]> Cypherpunks.ru repositories - nncp.git/blobdiff - src/cypherpunks.ru/nncp/sp.go
Forbid any later GNU GPL versions autousage
[nncp.git] / src / cypherpunks.ru / nncp / sp.go
index d2f329eae25554ff4b07329d93bfb0c63d6a3aee..7e2f7c3be104029977f94fa6e1cdc7b52aa89273 100644 (file)
@@ -1,11 +1,10 @@
 /*
 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
-Copyright (C) 2016-2018 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2016-2019 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, version 3 of the License.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -104,6 +103,12 @@ type FreqWithNice struct {
        nice uint8
 }
 
+type ConnDeadlined interface {
+       io.ReadWriter
+       SetReadDeadline(t time.Time) error
+       SetWriteDeadline(t time.Time) error
+}
+
 func init() {
        var buf bytes.Buffer
        spHead := SPHead{Type: SPTypeHalt}
@@ -164,11 +169,11 @@ func payloadsSplit(payloads [][]byte) [][]byte {
 }
 
 type SPState struct {
-       ctx            *Ctx
+       Ctx            *Ctx
        Node           *Node
+       Nice           uint8
        onlineDeadline uint
        maxOnlineTime  uint
-       nice           uint8
        hs             *noise.HandshakeState
        csOur          *noise.CipherState
        csTheir        *noise.CipherState
@@ -191,6 +196,8 @@ type SPState struct {
        rxRate         int
        txRate         int
        isDead         bool
+       listOnly       bool
+       onlyPkts       map[[32]byte]bool
        sync.RWMutex
 }
 
@@ -202,12 +209,13 @@ func (state *SPState) NotAlive() bool {
        if state.maxOnlineTime > 0 && state.started.Add(time.Duration(state.maxOnlineTime)*time.Second).Before(now) {
                return true
        }
-       return uint(now.Sub(state.RxLastSeen).Seconds()) >= state.onlineDeadline && uint(now.Sub(state.TxLastSeen).Seconds()) >= state.onlineDeadline
+       return uint(now.Sub(state.RxLastSeen).Seconds()) >= state.onlineDeadline &&
+               uint(now.Sub(state.TxLastSeen).Seconds()) >= state.onlineDeadline
 }
 
 func (state *SPState) dirUnlock() {
-       state.ctx.UnlockDir(state.rxLock)
-       state.ctx.UnlockDir(state.txLock)
+       state.Ctx.UnlockDir(state.rxLock)
+       state.Ctx.UnlockDir(state.txLock)
 }
 
 func (state *SPState) WriteSP(dst io.Writer, payload []byte) error {
@@ -273,62 +281,52 @@ func (ctx *Ctx) infosOur(nodeId *NodeId, nice uint8, seen *map[[32]byte]uint8) [
        return payloadsSplit(payloads)
 }
 
-func (ctx *Ctx) StartI(conn net.Conn, nodeId *NodeId, nice uint8, xxOnly TRxTx, rxRate, txRate int, onlineDeadline, maxOnlineTime uint) (*SPState, error) {
-       err := ctx.ensureRxDir(nodeId)
+func (state *SPState) StartI(conn ConnDeadlined) error {
+       nodeId := state.Node.Id
+       err := state.Ctx.ensureRxDir(nodeId)
        if err != nil {
-               return nil, err
+               return err
        }
        var rxLock *os.File
-       if xxOnly == "" || xxOnly == TRx {
-               rxLock, err = ctx.LockDir(nodeId, TRx)
+       if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TRx) {
+               rxLock, err = state.Ctx.LockDir(nodeId, TRx)
                if err != nil {
-                       return nil, err
+                       return err
                }
        }
        var txLock *os.File
-       if xxOnly == "" || xxOnly == TTx {
-               txLock, err = ctx.LockDir(nodeId, TTx)
+       if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
+               txLock, err = state.Ctx.LockDir(nodeId, TTx)
                if err != nil {
-                       return nil, err
+                       return err
                }
        }
        started := time.Now()
-       node := ctx.Neigh[*nodeId]
        conf := noise.Config{
                CipherSuite: NoiseCipherSuite,
                Pattern:     noise.HandshakeIK,
                Initiator:   true,
                StaticKeypair: noise.DHKey{
-                       Private: ctx.Self.NoisePrv[:],
-                       Public:  ctx.Self.NoisePub[:],
+                       Private: state.Ctx.Self.NoisePrv[:],
+                       Public:  state.Ctx.Self.NoisePub[:],
                },
-               PeerStatic: node.NoisePub[:],
+               PeerStatic: state.Node.NoisePub[:],
        }
        hs, err := noise.NewHandshakeState(conf)
        if err != nil {
-               return nil, err
-       }
-       state := SPState{
-               ctx:            ctx,
-               hs:             hs,
-               Node:           node,
-               onlineDeadline: onlineDeadline,
-               maxOnlineTime:  maxOnlineTime,
-               nice:           nice,
-               payloads:       make(chan []byte),
-               infosTheir:     make(map[[32]byte]*SPInfo),
-               infosOurSeen:   make(map[[32]byte]uint8),
-               started:        started,
-               rxLock:         rxLock,
-               txLock:         txLock,
-               xxOnly:         xxOnly,
-               rxRate:         rxRate,
-               txRate:         txRate,
+               return err
        }
+       state.hs = hs
+       state.payloads = make(chan []byte)
+       state.infosTheir = make(map[[32]byte]*SPInfo)
+       state.infosOurSeen = make(map[[32]byte]uint8)
+       state.started = started
+       state.rxLock = rxLock
+       state.txLock = txLock
 
