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8046aadf 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" | |
34d44f18 | 23 | #include "jhash.h" |
7b2c7313 | 24 | #include "pbr.h" |
8046aadf | 25 | |
34d44f18 | 26 | #include "bgpd/bgpd.h" |
8046aadf | 27 | #include "bgpd/bgp_pbr.h" |
16239153 | 28 | #include "bgpd/bgp_debug.h" |
2749b788 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" | |
ed132710 | 33 | #include "bgpd/bgp_zebra.h" |
0a3eeab8 | 34 | #include "bgpd/bgp_mplsvpn.h" |
ed132710 PG |
35 | |
36 | DEFINE_MTYPE_STATIC(BGPD, PBR_MATCH_ENTRY, "PBR match entry") | |
37 | DEFINE_MTYPE_STATIC(BGPD, PBR_MATCH, "PBR match") | |
38 | DEFINE_MTYPE_STATIC(BGPD, PBR_ACTION, "PBR action") | |
aa97cd11 | 39 | DEFINE_MTYPE_STATIC(BGPD, PBR, "BGP PBR Context") |
6d47669a | 40 | DEFINE_MTYPE_STATIC(BGPD, PBR_VALMASK, "BGP PBR Val Mask Value") |
aa97cd11 PG |
41 | |
42 | RB_GENERATE(bgp_pbr_interface_head, bgp_pbr_interface, | |
43 | id_entry, bgp_pbr_interface_compare); | |
44 | struct bgp_pbr_interface_head ifaces_by_name_ipv4 = | |
45 | RB_INITIALIZER(&ifaces_by_name_ipv4); | |
ed132710 PG |
46 | |
47 | static int bgp_pbr_match_counter_unique; | |
48 | static int bgp_pbr_match_entry_counter_unique; | |
49 | static int bgp_pbr_action_counter_unique; | |
50 | static int bgp_pbr_match_iptable_counter_unique; | |
16239153 | 51 | |
4c793038 PG |
52 | struct bgp_pbr_match_iptable_unique { |
53 | uint32_t unique; | |
54 | struct bgp_pbr_match *bpm_found; | |
55 | }; | |
56 | ||
5bbc648d PG |
57 | struct bgp_pbr_match_entry_unique { |
58 | uint32_t unique; | |
59 | struct bgp_pbr_match_entry *bpme_found; | |
60 | }; | |
61 | ||
2055c776 PG |
62 | struct bgp_pbr_action_unique { |
63 | uint32_t unique; | |
64 | struct bgp_pbr_action *bpa_found; | |
65 | }; | |
66 | ||
67 | static int bgp_pbr_action_walkcb(struct hash_backet *backet, void *arg) | |
68 | { | |
69 | struct bgp_pbr_action *bpa = (struct bgp_pbr_action *)backet->data; | |
70 | struct bgp_pbr_action_unique *bpau = (struct bgp_pbr_action_unique *) | |
71 | arg; | |
72 | uint32_t unique = bpau->unique; | |
73 | ||
74 | if (bpa->unique == unique) { | |
75 | bpau->bpa_found = bpa; | |
76 | return HASHWALK_ABORT; | |
77 | } | |
78 | return HASHWALK_CONTINUE; | |
79 | } | |
80 | ||
5bbc648d PG |
81 | static int bgp_pbr_match_entry_walkcb(struct hash_backet *backet, void *arg) |
82 | { | |
83 | struct bgp_pbr_match_entry *bpme = | |
84 | (struct bgp_pbr_match_entry *)backet->data; | |
85 | struct bgp_pbr_match_entry_unique *bpmeu = | |
86 | (struct bgp_pbr_match_entry_unique *)arg; | |
87 | uint32_t unique = bpmeu->unique; | |
88 | ||
89 | if (bpme->unique == unique) { | |
90 | bpmeu->bpme_found = bpme; | |
91 | return HASHWALK_ABORT; | |
92 | } | |
93 | return HASHWALK_CONTINUE; | |
94 | } | |
95 | ||
96 | struct bgp_pbr_match_ipsetname { | |
97 | char *ipsetname; | |
98 | struct bgp_pbr_match *bpm_found; | |
99 | }; | |
100 | ||
101 | static int bgp_pbr_match_pername_walkcb(struct hash_backet *backet, void *arg) | |
102 | { | |
103 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
104 | struct bgp_pbr_match_ipsetname *bpmi = | |
105 | (struct bgp_pbr_match_ipsetname *)arg; | |
106 | char *ipset_name = bpmi->ipsetname; | |
107 | ||
108 | if (!strncmp(ipset_name, bpm->ipset_name, | |
109 | ZEBRA_IPSET_NAME_SIZE)) { | |
110 | bpmi->bpm_found = bpm; | |
111 | return HASHWALK_ABORT; | |
112 | } | |
113 | return HASHWALK_CONTINUE; | |
114 | } | |
115 | ||
4c793038 PG |
116 | static int bgp_pbr_match_iptable_walkcb(struct hash_backet *backet, void *arg) |
117 | { | |
118 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
119 | struct bgp_pbr_match_iptable_unique *bpmiu = | |
120 | (struct bgp_pbr_match_iptable_unique *)arg; | |
121 | uint32_t unique = bpmiu->unique; | |
122 | ||
123 | if (bpm->unique2 == unique) { | |
124 | bpmiu->bpm_found = bpm; | |
125 | return HASHWALK_ABORT; | |
126 | } | |
127 | return HASHWALK_CONTINUE; | |
128 | } | |
129 | ||
5bbc648d PG |
130 | struct bgp_pbr_match_unique { |
131 | uint32_t unique; | |
132 | struct bgp_pbr_match *bpm_found; | |
133 | }; | |
134 | ||
135 | static int bgp_pbr_match_walkcb(struct hash_backet *backet, void *arg) | |
136 | { | |
137 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
138 | struct bgp_pbr_match_unique *bpmu = (struct bgp_pbr_match_unique *) | |
139 | arg; | |
140 | uint32_t unique = bpmu->unique; | |
141 | ||
142 | if (bpm->unique == unique) { | |
143 | bpmu->bpm_found = bpm; | |
144 | return HASHWALK_ABORT; | |
145 | } | |
146 | return HASHWALK_CONTINUE; | |
147 | } | |
148 | ||
16239153 PG |
149 | static int sprintf_bgp_pbr_match_val(char *str, struct bgp_pbr_match_val *mval, |
150 | const char *prepend) | |
151 | { | |
152 | char *ptr = str; | |
153 | ||
154 | if (prepend) | |
155 | ptr += sprintf(ptr, "%s", prepend); | |
156 | else { | |
157 | if (mval->unary_operator & OPERATOR_UNARY_OR) | |
158 | ptr += sprintf(ptr, ", or "); | |
159 | if (mval->unary_operator & OPERATOR_UNARY_AND) | |
160 | ptr += sprintf(ptr, ", and "); | |
161 | } | |
162 | if (mval->compare_operator & OPERATOR_COMPARE_LESS_THAN) | |
163 | ptr += sprintf(ptr, "<"); | |
164 | if (mval->compare_operator & OPERATOR_COMPARE_GREATER_THAN) | |
165 | ptr += sprintf(ptr, ">"); | |
166 | if (mval->compare_operator & OPERATOR_COMPARE_EQUAL_TO) | |
167 | ptr += sprintf(ptr, "="); | |
168 | if (mval->compare_operator & OPERATOR_COMPARE_EXACT_MATCH) | |
169 | ptr += sprintf(ptr, "match"); | |
170 | ptr += sprintf(ptr, " %u", mval->value); | |
171 | return (int)(ptr - str); | |
172 | } | |
173 | ||
174 | #define INCREMENT_DISPLAY(_ptr, _cnt) do { \ | |
175 | if (_cnt) \ | |
176 | (_ptr) += sprintf((_ptr), "; "); \ | |
177 | _cnt++; \ | |
178 | } while (0) | |
179 | ||
db237932 PG |
180 | /* this structure can be used for port range, |
181 | * but also for other values range like packet length range | |
182 | */ | |
9353fe4e PG |
183 | struct bgp_pbr_range_port { |
184 | uint16_t min_port; | |
185 | uint16_t max_port; | |
186 | }; | |
187 | ||
d9e37996 PG |
188 | /* this structure can be used to filter with a mask |
189 | * for instance it supports not instructions like for | |
190 | * tcpflags | |
191 | */ | |
192 | struct bgp_pbr_val_mask { | |
193 | uint16_t val; | |
194 | uint16_t mask; | |
195 | }; | |
196 | ||
db237932 PG |
197 | /* this structure is used to pass instructs |
198 | * so that BGP can create pbr instructions to ZEBRA | |
199 | */ | |
200 | struct bgp_pbr_filter { | |
201 | vrf_id_t vrf_id; | |
202 | struct prefix *src; | |
203 | struct prefix *dst; | |
204 | uint8_t protocol; | |
205 | struct bgp_pbr_range_port *pkt_len; | |
206 | struct bgp_pbr_range_port *src_port; | |
207 | struct bgp_pbr_range_port *dst_port; | |
d9e37996 | 208 | struct bgp_pbr_val_mask *tcp_flags; |
d7e3bf1b | 209 | struct bgp_pbr_val_mask *dscp; |
db237932 PG |
210 | }; |
211 | ||
fd36d122 PG |
212 | /* this structure is used to contain OR instructions |
213 | * so that BGP can create multiple pbr instructions | |
214 | * to ZEBRA | |
215 | */ | |
216 | struct bgp_pbr_or_filter { | |
217 | struct list *tcpflags; | |
218 | }; | |
219 | ||
d9e37996 PG |
220 | /* TCP : FIN and SYN -> val = ALL; mask = 3 |
221 | * TCP : not (FIN and SYN) -> val = ALL; mask = ALL & ~(FIN|RST) | |
222 | */ | |
6d47669a PG |
223 | static bool bgp_pbr_extract_enumerate_unary(struct bgp_pbr_match_val list[], |
224 | int num, uint8_t unary_operator, | |
225 | void *valmask) | |
3b705172 PG |
226 | { |
227 | int i = 0; | |
6d47669a PG |
228 | struct bgp_pbr_val_mask *and_valmask = NULL; |
229 | struct list *or_valmask = NULL; | |
3b705172 | 230 | |
6d47669a PG |
231 | if (valmask) { |
232 | if (unary_operator == OPERATOR_UNARY_AND) { | |
233 | and_valmask = (struct bgp_pbr_val_mask *)valmask; | |
234 | memset(and_valmask, 0, sizeof(struct bgp_pbr_val_mask)); | |
235 | } else if (unary_operator == OPERATOR_UNARY_OR) { | |
236 | or_valmask = (struct list *)valmask; | |
237 | } | |
238 | } | |
3b705172 | 239 | for (i = 0; i < num; i++) { |
d9e37996 PG |
240 | if (i != 0 && list[i].unary_operator != |
241 | unary_operator) | |
3b705172 | 242 | return false; |
d9e37996 PG |
243 | if (!(list[i].compare_operator & |
244 | OPERATOR_COMPARE_EQUAL_TO) && | |
245 | !(list[i].compare_operator & | |
246 | OPERATOR_COMPARE_EXACT_MATCH)) { | |
247 | if ((list[i].compare_operator & | |
248 | OPERATOR_COMPARE_LESS_THAN) && | |
249 | (list[i].compare_operator & | |
250 | OPERATOR_COMPARE_GREATER_THAN)) { | |
6d47669a PG |
251 | if (unary_operator == OPERATOR_UNARY_AND && and_valmask) |
252 | and_valmask->mask |= | |
253 | TCP_HEADER_ALL_FLAGS & | |
254 | ~(list[i].value); | |
255 | else if (unary_operator == OPERATOR_UNARY_OR && or_valmask) { | |
256 | and_valmask = XCALLOC(MTYPE_PBR_VALMASK, | |
257 | sizeof(struct bgp_pbr_val_mask)); | |
258 | and_valmask->val = TCP_HEADER_ALL_FLAGS; | |
259 | and_valmask->mask |= | |
d9e37996 PG |
260 | TCP_HEADER_ALL_FLAGS & |
261 | ~(list[i].value); | |
6d47669a PG |
262 | listnode_add (or_valmask, and_valmask); |
263 | } | |
d9e37996 PG |
264 | continue; |
265 | } | |
266 | return false; | |
267 | } | |
6d47669a PG |
268 | if (unary_operator == OPERATOR_UNARY_AND && and_valmask) |
269 | and_valmask->mask |= | |
270 | TCP_HEADER_ALL_FLAGS & list[i].value; | |
271 | else if (unary_operator == OPERATOR_UNARY_OR && or_valmask) { | |
