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034cdee9 PG |
1 | /* BGP FlowSpec Utilities |
2 | * Portions: | |
3 | * Copyright (C) 2017 ChinaTelecom SDN Group | |
4 | * Copyright (C) 2018 6WIND | |
5 | * | |
6 | * FRRouting is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * FRRouting is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "zebra.h" | |
22 | ||
23 | #include "prefix.h" | |
02705213 | 24 | #include "lib_errors.h" |
98a9dbc7 PG |
25 | |
26 | #include "bgp_table.h" | |
034cdee9 | 27 | #include "bgp_flowspec_util.h" |
98a9dbc7 | 28 | #include "bgp_flowspec_private.h" |
47555ee9 | 29 | #include "bgp_pbr.h" |
4f3be667 | 30 | #include "bgp_errors.h" |
034cdee9 PG |
31 | |
32 | static void hex2bin(uint8_t *hex, int *bin) | |
33 | { | |
34 | int remainder = *hex; | |
35 | int i = 0; | |
36 | ||
37 | while (remainder >= 1 && i < 8) { | |
38 | bin[7-i] = remainder % 2; | |
39 | remainder = remainder / 2; | |
40 | i++; | |
41 | } | |
42 | for (; i < 8; i++) | |
43 | bin[7-i] = 0; | |
44 | } | |
45 | ||
46 | static int hexstr2num(uint8_t *hexstr, int len) | |
47 | { | |
48 | int i = 0; | |
49 | int num = 0; | |
50 | ||
51 | for (i = 0; i < len; i++) | |
52 | num = hexstr[i] + 16*16*num; | |
53 | return num; | |
54 | } | |
55 | ||
47555ee9 PG |
56 | /* call bgp_flowspec_op_decode |
57 | * returns offset | |
58 | */ | |
59 | static int bgp_flowspec_call_non_opaque_decode(uint8_t *nlri_content, int len, | |
60 | struct bgp_pbr_match_val *mval, | |
61 | uint8_t *match_num, int *error) | |
62 | { | |
63 | int ret; | |
64 | ||
65 | ret = bgp_flowspec_op_decode( | |
66 | BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE, | |
67 | nlri_content, | |
68 | len, | |
69 | mval, error); | |
70 | if (*error < 0) | |
af4c2728 | 71 | flog_err(BGP_ERR_FLOWSPEC_PACKET, |
4f3be667 DS |
72 | "%s: flowspec_op_decode error %d", |
73 | __func__, *error); | |
47555ee9 PG |
74 | else |
75 | *match_num = *error; | |
76 | return ret; | |
77 | } | |
78 | ||
63a0b7a9 PG |
79 | bool bgp_flowspec_contains_prefix(struct prefix *pfs, |
80 | struct prefix *input, | |
81 | int prefix_check) | |
47555ee9 PG |
82 | { |
83 | uint32_t offset = 0; | |
84 | int type; | |
85 | int ret = 0, error = 0; | |
86 | uint8_t *nlri_content = (uint8_t *)pfs->u.prefix_flowspec.ptr; | |
87 | size_t len = pfs->u.prefix_flowspec.prefixlen; | |
88 | struct prefix compare; | |
89 | ||
90 | error = 0; | |
91 | while (offset < len-1 && error >= 0) { | |
92 | type = nlri_content[offset]; | |
93 | offset++; | |
94 | switch (type) { | |
95 | case FLOWSPEC_DEST_PREFIX: | |
96 | case FLOWSPEC_SRC_PREFIX: | |
97 | memset(&compare, 0, sizeof(struct prefix)); | |
98 | ret = bgp_flowspec_ip_address( | |
99 | BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE, | |
100 | nlri_content+offset, | |
101 | len - offset, | |
102 | &compare, &error); | |
103 | if (ret <= 0) | |
104 | break; | |
105 | if (prefix_check && | |
106 | compare.prefixlen != input->prefixlen) | |
107 | break; | |
108 | if (compare.family != input->family) | |
109 | break; | |
110 | if ((input->family == AF_INET) && | |
111 | IPV4_ADDR_SAME(&input->u.prefix4, | |
112 | &compare.u.prefix4)) | |
113 | return true; | |
114 | if ((input->family == AF_INET6) && | |
