]>
Commit | Line | Data |
---|---|---|
064af421 | 1 | /* |
8368c090 | 2 | * Copyright (c) 2009, 2010, 2011 Nicira Networks. |
064af421 | 3 | * |
a14bc59f BP |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
064af421 | 7 | * |
a14bc59f BP |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
064af421 BP |
15 | */ |
16 | ||
17 | #include <config.h> | |
18 | #include "classifier.h" | |
19 | #include <assert.h> | |
20 | #include <errno.h> | |
21 | #include <netinet/in.h> | |
844dff32 | 22 | #include "byte-order.h" |
68d1c8c3 | 23 | #include "dynamic-string.h" |
064af421 BP |
24 | #include "flow.h" |
25 | #include "hash.h" | |
07b37e8f | 26 | #include "odp-util.h" |
d8ae4d67 | 27 | #include "ofp-util.h" |
b5d97350 | 28 | #include "packets.h" |
064af421 | 29 | |
b5d97350 BP |
30 | static struct cls_table *find_table(const struct classifier *, |
31 | const struct flow_wildcards *); | |
32 | static struct cls_table *insert_table(struct classifier *, | |
33 | const struct flow_wildcards *); | |
34 | ||
35 | static struct cls_table *classifier_first_table(const struct classifier *); | |
36 | static struct cls_table *classifier_next_table(const struct classifier *, | |
37 | const struct cls_table *); | |
38 | static void destroy_table(struct classifier *, struct cls_table *); | |
39 | ||
b5d97350 BP |
40 | static struct cls_rule *find_match(const struct cls_table *, |
41 | const struct flow *); | |
42 | static struct cls_rule *find_equal(struct cls_table *, const struct flow *, | |
43 | uint32_t hash); | |
44 | static struct cls_rule *insert_rule(struct cls_table *, struct cls_rule *); | |
45 | ||
46 | static bool flow_equal_except(const struct flow *, const struct flow *, | |
47 | const struct flow_wildcards *); | |
48 | static void zero_wildcards(struct flow *, const struct flow_wildcards *); | |
49 | ||
50 | /* Iterates RULE over HEAD and all of the cls_rules on HEAD->list. */ | |
51 | #define FOR_EACH_RULE_IN_LIST(RULE, HEAD) \ | |
52 | for ((RULE) = (HEAD); (RULE) != NULL; (RULE) = next_rule_in_list(RULE)) | |
53 | #define FOR_EACH_RULE_IN_LIST_SAFE(RULE, NEXT, HEAD) \ | |
54 | for ((RULE) = (HEAD); \ | |
55 | (RULE) != NULL && ((NEXT) = next_rule_in_list(RULE), true); \ | |
56 | (RULE) = (NEXT)) | |
57 | ||
955f579d | 58 | static struct cls_rule *next_rule_in_list__(struct cls_rule *); |
b5d97350 BP |
59 | static struct cls_rule *next_rule_in_list(struct cls_rule *); |
60 | ||
61 | static struct cls_table * | |
62 | cls_table_from_hmap_node(const struct hmap_node *node) | |
63 | { | |
64 | return node ? CONTAINER_OF(node, struct cls_table, hmap_node) : NULL; | |
65 | } | |
66 | ||
b63f2ea7 BP |
67 | /* Converts the flow in 'flow' into a cls_rule in 'rule', with the given |
68 | * 'wildcards' and 'priority'. */ | |
69 | void | |
70 | cls_rule_init(const struct flow *flow, const struct flow_wildcards *wildcards, | |
71 | unsigned int priority, struct cls_rule *rule) | |
b5d97350 BP |
72 | { |
73 | rule->flow = *flow; | |
b63f2ea7 BP |
74 | rule->wc = *wildcards; |
75 | rule->priority = priority; | |
52ce26ee | 76 | cls_rule_zero_wildcarded_fields(rule); |
b5d97350 | 77 | } |
064af421 | 78 | |
b63f2ea7 BP |
79 | /* Converts the flow in 'flow' into an exact-match cls_rule in 'rule', with the |
80 | * given 'priority'. (For OpenFlow 1.0, exact-match rule are always highest | |
81 | * priority, so 'priority' should be at least 65535.) */ | |
064af421 | 82 | void |
b63f2ea7 BP |
83 | cls_rule_init_exact(const struct flow *flow, |
84 | unsigned int priority, struct cls_rule *rule) | |
064af421 | 85 | { |
b63f2ea7 BP |
86 | rule->flow = *flow; |
87 | flow_wildcards_init_exact(&rule->wc); | |
064af421 | 88 | rule->priority = priority; |
064af421 BP |
89 | } |
90 | ||
844dff32 BP |
91 | /* Initializes 'rule' as a "catch-all" rule that matches every packet, with |
92 | * priority 'priority'. */ | |
93 | void | |
94 | cls_rule_init_catchall(struct cls_rule *rule, unsigned int priority) | |
95 | { | |
96 | memset(&rule->flow, 0, sizeof rule->flow); | |
d8ae4d67 | 97 | flow_wildcards_init_catchall(&rule->wc); |
844dff32 BP |
98 | rule->priority = priority; |
99 | } | |
100 | ||
b5d97350 BP |
101 | /* For each bit or field wildcarded in 'rule', sets the corresponding bit or |
102 | * field in 'flow' to all-0-bits. It is important to maintain this invariant | |
103 | * in a clr_rule that might be inserted into a classifier. | |
104 | * | |
105 | * It is never necessary to call this function directly for a cls_rule that is | |
106 | * initialized or modified only by cls_rule_*() functions. It is useful to | |
107 | * restore the invariant in a cls_rule whose 'wc' member is modified by hand. | |
108 | */ | |
109 | void | |
52ce26ee | 110 | cls_rule_zero_wildcarded_fields(struct cls_rule *rule) |
b5d97350 BP |
111 | { |
112 | zero_wildcards(&rule->flow, &rule->wc); | |
064af421 BP |
113 | } |
114 | ||
87542e21 BP |
115 | void |
116 | cls_rule_set_reg(struct cls_rule *rule, unsigned int reg_idx, uint32_t value) | |
117 | { | |
118 | cls_rule_set_reg_masked(rule, reg_idx, value, UINT32_MAX); | |
119 | } | |
120 | ||
121 | void | |
122 | cls_rule_set_reg_masked(struct cls_rule *rule, unsigned int reg_idx, | |
123 | uint32_t value, uint32_t mask) | |
124 | { | |
125 | assert(reg_idx < FLOW_N_REGS); | |
126 | flow_wildcards_set_reg_mask(&rule->wc, reg_idx, mask); | |
127 | rule->flow.regs[reg_idx] = value & mask; | |
128 | } | |
129 | ||
130 | void | |
b9298d3f | 131 | cls_rule_set_tun_id(struct cls_rule *rule, ovs_be64 tun_id) |
87542e21 | 132 | { |
8368c090 BP |
133 | cls_rule_set_tun_id_masked(rule, tun_id, htonll(UINT64_MAX)); |
134 | } | |
135 | ||
136 | void | |
137 | cls_rule_set_tun_id_masked(struct cls_rule *rule, | |
138 | ovs_be64 tun_id, ovs_be64 mask) | |
139 | { | |
140 | rule->wc.tun_id_mask = mask; | |
141 | rule->flow.tun_id = tun_id & mask; | |
87542e21 BP |
142 | } |
143 | ||
64420dfa | 144 | void |
