2 * Copyright (c) 2010, 2011, 2012 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
21 #include <netinet/icmp6.h>
23 #include "classifier.h"
24 #include "dynamic-string.h"
25 #include "meta-flow.h"
26 #include "ofp-actions.h"
27 #include "ofp-errors.h"
30 #include "openflow/nicira-ext.h"
32 #include "unaligned.h"
36 VLOG_DEFINE_THIS_MODULE(nx_match);
38 /* Rate limit for nx_match parse errors. These always indicate a bug in the
39 * peer and so there's not much point in showing a lot of them. */
40 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
42 /* Returns the width of the data for a field with the given 'header', in
45 nxm_field_bytes(uint32_t header)
47 unsigned int length = NXM_LENGTH(header);
48 return NXM_HASMASK(header) ? length / 2 : length;
51 /* Returns the width of the data for a field with the given 'header', in
54 nxm_field_bits(uint32_t header)
56 return nxm_field_bytes(header) * 8;
59 /* nx_pull_match() and helpers. */
62 nx_entry_ok(const void *p, unsigned int match_len)
64 unsigned int payload_len;
70 VLOG_DBG_RL(&rl, "nx_match ends with partial nxm_header");
74 memcpy(&header_be, p, 4);
75 header = ntohl(header_be);
77 payload_len = NXM_LENGTH(header);
79 VLOG_DBG_RL(&rl, "nxm_entry %08"PRIx32" has invalid payload "
83 if (match_len < payload_len + 4) {
84 VLOG_DBG_RL(&rl, "%"PRIu32"-byte nxm_entry but only "
85 "%u bytes left in nx_match", payload_len + 4, match_len);
93 nx_pull_match__(struct ofpbuf *b, unsigned int match_len, bool strict,
94 uint16_t priority, struct cls_rule *rule,
95 ovs_be64 *cookie, ovs_be64 *cookie_mask)
100 assert((cookie != NULL) == (cookie_mask != NULL));
102 p = ofpbuf_try_pull(b, ROUND_UP(match_len, 8));
104 VLOG_DBG_RL(&rl, "nx_match length %u, rounded up to a "
105 "multiple of 8, is longer than space in message (max "
106 "length %zu)", match_len, b->size);
107 return OFPERR_OFPBMC_BAD_LEN;
110 cls_rule_init_catchall(rule, priority);
112 *cookie = *cookie_mask = htonll(0);
115 (header = nx_entry_ok(p, match_len)) != 0;
116 p += 4 + NXM_LENGTH(header), match_len -= 4 + NXM_LENGTH(header)) {
117 const struct mf_field *mf;
120 mf = mf_from_nxm_header(header);
123 error = OFPERR_OFPBMC_BAD_FIELD;
127 } else if (!mf_are_prereqs_ok(mf, &rule->flow)) {
128 error = OFPERR_OFPBMC_BAD_PREREQ;
129 } else if (!mf_is_all_wild(mf, &rule->wc)) {
130 error = OFPERR_OFPBMC_DUP_FIELD;
131 } else if (header != OXM_OF_IN_PORT) {
132 unsigned int width = mf->n_bytes;
133 union mf_value value;
135 memcpy(&value, p + 4, width);
136 if (!mf_is_value_valid(mf, &value)) {
137 error = OFPERR_OFPBMC_BAD_VALUE;
138 } else if (!NXM_HASMASK(header)) {
140 mf_set_value(mf, &value, rule);
