src/sp.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2021 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         "fmt"
  25         "io"
  26         "os"
  27         "path/filepath"
  28         "sort"
  29         "sync"
  30         "time"
  31
  32         xdr "github.com/davecgh/go-xdr/xdr2"
  33         "github.com/dustin/go-humanize"
  34         "github.com/flynn/noise"
  35 )
  36
  37 const (
  38         MaxSPSize      = 1<<16 - 256
  39         PartSuffix     = ".part"
  40         SPHeadOverhead = 4
  41 )
  42
  43 type MTHAndOffset struct {
  44         mth    MTH
  45         offset uint64
  46 }
  47
  48 type SPCheckerTask struct {
  49         nodeId *NodeId
  50         hsh    *[MTHSize]byte
  51         mth    MTH
  52         done   chan []byte
  53 }
  54
  55 var (
  56         SPInfoOverhead    int
  57         SPFreqOverhead    int
  58         SPFileOverhead    int
  59         SPHaltMarshalized []byte
  60         SPPingMarshalized []byte
  61
  62         NoiseCipherSuite noise.CipherSuite = noise.NewCipherSuite(
  63                 noise.DH25519,
  64                 noise.CipherChaChaPoly,
  65                 noise.HashBLAKE2b,
  66         )
  67
  68         DefaultDeadline = 10 * time.Second
  69         PingTimeout     = time.Minute
  70
  71         spCheckerTasks chan SPCheckerTask
  72         SPCheckerWg    sync.WaitGroup
  73         spCheckerOnce  sync.Once
  74 )
  75
  76 type FdAndFullSize struct {
  77         fd       *os.File
  78         fullSize int64
  79 }
  80
  81 type SPType uint8
  82
  83 const (
  84         SPTypeInfo SPType = iota
  85         SPTypeFreq SPType = iota
  86         SPTypeFile SPType = iota
  87         SPTypeDone SPType = iota
  88         SPTypeHalt SPType = iota
  89         SPTypePing SPType = iota
  90 )
  91
  92 type SPHead struct {
  93         Type SPType
  94 }
  95
  96 type SPInfo struct {
  97         Nice uint8
  98         Size uint64
  99         Hash *[MTHSize]byte
 100 }
 101
 102 type SPFreq struct {
 103         Hash   *[MTHSize]byte
 104         Offset uint64
 105 }
 106
 107 type SPFile struct {
 108         Hash    *[MTHSize]byte
 109         Offset  uint64
 110         Payload []byte
 111 }
 112
 113 type SPDone struct {
 114         Hash *[MTHSize]byte
 115 }
 116
 117 type SPRaw struct {
 118         Magic   [8]byte
 119         Payload []byte
 120 }
 121
 122 type FreqWithNice struct {
 123         freq *SPFreq
 124         nice uint8
 125 }
 126
 127 type ConnDeadlined interface {
 128         io.ReadWriteCloser
 129         SetReadDeadline(t time.Time) error
 130         SetWriteDeadline(t time.Time) error
 131 }
 132
 133 func init() {
 134         var buf bytes.Buffer
 135         spHead := SPHead{Type: SPTypeHalt}
 136         if _, err := xdr.Marshal(&buf, spHead); err != nil {
 137                 panic(err)
 138         }
 139         SPHaltMarshalized = make([]byte, SPHeadOverhead)
 140         copy(SPHaltMarshalized, buf.Bytes())
 141         buf.Reset()
 142
 143         spHead = SPHead{Type: SPTypePing}
 144         if _, err := xdr.Marshal(&buf, spHead); err != nil {
 145                 panic(err)
 146         }
 147         SPPingMarshalized = make([]byte, SPHeadOverhead)
 148         copy(SPPingMarshalized, buf.Bytes())
 149         buf.Reset()
 150
 151         spInfo := SPInfo{Nice: 123, Size: 123, Hash: new([MTHSize]byte)}
 152         if _, err := xdr.Marshal(&buf, spInfo); err != nil {
 153                 panic(err)
 154         }
 155         SPInfoOverhead = buf.Len()
 156         buf.Reset()
 157
 158         spFreq := SPFreq{Hash: new([MTHSize]byte), Offset: 123}
 159         if _, err := xdr.Marshal(&buf, spFreq); err != nil {
 160                 panic(err)
 161         }
 162         SPFreqOverhead = buf.Len()
 163         buf.Reset()
 164
 165         spFile := SPFile{Hash: new([MTHSize]byte), Offset: 123}
 166         if _, err := xdr.Marshal(&buf, spFile); err != nil {
 167                 panic(err)
 168         }
 169         SPFileOverhead = buf.Len()
 170         spCheckerTasks = make(chan SPCheckerTask)
 171 }
 172
 173 func MarshalSP(typ SPType, sp interface{}) []byte {
 174         var buf bytes.Buffer
 175         if _, err := xdr.Marshal(&buf, SPHead{typ}); err != nil {
 176                 panic(err)
 177         }
 178         if _, err := xdr.Marshal(&buf, sp); err != nil {
 179                 panic(err)
 180         }
 181         return buf.Bytes()
 182 }
 183
 184 func payloadsSplit(payloads [][]byte) [][]byte {
 185         var outbounds [][]byte
 186         outbound := make([]byte, 0, MaxSPSize)
 187         for i, payload := range payloads {
 188                 outbound = append(outbound, payload...)
 189                 if i+1 < len(payloads) && len(outbound)+len(payloads[i+1]) > MaxSPSize {
 190                         outbounds = append(outbounds, outbound)
 191                         outbound = make([]byte, 0, MaxSPSize)
 192                 }
 193         }
 194         if len(outbound) > 0 {
 195                 outbounds = append(outbounds, outbound)
 196         }
 197         return outbounds
 198 }
 199
 200 type SPState struct {
 201         Ctx            *Ctx
 202         Node           *Node
 203         Nice           uint8
 204         NoCK           bool
 205         onlineDeadline time.Duration
 206         maxOnlineTime  time.Duration
 207         hs             *noise.HandshakeState
 208         csOur          *noise.CipherState
 209         csTheir        *noise.CipherState
 210         payloads       chan []byte
 211         pings          chan struct{}
 212         infosTheir     map[[MTHSize]byte]*SPInfo
 213         infosOurSeen   map[[MTHSize]byte]uint8
 214         queueTheir     []*FreqWithNice
 215         wg             sync.WaitGroup
 216         RxBytes        int64
 217         RxLastSeen     time.Time
 218         RxLastNonPing  time.Time
 219         TxBytes        int64
 220         TxLastSeen     time.Time
 221         TxLastNonPing  time.Time
 222         started        time.Time
 223         mustFinishAt   time.Time
 224         Duration       time.Duration
 225         RxSpeed        int64
 226         TxSpeed        int64
 227         rxLock         *os.File
 228         txLock         *os.File
 229         xxOnly         TRxTx
 230         rxRate         int
 231         txRate         int
 232         isDead         chan struct{}
 233         listOnly       bool
 234         onlyPkts       map[[MTHSize]byte]bool
 235         writeSPBuf     bytes.Buffer
 236         fds            map[string]FdAndFullSize
 237         fdsLock        sync.RWMutex
 238         fileHashers    map[string]*MTHAndOffset
 239         progressBars   map[string]struct{}
 240         sync.RWMutex
 241 }
 242
 243 func (state *SPState) SetDead() {
 244         state.Lock()
 245         defer state.Unlock()
 246         select {
 247         case <-state.isDead:
 248                 // Already closed channel, dead
 249                 return
 250         default:
 251         }
 252         close(state.isDead)
 253         go func() {
 254                 for range state.payloads {
 255                 }
 256         }()
 257         go func() {
 258                 for range state.pings {
 259                 }
 260         }()
 261 }
 262
 263 func (state *SPState) NotAlive() bool {
 264         select {
 265         case <-state.isDead:
 266                 return true
 267         default:
 268         }
 269         return false
 270 }
 271
 272 func (state *SPState) dirUnlock() {
 273         state.Ctx.UnlockDir(state.rxLock)
 274         state.Ctx.UnlockDir(state.txLock)
 275 }
 276
 277 func (state *SPState) WriteSP(dst io.Writer, payload []byte, ping bool) error {
 278         state.writeSPBuf.Reset()
 279         n, err := xdr.Marshal(&state.writeSPBuf, SPRaw{
 280                 Magic:   MagicNNCPSv1.B,
 281                 Payload: payload,
 282         })
 283         if err != nil {
 284                 return err
 285         }
 286         if n, err = dst.Write(state.writeSPBuf.Bytes()); err == nil {
 287                 state.TxLastSeen = time.Now()
 288                 state.TxBytes += int64(n)
 289                 if !ping {
 290                         state.TxLastNonPing = state.TxLastSeen
 291                 }
 292         }
 293         return err
 294 }
 295
 296 func (state *SPState) ReadSP(src io.Reader) ([]byte, error) {
 297         var sp SPRaw
 298         n, err := xdr.UnmarshalLimited(src, &sp, 1<<17)
 299         if err != nil {
 300                 ue := err.(*xdr.UnmarshalError)
 301                 if ue.Err == io.EOF {
 302                         return nil, ue.Err
 303                 }
 304                 return nil, err
 305         }
 306         state.RxLastSeen = time.Now()
 307         state.RxBytes += int64(n)
 308         if sp.Magic != MagicNNCPSv1.B {
 309                 return nil, BadMagic
 310         }
 311         return sp.Payload, nil
 312 }
 313
 314 func (ctx *Ctx) infosOur(nodeId *NodeId, nice uint8, seen *map[[MTHSize]byte]uint8) [][]byte {
 315         var infos []*SPInfo
 316         var totalSize int64
 317         for job := range ctx.Jobs(nodeId, TTx) {
 318                 if job.PktEnc.Nice > nice {
 319                         continue
 320                 }
 321                 if _, known := (*seen)[*job.HshValue]; known {
 322                         continue
 323                 }
 324                 totalSize += job.Size
 325                 infos = append(infos, &SPInfo{
 326                         Nice: job.PktEnc.Nice,
 327                         Size: uint64(job.Size),
 328                         Hash: job.HshValue,
 329                 })
 330                 (*seen)[*job.HshValue] = job.PktEnc.Nice
 331         }
 332         sort.Sort(ByNice(infos))
 333         var payloads [][]byte
 334         for _, info := range infos {
 335                 payloads = append(payloads, MarshalSP(SPTypeInfo, info))
 336                 pktName := Base32Codec.EncodeToString(info.Hash[:])
 337                 ctx.LogD("sp-info-our", LEs{
 338                         {"Node", nodeId},
 339                         {"Name", pktName},
 340                         {"Size", info.Size},
 341                 }, func(les LEs) string {
 342                         return fmt.Sprintf(
 343                                 "Our info: %s/tx/%s (%s)",
 344                                 ctx.NodeName(nodeId),
 345                                 pktName,
 346                                 humanize.IBytes(info.Size),
 347                         )
 348                 })
 349         }
 350         if totalSize > 0 {
 351                 ctx.LogI("sp-infos-tx", LEs{
 352                         {"XX", string(TTx)},
