diff --git a/go.mod b/go.mod
index 672eb6e..452ddac 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	github.com/sagernet/gvisor v0.0.0-20250822052253-5558536cf237
 	github.com/sagernet/netlink v0.0.0-20240612041022-b9a21c07ac6a
 	github.com/sagernet/nftables v0.3.0-beta.4
-	github.com/sagernet/sing v0.7.6-0.20250825115037-1dbcbdf691a5
+	github.com/sagernet/sing v0.7.6-0.20250825141840-811aa328e57b
 	github.com/stretchr/testify v1.9.0
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
 	golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8
diff --git a/go.sum b/go.sum
index 8f45d8c..4b6325c 100644
--- a/go.sum
+++ b/go.sum
@@ -24,8 +24,8 @@ github.com/sagernet/netlink v0.0.0-20240612041022-b9a21c07ac6a h1:ObwtHN2VpqE0ZN
 github.com/sagernet/netlink v0.0.0-20240612041022-b9a21c07ac6a/go.mod h1:xLnfdiJbSp8rNqYEdIW/6eDO4mVoogml14Bh2hSiFpM=
 github.com/sagernet/nftables v0.3.0-beta.4 h1:kbULlAwAC3jvdGAC1P5Fa3GSxVwQJibNenDW2zaXr8I=
 github.com/sagernet/nftables v0.3.0-beta.4/go.mod h1:OQXAjvjNGGFxaTgVCSTRIhYB5/llyVDeapVoENYBDS8=
-github.com/sagernet/sing v0.7.6-0.20250825115037-1dbcbdf691a5 h1:ozQMu9iZGuSNdNaoBTy2E9ukYsE0uY4p9U0jA0CqrsM=
-github.com/sagernet/sing v0.7.6-0.20250825115037-1dbcbdf691a5/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
+github.com/sagernet/sing v0.7.6-0.20250825141840-811aa328e57b h1:RCfo1Q6VDAXfumNupRyqTomKzDODhASswkxVCqM8l2M=
+github.com/sagernet/sing v0.7.6-0.20250825141840-811aa328e57b/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/vishvananda/netns v0.0.4 h1:Oeaw1EM2JMxD51g9uhtC0D7erkIjgmj8+JZc26m1YX8=
diff --git a/network_name.go b/network_name.go
deleted file mode 100644
index fa487fb..0000000
--- a/network_name.go
+++ /dev/null
@@ -1,42 +0,0 @@
-package tun
-
-import (
-	"strconv"
-
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
-	F "github.com/sagernet/sing/common/format"
-	N "github.com/sagernet/sing/common/network"
-)
-
-func NetworkName(network uint8) string {
-	switch tcpip.TransportProtocolNumber(network) {
-	case header.TCPProtocolNumber:
-		return N.NetworkTCP
-	case header.UDPProtocolNumber:
-		return N.NetworkUDP
-	case header.ICMPv4ProtocolNumber:
-		return N.NetworkICMPv4
-	case header.ICMPv6ProtocolNumber:
-		return N.NetworkICMPv6
-	}
-	return F.ToString(network)
-}
-
-func NetworkFromName(name string) uint8 {
-	switch name {
-	case N.NetworkTCP:
-		return uint8(header.TCPProtocolNumber)
-	case N.NetworkUDP:
-		return uint8(header.UDPProtocolNumber)
-	case N.NetworkICMPv4:
-		return uint8(header.ICMPv4ProtocolNumber)
-	case N.NetworkICMPv6:
-		return uint8(header.ICMPv6ProtocolNumber)
-	}
-	parseNetwork, err := strconv.ParseUint(name, 10, 8)
-	if err != nil {
-		return 0
-	}
-	return uint8(parseNetwork)
-}
diff --git a/ping/ping_test.go b/ping/ping_test.go
index 73a56b2..7ec291a 100644
--- a/ping/ping_test.go
+++ b/ping/ping_test.go
@@ -12,6 +12,7 @@ import (
 	"github.com/sagernet/sing-tun/internal/gtcpip/header"
 	"github.com/sagernet/sing-tun/ping"
 	"github.com/sagernet/sing/common/buf"
+
 	"github.com/stretchr/testify/require"
 )
 
diff --git a/ping/socket_unix.go b/ping/socket_unix.go
index 3d3c59b..3e9bc99 100644
--- a/ping/socket_unix.go
+++ b/ping/socket_unix.go
@@ -12,6 +12,7 @@ import (
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
+
 	"golang.org/x/sys/unix"
 )
 
diff --git a/stack_gvisor_icmp.go b/stack_gvisor_icmp.go
index c2e369b..cb46405 100644
--- a/stack_gvisor_icmp.go
+++ b/stack_gvisor_icmp.go
@@ -61,7 +61,7 @@ func (f *ICMPForwarder) HandlePacket(id stack.TransportEndpointID, pkt *stack.Pa
 		if destinationAddr != f.inet4Address {
 			action, err := f.mapping.Lookup(DirectRouteSession{Source: sourceAddr, Destination: destinationAddr}, func(timeout time.Duration) (DirectRouteDestination, error) {
 				return f.handler.PrepareConnection(
-					N.NetworkICMPv4,
+					N.NetworkICMP,
 					M.SocksaddrFrom(sourceAddr, 0),
 					M.SocksaddrFrom(destinationAddr, 0),
 					&ICMPBackWriter{
@@ -120,7 +120,7 @@ func (f *ICMPForwarder) HandlePacket(id stack.TransportEndpointID, pkt *stack.Pa
 		if destinationAddr != f.inet6Address {
 			action, err := f.mapping.Lookup(DirectRouteSession{Source: sourceAddr, Destination: destinationAddr}, func(timeout time.Duration) (DirectRouteDestination, error) {
 				return f.handler.PrepareConnection(
-					N.NetworkICMPv6,
+					N.NetworkICMP,
 					M.SocksaddrFrom(sourceAddr, 0),
 					M.SocksaddrFrom(destinationAddr, 0),
 					&ICMPBackWriter{
diff --git a/stack_system.go b/stack_system.go
index 5797fa9..d09e754 100644
--- a/stack_system.go
+++ b/stack_system.go
@@ -660,7 +660,7 @@ func (s *System) processIPv4ICMP(ipHdr header.IPv4, icmpHdr header.ICMPv4) (bool
 	if destinationAddr != s.inet4Address {
 		action, err := s.directNat.Lookup(DirectRouteSession{Source: sourceAddr, Destination: destinationAddr}, func(timeout time.Duration) (DirectRouteDestination, error) {
 			return s.handler.PrepareConnection(
-				N.NetworkICMPv4,
+				N.NetworkICMP,
 				M.SocksaddrFrom(sourceAddr, 0),
 				M.SocksaddrFrom(destinationAddr, 0),
 				&systemICMPDirectPacketWriter4{s.tun, s.frontHeadroom + PacketOffset, sourceAddr},
@@ -732,7 +732,7 @@ func (s *System) processIPv6ICMP(ipHdr header.IPv6, icmpHdr header.ICMPv6) (bool
 	if destinationAddr != s.inet6Address {
 		action, err := s.directNat.Lookup(DirectRouteSession{Source: sourceAddr, Destination: destinationAddr}, func(timeout time.Duration) (DirectRouteDestination, error) {
 			return s.handler.PrepareConnection(
-				N.NetworkICMPv6,
+				N.NetworkICMP,
 				M.SocksaddrFrom(sourceAddr, 0),
 				M.SocksaddrFrom(destinationAddr, 0),
 				&systemICMPDirectPacketWriter6{s.tun, s.frontHeadroom + PacketOffset, sourceAddr},