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1 | /* | |
2 | * Copyright (c) 2011, 2012, 2013 Nicira, Inc. | |
3 | * | |
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: | |
7 | * | |
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. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | #include "meta-flow.h" | |
20 | ||
21 | #include <errno.h> | |
22 | #include <limits.h> | |
23 | #include <netinet/icmp6.h> | |
24 | #include <netinet/ip6.h> | |
25 | ||
26 | #include "classifier.h" | |
27 | #include "dynamic-string.h" | |
28 | #include "ofp-errors.h" | |
29 | #include "ofp-util.h" | |
30 | #include "ovs-thread.h" | |
31 | #include "packets.h" | |
32 | #include "random.h" | |
33 | #include "shash.h" | |
34 | #include "socket-util.h" | |
35 | #include "unaligned.h" | |
36 | #include "vlog.h" | |
37 | ||
38 | VLOG_DEFINE_THIS_MODULE(meta_flow); | |
39 | ||
40 | #define FLOW_U32OFS(FIELD) \ | |
41 | offsetof(struct flow, FIELD) % 4 ? -1 : offsetof(struct flow, FIELD) / 4 | |
42 | ||
43 | #define MF_FIELD_SIZES(MEMBER) \ | |
44 | sizeof ((union mf_value *)0)->MEMBER, \ | |
45 | 8 * sizeof ((union mf_value *)0)->MEMBER | |
46 | ||
47 | extern const struct mf_field mf_fields[MFF_N_IDS]; /* Silence a warning. */ | |
48 | ||
49 | const struct mf_field mf_fields[MFF_N_IDS] = { | |
50 | /* ## -------- ## */ | |
51 | /* ## metadata ## */ | |
52 | /* ## -------- ## */ | |
53 | ||
54 | { | |
55 | MFF_TUN_ID, "tun_id", "tunnel_id", | |
56 | MF_FIELD_SIZES(be64), | |
57 | MFM_FULLY, | |
58 | MFS_HEXADECIMAL, | |
59 | MFP_NONE, | |
60 | true, | |
61 | NXM_NX_TUN_ID, "NXM_NX_TUN_ID", | |
62 | OXM_OF_TUNNEL_ID, "OXM_OF_TUNNEL_ID", | |
63 | OFPUTIL_P_NXM_OXM_ANY, | |
64 | OFPUTIL_P_NXM_OXM_ANY, | |
65 | FLOW_U32OFS(tunnel.tun_id), | |
66 | }, { | |
67 | MFF_TUN_SRC, "tun_src", NULL, | |
68 | MF_FIELD_SIZES(be32), | |
69 | MFM_FULLY, | |
70 | MFS_IPV4, | |
71 | MFP_NONE, | |
72 | true, | |
73 | NXM_NX_TUN_IPV4_SRC, "NXM_NX_TUN_IPV4_SRC", | |
74 | NXM_NX_TUN_IPV4_SRC, "NXM_NX_TUN_IPV4_SRC", | |
75 | OFPUTIL_P_NXM_OXM_ANY, | |
76 | OFPUTIL_P_NXM_OXM_ANY, | |
77 | FLOW_U32OFS(tunnel.ip_src), | |
78 | }, { | |
79 | MFF_TUN_DST, "tun_dst", NULL, | |
80 | MF_FIELD_SIZES(be32), | |
81 | MFM_FULLY, | |
82 | MFS_IPV4, | |
83 | MFP_NONE, | |
84 | true, | |
85 | NXM_NX_TUN_IPV4_DST, "NXM_NX_TUN_IPV4_DST", | |
86 | NXM_NX_TUN_IPV4_DST, "NXM_NX_TUN_IPV4_DST", | |
87 | OFPUTIL_P_NXM_OXM_ANY, | |
88 | OFPUTIL_P_NXM_OXM_ANY, | |
89 | FLOW_U32OFS(tunnel.ip_dst), | |
90 | }, { | |
91 | MFF_TUN_FLAGS, "tun_flags", NULL, | |
92 | MF_FIELD_SIZES(be16), | |
93 | MFM_NONE, | |
94 | MFS_TNL_FLAGS, | |
95 | MFP_NONE, | |
96 | false, | |
97 | 0, NULL, | |
98 | 0, NULL, | |
99 | OFPUTIL_P_NONE, | |
100 | OFPUTIL_P_NONE, | |
101 | -1, | |
102 | }, { | |
103 | MFF_TUN_TTL, "tun_ttl", NULL, | |
104 | MF_FIELD_SIZES(u8), | |
105 | MFM_NONE, | |
106 | MFS_DECIMAL, | |
107 | MFP_NONE, | |
108 | false, | |
109 | 0, NULL, | |
110 | 0, NULL, | |
111 | OFPUTIL_P_NONE, | |
112 | OFPUTIL_P_NONE, | |
113 | -1, | |
114 | }, { | |
115 | MFF_TUN_TOS, "tun_tos", NULL, | |
116 | MF_FIELD_SIZES(u8), | |
117 | MFM_NONE, | |
118 | MFS_DECIMAL, | |
119 | MFP_NONE, | |
120 | false, | |
121 | 0, NULL, | |
122 | 0, NULL, | |
123 | OFPUTIL_P_NONE, | |
124 | OFPUTIL_P_NONE, | |
125 | -1, | |
126 | }, { | |
127 | MFF_METADATA, "metadata", NULL, | |
128 | MF_FIELD_SIZES(be64), | |
129 | MFM_FULLY, | |
130 | MFS_HEXADECIMAL, | |
131 | MFP_NONE, | |
132 | true, | |
133 | OXM_OF_METADATA, "OXM_OF_METADATA", | |
134 | OXM_OF_METADATA, "OXM_OF_METADATA", | |
135 | OFPUTIL_P_NXM_OF11_UP, | |
136 | OFPUTIL_P_NXM_OF11_UP, | |
137 | -1, | |
138 | }, { | |
139 | MFF_IN_PORT, "in_port", NULL, | |
140 | MF_FIELD_SIZES(be16), | |
141 | MFM_NONE, | |
142 | MFS_OFP_PORT, | |
143 | MFP_NONE, | |
144 | true, | |
145 | NXM_OF_IN_PORT, "NXM_OF_IN_PORT", | |
146 | NXM_OF_IN_PORT, "NXM_OF_IN_PORT", | |
147 | OFPUTIL_P_ANY, /* OF11+ via mapping to 32 bits. */ | |
148 | OFPUTIL_P_NONE, | |
149 | -1, | |
150 | }, { | |
151 | MFF_IN_PORT_OXM, "in_port_oxm", NULL, | |
152 | MF_FIELD_SIZES(be32), | |
153 | MFM_NONE, | |
154 | MFS_OFP_PORT_OXM, | |
155 | MFP_NONE, | |
156 | true, | |
157 | OXM_OF_IN_PORT, "OXM_OF_IN_PORT", | |
158 | OXM_OF_IN_PORT, "OXM_OF_IN_PORT", | |
159 | OFPUTIL_P_OF11_UP, | |
160 | OFPUTIL_P_NONE, | |
161 | -1, | |
162 | }, { | |
163 | MFF_SKB_PRIORITY, "skb_priority", NULL, | |
164 | MF_FIELD_SIZES(be32), | |
165 | MFM_NONE, | |
166 | MFS_HEXADECIMAL, | |
167 | MFP_NONE, | |
168 | false, | |
169 | 0, NULL, | |
170 | 0, NULL, | |
171 | OFPUTIL_P_NONE, | |
172 | OFPUTIL_P_NONE, | |
173 | -1, | |
174 | }, { | |
175 | MFF_PKT_MARK, "pkt_mark", NULL, | |
176 | MF_FIELD_SIZES(be32), | |
177 | MFM_FULLY, | |
178 | MFS_HEXADECIMAL, | |
179 | MFP_NONE, | |
180 | true, | |
181 | NXM_NX_PKT_MARK, "NXM_NX_PKT_MARK", | |
182 | NXM_NX_PKT_MARK, "NXM_NX_PKT_MARK", | |
183 | OFPUTIL_P_NXM_OXM_ANY, | |
184 | OFPUTIL_P_NXM_OXM_ANY, | |
185 | -1, | |
186 | }, | |
187 | ||
188 | #define REGISTER(IDX) \ | |
189 | { \ | |
190 | MFF_REG##IDX, "reg" #IDX, NULL, \ | |
191 | MF_FIELD_SIZES(be32), \ | |
192 | MFM_FULLY, \ | |
193 | MFS_HEXADECIMAL, \ | |
194 | MFP_NONE, \ | |
195 | true, \ | |
196 | NXM_NX_REG(IDX), "NXM_NX_REG" #IDX, \ | |
197 | NXM_NX_REG(IDX), "NXM_NX_REG" #IDX, \ | |
198 | OFPUTIL_P_NXM_OXM_ANY, \ | |
199 | OFPUTIL_P_NXM_OXM_ANY, \ | |
200 | -1, \ | |
201 | } | |
202 | #if FLOW_N_REGS > 0 | |
203 | REGISTER(0), | |
204 | #endif | |
205 | #if FLOW_N_REGS > 1 | |
206 | REGISTER(1), | |
207 | #endif | |
208 | #if FLOW_N_REGS > 2 | |
209 | REGISTER(2), | |
210 | #endif | |
211 | #if FLOW_N_REGS > 3 | |
212 | REGISTER(3), | |
213 | #endif | |
214 | #if FLOW_N_REGS > 4 | |
215 | REGISTER(4), | |
216 | #endif | |
217 | #if FLOW_N_REGS > 5 | |
218 | REGISTER(5), | |
219 | #endif | |
220 | #if FLOW_N_REGS > 6 | |
221 | REGISTER(6), | |
222 | #endif | |
223 | #if FLOW_N_REGS > 7 | |
224 | REGISTER(7), | |
225 | #endif | |
226 | #if FLOW_N_REGS > 8 | |
227 | #error | |
228 | #endif | |
229 | ||
230 | /* ## -- ## */ | |
231 | /* ## L2 ## */ | |
232 | /* ## -- ## */ | |
233 | ||
234 | { | |
235 | MFF_ETH_SRC, "eth_src", "dl_src", | |
236 | MF_FIELD_SIZES(mac), | |
237 | MFM_FULLY, | |
238 | MFS_ETHERNET, | |
239 | MFP_NONE, | |
240 | true, | |
241 | NXM_OF_ETH_SRC, "NXM_OF_ETH_SRC", | |
242 | OXM_OF_ETH_SRC, "OXM_OF_ETH_SRC", | |
243 | OFPUTIL_P_ANY, | |
244 | OFPUTIL_P_NXM_OF11_UP, /* Bitwise masking only with NXM and OF11+! */ | |
245 | -1, | |
246 | }, { | |
247 | MFF_ETH_DST, "eth_dst", "dl_dst", | |
248 | MF_FIELD_SIZES(mac), | |
249 | MFM_FULLY, | |
250 | MFS_ETHERNET, | |
251 | MFP_NONE, | |
252 | true, | |
253 | NXM_OF_ETH_DST, "NXM_OF_ETH_DST", | |
254 | OXM_OF_ETH_DST, "OXM_OF_ETH_DST", | |
255 | OFPUTIL_P_ANY, | |
256 | OFPUTIL_P_NXM_OF11_UP, /* Bitwise masking only with NXM and OF11+! */ | |
257 | -1, | |
258 | }, { | |
259 | MFF_ETH_TYPE, "eth_type", "dl_type", | |
260 | MF_FIELD_SIZES(be16), | |
261 | MFM_NONE, | |
262 | MFS_HEXADECIMAL, | |
263 | MFP_NONE, | |
264 | false, | |
265 | NXM_OF_ETH_TYPE, "NXM_OF_ETH_TYPE", | |
266 | OXM_OF_ETH_TYPE, "OXM_OF_ETH_TYPE", | |
267 | OFPUTIL_P_ANY, | |
268 | OFPUTIL_P_NONE, | |
269 | -1, | |
270 | }, | |
271 | ||
272 | { | |
273 | MFF_VLAN_TCI, "vlan_tci", NULL, | |
274 | MF_FIELD_SIZES(be16), | |
275 | MFM_FULLY, | |
276 | MFS_HEXADECIMAL, | |
277 | MFP_NONE, | |
278 | true, | |
279 | NXM_OF_VLAN_TCI, "NXM_OF_VLAN_TCI", | |
280 | NXM_OF_VLAN_TCI, "NXM_OF_VLAN_TCI", | |
281 | OFPUTIL_P_ANY, | |
282 | OFPUTIL_P_NXM_OXM_ANY, | |
283 | -1, | |
284 | }, { | |
285 | MFF_DL_VLAN, "dl_vlan", NULL, | |
286 | sizeof(ovs_be16), 12, | |
287 | MFM_NONE, | |
288 | MFS_DECIMAL, | |
289 | MFP_NONE, | |
290 | true, | |
291 | 0, NULL, | |
292 | 0, NULL, | |
293 | OFPUTIL_P_ANY, | |
294 | OFPUTIL_P_NXM_OXM_ANY, | |
295 | -1, | |
296 | }, { | |
297 | MFF_VLAN_VID, "vlan_vid", NULL, | |
298 | sizeof(ovs_be16), 12, | |
299 | MFM_FULLY, | |
300 | MFS_DECIMAL, | |
301 | MFP_NONE, | |
302 | true, | |
303 | OXM_OF_VLAN_VID, "OXM_OF_VLAN_VID", | |
304 | OXM_OF_VLAN_VID, "OXM_OF_VLAN_VID", | |
305 | OFPUTIL_P_ANY, | |
306 | OFPUTIL_P_NXM_OXM_ANY, | |
307 | -1, | |
308 | }, { | |
309 | MFF_DL_VLAN_PCP, "dl_vlan_pcp", NULL, | |
310 | 1, 3, | |
311 | MFM_NONE, | |
312 | MFS_DECIMAL, | |
313 | MFP_NONE, | |
314 | true, | |
315 | 0, NULL, | |
316 | 0, NULL, | |
317 | OFPUTIL_P_ANY, /* Will be mapped to NXM and OXM. */ | |
318 | OFPUTIL_P_NONE, | |
319 | -1, | |
320 | }, { | |
321 | MFF_VLAN_PCP, "vlan_pcp", NULL, | |
322 | 1, 3, | |
323 | MFM_NONE, | |
324 | MFS_DECIMAL, | |
325 | MFP_VLAN_VID, | |
326 | true, | |
327 | OXM_OF_VLAN_PCP, "OXM_OF_VLAN_PCP", | |
328 | OXM_OF_VLAN_PCP, "OXM_OF_VLAN_PCP", | |
329 | OFPUTIL_P_ANY, /* Will be mapped to OF10 and NXM. */ | |
330 | OFPUTIL_P_NONE, | |
331 | -1, | |
332 | }, | |
333 | ||
334 | /* ## ---- ## */ | |
335 | /* ## L2.5 ## */ | |
336 | /* ## ---- ## */ | |
337 | { | |
338 | MFF_MPLS_LABEL, "mpls_label", NULL, | |
339 | 4, 20, | |
340 | MFM_NONE, | |
341 | MFS_DECIMAL, | |
342 | MFP_MPLS, | |
343 | true, | |
344 | OXM_OF_MPLS_LABEL, "OXM_OF_MPLS_LABEL", | |
345 | OXM_OF_MPLS_LABEL, "OXM_OF_MPLS_LABEL", | |
346 | OFPUTIL_P_NXM_OF11_UP, | |
347 | OFPUTIL_P_NONE, | |
348 | -1, | |
349 | }, { | |
350 | MFF_MPLS_TC, "mpls_tc", NULL, | |
351 | 1, 3, | |
352 | MFM_NONE, | |
353 | MFS_DECIMAL, | |
354 | MFP_MPLS, | |
355 | true, | |
356 | OXM_OF_MPLS_TC, "OXM_OF_MPLS_TC", | |
357 | OXM_OF_MPLS_TC, "OXM_OF_MPLS_TC", | |
358 | OFPUTIL_P_NXM_OF11_UP, | |
359 | OFPUTIL_P_NONE, | |
360 | -1, | |
361 | }, { | |
362 | MFF_MPLS_BOS, "mpls_bos", NULL, | |
363 | 1, 1, | |
364 | MFM_NONE, | |
365 | MFS_DECIMAL, | |
366 | MFP_MPLS, | |
367 | false, | |
368 | OXM_OF_MPLS_BOS, "OXM_OF_MPLS_BOS", | |
369 | OXM_OF_MPLS_BOS, "OXM_OF_MPLS_BOS", | |
370 | OFPUTIL_P_NXM_OXM_ANY, | |
371 | OFPUTIL_P_NONE, | |
372 | -1, | |
373 | }, | |
374 | ||
375 | /* ## -- ## */ | |
376 | /* ## L3 ## */ | |
377 | /* ## -- ## */ | |
378 | ||
379 | { | |
380 | MFF_IPV4_SRC, "ip_src", "nw_src", | |
381 | MF_FIELD_SIZES(be32), | |
382 | MFM_FULLY, | |
383 | MFS_IPV4, | |
384 | MFP_IPV4, | |
385 | true, | |
386 | NXM_OF_IP_SRC, "NXM_OF_IP_SRC", | |
387 | OXM_OF_IPV4_SRC, "OXM_OF_IPV4_SRC", | |
388 | OFPUTIL_P_ANY, | |
389 | OFPUTIL_P_NXM_OF11_UP, | |
390 | FLOW_U32OFS(nw_src), | |
391 | }, { | |
392 | MFF_IPV4_DST, "ip_dst", "nw_dst", | |
393 | MF_FIELD_SIZES(be32), | |
394 | MFM_FULLY, | |
395 | MFS_IPV4, | |
396 | MFP_IPV4, | |
397 | true, | |
398 | NXM_OF_IP_DST, "NXM_OF_IP_DST", | |
399 | OXM_OF_IPV4_DST, "OXM_OF_IPV4_DST", | |
400 | OFPUTIL_P_ANY, | |
401 | OFPUTIL_P_NXM_OF11_UP, | |
402 | FLOW_U32OFS(nw_dst), | |
403 | }, | |
404 | ||
405 | { | |
406 | MFF_IPV6_SRC, "ipv6_src", NULL, | |
407 | MF_FIELD_SIZES(ipv6), | |
408 | MFM_FULLY, | |
409 | MFS_IPV6, | |
410 | MFP_IPV6, | |
411 | true, | |
412 | NXM_NX_IPV6_SRC, "NXM_NX_IPV6_SRC", | |
413 | OXM_OF_IPV6_SRC, "OXM_OF_IPV6_SRC", | |
414 | OFPUTIL_P_NXM_OXM_ANY, | |
415 | OFPUTIL_P_NXM_OXM_ANY, | |
416 | FLOW_U32OFS(ipv6_src), | |
417 | }, { | |
418 | MFF_IPV6_DST, "ipv6_dst", NULL, | |
419 | MF_FIELD_SIZES(ipv6), | |
420 | MFM_FULLY, | |
421 | MFS_IPV6, | |
422 | MFP_IPV6, | |
423 | true, | |
424 | NXM_NX_IPV6_DST, "NXM_NX_IPV6_DST", | |
425 | OXM_OF_IPV6_DST, "OXM_OF_IPV6_DST", | |
426 | OFPUTIL_P_NXM_OXM_ANY, | |
427 | OFPUTIL_P_NXM_OXM_ANY, | |
428 | FLOW_U32OFS(ipv6_dst), | |
429 | }, | |
430 | { | |
431 | MFF_IPV6_LABEL, "ipv6_label", NULL, | |
432 | 4, 20, | |
433 | MFM_FULLY, | |
434 | MFS_HEXADECIMAL, | |
435 | MFP_IPV6, | |
436 | false, | |
437 | NXM_NX_IPV6_LABEL, "NXM_NX_IPV6_LABEL", | |
438 | OXM_OF_IPV6_FLABEL, "OXM_OF_IPV6_FLABEL", | |
439 | OFPUTIL_P_NXM_OXM_ANY, | |
440 | OFPUTIL_P_NXM_OXM_ANY, | |
441 | -1, | |
442 | }, | |
443 | ||
444 | { | |
