rename models to pkg (#2005)

pkg/util/tcpmux/httpconnect.go

@@ -0,0 +1,68 @@
+// Copyright 2020 guylewin, guy@lewin.co.il
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcpmux
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"time"
+
+	"github.com/fatedier/frp/pkg/util/util"
+	"github.com/fatedier/frp/pkg/util/vhost"
+)
+
+type HTTPConnectTCPMuxer struct {
+	*vhost.Muxer
+}
+
+func NewHTTPConnectTCPMuxer(listener net.Listener, timeout time.Duration) (*HTTPConnectTCPMuxer, error) {
+	mux, err := vhost.NewMuxer(listener, getHostFromHTTPConnect, nil, sendHTTPOk, nil, timeout)
+	return &HTTPConnectTCPMuxer{mux}, err
+}
+
+func readHTTPConnectRequest(rd io.Reader) (host string, err error) {
+	bufioReader := bufio.NewReader(rd)
+
+	req, err := http.ReadRequest(bufioReader)
+	if err != nil {
+		return
+	}
+
+	if req.Method != "CONNECT" {
+		err = fmt.Errorf("connections to tcp vhost must be of method CONNECT")
+		return
+	}
+
+	host = util.GetHostFromAddr(req.Host)
+	return
+}
+
+func sendHTTPOk(c net.Conn) error {
+	return util.OkResponse().Write(c)
+}
+
+func getHostFromHTTPConnect(c net.Conn) (_ net.Conn, _ map[string]string, err error) {
+	reqInfoMap := make(map[string]string, 0)
+	host, err := readHTTPConnectRequest(c)
+	if err != nil {
+		return nil, reqInfoMap, err
+	}
+	reqInfoMap["Host"] = host
+	reqInfoMap["Scheme"] = "tcp"
+	return c, reqInfoMap, nil
+}