forked from cerc-io/plugeth
Add DNS Bootstrapping
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parent
be543a6d17
commit
8162aff8cf
53
ethereum.go
53
ethereum.go
@ -262,21 +262,46 @@ func (s *Ethereum) Start() {
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go s.ReapDeadPeerHandler()
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go s.ReapDeadPeerHandler()
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if ethutil.Config.Seed {
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if ethutil.Config.Seed {
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ethutil.Config.Log.Debugln("Seeding")
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ethutil.Config.Log.Debugln("Seeding")
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// Testnet seed bootstrapping
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// DNS Bootstrapping
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resp, err := http.Get("https://www.ethereum.org/servers.poc3.txt")
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_, nodes, err := net.LookupSRV("eth", "tcp", "ethereum.org")
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if err != nil {
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if(err == nil) {
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log.Println("Fetching seed failed:", err)
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peers := []string{}
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return
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// Iterate SRV nodes
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}
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for _, n := range nodes {
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defer resp.Body.Close()
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target := n.Target
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body, err := ioutil.ReadAll(resp.Body)
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port := n.Port
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if err != nil {
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// Resolve target to ip (Go returns list, so may resolve to multiple ips?)
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log.Println("Reading seed failed:", err)
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addr, err := net.LookupHost(target)
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return
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if(err == nil) {
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}
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for _, a := range addr {
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// Build string out of SRV port and Resolved IP
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peer := net.JoinHostPort(a, strconv.Itoa(int(port)))
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log.Println("Found DNS Bootstrap Peer:", peer)
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peers = append(peers, peer)
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}
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} else {
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log.Println("Couldn't resolve :", target)
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}
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}
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// Connect to Peer list
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s.ProcessPeerList(peers)
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} else {
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// Fallback to servers.poc3.txt
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resp, err := http.Get("http://www.ethereum.org/servers.poc3.txt")
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if err != nil {
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log.Println("Fetching seed failed:", err)
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return
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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log.Println("Reading seed failed:", err)
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return
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}
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s.ConnectToPeer(string(body))
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s.ConnectToPeer(string(body))
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}
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}
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}
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}
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}
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