50 lines
854 B
Go
50 lines
854 B
Go
package main
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import (
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"context"
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"net"
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"time"
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)
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func Listen(network, address string) (net.Listener, error) {
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lc := net.ListenConfig{}
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var lastErr error
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for i := 0; i < 5; i++ {
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l, err := lc.Listen(context.Background(), network, address)
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if err == nil {
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return l, nil
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}
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lastErr = err
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time.Sleep(time.Millisecond * 200)
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}
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return nil, lastErr
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}
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func ListenPacket(network, address string) (net.PacketConn, error) {
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var lastErr error
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for i := 0; i < 5; i++ {
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l, err := net.ListenPacket(network, address)
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if err == nil {
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return l, nil
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}
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lastErr = err
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time.Sleep(time.Millisecond * 200)
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}
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return nil, lastErr
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}
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func TCPing(addr string) bool {
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for i := 0; i < 10; i++ {
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conn, err := net.Dial("tcp", addr)
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if err == nil {
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conn.Close()
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return true
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}
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time.Sleep(time.Millisecond * 500)
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}
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return false
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}
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