 353                         {"Node", nodeId},
 354                         {"Pkts", len(payloads)},
 355                         {"Size", totalSize},
 356                 }, func(les LEs) string {
 357                         return fmt.Sprintf(
 358                                 "We have got for %s: %d packets, %s",
 359                                 ctx.NodeName(nodeId),
 360                                 len(payloads),
 361                                 humanize.IBytes(uint64(totalSize)),
 362                         )
 363                 })
 364         }
 365         return payloadsSplit(payloads)
 366 }
 367
 368 func (state *SPState) StartI(conn ConnDeadlined) error {
 369         nodeId := state.Node.Id
 370         err := state.Ctx.ensureRxDir(nodeId)
 371         if err != nil {
 372                 return err
 373         }
 374         var rxLock *os.File
 375         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TRx) {
 376                 rxLock, err = state.Ctx.LockDir(nodeId, string(TRx))
 377                 if err != nil {
 378                         return err
 379                 }
 380         }
 381         var txLock *os.File
 382         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
 383                 txLock, err = state.Ctx.LockDir(nodeId, string(TTx))
 384                 if err != nil {
 385                         return err
 386                 }
 387         }
 388         started := time.Now()
 389         conf := noise.Config{
 390                 CipherSuite: NoiseCipherSuite,
 391                 Pattern:     noise.HandshakeIK,
 392                 Initiator:   true,
 393                 StaticKeypair: noise.DHKey{
 394                         Private: state.Ctx.Self.NoisePrv[:],
 395                         Public:  state.Ctx.Self.NoisePub[:],
 396                 },
 397                 PeerStatic: state.Node.NoisePub[:],
 398         }
 399         hs, err := noise.NewHandshakeState(conf)
 400         if err != nil {
 401                 return err
 402         }
 403         state.hs = hs
 404         state.payloads = make(chan []byte)
 405         state.pings = make(chan struct{})
 406         state.infosTheir = make(map[[MTHSize]byte]*SPInfo)
 407         state.infosOurSeen = make(map[[MTHSize]byte]uint8)
 408         state.progressBars = make(map[string]struct{})
 409         state.started = started
 410         state.rxLock = rxLock
 411         state.txLock = txLock
 412
 413         var infosPayloads [][]byte
 414         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
 415                 infosPayloads = state.Ctx.infosOur(nodeId, state.Nice, &state.infosOurSeen)
 416         }
 417         var firstPayload []byte
 418         if len(infosPayloads) > 0 {
 419                 firstPayload = infosPayloads[0]
 420         }
 421         // Pad first payload, to hide actual number of existing files
 422         for i := 0; i < (MaxSPSize-len(firstPayload))/SPHeadOverhead; i++ {
 423                 firstPayload = append(firstPayload, SPHaltMarshalized...)
 424         }
 425
 426         var buf []byte
 427         var payload []byte
 428         buf, _, _, err = state.hs.WriteMessage(nil, firstPayload)
 429         if err != nil {
 430                 state.dirUnlock()
 431                 return err
 432         }
 433         les := LEs{{"Node", nodeId}, {"Nice", int(state.Nice)}}
 434         state.Ctx.LogD("sp-startI", les, func(les LEs) string {
 435                 return fmt.Sprintf(
 436                         "SP with %s (nice %s): sending first message",
 437                         state.Node.Name,
 438                         NicenessFmt(state.Nice),
 439                 )
 440         })
 441         conn.SetWriteDeadline(time.Now().Add(DefaultDeadline)) // #nosec G104
 442         if err = state.WriteSP(conn, buf, false); err != nil {
 443                 state.Ctx.LogE("sp-startI", les, err, func(les LEs) string {
 444                         return fmt.Sprintf(
 445                                 "SP with %s (nice %s): writing",
 446                                 state.Node.Name,
 447                                 NicenessFmt(state.Nice),
 448                         )
 449                 })
 450                 state.dirUnlock()
 451                 return err
 452         }
 453         state.Ctx.LogD("sp-startI-wait", les, func(les LEs) string {
 454                 return fmt.Sprintf(
 455                         "SP with %s (nice %s): waiting for first message",
 456                         state.Node.Name,
 457                         NicenessFmt(state.Nice),
 458                 )
 459         })
 460         conn.SetReadDeadline(time.Now().Add(DefaultDeadline)) // #nosec G104
 461         if buf, err = state.ReadSP(conn); err != nil {
 462                 state.Ctx.LogE("sp-startI-read", les, err, func(les LEs) string {
 463                         return fmt.Sprintf(
 464                                 "SP with %s (nice %s): reading",
 465                                 state.Node.Name,
 466                                 NicenessFmt(state.Nice),
 467                         )
 468                 })
 469                 state.dirUnlock()
 470                 return err
 471         }
 472         payload, state.csOur, state.csTheir, err = state.hs.ReadMessage(nil, buf)
 473         if err != nil {
 474                 state.Ctx.LogE("sp-startI-read", les, err, func(les LEs) string {
 475                         return fmt.Sprintf(
 476                                 "SP with %s (nice %s): reading Noise message",
 477                                 state.Node.Name,
 478                                 NicenessFmt(state.Nice),
 479                         )
 480                 })
 481                 state.dirUnlock()
 482                 return err
 483         }
 484         state.Ctx.LogD("sp-startI-workers", les, func(les LEs) string {
 485                 return fmt.Sprintf(
 486                         "SP with %s (nice %s): starting workers",
 487                         state.Node.Name,
 488                         NicenessFmt(state.Nice),
 489                 )
 490         })
 491         err = state.StartWorkers(conn, infosPayloads, payload)
 492         if err != nil {
 493                 state.Ctx.LogE("sp-startI-workers", les, err, func(les LEs) string {
 494                         return fmt.Sprintf(
 495                                 "SP with %s (nice %s): starting workers",
 496                                 state.Node.Name,
 497                                 NicenessFmt(state.Nice),
 498                         )
 499                 })
 500                 state.dirUnlock()
 501         }
 502         return err
 503 }
 504
 505 func (state *SPState) StartR(conn ConnDeadlined) error {
 506         started := time.Now()
 507         conf := noise.Config{
 508                 CipherSuite: NoiseCipherSuite,
 509                 Pattern:     noise.HandshakeIK,
 510                 Initiator:   false,
 511                 StaticKeypair: noise.DHKey{
 512                         Private: state.Ctx.Self.NoisePrv[:],
 513                         Public:  state.Ctx.Self.NoisePub[:],
 514                 },
 515         }
 516         hs, err := noise.NewHandshakeState(conf)
 517         if err != nil {
 518                 return err
 519         }
 520         xxOnly := TRxTx("")
 521         state.hs = hs
 522         state.payloads = make(chan []byte)
 523         state.pings = make(chan struct{})
 524         state.infosOurSeen = make(map[[MTHSize]byte]uint8)
 525         state.infosTheir = make(map[[MTHSize]byte]*SPInfo)
 526         state.progressBars = make(map[string]struct{})
 527         state.started = started
 528         state.xxOnly = xxOnly
 529
 530         var buf []byte
 531         var payload []byte
 532         logMsg := func(les LEs) string {
 533                 return fmt.Sprintf(
 534                         "SP nice %s: waiting for first message",
 535                         NicenessFmt(state.Nice),
 536                 )
 537         }
 538         les := LEs{{"Nice", int(state.Nice)}}
 539         state.Ctx.LogD("sp-startR", les, logMsg)
 540         conn.SetReadDeadline(time.Now().Add(DefaultDeadline)) // #nosec G104
 541         if buf, err = state.ReadSP(conn); err != nil {
 542                 state.Ctx.LogE("sp-startR-read", les, err, logMsg)
 543                 return err
 544         }
 545         if payload, _, _, err = state.hs.ReadMessage(nil, buf); err != nil {
 546                 state.Ctx.LogE("sp-startR-read", les, err, logMsg)
 547                 return err
 548         }
 549
 550         var node *Node
 551         for _, n := range state.Ctx.Neigh {
 552                 if subtle.ConstantTimeCompare(state.hs.PeerStatic(), n.NoisePub[:]) == 1 {
 553                         node = n
 554                         break
 555                 }
 556         }
 557         if node == nil {
 558                 peerId := Base32Codec.EncodeToString(state.hs.PeerStatic())
 559                 err = errors.New("unknown peer: " + peerId)
 560                 state.Ctx.LogE("sp-startR-unknown", append(les, LE{"Peer", peerId}), err, logMsg)
 561                 return err
 562         }
 563         state.Node = node
 564         state.rxRate = node.RxRate
 565         state.txRate = node.TxRate
 566         state.onlineDeadline = node.OnlineDeadline
 567         state.maxOnlineTime = node.MaxOnlineTime
 568         les = LEs{{"Node", node.Id}, {"Nice", int(state.Nice)}}
 569
 570         if err = state.Ctx.ensureRxDir(node.Id); err != nil {
 571                 return err
 572         }
 573         var rxLock *os.File
 574         if xxOnly == "" || xxOnly == TRx {
 575                 rxLock, err = state.Ctx.LockDir(node.Id, string(TRx))
 576                 if err != nil {
 577                         return err
 578                 }
 579         }
 580         state.rxLock = rxLock
 581         var txLock *os.File
 582         if xxOnly == "" || xxOnly == TTx {
 583                 txLock, err = state.Ctx.LockDir(node.Id, string(TTx))
 584                 if err != nil {
 585                         return err
 586                 }
 587         }
 588         state.txLock = txLock
 589
 590         var infosPayloads [][]byte
 591         if xxOnly == "" || xxOnly == TTx {
 592                 infosPayloads = state.Ctx.infosOur(node.Id, state.Nice, &state.infosOurSeen)
 593         }
 594         var firstPayload []byte
 595         if len(infosPayloads) > 0 {
 596                 firstPayload = infosPayloads[0]
 597         }
 598         // Pad first payload, to hide actual number of existing files
 599         for i := 0; i < (MaxSPSize-len(firstPayload))/SPHeadOverhead; i++ {
