src/sp.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2019 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, version 3 of the License.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 package nncp
  19
  20 import (
  21         "bytes"
  22         "crypto/subtle"
  23         "errors"
  24         "io"
  25         "net"
  26         "os"
  27         "path/filepath"
  28         "sort"
  29         "strconv"
  30         "sync"
  31         "time"
  32
  33         xdr "github.com/davecgh/go-xdr/xdr2"
  34         "github.com/flynn/noise"
  35 )
  36
  37 const (
  38         MaxSPSize       = 1<<16 - 256
  39         PartSuffix      = ".part"
  40         DefaultDeadline = 10
  41 )
  42
  43 var (
  44         MagicNNCPLv1 [8]byte = [8]byte{'N', 'N', 'C', 'P', 'S', 0, 0, 1}
  45
  46         SPHeadOverhead    int
  47         SPInfoOverhead    int
  48         SPFreqOverhead    int
  49         SPFileOverhead    int
  50         SPHaltMarshalized []byte
  51
  52         NoiseCipherSuite noise.CipherSuite = noise.NewCipherSuite(
  53                 noise.DH25519,
  54                 noise.CipherChaChaPoly,
  55                 noise.HashBLAKE2b,
  56         )
  57
  58         spWorkersGroup sync.WaitGroup
  59 )
  60
  61 type SPType uint8
  62
  63 const (
  64         SPTypeInfo SPType = iota
  65         SPTypeFreq SPType = iota
  66         SPTypeFile SPType = iota
  67         SPTypeDone SPType = iota
  68         SPTypeHalt SPType = iota
  69 )
  70
  71 type SPHead struct {
  72         Type SPType
  73 }
  74
  75 type SPInfo struct {
  76         Nice uint8
  77         Size uint64
  78         Hash *[32]byte
  79 }
  80
  81 type SPFreq struct {
  82         Hash   *[32]byte
  83         Offset uint64
  84 }
  85
  86 type SPFile struct {
  87         Hash    *[32]byte
  88         Offset  uint64
  89         Payload []byte
  90 }
  91
  92 type SPDone struct {
  93         Hash *[32]byte
  94 }
  95
  96 type SPRaw struct {
  97         Magic   [8]byte
  98         Payload []byte
  99 }
 100
 101 type FreqWithNice struct {
 102         freq *SPFreq
 103         nice uint8
 104 }
 105
 106 type ConnDeadlined interface {
 107         io.ReadWriteCloser
 108         SetReadDeadline(t time.Time) error
 109         SetWriteDeadline(t time.Time) error
 110 }
 111
 112 func init() {
 113         var buf bytes.Buffer
 114         spHead := SPHead{Type: SPTypeHalt}
 115         if _, err := xdr.Marshal(&buf, spHead); err != nil {
 116                 panic(err)
 117         }
 118         copy(SPHaltMarshalized, buf.Bytes())
 119         SPHeadOverhead = buf.Len()
 120         buf.Reset()
 121
 122         spInfo := SPInfo{Nice: 123, Size: 123, Hash: new([32]byte)}
 123         if _, err := xdr.Marshal(&buf, spInfo); err != nil {
 124                 panic(err)
 125         }
 126         SPInfoOverhead = buf.Len()
 127         buf.Reset()
 128
 129         spFreq := SPFreq{Hash: new([32]byte), Offset: 123}
 130         if _, err := xdr.Marshal(&buf, spFreq); err != nil {
 131                 panic(err)
 132         }
 133         SPFreqOverhead = buf.Len()
 134         buf.Reset()
 135
 136         spFile := SPFile{Hash: new([32]byte), Offset: 123}
 137         if _, err := xdr.Marshal(&buf, spFile); err != nil {
 138                 panic(err)
 139         }
 140         SPFileOverhead = buf.Len()
 141 }
 142
 143 func MarshalSP(typ SPType, sp interface{}) []byte {
 144         var buf bytes.Buffer
 145         var err error
 146         if _, err = xdr.Marshal(&buf, SPHead{typ}); err != nil {
 147                 panic(err)
 148         }
 149         if _, err = xdr.Marshal(&buf, sp); err != nil {
 150                 panic(err)
 151         }
 152         return buf.Bytes()
 153 }
 154
 155 func payloadsSplit(payloads [][]byte) [][]byte {
 156         var outbounds [][]byte
 157         outbound := make([]byte, 0, MaxSPSize)
 158         for i, payload := range payloads {
 159                 outbound = append(outbound, payload...)
