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