1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2023 Alexander V. Chernikov <melifaro@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 14 * 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 25 * SUCH DAMAGE. 26 */ 27 #ifndef _NETLINK_NETLINK_SNL_ROUTE_PARSERS_H_ 28 #define _NETLINK_NETLINK_SNL_ROUTE_PARSERS_H_ 29 30 #include <netlink/netlink_snl.h> 31 #include <netlink/netlink_snl_route.h> 32 33 /* TODO: this file should be generated automatically */ 34 35 /* RTM_<NEW|DEL|GET>ROUTE message parser */ 36 37 struct rta_mpath_nh { 38 struct sockaddr *gw; 39 uint32_t ifindex; 40 uint8_t rtnh_flags; 41 uint8_t rtnh_weight; 42 uint32_t rtax_mtu; 43 uint32_t rta_rtflags; 44 }; 45 46 #define _IN(_field) offsetof(struct rtnexthop, _field) 47 #define _OUT(_field) offsetof(struct rta_mpath_nh, _field) 48 static const struct snl_attr_parser _nla_p_mp_nh_metrics[] = { 49 { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 }, 50 }; 51 SNL_DECLARE_ATTR_PARSER(_metrics_mp_nh_parser, _nla_p_mp_nh_metrics); 52 53 static const struct snl_attr_parser _nla_p_mp_nh[] = { 54 { .type = NL_RTA_GATEWAY, .off = _OUT(gw), .cb = snl_attr_get_ip }, 55 { .type = NL_RTA_METRICS, .arg = &_metrics_mp_nh_parser, .cb = snl_attr_get_nested }, 56 { .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 }, 57 { .type = NL_RTA_VIA, .off = _OUT(gw), .cb = snl_attr_get_ipvia }, 58 }; 59 60 static const struct snl_field_parser _fp_p_mp_nh[] = { 61 { .off_in = _IN(rtnh_flags), .off_out = _OUT(rtnh_flags), .cb = snl_field_get_uint8 }, 62 { .off_in = _IN(rtnh_hops), .off_out = _OUT(rtnh_weight), .cb = snl_field_get_uint8 }, 63 { .off_in = _IN(rtnh_ifindex), .off_out = _OUT(ifindex), .cb = snl_field_get_uint32 }, 64 }; 65 #undef _IN 66 #undef _OUT 67 SNL_DECLARE_PARSER(_mpath_nh_parser, struct rtnexthop, _fp_p_mp_nh, _nla_p_mp_nh); 68 69 struct rta_mpath { 70 int num_nhops; 71 struct rta_mpath_nh nhops[0]; 72 }; 73 74 static bool 75 nlattr_get_multipath(struct snl_state *ss, struct nlattr *nla, const void *arg __unused, 76 void *target) 77 { 78 int data_len = nla->nla_len - sizeof(struct nlattr); 79 struct rtnexthop *rtnh; 80 81 int max_nhops = data_len / sizeof(struct rtnexthop); 82 size_t sz = (max_nhops + 2) * sizeof(struct rta_mpath_nh); 83 84 struct rta_mpath *mp = snl_allocz(ss, sz); 85 if (mp == NULL) 86 return (false); 87 mp->num_nhops = 0; 88 89 for (rtnh = (struct rtnexthop *)(void *)(nla + 1); data_len > 0; ) { 90 struct rta_mpath_nh *mpnh = &mp->nhops[mp->num_nhops++]; 91 92 if (!snl_parse_header(ss, rtnh, rtnh->rtnh_len, &_mpath_nh_parser, mpnh)) 93 return (false); 94 95 int len = NL_ITEM_ALIGN(rtnh->rtnh_len); 96 data_len -= len; 97 rtnh = (struct rtnexthop *)(void *)((char *)rtnh + len); 98 } 99 if (data_len != 0 || mp->num_nhops == 0) { 100 return (false); 101 } 102 103 *((struct rta_mpath **)target) = mp; 104 return (true); 105 } 106 107 struct snl_parsed_route { 108 struct sockaddr *rta_dst; 109 struct sockaddr *rta_gw; 110 struct nlattr *rta_metrics; 111 struct rta_mpath *rta_multipath; 112 uint32_t rta_expires; 113 uint32_t rta_oif; 114 uint32_t rta_expire; 115 uint32_t rta_table; 116 uint32_t rta_knh_id; 117 uint32_t rta_nh_id; 118 uint32_t rta_rtflags; 119 uint32_t rtax_mtu; 120 uint32_t rtax_weight; 121 uint8_t rtm_family; 122 uint8_t rtm_type; 123 uint8_t rtm_protocol; 124 uint8_t rtm_dst_len; 125 }; 126 127 #define _IN(_field) offsetof(struct rtmsg, _field) 128 #define _OUT(_field) offsetof(struct snl_parsed_route, _field) 129 static const struct snl_attr_parser _nla_p_rtmetrics[] = { 130 { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 }, 131 }; 132 SNL_DECLARE_ATTR_PARSER(_metrics_parser, _nla_p_rtmetrics); 133 134 static const struct snl_attr_parser _nla_p_route[] = { 135 { .type = NL_RTA_DST, .off = _OUT(rta_dst), .cb = snl_attr_get_ip }, 136 { .type = NL_RTA_OIF, .off = _OUT(rta_oif), .cb = snl_attr_get_uint32 }, 137 { .type = NL_RTA_GATEWAY, .off = _OUT(rta_gw), .cb = snl_attr_get_ip }, 138 { .type = NL_RTA_METRICS, .arg = &_metrics_parser, .cb = snl_attr_get_nested }, 139 { .type = NL_RTA_MULTIPATH, .off = _OUT(rta_multipath), .cb = nlattr_get_multipath }, 140 { .type = NL_RTA_KNH_ID, .off = _OUT(rta_knh_id), .cb = snl_attr_get_uint32 }, 141 { .type = NL_RTA_WEIGHT, .off = _OUT(rtax_weight), .cb = snl_attr_get_uint32 }, 142 { .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 }, 143 { .type = NL_RTA_TABLE, .off = _OUT(rta_table), .cb = snl_attr_get_uint32 }, 144 { .type = NL_RTA_VIA, .off = _OUT(rta_gw), .cb = snl_attr_get_ipvia }, 145 { .type = NL_RTA_EXPIRES, .off = _OUT(rta_expire), .cb = snl_attr_get_uint32 }, 146 { .type = NL_RTA_NH_ID, .off = _OUT(rta_nh_id), .cb = snl_attr_get_uint32 }, 147 }; 148 149 static const struct snl_field_parser _fp_p_route[] = { 150 {.off_in = _IN(rtm_family), .off_out = _OUT(rtm_family), .cb = snl_field_get_uint8 }, 151 {.off_in = _IN(rtm_type), .off_out = _OUT(rtm_type), .cb = snl_field_get_uint8 }, 152 {.off_in = _IN(rtm_protocol), .off_out = _OUT(rtm_protocol), .cb = snl_field_get_uint8 }, 153 {.off_in = _IN(rtm_dst_len), .off_out = _OUT(rtm_dst_len), .cb = snl_field_get_uint8 }, 154 }; 155 #undef _IN 156 #undef _OUT 157 SNL_DECLARE_PARSER(snl_rtm_route_parser, struct rtmsg, _fp_p_route, _nla_p_route); 158 159 /* RTM_<NEW|DEL|GET>LINK message parser */ 160 struct snl_parsed_link { 161 uint32_t ifi_index; 162 uint32_t ifi_flags; 163 uint32_t ifi_change; 164 uint16_t ifi_type; 165 uint8_t ifla_operstate; 166 uint8_t ifla_carrier; 167 uint32_t ifla_mtu; 168 char *ifla_ifname; 169 struct nlattr *ifla_address; 170 struct nlattr *ifla_broadcast; 171 char *ifla_ifalias; 172 uint32_t ifla_promiscuity; 173 struct rtnl_link_stats64 *ifla_stats64; 174 }; 175 176 #define _IN(_field) offsetof(struct ifinfomsg, _field) 177 #define _OUT(_field) offsetof(struct snl_parsed_link, _field) 178 static const struct snl_attr_parser _nla_p_link[] = { 179 { .type = IFLA_ADDRESS, .off = _OUT(ifla_address), .cb = snl_attr_get_nla }, 180 { .type = IFLA_BROADCAST, .off = _OUT(ifla_broadcast), .cb = snl_attr_get_nla }, 181 { .type = IFLA_IFNAME, .off = _OUT(ifla_ifname), .cb = snl_attr_get_string }, 182 { .type = IFLA_MTU, .off = _OUT(ifla_mtu), .cb = snl_attr_get_uint32 }, 183 { .type = IFLA_OPERSTATE, .off = _OUT(ifla_operstate), .cb = snl_attr_get_uint8 }, 184 { .type = IFLA_IFALIAS, .off = _OUT(ifla_ifalias), .cb = snl_attr_get_string }, 185 { .type = IFLA_STATS64, .off = _OUT(ifla_stats64), .cb = snl_attr_copy_struct }, 186 { .type = IFLA_PROMISCUITY, .off = _OUT(ifla_promiscuity), .cb = snl_attr_get_uint32 }, 187 { .type = IFLA_CARRIER, .off = _OUT(ifla_carrier), .cb = snl_attr_get_uint8 }, 188 }; 189 static const struct snl_field_parser _fp_p_link[] = { 190 {.off_in = _IN(ifi_index), .off_out = _OUT(ifi_index), .cb = snl_field_get_uint32 }, 191 {.off_in = _IN(ifi_flags), .off_out = _OUT(ifi_flags), .cb = snl_field_get_uint32 }, 192 {.off_in = _IN(ifi_change), .off_out = _OUT(ifi_change), .cb = snl_field_get_uint32 }, 193 {.off_in = _IN(ifi_type), .off_out = _OUT(ifi_type), .cb = snl_field_get_uint16 }, 194 }; 195 #undef _IN 196 #undef _OUT 197 SNL_DECLARE_PARSER(snl_rtm_link_parser, struct