 600                 firstPayload = append(firstPayload, SPHaltMarshalized...)
 601         }
 602
 603         state.Ctx.LogD("sp-startR-write", les, func(les LEs) string {
 604                 return fmt.Sprintf(
 605                         "SP with %s (nice %s): sending first message",
 606                         node.Name, NicenessFmt(state.Nice),
 607                 )
 608         })
 609         buf, state.csTheir, state.csOur, err = state.hs.WriteMessage(nil, firstPayload)
 610         if err != nil {
 611                 state.dirUnlock()
 612                 return err
 613         }
 614         conn.SetWriteDeadline(time.Now().Add(DefaultDeadline)) // #nosec G104
 615         if err = state.WriteSP(conn, buf, false); err != nil {
 616                 state.Ctx.LogE("sp-startR-write", les, err, func(les LEs) string {
 617                         return fmt.Sprintf(
 618                                 "SP with %s (nice %s): writing",
 619                                 node.Name, NicenessFmt(state.Nice),
 620                         )
 621                 })
 622                 state.dirUnlock()
 623                 return err
 624         }
 625         state.Ctx.LogD("sp-startR-workers", les, func(les LEs) string {
 626                 return fmt.Sprintf(
 627                         "SP with %s (nice %s): starting workers",
 628                         node.Name, NicenessFmt(state.Nice),
 629                 )
 630         })
 631         err = state.StartWorkers(conn, infosPayloads, payload)
 632         if err != nil {
 633                 state.dirUnlock()
 634         }
 635         return err
 636 }
 637
 638 func (state *SPState) closeFd(pth string) {
 639         state.fdsLock.Lock()
 640         if s, exists := state.fds[pth]; exists {
 641                 delete(state.fds, pth)
 642                 s.fd.Close()
 643         }
 644         state.fdsLock.Unlock()
 645 }
 646
 647 func (state *SPState) StartWorkers(
 648         conn ConnDeadlined,
 649         infosPayloads [][]byte,
 650         payload []byte,
 651 ) error {
 652         les := LEs{{"Node", state.Node.Id}, {"Nice", int(state.Nice)}}
 653         state.fds = make(map[string]FdAndFullSize)
 654         state.fileHashers = make(map[string]*MTHAndOffset)
 655         state.isDead = make(chan struct{})
 656         if state.maxOnlineTime > 0 {
 657                 state.mustFinishAt = state.started.Add(state.maxOnlineTime)
 658         }
 659         if !state.NoCK {
 660                 spCheckerOnce.Do(func() { go SPChecker(state.Ctx) })
 661                 go func() {
 662                         for job := range state.Ctx.JobsNoCK(state.Node.Id) {
 663                                 if job.PktEnc.Nice <= state.Nice {
 664                                         spCheckerTasks <- SPCheckerTask{
 665                                                 nodeId: state.Node.Id,
 666                                                 hsh:    job.HshValue,
 667                                                 done:   state.payloads,
 668                                         }
 669                                 }
 670                         }
 671                 }()
 672         }
 673
 674         // Remaining handshake payload sending
 675         if len(infosPayloads) > 1 {
 676                 state.wg.Add(1)
 677                 go func() {
 678                         for _, payload := range infosPayloads[1:] {
 679                                 state.Ctx.LogD(
 680                                         "sp-queue-remaining",
 681                                         append(les, LE{"Size", int64(len(payload))}),
 682                                         func(les LEs) string {
 683                                                 return fmt.Sprintf(
 684                                                         "SP with %s (nice %s): queuing remaining payload (%s)",
 685                                                         state.Node.Name, NicenessFmt(state.Nice),
 686                                                         humanize.IBytes(uint64(len(payload))),
 687                                                 )
 688                                         },
 689                                 )
 690                                 state.payloads <- payload
 691                         }
 692                         state.wg.Done()
 693                 }()
 694         }
 695
 696         // Processing of first payload and queueing its responses
 697         logMsg := func(les LEs) string {
 698                 return fmt.Sprintf(
 699                         "SP with %s (nice %s): processing first payload (%s)",
 700                         state.Node.Name, NicenessFmt(state.Nice),
 701                         humanize.IBytes(uint64(len(payload))),
 702                 )
 703         }
 704         state.Ctx.LogD("sp-process", append(les, LE{"Size", int64(len(payload))}), logMsg)
 705         replies, err := state.ProcessSP(payload)
 706         if err != nil {
 707                 state.Ctx.LogE("sp-process", les, err, logMsg)
 708                 return err
 709         }
 710         state.wg.Add(1)
 711         go func() {
 712                 for _, reply := range replies {
 713                         state.Ctx.LogD(
 714                                 "sp-queue-reply",
 715                                 append(les, LE{"Size", int64(len(reply))}),
 716                                 func(les LEs) string {
 717                                         return fmt.Sprintf(
 718                                                 "SP with %s (nice %s): queuing reply (%s)",
 719                                                 state.Node.Name, NicenessFmt(state.Nice),
 720                                                 humanize.IBytes(uint64(len(payload))),
 721                                         )
 722                                 },
 723                         )
 724                         state.payloads <- reply
 725                 }
 726                 state.wg.Done()
 727         }()
 728
 729         // Periodic jobs
 730         state.wg.Add(1)
 731         go func() {
 732                 deadlineTicker := time.NewTicker(time.Second)
 733                 pingTicker := time.NewTicker(PingTimeout)
 734                 for {
 735                         select {
 736                         case <-state.isDead:
 737                                 state.wg.Done()
 738                                 deadlineTicker.Stop()
 739                                 pingTicker.Stop()
 740                                 return
 741                         case now := <-deadlineTicker.C:
 742                                 if now.Sub(state.RxLastNonPing) >= state.onlineDeadline &&
 743                                         now.Sub(state.TxLastNonPing) >= state.onlineDeadline {
 744                                         goto Deadlined
 745                                 }
 746                                 if state.maxOnlineTime > 0 && state.mustFinishAt.Before(now) {
 747                                         goto Deadlined
 748                                 }
 749                                 if now.Sub(state.RxLastSeen) >= 2*PingTimeout {
 750                                         goto Deadlined
 751                                 }
 752                                 break
 753                         Deadlined:
 754                                 state.SetDead()
 755                                 conn.Close() // #nosec G104
 756                         case now := <-pingTicker.C:
 757                                 if now.After(state.TxLastSeen.Add(PingTimeout)) {
 758                                         state.wg.Add(1)
 759                                         go func() {
 760                                                 state.pings <- struct{}{}
 761                                                 state.wg.Done()
 762                                         }()
 763                                 }
 764                         }
 765                 }
 766         }()
 767
 768         // Spool checker and INFOs sender of appearing files
 769         if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
 770                 state.wg.Add(1)
 771                 go func() {
 772                         ticker := time.NewTicker(time.Second)
 773                         for {
 774                                 select {
 775                                 case <-state.isDead:
 776                                         state.wg.Done()
 777                                         ticker.Stop()
 778                                         return
 779                                 case <-ticker.C:
 780                                         for _, payload := range state.Ctx.infosOur(
 781                                                 state.Node.Id,
 782                                                 state.Nice,
 783                                                 &state.infosOurSeen,
 784                                         ) {
 785                                                 state.Ctx.LogD(
 786                                                         "sp-queue-info",
 787                                                         append(les, LE{"Size", int64(len(payload))}),
 788                                                         func(les LEs) string {
 789                                                                 return fmt.Sprintf(
 790                                                                         "SP with %s (nice %s): queuing new info (%s)",
 791                                                                         state.Node.Name, NicenessFmt(state.Nice),
 792                                                                         humanize.IBytes(uint64(len(payload))),
 793                                                                 )
 794                                                         },
 795                                                 )
 796                                                 state.payloads <- payload
 797                                         }
 798                                 }
 799                         }
 800                 }()
 801         }
 802
 803         // Sender
 804         state.wg.Add(1)
 805         go func() {
 806                 defer conn.Close()
 807                 defer state.SetDead()
 808                 defer state.wg.Done()
 809                 buf := make([]byte, MaxSPSize-SPHeadOverhead-SPFileOverhead)
 810                 for {
 811                         if state.NotAlive() {
 812                                 return
 813                         }
 814                         var payload []byte
 815                         var ping bool
