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Commit | Line | Data |
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bbe6ffd6 PG |
1 | /* |
2 | * BGP pbr | |
3 | * Copyright (C) 6WIND | |
4 | * | |
5 | * FRR is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2, or (at your option) any | |
8 | * later version. | |
9 | * | |
10 | * FRR is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | ||
20 | #include "zebra.h" | |
21 | #include "prefix.h" | |
22 | #include "zclient.h" | |
f3d32faa | 23 | #include "jhash.h" |
2e1f721e | 24 | #include "pbr.h" |
bbe6ffd6 | 25 | |
f3d32faa | 26 | #include "bgpd/bgpd.h" |
bbe6ffd6 | 27 | #include "bgpd/bgp_pbr.h" |
b46b6f1a | 28 | #include "bgpd/bgp_debug.h" |
45918cfb PG |
29 | #include "bgpd/bgp_flowspec_util.h" |
30 | #include "bgpd/bgp_ecommunity.h" | |
31 | #include "bgpd/bgp_route.h" | |
32 | #include "bgpd/bgp_attr.h" | |
d114b0d7 | 33 | #include "bgpd/bgp_zebra.h" |
529efa23 | 34 | #include "bgpd/bgp_mplsvpn.h" |
35703998 | 35 | #include "bgpd/bgp_flowspec_private.h" |
d114b0d7 PG |
36 | |
37 | DEFINE_MTYPE_STATIC(BGPD, PBR_MATCH_ENTRY, "PBR match entry") | |
38 | DEFINE_MTYPE_STATIC(BGPD, PBR_MATCH, "PBR match") | |
39 | DEFINE_MTYPE_STATIC(BGPD, PBR_ACTION, "PBR action") | |
4762c213 | 40 | DEFINE_MTYPE_STATIC(BGPD, PBR, "BGP PBR Context") |
f7b2e630 | 41 | DEFINE_MTYPE_STATIC(BGPD, PBR_VALMASK, "BGP PBR Val Mask Value") |
4762c213 PG |
42 | |
43 | RB_GENERATE(bgp_pbr_interface_head, bgp_pbr_interface, | |
44 | id_entry, bgp_pbr_interface_compare); | |
45 | struct bgp_pbr_interface_head ifaces_by_name_ipv4 = | |
46 | RB_INITIALIZER(&ifaces_by_name_ipv4); | |
d114b0d7 PG |
47 | |
48 | static int bgp_pbr_match_counter_unique; | |
49 | static int bgp_pbr_match_entry_counter_unique; | |
50 | static int bgp_pbr_action_counter_unique; | |
51 | static int bgp_pbr_match_iptable_counter_unique; | |
b46b6f1a | 52 | |
1815c6fc PG |
53 | struct bgp_pbr_match_iptable_unique { |
54 | uint32_t unique; | |
55 | struct bgp_pbr_match *bpm_found; | |
56 | }; | |
57 | ||
c5d429e1 PG |
58 | struct bgp_pbr_match_entry_unique { |
59 | uint32_t unique; | |
60 | struct bgp_pbr_match_entry *bpme_found; | |
61 | }; | |
62 | ||
70eabd12 PG |
63 | struct bgp_pbr_action_unique { |
64 | uint32_t unique; | |
65 | struct bgp_pbr_action *bpa_found; | |
66 | }; | |
67 | ||
68 | static int bgp_pbr_action_walkcb(struct hash_backet *backet, void *arg) | |
69 | { | |
70 | struct bgp_pbr_action *bpa = (struct bgp_pbr_action *)backet->data; | |
71 | struct bgp_pbr_action_unique *bpau = (struct bgp_pbr_action_unique *) | |
72 | arg; | |
73 | uint32_t unique = bpau->unique; | |
74 | ||
75 | if (bpa->unique == unique) { | |
76 | bpau->bpa_found = bpa; | |
77 | return HASHWALK_ABORT; | |
78 | } | |
79 | return HASHWALK_CONTINUE; | |
80 | } | |
81 | ||
c5d429e1 PG |
82 | static int bgp_pbr_match_entry_walkcb(struct hash_backet *backet, void *arg) |
83 | { | |
84 | struct bgp_pbr_match_entry *bpme = | |
85 | (struct bgp_pbr_match_entry *)backet->data; | |
86 | struct bgp_pbr_match_entry_unique *bpmeu = | |
87 | (struct bgp_pbr_match_entry_unique *)arg; | |
88 | uint32_t unique = bpmeu->unique; | |
89 | ||
90 | if (bpme->unique == unique) { | |
91 | bpmeu->bpme_found = bpme; | |
92 | return HASHWALK_ABORT; | |
93 | } | |
94 | return HASHWALK_CONTINUE; | |
95 | } | |
96 | ||
97 | struct bgp_pbr_match_ipsetname { | |
98 | char *ipsetname; | |
99 | struct bgp_pbr_match *bpm_found; | |
100 | }; | |
101 | ||
102 | static int bgp_pbr_match_pername_walkcb(struct hash_backet *backet, void *arg) | |
103 | { | |
104 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
105 | struct bgp_pbr_match_ipsetname *bpmi = | |
106 | (struct bgp_pbr_match_ipsetname *)arg; | |
107 | char *ipset_name = bpmi->ipsetname; | |
108 | ||
109 | if (!strncmp(ipset_name, bpm->ipset_name, | |
110 | ZEBRA_IPSET_NAME_SIZE)) { | |
111 | bpmi->bpm_found = bpm; | |
112 | return HASHWALK_ABORT; | |
113 | } | |
114 | return HASHWALK_CONTINUE; | |
115 | } | |
116 | ||
1815c6fc PG |
117 | static int bgp_pbr_match_iptable_walkcb(struct hash_backet *backet, void *arg) |
118 | { | |
119 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
120 | struct bgp_pbr_match_iptable_unique *bpmiu = | |
121 | (struct bgp_pbr_match_iptable_unique *)arg; | |
122 | uint32_t unique = bpmiu->unique; | |
123 | ||
124 | if (bpm->unique2 == unique) { | |
125 | bpmiu->bpm_found = bpm; | |
126 | return HASHWALK_ABORT; | |
127 | } | |
128 | return HASHWALK_CONTINUE; | |
129 | } | |
130 | ||
c5d429e1 PG |
131 | struct bgp_pbr_match_unique { |
132 | uint32_t unique; | |
133 | struct bgp_pbr_match *bpm_found; | |
134 | }; | |
135 | ||
136 | static int bgp_pbr_match_walkcb(struct hash_backet *backet, void *arg) | |
137 | { | |
138 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
139 | struct bgp_pbr_match_unique *bpmu = (struct bgp_pbr_match_unique *) | |
140 | arg; | |
141 | uint32_t unique = bpmu->unique; | |
142 | ||
143 | if (bpm->unique == unique) { | |
144 | bpmu->bpm_found = bpm; | |
145 | return HASHWALK_ABORT; | |
146 | } | |
147 | return HASHWALK_CONTINUE; | |
148 | } | |
149 | ||
b46b6f1a PG |
150 | static int sprintf_bgp_pbr_match_val(char *str, struct bgp_pbr_match_val *mval, |
151 | const char *prepend) | |
152 | { | |
153 | char *ptr = str; | |
154 | ||
155 | if (prepend) | |
156 | ptr += sprintf(ptr, "%s", prepend); | |
157 | else { | |
158 | if (mval->unary_operator & OPERATOR_UNARY_OR) | |
159 | ptr += sprintf(ptr, ", or "); | |
160 | if (mval->unary_operator & OPERATOR_UNARY_AND) | |
161 | ptr += sprintf(ptr, ", and "); | |
162 | } | |
163 | if (mval->compare_operator & OPERATOR_COMPARE_LESS_THAN) | |
164 | ptr += sprintf(ptr, "<"); | |
165 | if (mval->compare_operator & OPERATOR_COMPARE_GREATER_THAN) | |
166 | ptr += sprintf(ptr, ">"); | |
167 | if (mval->compare_operator & OPERATOR_COMPARE_EQUAL_TO) | |
168 | ptr += sprintf(ptr, "="); | |
169 | if (mval->compare_operator & OPERATOR_COMPARE_EXACT_MATCH) | |
170 | ptr += sprintf(ptr, "match"); | |
171 | ptr += sprintf(ptr, " %u", mval->value); | |
172 | return (int)(ptr - str); | |
173 | } | |
174 | ||
175 | #define INCREMENT_DISPLAY(_ptr, _cnt) do { \ | |
176 | if (_cnt) \ | |
177 | (_ptr) += sprintf((_ptr), "; "); \ | |
178 | _cnt++; \ | |
179 | } while (0) | |
180 | ||
0e867886 PG |
181 | /* this structure can be used for port range, |
182 | * but also for other values range like packet length range | |
183 | */ | |
1de7dfff PG |
184 | struct bgp_pbr_range_port { |
185 | uint16_t min_port; | |
186 | uint16_t max_port; | |
187 | }; | |
188 | ||
2da7d62e PG |
189 | /* this structure can be used to filter with a mask |
190 | * for instance it supports not instructions like for | |
191 | * tcpflags | |
192 | */ | |
193 | struct bgp_pbr_val_mask { | |
194 | uint16_t val; | |
195 | uint16_t mask; | |
196 | }; | |
197 | ||
0e867886 PG |
198 | /* this structure is used to pass instructs |
199 | * so that BGP can create pbr instructions to ZEBRA | |
200 | */ | |
201 | struct bgp_pbr_filter { | |
202 | vrf_id_t vrf_id; | |
203 | struct prefix *src; | |
204 | struct prefix *dst; | |
205 | uint8_t protocol; | |
206 | struct bgp_pbr_range_port *pkt_len; | |
207 | struct bgp_pbr_range_port *src_port; | |
208 | struct bgp_pbr_range_port *dst_port; | |
2da7d62e | 209 | struct bgp_pbr_val_mask *tcp_flags; |
4977bd6c | 210 | struct bgp_pbr_val_mask *dscp; |
cfaf18ce | 211 | struct bgp_pbr_val_mask *pkt_len_val; |
6f5617d8 | 212 | struct bgp_pbr_val_mask *fragment; |
0e867886 PG |
213 | }; |
214 | ||
c5ee26cc PG |
215 | /* this structure is used to contain OR instructions |
216 | * so that BGP can create multiple pbr instructions | |
217 | * to ZEBRA | |
218 | */ | |
219 | struct bgp_pbr_or_filter { | |
220 | struct list *tcpflags; | |
56707a36 | 221 | struct list *dscp; |
cfaf18ce | 222 | struct list *pkt_len; |
6f5617d8 | 223 | struct list *fragment; |
da3fa383 PG |
224 | struct list *icmp_type; |
225 | struct list *icmp_code; | |
c5ee26cc PG |
226 | }; |
227 | ||
da3fa383 PG |
228 | static void bgp_pbr_policyroute_add_to_zebra_unit(struct bgp *bgp, |
229 | struct bgp_info *binfo, | |
230 | struct bgp_pbr_filter *bpf, | |
231 | struct nexthop *nh, | |
232 | float *rate); | |
6e288819 PG |
233 | |
234 | static bool bgp_pbr_extract_enumerate_unary_opposite( | |
235 | uint8_t unary_operator, | |
236 | struct bgp_pbr_val_mask *and_valmask, | |
237 | struct list *or_valmask, uint32_t value, | |
238 | uint8_t type_entry) | |
239 | { | |
240 | if (unary_operator == OPERATOR_UNARY_AND && and_valmask) { | |
241 | if (type_entry == FLOWSPEC_TCP_FLAGS) { | |
242 | and_valmask->mask |= | |
243 | TCP_HEADER_ALL_FLAGS & | |
244 | ~(value); | |
245 | } else if (type_entry == FLOWSPEC_DSCP || | |
246 | type_entry == FLOWSPEC_PKT_LEN || | |
247 | type_entry == FLOWSPEC_FRAGMENT) { | |
248 | and_valmask->val = value; | |
249 | and_valmask->mask = 1; /* inverse */ | |
250 | } | |
251 | } else if (unary_operator == OPERATOR_UNARY_OR && or_valmask) { | |
252 | and_valmask = XCALLOC(MTYPE_PBR_VALMASK, | |
253 | sizeof(struct bgp_pbr_val_mask)); | |
254 | if (type_entry == FLOWSPEC_TCP_FLAGS) { | |
255 | and_valmask->val = TCP_HEADER_ALL_FLAGS; | |
256 | and_valmask->mask |= | |
257 | TCP_HEADER_ALL_FLAGS & | |
258 | ~(value); | |
259 | } else if (type_entry == FLOWSPEC_DSCP || | |
260 | type_entry == FLOWSPEC_FRAGMENT || | |
261 | type_entry == FLOWSPEC_PKT_LEN) { | |
262 | and_valmask->val = value; | |
263 | and_valmask->mask = 1; /* inverse */ | |
264 | } | |
265 | listnode_add(or_valmask, and_valmask); | |
266 | } else if (type_entry == FLOWSPEC_ICMP_CODE || | |
267 | type_entry == FLOWSPEC_ICMP_TYPE) | |
268 | return false; | |
269 | return true; | |
270 | } | |
271 | ||
2da7d62e PG |
272 | /* TCP : FIN and SYN -> val = ALL; mask = 3 |
273 | * TCP : not (FIN and SYN) -> val = ALL; mask = ALL & ~(FIN|RST) | |
6f5617d8 PG |
274 | * other variables type: dscp, pkt len, fragment |
275 | * - value is copied in bgp_pbr_val_mask->val value | |
276 | * - if negate form is identifierd, bgp_pbr_val_mask->mask set to 1 | |
2da7d62e | 277 | */ |
f7b2e630 PG |
278 | static bool bgp_pbr_extract_enumerate_unary(struct bgp_pbr_match_val list[], |
279 | int num, uint8_t unary_operator, | |
35703998 | 280 | void *valmask, uint8_t type_entry) |
932404b7 PG |
281 | { |
282 | int i = 0; | |
f7b2e630 PG |
283 | struct bgp_pbr_val_mask *and_valmask = NULL; |
284 | struct list *or_valmask = NULL; | |
6e288819 | 285 | bool ret; |
932404b7 | 286 | |
f7b2e630 PG |
287 | if (valmask) { |
288 | if (unary_operator == OPERATOR_UNARY_AND) { | |
289 | and_valmask = (struct bgp_pbr_val_mask *)valmask; | |
