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[client] Add TCP DNS support for local listener (#5758)

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This commit is contained in:
Viktor Liu
2026-04-08 13:40:36 +08:00
committed by GitHub
parent 1d920d700c
commit cb73b94ffb
28 changed files with 1615 additions and 417 deletions
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20
client/internal/dns/response_writer.go
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@@ -104,3 +104,23 @@ func (r *responseWriter) TsigTimersOnly(bool) {
// After a call to Hijack(), the DNS package will not do anything with the connection.
func (r *responseWriter) Hijack() {
}
// remoteAddrFromPacket extracts the source IP:port from a decoded packet for logging.
func remoteAddrFromPacket(packet gopacket.Packet) *net.UDPAddr {
var srcIP net.IP
if ipv4 := packet.Layer(layers.LayerTypeIPv4); ipv4 != nil {
srcIP = ipv4.(*layers.IPv4).SrcIP
} else if ipv6 := packet.Layer(layers.LayerTypeIPv6); ipv6 != nil {
srcIP = ipv6.(*layers.IPv6).SrcIP
}
var srcPort int
if udp := packet.Layer(layers.LayerTypeUDP); udp != nil {
srcPort = int(udp.(*layers.UDP).SrcPort)
}
if srcIP == nil {
return nil
}
return &net.UDPAddr{IP: srcIP, Port: srcPort}
}