File: | src/usr.bin/bgplg/bgpctl/../../../usr.sbin/bgpctl/mrtparser.c |
Warning: | line 1161, column 2 Value stored to 'len' is never read |
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1 | /* $OpenBSD: mrtparser.c,v 1.20 2023/11/20 14:18:21 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, uint8_t, int); |
42 | |
43 | void mrt_free_peers(struct mrt_peer *); |
44 | void mrt_free_rib(struct mrt_rib *); |
45 | void mrt_free_bgp_state(struct mrt_bgp_state *); |
46 | void mrt_free_bgp_msg(struct mrt_bgp_msg *); |
47 | |
48 | u_char *mrt_aspath_inflate(void *, uint16_t, uint16_t *); |
49 | int mrt_extract_addr(void *, u_int, struct bgpd_addr *, uint8_t); |
50 | int mrt_extract_prefix(void *, u_int, uint8_t, struct bgpd_addr *, |
51 | uint8_t *, int); |
52 | |
53 | struct mrt_bgp_state *mrt_parse_state(struct mrt_hdr *, void *, int); |
54 | struct mrt_bgp_msg *mrt_parse_msg(struct mrt_hdr *, void *, int); |
55 | |
56 | void * |
57 | mrt_read_msg(int fd, struct mrt_hdr *hdr) |
58 | { |
59 | void *buf; |
60 | |
61 | memset(hdr, 0, sizeof(*hdr)); |
62 | if (mrt_read_buf(fd, hdr, sizeof(*hdr)) != sizeof(*hdr)) |
63 | return (NULL((void *)0)); |
64 | |
65 | 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)) |
66 | err(1, "malloc(%d)", hdr->length); |
67 | |
68 | 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 ))) { |
69 | free(buf); |
70 | return (NULL((void *)0)); |
71 | } |
72 | return (buf); |
73 | } |
74 | |
75 | size_t |
76 | mrt_read_buf(int fd, void *buf, size_t len) |
77 | { |
78 | char *b = buf; |
79 | ssize_t n; |
80 | |
81 | while (len > 0) { |
82 | if ((n = read(fd, b, len)) == -1) { |
83 | if (errno(*__errno()) == EINTR4) |
84 | continue; |
85 | err(1, "read"); |
86 | } |
87 | if (n == 0) |
88 | break; |
89 | b += n; |
90 | len -= n; |
91 | } |
92 | |
93 | return (b - (char *)buf); |
94 | } |
95 | |
96 | void |
97 | mrt_parse(int fd, struct mrt_parser *p, int verbose) |
98 | { |
99 | struct mrt_hdr h; |
100 | struct mrt_peer *pctx = NULL((void *)0); |
101 | struct mrt_rib *r; |
102 | struct mrt_bgp_state *s; |
103 | struct mrt_bgp_msg *m; |
104 | void *msg; |
105 | |
106 | while ((msg = mrt_read_msg(fd, &h))) { |
107 | 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))) { |
108 | case MSG_NULL: |
109 | case MSG_START: |
110 | case MSG_DIE: |
111 | case MSG_I_AM_DEAD: |
112 | case MSG_PEER_DOWN: |
113 | case MSG_PROTOCOL_BGP: |
114 | case MSG_PROTOCOL_IDRP: |
115 | case MSG_PROTOCOL_BGP4PLUS: |
116 | case MSG_PROTOCOL_BGP4PLUS1: |
117 | if (verbose) |
118 | printf("deprecated MRT type %d\n", |
119 | 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))); |
120 | break; |
121 | case MSG_PROTOCOL_RIP: |
122 | case MSG_PROTOCOL_RIPNG: |
123 | case MSG_PROTOCOL_OSPF: |
124 | case MSG_PROTOCOL_ISIS_ET: |
125 | case MSG_PROTOCOL_ISIS: |
126 | case MSG_PROTOCOL_OSPFV3_ET: |
127 | case MSG_PROTOCOL_OSPFV3: |
128 | if (verbose) |
129 | printf("unsupported MRT type %d\n", |
130 | 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))); |
131 | break; |
132 | case MSG_TABLE_DUMP: |
133 | 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 ))) { |
134 | case MRT_DUMP_AFI_IP: |
135 | case MRT_DUMP_AFI_IPv6: |
136 | if (p->dump == NULL((void *)0)) |
137 | break; |
138 | if (mrt_parse_dump(&h, msg, &pctx, &r) == 0) { |
139 | if (p->dump) |
140 | p->dump(r, pctx, p->arg); |
141 | mrt_free_rib(r); |
142 | } |
143 | break; |
144 | default: |
145 | if (verbose) |
146 | printf("unknown AFI %d in table dump\n", |
147 | 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 ))); |
148 | break; |
149 | } |
150 | break; |
151 | case MSG_TABLE_DUMP_V2: |
152 | 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 ))) { |
153 | case MRT_DUMP_V2_PEER_INDEX_TABLE: |
154 | if (p->dump == NULL((void *)0)) |
155 | break; |
156 | if (pctx) |
157 | mrt_free_peers(pctx); |
158 | pctx = mrt_parse_v2_peer(&h, msg); |
159 | break; |
160 | case MRT_DUMP_V2_RIB_IPV4_UNICAST: |
161 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST: |
162 | case MRT_DUMP_V2_RIB_IPV6_UNICAST: |
163 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST: |
164 | case MRT_DUMP_V2_RIB_GENERIC: |
165 | case MRT_DUMP_V2_RIB_IPV4_UNICAST_ADDPATH: |
166 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST_ADDPATH: |
167 | case MRT_DUMP_V2_RIB_IPV6_UNICAST_ADDPATH: |
168 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST_ADDPATH: |
169 | case MRT_DUMP_V2_RIB_GENERIC_ADDPATH: |
170 | if (p->dump == NULL((void *)0)) |
171 | break; |
172 | r = mrt_parse_v2_rib(&h, msg, verbose); |
173 | if (r) { |
174 | if (p->dump) |
175 | p->dump(r, pctx, p->arg); |
176 | mrt_free_rib(r); |
177 | } |
178 | break; |
179 | default: |
180 | if (verbose) |
181 | printf("unhandled DUMP_V2 subtype %d\n", |
182 | 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 ))); |
183 | break; |
184 | } |
185 | break; |
186 | case MSG_PROTOCOL_BGP4MP_ET: |
187 | case MSG_PROTOCOL_BGP4MP: |
