test: add bridge creation sample

New test sample file, test-create-bridge.c
Create an bridge (testbrige) and attach an already setup interface (testtap1) to it.

Signed-off-by: Nicolas PLANEL <nicolas.planel@enovance.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>

2 files changed, 82 insertions, 0 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 4b63a7c..a37de96 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -21,6 +21,7 @@ UNIT_TESTS = check-all
 check_PROGRAMS = \
 	test-create-bond \
 	test-create-vlan \
+	test-create-bridge \
 	test-delete-link \
 	test-socket-creation \
 	test-complex-HTB-with-hash-filters \
@@ -40,6 +41,7 @@ endif
 test_cache_mngr_SOURCES = test-cache-mngr.c
 test_create_bond_SOURCES = test-create-bond.c
 test_create_vlan_SOURCES = test-create-vlan.c
+test_create_bridge_SOURCES = test-create-bridge.c
 test_delete_link_SOURCES = test-delete-link.c
 test_genl_SOURCES = test-genl.c
 test_nf_cache_mngr_SOURCES = test-nf-cache-mngr.c
diff --git a/tests/test-create-bridge.c b/tests/test-create-bridge.c
new file mode 100644
index 0000000..7202cd7
--- /dev/null
+++ b/tests/test-create-bridge.c
@@ -0,0 +1,80 @@
+#include <netlink/netlink.h>
+#include <netlink/route/link.h>
+#include <netlink/route/link/bridge.h>
+
+#define TEST_BRIDGE_NAME "testbridge"
+#define TEST_INTERFACE_NAME "testtap1"
+
+int create_bridge(struct nl_sock *sk, struct nl_cache *link_cache, const char *name) {
+	struct rtnl_link *link;
+	int err;
+
+	link = rtnl_link_alloc();
+	if ((err = rtnl_link_set_type(link, "bridge")) < 0) {
+		rtnl_link_put(link);
+		return err;
+	}
+	rtnl_link_set_name(link, name);
+
+	if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
+		return err;
+	}
+	rtnl_link_put(link);
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	struct rtnl_link *link;
+	struct nl_cache *link_cache;
+	struct nl_sock *sk;
+	int err;
+
+	sk = nl_socket_alloc();
+	if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
+		nl_perror(err, "Unable to connect socket");
+		return err;
+	}
+
+	if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
+		nl_perror(err, "Unable to allocate cache");
+		return err;
+	}
+
+	if ((err = create_bridge(sk, link_cache, TEST_BRIDGE_NAME)) < 0) {
+		nl_perror(err, "Unable to allocate testbridge");
+		return err;
+	}
+
+	nl_cache_refill(sk, link_cache);
+
+	link = rtnl_link_get_by_name(link_cache, TEST_BRIDGE_NAME);
+	struct rtnl_link *ltap = rtnl_link_get_by_name(link_cache, TEST_INTERFACE_NAME);
+	if (!ltap) {
+		fprintf(stderr, "You should create a tap interface before lunch this test (# tunctl -t %s)\n", TEST_INTERFACE_NAME);
+		return -1;
+	}
+
+	if ((err = rtnl_link_enslave(sk, link, ltap)) < 0) {
+		nl_perror(err, "Unable to enslave interface to his bridge\n");
+		return err;
+	}
+
+	if(rtnl_link_is_bridge(link) == 0) {
+		fprintf(stderr, "Link is not a bridge\n");
+		return -2;
+	}
+	if(rtnl_link_get_master(ltap) <= 0) {
+		fprintf(stderr, "Interface is not attached to a bridge\n");
+		return -3;
+	}
+
+	rtnl_link_put(ltap);
+	rtnl_link_put(link);
+
+	nl_cache_free(link_cache);
+	nl_socket_free(sk);
+
+	return 0;
+}