abe529af | 145 | cls_rule_set_in_port(struct cls_rule *rule, uint16_t ofp_port) |
64420dfa | 146 | { |
d8ae4d67 | 147 | rule->wc.wildcards &= ~FWW_IN_PORT; |
abe529af | 148 | rule->flow.in_port = ofp_port; |
64420dfa BP |
149 | } |
150 | ||
151 | void | |
152 | cls_rule_set_dl_type(struct cls_rule *rule, ovs_be16 dl_type) | |
153 | { | |
d8ae4d67 | 154 | rule->wc.wildcards &= ~FWW_DL_TYPE; |
64420dfa BP |
155 | rule->flow.dl_type = dl_type; |
156 | } | |
157 | ||
158 | void | |
159 | cls_rule_set_dl_src(struct cls_rule *rule, const uint8_t dl_src[ETH_ADDR_LEN]) | |
160 | { | |
d8ae4d67 | 161 | rule->wc.wildcards &= ~FWW_DL_SRC; |
64420dfa BP |
162 | memcpy(rule->flow.dl_src, dl_src, ETH_ADDR_LEN); |
163 | } | |
164 | ||
db7f8281 | 165 | /* Modifies 'rule' so that the Ethernet address must match 'dl_dst' exactly. */ |
64420dfa BP |
166 | void |
167 | cls_rule_set_dl_dst(struct cls_rule *rule, const uint8_t dl_dst[ETH_ADDR_LEN]) | |
168 | { | |
d8ae4d67 | 169 | rule->wc.wildcards &= ~(FWW_DL_DST | FWW_ETH_MCAST); |
64420dfa BP |
170 | memcpy(rule->flow.dl_dst, dl_dst, ETH_ADDR_LEN); |
171 | } | |
172 | ||
db7f8281 BP |
173 | /* Modifies 'rule' so that the Ethernet address must match 'dl_dst' after each |
174 | * byte is ANDed with the appropriate byte in 'mask'. | |
175 | * | |
176 | * This function will assert-fail if 'mask' is invalid. Only 'mask' values | |
177 | * accepted by flow_wildcards_is_dl_dst_mask_valid() are allowed. */ | |
178 | void | |
179 | cls_rule_set_dl_dst_masked(struct cls_rule *rule, | |
180 | const uint8_t dl_dst[ETH_ADDR_LEN], | |
181 | const uint8_t mask[ETH_ADDR_LEN]) | |
182 | { | |
183 | flow_wildcards_t *wc = &rule->wc.wildcards; | |
184 | size_t i; | |
185 | ||
186 | *wc = flow_wildcards_set_dl_dst_mask(*wc, mask); | |
187 | for (i = 0; i < ETH_ADDR_LEN; i++) { | |
188 | rule->flow.dl_dst[i] = dl_dst[i] & mask[i]; | |
189 | } | |
190 | } | |
191 | ||
66642cb4 | 192 | void |
81c9dad2 BP |
193 | cls_rule_set_dl_tci(struct cls_rule *rule, ovs_be16 tci) |
194 | { | |
66642cb4 | 195 | cls_rule_set_dl_tci_masked(rule, tci, htons(0xffff)); |
81c9dad2 BP |
196 | } |
197 | ||
66642cb4 | 198 | void |
81c9dad2 BP |
199 | cls_rule_set_dl_tci_masked(struct cls_rule *rule, ovs_be16 tci, ovs_be16 mask) |
200 | { | |
66642cb4 BP |
201 | rule->flow.vlan_tci = tci & mask; |
202 | rule->wc.vlan_tci_mask = mask; | |
203 | } | |
81c9dad2 | 204 | |
66642cb4 BP |
205 | /* Modifies 'rule' so that the VLAN VID is wildcarded. If the PCP is already |
206 | * wildcarded, then 'rule' will match a packet regardless of whether it has an | |
207 | * 802.1Q header or not. */ | |
208 | void | |
209 | cls_rule_set_any_vid(struct cls_rule *rule) | |
210 | { | |
211 | if (rule->wc.vlan_tci_mask & htons(VLAN_PCP_MASK)) { | |
212 | rule->wc.vlan_tci_mask &= ~htons(VLAN_VID_MASK); | |
213 | rule->flow.vlan_tci &= ~htons(VLAN_VID_MASK); | |
214 | } else { | |
215 | cls_rule_set_dl_tci_masked(rule, htons(0), htons(0)); | |
81c9dad2 BP |
216 | } |
217 | } | |
218 | ||
66642cb4 BP |
219 | /* Modifies 'rule' depending on 'dl_vlan': |
220 | * | |
221 | * - If 'dl_vlan' is htons(OFP_VLAN_NONE), makes 'rule' match only packets | |
222 | * without an 802.1Q header. | |
223 | * | |
224 | * - Otherwise, makes 'rule' match only packets with an 802.1Q header whose | |
225 | * VID equals the low 12 bits of 'dl_vlan'. | |
226 | */ | |
81c9dad2 BP |
227 | void |
228 | cls_rule_set_dl_vlan(struct cls_rule *rule, ovs_be16 dl_vlan) | |
229 | { | |
66642cb4 BP |
230 | if (dl_vlan == htons(OFP_VLAN_NONE)) { |
231 | cls_rule_set_dl_tci(rule, htons(0)); | |
232 | } else { | |
81c9dad2 | 233 | dl_vlan &= htons(VLAN_VID_MASK); |
66642cb4 BP |
234 | rule->flow.vlan_tci &= ~htons(VLAN_VID_MASK); |
235 | rule->flow.vlan_tci |= htons(VLAN_CFI) | dl_vlan; | |
236 | rule->wc.vlan_tci_mask |= htons(VLAN_VID_MASK | VLAN_CFI); | |
81c9dad2 | 237 | } |
66642cb4 | 238 | } |
81c9dad2 | 239 | |
66642cb4 BP |
240 | /* Modifies 'rule' so that the VLAN PCP is wildcarded. If the VID is already |
241 | * wildcarded, then 'rule' will match a packet regardless of whether it has an | |
242 | * 802.1Q header or not. */ | |
243 | void | |
244 | cls_rule_set_any_pcp(struct cls_rule *rule) | |
245 | { | |
246 | if (rule->wc.vlan_tci_mask & htons(VLAN_VID_MASK)) { | |
247 | rule->wc.vlan_tci_mask &= ~htons(VLAN_PCP_MASK); | |
248 | rule->flow.vlan_tci &= ~htons(VLAN_PCP_MASK); | |
249 | } else { | |
250 | cls_rule_set_dl_tci_masked(rule, htons(0), htons(0)); | |
251 | } | |
81c9dad2 BP |
252 | } |
253 | ||
66642cb4 BP |
254 | /* Modifies 'rule' so that it matches only packets with an 802.1Q header whose |
255 | * PCP equals the low 3 bits of 'dl_vlan_pcp'. */ | |
81c9dad2 BP |
256 | void |
257 | cls_rule_set_dl_vlan_pcp(struct cls_rule *rule, uint8_t dl_vlan_pcp) | |
258 | { | |
66642cb4 BP |
259 | dl_vlan_pcp &= 0x07; |
260 | rule->flow.vlan_tci &= ~htons(VLAN_PCP_MASK); | |
261 | rule->flow.vlan_tci |= htons((dl_vlan_pcp << VLAN_PCP_SHIFT) | VLAN_CFI); | |
262 | rule->wc.vlan_tci_mask |= htons(VLAN_CFI | VLAN_PCP_MASK); | |
81c9dad2 BP |
263 | } |
264 | ||
64420dfa BP |
265 | void |
266 | cls_rule_set_tp_src(struct cls_rule *rule, ovs_be16 tp_src) | |
267 | { | |
d8ae4d67 | 268 | rule->wc.wildcards &= ~FWW_TP_SRC; |
64420dfa BP |
269 | rule->flow.tp_src = tp_src; |
270 | } | |
271 | ||
272 | void | |
273 | cls_rule_set_tp_dst(struct cls_rule *rule, ovs_be16 tp_dst) | |
274 | { | |
d8ae4d67 | 275 | rule->wc.wildcards &= ~FWW_TP_DST; |
64420dfa BP |
276 | rule->flow.tp_dst = tp_dst; |
277 | } | |
278 | ||
279 | void | |
280 | cls_rule_set_nw_proto(struct cls_rule *rule, uint8_t nw_proto) | |
281 | { | |
d8ae4d67 | 282 | rule->wc.wildcards &= ~FWW_NW_PROTO; |
64420dfa BP |
283 | rule->flow.nw_proto = nw_proto; |
284 | } | |
285 | ||
286 | void | |
287 | cls_rule_set_nw_src(struct cls_rule *rule, ovs_be32 nw_src) | |
288 | { | |
81c9dad2 BP |
289 | cls_rule_set_nw_src_masked(rule, nw_src, htonl(UINT32_MAX)); |
