add socks5 udp relay
This commit is contained in:
155
pkg/handler/socks/v5/mbind.go
Normal file
155
pkg/handler/socks/v5/mbind.go
Normal file
@ -0,0 +1,155 @@
|
||||
package v5
|
||||
|
||||
import (
|
||||
"context"
|
||||
"net"
|
||||
"time"
|
||||
|
||||
"github.com/go-gost/gosocks5"
|
||||
"github.com/go-gost/gost/pkg/handler"
|
||||
"github.com/go-gost/gost/pkg/internal/utils/mux"
|
||||
"github.com/go-gost/gost/pkg/logger"
|
||||
)
|
||||
|
||||
func (h *socks5Handler) handleMuxBind(ctx context.Context, conn net.Conn, req *gosocks5.Request) {
|
||||
addr := req.Addr.String()
|
||||
|
||||
h.logger = h.logger.WithFields(map[string]interface{}{
|
||||
"dst": addr,
|
||||
"cmd": "mbind",
|
||||
})
|
||||
|
||||
h.logger.Infof("%s >> %s", conn.RemoteAddr(), addr)
|
||||
|
||||
if h.chain.IsEmpty() {
|
||||
h.muxBindLocal(ctx, conn, addr)
|
||||
return
|
||||
}
|
||||
|
||||
r := (&handler.Router{}).
|
||||
WithChain(h.chain).
|
||||
WithRetry(h.md.retryCount).
|
||||
WithLogger(h.logger)
|
||||
cc, err := r.Connect(ctx)
|
||||
if err != nil {
|
||||
resp := gosocks5.NewReply(gosocks5.Failure, nil)
|
||||
resp.Write(conn)
|
||||
if h.logger.IsLevelEnabled(logger.DebugLevel) {
|
||||
h.logger.Debug(resp)
|
||||
}
|
||||
return
|
||||
}
|
||||
defer cc.Close()
|
||||
|
||||
// forward request
|
||||
if err := req.Write(cc); err != nil {
|
||||
h.logger.Error(err)
|
||||
resp := gosocks5.NewReply(gosocks5.NetUnreachable, nil)
|
||||
resp.Write(conn)
|
||||
if h.logger.IsLevelEnabled(logger.DebugLevel) {
|
||||
h.logger.Debug(resp)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
t := time.Now()
|
||||
h.logger.Infof("%s <-> %s", conn.RemoteAddr(), addr)
|
||||
handler.Transport(conn, cc)
|
||||
h.logger.
|
||||
WithFields(map[string]interface{}{
|
||||
"duration": time.Since(t),
|
||||
}).
|
||||
Infof("%s >-< %s", conn.RemoteAddr(), addr)
|
||||
}
|
||||
|
||||
func (h *socks5Handler) muxBindLocal(ctx context.Context, conn net.Conn, addr string) {
|
||||
bindAddr, _ := net.ResolveTCPAddr("tcp", addr)
|
||||
ln, err := net.ListenTCP("tcp", bindAddr) // strict mode: if the port already in use, it will return error
|
||||
if err != nil {
|
||||
h.logger.Error(err)
|
||||
reply := gosocks5.NewReply(gosocks5.Failure, nil)
|
||||
if err := reply.Write(conn); err != nil {
|
||||
h.logger.Error(err)
|
||||
}
|
||||
if h.logger.IsLevelEnabled(logger.DebugLevel) {
|
||||
h.logger.Debug(reply.String())
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
socksAddr, err := gosocks5.NewAddr(ln.Addr().String())
|
||||
if err != nil {
|
||||
h.logger.Warn(err)
|
||||
socksAddr = &gosocks5.Addr{
|
||||
Type: gosocks5.AddrIPv4,
|
||||
}
|
||||
}
|
||||
|
||||
// Issue: may not reachable when host has multi-interface
|
||||
socksAddr.Host, _, _ = net.SplitHostPort(conn.LocalAddr().String())
|
||||
reply := gosocks5.NewReply(gosocks5.Succeeded, socksAddr)
|
||||
if err := reply.Write(conn); err != nil {
|
||||
h.logger.Error(err)
|
||||
ln.Close()
|
||||
return
|
||||
}
|
||||
if h.logger.IsLevelEnabled(logger.DebugLevel) {
|
||||
h.logger.Debug(reply.String())
|
||||
}
|
||||
|
||||
h.logger = h.logger.WithFields(map[string]interface{}{
|
||||
"bind": socksAddr.String(),
|
||||
})
|
||||
h.logger.Infof("bind on: %s OK", socksAddr.String())
|
||||
|
||||
h.serveMuxBind(ctx, conn, ln)
|
||||
}
|
||||
|
||||
func (h *socks5Handler) serveMuxBind(ctx context.Context, conn net.Conn, ln net.Listener) {
|
||||
// Upgrade connection to multiplex stream.
|
||||
session, err := mux.NewMuxSession(conn)
|
||||
if err != nil {
|
||||
h.logger.Error(err)
|
||||
return
|
||||
}
|
||||
defer session.Close()
|
||||
|
||||
go func() {
|
||||
defer ln.Close()
|
||||
for {
|
||||
conn, err := session.Accept()
|
||||
if err != nil {
|
||||
h.logger.Error(err)
|
||||
return
|
||||
}
|
||||
conn.Close() // we do not handle incoming connections.
|
||||
}
|
||||
}()
|
||||
|
||||
for {
|
||||
rc, err := ln.Accept()
|
||||
if err != nil {
|
||||
h.logger.Error(err)
|
||||
return
|
||||
}
|
||||
h.logger.Infof("peer accepted: %s", rc.RemoteAddr().String())
|
||||
|
||||
go func(c net.Conn) {
|
||||
defer c.Close()
|
||||
|
||||
sc, err := session.GetConn()
|
||||
if err != nil {
|
||||
h.logger.Error(err)
|
||||
return
|
||||
}
|
||||
defer sc.Close()
|
||||
|
||||
t := time.Now()
|
||||
h.logger.Infof("%s <-> %s", conn.RemoteAddr(), c.RemoteAddr().String())
|
||||
handler.Transport(sc, c)
|
||||
h.logger.
|
||||
WithFields(map[string]interface{}{"duration": time.Since(t)}).
|
||||
Infof("%s >-< %s", conn.RemoteAddr(), c.RemoteAddr().String())
|
||||
}(rc)
|
||||
}
|
||||
}
|
Reference in New Issue
Block a user