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flow: Rearrange IPv6 addresses to remove potential hole in structure.
[ovs.git] / lib / meta-flow.c
CommitLineData
6a885fd0
BP		 1/*
2 * Copyright (c) 2011 Nicira Networks.
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 <assert.h>
22#include <errno.h>
23#include <limits.h>
24#include <netinet/icmp6.h>
25#include <netinet/ip6.h>
26
27#include "classifier.h"
28#include "dynamic-string.h"
29#include "ofp-util.h"
30#include "packets.h"
31#include "random.h"
32#include "shash.h"
33#include "socket-util.h"
34#include "unaligned.h"
35
36#define MF_FIELD_SIZES(MEMBER) \
37 sizeof ((union mf_value *)0)->MEMBER, \
38 8 * sizeof ((union mf_value *)0)->MEMBER
39
40static const struct mf_field mf_fields[MFF_N_IDS] = {
41 /* ## -------- ## */
42 /* ## metadata ## */
43 /* ## -------- ## */
44
45 {
46 MFF_TUN_ID, "tun_id", NULL,
47 MF_FIELD_SIZES(be64),
48 MFM_FULLY, 0,
49 MFS_HEXADECIMAL,
50 MFP_NONE,
51 NXM_NX_TUN_ID,
52 }, {
53 MFF_IN_PORT, "in_port", NULL,
54 MF_FIELD_SIZES(be16),
55 MFM_NONE, FWW_IN_PORT,
56 MFS_OFP_PORT,
57 MFP_NONE,
58 NXM_OF_IN_PORT,
59 },
60
61#define REGISTER(IDX) \
62 { \
63 MFF_REG##IDX, "reg" #IDX, NULL, \
64 MF_FIELD_SIZES(be32), \
65 MFM_FULLY, 0, \
66 MFS_HEXADECIMAL, \
67 MFP_NONE, \
68 NXM_NX_REG(IDX), \
69 }
70#if FLOW_N_REGS > 0
71 REGISTER(0),
72#endif
73#if FLOW_N_REGS > 1
74 REGISTER(1),
75#endif
76#if FLOW_N_REGS > 2
77 REGISTER(2),
78#endif
79#if FLOW_N_REGS > 3
80 REGISTER(3),
81#endif
82#if FLOW_N_REGS > 4
d2c0fed9
JP		 83 REGISTER(4),
84#endif
85#if FLOW_N_REGS > 5
6a885fd0
BP		 86#error
87#endif
88
89 /* ## -- ## */
90 /* ## L2 ## */
91 /* ## -- ## */
92
93 {
94 MFF_ETH_SRC, "eth_src", "dl_src",
95 MF_FIELD_SIZES(mac),
96 MFM_NONE, FWW_DL_SRC,
97 MFS_ETHERNET,
98 MFP_NONE,
99 NXM_OF_ETH_SRC,
100 }, {
101 MFF_ETH_DST, "eth_dst", "dl_dst",
102 MF_FIELD_SIZES(mac),
103 MFM_MCAST, 0,
104 MFS_ETHERNET,
105 MFP_NONE,
106 NXM_OF_ETH_DST,
107 }, {
108 MFF_ETH_TYPE, "eth_type", "dl_type",
109 MF_FIELD_SIZES(be16),
110 MFM_NONE, FWW_DL_TYPE,
111 MFS_HEXADECIMAL,
112 MFP_NONE,
113 NXM_OF_ETH_TYPE,
114 },
115
116 {
117 MFF_VLAN_TCI, "vlan_tci", NULL,
118 MF_FIELD_SIZES(be16),
119 MFM_FULLY, 0,
120 MFS_HEXADECIMAL,
121 MFP_NONE,
122 NXM_OF_VLAN_TCI,
123 }, {
124 MFF_VLAN_VID, "dl_vlan", NULL,
125 sizeof(ovs_be16), 12,
126 MFM_NONE, 0,
127 MFS_DECIMAL,
128 MFP_NONE,
129 0,
130 }, {
131 MFF_VLAN_PCP, "dl_vlan_pcp", NULL,
132 1, 3,
133 MFM_NONE, 0,
134 MFS_DECIMAL,
135 MFP_NONE,
136 0,
137 },
138
139 /* ## -- ## */
140 /* ## L3 ## */
141 /* ## -- ## */
142
143 {
144 MFF_IPV4_SRC, "ip_src", "nw_src",
145 MF_FIELD_SIZES(be32),
146 MFM_CIDR, 0,
147 MFS_IPV4,
148 MFP_IPV4,
149 NXM_OF_IP_SRC,
150 }, {
151 MFF_IPV4_DST, "ip_dst", "nw_dst",
152 MF_FIELD_SIZES(be32),
153 MFM_CIDR, 0,
154 MFS_IPV4,
155 MFP_IPV4,
156 NXM_OF_IP_DST,
157 },
158
159 {
160 MFF_IPV6_SRC, "ipv6_src", NULL,
161 MF_FIELD_SIZES(ipv6),
162 MFM_CIDR, 0,
163 MFS_IPV6,
164 MFP_IPV6,
165 NXM_NX_IPV6_SRC,
166 }, {
167 MFF_IPV6_DST, "ipv6_dst", NULL,
168 MF_FIELD_SIZES(ipv6),
169 MFM_CIDR, 0,
170 MFS_IPV6,
171 MFP_IPV6,
172 NXM_NX_IPV6_DST,
173 },
174
175 {
176 MFF_IP_PROTO, "nw_proto", NULL,
177 MF_FIELD_SIZES(u8),
178 MFM_NONE, FWW_NW_PROTO,
179 MFS_DECIMAL,
180 MFP_IP_ANY,
181 NXM_OF_IP_PROTO,
182 }, {
183 MFF_IP_TOS, "nw_tos", NULL,
184 MF_FIELD_SIZES(u8),
7257b535 185 MFM_NONE, 0,
6a885fd0
BP		 186 MFS_DECIMAL,
187 MFP_IP_ANY,
188 NXM_OF_IP_TOS,
7257b535
BP		 189 }, {
190 MFF_IP_FRAG, "ip_frag", NULL,
191 1, 2,
192 MFM_FULLY, 0,
193 MFS_FRAG,
194 MFP_IP_ANY,
195 NXM_NX_IP_FRAG,
6a885fd0
BP		 196 },
197
198 {
199 MFF_ARP_OP, "arp_op", NULL,
200 MF_FIELD_SIZES(be16),
201 MFM_NONE, FWW_NW_PROTO,
202 MFS_DECIMAL,
203 MFP_ARP,
204 NXM_OF_ARP_OP,
205 }, {
206 MFF_ARP_SPA, "arp_spa", NULL,
207 MF_FIELD_SIZES(be32),
208 MFM_CIDR, 0,
209 MFS_IPV4,
210 MFP_ARP,
211 NXM_OF_ARP_SPA,
212 }, {
213 MFF_ARP_TPA, "arp_tpa", NULL,
214 MF_FIELD_SIZES(be32),
215 MFM_CIDR, 0,
216 MFS_IPV4,
217 MFP_ARP,
218 NXM_OF_ARP_TPA,
219 }, {
220 MFF_ARP_SHA, "arp_sha", NULL,
221 MF_FIELD_SIZES(mac),
222 MFM_NONE, FWW_ARP_SHA,
223 MFS_ETHERNET,
224 MFP_ARP,
225 NXM_NX_ARP_SHA,
226 }, {
227 MFF_ARP_THA, "arp_tha", NULL,
228 MF_FIELD_SIZES(mac),
229 MFM_NONE, FWW_ARP_THA,
230 MFS_ETHERNET,
231 MFP_ARP,
232 NXM_NX_ARP_THA,
233 },
234
235 /* ## -- ## */
236 /* ## L4 ## */
237 /* ## -- ## */
238
239 {
240 MFF_TCP_SRC, "tcp_src", "tp_src",
241 MF_FIELD_SIZES(be16),
242 MFM_NONE, FWW_TP_SRC,
243 MFS_DECIMAL,
244 MFP_TCP,
