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Chore: IpToAddr

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This commit is contained in:
yaling888 2022-04-19 17:46:13 +08:00 committed by adlyq
parent 42d853a7e6
commit 6c4791480e
14 changed files with 136 additions and 119 deletions
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53
common/nnip/netip.go Normal file
View file

@ -0,0 +1,53 @@
package nnip
import (
"encoding/binary"
"net"
"net/netip"
)
// IpToAddr converts the net.IP to netip.Addr.
// If slice's length is not 4 or 16, IpToAddr returns netip.Addr{}
func IpToAddr(slice net.IP) netip.Addr {
ip := slice
if len(ip) != 4 {
if ip = slice.To4(); ip == nil {
ip = slice
}
}
if addr, ok := netip.AddrFromSlice(ip); ok {
return addr
}
return netip.Addr{}
}
// UnMasked returns p's last IP address.
// If p is invalid, UnMasked returns netip.Addr{}
func UnMasked(p netip.Prefix) netip.Addr {
if !p.IsValid() {
return netip.Addr{}
}
buf := p.Addr().As16()
hi := binary.BigEndian.Uint64(buf[:8])
lo := binary.BigEndian.Uint64(buf[8:])
bits := p.Bits()
if bits <= 32 {
bits += 96
}
hi = hi | ^uint64(0)>>bits
lo = lo | ^(^uint64(0) << (128 - bits))
binary.BigEndian.PutUint64(buf[:8], hi)
binary.BigEndian.PutUint64(buf[8:], lo)
addr := netip.AddrFrom16(buf)
if p.Addr().Is4() {
return addr.Unmap()
}
return addr
}

40
component/fakeip/pool.go
View file

@ -1,12 +1,11 @@
package fakeip
import (
"encoding/binary"
"errors"
"math/bits"
"net/netip"
"sync"
"github.com/Dreamacro/clash/common/nnip"
"github.com/Dreamacro/clash/component/profile/cachefile"
"github.com/Dreamacro/clash/component/trie"
)
@ -16,11 +15,6 @@ const (
cycleKey = "key-cycle-fake-ip"
)
type uint128 struct {
hi uint64
lo uint64
}
type store interface {
GetByHost(host string) (netip.Addr, bool)
PutByHost(host string, ip netip.Addr)
@ -122,7 +116,7 @@ func (p *Pool) FlushFakeIP() error {
err := p.store.FlushFakeIP()
if err == nil {
p.cycle = false
p.offset = p.first
p.offset = p.first.Prev()
}
return err
}
@ -173,10 +167,10 @@ func New(options Options) (*Pool, error) {
hostAddr = options.IPNet.Masked().Addr()
gateway = hostAddr.Next()
first = gateway.Next().Next()
last = add(hostAddr, 1<<uint64(hostAddr.BitLen()-options.IPNet.Bits())-1)
last = nnip.UnMasked(*options.IPNet)
)
if !options.IPNet.IsValid() || !first.Less(last) || !options.IPNet.Contains(last) {
if !options.IPNet.IsValid() || !first.IsValid() || !first.Less(last) {
return nil, errors.New("ipnet don't have valid ip")
}
@ -201,29 +195,3 @@ func New(options Options) (*Pool, error) {
return pool, nil
}
// add returns addr + n.
func add(addr netip.Addr, n uint64) netip.Addr {
buf := addr.As16()
u := uint128{
binary.BigEndian.Uint64(buf[:8]),
binary.BigEndian.Uint64(buf[8:]),
}
lo, carry := bits.Add64(u.lo, n, 0)
u.hi = u.hi + carry
u.lo = lo
binary.BigEndian.PutUint64(buf[:8], u.hi)
binary.BigEndian.PutUint64(buf[8:], u.lo)
a := netip.AddrFrom16(buf)
if addr.Is4() {
return a.Unmap()
}
return a
}