        var infosPayloads [][]byte
-       if xxOnly == "" || xxOnly == TTx {
-               infosPayloads = ctx.infosOur(nodeId, nice, &state.infosOurSeen)
+       if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
+               infosPayloads = state.Ctx.infosOur(nodeId, state.Nice, &state.infosOurSeen)
        }
        var firstPayload []byte
        if len(infosPayloads) > 0 {
@@ -344,122 +342,119 @@ func (ctx *Ctx) StartI(conn net.Conn, nodeId *NodeId, nice uint8, xxOnly TRxTx,
        buf, _, _, err = state.hs.WriteMessage(nil, firstPayload)
        if err != nil {
                state.dirUnlock()
-               return nil, err
+               return err
        }
-       sds := SDS{"node": nodeId, "nice": strconv.Itoa(int(nice))}
-       ctx.LogD("sp-start", sds, "sending first message")
+       sds := SDS{"node": nodeId, "nice": strconv.Itoa(int(state.Nice))}
+       state.Ctx.LogD("sp-start", sds, "sending first message")
        conn.SetWriteDeadline(time.Now().Add(DefaultDeadline * time.Second))
        if err = state.WriteSP(conn, buf); err != nil {
-               ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
+               state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
                state.dirUnlock()
-               return nil, err
+               return err
        }
-       ctx.LogD("sp-start", sds, "waiting for first message")
+       state.Ctx.LogD("sp-start", sds, "waiting for first message")
        conn.SetReadDeadline(time.Now().Add(DefaultDeadline * time.Second))
        if buf, err = state.ReadSP(conn); err != nil {
-               ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
+               state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
                state.dirUnlock()
-               return nil, err
+               return err
        }
        payload, state.csOur, state.csTheir, err = state.hs.ReadMessage(nil, buf)
        if err != nil {
-               ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
+               state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
                state.dirUnlock()
-               return nil, err
+               return err
        }
-       ctx.LogD("sp-start", sds, "starting workers")
+       state.Ctx.LogD("sp-start", sds, "starting workers")
        err = state.StartWorkers(conn, infosPayloads, payload)
        if err != nil {
-               ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
+               state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
                state.dirUnlock()
-               return nil, err
+               return err
        }
-       return &state, err
+       return err
 }
 
-func (ctx *Ctx) StartR(conn net.Conn, nice uint8, xxOnly TRxTx) (*SPState, error) {
+func (state *SPState) StartR(conn ConnDeadlined) error {
        started := time.Now()
        conf := noise.Config{
                CipherSuite: NoiseCipherSuite,
                Pattern:     noise.HandshakeIK,
                Initiator:   false,
                StaticKeypair: noise.DHKey{
-                       Private: ctx.Self.NoisePrv[:],
-                       Public:  ctx.Self.NoisePub[:],
+                       Private: state.Ctx.Self.NoisePrv[:],
+                       Public:  state.Ctx.Self.NoisePub[:],
                },
        }
        hs, err := noise.NewHandshakeState(conf)
        if err != nil {
-               return nil, err
-       }
-       state := SPState{
-               ctx:          ctx,
-               hs:           hs,
-               nice:         nice,
-               payloads:     make(chan []byte),
-               infosOurSeen: make(map[[32]byte]uint8),
-               infosTheir:   make(map[[32]byte]*SPInfo),
-               started:      started,
-               xxOnly:       xxOnly,
+               return err
        }
+       xxOnly := TRxTx("")
+       state.hs = hs
+       state.payloads = make(chan []byte)
+       state.infosOurSeen = make(map[[32]byte]uint8)
+       state.infosTheir = make(map[[32]byte]*SPInfo)
+       state.started = started
+       state.xxOnly = xxOnly
        var buf []byte
        var payload []byte
-       ctx.LogD(
+       state.Ctx.LogD(
                "sp-start",
-               SDS{"nice": strconv.Itoa(int(nice))},
+               SDS{"nice": strconv.Itoa(int(state.Nice))},
                "waiting for first message",
        )
        conn.SetReadDeadline(time.Now().Add(DefaultDeadline * time.Second))
        if buf, err = state.ReadSP(conn); err != nil {
-               ctx.LogE("sp-start", SDS{"err": err}, "")
-               return nil, err
+               state.Ctx.LogE("sp-start", SDS{"err": err}, "")
+               return err
        }
        if payload, _, _, err = state.hs.ReadMessage(nil, buf); err != nil {
-               ctx.LogE("sp-start", SDS{"err": err}, "")
-               return nil, err
+               state.Ctx.LogE("sp-start", SDS{"err": err}, "")
+               return err
        }
 
