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.ct_mark;
224 return ovs_u128_is_zero(&wc->masks.ct_label);
226 return !wc->masks.regs[mf->id - MFF_REG0];
228 return !flow_get_xreg(&wc->masks, mf->id - MFF_XREG0);
229 case MFF_ACTSET_OUTPUT:
230 return !wc->masks.actset_output;
233 return eth_addr_is_zero(wc->masks.dl_src);
235 return eth_addr_is_zero(wc->masks.dl_dst);
237 return !wc->masks.dl_type;
241 return eth_addr_is_zero(wc->masks.arp_sha);
245 return eth_addr_is_zero(wc->masks.arp_tha);
248 return !wc->masks.vlan_tci;
250 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK));
252 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI));
253 case MFF_DL_VLAN_PCP:
255 return !(wc->masks.vlan_tci & htons(VLAN_PCP_MASK));
258 return !(wc->masks.mpls_lse[0] & htonl(MPLS_LABEL_MASK));
260 return !(wc->masks.mpls_lse[0] & htonl(MPLS_TC_MASK));
262 return !(wc->masks.mpls_lse[0] & htonl(MPLS_BOS_MASK));
265 return !wc->masks.nw_src;
267 return !wc->masks.nw_dst;
270 return ipv6_mask_is_any(&wc->masks.ipv6_src);
272 return ipv6_mask_is_any(&wc->masks.ipv6_dst);
275 return !wc->masks.ipv6_label;
278 return !wc->masks.nw_proto;
280 case MFF_IP_DSCP_SHIFTED:
281 return !(wc->masks.nw_tos & IP_DSCP_MASK);
283 return !(wc->masks.nw_tos & IP_ECN_MASK);
285 return !wc->masks.nw_ttl;
288 return ipv6_mask_is_any(&wc->masks.nd_target);
291 return !(wc->masks.nw_frag & FLOW_NW_FRAG_MASK);
294 return !wc->masks.nw_proto;
296 return !wc->masks.nw_src;
298 return !wc->masks.nw_dst;
303 case MFF_ICMPV4_TYPE:
304 case MFF_ICMPV6_TYPE:
305 return !wc->masks.tp_src;
309 case MFF_ICMPV4_CODE:
310 case MFF_ICMPV6_CODE:
311 return !wc->masks.tp_dst;
313 return !wc->masks.tcp_flags;
321 /* Initializes 'mask' with the wildcard bit pattern for field 'mf' within 'wc'.
322 * Each bit in 'mask' will be set to 1 if the bit is significant for matching
323 * purposes, or to 0 if it is wildcarded.
325 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
326 * meets 'mf''s prerequisites. */
328 mf_get_mask(const struct mf_field *mf, const struct flow_wildcards *wc,
329 union mf_value *mask)
331 mf_get_value(mf, &wc->masks, mask);
334 /* Tests whether 'mask' is a valid wildcard bit pattern for 'mf'. Returns true
335 * if the mask is valid, false otherwise. */
337 mf_is_mask_valid(const struct mf_field *mf, const union mf_value *mask)
339 switch (mf->maskable) {
341 return (is_all_zeros(mask, mf->n_bytes) ||
342 is_all_ones(mask, mf->n_bytes));
351 /* Returns true if 'flow' meets the prerequisites for 'mf', false otherwise. */
353 mf_are_prereqs_ok(const struct mf_field *mf, const struct flow *flow)
355 switch (mf->prereqs) {
360 return (flow->dl_type == htons(ETH_TYPE_ARP) ||
361 flow->dl_type == htons(ETH_TYPE_RARP));
363 return flow->dl_type == htons(ETH_TYPE_IP);
365 return flow->dl_type == htons(ETH_TYPE_IPV6);
367 return (flow->vlan_tci & htons(VLAN_CFI)) != 0;
369 return eth_type_mpls(flow->dl_type);
371 return is_ip_any(flow);
374 return is_ip_any(flow) && flow->nw_proto == IPPROTO_TCP
375 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
377 return is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP
378 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
380 return is_ip_any(flow) && flow->nw_proto == IPPROTO_SCTP
381 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
383 return is_icmpv4(flow);
385 return is_icmpv6(flow);
388 return (is_icmpv6(flow)
389 && flow->tp_dst == htons(0)
390 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
391 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
393 return (is_icmpv6(flow)
394 && flow->tp_dst == htons(0)
395 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)));
397 return (is_icmpv6(flow)
398 && flow->tp_dst == htons(0)
399 && (flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
405 /* Set field and it's prerequisities in the mask.
