"github.com/anacrolix/missinggo/v2/pubsub"
"github.com/anacrolix/multiless"
"github.com/anacrolix/sync"
- "github.com/davecgh/go-spew/spew"
"github.com/pion/datachannel"
"golang.org/x/exp/maps"
"github.com/anacrolix/torrent/bencode"
"github.com/anacrolix/torrent/common"
"github.com/anacrolix/torrent/internal/check"
+ "github.com/anacrolix/torrent/internal/nestedmaps"
"github.com/anacrolix/torrent/metainfo"
pp "github.com/anacrolix/torrent/peer_protocol"
utHolepunch "github.com/anacrolix/torrent/peer_protocol/ut-holepunch"
maxEstablishedConns int
// Set of addrs to which we're attempting to connect. Connections are
// half-open until all handshakes are completed.
- halfOpen map[string]PeerInfo
- // The final ess is not silent here as it's in the plural.
- utHolepunchRendezvous map[netip.AddrPort]*utHolepunchRendezvous
+ halfOpen map[string]map[outgoingConnAttemptKey]*PeerInfo
// Reserve of peers to connect to. A peer can be both here and in the
// active connections if were told about the peer after connecting with
requestIndexes []RequestIndex
}
+type outgoingConnAttemptKey = *PeerInfo
+
func (t *Torrent) length() int64 {
return t._length.Value
}
})
// Add half-open peers to the list
- for _, peer := range t.halfOpen {
- ks = append(ks, peer)
+ for _, attempts := range t.halfOpen {
+ for _, peer := range attempts {
+ ks = append(ks, *peer)
+ }
}
// Add active peers to the list
fmt.Fprintf(w, "DHT Announces: %d\n", t.numDHTAnnounces)
- spew.NewDefaultConfig()
- spew.Fdump(w, t.statsLocked())
+ dumpStats(w, t.statsLocked())
fmt.Fprintf(w, "webseeds:\n")
t.writePeerStatuses(w, maps.Values(t.webSeeds))
return ml.Less()
})
- fmt.Fprintf(w, "peer conns:\n")
+ fmt.Fprintf(w, "%v peer conns:\n", len(peerConns))
t.writePeerStatuses(w, g.SliceMap(peerConns, func(pc *PeerConn) *Peer {
return &pc.Peer
}))
}
}
-// Get bytes left
+// Returns a count of bytes that are not complete in storage, and not pending being written to
+// storage. This value is from the perspective of the download manager, and may not agree with the
+// actual state in storage. If you want read data synchronously you should use a Reader. See
+// https://github.com/anacrolix/torrent/issues/828.
func (t *Torrent) BytesMissing() (n int64) {
t.cl.rLock()
n = t.bytesMissingLocked()
func (t *Torrent) maybeDropMutuallyCompletePeer(
// I'm not sure about taking peer here, not all peer implementations actually drop. Maybe that's
// okay?
- p *Peer,
+ p *PeerConn,
) {
if !t.cl.config.DropMutuallyCompletePeers {
return
if p.useful() {
return
}
- t.logger.WithDefaultLevel(log.Debug).Printf("dropping %v, which is mutually complete", p)
+ p.logger.Levelf(log.Debug, "is mutually complete; dropping")
p.drop()
}
return
}
p := t.peers.PopMax()
- t.initiateConn(p, false, false)
+ opts := outgoingConnOpts{
+ peerInfo: p,
+ t: t,
+ requireRendezvous: false,
+ skipHolepunchRendezvous: false,
+ receivedHolepunchConnect: false,
+ HeaderObfuscationPolicy: t.cl.config.HeaderObfuscationPolicy,
+ }
+ initiateConn(opts, false)
initiated++
}
return
t.piece(piece).readerCond.Broadcast()
for conn := range t.conns {
conn.have(piece)
- t.maybeDropMutuallyCompletePeer(&conn.Peer)
+ t.maybeDropMutuallyCompletePeer(conn)
}
}
}
}
+func (t *Torrent) connectingToPeerAddr(addrStr string) bool {
+ return len(t.halfOpen[addrStr]) != 0
+}
+
+func (t *Torrent) hasPeerConnForAddr(x PeerRemoteAddr) bool {
+ addrStr := x.String()
+ for c := range t.conns {
+ ra := c.RemoteAddr
+ if ra.String() == addrStr {
+ return true
+ }
+ }
+ return false
+}
+
+func (t *Torrent) getHalfOpenPath(
+ addrStr string,
+ attemptKey outgoingConnAttemptKey,
+) nestedmaps.Path[*PeerInfo] {
+ return nestedmaps.Next(nestedmaps.Next(nestedmaps.Begin(&t.halfOpen), addrStr), attemptKey)
+}
+
+func (t *Torrent) addHalfOpen(addrStr string, attemptKey *PeerInfo) {
+ path := t.getHalfOpenPath(addrStr, attemptKey)
+ if path.Exists() {
+ panic("should be unique")
+ }
+ path.Set(attemptKey)
+ t.cl.numHalfOpen++
+}
+
// Start the process of connecting to the given peer for the given torrent if appropriate. I'm not
// sure all the PeerInfo fields are being used.