290 | memset(and_valmask, 0, sizeof(struct bgp_pbr_val_mask)); | |
291 | } else if (unary_operator == OPERATOR_UNARY_OR) { | |
292 | or_valmask = (struct list *)valmask; | |
293 | } | |
294 | } | |
932404b7 | 295 | for (i = 0; i < num; i++) { |
2da7d62e PG |
296 | if (i != 0 && list[i].unary_operator != |
297 | unary_operator) | |
932404b7 | 298 | return false; |
2da7d62e PG |
299 | if (!(list[i].compare_operator & |
300 | OPERATOR_COMPARE_EQUAL_TO) && | |
301 | !(list[i].compare_operator & | |
302 | OPERATOR_COMPARE_EXACT_MATCH)) { | |
303 | if ((list[i].compare_operator & | |
304 | OPERATOR_COMPARE_LESS_THAN) && | |
305 | (list[i].compare_operator & | |
306 | OPERATOR_COMPARE_GREATER_THAN)) { | |
6e288819 PG |
307 | ret = bgp_pbr_extract_enumerate_unary_opposite( |
308 | unary_operator, and_valmask, | |
309 | or_valmask, list[i].value, | |
310 | type_entry); | |
311 | if (ret == false) | |
312 | return ret; | |
2da7d62e PG |
313 | continue; |
314 | } | |
315 | return false; | |
316 | } | |
35703998 PG |
317 | if (unary_operator == OPERATOR_UNARY_AND && and_valmask) { |
318 | if (type_entry == FLOWSPEC_TCP_FLAGS) | |
319 | and_valmask->mask |= | |
320 | TCP_HEADER_ALL_FLAGS & list[i].value; | |
321 | } else if (unary_operator == OPERATOR_UNARY_OR && or_valmask) { | |
f7b2e630 PG |
322 | and_valmask = XCALLOC(MTYPE_PBR_VALMASK, |
323 | sizeof(struct bgp_pbr_val_mask)); | |
35703998 PG |
324 | if (type_entry == FLOWSPEC_TCP_FLAGS) { |
325 | and_valmask->val = TCP_HEADER_ALL_FLAGS; | |
326 | and_valmask->mask |= | |
327 | TCP_HEADER_ALL_FLAGS & list[i].value; | |
cfaf18ce | 328 | } else if (type_entry == FLOWSPEC_DSCP || |
da3fa383 PG |
329 | type_entry == FLOWSPEC_ICMP_TYPE || |
330 | type_entry == FLOWSPEC_ICMP_CODE || | |
6f5617d8 | 331 | type_entry == FLOWSPEC_FRAGMENT || |
cfaf18ce | 332 | type_entry == FLOWSPEC_PKT_LEN) |
35703998 | 333 | and_valmask->val = list[i].value; |
f7b2e630 PG |
334 | listnode_add(or_valmask, and_valmask); |
335 | } | |
932404b7 | 336 | } |
35703998 PG |
337 | if (unary_operator == OPERATOR_UNARY_AND && and_valmask |
338 | && type_entry == FLOWSPEC_TCP_FLAGS) | |
339 | and_valmask->val = TCP_HEADER_ALL_FLAGS; | |
932404b7 PG |
340 | return true; |
341 | } | |
342 | ||
f7b2e630 PG |
343 | /* if unary operator can either be UNARY_OR/AND/OR-AND. |
344 | * in the latter case, combinationf of both is not handled | |
345 | */ | |
346 | static bool bgp_pbr_extract_enumerate(struct bgp_pbr_match_val list[], | |
347 | int num, uint8_t unary_operator, | |
35703998 | 348 | void *valmask, uint8_t type_entry) |
f7b2e630 PG |
349 | { |
350 | bool ret; | |
35703998 | 351 | uint8_t unary_operator_val = unary_operator; |
f7b2e630 PG |
352 | bool double_check = false; |
353 | ||
354 | if ((unary_operator & OPERATOR_UNARY_OR) && | |
355 | (unary_operator & OPERATOR_UNARY_AND)) { | |
356 | unary_operator_val = OPERATOR_UNARY_AND; | |
357 | double_check = true; | |
358 | } else | |
359 | unary_operator_val = unary_operator; | |
360 | ret = bgp_pbr_extract_enumerate_unary(list, num, unary_operator_val, | |
35703998 | 361 | valmask, type_entry); |
f7b2e630 PG |
362 | if (!ret && double_check) |
363 | ret = bgp_pbr_extract_enumerate_unary(list, num, | |
364 | OPERATOR_UNARY_OR, | |
35703998 PG |
365 | valmask, |
366 | type_entry); | |
f7b2e630 PG |
367 | return ret; |
368 | } | |
369 | ||
370 | /* returns the unary operator that is in the list | |
371 | * return 0 if both operators are used | |
372 | */ | |
373 | static uint8_t bgp_pbr_match_val_get_operator(struct bgp_pbr_match_val list[], | |
374 | int num) | |
375 | ||
376 | { | |
377 | int i; | |
378 | uint8_t unary_operator = OPERATOR_UNARY_AND; | |
379 | ||
380 | for (i = 0; i < num; i++) { | |
381 | if (i == 0) | |
382 | continue; | |
383 | if (list[i].unary_operator & OPERATOR_UNARY_OR) | |
384 | unary_operator = OPERATOR_UNARY_OR; | |
385 | if ((list[i].unary_operator & OPERATOR_UNARY_AND | |
386 | && unary_operator == OPERATOR_UNARY_OR) || | |
387 | (list[i].unary_operator & OPERATOR_UNARY_OR | |
388 | && unary_operator == OPERATOR_UNARY_AND)) | |
389 | return 0; | |
390 | } | |
391 | return unary_operator; | |
392 | } | |
393 | ||
394 | ||
1de7dfff PG |
395 | /* return true if extraction ok |
396 | */ | |
397 | static bool bgp_pbr_extract(struct bgp_pbr_match_val list[], | |
398 | int num, | |
399 | struct bgp_pbr_range_port *range) | |
400 | { | |
401 | int i = 0; | |
402 | bool exact_match = false; | |
403 | ||
404 | if (range) | |
405 | memset(range, 0, sizeof(struct bgp_pbr_range_port)); | |
406 | ||
407 | if (num > 2) | |
408 | return false; | |
409 | for (i = 0; i < num; i++) { | |
410 | if (i != 0 && (list[i].compare_operator == | |
411 | OPERATOR_COMPARE_EQUAL_TO)) | |
412 | return false; | |
413 | if (i == 0 && (list[i].compare_operator == | |
414 | OPERATOR_COMPARE_EQUAL_TO)) { | |
415 | if (range) | |
416 | range->min_port = list[i].value; | |
417 | exact_match = true; | |
418 | } | |
419 | if (exact_match == true && i > 0) | |
420 | return false; | |
421 | if (list[i].compare_operator == | |
422 | (OPERATOR_COMPARE_GREATER_THAN + | |
423 | OPERATOR_COMPARE_EQUAL_TO)) { | |
424 | if (range) | |
425 | range->min_port = list[i].value; | |
426 | } else if (list[i].compare_operator == | |
427 | (OPERATOR_COMPARE_LESS_THAN + | |
428 | OPERATOR_COMPARE_EQUAL_TO)) { | |
429 | if (range) | |
430 | range->max_port = list[i].value; | |
431 | } else if (list[i].compare_operator == | |
432 | OPERATOR_COMPARE_LESS_THAN) { | |
433 | if (range) | |
434 | range->max_port = list[i].value - 1; | |
435 | } else if (list[i].compare_operator == | |
436 | OPERATOR_COMPARE_GREATER_THAN) { | |
437 | if (range) | |
438 | range->min_port = list[i].value + 1; | |
439 | } | |
440 | } | |
441 | return true; | |
442 | } | |
443 | ||
b46b6f1a PG |
444 | static int bgp_pbr_validate_policy_route(struct bgp_pbr_entry_main *api) |
445 | { | |
932404b7 PG |
446 | bool enumerate_icmp = false; |
447 | ||
b46b6f1a PG |
448 | /* because bgp pbr entry may contain unsupported |
449 | * combinations, a message will be displayed here if | |
450 | * not supported. | |
451 | * for now, only match/set supported is | |
452 | * - combination src/dst => redirect nexthop [ + rate] | |
453 | * - combination src/dst => redirect VRF [ + rate] | |
454 | * - combination src/dst => drop | |
1de7dfff | 455 | * - combination srcport + @IP |
b46b6f1a | 456 | */ |
1de7dfff PG |
457 | if (api->match_protocol_num > 1) { |
458 | if (BGP_DEBUG(pbr, PBR)) | |
459 | zlog_debug("BGP: match protocol operations:" | |
460 | "multiple protocols ( %d). ignoring.", | |
461 | api->match_protocol_num); | |
462 | return 0; | |
463 | } | |
464 | if (api->match_protocol_num == 1 && | |
465 | api->protocol[0].value != PROTOCOL_UDP && | |
932404b7 | 466 | api->protocol[0].value != PROTOCOL_ICMP && |
1de7dfff PG |
467 | api->protocol[0].value != PROTOCOL_TCP) { |
468 | if (BGP_DEBUG(pbr, PBR)) | |
469 | zlog_debug("BGP: match protocol operations:" | |
470 | "protocol (%d) not supported. ignoring", | |
471 | api->match_protocol_num); | |
472 | return 0; | |
473 | } | |
474 | if (!bgp_pbr_extract(api->src_port, api->match_src_port_num, NULL)) { | |
475 | if (BGP_DEBUG(pbr, PBR)) | |
476 | zlog_debug("BGP: match src port operations:" | |
477 | "too complex. ignoring."); | |
478 | return 0; | |
479 | } | |
480 | if (!bgp_pbr_extract(api->dst_port, api->match_dst_port_num, NULL)) { | |
481 | if (BGP_DEBUG(pbr, PBR)) | |
482 | zlog_debug("BGP: match dst port operations:" | |
483 | "too complex. ignoring."); | |
484 | return 0; | |
485 | } | |
2da7d62e PG |
486 | if (!bgp_pbr_extract_enumerate(api->tcpflags, |
487 | api->match_tcpflags_num, | |
c5ee26cc | 488 | OPERATOR_UNARY_AND | |
35703998 PG |
489 | OPERATOR_UNARY_OR, NULL, |
490 | FLOWSPEC_TCP_FLAGS)) { | |
2da7d62e PG |
491 | if (BGP_DEBUG(pbr, PBR)) |
492 | zlog_debug("BGP: match tcp flags:" | |
493 | "too complex. ignoring."); | |
494 | return 0; | |
495 | } | |
932404b7 PG |
496 | if (!bgp_pbr_extract(api->icmp_type, api->match_icmp_type_num, NULL)) { |
497 | if (!bgp_pbr_extract_enumerate(api->icmp_type, | |
2da7d62e | 498 | api->match_icmp_type_num, |
35703998 PG |
499 | OPERATOR_UNARY_OR, NULL, |
500 | FLOWSPEC_ICMP_TYPE)) { | |
932404b7 PG |
501 | if (BGP_DEBUG(pbr, PBR)) |
502 | zlog_debug("BGP: match icmp type operations:" | |
503 | "too complex. ignoring."); | |
504 | return 0; | |
505 | } | |
506 | enumerate_icmp = true; | |
507 | } | |
508 | if (!bgp_pbr_extract(api->icmp_code, api->match_icmp_code_num, NULL)) { | |
509 | if (!bgp_pbr_extract_enumerate(api->icmp_code, | |
2da7d62e | 510 | api->match_icmp_code_num, |
35703998 PG |
511 | OPERATOR_UNARY_OR, NULL, |
512 | FLOWSPEC_ICMP_CODE)) { | |
932404b7 PG |
513 | if (BGP_DEBUG(pbr, PBR)) |
514 | zlog_debug("BGP: match icmp code operations:" | |
515 | "too complex. ignoring."); | |
516 | return 0; | |
517 | } else if (api->match_icmp_type_num > 1 && | |
518 | enumerate_icmp == false) { | |
519 | if (BGP_DEBUG(pbr, PBR)) | |
520 | zlog_debug("BGP: match icmp code is enumerate" | |
521 | ", and icmp type is not." | |
522 | " too complex. ignoring."); | |
523 | return 0; | |
524 | } | |
525 | } | |
1de7dfff PG |
526 | if (!bgp_pbr_extract(api->port, api->match_port_num, NULL)) { |
527 | if (BGP_DEBUG(pbr, PBR)) | |
528 | zlog_debug("BGP: match port operations:" | |
529 | "too complex. ignoring."); | |
530 | return 0; | |
531 | } | |
cfaf18ce PG |
532 | if (api->match_packet_length_num) { |
533 | bool ret; | |
534 | ||
535 | ret = bgp_pbr_extract(api->packet_length, | |
536 | api->match_packet_length_num, NULL); | |
537 | if (!ret) | |
538 | ret = bgp_pbr_extract_enumerate(api->packet_length, | |
539 | api->match_packet_length_num, | |
540 | OPERATOR_UNARY_OR | |
541 | | OPERATOR_UNARY_AND, | |
542 | NULL, FLOWSPEC_PKT_LEN); | |
543 | if (!ret) { | |
544 | if (BGP_DEBUG(pbr, PBR)) | |
545 | zlog_debug("BGP: match packet length operations:" | |
83360720 | 546 | "too complex. ignoring."); |
cfaf18ce PG |
547 | return 0; |
548 | } | |
83360720 | 549 | } |
35703998 PG |
550 | if (api->match_dscp_num) { |
551 | if (!bgp_pbr_extract_enumerate(api->dscp, api->match_dscp_num, | |
552 | OPERATOR_UNARY_OR | OPERATOR_UNARY_AND, | |
553 | NULL, FLOWSPEC_DSCP)) { | |
554 | if (BGP_DEBUG(pbr, PBR)) | |
555 | zlog_debug("BGP: match DSCP operations:" | |
556 | "too complex. ignoring."); | |
557 | return 0; | |
558 | } | |
4977bd6c | 559 | } |
6f5617d8 PG |
560 | if (api->match_fragment_num) { |
561 | char fail_str[64]; | |
562 | bool success; | |
563 | ||
564 | success = bgp_pbr_extract_enumerate(api->fragment, | |
565 | api->match_fragment_num, | |
566 | OPERATOR_UNARY_OR | |
567 | | OPERATOR_UNARY_AND, | |