144 memcpy(&mask, p + 4 + width, width);
145 if (!mf_is_mask_valid(mf, &mask)) {
146 error = OFPERR_OFPBMC_BAD_MASK;
149 mf_set(mf, &value, &mask, rule);
153 /* Special case for 32bit ports when using OXM,
154 * ports are 16 bits wide otherwise. */
158 memcpy(&port_of11, p + 4, sizeof port_of11);
159 error = ofputil_port_from_ofp11(port_of11, &port);
161 cls_rule_set_in_port(rule, port);
165 /* Check if the match is for a cookie rather than a classifier rule. */
166 if ((header == NXM_NX_COOKIE || header == NXM_NX_COOKIE_W) && cookie) {
168 error = OFPERR_OFPBMC_DUP_FIELD;
170 unsigned int width = sizeof *cookie;
172 memcpy(cookie, p + 4, width);
173 if (NXM_HASMASK(header)) {
174 memcpy(cookie_mask, p + 4 + width, width);
176 *cookie_mask = htonll(UINT64_MAX);
183 VLOG_DBG_RL(&rl, "bad nxm_entry %#08"PRIx32" (vendor=%"PRIu32", "
184 "field=%"PRIu32", hasmask=%"PRIu32", len=%"PRIu32"), "
186 NXM_VENDOR(header), NXM_FIELD(header),
187 NXM_HASMASK(header), NXM_LENGTH(header),
188 ofperr_to_string(error));
193 return match_len ? OFPERR_OFPBMC_BAD_LEN : 0;
196 /* Parses the nx_match formatted match description in 'b' with length
197 * 'match_len'. The results are stored in 'rule', which is initialized with
198 * 'priority'. If 'cookie' and 'cookie_mask' contain valid pointers, then the
199 * cookie and mask will be stored in them if a "NXM_NX_COOKIE*" match is
200 * defined. Otherwise, 0 is stored in both.
202 * Fails with an error when encountering unknown NXM headers.
204 * Returns 0 if successful, otherwise an OpenFlow error code. */
206 nx_pull_match(struct ofpbuf *b, unsigned int match_len,
207 uint16_t priority, struct cls_rule *rule,
208 ovs_be64 *cookie, ovs_be64 *cookie_mask)
210 return nx_pull_match__(b, match_len, true, priority, rule, cookie,
214 /* Behaves the same as nx_pull_match() with one exception. Skips over unknown
215 * NXM headers instead of failing with an error when they are encountered. */
217 nx_pull_match_loose(struct ofpbuf *b, unsigned int match_len,
218 uint16_t priority, struct cls_rule *rule,
219 ovs_be64 *cookie, ovs_be64 *cookie_mask)
221 return nx_pull_match__(b, match_len, false, priority, rule, cookie,
225 /* nx_put_match() and helpers.
227 * 'put' functions whose names end in 'w' add a wildcarded field.
228 * 'put' functions whose names end in 'm' add a field that might be wildcarded.
229 * Other 'put' functions add exact-match fields.
233 nxm_put_header(struct ofpbuf *b, uint32_t header)
235 ovs_be32 n_header = htonl(header);
236 ofpbuf_put(b, &n_header, sizeof n_header);
240 nxm_put_8(struct ofpbuf *b, uint32_t header, uint8_t value)
242 nxm_put_header(b, header);
243 ofpbuf_put(b, &value, sizeof value);