 160                 if i+1 < len(payloads) && len(outbound)+len(payloads[i+1]) > MaxSPSize {
 161                         outbounds = append(outbounds, outbound)
 162                         outbound = make([]byte, 0, MaxSPSize)
 163                 }
 164         }
 165         if len(outbound) > 0 {
 166                 outbounds = append(outbounds, outbound)
 167         }
 168         return outbounds
 169 }
 170
 171 type SPState struct {
 172         Ctx            *Ctx
 173         Node           *Node
 174         Nice           uint8
 175         onlineDeadline uint
 176         maxOnlineTime  uint
 177         hs             *noise.HandshakeState
 178         csOur          *noise.CipherState
 179         csTheir        *noise.CipherState
 180         payloads       chan []byte
 181         infosTheir     map[[32]byte]*SPInfo
 182         infosOurSeen   map[[32]byte]uint8
 183         queueTheir     []*FreqWithNice
 184         wg             sync.WaitGroup
 185         RxBytes        int64
 186         RxLastSeen     time.Time
 187         TxBytes        int64
 188         TxLastSeen     time.Time
 189         started        time.Time
 190         Duration       time.Duration
 191         RxSpeed        int64
 192         TxSpeed        int64
 193         rxLock         *os.File
 194         txLock         *os.File
 195         xxOnly         TRxTx
 196         rxRate         int
 197         txRate         int
 198         isDead         bool
 199         listOnly       bool
 200         onlyPkts       map[[32]byte]bool
 201         sync.RWMutex
 202 }
 203
 204 func (state *SPState) NotAlive() bool {
 205         if state.isDead {
 206                 return true
 207         }
 208         now := time.Now()
 209         if state.maxOnlineTime > 0 && state.started.Add(time.Duration(state.maxOnlineTime)*time.Second).Before(now) {
 210                 return true
 211         }
 212         return uint(now.Sub(state.RxLastSeen).Seconds()) >= state.onlineDeadline &&
 213                 uint(now.Sub(state.TxLastSeen).Seconds()) >= state.onlineDeadline
 214 }
 215
 216 func (state *SPState) dirUnlock() {
 217         state.Ctx.UnlockDir(state.rxLock)
 218         state.Ctx.UnlockDir(state.txLock)
 219 }
 220
 221 func (state *SPState) WriteSP(dst io.Writer, payload []byte) error {
 222         n, err := xdr.Marshal(dst, SPRaw{Magic: MagicNNCPLv1, Payload: payload})
 223         if err == nil {
 224                 state.TxLastSeen = time.Now()
 225                 state.TxBytes += int64(n)
 226         }
 227         return err
 228 }
 229
 230 func (state *SPState) ReadSP(src io.Reader) ([]byte, error) {
 231         var sp SPRaw
 232         n, err := xdr.UnmarshalLimited(src, &sp, 1<<17)
 233         if err != nil {
 234                 ue := err.(*xdr.UnmarshalError)
 235                 if ue.Err == io.EOF {
 236                         return nil, ue.Err
 237                 }
 238                 return nil, err
 239         }
 240         state.RxLastSeen = time.Now()
 241         state.RxBytes += int64(n)
 242         if sp.Magic != MagicNNCPLv1 {
 243                 return nil, BadMagic
 244         }
 245         return sp.Payload, nil
 246 }
 247
 248 func (ctx *Ctx) infosOur(nodeId *NodeId, nice uint8, seen *map[[32]byte]uint8) [][]byte {
 249         var infos []*SPInfo
 250         var totalSize int64
 251         for job := range ctx.Jobs(nodeId, TTx) {
 252                 job.Fd.Close()
 253                 if job.PktEnc.Nice > nice {
 254                         continue
 255                 }
 256                 if _, known := (*seen)[*job.HshValue]; known {
 257                         continue
 258                 }
 259                 totalSize += job.Size
 260                 infos = append(infos, &SPInfo{
 261                         Nice: job.PktEnc.Nice,
 262                         Size: uint64(job.Size),
 263                         Hash: job.HshValue,
 264                 })
 265                 (*seen)[*job.HshValue] = job.PktEnc.Nice
 266         }
 267         sort.Sort(ByNice(infos))
 268         var payloads [][]byte
 269         for _, info := range infos {
 270                 payloads = append(payloads, MarshalSP(SPTypeInfo, info))
 271                 ctx.LogD("sp-info-our", SDS{
 272                         "node": nodeId,
 273                         "name": ToBase32(info.Hash[:]),
 274                         "size": strconv.FormatInt(int64(info.Size), 10),
 275                 }, "")
 276         }
 277         if totalSize > 0 {
 278                 ctx.LogI("sp-infos", SDS{
 279                         "xx":   string(TTx),
 280                         "node": nodeId,
 281                         "pkts": strconv.Itoa(len(payloads)),
 282                         "size": strconv.FormatInt(totalSize, 10),
 283                 }, "")
 284         }
 285         return payloadsSplit(payloads)
 286 }
 287
 288 func (state *SPState) StartI(conn ConnDeadlined) error {
 289         nodeId := state.Node.Id
 290         err := state.Ctx.ensureRxDir(nodeId)
 291         if err != nil {
 292                 return err
 293         }
 294         var rxLock *os.File
 295         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TRx) {
 296                 rxLock, err = state.Ctx.LockDir(nodeId, TRx)
 297                 if err != nil {
 298                         return err
 299                 }
 300         }
 301         var txLock *os.File
 302         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
 303                 txLock, err = state.Ctx.LockDir(nodeId, TTx)
 304                 if err != nil {
 305                         return err
 306                 }
 307         }
 308         started := time.Now()
 309         conf := noise.Config{
 310                 CipherSuite: NoiseCipherSuite,
 311                 Pattern:     noise.HandshakeIK,
 312                 Initiator:   true,
 313                 StaticKeypair: noise.DHKey{
 314                         Private: state.Ctx.Self.NoisePrv[:],
 315                         Public:  state.Ctx.Self.NoisePub[:],
