Add a networking snippet module. (#78)

Has one method for now, Connectable, that implicitly checks
TCP connectivity to a host and port.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/main/java/com/google/android/mobly/snippet/bundled/NetworkingSnippet.java b/src/main/java/com/google/android/mobly/snippet/bundled/NetworkingSnippet.java
new file mode 100644
index 0000000..d72205a
--- /dev/null
+++ b/src/main/java/com/google/android/mobly/snippet/bundled/NetworkingSnippet.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2017 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.android.mobly.snippet.bundled;
+
+import java.net.InetAddress;
+import java.net.Socket;
+import java.io.IOException;
+import java.net.UnknownHostException;
+import com.google.android.mobly.snippet.Snippet;
+import com.google.android.mobly.snippet.rpc.Rpc;
+import com.google.android.mobly.snippet.util.Log;
+
+/** Snippet class for networking RPCs. */
+public class NetworkingSnippet implements Snippet {
+
+    @Rpc(description = "Check if a host and port are connectable using a TCP connection attempt.")
+    public boolean networkIsTcpConnectable(String host, int port) {
+        InetAddress addr;
+        try {
+            addr = InetAddress.getByName(host);
+        } catch (UnknownHostException uherr) {
+            Log.d("Host name lookup failure: " + uherr.getMessage());
+            return false;
+        }
+
+        try {
+            Socket sock = new Socket(addr, port);
+            sock.close();
+        } catch (IOException ioerr) {
+            Log.d("Did not make connection to host: " + ioerr.getMessage());
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public void shutdown() {}
+}