| File: | src/usr.sbin/bgpd/mrt.c |
| Warning: | line 1270, column 14 Result of 'malloc' is converted to a pointer of type 'struct mrt', which is incompatible with sizeof operand type 'struct mrt_config' |
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| 1 | /* $OpenBSD: mrt.c,v 1.116 2023/07/14 10:30:53 claudio Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2003, 2004 Claudio Jeker <claudio@openbsd.org> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/queue.h> |
| 21 | |
| 22 | #include <errno(*__errno()).h> |
| 23 | #include <fcntl.h> |
| 24 | #include <limits.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <time.h> |
| 28 | #include <unistd.h> |
| 29 | |
| 30 | #include "bgpd.h" |
| 31 | #include "rde.h" |
| 32 | #include "session.h" |
| 33 | |
| 34 | #include "mrt.h" |
| 35 | #include "log.h" |
| 36 | |
| 37 | static int mrt_attr_dump(struct ibuf *, struct rde_aspath *, |
| 38 | struct rde_community *, struct bgpd_addr *, int); |
| 39 | static int mrt_dump_entry_mp(struct mrt *, struct prefix *, uint16_t, |
| 40 | struct rde_peer*); |
| 41 | static int mrt_dump_entry(struct mrt *, struct prefix *, uint16_t, |
| 42 | struct rde_peer*); |
| 43 | static int mrt_dump_entry_v2(struct mrt *, struct rib_entry *, uint32_t); |
| 44 | static int mrt_dump_peer(struct ibuf *, struct rde_peer *); |
| 45 | static int mrt_dump_hdr_se(struct ibuf **, struct peer *, uint16_t, |
| 46 | uint16_t, uint32_t, int); |
| 47 | static int mrt_dump_hdr_rde(struct ibuf **, uint16_t type, uint16_t, |
| 48 | uint32_t); |
| 49 | static int mrt_open(struct mrt *, time_t); |
| 50 | |
| 51 | #define RDEIDX0 0 |
| 52 | #define SEIDX1 1 |
| 53 | #define TYPE2IDX(x)((x == MRT_TABLE_DUMP || x == MRT_TABLE_DUMP_MP || x == MRT_TABLE_DUMP_V2 ) ? 0 : 1 ) ((x == MRT_TABLE_DUMP || \ |
| 54 | x == MRT_TABLE_DUMP_MP || \ |
| 55 | x == MRT_TABLE_DUMP_V2) ? RDEIDX0 : SEIDX1 \ |
| 56 | ) |
| 57 | |
| 58 | static uint8_t |
| 59 | mrt_update_msg_guess_aid(uint8_t *pkg, uint16_t pkglen) |
| 60 | { |
| 61 | uint16_t wlen, alen, len, afi; |
| 62 | uint8_t type, aid; |
| 63 | |
| 64 | pkg += MSGSIZE_HEADER19; |
| 65 | pkglen -= MSGSIZE_HEADER19; |
| 66 | |
| 67 | if (pkglen < 4) |
| 68 | goto bad; |
| 69 | |
| 70 | memcpy(&wlen, pkg, 2); |
| 71 | wlen = ntohs(wlen)(__uint16_t)(__builtin_constant_p(wlen) ? (__uint16_t)(((__uint16_t )(wlen) & 0xffU) << 8 | ((__uint16_t)(wlen) & 0xff00U ) >> 8) : __swap16md(wlen)); |
| 72 | pkg += 2; |
| 73 | pkglen -= 2; |
| 74 | |
| 75 | if (wlen > 0) { |
| 76 | /* UPDATE has withdraw routes, therefore IPv4 */ |
| 77 | return AID_INET1; |
| 78 | } |
| 79 | |
| 80 | memcpy(&alen, pkg, 2); |
| 81 | alen = ntohs(alen)(__uint16_t)(__builtin_constant_p(alen) ? (__uint16_t)(((__uint16_t )(alen) & 0xffU) << 8 | ((__uint16_t)(alen) & 0xff00U ) >> 8) : __swap16md(alen)); |
| 82 | pkg += 2; |
| 83 | pkglen -= 2; |
| 84 | |
| 85 | if (alen < pkglen) { |
| 86 | /* UPDATE has NLRI prefixes, therefore IPv4 */ |
| 87 | return AID_INET1; |
| 88 | } |
| 89 | |
| 90 | if (wlen == 0 && alen == 0) { |
| 91 | /* UPDATE is an IPv4 EoR marker */ |
| 92 | return AID_INET1; |
| 93 | } |
| 94 | |
| 95 | /* bad attribute length */ |
| 96 | if (alen > pkglen) |
| 97 | goto bad; |
| 98 | |
| 99 | /* try to extract AFI/SAFI from the MP attributes */ |
| 100 | while (alen > 0) { |
| 101 | if (alen < 3) |
| 102 | goto bad; |
| 103 | type = pkg[1]; |
| 104 | if (pkg[0] & ATTR_EXTLEN0x10) { |
| 105 | if (alen < 4) |
| 106 | goto bad; |
| 107 | memcpy(&len, pkg + 2, 2); |
| 108 | len = ntohs(len)(__uint16_t)(__builtin_constant_p(len) ? (__uint16_t)(((__uint16_t )(len) & 0xffU) << 8 | ((__uint16_t)(len) & 0xff00U ) >> 8) : __swap16md(len)); |
| 109 | pkg += 4; |
| 110 | alen -= 4; |
| 111 | } else { |
| 112 | len = pkg[2]; |
| 113 | pkg += 3; |
| 114 | alen -= 3; |
| 115 | } |
| 116 | if (len > alen) |
| 117 | goto bad; |
| 118 | |
| 119 | if (type == ATTR_MP_REACH_NLRI || |
| 120 | type == ATTR_MP_UNREACH_NLRI) { |
| 121 | if (alen < 3) |
| 122 | goto bad; |
| 123 | memcpy(&afi, pkg, 2); |
| 124 | afi = ntohs(afi)(__uint16_t)(__builtin_constant_p(afi) ? (__uint16_t)(((__uint16_t )(afi) & 0xffU) << 8 | ((__uint16_t)(afi) & 0xff00U ) >> 8) : __swap16md(afi)); |
| 125 | if (afi2aid(afi, pkg[2], &aid) == -1) |
| 126 | goto bad; |
| 127 | return aid; |
| 128 | } |
| 129 | |
| 130 | pkg += len; |
| 131 | alen -= len; |
| 132 | } |
| 133 | |
| 134 | bad: |
| 135 | return AID_UNSPEC0; |
| 136 | } |
| 137 | |
| 138 | static uint16_t |
| 139 | mrt_bgp_msg_subtype(struct mrt *mrt, void *pkg, uint16_t pkglen, |
| 140 | struct peer *peer, enum msg_type msgtype, int in) |
| 141 | { |
| 142 | uint16_t subtype = BGP4MP_MESSAGE; |
| 143 | uint8_t aid, mask; |
| 144 | |
| 145 | if (peer->capa.neg.as4byte) |
| 146 | subtype = BGP4MP_MESSAGE_AS4; |
| 147 | |
| 148 | if (msgtype != UPDATE) |
| 149 | return subtype; |
| 150 | |
| 151 | /* |
| 152 | * RFC8050 adjust types for add-path enabled sessions. |
| 153 | * It is necessary to extract the AID from UPDATES to decide |
| 154 | * if the add-path types are needed or not. The ADDPATH |
| 155 | * subtypes only matter for BGP UPDATES. |
| 156 | */ |
| 157 | |
| 158 | mask = in ? CAPA_AP_RECV0x01 : CAPA_AP_SEND0x02; |
| 159 | /* only guess if add-path could be active */ |
| 160 | if (peer->capa.neg.add_path[0] & mask) { |
| 161 | aid = mrt_update_msg_guess_aid(pkg, pkglen); |
| 162 | if (aid != AID_UNSPEC0 && |
| 163 | (peer->capa.neg.add_path[aid] & mask)) { |
| 164 | if (peer->capa.neg.as4byte) |
| 165 | subtype = BGP4MP_MESSAGE_AS4_ADDPATH; |
| 166 | else |