 316                 },
 317                 PeerStatic: state.Node.NoisePub[:],
 318         }
 319         hs, err := noise.NewHandshakeState(conf)
 320         if err != nil {
 321                 return err
 322         }
 323         state.hs = hs
 324         state.payloads = make(chan []byte)
 325         state.infosTheir = make(map[[32]byte]*SPInfo)
 326         state.infosOurSeen = make(map[[32]byte]uint8)
 327         state.started = started
 328         state.rxLock = rxLock
 329         state.txLock = txLock
 330
 331         var infosPayloads [][]byte
 332         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
 333                 infosPayloads = state.Ctx.infosOur(nodeId, state.Nice, &state.infosOurSeen)
 334         }
 335         var firstPayload []byte
 336         if len(infosPayloads) > 0 {
 337                 firstPayload = infosPayloads[0]
 338         }
 339         // Pad first payload, to hide actual number of existing files
 340         for i := 0; i < (MaxSPSize-len(firstPayload))/SPHeadOverhead; i++ {
 341                 firstPayload = append(firstPayload, SPHaltMarshalized...)
 342         }
 343
 344         var buf []byte
 345         var payload []byte
 346         buf, _, _, err = state.hs.WriteMessage(nil, firstPayload)
 347         if err != nil {
 348                 state.dirUnlock()
 349                 return err
 350         }
 351         sds := SDS{"node": nodeId, "nice": strconv.Itoa(int(state.Nice))}
 352         state.Ctx.LogD("sp-start", sds, "sending first message")
 353         conn.SetWriteDeadline(time.Now().Add(DefaultDeadline * time.Second))
 354         if err = state.WriteSP(conn, buf); err != nil {
 355                 state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
 356                 state.dirUnlock()
 357                 return err
 358         }
 359         state.Ctx.LogD("sp-start", sds, "waiting for first message")
 360         conn.SetReadDeadline(time.Now().Add(DefaultDeadline * time.Second))
 361         if buf, err = state.ReadSP(conn); err != nil {
 362                 state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
 363                 state.dirUnlock()
 364                 return err
 365         }
 366         payload, state.csOur, state.csTheir, err = state.hs.ReadMessage(nil, buf)
 367         if err != nil {
 368                 state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
 369                 state.dirUnlock()
 370                 return err
 371         }
 372         state.Ctx.LogD("sp-start", sds, "starting workers")
 373         err = state.StartWorkers(conn, infosPayloads, payload)
 374         if err != nil {
 375                 state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
 376                 state.dirUnlock()
 377                 return err
 378         }
 379         return err
 380 }
 381
 382 func (state *SPState) StartR(conn ConnDeadlined) error {
 383         started := time.Now()
 384         conf := noise.Config{
 385                 CipherSuite: NoiseCipherSuite,
 386                 Pattern:     noise.HandshakeIK,
 387                 Initiator:   false,
 388                 StaticKeypair: noise.DHKey{
 389                         Private: state.Ctx.Self.NoisePrv[:],
 390                         Public:  state.Ctx.Self.NoisePub[:],
 391                 },
 392         }
 393         hs, err := noise.NewHandshakeState(conf)
 394         if err != nil {
 395                 return err
 396         }
 397         xxOnly := TRxTx("")
 398         state.hs = hs
 399         state.payloads = make(chan []byte)
 400         state.infosOurSeen = make(map[[32]byte]uint8)
 401         state.infosTheir = make(map[[32]byte]*SPInfo)
 402         state.started = started
 403         state.xxOnly = xxOnly
 404         var buf []byte
 405         var payload []byte
 406         state.Ctx.LogD(
 407                 "sp-start",
 408                 SDS{"nice": strconv.Itoa(int(state.Nice))},
 409                 "waiting for first message",
 410         )
 411         conn.SetReadDeadline(time.Now().Add(DefaultDeadline * time.Second))
 412         if buf, err = state.ReadSP(conn); err != nil {
 413                 state.Ctx.LogE("sp-start", SDS{"err": err}, "")
 414                 return err
 415         }
 416         if payload, _, _, err = state.hs.ReadMessage(nil, buf); err != nil {
 417                 state.Ctx.LogE("sp-start", SDS{"err": err}, "")
 418                 return err
 419         }
 420
 421         var node *Node
 422         for _, n := range state.Ctx.Neigh {
 423                 if subtle.ConstantTimeCompare(state.hs.PeerStatic(), n.NoisePub[:]) == 1 {
 424                         node = n
 425                         break
 426                 }
 427         }
 428         if node == nil {
 429                 peerId := ToBase32(state.hs.PeerStatic())
 430                 state.Ctx.LogE("sp-start", SDS{"peer": peerId}, "unknown")
 431                 return errors.New("Unknown peer: " + peerId)
 432         }
 433         state.Node = node
 434         state.rxRate = node.RxRate
 435         state.txRate = node.TxRate
 436         state.onlineDeadline = node.OnlineDeadline
 437         state.maxOnlineTime = node.MaxOnlineTime
 438         sds := SDS{"node": node.Id, "nice": strconv.Itoa(int(state.Nice))}
 439
 440         if state.Ctx.ensureRxDir(node.Id); err != nil {
 441                 return err
 442         }
 443         var rxLock *os.File
 444         if xxOnly == "" || xxOnly == TRx {
 445                 rxLock, err = state.Ctx.LockDir(node.Id, TRx)
 446                 if err != nil {
 447                         return err
 448                 }
 449         }
 450         state.rxLock = rxLock
 451         var txLock *os.File
 452         if xxOnly == "" || xxOnly == TTx {
 453                 txLock, err = state.Ctx.LockDir(node.Id, TTx)
 454                 if err != nil {
 455                         return err
 456                 }
 457         }
 458         state.txLock = txLock
 459
 460         var infosPayloads [][]byte
