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vendor/github.com/pires/go-proxyproto/.gitignore generated vendored Normal file
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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
.idea
bin
pkg

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language: go
sudo: false
go:
- 1.11
install:
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
script:
- go fmt
- go vet
- go test -v -covermode=count -coverprofile=coverage.out
- $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci -repotoken $COVERALLS_TOKEN
env:
global:
secure: 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Apache License
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# go-proxyproto
[![Build Status](https://travis-ci.org/pires/go-proxyproto.svg?branch=master)](https://travis-ci.org/pires/go-proxyproto)
[![Coverage Status](https://coveralls.io/repos/github/pires/go-proxyproto/badge.svg?branch=master)](https://coveralls.io/github/pires/go-proxyproto?branch=master)
[![Go Report Card](https://goreportcard.com/badge/github.com/pires/go-proxyproto)](https://goreportcard.com/report/github.com/pires/go-proxyproto)
A Go library implementation of the [PROXY protocol, versions 1 and 2](http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt),
which provides, as per specification:
> (...) a convenient way to safely transport connection
> information such as a client's address across multiple layers of NAT or TCP
> proxies. It is designed to require little changes to existing components and
> to limit the performance impact caused by the processing of the transported
> information.
This library is to be used in one of or both proxy clients and proxy servers that need to support said protocol.
Both protocol versions, 1 (text-based) and 2 (binary-based) are supported.
## Installation
```shell
$ go get -u github.com/pires/go-proxyproto
```
## Usage
### Client (TODO)
### Server (TODO)
## Documentation
[http://godoc.org/github.com/pires/go-proxyproto](http://godoc.org/github.com/pires/go-proxyproto)

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package proxyproto
// AddressFamilyAndProtocol represents address family and transport protocol.
type AddressFamilyAndProtocol byte
const (
UNSPEC = '\x00'
TCPv4 = '\x11'
UDPv4 = '\x12'
TCPv6 = '\x21'
UDPv6 = '\x22'
UnixStream = '\x31'
UnixDatagram = '\x32'
)
var supportedTransportProtocol = map[AddressFamilyAndProtocol]bool{
TCPv4: true,
UDPv4: true,
TCPv6: true,
UDPv6: true,
UnixStream: true,
UnixDatagram: true,
}
// IsIPv4 returns true if the address family is IPv4 (AF_INET4), false otherwise.
func (ap AddressFamilyAndProtocol) IsIPv4() bool {
return 0x10 == ap&0xF0
}
// IsIPv6 returns true if the address family is IPv6 (AF_INET6), false otherwise.
func (ap AddressFamilyAndProtocol) IsIPv6() bool {
return 0x20 == ap&0xF0
}
// IsUnix returns true if the address family is UNIX (AF_UNIX), false otherwise.
func (ap AddressFamilyAndProtocol) IsUnix() bool {
return 0x30 == ap&0xF0
}
// IsStream returns true if the transport protocol is TCP or STREAM (SOCK_STREAM), false otherwise.
func (ap AddressFamilyAndProtocol) IsStream() bool {
return 0x01 == ap&0x0F
}
// IsDatagram returns true if the transport protocol is UDP or DGRAM (SOCK_DGRAM), false otherwise.
func (ap AddressFamilyAndProtocol) IsDatagram() bool {
return 0x02 == ap&0x0F
}
// IsUnspec returns true if the transport protocol or address family is unspecified, false otherwise.
func (ap AddressFamilyAndProtocol) IsUnspec() bool {
return (0x00 == ap&0xF0) || (0x00 == ap&0x0F)
}
func (ap AddressFamilyAndProtocol) toByte() byte {
if ap.IsIPv4() && ap.IsStream() {
return TCPv4
} else if ap.IsIPv4() && ap.IsDatagram() {
return UDPv4
} else if ap.IsIPv6() && ap.IsStream() {
return TCPv6
} else if ap.IsIPv6() && ap.IsDatagram() {
return UDPv6
} else if ap.IsUnix() && ap.IsStream() {
return UnixStream
} else if ap.IsUnix() && ap.IsDatagram() {
return UnixDatagram
}
return UNSPEC
}

