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Refactor UDP DNS hijack

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This commit is contained in:
世界
2026-07-19 13:04:55 +08:00
parent fea6299fa7
commit 7163aa08e3
17 changed files with 126 additions and 62 deletions
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protocol/tun/inbound.go
+21
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@@ -18,6 +18,7 @@ import (
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-tun"
"github.com/sagernet/sing-tun/gtcpip/header"
"github.com/sagernet/sing/common"
E "github.com/sagernet/sing/common/exceptions"
"github.com/sagernet/sing/common/json/badoption"
@@ -516,11 +517,27 @@ func (t *Inbound) Close() error {
func (t *Inbound) JudgeFlow(network uint8, source netip.AddrPort, destination netip.AddrPort, firstPacket []byte) tun.FlowVerdict {
if slices.Contains(t.dnsHijackAddress, destination.Addr()) {
if network == uint8(header.UDPProtocolNumber) {
return tun.FlowVerdict{Action: tun.ActionHijackDNS}
}
return tun.FlowVerdict{Action: tun.ActionAccept}
}
return adapter.JudgeFlow(t.router, t.tag, C.TypeTun, network, source, destination, firstPacket)
}
func (t *Inbound) NewDNSPacket(payload []byte, source M.Socksaddr, destination M.Socksaddr, writer N.PacketWriter) {
ctx := log.ContextWithNewID(t.ctx)
var metadata adapter.InboundContext
metadata.Inbound = t.tag
metadata.InboundType = C.TypeTun
metadata.Network = N.NetworkUDP
metadata.Source = source
metadata.Destination = destination
metadata.Protocol = C.ProtocolDNS
t.logger.InfoContext(ctx, "inbound DNS packet from ", source)
t.router.HijackDNSPacket(ctx, payload, writer, metadata)
}
func (t *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
ctx = log.ContextWithNewID(ctx)
var metadata adapter.InboundContext
@@ -591,3 +608,7 @@ func (t *autoRedirectHandler) NewConnectionEx(ctx context.Context, conn net.Conn
func (t *autoRedirectHandler) NewPacketConnectionEx(ctx context.Context, conn N.PacketConn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
panic("unexcepted")
}
func (t *autoRedirectHandler) NewDNSPacket(payload []byte, source M.Socksaddr, destination M.Socksaddr, writer N.PacketWriter) {
(*Inbound)(t).NewDNSPacket(payload, source, destination, writer)
}