272 | and_valmask = XCALLOC(MTYPE_PBR_VALMASK, | |
273 | sizeof(struct bgp_pbr_val_mask)); | |
274 | and_valmask->val = TCP_HEADER_ALL_FLAGS; | |
275 | and_valmask->mask |= | |
276 | TCP_HEADER_ALL_FLAGS & list[i].value; | |
277 | listnode_add(or_valmask, and_valmask); | |
278 | } | |
3b705172 | 279 | } |
6d47669a PG |
280 | if (unary_operator == OPERATOR_UNARY_AND && and_valmask) |
281 | and_valmask->mask = TCP_HEADER_ALL_FLAGS; | |
3b705172 PG |
282 | return true; |
283 | } | |
284 | ||
6d47669a PG |
285 | /* if unary operator can either be UNARY_OR/AND/OR-AND. |
286 | * in the latter case, combinationf of both is not handled | |
287 | */ | |
288 | static bool bgp_pbr_extract_enumerate(struct bgp_pbr_match_val list[], | |
289 | int num, uint8_t unary_operator, | |
290 | void *valmask) | |
291 | { | |
292 | bool ret; | |
293 | uint8_t unary_operator_val; | |
294 | bool double_check = false; | |
295 | ||
296 | if ((unary_operator & OPERATOR_UNARY_OR) && | |
297 | (unary_operator & OPERATOR_UNARY_AND)) { | |
298 | unary_operator_val = OPERATOR_UNARY_AND; | |
299 | double_check = true; | |
300 | } else | |
301 | unary_operator_val = unary_operator; | |
302 | ret = bgp_pbr_extract_enumerate_unary(list, num, unary_operator_val, | |
303 | valmask); | |
304 | if (!ret && double_check) | |
305 | ret = bgp_pbr_extract_enumerate_unary(list, num, | |
306 | OPERATOR_UNARY_OR, | |
307 | valmask); | |
308 | return ret; | |
309 | } | |
310 | ||
311 | /* returns the unary operator that is in the list | |
312 | * return 0 if both operators are used | |
313 | */ | |
314 | static uint8_t bgp_pbr_match_val_get_operator(struct bgp_pbr_match_val list[], | |
315 | int num) | |
316 | ||
317 | { | |
318 | int i; | |
319 | uint8_t unary_operator = OPERATOR_UNARY_AND; | |
320 | ||
321 | for (i = 0; i < num; i++) { | |
322 | if (i == 0) | |
323 | continue; | |
324 | if (list[i].unary_operator & OPERATOR_UNARY_OR) | |
325 | unary_operator = OPERATOR_UNARY_OR; | |
326 | if ((list[i].unary_operator & OPERATOR_UNARY_AND | |
327 | && unary_operator == OPERATOR_UNARY_OR) || | |
328 | (list[i].unary_operator & OPERATOR_UNARY_OR | |
329 | && unary_operator == OPERATOR_UNARY_AND)) | |
330 | return 0; | |
331 | } | |
332 | return unary_operator; | |
333 | } | |
334 | ||
335 | ||
9353fe4e PG |
336 | /* return true if extraction ok |
337 | */ | |
338 | static bool bgp_pbr_extract(struct bgp_pbr_match_val list[], | |
339 | int num, | |
340 | struct bgp_pbr_range_port *range) | |
341 | { | |
342 | int i = 0; | |
343 | bool exact_match = false; | |
344 | ||
345 | if (range) | |
346 | memset(range, 0, sizeof(struct bgp_pbr_range_port)); | |
347 | ||
348 | if (num > 2) | |
349 | return false; | |
350 | for (i = 0; i < num; i++) { | |
351 | if (i != 0 && (list[i].compare_operator == | |
352 | OPERATOR_COMPARE_EQUAL_TO)) | |
353 | return false; | |
354 | if (i == 0 && (list[i].compare_operator == | |
355 | OPERATOR_COMPARE_EQUAL_TO)) { | |
356 | if (range) | |
357 | range->min_port = list[i].value; | |
358 | exact_match = true; | |
359 | } | |
360 | if (exact_match == true && i > 0) | |
361 | return false; | |
362 | if (list[i].compare_operator == | |
363 | (OPERATOR_COMPARE_GREATER_THAN + | |
364 | OPERATOR_COMPARE_EQUAL_TO)) { | |
365 | if (range) | |
366 | range->min_port = list[i].value; | |
367 | } else if (list[i].compare_operator == | |
368 | (OPERATOR_COMPARE_LESS_THAN + | |
369 | OPERATOR_COMPARE_EQUAL_TO)) { | |
370 | if (range) | |
371 | range->max_port = list[i].value; | |
372 | } else if (list[i].compare_operator == | |
373 | OPERATOR_COMPARE_LESS_THAN) { | |
374 | if (range) | |
375 | range->max_port = list[i].value - 1; | |
376 | } else if (list[i].compare_operator == | |
377 | OPERATOR_COMPARE_GREATER_THAN) { | |
378 | if (range) | |
379 | range->min_port = list[i].value + 1; | |
380 | } | |
381 | } | |
382 | return true; | |
383 | } | |
384 | ||
16239153 PG |
385 | static int bgp_pbr_validate_policy_route(struct bgp_pbr_entry_main *api) |
386 | { | |
3b705172 PG |
387 | bool enumerate_icmp = false; |
388 | ||
16239153 PG |
389 | /* because bgp pbr entry may contain unsupported |
390 | * combinations, a message will be displayed here if | |
391 | * not supported. | |
392 | * for now, only match/set supported is | |
393 | * - combination src/dst => redirect nexthop [ + rate] | |
394 | * - combination src/dst => redirect VRF [ + rate] | |
395 | * - combination src/dst => drop | |
9353fe4e | 396 | * - combination srcport + @IP |
16239153 | 397 | */ |
9353fe4e PG |
398 | if (api->match_protocol_num > 1) { |
399 | if (BGP_DEBUG(pbr, PBR)) | |
400 | zlog_debug("BGP: match protocol operations:" | |
401 | "multiple protocols ( %d). ignoring.", | |
402 | api->match_protocol_num); | |
403 | return 0; | |
404 | } | |
405 | if (api->match_protocol_num == 1 && | |
406 | api->protocol[0].value != PROTOCOL_UDP && | |
3b705172 | 407 | api->protocol[0].value != PROTOCOL_ICMP && |
9353fe4e PG |
408 | api->protocol[0].value != PROTOCOL_TCP) { |
409 | if (BGP_DEBUG(pbr, PBR)) | |
410 | zlog_debug("BGP: match protocol operations:" | |
411 | "protocol (%d) not supported. ignoring", | |
412 | api->match_protocol_num); | |
413 | return 0; | |
414 | } | |
415 | if (!bgp_pbr_extract(api->src_port, api->match_src_port_num, NULL)) { | |
416 | if (BGP_DEBUG(pbr, PBR)) | |
417 | zlog_debug("BGP: match src port operations:" | |
418 | "too complex. ignoring."); | |
419 | return 0; | |
420 | } | |
421 | if (!bgp_pbr_extract(api->dst_port, api->match_dst_port_num, NULL)) { | |
422 | if (BGP_DEBUG(pbr, PBR)) | |
423 | zlog_debug("BGP: match dst port operations:" | |
424 | "too complex. ignoring."); | |
425 | return 0; | |
426 | } | |
d9e37996 PG |
427 | if (!bgp_pbr_extract_enumerate(api->tcpflags, |
428 | api->match_tcpflags_num, | |
fd36d122 PG |
429 | OPERATOR_UNARY_AND | |
430 | OPERATOR_UNARY_OR, NULL)) { | |
d9e37996 PG |
431 | if (BGP_DEBUG(pbr, PBR)) |
432 | zlog_debug("BGP: match tcp flags:" | |
433 | "too complex. ignoring."); | |
434 | return 0; | |
435 | } | |
3b705172 PG |
436 | if (!bgp_pbr_extract(api->icmp_type, api->match_icmp_type_num, NULL)) { |
437 | if (!bgp_pbr_extract_enumerate(api->icmp_type, | |
d9e37996 PG |
438 | api->match_icmp_type_num, |
439 | OPERATOR_UNARY_OR, NULL)) { | |
3b705172 PG |
440 | if (BGP_DEBUG(pbr, PBR)) |
441 | zlog_debug("BGP: match icmp type operations:" | |
442 | "too complex. ignoring."); | |
443 | return 0; | |
444 | } | |
445 | enumerate_icmp = true; | |
446 | } | |
447 | if (!bgp_pbr_extract(api->icmp_code, api->match_icmp_code_num, NULL)) { | |
448 | if (!bgp_pbr_extract_enumerate(api->icmp_code, | |
d9e37996 PG |
449 | api->match_icmp_code_num, |
450 | OPERATOR_UNARY_OR, NULL)) { | |
3b705172 PG |
451 | if (BGP_DEBUG(pbr, PBR)) |
452 | zlog_debug("BGP: match icmp code operations:" | |
453 | "too complex. ignoring."); | |
454 | return 0; | |
455 | } else if (api->match_icmp_type_num > 1 && | |
456 | enumerate_icmp == false) { | |
457 | if (BGP_DEBUG(pbr, PBR)) | |
458 | zlog_debug("BGP: match icmp code is enumerate" | |
459 | ", and icmp type is not." | |
460 | " too complex. ignoring."); | |
461 | return 0; | |
462 | } | |
463 | } | |
9353fe4e PG |
464 | if (!bgp_pbr_extract(api->port, api->match_port_num, NULL)) { |
465 | if (BGP_DEBUG(pbr, PBR)) | |
466 | zlog_debug("BGP: match port operations:" | |
467 | "too complex. ignoring."); | |
468 | return 0; | |
469 | } | |
c0b8c1ab PG |
470 | if (!bgp_pbr_extract(api->packet_length, api->match_packet_length_num, NULL)) { |
471 | if (BGP_DEBUG(pbr, PBR)) | |
472 | zlog_debug("BGP: match packet length operations:" | |
473 | "too complex. ignoring."); | |
474 | return 0; | |
475 | } | |
d7e3bf1b PG |
476 | if (api->match_dscp_num > 1 || |
477 | !bgp_pbr_extract_enumerate(api->dscp, | |
478 | api->match_dscp_num, | |
479 | OPERATOR_UNARY_OR, NULL)) { | |
480 | if (BGP_DEBUG(pbr, PBR)) | |
481 | zlog_debug("BGP: match DSCP operations:" | |
482 | "too complex. ignoring."); | |
483 | return 0; | |
484 | } | |
9353fe4e PG |
485 | /* no combinations with both src_port and dst_port |
486 | * or port with src_port and dst_port | |
487 | */ | |
488 | if (api->match_src_port_num + api->match_dst_port_num + | |
489 | api->match_port_num > 3) { | |
490 | if (BGP_DEBUG(pbr, PBR)) | |
491 | zlog_debug("BGP: match multiple port operations:" | |
492 | " too complex. ignoring."); | |
493 | return 0; | |
494 | } | |
3b705172 PG |
495 | if ((api->match_src_port_num || api->match_dst_port_num |
496 | || api->match_port_num) && (api->match_icmp_type_num | |
497 | || api->match_icmp_code_num)) { | |
498 | if (BGP_DEBUG(pbr, PBR)) | |
499 | zlog_debug("BGP: match multiple port/imcp operations:" | |
500 | " too complex. ignoring."); | |
501 | return 0; | |
502 | } | |
16239153 PG |
503 | if (!(api->match_bitmask & PREFIX_SRC_PRESENT) && |
504 | !(api->match_bitmask & PREFIX_DST_PRESENT)) { | |
aeb8f086 | 505 | if (BGP_DEBUG(pbr, PBR)) { |
16239153 | 506 | bgp_pbr_print_policy_route(api); |
aeb8f086 PG |
507 | zlog_debug("BGP: match actions without src" |
508 | " or dst address can not operate." | |
509 | " ignoring."); | |
510 | } | |
16239153 PG |
511 | return 0; |
512 | } | |
513 | return 1; | |
514 | } | |
8046aadf | 515 | |
2749b788 PG |
516 | /* return -1 if build or validation failed */ |
517 | static int bgp_pbr_build_and_validate_entry(struct prefix *p, | |
518 | struct bgp_info *info, | |