 461         if xxOnly == "" || xxOnly == TTx {
 462                 infosPayloads = state.Ctx.infosOur(node.Id, state.Nice, &state.infosOurSeen)
 463         }
 464         var firstPayload []byte
 465         if len(infosPayloads) > 0 {
 466                 firstPayload = infosPayloads[0]
 467         }
 468         // Pad first payload, to hide actual number of existing files
 469         for i := 0; i < (MaxSPSize-len(firstPayload))/SPHeadOverhead; i++ {
 470                 firstPayload = append(firstPayload, SPHaltMarshalized...)
 471         }
 472
 473         state.Ctx.LogD("sp-start", sds, "sending first message")
 474         buf, state.csTheir, state.csOur, err = state.hs.WriteMessage(nil, firstPayload)
 475         if err != nil {
 476                 state.dirUnlock()
 477                 return err
 478         }
 479         conn.SetWriteDeadline(time.Now().Add(DefaultDeadline * time.Second))
 480         if err = state.WriteSP(conn, buf); err != nil {
 481                 state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
 482                 state.dirUnlock()
 483                 return err
 484         }
 485         state.Ctx.LogD("sp-start", sds, "starting workers")
 486         err = state.StartWorkers(conn, infosPayloads, payload)
 487         if err != nil {
 488                 state.dirUnlock()
 489                 return err
 490         }
 491         return err
 492 }
 493
 494 func (state *SPState) StartWorkers(
 495         conn ConnDeadlined,
 496         infosPayloads [][]byte,
 497         payload []byte) error {
 498         sds := SDS{"node": state.Node.Id, "nice": strconv.Itoa(int(state.Nice))}
 499         if len(infosPayloads) > 1 {
 500                 go func() {
 501                         for _, payload := range infosPayloads[1:] {
 502                                 state.Ctx.LogD(
 503                                         "sp-work",
 504                                         SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
 505                                         "queuing remaining payload",
 506                                 )
 507                                 state.payloads <- payload
 508                         }
 509                 }()
 510         }
 511         state.Ctx.LogD(
 512                 "sp-work",
 513                 SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
 514                 "processing first payload",
 515         )
 516         replies, err := state.ProcessSP(payload)
 517         if err != nil {
 518                 state.Ctx.LogE("sp-work", SdsAdd(sds, SDS{"err": err}), "")
 519                 return err
 520         }
 521
 522         go func() {
 523                 for _, reply := range replies {
 524                         state.Ctx.LogD(
 525                                 "sp-work",
 526                                 SdsAdd(sds, SDS{"size": strconv.Itoa(len(reply))}),
 527                                 "queuing reply",
 528                         )
 529                         state.payloads <- reply
 530                 }
 531         }()
 532
 533         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
 534                 go func() {
 535                         for range time.Tick(time.Second) {
 536                                 if state.NotAlive() {
 537                                         return
 538                                 }
 539                                 for _, payload := range state.Ctx.infosOur(
 540                                         state.Node.Id,
 541                                         state.Nice,
 542                                         &state.infosOurSeen,
 543                                 ) {
 544                                         state.Ctx.LogD(
 545                                                 "sp-work",
 546                                                 SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
 547                                                 "queuing new info",
 548                                         )
 549                                         state.payloads <- payload
 550                                 }
 551                         }
 552                 }()
 553         }
 554
 555         state.wg.Add(1)
 556         go func() {
 557                 defer func() {
 558                         state.isDead = true
 559                         state.wg.Done()
 560                 }()
 561                 for {
 562                         if state.NotAlive() {
 563                                 return
 564                         }
 565                         var payload []byte
 566                         select {
 567                         case payload = <-state.payloads:
 568                                 state.Ctx.LogD(
 569                                         "sp-xmit",
 570                                         SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
 571                                         "got payload",
 572                                 )
 573                         default:
 574                         }
 575                         if payload == nil {
 576                                 state.RLock()
 577                                 if len(state.queueTheir) == 0 {
 578                                         state.Ctx.LogD("sp-xmit", sds, "file queue is empty")
 579                                         state.RUnlock()
 580                                         time.Sleep(100 * time.Millisecond)
 581                                         continue
 582                                 }
 583                                 freq := state.queueTheir[0].freq
 584                                 state.RUnlock()
 585
 586                                 if state.txRate > 0 {
 587                                         time.Sleep(time.Second / time.Duration(state.txRate))
 588                                 }
 589
 590                                 sdsp := SdsAdd(sds, SDS{
 591                                         "xx":   string(TTx),
