1 // VoRS -- Vo(IP) Really Simple
2 // Copyright (C) 2024 Sergey Matveev <stargrave@stargrave.org>
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU Affero General Public License as
6 // published by the Free Software Foundation, version 3 of the License.
8 // This program is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 // GNU General Public License for more details.
13 // You should have received a copy of the GNU General Public License
14 // along with this program. If not, see <http://www.gnu.org/licenses/>.
33 "github.com/flynn/noise"
34 "github.com/jroimartin/gocui"
35 vors "go.stargrave.org/vors/internal"
36 "golang.org/x/crypto/blake2s"
37 "golang.org/x/crypto/chacha20"
38 "golang.org/x/crypto/poly1305"
39 "gopkg.in/hraban/opus.v2"
50 Streams = map[byte]*Stream{}
51 Finish = make(chan struct{})
52 OurStats = &Stats{dead: make(chan struct{})}
53 Name = flag.String("name", "test", "Username")
57 func parseSID(s string) byte {
58 n, err := strconv.Atoi(s)
63 log.Fatal("too big stream num")
68 func makeCmd(cmd string) *exec.Cmd {
69 args := strings.Fields(cmd)
71 return exec.Command(args[0])
73 return exec.Command(args[0], args[1:]...)
76 func incr(data []byte) {
77 for i := len(data) - 1; i >= 0; i-- {
86 const soxParams = "--no-show-progress --buffer 1920 --channels 1 --endian little --encoding signed --rate 48000 --bits 16 --type raw -"
89 srvAddr := flag.String("srv", "vors.home.arpa:"+strconv.Itoa(vors.DefaultPort),
90 "Host:TCP/UDP port to connect to")
91 srvPubHex := flag.String("pub", "", "Server's public key, hex")
92 recCmd := flag.String("rec", "rec "+soxParams, "rec command")
93 playCmd := flag.String("play", "play "+soxParams, "play command")
94 vadRaw := flag.Uint("vad", 0, "VAD threshold")
96 log.SetFlags(log.Lmicroseconds | log.Lshortfile)
98 srvPub, err := hex.DecodeString(*srvPubHex)
103 vad := uint64(*vadRaw)
104 opusEnc := newOpusEnc()
105 var mic io.ReadCloser
107 cmd := makeCmd(*recCmd)
108 mic, err = cmd.StdoutPipe()
118 ctrl, err := net.DialTCP("tcp", nil, vors.MustResolveTCP(*srvAddr))
120 log.Fatalln("dial server:", err)
123 if err = ctrl.SetNoDelay(true); err != nil {
124 log.Fatalln("nodelay:", err)
126 if _, err = io.Copy(ctrl, strings.NewReader(vors.NoisePrologue)); err != nil {
127 log.Fatalln("handshake: write prologue", err)
131 hs, err := noise.NewHandshakeState(noise.Config{
132 CipherSuite: vors.NoiseCipherSuite,
133 Pattern: noise.HandshakeNK,
136 Prologue: []byte(vors.NoisePrologue),
139 log.Fatalln("noise.NewHandshakeState:", err)
141 buf, _, _, err := hs.WriteMessage(nil, []byte(*Name))
143 log.Fatalln("handshake encrypt:", err)
145 if err = vors.PktWrite(ctrl, buf); err != nil {
146 log.Fatalln("write handshake:", err)
149 buf, err = vors.PktRead(ctrl)
151 log.Fatalln("read handshake:", err)
153 buf, txCS, rxCS, err := hs.ReadMessage(nil, buf)
155 log.Fatalln("handshake decrypt:", err)
158 rx := make(chan []byte)
161 buf, err := vors.PktRead(ctrl)
163 log.Fatalln("rx", err)
