从proxy获取client ip地址
This commit is contained in:
hebo
parent
8e4e9a8d62
commit
f70a646902
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@ -94,6 +94,10 @@
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"Comment": "v2.1.0-beta-226-g360ef5c",
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"Rev": "360ef5cee790475e9d75cb349e1b47b0a7a4efee"
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},
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{
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"ImportPath": "github.com/pires/go-proxyproto",
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"Rev": "83d61d90241fdbce96130ef0cc4ce5e495a95bdf"
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},
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{
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"ImportPath": "github.com/rcrowley/go-metrics",
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"Rev": "e181e095bae94582363434144c61a9653aff6e50"
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@ -1,17 +1,21 @@
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package capture
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import (
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"bufio"
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"bytes"
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"flag"
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"fmt"
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"math/rand"
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"time"
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"github.com/google/gopacket"
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"github.com/google/gopacket/layers"
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"github.com/google/gopacket/pcap"
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"github.com/zr-hebo/sniffer-agent/communicator"
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"golang.org/x/net/bpf"
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"math/rand"
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"time"
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"github.com/google/gopacket/pcapgo"
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proto "github.com/pires/go-proxyproto"
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log "github.com/sirupsen/logrus"
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"github.com/zr-hebo/sniffer-agent/model"
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sd "github.com/zr-hebo/sniffer-agent/session-dealer"
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@ -133,12 +137,24 @@ func (nc *networkCard) listenNormal() {
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m := packet.Metadata()
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m.CaptureInfo = ci
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// send FIN tcp packet to avoid not complete session cannot be released
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tcpPkt := packet.TransportLayer().(*layers.TCP)
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// send FIN tcp packet to avoid not complete session cannot be released
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// deal FIN packet
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if tcpPkt.FIN {
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nc.parseTCPPackage(packet, nil)
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continue
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}
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// deal auth packet
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if tcpPkt.FIN || sd.IsAuthPacket(tcpPkt.Payload) {
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nc.parseTCPPackage(packet)
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if sd.IsAuthPacket(tcpPkt.Payload) {
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reader := bufio.NewReader(bytes.NewReader(data))
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header, _ := proto.Read(reader)
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var clientIP *string
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if header != nil {
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clientIPContent := header.SourceAddress.String()
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clientIP = &clientIPContent
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}
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nc.parseTCPPackage(packet, clientIP)
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continue
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}
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@ -151,14 +167,14 @@ func (nc *networkCard) listenNormal() {
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}
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aliveCounter = 0
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nc.parseTCPPackage(packet)
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nc.parseTCPPackage(packet, nil)
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}
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}()
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return
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}
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func (nc *networkCard) parseTCPPackage(packet gopacket.Packet) {
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func (nc *networkCard) parseTCPPackage(packet gopacket.Packet, clientIP *string) {
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var err error
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defer func() {
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if err != nil {
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@ -183,14 +199,13 @@ func (nc *networkCard) parseTCPPackage(packet gopacket.Packet) {
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return
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}
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// get IP from ip layer
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srcIP := ipInfo.SrcIP.String()
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dstIP := ipInfo.DstIP.String()
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srcPort := int(tcpPkt.SrcPort)
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dstPort := int(tcpPkt.DstPort)
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if dstPort == nc.listenPort {
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// deal mysql server response
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err = readToServerPackage(&srcIP, srcPort, tcpPkt, nc.receiver)
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err = readToServerPackage(clientIP, &srcIP, srcPort, tcpPkt, nc.receiver)
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if err != nil {
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return
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}
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@ -240,7 +255,7 @@ func readFromServerPackage(
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}
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func readToServerPackage(
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srcIP *string, srcPort int, tcpPkt *layers.TCP, receiver chan model.QueryPiece) (err error) {
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clientIP, srcIP *string, srcPort int, tcpPkt *layers.TCP, receiver chan model.QueryPiece) (err error) {
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defer func() {
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if err != nil {
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log.Error("read package send from client to mysql server failed <-- %s", err.Error())
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@ -267,7 +282,7 @@ func readToServerPackage(
