2 * Copyright (c) 2011, 2012, 2013, 2014, 2015 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"
29 #include "ofp-errors.h"
31 #include "ovs-thread.h"
35 #include "socket-util.h"
36 #include "tun-metadata.h"
37 #include "unaligned.h"
39 #include "openvswitch/vlog.h"
41 VLOG_DEFINE_THIS_MODULE(meta_flow);
43 #define FLOW_U32OFS(FIELD) \
44 offsetof(struct flow, FIELD) % 4 ? -1 : offsetof(struct flow, FIELD) / 4
46 #define MF_FIELD_SIZES(MEMBER) \
47 sizeof ((union mf_value *)0)->MEMBER, \
48 8 * sizeof ((union mf_value *)0)->MEMBER
50 extern const struct mf_field mf_fields[MFF_N_IDS]; /* Silence a warning. */
52 const struct mf_field mf_fields[MFF_N_IDS] = {
53 #include "meta-flow.inc"
56 /* Maps from an mf_field's 'name' or 'extra_name' to the mf_field. */
57 static struct shash mf_by_name;
59 /* Rate limit for parse errors. These always indicate a bug in an OpenFlow
60 * controller and so there's not much point in showing a lot of them. */
61 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
63 #define MF_VALUE_EXACT_8 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
64 #define MF_VALUE_EXACT_16 MF_VALUE_EXACT_8, MF_VALUE_EXACT_8
65 #define MF_VALUE_EXACT_32 MF_VALUE_EXACT_16, MF_VALUE_EXACT_16
66 #define MF_VALUE_EXACT_64 MF_VALUE_EXACT_32, MF_VALUE_EXACT_32
67 #define MF_VALUE_EXACT_128 MF_VALUE_EXACT_64, MF_VALUE_EXACT_64
68 #define MF_VALUE_EXACT_INITIALIZER { .tun_metadata = { MF_VALUE_EXACT_128 } }
70 const union mf_value exact_match_mask = MF_VALUE_EXACT_INITIALIZER;
72 static void nxm_init(void);
74 /* Returns the field with the given 'name', or a null pointer if no field has
76 const struct mf_field *
77 mf_from_name(const char *name)
80 return shash_find_data(&mf_by_name, name);
88 shash_init(&mf_by_name);
89 for (i = 0; i < MFF_N_IDS; i++) {
90 const struct mf_field *mf = &mf_fields[i];
92 ovs_assert(mf->id == i); /* Fields must be in the enum order. */
94 shash_add_once(&mf_by_name, mf->name, mf);
96 shash_add_once(&mf_by_name, mf->extra_name, mf);
104 static pthread_once_t once = PTHREAD_ONCE_INIT;
105 pthread_once(&once, nxm_do_init);
108 /* Consider the two value/mask pairs 'a_value/a_mask' and 'b_value/b_mask' as
109 * restrictions on a field's value. Then, this function initializes
110 * 'dst_value/dst_mask' such that it combines the restrictions of both pairs.
111 * This is not always possible, i.e. if one pair insists on a value of 0 in
112 * some bit and the other pair insists on a value of 1 in that bit. This
113 * function returns false in a case where the combined restriction is
114 * impossible (in which case 'dst_value/dst_mask' is not fully initialized),
117 * (As usually true for value/mask pairs in OVS, any 1-bit in a value must have
118 * a corresponding 1-bit in its mask.) */
120 mf_subvalue_intersect(const union mf_subvalue *a_value,
121 const union mf_subvalue *a_mask,
122 const union mf_subvalue *b_value,
123 const union mf_subvalue *b_mask,
124 union mf_subvalue *dst_value,
125 union mf_subvalue *dst_mask)
127 for (int i = 0; i < ARRAY_SIZE(a_value->be64); i++) {
128 ovs_be64 av = a_value->be64[i];
129 ovs_be64 am = a_mask->be64[i];
130 ovs_be64 bv = b_value->be64[i];
131 ovs_be64 bm = b_mask->be64[i];
132 ovs_be64 *dv = &dst_value->be64[i];
133 ovs_be64 *dm = &dst_mask->be64[i];
135 if ((av ^ bv) & (am & bm)) {
144 /* Returns the "number of bits" in 'v', e.g. 1 if only the lowest-order bit is
145 * set, 2 if the second-lowest-order bit is set, and so on. */
147 mf_subvalue_width(const union mf_subvalue *v)
149 return 1 + bitwise_rscan(v, sizeof *v, true, sizeof *v * 8 - 1, -1);
152 /* For positive 'n', shifts the bits in 'value' 'n' bits to the left, and for
153 * negative 'n', shifts the bits '-n' bits to the right. */
155 mf_subvalue_shift(union mf_subvalue *value, int n)
158 union mf_subvalue tmp;
159 memset(&tmp, 0, sizeof tmp);
161 if (n > 0 && n < 8 * sizeof tmp) {
162 bitwise_copy(value, sizeof *value, 0,
165 } else if (n < 0 && n > -8 * sizeof tmp) {
166 bitwise_copy(value, sizeof *value, -n,
174 /* Returns true if 'wc' wildcards all the bits in field 'mf', false if 'wc'
175 * specifies at least one bit in the field.
177 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
178 * meets 'mf''s prerequisites. */
180 mf_is_all_wild(const struct mf_field *mf, const struct flow_wildcards *wc)
184 return !wc->masks.dp_hash;
186 return !wc->masks.recirc_id;
188 return !wc->masks.conj_id;
190 return !wc->masks.tunnel.ip_src;
192 return !wc->masks.tunnel.ip_dst;
194 return !wc->masks.tunnel.tun_id;
196 return !wc->masks.tunnel.ip_tos;
198 return !wc->masks.tunnel.ip_ttl;
200 return !(wc->masks.tunnel.flags & FLOW_TNL_PUB_F_MASK);
202 return !wc->masks.tunnel.gbp_id;
203 case MFF_TUN_GBP_FLAGS:
204 return !wc->masks.tunnel.gbp_flags;
205 CASE_MFF_TUN_METADATA:
206 return !ULLONG_GET(wc->masks.tunnel.metadata.present.map,
207 mf->id - MFF_TUN_METADATA0);
209 return !wc->masks.metadata;
211 case MFF_IN_PORT_OXM:
212 return !wc->masks.in_port.ofp_port;
213 case MFF_SKB_PRIORITY:
214 return !wc->masks.skb_priority;
216 return !wc->masks.pkt_mark;
218 return !wc->masks.ct_state;
220 return !wc->masks.ct_zone;
222 return !wc->masks.regs[mf->id - MFF_REG0];
224 return !flow_get_xreg(&wc->masks, mf->id - MFF_XREG0);
225 case MFF_ACTSET_OUTPUT:
226 return !wc->masks.actset_output;
229 return eth_addr_is_zero(wc->masks.dl_src);
231 return eth_addr_is_zero(wc->masks.dl_dst);
233 return !wc->masks.dl_type;
237 return eth_addr_is_zero(wc->masks.arp_sha);
241 return eth_addr_is_zero(wc->masks.arp_tha);
244 return !wc->masks.vlan_tci;
246 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK));
248 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI));
249 case MFF_DL_VLAN_PCP:
251 return !(wc->masks.vlan_tci & htons(VLAN_PCP_MASK));
254 return !(wc->masks.mpls_lse[0] & htonl(MPLS_LABEL_MASK));
256 return !(wc->masks.mpls_lse[0] & htonl(MPLS_TC_MASK));
258 return !(wc->masks.mpls_lse[0] & htonl(MPLS_BOS_MASK));
261 return !wc->masks.nw_src;
263 return !wc->masks.nw_dst;
266 return ipv6_mask_is_any(&wc->masks.ipv6_src);
268 return ipv6_mask_is_any(&wc->masks.ipv6_dst);
271 return !wc->masks.ipv6_label;
274 return !wc->masks.nw_proto;
276 case MFF_IP_DSCP_SHIFTED:
277 return !(wc->masks.nw_tos & IP_DSCP_MASK);
279 return !(wc->masks.nw_tos & IP_ECN_MASK);
281 return !wc->masks.nw_ttl;
284 return ipv6_mask_is_any(&wc->masks.nd_target);
287 return !(wc->masks.nw_frag & FLOW_NW_FRAG_MASK);
290 return !wc->masks.nw_proto;
292 return !wc->masks.nw_src;
294 return !wc->masks.nw_dst;
299 case MFF_ICMPV4_TYPE:
300 case MFF_ICMPV6_TYPE:
301 return !wc->masks.tp_src;
305 case MFF_ICMPV4_CODE:
306 case MFF_ICMPV6_CODE:
307 return !wc->masks.tp_dst;
309 return !wc->masks.tcp_flags;
317 /* Initializes 'mask' with the wildcard bit pattern for field 'mf' within 'wc'.