| 167 | subtype = BGP4MP_MESSAGE_ADDPATH; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | return subtype; |
| 172 | } |
| 173 | |
| 174 | void |
| 175 | mrt_dump_bgp_msg(struct mrt *mrt, void *pkg, uint16_t pkglen, |
| 176 | struct peer *peer, enum msg_type msgtype) |
| 177 | { |
| 178 | struct ibuf *buf; |
| 179 | int in = 0; |
| 180 | uint16_t subtype = BGP4MP_MESSAGE; |
| 181 | |
| 182 | /* get the direction of the message to swap address and AS fields */ |
| 183 | if (mrt->type == MRT_ALL_IN || mrt->type == MRT_UPDATE_IN) |
| 184 | in = 1; |
| 185 | |
| 186 | subtype = mrt_bgp_msg_subtype(mrt, pkg, pkglen, peer, msgtype, in); |
| 187 | |
| 188 | if (mrt_dump_hdr_se(&buf, peer, MSG_PROTOCOL_BGP4MP_ET, subtype, |
| 189 | pkglen, in) == -1) |
| 190 | goto fail; |
| 191 | |
| 192 | if (ibuf_add(buf, pkg, pkglen) == -1) |
| 193 | goto fail; |
| 194 | |
| 195 | ibuf_close(&mrt->wbuf, buf); |
| 196 | return; |
| 197 | |
| 198 | fail: |
| 199 | log_warn("%s: ibuf error", __func__); |
| 200 | ibuf_free(buf); |
| 201 | } |
| 202 | |
| 203 | void |
| 204 | mrt_dump_state(struct mrt *mrt, uint16_t old_state, uint16_t new_state, |
| 205 | struct peer *peer) |
| 206 | { |
| 207 | struct ibuf *buf; |
| 208 | uint16_t subtype = BGP4MP_STATE_CHANGE; |
| 209 | |
| 210 | if (peer->capa.neg.as4byte) |
| 211 | subtype = BGP4MP_STATE_CHANGE_AS4; |
| 212 | |
| 213 | if (mrt_dump_hdr_se(&buf, peer, MSG_PROTOCOL_BGP4MP_ET, subtype, |
| 214 | 2 * sizeof(short), 0) == -1) |
| 215 | goto fail; |
| 216 | |
| 217 | if (ibuf_add_n16(buf, old_state) == -1) |
| 218 | goto fail; |
| 219 | if (ibuf_add_n16(buf, new_state) == -1) |
| 220 | goto fail; |
| 221 | |
| 222 | ibuf_close(&mrt->wbuf, buf); |
| 223 | return; |
| 224 | |
| 225 | fail: |
| 226 | log_warn("%s: ibuf error", __func__); |
| 227 | ibuf_free(buf); |
| 228 | } |
| 229 | |
| 230 | static int |
| 231 | mrt_attr_dump(struct ibuf *buf, struct rde_aspath *a, struct rde_community *c, |
| 232 | struct bgpd_addr *nexthop, int v2) |
| 233 | { |
| 234 | struct attr *oa; |
| 235 | u_char *pdata; |
| 236 | uint32_t tmp; |
| 237 | int neednewpath = 0; |
| 238 | uint16_t plen, afi; |
| 239 | uint8_t l, safi; |
| 240 | |
| 241 | /* origin */ |
| 242 | if (attr_writebuf(buf, ATTR_WELL_KNOWN0x40, ATTR_ORIGIN, |
| 243 | &a->origin, 1) == -1) |
| 244 | return (-1); |
| 245 | |
| 246 | /* aspath */ |
| 247 | plen = aspath_length(a->aspath); |
| 248 | pdata = aspath_dump(a->aspath); |
| 249 | |
| 250 | if (!v2) |
| 251 | pdata = aspath_deflate(pdata, &plen, &neednewpath); |
| 252 | if (attr_writebuf(buf, ATTR_WELL_KNOWN0x40, ATTR_ASPATH, pdata, |
| 253 | plen) == -1) { |
| 254 | if (!v2) |
| 255 | free(pdata); |
| 256 | return (-1); |
| 257 | } |
| 258 | if (!v2) |
| 259 | free(pdata); |
| 260 | |
| 261 | if (nexthop && nexthop->aid == AID_INET1) { |
| 262 | /* nexthop, already network byte order */ |
| 263 | if (attr_writebuf(buf, ATTR_WELL_KNOWN0x40, ATTR_NEXTHOP, |
| 264 | &nexthop->v4ba.v4.s_addr, 4) == -1) |
| 265 | return (-1); |
| 266 | } |
| 267 | |
| 268 | /* MED, non transitive */ |
| 269 | if (a->med != 0) { |
| 270 | tmp = htonl(a->med)(__uint32_t)(__builtin_constant_p(a->med) ? (__uint32_t)(( (__uint32_t)(a->med) & 0xff) << 24 | ((__uint32_t )(a->med) & 0xff00) << 8 | ((__uint32_t)(a->med ) & 0xff0000) >> 8 | ((__uint32_t)(a->med) & 0xff000000) >> 24) : __swap32md(a->med)); |
| 271 | if (attr_writebuf(buf, ATTR_OPTIONAL0x80, ATTR_MED, &tmp, 4) == -1) |
| 272 | return (-1); |
| 273 | } |
| 274 | |
| 275 | /* local preference */ |
| 276 | tmp = htonl(a->lpref)(__uint32_t)(__builtin_constant_p(a->lpref) ? (__uint32_t) (((__uint32_t)(a->lpref) & 0xff) << 24 | ((__uint32_t )(a->lpref) & 0xff00) << 8 | ((__uint32_t)(a-> lpref) & 0xff0000) >> 8 | ((__uint32_t)(a->lpref ) & 0xff000000) >> 24) : __swap32md(a->lpref)); |
| 277 | if (attr_writebuf(buf, ATTR_WELL_KNOWN0x40, ATTR_LOCALPREF, &tmp, 4) == -1) |
| 278 | return (-1); |
| 279 | |
| 280 | /* communities */ |
| 281 | if (community_writebuf(c, ATTR_COMMUNITIES, 0, buf) == -1 || |
| 282 | community_writebuf(c, ATTR_EXT_COMMUNITIES, 0, buf) == -1 || |
| 283 | community_writebuf(c, ATTR_LARGE_COMMUNITIES, 0, buf) == -1) |
| 284 | return (-1); |
| 285 | |
| 286 | /* dump all other path attributes without modification */ |
| 287 | for (l = 0; l < a->others_len; l++) { |
| 288 | if ((oa = a->others[l]) == NULL((void *)0)) |
| 289 | break; |
| 290 | if (attr_writebuf(buf, oa->flags, oa->type, |
| 291 | oa->data, oa->len) == -1) |
| 292 | return (-1); |
| 293 | } |
| 294 | |
| 295 | if (nexthop && nexthop->aid != AID_INET1) { |
| 296 | struct ibuf *nhbuf; |
| 297 | |
| 298 | if ((nhbuf = ibuf_dynamic(0, UCHAR_MAX0xff)) == NULL((void *)0)) |
| 299 | return (-1); |
| 300 | if (!v2) { |
| 301 | if (aid2afi(nexthop->aid, &afi, &safi)) |
| 302 | goto fail; |
| 303 | if (ibuf_add_n16(nhbuf, afi) == -1) |
| 304 | goto fail; |
| 305 | if (ibuf_add_n8(nhbuf, safi) == -1) |
| 306 | goto fail; |
| 307 | } |
| 308 | switch (nexthop->aid) { |
| 309 | case AID_INET62: |
| 310 | if (ibuf_add_n8(nhbuf, sizeof(struct in6_addr)) == -1) |
| 311 | goto fail; |
| 312 | if (ibuf_add(nhbuf, &nexthop->v6ba.v6, |
| 313 | sizeof(struct in6_addr)) == -1) |
| 314 | goto fail; |
| 315 | break; |
| 316 | case AID_VPN_IPv43: |
| 317 | if (ibuf_add_n8(nhbuf, sizeof(uint64_t) + |
| 318 | sizeof(struct in_addr)) == -1) |
| 319 | goto fail; |
| 320 | if (ibuf_add_n64(nhbuf, 0) == -1) /* set RD to 0 */ |
| 321 | goto fail; |
| 322 | if (ibuf_add(nhbuf, &nexthop->v4ba.v4, |
| 323 | sizeof(nexthop->v4ba.v4)) == -1) |