406 * This is only ever called for writeable 'mf's, but we do not make the
407 * distinction here. */
409 mf_mask_field_and_prereqs(const struct mf_field *mf, struct flow_wildcards *wc)
411 mf_set_flow_value(mf, &exact_match_mask, &wc->masks);
413 switch (mf->prereqs) {
417 WC_MASK_FIELD(wc, tp_src);
418 WC_MASK_FIELD(wc, tp_dst);
425 /* nw_frag always unwildcarded. */
426 WC_MASK_FIELD(wc, nw_proto);
433 /* dl_type always unwildcarded. */
436 WC_MASK_FIELD_MASK(wc, vlan_tci, htons(VLAN_CFI));
443 /* Set bits of 'bm' corresponding to the field 'mf' and it's prerequisities. */
445 mf_bitmap_set_field_and_prereqs(const struct mf_field *mf, struct mf_bitmap *bm)
447 bitmap_set1(bm->bm, mf->id);
449 switch (mf->prereqs) {
453 bitmap_set1(bm->bm, MFF_TCP_SRC);
454 bitmap_set1(bm->bm, MFF_TCP_DST);
461 /* nw_frag always unwildcarded. */
462 bitmap_set1(bm->bm, MFF_IP_PROTO);
469 bitmap_set1(bm->bm, MFF_ETH_TYPE);
472 bitmap_set1(bm->bm, MFF_VLAN_TCI);
479 /* Returns true if 'value' may be a valid value *as part of a masked match*,
482 * A value is not rejected just because it is not valid for the field in
483 * question, but only if it doesn't make sense to test the bits in question at
484 * all. For example, the MFF_VLAN_TCI field will never have a nonzero value
485 * without the VLAN_CFI bit being set, but we can't reject those values because
486 * it is still legitimate to test just for those bits (see the documentation
487 * for NXM_OF_VLAN_TCI in nicira-ext.h). On the other hand, there is never a
488 * reason to set the low bit of MFF_IP_DSCP to 1, so we reject that. */
490 mf_is_value_valid(const struct mf_field *mf, const union mf_value *value)
502 case MFF_TUN_GBP_FLAGS:
503 CASE_MFF_TUN_METADATA:
506 case MFF_SKB_PRIORITY:
533 case MFF_ICMPV4_TYPE:
534 case MFF_ICMPV4_CODE:
535 case MFF_ICMPV6_TYPE:
536 case MFF_ICMPV6_CODE:
542 case MFF_IN_PORT_OXM:
543 case MFF_ACTSET_OUTPUT: {
545 return !ofputil_port_from_ofp11(value->be32, &port);
549 return !(value->u8 & ~IP_DSCP_MASK);
550 case MFF_IP_DSCP_SHIFTED:
551 return !(value->u8 & (~IP_DSCP_MASK >> 2));
553 return !(value->u8 & ~IP_ECN_MASK);
555 return !(value->u8 & ~FLOW_NW_FRAG_MASK);
557 return !(value->be16 & ~htons(0x0fff));
560 return !(value->be16 & htons(0xff00));
563 return !(value->be16 & htons(VLAN_CFI | VLAN_PCP_MASK));
565 return !(value->be16 & htons(VLAN_PCP_MASK));
567 case MFF_DL_VLAN_PCP:
569 return !(value->u8 & ~(VLAN_PCP_MASK >> VLAN_PCP_SHIFT));
572 return !(value->be32 & ~htonl(IPV6_LABEL_MASK));
575 return !(value->be32 & ~htonl(MPLS_LABEL_MASK >> MPLS_LABEL_SHIFT));
578 return !(value->u8 & ~(MPLS_TC_MASK >> MPLS_TC_SHIFT));
581 return !(value->u8 & ~(MPLS_BOS_MASK >> MPLS_BOS_SHIFT));
584 return !(value->be16 & ~htons(FLOW_TNL_PUB_F_MASK));
587 return !(value->be32 & ~htonl(CS_SUPPORTED_MASK));
595 /* Copies the value of field 'mf' from 'flow' into 'value'. The caller is
596 * responsible for ensuring that 'flow' meets 'mf''s prerequisites. */
598 mf_get_value(const struct mf_field *mf, const struct flow *flow,
599 union mf_value *value)
603 value->be32 = htonl(flow->dp_hash);
606 value->be32 = htonl(flow->recirc_id);
609 value->be32 = htonl(flow->conj_id);
612 value->be64 = flow->tunnel.tun_id;
615 value->be32 = flow->tunnel.ip_src;
618 value->be32 = flow->tunnel.ip_dst;
621 value->be16 = htons(flow->tunnel.flags & FLOW_TNL_PUB_F_MASK);
624 value->be16 = flow->tunnel.gbp_id;