318 * Each bit in 'mask' will be set to 1 if the bit is significant for matching
319 * purposes, or to 0 if it is wildcarded.
321 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
322 * meets 'mf''s prerequisites. */
324 mf_get_mask(const struct mf_field *mf, const struct flow_wildcards *wc,
325 union mf_value *mask)
327 mf_get_value(mf, &wc->masks, mask);
330 /* Tests whether 'mask' is a valid wildcard bit pattern for 'mf'. Returns true
331 * if the mask is valid, false otherwise. */
333 mf_is_mask_valid(const struct mf_field *mf, const union mf_value *mask)
335 switch (mf->maskable) {
337 return (is_all_zeros(mask, mf->n_bytes) ||
338 is_all_ones(mask, mf->n_bytes));
347 /* Returns true if 'flow' meets the prerequisites for 'mf', false otherwise. */
349 mf_are_prereqs_ok(const struct mf_field *mf, const struct flow *flow)
351 switch (mf->prereqs) {
356 return (flow->dl_type == htons(ETH_TYPE_ARP) ||
357 flow->dl_type == htons(ETH_TYPE_RARP));
359 return flow->dl_type == htons(ETH_TYPE_IP);
361 return flow->dl_type == htons(ETH_TYPE_IPV6);
363 return (flow->vlan_tci & htons(VLAN_CFI)) != 0;
365 return eth_type_mpls(flow->dl_type);
367 return is_ip_any(flow);
370 return is_ip_any(flow) && flow->nw_proto == IPPROTO_TCP
371 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
373 return is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP
374 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
376 return is_ip_any(flow) && flow->nw_proto == IPPROTO_SCTP
377 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
379 return is_icmpv4(flow);
381 return is_icmpv6(flow);
384 return (is_icmpv6(flow)
385 && flow->tp_dst == htons(0)
386 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
387 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
389 return (is_icmpv6(flow)
390 && flow->tp_dst == htons(0)
391 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)));
393 return (is_icmpv6(flow)
394 && flow->tp_dst == htons(0)
395 && (flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
401 /* Set field and it's prerequisities in the mask.
402 * This is only ever called for writeable 'mf's, but we do not make the
403 * distinction here. */
405 mf_mask_field_and_prereqs(const struct mf_field *mf, struct flow_wildcards *wc)
407 mf_set_flow_value(mf, &exact_match_mask, &wc->masks);
409 switch (mf->prereqs) {
413 WC_MASK_FIELD(wc, tp_src);
414 WC_MASK_FIELD(wc, tp_dst);
421 /* nw_frag always unwildcarded. */
422 WC_MASK_FIELD(wc, nw_proto);
429 /* dl_type always unwildcarded. */
432 WC_MASK_FIELD_MASK(wc, vlan_tci, htons(VLAN_CFI));
439 /* Set bits of 'bm' corresponding to the field 'mf' and it's prerequisities. */
441 mf_bitmap_set_field_and_prereqs(const struct mf_field *mf, struct mf_bitmap *bm)
443 bitmap_set1(bm->bm, mf->id);
445 switch (mf->prereqs) {
449 bitmap_set1(bm->bm, MFF_TCP_SRC);
450 bitmap_set1(bm->bm, MFF_TCP_DST);
457 /* nw_frag always unwildcarded. */
458 bitmap_set1(bm->bm, MFF_IP_PROTO);
465 bitmap_set1(bm->bm, MFF_ETH_TYPE);
468 bitmap_set1(bm->bm, MFF_VLAN_TCI);
475 /* Returns true if 'value' may be a valid value *as part of a masked match*,
478 * A value is not rejected just because it is not valid for the field in
479 * question, but only if it doesn't make sense to test the bits in question at
480 * all. For example, the MFF_VLAN_TCI field will never have a nonzero value
481 * without the VLAN_CFI bit being set, but we can't reject those values because
482 * it is still legitimate to test just for those bits (see the documentation
483 * for NXM_OF_VLAN_TCI in nicira-ext.h). On the other hand, there is never a
484 * reason to set the low bit of MFF_IP_DSCP to 1, so we reject that. */
486 mf_is_value_valid(const struct mf_field *mf, const union mf_value *value)
498 case MFF_TUN_GBP_FLAGS:
499 CASE_MFF_TUN_METADATA:
502 case MFF_SKB_PRIORITY:
527 case MFF_ICMPV4_TYPE:
528 case MFF_ICMPV4_CODE:
529 case MFF_ICMPV6_TYPE:
530 case MFF_ICMPV6_CODE:
536 case MFF_IN_PORT_OXM:
537 case MFF_ACTSET_OUTPUT: {
539 return !ofputil_port_from_ofp11(value->be32, &port);
543 return !(value->u8 & ~IP_DSCP_MASK);
544 case MFF_IP_DSCP_SHIFTED:
545 return !(value->u8 & (~IP_DSCP_MASK >> 2));
547 return !(value->u8 & ~IP_ECN_MASK);
549 return !(value->u8 & ~FLOW_NW_FRAG_MASK);
551 return !(value->be16 & ~htons(0x0fff));
554 return !(value->be16 & htons(0xff00));
557 return !(value->be16 & htons(VLAN_CFI | VLAN_PCP_MASK));
559 return !(value->be16 & htons(VLAN_PCP_MASK));
561 case MFF_DL_VLAN_PCP:
563 return !(value->u8 & ~(VLAN_PCP_MASK >> VLAN_PCP_SHIFT));
566 return !(value->be32 & ~htonl(IPV6_LABEL_MASK));
569 return !(value->be32 & ~htonl(MPLS_LABEL_MASK >> MPLS_LABEL_SHIFT));
572 return !(value->u8 & ~(MPLS_TC_MASK >> MPLS_TC_SHIFT));
575 return !(value->u8 & ~(MPLS_BOS_MASK >> MPLS_BOS_SHIFT));
578 return !(value->be16 & ~htons(FLOW_TNL_PUB_F_MASK));
581 return !(value->be32 & ~htonl(CS_SUPPORTED_MASK));
589 /* Copies the value of field 'mf' from 'flow' into 'value'. The caller is
590 * responsible for ensuring that 'flow' meets 'mf''s prerequisites. */
592 mf_get_value(const struct mf_field *mf, const struct flow *flow,
593 union mf_value *value)
597 value->be32 = htonl(flow->dp_hash);
600 value->be32 = htonl(flow->recirc_id);
603 value->be32 = htonl(flow->conj_id);
606 value->be64 = flow->tunnel.tun_id;
609 value->be32 = flow->tunnel.ip_src;
612 value->be32 = flow->tunnel.ip_dst;
615 value->be16 = htons(flow->tunnel.flags & FLOW_TNL_PUB_F_MASK);
618 value->be16 = flow->tunnel.gbp_id;
620 case MFF_TUN_GBP_FLAGS:
621 value->u8 = flow->tunnel.gbp_flags;
624 value->u8 = flow->tunnel.ip_ttl;
627 value->u8 = flow->tunnel.ip_tos;
629 CASE_MFF_TUN_METADATA:
630 tun_metadata_read(&flow->tunnel, mf, value);
634 value->be64 = flow->metadata;
638 value->be16 = htons(ofp_to_u16(flow->in_port.ofp_port));
640 case MFF_IN_PORT_OXM:
641 value->be32 = ofputil_port_to_ofp11(flow->in_port.ofp_port);
643 case MFF_ACTSET_OUTPUT:
644 value->be32 = ofputil_port_to_ofp11(flow->actset_output);
647 case MFF_SKB_PRIORITY:
