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Merge branch 'dev' of https://github.com/Dreamacro/clash into Alpha

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This commit is contained in:
wwqgtxx 2023-01-01 13:03:30 +08:00
commit 7a64c432b1
2 changed files with 28 additions and 27 deletions
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5
dns/util.go
View file

@ -28,6 +28,11 @@ const (
)
func putMsgToCache(c *cache.LruCache[string, *D.Msg], key string, msg *D.Msg) {
// skip dns cache for acme challenge
if q := msg.Question[0]; q.Qtype == D.TypeTXT && strings.HasPrefix(q.Name, "_acme-challenge") {
log.Debugln("[DNS] dns cache ignored because of acme challenge for: %s", q.Name)
return
}
var ttl uint32
switch {
case len(msg.Answer) != 0:

50
listener/redir/tcp_linux.go
View file

@ -1,12 +1,16 @@
package redir
import (
"encoding/binary"
"errors"
"net"
"net/netip"
"syscall"
"unsafe"
"github.com/Dreamacro/clash/transport/socks5"
"golang.org/x/sys/unix"
)
const (
@ -25,44 +29,36 @@ func parserPacket(conn net.Conn) (socks5.Addr, error) {
return nil, err
}
var addr socks5.Addr
var addr netip.AddrPort
rc.Control(func(fd uintptr) {
if ip4 := c.LocalAddr().(*net.TCPAddr).IP.To4(); ip4 != nil {
addr, err = getorigdst(fd)
if err != nil {
} else {
addr, err = getorigdst6(fd)
}
})
return addr, err
return socks5.AddrFromStdAddrPort(addr), err
}
// Call getorigdst() from linux/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
func getorigdst(fd uintptr) (socks5.Addr, error) {
raw := syscall.RawSockaddrInet4{}
siz := uint32(unsafe.Sizeof(raw))
if err := socketcall(GETSOCKOPT, fd, syscall.IPPROTO_IP, SO_ORIGINAL_DST, uintptr(unsafe.Pointer(&raw)), uintptr(unsafe.Pointer(&siz)), 0); err != nil {
return nil, err
func getorigdst(fd uintptr) (netip.AddrPort, error) {
addr := unix.RawSockaddrInet4{}
size := uint32(unsafe.Sizeof(addr))
if err := socketcall(GETSOCKOPT, fd, syscall.IPPROTO_IP, SO_ORIGINAL_DST, uintptr(unsafe.Pointer(&addr)), uintptr(unsafe.Pointer(&size)), 0); err != nil {
return netip.AddrPort{}, err
}
port := binary.BigEndian.Uint16((*(*[2]byte)(unsafe.Pointer(&addr.Port)))[:])
return netip.AddrPortFrom(netip.AddrFrom4(addr.Addr), port), nil
}
addr := make([]byte, 1+net.IPv4len+2)
addr[0] = socks5.AtypIPv4
copy(addr[1:1+net.IPv4len], raw.Addr[:])
port := (*[2]byte)(unsafe.Pointer(&raw.Port)) // big-endian
addr[1+net.IPv4len], addr[1+net.IPv4len+1] = port[0], port[1]
return addr, nil
func getorigdst6(fd uintptr) (netip.AddrPort, error) {
addr := unix.RawSockaddrInet6{}
size := uint32(unsafe.Sizeof(addr))
if err := socketcall(GETSOCKOPT, fd, syscall.IPPROTO_IPV6, IP6T_SO_ORIGINAL_DST, uintptr(unsafe.Pointer(&addr)), uintptr(unsafe.Pointer(&size)), 0); err != nil {
return netip.AddrPort{}, err
}
func getorigdst6(fd uintptr) (socks5.Addr, error) {
raw := syscall.RawSockaddrInet6{}
siz := uint32(unsafe.Sizeof(raw))
if err := socketcall(GETSOCKOPT, fd, syscall.IPPROTO_IPV6, IP6T_SO_ORIGINAL_DST, uintptr(unsafe.Pointer(&raw)), uintptr(unsafe.Pointer(&siz)), 0); err != nil {
return nil, err
}
addr := make([]byte, 1+net.IPv6len+2)
addr[0] = socks5.AtypIPv6
copy(addr[1:1+net.IPv6len], raw.Addr[:])
port := (*[2]byte)(unsafe.Pointer(&raw.Port)) // big-endian
addr[1+net.IPv6len], addr[1+net.IPv6len+1] = port[0], port[1]
return addr, nil
port := binary.BigEndian.Uint16((*(*[2]byte)(unsafe.Pointer(&addr.Port)))[:])
return netip.AddrPortFrom(netip.AddrFrom16(addr.Addr), port), nil
}