| 324 | goto fail; |
| 325 | break; |
| 326 | case AID_VPN_IPv64: |
| 327 | if (ibuf_add_n8(nhbuf, sizeof(uint64_t) + |
| 328 | sizeof(struct in6_addr)) == -1) |
| 329 | goto fail; |
| 330 | if (ibuf_add_n64(nhbuf, 0) == -1) /* set RD to 0 */ |
| 331 | goto fail; |
| 332 | if (ibuf_add(nhbuf, &nexthop->v6ba.v6, |
| 333 | sizeof(nexthop->v6ba.v6)) == -1) |
| 334 | goto fail; |
| 335 | break; |
| 336 | } |
| 337 | if (!v2) |
| 338 | if (ibuf_add_n8(nhbuf, 0) == -1) |
| 339 | goto fail; |
| 340 | if (attr_writebuf(buf, ATTR_OPTIONAL0x80, ATTR_MP_REACH_NLRI, |
| 341 | ibuf_data(nhbuf), ibuf_size(nhbuf)) == -1) { |
| 342 | fail: |
| 343 | ibuf_free(nhbuf); |
| 344 | return (-1); |
| 345 | } |
| 346 | ibuf_free(nhbuf); |
| 347 | } |
| 348 | |
| 349 | if (neednewpath) { |
| 350 | pdata = aspath_prepend(a->aspath, rde_local_as(), 0, &plen); |
| 351 | if (plen != 0) |
| 352 | if (attr_writebuf(buf, ATTR_OPTIONAL0x80|ATTR_TRANSITIVE0x40, |
| 353 | ATTR_AS4_PATH, pdata, plen) == -1) { |
| 354 | free(pdata); |
| 355 | return (-1); |
| 356 | } |
| 357 | free(pdata); |
| 358 | } |
| 359 | |
| 360 | return (0); |
| 361 | } |
| 362 | |
| 363 | static int |
| 364 | mrt_dump_entry_mp(struct mrt *mrt, struct prefix *p, uint16_t snum, |
| 365 | struct rde_peer *peer) |
| 366 | { |
| 367 | struct ibuf *buf, *hbuf = NULL((void *)0), *h2buf = NULL((void *)0); |
| 368 | struct nexthop *n; |
| 369 | struct bgpd_addr nexthop, *nh; |
| 370 | uint16_t len; |
| 371 | uint8_t aid; |
| 372 | |
| 373 | if ((buf = ibuf_dynamic(0, MAX_PKTSIZE4096)) == NULL((void *)0)) { |
| 374 | log_warn("mrt_dump_entry_mp: ibuf_dynamic"); |
| 375 | return (-1); |
| 376 | } |
| 377 | |
| 378 | if (mrt_attr_dump(buf, prefix_aspath(p), prefix_communities(p), |
| 379 | NULL((void *)0), 0) == -1) |
| 380 | goto fail; |
| 381 | len = ibuf_size(buf); |
| 382 | |
| 383 | if ((h2buf = ibuf_dynamic(MRT_BGP4MP_IPv4_HEADER_SIZE16 + |
| 384 | MRT_BGP4MP_IPv4_ENTRY_SIZE18, MRT_BGP4MP_IPv6_HEADER_SIZE40 + |
| 385 | MRT_BGP4MP_IPv6_ENTRY_SIZE30 + MRT_BGP4MP_MAX_PREFIXLEN256)) == NULL((void *)0)) |
| 386 | goto fail; |
| 387 | |
| 388 | if (ibuf_add_n16(h2buf, peer->conf.local_short_as) == -1) |
| 389 | goto fail; |
| 390 | if (ibuf_add_n16(h2buf, peer->short_as) == -1) |
| 391 | goto fail; |
| 392 | if (ibuf_add_n16(h2buf, /* ifindex */ 0) == -1) |
| 393 | goto fail; |
| 394 | |
| 395 | /* XXX is this for peer self? */ |
| 396 | aid = peer->remote_addr.aid == AID_UNSPEC0 ? p->pt->aid : |
| 397 | peer->remote_addr.aid; |
| 398 | switch (aid) { |
| 399 | case AID_INET1: |
| 400 | case AID_VPN_IPv43: |
| 401 | if (ibuf_add_n16(h2buf, AFI_IPv41) == -1) |
| 402 | goto fail; |
| 403 | if (ibuf_add(h2buf, &peer->local_v4_addr.v4ba.v4, |
| 404 | sizeof(peer->local_v4_addr.v4ba.v4)) == -1 || |
| 405 | ibuf_add(h2buf, &peer->remote_addr.v4ba.v4, |
| 406 | sizeof(peer->remote_addr.v4ba.v4)) == -1) |
| 407 | goto fail; |
| 408 | break; |
| 409 | case AID_INET62: |
| 410 | case AID_VPN_IPv64: |
| 411 | if (ibuf_add_n16(h2buf, AFI_IPv62) == -1) |
| 412 | goto fail; |
| 413 | if (ibuf_add(h2buf, &peer->local_v6_addr.v6ba.v6, |
| 414 | sizeof(peer->local_v6_addr.v6ba.v6)) == -1 || |
| 415 | ibuf_add(h2buf, &peer->remote_addr.v6ba.v6, |
| 416 | sizeof(peer->remote_addr.v6ba.v6)) == -1) |
| 417 | goto fail; |
| 418 | break; |
| 419 | default: |
| 420 | log_warnx("king bula found new AF %d in %s", aid, __func__); |
| 421 | goto fail; |
| 422 | } |
| 423 | |
| 424 | if (ibuf_add_n16(h2buf, 0) == -1) /* view */ |
| 425 | goto fail; |
| 426 | if (ibuf_add_n16(h2buf, 1) == -1) /* status */ |
| 427 | goto fail; |
| 428 | /* originated timestamp */ |
| 429 | if (ibuf_add_n32(h2buf, time(NULL((void *)0)) - (getmonotime() - |
| 430 | p->lastchange)) == -1) |
| 431 | goto fail; |
| 432 | |
| 433 | n = prefix_nexthop(p); |
| 434 | if (n == NULL((void *)0)) { |
| 435 | memset(&nexthop, 0, sizeof(struct bgpd_addr)); |
| 436 | nexthop.aid = p->pt->aid; |
| 437 | nh = &nexthop; |
| 438 | } else |
| 439 | nh = &n->exit_nexthop; |
| 440 | |
| 441 | switch (p->pt->aid) { |
| 442 | case AID_INET1: |
| 443 | if (ibuf_add_n16(h2buf, AFI_IPv41) == -1) /* afi */ |
| 444 | goto fail; |
| 445 | if (ibuf_add_n8(h2buf, SAFI_UNICAST1) == -1) /* safi */ |
| 446 | goto fail; |
| 447 | if (ibuf_add_n8(h2buf, 4) == -1) /* nhlen */ |
| 448 | goto fail; |
| 449 | if (ibuf_add(h2buf, &nh->v4ba.v4, sizeof(nh->v4ba.v4)) == -1) |
| 450 | goto fail; |
| 451 | break; |
| 452 | case AID_INET62: |
| 453 | if (ibuf_add_n16(h2buf, AFI_IPv62) == -1) /* afi */ |
| 454 | goto fail; |
| 455 | if (ibuf_add_n8(h2buf, SAFI_UNICAST1) == -1) /* safi */ |
| 456 | goto fail; |
| 457 | if (ibuf_add_n8(h2buf, 16) == -1) /* nhlen */ |
| 458 | goto fail; |
| 459 | if (ibuf_add(h2buf, &nh->v6ba.v6, sizeof(nh->v6ba.v6)) == -1) |
| 460 | goto fail; |
| 461 | break; |
| 462 | case AID_VPN_IPv43: |
| 463 | if (ibuf_add_n16(h2buf, AFI_IPv41) == -1) /* afi */ |
| 464 | goto fail; |
| 465 | if (ibuf_add_n8(h2buf, SAFI_MPLSVPN128) == -1) /* safi */ |
| 466 | goto fail; |
| 467 | if (ibuf_add_n8(h2buf, sizeof(uint64_t) + |
| 468 | sizeof(struct in_addr)) == -1) |
| 469 | goto fail; |
| 470 | if (ibuf_add_n64(h2buf, 0) == -1) /* set RD to 0 */ |
| 471 | goto fail; |
| 472 | if (ibuf_add(h2buf, &nh->v4ba.v4, sizeof(nh->v4ba.v4)) == -1) |
| 473 | goto fail; |
| 474 | break; |
| 475 | case AID_VPN_IPv64: |
| 476 | if (ibuf_add_n16(h2buf, AFI_IPv62) == -1) /* afi */ |
| 477 | goto fail; |
| 478 | if (ibuf_add_n8(h2buf, SAFI_MPLSVPN128) == -1) /* safi */ |
| 479 | goto fail; |
