rename models to pkg (#2005)

pkg/util/net/tls.go

@@ -0,0 +1,57 @@
+// Copyright 2019 fatedier, fatedier@gmail.com
+//
+// 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 net
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net"
+	"time"
+
+	gnet "github.com/fatedier/golib/net"
+)
+
+var (
+	FRPTLSHeadByte = 0x17
+)
+
+func WrapTLSClientConn(c net.Conn, tlsConfig *tls.Config) (out net.Conn) {
+	c.Write([]byte{byte(FRPTLSHeadByte)})
+	out = tls.Client(c, tlsConfig)
+	return
+}
+
+func CheckAndEnableTLSServerConnWithTimeout(c net.Conn, tlsConfig *tls.Config, tlsOnly bool, timeout time.Duration) (out net.Conn, err error) {
+	sc, r := gnet.NewSharedConnSize(c, 2)
+	buf := make([]byte, 1)
+	var n int
+	c.SetReadDeadline(time.Now().Add(timeout))
+	n, err = r.Read(buf)
+	c.SetReadDeadline(time.Time{})
+	if err != nil {
+		return
+	}
+
+	if n == 1 && int(buf[0]) == FRPTLSHeadByte {
+		out = tls.Server(c, tlsConfig)
+	} else {
+		if tlsOnly {
+			err = fmt.Errorf("non-TLS connection received on a TlsOnly server")
+			return
+		}
+		out = sc
+	}
+	return
+}