188 | 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 ))) { |
189 | case BGP4MP_STATE_CHANGE: |
190 | case BGP4MP_STATE_CHANGE_AS4: |
191 | if ((s = mrt_parse_state(&h, msg, verbose))) { |
192 | if (p->state) |
193 | p->state(s, p->arg); |
194 | free(s); |
195 | } |
196 | break; |
197 | case BGP4MP_MESSAGE: |
198 | case BGP4MP_MESSAGE_AS4: |
199 | case BGP4MP_MESSAGE_LOCAL: |
200 | case BGP4MP_MESSAGE_AS4_LOCAL: |
201 | case BGP4MP_MESSAGE_ADDPATH: |
202 | case BGP4MP_MESSAGE_AS4_ADDPATH: |
203 | case BGP4MP_MESSAGE_LOCAL_ADDPATH: |
204 | case BGP4MP_MESSAGE_AS4_LOCAL_ADDPATH: |
205 | if ((m = mrt_parse_msg(&h, msg, verbose))) { |
206 | if (p->message) |
207 | p->message(m, p->arg); |
208 | free(m->msg); |
209 | free(m); |
210 | } |
211 | break; |
212 | case BGP4MP_ENTRY: |
213 | if (p->dump == NULL((void *)0)) |
214 | break; |
215 | if (mrt_parse_dump_mp(&h, msg, &pctx, &r, |
216 | verbose) == 0) { |
217 | if (p->dump) |
218 | p->dump(r, pctx, p->arg); |
219 | mrt_free_rib(r); |
220 | } |
221 | break; |
222 | default: |
223 | if (verbose) |
224 | printf("unhandled BGP4MP subtype %d\n", |
225 | 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 ))); |
226 | break; |
227 | } |
228 | break; |
229 | default: |
230 | if (verbose) |
231 | 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))); |
232 | break; |
233 | } |
234 | free(msg); |
235 | } |
236 | if (pctx) |
237 | mrt_free_peers(pctx); |
238 | } |
239 | |
240 | static int |
241 | mrt_afi2aid(int afi, int safi, int verbose) |
242 | { |
243 | switch (afi) { |
244 | case MRT_DUMP_AFI_IP: |
245 | if (safi == -1 || safi == 1 || safi == 2) |
246 | return AID_INET1; |
247 | else if (safi == 128) |
248 | return AID_VPN_IPv43; |
249 | break; |
250 | case MRT_DUMP_AFI_IPv6: |
251 | if (safi == -1 || safi == 1 || safi == 2) |
252 | return AID_INET62; |
253 | else if (safi == 128) |
254 | return AID_VPN_IPv64; |
255 | break; |
256 | default: |
257 | break; |
258 | } |
259 | if (verbose) |
260 | printf("unhandled AFI/SAFI %d/%d\n", afi, safi); |
261 | return AID_UNSPEC0; |
262 | } |
263 | |
264 | struct mrt_peer * |
265 | mrt_parse_v2_peer(struct mrt_hdr *hdr, void *msg) |
266 | { |
267 | struct mrt_peer_entry *peers = NULL((void *)0); |
268 | struct mrt_peer *p; |
269 | uint8_t *b = msg; |
270 | uint32_t bid, as4; |
271 | uint16_t cnt, i, as2; |
272 | 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 )); |
273 | |
274 | if (len < 8) /* min msg size */ |
275 | return NULL((void *)0); |
276 | |
277 | p = calloc(1, sizeof(struct mrt_peer)); |
278 | if (p == NULL((void *)0)) |
279 | err(1, "calloc"); |
280 | |
281 | /* collector bgp id */ |
282 | memcpy(&bid, b, sizeof(bid)); |
283 | b += sizeof(bid); |
284 | len -= sizeof(bid); |
285 | 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)); |
286 | |
287 | /* view name length */ |
288 | memcpy(&cnt, b, sizeof(cnt)); |
289 | b += sizeof(cnt); |
290 | len -= sizeof(cnt); |
291 | cnt = ntohs(cnt)(__uint16_t)(__builtin_constant_p(cnt) ? (__uint16_t)(((__uint16_t )(cnt) & 0xffU) << 8 | ((__uint16_t)(cnt) & 0xff00U ) >> 8) : __swap16md(cnt)); |
292 | |
293 | /* view name */ |
294 | if (cnt > len) |
295 | goto fail; |
296 | if (cnt != 0) { |
297 | if ((p->view = malloc(cnt + 1)) == NULL((void *)0)) |
298 | err(1, "malloc"); |
299 | memcpy(p->view, b, cnt); |
300 | p->view[cnt] = 0; |
301 | } else |
302 | if ((p->view = strdup("")) == NULL((void *)0)) |
303 | err(1, "strdup"); |
304 | b += cnt; |
305 | len -= cnt; |
306 | |
307 | /* peer_count */ |
308 | if (len < sizeof(cnt)) |
309 | goto fail; |
310 | memcpy(&cnt, b, sizeof(cnt)); |
311 | b += sizeof(cnt); |
312 | len -= sizeof(cnt); |
313 | cnt = ntohs(cnt)(__uint16_t)(__builtin_constant_p(cnt) ? (__uint16_t)(((__uint16_t )(cnt) & 0xffU) << 8 | ((__uint16_t)(cnt) & 0xff00U ) >> 8) : __swap16md(cnt)); |
314 | |
315 | /* peer entries */ |
316 | if ((peers = calloc(cnt, sizeof(struct mrt_peer_entry))) == NULL((void *)0)) |
317 | err(1, "calloc"); |
318 | for (i = 0; i < cnt; i++) { |
319 | uint8_t type; |
320 | |
321 | if (len < sizeof(uint8_t) + sizeof(uint32_t)) |
322 | goto fail; |
323 | type = *b++; |
324 | len -= 1; |
325 | memcpy(&bid, b, sizeof(bid)); |
326 | b += sizeof(bid); |
327 | len -= sizeof(bid); |
328 | 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)); |
329 | |
330 | if (type & MRT_DUMP_V2_PEER_BIT_I0x1) { |
331 | if (mrt_extract_addr(b, len, &peers[i].addr, |
332 | AID_INET62) == -1) |
333 | goto fail; |
334 | b += sizeof(struct in6_addr); |
335 | len -= sizeof(struct in6_addr); |
336 | } else { |
337 | if (mrt_extract_addr(b, len, &peers[i].addr, |
338 | AID_INET1) == -1) |
339 | goto fail; |
340 | b += sizeof(struct in_addr); |
341 | len -= sizeof(struct in_addr); |
342 | } |
343 | |
344 | if (type & MRT_DUMP_V2_PEER_BIT_A0x2) { |
345 | memcpy(&as4, b, sizeof(as4)); |
346 | b += sizeof(as4); |
347 | len -= sizeof(as4); |
348 | 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)); |
