16 void rtnl_close(struct rtnl_handle *rth)  in rtnl_close()  argument
18 	if (rth->fd >= 0) {  in rtnl_close()
19 		close(rth->fd);  in rtnl_close()
20 		rth->fd = -1;  in rtnl_close()
24 int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,  in rtnl_open_byproto()  argument
31 	memset(rth, 0, sizeof(*rth));  in rtnl_open_byproto()
32 	rth->proto = protocol;  in rtnl_open_byproto()
33 	rth->fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, protocol);  in rtnl_open_byproto()
34 	if (rth->fd < 0) {  in rtnl_open_byproto()
38 	if (setsockopt(rth->fd, SOL_SOCKET, SO_SNDBUF,  in rtnl_open_byproto()
43 	if (setsockopt(rth->fd, SOL_SOCKET, SO_RCVBUF,  in rtnl_open_byproto()
50 	setsockopt(rth->fd, SOL_NETLINK, NETLINK_EXT_ACK,  in rtnl_open_byproto()
53 	memset(&rth->local, 0, sizeof(rth->local));  in rtnl_open_byproto()
54 	rth->local.nl_family = AF_NETLINK;  in rtnl_open_byproto()
55 	rth->local.nl_groups = subscriptions;  in rtnl_open_byproto()
57 	if (bind(rth->fd, (struct sockaddr *)&rth->local,  in rtnl_open_byproto()
58 		 sizeof(rth->local)) < 0) {  in rtnl_open_byproto()
62 	addr_len = sizeof(rth->local);  in rtnl_open_byproto()
63 	if (getsockname(rth->fd, (struct sockaddr *)&rth->local,  in rtnl_open_byproto()
68 	if (addr_len != sizeof(rth->local)) {  in rtnl_open_byproto()
72 	if (rth->local.nl_family != AF_NETLINK) {  in rtnl_open_byproto()
74 			rth->local.nl_family);  in rtnl_open_byproto()
77 	rth->seq = time(NULL);  in rtnl_open_byproto()
80 	rtnl_close(rth);  in rtnl_open_byproto()
84 int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions)  in rtnl_open()  argument
86 	return rtnl_open_byproto(rth, subscriptions, NETLINK_ROUTE);  in rtnl_open()