519 | struct bgp_pbr_entry_main *api) | |
520 | { | |
521 | int ret; | |
522 | int i, action_count = 0; | |
523 | struct ecommunity *ecom; | |
524 | struct ecommunity_val *ecom_eval; | |
525 | struct bgp_pbr_entry_action *api_action; | |
526 | struct prefix *src = NULL, *dst = NULL; | |
527 | int valid_prefix = 0; | |
528 | afi_t afi = AFI_IP; | |
529 | ||
530 | /* extract match from flowspec entries */ | |
531 | ret = bgp_flowspec_match_rules_fill((uint8_t *)p->u.prefix_flowspec.ptr, | |
532 | p->u.prefix_flowspec.prefixlen, api); | |
533 | if (ret < 0) | |
534 | return -1; | |
535 | /* extract actiosn from flowspec ecom list */ | |
536 | if (info && info->attr && info->attr->ecommunity) { | |
537 | ecom = info->attr->ecommunity; | |
538 | for (i = 0; i < ecom->size; i++) { | |
539 | ecom_eval = (struct ecommunity_val *) | |
d15b0836 PG |
540 | (ecom->val + (i * ECOMMUNITY_SIZE)); |
541 | action_count++; | |
2749b788 | 542 | if (action_count > ACTIONS_MAX_NUM) { |
060eadea PG |
543 | if (BGP_DEBUG(pbr, PBR_ERROR)) |
544 | zlog_err("%s: flowspec actions exceeds limit (max %u)", | |
545 | __func__, action_count); | |
2749b788 PG |
546 | break; |
547 | } | |
d15b0836 | 548 | api_action = &api->actions[action_count - 1]; |
2749b788 PG |
549 | |
550 | if ((ecom_eval->val[1] == | |
551 | (char)ECOMMUNITY_REDIRECT_VRF) && | |
552 | (ecom_eval->val[0] == | |
553 | (char)ECOMMUNITY_ENCODE_TRANS_EXP || | |
554 | ecom_eval->val[0] == | |
555 | (char)ECOMMUNITY_EXTENDED_COMMUNITY_PART_2 || | |
556 | ecom_eval->val[0] == | |
557 | (char)ECOMMUNITY_EXTENDED_COMMUNITY_PART_3)) { | |
558 | struct ecommunity *eckey = ecommunity_new(); | |
559 | struct ecommunity_val ecom_copy; | |
560 | ||
561 | memcpy(&ecom_copy, ecom_eval, | |
562 | sizeof(struct ecommunity_val)); | |
563 | ecom_copy.val[0] &= | |
564 | ~ECOMMUNITY_ENCODE_TRANS_EXP; | |
565 | ecom_copy.val[1] = ECOMMUNITY_ROUTE_TARGET; | |
566 | ecommunity_add_val(eckey, &ecom_copy); | |
567 | ||
568 | api_action->action = ACTION_REDIRECT; | |
569 | api_action->u.redirect_vrf = | |
570 | get_first_vrf_for_redirect_with_rt( | |
571 | eckey); | |
572 | ecommunity_free(&eckey); | |
573 | } else if ((ecom_eval->val[0] == | |
574 | (char)ECOMMUNITY_ENCODE_REDIRECT_IP_NH) && | |
575 | (ecom_eval->val[1] == | |
576 | (char)ECOMMUNITY_REDIRECT_IP_NH)) { | |
577 | api_action->action = ACTION_REDIRECT_IP; | |
578 | api_action->u.zr.redirect_ip_v4.s_addr = | |
579 | info->attr->nexthop.s_addr; | |
580 | api_action->u.zr.duplicate = ecom_eval->val[7]; | |
581 | } else { | |
582 | if (ecom_eval->val[0] != | |
583 | (char)ECOMMUNITY_ENCODE_TRANS_EXP) | |
584 | continue; | |
585 | ret = ecommunity_fill_pbr_action(ecom_eval, | |
586 | api_action); | |
587 | if (ret != 0) | |
588 | continue; | |
589 | } | |
590 | api->action_num++; | |
591 | } | |
592 | } | |
593 | ||
594 | /* validate if incoming matc/action is compatible | |
595 | * with our policy routing engine | |
596 | */ | |
597 | if (!bgp_pbr_validate_policy_route(api)) | |
598 | return -1; | |
599 | ||
600 | /* check inconsistency in the match rule */ | |
601 | if (api->match_bitmask & PREFIX_SRC_PRESENT) { | |
602 | src = &api->src_prefix; | |
603 | afi = family2afi(src->family); | |
604 | valid_prefix = 1; | |
605 | } | |
606 | if (api->match_bitmask & PREFIX_DST_PRESENT) { | |
607 | dst = &api->dst_prefix; | |
608 | if (valid_prefix && afi != family2afi(dst->family)) { | |
aeb8f086 | 609 | if (BGP_DEBUG(pbr, PBR)) { |
2749b788 | 610 | bgp_pbr_print_policy_route(api); |
aeb8f086 PG |
611 | zlog_debug("%s: inconsistency:" |
612 | " no match for afi src and dst (%u/%u)", | |
613 | __func__, afi, family2afi(dst->family)); | |
614 | } | |
2749b788 PG |
615 | return -1; |
616 | } | |
617 | } | |
618 | return 0; | |
619 | } | |
620 | ||
317a239f PG |
621 | static void bgp_pbr_match_entry_free(void *arg) |
622 | { | |
623 | struct bgp_pbr_match_entry *bpme; | |
624 | ||
625 | bpme = (struct bgp_pbr_match_entry *)arg; | |
626 | ||
627 | if (bpme->installed) { | |
628 | bgp_send_pbr_ipset_entry_match(bpme, false); | |
629 | bpme->installed = false; | |
630 | bpme->backpointer = NULL; | |
631 | } | |
632 | XFREE(MTYPE_PBR_MATCH_ENTRY, bpme); | |
633 | } | |
634 | ||
635 | static void bgp_pbr_match_free(void *arg) | |
636 | { | |
637 | struct bgp_pbr_match *bpm; | |
638 | ||
639 | bpm = (struct bgp_pbr_match *)arg; | |
640 | ||
641 | hash_clean(bpm->entry_hash, bgp_pbr_match_entry_free); | |
642 | ||
643 | if (hashcount(bpm->entry_hash) == 0) { | |
644 | /* delete iptable entry first */ | |
645 | /* then delete ipset match */ | |
646 | if (bpm->installed) { | |
647 | if (bpm->installed_in_iptable) { | |
648 | bgp_send_pbr_iptable(bpm->action, | |
649 | bpm, false); | |
650 | bpm->installed_in_iptable = false; | |
651 | bpm->action->refcnt--; | |
652 | } | |
653 | bgp_send_pbr_ipset_match(bpm, false); | |
654 | bpm->installed = false; | |
655 | bpm->action = NULL; | |
656 | } | |
657 | } | |
658 | hash_free(bpm->entry_hash); | |
659 | ||
660 | XFREE(MTYPE_PBR_MATCH, bpm); | |
661 | } | |
662 | ||
ed132710 PG |
663 | static void *bgp_pbr_match_alloc_intern(void *arg) |
664 | { | |
665 | struct bgp_pbr_match *bpm, *new; | |
666 | ||
667 | bpm = (struct bgp_pbr_match *)arg; | |
668 | ||
669 | new = XCALLOC(MTYPE_PBR_MATCH, sizeof(*new)); | |
670 | memcpy(new, bpm, sizeof(*bpm)); | |
671 | ||
672 | return new; | |
673 | } | |
674 | ||
317a239f PG |
675 | static void bgp_pbr_action_free(void *arg) |
676 | { | |
677 | struct bgp_pbr_action *bpa; | |
678 | ||
679 | bpa = (struct bgp_pbr_action *)arg; | |
680 | ||
681 | if (bpa->refcnt == 0) { | |
682 | if (bpa->installed && bpa->table_id != 0) { | |
683 | bgp_send_pbr_rule_action(bpa, false); | |
684 | bgp_zebra_announce_default(bpa->bgp, &(bpa->nh), | |
685 | AFI_IP, | |
686 | bpa->table_id, | |
687 | false); | |
e195a297 | 688 | bpa->installed = false; |
317a239f PG |
689 | } |
690 | } | |
691 | XFREE(MTYPE_PBR_ACTION, bpa); | |
692 | } | |
693 | ||
ed132710 PG |
694 | static void *bgp_pbr_action_alloc_intern(void *arg) |
695 | { | |
696 | struct bgp_pbr_action *bpa, *new; | |
697 | ||
698 | bpa = (struct bgp_pbr_action *)arg; | |
699 | ||
700 | new = XCALLOC(MTYPE_PBR_ACTION, sizeof(*new)); | |
701 | ||
702 | memcpy(new, bpa, sizeof(*bpa)); | |
703 | ||
704 | return new; | |
705 | } | |
706 | ||
707 | static void *bgp_pbr_match_entry_alloc_intern(void *arg) | |
708 | { | |
709 | struct bgp_pbr_match_entry *bpme, *new; | |
710 | ||
711 | bpme = (struct bgp_pbr_match_entry *)arg; | |
712 | ||
713 | new = XCALLOC(MTYPE_PBR_MATCH_ENTRY, sizeof(*new)); | |
714 | ||
715 | memcpy(new, bpme, sizeof(*bpme)); | |
716 | ||
717 | return new; | |
718 | } | |
719 | ||
34d44f18 PG |
720 | uint32_t bgp_pbr_match_hash_key(void *arg) |
721 | { | |
722 | struct bgp_pbr_match *pbm = (struct bgp_pbr_match *)arg; | |
723 | uint32_t key; | |
724 | ||
725 | key = jhash_1word(pbm->vrf_id, 0x4312abde); | |
726 | key = jhash_1word(pbm->flags, key); | |
c0b8c1ab PG |
727 | key = jhash_1word(pbm->pkt_len_min, key); |
728 | key = jhash_1word(pbm->pkt_len_max, key); | |
d9e37996 PG |
729 | key = jhash_1word(pbm->tcp_flags, key); |
730 | key = jhash_1word(pbm->tcp_mask_flags, key); | |
d7e3bf1b | 731 | key = jhash_1word(pbm->dscp_value, key); |
34d44f18 PG |
732 | return jhash_1word(pbm->type, key); |
733 | } | |
734 | ||
735 | int bgp_pbr_match_hash_equal(const void *arg1, const void *arg2) | |
736 | { | |
737 | const struct bgp_pbr_match *r1, *r2; | |
738 | ||
739 | r1 = (const struct bgp_pbr_match *)arg1; | |
740 | r2 = (const struct bgp_pbr_match *)arg2; | |
741 | ||
742 | if (r1->vrf_id != r2->vrf_id) | |
743 | return 0; | |
744 | ||
745 | if (r1->type != r2->type) | |
746 | return 0; | |
747 | ||
748 | if (r1->flags != r2->flags) | |
749 | return 0; | |
750 | ||
751 | if (r1->action != r2->action) | |
752 | return 0; | |
753 | ||
c0b8c1ab PG |
754 | if (r1->pkt_len_min != r2->pkt_len_min) |
755 | return 0; | |
756 | ||
757 | if (r1->pkt_len_max != r2->pkt_len_max) | |
758 | return 0; | |
759 | ||
d9e37996 PG |
760 | if (r1->tcp_flags != r2->tcp_flags) |
761 | return 0; | |
762 | ||
763 | if (r1->tcp_mask_flags != r2->tcp_mask_flags) | |
764 | return 0; | |
765 | ||
d7e3bf1b PG |
766 | if (r1->dscp_value != r2->dscp_value) |
767 | return 0; | |
34d44f18 PG |
768 | return 1; |
769 | } | |
770 | ||
771 | uint32_t bgp_pbr_match_entry_hash_key(void *arg) | |
772 | { | |
773 | struct bgp_pbr_match_entry *pbme; | |
774 | uint32_t key; | |
775 | ||
776 | pbme = (struct bgp_pbr_match_entry *)arg; | |
777 | key = prefix_hash_key(&pbme->src); | |
778 | key = jhash_1word(prefix_hash_key(&pbme->dst), key); | |
9353fe4e PG |
779 | key = jhash(&pbme->dst_port_min, 2, key); |
780 | key = jhash(&pbme->src_port_min, 2, key); | |
781 | key = jhash(&pbme->dst_port_max, 2, key); | |
782 | key = jhash(&pbme->src_port_max, 2, key); | |
783 | key = jhash(&pbme->proto, 1, key); | |
34d44f18 PG |
784 | |
785 | return key; | |
786 | } | |
787 | ||
788 | int bgp_pbr_match_entry_hash_equal(const void *arg1, const void *arg2) | |
789 | { | |
790 | const struct bgp_pbr_match_entry *r1, *r2; | |
791 | ||
792 | r1 = (const struct bgp_pbr_match_entry *)arg1; | |
793 | r2 = (const struct bgp_pbr_match_entry *)arg2; | |
794 | ||
795 | /* on updates, comparing | |
796 | * backpointer is not necessary | |
797 | */ | |
798 | ||