115 | IPV6_ADDR_SAME(&input->u.prefix6.s6_addr, | |
116 | &compare.u.prefix6.s6_addr)) | |
117 | return true; | |
118 | break; | |
119 | case FLOWSPEC_IP_PROTOCOL: | |
120 | case FLOWSPEC_PORT: | |
121 | case FLOWSPEC_DEST_PORT: | |
122 | case FLOWSPEC_SRC_PORT: | |
123 | case FLOWSPEC_ICMP_TYPE: | |
124 | case FLOWSPEC_ICMP_CODE: | |
125 | ret = bgp_flowspec_op_decode(BGP_FLOWSPEC_VALIDATE_ONLY, | |
126 | nlri_content+offset, | |
127 | len - offset, | |
128 | NULL, &error); | |
129 | break; | |
588ec356 | 130 | case FLOWSPEC_FRAGMENT: |
47555ee9 | 131 | case FLOWSPEC_TCP_FLAGS: |
588ec356 | 132 | ret = bgp_flowspec_bitmask_decode( |
47555ee9 PG |
133 | BGP_FLOWSPEC_VALIDATE_ONLY, |
134 | nlri_content+offset, | |
135 | len - offset, | |
136 | NULL, &error); | |
137 | break; | |
138 | case FLOWSPEC_PKT_LEN: | |
139 | case FLOWSPEC_DSCP: | |
140 | ret = bgp_flowspec_op_decode( | |
141 | BGP_FLOWSPEC_VALIDATE_ONLY, | |
142 | nlri_content + offset, | |
143 | len - offset, NULL, | |
144 | &error); | |
145 | break; | |
47555ee9 PG |
146 | default: |
147 | error = -1; | |
148 | break; | |
149 | } | |
150 | offset += ret; | |
151 | } | |
152 | return false; | |
153 | } | |
034cdee9 PG |
154 | |
155 | /* | |
156 | * handle the flowspec address src/dst or generic address NLRI | |
157 | * return number of bytes analysed ( >= 0). | |
158 | */ | |
159 | int bgp_flowspec_ip_address(enum bgp_flowspec_util_nlri_t type, | |
160 | uint8_t *nlri_ptr, | |
161 | uint32_t max_len, | |
162 | void *result, int *error) | |
163 | { | |
164 | char *display = (char *)result; /* for return_string */ | |
165 | struct prefix *prefix = (struct prefix *)result; | |
166 | uint32_t offset = 0; | |
167 | struct prefix prefix_local; | |
168 | int psize; | |
169 | ||
170 | *error = 0; | |
171 | memset(&prefix_local, 0, sizeof(struct prefix)); | |
172 | /* read the prefix length */ | |
173 | prefix_local.prefixlen = nlri_ptr[offset]; | |
174 | psize = PSIZE(prefix_local.prefixlen); | |
175 | offset++; | |
176 | /* TODO Flowspec IPv6 Support */ | |
177 | prefix_local.family = AF_INET; | |
178 | /* Prefix length check. */ | |
179 | if (prefix_local.prefixlen > prefix_blen(&prefix_local) * 8) | |
180 | *error = -1; | |
181 | /* When packet overflow occur return immediately. */ | |
182 | if (psize + offset > max_len) | |
183 | *error = -1; | |
184 | /* Defensive coding, double-check | |
185 | * the psize fits in a struct prefix | |
186 | */ | |
187 | if (psize > (ssize_t)sizeof(prefix_local.u)) | |
188 | *error = -1; | |
189 | memcpy(&prefix_local.u.prefix, &nlri_ptr[offset], psize); | |
190 | offset += psize; | |
191 | switch (type) { | |
192 | case BGP_FLOWSPEC_RETURN_STRING: | |
193 | prefix2str(&prefix_local, display, | |
194 | BGP_FLOWSPEC_STRING_DISPLAY_MAX); | |
195 | break; | |
196 | case BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE: | |
197 | PREFIX_COPY_IPV4(prefix, &prefix_local) | |
198 | break; | |
199 | case BGP_FLOWSPEC_VALIDATE_ONLY: | |
200 | default: | |
201 | break; | |
202 | } | |
203 | return offset; | |
204 | } | |
205 | ||
206 | /* | |
207 | * handle the flowspec operator NLRI | |
208 | * return number of bytes analysed | |
209 | * if there is an error, the passed error param is used to give error: | |
