49 lines
795 B
Go
49 lines
795 B
Go
package main
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import (
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"net"
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)
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func updateUDPConn(device *Device) error {
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netc := &device.net
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netc.mutex.Lock()
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defer netc.mutex.Unlock()
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// close existing connection
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if netc.conn != nil {
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netc.conn.Close()
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}
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// open new connection
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if device.tun.isUp.Get() {
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// listen on new address
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conn, err := net.ListenUDP("udp", netc.addr)
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if err != nil {
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return err
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}
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// retrieve port (may have been chosen by kernel)
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addr := conn.LocalAddr()
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netc.conn = conn
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netc.addr, _ = net.ResolveUDPAddr(addr.Network(), addr.String())
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signalSend(device.signal.newUDPConn)
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}
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return nil
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}
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func closeUDPConn(device *Device) {
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netc := &device.net
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netc.mutex.Lock()
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if netc.conn != nil {
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netc.conn.Close()
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}
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netc.mutex.Unlock()
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signalSend(device.signal.newUDPConn)
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}
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