func writeUDP(ft *natty.FiveTuple) {
local, remote, err := ft.UDPAddrs()
if err != nil {
log.Fatalf("Unable to resolve UDP addresses: %s", err)
}
conn, err := net.DialUDP("udp", local, remote)
if err != nil {
log.Fatalf("Unable to dial UDP: %s", err)
}
for {
msg := fmt.Sprintf("Hello from %s to %s", ft.Local, ft.Remote)
log.Printf("Sending UDP message: %s", msg)
_, err := conn.Write([]byte(msg))
if err != nil {
log.Fatalf("Offerer unable to write to UDP: %s", err)
}
time.Sleep(1 * time.Second)
}
}
func readUDP(peerId waddell.PeerId, traversalId uint32, ft *natty.FiveTuple) {
local, _, err := ft.UDPAddrs()
if err != nil {
log.Fatalf("Unable to resolve UDP addresses: %s", err)
}
conn, err := net.ListenUDP("udp", local)
if err != nil {
log.Fatalf("Unable to listen on UDP: %s", err)
}
log.Printf("Listening for UDP packets at: %s", local)
notifyClientOfServerReady(peerId, traversalId)
b := make([]byte, 1024)
for {
n, addr, err := conn.ReadFrom(b)
if err != nil {
log.Fatalf("Unable to read from UDP: %s", err)
}
msg := string(b[:n])
log.Printf("Got UDP message from %s: '%s'", addr, msg)
}
}