| 480 | if (ibuf_add_n8(h2buf, sizeof(uint64_t) + |
| 481 | sizeof(struct in6_addr)) == -1) |
| 482 | goto fail; |
| 483 | if (ibuf_add_n64(h2buf, 0) == -1) /* set RD to 0 */ |
| 484 | goto fail; |
| 485 | if (ibuf_add(h2buf, &nh->v6ba.v6, sizeof(nh->v6ba.v6)) == -1) |
| 486 | goto fail; |
| 487 | break; |
| 488 | case AID_FLOWSPECv45: |
| 489 | case AID_FLOWSPECv66: |
| 490 | if (p->pt->aid == AID_FLOWSPECv45) { |
| 491 | if (ibuf_add_n16(h2buf, AFI_IPv41) == -1) /* afi */ |
| 492 | goto fail; |
| 493 | } else { |
| 494 | if (ibuf_add_n16(h2buf, AFI_IPv62) == -1) /* afi */ |
| 495 | goto fail; |
| 496 | } |
| 497 | if (ibuf_add_n8(h2buf, SAFI_FLOWSPEC133) == -1) /* safi */ |
| 498 | goto fail; |
| 499 | if (ibuf_add_n8(h2buf, 0) == -1) /* nhlen */ |
| 500 | goto fail; |
| 501 | break; |
| 502 | default: |
| 503 | log_warnx("king bula found new AF in %s", __func__); |
| 504 | goto fail; |
| 505 | } |
| 506 | |
| 507 | if (pt_writebuf(h2buf, p->pt, 0, 0, 0) == -1) |
| 508 | goto fail; |
| 509 | |
| 510 | if (ibuf_add_n16(h2buf, len) == -1) |
| 511 | goto fail; |
| 512 | len += ibuf_size(h2buf); |
| 513 | |
| 514 | if (mrt_dump_hdr_rde(&hbuf, MSG_PROTOCOL_BGP4MP, BGP4MP_ENTRY, |
| 515 | len) == -1) |
| 516 | goto fail; |
| 517 | |
| 518 | ibuf_close(&mrt->wbuf, hbuf); |
| 519 | ibuf_close(&mrt->wbuf, h2buf); |
| 520 | ibuf_close(&mrt->wbuf, buf); |
| 521 | |
| 522 | return (len + MRT_HEADER_SIZE12); |
| 523 | |
| 524 | fail: |
| 525 | log_warn("%s: ibuf error", __func__); |
| 526 | ibuf_free(hbuf); |
| 527 | ibuf_free(h2buf); |
| 528 | ibuf_free(buf); |
| 529 | return (-1); |
| 530 | } |
| 531 | |
| 532 | static int |
| 533 | mrt_dump_entry(struct mrt *mrt, struct prefix *p, uint16_t snum, |
| 534 | struct rde_peer *peer) |
| 535 | { |
| 536 | struct ibuf *buf, *hbuf = NULL((void *)0); |
| 537 | struct nexthop *nexthop; |
| 538 | struct bgpd_addr addr, *nh; |
| 539 | size_t len; |
| 540 | uint16_t subtype; |
| 541 | uint8_t dummy; |
| 542 | |
| 543 | if (p->pt->aid != peer->remote_addr.aid && |
| 544 | p->pt->aid != AID_INET1 && p->pt->aid != AID_INET62) |
| 545 | /* only able to dump pure IPv4/IPv6 */ |
| 546 | return (0); |
| 547 | |
| 548 | if ((buf = ibuf_dynamic(0, MAX_PKTSIZE4096)) == NULL((void *)0)) { |
| 549 | log_warn("mrt_dump_entry: ibuf_dynamic"); |
| 550 | return (-1); |
| 551 | } |
| 552 | |
| 553 | nexthop = prefix_nexthop(p); |
| 554 | if (nexthop == NULL((void *)0)) { |
| 555 | memset(&addr, 0, sizeof(struct bgpd_addr)); |
| 556 | addr.aid = p->pt->aid; |
| 557 | nh = &addr; |
| 558 | } else |
| 559 | nh = &nexthop->exit_nexthop; |
| 560 | if (mrt_attr_dump(buf, prefix_aspath(p), prefix_communities(p), |
| 561 | nh, 0) == -1) |
| 562 | goto fail; |
| 563 | |
| 564 | len = ibuf_size(buf); |
| 565 | aid2afi(p->pt->aid, &subtype, &dummy); |
| 566 | if (mrt_dump_hdr_rde(&hbuf, MSG_TABLE_DUMP, subtype, len) == -1) |
| 567 | goto fail; |
| 568 | |
| 569 | if (ibuf_add_n16(hbuf, 0) == -1) |
| 570 | goto fail; |
| 571 | if (ibuf_add_n16(hbuf, snum) == -1) |
| 572 | goto fail; |
| 573 | |
| 574 | pt_getaddr(p->pt, &addr); |
| 575 | switch (p->pt->aid) { |
| 576 | case AID_INET1: |
| 577 | if (ibuf_add(hbuf, &addr.v4ba.v4, sizeof(addr.v4ba.v4)) == -1) |
| 578 | goto fail; |
| 579 | break; |
| 580 | case AID_INET62: |
| 581 | if (ibuf_add(hbuf, &addr.v6ba.v6, sizeof(addr.v6ba.v6)) == -1) |
| 582 | goto fail; |
| 583 | break; |
| 584 | } |
| 585 | if (ibuf_add_n8(hbuf, p->pt->prefixlen) == -1) |
| 586 | goto fail; |
| 587 | |
| 588 | if (ibuf_add_n8(hbuf, 1) == -1) /* state */ |
| 589 | goto fail; |
| 590 | /* originated timestamp */ |
| 591 | if (ibuf_add_n32(hbuf, time(NULL((void *)0)) - (getmonotime() - |
| 592 | p->lastchange)) == -1) |
| 593 | goto fail; |
| 594 | switch (p->pt->aid) { |
| 595 | case AID_INET1: |
| 596 | if (ibuf_add(hbuf, &peer->remote_addr.v4ba.v4, |
| 597 | sizeof(peer->remote_addr.v4ba.v4)) == -1) |
| 598 | goto fail; |
| 599 | break; |
| 600 | case AID_INET62: |
| 601 | if (ibuf_add(hbuf, &peer->remote_addr.v6ba.v6, |
| 602 | sizeof(peer->remote_addr.v6ba.v6)) == -1) |
| 603 | goto fail; |
| 604 | break; |
| 605 | } |
| 606 | if (ibuf_add_n16(hbuf, peer->short_as) == -1) |
| 607 | goto fail; |
| 608 | if (ibuf_add_n16(hbuf, len) == -1) |
| 609 | goto fail; |
| 610 | |
| 611 | ibuf_close(&mrt->wbuf, hbuf); |
| 612 | ibuf_close(&mrt->wbuf, buf); |
| 613 | |
| 614 | return (len + MRT_HEADER_SIZE12); |
| 615 | |
| 616 | fail: |
| 617 | log_warn("%s: ibuf error", __func__); |
| 618 | ibuf_free(hbuf); |
| 619 | ibuf_free(buf); |
| 620 | return (-1); |
| 621 | } |
| 622 | |
| 623 | static int |
| 624 | mrt_dump_entry_v2_rib(struct rib_entry *re, struct ibuf **nb, struct ibuf **apb, |
| 625 | uint16_t *np, uint16_t *app) |
| 626 | { |
| 627 | struct bgpd_addr addr; |
| 628 | struct ibuf *buf = NULL((void *)0), **bp; |
| 629 | struct ibuf *tbuf = NULL((void *)0); |
| 630 | struct prefix *p; |
| 631 | int addpath; |
| 632 | |
| 633 | *np = 0; |
| 634 | *app = 0; |
| 635 | |
| 636 | TAILQ_FOREACH(p, &re->prefix_h, entry.list.rib)for((p) = ((&re->prefix_h)->tqh_first); (p) != ((void *)0); (p) = ((p)->entry.list.rib.tqe_next)) { |
| 637 | struct nexthop *nexthop; |
| 638 | struct bgpd_addr *nh; |
| 639 | |
| 640 | addpath = peer_has_add_path(prefix_peer(p), re->prefix->aid, |
| 641 | CAPA_AP_RECV0x01); |
| 642 | |
| 643 | if (addpath) { |
| 644 | bp = apb; |
| 645 | *app += 1; |
| 646 | } else { |
| 647 | bp = nb; |
| 648 | *np += 1; |
| 649 | } |
| 650 | if ((buf = *bp) == NULL((void *)0)) { |
| 651 | if ((buf = ibuf_dynamic(0, UINT_MAX0xffffffffU)) == NULL((void *)0)) |
