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kappanhang/controlstream.go
Nonoo dec1be0c41 Move pkt7 handling to a separate file
2020-10-18 14:21:58 +02:00

260 lines
12 KiB
Go
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package main
import (
"bytes"
"crypto/rand"
"encoding/binary"
"errors"
"time"
"github.com/nonoo/kappanhang/log"
)
type controlStream struct {
common streamCommon
authSendSeq uint16
authInnerSendSeq uint16
authID [6]byte
serialAndAudioStreamOpened bool
requestSerialAndAudioTimeout *time.Timer
}
func (s *controlStream) sendPktAuth() {
// The reply to the auth packet will contain a 6 bytes long auth ID with the first 2 bytes set to our randID.
var randID [2]byte
_, err := rand.Read(randID[:])
if err != nil {
log.Fatal(err)
}
s.common.send([]byte{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, byte(s.authSendSeq), byte(s.authSendSeq >> 8),
byte(s.common.localSID >> 24), byte(s.common.localSID >> 16), byte(s.common.localSID >> 8), byte(s.common.localSID),
byte(s.common.remoteSID >> 24), byte(s.common.remoteSID >> 16), byte(s.common.remoteSID >> 8), byte(s.common.remoteSID),
0x00, 0x00, 0x00, 0x70, 0x01, 0x00, 0x00, byte(s.authInnerSendSeq),
byte(s.authInnerSendSeq >> 8), 0x00, randID[0], randID[1], 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,
0x2b, 0x3f, 0x55, 0x5c, 0x00, 0x00, 0x00, 0x00, // username: beer
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2b, 0x3f, 0x55, 0x5c, 0x3f, 0x25, 0x77, 0x58, // pass: beerbeer
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x69, 0x63, 0x6f, 0x6d, 0x2d, 0x70, 0x63, 0x00, // icom-pc in plain text
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
s.authSendSeq++
s.authInnerSendSeq++
}
func (s *controlStream) sendPktReauth(firstReauthSend bool) {
var magic byte
if firstReauthSend {
magic = 0x02
} else {
magic = 0x05
}
// 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
s.common.send([]byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00, byte(s.authSendSeq), byte(s.authSendSeq >> 8),
byte(s.common.localSID >> 24), byte(s.common.localSID >> 16), byte(s.common.localSID >> 8), byte(s.common.localSID),
byte(s.common.remoteSID >> 24), byte(s.common.remoteSID >> 16), byte(s.common.remoteSID >> 8), byte(s.common.remoteSID),
0x00, 0x00, 0x00, 0x30, 0x01, magic, 0x00, byte(s.authInnerSendSeq),
byte(s.authInnerSendSeq >> 8), 0x00, s.authID[0], s.authID[1], s.authID[2], s.authID[3], s.authID[4], s.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})
s.authSendSeq++
s.authInnerSendSeq++
}
func (s *controlStream) sendDisconnect() {
s.common.send([]byte{0x40, 0x00, 0x00, 0x00, 0x00, 0x00, byte(s.authSendSeq), byte(s.authSendSeq >> 8),
byte(s.common.localSID >> 24), byte(s.common.localSID >> 16), byte(s.common.localSID >> 8), byte(s.common.localSID),
byte(s.common.remoteSID >> 24), byte(s.common.remoteSID >> 16), byte(s.common.remoteSID >> 8), byte(s.common.remoteSID),
0x00, 0x00, 0x00, 0x30, 0x01, 0x01, 0x00, byte(s.authInnerSendSeq),
byte(s.authInnerSendSeq >> 8), 0x00, s.authID[0], s.authID[1], s.authID[2], s.authID[3], s.authID[4], s.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})
s.common.sendDisconnect()
}
func (s *controlStream) sendPkt0() {
s.common.send([]byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00, byte(s.authSendSeq), byte(s.authSendSeq >> 8),
byte(s.common.localSID >> 24), byte(s.common.localSID >> 16), byte(s.common.localSID >> 8), byte(s.common.localSID),
byte(s.common.remoteSID >> 24), byte(s.common.remoteSID >> 16), byte(s.common.remoteSID >> 8), byte(s.common.remoteSID)})
s.authSendSeq++
}
func (s *controlStream) sendRequestSerialAndAudio() {
log.Print("requesting serial and audio stream")
s.common.send([]byte{0x90, 0x00, 0x00, 0x00, 0x00, 0x00, byte(s.authSendSeq), byte(s.authSendSeq >> 8),
byte(s.common.localSID >> 24), byte(s.common.localSID >> 16), byte(s.common.localSID >> 8), byte(s.common.localSID),
byte(s.common.remoteSID >> 24), byte(s.common.remoteSID >> 16), byte(s.common.remoteSID >> 8), byte(s.common.remoteSID),
0x00, 0x00, 0x00, 0x80, 0x01, 0x03, 0x00, byte(s.authInnerSendSeq),
byte(s.authInnerSendSeq >> 8), 0x00, s.authID[0], s.authID[1], s.authID[2], s.authID[3], s.authID[4], s.authID[5],
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
0x80, 0x00, 0x00, 0x90, 0xc7, 0x0e, 0x86, 0x01, // The last 5 bytes from this row can be acquired from a reply starting with 0xa8 or 0x90
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x49, 0x43, 0x2d, 0x37, 0x30, 0x35, 0x00, 0x00, // IC-705 in plain text
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2b, 0x3f, 0x55, 0x5c, 0x00, 0x00, 0x00, 0x00, // username: beer
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x01, 0x04, 0x04, 0x00, 0x00, 0xbb, 0x80,
0x00, 0x00, 0xbb, 0x80, 0x00, 0x00, 0xc3, 0x52,
0x00, 0x00, 0xc3, 0x53, 0x00, 0x00, 0x00, 0x64,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
s.authSendSeq++
s.authInnerSendSeq++
s.requestSerialAndAudioTimeout = time.AfterFunc(3*time.Second, func() {
exit(errors.New("serial and audio request timeout"))
})
}
func (s *controlStream) handleRead(r []byte) {
switch len(r) {
case 16:
if bytes.Equal(r[:6], []byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00}) {
// Replying to the radio.