445 | MFF_IP_PROTO, "nw_proto", "ip_proto", | |
446 | MF_FIELD_SIZES(u8), | |
447 | MFM_NONE, | |
448 | MFS_DECIMAL, | |
449 | MFP_IP_ANY, | |
450 | false, | |
451 | NXM_OF_IP_PROTO, "NXM_OF_IP_PROTO", | |
452 | OXM_OF_IP_PROTO, "OXM_OF_IP_PROTO", | |
453 | OFPUTIL_P_ANY, | |
454 | OFPUTIL_P_NONE, | |
455 | -1, | |
456 | }, { | |
457 | MFF_IP_DSCP, "nw_tos", NULL, | |
458 | MF_FIELD_SIZES(u8), | |
459 | MFM_NONE, | |
460 | MFS_DECIMAL, | |
461 | MFP_IP_ANY, | |
462 | true, | |
463 | NXM_OF_IP_TOS, "NXM_OF_IP_TOS", | |
464 | NXM_OF_IP_TOS, "NXM_OF_IP_TOS", | |
465 | OFPUTIL_P_ANY, /* Will be shifted for OXM. */ | |
466 | OFPUTIL_P_NONE, | |
467 | -1, | |
468 | }, { | |
469 | MFF_IP_DSCP_SHIFTED, "ip_dscp", NULL, | |
470 | 1, 6, | |
471 | MFM_NONE, | |
472 | MFS_DECIMAL, | |
473 | MFP_IP_ANY, | |
474 | true, | |
475 | OXM_OF_IP_DSCP, "OXM_OF_IP_DSCP", | |
476 | OXM_OF_IP_DSCP, "OXM_OF_IP_DSCP", | |
477 | OFPUTIL_P_ANY, /* Will be shifted for non-OXM. */ | |
478 | OFPUTIL_P_NONE, | |
479 | -1, | |
480 | }, { | |
481 | MFF_IP_ECN, "nw_ecn", "ip_ecn", | |
482 | 1, 2, | |
483 | MFM_NONE, | |
484 | MFS_DECIMAL, | |
485 | MFP_IP_ANY, | |
486 | true, | |
487 | NXM_NX_IP_ECN, "NXM_NX_IP_ECN", | |
488 | OXM_OF_IP_ECN, "OXM_OF_IP_ECN", | |
489 | OFPUTIL_P_NXM_OXM_ANY, | |
490 | OFPUTIL_P_NONE, | |
491 | -1, | |
492 | }, { | |
493 | MFF_IP_TTL, "nw_ttl", NULL, | |
494 | MF_FIELD_SIZES(u8), | |
495 | MFM_NONE, | |
496 | MFS_DECIMAL, | |
497 | MFP_IP_ANY, | |
498 | true, | |
499 | NXM_NX_IP_TTL, "NXM_NX_IP_TTL", | |
500 | NXM_NX_IP_TTL, "NXM_NX_IP_TTL", | |
501 | OFPUTIL_P_NXM_OXM_ANY, | |
502 | OFPUTIL_P_NONE, | |
503 | -1, | |
504 | }, { | |
505 | MFF_IP_FRAG, "ip_frag", NULL, | |
506 | 1, 2, | |
507 | MFM_FULLY, | |
508 | MFS_FRAG, | |
509 | MFP_IP_ANY, | |
510 | false, | |
511 | NXM_NX_IP_FRAG, "NXM_NX_IP_FRAG", | |
512 | NXM_NX_IP_FRAG, "NXM_NX_IP_FRAG", | |
513 | OFPUTIL_P_NXM_OXM_ANY, | |
514 | OFPUTIL_P_NXM_OXM_ANY, | |
515 | -1, | |
516 | }, | |
517 | ||
518 | { | |
519 | MFF_ARP_OP, "arp_op", NULL, | |
520 | MF_FIELD_SIZES(be16), | |
521 | MFM_NONE, | |
522 | MFS_DECIMAL, | |
523 | MFP_ARP, | |
524 | true, | |
525 | NXM_OF_ARP_OP, "NXM_OF_ARP_OP", | |
526 | OXM_OF_ARP_OP, "OXM_OF_ARP_OP", | |
527 | OFPUTIL_P_ANY, | |
528 | OFPUTIL_P_NONE, | |
529 | -1, | |
530 | }, { | |
531 | MFF_ARP_SPA, "arp_spa", NULL, | |
532 | MF_FIELD_SIZES(be32), | |
533 | MFM_FULLY, | |
534 | MFS_IPV4, | |
535 | MFP_ARP, | |
536 | true, | |
537 | NXM_OF_ARP_SPA, "NXM_OF_ARP_SPA", | |
538 | OXM_OF_ARP_SPA, "OXM_OF_ARP_SPA", | |
539 | OFPUTIL_P_ANY, | |
540 | OFPUTIL_P_NXM_OF11_UP, | |
541 | -1, | |
542 | }, { | |
543 | MFF_ARP_TPA, "arp_tpa", NULL, | |
544 | MF_FIELD_SIZES(be32), | |
545 | MFM_FULLY, | |
546 | MFS_IPV4, | |
547 | MFP_ARP, | |
548 | true, | |
549 | NXM_OF_ARP_TPA, "NXM_OF_ARP_TPA", | |
550 | OXM_OF_ARP_TPA, "OXM_OF_ARP_TPA", | |
551 | OFPUTIL_P_ANY, | |
552 | OFPUTIL_P_NXM_OF11_UP, | |
553 | -1, | |
554 | }, { | |
555 | MFF_ARP_SHA, "arp_sha", NULL, | |
556 | MF_FIELD_SIZES(mac), | |
557 | MFM_FULLY, | |
558 | MFS_ETHERNET, | |
559 | MFP_ARP, | |
560 | true, | |
561 | NXM_NX_ARP_SHA, "NXM_NX_ARP_SHA", | |
562 | OXM_OF_ARP_SHA, "OXM_OF_ARP_SHA", | |
563 | OFPUTIL_P_NXM_OXM_ANY, | |
564 | OFPUTIL_P_NXM_OXM_ANY, | |
565 | -1, | |
566 | }, { | |
567 | MFF_ARP_THA, "arp_tha", NULL, | |
568 | MF_FIELD_SIZES(mac), | |
569 | MFM_FULLY, | |
570 | MFS_ETHERNET, | |
571 | MFP_ARP, | |
572 | true, | |
573 | NXM_NX_ARP_THA, "NXM_NX_ARP_THA", | |
574 | OXM_OF_ARP_THA, "OXM_OF_ARP_THA", | |
575 | OFPUTIL_P_NXM_OXM_ANY, | |
576 | OFPUTIL_P_NXM_OXM_ANY, | |
577 | -1, | |
578 | }, | |
579 | ||
580 | /* ## -- ## */ | |
581 | /* ## L4 ## */ | |
582 | /* ## -- ## */ | |
583 | ||
584 | { | |
585 | MFF_TCP_SRC, "tcp_src", "tp_src", | |
586 | MF_FIELD_SIZES(be16), | |
587 | MFM_FULLY, | |
588 | MFS_DECIMAL, | |
589 | MFP_TCP, | |
590 | true, | |
591 | NXM_OF_TCP_SRC, "NXM_OF_TCP_SRC", | |
592 | OXM_OF_TCP_SRC, "OXM_OF_TCP_SRC", | |
593 | OFPUTIL_P_ANY, | |
594 | OFPUTIL_P_NXM_OXM_ANY, | |
595 | -1, | |
596 | }, { | |
597 | MFF_TCP_DST, "tcp_dst", "tp_dst", | |
598 | MF_FIELD_SIZES(be16), | |
599 | MFM_FULLY, | |
600 | MFS_DECIMAL, | |
601 | MFP_TCP, | |
602 | true, | |
603 | NXM_OF_TCP_DST, "NXM_OF_TCP_DST", | |
604 | OXM_OF_TCP_DST, "OXM_OF_TCP_DST", | |
605 | OFPUTIL_P_ANY, | |
606 | OFPUTIL_P_NXM_OXM_ANY, | |
607 | -1, | |
608 | }, { | |
609 | MFF_TCP_FLAGS, "tcp_flags", NULL, | |
610 | 2, 12, | |
611 | MFM_FULLY, | |
612 | MFS_TCP_FLAGS, | |
613 | MFP_TCP, | |
614 | false, | |
615 | NXM_NX_TCP_FLAGS, "NXM_NX_TCP_FLAGS", | |
616 | NXM_NX_TCP_FLAGS, "NXM_NX_TCP_FLAGS", | |
617 | OFPUTIL_P_NXM_OXM_ANY, | |
618 | OFPUTIL_P_NXM_OXM_ANY, | |
619 | -1, | |
620 | }, | |
621 | ||
622 | { | |
623 | MFF_UDP_SRC, "udp_src", NULL, | |
624 | MF_FIELD_SIZES(be16), | |
625 | MFM_FULLY, | |
626 | MFS_DECIMAL, | |
627 | MFP_UDP, | |
628 | true, | |
629 | NXM_OF_UDP_SRC, "NXM_OF_UDP_SRC", | |
630 | OXM_OF_UDP_SRC, "OXM_OF_UDP_SRC", | |
631 | OFPUTIL_P_ANY, | |
632 | OFPUTIL_P_NXM_OXM_ANY, | |
633 | -1, | |
634 | }, { | |
635 | MFF_UDP_DST, "udp_dst", NULL, | |
636 | MF_FIELD_SIZES(be16), | |
637 | MFM_FULLY, | |
638 | MFS_DECIMAL, | |
639 | MFP_UDP, | |
640 | true, | |
641 | NXM_OF_UDP_DST, "NXM_OF_UDP_DST", | |
642 | OXM_OF_UDP_DST, "OXM_OF_UDP_DST", | |
643 | OFPUTIL_P_ANY, | |
644 | OFPUTIL_P_NXM_OXM_ANY, | |
645 | -1, | |
646 | }, | |
647 | ||
648 | { | |
649 | MFF_SCTP_SRC, "sctp_src", NULL, | |
650 | MF_FIELD_SIZES(be16), | |
651 | MFM_FULLY, | |
652 | MFS_DECIMAL, | |
653 | MFP_SCTP, | |
654 | true, | |
655 | OXM_OF_SCTP_SRC, "OXM_OF_SCTP_SRC", | |
656 | OXM_OF_SCTP_SRC, "OXM_OF_SCTP_SRC", | |
657 | OFPUTIL_P_NXM_OF11_UP, | |
658 | OFPUTIL_P_NXM_OXM_ANY, | |
659 | -1, | |
660 | }, { | |
661 | MFF_SCTP_DST, "sctp_dst", NULL, | |
662 | MF_FIELD_SIZES(be16), | |
663 | MFM_FULLY, | |
664 | MFS_DECIMAL, | |
665 | MFP_SCTP, | |
666 | true, | |
667 | OXM_OF_SCTP_DST, "OXM_OF_SCTP_DST", | |
668 | OXM_OF_SCTP_DST, "OXM_OF_SCTP_DST", | |
669 | OFPUTIL_P_NXM_OF11_UP, | |
670 | OFPUTIL_P_NXM_OXM_ANY, | |
671 | -1, | |
672 | }, | |
673 | ||
674 | { | |
675 | MFF_ICMPV4_TYPE, "icmp_type", NULL, | |
676 | MF_FIELD_SIZES(u8), | |
677 | MFM_NONE, | |
678 | MFS_DECIMAL, | |
679 | MFP_ICMPV4, | |
680 | false, | |
681 | NXM_OF_ICMP_TYPE, "NXM_OF_ICMP_TYPE", | |
682 | OXM_OF_ICMPV4_TYPE, "OXM_OF_ICMPV4_TYPE", | |
683 | OFPUTIL_P_ANY, | |
684 | OFPUTIL_P_NONE, | |
685 | -1, | |
686 | }, { | |
687 | MFF_ICMPV4_CODE, "icmp_code", NULL, | |
688 | MF_FIELD_SIZES(u8), | |
689 | MFM_NONE, | |
690 | MFS_DECIMAL, | |
691 | MFP_ICMPV4, | |
692 | false, | |
693 | NXM_OF_ICMP_CODE, "NXM_OF_ICMP_CODE", | |
694 | OXM_OF_ICMPV4_CODE, "OXM_OF_ICMPV4_CODE", | |
695 | OFPUTIL_P_ANY, | |
696 | OFPUTIL_P_NONE, | |
697 | -1, | |
698 | }, | |
699 | ||
700 | { | |
701 | MFF_ICMPV6_TYPE, "icmpv6_type", NULL, | |
702 | MF_FIELD_SIZES(u8), | |
703 | MFM_NONE, | |
704 | MFS_DECIMAL, | |
705 | MFP_ICMPV6, | |
706 | false, | |
707 | NXM_NX_ICMPV6_TYPE, "NXM_NX_ICMPV6_TYPE", | |
708 | OXM_OF_ICMPV6_TYPE, "OXM_OF_ICMPV6_TYPE", | |
709 | OFPUTIL_P_NXM_OXM_ANY, | |
710 | OFPUTIL_P_NONE, | |
711 | -1, | |
712 | }, { | |
713 | MFF_ICMPV6_CODE, "icmpv6_code", NULL, | |
714 | MF_FIELD_SIZES(u8), | |
715 | MFM_NONE, | |
716 | MFS_DECIMAL, | |
717 | MFP_ICMPV6, | |
718 | false, | |
719 | NXM_NX_ICMPV6_CODE, "NXM_NX_ICMPV6_CODE", | |
720 | OXM_OF_ICMPV6_CODE, "OXM_OF_ICMPV6_CODE", | |
721 | OFPUTIL_P_NXM_OXM_ANY, | |
722 | OFPUTIL_P_NONE, | |
723 | -1, | |
724 | }, | |
725 | ||
726 | /* ## ---- ## */ | |
727 | /* ## L"5" ## */ | |
728 | /* ## ---- ## */ | |
729 | ||
730 | { | |
731 | MFF_ND_TARGET, "nd_target", NULL, | |
732 | MF_FIELD_SIZES(ipv6), | |
733 | MFM_FULLY, | |
734 | MFS_IPV6, | |
735 | MFP_ND, | |
736 | false, | |
737 | NXM_NX_ND_TARGET, "NXM_NX_ND_TARGET", | |
738 | OXM_OF_IPV6_ND_TARGET, "OXM_OF_IPV6_ND_TARGET", | |
739 | OFPUTIL_P_NXM_OXM_ANY, | |
740 | OFPUTIL_P_NXM_OXM_ANY, | |
741 | -1, | |
742 | }, { | |
743 | MFF_ND_SLL, "nd_sll", NULL, | |
744 | MF_FIELD_SIZES(mac), | |
745 | MFM_FULLY, | |
746 | MFS_ETHERNET, | |
747 | MFP_ND_SOLICIT, | |
748 | false, | |
749 | NXM_NX_ND_SLL, "NXM_NX_ND_SLL", | |
750 | OXM_OF_IPV6_ND_SLL, "OXM_OF_IPV6_ND_SLL", | |
751 | OFPUTIL_P_NXM_OXM_ANY, | |
752 | OFPUTIL_P_NXM_OXM_ANY, | |
753 | -1, | |
754 | }, { | |
755 | MFF_ND_TLL, "nd_tll", NULL, | |
756 | MF_FIELD_SIZES(mac), | |
757 | MFM_FULLY, | |
758 | MFS_ETHERNET, | |
759 | MFP_ND_ADVERT, | |
760 | false, | |
761 | NXM_NX_ND_TLL, "NXM_NX_ND_TLL", | |
762 | OXM_OF_IPV6_ND_TLL, "OXM_OF_IPV6_ND_TLL", | |
763 | OFPUTIL_P_NXM_OXM_ANY, | |
764 | OFPUTIL_P_NXM_OXM_ANY, | |
765 | -1, | |
766 | } | |
767 | }; | |
768 | ||
769 | /* Maps an NXM or OXM header value to an mf_field. */ | |
770 | struct nxm_field { | |
771 | struct hmap_node hmap_node; /* In 'all_fields' hmap. */ | |
772 | uint32_t header; /* NXM or OXM header value. */ | |
773 | const struct mf_field *mf; | |
774 | }; | |
775 | ||
776 | /* Contains 'struct nxm_field's. */ | |
777 | static struct hmap all_fields; | |
778 | ||
779 | /* Maps from an mf_field's 'name' or 'extra_name' to the mf_field. */ | |
780 | static struct shash mf_by_name; | |
781 | ||
782 | /* Rate limit for parse errors. These always indicate a bug in an OpenFlow | |
783 | * controller and so there's not much point in showing a lot of them. */ | |
784 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
785 | ||
786 | const struct mf_field *mf_from_nxm_header__(uint32_t header); | |
787 | static void nxm_init(void); | |
788 | ||
789 | /* Returns the field with the given 'name', or a null pointer if no field has | |
790 | * that name. */ | |
791 | const struct mf_field * | |
792 | mf_from_name(const char *name) | |
793 | { | |
794 | nxm_init(); | |
795 | return shash_find_data(&mf_by_name, name); | |
796 | } | |
797 | ||
798 | static void | |
799 | add_nxm_field(uint32_t header, const struct mf_field *mf) | |
800 | { | |
801 | struct nxm_field *f; | |
802 | ||
803 | f = xmalloc(sizeof *f); | |
804 | hmap_insert(&all_fields, &f->hmap_node, hash_int(header, 0)); | |
805 | f->header = header; | |
806 | f->mf = mf; | |
807 | } | |
808 | ||
809 | static void | |
810 | nxm_init_add_field(const struct mf_field *mf, uint32_t header) | |
811 | { | |
812 | if (header) { | |
813 | ovs_assert(!mf_from_nxm_header__(header)); | |
814 | add_nxm_field(header, mf); | |
815 | if (mf->maskable != MFM_NONE) { | |
816 | add_nxm_field(NXM_MAKE_WILD_HEADER(header), mf); | |
817 | } | |
818 | } | |
819 | } | |
820 | ||
821 | static void | |
822 | nxm_do_init(void) | |
823 | { | |
824 | int i; | |
825 | ||
826 | hmap_init(&all_fields); | |
827 | shash_init(&mf_by_name); | |
828 | for (i = 0; i < MFF_N_IDS; i++) { | |
829 | const struct mf_field *mf = &mf_fields[i]; | |
830 | ||
831 | ovs_assert(mf->id == i); /* Fields must be in the enum order. */ | |
832 | ||
833 | nxm_init_add_field(mf, mf->nxm_header); | |
834 | if (mf->oxm_header != mf->nxm_header) { | |
835 | nxm_init_add_field(mf, mf->oxm_header); | |
836 | } | |
837 | ||
838 | shash_add_once(&mf_by_name, mf->name, mf); | |
839 | if (mf->extra_name) { | |
840 | shash_add_once(&mf_by_name, mf->extra_name, mf); | |
841 | } | |
842 | } | |
843 | } | |
844 | ||
845 | static void | |
846 | nxm_init(void) | |
847 | { | |
848 | static pthread_once_t once = PTHREAD_ONCE_INIT; | |
849 | pthread_once(&once, nxm_do_init); | |
850 | } | |
851 | ||
852 | const struct mf_field * | |
853 | mf_from_nxm_header(uint32_t header) | |
854 | { | |
855 | nxm_init(); | |
856 | return mf_from_nxm_header__(header); | |
857 | } | |
858 | ||
859 | const struct mf_field * | |
860 | mf_from_nxm_header__(uint32_t header) | |
861 | { | |
862 | const struct nxm_field *f; | |
863 | ||
864 | HMAP_FOR_EACH_IN_BUCKET (f, hmap_node, hash_int(header, 0), &all_fields) { | |
