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.
20 /* These functions are Linux specific, so they should be used directly only by
21 * Linux-specific code. */
25 /* A digested version of an rtnetlink message sent down by the kernel to
26 * indicate that a network device has been created or destroyed or changed. */
27 struct rtnetlink_change {
28 /* Copied from struct nlmsghdr. */
29 int nlmsg_type; /* e.g. RTM_NEWLINK, RTM_DELLINK. */
31 /* Copied from struct ifinfomsg. */
32 int ifi_index; /* Index of network device. */
34 /* Extracted from Netlink attributes. */
35 const char *ifname; /* Name of network device. */
36 int master_ifindex; /* Ifindex of datapath master (0 if none). */
39 /* Function called to report that a netdev has changed. 'change' describes the
40 * specific change. It may be null if the buffer of change information
41 * overflowed, in which case the function must assume that every device may
42 * have changed. 'aux' is as specified in the call to
43 * rtnetlink_notifier_register(). */
44 typedef void rtnetlink_notify_func(const struct rtnetlink_change *, void *aux);
46 struct rtnetlink_notifier {
48 rtnetlink_notify_func *cb;
52 int rtnetlink_notifier_register(struct rtnetlink_notifier *,
53 rtnetlink_notify_func *, void *aux);
54 void rtnetlink_notifier_unregister(struct rtnetlink_notifier *);
55 void rtnetlink_notifier_run(void);
56 void rtnetlink_notifier_wait(void);
58 #endif /* rtnetlink.h */