648 value->be32 = htonl(flow->skb_priority);
652 value->be32 = htonl(flow->pkt_mark);
656 value->be32 = htonl(flow->ct_state);
660 value->be16 = htons(flow->ct_zone);
664 value->be32 = htonl(flow->regs[mf->id - MFF_REG0]);
668 value->be64 = htonll(flow_get_xreg(flow, mf->id - MFF_XREG0));
672 value->mac = flow->dl_src;
676 value->mac = flow->dl_dst;
680 value->be16 = flow->dl_type;
684 value->be16 = flow->vlan_tci;
688 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK);
691 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI);
694 case MFF_DL_VLAN_PCP:
696 value->u8 = vlan_tci_to_pcp(flow->vlan_tci);
700 value->be32 = htonl(mpls_lse_to_label(flow->mpls_lse[0]));
704 value->u8 = mpls_lse_to_tc(flow->mpls_lse[0]);
708 value->u8 = mpls_lse_to_bos(flow->mpls_lse[0]);
712 value->be32 = flow->nw_src;
716 value->be32 = flow->nw_dst;
720 value->ipv6 = flow->ipv6_src;
724 value->ipv6 = flow->ipv6_dst;
728 value->be32 = flow->ipv6_label;
732 value->u8 = flow->nw_proto;
736 value->u8 = flow->nw_tos & IP_DSCP_MASK;
739 case MFF_IP_DSCP_SHIFTED:
740 value->u8 = flow->nw_tos >> 2;
744 value->u8 = flow->nw_tos & IP_ECN_MASK;
748 value->u8 = flow->nw_ttl;
752 value->u8 = flow->nw_frag;
756 value->be16 = htons(flow->nw_proto);
760 value->be32 = flow->nw_src;
764 value->be32 = flow->nw_dst;
769 value->mac = flow->arp_sha;
774 value->mac = flow->arp_tha;
780 value->be16 = flow->tp_src;
786 value->be16 = flow->tp_dst;
790 value->be16 = flow->tcp_flags;
793 case MFF_ICMPV4_TYPE:
794 case MFF_ICMPV6_TYPE:
795 value->u8 = ntohs(flow->tp_src);
798 case MFF_ICMPV4_CODE:
799 case MFF_ICMPV6_CODE:
800 value->u8 = ntohs(flow->tp_dst);
804 value->ipv6 = flow->nd_target;
813 /* Makes 'match' match field 'mf' exactly, with the value matched taken from
814 * 'value'. The caller is responsible for ensuring that 'match' meets 'mf''s
817 * If non-NULL, 'err_str' returns a malloc'ed string describing any errors
818 * with the request or NULL if there is no error. The caller is reponsible
819 * for freeing the string. */
821 mf_set_value(const struct mf_field *mf,
822 const union mf_value *value, struct match *match, char **err_str)
830 match_set_dp_hash(match, ntohl(value->be32));
833 match_set_recirc_id(match, ntohl(value->be32));
836 match_set_conj_id(match, ntohl(value->be32));
839 match_set_tun_id(match, value->be64);
842 match_set_tun_src(match, value->be32);
845 match_set_tun_dst(match, value->be32);
848 match_set_tun_flags(match, ntohs(value->be16));
851 match_set_tun_gbp_id(match, value->be16);
853 case MFF_TUN_GBP_FLAGS:
854 match_set_tun_gbp_flags(match, value->u8);
857 match_set_tun_tos(match, value->u8);
860 match_set_tun_ttl(match, value->u8);
862 CASE_MFF_TUN_METADATA:
863 tun_metadata_set_match(mf, value, NULL, match, err_str);
867 match_set_metadata(match, value->be64);
871 match_set_in_port(match, u16_to_ofp(ntohs(value->be16)));
874 case MFF_IN_PORT_OXM: {
876 ofputil_port_from_ofp11(value->be32, &port);
877 match_set_in_port(match, port);
880 case MFF_ACTSET_OUTPUT: {
882 ofputil_port_from_ofp11(value->be32, &port);
883 match_set_actset_output(match, port);
887 case MFF_SKB_PRIORITY:
888 match_set_skb_priority(match, ntohl(value->be32));
892 match_set_pkt_mark(match, ntohl(value->be32));
896 match_set_ct_state(match, ntohl(value->be32));
900 match_set_ct_zone(match, ntohs(value->be16));
904 match_set_reg(match, mf->id - MFF_REG0, ntohl(value->be32));
908 match_set_xreg(match, mf->id - MFF_XREG0, ntohll(value->be64));
912 match_set_dl_src(match, value->mac);
916 match_set_dl_dst(match, value->mac);
920 match_set_dl_type(match, value->be16);
924 match_set_dl_tci(match, value->be16);
928 match_set_dl_vlan(match, value->be16);
931 match_set_vlan_vid(match, value->be16);
934 case MFF_DL_VLAN_PCP:
936 match_set_dl_vlan_pcp(match, value->u8);
940 match_set_mpls_label(match, 0, value->be32);
944 match_set_mpls_tc(match, 0, value->u8);
948 match_set_mpls_bos(match, 0, value->u8);
952 match_set_nw_src(match, value->be32);
956 match_set_nw_dst(match, value->be32);
960 match_set_ipv6_src(match, &value->ipv6);
964 match_set_ipv6_dst(match, &value->ipv6);
968 match_set_ipv6_label(match, value->be32);
972 match_set_nw_proto(match, value->u8);
976 match_set_nw_dscp(match, value->u8);
979 case MFF_IP_DSCP_SHIFTED:
980 match_set_nw_dscp(match, value->u8 << 2);
984 match_set_nw_ecn(match, value->u8);
988 match_set_nw_ttl(match, value->u8);
992 match_set_nw_frag(match, value->u8);
996 match_set_nw_proto(match, ntohs(value->be16));
1000 match_set_nw_src(match, value->be32);
1004 match_set_nw_dst(match, value->be32);
1009 match_set_arp_sha(match, value->mac);
1014 match_set_arp_tha(match, value->mac);
1020 match_set_tp_src(match, value->be16);
1026 match_set_tp_dst(match, value->be16);
1030 match_set_tcp_flags(match, value->be16);
1033 case MFF_ICMPV4_TYPE:
1034 case MFF_ICMPV6_TYPE:
1035 match_set_icmp_type(match, value->u8);
1038 case MFF_ICMPV4_CODE:
1039 case MFF_ICMPV6_CODE:
1040 match_set_icmp_code(match, value->u8);
1044 match_set_nd_target(match, &value->ipv6);
1053 /* Unwildcard 'mask' member field described by 'mf'. The caller is
1054 * responsible for ensuring that 'mask' meets 'mf''s prerequisites. */
1056 mf_mask_field(const struct mf_field *mf, struct flow *mask)
1058 /* For MFF_DL_VLAN, we cannot send a all 1's to flow_set_dl_vlan()
1059 * as that will be considered as OFP10_VLAN_NONE. So consider it as a
1060 * special case. For the rest, calling mf_set_flow_value() is good
1062 if (mf->id == MFF_DL_VLAN) {
1063 flow_set_dl_vlan(mask, htons(VLAN_VID_MASK));
1065 mf_set_flow_value(mf, &exact_match_mask, mask);
1070 field_len(const struct mf_field *mf, const union mf_value *value_)
1072 const uint8_t *value = &value_->u8;
1075 if (!mf->variable_len) {
1083 for (i = 0; i < mf->n_bytes; i++) {
1084 if (value[i] != 0) {
1089 return mf->n_bytes - i;
1092 /* Returns the effective length of the field. For fixed length fields,
1093 * this is just the defined length. For variable length fields, it is
1094 * the minimum size encoding that retains the same meaning (i.e.
