2 * Copyright (c) 2011, 2012, 2013 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.
19 #include "meta-flow.h"
23 #include <netinet/icmp6.h>
24 #include <netinet/ip6.h>
26 #include "classifier.h"
27 #include "dynamic-string.h"
28 #include "ofp-errors.h"
33 #include "socket-util.h"
34 #include "unaligned.h"
37 VLOG_DEFINE_THIS_MODULE(meta_flow);
39 #define MF_FIELD_SIZES(MEMBER) \
40 sizeof ((union mf_value *)0)->MEMBER, \
41 8 * sizeof ((union mf_value *)0)->MEMBER
43 static const struct mf_field mf_fields[MFF_N_IDS] = {
49 MFF_TUN_ID, "tun_id", NULL,
55 NXM_NX_TUN_ID, "NXM_NX_TUN_ID",
56 OXM_OF_TUNNEL_ID, "OXM_OF_TUNNEL_ID",
58 MFF_TUN_SRC, "tun_src", NULL,
67 MFF_TUN_DST, "tun_dst", NULL,
76 MFF_TUN_FLAGS, "tun_flags", NULL,
85 MFF_TUN_TOS, "tun_tos", NULL,
94 MFF_TUN_TTL, "tun_ttl", NULL,
103 MFF_METADATA, "metadata", NULL,
104 MF_FIELD_SIZES(be64),
109 OXM_OF_METADATA, "OXM_OF_METADATA",
110 OXM_OF_METADATA, "OXM_OF_METADATA",
112 MFF_IN_PORT, "in_port", NULL,
113 MF_FIELD_SIZES(be16),
118 NXM_OF_IN_PORT, "NXM_OF_IN_PORT",
119 OXM_OF_IN_PORT, "OXM_OF_IN_PORT",
121 MFF_SKB_PRIORITY, "skb_priority", NULL,
122 MF_FIELD_SIZES(be32),
130 MFF_SKB_MARK, "skb_mark", NULL,
131 MF_FIELD_SIZES(be32),
140 #define REGISTER(IDX) \
142 MFF_REG##IDX, "reg" #IDX, NULL, \
143 MF_FIELD_SIZES(be32), \
148 NXM_NX_REG(IDX), "NXM_NX_REG" #IDX, \
149 NXM_NX_REG(IDX), "NXM_NX_REG" #IDX, \
184 MFF_ETH_SRC, "eth_src", "dl_src",
190 NXM_OF_ETH_SRC, "NXM_OF_ETH_SRC",
191 OXM_OF_ETH_SRC, "OXM_OF_ETH_SRC",
193 MFF_ETH_DST, "eth_dst", "dl_dst",
199 NXM_OF_ETH_DST, "NXM_OF_ETH_DST",
200 OXM_OF_ETH_DST, "OXM_OF_ETH_DST",
202 MFF_ETH_TYPE, "eth_type", "dl_type",
203 MF_FIELD_SIZES(be16),
208 NXM_OF_ETH_TYPE, "NXM_OF_ETH_TYPE",
209 OXM_OF_ETH_TYPE, "OXM_OF_ETH_TYPE",
213 MFF_VLAN_TCI, "vlan_tci", NULL,
214 MF_FIELD_SIZES(be16),
219 NXM_OF_VLAN_TCI, "NXM_OF_VLAN_TCI",
220 NXM_OF_VLAN_TCI, "NXM_OF_VLAN_TCI",
222 MFF_DL_VLAN, "dl_vlan", NULL,
223 sizeof(ovs_be16), 12,
231 MFF_VLAN_VID, "vlan_vid", NULL,
232 sizeof(ovs_be16), 12,
237 OXM_OF_VLAN_VID, "OXM_OF_VLAN_VID",
238 OXM_OF_VLAN_VID, "OXM_OF_VLAN_VID",
240 MFF_DL_VLAN_PCP, "dl_vlan_pcp", NULL,
249 MFF_VLAN_PCP, "vlan_pcp", NULL,
255 OXM_OF_VLAN_PCP, "OXM_OF_VLAN_PCP",
256 OXM_OF_VLAN_PCP, "OXM_OF_VLAN_PCP",
263 MFF_MPLS_LABEL, "mpls_label", NULL,
269 OXM_OF_MPLS_LABEL, "OXM_OF_MPLS_LABEL",
270 OXM_OF_MPLS_LABEL, "OXM_OF_MPLS_LABEL",
272 MFF_MPLS_TC, "mpls_tc", NULL,
278 OXM_OF_MPLS_TC, "OXM_OF_MPLS_TC",
279 OXM_OF_MPLS_TC, "OXM_OF_MPLS_TC",
281 MFF_MPLS_BOS, "mpls_bos", NULL,
287 OXM_OF_MPLS_BOS, "OXM_OF_MPLS_BOS",
288 OXM_OF_MPLS_BOS, "OXM_OF_MPLS_BOS",
296 MFF_IPV4_SRC, "ip_src", "nw_src",
297 MF_FIELD_SIZES(be32),
302 NXM_OF_IP_SRC, "NXM_OF_IP_SRC",
303 OXM_OF_IPV4_SRC, "OXM_OF_IPV4_SRC",
305 MFF_IPV4_DST, "ip_dst", "nw_dst",
306 MF_FIELD_SIZES(be32),
311 NXM_OF_IP_DST, "NXM_OF_IP_DST",
312 OXM_OF_IPV4_DST, "OXM_OF_IPV4_DST",
316 MFF_IPV6_SRC, "ipv6_src", NULL,
317 MF_FIELD_SIZES(ipv6),
322 NXM_NX_IPV6_SRC, "NXM_NX_IPV6_SRC",
323 OXM_OF_IPV6_SRC, "OXM_OF_IPV6_SRC",
325 MFF_IPV6_DST, "ipv6_dst", NULL,
326 MF_FIELD_SIZES(ipv6),
331 NXM_NX_IPV6_DST, "NXM_NX_IPV6_DST",
332 OXM_OF_IPV6_DST, "OXM_OF_IPV6_DST",
335 MFF_IPV6_LABEL, "ipv6_label", NULL,
341 NXM_NX_IPV6_LABEL, "NXM_NX_IPV6_LABEL",
342 OXM_OF_IPV6_FLABEL, "OXM_OF_IPV6_FLABEL",
346 MFF_IP_PROTO, "nw_proto", NULL,
352 NXM_OF_IP_PROTO, "NXM_OF_IP_PROTO",
353 OXM_OF_IP_PROTO, "OXM_OF_IP_PROTO",
355 MFF_IP_DSCP, "nw_tos", NULL,
361 NXM_OF_IP_TOS, "NXM_OF_IP_TOS",
362 NXM_OF_IP_TOS, "NXM_OF_IP_TOS",
364 MFF_IP_DSCP_SHIFTED, "nw_tos_shifted", NULL,
370 OXM_OF_IP_DSCP, "OXM_OF_IP_DSCP",
371 OXM_OF_IP_DSCP, "OXM_OF_IP_DSCP",
373 MFF_IP_ECN, "nw_ecn", NULL,
379 NXM_NX_IP_ECN, "NXM_NX_IP_ECN",
380 OXM_OF_IP_ECN, "OXM_OF_IP_ECN",
382 MFF_IP_TTL, "nw_ttl", NULL,
388 NXM_NX_IP_TTL, "NXM_NX_IP_TTL",
389 NXM_NX_IP_TTL, "NXM_NX_IP_TTL",
391 MFF_IP_FRAG, "ip_frag", NULL,
397 NXM_NX_IP_FRAG, "NXM_NX_IP_FRAG",
398 NXM_NX_IP_FRAG, "NXM_NX_IP_FRAG",
402 MFF_ARP_OP, "arp_op", NULL,
403 MF_FIELD_SIZES(be16),
408 NXM_OF_ARP_OP, "NXM_OF_ARP_OP",
409 OXM_OF_ARP_OP, "OXM_OF_ARP_OP",
411 MFF_ARP_SPA, "arp_spa", NULL,
412 MF_FIELD_SIZES(be32),
417 NXM_OF_ARP_SPA, "NXM_OF_ARP_SPA",