| 652 | goto fail; |
| 653 | *bp = buf; |
| 654 | } |
| 655 | |
| 656 | nexthop = prefix_nexthop(p); |
| 657 | if (nexthop == NULL((void *)0)) { |
| 658 | memset(&addr, 0, sizeof(struct bgpd_addr)); |
| 659 | addr.aid = re->prefix->aid; |
| 660 | nh = &addr; |
| 661 | } else |
| 662 | nh = &nexthop->exit_nexthop; |
| 663 | |
| 664 | if (ibuf_add_n16(buf, prefix_peer(p)->mrt_idx) == -1) |
| 665 | goto fail; |
| 666 | /* originated timestamp */ |
| 667 | if (ibuf_add_n32(buf, time(NULL((void *)0)) - (getmonotime() - |
| 668 | p->lastchange)) == -1) |
| 669 | goto fail; |
| 670 | |
| 671 | /* RFC8050: path-id if add-path is used */ |
| 672 | if (addpath) |
| 673 | if (ibuf_add_n32(buf, p->path_id) == -1) |
| 674 | goto fail; |
| 675 | |
| 676 | if ((tbuf = ibuf_dynamic(0, MAX_PKTSIZE4096)) == NULL((void *)0)) |
| 677 | goto fail; |
| 678 | if (mrt_attr_dump(tbuf, prefix_aspath(p), prefix_communities(p), |
| 679 | nh, 1) == -1) |
| 680 | goto fail; |
| 681 | if (ibuf_add_n16(buf, ibuf_size(tbuf)) == -1) |
| 682 | goto fail; |
| 683 | if (ibuf_add_buf(buf, tbuf) == -1) |
| 684 | goto fail; |
| 685 | ibuf_free(tbuf); |
| 686 | tbuf = NULL((void *)0); |
| 687 | } |
| 688 | |
| 689 | return 0; |
| 690 | |
| 691 | fail: |
| 692 | ibuf_free(tbuf); |
| 693 | return -1; |
| 694 | } |
| 695 | |
| 696 | static int |
| 697 | mrt_dump_entry_v2(struct mrt *mrt, struct rib_entry *re, uint32_t snum) |
| 698 | { |
| 699 | struct ibuf *hbuf = NULL((void *)0), *nbuf = NULL((void *)0), *apbuf = NULL((void *)0), *pbuf; |
| 700 | size_t hlen, len; |
| 701 | uint16_t subtype, apsubtype, nump, apnump, afi; |
| 702 | uint8_t safi; |
| 703 | |
| 704 | if ((pbuf = ibuf_dynamic(0, UINT_MAX0xffffffffU)) == NULL((void *)0)) { |
| 705 | log_warn("%s: ibuf_dynamic", __func__); |
| 706 | return -1; |
| 707 | } |
| 708 | |
| 709 | switch (re->prefix->aid) { |
| 710 | case AID_INET1: |
| 711 | subtype = MRT_DUMP_V2_RIB_IPV4_UNICAST; |
| 712 | apsubtype = MRT_DUMP_V2_RIB_IPV4_UNICAST_ADDPATH; |
| 713 | break; |
| 714 | case AID_INET62: |
| 715 | subtype = MRT_DUMP_V2_RIB_IPV6_UNICAST; |
| 716 | apsubtype = MRT_DUMP_V2_RIB_IPV6_UNICAST_ADDPATH; |
| 717 | break; |
| 718 | default: |
| 719 | /* |
| 720 | * XXX The RFC defined the format for this type differently |
| 721 | * and it is prohibitly expensive to implement that format. |
| 722 | * Instead do what gobgp does and encode it like the other |
| 723 | * types. |
| 724 | */ |
| 725 | subtype = MRT_DUMP_V2_RIB_GENERIC; |
| 726 | apsubtype = MRT_DUMP_V2_RIB_GENERIC_ADDPATH; |
| 727 | aid2afi(re->prefix->aid, &afi, &safi); |
| 728 | |
| 729 | /* first add 3-bytes AFI/SAFI */ |
| 730 | if (ibuf_add_n16(pbuf, afi) == -1) |
| 731 | goto fail; |
| 732 | if (ibuf_add_n8(pbuf, safi) == -1) |
| 733 | goto fail; |
| 734 | break; |
| 735 | } |
| 736 | |
| 737 | if (pt_writebuf(pbuf, re->prefix, 0, 0, 0) == -1) |
| 738 | goto fail; |
| 739 | |
| 740 | hlen = sizeof(snum) + sizeof(nump) + ibuf_size(pbuf); |
| 741 | |
| 742 | if (mrt_dump_entry_v2_rib(re, &nbuf, &apbuf, &nump, &apnump)) |
| 743 | goto fail; |
| 744 | |
| 745 | if (nump > 0) { |
| 746 | len = ibuf_size(nbuf) + hlen; |
| 747 | if (mrt_dump_hdr_rde(&hbuf, MSG_TABLE_DUMP_V2, subtype, |
| 748 | len) == -1) |
| 749 | goto fail; |
| 750 | |
| 751 | if (ibuf_add_n32(hbuf, snum) == -1) |
| 752 | goto fail; |
| 753 | if (ibuf_add_buf(hbuf, pbuf) == -1) |
| 754 | goto fail; |
| 755 | if (ibuf_add_n16(hbuf, nump) == -1) |
| 756 | goto fail; |
| 757 | |
| 758 | ibuf_close(&mrt->wbuf, hbuf); |
| 759 | ibuf_close(&mrt->wbuf, nbuf); |
| 760 | hbuf = NULL((void *)0); |
| 761 | nbuf = NULL((void *)0); |
| 762 | } |
| 763 | |
| 764 | if (apnump > 0) { |
| 765 | len = ibuf_size(apbuf) + hlen; |
| 766 | if (mrt_dump_hdr_rde(&hbuf, MSG_TABLE_DUMP_V2, apsubtype, |
| 767 | len) == -1) |
| 768 | goto fail; |
| 769 | |
| 770 | if (ibuf_add_n32(hbuf, snum) == -1) |
| 771 | goto fail; |
| 772 | if (ibuf_add_buf(hbuf, pbuf) == -1) |
| 773 | goto fail; |
| 774 | if (ibuf_add_n16(hbuf, apnump) == -1) |
| 775 | goto fail; |
| 776 | |
| 777 | ibuf_close(&mrt->wbuf, hbuf); |
| 778 | ibuf_close(&mrt->wbuf, apbuf); |
| 779 | hbuf = NULL((void *)0); |
| 780 | apbuf = NULL((void *)0); |
| 781 | } |
| 782 | |
| 783 | ibuf_free(pbuf); |
| 784 | return (0); |
| 785 | fail: |
| 786 | log_warn("%s: ibuf error", __func__); |
| 787 | ibuf_free(apbuf); |
| 788 | ibuf_free(nbuf); |
| 789 | ibuf_free(hbuf); |
| 790 | ibuf_free(pbuf); |
| 791 | return (-1); |
| 792 | } |
| 793 | |
| 794 | struct cb_arg { |
| 795 | struct ibuf *buf; |
| 796 | int nump; |
| 797 | }; |
| 798 | |
| 799 | static void |
| 800 | mrt_dump_v2_hdr_peer(struct rde_peer *peer, void *arg) |
| 801 | { |
| 802 | struct cb_arg *a = arg; |
| 803 | |
| 804 | if (a->nump == -1) |
| 805 | return; |
| 806 | peer->mrt_idx = a->nump; |
| 807 | if (mrt_dump_peer(a->buf, peer) == -1) { |
| 808 | a->nump = -1; |
| 809 | return; |
| 810 | } |
| 811 | a->nump++; |
| 812 | } |
| 813 | |
| 814 | int |
| 815 | mrt_dump_v2_hdr(struct mrt *mrt, struct bgpd_config *conf) |
| 816 | { |
| 817 | struct ibuf *buf, *hbuf = NULL((void *)0); |
| 818 | size_t len, off; |
| 819 | uint16_t nlen, nump; |
| 820 | struct cb_arg arg; |
| 821 | |
| 822 | if ((buf = ibuf_dynamic(0, UINT_MAX0xffffffffU)) == NULL((void *)0)) { |
| 823 | log_warn("%s: ibuf_dynamic", __func__); |
| 824 | return (-1); |
| 825 | } |
| 826 | |
| 827 | if (ibuf_add(buf, &conf->bgpid, sizeof(conf->bgpid)) == -1) |
| 828 | goto fail; |
| 829 | nlen = strlen(mrt->rib); |
| 830 | if (nlen > 0) |