290 | } | |
291 | ||
292 | bool | |
293 | cls_rule_set_nw_src_masked(struct cls_rule *rule, ovs_be32 ip, ovs_be32 mask) | |
294 | { | |
295 | if (flow_wildcards_set_nw_src_mask(&rule->wc, mask)) { | |
296 | rule->flow.nw_src = ip & mask; | |
297 | return true; | |
298 | } else { | |
299 | return false; | |
300 | } | |
64420dfa BP |
301 | } |
302 | ||
303 | void | |
304 | cls_rule_set_nw_dst(struct cls_rule *rule, ovs_be32 nw_dst) | |
305 | { | |
81c9dad2 BP |
306 | cls_rule_set_nw_dst_masked(rule, nw_dst, htonl(UINT32_MAX)); |
307 | } | |
308 | ||
309 | bool | |
310 | cls_rule_set_nw_dst_masked(struct cls_rule *rule, ovs_be32 ip, ovs_be32 mask) | |
311 | { | |
312 | if (flow_wildcards_set_nw_dst_mask(&rule->wc, mask)) { | |
313 | rule->flow.nw_dst = ip & mask; | |
314 | return true; | |
315 | } else { | |
316 | return false; | |
317 | } | |
318 | } | |
319 | ||
320 | void | |
321 | cls_rule_set_nw_tos(struct cls_rule *rule, uint8_t nw_tos) | |
322 | { | |
d8ae4d67 | 323 | rule->wc.wildcards &= ~FWW_NW_TOS; |
81c9dad2 BP |
324 | rule->flow.nw_tos = nw_tos & IP_DSCP_MASK; |
325 | } | |
326 | ||
327 | void | |
328 | cls_rule_set_icmp_type(struct cls_rule *rule, uint8_t icmp_type) | |
329 | { | |
d8ae4d67 | 330 | rule->wc.wildcards &= ~FWW_TP_SRC; |
81c9dad2 BP |
331 | rule->flow.icmp_type = htons(icmp_type); |
332 | ||
333 | } | |
334 | ||
335 | void | |
336 | cls_rule_set_icmp_code(struct cls_rule *rule, uint8_t icmp_code) | |
337 | { | |
d8ae4d67 | 338 | rule->wc.wildcards &= ~FWW_TP_DST; |
81c9dad2 | 339 | rule->flow.icmp_code = htons(icmp_code); |
64420dfa BP |
340 | } |
341 | ||
bad68a99 JP |
342 | void |
343 | cls_rule_set_arp_sha(struct cls_rule *rule, const uint8_t sha[ETH_ADDR_LEN]) | |
344 | { | |
345 | rule->wc.wildcards &= ~FWW_ARP_SHA; | |
346 | memcpy(rule->flow.arp_sha, sha, ETH_ADDR_LEN); | |
347 | } | |
348 | ||
349 | void | |
350 | cls_rule_set_arp_tha(struct cls_rule *rule, const uint8_t tha[ETH_ADDR_LEN]) | |
351 | { | |
352 | rule->wc.wildcards &= ~FWW_ARP_THA; | |
353 | memcpy(rule->flow.arp_tha, tha, ETH_ADDR_LEN); | |
354 | } | |
355 | ||
d31f1109 JP |
356 | void |
357 | cls_rule_set_ipv6_src(struct cls_rule *rule, const struct in6_addr *src) | |
358 | { | |
359 | cls_rule_set_ipv6_src_masked(rule, src, &in6addr_exact); | |
360 | } | |
361 | ||
362 | bool | |
363 | cls_rule_set_ipv6_src_masked(struct cls_rule *rule, const struct in6_addr *src, | |
364 | const struct in6_addr *mask) | |
365 | { | |
366 | if (flow_wildcards_set_ipv6_src_mask(&rule->wc, mask)) { | |
367 | rule->flow.ipv6_src = ipv6_addr_bitand(src, mask); | |
368 | return true; | |
369 | } else { | |
370 | return false; | |
371 | } | |
372 | } | |
373 | ||
374 | void | |
375 | cls_rule_set_ipv6_dst(struct cls_rule *rule, const struct in6_addr *dst) | |
376 | { | |
377 | cls_rule_set_ipv6_dst_masked(rule, dst, &in6addr_exact); | |
378 | } | |
379 | ||
380 | bool | |
381 | cls_rule_set_ipv6_dst_masked(struct cls_rule *rule, const struct in6_addr *dst, | |
382 | const struct in6_addr *mask) | |
383 | { | |
384 | if (flow_wildcards_set_ipv6_dst_mask(&rule->wc, mask)) { | |
385 | rule->flow.ipv6_dst = ipv6_addr_bitand(dst, mask); | |
386 | return true; | |
387 | } else { | |
388 | return false; | |
389 | } | |
390 | } | |
391 | ||
685a51a5 JP |
392 | void |
393 | cls_rule_set_nd_target(struct cls_rule *rule, const struct in6_addr target) | |
394 | { | |
395 | rule->wc.wildcards &= ~FWW_ND_TARGET; | |
396 | rule->flow.nd_target = target; | |
397 | } | |
398 | ||
193eb874 BP |
399 | /* Returns true if 'a' and 'b' have the same priority, wildcard the same |
400 | * fields, and have the same values for fixed fields, otherwise false. */ | |
401 | bool | |
402 | cls_rule_equal(const struct cls_rule *a, const struct cls_rule *b) | |
403 | { | |
404 | return (a->priority == b->priority | |
405 | && flow_wildcards_equal(&a->wc, &b->wc) | |
406 | && flow_equal(&a->flow, &b->flow)); | |
407 | } | |
408 | ||
57452fdc BP |
409 | /* Returns a hash value for the flow, wildcards, and priority in 'rule', |
410 | * starting from 'basis'. */ | |
411 | uint32_t | |
412 | cls_rule_hash(const struct cls_rule *rule, uint32_t basis) | |
413 | { | |
414 | uint32_t h0 = flow_hash(&rule->flow, basis); | |
415 | uint32_t h1 = flow_wildcards_hash(&rule->wc, h0); | |
416 | return hash_int(rule->priority, h1); | |
417 | } | |
418 | ||
07b37e8f BP |
419 | static void |
420 | format_ip_netmask(struct ds *s, const char *name, ovs_be32 ip, | |
421 | ovs_be32 netmask) | |
422 | { | |
423 | if (netmask) { | |
424 | ds_put_format(s, "%s="IP_FMT, name, IP_ARGS(&ip)); | |
425 | if (netmask != htonl(UINT32_MAX)) { | |
426 | if (ip_is_cidr(netmask)) { | |
427 | int wcbits = ofputil_netmask_to_wcbits(netmask); | |
428 | ds_put_format(s, "/%d", 32 - wcbits); | |
429 | } else { | |
430 | ds_put_format(s, "/"IP_FMT, IP_ARGS(&netmask)); | |
431 | } | |
432 | } | |
433 | ds_put_char(s, ','); | |
434 | } | |
435 | } | |
436 | ||
d31f1109 JP |
437 | static void |
438 | format_ipv6_netmask(struct ds *s, const char *name, | |
439 | const struct in6_addr *addr, | |
440 | const struct in6_addr *netmask) | |
441 | { | |
442 | if (!ipv6_mask_is_any(netmask)) { | |
443 | ds_put_format(s, "%s=", name); | |
444 | print_ipv6_addr(s, addr); | |
445 | if (!ipv6_mask_is_exact(netmask)) { | |
446 | if (ipv6_is_cidr(netmask)) { | |
447 | int cidr_bits = ipv6_count_cidr_bits(netmask); | |
448 | ds_put_format(s, "/%d", cidr_bits); | |
449 | } else { | |
450 | ds_put_char(s, '/'); | |
451 | print_ipv6_addr(s, netmask); | |
452 | } | |
453 | } | |
454 | ds_put_char(s, ','); | |
455 | } | |
456 | } | |
457 | ||
07b37e8f BP |
458 | void |
459 | cls_rule_format(const struct cls_rule *rule, struct ds *s) | |
460 | { | |
461 | const struct flow_wildcards *wc = &rule->wc; | |
462 | size_t start_len = s->length; | |
463 | flow_wildcards_t w = wc->wildcards; | |