 592                                         "hash": ToBase32(freq.Hash[:]),
 593                                         "size": strconv.FormatInt(int64(freq.Offset), 10),
 594                                 })
 595                                 state.Ctx.LogD("sp-file", sdsp, "queueing")
 596                                 fd, err := os.Open(filepath.Join(
 597                                         state.Ctx.Spool,
 598                                         state.Node.Id.String(),
 599                                         string(TTx),
 600                                         ToBase32(freq.Hash[:]),
 601                                 ))
 602                                 if err != nil {
 603                                         state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
 604                                         break
 605                                 }
 606                                 fi, err := fd.Stat()
 607                                 if err != nil {
 608                                         state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
 609                                         break
 610                                 }
 611                                 fullSize := uint64(fi.Size())
 612                                 var buf []byte
 613                                 if freq.Offset < fullSize {
 614                                         state.Ctx.LogD("sp-file", sdsp, "seeking")
 615                                         if _, err = fd.Seek(int64(freq.Offset), io.SeekStart); err != nil {
 616                                                 state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
 617                                                 break
 618                                         }
 619                                         buf = make([]byte, MaxSPSize-SPHeadOverhead-SPFileOverhead)
 620                                         n, err := fd.Read(buf)
 621                                         if err != nil {
 622                                                 state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
 623                                                 break
 624                                         }
 625                                         buf = buf[:n]
 626                                         state.Ctx.LogD(
 627                                                 "sp-file",
 628                                                 SdsAdd(sdsp, SDS{"size": strconv.Itoa(n)}),
 629                                                 "read",
 630                                         )
 631                                 }
 632                                 fd.Close()
 633                                 payload = MarshalSP(SPTypeFile, SPFile{
 634                                         Hash:    freq.Hash,
 635                                         Offset:  freq.Offset,
 636                                         Payload: buf,
 637                                 })
 638                                 ourSize := freq.Offset + uint64(len(buf))
 639                                 sdsp["size"] = strconv.FormatInt(int64(ourSize), 10)
 640                                 sdsp["fullsize"] = strconv.FormatInt(int64(fullSize), 10)
 641                                 state.Ctx.LogP("sp-file", sdsp, "")
 642                                 state.Lock()
 643                                 if len(state.queueTheir) > 0 && *state.queueTheir[0].freq.Hash == *freq.Hash {
 644                                         if ourSize == fullSize {
 645                                                 state.Ctx.LogD("sp-file", sdsp, "finished")
 646                                                 if len(state.queueTheir) > 1 {
 647                                                         state.queueTheir = state.queueTheir[1:]
 648                                                 } else {
 649                                                         state.queueTheir = state.queueTheir[:0]
 650                                                 }
 651                                         } else {
 652                                                 state.queueTheir[0].freq.Offset += uint64(len(buf))
 653                                         }
 654                                 } else {
 655                                         state.Ctx.LogD("sp-file", sdsp, "queue disappeared")
 656                                 }
 657                                 state.Unlock()
 658                         }
 659                         state.Ctx.LogD(
 660                                 "sp-xmit",
 661                                 SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
 662                                 "sending",
 663                         )
 664                         conn.SetWriteDeadline(time.Now().Add(DefaultDeadline * time.Second))
 665                         if err := state.WriteSP(conn, state.csOur.Encrypt(nil, nil, payload)); err != nil {
 666                                 state.Ctx.LogE("sp-xmit", SdsAdd(sds, SDS{"err": err}), "")
 667                                 break
 668                         }
 669                 }
 670         }()
 671
 672         state.wg.Add(1)
 673         go func() {
 674                 defer func() {
 675                         state.isDead = true
 676                         state.wg.Done()
 677                 }()
 678                 for {
 679                         if state.NotAlive() {
 680                                 return
 681                         }
 682                         state.Ctx.LogD("sp-recv", sds, "waiting for payload")
 683                         conn.SetReadDeadline(time.Now().Add(DefaultDeadline * time.Second))
 684                         payload, err := state.ReadSP(conn)
 685                         if err != nil {
 686                                 unmarshalErr := err.(*xdr.UnmarshalError)
 687                                 netErr, ok := unmarshalErr.Err.(net.Error)
