/
main.go
164 lines (152 loc) · 3.38 KB
/
main.go
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package main
import (
"bufio"
"fmt"
"log"
"net"
"os"
"github.com/L7-MCPE/lav7"
"github.com/L7-MCPE/lav7/raknet"
"github.com/L7-MCPE/lav7/util/buffer"
"github.com/davecgh/go-spew/spew"
)
var conn net.Conn
var lastSeq uint32
var ocr1, ocr2, handshake []byte
var target *net.UDPAddr
func main() {
if len(os.Args) < 2 {
fmt.Printf("Usage: %s <target address:port>", os.Args[0])
os.Exit(0)
}
var err error
conn, err = net.Dial("udp", os.Args[1])
if err != nil {
log.Fatal(err)
}
target, _ = net.ResolveUDPAddr("udp", os.Args[1])
boilup()
auth()
<-make(chan bool)
}
func boilup() {
raknet.InitProtocol()
ocr1 = raknet.GetHandler(0x05).Write(raknet.Fields{
"protocol": uint8(raknet.RaknetProtocol),
"mtuSize": 1464,
}).Done()
ocr2 = raknet.GetHandler(0x07).Write(raknet.Fields{
"serverAddress": func() *net.UDPAddr {
n, _ := net.ResolveUDPAddr("udp", os.Args[1])
return n
}(),
"mtuSize": uint16(1464),
"clientID": uint64(483287947),
}).Done()
dp := &raknet.DataPacket{
Head: 0x80,
SeqNumber: 0,
Packets: []*raknet.EncapsulatedPacket{
&raknet.EncapsulatedPacket{
Buffer: raknet.GetDataHandler(0x13).Write(raknet.Fields{
"address": new(net.UDPAddr),
"systemAddresses": func() []*net.UDPAddr {
r := make([]*net.UDPAddr, 10)
for i := 0; i < 10; i++ {
r[i] = new(net.UDPAddr)
}
return r
}(),
"sendPing": uint64(324324),
"sendPong": uint64(324325),
}),
},
},
}
dp.Encode()
handshake = dp.Done()
}
func auth() {
go func() {
for {
recvBuffer := make([]byte, 1024*4)
if _, err := bufio.NewReader(conn).Read(recvBuffer); err != nil {
panic(err)
}
spew.Dump(recvBuffer)
if len(recvBuffer) >= 8 &&
recvBuffer[0] >= 0x80 && recvBuffer[0] < 0x90 &&
recvBuffer[4] == 0x00 && recvBuffer[7] == 0x15 {
fmt.Println("Session is closed!")
os.Exit(0)
} else if recvBuffer[0] >= 0x80 && recvBuffer[0] < 0x90 {
dp := &raknet.DataPacket{
Buffer: buffer.FromBytes(recvBuffer),
}
dp.Decode()
for _, ep := range dp.Packets {
if ep.Buffer.Payload[0] == 0x91 {
fmt.Println("Session is closed!")
os.Exit(0)
return
}
}
}
}
}()
send(ocr1)
send(ocr2)
send(handshake)
lastSeq++
sendCompressed(&lav7.Login{
Username: "Helloworld",
Proto1: lav7.MinecraftProtocol,
Proto2: lav7.MinecraftProtocol,
ClientID: 0,
SkinName: "WhoKnows",
Skin: make([]byte, 32*64*4),
})
lastSeq++
}
func sendFromFields(pid byte, field raknet.Fields) {
send(append([]byte{pid}, raknet.GetHandler(pid).Write(field).Done()[1:]...))
return
}
func sendDataPacket(pid byte, field raknet.Fields) {
dp := &raknet.DataPacket{
Head: 0x80,
SeqNumber: lastSeq,
Packets: []*raknet.EncapsulatedPacket{
&raknet.EncapsulatedPacket{
Buffer: raknet.GetDataHandler(pid).Write(field),
},
},
}
dp.Encode()
send(dp.Done())
lastSeq++
}
func sendPacket(pk lav7.Packet) {
sendFromFields(0x80, raknet.Fields{
"seqNumber": lastSeq,
"packets": []*raknet.EncapsulatedPacket{
raknet.NewEncapsulated(
func() *buffer.Buffer {
buf := buffer.FromBytes([]byte{pk.Pid()})
buf.Append(pk.Write())
return buf
}(),
),
},
})
lastSeq++
}
func sendCompressed(pk lav7.Packet) {
b := append([]byte{pk.Pid()}, pk.Write().Done()...)
sendPacket(&lav7.Batch{
Payloads: [][]byte{b},
})
}
func send(b []byte) {
conn.Write(b)
}