1095 * discarding leading zeros).
1097 * 'is_masked' returns (if non-NULL) whether the original contained
1098 * a mask. Otherwise, a mask that is the same length as the value
1099 * might be misinterpreted as an exact match. */
1101 mf_field_len(const struct mf_field *mf, const union mf_value *value,
1102 const union mf_value *mask, bool *is_masked_)
1105 bool is_masked = mask && !is_all_ones(mask, mf->n_bytes);
1107 len = field_len(mf, value);
1109 mask_len = field_len(mf, mask);
1110 len = MAX(len, mask_len);
1114 *is_masked_ = is_masked;
1120 /* Sets 'flow' member field described by 'mf' to 'value'. The caller is
1121 * responsible for ensuring that 'flow' meets 'mf''s prerequisites.*/
1123 mf_set_flow_value(const struct mf_field *mf,
1124 const union mf_value *value, struct flow *flow)
1128 flow->dp_hash = ntohl(value->be32);
1131 flow->recirc_id = ntohl(value->be32);
1134 flow->conj_id = ntohl(value->be32);
1137 flow->tunnel.tun_id = value->be64;
1140 flow->tunnel.ip_src = value->be32;
1143 flow->tunnel.ip_dst = value->be32;
1146 flow->tunnel.flags = (flow->tunnel.flags & ~FLOW_TNL_PUB_F_MASK) |
1149 case MFF_TUN_GBP_ID:
1150 flow->tunnel.gbp_id = value->be16;
1152 case MFF_TUN_GBP_FLAGS:
1153 flow->tunnel.gbp_flags = value->u8;
1156 flow->tunnel.ip_tos = value->u8;
1159 flow->tunnel.ip_ttl = value->u8;
1161 CASE_MFF_TUN_METADATA:
1162 tun_metadata_write(&flow->tunnel, mf, value);
1165 flow->metadata = value->be64;
1169 flow->in_port.ofp_port = u16_to_ofp(ntohs(value->be16));
1172 case MFF_IN_PORT_OXM:
1173 ofputil_port_from_ofp11(value->be32, &flow->in_port.ofp_port);
1175 case MFF_ACTSET_OUTPUT:
1176 ofputil_port_from_ofp11(value->be32, &flow->actset_output);
1179 case MFF_SKB_PRIORITY:
1180 flow->skb_priority = ntohl(value->be32);
1184 flow->pkt_mark = ntohl(value->be32);
1188 flow->ct_state = ntohl(value->be32);
1192 flow->ct_zone = ntohs(value->be16);
1196 flow->regs[mf->id - MFF_REG0] = ntohl(value->be32);
1200 flow_set_xreg(flow, mf->id - MFF_XREG0, ntohll(value->be64));
1204 flow->dl_src = value->mac;
1208 flow->dl_dst = value->mac;
1212 flow->dl_type = value->be16;
1216 flow->vlan_tci = value->be16;
1220 flow_set_dl_vlan(flow, value->be16);
1223 flow_set_vlan_vid(flow, value->be16);
1226 case MFF_DL_VLAN_PCP:
1228 flow_set_vlan_pcp(flow, value->u8);
1231 case MFF_MPLS_LABEL:
1232 flow_set_mpls_label(flow, 0, value->be32);
1236 flow_set_mpls_tc(flow, 0, value->u8);
1240 flow_set_mpls_bos(flow, 0, value->u8);
1244 flow->nw_src = value->be32;
1248 flow->nw_dst = value->be32;
1252 flow->ipv6_src = value->ipv6;
1256 flow->ipv6_dst = value->ipv6;
1259 case MFF_IPV6_LABEL:
1260 flow->ipv6_label = value->be32 & htonl(IPV6_LABEL_MASK);
1264 flow->nw_proto = value->u8;
1268 flow->nw_tos &= ~IP_DSCP_MASK;
1269 flow->nw_tos |= value->u8 & IP_DSCP_MASK;
1272 case MFF_IP_DSCP_SHIFTED:
1273 flow->nw_tos &= ~IP_DSCP_MASK;
1274 flow->nw_tos |= value->u8 << 2;
1278 flow->nw_tos &= ~IP_ECN_MASK;
1279 flow->nw_tos |= value->u8 & IP_ECN_MASK;
1283 flow->nw_ttl = value->u8;
1287 flow->nw_frag = value->u8 & FLOW_NW_FRAG_MASK;
1291 flow->nw_proto = ntohs(value->be16);
1295 flow->nw_src = value->be32;
1299 flow->nw_dst = value->be32;
1304 flow->arp_sha = value->mac;
1309 flow->arp_tha = value->mac;
1315 flow->tp_src = value->be16;
1321 flow->tp_dst = value->be16;
1325 flow->tcp_flags = value->be16;
1328 case MFF_ICMPV4_TYPE:
1329 case MFF_ICMPV6_TYPE:
1330 flow->tp_src = htons(value->u8);
1333 case MFF_ICMPV4_CODE:
1334 case MFF_ICMPV6_CODE:
1335 flow->tp_dst = htons(value->u8);
1339 flow->nd_target = value->ipv6;
1348 /* Consider each of 'src', 'mask', and 'dst' as if they were arrays of 8*n
1349 * bits. Then, for each 0 <= i < 8 * n such that mask[i] == 1, sets dst[i] =
1352 apply_mask(const uint8_t *src, const uint8_t *mask, uint8_t *dst, size_t n)
1356 for (i = 0; i < n; i++) {
1357 dst[i] = (src[i] & mask[i]) | (dst[i] & ~mask[i]);
1361 /* Sets 'flow' member field described by 'field' to 'value', except that bits
1362 * for which 'mask' has a 0-bit keep their existing values. The caller is
1363 * responsible for ensuring that 'flow' meets 'field''s prerequisites.*/
1365 mf_set_flow_value_masked(const struct mf_field *field,
1366 const union mf_value *value,
1367 const union mf_value *mask,
1372 mf_get_value(field, flow, &tmp);
1373 apply_mask((const uint8_t *) value, (const uint8_t *) mask,
1374 (uint8_t *) &tmp, field->n_bytes);
1375 mf_set_flow_value(field, &tmp, flow);
1379 mf_is_tun_metadata(const struct mf_field *mf)
1381 return mf->id >= MFF_TUN_METADATA0 &&
1382 mf->id < MFF_TUN_METADATA0 + TUN_METADATA_NUM_OPTS;
1385 /* Returns true if 'mf' has previously been set in 'flow', false if
1386 * it contains a non-default value.
