69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/**
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* @file rtnl.h
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* @brief Interface link status via RT netlink
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* @note Copyright (C) 2012 Richard Cochran <richardcochran@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef HAVE_RTNL_H
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#define HAVE_RTNL_H
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#include <net/if.h>
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typedef void (*rtnl_callback)(void *ctx, int linkup, int ts_index);
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/**
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* Close a RT netlink socket.
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* @param fd A socket obtained via rtnl_open().
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* @return Zero on success, non-zero otherwise.
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*/
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int rtnl_close(int fd);
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/**
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* Get name of the slave interface which timestamps packets going through
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* a master interface (e.g. bond0)
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* @param device Name of the master interface.
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* @param ts_device Buffer for the name of the slave interface, which must be
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* at least IF_NAMESIZE bytes long.
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* @return Zero on success, or -1 on error.
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*/
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int rtnl_get_ts_device(const char *device, char ts_device[IF_NAMESIZE]);
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/**
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* Request the link status from the kernel.
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* @param fd A socket obtained via rtnl_open().
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* @param device Interface name. Request all iface's status if set NULL.
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* @return Zero on success, non-zero otherwise.
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*/
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int rtnl_link_query(int fd, const char *device);
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/**
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* Read kernel messages looking for a link up/down events.
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* @param fd Readable socket obtained via rtnl_open().
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* @param device The device which we need to get link info.
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* @param cb Callback function to be invoked on each event.
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* @param ctx Private context passed to the callback.
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* @return Zero on success, non-zero otherwise.
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*/
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int rtnl_link_status(int fd, const char *device, rtnl_callback cb, void *ctx);
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/**
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* Open a RT netlink socket for monitoring link state.
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* @return A valid socket, or -1 on error.
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*/
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int rtnl_open(void);
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#endif
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