245 NXM_OF_TCP_SRC,
246 }, {
247 MFF_TCP_DST, "tcp_dst", "tp_dst",
248 MF_FIELD_SIZES(be16),
249 MFM_NONE, FWW_TP_DST,
250 MFS_DECIMAL,
251 MFP_TCP,
252 NXM_OF_TCP_DST,
253 },
254
255 {
256 MFF_UDP_SRC, "udp_src", NULL,
257 MF_FIELD_SIZES(be16),
258 MFM_NONE, FWW_TP_SRC,
259 MFS_DECIMAL,
260 MFP_UDP,
261 NXM_OF_UDP_SRC,
262 }, {
263 MFF_UDP_DST, "udp_dst", NULL,
264 MF_FIELD_SIZES(be16),
265 MFM_NONE, FWW_TP_DST,
266 MFS_DECIMAL,
267 MFP_UDP,
268 NXM_OF_UDP_DST,
269 },
270
271 {
272 MFF_ICMP_TYPE, "icmp_type", NULL,
273 MF_FIELD_SIZES(u8),
274 MFM_NONE, FWW_TP_SRC,
275 MFS_DECIMAL,
276 MFP_ICMP_ANY,
277 NXM_OF_ICMP_TYPE,
278 }, {
279 MFF_ICMP_CODE, "icmp_code", NULL,
280 MF_FIELD_SIZES(u8),
029b26f3 281 MFM_NONE, FWW_TP_DST,
6a885fd0
BP		 282 MFS_DECIMAL,
283 MFP_ICMP_ANY,
284 NXM_OF_ICMP_CODE,
285 },
286
287 /* ## ---- ## */
288 /* ## L"5" ## */
289 /* ## ---- ## */
290
291 {
292 MFF_ND_TARGET, "nd_target", NULL,
293 MF_FIELD_SIZES(ipv6),
294 MFM_NONE, FWW_ND_TARGET,
295 MFS_IPV6,
296 MFP_ND,
297 NXM_NX_ND_TARGET,
298 }, {
299 MFF_ND_SLL, "nd_sll", NULL,
300 MF_FIELD_SIZES(mac),
301 MFM_NONE, FWW_ARP_SHA,
302 MFS_ETHERNET,
303 MFP_ND_SOLICIT,
304 NXM_NX_ND_SLL,
305 }, {
306 MFF_ND_TLL, "nd_tll", NULL,
307 MF_FIELD_SIZES(mac),
308 MFM_NONE, FWW_ARP_THA,
309 MFS_ETHERNET,
310 MFP_ND_ADVERT,
311 NXM_NX_ND_TLL,
312 }
313};
314
6a885fd0
BP		 315/* Returns the field with the given 'id'. */
316const struct mf_field *
317mf_from_id(enum mf_field_id id)
318{
319 assert((unsigned int) id < MFF_N_IDS);
320 return &mf_fields[id];
321}
322
323/* Returns the field with the given 'name', or a null pointer if no field has
324 * that name. */
325const struct mf_field *
326mf_from_name(const char *name)
327{
328 static struct shash mf_by_name = SHASH_INITIALIZER(&mf_by_name);
329
330 if (shash_is_empty(&mf_by_name)) {
331 const struct mf_field *mf;
332
333 for (mf = mf_fields; mf < &mf_fields[MFF_N_IDS]; mf++) {
334 shash_add_once(&mf_by_name, mf->name, mf);
335 if (mf->extra_name) {
336 shash_add_once(&mf_by_name, mf->extra_name, mf);
337 }
338 }
339 }
340
341 return shash_find_data(&mf_by_name, name);
342}
343
344/* Returns true if 'wc' wildcards all the bits in field 'mf', false if 'wc'
345 * specifies at least one bit in the field.
346 *
347 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
348 * meets 'mf''s prerequisites. */
349bool
350mf_is_all_wild(const struct mf_field *mf, const struct flow_wildcards *wc)
351{
352 switch (mf->id) {
353 case MFF_IN_PORT:
354 case MFF_ETH_SRC:
355 case MFF_ETH_TYPE:
356 case MFF_IP_PROTO:
6a885fd0
BP		 357 case MFF_ARP_OP:
358 case MFF_ARP_SHA:
359 case MFF_ARP_THA:
360 case MFF_TCP_SRC:
361 case MFF_TCP_DST:
362 case MFF_UDP_SRC:
363 case MFF_UDP_DST:
364 case MFF_ICMP_TYPE:
365 case MFF_ICMP_CODE:
366 case MFF_ND_TARGET:
367 case MFF_ND_SLL:
368 case MFF_ND_TLL:
369 assert(mf->fww_bit != 0);
370 return (wc->wildcards & mf->fww_bit) != 0;
371
372 case MFF_TUN_ID:
373 return !wc->tun_id_mask;
374
375#if FLOW_N_REGS > 0
376 case MFF_REG0:
377#endif
378#if FLOW_N_REGS > 1
379 case MFF_REG1:
380#endif
381#if FLOW_N_REGS > 2
382 case MFF_REG2:
383#endif
384#if FLOW_N_REGS > 3
385 case MFF_REG3:
386#endif
387#if FLOW_N_REGS > 4
d2c0fed9
JP		 388 case MFF_REG4:
389#endif
390#if FLOW_N_REGS > 5
6a885fd0
BP		 391#error
392#endif
393 return !wc->reg_masks[mf->id - MFF_REG0];
394
395 case MFF_ETH_DST:
396 return ((wc->wildcards & (FWW_ETH_MCAST | FWW_DL_DST))
397 == (FWW_ETH_MCAST | FWW_DL_DST));
398
399 case MFF_VLAN_TCI:
400 return !wc->vlan_tci_mask;
401 case MFF_VLAN_VID:
402 return !(wc->vlan_tci_mask & htons(VLAN_VID_MASK));
403 case MFF_VLAN_PCP:
404 return !(wc->vlan_tci_mask & htons(VLAN_PCP_MASK));
405
406 case MFF_IPV4_SRC:
407 return !wc->nw_src_mask;
408 case MFF_IPV4_DST:
409 return !wc->nw_dst_mask;
410
411 case MFF_IPV6_SRC:
412 return ipv6_mask_is_any(&wc->ipv6_src_mask);
413 case MFF_IPV6_DST:
414 return ipv6_mask_is_any(&wc->ipv6_dst_mask);
415
7257b535
BP		 416 case MFF_IP_TOS:
417 return !(wc->tos_frag_mask & IP_DSCP_MASK);
418 case MFF_IP_FRAG:
419 return !(wc->tos_frag_mask & FLOW_FRAG_MASK);
420
6a885fd0
BP		 421 case MFF_ARP_SPA:
422 return !wc->nw_src_mask;
423 case MFF_ARP_TPA:
424 return !wc->nw_dst_mask;
425
426 case MFF_N_IDS:
427 default:
428 NOT_REACHED();
429 }
430}
431
432/* Initializes 'mask' with the wildcard bit pattern for field 'mf' within 'wc'.
433 * Each bit in 'mask' will be set to 1 if the bit is significant for matching
434 * purposes, or to 0 if it is wildcarded.