626 case MFF_TUN_GBP_FLAGS:
627 value->u8 = flow->tunnel.gbp_flags;
630 value->u8 = flow->tunnel.ip_ttl;
633 value->u8 = flow->tunnel.ip_tos;
635 CASE_MFF_TUN_METADATA:
636 tun_metadata_read(&flow->tunnel, mf, value);
640 value->be64 = flow->metadata;
644 value->be16 = htons(ofp_to_u16(flow->in_port.ofp_port));
646 case MFF_IN_PORT_OXM:
647 value->be32 = ofputil_port_to_ofp11(flow->in_port.ofp_port);
649 case MFF_ACTSET_OUTPUT:
650 value->be32 = ofputil_port_to_ofp11(flow->actset_output);
653 case MFF_SKB_PRIORITY:
654 value->be32 = htonl(flow->skb_priority);
658 value->be32 = htonl(flow->pkt_mark);
662 value->be32 = htonl(flow->ct_state);
666 value->be16 = htons(flow->ct_zone);
670 value->be32 = htonl(flow->ct_mark);
674 hton128(&flow->ct_label, &value->be128);
678 value->be32 = htonl(flow->regs[mf->id - MFF_REG0]);
682 value->be64 = htonll(flow_get_xreg(flow, mf->id - MFF_XREG0));
686 value->mac = flow->dl_src;
690 value->mac = flow->dl_dst;
694 value->be16 = flow->dl_type;
698 value->be16 = flow->vlan_tci;
702 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK);
705 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI);
708 case MFF_DL_VLAN_PCP:
710 value->u8 = vlan_tci_to_pcp(flow->vlan_tci);
714 value->be32 = htonl(mpls_lse_to_label(flow->mpls_lse[0]));
718 value->u8 = mpls_lse_to_tc(flow->mpls_lse[0]);
722 value->u8 = mpls_lse_to_bos(flow->mpls_lse[0]);
726 value->be32 = flow->nw_src;
730 value->be32 = flow->nw_dst;
734 value->ipv6 = flow->ipv6_src;
738 value->ipv6 = flow->ipv6_dst;
742 value->be32 = flow->ipv6_label;
746 value->u8 = flow->nw_proto;
750 value->u8 = flow->nw_tos & IP_DSCP_MASK;
753 case MFF_IP_DSCP_SHIFTED:
754 value->u8 = flow->nw_tos >> 2;
758 value->u8 = flow->nw_tos & IP_ECN_MASK;
762 value->u8 = flow->nw_ttl;
766 value->u8 = flow->nw_frag;
770 value->be16 = htons(flow->nw_proto);
774 value->be32 = flow->nw_src;
778 value->be32 = flow->nw_dst;
783 value->mac = flow->arp_sha;
788 value->mac = flow->arp_tha;
794 value->be16 = flow->tp_src;
800 value->be16 = flow->tp_dst;
804 value->be16 = flow->tcp_flags;
807 case MFF_ICMPV4_TYPE:
808 case MFF_ICMPV6_TYPE:
809 value->u8 = ntohs(flow->tp_src);
812 case MFF_ICMPV4_CODE:
813 case MFF_ICMPV6_CODE:
814 value->u8 = ntohs(flow->tp_dst);
818 value->ipv6 = flow->nd_target;
827 /* Makes 'match' match field 'mf' exactly, with the value matched taken from
828 * 'value'. The caller is responsible for ensuring that 'match' meets 'mf''s
831 * If non-NULL, 'err_str' returns a malloc'ed string describing any errors
832 * with the request or NULL if there is no error. The caller is reponsible
833 * for freeing the string. */
835 mf_set_value(const struct mf_field *mf,
836 const union mf_value *value, struct match *match, char **err_str)
844 match_set_dp_hash(match, ntohl(value->be32));
847 match_set_recirc_id(match, ntohl(value->be32));
850 match_set_conj_id(match, ntohl(value->be32));
853 match_set_tun_id(match, value->be64);
856 match_set_tun_src(match, value->be32);
859 match_set_tun_dst(match, value->be32);
862 match_set_tun_flags(match, ntohs(value->be16));
865 match_set_tun_gbp_id(match, value->be16);
867 case MFF_TUN_GBP_FLAGS:
868 match_set_tun_gbp_flags(match, value->u8);
871 match_set_tun_tos(match, value->u8);
874 match_set_tun_ttl(match, value->u8);
876 CASE_MFF_TUN_METADATA:
877 tun_metadata_set_match(mf, value, NULL, match, err_str);
881 match_set_metadata(match, value->be64);