464 | const struct flow *f = &rule->flow; | |
465 | bool skip_type = false; | |
466 | bool skip_proto = false; | |
467 | ||
468 | int i; | |
469 | ||
8fe2b968 | 470 | if (rule->priority != OFP_DEFAULT_PRIORITY) { |
07b37e8f BP |
471 | ds_put_format(s, "priority=%d,", rule->priority); |
472 | } | |
473 | ||
474 | if (!(w & FWW_DL_TYPE)) { | |
475 | skip_type = true; | |
476 | if (f->dl_type == htons(ETH_TYPE_IP)) { | |
477 | if (!(w & FWW_NW_PROTO)) { | |
478 | skip_proto = true; | |
6767a2cc | 479 | if (f->nw_proto == IPPROTO_ICMP) { |
07b37e8f | 480 | ds_put_cstr(s, "icmp,"); |
6767a2cc | 481 | } else if (f->nw_proto == IPPROTO_TCP) { |
07b37e8f | 482 | ds_put_cstr(s, "tcp,"); |
6767a2cc | 483 | } else if (f->nw_proto == IPPROTO_UDP) { |
07b37e8f BP |
484 | ds_put_cstr(s, "udp,"); |
485 | } else { | |
486 | ds_put_cstr(s, "ip,"); | |
487 | skip_proto = false; | |
488 | } | |
489 | } else { | |
490 | ds_put_cstr(s, "ip,"); | |
491 | } | |
d31f1109 JP |
492 | } else if (f->dl_type == htons(ETH_TYPE_IPV6)) { |
493 | if (!(w & FWW_NW_PROTO)) { | |
494 | skip_proto = true; | |
495 | if (f->nw_proto == IPPROTO_ICMPV6) { | |
496 | ds_put_cstr(s, "icmp6,"); | |
497 | } else if (f->nw_proto == IPPROTO_TCP) { | |
498 | ds_put_cstr(s, "tcp6,"); | |
499 | } else if (f->nw_proto == IPPROTO_UDP) { | |
500 | ds_put_cstr(s, "udp6,"); | |
501 | } else { | |
502 | ds_put_cstr(s, "ipv6,"); | |
503 | skip_proto = false; | |
504 | } | |
505 | } else { | |
506 | ds_put_cstr(s, "ipv6,"); | |
507 | } | |
07b37e8f BP |
508 | } else if (f->dl_type == htons(ETH_TYPE_ARP)) { |
509 | ds_put_cstr(s, "arp,"); | |
510 | } else { | |
511 | skip_type = false; | |
512 | } | |
513 | } | |
514 | for (i = 0; i < FLOW_N_REGS; i++) { | |
515 | switch (wc->reg_masks[i]) { | |
516 | case 0: | |
517 | break; | |
518 | case UINT32_MAX: | |
519 | ds_put_format(s, "reg%d=0x%"PRIx32",", i, f->regs[i]); | |
520 | break; | |
521 | default: | |
522 | ds_put_format(s, "reg%d=0x%"PRIx32"/0x%"PRIx32",", | |
523 | i, f->regs[i], wc->reg_masks[i]); | |
524 | break; | |
525 | } | |
526 | } | |
8368c090 BP |
527 | switch (wc->tun_id_mask) { |
528 | case 0: | |
529 | break; | |
530 | case CONSTANT_HTONLL(UINT64_MAX): | |
531 | ds_put_format(s, "tun_id=%#"PRIx64",", ntohll(f->tun_id)); | |
532 | break; | |
533 | default: | |
534 | ds_put_format(s, "tun_id=%#"PRIx64"/%#"PRIx64",", | |
535 | ntohll(f->tun_id), ntohll(wc->tun_id_mask)); | |
536 | break; | |
07b37e8f BP |
537 | } |
538 | if (!(w & FWW_IN_PORT)) { | |
abe529af | 539 | ds_put_format(s, "in_port=%"PRIu16",", f->in_port); |
07b37e8f BP |
540 | } |
541 | if (wc->vlan_tci_mask) { | |
542 | ovs_be16 vid_mask = wc->vlan_tci_mask & htons(VLAN_VID_MASK); | |
543 | ovs_be16 pcp_mask = wc->vlan_tci_mask & htons(VLAN_PCP_MASK); | |
544 | ovs_be16 cfi = wc->vlan_tci_mask & htons(VLAN_CFI); | |
545 | ||
546 | if (cfi && f->vlan_tci & htons(VLAN_CFI) | |
547 | && (!vid_mask || vid_mask == htons(VLAN_VID_MASK)) | |
548 | && (!pcp_mask || pcp_mask == htons(VLAN_PCP_MASK)) | |
549 | && (vid_mask || pcp_mask)) { | |
550 | if (vid_mask) { | |
551 | ds_put_format(s, "dl_vlan=%"PRIu16",", | |
552 | vlan_tci_to_vid(f->vlan_tci)); | |
553 | } | |
554 | if (pcp_mask) { | |
555 | ds_put_format(s, "dl_vlan_pcp=%d,", | |
556 | vlan_tci_to_pcp(f->vlan_tci)); | |
557 | } | |
ce0307c4 BP |
558 | } else if (wc->vlan_tci_mask == htons(0xffff)) { |
559 | ds_put_format(s, "vlan_tci=0x%04"PRIx16",", ntohs(f->vlan_tci)); | |
07b37e8f BP |
560 | } else { |
561 | ds_put_format(s, "vlan_tci=0x%04"PRIx16"/0x%04"PRIx16",", | |
562 | ntohs(f->vlan_tci), ntohs(wc->vlan_tci_mask)); | |
563 | } | |
564 | } | |
565 | if (!(w & FWW_DL_SRC)) { | |
566 | ds_put_format(s, "dl_src="ETH_ADDR_FMT",", ETH_ADDR_ARGS(f->dl_src)); | |
567 | } | |
568 | switch (w & (FWW_DL_DST | FWW_ETH_MCAST)) { | |
569 | case 0: | |
570 | ds_put_format(s, "dl_dst="ETH_ADDR_FMT",", ETH_ADDR_ARGS(f->dl_dst)); | |
571 | break; | |
572 | case FWW_DL_DST: | |
573 | ds_put_format(s, "dl_dst="ETH_ADDR_FMT"/01:00:00:00:00:00,", | |
574 | ETH_ADDR_ARGS(f->dl_dst)); | |
575 | break; | |
576 | case FWW_ETH_MCAST: | |
577 | ds_put_format(s, "dl_dst="ETH_ADDR_FMT"/fe:ff:ff:ff:ff:ff,", | |
578 | ETH_ADDR_ARGS(f->dl_dst)); | |
579 | break; | |
580 | case FWW_DL_DST | FWW_ETH_MCAST: | |
581 | break; | |
582 | } | |
583 | if (!skip_type && !(w & FWW_DL_TYPE)) { | |
584 | ds_put_format(s, "dl_type=0x%04"PRIx16",", ntohs(f->dl_type)); | |
585 | } | |
d31f1109 JP |
586 | if (f->dl_type == htons(ETH_TYPE_IPV6)) { |
587 | format_ipv6_netmask(s, "ipv6_src", &f->ipv6_src, &wc->ipv6_src_mask); | |
588 | format_ipv6_netmask(s, "ipv6_dst", &f->ipv6_dst, &wc->ipv6_dst_mask); | |
589 | } else { | |
590 | format_ip_netmask(s, "nw_src", f->nw_src, wc->nw_src_mask); | |
591 | format_ip_netmask(s, "nw_dst", f->nw_dst, wc->nw_dst_mask); | |
592 | } | |
07b37e8f BP |
593 | if (!skip_proto && !(w & FWW_NW_PROTO)) { |
594 | if (f->dl_type == htons(ETH_TYPE_ARP)) { | |
fb115f91 | 595 | ds_put_format(s, "arp_op=%"PRIu8",", f->nw_proto); |
07b37e8f | 596 | } else { |
92ec5741 | 597 | ds_put_format(s, "nw_proto=%"PRIu8",", f->nw_proto); |
07b37e8f BP |
598 | } |
599 | } | |
bad68a99 JP |
600 | if (f->dl_type == htons(ETH_TYPE_ARP)) { |
601 | if (!(w & FWW_ARP_SHA)) { | |
602 | ds_put_format(s, "arp_sha="ETH_ADDR_FMT",", | |
603 | ETH_ADDR_ARGS(f->arp_sha)); | |
604 | } | |
605 | if (!(w & FWW_ARP_THA)) { | |
606 | ds_put_format(s, "arp_tha="ETH_ADDR_FMT",", | |
607 | ETH_ADDR_ARGS(f->arp_tha)); | |
608 | } | |
609 | } | |
07b37e8f BP |
610 | if (!(w & FWW_NW_TOS)) { |
611 | ds_put_format(s, "nw_tos=%"PRIu8",", f->nw_tos); | |
612 | } | |
6767a2cc | 613 | if (f->nw_proto == IPPROTO_ICMP) { |
07b37e8f | 614 | if (!(w & FWW_TP_SRC)) { |
92ec5741 | 615 | ds_put_format(s, "icmp_type=%"PRIu16",", ntohs(f->tp_src)); |
07b37e8f BP |
616 | } |
617 | if (!(w & FWW_TP_DST)) { | |
92ec5741 | 618 | ds_put_format(s, "icmp_code=%"PRIu16",", ntohs(f->tp_dst)); |