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sessionKey := spliceSessionKey(srcIP, srcPort)
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session := sessionPool[*sessionKey]
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if session == nil {
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session = sd.NewSession(sessionKey, srcIP, srcPort, localIPAddr, snifferPort, receiver)
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session = sd.NewSession(sessionKey, clientIP, srcIP, srcPort, localIPAddr, snifferPort, receiver)
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sessionPool[*sessionKey] = session
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}
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@ -5,13 +5,13 @@ import (
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"github.com/zr-hebo/sniffer-agent/session-dealer/mysql"
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)
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func NewSession(sessionKey *string, clientIP *string, clientPort int, serverIP *string, serverPort int,
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func NewSession(sessionKey, clientAlias, clientIP *string, clientPort int, serverIP *string, serverPort int,
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receiver chan model.QueryPiece) (session ConnSession) {
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switch serviceType {
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case ServiceTypeMysql:
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session = mysql.NewMysqlSession(sessionKey, clientIP, clientPort, serverIP, serverPort, receiver)
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session = mysql.NewMysqlSession(sessionKey, clientAlias, clientIP, clientPort, serverIP, serverPort, receiver)
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default:
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session = mysql.NewMysqlSession(sessionKey, clientIP, clientPort, serverIP, serverPort, receiver)
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session = mysql.NewMysqlSession(sessionKey, clientAlias, clientIP, clientPort, serverIP, serverPort, receiver)
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}
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return
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}
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@ -15,6 +15,7 @@ type MysqlSession struct {
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connectionID *string
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visitUser *string
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visitDB *string
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clientAlias *string
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clientHost *string
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clientPort int
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serverIP *string
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@ -46,10 +47,11 @@ type prepareInfo struct {
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}
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func NewMysqlSession(
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sessionKey *string, clientIP *string, clientPort int, serverIP *string, serverPort int,
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sessionKey, clientAlias, clientIP *string, clientPort int, serverIP *string, serverPort int,
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receiver chan model.QueryPiece) (ms *MysqlSession) {
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ms = &MysqlSession{
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connectionID: sessionKey,
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clientAlias: clientAlias,
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clientHost: clientIP,
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clientPort: clientPort,
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serverIP: serverIP,
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@ -333,6 +335,10 @@ func filterQueryPieceBySQL(mqp *model.PooledMysqlQueryPiece, querySQL []byte) (*
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}
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func (ms *MysqlSession) composeQueryPiece() (mqp *model.PooledMysqlQueryPiece) {
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clientIP := ms.clientAlias
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if clientIP == nil || len(*clientIP) < 1 {
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clientIP = ms.clientHost
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}
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return model.NewPooledMysqlQueryPiece(
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ms.connectionID, ms.clientHost, ms.visitUser, ms.visitDB, ms.clientHost, ms.serverIP,
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ms.clientPort, ms.serverPort, communicator.GetMysqlCapturePacketRate(), ms.stmtBeginTime)
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@ -0,0 +1,11 @@
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# Compiled Object files, Static and Dynamic libs (Shared Objects)
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*.o
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*.a
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*.so
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# Folders
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.idea
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bin
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pkg
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*.out
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@ -0,0 +1,201 @@
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Apache License
|
||||
Version 2.0, January 2004
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||||
http://www.apache.org/licenses/
|
||||
|
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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@ -0,0 +1,69 @@
|
|||
# go-proxyproto
|
||||
|
||||
[](https://github.com/pires/go-proxyproto/actions)
|
||||
[](https://coveralls.io/github/pires/go-proxyproto?branch=master)
|
||||
[](https://goreportcard.com/report/github.com/pires/go-proxyproto)
|
||||
[](http://godoc.org/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
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
"net"
|
||||
|
||||
proxyproto "github.com/pires/go-proxyproto"
|
||||
)
|
||||
|
||||
func main() {
|
||||
// Create a listener
|
||||
addr := "localhost:9876"
|
||||
list, err := net.Listen("tcp", addr)
|
||||
if err != nil {
|
||||
log.Fatalf("couldn't listen to %q: %q\n", addr, err.Error())
|
||||
}
|
||||
|
||||
// Wrap listener in a proxyproto listener
|
||||
proxyListener := &proxyproto.Listener{Listener: list}
|
||||
defer proxyListener.Close()
|
||||
|
||||
// Wait for a connection and accept it
|
||||
conn, err := proxyListener.Accept()
|
||||
defer conn.Close()
|
||||
|
||||
// Print connection details
|
||||
if conn.LocalAddr() == nil {
|
||||
log.Fatal("couldn't retrieve local address")
|
||||
}
|
||||
log.Printf("local address: %q", conn.LocalAddr().String())
|
||||
|
||||
if conn.RemoteAddr() == nil {
|
||||
log.Fatal("couldn't retrieve remote address")
|
||||
}
|
||||
log.Printf("remote address: %q", conn.RemoteAddr().String())
|
||||
}
|
||||
```
|
||||
|
|
@ -0,0 +1,71 @@
|
|||
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
|
||||
}
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
module github.com/pires/go-proxyproto
|
||||
|
||||
go 1.13
|
||||
|
|
@ -0,0 +1,149 @@
|
|||
// 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
|
||||
}
|
||||
|
||||
// RemoteAddr returns the address of the remote endpoint of the connection.
