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#include <netlink/netlink.h>
#include <netlink/route/link.h>
#include <netlink/route/link/bridge.h>
#include <linux/netlink.h>
#define TEST_BRIDGE_NAME "testbridge"
#define TEST_INTERFACE_NAME "testtap1"
static 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;
}