1 #include <netlink/netlink.h>
2 #include <netlink/route/link.h>
3 #include <netlink/route/link/bridge.h>
4
5 #define TEST_BRIDGE_NAME "testbridge"
6 #define TEST_INTERFACE_NAME "testtap1"
7
create_bridge(struct nl_sock * sk,struct nl_cache * link_cache,const char * name)8 int create_bridge(struct nl_sock *sk, struct nl_cache *link_cache, const char *name) {
9 struct rtnl_link *link;
10 int err;
11
12 link = rtnl_link_alloc();
13 if ((err = rtnl_link_set_type(link, "bridge")) < 0) {
14 rtnl_link_put(link);
15 return err;
16 }
17 rtnl_link_set_name(link, name);
18
19 if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
20 return err;
21 }
22 rtnl_link_put(link);
23
24 return 0;
25 }
26
main(int argc,char * argv[])27 int main(int argc, char *argv[])
28 {
29 struct rtnl_link *link;
30 struct nl_cache *link_cache;
31 struct nl_sock *sk;
32 int err;
33
34 sk = nl_socket_alloc();
35 if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
36 nl_perror(err, "Unable to connect socket");
37 return err;
38 }
39
40 if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
41 nl_perror(err, "Unable to allocate cache");
42 return err;
43 }
44
45 if ((err = create_bridge(sk, link_cache, TEST_BRIDGE_NAME)) < 0) {
46 nl_perror(err, "Unable to allocate testbridge");
47 return err;
48 }
49
50 nl_cache_refill(sk, link_cache);
51
52 link = rtnl_link_get_by_name(link_cache, TEST_BRIDGE_NAME);
53 struct rtnl_link *ltap = rtnl_link_get_by_name(link_cache, TEST_INTERFACE_NAME);
54 if (!ltap) {
55 fprintf(stderr, "You should create a tap interface before lunch this test (# tunctl -t %s)\n", TEST_INTERFACE_NAME);
56 return -1;
57 }
58
59 if ((err = rtnl_link_enslave(sk, link, ltap)) < 0) {
60 nl_perror(err, "Unable to enslave interface to his bridge\n");
61 return err;
62 }
63
64 if(rtnl_link_is_bridge(link) == 0) {
65 fprintf(stderr, "Link is not a bridge\n");
66 return -2;
67 }
68 if(rtnl_link_get_master(ltap) <= 0) {
69 fprintf(stderr, "Interface is not attached to a bridge\n");
70 return -3;
71 }
72
73 rtnl_link_put(ltap);
74 rtnl_link_put(link);
75
76 nl_cache_free(link_cache);
77 nl_socket_free(sk);
78
79 return 0;
80 }
81