// 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
gotSeq := binary.LittleEndian.Uint16(r[6:8])
s.common.send([]byte{0x10, 0x00, 0x00, 0x00, 0x00, 0x00, byte(gotSeq), byte(gotSeq >> 8),
byte(s.common.localSID >> 24), byte(s.common.localSID >> 16), byte(s.common.localSID >> 8), byte(s.common.localSID),
byte(s.common.remoteSID >> 24), byte(s.common.remoteSID >> 16), byte(s.common.remoteSID >> 8), byte(s.common.remoteSID)})
}
case 80:
if bytes.Equal(r[:6], []byte{0x50, 0x00, 0x00, 0x00, 0x00, 0x00}) && bytes.Equal(r[48:51], []byte{0xff, 0xff, 0xff}) {
// Example answer from radio: 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00,
// 0x86, 0x1f, 0x2f, 0xcc, 0x03, 0x03, 0x89, 0x29,
// 0x00, 0x00, 0x00, 0x40, 0x02, 0x03, 0x00, 0x52,
// 0x00, 0x00, 0xf8, 0xad, 0x06, 0x8d, 0xda, 0x7b,
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
// 0x80, 0x00, 0x00, 0x90, 0xc7, 0x0e, 0x86, 0x01,
// 0xff, 0xff, 0xff, 0xff, 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
exit(errors.New("reauth failed, try again after about 1 minute"))
}
case 144:
if !s.serialAndAudioStreamOpened && bytes.Equal(r[:6], []byte{0x90, 0x00, 0x00, 0x00, 0x00, 0x00}) && r[96] == 1 {
// Example answer:
// 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x19, 0x00,
// 0xc6, 0x5f, 0x6f, 0x0c, 0x5f, 0x8b, 0x1e, 0x89,
// 0x00, 0x00, 0x00, 0x80, 0x03, 0x00, 0x00, 0x00,
// 0x00, 0x00, 0x31, 0x30, 0x31, 0x47, 0x39, 0x07,
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
// 0x80, 0x00, 0x00, 0x90, 0xc7, 0x0e, 0x86, 0x01,
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// 0x49, 0x43, 0x2d, 0x37, 0x30, 0x35, 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,
// 0x01, 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, 0xc0, 0xa8, 0x03, 0x03,
// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
log.Print("serial and audio request success")
if s.requestSerialAndAudioTimeout != nil {
s.requestSerialAndAudioTimeout.Stop()
s.requestSerialAndAudioTimeout = nil
}
go streams.audio.start()
s.serialAndAudioStreamOpened = true
}
}
}
func (s *controlStream) start() {
s.common.open("control", 50001)
s.common.sendPkt3()
s.common.pkt7.sendSeq = 1
s.common.pkt7.send(&s.common)
s.common.sendPkt3()
s.common.waitForPkt4Answer()
s.common.sendPkt6()
s.common.waitForPkt6Answer()
s.authSendSeq = 1
s.authInnerSendSeq = 0x1234
s.sendPktAuth()
log.Debug("expecting auth answer")
// 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
r := s.common.expect(96, []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")
}
copy(s.authID[:], r[26:32])
log.Print("auth ok")
s.sendPktReauth(true)
s.sendPkt0()
s.sendRequestSerialAndAudio()
s.common.pkt7.sendSeq = 5
s.common.pkt7.startPeriodicSend(&s.common)
pkt0SendTicker := time.NewTicker(100 * time.Millisecond)
reauthTicker := time.NewTicker(60 * time.Second)
statusLogTicker := time.NewTicker(3 * time.Second)
for {
select {
case r = <-s.common.readChan:
s.handleRead(r)
case <-pkt0SendTicker.C:
s.sendPkt0()
case <-reauthTicker.C:
s.sendPktReauth(false)
case <-statusLogTicker.C:
log.Print("roundtrip latency ", s.common.pkt7.latency)
}
}
}
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