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---|---|---|---|---|---|---|---|---|---|---|---|
anacrolix/torrent | metainfo/metainfo.go | UpvertedAnnounceList | func (mi *MetaInfo) UpvertedAnnounceList() AnnounceList {
if mi.AnnounceList.OverridesAnnounce(mi.Announce) {
return mi.AnnounceList
}
if mi.Announce != "" {
return [][]string{[]string{mi.Announce}}
}
return nil
} | go | func (mi *MetaInfo) UpvertedAnnounceList() AnnounceList {
if mi.AnnounceList.OverridesAnnounce(mi.Announce) {
return mi.AnnounceList
}
if mi.Announce != "" {
return [][]string{[]string{mi.Announce}}
}
return nil
} | [
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// necessary. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/metainfo/metainfo.go#L79-L87 | train |
anacrolix/torrent | cmd/torrent-pick/main.go | totalBytesEstimate | func totalBytesEstimate(tc *torrent.Client) (ret int64) {
var noInfo, hadInfo int64
for _, t := range tc.Torrents() {
info := t.Info()
if info == nil {
noInfo++
continue
}
ret += info.TotalLength()
hadInfo++
}
if hadInfo != 0 {
// Treat each torrent without info as the average of those with,
// rounded up.
ret += (noInfo*ret + hadInfo - 1) / hadInfo
}
return
} | go | func totalBytesEstimate(tc *torrent.Client) (ret int64) {
var noInfo, hadInfo int64
for _, t := range tc.Torrents() {
info := t.Info()
if info == nil {
noInfo++
continue
}
ret += info.TotalLength()
hadInfo++
}
if hadInfo != 0 {
// Treat each torrent without info as the average of those with,
// rounded up.
ret += (noInfo*ret + hadInfo - 1) / hadInfo
}
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/cmd/torrent-pick/main.go#L51-L68 | train |
anacrolix/torrent | connection.go | ipv6 | func (cn *connection) ipv6() bool {
ip := cn.remoteAddr.IP
if ip.To4() != nil {
return false
}
return len(ip) == net.IPv6len
} | go | func (cn *connection) ipv6() bool {
ip := cn.remoteAddr.IP
if ip.To4() != nil {
return false
}
return len(ip) == net.IPv6len
} | [
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] | // Returns true if the connection is over IPv6. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L137-L143 | train |
anacrolix/torrent | connection.go | hasPreferredNetworkOver | func (l *connection) hasPreferredNetworkOver(r *connection) (left, ok bool) {
var ml multiLess
ml.NextBool(l.isPreferredDirection(), r.isPreferredDirection())
ml.NextBool(!l.utp(), !r.utp())
ml.NextBool(l.ipv6(), r.ipv6())
return ml.FinalOk()
} | go | func (l *connection) hasPreferredNetworkOver(r *connection) (left, ok bool) {
var ml multiLess
ml.NextBool(l.isPreferredDirection(), r.isPreferredDirection())
ml.NextBool(!l.utp(), !r.utp())
ml.NextBool(l.ipv6(), r.ipv6())
return ml.FinalOk()
} | [
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] | // Returns whether the left connection should be preferred over the right one,
// considering only their networking properties. If ok is false, we can't
// decide. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L154-L160 | train |
anacrolix/torrent | connection.go | bestPeerNumPieces | func (cn *connection) bestPeerNumPieces() pieceIndex {
if cn.t.haveInfo() {
return cn.t.numPieces()
}
return cn.peerMinPieces
} | go | func (cn *connection) bestPeerNumPieces() pieceIndex {
if cn.t.haveInfo() {
return cn.t.numPieces()
}
return cn.peerMinPieces
} | [
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] | // The best guess at number of pieces in the torrent for this peer. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L194-L199 | train |
anacrolix/torrent | connection.go | setNumPieces | func (cn *connection) setNumPieces(num pieceIndex) error {
cn.peerPieces.RemoveRange(bitmap.BitIndex(num), bitmap.ToEnd)
cn.peerPiecesChanged()
return nil
} | go | func (cn *connection) setNumPieces(num pieceIndex) error {
cn.peerPieces.RemoveRange(bitmap.BitIndex(num), bitmap.ToEnd)
cn.peerPiecesChanged()
return nil
} | [
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] | // Correct the PeerPieces slice length. Return false if the existing slice is
// invalid, such as by receiving badly sized BITFIELD, or invalid HAVE
// messages. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L212-L216 | train |
anacrolix/torrent | connection.go | Post | func (cn *connection) Post(msg pp.Message) {
torrent.Add(fmt.Sprintf("messages posted of type %s", msg.Type.String()), 1)
// We don't need to track bytes here because a connection.w Writer wrapper
// takes care of that (although there's some delay between us recording
// the message, and the connection writer flushing it out.).
cn.writeBuffer.Write(msg.MustMarshalBinary())
// Last I checked only Piece messages affect stats, and we don't post
// those.
cn.wroteMsg(&msg)
cn.tickleWriter()
} | go | func (cn *connection) Post(msg pp.Message) {
torrent.Add(fmt.Sprintf("messages posted of type %s", msg.Type.String()), 1)
// We don't need to track bytes here because a connection.w Writer wrapper
// takes care of that (although there's some delay between us recording
// the message, and the connection writer flushing it out.).
cn.writeBuffer.Write(msg.MustMarshalBinary())
// Last I checked only Piece messages affect stats, and we don't post
// those.
cn.wroteMsg(&msg)
cn.tickleWriter()
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L330-L340 | train |
anacrolix/torrent | connection.go | nominalMaxRequests | func (cn *connection) nominalMaxRequests() (ret int) {
if cn.t.requestStrategy == 3 {
expectingTime := int64(cn.totalExpectingTime())
if expectingTime == 0 {
expectingTime = math.MaxInt64
} else {
expectingTime *= 2
}
return int(clamp(
1,
int64(cn.PeerMaxRequests),
max(
// It makes sense to always pipeline at least one connection,
// since latency must be non-zero.
2,
// Request only as many as we expect to receive in the
// dupliateRequestTimeout window. We are trying to avoid having to
// duplicate requests.
cn.chunksReceivedWhileExpecting*int64(cn.t.duplicateRequestTimeout)/expectingTime,
),
))
}
return int(clamp(
1,
int64(cn.PeerMaxRequests),
max(64,
cn.stats.ChunksReadUseful.Int64()-(cn.stats.ChunksRead.Int64()-cn.stats.ChunksReadUseful.Int64()))))
} | go | func (cn *connection) nominalMaxRequests() (ret int) {
if cn.t.requestStrategy == 3 {
expectingTime := int64(cn.totalExpectingTime())
if expectingTime == 0 {
expectingTime = math.MaxInt64
} else {
expectingTime *= 2
}
return int(clamp(
1,
int64(cn.PeerMaxRequests),
max(
// It makes sense to always pipeline at least one connection,
// since latency must be non-zero.
2,
// Request only as many as we expect to receive in the
// dupliateRequestTimeout window. We are trying to avoid having to
// duplicate requests.
cn.chunksReceivedWhileExpecting*int64(cn.t.duplicateRequestTimeout)/expectingTime,
),
))
}
return int(clamp(
1,
int64(cn.PeerMaxRequests),
max(64,
cn.stats.ChunksReadUseful.Int64()-(cn.stats.ChunksRead.Int64()-cn.stats.ChunksReadUseful.Int64()))))
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L375-L402 | train |
anacrolix/torrent | connection.go | request | func (cn *connection) request(r request, mw messageWriter) bool {
if _, ok := cn.requests[r]; ok {
panic("chunk already requested")
}
if !cn.PeerHasPiece(pieceIndex(r.Index)) {
panic("requesting piece peer doesn't have")
}
if _, ok := cn.t.conns[cn]; !ok {
panic("requesting but not in active conns")
}
if cn.closed.IsSet() {
panic("requesting when connection is closed")
}
if cn.PeerChoked {
if cn.peerAllowedFast.Get(int(r.Index)) {
torrent.Add("allowed fast requests sent", 1)
} else {
panic("requesting while choked and not allowed fast")
}
}
if cn.t.hashingPiece(pieceIndex(r.Index)) {
panic("piece is being hashed")
}
if cn.t.pieceQueuedForHash(pieceIndex(r.Index)) {
panic("piece is queued for hash")
}
if cn.requests == nil {
cn.requests = make(map[request]struct{})
}
cn.requests[r] = struct{}{}
if cn.validReceiveChunks == nil {
cn.validReceiveChunks = make(map[request]struct{})
}
cn.validReceiveChunks[r] = struct{}{}
cn.t.pendingRequests[r]++
cn.t.lastRequested[r] = time.AfterFunc(cn.t.duplicateRequestTimeout, func() {
torrent.Add("duplicate request timeouts", 1)
cn.mu().Lock()
defer cn.mu().Unlock()
delete(cn.t.lastRequested, r)
for cn := range cn.t.conns {
if cn.PeerHasPiece(pieceIndex(r.Index)) {
cn.updateRequests()
}
}
})
cn.updateExpectingChunks()
return mw(pp.Message{
Type: pp.Request,
Index: r.Index,
Begin: r.Begin,
Length: r.Length,
})
} | go | func (cn *connection) request(r request, mw messageWriter) bool {
if _, ok := cn.requests[r]; ok {
panic("chunk already requested")
}
if !cn.PeerHasPiece(pieceIndex(r.Index)) {
panic("requesting piece peer doesn't have")
}
if _, ok := cn.t.conns[cn]; !ok {
panic("requesting but not in active conns")
}
if cn.closed.IsSet() {
panic("requesting when connection is closed")
}
if cn.PeerChoked {
if cn.peerAllowedFast.Get(int(r.Index)) {
torrent.Add("allowed fast requests sent", 1)
} else {
panic("requesting while choked and not allowed fast")
}
}
if cn.t.hashingPiece(pieceIndex(r.Index)) {
panic("piece is being hashed")
}
if cn.t.pieceQueuedForHash(pieceIndex(r.Index)) {
panic("piece is queued for hash")
}
if cn.requests == nil {
cn.requests = make(map[request]struct{})
}
cn.requests[r] = struct{}{}
if cn.validReceiveChunks == nil {
cn.validReceiveChunks = make(map[request]struct{})
}
cn.validReceiveChunks[r] = struct{}{}
cn.t.pendingRequests[r]++
cn.t.lastRequested[r] = time.AfterFunc(cn.t.duplicateRequestTimeout, func() {
torrent.Add("duplicate request timeouts", 1)
cn.mu().Lock()
defer cn.mu().Unlock()
delete(cn.t.lastRequested, r)
for cn := range cn.t.conns {
if cn.PeerHasPiece(pieceIndex(r.Index)) {
cn.updateRequests()
}
}
})
cn.updateExpectingChunks()
return mw(pp.Message{
Type: pp.Request,
Index: r.Index,
Begin: r.Begin,
Length: r.Length,
})
} | [
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] | // Proxies the messageWriter's response. | [
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"the",
"messageWriter",
"s",
"response",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L482-L535 | train |
anacrolix/torrent | connection.go | writer | func (cn *connection) writer(keepAliveTimeout time.Duration) {
var (
lastWrite time.Time = time.Now()
keepAliveTimer *time.Timer
)
keepAliveTimer = time.AfterFunc(keepAliveTimeout, func() {
cn.mu().Lock()
defer cn.mu().Unlock()
if time.Since(lastWrite) >= keepAliveTimeout {
cn.tickleWriter()
}
keepAliveTimer.Reset(keepAliveTimeout)
})
cn.mu().Lock()
defer cn.mu().Unlock()
defer cn.Close()
defer keepAliveTimer.Stop()
frontBuf := new(bytes.Buffer)
for {
if cn.closed.IsSet() {
return
}
if cn.writeBuffer.Len() == 0 {
cn.fillWriteBuffer(func(msg pp.Message) bool {
cn.wroteMsg(&msg)
cn.writeBuffer.Write(msg.MustMarshalBinary())
torrent.Add(fmt.Sprintf("messages filled of type %s", msg.Type.String()), 1)
return cn.writeBuffer.Len() < 1<<16 // 64KiB
})
}
if cn.writeBuffer.Len() == 0 && time.Since(lastWrite) >= keepAliveTimeout {
cn.writeBuffer.Write(pp.Message{Keepalive: true}.MustMarshalBinary())
postedKeepalives.Add(1)
}
if cn.writeBuffer.Len() == 0 {
// TODO: Minimize wakeups....
cn.writerCond.Wait()
continue
}
// Flip the buffers.
frontBuf, cn.writeBuffer = cn.writeBuffer, frontBuf
cn.mu().Unlock()
n, err := cn.w.Write(frontBuf.Bytes())
cn.mu().Lock()
if n != 0 {
lastWrite = time.Now()
keepAliveTimer.Reset(keepAliveTimeout)
}
if err != nil {
return
}
if n != frontBuf.Len() {
panic("short write")
}
frontBuf.Reset()
}
} | go | func (cn *connection) writer(keepAliveTimeout time.Duration) {
var (
lastWrite time.Time = time.Now()
keepAliveTimer *time.Timer
)
keepAliveTimer = time.AfterFunc(keepAliveTimeout, func() {
cn.mu().Lock()
defer cn.mu().Unlock()
if time.Since(lastWrite) >= keepAliveTimeout {
cn.tickleWriter()
}
keepAliveTimer.Reset(keepAliveTimeout)
})
cn.mu().Lock()
defer cn.mu().Unlock()
defer cn.Close()
defer keepAliveTimer.Stop()
frontBuf := new(bytes.Buffer)
for {
if cn.closed.IsSet() {
return
}
if cn.writeBuffer.Len() == 0 {
cn.fillWriteBuffer(func(msg pp.Message) bool {
cn.wroteMsg(&msg)
cn.writeBuffer.Write(msg.MustMarshalBinary())
torrent.Add(fmt.Sprintf("messages filled of type %s", msg.Type.String()), 1)
return cn.writeBuffer.Len() < 1<<16 // 64KiB
})
}
if cn.writeBuffer.Len() == 0 && time.Since(lastWrite) >= keepAliveTimeout {
cn.writeBuffer.Write(pp.Message{Keepalive: true}.MustMarshalBinary())
postedKeepalives.Add(1)
}
if cn.writeBuffer.Len() == 0 {
// TODO: Minimize wakeups....
cn.writerCond.Wait()
continue
}
// Flip the buffers.
frontBuf, cn.writeBuffer = cn.writeBuffer, frontBuf
cn.mu().Unlock()
n, err := cn.w.Write(frontBuf.Bytes())
cn.mu().Lock()
if n != 0 {
lastWrite = time.Now()
keepAliveTimer.Reset(keepAliveTimeout)
}
if err != nil {
return
}
if n != frontBuf.Len() {
panic("short write")
}
frontBuf.Reset()
}
} | [
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"}",
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"}"
] | // Routine that writes to the peer. Some of what to write is buffered by
// activity elsewhere in the Client, and some is determined locally when the
// connection is writable. | [
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"that",
"writes",
"to",
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"writable",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L593-L649 | train |
anacrolix/torrent | connection.go | iterBitmapsDistinct | func iterBitmapsDistinct(skip *bitmap.Bitmap, bms ...bitmap.Bitmap) iter.Func {
return func(cb iter.Callback) {
for _, bm := range bms {
if !iter.All(func(i interface{}) bool {
skip.Add(i.(int))
return cb(i)
}, bitmap.Sub(bm, *skip).Iter) {
return
}
}
}
} | go | func iterBitmapsDistinct(skip *bitmap.Bitmap, bms ...bitmap.Bitmap) iter.Func {
return func(cb iter.Callback) {
for _, bm := range bms {
if !iter.All(func(i interface{}) bool {
skip.Add(i.(int))
return cb(i)
}, bitmap.Sub(bm, *skip).Iter) {
return
}
}
}
} | [
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"}",
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"}"
] | // Emits the indices in the Bitmaps bms in order, never repeating any index.