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// Package proxyproto implements Proxy Protocol (v1 and v2) parser and writer, as per specification:
// http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt
package proxyproto
import (
"bufio"
"bytes"
"errors"
"io"
"net"
"time"
)
var (
// Protocol
SIGV1 = []byte{'\x50', '\x52', '\x4F', '\x58', '\x59'}
SIGV2 = []byte{'\x0D', '\x0A', '\x0D', '\x0A', '\x00', '\x0D', '\x0A', '\x51', '\x55', '\x49', '\x54', '\x0A'}
ErrCantReadProtocolVersionAndCommand = errors.New("Can't read proxy protocol version and command")
ErrCantReadAddressFamilyAndProtocol = errors.New("Can't read address family or protocol")
ErrCantReadLength = errors.New("Can't read length")
ErrCantResolveSourceUnixAddress = errors.New("Can't resolve source Unix address")
ErrCantResolveDestinationUnixAddress = errors.New("Can't resolve destination Unix address")
ErrNoProxyProtocol = errors.New("Proxy protocol signature not present")
ErrUnknownProxyProtocolVersion = errors.New("Unknown proxy protocol version")
ErrUnsupportedProtocolVersionAndCommand = errors.New("Unsupported proxy protocol version and command")
ErrUnsupportedAddressFamilyAndProtocol = errors.New("Unsupported address family and protocol")
ErrInvalidLength = errors.New("Invalid length")
ErrInvalidAddress = errors.New("Invalid address")
ErrInvalidPortNumber = errors.New("Invalid port number")
)
// Header is the placeholder for proxy protocol header.
type Header struct {
Version byte
Command ProtocolVersionAndCommand
TransportProtocol AddressFamilyAndProtocol
SourceAddress net.IP
DestinationAddress net.IP
SourcePort uint16
DestinationPort uint16
}
// EqualTo returns true if headers are equivalent, false otherwise.
func (header *Header) EqualTo(q *Header) bool {
if header == nil || q == nil {
return false
}
if header.Command.IsLocal() {
return true
}
return header.TransportProtocol == q.TransportProtocol &&
header.SourceAddress.String() == q.SourceAddress.String() &&
header.DestinationAddress.String() == q.DestinationAddress.String() &&
header.SourcePort == q.SourcePort &&
header.DestinationPort == q.DestinationPort
}
// WriteTo renders a proxy protocol header in a format to write over the wire.
func (header *Header) WriteTo(w io.Writer) (int64, error) {
switch header.Version {
case 1:
return header.writeVersion1(w)
case 2:
return header.writeVersion2(w)
default:
return 0, ErrUnknownProxyProtocolVersion
}
}
// Read identifies the proxy protocol version and reads the remaining of
// the header, accordingly.
//
// If proxy protocol header signature is not present, the reader buffer remains untouched
// and is safe for reading outside of this code.
//
// If proxy protocol header signature is present but an error is raised while processing
// the remaining header, assume the reader buffer to be in a corrupt state.
// Also, this operation will block until enough bytes are available for peeking.
func Read(reader *bufio.Reader) (*Header, error) {
// In order to improve speed for small non-PROXYed packets, take a peek at the first byte alone.
if b1, err := reader.Peek(1); err == nil && (bytes.Equal(b1[:1], SIGV1[:1]) || bytes.Equal(b1[:1], SIGV2[:1])) {
if signature, err := reader.Peek(5); err == nil && bytes.Equal(signature[:5], SIGV1) {
return parseVersion1(reader)
} else if signature, err := reader.Peek(12); err == nil && bytes.Equal(signature[:12], SIGV2) {
return parseVersion2(reader)
}
}
return nil, ErrNoProxyProtocol
}
// ReadTimeout acts as Read but takes a timeout. If that timeout is reached, it's assumed
// there's no proxy protocol header.
func ReadTimeout(reader *bufio.Reader, timeout time.Duration) (*Header, error) {
type header struct {
h *Header
e error
}
read := make(chan *header, 1)
go func() {
h := &header{}
h.h, h.e = Read(reader)
read <- h
}()
timer := time.NewTimer(timeout)
select {
case result := <-read:
timer.Stop()
return result.h, result.e
case <-timer.C:
return nil, ErrNoProxyProtocol
}
}