165 buf, err = rxCS.Decrypt(buf[:0], nil, buf)
167 log.Fatalln("rx decrypt", err)
173 srvAddrUDP := vors.MustResolveUDP(*srvAddr)
174 conn, err := net.DialUDP("udp", nil, srvAddrUDP)
176 log.Fatalln("connect:", err)
180 cols := strings.Fields(string(buf))
181 if cols[0] != "OK" || len(cols) != 2 {
182 log.Fatalln("handshake failed:", cols)
184 var cookie vors.Cookie
185 cookieRaw, err := hex.DecodeString(cols[1])
189 copy(cookie[:], cookieRaw)
190 timeout := time.NewTimer(vors.PingTime)
196 ticker := time.NewTicker(time.Second)
197 if _, err = conn.Write(cookie[:]); err != nil {
198 log.Fatalln("write:", err)
200 WaitForCookieAcceptance:
204 log.Fatalln("cookie acceptance timeout")
206 if _, err = conn.Write(cookie[:]); err != nil {
207 log.Fatalln("write:", err)
210 cols = strings.Fields(string(buf))
211 if cols[0] != "SID" || len(cols) != 2 {
212 log.Fatalln("cookie acceptance failed:", string(buf))
214 sid = parseSID(cols[1])
215 Streams[sid] = &Stream{name: *Name, stats: OurStats}
216 break WaitForCookieAcceptance
226 h, err := blake2s.New256(hs.ChannelBinding())
230 h.Write([]byte(vors.NoisePrologue))
236 LoggerReady := make(chan struct{})
237 GUI, err = gocui.NewGui(gocui.OutputNormal)
242 GUI.SelFgColor = gocui.ColorCyan
244 GUI.SetManagerFunc(guiLayout)
245 if err := GUI.SetKeybinding("", gocui.KeyF10, gocui.ModNone, guiQuit); err != nil {
248 if err := GUI.SetKeybinding("", gocui.KeyEnter, gocui.ModNone, mute); err != nil {
254 v, err := GUI.View("logs")
259 log.Println("connected", "sid:", sid,
260 "addr:", conn.LocalAddr().String())
263 time.Sleep(vors.ScreenRefresh)
264 GUI.Update(func(gui *gocui.Gui) error {
273 time.Sleep(100 * time.Millisecond)
279 time.Sleep(vors.PingTime)
280 buf, err := txCS.Encrypt(nil, nil, []byte(vors.CmdPing))
282 log.Fatalln("tx encrypt:", err)
284 if err = vors.PktWrite(ctrl, buf); err != nil {
285 log.Fatalln("tx:", err)
290 go func(seen *time.Time) {
292 for buf := range rx {
293 if string(buf) == vors.CmdPong {
298 cols := strings.Fields(string(buf))
301 sidRaw, name, keyHex := cols[1], cols[2], cols[3]
302 log.Println("add", name, "sid:", sidRaw)
303 sid := parseSID(sidRaw)
304 key, err := hex.DecodeString(keyHex)
310 in: make(chan []byte, 1<<10),
311 stats: &Stats{dead: make(chan struct{})},
314 dec, err := opus.NewDecoder(vors.Rate, 1)
319 var player io.WriteCloser
322 cmd = makeCmd(*playCmd)
323 player, err = cmd.StdinPipe()
333 var ciph *chacha20.Cipher
335 var mac *poly1305.MAC
336 tag := make([]byte, poly1305.TagSize)
338 pcm := make([]int16, vors.FrameLen)
339 pcmbuf := make([]byte, 2*vors.FrameLen)
340 nonce := make([]byte, 12)
344 for buf := range stream.in {
345 copy(nonce[len(nonce)-4:], buf)
346 ciph, err = chacha20.NewUnauthenticatedCipher(key, nonce)
351 ciph.XORKeyStream(macKey[:], macKey[:])
353 mac = poly1305.New(&macKey)
354 if _, err = mac.Write(buf[4 : len(buf)-vors.TagLen]); err != nil {
358 if subtle.ConstantTimeCompare(
360 buf[len(buf)-vors.TagLen:],
362 log.Println("decrypt:", stream.name, "tag differs")