799 | /* unique value is self calculated | |
800 | */ | |
801 | ||
802 | /* rate is ignored for now | |
803 | */ | |
804 | ||
805 | if (!prefix_same(&r1->src, &r2->src)) | |
806 | return 0; | |
807 | ||
808 | if (!prefix_same(&r1->dst, &r2->dst)) | |
809 | return 0; | |
810 | ||
9353fe4e PG |
811 | if (r1->src_port_min != r2->src_port_min) |
812 | return 0; | |
813 | ||
814 | if (r1->dst_port_min != r2->dst_port_min) | |
815 | return 0; | |
816 | ||
817 | if (r1->src_port_max != r2->src_port_max) | |
818 | return 0; | |
819 | ||
820 | if (r1->dst_port_max != r2->dst_port_max) | |
821 | return 0; | |
822 | ||
823 | if (r1->proto != r2->proto) | |
824 | return 0; | |
825 | ||
34d44f18 PG |
826 | return 1; |
827 | } | |
828 | ||
829 | uint32_t bgp_pbr_action_hash_key(void *arg) | |
830 | { | |
831 | struct bgp_pbr_action *pbra; | |
832 | uint32_t key; | |
833 | ||
834 | pbra = (struct bgp_pbr_action *)arg; | |
835 | key = jhash_1word(pbra->table_id, 0x4312abde); | |
836 | key = jhash_1word(pbra->fwmark, key); | |
837 | return key; | |
838 | } | |
839 | ||
840 | int bgp_pbr_action_hash_equal(const void *arg1, const void *arg2) | |
841 | { | |
842 | const struct bgp_pbr_action *r1, *r2; | |
843 | ||
844 | r1 = (const struct bgp_pbr_action *)arg1; | |
845 | r2 = (const struct bgp_pbr_action *)arg2; | |
846 | ||
847 | /* unique value is self calculated | |
848 | * table and fwmark is self calculated | |
d8be0dbf | 849 | * rate is ignored |
34d44f18 | 850 | */ |
34d44f18 PG |
851 | if (r1->vrf_id != r2->vrf_id) |
852 | return 0; | |
853 | ||
854 | if (memcmp(&r1->nh, &r2->nh, sizeof(struct nexthop))) | |
855 | return 0; | |
856 | return 1; | |
857 | } | |
8046aadf | 858 | |
2055c776 PG |
859 | struct bgp_pbr_action *bgp_pbr_action_rule_lookup(vrf_id_t vrf_id, |
860 | uint32_t unique) | |
8046aadf | 861 | { |
2055c776 PG |
862 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); |
863 | struct bgp_pbr_action_unique bpau; | |
864 | ||
865 | if (!bgp || unique == 0) | |
866 | return NULL; | |
867 | bpau.unique = unique; | |
868 | bpau.bpa_found = NULL; | |
869 | hash_walk(bgp->pbr_action_hash, bgp_pbr_action_walkcb, &bpau); | |
870 | return bpau.bpa_found; | |
8046aadf PG |
871 | } |
872 | ||
873 | struct bgp_pbr_match *bgp_pbr_match_ipset_lookup(vrf_id_t vrf_id, | |
874 | uint32_t unique) | |
875 | { | |
5bbc648d PG |
876 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); |
877 | struct bgp_pbr_match_unique bpmu; | |
878 | ||
879 | if (!bgp || unique == 0) | |
880 | return NULL; | |
881 | bpmu.unique = unique; | |
882 | bpmu.bpm_found = NULL; | |
883 | hash_walk(bgp->pbr_match_hash, bgp_pbr_match_walkcb, &bpmu); | |
884 | return bpmu.bpm_found; | |
8046aadf PG |
885 | } |
886 | ||
887 | struct bgp_pbr_match_entry *bgp_pbr_match_ipset_entry_lookup(vrf_id_t vrf_id, | |
888 | char *ipset_name, | |
889 | uint32_t unique) | |
890 | { | |
5bbc648d PG |
891 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); |
892 | struct bgp_pbr_match_entry_unique bpmeu; | |
893 | struct bgp_pbr_match_ipsetname bpmi; | |
894 | ||
895 | if (!bgp || unique == 0) | |
896 | return NULL; | |
897 | bpmi.ipsetname = XCALLOC(MTYPE_TMP, ZEBRA_IPSET_NAME_SIZE); | |
898 | snprintf(bpmi.ipsetname, ZEBRA_IPSET_NAME_SIZE, "%s", ipset_name); | |
899 | bpmi.bpm_found = NULL; | |
900 | hash_walk(bgp->pbr_match_hash, bgp_pbr_match_pername_walkcb, &bpmi); | |
901 | XFREE(MTYPE_TMP, bpmi.ipsetname); | |
902 | if (!bpmi.bpm_found) | |
903 | return NULL; | |
904 | bpmeu.bpme_found = NULL; | |
905 | bpmeu.unique = unique; | |
906 | hash_walk(bpmi.bpm_found->entry_hash, | |
907 | bgp_pbr_match_entry_walkcb, &bpmeu); | |
908 | return bpmeu.bpme_found; | |
8046aadf PG |
909 | } |
910 | ||
4c793038 PG |
911 | struct bgp_pbr_match *bgp_pbr_match_iptable_lookup(vrf_id_t vrf_id, |
912 | uint32_t unique) | |
913 | { | |
914 | struct bgp *bgp = bgp_lookup_by_vrf_id(vrf_id); | |
915 | struct bgp_pbr_match_iptable_unique bpmiu; | |
916 | ||
917 | if (!bgp || unique == 0) | |
918 | return NULL; | |
919 | bpmiu.unique = unique; | |
920 | bpmiu.bpm_found = NULL; | |
921 | hash_walk(bgp->pbr_match_hash, bgp_pbr_match_iptable_walkcb, &bpmiu); | |
922 | return bpmiu.bpm_found; | |
923 | } | |
924 | ||
317a239f PG |
925 | void bgp_pbr_cleanup(struct bgp *bgp) |
926 | { | |
927 | if (bgp->pbr_match_hash) { | |
928 | hash_clean(bgp->pbr_match_hash, bgp_pbr_match_free); | |
929 | hash_free(bgp->pbr_match_hash); | |
930 | bgp->pbr_match_hash = NULL; | |
931 | } | |
932 | if (bgp->pbr_action_hash) { | |
933 | hash_clean(bgp->pbr_action_hash, bgp_pbr_action_free); | |
934 | hash_free(bgp->pbr_action_hash); | |
935 | bgp->pbr_action_hash = NULL; | |
936 | } | |
aa97cd11 PG |
937 | if (bgp->bgp_pbr_cfg == NULL) |
938 | return; | |
939 | bgp_pbr_reset(bgp, AFI_IP); | |
940 | XFREE(MTYPE_PBR, bgp->bgp_pbr_cfg); | |
941 | bgp->bgp_pbr_cfg = NULL; | |
317a239f PG |
942 | } |
943 | ||
34d44f18 PG |
944 | void bgp_pbr_init(struct bgp *bgp) |
945 | { | |
946 | bgp->pbr_match_hash = | |
947 | hash_create_size(8, bgp_pbr_match_hash_key, | |
948 | bgp_pbr_match_hash_equal, | |
949 | "Match Hash"); | |
950 | bgp->pbr_action_hash = | |
951 | hash_create_size(8, bgp_pbr_action_hash_key, | |
952 | bgp_pbr_action_hash_equal, | |
953 | "Match Hash Entry"); | |
aa97cd11 PG |
954 | |
955 | bgp->bgp_pbr_cfg = XCALLOC(MTYPE_PBR, sizeof(struct bgp_pbr_config)); | |
956 | bgp->bgp_pbr_cfg->pbr_interface_any_ipv4 = true; | |
34d44f18 | 957 | } |
16239153 PG |
958 | |
959 | void bgp_pbr_print_policy_route(struct bgp_pbr_entry_main *api) | |
960 | { | |
961 | int i = 0; | |
962 | char return_string[512]; | |
963 | char *ptr = return_string; | |
964 | char buff[64]; | |
965 | int nb_items = 0; | |
966 | ||
967 | ptr += sprintf(ptr, "MATCH : "); | |
968 | if (api->match_bitmask & PREFIX_SRC_PRESENT) { | |
969 | struct prefix *p = &(api->src_prefix); | |
970 | ||
971 | ptr += sprintf(ptr, "@src %s", prefix2str(p, buff, 64)); | |
972 | INCREMENT_DISPLAY(ptr, nb_items); | |
973 | } | |
974 | if (api->match_bitmask & PREFIX_DST_PRESENT) { | |
975 | struct prefix *p = &(api->dst_prefix); | |
976 | ||
977 | INCREMENT_DISPLAY(ptr, nb_items); | |
978 | ptr += sprintf(ptr, "@dst %s", prefix2str(p, buff, 64)); | |
979 | } | |
980 | ||
981 | if (api->match_protocol_num) | |
982 | INCREMENT_DISPLAY(ptr, nb_items); | |
983 | for (i = 0; i < api->match_protocol_num; i++) | |
984 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->protocol[i], | |
985 | i > 0 ? NULL : "@proto "); | |
986 | ||
987 | if (api->match_src_port_num) | |
988 | INCREMENT_DISPLAY(ptr, nb_items); | |
989 | for (i = 0; i < api->match_src_port_num; i++) | |
990 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->src_port[i], | |
991 | i > 0 ? NULL : "@srcport "); | |
992 | ||
993 | if (api->match_dst_port_num) | |
994 | INCREMENT_DISPLAY(ptr, nb_items); | |
995 | for (i = 0; i < api->match_dst_port_num; i++) | |
996 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->dst_port[i], | |
997 | i > 0 ? NULL : "@dstport "); | |
998 | ||
999 | if (api->match_port_num) | |
1000 | INCREMENT_DISPLAY(ptr, nb_items); | |
1001 | for (i = 0; i < api->match_port_num; i++) | |
1002 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->port[i], | |
1003 | i > 0 ? NULL : "@port "); | |
1004 | ||
1005 | if (api->match_icmp_type_num) | |
1006 | INCREMENT_DISPLAY(ptr, nb_items); | |
1007 | for (i = 0; i < api->match_icmp_type_num; i++) | |
1008 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->icmp_type[i], | |
1009 | i > 0 ? NULL : "@icmptype "); | |
1010 | ||
1011 | if (api->match_icmp_code_num) | |
1012 | INCREMENT_DISPLAY(ptr, nb_items); | |
1013 | for (i = 0; i < api->match_icmp_code_num; i++) | |
1014 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->icmp_code[i], | |
1015 | i > 0 ? NULL : "@icmpcode "); | |
1016 | ||
1017 | if (api->match_packet_length_num) | |
1018 | INCREMENT_DISPLAY(ptr, nb_items); | |
1019 | for (i = 0; i < api->match_packet_length_num; i++) | |
1020 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->packet_length[i], | |
1021 | i > 0 ? NULL : "@plen "); | |
1022 | ||
1023 | if (api->match_dscp_num) | |
1024 | INCREMENT_DISPLAY(ptr, nb_items); | |
1025 | for (i = 0; i < api->match_dscp_num; i++) | |
1026 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->dscp[i], | |
1027 | i > 0 ? NULL : "@dscp "); | |
1028 | ||
1029 | if (api->match_tcpflags_num) | |
1030 | INCREMENT_DISPLAY(ptr, nb_items); | |
1031 | for (i = 0; i < api->match_tcpflags_num; i++) | |
1032 | ptr += sprintf_bgp_pbr_match_val(ptr, &api->tcpflags[i], | |
1033 | i > 0 ? NULL : "@tcpflags "); | |
1034 | ||
1035 | if (api->match_bitmask & FRAGMENT_PRESENT) { | |
1036 | INCREMENT_DISPLAY(ptr, nb_items); | |
1037 | ptr += sprintf(ptr, "@fragment %u", api->fragment.bitmask); | |
1038 | } | |
1039 | if (!nb_items) | |
1040 | ptr = return_string; | |
1041 | else | |
1042 | ptr += sprintf(ptr, "; "); | |
1043 | if (api->action_num) | |
1044 | ptr += sprintf(ptr, "SET : "); | |
1045 | nb_items = 0; | |
1046 | for (i = 0; i < api->action_num; i++) { | |
1047 | switch (api->actions[i].action) { | |
1048 | case ACTION_TRAFFICRATE: | |
1049 | INCREMENT_DISPLAY(ptr, nb_items); | |
1050 | ptr += sprintf(ptr, "@set rate %f", | |
1051 | api->actions[i].u.r.rate); | |
1052 | break; | |
1053 | case ACTION_TRAFFIC_ACTION: | |
1054 | INCREMENT_DISPLAY(ptr, nb_items); | |