// skip is mutated during execution, and its initial values will never be
// emitted. | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L684-L695 | train |
anacrolix/torrent | connection.go | shouldRequestWithoutBias | func (cn *connection) shouldRequestWithoutBias() bool {
if cn.t.requestStrategy != 2 {
return false
}
if len(cn.t.readers) == 0 {
return false
}
if len(cn.t.conns) == 1 {
return true
}
if cn == cn.t.fastestConn {
return true
}
return false
} | go | func (cn *connection) shouldRequestWithoutBias() bool {
if cn.t.requestStrategy != 2 {
return false
}
if len(cn.t.readers) == 0 {
return false
}
if len(cn.t.conns) == 1 {
return true
}
if cn == cn.t.fastestConn {
return true
}
return false
} | [
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] | // The connection should download highest priority pieces first, without any
// inclination toward avoiding wastage. Generally we might do this if there's
// a single connection, or this is the fastest connection, and we have active
// readers that signal an ordering preference. It's conceivable that the best
// connection should do this, since it's least likely to waste our time if
// assigned to the highest priority pieces, and assigning more than one this
// role would cause significant wasted bandwidth. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L738-L752 | train |
anacrolix/torrent | connection.go | stopRequestingPiece | func (cn *connection) stopRequestingPiece(piece pieceIndex) bool {
return cn.pieceRequestOrder.Remove(bitmap.BitIndex(piece))
} | go | func (cn *connection) stopRequestingPiece(piece pieceIndex) bool {
return cn.pieceRequestOrder.Remove(bitmap.BitIndex(piece))
} | [
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")",
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] | // check callers updaterequests | [
"check",
"callers",
"updaterequests"
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L811-L813 | train |
anacrolix/torrent | connection.go | updatePiecePriority | func (cn *connection) updatePiecePriority(piece pieceIndex) bool {
tpp := cn.t.piecePriority(piece)
if !cn.PeerHasPiece(piece) {
tpp = PiecePriorityNone
}
if tpp == PiecePriorityNone {
return cn.stopRequestingPiece(piece)
}
prio := cn.getPieceInclination()[piece]
switch cn.t.requestStrategy {
case 1:
switch tpp {
case PiecePriorityNormal:
case PiecePriorityReadahead:
prio -= int(cn.t.numPieces())
case PiecePriorityNext, PiecePriorityNow:
prio -= 2 * int(cn.t.numPieces())
default:
panic(tpp)
}
prio += int(piece / 3)
default:
}
return cn.pieceRequestOrder.Set(bitmap.BitIndex(piece), prio) || cn.shouldRequestWithoutBias()
} | go | func (cn *connection) updatePiecePriority(piece pieceIndex) bool {
tpp := cn.t.piecePriority(piece)
if !cn.PeerHasPiece(piece) {
tpp = PiecePriorityNone
}
if tpp == PiecePriorityNone {
return cn.stopRequestingPiece(piece)
}
prio := cn.getPieceInclination()[piece]
switch cn.t.requestStrategy {
case 1:
switch tpp {
case PiecePriorityNormal:
case PiecePriorityReadahead:
prio -= int(cn.t.numPieces())
case PiecePriorityNext, PiecePriorityNow:
prio -= 2 * int(cn.t.numPieces())
default:
panic(tpp)
}
prio += int(piece / 3)
default:
}
return cn.pieceRequestOrder.Set(bitmap.BitIndex(piece), prio) || cn.shouldRequestWithoutBias()
} | [
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] | // This is distinct from Torrent piece priority, which is the user's
// preference. Connection piece priority is specific to a connection and is
// used to pseudorandomly avoid connections always requesting the same pieces
// and thus wasting effort. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L819-L843 | train |
anacrolix/torrent | connection.go | postHandshakeStats | func (cn *connection) postHandshakeStats(f func(*ConnStats)) {
t := cn.t
f(&t.stats)
f(&t.cl.stats)
} | go | func (cn *connection) postHandshakeStats(f func(*ConnStats)) {
t := cn.t
f(&t.stats)
f(&t.cl.stats)
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L962-L966 | train |
anacrolix/torrent | connection.go | allStats | func (cn *connection) allStats(f func(*ConnStats)) {
f(&cn.stats)
if cn.reconciledHandshakeStats {
cn.postHandshakeStats(f)
}
} | go | func (cn *connection) allStats(f func(*ConnStats)) {
f(&cn.stats)
if cn.reconciledHandshakeStats {
cn.postHandshakeStats(f)
}
} | [
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] | // All ConnStats that include this connection. Some objects are not known
// until the handshake is complete, after which it's expected to reconcile the
// differences. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L971-L976 | train |
anacrolix/torrent | connection.go | useful | func (c *connection) useful() bool {
t := c.t
if c.closed.IsSet() {
return false
}
if !t.haveInfo() {
return c.supportsExtension("ut_metadata")
}
if t.seeding() && c.PeerInterested {
return true
}
if c.peerHasWantedPieces() {
return true
}
return false
} | go | func (c *connection) useful() bool {
t := c.t
if c.closed.IsSet() {
return false
}
if !t.haveInfo() {
return c.supportsExtension("ut_metadata")
}
if t.seeding() && c.PeerInterested {
return true
}
if c.peerHasWantedPieces() {
return true
}
return false
} | [
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] | // Returns whether the connection could be useful to us. We're seeding and
// they want data, we don't have metainfo and they can provide it, etc. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L988-L1003 | train |
anacrolix/torrent | connection.go | setRW | func (cn *connection) setRW(rw io.ReadWriter) {
cn.r = rw
cn.w = rw
} | go | func (cn *connection) setRW(rw io.ReadWriter) {
cn.r = rw
cn.w = rw
} | [
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] | // Set both the Reader and Writer for the connection from a single ReadWriter. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L1253-L1256 | train |
anacrolix/torrent | connection.go | rw | func (cn *connection) rw() io.ReadWriter {
return struct {
io.Reader
io.Writer
}{cn.r, cn.w}
} | go | func (cn *connection) rw() io.ReadWriter {
return struct {
io.Reader
io.Writer
}{cn.r, cn.w}
} | [
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] | // Returns the Reader and Writer as a combined ReadWriter. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L1259-L1264 | train |
anacrolix/torrent | connection.go | upload | func (c *connection) upload(msg func(pp.Message) bool) bool {
// Breaking or completing this loop means we don't want to upload to the
// peer anymore, and we choke them.
another:
for c.uploadAllowed() {
// We want to upload to the peer.
if !c.Unchoke(msg) {
return false
}
for r := range c.PeerRequests {
res := c.t.cl.config.UploadRateLimiter.ReserveN(time.Now(), int(r.Length))
if !res.OK() {
panic(fmt.Sprintf("upload rate limiter burst size < %d", r.Length))
}
delay := res.Delay()
if delay > 0 {
res.Cancel()
c.setRetryUploadTimer(delay)
// Hard to say what to return here.
return true
}
more, err := c.sendChunk(r, msg)
if err != nil {
i := pieceIndex(r.Index)
if c.t.pieceComplete(i) {
c.t.updatePieceCompletion(i)
if !c.t.pieceComplete(i) {
// We had the piece, but not anymore.
break another
}
}
log.Str("error sending chunk to peer").AddValues(c, r, err).Log(c.t.logger)
// If we failed to send a chunk, choke the peer to ensure they
// flush all their requests. We've probably dropped a piece,
// but there's no way to communicate this to the peer. If they
// ask for it again, we'll kick them to allow us to send them
// an updated bitfield.
break another
}
delete(c.PeerRequests, r)
if !more {
return false
}
goto another
}
return true
}
return c.Choke(msg)
} | go | func (c *connection) upload(msg func(pp.Message) bool) bool {
// Breaking or completing this loop means we don't want to upload to the
// peer anymore, and we choke them.
another:
for c.uploadAllowed() {
// We want to upload to the peer.
if !c.Unchoke(msg) {
return false
}
for r := range c.PeerRequests {
res := c.t.cl.config.UploadRateLimiter.ReserveN(time.Now(), int(r.Length))
if !res.OK() {
panic(fmt.Sprintf("upload rate limiter burst size < %d", r.Length))
}
delay := res.Delay()
if delay > 0 {
res.Cancel()
c.setRetryUploadTimer(delay)
// Hard to say what to return here.
return true
}
more, err := c.sendChunk(r, msg)
if err != nil {
i := pieceIndex(r.Index)
if c.t.pieceComplete(i) {
c.t.updatePieceCompletion(i)
if !c.t.pieceComplete(i) {
// We had the piece, but not anymore.
break another
}
}
log.Str("error sending chunk to peer").AddValues(c, r, err).Log(c.t.logger)
// If we failed to send a chunk, choke the peer to ensure they
// flush all their requests. We've probably dropped a piece,
// but there's no way to communicate this to the peer. If they
// ask for it again, we'll kick them to allow us to send them
// an updated bitfield.
break another
}
delete(c.PeerRequests, r)
if !more {
return false
}
goto another
}
return true
}
return c.Choke(msg)
} | [
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] | // Also handles choking and unchoking of the remote peer. | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/connection.go#L1400-L1448 | train |
anacrolix/torrent | iplist/iplist.go | Lookup | func (ipl *IPList) Lookup(ip net.IP) (r Range, ok bool) {
if ipl == nil {
return
}
// TODO: Perhaps all addresses should be converted to IPv6, if the future
// of IP is to always be backwards compatible. But this will cost 4x the
// memory for IPv4 addresses?
v4 := ip.To4()
if v4 != nil {
r, ok = ipl.lookup(v4)
if ok {
return
}
}
v6 := ip.To16()
if v6 != nil {
return ipl.lookup(v6)
}
if v4 == nil && v6 == nil {
r = Range{
Description: "bad IP",
}
ok = true
}
return
} | go | func (ipl *IPList) Lookup(ip net.IP) (r Range, ok bool) {
if ipl == nil {
return
}
// TODO: Perhaps all addresses should be converted to IPv6, if the future
// of IP is to always be backwards compatible. But this will cost 4x the
// memory for IPv4 addresses?
v4 := ip.To4()
if v4 != nil {
r, ok = ipl.lookup(v4)
if ok {
return
}
}
v6 := ip.To16()
if v6 != nil {
return ipl.lookup(v6)
}
if v4 == nil && v6 == nil {
r = Range{
Description: "bad IP",
}
ok = true
}
return
} | [
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] | // Return the range the given IP is in. ok if false if no range is found. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/iplist/iplist.go#L53-L78 | train |
anacrolix/torrent | iplist/iplist.go | lookup | func lookup(
first func(i int) net.IP,
full func(i int) Range,
n int,
ip net.IP,
) (
r Range, ok bool,
) {
// Find the index of the first range for which the following range exceeds
// it.
i := sort.Search(n, func(i int) bool {
if i+1 >= n {
return true
}
return bytes.Compare(ip, first(i+1)) < 0
})
if i == n {
return
}
r = full(i)
ok = bytes.Compare(r.First, ip) <= 0 && bytes.Compare(ip, r.Last) <= 0
return
} | go | func lookup(
first func(i int) net.IP,
full func(i int) Range,
n int,
ip net.IP,
) (
r Range, ok bool,
) {
// Find the index of the first range for which the following range exceeds
// it.
i := sort.Search(n, func(i int) bool {
if i+1 >= n {
return true
}
return bytes.Compare(ip, first(i+1)) < 0
})
if i == n {
return
}
r = full(i)
ok = bytes.Compare(r.First, ip) <= 0 && bytes.Compare(ip, r.Last) <= 0
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/iplist/iplist.go#L81-L103 | train |
anacrolix/torrent | iplist/iplist.go | lookup | func (ipl *IPList) lookup(ip net.IP) (Range, bool) {
return lookup(func(i int) net.IP {
return ipl.ranges[i].First
}, func(i int) Range {
return ipl.ranges[i]
}, len(ipl.ranges), ip)
} | go | func (ipl *IPList) lookup(ip net.IP) (Range, bool) {
return lookup(func(i int) net.IP {
return ipl.ranges[i].First
}, func(i int) Range {
return ipl.ranges[i]
}, len(ipl.ranges), ip)
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/iplist/iplist.go#L106-L112 | train |
anacrolix/torrent | iplist/iplist.go | NewFromReader | func NewFromReader(f io.Reader) (ret *IPList, err error) {
var ranges []Range
// There's a lot of similar descriptions, so we maintain a pool and reuse
// them to reduce memory overhead.
uniqStrs := make(map[string]string)
scanner := bufio.NewScanner(f)
lineNum := 1
for scanner.Scan() {
r, ok, lineErr := ParseBlocklistP2PLine(scanner.Bytes())
if lineErr != nil {
err = fmt.Errorf("error parsing line %d: %s", lineNum, lineErr)
return
}
lineNum++
if !ok {
continue
}
if s, ok := uniqStrs[r.Description]; ok {
r.Description = s
} else {
uniqStrs[r.Description] = r.Description
}
ranges = append(ranges, r)
}
err = scanner.Err()
if err != nil {
return
}
ret = New(ranges)
return
} | go | func NewFromReader(f io.Reader) (ret *IPList, err error) {
var ranges []Range
// There's a lot of similar descriptions, so we maintain a pool and reuse
// them to reduce memory overhead.
