// TODO(brian): handle errors
func (bs *bitswap) ReceiveMessage(ctx context.Context, p peer.Peer, incoming bsmsg.BitSwapMessage) (
peer.Peer, bsmsg.BitSwapMessage) {
log.Debugf("ReceiveMessage from %v", p.Key())
log.Debugf("Message wantlist: %v", incoming.Wantlist())
if p == nil {
log.Error("Received message from nil peer!")
// TODO propagate the error upward
return nil, nil
}
if incoming == nil {
log.Error("Got nil bitswap message!")
// TODO propagate the error upward
return nil, nil
}
// Record message bytes in ledger
// TODO: this is bad, and could be easily abused.
// Should only track *useful* messages in ledger
bs.strategy.MessageReceived(p, incoming) // FIRST
for _, block := range incoming.Blocks() {
// TODO verify blocks?
if err := bs.blockstore.Put(&block); err != nil {
continue // FIXME(brian): err ignored
}
bs.notifications.Publish(block)
err := bs.HasBlock(ctx, block)
if err != nil {
log.Warningf("HasBlock errored: %s", err)
}
}
message := bsmsg.New()
for _, wanted := range bs.wantlist.Keys() {
message.AddWanted(wanted)
}
for _, key := range incoming.Wantlist() {
// TODO: might be better to check if we have the block before checking
// if we should send it to someone
if bs.strategy.ShouldSendBlockToPeer(key, p) {
if block, errBlockNotFound := bs.blockstore.Get(key); errBlockNotFound != nil {
continue
} else {
message.AddBlock(*block)
}
}
}
defer bs.strategy.MessageSent(p, message)
log.Debug("Returning message.")
return p, message
}
func (s *strategist) MessageReceived(p peer.Peer, m bsmsg.BitSwapMessage) error {
s.lock.Lock()
defer s.lock.Unlock()
// TODO find a more elegant way to handle this check
if p == nil {
return errors.New("Strategy received nil peer")
}
if m == nil {
return errors.New("Strategy received nil message")
}
l := s.ledger(p)
for _, key := range m.Wantlist() {
l.Wants(key)
}
for _, block := range m.Blocks() {
// FIXME extract blocks.NumBytes(block) or block.NumBytes() method
l.ReceivedBytes(len(block.Data))
}
return errors.New("TODO")
}