89 lines
1.7 KiB
Go
89 lines
1.7 KiB
Go
package relay
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/go-gost/gost/pkg/handler"
|
|
"github.com/go-gost/relay"
|
|
)
|
|
|
|
func (h *relayHandler) handleConnect(ctx context.Context, conn net.Conn, network, address string) {
|
|
h.logger = h.logger.WithFields(map[string]interface{}{
|
|
"dst": fmt.Sprintf("%s/%s", address, network),
|
|
"cmd": "connect",
|
|
})
|
|
|
|
h.logger.Infof("%s >> %s", conn.RemoteAddr(), address)
|
|
|
|
resp := relay.Response{
|
|
Version: relay.Version1,
|
|
Status: relay.StatusOK,
|
|
}
|
|
|
|
if address == "" {
|
|
resp.Status = relay.StatusBadRequest
|
|
resp.WriteTo(conn)
|
|
h.logger.Error("target not specified")
|
|
return
|
|
}
|
|
|
|
if h.options.Bypass != nil && h.options.Bypass.Contains(address) {
|
|
h.logger.Info("bypass: ", address)
|
|
resp.Status = relay.StatusForbidden
|
|
resp.WriteTo(conn)
|
|
return
|
|
}
|
|
|
|
cc, err := h.router.Dial(ctx, network, address)
|
|
if err != nil {
|
|
resp.Status = relay.StatusNetworkUnreachable
|
|
resp.WriteTo(conn)
|
|
return
|
|
}
|
|
defer cc.Close()
|
|
|
|
if h.md.noDelay {
|
|
if _, err := resp.WriteTo(conn); err != nil {
|
|
h.logger.Error(err)
|
|
return
|
|
}
|
|
}
|
|
|
|
switch network {
|
|
case "udp", "udp4", "udp6":
|
|
rc := &udpConn{
|
|
Conn: conn,
|
|
}
|
|
if !h.md.noDelay {
|
|
// cache the header
|
|
if _, err := resp.WriteTo(&rc.wbuf); err != nil {
|
|
return
|
|
}
|
|
}
|
|
conn = rc
|
|
default:
|
|
rc := &tcpConn{
|
|
Conn: conn,
|
|
}
|
|
if !h.md.noDelay {
|
|
// cache the header
|
|
if _, err := resp.WriteTo(&rc.wbuf); err != nil {
|
|
return
|
|
}
|
|
}
|
|
conn = rc
|
|
}
|
|
|
|
t := time.Now()
|
|
h.logger.Infof("%s <-> %s", conn.RemoteAddr(), address)
|
|
handler.Transport(conn, cc)
|
|
h.logger.
|
|
WithFields(map[string]interface{}{
|
|
"duration": time.Since(t),
|
|
}).
|
|
Infof("%s >-< %s", conn.RemoteAddr(), address)
|
|
}
|