uniqStrs := make(map[string]string)
scanner := bufio.NewScanner(f)
lineNum := 1
for scanner.Scan() {
r, ok, lineErr := ParseBlocklistP2PLine(scanner.Bytes())
if lineErr != nil {
err = fmt.Errorf("error parsing line %d: %s", lineNum, lineErr)
return
}
lineNum++
if !ok {
continue
}
if s, ok := uniqStrs[r.Description]; ok {
r.Description = s
} else {
uniqStrs[r.Description] = r.Description
}
ranges = append(ranges, r)
}
err = scanner.Err()
if err != nil {
return
}
ret = New(ranges)
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/iplist/iplist.go#L155-L185 | train |
anacrolix/torrent | bencode/api.go | Unmarshal | func Unmarshal(data []byte, v interface{}) (err error) {
buf := bytes.NewBuffer(data)
e := Decoder{r: buf}
err = e.Decode(v)
if err == nil && buf.Len() != 0 {
err = ErrUnusedTrailingBytes{buf.Len()}
}
return
} | go | func Unmarshal(data []byte, v interface{}) (err error) {
buf := bytes.NewBuffer(data)
e := Decoder{r: buf}
err = e.Decode(v)
if err == nil && buf.Len() != 0 {
err = ErrUnusedTrailingBytes{buf.Len()}
}
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/bencode/api.go#L133-L141 | train |
anacrolix/torrent | reader.go | SetResponsive | func (r *reader) SetResponsive() {
r.responsive = true
r.t.cl.event.Broadcast()
} | go | func (r *reader) SetResponsive() {
r.responsive = true
r.t.cl.event.Broadcast()
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/reader.go#L54-L57 | train |
anacrolix/torrent | reader.go | SetReadahead | func (r *reader) SetReadahead(readahead int64) {
r.mu.Lock()
r.readahead = readahead
r.mu.Unlock()
r.t.cl.lock()
defer r.t.cl.unlock()
r.posChanged()
} | go | func (r *reader) SetReadahead(readahead int64) {
r.mu.Lock()
r.readahead = readahead
r.mu.Unlock()
r.t.cl.lock()
defer r.t.cl.unlock()
r.posChanged()
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/reader.go#L67-L74 | train |
anacrolix/torrent | reader.go | available | func (r *reader) available(off, max int64) (ret int64) {
off += r.offset
for max > 0 {
req, ok := r.t.offsetRequest(off)
if !ok {
break
}
if !r.t.haveChunk(req) {
break
}
len1 := int64(req.Length) - (off - r.t.requestOffset(req))
max -= len1
ret += len1
off += len1
}
// Ensure that ret hasn't exceeded our original max.
if max < 0 {
ret += max
}
return
} | go | func (r *reader) available(off, max int64) (ret int64) {
off += r.offset
for max > 0 {
req, ok := r.t.offsetRequest(off)
if !ok {
break
}
if !r.t.haveChunk(req) {
break
}
len1 := int64(req.Length) - (off - r.t.requestOffset(req))
max -= len1
ret += len1
off += len1
}
// Ensure that ret hasn't exceeded our original max.
if max < 0 {
ret += max
}
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/reader.go#L91-L111 | train |
anacrolix/torrent | reader.go | piecesUncached | func (r *reader) piecesUncached() (ret pieceRange) {
ra := r.readahead
if ra < 1 {
// Needs to be at least 1, because [x, x) means we don't want
// anything.
ra = 1
}
if ra > r.length-r.pos {
ra = r.length - r.pos
}
ret.begin, ret.end = r.t.byteRegionPieces(r.torrentOffset(r.pos), ra)
return
} | go | func (r *reader) piecesUncached() (ret pieceRange) {
ra := r.readahead
if ra < 1 {
// Needs to be at least 1, because [x, x) means we don't want
// anything.
ra = 1
}
if ra > r.length-r.pos {
ra = r.length - r.pos
}
ret.begin, ret.end = r.t.byteRegionPieces(r.torrentOffset(r.pos), ra)
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/reader.go#L121-L133 | train |
anacrolix/torrent | reader.go | waitAvailable | func (r *reader) waitAvailable(pos, wanted int64, ctxErr *error) (avail int64) {
r.t.cl.lock()
defer r.t.cl.unlock()
for !r.readable(pos) && *ctxErr == nil {
r.waitReadable(pos)
}
return r.available(pos, wanted)
} | go | func (r *reader) waitAvailable(pos, wanted int64, ctxErr *error) (avail int64) {
r.t.cl.lock()
defer r.t.cl.unlock()
for !r.readable(pos) && *ctxErr == nil {
r.waitReadable(pos)
}
return r.available(pos, wanted)
} | [
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] | // Wait until some data should be available to read. Tickles the client if it
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/reader.go#L184-L191 | train |
anacrolix/torrent | reader.go | readOnceAt | func (r *reader) readOnceAt(b []byte, pos int64, ctxErr *error) (n int, err error) {
if pos >= r.length {
err = io.EOF
return
}
for {
avail := r.waitAvailable(pos, int64(len(b)), ctxErr)
if avail == 0 {
if r.t.closed.IsSet() {
err = errors.New("torrent closed")
return
}
if *ctxErr != nil {
err = *ctxErr
return
}
}
pi := pieceIndex(r.torrentOffset(pos) / r.t.info.PieceLength)
ip := r.t.info.Piece(pi)
po := r.torrentOffset(pos) % r.t.info.PieceLength
b1 := missinggo.LimitLen(b, ip.Length()-po, avail)
n, err = r.t.readAt(b1, r.torrentOffset(pos))
if n != 0 {
err = nil
return
}
r.t.cl.lock()
// TODO: Just reset pieces in the readahead window. This might help
// prevent thrashing with small caches and file and piece priorities.
log.Printf("error reading torrent %s piece %d offset %d, %d bytes: %v",
r.t.infoHash.HexString(), pi, po, len(b1), err)
if !r.t.updatePieceCompletion(pi) {
log.Printf("piece %d completion unchanged", pi)
}
r.t.cl.unlock()
}
} | go | func (r *reader) readOnceAt(b []byte, pos int64, ctxErr *error) (n int, err error) {
if pos >= r.length {
err = io.EOF
return
}
for {
avail := r.waitAvailable(pos, int64(len(b)), ctxErr)
if avail == 0 {
if r.t.closed.IsSet() {
err = errors.New("torrent closed")
return
}
if *ctxErr != nil {
err = *ctxErr
return
}
}
pi := pieceIndex(r.torrentOffset(pos) / r.t.info.PieceLength)
ip := r.t.info.Piece(pi)
po := r.torrentOffset(pos) % r.t.info.PieceLength
b1 := missinggo.LimitLen(b, ip.Length()-po, avail)
n, err = r.t.readAt(b1, r.torrentOffset(pos))
if n != 0 {
err = nil
return
}
r.t.cl.lock()
// TODO: Just reset pieces in the readahead window. This might help
// prevent thrashing with small caches and file and piece priorities.
log.Printf("error reading torrent %s piece %d offset %d, %d bytes: %v",
r.t.infoHash.HexString(), pi, po, len(b1), err)
if !r.t.updatePieceCompletion(pi) {
log.Printf("piece %d completion unchanged", pi)
}
r.t.cl.unlock()
}
} | [
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] | // Performs at most one successful read to torrent storage. | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/reader.go#L198-L234 | train |
anacrolix/torrent | tracker/udp.go | write | func (c *udpAnnounce) write(h *RequestHeader, body interface{}, trailer []byte) (err error) {
var buf bytes.Buffer
err = binary.Write(&buf, binary.BigEndian, h)
if err != nil {
panic(err)
}
if body != nil {
err = binary.Write(&buf, binary.BigEndian, body)
if err != nil {
panic(err)
}
}
_, err = buf.Write(trailer)
if err != nil {
return
}
n, err := c.socket.Write(buf.Bytes())
if err != nil {
return
}
if n != buf.Len() {
panic("write should send all or error")
}
return
} | go | func (c *udpAnnounce) write(h *RequestHeader, body interface{}, trailer []byte) (err error) {
var buf bytes.Buffer
err = binary.Write(&buf, binary.BigEndian, h)
if err != nil {
panic(err)
}
if body != nil {
err = binary.Write(&buf, binary.BigEndian, body)
if err != nil {
panic(err)
}
}
_, err = buf.Write(trailer)
if err != nil {
return
}
n, err := c.socket.Write(buf.Bytes())
if err != nil {
return
}
if n != buf.Len() {
panic("write should send all or error")
}
return
} | [
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] | // body is the binary serializable request body. trailer is optional data
// following it, such as for BEP 41. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/tracker/udp.go#L156-L180 | train |
anacrolix/torrent | tracker/udp.go | request | func (c *udpAnnounce) request(action Action, args interface{}, options []byte) (*bytes.Buffer, error) {
tid := newTransactionId()
if err := errors.Wrap(
c.write(
&RequestHeader{
ConnectionId: c.connectionId,
Action: action,
TransactionId: tid,
}, args, options),
"writing request",
); err != nil {
return nil, err
}
c.socket.SetReadDeadline(time.Now().Add(timeout(c.contiguousTimeouts)))
b := make([]byte, 0x800) // 2KiB
for {
var (
n int
readErr error
readDone = make(chan struct{})
)
go func() {
defer close(readDone)
n, readErr = c.socket.Read(b)
}()
ctx := c.a.Context
if ctx == nil {
ctx = context.Background()
}
select {
case <-ctx.Done():
return nil, ctx.Err()
case <-readDone:
}
if opE, ok := readErr.(*net.OpError); ok && opE.Timeout() {
c.contiguousTimeouts++
}
if readErr != nil {
return nil, errors.Wrap(readErr, "reading from socket")
}
buf := bytes.NewBuffer(b[:n])
var h ResponseHeader
err := binary.Read(buf, binary.BigEndian, &h)
switch err {
default:
panic(err)
case io.ErrUnexpectedEOF, io.EOF:
continue
case nil:
}
if h.TransactionId != tid {
continue
}
c.contiguousTimeouts = 0
if h.Action == ActionError {
err = errors.New(buf.String())
}
return buf, err
}
} | go | func (c *udpAnnounce) request(action Action, args interface{}, options []byte) (*bytes.Buffer, error) {
tid := newTransactionId()
if err := errors.Wrap(
c.write(
&RequestHeader{
ConnectionId: c.connectionId,
Action: action,
TransactionId: tid,
}, args, options),
"writing request",
); err != nil {
return nil, err
}
c.socket.SetReadDeadline(time.Now().Add(timeout(c.contiguousTimeouts)))
b := make([]byte, 0x800) // 2KiB
for {
var (
n int
readErr error
readDone = make(chan struct{})
)
go func() {
defer close(readDone)
n, readErr = c.socket.Read(b)
}()
ctx := c.a.Context
if ctx == nil {
ctx = context.Background()
}
select {
case <-ctx.Done():
return nil, ctx.Err()
case <-readDone:
}
if opE, ok := readErr.(*net.OpError); ok && opE.Timeout() {
c.contiguousTimeouts++
}
if readErr != nil {
return nil, errors.Wrap(readErr, "reading from socket")
}
buf := bytes.NewBuffer(b[:n])
var h ResponseHeader
err := binary.Read(buf, binary.BigEndian, &h)
switch err {
default:
panic(err)
case io.ErrUnexpectedEOF, io.EOF:
continue
case nil:
}
if h.TransactionId != tid {
continue
}
c.contiguousTimeouts = 0
if h.Action == ActionError {
err = errors.New(buf.String())
}
return buf, err
}
} | [
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] | // args is the binary serializable request body. trailer is optional data
// following it, such as for BEP 41. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/tracker/udp.go#L192-L251 | train |
anacrolix/torrent | misc.go | metadataPieceSize | func metadataPieceSize(totalSize int, piece int) int {
ret := totalSize - piece*(1<<14)
if ret > 1<<14 {
ret = 1 << 14
}
return ret
} | go | func metadataPieceSize(totalSize int, piece int) int {
ret := totalSize - piece*(1<<14)
if ret > 1<<14 {
ret = 1 << 14
}
return ret
} | [
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] | // The size in bytes of a metadata extension piece. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/misc.go#L47-L53 | train |
anacrolix/torrent | misc.go | torrentOffsetRequest | func torrentOffsetRequest(torrentLength, pieceSize, chunkSize, offset int64) (
r request, ok bool) {
if offset < 0 || offset >= torrentLength {
return
}
r.Index = pp.Integer(offset / pieceSize)
r.Begin = pp.Integer(offset % pieceSize / chunkSize * chunkSize)
r.Length = pp.Integer(chunkSize)
pieceLeft := pp.Integer(pieceSize - int64(r.Begin))
if r.Length > pieceLeft {
r.Length = pieceLeft
}
torrentLeft := torrentLength - int64(r.Index)*pieceSize - int64(r.Begin)
if int64(r.Length) > torrentLeft {
r.Length = pp.Integer(torrentLeft)
}
ok = true
return
} | go | func torrentOffsetRequest(torrentLength, pieceSize, chunkSize, offset int64) (
r request, ok bool) {
if offset < 0 || offset >= torrentLength {
return
}
r.Index = pp.Integer(offset / pieceSize)
r.Begin = pp.Integer(offset % pieceSize / chunkSize * chunkSize)
r.Length = pp.Integer(chunkSize)
pieceLeft := pp.Integer(pieceSize - int64(r.Begin))
if r.Length > pieceLeft {
r.Length = pieceLeft
}
torrentLeft := torrentLength - int64(r.Index)*pieceSize - int64(r.Begin)
if int64(r.Length) > torrentLeft {
r.Length = pp.Integer(torrentLeft)
}
ok = true
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/misc.go#L56-L74 | train |
anacrolix/torrent | peer_protocol/handshake.go | Handshake | func Handshake(sock io.ReadWriter, ih *metainfo.Hash, peerID [20]byte, extensions PeerExtensionBits) (res HandshakeResult, ok bool, err error) {
// Bytes to be sent to the peer. Should never block the sender.
postCh := make(chan []byte, 4)
// A single error value sent when the writer completes.
writeDone := make(chan error, 1)
// Performs writes to the socket and ensures posts don't block.
go handshakeWriter(sock, postCh, writeDone)
defer func() {
close(postCh) // Done writing.
if !ok {
return
}
if err != nil {
panic(err)
}
// Wait until writes complete before returning from handshake.