568 | NULL, FLOWSPEC_FRAGMENT); | |
569 | if (success) { | |
570 | int i; | |
571 | ||
572 | for (i = 0; i < api->match_fragment_num; i++) { | |
573 | if (api->fragment[i].value != 1 && | |
574 | api->fragment[i].value != 2 && | |
575 | api->fragment[i].value != 4 && | |
576 | api->fragment[i].value != 8) { | |
577 | success = false; | |
578 | sprintf(fail_str, | |
579 | "Value not valid (%d) for this implementation", | |
580 | api->fragment[i].value); | |
581 | } | |
582 | } | |
583 | } else | |
584 | sprintf(fail_str, "too complex. ignoring"); | |
585 | if (!success) { | |
586 | if (BGP_DEBUG(pbr, PBR)) | |
587 | zlog_debug("BGP: match fragment operation (%d) %s", | |
588 | api->match_fragment_num, | |
589 | fail_str); | |
590 | return 0; | |
591 | } | |
592 | } | |
593 | ||
1de7dfff PG |
594 | /* no combinations with both src_port and dst_port |
595 | * or port with src_port and dst_port | |
596 | */ | |
597 | if (api->match_src_port_num + api->match_dst_port_num + | |
598 | api->match_port_num > 3) { | |
599 | if (BGP_DEBUG(pbr, PBR)) | |
600 | zlog_debug("BGP: match multiple port operations:" | |
601 | " too complex. ignoring."); | |
602 | return 0; | |
603 | } | |
932404b7 PG |
604 | if ((api->match_src_port_num || api->match_dst_port_num |
605 | || api->match_port_num) && (api->match_icmp_type_num | |
606 | || api->match_icmp_code_num)) { | |
607 | if (BGP_DEBUG(pbr, PBR)) | |
608 | zlog_debug("BGP: match multiple port/imcp operations:" | |
609 | " too complex. ignoring."); | |
610 | return 0; | |
611 | } | |
b46b6f1a PG |
612 | if (!(api->match_bitmask & PREFIX_SRC_PRESENT) && |
613 | !(api->match_bitmask & PREFIX_DST_PRESENT)) { | |
ac7c35f8 | 614 | if (BGP_DEBUG(pbr, PBR)) { |
b46b6f1a | 615 | bgp_pbr_print_policy_route(api); |
ac7c35f8 PG |
616 | zlog_debug("BGP: match actions without src" |
617 | " or dst address can not operate." | |
618 | " ignoring."); | |
619 | } | |
b46b6f1a PG |
620 | return 0; |
621 | } | |
622 | return 1; | |
623 | } | |
bbe6ffd6 | 624 | |
45918cfb PG |
625 | /* return -1 if build or validation failed */ |
626 | static int bgp_pbr_build_and_validate_entry(struct prefix *p, | |
627 | struct bgp_info *info, | |
628 | struct bgp_pbr_entry_main *api) | |
629 | { | |
630 | int ret; | |
631 | int i, action_count = 0; | |
632 | struct ecommunity *ecom; | |
633 | struct ecommunity_val *ecom_eval; | |
634 | struct bgp_pbr_entry_action *api_action; | |
635 | struct prefix *src = NULL, *dst = NULL; | |
636 | int valid_prefix = 0; | |
637 | afi_t afi = AFI_IP; | |
638 | ||
639 | /* extract match from flowspec entries */ | |
640 | ret = bgp_flowspec_match_rules_fill((uint8_t *)p->u.prefix_flowspec.ptr, | |
641 | p->u.prefix_flowspec.prefixlen, api); | |
642 | if (ret < 0) | |
643 | return -1; | |
644 | /* extract actiosn from flowspec ecom list */ | |
645 | if (info && info->attr && info->attr->ecommunity) { | |
646 | ecom = info->attr->ecommunity; | |
647 | for (i = 0; i < ecom->size; i++) { | |
648 | ecom_eval = (struct ecommunity_val *) | |
149d272b PG |
649 | (ecom->val + (i * ECOMMUNITY_SIZE)); |
650 | action_count++; | |
45918cfb | 651 | if (action_count > ACTIONS_MAX_NUM) { |
f146bb54 PG |
652 | if (BGP_DEBUG(pbr, PBR_ERROR)) |
653 | zlog_err("%s: flowspec actions exceeds limit (max %u)", | |
654 | __func__, action_count); | |
45918cfb PG |
655 | break; |
656 | } | |
149d272b | 657 | api_action = &api->actions[action_count - 1]; |
45918cfb PG |
658 | |
659 | if ((ecom_eval->val[1] == | |
660 | (char)ECOMMUNITY_REDIRECT_VRF) && | |
661 | (ecom_eval->val[0] == | |
662 | (char)ECOMMUNITY_ENCODE_TRANS_EXP || | |
663 | ecom_eval->val[0] == | |
664 | (char)ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 || | |
665 | ecom_eval->val[0] == | |
666 | (char)ECOMMUNITY_EXTENDED_COMMUNITY_PART_3)) { | |
667 | struct ecommunity *eckey = ecommunity_new(); | |
668 | struct ecommunity_val ecom_copy; | |
669 | ||
670 | memcpy(&ecom_copy, ecom_eval, | |
671 | sizeof(struct ecommunity_val)); | |
672 | ecom_copy.val[0] &= | |
673 | ~ECOMMUNITY_ENCODE_TRANS_EXP; | |
674 | ecom_copy.val[1] = ECOMMUNITY_ROUTE_TARGET; | |
675 | ecommunity_add_val(eckey, &ecom_copy); | |
676 | ||
677 | api_action->action = ACTION_REDIRECT; | |
678 | api_action->u.redirect_vrf = | |
679 | get_first_vrf_for_redirect_with_rt( | |
680 | eckey); | |
681 | ecommunity_free(&eckey); | |
682 | } else if ((ecom_eval->val[0] == | |
683 | (char)ECOMMUNITY_ENCODE_REDIRECT_IP_NH) && | |
684 | (ecom_eval->val[1] == | |
685 | (char)ECOMMUNITY_REDIRECT_IP_NH)) { | |
686 | api_action->action = ACTION_REDIRECT_IP; | |
687 | api_action->u.zr.redirect_ip_v4.s_addr = | |
688 | info->attr->nexthop.s_addr; | |
689 | api_action->u.zr.duplicate = ecom_eval->val[7]; | |
690 | } else { | |
691 | if (ecom_eval->val[0] != | |
692 | (char)ECOMMUNITY_ENCODE_TRANS_EXP) | |
693 | continue; | |
694 | ret = ecommunity_fill_pbr_action(ecom_eval, | |
695 | api_action); | |
696 | if (ret != 0) | |
697 | continue; | |
698 | } | |
699 | api->action_num++; | |
700 | } | |
701 | } | |
702 | ||
703 | /* validate if incoming matc/action is compatible | |
704 | * with our policy routing engine | |
705 | */ | |
706 | if (!bgp_pbr_validate_policy_route(api)) | |
707 | return -1; | |
708 | ||
709 | /* check inconsistency in the match rule */ | |
710 | if (api->match_bitmask & PREFIX_SRC_PRESENT) { | |
711 | src = &api->src_prefix; | |
712 | afi = family2afi(src->family); | |
713 | valid_prefix = 1; | |
714 | } | |
715 | if (api->match_bitmask & PREFIX_DST_PRESENT) { | |
716 | dst = &api->dst_prefix; | |
717 | if (valid_prefix && afi != family2afi(dst->family)) { | |
ac7c35f8 | 718 | if (BGP_DEBUG(pbr, PBR)) { |
45918cfb | 719 | bgp_pbr_print_policy_route(api); |
ac7c35f8 PG |
720 | zlog_debug("%s: inconsistency:" |
721 | " no match for afi src and dst (%u/%u)", | |
722 | __func__, afi, family2afi(dst->family)); | |
723 | } | |
45918cfb PG |
724 | return -1; |
725 | } | |
726 | } | |
727 | return 0; | |
728 | } | |
729 | ||
a6b07429 PG |
730 | static void bgp_pbr_match_entry_free(void *arg) |
731 | { | |
732 | struct bgp_pbr_match_entry *bpme; | |
733 | ||
734 | bpme = (struct bgp_pbr_match_entry *)arg; | |
735 | ||
736 | if (bpme->installed) { | |
737 | bgp_send_pbr_ipset_entry_match(bpme, false); | |
738 | bpme->installed = false; | |
739 | bpme->backpointer = NULL; | |
740 | } | |
741 | XFREE(MTYPE_PBR_MATCH_ENTRY, bpme); | |
742 | } | |
743 | ||
744 | static void bgp_pbr_match_free(void *arg) | |
745 | { | |
746 | struct bgp_pbr_match *bpm; | |
747 | ||
748 | bpm = (struct bgp_pbr_match *)arg; | |
749 | ||
750 | hash_clean(bpm->entry_hash, bgp_pbr_match_entry_free); | |
751 | ||
752 | if (hashcount(bpm->entry_hash) == 0) { | |
753 | /* delete iptable entry first */ | |
754 | /* then delete ipset match */ | |
755 | if (bpm->installed) { | |
756 | if (bpm->installed_in_iptable) { | |
757 | bgp_send_pbr_iptable(bpm->action, | |
758 | bpm, false); | |
759 | bpm->installed_in_iptable = false; | |
760 | bpm->action->refcnt--; | |
761 | } | |
762 | bgp_send_pbr_ipset_match(bpm, false); | |
763 | bpm->installed = false; | |
764 | bpm->action = NULL; | |
765 | } | |
766 | } | |
767 | hash_free(bpm->entry_hash); | |
768 | ||
769 | XFREE(MTYPE_PBR_MATCH, bpm); | |
770 | } | |
771 | ||
d114b0d7 PG |
772 | static void *bgp_pbr_match_alloc_intern(void *arg) |
773 | { | |
774 | struct bgp_pbr_match *bpm, *new; | |
775 | ||
776 | bpm = (struct bgp_pbr_match *)arg; | |
777 | ||
778 | new = XCALLOC(MTYPE_PBR_MATCH, sizeof(*new)); | |
779 | memcpy(new, bpm, sizeof(*bpm)); | |
780 | ||
781 | return new; | |
782 | } | |
783 | ||
a6b07429 PG |
784 | static void bgp_pbr_action_free(void *arg) |
785 | { | |
786 | struct bgp_pbr_action *bpa; | |
787 | ||
788 | bpa = (struct bgp_pbr_action *)arg; | |
789 | ||
790 | if (bpa->refcnt == 0) { | |
791 | if (bpa->installed && bpa->table_id != 0) { | |
792 | bgp_send_pbr_rule_action(bpa, false); | |
793 | bgp_zebra_announce_default(bpa->bgp, &(bpa->nh), | |
794 | AFI_IP, | |
795 | bpa->table_id, | |
796 | false); | |
6ee20355 | 797 | bpa->installed = false; |
a6b07429 PG |
798 | } |
799 | } | |
800 | XFREE(MTYPE_PBR_ACTION, bpa); | |
801 | } | |
802 | ||
d114b0d7 PG |
803 | static void *bgp_pbr_action_alloc_intern(void *arg) |
804 | { | |
805 | struct bgp_pbr_action *bpa, *new; | |
806 | ||
807 | bpa = (struct bgp_pbr_action *)arg; | |
808 | ||
809 | new = XCALLOC(MTYPE_PBR_ACTION, sizeof(*new)); | |
810 | ||
811 | memcpy(new, bpa, sizeof(*bpa)); | |
812 | ||
813 | return new; | |
814 | } | |
815 | ||
816 | static void *bgp_pbr_match_entry_alloc_intern(void *arg) | |
817 | { | |
818 | struct bgp_pbr_match_entry *bpme, *new; | |
819 | ||
820 | bpme = (struct bgp_pbr_match_entry *)arg; | |
821 | ||
822 | new = XCALLOC(MTYPE_PBR_MATCH_ENTRY, sizeof(*new)); | |
823 | ||
824 | memcpy(new, bpme, sizeof(*bpme)); | |
825 | ||
826 | return new; | |
827 | } | |
828 | ||
f3d32faa PG |
829 | uint32_t bgp_pbr_match_hash_key(void *arg) |
830 | { | |
831 | struct bgp_pbr_match *pbm = (struct bgp_pbr_match *)arg; | |
832 | uint32_t key; | |
833 | ||
834 | key = jhash_1word(pbm->vrf_id, 0x4312abde); | |
835 | key = jhash_1word(pbm->flags, key); | |
83360720 PG |
836 | key = jhash_1word(pbm->pkt_len_min, key); |
837 | key = jhash_1word(pbm->pkt_len_max, key); | |
2da7d62e PG |
838 | key = jhash_1word(pbm->tcp_flags, key); |
839 | key = jhash_1word(pbm->tcp_mask_flags, key); | |
4977bd6c | 840 | key = jhash_1word(pbm->dscp_value, key); |
6f5617d8 | 841 | key = jhash_1word(pbm->fragment, key); |
f3d32faa PG |
842 | return jhash_1word(pbm->type, key); |
843 | } | |
844 | ||
845 | int bgp_pbr_match_hash_equal(const void *arg1, const void *arg2) | |
846 | { | |
847 | const struct bgp_pbr_match *r1, *r2; | |
848 | ||
849 | r1 = (const struct bgp_pbr_match *)arg1; | |
850 | r2 = (const struct bgp_pbr_match *)arg2; | |
851 | ||
852 | if (r1->vrf_id != r2->vrf_id) | |
853 | return 0; | |
854 | ||
855 | if (r1->type != r2->type) | |
856 | return 0; | |
857 | ||
858 | if (r1->flags != r2->flags) | |
859 | return 0; | |
860 | ||
861 | if (r1->action != r2->action) | |
862 | return 0; | |
863 | ||
83360720 PG |
864 | if (r1->pkt_len_min != r2->pkt_len_min) |
865 | return 0; | |
866 | ||
867 | if (r1->pkt_len_max != r2->pkt_len_max) | |
868 | return 0; | |
869 | ||
2da7d62e PG |
870 | if (r1->tcp_flags != r2->tcp_flags) |
871 | return 0; | |
872 | ||
873 | if (r1->tcp_mask_flags != r2->tcp_mask_flags) | |
874 | return 0; | |
875 | ||
4977bd6c PG |
876 | if (r1->dscp_value != r2->dscp_value) |
877 | return 0; | |
6f5617d8 PG |
878 | |
879 | if (r1->fragment != r2->fragment) | |
880 | return 0; | |
f3d32faa PG |
881 | return 1; |
882 | } | |
883 | ||