865 | if (f->header == header) { | |
866 | return f->mf; | |
867 | } | |
868 | } | |
869 | ||
870 | return NULL; | |
871 | } | |
872 | ||
873 | /* Returns true if 'wc' wildcards all the bits in field 'mf', false if 'wc' | |
874 | * specifies at least one bit in the field. | |
875 | * | |
876 | * The caller is responsible for ensuring that 'wc' corresponds to a flow that | |
877 | * meets 'mf''s prerequisites. */ | |
878 | bool | |
879 | mf_is_all_wild(const struct mf_field *mf, const struct flow_wildcards *wc) | |
880 | { | |
881 | switch (mf->id) { | |
882 | case MFF_TUN_SRC: | |
883 | return !wc->masks.tunnel.ip_src; | |
884 | case MFF_TUN_DST: | |
885 | return !wc->masks.tunnel.ip_dst; | |
886 | case MFF_TUN_ID: | |
887 | case MFF_TUN_TOS: | |
888 | case MFF_TUN_TTL: | |
889 | case MFF_TUN_FLAGS: | |
890 | return !wc->masks.tunnel.tun_id; | |
891 | case MFF_METADATA: | |
892 | return !wc->masks.metadata; | |
893 | case MFF_IN_PORT: | |
894 | case MFF_IN_PORT_OXM: | |
895 | return !wc->masks.in_port.ofp_port; | |
896 | case MFF_SKB_PRIORITY: | |
897 | return !wc->masks.skb_priority; | |
898 | case MFF_PKT_MARK: | |
899 | return !wc->masks.pkt_mark; | |
900 | CASE_MFF_REGS: | |
901 | return !wc->masks.regs[mf->id - MFF_REG0]; | |
902 | ||
903 | case MFF_ETH_SRC: | |
904 | return eth_addr_is_zero(wc->masks.dl_src); | |
905 | case MFF_ETH_DST: | |
906 | return eth_addr_is_zero(wc->masks.dl_dst); | |
907 | case MFF_ETH_TYPE: | |
908 | return !wc->masks.dl_type; | |
909 | ||
910 | case MFF_ARP_SHA: | |
911 | case MFF_ND_SLL: | |
912 | return eth_addr_is_zero(wc->masks.arp_sha); | |
913 | ||
914 | case MFF_ARP_THA: | |
915 | case MFF_ND_TLL: | |
916 | return eth_addr_is_zero(wc->masks.arp_tha); | |
917 | ||
918 | case MFF_VLAN_TCI: | |
919 | return !wc->masks.vlan_tci; | |
920 | case MFF_DL_VLAN: | |
921 | return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK)); | |
922 | case MFF_VLAN_VID: | |
923 | return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI)); | |
924 | case MFF_DL_VLAN_PCP: | |
925 | case MFF_VLAN_PCP: | |
926 | return !(wc->masks.vlan_tci & htons(VLAN_PCP_MASK)); | |
927 | ||
928 | case MFF_MPLS_LABEL: | |
929 | return !(wc->masks.mpls_lse & htonl(MPLS_LABEL_MASK)); | |
930 | case MFF_MPLS_TC: | |
931 | return !(wc->masks.mpls_lse & htonl(MPLS_TC_MASK)); | |
932 | case MFF_MPLS_BOS: | |
933 | return !(wc->masks.mpls_lse & htonl(MPLS_BOS_MASK)); | |
934 | ||
935 | case MFF_IPV4_SRC: | |
936 | return !wc->masks.nw_src; | |
937 | case MFF_IPV4_DST: | |
938 | return !wc->masks.nw_dst; | |
939 | ||
940 | case MFF_IPV6_SRC: | |
941 | return ipv6_mask_is_any(&wc->masks.ipv6_src); | |
942 | case MFF_IPV6_DST: | |
943 | return ipv6_mask_is_any(&wc->masks.ipv6_dst); | |
944 | ||
945 | case MFF_IPV6_LABEL: | |
946 | return !wc->masks.ipv6_label; | |
947 | ||
948 | case MFF_IP_PROTO: | |
949 | return !wc->masks.nw_proto; | |
950 | case MFF_IP_DSCP: | |
951 | case MFF_IP_DSCP_SHIFTED: | |
952 | return !(wc->masks.nw_tos & IP_DSCP_MASK); | |
953 | case MFF_IP_ECN: | |
954 | return !(wc->masks.nw_tos & IP_ECN_MASK); | |
955 | case MFF_IP_TTL: | |
956 | return !wc->masks.nw_ttl; | |
957 | ||
958 | case MFF_ND_TARGET: | |
959 | return ipv6_mask_is_any(&wc->masks.nd_target); | |
960 | ||
961 | case MFF_IP_FRAG: | |
962 | return !(wc->masks.nw_frag & FLOW_NW_FRAG_MASK); | |
963 | ||
964 | case MFF_ARP_OP: | |
965 | return !wc->masks.nw_proto; | |
966 | case MFF_ARP_SPA: | |
967 | return !wc->masks.nw_src; | |
968 | case MFF_ARP_TPA: | |
969 | return !wc->masks.nw_dst; | |
970 | ||
971 | case MFF_TCP_SRC: | |
972 | case MFF_UDP_SRC: | |
973 | case MFF_SCTP_SRC: | |
974 | case MFF_ICMPV4_TYPE: | |
975 | case MFF_ICMPV6_TYPE: | |
976 | return !wc->masks.tp_src; | |
977 | case MFF_TCP_DST: | |
978 | case MFF_UDP_DST: | |
979 | case MFF_SCTP_DST: | |
980 | case MFF_ICMPV4_CODE: | |
981 | case MFF_ICMPV6_CODE: | |
982 | return !wc->masks.tp_dst; | |
983 | case MFF_TCP_FLAGS: | |
984 | return !wc->masks.tcp_flags; | |
985 | ||
986 | case MFF_N_IDS: | |
987 | default: | |
988 | NOT_REACHED(); | |
989 | } | |
990 | } | |
991 | ||
992 | /* Initializes 'mask' with the wildcard bit pattern for field 'mf' within 'wc'. | |
993 | * Each bit in 'mask' will be set to 1 if the bit is significant for matching | |
994 | * purposes, or to 0 if it is wildcarded. | |
995 | * | |
996 | * The caller is responsible for ensuring that 'wc' corresponds to a flow that | |
997 | * meets 'mf''s prerequisites. */ | |
998 | void | |
999 | mf_get_mask(const struct mf_field *mf, const struct flow_wildcards *wc, | |
1000 | union mf_value *mask) | |
1001 | { | |
1002 | mf_get_value(mf, &wc->masks, mask); | |
1003 | } | |
1004 | ||
1005 | /* Tests whether 'mask' is a valid wildcard bit pattern for 'mf'. Returns true | |
1006 | * if the mask is valid, false otherwise. */ | |
1007 | bool | |
1008 | mf_is_mask_valid(const struct mf_field *mf, const union mf_value *mask) | |
1009 | { | |
1010 | switch (mf->maskable) { | |
1011 | case MFM_NONE: | |
1012 | return (is_all_zeros((const uint8_t *) mask, mf->n_bytes) || | |
1013 | is_all_ones((const uint8_t *) mask, mf->n_bytes)); | |
1014 | ||
1015 | case MFM_FULLY: | |
1016 | return true; | |
1017 | } | |
1018 | ||
1019 | NOT_REACHED(); | |
1020 | } | |
1021 | ||
1022 | static bool | |
1023 | is_icmpv4(const struct flow *flow) | |
1024 | { | |
1025 | return (flow->dl_type == htons(ETH_TYPE_IP) | |
1026 | && flow->nw_proto == IPPROTO_ICMP); | |
1027 | } | |
1028 | ||
1029 | static bool | |
1030 | is_icmpv6(const struct flow *flow) | |
1031 | { | |
1032 | return (flow->dl_type == htons(ETH_TYPE_IPV6) | |
1033 | && flow->nw_proto == IPPROTO_ICMPV6); | |
1034 | } | |
1035 | ||
1036 | /* Returns true if 'flow' meets the prerequisites for 'mf', false otherwise. */ | |
1037 | bool | |
1038 | mf_are_prereqs_ok(const struct mf_field *mf, const struct flow *flow) | |
1039 | { | |
1040 | switch (mf->prereqs) { | |
1041 | case MFP_NONE: | |
1042 | return true; | |
1043 | ||
1044 | case MFP_ARP: | |
1045 | return (flow->dl_type == htons(ETH_TYPE_ARP) || | |
1046 | flow->dl_type == htons(ETH_TYPE_RARP)); | |
1047 | case MFP_IPV4: | |
1048 | return flow->dl_type == htons(ETH_TYPE_IP); | |
1049 | case MFP_IPV6: | |
1050 | return flow->dl_type == htons(ETH_TYPE_IPV6); | |
1051 | case MFP_VLAN_VID: | |
1052 | return (flow->vlan_tci & htons(VLAN_CFI)) != 0; | |
1053 | case MFP_MPLS: | |
1054 | return eth_type_mpls(flow->dl_type); | |
1055 | case MFP_IP_ANY: | |
1056 | return is_ip_any(flow); | |
1057 | ||
1058 | case MFP_TCP: | |
1059 | return is_ip_any(flow) && flow->nw_proto == IPPROTO_TCP; | |
1060 | case MFP_UDP: | |
1061 | return is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP; | |
1062 | case MFP_SCTP: | |
1063 | return is_ip_any(flow) && flow->nw_proto == IPPROTO_SCTP; | |
1064 | case MFP_ICMPV4: | |
1065 | return is_icmpv4(flow); | |
1066 | case MFP_ICMPV6: | |
1067 | return is_icmpv6(flow); | |
1068 | ||
1069 | case MFP_ND: | |
1070 | return (is_icmpv6(flow) | |
1071 | && flow->tp_dst == htons(0) | |
1072 | && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) || | |
1073 | flow->tp_src == htons(ND_NEIGHBOR_ADVERT))); | |
1074 | case MFP_ND_SOLICIT: | |
1075 | return (is_icmpv6(flow) | |
1076 | && flow->tp_dst == htons(0) | |
1077 | && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT))); | |
1078 | case MFP_ND_ADVERT: | |
1079 | return (is_icmpv6(flow) | |
1080 | && flow->tp_dst == htons(0) | |
1081 | && (flow->tp_src == htons(ND_NEIGHBOR_ADVERT))); | |
1082 | } | |
1083 | ||
1084 | NOT_REACHED(); | |
1085 | } | |
1086 | ||
1087 | /* Set field and it's prerequisities in the mask. | |
1088 | * This is only ever called for writeable 'mf's, but we do not make the | |
1089 | * distinction here. */ | |
1090 | void | |
1091 | mf_mask_field_and_prereqs(const struct mf_field *mf, struct flow *mask) | |
1092 | { | |
1093 | static const union mf_value exact_match_mask = MF_EXACT_MASK_INITIALIZER; | |
1094 | ||
1095 | mf_set_flow_value(mf, &exact_match_mask, mask); | |
1096 | ||
1097 | switch (mf->prereqs) { | |
1098 | case MFP_ND: | |
1099 | case MFP_ND_SOLICIT: | |
1100 | case MFP_ND_ADVERT: | |
1101 | mask->tp_src = OVS_BE16_MAX; | |
1102 | mask->tp_dst = OVS_BE16_MAX; | |
1103 | /* Fall through. */ | |
1104 | case MFP_TCP: | |
1105 | case MFP_UDP: | |
1106 | case MFP_SCTP: | |
1107 | case MFP_ICMPV4: | |
1108 | case MFP_ICMPV6: | |
1109 | mask->nw_proto = 0xff; | |
1110 | /* Fall through. */ | |
1111 | case MFP_ARP: | |
1112 | case MFP_IPV4: | |
1113 | case MFP_IPV6: | |
1114 | case MFP_MPLS: | |
1115 | case MFP_IP_ANY: | |
1116 | mask->dl_type = OVS_BE16_MAX; | |
1117 | break; | |
1118 | case MFP_VLAN_VID: | |
1119 | mask->vlan_tci |= htons(VLAN_CFI); | |
1120 | break; | |
1121 | case MFP_NONE: | |
1122 | break; | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | ||
1127 | /* Returns true if 'value' may be a valid value *as part of a masked match*, | |
1128 | * false otherwise. | |
1129 | * | |
1130 | * A value is not rejected just because it is not valid for the field in | |
1131 | * question, but only if it doesn't make sense to test the bits in question at | |
1132 | * all. For example, the MFF_VLAN_TCI field will never have a nonzero value | |
1133 | * without the VLAN_CFI bit being set, but we can't reject those values because | |
1134 | * it is still legitimate to test just for those bits (see the documentation | |
1135 | * for NXM_OF_VLAN_TCI in nicira-ext.h). On the other hand, there is never a | |
1136 | * reason to set the low bit of MFF_IP_DSCP to 1, so we reject that. */ | |
1137 | bool | |
1138 | mf_is_value_valid(const struct mf_field *mf, const union mf_value *value) | |
1139 | { | |
1140 | switch (mf->id) { | |
1141 | case MFF_TUN_ID: | |
1142 | case MFF_TUN_SRC: | |
1143 | case MFF_TUN_DST: | |
1144 | case MFF_TUN_TOS: | |
1145 | case MFF_TUN_TTL: | |
1146 | case MFF_TUN_FLAGS: | |
1147 | case MFF_METADATA: | |
1148 | case MFF_IN_PORT: | |
1149 | case MFF_SKB_PRIORITY: | |
1150 | case MFF_PKT_MARK: | |
1151 | CASE_MFF_REGS: | |
1152 | case MFF_ETH_SRC: | |
1153 | case MFF_ETH_DST: | |
1154 | case MFF_ETH_TYPE: | |
1155 | case MFF_VLAN_TCI: | |
1156 | case MFF_IPV4_SRC: | |
1157 | case MFF_IPV4_DST: | |
1158 | case MFF_IPV6_SRC: | |
1159 | case MFF_IPV6_DST: | |
1160 | case MFF_IP_PROTO: | |
1161 | case MFF_IP_TTL: | |
1162 | case MFF_ARP_SPA: | |
1163 | case MFF_ARP_TPA: | |
1164 | case MFF_ARP_SHA: | |
1165 | case MFF_ARP_THA: | |
1166 | case MFF_TCP_SRC: | |
1167 | case MFF_TCP_DST: | |
1168 | case MFF_UDP_SRC: | |
1169 | case MFF_UDP_DST: | |
1170 | case MFF_SCTP_SRC: | |
1171 | case MFF_SCTP_DST: | |
1172 | case MFF_ICMPV4_TYPE: | |
1173 | case MFF_ICMPV4_CODE: | |
1174 | case MFF_ICMPV6_TYPE: | |
1175 | case MFF_ICMPV6_CODE: | |
1176 | case MFF_ND_TARGET: | |
1177 | case MFF_ND_SLL: | |
1178 | case MFF_ND_TLL: | |
1179 | return true; | |
1180 | ||
1181 | case MFF_IN_PORT_OXM: { | |
1182 | ofp_port_t port; | |
1183 | return !ofputil_port_from_ofp11(value->be32, &port); | |
1184 | } | |
1185 | ||
1186 | case MFF_IP_DSCP: | |
1187 | return !(value->u8 & ~IP_DSCP_MASK); | |
1188 | case MFF_IP_DSCP_SHIFTED: | |
1189 | return !(value->u8 & (~IP_DSCP_MASK >> 2)); | |
1190 | case MFF_IP_ECN: | |
1191 | return !(value->u8 & ~IP_ECN_MASK); | |
1192 | case MFF_IP_FRAG: | |
1193 | return !(value->u8 & ~FLOW_NW_FRAG_MASK); | |
1194 | case MFF_TCP_FLAGS: | |
1195 | return !(value->be16 & ~htons(0x0fff)); | |
1196 | ||
1197 | case MFF_ARP_OP: | |
1198 | return !(value->be16 & htons(0xff00)); | |
1199 | ||
1200 | case MFF_DL_VLAN: | |
1201 | return !(value->be16 & htons(VLAN_CFI | VLAN_PCP_MASK)); | |
1202 | case MFF_VLAN_VID: | |
1203 | return !(value->be16 & htons(VLAN_PCP_MASK)); | |
1204 | ||
1205 | case MFF_DL_VLAN_PCP: | |