-func (t *Torrent) initiateConn(
- peer PeerInfo,
- requireRendezvous bool,
- skipHolepunchRendezvous bool,
+func initiateConn(
+ opts outgoingConnOpts,
+ ignoreLimits bool,
) {
+ t := opts.t
+ peer := opts.peerInfo
if peer.Id == t.cl.peerID {
return
}
return
}
addr := peer.Addr
- if t.addrActive(addr.String()) {
+ addrStr := addr.String()
+ if !ignoreLimits {
+ if t.connectingToPeerAddr(addrStr) {
+ return
+ }
+ }
+ if t.hasPeerConnForAddr(addr) {
return
}
- t.cl.numHalfOpen++
- t.halfOpen[addr.String()] = peer
- go t.cl.outgoingConnection(outgoingConnOpts{
- t: t,
- addr: peer.Addr,
- requireRendezvous: requireRendezvous,
- skipHolepunchRendezvous: skipHolepunchRendezvous,
- }, peer.Source, peer.Trusted)
+ attemptKey := &peer
+ t.addHalfOpen(addrStr, attemptKey)
+ go t.cl.outgoingConnection(
+ opts,
+ attemptKey,
+ )
}
// Adds a trusted, pending peer for each of the given Client's addresses. Typically used in tests to
// connection.
func (t *Torrent) allStats(f func(*ConnStats)) {
f(&t.stats)
- f(&t.cl.stats)
+ f(&t.cl.connStats)
}
func (t *Torrent) hashingPiece(i pieceIndex) bool {
}
return nil
case utHolepunch.Connect:
- t.logger.Printf("got holepunch connect from %v for %v", sender, msg.AddrPort)
- rz, ok := t.utHolepunchRendezvous[msg.AddrPort]
- if ok {
- delete(rz.relays, sender)
- rz.gotConnect.Set()
- rz.relayCond.Broadcast()
- } else {
- // If the rendezvous was removed because we timed out or already got a connect signal,
- // it doesn't hurt to try again.
- t.initiateConn(PeerInfo{
- Addr: msg.AddrPort,
- Source: PeerSourceUtHolepunch,
- }, false, true)
- }
+ t.logger.Printf("got holepunch connect request for %v from %p", msg.AddrPort, sender)
+ opts := outgoingConnOpts{
+ peerInfo: PeerInfo{
+ Addr: msg.AddrPort,
+ Source: PeerSourceUtHolepunch,
+ PexPeerFlags: sender.pex.remoteLiveConns[msg.AddrPort].UnwrapOrZeroValue(),
+ },
+ t: t,
+ // Don't attempt to start our own rendezvous if we fail to connect.
+ skipHolepunchRendezvous: true,
+ receivedHolepunchConnect: true,
+ // Assume that the other end initiated the rendezvous, and will use our preferred
+ // encryption. So we will act normally.
+ HeaderObfuscationPolicy: t.cl.config.HeaderObfuscationPolicy,
+ }
+ initiateConn(opts, true)
return nil
case utHolepunch.Error:
- rz, ok := t.utHolepunchRendezvous[msg.AddrPort]
- if ok {
- delete(rz.relays, sender)
- rz.relayCond.Broadcast()
- }
- t.logger.Printf("received ut_holepunch error message from %v: %v", sender, msg.ErrCode)
+ t.logger.Levelf(log.Debug, "received ut_holepunch error message from %v: %v", sender, msg.ErrCode)
return nil
default:
return fmt.Errorf("unhandled msg type %v", msg.MsgType)
}
}
-func (t *Torrent) startHolepunchRendezvous(addrPort netip.AddrPort) (rz *utHolepunchRendezvous, err error) {
- if MapContains(t.utHolepunchRendezvous, addrPort) {
- err = errors.New("rendezvous already exists")
- return
- }
- g.InitNew(&rz)
+func (t *Torrent) trySendHolepunchRendezvous(addrPort netip.AddrPort) error {
+ rzsSent := 0
for pc := range t.conns {
if !pc.supportsExtension(utHolepunch.ExtensionName) {
continue
continue
}
}
+ t.logger.Levelf(log.Debug, "sent ut_holepunch rendezvous message to %v for %v", pc, addrPort)
sendUtHolepunchMsg(pc, utHolepunch.Rendezvous, addrPort, 0)
- MakeMapIfNilAndSet(&rz.relays, pc, struct{}{})
+ rzsSent++
}
- if len(rz.relays) == 0 {
- err = fmt.Errorf("no eligible relays")
- return
+ if rzsSent == 0 {
+ return errors.New("no eligible relays")
}
- if !MakeMapIfNilAndSet(&t.utHolepunchRendezvous, addrPort, rz) {
- panic("expected to fail earlier if rendezvous already exists")
+ return nil
+}
+
+func (t *Torrent) numHalfOpenAttempts() (num int) {
+ for _, attempts := range t.halfOpen {
+ num += len(attempts)
}
return
}
+
+func (t *Torrent) getDialTimeoutUnlocked() time.Duration {
+ cl := t.cl
+ cl.rLock()
+ defer cl.rUnlock()
+ return t.dialTimeout()
+}