        var node *Node
-       for _, node = range ctx.Neigh {
+       for _, node = range state.Ctx.Neigh {
                if subtle.ConstantTimeCompare(state.hs.PeerStatic(), node.NoisePub[:]) == 1 {
                        break
                }
        }
        if node == nil {
                peerId := ToBase32(state.hs.PeerStatic())
-               ctx.LogE("sp-start", SDS{"peer": peerId}, "unknown")
-               return nil, errors.New("Unknown peer: " + peerId)
+               state.Ctx.LogE("sp-start", SDS{"peer": peerId}, "unknown")
+               return errors.New("Unknown peer: " + peerId)
        }
        state.Node = node
        state.rxRate = node.RxRate
        state.txRate = node.TxRate
        state.onlineDeadline = node.OnlineDeadline
        state.maxOnlineTime = node.MaxOnlineTime
-       sds := SDS{"node": node.Id, "nice": strconv.Itoa(int(nice))}
+       sds := SDS{"node": node.Id, "nice": strconv.Itoa(int(state.Nice))}
 
-       if ctx.ensureRxDir(node.Id); err != nil {
-               return nil, err
+       if state.Ctx.ensureRxDir(node.Id); err != nil {
+               return err
        }
        var rxLock *os.File
        if xxOnly == "" || xxOnly == TRx {
-               rxLock, err = ctx.LockDir(node.Id, TRx)
+               rxLock, err = state.Ctx.LockDir(node.Id, TRx)
                if err != nil {
-                       return nil, err
+                       return err
                }
        }
        state.rxLock = rxLock
        var txLock *os.File
        if xxOnly == "" || xxOnly == TTx {
-               txLock, err = ctx.LockDir(node.Id, TTx)
+               txLock, err = state.Ctx.LockDir(node.Id, TTx)
                if err != nil {
-                       return nil, err
+                       return err
                }
        }
        state.txLock = txLock
 
        var infosPayloads [][]byte
        if xxOnly == "" || xxOnly == TTx {
-               infosPayloads = ctx.infosOur(node.Id, nice, &state.infosOurSeen)
+               infosPayloads = state.Ctx.infosOur(node.Id, state.Nice, &state.infosOurSeen)
        }
        var firstPayload []byte
        if len(infosPayloads) > 0 {
@@ -470,33 +465,36 @@ func (ctx *Ctx) StartR(conn net.Conn, nice uint8, xxOnly TRxTx) (*SPState, error
                firstPayload = append(firstPayload, SPHaltMarshalized...)
        }
 
-       ctx.LogD("sp-start", sds, "sending first message")
+       state.Ctx.LogD("sp-start", sds, "sending first message")
        buf, state.csTheir, state.csOur, err = state.hs.WriteMessage(nil, firstPayload)
        if err != nil {
                state.dirUnlock()
-               return nil, err
+               return err
        }
        conn.SetWriteDeadline(time.Now().Add(DefaultDeadline * time.Second))
        if err = state.WriteSP(conn, buf); err != nil {
-               ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
+               state.Ctx.LogE("sp-start", SdsAdd(sds, SDS{"err": err}), "")
                state.dirUnlock()
-               return nil, err
+               return err
        }
-       ctx.LogD("sp-start", sds, "starting workers")
+       state.Ctx.LogD("sp-start", sds, "starting workers")
        err = state.StartWorkers(conn, infosPayloads, payload)
        if err != nil {
                state.dirUnlock()
-               return nil, err
+               return err
        }
-       return &state, err
+       return err
 }
 
