mirror of
https://gitee.com/IrisVega/frp.git
synced 2024-11-01 22:31:29 +08:00
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
// Copyright 2019 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package net
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import (
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"crypto/tls"
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"fmt"
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"net"
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"time"
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gnet "github.com/fatedier/golib/net"
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)
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var FRPTLSHeadByte = 0x17
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func CheckAndEnableTLSServerConnWithTimeout(
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c net.Conn, tlsConfig *tls.Config, tlsOnly bool, timeout time.Duration,
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) (out net.Conn, isTLS bool, custom bool, err error) {
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sc, r := gnet.NewSharedConnSize(c, 2)
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buf := make([]byte, 1)
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var n int
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_ = c.SetReadDeadline(time.Now().Add(timeout))
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n, err = r.Read(buf)
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_ = c.SetReadDeadline(time.Time{})
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if err != nil {
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return
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}
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switch {
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case n == 1 && int(buf[0]) == FRPTLSHeadByte:
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out = tls.Server(c, tlsConfig)
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isTLS = true
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custom = true
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case n == 1 && int(buf[0]) == 0x16:
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out = tls.Server(sc, tlsConfig)
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isTLS = true
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default:
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if tlsOnly {
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err = fmt.Errorf("non-TLS connection received on a TlsOnly server")
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return
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}
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out = sc
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}
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return
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}
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