1388 * The caller is responsible for ensuring that 'flow' meets 'mf''s
1391 mf_is_set(const struct mf_field *mf, const struct flow *flow)
1393 if (!mf_is_tun_metadata(mf)) {
1394 union mf_value value;
1396 mf_get_value(mf, flow, &value);
1397 return !is_all_zeros(&value, mf->n_bytes);
1399 return ULLONG_GET(flow->tunnel.metadata.present.map,
1400 mf->id - MFF_TUN_METADATA0);
1404 /* Makes 'match' wildcard field 'mf'.
1406 * The caller is responsible for ensuring that 'match' meets 'mf''s
1409 * If non-NULL, 'err_str' returns a malloc'ed string describing any errors
1410 * with the request or NULL if there is no error. The caller is reponsible
1411 * for freeing the string. */
1413 mf_set_wild(const struct mf_field *mf, struct match *match, char **err_str)
1421 match->flow.dp_hash = 0;
1422 match->wc.masks.dp_hash = 0;
1425 match->flow.recirc_id = 0;
1426 match->wc.masks.recirc_id = 0;
1429 match->flow.conj_id = 0;
1430 match->wc.masks.conj_id = 0;
1433 match_set_tun_id_masked(match, htonll(0), htonll(0));
1436 match_set_tun_src_masked(match, htonl(0), htonl(0));
1439 match_set_tun_dst_masked(match, htonl(0), htonl(0));
1442 match_set_tun_flags_masked(match, 0, 0);
1444 case MFF_TUN_GBP_ID:
1445 match_set_tun_gbp_id_masked(match, 0, 0);
1447 case MFF_TUN_GBP_FLAGS:
1448 match_set_tun_gbp_flags_masked(match, 0, 0);
1451 match_set_tun_tos_masked(match, 0, 0);
1454 match_set_tun_ttl_masked(match, 0, 0);
1456 CASE_MFF_TUN_METADATA:
1457 tun_metadata_set_match(mf, NULL, NULL, match, err_str);
1461 match_set_metadata_masked(match, htonll(0), htonll(0));
1465 case MFF_IN_PORT_OXM:
1466 match->flow.in_port.ofp_port = 0;
1467 match->wc.masks.in_port.ofp_port = 0;
1469 case MFF_ACTSET_OUTPUT:
1470 match->flow.actset_output = 0;
1471 match->wc.masks.actset_output = 0;
1474 case MFF_SKB_PRIORITY:
1475 match->flow.skb_priority = 0;
1476 match->wc.masks.skb_priority = 0;
1480 match->flow.pkt_mark = 0;
1481 match->wc.masks.pkt_mark = 0;
1485 match->flow.ct_state = 0;
1486 match->wc.masks.ct_state = 0;
1490 match->flow.ct_zone = 0;
1491 match->wc.masks.ct_zone = 0;
1495 match_set_reg_masked(match, mf->id - MFF_REG0, 0, 0);
1499 match_set_xreg_masked(match, mf->id - MFF_XREG0, 0, 0);
1503 match->flow.dl_src = eth_addr_zero;
1504 match->wc.masks.dl_src = eth_addr_zero;
1508 match->flow.dl_dst = eth_addr_zero;
1509 match->wc.masks.dl_dst = eth_addr_zero;
1513 match->flow.dl_type = htons(0);
1514 match->wc.masks.dl_type = htons(0);
1518 match_set_dl_tci_masked(match, htons(0), htons(0));
1523 match_set_any_vid(match);
1526 case MFF_DL_VLAN_PCP:
1528 match_set_any_pcp(match);
1531 case MFF_MPLS_LABEL:
1532 match_set_any_mpls_label(match, 0);
1536 match_set_any_mpls_tc(match, 0);
1540 match_set_any_mpls_bos(match, 0);
1545 match_set_nw_src_masked(match, htonl(0), htonl(0));
1550 match_set_nw_dst_masked(match, htonl(0), htonl(0));
1554 memset(&match->wc.masks.ipv6_src, 0, sizeof match->wc.masks.ipv6_src);
1555 memset(&match->flow.ipv6_src, 0, sizeof match->flow.ipv6_src);
1559 memset(&match->wc.masks.ipv6_dst, 0, sizeof match->wc.masks.ipv6_dst);
1560 memset(&match->flow.ipv6_dst, 0, sizeof match->flow.ipv6_dst);
1563 case MFF_IPV6_LABEL:
1564 match->wc.masks.ipv6_label = htonl(0);
1565 match->flow.ipv6_label = htonl(0);
1569 match->wc.masks.nw_proto = 0;
1570 match->flow.nw_proto = 0;
1574 case MFF_IP_DSCP_SHIFTED:
1575 match->wc.masks.nw_tos &= ~IP_DSCP_MASK;
1576 match->flow.nw_tos &= ~IP_DSCP_MASK;
1580 match->wc.masks.nw_tos &= ~IP_ECN_MASK;
1581 match->flow.nw_tos &= ~IP_ECN_MASK;
1585 match->wc.masks.nw_ttl = 0;
1586 match->flow.nw_ttl = 0;
1590 match->wc.masks.nw_frag &= ~FLOW_NW_FRAG_MASK;
1591 match->flow.nw_frag &= ~FLOW_NW_FRAG_MASK;
1595 match->wc.masks.nw_proto = 0;
1596 match->flow.nw_proto = 0;
1601 match->flow.arp_sha = eth_addr_zero;
1602 match->wc.masks.arp_sha = eth_addr_zero;
1607 match->flow.arp_tha = eth_addr_zero;
1608 match->wc.masks.arp_tha = eth_addr_zero;
1614 case MFF_ICMPV4_TYPE:
1615 case MFF_ICMPV6_TYPE:
1616 match->wc.masks.tp_src = htons(0);
1617 match->flow.tp_src = htons(0);
1623 case MFF_ICMPV4_CODE:
1624 case MFF_ICMPV6_CODE:
1625 match->wc.masks.tp_dst = htons(0);
1626 match->flow.tp_dst = htons(0);
1630 match->wc.masks.tcp_flags = htons(0);
1631 match->flow.tcp_flags = htons(0);
1635 memset(&match->wc.masks.nd_target, 0,
1636 sizeof match->wc.masks.nd_target);
1637 memset(&match->flow.nd_target, 0, sizeof match->flow.nd_target);
1646 /* Makes 'match' match field 'mf' with the specified 'value' and 'mask'.
1647 * 'value' specifies a value to match and 'mask' specifies a wildcard pattern,
1648 * with a 1-bit indicating that the corresponding value bit must match and a
1649 * 0-bit indicating a don't-care.
1651 * If 'mask' is NULL or points to all-1-bits, then this call is equivalent to
1652 * mf_set_value(mf, value, match). If 'mask' points to all-0-bits, then this
1653 * call is equivalent to mf_set_wild(mf, match).
1655 * 'mask' must be a valid mask for 'mf' (see mf_is_mask_valid()). The caller
1656 * is responsible for ensuring that 'match' meets 'mf''s prerequisites.
1658 * If non-NULL, 'err_str' returns a malloc'ed string describing any errors
1659 * with the request or NULL if there is no error. The caller is reponsible
1660 * for freeing the string.