07b37e8f | 619 | } |
d31f1109 JP |
620 | } else if (f->nw_proto == IPPROTO_ICMPV6) { |
621 | if (!(w & FWW_TP_SRC)) { | |
622 | ds_put_format(s, "icmp_type=%"PRIu16",", ntohs(f->tp_src)); | |
623 | } | |
624 | if (!(w & FWW_TP_DST)) { | |
625 | ds_put_format(s, "icmp_code=%"PRIu16",", ntohs(f->tp_dst)); | |
626 | } | |
685a51a5 JP |
627 | if (!(w & FWW_ND_TARGET)) { |
628 | ds_put_cstr(s, "nd_target="); | |
629 | print_ipv6_addr(s, &f->nd_target); | |
630 | ds_put_char(s, ','); | |
631 | } | |
632 | if (!(w & FWW_ARP_SHA)) { | |
633 | ds_put_format(s, "nd_sll="ETH_ADDR_FMT",", | |
634 | ETH_ADDR_ARGS(f->arp_sha)); | |
635 | } | |
636 | if (!(w & FWW_ARP_THA)) { | |
637 | ds_put_format(s, "nd_tll="ETH_ADDR_FMT",", | |
638 | ETH_ADDR_ARGS(f->arp_tha)); | |
639 | } | |
640 | } else { | |
07b37e8f | 641 | if (!(w & FWW_TP_SRC)) { |
92ec5741 | 642 | ds_put_format(s, "tp_src=%"PRIu16",", ntohs(f->tp_src)); |
07b37e8f BP |
643 | } |
644 | if (!(w & FWW_TP_DST)) { | |
92ec5741 | 645 | ds_put_format(s, "tp_dst=%"PRIu16",", ntohs(f->tp_dst)); |
07b37e8f BP |
646 | } |
647 | } | |
648 | ||
649 | if (s->length > start_len && ds_last(s) == ',') { | |
650 | s->length--; | |
651 | } | |
652 | } | |
653 | ||
68d1c8c3 BP |
654 | /* Converts 'rule' to a string and returns the string. The caller must free |
655 | * the string (with free()). */ | |
656 | char * | |
657 | cls_rule_to_string(const struct cls_rule *rule) | |
658 | { | |
659 | struct ds s = DS_EMPTY_INITIALIZER; | |
07b37e8f BP |
660 | cls_rule_format(rule, &s); |
661 | return ds_steal_cstr(&s); | |
68d1c8c3 BP |
662 | } |
663 | ||
064af421 BP |
664 | void |
665 | cls_rule_print(const struct cls_rule *rule) | |
666 | { | |
07b37e8f BP |
667 | char *s = cls_rule_to_string(rule); |
668 | puts(s); | |
669 | free(s); | |
064af421 | 670 | } |
064af421 BP |
671 | \f |
672 | /* Initializes 'cls' as a classifier that initially contains no classification | |
673 | * rules. */ | |
674 | void | |
675 | classifier_init(struct classifier *cls) | |
676 | { | |
064af421 | 677 | cls->n_rules = 0; |
b5d97350 | 678 | hmap_init(&cls->tables); |
064af421 BP |
679 | } |
680 | ||
681 | /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the | |
682 | * caller's responsibility. */ | |
683 | void | |
684 | classifier_destroy(struct classifier *cls) | |
685 | { | |
686 | if (cls) { | |
b5d97350 | 687 | struct cls_table *table, *next_table; |
064af421 | 688 | |
b5d97350 BP |
689 | HMAP_FOR_EACH_SAFE (table, next_table, hmap_node, &cls->tables) { |
690 | hmap_destroy(&table->rules); | |
691 | hmap_remove(&cls->tables, &table->hmap_node); | |
692 | free(table); | |
064af421 | 693 | } |
b5d97350 | 694 | hmap_destroy(&cls->tables); |
064af421 BP |
695 | } |
696 | } | |
697 | ||
b5d97350 | 698 | /* Returns true if 'cls' contains no classification rules, false otherwise. */ |
064af421 BP |
699 | bool |
700 | classifier_is_empty(const struct classifier *cls) | |
701 | { | |
702 | return cls->n_rules == 0; | |
703 | } | |
704 | ||
705 | /* Returns the number of rules in 'classifier'. */ | |
706 | int | |
707 | classifier_count(const struct classifier *cls) | |
708 | { | |
709 | return cls->n_rules; | |
710 | } | |
711 | ||
b5d97350 BP |
712 | /* Inserts 'rule' into 'cls'. Until 'rule' is removed from 'cls', the caller |
713 | * must not modify or free it. | |
064af421 BP |
714 | * |
715 | * If 'cls' already contains an identical rule (including wildcards, values of | |
716 | * fixed fields, and priority), replaces the old rule by 'rule' and returns the | |
717 | * rule that was replaced. The caller takes ownership of the returned rule and | |
718 | * is thus responsible for freeing it, etc., as necessary. | |
719 | * | |
720 | * Returns NULL if 'cls' does not contain a rule with an identical key, after | |
721 | * inserting the new rule. In this case, no rules are displaced by the new | |
722 | * rule, even rules that cannot have any effect because the new rule matches a | |
723 | * superset of their flows and has higher priority. */ | |
724 | struct cls_rule * | |
08944c1d | 725 | classifier_replace(struct classifier *cls, struct cls_rule *rule) |
064af421 | 726 | { |
b5d97350 BP |
727 | struct cls_rule *old_rule; |
728 | struct cls_table *table; | |
729 | ||
730 | table = find_table(cls, &rule->wc); | |
731 | if (!table) { | |
732 | table = insert_table(cls, &rule->wc); | |
733 | } | |
734 | ||
735 | old_rule = insert_rule(table, rule); | |
736 | if (!old_rule) { | |
737 | table->n_table_rules++; | |
064af421 BP |
738 | cls->n_rules++; |
739 | } | |
b5d97350 | 740 | return old_rule; |
064af421 BP |
741 | } |
742 | ||
08944c1d BP |
743 | /* Inserts 'rule' into 'cls'. Until 'rule' is removed from 'cls', the caller |
744 | * must not modify or free it. | |
745 | * | |
746 | * 'cls' must not contain an identical rule (including wildcards, values of | |
747 | * fixed fields, and priority). Use classifier_find_rule_exactly() to find | |
748 | * such a rule. */ | |
749 | void | |
750 | classifier_insert(struct classifier *cls, struct cls_rule *rule) | |
751 | { | |
752 | struct cls_rule *displaced_rule = classifier_replace(cls, rule); | |
753 | assert(!displaced_rule); | |
754 | } | |
755 | ||
b5d97350 BP |
756 | /* Removes 'rule' from 'cls'. It is the caller's responsibility to free |
757 | * 'rule', if this is desirable. */ | |
064af421 BP |
758 | void |
759 | classifier_remove(struct classifier *cls, struct cls_rule *rule) | |
760 | { | |
b5d97350 BP |
761 | struct cls_rule *head; |
762 | struct cls_table *table; | |
064af421 | 763 | |
b5d97350 BP |
764 | table = find_table(cls, &rule->wc); |
765 | head = find_equal(table, &rule->flow, rule->hmap_node.hash); | |
766 | if (head != rule) { | |
767 | list_remove(&rule->list); | |
768 | } else if (list_is_empty(&rule->list)) { | |
769 | hmap_remove(&table->rules, &rule->hmap_node); | |
770 | } else { | |
