func (dht *IpfsDHT) handleAddProvider(ctx context.Context, p peer.ID, pmes *pb.Message) (*pb.Message, error) {
lm := make(lgbl.DeferredMap)
lm["peer"] = func() interface{} { return p.Pretty() }
defer log.EventBegin(ctx, "handleAddProvider", lm).Done()
key := key.Key(pmes.GetKey())
lm["key"] = func() interface{} { return key.Pretty() }
log.Debugf("%s adding %s as a provider for '%s'\n", dht.self, p, key)
// add provider should use the address given in the message
pinfos := pb.PBPeersToPeerInfos(pmes.GetProviderPeers())
for _, pi := range pinfos {
if pi.ID != p {
// we should ignore this provider reccord! not from originator.
// (we chould sign them and check signature later...)
log.Debugf("handleAddProvider received provider %s from %s. Ignore.", pi.ID, p)
continue
}
if len(pi.Addrs) < 1 {
log.Debugf("%s got no valid addresses for provider %s. Ignore.", dht.self, p)
continue
}
log.Infof("received provider %s for %s (addrs: %s)", p, key, pi.Addrs)
if pi.ID != dht.self { // dont add own addrs.
// add the received addresses to our peerstore.
dht.peerstore.AddAddrs(pi.ID, pi.Addrs, peer.ProviderAddrTTL)
}
dht.providers.AddProvider(ctx, key, p)
}
return nil, nil
}
func (dht *IpfsDHT) handleGetProviders(ctx context.Context, p peer.ID, pmes *pb.Message) (*pb.Message, error) {
lm := make(lgbl.DeferredMap)
lm["peer"] = func() interface{} { return p.Pretty() }
defer log.EventBegin(ctx, "handleGetProviders", lm).Done()
resp := pb.NewMessage(pmes.GetType(), pmes.GetKey(), pmes.GetClusterLevel())
key := key.Key(pmes.GetKey())
lm["key"] = func() interface{} { return key.Pretty() }
// debug logging niceness.
reqDesc := fmt.Sprintf("%s handleGetProviders(%s, %s): ", dht.self, p, key)
log.Debugf("%s begin", reqDesc)
defer log.Debugf("%s end", reqDesc)
// check if we have this value, to add ourselves as provider.
has, err := dht.datastore.Has(key.DsKey())
if err != nil && err != ds.ErrNotFound {
log.Debugf("unexpected datastore error: %v\n", err)
has = false
}
// setup providers
providers := dht.providers.GetProviders(ctx, key)
if has {
providers = append(providers, dht.self)
log.Debugf("%s have the value. added self as provider", reqDesc)
}
if providers != nil && len(providers) > 0 {
infos := peer.PeerInfos(dht.peerstore, providers)
resp.ProviderPeers = pb.PeerInfosToPBPeers(dht.host.Network(), infos)
log.Debugf("%s have %d providers: %s", reqDesc, len(providers), infos)
}
// Also send closer peers.
closer := dht.betterPeersToQuery(pmes, p, CloserPeerCount)
if closer != nil {
infos := peer.PeerInfos(dht.peerstore, closer)
resp.CloserPeers = pb.PeerInfosToPBPeers(dht.host.Network(), infos)
log.Debugf("%s have %d closer peers: %s", reqDesc, len(closer), infos)
}
return resp, nil
}