1662 * Return a set of enum ofputil_protocol bits (as an uint32_t to avoid circular
1663 * dependency on enum ofputil_protocol definition) indicating which OpenFlow
1664 * protocol versions can support this functionality. */
1666 mf_set(const struct mf_field *mf,
1667 const union mf_value *value, const union mf_value *mask,
1668 struct match *match, char **err_str)
1670 if (!mask || is_all_ones(mask, mf->n_bytes)) {
1671 mf_set_value(mf, value, match, err_str);
1672 return mf->usable_protocols_exact;
1673 } else if (is_all_zeros(mask, mf->n_bytes) && !mf_is_tun_metadata(mf)) {
1674 /* Tunnel metadata matches on the existence of the field itself, so
1675 * it still needs to be encoded even if the value is wildcarded. */
1676 mf_set_wild(mf, match, err_str);
1677 return OFPUTIL_P_ANY;
1689 case MFF_IN_PORT_OXM:
1690 case MFF_ACTSET_OUTPUT:
1691 case MFF_SKB_PRIORITY:
1694 case MFF_DL_VLAN_PCP:
1696 case MFF_MPLS_LABEL:
1702 case MFF_IP_DSCP_SHIFTED:
1705 case MFF_ICMPV4_TYPE:
1706 case MFF_ICMPV4_CODE:
1707 case MFF_ICMPV6_TYPE:
1708 case MFF_ICMPV6_CODE:
1709 return OFPUTIL_P_NONE;
1712 match_set_dp_hash_masked(match, ntohl(value->be32), ntohl(mask->be32));
1715 match_set_tun_id_masked(match, value->be64, mask->be64);
1718 match_set_tun_src_masked(match, value->be32, mask->be32);
1721 match_set_tun_dst_masked(match, value->be32, mask->be32);
1724 match_set_tun_flags_masked(match, ntohs(value->be16), ntohs(mask->be16));
1726 case MFF_TUN_GBP_ID:
1727 match_set_tun_gbp_id_masked(match, value->be16, mask->be16);
1729 case MFF_TUN_GBP_FLAGS:
1730 match_set_tun_gbp_flags_masked(match, value->u8, mask->u8);
1733 match_set_tun_ttl_masked(match, value->u8, mask->u8);
1736 match_set_tun_tos_masked(match, value->u8, mask->u8);
1738 CASE_MFF_TUN_METADATA:
1739 tun_metadata_set_match(mf, value, mask, match, err_str);
1743 match_set_metadata_masked(match, value->be64, mask->be64);
1747 match_set_reg_masked(match, mf->id - MFF_REG0,
1748 ntohl(value->be32), ntohl(mask->be32));
1752 match_set_xreg_masked(match, mf->id - MFF_XREG0,
1753 ntohll(value->be64), ntohll(mask->be64));
1757 match_set_pkt_mark_masked(match, ntohl(value->be32),
1762 match_set_ct_state_masked(match, ntohl(value->be32), ntohl(mask->be32));
1766 match_set_dl_dst_masked(match, value->mac, mask->mac);
1770 match_set_dl_src_masked(match, value->mac, mask->mac);
1775 match_set_arp_sha_masked(match, value->mac, mask->mac);
1780 match_set_arp_tha_masked(match, value->mac, mask->mac);
1784 match_set_dl_tci_masked(match, value->be16, mask->be16);
1788 match_set_vlan_vid_masked(match, value->be16, mask->be16);
1792 match_set_nw_src_masked(match, value->be32, mask->be32);
1796 match_set_nw_dst_masked(match, value->be32, mask->be32);
1800 match_set_ipv6_src_masked(match, &value->ipv6, &mask->ipv6);
1804 match_set_ipv6_dst_masked(match, &value->ipv6, &mask->ipv6);
1807 case MFF_IPV6_LABEL:
1808 if ((mask->be32 & htonl(IPV6_LABEL_MASK)) == htonl(IPV6_LABEL_MASK)) {
1809 mf_set_value(mf, value, match, err_str);
1811 match_set_ipv6_label_masked(match, value->be32, mask->be32);
1816 match_set_nd_target_masked(match, &value->ipv6, &mask->ipv6);
1820 match_set_nw_frag_masked(match, value->u8, mask->u8);
1824 match_set_nw_src_masked(match, value->be32, mask->be32);
1828 match_set_nw_dst_masked(match, value->be32, mask->be32);
1834 match_set_tp_src_masked(match, value->be16, mask->be16);
1840 match_set_tp_dst_masked(match, value->be16, mask->be16);
1844 match_set_tcp_flags_masked(match, value->be16, mask->be16);
1852 return ((mf->usable_protocols_bitwise == mf->usable_protocols_cidr
1853 || ip_is_cidr(mask->be32))
1854 ? mf->usable_protocols_cidr
1855 : mf->usable_protocols_bitwise);
1859 mf_check__(const struct mf_subfield *sf, const struct flow *flow,
1863 VLOG_WARN_RL(&rl, "unknown %s field", type);
1864 return OFPERR_OFPBAC_BAD_SET_TYPE;
1865 } else if (!sf->n_bits) {
1866 VLOG_WARN_RL(&rl, "zero bit %s field %s", type, sf->field->name);
1867 return OFPERR_OFPBAC_BAD_SET_LEN;
1868 } else if (sf->ofs >= sf->field->n_bits) {
1869 VLOG_WARN_RL(&rl, "bit offset %d exceeds %d-bit width of %s field %s",
1870 sf->ofs, sf->field->n_bits, type, sf->field->name);
1871 return OFPERR_OFPBAC_BAD_SET_LEN;
1872 } else if (sf->ofs + sf->n_bits > sf->field->n_bits) {
1873 VLOG_WARN_RL(&rl, "bit offset %d and width %d exceeds %d-bit width "
1874 "of %s field %s", sf->ofs, sf->n_bits,
1875 sf->field->n_bits, type, sf->field->name);
1876 return OFPERR_OFPBAC_BAD_SET_LEN;
1877 } else if (flow && !mf_are_prereqs_ok(sf->field, flow)) {
1878 VLOG_WARN_RL(&rl, "%s field %s lacks correct prerequisites",
1879 type, sf->field->name);
1880 return OFPERR_OFPBAC_MATCH_INCONSISTENT;
1886 /* Checks whether 'sf' is valid for reading a subfield out of 'flow'. Returns
1887 * 0 if so, otherwise an OpenFlow error code (e.g. as returned by
1890 mf_check_src(const struct mf_subfield *sf, const struct flow *flow)
1892 return mf_check__(sf, flow, "source");
1895 /* Checks whether 'sf' is valid for writing a subfield into 'flow'. Returns 0
1896 * if so, otherwise an OpenFlow error code (e.g. as returned by
1899 mf_check_dst(const struct mf_subfield *sf, const struct flow *flow)
1901 int error = mf_check__(sf, flow, "destination");
1902 if (!error && !sf->field->writable) {
1903 VLOG_WARN_RL(&rl, "destination field %s is not writable",
1905 return OFPERR_OFPBAC_BAD_SET_ARGUMENT;
1910 /* Copies the value and wildcard bit pattern for 'mf' from 'match' into the
1911 * 'value' and 'mask', respectively. */
1913 mf_get(const struct mf_field *mf, const struct match *match,
1914 union mf_value *value, union mf_value *mask)
1916 mf_get_value(mf, &match->flow, value);
1917 mf_get_mask(mf, &match->wc, mask);
1921 mf_from_integer_string(const struct mf_field *mf, const char *s,
1922 uint8_t *valuep, uint8_t *maskp)
1925 const char *err_str = "";
1928 err = parse_int_string(s, valuep, mf->n_bytes, &tail);
1929 if (err || (*tail != '\0' && *tail != '/')) {
1935 err = parse_int_string(tail + 1, maskp, mf->n_bytes, &tail);