349 | } else { |
350 | memcpy(&as2, b, sizeof(as2)); |
351 | b += sizeof(as2); |
352 | len -= sizeof(as2); |
353 | as4 = ntohs(as2)(__uint16_t)(__builtin_constant_p(as2) ? (__uint16_t)(((__uint16_t )(as2) & 0xffU) << 8 | ((__uint16_t)(as2) & 0xff00U ) >> 8) : __swap16md(as2)); |
354 | } |
355 | peers[i].asnum = as4; |
356 | } |
357 | p->peers = peers; |
358 | p->npeers = cnt; |
359 | return (p); |
360 | fail: |
361 | mrt_free_peers(p); |
362 | free(peers); |
363 | return (NULL((void *)0)); |
364 | } |
365 | |
366 | struct mrt_rib * |
367 | mrt_parse_v2_rib(struct mrt_hdr *hdr, void *msg, int verbose) |
368 | { |
369 | struct mrt_rib_entry *entries = NULL((void *)0); |
370 | struct mrt_rib *r; |
371 | uint8_t *b = msg; |
372 | 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 )); |
373 | uint32_t snum, path_id = 0; |
374 | uint16_t cnt, i, afi; |
375 | uint8_t safi, aid; |
376 | int ret; |
377 | |
378 | if (len < sizeof(snum) + 1) |
379 | return NULL((void *)0); |
380 | |
381 | r = calloc(1, sizeof(struct mrt_rib)); |
382 | if (r == NULL((void *)0)) |
383 | err(1, "calloc"); |
384 | |
385 | /* seq_num */ |
386 | memcpy(&snum, b, sizeof(snum)); |
387 | b += sizeof(snum); |
388 | len -= sizeof(snum); |
389 | 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)); |
390 | |
391 | 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))) { |
392 | case MRT_DUMP_V2_RIB_IPV4_UNICAST_ADDPATH: |
393 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST_ADDPATH: |
394 | r->add_path = 1; |
395 | /* FALLTHROUGH */ |
396 | case MRT_DUMP_V2_RIB_IPV4_UNICAST: |
397 | case MRT_DUMP_V2_RIB_IPV4_MULTICAST: |
398 | /* prefix */ |
399 | ret = mrt_extract_prefix(b, len, AID_INET1, &r->prefix, |
400 | &r->prefixlen, verbose); |
401 | if (ret == 1) |
402 | goto fail; |
403 | break; |
404 | case MRT_DUMP_V2_RIB_IPV6_UNICAST_ADDPATH: |
405 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST_ADDPATH: |
406 | r->add_path = 1; |
407 | /* FALLTHROUGH */ |
408 | case MRT_DUMP_V2_RIB_IPV6_UNICAST: |
409 | case MRT_DUMP_V2_RIB_IPV6_MULTICAST: |
410 | /* prefix */ |
411 | ret = mrt_extract_prefix(b, len, AID_INET62, &r->prefix, |
412 | &r->prefixlen, verbose); |
413 | if (ret == 1) |
414 | goto fail; |
415 | break; |
416 | case MRT_DUMP_V2_RIB_GENERIC_ADDPATH: |
417 | /* |
418 | * RFC8050 handling for add-path has special handling for |
419 | * RIB_GENERIC_ADDPATH but nobody implements it that way. |
420 | * So just use the same way as for the other _ADDPATH types. |
421 | */ |
422 | r->add_path = 1; |
423 | /* FALLTHROUGH */ |
424 | case MRT_DUMP_V2_RIB_GENERIC: |
425 | /* fetch AFI/SAFI pair */ |
426 | if (len < 3) |
427 | goto fail; |
428 | memcpy(&afi, b, sizeof(afi)); |
429 | b += sizeof(afi); |
430 | len -= sizeof(afi); |
431 | afi = ntohs(afi)(__uint16_t)(__builtin_constant_p(afi) ? (__uint16_t)(((__uint16_t )(afi) & 0xffU) << 8 | ((__uint16_t)(afi) & 0xff00U ) >> 8) : __swap16md(afi)); |
432 | |
433 | safi = *b++; |
434 | len -= 1; |
435 | |
436 | if ((aid = mrt_afi2aid(afi, safi, verbose)) == AID_UNSPEC0) |
437 | goto fail; |
438 | |
439 | /* prefix */ |
440 | ret = mrt_extract_prefix(b, len, aid, &r->prefix, |
441 | &r->prefixlen, verbose); |
442 | if (ret == 1) |
443 | goto fail; |
444 | break; |
445 | default: |
446 | errx(1, "unknown 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))); |
447 | } |
448 | |
449 | /* adjust length */ |
450 | b += ret; |
451 | len -= ret; |
452 | |
453 | /* entries count */ |
454 | if (len < sizeof(cnt)) |
455 | goto fail; |
456 | memcpy(&cnt, b, sizeof(cnt)); |
457 | b += sizeof(cnt); |
458 | len -= sizeof(cnt); |
459 | cnt = ntohs(cnt)(__uint16_t)(__builtin_constant_p(cnt) ? (__uint16_t)(((__uint16_t )(cnt) & 0xffU) << 8 | ((__uint16_t)(cnt) & 0xff00U ) >> 8) : __swap16md(cnt)); |
460 | r->nentries = cnt; |
461 | |
462 | /* entries */ |
463 | if ((entries = calloc(cnt, sizeof(struct mrt_rib_entry))) == NULL((void *)0)) |
464 | err(1, "calloc"); |
465 | for (i = 0; i < cnt; i++) { |
466 | uint32_t otm; |
467 | uint16_t pix, alen; |
468 | if (len < 2 * sizeof(uint16_t) + sizeof(uint32_t)) |
469 | goto fail; |
470 | /* peer index */ |
471 | memcpy(&pix, b, sizeof(pix)); |
472 | b += sizeof(pix); |
473 | len -= sizeof(pix); |
474 | 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)); |
475 | |
476 | /* originated */ |
477 | memcpy(&otm, b, sizeof(otm)); |
478 | b += sizeof(otm); |
479 | len -= sizeof(otm); |
480 | 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)); |
481 | |
482 | if (r->add_path) { |
483 | if (len < sizeof(path_id) + sizeof(alen)) |
484 | goto fail; |
485 | memcpy(&path_id, b, sizeof(path_id)); |
486 | b += sizeof(path_id); |
487 | len -= sizeof(path_id); |
488 | 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)); |
489 | } |
490 | entries[i].path_id = path_id; |
491 | |
492 | /* attr_len */ |
493 | memcpy(&alen, b, sizeof(alen)); |
494 | b += sizeof(alen); |
495 | len -= sizeof(alen); |