| 831 | nlen += 1; |
| 832 | if (ibuf_add_n16(buf, nlen) == -1) |
| 833 | goto fail; |
| 834 | if (ibuf_add(buf, mrt->rib, nlen) == -1) |
| 835 | goto fail; |
| 836 | |
| 837 | off = ibuf_size(buf); |
| 838 | if (ibuf_add_zero(buf, sizeof(nump)) == -1) |
| 839 | goto fail; |
| 840 | arg.nump = 0; |
| 841 | arg.buf = buf; |
| 842 | peer_foreach(mrt_dump_v2_hdr_peer, &arg); |
| 843 | if (arg.nump == -1) |
| 844 | goto fail; |
| 845 | |
| 846 | if (ibuf_set_n16(buf, off, arg.nump) == -1) |
| 847 | goto fail; |
| 848 | |
| 849 | len = ibuf_size(buf); |
| 850 | if (mrt_dump_hdr_rde(&hbuf, MSG_TABLE_DUMP_V2, |
| 851 | MRT_DUMP_V2_PEER_INDEX_TABLE, len) == -1) |
| 852 | goto fail; |
| 853 | |
| 854 | ibuf_close(&mrt->wbuf, hbuf); |
| 855 | ibuf_close(&mrt->wbuf, buf); |
| 856 | |
| 857 | return (0); |
| 858 | fail: |
| 859 | log_warn("%s: ibuf error", __func__); |
| 860 | ibuf_free(hbuf); |
| 861 | ibuf_free(buf); |
| 862 | return (-1); |
| 863 | } |
| 864 | |
| 865 | static int |
| 866 | mrt_dump_peer(struct ibuf *buf, struct rde_peer *peer) |
| 867 | { |
| 868 | uint8_t type = 0; |
| 869 | |
| 870 | if (peer->capa.as4byte) |
| 871 | type |= MRT_DUMP_V2_PEER_BIT_A0x2; |
| 872 | if (peer->remote_addr.aid == AID_INET62) |
| 873 | type |= MRT_DUMP_V2_PEER_BIT_I0x1; |
| 874 | |
| 875 | if (ibuf_add_n8(buf, type) == -1) |
| 876 | goto fail; |
| 877 | if (ibuf_add_n32(buf, peer->remote_bgpid) == -1) |
| 878 | goto fail; |
| 879 | |
| 880 | switch (peer->remote_addr.aid) { |
| 881 | case AID_INET1: |
| 882 | if (ibuf_add(buf, &peer->remote_addr.v4ba.v4, |
| 883 | sizeof(peer->remote_addr.v4ba.v4)) == -1) |
| 884 | goto fail; |
| 885 | break; |
| 886 | case AID_INET62: |
| 887 | if (ibuf_add(buf, &peer->remote_addr.v6ba.v6, |
| 888 | sizeof(peer->remote_addr.v6ba.v6)) == -1) |
| 889 | goto fail; |
| 890 | break; |
| 891 | case AID_UNSPEC0: /* XXX special handling for peerself? */ |
| 892 | if (ibuf_add_n32(buf, 0) == -1) |
| 893 | goto fail; |
| 894 | break; |
| 895 | default: |
| 896 | log_warnx("king bula found new AF in %s", __func__); |
| 897 | goto fail; |
| 898 | } |
| 899 | |
| 900 | if (peer->capa.as4byte) { |
| 901 | if (ibuf_add_n32(buf, peer->conf.remote_as) == -1) |
| 902 | goto fail; |
| 903 | } else { |
| 904 | if (ibuf_add_n16(buf, peer->short_as) == -1) |
| 905 | goto fail; |
| 906 | } |
| 907 | return (0); |
| 908 | fail: |
| 909 | log_warn("%s: ibuf error", __func__); |
| 910 | return (-1); |
| 911 | } |
| 912 | |
| 913 | void |
| 914 | mrt_dump_upcall(struct rib_entry *re, void *ptr) |
| 915 | { |
| 916 | struct mrt *mrtbuf = ptr; |
| 917 | struct prefix *p; |
| 918 | |
| 919 | if (mrtbuf->type == MRT_TABLE_DUMP_V2) { |
| 920 | mrt_dump_entry_v2(mrtbuf, re, mrtbuf->seqnum++); |
| 921 | return; |
| 922 | } |
| 923 | |
| 924 | /* |
| 925 | * dump all prefixes even the inactive ones. That is the way zebra |
| 926 | * dumps the table so we do the same. If only the active route should |
| 927 | * be dumped p should be set to p = pt->active. |
| 928 | */ |
| 929 | TAILQ_FOREACH(p, &re->prefix_h, entry.list.rib)for((p) = ((&re->prefix_h)->tqh_first); (p) != ((void *)0); (p) = ((p)->entry.list.rib.tqe_next)) { |
| 930 | if (mrtbuf->type == MRT_TABLE_DUMP) |
| 931 | mrt_dump_entry(mrtbuf, p, mrtbuf->seqnum++, |
| 932 | prefix_peer(p)); |
| 933 | else |
| 934 | mrt_dump_entry_mp(mrtbuf, p, mrtbuf->seqnum++, |
| 935 | prefix_peer(p)); |
| 936 | } |
| 937 | } |
| 938 | |
| 939 | void |
| 940 | mrt_done(struct mrt *mrtbuf) |
| 941 | { |
| 942 | mrtbuf->state = MRT_STATE_REMOVE; |
| 943 | } |
| 944 | |
| 945 | static int |
| 946 | mrt_dump_hdr_se(struct ibuf ** bp, struct peer *peer, uint16_t type, |
| 947 | uint16_t subtype, uint32_t len, int swap) |
| 948 | { |
| 949 | struct timespec time; |
| 950 | |
| 951 | if ((*bp = ibuf_dynamic(MRT_ET_HEADER_SIZE16, MRT_ET_HEADER_SIZE16 + |
| 952 | MRT_BGP4MP_AS4_IPv6_HEADER_SIZE44 + len)) == NULL((void *)0)) |
| 953 | return (-1); |
| 954 | |
| 955 | clock_gettime(CLOCK_REALTIME0, &time); |
| 956 | |
| 957 | if (ibuf_add_n32(*bp, time.tv_sec) == -1) |
| 958 | goto fail; |
| 959 | if (ibuf_add_n16(*bp, type) == -1) |
| 960 | goto fail; |
| 961 | if (ibuf_add_n16(*bp, subtype) == -1) |
| 962 | goto fail; |
| 963 | |
| 964 | switch (peer->local.aid) { |
| 965 | case AID_INET1: |
| 966 | if (subtype == BGP4MP_STATE_CHANGE_AS4 || |
| 967 | subtype == BGP4MP_MESSAGE_AS4 || |
| 968 | subtype == BGP4MP_MESSAGE_AS4_ADDPATH) |
| 969 | len += MRT_BGP4MP_ET_AS4_IPv4_HEADER_SIZE24; |
| 970 | else |
| 971 | len += MRT_BGP4MP_ET_IPv4_HEADER_SIZE20; |
| 972 | break; |
| 973 | case AID_INET62: |
| 974 | if (subtype == BGP4MP_STATE_CHANGE_AS4 || |
| 975 | subtype == BGP4MP_MESSAGE_AS4 || |
| 976 | subtype == BGP4MP_MESSAGE_AS4_ADDPATH) |
| 977 | len += MRT_BGP4MP_ET_AS4_IPv6_HEADER_SIZE48; |
| 978 | else |
| 979 | len += MRT_BGP4MP_ET_IPv6_HEADER_SIZE44; |
| 980 | break; |
| 981 | case 0: |
| 982 | goto fail; |
| 983 | default: |
| 984 | log_warnx("king bula found new AF in %s", __func__); |
| 985 | goto fail; |
| 986 | } |
| 987 | |
| 988 | if (ibuf_add_n32(*bp, len) == -1) |
| 989 | goto fail; |
| 990 | /* millisecond field use by the _ET format */ |
| 991 | if (ibuf_add_n32(*bp, time.tv_nsec / 1000) == -1) |
| 992 | goto fail; |
| 993 | |
| 994 | if (subtype == BGP4MP_STATE_CHANGE_AS4 || |
| 995 | subtype == BGP4MP_MESSAGE_AS4 || |
| 996 | subtype == BGP4MP_MESSAGE_AS4_ADDPATH) { |
| 997 | if (!swap) |
| 998 | if (ibuf_add_n32(*bp, peer->conf.local_as) == -1) |
| 999 | goto fail; |
| 1000 | if (ibuf_add_n32(*bp, peer->conf.remote_as) == -1) |
