| File: | src/usr.sbin/bgpctl/mrtparser.c |
| Warning: | line 615, column 2 Value stored to 'len' is never read |
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| 1 | /* $OpenBSD: mrtparser.c,v 1.16 2021/09/22 18:17:49 claudio Exp $ */ |
| 2 | /* |
| 3 | * Copyright (c) 2011 Claudio Jeker <claudio@openbsd.org> |
| 4 | * |
| 5 | * Permission to use, copy, modify, and distribute this software for any |
| 6 | * purpose with or without fee is hereby granted, provided that the above |
| 7 | * copyright notice and this permission notice appear in all copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 16 | */ |
| 17 | #include <sys/types.h> |
| 18 | #include <sys/socket.h> |
| 19 | #include <netinet/in.h> |
| 20 | #include <err.h> |
| 21 | #include <errno(*__errno()).h> |
| 22 | #include <limits.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #include <time.h> |
| 27 | #include <unistd.h> |
| 28 | |
| 29 | #include "mrt.h" |
| 30 | #include "mrtparser.h" |
| 31 | |
| 32 | void *mrt_read_msg(int, struct mrt_hdr *); |
| 33 | size_t mrt_read_buf(int, void *, size_t); |
| 34 | |
| 35 | struct mrt_peer *mrt_parse_v2_peer(struct mrt_hdr *, void *); |
| 36 | struct mrt_rib *mrt_parse_v2_rib(struct mrt_hdr *, void *, int); |
| 37 | int mrt_parse_dump(struct mrt_hdr *, void *, struct mrt_peer **, |
| 38 | struct mrt_rib **); |
| 39 | int mrt_parse_dump_mp(struct mrt_hdr *, void *, struct mrt_peer **, |
| 40 | struct mrt_rib **, int); |
| 41 | int mrt_extract_attr(struct mrt_rib_entry *, u_char *, int, u_int8_t, |
| 42 | int); |
| 43 | |
| 44 | void mrt_free_peers(struct mrt_peer *); |
| 45 | void mrt_free_rib(struct mrt_rib *); |
| 46 | void mrt_free_bgp_state(struct mrt_bgp_state *); |
| 47 | void mrt_free_bgp_msg(struct mrt_bgp_msg *); |
| 48 | |
| 49 | u_char *mrt_aspath_inflate(void *, u_int16_t, u_int16_t *); |
| 50 | int mrt_extract_addr(void *, u_int, struct bgpd_addr *, u_int8_t); |
| 51 | int mrt_extract_prefix(void *, u_int, u_int8_t, struct bgpd_addr *, |
| 52 | u_int8_t *, int); |
| 53 | |
| 54 | struct mrt_bgp_state *mrt_parse_state(struct mrt_hdr *, void *, int); |
| 55 | struct mrt_bgp_msg *mrt_parse_msg(struct mrt_hdr *, void *, int); |
| 56 | |
| 57 | void * |
| 58 | mrt_read_msg(int fd, struct mrt_hdr *hdr) |
| 59 | { |
| 60 | void *buf; |
| 61 | |
| 62 | bzero(hdr, sizeof(*hdr)); |
| 63 | if (mrt_read_buf(fd, hdr, sizeof(*hdr)) != sizeof(*hdr)) |
| 64 | return (NULL((void *)0)); |
| 65 | |
| 66 | if ((buf = malloc(ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length )))) == NULL((void *)0)) |
| 67 | err(1, "malloc(%d)", hdr->length); |
| 68 | |
| 69 | if (mrt_read_buf(fd, buf, ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length ))) != ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length ))) { |
| 70 | free(buf); |
| 71 | return (NULL((void *)0)); |
| 72 | } |
| 73 | return (buf); |
| 74 | } |
| 75 | |
| 76 | size_t |
| 77 | mrt_read_buf(int fd, void *buf, size_t len) |
| 78 | { |
| 79 | char *b = buf; |
| 80 | ssize_t n; |
| 81 | |
| 82 | while (len > 0) { |
| 83 | if ((n = read(fd, b, len)) == -1) { |
| 84 | if (errno(*__errno()) == EINTR4) |
| 85 | continue; |
| 86 | err(1, "read"); |
| 87 | } |
| 88 | if (n == 0) |
| 89 | break; |
| 90 | b += n; |
| 91 | len -= n; |
| 92 | } |
| 93 | |
| 94 | return (b - (char *)buf); |
| 95 | } |
| 96 | |
| 97 | void |
| 98 | mrt_parse(int fd, struct mrt_parser *p, int verbose) |
| 99 | { |
| 100 | struct mrt_hdr h; |
| 101 | struct mrt_peer *pctx = NULL((void *)0); |
| 102 | struct mrt_rib *r; |
| 103 | struct mrt_bgp_state *s; |
| 104 | struct mrt_bgp_msg *m; |
| 105 | void *msg; |
| 106 | |
| 107 | while ((msg = mrt_read_msg(fd, &h))) { |
| 108 | switch (ntohs(h.type)(__uint16_t)(__builtin_constant_p(h.type) ? (__uint16_t)(((__uint16_t )(h.type) & 0xffU) << 8 | ((__uint16_t)(h.type) & 0xff00U) >> 8) : __swap16md(h.type))) { |
| 109 | case MSG_NULL: |
| 110 | case MSG_START: |
| 111 | case MSG_DIE: |
| 112 | case MSG_I_AM_DEAD: |
| 113 | case MSG_PEER_DOWN: |
| 114 | case MSG_PROTOCOL_BGP: |
| 115 | case MSG_PROTOCOL_IDRP: |
| 116 | case MSG_PROTOCOL_BGP4PLUS: |
| 117 | case MSG_PROTOCOL_BGP4PLUS1: |
| 118 | if (verbose) |
| 119 | printf("deprecated MRT type %d\n", |
| 120 | ntohs(h.type)(__uint16_t)(__builtin_constant_p(h.type) ? (__uint16_t)(((__uint16_t )(h.type) & 0xffU) << 8 | ((__uint16_t)(h.type) & 0xff00U) >> 8) : __swap16md(h.type))); |
| 121 | break; |
| 122 | case MSG_PROTOCOL_RIP: |
| 123 | case MSG_PROTOCOL_RIPNG: |
| 124 | case MSG_PROTOCOL_OSPF: |
| 125 | case MSG_PROTOCOL_ISIS_ET: |
| 126 | case MSG_PROTOCOL_ISIS: |
| 127 | case MSG_PROTOCOL_OSPFV3_ET: |
| 128 | case MSG_PROTOCOL_OSPFV3: |
| 129 | if (verbose) |
| 130 | printf("unsuported MRT type %d\n", |
| 131 | ntohs(h.type)(__uint16_t)(__builtin_constant_p(h.type) ? (__uint16_t)(((__uint16_t )(h.type) & 0xffU) << 8 | ((__uint16_t)(h.type) & 0xff00U) >> 8) : __swap16md(h.type))); |
| 132 | break; |
| 133 | case MSG_TABLE_DUMP: |
| 134 | switch (ntohs(h.subtype)(__uint16_t)(__builtin_constant_p(h.subtype) ? (__uint16_t)(( (__uint16_t)(h.subtype) & 0xffU) << 8 | ((__uint16_t )(h.subtype) & 0xff00U) >> 8) : __swap16md(h.subtype ))) { |
| 135 | case MRT_DUMP_AFI_IP: |
| 136 | case MRT_DUMP_AFI_IPv6: |
| 137 | if (p->dump == NULL((void *)0)) |
| 138 | break; |
| 139 | if (mrt_parse_dump(&h, msg, &pctx, &r) == 0) { |
| 140 | if (p->dump) |
| 141 | p->dump(r, pctx, p->arg); |
| 142 | mrt_free_rib(r); |
| 143 | } |
| 144 | break; |
| 145 | default: |
| 146 | if (verbose) |
| 147 | printf("unknown AFI %d in table dump\n", |
| 148 | ntohs(h.subtype)(__uint16_t)(__builtin_constant_p(h.subtype) ? (__uint16_t)(( (__uint16_t)(h.subtype) & 0xffU) << 8 | ((__uint16_t )(h.subtype) & 0xff00U) >> 8) : __swap16md(h.subtype ))); |
| 149 | break; |
| 150 | } |
| 151 | break; |
| 152 | case MSG_TABLE_DUMP_V2: |
| 153 | switch (ntohs(h.subtype)(__uint16_t)(__builtin_constant_p(h.subtype) ? (__uint16_t)(( (__uint16_t)(h.subtype) & 0xffU) << 8 | ((__uint16_t )(h.subtype) & 0xff00U) >> 8) : __swap16md(h.subtype ))) { |
| 154 | case MRT_DUMP_V2_PEER_INDEX_TABLE: |
| 155 | if (p->dump == NULL((void *)0)) |
| 156 | break; |
| 157 | if (pctx) |
| 158 | mrt_free_peers(pctx); |
| 159 | pctx = mrt_parse_v2_peer(&h, msg); |
| 160 | break; |
| 161 | case MRT_DUMP_V2_RIB_IPV4_UNICAST: |
| 162 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST: |