884 | uint32_t bgp_pbr_match_entry_hash_key(void *arg) | |
885 | { | |
886 | struct bgp_pbr_match_entry *pbme; | |
887 | uint32_t key; | |
888 | ||
889 | pbme = (struct bgp_pbr_match_entry *)arg; | |
890 | key = prefix_hash_key(&pbme->src); | |
891 | key = jhash_1word(prefix_hash_key(&pbme->dst), key); | |
1de7dfff PG |
892 | key = jhash(&pbme->dst_port_min, 2, key); |
893 | key = jhash(&pbme->src_port_min, 2, key); | |
894 | key = jhash(&pbme->dst_port_max, 2, key); | |
895 | key = jhash(&pbme->src_port_max, 2, key); | |
896 | key = jhash(&pbme->proto, 1, key); | |
f3d32faa PG |
897 | |
898 | return key; | |
899 | } | |
900 | ||
901 | int bgp_pbr_match_entry_hash_equal(const void *arg1, const void *arg2) | |
902 | { | |
903 | const struct bgp_pbr_match_entry *r1, *r2; | |
904 | ||
905 | r1 = (const struct bgp_pbr_match_entry *)arg1; | |
906 | r2 = (const struct bgp_pbr_match_entry *)arg2; | |
907 | ||
908 | /* on updates, comparing | |
909 | * backpointer is not necessary | |
910 | */ | |
911 | ||
912 | /* unique value is self calculated | |
913 | */ | |
914 | ||
915 | /* rate is ignored for now | |
916 | */ | |
917 | ||
918 | if (!prefix_same(&r1->src, &r2->src)) | |
919 | return 0; | |
920 | ||
921 | if (!prefix_same(&r1->dst, &r2->dst)) | |
922 | return 0; | |
923 | ||
1de7dfff PG |
924 | if (r1->src_port_min != r2->src_port_min) |
925 | return 0; | |
926 | ||
927 | if (r1->dst_port_min != r2->dst_port_min) | |
928 | return 0; | |
929 | ||
930 | if (r1->src_port_max != r2->src_port_max) | |
931 | return 0; | |
932 | ||
933 | if (r1->dst_port_max != r2->dst_port_max) | |
934 | return 0; | |
935 | ||
936 | if (r1->proto != r2->proto) | |
937 | return 0; | |
938 | ||
f3d32faa PG |
939 | return 1; |
940 | } | |
941 | ||
942 | uint32_t bgp_pbr_action_hash_key(void *arg) | |
943 | { | |
944 | struct bgp_pbr_action *pbra; | |
945 | uint32_t key; | |
946 | ||
947 | pbra = (struct bgp_pbr_action *)arg; | |
948 | key = jhash_1word(pbra->table_id, 0x4312abde); | |
949 | key = jhash_1word(pbra->fwmark, key); | |
950 | return key; | |
951 | } | |
952 | ||
953 | int bgp_pbr_action_hash_equal(const void *arg1, const void *arg2) | |
954 | { | |
955 | const struct bgp_pbr_action *r1, *r2; | |
956 | ||
957 | r1 = (const struct bgp_pbr_action *)arg1; | |
958 | r2 = (const struct bgp_pbr_action *)arg2; | |
959 | ||
960 | /* unique value is self calculated | |
961 | * table and fwmark is self calculated | |
e414819e | 962 | * rate is ignored |
f3d32faa | 963 | */ |
f3d32faa PG |
964 | if (r1->vrf_id != r2->vrf_id) |
965 | return 0; | |
966 | ||
967 | if (memcmp(&r1->nh, &r2->nh, sizeof(struct nexthop))) | |
968 | return 0; | |
969 | return 1; | |
970 | } | |
bbe6ffd6 | 971 | |
70eabd12 PG |
972 | struct bgp_pbr_action *bgp_pbr_action_rule_lookup(vrf_id_t vrf_id, |
973 | uint32_t unique) | |
bbe6ffd6 | 974 | { |
70eabd12 PG |
975 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); |
976 | struct bgp_pbr_action_unique bpau; | |
977 | ||
978 | if (!bgp || unique == 0) | |
979 | return NULL; | |
980 | bpau.unique = unique; | |
981 | bpau.bpa_found = NULL; | |
982 | hash_walk(bgp->pbr_action_hash, bgp_pbr_action_walkcb, &bpau); | |
983 | return bpau.bpa_found; | |
bbe6ffd6 PG |
984 | } |
985 | ||
986 | struct bgp_pbr_match *bgp_pbr_match_ipset_lookup(vrf_id_t vrf_id, | |
987 | uint32_t unique) | |
988 | { | |
c5d429e1 PG |
989 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); |
990 | struct bgp_pbr_match_unique bpmu; | |
991 | ||
992 | if (!bgp || unique == 0) | |
993 | return NULL; | |
994 | bpmu.unique = unique; | |
995 | bpmu.bpm_found = NULL; | |
996 | hash_walk(bgp->pbr_match_hash, bgp_pbr_match_walkcb, &bpmu); | |
997 | return bpmu.bpm_found; | |
bbe6ffd6 PG |
998 | } |
999 | ||
1000 | struct bgp_pbr_match_entry *bgp_pbr_match_ipset_entry_lookup(vrf_id_t vrf_id, | |
1001 | char *ipset_name, | |
1002 | uint32_t unique) | |
1003 | { | |
c5d429e1 PG |
1004 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); |
1005 | struct bgp_pbr_match_entry_unique bpmeu; | |
1006 | struct bgp_pbr_match_ipsetname bpmi; | |
1007 | ||
1008 | if (!bgp || unique == 0) | |
1009 | return NULL; | |
1010 | bpmi.ipsetname = XCALLOC(MTYPE_TMP, ZEBRA_IPSET_NAME_SIZE); | |
1011 | snprintf(bpmi.ipsetname, ZEBRA_IPSET_NAME_SIZE, "%s", ipset_name); | |
1012 | bpmi.bpm_found = NULL; | |
1013 | hash_walk(bgp->pbr_match_hash, bgp_pbr_match_pername_walkcb, &bpmi); | |
1014 | XFREE(MTYPE_TMP, bpmi.ipsetname); | |
1015 | if (!bpmi.bpm_found) | |
1016 | return NULL; | |
1017 | bpmeu.bpme_found = NULL; | |
1018 | bpmeu.unique = unique; | |
1019 | hash_walk(bpmi.bpm_found->entry_hash, | |
1020 | bgp_pbr_match_entry_walkcb, &bpmeu); | |
1021 | return bpmeu.bpme_found; | |
bbe6ffd6 PG |
1022 | } |
1023 | ||
1815c6fc PG |
1024 | struct bgp_pbr_match *bgp_pbr_match_iptable_lookup(vrf_id_t vrf_id, |
1025 | uint32_t unique) | |
1026 | { | |
1027 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); | |
1028 | struct bgp_pbr_match_iptable_unique bpmiu; | |
1029 | ||
1030 | if (!bgp || unique == 0) | |
1031 | return NULL; | |
1032 | bpmiu.unique = unique; | |
1033 | bpmiu.bpm_found = NULL; | |
1034 | hash_walk(bgp->pbr_match_hash, bgp_pbr_match_iptable_walkcb, &bpmiu); | |
1035 | return bpmiu.bpm_found; | |
1036 | } | |
1037 | ||
a6b07429 PG |
1038 | void bgp_pbr_cleanup(struct bgp *bgp) |
1039 | { | |
1040 | if (bgp->pbr_match_hash) { | |
1041 | hash_clean(bgp->pbr_match_hash, bgp_pbr_match_free); | |
1042 | hash_free(bgp->pbr_match_hash); | |
1043 | bgp->pbr_match_hash = NULL; | |
1044 | } | |
1045 | if (bgp->pbr_action_hash) { | |
1046 | hash_clean(bgp->pbr_action_hash, bgp_pbr_action_free); | |
1047 | hash_free(bgp->pbr_action_hash); | |
1048 | bgp->pbr_action_hash = NULL; | |
1049 | } | |
4762c213 PG |
1050 | if (bgp->bgp_pbr_cfg == NULL) |
1051 | return; | |
1052 | bgp_pbr_reset(bgp, AFI_IP); | |
1053 | XFREE(MTYPE_PBR, bgp->bgp_pbr_cfg); | |
1054 | bgp->bgp_pbr_cfg = NULL; | |
a6b07429 PG |
1055 | } |
1056 | ||
f3d32faa PG |
1057 | void bgp_pbr_init(struct bgp *bgp) |
1058 | { | |
1059 | bgp->pbr_match_hash = | |
1060 | hash_create_size(8, bgp_pbr_match_hash_key, | |
1061 | bgp_pbr_match_hash_equal, | |
1062 | "Match Hash"); | |
1063 | bgp->pbr_action_hash = | |
1064 | hash_create_size(8, bgp_pbr_action_hash_key, | |
1065 | bgp_pbr_action_hash_equal, | |
1066 | "Match Hash Entry"); | |
4762c213 PG |
1067 | |
1068 | bgp->bgp_pbr_cfg = XCALLOC(MTYPE_PBR, sizeof(struct bgp_pbr_config)); | |
1069 | bgp->bgp_pbr_cfg->pbr_interface_any_ipv4 = true; | |
f3d32faa | 1070 | } |
b46b6f1a PG |
1071 | |
1072 | void bgp_pbr_print_policy_route(struct bgp_pbr_entry_main *api) | |
1073 | { | |
1074 | int i = 0; | |
1075 | char return_string[512]; | |
1076 | char *ptr = return_string; | |
1077 | char buff[64]; | |
1078 | int nb_items = 0; | |
1079 | ||
1080 | ptr += sprintf(ptr, "MATCH : "); | |
1081 | if (api->match_bitmask & PREFIX_SRC_PRESENT) { | |
1082 | struct prefix *p = &(api->src_prefix); | |
1083 | ||
1084 | ptr += sprintf(ptr, "@src %s", prefix2str(p, buff, 64)); | |
1085 | INCREMENT_DISPLAY(ptr, nb_items); | |
1086 | } | |
1087 | if (api->match_bitmask & PREFIX_DST_PRESENT) { | |
1088 | struct prefix *p = &(api->dst_prefix); | |
1089 | ||
1090 | INCREMENT_DISPLAY(ptr, nb_items); | |
1091 | ptr += sprintf(ptr, "@dst %s", prefix2str(p, buff, 64)); | |
1092 | } | |
1093 | ||
1094 | if (api->match_protocol_num) | |
1095 | INCREMENT_DISPLAY(ptr, nb_items); | |
1096 | for (i = 0; i < api->match_protocol_num; i++) | |
1097 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->protocol[i], | |
1098 | i > 0 ? NULL : "@proto "); | |
1099 | ||
1100 | if (api->match_src_port_num) | |
1101 | INCREMENT_DISPLAY(ptr, nb_items); | |
1102 | for (i = 0; i < api->match_src_port_num; i++) | |
1103 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->src_port[i], | |
1104 | i > 0 ? NULL : "@srcport "); | |
1105 | ||
1106 | if (api->match_dst_port_num) | |
1107 | INCREMENT_DISPLAY(ptr, nb_items); | |
1108 | for (i = 0; i < api->match_dst_port_num; i++) | |
1109 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->dst_port[i], | |
1110 | i > 0 ? NULL : "@dstport "); | |
1111 | ||
1112 | if (api->match_port_num) | |
1113 | INCREMENT_DISPLAY(ptr, nb_items); | |
1114 | for (i = 0; i < api->match_port_num; i++) | |
1115 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->port[i], | |
1116 | i > 0 ? NULL : "@port "); | |
1117 | ||
1118 | if (api->match_icmp_type_num) | |
1119 | INCREMENT_DISPLAY(ptr, nb_items); | |
1120 | for (i = 0; i < api->match_icmp_type_num; i++) | |
1121 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->icmp_type[i], | |
1122 | i > 0 ? NULL : "@icmptype "); | |
1123 | ||
1124 | if (api->match_icmp_code_num) | |
1125 | INCREMENT_DISPLAY(ptr, nb_items); | |
1126 | for (i = 0; i < api->match_icmp_code_num; i++) | |
1127 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->icmp_code[i], | |
1128 | i > 0 ? NULL : "@icmpcode "); | |
1129 | ||
1130 | if (api->match_packet_length_num) | |
1131 | INCREMENT_DISPLAY(ptr, nb_items); | |
1132 | for (i = 0; i < api->match_packet_length_num; i++) | |
1133 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->packet_length[i], | |
1134 | i > 0 ? NULL : "@plen "); | |
1135 | ||
1136 | if (api->match_dscp_num) | |
1137 | INCREMENT_DISPLAY(ptr, nb_items); | |
1138 | for (i = 0; i < api->match_dscp_num; i++) | |
1139 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->dscp[i], | |
1140 | i > 0 ? NULL : "@dscp "); | |
1141 | ||
1142 | if (api->match_tcpflags_num) | |
1143 | INCREMENT_DISPLAY(ptr, nb_items); | |
1144 | for (i = 0; i < api->match_tcpflags_num; i++) | |
1145 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->tcpflags[i], | |
1146 | i > 0 ? NULL : "@tcpflags "); | |
1147 | ||
588ec356 | 1148 | if (api->match_fragment_num) |
b46b6f1a | 1149 | INCREMENT_DISPLAY(ptr, nb_items); |
588ec356 PG |
1150 | for (i = 0; i < api->match_fragment_num; i++) |
1151 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->fragment[i], | |
1152 | i > 0 ? NULL : "@fragment "); | |
b46b6f1a PG |
1153 | if (!nb_items) |
1154 | ptr = return_string; | |
1155 | else | |
1156 | ptr += sprintf(ptr, "; "); | |
1157 | if (api->action_num) | |
1158 | ptr += sprintf(ptr, "SET : "); | |
1159 | nb_items = 0; | |
1160 | for (i = 0; i < api->action_num; i++) { | |
1161 | switch (api->actions[i].action) { | |
1162 | case ACTION_TRAFFICRATE: | |
1163 | INCREMENT_DISPLAY(ptr, nb_items); | |
1164 | ptr += sprintf(ptr, "@set rate %f", | |
1165 | api->actions[i].u.r.rate); | |
1166 | break; | |
1167 | case ACTION_TRAFFIC_ACTION: | |
1168 | INCREMENT_DISPLAY(ptr, nb_items); | |
1169 | ptr += sprintf(ptr, "@action "); | |