|
||||
func (header *Header) RemoteAddr() net.Addr {
|
||||
return &net.TCPAddr{
|
||||
IP: header.SourceAddress,
|
||||
Port: int(header.SourcePort),
|
||||
}
|
||||
}
|
||||
|
||||
// LocalAddr returns the address of the local endpoint of the connection.
|
||||
func (header *Header) LocalAddr() net.Addr {
|
||||
return &net.TCPAddr{
|
||||
IP: header.DestinationAddress,
|
||||
Port: int(header.DestinationPort),
|
||||
}
|
||||
}
|
||||
|
||||
// EqualTo returns true if headers are equivalent, false otherwise.
|
||||
// Deprecated: use EqualsTo instead. This method will eventually be removed.
|
||||
func (header *Header) EqualTo(otherHeader *Header) bool {
|
||||
return header.EqualsTo(otherHeader)
|
||||
}
|
||||
|
||||
// EqualsTo returns true if headers are equivalent, false otherwise.
|
||||
func (header *Header) EqualsTo(otherHeader *Header) bool {
|
||||
if otherHeader == nil {
|
||||
return false
|
||||
}
|
||||
if header.Command.IsLocal() {
|
||||
return true
|
||||
}
|
||||
return header.Version == otherHeader.Version &&
|
||||
header.TransportProtocol == otherHeader.TransportProtocol &&
|
||||
header.SourceAddress.String() == otherHeader.SourceAddress.String() &&
|
||||
header.DestinationAddress.String() == otherHeader.DestinationAddress.String() &&
|
||||
header.SourcePort == otherHeader.SourcePort &&
|
||||
header.DestinationPort == otherHeader.DestinationPort
|
||||
}
|
||||
|
||||
// WriteTo renders a proxy protocol header in a format and writes it to an io.Writer.
|
||||
func (header *Header) WriteTo(w io.Writer) (int64, error) {
|
||||
buf, err := header.Format()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
return bytes.NewBuffer(buf).WriteTo(w)
|
||||
}
|
||||
|
||||
// Format renders a proxy protocol header in a format to write over the wire.
|
||||
func (header *Header) Format() ([]byte, error) {
|
||||
switch header.Version {
|
||||
case 1:
|
||||
return header.formatVersion1()
|
||||
case 2:
|
||||
return header.formatVersion2()
|
||||
default:
|
||||
return nil, 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
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,130 @@
|
|||
package proxyproto
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"net"
|
||||
"sync"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Listener is used to wrap an underlying listener,
|
||||
// whose connections may be using the HAProxy Proxy Protocol.
|
||||
// If the connection is using the protocol, the RemoteAddr() will return
|
||||
// the correct client address.
|
||||
type Listener struct {
|
||||
Listener net.Listener
|
||||
}
|
||||
|
||||
// Conn is used to wrap and underlying connection which
|
||||
// may be speaking the Proxy Protocol. If it is, the RemoteAddr() will
|
||||
// return the address of the client instead of the proxy address.
|
||||
type Conn struct {
|
||||
bufReader *bufio.Reader
|
||||
conn net.Conn
|
||||
header *Header
|
||||
once sync.Once
|
||||
}
|
||||
|
||||
// Accept waits for and returns the next connection to the listener.
|
||||
func (p *Listener) Accept() (net.Conn, error) {
|
||||
// Get the underlying connection
|
||||
conn, err := p.Listener.Accept()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return NewConn(conn), nil
|
||||
}
|
||||
|
||||
// Close closes the underlying listener.
|
||||
func (p *Listener) Close() error {
|
||||
return p.Listener.Close()
|
||||
}
|
||||
|
||||
// Addr returns the underlying listener's network address.
