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/*
* Copyright (c) 2009 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef RTNETLINK_H
#define RTNETLINK_H 1
/* These functions are Linux specific, so they should be used directly only by
* Linux-specific code. */
#include "list.h"
/* A digested version of an rtnetlink message sent down by the kernel to
* indicate that a network device has been created or destroyed or changed. */
struct rtnetlink_change {
/* Copied from struct nlmsghdr. */
int nlmsg_type; /* e.g. RTM_NEWLINK, RTM_DELLINK. */
/* Copied from struct ifinfomsg. */
int ifi_index; /* Index of network device. */
/* Extracted from Netlink attributes. */
const char *ifname; /* Name of network device. */
int master_ifindex; /* Ifindex of datapath master (0 if none). */
};
/* Function called to report that a netdev has changed. 'change' describes the
* specific change. It may be null if the buffer of change information
* overflowed, in which case the function must assume that every device may
* have changed. 'aux' is as specified in the call to
* rtnetlink_notifier_register(). */
typedef void rtnetlink_notify_func(const struct rtnetlink_change *, void *aux);
struct rtnetlink_notifier {
struct list node;
rtnetlink_notify_func *cb;
void *aux;
};
int rtnetlink_notifier_register(struct rtnetlink_notifier *,
rtnetlink_notify_func *, void *aux);
void rtnetlink_notifier_unregister(struct rtnetlink_notifier *);
void rtnetlink_notifier_run(void);
void rtnetlink_notifier_wait(void);
#endif /* rtnetlink.h */
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