1055 | ptr += sprintf(ptr, "@action "); | |
1056 | if (api->actions[i].u.za.filter | |
1057 | & TRAFFIC_ACTION_TERMINATE) | |
1058 | ptr += sprintf(ptr, | |
1059 | " terminate (apply filter(s))"); | |
1060 | if (api->actions[i].u.za.filter | |
1061 | & TRAFFIC_ACTION_DISTRIBUTE) | |
1062 | ptr += sprintf(ptr, " distribute"); | |
1063 | if (api->actions[i].u.za.filter | |
1064 | & TRAFFIC_ACTION_SAMPLE) | |
1065 | ptr += sprintf(ptr, " sample"); | |
1066 | break; | |
1067 | case ACTION_REDIRECT_IP: | |
1068 | INCREMENT_DISPLAY(ptr, nb_items); | |
1069 | char local_buff[INET_ADDRSTRLEN]; | |
1070 | ||
1071 | if (inet_ntop(AF_INET, | |
1072 | &api->actions[i].u.zr.redirect_ip_v4, | |
1073 | local_buff, INET_ADDRSTRLEN) != NULL) | |
1074 | ptr += sprintf(ptr, | |
1075 | "@redirect ip nh %s", local_buff); | |
1076 | break; | |
1077 | case ACTION_REDIRECT: | |
1078 | INCREMENT_DISPLAY(ptr, nb_items); | |
1079 | ptr += sprintf(ptr, "@redirect vrf %u", | |
1080 | api->actions[i].u.redirect_vrf); | |
1081 | break; | |
1082 | case ACTION_MARKING: | |
1083 | INCREMENT_DISPLAY(ptr, nb_items); | |
1084 | ptr += sprintf(ptr, "@set dscp %u", | |
1085 | api->actions[i].u.marking_dscp); | |
1086 | break; | |
1087 | default: | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | zlog_info("%s", return_string); | |
1092 | } | |
2749b788 | 1093 | |
ed132710 PG |
1094 | static void bgp_pbr_flush_entry(struct bgp *bgp, struct bgp_pbr_action *bpa, |
1095 | struct bgp_pbr_match *bpm, | |
1096 | struct bgp_pbr_match_entry *bpme) | |
1097 | { | |
1098 | /* if bpme is null, bpm is also null | |
1099 | */ | |
1100 | if (bpme == NULL) | |
1101 | return; | |
1102 | /* ipset del entry */ | |
1103 | if (bpme->installed) { | |
1104 | bgp_send_pbr_ipset_entry_match(bpme, false); | |
1105 | bpme->installed = false; | |
1106 | bpme->backpointer = NULL; | |
0320eee0 PG |
1107 | if (bpme->bgp_info) { |
1108 | struct bgp_info *bgp_info; | |
1109 | struct bgp_info_extra *extra; | |
1110 | ||
1111 | /* unlink bgp_info to bpme */ | |
1112 | bgp_info = (struct bgp_info *)bpme->bgp_info; | |
1113 | extra = bgp_info_extra_get(bgp_info); | |
1114 | extra->bgp_fs_pbr = NULL; | |
1115 | bpme->bgp_info = NULL; | |
1116 | } | |
ed132710 PG |
1117 | } |
1118 | hash_release(bpm->entry_hash, bpme); | |
1119 | if (hashcount(bpm->entry_hash) == 0) { | |
1120 | /* delete iptable entry first */ | |
1121 | /* then delete ipset match */ | |
1122 | if (bpm->installed) { | |
1123 | if (bpm->installed_in_iptable) { | |
1124 | bgp_send_pbr_iptable(bpm->action, | |
1125 | bpm, false); | |
1126 | bpm->installed_in_iptable = false; | |
317a239f | 1127 | bpm->action->refcnt--; |
ed132710 PG |
1128 | } |
1129 | bgp_send_pbr_ipset_match(bpm, false); | |
1130 | bpm->installed = false; | |
1131 | bpm->action = NULL; | |
1132 | } | |
1133 | hash_release(bgp->pbr_match_hash, bpm); | |
1134 | /* XXX release pbr_match_action if not used | |
1135 | * note that drop does not need to call send_pbr_action | |
1136 | */ | |
1137 | } | |
317a239f PG |
1138 | if (bpa->refcnt == 0) { |
1139 | if (bpa->installed && bpa->table_id != 0) { | |
1140 | bgp_send_pbr_rule_action(bpa, false); | |
1141 | bgp_zebra_announce_default(bpa->bgp, &(bpa->nh), | |
1142 | AFI_IP, | |
1143 | bpa->table_id, | |
1144 | false); | |
e195a297 | 1145 | bpa->installed = false; |
317a239f PG |
1146 | } |
1147 | } | |
ed132710 PG |
1148 | } |
1149 | ||
1150 | struct bgp_pbr_match_entry_remain { | |
1151 | struct bgp_pbr_match_entry *bpme_to_match; | |
1152 | struct bgp_pbr_match_entry *bpme_found; | |
1153 | }; | |
1154 | ||
1155 | static int bgp_pbr_get_remaining_entry(struct hash_backet *backet, void *arg) | |
1156 | { | |
1157 | struct bgp_pbr_match *bpm = (struct bgp_pbr_match *)backet->data; | |
1158 | struct bgp_pbr_match_entry_remain *bpmer = | |
1159 | (struct bgp_pbr_match_entry_remain *)arg; | |
1160 | struct bgp_pbr_match *bpm_temp; | |
1161 | struct bgp_pbr_match_entry *bpme = bpmer->bpme_to_match; | |
1162 | ||
1163 | if (!bpme->backpointer || | |
1164 | bpm == bpme->backpointer || | |
1165 | bpme->backpointer->action == bpm->action) | |
1166 | return HASHWALK_CONTINUE; | |
1167 | /* ensure bpm other characteristics are equal */ | |
1168 | bpm_temp = bpme->backpointer; | |
1169 | if (bpm_temp->vrf_id != bpm->vrf_id || | |
1170 | bpm_temp->type != bpm->type || | |
1171 | bpm_temp->flags != bpm->flags) | |
1172 | return HASHWALK_CONTINUE; | |
1173 | ||
1174 | /* look for remaining bpme */ | |
1175 | bpmer->bpme_found = hash_lookup(bpm->entry_hash, bpme); | |
1176 | if (!bpmer->bpme_found) | |
1177 | return HASHWALK_CONTINUE; | |
1178 | return HASHWALK_ABORT; | |
1179 | } | |
1180 | ||
674a711a | 1181 | static void bgp_pbr_policyroute_remove_from_zebra_unit(struct bgp *bgp, |
db237932 PG |
1182 | struct bgp_info *binfo, |
1183 | struct bgp_pbr_filter *bpf) | |
ed132710 PG |
1184 | { |
1185 | struct bgp_pbr_match temp; | |
1186 | struct bgp_pbr_match_entry temp2; | |
1187 | struct bgp_pbr_match *bpm; | |
1188 | struct bgp_pbr_match_entry *bpme; | |
1189 | struct bgp_pbr_match_entry_remain bpmer; | |
db237932 PG |
1190 | struct bgp_pbr_range_port *src_port; |
1191 | struct bgp_pbr_range_port *dst_port; | |
1192 | struct bgp_pbr_range_port *pkt_len; | |
1193 | ||
1194 | if (!bpf) | |
1195 | return; | |
1196 | src_port = bpf->src_port; | |
1197 | dst_port = bpf->dst_port; | |
1198 | pkt_len = bpf->pkt_len; | |
ed132710 PG |
1199 | |
1200 | /* as we don't know information from EC | |
1201 | * look for bpm that have the bpm | |
1202 | * with vrf_id characteristics | |
1203 | */ | |
1204 | memset(&temp2, 0, sizeof(temp2)); | |
1205 | memset(&temp, 0, sizeof(temp)); | |
db237932 | 1206 | if (bpf->src) { |
ed132710 | 1207 | temp.flags |= MATCH_IP_SRC_SET; |
db237932 | 1208 | prefix_copy(&temp2.src, bpf->src); |
ed132710 PG |
1209 | } else |
1210 | temp2.src.family = AF_INET; | |
db237932 | 1211 | if (bpf->dst) { |
ed132710 | 1212 | temp.flags |= MATCH_IP_DST_SET; |
db237932 | 1213 | prefix_copy(&temp2.dst, bpf->dst); |
ed132710 PG |
1214 | } else |
1215 | temp2.dst.family = AF_INET; | |
3b705172 | 1216 | if (src_port && src_port->min_port) { |
9353fe4e PG |
1217 | temp.flags |= MATCH_PORT_SRC_SET; |
1218 | temp2.src_port_min = src_port->min_port; | |
1219 | if (src_port->max_port) { | |
1220 | temp.flags |= MATCH_PORT_SRC_RANGE_SET; | |
1221 | temp2.src_port_max = src_port->max_port; | |
1222 | } | |
1223 | } | |
3b705172 | 1224 | if (dst_port && dst_port->min_port) { |
9353fe4e PG |
1225 | temp.flags |= MATCH_PORT_DST_SET; |
1226 | temp2.dst_port_min = dst_port->min_port; | |
1227 | if (dst_port->max_port) { | |
1228 | temp.flags |= MATCH_PORT_DST_RANGE_SET; | |
1229 | temp2.dst_port_max = dst_port->max_port; | |
1230 | } | |
1231 | } | |
db237932 | 1232 | temp2.proto = bpf->protocol; |
9353fe4e | 1233 | |
c0b8c1ab PG |
1234 | if (pkt_len) |
1235 | temp.pkt_len_min = pkt_len->min_port; | |
1236 | if (pkt_len && pkt_len->max_port) | |
1237 | temp.pkt_len_max = pkt_len->max_port; | |
d9e37996 PG |
1238 | if (bpf->tcp_flags) { |
1239 | temp.tcp_flags = bpf->tcp_flags->val; | |
1240 | temp.tcp_mask_flags = bpf->tcp_flags->mask; | |
1241 | } | |
d7e3bf1b PG |
1242 | if (bpf->dscp) { |
1243 | if (bpf->dscp->mask) | |
1244 | temp.flags |= MATCH_DSCP_INVERSE_SET; | |
1245 | else | |
1246 | temp.flags |= MATCH_DSCP_SET; | |
1247 | temp.dscp_value = bpf->dscp->val; | |
1248 | } | |
c0b8c1ab | 1249 | |
db237932 | 1250 | if (bpf->src == NULL || bpf->dst == NULL) { |
9353fe4e PG |
1251 | if (temp.flags & (MATCH_PORT_DST_SET | MATCH_PORT_SRC_SET)) |
1252 | temp.type = IPSET_NET_PORT; | |
1253 | else | |
1254 | temp.type = IPSET_NET; | |
1255 | } else { | |
1256 | if (temp.flags & (MATCH_PORT_DST_SET | MATCH_PORT_SRC_SET)) | |
1257 | temp.type = IPSET_NET_PORT_NET; | |
1258 | else | |
1259 | temp.type = IPSET_NET_NET; | |
1260 | } | |
db237932 | 1261 | if (bpf->vrf_id == VRF_UNKNOWN) /* XXX case BGP destroy */ |
ed132710 PG |
1262 | temp.vrf_id = 0; |
1263 | else | |
db237932 | 1264 | temp.vrf_id = bpf->vrf_id; |
ed132710 PG |
1265 | bpme = &temp2; |
1266 | bpm = &temp; | |
1267 | bpme->backpointer = bpm; | |
1268 | /* right now, a previous entry may already exist | |
1269 | * flush previous entry if necessary | |
1270 | */ | |
1271 | bpmer.bpme_to_match = bpme; | |
1272 | bpmer.bpme_found = NULL; | |
1273 | hash_walk(bgp->pbr_match_hash, bgp_pbr_get_remaining_entry, &bpmer); | |
1274 | if (bpmer.bpme_found) { | |
1275 | static struct bgp_pbr_match *local_bpm; | |
1276 | static struct bgp_pbr_action *local_bpa; | |
1277 | ||
1278 | local_bpm = bpmer.bpme_found->backpointer; | |
1279 | local_bpa = local_bpm->action; | |
1280 | bgp_pbr_flush_entry(bgp, local_bpa, | |
1281 | local_bpm, bpmer.bpme_found); | |
1282 | } | |
1283 | } | |
1284 | ||
674a711a PG |
1285 | static void bgp_pbr_policyroute_remove_from_zebra(struct bgp *bgp, |
1286 | struct bgp_info *binfo, | |
1287 | struct bgp_pbr_filter *bpf, | |
1288 | struct bgp_pbr_or_filter *bpof) | |
1289 | { | |
1290 | if (bpof && bpof->tcpflags) { | |
1291 | struct listnode *node, *nnode; | |
1292 | struct bgp_pbr_val_mask *valmask; | |
1293 | ||
1294 | for (ALL_LIST_ELEMENTS(bpof->tcpflags, node, nnode, valmask)) { | |
1295 | bpf->tcp_flags = valmask; | |
1296 | bgp_pbr_policyroute_remove_from_zebra_unit(bgp, binfo, bpf); | |
1297 | XFREE(MTYPE_PBR_VALMASK, valmask); | |
