2 * Copyright (c) 2009 Nicira, Inc.
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
22 #include <linux/if_ether.h>
27 /* These functions are Linux specific, so they should be used directly only by
28 * Linux-specific code. */
30 /* A digested version of an rtnetlink_link message sent down by the kernel to
31 * indicate that a network device has been created, destroyed or changed. */
32 struct rtnetlink_link_change {
33 /* Copied from struct nlmsghdr. */
34 int nlmsg_type; /* e.g. RTM_NEWLINK, RTM_DELLINK. */
36 /* Copied from struct ifinfomsg. */
37 int ifi_index; /* Index of network device. */
39 /* Extracted from Netlink attributes. */
40 const char *ifname; /* Name of network device. */
41 int master_ifindex; /* Ifindex of datapath master (0 if none). */
42 int mtu; /* Current MTU. */
43 uint8_t addr[ETH_ALEN];
44 unsigned int ifi_flags; /* Flags of network device. */
47 /* Function called to report that a netdev has changed. 'change' describes the
48 * specific change. It may be null if the buffer of change information
49 * overflowed, in which case the function must assume that every device may
50 * have changed. 'aux' is as specified in the call to
51 * rtnetlink_link_notifier_register(). */
53 void rtnetlink_link_notify_func(const struct rtnetlink_link_change *change,
56 bool rtnetlink_link_parse(struct ofpbuf *buf,
57 struct rtnetlink_link_change *change);
59 rtnetlink_link_notifier_create(rtnetlink_link_notify_func *, void *aux);
60 void rtnetlink_link_notifier_destroy(struct nln_notifier *);
61 void rtnetlink_link_run(void);
62 void rtnetlink_link_wait(void);
63 #endif /* rtnetlink-link.h */