Make gtcpip public for external use

gtcpip/header/checksum.go

@@ -20,8 +20,8 @@ import (
 	"encoding/binary"
 	"fmt"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
 )
 
 // PseudoHeaderChecksum calculates the pseudo-header checksum for the given

gtcpip/header/eth.go

@@ -17,7 +17,7 @@ package header
 import (
 	"encoding/binary"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip"
 )
 
 const (

gtcpip/header/icmpv4.go

@@ -17,8 +17,8 @@ package header
 import (
 	"encoding/binary"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
 )
 
 // ICMPv4 represents an ICMPv4 header stored in a byte array.

gtcpip/header/icmpv6.go

@@ -17,8 +17,8 @@ package header
 import (
 	"encoding/binary"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
 )
 
 // ICMPv6 represents an ICMPv6 header stored in a byte array.

gtcpip/header/interfaces.go

@@ -17,7 +17,7 @@ package header
 import (
 	"net/netip"
 
-	tcpip "github.com/sagernet/sing-tun/internal/gtcpip"
+	tcpip "github.com/sagernet/sing-tun/gtcpip"
 )
 
 const (

gtcpip/header/ipv4.go

@@ -20,8 +20,8 @@ import (
 	"net/netip"
 	"time"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
 	"github.com/sagernet/sing/common"
 )
 

gtcpip/header/ipv6.go

@@ -20,7 +20,7 @@ import (
 	"fmt"
 	"net/netip"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip"
 )
 
 const (

gtcpip/header/ipv6_extension_headers.go

@@ -20,7 +20,7 @@ import (
 	"fmt"
 	"math"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip"
 	"github.com/sagernet/sing/common"
 )
 

gtcpip/header/ipv6_fragment.go

@@ -17,7 +17,7 @@ package header
 import (
 	"encoding/binary"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip"
 )
 
 const (

gtcpip/header/ndp_neighbor_advert.go

@@ -14,7 +14,7 @@
 
 package header
 
-import "github.com/sagernet/sing-tun/internal/gtcpip"
+import "github.com/sagernet/sing-tun/gtcpip"
 
 // NDPNeighborAdvert is an NDP Neighbor Advertisement message. It will
 // only contain the body of an ICMPv6 packet.

gtcpip/header/ndp_neighbor_solicit.go

@@ -14,7 +14,7 @@
 
 package header
 
-import "github.com/sagernet/sing-tun/internal/gtcpip"
+import "github.com/sagernet/sing-tun/gtcpip"
 
 // NDPNeighborSolicit is an NDP Neighbor Solicitation message. It will only
 // contain the body of an ICMPv6 packet.

gtcpip/header/ndp_options.go

@@ -23,7 +23,7 @@ import (
 	"math"
 	"time"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip"
 	"github.com/sagernet/sing/common"
 )
 

gtcpip/header/tcp.go

@@ -17,9 +17,9 @@ package header
 import (
 	"encoding/binary"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
-	"github.com/sagernet/sing-tun/internal/gtcpip/seqnum"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip/seqnum"
 
 	"github.com/google/btree"
 )

gtcpip/header/udp.go

@@ -18,8 +18,8 @@ import (
 	"encoding/binary"
 	"math"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
 )
 
 const (

internal/checksum_test/sum_bench_test.go

@@ -4,7 +4,7 @@ import (
 	"crypto/rand"
 	"testing"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
 	"github.com/sagernet/sing-tun/internal/tschecksum"
 )
 

nfqueue_linux.go

@@ -8,7 +8,7 @@ import (
 	"net/netip"
 	"sync/atomic"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/logger"
 	M "github.com/sagernet/sing/common/metadata"

ping/destination.go

@@ -10,8 +10,7 @@ import (
 	"time"
 