8
component/fakeip/pool_test.go
View file

@ -240,13 +240,15 @@ func TestPool_FlushFileCache(t *testing.T) {
err = pool.FlushFakeIP()
assert.Nil(t, err)
baz := pool.Lookup("foo.com")
next := pool.Lookup("baz.com")
baz := pool.Lookup("foo.com")
nero := pool.Lookup("foo.com")
assert.True(t, foo == fox)
assert.True(t, foo == next)
assert.False(t, foo == baz)
assert.True(t, bar == bax)
assert.True(t, bar == baz)
assert.False(t, bar == next)
assert.True(t, baz == nero)
}
@ -267,13 +269,15 @@ func TestPool_FlushMemoryCache(t *testing.T) {
err := pool.FlushFakeIP()
assert.Nil(t, err)
baz := pool.Lookup("foo.com")
next := pool.Lookup("baz.com")
baz := pool.Lookup("foo.com")
nero := pool.Lookup("foo.com")
assert.True(t, foo == fox)
assert.True(t, foo == next)
assert.False(t, foo == baz)
assert.True(t, bar == bax)
assert.True(t, bar == baz)
assert.False(t, bar == next)
assert.True(t, baz == nero)
}

11
dns/enhancer.go
View file

@ -5,6 +5,7 @@ import (
"net/netip"
"github.com/Dreamacro/clash/common/cache"
"github.com/Dreamacro/clash/common/nnip"
"github.com/Dreamacro/clash/component/fakeip"
C "github.com/Dreamacro/clash/constant"
)
@ -29,7 +30,7 @@ func (h *ResolverEnhancer) IsExistFakeIP(ip net.IP) bool {
}
if pool := h.fakePool; pool != nil {
return pool.Exist(ipToAddr(ip))
return pool.Exist(nnip.IpToAddr(ip))
}
return false
@ -40,7 +41,7 @@ func (h *ResolverEnhancer) IsFakeIP(ip net.IP) bool {
return false
}
addr := ipToAddr(ip)
addr := nnip.IpToAddr(ip)
if pool := h.fakePool; pool != nil {
return pool.IPNet().Contains(addr) && addr != pool.Gateway() && addr != pool.Broadcast()
@ -55,14 +56,14 @@ func (h *ResolverEnhancer) IsFakeBroadcastIP(ip net.IP) bool {
}
if pool := h.fakePool; pool != nil {
return pool.Broadcast() == ipToAddr(ip)
return pool.Broadcast() == nnip.IpToAddr(ip)
}
return false
}
func (h *ResolverEnhancer) FindHostByIP(ip net.IP) (string, bool) {
addr := ipToAddr(ip)
addr := nnip.IpToAddr(ip)
if pool := h.fakePool; pool != nil {
if host, existed := pool.LookBack(addr); existed {
return host, true
@ -80,7 +81,7 @@ func (h *ResolverEnhancer) FindHostByIP(ip net.IP) (string, bool) {
func (h *ResolverEnhancer) InsertHostByIP(ip net.IP, host string) {
if mapping := h.mapping; mapping != nil {
h.mapping.Set(ipToAddr(ip), host)
h.mapping.Set(nnip.IpToAddr(ip), host)
}
}

3
dns/middleware.go
View file

@ -7,6 +7,7 @@ import (
"time"
"github.com/Dreamacro/clash/common/cache"
"github.com/Dreamacro/clash/common/nnip"
"github.com/Dreamacro/clash/component/fakeip"
"github.com/Dreamacro/clash/component/trie"
C "github.com/Dreamacro/clash/constant"
@ -101,7 +102,7 @@ func withMapping(mapping *cache.LruCache[netip.Addr, string]) middleware {
continue
}
mapping.SetWithExpire(ipToAddr(ip), host, time.Now().Add(time.Second*time.Duration(ttl)))
mapping.SetWithExpire(nnip.IpToAddr(ip), host, time.Now().Add(time.Second*time.Duration(ttl)))
}
return msg, nil

17
dns/util.go
View file

@ -5,7 +5,6 @@ import (
"crypto/tls"
"fmt"
"net"
"net/netip"
"time"
"github.com/Dreamacro/clash/common/cache"
@ -115,22 +114,6 @@ func msgToIP(msg *D.Msg) []net.IP {
return ips
}
func ipToAddr(ip net.IP) netip.Addr {
if ip == nil {
return netip.Addr{}
}
l := len(ip)
if l == 4 {
return netip.AddrFrom4(*(*[4]byte)(ip))
} else if l == 16 {
return netip.AddrFrom16(*(*[16]byte)(ip))
} else {
return netip.Addr{}
}
}
type wrapPacketConn struct {
net.PacketConn
rAddr net.Addr