210 | * -1 if decoding error, | |
362a06e3 PG |
211 | * if result is a string, its assumed length |
212 | * is BGP_FLOWSPEC_STRING_DISPLAY_MAX | |
034cdee9 PG |
213 | */ |
214 | int bgp_flowspec_op_decode(enum bgp_flowspec_util_nlri_t type, | |
215 | uint8_t *nlri_ptr, | |
216 | uint32_t max_len, | |
217 | void *result, int *error) | |
218 | { | |
219 | int op[8]; | |
220 | int len, value, value_size; | |
221 | int loop = 0; | |
222 | char *ptr = (char *)result; /* for return_string */ | |
223 | uint32_t offset = 0; | |
362a06e3 PG |
224 | int len_string = BGP_FLOWSPEC_STRING_DISPLAY_MAX; |
225 | int len_written; | |
47555ee9 | 226 | struct bgp_pbr_match_val *mval = (struct bgp_pbr_match_val *)result; |
034cdee9 PG |
227 | |
228 | *error = 0; | |
229 | do { | |
47555ee9 PG |
230 | if (loop > BGP_PBR_MATCH_VAL_MAX) |
231 | *error = -2; | |
034cdee9 PG |
232 | hex2bin(&nlri_ptr[offset], op); |
233 | offset++; | |
234 | len = 2*op[2]+op[3]; | |
235 | value_size = 1 << len; | |
236 | value = hexstr2num(&nlri_ptr[offset], value_size); | |
237 | /* can not be < and > at the same time */ | |
238 | if (op[5] == 1 && op[6] == 1) | |
239 | *error = -1; | |
240 | /* if first element, AND bit can not be set */ | |
241 | if (op[1] == 1 && loop == 0) | |
242 | *error = -1; | |
243 | switch (type) { | |
244 | case BGP_FLOWSPEC_RETURN_STRING: | |
362a06e3 PG |
245 | if (loop) { |
246 | len_written = snprintf(ptr, len_string, | |
247 | ", "); | |
248 | len_string -= len_written; | |
249 | ptr += len_written; | |
250 | } | |
251 | if (op[5] == 1) { | |
252 | len_written = snprintf(ptr, len_string, | |
253 | "<"); | |
254 | len_string -= len_written; | |
255 | ptr += len_written; | |
256 | } | |
257 | if (op[6] == 1) { | |
258 | len_written = snprintf(ptr, len_string, | |
259 | ">"); | |
260 | len_string -= len_written; | |
261 | ptr += len_written; | |
262 | } | |
263 | if (op[7] == 1) { | |
264 | len_written = snprintf(ptr, len_string, | |
265 | "="); | |
266 | len_string -= len_written; | |
267 | ptr += len_written; | |
268 | } | |
269 | len_written = snprintf(ptr, len_string, | |
270 | " %d ", value); | |
271 | len_string -= len_written; | |
272 | ptr += len_written; | |
034cdee9 PG |
273 | break; |
274 | case BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE: | |
47555ee9 PG |
275 | /* limitation: stop converting */ |
276 | if (*error == -2) | |
277 | break; | |
278 | mval->value = value; | |
279 | if (op[5] == 1) | |
280 | mval->compare_operator |= | |
281 | OPERATOR_COMPARE_LESS_THAN; | |
282 | if (op[6] == 1) | |
283 | mval->compare_operator |= | |
284 | OPERATOR_COMPARE_GREATER_THAN; | |
285 | if (op[7] == 1) | |
286 | mval->compare_operator |= | |
287 | OPERATOR_COMPARE_EQUAL_TO; | |
288 | if (op[1] == 1) | |
289 | mval->unary_operator = OPERATOR_UNARY_AND; | |
290 | else | |
291 | mval->unary_operator = OPERATOR_UNARY_OR; | |
292 | mval++; | |
034cdee9 PG |
293 | break; |
294 | case BGP_FLOWSPEC_VALIDATE_ONLY: | |
295 | default: | |
296 | /* no action */ | |
297 | break; | |
298 | } | |
299 | offset += value_size; | |
300 | loop++; | |
301 | } while (op[0] == 0 && offset < max_len - 1); | |
302 | if (offset > max_len) | |
303 | *error = -1; | |