1170 | if (api->actions[i].u.za.filter | |
1171 | & TRAFFIC_ACTION_TERMINATE) | |
1172 | ptr += sprintf(ptr, | |
1173 | " terminate (apply filter(s))"); | |
1174 | if (api->actions[i].u.za.filter | |
1175 | & TRAFFIC_ACTION_DISTRIBUTE) | |
1176 | ptr += sprintf(ptr, " distribute"); | |
1177 | if (api->actions[i].u.za.filter | |
1178 | & TRAFFIC_ACTION_SAMPLE) | |
1179 | ptr += sprintf(ptr, " sample"); | |
1180 | break; | |
1181 | case ACTION_REDIRECT_IP: | |
1182 | INCREMENT_DISPLAY(ptr, nb_items); | |
1183 | char local_buff[INET_ADDRSTRLEN]; | |
1184 | ||
1185 | if (inet_ntop(AF_INET, | |
1186 | &api->actions[i].u.zr.redirect_ip_v4, | |
1187 | local_buff, INET_ADDRSTRLEN) != NULL) | |
1188 | ptr += sprintf(ptr, | |
1189 | "@redirect ip nh %s", local_buff); | |
1190 | break; | |
1191 | case ACTION_REDIRECT: | |
1192 | INCREMENT_DISPLAY(ptr, nb_items); | |
1193 | ptr += sprintf(ptr, "@redirect vrf %u", | |
1194 | api->actions[i].u.redirect_vrf); | |
1195 | break; | |
1196 | case ACTION_MARKING: | |
1197 | INCREMENT_DISPLAY(ptr, nb_items); | |
1198 | ptr += sprintf(ptr, "@set dscp %u", | |
1199 | api->actions[i].u.marking_dscp); | |
1200 | break; | |
1201 | default: | |
1202 | break; | |
1203 | } | |
1204 | } | |
1205 | zlog_info("%s", return_string); | |
1206 | } | |
45918cfb | 1207 | |
d114b0d7 PG |
1208 | static void bgp_pbr_flush_entry(struct bgp *bgp, struct bgp_pbr_action *bpa, |
1209 | struct bgp_pbr_match *bpm, | |
1210 | struct bgp_pbr_match_entry *bpme) | |
1211 | { | |
1212 | /* if bpme is null, bpm is also null | |
1213 | */ | |
1214 | if (bpme == NULL) | |
1215 | return; | |
1216 | /* ipset del entry */ | |
1217 | if (bpme->installed) { | |
1218 | bgp_send_pbr_ipset_entry_match(bpme, false); | |
1219 | bpme->installed = false; | |
1220 | bpme->backpointer = NULL; | |
b588b642 PG |
1221 | if (bpme->bgp_info) { |
1222 | struct bgp_info *bgp_info; | |
1223 | struct bgp_info_extra *extra; | |
1224 | ||
1225 | /* unlink bgp_info to bpme */ | |
1226 | bgp_info = (struct bgp_info *)bpme->bgp_info; | |
1227 | extra = bgp_info_extra_get(bgp_info); | |
1228 | extra->bgp_fs_pbr = NULL; | |
1229 | bpme->bgp_info = NULL; | |
1230 | } | |
d114b0d7 PG |
1231 | } |
1232 | hash_release(bpm->entry_hash, bpme); | |
1233 | if (hashcount(bpm->entry_hash) == 0) { | |
1234 | /* delete iptable entry first */ | |
1235 | /* then delete ipset match */ | |
1236 | if (bpm->installed) { | |
1237 | if (bpm->installed_in_iptable) { | |
1238 | bgp_send_pbr_iptable(bpm->action, | |
1239 | bpm, false); | |
1240 | bpm->installed_in_iptable = false; | |
a6b07429 | 1241 | bpm->action->refcnt--; |
d114b0d7 PG |
1242 | } |
1243 | bgp_send_pbr_ipset_match(bpm, false); | |
1244 | bpm->installed = false; | |
1245 | bpm->action = NULL; | |
1246 | } | |
1247 | hash_release(bgp->pbr_match_hash, bpm); | |
1248 | /* XXX release pbr_match_action if not used | |
1249 | * note that drop does not need to call send_pbr_action | |
1250 | */ | |
1251 | } | |
a6b07429 PG |
1252 | if (bpa->refcnt == 0) { |
1253 | if (bpa->installed && bpa->table_id != 0) { | |
1254 | bgp_send_pbr_rule_action(bpa, false); | |
1255 | bgp_zebra_announce_default(bpa->bgp, &(bpa->nh), | |
1256 | AFI_IP, | |
1257 | bpa->table_id, | |
1258 | false); | |
6ee20355 | 1259 | bpa->installed = false; |
a6b07429 PG |
1260 | } |
1261 | } | |
d114b0d7 PG |
1262 | } |
1263 | ||
1264 | struct bgp_pbr_match_entry_remain { | |
1265 | struct bgp_pbr_match_entry *bpme_to_match; | |
1266 | struct bgp_pbr_match_entry *bpme_found; | |
1267 | }; | |
1268 | ||
1269 | static int bgp_pbr_get_remaining_entry(struct hash_backet *backet, void *arg) | |
1270 | { | |
1271 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
1272 | struct bgp_pbr_match_entry_remain *bpmer = | |
1273 | (struct bgp_pbr_match_entry_remain *)arg; | |
1274 | struct bgp_pbr_match *bpm_temp; | |
1275 | struct bgp_pbr_match_entry *bpme = bpmer->bpme_to_match; | |
1276 | ||
1277 | if (!bpme->backpointer || | |
1278 | bpm == bpme->backpointer || | |
1279 | bpme->backpointer->action == bpm->action) | |
1280 | return HASHWALK_CONTINUE; | |
1281 | /* ensure bpm other characteristics are equal */ | |
1282 | bpm_temp = bpme->backpointer; | |
1283 | if (bpm_temp->vrf_id != bpm->vrf_id || | |
1284 | bpm_temp->type != bpm->type || | |
1285 | bpm_temp->flags != bpm->flags) | |
1286 | return HASHWALK_CONTINUE; | |
1287 | ||
1288 | /* look for remaining bpme */ | |
1289 | bpmer->bpme_found = hash_lookup(bpm->entry_hash, bpme); | |
1290 | if (!bpmer->bpme_found) | |
1291 | return HASHWALK_CONTINUE; | |
1292 | return HASHWALK_ABORT; | |
1293 | } | |
1294 | ||
9bba1455 | 1295 | static void bgp_pbr_policyroute_remove_from_zebra_unit(struct bgp *bgp, |
0e867886 PG |
1296 | struct bgp_info *binfo, |
1297 | struct bgp_pbr_filter *bpf) | |
d114b0d7 PG |
1298 | { |
1299 | struct bgp_pbr_match temp; | |
1300 | struct bgp_pbr_match_entry temp2; | |
1301 | struct bgp_pbr_match *bpm; | |
1302 | struct bgp_pbr_match_entry *bpme; | |
1303 | struct bgp_pbr_match_entry_remain bpmer; | |
0e867886 PG |
1304 | struct bgp_pbr_range_port *src_port; |
1305 | struct bgp_pbr_range_port *dst_port; | |
1306 | struct bgp_pbr_range_port *pkt_len; | |
1307 | ||
1308 | if (!bpf) | |
1309 | return; | |
1310 | src_port = bpf->src_port; | |
1311 | dst_port = bpf->dst_port; | |
1312 | pkt_len = bpf->pkt_len; | |
d114b0d7 PG |
1313 | |
1314 | /* as we don't know information from EC | |
1315 | * look for bpm that have the bpm | |
1316 | * with vrf_id characteristics | |
1317 | */ | |
1318 | memset(&temp2, 0, sizeof(temp2)); | |
1319 | memset(&temp, 0, sizeof(temp)); | |
0e867886 | 1320 | if (bpf->src) { |
d114b0d7 | 1321 | temp.flags |= MATCH_IP_SRC_SET; |
0e867886 | 1322 | prefix_copy(&temp2.src, bpf->src); |
d114b0d7 PG |
1323 | } else |
1324 | temp2.src.family = AF_INET; | |
0e867886 | 1325 | if (bpf->dst) { |
d114b0d7 | 1326 | temp.flags |= MATCH_IP_DST_SET; |
0e867886 | 1327 | prefix_copy(&temp2.dst, bpf->dst); |
d114b0d7 PG |
1328 | } else |
1329 | temp2.dst.family = AF_INET; | |
3bed2363 PG |
1330 | if (src_port && (src_port->min_port || bpf->protocol == IPPROTO_ICMP)) { |
1331 | if (bpf->protocol == IPPROTO_ICMP) | |
1332 | temp.flags |= MATCH_ICMP_SET; | |
1de7dfff PG |
1333 | temp.flags |= MATCH_PORT_SRC_SET; |
1334 | temp2.src_port_min = src_port->min_port; | |
1335 | if (src_port->max_port) { | |
1336 | temp.flags |= MATCH_PORT_SRC_RANGE_SET; | |
1337 | temp2.src_port_max = src_port->max_port; | |
1338 | } | |
1339 | } | |
3bed2363 PG |
1340 | if (dst_port && (dst_port->min_port || bpf->protocol == IPPROTO_ICMP)) { |
1341 | if (bpf->protocol == IPPROTO_ICMP) | |
1342 | temp.flags |= MATCH_ICMP_SET; | |
1de7dfff PG |
1343 | temp.flags |= MATCH_PORT_DST_SET; |
1344 | temp2.dst_port_min = dst_port->min_port; | |
1345 | if (dst_port->max_port) { | |
1346 | temp.flags |= MATCH_PORT_DST_RANGE_SET; | |
1347 | temp2.dst_port_max = dst_port->max_port; | |
1348 | } | |
1349 | } | |
0e867886 | 1350 | temp2.proto = bpf->protocol; |
1de7dfff | 1351 | |
cfaf18ce | 1352 | if (pkt_len) { |
83360720 | 1353 | temp.pkt_len_min = pkt_len->min_port; |
cfaf18ce PG |
1354 | if (pkt_len->max_port) |
1355 | temp.pkt_len_max = pkt_len->max_port; | |
1356 | } else if (bpf->pkt_len_val) { | |
1357 | if (bpf->pkt_len_val->mask) | |
1358 | temp.flags |= MATCH_PKT_LEN_INVERSE_SET; | |
1359 | temp.pkt_len_min = bpf->pkt_len_val->val; | |
1360 | } | |
2da7d62e PG |
1361 | if (bpf->tcp_flags) { |
1362 | temp.tcp_flags = bpf->tcp_flags->val; | |
1363 | temp.tcp_mask_flags = bpf->tcp_flags->mask; | |
1364 | } | |
4977bd6c PG |
1365 | if (bpf->dscp) { |
1366 | if (bpf->dscp->mask) | |
1367 | temp.flags |= MATCH_DSCP_INVERSE_SET; | |
1368 | else | |
1369 | temp.flags |= MATCH_DSCP_SET; | |
1370 | temp.dscp_value = bpf->dscp->val; | |
1371 | } | |
6f5617d8 PG |
1372 | if (bpf->fragment) { |
1373 | if (bpf->fragment->mask) | |
1374 | temp.flags |= MATCH_FRAGMENT_INVERSE_SET; | |
1375 | temp.fragment = bpf->fragment->val; | |
1376 | } | |
83360720 | 1377 | |
0e867886 | 1378 | if (bpf->src == NULL || bpf->dst == NULL) { |
1de7dfff PG |
1379 | if (temp.flags & (MATCH_PORT_DST_SET | MATCH_PORT_SRC_SET)) |
1380 | temp.type = IPSET_NET_PORT; | |
1381 | else | |
1382 | temp.type = IPSET_NET; | |
1383 | } else { | |
1384 | if (temp.flags & (MATCH_PORT_DST_SET | MATCH_PORT_SRC_SET)) | |
1385 | temp.type = IPSET_NET_PORT_NET; | |
1386 | else | |
1387 | temp.type = IPSET_NET_NET; | |
1388 | } | |
0e867886 | 1389 | if (bpf->vrf_id == VRF_UNKNOWN) /* XXX case BGP destroy */ |
d114b0d7 PG |
1390 | temp.vrf_id = 0; |
1391 | else | |
0e867886 | 1392 | temp.vrf_id = bpf->vrf_id; |
d114b0d7 PG |
1393 | bpme = &temp2; |
1394 | bpm = &temp; | |
1395 | bpme->backpointer = bpm; | |
1396 | /* right now, a previous entry may already exist | |
1397 | * flush previous entry if necessary | |
1398 | */ | |
1399 | bpmer.bpme_to_match = bpme; | |
1400 | bpmer.bpme_found = NULL; | |
1401 | hash_walk(bgp->pbr_match_hash, bgp_pbr_get_remaining_entry, &bpmer); | |
1402 | if (bpmer.bpme_found) { | |
1403 | static struct bgp_pbr_match *local_bpm; | |
1404 | static struct bgp_pbr_action *local_bpa; | |
1405 | ||
1406 | local_bpm = bpmer.bpme_found->backpointer; | |
1407 | local_bpa = local_bpm->action; | |
1408 | bgp_pbr_flush_entry(bgp, local_bpa, | |
1409 | local_bpm, bpmer.bpme_found); | |
1410 | } | |
1411 | } | |
1412 | ||
e45aea59 PG |
1413 | static uint8_t bgp_pbr_next_type_entry(uint8_t type_entry) |
1414 | { | |
1415 | if (type_entry == FLOWSPEC_TCP_FLAGS) | |
1416 | return FLOWSPEC_DSCP; | |
1417 | if (type_entry == FLOWSPEC_DSCP) | |
1418 | return FLOWSPEC_PKT_LEN; | |
1419 | if (type_entry == FLOWSPEC_PKT_LEN) | |
1420 | return FLOWSPEC_FRAGMENT; | |
da3fa383 PG |
1421 | if (type_entry == FLOWSPEC_FRAGMENT) |
1422 | return FLOWSPEC_ICMP_TYPE; | |
e45aea59 PG |
1423 | return 0; |
1424 | } | |
1425 | ||
da3fa383 PG |
1426 | static void bgp_pbr_icmp_action(struct bgp *bgp, |
1427 | struct bgp_info *binfo, | |
1428 | struct bgp_pbr_filter *bpf, | |
1429 | struct bgp_pbr_or_filter *bpof, | |
1430 | bool add, | |
1431 | struct nexthop *nh, | |
1432 | float *rate) | |
1433 | { | |
1434 | struct bgp_pbr_range_port srcp, dstp; | |
1435 | struct bgp_pbr_val_mask *icmp_type, *icmp_code; | |
1436 | struct listnode *tnode, *cnode; | |
1437 | ||
1438 | if (!bpf) | |
1439 | return; | |
1440 | if (bpf->protocol != IPPROTO_ICMP) | |
1441 | return; | |
1442 | bpf->src_port = &srcp; | |
1443 | bpf->dst_port = &dstp; | |
1444 | /* parse icmp type and lookup appropriate icmp code | |
1445 | * if no icmp code found, create as many entryes as | |
1446 | * there are listed icmp codes for that icmp type | |
1447 | */ | |
1448 | if (!bpof->icmp_type) { | |
