#include <netlink/netlink.h>
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#include <netlink/route/link.h>
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#include <netlink/route/link/bridge.h>
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#define TEST_BRIDGE_NAME "testbridge"
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#define TEST_INTERFACE_NAME "testtap1"
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int create_bridge(struct nl_sock *sk, struct nl_cache *link_cache, const char *name) {
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struct rtnl_link *link;
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int err;
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link = rtnl_link_alloc();
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if ((err = rtnl_link_set_type(link, "bridge")) < 0) {
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rtnl_link_put(link);
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return err;
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}
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rtnl_link_set_name(link, name);
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if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
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return err;
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}
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rtnl_link_put(link);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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struct rtnl_link *link;
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struct nl_cache *link_cache;
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struct nl_sock *sk;
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int err;
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sk = nl_socket_alloc();
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if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
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nl_perror(err, "Unable to connect socket");
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return err;
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}
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if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
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nl_perror(err, "Unable to allocate cache");
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return err;
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}
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if ((err = create_bridge(sk, link_cache, TEST_BRIDGE_NAME)) < 0) {
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nl_perror(err, "Unable to allocate testbridge");
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return err;
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}
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nl_cache_refill(sk, link_cache);
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link = rtnl_link_get_by_name(link_cache, TEST_BRIDGE_NAME);
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struct rtnl_link *ltap = rtnl_link_get_by_name(link_cache, TEST_INTERFACE_NAME);
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if (!ltap) {
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fprintf(stderr, "You should create a tap interface before lunch this test (# tunctl -t %s)\n", TEST_INTERFACE_NAME);
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return -1;
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}
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if ((err = rtnl_link_enslave(sk, link, ltap)) < 0) {
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nl_perror(err, "Unable to enslave interface to his bridge\n");
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return err;
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}
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if(rtnl_link_is_bridge(link) == 0) {
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fprintf(stderr, "Link is not a bridge\n");
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return -2;
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}
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if(rtnl_link_get_master(ltap) <= 0) {
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fprintf(stderr, "Interface is not attached to a bridge\n");
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return -3;
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}
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rtnl_link_put(ltap);
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rtnl_link_put(link);
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nl_cache_free(link_cache);
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nl_socket_free(sk);
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return 0;
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}
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