418 OXM_OF_ARP_SPA, "OXM_OF_ARP_SPA",
420 MFF_ARP_TPA, "arp_tpa", NULL,
421 MF_FIELD_SIZES(be32),
426 NXM_OF_ARP_TPA, "NXM_OF_ARP_TPA",
427 OXM_OF_ARP_TPA, "OXM_OF_ARP_TPA",
429 MFF_ARP_SHA, "arp_sha", NULL,
435 NXM_NX_ARP_SHA, "NXM_NX_ARP_SHA",
436 OXM_OF_ARP_SHA, "OXM_OF_ARP_SHA",
438 MFF_ARP_THA, "arp_tha", NULL,
444 NXM_NX_ARP_THA, "NXM_NX_ARP_THA",
445 OXM_OF_ARP_THA, "OXM_OF_ARP_THA",
453 MFF_TCP_SRC, "tcp_src", "tp_src",
454 MF_FIELD_SIZES(be16),
459 NXM_OF_TCP_SRC, "NXM_OF_TCP_SRC",
460 OXM_OF_TCP_SRC, "OXM_OF_TCP_SRC",
462 MFF_TCP_DST, "tcp_dst", "tp_dst",
463 MF_FIELD_SIZES(be16),
468 NXM_OF_TCP_DST, "NXM_OF_TCP_DST",
469 OXM_OF_TCP_DST, "OXM_OF_TCP_DST",
473 MFF_UDP_SRC, "udp_src", NULL,
474 MF_FIELD_SIZES(be16),
479 NXM_OF_UDP_SRC, "NXM_OF_UDP_SRC",
480 OXM_OF_UDP_SRC, "OXM_OF_UDP_SRC",
482 MFF_UDP_DST, "udp_dst", NULL,
483 MF_FIELD_SIZES(be16),
488 NXM_OF_UDP_DST, "NXM_OF_UDP_DST",
489 OXM_OF_UDP_DST, "OXM_OF_UDP_DST",
493 MFF_ICMPV4_TYPE, "icmp_type", NULL,
499 NXM_OF_ICMP_TYPE, "NXM_OF_ICMP_TYPE",
500 OXM_OF_ICMPV4_TYPE, "OXM_OF_ICMPV4_TYPE",
502 MFF_ICMPV4_CODE, "icmp_code", NULL,
508 NXM_OF_ICMP_CODE, "NXM_OF_ICMP_CODE",
509 OXM_OF_ICMPV4_CODE, "OXM_OF_ICMPV4_CODE",
513 MFF_ICMPV6_TYPE, "icmpv6_type", NULL,
519 NXM_NX_ICMPV6_TYPE, "NXM_NX_ICMPV6_TYPE",
520 OXM_OF_ICMPV6_TYPE, "OXM_OF_ICMPV6_TYPE",
522 MFF_ICMPV6_CODE, "icmpv6_code", NULL,
528 NXM_NX_ICMPV6_CODE, "NXM_NX_ICMPV6_CODE",
529 OXM_OF_ICMPV6_CODE, "OXM_OF_ICMPV6_CODE",
537 MFF_ND_TARGET, "nd_target", NULL,
538 MF_FIELD_SIZES(ipv6),
543 NXM_NX_ND_TARGET, "NXM_NX_ND_TARGET",
544 OXM_OF_IPV6_ND_TARGET, "OXM_OF_IPV6_ND_TARGET",
546 MFF_ND_SLL, "nd_sll", NULL,
552 NXM_NX_ND_SLL, "NXM_NX_ND_SLL",
553 OXM_OF_IPV6_ND_SLL, "OXM_OF_IPV6_ND_SLL",
555 MFF_ND_TLL, "nd_tll", NULL,
561 NXM_NX_ND_TLL, "NXM_NX_ND_TLL",
562 OXM_OF_IPV6_ND_TLL, "OXM_OF_IPV6_ND_TLL",
566 /* Maps an NXM or OXM header value to an mf_field. */
568 struct hmap_node hmap_node; /* In 'all_fields' hmap. */
569 uint32_t header; /* NXM or OXM header value. */
570 const struct mf_field *mf;
573 /* Contains 'struct nxm_field's. */
574 static struct hmap all_fields = HMAP_INITIALIZER(&all_fields);
576 /* Rate limit for parse errors. These always indicate a bug in an OpenFlow
577 * controller and so there's not much point in showing a lot of them. */
578 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
580 const struct mf_field *mf_from_nxm_header__(uint32_t header);
582 /* Returns the field with the given 'id'. */
583 const struct mf_field *
584 mf_from_id(enum mf_field_id id)
586 ovs_assert((unsigned int) id < MFF_N_IDS);
587 return &mf_fields[id];
590 /* Returns the field with the given 'name', or a null pointer if no field has
592 const struct mf_field *
593 mf_from_name(const char *name)
595 static struct shash mf_by_name = SHASH_INITIALIZER(&mf_by_name);
597 if (shash_is_empty(&mf_by_name)) {
598 const struct mf_field *mf;
600 for (mf = mf_fields; mf < &mf_fields[MFF_N_IDS]; mf++) {
601 shash_add_once(&mf_by_name, mf->name, mf);
602 if (mf->extra_name) {
603 shash_add_once(&mf_by_name, mf->extra_name, mf);
608 return shash_find_data(&mf_by_name, name);
612 add_nxm_field(uint32_t header, const struct mf_field *mf)
616 f = xmalloc(sizeof *f);
617 hmap_insert(&all_fields, &f->hmap_node, hash_int(header, 0));
623 nxm_init_add_field(const struct mf_field *mf, uint32_t header)
626 ovs_assert(!mf_from_nxm_header__(header));
627 add_nxm_field(header, mf);
628 if (mf->maskable != MFM_NONE) {
629 add_nxm_field(NXM_MAKE_WILD_HEADER(header), mf);
637 const struct mf_field *mf;
639 for (mf = mf_fields; mf < &mf_fields[MFF_N_IDS]; mf++) {
640 nxm_init_add_field(mf, mf->nxm_header);
641 if (mf->oxm_header != mf->nxm_header) {
642 nxm_init_add_field(mf, mf->oxm_header);
647 const struct mf_field *
648 mf_from_nxm_header(uint32_t header)
650 if (hmap_is_empty(&all_fields)) {
653 return mf_from_nxm_header__(header);
656 const struct mf_field *
657 mf_from_nxm_header__(uint32_t header)
659 const struct nxm_field *f;
661 HMAP_FOR_EACH_IN_BUCKET (f, hmap_node, hash_int(header, 0), &all_fields) {
662 if (f->header == header) {
670 /* Returns true if 'wc' wildcards all the bits in field 'mf', false if 'wc'
671 * specifies at least one bit in the field.