 	"github.com/sagernet/sing-tun"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
-	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -30,7 +29,6 @@ type Destination struct {
 	destination   netip.Addr
 	routeContext  tun.DirectRouteContext
 	timeout       time.Duration
-	lastActive    common.TypedValue[time.Time]
 	requestAccess sync.Mutex
 	requests      map[pingRequest]time.Time
 }
@@ -75,7 +73,6 @@ func ConnectDestination(
 		timeout:      timeout,
 		requests:     make(map[pingRequest]time.Time),
 	}
-	d.lastActive.Store(time.Now())
 	go d.loopRead()
 	return d, nil
 }
@@ -83,21 +80,14 @@ func ConnectDestination(
 func (d *Destination) loopRead() {
 	defer d.Close()
 	for {
-		deadline := d.lastActive.Load().Add(d.timeout)
-		if !time.Now().Before(deadline) {
-			return
-		}
-		err := d.conn.SetReadDeadline(deadline)
+		buffer := buf.NewSize(maxICMPPacketSize)
+		err := d.conn.SetReadDeadline(time.Now().Add(d.timeout))
 		if err != nil {
 			d.logger.ErrorContext(d.ctx, E.Cause(err, "set read deadline for ICMP conn"))
 		}
-		buffer := buf.NewSize(maxICMPPacketSize)
 		err = d.conn.ReadIP(buffer)
 		if err != nil {
 			buffer.Release()
-			if E.IsTimeout(err) {
-				continue
-			}
 			if !E.IsClosed(err) {
 				d.logger.ErrorContext(d.ctx, E.Cause(err, "receive ICMP echo reply"))
 			}
@@ -168,7 +158,6 @@ func (d *Destination) loopRead() {
 			}
 			d.logger.TraceContext(d.ctx, "read ICMPv6 echo reply from ", ipHdr.SourceAddr(), " to ", ipHdr.DestinationAddr(), " id ", icmpHdr.Ident(), " seq ", icmpHdr.Sequence())
 		}
-		d.lastActive.Store(time.Now())
 		err = d.routeContext.WritePacket(buffer.Bytes())
 		if err != nil {
 			d.logger.ErrorContext(d.ctx, E.Cause(err, "write ICMP echo reply"))
@@ -178,7 +167,6 @@ func (d *Destination) loopRead() {
 }
 
 func (d *Destination) WritePacket(packet *buf.Buffer) error {
-	d.lastActive.Store(time.Now())
 	if !d.destination.Is6() {
 		ipHdr := header.IPv4(packet.Bytes())
 		if !ipHdr.IsValid(packet.Len()) {

ping/destination_rewriter.go

@@ -4,7 +4,7 @@ import (
 	"net/netip"
 
 	"github.com/sagernet/sing-tun"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common/buf"
 )
 

ping/ping.go

@@ -9,7 +9,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/control"

ping/ping_test.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"github.com/sagernet/gvisor/pkg/rand"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing-tun/ping"
 	"github.com/sagernet/sing/common/buf"
 

ping/socket_linux_unprivileged.go

@@ -8,7 +8,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/control"

ping/source_rewriter.go

@@ -6,7 +6,7 @@ import (
 	"sync"
 
 	"github.com/sagernet/sing-tun"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common/logger"
 )
 

stack_gvisor_tcp.go

@@ -11,7 +11,7 @@ import (
 	"github.com/sagernet/gvisor/pkg/tcpip/header"
 	"github.com/sagernet/gvisor/pkg/tcpip/stack"
 	"github.com/sagernet/gvisor/pkg/tcpip/transport/tcp"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
 	"github.com/sagernet/sing/common"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"

stack_mixed.go

@@ -12,7 +12,7 @@ import (
 	"github.com/sagernet/gvisor/pkg/tcpip/link/channel"
 	"github.com/sagernet/gvisor/pkg/tcpip/stack"
 	"github.com/sagernet/gvisor/pkg/tcpip/transport/udp"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common/buf"
 	E "github.com/sagernet/sing/common/exceptions"
 )

stack_system.go

@@ -8,8 +8,8 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/control"

stack_system_packet.go

@@ -4,7 +4,7 @@ import (
 	"net/netip"
 	"syscall"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common"
 )
 

tun_darwin.go

@@ -9,7 +9,7 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	rawfile "github.com/sagernet/sing-tun/internal/rawfile_darwin"
 	"github.com/sagernet/sing-tun/internal/stopfd_darwin"
 	"github.com/sagernet/sing/common"

tun_linux.go

@@ -14,8 +14,8 @@ import (
 	"unsafe"
 
 	"github.com/sagernet/netlink"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"

tun_offload.go

@@ -4,9 +4,9 @@ import (
 	"encoding/binary"
 	"fmt"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 )
 
 // GSOType represents the type of segmentation offload.

tun_offload_linux.go

@@ -14,9 +14,9 @@ import (
 	"slices"
 	"unsafe"
 
-	"github.com/sagernet/sing-tun/internal/gtcpip"
-	"github.com/sagernet/sing-tun/internal/gtcpip/checksum"
-	"github.com/sagernet/sing-tun/internal/gtcpip/header"
+	"github.com/sagernet/sing-tun/gtcpip"
+	"github.com/sagernet/sing-tun/gtcpip/checksum"
+	"github.com/sagernet/sing-tun/gtcpip/header"
 
 	"golang.org/x/sys/unix"
 )