5
listener/tun/ipstack/commons/router_windows.go
View file

@ -6,6 +6,7 @@ import (
"net/netip"
"time"
"github.com/Dreamacro/clash/common/nnip"
"github.com/Dreamacro/clash/listener/tun/device"
"github.com/Dreamacro/clash/listener/tun/device/tun"
"github.com/Dreamacro/clash/log"
@ -226,7 +227,7 @@ func cleanupAddressesOnDisconnectedInterfaces(family winipcfg.AddressFamily, add
continue
}
for address := iface.FirstUnicastAddress; address != nil; address = address.Next {
if ip, _ := netip.AddrFromSlice(address.Address.IP()); addrHash[ip] {
if ip := nnip.IpToAddr(address.Address.IP()); addrHash[ip] {
prefix := netip.PrefixFrom(ip, int(address.OnLinkPrefixLength))
log.Infoln("[TUN] cleaning up stale address %s from interface ‘%s’", prefix.String(), iface.FriendlyName())
_ = iface.LUID.DeleteIPAddress(prefix)
@ -260,7 +261,7 @@ func getAutoDetectInterfaceByFamily(family winipcfg.AddressFamily) (string, erro
}
for gatewayAddress := iface.FirstGatewayAddress; gatewayAddress != nil; gatewayAddress = gatewayAddress.Next {
nextHop, _ := netip.AddrFromSlice(gatewayAddress.Address.IP())
nextHop := nnip.IpToAddr(gatewayAddress.Address.IP())
if _, err = iface.LUID.Route(destination, nextHop); err == nil {
return ifname, nil

24
listener/tun/ipstack/gvisor/handler.go
View file

@ -7,6 +7,7 @@ import (
"time"
"github.com/Dreamacro/clash/adapter/inbound"
"github.com/Dreamacro/clash/common/nnip"
"github.com/Dreamacro/clash/common/pool"
C "github.com/Dreamacro/clash/constant"
D "github.com/Dreamacro/clash/listener/tun/ipstack/commons"
@ -33,20 +34,22 @@ func (gh *GVHandler) HandleTCP(tunConn adapter.TCPConn) {
Zone: "",
}
addrIp, _ := netip.AddrFromSlice(rAddr.IP)
addrPort := netip.AddrPortFrom(addrIp, id.LocalPort)
addrPort := netip.AddrPortFrom(nnip.IpToAddr(rAddr.IP), id.LocalPort)
if D.ShouldHijackDns(gh.DNSAdds, addrPort) {
go func() {
log.Debugln("[TUN] hijack dns tcp: %s", addrPort.String())
defer tunConn.Close()
buf := pool.Get(pool.UDPBufferSize)
defer pool.Put(buf)
defer func() {
_ = pool.Put(buf)
_ = tunConn.Close()
}()
for {
tunConn.SetReadDeadline(time.Now().Add(D.DefaultDnsReadTimeout))
if tunConn.SetReadDeadline(time.Now().Add(D.DefaultDnsReadTimeout)) != nil {
break
}
length := uint16(0)
if err := binary.Read(tunConn, binary.BigEndian, &length); err != nil {
@ -86,8 +89,7 @@ func (gh *GVHandler) HandleUDP(tunConn adapter.UDPConn) {
Zone: "",
}
addrIp, _ := netip.AddrFromSlice(rAddr.IP)
addrPort := netip.AddrPortFrom(addrIp, id.LocalPort)
addrPort := netip.AddrPortFrom(nnip.IpToAddr(rAddr.IP), id.LocalPort)
target := socks5.ParseAddrToSocksAddr(rAddr)
go func() {
@ -96,7 +98,7 @@ func (gh *GVHandler) HandleUDP(tunConn adapter.UDPConn) {
n, addr, err := tunConn.ReadFrom(buf)
if err != nil {
pool.Put(buf)
_ = pool.Put(buf)
break
}
@ -104,7 +106,9 @@ func (gh *GVHandler) HandleUDP(tunConn adapter.UDPConn) {
if D.ShouldHijackDns(gh.DNSAdds, addrPort) {
go func() {
defer pool.Put(buf)
defer func() {
_ = pool.Put(buf)
}()
msg, err1 := D.RelayDnsPacket(payload)
if err1 != nil {

