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HardenedBSD/sys/netlink/netlink_snl_route_parsers.h
cnbatch ff92493a4f netlink: Fix C++ compile errors 
Allow these files to be included in C++ programs with careful casting to
the proper type, like C++ wants (and in a way that also works for C).

MFC After: 1 week
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1245
2024-05-24 22:31:42 -06:00

400 lines
15 KiB
C
Raw Blame History

/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2023 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_PARSERS_H_
#define _NETLINK_NETLINK_SNL_ROUTE_PARSERS_H_
#include <netlink/netlink_snl.h>
#include <netlink/netlink_snl_route.h>
#include <netlink/route/nexthop.h>
/* TODO: this file should be generated automatically */
static inline void
finalize_sockaddr(struct sockaddr *sa, uint32_t ifindex)
{
if (sa != NULL && sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)sa;
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
sin6->sin6_scope_id = ifindex;
}
}
/* RTM_<NEW|DEL|GET>ROUTE message parser */
struct rta_mpath_nh {
struct sockaddr *gw;
uint32_t ifindex;
uint8_t rtnh_flags;
uint8_t rtnh_weight;
uint32_t rtax_mtu;
uint32_t rta_rtflags;
};
#define _IN(_field) offsetof(struct rtnexthop, _field)
#define _OUT(_field) offsetof(struct rta_mpath_nh, _field)
static const struct snl_attr_parser _nla_p_mp_nh_metrics[] = {
{ .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 },
};
SNL_DECLARE_ATTR_PARSER(_metrics_mp_nh_parser, _nla_p_mp_nh_metrics);
static const struct snl_attr_parser _nla_p_mp_nh[] = {
{ .type = NL_RTA_GATEWAY, .off = _OUT(gw), .cb = snl_attr_get_ip },
{ .type = NL_RTA_METRICS, .arg = &_metrics_mp_nh_parser, .cb = snl_attr_get_nested },
{ .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_VIA, .off = _OUT(gw), .cb = snl_attr_get_ipvia },
};
static const struct snl_field_parser _fp_p_mp_nh[] = {
{ .off_in = _IN(rtnh_flags), .off_out = _OUT(rtnh_flags), .cb = snl_field_get_uint8 },
{ .off_in = _IN(rtnh_hops), .off_out = _OUT(rtnh_weight), .cb = snl_field_get_uint8 },
{ .off_in = _IN(rtnh_ifindex), .off_out = _OUT(ifindex), .cb = snl_field_get_uint32 },
};
static inline bool
_cb_p_mp_nh(struct snl_state *ss __unused, void *_target)
{
struct rta_mpath_nh *target = (struct rta_mpath_nh *)_target;
finalize_sockaddr(target->gw, target->ifindex);
return (true);
}
#undef _IN
#undef _OUT
SNL_DECLARE_PARSER_EXT(_mpath_nh_parser, sizeof(struct rtnexthop),
sizeof(struct rta_mpath_nh), _fp_p_mp_nh, _nla_p_mp_nh,
_cb_p_mp_nh);
struct rta_mpath {
uint32_t num_nhops;
struct rta_mpath_nh **nhops;
};
static bool
nlattr_get_multipath(struct snl_state *ss, struct nlattr *nla,
const void *arg __unused, void *target)
{
uint32_t start_size = 4;
while (start_size < NLA_DATA_LEN(nla) / sizeof(struct rtnexthop))
start_size *= 2;
return (snl_attr_get_parray_sz(ss, nla, start_size, &_mpath_nh_parser, target));