673 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
674 * meets 'mf''s prerequisites. */
676 mf_is_all_wild(const struct mf_field *mf, const struct flow_wildcards *wc)
685 return !wc->masks.tunnel.tun_id;
687 return !wc->masks.metadata;
689 return !wc->masks.in_port;
690 case MFF_SKB_PRIORITY:
691 return !wc->masks.skb_priority;
693 return !wc->masks.skb_mark;
695 return !wc->masks.regs[mf->id - MFF_REG0];
698 return eth_addr_is_zero(wc->masks.dl_src);
700 return eth_addr_is_zero(wc->masks.dl_dst);
702 return !wc->masks.dl_type;
706 return eth_addr_is_zero(wc->masks.arp_sha);
710 return eth_addr_is_zero(wc->masks.arp_tha);
713 return !wc->masks.vlan_tci;
715 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK));
717 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI));
718 case MFF_DL_VLAN_PCP:
720 return !(wc->masks.vlan_tci & htons(VLAN_PCP_MASK));
723 return !(wc->masks.mpls_lse & htonl(MPLS_LABEL_MASK));
725 return !(wc->masks.mpls_lse & htonl(MPLS_TC_MASK));
727 return !(wc->masks.mpls_lse & htonl(MPLS_BOS_MASK));
730 return !wc->masks.nw_src;
732 return !wc->masks.nw_dst;
735 return ipv6_mask_is_any(&wc->masks.ipv6_src);
737 return ipv6_mask_is_any(&wc->masks.ipv6_dst);
740 return !wc->masks.ipv6_label;
743 return !wc->masks.nw_proto;
745 case MFF_IP_DSCP_SHIFTED:
746 return !(wc->masks.nw_tos & IP_DSCP_MASK);
748 return !(wc->masks.nw_tos & IP_ECN_MASK);
750 return !wc->masks.nw_ttl;
753 return ipv6_mask_is_any(&wc->masks.nd_target);
756 return !(wc->masks.nw_frag & FLOW_NW_FRAG_MASK);
759 return !wc->masks.nw_proto;
761 return !wc->masks.nw_src;
763 return !wc->masks.nw_dst;
767 case MFF_ICMPV4_TYPE:
768 case MFF_ICMPV6_TYPE:
769 return !wc->masks.tp_src;
772 case MFF_ICMPV4_CODE:
773 case MFF_ICMPV6_CODE:
774 return !wc->masks.tp_dst;
782 /* Initializes 'mask' with the wildcard bit pattern for field 'mf' within 'wc'.
783 * Each bit in 'mask' will be set to 1 if the bit is significant for matching
784 * purposes, or to 0 if it is wildcarded.
786 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
787 * meets 'mf''s prerequisites. */
789 mf_get_mask(const struct mf_field *mf, const struct flow_wildcards *wc,
790 union mf_value *mask)
792 mf_get_value(mf, &wc->masks, mask);
795 /* Tests whether 'mask' is a valid wildcard bit pattern for 'mf'. Returns true
796 * if the mask is valid, false otherwise. */
798 mf_is_mask_valid(const struct mf_field *mf, const union mf_value *mask)
800 switch (mf->maskable) {
802 return (is_all_zeros((const uint8_t *) mask, mf->n_bytes) ||
803 is_all_ones((const uint8_t *) mask, mf->n_bytes));
813 is_icmpv4(const struct flow *flow)
815 return (flow->dl_type == htons(ETH_TYPE_IP)
816 && flow->nw_proto == IPPROTO_ICMP);
820 is_icmpv6(const struct flow *flow)
822 return (flow->dl_type == htons(ETH_TYPE_IPV6)
823 && flow->nw_proto == IPPROTO_ICMPV6);
826 /* Returns true if 'flow' meets the prerequisites for 'mf', false otherwise. */
828 mf_are_prereqs_ok(const struct mf_field *mf, const struct flow *flow)
830 switch (mf->prereqs) {
835 return (flow->dl_type == htons(ETH_TYPE_ARP) ||
836 flow->dl_type == htons(ETH_TYPE_RARP));
838 return flow->dl_type == htons(ETH_TYPE_IP);
840 return flow->dl_type == htons(ETH_TYPE_IPV6);
842 return (flow->vlan_tci & htons(VLAN_CFI)) != 0;
844 return eth_type_mpls(flow->dl_type);
846 return is_ip_any(flow);
849 return is_ip_any(flow) && flow->nw_proto == IPPROTO_TCP;
851 return is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP;
853 return is_icmpv4(flow);
855 return is_icmpv6(flow);
858 return (is_icmpv6(flow)
859 && flow->tp_dst == htons(0)
860 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
861 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
863 return (is_icmpv6(flow)
864 && flow->tp_dst == htons(0)
865 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)));
867 return (is_icmpv6(flow)
868 && flow->tp_dst == htons(0)
869 && (flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
875 /* Returns true if 'value' may be a valid value *as part of a masked match*,
878 * A value is not rejected just because it is not valid for the field in
879 * question, but only if it doesn't make sense to test the bits in question at
880 * all. For example, the MFF_VLAN_TCI field will never have a nonzero value
881 * without the VLAN_CFI bit being set, but we can't reject those values because
882 * it is still legitimate to test just for those bits (see the documentation
883 * for NXM_OF_VLAN_TCI in nicira-ext.h). On the other hand, there is never a
884 * reason to set the low bit of MFF_IP_DSCP to 1, so we reject that. */
886 mf_is_value_valid(const struct mf_field *mf, const union mf_value *value)
897 case MFF_SKB_PRIORITY:
918 case MFF_ICMPV4_TYPE:
919 case MFF_ICMPV4_CODE:
920 case MFF_ICMPV6_TYPE:
921 case MFF_ICMPV6_CODE:
928 return !(value->u8 & ~IP_DSCP_MASK);
929 case MFF_IP_DSCP_SHIFTED:
930 return !(value->u8 & (~IP_DSCP_MASK >> 2));
932 return !(value->u8 & ~IP_ECN_MASK);
934 return !(value->u8 & ~FLOW_NW_FRAG_MASK);
937 return !(value->be16 & htons(0xff00));
940 return !(value->be16 & htons(VLAN_CFI | VLAN_PCP_MASK));
942 return !(value->be16 & htons(VLAN_PCP_MASK));
944 case MFF_DL_VLAN_PCP:
946 return !(value->u8 & ~(VLAN_PCP_MASK >> VLAN_PCP_SHIFT));
949 return !(value->be32 & ~htonl(IPV6_LABEL_MASK));
952 return !(value->be32 & ~htonl(MPLS_LABEL_MASK >> MPLS_LABEL_SHIFT));
955 return !(value->u8 & ~(MPLS_TC_MASK >> MPLS_TC_SHIFT));
958 return !(value->u8 & ~(MPLS_BOS_MASK >> MPLS_BOS_SHIFT));
966 /* Copies the value of field 'mf' from 'flow' into 'value'. The caller is
967 * responsible for ensuring that 'flow' meets 'mf''s prerequisites. */
969 mf_get_value(const struct mf_field *mf, const struct flow *flow,
970 union mf_value *value)
974 value->be64 = flow->tunnel.tun_id;
977 value->be32 = flow->tunnel.ip_src;
980 value->be32 = flow->tunnel.ip_dst;
983 value->be16 = htons(flow->tunnel.flags);
986 value->u8 = flow->tunnel.ip_ttl;
989 value->u8 = flow->tunnel.ip_tos;
993 value->be64 = flow->metadata;
997 value->be16 = htons(flow->in_port);
1000 case MFF_SKB_PRIORITY:
1001 value->be32 = htonl(flow->skb_priority);
1005 value->be32 = htonl(flow->skb_mark);
1009 value->be32 = htonl(flow->regs[mf->id - MFF_REG0]);
1013 memcpy(value->mac, flow->dl_src, ETH_ADDR_LEN);