4
listener/tun/ipstack/system/mars/mars.go
View file

@ -13,8 +13,8 @@ type StackListener struct {
udp *nat.UDP
}
func StartListener(device io.ReadWriteCloser, gateway netip.Addr, portal netip.Addr) (*StackListener, error) {
tcp, udp, err := nat.Start(device, gateway, portal)
func StartListener(device io.ReadWriteCloser, gateway, portal, broadcast netip.Addr) (*StackListener, error) {
tcp, udp, err := nat.Start(device, gateway, portal, broadcast)
if err != nil {
return nil, err
}

36
listener/tun/ipstack/system/mars/nat/nat.go
View file

@ -9,11 +9,7 @@ import (
"github.com/Dreamacro/clash/listener/tun/ipstack/system/mars/tcpip"
)
func Start(
device io.ReadWriter,
gateway netip.Addr,
portal netip.Addr,
) (*TCP, *UDP, error) {
func Start(device io.ReadWriter, gateway, portal, broadcast netip.Addr) (*TCP, *UDP, error) {
if !portal.Is4() || !gateway.Is4() {
return nil, nil, net.InvalidAddrError("only ipv4 supported")
}
@ -37,8 +33,10 @@ func Start(
gatewayPort := uint16(listener.Addr().(*net.TCPAddr).Port)
go func() {
defer tcp.Close()
defer udp.Close()
defer func() {
_ = tcp.Close()
_ = udp.Close()
}()
buf := make([]byte, pool.RelayBufferSize)
@ -72,7 +70,7 @@ func Start(
continue
}
if ipv4.Offset() != 0 {
if ipv4.FragmentOffset() != 0 {
continue
}
@ -92,6 +90,12 @@ func Start(
continue
}
destinationIP := ip.DestinationIP()
if !destinationIP.IsGlobalUnicast() || destinationIP == broadcast {
continue
}
switch ip.Protocol() {
case tcpip.TCP:
t := tcpip.TCPPacket(ip.Payload())
@ -99,7 +103,7 @@ func Start(
continue
}
if ip.DestinationIP() == portal {
if destinationIP == portal {
if ip.SourceIP() == gateway && t.SourcePort() == gatewayPort {
tup := tab.tupleOf(t.DestinationPort())
if tup == zeroTuple {
@ -120,7 +124,7 @@ func Start(
} else {
tup := tuple{
SourceAddr: netip.AddrPortFrom(ip.SourceIP(), t.SourcePort()),
DestinationAddr: netip.AddrPortFrom(ip.DestinationIP(), t.DestinationPort()),
DestinationAddr: netip.AddrPortFrom(destinationIP, t.DestinationPort()),
}
port := tab.portOf(tup)
@ -158,10 +162,8 @@ func Start(
i.SetType(tcpip.ICMPTypePingResponse)
source := ip.SourceIP()
destination := ip.DestinationIP()
ip.SetSourceIP(destination)
ip.SetDestinationIP(source)
ip.SetDestinationIP(ip.SourceIP())
ip.SetSourceIP(destinationIP)
ip.ResetChecksum()
i.ResetChecksum()
@ -176,10 +178,8 @@ func Start(
i.SetType(tcpip.ICMPv6EchoReply)
source := ip.SourceIP()
destination := ip.DestinationIP()
ip.SetSourceIP(destination)
ip.SetDestinationIP(source)
ip.SetDestinationIP(ip.SourceIP())
ip.SetSourceIP(destinationIP)
ip.ResetChecksum()
i.ResetChecksum(ip.PseudoSum())

8
listener/tun/ipstack/system/mars/nat/udp.go
View file

@ -7,6 +7,7 @@ import (
"net/netip"
"sync"
"github.com/Dreamacro/clash/common/nnip"
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/listener/tun/ipstack/system/mars/tcpip"
)
@ -71,11 +72,8 @@ func (u *UDP) WriteTo(buf []byte, local net.Addr, remote net.Addr) (int, error)
return 0, net.InvalidAddrError("invalid addr")
}
srcIP, _ := netip.AddrFromSlice(srcAddr.IP)
dstIp, _ := netip.AddrFromSlice(dstAddr.IP)
srcAddrPort := netip.AddrPortFrom(srcIP.Unmap(), uint16(srcAddr.Port))
dstAddrPort := netip.AddrPortFrom(dstIp.Unmap(), uint16(dstAddr.Port))
srcAddrPort := netip.AddrPortFrom(nnip.IpToAddr(srcAddr.IP), uint16(srcAddr.Port))
dstAddrPort := netip.AddrPortFrom(nnip.IpToAddr(dstAddr.IP), uint16(dstAddr.Port))
if !srcAddrPort.Addr().Is4() || !dstAddrPort.Addr().Is4() {
return 0, net.InvalidAddrError("invalid ip version")

