2020-10-16 17:13:46 +02:00
|
|
|
package main
|
|
|
|
|
|
|
|
|
|
import (
|
|
|
|
|
"bytes"
|
2020-10-16 18:22:22 +02:00
|
|
|
"crypto/rand"
|
2020-10-16 17:13:46 +02:00
|
|
|
"encoding/binary"
|
|
|
|
|
"fmt"
|
|
|
|
|
"net"
|
|
|
|
|
"time"
|
|
|
|
|
|
|
|
|
|
"github.com/nonoo/kappanhang/log"
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
var conn *net.UDPConn
|
|
|
|
|
|
|
|
|
|
func send(d []byte) {
|
|
|
|
|
_, err := conn.Write(d)
|
|
|
|
|
if err != nil {
|
|
|
|
|
log.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func read() ([]byte, error) {
|
|
|
|
|
err := conn.SetReadDeadline(time.Now().Add(time.Second))
|
|
|
|
|
if err != nil {
|
|
|
|
|
log.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
b := make([]byte, 1500)
|
|
|
|
|
n, _, err := conn.ReadFromUDP(b)
|
|
|
|
|
if err != nil {
|
|
|
|
|
if err, ok := err.(net.Error); ok && !err.Timeout() {
|
|
|
|
|
log.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return b[:n], err
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func main() {
|
|
|
|
|
log.Init()
|
|
|
|
|
parseArgs()
|
|
|
|
|
|
|
|
|
|
hostPort := fmt.Sprint(connectAddress, ":", connectPort)
|
|
|
|
|
log.Print("connecting to ", hostPort)
|
|
|
|
|
raddr, err := net.ResolveUDPAddr("udp", hostPort)
|
|
|
|
|
if err != nil {
|
|
|
|
|
log.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
conn, err = net.DialUDP("udp", nil, raddr)
|
|
|
|
|
if err != nil {
|
|
|
|
|
log.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Constructing the local session ID by combining the local IP address and port.
|
|
|
|
|
laddr := conn.LocalAddr().(*net.UDPAddr)
|
|
|
|
|
localSID := binary.BigEndian.Uint32(laddr.IP[len(laddr.IP)-4:])<<16 | uint32(laddr.Port&0xffff)
|
|
|
|
|
log.Debugf("using session id %.8x", localSID)
|
|
|
|
|
|
|
|
|
|
send([]byte{0x10, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x00, 0x00, 0x00, 0x00})
|
|
|
|
|
// send([]byte{0x15, 0x00, 0x00, 0x00, 0x07, 0x00, 0x01, 0x00, byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x3e, 0x10, 0x00})
|
|
|
|
|
// send([]byte{0x10, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x00, 0x00, 0x00, 0x00})
|
|
|
|
|
// send([]byte{0x15, 0x00, 0x00, 0x00, 0x07, 0x00, 0x02, 0x00, byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x00, 0x00, 0x00, 0x00, 0x00, 0x70, 0x3e, 0x10, 0x00})
|
|
|
|
|
// send([]byte{0x10, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x00, 0x00, 0x00, 0x00})
|
|
|
|
|
|
|
|
|
|
var remoteSID uint32
|
|
|
|
|
for {
|
|
|
|
|
r, _ := read()
|
|
|
|
|
if bytes.Equal(r[:8], []byte{0x10, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00}) {
|
|
|
|
|
remoteSID = binary.BigEndian.Uint32(r[8:12])
|
|
|
|
|
break
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
log.Debugf("got remote session id %.8x", remoteSID)
|
|
|
|
|
|
|
|
|
|
send([]byte{0x10, 0x00, 0x00, 0x00, 0x06, 0x00, 0x01, 0x00, byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID)})
|
|
|
|
|
send([]byte{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID),
|
|
|
|
|
0x00, 0x00, 0x00, 0x70, 0x01, 0x00, 0x00, 0x22,
|
|
|
|
|