}
struct snl_parsed_route {
struct sockaddr *rta_dst;
struct sockaddr *rta_gw;
struct nlattr *rta_metrics;
struct rta_mpath rta_multipath;
uint32_t rta_expires;
uint32_t rta_oif;
uint32_t rta_expire;
uint32_t rta_table;
uint32_t rta_knh_id;
uint32_t rta_nh_id;
uint32_t rta_rtflags;
uint32_t rtax_mtu;
uint32_t rtax_weight;
uint8_t rtm_family;
uint8_t rtm_type;
uint8_t rtm_protocol;
uint8_t rtm_dst_len;
};
#define _IN(_field) offsetof(struct rtmsg, _field)
#define _OUT(_field) offsetof(struct snl_parsed_route, _field)
static const struct snl_attr_parser _nla_p_rtmetrics[] = {
{ .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 },
};
SNL_DECLARE_ATTR_PARSER(_metrics_parser, _nla_p_rtmetrics);
static const struct snl_attr_parser _nla_p_route[] = {
{ .type = NL_RTA_DST, .off = _OUT(rta_dst), .cb = snl_attr_get_ip },
{ .type = NL_RTA_OIF, .off = _OUT(rta_oif), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_GATEWAY, .off = _OUT(rta_gw), .cb = snl_attr_get_ip },
{ .type = NL_RTA_METRICS, .arg = &_metrics_parser, .cb = snl_attr_get_nested },
{ .type = NL_RTA_MULTIPATH, .off = _OUT(rta_multipath), .cb = nlattr_get_multipath },
{ .type = NL_RTA_KNH_ID, .off = _OUT(rta_knh_id), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_WEIGHT, .off = _OUT(rtax_weight), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_TABLE, .off = _OUT(rta_table), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_VIA, .off = _OUT(rta_gw), .cb = snl_attr_get_ipvia },
{ .type = NL_RTA_EXPIRES, .off = _OUT(rta_expire), .cb = snl_attr_get_uint32 },
{ .type = NL_RTA_NH_ID, .off = _OUT(rta_nh_id), .cb = snl_attr_get_uint32 },
};
static const struct snl_field_parser _fp_p_route[] = {
{.off_in = _IN(rtm_family), .off_out = _OUT(rtm_family), .cb = snl_field_get_uint8 },
{.off_in = _IN(rtm_type), .off_out = _OUT(rtm_type), .cb = snl_field_get_uint8 },
{.off_in = _IN(rtm_protocol), .off_out = _OUT(rtm_protocol), .cb = snl_field_get_uint8 },
{.off_in = _IN(rtm_dst_len), .off_out = _OUT(rtm_dst_len), .cb = snl_field_get_uint8 },
};
static inline bool
_cb_p_route(struct snl_state *ss __unused, void *_target)
{
struct snl_parsed_route *target = (struct snl_parsed_route *)_target;
finalize_sockaddr(target->rta_dst, target->rta_oif);
finalize_sockaddr(target->rta_gw, target->rta_oif);
return (true);
}
#undef _IN
#undef _OUT
SNL_DECLARE_PARSER_EXT(snl_rtm_route_parser, sizeof(struct rtmsg),
sizeof(struct snl_parsed_route), _fp_p_route, _nla_p_route,
_cb_p_route);
/* RTM_<NEW|DEL|GET>LINK message parser */
struct snl_parsed_link {
uint32_t ifi_index;
uint32_t ifi_flags;
uint32_t ifi_change;
uint16_t ifi_type;
uint8_t ifla_operstate;
uint8_t ifla_carrier;
uint32_t ifla_mtu;
char *ifla_ifname;
struct nlattr *ifla_address;
struct nlattr *ifla_broadcast;
char *ifla_ifalias;
uint32_t ifla_promiscuity;
struct rtnl_link_stats64 *ifla_stats64;
