s)\n", bot.server, bot.conn.RemoteAddr())  return bot.conn, nil}func main(){  ircbot := NewBot()  conn, _ := ircbot.Connect()  conn.Write([]byte("NICK " + ircbot.nick))  conn.Write([]byte("JOIN " + ircbot.channel))  defer conn.Close()  reader := bufio.NewReader(conn)  tp := textproto.NewReader( reader )  for {        line, err := tp.ReadLine()        if err != nil {            break // break loop on errors            }        fmt.Printf("%s\n", line)    }}當我運行此代碼時，將在終端上獲得以下輸出：2012/11/12 13:31:20 Connected to IRC server irc.freenode.net (193.219.128.49:6667):sendak.freenode.net NOTICE * :*** Looking up your hostname...:sendak.freenode.net NOTICE * :*** Checking Ident:sendak.freenode.net NOTICE * :*** Couldn't look up your hostname:sendak.freenode.net NOTICE * :*** No Ident responseERROR :Closing Link: 127.0.0.1 (Connection timed out)連接為何一直超時？