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package proxyproto
import (
"bufio"
"bytes"
"io"
"net"
"strconv"
"strings"
)
const (
CRLF = "\r\n"
SEPARATOR = " "
)
func initVersion1() *Header {
header := new(Header)
header.Version = 1
// Command doesn't exist in v1
header.Command = PROXY
return header
}
func parseVersion1(reader *bufio.Reader) (*Header, error) {
// Make sure we have a v1 header
line, err := reader.ReadString('\n')
if !strings.HasSuffix(line, CRLF) {
return nil, ErrCantReadProtocolVersionAndCommand
}
tokens := strings.Split(line[:len(line)-2], SEPARATOR)
if len(tokens) < 6 {
return nil, ErrCantReadProtocolVersionAndCommand
}
header := initVersion1()
// Read address family and protocol
switch tokens[1] {
case "TCP4":
header.TransportProtocol = TCPv4
case "TCP6":
header.TransportProtocol = TCPv6
default:
header.TransportProtocol = UNSPEC
}
// Read addresses and ports
header.SourceAddress, err = parseV1IPAddress(header.TransportProtocol, tokens[2])
if err != nil {
return nil, err
}
header.DestinationAddress, err = parseV1IPAddress(header.TransportProtocol, tokens[3])
if err != nil {
return nil, err
}
header.SourcePort, err = parseV1PortNumber(tokens[4])
if err != nil {
return nil, err
}
header.DestinationPort, err = parseV1PortNumber(tokens[5])
if err != nil {
return nil, err
}
return header, nil
}
func (header *Header) writeVersion1(w io.Writer) (int64, error) {
// As of version 1, only "TCP4" ( \x54 \x43 \x50 \x34 ) for TCP over IPv4,
// and "TCP6" ( \x54 \x43 \x50 \x36 ) for TCP over IPv6 are allowed.
proto := "UNKNOWN"
if header.TransportProtocol == TCPv4 {
proto = "TCP4"
} else if header.TransportProtocol == TCPv6 {
proto = "TCP6"
}
var buf bytes.Buffer
buf.Write(SIGV1)
buf.WriteString(SEPARATOR)
buf.WriteString(proto)
buf.WriteString(SEPARATOR)
buf.WriteString(header.SourceAddress.String())
buf.WriteString(SEPARATOR)
buf.WriteString(header.DestinationAddress.String())
buf.WriteString(SEPARATOR)
buf.WriteString(strconv.Itoa(int(header.SourcePort)))
buf.WriteString(SEPARATOR)
buf.WriteString(strconv.Itoa(int(header.DestinationPort)))
buf.WriteString(CRLF)
return buf.WriteTo(w)
}
func parseV1PortNumber(portStr string) (uint16, error) {
var port uint16
_port, err := strconv.Atoi(portStr)
if err == nil {
if port < 0 || port > 65535 {
err = ErrInvalidPortNumber
}
port = uint16(_port)
}
return port, err
}
func parseV1IPAddress(protocol AddressFamilyAndProtocol, addrStr string) (addr net.IP, err error) {
addr = net.ParseIP(addrStr)
tryV4 := addr.To4()
if (protocol == TCPv4 && tryV4 == nil) || (protocol == TCPv6 && tryV4 != nil) {
err = ErrInvalidAddress
}
return
}

