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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _NETLINK_NETLINK_SNL_ROUTE_H_
#define _NETLINK_NETLINK_SNL_ROUTE_H_
#include <netlink/netlink_snl.h>
#include <netlink/netlink_route.h>
#include <netinet/in.h>
/*
* Simple Netlink Library - NETLINK_ROUTE helpers
*/
static inline struct sockaddr *
parse_rta_ip4(struct snl_state *ss, void *rta_data, int *perror)
{
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)snl_allocz(ss, sizeof(struct sockaddr_in));
if (sin == NULL) {
*perror = ENOBUFS;
return (NULL);
}
sin->sin_len = sizeof(struct sockaddr_in);
sin->sin_family = AF_INET;
memcpy(&sin->sin_addr, rta_data, sizeof(struct in_addr));
return ((struct sockaddr *)sin);
}
static inline struct sockaddr *
parse_rta_ip6(struct snl_state *ss, void *rta_data, int *perror)
{
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)snl_allocz(ss, sizeof(struct sockaddr_in6));
if (sin6 == NULL) {
*perror = ENOBUFS;
return (NULL);
}
sin6->sin6_len = sizeof(struct sockaddr_in6);
sin6->sin6_family = AF_INET6;
memcpy(&sin6->sin6_addr, rta_data, sizeof(struct in6_addr));
return ((struct sockaddr *)sin6);
}
static inline struct sockaddr *
parse_rta_ip(struct snl_state *ss, struct rtattr *rta, int *perror)
{
void *rta_data = NL_RTA_DATA(rta);
int rta_len = NL_RTA_DATA_LEN(rta);
if (rta_len == sizeof(struct in_addr)) {
return (parse_rta_ip4(ss, rta_data, perror));
} else if (rta_len == sizeof(struct in6_addr)) {
return (parse_rta_ip6(ss, rta_data, perror));
} else {
*perror = ENOTSUP;
return (NULL);
}
return (NULL);
}
static inline bool
snl_attr_get_ip(struct snl_state *ss, struct nlattr *nla,
const void *arg __unused, void *target)
{
int error = 0;
struct sockaddr *sa = parse_rta_ip(ss, (struct rtattr *)nla, &error);
if (error == 0) {
*((struct sockaddr **)target) = sa;
return (true);
}
return (false);
}
static inline struct sockaddr *
parse_rta_via(struct snl_state *ss, struct rtattr *rta, int *perror)
{
struct rtvia *via = (struct rtvia *)NL_RTA_DATA(rta);
switch (via->rtvia_family) {
case AF_INET:
return (parse_rta_ip4(ss, via->rtvia_addr, perror));
case AF_INET6:
return (parse_rta_ip6(ss, via->rtvia_addr, perror));
default:
*perror = ENOTSUP;
return (NULL);
}
}
static inline bool
snl_attr_get_ipvia(struct snl_state *ss, struct nlattr *nla,
const void *arg __unused, void *target)
{
int error = 0;
struct sockaddr *sa = parse_rta_via(ss, (struct rtattr *)nla, &error);
if (error == 0) {
*((struct sockaddr **)target) = sa;
return (true);
}
return (false);
}
static inline bool
snl_add_msg_attr_ip4(struct snl_writer *nw, int attrtype, const struct in_addr *addr)
{
return (snl_add_msg_attr(nw, attrtype, 4, addr));
}
static inline bool
snl_add_msg_attr_ip6(struct snl_writer *nw, int attrtype, const struct in6_addr *addr)
{
return (snl_add_msg_attr(nw, attrtype, 16, addr));
}
static inline bool
snl_add_msg_attr_ip(struct snl_writer *nw, int attrtype, const struct sockaddr *sa)
{
const void *addr;
switch (sa->sa_family) {
case AF_INET:
addr = &((const struct sockaddr_in *)(const void *)sa)->sin_addr;
return (snl_add_msg_attr(nw, attrtype, 4, addr));
case AF_INET6:
addr = &((const struct sockaddr_in6 *)(const void *)sa)->sin6_addr;
return (snl_add_msg_attr(nw, attrtype, 16, addr));
}
return (false);
}
static inline bool
snl_add_msg_attr_ipvia(struct snl_writer *nw, int attrtype, const struct sockaddr *sa)
{
char buf[17];
buf[0] = sa->sa_family;
switch (sa->sa_family) {
case AF_INET:
memcpy(&buf[1], &((const struct sockaddr_in *)(const void *)sa)->sin_addr, 4);
return (snl_add_msg_attr(nw, attrtype, 5, buf));
case AF_INET6:
memcpy(&buf[1], &((const struct sockaddr_in6 *)(const void *)sa)->sin6_addr, 16);
return (snl_add_msg_attr(nw, attrtype, 17, buf));
}
return (false);
}
static inline bool
snl_attr_get_in_addr(struct snl_state *ss __unused, struct nlattr *nla,
const void *arg __unused, void *target)
{
if (NLA_DATA_LEN(nla) != sizeof(struct in_addr))
return (false);
memcpy(target, NLA_DATA_CONST(nla), sizeof(struct in_addr));
return (true);
}
static inline bool
snl_attr_get_in6_addr(struct snl_state *ss __unused, struct nlattr *nla,
const void *arg __unused, void *target)
{
if (NLA_DATA_LEN(nla) != sizeof(struct in6_addr))
return (false);
memcpy(target, NLA_DATA_CONST(nla), sizeof(struct in6_addr));
return (true);
}
#endif
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