1017 memcpy(value->mac, flow->dl_dst, ETH_ADDR_LEN);
1021 value->be16 = flow->dl_type;
1025 value->be16 = flow->vlan_tci;
1029 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK);
1032 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI);
1035 case MFF_DL_VLAN_PCP:
1037 value->u8 = vlan_tci_to_pcp(flow->vlan_tci);
1040 case MFF_MPLS_LABEL:
1041 value->be32 = htonl(mpls_lse_to_label(flow->mpls_lse));
1045 value->u8 = mpls_lse_to_tc(flow->mpls_lse);
1049 value->u8 = mpls_lse_to_bos(flow->mpls_lse);
1053 value->be32 = flow->nw_src;
1057 value->be32 = flow->nw_dst;
1061 value->ipv6 = flow->ipv6_src;
1065 value->ipv6 = flow->ipv6_dst;
1068 case MFF_IPV6_LABEL:
1069 value->be32 = flow->ipv6_label;
1073 value->u8 = flow->nw_proto;
1077 value->u8 = flow->nw_tos & IP_DSCP_MASK;
1080 case MFF_IP_DSCP_SHIFTED:
1081 value->u8 = flow->nw_tos >> 2;
1085 value->u8 = flow->nw_tos & IP_ECN_MASK;
1089 value->u8 = flow->nw_ttl;
1093 value->u8 = flow->nw_frag;
1097 value->be16 = htons(flow->nw_proto);
1101 value->be32 = flow->nw_src;
1105 value->be32 = flow->nw_dst;
1110 memcpy(value->mac, flow->arp_sha, ETH_ADDR_LEN);
1115 memcpy(value->mac, flow->arp_tha, ETH_ADDR_LEN);
1120 value->be16 = flow->tp_src;
1125 value->be16 = flow->tp_dst;
1128 case MFF_ICMPV4_TYPE:
1129 case MFF_ICMPV6_TYPE:
1130 value->u8 = ntohs(flow->tp_src);
1133 case MFF_ICMPV4_CODE:
1134 case MFF_ICMPV6_CODE:
1135 value->u8 = ntohs(flow->tp_dst);
1139 value->ipv6 = flow->nd_target;
1148 /* Makes 'match' match field 'mf' exactly, with the value matched taken from
1149 * 'value'. The caller is responsible for ensuring that 'match' meets 'mf''s
1152 mf_set_value(const struct mf_field *mf,
1153 const union mf_value *value, struct match *match)
1157 match_set_tun_id(match, value->be64);
1160 match_set_tun_src(match, value->be32);
1163 match_set_tun_dst(match, value->be32);
1166 match_set_tun_flags(match, ntohs(value->be16));
1169 match_set_tun_tos(match, value->u8);
1172 match_set_tun_ttl(match, value->u8);
1176 match_set_metadata(match, value->be64);
1180 match_set_in_port(match, ntohs(value->be16));
1183 case MFF_SKB_PRIORITY:
1184 match_set_skb_priority(match, ntohl(value->be32));
1188 match_set_skb_mark(match, ntohl(value->be32));
1192 match_set_reg(match, mf->id - MFF_REG0, ntohl(value->be32));
1196 match_set_dl_src(match, value->mac);
1200 match_set_dl_dst(match, value->mac);
1204 match_set_dl_type(match, value->be16);
1208 match_set_dl_tci(match, value->be16);
1212 match_set_dl_vlan(match, value->be16);
1215 match_set_vlan_vid(match, value->be16);
1218 case MFF_DL_VLAN_PCP:
1220 match_set_dl_vlan_pcp(match, value->u8);
1223 case MFF_MPLS_LABEL:
1224 match_set_mpls_label(match, value->be32);
1228 match_set_mpls_tc(match, value->u8);
1232 match_set_mpls_bos(match, value->u8);
1236 match_set_nw_src(match, value->be32);
1240 match_set_nw_dst(match, value->be32);
1244 match_set_ipv6_src(match, &value->ipv6);
1248 match_set_ipv6_dst(match, &value->ipv6);
1251 case MFF_IPV6_LABEL:
1252 match_set_ipv6_label(match, value->be32);
1256 match_set_nw_proto(match, value->u8);
1260 match_set_nw_dscp(match, value->u8);
1263 case MFF_IP_DSCP_SHIFTED:
1264 match_set_nw_dscp(match, value->u8 << 2);
1268 match_set_nw_ecn(match, value->u8);
1272 match_set_nw_ttl(match, value->u8);
1276 match_set_nw_frag(match, value->u8);
1280 match_set_nw_proto(match, ntohs(value->be16));
1284 match_set_nw_src(match, value->be32);
1288 match_set_nw_dst(match, value->be32);
1293 match_set_arp_sha(match, value->mac);
1298 match_set_arp_tha(match, value->mac);
1303 match_set_tp_src(match, value->be16);
1308 match_set_tp_dst(match, value->be16);
1311 case MFF_ICMPV4_TYPE:
1312 case MFF_ICMPV6_TYPE:
1313 match_set_icmp_type(match, value->u8);
1316 case MFF_ICMPV4_CODE:
1317 case MFF_ICMPV6_CODE:
1318 match_set_icmp_code(match, value->u8);
1322 match_set_nd_target(match, &value->ipv6);
1331 /* Makes 'match' match field 'mf' exactly, with the value matched taken from
1332 * 'value'. The caller is responsible for ensuring that 'match' meets 'mf''s
1335 mf_set_flow_value(const struct mf_field *mf,
1336 const union mf_value *value, struct flow *flow)
1340 flow->tunnel.tun_id = value->be64;
1343 flow->tunnel.ip_src = value->be32;
1346 flow->tunnel.ip_dst = value->be32;
1349 flow->tunnel.flags = ntohs(value->be16);
1352 flow->tunnel.ip_tos = value->u8;
1355 flow->tunnel.ip_ttl = value->u8;
1359 flow->metadata = value->be64;
1363 flow->in_port = ntohs(value->be16);
1366 case MFF_SKB_PRIORITY:
1367 flow->skb_priority = ntohl(value->be32);
1371 flow->skb_mark = ntohl(value->be32);
1375 flow->regs[mf->id - MFF_REG0] = ntohl(value->be32);
1379 memcpy(flow->dl_src, value->mac, ETH_ADDR_LEN);
1383 memcpy(flow->dl_dst, value->mac, ETH_ADDR_LEN);
1387 flow->dl_type = value->be16;
1391 flow->vlan_tci = value->be16;
1395 flow_set_dl_vlan(flow, value->be16);
1398 flow_set_vlan_vid(flow, value->be16);
1401 case MFF_DL_VLAN_PCP:
1403 flow_set_vlan_pcp(flow, value->u8);
1406 case MFF_MPLS_LABEL:
1407 flow_set_mpls_label(flow, value->be32);
1411 flow_set_mpls_tc(flow, value->u8);
1415 flow_set_mpls_bos(flow, value->u8);
1419 flow->nw_src = value->be32;
1423 flow->nw_dst = value->be32;
1427 flow->ipv6_src = value->ipv6;
1431 flow->ipv6_dst = value->ipv6;
1434 case MFF_IPV6_LABEL:
1435 flow->ipv6_label = value->be32 & ~htonl(IPV6_LABEL_MASK);
1439 flow->nw_proto = value->u8;
1443 flow->nw_tos &= ~IP_DSCP_MASK;
1444 flow->nw_tos |= value->u8 & IP_DSCP_MASK;
1447 case MFF_IP_DSCP_SHIFTED:
1448 flow->nw_tos &= ~IP_DSCP_MASK;
1449 flow->nw_tos |= value->u8 << 2;
1453 flow->nw_tos &= ~IP_ECN_MASK;
1454 flow->nw_tos |= value->u8 & IP_ECN_MASK;
1458 flow->nw_ttl = value->u8;
1462 flow->nw_frag &= value->u8;
1466 flow->nw_proto = ntohs(value->be16);
1470 flow->nw_src = value->be32;
1474 flow->nw_dst = value->be32;
1479 memcpy(flow->arp_sha, value->mac, ETH_ADDR_LEN);
1484 memcpy(flow->arp_tha, value->mac, ETH_ADDR_LEN);
1489 flow->tp_src = value->be16;
1494 flow->tp_dst = value->be16;
1497 case MFF_ICMPV4_TYPE:
1498 case MFF_ICMPV6_TYPE:
1499 flow->tp_src = htons(value->u8);
1502 case MFF_ICMPV4_CODE:
1503 case MFF_ICMPV6_CODE:
1504 flow->tp_dst = htons(value->u8);
1508 flow->nd_target = value->ipv6;
1517 /* Returns true if 'mf' has a zero value in 'flow', false if it is nonzero.
