vendor/golang.org/x/net/internal/socks/socks.go

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package socks provides a SOCKS version 5 client implementation.
//
// SOCKS protocol version 5 is defined in RFC 1928.
// Username/Password authentication for SOCKS version 5 is defined in
// RFC 1929.
package socks

import (
	"context"
	"errors"
	"io"
	"net"
	"strconv"
)

// A Command represents a SOCKS command.
type Command int

func (cmd Command) String() string {
	switch cmd {
	case CmdConnect:
		return "socks connect"
	case cmdBind:
		return "socks bind"
	default:
		return "socks " + strconv.Itoa(int(cmd))
	}
}

// An AuthMethod represents a SOCKS authentication method.
type AuthMethod int

// A Reply represents a SOCKS command reply code.
type Reply int

func (code Reply) String() string {
	switch code {
	case StatusSucceeded:
		return "succeeded"
	case 0x01:
		return "general SOCKS server failure"
	case 0x02:
		return "connection not allowed by ruleset"
	case 0x03:
		return "network unreachable"
	case 0x04:
		return "host unreachable"
	case 0x05:
		return "connection refused"
	case 0x06:
		return "TTL expired"
	case 0x07:
		return "command not supported"
	case 0x08:
		return "address type not supported"
	default: