/
socks5.go
63 lines (53 loc) · 1.32 KB
/
socks5.go
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// Copyright 2022-2024 Sauce Labs Inc., all rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
package dialvia
import (
"context"
"net"
"net/url"
"golang.org/x/net/proxy"
)
type SOCKS5ProxyDialer struct {
dial ContextDialerFunc
proxyURL *url.URL
}
func SOCKS5Proxy(dial ContextDialerFunc, proxyURL *url.URL) *SOCKS5ProxyDialer {
if dial == nil {
panic("dial is required")
}
if proxyURL == nil {
panic("proxy URL is required")
}
if proxyURL.Scheme != "socks5" {
panic("proxy URL scheme must be socks5")
}
return &SOCKS5ProxyDialer{
dial: dial,
proxyURL: proxyURL,
}
}
func (d *SOCKS5ProxyDialer) DialContext(_ context.Context, network, addr string) (net.Conn, error) {
u := d.proxyURL.User
var auth *proxy.Auth
if u != nil {
auth = new(proxy.Auth)
auth.User = u.Username()
if p, ok := u.Password(); ok {
auth.Password = p
}
}
proxyHost := d.proxyURL.Hostname()
proxyPort := d.proxyURL.Port()
if proxyPort == "" {
proxyPort = "1080"
}
proxyAddr := net.JoinHostPort(proxyHost, proxyPort)
sd, err := proxy.SOCKS5("tcp", proxyAddr, auth, d.dial)
if err != nil {
return nil, err
}
return sd.Dial(network, addr)
}