1449 | srcp.min_port = 0; | |
1450 | srcp.max_port = 255; | |
1451 | for (ALL_LIST_ELEMENTS_RO(bpof->icmp_code, cnode, icmp_code)) { | |
1452 | dstp.min_port = icmp_code->val; | |
1453 | if (add) | |
1454 | bgp_pbr_policyroute_add_to_zebra_unit(bgp, binfo, | |
1455 | bpf, nh, rate); | |
1456 | else | |
1457 | bgp_pbr_policyroute_remove_from_zebra_unit( | |
1458 | bgp, binfo, bpf); | |
1459 | } | |
1460 | return; | |
1461 | } | |
1462 | for (ALL_LIST_ELEMENTS_RO(bpof->icmp_type, tnode, icmp_type)) { | |
1463 | srcp.min_port = icmp_type->val; | |
1464 | srcp.max_port = 0; | |
1465 | dstp.max_port = 0; | |
1466 | /* only icmp type. create an entry only with icmp type */ | |
1467 | if (!bpof->icmp_code) { | |
1468 | /* icmp type is not one of the above | |
1469 | * forge an entry only based on the icmp type | |
1470 | */ | |
1471 | dstp.min_port = 0; | |
1472 | dstp.max_port = 255; | |
1473 | if (add) | |
1474 | bgp_pbr_policyroute_add_to_zebra_unit( | |
1475 | bgp, binfo, | |
1476 | bpf, nh, rate); | |
1477 | else | |
1478 | bgp_pbr_policyroute_remove_from_zebra_unit(bgp, | |
1479 | binfo, bpf); | |
1480 | continue; | |
1481 | } | |
1482 | for (ALL_LIST_ELEMENTS_RO(bpof->icmp_code, cnode, icmp_code)) { | |
1483 | dstp.min_port = icmp_code->val; | |
1484 | if (add) | |
1485 | bgp_pbr_policyroute_add_to_zebra_unit( | |
1486 | bgp, binfo, | |
1487 | bpf, nh, rate); | |
1488 | else | |
1489 | bgp_pbr_policyroute_remove_from_zebra_unit( | |
1490 | bgp, binfo, bpf); | |
1491 | } | |
1492 | } | |
1493 | } | |
1494 | ||
56707a36 PG |
1495 | static void bgp_pbr_policyroute_remove_from_zebra_recursive(struct bgp *bgp, |
1496 | struct bgp_info *binfo, | |
1497 | struct bgp_pbr_filter *bpf, | |
1498 | struct bgp_pbr_or_filter *bpof, | |
1499 | uint8_t type_entry) | |
1500 | { | |
1501 | struct listnode *node, *nnode; | |
1502 | struct bgp_pbr_val_mask *valmask; | |
1503 | uint8_t next_type_entry; | |
1504 | struct list *orig_list; | |
1505 | struct bgp_pbr_val_mask **target_val; | |
1506 | ||
1507 | if (type_entry == 0) | |
1508 | return bgp_pbr_policyroute_remove_from_zebra_unit(bgp, | |
1509 | binfo, bpf); | |
e45aea59 | 1510 | next_type_entry = bgp_pbr_next_type_entry(type_entry); |
56707a36 | 1511 | if (type_entry == FLOWSPEC_TCP_FLAGS && bpof->tcpflags) { |
56707a36 PG |
1512 | orig_list = bpof->tcpflags; |
1513 | target_val = &bpf->tcp_flags; | |
1514 | } else if (type_entry == FLOWSPEC_DSCP && bpof->dscp) { | |
56707a36 PG |
1515 | orig_list = bpof->dscp; |
1516 | target_val = &bpf->dscp; | |
cfaf18ce | 1517 | } else if (type_entry == FLOWSPEC_PKT_LEN && bpof->pkt_len) { |
cfaf18ce PG |
1518 | orig_list = bpof->pkt_len; |
1519 | target_val = &bpf->pkt_len_val; | |
6f5617d8 | 1520 | } else if (type_entry == FLOWSPEC_FRAGMENT && bpof->fragment) { |
6f5617d8 PG |
1521 | orig_list = bpof->fragment; |
1522 | target_val = &bpf->fragment; | |
da3fa383 PG |
1523 | } else if (type_entry == FLOWSPEC_ICMP_TYPE && |
1524 | (bpof->icmp_type || bpof->icmp_code)) { | |
1525 | /* enumerate list for icmp - must be last one */ | |
1526 | bgp_pbr_icmp_action(bgp, binfo, bpf, bpof, false, NULL, NULL); | |
1527 | return; | |
56707a36 | 1528 | } else { |
e45aea59 PG |
1529 | return bgp_pbr_policyroute_remove_from_zebra_recursive(bgp, |
1530 | binfo, | |
1531 | bpf, bpof, | |
1532 | next_type_entry); | |
56707a36 PG |
1533 | } |
1534 | for (ALL_LIST_ELEMENTS(orig_list, node, nnode, valmask)) { | |
1535 | *target_val = valmask; | |
1536 | bgp_pbr_policyroute_remove_from_zebra_recursive(bgp, binfo, | |
1537 | bpf, bpof, | |
1538 | next_type_entry); | |
1539 | } | |
1540 | } | |
1541 | ||
9bba1455 PG |
1542 | static void bgp_pbr_policyroute_remove_from_zebra(struct bgp *bgp, |
1543 | struct bgp_info *binfo, | |
1544 | struct bgp_pbr_filter *bpf, | |
1545 | struct bgp_pbr_or_filter *bpof) | |
1546 | { | |
56707a36 PG |
1547 | if (!bpof) |
1548 | return bgp_pbr_policyroute_remove_from_zebra_unit(bgp, | |
1549 | binfo, | |
1550 | bpf); | |
1551 | if (bpof->tcpflags) | |
1552 | bgp_pbr_policyroute_remove_from_zebra_recursive(bgp, binfo, | |
1553 | bpf, bpof, | |
1554 | FLOWSPEC_TCP_FLAGS); | |
1555 | else if (bpof->dscp) | |
1556 | bgp_pbr_policyroute_remove_from_zebra_recursive(bgp, binfo, | |
1557 | bpf, bpof, | |
1558 | FLOWSPEC_DSCP); | |
cfaf18ce PG |
1559 | else if (bpof->pkt_len) |
1560 | bgp_pbr_policyroute_remove_from_zebra_recursive(bgp, binfo, | |
1561 | bpf, bpof, | |
1562 | FLOWSPEC_PKT_LEN); | |
6f5617d8 PG |
1563 | else if (bpof->fragment) |
1564 | bgp_pbr_policyroute_remove_from_zebra_recursive(bgp, binfo, | |
1565 | bpf, bpof, | |
1566 | FLOWSPEC_FRAGMENT); | |
da3fa383 PG |
1567 | else if (bpof->icmp_type || bpof->icmp_code) |
1568 | bgp_pbr_policyroute_remove_from_zebra_recursive(bgp, binfo, | |
1569 | bpf, bpof, | |
1570 | FLOWSPEC_ICMP_TYPE); | |
56707a36 | 1571 | else |
9bba1455 | 1572 | bgp_pbr_policyroute_remove_from_zebra_unit(bgp, binfo, bpf); |
56707a36 PG |
1573 | /* flush bpof */ |
1574 | if (bpof->tcpflags) | |
1575 | list_delete_all_node(bpof->tcpflags); | |
1576 | if (bpof->dscp) | |
1577 | list_delete_all_node(bpof->dscp); | |
cfaf18ce PG |
1578 | if (bpof->pkt_len) |
1579 | list_delete_all_node(bpof->pkt_len); | |
6f5617d8 PG |
1580 | if (bpof->fragment) |
1581 | list_delete_all_node(bpof->fragment); | |
9bba1455 PG |
1582 | } |
1583 | ||
1584 | static void bgp_pbr_policyroute_add_to_zebra_unit(struct bgp *bgp, | |
1de7dfff | 1585 | struct bgp_info *binfo, |
0e867886 | 1586 | struct bgp_pbr_filter *bpf, |
1de7dfff | 1587 | struct nexthop *nh, |
0e867886 | 1588 | float *rate) |
d114b0d7 PG |
1589 | { |
1590 | struct bgp_pbr_match temp; | |
1591 | struct bgp_pbr_match_entry temp2; | |
1592 | struct bgp_pbr_match *bpm; | |
1593 | struct bgp_pbr_match_entry *bpme = NULL; | |
1594 | struct bgp_pbr_action temp3; | |
1595 | struct bgp_pbr_action *bpa = NULL; | |
1596 | struct bgp_pbr_match_entry_remain bpmer; | |
0e867886 PG |
1597 | struct bgp_pbr_range_port *src_port; |
1598 | struct bgp_pbr_range_port *dst_port; | |
1599 | struct bgp_pbr_range_port *pkt_len; | |
1600 | ||
1601 | if (!bpf) | |
1602 | return; | |
1603 | src_port = bpf->src_port; | |
1604 | dst_port = bpf->dst_port; | |
1605 | pkt_len = bpf->pkt_len; | |
d114b0d7 | 1606 | |
538f0137 PG |
1607 | if (BGP_DEBUG(zebra, ZEBRA)) { |
1608 | char bufsrc[64], bufdst[64]; | |
1609 | char buffer[64]; | |
1610 | int remaining_len = 0; | |
1611 | char protocol_str[16]; | |
1612 | ||
1613 | protocol_str[0] = '\0'; | |
2da7d62e PG |
1614 | if (bpf->tcp_flags && bpf->tcp_flags->mask) |
1615 | bpf->protocol = IPPROTO_TCP; | |
0e867886 PG |
1616 | if (bpf->protocol) |
1617 | snprintf(protocol_str, sizeof(protocol_str), | |
1618 | "proto %d", bpf->protocol); | |
538f0137 | 1619 | buffer[0] = '\0'; |
0e867886 | 1620 | if (bpf->protocol == IPPROTO_ICMP && src_port && dst_port) |
2da7d62e PG |
1621 | remaining_len += snprintf(buffer, sizeof(buffer), |
1622 | "type %d, code %d", | |
538f0137 | 1623 | src_port->min_port, dst_port->min_port); |
0e867886 PG |
1624 | else if (bpf->protocol == IPPROTO_UDP || |
1625 | bpf->protocol == IPPROTO_TCP) { | |
538f0137 PG |
1626 | |
1627 | if (src_port && src_port->min_port) | |
1628 | remaining_len += snprintf(buffer, | |
1629 | sizeof(buffer), | |
1630 | "from [%u:%u]", | |
1631 | src_port->min_port, | |
1632 | src_port->max_port ? | |
1633 | src_port->max_port : | |
1634 | src_port->min_port); | |
1635 | if (dst_port && dst_port->min_port) | |
1636 | remaining_len += snprintf(buffer + | |
1637 | remaining_len, | |
1638 | sizeof(buffer) | |
1639 | - remaining_len, | |
1640 | "to [%u:%u]", | |
1641 | dst_port->min_port, | |
1642 | dst_port->max_port ? | |
1643 | dst_port->max_port : | |
1644 | dst_port->min_port); | |
1645 | } | |
1646 | if (pkt_len && (pkt_len->min_port || pkt_len->max_port)) { | |
1647 | remaining_len += snprintf(buffer + remaining_len, | |
1648 | sizeof(buffer) | |
1649 | - remaining_len, | |
1650 | " len [%u:%u]", | |
1651 | pkt_len->min_port, | |
1652 | pkt_len->max_port ? | |
1653 | pkt_len->max_port : | |
1654 | pkt_len->min_port); | |
cfaf18ce PG |
1655 | } else if (bpf->pkt_len_val) { |
1656 | remaining_len += snprintf(buffer + remaining_len, | |
1657 | sizeof(buffer) | |
1658 | - remaining_len, | |
1659 | " %s len %u", | |
1660 | bpf->pkt_len_val->mask | |
1661 | ? "!" : "", | |
1662 | bpf->pkt_len_val->val); | |
538f0137 | 1663 | } |
2da7d62e PG |
1664 | if (bpf->tcp_flags) { |
1665 | remaining_len += snprintf(buffer + remaining_len, | |
1666 | sizeof(buffer) | |
1667 | - remaining_len, | |
1668 | "tcpflags %x/%x", | |
1669 | bpf->tcp_flags->val, | |
1670 | bpf->tcp_flags->mask); | |
1671 | } | |
4977bd6c PG |
1672 | if (bpf->dscp) { |
1673 | snprintf(buffer + remaining_len, | |
1674 | sizeof(buffer) | |
1675 | - remaining_len, | |
1676 | "%s dscp %d", | |
1677 | bpf->dscp->mask | |
1678 | ? "!" : "", | |
1679 | bpf->dscp->val); | |
1680 | } | |
538f0137 | 1681 | zlog_info("BGP: adding FS PBR from %s to %s, %s %s", |
0e867886 PG |
1682 | bpf->src == NULL ? "<all>" : |
1683 | prefix2str(bpf->src, bufsrc, sizeof(bufsrc)), | |
1684 | bpf->dst == NULL ? "<all>" : | |
1685 | prefix2str(bpf->dst, bufdst, sizeof(bufdst)), | |
538f0137 PG |
1686 | protocol_str, buffer); |
1687 | } | |
d114b0d7 PG |
1688 | /* look for bpa first */ |
1689 | memset(&temp3, 0, sizeof(temp3)); | |
1690 | if (rate) | |
1691 | temp3.rate = *rate; | |
1692 | if (nh) | |
1693 | memcpy(&temp3.nh, nh, sizeof(struct nexthop)); | |
0e867886 | 1694 | temp3.vrf_id = bpf->vrf_id; |
d114b0d7 PG |
1695 | bpa = hash_get(bgp->pbr_action_hash, &temp3, |
1696 | bgp_pbr_action_alloc_intern); | |
1697 | ||
1698 | if (bpa->fwmark == 0) { | |
d114b0d7 PG |
1699 | /* drop is handled by iptable */ |
1700 | if (nh && nh->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1701 | bpa->table_id = 0; | |
1702 | bpa->installed = true; | |
1703 | } else { | |
31c28cd7 PG |
1704 | bpa->fwmark = bgp_zebra_tm_get_id(); |
1705 | bpa->table_id = bpa->fwmark; | |
d114b0d7 PG |
1706 | bpa->installed = false; |
1707 | } | |
a6b07429 | 1708 | bpa->bgp = bgp; |
d114b0d7 PG |
1709 | bpa->unique = ++bgp_pbr_action_counter_unique; |
1710 | /* 0 value is forbidden */ | |
1711 | bpa->install_in_progress = false; | |
1712 | } | |
1713 | ||
1714 | /* then look for bpm */ | |
1715 | memset(&temp, 0, sizeof(temp)); | |
0e867886 PG |
1716 | temp.vrf_id = bpf->vrf_id; |
1717 | if (bpf->src) | |
d114b0d7 | 1718 | temp.flags |= MATCH_IP_SRC_SET; |
0e867886 | 1719 | if (bpf->dst) |
d114b0d7 | 1720 | temp.flags |= MATCH_IP_DST_SET; |
1de7dfff | 1721 | |
3bed2363 PG |
1722 | if (src_port && (src_port->min_port || bpf->protocol == IPPROTO_ICMP)) { |