6
listener/tun/ipstack/system/mars/tcpip/ip.go
View file

@ -118,12 +118,6 @@ func (p IPv4Packet) SetFlags(flags byte) {
p[6] |= flags << 5
}
func (p IPv4Packet) Offset() uint16 {
offset := binary.BigEndian.Uint16(p[6:8])
return (offset & 0x1fff) * 8
}
func (p IPv4Packet) SourceIP() netip.Addr {
return netip.AddrFrom4([4]byte{p[12], p[13], p[14], p[15]})
}

37
listener/tun/ipstack/system/stack.go
View file

@ -10,6 +10,7 @@ import (
"time"
"github.com/Dreamacro/clash/adapter/inbound"
"github.com/Dreamacro/clash/common/nnip"
"github.com/Dreamacro/clash/common/pool"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/context"
@ -45,11 +46,12 @@ func (s *sysStack) Close() error {
func New(device device.Device, dnsHijack []netip.AddrPort, tunAddress netip.Prefix, tcpIn chan<- C.ConnContext, udpIn chan<- *inbound.PacketAdapter) (ipstack.Stack, error) {
var (
gateway = tunAddress.Masked().Addr().Next()
portal = gateway.Next()
gateway = tunAddress.Masked().Addr().Next()
portal = gateway.Next()
broadcast = nnip.UnMasked(tunAddress)
)
stack, err := mars.StartListener(device, gateway, portal)
stack, err := mars.StartListener(device, gateway, portal, broadcast)
if err != nil {
_ = device.Close()
@ -81,24 +83,26 @@ func New(device device.Device, dnsHijack []netip.AddrPort, tunAddress netip.Pref
lAddr := conn.LocalAddr().(*net.TCPAddr)
rAddr := conn.RemoteAddr().(*net.TCPAddr)
rAddrIp, _ := netip.AddrFromSlice(rAddr.IP)
rAddrPort := netip.AddrPortFrom(rAddrIp, uint16(rAddr.Port))
rAddrPort := netip.AddrPortFrom(nnip.IpToAddr(rAddr.IP), uint16(rAddr.Port))
if rAddrPort.Addr().IsLoopback() {
_ = conn.Close()
continue
}
if D.ShouldHijackDns(dnsAddr, rAddrPort) {
go func() {
log.Debugln("[TUN] hijack dns tcp: %s", rAddrPort.String())
defer func(conn net.Conn) {
_ = conn.Close()
}(conn)
buf := pool.Get(pool.UDPBufferSize)
defer func(buf []byte) {
defer func() {
_ = pool.Put(buf)
}(buf)
_ = conn.Close()
}()
for {
if err = conn.SetReadDeadline(time.Now().Add(C.DefaultTCPTimeout)); err != nil {
if conn.SetReadDeadline(time.Now().Add(C.DefaultTCPTimeout)) != nil {
break
}
@ -162,8 +166,13 @@ func New(device device.Device, dnsHijack []netip.AddrPort, tunAddress netip.Pref
lAddr := lRAddr.(*net.UDPAddr)
rAddr := rRAddr.(*net.UDPAddr)
rAddrIp, _ := netip.AddrFromSlice(rAddr.IP)
rAddrPort := netip.AddrPortFrom(rAddrIp, uint16(rAddr.Port))
rAddrPort := netip.AddrPortFrom(nnip.IpToAddr(rAddr.IP), uint16(rAddr.Port))
if rAddrPort.Addr().IsLoopback() {
_ = pool.Put(buf)
continue
}
if D.ShouldHijackDns(dnsAddr, rAddrPort) {
go func() {

3
listener/tun/tun_adapter.go
View file

@ -149,7 +149,8 @@ func setAtLatest(stackType C.TUNStack, devName string) {
switch runtime.GOOS {
case "darwin":
_, _ = cmd.ExecCmd("sysctl net.inet.ip.forwarding=1")
// _, _ = cmd.ExecCmd("sysctl -w net.inet.ip.forwarding=1")
// _, _ = cmd.ExecCmd("sysctl -w net.inet6.ip6.forwarding=1")
case "windows":
_, _ = cmd.ExecCmd("ipconfig /renew")
case "linux":