1206 | case MFF_VLAN_PCP: | |
1207 | return !(value->u8 & ~(VLAN_PCP_MASK >> VLAN_PCP_SHIFT)); | |
1208 | ||
1209 | case MFF_IPV6_LABEL: | |
1210 | return !(value->be32 & ~htonl(IPV6_LABEL_MASK)); | |
1211 | ||
1212 | case MFF_MPLS_LABEL: | |
1213 | return !(value->be32 & ~htonl(MPLS_LABEL_MASK >> MPLS_LABEL_SHIFT)); | |
1214 | ||
1215 | case MFF_MPLS_TC: | |
1216 | return !(value->u8 & ~(MPLS_TC_MASK >> MPLS_TC_SHIFT)); | |
1217 | ||
1218 | case MFF_MPLS_BOS: | |
1219 | return !(value->u8 & ~(MPLS_BOS_MASK >> MPLS_BOS_SHIFT)); | |
1220 | ||
1221 | case MFF_N_IDS: | |
1222 | default: | |
1223 | NOT_REACHED(); | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | /* Copies the value of field 'mf' from 'flow' into 'value'. The caller is | |
1228 | * responsible for ensuring that 'flow' meets 'mf''s prerequisites. */ | |
1229 | void | |
1230 | mf_get_value(const struct mf_field *mf, const struct flow *flow, | |
1231 | union mf_value *value) | |
1232 | { | |
1233 | switch (mf->id) { | |
1234 | case MFF_TUN_ID: | |
1235 | value->be64 = flow->tunnel.tun_id; | |
1236 | break; | |
1237 | case MFF_TUN_SRC: | |
1238 | value->be32 = flow->tunnel.ip_src; | |
1239 | break; | |
1240 | case MFF_TUN_DST: | |
1241 | value->be32 = flow->tunnel.ip_dst; | |
1242 | break; | |
1243 | case MFF_TUN_FLAGS: | |
1244 | value->be16 = htons(flow->tunnel.flags); | |
1245 | break; | |
1246 | case MFF_TUN_TTL: | |
1247 | value->u8 = flow->tunnel.ip_ttl; | |
1248 | break; | |
1249 | case MFF_TUN_TOS: | |
1250 | value->u8 = flow->tunnel.ip_tos; | |
1251 | break; | |
1252 | ||
1253 | case MFF_METADATA: | |
1254 | value->be64 = flow->metadata; | |
1255 | break; | |
1256 | ||
1257 | case MFF_IN_PORT: | |
1258 | value->be16 = htons(ofp_to_u16(flow->in_port.ofp_port)); | |
1259 | break; | |
1260 | case MFF_IN_PORT_OXM: | |
1261 | value->be32 = ofputil_port_to_ofp11(flow->in_port.ofp_port); | |
1262 | break; | |
1263 | ||
1264 | case MFF_SKB_PRIORITY: | |
1265 | value->be32 = htonl(flow->skb_priority); | |
1266 | break; | |
1267 | ||
1268 | case MFF_PKT_MARK: | |
1269 | value->be32 = htonl(flow->pkt_mark); | |
1270 | break; | |
1271 | ||
1272 | CASE_MFF_REGS: | |
1273 | value->be32 = htonl(flow->regs[mf->id - MFF_REG0]); | |
1274 | break; | |
1275 | ||
1276 | case MFF_ETH_SRC: | |
1277 | memcpy(value->mac, flow->dl_src, ETH_ADDR_LEN); | |
1278 | break; | |
1279 | ||
1280 | case MFF_ETH_DST: | |
1281 | memcpy(value->mac, flow->dl_dst, ETH_ADDR_LEN); | |
1282 | break; | |
1283 | ||
1284 | case MFF_ETH_TYPE: | |
1285 | value->be16 = flow->dl_type; | |
1286 | break; | |
1287 | ||
1288 | case MFF_VLAN_TCI: | |
1289 | value->be16 = flow->vlan_tci; | |
1290 | break; | |
1291 | ||
1292 | case MFF_DL_VLAN: | |
1293 | value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK); | |
1294 | break; | |
1295 | case MFF_VLAN_VID: | |
1296 | value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI); | |
1297 | break; | |
1298 | ||
1299 | case MFF_DL_VLAN_PCP: | |
1300 | case MFF_VLAN_PCP: | |
1301 | value->u8 = vlan_tci_to_pcp(flow->vlan_tci); | |
1302 | break; | |
1303 | ||
1304 | case MFF_MPLS_LABEL: | |
1305 | value->be32 = htonl(mpls_lse_to_label(flow->mpls_lse)); | |
1306 | break; | |
1307 | ||
1308 | case MFF_MPLS_TC: | |
1309 | value->u8 = mpls_lse_to_tc(flow->mpls_lse); | |
1310 | break; | |
1311 | ||
1312 | case MFF_MPLS_BOS: | |
1313 | value->u8 = mpls_lse_to_bos(flow->mpls_lse); | |
1314 | break; | |
1315 | ||
1316 | case MFF_IPV4_SRC: | |
1317 | value->be32 = flow->nw_src; | |
1318 | break; | |
1319 | ||
1320 | case MFF_IPV4_DST: | |
1321 | value->be32 = flow->nw_dst; | |
1322 | break; | |
1323 | ||
1324 | case MFF_IPV6_SRC: | |
1325 | value->ipv6 = flow->ipv6_src; | |
1326 | break; | |
1327 | ||
1328 | case MFF_IPV6_DST: | |
1329 | value->ipv6 = flow->ipv6_dst; | |
1330 | break; | |
1331 | ||
1332 | case MFF_IPV6_LABEL: | |
1333 | value->be32 = flow->ipv6_label; | |
1334 | break; | |
1335 | ||
1336 | case MFF_IP_PROTO: | |
1337 | value->u8 = flow->nw_proto; | |
1338 | break; | |
1339 | ||
1340 | case MFF_IP_DSCP: | |
1341 | value->u8 = flow->nw_tos & IP_DSCP_MASK; | |
1342 | break; | |
1343 | ||
1344 | case MFF_IP_DSCP_SHIFTED: | |
1345 | value->u8 = flow->nw_tos >> 2; | |
1346 | break; | |
1347 | ||
1348 | case MFF_IP_ECN: | |
1349 | value->u8 = flow->nw_tos & IP_ECN_MASK; | |
1350 | break; | |
1351 | ||
1352 | case MFF_IP_TTL: | |
1353 | value->u8 = flow->nw_ttl; | |
1354 | break; | |
1355 | ||
1356 | case MFF_IP_FRAG: | |
1357 | value->u8 = flow->nw_frag; | |
1358 | break; | |
1359 | ||
1360 | case MFF_ARP_OP: | |
1361 | value->be16 = htons(flow->nw_proto); | |
1362 | break; | |
1363 | ||
1364 | case MFF_ARP_SPA: | |
1365 | value->be32 = flow->nw_src; | |
1366 | break; | |
1367 | ||
1368 | case MFF_ARP_TPA: | |
1369 | value->be32 = flow->nw_dst; | |
1370 | break; | |
1371 | ||
1372 | case MFF_ARP_SHA: | |
1373 | case MFF_ND_SLL: | |
1374 | memcpy(value->mac, flow->arp_sha, ETH_ADDR_LEN); | |
1375 | break; | |
1376 | ||
1377 | case MFF_ARP_THA: | |
1378 | case MFF_ND_TLL: | |
1379 | memcpy(value->mac, flow->arp_tha, ETH_ADDR_LEN); | |
1380 | break; | |
1381 | ||
1382 | case MFF_TCP_SRC: | |
1383 | case MFF_UDP_SRC: | |
1384 | case MFF_SCTP_SRC: | |
1385 | value->be16 = flow->tp_src; | |
1386 | break; | |
1387 | ||
1388 | case MFF_TCP_DST: | |
1389 | case MFF_UDP_DST: | |
1390 | case MFF_SCTP_DST: | |
1391 | value->be16 = flow->tp_dst; | |
1392 | break; | |
1393 | ||
1394 | case MFF_TCP_FLAGS: | |
1395 | value->be16 = flow->tcp_flags; | |
1396 | break; | |
1397 | ||
1398 | case MFF_ICMPV4_TYPE: | |
1399 | case MFF_ICMPV6_TYPE: | |
1400 | value->u8 = ntohs(flow->tp_src); | |
1401 | break; | |
1402 | ||
1403 | case MFF_ICMPV4_CODE: | |
1404 | case MFF_ICMPV6_CODE: | |
1405 | value->u8 = ntohs(flow->tp_dst); | |
1406 | break; | |
1407 | ||
1408 | case MFF_ND_TARGET: | |
1409 | value->ipv6 = flow->nd_target; | |
1410 | break; | |
1411 | ||
1412 | case MFF_N_IDS: | |
1413 | default: | |
1414 | NOT_REACHED(); | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | /* Makes 'match' match field 'mf' exactly, with the value matched taken from | |
1419 | * 'value'. The caller is responsible for ensuring that 'match' meets 'mf''s | |
1420 | * prerequisites. */ | |
1421 | void | |
1422 | mf_set_value(const struct mf_field *mf, | |
1423 | const union mf_value *value, struct match *match) | |
1424 | { | |
1425 | switch (mf->id) { | |
1426 | case MFF_TUN_ID: | |
1427 | match_set_tun_id(match, value->be64); | |
1428 | break; | |
1429 | case MFF_TUN_SRC: | |
1430 | match_set_tun_src(match, value->be32); | |
1431 | break; | |
1432 | case MFF_TUN_DST: | |
1433 | match_set_tun_dst(match, value->be32); | |
1434 | break; | |
1435 | case MFF_TUN_FLAGS: | |
1436 | match_set_tun_flags(match, ntohs(value->be16)); | |
1437 | break; | |
1438 | case MFF_TUN_TOS: | |
1439 | match_set_tun_tos(match, value->u8); | |
1440 | break; | |
1441 | case MFF_TUN_TTL: | |
1442 | match_set_tun_ttl(match, value->u8); | |
1443 | break; | |
1444 | ||
1445 | case MFF_METADATA: | |
1446 | match_set_metadata(match, value->be64); | |
1447 | break; | |
1448 | ||
1449 | case MFF_IN_PORT: | |
1450 | match_set_in_port(match, u16_to_ofp(ntohs(value->be16))); | |
1451 | break; | |
1452 | ||
1453 | case MFF_IN_PORT_OXM: { | |
1454 | ofp_port_t port; | |
1455 | ofputil_port_from_ofp11(value->be32, &port); | |
1456 | match_set_in_port(match, port); | |
1457 | break; | |
1458 | } | |
1459 | ||
1460 | case MFF_SKB_PRIORITY: | |
1461 | match_set_skb_priority(match, ntohl(value->be32)); | |
1462 | break; | |
1463 | ||
1464 | case MFF_PKT_MARK: | |
1465 | match_set_pkt_mark(match, ntohl(value->be32)); | |
1466 | break; | |
1467 | ||
1468 | CASE_MFF_REGS: | |
1469 | match_set_reg(match, mf->id - MFF_REG0, ntohl(value->be32)); | |
1470 | break; | |
1471 | ||
1472 | case MFF_ETH_SRC: | |
1473 | match_set_dl_src(match, value->mac); | |
1474 | break; | |
1475 | ||
1476 | case MFF_ETH_DST: | |
1477 | match_set_dl_dst(match, value->mac); | |
1478 | break; | |
1479 | ||
1480 | case MFF_ETH_TYPE: | |
1481 | match_set_dl_type(match, value->be16); | |
1482 | break; | |
1483 | ||
1484 | case MFF_VLAN_TCI: | |
1485 | match_set_dl_tci(match, value->be16); | |
1486 | break; | |
1487 | ||
1488 | case MFF_DL_VLAN: | |
1489 | match_set_dl_vlan(match, value->be16); | |
1490 | break; | |
1491 | case MFF_VLAN_VID: | |
1492 | match_set_vlan_vid(match, value->be16); | |
1493 | break; | |
1494 | ||
1495 | case MFF_DL_VLAN_PCP: | |
1496 | case MFF_VLAN_PCP: | |
1497 | match_set_dl_vlan_pcp(match, value->u8); | |
1498 | break; | |
1499 | ||
1500 | case MFF_MPLS_LABEL: | |
1501 | match_set_mpls_label(match, value->be32); | |
1502 | break; | |
1503 | ||
1504 | case MFF_MPLS_TC: | |
1505 | match_set_mpls_tc(match, value->u8); | |
1506 | break; | |
1507 | ||
1508 | case MFF_MPLS_BOS: | |
1509 | match_set_mpls_bos(match, value->u8); | |
1510 | break; | |
1511 | ||
1512 | case MFF_IPV4_SRC: | |
1513 | match_set_nw_src(match, value->be32); | |
1514 | break; | |
1515 | ||
1516 | case MFF_IPV4_DST: | |
1517 | match_set_nw_dst(match, value->be32); | |
1518 | break; | |
1519 | ||
1520 | case MFF_IPV6_SRC: | |
1521 | match_set_ipv6_src(match, &value->ipv6); | |
1522 | break; | |
1523 | ||
1524 | case MFF_IPV6_DST: | |
1525 | match_set_ipv6_dst(match, &value->ipv6); | |
1526 | break; | |
1527 | ||
1528 | case MFF_IPV6_LABEL: | |
1529 | match_set_ipv6_label(match, value->be32); | |
1530 | break; | |
1531 | ||
1532 | case MFF_IP_PROTO: | |
1533 | match_set_nw_proto(match, value->u8); | |
1534 | break; | |
1535 | ||
1536 | case MFF_IP_DSCP: | |
1537 | match_set_nw_dscp(match, value->u8); | |
1538 | break; | |
1539 | ||
1540 | case MFF_IP_DSCP_SHIFTED: | |
1541 | match_set_nw_dscp(match, value->u8 << 2); | |
1542 | break; | |
1543 | ||
1544 | case MFF_IP_ECN: | |
1545 | match_set_nw_ecn(match, value->u8); | |
1546 | break; | |
1547 | ||
1548 | case MFF_IP_TTL: | |
1549 | match_set_nw_ttl(match, value->u8); | |
1550 | break; | |
1551 | ||
1552 | case MFF_IP_FRAG: | |
1553 | match_set_nw_frag(match, value->u8); | |
1554 | break; | |
1555 | ||
1556 | case MFF_ARP_OP: | |
1557 | match_set_nw_proto(match, ntohs(value->be16)); | |
1558 | break; | |
1559 | ||
1560 | case MFF_ARP_SPA: | |
1561 | match_set_nw_src(match, value->be32); | |
1562 | break; | |
1563 | ||
1564 | case MFF_ARP_TPA: | |
1565 | match_set_nw_dst(match, value->be32); | |
1566 | break; | |
1567 | ||
1568 | case MFF_ARP_SHA: | |
1569 | case MFF_ND_SLL: | |
1570 | match_set_arp_sha(match, value->mac); | |
1571 | break; | |
1572 | ||
1573 | case MFF_ARP_THA: | |
1574 | case MFF_ND_TLL: | |
1575 | match_set_arp_tha(match, value->mac); | |
1576 | break; | |
1577 | ||
1578 | case MFF_TCP_SRC: | |
1579 | case MFF_UDP_SRC: | |
1580 | case MFF_SCTP_SRC: | |
1581 | match_set_tp_src(match, value->be16); | |
1582 | break; | |
1583 | ||
1584 | case MFF_TCP_DST: | |
1585 | case MFF_UDP_DST: | |
1586 | case MFF_SCTP_DST: | |
1587 | match_set_tp_dst(match, value->be16); | |
1588 | break; | |
1589 | ||
1590 | case MFF_TCP_FLAGS: | |
1591 | match_set_tcp_flags(match, value->be16); | |
1592 | break; | |
1593 | ||
1594 | case MFF_ICMPV4_TYPE: | |
1595 | case MFF_ICMPV6_TYPE: | |
1596 | match_set_icmp_type(match, value->u8); | |
1597 | break; | |
1598 | ||
1599 | case MFF_ICMPV4_CODE: | |
1600 | case MFF_ICMPV6_CODE: | |
1601 | match_set_icmp_code(match, value->u8); | |
1602 | break; | |
1603 | ||
1604 | case MFF_ND_TARGET: | |
1605 | match_set_nd_target(match, &value->ipv6); | |
1606 | break; | |
1607 | ||
1608 | case MFF_N_IDS: | |
1609 | default: | |
1610 | NOT_REACHED(); | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | /* Unwildcard 'mask' member field described by 'mf'. The caller is | |
1615 | * responsible for ensuring that 'mask' meets 'mf''s prerequisites. */ | |