-func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payload []byte) error {
-       sds := SDS{"node": state.Node.Id, "nice": strconv.Itoa(int(state.nice))}
+func (state *SPState) StartWorkers(
+       conn ConnDeadlined,
+       infosPayloads [][]byte,
+       payload []byte) error {
+       sds := SDS{"node": state.Node.Id, "nice": strconv.Itoa(int(state.Nice))}
        if len(infosPayloads) > 1 {
                go func() {
                        for _, payload := range infosPayloads[1:] {
-                               state.ctx.LogD(
+                               state.Ctx.LogD(
                                        "sp-work",
                                        SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
                                        "queuing remaining payload",
@@ -505,20 +503,20 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                        }
                }()
        }
-       state.ctx.LogD(
+       state.Ctx.LogD(
                "sp-work",
                SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
                "processing first payload",
        )
        replies, err := state.ProcessSP(payload)
        if err != nil {
-               state.ctx.LogE("sp-work", SdsAdd(sds, SDS{"err": err}), "")
+               state.Ctx.LogE("sp-work", SdsAdd(sds, SDS{"err": err}), "")
                return err
        }
 
        go func() {
                for _, reply := range replies {
-                       state.ctx.LogD(
+                       state.Ctx.LogD(
                                "sp-work",
                                SdsAdd(sds, SDS{"size": strconv.Itoa(len(reply))}),
                                "queuing reply",
@@ -527,15 +525,18 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                }
        }()
 