| 163 | case MRT_DUMP_V2_RIB_IPV6_UNICAST: |
| 164 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST: |
| 165 | case MRT_DUMP_V2_RIB_GENERIC: |
| 166 | case MRT_DUMP_V2_RIB_IPV4_UNICAST_ADDPATH: |
| 167 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST_ADDPATH: |
| 168 | case MRT_DUMP_V2_RIB_IPV6_UNICAST_ADDPATH: |
| 169 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST_ADDPATH: |
| 170 | case MRT_DUMP_V2_RIB_GENERIC_ADDPATH: |
| 171 | if (p->dump == NULL((void *)0)) |
| 172 | break; |
| 173 | r = mrt_parse_v2_rib(&h, msg, verbose); |
| 174 | if (r) { |
| 175 | if (p->dump) |
| 176 | p->dump(r, pctx, p->arg); |
| 177 | mrt_free_rib(r); |
| 178 | } |
| 179 | break; |
| 180 | default: |
| 181 | if (verbose) |
| 182 | printf("unhandled DUMP_V2 subtype %d\n", |
| 183 | ntohs(h.subtype)(__uint16_t)(__builtin_constant_p(h.subtype) ? (__uint16_t)(( (__uint16_t)(h.subtype) & 0xffU) << 8 | ((__uint16_t )(h.subtype) & 0xff00U) >> 8) : __swap16md(h.subtype ))); |
| 184 | break; |
| 185 | } |
| 186 | break; |
| 187 | case MSG_PROTOCOL_BGP4MP_ET: |
| 188 | case MSG_PROTOCOL_BGP4MP: |
| 189 | switch (ntohs(h.subtype)(__uint16_t)(__builtin_constant_p(h.subtype) ? (__uint16_t)(( (__uint16_t)(h.subtype) & 0xffU) << 8 | ((__uint16_t )(h.subtype) & 0xff00U) >> 8) : __swap16md(h.subtype ))) { |
| 190 | case BGP4MP_STATE_CHANGE: |
| 191 | case BGP4MP_STATE_CHANGE_AS4: |
| 192 | if ((s = mrt_parse_state(&h, msg, verbose))) { |
| 193 | if (p->state) |
| 194 | p->state(s, p->arg); |
| 195 | free(s); |
| 196 | } |
| 197 | break; |
| 198 | case BGP4MP_MESSAGE: |
| 199 | case BGP4MP_MESSAGE_AS4: |
| 200 | case BGP4MP_MESSAGE_LOCAL: |
| 201 | case BGP4MP_MESSAGE_AS4_LOCAL: |
| 202 | case BGP4MP_MESSAGE_ADDPATH: |
| 203 | case BGP4MP_MESSAGE_AS4_ADDPATH: |
| 204 | case BGP4MP_MESSAGE_LOCAL_ADDPATH: |
| 205 | case BGP4MP_MESSAGE_AS4_LOCAL_ADDPATH: |
| 206 | if ((m = mrt_parse_msg(&h, msg, verbose))) { |
| 207 | if (p->message) |
| 208 | p->message(m, p->arg); |
| 209 | free(m->msg); |
| 210 | free(m); |
| 211 | } |
| 212 | break; |
| 213 | case BGP4MP_ENTRY: |
| 214 | if (p->dump == NULL((void *)0)) |
| 215 | break; |
| 216 | if (mrt_parse_dump_mp(&h, msg, &pctx, &r, |
| 217 | verbose) == 0) { |
| 218 | if (p->dump) |
| 219 | p->dump(r, pctx, p->arg); |
| 220 | mrt_free_rib(r); |
| 221 | } |
| 222 | break; |
| 223 | default: |
| 224 | if (verbose) |
| 225 | printf("unhandled BGP4MP subtype %d\n", |
| 226 | ntohs(h.subtype)(__uint16_t)(__builtin_constant_p(h.subtype) ? (__uint16_t)(( (__uint16_t)(h.subtype) & 0xffU) << 8 | ((__uint16_t )(h.subtype) & 0xff00U) >> 8) : __swap16md(h.subtype ))); |
| 227 | break; |
| 228 | } |
| 229 | break; |
| 230 | default: |
| 231 | if (verbose) |
| 232 | printf("unknown MRT type %d\n", ntohs(h.type)(__uint16_t)(__builtin_constant_p(h.type) ? (__uint16_t)(((__uint16_t )(h.type) & 0xffU) << 8 | ((__uint16_t)(h.type) & 0xff00U) >> 8) : __swap16md(h.type))); |
| 233 | break; |
| 234 | } |
| 235 | free(msg); |
| 236 | } |
| 237 | if (pctx) |
| 238 | mrt_free_peers(pctx); |
| 239 | } |
| 240 | |
| 241 | static int |
| 242 | mrt_afi2aid(int afi, int safi, int verbose) |
| 243 | { |
| 244 | switch (afi) { |
| 245 | case MRT_DUMP_AFI_IP: |
| 246 | if (safi == -1 || safi == 1 || safi == 2) |
| 247 | return AID_INET1; |
| 248 | else if (safi == 128) |
| 249 | return AID_VPN_IPv43; |
| 250 | break; |
| 251 | case MRT_DUMP_AFI_IPv6: |
| 252 | if (safi == -1 || safi == 1 || safi == 2) |
| 253 | return AID_INET62; |
| 254 | else if (safi == 128) |
| 255 | return AID_VPN_IPv64; |
| 256 | break; |
| 257 | default: |
| 258 | break; |
| 259 | } |
| 260 | if (verbose) |
| 261 | printf("unhandled AFI/SAFI %d/%d\n", afi, safi); |
| 262 | return AID_UNSPEC0; |
| 263 | } |
| 264 | |
| 265 | struct mrt_peer * |
| 266 | mrt_parse_v2_peer(struct mrt_hdr *hdr, void *msg) |
| 267 | { |
| 268 | struct mrt_peer_entry *peers = NULL((void *)0); |
| 269 | struct mrt_peer *p; |
| 270 | u_int8_t *b = msg; |
| 271 | u_int32_t bid, as4; |
| 272 | u_int16_t cnt, i, as2; |
| 273 | u_int len = ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length )); |
| 274 | |
| 275 | if (len < 8) /* min msg size */ |
| 276 | return NULL((void *)0); |
| 277 | |
| 278 | p = calloc(1, sizeof(struct mrt_peer)); |
| 279 | if (p == NULL((void *)0)) |
| 280 | err(1, "calloc"); |
| 281 | |
| 282 | /* collector bgp id */ |
| 283 | memcpy(&bid, b, sizeof(bid)); |
| 284 | b += sizeof(bid); |
| 285 | len -= sizeof(bid); |
| 286 | p->bgp_id = ntohl(bid)(__uint32_t)(__builtin_constant_p(bid) ? (__uint32_t)(((__uint32_t )(bid) & 0xff) << 24 | ((__uint32_t)(bid) & 0xff00 ) << 8 | ((__uint32_t)(bid) & 0xff0000) >> 8 | ((__uint32_t)(bid) & 0xff000000) >> 24) : __swap32md (bid)); |
| 287 | |
| 288 | /* view name length */ |
| 289 | memcpy(&cnt, b, sizeof(cnt)); |
| 290 | b += sizeof(cnt); |
| 291 | len -= sizeof(cnt); |
| 292 | cnt = ntohs(cnt)(__uint16_t)(__builtin_constant_p(cnt) ? (__uint16_t)(((__uint16_t )(cnt) & 0xffU) << 8 | ((__uint16_t)(cnt) & 0xff00U ) >> 8) : __swap16md(cnt)); |
| 293 | |
| 294 | /* view name */ |
| 295 | if (cnt > len) |
| 296 | goto fail; |
| 297 | if (cnt != 0) { |
| 298 | if ((p->view = malloc(cnt + 1)) == NULL((void *)0)) |
| 299 | err(1, "malloc"); |
| 300 | memcpy(p->view, b, cnt); |
| 301 | p->view[cnt] = 0; |
| 302 | } else |
| 303 | if ((p->view = strdup("")) == NULL((void *)0)) |
| 304 | err(1, "strdup"); |
| 305 | b += cnt; |
| 306 | len -= cnt; |
| 307 | |
| 308 | /* peer_count */ |
| 309 | if (len < sizeof(cnt)) |
| 310 | goto fail; |
| 311 | memcpy(&cnt, b, sizeof(cnt)); |
| 312 | b += sizeof(cnt); |
| 313 | len -= sizeof(cnt); |
| 314 | cnt = ntohs(cnt)(__uint16_t)(__builtin_constant_p(cnt) ? (__uint16_t)(((__uint16_t )(cnt) & 0xffU) << 8 | ((__uint16_t)(cnt) & 0xff00U ) >> 8) : __swap16md(cnt)); |
| 315 | |
| 316 | /* peer entries */ |
| 317 | if ((peers = calloc(cnt, sizeof(struct mrt_peer_entry))) == NULL((void *)0)) |
| 318 | err(1, "calloc"); |
| 319 | for (i = 0; i < cnt; i++) { |
| 320 | u_int8_t type; |
| 321 | |
| 322 | if (len < sizeof(u_int8_t) + sizeof(u_int32_t)) |
| 323 | goto fail; |
| 324 | type = *b++; |
| 325 | len -= 1; |
| 326 | memcpy(&bid, b, sizeof(bid)); |
| 327 | b += sizeof(bid); |
| 328 | len -= sizeof(bid); |