435 *
436 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
437 * meets 'mf''s prerequisites. */
438void
439mf_get_mask(const struct mf_field *mf, const struct flow_wildcards *wc,
440 union mf_value *mask)
441{
442 switch (mf->id) {
443 case MFF_IN_PORT:
444 case MFF_ETH_SRC:
445 case MFF_ETH_TYPE:
446 case MFF_IP_PROTO:
6a885fd0
BP		 447 case MFF_ARP_OP:
448 case MFF_ARP_SHA:
449 case MFF_ARP_THA:
450 case MFF_TCP_SRC:
451 case MFF_TCP_DST:
452 case MFF_UDP_SRC:
453 case MFF_UDP_DST:
454 case MFF_ICMP_TYPE:
455 case MFF_ICMP_CODE:
456 case MFF_ND_TARGET:
457 case MFF_ND_SLL:
458 case MFF_ND_TLL:
459 assert(mf->fww_bit != 0);
460 memset(mask, wc->wildcards & mf->fww_bit ? 0x00 : 0xff, mf->n_bytes);
461 break;
462
463 case MFF_TUN_ID:
464 mask->be64 = wc->tun_id_mask;
465 break;
466
467#if FLOW_N_REGS > 0
468 case MFF_REG0:
469#endif
470#if FLOW_N_REGS > 1
471 case MFF_REG1:
472#endif
473#if FLOW_N_REGS > 2
474 case MFF_REG2:
475#endif
476#if FLOW_N_REGS > 3
477 case MFF_REG3:
478#endif
479#if FLOW_N_REGS > 4
d2c0fed9
JP		 480 case MFF_REG4:
481#endif
482#if FLOW_N_REGS > 5
6a885fd0
BP		 483#error
484#endif
485 mask->be32 = htonl(wc->reg_masks[mf->id - MFF_REG0]);
486 break;
487
488 case MFF_ETH_DST:
489 memcpy(mask->mac, flow_wildcards_to_dl_dst_mask(wc->wildcards),
490 ETH_ADDR_LEN);
491 break;
492
493 case MFF_VLAN_TCI:
494 mask->be16 = wc->vlan_tci_mask;
495 break;
496 case MFF_VLAN_VID:
497 mask->be16 = wc->vlan_tci_mask & htons(VLAN_VID_MASK);
498 break;
499 case MFF_VLAN_PCP:
500 mask->u8 = vlan_tci_to_pcp(wc->vlan_tci_mask);
501 break;
502
503 case MFF_IPV4_SRC:
504 mask->be32 = wc->nw_src_mask;
505 break;
506 case MFF_IPV4_DST:
507 mask->be32 = wc->nw_dst_mask;
508 break;
509
510 case MFF_IPV6_SRC:
511 mask->ipv6 = wc->ipv6_src_mask;
512 break;
513 case MFF_IPV6_DST:
514 mask->ipv6 = wc->ipv6_dst_mask;
515 break;
516
7257b535
BP		 517 case MFF_IP_TOS:
518 mask->u8 = wc->tos_frag_mask & IP_DSCP_MASK;
519 break;
520 case MFF_IP_FRAG:
521 mask->u8 = wc->tos_frag_mask & FLOW_FRAG_MASK;
522 break;
523
6a885fd0
BP		 524 case MFF_ARP_SPA:
525 mask->be32 = wc->nw_src_mask;
526 break;
527 case MFF_ARP_TPA:
528 mask->be32 = wc->nw_dst_mask;
529 break;
530
531 case MFF_N_IDS:
532 default:
533 NOT_REACHED();
534 }
535}
536
537/* Tests whether 'mask' is a valid wildcard bit pattern for 'mf'. Returns true
538 * if the mask is valid, false otherwise. */
539bool
540mf_is_mask_valid(const struct mf_field *mf, const union mf_value *mask)
541{
542 switch (mf->maskable) {
543 case MFM_NONE:
544 return (is_all_zeros((const uint8_t *) mask, mf->n_bytes) ||
545 is_all_ones((const uint8_t *) mask, mf->n_bytes));
546
547 case MFM_FULLY:
548 return true;
549
550 case MFM_CIDR:
551 return (mf->n_bytes == 4
552 ? ip_is_cidr(mask->be32)
553 : ipv6_is_cidr(&mask->ipv6));
554
555 case MFM_MCAST:
556 return flow_wildcards_is_dl_dst_mask_valid(mask->mac);
557 }
558
559 NOT_REACHED();
560}
561
562static bool
563is_ip_any(const struct flow *flow)
564{
565 return (flow->dl_type == htons(ETH_TYPE_IP) ||
566 flow->dl_type == htons(ETH_TYPE_IPV6));
567}
568
569static bool
570is_icmpv4(const struct flow *flow)
571{
572 return (flow->dl_type == htons(ETH_TYPE_IP)
573 && flow->nw_proto == IPPROTO_ICMP);
574}
575
576static bool
577is_icmpv6(const struct flow *flow)
578{
579 return (flow->dl_type == htons(ETH_TYPE_IPV6)
580 && flow->nw_proto == IPPROTO_ICMPV6);
581}
582
583/* Returns true if 'flow' meets the prerequisites for 'mf', false otherwise. */
584bool
585mf_are_prereqs_ok(const struct mf_field *mf, const struct flow *flow)
586{
587 switch (mf->prereqs) {
588 case MFP_NONE:
589 return true;
590
591 case MFP_ARP:
592 return flow->dl_type == htons(ETH_TYPE_ARP);
593 case MFP_IPV4:
594 return flow->dl_type == htons(ETH_TYPE_IP);
595 case MFP_IPV6:
596 return flow->dl_type == htons(ETH_TYPE_IPV6);
597 case MFP_IP_ANY:
598 return is_ip_any(flow);
599
600 case MFP_TCP:
601 return is_ip_any(flow) && flow->nw_proto == IPPROTO_TCP;
602 case MFP_UDP:
603 return is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP;
604 case MFP_ICMPV6:
605 return is_icmpv6(flow);
606 case MFP_ICMP_ANY:
607 return is_icmpv4(flow) || is_icmpv6(flow);
608
609 case MFP_ND:
610 return (is_icmpv6(flow)
3ee8a9f0
BP		 611 && flow->tp_dst == htons(0)
612 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
613 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
6a885fd0
BP		 614 case MFP_ND_SOLICIT:
615 return (is_icmpv6(flow)
3ee8a9f0
BP		 616 && flow->tp_dst == htons(0)
617 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)));
6a885fd0
BP		 618 case MFP_ND_ADVERT:
619 return (is_icmpv6(flow)
3ee8a9f0
BP		 620 && flow->tp_dst == htons(0)
621 && (flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
6a885fd0
BP		 622 }
623
624 NOT_REACHED();
625}
626
627/* Returns true if 'value' may be a valid value *as part of a masked match*,
628 * false otherwise.
