added simple peer server

cmd/peerserver/main.go

+package main
+
+import (
+	"crypto/elliptic"
+	"fmt"
+	"log"
+	"net"
+	"os"
+
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/p2p"
+)
+
+func main() {
+	logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.InfoLevel))
+	key, _ := crypto.GenerateKey()
+	marshaled := elliptic.Marshal(crypto.S256(), key.PublicKey.X, key.PublicKey.Y)
+
+	srv := p2p.Server{
+		MaxPeers:   10,
+		Identity:   p2p.NewSimpleClientIdentity("Ethereum(G)", "0.1", "Peer Server Two", string(marshaled)),
+		ListenAddr: ":30301",
+		NAT:        p2p.UPNP(),
+	}
+	if err := srv.Start(); err != nil {
+		fmt.Println("could not start server:", err)
+		os.Exit(1)
+	}
+
+	// add seed peers
+	seed, err := net.ResolveTCPAddr("tcp", "poc-7.ethdev.com:30300")
+	if err != nil {
+		fmt.Println("couldn't resolve:", err)
+		os.Exit(1)
+	}
+	srv.SuggestPeer(seed.IP, seed.Port, nil)
+
+	select {}
+}