-       if state.xxOnly == "" || state.xxOnly == TTx {
+       if !state.listOnly && (state.xxOnly == "" || state.xxOnly == TTx) {
                go func() {
                        for range time.Tick(time.Second) {
-                               for _, payload := range state.ctx.infosOur(
+                               if state.NotAlive() {
+                                       return
+                               }
+                               for _, payload := range state.Ctx.infosOur(
                                        state.Node.Id,
-                                       state.nice,
+                                       state.Nice,
                                        &state.infosOurSeen,
                                ) {
-                                       state.ctx.LogD(
+                                       state.Ctx.LogD(
                                                "sp-work",
                                                SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
                                                "queuing new info",
@@ -559,7 +560,7 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                        var payload []byte
                        select {
                        case payload = <-state.payloads:
-                               state.ctx.LogD(
+                               state.Ctx.LogD(
                                        "sp-xmit",
                                        SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
                                        "got payload",
@@ -569,7 +570,7 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                        if payload == nil {
                                state.RLock()
                                if len(state.queueTheir) == 0 {
-                                       state.ctx.LogD("sp-xmit", sds, "file queue is empty")
+                                       state.Ctx.LogD("sp-xmit", sds, "file queue is empty")
                                        state.RUnlock()
                                        time.Sleep(100 * time.Millisecond)
                                        continue
@@ -586,38 +587,38 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                                        "hash": ToBase32(freq.Hash[:]),
                                        "size": strconv.FormatInt(int64(freq.Offset), 10),
                                })
-                               state.ctx.LogD("sp-file", sdsp, "queueing")
+                               state.Ctx.LogD("sp-file", sdsp, "queueing")
                                fd, err := os.Open(filepath.Join(
-                                       state.ctx.Spool,
+                                       state.Ctx.Spool,
                                        state.Node.Id.String(),
                                        string(TTx),
                                        ToBase32(freq.Hash[:]),
                                ))
                                if err != nil {
-                                       state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
+                                       state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
                                        break
                                }
                                fi, err := fd.Stat()
                                if err != nil {
-                                       state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
+                                       state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
                                        break
                                }
                                fullSize := uint64(fi.Size())
                                var buf []byte
                                if freq.Offset < fullSize {
-                                       state.ctx.LogD("sp-file", sdsp, "seeking")
-                                       if _, err = fd.Seek(int64(freq.Offset), 0); err != nil {
-                                               state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
+                                       state.Ctx.LogD("sp-file", sdsp, "seeking")
+                                       if _, err = fd.Seek(int64(freq.Offset), io.SeekStart); err != nil {
+                                               state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
                                                break
                                        }
                                        buf = make([]byte, MaxSPSize-SPHeadOverhead-SPFileOverhead)
                                        n, err := fd.Read(buf)
                                        if err != nil {
-                                               state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
+                                               state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
                                                break
                                        }
                                        buf = buf[:n]
-                                       state.ctx.LogD(
+                                       state.Ctx.LogD(
                                                "sp-file",
                                                SdsAdd(sdsp, SDS{"size": strconv.Itoa(n)}),
                                                "read",
@@ -632,11 +633,11 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                                ourSize := freq.Offset + uint64(len(buf))
                                sdsp["size"] = strconv.FormatInt(int64(ourSize), 10)
                                sdsp["fullsize"] = strconv.FormatInt(int64(fullSize), 10)
-                               state.ctx.LogP("sp-file", sdsp, "")
+                               state.Ctx.LogP("sp-file", sdsp, "")
                                state.Lock()
                                if len(state.queueTheir) > 0 && *state.queueTheir[0].freq.Hash == *freq.Hash {
                                        if ourSize == fullSize {
-                                               state.ctx.LogD("sp-file", sdsp, "finished")
+                                               state.Ctx.LogD("sp-file", sdsp, "finished")
                                                if len(state.queueTheir) > 1 {
                                                        state.queueTheir = state.queueTheir[1:]
                                                } else {
@@ -646,18 +647,18 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                                                state.queueTheir[0].freq.Offset += uint64(len(buf))
                                        }
                                } else {
-                                       state.ctx.LogD("sp-file", sdsp, "queue disappeared")
+                                       state.Ctx.LogD("sp-file", sdsp, "queue disappeared")
                                }
                                state.Unlock()
                        }
-                       state.ctx.LogD(
+                       state.Ctx.LogD(
                                "sp-xmit",
                                SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
                                "sending",
                        )
                        conn.SetWriteDeadline(time.Now().Add(DefaultDeadline * time.Second))
                        if err := state.WriteSP(conn, state.csOur.Encrypt(nil, nil, payload)); err != nil {
-                               state.ctx.LogE("sp-xmit", SdsAdd(sds, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-xmit", SdsAdd(sds, SDS{"err": err}), "")
                                break
                        }
                }
@@ -673,7 +674,7 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                        if state.NotAlive() {
                                return
                        }
-                       state.ctx.LogD("sp-recv", sds, "waiting for payload")
+                       state.Ctx.LogD("sp-recv", sds, "waiting for payload")
                        conn.SetReadDeadline(time.Now().Add(DefaultDeadline * time.Second))
                        payload, err := state.ReadSP(conn)
                        if err != nil {
@@ -685,32 +686,32 @@ func (state *SPState) StartWorkers(conn net.Conn, infosPayloads [][]byte, payloa
                                if unmarshalErr.ErrorCode == xdr.ErrIO {
                                        break
                                }
-                               state.ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
                                break
                        }
-                       state.ctx.LogD(
+                       state.Ctx.LogD(
                                "sp-recv",
                                SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
                                "got payload",
                        )
                        payload, err = state.csTheir.Decrypt(nil, nil, payload)
                        if err != nil {
-                               state.ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
                                break
                        }
-                       state.ctx.LogD(
+                       state.Ctx.LogD(
                                "sp-recv",
                                SdsAdd(sds, SDS{"size": strconv.Itoa(len(payload))}),
                                "processing",
                        )
                        replies, err := state.ProcessSP(payload)
                        if err != nil {
-                               state.ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-recv", SdsAdd(sds, SDS{"err": err}), "")
                                break
                        }
                        go func() {
                                for _, reply := range replies {
-                                       state.ctx.LogD(
+                                       state.Ctx.LogD(
                                                "sp-recv",
                                                SdsAdd(sds, SDS{"size": strconv.Itoa(len(reply))}),
                                                "queuing reply",
@@ -744,123 +745,129 @@ func (state *SPState) Wait() {
 }
 