0x00, 0x00, 0x09, 0x27, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
2020-10-16 17:43:30 +02:00
|
|
|
0x2b, 0x3f, 0x55, 0x5c, 0x00, 0x00, 0x00, 0x00, // username: beer
|
2020-10-16 17:13:46 +02:00
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
2020-10-16 17:43:30 +02:00
|
|
|
0x2b, 0x3f, 0x55, 0x5c, 0x3f, 0x25, 0x77, 0x58, // pass: beerbeer
|
2020-10-16 17:13:46 +02:00
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x69, 0x63, 0x6f, 0x6d, 0x2d, 0x70, 0x63, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
|
|
|
|
|
|
|
|
|
|
var sendSeq uint8
|
|
|
|
|
var lastReceivedSeq uint8
|
|
|
|
|
var receivedSeq bool
|
|
|
|
|
var lastPingAt time.Time
|
2020-10-16 18:51:22 +02:00
|
|
|
var lastLongPingAt time.Time
|
2020-10-16 17:13:46 +02:00
|
|
|
var errCount int
|
2020-10-16 18:22:22 +02:00
|
|
|
var randID [4]byte
|
2020-10-16 18:51:22 +02:00
|
|
|
var authID [6]byte
|
2020-10-16 17:13:46 +02:00
|
|
|
for {
|
|
|
|
|
r, err := read()
|
|
|
|
|
if err != nil {
|
|
|
|
|
errCount++
|
|
|
|
|
if errCount > 5 {
|
|
|
|
|
log.Fatal("timeout")
|
|
|
|
|
}
|
|
|
|
|
log.Error("stream break detected")
|
|
|
|
|
}
|
|
|
|
|
errCount = 0
|
|
|
|
|
|
2020-10-16 18:51:22 +02:00
|
|
|
// Example success auth packet: 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
|
|
|
|
|
// 0xe6, 0xb2, 0x7b, 0x7b, 0xbb, 0x41, 0x3f, 0x2b,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x50, 0x02, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x5d, 0x37, 0x12, 0x82, 0x3b, 0xde,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x46, 0x54, 0x54, 0x48, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
2020-10-16 17:43:30 +02:00
|
|
|
if len(r) == 96 && bytes.Equal(r[:8], []byte{0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00}) {
|
|
|
|
|
if bytes.Equal(r[48:52], []byte{0xff, 0xff, 0xff, 0xfe}) {
|
|
|
|
|
log.Fatal("invalid user/password")
|
|
|
|
|
} else {
|
2020-10-16 18:51:22 +02:00
|
|
|
copy(authID[:], r[26:32])
|
2020-10-16 17:43:30 +02:00
|
|
|
log.Print("auth ok")
|
|
|
|
|
}
|
|
|
|
|
}
|
2020-10-16 18:22:22 +02:00
|
|
|
if len(r) == 21 && bytes.Equal(r[1:6], []byte{0x00, 0x00, 0x00, 0x07, 0x00}) {
|
2020-10-16 17:13:46 +02:00
|
|
|
gotSeq := r[6]
|
|
|
|
|
if receivedSeq && lastReceivedSeq+1 != gotSeq {
|
|
|
|
|
log.Error("packet loss detected")
|
|
|
|
|
}
|
|
|
|
|
lastReceivedSeq = gotSeq
|
|
|
|
|
receivedSeq = true
|
|
|
|
|
|
2020-10-16 18:22:22 +02:00
|
|
|
// Replying to the radio.
|
|
|
|
|
// Example request from radio: 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x1c, 0x0e, 0xe4, 0x35, 0xdd, 0x72, 0xbe, 0xd9, 0xf2, 0x63, 0x00, 0x57, 0x2b, 0x12, 0x00
|
|
|
|
|
// Example answer from PC: 0x15, 0x00, 0x00, 0x00, 0x07, 0x00, 0x1c, 0x0e, 0xbe, 0xd9, 0xf2, 0x63, 0xe4, 0x35, 0xdd, 0x72, 0x01, 0x57, 0x2b, 0x12, 0x00
|
|
|
|
|
send([]byte{0x15, 0x00, 0x00, 0x00, 0x07, 0x00, gotSeq, r[7], byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x01,
|
|
|
|
|
r[17], r[18], r[19], r[20]})
|
|
|
|
|
}
|
|
|
|
|
if len(r) == 16 && bytes.Equal(r[:6], []byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00}) {
|
|
|
|
|
// Replying to the radio.
