mirror of https://gitee.com/IrisVega/frp.git
107 lines
2.5 KiB
Go
107 lines
2.5 KiB
Go
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// Copyright 2018 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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"bufio"
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"encoding/base64"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"golang.org/x/net/proxy"
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)
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type ProxyAuth struct {
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Enable bool
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Username string
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Passwd string
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}
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func DialTcpByProxy(proxyStr string, addr string) (c net.Conn, err error) {
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if proxyStr == "" {
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return net.Dial("tcp", addr)
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}
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var proxyUrl *url.URL
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if proxyUrl, err = url.Parse(proxyStr); err != nil {
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return
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}
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auth := &ProxyAuth{}
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if proxyUrl.User != nil {
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auth.Username = proxyUrl.User.Username()
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auth.Passwd, _ = proxyUrl.User.Password()
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}
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switch proxyUrl.Scheme {
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case "http":
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return DialTcpByHttpProxy(proxyUrl.Host, addr, auth)
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case "socks5":
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return DialTcpBySocks5Proxy(proxyUrl.Host, addr, auth)
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default:
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err = fmt.Errorf("Proxy URL scheme must be http or socks5, not [%s]", proxyUrl.Scheme)
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return
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}
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}
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func DialTcpByHttpProxy(proxyHost string, dstAddr string, auth *ProxyAuth) (c net.Conn, err error) {
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if c, err = net.Dial("tcp", proxyHost); err != nil {
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return
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}
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req, err := http.NewRequest("CONNECT", "http://"+dstAddr, nil)
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if err != nil {
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return
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}
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if auth.Enable {
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req.Header.Set("Proxy-Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(auth.Username+":"+auth.Passwd)))
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}
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req.Header.Set("User-Agent", "Mozilla/5.0")
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req.Write(c)
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resp, err := http.ReadResponse(bufio.NewReader(c), req)
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if err != nil {
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return nil, err
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}
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resp.Body.Close()
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if resp.StatusCode != 200 {
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err = fmt.Errorf("DialTcpByHttpProxy error, StatusCode [%d]", resp.StatusCode)
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return
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}
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return
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}
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func DialTcpBySocks5Proxy(proxyHost string, dstAddr string, auth *ProxyAuth) (c net.Conn, err error) {
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var s5Auth *proxy.Auth
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if auth.Enable {
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s5Auth = &proxy.Auth{
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User: auth.Username,
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Password: auth.Passwd,
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}
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}
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dialer, err := proxy.SOCKS5("tcp", proxyHost, s5Auth, nil)
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if err != nil {
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return nil, err
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}
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if c, err = dialer.Dial("tcp", dstAddr); err != nil {
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return
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}
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return
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}
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