| 329 | peers[i].bgp_id = ntohl(bid)(__uint32_t)(__builtin_constant_p(bid) ? (__uint32_t)(((__uint32_t )(bid) & 0xff) << 24 | ((__uint32_t)(bid) & 0xff00 ) << 8 | ((__uint32_t)(bid) & 0xff0000) >> 8 | ((__uint32_t)(bid) & 0xff000000) >> 24) : __swap32md (bid)); |
| 330 | |
| 331 | if (type & MRT_DUMP_V2_PEER_BIT_I0x1) { |
| 332 | if (mrt_extract_addr(b, len, &peers[i].addr, |
| 333 | AID_INET62) == -1) |
| 334 | goto fail; |
| 335 | b += sizeof(struct in6_addr); |
| 336 | len -= sizeof(struct in6_addr); |
| 337 | } else { |
| 338 | if (mrt_extract_addr(b, len, &peers[i].addr, |
| 339 | AID_INET1) == -1) |
| 340 | goto fail; |
| 341 | b += sizeof(struct in_addr); |
| 342 | len -= sizeof(struct in_addr); |
| 343 | } |
| 344 | |
| 345 | if (type & MRT_DUMP_V2_PEER_BIT_A0x2) { |
| 346 | memcpy(&as4, b, sizeof(as4)); |
| 347 | b += sizeof(as4); |
| 348 | len -= sizeof(as4); |
| 349 | as4 = ntohl(as4)(__uint32_t)(__builtin_constant_p(as4) ? (__uint32_t)(((__uint32_t )(as4) & 0xff) << 24 | ((__uint32_t)(as4) & 0xff00 ) << 8 | ((__uint32_t)(as4) & 0xff0000) >> 8 | ((__uint32_t)(as4) & 0xff000000) >> 24) : __swap32md (as4)); |
| 350 | } else { |
| 351 | memcpy(&as2, b, sizeof(as2)); |
| 352 | b += sizeof(as2); |
| 353 | len -= sizeof(as2); |
| 354 | as4 = ntohs(as2)(__uint16_t)(__builtin_constant_p(as2) ? (__uint16_t)(((__uint16_t )(as2) & 0xffU) << 8 | ((__uint16_t)(as2) & 0xff00U ) >> 8) : __swap16md(as2)); |
| 355 | } |
| 356 | peers[i].asnum = as4; |
| 357 | } |
| 358 | p->peers = peers; |
| 359 | p->npeers = cnt; |
| 360 | return (p); |
| 361 | fail: |
| 362 | mrt_free_peers(p); |
| 363 | free(peers); |
| 364 | return (NULL((void *)0)); |
| 365 | } |
| 366 | |
| 367 | struct mrt_rib * |
| 368 | mrt_parse_v2_rib(struct mrt_hdr *hdr, void *msg, int verbose) |
| 369 | { |
| 370 | struct mrt_rib_entry *entries = NULL((void *)0); |
| 371 | struct mrt_rib *r; |
| 372 | u_int8_t *b = msg; |
| 373 | u_int len = ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length )); |
| 374 | u_int32_t snum, path_id = 0; |
| 375 | u_int16_t cnt, i, afi; |
| 376 | u_int8_t safi, aid; |
| 377 | int ret; |
| 378 | |
| 379 | if (len < sizeof(snum) + 1) |
| 380 | return NULL((void *)0); |
| 381 | |
| 382 | r = calloc(1, sizeof(struct mrt_rib)); |
| 383 | if (r == NULL((void *)0)) |
| 384 | err(1, "calloc"); |
| 385 | |
| 386 | /* seq_num */ |
| 387 | memcpy(&snum, b, sizeof(snum)); |
| 388 | b += sizeof(snum); |
| 389 | len -= sizeof(snum); |
| 390 | r->seqnum = ntohl(snum)(__uint32_t)(__builtin_constant_p(snum) ? (__uint32_t)(((__uint32_t )(snum) & 0xff) << 24 | ((__uint32_t)(snum) & 0xff00 ) << 8 | ((__uint32_t)(snum) & 0xff0000) >> 8 | ((__uint32_t)(snum) & 0xff000000) >> 24) : __swap32md (snum)); |
| 391 | |
| 392 | switch (ntohs(hdr->subtype)(__uint16_t)(__builtin_constant_p(hdr->subtype) ? (__uint16_t )(((__uint16_t)(hdr->subtype) & 0xffU) << 8 | (( __uint16_t)(hdr->subtype) & 0xff00U) >> 8) : __swap16md (hdr->subtype))) { |
| 393 | case MRT_DUMP_V2_RIB_IPV4_UNICAST_ADDPATH: |
| 394 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST_ADDPATH: |
| 395 | r->add_path = 1; |
| 396 | /* FALLTHROUGH */ |
| 397 | case MRT_DUMP_V2_RIB_IPV4_UNICAST: |
| 398 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST: |
| 399 | /* prefix */ |
| 400 | ret = mrt_extract_prefix(b, len, AID_INET1, &r->prefix, |
| 401 | &r->prefixlen, verbose); |
| 402 | if (ret == 1) |
| 403 | goto fail; |
| 404 | break; |
| 405 | case MRT_DUMP_V2_RIB_IPV6_UNICAST_ADDPATH: |
| 406 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST_ADDPATH: |
| 407 | r->add_path = 1; |
| 408 | /* FALLTHROUGH */ |
| 409 | case MRT_DUMP_V2_RIB_IPV6_UNICAST: |
| 410 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST: |
| 411 | /* prefix */ |
| 412 | ret = mrt_extract_prefix(b, len, AID_INET62, &r->prefix, |
| 413 | &r->prefixlen, verbose); |
| 414 | if (ret == 1) |
| 415 | goto fail; |
| 416 | break; |
| 417 | case MRT_DUMP_V2_RIB_GENERIC_ADDPATH: |
| 418 | /* |
| 419 | * RFC8050 handling for add-path has special handling for |
| 420 | * RIB_GENERIC_ADDPATH but nobody implements it that way. |
| 421 | * So just use the same way as for the other _ADDPATH types. |
| 422 | */ |
| 423 | r->add_path = 1; |
| 424 | /* FALLTHROUGH */ |
| 425 | case MRT_DUMP_V2_RIB_GENERIC: |
| 426 | /* fetch AFI/SAFI pair */ |
| 427 | if (len < 3) |
| 428 | goto fail; |
| 429 | memcpy(&afi, b, sizeof(afi)); |
| 430 | b += sizeof(afi); |
| 431 | len -= sizeof(afi); |
| 432 | afi = ntohs(afi)(__uint16_t)(__builtin_constant_p(afi) ? (__uint16_t)(((__uint16_t )(afi) & 0xffU) << 8 | ((__uint16_t)(afi) & 0xff00U ) >> 8) : __swap16md(afi)); |
| 433 | |
| 434 | safi = *b++; |
| 435 | len -= 1; |
| 436 | |
| 437 | if ((aid = mrt_afi2aid(afi, safi, verbose)) == AID_UNSPEC0) |
| 438 | goto fail; |
| 439 | |
| 440 | /* prefix */ |
| 441 | ret = mrt_extract_prefix(b, len, aid, &r->prefix, |
| 442 | &r->prefixlen, verbose); |
| 443 | if (ret == 1) |
| 444 | goto fail; |
| 445 | break; |
| 446 | default: |
| 447 | errx(1, "unknonw subtype %hd", ntohs(hdr->subtype)(__uint16_t)(__builtin_constant_p(hdr->subtype) ? (__uint16_t )(((__uint16_t)(hdr->subtype) & 0xffU) << 8 | (( __uint16_t)(hdr->subtype) & 0xff00U) >> 8) : __swap16md (hdr->subtype))); |
| 448 | } |
| 449 | |
| 450 | /* adjust length */ |
| 451 | b += ret; |
| 452 | len -= ret; |
| 453 | |
| 454 | /* entries count */ |
| 455 | if (len < sizeof(cnt)) |
| 456 | goto fail; |
| 457 | memcpy(&cnt, b, sizeof(cnt)); |
| 458 | b += sizeof(cnt); |
| 459 | len -= sizeof(cnt); |
| 460 | cnt = ntohs(cnt)(__uint16_t)(__builtin_constant_p(cnt) ? (__uint16_t)(((__uint16_t )(cnt) & 0xffU) << 8 | ((__uint16_t)(cnt) & 0xff00U ) >> 8) : __swap16md(cnt)); |
| 461 | r->nentries = cnt; |
| 462 | |
| 463 | /* entries */ |
| 464 | if ((entries = calloc(cnt, sizeof(struct mrt_rib_entry))) == NULL((void *)0)) |
| 465 | err(1, "calloc"); |
| 466 | for (i = 0; i < cnt; i++) { |
| 467 | u_int32_t otm; |
| 468 | u_int16_t pix, alen; |
| 469 | if (len < 2 * sizeof(u_int16_t) + sizeof(u_int32_t)) |
| 470 | goto fail; |
| 471 | /* peer index */ |
| 472 | memcpy(&pix, b, sizeof(pix)); |
| 473 | b += sizeof(pix); |
| 474 | len -= sizeof(pix); |
| 475 | entries[i].peer_idx = ntohs(pix)(__uint16_t)(__builtin_constant_p(pix) ? (__uint16_t)(((__uint16_t )(pix) & 0xffU) << 8 | ((__uint16_t)(pix) & 0xff00U ) >> 8) : __swap16md(pix)); |
| 476 | |
| 477 | /* originated */ |
| 478 | memcpy(&otm, b, sizeof(otm)); |
| 479 | b += sizeof(otm); |
| 480 | len -= sizeof(otm); |