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package proxyproto
import (
"bufio"
"bytes"
"encoding/binary"
"io"
)
var (
lengthV4 = uint16(12)
lengthV6 = uint16(36)
lengthUnix = uint16(218)
lengthV4Bytes = func() []byte {
a := make([]byte, 2)
binary.BigEndian.PutUint16(a, lengthV4)
return a
}()
lengthV6Bytes = func() []byte {
a := make([]byte, 2)
binary.BigEndian.PutUint16(a, lengthV6)
return a
}()
lengthUnixBytes = func() []byte {
a := make([]byte, 2)
binary.BigEndian.PutUint16(a, lengthUnix)
return a
}()
)
type _ports struct {
SrcPort uint16
DstPort uint16
}
type _addr4 struct {
Src [4]byte
Dst [4]byte
SrcPort uint16
DstPort uint16
}
type _addr6 struct {
Src [16]byte
Dst [16]byte
_ports
}
type _addrUnix struct {
Src [108]byte
Dst [108]byte
}
func parseVersion2(reader *bufio.Reader) (header *Header, err error) {
// Skip first 12 bytes (signature)
for i := 0; i < 12; i++ {
if _, err = reader.ReadByte(); err != nil {
return nil, ErrCantReadProtocolVersionAndCommand
}
}
header = new(Header)
header.Version = 2
// Read the 13th byte, protocol version and command
b13, err := reader.ReadByte()
if err != nil {
return nil, ErrCantReadProtocolVersionAndCommand
}
header.Command = ProtocolVersionAndCommand(b13)
if _, ok := supportedCommand[header.Command]; !ok {
return nil, ErrUnsupportedProtocolVersionAndCommand
}
// If command is LOCAL, header ends here
if header.Command.IsLocal() {
return header, nil
}
// Read the 14th byte, address family and protocol
b14, err := reader.ReadByte()
if err != nil {
return nil, ErrCantReadAddressFamilyAndProtocol
}
header.TransportProtocol = AddressFamilyAndProtocol(b14)
if _, ok := supportedTransportProtocol[header.TransportProtocol]; !ok {
return nil, ErrUnsupportedAddressFamilyAndProtocol
}
// Make sure there are bytes available as specified in length
var length uint16
if err := binary.Read(io.LimitReader(reader, 2), binary.BigEndian, &length); err != nil {
return nil, ErrCantReadLength
}
if !header.validateLength(length) {
return nil, ErrInvalidLength
}
if _, err := reader.Peek(int(length)); err != nil {
return nil, ErrInvalidLength
}
// Length-limited reader for payload section
payloadReader := io.LimitReader(reader, int64(length))
// Read addresses and ports
if header.TransportProtocol.IsIPv4() {
var addr _addr4
if err := binary.Read(payloadReader, binary.BigEndian, &addr); err != nil {
return nil, ErrInvalidAddress
}
header.SourceAddress = addr.Src[:]
header.DestinationAddress = addr.Dst[:]
header.SourcePort = addr.SrcPort
header.DestinationPort = addr.DstPort
} else if header.TransportProtocol.IsIPv6() {
var addr _addr6
if err := binary.Read(payloadReader, binary.BigEndian, &addr); err != nil {
return nil, ErrInvalidAddress
}
header.SourceAddress = addr.Src[:]
header.DestinationAddress = addr.Dst[:]
header.SourcePort = addr.SrcPort
header.DestinationPort = addr.DstPort
}
// TODO fully support Unix addresses
// else if header.TransportProtocol.IsUnix() {
// var addr _addrUnix
// if err := binary.Read(payloadReader, binary.BigEndian, &addr); err != nil {
// return nil, ErrInvalidAddress
// }
//
//if header.SourceAddress, err = net.ResolveUnixAddr("unix", string(addr.Src[:])); err != nil {
// return nil, ErrCantResolveSourceUnixAddress
//}
//if header.DestinationAddress, err = net.ResolveUnixAddr("unix", string(addr.Dst[:])); err != nil {
// return nil, ErrCantResolveDestinationUnixAddress
//}
//}
// TODO add encapsulated TLV support
// Drain the remaining padding
payloadReader.Read(make([]byte, length))
return header, nil
}
func (header *Header) writeVersion2(w io.Writer) (int64, error) {
var buf bytes.Buffer
buf.Write(SIGV2)
buf.WriteByte(header.Command.toByte())
if !header.Command.IsLocal() {
buf.WriteByte(header.TransportProtocol.toByte())
// TODO add encapsulated TLV length
var addrSrc, addrDst []byte
if header.TransportProtocol.IsIPv4() {
buf.Write(lengthV4Bytes)
addrSrc = header.SourceAddress.To4()
addrDst = header.DestinationAddress.To4()
} else if header.TransportProtocol.IsIPv6() {
buf.Write(lengthV6Bytes)
addrSrc = header.SourceAddress.To16()
addrDst = header.DestinationAddress.To16()
} else if header.TransportProtocol.IsUnix() {
buf.Write(lengthUnixBytes)
// TODO is below right?
addrSrc = []byte(header.SourceAddress.String())
addrDst = []byte(header.DestinationAddress.String())
}
buf.Write(addrSrc)
buf.Write(addrDst)
portSrcBytes := func() []byte {
a := make([]byte, 2)
binary.BigEndian.PutUint16(a, header.SourcePort)
return a
}()
buf.Write(portSrcBytes)
portDstBytes := func() []byte {
a := make([]byte, 2)
binary.BigEndian.PutUint16(a, header.DestinationPort)
return a
}()
buf.Write(portDstBytes)
}
return buf.WriteTo(w)
}
func (header *Header) validateLength(length uint16) bool {
if header.TransportProtocol.IsIPv4() {
return length >= lengthV4
} else if header.TransportProtocol.IsIPv6() {
return length >= lengthV6
} else if header.TransportProtocol.IsUnix() {
return length >= lengthUnix
}
return false
}