err = <-writeDone
if err != nil {
err = fmt.Errorf("error writing: %s", err)
}
}()
post := func(bb []byte) {
select {
case postCh <- bb:
default:
panic("mustn't block while posting")
}
}
post([]byte(Protocol))
post(extensions[:])
if ih != nil { // We already know what we want.
post(ih[:])
post(peerID[:])
}
var b [68]byte
_, err = io.ReadFull(sock, b[:68])
if err != nil {
err = nil
return
}
if string(b[:20]) != Protocol {
return
}
missinggo.CopyExact(&res.PeerExtensionBits, b[20:28])
missinggo.CopyExact(&res.Hash, b[28:48])
missinggo.CopyExact(&res.PeerID, b[48:68])
// peerExtensions.Add(res.PeerExtensionBits.String(), 1)
// TODO: Maybe we can just drop peers here if we're not interested. This
// could prevent them trying to reconnect, falsely believing there was
// just a problem.
if ih == nil { // We were waiting for the peer to tell us what they wanted.
post(res.Hash[:])
post(peerID[:])
}
ok = true
return
} | go | func Handshake(sock io.ReadWriter, ih *metainfo.Hash, peerID [20]byte, extensions PeerExtensionBits) (res HandshakeResult, ok bool, err error) {
// Bytes to be sent to the peer. Should never block the sender.
postCh := make(chan []byte, 4)
// A single error value sent when the writer completes.
writeDone := make(chan error, 1)
// Performs writes to the socket and ensures posts don't block.
go handshakeWriter(sock, postCh, writeDone)
defer func() {
close(postCh) // Done writing.
if !ok {
return
}
if err != nil {
panic(err)
}
// Wait until writes complete before returning from handshake.
err = <-writeDone
if err != nil {
err = fmt.Errorf("error writing: %s", err)
}
}()
post := func(bb []byte) {
select {
case postCh <- bb:
default:
panic("mustn't block while posting")
}
}
post([]byte(Protocol))
post(extensions[:])
if ih != nil { // We already know what we want.
post(ih[:])
post(peerID[:])
}
var b [68]byte
_, err = io.ReadFull(sock, b[:68])
if err != nil {
err = nil
return
}
if string(b[:20]) != Protocol {
return
}
missinggo.CopyExact(&res.PeerExtensionBits, b[20:28])
missinggo.CopyExact(&res.Hash, b[28:48])
missinggo.CopyExact(&res.PeerID, b[48:68])
// peerExtensions.Add(res.PeerExtensionBits.String(), 1)
// TODO: Maybe we can just drop peers here if we're not interested. This
// could prevent them trying to reconnect, falsely believing there was
// just a problem.
if ih == nil { // We were waiting for the peer to tell us what they wanted.
post(res.Hash[:])
post(peerID[:])
}
ok = true
return
} | [
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] | // ih is nil if we expect the peer to declare the InfoHash, such as when the
// peer initiated the connection. Returns ok if the Handshake was successful,
// and err if there was an unexpected condition other than the peer simply
// abandoning the Handshake. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/peer_protocol/handshake.go#L76-L137 | train |
anacrolix/torrent | bencode/decode.go | readUntil | func (d *Decoder) readUntil(sep byte) {
for {
b := d.readByte()
if b == sep {
return
}
d.buf.WriteByte(b)
}
} | go | func (d *Decoder) readUntil(sep byte) {
for {
b := d.readByte()
if b == sep {
return
}
d.buf.WriteByte(b)
}
} | [
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// is consumed, but not included into the 'd.buf' | [
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anacrolix/torrent | bencode/decode.go | parseInt | func (d *Decoder) parseInt(v reflect.Value) {
start := d.Offset - 1
d.readUntil('e')
if d.buf.Len() == 0 {
panic(&SyntaxError{
Offset: start,
What: errors.New("empty integer value"),
})
}
s := bytesAsString(d.buf.Bytes())
switch v.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
n, err := strconv.ParseInt(s, 10, 64)
checkForIntParseError(err, start)
if v.OverflowInt(n) {
panic(&UnmarshalTypeError{
Value: "integer " + s,
Type: v.Type(),
})
}
v.SetInt(n)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
n, err := strconv.ParseUint(s, 10, 64)
checkForIntParseError(err, start)
if v.OverflowUint(n) {
panic(&UnmarshalTypeError{
Value: "integer " + s,
Type: v.Type(),
})
}
v.SetUint(n)
case reflect.Bool:
v.SetBool(s != "0")
default:
panic(&UnmarshalTypeError{
Value: "integer " + s,
Type: v.Type(),
})
}
d.buf.Reset()
} | go | func (d *Decoder) parseInt(v reflect.Value) {
start := d.Offset - 1
d.readUntil('e')
if d.buf.Len() == 0 {
panic(&SyntaxError{
Offset: start,
What: errors.New("empty integer value"),
})
}
s := bytesAsString(d.buf.Bytes())
switch v.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
n, err := strconv.ParseInt(s, 10, 64)
checkForIntParseError(err, start)
if v.OverflowInt(n) {
panic(&UnmarshalTypeError{
Value: "integer " + s,
Type: v.Type(),
})
}
v.SetInt(n)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
n, err := strconv.ParseUint(s, 10, 64)
checkForIntParseError(err, start)
if v.OverflowUint(n) {
panic(&UnmarshalTypeError{
Value: "integer " + s,
Type: v.Type(),
})
}
v.SetUint(n)
case reflect.Bool:
v.SetBool(s != "0")
default:
panic(&UnmarshalTypeError{
Value: "integer " + s,
Type: v.Type(),
})
}
d.buf.Reset()
} | [
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] | // called when 'i' was consumed | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/bencode/decode.go#L105-L149 | train |
anacrolix/torrent | bencode/decode.go | getDictField | func getDictField(dict reflect.Value, key string) dictField {
// get valuev as a map value or as a struct field
switch dict.Kind() {
case reflect.Map:
value := reflect.New(dict.Type().Elem()).Elem()
return dictField{
Value: value,
Ok: true,
Set: func() {
if dict.IsNil() {
dict.Set(reflect.MakeMap(dict.Type()))
}
// Assigns the value into the map.
dict.SetMapIndex(reflect.ValueOf(key).Convert(dict.Type().Key()), value)
},
}
case reflect.Struct:
sf, ok := getStructFieldForKey(dict.Type(), key)
if !ok {
return dictField{}
}
if sf.r.PkgPath != "" {
panic(&UnmarshalFieldError{
Key: key,
Type: dict.Type(),
Field: sf.r,
})
}
return dictField{
Value: dict.FieldByIndex(sf.r.Index),
Ok: true,
Set: func() {},
IgnoreUnmarshalTypeError: sf.tag.IgnoreUnmarshalTypeError(),
}
default:
return dictField{}
}
} | go | func getDictField(dict reflect.Value, key string) dictField {
// get valuev as a map value or as a struct field
switch dict.Kind() {
case reflect.Map:
value := reflect.New(dict.Type().Elem()).Elem()
return dictField{
Value: value,
Ok: true,
Set: func() {
if dict.IsNil() {
dict.Set(reflect.MakeMap(dict.Type()))
}
// Assigns the value into the map.
dict.SetMapIndex(reflect.ValueOf(key).Convert(dict.Type().Key()), value)
},
}
case reflect.Struct:
sf, ok := getStructFieldForKey(dict.Type(), key)
if !ok {
return dictField{}
}
if sf.r.PkgPath != "" {
panic(&UnmarshalFieldError{
Key: key,
Type: dict.Type(),
Field: sf.r,
})
}
return dictField{
Value: dict.FieldByIndex(sf.r.Index),
Ok: true,
Set: func() {},
IgnoreUnmarshalTypeError: sf.tag.IgnoreUnmarshalTypeError(),
}
default:
return dictField{}
}
} | [
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] | // Returns specifics for parsing a dict field value. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/bencode/decode.go#L217-L254 | train |
anacrolix/torrent | bencode/decode.go | raiseUnknownValueType | func (d *Decoder) raiseUnknownValueType(b byte, offset int64) {
panic(&SyntaxError{
Offset: offset,
What: fmt.Errorf("unknown value type %+q", b),
})
} | go | func (d *Decoder) raiseUnknownValueType(b byte, offset int64) {
panic(&SyntaxError{
Offset: offset,
What: fmt.Errorf("unknown value type %+q", b),
})
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/bencode/decode.go#L520-L525 | train |
anacrolix/torrent | tracker_scraper.go | announce | func (me *trackerScraper) announce() (ret trackerAnnounceResult) {
defer func() {
ret.Completed = time.Now()
}()
ret.Interval = 5 * time.Minute
ip, err := me.getIp()
if err != nil {
ret.Err = fmt.Errorf("error getting ip: %s", err)
return
}
me.t.cl.lock()
req := me.t.announceRequest()
me.t.cl.unlock()
res, err := tracker.Announce{
HTTPProxy: me.t.cl.config.HTTPProxy,
UserAgent: me.t.cl.config.HTTPUserAgent,
TrackerUrl: me.trackerUrl(ip),
Request: req,
HostHeader: me.u.Host,
ServerName: me.u.Hostname(),
UdpNetwork: me.u.Scheme,
ClientIp4: krpc.NodeAddr{IP: me.t.cl.config.PublicIp4},
ClientIp6: krpc.NodeAddr{IP: me.t.cl.config.PublicIp6},
}.Do()
if err != nil {
ret.Err = fmt.Errorf("error announcing: %s", err)
return
}
me.t.AddPeers(Peers(nil).AppendFromTracker(res.Peers))
ret.NumPeers = len(res.Peers)
ret.Interval = time.Duration(res.Interval) * time.Second
return
} | go | func (me *trackerScraper) announce() (ret trackerAnnounceResult) {
defer func() {
ret.Completed = time.Now()
}()
ret.Interval = 5 * time.Minute
ip, err := me.getIp()
if err != nil {
ret.Err = fmt.Errorf("error getting ip: %s", err)
return
}
me.t.cl.lock()
req := me.t.announceRequest()
me.t.cl.unlock()
res, err := tracker.Announce{
HTTPProxy: me.t.cl.config.HTTPProxy,
UserAgent: me.t.cl.config.HTTPUserAgent,
TrackerUrl: me.trackerUrl(ip),
Request: req,
HostHeader: me.u.Host,
ServerName: me.u.Hostname(),
UdpNetwork: me.u.Scheme,
ClientIp4: krpc.NodeAddr{IP: me.t.cl.config.PublicIp4},
ClientIp6: krpc.NodeAddr{IP: me.t.cl.config.PublicIp6},
}.Do()
if err != nil {
ret.Err = fmt.Errorf("error announcing: %s", err)
return
}
me.t.AddPeers(Peers(nil).AppendFromTracker(res.Peers))
ret.NumPeers = len(res.Peers)
ret.Interval = time.Duration(res.Interval) * time.Second
return
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] | // Return how long to wait before trying again. For most errors, we return 5
// minutes, a relatively quick turn around for DNS changes. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/tracker_scraper.go#L99-L131 | train |
anacrolix/torrent | iplist/cidr.go | IPNetLast | func IPNetLast(in *net.IPNet) (last net.IP) {
n := len(in.IP)
if n != len(in.Mask) {
panic("wat")
}
last = make(net.IP, n)
for i := 0; i < n; i++ {
last[i] = in.IP[i] | ^in.Mask[i]
}
return
} | go | func IPNetLast(in *net.IPNet) (last net.IP) {
n := len(in.IP)
if n != len(in.Mask) {
panic("wat")
}
last = make(net.IP, n)
for i := 0; i < n; i++ {
last[i] = in.IP[i] | ^in.Mask[i]
}
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/iplist/cidr.go#L31-L41 | train |
anacrolix/torrent | bencode/encode.go | reflectMarshaler | func (e *Encoder) reflectMarshaler(v reflect.Value) bool {
if !v.Type().Implements(marshalerType) {
if v.Kind() != reflect.Ptr && v.CanAddr() && v.Addr().Type().Implements(marshalerType) {
v = v.Addr()
} else {
return false
}
}
m := v.Interface().(Marshaler)
data, err := m.MarshalBencode()
if err != nil {
panic(&MarshalerError{v.Type(), err})
}
e.write(data)
return true
} | go | func (e *Encoder) reflectMarshaler(v reflect.Value) bool {
if !v.Type().Implements(marshalerType) {
if v.Kind() != reflect.Ptr && v.CanAddr() && v.Addr().Type().Implements(marshalerType) {
v = v.Addr()
} else {
return false
}
}
m := v.Interface().(Marshaler)
data, err := m.MarshalBencode()
if err != nil {
panic(&MarshalerError{v.Type(), err})
}
e.write(data)
return true
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/bencode/encode.go#L82-L97 | train |
anacrolix/torrent | file.go | DisplayPath | func (f *File) DisplayPath() string {
fip := f.FileInfo().Path
if len(fip) == 0 {
return f.t.info.Name
}
return strings.Join(fip, "/")
} | go | func (f *File) DisplayPath() string {
fip := f.FileInfo().Path
if len(fip) == 0 {
return f.t.info.Name
}
return strings.Join(fip, "/")
} | [
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anacrolix/torrent | file.go | State | func (f *File) State() (ret []FilePieceState) {
f.t.cl.rLock()
defer f.t.cl.rUnlock()
pieceSize := int64(f.t.usualPieceSize())
off := f.offset % pieceSize
remaining := f.length
for i := pieceIndex(f.offset / pieceSize); ; i++ {
if remaining == 0 {
break
}
len1 := pieceSize - off
if len1 > remaining {
len1 = remaining
}
ps := f.t.pieceState(i)
ret = append(ret, FilePieceState{len1, ps})
off = 0
remaining -= len1
}
return
} | go | func (f *File) State() (ret []FilePieceState) {
f.t.cl.rLock()
defer f.t.cl.rUnlock()
pieceSize := int64(f.t.usualPieceSize())
off := f.offset % pieceSize
remaining := f.length
for i := pieceIndex(f.offset / pieceSize); ; i++ {
if remaining == 0 {
break
}
len1 := pieceSize - off
if len1 > remaining {
len1 = remaining
}
ps := f.t.pieceState(i)
ret = append(ret, FilePieceState{len1, ps})
off = 0
remaining -= len1
}
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/file.go#L61-L81 | train |
anacrolix/torrent | file.go | SetPriority | func (f *File) SetPriority(prio piecePriority) {
f.t.cl.lock()
defer f.t.cl.unlock()
if prio == f.prio {
return
}
f.prio = prio
f.t.updatePiecePriorities(f.firstPieceIndex(), f.endPieceIndex())
} | go | func (f *File) SetPriority(prio piecePriority) {
f.t.cl.lock()
defer f.t.cl.unlock()
if prio == f.prio {
return
}
f.prio = prio
f.t.updatePiecePriorities(f.firstPieceIndex(), f.endPieceIndex())
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/file.go#L112-L120 | train |
anacrolix/torrent | file.go | Priority | func (f *File) Priority() piecePriority {
f.t.cl.lock()
defer f.t.cl.unlock()
return f.prio
} | go | func (f *File) Priority() piecePriority {
f.t.cl.lock()
defer f.t.cl.unlock()
return f.prio
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/file.go#L123-L127 | train |
anacrolix/torrent | client.go | WriteStatus | func (cl *Client) WriteStatus(_w io.Writer) {
