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Improve bridge

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This commit is contained in:
世界
2026-08-30 17:41:42 +08:00
parent 1e2f1d04da
commit 97bbf2a9a4
21 changed files with 276 additions and 191 deletions
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protocol/bridge/service_linux.go
+18 -27
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@@ -3,6 +3,7 @@ package bridge
import (
"net"
"net/netip"
_ "unsafe"
"github.com/sagernet/netlink"
"github.com/sagernet/sing-tun"
@@ -65,10 +66,18 @@ func NewService(options ServiceOptions) (*Service, error) {
func (s *Service) start(bridgeName string) error {
s.tunName = tun.CalculateInterfaceName(bridgeName)
s.nftTableName = "sing-box-" + s.tunName
tunFileDescriptor, err := openBridgeTun(s.tunName)
tunFileDescriptor, err := openTUN(s.tunName, true)
if err != nil {
return E.Cause(err, "create bridge tun")
}
err = setTCPOffload(tunFileDescriptor)
if err != nil {
s.logger.Warn(E.Cause(err, "set TCP offload"))
}
err = setUDPOffload(tunFileDescriptor)
if err != nil {
s.logger.Warn(E.Cause(err, "set UDP offload"))
}
s.tunFileDescriptor = tunFileDescriptor
tunLink, err := netlink.LinkByName(s.tunName)
if err != nil {
@@ -223,29 +232,11 @@ func isDefaultDestination(destination *net.IPNet) bool {
return ones == 0
}
func openBridgeTun(name string) (int, error) {
tunFileDescriptor, err := unix.Open("/dev/net/tun", unix.O_RDWR, 0)
if err != nil {
tunFileDescriptor, err = unix.Open("/dev/tun", unix.O_RDWR, 0)
}
if err != nil {
return -1, E.Cause(err, "open tun control device")
}
ifreq, err := unix.NewIfreq(name)
if err != nil {
unix.Close(tunFileDescriptor)
return -1, err
}
ifreq.SetUint16(unix.IFF_TUN | unix.IFF_NO_PI)
err = unix.IoctlIfreq(tunFileDescriptor, unix.TUNSETIFF, ifreq)
if err != nil {
unix.Close(tunFileDescriptor)
return -1, E.Cause(err, "TUNSETIFF")
}
err = unix.SetNonblock(tunFileDescriptor, true)
if err != nil {
unix.Close(tunFileDescriptor)
return -1, E.Cause(err, "set nonblock")
}
return tunFileDescriptor, nil
}
//go:linkname openTUN github.com/sagernet/sing-tun.open
func openTUN(name string, vnetHdr bool) (int, error)
//go:linkname setTCPOffload github.com/sagernet/sing-tun.setTCPOffload
func setTCPOffload(fd int) error
//go:linkname setUDPOffload github.com/sagernet/sing-tun.setUDPOffload
func setUDPOffload(fd int) error