885 match_set_in_port(match, u16_to_ofp(ntohs(value->be16)));
888 case MFF_IN_PORT_OXM: {
890 ofputil_port_from_ofp11(value->be32, &port);
891 match_set_in_port(match, port);
894 case MFF_ACTSET_OUTPUT: {
896 ofputil_port_from_ofp11(value->be32, &port);
897 match_set_actset_output(match, port);
901 case MFF_SKB_PRIORITY:
902 match_set_skb_priority(match, ntohl(value->be32));
906 match_set_pkt_mark(match, ntohl(value->be32));
910 match_set_ct_state(match, ntohl(value->be32));
914 match_set_ct_zone(match, ntohs(value->be16));
918 match_set_ct_mark(match, ntohl(value->be32));
924 ntoh128(&value->be128, &label);
925 match_set_ct_label(match, label);
930 match_set_reg(match, mf->id - MFF_REG0, ntohl(value->be32));
934 match_set_xreg(match, mf->id - MFF_XREG0, ntohll(value->be64));
938 match_set_dl_src(match, value->mac);
942 match_set_dl_dst(match, value->mac);
946 match_set_dl_type(match, value->be16);
950 match_set_dl_tci(match, value->be16);
954 match_set_dl_vlan(match, value->be16);
957 match_set_vlan_vid(match, value->be16);
960 case MFF_DL_VLAN_PCP:
962 match_set_dl_vlan_pcp(match, value->u8);
966 match_set_mpls_label(match, 0, value->be32);
970 match_set_mpls_tc(match, 0, value->u8);
974 match_set_mpls_bos(match, 0, value->u8);
978 match_set_nw_src(match, value->be32);
982 match_set_nw_dst(match, value->be32);
986 match_set_ipv6_src(match, &value->ipv6);
990 match_set_ipv6_dst(match, &value->ipv6);
994 match_set_ipv6_label(match, value->be32);
998 match_set_nw_proto(match, value->u8);
1002 match_set_nw_dscp(match, value->u8);
1005 case MFF_IP_DSCP_SHIFTED:
1006 match_set_nw_dscp(match, value->u8 << 2);
1010 match_set_nw_ecn(match, value->u8);
1014 match_set_nw_ttl(match, value->u8);
1018 match_set_nw_frag(match, value->u8);
1022 match_set_nw_proto(match, ntohs(value->be16));
1026 match_set_nw_src(match, value->be32);
1030 match_set_nw_dst(match, value->be32);
1035 match_set_arp_sha(match, value->mac);
1040 match_set_arp_tha(match, value->mac);
1046 match_set_tp_src(match, value->be16);
1052 match_set_tp_dst(match, value->be16);
1056 match_set_tcp_flags(match, value->be16);
1059 case MFF_ICMPV4_TYPE:
1060 case MFF_ICMPV6_TYPE:
1061 match_set_icmp_type(match, value->u8);
1064 case MFF_ICMPV4_CODE:
1065 case MFF_ICMPV6_CODE:
1066 match_set_icmp_code(match, value->u8);
1070 match_set_nd_target(match, &value->ipv6);
1079 /* Unwildcard 'mask' member field described by 'mf'. The caller is
1080 * responsible for ensuring that 'mask' meets 'mf''s prerequisites. */
1082 mf_mask_field(const struct mf_field *mf, struct flow *mask)
1084 /* For MFF_DL_VLAN, we cannot send a all 1's to flow_set_dl_vlan()
1085 * as that will be considered as OFP10_VLAN_NONE. So consider it as a
1086 * special case. For the rest, calling mf_set_flow_value() is good
1088 if (mf->id == MFF_DL_VLAN) {
1089 flow_set_dl_vlan(mask, htons(VLAN_VID_MASK));
1091 mf_set_flow_value(mf, &exact_match_mask, mask);
1096 field_len(const struct mf_field *mf, const union mf_value *value_)
1098 const uint8_t *value = &value_->u8;
1101 if (!mf->variable_len) {
1109 for (i = 0; i < mf->n_bytes; i++) {
1110 if (value[i] != 0) {
1115 return mf->n_bytes - i;
1118 /* Returns the effective length of the field. For fixed length fields,
1119 * this is just the defined length. For variable length fields, it is
1120 * the minimum size encoding that retains the same meaning (i.e.
1121 * discarding leading zeros).