cl.rLock()
defer cl.rUnlock()
w := bufio.NewWriter(_w)
defer w.Flush()
fmt.Fprintf(w, "Listen port: %d\n", cl.LocalPort())
fmt.Fprintf(w, "Peer ID: %+q\n", cl.PeerID())
fmt.Fprintf(w, "Announce key: %x\n", cl.announceKey())
fmt.Fprintf(w, "Banned IPs: %d\n", len(cl.badPeerIPsLocked()))
cl.eachDhtServer(func(s *dht.Server) {
fmt.Fprintf(w, "%s DHT server at %s:\n", s.Addr().Network(), s.Addr().String())
writeDhtServerStatus(w, s)
})
spew.Fdump(w, cl.stats)
fmt.Fprintf(w, "# Torrents: %d\n", len(cl.torrentsAsSlice()))
fmt.Fprintln(w)
for _, t := range slices.Sort(cl.torrentsAsSlice(), func(l, r *Torrent) bool {
return l.InfoHash().AsString() < r.InfoHash().AsString()
}).([]*Torrent) {
if t.name() == "" {
fmt.Fprint(w, "<unknown name>")
} else {
fmt.Fprint(w, t.name())
}
fmt.Fprint(w, "\n")
if t.info != nil {
fmt.Fprintf(w, "%f%% of %d bytes (%s)", 100*(1-float64(t.bytesMissingLocked())/float64(t.info.TotalLength())), t.length, humanize.Bytes(uint64(t.info.TotalLength())))
} else {
w.WriteString("<missing metainfo>")
}
fmt.Fprint(w, "\n")
t.writeStatus(w)
fmt.Fprintln(w)
}
} | go | func (cl *Client) WriteStatus(_w io.Writer) {
cl.rLock()
defer cl.rUnlock()
w := bufio.NewWriter(_w)
defer w.Flush()
fmt.Fprintf(w, "Listen port: %d\n", cl.LocalPort())
fmt.Fprintf(w, "Peer ID: %+q\n", cl.PeerID())
fmt.Fprintf(w, "Announce key: %x\n", cl.announceKey())
fmt.Fprintf(w, "Banned IPs: %d\n", len(cl.badPeerIPsLocked()))
cl.eachDhtServer(func(s *dht.Server) {
fmt.Fprintf(w, "%s DHT server at %s:\n", s.Addr().Network(), s.Addr().String())
writeDhtServerStatus(w, s)
})
spew.Fdump(w, cl.stats)
fmt.Fprintf(w, "# Torrents: %d\n", len(cl.torrentsAsSlice()))
fmt.Fprintln(w)
for _, t := range slices.Sort(cl.torrentsAsSlice(), func(l, r *Torrent) bool {
return l.InfoHash().AsString() < r.InfoHash().AsString()
}).([]*Torrent) {
if t.name() == "" {
fmt.Fprint(w, "<unknown name>")
} else {
fmt.Fprint(w, t.name())
}
fmt.Fprint(w, "\n")
if t.info != nil {
fmt.Fprintf(w, "%f%% of %d bytes (%s)", 100*(1-float64(t.bytesMissingLocked())/float64(t.info.TotalLength())), t.length, humanize.Bytes(uint64(t.info.TotalLength())))
} else {
w.WriteString("<missing metainfo>")
}
fmt.Fprint(w, "\n")
t.writeStatus(w)
fmt.Fprintln(w)
}
} | [
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] | // Writes out a human readable status of the client, such as for writing to a
// HTTP status page. | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L118-L152 | train |
anacrolix/torrent | client.go | Close | func (cl *Client) Close() {
cl.lock()
defer cl.unlock()
cl.closed.Set()
cl.eachDhtServer(func(s *dht.Server) { s.Close() })
cl.closeSockets()
for _, t := range cl.torrents {
t.close()
}
for _, f := range cl.onClose {
f()
}
cl.event.Broadcast()
} | go | func (cl *Client) Close() {
cl.lock()
defer cl.unlock()
cl.closed.Set()
cl.eachDhtServer(func(s *dht.Server) { s.Close() })
cl.closeSockets()
for _, t := range cl.torrents {
t.close()
}
for _, f := range cl.onClose {
f()
}
cl.event.Broadcast()
} | [
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] | // Stops the client. All connections to peers are closed and all activity will
// come to a halt. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L352-L365 | train |
anacrolix/torrent | client.go | Torrent | func (cl *Client) Torrent(ih metainfo.Hash) (t *Torrent, ok bool) {
cl.lock()
defer cl.unlock()
t, ok = cl.torrents[ih]
return
} | go | func (cl *Client) Torrent(ih metainfo.Hash) (t *Torrent, ok bool) {
cl.lock()
defer cl.unlock()
t, ok = cl.torrents[ih]
return
} | [
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] | // Returns a handle to the given torrent, if it's present in the client. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L465-L470 | train |
anacrolix/torrent | client.go | dopplegangerAddr | func (cl *Client) dopplegangerAddr(addr string) bool {
_, ok := cl.dopplegangerAddrs[addr]
return ok
} | go | func (cl *Client) dopplegangerAddr(addr string) bool {
_, ok := cl.dopplegangerAddrs[addr]
return ok
} | [
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] | // Returns whether an address is known to connect to a client with our own ID. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L498-L501 | train |
anacrolix/torrent | client.go | dialFirst | func (cl *Client) dialFirst(ctx context.Context, addr string) dialResult {
ctx, cancel := context.WithCancel(ctx)
// As soon as we return one connection, cancel the others.
defer cancel()
left := 0
resCh := make(chan dialResult, left)
func() {
cl.lock()
defer cl.unlock()
cl.eachListener(func(s socket) bool {
network := s.Addr().Network()
if peerNetworkEnabled(parseNetworkString(network), cl.config) {
left++
go func() {
cte := cl.config.ConnTracker.Wait(
ctx,
conntrack.Entry{network, s.Addr().String(), addr},
"dial torrent client",
0,
)
// Try to avoid committing to a dial if the context is complete as it's
// difficult to determine which dial errors allow us to forget the connection
// tracking entry handle.
if ctx.Err() != nil {
if cte != nil {
cte.Forget()
}
resCh <- dialResult{}
return
}
c, err := s.dial(ctx, addr)
// This is a bit optimistic, but it looks non-trivial to thread
// this through the proxy code. Set it now in case we close the
// connection forthwith.
if tc, ok := c.(*net.TCPConn); ok {
tc.SetLinger(0)
}
countDialResult(err)
dr := dialResult{c, network}
if c == nil {
if err != nil && forgettableDialError(err) {
cte.Forget()
} else {
cte.Done()
}
} else {
dr.Conn = closeWrapper{c, func() error {
err := c.Close()
cte.Done()
return err
}}
}
resCh <- dr
}()
}
return true
})
}()
var res dialResult
// Wait for a successful connection.
func() {
defer perf.ScopeTimer()()
for ; left > 0 && res.Conn == nil; left-- {
res = <-resCh
}
}()
// There are still incompleted dials.
go func() {
for ; left > 0; left-- {
conn := (<-resCh).Conn
if conn != nil {
conn.Close()
}
}
}()
if res.Conn != nil {
go torrent.Add(fmt.Sprintf("network dialed first: %s", res.Conn.RemoteAddr().Network()), 1)
}
return res
} | go | func (cl *Client) dialFirst(ctx context.Context, addr string) dialResult {
ctx, cancel := context.WithCancel(ctx)
// As soon as we return one connection, cancel the others.
defer cancel()
left := 0
resCh := make(chan dialResult, left)
func() {
cl.lock()
defer cl.unlock()
cl.eachListener(func(s socket) bool {
network := s.Addr().Network()
if peerNetworkEnabled(parseNetworkString(network), cl.config) {
left++
go func() {
cte := cl.config.ConnTracker.Wait(
ctx,
conntrack.Entry{network, s.Addr().String(), addr},
"dial torrent client",
0,
)
// Try to avoid committing to a dial if the context is complete as it's
// difficult to determine which dial errors allow us to forget the connection
// tracking entry handle.
if ctx.Err() != nil {
if cte != nil {
cte.Forget()
}
resCh <- dialResult{}
return
}
c, err := s.dial(ctx, addr)
// This is a bit optimistic, but it looks non-trivial to thread
// this through the proxy code. Set it now in case we close the
// connection forthwith.
if tc, ok := c.(*net.TCPConn); ok {
tc.SetLinger(0)
}
countDialResult(err)
dr := dialResult{c, network}
if c == nil {
if err != nil && forgettableDialError(err) {
cte.Forget()
} else {
cte.Done()
}
} else {
dr.Conn = closeWrapper{c, func() error {
err := c.Close()
cte.Done()
return err
}}
}
resCh <- dr
}()
}
return true
})
}()
var res dialResult
// Wait for a successful connection.
func() {
defer perf.ScopeTimer()()
for ; left > 0 && res.Conn == nil; left-- {
res = <-resCh
}
}()
// There are still incompleted dials.
go func() {
for ; left > 0; left-- {
conn := (<-resCh).Conn
if conn != nil {
conn.Close()
}
}
}()
if res.Conn != nil {
go torrent.Add(fmt.Sprintf("network dialed first: %s", res.Conn.RemoteAddr().Network()), 1)
}
return res
} | [
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] | // Returns a connection over UTP or TCP, whichever is first to connect. | [
"Returns",
"a",
"connection",
"over",
"UTP",
"or",
"TCP",
"whichever",
"is",
"first",
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L504-L583 | train |
anacrolix/torrent | client.go | outgoingConnection | func (cl *Client) outgoingConnection(t *Torrent, addr IpPort, ps peerSource) {
cl.dialRateLimiter.Wait(context.Background())
c, err := cl.establishOutgoingConn(t, addr)
cl.lock()
defer cl.unlock()
// Don't release lock between here and addConnection, unless it's for
// failure.
cl.noLongerHalfOpen(t, addr.String())
if err != nil {
if cl.config.Debug {
cl.logger.Printf("error establishing outgoing connection: %s", err)
}
return
}
if c == nil {
return
}
defer c.Close()
c.Discovery = ps
cl.runHandshookConn(c, t)
} | go | func (cl *Client) outgoingConnection(t *Torrent, addr IpPort, ps peerSource) {
cl.dialRateLimiter.Wait(context.Background())
c, err := cl.establishOutgoingConn(t, addr)
cl.lock()
defer cl.unlock()
// Don't release lock between here and addConnection, unless it's for
// failure.
cl.noLongerHalfOpen(t, addr.String())
if err != nil {
if cl.config.Debug {
cl.logger.Printf("error establishing outgoing connection: %s", err)
}
return
}
if c == nil {
return
}
defer c.Close()
c.Discovery = ps
cl.runHandshookConn(c, t)
} | [
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] | // Called to dial out and run a connection. The addr we're given is already
// considered half-open. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L672-L692 | train |
anacrolix/torrent | client.go | forSkeys | func (cl *Client) forSkeys(f func([]byte) bool) {
cl.lock()
defer cl.unlock()
for ih := range cl.torrents {
if !f(ih[:]) {
break
}
}
} | go | func (cl *Client) forSkeys(f func([]byte) bool) {
cl.lock()
defer cl.unlock()
for ih := range cl.torrents {
if !f(ih[:]) {
break
}
}
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L734-L742 | train |
anacrolix/torrent | client.go | receiveHandshakes | func (cl *Client) receiveHandshakes(c *connection) (t *Torrent, err error) {
defer perf.ScopeTimerErr(&err)()
var rw io.ReadWriter
rw, c.headerEncrypted, c.cryptoMethod, err = handleEncryption(c.rw(), cl.forSkeys, cl.config.EncryptionPolicy)
c.setRW(rw)
if err == nil || err == mse.ErrNoSecretKeyMatch {
if c.headerEncrypted {
torrent.Add("handshakes received encrypted", 1)
} else {
torrent.Add("handshakes received unencrypted", 1)
}
} else {
torrent.Add("handshakes received with error while handling encryption", 1)
}
if err != nil {
if err == mse.ErrNoSecretKeyMatch {
err = nil
}
return
}
if cl.config.ForceEncryption && !c.headerEncrypted {
err = errors.New("connection not encrypted")
return
}
ih, ok, err := cl.connBTHandshake(c, nil)
if err != nil {
err = fmt.Errorf("error during bt handshake: %s", err)
return
}
if !ok {
return
}
cl.lock()
t = cl.torrents[ih]
cl.unlock()
return
} | go | func (cl *Client) receiveHandshakes(c *connection) (t *Torrent, err error) {
defer perf.ScopeTimerErr(&err)()
var rw io.ReadWriter
rw, c.headerEncrypted, c.cryptoMethod, err = handleEncryption(c.rw(), cl.forSkeys, cl.config.EncryptionPolicy)
c.setRW(rw)
if err == nil || err == mse.ErrNoSecretKeyMatch {
if c.headerEncrypted {
torrent.Add("handshakes received encrypted", 1)
} else {
torrent.Add("handshakes received unencrypted", 1)
}
} else {
torrent.Add("handshakes received with error while handling encryption", 1)
}
if err != nil {
if err == mse.ErrNoSecretKeyMatch {
err = nil
}
return
}
if cl.config.ForceEncryption && !c.headerEncrypted {
err = errors.New("connection not encrypted")
return
}
ih, ok, err := cl.connBTHandshake(c, nil)
if err != nil {
err = fmt.Errorf("error during bt handshake: %s", err)
return
}
if !ok {
return
}
cl.lock()
t = cl.torrents[ih]
cl.unlock()
return
} | [
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] | // Do encryption and bittorrent handshakes as receiver. | [
"Do",
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"and",
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"handshakes",
"as",
"receiver",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L745-L781 | train |
anacrolix/torrent | client.go | connBTHandshake | func (cl *Client) connBTHandshake(c *connection, ih *metainfo.Hash) (ret metainfo.Hash, ok bool, err error) {
res, ok, err := pp.Handshake(c.rw(), ih, cl.peerID, cl.extensionBytes)
if err != nil || !ok {
return
}
ret = res.Hash
c.PeerExtensionBytes = res.PeerExtensionBits
c.PeerID = res.PeerID
c.completedHandshake = time.Now()
return
} | go | func (cl *Client) connBTHandshake(c *connection, ih *metainfo.Hash) (ret metainfo.Hash, ok bool, err error) {
res, ok, err := pp.Handshake(c.rw(), ih, cl.peerID, cl.extensionBytes)
if err != nil || !ok {
return
}
ret = res.Hash
c.PeerExtensionBytes = res.PeerExtensionBits
c.PeerID = res.PeerID
c.completedHandshake = time.Now()
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L784-L794 | train |
anacrolix/torrent | client.go | sendInitialMessages | func (cl *Client) sendInitialMessages(conn *connection, torrent *Torrent) {
if conn.PeerExtensionBytes.SupportsExtended() && cl.extensionBytes.SupportsExtended() {
conn.Post(pp.Message{
Type: pp.Extended,
ExtendedID: pp.HandshakeExtendedID,
ExtendedPayload: func() []byte {
msg := pp.ExtendedHandshakeMessage{
M: map[pp.ExtensionName]pp.ExtensionNumber{
pp.ExtensionNameMetadata: metadataExtendedId,
},
V: cl.config.ExtendedHandshakeClientVersion,
Reqq: 64, // TODO: Really?
