93 lines
2 KiB
Go
93 lines
2 KiB
Go
package socks
|
|
|
|
import (
|
|
"net"
|
|
|
|
"github.com/Dreamacro/clash/adapter/inbound"
|
|
"github.com/Dreamacro/clash/common/pool"
|
|
"github.com/Dreamacro/clash/common/sockopt"
|
|
C "github.com/Dreamacro/clash/constant"
|
|
"github.com/Dreamacro/clash/log"
|
|
"github.com/Dreamacro/clash/transport/socks5"
|
|
)
|
|
|
|
type UDPListener struct {
|
|
packetConn net.PacketConn
|
|
addr string
|
|
closed bool
|
|
name string
|
|
specialRules string
|
|
}
|
|
|
|
// RawAddress implements C.Listener
|
|
func (l *UDPListener) RawAddress() string {
|
|
return l.addr
|
|
}
|
|
|
|
// Address implements C.Listener
|
|
func (l *UDPListener) Address() string {
|
|
return l.packetConn.LocalAddr().String()
|
|
}
|
|
|
|
// Close implements C.Listener
|
|
func (l *UDPListener) Close() error {
|
|
l.closed = true
|
|
return l.packetConn.Close()
|
|
}
|
|
|
|
func NewUDP(addr string, in chan<- C.PacketAdapter) (*UDPListener, error) {
|
|
return NewUDPWithInfos(addr, "DEFAULT-SOCKS", "", in)
|
|
}
|
|
|
|
func NewUDPWithInfos(addr, name, specialRules string, in chan<- C.PacketAdapter) (*UDPListener, error) {
|
|
l, err := net.ListenPacket("udp", addr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := sockopt.UDPReuseaddr(l.(*net.UDPConn)); err != nil {
|
|
log.Warnln("Failed to Reuse UDP Address: %s", err)
|
|
}
|
|
|
|
sl := &UDPListener{
|
|
packetConn: l,
|
|
addr: addr,
|
|
specialRules: specialRules,
|
|
name: name,
|
|
}
|
|
go func() {
|
|
for {
|
|
buf := pool.Get(pool.UDPBufferSize)
|
|
n, remoteAddr, err := l.ReadFrom(buf)
|
|
if err != nil {
|
|
pool.Put(buf)
|
|
if sl.closed {
|
|
break
|
|
}
|
|
continue
|
|
}
|
|
handleSocksUDP(sl.name, sl.specialRules, l, in, buf[:n], remoteAddr)
|
|
}
|
|
}()
|
|
|
|
return sl, nil
|
|
}
|
|
|
|
func handleSocksUDP(name, specialRules string, pc net.PacketConn, in chan<- C.PacketAdapter, buf []byte, addr net.Addr) {
|
|
target, payload, err := socks5.DecodeUDPPacket(buf)
|
|
if err != nil {
|
|
// Unresolved UDP packet, return buffer to the pool
|
|
pool.Put(buf)
|
|
return
|
|
}
|
|
packet := &packet{
|
|
pc: pc,
|
|
rAddr: addr,
|
|
payload: payload,
|
|
bufRef: buf,
|
|
}
|
|
select {
|
|
case in <- inbound.NewPacketWithInfos(target, packet, C.SOCKS5, name, specialRules):
|
|
default:
|
|
}
|
|
}
|