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129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _NETLINK_NETLINK_SNL_ROUTE_H_
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#define _NETLINK_NETLINK_SNL_ROUTE_H_
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#include <netinet/in.h>
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/*
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* Simple Netlink Library - NETLINK_ROUTE helpers
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*/
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#define snl_alloc_sockaddr(_ss, _len) ((struct sockaddr *)(snl_allocz(_ss, _len)))
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static inline struct sockaddr *
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parse_rta_ip4(struct snl_state *ss, void *rta_data, int *perror)
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{
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struct sockaddr_in *sin;
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sin = (struct sockaddr_in *)snl_alloc_sockaddr(ss, sizeof(struct sockaddr_in));
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if (sin == NULL) {
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*perror = ENOBUFS;
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return (NULL);
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}
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sin->sin_len = sizeof(struct sockaddr_in);
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sin->sin_family = AF_INET;
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memcpy(&sin->sin_addr, rta_data, sizeof(struct in_addr));
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return ((struct sockaddr *)sin);
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}
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static inline struct sockaddr *
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parse_rta_ip6(struct snl_state *ss, void *rta_data, int *perror)
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{
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struct sockaddr_in6 *sin6;
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sin6 = (struct sockaddr_in6 *)snl_alloc_sockaddr(ss, sizeof(struct sockaddr_in6));
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if (sin6 == NULL) {
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*perror = ENOBUFS;
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return (NULL);
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}
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sin6->sin6_len = sizeof(struct sockaddr_in6);
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sin6->sin6_family = AF_INET6;
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memcpy(&sin6->sin6_addr, rta_data, sizeof(struct in6_addr));
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return ((struct sockaddr *)sin6);
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}
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static inline struct sockaddr *
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parse_rta_ip(struct snl_state *ss, struct rtattr *rta, int *perror)
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{
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void *rta_data = NL_RTA_DATA(rta);
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int rta_len = NL_RTA_DATA_LEN(rta);
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if (rta_len == sizeof(struct in_addr)) {
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return (parse_rta_ip4(ss, rta_data, perror));
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} else if (rta_len == sizeof(struct in6_addr)) {
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return (parse_rta_ip6(ss, rta_data, perror));
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} else {
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*perror = ENOTSUP;
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return (NULL);
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}
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return (NULL);
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}
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static inline bool
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snl_attr_get_ip(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)
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{
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int error = 0;
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struct sockaddr *sa = parse_rta_ip(ss, (struct rtattr *)nla, &error);
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if (error == 0) {
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*((struct sockaddr **)target) = sa;
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return (true);
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}
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return (false);
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}
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static inline struct sockaddr *
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parse_rta_via(struct snl_state *ss, struct rtattr *rta, int *perror)
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{
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struct rtvia *via = NL_RTA_DATA(rta);
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switch (via->rtvia_family) {
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case AF_INET:
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return (parse_rta_ip4(ss, via->rtvia_addr, perror));
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case AF_INET6:
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return (parse_rta_ip6(ss, via->rtvia_addr, perror));
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default:
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*perror = ENOTSUP;
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return (NULL);
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}
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}
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static inline bool
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snl_attr_get_ipvia(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)
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{
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int error = 0;
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struct sockaddr *sa = parse_rta_via(ss, (struct rtattr *)nla, &error);
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if (error == 0) {
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*((struct sockaddr **)target) = sa;
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return (true);
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}
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return (false);
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}
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#endif
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