+int sd_rtnl_new_from_netlink(sd_rtnl **ret, int fd) {
+ _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ socklen_t addrlen;
+ int r;
+
+ assert_return(ret, -EINVAL);
+
+ r = sd_rtnl_new(ret);
+ if (r < 0)
+ return r;
+
+ addrlen = sizeof(rtnl->sockaddr);
+
+ r = getsockname(fd, &rtnl->sockaddr.sa, &addrlen);
+ if (r < 0)
+ return -errno;
+
+ rtnl->fd = fd;
+
+ *ret = rtnl;
+ rtnl = NULL;
+
+ return 0;
+}
+