| 481 | entries[i].originated = ntohl(otm)(__uint32_t)(__builtin_constant_p(otm) ? (__uint32_t)(((__uint32_t )(otm) & 0xff) << 24 | ((__uint32_t)(otm) & 0xff00 ) << 8 | ((__uint32_t)(otm) & 0xff0000) >> 8 | ((__uint32_t)(otm) & 0xff000000) >> 24) : __swap32md (otm)); |
| 482 | |
| 483 | if (r->add_path) { |
| 484 | if (len < sizeof(path_id) + sizeof(alen)) |
| 485 | goto fail; |
| 486 | memcpy(&path_id, b, sizeof(path_id)); |
| 487 | b += sizeof(path_id); |
| 488 | len -= sizeof(path_id); |
| 489 | path_id = ntohl(path_id)(__uint32_t)(__builtin_constant_p(path_id) ? (__uint32_t)(((__uint32_t )(path_id) & 0xff) << 24 | ((__uint32_t)(path_id) & 0xff00) << 8 | ((__uint32_t)(path_id) & 0xff0000) >> 8 | ((__uint32_t)(path_id) & 0xff000000) >> 24) : __swap32md (path_id)); |
| 490 | } |
| 491 | entries[i].path_id = path_id; |
| 492 | |
| 493 | /* attr_len */ |
| 494 | memcpy(&alen, b, sizeof(alen)); |
| 495 | b += sizeof(alen); |
| 496 | len -= sizeof(alen); |
| 497 | alen = ntohs(alen)(__uint16_t)(__builtin_constant_p(alen) ? (__uint16_t)(((__uint16_t )(alen) & 0xffU) << 8 | ((__uint16_t)(alen) & 0xff00U ) >> 8) : __swap16md(alen)); |
| 498 | |
| 499 | /* attr */ |
| 500 | if (len < alen) |
| 501 | goto fail; |
| 502 | if (mrt_extract_attr(&entries[i], b, alen, |
| 503 | r->prefix.aid, 1) == -1) |
| 504 | goto fail; |
| 505 | b += alen; |
| 506 | len -= alen; |
| 507 | } |
| 508 | r->entries = entries; |
| 509 | return (r); |
| 510 | fail: |
| 511 | mrt_free_rib(r); |
| 512 | free(entries); |
| 513 | return (NULL((void *)0)); |
| 514 | } |
| 515 | |
| 516 | int |
| 517 | mrt_parse_dump(struct mrt_hdr *hdr, void *msg, struct mrt_peer **pp, |
| 518 | struct mrt_rib **rp) |
| 519 | { |
| 520 | struct mrt_peer *p; |
| 521 | struct mrt_rib *r; |
| 522 | struct mrt_rib_entry *re; |
| 523 | u_int8_t *b = msg; |
| 524 | u_int len = ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length )); |
| 525 | u_int16_t asnum, alen; |
| 526 | |
| 527 | if (*pp == NULL((void *)0)) { |
| 528 | *pp = calloc(1, sizeof(struct mrt_peer)); |
| 529 | if (*pp == NULL((void *)0)) |
| 530 | err(1, "calloc"); |
| 531 | (*pp)->peers = calloc(1, sizeof(struct mrt_peer_entry)); |
| 532 | if ((*pp)->peers == NULL((void *)0)) |
| 533 | err(1, "calloc"); |
| 534 | (*pp)->npeers = 1; |
| 535 | } |
| 536 | p = *pp; |
| 537 | |
| 538 | *rp = r = calloc(1, sizeof(struct mrt_rib)); |
| 539 | if (r == NULL((void *)0)) |
| 540 | err(1, "calloc"); |
| 541 | re = calloc(1, sizeof(struct mrt_rib_entry)); |
| 542 | if (re == NULL((void *)0)) |
| 543 | err(1, "calloc"); |
| 544 | r->nentries = 1; |
| 545 | r->entries = re; |
| 546 | |
| 547 | if (len < 2 * sizeof(u_int16_t)) |
| 548 | goto fail; |
| 549 | /* view */ |
| 550 | b += sizeof(u_int16_t); |
| 551 | len -= sizeof(u_int16_t); |
| 552 | /* seqnum */ |
| 553 | memcpy(&r->seqnum, b, sizeof(u_int16_t)); |
| 554 | b += sizeof(u_int16_t); |
| 555 | len -= sizeof(u_int16_t); |
| 556 | r->seqnum = ntohs(r->seqnum)(__uint16_t)(__builtin_constant_p(r->seqnum) ? (__uint16_t )(((__uint16_t)(r->seqnum) & 0xffU) << 8 | ((__uint16_t )(r->seqnum) & 0xff00U) >> 8) : __swap16md(r-> seqnum)); |
| 557 | |
| 558 | switch (ntohs(hdr->subtype)(__uint16_t)(__builtin_constant_p(hdr->subtype) ? (__uint16_t )(((__uint16_t)(hdr->subtype) & 0xffU) << 8 | (( __uint16_t)(hdr->subtype) & 0xff00U) >> 8) : __swap16md (hdr->subtype))) { |
| 559 | case MRT_DUMP_AFI_IP: |
| 560 | if (mrt_extract_addr(b, len, &r->prefix, AID_INET1) == -1) |
| 561 | goto fail; |
| 562 | b += sizeof(struct in_addr); |
| 563 | len -= sizeof(struct in_addr); |
| 564 | break; |
| 565 | case MRT_DUMP_AFI_IPv6: |
| 566 | if (mrt_extract_addr(b, len, &r->prefix, AID_INET62) == -1) |
| 567 | goto fail; |
| 568 | b += sizeof(struct in6_addr); |
| 569 | len -= sizeof(struct in6_addr); |
| 570 | break; |
| 571 | } |
| 572 | if (len < 2 * sizeof(u_int32_t) + 2 * sizeof(u_int16_t) + 2) |
| 573 | goto fail; |
| 574 | r->prefixlen = *b++; |
| 575 | len -= 1; |
| 576 | /* status */ |
| 577 | b += 1; |
| 578 | len -= 1; |
| 579 | /* originated */ |
| 580 | memcpy(&re->originated, b, sizeof(u_int32_t)); |
| 581 | b += sizeof(u_int32_t); |
| 582 | len -= sizeof(u_int32_t); |
| 583 | re->originated = ntohl(re->originated)(__uint32_t)(__builtin_constant_p(re->originated) ? (__uint32_t )(((__uint32_t)(re->originated) & 0xff) << 24 | ( (__uint32_t)(re->originated) & 0xff00) << 8 | (( __uint32_t)(re->originated) & 0xff0000) >> 8 | ( (__uint32_t)(re->originated) & 0xff000000) >> 24 ) : __swap32md(re->originated)); |
| 584 | /* peer ip */ |
| 585 | switch (ntohs(hdr->subtype)(__uint16_t)(__builtin_constant_p(hdr->subtype) ? (__uint16_t )(((__uint16_t)(hdr->subtype) & 0xffU) << 8 | (( __uint16_t)(hdr->subtype) & 0xff00U) >> 8) : __swap16md (hdr->subtype))) { |
| 586 | case MRT_DUMP_AFI_IP: |
| 587 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET1) == -1) |
| 588 | goto fail; |
| 589 | b += sizeof(struct in_addr); |
| 590 | len -= sizeof(struct in_addr); |
| 591 | break; |
| 592 | case MRT_DUMP_AFI_IPv6: |
| 593 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET62) == -1) |
| 594 | goto fail; |
| 595 | b += sizeof(struct in6_addr); |
| 596 | len -= sizeof(struct in6_addr); |
| 597 | break; |
| 598 | } |
| 599 | memcpy(&asnum, b, sizeof(asnum)); |
| 600 | b += sizeof(asnum); |
| 601 | len -= sizeof(asnum); |
| 602 | p->peers->asnum = ntohs(asnum)(__uint16_t)(__builtin_constant_p(asnum) ? (__uint16_t)(((__uint16_t )(asnum) & 0xffU) << 8 | ((__uint16_t)(asnum) & 0xff00U) >> 8) : __swap16md(asnum)); |
| 603 | |
| 604 | memcpy(&alen, b, sizeof(alen)); |
| 605 | b += sizeof(alen); |
| 606 | len -= sizeof(alen); |
| 607 | alen = ntohs(alen)(__uint16_t)(__builtin_constant_p(alen) ? (__uint16_t)(((__uint16_t )(alen) & 0xffU) << 8 | ((__uint16_t)(alen) & 0xff00U ) >> 8) : __swap16md(alen)); |
| 608 | |
| 609 | /* attr */ |
| 610 | if (len < alen) |
| 611 | goto fail; |
| 612 | if (mrt_extract_attr(re, b, alen, r->prefix.aid, 0) == -1) |
| 613 | goto fail; |
| 614 | b += alen; |
| 615 | len -= alen; |
Value stored to 'len' is never read | |
| 616 | |
| 617 | return (0); |
| 618 | fail: |
| 619 | mrt_free_rib(r); |
| 620 | return (-1); |
| 621 | } |
| 622 | |
| 623 | int |
| 624 | mrt_parse_dump_mp(struct mrt_hdr *hdr, void *msg, struct mrt_peer **pp, |
| 625 | struct mrt_rib **rp, int verbose) |
| 626 | { |