629 *
630 * A value is not rejected just because it is not valid for the field in
631 * question, but only if it doesn't make sense to test the bits in question at
632 * all. For example, the MFF_VLAN_TCI field will never have a nonzero value
633 * without the VLAN_CFI bit being set, but we can't reject those values because
634 * it is still legitimate to test just for those bits (see the documentation
635 * for NXM_OF_VLAN_TCI in nicira-ext.h). On the other hand, there is never a
636 * reason to set the low bit of MFF_IP_TOS to 1, so we reject that. */
637bool
638mf_is_value_valid(const struct mf_field *mf, const union mf_value *value)
639{
640 switch (mf->id) {
641 case MFF_TUN_ID:
642 case MFF_IN_PORT:
643#if FLOW_N_REGS > 0
644 case MFF_REG0:
645#endif
646#if FLOW_N_REGS > 1
647 case MFF_REG1:
648#endif
649#if FLOW_N_REGS > 2
650 case MFF_REG2:
651#endif
652#if FLOW_N_REGS > 3
653 case MFF_REG3:
654#endif
655#if FLOW_N_REGS > 4
d2c0fed9
JP		 656 case MFF_REG4:
657#endif
658#if FLOW_N_REGS > 5
6a885fd0
BP		 659#error
660#endif
661 case MFF_ETH_SRC:
662 case MFF_ETH_DST:
663 case MFF_ETH_TYPE:
664 case MFF_VLAN_TCI:
665 case MFF_IPV4_SRC:
666 case MFF_IPV4_DST:
667 case MFF_IPV6_SRC:
668 case MFF_IPV6_DST:
669 case MFF_IP_PROTO:
670 case MFF_ARP_SPA:
671 case MFF_ARP_TPA:
672 case MFF_ARP_SHA:
673 case MFF_ARP_THA:
674 case MFF_TCP_SRC:
675 case MFF_TCP_DST:
676 case MFF_UDP_SRC:
677 case MFF_UDP_DST:
678 case MFF_ICMP_TYPE:
679 case MFF_ICMP_CODE:
680 case MFF_ND_TARGET:
681 case MFF_ND_SLL:
682 case MFF_ND_TLL:
683 return true;
684
685 case MFF_IP_TOS:
7257b535
BP		 686 return !(value->u8 & ~IP_DSCP_MASK);
687 case MFF_IP_FRAG:
688 return !(value->u8 & ~FLOW_FRAG_MASK);
6a885fd0
BP		 689
690 case MFF_ARP_OP:
691 return !(value->be16 & htons(0xff00));
692
693 case MFF_VLAN_VID:
694 return !(value->be16 & htons(VLAN_CFI | VLAN_PCP_MASK));
695
696 case MFF_VLAN_PCP:
697 return !(value->u8 & ~7);
698
699 case MFF_N_IDS:
700 default:
701 NOT_REACHED();
702 }
703}
704
705/* Copies the value of field 'mf' from 'flow' into 'value'. The caller is
706 * responsible for ensuring that 'flow' meets 'mf''s prerequisites. */
707void
708mf_get_value(const struct mf_field *mf, const struct flow *flow,
709 union mf_value *value)
710{
711 switch (mf->id) {
712 case MFF_TUN_ID:
713 value->be64 = flow->tun_id;
714 break;
715
716 case MFF_IN_PORT:
717 value->be16 = htons(flow->in_port);
718 break;
719
720#if FLOW_N_REGS > 0
721 case MFF_REG0:
722#endif
723#if FLOW_N_REGS > 1
724 case MFF_REG1:
725#endif
726#if FLOW_N_REGS > 2
727 case MFF_REG2:
728#endif
729#if FLOW_N_REGS > 3
730 case MFF_REG3:
731#endif
732#if FLOW_N_REGS > 4
d2c0fed9
JP		 733 case MFF_REG4:
734#endif
735#if FLOW_N_REGS > 5
6a885fd0
BP		 736#error
737#endif
2f98b0b7 738 value->be32 = htonl(flow->regs[mf->id - MFF_REG0]);
6a885fd0
BP		 739 break;
740
741 case MFF_ETH_SRC:
742 memcpy(value->mac, flow->dl_src, ETH_ADDR_LEN);
743 break;
744
745 case MFF_ETH_DST:
746 memcpy(value->mac, flow->dl_dst, ETH_ADDR_LEN);
747 break;
748
749 case MFF_ETH_TYPE:
750 value->be16 = flow->dl_type;
751 break;
752
753 case MFF_VLAN_TCI:
754 value->be16 = flow->vlan_tci;
755 break;
756
757 case MFF_VLAN_VID:
758 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK);
759 break;
760
761 case MFF_VLAN_PCP:
762 value->u8 = vlan_tci_to_pcp(flow->vlan_tci);
763 break;
764
765 case MFF_IPV4_SRC:
766 value->be32 = flow->nw_src;
767 break;
768
769 case MFF_IPV4_DST:
770 value->be32 = flow->nw_dst;
771 break;
772
773 case MFF_IPV6_SRC:
774 value->ipv6 = flow->ipv6_src;
775 break;
776
777 case MFF_IPV6_DST:
778 value->ipv6 = flow->ipv6_dst;
779 break;
780
781 case MFF_IP_PROTO:
782 value->u8 = flow->nw_proto;
783 break;
784
785 case MFF_IP_TOS:
7257b535
BP		 786 value->u8 = flow->tos_frag & IP_DSCP_MASK;
787 break;
788
789 case MFF_IP_FRAG:
790 value->u8 = flow->tos_frag & FLOW_FRAG_MASK;
6a885fd0
BP		 791 break;
792
793 case MFF_ARP_OP:
794 value->be16 = htons(flow->nw_proto);
795 break;
796
797 case MFF_ARP_SPA:
798 value->be32 = flow->nw_src;
799 break;
800
801 case MFF_ARP_TPA:
802 value->be32 = flow->nw_dst;
803 break;
804
805 case MFF_ARP_SHA:
806 case MFF_ND_SLL:
807 memcpy(value->mac, flow->arp_sha, ETH_ADDR_LEN);
808 break;
809
810 case MFF_ARP_THA:
811 case MFF_ND_TLL:
812 memcpy(value->mac, flow->arp_tha, ETH_ADDR_LEN);
813 break;
814
815 case MFF_TCP_SRC:
816 value->be16 = flow->tp_src;
817 break;
818
819 case MFF_TCP_DST:
820 value->be16 = flow->tp_dst;
821 break;
822
823 case MFF_UDP_SRC:
824 value->be16 = flow->tp_src;
825 break;
826
827 case MFF_UDP_DST:
828 value->be16 = flow->tp_dst;
829 break;
830
831 case MFF_ICMP_TYPE:
832 value->u8 = ntohs(flow->tp_src);
833 break;
834
835 case MFF_ICMP_CODE:
836 value->u8 = ntohs(flow->tp_dst);
837 break;
838
839 case MFF_ND_TARGET:
840 value->ipv6 = flow->nd_target;
841 break;
842
843 case MFF_N_IDS:
844 default:
845 NOT_REACHED();
846 }
847}
848
849/* Makes 'rule' match field 'mf' exactly, with the value matched taken from
850 * 'value'. The caller is responsible for ensuring that 'rule' meets 'mf''s
851 * prerequisites. */
852void
853mf_set_value(const struct mf_field *mf,
854 const union mf_value *value, struct cls_rule *rule)
855{
856 switch (mf->id) {
857 case MFF_TUN_ID:
858 cls_rule_set_tun_id(rule, value->be64);
859 break;
860
861 case MFF_IN_PORT:
862 cls_rule_set_in_port(rule, ntohs(value->be16));
863 break;
864
865#if FLOW_N_REGS > 0
866 case MFF_REG0:
867#endif
868#if FLOW_N_REGS > 1
869 case MFF_REG1:
870#endif
871#if FLOW_N_REGS > 2
872 case MFF_REG2:
873#endif
874#if FLOW_N_REGS > 3
875 case MFF_REG3:
876#endif
877#if FLOW_N_REGS > 4
d2c0fed9
JP		 878 case MFF_REG4:
879#endif
880#if FLOW_N_REGS > 5
6a885fd0
BP		 881#error
882#endif
883#if FLOW_N_REGS > 0
884 cls_rule_set_reg(rule, mf->id - MFF_REG0, ntohl(value->be32));
885 break;
886#endif
887
888 case MFF_ETH_SRC:
889 cls_rule_set_dl_src(rule, value->mac);
890 break;
891
892 case MFF_ETH_DST:
893 cls_rule_set_dl_dst(rule, value->mac);
894 break;
895
896 case MFF_ETH_TYPE:
897 cls_rule_set_dl_type(rule, value->be16);
898 break;
899
900 case MFF_VLAN_TCI:
901 cls_rule_set_dl_tci(rule, value->be16);
902 break;
903
904 case MFF_VLAN_VID:
905 cls_rule_set_dl_vlan(rule, value->be16);
906 break;
907
908 case MFF_VLAN_PCP:
909 cls_rule_set_dl_vlan_pcp(rule, value->u8);
910 break;
911
912 case MFF_IPV4_SRC:
913 cls_rule_set_nw_src(rule, value->be32);
914 break;
915
916 case MFF_IPV4_DST:
917 cls_rule_set_nw_dst(rule, value->be32);
918 break;
919
920 case MFF_IPV6_SRC:
921 cls_rule_set_ipv6_src(rule, &value->ipv6);
922 break;
923
924 case MFF_IPV6_DST:
925 cls_rule_set_ipv6_dst(rule, &value->ipv6);
926 break;
927
928 case MFF_IP_PROTO:
929 cls_rule_set_nw_proto(rule, value->u8);
930 break;
931
932 case MFF_IP_TOS:
933 cls_rule_set_nw_tos(rule, value->u8);
934 break;
935
7257b535
BP		 936 case MFF_IP_FRAG:
937 cls_rule_set_frag(rule, value->u8);
938 break;
939
6a885fd0
BP		 940 case MFF_ARP_OP:
941 cls_rule_set_nw_proto(rule, ntohs(value->be16));
942 break;
943
944 case MFF_ARP_SPA:
945 cls_rule_set_nw_src(rule, value->be32);
946 break;
947
948 case MFF_ARP_TPA:
949 cls_rule_set_nw_dst(rule, value->be32);
950 break;
951
952 case MFF_ARP_SHA:
953 case MFF_ND_SLL:
954 cls_rule_set_arp_sha(rule, value->mac);
955 break;
956
957 case MFF_ARP_THA:
958 case MFF_ND_TLL:
959 cls_rule_set_arp_tha(rule, value->mac);
960 break;
961
962 case MFF_TCP_SRC:
963 cls_rule_set_tp_src(rule, value->be16);
964 break;
965
966 case MFF_TCP_DST:
967 cls_rule_set_tp_dst(rule, value->be16);
968 break;
969
970 case MFF_UDP_SRC:
971 cls_rule_set_tp_src(rule, value->be16);
972 break;
973
974 case MFF_UDP_DST:
975 cls_rule_set_tp_dst(rule, value->be16);
976 break;
977
978 case MFF_ICMP_TYPE:
979 cls_rule_set_icmp_type(rule, value->u8);
980 break;
981
982 case MFF_ICMP_CODE:
983 cls_rule_set_icmp_code(rule, value->u8);
984 break;
985
986 case MFF_ND_TARGET:
987 cls_rule_set_nd_target(rule, &value->ipv6);
988 break;
989
990 case MFF_N_IDS:
991 default:
992 NOT_REACHED();
993 }
994}
995
996/* Makes 'rule' wildcard field 'mf'.