1519 * The caller is responsible for ensuring that 'flow' meets 'mf''s
1522 mf_is_zero(const struct mf_field *mf, const struct flow *flow)
1524 union mf_value value;
1526 mf_get_value(mf, flow, &value);
1527 return is_all_zeros((const uint8_t *) &value, mf->n_bytes);
1530 /* Makes 'match' wildcard field 'mf'.
1532 * The caller is responsible for ensuring that 'match' meets 'mf''s
1535 mf_set_wild(const struct mf_field *mf, struct match *match)
1539 match_set_tun_id_masked(match, htonll(0), htonll(0));
1542 match_set_tun_src_masked(match, htonl(0), htonl(0));
1545 match_set_tun_dst_masked(match, htonl(0), htonl(0));
1548 match_set_tun_flags_masked(match, 0, 0);
1551 match_set_tun_tos_masked(match, 0, 0);
1554 match_set_tun_ttl_masked(match, 0, 0);
1558 match_set_metadata_masked(match, htonll(0), htonll(0));
1562 match->flow.in_port = 0;
1563 match->wc.masks.in_port = 0;
1566 case MFF_SKB_PRIORITY:
1567 match->flow.skb_priority = 0;
1568 match->wc.masks.skb_priority = 0;
1572 match->flow.skb_mark = 0;
1573 match->wc.masks.skb_mark = 0;
1577 match_set_reg_masked(match, mf->id - MFF_REG0, 0, 0);
1581 memset(match->flow.dl_src, 0, ETH_ADDR_LEN);
1582 memset(match->wc.masks.dl_src, 0, ETH_ADDR_LEN);
1586 memset(match->flow.dl_dst, 0, ETH_ADDR_LEN);
1587 memset(match->wc.masks.dl_dst, 0, ETH_ADDR_LEN);
1591 match->flow.dl_type = htons(0);
1592 match->wc.masks.dl_type = htons(0);
1596 match_set_dl_tci_masked(match, htons(0), htons(0));
1601 match_set_any_vid(match);
1604 case MFF_DL_VLAN_PCP:
1606 match_set_any_pcp(match);
1609 case MFF_MPLS_LABEL:
1610 match_set_any_mpls_label(match);
1614 match_set_any_mpls_tc(match);
1618 match_set_any_mpls_bos(match);
1623 match_set_nw_src_masked(match, htonl(0), htonl(0));
1628 match_set_nw_dst_masked(match, htonl(0), htonl(0));
1632 memset(&match->wc.masks.ipv6_src, 0, sizeof match->wc.masks.ipv6_src);
1633 memset(&match->flow.ipv6_src, 0, sizeof match->flow.ipv6_src);
1637 memset(&match->wc.masks.ipv6_dst, 0, sizeof match->wc.masks.ipv6_dst);
1638 memset(&match->flow.ipv6_dst, 0, sizeof match->flow.ipv6_dst);
1641 case MFF_IPV6_LABEL:
1642 match->wc.masks.ipv6_label = htonl(0);
1643 match->flow.ipv6_label = htonl(0);
1647 match->wc.masks.nw_proto = 0;
1648 match->flow.nw_proto = 0;
1652 case MFF_IP_DSCP_SHIFTED:
1653 match->wc.masks.nw_tos &= ~IP_DSCP_MASK;
1654 match->flow.nw_tos &= ~IP_DSCP_MASK;
1658 match->wc.masks.nw_tos &= ~IP_ECN_MASK;
1659 match->flow.nw_tos &= ~IP_ECN_MASK;
1663 match->wc.masks.nw_ttl = 0;
1664 match->flow.nw_ttl = 0;
1668 match->wc.masks.nw_frag |= FLOW_NW_FRAG_MASK;
1669 match->flow.nw_frag &= ~FLOW_NW_FRAG_MASK;
1673 match->wc.masks.nw_proto = 0;
1674 match->flow.nw_proto = 0;
1679 memset(match->flow.arp_sha, 0, ETH_ADDR_LEN);
1680 memset(match->wc.masks.arp_sha, 0, ETH_ADDR_LEN);
1685 memset(match->flow.arp_tha, 0, ETH_ADDR_LEN);
1686 memset(match->wc.masks.arp_tha, 0, ETH_ADDR_LEN);
1691 case MFF_ICMPV4_TYPE:
1692 case MFF_ICMPV6_TYPE:
1693 match->wc.masks.tp_src = htons(0);
1694 match->flow.tp_src = htons(0);
1699 case MFF_ICMPV4_CODE:
1700 case MFF_ICMPV6_CODE:
1701 match->wc.masks.tp_dst = htons(0);
1702 match->flow.tp_dst = htons(0);
1706 memset(&match->wc.masks.nd_target, 0,
1707 sizeof match->wc.masks.nd_target);
1708 memset(&match->flow.nd_target, 0, sizeof match->flow.nd_target);
1717 /* Makes 'match' match field 'mf' with the specified 'value' and 'mask'.
1718 * 'value' specifies a value to match and 'mask' specifies a wildcard pattern,
1719 * with a 1-bit indicating that the corresponding value bit must match and a
1720 * 0-bit indicating a don't-care.
1722 * If 'mask' is NULL or points to all-1-bits, then this call is equivalent to
1723 * mf_set_value(mf, value, match). If 'mask' points to all-0-bits, then this
1724 * call is equivalent to mf_set_wild(mf, match).