771 | struct cls_rule *next = CONTAINER_OF(rule->list.next, | |
772 | struct cls_rule, list); | |
064af421 | 773 | |
b5d97350 BP |
774 | list_remove(&rule->list); |
775 | hmap_replace(&table->rules, &rule->hmap_node, &next->hmap_node); | |
776 | } | |
064af421 | 777 | |
f6acdb44 | 778 | if (--table->n_table_rules == 0) { |
b5d97350 | 779 | destroy_table(cls, table); |
064af421 | 780 | } |
b5d97350 BP |
781 | |
782 | cls->n_rules--; | |
064af421 BP |
783 | } |
784 | ||
48c3de13 BP |
785 | /* Finds and returns the highest-priority rule in 'cls' that matches 'flow'. |
786 | * Returns a null pointer if no rules in 'cls' match 'flow'. If multiple rules | |
3c4486a5 | 787 | * of equal priority match 'flow', returns one arbitrarily. */ |
48c3de13 | 788 | struct cls_rule * |
3c4486a5 | 789 | classifier_lookup(const struct classifier *cls, const struct flow *flow) |
48c3de13 | 790 | { |
b5d97350 BP |
791 | struct cls_table *table; |
792 | struct cls_rule *best; | |
48c3de13 | 793 | |
b5d97350 BP |
794 | best = NULL; |
795 | HMAP_FOR_EACH (table, hmap_node, &cls->tables) { | |
3c4486a5 BP |
796 | struct cls_rule *rule = find_match(table, flow); |
797 | if (rule && (!best || rule->priority > best->priority)) { | |
798 | best = rule; | |
b5d97350 | 799 | } |
48c3de13 | 800 | } |
b5d97350 | 801 | return best; |
48c3de13 BP |
802 | } |
803 | ||
b5d97350 BP |
804 | /* Finds and returns a rule in 'cls' with exactly the same priority and |
805 | * matching criteria as 'target'. Returns a null pointer if 'cls' doesn't | |
c084ce1d | 806 | * contain an exact match. */ |
064af421 BP |
807 | struct cls_rule * |
808 | classifier_find_rule_exactly(const struct classifier *cls, | |
76ecc721 | 809 | const struct cls_rule *target) |
064af421 | 810 | { |
b5d97350 BP |
811 | struct cls_rule *head, *rule; |
812 | struct cls_table *table; | |
064af421 | 813 | |
b5d97350 BP |
814 | table = find_table(cls, &target->wc); |
815 | if (!table) { | |
816 | return NULL; | |
064af421 BP |
817 | } |
818 | ||
b5d97350 | 819 | head = find_equal(table, &target->flow, flow_hash(&target->flow, 0)); |
b5d97350 BP |
820 | FOR_EACH_RULE_IN_LIST (rule, head) { |
821 | if (target->priority >= rule->priority) { | |
822 | return target->priority == rule->priority ? rule : NULL; | |
064af421 BP |
823 | } |
824 | } | |
825 | return NULL; | |
826 | } | |
827 | ||
faa50f40 BP |
828 | /* Checks if 'target' would overlap any other rule in 'cls'. Two rules are |
829 | * considered to overlap if both rules have the same priority and a packet | |
830 | * could match both. */ | |
49bdc010 JP |
831 | bool |
832 | classifier_rule_overlaps(const struct classifier *cls, | |
faa50f40 | 833 | const struct cls_rule *target) |
49bdc010 | 834 | { |
b5d97350 | 835 | struct cls_table *table; |
49bdc010 | 836 | |
b5d97350 BP |
837 | HMAP_FOR_EACH (table, hmap_node, &cls->tables) { |
838 | struct flow_wildcards wc; | |
839 | struct cls_rule *head; | |
49bdc010 | 840 | |
b5d97350 BP |
841 | flow_wildcards_combine(&wc, &target->wc, &table->wc); |
842 | HMAP_FOR_EACH (head, hmap_node, &table->rules) { | |
49bdc010 JP |
843 | struct cls_rule *rule; |
844 | ||
b5d97350 | 845 | FOR_EACH_RULE_IN_LIST (rule, head) { |
faa50f40 | 846 | if (rule->priority == target->priority |
b5d97350 | 847 | && flow_equal_except(&target->flow, &rule->flow, &wc)) { |
49bdc010 JP |
848 | return true; |
849 | } | |
850 | } | |
851 | } | |
852 | } | |
853 | ||
854 | return false; | |
855 | } | |
b5d97350 | 856 | \f |
5ecc9d81 BP |
857 | /* Iteration. */ |
858 | ||
859 | static bool | |
860 | rule_matches(const struct cls_rule *rule, const struct cls_rule *target) | |
861 | { | |
862 | return (!target | |
863 | || flow_equal_except(&rule->flow, &target->flow, &target->wc)); | |
864 | } | |
865 | ||
866 | static struct cls_rule * | |
867 | search_table(const struct cls_table *table, const struct cls_rule *target) | |
868 | { | |
869 | if (!target || !flow_wildcards_has_extra(&table->wc, &target->wc)) { | |
870 | struct cls_rule *rule; | |
871 | ||
872 | HMAP_FOR_EACH (rule, hmap_node, &table->rules) { | |
873 | if (rule_matches(rule, target)) { | |
874 | return rule; | |
875 | } | |
876 | } | |
877 | } | |
878 | return NULL; | |
879 | } | |
880 | ||
881 | /* Initializes 'cursor' for iterating through 'cls' rules that exactly match | |
882 | * 'target' or are more specific than 'target'. That is, a given 'rule' | |
883 | * matches 'target' if, for every field: | |
884 | * | |
885 | * - 'target' and 'rule' specify the same (non-wildcarded) value for the | |
886 | * field, or | |
887 | * | |
888 | * - 'target' wildcards the field, | |
889 | * | |
890 | * but not if: | |
891 | * | |
892 | * - 'target' and 'rule' specify different values for the field, or | |
893 | * | |
894 | * - 'target' specifies a value for the field but 'rule' wildcards it. | |
895 | * | |
896 | * Equivalently, the truth table for whether a field matches is: | |
897 | * | |
898 | * rule | |
899 | * | |
900 | * wildcard exact | |
901 | * +---------+---------+ | |
902 | * t wild | yes | yes | | |
903 | * a card | | | | |
904 | * r +---------+---------+ | |
905 | * g exact | no |if values| | |
906 | * e | |are equal| | |
907 | * t +---------+---------+ | |
908 | * | |
909 | * This is the matching rule used by OpenFlow 1.0 non-strict OFPT_FLOW_MOD | |
910 | * commands and by OpenFlow 1.0 aggregate and flow stats. | |
911 | * | |
912 | * Ignores target->priority. | |
913 | * | |
914 | * 'target' may be NULL to iterate over every rule in 'cls'. */ | |
915 | void | |
916 | cls_cursor_init(struct cls_cursor *cursor, const struct classifier *cls, | |
917 | const struct cls_rule *target) | |
918 | { | |
919 | cursor->cls = cls; | |
920 | cursor->target = target; | |
921 | } | |
922 | ||
923 | /* Returns the first matching cls_rule in 'cursor''s iteration, or a null | |
924 | * pointer if there are no matches. */ | |
925 | struct cls_rule * | |
926 | cls_cursor_first(struct cls_cursor *cursor) | |