39
vendor/github.com/pires/go-proxyproto/version_cmd.go generated vendored Normal file
View File

@ -0,0 +1,39 @@
package proxyproto
// ProtocolVersionAndCommand represents proxy protocol version and command.
type ProtocolVersionAndCommand byte
const (
LOCAL = '\x20'
PROXY = '\x21'
)
var supportedCommand = map[ProtocolVersionAndCommand]bool{
LOCAL: true,
PROXY: true,
}
// IsLocal returns true if the protocol version is \x2 and command is LOCAL, false otherwise.
func (pvc ProtocolVersionAndCommand) IsLocal() bool {
return 0x20 == pvc&0xF0 && 0x00 == pvc&0x0F
}
// IsProxy returns true if the protocol version is \x2 and command is PROXY, false otherwise.
func (pvc ProtocolVersionAndCommand) IsProxy() bool {
return 0x20 == pvc&0xF0 && 0x01 == pvc&0x0F
}
// IsUnspec returns true if the protocol version or command is unspecified, false otherwise.
func (pvc ProtocolVersionAndCommand) IsUnspec() bool {
return !(pvc.IsLocal() || pvc.IsProxy())
}
func (pvc ProtocolVersionAndCommand) toByte() byte {
if pvc.IsLocal() {
return LOCAL
} else if pvc.IsProxy() {
return PROXY
}
return LOCAL
}

2
vendor/modules.txt vendored
View File

@ -31,6 +31,8 @@ github.com/inconshreveable/mousetrap
github.com/klauspost/cpuid
# github.com/klauspost/reedsolomon v1.9.1
github.com/klauspost/reedsolomon
# github.com/pires/go-proxyproto v0.0.0-20190111085350-4d51b51e3bfc
github.com/pires/go-proxyproto
# github.com/pkg/errors v0.8.0
github.com/pkg/errors
# github.com/pmezard/go-difflib v1.0.0