304 | /* use error parameter to count the number of entries */ | |
305 | if (*error == 0) | |
306 | *error = loop; | |
307 | return offset; | |
308 | } | |
309 | ||
310 | ||
311 | /* | |
588ec356 | 312 | * handle the flowspec tcpflags or fragment field |
034cdee9 PG |
313 | * return number of bytes analysed |
314 | * if there is an error, the passed error param is used to give error: | |
315 | * -1 if decoding error, | |
362a06e3 PG |
316 | * if result is a string, its assumed length |
317 | * is BGP_FLOWSPEC_STRING_DISPLAY_MAX | |
034cdee9 | 318 | */ |
588ec356 | 319 | int bgp_flowspec_bitmask_decode(enum bgp_flowspec_util_nlri_t type, |
034cdee9 PG |
320 | uint8_t *nlri_ptr, |
321 | uint32_t max_len, | |
322 | void *result, int *error) | |
323 | { | |
324 | int op[8]; | |
325 | int len, value_size, loop = 0, value; | |
326 | char *ptr = (char *)result; /* for return_string */ | |
47555ee9 | 327 | struct bgp_pbr_match_val *mval = (struct bgp_pbr_match_val *)result; |
034cdee9 | 328 | uint32_t offset = 0; |
362a06e3 PG |
329 | int len_string = BGP_FLOWSPEC_STRING_DISPLAY_MAX; |
330 | int len_written; | |
034cdee9 PG |
331 | |
332 | *error = 0; | |
333 | do { | |
47555ee9 PG |
334 | if (loop > BGP_PBR_MATCH_VAL_MAX) |
335 | *error = -2; | |
034cdee9 PG |
336 | hex2bin(&nlri_ptr[offset], op); |
337 | /* if first element, AND bit can not be set */ | |
338 | if (op[1] == 1 && loop == 0) | |
339 | *error = -1; | |
340 | offset++; | |
341 | len = 2 * op[2] + op[3]; | |
342 | value_size = 1 << len; | |
343 | value = hexstr2num(&nlri_ptr[offset], value_size); | |
344 | switch (type) { | |
345 | case BGP_FLOWSPEC_RETURN_STRING: | |
362a06e3 PG |
346 | if (op[1] == 1 && loop != 0) { |
347 | len_written = snprintf(ptr, len_string, | |
01ffd28b | 348 | ",&"); |
362a06e3 PG |
349 | len_string -= len_written; |
350 | ptr += len_written; | |
351 | } else if (op[1] == 0 && loop != 0) { | |
352 | len_written = snprintf(ptr, len_string, | |
01ffd28b | 353 | ",|"); |
362a06e3 PG |
354 | len_string -= len_written; |
355 | ptr += len_written; | |
356 | } | |
01ffd28b PG |
357 | if (op[7] == 1) { |
358 | len_written = snprintf(ptr, len_string, | |
359 | "= "); | |
360 | len_string -= len_written; | |
361 | ptr += len_written; | |
362 | } else { | |
363 | len_written = snprintf(ptr, len_string, | |
364 | "∋ "); | |
362a06e3 PG |
365 | len_string -= len_written; |
366 | ptr += len_written; | |
367 | } | |
01ffd28b PG |
368 | if (op[6] == 1) { |
369 | len_written = snprintf(ptr, len_string, | |
370 | "! "); | |
362a06e3 PG |
371 | len_string -= len_written; |
372 | ptr += len_written; | |
373 | } | |
01ffd28b | 374 | len_written = snprintf(ptr, len_string, |
362a06e3 PG |
375 | "%d", value); |
376 | len_string -= len_written; | |
377 | ptr += len_written; | |
034cdee9 PG |
378 | break; |
379 | case BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE: | |
47555ee9 PG |
380 | /* limitation: stop converting */ |
381 | if (*error == -2) | |
382 | break; | |
383 | mval->value = value; | |
384 | if (op[6] == 1) { | |
385 | /* different from */ | |
386 | mval->compare_operator |= | |
387 | OPERATOR_COMPARE_LESS_THAN; | |
388 | mval->compare_operator |= | |
389 | OPERATOR_COMPARE_GREATER_THAN; | |
390 | } else | |