1726 * 'mask' must be a valid mask for 'mf' (see mf_is_mask_valid()). The caller
1727 * is responsible for ensuring that 'match' meets 'mf''s prerequisites. */
1729 mf_set(const struct mf_field *mf,
1730 const union mf_value *value, const union mf_value *mask,
1731 struct match *match)
1733 if (!mask || is_all_ones((const uint8_t *) mask, mf->n_bytes)) {
1734 mf_set_value(mf, value, match);
1736 } else if (is_all_zeros((const uint8_t *) mask, mf->n_bytes)) {
1737 mf_set_wild(mf, match);
1744 case MFF_SKB_PRIORITY:
1747 case MFF_DL_VLAN_PCP:
1749 case MFF_MPLS_LABEL:
1755 case MFF_IP_DSCP_SHIFTED:
1758 case MFF_ICMPV4_TYPE:
1759 case MFF_ICMPV4_CODE:
1760 case MFF_ICMPV6_TYPE:
1761 case MFF_ICMPV6_CODE:
1765 match_set_tun_id_masked(match, value->be64, mask->be64);
1768 match_set_tun_src_masked(match, value->be32, mask->be32);
1771 match_set_tun_dst_masked(match, value->be32, mask->be32);
1774 match_set_tun_flags_masked(match, ntohs(value->be16), ntohs(mask->be16));
1777 match_set_tun_ttl_masked(match, value->u8, mask->u8);
1780 match_set_tun_tos_masked(match, value->u8, mask->u8);
1784 match_set_metadata_masked(match, value->be64, mask->be64);
1788 match_set_reg_masked(match, mf->id - MFF_REG0,
1789 ntohl(value->be32), ntohl(mask->be32));
1793 match_set_dl_dst_masked(match, value->mac, mask->mac);
1797 match_set_dl_src_masked(match, value->mac, mask->mac);
1802 match_set_arp_sha_masked(match, value->mac, mask->mac);
1807 match_set_arp_tha_masked(match, value->mac, mask->mac);
1811 match_set_dl_tci_masked(match, value->be16, mask->be16);
1815 match_set_vlan_vid_masked(match, value->be16, mask->be16);
1819 match_set_nw_src_masked(match, value->be32, mask->be32);
1823 match_set_nw_dst_masked(match, value->be32, mask->be32);
1827 match_set_ipv6_src_masked(match, &value->ipv6, &mask->ipv6);
1831 match_set_ipv6_dst_masked(match, &value->ipv6, &mask->ipv6);
1834 case MFF_IPV6_LABEL:
1835 if ((mask->be32 & htonl(IPV6_LABEL_MASK)) == htonl(IPV6_LABEL_MASK)) {
1836 mf_set_value(mf, value, match);
1838 match_set_ipv6_label_masked(match, value->be32, mask->be32);
1843 match_set_nd_target_masked(match, &value->ipv6, &mask->ipv6);
1847 match_set_nw_frag_masked(match, value->u8, mask->u8);
1851 match_set_nw_src_masked(match, value->be32, mask->be32);
1855 match_set_nw_dst_masked(match, value->be32, mask->be32);
1860 match_set_tp_src_masked(match, value->be16, mask->be16);
1865 match_set_tp_dst_masked(match, value->be16, mask->be16);
1875 mf_check__(const struct mf_subfield *sf, const struct flow *flow,
1879 VLOG_WARN_RL(&rl, "unknown %s field", type);
1880 } else if (!sf->n_bits) {
1881 VLOG_WARN_RL(&rl, "zero bit %s field %s", type, sf->field->name);
1882 } else if (sf->ofs >= sf->field->n_bits) {
1883 VLOG_WARN_RL(&rl, "bit offset %d exceeds %d-bit width of %s field %s",
1884 sf->ofs, sf->field->n_bits, type, sf->field->name);
1885 } else if (sf->ofs + sf->n_bits > sf->field->n_bits) {
1886 VLOG_WARN_RL(&rl, "bit offset %d and width %d exceeds %d-bit width "
1887 "of %s field %s", sf->ofs, sf->n_bits,
1888 sf->field->n_bits, type, sf->field->name);
1889 } else if (flow && !mf_are_prereqs_ok(sf->field, flow)) {
1890 VLOG_WARN_RL(&rl, "%s field %s lacks correct prerequisites",
1891 type, sf->field->name);
1896 return OFPERR_OFPBAC_BAD_ARGUMENT;
1899 /* Checks whether 'sf' is valid for reading a subfield out of 'flow'. Returns
1900 * 0 if so, otherwise an OpenFlow error code (e.g. as returned by
1903 mf_check_src(const struct mf_subfield *sf, const struct flow *flow)
1905 return mf_check__(sf, flow, "source");
1908 /* Checks whether 'sf' is valid for writing a subfield into 'flow'. Returns 0
1909 * if so, otherwise an OpenFlow error code (e.g. as returned by
1912 mf_check_dst(const struct mf_subfield *sf, const struct flow *flow)
1914 int error = mf_check__(sf, flow, "destination");
1915 if (!error && !sf->field->writable) {
1916 VLOG_WARN_RL(&rl, "destination field %s is not writable",
1918 return OFPERR_OFPBAC_BAD_ARGUMENT;
1923 /* Copies the value and wildcard bit pattern for 'mf' from 'match' into the
1924 * 'value' and 'mask', respectively. */
1926 mf_get(const struct mf_field *mf, const struct match *match,
1927 union mf_value *value, union mf_value *mask)
1929 mf_get_value(mf, &match->flow, value);
1930 mf_get_mask(mf, &match->wc, mask);
1933 /* Assigns a random value for field 'mf' to 'value'. */
1935 mf_random_value(const struct mf_field *mf, union mf_value *value)
1937 random_bytes(value, mf->n_bytes);
1949 case MFF_SKB_PRIORITY:
1969 case MFF_ICMPV4_TYPE:
1970 case MFF_ICMPV4_CODE:
1971 case MFF_ICMPV6_TYPE:
1972 case MFF_ICMPV6_CODE:
1978 case MFF_IPV6_LABEL:
1979 value->be32 &= ~htonl(IPV6_LABEL_MASK);
1983 value->u8 &= IP_DSCP_MASK;
1986 case MFF_IP_DSCP_SHIFTED:
1987 value->u8 &= IP_DSCP_MASK >> 2;
1991 value->u8 &= IP_ECN_MASK;
1995 value->u8 &= FLOW_NW_FRAG_MASK;
1999 value->be16 &= htons(0xff);
2003 value->be16 &= htons(VLAN_VID_MASK);
2006 value->be16 &= htons(VLAN_VID_MASK | VLAN_CFI);
2009 case MFF_DL_VLAN_PCP:
2014 case MFF_MPLS_LABEL:
2015 value->be32 &= htonl(MPLS_LABEL_MASK >> MPLS_LABEL_SHIFT);
2019 value->u8 &= MPLS_TC_MASK >> MPLS_TC_SHIFT;
2023 value->u8 &= MPLS_BOS_MASK >> MPLS_BOS_SHIFT;
2033 mf_from_integer_string(const struct mf_field *mf, const char *s,
2034 uint8_t *valuep, uint8_t *maskp)
2036 unsigned long long int integer, mask;
2041 integer = strtoull(s, &tail, 0);
2042 if (errno || (*tail != '\0' && *tail != '/')) {
2047 mask = strtoull(tail + 1, &tail, 0);
2048 if (errno || *tail != '\0') {
2055 for (i = mf->n_bytes - 1; i >= 0; i--) {
2056 valuep[i] = integer;
2062 return xasprintf("%s: value too large for %u-byte field %s",
2063 s, mf->n_bytes, mf->name);
2068 return xasprintf("%s: bad syntax for %s", s, mf->name);
2072 mf_from_ethernet_string(const struct mf_field *mf, const char *s,
2073 uint8_t mac[ETH_ADDR_LEN],
2074 uint8_t mask[ETH_ADDR_LEN])
2076 ovs_assert(mf->n_bytes == ETH_ADDR_LEN);
2078 switch (sscanf(s, ETH_ADDR_SCAN_FMT"/"ETH_ADDR_SCAN_FMT,
2079 ETH_ADDR_SCAN_ARGS(mac), ETH_ADDR_SCAN_ARGS(mask))){
2080 case ETH_ADDR_SCAN_COUNT * 2:
2083 case ETH_ADDR_SCAN_COUNT:
2084 memset(mask, 0xff, ETH_ADDR_LEN);
2088 return xasprintf("%s: invalid Ethernet address", s);
2093 mf_from_ipv4_string(const struct mf_field *mf, const char *s,
2094 ovs_be32 *ip, ovs_be32 *mask)
2098 ovs_assert(mf->n_bytes == sizeof *ip);
2100 if (sscanf(s, IP_SCAN_FMT"/"IP_SCAN_FMT,
2101 IP_SCAN_ARGS(ip), IP_SCAN_ARGS(mask)) == IP_SCAN_COUNT * 2) {
2103 } else if (sscanf(s, IP_SCAN_FMT"/%d",
2104 IP_SCAN_ARGS(ip), &prefix) == IP_SCAN_COUNT + 1) {
2105 if (prefix <= 0 || prefix > 32) {
2106 return xasprintf("%s: network prefix bits not between 1 and "
2108 } else if (prefix == 32) {