997 *
998 * The caller is responsible for ensuring that 'rule' meets 'mf''s
999 * prerequisites. */
1000void
1001mf_set_wild(const struct mf_field *mf, struct cls_rule *rule)
1002{
1003 switch (mf->id) {
1004 case MFF_TUN_ID:
1005 cls_rule_set_tun_id_masked(rule, htonll(0), htonll(0));
1006 break;
1007
1008 case MFF_IN_PORT:
1009 rule->wc.wildcards |= FWW_IN_PORT;
1010 rule->flow.in_port = 0;
1011 break;
1012
1013#if FLOW_N_REGS > 0
1014 case MFF_REG0:
1015 cls_rule_set_reg_masked(rule, 0, 0, 0);
1016 break;
1017#endif
1018#if FLOW_N_REGS > 1
1019 case MFF_REG1:
1020 cls_rule_set_reg_masked(rule, 1, 0, 0);
1021 break;
1022#endif
1023#if FLOW_N_REGS > 2
1024 case MFF_REG2:
1025 cls_rule_set_reg_masked(rule, 2, 0, 0);
1026 break;
1027#endif
1028#if FLOW_N_REGS > 3
1029 case MFF_REG3:
1030 cls_rule_set_reg_masked(rule, 3, 0, 0);
1031 break;
1032#endif
1033#if FLOW_N_REGS > 4
d2c0fed9
JP		 1034 case MFF_REG4:
1035 cls_rule_set_reg_masked(rule, 4, 0, 0);
1036 break;
1037#endif
1038#if FLOW_N_REGS > 5
6a885fd0
BP		 1039#error
1040#endif
1041
1042 case MFF_ETH_SRC:
1043 rule->wc.wildcards |= FWW_DL_SRC;
1044 memset(rule->flow.dl_src, 0, sizeof rule->flow.dl_src);
1045 break;
1046
1047 case MFF_ETH_DST:
1048 rule->wc.wildcards |= FWW_DL_DST | FWW_ETH_MCAST;
1049 memset(rule->flow.dl_dst, 0, sizeof rule->flow.dl_dst);
1050 break;
1051
1052 case MFF_ETH_TYPE:
1053 rule->wc.wildcards |= FWW_DL_TYPE;
1054 rule->flow.dl_type = htons(0);
1055 break;
1056
1057 case MFF_VLAN_TCI:
1058 cls_rule_set_dl_tci_masked(rule, htons(0), htons(0));
1059 break;
1060
1061 case MFF_VLAN_VID:
1062 cls_rule_set_any_vid(rule);
1063 break;
1064
1065 case MFF_VLAN_PCP:
1066 cls_rule_set_any_pcp(rule);
1067 break;
1068
1069 case MFF_IPV4_SRC:
1070 case MFF_ARP_SPA:
1071 cls_rule_set_nw_src_masked(rule, htonl(0), htonl(0));
1072 break;
1073
1074 case MFF_IPV4_DST:
1075 case MFF_ARP_TPA:
1076 cls_rule_set_nw_dst_masked(rule, htonl(0), htonl(0));
1077 break;
1078
1079 case MFF_IPV6_SRC:
1080 memset(&rule->wc.ipv6_src_mask, 0, sizeof rule->wc.ipv6_src_mask);
1081 memset(&rule->flow.ipv6_src, 0, sizeof rule->flow.ipv6_src);
1082 break;
1083
1084 case MFF_IPV6_DST:
1085 memset(&rule->wc.ipv6_dst_mask, 0, sizeof rule->wc.ipv6_dst_mask);
1086 memset(&rule->flow.ipv6_dst, 0, sizeof rule->flow.ipv6_dst);
1087 break;
1088
1089 case MFF_IP_PROTO:
1090 rule->wc.wildcards |= FWW_NW_PROTO;
1091 rule->flow.nw_proto = 0;
1092 break;
1093
1094 case MFF_IP_TOS:
7257b535
BP		 1095 rule->wc.tos_frag_mask |= IP_DSCP_MASK;
1096 rule->flow.tos_frag &= ~IP_DSCP_MASK;
1097 break;
1098
1099 case MFF_IP_FRAG:
1100 rule->wc.tos_frag_mask |= FLOW_FRAG_MASK;
1101 rule->flow.tos_frag &= ~FLOW_FRAG_MASK;
6a885fd0
BP		 1102 break;
1103
1104 case MFF_ARP_OP:
1105 rule->wc.wildcards |= FWW_NW_PROTO;
1106 rule->flow.nw_proto = 0;
1107 break;
1108
1109 case MFF_ARP_SHA:
1110 case MFF_ND_SLL:
1111 rule->wc.wildcards |= FWW_ARP_SHA;
1112 memset(rule->flow.arp_sha, 0, sizeof rule->flow.arp_sha);
1113 break;
1114
1115 case MFF_ARP_THA:
1116 case MFF_ND_TLL:
1117 rule->wc.wildcards |= FWW_ARP_THA;
1118 memset(rule->flow.arp_tha, 0, sizeof rule->flow.arp_tha);
1119 break;
1120
1121 case MFF_TCP_SRC:
1122 case MFF_UDP_SRC:
1123 case MFF_ICMP_TYPE:
1124 rule->wc.wildcards |= FWW_TP_SRC;
1125 rule->flow.tp_src = htons(0);
1126 break;
1127
1128 case MFF_TCP_DST:
1129 case MFF_UDP_DST:
1130 case MFF_ICMP_CODE:
1131 rule->wc.wildcards |= FWW_TP_DST;
1132 rule->flow.tp_dst = htons(0);
1133 break;
1134
1135 case MFF_ND_TARGET:
1136 rule->wc.wildcards |= FWW_ND_TARGET;
1137 memset(&rule->flow.nd_target, 0, sizeof rule->flow.nd_target);
1138 break;
1139
1140 case MFF_N_IDS:
1141 default:
1142 NOT_REACHED();
1143 }
1144}
1145
1146/* Makes 'rule' match field 'mf' with the specified 'value' and 'mask'.