1298 | listnode_delete(bpof->tcpflags, node); | |
1299 | } | |
1300 | list_delete_all_node(bpof->tcpflags); | |
1301 | bpof->tcpflags = NULL; | |
1302 | } else | |
1303 | bgp_pbr_policyroute_remove_from_zebra_unit(bgp, binfo, bpf); | |
1304 | } | |
1305 | ||
1306 | static void bgp_pbr_policyroute_add_to_zebra_unit(struct bgp *bgp, | |
9353fe4e | 1307 | struct bgp_info *binfo, |
db237932 | 1308 | struct bgp_pbr_filter *bpf, |
9353fe4e | 1309 | struct nexthop *nh, |
db237932 | 1310 | float *rate) |
ed132710 PG |
1311 | { |
1312 | struct bgp_pbr_match temp; | |
1313 | struct bgp_pbr_match_entry temp2; | |
1314 | struct bgp_pbr_match *bpm; | |
1315 | struct bgp_pbr_match_entry *bpme = NULL; | |
1316 | struct bgp_pbr_action temp3; | |
1317 | struct bgp_pbr_action *bpa = NULL; | |
1318 | struct bgp_pbr_match_entry_remain bpmer; | |
db237932 PG |
1319 | struct bgp_pbr_range_port *src_port; |
1320 | struct bgp_pbr_range_port *dst_port; | |
1321 | struct bgp_pbr_range_port *pkt_len; | |
1322 | ||
1323 | if (!bpf) | |
1324 | return; | |
1325 | src_port = bpf->src_port; | |
1326 | dst_port = bpf->dst_port; | |
1327 | pkt_len = bpf->pkt_len; | |
ed132710 | 1328 | |
fa73fdcb PG |
1329 | if (BGP_DEBUG(zebra, ZEBRA)) { |
1330 | char bufsrc[64], bufdst[64]; | |
1331 | char buffer[64]; | |
1332 | int remaining_len = 0; | |
1333 | char protocol_str[16]; | |
1334 | ||
1335 | protocol_str[0] = '\0'; | |
d9e37996 PG |
1336 | if (bpf->tcp_flags && bpf->tcp_flags->mask) |
1337 | bpf->protocol = IPPROTO_TCP; | |
db237932 PG |
1338 | if (bpf->protocol) |
1339 | snprintf(protocol_str, sizeof(protocol_str), | |
1340 | "proto %d", bpf->protocol); | |
fa73fdcb | 1341 | buffer[0] = '\0'; |
db237932 | 1342 | if (bpf->protocol == IPPROTO_ICMP && src_port && dst_port) |
d9e37996 PG |
1343 | remaining_len += snprintf(buffer, sizeof(buffer), |
1344 | "type %d, code %d", | |
fa73fdcb | 1345 | src_port->min_port, dst_port->min_port); |
db237932 PG |
1346 | else if (bpf->protocol == IPPROTO_UDP || |
1347 | bpf->protocol == IPPROTO_TCP) { | |
fa73fdcb PG |
1348 | |
1349 | if (src_port && src_port->min_port) | |
1350 | remaining_len += snprintf(buffer, | |
1351 | sizeof(buffer), | |
1352 | "from [%u:%u]", | |
1353 | src_port->min_port, | |
1354 | src_port->max_port ? | |
1355 | src_port->max_port : | |
1356 | src_port->min_port); | |
1357 | if (dst_port && dst_port->min_port) | |
1358 | remaining_len += snprintf(buffer + | |
1359 | remaining_len, | |
1360 | sizeof(buffer) | |
1361 | - remaining_len, | |
1362 | "to [%u:%u]", | |
1363 | dst_port->min_port, | |
1364 | dst_port->max_port ? | |
1365 | dst_port->max_port : | |
1366 | dst_port->min_port); | |
1367 | } | |
1368 | if (pkt_len && (pkt_len->min_port || pkt_len->max_port)) { | |
1369 | remaining_len += snprintf(buffer + remaining_len, | |
1370 | sizeof(buffer) | |
1371 | - remaining_len, | |
1372 | " len [%u:%u]", | |
1373 | pkt_len->min_port, | |
1374 | pkt_len->max_port ? | |
1375 | pkt_len->max_port : | |
1376 | pkt_len->min_port); | |
1377 | } | |
d9e37996 PG |
1378 | if (bpf->tcp_flags) { |
1379 | remaining_len += snprintf(buffer + remaining_len, | |
1380 | sizeof(buffer) | |
1381 | - remaining_len, | |
1382 | "tcpflags %x/%x", | |
1383 | bpf->tcp_flags->val, | |
1384 | bpf->tcp_flags->mask); | |
1385 | } | |
d7e3bf1b PG |
1386 | if (bpf->dscp) { |
1387 | snprintf(buffer + remaining_len, | |
1388 | sizeof(buffer) | |
1389 | - remaining_len, | |
1390 | "%s dscp %d", | |
1391 | bpf->dscp->mask | |
1392 | ? "!" : "", | |
1393 | bpf->dscp->val); | |
1394 | } | |
fa73fdcb | 1395 | zlog_info("BGP: adding FS PBR from %s to %s, %s %s", |
db237932 PG |
1396 | bpf->src == NULL ? "<all>" : |
1397 | prefix2str(bpf->src, bufsrc, sizeof(bufsrc)), | |
1398 | bpf->dst == NULL ? "<all>" : | |
1399 | prefix2str(bpf->dst, bufdst, sizeof(bufdst)), | |
fa73fdcb PG |
1400 | protocol_str, buffer); |
1401 | } | |
ed132710 PG |
1402 | /* look for bpa first */ |
1403 | memset(&temp3, 0, sizeof(temp3)); | |
1404 | if (rate) | |
1405 | temp3.rate = *rate; | |
1406 | if (nh) | |
1407 | memcpy(&temp3.nh, nh, sizeof(struct nexthop)); | |
db237932 | 1408 | temp3.vrf_id = bpf->vrf_id; |
ed132710 PG |
1409 | bpa = hash_get(bgp->pbr_action_hash, &temp3, |
1410 | bgp_pbr_action_alloc_intern); | |
1411 | ||
1412 | if (bpa->fwmark == 0) { | |
ed132710 PG |
1413 | /* drop is handled by iptable */ |
1414 | if (nh && nh->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1415 | bpa->table_id = 0; | |
1416 | bpa->installed = true; | |
1417 | } else { | |
d53bfbb3 PG |
1418 | bpa->fwmark = bgp_zebra_tm_get_id(); |
1419 | bpa->table_id = bpa->fwmark; | |
ed132710 PG |
1420 | bpa->installed = false; |
1421 | } | |
317a239f | 1422 | bpa->bgp = bgp; |
ed132710 PG |
1423 | bpa->unique = ++bgp_pbr_action_counter_unique; |
1424 | /* 0 value is forbidden */ | |
1425 | bpa->install_in_progress = false; | |
1426 | } | |
1427 | ||
1428 | /* then look for bpm */ | |
1429 | memset(&temp, 0, sizeof(temp)); | |
db237932 | 1430 | if (bpf->src == NULL || bpf->dst == NULL) { |
9353fe4e PG |
1431 | if ((src_port && src_port->min_port) || |
1432 | (dst_port && dst_port->min_port)) | |
1433 | temp.type = IPSET_NET_PORT; | |
1434 | else | |
1435 | temp.type = IPSET_NET; | |
1436 | } else { | |
1437 | if ((src_port && src_port->min_port) || | |
1438 | (dst_port && dst_port->min_port)) | |
1439 | temp.type = IPSET_NET_PORT_NET; | |
1440 | else | |
1441 | temp.type = IPSET_NET_NET; | |
1442 | } | |
db237932 PG |
1443 | temp.vrf_id = bpf->vrf_id; |
1444 | if (bpf->src) | |
ed132710 | 1445 | temp.flags |= MATCH_IP_SRC_SET; |
db237932 | 1446 | if (bpf->dst) |
ed132710 | 1447 | temp.flags |= MATCH_IP_DST_SET; |
9353fe4e PG |
1448 | |
1449 | if (src_port && src_port->min_port) | |
1450 | temp.flags |= MATCH_PORT_SRC_SET; | |
1451 | if (dst_port && dst_port->min_port) | |
1452 | temp.flags |= MATCH_PORT_DST_SET; | |
1453 | if (src_port && src_port->max_port) | |
1454 | temp.flags |= MATCH_PORT_SRC_RANGE_SET; | |
1455 | if (dst_port && dst_port->max_port) | |
1456 | temp.flags |= MATCH_PORT_DST_RANGE_SET; | |
c0b8c1ab PG |
1457 | if (pkt_len) |
1458 | temp.pkt_len_min = pkt_len->min_port; | |
1459 | if (pkt_len && pkt_len->max_port) | |
1460 | temp.pkt_len_max = pkt_len->max_port; | |
d9e37996 PG |
1461 | if (bpf->tcp_flags) { |
1462 | temp.tcp_flags = bpf->tcp_flags->val; | |
1463 | temp.tcp_mask_flags = bpf->tcp_flags->mask; | |
1464 | } | |
d7e3bf1b PG |
1465 | if (bpf->dscp) { |
1466 | if (bpf->dscp->mask) | |
1467 | temp.flags |= MATCH_DSCP_INVERSE_SET; | |
1468 | else | |
1469 | temp.flags |= MATCH_DSCP_SET; | |
1470 | temp.dscp_value = bpf->dscp->val; | |
1471 | } | |
ed132710 PG |
1472 | temp.action = bpa; |
1473 | bpm = hash_get(bgp->pbr_match_hash, &temp, | |
1474 | bgp_pbr_match_alloc_intern); | |
1475 | ||
1476 | /* new, then self allocate ipset_name and unique */ | |
1477 | if (bpm && bpm->unique == 0) { | |
1478 | bpm->unique = ++bgp_pbr_match_counter_unique; | |
1479 | /* 0 value is forbidden */ | |
1480 | sprintf(bpm->ipset_name, "match%p", bpm); | |
1481 | bpm->entry_hash = hash_create_size(8, | |
1482 | bgp_pbr_match_entry_hash_key, | |
1483 | bgp_pbr_match_entry_hash_equal, | |
1484 | "Match Entry Hash"); | |
1485 | bpm->installed = false; | |
1486 | ||
1487 | /* unique2 should be updated too */ | |
1488 | bpm->unique2 = ++bgp_pbr_match_iptable_counter_unique; | |
1489 | bpm->installed_in_iptable = false; | |
1490 | bpm->install_in_progress = false; | |
1491 | bpm->install_iptable_in_progress = false; | |
1492 | } | |
1493 | ||
1494 | memset(&temp2, 0, sizeof(temp2)); | |
db237932 PG |
1495 | if (bpf->src) |
1496 | prefix_copy(&temp2.src, bpf->src); | |
ed132710 PG |
1497 | else |
1498 | temp2.src.family = AF_INET; | |
db237932 PG |
1499 | if (bpf->dst) |
1500 | prefix_copy(&temp2.dst, bpf->dst); | |
ed132710 PG |
1501 | else |
1502 | temp2.dst.family = AF_INET; | |
9353fe4e PG |
1503 | temp2.src_port_min = src_port ? src_port->min_port : 0; |
1504 | temp2.dst_port_min = dst_port ? dst_port->min_port : 0; | |
1505 | temp2.src_port_max = src_port ? src_port->max_port : 0; | |
1506 | temp2.dst_port_max = dst_port ? dst_port->max_port : 0; | |
db237932 | 1507 | temp2.proto = bpf->protocol; |
ed132710 PG |
1508 | if (bpm) |
1509 | bpme = hash_get(bpm->entry_hash, &temp2, | |
9353fe4e | 1510 | bgp_pbr_match_entry_alloc_intern); |
ed132710 PG |
1511 | if (bpme && bpme->unique == 0) { |
1512 | bpme->unique = ++bgp_pbr_match_entry_counter_unique; | |
1513 | /* 0 value is forbidden */ | |
1514 | bpme->backpointer = bpm; | |
1515 | bpme->installed = false; | |
1516 | bpme->install_in_progress = false; | |
0320eee0 PG |
1517 | /* link bgp info to bpme */ |
1518 | bpme->bgp_info = (void *)binfo; | |
ed132710 PG |
1519 | } |
1520 | ||
1521 | /* BGP FS: append entry to zebra | |
1522 | * - policies are not routing entries and as such | |
1523 | * route replace semantics don't necessarily follow | |
1524 | * through to policy entries | |
1525 | * - because of that, not all policing information will be stored | |
1526 | * into zebra. and non selected policies will be suppressed from zebra | |
1527 | * - as consequence, in order to bring consistency | |
1528 | * a policy will be added, then ifan ecmp policy exists, | |
1529 | * it will be suppressed subsequently | |
1530 | */ | |
1531 | /* ip rule add */ | |
f43d659e | 1532 | if (!bpa->installed && !bpa->install_in_progress) { |
