2 * Copyright (c) 2009 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef RTNETLINK_LINK_H
18 #define RTNETLINK_LINK_H 1
23 struct rtnetlink_notifier;
25 /* These functions are Linux specific, so they should be used directly only by
26 * Linux-specific code. */
28 /* A digested version of an rtnetlink_link message sent down by the kernel to
29 * indicate that a network device has been created, destroyed or changed. */
30 struct rtnetlink_link_change {
31 /* Copied from struct nlmsghdr. */
32 int nlmsg_type; /* e.g. RTM_NEWLINK, RTM_DELLINK. */
34 /* Copied from struct ifinfomsg. */
35 int ifi_index; /* Index of network device. */
37 /* Extracted from Netlink attributes. */
38 const char *ifname; /* Name of network device. */
39 int master_ifindex; /* Ifindex of datapath master (0 if none). */
42 /* Function called to report that a netdev has changed. 'change' describes the
43 * specific change. It may be null if the buffer of change information
44 * overflowed, in which case the function must assume that every device may
45 * have changed. 'aux' is as specified in the call to
46 * rtnetlink_link_notifier_register(). */
48 void rtnetlink_link_notify_func(const struct rtnetlink_link_change *change,
51 bool rtnetlink_link_parse(struct ofpbuf *buf,
52 struct rtnetlink_link_change *change);
53 int rtnetlink_link_notifier_register(struct rtnetlink_notifier *,
54 rtnetlink_link_notify_func *, void *aux);
55 void rtnetlink_link_notifier_unregister(struct rtnetlink_notifier *);
56 void rtnetlink_link_notifier_run(void);
57 void rtnetlink_link_notifier_wait(void);
58 #endif /* rtnetlink-link.h */