+static int ll_link_get(const char *name, int index)
+{
+ struct {
+ struct nlmsghdr n;
+ struct ifinfomsg ifm;
+ char buf[1024];
+ } req = {
+ .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ .n.nlmsg_flags = NLM_F_REQUEST,
+ .n.nlmsg_type = RTM_GETLINK,
+ .ifm.ifi_index = index,
+ };
+ __u32 filt_mask = RTEXT_FILTER_VF | RTEXT_FILTER_SKIP_STATS;
+ struct rtnl_handle rth = {};
+ struct nlmsghdr *answer;
+ int rc = 0;
+
+ if (rtnl_open(&rth, 0) < 0)
+ return 0;
+
+ addattr32(&req.n, sizeof(req), IFLA_EXT_MASK, filt_mask);
+ if (name)
+ addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name,
+ strlen(name) + 1);
+
+ if (rtnl_talk(&rth, &req.n, &answer) < 0)
+ goto out;
+
+ /* add entry to cache */
+ rc = ll_remember_index(answer, NULL);
+ if (!rc) {
+ struct ifinfomsg *ifm = NLMSG_DATA(answer);
+
+ rc = ifm->ifi_index;
+ }
+
+ free(answer);
+out:
+ rtnl_close(&rth);
+ return rc;
+}
+