| 627 | struct mrt_peer *p; |
| 628 | struct mrt_rib *r; |
| 629 | struct mrt_rib_entry *re; |
| 630 | u_int8_t *b = msg; |
| 631 | u_int len = ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length )); |
| 632 | u_int16_t asnum, alen, afi; |
| 633 | u_int8_t safi, nhlen, aid; |
| 634 | int ret; |
| 635 | |
| 636 | /* just ignore the microsec field for _ET header for now */ |
| 637 | if (ntohs(hdr->type)(__uint16_t)(__builtin_constant_p(hdr->type) ? (__uint16_t )(((__uint16_t)(hdr->type) & 0xffU) << 8 | ((__uint16_t )(hdr->type) & 0xff00U) >> 8) : __swap16md(hdr-> type)) == MSG_PROTOCOL_BGP4MP_ET) { |
| 638 | b = (char *)b + sizeof(u_int32_t); |
| 639 | len -= sizeof(u_int32_t); |
| 640 | } |
| 641 | |
| 642 | if (*pp == NULL((void *)0)) { |
| 643 | *pp = calloc(1, sizeof(struct mrt_peer)); |
| 644 | if (*pp == NULL((void *)0)) |
| 645 | err(1, "calloc"); |
| 646 | (*pp)->peers = calloc(1, sizeof(struct mrt_peer_entry)); |
| 647 | if ((*pp)->peers == NULL((void *)0)) |
| 648 | err(1, "calloc"); |
| 649 | (*pp)->npeers = 1; |
| 650 | } |
| 651 | p = *pp; |
| 652 | |
| 653 | *rp = r = calloc(1, sizeof(struct mrt_rib)); |
| 654 | if (r == NULL((void *)0)) |
| 655 | err(1, "calloc"); |
| 656 | re = calloc(1, sizeof(struct mrt_rib_entry)); |
| 657 | if (re == NULL((void *)0)) |
| 658 | err(1, "calloc"); |
| 659 | r->nentries = 1; |
| 660 | r->entries = re; |
| 661 | |
| 662 | if (len < 4 * sizeof(u_int16_t)) |
| 663 | goto fail; |
| 664 | /* source AS */ |
| 665 | b += sizeof(u_int16_t); |
| 666 | len -= sizeof(u_int16_t); |
| 667 | /* dest AS */ |
| 668 | memcpy(&asnum, b, sizeof(asnum)); |
| 669 | b += sizeof(asnum); |
| 670 | len -= sizeof(asnum); |
| 671 | p->peers->asnum = ntohs(asnum)(__uint16_t)(__builtin_constant_p(asnum) ? (__uint16_t)(((__uint16_t )(asnum) & 0xffU) << 8 | ((__uint16_t)(asnum) & 0xff00U) >> 8) : __swap16md(asnum)); |
| 672 | /* iface index */ |
| 673 | b += sizeof(u_int16_t); |
| 674 | len -= sizeof(u_int16_t); |
| 675 | /* afi */ |
| 676 | memcpy(&afi, b, sizeof(afi)); |
| 677 | b += sizeof(afi); |
| 678 | len -= sizeof(afi); |
| 679 | afi = ntohs(afi)(__uint16_t)(__builtin_constant_p(afi) ? (__uint16_t)(((__uint16_t )(afi) & 0xffU) << 8 | ((__uint16_t)(afi) & 0xff00U ) >> 8) : __swap16md(afi)); |
| 680 | |
| 681 | /* source + dest ip */ |
| 682 | switch (afi) { |
| 683 | case MRT_DUMP_AFI_IP: |
| 684 | if (len < 2 * sizeof(struct in_addr)) |
| 685 | goto fail; |
| 686 | /* source IP */ |
| 687 | b += sizeof(struct in_addr); |
| 688 | len -= sizeof(struct in_addr); |
| 689 | /* dest IP */ |
| 690 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET1) == -1) |
| 691 | goto fail; |
| 692 | b += sizeof(struct in_addr); |
| 693 | len -= sizeof(struct in_addr); |
| 694 | break; |
| 695 | case MRT_DUMP_AFI_IPv6: |
| 696 | if (len < 2 * sizeof(struct in6_addr)) |
| 697 | goto fail; |
| 698 | /* source IP */ |
| 699 | b += sizeof(struct in6_addr); |
| 700 | len -= sizeof(struct in6_addr); |
| 701 | /* dest IP */ |
| 702 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET62) == -1) |
| 703 | goto fail; |
| 704 | b += sizeof(struct in6_addr); |
| 705 | len -= sizeof(struct in6_addr); |
| 706 | break; |
| 707 | } |
| 708 | |
| 709 | if (len < 2 * sizeof(u_int16_t) + 2 * sizeof(u_int32_t)) |
| 710 | goto fail; |
| 711 | /* view + status */ |
| 712 | b += 2 * sizeof(u_int16_t); |
| 713 | len -= 2 * sizeof(u_int16_t); |
| 714 | /* originated */ |
| 715 | memcpy(&re->originated, b, sizeof(u_int32_t)); |
| 716 | b += sizeof(u_int32_t); |
| 717 | len -= sizeof(u_int32_t); |
| 718 | re->originated = ntohl(re->originated)(__uint32_t)(__builtin_constant_p(re->originated) ? (__uint32_t )(((__uint32_t)(re->originated) & 0xff) << 24 | ( (__uint32_t)(re->originated) & 0xff00) << 8 | (( __uint32_t)(re->originated) & 0xff0000) >> 8 | ( (__uint32_t)(re->originated) & 0xff000000) >> 24 ) : __swap32md(re->originated)); |
| 719 | |
| 720 | /* afi */ |
| 721 | memcpy(&afi, b, sizeof(afi)); |
| 722 | b += sizeof(afi); |
| 723 | len -= sizeof(afi); |
| 724 | afi = ntohs(afi)(__uint16_t)(__builtin_constant_p(afi) ? (__uint16_t)(((__uint16_t )(afi) & 0xffU) << 8 | ((__uint16_t)(afi) & 0xff00U ) >> 8) : __swap16md(afi)); |
| 725 | |
| 726 | /* safi */ |
| 727 | safi = *b++; |
| 728 | len -= 1; |
| 729 | |
| 730 | if ((aid = mrt_afi2aid(afi, safi, verbose)) == AID_UNSPEC0) |
| 731 | goto fail; |
| 732 | |
| 733 | /* nhlen */ |
| 734 | nhlen = *b++; |
| 735 | len -= 1; |
| 736 | |
| 737 | /* nexthop */ |
| 738 | if (mrt_extract_addr(b, len, &re->nexthop, aid) == -1) |
| 739 | goto fail; |
| 740 | if (len < nhlen) |
| 741 | goto fail; |
| 742 | b += nhlen; |
| 743 | len -= nhlen; |
| 744 | |
| 745 | /* prefix */ |
| 746 | ret = mrt_extract_prefix(b, len, aid, &r->prefix, &r->prefixlen, |
| 747 | verbose); |
| 748 | if (ret == 1) |
| 749 | goto fail; |
| 750 | b += ret; |
| 751 | len -= ret; |
| 752 | |
| 753 | memcpy(&alen, b, sizeof(alen)); |
| 754 | b += sizeof(alen); |
| 755 | len -= sizeof(alen); |
| 756 | alen = ntohs(alen)(__uint16_t)(__builtin_constant_p(alen) ? (__uint16_t)(((__uint16_t )(alen) & 0xffU) << 8 | ((__uint16_t)(alen) & 0xff00U ) >> 8) : __swap16md(alen)); |
| 757 | |
| 758 | /* attr */ |
| 759 | if (len < alen) |
| 760 | goto fail; |
| 761 | if (mrt_extract_attr(re, b, alen, r->prefix.aid, 0) == -1) |
| 762 | goto fail; |
| 763 | b += alen; |
| 764 | len -= alen; |
| 765 | |
| 766 | return (0); |
| 767 | fail: |
| 768 | mrt_free_rib(r); |
| 769 | return (-1); |
| 770 | } |
| 771 | |
| 772 | int |
| 773 | mrt_extract_attr(struct mrt_rib_entry *re, u_char *a, int alen, u_int8_t aid, |
| 774 | int as4) |
| 775 | { |
| 776 | struct mrt_attr *ap; |
| 777 | u_int32_t tmp; |
| 778 | u_int16_t attr_len; |
| 779 | u_int8_t type, flags, *attr; |
| 780 | |
| 781 | do { |
| 782 | if (alen < 3) |
| 783 | return (-1); |
| 784 | attr = a; |
| 785 | flags = *a++; |
| 786 | alen -= 1; |
| 787 | type = *a++; |
| 788 | alen -= 1; |
| 789 | |
| 790 | if (flags & MRT_ATTR_EXTLEN0x10) { |
| 791 | if (alen < 2) |
| 792 | return (-1); |
| 793 | memcpy(&attr_len, a, sizeof(attr_len)); |
| 794 | attr_len = ntohs(attr_len)(__uint16_t)(__builtin_constant_p(attr_len) ? (__uint16_t)((( __uint16_t)(attr_len) & 0xffU) << 8 | ((__uint16_t) (attr_len) & 0xff00U) >> 8) : __swap16md(attr_len)); |
| 795 | a += sizeof(attr_len); |
| 796 | alen -= sizeof(attr_len); |
| 797 | } else { |