1147 * 'value' specifies a value to match and 'mask' specifies a wildcard pattern,
1148 * with a 1-bit indicating that the corresponding value bit must match and a
1149 * 0-bit indicating a don't-care.
1150 *
1151 * If 'mask' is NULL or points to all-1-bits, then this call is equivalent to
1152 * mf_set_value(mf, value, rule). If 'mask' points to all-0-bits, then this
1153 * call is equivalent to mf_set_wild(mf, rule).
1154 *
1155 * 'mask' must be a valid mask for 'mf' (see mf_is_mask_valid()). The caller
1156 * is responsible for ensuring that 'rule' meets 'mf''s prerequisites. */
1157void
1158mf_set(const struct mf_field *mf,
1159 const union mf_value *value, const union mf_value *mask,
1160 struct cls_rule *rule)
1161{
1162 if (!mask || is_all_ones((const uint8_t *) mask, mf->n_bytes)) {
1163 mf_set_value(mf, value, rule);
1164 return;
1165 } else if (is_all_zeros((const uint8_t *) mask, mf->n_bytes)) {
1166 mf_set_wild(mf, rule);
1167 return;
1168 }
1169
1170 switch (mf->id) {
1171 case MFF_IN_PORT:
1172 case MFF_ETH_SRC:
1173 case MFF_ETH_TYPE:
1174 case MFF_VLAN_VID:
1175 case MFF_VLAN_PCP:
1176 case MFF_IP_PROTO:
1177 case MFF_IP_TOS:
1178 case MFF_ARP_OP:
1179 case MFF_ARP_SHA:
1180 case MFF_ARP_THA:
1181 case MFF_TCP_SRC:
1182 case MFF_TCP_DST:
1183 case MFF_UDP_SRC:
1184 case MFF_UDP_DST:
1185 case MFF_ICMP_TYPE:
1186 case MFF_ICMP_CODE:
1187 case MFF_ND_TARGET:
1188 case MFF_ND_SLL:
1189 case MFF_ND_TLL:
1190 NOT_REACHED();
1191
1192 case MFF_TUN_ID:
1193 cls_rule_set_tun_id_masked(rule, value->be64, mask->be64);
1194 break;
1195
1196#if FLOW_N_REGS > 0
1197 case MFF_REG0:
1198#endif
1199#if FLOW_N_REGS > 1
1200 case MFF_REG1:
1201#endif
1202#if FLOW_N_REGS > 2
1203 case MFF_REG2:
1204#endif
1205#if FLOW_N_REGS > 3
1206 case MFF_REG3:
1207#endif
1208#if FLOW_N_REGS > 4
d2c0fed9
JP		 1209 case MFF_REG4:
1210#endif
1211#if FLOW_N_REGS > 5
6a885fd0
BP		 1212#error
1213#endif
1214 cls_rule_set_reg_masked(rule, mf->id - MFF_REG0,
1215 ntohl(value->be32), ntohl(mask->be32));
1216 break;
1217
1218 case MFF_ETH_DST:
1219 if (flow_wildcards_is_dl_dst_mask_valid(mask->mac)) {
1220 cls_rule_set_dl_dst_masked(rule, value->mac, mask->mac);
1221 }
1222 break;
1223
1224 case MFF_VLAN_TCI:
1225 cls_rule_set_dl_tci_masked(rule, value->be16, mask->be16);
1226 break;
1227
1228 case MFF_IPV4_SRC:
1229 cls_rule_set_nw_src_masked(rule, value->be32, mask->be32);
1230 break;
1231
1232 case MFF_IPV4_DST:
1233 cls_rule_set_nw_dst_masked(rule, value->be32, mask->be32);
1234 break;
1235
1236 case MFF_IPV6_SRC:
1237 cls_rule_set_ipv6_src_masked(rule, &value->ipv6, &mask->ipv6);
1238 break;
1239
1240 case MFF_IPV6_DST:
1241 cls_rule_set_ipv6_dst_masked(rule, &value->ipv6, &mask->ipv6);
1242 break;
1243
7257b535
BP		 1244 case MFF_IP_FRAG:
1245 cls_rule_set_frag_masked(rule, value->u8, mask->u8);
1246 break;
1247
6a885fd0
BP		 1248 case MFF_ARP_SPA:
1249 cls_rule_set_nw_src_masked(rule, value->be32, mask->be32);
1250 break;
1251
1252 case MFF_ARP_TPA:
1253 cls_rule_set_nw_dst_masked(rule, value->be32, mask->be32);
1254 break;
1255
1256 case MFF_N_IDS:
1257 default:
1258 NOT_REACHED();
1259 }
1260}
1261
1262/* Makes a subfield starting at bit offset 'ofs' and continuing for 'n_bits' in
1263 * 'rule''s field 'mf' exactly match the 'n_bits' least-significant bits of
1264 * 'x'.
1265 *
1266 * Example: suppose that 'mf' is originally the following 2-byte field in
1267 * 'rule':
1268 *
1269 * value == 0xe00a == 2#1110000000001010
1270 * mask == 0xfc3f == 2#1111110000111111
1271 *
1272 * The call mf_set_subfield(mf, 0x55, 8, 7, rule) would have the following
1273 * effect (note that 0x55 is 2#1010101):
1274 *
1275 * value == 0xd50a == 2#1101010100001010
1276 * mask == 0xff3f == 2#1111111100111111
1277 *
1278 * The caller is responsible for ensuring that the result will be a valid
1279 * wildcard pattern for 'mf'. The caller is responsible for ensuring that
1280 * 'rule' meets 'mf''s prerequisites. */
1281void
1282mf_set_subfield(const struct mf_field *mf, uint64_t x, unsigned int ofs,
1283 unsigned int n_bits, struct cls_rule *rule)
1284{
1285 if (ofs == 0 && mf->n_bytes * 8 == n_bits) {
1286 union mf_value value;
1287 int i;
1288
1289 for (i = mf->n_bytes - 1; i >= 0; i--) {
1290 ((uint8_t *) &value)[i] = x;
1291 x >>= 8;
1292 }
1293 mf_set_value(mf, &value, rule);
1294 } else {
1295 union mf_value value, mask;
1296 uint8_t *vp, *mp;
1297 unsigned int byte_ofs;
1298
1299 mf_get(mf, rule, &value, &mask);
1300
1301 byte_ofs = mf->n_bytes - ofs / 8;
1302 vp = &((uint8_t *) &value)[byte_ofs];
1303 mp = &((uint8_t *) &mask)[byte_ofs];
1304 if (ofs % 8) {
1305 unsigned int chunk = MIN(8 - ofs % 8, n_bits);
1306 uint8_t chunk_mask = ((1 << chunk) - 1) << (ofs % 8);
1307
1308 *--vp &= ~chunk_mask;
1309 *vp |= chunk_mask & (x << (ofs % 8));
1310 *--mp |= chunk_mask;
1311
1312 x >>= chunk;
1313 n_bits -= chunk;
1314 ofs += chunk;
1315 }
1316 while (n_bits >= 8) {
1317 *--vp = x;
1318 *--mp = 0xff;
1319 x >>= 8;
1320 n_bits -= 8;
1321 ofs += 8;
1322 }
1323 if (n_bits) {
1324 uint8_t chunk_mask = (1 << n_bits) - 1;
1325
1326 *--vp &= ~chunk_mask;
1327 *vp |= chunk_mask & x;
1328 *--mp |= chunk_mask;
1329 }
1330
1331 mf_set(mf, &value, &mask, rule);
1332 }
1333}
1334
1335/* Copies the value and wildcard bit pattern for 'mf' from 'rule' into the
1336 * 'value' and 'mask', respectively. */
1337void
1338mf_get(const struct mf_field *mf, const struct cls_rule *rule,
1339 union mf_value *value, union mf_value *mask)
1340{
1341 mf_get_value(mf, &rule->flow, value);