 func (state *SPState) ProcessSP(payload []byte) ([][]byte, error) {
-       sds := SDS{"node": state.Node.Id, "nice": strconv.Itoa(int(state.nice))}
+       sds := SDS{"node": state.Node.Id, "nice": strconv.Itoa(int(state.Nice))}
        r := bytes.NewReader(payload)
        var err error
        var replies [][]byte
        var infosGot bool
        for r.Len() > 0 {
-               state.ctx.LogD("sp-process", sds, "unmarshaling header")
+               state.Ctx.LogD("sp-process", sds, "unmarshaling header")
                var head SPHead
                if _, err = xdr.Unmarshal(r, &head); err != nil {
-                       state.ctx.LogE("sp-process", SdsAdd(sds, SDS{"err": err}), "")
+                       state.Ctx.LogE("sp-process", SdsAdd(sds, SDS{"err": err}), "")
                        return nil, err
                }
                switch head.Type {
                case SPTypeInfo:
                        infosGot = true
                        sdsp := SdsAdd(sds, SDS{"type": "info"})
-                       state.ctx.LogD("sp-process", sdsp, "unmarshaling packet")
+                       state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
                        var info SPInfo
                        if _, err = xdr.Unmarshal(r, &info); err != nil {
-                               state.ctx.LogE("sp-process", SdsAdd(sdsp, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-process", SdsAdd(sdsp, SDS{"err": err}), "")
                                return nil, err
                        }
                        sdsp = SdsAdd(sds, SDS{
                                "hash": ToBase32(info.Hash[:]),
                                "size": strconv.FormatInt(int64(info.Size), 10),
+                               "nice": strconv.Itoa(int(info.Nice)),
                        })
-                       if info.Nice > state.nice {
-                               state.ctx.LogD("sp-process", sdsp, "too nice")
+                       if !state.listOnly && info.Nice > state.Nice {
+                               state.Ctx.LogD("sp-process", sdsp, "too nice")
                                continue
                        }
-                       state.ctx.LogD("sp-process", sdsp, "received")
-                       if state.xxOnly == TTx {
+                       state.Ctx.LogD("sp-process", sdsp, "received")
+                       if !state.listOnly && state.xxOnly == TTx {
                                continue
                        }
                        state.Lock()
                        state.infosTheir[*info.Hash] = &info
                        state.Unlock()
-                       state.ctx.LogD("sp-process", sdsp, "stating part")
+                       state.Ctx.LogD("sp-process", sdsp, "stating part")
                        pktPath := filepath.Join(
-                               state.ctx.Spool,
+                               state.Ctx.Spool,
                                state.Node.Id.String(),
                                string(TRx),
                                ToBase32(info.Hash[:]),
                        )
                        if _, err = os.Stat(pktPath); err == nil {
-                               state.ctx.LogD("sp-process", sdsp, "already done")
-                               replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
+                               state.Ctx.LogI("sp-info", sdsp, "already done")
+                               if !state.listOnly {
+                                       replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
+                               }
                                continue
                        }
                        if _, err = os.Stat(pktPath + SeenSuffix); err == nil {
-                               state.ctx.LogD("sp-process", sdsp, "already seen")
-                               replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
+                               state.Ctx.LogI("sp-info", sdsp, "already seen")
+                               if !state.listOnly {
+                                       replies = append(replies, MarshalSP(SPTypeDone, SPDone{info.Hash}))
+                               }
                                continue
                        }
                        fi, err := os.Stat(pktPath + PartSuffix)
                        var offset int64
                        if err == nil {
                                offset = fi.Size()
-                               state.ctx.LogD(
-                                       "sp-process",
-                                       SdsAdd(sdsp, SDS{"offset": strconv.FormatInt(offset, 10)}),
-                                       "part exists",
-                               )
                        }
-                       replies = append(replies, MarshalSP(
-                               SPTypeFreq,
-                               SPFreq{info.Hash, uint64(offset)},
-                       ))
-               case SPTypeFile:
-                       state.ctx.LogD(
-                               "sp-process",
-                               SdsAdd(sds, SDS{"type": "file"}),
-                               "unmarshaling packet",
+                       if !state.Ctx.IsEnoughSpace(int64(info.Size) - offset) {
+                               state.Ctx.LogI("sp-info", sdsp, "not enough space")
+                               continue
+                       }
+                       state.Ctx.LogI(
+                               "sp-info",
+                               SdsAdd(sdsp, SDS{"offset": strconv.FormatInt(offset, 10)}),
+                               "",
                        )
+                       if !state.listOnly && (state.onlyPkts == nil || state.onlyPkts[*info.Hash]) {
+                               replies = append(replies, MarshalSP(
+                                       SPTypeFreq,
+                                       SPFreq{info.Hash, uint64(offset)},
+                               ))
+                       }
+               case SPTypeFile:
+                       sdsp := SdsAdd(sds, SDS{"type": "file"})
+                       state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
                        var file SPFile
                        if _, err = xdr.Unmarshal(r, &file); err != nil {
-                               state.ctx.LogE("sp-process", SdsAdd(sds, SDS{
+                               state.Ctx.LogE("sp-process", SdsAdd(sds, SDS{
                                        "err":  err,
                                        "type": "file",
                                }), "")
                                return nil, err
                        }
-                       sdsp := SdsAdd(sds, SDS{
-                               "xx":   string(TRx),
-                               "hash": ToBase32(file.Hash[:]),
-                               "size": strconv.Itoa(len(file.Payload)),
-                       })
+                       sdsp["xx"] = string(TRx)
+                       sdsp["hash"] = ToBase32(file.Hash[:])
+                       sdsp["size"] = strconv.Itoa(len(file.Payload))
                        filePath := filepath.Join(
-                               state.ctx.Spool,
+                               state.Ctx.Spool,
                                state.Node.Id.String(),
                                string(TRx),
                                ToBase32(file.Hash[:]),
                        )
-                       state.ctx.LogD("sp-file", sdsp, "opening part")
+                       state.Ctx.LogD("sp-file", sdsp, "opening part")
                        fd, err := os.OpenFile(
                                filePath+PartSuffix,
                                os.O_RDWR|os.O_CREATE,
                                os.FileMode(0600),
                        )
                        if err != nil {
-                               state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
                                return nil, err
                        }
-                       state.ctx.LogD(
+                       state.Ctx.LogD(
                                "sp-file",
                                SdsAdd(sdsp, SDS{"offset": strconv.FormatInt(int64(file.Offset), 10)}),
                                "seeking",
                        )
-                       if _, err = fd.Seek(int64(file.Offset), 0); err != nil {
-                               state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
+                       if _, err = fd.Seek(int64(file.Offset), io.SeekStart); err != nil {
+                               state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
                                fd.Close()
                                return nil, err
                        }
-                       state.ctx.LogD("sp-file", sdsp, "writing")
+                       state.Ctx.LogD("sp-file", sdsp, "writing")
                        _, err = fd.Write(file.Payload)
                        if err != nil {
-                               state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "")
                                fd.Close()
                                return nil, err
                        }
@@ -868,7 +875,7 @@ func (state *SPState) ProcessSP(payload []byte) ([][]byte, error) {
                        state.RLock()
                        sdsp["fullsize"] = strconv.FormatInt(int64(state.infosTheir[*file.Hash].Size), 10)
                        sdsp["size"] = strconv.FormatInt(int64(ourSize), 10)
-                       state.ctx.LogP("sp-file", sdsp, "")
+                       state.Ctx.LogP("sp-file", sdsp, "")
                        if state.infosTheir[*file.Hash].Size != ourSize {
                                state.RUnlock()
                                fd.Close()
@@ -879,21 +886,21 @@ func (state *SPState) ProcessSP(payload []byte) ([][]byte, error) {
                        spWorkersGroup.Add(1)
                        go func() {
                                if err := fd.Sync(); err != nil {
-                                       state.ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "sync")
+                                       state.Ctx.LogE("sp-file", SdsAdd(sdsp, SDS{"err": err}), "sync")
                                        fd.Close()
                                        return
                                }
                                state.wg.Add(1)
                                defer state.wg.Done()
-                               fd.Seek(0, 0)
-                               state.ctx.LogD("sp-file", sdsp, "checking")
+                               fd.Seek(0, io.SeekStart)
+                               state.Ctx.LogD("sp-file", sdsp, "checking")
                                gut, err := Check(fd, file.Hash[:])
                                fd.Close()
                                if err != nil || !gut {
-                                       state.ctx.LogE("sp-file", sdsp, "checksum mismatch")
+                                       state.Ctx.LogE("sp-file", sdsp, "checksum mismatch")
                                        return
                                }
-                               state.ctx.LogI("sp-done", SdsAdd(sdsp, SDS{"xx": string(TRx)}), "")
+                               state.Ctx.LogI("sp-done", SdsAdd(sdsp, SDS{"xx": string(TRx)}), "")
                                os.Rename(filePath+PartSuffix, filePath)
                                state.Lock()
                                delete(state.infosTheir, *file.Hash)
@@ -904,72 +911,69 @@ func (state *SPState) ProcessSP(payload []byte) ([][]byte, error) {
                                }()
                        }()
                case SPTypeDone:
-                       state.ctx.LogD(
-                               "sp-process",
-                               SdsAdd(sds, SDS{"type": "done"}),
-                               "unmarshaling packet",
-                       )
+                       sdsp := SdsAdd(sds, SDS{"type": "done"})
+                       state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