struct nlattr *iflaf_orig_hwaddr;
struct snl_attr_bitset iflaf_caps;
};
#define _IN(_field) offsetof(struct ifinfomsg, _field)
#define _OUT(_field) offsetof(struct snl_parsed_link, _field)
static const struct snl_attr_parser _nla_p_link_fbsd[] = {
{ .type = IFLAF_ORIG_HWADDR, .off = _OUT(iflaf_orig_hwaddr), .cb = snl_attr_dup_nla },
{ .type = IFLAF_CAPS, .off = _OUT(iflaf_caps), .cb = snl_attr_get_bitset_c },
};
SNL_DECLARE_ATTR_PARSER(_link_fbsd_parser, _nla_p_link_fbsd);
static const struct snl_attr_parser _nla_p_link[] = {
{ .type = IFLA_ADDRESS, .off = _OUT(ifla_address), .cb = snl_attr_dup_nla },
{ .type = IFLA_BROADCAST, .off = _OUT(ifla_broadcast), .cb = snl_attr_dup_nla },
{ .type = IFLA_IFNAME, .off = _OUT(ifla_ifname), .cb = snl_attr_dup_string },
{ .type = IFLA_MTU, .off = _OUT(ifla_mtu), .cb = snl_attr_get_uint32 },
{ .type = IFLA_OPERSTATE, .off = _OUT(ifla_operstate), .cb = snl_attr_get_uint8 },
{ .type = IFLA_IFALIAS, .off = _OUT(ifla_ifalias), .cb = snl_attr_dup_string },
{ .type = IFLA_STATS64, .off = _OUT(ifla_stats64), .cb = snl_attr_dup_struct },
{ .type = IFLA_PROMISCUITY, .off = _OUT(ifla_promiscuity), .cb = snl_attr_get_uint32 },
{ .type = IFLA_CARRIER, .off = _OUT(ifla_carrier), .cb = snl_attr_get_uint8 },
{ .type = IFLA_FREEBSD, .arg = &_link_fbsd_parser, .cb = snl_attr_get_nested },
};
static const struct snl_field_parser _fp_p_link[] = {
{.off_in = _IN(ifi_index), .off_out = _OUT(ifi_index), .cb = snl_field_get_uint32 },
{.off_in = _IN(ifi_flags), .off_out = _OUT(ifi_flags), .cb = snl_field_get_uint32 },
{.off_in = _IN(ifi_change), .off_out = _OUT(ifi_change), .cb = snl_field_get_uint32 },
{.off_in = _IN(ifi_type), .off_out = _OUT(ifi_type), .cb = snl_field_get_uint16 },
};
#undef _IN
#undef _OUT
SNL_DECLARE_PARSER(snl_rtm_link_parser, struct ifinfomsg, _fp_p_link, _nla_p_link);
struct snl_parsed_link_simple {
uint32_t ifi_index;
uint32_t ifla_mtu;
uint16_t ifi_type;
uint32_t ifi_flags;
char *ifla_ifname;
};
#define _IN(_field) offsetof(struct ifinfomsg, _field)
#define _OUT(_field) offsetof(struct snl_parsed_link_simple, _field)
static struct snl_attr_parser _nla_p_link_s[] = {
{ .type = IFLA_IFNAME, .off = _OUT(ifla_ifname), .cb = snl_attr_dup_string },
{ .type = IFLA_MTU, .off = _OUT(ifla_mtu), .cb = snl_attr_get_uint32 },
};
static struct snl_field_parser _fp_p_link_s[] = {
{.off_in = _IN(ifi_index), .off_out = _OUT(ifi_index), .cb = snl_field_get_uint32 },
{.off_in = _IN(ifi_type), .off_out = _OUT(ifi_type), .cb = snl_field_get_uint16 },
{.off_in = _IN(ifi_flags), .off_out = _OUT(ifi_flags), .cb = snl_field_get_uint32 },
};
#undef _IN
#undef _OUT
SNL_DECLARE_PARSER(snl_rtm_link_parser_simple, struct ifinfomsg, _fp_p_link_s, _nla_p_link_s);
struct snl_parsed_neigh {
uint8_t ndm_family;
uint8_t ndm_flags;
uint16_t ndm_state;
uint32_t nda_ifindex;
uint32_t nda_probes;
uint32_t ndaf_next_ts;