2109 *mask = htonl(UINT32_MAX);
2111 *mask = htonl(((1u << prefix) - 1) << (32 - prefix));
2113 } else if (sscanf(s, IP_SCAN_FMT, IP_SCAN_ARGS(ip)) == IP_SCAN_COUNT) {
2114 *mask = htonl(UINT32_MAX);
2116 return xasprintf("%s: invalid IP address", s);
2122 mf_from_ipv6_string(const struct mf_field *mf, const char *s,
2123 struct in6_addr *value, struct in6_addr *mask)
2125 char *str = xstrdup(s);
2126 char *save_ptr = NULL;
2127 const char *name, *netmask;
2130 ovs_assert(mf->n_bytes == sizeof *value);
2132 name = strtok_r(str, "/", &save_ptr);
2133 retval = name ? lookup_ipv6(name, value) : EINVAL;
2137 err = xasprintf("%s: could not convert to IPv6 address", str);
2143 netmask = strtok_r(NULL, "/", &save_ptr);
2145 if (inet_pton(AF_INET6, netmask, mask) != 1) {
2146 int prefix = atoi(netmask);
2147 if (prefix <= 0 || prefix > 128) {
2149 return xasprintf("%s: prefix bits not between 1 and 128", s);
2151 *mask = ipv6_create_mask(prefix);
2155 *mask = in6addr_exact;
2163 mf_from_ofp_port_string(const struct mf_field *mf, const char *s,
2164 ovs_be16 *valuep, ovs_be16 *maskp)
2168 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2170 return xasprintf("%s: negative values not supported for %s",
2172 } else if (ofputil_port_from_string(s, &port)) {
2173 *valuep = htons(port);
2174 *maskp = htons(UINT16_MAX);
2177 return mf_from_integer_string(mf, s,
2178 (uint8_t *) valuep, (uint8_t *) maskp);
2182 struct frag_handling {
2188 static const struct frag_handling all_frags[] = {
2189 #define A FLOW_NW_FRAG_ANY
2190 #define L FLOW_NW_FRAG_LATER
2191 /* name mask value */
2194 { "first", A|L, A },
2195 { "later", A|L, A|L },
2200 { "not_later", L, 0 },
2207 mf_from_frag_string(const char *s, uint8_t *valuep, uint8_t *maskp)
2209 const struct frag_handling *h;
2211 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2212 if (!strcasecmp(s, h->name)) {
2213 /* We force the upper bits of the mask on to make mf_parse_value()
2214 * happy (otherwise it will never think it's an exact match.) */
2215 *maskp = h->mask | ~FLOW_NW_FRAG_MASK;
2221 return xasprintf("%s: unknown fragment type (valid types are \"no\", "
2222 "\"yes\", \"first\", \"later\", \"not_first\"", s);
2226 parse_flow_tun_flags(const char *s_, const char *(*bit_to_string)(uint32_t),
2229 uint32_t result = 0;
2230 char *save_ptr = NULL;
2233 char *s = xstrdup(s_);
2235 for (name = strtok_r((char *)s, " |", &save_ptr); name;
2236 name = strtok_r(NULL, " |", &save_ptr)) {
2238 unsigned long long int flags;
2242 if (sscanf(name, "%lli%n", &flags, &n0) > 0 && n0 > 0) {
2246 name_len = strlen(name);
2247 for (bit = 1; bit; bit <<= 1) {
2248 const char *fname = bit_to_string(bit);
2255 len = strlen(fname);
2256 if (len != name_len) {
2259 if (!strncmp(name, fname, len)) {
2271 *res = htons(result);
2278 mf_from_tun_flags_string(const char *s, ovs_be16 *valuep, ovs_be16 *maskp)
2280 if (!parse_flow_tun_flags(s, flow_tun_flag_to_string, valuep)) {
2281 *maskp = htons(UINT16_MAX);
2285 return xasprintf("%s: unknown tunnel flags (valid flags are \"df\", "
2286 "\"csum\", \"key\"", s);
2289 /* Parses 's', a string value for field 'mf', into 'value' and 'mask'. Returns
2290 * NULL if successful, otherwise a malloc()'d string describing the error. */
2292 mf_parse(const struct mf_field *mf, const char *s,
2293 union mf_value *value, union mf_value *mask)
2295 if (!strcmp(s, "*")) {
2296 memset(value, 0, mf->n_bytes);
2297 memset(mask, 0, mf->n_bytes);
2301 switch (mf->string) {
2303 case MFS_HEXADECIMAL:
2304 return mf_from_integer_string(mf, s,
2305 (uint8_t *) value, (uint8_t *) mask);
2308 return mf_from_ethernet_string(mf, s, value->mac, mask->mac);
2311 return mf_from_ipv4_string(mf, s, &value->be32, &mask->be32);
2314 return mf_from_ipv6_string(mf, s, &value->ipv6, &mask->ipv6);
2317 return mf_from_ofp_port_string(mf, s, &value->be16, &mask->be16);
2320 return mf_from_frag_string(s, &value->u8, &mask->u8);
2323 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2324 return mf_from_tun_flags_string(s, &value->be16, &mask->be16);
2329 /* Parses 's', a string value for field 'mf', into 'value'. Returns NULL if
2330 * successful, otherwise a malloc()'d string describing the error. */
2332 mf_parse_value(const struct mf_field *mf, const char *s, union mf_value *value)
2334 union mf_value mask;
2337 error = mf_parse(mf, s, value, &mask);
2342 if (!is_all_ones((const uint8_t *) &mask, mf->n_bytes)) {
2343 return xasprintf("%s: wildcards not allowed here", s);
2349 mf_format_integer_string(const struct mf_field *mf, const uint8_t *valuep,
2350 const uint8_t *maskp, struct ds *s)
2352 unsigned long long int integer;
2355 ovs_assert(mf->n_bytes <= 8);
2358 for (i = 0; i < mf->n_bytes; i++) {
2359 integer = (integer << 8) | valuep[i];
2361 if (mf->string == MFS_HEXADECIMAL) {
2362 ds_put_format(s, "%#llx", integer);
2364 ds_put_format(s, "%lld", integer);
2368 unsigned long long int mask;
2371 for (i = 0; i < mf->n_bytes; i++) {
2372 mask = (mask << 8) | maskp[i];
2375 /* I guess we could write the mask in decimal for MFS_DECIMAL but I'm
2376 * not sure that that a bit-mask written in decimal is ever easier to
2377 * understand than the same bit-mask written in hexadecimal. */
2378 ds_put_format(s, "/%#llx", mask);
2383 mf_format_frag_string(uint8_t value, uint8_t mask, struct ds *s)
2385 const struct frag_handling *h;
2387 mask &= FLOW_NW_FRAG_MASK;
2390 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2391 if (value == h->value && mask == h->mask) {
2392 ds_put_cstr(s, h->name);
2396 ds_put_cstr(s, "<error>");
2400 mf_format_tnl_flags_string(const ovs_be16 *valuep, struct ds *s)
2402 format_flags(s, flow_tun_flag_to_string, ntohs(*valuep), '|');
2405 /* Appends to 's' a string representation of field 'mf' whose value is in
2406 * 'value' and 'mask'. 'mask' may be NULL to indicate an exact match. */
2408 mf_format(const struct mf_field *mf,
2409 const union mf_value *value, const union mf_value *mask,
2413 if (is_all_zeros((const uint8_t *) mask, mf->n_bytes)) {
2414 ds_put_cstr(s, "ANY");
2416 } else if (is_all_ones((const uint8_t *) mask, mf->n_bytes)) {
2421 switch (mf->string) {
2424 ofputil_format_port(ntohs(value->be16), s);
2429 case MFS_HEXADECIMAL:
2430 mf_format_integer_string(mf, (uint8_t *) value, (uint8_t *) mask, s);
2434 eth_format_masked(value->mac, mask->mac, s);
2438 ip_format_masked(value->be32, mask ? mask->be32 : htonl(UINT32_MAX),
2443 print_ipv6_masked(s, &value->ipv6, mask ? &mask->ipv6 : NULL);
2447 mf_format_frag_string(value->u8, mask ? mask->u8 : UINT8_MAX, s);
2451 mf_format_tnl_flags_string(&value->be16, s);
2459 /* Makes subfield 'sf' within 'flow' exactly match the 'sf->n_bits'
2460 * least-significant bits in 'x'.