1616 | void | |
1617 | mf_mask_field(const struct mf_field *mf, struct flow *mask) | |
1618 | { | |
1619 | static const union mf_value exact_match_mask = MF_EXACT_MASK_INITIALIZER; | |
1620 | ||
1621 | /* For MFF_DL_VLAN, we cannot send a all 1's to flow_set_dl_vlan() | |
1622 | * as that will be considered as OFP10_VLAN_NONE. So consider it as a | |
1623 | * special case. For the rest, calling mf_set_flow_value() is good | |
1624 | * enough. */ | |
1625 | if (mf->id == MFF_DL_VLAN) { | |
1626 | flow_set_dl_vlan(mask, htons(VLAN_VID_MASK)); | |
1627 | } else { | |
1628 | mf_set_flow_value(mf, &exact_match_mask, mask); | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | /* Sets 'flow' member field described by 'mf' to 'value'. The caller is | |
1633 | * responsible for ensuring that 'flow' meets 'mf''s prerequisites.*/ | |
1634 | void | |
1635 | mf_set_flow_value(const struct mf_field *mf, | |
1636 | const union mf_value *value, struct flow *flow) | |
1637 | { | |
1638 | switch (mf->id) { | |
1639 | case MFF_TUN_ID: | |
1640 | flow->tunnel.tun_id = value->be64; | |
1641 | break; | |
1642 | case MFF_TUN_SRC: | |
1643 | flow->tunnel.ip_src = value->be32; | |
1644 | break; | |
1645 | case MFF_TUN_DST: | |
1646 | flow->tunnel.ip_dst = value->be32; | |
1647 | break; | |
1648 | case MFF_TUN_FLAGS: | |
1649 | flow->tunnel.flags = ntohs(value->be16); | |
1650 | break; | |
1651 | case MFF_TUN_TOS: | |
1652 | flow->tunnel.ip_tos = value->u8; | |
1653 | break; | |
1654 | case MFF_TUN_TTL: | |
1655 | flow->tunnel.ip_ttl = value->u8; | |
1656 | break; | |
1657 | ||
1658 | case MFF_METADATA: | |
1659 | flow->metadata = value->be64; | |
1660 | break; | |
1661 | ||
1662 | case MFF_IN_PORT: | |
1663 | flow->in_port.ofp_port = u16_to_ofp(ntohs(value->be16)); | |
1664 | break; | |
1665 | ||
1666 | case MFF_IN_PORT_OXM: { | |
1667 | ofp_port_t port; | |
1668 | ofputil_port_from_ofp11(value->be32, &port); | |
1669 | flow->in_port.ofp_port = port; | |
1670 | break; | |
1671 | } | |
1672 | ||
1673 | case MFF_SKB_PRIORITY: | |
1674 | flow->skb_priority = ntohl(value->be32); | |
1675 | break; | |
1676 | ||
1677 | case MFF_PKT_MARK: | |
1678 | flow->pkt_mark = ntohl(value->be32); | |
1679 | break; | |
1680 | ||
1681 | CASE_MFF_REGS: | |
1682 | flow->regs[mf->id - MFF_REG0] = ntohl(value->be32); | |
1683 | break; | |
1684 | ||
1685 | case MFF_ETH_SRC: | |
1686 | memcpy(flow->dl_src, value->mac, ETH_ADDR_LEN); | |
1687 | break; | |
1688 | ||
1689 | case MFF_ETH_DST: | |
1690 | memcpy(flow->dl_dst, value->mac, ETH_ADDR_LEN); | |
1691 | break; | |
1692 | ||
1693 | case MFF_ETH_TYPE: | |
1694 | flow->dl_type = value->be16; | |
1695 | break; | |
1696 | ||
1697 | case MFF_VLAN_TCI: | |
1698 | flow->vlan_tci = value->be16; | |
1699 | break; | |
1700 | ||
1701 | case MFF_DL_VLAN: | |
1702 | flow_set_dl_vlan(flow, value->be16); | |
1703 | break; | |
1704 | case MFF_VLAN_VID: | |
1705 | flow_set_vlan_vid(flow, value->be16); | |
1706 | break; | |
1707 | ||
1708 | case MFF_DL_VLAN_PCP: | |
1709 | case MFF_VLAN_PCP: | |
1710 | flow_set_vlan_pcp(flow, value->u8); | |
1711 | break; | |
1712 | ||
1713 | case MFF_MPLS_LABEL: | |
1714 | flow_set_mpls_label(flow, value->be32); | |
1715 | break; | |
1716 | ||
1717 | case MFF_MPLS_TC: | |
1718 | flow_set_mpls_tc(flow, value->u8); | |
1719 | break; | |
1720 | ||
1721 | case MFF_MPLS_BOS: | |
1722 | flow_set_mpls_bos(flow, value->u8); | |
1723 | break; | |
1724 | ||
1725 | case MFF_IPV4_SRC: | |
1726 | flow->nw_src = value->be32; | |
1727 | break; | |
1728 | ||
1729 | case MFF_IPV4_DST: | |
1730 | flow->nw_dst = value->be32; | |
1731 | break; | |
1732 | ||
1733 | case MFF_IPV6_SRC: | |
1734 | flow->ipv6_src = value->ipv6; | |
1735 | break; | |
1736 | ||
1737 | case MFF_IPV6_DST: | |
1738 | flow->ipv6_dst = value->ipv6; | |
1739 | break; | |
1740 | ||
1741 | case MFF_IPV6_LABEL: | |
1742 | flow->ipv6_label = value->be32 & ~htonl(IPV6_LABEL_MASK); | |
1743 | break; | |
1744 | ||
1745 | case MFF_IP_PROTO: | |
1746 | flow->nw_proto = value->u8; | |
1747 | break; | |
1748 | ||
1749 | case MFF_IP_DSCP: | |
1750 | flow->nw_tos &= ~IP_DSCP_MASK; | |
1751 | flow->nw_tos |= value->u8 & IP_DSCP_MASK; | |
1752 | break; | |
1753 | ||
1754 | case MFF_IP_DSCP_SHIFTED: | |
1755 | flow->nw_tos &= ~IP_DSCP_MASK; | |
1756 | flow->nw_tos |= value->u8 << 2; | |
1757 | break; | |
1758 | ||
1759 | case MFF_IP_ECN: | |
1760 | flow->nw_tos &= ~IP_ECN_MASK; | |
1761 | flow->nw_tos |= value->u8 & IP_ECN_MASK; | |
1762 | break; | |
1763 | ||
1764 | case MFF_IP_TTL: | |
1765 | flow->nw_ttl = value->u8; | |
1766 | break; | |
1767 | ||
1768 | case MFF_IP_FRAG: | |
1769 | flow->nw_frag &= value->u8; | |
1770 | break; | |
1771 | ||
1772 | case MFF_ARP_OP: | |
1773 | flow->nw_proto = ntohs(value->be16); | |
1774 | break; | |
1775 | ||
1776 | case MFF_ARP_SPA: | |
1777 | flow->nw_src = value->be32; | |
1778 | break; | |
1779 | ||
1780 | case MFF_ARP_TPA: | |
1781 | flow->nw_dst = value->be32; | |
1782 | break; | |
1783 | ||
1784 | case MFF_ARP_SHA: | |
1785 | case MFF_ND_SLL: | |
1786 | memcpy(flow->arp_sha, value->mac, ETH_ADDR_LEN); | |
1787 | break; | |
1788 | ||
1789 | case MFF_ARP_THA: | |
1790 | case MFF_ND_TLL: | |
1791 | memcpy(flow->arp_tha, value->mac, ETH_ADDR_LEN); | |
1792 | break; | |
1793 | ||
1794 | case MFF_TCP_SRC: | |
1795 | case MFF_UDP_SRC: | |
1796 | case MFF_SCTP_SRC: | |
1797 | flow->tp_src = value->be16; | |
1798 | break; | |
1799 | ||
1800 | case MFF_TCP_DST: | |
1801 | case MFF_UDP_DST: | |
1802 | case MFF_SCTP_DST: | |
1803 | flow->tp_dst = value->be16; | |
1804 | break; | |
1805 | ||
1806 | case MFF_TCP_FLAGS: | |
1807 | flow->tcp_flags = value->be16; | |
1808 | break; | |
1809 | ||
1810 | case MFF_ICMPV4_TYPE: | |
1811 | case MFF_ICMPV6_TYPE: | |
1812 | flow->tp_src = htons(value->u8); | |
1813 | break; | |
1814 | ||
1815 | case MFF_ICMPV4_CODE: | |
1816 | case MFF_ICMPV6_CODE: | |
1817 | flow->tp_dst = htons(value->u8); | |
1818 | break; | |
1819 | ||
1820 | case MFF_ND_TARGET: | |
1821 | flow->nd_target = value->ipv6; | |
1822 | break; | |
1823 | ||
1824 | case MFF_N_IDS: | |
1825 | default: | |
1826 | NOT_REACHED(); | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | /* Returns true if 'mf' has a zero value in 'flow', false if it is nonzero. | |
1831 | * | |
1832 | * The caller is responsible for ensuring that 'flow' meets 'mf''s | |
1833 | * prerequisites. */ | |
1834 | bool | |
1835 | mf_is_zero(const struct mf_field *mf, const struct flow *flow) | |
1836 | { | |
1837 | union mf_value value; | |
1838 | ||
1839 | mf_get_value(mf, flow, &value); | |
1840 | return is_all_zeros((const uint8_t *) &value, mf->n_bytes); | |
1841 | } | |
1842 | ||
1843 | /* Makes 'match' wildcard field 'mf'. | |
1844 | * | |
1845 | * The caller is responsible for ensuring that 'match' meets 'mf''s | |
1846 | * prerequisites. */ | |
1847 | void | |
1848 | mf_set_wild(const struct mf_field *mf, struct match *match) | |
1849 | { | |
1850 | switch (mf->id) { | |
1851 | case MFF_TUN_ID: | |
1852 | match_set_tun_id_masked(match, htonll(0), htonll(0)); | |
1853 | break; | |
1854 | case MFF_TUN_SRC: | |
1855 | match_set_tun_src_masked(match, htonl(0), htonl(0)); | |
1856 | break; | |
1857 | case MFF_TUN_DST: | |
1858 | match_set_tun_dst_masked(match, htonl(0), htonl(0)); | |
1859 | break; | |
1860 | case MFF_TUN_FLAGS: | |
1861 | match_set_tun_flags_masked(match, 0, 0); | |
1862 | break; | |
1863 | case MFF_TUN_TOS: | |
1864 | match_set_tun_tos_masked(match, 0, 0); | |
1865 | break; | |
1866 | case MFF_TUN_TTL: | |
1867 | match_set_tun_ttl_masked(match, 0, 0); | |
1868 | break; | |
1869 | ||
1870 | case MFF_METADATA: | |
1871 | match_set_metadata_masked(match, htonll(0), htonll(0)); | |
1872 | break; | |
1873 | ||
1874 | case MFF_IN_PORT: | |
1875 | case MFF_IN_PORT_OXM: | |
1876 | match->flow.in_port.ofp_port = 0; | |
1877 | match->wc.masks.in_port.ofp_port = 0; | |
1878 | break; | |
1879 | ||
1880 | case MFF_SKB_PRIORITY: | |
1881 | match->flow.skb_priority = 0; | |
1882 | match->wc.masks.skb_priority = 0; | |
1883 | break; | |
1884 | ||
1885 | case MFF_PKT_MARK: | |
1886 | match->flow.pkt_mark = 0; | |
1887 | match->wc.masks.pkt_mark = 0; | |
1888 | break; | |
1889 | ||
1890 | CASE_MFF_REGS: | |
1891 | match_set_reg_masked(match, mf->id - MFF_REG0, 0, 0); | |
1892 | break; | |
1893 | ||
1894 | case MFF_ETH_SRC: | |
1895 | memset(match->flow.dl_src, 0, ETH_ADDR_LEN); | |
1896 | memset(match->wc.masks.dl_src, 0, ETH_ADDR_LEN); | |
1897 | break; | |
1898 | ||
1899 | case MFF_ETH_DST: | |
1900 | memset(match->flow.dl_dst, 0, ETH_ADDR_LEN); | |
1901 | memset(match->wc.masks.dl_dst, 0, ETH_ADDR_LEN); | |
1902 | break; | |
1903 | ||
1904 | case MFF_ETH_TYPE: | |
1905 | match->flow.dl_type = htons(0); | |
1906 | match->wc.masks.dl_type = htons(0); | |
1907 | break; | |
1908 | ||
1909 | case MFF_VLAN_TCI: | |
1910 | match_set_dl_tci_masked(match, htons(0), htons(0)); | |
1911 | break; | |
1912 | ||
1913 | case MFF_DL_VLAN: | |
1914 | case MFF_VLAN_VID: | |
1915 | match_set_any_vid(match); | |
1916 | break; | |
1917 | ||
1918 | case MFF_DL_VLAN_PCP: | |
1919 | case MFF_VLAN_PCP: | |
1920 | match_set_any_pcp(match); | |
1921 | break; | |
1922 | ||
1923 | case MFF_MPLS_LABEL: | |
1924 | match_set_any_mpls_label(match); | |
1925 | break; | |
1926 | ||
1927 | case MFF_MPLS_TC: | |
1928 | match_set_any_mpls_tc(match); | |
1929 | break; | |
1930 | ||
1931 | case MFF_MPLS_BOS: | |
1932 | match_set_any_mpls_bos(match); | |
1933 | break; | |
1934 | ||
1935 | case MFF_IPV4_SRC: | |
1936 | case MFF_ARP_SPA: | |
1937 | match_set_nw_src_masked(match, htonl(0), htonl(0)); | |
1938 | break; | |
1939 | ||
1940 | case MFF_IPV4_DST: | |
1941 | case MFF_ARP_TPA: | |
1942 | match_set_nw_dst_masked(match, htonl(0), htonl(0)); | |
1943 | break; | |
1944 | ||
1945 | case MFF_IPV6_SRC: | |
1946 | memset(&match->wc.masks.ipv6_src, 0, sizeof match->wc.masks.ipv6_src); | |
1947 | memset(&match->flow.ipv6_src, 0, sizeof match->flow.ipv6_src); | |
1948 | break; | |
1949 | ||
1950 | case MFF_IPV6_DST: | |
1951 | memset(&match->wc.masks.ipv6_dst, 0, sizeof match->wc.masks.ipv6_dst); | |
1952 | memset(&match->flow.ipv6_dst, 0, sizeof match->flow.ipv6_dst); | |
1953 | break; | |
1954 | ||
1955 | case MFF_IPV6_LABEL: | |
1956 | match->wc.masks.ipv6_label = htonl(0); | |
1957 | match->flow.ipv6_label = htonl(0); | |
1958 | break; | |
1959 | ||
1960 | case MFF_IP_PROTO: | |
1961 | match->wc.masks.nw_proto = 0; | |
1962 | match->flow.nw_proto = 0; | |
1963 | break; | |
1964 | ||
1965 | case MFF_IP_DSCP: | |
1966 | case MFF_IP_DSCP_SHIFTED: | |
1967 | match->wc.masks.nw_tos &= ~IP_DSCP_MASK; | |
1968 | match->flow.nw_tos &= ~IP_DSCP_MASK; | |
1969 | break; | |
1970 | ||
1971 | case MFF_IP_ECN: | |
1972 | match->wc.masks.nw_tos &= ~IP_ECN_MASK; | |
1973 | match->flow.nw_tos &= ~IP_ECN_MASK; | |
1974 | break; | |
1975 | ||
1976 | case MFF_IP_TTL: | |
1977 | match->wc.masks.nw_ttl = 0; | |
1978 | match->flow.nw_ttl = 0; | |
1979 | break; | |
1980 | ||
1981 | case MFF_IP_FRAG: | |
1982 | match->wc.masks.nw_frag |= FLOW_NW_FRAG_MASK; | |
1983 | match->flow.nw_frag &= ~FLOW_NW_FRAG_MASK; | |
1984 | break; | |
1985 | ||
1986 | case MFF_ARP_OP: | |
1987 | match->wc.masks.nw_proto = 0; | |
1988 | match->flow.nw_proto = 0; | |
1989 | break; | |
1990 | ||
1991 | case MFF_ARP_SHA: | |
1992 | case MFF_ND_SLL: | |
1993 | memset(match->flow.arp_sha, 0, ETH_ADDR_LEN); | |
1994 | memset(match->wc.masks.arp_sha, 0, ETH_ADDR_LEN); | |
1995 | break; | |
1996 | ||
1997 | case MFF_ARP_THA: | |
1998 | case MFF_ND_TLL: | |
1999 | memset(match->flow.arp_tha, 0, ETH_ADDR_LEN); | |
2000 | memset(match->wc.masks.arp_tha, 0, ETH_ADDR_LEN); | |
2001 | break; | |
2002 | ||
2003 | case MFF_TCP_SRC: | |
2004 | case MFF_UDP_SRC: | |
2005 | case MFF_SCTP_SRC: | |