struct sockaddr *nda_dst;
struct nlattr *nda_lladdr;
};
#define _IN(_field) offsetof(struct ndmsg, _field)
#define _OUT(_field) offsetof(struct snl_parsed_neigh, _field)
static const struct snl_attr_parser _nla_p_neigh_fbsd[] = {
{ .type = NDAF_NEXT_STATE_TS, .off = _OUT(ndaf_next_ts), .cb = snl_attr_get_uint32 },
};
SNL_DECLARE_ATTR_PARSER(_neigh_fbsd_parser, _nla_p_neigh_fbsd);
static struct snl_attr_parser _nla_p_neigh_s[] = {
{ .type = NDA_DST, .off = _OUT(nda_dst), .cb = snl_attr_get_ip },
{ .type = NDA_LLADDR , .off = _OUT(nda_lladdr), .cb = snl_attr_dup_nla },
{ .type = NDA_PROBES, .off = _OUT(nda_probes), .cb = snl_attr_get_uint32 },
{ .type = NDA_IFINDEX, .off = _OUT(nda_ifindex), .cb = snl_attr_get_uint32 },
{ .type = NDA_FREEBSD, .arg = &_neigh_fbsd_parser, .cb = snl_attr_get_nested },
};
static struct snl_field_parser _fp_p_neigh_s[] = {
{.off_in = _IN(ndm_family), .off_out = _OUT(ndm_family), .cb = snl_field_get_uint8 },
{.off_in = _IN(ndm_flags), .off_out = _OUT(ndm_flags), .cb = snl_field_get_uint8 },
{.off_in = _IN(ndm_state), .off_out = _OUT(ndm_state), .cb = snl_field_get_uint16 },
{.off_in = _IN(ndm_ifindex), .off_out = _OUT(nda_ifindex), .cb = snl_field_get_uint32 },
};
static inline bool
_cb_p_neigh(struct snl_state *ss __unused, void *_target)
{
struct snl_parsed_neigh *target = (struct snl_parsed_neigh *)_target;
finalize_sockaddr(target->nda_dst, target->nda_ifindex);
return (true);
}
#undef _IN
#undef _OUT
SNL_DECLARE_PARSER_EXT(snl_rtm_neigh_parser, sizeof(struct ndmsg),
sizeof(struct snl_parsed_neigh), _fp_p_neigh_s, _nla_p_neigh_s,
_cb_p_neigh);
struct snl_parsed_addr {
uint8_t ifa_family;
uint8_t ifa_prefixlen;
uint32_t ifa_index;
struct sockaddr *ifa_local;
struct sockaddr *ifa_address;
struct sockaddr *ifa_broadcast;
char *ifa_label;
struct ifa_cacheinfo *ifa_cacheinfo;
uint32_t ifaf_vhid;
uint32_t ifaf_flags;
};
#define _IN(_field) offsetof(struct ifaddrmsg, _field)
#define _OUT(_field) offsetof(struct snl_parsed_addr, _field)
static const struct snl_attr_parser _nla_p_addr_fbsd[] = {
{ .type = IFAF_VHID, .off = _OUT(ifaf_vhid), .cb = snl_attr_get_uint32 },
{ .type = IFAF_FLAGS, .off = _OUT(ifaf_flags), .cb = snl_attr_get_uint32 },
};
SNL_DECLARE_ATTR_PARSER(_addr_fbsd_parser, _nla_p_addr_fbsd);
static const struct snl_attr_parser _nla_p_addr_s[] = {
{ .type = IFA_ADDRESS, .off = _OUT(ifa_address), .cb = snl_attr_get_ip },
{ .type = IFA_LOCAL, .off = _OUT(ifa_local), .cb = snl_attr_get_ip },
{ .type = IFA_LABEL, .off = _OUT(ifa_label), .cb = snl_attr_dup_string },
{ .type = IFA_BROADCAST, .off = _OUT(ifa_broadcast), .cb = snl_attr_get_ip },
{ .type = IFA_CACHEINFO, .off = _OUT(ifa_cacheinfo), .cb = snl_attr_dup_struct },
{ .type = IFA_FREEBSD, .arg = &_addr_fbsd_parser, .cb = snl_attr_get_nested },
};
static const struct snl_field_parser _fp_p_addr_s[] = {
{.off_in = _IN(ifa_family), .off_out = _OUT(ifa_family), .cb = snl_field_get_uint8 },
