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add bind for relay

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This commit is contained in:
ginuerzh
2021-11-23 23:23:16 +08:00
parent 7beb5bf6d7
commit 98ef6c7492
18 changed files with 391 additions and 201 deletions
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52
pkg/handler/socks/v5/bind.go
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@ -2,23 +2,21 @@ package v5
import (
"context"
"fmt"
"net"
"time"
"github.com/go-gost/gosocks5"
"github.com/go-gost/gost/pkg/chain"
"github.com/go-gost/gost/pkg/handler"
)
func (h *socks5Handler) handleBind(ctx context.Context, conn net.Conn, req *gosocks5.Request) {
addr := req.Addr.String()
func (h *socks5Handler) handleBind(ctx context.Context, conn net.Conn, network, address string) {
h.logger = h.logger.WithFields(map[string]interface{}{
"dst": addr,
"dst": fmt.Sprintf("%s/%s", address, network),
"cmd": "bind",
})
h.logger.Infof("%s >> %s", conn.RemoteAddr(), addr)
h.logger.Infof("%s >> %s", conn.RemoteAddr(), address)
if !h.md.enableBind {
reply := gosocks5.NewReply(gosocks5.NotAllowed, nil)
@ -28,41 +26,12 @@ func (h *socks5Handler) handleBind(ctx context.Context, conn net.Conn, req *goso
return
}
if h.chain.IsEmpty() {
h.bindLocal(ctx, conn, addr)
return
}
r := (&chain.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)
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)
h.logger.Debug(resp)
return
}
h.logger.Infof("%s <-> %s", conn.RemoteAddr(), addr)
handler.Transport(conn, cc)
h.logger.Infof("%s >-< %s", conn.RemoteAddr(), addr)
// BIND does not support chain.
h.bindLocal(ctx, conn, network, address)
}
func (h *socks5Handler) bindLocal(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
func (h *socks5Handler) bindLocal(ctx context.Context, conn net.Conn, network, address string) {
ln, err := net.Listen(network, address) // 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)
@ -90,9 +59,10 @@ func (h *socks5Handler) bindLocal(ctx context.Context, conn net.Conn, addr strin
h.logger.Debug(reply)
h.logger = h.logger.WithFields(map[string]interface{}{
"bind": socksAddr.String(),
"bind": fmt.Sprintf("%s/%s", ln.Addr(), ln.Addr().Network()),
})
h.logger.Debugf("bind on %s OK", &socksAddr)
h.logger.Debugf("bind on %s OK", ln.Addr())
h.serveBind(ctx, conn, ln)
}