CODEWITHSUNDEEP
gossh
abritov
abritov

Reputation: 403

golang ssh dial timeout

What is the best way to create DialTimeout on ssh connection? For example, this code always returns "Ping deadline exceed":

func (t *Tunnel) ping(sshConn *ssh.Client, addr string) (net.Conn, error) {
    var (
        conn net.Conn
        err  error
        done chan int
    )
    go func() {
        time.Sleep(getSeconds(10))
        err = errors.New("Ping deadline exceed")
        log.Printf("%v\nStatus: bad %s -> %s", err, t.serverAddr, addr)
        t.writeStatus(bad)
        done <- 1
        close(done)
    }()
    go func() {
        conn, err = sshConn.Dial("tcp", addr)
        if err != nil {
            t.writeStatus(bad)
            log.Printf("%v\nStatus: bad %s -> %s", err, t.serverAddr, addr)
        }
        done <- 1
        close(done)
    }()
    <-done
    return conn, err
}

PS Timeout in ssh.ClientConfig is set to 5 seconds

Upvotes: 6

Views: 4527

Answers (2)

Safak
Safak

Reputation: 53

It's been two years but, may someone need the solution. So here it is.

In ssh.Dial, you can give configuration via ssh.ClientConfig,

config := &ssh.ClientConfig { Timeout: time.Minute }
client, _ := ssh.Dial("tcp", t.ServerAddr, config)

You can find more in here:

// A Timeout of zero means no timeout. Timeout time.Duration

Upvotes: 5

Ryan Guest
Ryan Guest

Reputation: 6470

Instead of using sshConn.Dial take a look at:

func DialTimeout(network, address string, timeout time.Duration) (Conn, error)

From the connection docs:

DialTimeout acts like Dial but takes a timeout. The timeout includes name resolution, if required.

Upvotes: -1

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