|
||||
func (p *Listener) Addr() net.Addr {
|
||||
return p.Listener.Addr()
|
||||
}
|
||||
|
||||
// NewConn is used to wrap a net.Conn that may be speaking
|
||||
// the proxy protocol into a proxyproto.Conn
|
||||
func NewConn(conn net.Conn) *Conn {
|
||||
pConn := &Conn{
|
||||
bufReader: bufio.NewReader(conn),
|
||||
conn: conn,
|
||||
}
|
||||
return pConn
|
||||
}
|
||||
|
||||
// Read is check for the proxy protocol header when doing
|
||||
// the initial scan. If there is an error parsing the header,
|
||||
// it is returned and the socket is closed.
|
||||
func (p *Conn) Read(b []byte) (int, error) {
|
||||
var err error
|
||||
p.once.Do(func() {
|
||||
err = p.readHeader()
|
||||
})
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
return p.bufReader.Read(b)
|
||||
}
|
||||
|
||||
// Write wraps original conn.Write
|
||||
func (p *Conn) Write(b []byte) (int, error) {
|
||||
return p.conn.Write(b)
|
||||
}
|
||||
|
||||
// Close wraps original conn.Close
|
||||
func (p *Conn) Close() error {
|
||||
return p.conn.Close()
|
||||
}
|
||||
|
||||
// LocalAddr returns the address of the server if the proxy
|
||||
// protocol is being used, otherwise just returns the address of
|
||||
// the socket server.
|
||||
func (p *Conn) LocalAddr() net.Addr {
|
||||
p.once.Do(func() { p.readHeader() })
|
||||
if p.header == nil || p.header.Command.IsLocal() {
|
||||
return p.conn.LocalAddr()
|
||||
}
|
||||
|
||||
return p.header.LocalAddr()
|
||||
}
|
||||
|
||||
// RemoteAddr returns the address of the client if the proxy
|
||||
// protocol is being used, otherwise just returns the address of
|
||||
// the socket peer.
|
||||
func (p *Conn) RemoteAddr() net.Addr {
|
||||
p.once.Do(func() { p.readHeader() })
|
||||
if p.header == nil || p.header.Command.IsLocal() {
|
||||
return p.conn.RemoteAddr()
|
||||
}
|
||||
|
||||
return p.header.RemoteAddr()
|
||||
}
|
||||
|
||||
// SetDeadline wraps original conn.SetDeadline
|
||||
func (p *Conn) SetDeadline(t time.Time) error {
|
||||
return p.conn.SetDeadline(t)
|
||||
}
|
||||
|
||||
// SetReadDeadline wraps original conn.SetReadDeadline
|
||||
func (p *Conn) SetReadDeadline(t time.Time) error {
|
||||
return p.conn.SetReadDeadline(t)
|
||||
}
|
||||
|
||||
// SetWriteDeadline wraps original conn.SetWriteDeadline
|
||||
func (p *Conn) SetWriteDeadline(t time.Time) error {
|
||||
return p.conn.SetWriteDeadline(t)
|
||||
}
|
||||
|
||||
func (p *Conn) readHeader() (err error) {
|
||||
p.header, err = Read(p.bufReader)
|
||||
// For the purpose of this wrapper shamefully stolen from armon/go-proxyproto
|
||||
// let's act as if there was no error when PROXY protocol is not present.
|
||||
if err == ErrNoProxyProtocol {
|
||||
err = nil
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
|
@ -0,0 +1,116 @@
|
|||
package proxyproto
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"bytes"
|
||||
"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) formatVersion1() ([]byte, 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.Bytes(), nil
|
||||
}
|
||||
|
||||
func parseV1PortNumber(portStr string) (port uint16, err error) {
|
||||
_port, _err := strconv.Atoi(portStr)
|
||||
if _err == nil {
|
||||
if _port < 0 || _port > 65535 {
|
||||
err = ErrInvalidPortNumber
|
||||
} else {
|
||||
port = uint16(_port)
|
||||
}
|
||||
} else {
|
||||
err = ErrInvalidPortNumber
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
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
|
||||
}
|
||||
|
|
@ -0,0 +1,195 @@
|
|||
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
|
||||
}
|
||||
|
||||
// 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) formatVersion2() ([]byte, error) {
|
||||
var buf bytes.Buffer
|
||||
buf.Write(SIGV2)
|
||||
buf.WriteByte(header.Command.toByte())
|
||||
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.Bytes(), nil
|
||||
}
|
||||
|
||||
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
|
||||
}
|
||||
|
|
@ -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
|
||||
}
|
||||
Loading…
Reference in New Issue