1723 | if (bpf->protocol == IPPROTO_ICMP) | |
1724 | temp.flags |= MATCH_ICMP_SET; | |
1de7dfff | 1725 | temp.flags |= MATCH_PORT_SRC_SET; |
3bed2363 PG |
1726 | } |
1727 | if (dst_port && (dst_port->min_port || bpf->protocol == IPPROTO_ICMP)) { | |
1728 | if (bpf->protocol == IPPROTO_ICMP) | |
1729 | temp.flags |= MATCH_ICMP_SET; | |
1de7dfff | 1730 | temp.flags |= MATCH_PORT_DST_SET; |
3bed2363 | 1731 | } |
1de7dfff PG |
1732 | if (src_port && src_port->max_port) |
1733 | temp.flags |= MATCH_PORT_SRC_RANGE_SET; | |
1734 | if (dst_port && dst_port->max_port) | |
1735 | temp.flags |= MATCH_PORT_DST_RANGE_SET; | |
3bed2363 PG |
1736 | |
1737 | if (bpf->src == NULL || bpf->dst == NULL) { | |
1738 | if (temp.flags & (MATCH_PORT_DST_SET | MATCH_PORT_SRC_SET)) | |
1739 | temp.type = IPSET_NET_PORT; | |
1740 | else | |
1741 | temp.type = IPSET_NET; | |
1742 | } else { | |
1743 | if (temp.flags & (MATCH_PORT_DST_SET | MATCH_PORT_SRC_SET)) | |
1744 | temp.type = IPSET_NET_PORT_NET; | |
1745 | else | |
1746 | temp.type = IPSET_NET_NET; | |
1747 | } | |
cfaf18ce | 1748 | if (pkt_len) { |
83360720 | 1749 | temp.pkt_len_min = pkt_len->min_port; |
cfaf18ce PG |
1750 | if (pkt_len->max_port) |
1751 | temp.pkt_len_max = pkt_len->max_port; | |
1752 | } else if (bpf->pkt_len_val) { | |
1753 | if (bpf->pkt_len_val->mask) | |
1754 | temp.flags |= MATCH_PKT_LEN_INVERSE_SET; | |
1755 | temp.pkt_len_min = bpf->pkt_len_val->val; | |
1756 | } | |
2da7d62e PG |
1757 | if (bpf->tcp_flags) { |
1758 | temp.tcp_flags = bpf->tcp_flags->val; | |
1759 | temp.tcp_mask_flags = bpf->tcp_flags->mask; | |
1760 | } | |
4977bd6c PG |
1761 | if (bpf->dscp) { |
1762 | if (bpf->dscp->mask) | |
1763 | temp.flags |= MATCH_DSCP_INVERSE_SET; | |
1764 | else | |
1765 | temp.flags |= MATCH_DSCP_SET; | |
1766 | temp.dscp_value = bpf->dscp->val; | |
1767 | } | |
6f5617d8 PG |
1768 | if (bpf->fragment) { |
1769 | if (bpf->fragment->mask) | |
1770 | temp.flags |= MATCH_FRAGMENT_INVERSE_SET; | |
1771 | temp.fragment = bpf->fragment->val; | |
1772 | } | |
d114b0d7 PG |
1773 | temp.action = bpa; |
1774 | bpm = hash_get(bgp->pbr_match_hash, &temp, | |
1775 | bgp_pbr_match_alloc_intern); | |
1776 | ||
1777 | /* new, then self allocate ipset_name and unique */ | |
1778 | if (bpm && bpm->unique == 0) { | |
1779 | bpm->unique = ++bgp_pbr_match_counter_unique; | |
1780 | /* 0 value is forbidden */ | |
1781 | sprintf(bpm->ipset_name, "match%p", bpm); | |
1782 | bpm->entry_hash = hash_create_size(8, | |
1783 | bgp_pbr_match_entry_hash_key, | |
1784 | bgp_pbr_match_entry_hash_equal, | |
1785 | "Match Entry Hash"); | |
1786 | bpm->installed = false; | |
1787 | ||
1788 | /* unique2 should be updated too */ | |
1789 | bpm->unique2 = ++bgp_pbr_match_iptable_counter_unique; | |
1790 | bpm->installed_in_iptable = false; | |
1791 | bpm->install_in_progress = false; | |
1792 | bpm->install_iptable_in_progress = false; | |
1793 | } | |
1794 | ||
1795 | memset(&temp2, 0, sizeof(temp2)); | |
0e867886 PG |
1796 | if (bpf->src) |
1797 | prefix_copy(&temp2.src, bpf->src); | |
d114b0d7 PG |
1798 | else |
1799 | temp2.src.family = AF_INET; | |
0e867886 PG |
1800 | if (bpf->dst) |
1801 | prefix_copy(&temp2.dst, bpf->dst); | |
d114b0d7 PG |
1802 | else |
1803 | temp2.dst.family = AF_INET; | |
1de7dfff PG |
1804 | temp2.src_port_min = src_port ? src_port->min_port : 0; |
1805 | temp2.dst_port_min = dst_port ? dst_port->min_port : 0; | |
1806 | temp2.src_port_max = src_port ? src_port->max_port : 0; | |
1807 | temp2.dst_port_max = dst_port ? dst_port->max_port : 0; | |
0e867886 | 1808 | temp2.proto = bpf->protocol; |
d114b0d7 PG |
1809 | if (bpm) |
1810 | bpme = hash_get(bpm->entry_hash, &temp2, | |
1de7dfff | 1811 | bgp_pbr_match_entry_alloc_intern); |
d114b0d7 PG |
1812 | if (bpme && bpme->unique == 0) { |
1813 | bpme->unique = ++bgp_pbr_match_entry_counter_unique; | |
1814 | /* 0 value is forbidden */ | |
1815 | bpme->backpointer = bpm; | |
1816 | bpme->installed = false; | |
1817 | bpme->install_in_progress = false; | |
b588b642 PG |
1818 | /* link bgp info to bpme */ |
1819 | bpme->bgp_info = (void *)binfo; | |
d114b0d7 PG |
1820 | } |
1821 | ||
1822 | /* BGP FS: append entry to zebra | |
1823 | * - policies are not routing entries and as such | |
1824 | * route replace semantics don't necessarily follow | |
1825 | * through to policy entries | |
1826 | * - because of that, not all policing information will be stored | |
1827 | * into zebra. and non selected policies will be suppressed from zebra | |
1828 | * - as consequence, in order to bring consistency | |
1829 | * a policy will be added, then ifan ecmp policy exists, | |
1830 | * it will be suppressed subsequently | |
1831 | */ | |
1832 | /* ip rule add */ | |
1a1f4a4c | 1833 | if (!bpa->installed && !bpa->install_in_progress) { |
d114b0d7 | 1834 | bgp_send_pbr_rule_action(bpa, true); |
f7df1907 PG |
1835 | bgp_zebra_announce_default(bgp, nh, |
1836 | AFI_IP, bpa->table_id, true); | |
1837 | } | |
d114b0d7 PG |
1838 | |
1839 | /* ipset create */ | |
1840 | if (bpm && !bpm->installed) | |
1841 | bgp_send_pbr_ipset_match(bpm, true); | |
1842 | /* ipset add */ | |
1843 | if (bpme && !bpme->installed) | |
1844 | bgp_send_pbr_ipset_entry_match(bpme, true); | |
1845 | ||
1846 | /* iptables */ | |
1847 | if (bpm && !bpm->installed_in_iptable) | |
1848 | bgp_send_pbr_iptable(bpa, bpm, true); | |
1849 | ||
1850 | /* A previous entry may already exist | |
1851 | * flush previous entry if necessary | |
1852 | */ | |
1853 | bpmer.bpme_to_match = bpme; | |
1854 | bpmer.bpme_found = NULL; | |
1855 | hash_walk(bgp->pbr_match_hash, bgp_pbr_get_remaining_entry, &bpmer); | |
1856 | if (bpmer.bpme_found) { | |
1857 | static struct bgp_pbr_match *local_bpm; | |
1858 | static struct bgp_pbr_action *local_bpa; | |
1859 | ||
1860 | local_bpm = bpmer.bpme_found->backpointer; | |
1861 | local_bpa = local_bpm->action; | |
1862 | bgp_pbr_flush_entry(bgp, local_bpa, | |
1863 | local_bpm, bpmer.bpme_found); | |
1864 | } | |
1865 | ||
1866 | ||
1867 | } | |
1868 | ||
56707a36 PG |
1869 | static void bgp_pbr_policyroute_add_to_zebra_recursive(struct bgp *bgp, |
1870 | struct bgp_info *binfo, | |
1871 | struct bgp_pbr_filter *bpf, | |
1872 | struct bgp_pbr_or_filter *bpof, | |
1873 | struct nexthop *nh, | |
1874 | float *rate, | |
1875 | uint8_t type_entry) | |
1876 | { | |
1877 | struct listnode *node, *nnode; | |
1878 | struct bgp_pbr_val_mask *valmask; | |
1879 | uint8_t next_type_entry; | |
1880 | struct list *orig_list; | |
1881 | struct bgp_pbr_val_mask **target_val; | |
1882 | ||
1883 | if (type_entry == 0) | |
1884 | return bgp_pbr_policyroute_add_to_zebra_unit(bgp, binfo, bpf, | |
1885 | nh, rate); | |
e45aea59 | 1886 | next_type_entry = bgp_pbr_next_type_entry(type_entry); |
56707a36 | 1887 | if (type_entry == FLOWSPEC_TCP_FLAGS && bpof->tcpflags) { |
56707a36 PG |
1888 | orig_list = bpof->tcpflags; |
1889 | target_val = &bpf->tcp_flags; | |
1890 | } else if (type_entry == FLOWSPEC_DSCP && bpof->dscp) { | |
56707a36 PG |
1891 | orig_list = bpof->dscp; |
1892 | target_val = &bpf->dscp; | |
cfaf18ce | 1893 | } else if (type_entry == FLOWSPEC_PKT_LEN && bpof->pkt_len) { |
cfaf18ce PG |
1894 | orig_list = bpof->pkt_len; |
1895 | target_val = &bpf->pkt_len_val; | |
6f5617d8 | 1896 | } else if (type_entry == FLOWSPEC_FRAGMENT && bpof->fragment) { |
6f5617d8 PG |
1897 | orig_list = bpof->fragment; |
1898 | target_val = &bpf->fragment; | |
da3fa383 PG |
1899 | } else if (type_entry == FLOWSPEC_ICMP_TYPE && |
1900 | (bpof->icmp_type || bpof->icmp_code)) { | |
1901 | /* enumerate list for icmp - must be last one */ | |
1902 | bgp_pbr_icmp_action(bgp, binfo, bpf, bpof, true, nh, rate); | |
1903 | return; | |
56707a36 PG |
1904 | } else { |
1905 | return bgp_pbr_policyroute_add_to_zebra_recursive(bgp, binfo, | |
e45aea59 PG |
1906 | bpf, bpof, nh, rate, |
1907 | next_type_entry); | |
56707a36 PG |
1908 | } |
1909 | for (ALL_LIST_ELEMENTS(orig_list, node, nnode, valmask)) { | |
1910 | *target_val = valmask; | |
1911 | bgp_pbr_policyroute_add_to_zebra_recursive(bgp, binfo, | |
1912 | bpf, bpof, | |
1913 | nh, rate, | |
1914 | next_type_entry); | |
1915 | } | |
1916 | } | |
1917 | ||
9bba1455 PG |
1918 | static void bgp_pbr_policyroute_add_to_zebra(struct bgp *bgp, |
1919 | struct bgp_info *binfo, | |
1920 | struct bgp_pbr_filter *bpf, | |
1921 | struct bgp_pbr_or_filter *bpof, | |
1922 | struct nexthop *nh, | |
1923 | float *rate) | |
1924 | { | |
56707a36 | 1925 | if (!bpof) |
9bba1455 PG |
1926 | return bgp_pbr_policyroute_add_to_zebra_unit(bgp, binfo, |
1927 | bpf, nh, rate); | |
56707a36 PG |
1928 | if (bpof->tcpflags) |
1929 | bgp_pbr_policyroute_add_to_zebra_recursive(bgp, binfo, | |
1930 | bpf, bpof, | |
1931 | nh, rate, | |
1932 | FLOWSPEC_TCP_FLAGS); | |
1933 | else if (bpof->dscp) | |
1934 | bgp_pbr_policyroute_add_to_zebra_recursive(bgp, binfo, | |
1935 | bpf, bpof, | |
1936 | nh, rate, | |
1937 | FLOWSPEC_DSCP); | |
cfaf18ce PG |
1938 | else if (bpof->pkt_len) |
1939 | bgp_pbr_policyroute_add_to_zebra_recursive(bgp, binfo, | |
1940 | bpf, bpof, | |
1941 | nh, rate, | |
1942 | FLOWSPEC_PKT_LEN); | |
6f5617d8 PG |
1943 | else if (bpof->fragment) |
1944 | bgp_pbr_policyroute_add_to_zebra_recursive(bgp, binfo, | |
1945 | bpf, bpof, | |
1946 | nh, rate, | |
1947 | FLOWSPEC_FRAGMENT); | |
da3fa383 PG |
1948 | else if (bpof->icmp_type || bpof->icmp_code) |
1949 | bgp_pbr_policyroute_add_to_zebra_recursive(bgp, binfo, | |
1950 | bpf, bpof, nh, rate, | |
1951 | FLOWSPEC_ICMP_TYPE); | |
56707a36 PG |
1952 | else |
1953 | bgp_pbr_policyroute_add_to_zebra_unit(bgp, binfo, bpf, | |
1954 | nh, rate); | |
1955 | /* flush bpof */ | |
1956 | if (bpof->tcpflags) | |
1957 | list_delete_all_node(bpof->tcpflags); | |
1958 | if (bpof->dscp) | |
1959 | list_delete_all_node(bpof->dscp); | |
cfaf18ce PG |
1960 | if (bpof->pkt_len) |
1961 | list_delete_all_node(bpof->pkt_len); | |
6f5617d8 PG |
1962 | if (bpof->fragment) |
1963 | list_delete_all_node(bpof->fragment); | |
da3fa383 PG |
1964 | if (bpof->icmp_type) |
1965 | list_delete_all_node(bpof->icmp_type); | |
1966 | if (bpof->icmp_code) | |
1967 | list_delete_all_node(bpof->icmp_code); | |
932404b7 PG |
1968 | } |
1969 | ||
d114b0d7 PG |
1970 | static void bgp_pbr_handle_entry(struct bgp *bgp, |
1971 | struct bgp_info *binfo, | |
1972 | struct bgp_pbr_entry_main *api, | |
1973 | bool add) | |
1974 | { | |
1975 | struct nexthop nh; | |
1976 | int i = 0; | |
1977 | int continue_loop = 1; | |
1978 | float rate = 0; | |
1979 | struct prefix *src = NULL, *dst = NULL; | |
1de7dfff PG |
1980 | uint8_t proto = 0; |
1981 | struct bgp_pbr_range_port *srcp = NULL, *dstp = NULL; | |