1123 * 'is_masked' returns (if non-NULL) whether the original contained
1124 * a mask. Otherwise, a mask that is the same length as the value
1125 * might be misinterpreted as an exact match. */
1127 mf_field_len(const struct mf_field *mf, const union mf_value *value,
1128 const union mf_value *mask, bool *is_masked_)
1131 bool is_masked = mask && !is_all_ones(mask, mf->n_bytes);
1133 len = field_len(mf, value);
1135 mask_len = field_len(mf, mask);
1136 len = MAX(len, mask_len);
1140 *is_masked_ = is_masked;
1146 /* Sets 'flow' member field described by 'mf' to 'value'. The caller is
1147 * responsible for ensuring that 'flow' meets 'mf''s prerequisites.*/
1149 mf_set_flow_value(const struct mf_field *mf,
1150 const union mf_value *value, struct flow *flow)
1154 flow->dp_hash = ntohl(value->be32);
1157 flow->recirc_id = ntohl(value->be32);
1160 flow->conj_id = ntohl(value->be32);
1163 flow->tunnel.tun_id = value->be64;
1166 flow->tunnel.ip_src = value->be32;
1169 flow->tunnel.ip_dst = value->be32;
1172 flow->tunnel.flags = (flow->tunnel.flags & ~FLOW_TNL_PUB_F_MASK) |
1175 case MFF_TUN_GBP_ID:
1176 flow->tunnel.gbp_id = value->be16;
1178 case MFF_TUN_GBP_FLAGS:
1179 flow->tunnel.gbp_flags = value->u8;
1182 flow->tunnel.ip_tos = value->u8;
1185 flow->tunnel.ip_ttl = value->u8;
1187 CASE_MFF_TUN_METADATA:
1188 tun_metadata_write(&flow->tunnel, mf, value);
1191 flow->metadata = value->be64;
1195 flow->in_port.ofp_port = u16_to_ofp(ntohs(value->be16));
1198 case MFF_IN_PORT_OXM:
1199 ofputil_port_from_ofp11(value->be32, &flow->in_port.ofp_port);
1201 case MFF_ACTSET_OUTPUT:
1202 ofputil_port_from_ofp11(value->be32, &flow->actset_output);
1205 case MFF_SKB_PRIORITY:
1206 flow->skb_priority = ntohl(value->be32);
1210 flow->pkt_mark = ntohl(value->be32);
1214 flow->ct_state = ntohl(value->be32);
1218 flow->ct_zone = ntohs(value->be16);
1222 flow->ct_mark = ntohl(value->be32);
1226 ntoh128(&value->be128, &flow->ct_label);
1230 flow->regs[mf->id - MFF_REG0] = ntohl(value->be32);
1234 flow_set_xreg(flow, mf->id - MFF_XREG0, ntohll(value->be64));
1238 flow->dl_src = value->mac;
1242 flow->dl_dst = value->mac;
1246 flow->dl_type = value->be16;
1250 flow->vlan_tci = value->be16;
1254 flow_set_dl_vlan(flow, value->be16);
1257 flow_set_vlan_vid(flow, value->be16);
1260 case MFF_DL_VLAN_PCP:
1262 flow_set_vlan_pcp(flow, value->u8);
1265 case MFF_MPLS_LABEL:
1266 flow_set_mpls_label(flow, 0, value->be32);
1270 flow_set_mpls_tc(flow, 0, value->u8);
1274 flow_set_mpls_bos(flow, 0, value->u8);
1278 flow->nw_src = value->be32;
1282 flow->nw_dst = value->be32;
1286 flow->ipv6_src = value->ipv6;
1290 flow->ipv6_dst = value->ipv6;
1293 case MFF_IPV6_LABEL:
1294 flow->ipv6_label = value->be32 & htonl(IPV6_LABEL_MASK);
1298 flow->nw_proto = value->u8;
1302 flow->nw_tos &= ~IP_DSCP_MASK;
1303 flow->nw_tos |= value->u8 & IP_DSCP_MASK;
1306 case MFF_IP_DSCP_SHIFTED:
1307 flow->nw_tos &= ~IP_DSCP_MASK;
1308 flow->nw_tos |= value->u8 << 2;
1312 flow->nw_tos &= ~IP_ECN_MASK;
1313 flow->nw_tos |= value->u8 & IP_ECN_MASK;
1317 flow->nw_ttl = value->u8;
1321 flow->nw_frag = value->u8 & FLOW_NW_FRAG_MASK;
1325 flow->nw_proto = ntohs(value->be16);
1329 flow->nw_src = value->be32;
1333 flow->nw_dst = value->be32;
1338 flow->arp_sha = value->mac;
1343 flow->arp_tha = value->mac;
1349 flow->tp_src = value->be16;
1355 flow->tp_dst = value->be16;
1359 flow->tcp_flags = value->be16;
1362 case MFF_ICMPV4_TYPE:
1363 case MFF_ICMPV6_TYPE:
1364 flow->tp_src = htons(value->u8);
1367 case MFF_ICMPV4_CODE:
1368 case MFF_ICMPV6_CODE:
1369 flow->tp_dst = htons(value->u8);
1373 flow->nd_target = value->ipv6;
1382 /* Consider each of 'src', 'mask', and 'dst' as if they were arrays of 8*n
1383 * bits. Then, for each 0 <= i < 8 * n such that mask[i] == 1, sets dst[i] =
1386 apply_mask(const uint8_t *src, const uint8_t *mask, uint8_t *dst, size_t n)
1390 for (i = 0; i < n; i++) {
1391 dst[i] = (src[i] & mask[i]) | (dst[i] & ~mask[i]);
1395 /* Sets 'flow' member field described by 'field' to 'value', except that bits
1396 * for which 'mask' has a 0-bit keep their existing values. The caller is
1397 * responsible for ensuring that 'flow' meets 'field''s prerequisites.*/
1399 mf_set_flow_value_masked(const struct mf_field *field,
1400 const union mf_value *value,
1401 const union mf_value *mask,
1406 mf_get_value(field, flow, &tmp);
1407 apply_mask((const uint8_t *) value, (const uint8_t *) mask,
1408 (uint8_t *) &tmp, field->n_bytes);
1409 mf_set_flow_value(field, &tmp, flow);
1413 mf_is_tun_metadata(const struct mf_field *mf)
1415 return mf->id >= MFF_TUN_METADATA0 &&
1416 mf->id < MFF_TUN_METADATA0 + TUN_METADATA_NUM_OPTS;
1419 /* Returns true if 'mf' has previously been set in 'flow', false if
1420 * it contains a non-default value.
