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authorMaran <maran.hidskes@gmail.com>2014-03-17 17:37:37 +0800
committerMaran <maran.hidskes@gmail.com>2014-03-17 17:37:37 +0800
commit8ea7e21f64842380833cce7aafa52b909cb8426b (patch)
tree08b138c3ef94da8fb1ff0a11c7c47aba5e59e616 /ethereum.go
parent3274e0a2496e622a847b213bb5ba0272650ef06c (diff)
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Merge
Diffstat (limited to 'ethereum.go')
-rw-r--r--ethereum.go51
1 files changed, 38 insertions, 13 deletions
diff --git a/ethereum.go b/ethereum.go
index 302f3c04f..c906a6954 100644
--- a/ethereum.go
+++ b/ethereum.go
@@ -271,20 +271,45 @@ 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))
+ }
}
}