| 1001 | goto fail; |
| 1002 | if (swap) |
| 1003 | if (ibuf_add_n32(*bp, peer->conf.local_as) == -1) |
| 1004 | goto fail; |
| 1005 | } else { |
| 1006 | if (!swap) |
| 1007 | if (ibuf_add_n16(*bp, peer->conf.local_short_as) == -1) |
| 1008 | goto fail; |
| 1009 | if (ibuf_add_n16(*bp, peer->short_as) == -1) |
| 1010 | goto fail; |
| 1011 | if (swap) |
| 1012 | if (ibuf_add_n16(*bp, peer->conf.local_short_as) == -1) |
| 1013 | goto fail; |
| 1014 | } |
| 1015 | |
| 1016 | if (ibuf_add_n16(*bp, /* ifindex */ 0) == -1) |
| 1017 | goto fail; |
| 1018 | |
| 1019 | switch (peer->local.aid) { |
| 1020 | case AID_INET1: |
| 1021 | if (ibuf_add_n16(*bp, AFI_IPv41) == -1) |
| 1022 | goto fail; |
| 1023 | if (!swap) |
| 1024 | if (ibuf_add(*bp, &peer->local.v4ba.v4, |
| 1025 | sizeof(peer->local.v4ba.v4)) == -1) |
| 1026 | goto fail; |
| 1027 | if (ibuf_add(*bp, &peer->remote.v4ba.v4, |
| 1028 | sizeof(peer->remote.v4ba.v4)) == -1) |
| 1029 | goto fail; |
| 1030 | if (swap) |
| 1031 | if (ibuf_add(*bp, &peer->local.v4ba.v4, |
| 1032 | sizeof(peer->local.v4ba.v4)) == -1) |
| 1033 | goto fail; |
| 1034 | break; |
| 1035 | case AID_INET62: |
| 1036 | if (ibuf_add_n16(*bp, AFI_IPv62) == -1) |
| 1037 | goto fail; |
| 1038 | if (!swap) |
| 1039 | if (ibuf_add(*bp, &peer->local.v6ba.v6, |
| 1040 | sizeof(peer->local.v6ba.v6)) == -1) |
| 1041 | goto fail; |
| 1042 | if (ibuf_add(*bp, &peer->remote.v6ba.v6, |
| 1043 | sizeof(peer->remote.v6ba.v6)) == -1) |
| 1044 | goto fail; |
| 1045 | if (swap) |
| 1046 | if (ibuf_add(*bp, &peer->local.v6ba.v6, |
| 1047 | sizeof(peer->local.v6ba.v6)) == -1) |
| 1048 | goto fail; |
| 1049 | break; |
| 1050 | } |
| 1051 | |
| 1052 | return (0); |
| 1053 | |
| 1054 | fail: |
| 1055 | ibuf_free(*bp); |
| 1056 | *bp = NULL((void *)0); |
| 1057 | return (-1); |
| 1058 | } |
| 1059 | |
| 1060 | int |
| 1061 | mrt_dump_hdr_rde(struct ibuf **bp, uint16_t type, uint16_t subtype, |
| 1062 | uint32_t len) |
| 1063 | { |
| 1064 | struct timespec time; |
| 1065 | |
| 1066 | if ((*bp = ibuf_dynamic(MRT_HEADER_SIZE12, MRT_HEADER_SIZE12 + |
| 1067 | MRT_BGP4MP_AS4_IPv6_HEADER_SIZE44 + MRT_BGP4MP_IPv6_ENTRY_SIZE30)) == |
| 1068 | NULL((void *)0)) |
| 1069 | return (-1); |
| 1070 | |
| 1071 | clock_gettime(CLOCK_REALTIME0, &time); |
| 1072 | |
| 1073 | if (ibuf_add_n32(*bp, time.tv_sec) == -1) |
| 1074 | goto fail; |
| 1075 | if (ibuf_add_n16(*bp, type) == -1) |
| 1076 | goto fail; |
| 1077 | if (ibuf_add_n16(*bp, subtype) == -1) |
| 1078 | goto fail; |
| 1079 | |
| 1080 | switch (type) { |
| 1081 | case MSG_TABLE_DUMP: |
| 1082 | switch (subtype) { |
| 1083 | case AFI_IPv41: |
| 1084 | len += MRT_DUMP_HEADER_SIZE22; |
| 1085 | break; |
| 1086 | case AFI_IPv62: |
| 1087 | len += MRT_DUMP_HEADER_SIZE_V646; |
| 1088 | break; |
| 1089 | } |
| 1090 | if (ibuf_add_n32(*bp, len) == -1) |
| 1091 | goto fail; |
| 1092 | break; |
| 1093 | case MSG_PROTOCOL_BGP4MP: |
| 1094 | case MSG_TABLE_DUMP_V2: |
| 1095 | if (ibuf_add_n32(*bp, len) == -1) |
| 1096 | goto fail; |
| 1097 | break; |
| 1098 | default: |
| 1099 | log_warnx("mrt_dump_hdr_rde: unsupported type"); |
| 1100 | goto fail; |
| 1101 | } |
| 1102 | return (0); |
| 1103 | |
| 1104 | fail: |
| 1105 | ibuf_free(*bp); |
| 1106 | *bp = NULL((void *)0); |
| 1107 | return (-1); |
| 1108 | } |
| 1109 | |
| 1110 | void |
| 1111 | mrt_write(struct mrt *mrt) |
| 1112 | { |
| 1113 | int r; |
| 1114 | |
| 1115 | if ((r = ibuf_write(&mrt->wbuf)) == -1 && errno(*__errno()) != EAGAIN35) { |
| 1116 | log_warn("mrt dump aborted, mrt_write"); |
| 1117 | mrt_clean(mrt); |
| 1118 | mrt_done(mrt); |
| 1119 | } |
| 1120 | } |
| 1121 | |
| 1122 | void |
| 1123 | mrt_clean(struct mrt *mrt) |
| 1124 | { |
| 1125 | close(mrt->wbuf.fd); |
| 1126 | msgbuf_clear(&mrt->wbuf); |
| 1127 | } |
| 1128 | |
| 1129 | static struct imsgbuf *mrt_imsgbuf[2]; |
| 1130 | |
| 1131 | void |
| 1132 | mrt_init(struct imsgbuf *rde, struct imsgbuf *se) |
| 1133 | { |
| 1134 | mrt_imsgbuf[RDEIDX0] = rde; |
| 1135 | mrt_imsgbuf[SEIDX1] = se; |
| 1136 | } |
| 1137 | |
| 1138 | int |
| 1139 | mrt_open(struct mrt *mrt, time_t now) |
| 1140 | { |
| 1141 | enum imsg_type type; |
| 1142 | int fd; |
| 1143 | |
| 1144 | if (strftime(MRT2MC(mrt)((struct mrt_config *)(mrt))->file, sizeof(MRT2MC(mrt)((struct mrt_config *)(mrt))->file), |
| 1145 | MRT2MC(mrt)((struct mrt_config *)(mrt))->name, localtime(&now)) == 0) { |
| 1146 | log_warnx("mrt_open: strftime conversion failed"); |
| 1147 | return (-1); |
| 1148 | } |
| 1149 | |
| 1150 | fd = open(MRT2MC(mrt)((struct mrt_config *)(mrt))->file, |
| 1151 | O_WRONLY0x0001|O_NONBLOCK0x0004|O_CREAT0x0200|O_TRUNC0x0400|O_CLOEXEC0x10000, 0644); |
| 1152 | if (fd == -1) { |
| 1153 | log_warn("mrt_open %s", MRT2MC(mrt)((struct mrt_config *)(mrt))->file); |
| 1154 | return (1); |
| 1155 | } |
| 1156 | |
| 1157 | if (mrt->state == MRT_STATE_OPEN) |
| 1158 | type = IMSG_MRT_OPEN; |
| 1159 | else |
| 1160 | type = IMSG_MRT_REOPEN; |
| 1161 | |
| 1162 | if (imsg_compose(mrt_imsgbuf[TYPE2IDX(mrt->type)((mrt->type == MRT_TABLE_DUMP || mrt->type == MRT_TABLE_DUMP_MP || mrt->type == MRT_TABLE_DUMP_V2) ? 0 : 1 )], type, 0, 0, fd, |
| 1163 | mrt, sizeof(struct mrt)) == -1) |
| 1164 | log_warn("mrt_open"); |
| 1165 | |
| 1166 | return (1); |
| 1167 | } |
| 1168 | |
| 1169 | time_t |
| 1170 | mrt_timeout(struct mrt_head *mrt) |
| 1171 | { |
| 1172 | struct mrt *m; |
| 1173 | time_t now; |
| 1174 | time_t timeout = -1; |
| 1175 | |
| 1176 | now = time(NULL((void *)0)); |
