Add recvmmsg and sendmmsg syscalls.

Also add the corresponding constant, struct, and function declarations
to <sys/socket.h>, and perfunctory tests so we know that the symbols
actually exist.

Signed-off-by: Guillaume Ranquet <guillaumex.ranquet@intel.com>
Change-Id: Ib0d854239d3716be90ad70973c579aff4895a4f7

tests/sys_socket_test.cpp

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include <gtest/gtest.h>
+
+#include <errno.h>
+#include <sys/socket.h>
+
+TEST(sys_socket, recvmmsg) {
+#if !defined(__GLIBC__) // TODO: Android's prebuilt gcc is too old for recvmmsg/sendmmsg.
+  ASSERT_EQ(-1, recvmmsg(-1, NULL, 0, 0, NULL));
+  ASSERT_EQ(EBADF, errno);
+#endif
+}
+
+TEST(sys_socket, sendmmsg) {
+#if !defined(__GLIBC__) // TODO: Android's prebuilt gcc is too old for recvmmsg/sendmmsg.
+  ASSERT_EQ(-1, sendmmsg(-1, NULL, 0, 0));
+  ASSERT_EQ(EBADF, errno);
+#endif
+}