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@ -281,13 +281,23 @@ func (cc *Client) keepAlive(interval time.Duration, maxCount int) {
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for {
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select {
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case <-c.C:
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_, _, err := cc.sshConn.SendRequest("keepalive@openssh.org", true, nil)
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if err != nil {
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Log(DEBUG, "keep alive error: %s", err.Error())
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resCh := make(chan error, 1)
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go func(resCh chan error) {
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_, _, err := cc.sshConn.SendRequest("keepalive@openssh.org", true, nil)
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resCh <- err
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}(resCh)
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select {
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case err := <-resCh:
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if err != nil {
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Log(DEBUG, "keep alive error: %s", err.Error())
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count++
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} else {
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count = 0
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}
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case <-time.After(3 * time.Second):
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count++
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} else {
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count = 0
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}
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if count >= maxCount {
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cc.err = fmt.Errorf("keep alive detects connection hang up")
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Log(ERROR, "keep alive hit max count, exit")
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