api, network: count chunk deliveries per peer

api/inspector.go

@@ -63,6 +63,22 @@ func (inspector *Inspector) IsSyncing() bool {
 	return lrct.After(time.Now().Add(-15 * time.Second))
 }
 
+func (inspector *Inspector) DeliveriesPerPeer() map[string]int64 {
+	res := map[string]int64{}
+
+	// iterate connection in kademlia
+	inspector.hive.Kademlia.EachConn(nil, 255, func(p *network.Peer, po int) bool {
+		// get how many chunks we receive for retrieve requests per peer
+		peermetric := fmt.Sprintf("chunk.delivery.%x", p.Over()[:16])
+
+		res[fmt.Sprintf("%x", p.Over()[:16])] = metrics.GetOrRegisterCounter(peermetric, nil).Count()
+
+		return true
+	})
+
+	return res
+}
+
 // Has checks whether each chunk address is present in the underlying datastore,
 // the bool in the returned structs indicates if the underlying datastore has
 // the chunk stored with the given address (true), or not (false)

network/stream/delivery.go

@@ -131,6 +131,10 @@ func (d *Delivery) handleChunkDeliveryMsg(ctx context.Context, sp *Peer, req int
 	var mode chunk.ModePut
 	switch r := req.(type) {
 	case *ChunkDeliveryMsgRetrieval:
+		// count how many chunks we receive for retrieve requests per peer
+		peermetric := fmt.Sprintf("chunk.delivery.%x", sp.BzzAddr.Over()[:16])
+		metrics.GetOrRegisterCounter(peermetric, nil).Inc(1)
+
 		msg = (*ChunkDeliveryMsg)(r)
 		peerPO := chunk.Proximity(sp.BzzAddr.Over(), msg.Addr)
 		po := chunk.Proximity(d.kad.BaseAddr(), msg.Addr)