| 1177 | LIST_FOREACH(m, mrt, entry)for((m) = ((mrt)->lh_first); (m)!= ((void *)0); (m) = ((m) ->entry.le_next)) { |
| 1178 | if (m->state == MRT_STATE_RUNNING && |
| 1179 | MRT2MC(m)((struct mrt_config *)(m))->ReopenTimerInterval != 0) { |
| 1180 | if (MRT2MC(m)((struct mrt_config *)(m))->ReopenTimer <= now) { |
| 1181 | mrt_open(m, now); |
| 1182 | MRT2MC(m)((struct mrt_config *)(m))->ReopenTimer = |
| 1183 | now + MRT2MC(m)((struct mrt_config *)(m))->ReopenTimerInterval; |
| 1184 | } |
| 1185 | if (timeout == -1 || |
| 1186 | MRT2MC(m)((struct mrt_config *)(m))->ReopenTimer - now < timeout) |
| 1187 | timeout = MRT2MC(m)((struct mrt_config *)(m))->ReopenTimer - now; |
| 1188 | } |
| 1189 | } |
| 1190 | return (timeout); |
| 1191 | } |
| 1192 | |
| 1193 | void |
| 1194 | mrt_reconfigure(struct mrt_head *mrt) |
| 1195 | { |
| 1196 | struct mrt *m, *xm; |
| 1197 | time_t now; |
| 1198 | |
| 1199 | now = time(NULL((void *)0)); |
| 1200 | for (m = LIST_FIRST(mrt)((mrt)->lh_first); m != NULL((void *)0); m = xm) { |
| 1201 | xm = LIST_NEXT(m, entry)((m)->entry.le_next); |
| 1202 | if (m->state == MRT_STATE_OPEN || |
| 1203 | m->state == MRT_STATE_REOPEN) { |
| 1204 | if (mrt_open(m, now) == -1) |
| 1205 | continue; |
| 1206 | if (MRT2MC(m)((struct mrt_config *)(m))->ReopenTimerInterval != 0) |
| 1207 | MRT2MC(m)((struct mrt_config *)(m))->ReopenTimer = |
| 1208 | now + MRT2MC(m)((struct mrt_config *)(m))->ReopenTimerInterval; |
| 1209 | m->state = MRT_STATE_RUNNING; |
| 1210 | } |
| 1211 | if (m->state == MRT_STATE_REMOVE) { |
| 1212 | if (imsg_compose(mrt_imsgbuf[TYPE2IDX(m->type)((m->type == MRT_TABLE_DUMP || m->type == MRT_TABLE_DUMP_MP || m->type == MRT_TABLE_DUMP_V2) ? 0 : 1 )], |
| 1213 | IMSG_MRT_CLOSE, 0, 0, -1, m, sizeof(struct mrt)) == |
| 1214 | -1) |
| 1215 | log_warn("mrt_reconfigure"); |
| 1216 | LIST_REMOVE(m, entry)do { if ((m)->entry.le_next != ((void *)0)) (m)->entry. le_next->entry.le_prev = (m)->entry.le_prev; *(m)->entry .le_prev = (m)->entry.le_next; ; ; } while (0); |
| 1217 | free(m); |
| 1218 | continue; |
| 1219 | } |
| 1220 | } |
| 1221 | } |
| 1222 | |
| 1223 | void |
| 1224 | mrt_handler(struct mrt_head *mrt) |
| 1225 | { |
| 1226 | struct mrt *m; |
| 1227 | time_t now; |
| 1228 | |
| 1229 | now = time(NULL((void *)0)); |
| 1230 | LIST_FOREACH(m, mrt, entry)for((m) = ((mrt)->lh_first); (m)!= ((void *)0); (m) = ((m) ->entry.le_next)) { |
| 1231 | if (m->state == MRT_STATE_RUNNING && |
| 1232 | (MRT2MC(m)((struct mrt_config *)(m))->ReopenTimerInterval != 0 || |
| 1233 | m->type == MRT_TABLE_DUMP || |
| 1234 | m->type == MRT_TABLE_DUMP_MP || |
| 1235 | m->type == MRT_TABLE_DUMP_V2)) { |
| 1236 | if (mrt_open(m, now) == -1) |
| 1237 | continue; |
| 1238 | MRT2MC(m)((struct mrt_config *)(m))->ReopenTimer = |
| 1239 | now + MRT2MC(m)((struct mrt_config *)(m))->ReopenTimerInterval; |
| 1240 | } |
| 1241 | } |
| 1242 | } |
| 1243 | |
| 1244 | struct mrt * |
| 1245 | mrt_get(struct mrt_head *c, struct mrt *m) |
| 1246 | { |
| 1247 | struct mrt *t; |
| 1248 | |
| 1249 | LIST_FOREACH(t, c, entry)for((t) = ((c)->lh_first); (t)!= ((void *)0); (t) = ((t)-> entry.le_next)) { |
| 1250 | if (t->type != m->type) |
| 1251 | continue; |
| 1252 | if (strcmp(t->rib, m->rib)) |
| 1253 | continue; |
| 1254 | if (t->peer_id == m->peer_id && |
| 1255 | t->group_id == m->group_id) |
| 1256 | return (t); |
| 1257 | } |
| 1258 | return (NULL((void *)0)); |
| 1259 | } |
| 1260 | |
| 1261 | void |
| 1262 | mrt_mergeconfig(struct mrt_head *xconf, struct mrt_head *nconf) |
| 1263 | { |
| 1264 | struct mrt *m, *xm; |
| 1265 | |
| 1266 | /* both lists here are actually struct mrt_conifg nodes */ |
| 1267 | LIST_FOREACH(m, nconf, entry)for((m) = ((nconf)->lh_first); (m)!= ((void *)0); (m) = (( m)->entry.le_next)) { |
| 1268 | if ((xm = mrt_get(xconf, m)) == NULL((void *)0)) { |
| 1269 | /* NEW */ |
| 1270 | if ((xm = malloc(sizeof(struct mrt_config))) == NULL((void *)0)) |
Result of 'malloc' is converted to a pointer of type 'struct mrt', which is incompatible with sizeof operand type 'struct mrt_config' | |
| 1271 | fatal("mrt_mergeconfig"); |
| 1272 | memcpy(xm, m, sizeof(struct mrt_config)); |
| 1273 | xm->state = MRT_STATE_OPEN; |
| 1274 | LIST_INSERT_HEAD(xconf, xm, entry)do { if (((xm)->entry.le_next = (xconf)->lh_first) != ( (void *)0)) (xconf)->lh_first->entry.le_prev = &(xm )->entry.le_next; (xconf)->lh_first = (xm); (xm)->entry .le_prev = &(xconf)->lh_first; } while (0); |
| 1275 | } else { |
| 1276 | /* MERGE */ |
| 1277 | if (strlcpy(MRT2MC(xm)((struct mrt_config *)(xm))->name, MRT2MC(m)((struct mrt_config *)(m))->name, |
| 1278 | sizeof(MRT2MC(xm)((struct mrt_config *)(xm))->name)) >= |
| 1279 | sizeof(MRT2MC(xm)((struct mrt_config *)(xm))->name)) |
| 1280 | fatalx("mrt_mergeconfig: strlcpy"); |
| 1281 | MRT2MC(xm)((struct mrt_config *)(xm))->ReopenTimerInterval = |
| 1282 | MRT2MC(m)((struct mrt_config *)(m))->ReopenTimerInterval; |
| 1283 | xm->state = MRT_STATE_REOPEN; |
| 1284 | } |
| 1285 | } |
| 1286 | |
| 1287 | LIST_FOREACH(xm, xconf, entry)for((xm) = ((xconf)->lh_first); (xm)!= ((void *)0); (xm) = ((xm)->entry.le_next)) |
| 1288 | if (mrt_get(nconf, xm) == NULL((void *)0)) |
| 1289 | /* REMOVE */ |
| 1290 | xm->state = MRT_STATE_REMOVE; |
| 1291 | |
| 1292 | /* free config */ |
| 1293 | while ((m = LIST_FIRST(nconf)((nconf)->lh_first)) != NULL((void *)0)) { |
| 1294 | LIST_REMOVE(m, entry)do { if ((m)->entry.le_next != ((void *)0)) (m)->entry. le_next->entry.le_prev = (m)->entry.le_prev; *(m)->entry .le_prev = (m)->entry.le_next; ; ; } while (0); |
| 1295 | free(m); |
| 1296 | } |
| 1297 | } |