ed132710 | 1533 | bgp_send_pbr_rule_action(bpa, true); |
9b269948 PG |
1534 | bgp_zebra_announce_default(bgp, nh, |
1535 | AFI_IP, bpa->table_id, true); | |
1536 | } | |
ed132710 PG |
1537 | |
1538 | /* ipset create */ | |
1539 | if (bpm && !bpm->installed) | |
1540 | bgp_send_pbr_ipset_match(bpm, true); | |
1541 | /* ipset add */ | |
1542 | if (bpme && !bpme->installed) | |
1543 | bgp_send_pbr_ipset_entry_match(bpme, true); | |
1544 | ||
1545 | /* iptables */ | |
1546 | if (bpm && !bpm->installed_in_iptable) | |
1547 | bgp_send_pbr_iptable(bpa, bpm, true); | |
1548 | ||
1549 | /* A previous entry may already exist | |
1550 | * flush previous entry if necessary | |
1551 | */ | |
1552 | bpmer.bpme_to_match = bpme; | |
1553 | bpmer.bpme_found = NULL; | |
1554 | hash_walk(bgp->pbr_match_hash, bgp_pbr_get_remaining_entry, &bpmer); | |
1555 | if (bpmer.bpme_found) { | |
1556 | static struct bgp_pbr_match *local_bpm; | |
1557 | static struct bgp_pbr_action *local_bpa; | |
1558 | ||
1559 | local_bpm = bpmer.bpme_found->backpointer; | |
1560 | local_bpa = local_bpm->action; | |
1561 | bgp_pbr_flush_entry(bgp, local_bpa, | |
1562 | local_bpm, bpmer.bpme_found); | |
1563 | } | |
1564 | ||
1565 | ||
1566 | } | |
1567 | ||
674a711a PG |
1568 | static void bgp_pbr_policyroute_add_to_zebra(struct bgp *bgp, |
1569 | struct bgp_info *binfo, | |
1570 | struct bgp_pbr_filter *bpf, | |
1571 | struct bgp_pbr_or_filter *bpof, | |
1572 | struct nexthop *nh, | |
1573 | float *rate) | |
1574 | { | |
1575 | if (bpof && bpof->tcpflags) { | |
1576 | struct listnode *node, *nnode; | |
1577 | struct bgp_pbr_val_mask *valmask; | |
1578 | ||
1579 | for (ALL_LIST_ELEMENTS(bpof->tcpflags, node, nnode, valmask)) { | |
1580 | bpf->tcp_flags = valmask; | |
1581 | bgp_pbr_policyroute_add_to_zebra_unit(bgp, binfo, bpf, nh, rate); | |
1582 | XFREE(MTYPE_PBR_VALMASK, valmask); | |
1583 | listnode_delete(bpof->tcpflags, node); | |
1584 | } | |
1585 | list_delete_all_node(bpof->tcpflags); | |
1586 | bpof->tcpflags = NULL; | |
1587 | } else | |
1588 | return bgp_pbr_policyroute_add_to_zebra_unit(bgp, binfo, | |
1589 | bpf, nh, rate); | |
1590 | } | |
1591 | ||
3b705172 PG |
1592 | static const struct message icmp_code_unreach_str[] = { |
1593 | { 9, "communication-prohibited-by-filtering"}, | |
1594 | { 10, "destination-host-prohibited"}, | |
1595 | { 7, "destination-host-unknown"}, | |
1596 | { 6, "destination-network-unknown"}, | |
1597 | { 4, "fragmentation-needed"}, | |
1598 | { 14, "host-precedence-violation"}, | |
1599 | { 0, "network-unreachable"}, | |
1600 | { 12, "network-unreachable-for-tos"}, | |
1601 | { 3, "port-unreachable"}, | |
1602 | { 8, "source-host-isolated"}, | |
1603 | { 5, "source-route-failed"}, | |
1604 | {0} | |
1605 | }; | |
1606 | ||
1607 | static const struct message icmp_code_redirect_str[] = { | |
1608 | { 1, "redirect-for-host"}, | |
1609 | { 0, "redirect-for-network"}, | |
1610 | { 3, "redirect-for-tos-and-host"}, | |
1611 | { 2, "redirect-for-tos-and-net"}, | |
1612 | {0} | |
1613 | }; | |
1614 | ||
1615 | static const struct message icmp_code_exceed_str[] = { | |
1616 | { 1, "ttl-eq-zero-during-reassembly"}, | |
1617 | { 0, "ttl-eq-zero-during-transit"}, | |
1618 | {0} | |
1619 | }; | |
1620 | ||
1621 | static const struct message icmp_code_problem_str[] = { | |
1622 | { 1, "required-option-missing"}, | |
1623 | { 2, "ip-header-bad"}, | |
1624 | {0} | |
1625 | }; | |
1626 | static void bgp_pbr_enumerate_action_src_dst(struct bgp_pbr_match_val src[], | |
1627 | int src_num, | |
1628 | struct bgp_pbr_match_val dst[], | |
1629 | int dst_num, | |
db237932 | 1630 | struct bgp_pbr_filter *bpf, |
3b705172 PG |
1631 | struct bgp *bgp, |
1632 | struct bgp_info *binfo, | |
1633 | bool add, | |
3b705172 PG |
1634 | struct nexthop *nh, |
1635 | float *rate) | |
1636 | { | |
1637 | int i = 0, j; | |
1638 | struct bgp_pbr_range_port srcp, dstp; | |
1639 | ||
db237932 | 1640 | if (!bpf) |
3b705172 | 1641 | return; |
db237932 PG |
1642 | if (bpf->protocol != IPPROTO_ICMP) |
1643 | return; | |
1644 | bpf->src_port = &srcp; | |
1645 | bpf->dst_port = &dstp; | |
3b705172 PG |
1646 | /* combinatory forced. ignore icmp type / code combinatory */ |
1647 | if (src_num == 1 && dst_num == 1) { | |
1648 | srcp.max_port = 0; | |
1649 | dstp.max_port = 0; | |
1650 | srcp.min_port = src[0].value; | |
1651 | dstp.min_port = dst[0].value; | |
1652 | if (add) | |
1653 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, | |
674a711a | 1654 | bpf, NULL, nh, rate); |
3b705172 | 1655 | else |
db237932 | 1656 | bgp_pbr_policyroute_remove_from_zebra(bgp, |
674a711a | 1657 | binfo, bpf, NULL); |
3b705172 PG |
1658 | return; |
1659 | } | |
1660 | /* parse icmp type and lookup appropriate icmp code | |
1661 | * if no icmp code found, create as many entryes as | |
1662 | * there are listed icmp codes for that icmp type | |
1663 | */ | |
1664 | for (i = 0; i < src_num; i++) { | |
1665 | const struct message *pnt; | |
1666 | const struct message *pnt_code = NULL; | |
1667 | static struct message nt = {0}; | |
1668 | bool icmp_typecode_configured = false; | |
1669 | ||
1670 | srcp.min_port = src[i].value; | |
1671 | srcp.max_port = 0; | |
1672 | dstp.max_port = 0; | |
1673 | if (src[i].value == 3) | |
1674 | pnt_code = icmp_code_unreach_str; | |
1675 | else if (src[i].value == 5) | |
1676 | pnt_code = icmp_code_redirect_str; | |
1677 | else if (src[i].value == 11) | |
1678 | pnt_code = icmp_code_exceed_str; | |
1679 | else if (src[i].value == 12) | |
1680 | pnt_code = icmp_code_problem_str; | |
1681 | switch (src[i].value) { | |
1682 | case 3: | |
1683 | case 5: | |
1684 | case 11: | |
1685 | case 12: | |
1686 | for (j = 0; j < dst_num; j++) { | |
1687 | for (pnt = pnt_code; | |
1688 | pnt && memcmp(pnt, &nt, sizeof(struct message)); | |
1689 | pnt++) { | |
1690 | if (dst[i].value != pnt->key) | |
1691 | continue; | |
1692 | dstp.min_port = dst[i].value; | |
1693 | icmp_typecode_configured = true; | |
1694 | if (add) | |
1695 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, | |
674a711a PG |
1696 | bpf, NULL, |
1697 | nh, rate); | |
3b705172 PG |
1698 | else |
1699 | bgp_pbr_policyroute_remove_from_zebra( | |
674a711a | 1700 | bgp, binfo, bpf, NULL); |
3b705172 PG |
1701 | } |
1702 | } | |
1703 | /* create a list of ICMP type/code combinatories */ | |
1704 | if (!icmp_typecode_configured) { | |
1705 | for (pnt = pnt_code; | |
1706 | pnt && memcmp(pnt, &nt, sizeof(struct message)); | |
1707 | pnt++) { | |
1708 | dstp.min_port = pnt->key; | |
1709 | if (add) | |
1710 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, | |
674a711a | 1711 | bpf, NULL, nh, rate); |
3b705172 | 1712 | else |
db237932 | 1713 | bgp_pbr_policyroute_remove_from_zebra(bgp, |
674a711a | 1714 | binfo, bpf, NULL); |
3b705172 PG |
1715 | } |
1716 | ||
1717 | } | |
1718 | break; | |
1719 | default: | |
1720 | /* icmp type is not one of the above | |
1721 | * forge an entry only based on the icmp type | |
1722 | */ | |
1723 | dstp.min_port = 0; | |
1724 | if (add) | |
1725 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, | |
674a711a | 1726 | bpf, NULL, nh, rate); |
3b705172 | 1727 | else |
db237932 | 1728 | bgp_pbr_policyroute_remove_from_zebra(bgp, |
674a711a | 1729 | binfo, bpf, NULL); |
3b705172 PG |
1730 | break; |
1731 | } | |
1732 | } | |
1733 | } | |
1734 | ||
ed132710 PG |
1735 | static void bgp_pbr_handle_entry(struct bgp *bgp, |
1736 | struct bgp_info *binfo, | |
1737 | struct bgp_pbr_entry_main *api, | |
1738 | bool add) | |
1739 | { | |
1740 | struct nexthop nh; | |
1741 | int i = 0; | |
1742 | int continue_loop = 1; | |
1743 | float rate = 0; | |
1744 | struct prefix *src = NULL, *dst = NULL; | |
9353fe4e PG |
1745 | uint8_t proto = 0; |
1746 | struct bgp_pbr_range_port *srcp = NULL, *dstp = NULL; | |
3b705172 | 1747 | struct bgp_pbr_range_port range, range_icmp_code; |
c0b8c1ab | 1748 | struct bgp_pbr_range_port pkt_len; |
3b705172 | 1749 | bool enum_icmp = false; |
db237932 | 1750 | struct bgp_pbr_filter bpf; |
fd36d122 PG |
1751 | uint8_t kind_enum; |
1752 | struct bgp_pbr_or_filter bpof; | |
674a711a | 1753 | struct bgp_pbr_val_mask bpvm; |
ed132710 | 1754 | |
2adee8a1 | 1755 | memset(&nh, 0, sizeof(struct nexthop)); |
db237932 | 1756 | memset(&bpf, 0, sizeof(struct bgp_pbr_filter)); |
fd36d122 | 1757 | memset(&bpof, 0, sizeof(struct bgp_pbr_or_filter)); |
ed132710 PG |
1758 | if (api->match_bitmask & PREFIX_SRC_PRESENT) |
1759 | src = &api->src_prefix; | |
1760 | if (api->match_bitmask & PREFIX_DST_PRESENT) | |
1761 | dst = &api->dst_prefix; | |
1762 | memset(&nh, 0, sizeof(struct nexthop)); | |
1763 | nh.vrf_id = VRF_UNKNOWN; | |
9353fe4e PG |
1764 | if (api->match_protocol_num) |
1765 | proto = (uint8_t)api->protocol[0].value; | |
1766 | /* if match_port is selected, then either src or dst port will be parsed | |
1767 | * but not both at the same time | |
1768 | */ | |
1769 | if (api->match_port_num >= 1) { | |
1770 | bgp_pbr_extract(api->port, | |
1771 | api->match_port_num, | |
1772 | &range); | |
1773 | srcp = dstp = ⦥ | |
1774 | } else if (api->match_src_port_num >= 1) { | |
1775 | bgp_pbr_extract(api->src_port, | |
1776 | api->match_src_port_num, | |
1777 | &range); | |
1778 | srcp = ⦥ | |
1779 | dstp = NULL; | |
1780 | } else if (api->match_dst_port_num >= 1) { | |
1781 | bgp_pbr_extract(api->dst_port, | |
1782 | api->match_dst_port_num, | |