1422 * The caller is responsible for ensuring that 'flow' meets 'mf''s
1425 mf_is_set(const struct mf_field *mf, const struct flow *flow)
1427 if (!mf_is_tun_metadata(mf)) {
1428 union mf_value value;
1430 mf_get_value(mf, flow, &value);
1431 return !is_all_zeros(&value, mf->n_bytes);
1433 return ULLONG_GET(flow->tunnel.metadata.present.map,
1434 mf->id - MFF_TUN_METADATA0);
1438 /* Makes 'match' wildcard field 'mf'.
1440 * The caller is responsible for ensuring that 'match' meets 'mf''s
1443 * If non-NULL, 'err_str' returns a malloc'ed string describing any errors
1444 * with the request or NULL if there is no error. The caller is reponsible
1445 * for freeing the string. */
1447 mf_set_wild(const struct mf_field *mf, struct match *match, char **err_str)
1455 match->flow.dp_hash = 0;
1456 match->wc.masks.dp_hash = 0;
1459 match->flow.recirc_id = 0;
1460 match->wc.masks.recirc_id = 0;
1463 match->flow.conj_id = 0;
1464 match->wc.masks.conj_id = 0;
1467 match_set_tun_id_masked(match, htonll(0), htonll(0));
1470 match_set_tun_src_masked(match, htonl(0), htonl(0));
1473 match_set_tun_dst_masked(match, htonl(0), htonl(0));
1476 match_set_tun_flags_masked(match, 0, 0);
1478 case MFF_TUN_GBP_ID:
1479 match_set_tun_gbp_id_masked(match, 0, 0);
1481 case MFF_TUN_GBP_FLAGS:
1482 match_set_tun_gbp_flags_masked(match, 0, 0);
1485 match_set_tun_tos_masked(match, 0, 0);
1488 match_set_tun_ttl_masked(match, 0, 0);
1490 CASE_MFF_TUN_METADATA:
1491 tun_metadata_set_match(mf, NULL, NULL, match, err_str);
1495 match_set_metadata_masked(match, htonll(0), htonll(0));
1499 case MFF_IN_PORT_OXM:
1500 match->flow.in_port.ofp_port = 0;
1501 match->wc.masks.in_port.ofp_port = 0;
1503 case MFF_ACTSET_OUTPUT:
1504 match->flow.actset_output = 0;
1505 match->wc.masks.actset_output = 0;
1508 case MFF_SKB_PRIORITY:
1509 match->flow.skb_priority = 0;
1510 match->wc.masks.skb_priority = 0;
1514 match->flow.pkt_mark = 0;
1515 match->wc.masks.pkt_mark = 0;
1519 match->flow.ct_state = 0;
1520 match->wc.masks.ct_state = 0;
1524 match->flow.ct_zone = 0;
1525 match->wc.masks.ct_zone = 0;
1529 match->flow.ct_mark = 0;
1530 match->wc.masks.ct_mark = 0;
1534 memset(&match->flow.ct_label, 0, sizeof(match->flow.ct_label));
1535 memset(&match->wc.masks.ct_label, 0, sizeof(match->wc.masks.ct_label));
1539 match_set_reg_masked(match, mf->id - MFF_REG0, 0, 0);
1543 match_set_xreg_masked(match, mf->id - MFF_XREG0, 0, 0);
1547 match->flow.dl_src = eth_addr_zero;
1548 match->wc.masks.dl_src = eth_addr_zero;
1552 match->flow.dl_dst = eth_addr_zero;
1553 match->wc.masks.dl_dst = eth_addr_zero;
1557 match->flow.dl_type = htons(0);
1558 match->wc.masks.dl_type = htons(0);
1562 match_set_dl_tci_masked(match, htons(0), htons(0));
1567 match_set_any_vid(match);