2006 | case MFF_ICMPV4_TYPE: | |
2007 | case MFF_ICMPV6_TYPE: | |
2008 | match->wc.masks.tp_src = htons(0); | |
2009 | match->flow.tp_src = htons(0); | |
2010 | break; | |
2011 | ||
2012 | case MFF_TCP_DST: | |
2013 | case MFF_UDP_DST: | |
2014 | case MFF_SCTP_DST: | |
2015 | case MFF_ICMPV4_CODE: | |
2016 | case MFF_ICMPV6_CODE: | |
2017 | match->wc.masks.tp_dst = htons(0); | |
2018 | match->flow.tp_dst = htons(0); | |
2019 | break; | |
2020 | ||
2021 | case MFF_TCP_FLAGS: | |
2022 | match->wc.masks.tcp_flags = htons(0); | |
2023 | match->flow.tcp_flags = htons(0); | |
2024 | break; | |
2025 | ||
2026 | case MFF_ND_TARGET: | |
2027 | memset(&match->wc.masks.nd_target, 0, | |
2028 | sizeof match->wc.masks.nd_target); | |
2029 | memset(&match->flow.nd_target, 0, sizeof match->flow.nd_target); | |
2030 | break; | |
2031 | ||
2032 | case MFF_N_IDS: | |
2033 | default: | |
2034 | NOT_REACHED(); | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | /* Makes 'match' match field 'mf' with the specified 'value' and 'mask'. | |
2039 | * 'value' specifies a value to match and 'mask' specifies a wildcard pattern, | |
2040 | * with a 1-bit indicating that the corresponding value bit must match and a | |
2041 | * 0-bit indicating a don't-care. | |
2042 | * | |
2043 | * If 'mask' is NULL or points to all-1-bits, then this call is equivalent to | |
2044 | * mf_set_value(mf, value, match). If 'mask' points to all-0-bits, then this | |
2045 | * call is equivalent to mf_set_wild(mf, match). | |
2046 | * | |
2047 | * 'mask' must be a valid mask for 'mf' (see mf_is_mask_valid()). The caller | |
2048 | * is responsible for ensuring that 'match' meets 'mf''s prerequisites. */ | |
2049 | enum ofputil_protocol | |
2050 | mf_set(const struct mf_field *mf, | |
2051 | const union mf_value *value, const union mf_value *mask, | |
2052 | struct match *match) | |
2053 | { | |
2054 | if (!mask || is_all_ones((const uint8_t *) mask, mf->n_bytes)) { | |
2055 | mf_set_value(mf, value, match); | |
2056 | return mf->usable_protocols; | |
2057 | } else if (is_all_zeros((const uint8_t *) mask, mf->n_bytes)) { | |
2058 | mf_set_wild(mf, match); | |
2059 | return OFPUTIL_P_ANY; | |
2060 | } | |
2061 | ||
2062 | switch (mf->id) { | |
2063 | case MFF_IN_PORT: | |
2064 | case MFF_IN_PORT_OXM: | |
2065 | case MFF_SKB_PRIORITY: | |
2066 | case MFF_ETH_TYPE: | |
2067 | case MFF_DL_VLAN: | |
2068 | case MFF_DL_VLAN_PCP: | |
2069 | case MFF_VLAN_PCP: | |
2070 | case MFF_MPLS_LABEL: | |
2071 | case MFF_MPLS_TC: | |
2072 | case MFF_MPLS_BOS: | |
2073 | case MFF_IP_PROTO: | |
2074 | case MFF_IP_TTL: | |
2075 | case MFF_IP_DSCP: | |
2076 | case MFF_IP_DSCP_SHIFTED: | |
2077 | case MFF_IP_ECN: | |
2078 | case MFF_ARP_OP: | |
2079 | case MFF_ICMPV4_TYPE: | |
2080 | case MFF_ICMPV4_CODE: | |
2081 | case MFF_ICMPV6_TYPE: | |
2082 | case MFF_ICMPV6_CODE: | |
2083 | return OFPUTIL_P_NONE; | |
2084 | ||
2085 | case MFF_TUN_ID: | |
2086 | match_set_tun_id_masked(match, value->be64, mask->be64); | |
2087 | break; | |
2088 | case MFF_TUN_SRC: | |
2089 | match_set_tun_src_masked(match, value->be32, mask->be32); | |
2090 | break; | |
2091 | case MFF_TUN_DST: | |
2092 | match_set_tun_dst_masked(match, value->be32, mask->be32); | |
2093 | break; | |
2094 | case MFF_TUN_FLAGS: | |
2095 | match_set_tun_flags_masked(match, ntohs(value->be16), ntohs(mask->be16)); | |
2096 | break; | |
2097 | case MFF_TUN_TTL: | |
2098 | match_set_tun_ttl_masked(match, value->u8, mask->u8); | |
2099 | break; | |
2100 | case MFF_TUN_TOS: | |
2101 | match_set_tun_tos_masked(match, value->u8, mask->u8); | |
2102 | break; | |
2103 | ||
2104 | case MFF_METADATA: | |
2105 | match_set_metadata_masked(match, value->be64, mask->be64); | |
2106 | break; | |
2107 | ||
2108 | CASE_MFF_REGS: | |
2109 | match_set_reg_masked(match, mf->id - MFF_REG0, | |
2110 | ntohl(value->be32), ntohl(mask->be32)); | |
2111 | break; | |
2112 | ||
2113 | case MFF_PKT_MARK: | |
2114 | match_set_pkt_mark_masked(match, ntohl(value->be32), | |
2115 | ntohl(mask->be32)); | |
2116 | break; | |
2117 | ||
2118 | case MFF_ETH_DST: | |
2119 | match_set_dl_dst_masked(match, value->mac, mask->mac); | |
2120 | break; | |
2121 | ||
2122 | case MFF_ETH_SRC: | |
2123 | match_set_dl_src_masked(match, value->mac, mask->mac); | |
2124 | break; | |
2125 | ||
2126 | case MFF_ARP_SHA: | |
2127 | case MFF_ND_SLL: | |
2128 | match_set_arp_sha_masked(match, value->mac, mask->mac); | |
2129 | break; | |
2130 | ||
2131 | case MFF_ARP_THA: | |
2132 | case MFF_ND_TLL: | |
2133 | match_set_arp_tha_masked(match, value->mac, mask->mac); | |
2134 | break; | |
2135 | ||
2136 | case MFF_VLAN_TCI: | |
2137 | match_set_dl_tci_masked(match, value->be16, mask->be16); | |
2138 | break; | |
2139 | ||
2140 | case MFF_VLAN_VID: | |
2141 | match_set_vlan_vid_masked(match, value->be16, mask->be16); | |
2142 | break; | |
2143 | ||
2144 | case MFF_IPV4_SRC: | |
2145 | match_set_nw_src_masked(match, value->be32, mask->be32); | |
2146 | goto cidr_check; | |
2147 | ||
2148 | case MFF_IPV4_DST: | |
2149 | match_set_nw_dst_masked(match, value->be32, mask->be32); | |
2150 | goto cidr_check; | |
2151 | ||
2152 | case MFF_IPV6_SRC: | |
2153 | match_set_ipv6_src_masked(match, &value->ipv6, &mask->ipv6); | |
2154 | break; | |
2155 | ||
2156 | case MFF_IPV6_DST: | |
2157 | match_set_ipv6_dst_masked(match, &value->ipv6, &mask->ipv6); | |
2158 | break; | |
2159 | ||
2160 | case MFF_IPV6_LABEL: | |
2161 | if ((mask->be32 & htonl(IPV6_LABEL_MASK)) == htonl(IPV6_LABEL_MASK)) { | |
2162 | mf_set_value(mf, value, match); | |
2163 | } else { | |
2164 | match_set_ipv6_label_masked(match, value->be32, mask->be32); | |
2165 | } | |
2166 | break; | |
2167 | ||
2168 | case MFF_ND_TARGET: | |
2169 | match_set_nd_target_masked(match, &value->ipv6, &mask->ipv6); | |
2170 | break; | |
2171 | ||
2172 | case MFF_IP_FRAG: | |
2173 | match_set_nw_frag_masked(match, value->u8, mask->u8); | |
2174 | break; | |
2175 | ||
2176 | case MFF_ARP_SPA: | |
2177 | match_set_nw_src_masked(match, value->be32, mask->be32); | |
2178 | goto cidr_check; | |
2179 | ||
2180 | case MFF_ARP_TPA: | |
2181 | match_set_nw_dst_masked(match, value->be32, mask->be32); | |
2182 | goto cidr_check; | |
2183 | ||
2184 | case MFF_TCP_SRC: | |
2185 | case MFF_UDP_SRC: | |
2186 | case MFF_SCTP_SRC: | |
2187 | match_set_tp_src_masked(match, value->be16, mask->be16); | |
2188 | break; | |
2189 | ||
2190 | case MFF_TCP_DST: | |
2191 | case MFF_UDP_DST: | |
2192 | case MFF_SCTP_DST: | |
2193 | match_set_tp_dst_masked(match, value->be16, mask->be16); | |
2194 | break; | |
2195 | ||
2196 | case MFF_TCP_FLAGS: | |
2197 | match_set_tcp_flags_masked(match, value->be16, mask->be16); | |
2198 | break; | |
2199 | ||
2200 | case MFF_N_IDS: | |
2201 | default: | |
2202 | NOT_REACHED(); | |
2203 | } | |
2204 | ||
2205 | return mf->usable_protocols_bitwise; | |
2206 | ||
2207 | cidr_check: | |
2208 | return ip_is_cidr(mask->be32) ? mf->usable_protocols : | |
2209 | mf->usable_protocols_bitwise; | |
2210 | } | |
2211 | ||
2212 | static enum ofperr | |
2213 | mf_check__(const struct mf_subfield *sf, const struct flow *flow, | |
2214 | const char *type) | |
2215 | { | |
2216 | if (!sf->field) { | |
2217 | VLOG_WARN_RL(&rl, "unknown %s field", type); | |
2218 | return OFPERR_OFPBAC_BAD_SET_TYPE; | |
2219 | } else if (!sf->n_bits) { | |
2220 | VLOG_WARN_RL(&rl, "zero bit %s field %s", type, sf->field->name); | |
2221 | return OFPERR_OFPBAC_BAD_SET_LEN; | |
2222 | } else if (sf->ofs >= sf->field->n_bits) { | |
2223 | VLOG_WARN_RL(&rl, "bit offset %d exceeds %d-bit width of %s field %s", | |
2224 | sf->ofs, sf->field->n_bits, type, sf->field->name); | |
2225 | return OFPERR_OFPBAC_BAD_SET_LEN; | |
2226 | } else if (sf->ofs + sf->n_bits > sf->field->n_bits) { | |
2227 | VLOG_WARN_RL(&rl, "bit offset %d and width %d exceeds %d-bit width " | |
2228 | "of %s field %s", sf->ofs, sf->n_bits, | |
2229 | sf->field->n_bits, type, sf->field->name); | |
2230 | return OFPERR_OFPBAC_BAD_SET_LEN; | |
2231 | } else if (flow && !mf_are_prereqs_ok(sf->field, flow)) { | |
2232 | VLOG_WARN_RL(&rl, "%s field %s lacks correct prerequisites", | |
2233 | type, sf->field->name); | |
2234 | return OFPERR_OFPBAC_MATCH_INCONSISTENT; | |
2235 | } else { | |
2236 | return 0; | |
2237 | } | |
2238 | } | |
2239 | ||
2240 | /* Checks whether 'sf' is valid for reading a subfield out of 'flow'. Returns | |
2241 | * 0 if so, otherwise an OpenFlow error code (e.g. as returned by | |
2242 | * ofp_mkerr()). */ | |
2243 | enum ofperr | |
2244 | mf_check_src(const struct mf_subfield *sf, const struct flow *flow) | |
2245 | { | |
2246 | return mf_check__(sf, flow, "source"); | |
2247 | } | |
2248 | ||
2249 | /* Checks whether 'sf' is valid for writing a subfield into 'flow'. Returns 0 | |
2250 | * if so, otherwise an OpenFlow error code (e.g. as returned by | |
2251 | * ofp_mkerr()). */ | |
2252 | enum ofperr | |
2253 | mf_check_dst(const struct mf_subfield *sf, const struct flow *flow) | |
2254 | { | |
2255 | int error = mf_check__(sf, flow, "destination"); | |
2256 | if (!error && !sf->field->writable) { | |
2257 | VLOG_WARN_RL(&rl, "destination field %s is not writable", | |
2258 | sf->field->name); | |
2259 | return OFPERR_OFPBAC_BAD_SET_ARGUMENT; | |
2260 | } | |
2261 | return error; | |
2262 | } | |
2263 | ||
2264 | /* Copies the value and wildcard bit pattern for 'mf' from 'match' into the | |
2265 | * 'value' and 'mask', respectively. */ | |
2266 | void | |
2267 | mf_get(const struct mf_field *mf, const struct match *match, | |
2268 | union mf_value *value, union mf_value *mask) | |
2269 | { | |
2270 | mf_get_value(mf, &match->flow, value); | |
2271 | mf_get_mask(mf, &match->wc, mask); | |
2272 | } | |
2273 | ||
2274 | static char * | |
2275 | mf_from_integer_string(const struct mf_field *mf, const char *s, | |
2276 | uint8_t *valuep, uint8_t *maskp) | |
2277 | { | |
2278 | unsigned long long int integer, mask; | |
2279 | char *tail; | |
2280 | int i; | |
2281 | ||
2282 | errno = 0; | |
2283 | integer = strtoull(s, &tail, 0); | |
2284 | if (errno || (*tail != '\0' && *tail != '/')) { | |
2285 | goto syntax_error; | |
2286 | } | |
2287 | ||
2288 | if (*tail == '/') { | |
2289 | mask = strtoull(tail + 1, &tail, 0); | |
2290 | if (errno || *tail != '\0') { | |
2291 | goto syntax_error; | |
2292 | } | |
2293 | } else { | |
2294 | mask = ULLONG_MAX; | |
2295 | } | |
2296 | ||
2297 | for (i = mf->n_bytes - 1; i >= 0; i--) { | |
2298 | valuep[i] = integer; | |
2299 | maskp[i] = mask; | |
2300 | integer >>= 8; | |
2301 | mask >>= 8; | |
2302 | } | |
2303 | if (integer) { | |
2304 | return xasprintf("%s: value too large for %u-byte field %s", | |
2305 | s, mf->n_bytes, mf->name); | |
2306 | } | |
2307 | return NULL; | |
2308 | ||
2309 | syntax_error: | |
2310 | return xasprintf("%s: bad syntax for %s", s, mf->name); | |
2311 | } | |
2312 | ||
2313 | static char * | |
2314 | mf_from_ethernet_string(const struct mf_field *mf, const char *s, | |
2315 | uint8_t mac[ETH_ADDR_LEN], | |
2316 | uint8_t mask[ETH_ADDR_LEN]) | |
2317 | { | |
2318 | int n; | |
2319 | ||
2320 | ovs_assert(mf->n_bytes == ETH_ADDR_LEN); | |
2321 | ||
2322 | n = -1; | |
2323 | if (ovs_scan(s, ETH_ADDR_SCAN_FMT"%n", ETH_ADDR_SCAN_ARGS(mac), &n) | |
2324 | && n == strlen(s)) { | |
2325 | memset(mask, 0xff, ETH_ADDR_LEN); | |
2326 | return NULL; | |
2327 | } | |
2328 | ||
2329 | n = -1; | |
2330 | if (ovs_scan(s, ETH_ADDR_SCAN_FMT"/"ETH_ADDR_SCAN_FMT"%n", | |
2331 | ETH_ADDR_SCAN_ARGS(mac), ETH_ADDR_SCAN_ARGS(mask), &n) | |
2332 | && n == strlen(s)) { | |
2333 | return NULL; | |
2334 | } | |
2335 | ||
2336 | return xasprintf("%s: invalid Ethernet address", s); | |
2337 | } | |
2338 | ||
2339 | static char * | |
2340 | mf_from_ipv4_string(const struct mf_field *mf, const char *s, | |