1783 | &range); | |
1784 | dstp = ⦥ | |
1785 | srcp = NULL; | |
1786 | } | |
3b705172 PG |
1787 | if (api->match_icmp_type_num >= 1) { |
1788 | proto = IPPROTO_ICMP; | |
1789 | if (bgp_pbr_extract_enumerate(api->icmp_type, | |
d9e37996 PG |
1790 | api->match_icmp_type_num, |
1791 | OPERATOR_UNARY_OR, NULL)) | |
3b705172 PG |
1792 | enum_icmp = true; |
1793 | else { | |
1794 | bgp_pbr_extract(api->icmp_type, | |
1795 | api->match_icmp_type_num, | |
1796 | &range); | |
1797 | srcp = ⦥ | |
1798 | } | |
1799 | } | |
1800 | if (api->match_icmp_code_num >= 1) { | |
1801 | proto = IPPROTO_ICMP; | |
1802 | if (bgp_pbr_extract_enumerate(api->icmp_code, | |
d9e37996 PG |
1803 | api->match_icmp_code_num, |
1804 | OPERATOR_UNARY_OR, NULL)) | |
3b705172 PG |
1805 | enum_icmp = true; |
1806 | else { | |
1807 | bgp_pbr_extract(api->icmp_code, | |
1808 | api->match_icmp_code_num, | |
1809 | &range_icmp_code); | |
1810 | dstp = &range_icmp_code; | |
1811 | } | |
1812 | } | |
d9e37996 | 1813 | |
fd36d122 PG |
1814 | if (api->match_tcpflags_num) { |
1815 | kind_enum = bgp_pbr_match_val_get_operator(api->tcpflags, | |
1816 | api->match_tcpflags_num); | |
1817 | if (kind_enum == OPERATOR_UNARY_AND) { | |
674a711a | 1818 | bpf.tcp_flags = &bpvm; |
fd36d122 PG |
1819 | bgp_pbr_extract_enumerate(api->tcpflags, |
1820 | api->match_tcpflags_num, | |
1821 | OPERATOR_UNARY_AND, bpf.tcp_flags); | |
1822 | } else if (kind_enum == OPERATOR_UNARY_OR) { | |
1823 | bpof.tcpflags = list_new(); | |
1824 | bgp_pbr_extract_enumerate(api->tcpflags, | |
1825 | api->match_tcpflags_num, | |
1826 | OPERATOR_UNARY_OR, bpof.tcpflags); | |
1827 | } | |
1828 | } | |
d9e37996 | 1829 | if (api->match_packet_length_num >= 1) { |
c0b8c1ab PG |
1830 | bgp_pbr_extract(api->packet_length, |
1831 | api->match_packet_length_num, | |
1832 | &pkt_len); | |
d9e37996 PG |
1833 | bpf.pkt_len = &pkt_len; |
1834 | } | |
d7e3bf1b PG |
1835 | if (api->match_dscp_num >= 1) { |
1836 | bpf.dscp_presence = true; | |
1837 | bpf.dscp_value = api->dscp[0].value; | |
1838 | ||
1839 | } | |
db237932 PG |
1840 | bpf.vrf_id = api->vrf_id; |
1841 | bpf.src = src; | |
1842 | bpf.dst = dst; | |
1843 | bpf.protocol = proto; | |
db237932 PG |
1844 | bpf.src_port = srcp; |
1845 | bpf.dst_port = dstp; | |
3b705172 PG |
1846 | if (!add) { |
1847 | if (enum_icmp) { | |
1848 | return bgp_pbr_enumerate_action_src_dst(api->icmp_type, | |
1849 | api->match_icmp_type_num, | |
1850 | api->icmp_code, | |
1851 | api->match_icmp_code_num, | |
db237932 PG |
1852 | &bpf, bgp, binfo, add, |
1853 | NULL, NULL); | |
3b705172 PG |
1854 | } |
1855 | return bgp_pbr_policyroute_remove_from_zebra(bgp, | |
1856 | binfo, | |
674a711a | 1857 | &bpf, &bpof); |
3b705172 | 1858 | } |
ed132710 PG |
1859 | /* no action for add = true */ |
1860 | for (i = 0; i < api->action_num; i++) { | |
1861 | switch (api->actions[i].action) { | |
1862 | case ACTION_TRAFFICRATE: | |
1863 | /* drop packet */ | |
1864 | if (api->actions[i].u.r.rate == 0) { | |
1865 | nh.vrf_id = api->vrf_id; | |
1866 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
3b705172 PG |
1867 | if (enum_icmp) |
1868 | bgp_pbr_enumerate_action_src_dst(api->icmp_type, | |
1869 | api->match_icmp_type_num, | |
1870 | api->icmp_code, | |
1871 | api->match_icmp_code_num, | |
db237932 PG |
1872 | &bpf, bgp, binfo, add, |
1873 | &nh, &rate); | |
3b705172 | 1874 | else |
db237932 | 1875 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, &bpf, |
674a711a | 1876 | &bpof, &nh, &rate); |
ed132710 PG |
1877 | } else { |
1878 | /* update rate. can be reentrant */ | |
1879 | rate = api->actions[i].u.r.rate; | |
aeb8f086 | 1880 | if (BGP_DEBUG(pbr, PBR)) { |
ed132710 | 1881 | bgp_pbr_print_policy_route(api); |
aeb8f086 PG |
1882 | zlog_warn("PBR: ignoring Set action rate %f", |
1883 | api->actions[i].u.r.rate); | |
1884 | } | |
ed132710 PG |
1885 | } |
1886 | break; | |
1887 | case ACTION_TRAFFIC_ACTION: | |
1888 | if (api->actions[i].u.za.filter | |
1889 | & TRAFFIC_ACTION_SAMPLE) { | |
aeb8f086 | 1890 | if (BGP_DEBUG(pbr, PBR)) { |
ed132710 | 1891 | bgp_pbr_print_policy_route(api); |
aeb8f086 PG |
1892 | zlog_warn("PBR: Sample action Ignored"); |
1893 | } | |
ed132710 PG |
1894 | } |
1895 | #if 0 | |
1896 | if (api->actions[i].u.za.filter | |
1897 | & TRAFFIC_ACTION_DISTRIBUTE) { | |
aeb8f086 | 1898 | if (BGP_DEBUG(pbr, PBR)) { |
ed132710 | 1899 | bgp_pbr_print_policy_route(api); |
aeb8f086 PG |
1900 | zlog_warn("PBR: Distribute action Applies"); |
1901 | } | |
ed132710 PG |
1902 | continue_loop = 0; |
1903 | /* continue forwarding entry as before | |
1904 | * no action | |
1905 | */ | |
1906 | } | |
1907 | #endif /* XXX to confirm behaviour of traffic action. for now , ignore */ | |
1908 | /* terminate action: run other filters | |
1909 | */ | |
1910 | break; | |
1911 | case ACTION_REDIRECT_IP: | |
1912 | nh.type = NEXTHOP_TYPE_IPV4; | |
1913 | nh.gate.ipv4.s_addr = | |
1914 | api->actions[i].u.zr.redirect_ip_v4.s_addr; | |
1915 | nh.vrf_id = api->vrf_id; | |
3b705172 PG |
1916 | if (enum_icmp) |
1917 | bgp_pbr_enumerate_action_src_dst(api->icmp_type, | |
1918 | api->match_icmp_type_num, | |
1919 | api->icmp_code, | |
1920 | api->match_icmp_code_num, | |
db237932 PG |
1921 | &bpf, bgp, binfo, add, |
1922 | &nh, &rate); | |
3b705172 | 1923 | else |
674a711a | 1924 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, &bpf, &bpof, |
db237932 | 1925 | &nh, &rate); |
ed132710 PG |
1926 | /* XXX combination with REDIRECT_VRF |
1927 | * + REDIRECT_NH_IP not done | |
1928 | */ | |
1929 | continue_loop = 0; | |
1930 | break; | |
1931 | case ACTION_REDIRECT: | |
1932 | nh.vrf_id = api->actions[i].u.redirect_vrf; | |
1933 | nh.type = NEXTHOP_TYPE_IPV4; | |
3b705172 PG |
1934 | if (enum_icmp) |
1935 | bgp_pbr_enumerate_action_src_dst(api->icmp_type, | |
1936 | api->match_icmp_type_num, | |
1937 | api->icmp_code, | |
1938 | api->match_icmp_code_num, | |
db237932 PG |
1939 | &bpf, bgp, binfo, add, |
1940 | &nh, &rate); | |
3b705172 PG |
1941 | else |
1942 | bgp_pbr_policyroute_add_to_zebra(bgp, binfo, | |
674a711a | 1943 | &bpf, &bpof, &nh, &rate); |
ed132710 PG |
1944 | continue_loop = 0; |
1945 | break; | |
1946 | case ACTION_MARKING: | |
aeb8f086 | 1947 | if (BGP_DEBUG(pbr, PBR)) { |
ed132710 | 1948 | bgp_pbr_print_policy_route(api); |
aeb8f086 PG |
1949 | zlog_warn("PBR: Set DSCP %u Ignored", |
1950 | api->actions[i].u.marking_dscp); | |
1951 | } | |
ed132710 PG |
1952 | break; |
1953 | default: | |
1954 | break; | |
1955 | } | |
1956 | if (continue_loop == 0) | |
1957 | break; | |
1958 | } | |
1959 | } | |
1960 | ||
2749b788 PG |
1961 | void bgp_pbr_update_entry(struct bgp *bgp, struct prefix *p, |
1962 | struct bgp_info *info, afi_t afi, safi_t safi, | |
1963 | bool nlri_update) | |
1964 | { | |
1965 | struct bgp_pbr_entry_main api; | |
88c423d5 | 1966 | struct bgp_info_extra *extra = bgp_info_extra_get(info); |
2749b788 PG |
1967 | |
1968 | if (afi == AFI_IP6) | |
1969 | return; /* IPv6 not supported */ | |
1970 | if (safi != SAFI_FLOWSPEC) | |
1971 | return; /* not supported */ | |
1972 | /* Make Zebra API structure. */ | |
1973 | memset(&api, 0, sizeof(api)); | |
1974 | api.vrf_id = bgp->vrf_id; | |
1975 | api.afi = afi; | |
1976 | ||
88c423d5 | 1977 | if (!bgp_zebra_tm_chunk_obtained()) { |
060eadea | 1978 | if (BGP_DEBUG(pbr, PBR_ERROR)) |
88c423d5 | 1979 | zlog_err("%s: table chunk not obtained yet", |
060eadea | 1980 | __func__); |
88c423d5 PG |
1981 | return; |
1982 | } | |
1983 | /* already installed */ | |
1984 | if (nlri_update && extra->bgp_fs_pbr) { | |
1985 | if (BGP_DEBUG(pbr, PBR_ERROR)) | |
1986 | zlog_err("%s: entry %p already installed in bgp pbr", | |
1987 | __func__, info); | |
1988 | return; | |
1989 | } | |
1990 | ||
1991 | if (bgp_pbr_build_and_validate_entry(p, info, &api) < 0) { | |
1992 | if (BGP_DEBUG(pbr, PBR_ERROR)) | |
1993 | zlog_err("%s: cancel updating entry %p in bgp pbr", | |
1994 | __func__, info); | |
2749b788 PG |
1995 | return; |
1996 | } | |
ed132710 | 1997 | bgp_pbr_handle_entry(bgp, info, &api, nlri_update); |
2749b788 | 1998 | } |
aa97cd11 PG |
1999 | |
2000 | int bgp_pbr_interface_compare(const struct bgp_pbr_interface *a, | |
2001 | const struct bgp_pbr_interface *b) | |
2002 | { | |
2003 | return strcmp(a->name, b->name); | |
2004 | } | |
2005 | ||
2006 | struct bgp_pbr_interface *bgp_pbr_interface_lookup(const char *name, | |
2007 | struct bgp_pbr_interface_head *head) | |
2008 | { | |
2009 | struct bgp_pbr_interface pbr_if; | |
2010 | ||
2011 | strlcpy(pbr_if.name, name, sizeof(pbr_if.name)); | |
2012 | return (RB_FIND(bgp_pbr_interface_head, | |
2013 | head, &pbr_if)); | |
2014 | } | |
2015 | ||
2016 | /* this function resets to the default policy routing | |
2017 | * go back to default status | |
2018 | */ | |
2019 | void bgp_pbr_reset(struct bgp *bgp, afi_t afi) | |
2020 | { | |
2021 | struct bgp_pbr_config *bgp_pbr_cfg = bgp->bgp_pbr_cfg; | |
2022 | struct bgp_pbr_interface_head *head; | |
2023 | struct bgp_pbr_interface *pbr_if; | |
2024 | ||
2025 | if (!bgp_pbr_cfg || afi != AFI_IP) | |
2026 | return; | |
2027 | head = &(bgp_pbr_cfg->ifaces_by_name_ipv4); | |
2028 | ||
2029 | while (!RB_EMPTY(bgp_pbr_interface_head, head)) { | |
2030 | pbr_if = RB_ROOT(bgp_pbr_interface_head, head); | |
2031 | RB_REMOVE(bgp_pbr_interface_head, head, pbr_if); | |
2032 | XFREE(MTYPE_TMP, pbr_if); | |
2033 | } | |
2034 | } |