 816                         select {
 817                         case <-state.pings:
 818                                 state.Ctx.LogD("sp-got-ping", les, func(les LEs) string {
 819                                         return fmt.Sprintf(
 820                                                 "SP with %s (nice %s): got ping",
 821                                                 state.Node.Name, NicenessFmt(state.Nice),
 822                                         )
 823                                 })
 824                                 payload = SPPingMarshalized
 825                                 ping = true
 826                         case payload = <-state.payloads:
 827                                 state.Ctx.LogD(
 828                                         "sp-got-payload",
 829                                         append(les, LE{"Size", int64(len(payload))}),
 830                                         func(les LEs) string {
 831                                                 return fmt.Sprintf(
 832                                                         "SP with %s (nice %s): got payload (%s)",
 833                                                         state.Node.Name, NicenessFmt(state.Nice),
 834                                                         humanize.IBytes(uint64(len(payload))),
 835                                                 )
 836                                         },
 837                                 )
 838                         default:
 839                                 state.RLock()
 840                                 if len(state.queueTheir) == 0 {
 841                                         state.RUnlock()
 842                                         time.Sleep(100 * time.Millisecond)
 843                                         continue
 844                                 }
 845                                 freq := state.queueTheir[0].freq
 846                                 state.RUnlock()
 847                                 if state.txRate > 0 {
 848                                         time.Sleep(time.Second / time.Duration(state.txRate))
 849                                 }
 850                                 pktName := Base32Codec.EncodeToString(freq.Hash[:])
 851                                 lesp := append(
 852                                         les,
 853                                         LE{"XX", string(TTx)},
 854                                         LE{"Pkt", pktName},
 855                                         LE{"Size", int64(freq.Offset)},
 856                                 )
 857                                 logMsg := func(les LEs) string {
 858                                         return fmt.Sprintf(
 859                                                 "SP with %s (nice %s): tx/%s (%s)",
 860                                                 state.Node.Name, NicenessFmt(state.Nice),
 861                                                 pktName,
 862                                                 humanize.IBytes(freq.Offset),
 863                                         )
 864                                 }
 865                                 state.Ctx.LogD("sp-queue", lesp, func(les LEs) string {
 866                                         return logMsg(les) + ": queueing"
 867                                 })
 868                                 pth := filepath.Join(
 869                                         state.Ctx.Spool,
 870                                         state.Node.Id.String(),
 871                                         string(TTx),
 872                                         Base32Codec.EncodeToString(freq.Hash[:]),
 873                                 )
 874                                 state.fdsLock.RLock()
 875                                 fdAndFullSize, exists := state.fds[pth]
 876                                 state.fdsLock.RUnlock()
 877                                 if !exists {
 878                                         state.Ctx.LogD("sp-queue-open", lesp, func(les LEs) string {
 879                                                 return logMsg(les) + ": opening"
 880                                         })
 881                                         fd, err := os.Open(pth)
 882                                         if err != nil {
 883                                                 state.Ctx.LogE("sp-queue-open", lesp, err, func(les LEs) string {
 884                                                         return logMsg(les) + ": opening"
 885                                                 })
 886                                                 return
 887                                         }
 888                                         fi, err := fd.Stat()
 889                                         if err != nil {
 890                                                 state.Ctx.LogE("sp-queue-stat", lesp, err, func(les LEs) string {
 891                                                         return logMsg(les) + ": stating"
 892                                                 })
 893                                                 return
 894                                         }
 895                                         fdAndFullSize = FdAndFullSize{fd: fd, fullSize: fi.Size()}
 896                                         state.fdsLock.Lock()
 897                                         state.fds[pth] = fdAndFullSize
 898                                         state.fdsLock.Unlock()
 899                                 }
 900                                 fd := fdAndFullSize.fd
 901                                 fullSize := fdAndFullSize.fullSize
 902                                 lesp = append(lesp, LE{"FullSize", fullSize})
 903                                 var bufRead []byte
 904                                 if freq.Offset < uint64(fullSize) {
 905                                         state.Ctx.LogD("sp-file-seek", lesp, func(les LEs) string {
 906                                                 return logMsg(les) + ": seeking"
 907                                         })
 908                                         if _, err = fd.Seek(int64(freq.Offset), io.SeekStart); err != nil {
 909                                                 state.Ctx.LogE("sp-file-seek", lesp, err, func(les LEs) string {
 910                                                         return logMsg(les) + ": seeking"
 911                                                 })
 912                                                 return
 913                                         }
 914                                         n, err := fd.Read(buf)
 915                                         if err != nil {
 916                                                 state.Ctx.LogE("sp-file-read", lesp, err, func(les LEs) string {
 917                                                         return logMsg(les) + ": reading"
 918                                                 })
 919                                                 return
 920                                         }
 921                                         bufRead = buf[:n]
 922                                         lesp = append(
 923                                                 les,
 924                                                 LE{"XX", string(TTx)},
 925                                                 LE{"Pkt", pktName},
 926                                                 LE{"Size", int64(n)},
 927                                                 LE{"FullSize", fullSize},
 928                                         )
 929                                         state.Ctx.LogD("sp-file-read", lesp, func(les LEs) string {
 930                                                 return fmt.Sprintf(
 931                                                         "%s: read %s",
 932                                                         logMsg(les), humanize.IBytes(uint64(n)),
 933                                                 )
 934                                         })
 935                                 } else {
 936                                         state.closeFd(pth)
 937                                 }
 938                                 payload = MarshalSP(SPTypeFile, SPFile{
 939                                         Hash:    freq.Hash,
 940                                         Offset:  freq.Offset,
 941                                         Payload: bufRead,
 942                                 })
 943                                 ourSize := freq.Offset + uint64(len(bufRead))
 944                                 lesp = append(
 945                                         les,
 946                                         LE{"XX", string(TTx)},
 947                                         LE{"Pkt", pktName},
 948                                         LE{"Size", int64(ourSize)},
 949                                         LE{"FullSize", fullSize},
 950                                 )
 951                                 if state.Ctx.ShowPrgrs {
 952                                         state.progressBars[pktName] = struct{}{}
 953                                         Progress("Tx", lesp)
 954                                 }
 955                                 state.Lock()
 956                                 for i, q := range state.queueTheir {
 957                                         if *q.freq.Hash != *freq.Hash {
 958                                                 continue
 959                                         }
 960                                         if ourSize == uint64(fullSize) {
 961                                                 state.Ctx.LogD("sp-file-finished", lesp, func(les LEs) string {
 962                                                         return logMsg(les) + ": finished"
 963                                                 })
 964                                                 state.queueTheir = append(
 965                                                         state.queueTheir[:i],
 966                                                         state.queueTheir[i+1:]...,
 967                                                 )
 968                                                 if state.Ctx.ShowPrgrs {
 969                                                         delete(state.progressBars, pktName)
 970                                                 }
 971                                         } else {
 972                                                 q.freq.Offset = ourSize
 973                                         }
 974                                         break
 975                                 }
