Example #1
0
func (mq *msgQueue) addMessage(entries []*bsmsg.Entry) {
	mq.outlk.Lock()
	defer func() {
		mq.outlk.Unlock()
		select {
		case mq.work <- struct{}{}:
		default:
		}
	}()

	// if we have no message held, or the one we are given is full
	// overwrite the one we are holding
	if mq.out == nil {
		mq.out = bsmsg.New(false)
	}

	// TODO: add a msg.Combine(...) method
	// otherwise, combine the one we are holding with the
	// one passed in
	for _, e := range entries {
		if e.Cancel {
			mq.out.Cancel(e.Key)
		} else {
			mq.out.AddEntry(e.Key, e.Priority)
		}
	}
}
Example #2
0
func (pm *WantManager) SendBlock(ctx context.Context, env *engine.Envelope) {
	// Blocks need to be sent synchronously to maintain proper backpressure
	// throughout the network stack
	defer env.Sent()

	msg := bsmsg.New(false)
	msg.AddBlock(env.Block)
	log.Infof("Sending block %s to %s", env.Peer, env.Block)
	err := pm.network.SendMessage(ctx, env.Peer, msg)
	if err != nil {
		log.Infof("sendblock error: %s", err)
	}
}
Example #3
0
// TODO: use goprocess here once i trust it
func (pm *WantManager) Run() {
	tock := time.NewTicker(rebroadcastDelay.Get())
	defer tock.Stop()
	for {
		select {
		case entries := <-pm.incoming:

			// add changes to our wantlist
			for _, e := range entries {
				if e.Cancel {
					pm.wl.Remove(e.Key)
				} else {
					pm.wl.Add(e.Key, e.Priority)
				}
			}

			// broadcast those wantlist changes
			for _, p := range pm.peers {
				p.addMessage(entries)
			}

		case <-tock.C:
			// resend entire wantlist every so often (REALLY SHOULDNT BE NECESSARY)
			var es []*bsmsg.Entry
			for _, e := range pm.wl.Entries() {
				es = append(es, &bsmsg.Entry{Entry: e})
			}
			for _, p := range pm.peers {
				p.outlk.Lock()
				p.out = bsmsg.New(true)
				p.outlk.Unlock()

				p.addMessage(es)
			}
		case p := <-pm.connect:
			pm.startPeerHandler(p)
		case p := <-pm.disconnect:
			pm.stopPeerHandler(p)
		case <-pm.ctx.Done():
			return
		}
	}
}
Example #4
0
func (pm *WantManager) startPeerHandler(p peer.ID) *msgQueue {
	_, ok := pm.peers[p]
	if ok {
		// TODO: log an error?
		return nil
	}

	mq := pm.newMsgQueue(p)

	// new peer, we will want to give them our full wantlist
	fullwantlist := bsmsg.New(true)
	for _, e := range pm.wl.Entries() {
		fullwantlist.AddEntry(e.Key, e.Priority)
	}
	mq.out = fullwantlist
	mq.work <- struct{}{}

	pm.peers[p] = mq
	go mq.runQueue(pm.ctx)
	return mq
}