247 nxm_put_8m(struct ofpbuf *b, uint32_t header, uint8_t value, uint8_t mask)
254 nxm_put_8(b, header, value);
258 nxm_put_header(b, NXM_MAKE_WILD_HEADER(header));
259 ofpbuf_put(b, &value, sizeof value);
260 ofpbuf_put(b, &mask, sizeof mask);
265 nxm_put_16(struct ofpbuf *b, uint32_t header, ovs_be16 value)
267 nxm_put_header(b, header);
268 ofpbuf_put(b, &value, sizeof value);
272 nxm_put_16w(struct ofpbuf *b, uint32_t header, ovs_be16 value, ovs_be16 mask)
274 nxm_put_header(b, header);
275 ofpbuf_put(b, &value, sizeof value);
276 ofpbuf_put(b, &mask, sizeof mask);
280 nxm_put_16m(struct ofpbuf *b, uint32_t header, ovs_be16 value, ovs_be16 mask)
286 case CONSTANT_HTONS(UINT16_MAX):
287 nxm_put_16(b, header, value);
291 nxm_put_16w(b, NXM_MAKE_WILD_HEADER(header), value, mask);
297 nxm_put_32(struct ofpbuf *b, uint32_t header, ovs_be32 value)
299 nxm_put_header(b, header);
300 ofpbuf_put(b, &value, sizeof value);
304 nxm_put_32w(struct ofpbuf *b, uint32_t header, ovs_be32 value, ovs_be32 mask)
306 nxm_put_header(b, header);
307 ofpbuf_put(b, &value, sizeof value);
308 ofpbuf_put(b, &mask, sizeof mask);
312 nxm_put_32m(struct ofpbuf *b, uint32_t header, ovs_be32 value, ovs_be32 mask)
318 case CONSTANT_HTONL(UINT32_MAX):
319 nxm_put_32(b, header, value);
323 nxm_put_32w(b, NXM_MAKE_WILD_HEADER(header), value, mask);
329 nxm_put_64(struct ofpbuf *b, uint32_t header, ovs_be64 value)
331 nxm_put_header(b, header);
332 ofpbuf_put(b, &value, sizeof value);
336 nxm_put_64w(struct ofpbuf *b, uint32_t header, ovs_be64 value, ovs_be64 mask)
338 nxm_put_header(b, header);
339 ofpbuf_put(b, &value, sizeof value);
340 ofpbuf_put(b, &mask, sizeof mask);
344 nxm_put_64m(struct ofpbuf *b, uint32_t header, ovs_be64 value, ovs_be64 mask)
350 case CONSTANT_HTONLL(UINT64_MAX):
351 nxm_put_64(b, header, value);
355 nxm_put_64w(b, NXM_MAKE_WILD_HEADER(header), value, mask);
361 nxm_put_eth(struct ofpbuf *b, uint32_t header,
362 const uint8_t value[ETH_ADDR_LEN])
364 nxm_put_header(b, header);
365 ofpbuf_put(b, value, ETH_ADDR_LEN);
369 nxm_put_eth_masked(struct ofpbuf *b, uint32_t header,
370 const uint8_t value[ETH_ADDR_LEN],
371 const uint8_t mask[ETH_ADDR_LEN])
373 if (!eth_addr_is_zero(mask)) {
374 if (eth_mask_is_exact(mask)) {
375 nxm_put_eth(b, header, value);
377 nxm_put_header(b, NXM_MAKE_WILD_HEADER(header));
378 ofpbuf_put(b, value, ETH_ADDR_LEN);
379 ofpbuf_put(b, mask, ETH_ADDR_LEN);
385 nxm_put_ipv6(struct ofpbuf *b, uint32_t header,
386 const struct in6_addr *value, const struct in6_addr *mask)
388 if (ipv6_mask_is_any(mask)) {
390 } else if (ipv6_mask_is_exact(mask)) {
391 nxm_put_header(b, header);
392 ofpbuf_put(b, value, sizeof *value);