| 798 | attr_len = *a++; |
| 799 | alen -= 1; |
| 800 | } |
| 801 | switch (type) { |
| 802 | case MRT_ATTR_ORIGIN1: |
| 803 | if (attr_len != 1) |
| 804 | return (-1); |
| 805 | re->origin = *a; |
| 806 | break; |
| 807 | case MRT_ATTR_ASPATH2: |
| 808 | if (as4) { |
| 809 | re->aspath_len = attr_len; |
| 810 | if ((re->aspath = malloc(attr_len)) == NULL((void *)0)) |
| 811 | err(1, "malloc"); |
| 812 | memcpy(re->aspath, a, attr_len); |
| 813 | } else { |
| 814 | re->aspath = mrt_aspath_inflate(a, attr_len, |
| 815 | &re->aspath_len); |
| 816 | if (re->aspath == NULL((void *)0)) |
| 817 | return (-1); |
| 818 | } |
| 819 | break; |
| 820 | case MRT_ATTR_NEXTHOP3: |
| 821 | if (attr_len != 4) |
| 822 | return (-1); |
| 823 | if (aid != AID_INET1) |
| 824 | break; |
| 825 | memcpy(&tmp, a, sizeof(tmp)); |
| 826 | re->nexthop.aid = AID_INET1; |
| 827 | re->nexthop.v4ba.v4.s_addr = tmp; |
| 828 | break; |
| 829 | case MRT_ATTR_MED4: |
| 830 | if (attr_len != 4) |
| 831 | return (-1); |
| 832 | memcpy(&tmp, a, sizeof(tmp)); |
| 833 | re->med = ntohl(tmp)(__uint32_t)(__builtin_constant_p(tmp) ? (__uint32_t)(((__uint32_t )(tmp) & 0xff) << 24 | ((__uint32_t)(tmp) & 0xff00 ) << 8 | ((__uint32_t)(tmp) & 0xff0000) >> 8 | ((__uint32_t)(tmp) & 0xff000000) >> 24) : __swap32md (tmp)); |
| 834 | break; |
| 835 | case MRT_ATTR_LOCALPREF5: |
| 836 | if (attr_len != 4) |
| 837 | return (-1); |
| 838 | memcpy(&tmp, a, sizeof(tmp)); |
| 839 | re->local_pref = ntohl(tmp)(__uint32_t)(__builtin_constant_p(tmp) ? (__uint32_t)(((__uint32_t )(tmp) & 0xff) << 24 | ((__uint32_t)(tmp) & 0xff00 ) << 8 | ((__uint32_t)(tmp) & 0xff0000) >> 8 | ((__uint32_t)(tmp) & 0xff000000) >> 24) : __swap32md (tmp)); |
| 840 | break; |
| 841 | case MRT_ATTR_MP_REACH_NLRI14: |
| 842 | /* |
| 843 | * XXX horrible hack: |
| 844 | * Once again IETF and the real world differ in the |
| 845 | * implementation. In short the abbreviated MP_NLRI |
| 846 | * hack in the standard is not used in real life. |
| 847 | * Detect the two cases by looking at the first byte |
| 848 | * of the payload (either the nexthop addr length (RFC) |
| 849 | * or the high byte of the AFI (old form)). If the |
| 850 | * first byte matches the expected nexthop length it |
| 851 | * is expected to be the RFC 6396 encoding. |
| 852 | */ |
| 853 | if (*a != attr_len - 1) { |
| 854 | a += 3; |
| 855 | alen -= 3; |
| 856 | attr_len -= 3; |
| 857 | } |
| 858 | switch (aid) { |
| 859 | case AID_INET62: |
| 860 | if (attr_len < sizeof(struct in6_addr) + 1) |
| 861 | return (-1); |
| 862 | re->nexthop.aid = aid; |
| 863 | memcpy(&re->nexthop.v6ba.v6, a + 1, |
| 864 | sizeof(struct in6_addr)); |
| 865 | break; |
| 866 | case AID_VPN_IPv43: |
| 867 | if (attr_len < sizeof(u_int64_t) + |
| 868 | sizeof(struct in_addr)) |
| 869 | return (-1); |
| 870 | re->nexthop.aid = aid; |
| 871 | memcpy(&tmp, a + 1 + sizeof(u_int64_t), |
| 872 | sizeof(tmp)); |
| 873 | re->nexthop.v4ba.v4.s_addr = tmp; |
| 874 | break; |
| 875 | case AID_VPN_IPv64: |
| 876 | if (attr_len < sizeof(u_int64_t) + |
| 877 | sizeof(struct in6_addr)) |
| 878 | return (-1); |
| 879 | re->nexthop.aid = aid; |
| 880 | memcpy(&re->nexthop.v6ba.v6, |
| 881 | a + 1 + sizeof(u_int64_t), |
| 882 | sizeof(struct in6_addr)); |
| 883 | break; |
| 884 | } |
| 885 | break; |
| 886 | case MRT_ATTR_AS4PATH17: |
| 887 | if (!as4) { |
| 888 | free(re->aspath); |
| 889 | re->aspath_len = attr_len; |
| 890 | if ((re->aspath = malloc(attr_len)) == NULL((void *)0)) |
| 891 | err(1, "malloc"); |
| 892 | memcpy(re->aspath, a, attr_len); |
| 893 | break; |
| 894 | } |
| 895 | /* FALLTHROUGH */ |
| 896 | default: |
| 897 | re->nattrs++; |
| 898 | if (re->nattrs >= UCHAR_MAX(127*2 +1)) |
| 899 | err(1, "too many attributes"); |
| 900 | ap = reallocarray(re->attrs, |
| 901 | re->nattrs, sizeof(struct mrt_attr)); |
| 902 | if (ap == NULL((void *)0)) |
| 903 | err(1, "realloc"); |
| 904 | re->attrs = ap; |
| 905 | ap = re->attrs + re->nattrs - 1; |
| 906 | ap->attr_len = a + attr_len - attr; |
| 907 | if ((ap->attr = malloc(ap->attr_len)) == NULL((void *)0)) |
| 908 | err(1, "malloc"); |
| 909 | memcpy(ap->attr, attr, ap->attr_len); |
| 910 | break; |
| 911 | } |
| 912 | a += attr_len; |
| 913 | alen -= attr_len; |
| 914 | } while (alen > 0); |
| 915 | |
| 916 | return (0); |
| 917 | } |
| 918 | |
| 919 | void |
| 920 | mrt_free_peers(struct mrt_peer *p) |
| 921 | { |
| 922 | free(p->peers); |
| 923 | free(p->view); |
| 924 | free(p); |
| 925 | } |
| 926 | |
| 927 | void |
| 928 | mrt_free_rib(struct mrt_rib *r) |
| 929 | { |
| 930 | u_int16_t i, j; |
| 931 | |
| 932 | for (i = 0; i < r->nentries && r->entries; i++) { |
| 933 | for (j = 0; j < r->entries[i].nattrs; j++) |
| 934 | free(r->entries[i].attrs[j].attr); |
| 935 | free(r->entries[i].attrs); |
| 936 | free(r->entries[i].aspath); |
| 937 | } |
| 938 | |
| 939 | free(r->entries); |
| 940 | free(r); |
| 941 | } |
| 942 | |
| 943 | void |
| 944 | mrt_free_bgp_state(struct mrt_bgp_state *s) |
| 945 | { |
| 946 | free(s); |
| 947 | } |
| 948 | |
| 949 | void |
| 950 | mrt_free_bgp_msg(struct mrt_bgp_msg *m) |
| 951 | { |
| 952 | free(m->msg); |
| 953 | free(m); |
| 954 | } |
| 955 | |
| 956 | u_char * |
| 957 | mrt_aspath_inflate(void *data, u_int16_t len, u_int16_t *newlen) |
| 958 | { |
| 959 | u_int8_t *seg, *nseg, *ndata; |
| 960 | u_int16_t seg_size, olen, nlen; |
| 961 | u_int8_t seg_len; |
| 962 | |
| 963 | /* first calculate the length of the aspath */ |
| 964 | seg = data; |
| 965 | nlen = 0; |
| 966 | for (olen = len; olen > 0; olen -= seg_size, seg += seg_size) { |
| 967 | seg_len = seg[1]; |
| 968 | seg_size = 2 + sizeof(u_int16_t) * seg_len; |
| 969 | nlen += 2 + sizeof(u_int32_t) * seg_len; |
| 970 | |
| 971 | if (seg_size > olen) |
| 972 | return NULL((void *)0); |
| 973 | } |
| 974 | |
| 975 | *newlen = nlen; |
| 976 | if ((ndata = malloc(nlen)) == NULL((void *)0)) |
| 977 | err(1, "malloc"); |
| 978 | |
| 979 | /* then copy the aspath */ |
| 980 | seg = data; |
| 981 | for (nseg = ndata; nseg < ndata + nlen; ) { |
| 982 | *nseg++ = *seg++; |
| 983 | *nseg++ = seg_len = *seg++; |
| 984 | for (; seg_len > 0; seg_len--) { |
| 985 | *nseg++ = 0; |
| 986 | *nseg++ = 0; |
| 987 | *nseg++ = *seg++; |
| 988 | *nseg++ = *seg++; |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | return (ndata); |
| 993 | } |
| 994 | |
| 995 | int |
