49 lines
968 B
Go
49 lines
968 B
Go
package peer
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import (
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"log"
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"net"
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"time"
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)
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func RunMCReader(g Globals) {
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for {
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runMCReaderInner(g)
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time.Sleep(broadcastErrorTimeoutInterval)
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}
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}
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func runMCReaderInner(g Globals) {
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var (
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buf = make([]byte, bufferSize)
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logf = func(s string, args ...any) {
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log.Printf("[MCReader] "+s, args...)
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}
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)
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conn, err := net.ListenMulticastUDP("udp", nil, multicastAddr)
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if err != nil {
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logf("Failed to bind to multicast address: %v", err)
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return
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}
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for {
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conn.SetReadDeadline(time.Now().Add(32 * time.Second))
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n, remoteAddr, err := conn.ReadFromUDPAddrPort(buf[:bufferSize])
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if err != nil {
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logf("Failed to read from UDP port): %v", err)
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return
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}
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buf = buf[:n]
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h, ok := headerFromLocalDiscoveryPacket(buf)
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if !ok {
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logf("Failed to open discovery packet?")
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continue
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}
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log.Printf("Got local discovery from %v: %v", remoteAddr, h)
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g.RemotePeers[h.SourceIP].Load().HandleLocalDiscoveryPacket(h, remoteAddr, buf)
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}
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}
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