 976                                 state.Unlock()
 977                         }
 978                         logMsg := func(les LEs) string {
 979                                 return fmt.Sprintf(
 980                                         "SP with %s (nice %s): sending %s",
 981                                         state.Node.Name, NicenessFmt(state.Nice),
 982                                         humanize.IBytes(uint64(len(payload))),
 983                                 )
 984                         }
 985                         state.Ctx.LogD("sp-sending", append(les, LE{"Size", int64(len(payload))}), logMsg)
 986                         conn.SetWriteDeadline(time.Now().Add(DefaultDeadline)) // #nosec G104
 987                         ct, err := state.csOur.Encrypt(nil, nil, payload)
 988                         if err != nil {
 989                                 state.Ctx.LogE("sp-encrypting", les, err, logMsg)
 990                                 return
 991                         }
 992                         if err := state.WriteSP(conn, ct, ping); err != nil {
 993                                 state.Ctx.LogE("sp-sending", les, err, logMsg)
 994                                 return
 995                         }
 996                 }
 997         }()
 998
 999         // Receiver
1000         state.wg.Add(1)
1001         go func() {
1002                 for {
1003                         if state.NotAlive() {
1004                                 break
1005                         }
1006                         logMsg := func(les LEs) string {
1007                                 return fmt.Sprintf(
1008                                         "SP with %s (nice %s): waiting for payload",
1009                                         state.Node.Name, NicenessFmt(state.Nice),
1010                                 )
1011                         }
1012                         state.Ctx.LogD("sp-recv-wait", les, logMsg)
1013                         conn.SetReadDeadline(time.Now().Add(DefaultDeadline)) // #nosec G104
1014                         payload, err := state.ReadSP(conn)
1015                         if err != nil {
1016                                 if err == io.EOF {
1017                                         break
1018                                 }
1019                                 unmarshalErr := err.(*xdr.UnmarshalError)
1020                                 if os.IsTimeout(unmarshalErr.Err) {
1021                                         continue
1022                                 }
1023                                 if unmarshalErr.ErrorCode == xdr.ErrIO {
1024                                         break
1025                                 }
1026                                 state.Ctx.LogE("sp-recv-wait", les, err, logMsg)
1027                                 break
1028                         }
1029                         logMsg = func(les LEs) string {
1030                                 return fmt.Sprintf(
1031                                         "SP with %s (nice %s): payload (%s)",
1032                                         state.Node.Name, NicenessFmt(state.Nice),
1033                                         humanize.IBytes(uint64(len(payload))),
1034                                 )
1035                         }
1036                         state.Ctx.LogD(
1037                                 "sp-recv-got",
1038                                 append(les, LE{"Size", int64(len(payload))}),
1039                                 func(les LEs) string { return logMsg(les) + ": got" },
1040                         )
1041                         payload, err = state.csTheir.Decrypt(nil, nil, payload)
1042                         if err != nil {
1043                                 state.Ctx.LogE("sp-recv-got", les, err, func(les LEs) string {
1044                                         return logMsg(les) + ": got"
1045                                 })
1046                                 break
1047                         }
1048                         state.Ctx.LogD(
1049                                 "sp-recv-process",
1050                                 append(les, LE{"Size", int64(len(payload))}),
1051                                 func(les LEs) string {
1052                                         return logMsg(les) + ": processing"
1053                                 },
1054                         )
1055                         replies, err := state.ProcessSP(payload)
1056                         if err != nil {
1057                                 state.Ctx.LogE("sp-recv-process", les, err, func(les LEs) string {
1058                                         return logMsg(les) + ": processing"
1059                                 })
1060                                 break
1061                         }
1062                         state.wg.Add(1)
1063                         go func() {
1064                                 for _, reply := range replies {
1065                                         state.Ctx.LogD(
1066                                                 "sp-recv-reply",
1067                                                 append(les[:len(les)-1], LE{"Size", int64(len(reply))}),
1068                                                 func(les LEs) string {
1069                                                         return fmt.Sprintf(
1070                                                                 "SP with %s (nice %s): queuing reply (%s)",
1071                                                                 state.Node.Name, NicenessFmt(state.Nice),
1072                                                                 humanize.IBytes(uint64(len(reply))),
1073                                                         )
1074                                                 },
1075                                         )
1076                                         state.payloads <- reply
1077                                 }
1078                                 state.wg.Done()
1079                         }()
1080                         if state.rxRate > 0 {
1081                                 time.Sleep(time.Second / time.Duration(state.rxRate))
1082                         }
1083                 }
1084                 state.SetDead()
1085                 state.wg.Done()
1086                 state.SetDead()
1087                 conn.Close() // #nosec G104
1088         }()
1089
1090         return nil
1091 }
1092
1093 func (state *SPState) Wait() {
1094         state.wg.Wait()
1095         close(state.payloads)
1096         close(state.pings)
1097         state.Duration = time.Now().Sub(state.started)
1098         state.dirUnlock()
1099         state.RxSpeed = state.RxBytes
1100         state.TxSpeed = state.TxBytes
1101         rxDuration := int64(state.RxLastSeen.Sub(state.started).Seconds())
1102         txDuration := int64(state.TxLastSeen.Sub(state.started).Seconds())
1103         if rxDuration > 0 {
1104                 state.RxSpeed = state.RxBytes / rxDuration
1105         }
1106         if txDuration > 0 {
1107                 state.TxSpeed = state.TxBytes / txDuration
1108         }
1109         for _, s := range state.fds {
1110                 s.fd.Close()
1111         }
1112         for pktName := range state.progressBars {
1113                 ProgressKill(pktName)
1114         }
1115 }
1116
1117 func (state *SPState) ProcessSP(payload []byte) ([][]byte, error) {
1118         les := LEs{{"Node", state.Node.Id}, {"Nice", int(state.Nice)}}
1119         r := bytes.NewReader(payload)
1120         var err error
1121         var replies [][]byte
1122         var infosGot bool
1123         for r.Len() > 0 {
1124                 state.Ctx.LogD("sp-process-unmarshal", les, func(les LEs) string {
1125                         return fmt.Sprintf(
1126                                 "SP with %s (nice %s): unmarshaling header",
1127                                 state.Node.Name, NicenessFmt(state.Nice),
1128                         )
1129                 })
1130                 var head SPHead
1131                 if _, err = xdr.Unmarshal(r, &head); err != nil {
1132                         state.Ctx.LogE("sp-process-unmarshal", les, err, func(les LEs) string {
1133                                 return fmt.Sprintf(
1134                                         "SP with %s (nice %s): unmarshaling header",
1135                                         state.Node.Name, NicenessFmt(state.Nice),
1136                                 )
1137                         })
1138                         return nil, err
1139                 }
1140                 if head.Type != SPTypePing {
1141                         state.RxLastNonPing = state.RxLastSeen
1142                 }
1143                 switch head.Type {
1144                 case SPTypeHalt:
1145                         state.Ctx.LogD(
1146                                 "sp-process-halt",
1147                                 append(les, LE{"Type", "halt"}), func(les LEs) string {
1148                                         return fmt.Sprintf(
1149                                                 "SP with %s (nice %s): got HALT",
1150                                                 state.Node.Name, NicenessFmt(state.Nice),
1151                                         )
1152                                 },
1153                         )
1154                         state.Lock()
1155                         state.queueTheir = nil
1156                         state.Unlock()
1157
1158                 case SPTypePing:
1159                         state.Ctx.LogD(
1160                                 "sp-process-ping",
1161                                 append(les, LE{"Type", "ping"}),
1162                                 func(les LEs) string {
1163                                         return fmt.Sprintf(
1164                                                 "SP with %s (nice %s): got PING",
1165                                                 state.Node.Name, NicenessFmt(state.Nice),
1166                                         )
1167                                 },
1168                         )
1169
1170                 case SPTypeInfo:
1171                         infosGot = true
1172                         lesp := append(les, LE{"Type", "info"})
1173                         state.Ctx.LogD(
1174                                 "sp-process-info-unmarshal", lesp,
1175                                 func(les LEs) string {
1176                                         return fmt.Sprintf(
1177                                                 "SP with %s (nice %s): unmarshaling INFO",
1178                                                 state.Node.Name, NicenessFmt(state.Nice),
1179                                         )