927 | { | |
928 | struct cls_table *table; | |
929 | ||
930 | for (table = classifier_first_table(cursor->cls); table; | |
931 | table = classifier_next_table(cursor->cls, table)) { | |
932 | struct cls_rule *rule = search_table(table, cursor->target); | |
933 | if (rule) { | |
934 | cursor->table = table; | |
935 | return rule; | |
936 | } | |
937 | } | |
938 | ||
939 | return NULL; | |
940 | } | |
941 | ||
942 | /* Returns the next matching cls_rule in 'cursor''s iteration, or a null | |
943 | * pointer if there are no more matches. */ | |
944 | struct cls_rule * | |
945 | cls_cursor_next(struct cls_cursor *cursor, struct cls_rule *rule) | |
946 | { | |
947 | const struct cls_table *table; | |
948 | struct cls_rule *next; | |
949 | ||
955f579d BP |
950 | next = next_rule_in_list__(rule); |
951 | if (next->priority < rule->priority) { | |
5ecc9d81 BP |
952 | return next; |
953 | } | |
954 | ||
955f579d BP |
955 | /* 'next' is the head of the list, that is, the rule that is included in |
956 | * the table's hmap. (This is important when the classifier contains rules | |
957 | * that differ only in priority.) */ | |
958 | rule = next; | |
5ecc9d81 BP |
959 | HMAP_FOR_EACH_CONTINUE (rule, hmap_node, &cursor->table->rules) { |
960 | if (rule_matches(rule, cursor->target)) { | |
961 | return rule; | |
962 | } | |
963 | } | |
964 | ||
965 | for (table = classifier_next_table(cursor->cls, cursor->table); table; | |
966 | table = classifier_next_table(cursor->cls, table)) { | |
967 | rule = search_table(table, cursor->target); | |
968 | if (rule) { | |
969 | cursor->table = table; | |
970 | return rule; | |
971 | } | |
972 | } | |
973 | ||
974 | return NULL; | |
975 | } | |
976 | \f | |
b5d97350 BP |
977 | static struct cls_table * |
978 | find_table(const struct classifier *cls, const struct flow_wildcards *wc) | |
979 | { | |
980 | struct cls_table *table; | |
064af421 | 981 | |
1006cda6 | 982 | HMAP_FOR_EACH_IN_BUCKET (table, hmap_node, flow_wildcards_hash(wc, 0), |
b5d97350 BP |
983 | &cls->tables) { |
984 | if (flow_wildcards_equal(wc, &table->wc)) { | |
985 | return table; | |
064af421 BP |
986 | } |
987 | } | |
b5d97350 | 988 | return NULL; |
064af421 | 989 | } |
064af421 | 990 | |
b5d97350 BP |
991 | static struct cls_table * |
992 | insert_table(struct classifier *cls, const struct flow_wildcards *wc) | |
993 | { | |
994 | struct cls_table *table; | |
064af421 | 995 | |
b5d97350 BP |
996 | table = xzalloc(sizeof *table); |
997 | hmap_init(&table->rules); | |
998 | table->wc = *wc; | |
1006cda6 | 999 | hmap_insert(&cls->tables, &table->hmap_node, flow_wildcards_hash(wc, 0)); |
064af421 | 1000 | |
b5d97350 | 1001 | return table; |
064af421 BP |
1002 | } |
1003 | ||
b5d97350 BP |
1004 | static struct cls_table * |
1005 | classifier_first_table(const struct classifier *cls) | |
064af421 | 1006 | { |
b5d97350 | 1007 | return cls_table_from_hmap_node(hmap_first(&cls->tables)); |
064af421 BP |
1008 | } |
1009 | ||
b5d97350 BP |
1010 | static struct cls_table * |
1011 | classifier_next_table(const struct classifier *cls, | |
1012 | const struct cls_table *table) | |
064af421 | 1013 | { |
b5d97350 BP |
1014 | return cls_table_from_hmap_node(hmap_next(&cls->tables, |
1015 | &table->hmap_node)); | |
1016 | } | |
064af421 | 1017 | |
b5d97350 BP |
1018 | static void |
1019 | destroy_table(struct classifier *cls, struct cls_table *table) | |
1020 | { | |
1021 | hmap_remove(&cls->tables, &table->hmap_node); | |
1022 | hmap_destroy(&table->rules); | |
1023 | free(table); | |
1024 | } | |
064af421 | 1025 | |
064af421 | 1026 | static struct cls_rule * |
b5d97350 BP |
1027 | find_match(const struct cls_table *table, const struct flow *flow) |
1028 | { | |
1029 | struct cls_rule *rule; | |
1030 | struct flow f; | |
1031 | ||
1032 | f = *flow; | |
1033 | zero_wildcards(&f, &table->wc); | |
1034 | HMAP_FOR_EACH_WITH_HASH (rule, hmap_node, flow_hash(&f, 0), | |
1035 | &table->rules) { | |
1036 | if (flow_equal(&f, &rule->flow)) { | |
1037 | return rule; | |
064af421 BP |
1038 | } |
1039 | } | |
064af421 BP |
1040 | return NULL; |
1041 | } | |
1042 | ||
1043 | static struct cls_rule * | |
b5d97350 | 1044 | find_equal(struct cls_table *table, const struct flow *flow, uint32_t hash) |
064af421 | 1045 | { |
b5d97350 | 1046 | struct cls_rule *head; |
064af421 | 1047 | |
b5d97350 BP |
1048 | HMAP_FOR_EACH_WITH_HASH (head, hmap_node, hash, &table->rules) { |
1049 | if (flow_equal(&head->flow, flow)) { | |
1050 | return head; | |
064af421 BP |
1051 | } |
1052 | } | |
1053 | return NULL; | |
1054 | } | |
1055 | ||
b5d97350 BP |
1056 | static struct cls_rule * |
1057 | insert_rule(struct cls_table *table, struct cls_rule *new) | |
064af421 | 1058 | { |
b5d97350 | 1059 | struct cls_rule *head; |
064af421 | 1060 | |
b5d97350 | 1061 | new->hmap_node.hash = flow_hash(&new->flow, 0); |
064af421 | 1062 | |
b5d97350 BP |
1063 | head = find_equal(table, &new->flow, new->hmap_node.hash); |
1064 | if (!head) { | |
1065 | hmap_insert(&table->rules, &new->hmap_node, new->hmap_node.hash); | |
1066 | list_init(&new->list); | |
1067 | return NULL; | |
1068 | } else { | |
1069 | /* Scan the list for the insertion point that will keep the list in | |
1070 | * order of decreasing priority. */ | |
1071 | struct cls_rule *rule; | |
1072 | FOR_EACH_RULE_IN_LIST (rule, head) { | |
1073 | if (new->priority >= rule->priority) { | |
1074 | if (rule == head) { | |
1075 | /* 'new' is the new highest-priority flow in the list. */ | |
1076 | hmap_replace(&table->rules, | |
1077 | &rule->hmap_node, &new->hmap_node); | |
1078 | } | |
064af421 | 1079 | |
b5d97350 BP |
1080 | if (new->priority == rule->priority) { |
1081 | list_replace(&new->list, &rule->list); | |
1082 | return rule; | |
1083 | } else { | |
1084 | list_insert(&rule->list, &new->list); | |
1085 | return NULL; | |
1086 | } | |
1087 | } | |
1088 | } | |
064af421 | 1089 | |
b5d97350 BP |
