diff --git a/ethereum.go b/ethereum.go index 342f4f573e..fb97c34b1a 100644 --- a/ethereum.go +++ b/ethereum.go @@ -263,20 +263,45 @@ func (s *Ethereum) Start() { if ethutil.Config.Seed { ethutil.Config.Log.Debugln("Seeding") - // Testnet seed bootstrapping - resp, err := http.Get("https://www.ethereum.org/servers.poc3.txt") - if err != nil { - log.Println("Fetching seed failed:", err) - return - } - defer resp.Body.Close() - body, err := ioutil.ReadAll(resp.Body) - if err != nil { - log.Println("Reading seed failed:", err) - return - } + // DNS Bootstrapping + _, nodes, err := net.LookupSRV("eth", "tcp", "ethereum.org") + if err == nil { + peers := []string{} + // Iterate SRV nodes + for _, n := range nodes { + target := n.Target + port := strconv.Itoa(int(n.Port)) + // Resolve target to ip (Go returns list, so may resolve to multiple ips?) + addr, err := net.LookupHost(target) + if err == nil { + for _, a := range addr { + // Build string out of SRV port and Resolved IP + peer := net.JoinHostPort(a, port) + log.Println("Found DNS Bootstrap Peer:", peer) + peers = append(peers, peer) + } + } else { + log.Println("Couldn't resolve :", target) + } + } + // Connect to Peer list + s.ProcessPeerList(peers) + } else { + // Fallback to servers.poc3.txt + resp, err := http.Get("http://www.ethereum.org/servers.poc3.txt") + if err != nil { + log.Println("Fetching seed failed:", err) + return + } + defer resp.Body.Close() + body, err := ioutil.ReadAll(resp.Body) + if err != nil { + log.Println("Reading seed failed:", err) + return + } - s.ConnectToPeer(string(body)) + s.ConnectToPeer(string(body)) + } } }