394 nxm_put_header(b, NXM_MAKE_WILD_HEADER(header));
395 ofpbuf_put(b, value, sizeof *value);
396 ofpbuf_put(b, mask, sizeof *mask);
401 nxm_put_frag(struct ofpbuf *b, const struct cls_rule *cr)
403 uint8_t nw_frag = cr->flow.nw_frag;
404 uint8_t nw_frag_mask = cr->wc.nw_frag_mask;
406 switch (nw_frag_mask) {
410 case FLOW_NW_FRAG_MASK:
411 nxm_put_8(b, NXM_NX_IP_FRAG, nw_frag);
415 nxm_put_8m(b, NXM_NX_IP_FRAG, nw_frag,
416 nw_frag_mask & FLOW_NW_FRAG_MASK);
422 nxm_put_ip(struct ofpbuf *b, const struct cls_rule *cr,
423 uint8_t icmp_proto, uint32_t icmp_type, uint32_t icmp_code,
426 const flow_wildcards_t wc = cr->wc.wildcards;
427 const struct flow *flow = &cr->flow;
431 if (!(wc & FWW_NW_DSCP)) {
432 nxm_put_8(b, oxm ? OXM_OF_IP_DSCP : NXM_OF_IP_TOS,
433 flow->nw_tos & IP_DSCP_MASK);
436 if (!(wc & FWW_NW_ECN)) {
437 nxm_put_8(b, oxm ? OXM_OF_IP_ECN : NXM_NX_IP_ECN,
438 flow->nw_tos & IP_ECN_MASK);
441 if (!oxm && !(wc & FWW_NW_TTL)) {
442 nxm_put_8(b, NXM_NX_IP_TTL, flow->nw_ttl);
445 if (!(wc & FWW_NW_PROTO)) {
446 nxm_put_8(b, oxm ? OXM_OF_IP_PROTO : NXM_OF_IP_PROTO, flow->nw_proto);
448 if (flow->nw_proto == IPPROTO_TCP) {
449 nxm_put_16m(b, oxm ? OXM_OF_TCP_SRC : NXM_OF_TCP_SRC,
450 flow->tp_src, cr->wc.tp_src_mask);
451 nxm_put_16m(b, oxm ? OXM_OF_TCP_DST : NXM_OF_TCP_DST,
452 flow->tp_dst, cr->wc.tp_dst_mask);
453 } else if (flow->nw_proto == IPPROTO_UDP) {
454 nxm_put_16m(b, oxm ? OXM_OF_UDP_SRC : NXM_OF_UDP_SRC,
455 flow->tp_src, cr->wc.tp_src_mask);
456 nxm_put_16m(b, oxm ? OXM_OF_UDP_DST : NXM_OF_UDP_DST,
457 flow->tp_dst, cr->wc.tp_dst_mask);
458 } else if (flow->nw_proto == icmp_proto) {
459 if (cr->wc.tp_src_mask) {
460 nxm_put_8(b, icmp_type, ntohs(flow->tp_src));
462 if (cr->wc.tp_dst_mask) {
463 nxm_put_8(b, icmp_code, ntohs(flow->tp_dst));
469 /* Appends to 'b' the nx_match format that expresses 'cr' (except for
470 * 'cr->priority', because priority is not part of nx_match), plus enough
471 * zero bytes to pad the nx_match out to a multiple of 8. For Flow Mod
472 * and Flow Stats Requests messages, a 'cookie' and 'cookie_mask' may be
473 * supplied. Otherwise, 'cookie_mask' should be zero.
475 * This function can cause 'b''s data to be reallocated.
477 * Returns the number of bytes appended to 'b', excluding padding.
479 * If 'cr' is a catch-all rule that matches every packet, then this function
480 * appends nothing to 'b' and returns 0. */
482 nx_put_match(struct ofpbuf *b, bool oxm, const struct cls_rule *cr,
483 ovs_be64 cookie, ovs_be64 cookie_mask)
485 const flow_wildcards_t wc = cr->wc.wildcards;
486 const struct flow *flow = &cr->flow;
487 const size_t start_len = b->size;
491 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 12);