YourIp: pp.CompactIp(conn.remoteAddr.IP),
Encryption: !cl.config.DisableEncryption,
Port: cl.incomingPeerPort(),
MetadataSize: torrent.metadataSize(),
// TODO: We can figured these out specific to the socket
// used.
Ipv4: pp.CompactIp(cl.config.PublicIp4.To4()),
Ipv6: cl.config.PublicIp6.To16(),
}
if !cl.config.DisablePEX {
msg.M[pp.ExtensionNamePex] = pexExtendedId
}
return bencode.MustMarshal(msg)
}(),
})
}
func() {
if conn.fastEnabled() {
if torrent.haveAllPieces() {
conn.Post(pp.Message{Type: pp.HaveAll})
conn.sentHaves.AddRange(0, bitmap.BitIndex(conn.t.NumPieces()))
return
} else if !torrent.haveAnyPieces() {
conn.Post(pp.Message{Type: pp.HaveNone})
conn.sentHaves.Clear()
return
}
}
conn.PostBitfield()
}()
if conn.PeerExtensionBytes.SupportsDHT() && cl.extensionBytes.SupportsDHT() && cl.haveDhtServer() {
conn.Post(pp.Message{
Type: pp.Port,
Port: cl.dhtPort(),
})
}
} | go | func (cl *Client) sendInitialMessages(conn *connection, torrent *Torrent) {
if conn.PeerExtensionBytes.SupportsExtended() && cl.extensionBytes.SupportsExtended() {
conn.Post(pp.Message{
Type: pp.Extended,
ExtendedID: pp.HandshakeExtendedID,
ExtendedPayload: func() []byte {
msg := pp.ExtendedHandshakeMessage{
M: map[pp.ExtensionName]pp.ExtensionNumber{
pp.ExtensionNameMetadata: metadataExtendedId,
},
V: cl.config.ExtendedHandshakeClientVersion,
Reqq: 64, // TODO: Really?
YourIp: pp.CompactIp(conn.remoteAddr.IP),
Encryption: !cl.config.DisableEncryption,
Port: cl.incomingPeerPort(),
MetadataSize: torrent.metadataSize(),
// TODO: We can figured these out specific to the socket
// used.
Ipv4: pp.CompactIp(cl.config.PublicIp4.To4()),
Ipv6: cl.config.PublicIp6.To16(),
}
if !cl.config.DisablePEX {
msg.M[pp.ExtensionNamePex] = pexExtendedId
}
return bencode.MustMarshal(msg)
}(),
})
}
func() {
if conn.fastEnabled() {
if torrent.haveAllPieces() {
conn.Post(pp.Message{Type: pp.HaveAll})
conn.sentHaves.AddRange(0, bitmap.BitIndex(conn.t.NumPieces()))
return
} else if !torrent.haveAnyPieces() {
conn.Post(pp.Message{Type: pp.HaveNone})
conn.sentHaves.Clear()
return
}
}
conn.PostBitfield()
}()
if conn.PeerExtensionBytes.SupportsDHT() && cl.extensionBytes.SupportsDHT() && cl.haveDhtServer() {
conn.Post(pp.Message{
Type: pp.Port,
Port: cl.dhtPort(),
})
}
} | [
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] | // See the order given in Transmission's tr_peerMsgsNew. | [
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"given",
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"Transmission",
"s",
"tr_peerMsgsNew",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L864-L912 | train |
anacrolix/torrent | client.go | gotMetadataExtensionMsg | func (cl *Client) gotMetadataExtensionMsg(payload []byte, t *Torrent, c *connection) error {
var d map[string]int
err := bencode.Unmarshal(payload, &d)
if _, ok := err.(bencode.ErrUnusedTrailingBytes); ok {
} else if err != nil {
return fmt.Errorf("error unmarshalling bencode: %s", err)
}
msgType, ok := d["msg_type"]
if !ok {
return errors.New("missing msg_type field")
}
piece := d["piece"]
switch msgType {
case pp.DataMetadataExtensionMsgType:
c.allStats(add(1, func(cs *ConnStats) *Count { return &cs.MetadataChunksRead }))
if !c.requestedMetadataPiece(piece) {
return fmt.Errorf("got unexpected piece %d", piece)
}
c.metadataRequests[piece] = false
begin := len(payload) - metadataPieceSize(d["total_size"], piece)
if begin < 0 || begin >= len(payload) {
return fmt.Errorf("data has bad offset in payload: %d", begin)
}
t.saveMetadataPiece(piece, payload[begin:])
c.lastUsefulChunkReceived = time.Now()
return t.maybeCompleteMetadata()
case pp.RequestMetadataExtensionMsgType:
if !t.haveMetadataPiece(piece) {
c.Post(t.newMetadataExtensionMessage(c, pp.RejectMetadataExtensionMsgType, d["piece"], nil))
return nil
}
start := (1 << 14) * piece
c.Post(t.newMetadataExtensionMessage(c, pp.DataMetadataExtensionMsgType, piece, t.metadataBytes[start:start+t.metadataPieceSize(piece)]))
return nil
case pp.RejectMetadataExtensionMsgType:
return nil
default:
return errors.New("unknown msg_type value")
}
} | go | func (cl *Client) gotMetadataExtensionMsg(payload []byte, t *Torrent, c *connection) error {
var d map[string]int
err := bencode.Unmarshal(payload, &d)
if _, ok := err.(bencode.ErrUnusedTrailingBytes); ok {
} else if err != nil {
return fmt.Errorf("error unmarshalling bencode: %s", err)
}
msgType, ok := d["msg_type"]
if !ok {
return errors.New("missing msg_type field")
}
piece := d["piece"]
switch msgType {
case pp.DataMetadataExtensionMsgType:
c.allStats(add(1, func(cs *ConnStats) *Count { return &cs.MetadataChunksRead }))
if !c.requestedMetadataPiece(piece) {
return fmt.Errorf("got unexpected piece %d", piece)
}
c.metadataRequests[piece] = false
begin := len(payload) - metadataPieceSize(d["total_size"], piece)
if begin < 0 || begin >= len(payload) {
return fmt.Errorf("data has bad offset in payload: %d", begin)
}
t.saveMetadataPiece(piece, payload[begin:])
c.lastUsefulChunkReceived = time.Now()
return t.maybeCompleteMetadata()
case pp.RequestMetadataExtensionMsgType:
if !t.haveMetadataPiece(piece) {
c.Post(t.newMetadataExtensionMessage(c, pp.RejectMetadataExtensionMsgType, d["piece"], nil))
return nil
}
start := (1 << 14) * piece
c.Post(t.newMetadataExtensionMessage(c, pp.DataMetadataExtensionMsgType, piece, t.metadataBytes[start:start+t.metadataPieceSize(piece)]))
return nil
case pp.RejectMetadataExtensionMsgType:
return nil
default:
return errors.New("unknown msg_type value")
}
} | [
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] | // Process incoming ut_metadata message. | [
"Process",
"incoming",
"ut_metadata",
"message",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L929-L968 | train |
anacrolix/torrent | client.go | newTorrent | func (cl *Client) newTorrent(ih metainfo.Hash, specStorage storage.ClientImpl) (t *Torrent) {
// use provided storage, if provided
storageClient := cl.defaultStorage
if specStorage != nil {
storageClient = storage.NewClient(specStorage)
}
t = &Torrent{
cl: cl,
infoHash: ih,
peers: prioritizedPeers{
om: btree.New(32),
getPrio: func(p Peer) peerPriority {
return bep40PriorityIgnoreError(cl.publicAddr(p.IP), p.addr())
},
},
conns: make(map[*connection]struct{}, 2*cl.config.EstablishedConnsPerTorrent),
halfOpen: make(map[string]Peer),
pieceStateChanges: pubsub.NewPubSub(),
storageOpener: storageClient,
maxEstablishedConns: cl.config.EstablishedConnsPerTorrent,
networkingEnabled: true,
requestStrategy: 2,
metadataChanged: sync.Cond{
L: cl.locker(),
},
duplicateRequestTimeout: 1 * time.Second,
}
t.logger = cl.logger.Clone().AddValue(t)
t.setChunkSize(defaultChunkSize)
return
} | go | func (cl *Client) newTorrent(ih metainfo.Hash, specStorage storage.ClientImpl) (t *Torrent) {
// use provided storage, if provided
storageClient := cl.defaultStorage
if specStorage != nil {
storageClient = storage.NewClient(specStorage)
}
t = &Torrent{
cl: cl,
infoHash: ih,
peers: prioritizedPeers{
om: btree.New(32),
getPrio: func(p Peer) peerPriority {
return bep40PriorityIgnoreError(cl.publicAddr(p.IP), p.addr())
},
},
conns: make(map[*connection]struct{}, 2*cl.config.EstablishedConnsPerTorrent),
halfOpen: make(map[string]Peer),
pieceStateChanges: pubsub.NewPubSub(),
storageOpener: storageClient,
maxEstablishedConns: cl.config.EstablishedConnsPerTorrent,
networkingEnabled: true,
requestStrategy: 2,
metadataChanged: sync.Cond{
L: cl.locker(),
},
duplicateRequestTimeout: 1 * time.Second,
}
t.logger = cl.logger.Clone().AddValue(t)
t.setChunkSize(defaultChunkSize)
return
} | [
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] | // Return a Torrent ready for insertion into a Client. | [
"Return",
"a",
"Torrent",
"ready",
"for",
"insertion",
"into",
"a",
"Client",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L987-L1021 | train |
anacrolix/torrent | client.go | AddTorrentInfoHashWithStorage | func (cl *Client) AddTorrentInfoHashWithStorage(infoHash metainfo.Hash, specStorage storage.ClientImpl) (t *Torrent, new bool) {
cl.lock()
defer cl.unlock()
t, ok := cl.torrents[infoHash]
if ok {
return
}
new = true
t = cl.newTorrent(infoHash, specStorage)
cl.eachDhtServer(func(s *dht.Server) {
go t.dhtAnnouncer(s)
})
cl.torrents[infoHash] = t
cl.clearAcceptLimits()
t.updateWantPeersEvent()
// Tickle Client.waitAccept, new torrent may want conns.
cl.event.Broadcast()
return
} | go | func (cl *Client) AddTorrentInfoHashWithStorage(infoHash metainfo.Hash, specStorage storage.ClientImpl) (t *Torrent, new bool) {
cl.lock()
defer cl.unlock()
t, ok := cl.torrents[infoHash]
if ok {
return
}
new = true
t = cl.newTorrent(infoHash, specStorage)
cl.eachDhtServer(func(s *dht.Server) {
go t.dhtAnnouncer(s)
})
cl.torrents[infoHash] = t
cl.clearAcceptLimits()
t.updateWantPeersEvent()
// Tickle Client.waitAccept, new torrent may want conns.
cl.event.Broadcast()
return
} | [
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] | // Adds a torrent by InfoHash with a custom Storage implementation.
