55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
|
/**
|
||
|
|
* @file rtnl.h
|
||
|
|
* @brief Interface link status via RT netlink
|
||
|
|
* @note Copyright (C) 2012 Richard Cochran <richardcochran@gmail.com>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along
|
||
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
*/
|
||
|
|
#ifndef HAVE_RTNL_H
|
||
|
|
#define HAVE_RTNL_H
|
||
|
|
|
||
|
|
typedef void (*rtnl_callback)(void *ctx, int index, int linkup);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Close a RT netlink socket.
|
||
|
|
* @param fd A socket obtained via rtnl_open().
|
||
|
|
* @return Zero on success, non-zero otherwise.
|
||
|
|
*/
|
||
|
|
int rtnl_close(int fd);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Request the link status from the kernel.
|
||
|
|
* @param fd A socket obtained via rtnl_open().
|
||
|
|
* @return Zero on success, non-zero otherwise.
|
||
|
|
*/
|
||
|
|
int rtnl_link_query(int fd);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Read kernel messages looking for a link up/down events.
|
||
|
|
* @param fd Readable socket obtained via rtnl_open().
|
||
|
|
* @param cb Callback function to be invoked on each event.
|
||
|
|
* @param ctx Private context passed to the callback.
|
||
|
|
* @return Zero on success, non-zero otherwise.
|
||
|
|
*/
|
||
|
|
int rtnl_link_status(int fd, rtnl_callback cb, void *ctx);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Open a RT netlink socket for monitoring link state.
|
||
|
|
* @return A valid socket, or -1 on error.
|
||
|
|
*/
|
||
|
|
int rtnl_open(void);
|
||
|
|
|
||
|
|
#endif
|