|
2020-10-16 18:51:22 +02:00
|
|
|
// Example request from radio: 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0xe4, 0x35, 0xdd, 0x72, 0xbe, 0xd9, 0xf2, 0x63
|
|
|
|
|
// Example answer from PC: 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x00, 0xbe, 0xd9, 0xf2, 0x63, 0xe4, 0x35, 0xdd, 0x72
|
2020-10-16 18:22:22 +02:00
|
|
|
gotSeq := r[6]
|
2020-10-16 18:51:22 +02:00
|
|
|
send([]byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00, gotSeq, r[7], byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID)})
|
2020-10-16 18:22:22 +02:00
|
|
|
}
|
2020-10-16 17:13:46 +02:00
|
|
|
|
2020-10-16 18:22:22 +02:00
|
|
|
if time.Since(lastPingAt) >= 100*time.Millisecond {
|
|
|
|
|
// Example request from PC: 0x15, 0x00, 0x00, 0x00, 0x07, 0x00, 0x09, 0x00, 0xbe, 0xd9, 0xf2, 0x63, 0xe4, 0x35, 0xdd, 0x72, 0x00, 0x78, 0x40, 0xf6, 0x02
|
|
|
|
|
// Example reply from radio: 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x09, 0x00, 0xe4, 0x35, 0xdd, 0x72, 0xbe, 0xd9, 0xf2, 0x63, 0x01, 0x78, 0x40, 0xf6, 0x02
|
|
|
|
|
_, err = rand.Read(randID[:])
|
|
|
|
|
if err != nil {
|
|
|
|
|
log.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
send([]byte{0x15, 0x00, 0x00, 0x00, 0x07, 0x00, sendSeq, 0x00, byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID), 0x01,
|
|
|
|
|
randID[0], randID[1], randID[2], randID[3]})
|
2020-10-16 18:51:22 +02:00
|
|
|
send([]byte{0x10, 0x00, 0x00, 0x00, 0x03, 0x00, sendSeq, 0x00, byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID)})
|
2020-10-16 17:13:46 +02:00
|
|
|
sendSeq++
|
|
|
|
|
lastPingAt = time.Now()
|
2020-10-16 18:51:22 +02:00
|
|
|
|
|
|
|
|
if time.Since(lastLongPingAt) >= 60*time.Second {
|
|
|
|
|
// Example request from PC: 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0d, 0x00,
|
|
|
|
|
// 0xbb, 0x41, 0x3f, 0x2b, 0xe6, 0xb2, 0x7b, 0x7b,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x30, 0x01, 0x05, 0x00, 0x02,
|
|
|
|
|
// 0x00, 0x00, 0x5d, 0x37, 0x12, 0x82, 0x3b, 0xde,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
|
|
|
|
// Example reply from radio: 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00,
|
|
|
|
|
// 0xe6, 0xb2, 0x7b, 0x7b, 0xbb, 0x41, 0x3f, 0x2b,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x30, 0x02, 0x05, 0x00, 0x02,
|
|
|
|
|
// 0x00, 0x00, 0x5d, 0x37, 0x12, 0x82, 0x3b, 0xde,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
|
|
|
|
send([]byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00, sendSeq, 0x00, byte(remoteSID >> 24), byte(remoteSID >> 16), byte(remoteSID >> 8), byte(remoteSID), byte(localSID >> 24), byte(localSID >> 16), byte(localSID >> 8), byte(localSID),
|
|
|
|
|
0x00, 0x00, 0x00, 0x30, 0x01, 0x05, 0x00, 0x3f,
|
|
|
|
|
0x00, 0x00, authID[0], authID[1], authID[2], authID[3], authID[4], authID[5],
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
|
|
|
|
|
sendSeq++
|
|
|
|
|
lastLongPingAt = time.Now()
|
|
|
|
|
}
|
2020-10-16 17:13:46 +02:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