| 996 | mrt_extract_addr(void *msg, u_int len, struct bgpd_addr *addr, u_int8_t aid) |
| 997 | { |
| 998 | u_int8_t *b = msg; |
| 999 | |
| 1000 | memset(addr, 0, sizeof(*addr)); |
| 1001 | switch (aid) { |
| 1002 | case AID_INET1: |
| 1003 | if (len < sizeof(struct in_addr)) |
| 1004 | return (-1); |
| 1005 | addr->aid = aid; |
| 1006 | memcpy(&addr->v4ba.v4, b, sizeof(struct in_addr)); |
| 1007 | return sizeof(struct in_addr); |
| 1008 | case AID_INET62: |
| 1009 | if (len < sizeof(struct in6_addr)) |
| 1010 | return (-1); |
| 1011 | addr->aid = aid; |
| 1012 | memcpy(&addr->v6ba.v6, b, sizeof(struct in6_addr)); |
| 1013 | return sizeof(struct in6_addr); |
| 1014 | case AID_VPN_IPv43: |
| 1015 | if (len < sizeof(u_int64_t) + sizeof(struct in_addr)) |
| 1016 | return (-1); |
| 1017 | addr->aid = aid; |
| 1018 | /* XXX labelstack and rd missing */ |
| 1019 | memcpy(&addr->v4ba.v4, b + sizeof(u_int64_t), |
| 1020 | sizeof(struct in_addr)); |
| 1021 | return (sizeof(u_int64_t) + sizeof(struct in_addr)); |
| 1022 | case AID_VPN_IPv64: |
| 1023 | if (len < sizeof(u_int64_t) + sizeof(struct in6_addr)) |
| 1024 | return (-1); |
| 1025 | addr->aid = aid; |
| 1026 | /* XXX labelstack and rd missing */ |
| 1027 | memcpy(&addr->v6ba.v6, b + sizeof(u_int64_t), |
| 1028 | sizeof(struct in6_addr)); |
| 1029 | return (sizeof(u_int64_t) + sizeof(struct in6_addr)); |
| 1030 | default: |
| 1031 | return (-1); |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | int |
| 1036 | mrt_extract_prefix(void *msg, u_int len, u_int8_t aid, |
| 1037 | struct bgpd_addr *prefix, u_int8_t *prefixlen, int verbose) |
| 1038 | { |
| 1039 | int r; |
| 1040 | |
| 1041 | switch (aid) { |
| 1042 | case AID_INET1: |
| 1043 | r = nlri_get_prefix(msg, len, prefix, prefixlen); |
| 1044 | break; |
| 1045 | case AID_INET62: |
| 1046 | r = nlri_get_prefix6(msg, len, prefix, prefixlen); |
| 1047 | break; |
| 1048 | case AID_VPN_IPv43: |
| 1049 | r = nlri_get_vpn4(msg, len, prefix, prefixlen, 0); |
| 1050 | break; |
| 1051 | case AID_VPN_IPv64: |
| 1052 | r = nlri_get_vpn6(msg, len, prefix, prefixlen, 0); |
| 1053 | break; |
| 1054 | default: |
| 1055 | if (verbose) |
| 1056 | printf("unknown prefix AID %d\n", aid); |
| 1057 | return -1; |
| 1058 | } |
| 1059 | if (r == -1 && verbose) |
| 1060 | printf("failed to parse prefix of AID %d\n", aid); |
| 1061 | return r; |
| 1062 | } |
| 1063 | |
| 1064 | struct mrt_bgp_state * |
| 1065 | mrt_parse_state(struct mrt_hdr *hdr, void *msg, int verbose) |
| 1066 | { |
| 1067 | struct timespec t; |
| 1068 | struct mrt_bgp_state *s; |
| 1069 | u_int8_t *b = msg; |
| 1070 | u_int len = ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length )); |
| 1071 | u_int32_t sas, das, usec; |
| 1072 | u_int16_t tmp16, afi; |
| 1073 | int r; |
| 1074 | u_int8_t aid; |
| 1075 | |
| 1076 | t.tv_sec = ntohl(hdr->timestamp)(__uint32_t)(__builtin_constant_p(hdr->timestamp) ? (__uint32_t )(((__uint32_t)(hdr->timestamp) & 0xff) << 24 | ( (__uint32_t)(hdr->timestamp) & 0xff00) << 8 | (( __uint32_t)(hdr->timestamp) & 0xff0000) >> 8 | ( (__uint32_t)(hdr->timestamp) & 0xff000000) >> 24 ) : __swap32md(hdr->timestamp)); |
| 1077 | t.tv_nsec = 0; |
| 1078 | |
| 1079 | /* handle the microsec field for _ET header */ |
| 1080 | if (ntohs(hdr->type)(__uint16_t)(__builtin_constant_p(hdr->type) ? (__uint16_t )(((__uint16_t)(hdr->type) & 0xffU) << 8 | ((__uint16_t )(hdr->type) & 0xff00U) >> 8) : __swap16md(hdr-> type)) == MSG_PROTOCOL_BGP4MP_ET) { |
| 1081 | memcpy(&usec, b, sizeof(usec)); |
| 1082 | b += sizeof(usec); |
| 1083 | len -= sizeof(usec); |
| 1084 | t.tv_nsec = ntohl(usec)(__uint32_t)(__builtin_constant_p(usec) ? (__uint32_t)(((__uint32_t )(usec) & 0xff) << 24 | ((__uint32_t)(usec) & 0xff00 ) << 8 | ((__uint32_t)(usec) & 0xff0000) >> 8 | ((__uint32_t)(usec) & 0xff000000) >> 24) : __swap32md (usec)) * 1000; |
| 1085 | } |
| 1086 | |
| 1087 | switch (ntohs(hdr->subtype)(__uint16_t)(__builtin_constant_p(hdr->subtype) ? (__uint16_t )(((__uint16_t)(hdr->subtype) & 0xffU) << 8 | (( __uint16_t)(hdr->subtype) & 0xff00U) >> 8) : __swap16md (hdr->subtype))) { |
| 1088 | case BGP4MP_STATE_CHANGE: |
| 1089 | if (len < 8) |
| 1090 | return (0); |
| 1091 | /* source as */ |
| 1092 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1093 | b += sizeof(tmp16); |
| 1094 | len -= sizeof(tmp16); |
| 1095 | sas = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1096 | /* dest as */ |
| 1097 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1098 | b += sizeof(tmp16); |
| 1099 | len -= sizeof(tmp16); |
| 1100 | das = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1101 | /* if_index, ignored */ |
| 1102 | b += sizeof(tmp16); |
| 1103 | len -= sizeof(tmp16); |
| 1104 | /* afi */ |
| 1105 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1106 | b += sizeof(tmp16); |
| 1107 | len -= sizeof(tmp16); |
| 1108 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1109 | break; |
| 1110 | case BGP4MP_STATE_CHANGE_AS4: |
| 1111 | if (len < 12) |
| 1112 | return (0); |
| 1113 | /* source as */ |
| 1114 | memcpy(&sas, b, sizeof(sas)); |
| 1115 | b += sizeof(sas); |
| 1116 | len -= sizeof(sas); |
| 1117 | sas = ntohl(sas)(__uint32_t)(__builtin_constant_p(sas) ? (__uint32_t)(((__uint32_t )(sas) & 0xff) << 24 | ((__uint32_t)(sas) & 0xff00 ) << 8 | ((__uint32_t)(sas) & 0xff0000) >> 8 | ((__uint32_t)(sas) & 0xff000000) >> 24) : __swap32md (sas)); |
| 1118 | /* dest as */ |
| 1119 | memcpy(&das, b, sizeof(das)); |
| 1120 | b += sizeof(das); |
| 1121 | len -= sizeof(das); |
| 1122 | das = ntohl(das)(__uint32_t)(__builtin_constant_p(das) ? (__uint32_t)(((__uint32_t )(das) & 0xff) << 24 | ((__uint32_t)(das) & 0xff00 ) << 8 | ((__uint32_t)(das) & 0xff0000) >> 8 | ((__uint32_t)(das) & 0xff000000) >> 24) : __swap32md (das)); |
| 1123 | /* if_index, ignored */ |
| 1124 | b += sizeof(tmp16); |
| 1125 | len -= sizeof(tmp16); |
| 1126 | /* afi */ |
| 1127 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1128 | b += sizeof(tmp16); |
| 1129 | len -= sizeof(tmp16); |
| 1130 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1131 | break; |
| 1132 | default: |
| 1133 | errx(1, "mrt_parse_state: bad subtype"); |
| 1134 | } |
| 1135 | |
| 1136 | /* src & dst addr */ |
| 1137 | if ((aid = mrt_afi2aid(afi, -1, verbose)) == AID_UNSPEC0) |
| 1138 | return (NULL((void *)0)); |
| 1139 | |
| 1140 | if ((s = calloc(1, sizeof(struct mrt_bgp_state))) == NULL((void *)0)) |
