Revert "delete everything" (includes everything non-go-crypto)

This reverts commit 96a3502

p2p/listener_test.go

@@ -0,0 +1,47 @@
+package p2p
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/tendermint/tmlibs/log"
+)
+
+func TestListener(t *testing.T) {
+	// Create a listener
+	l := NewDefaultListener("tcp", ":8001", true, log.TestingLogger())
+
+	// Dial the listener
+	lAddr := l.ExternalAddress()
+	connOut, err := lAddr.Dial()
+	if err != nil {
+		t.Fatalf("Could not connect to listener address %v", lAddr)
+	} else {
+		t.Logf("Created a connection to listener address %v", lAddr)
+	}
+	connIn, ok := <-l.Connections()
+	if !ok {
+		t.Fatalf("Could not get inbound connection from listener")
+	}
+
+	msg := []byte("hi!")
+	go func() {
+		_, err := connIn.Write(msg)
+		if err != nil {
+			t.Error(err)
+		}
+	}()
+	b := make([]byte, 32)
+	n, err := connOut.Read(b)
+	if err != nil {
+		t.Fatalf("Error reading off connection: %v", err)
+	}
+
+	b = b[:n]
+	if !bytes.Equal(msg, b) {
+		t.Fatalf("Got %s, expected %s", b, msg)
+	}
+
+	// Close the server, no longer needed.
+	l.Stop()
+}