932404b7 | 1982 | struct bgp_pbr_range_port range, range_icmp_code; |
83360720 | 1983 | struct bgp_pbr_range_port pkt_len; |
0e867886 | 1984 | struct bgp_pbr_filter bpf; |
c5ee26cc PG |
1985 | uint8_t kind_enum; |
1986 | struct bgp_pbr_or_filter bpof; | |
9bba1455 | 1987 | struct bgp_pbr_val_mask bpvm; |
d114b0d7 | 1988 | |
8cda9106 | 1989 | memset(&nh, 0, sizeof(struct nexthop)); |
0e867886 | 1990 | memset(&bpf, 0, sizeof(struct bgp_pbr_filter)); |
c5ee26cc | 1991 | memset(&bpof, 0, sizeof(struct bgp_pbr_or_filter)); |
d114b0d7 PG |
1992 | if (api->match_bitmask & PREFIX_SRC_PRESENT) |
1993 | src = &api->src_prefix; | |
1994 | if (api->match_bitmask & PREFIX_DST_PRESENT) | |
1995 | dst = &api->dst_prefix; | |
1996 | memset(&nh, 0, sizeof(struct nexthop)); | |
1997 | nh.vrf_id = VRF_UNKNOWN; | |
1de7dfff PG |
1998 | if (api->match_protocol_num) |
1999 | proto = (uint8_t)api->protocol[0].value; | |
2000 | /* if match_port is selected, then either src or dst port will be parsed | |
2001 | * but not both at the same time | |
2002 | */ | |
2003 | if (api->match_port_num >= 1) { | |
2004 | bgp_pbr_extract(api->port, | |
2005 | api->match_port_num, | |
2006 | &range); | |
2007 | srcp = dstp = ⦥ | |
2008 | } else if (api->match_src_port_num >= 1) { | |
2009 | bgp_pbr_extract(api->src_port, | |
2010 | api->match_src_port_num, | |
2011 | &range); | |
2012 | srcp = ⦥ | |
2013 | dstp = NULL; | |
2014 | } else if (api->match_dst_port_num >= 1) { | |
2015 | bgp_pbr_extract(api->dst_port, | |
2016 | api->match_dst_port_num, | |
2017 | &range); | |
2018 | dstp = ⦥ | |
2019 | srcp = NULL; | |
2020 | } | |
932404b7 PG |
2021 | if (api->match_icmp_type_num >= 1) { |
2022 | proto = IPPROTO_ICMP; | |
da3fa383 PG |
2023 | if (bgp_pbr_extract(api->icmp_type, |
2024 | api->match_icmp_type_num, | |
2025 | &range)) | |
932404b7 | 2026 | srcp = ⦥ |
da3fa383 PG |
2027 | else { |
2028 | bpof.icmp_type = list_new(); | |
2029 | bgp_pbr_extract_enumerate(api->icmp_type, | |
2030 | api->match_icmp_type_num, | |
2031 | OPERATOR_UNARY_OR, | |
2032 | bpof.icmp_type, | |
2033 | FLOWSPEC_ICMP_TYPE); | |
932404b7 PG |
2034 | } |
2035 | } | |
2036 | if (api->match_icmp_code_num >= 1) { | |
2037 | proto = IPPROTO_ICMP; | |
da3fa383 PG |
2038 | if (bgp_pbr_extract(api->icmp_code, |
2039 | api->match_icmp_code_num, | |
2040 | &range_icmp_code)) | |
932404b7 | 2041 | dstp = &range_icmp_code; |
da3fa383 PG |
2042 | else { |
2043 | bpof.icmp_code = list_new(); | |
2044 | bgp_pbr_extract_enumerate(api->icmp_code, | |
2045 | api->match_icmp_code_num, | |
2046 | OPERATOR_UNARY_OR, | |
2047 | bpof.icmp_code, | |
2048 | FLOWSPEC_ICMP_CODE); | |
932404b7 PG |
2049 | } |
2050 | } | |
2da7d62e | 2051 | |
c5ee26cc PG |
2052 | if (api->match_tcpflags_num) { |
2053 | kind_enum = bgp_pbr_match_val_get_operator(api->tcpflags, | |
2054 | api->match_tcpflags_num); | |
2055 | if (kind_enum == OPERATOR_UNARY_AND) { | |
9bba1455 | 2056 | bpf.tcp_flags = &bpvm; |
c5ee26cc PG |
2057 | bgp_pbr_extract_enumerate(api->tcpflags, |
2058 | api->match_tcpflags_num, | |
35703998 PG |
2059 | OPERATOR_UNARY_AND, |
2060 | bpf.tcp_flags, | |
2061 | FLOWSPEC_TCP_FLAGS); | |
c5ee26cc PG |
2062 | } else if (kind_enum == OPERATOR_UNARY_OR) { |
2063 | bpof.tcpflags = list_new(); | |
2064 | bgp_pbr_extract_enumerate(api->tcpflags, | |
2065 | api->match_tcpflags_num, | |
35703998 PG |
2066 | OPERATOR_UNARY_OR, |
2067 | bpof.tcpflags, | |
2068 | FLOWSPEC_TCP_FLAGS); | |
c5ee26cc PG |
2069 | } |
2070 | } | |
cfaf18ce PG |
2071 | if (api->match_packet_length_num) { |
2072 | bool ret; | |
2073 | ||
2074 | ret = bgp_pbr_extract(api->packet_length, | |
2075 | api->match_packet_length_num, | |
2076 | &pkt_len); | |
2077 | if (ret) | |
2078 | bpf.pkt_len = &pkt_len; | |
2079 | else { | |
2080 | bpof.pkt_len = list_new(); | |
2081 | bgp_pbr_extract_enumerate(api->packet_length, | |
2082 | api->match_packet_length_num, | |
2083 | OPERATOR_UNARY_OR, | |
2084 | bpof.pkt_len, | |
2085 | FLOWSPEC_PKT_LEN); | |
2086 | } | |
2da7d62e | 2087 | } |
4977bd6c | 2088 | if (api->match_dscp_num >= 1) { |
35703998 PG |
2089 | bpof.dscp = list_new(); |
2090 | bgp_pbr_extract_enumerate(api->dscp, api->match_dscp_num, | |
2091 | OPERATOR_UNARY_OR, | |
2092 | bpof.dscp, FLOWSPEC_DSCP); | |
4977bd6c | 2093 | } |
6f5617d8 PG |
2094 | if (api->match_fragment_num) { |
2095 | bpof.fragment = list_new(); | |
2096 | bgp_pbr_extract_enumerate(api->fragment, | |
2097 | api->match_fragment_num, | |
2098 | OPERATOR_UNARY_OR, | |
2099 | bpof.fragment, | |
2100 | FLOWSPEC_FRAGMENT); | |
2101 | } | |
0e867886 PG |
2102 | bpf.vrf_id = api->vrf_id; |
2103 | bpf.src = src; | |
2104 | bpf.dst = dst; | |
2105 | bpf.protocol = proto; | |
0e867886 PG |
2106 | bpf.src_port = srcp; |
2107 | bpf.dst_port = dstp; | |
da3fa383 | 2108 | if (!add) |
932404b7 PG |
2109 | return bgp_pbr_policyroute_remove_from_zebra(bgp, |
2110 | binfo, | |
9bba1455 | 2111 | &bpf, &bpof); |
d114b0d7 PG |
2112 | /* no action for add = true */ |
2113 | for (i = 0; i < api->action_num; i++) { | |
2114 | switch (api->actions[i].action) { | |
2115 | case ACTION_TRAFFICRATE: | |
2116 | /* drop packet */ | |
2117 | if (api->actions[i].u.r.rate == 0) { | |
2118 | nh.vrf_id = api->vrf_id; | |
2119 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
da3fa383 PG |
2120 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, |
2121 | &bpf, &bpof, | |
2122 | &nh, &rate); | |
d114b0d7 PG |
2123 | } else { |
2124 | /* update rate. can be reentrant */ | |
2125 | rate = api->actions[i].u.r.rate; | |
ac7c35f8 | 2126 | if (BGP_DEBUG(pbr, PBR)) { |
d114b0d7 | 2127 | bgp_pbr_print_policy_route(api); |
ac7c35f8 PG |
2128 | zlog_warn("PBR: ignoring Set action rate %f", |
2129 | api->actions[i].u.r.rate); | |
2130 | } | |
d114b0d7 PG |
2131 | } |
2132 | break; | |
2133 | case ACTION_TRAFFIC_ACTION: | |
2134 | if (api->actions[i].u.za.filter | |
2135 | & TRAFFIC_ACTION_SAMPLE) { | |
ac7c35f8 | 2136 | if (BGP_DEBUG(pbr, PBR)) { |
d114b0d7 | 2137 | bgp_pbr_print_policy_route(api); |
ac7c35f8 PG |
2138 | zlog_warn("PBR: Sample action Ignored"); |
2139 | } | |
d114b0d7 PG |
2140 | } |
2141 | #if 0 | |
2142 | if (api->actions[i].u.za.filter | |
2143 | & TRAFFIC_ACTION_DISTRIBUTE) { | |
ac7c35f8 | 2144 | if (BGP_DEBUG(pbr, PBR)) { |
d114b0d7 | 2145 | bgp_pbr_print_policy_route(api); |
ac7c35f8 PG |
2146 | zlog_warn("PBR: Distribute action Applies"); |
2147 | } | |
d114b0d7 PG |
2148 | continue_loop = 0; |
2149 | /* continue forwarding entry as before | |
2150 | * no action | |
2151 | */ | |
2152 | } | |
2153 | #endif /* XXX to confirm behaviour of traffic action. for now , ignore */ | |
2154 | /* terminate action: run other filters | |
2155 | */ | |
2156 | break; | |
2157 | case ACTION_REDIRECT_IP: | |
2158 | nh.type = NEXTHOP_TYPE_IPV4; | |
2159 | nh.gate.ipv4.s_addr = | |
2160 | api->actions[i].u.zr.redirect_ip_v4.s_addr; | |
2161 | nh.vrf_id = api->vrf_id; | |
da3fa383 PG |
2162 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, |
2163 | &bpf, &bpof, | |
2164 | &nh, &rate); | |
d114b0d7 PG |
2165 | /* XXX combination with REDIRECT_VRF |
2166 | * + REDIRECT_NH_IP not done | |
2167 | */ | |
2168 | continue_loop = 0; | |
2169 | break; | |
2170 | case ACTION_REDIRECT: | |
2171 | nh.vrf_id = api->actions[i].u.redirect_vrf; | |
2172 | nh.type = NEXTHOP_TYPE_IPV4; | |
da3fa383 PG |
2173 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, |
2174 | &bpf, &bpof, | |
2175 | &nh, &rate); | |
d114b0d7 PG |
2176 | continue_loop = 0; |
2177 | break; | |
2178 | case ACTION_MARKING: | |
ac7c35f8 | 2179 | if (BGP_DEBUG(pbr, PBR)) { |
d114b0d7 | 2180 | bgp_pbr_print_policy_route(api); |
ac7c35f8 PG |
2181 | zlog_warn("PBR: Set DSCP %u Ignored", |
2182 | api->actions[i].u.marking_dscp); | |
2183 | } | |
d114b0d7 PG |
2184 | break; |
2185 | default: | |
2186 | break; | |
2187 | } | |
2188 | if (continue_loop == 0) | |
2189 | break; | |
2190 | } | |
2191 | } | |
2192 | ||
45918cfb PG |
2193 | void bgp_pbr_update_entry(struct bgp *bgp, struct prefix *p, |
2194 | struct bgp_info *info, afi_t afi, safi_t safi, | |
2195 | bool nlri_update) | |
2196 | { | |
2197 | struct bgp_pbr_entry_main api; | |
6818e7e5 | 2198 | struct bgp_info_extra *extra = bgp_info_extra_get(info); |
45918cfb PG |
2199 | |
2200 | if (afi == AFI_IP6) | |
2201 | return; /* IPv6 not supported */ | |
2202 | if (safi != SAFI_FLOWSPEC) | |
2203 | return; /* not supported */ | |
2204 | /* Make Zebra API structure. */ | |
2205 | memset(&api, 0, sizeof(api)); | |
2206 | api.vrf_id = bgp->vrf_id; | |
2207 | api.afi = afi; | |
2208 | ||
6818e7e5 | 2209 | if (!bgp_zebra_tm_chunk_obtained()) { |
f146bb54 | 2210 | if (BGP_DEBUG(pbr, PBR_ERROR)) |
6818e7e5 | 2211 | zlog_err("%s: table chunk not obtained yet", |
f146bb54 | 2212 | __func__); |
6818e7e5 PG |
2213 | return; |
2214 | } | |
2215 | /* already installed */ | |
2216 | if (nlri_update && extra->bgp_fs_pbr) { | |
2217 | if (BGP_DEBUG(pbr, PBR_ERROR)) | |
2218 | zlog_err("%s: entry %p already installed in bgp pbr", | |
2219 | __func__, info); | |
2220 | return; | |
2221 | } | |
2222 | ||
2223 | if (bgp_pbr_build_and_validate_entry(p, info, &api) < 0) { | |
2224 | if (BGP_DEBUG(pbr, PBR_ERROR)) | |
2225 | zlog_err("%s: cancel updating entry %p in bgp pbr", | |
2226 | __func__, info); | |
45918cfb PG |
2227 | return; |
2228 | } | |
d114b0d7 | 2229 | bgp_pbr_handle_entry(bgp, info, &api, nlri_update); |
45918cfb | 2230 | } |
4762c213 PG |
2231 | |
2232 | int bgp_pbr_interface_compare(const struct bgp_pbr_interface *a, | |
2233 | const struct bgp_pbr_interface *b) | |
2234 | { | |
2235 | return strcmp(a->name, b->name); | |
2236 | } | |
2237 | ||
2238 | struct bgp_pbr_interface *bgp_pbr_interface_lookup(const char *name, | |
2239 | struct bgp_pbr_interface_head *head) | |
2240 | { | |
2241 | struct bgp_pbr_interface pbr_if; | |
2242 | ||
2243 | strlcpy(pbr_if.name, name, sizeof(pbr_if.name)); | |
2244 | return (RB_FIND(bgp_pbr_interface_head, | |
2245 | head, &pbr_if)); | |
2246 | } | |
2247 | ||
2248 | /* this function resets to the default policy routing | |
2249 | * go back to default status | |
2250 | */ | |
2251 | void bgp_pbr_reset(struct bgp *bgp, afi_t afi) | |
2252 | { | |
2253 | struct bgp_pbr_config *bgp_pbr_cfg = bgp->bgp_pbr_cfg; | |
2254 | struct bgp_pbr_interface_head *head; | |
2255 | struct bgp_pbr_interface *pbr_if; | |
2256 | ||
2257 | if (!bgp_pbr_cfg || afi != AFI_IP) | |
2258 | return; | |
2259 | head = &(bgp_pbr_cfg->ifaces_by_name_ipv4); | |
2260 | ||
2261 | while (!RB_EMPTY(bgp_pbr_interface_head, head)) { | |
2262 | pbr_if = RB_ROOT(bgp_pbr_interface_head, head); | |
2263 | RB_REMOVE(bgp_pbr_interface_head, head, pbr_if); | |
2264 | XFREE(MTYPE_TMP, pbr_if); | |
2265 | } | |
2266 | } |