1342 mf_get_mask(mf, &rule->wc, mask);
1343}
1344
1345/* Assigns a random value for field 'mf' to 'value'. */
1346void
1347mf_random_value(const struct mf_field *mf, union mf_value *value)
1348{
1349 random_bytes(value, mf->n_bytes);
1350
1351 switch (mf->id) {
1352 case MFF_TUN_ID:
1353 case MFF_IN_PORT:
1354#if FLOW_N_REGS > 0
1355 case MFF_REG0:
1356#endif
1357#if FLOW_N_REGS > 1
1358 case MFF_REG1:
1359#endif
1360#if FLOW_N_REGS > 2
1361 case MFF_REG2:
1362#endif
1363#if FLOW_N_REGS > 3
1364 case MFF_REG3:
1365#endif
1366#if FLOW_N_REGS > 4
d2c0fed9
JP		 1367 case MFF_REG4:
1368#endif
1369#if FLOW_N_REGS > 5
6a885fd0
BP		 1370#error
1371#endif
1372 case MFF_ETH_SRC:
1373 case MFF_ETH_DST:
1374 case MFF_ETH_TYPE:
1375 case MFF_VLAN_TCI:
1376 case MFF_IPV4_SRC:
1377 case MFF_IPV4_DST:
1378 case MFF_IPV6_SRC:
1379 case MFF_IPV6_DST:
1380 case MFF_IP_PROTO:
1381 case MFF_ARP_SPA:
1382 case MFF_ARP_TPA:
1383 case MFF_ARP_SHA:
1384 case MFF_ARP_THA:
1385 case MFF_TCP_SRC:
1386 case MFF_TCP_DST:
1387 case MFF_UDP_SRC:
1388 case MFF_UDP_DST:
1389 case MFF_ICMP_TYPE:
1390 case MFF_ICMP_CODE:
1391 case MFF_ND_TARGET:
1392 case MFF_ND_SLL:
1393 case MFF_ND_TLL:
1394 break;
1395
1396 case MFF_IP_TOS:
1397 value->u8 &= ~0x03;
1398 break;
1399
7257b535
BP		 1400 case MFF_IP_FRAG:
1401 value->u8 &= FLOW_FRAG_MASK;
1402 break;
1403
6a885fd0
BP		 1404 case MFF_ARP_OP:
1405 value->be16 &= htons(0xff);
1406 break;
1407
1408 case MFF_VLAN_VID:
1409 value->be16 &= htons(VLAN_VID_MASK);
1410 break;
1411
1412 case MFF_VLAN_PCP:
1413 value->u8 &= 0x07;
1414 break;
1415
1416 case MFF_N_IDS:
1417 default:
1418 NOT_REACHED();
1419 }
1420}
1421
1422static char *
1423mf_from_integer_string(const struct mf_field *mf, const char *s,
1424 uint8_t *valuep, uint8_t *maskp)
1425{
1426 unsigned long long int integer, mask;
1427 char *tail;
1428 int i;
1429
1430 errno = 0;
1431 integer = strtoull(s, &tail, 0);
1432 if (errno || (*tail != '\0' && *tail != '/')) {
1433 goto syntax_error;
1434 }
1435
1436 if (*tail == '/') {
1437 mask = strtoull(tail + 1, &tail, 0);
1438 if (errno || *tail != '\0') {
1439 goto syntax_error;
1440 }
1441 } else {
1442 mask = ULLONG_MAX;
1443 }
1444
1445 for (i = mf->n_bytes - 1; i >= 0; i--) {
1446 valuep[i] = integer;
1447 maskp[i] = mask;
1448 integer >>= 8;
1449 mask >>= 8;
1450 }
1451 if (integer) {
1452 return xasprintf("%s: value too large for %u-byte field %s",
1453 s, mf->n_bytes, mf->name);
1454 }
1455 return NULL;
1456
1457syntax_error:
1458 return xasprintf("%s: bad syntax for %s", s, mf->name);
1459}
1460
1461static char *
1462mf_from_ethernet_string(const struct mf_field *mf, const char *s,
1463 uint8_t mac[ETH_ADDR_LEN],
1464 uint8_t mask[ETH_ADDR_LEN])
1465{
1466 assert(mf->n_bytes == ETH_ADDR_LEN);
1467
1468 switch (sscanf(s, ETH_ADDR_SCAN_FMT"/"ETH_ADDR_SCAN_FMT,
1469 ETH_ADDR_SCAN_ARGS(mac), ETH_ADDR_SCAN_ARGS(mask))){
1470 case ETH_ADDR_SCAN_COUNT * 2:
1471 return NULL;
1472
1473 case ETH_ADDR_SCAN_COUNT:
1474 memset(mask, 0xff, ETH_ADDR_LEN);
1475 return NULL;
1476
1477 default:
1478 return xasprintf("%s: invalid Ethernet address", s);
1479 }
1480}
1481
1482static char *
1483mf_from_ipv4_string(const struct mf_field *mf, const char *s,
1484 ovs_be32 *ip, ovs_be32 *mask)
1485{
1486 int prefix;
1487
1488 assert(mf->n_bytes == sizeof *ip);
1489
1490 if (sscanf(s, IP_SCAN_FMT"/"IP_SCAN_FMT,
1491 IP_SCAN_ARGS(ip), IP_SCAN_ARGS(mask)) == IP_SCAN_COUNT * 2) {
1492 /* OK. */
1493 } else if (sscanf(s, IP_SCAN_FMT"/%d",
1494 IP_SCAN_ARGS(ip), &prefix) == IP_SCAN_COUNT + 1) {
1495 if (prefix <= 0 || prefix > 32) {
1496 return xasprintf("%s: network prefix bits not between 1 and "
1497 "32", s);
1498 } else if (prefix == 32) {
1499 *mask = htonl(UINT32_MAX);
1500 } else {
1501 *mask = htonl(((1u << prefix) - 1) << (32 - prefix));
1502 }
1503 } else if (sscanf(s, IP_SCAN_FMT, IP_SCAN_ARGS(ip)) == IP_SCAN_COUNT) {
1504 *mask = htonl(UINT32_MAX);
1505 } else {
1506 return xasprintf("%s: invalid IP address", s);
1507 }
1508 return NULL;
1509}
1510
1511static char *
1512mf_from_ipv6_string(const struct mf_field *mf, const char *s,
1513 struct in6_addr *value, struct in6_addr *mask)
1514{
1515 char *str = xstrdup(s);
1516 char *save_ptr = NULL;
1517 const char *name, *netmask;
1518 int retval;
1519
1520 assert(mf->n_bytes == sizeof *value);
1521
1522 name = strtok_r(str, "/", &save_ptr);
1523 retval = name ? lookup_ipv6(name, value) : EINVAL;
1524 if (retval) {
1525 char *err;
1526
1527 err = xasprintf("%s: could not convert to IPv6 address", str);
1528 free(str);
1529
1530 return err;
1531 }
1532
1533 netmask = strtok_r(NULL, "/", &save_ptr);
1534 if (netmask) {
1535 int prefix = atoi(netmask);
1536 if (prefix <= 0 || prefix > 128) {
1537 free(str);
1538 return xasprintf("%s: prefix bits not between 1 and 128", s);
1539 } else {
1540 *mask = ipv6_create_mask(prefix);
1541 }
1542 } else {
1543 *mask = in6addr_exact;
1544 }
1545 free(str);
1546
1547 return NULL;
1548}
1549
1550static char *
1551mf_from_ofp_port_string(const struct mf_field *mf, const char *s,
1552 ovs_be16 *valuep, ovs_be16 *maskp)
1553{
1554 uint16_t port;
1555
1556 assert(mf->n_bytes == sizeof(ovs_be16));
1557 if (ofputil_port_from_string(s, &port)) {
1558 *valuep = htons(port);
1559 *maskp = htons(UINT16_MAX);
1560 return NULL;
1561 } else {
1562 return mf_from_integer_string(mf, s,
1563 (uint8_t *) valuep, (uint8_t *) maskp);
1564 }
1565}
1566
7257b535
BP		 1567struct frag_handling {
1568 const char *name;
1569 uint8_t mask;
1570 uint8_t value;
1571};
1572