1180                                 },
1181                         )
1182                         var info SPInfo
1183                         if _, err = xdr.Unmarshal(r, &info); err != nil {
1184                                 state.Ctx.LogE(
1185                                         "sp-process-info-unmarshal", lesp, err,
1186                                         func(les LEs) string {
1187                                                 return fmt.Sprintf(
1188                                                         "SP with %s (nice %s): unmarshaling INFO",
1189                                                         state.Node.Name, NicenessFmt(state.Nice),
1190                                                 )
1191                                         },
1192                                 )
1193                                 return nil, err
1194                         }
1195                         pktName := Base32Codec.EncodeToString(info.Hash[:])
1196                         lesp = append(
1197                                 lesp,
1198                                 LE{"Pkt", pktName},
1199                                 LE{"Size", int64(info.Size)},
1200                                 LE{"PktNice", int(info.Nice)},
1201                         )
1202                         logMsg := func(les LEs) string {
1203                                 return fmt.Sprintf(
1204                                         "SP with %s (nice %s): INFO %s (%s) nice %s",
1205                                         state.Node.Name, NicenessFmt(state.Nice),
1206                                         pktName,
1207                                         humanize.IBytes(info.Size),
1208                                         NicenessFmt(info.Nice),
1209                                 )
1210                         }
1211                         if !state.listOnly && info.Nice > state.Nice {
1212                                 state.Ctx.LogD("sp-process-info-too-nice", lesp, func(les LEs) string {
1213                                         return logMsg(les) + ": too nice"
1214                                 })
1215                                 continue
1216                         }
1217                         state.Ctx.LogD("sp-process-info-got", lesp, func(les LEs) string {
1218                                 return logMsg(les) + ": received"
1219                         })
1220                         if !state.listOnly && state.xxOnly == TTx {
1221                                 continue
1222                         }
1223                         state.Lock()
1224                         state.infosTheir[*info.Hash] = &info
1225                         state.Unlock()
1226                         state.Ctx.LogD("sp-process-info-stat", lesp, func(les LEs) string {
1227                                 return logMsg(les) + ": stating part"
1228                         })
1229                         pktPath := filepath.Join(
1230                                 state.Ctx.Spool,
1231                                 state.Node.Id.String(),
1232                                 string(TRx),
1233                                 Base32Codec.EncodeToString(info.Hash[:]),
1234                         )
1235                         logMsg = func(les LEs) string {
1236                                 return fmt.Sprintf(
1237                                         "Packet %s (%s) (nice %s)",
1238                                         pktName,
1239                                         humanize.IBytes(info.Size),
1240                                         NicenessFmt(info.Nice),
1241                                 )
1242                         }
1243                         if _, err = os.Stat(pktPath); err == nil {
1244                                 state.Ctx.LogI("sp-info-done", lesp, func(les LEs) string {
1245                                         return logMsg(les) + ": already done"
1246                                 })
1247                                 if !state.listOnly {
1248                                         replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
1249                                 }
1250                                 continue
1251                         }
1252                         if _, err = os.Stat(pktPath + SeenSuffix); err == nil {
1253                                 state.Ctx.LogI("sp-info-seen", lesp, func(les LEs) string {
1254                                         return logMsg(les) + ": already seen"
1255                                 })
1256                                 if !state.listOnly {
1257                                         replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
1258                                 }
1259                                 continue
1260                         }
1261                         if _, err = os.Stat(pktPath + NoCKSuffix); err == nil {
1262                                 state.Ctx.LogI("sp-info-nock", lesp, func(les LEs) string {
1263                                         return logMsg(les) + ": still not checksummed"
1264                                 })
1265                                 continue
1266                         }
1267                         fi, err := os.Stat(pktPath + PartSuffix)
1268                         var offset int64
1269                         if err == nil {
1270                                 offset = fi.Size()
1271                         }
1272                         if !state.Ctx.IsEnoughSpace(int64(info.Size) - offset) {
1273                                 state.Ctx.LogI("sp-info-no-space", lesp, func(les LEs) string {
1274                                         return logMsg(les) + ": not enough space"
1275                                 })
1276                                 continue
1277                         }
1278                         state.Ctx.LogI(
1279                                 "sp-info",
1280                                 append(lesp, LE{"Offset", offset}),
1281                                 func(les LEs) string {
1282                                         return fmt.Sprintf(
1283                                                 "%s: %d%%", logMsg(les), 100*uint64(offset)/info.Size,
1284                                         )
1285                                 },
1286                         )
1287                         if !state.listOnly && (state.onlyPkts == nil || state.onlyPkts[*info.Hash]) {
1288                                 replies = append(replies, MarshalSP(
1289                                         SPTypeFreq,
1290                                         SPFreq{info.Hash, uint64(offset)},
1291                                 ))
1292                         }
1293
1294                 case SPTypeFile:
1295                         lesp := append(les, LE{"Type", "file"})
1296                         state.Ctx.LogD("sp-process-file", lesp, func(les LEs) string {
1297                                 return fmt.Sprintf(
1298                                         "SP with %s (nice %s): unmarshaling FILE",
1299                                         state.Node.Name, NicenessFmt(state.Nice),
1300                                 )
1301                         })
1302                         var file SPFile
1303                         if _, err = xdr.Unmarshal(r, &file); err != nil {
1304                                 state.Ctx.LogE("sp-process-file", lesp, err, func(les LEs) string {
1305                                         return fmt.Sprintf(
1306                                                 "SP with %s (nice %s): unmarshaling FILE",
1307                                                 state.Node.Name, NicenessFmt(state.Nice),
1308                                         )
1309                                 })
1310                                 return nil, err
1311                         }
1312                         pktName := Base32Codec.EncodeToString(file.Hash[:])
1313                         lesp = append(
1314                                 lesp,
1315                                 LE{"XX", string(TRx)},
1316                                 LE{"Pkt", pktName},
1317                                 LE{"Size", int64(len(file.Payload))},
1318                         )
1319                         logMsg := func(les LEs) string {
1320                                 return fmt.Sprintf(
1321                                         "Got packet %s (%s)",
1322                                         pktName, humanize.IBytes(uint64(len(file.Payload))),
1323                                 )
1324                         }
1325                         fullsize := int64(0)
1326                         state.RLock()
1327                         infoTheir, ok := state.infosTheir[*file.Hash]
1328                         state.RUnlock()
1329                         if !ok {
1330                                 state.Ctx.LogE("sp-file-open", lesp, err, func(les LEs) string {
1331                                         return logMsg(les) + ": unknown file"
1332                                 })
1333                                 continue
1334                         }
1335                         fullsize = int64(infoTheir.Size)
1336                         lesp = append(lesp, LE{"FullSize", fullsize})
1337                         dirToSync := filepath.Join(
1338                                 state.Ctx.Spool,
1339                                 state.Node.Id.String(),
1340                                 string(TRx),
1341                         )
1342                         filePath := filepath.Join(dirToSync, pktName)
1343                         filePathPart := filePath + PartSuffix
1344                         state.Ctx.LogD("sp-file-open", lesp, func(les LEs) string {
1345                                 return logMsg(les) + ": opening part"
1346                         })
1347                         state.fdsLock.RLock()
1348                         fdAndFullSize, exists := state.fds[filePathPart]
1349                         state.fdsLock.RUnlock()
1350                         hasherAndOffset := state.fileHashers[filePath]
1351                         var fd *os.File
1352                         if exists {
1353                                 fd = fdAndFullSize.fd
1354                         } else {
1355                                 fd, err = os.OpenFile(
1356                                         filePathPart,
1357                                         os.O_RDWR|os.O_CREATE,
1358                                         os.FileMode(0666),
1359                                 )
1360                                 if err != nil {
1361                                         state.Ctx.LogE("sp-file-open", lesp, err, func(les LEs) string {