496 | alen = ntohs(alen)(__uint16_t)(__builtin_constant_p(alen) ? (__uint16_t)(((__uint16_t )(alen) & 0xffU) << 8 | ((__uint16_t)(alen) & 0xff00U ) >> 8) : __swap16md(alen)); |
497 | |
498 | /* attr */ |
499 | if (len < alen) |
500 | goto fail; |
501 | if (mrt_extract_attr(&entries[i], b, alen, |
502 | r->prefix.aid, 1) == -1) |
503 | goto fail; |
504 | b += alen; |
505 | len -= alen; |
506 | } |
507 | r->entries = entries; |
508 | return (r); |
509 | fail: |
510 | mrt_free_rib(r); |
511 | free(entries); |
512 | return (NULL((void *)0)); |
513 | } |
514 | |
515 | int |
516 | mrt_parse_dump(struct mrt_hdr *hdr, void *msg, struct mrt_peer **pp, |
517 | struct mrt_rib **rp) |
518 | { |
519 | struct mrt_peer *p; |
520 | struct mrt_rib *r; |
521 | struct mrt_rib_entry *re; |
522 | uint8_t *b = msg; |
523 | 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 )); |
524 | uint16_t asnum, alen; |
525 | |
526 | if (*pp == NULL((void *)0)) { |
527 | *pp = calloc(1, sizeof(struct mrt_peer)); |
528 | if (*pp == NULL((void *)0)) |
529 | err(1, "calloc"); |
530 | (*pp)->peers = calloc(1, sizeof(struct mrt_peer_entry)); |
531 | if ((*pp)->peers == NULL((void *)0)) |
532 | err(1, "calloc"); |
533 | (*pp)->npeers = 1; |
534 | } |
535 | p = *pp; |
536 | |
537 | *rp = r = calloc(1, sizeof(struct mrt_rib)); |
538 | if (r == NULL((void *)0)) |
539 | err(1, "calloc"); |
540 | re = calloc(1, sizeof(struct mrt_rib_entry)); |
541 | if (re == NULL((void *)0)) |
542 | err(1, "calloc"); |
543 | r->nentries = 1; |
544 | r->entries = re; |
545 | |
546 | if (len < 2 * sizeof(uint16_t)) |
547 | goto fail; |
548 | /* view */ |
549 | b += sizeof(uint16_t); |
550 | len -= sizeof(uint16_t); |
551 | /* seqnum */ |
552 | memcpy(&r->seqnum, b, sizeof(uint16_t)); |
553 | b += sizeof(uint16_t); |
554 | len -= sizeof(uint16_t); |
555 | 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)); |
556 | |
557 | 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))) { |
558 | case MRT_DUMP_AFI_IP: |
559 | if (mrt_extract_addr(b, len, &r->prefix, AID_INET1) == -1) |
560 | goto fail; |
561 | b += sizeof(struct in_addr); |
562 | len -= sizeof(struct in_addr); |
563 | break; |
564 | case MRT_DUMP_AFI_IPv6: |
565 | if (mrt_extract_addr(b, len, &r->prefix, AID_INET62) == -1) |
566 | goto fail; |
567 | b += sizeof(struct in6_addr); |
568 | len -= sizeof(struct in6_addr); |
569 | break; |
570 | } |
571 | if (len < 2 * sizeof(uint32_t) + 2 * sizeof(uint16_t) + 2) |
572 | goto fail; |
573 | r->prefixlen = *b++; |
574 | len -= 1; |
575 | /* status */ |
576 | b += 1; |
577 | len -= 1; |
578 | /* originated */ |
579 | memcpy(&re->originated, b, sizeof(uint32_t)); |
580 | b += sizeof(uint32_t); |
581 | len -= sizeof(uint32_t); |
582 | 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)); |
583 | /* peer ip */ |
584 | 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))) { |
585 | case MRT_DUMP_AFI_IP: |
586 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET1) == -1) |
587 | goto fail; |
588 | b += sizeof(struct in_addr); |
589 | len -= sizeof(struct in_addr); |
590 | break; |
591 | case MRT_DUMP_AFI_IPv6: |
592 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET62) == -1) |
593 | goto fail; |
594 | b += sizeof(struct in6_addr); |
595 | len -= sizeof(struct in6_addr); |
596 | break; |
597 | } |
598 | memcpy(&asnum, b, sizeof(asnum)); |
599 | b += sizeof(asnum); |
600 | len -= sizeof(asnum); |
601 | 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)); |
602 | |
603 | memcpy(&alen, b, sizeof(alen)); |
604 | b += sizeof(alen); |
605 | len -= sizeof(alen); |
606 | alen = ntohs(alen)(__uint16_t)(__builtin_constant_p(alen) ? (__uint16_t)(((__uint16_t )(alen) & 0xffU) << 8 | ((__uint16_t)(alen) & 0xff00U ) >> 8) : __swap16md(alen)); |
607 | |
608 | /* attr */ |
609 | if (len < alen) |
610 | goto fail; |
611 | if (mrt_extract_attr(re, b, alen, r->prefix.aid, 0) == -1) |
612 | goto fail; |
613 | b += alen; |
614 | len -= alen; |
615 | |
616 | return (0); |
617 | fail: |
618 | mrt_free_rib(r); |
619 | return (-1); |
620 | } |
621 | |
622 | int |
623 | mrt_parse_dump_mp(struct mrt_hdr *hdr, void *msg, struct mrt_peer **pp, |
624 | struct mrt_rib **rp, int verbose) |
625 | { |
626 | struct mrt_peer *p; |
627 | struct mrt_rib *r; |
628 | struct mrt_rib_entry *re; |
629 | uint8_t *b = msg; |
630 | 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 )); |
631 | uint16_t asnum, alen, afi; |
632 | uint8_t safi, nhlen, aid; |
633 | int ret; |
634 | |
635 | /* just ignore the microsec field for _ET header for now */ |
636 | 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) { |
637 | b = (char *)b + sizeof(uint32_t); |
638 | len -= sizeof(uint32_t); |
639 | } |
640 | |
641 | if (*pp == NULL((void *)0)) { |
642 | *pp = calloc(1, sizeof(struct mrt_peer)); |
643 | if (*pp == NULL((void *)0)) |
644 | err(1, "calloc"); |
645 | (*pp)->peers = calloc(1, sizeof(struct mrt_peer_entry)); |