1570 case MFF_DL_VLAN_PCP:
1572 match_set_any_pcp(match);
1575 case MFF_MPLS_LABEL:
1576 match_set_any_mpls_label(match, 0);
1580 match_set_any_mpls_tc(match, 0);
1584 match_set_any_mpls_bos(match, 0);
1589 match_set_nw_src_masked(match, htonl(0), htonl(0));
1594 match_set_nw_dst_masked(match, htonl(0), htonl(0));
1598 memset(&match->wc.masks.ipv6_src, 0, sizeof match->wc.masks.ipv6_src);
1599 memset(&match->flow.ipv6_src, 0, sizeof match->flow.ipv6_src);
1603 memset(&match->wc.masks.ipv6_dst, 0, sizeof match->wc.masks.ipv6_dst);
1604 memset(&match->flow.ipv6_dst, 0, sizeof match->flow.ipv6_dst);
1607 case MFF_IPV6_LABEL:
1608 match->wc.masks.ipv6_label = htonl(0);
1609 match->flow.ipv6_label = htonl(0);
1613 match->wc.masks.nw_proto = 0;
1614 match->flow.nw_proto = 0;
1618 case MFF_IP_DSCP_SHIFTED:
1619 match->wc.masks.nw_tos &= ~IP_DSCP_MASK;
1620 match->flow.nw_tos &= ~IP_DSCP_MASK;
1624 match->wc.masks.nw_tos &= ~IP_ECN_MASK;
1625 match->flow.nw_tos &= ~IP_ECN_MASK;
1629 match->wc.masks.nw_ttl = 0;
1630 match->flow.nw_ttl = 0;
1634 match->wc.masks.nw_frag &= ~FLOW_NW_FRAG_MASK;
1635 match->flow.nw_frag &= ~FLOW_NW_FRAG_MASK;
1639 match->wc.masks.nw_proto = 0;
1640 match->flow.nw_proto = 0;
1645 match->flow.arp_sha = eth_addr_zero;
1646 match->wc.masks.arp_sha = eth_addr_zero;
1651 match->flow.arp_tha = eth_addr_zero;
1652 match->wc.masks.arp_tha = eth_addr_zero;
1658 case MFF_ICMPV4_TYPE:
1659 case MFF_ICMPV6_TYPE:
1660 match->wc.masks.tp_src = htons(0);
1661 match->flow.tp_src = htons(0);
1667 case MFF_ICMPV4_CODE:
1668 case MFF_ICMPV6_CODE:
1669 match->wc.masks.tp_dst = htons(0);
1670 match->flow.tp_dst = htons(0);
1674 match->wc.masks.tcp_flags = htons(0);
1675 match->flow.tcp_flags = htons(0);
1679 memset(&match->wc.masks.nd_target, 0,
1680 sizeof match->wc.masks.nd_target);
1681 memset(&match->flow.nd_target, 0, sizeof match->flow.nd_target);
1690 /* Makes 'match' match field 'mf' with the specified 'value' and 'mask'.
1691 * 'value' specifies a value to match and 'mask' specifies a wildcard pattern,
1692 * with a 1-bit indicating that the corresponding value bit must match and a
1693 * 0-bit indicating a don't-care.
1695 * If 'mask' is NULL or points to all-1-bits, then this call is equivalent to
1696 * mf_set_value(mf, value, match). If 'mask' points to all-0-bits, then this
1697 * call is equivalent to mf_set_wild(mf, match).
1699 * 'mask' must be a valid mask for 'mf' (see mf_is_mask_valid()). The caller
1700 * is responsible for ensuring that 'match' meets 'mf''s prerequisites.
1702 * If non-NULL, 'err_str' returns a malloc'ed string describing any errors
1703 * with the request or NULL if there is no error. The caller is reponsible
1704 * for freeing the string.