1573static const struct frag_handling all_frags[] = {
1574#define A FLOW_FRAG_ANY
1575#define L FLOW_FRAG_LATER
1576 /* name mask value */
1577
1578 { "no", A|L, 0 },
1579 { "first", A|L, A },
1580 { "later", A|L, A|L },
1581
1582 { "no", A, 0 },
1583 { "yes", A, A },
1584
1585 { "not_later", L, 0 },
1586 { "later", L, L },
1587#undef A
1588#undef L
1589};
1590
1591static char *
1592mf_from_frag_string(const char *s, uint8_t *valuep, uint8_t *maskp)
1593{
1594 const struct frag_handling *h;
1595
1596 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
1597 if (!strcasecmp(s, h->name)) {
1598 /* We force the upper bits of the mask on to make mf_parse_value()
1599 * happy (otherwise it will never think it's an exact match.) */
1600 *maskp = h->mask | ~FLOW_FRAG_MASK;
1601 *valuep = h->value;
1602 return NULL;
1603 }
1604 }
1605
1606 return xasprintf("%s: unknown fragment type (valid types are \"no\", "
1607 "\"yes\", \"first\", \"later\", \"not_first\"", s);
1608}
1609
6a885fd0
BP		 1610/* Parses 's', a string value for field 'mf', into 'value' and 'mask'. Returns
1611 * NULL if successful, otherwise a malloc()'d string describing the error. */
1612char *
1613mf_parse(const struct mf_field *mf, const char *s,
1614 union mf_value *value, union mf_value *mask)
1615{
1616 if (!strcasecmp(s, "any") || !strcmp(s, "*")) {
1617 memset(value, 0, mf->n_bytes);
1618 memset(mask, 0, mf->n_bytes);
1619 return NULL;
1620 }
1621
1622 switch (mf->string) {
1623 case MFS_DECIMAL:
1624 case MFS_HEXADECIMAL:
1625 return mf_from_integer_string(mf, s,
1626 (uint8_t *) value, (uint8_t *) mask);
1627
1628 case MFS_ETHERNET:
1629 return mf_from_ethernet_string(mf, s, value->mac, mask->mac);
1630
1631 case MFS_IPV4:
1632 return mf_from_ipv4_string(mf, s, &value->be32, &mask->be32);
1633
1634 case MFS_IPV6:
1635 return mf_from_ipv6_string(mf, s, &value->ipv6, &mask->ipv6);
1636
1637 case MFS_OFP_PORT:
1638 return mf_from_ofp_port_string(mf, s, &value->be16, &mask->be16);
7257b535
BP		 1639
1640 case MFS_FRAG:
1641 return mf_from_frag_string(s, &value->u8, &mask->u8);
6a885fd0
BP		 1642 }
1643 NOT_REACHED();
1644}
1645
1646/* Parses 's', a string value for field 'mf', into 'value'. Returns NULL if
1647 * successful, otherwise a malloc()'d string describing the error. */
1648char *
1649mf_parse_value(const struct mf_field *mf, const char *s, union mf_value *value)
1650{
1651 union mf_value mask;
1652 char *error;
1653
1654 error = mf_parse(mf, s, value, &mask);
1655 if (error) {
1656 return error;
1657 }
1658
1659 if (!is_all_ones((const uint8_t *) &mask, mf->n_bytes)) {
1660 return xasprintf("%s: wildcards not allowed here", s);
1661 }
1662 return NULL;
1663}
1664
1665static void
1666mf_format_integer_string(const struct mf_field *mf, const uint8_t *valuep,
1667 const uint8_t *maskp, struct ds *s)
1668{
1669 unsigned long long int integer;
1670 int i;
1671
1672 assert(mf->n_bytes <= 8);
1673
1674 integer = 0;
1675 for (i = 0; i < mf->n_bytes; i++) {
1676 integer = (integer << 8) | valuep[i];
1677 }
1678 if (mf->string == MFS_HEXADECIMAL) {
1679 ds_put_format(s, "%#llx", integer);
1680 } else {
1681 ds_put_format(s, "%lld", integer);
1682 }
1683
1684 if (maskp) {
1685 unsigned long long int mask;
1686
1687 mask = 0;
1688 for (i = 0; i < mf->n_bytes; i++) {
1689 mask = (mask << 8) | maskp[i];
1690 }
1691
1692 /* I guess we could write the mask in decimal for MFS_DECIMAL but I'm
1693 * not sure that that a bit-mask written in decimal is ever easier to
1694 * understand than the same bit-mask written in hexadecimal. */
1695 ds_put_format(s, "/%#llx", mask);
1696 }
1697}
1698
7257b535
BP		 1699static void
1700mf_format_frag_string(const uint8_t *valuep, const uint8_t *maskp,
1701 struct ds *s)
1702{
1703 const struct frag_handling *h;
1704 uint8_t value = *valuep;
1705 uint8_t mask = *maskp;
1706
1707 value &= mask;
1708 mask &= FLOW_FRAG_MASK;
1709
1710 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
1711 if (value == h->value && mask == h->mask) {
1712 ds_put_cstr(s, h->name);
1713 return;
1714 }
1715 }
1716 ds_put_cstr(s, "<error>");
1717}
1718
6a885fd0
BP		 1719/* Appends to 's' a string representation of field 'mf' whose value is in
1720 * 'value' and 'mask'. 'mask' may be NULL to indicate an exact match. */
1721void
1722mf_format(const struct mf_field *mf,
1723 const union mf_value *value, const union mf_value *mask,
1724 struct ds *s)
1725{
1726 if (mask) {
1727 if (is_all_zeros((const uint8_t *) mask, mf->n_bytes)) {
1728 ds_put_cstr(s, "ANY");
1729 return;
1730 } else if (is_all_ones((const uint8_t *) mask, mf->n_bytes)) {
1731 mask = NULL;
1732 }
1733 }
1734
1735 switch (mf->string) {
1736 case MFS_OFP_PORT:
1737 if (!mask) {
1738 ofputil_format_port(ntohs(value->be16), s);
1739 break;
1740 }
1741 /* fall through */
1742 case MFS_DECIMAL:
1743 case MFS_HEXADECIMAL:
1744 mf_format_integer_string(mf, (uint8_t *) value, (uint8_t *) mask, s);
1745 break;
1746
1747 case MFS_ETHERNET:
1748 ds_put_format(s, ETH_ADDR_FMT, ETH_ADDR_ARGS(value->mac));
1749 if (mask) {
1750 ds_put_format(s, "/"ETH_ADDR_FMT, ETH_ADDR_ARGS(mask->mac));
1751 }
1752 break;
1753
1754 case MFS_IPV4:
1755 ip_format_masked(value->be32, mask ? mask->be32 : htonl(UINT32_MAX),
1756 s);
1757 break;
1758
1759 case MFS_IPV6:
1760 print_ipv6_masked(s, &value->ipv6, mask ? &mask->ipv6 : NULL);
1761 break;
1762
7257b535
BP		 1763 case MFS_FRAG:
1764 mf_format_frag_string(&value->u8, &mask->u8, s);
1765 break;
1766
6a885fd0
BP		 1767 default:
1768 NOT_REACHED();
1769 }
1770}
openvswitch packages for PVE