494 if (!(wc & FWW_IN_PORT)) {
495 uint16_t in_port = flow->in_port;
497 nxm_put_32(b, OXM_OF_IN_PORT, ofputil_port_to_ofp11(in_port));
499 nxm_put_16(b, NXM_OF_IN_PORT, htons(in_port));
504 nxm_put_eth_masked(b, oxm ? OXM_OF_ETH_SRC : NXM_OF_ETH_SRC,
505 flow->dl_src, cr->wc.dl_src_mask);
506 nxm_put_eth_masked(b, oxm ? OXM_OF_ETH_DST : NXM_OF_ETH_DST,
507 flow->dl_dst, cr->wc.dl_dst_mask);
508 if (!(wc & FWW_DL_TYPE)) {
509 nxm_put_16(b, oxm ? OXM_OF_ETH_TYPE : NXM_OF_ETH_TYPE,
510 ofputil_dl_type_to_openflow(flow->dl_type));
515 * XXX missing OXM support */
516 nxm_put_16m(b, NXM_OF_VLAN_TCI, flow->vlan_tci, cr->wc.vlan_tci_mask);
519 if (!(wc & FWW_DL_TYPE) && flow->dl_type == htons(ETH_TYPE_IP)) {
521 nxm_put_32m(b, oxm ? OXM_OF_IPV4_SRC : NXM_OF_IP_SRC,
522 flow->nw_src, cr->wc.nw_src_mask);
523 nxm_put_32m(b, oxm ? OXM_OF_IPV4_DST : NXM_OF_IP_DST,
524 flow->nw_dst, cr->wc.nw_dst_mask);
525 nxm_put_ip(b, cr, IPPROTO_ICMP,
526 oxm ? OXM_OF_ICMPV4_TYPE : NXM_OF_ICMP_TYPE,
527 oxm ? OXM_OF_ICMPV4_CODE : NXM_OF_ICMP_CODE, oxm);
528 } else if (!(wc & FWW_DL_TYPE) && flow->dl_type == htons(ETH_TYPE_IPV6)) {
530 nxm_put_ipv6(b, oxm ? OXM_OF_IPV6_SRC : NXM_NX_IPV6_SRC,
531 &flow->ipv6_src, &cr->wc.ipv6_src_mask);
532 nxm_put_ipv6(b, oxm ? OXM_OF_IPV6_DST : NXM_NX_IPV6_DST,
533 &flow->ipv6_dst, &cr->wc.ipv6_dst_mask);
534 nxm_put_ip(b, cr, IPPROTO_ICMPV6,
535 oxm ? OXM_OF_ICMPV6_TYPE : NXM_NX_ICMPV6_TYPE,
536 oxm ? OXM_OF_ICMPV6_CODE : NXM_NX_ICMPV6_CODE, oxm);
538 if (!(wc & FWW_IPV6_LABEL)) {
539 nxm_put_32(b, oxm ? OXM_OF_IPV6_FLABEL : NXM_NX_IPV6_LABEL,
543 if (flow->nw_proto == IPPROTO_ICMPV6
544 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
545 flow->tp_src == htons(ND_NEIGHBOR_ADVERT))) {
546 nxm_put_ipv6(b, oxm ? OXM_OF_IPV6_ND_TARGET : NXM_NX_ND_TARGET,
547 &flow->nd_target, &cr->wc.nd_target_mask);
548 if (!(wc & FWW_ARP_SHA)
549 && flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)) {
550 nxm_put_eth(b, oxm ? OXM_OF_IPV6_ND_SLL : NXM_NX_ND_SLL,
553 if (!(wc & FWW_ARP_THA)
554 && flow->tp_src == htons(ND_NEIGHBOR_ADVERT)) {
555 nxm_put_eth(b, oxm ? OXM_OF_IPV6_ND_TLL : NXM_NX_ND_TLL,
559 } else if (!(wc & FWW_DL_TYPE) && flow->dl_type == htons(ETH_TYPE_ARP)) {
561 if (!(wc & FWW_NW_PROTO)) {
562 nxm_put_16(b, oxm ? OXM_OF_ARP_OP : NXM_OF_ARP_OP,
563 htons(flow->nw_proto));
565 nxm_put_32m(b, oxm ? OXM_OF_ARP_SPA : NXM_OF_ARP_SPA,
566 flow->nw_src, cr->wc.nw_src_mask);
567 nxm_put_32m(b, oxm ? OXM_OF_ARP_TPA : NXM_OF_ARP_TPA,
568 flow->nw_dst, cr->wc.nw_dst_mask);
569 if (!(wc & FWW_ARP_SHA)) {
570 nxm_put_eth(b, oxm ? OXM_OF_ARP_SHA : NXM_NX_ARP_SHA,
573 if (!(wc & FWW_ARP_THA)) {
574 nxm_put_eth(b, oxm ? OXM_OF_ARP_THA : NXM_NX_ARP_THA,