// If the torrent already exists then this Storage is ignored and the
// existing torrent returned with `new` set to `false` | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L1038-L1057 | train |
anacrolix/torrent | client.go | WaitAll | func (cl *Client) WaitAll() bool {
cl.lock()
defer cl.unlock()
for !cl.allTorrentsCompleted() {
if cl.closed.IsSet() {
return false
}
cl.event.Wait()
}
return true
} | go | func (cl *Client) WaitAll() bool {
cl.lock()
defer cl.unlock()
for !cl.allTorrentsCompleted() {
if cl.closed.IsSet() {
return false
}
cl.event.Wait()
}
return true
} | [
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] | // Returns true when all torrents are completely downloaded and false if the
// client is stopped before that. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L1114-L1124 | train |
anacrolix/torrent | client.go | Torrents | func (cl *Client) Torrents() []*Torrent {
cl.lock()
defer cl.unlock()
return cl.torrentsAsSlice()
} | go | func (cl *Client) Torrents() []*Torrent {
cl.lock()
defer cl.unlock()
return cl.torrentsAsSlice()
} | [
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] | // Returns handles to all the torrents loaded in the Client. | [
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"the",
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"loaded",
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L1127-L1131 | train |
anacrolix/torrent | client.go | publicAddr | func (cl *Client) publicAddr(peer net.IP) IpPort {
return IpPort{cl.publicIp(peer), uint16(cl.incomingPeerPort())}
} | go | func (cl *Client) publicAddr(peer net.IP) IpPort {
return IpPort{cl.publicIp(peer), uint16(cl.incomingPeerPort())}
} | [
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")",
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"}",
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"}"
] | // Our IP as a peer should see it. | [
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"as",
"a",
"peer",
"should",
"see",
"it",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/client.go#L1277-L1279 | train |
anacrolix/torrent | mse/mse.go | postY | func (h *handshake) postY(x *big.Int) error {
var y big.Int
y.Exp(&g, x, &p)
return h.postWrite(paddedLeft(y.Bytes(), 96))
} | go | func (h *handshake) postY(x *big.Int) error {
var y big.Int
y.Exp(&g, x, &p)
return h.postWrite(paddedLeft(y.Bytes(), 96))
} | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/mse/mse.go#L175-L179 | train |
anacrolix/torrent | mse/mse.go | suffixMatchLen | func suffixMatchLen(a, b []byte) int {
if len(b) > len(a) {
b = b[:len(a)]
}
// i is how much of b to try to match
for i := len(b); i > 0; i-- {
// j is how many chars we've compared
j := 0
for ; j < i; j++ {
if b[i-1-j] != a[len(a)-1-j] {
goto shorter
}
}
return j
shorter:
}
return 0
} | go | func suffixMatchLen(a, b []byte) int {
if len(b) > len(a) {
b = b[:len(a)]
}
// i is how much of b to try to match
for i := len(b); i > 0; i-- {
// j is how many chars we've compared
j := 0
for ; j < i; j++ {
if b[i-1-j] != a[len(a)-1-j] {
goto shorter
}
}
return j
shorter:
}
return 0
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/mse/mse.go#L322-L339 | train |
anacrolix/torrent | mse/mse.go | readUntil | func readUntil(r io.Reader, b []byte) error {
b1 := make([]byte, len(b))
i := 0
for {
_, err := io.ReadFull(r, b1[i:])
if err != nil {
return err
}
i = suffixMatchLen(b1, b)
if i == len(b) {
break
}
if copy(b1, b1[len(b1)-i:]) != i {
panic("wat")
}
}
return nil
} | go | func readUntil(r io.Reader, b []byte) error {
b1 := make([]byte, len(b))
i := 0
for {
_, err := io.ReadFull(r, b1[i:])
if err != nil {
return err
}
i = suffixMatchLen(b1, b)
if i == len(b) {
break
}
if copy(b1, b1[len(b1)-i:]) != i {
panic("wat")
}
}
return nil
} | [
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// memory. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/mse/mse.go#L343-L360 | train |
anacrolix/torrent | tracker/peer.go | fromDictInterface | func (p *Peer) fromDictInterface(d map[string]interface{}) {
p.IP = net.ParseIP(d["ip"].(string))
if _, ok := d["peer id"]; ok {
p.ID = []byte(d["peer id"].(string))
}
p.Port = int(d["port"].(int64))
} | go | func (p *Peer) fromDictInterface(d map[string]interface{}) {
p.IP = net.ParseIP(d["ip"].(string))
if _, ok := d["peer id"]; ok {
p.ID = []byte(d["peer id"].(string))
}
p.Port = int(d["port"].(int64))
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/tracker/peer.go#L16-L22 | train |
anacrolix/torrent | metainfo/announcelist.go | OverridesAnnounce | func (al AnnounceList) OverridesAnnounce(announce string) bool {
for _, tier := range al {
for _, url := range tier {
if url != "" || announce == "" {
return true
}
}
}
return false
} | go | func (al AnnounceList) OverridesAnnounce(announce string) bool {
for _, tier := range al {
for _, url := range tier {
if url != "" || announce == "" {
return true
}
}
}
return false
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/metainfo/announcelist.go#L6-L15 | train |
anacrolix/torrent | prioritized_peers.go | Add | func (me *prioritizedPeers) Add(p Peer) bool {
return me.om.ReplaceOrInsert(prioritizedPeersItem{me.getPrio(p), p}) != nil
} | go | func (me *prioritizedPeers) Add(p Peer) bool {
return me.om.ReplaceOrInsert(prioritizedPeersItem{me.getPrio(p), p}) != nil
} | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/prioritized_peers.go#L33-L35 | train |
anacrolix/torrent | storage/file.go | defaultPathMaker | func defaultPathMaker(baseDir string, info *metainfo.Info, infoHash metainfo.Hash) string {
return baseDir
} | go | func defaultPathMaker(baseDir string, info *metainfo.Info, infoHash metainfo.Hash) string {
return baseDir
} | [
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] | // The Default path maker just returns the current path | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/storage/file.go#L21-L23 | train |
anacrolix/torrent | storage/file.go | NewFileWithCustomPathMaker | func NewFileWithCustomPathMaker(baseDir string, pathMaker func(baseDir string, info *metainfo.Info, infoHash metainfo.Hash) string) ClientImpl {
return newFileWithCustomPathMakerAndCompletion(baseDir, pathMaker, pieceCompletionForDir(baseDir))
} | go | func NewFileWithCustomPathMaker(baseDir string, pathMaker func(baseDir string, info *metainfo.Info, infoHash metainfo.Hash) string) ClientImpl {
return newFileWithCustomPathMakerAndCompletion(baseDir, pathMaker, pieceCompletionForDir(baseDir))
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/storage/file.go#L44-L46 | train |
anacrolix/torrent | storage/file.go | CreateNativeZeroLengthFiles | func CreateNativeZeroLengthFiles(info *metainfo.Info, dir string) (err error) {
for _, fi := range info.UpvertedFiles() {
if fi.Length != 0 {
continue
}
name := filepath.Join(append([]string{dir, info.Name}, fi.Path...)...)
os.MkdirAll(filepath.Dir(name), 0777)
var f io.Closer
f, err = os.Create(name)
if err != nil {
break
}
f.Close()
}
return
} | go | func CreateNativeZeroLengthFiles(info *metainfo.Info, dir string) (err error) {
for _, fi := range info.UpvertedFiles() {
if fi.Length != 0 {
continue
}
name := filepath.Join(append([]string{dir, info.Name}, fi.Path...)...)
os.MkdirAll(filepath.Dir(name), 0777)
var f io.Closer
f, err = os.Create(name)
if err != nil {
break
}
f.Close()
}
return
} | [
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// a helper for file-based storages, which don't address or write to zero-
// length files because they have no corresponding pieces. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/storage/file.go#L103-L118 | train |
anacrolix/torrent | storage/file.go | readFileAt | func (fst *fileTorrentImplIO) readFileAt(fi metainfo.FileInfo, b []byte, off int64) (n int, err error) {
f, err := os.Open(fst.fts.fileInfoName(fi))
if os.IsNotExist(err) {
// File missing is treated the same as a short file.
err = io.EOF
return
}
if err != nil {
return
}
defer f.Close()
// Limit the read to within the expected bounds of this file.
if int64(len(b)) > fi.Length-off {
b = b[:fi.Length-off]
}
for off < fi.Length && len(b) != 0 {
n1, err1 := f.ReadAt(b, off)
b = b[n1:]
n += n1
off += int64(n1)
if n1 == 0 {
err = err1
break
}
}
return
} | go | func (fst *fileTorrentImplIO) readFileAt(fi metainfo.FileInfo, b []byte, off int64) (n int, err error) {
f, err := os.Open(fst.fts.fileInfoName(fi))
if os.IsNotExist(err) {
// File missing is treated the same as a short file.
err = io.EOF
return
}
if err != nil {
return
}
defer f.Close()
// Limit the read to within the expected bounds of this file.
if int64(len(b)) > fi.Length-off {
b = b[:fi.Length-off]
}
for off < fi.Length && len(b) != 0 {
n1, err1 := f.ReadAt(b, off)
b = b[n1:]
n += n1
off += int64(n1)
if n1 == 0 {
err = err1
break
}
}
return
} | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/storage/file.go#L126-L152 | train |
anacrolix/torrent | storage/file.go | ReadAt | func (fst fileTorrentImplIO) ReadAt(b []byte, off int64) (n int, err error) {
for _, fi := range fst.fts.info.UpvertedFiles() {
for off < fi.Length {
n1, err1 := fst.readFileAt(fi, b, off)
n += n1
off += int64(n1)
b = b[n1:]
if len(b) == 0 {
// Got what we need.
return
}
if n1 != 0 {
// Made progress.
continue
}
err = err1
if err == io.EOF {
// Lies.
err = io.ErrUnexpectedEOF
}
return
}
off -= fi.Length
}
err = io.EOF
return
} | go | func (fst fileTorrentImplIO) ReadAt(b []byte, off int64) (n int, err error) {
for _, fi := range fst.fts.info.UpvertedFiles() {
for off < fi.Length {
n1, err1 := fst.readFileAt(fi, b, off)
n += n1
off += int64(n1)
b = b[n1:]
if len(b) == 0 {
// Got what we need.
return
}
if n1 != 0 {
// Made progress.
continue
}
err = err1
if err == io.EOF {
// Lies.
err = io.ErrUnexpectedEOF
}
return
}
off -= fi.Length
}
err = io.EOF
return
} | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/storage/file.go#L155-L181 | train |
anacrolix/torrent | t.go | Info | func (t *Torrent) Info() *metainfo.Info {
t.cl.lock()
defer t.cl.unlock()
return t.info
} | go | func (t *Torrent) Info() *metainfo.Info {
t.cl.lock()
defer t.cl.unlock()
return t.info
} | [
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"(",
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] | // Returns the metainfo info dictionary, or nil if it's not yet available. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L26-L30 | train |
anacrolix/torrent | t.go | NewReader | func (t *Torrent) NewReader() Reader {
r := reader{
mu: t.cl.locker(),
t: t,
readahead: 5 * 1024 * 1024,
length: *t.length,
}
t.addReader(&r)
return &r
} | go | func (t *Torrent) NewReader() Reader {
r := reader{
mu: t.cl.locker(),
t: t,
readahead: 5 * 1024 * 1024,
length: *t.length,
}
t.addReader(&r)
return &r
} | [
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] | // Returns a Reader bound to the torrent's data. All read calls block until
// the data requested is actually available. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L34-L43 | train |
anacrolix/torrent | t.go | PieceStateRuns | func (t *Torrent) PieceStateRuns() []PieceStateRun {
t.cl.rLock()
defer t.cl.rUnlock()
return t.pieceStateRuns()
} | go | func (t *Torrent) PieceStateRuns() []PieceStateRun {
t.cl.rLock()
defer t.cl.rUnlock()
return t.pieceStateRuns()
} | [
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"}"
] | // Returns the state of pieces of the torrent. They are grouped into runs of
// same state. The sum of the state run lengths is the number of pieces
// in the torrent. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L48-L52 | train |
anacrolix/torrent | t.go | PieceBytesMissing | func (t *Torrent) PieceBytesMissing(piece int) int64 {
t.cl.lock()
defer t.cl.unlock()
return int64(t.pieces[piece].bytesLeft())
} | go | func (t *Torrent) PieceBytesMissing(piece int) int64 {
t.cl.lock()
defer t.cl.unlock()
return int64(t.pieces[piece].bytesLeft())
} | [
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] | // Get missing bytes count for specific piece. | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L67-L72 | train |
anacrolix/torrent | t.go | Drop | func (t *Torrent) Drop() {
t.cl.lock()
t.cl.dropTorrent(t.infoHash)
t.cl.unlock()
} | go | func (t *Torrent) Drop() {
t.cl.lock()
t.cl.dropTorrent(t.infoHash)
t.cl.unlock()
} | [
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"}"
] | // Drop the torrent from the client, and close it. It's always safe to do
// this. No data corruption can, or should occur to either the torrent's data,
// or connected peers. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L77-L81 | train |
anacrolix/torrent | t.go | BytesCompleted | func (t *Torrent) BytesCompleted() int64 {
t.cl.rLock()
defer t.cl.rUnlock()
return t.bytesCompleted()
} | go | func (t *Torrent) BytesCompleted() int64 {
t.cl.rLock()
defer t.cl.rUnlock()
return t.bytesCompleted()
} | [
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")",
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"}"
] | // Number of bytes of the entire torrent we have completed. This is the sum of
// completed pieces, and dirtied chunks of incomplete pieces. Do not use this
// for download rate, as it can go down when pieces are lost or fail checks.
// Sample Torrent.Stats.DataBytesRead for actual file data download rate. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L87-L91 | train |
anacrolix/torrent | t.go | Seeding | func (t *Torrent) Seeding() bool {
t.cl.lock()
defer t.cl.unlock()
return t.seeding()
} | go | func (t *Torrent) Seeding() bool {
t.cl.lock()
defer t.cl.unlock()
return t.seeding()
} | [
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] | // Returns true if the torrent is currently being seeded. This occurs when the
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L101-L105 | train |
anacrolix/torrent | t.go | SetDisplayName | func (t *Torrent) SetDisplayName(dn string) {
t.nameMu.Lock()
defer t.nameMu.Unlock()
if t.haveInfo() {
return
}
t.displayName = dn
} | go | func (t *Torrent) SetDisplayName(dn string) {
t.nameMu.Lock()
defer t.nameMu.Unlock()
if t.haveInfo() {
return
}
t.displayName = dn
} | [
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] | // Clobbers the torrent display name. The display name is used as the torrent
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L109-L116 | train |
anacrolix/torrent | t.go | Metainfo | func (t *Torrent) Metainfo() metainfo.MetaInfo {
t.cl.lock()
defer t.cl.unlock()
return t.newMetaInfo()
} | go | func (t *Torrent) Metainfo() metainfo.MetaInfo {
t.cl.lock()
defer t.cl.unlock()
return t.newMetaInfo()
} | [
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"}"
] | // Returns a run-time generated metainfo for the torrent that includes the
// info bytes and announce-list as currently known to the client. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L132-L136 | train |
anacrolix/torrent | t.go | DownloadPieces | func (t *Torrent) DownloadPieces(begin, end pieceIndex) {
t.cl.lock()
defer t.cl.unlock()
t.downloadPiecesLocked(begin, end)
} | go | func (t *Torrent) DownloadPieces(begin, end pieceIndex) {
t.cl.lock()
defer t.cl.unlock()
t.downloadPiecesLocked(begin, end)
} | [
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"}"
] | // Raise the priorities of pieces in the range [begin, end) to at least Normal
// priority. Piece indexes are not the same as bytes. Requires that the info
// has been obtained, see Torrent.Info and Torrent.GotInfo. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/t.go#L156-L160 | train |
anacrolix/torrent | torrent.go | KnownSwarm | func (t *Torrent) KnownSwarm() (ks []Peer) {
// Add pending peers to the list
t.peers.Each(func(peer Peer) {
ks = append(ks, peer)
})
// Add half-open peers to the list
for _, peer := range t.halfOpen {
ks = append(ks, peer)
}
// Add active peers to the list
for conn := range t.conns {
ks = append(ks, Peer{
Id: conn.PeerID,
IP: conn.remoteAddr.IP,
Port: int(conn.remoteAddr.Port),
Source: conn.Discovery,
// > If the connection is encrypted, that's certainly enough to set SupportsEncryption.