646 | if ((*pp)->peers == NULL((void *)0)) |
647 | err(1, "calloc"); |
648 | (*pp)->npeers = 1; |
649 | } |
650 | p = *pp; |
651 | |
652 | *rp = r = calloc(1, sizeof(struct mrt_rib)); |
653 | if (r == NULL((void *)0)) |
654 | err(1, "calloc"); |
655 | re = calloc(1, sizeof(struct mrt_rib_entry)); |
656 | if (re == NULL((void *)0)) |
657 | err(1, "calloc"); |
658 | r->nentries = 1; |
659 | r->entries = re; |
660 | |
661 | if (len < 4 * sizeof(uint16_t)) |
662 | goto fail; |
663 | /* source AS */ |
664 | b += sizeof(uint16_t); |
665 | len -= sizeof(uint16_t); |
666 | /* dest AS */ |
667 | memcpy(&asnum, b, sizeof(asnum)); |
668 | b += sizeof(asnum); |
669 | len -= sizeof(asnum); |
670 | 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)); |
671 | /* iface index */ |
672 | b += sizeof(uint16_t); |
673 | len -= sizeof(uint16_t); |
674 | /* afi */ |
675 | memcpy(&afi, b, sizeof(afi)); |
676 | b += sizeof(afi); |
677 | len -= sizeof(afi); |
678 | afi = ntohs(afi)(__uint16_t)(__builtin_constant_p(afi) ? (__uint16_t)(((__uint16_t )(afi) & 0xffU) << 8 | ((__uint16_t)(afi) & 0xff00U ) >> 8) : __swap16md(afi)); |
679 | |
680 | /* source + dest ip */ |
681 | switch (afi) { |
682 | case MRT_DUMP_AFI_IP: |
683 | if (len < 2 * sizeof(struct in_addr)) |
684 | goto fail; |
685 | /* source IP */ |
686 | b += sizeof(struct in_addr); |
687 | len -= sizeof(struct in_addr); |
688 | /* dest IP */ |
689 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET1) == -1) |
690 | goto fail; |
691 | b += sizeof(struct in_addr); |
692 | len -= sizeof(struct in_addr); |
693 | break; |
694 | case MRT_DUMP_AFI_IPv6: |
695 | if (len < 2 * sizeof(struct in6_addr)) |
696 | goto fail; |
697 | /* source IP */ |
698 | b += sizeof(struct in6_addr); |
699 | len -= sizeof(struct in6_addr); |
700 | /* dest IP */ |
701 | if (mrt_extract_addr(b, len, &p->peers->addr, AID_INET62) == -1) |
702 | goto fail; |
703 | b += sizeof(struct in6_addr); |
704 | len -= sizeof(struct in6_addr); |
705 | break; |
706 | } |
707 | |
708 | if (len < 2 * sizeof(uint16_t) + 2 * sizeof(uint32_t)) |
709 | goto fail; |
710 | /* view + status */ |
711 | b += 2 * sizeof(uint16_t); |
712 | len -= 2 * sizeof(uint16_t); |
713 | /* originated */ |
714 | memcpy(&re->originated, b, sizeof(uint32_t)); |
715 | b += sizeof(uint32_t); |
716 | len -= sizeof(uint32_t); |
717 | 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)); |
718 | |
719 | /* afi */ |
720 | memcpy(&afi, b, sizeof(afi)); |
721 | b += sizeof(afi); |
722 | len -= sizeof(afi); |
723 | afi = ntohs(afi)(__uint16_t)(__builtin_constant_p(afi) ? (__uint16_t)(((__uint16_t )(afi) & 0xffU) << 8 | ((__uint16_t)(afi) & 0xff00U ) >> 8) : __swap16md(afi)); |
724 | |
725 | /* safi */ |
726 | safi = *b++; |
727 | len -= 1; |
728 | |
729 | if ((aid = mrt_afi2aid(afi, safi, verbose)) == AID_UNSPEC0) |
730 | goto fail; |
731 | |
732 | /* nhlen */ |
733 | nhlen = *b++; |
734 | len -= 1; |
735 | |
736 | /* nexthop */ |
737 | if (mrt_extract_addr(b, len, &re->nexthop, aid) == -1) |
738 | goto fail; |
739 | if (len < nhlen) |
740 | goto fail; |
741 | b += nhlen; |
742 | len -= nhlen; |
743 | |
744 | /* prefix */ |
745 | ret = mrt_extract_prefix(b, len, aid, &r->prefix, &r->prefixlen, |
746 | verbose); |
747 | if (ret == 1) |
748 | goto fail; |
749 | b += ret; |
750 | len -= ret; |
751 | |
752 | memcpy(&alen, b, sizeof(alen)); |
753 | b += sizeof(alen); |
754 | len -= sizeof(alen); |
755 | alen = ntohs(alen)(__uint16_t)(__builtin_constant_p(alen) ? (__uint16_t)(((__uint16_t )(alen) & 0xffU) << 8 | ((__uint16_t)(alen) & 0xff00U ) >> 8) : __swap16md(alen)); |
756 | |
757 | /* attr */ |
758 | if (len < alen) |
759 | goto fail; |
760 | if (mrt_extract_attr(re, b, alen, r->prefix.aid, 0) == -1) |
761 | goto fail; |
762 | b += alen; |
763 | len -= alen; |
764 | |
765 | return (0); |
766 | fail: |
767 | mrt_free_rib(r); |
768 | return (-1); |
769 | } |
770 | |
771 | int |
772 | mrt_extract_attr(struct mrt_rib_entry *re, u_char *a, int alen, uint8_t aid, |
773 | int as4) |
774 | { |
775 | struct mrt_attr *ap; |
776 | uint32_t tmp; |
777 | uint16_t attr_len; |
778 | uint8_t type, flags, *attr; |
779 | |
780 | do { |
781 | if (alen < 3) |
782 | return (-1); |
783 | attr = a; |
784 | flags = *a++; |
785 | alen -= 1; |
786 | type = *a++; |
787 | alen -= 1; |
788 | |
789 | if (flags & MRT_ATTR_EXTLEN0x10) { |
790 | if (alen < 2) |
791 | return (-1); |
792 | memcpy(&attr_len, a, sizeof(attr_len)); |
793 | 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)); |
794 | a += sizeof(attr_len); |
795 | alen -= sizeof(attr_len); |
796 | } else { |
797 | attr_len = *a++; |
798 | alen -= 1; |
799 | } |
800 | switch (type) { |
801 | case MRT_ATTR_ORIGIN1: |
802 | if (attr_len != 1) |
803 | return (-1); |
804 | re->origin = *a; |
805 | break; |
806 | case MRT_ATTR_ASPATH2: |
807 | if (as4) { |
808 | re->aspath_len = attr_len; |
809 | if ((re->aspath = malloc(attr_len)) == NULL((void *)0)) |
810 | err(1, "malloc"); |