1936 if (err || *tail != '\0') {
1941 memset(maskp, 0xff, mf->n_bytes);
1947 if (err == ERANGE) {
1948 return xasprintf("%s: %s too large for %u-byte field %s",
1949 s, err_str, mf->n_bytes, mf->name);
1951 return xasprintf("%s: bad syntax for %s %s", s, mf->name, err_str);
1956 mf_from_ethernet_string(const struct mf_field *mf, const char *s,
1957 struct eth_addr *mac, struct eth_addr *mask)
1961 ovs_assert(mf->n_bytes == ETH_ADDR_LEN);
1964 if (ovs_scan(s, ETH_ADDR_SCAN_FMT"%n", ETH_ADDR_SCAN_ARGS(*mac), &n)
1965 && n == strlen(s)) {
1966 *mask = eth_addr_exact;
1971 if (ovs_scan(s, ETH_ADDR_SCAN_FMT"/"ETH_ADDR_SCAN_FMT"%n",
1972 ETH_ADDR_SCAN_ARGS(*mac), ETH_ADDR_SCAN_ARGS(*mask), &n)
1973 && n == strlen(s)) {
1977 return xasprintf("%s: invalid Ethernet address", s);
1981 mf_from_ipv4_string(const struct mf_field *mf, const char *s,
1982 ovs_be32 *ip, ovs_be32 *mask)
1986 ovs_assert(mf->n_bytes == sizeof *ip);
1988 if (ovs_scan(s, IP_SCAN_FMT"/"IP_SCAN_FMT,
1989 IP_SCAN_ARGS(ip), IP_SCAN_ARGS(mask))) {
1991 } else if (ovs_scan(s, IP_SCAN_FMT"/%d", IP_SCAN_ARGS(ip), &prefix)) {
1992 if (prefix <= 0 || prefix > 32) {
1993 return xasprintf("%s: network prefix bits not between 0 and "
1996 *mask = be32_prefix_mask(prefix);
1997 } else if (ovs_scan(s, IP_SCAN_FMT, IP_SCAN_ARGS(ip))) {
1998 *mask = OVS_BE32_MAX;
2000 return xasprintf("%s: invalid IP address", s);
2006 mf_from_ipv6_string(const struct mf_field *mf, const char *s,
2007 struct in6_addr *value, struct in6_addr *mask)
2009 char *str = xstrdup(s);
2010 char *save_ptr = NULL;
2011 const char *name, *netmask;
2014 ovs_assert(mf->n_bytes == sizeof *value);
2016 name = strtok_r(str, "/", &save_ptr);
2017 retval = name ? lookup_ipv6(name, value) : EINVAL;
2021 err = xasprintf("%s: could not convert to IPv6 address", str);
2027 netmask = strtok_r(NULL, "/", &save_ptr);
2029 if (inet_pton(AF_INET6, netmask, mask) != 1) {
2030 int prefix = atoi(netmask);
2031 if (prefix <= 0 || prefix > 128) {
2033 return xasprintf("%s: prefix bits not between 1 and 128", s);
2035 *mask = ipv6_create_mask(prefix);
2039 *mask = in6addr_exact;
2047 mf_from_ofp_port_string(const struct mf_field *mf, const char *s,
2048 ovs_be16 *valuep, ovs_be16 *maskp)
2052 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2054 if (ofputil_port_from_string(s, &port)) {
2055 *valuep = htons(ofp_to_u16(port));
2056 *maskp = OVS_BE16_MAX;
2059 return xasprintf("%s: port value out of range for %s", s, mf->name);
2063 mf_from_ofp_port_string32(const struct mf_field *mf, const char *s,
2064 ovs_be32 *valuep, ovs_be32 *maskp)
2068 ovs_assert(mf->n_bytes == sizeof(ovs_be32));
2069 if (ofputil_port_from_string(s, &port)) {
2070 *valuep = ofputil_port_to_ofp11(port);
2071 *maskp = OVS_BE32_MAX;
2074 return xasprintf("%s: port value out of range for %s", s, mf->name);
2077 struct frag_handling {
2083 static const struct frag_handling all_frags[] = {
2084 #define A FLOW_NW_FRAG_ANY
2085 #define L FLOW_NW_FRAG_LATER
2086 /* name mask value */
2089 { "first", A|L, A },
2090 { "later", A|L, A|L },
2095 { "not_later", L, 0 },
2102 mf_from_frag_string(const char *s, uint8_t *valuep, uint8_t *maskp)
2104 const struct frag_handling *h;
2106 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2107 if (!strcasecmp(s, h->name)) {
2108 /* We force the upper bits of the mask on to make mf_parse_value()
2109 * happy (otherwise it will never think it's an exact match.) */
2110 *maskp = h->mask | ~FLOW_NW_FRAG_MASK;
2116 return xasprintf("%s: unknown fragment type (valid types are \"no\", "
2117 "\"yes\", \"first\", \"later\", \"not_first\"", s);
2121 parse_mf_flags(const char *s, const char *(*bit_to_string)(uint32_t),
2122 const char *field_name, ovs_be16 *flagsp, ovs_be16 allowed,
2127 uint32_t flags, mask;
2129 err = parse_flags(s, bit_to_string, '\0', field_name, &err_str,
2130 &flags, ntohs(allowed), maskp ? &mask : NULL);
2135 *flagsp = htons(flags);
2137 *maskp = htons(mask);
2144 mf_from_tcp_flags_string(const char *s, ovs_be16 *flagsp, ovs_be16 *maskp)
2146 return parse_mf_flags(s, packet_tcp_flag_to_string, "TCP", flagsp,
2147 TCP_FLAGS_BE16(OVS_BE16_MAX), maskp);
2151 mf_from_tun_flags_string(const char *s, ovs_be16 *flagsp, ovs_be16 *maskp)
2153 return parse_mf_flags(s, flow_tun_flag_to_string, "tunnel", flagsp,
2154 htons(FLOW_TNL_PUB_F_MASK), maskp);
2158 mf_from_ct_state_string(const char *s, ovs_be32 *flagsp, ovs_be32 *maskp)
2162 uint32_t flags, mask;
2164 err = parse_flags(s, ct_state_to_string, '\0', "ct_state", &err_str,
2165 &flags, CS_SUPPORTED_MASK, maskp ? &mask : NULL);
2170 *flagsp = htonl(flags);
2172 *maskp = htonl(mask);
2178 /* Parses 's', a string value for field 'mf', into 'value' and 'mask'. Returns
2179 * NULL if successful, otherwise a malloc()'d string describing the error. */
2181 mf_parse(const struct mf_field *mf, const char *s,
2182 union mf_value *value, union mf_value *mask)
2186 if (!strcmp(s, "*")) {
2187 memset(value, 0, mf->n_bytes);
2188 memset(mask, 0, mf->n_bytes);
2192 switch (mf->string) {
2194 case MFS_HEXADECIMAL:
2195 error = mf_from_integer_string(mf, s,
2196 (uint8_t *) value, (uint8_t *) mask);
2200 ovs_assert(mf->n_bytes == sizeof(ovs_be32));
2201 error = mf_from_ct_state_string(s, &value->be32, &mask->be32);
2205 error = mf_from_ethernet_string(mf, s, &value->mac, &mask->mac);
2209 error = mf_from_ipv4_string(mf, s, &value->be32, &mask->be32);
2213 error = mf_from_ipv6_string(mf, s, &value->ipv6, &mask->ipv6);
2217 error = mf_from_ofp_port_string(mf, s, &value->be16, &mask->be16);
2220 case MFS_OFP_PORT_OXM:
2221 error = mf_from_ofp_port_string32(mf, s, &value->be32, &mask->be32);
2225 error = mf_from_frag_string(s, &value->u8, &mask->u8);
2229 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2230 error = mf_from_tun_flags_string(s, &value->be16, &mask->be16);
2234 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2235 error = mf_from_tcp_flags_string(s, &value->be16, &mask->be16);
2242 if (!error && !mf_is_mask_valid(mf, mask)) {