                        var done SPDone
                        if _, err = xdr.Unmarshal(r, &done); err != nil {
-                               state.ctx.LogE("sp-process", SdsAdd(sds, SDS{
+                               state.Ctx.LogE("sp-process", SdsAdd(sds, SDS{
                                        "type": "done",
                                        "err":  err,
                                }), "")
                                return nil, err
                        }
-                       sdsp := SdsAdd(sds, SDS{"hash": ToBase32(done.Hash[:])})
-                       state.ctx.LogD("sp-done", sdsp, "removing")
+                       sdsp["hash"] = ToBase32(done.Hash[:])
+                       state.Ctx.LogD("sp-done", sdsp, "removing")
                        err := os.Remove(filepath.Join(
-                               state.ctx.Spool,
+                               state.Ctx.Spool,
                                state.Node.Id.String(),
                                string(TTx),
                                ToBase32(done.Hash[:]),
                        ))
+                       sdsp["xx"] = string(TTx)
                        if err == nil {
-                               state.ctx.LogI("sp-done", SdsAdd(sdsp, SDS{"xx": string(TTx)}), "")
+                               state.Ctx.LogI("sp-done", sdsp, "")
                        } else {
-                               state.ctx.LogE("sp-done", SdsAdd(sdsp, SDS{"xx": string(TTx)}), "")
+                               state.Ctx.LogE("sp-done", sdsp, "")
                        }
                case SPTypeFreq:
                        sdsp := SdsAdd(sds, SDS{"type": "freq"})
-                       state.ctx.LogD("sp-process", sdsp, "unmarshaling packet")
+                       state.Ctx.LogD("sp-process", sdsp, "unmarshaling packet")
                        var freq SPFreq
                        if _, err = xdr.Unmarshal(r, &freq); err != nil {
-                               state.ctx.LogE("sp-process", SdsAdd(sdsp, SDS{"err": err}), "")
+                               state.Ctx.LogE("sp-process", SdsAdd(sdsp, SDS{"err": err}), "")
                                return nil, err
                        }
-                       state.ctx.LogD("sp-process", SdsAdd(sdsp, SDS{
-                               "hash":   ToBase32(freq.Hash[:]),
-                               "offset": strconv.FormatInt(int64(freq.Offset), 10),
-                       }), "queueing")
+                       sdsp["hash"] = ToBase32(freq.Hash[:])
+                       sdsp["offset"] = strconv.FormatInt(int64(freq.Offset), 10)
+                       state.Ctx.LogD("sp-process", sdsp, "queueing")
                        nice, exists := state.infosOurSeen[*freq.Hash]
                        if exists {
-                               state.Lock()
-                               insertIdx := 0
-                               var freqWithNice *FreqWithNice
-                               for insertIdx, freqWithNice = range state.queueTheir {
-                                       if freqWithNice.nice > nice {
-                                               break
+                               if state.onlyPkts == nil || !state.onlyPkts[*freq.Hash] {
+                                       state.Lock()
+                                       insertIdx := 0
+                                       var freqWithNice *FreqWithNice
+                                       for insertIdx, freqWithNice = range state.queueTheir {
+                                               if freqWithNice.nice > nice {
+                                                       break
+                                               }
                                        }
+                                       state.queueTheir = append(state.queueTheir, nil)
+                                       copy(state.queueTheir[insertIdx+1:], state.queueTheir[insertIdx:])
+                                       state.queueTheir[insertIdx] = &FreqWithNice{&freq, nice}
+                                       state.Unlock()
+                               } else {
+                                       state.Ctx.LogD("sp-process", sdsp, "skipping")
                                }
-                               state.queueTheir = append(state.queueTheir, nil)
-                               copy(state.queueTheir[insertIdx+1:], state.queueTheir[insertIdx:])
-                               state.queueTheir[insertIdx] = &FreqWithNice{&freq, nice}
-                               state.Unlock()
                        } else {
-                               state.ctx.LogD("sp-process", SdsAdd(sdsp, SDS{
-                                       "hash":   ToBase32(freq.Hash[:]),
-                                       "offset": strconv.FormatInt(int64(freq.Offset), 10),
-                               }), "unknown")
+                               state.Ctx.LogD("sp-process", sdsp, "unknown")
                        }
                case SPTypeHalt:
-                       sdsp := SdsAdd(sds, SDS{"type": "halt"})
-                       state.ctx.LogD("sp-process", sdsp, "")
+                       state.Ctx.LogD("sp-process", SdsAdd(sds, SDS{"type": "halt"}), "")
                        state.Lock()
                        state.queueTheir = nil
                        state.Unlock()
                default:
-                       state.ctx.LogE(
+                       state.Ctx.LogE(
                                "sp-process",
                                SdsAdd(sds, SDS{"type": head.Type}),
                                "unknown",
@@ -986,7 +990,7 @@ func (state *SPState) ProcessSP(payload []byte) ([][]byte, error) {
                        size += info.Size
                }
                state.RUnlock()
-               state.ctx.LogI("sp-infos", SDS{
+               state.Ctx.LogI("sp-infos", SDS{
                        "xx":   string(TRx),
                        "node": state.Node.Id,
                        "pkts": strconv.Itoa(pkts),