811 | memcpy(re->aspath, a, attr_len); |
812 | } else { |
813 | re->aspath = mrt_aspath_inflate(a, attr_len, |
814 | &re->aspath_len); |
815 | if (re->aspath == NULL((void *)0)) |
816 | return (-1); |
817 | } |
818 | break; |
819 | case MRT_ATTR_NEXTHOP3: |
820 | if (attr_len != 4) |
821 | return (-1); |
822 | if (aid != AID_INET1) |
823 | break; |
824 | memcpy(&tmp, a, sizeof(tmp)); |
825 | re->nexthop.aid = AID_INET1; |
826 | re->nexthop.v4ba.v4.s_addr = tmp; |
827 | break; |
828 | case MRT_ATTR_MED4: |
829 | if (attr_len != 4) |
830 | return (-1); |
831 | memcpy(&tmp, a, sizeof(tmp)); |
832 | 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)); |
833 | break; |
834 | case MRT_ATTR_LOCALPREF5: |
835 | if (attr_len != 4) |
836 | return (-1); |
837 | memcpy(&tmp, a, sizeof(tmp)); |
838 | 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)); |
839 | break; |
840 | case MRT_ATTR_MP_REACH_NLRI14: |
841 | /* |
842 | * XXX horrible hack: |
843 | * Once again IETF and the real world differ in the |
844 | * implementation. In short the abbreviated MP_NLRI |
845 | * hack in the standard is not used in real life. |
846 | * Detect the two cases by looking at the first byte |
847 | * of the payload (either the nexthop addr length (RFC) |
848 | * or the high byte of the AFI (old form)). If the |
849 | * first byte matches the expected nexthop length it |
850 | * is expected to be the RFC 6396 encoding. |
851 | */ |
852 | if (*a != attr_len - 1) { |
853 | a += 3; |
854 | alen -= 3; |
855 | attr_len -= 3; |
856 | } |
857 | switch (aid) { |
858 | case AID_INET62: |
859 | if (attr_len < sizeof(struct in6_addr) + 1) |
860 | return (-1); |
861 | re->nexthop.aid = aid; |
862 | memcpy(&re->nexthop.v6ba.v6, a + 1, |
863 | sizeof(struct in6_addr)); |
864 | break; |
865 | case AID_VPN_IPv43: |
866 | if (attr_len < sizeof(uint64_t) + |
867 | sizeof(struct in_addr)) |
868 | return (-1); |
869 | re->nexthop.aid = aid; |
870 | memcpy(&tmp, a + 1 + sizeof(uint64_t), |
871 | sizeof(tmp)); |
872 | re->nexthop.v4ba.v4.s_addr = tmp; |
873 | break; |
874 | case AID_VPN_IPv64: |
875 | if (attr_len < sizeof(uint64_t) + |
876 | sizeof(struct in6_addr)) |
877 | return (-1); |
878 | re->nexthop.aid = aid; |
879 | memcpy(&re->nexthop.v6ba.v6, |
880 | a + 1 + sizeof(uint64_t), |
881 | sizeof(struct in6_addr)); |
882 | break; |
883 | } |
884 | break; |
885 | case MRT_ATTR_AS4PATH17: |
886 | if (!as4) { |
887 | free(re->aspath); |
888 | re->aspath_len = attr_len; |
889 | if ((re->aspath = malloc(attr_len)) == NULL((void *)0)) |
890 | err(1, "malloc"); |
891 | memcpy(re->aspath, a, attr_len); |
892 | break; |
893 | } |
894 | /* FALLTHROUGH */ |
895 | default: |
896 | re->nattrs++; |
897 | if (re->nattrs >= UCHAR_MAX0xff) |
898 | err(1, "too many attributes"); |
899 | ap = reallocarray(re->attrs, |
900 | re->nattrs, sizeof(struct mrt_attr)); |
901 | if (ap == NULL((void *)0)) |
902 | err(1, "realloc"); |
903 | re->attrs = ap; |
904 | ap = re->attrs + re->nattrs - 1; |
905 | ap->attr_len = a + attr_len - attr; |
906 | if ((ap->attr = malloc(ap->attr_len)) == NULL((void *)0)) |
907 | err(1, "malloc"); |
908 | memcpy(ap->attr, attr, ap->attr_len); |
909 | break; |
910 | } |
911 | a += attr_len; |
912 | alen -= attr_len; |
913 | } while (alen > 0); |
914 | |
915 | return (0); |
916 | } |
917 | |
918 | void |
919 | mrt_free_peers(struct mrt_peer *p) |
920 | { |
921 | free(p->peers); |
922 | free(p->view); |
923 | free(p); |
924 | } |
925 | |
926 | void |
927 | mrt_free_rib(struct mrt_rib *r) |
928 | { |
929 | uint16_t i, j; |
930 | |
931 | for (i = 0; i < r->nentries && r->entries; i++) { |
932 | for (j = 0; j < r->entries[i].nattrs; j++) |
933 | free(r->entries[i].attrs[j].attr); |
934 | free(r->entries[i].attrs); |
935 | free(r->entries[i].aspath); |
936 | } |
937 | |
938 | free(r->entries); |
939 | free(r); |
940 | } |
941 | |
942 | void |
943 | mrt_free_bgp_state(struct mrt_bgp_state *s) |
944 | { |
945 | free(s); |
946 | } |
947 | |
948 | void |
949 | mrt_free_bgp_msg(struct mrt_bgp_msg *m) |
950 | { |
951 | free(m->msg); |
952 | free(m); |
953 | } |
954 | |
955 | u_char * |
956 | mrt_aspath_inflate(void *data, uint16_t len, uint16_t *newlen) |
957 | { |
958 | uint8_t *seg, *nseg, *ndata; |
959 | uint16_t seg_size, olen, nlen; |
960 | uint8_t seg_len; |
961 | |
962 | /* first calculate the length of the aspath */ |
963 | seg = data; |
964 | nlen = 0; |
965 | for (olen = len; olen > 0; olen -= seg_size, seg += seg_size) { |
966 | seg_len = seg[1]; |
967 | seg_size = 2 + sizeof(uint16_t) * seg_len; |
968 | nlen += 2 + sizeof(uint32_t) * seg_len; |
969 | |
970 | if (seg_size > olen) |
971 | return NULL((void *)0); |
972 | } |
973 | |
974 | *newlen = nlen; |
975 | if ((ndata = malloc(nlen)) == NULL((void *)0)) |
976 | err(1, "malloc"); |
977 | |
978 | /* then copy the aspath */ |
979 | seg = data; |
980 | for (nseg = ndata; nseg < ndata + nlen; ) { |
981 | *nseg++ = *seg++; |