 688                                 if ok && netErr.Timeout() {
 689                                         continue
 690                                 }
 691                                 if unmarshalErr.ErrorCode == xdr.ErrIO {
 692                                         break
 693                                 }
 694                                 state.Ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
 695                                 break
 696                         }
 697                         state.Ctx.LogD(
 698                                 "sp-recv",
 699                                 SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
 700                                 "got payload",
 701                         )
 702                         payload, err = state.csTheir.Decrypt(nil, nil, payload)
 703                         if err != nil {
 704                                 state.Ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
 705                                 break
 706                         }
 707                         state.Ctx.LogD(
 708                                 "sp-recv",
 709                                 SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
 710                                 "processing",
 711                         )
 712                         replies, err := state.ProcessSP(payload)
 713                         if err != nil {
 714                                 state.Ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
 715                                 break
 716                         }
 717                         go func() {
 718                                 for _, reply := range replies {
 719                                         state.Ctx.LogD(
 720                                                 "sp-recv",
 721                                                 SdsAdd(sds, SDS{"size": strconv.Itoa(len(reply))}),
 722                                                 "queuing reply",
 723                                         )
 724                                         state.payloads <- reply
 725                                 }
 726                         }()
 727                         if state.rxRate > 0 {
 728                                 time.Sleep(time.Second / time.Duration(state.rxRate))
 729                         }
 730                 }
 731         }()
 732
 733         return nil
 734 }
 735
 736 func (state *SPState) Wait() {
 737         state.wg.Wait()
 738         state.dirUnlock()
 739         state.Duration = time.Now().Sub(state.started)
 740         state.RxSpeed = state.RxBytes
 741         state.TxSpeed = state.TxBytes
 742         rxDuration := int64(state.RxLastSeen.Sub(state.started).Seconds())
 743         txDuration := int64(state.TxLastSeen.Sub(state.started).Seconds())
 744         if rxDuration > 0 {
 745                 state.RxSpeed = state.RxBytes / rxDuration
 746         }
 747         if txDuration > 0 {
 748                 state.TxSpeed = state.TxBytes / txDuration
 749         }
 750 }
 751
 752 func (state *SPState) ProcessSP(payload []byte) ([][]byte, error) {
 753         sds := SDS{"node": state.Node.Id, "nice": strconv.Itoa(int(state.Nice))}
 754         r := bytes.NewReader(payload)
 755         var err error
 756         var replies [][]byte
 757         var infosGot bool
 758         for r.Len() > 0 {
 759                 state.Ctx.LogD("sp-process", sds, "unmarshaling header")
 760                 var head SPHead
 761                 if _, err = xdr.Unmarshal(r, &head); err != nil {
 762                         state.Ctx.LogE("sp-process", SdsAdd(sds, SDS{"err": err}), "")
 763                         return nil, err
 764                 }
 765                 switch head.Type {
 766                 case SPTypeInfo:
 767                         infosGot = true
 768                         sdsp := SdsAdd(sds, SDS{"type": "info"})
 769                         state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
 770                         var info SPInfo
 771                         if _, err = xdr.Unmarshal(r, &info); err != nil {
 772                                 state.Ctx.LogE("sp-process", SdsAdd(sdsp, SDS{"err": err}), "")
 773                                 return nil, err
 774                         }
 775                         sdsp = SdsAdd(sds, SDS{
 776                                 "hash": ToBase32(info.Hash[:]),
 777                                 "size": strconv.FormatInt(int64(info.Size), 10),
 778                                 "nice": strconv.Itoa(int(info.Nice)),
 779                         })
 780                         if !state.listOnly && info.Nice > state.Nice {
 781                                 state.Ctx.LogD("sp-process", sdsp, "too nice")
 782                                 continue
 783                         }
 784                         state.Ctx.LogD("sp-process", sdsp, "received")
 785                         if !state.listOnly && state.xxOnly == TTx {
 786                                 continue
 787                         }
 788                         state.Lock()
 789                         state.infosTheir[*info.Hash] = &info
 790                         state.Unlock()
 791                         state.Ctx.LogD("sp-process", sdsp, "stating part")
 792                         pktPath := filepath.Join(
 793                                 state.Ctx.Spool,
 794                                 state.Node.Id.String(),
 795                                 string(TRx),
 796                                 ToBase32(info.Hash[:]),
 797                         )
 798                         if _, err = os.Stat(pktPath); err == nil {
 799                                 state.Ctx.LogI("sp-info", sdsp, "already done")
 800                                 if !state.listOnly {
 801                                         replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
 802                                 }
 803                                 continue
 804                         }