365 pkt = buf[4 : len(buf)-vors.TagLen]
366 ciph.XORKeyStream(pkt, pkt)
368 ctr = binary.BigEndian.Uint32(nonce[len(nonce)-4:])
370 // ignore the very first packet in the stream
373 lost = int(ctr - (stream.ctr + 1))
376 stream.stats.lost += int64(lost)
377 if lost > vors.MaxLost {
380 for ; lost > 0; lost-- {
381 lastDur, err = dec.LastPacketDuration()
383 log.Println("PLC:", err)
386 err = dec.DecodePLC(pcm[:lastDur])
388 log.Println("PLC:", err)
391 stream.stats.AddRMS(pcm)
395 pcmConv(pcmbuf, pcm[:lastDur])
396 if _, err = io.Copy(player, bytes.NewReader(
397 pcmbuf[:2*lastDur])); err != nil {
398 log.Println("play:", err)
401 _, err = dec.Decode(pkt, pcm)
403 log.Println("decode:", err)
406 stream.stats.AddRMS(pcm)
407 stream.stats.last = time.Now()
412 if _, err = io.Copy(player,
413 bytes.NewReader(pcmbuf)); err != nil {
414 log.Println("play:", err)
421 go statsDrawer(stream.stats, stream.name)
422 Streams[sid] = stream
424 sid := parseSID(cols[1])
427 log.Println("unknown sid:", sid)
430 log.Println("del", s.name, "sid:", cols[1])
435 log.Fatal("unknown cmd:", cols[0])
440 go func(seen *time.Time) {
441 for now := range time.Tick(vors.PingTime) {
442 if seen.Add(2 * vors.PingTime).Before(now) {
443 log.Println("timeout:", seen)
453 var from *net.UDPAddr
458 buf := make([]byte, 2*vors.FrameLen)
459 n, from, err = conn.ReadFromUDP(buf)
461 log.Println("recvfrom:", err)
465 if from.Port != srvAddrUDP.Port || !from.IP.Equal(srvAddrUDP.IP) {
466 log.Println("wrong addr:", from)
469 if n <= 4+vors.TagLen {
470 log.Println("too small:", n)
473 stream = Streams[buf[0]]
475 // log.Println("unknown stream:", buf[0])
479 stream.stats.bytes += uint64(n)
480 ctr = binary.BigEndian.Uint32(buf)
481 if ctr <= stream.ctr {
482 stream.stats.reorder++
489 go statsDrawer(OurStats, *Name)
495 if _, err = conn.Write([]byte{sid}); err != nil {
496 log.Println("send:", err)
499 time.Sleep(time.Second)
507 var ciph *chacha20.Cipher
509 var mac *poly1305.MAC
510 tag := make([]byte, poly1305.TagSize)
511 buf := make([]byte, 2*vors.FrameLen)
512 pcm := make([]int16, vors.FrameLen)
513 nonce := make([]byte, 12)
514 nonce[len(nonce)-4] = sid
518 _, err = io.ReadFull(mic, buf)
520 log.Println("mic:", err)
526 for i = 0; i < vors.FrameLen; i++ {
527 pcm[i] = int16(uint16(buf[i*2+0]) | (uint16(buf[i*2+1]) << 8))
529 if vad != 0 && vors.RMS(pcm) < vad {
532 n, err = opusEnc.Encode(pcm, buf[4:])
541 incr(nonce[len(nonce)-3:])
542 copy(buf, nonce[len(nonce)-4:])
543 ciph, err = chacha20.NewUnauthenticatedCipher(keyOur, nonce)
548 ciph.XORKeyStream(macKey[:], macKey[:])
550 ciph.XORKeyStream(buf[4:4+n], buf[4:4+n])
551 mac = poly1305.New(&macKey)
552 if _, err = mac.Write(buf[4 : 4+n]); err != nil {
556 copy(buf[4+n:], tag[:vors.TagLen])
557 pkt = buf[:4+n+vors.TagLen]
560 OurStats.bytes += uint64(len(pkt))
561 OurStats.last = time.Now()
563 if _, err = conn.Write(pkt); err != nil {
564 log.Println("send:", err)
571 if err != nil && err != gocui.ErrQuit {