982 | *nseg++ = seg_len = *seg++; |
983 | for (; seg_len > 0; seg_len--) { |
984 | *nseg++ = 0; |
985 | *nseg++ = 0; |
986 | *nseg++ = *seg++; |
987 | *nseg++ = *seg++; |
988 | } |
989 | } |
990 | |
991 | return (ndata); |
992 | } |
993 | |
994 | int |
995 | mrt_extract_addr(void *msg, u_int len, struct bgpd_addr *addr, uint8_t aid) |
996 | { |
997 | uint8_t *b = msg; |
998 | |
999 | memset(addr, 0, sizeof(*addr)); |
1000 | switch (aid) { |
1001 | case AID_INET1: |
1002 | if (len < sizeof(struct in_addr)) |
1003 | return (-1); |
1004 | addr->aid = aid; |
1005 | memcpy(&addr->v4ba.v4, b, sizeof(struct in_addr)); |
1006 | return sizeof(struct in_addr); |
1007 | case AID_INET62: |
1008 | if (len < sizeof(struct in6_addr)) |
1009 | return (-1); |
1010 | addr->aid = aid; |
1011 | memcpy(&addr->v6ba.v6, b, sizeof(struct in6_addr)); |
1012 | return sizeof(struct in6_addr); |
1013 | case AID_VPN_IPv43: |
1014 | if (len < sizeof(uint64_t) + sizeof(struct in_addr)) |
1015 | return (-1); |
1016 | addr->aid = aid; |
1017 | /* XXX labelstack and rd missing */ |
1018 | memcpy(&addr->v4ba.v4, b + sizeof(uint64_t), |
1019 | sizeof(struct in_addr)); |
1020 | return (sizeof(uint64_t) + sizeof(struct in_addr)); |
1021 | case AID_VPN_IPv64: |
1022 | if (len < sizeof(uint64_t) + sizeof(struct in6_addr)) |
1023 | return (-1); |
1024 | addr->aid = aid; |
1025 | /* XXX labelstack and rd missing */ |
1026 | memcpy(&addr->v6ba.v6, b + sizeof(uint64_t), |
1027 | sizeof(struct in6_addr)); |
1028 | return (sizeof(uint64_t) + sizeof(struct in6_addr)); |
1029 | default: |
1030 | return (-1); |
1031 | } |
1032 | } |
1033 | |
1034 | int |
1035 | mrt_extract_prefix(void *msg, u_int len, uint8_t aid, |
1036 | struct bgpd_addr *prefix, uint8_t *prefixlen, int verbose) |
1037 | { |
1038 | int r; |
1039 | |
1040 | switch (aid) { |
1041 | case AID_INET1: |
1042 | r = nlri_get_prefix(msg, len, prefix, prefixlen); |
1043 | break; |
1044 | case AID_INET62: |
1045 | r = nlri_get_prefix6(msg, len, prefix, prefixlen); |
1046 | break; |
1047 | case AID_VPN_IPv43: |
1048 | r = nlri_get_vpn4(msg, len, prefix, prefixlen, 0); |
1049 | break; |
1050 | case AID_VPN_IPv64: |
1051 | r = nlri_get_vpn6(msg, len, prefix, prefixlen, 0); |
1052 | break; |
1053 | default: |
1054 | if (verbose) |
1055 | printf("unknown prefix AID %d\n", aid); |
1056 | return -1; |
1057 | } |
1058 | if (r == -1 && verbose) |
1059 | printf("failed to parse prefix of AID %d\n", aid); |
1060 | return r; |
1061 | } |
1062 | |
1063 | struct mrt_bgp_state * |
1064 | mrt_parse_state(struct mrt_hdr *hdr, void *msg, int verbose) |
1065 | { |
1066 | struct timespec t; |
1067 | struct mrt_bgp_state *s; |
1068 | uint8_t *b = msg; |
1069 | 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 )); |
1070 | uint32_t sas, das, usec; |
1071 | uint16_t tmp16, afi; |
1072 | int r; |
1073 | uint8_t aid; |
1074 | |
1075 | 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)); |
1076 | t.tv_nsec = 0; |
1077 | |
1078 | /* handle the microsec field for _ET header */ |
1079 | 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) { |
1080 | memcpy(&usec, b, sizeof(usec)); |
1081 | b += sizeof(usec); |
1082 | len -= sizeof(usec); |
1083 | 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; |
1084 | } |
1085 | |
1086 | 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))) { |
1087 | case BGP4MP_STATE_CHANGE: |
1088 | if (len < 8) |
1089 | return (0); |
1090 | /* source as */ |
1091 | memcpy(&tmp16, b, sizeof(tmp16)); |
1092 | b += sizeof(tmp16); |
1093 | len -= sizeof(tmp16); |
1094 | sas = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1095 | /* dest as */ |
1096 | memcpy(&tmp16, b, sizeof(tmp16)); |
1097 | b += sizeof(tmp16); |
1098 | len -= sizeof(tmp16); |
1099 | das = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1100 | /* if_index, ignored */ |
1101 | b += sizeof(tmp16); |
1102 | len -= sizeof(tmp16); |
1103 | /* afi */ |
1104 | memcpy(&tmp16, b, sizeof(tmp16)); |
1105 | b += sizeof(tmp16); |
1106 | len -= sizeof(tmp16); |
1107 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1108 | break; |
1109 | case BGP4MP_STATE_CHANGE_AS4: |
1110 | if (len < 12) |
1111 | return (0); |
1112 | /* source as */ |
1113 | memcpy(&sas, b, sizeof(sas)); |
1114 | b += sizeof(sas); |
1115 | len -= sizeof(sas); |
1116 | 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)); |
1117 | /* dest as */ |
1118 | memcpy(&das, b, sizeof(das)); |
1119 | b += sizeof(das); |
1120 | len -= sizeof(das); |
1121 | 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)); |
1122 | /* if_index, ignored */ |
1123 | b += sizeof(tmp16); |
1124 | len -= sizeof(tmp16); |
1125 | /* afi */ |
1126 | memcpy(&tmp16, b, sizeof(tmp16)); |
1127 | b += sizeof(tmp16); |
1128 | len -= sizeof(tmp16); |
1129 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1130 | break; |
1131 | default: |
1132 | errx(1, "mrt_parse_state: bad subtype"); |
1133 | } |
1134 | |
1135 | /* src & dst addr */ |