| 1141 | err(1, "calloc"); |
| 1142 | s->time = t; |
| 1143 | s->src_as = sas; |
| 1144 | s->dst_as = das; |
| 1145 | |
| 1146 | if ((r = mrt_extract_addr(b, len, &s->src, aid)) == -1) |
| 1147 | goto fail; |
| 1148 | b += r; |
| 1149 | len -= r; |
| 1150 | if ((r = mrt_extract_addr(b, len, &s->dst, aid)) == -1) |
| 1151 | goto fail; |
| 1152 | b += r; |
| 1153 | len -= r; |
| 1154 | |
| 1155 | /* states */ |
| 1156 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1157 | b += sizeof(tmp16); |
| 1158 | len -= sizeof(tmp16); |
| 1159 | s->old_state = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1160 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1161 | b += sizeof(tmp16); |
| 1162 | len -= sizeof(tmp16); |
| 1163 | s->new_state = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1164 | |
| 1165 | return (s); |
| 1166 | |
| 1167 | fail: |
| 1168 | free(s); |
| 1169 | return (NULL((void *)0)); |
| 1170 | } |
| 1171 | |
| 1172 | struct mrt_bgp_msg * |
| 1173 | mrt_parse_msg(struct mrt_hdr *hdr, void *msg, int verbose) |
| 1174 | { |
| 1175 | struct timespec t; |
| 1176 | struct mrt_bgp_msg *m; |
| 1177 | u_int8_t *b = msg; |
| 1178 | u_int len = ntohl(hdr->length)(__uint32_t)(__builtin_constant_p(hdr->length) ? (__uint32_t )(((__uint32_t)(hdr->length) & 0xff) << 24 | ((__uint32_t )(hdr->length) & 0xff00) << 8 | ((__uint32_t)(hdr ->length) & 0xff0000) >> 8 | ((__uint32_t)(hdr-> length) & 0xff000000) >> 24) : __swap32md(hdr->length )); |
| 1179 | u_int32_t sas, das, usec; |
| 1180 | u_int16_t tmp16, afi; |
| 1181 | int r, addpath = 0; |
| 1182 | u_int8_t aid; |
| 1183 | |
| 1184 | t.tv_sec = ntohl(hdr->timestamp)(__uint32_t)(__builtin_constant_p(hdr->timestamp) ? (__uint32_t )(((__uint32_t)(hdr->timestamp) & 0xff) << 24 | ( (__uint32_t)(hdr->timestamp) & 0xff00) << 8 | (( __uint32_t)(hdr->timestamp) & 0xff0000) >> 8 | ( (__uint32_t)(hdr->timestamp) & 0xff000000) >> 24 ) : __swap32md(hdr->timestamp)); |
| 1185 | t.tv_nsec = 0; |
| 1186 | |
| 1187 | /* handle the microsec field for _ET header */ |
| 1188 | if (ntohs(hdr->type)(__uint16_t)(__builtin_constant_p(hdr->type) ? (__uint16_t )(((__uint16_t)(hdr->type) & 0xffU) << 8 | ((__uint16_t )(hdr->type) & 0xff00U) >> 8) : __swap16md(hdr-> type)) == MSG_PROTOCOL_BGP4MP_ET) { |
| 1189 | memcpy(&usec, b, sizeof(usec)); |
| 1190 | b += sizeof(usec); |
| 1191 | len -= sizeof(usec); |
| 1192 | t.tv_nsec = ntohl(usec)(__uint32_t)(__builtin_constant_p(usec) ? (__uint32_t)(((__uint32_t )(usec) & 0xff) << 24 | ((__uint32_t)(usec) & 0xff00 ) << 8 | ((__uint32_t)(usec) & 0xff0000) >> 8 | ((__uint32_t)(usec) & 0xff000000) >> 24) : __swap32md (usec)) * 1000; |
| 1193 | } |
| 1194 | |
| 1195 | switch (ntohs(hdr->subtype)(__uint16_t)(__builtin_constant_p(hdr->subtype) ? (__uint16_t )(((__uint16_t)(hdr->subtype) & 0xffU) << 8 | (( __uint16_t)(hdr->subtype) & 0xff00U) >> 8) : __swap16md (hdr->subtype))) { |
| 1196 | case BGP4MP_MESSAGE_ADDPATH: |
| 1197 | case BGP4MP_MESSAGE_LOCAL_ADDPATH: |
| 1198 | addpath = 1; |
| 1199 | /* FALLTHROUGH */ |
| 1200 | case BGP4MP_MESSAGE: |
| 1201 | case BGP4MP_MESSAGE_LOCAL: |
| 1202 | if (len < 8) |
| 1203 | return (0); |
| 1204 | /* source as */ |
| 1205 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1206 | b += sizeof(tmp16); |
| 1207 | len -= sizeof(tmp16); |
| 1208 | sas = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1209 | /* dest as */ |
| 1210 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1211 | b += sizeof(tmp16); |
| 1212 | len -= sizeof(tmp16); |
| 1213 | das = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1214 | /* if_index, ignored */ |
| 1215 | b += sizeof(tmp16); |
| 1216 | len -= sizeof(tmp16); |
| 1217 | /* afi */ |
| 1218 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1219 | b += sizeof(tmp16); |
| 1220 | len -= sizeof(tmp16); |
| 1221 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1222 | break; |
| 1223 | case BGP4MP_MESSAGE_AS4_ADDPATH: |
| 1224 | case BGP4MP_MESSAGE_AS4_LOCAL_ADDPATH: |
| 1225 | addpath = 1; |
| 1226 | /* FALLTHROUGH */ |
| 1227 | case BGP4MP_MESSAGE_AS4: |
| 1228 | case BGP4MP_MESSAGE_AS4_LOCAL: |
| 1229 | if (len < 12) |
| 1230 | return (0); |
| 1231 | /* source as */ |
| 1232 | memcpy(&sas, b, sizeof(sas)); |
| 1233 | b += sizeof(sas); |
| 1234 | len -= sizeof(sas); |
| 1235 | sas = ntohl(sas)(__uint32_t)(__builtin_constant_p(sas) ? (__uint32_t)(((__uint32_t )(sas) & 0xff) << 24 | ((__uint32_t)(sas) & 0xff00 ) << 8 | ((__uint32_t)(sas) & 0xff0000) >> 8 | ((__uint32_t)(sas) & 0xff000000) >> 24) : __swap32md (sas)); |
| 1236 | /* dest as */ |
| 1237 | memcpy(&das, b, sizeof(das)); |
| 1238 | b += sizeof(das); |
| 1239 | len -= sizeof(das); |
| 1240 | das = ntohl(das)(__uint32_t)(__builtin_constant_p(das) ? (__uint32_t)(((__uint32_t )(das) & 0xff) << 24 | ((__uint32_t)(das) & 0xff00 ) << 8 | ((__uint32_t)(das) & 0xff0000) >> 8 | ((__uint32_t)(das) & 0xff000000) >> 24) : __swap32md (das)); |
| 1241 | /* if_index, ignored */ |
| 1242 | b += sizeof(tmp16); |
| 1243 | len -= sizeof(tmp16); |
| 1244 | /* afi */ |
| 1245 | memcpy(&tmp16, b, sizeof(tmp16)); |
| 1246 | b += sizeof(tmp16); |
| 1247 | len -= sizeof(tmp16); |
| 1248 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
| 1249 | break; |
| 1250 | default: |
| 1251 | errx(1, "mrt_parse_msg: bad subtype"); |
| 1252 | } |
| 1253 | |
| 1254 | /* src & dst addr */ |
| 1255 | if ((aid = mrt_afi2aid(afi, -1, verbose)) == AID_UNSPEC0) |
| 1256 | return (NULL((void *)0)); |
| 1257 | |
| 1258 | if ((m = calloc(1, sizeof(struct mrt_bgp_msg))) == NULL((void *)0)) |
| 1259 | err(1, "calloc"); |
| 1260 | m->time = t; |
| 1261 | m->src_as = sas; |
| 1262 | m->dst_as = das; |
| 1263 | m->add_path = addpath; |
| 1264 | |
| 1265 | if ((r = mrt_extract_addr(b, len, &m->src, aid)) == -1) |
| 1266 | goto fail; |
| 1267 | b += r; |
| 1268 | len -= r; |
| 1269 | if ((r = mrt_extract_addr(b, len, &m->dst, aid)) == -1) |
| 1270 | goto fail; |
| 1271 | b += r; |
| 1272 | len -= r; |
| 1273 | |
| 1274 | /* msg */ |
| 1275 | if (len > 0) { |
| 1276 | m->msg_len = len; |
| 1277 | if ((m->msg = malloc(len)) == NULL((void *)0)) |
| 1278 | err(1, "malloc"); |
| 1279 | memcpy(m->msg, b, len); |
| 1280 | } |
| 1281 | |
| 1282 | return (m); |
| 1283 | |
| 1284 | fail: |
| 1285 | free(m->msg); |
| 1286 | free(m); |
| 1287 | return (NULL((void *)0)); |
| 1288 | } |