 805                         if _, err = os.Stat(pktPath + SeenSuffix); err == nil {
 806                                 state.Ctx.LogI("sp-info", sdsp, "already seen")
 807                                 if !state.listOnly {
 808                                         replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
 809                                 }
 810                                 continue
 811                         }
 812                         fi, err := os.Stat(pktPath + PartSuffix)
 813                         var offset int64
 814                         if err == nil {
 815                                 offset = fi.Size()
 816                         }
 817                         if !state.Ctx.IsEnoughSpace(int64(info.Size) - offset) {
 818                                 state.Ctx.LogI("sp-info", sdsp, "not enough space")
 819                                 continue
 820                         }
 821                         state.Ctx.LogI(
 822                                 "sp-info",
 823                                 SdsAdd(sdsp, SDS{"offset": strconv.FormatInt(offset, 10)}),
 824                                 "",
 825                         )
 826                         if !state.listOnly && (state.onlyPkts == nil || state.onlyPkts[*info.Hash]) {
 827                                 replies = append(replies, MarshalSP(
 828                                         SPTypeFreq,
 829                                         SPFreq{info.Hash, uint64(offset)},
 830                                 ))
 831                         }
 832                 case SPTypeFile:
 833                         sdsp := SdsAdd(sds, SDS{"type": "file"})
 834                         state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
 835                         var file SPFile
 836                         if _, err = xdr.Unmarshal(r, &file); err != nil {
 837                                 state.Ctx.LogE("sp-process", SdsAdd(sds, SDS{
 838                                         "err":  err,
 839                                         "type": "file",
 840                                 }), "")
 841                                 return nil, err
 842                         }
 843                         sdsp["xx"] = string(TRx)
 844                         sdsp["hash"] = ToBase32(file.Hash[:])
 845                         sdsp["size"] = strconv.Itoa(len(file.Payload))
 846                         dirToSync := filepath.Join(
 847                                 state.Ctx.Spool,
 848                                 state.Node.Id.String(),
 849                                 string(TRx),
 850                         )
 851                         filePath := filepath.Join(dirToSync, ToBase32(file.Hash[:]))
 852                         state.Ctx.LogD("sp-file", sdsp, "opening part")
 853                         fd, err := os.OpenFile(
 854                                 filePath+PartSuffix,
 855                                 os.O_RDWR|os.O_CREATE,
 856                                 os.FileMode(0666),
 857                         )
 858                         if err != nil {
 859                                 state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
 860                                 return nil, err
 861                         }
 862                         state.Ctx.LogD(
 863                                 "sp-file",
 864                                 SdsAdd(sdsp, SDS{"offset": strconv.FormatInt(int64(file.Offset), 10)}),
 865                                 "seeking",
 866                         )
 867                         if _, err = fd.Seek(int64(file.Offset), io.SeekStart); err != nil {
 868                                 state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
 869                                 fd.Close()
 870                                 return nil, err
 871                         }
 872                         state.Ctx.LogD("sp-file", sdsp, "writing")
 873                         _, err = fd.Write(file.Payload)
 874                         if err != nil {
 875                                 state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
 876                                 fd.Close()
 877                                 return nil, err
 878                         }
 879                         ourSize := uint64(file.Offset) + uint64(len(file.Payload))
 880                         state.RLock()
 881                         sdsp["fullsize"] = strconv.FormatInt(int64(state.infosTheir[*file.Hash].Size), 10)
 882                         sdsp["size"] = strconv.FormatInt(int64(ourSize), 10)
 883                         state.Ctx.LogP("sp-file", sdsp, "")
 884                         if state.infosTheir[*file.Hash].Size != ourSize {
 885                                 state.RUnlock()
 886                                 fd.Close()
 887                                 continue
 888                         }
 889                         state.RUnlock()
 890                         spWorkersGroup.Wait()
 891                         spWorkersGroup.Add(1)
 892                         go func() {
 893                                 if err := fd.Sync(); err != nil {
 894                                         state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "sync")
 895                                         fd.Close()
 896                                         return
 897                                 }
 898                                 state.wg.Add(1)
 899                                 defer state.wg.Done()
 900                                 fd.Seek(0, io.SeekStart)
 901                                 state.Ctx.LogD("sp-file", sdsp, "checking")
 902                                 gut, err := Check(fd, file.Hash[:])
 903                                 fd.Close()
 904                                 if err != nil || !gut {
 905                                         state.Ctx.LogE("sp-file", sdsp, "checksum mismatch")
 906                                         return
 907                                 }