1136 | if ((aid = mrt_afi2aid(afi, -1, verbose)) == AID_UNSPEC0) |
1137 | return (NULL((void *)0)); |
1138 | |
1139 | if ((s = calloc(1, sizeof(struct mrt_bgp_state))) == NULL((void *)0)) |
1140 | err(1, "calloc"); |
1141 | s->time = t; |
1142 | s->src_as = sas; |
1143 | s->dst_as = das; |
1144 | |
1145 | if ((r = mrt_extract_addr(b, len, &s->src, aid)) == -1) |
1146 | goto fail; |
1147 | b += r; |
1148 | len -= r; |
1149 | if ((r = mrt_extract_addr(b, len, &s->dst, aid)) == -1) |
1150 | goto fail; |
1151 | b += r; |
1152 | len -= r; |
1153 | |
1154 | /* states */ |
1155 | memcpy(&tmp16, b, sizeof(tmp16)); |
1156 | b += sizeof(tmp16); |
1157 | len -= sizeof(tmp16); |
1158 | 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)); |
1159 | memcpy(&tmp16, b, sizeof(tmp16)); |
1160 | b += sizeof(tmp16); |
1161 | len -= sizeof(tmp16); |
Value stored to 'len' is never read | |
1162 | 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)); |
1163 | |
1164 | return (s); |
1165 | |
1166 | fail: |
1167 | free(s); |
1168 | return (NULL((void *)0)); |
1169 | } |
1170 | |
1171 | struct mrt_bgp_msg * |
1172 | mrt_parse_msg(struct mrt_hdr *hdr, void *msg, int verbose) |
1173 | { |
1174 | struct timespec t; |
1175 | struct mrt_bgp_msg *m; |
1176 | uint8_t *b = msg; |
1177 | 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 )); |
1178 | uint32_t sas, das, usec; |
1179 | uint16_t tmp16, afi; |
1180 | int r, addpath = 0; |
1181 | uint8_t aid; |
1182 | |
1183 | 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)); |
1184 | t.tv_nsec = 0; |
1185 | |
1186 | /* handle the microsec field for _ET header */ |
1187 | 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) { |
1188 | memcpy(&usec, b, sizeof(usec)); |
1189 | b += sizeof(usec); |
1190 | len -= sizeof(usec); |
1191 | 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; |
1192 | } |
1193 | |
1194 | 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))) { |
1195 | case BGP4MP_MESSAGE_ADDPATH: |
1196 | case BGP4MP_MESSAGE_LOCAL_ADDPATH: |
1197 | addpath = 1; |
1198 | /* FALLTHROUGH */ |
1199 | case BGP4MP_MESSAGE: |
1200 | case BGP4MP_MESSAGE_LOCAL: |
1201 | if (len < 8) |
1202 | return (0); |
1203 | /* source as */ |
1204 | memcpy(&tmp16, b, sizeof(tmp16)); |
1205 | b += sizeof(tmp16); |
1206 | len -= sizeof(tmp16); |
1207 | sas = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1208 | /* dest as */ |
1209 | memcpy(&tmp16, b, sizeof(tmp16)); |
1210 | b += sizeof(tmp16); |
1211 | len -= sizeof(tmp16); |
1212 | das = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1213 | /* if_index, ignored */ |
1214 | b += sizeof(tmp16); |
1215 | len -= sizeof(tmp16); |
1216 | /* afi */ |
1217 | memcpy(&tmp16, b, sizeof(tmp16)); |
1218 | b += sizeof(tmp16); |
1219 | len -= sizeof(tmp16); |
1220 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1221 | break; |
1222 | case BGP4MP_MESSAGE_AS4_ADDPATH: |
1223 | case BGP4MP_MESSAGE_AS4_LOCAL_ADDPATH: |
1224 | addpath = 1; |
1225 | /* FALLTHROUGH */ |
1226 | case BGP4MP_MESSAGE_AS4: |
1227 | case BGP4MP_MESSAGE_AS4_LOCAL: |
1228 | if (len < 12) |
1229 | return (0); |
1230 | /* source as */ |
1231 | memcpy(&sas, b, sizeof(sas)); |
1232 | b += sizeof(sas); |
1233 | len -= sizeof(sas); |
1234 | 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)); |
1235 | /* dest as */ |
1236 | memcpy(&das, b, sizeof(das)); |
1237 | b += sizeof(das); |
1238 | len -= sizeof(das); |
1239 | 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)); |
1240 | /* if_index, ignored */ |
1241 | b += sizeof(tmp16); |
1242 | len -= sizeof(tmp16); |
1243 | /* afi */ |
1244 | memcpy(&tmp16, b, sizeof(tmp16)); |
1245 | b += sizeof(tmp16); |
1246 | len -= sizeof(tmp16); |
1247 | afi = ntohs(tmp16)(__uint16_t)(__builtin_constant_p(tmp16) ? (__uint16_t)(((__uint16_t )(tmp16) & 0xffU) << 8 | ((__uint16_t)(tmp16) & 0xff00U) >> 8) : __swap16md(tmp16)); |
1248 | break; |
1249 | default: |
1250 | errx(1, "mrt_parse_msg: bad subtype"); |
1251 | } |
1252 | |
1253 | /* src & dst addr */ |
1254 | if ((aid = mrt_afi2aid(afi, -1, verbose)) == AID_UNSPEC0) |
1255 | return (NULL((void *)0)); |
1256 | |
1257 | if ((m = calloc(1, sizeof(struct mrt_bgp_msg))) == NULL((void *)0)) |
1258 | err(1, "calloc"); |
1259 | m->time = t; |
1260 | m->src_as = sas; |
1261 | m->dst_as = das; |
1262 | m->add_path = addpath; |
1263 | |
1264 | if ((r = mrt_extract_addr(b, len, &m->src, aid)) == -1) |
1265 | goto fail; |
1266 | b += r; |
1267 | len -= r; |
1268 | if ((r = mrt_extract_addr(b, len, &m->dst, aid)) == -1) |
1269 | goto fail; |
1270 | b += r; |
1271 | len -= r; |
1272 | |
1273 | /* msg */ |
1274 | if (len > 0) { |
1275 | m->msg_len = len; |
1276 | if ((m->msg = malloc(len)) == NULL((void *)0)) |
1277 | err(1, "malloc"); |
1278 | memcpy(m->msg, b, len); |
1279 | } |
1280 | |
1281 | return (m); |
1282 | |
1283 | fail: |
1284 | free(m->msg); |
1285 | free(m); |
1286 | return (NULL((void *)0)); |
1287 | } |