{.off_in = _IN(ifa_prefixlen), .off_out = _OUT(ifa_prefixlen), .cb = snl_field_get_uint8 },
{.off_in = _IN(ifa_index), .off_out = _OUT(ifa_index), .cb = snl_field_get_uint32 },
};
static inline bool
_cb_p_addr(struct snl_state *ss __unused, void *_target)
{
struct snl_parsed_addr *target = (struct snl_parsed_addr *)_target;
finalize_sockaddr(target->ifa_address, target->ifa_index);
finalize_sockaddr(target->ifa_local, target->ifa_index);
return (true);
}
#undef _IN
#undef _OUT
SNL_DECLARE_PARSER_EXT(snl_rtm_addr_parser, sizeof(struct ifaddrmsg),
sizeof(struct snl_parsed_addr), _fp_p_addr_s, _nla_p_addr_s,
_cb_p_addr);
struct snl_parsed_nhop {
uint32_t nha_id;
uint8_t nha_blackhole;
uint8_t nha_groups;
uint8_t nhaf_knhops;
uint8_t nhaf_family;
uint32_t nha_oif;
struct sockaddr *nha_gw;
uint8_t nh_family;
uint8_t nh_protocol;
uint32_t nhaf_table;
uint32_t nhaf_kid;
uint32_t nhaf_aif;
};
#define _IN(_field) offsetof(struct nhmsg, _field)
#define _OUT(_field) offsetof(struct snl_parsed_nhop, _field)
static struct snl_attr_parser _nla_p_nh_fbsd[] = {
{ .type = NHAF_KNHOPS, .off = _OUT(nhaf_knhops), .cb = snl_attr_get_flag },
{ .type = NHAF_TABLE, .off = _OUT(nhaf_table), .cb = snl_attr_get_uint32 },
{ .type = NHAF_KID, .off = _OUT(nhaf_kid), .cb = snl_attr_get_uint32 },
{ .type = NHAF_AIF, .off = _OUT(nhaf_aif), .cb = snl_attr_get_uint32 },
};
SNL_DECLARE_ATTR_PARSER(_nh_fbsd_parser, _nla_p_nh_fbsd);
static const struct snl_field_parser _fp_p_nh[] = {
{ .off_in = _IN(nh_family), .off_out = _OUT(nh_family), .cb = snl_field_get_uint8 },
{ .off_in = _IN(nh_protocol), .off_out = _OUT(nh_protocol), .cb = snl_field_get_uint8 },
};
static const struct snl_attr_parser _nla_p_nh[] = {
{ .type = NHA_ID, .off = _OUT(nha_id), .cb = snl_attr_get_uint32 },
{ .type = NHA_BLACKHOLE, .off = _OUT(nha_blackhole), .cb = snl_attr_get_flag },
{ .type = NHA_OIF, .off = _OUT(nha_oif), .cb = snl_attr_get_uint32 },
{ .type = NHA_GATEWAY, .off = _OUT(nha_gw), .cb = snl_attr_get_ip },
{ .type = NHA_FREEBSD, .arg = &_nh_fbsd_parser, .cb = snl_attr_get_nested },
};
static inline bool
_cb_p_nh(struct snl_state *ss __unused, void *_target)
{
struct snl_parsed_nhop *target = (struct snl_parsed_nhop *)_target;
finalize_sockaddr(target->nha_gw, target->nha_oif);
return (true);
}
#undef _IN
#undef _OUT
SNL_DECLARE_PARSER_EXT(snl_nhmsg_parser, sizeof(struct nhmsg),
sizeof(struct snl_parsed_nhop), _fp_p_nh, _nla_p_nh, _cb_p_nh);
static const struct snl_hdr_parser *snl_all_route_parsers[] = {
&_metrics_mp_nh_parser, &_mpath_nh_parser, &_metrics_parser, &snl_rtm_route_parser,
&_link_fbsd_parser, &snl_rtm_link_parser, &snl_rtm_link_parser_simple,
&_neigh_fbsd_parser, &snl_rtm_neigh_parser,
&_addr_fbsd_parser, &snl_rtm_addr_parser, &_nh_fbsd_parser, &snl_nhmsg_parser,
};
#endif
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