// > But if we're not connected to them with an encrypted connection, I couldn't say
// > what's appropriate. We can carry forward the SupportsEncryption value as we
// > received it from trackers/DHT/PEX, or just use the encryption state for the
// > connection. It's probably easiest to do the latter for now.
// https://github.com/anacrolix/torrent/pull/188
SupportsEncryption: conn.headerEncrypted,
})
}
return
} | go | func (t *Torrent) KnownSwarm() (ks []Peer) {
// Add pending peers to the list
t.peers.Each(func(peer Peer) {
ks = append(ks, peer)
})
// Add half-open peers to the list
for _, peer := range t.halfOpen {
ks = append(ks, peer)
}
// Add active peers to the list
for conn := range t.conns {
ks = append(ks, Peer{
Id: conn.PeerID,
IP: conn.remoteAddr.IP,
Port: int(conn.remoteAddr.Port),
Source: conn.Discovery,
// > If the connection is encrypted, that's certainly enough to set SupportsEncryption.
// > But if we're not connected to them with an encrypted connection, I couldn't say
// > what's appropriate. We can carry forward the SupportsEncryption value as we
// > received it from trackers/DHT/PEX, or just use the encryption state for the
// > connection. It's probably easiest to do the latter for now.
// https://github.com/anacrolix/torrent/pull/188
SupportsEncryption: conn.headerEncrypted,
})
}
return
} | [
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"// > If the connection is encrypted, that's certainly enough to set SupportsEncryption.",
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"// > what's appropriate. We can carry forward the SupportsEncryption value as we",
"// > received it from trackers/DHT/PEX, or just use the encryption state for the",
"// > connection. It's probably easiest to do the latter for now.",
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"}",
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] | // KnownSwarm returns the known subset of the peers in the Torrent's swarm, including active,
// pending, and half-open peers. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L157-L187 | train |
anacrolix/torrent | torrent.go | addrActive | func (t *Torrent) addrActive(addr string) bool {
if _, ok := t.halfOpen[addr]; ok {
return true
}
for c := range t.conns {
ra := c.remoteAddr
if ra.String() == addr {
return true
}
}
return false
} | go | func (t *Torrent) addrActive(addr string) bool {
if _, ok := t.halfOpen[addr]; ok {
return true
}
for c := range t.conns {
ra := c.remoteAddr
if ra.String() == addr {
return true
}
}
return false
} | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L208-L219 | train |
anacrolix/torrent | torrent.go | pieceFirstFileIndex | func pieceFirstFileIndex(pieceOffset int64, files []*File) int {
for i, f := range files {
if f.offset+f.length > pieceOffset {
return i
}
}
return 0
} | go | func pieceFirstFileIndex(pieceOffset int64, files []*File) int {
for i, f := range files {
if f.offset+f.length > pieceOffset {
return i
}
}
return 0
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L315-L322 | train |
anacrolix/torrent | torrent.go | pieceEndFileIndex | func pieceEndFileIndex(pieceEndOffset int64, files []*File) int {
for i, f := range files {
if f.offset+f.length >= pieceEndOffset {
return i + 1
}
}
return 0
} | go | func pieceEndFileIndex(pieceEndOffset int64, files []*File) int {
for i, f := range files {
if f.offset+f.length >= pieceEndOffset {
return i + 1
}
}
return 0
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L326-L333 | train |
anacrolix/torrent | torrent.go | setInfoBytes | func (t *Torrent) setInfoBytes(b []byte) error {
if metainfo.HashBytes(b) != t.infoHash {
return errors.New("info bytes have wrong hash")
}
var info metainfo.Info
if err := bencode.Unmarshal(b, &info); err != nil {
return fmt.Errorf("error unmarshalling info bytes: %s", err)
}
if err := t.setInfo(&info); err != nil {
return err
}
t.metadataBytes = b
t.metadataCompletedChunks = nil
t.onSetInfo()
return nil
} | go | func (t *Torrent) setInfoBytes(b []byte) error {
if metainfo.HashBytes(b) != t.infoHash {
return errors.New("info bytes have wrong hash")
}
var info metainfo.Info
if err := bencode.Unmarshal(b, &info); err != nil {
return fmt.Errorf("error unmarshalling info bytes: %s", err)
}
if err := t.setInfo(&info); err != nil {
return err
}
t.metadataBytes = b
t.metadataCompletedChunks = nil
t.onSetInfo()
return nil
} | [
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] | // Called when metadata for a torrent becomes available. | [
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"available",
"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L387-L402 | train |
anacrolix/torrent | torrent.go | name | func (t *Torrent) name() string {
t.nameMu.RLock()
defer t.nameMu.RUnlock()
if t.haveInfo() {
return t.info.Name
}
return t.displayName
} | go | func (t *Torrent) name() string {
t.nameMu.RLock()
defer t.nameMu.RUnlock()
if t.haveInfo() {
return t.info.Name
}
return t.displayName
} | [
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] | // The current working name for the torrent. Either the name in the info dict,
// or a display name given such as by the dn value in a magnet link, or "". | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L442-L449 | train |
anacrolix/torrent | torrent.go | pieceStateRunStatusChars | func pieceStateRunStatusChars(psr PieceStateRun) (ret string) {
ret = fmt.Sprintf("%d", psr.Length)
ret += func() string {
switch psr.Priority {
case PiecePriorityNext:
return "N"
case PiecePriorityNormal:
return "."
case PiecePriorityReadahead:
return "R"
case PiecePriorityNow:
return "!"
case PiecePriorityHigh:
return "H"
default:
return ""
}
}()
if psr.Checking {
ret += "H"
}
if psr.Partial {
ret += "P"
}
if psr.Complete {
ret += "C"
}
if !psr.Ok {
ret += "?"
}
return
} | go | func pieceStateRunStatusChars(psr PieceStateRun) (ret string) {
ret = fmt.Sprintf("%d", psr.Length)
ret += func() string {
switch psr.Priority {
case PiecePriorityNext:
return "N"
case PiecePriorityNormal:
return "."
case PiecePriorityReadahead:
return "R"
case PiecePriorityNow:
return "!"
case PiecePriorityHigh:
return "H"
default:
return ""
}
}()
if psr.Checking {
ret += "H"
}
if psr.Partial {
ret += "P"
}
if psr.Complete {
ret += "C"
}
if !psr.Ok {
ret += "?"
}
return
} | [
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] | // Produces a small string representing a PieceStateRun. | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L499-L530 | train |
anacrolix/torrent | torrent.go | newMetaInfo | func (t *Torrent) newMetaInfo() metainfo.MetaInfo {
return metainfo.MetaInfo{
CreationDate: time.Now().Unix(),
Comment: "dynamic metainfo from client",
CreatedBy: "go.torrent",
AnnounceList: t.metainfo.UpvertedAnnounceList(),
InfoBytes: func() []byte {
if t.haveInfo() {
return t.metadataBytes
} else {
return nil
}
}(),
}
} | go | func (t *Torrent) newMetaInfo() metainfo.MetaInfo {
return metainfo.MetaInfo{
CreationDate: time.Now().Unix(),
Comment: "dynamic metainfo from client",
CreatedBy: "go.torrent",
AnnounceList: t.metainfo.UpvertedAnnounceList(),
InfoBytes: func() []byte {
if t.haveInfo() {
return t.metadataBytes
} else {
return nil
}
}(),
}
} | [
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] | // Returns a run-time generated MetaInfo that includes the info bytes and
// announce-list as currently known to the client. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L602-L616 | train |
anacrolix/torrent | torrent.go | bytesLeftAnnounce | func (t *Torrent) bytesLeftAnnounce() uint64 {
if t.haveInfo() {
return uint64(t.bytesLeft())
} else {
return math.MaxUint64
}
} | go | func (t *Torrent) bytesLeftAnnounce() uint64 {
if t.haveInfo() {
return uint64(t.bytesLeft())
} else {
return math.MaxUint64
}
} | [
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] | // Bytes left to give in tracker announces. | [
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"."
] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L638-L644 | train |
anacrolix/torrent | torrent.go | offsetRequest | func (t *Torrent) offsetRequest(off int64) (req request, ok bool) {
return torrentOffsetRequest(*t.length, t.info.PieceLength, int64(t.chunkSize), off)
} | go | func (t *Torrent) offsetRequest(off int64) (req request, ok bool) {
return torrentOffsetRequest(*t.length, t.info.PieceLength, int64(t.chunkSize), off)
} | [
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] | // Return the request that would include the given offset into the torrent
// data. Returns !ok if there is no such request. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L691-L693 | train |
anacrolix/torrent | torrent.go | worstBadConn | func (t *Torrent) worstBadConn() *connection {
wcs := worseConnSlice{t.unclosedConnsAsSlice()}
heap.Init(&wcs)
for wcs.Len() != 0 {
c := heap.Pop(&wcs).(*connection)
if c.stats.ChunksReadWasted.Int64() >= 6 && c.stats.ChunksReadWasted.Int64() > c.stats.ChunksReadUseful.Int64() {
return c
}
// If the connection is in the worst half of the established
// connection quota and is older than a minute.
if wcs.Len() >= (t.maxEstablishedConns+1)/2 {
// Give connections 1 minute to prove themselves.
if time.Since(c.completedHandshake) > time.Minute {
return c
}
}
}
return nil
} | go | func (t *Torrent) worstBadConn() *connection {
wcs := worseConnSlice{t.unclosedConnsAsSlice()}
heap.Init(&wcs)
for wcs.Len() != 0 {
c := heap.Pop(&wcs).(*connection)
if c.stats.ChunksReadWasted.Int64() >= 6 && c.stats.ChunksReadWasted.Int64() > c.stats.ChunksReadUseful.Int64() {
return c
}
// If the connection is in the worst half of the established
// connection quota and is older than a minute.
if wcs.Len() >= (t.maxEstablishedConns+1)/2 {
// Give connections 1 minute to prove themselves.
if time.Since(c.completedHandshake) > time.Minute {
return c
}
}
}
return nil
} | [
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] | // The worst connection is one that hasn't been sent, or sent anything useful
// for the longest. A bad connection is one that usually sends us unwanted
// pieces, or has been in worser half of the established connections for more
// than a minute. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L815-L833 | train |
anacrolix/torrent | torrent.go | updatePiecePriorities | func (t *Torrent) updatePiecePriorities(begin, end pieceIndex) {
for i := begin; i < end; i++ {
t.updatePiecePriority(i)
}
} | go | func (t *Torrent) updatePiecePriorities(begin, end pieceIndex) {
for i := begin; i < end; i++ {
t.updatePiecePriority(i)
}
} | [
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] | // Update all piece priorities in one hit. This function should have the same
// output as updatePiecePriority, but across all pieces. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L936-L940 | train |
anacrolix/torrent | torrent.go | byteRegionPieces | func (t *Torrent) byteRegionPieces(off, size int64) (begin, end pieceIndex) {
if off >= *t.length {
return
}
if off < 0 {
size += off
off = 0
}
if size <= 0 {
return
}
begin = pieceIndex(off / t.info.PieceLength)
end = pieceIndex((off + size + t.info.PieceLength - 1) / t.info.PieceLength)
if end > pieceIndex(t.info.NumPieces()) {
end = pieceIndex(t.info.NumPieces())
}
return
} | go | func (t *Torrent) byteRegionPieces(off, size int64) (begin, end pieceIndex) {
if off >= *t.length {
return
}
if off < 0 {
size += off
off = 0
}
if size <= 0 {
return
}
begin = pieceIndex(off / t.info.PieceLength)
end = pieceIndex((off + size + t.info.PieceLength - 1) / t.info.PieceLength)
if end > pieceIndex(t.info.NumPieces()) {
end = pieceIndex(t.info.NumPieces())
}
return
} | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L943-L960 | train |
anacrolix/torrent | torrent.go | forReaderOffsetPieces | func (t *Torrent) forReaderOffsetPieces(f func(begin, end pieceIndex) (more bool)) (all bool) {
for r := range t.readers {
p := r.pieces
if p.begin >= p.end {
continue
}
if !f(p.begin, p.end) {
return false
}
}
return true
} | go | func (t *Torrent) forReaderOffsetPieces(f func(begin, end pieceIndex) (more bool)) (all bool) {
for r := range t.readers {
p := r.pieces
if p.begin >= p.end {
continue
}
if !f(p.begin, p.end) {
return false
}
}
return true
} | [
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] | // Returns true if all iterations complete without breaking. Returns the read
// regions for all readers. The reader regions should not be merged as some
// callers depend on this method to enumerate readers. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L965-L976 | train |
anacrolix/torrent | torrent.go | readAt | func (t *Torrent) readAt(b []byte, off int64) (n int, err error) {
p := &t.pieces[off/t.info.PieceLength]
p.waitNoPendingWrites()
return p.Storage().ReadAt(b, off-p.Info().Offset())
} | go | func (t *Torrent) readAt(b []byte, off int64) (n int, err error) {
p := &t.pieces[off/t.info.PieceLength]
p.waitNoPendingWrites()
return p.Storage().ReadAt(b, off-p.Info().Offset())
} | [
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] | // Non-blocking read. Client lock is not required. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L1074-L1078 | train |
anacrolix/torrent | torrent.go | maybeCompleteMetadata | func (t *Torrent) maybeCompleteMetadata() error {
if t.haveInfo() {
// Nothing to do.
return nil
}
if !t.haveAllMetadataPieces() {
// Don't have enough metadata pieces.
return nil
}
err := t.setInfoBytes(t.metadataBytes)
if err != nil {
t.invalidateMetadata()
return fmt.Errorf("error setting info bytes: %s", err)
}
if t.cl.config.Debug {
t.logger.Printf("%s: got metadata from peers", t)
}
return nil
} | go | func (t *Torrent) maybeCompleteMetadata() error {
if t.haveInfo() {
// Nothing to do.
return nil
}
if !t.haveAllMetadataPieces() {
// Don't have enough metadata pieces.
return nil
}
err := t.setInfoBytes(t.metadataBytes)
if err != nil {
t.invalidateMetadata()
return fmt.Errorf("error setting info bytes: %s", err)
}
if t.cl.config.Debug {
t.logger.Printf("%s: got metadata from peers", t)
}
return nil
} | [
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] | // Returns an error if the metadata was completed, but couldn't be set for
// some reason. Blame it on the last peer to contribute. | [
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] | d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb | https://github.com/anacrolix/torrent/blob/d2400968fc54c3d8a6482d4ca5ff16cc5e5139cb/torrent.go#L1088-L1106 | train |
Subsets and Splits