ifinfomsg, _fp_p_link, _nla_p_link); 198 199 struct snl_parsed_link_simple { 200 uint32_t ifi_index; 201 uint32_t ifla_mtu; 202 uint16_t ifi_type; 203 uint32_t ifi_flags; 204 char *ifla_ifname; 205 }; 206 207 #define _IN(_field) offsetof(struct ifinfomsg, _field) 208 #define _OUT(_field) offsetof(struct snl_parsed_link_simple, _field) 209 static struct snl_attr_parser _nla_p_link_s[] = { 210 { .type = IFLA_IFNAME, .off = _OUT(ifla_ifname), .cb = snl_attr_get_string }, 211 { .type = IFLA_MTU, .off = _OUT(ifla_mtu), .cb = snl_attr_get_uint32 }, 212 }; 213 static struct snl_field_parser _fp_p_link_s[] = { 214 {.off_in = _IN(ifi_index), .off_out = _OUT(ifi_index), .cb = snl_field_get_uint32 }, 215 {.off_in = _IN(ifi_type), .off_out = _OUT(ifi_type), .cb = snl_field_get_uint16 }, 216 {.off_in = _IN(ifi_flags), .off_out = _OUT(ifi_flags), .cb = snl_field_get_uint32 }, 217 }; 218 #undef _IN 219 #undef _OUT 220 SNL_DECLARE_PARSER(snl_rtm_link_parser_simple, struct ifinfomsg, _fp_p_link_s, _nla_p_link_s); 221 222 struct snl_parsed_neigh { 223 uint8_t ndm_family; 224 uint8_t ndm_flags; 225 uint16_t ndm_state; 226 uint32_t nda_ifindex; 227 struct sockaddr *nda_dst; 228 struct nlattr *nda_lladdr; 229 }; 230 231 #define _IN(_field) offsetof(struct ndmsg, _field) 232 #define _OUT(_field) offsetof(struct snl_parsed_neigh, _field) 233 static struct snl_attr_parser _nla_p_neigh_s[] = { 234 { .type = NDA_DST, .off = _OUT(nda_dst), .cb = snl_attr_get_ip }, 235 { .type = NDA_LLADDR , .off = _OUT(nda_lladdr), .cb = snl_attr_get_nla }, 236 { .type = NDA_IFINDEX, .off = _OUT(nda_ifindex), .cb = snl_attr_get_uint32 }, 237 }; 238 static struct snl_field_parser _fp_p_neigh_s[] = { 239 {.off_in = _IN(ndm_family), .off_out = _OUT(ndm_family), .cb = snl_field_get_uint8 }, 240 {.off_in = _IN(ndm_flags), .off_out = _OUT(ndm_flags), .cb = snl_field_get_uint8 }, 241 {.off_in = _IN(ndm_state), .off_out = _OUT(ndm_state), .cb = snl_field_get_uint16 }, 242 }; 243 #undef _IN 244 #undef _OUT 245 SNL_DECLARE_PARSER(snl_rtm_neigh_parser, struct ndmsg, _fp_p_neigh_s, _nla_p_neigh_s); 246 247 struct snl_parsed_addr { 248 uint8_t ifa_family; 249 uint8_t ifa_prefixlen; 250 uint32_t ifa_index; 251 struct sockaddr *ifa_local; 252 struct sockaddr *ifa_address; 253 struct sockaddr *ifa_broadcast; 254 char *ifa_label; 255 }; 256 257 #define _IN(_field) offsetof(struct ifaddrmsg, _field) 258 #define _OUT(_field) offsetof(struct snl_parsed_addr, _field) 259 static struct snl_attr_parser _nla_p_addr_s[] = { 260 { .type = IFA_ADDRESS, .off = _OUT(ifa_address), .cb = snl_attr_get_ip }, 261 { .type = IFA_LOCAL, .off = _OUT(ifa_local), .cb = snl_attr_get_ip }, 262 { .type = IFA_LABEL, .off = _OUT(ifa_label), .cb = snl_attr_get_string }, 263 { .type = IFA_BROADCAST, .off = _OUT(ifa_broadcast), .cb = snl_attr_get_ip }, 264 }; 265 static struct snl_field_parser _fp_p_addr_s[] = { 266 {.off_in = _IN(ifa_family), .off_out = _OUT(ifa_family), .cb = snl_field_get_uint8 }, 267 {.off_in = _IN(ifa_prefixlen), .off_out = _OUT(ifa_prefixlen), .cb = snl_field_get_uint8 }, 268 {.off_in = _IN(ifa_index), .off_out = _OUT(ifa_index), .cb = snl_field_get_uint32 }, 269 }; 270 #undef _IN 271 #undef _OUT 272 SNL_DECLARE_PARSER(snl_rtm_addr_parser, struct ifaddrmsg, _fp_p_addr_s, _nla_p_addr_s); 273 274 static const struct snl_hdr_parser *snl_all_route_parsers[] = { 275 &_metrics_mp_nh_parser, &_mpath_nh_parser, &_metrics_parser, &snl_rtm_route_parser, 276 &snl_rtm_link_parser, &snl_rtm_link_parser_simple, &snl_rtm_neigh_parser, 277 &snl_rtm_addr_parser, 278 }; 279 280 #endif 281