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VILLASnode/include/villas/kernel/nl.hpp

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/** Netlink related functions.
*
* @file
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* 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 3 of the License, or
* 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, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
/** @addtogroup kernel Kernel
* @{
*/
#pragma once
#include <sys/socket.h>
#include <netlink/netlink.h>
#include <netlink/route/route.h>
#include <netlink/route/link.h>
namespace villas {
namespace kernel {
namespace nl {
/** Get index of outgoing interface for given destination address.
*
* @retval >=0 Interface index of outgoing interface.
* @retval <0 Error. Something went wrong.
*/
int get_egress(struct nl_addr *addr);
/** Lookup routing tables to get the interface on which packets for a certain destination
* will leave the system.
*
* @param[in] sa The destination address for outgoing packets.
* @param[out] link The egress interface.
* @retval 0 Success. Everything went well.
* @retval <0 Error. Something went wrong.
*/
struct rtnl_link * get_egress_link(struct sockaddr *sa);
/** Get or create global netlink socket. */
struct nl_sock * init();
/** Close and free global netlink socket. */
void shutdown();
} /* namespace nl */
} /* namespace kernel */
} /* namespace villas */
/** @} */