2463 mf_write_subfield_flow(const struct mf_subfield *sf,
2464 const union mf_subvalue *x, struct flow *flow)
2466 const struct mf_field *field = sf->field;
2467 union mf_value value;
2469 mf_get_value(field, flow, &value);
2470 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes,
2471 sf->ofs, sf->n_bits);
2472 mf_set_flow_value(field, &value, flow);
2475 /* Makes subfield 'sf' within 'match' exactly match the 'sf->n_bits'
2476 * least-significant bits in 'x'.
2479 mf_write_subfield(const struct mf_subfield *sf, const union mf_subvalue *x,
2480 struct match *match)
2482 const struct mf_field *field = sf->field;
2483 union mf_value value, mask;
2485 mf_get(field, match, &value, &mask);
2486 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes, sf->ofs, sf->n_bits);
2487 bitwise_one ( &mask, field->n_bytes, sf->ofs, sf->n_bits);
2488 mf_set(field, &value, &mask, match);
2491 /* Initializes 'x' to the value of 'sf' within 'flow'. 'sf' must be valid for
2492 * reading 'flow', e.g. as checked by mf_check_src(). */
2494 mf_read_subfield(const struct mf_subfield *sf, const struct flow *flow,
2495 union mf_subvalue *x)
2497 union mf_value value;
2499 mf_get_value(sf->field, flow, &value);
2501 memset(x, 0, sizeof *x);
2502 bitwise_copy(&value, sf->field->n_bytes, sf->ofs,
2507 /* Returns the value of 'sf' within 'flow'. 'sf' must be valid for reading
2508 * 'flow', e.g. as checked by mf_check_src() and sf->n_bits must be 64 or
2511 mf_get_subfield(const struct mf_subfield *sf, const struct flow *flow)
2513 union mf_value value;
2515 mf_get_value(sf->field, flow, &value);
2516 return bitwise_get(&value, sf->field->n_bytes, sf->ofs, sf->n_bits);
2519 /* Formats 'sf' into 's' in a format normally acceptable to
2520 * mf_parse_subfield(). (It won't be acceptable if sf->field is NULL or if
2521 * sf->field has no NXM name.) */
2523 mf_format_subfield(const struct mf_subfield *sf, struct ds *s)
2526 ds_put_cstr(s, "<unknown>");
2527 } else if (sf->field->nxm_name) {
2528 ds_put_cstr(s, sf->field->nxm_name);
2529 } else if (sf->field->nxm_header) {
2530 uint32_t header = sf->field->nxm_header;
2531 ds_put_format(s, "%d:%d", NXM_VENDOR(header), NXM_FIELD(header));
2533 ds_put_cstr(s, sf->field->name);
2536 if (sf->field && sf->ofs == 0 && sf->n_bits == sf->field->n_bits) {
2537 ds_put_cstr(s, "[]");
2538 } else if (sf->n_bits == 1) {
2539 ds_put_format(s, "[%d]", sf->ofs);
2541 ds_put_format(s, "[%d..%d]", sf->ofs, sf->ofs + sf->n_bits - 1);
2545 static const struct mf_field *
2546 mf_parse_subfield_name(const char *name, int name_len, bool *wild)
2550 *wild = name_len > 2 && !memcmp(&name[name_len - 2], "_W", 2);
2555 for (i = 0; i < MFF_N_IDS; i++) {
2556 const struct mf_field *mf = mf_from_id(i);
2559 && !strncmp(mf->nxm_name, name, name_len)
2560 && mf->nxm_name[name_len] == '\0') {
2564 && !strncmp(mf->oxm_name, name, name_len)
2565 && mf->oxm_name[name_len] == '\0') {
2573 /* Parses a subfield from the beginning of '*sp' into 'sf'. If successful,
2574 * returns NULL and advances '*sp' to the first byte following the parsed
2575 * string. On failure, returns a malloc()'d error message, does not modify
2576 * '*sp', and does not properly initialize 'sf'.
2578 * The syntax parsed from '*sp' takes the form "header[start..end]" where
2579 * 'header' is the name of an NXM field and 'start' and 'end' are (inclusive)
2580 * bit indexes. "..end" may be omitted to indicate a single bit. "start..end"
2581 * may both be omitted (the [] are still required) to indicate an entire
2584 mf_parse_subfield__(struct mf_subfield *sf, const char **sp)
2586 const struct mf_field *field;
2595 name_len = strcspn(s, "[");
2596 if (s[name_len] != '[') {
2597 return xasprintf("%s: missing [ looking for field name", *sp);
2600 field = mf_parse_subfield_name(name, name_len, &wild);
2602 return xasprintf("%s: unknown field `%.*s'", *sp, name_len, s);
2606 if (sscanf(s, "[%d..%d]", &start, &end) == 2) {
2607 /* Nothing to do. */
2608 } else if (sscanf(s, "[%d]", &start) == 1) {
2610 } else if (!strncmp(s, "[]", 2)) {
2612 end = field->n_bits - 1;
2614 return xasprintf("%s: syntax error expecting [] or [<bit>] or "
2615 "[<start>..<end>]", *sp);
2617 s = strchr(s, ']') + 1;
2620 return xasprintf("%s: starting bit %d is after ending bit %d",
2622 } else if (start >= field->n_bits) {
2623 return xasprintf("%s: starting bit %d is not valid because field is "
2624 "only %d bits wide", *sp, start, field->n_bits);
2625 } else if (end >= field->n_bits){
2626 return xasprintf("%s: ending bit %d is not valid because field is "
2627 "only %d bits wide", *sp, end, field->n_bits);
2632 sf->n_bits = end - start + 1;
2638 /* Parses a subfield from the beginning of 's' into 'sf'. Returns the first
2639 * byte in 's' following the parsed string.
2641 * Exits with an error message if 's' has incorrect syntax.
2643 * The syntax parsed from 's' takes the form "header[start..end]" where
2644 * 'header' is the name of an NXM field and 'start' and 'end' are (inclusive)
2645 * bit indexes. "..end" may be omitted to indicate a single bit. "start..end"
2646 * may both be omitted (the [] are still required) to indicate an entire
2649 mf_parse_subfield(struct mf_subfield *sf, const char *s)
2651 char *msg = mf_parse_subfield__(sf, &s);
2653 ovs_fatal(0, "%s", msg);
2659 mf_format_subvalue(const union mf_subvalue *subvalue, struct ds *s)
2663 for (i = 0; i < ARRAY_SIZE(subvalue->u8); i++) {
2664 if (subvalue->u8[i]) {
2665 ds_put_format(s, "0x%"PRIx8, subvalue->u8[i]);
2666 for (i++; i < ARRAY_SIZE(subvalue->u8); i++) {
2667 ds_put_format(s, "%02"PRIx8, subvalue->u8[i]);
2672 ds_put_char(s, '0');