1090 | /* Insert 'new' at the end of the list. */ |
1091 | list_push_back(&head->list, &new->list); | |
1092 | return NULL; | |
064af421 | 1093 | } |
064af421 BP |
1094 | } |
1095 | ||
b5d97350 | 1096 | static struct cls_rule * |
955f579d | 1097 | next_rule_in_list__(struct cls_rule *rule) |
064af421 | 1098 | { |
b5d97350 | 1099 | struct cls_rule *next = OBJECT_CONTAINING(rule->list.next, next, list); |
955f579d BP |
1100 | return next; |
1101 | } | |
1102 | ||
1103 | static struct cls_rule * | |
1104 | next_rule_in_list(struct cls_rule *rule) | |
1105 | { | |
1106 | struct cls_rule *next = next_rule_in_list__(rule); | |
b5d97350 | 1107 | return next->priority < rule->priority ? next : NULL; |
064af421 BP |
1108 | } |
1109 | ||
d31f1109 JP |
1110 | static bool |
1111 | ipv6_equal_except(const struct in6_addr *a, const struct in6_addr *b, | |
1112 | const struct in6_addr *mask) | |
1113 | { | |
1114 | int i; | |
1115 | ||
1116 | #ifdef s6_addr32 | |
1117 | for (i=0; i<4; i++) { | |
1118 | if ((a->s6_addr32[i] ^ b->s6_addr32[i]) & mask->s6_addr32[i]) { | |
1119 | return false; | |
1120 | } | |
1121 | } | |
1122 | #else | |
1123 | for (i=0; i<16; i++) { | |
1124 | if ((a->s6_addr[i] ^ b->s6_addr[i]) & mask->s6_addr[i]) { | |
1125 | return false; | |
1126 | } | |
1127 | } | |
1128 | #endif | |
1129 | ||
1130 | return true; | |
1131 | } | |
1132 | ||
1133 | ||
064af421 | 1134 | static bool |
b5d97350 BP |
1135 | flow_equal_except(const struct flow *a, const struct flow *b, |
1136 | const struct flow_wildcards *wildcards) | |
064af421 | 1137 | { |
d8ae4d67 | 1138 | const flow_wildcards_t wc = wildcards->wildcards; |
b6c9e612 | 1139 | int i; |
49bdc010 | 1140 | |
685a51a5 | 1141 | BUILD_ASSERT_DECL(FLOW_SIG_SIZE == 100 + FLOW_N_REGS * 4); |
b6c9e612 BP |
1142 | |
1143 | for (i = 0; i < FLOW_N_REGS; i++) { | |
1144 | if ((a->regs[i] ^ b->regs[i]) & wildcards->reg_masks[i]) { | |
1145 | return false; | |
1146 | } | |
1147 | } | |
b5d97350 | 1148 | |
8368c090 | 1149 | return (!((a->tun_id ^ b->tun_id) & wildcards->tun_id_mask) |
b5d97350 BP |
1150 | && !((a->nw_src ^ b->nw_src) & wildcards->nw_src_mask) |
1151 | && !((a->nw_dst ^ b->nw_dst) & wildcards->nw_dst_mask) | |
d8ae4d67 | 1152 | && (wc & FWW_IN_PORT || a->in_port == b->in_port) |
66642cb4 | 1153 | && !((a->vlan_tci ^ b->vlan_tci) & wildcards->vlan_tci_mask) |
d8ae4d67 BP |
1154 | && (wc & FWW_DL_TYPE || a->dl_type == b->dl_type) |
1155 | && (wc & FWW_TP_SRC || a->tp_src == b->tp_src) | |
1156 | && (wc & FWW_TP_DST || a->tp_dst == b->tp_dst) | |
1157 | && (wc & FWW_DL_SRC || eth_addr_equals(a->dl_src, b->dl_src)) | |
1158 | && (wc & FWW_DL_DST | |
1e37a2d7 BP |
1159 | || (!((a->dl_dst[0] ^ b->dl_dst[0]) & 0xfe) |
1160 | && a->dl_dst[1] == b->dl_dst[1] | |
1161 | && a->dl_dst[2] == b->dl_dst[2] | |
1162 | && a->dl_dst[3] == b->dl_dst[3] | |
1163 | && a->dl_dst[4] == b->dl_dst[4] | |
1164 | && a->dl_dst[5] == b->dl_dst[5])) | |
d8ae4d67 BP |
1165 | && (wc & FWW_ETH_MCAST |
1166 | || !((a->dl_dst[0] ^ b->dl_dst[0]) & 0x01)) | |
1167 | && (wc & FWW_NW_PROTO || a->nw_proto == b->nw_proto) | |
bad68a99 JP |
1168 | && (wc & FWW_NW_TOS || a->nw_tos == b->nw_tos) |
1169 | && (wc & FWW_ARP_SHA || eth_addr_equals(a->arp_sha, b->arp_sha)) | |
d31f1109 JP |
1170 | && (wc & FWW_ARP_THA || eth_addr_equals(a->arp_tha, b->arp_tha)) |
1171 | && ipv6_equal_except(&a->ipv6_src, &b->ipv6_src, | |
1172 | &wildcards->ipv6_src_mask) | |
1173 | && ipv6_equal_except(&a->ipv6_dst, &b->ipv6_dst, | |
685a51a5 JP |
1174 | &wildcards->ipv6_dst_mask) |
1175 | && (wc & FWW_ND_TARGET | |
1176 | || ipv6_addr_equals(&a->nd_target, &b->nd_target))); | |
064af421 BP |
1177 | } |
1178 | ||
b5d97350 BP |
1179 | static void |
1180 | zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) | |
064af421 | 1181 | { |
d8ae4d67 | 1182 | const flow_wildcards_t wc = wildcards->wildcards; |
b6c9e612 | 1183 | int i; |
064af421 | 1184 | |
685a51a5 | 1185 | BUILD_ASSERT_DECL(FLOW_SIG_SIZE == 100 + 4 * FLOW_N_REGS); |
064af421 | 1186 | |
b6c9e612 BP |
1187 | for (i = 0; i < FLOW_N_REGS; i++) { |
1188 | flow->regs[i] &= wildcards->reg_masks[i]; | |
1189 | } | |
8368c090 | 1190 | flow->tun_id &= wildcards->tun_id_mask; |
b5d97350 BP |
1191 | flow->nw_src &= wildcards->nw_src_mask; |
1192 | flow->nw_dst &= wildcards->nw_dst_mask; | |
d8ae4d67 | 1193 | if (wc & FWW_IN_PORT) { |
b5d97350 | 1194 | flow->in_port = 0; |
064af421 | 1195 | } |
66642cb4 | 1196 | flow->vlan_tci &= wildcards->vlan_tci_mask; |
d8ae4d67 | 1197 | if (wc & FWW_DL_TYPE) { |
b5d97350 BP |
1198 | flow->dl_type = 0; |
1199 | } | |
d8ae4d67 | 1200 | if (wc & FWW_TP_SRC) { |
b5d97350 BP |
1201 | flow->tp_src = 0; |
1202 | } | |
d8ae4d67 | 1203 | if (wc & FWW_TP_DST) { |
b5d97350 BP |
1204 | flow->tp_dst = 0; |
1205 | } | |
d8ae4d67 | 1206 | if (wc & FWW_DL_SRC) { |
b5d97350 BP |
1207 | memset(flow->dl_src, 0, sizeof flow->dl_src); |
1208 | } | |
d8ae4d67 | 1209 | if (wc & FWW_DL_DST) { |
1e37a2d7 BP |
1210 | flow->dl_dst[0] &= 0x01; |
1211 | memset(&flow->dl_dst[1], 0, 5); | |
1212 | } | |
1213 | if (wc & FWW_ETH_MCAST) { | |
1214 | flow->dl_dst[0] &= 0xfe; | |
b5d97350 | 1215 | } |
d8ae4d67 | 1216 | if (wc & FWW_NW_PROTO) { |
b5d97350 BP |
1217 | flow->nw_proto = 0; |
1218 | } | |
d8ae4d67 | 1219 | if (wc & FWW_NW_TOS) { |
b5d97350 | 1220 | flow->nw_tos = 0; |
064af421 | 1221 | } |
bad68a99 JP |
1222 | if (wc & FWW_ARP_SHA) { |
1223 | memset(flow->arp_sha, 0, sizeof flow->arp_sha); | |
1224 | } | |
1225 | if (wc & FWW_ARP_THA) { | |
1226 | memset(flow->arp_tha, 0, sizeof flow->arp_tha); | |
1227 | } | |
d31f1109 JP |
1228 | flow->ipv6_src = ipv6_addr_bitand(&flow->ipv6_src, |
1229 | &wildcards->ipv6_src_mask); | |
1230 | flow->ipv6_dst = ipv6_addr_bitand(&flow->ipv6_dst, | |
1231 | &wildcards->ipv6_dst_mask); | |
685a51a5 JP |
1232 | if (wc & FWW_ND_TARGET) { |
1233 | memset(&flow->nd_target, 0, sizeof flow->nd_target); | |
1234 | } | |
064af421 | 1235 | } |