580 nxm_put_64m(b, NXM_NX_TUN_ID, flow->tun_id, cr->wc.tun_id_mask);
583 for (i = 0; i < FLOW_N_REGS; i++) {
584 nxm_put_32m(b, NXM_NX_REG(i),
585 htonl(flow->regs[i]), htonl(cr->wc.reg_masks[i]));
588 /* OpenFlow 1.1+ Metadata. */
589 nxm_put_64m(b, OXM_OF_METADATA, flow->metadata, cr->wc.metadata_mask);
592 nxm_put_64m(b, NXM_NX_COOKIE, cookie, cookie_mask);
594 match_len = b->size - start_len;
595 ofpbuf_put_zeros(b, ROUND_UP(match_len, 8) - match_len);
599 /* nx_match_to_string() and helpers. */
601 static void format_nxm_field_name(struct ds *, uint32_t header);
604 nx_match_to_string(const uint8_t *p, unsigned int match_len)
610 return xstrdup("<any>");
614 while ((header = nx_entry_ok(p, match_len)) != 0) {
615 unsigned int length = NXM_LENGTH(header);
616 unsigned int value_len = nxm_field_bytes(header);
617 const uint8_t *value = p + 4;
618 const uint8_t *mask = value + value_len;
622 ds_put_cstr(&s, ", ");
625 format_nxm_field_name(&s, header);
626 ds_put_char(&s, '(');
628 for (i = 0; i < value_len; i++) {
629 ds_put_format(&s, "%02x", value[i]);
631 if (NXM_HASMASK(header)) {
632 ds_put_char(&s, '/');
633 for (i = 0; i < value_len; i++) {
634 ds_put_format(&s, "%02x", mask[i]);
637 ds_put_char(&s, ')');
640 match_len -= 4 + length;
645 ds_put_cstr(&s, ", ");
648 ds_put_format(&s, "<%u invalid bytes>", match_len);
651 return ds_steal_cstr(&s);
655 format_nxm_field_name(struct ds *s, uint32_t header)
657 const struct mf_field *mf = mf_from_nxm_header(header);
659 ds_put_cstr(s, IS_OXM_HEADER(header) ? mf->oxm_name : mf->nxm_name);
660 if (NXM_HASMASK(header)) {
661 ds_put_cstr(s, "_W");
663 } else if (header == NXM_NX_COOKIE) {
664 ds_put_cstr(s, "NXM_NX_COOKIE");
665 } else if (header == NXM_NX_COOKIE_W) {
666 ds_put_cstr(s, "NXM_NX_COOKIE_W");
668 ds_put_format(s, "%d:%d", NXM_VENDOR(header), NXM_FIELD(header));
673 parse_nxm_field_name(const char *name, int name_len)
678 /* Check whether it's a field name. */
679 wild = name_len > 2 && !memcmp(&name[name_len - 2], "_W", 2);
684 for (i = 0; i < MFF_N_IDS; i++) {
685 const struct mf_field *mf = mf_from_id(i);
689 !strncmp(mf->nxm_name, name, name_len) &&
690 mf->nxm_name[name_len] == '\0') {
691 header = mf->nxm_header;
692 } else if (mf->oxm_name &&
693 !strncmp(mf->oxm_name, name, name_len) &&
694 mf->oxm_name[name_len] == '\0') {
695 header = mf->oxm_header;
702 } else if (mf->maskable != MFM_NONE) {
703 return NXM_MAKE_WILD_HEADER(header);
707 if (!strncmp("NXM_NX_COOKIE", name, name_len) &&
708 (name_len == strlen("NXM_NX_COOKIE"))) {
710 return NXM_NX_COOKIE;
712 return NXM_NX_COOKIE_W;
716 /* Check whether it's a 32-bit field header value as hex.
