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udp: support using domain names instead of IPs (#2150)

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Alessandro Ros 2023-08-05 16:40:51 +02:00 • committed by GitHub
parent 8bb71ac8d8
commit ce0924ac72
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 95 additions and 12 deletions
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14
internal/core/udp_source.go
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@ -92,16 +92,18 @@ func (s *udpSource) run(ctx context.Context, cnf *conf.PathConf, _ chan *conf.Pa
hostPort := cnf.Source[len("udp://"):]
pc, err := net.ListenPacket(restrictNetwork("udp", hostPort))
addr, err := net.ResolveUDPAddr("udp", hostPort)
if err != nil {
return err
}
pc, err := net.ListenPacket(restrictNetwork("udp", addr.String()))
if err != nil {
return err
}
defer pc.Close()
host, _, _ := net.SplitHostPort(hostPort)
ip := net.ParseIP(host)
if ip.IsMulticast() {
if addr.IP.IsMulticast() {
p := ipv4.NewPacketConn(pc)
err = p.SetMulticastTTL(multicastTTL)
@ -109,7 +111,7 @@ func (s *udpSource) run(ctx context.Context, cnf *conf.PathConf, _ chan *conf.Pa
return err
}
err = joinMulticastGroupOnAtLeastOneInterface(p, ip)
err = joinMulticastGroupOnAtLeastOneInterface(p, addr.IP)
if err != nil {
return err
}