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/* Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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
(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, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include <sys/socket.h>
/*!
* \brief Get route to an IPv4/6 from system routing table.
*
* \param ip IPv4 or IPv6 to search route to.
* \param via Out: gateway (first hop) on the route, or AF_UNSPEC if same subnet.
* \param src Out: local outgoing IP address on the route.
* \param dev Out: local network interface on the route (you must pre-allocate IFNAMSIZ bytes!).
*
* \return 0 on success, negative errno otherwise.
*/
int ip_route_get(const struct sockaddr_storage *ip,
struct sockaddr_storage *via,
struct sockaddr_storage *src,
char *dev);
/*!
* \brief Obtain neighbour's MAC addr from system neighbour table.
*
* \param ip IPv4 or IPv6 of the neighbour in question.
* \param dummy_sendto Attempt sendto() to target IP in order to let the system fill the neighbour table.
* \param mac Out: MAC address of the neighbour (you must pre-allocate ETH_ALEN bytes!).
*
* \return 0 on success, -ENOENT if neighbour not found, negative errno otherwise.
*/
int ip_neigh_get(const struct sockaddr_storage *ip, bool dummy_sendto, uint8_t *mac);
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