kernel-netlink: Add a simple send message test querying available links

src/libhydra/plugins/kernel_netlink/Makefile.am

@@ -29,6 +29,7 @@ check_PROGRAMS = $(TESTS)
 
 tests_SOURCES = \
 	tests.h tests.c \
+	suites/test_socket.c \
 	kernel_netlink_shared.c
 
 tests_CFLAGS = \

src/libhydra/plugins/kernel_netlink/suites/test_socket.c

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2014 Martin Willi
+ * Copyright (C) 2014 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include <test_suite.h>
+
+#include "../kernel_netlink_shared.h"
+
+START_TEST(test_echo)
+{
+	netlink_socket_t *s;
+	struct nlmsghdr *out, *current;
+	struct rtgenmsg *msg;
+	size_t len;
+	netlink_buf_t request = {
+		.hdr = {
+			.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
+			.nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT,
+			.nlmsg_type = RTM_GETLINK,
+		},
+	};
+
+	s = netlink_socket_create(NETLINK_ROUTE, NULL);
+	msg = NLMSG_DATA(&request.hdr);
+	msg->rtgen_family = AF_UNSPEC;
+
+	ck_assert(s->send(s, &request.hdr, &out, &len) == SUCCESS);
+	current = out;
+	while (TRUE)
+	{
+		ck_assert(NLMSG_OK(current, len));
+		if (current->nlmsg_type == NLMSG_DONE)
+		{
+			break;
+		}
+		ck_assert_int_eq(current->nlmsg_type, RTM_NEWLINK);
+		current = NLMSG_NEXT(current, len);
+	}
+	free(out);
+	s->destroy(s);
+}
+END_TEST
+
+Suite *socket_suite_create()
+{
+	Suite *s;
+	TCase *tc;
+
+	s = suite_create("netlink socket");
+
+	tc = tcase_create("echo");
+	tcase_add_test(tc, test_echo);
+	suite_add_tcase(s, tc);
+
+	return s;
+}

src/libhydra/plugins/kernel_netlink/tests.h

@@ -12,3 +12,5 @@
  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * for more details.
  */
+
+TEST_SUITE(socket_suite_create)