shill: Add a mockable layer for socket.h.

Mock the layer in device_info_unittest.cc. Some cleanup.

BUG=chromium-os:17394
TEST=unit tests

Change-Id: I2ddcb2fd0e01418a463596bf4e3a804b3e3023b2
Reviewed-on: http://gerrit.chromium.org/gerrit/3807
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: Darin Petkov <petkov@chromium.org>
diff --git a/mock_sockets.h b/mock_sockets.h
new file mode 100644
index 0000000..cca5435
--- /dev/null
+++ b/mock_sockets.h
@@ -0,0 +1,32 @@
+// Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SHILL_MOCK_SOCKETS_H_
+#define SHILL_MOCK_SOCKETS_H_
+
+#include <gmock/gmock.h>
+
+#include "shill/sockets.h"
+
+namespace shill {
+
+class MockSockets : public Sockets {
+ public:
+  MOCK_METHOD3(Bind,
+               int(int sockfd, const struct sockaddr *addr, socklen_t addrlen));
+  MOCK_METHOD1(Close, int(int fd));
+  MOCK_METHOD4(Send,
+               ssize_t(int sockfd, const void *buf, size_t len, int flags));
+  MOCK_METHOD6(SendTo, ssize_t(int sockfd,
+                               const void *buf,
+                               size_t len,
+                               int flags,
+                               const struct sockaddr *dest_addr,
+                               socklen_t addrlen));
+  MOCK_METHOD3(Socket, int(int domain, int type, int protocol));
+};
+
+}  // namespace shill
+
+#endif  // SHILL_MOCK_SOCKETS_H_