2341 | ovs_be32 *ip, ovs_be32 *mask) | |
2342 | { | |
2343 | int prefix; | |
2344 | ||
2345 | ovs_assert(mf->n_bytes == sizeof *ip); | |
2346 | ||
2347 | if (ovs_scan(s, IP_SCAN_FMT"/"IP_SCAN_FMT, | |
2348 | IP_SCAN_ARGS(ip), IP_SCAN_ARGS(mask))) { | |
2349 | /* OK. */ | |
2350 | } else if (ovs_scan(s, IP_SCAN_FMT"/%d", IP_SCAN_ARGS(ip), &prefix)) { | |
2351 | if (prefix <= 0 || prefix > 32) { | |
2352 | return xasprintf("%s: network prefix bits not between 1 and " | |
2353 | "32", s); | |
2354 | } else if (prefix == 32) { | |
2355 | *mask = OVS_BE32_MAX; | |
2356 | } else { | |
2357 | *mask = htonl(((1u << prefix) - 1) << (32 - prefix)); | |
2358 | } | |
2359 | } else if (ovs_scan(s, IP_SCAN_FMT, IP_SCAN_ARGS(ip))) { | |
2360 | *mask = OVS_BE32_MAX; | |
2361 | } else { | |
2362 | return xasprintf("%s: invalid IP address", s); | |
2363 | } | |
2364 | return NULL; | |
2365 | } | |
2366 | ||
2367 | static char * | |
2368 | mf_from_ipv6_string(const struct mf_field *mf, const char *s, | |
2369 | struct in6_addr *value, struct in6_addr *mask) | |
2370 | { | |
2371 | char *str = xstrdup(s); | |
2372 | char *save_ptr = NULL; | |
2373 | const char *name, *netmask; | |
2374 | int retval; | |
2375 | ||
2376 | ovs_assert(mf->n_bytes == sizeof *value); | |
2377 | ||
2378 | name = strtok_r(str, "/", &save_ptr); | |
2379 | retval = name ? lookup_ipv6(name, value) : EINVAL; | |
2380 | if (retval) { | |
2381 | char *err; | |
2382 | ||
2383 | err = xasprintf("%s: could not convert to IPv6 address", str); | |
2384 | free(str); | |
2385 | ||
2386 | return err; | |
2387 | } | |
2388 | ||
2389 | netmask = strtok_r(NULL, "/", &save_ptr); | |
2390 | if (netmask) { | |
2391 | if (inet_pton(AF_INET6, netmask, mask) != 1) { | |
2392 | int prefix = atoi(netmask); | |
2393 | if (prefix <= 0 || prefix > 128) { | |
2394 | free(str); | |
2395 | return xasprintf("%s: prefix bits not between 1 and 128", s); | |
2396 | } else { | |
2397 | *mask = ipv6_create_mask(prefix); | |
2398 | } | |
2399 | } | |
2400 | } else { | |
2401 | *mask = in6addr_exact; | |
2402 | } | |
2403 | free(str); | |
2404 | ||
2405 | return NULL; | |
2406 | } | |
2407 | ||
2408 | static char * | |
2409 | mf_from_ofp_port_string(const struct mf_field *mf, const char *s, | |
2410 | ovs_be16 *valuep, ovs_be16 *maskp) | |
2411 | { | |
2412 | ofp_port_t port; | |
2413 | ||
2414 | ovs_assert(mf->n_bytes == sizeof(ovs_be16)); | |
2415 | ||
2416 | if (ofputil_port_from_string(s, &port)) { | |
2417 | *valuep = htons(ofp_to_u16(port)); | |
2418 | *maskp = OVS_BE16_MAX; | |
2419 | return NULL; | |
2420 | } | |
2421 | return xasprintf("%s: port value out of range for %s", s, mf->name); | |
2422 | } | |
2423 | ||
2424 | static char * | |
2425 | mf_from_ofp_port_string32(const struct mf_field *mf, const char *s, | |
2426 | ovs_be32 *valuep, ovs_be32 *maskp) | |
2427 | { | |
2428 | ofp_port_t port; | |
2429 | ||
2430 | ovs_assert(mf->n_bytes == sizeof(ovs_be32)); | |
2431 | if (ofputil_port_from_string(s, &port)) { | |
2432 | *valuep = ofputil_port_to_ofp11(port); | |
2433 | *maskp = OVS_BE32_MAX; | |
2434 | return NULL; | |
2435 | } | |
2436 | return xasprintf("%s: port value out of range for %s", s, mf->name); | |
2437 | } | |
2438 | ||
2439 | struct frag_handling { | |
2440 | const char *name; | |
2441 | uint8_t mask; | |
2442 | uint8_t value; | |
2443 | }; | |
2444 | ||
2445 | static const struct frag_handling all_frags[] = { | |
2446 | #define A FLOW_NW_FRAG_ANY | |
2447 | #define L FLOW_NW_FRAG_LATER | |
2448 | /* name mask value */ | |
2449 | ||
2450 | { "no", A|L, 0 }, | |
2451 | { "first", A|L, A }, | |
2452 | { "later", A|L, A|L }, | |
2453 | ||
2454 | { "no", A, 0 }, | |
2455 | { "yes", A, A }, | |
2456 | ||
2457 | { "not_later", L, 0 }, | |
2458 | { "later", L, L }, | |
2459 | #undef A | |
2460 | #undef L | |
2461 | }; | |
2462 | ||
2463 | static char * | |
2464 | mf_from_frag_string(const char *s, uint8_t *valuep, uint8_t *maskp) | |
2465 | { | |
2466 | const struct frag_handling *h; | |
2467 | ||
2468 | for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) { | |
2469 | if (!strcasecmp(s, h->name)) { | |
2470 | /* We force the upper bits of the mask on to make mf_parse_value() | |
2471 | * happy (otherwise it will never think it's an exact match.) */ | |
2472 | *maskp = h->mask | ~FLOW_NW_FRAG_MASK; | |
2473 | *valuep = h->value; | |
2474 | return NULL; | |
2475 | } | |
2476 | } | |
2477 | ||
2478 | return xasprintf("%s: unknown fragment type (valid types are \"no\", " | |
2479 | "\"yes\", \"first\", \"later\", \"not_first\"", s); | |
2480 | } | |
2481 | ||
2482 | static int | |
2483 | parse_flow_tun_flags(const char *s_, const char *(*bit_to_string)(uint32_t), | |
2484 | ovs_be16 *res) | |
2485 | { | |
2486 | uint32_t result = 0; | |
2487 | char *save_ptr = NULL; | |
2488 | char *name; | |
2489 | int rc = 0; | |
2490 | char *s = xstrdup(s_); | |
2491 | ||
2492 | for (name = strtok_r((char *)s, " |", &save_ptr); name; | |
2493 | name = strtok_r(NULL, " |", &save_ptr)) { | |
2494 | int name_len; | |
2495 | unsigned long long int flags; | |
2496 | uint32_t bit; | |
2497 | ||
2498 | if (ovs_scan(name, "%lli", &flags)) { | |
2499 | result |= flags; | |
2500 | continue; | |
2501 | } | |
2502 | name_len = strlen(name); | |
2503 | for (bit = 1; bit; bit <<= 1) { | |
2504 | const char *fname = bit_to_string(bit); | |
2505 | size_t len; | |
2506 | ||
2507 | if (!fname) { | |
2508 | continue; | |
2509 | } | |
2510 | ||
2511 | len = strlen(fname); | |
2512 | if (len != name_len) { | |
2513 | continue; | |
2514 | } | |
2515 | if (!strncmp(name, fname, len)) { | |
2516 | result |= bit; | |
2517 | break; | |
2518 | } | |
2519 | } | |
2520 | ||
2521 | if (!bit) { | |
2522 | rc = -ENOENT; | |
2523 | goto out; | |
2524 | } | |
2525 | } | |
2526 | ||
2527 | *res = htons(result); | |
2528 | out: | |
2529 | free(s); | |
2530 | return rc; | |
2531 | } | |
2532 | ||
2533 | static char * | |
2534 | mf_from_tun_flags_string(const char *s, ovs_be16 *valuep, ovs_be16 *maskp) | |
2535 | { | |
2536 | if (!parse_flow_tun_flags(s, flow_tun_flag_to_string, valuep)) { | |
2537 | *maskp = OVS_BE16_MAX; | |
2538 | return NULL; | |
2539 | } | |
2540 | ||
2541 | return xasprintf("%s: unknown tunnel flags (valid flags are \"df\", " | |
2542 | "\"csum\", \"key\")", s); | |
2543 | } | |
2544 | ||
2545 | static char * | |
2546 | mf_from_tcp_flags_string(const char *s, ovs_be16 *flagsp, ovs_be16 *maskp) | |
2547 | { | |
2548 | uint16_t flags = 0; | |
2549 | uint16_t mask = 0; | |
2550 | uint16_t bit; | |
2551 | int n; | |
2552 | ||
2553 | if (ovs_scan(s, "%"SCNi16"/%"SCNi16"%n", &flags, &mask, &n) && !s[n]) { | |
2554 | *flagsp = htons(flags); | |
2555 | *maskp = htons(mask); | |
2556 | return NULL; | |
2557 | } | |
2558 | if (ovs_scan(s, "%"SCNi16"%n", &flags, &n) && !s[n]) { | |
2559 | *flagsp = htons(flags); | |
2560 | *maskp = OVS_BE16_MAX; | |
2561 | return NULL; | |
2562 | } | |
2563 | ||
2564 | while (*s != '\0') { | |
2565 | bool set; | |
2566 | int name_len; | |
2567 | ||
2568 | switch (*s) { | |
2569 | case '+': | |
2570 | set = true; | |
2571 | break; | |
2572 | case '-': | |
2573 | set = false; | |
2574 | break; | |
2575 | default: | |
2576 | return xasprintf("%s: TCP flag must be preceded by '+' (for SET) " | |
2577 | "or '-' (NOT SET)", s); | |
2578 | } | |
2579 | s++; | |
2580 | ||
2581 | name_len = strcspn(s,"+-"); | |
2582 | ||
2583 | for (bit = 1; bit; bit <<= 1) { | |
2584 | const char *fname = packet_tcp_flag_to_string(bit); | |
2585 | size_t len; | |
2586 | ||
2587 | if (!fname) { | |
2588 | continue; | |
2589 | } | |
2590 | ||
2591 | len = strlen(fname); | |
2592 | if (len != name_len) { | |
2593 | continue; | |
2594 | } | |
2595 | if (!strncmp(s, fname, len)) { | |
2596 | if (mask & bit) { | |
2597 | return xasprintf("%s: Each TCP flag can be specified only " | |
2598 | "once", s); | |
2599 | } | |
2600 | if (set) { | |
2601 | flags |= bit; | |
2602 | } | |
2603 | mask |= bit; | |
2604 | break; | |
2605 | } | |
2606 | } | |
2607 | ||
2608 | if (!bit) { | |
2609 | return xasprintf("%s: unknown TCP flag(s)", s); | |
2610 | } | |
2611 | s += name_len; | |
2612 | } | |
2613 | ||
2614 | *flagsp = htons(flags); | |
2615 | *maskp = htons(mask); | |
2616 | return NULL; | |
2617 | } | |
2618 | ||
2619 | ||
2620 | /* Parses 's', a string value for field 'mf', into 'value' and 'mask'. Returns | |
2621 | * NULL if successful, otherwise a malloc()'d string describing the error. */ | |
2622 | char * | |
2623 | mf_parse(const struct mf_field *mf, const char *s, | |
2624 | union mf_value *value, union mf_value *mask) | |
2625 | { | |
2626 | char *error; | |
2627 | ||
2628 | if (!strcmp(s, "*")) { | |
2629 | memset(value, 0, mf->n_bytes); | |
2630 | memset(mask, 0, mf->n_bytes); | |
2631 | return NULL; | |
2632 | } | |
2633 | ||
2634 | switch (mf->string) { | |
2635 | case MFS_DECIMAL: | |
2636 | case MFS_HEXADECIMAL: | |
2637 | error = mf_from_integer_string(mf, s, | |
2638 | (uint8_t *) value, (uint8_t *) mask); | |
2639 | break; | |
2640 | ||
2641 | case MFS_ETHERNET: | |
2642 | error = mf_from_ethernet_string(mf, s, value->mac, mask->mac); | |
2643 | break; | |
2644 | ||
2645 | case MFS_IPV4: | |
2646 | error = mf_from_ipv4_string(mf, s, &value->be32, &mask->be32); | |
2647 | break; | |
2648 | ||
2649 | case MFS_IPV6: | |
2650 | error = mf_from_ipv6_string(mf, s, &value->ipv6, &mask->ipv6); | |
2651 | break; | |
2652 | ||
2653 | case MFS_OFP_PORT: | |
2654 | error = mf_from_ofp_port_string(mf, s, &value->be16, &mask->be16); | |
2655 | break; | |
2656 | ||
2657 | case MFS_OFP_PORT_OXM: | |
2658 | error = mf_from_ofp_port_string32(mf, s, &value->be32, &mask->be32); | |
2659 | break; | |
2660 | ||
2661 | case MFS_FRAG: | |
2662 | error = mf_from_frag_string(s, &value->u8, &mask->u8); | |
2663 | break; | |
2664 | ||
2665 | case MFS_TNL_FLAGS: | |
2666 | ovs_assert(mf->n_bytes == sizeof(ovs_be16)); | |
2667 | error = mf_from_tun_flags_string(s, &value->be16, &mask->be16); | |
2668 | break; | |
2669 | ||
2670 | case MFS_TCP_FLAGS: | |
2671 | ovs_assert(mf->n_bytes == sizeof(ovs_be16)); | |
2672 | error = mf_from_tcp_flags_string(s, &value->be16, &mask->be16); | |
2673 | break; | |
2674 | ||
2675 | default: | |
2676 | NOT_REACHED(); | |
2677 | } | |
2678 | ||
2679 | if (!error && !mf_is_mask_valid(mf, mask)) { | |
2680 | error = xasprintf("%s: invalid mask for field %s", s, mf->name); | |
2681 | } | |
2682 | return error; | |
2683 | } | |
2684 | ||
2685 | /* Parses 's', a string value for field 'mf', into 'value'. Returns NULL if | |
2686 | * successful, otherwise a malloc()'d string describing the error. */ | |
2687 | char * | |
2688 | mf_parse_value(const struct mf_field *mf, const char *s, union mf_value *value) | |
2689 | { | |
2690 | union mf_value mask; | |
2691 | char *error; | |
2692 | ||
2693 | error = mf_parse(mf, s, value, &mask); | |
2694 | if (error) { | |
2695 | return error; | |
2696 | } | |
2697 | ||
2698 | if (!is_all_ones((const uint8_t *) &mask, mf->n_bytes)) { | |
2699 | return xasprintf("%s: wildcards not allowed here", s); | |
2700 | } | |
2701 | return NULL; | |
2702 | } | |
2703 | ||
2704 | static void | |
2705 | mf_format_integer_string(const struct mf_field *mf, const uint8_t *valuep, | |
2706 | const uint8_t *maskp, struct ds *s) | |
2707 | { | |
2708 | unsigned long long int integer; | |
2709 | int i; | |
2710 | ||
2711 | ovs_assert(mf->n_bytes <= 8); | |
2712 | ||
2713 | integer = 0; | |
2714 | for (i = 0; i < mf->n_bytes; i++) { | |
2715 | integer = (integer << 8) | valuep[i]; | |
2716 | } | |
2717 | if (mf->string == MFS_HEXADECIMAL) { | |
2718 | ds_put_format(s, "%#llx", integer); | |
2719 | } else { | |
2720 | ds_put_format(s, "%lld", integer); | |
2721 | } | |
2722 | ||
2723 | if (maskp) { | |
2724 | unsigned long long int mask; | |
2725 | ||