391 | mval->compare_operator |= | |
392 | OPERATOR_COMPARE_EQUAL_TO; | |
393 | if (op[7] == 1) | |
394 | mval->compare_operator |= | |
395 | OPERATOR_COMPARE_EXACT_MATCH; | |
396 | if (op[1] == 1) | |
397 | mval->unary_operator = | |
398 | OPERATOR_UNARY_AND; | |
399 | else | |
400 | mval->unary_operator = | |
401 | OPERATOR_UNARY_OR; | |
402 | mval++; | |
034cdee9 PG |
403 | break; |
404 | case BGP_FLOWSPEC_VALIDATE_ONLY: | |
405 | default: | |
406 | /* no action */ | |
407 | break; | |
408 | } | |
409 | offset += value_size; | |
410 | loop++; | |
411 | } while (op[0] == 0 && offset < max_len - 1); | |
412 | if (offset > max_len) | |
413 | *error = -1; | |
414 | /* use error parameter to count the number of entries */ | |
415 | if (*error == 0) | |
416 | *error = loop; | |
417 | return offset; | |
418 | } | |
419 | ||
47555ee9 PG |
420 | int bgp_flowspec_match_rules_fill(uint8_t *nlri_content, int len, |
421 | struct bgp_pbr_entry_main *bpem) | |
98a9dbc7 | 422 | { |
47555ee9 PG |
423 | int offset = 0, error = 0; |
424 | struct prefix *prefix; | |
425 | struct bgp_pbr_match_val *mval; | |
426 | uint8_t *match_num; | |
427 | uint8_t bitmask = 0; | |
428 | int ret = 0, type; | |
98a9dbc7 | 429 | |
47555ee9 | 430 | while (offset < len - 1 && error >= 0) { |
98a9dbc7 PG |
431 | type = nlri_content[offset]; |
432 | offset++; | |
433 | switch (type) { | |
434 | case FLOWSPEC_DEST_PREFIX: | |
435 | case FLOWSPEC_SRC_PREFIX: | |
47555ee9 PG |
436 | bitmask = 0; |
437 | if (type == FLOWSPEC_DEST_PREFIX) { | |
438 | bitmask |= PREFIX_DST_PRESENT; | |
439 | prefix = &bpem->dst_prefix; | |
440 | } else { | |
441 | bitmask |= PREFIX_SRC_PRESENT; | |
442 | prefix = &bpem->src_prefix; | |
443 | } | |
98a9dbc7 PG |
444 | ret = bgp_flowspec_ip_address( |
445 | BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE, | |
47555ee9 | 446 | nlri_content + offset, |
98a9dbc7 | 447 | len - offset, |
47555ee9 PG |
448 | prefix, &error); |
449 | if (error < 0) | |
af4c2728 | 450 | flog_err(BGP_ERR_FLOWSPEC_PACKET, |
4f3be667 DS |
451 | "%s: flowspec_ip_address error %d", |
452 | __func__, error); | |
47555ee9 PG |
453 | else |
454 | bpem->match_bitmask |= bitmask; | |
455 | offset += ret; | |
98a9dbc7 PG |
456 | break; |
457 | case FLOWSPEC_IP_PROTOCOL: | |
47555ee9 PG |
458 | match_num = &(bpem->match_protocol_num); |
459 | mval = (struct bgp_pbr_match_val *) | |
460 | &(bpem->protocol); | |
461 | offset += bgp_flowspec_call_non_opaque_decode( | |
462 | nlri_content + offset, | |
463 | len - offset, | |
464 | mval, match_num, | |
465 | &error); | |
466 | break; | |
98a9dbc7 | 467 | case FLOWSPEC_PORT: |
47555ee9 PG |
468 | match_num = &(bpem->match_port_num); |
469 | mval = (struct bgp_pbr_match_val *) | |
470 | &(bpem->port); | |
471 | offset += bgp_flowspec_call_non_opaque_decode( | |
472 | nlri_content + offset, | |
473 | len - offset, | |
474 | mval, match_num, | |
475 | &error); | |
476 | break; | |
98a9dbc7 | 477 | case FLOWSPEC_DEST_PORT: |
47555ee9 PG |
478 | match_num = &(bpem->match_dst_port_num); |
479 | mval = (struct bgp_pbr_match_val *) | |
480 | &(bpem->dst_port); | |
481 | offset += bgp_flowspec_call_non_opaque_decode( | |
482 | nlri_content + offset, | |
483 | len - offset, | |
484 | mval, match_num, | |
