2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #ifndef _NETLINK_NETLINK_SNL_ROUTE_H_
28 #define _NETLINK_NETLINK_SNL_ROUTE_H_
30 #include <netlink/netlink_snl.h>
31 #include <netlink/netlink_route.h>
32 #include <netinet/in.h>
35 * Simple Netlink Library - NETLINK_ROUTE helpers
38 static inline struct sockaddr *
39 parse_rta_ip4(struct snl_state *ss, void *rta_data, int *perror)
41 struct sockaddr_in *sin;
43 sin = (struct sockaddr_in *)snl_allocz(ss, sizeof(struct sockaddr_in));
48 sin->sin_len = sizeof(struct sockaddr_in);
49 sin->sin_family = AF_INET;
50 memcpy(&sin->sin_addr, rta_data, sizeof(struct in_addr));
51 return ((struct sockaddr *)sin);
54 static inline struct sockaddr *
55 parse_rta_ip6(struct snl_state *ss, void *rta_data, int *perror)
57 struct sockaddr_in6 *sin6;
59 sin6 = (struct sockaddr_in6 *)snl_allocz(ss, sizeof(struct sockaddr_in6));
64 sin6->sin6_len = sizeof(struct sockaddr_in6);
65 sin6->sin6_family = AF_INET6;
66 memcpy(&sin6->sin6_addr, rta_data, sizeof(struct in6_addr));
67 return ((struct sockaddr *)sin6);
70 static inline struct sockaddr *
71 parse_rta_ip(struct snl_state *ss, struct rtattr *rta, int *perror)
73 void *rta_data = NL_RTA_DATA(rta);
74 int rta_len = NL_RTA_DATA_LEN(rta);
76 if (rta_len == sizeof(struct in_addr)) {
77 return (parse_rta_ip4(ss, rta_data, perror));
78 } else if (rta_len == sizeof(struct in6_addr)) {
79 return (parse_rta_ip6(ss, rta_data, perror));
88 snl_attr_get_ip(struct snl_state *ss, struct nlattr *nla,
89 const void *arg __unused, void *target)
92 struct sockaddr *sa = parse_rta_ip(ss, (struct rtattr *)nla, &error);
94 *((struct sockaddr **)target) = sa;
100 static inline struct sockaddr *
101 parse_rta_via(struct snl_state *ss, struct rtattr *rta, int *perror)
103 struct rtvia *via = NL_RTA_DATA(rta);
105 switch (via->rtvia_family) {
107 return (parse_rta_ip4(ss, via->rtvia_addr, perror));
109 return (parse_rta_ip6(ss, via->rtvia_addr, perror));
117 snl_attr_get_ipvia(struct snl_state *ss, struct nlattr *nla,
118 const void *arg __unused, void *target)
122 struct sockaddr *sa = parse_rta_via(ss, (struct rtattr *)nla, &error);
124 *((struct sockaddr **)target) = sa;
131 snl_add_msg_attr_ip(struct snl_writer *nw, int attrtype, const struct sockaddr *sa)
135 switch (sa->sa_family) {
137 addr = &((const struct sockaddr_in *)(const void *)sa)->sin_addr;
138 return (snl_add_msg_attr(nw, attrtype, 4, addr));
140 addr = &((const struct sockaddr_in6 *)(const void *)sa)->sin6_addr;
141 return (snl_add_msg_attr(nw, attrtype, 16, addr));
148 snl_add_msg_attr_ipvia(struct snl_writer *nw, int attrtype, const struct sockaddr *sa)
152 buf[0] = sa->sa_family;
154 switch (sa->sa_family) {
156 memcpy(&buf[1], &((const struct sockaddr_in *)(const void *)sa)->sin_addr, 4);
157 return (snl_add_msg_attr(nw, attrtype, 5, buf));
159 memcpy(&buf[1], &((const struct sockaddr_in6 *)(const void *)sa)->sin6_addr, 16);
160 return (snl_add_msg_attr(nw, attrtype, 17, buf));