2726 | mask = 0; | |
2727 | for (i = 0; i < mf->n_bytes; i++) { | |
2728 | mask = (mask << 8) | maskp[i]; | |
2729 | } | |
2730 | ||
2731 | /* I guess we could write the mask in decimal for MFS_DECIMAL but I'm | |
2732 | * not sure that that a bit-mask written in decimal is ever easier to | |
2733 | * understand than the same bit-mask written in hexadecimal. */ | |
2734 | ds_put_format(s, "/%#llx", mask); | |
2735 | } | |
2736 | } | |
2737 | ||
2738 | static void | |
2739 | mf_format_frag_string(uint8_t value, uint8_t mask, struct ds *s) | |
2740 | { | |
2741 | const struct frag_handling *h; | |
2742 | ||
2743 | mask &= FLOW_NW_FRAG_MASK; | |
2744 | value &= mask; | |
2745 | ||
2746 | for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) { | |
2747 | if (value == h->value && mask == h->mask) { | |
2748 | ds_put_cstr(s, h->name); | |
2749 | return; | |
2750 | } | |
2751 | } | |
2752 | ds_put_cstr(s, "<error>"); | |
2753 | } | |
2754 | ||
2755 | static void | |
2756 | mf_format_tnl_flags_string(const ovs_be16 *valuep, struct ds *s) | |
2757 | { | |
2758 | format_flags(s, flow_tun_flag_to_string, ntohs(*valuep), '|'); | |
2759 | } | |
2760 | ||
2761 | static void | |
2762 | mf_format_tcp_flags_string(ovs_be16 value, ovs_be16 mask, struct ds *s) | |
2763 | { | |
2764 | format_flags_masked(s, NULL, packet_tcp_flag_to_string, ntohs(value), | |
2765 | TCP_FLAGS(mask)); | |
2766 | } | |
2767 | ||
2768 | /* Appends to 's' a string representation of field 'mf' whose value is in | |
2769 | * 'value' and 'mask'. 'mask' may be NULL to indicate an exact match. */ | |
2770 | void | |
2771 | mf_format(const struct mf_field *mf, | |
2772 | const union mf_value *value, const union mf_value *mask, | |
2773 | struct ds *s) | |
2774 | { | |
2775 | if (mask) { | |
2776 | if (is_all_zeros((const uint8_t *) mask, mf->n_bytes)) { | |
2777 | ds_put_cstr(s, "ANY"); | |
2778 | return; | |
2779 | } else if (is_all_ones((const uint8_t *) mask, mf->n_bytes)) { | |
2780 | mask = NULL; | |
2781 | } | |
2782 | } | |
2783 | ||
2784 | switch (mf->string) { | |
2785 | case MFS_OFP_PORT_OXM: | |
2786 | if (!mask) { | |
2787 | ofp_port_t port; | |
2788 | ofputil_port_from_ofp11(value->be32, &port); | |
2789 | ofputil_format_port(port, s); | |
2790 | break; | |
2791 | } | |
2792 | /* fall through */ | |
2793 | case MFS_OFP_PORT: | |
2794 | if (!mask) { | |
2795 | ofputil_format_port(u16_to_ofp(ntohs(value->be16)), s); | |
2796 | break; | |
2797 | } | |
2798 | /* fall through */ | |
2799 | case MFS_DECIMAL: | |
2800 | case MFS_HEXADECIMAL: | |
2801 | mf_format_integer_string(mf, (uint8_t *) value, (uint8_t *) mask, s); | |
2802 | break; | |
2803 | ||
2804 | case MFS_ETHERNET: | |
2805 | eth_format_masked(value->mac, mask->mac, s); | |
2806 | break; | |
2807 | ||
2808 | case MFS_IPV4: | |
2809 | ip_format_masked(value->be32, mask ? mask->be32 : OVS_BE32_MAX, s); | |
2810 | break; | |
2811 | ||
2812 | case MFS_IPV6: | |
2813 | print_ipv6_masked(s, &value->ipv6, mask ? &mask->ipv6 : NULL); | |
2814 | break; | |
2815 | ||
2816 | case MFS_FRAG: | |
2817 | mf_format_frag_string(value->u8, mask ? mask->u8 : UINT8_MAX, s); | |
2818 | break; | |
2819 | ||
2820 | case MFS_TNL_FLAGS: | |
2821 | mf_format_tnl_flags_string(&value->be16, s); | |
2822 | break; | |
2823 | ||
2824 | case MFS_TCP_FLAGS: | |
2825 | mf_format_tcp_flags_string(value->be16, | |
2826 | mask ? mask->be16 : OVS_BE16_MAX, s); | |
2827 | break; | |
2828 | ||
2829 | default: | |
2830 | NOT_REACHED(); | |
2831 | } | |
2832 | } | |
2833 | \f | |
2834 | /* Makes subfield 'sf' within 'flow' exactly match the 'sf->n_bits' | |
2835 | * least-significant bits in 'x'. | |
2836 | */ | |
2837 | void | |
2838 | mf_write_subfield_flow(const struct mf_subfield *sf, | |
2839 | const union mf_subvalue *x, struct flow *flow) | |
2840 | { | |
2841 | const struct mf_field *field = sf->field; | |
2842 | union mf_value value; | |
2843 | ||
2844 | mf_get_value(field, flow, &value); | |
2845 | bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes, | |
2846 | sf->ofs, sf->n_bits); | |
2847 | mf_set_flow_value(field, &value, flow); | |
2848 | } | |
2849 | ||
2850 | /* Makes subfield 'sf' within 'match' exactly match the 'sf->n_bits' | |
2851 | * least-significant bits in 'x'. | |
2852 | */ | |
2853 | void | |
2854 | mf_write_subfield(const struct mf_subfield *sf, const union mf_subvalue *x, | |
2855 | struct match *match) | |
2856 | { | |
2857 | const struct mf_field *field = sf->field; | |
2858 | union mf_value value, mask; | |
2859 | ||
2860 | mf_get(field, match, &value, &mask); | |
2861 | bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes, sf->ofs, sf->n_bits); | |
2862 | bitwise_one ( &mask, field->n_bytes, sf->ofs, sf->n_bits); | |
2863 | mf_set(field, &value, &mask, match); | |
2864 | } | |
2865 | ||
2866 | /* Initializes 'x' to the value of 'sf' within 'flow'. 'sf' must be valid for | |
2867 | * reading 'flow', e.g. as checked by mf_check_src(). */ | |
2868 | void | |
2869 | mf_read_subfield(const struct mf_subfield *sf, const struct flow *flow, | |
2870 | union mf_subvalue *x) | |
2871 | { | |
2872 | union mf_value value; | |
2873 | ||
2874 | mf_get_value(sf->field, flow, &value); | |
2875 | ||
2876 | memset(x, 0, sizeof *x); | |
2877 | bitwise_copy(&value, sf->field->n_bytes, sf->ofs, | |
2878 | x, sizeof *x, 0, | |
2879 | sf->n_bits); | |
2880 | } | |
2881 | ||
2882 | /* Returns the value of 'sf' within 'flow'. 'sf' must be valid for reading | |
2883 | * 'flow', e.g. as checked by mf_check_src() and sf->n_bits must be 64 or | |
2884 | * less. */ | |
2885 | uint64_t | |
2886 | mf_get_subfield(const struct mf_subfield *sf, const struct flow *flow) | |
2887 | { | |
2888 | union mf_value value; | |
2889 | ||
2890 | mf_get_value(sf->field, flow, &value); | |
2891 | return bitwise_get(&value, sf->field->n_bytes, sf->ofs, sf->n_bits); | |
2892 | } | |
2893 | ||
2894 | /* Formats 'sf' into 's' in a format normally acceptable to | |
2895 | * mf_parse_subfield(). (It won't be acceptable if sf->field is NULL or if | |
2896 | * sf->field has no NXM name.) */ | |
2897 | void | |
2898 | mf_format_subfield(const struct mf_subfield *sf, struct ds *s) | |
2899 | { | |
2900 | if (!sf->field) { | |
2901 | ds_put_cstr(s, "<unknown>"); | |
2902 | } else if (sf->field->nxm_name) { | |
2903 | ds_put_cstr(s, sf->field->nxm_name); | |
2904 | } else if (sf->field->nxm_header) { | |
2905 | uint32_t header = sf->field->nxm_header; | |
2906 | ds_put_format(s, "%d:%d", NXM_VENDOR(header), NXM_FIELD(header)); | |
2907 | } else { | |
2908 | ds_put_cstr(s, sf->field->name); | |
2909 | } | |
2910 | ||
2911 | if (sf->field && sf->ofs == 0 && sf->n_bits == sf->field->n_bits) { | |
2912 | ds_put_cstr(s, "[]"); | |
2913 | } else if (sf->n_bits == 1) { | |
2914 | ds_put_format(s, "[%d]", sf->ofs); | |
2915 | } else { | |
2916 | ds_put_format(s, "[%d..%d]", sf->ofs, sf->ofs + sf->n_bits - 1); | |
2917 | } | |
2918 | } | |
2919 | ||
2920 | static const struct mf_field * | |
2921 | mf_parse_subfield_name(const char *name, int name_len, bool *wild) | |
2922 | { | |
2923 | int i; | |
2924 | ||
2925 | *wild = name_len > 2 && !memcmp(&name[name_len - 2], "_W", 2); | |
2926 | if (*wild) { | |
2927 | name_len -= 2; | |
2928 | } | |
2929 | ||
2930 | for (i = 0; i < MFF_N_IDS; i++) { | |
2931 | const struct mf_field *mf = mf_from_id(i); | |
2932 | ||
2933 | if (mf->nxm_name | |
2934 | && !strncmp(mf->nxm_name, name, name_len) | |
2935 | && mf->nxm_name[name_len] == '\0') { | |
2936 | return mf; | |
2937 | } | |
2938 | if (mf->oxm_name | |
2939 | && !strncmp(mf->oxm_name, name, name_len) | |
2940 | && mf->oxm_name[name_len] == '\0') { | |
2941 | return mf; | |
2942 | } | |
2943 | } | |
2944 | ||
2945 | return NULL; | |
2946 | } | |
2947 | ||
2948 | /* Parses a subfield from the beginning of '*sp' into 'sf'. If successful, | |
2949 | * returns NULL and advances '*sp' to the first byte following the parsed | |
2950 | * string. On failure, returns a malloc()'d error message, does not modify | |
2951 | * '*sp', and does not properly initialize 'sf'. | |
2952 | * | |
2953 | * The syntax parsed from '*sp' takes the form "header[start..end]" where | |
2954 | * 'header' is the name of an NXM field and 'start' and 'end' are (inclusive) | |
2955 | * bit indexes. "..end" may be omitted to indicate a single bit. "start..end" | |
2956 | * may both be omitted (the [] are still required) to indicate an entire | |
2957 | * field. */ | |
2958 | char * WARN_UNUSED_RESULT | |
2959 | mf_parse_subfield__(struct mf_subfield *sf, const char **sp) | |
2960 | { | |
2961 | const struct mf_field *field; | |
2962 | const char *name; | |
2963 | int start, end; | |
2964 | const char *s; | |
2965 | int name_len; | |
2966 | bool wild; | |
2967 | ||
2968 | s = *sp; | |
2969 | name = s; | |
2970 | name_len = strcspn(s, "["); | |
2971 | if (s[name_len] != '[') { | |
2972 | return xasprintf("%s: missing [ looking for field name", *sp); | |
2973 | } | |
2974 | ||
2975 | field = mf_parse_subfield_name(name, name_len, &wild); | |
2976 | if (!field) { | |
2977 | return xasprintf("%s: unknown field `%.*s'", *sp, name_len, s); | |
2978 | } | |
2979 | ||
2980 | s += name_len; | |
2981 | if (ovs_scan(s, "[%d..%d]", &start, &end)) { | |
2982 | /* Nothing to do. */ | |
2983 | } else if (ovs_scan(s, "[%d]", &start)) { | |
2984 | end = start; | |
2985 | } else if (!strncmp(s, "[]", 2)) { | |
2986 | start = 0; | |
2987 | end = field->n_bits - 1; | |
2988 | } else { | |
2989 | return xasprintf("%s: syntax error expecting [] or [<bit>] or " | |
2990 | "[<start>..<end>]", *sp); | |
2991 | } | |
2992 | s = strchr(s, ']') + 1; | |
2993 | ||
2994 | if (start > end) { | |
2995 | return xasprintf("%s: starting bit %d is after ending bit %d", | |
2996 | *sp, start, end); | |
2997 | } else if (start >= field->n_bits) { | |
2998 | return xasprintf("%s: starting bit %d is not valid because field is " | |
2999 | "only %d bits wide", *sp, start, field->n_bits); | |
3000 | } else if (end >= field->n_bits){ | |
3001 | return xasprintf("%s: ending bit %d is not valid because field is " | |
3002 | "only %d bits wide", *sp, end, field->n_bits); | |
3003 | } | |
3004 | ||
3005 | sf->field = field; | |
3006 | sf->ofs = start; | |
3007 | sf->n_bits = end - start + 1; | |
3008 | ||
3009 | *sp = s; | |
3010 | return NULL; | |
3011 | } | |
3012 | ||
3013 | /* Parses a subfield from the entirety of 's' into 'sf'. Returns NULL if | |
3014 | * successful, otherwise a malloc()'d string describing the error. The caller | |
3015 | * is responsible for freeing the returned string. | |
3016 | * | |
3017 | * The syntax parsed from 's' takes the form "header[start..end]" where | |
3018 | * 'header' is the name of an NXM field and 'start' and 'end' are (inclusive) | |
3019 | * bit indexes. "..end" may be omitted to indicate a single bit. "start..end" | |
3020 | * may both be omitted (the [] are still required) to indicate an entire | |
3021 | * field. */ | |
3022 | char * WARN_UNUSED_RESULT | |
3023 | mf_parse_subfield(struct mf_subfield *sf, const char *s) | |
3024 | { | |
3025 | char *error = mf_parse_subfield__(sf, &s); | |
3026 | if (!error && s[0]) { | |
3027 | error = xstrdup("unexpected input following field syntax"); | |
3028 | } | |
3029 | return error; | |
3030 | } | |
3031 | ||
3032 | void | |
3033 | mf_format_subvalue(const union mf_subvalue *subvalue, struct ds *s) | |
3034 | { | |
3035 | int i; | |
3036 | ||
3037 | for (i = 0; i < ARRAY_SIZE(subvalue->u8); i++) { | |
3038 | if (subvalue->u8[i]) { | |
3039 | ds_put_format(s, "0x%"PRIx8, subvalue->u8[i]); | |
3040 | for (i++; i < ARRAY_SIZE(subvalue->u8); i++) { | |
3041 | ds_put_format(s, "%02"PRIx8, subvalue->u8[i]); | |
3042 | } | |
3043 | return; | |
3044 | } | |
3045 | } | |
3046 | ds_put_char(s, '0'); | |
3047 | } |