485 | &error); | |
486 | break; | |
98a9dbc7 | 487 | case FLOWSPEC_SRC_PORT: |
47555ee9 PG |
488 | match_num = &(bpem->match_src_port_num); |
489 | mval = (struct bgp_pbr_match_val *) | |
490 | &(bpem->src_port); | |
491 | offset += bgp_flowspec_call_non_opaque_decode( | |
492 | nlri_content + offset, | |
493 | len - offset, | |
494 | mval, match_num, | |
495 | &error); | |
496 | break; | |
98a9dbc7 | 497 | case FLOWSPEC_ICMP_TYPE: |
47555ee9 PG |
498 | match_num = &(bpem->match_icmp_type_num); |
499 | mval = (struct bgp_pbr_match_val *) | |
500 | &(bpem->icmp_type); | |
501 | offset += bgp_flowspec_call_non_opaque_decode( | |
502 | nlri_content + offset, | |
503 | len - offset, | |
504 | mval, match_num, | |
505 | &error); | |
98a9dbc7 | 506 | break; |
47555ee9 PG |
507 | case FLOWSPEC_ICMP_CODE: |
508 | match_num = &(bpem->match_icmp_code_num); | |
509 | mval = (struct bgp_pbr_match_val *) | |
510 | &(bpem->icmp_code); | |
511 | offset += bgp_flowspec_call_non_opaque_decode( | |
512 | nlri_content + offset, | |
513 | len - offset, | |
514 | mval, match_num, | |
515 | &error); | |
98a9dbc7 PG |
516 | break; |
517 | case FLOWSPEC_PKT_LEN: | |
47555ee9 PG |
518 | match_num = |
519 | &(bpem->match_packet_length_num); | |
520 | mval = (struct bgp_pbr_match_val *) | |
521 | &(bpem->packet_length); | |
522 | offset += bgp_flowspec_call_non_opaque_decode( | |
523 | nlri_content + offset, | |
524 | len - offset, | |
525 | mval, match_num, | |
526 | &error); | |
527 | break; | |
98a9dbc7 | 528 | case FLOWSPEC_DSCP: |
47555ee9 PG |
529 | match_num = &(bpem->match_dscp_num); |
530 | mval = (struct bgp_pbr_match_val *) | |
531 | &(bpem->dscp); | |
532 | offset += bgp_flowspec_call_non_opaque_decode( | |
533 | nlri_content + offset, | |
534 | len - offset, | |
535 | mval, match_num, | |
536 | &error); | |
537 | break; | |
538 | case FLOWSPEC_TCP_FLAGS: | |
588ec356 | 539 | ret = bgp_flowspec_bitmask_decode( |
47555ee9 PG |
540 | BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE, |
541 | nlri_content + offset, | |
542 | len - offset, | |
543 | &bpem->tcpflags, &error); | |
544 | if (error < 0) | |
af4c2728 | 545 | flog_err(BGP_ERR_FLOWSPEC_PACKET, |
4f3be667 DS |
546 | "%s: flowspec_tcpflags_decode error %d", |
547 | __func__, error); | |
47555ee9 PG |
548 | else |
549 | bpem->match_tcpflags_num = error; | |
550 | /* contains the number of slots used */ | |
551 | offset += ret; | |
98a9dbc7 PG |
552 | break; |
553 | case FLOWSPEC_FRAGMENT: | |
588ec356 | 554 | ret = bgp_flowspec_bitmask_decode( |
47555ee9 PG |
555 | BGP_FLOWSPEC_CONVERT_TO_NON_OPAQUE, |
556 | nlri_content + offset, | |
557 | len - offset, &bpem->fragment, | |
558 | &error); | |
559 | if (error < 0) | |
af4c2728 | 560 | flog_err(BGP_ERR_FLOWSPEC_PACKET, |
4f3be667 DS |
561 | "%s: flowspec_fragment_type_decode error %d", |
562 | __func__, error); | |
47555ee9 | 563 | else |
588ec356 | 564 | bpem->match_fragment_num = error; |
47555ee9 | 565 | offset += ret; |
98a9dbc7 PG |
566 | break; |
567 | default: | |
af4c2728 | 568 | flog_err(LIB_ERR_DEVELOPMENT, "%s: unknown type %d\n", |
02705213 | 569 | __func__, type); |
98a9dbc7 | 570 | } |
98a9dbc7 | 571 | } |
47555ee9 | 572 | return error; |
98a9dbc7 | 573 | } |