 908                                 state.Ctx.LogI("sp-done", SdsAdd(sdsp, SDS{"xx": string(TRx)}), "")
 909                                 if err = os.Rename(filePath+PartSuffix, filePath); err != nil {
 910                                         state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "rename")
 911                                         return
 912                                 }
 913                                 if err = DirSync(dirToSync); err != nil {
 914                                         state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "sync")
 915                                         return
 916                                 }
 917                                 state.Lock()
 918                                 delete(state.infosTheir, *file.Hash)
 919                                 state.Unlock()
 920                                 spWorkersGroup.Done()
 921                                 go func() {
 922                                         state.payloads <- MarshalSP(SPTypeDone, SPDone{file.Hash})
 923                                 }()
 924                         }()
 925                 case SPTypeDone:
 926                         sdsp := SdsAdd(sds, SDS{"type": "done"})
 927                         state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
 928                         var done SPDone
 929                         if _, err = xdr.Unmarshal(r, &done); err != nil {
 930                                 state.Ctx.LogE("sp-process", SdsAdd(sds, SDS{
 931                                         "type": "done",
 932                                         "err":  err,
 933                                 }), "")
 934                                 return nil, err
 935                         }
 936                         sdsp["hash"] = ToBase32(done.Hash[:])
 937                         state.Ctx.LogD("sp-done", sdsp, "removing")
 938                         err := os.Remove(filepath.Join(
 939                                 state.Ctx.Spool,
 940                                 state.Node.Id.String(),
 941                                 string(TTx),
 942                                 ToBase32(done.Hash[:]),
 943                         ))
 944                         sdsp["xx"] = string(TTx)
 945                         if err == nil {
 946                                 state.Ctx.LogI("sp-done", sdsp, "")
 947                         } else {
 948                                 state.Ctx.LogE("sp-done", sdsp, "")
 949                         }
 950                 case SPTypeFreq:
 951                         sdsp := SdsAdd(sds, SDS{"type": "freq"})
 952                         state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
 953                         var freq SPFreq
 954                         if _, err = xdr.Unmarshal(r, &freq); err != nil {
 955                                 state.Ctx.LogE("sp-process", SdsAdd(sdsp, SDS{"err": err}), "")
 956                                 return nil, err
 957                         }
 958                         sdsp["hash"] = ToBase32(freq.Hash[:])
 959                         sdsp["offset"] = strconv.FormatInt(int64(freq.Offset), 10)
 960                         state.Ctx.LogD("sp-process", sdsp, "queueing")
 961                         nice, exists := state.infosOurSeen[*freq.Hash]
 962                         if exists {
 963                                 if state.onlyPkts == nil || !state.onlyPkts[*freq.Hash] {
 964                                         state.Lock()
 965                                         insertIdx := 0
 966                                         var freqWithNice *FreqWithNice
 967                                         for insertIdx, freqWithNice = range state.queueTheir {
 968                                                 if freqWithNice.nice > nice {
 969                                                         break
 970                                                 }
 971                                         }
 972                                         state.queueTheir = append(state.queueTheir, nil)
 973                                         copy(state.queueTheir[insertIdx+1:], state.queueTheir[insertIdx:])
 974                                         state.queueTheir[insertIdx] = &FreqWithNice{&freq, nice}
 975                                         state.Unlock()
 976                                 } else {
 977                                         state.Ctx.LogD("sp-process", sdsp, "skipping")
 978                                 }
 979                         } else {
 980                                 state.Ctx.LogD("sp-process", sdsp, "unknown")
 981                         }
 982                 case SPTypeHalt:
 983                         state.Ctx.LogD("sp-process", SdsAdd(sds, SDS{"type": "halt"}), "")
 984                         state.Lock()
 985                         state.queueTheir = nil
 986                         state.Unlock()
 987                 default:
 988                         state.Ctx.LogE(
 989                                 "sp-process",
 990                                 SdsAdd(sds, SDS{"type": head.Type}),
 991                                 "unknown",
 992                         )
 993                         return nil, BadPktType
 994                 }
 995         }
 996         if infosGot {
 997                 var pkts int
 998                 var size uint64
 999                 state.RLock()
1000                 for _, info := range state.infosTheir {
1001                         pkts++
1002                         size += info.Size
1003                 }
1004                 state.RUnlock()
1005                 state.Ctx.LogI("sp-infos", SDS{
1006                         "xx":   string(TRx),
1007                         "node": state.Node.Id,
1008                         "pkts": strconv.Itoa(pkts),
1009                         "size": strconv.FormatInt(int64(size), 10),
1010                 }, "")
1011         }
1012         return payloadsSplit(replies), nil
1013 }