2243 error = xasprintf("%s: invalid mask for field %s", s, mf->name);
2248 /* Parses 's', a string value for field 'mf', into 'value'. Returns NULL if
2249 * successful, otherwise a malloc()'d string describing the error. */
2251 mf_parse_value(const struct mf_field *mf, const char *s, union mf_value *value)
2253 union mf_value mask;
2256 error = mf_parse(mf, s, value, &mask);
2261 if (!is_all_ones((const uint8_t *) &mask, mf->n_bytes)) {
2262 return xasprintf("%s: wildcards not allowed here", s);
2268 mf_format_integer_string(const struct mf_field *mf, const uint8_t *valuep,
2269 const uint8_t *maskp, struct ds *s)
2271 if (mf->string == MFS_HEXADECIMAL) {
2272 ds_put_hex(s, valuep, mf->n_bytes);
2274 unsigned long long int integer = 0;
2277 ovs_assert(mf->n_bytes <= 8);
2278 for (i = 0; i < mf->n_bytes; i++) {
2279 integer = (integer << 8) | valuep[i];
2281 ds_put_format(s, "%lld", integer);
2285 /* I guess we could write the mask in decimal for MFS_DECIMAL but I'm
2286 * not sure that that a bit-mask written in decimal is ever easier to
2287 * understand than the same bit-mask written in hexadecimal. */
2288 ds_put_char(s, '/');
2289 ds_put_hex(s, maskp, mf->n_bytes);
2294 mf_format_frag_string(uint8_t value, uint8_t mask, struct ds *s)
2296 const struct frag_handling *h;
2298 mask &= FLOW_NW_FRAG_MASK;
2301 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2302 if (value == h->value && mask == h->mask) {
2303 ds_put_cstr(s, h->name);
2307 ds_put_cstr(s, "<error>");
2311 mf_format_tnl_flags_string(ovs_be16 value, ovs_be16 mask, struct ds *s)
2313 format_flags_masked(s, NULL, flow_tun_flag_to_string, ntohs(value),
2314 ntohs(mask) & FLOW_TNL_PUB_F_MASK, FLOW_TNL_PUB_F_MASK);
2318 mf_format_tcp_flags_string(ovs_be16 value, ovs_be16 mask, struct ds *s)
2320 format_flags_masked(s, NULL, packet_tcp_flag_to_string, ntohs(value),
2321 TCP_FLAGS(mask), TCP_FLAGS(OVS_BE16_MAX));
2325 mf_format_ct_state_string(ovs_be32 value, ovs_be32 mask, struct ds *s)
2327 format_flags_masked(s, NULL, ct_state_to_string, ntohl(value),
2328 ntohl(mask), UINT16_MAX);
2331 /* Appends to 's' a string representation of field 'mf' whose value is in
2332 * 'value' and 'mask'. 'mask' may be NULL to indicate an exact match. */
2334 mf_format(const struct mf_field *mf,
2335 const union mf_value *value, const union mf_value *mask,
2339 if (is_all_zeros(mask, mf->n_bytes)) {
2340 ds_put_cstr(s, "ANY");
2342 } else if (is_all_ones(mask, mf->n_bytes)) {
2347 switch (mf->string) {
2348 case MFS_OFP_PORT_OXM:
2351 ofputil_port_from_ofp11(value->be32, &port);
2352 ofputil_format_port(port, s);
2358 ofputil_format_port(u16_to_ofp(ntohs(value->be16)), s);
2363 case MFS_HEXADECIMAL:
2364 mf_format_integer_string(mf, (uint8_t *) value, (uint8_t *) mask, s);
2368 mf_format_ct_state_string(value->be32,
2369 mask ? mask->be32 : OVS_BE32_MAX, s);
2373 eth_format_masked(value->mac, mask ? &mask->mac : NULL, s);
2377 ip_format_masked(value->be32, mask ? mask->be32 : OVS_BE32_MAX, s);
2381 print_ipv6_masked(s, &value->ipv6, mask ? &mask->ipv6 : NULL);
2385 mf_format_frag_string(value->u8, mask ? mask->u8 : UINT8_MAX, s);
2389 mf_format_tnl_flags_string(value->be16,
2390 mask ? mask->be16 : OVS_BE16_MAX, s);
2394 mf_format_tcp_flags_string(value->be16,
2395 mask ? mask->be16 : OVS_BE16_MAX, s);
2403 /* Makes subfield 'sf' within 'flow' exactly match the 'sf->n_bits'
2404 * least-significant bits in 'x'.
2407 mf_write_subfield_flow(const struct mf_subfield *sf,
2408 const union mf_subvalue *x, struct flow *flow)
2410 const struct mf_field *field = sf->field;
2411 union mf_value value;
2413 mf_get_value(field, flow, &value);
2414 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes,
2415 sf->ofs, sf->n_bits);
2416 mf_set_flow_value(field, &value, flow);
2419 /* Makes subfield 'sf' within 'match' exactly match the 'sf->n_bits'
2420 * least-significant bits in 'x'.
2423 mf_write_subfield(const struct mf_subfield *sf, const union mf_subvalue *x,
2424 struct match *match)
2426 const struct mf_field *field = sf->field;
2427 union mf_value value, mask;
2429 mf_get(field, match, &value, &mask);
2430 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes, sf->ofs, sf->n_bits);
2431 bitwise_one ( &mask, field->n_bytes, sf->ofs, sf->n_bits);
2432 mf_set(field, &value, &mask, match, NULL);
2435 /* 'v' and 'm' correspond to values of 'field'. This function copies them into
2436 * 'match' in the correspond positions. */
2438 mf_mask_subfield(const struct mf_field *field,
2439 const union mf_subvalue *v,
2440 const union mf_subvalue *m,
2441 struct match *match)
2443 union mf_value value, mask;
2445 mf_get(field, match, &value, &mask);
2446 bitwise_copy(v, sizeof *v, 0, &value, field->n_bytes, 0, field->n_bits);
2447 bitwise_copy(m, sizeof *m, 0, &mask, field->n_bytes, 0, field->n_bits);
2448 mf_set(field, &value, &mask, match, NULL);
2451 /* Initializes 'x' to the value of 'sf' within 'flow'. 'sf' must be valid for
2452 * reading 'flow', e.g. as checked by mf_check_src(). */
2454 mf_read_subfield(const struct mf_subfield *sf, const struct flow *flow,
2455 union mf_subvalue *x)
2457 union mf_value value;
2459 mf_get_value(sf->field, flow, &value);
2461 memset(x, 0, sizeof *x);
2462 bitwise_copy(&value, sf->field->n_bytes, sf->ofs,
2467 /* Returns the value of 'sf' within 'flow'. 'sf' must be valid for reading
2468 * 'flow', e.g. as checked by mf_check_src() and sf->n_bits must be 64 or
2471 mf_get_subfield(const struct mf_subfield *sf, const struct flow *flow)
2473 union mf_value value;
2475 mf_get_value(sf->field, flow, &value);
2476 return bitwise_get(&value, sf->field->n_bytes, sf->ofs, sf->n_bits);
2480 mf_format_subvalue(const union mf_subvalue *subvalue, struct ds *s)
2482 ds_put_hex(s, subvalue->u8, sizeof subvalue->u8);
2486 field_array_set(enum mf_field_id id, const union mf_value *value,
2487 struct field_array *fa)
2489 ovs_assert(id < MFF_N_IDS);
2490 bitmap_set1(fa->used.bm, id);
2491 fa->value[id] = *value;