717 * (This isn't ordinarily useful except for testing error behavior.) */
719 uint32_t header = hexits_value(name, name_len, NULL);
720 if (header != UINT_MAX) {
728 /* nx_match_from_string(). */
731 nx_match_from_string(const char *s, struct ofpbuf *b)
733 const char *full_s = s;
734 const size_t start_len = b->size;
737 if (!strcmp(s, "<any>")) {
738 /* Ensure that 'b->data' isn't actually null. */
739 ofpbuf_prealloc_tailroom(b, 1);
743 for (s += strspn(s, ", "); *s; s += strspn(s, ", ")) {
750 name_len = strcspn(s, "(");
751 if (s[name_len] != '(') {
752 ovs_fatal(0, "%s: missing ( at end of nx_match", full_s);
755 header = parse_nxm_field_name(name, name_len);
757 ovs_fatal(0, "%s: unknown field `%.*s'", full_s, name_len, s);
762 nxm_put_header(b, header);
763 s = ofpbuf_put_hex(b, s, &n);
764 if (n != nxm_field_bytes(header)) {
765 ovs_fatal(0, "%.2s: hex digits expected", s);
767 if (NXM_HASMASK(header)) {
770 ovs_fatal(0, "%s: missing / in masked field %.*s",
771 full_s, name_len, name);
773 s = ofpbuf_put_hex(b, s + 1, &n);
774 if (n != nxm_field_bytes(header)) {
775 ovs_fatal(0, "%.2s: hex digits expected", s);
781 ovs_fatal(0, "%s: missing ) following field %.*s",
782 full_s, name_len, name);
787 match_len = b->size - start_len;
788 ofpbuf_put_zeros(b, ROUND_UP(match_len, 8) - match_len);
793 nxm_parse_reg_move(struct ofpact_reg_move *move, const char *s)
795 const char *full_s = s;
797 s = mf_parse_subfield(&move->src, s);
798 if (strncmp(s, "->", 2)) {
799 ovs_fatal(0, "%s: missing `->' following source", full_s);
802 s = mf_parse_subfield(&move->dst, s);
804 ovs_fatal(0, "%s: trailing garbage following destination", full_s);
807 if (move->src.n_bits != move->dst.n_bits) {
808 ovs_fatal(0, "%s: source field is %d bits wide but destination is "
809 "%d bits wide", full_s,
810 move->src.n_bits, move->dst.n_bits);
815 nxm_parse_reg_load(struct ofpact_reg_load *load, const char *s)
817 const char *full_s = s;
819 load->value = strtoull(s, (char **) &s, 0);
820 if (strncmp(s, "->", 2)) {
821 ovs_fatal(0, "%s: missing `->' following value", full_s);
824 s = mf_parse_subfield(&load->dst, s);
826 ovs_fatal(0, "%s: trailing garbage following destination", full_s);
829 if (load->dst.n_bits < 64 && (load->value >> load->dst.n_bits) != 0) {
830 ovs_fatal(0, "%s: value %"PRIu64" does not fit into %d bits",
831 full_s, load->value, load->dst.n_bits);
835 /* nxm_format_reg_move(), nxm_format_reg_load(). */
838 nxm_format_reg_move(const struct ofpact_reg_move *move, struct ds *s)
840 ds_put_format(s, "move:");
841 mf_format_subfield(&move->src, s);
842 ds_put_cstr(s, "->");
843 mf_format_subfield(&move->dst, s);
847 nxm_format_reg_load(const struct ofpact_reg_load *load, struct ds *s)
849 ds_put_format(s, "load:%#"PRIx64"->", load->value);
850 mf_format_subfield(&load->dst, s);
854 nxm_reg_move_from_openflow(const struct nx_action_reg_move *narm,
855 struct ofpbuf *ofpacts)
857 struct ofpact_reg_move *move;
859 move = ofpact_put_REG_MOVE(ofpacts);