1362                                                 return logMsg(les) + ": opening part"
1363                                         })
1364                                         return nil, err
1365                                 }
1366                                 state.fdsLock.Lock()
1367                                 state.fds[filePathPart] = FdAndFullSize{fd: fd}
1368                                 state.fdsLock.Unlock()
1369                                 if !state.NoCK {
1370                                         hasherAndOffset = &MTHAndOffset{
1371                                                 mth:    MTHNew(fullsize, int64(file.Offset)),
1372                                                 offset: file.Offset,
1373                                         }
1374                                         state.fileHashers[filePath] = hasherAndOffset
1375                                 }
1376                         }
1377                         state.Ctx.LogD(
1378                                 "sp-file-seek",
1379                                 append(lesp, LE{"Offset", file.Offset}),
1380                                 func(les LEs) string {
1381                                         return fmt.Sprintf("%s: seeking %d", logMsg(les), file.Offset)
1382                                 })
1383                         if _, err = fd.Seek(int64(file.Offset), io.SeekStart); err != nil {
1384                                 state.Ctx.LogE("sp-file-seek", lesp, err, func(les LEs) string {
1385                                         return logMsg(les) + ": seeking"
1386                                 })
1387                                 state.closeFd(filePathPart)
1388                                 return nil, err
1389                         }
1390                         state.Ctx.LogD("sp-file-write", lesp, func(les LEs) string {
1391                                 return logMsg(les) + ": writing"
1392                         })
1393                         if _, err = fd.Write(file.Payload); err != nil {
1394                                 state.Ctx.LogE("sp-file-write", lesp, err, func(les LEs) string {
1395                                         return logMsg(les) + ": writing"
1396                                 })
1397                                 state.closeFd(filePathPart)
1398                                 return nil, err
1399                         }
1400                         if hasherAndOffset != nil {
1401                                 if hasherAndOffset.offset == file.Offset {
1402                                         if _, err = hasherAndOffset.mth.Write(file.Payload); err != nil {
1403                                                 panic(err)
1404                                         }
1405                                         hasherAndOffset.offset += uint64(len(file.Payload))
1406                                 } else {
1407                                         state.Ctx.LogE(
1408                                                 "sp-file-offset-differs", lesp, errors.New("offset differs"),
1409                                                 func(les LEs) string {
1410                                                         return logMsg(les) + ": deleting hasher"
1411                                                 },
1412                                         )
1413                                         delete(state.fileHashers, filePath)
1414                                         hasherAndOffset = nil
1415                                 }
1416                         }
1417                         ourSize := int64(file.Offset + uint64(len(file.Payload)))
1418                         lesp[len(lesp)-2].V = ourSize
1419                         if state.Ctx.ShowPrgrs {
1420                                 state.progressBars[pktName] = struct{}{}
1421                                 Progress("Rx", lesp)
1422                         }
1423                         if fullsize != ourSize {
1424                                 continue
1425                         }
1426                         if state.Ctx.ShowPrgrs {
1427                                 delete(state.progressBars, pktName)
1428                         }
1429                         logMsg = func(les LEs) string {
1430                                 return fmt.Sprintf(
1431                                         "Got packet %s %d%% (%s / %s)",
1432                                         pktName, 100*ourSize/fullsize,
1433                                         humanize.IBytes(uint64(ourSize)),
1434                                         humanize.IBytes(uint64(fullsize)),
1435                                 )
1436                         }
1437                         err = fd.Sync()
1438                         if err != nil {
1439                                 state.Ctx.LogE("sp-file-sync", lesp, err, func(les LEs) string {
1440                                         return logMsg(les) + ": syncing"
1441                                 })
1442                                 state.closeFd(filePathPart)
1443                                 continue
1444                         }
1445                         if hasherAndOffset != nil {
1446                                 delete(state.fileHashers, filePath)
1447                                 if hasherAndOffset.mth.PrependSize() == 0 {
1448                                         if bytes.Compare(hasherAndOffset.mth.Sum(nil), file.Hash[:]) != 0 {
1449                                                 state.Ctx.LogE(
1450                                                         "sp-file-bad-checksum", lesp,
1451                                                         errors.New("checksum mismatch"),
1452                                                         logMsg,
1453                                                 )
1454                                                 state.closeFd(filePathPart)
1455                                                 continue
1456                                         }
1457                                         if err = os.Rename(filePathPart, filePath); err != nil {
1458                                                 state.Ctx.LogE("sp-file-rename", lesp, err, func(les LEs) string {
1459                                                         return logMsg(les) + ": renaming"
1460                                                 })
1461                                                 state.closeFd(filePathPart)
1462                                                 continue
1463                                         }
1464                                         if err = DirSync(dirToSync); err != nil {
1465                                                 state.Ctx.LogE("sp-file-dirsync", lesp, err, func(les LEs) string {
1466                                                         return logMsg(les) + ": dirsyncing"
1467                                                 })
1468                                                 state.closeFd(filePathPart)
1469                                                 continue
1470                                         }
1471                                         state.Ctx.LogI("sp-file-done", lesp, func(les LEs) string {
1472                                                 return logMsg(les) + ": done"
1473                                         })
1474                                         state.wg.Add(1)
1475                                         go func() {
1476                                                 state.payloads <- MarshalSP(SPTypeDone, SPDone{file.Hash})
1477                                                 state.wg.Done()
1478                                         }()
1479                                         state.Lock()
1480                                         delete(state.infosTheir, *file.Hash)
1481                                         state.Unlock()
1482                                         if !state.Ctx.HdrUsage {
1483                                                 continue
1484                                         }
1485                                         if _, err = fd.Seek(0, io.SeekStart); err != nil {
1486                                                 state.Ctx.LogE("sp-file-seek", lesp, err, func(les LEs) string {
1487                                                         return logMsg(les) + ": seeking"
1488                                                 })
1489                                                 state.closeFd(filePathPart)
1490                                                 continue
1491                                         }
1492                                         _, pktEncRaw, err := state.Ctx.HdrRead(fd)
1493                                         state.closeFd(filePathPart)
1494                                         if err != nil {
1495                                                 state.Ctx.LogE("sp-file-hdr-read", lesp, err, func(les LEs) string {
1496                                                         return logMsg(les) + ": HdrReading"
1497                                                 })
1498                                                 continue
1499                                         }
1500                                         state.Ctx.HdrWrite(pktEncRaw, filePath)
1501                                         continue
1502                                 }
1503                         }
1504                         state.closeFd(filePathPart)
1505                         if err = os.Rename(filePathPart, filePath+NoCKSuffix); err != nil {
1506                                 state.Ctx.LogE("sp-file-rename", lesp, err, func(les LEs) string {
1507                                         return logMsg(les) + ": renaming"
1508                                 })
1509                                 continue
1510                         }
1511                         if err = DirSync(dirToSync); err != nil {
1512                                 state.Ctx.LogE("sp-file-dirsync", lesp, err, func(les LEs) string {
1513                                         return logMsg(les) + ": dirsyncing"
1514                                 })
1515                                 continue
1516                         }
1517                         state.Ctx.LogI("sp-file-downloaded", lesp, func(les LEs) string {
1518                                 return logMsg(les) + ": downloaded"
1519                         })
1520                         state.Lock()
1521                         delete(state.infosTheir, *file.Hash)
1522                         state.Unlock()
1523                         go func() {
1524                                 t := SPCheckerTask{