860 move->src.field = mf_from_nxm_header(ntohl(narm->src));
861 move->src.ofs = ntohs(narm->src_ofs);
862 move->src.n_bits = ntohs(narm->n_bits);
863 move->dst.field = mf_from_nxm_header(ntohl(narm->dst));
864 move->dst.ofs = ntohs(narm->dst_ofs);
865 move->dst.n_bits = ntohs(narm->n_bits);
867 return nxm_reg_move_check(move, NULL);
871 nxm_reg_load_from_openflow(const struct nx_action_reg_load *narl,
872 struct ofpbuf *ofpacts)
874 struct ofpact_reg_load *load;
876 load = ofpact_put_REG_LOAD(ofpacts);
877 load->dst.field = mf_from_nxm_header(ntohl(narl->dst));
878 load->dst.ofs = nxm_decode_ofs(narl->ofs_nbits);
879 load->dst.n_bits = nxm_decode_n_bits(narl->ofs_nbits);
880 load->value = ntohll(narl->value);
882 /* Reject 'narl' if a bit numbered 'n_bits' or higher is set to 1 in
884 if (load->dst.n_bits < 64 && load->value >> load->dst.n_bits) {
885 return OFPERR_OFPBAC_BAD_ARGUMENT;
888 return nxm_reg_load_check(load, NULL);
892 nxm_reg_move_check(const struct ofpact_reg_move *move, const struct flow *flow)
896 error = mf_check_src(&move->src, flow);
901 return mf_check_dst(&move->dst, NULL);
905 nxm_reg_load_check(const struct ofpact_reg_load *load, const struct flow *flow)
907 return mf_check_dst(&load->dst, flow);
911 nxm_reg_move_to_nxast(const struct ofpact_reg_move *move,
912 struct ofpbuf *openflow)
914 struct nx_action_reg_move *narm;
916 narm = ofputil_put_NXAST_REG_MOVE(openflow);
917 narm->n_bits = htons(move->dst.n_bits);
918 narm->src_ofs = htons(move->src.ofs);
919 narm->dst_ofs = htons(move->dst.ofs);
920 narm->src = htonl(move->src.field->nxm_header);
921 narm->dst = htonl(move->dst.field->nxm_header);
925 nxm_reg_load_to_nxast(const struct ofpact_reg_load *load,
926 struct ofpbuf *openflow)
928 struct nx_action_reg_load *narl;
930 narl = ofputil_put_NXAST_REG_LOAD(openflow);
931 narl->ofs_nbits = nxm_encode_ofs_nbits(load->dst.ofs, load->dst.n_bits);
932 narl->dst = htonl(load->dst.field->nxm_header);
933 narl->value = htonll(load->value);
936 /* nxm_execute_reg_move(), nxm_execute_reg_load(). */
939 nxm_execute_reg_move(const struct ofpact_reg_move *move,
942 union mf_value src_value;
943 union mf_value dst_value;
945 mf_get_value(move->dst.field, flow, &dst_value);
946 mf_get_value(move->src.field, flow, &src_value);
947 bitwise_copy(&src_value, move->src.field->n_bytes, move->src.ofs,
948 &dst_value, move->dst.field->n_bytes, move->dst.ofs,
950 mf_set_flow_value(move->dst.field, &dst_value, flow);
954 nxm_execute_reg_load(const struct ofpact_reg_load *load, struct flow *flow)
956 nxm_reg_load(&load->dst, load->value, flow);
960 nxm_reg_load(const struct mf_subfield *dst, uint64_t src_data,
963 union mf_value dst_value;
964 union mf_value src_value;
966 mf_get_value(dst->field, flow, &dst_value);
967 src_value.be64 = htonll(src_data);
968 bitwise_copy(&src_value, sizeof src_value.be64, 0,
969 &dst_value, dst->field->n_bytes, dst->ofs,
971 mf_set_flow_value(dst->field, &dst_value, flow);