1525                                         nodeId: state.Node.Id,
1526                                         hsh:    file.Hash,
1527                                         done:   state.payloads,
1528                                 }
1529                                 if hasherAndOffset != nil {
1530                                         t.mth = hasherAndOffset.mth
1531                                 }
1532                                 spCheckerTasks <- t
1533                         }()
1534
1535                 case SPTypeDone:
1536                         lesp := append(les, LE{"Type", "done"})
1537                         state.Ctx.LogD("sp-process-done-unmarshal", lesp, func(les LEs) string {
1538                                 return fmt.Sprintf(
1539                                         "SP with %s (nice %s): unmarshaling DONE",
1540                                         state.Node.Name, NicenessFmt(state.Nice),
1541                                 )
1542                         })
1543                         var done SPDone
1544                         if _, err = xdr.Unmarshal(r, &done); err != nil {
1545                                 state.Ctx.LogE("sp-process-done-unmarshal", lesp, err, func(les LEs) string {
1546                                         return fmt.Sprintf(
1547                                                 "SP with %s (nice %s): unmarshaling DONE",
1548                                                 state.Node.Name, NicenessFmt(state.Nice),
1549                                         )
1550                                 })
1551                                 return nil, err
1552                         }
1553                         pktName := Base32Codec.EncodeToString(done.Hash[:])
1554                         lesp = append(lesp, LE{"Pkt", pktName}, LE{"XX", string(TTx)})
1555                         logMsg := func(les LEs) string {
1556                                 return fmt.Sprintf(
1557                                         "SP with %s (nice %s): DONE: removing %s",
1558                                         state.Node.Name, NicenessFmt(state.Nice), pktName,
1559                                 )
1560                         }
1561                         state.Ctx.LogD("sp-done", lesp, logMsg)
1562                         pth := filepath.Join(
1563                                 state.Ctx.Spool,
1564                                 state.Node.Id.String(),
1565                                 string(TTx),
1566                                 pktName,
1567                         )
1568                         if err = os.Remove(pth); err == nil {
1569                                 state.Ctx.LogI("sp-done", lesp, func(les LEs) string {
1570                                         return fmt.Sprintf("Packet %s is sent", pktName)
1571                                 })
1572                                 if state.Ctx.HdrUsage {
1573                                         os.Remove(pth + HdrSuffix)
1574                                 }
1575                         } else {
1576                                 state.Ctx.LogE("sp-done", lesp, err, logMsg)
1577                         }
1578
1579                 case SPTypeFreq:
1580                         lesp := append(les, LE{"Type", "freq"})
1581                         state.Ctx.LogD("sp-process-freq", lesp, func(les LEs) string {
1582                                 return fmt.Sprintf(
1583                                         "SP with %s (nice %s): unmarshaling FREQ",
1584                                         state.Node.Name, NicenessFmt(state.Nice),
1585                                 )
1586                         })
1587                         var freq SPFreq
1588                         if _, err = xdr.Unmarshal(r, &freq); err != nil {
1589                                 state.Ctx.LogE("sp-process-freq", lesp, err, func(les LEs) string {
1590                                         return fmt.Sprintf(
1591                                                 "SP with %s (nice %s): unmarshaling FREQ",
1592                                                 state.Node.Name, NicenessFmt(state.Nice),
1593                                         )
1594                                 })
1595                                 return nil, err
1596                         }
1597                         pktName := Base32Codec.EncodeToString(freq.Hash[:])
1598                         lesp = append(lesp, LE{"Pkt", pktName}, LE{"Offset", freq.Offset})
1599                         state.Ctx.LogD("sp-process-freq-queueing", lesp, func(les LEs) string {
1600                                 return fmt.Sprintf(
1601                                         "SP with %s (nice %s): FREQ %s: queuing",
1602                                         state.Node.Name, NicenessFmt(state.Nice), pktName,
1603                                 )
1604                         })
1605                         nice, exists := state.infosOurSeen[*freq.Hash]
1606                         if exists {
1607                                 if state.onlyPkts == nil || !state.onlyPkts[*freq.Hash] {
1608                                         state.Lock()
1609                                         insertIdx := 0
1610                                         var freqWithNice *FreqWithNice
1611                                         for insertIdx, freqWithNice = range state.queueTheir {
1612                                                 if freqWithNice.nice > nice {
1613                                                         break
1614                                                 }
1615                                         }
1616                                         state.queueTheir = append(state.queueTheir, nil)
1617                                         copy(state.queueTheir[insertIdx+1:], state.queueTheir[insertIdx:])
1618                                         state.queueTheir[insertIdx] = &FreqWithNice{&freq, nice}
1619                                         state.Unlock()
1620                                 } else {
1621                                         state.Ctx.LogD("sp-process-freq-skip", lesp, func(les LEs) string {
1622                                                 return fmt.Sprintf(
1623                                                         "SP with %s (nice %s): FREQ %s: skipping",
1624                                                         state.Node.Name, NicenessFmt(state.Nice), pktName,
1625                                                 )
1626                                         })
1627                                 }
1628                         } else {
1629                                 state.Ctx.LogD("sp-process-freq-unknown", lesp, func(les LEs) string {
1630                                         return fmt.Sprintf(
1631                                                 "SP with %s (nice %s): FREQ %s: unknown",
1632                                                 state.Node.Name, NicenessFmt(state.Nice), pktName,
1633                                         )
1634                                 })
1635                         }
1636
1637                 default:
1638                         state.Ctx.LogE(
1639                                 "sp-process-type-unknown",
1640                                 append(les, LE{"Type", head.Type}),
1641                                 errors.New("unknown type"),
1642                                 func(les LEs) string {
1643                                         return fmt.Sprintf(
1644                                                 "SP with %s (nice %s): %d",
1645                                                 state.Node.Name, NicenessFmt(state.Nice), head.Type,
1646                                         )
1647                                 },
1648                         )
1649                         return nil, BadPktType
1650                 }
1651         }
1652
1653         if infosGot {
1654                 var pkts int
1655                 var size uint64
1656                 state.RLock()
1657                 for _, info := range state.infosTheir {
1658                         pkts++
1659                         size += info.Size
1660                 }
1661                 state.RUnlock()
1662                 state.Ctx.LogI("sp-infos-rx", LEs{
1663                         {"XX", string(TRx)},
1664                         {"Node", state.Node.Id},
1665                         {"Pkts", pkts},
1666                         {"Size", int64(size)},
1667                 }, func(les LEs) string {
1668                         return fmt.Sprintf(
1669                                 "%s has got for us: %d packets, %s",
1670                                 state.Node.Name, pkts, humanize.IBytes(size),
1671                         )
1672                 })
1673         }
1674         return payloadsSplit(replies), nil
1675 }
1676
1677 func SPChecker(ctx *Ctx) {
1678         for t := range spCheckerTasks {
1679                 pktName := Base32Codec.EncodeToString(t.hsh[:])
1680                 les := LEs{
1681                         {"XX", string(TRx)},
1682                         {"Node", t.nodeId},
1683                         {"Pkt", pktName},
1684                 }
1685                 SPCheckerWg.Add(1)
1686                 ctx.LogD("sp-checker", les, func(les LEs) string {
1687                         return fmt.Sprintf("Checksumming %s/rx/%s", ctx.NodeName(t.nodeId), pktName)
1688                 })
1689                 size, err := ctx.CheckNoCK(t.nodeId, t.hsh, t.mth)
1690                 les = append(les, LE{"Size", size})
1691                 if err != nil {
1692                         ctx.LogE("sp-checker", les, err, func(les LEs) string {
1693                                 return fmt.Sprintf(
1694                                         "Checksumming %s/rx/%s (%s)", ctx.NodeName(t.nodeId), pktName,
1695                                         humanize.IBytes(uint64(size)),
1696                                 )
1697                         })
1698                         SPCheckerWg.Done()
1699                         continue
1700                 }
1701                 ctx.LogI("sp-checker-done", les, func(les LEs) string {
1702                         return fmt.Sprintf(
1703                                 "Packet %s is retreived (%s)",
1704                                 pktName, humanize.IBytes(uint64(size)),
1705                         )
1706                 })
1707                 SPCheckerWg.Done()
1708                 go func(t SPCheckerTask) {
1709                         defer func() { recover() }()
1710                         t.done <- MarshalSP(SPTypeDone, SPDone{t.hsh})
1711                 }(t)
1712         }
1713 }