1706 * Return a set of enum ofputil_protocol bits (as an uint32_t to avoid circular
1707 * dependency on enum ofputil_protocol definition) indicating which OpenFlow
1708 * protocol versions can support this functionality. */
1710 mf_set(const struct mf_field *mf,
1711 const union mf_value *value, const union mf_value *mask,
1712 struct match *match, char **err_str)
1714 if (!mask || is_all_ones(mask, mf->n_bytes)) {
1715 mf_set_value(mf, value, match, err_str);
1716 return mf->usable_protocols_exact;
1717 } else if (is_all_zeros(mask, mf->n_bytes) && !mf_is_tun_metadata(mf)) {
1718 /* Tunnel metadata matches on the existence of the field itself, so
1719 * it still needs to be encoded even if the value is wildcarded. */
1720 mf_set_wild(mf, match, err_str);
1721 return OFPUTIL_P_ANY;
1733 case MFF_IN_PORT_OXM:
1734 case MFF_ACTSET_OUTPUT:
1735 case MFF_SKB_PRIORITY:
1738 case MFF_DL_VLAN_PCP:
1740 case MFF_MPLS_LABEL:
1746 case MFF_IP_DSCP_SHIFTED:
1749 case MFF_ICMPV4_TYPE:
1750 case MFF_ICMPV4_CODE:
1751 case MFF_ICMPV6_TYPE:
1752 case MFF_ICMPV6_CODE:
1753 return OFPUTIL_P_NONE;
1756 match_set_dp_hash_masked(match, ntohl(value->be32), ntohl(mask->be32));
1759 match_set_tun_id_masked(match, value->be64, mask->be64);
1762 match_set_tun_src_masked(match, value->be32, mask->be32);
1765 match_set_tun_dst_masked(match, value->be32, mask->be32);
1768 match_set_tun_flags_masked(match, ntohs(value->be16), ntohs(mask->be16));
1770 case MFF_TUN_GBP_ID:
1771 match_set_tun_gbp_id_masked(match, value->be16, mask->be16);
1773 case MFF_TUN_GBP_FLAGS:
1774 match_set_tun_gbp_flags_masked(match, value->u8, mask->u8);
1777 match_set_tun_ttl_masked(match, value->u8, mask->u8);
1780 match_set_tun_tos_masked(match, value->u8, mask->u8);
1782 CASE_MFF_TUN_METADATA:
1783 tun_metadata_set_match(mf, value, mask, match, err_str);
1787 match_set_metadata_masked(match, value->be64, mask->be64);
1791 match_set_reg_masked(match, mf->id - MFF_REG0,
1792 ntohl(value->be32), ntohl(mask->be32));
1796 match_set_xreg_masked(match, mf->id - MFF_XREG0,
1797 ntohll(value->be64), ntohll(mask->be64));
1801 match_set_pkt_mark_masked(match, ntohl(value->be32),
1806 match_set_ct_state_masked(match, ntohl(value->be32), ntohl(mask->be32));
1810 match_set_ct_mark_masked(match, ntohl(value->be32), ntohl(mask->be32));
1813 case MFF_CT_LABEL: {
1814 ovs_u128 hlabel, hmask;
1816 ntoh128(&value->be128, &hlabel);
1818 ntoh128(&mask->be128, &hmask);
1820 hmask.u64.lo = hmask.u64.hi = UINT64_MAX;
1822 match_set_ct_label_masked(match, hlabel, hmask);
1827 match_set_dl_dst_masked(match, value->mac, mask->mac);
1831 match_set_dl_src_masked(match, value->mac, mask->mac);
1836 match_set_arp_sha_masked(match, value->mac, mask->mac);
1841 match_set_arp_tha_masked(match, value->mac, mask->mac);
1845 match_set_dl_tci_masked(match, value->be16, mask->be16);
1849 match_set_vlan_vid_masked(match, value->be16, mask->be16);
1853 match_set_nw_src_masked(match, value->be32, mask->be32);
1857 match_set_nw_dst_masked(match, value->be32, mask->be32);
1861 match_set_ipv6_src_masked(match, &value->ipv6, &mask->ipv6);
1865 match_set_ipv6_dst_masked(match, &value->ipv6, &mask->ipv6);
1868 case MFF_IPV6_LABEL:
1869 if ((mask->be32 & htonl(IPV6_LABEL_MASK)) == htonl(IPV6_LABEL_MASK)) {
1870 mf_set_value(mf, value, match, err_str);
1872 match_set_ipv6_label_masked(match, value->be32, mask->be32);
1877 match_set_nd_target_masked(match, &value->ipv6, &mask->ipv6);
1881 match_set_nw_frag_masked(match, value->u8, mask->u8);
1885 match_set_nw_src_masked(match, value->be32, mask->be32);
1889 match_set_nw_dst_masked(match, value->be32, mask->be32);
1895 match_set_tp_src_masked(match, value->be16, mask->be16);
1901 match_set_tp_dst_masked(match, value->be16, mask->be16);
1905 match_set_tcp_flags_masked(match, value->be16, mask->be16);
1913 return ((mf->usable_protocols_bitwise == mf->usable_protocols_cidr
1914 || ip_is_cidr(mask->be32))
1915 ? mf->usable_protocols_cidr
1916 : mf->usable_protocols_bitwise);
1920 mf_check__(const struct mf_subfield *sf, const struct flow *flow,
1924 VLOG_WARN_RL(&rl, "unknown %s field", type);
1925 return OFPERR_OFPBAC_BAD_SET_TYPE;
1926 } else if (!sf->n_bits) {
1927 VLOG_WARN_RL(&rl, "zero bit %s field %s", type, sf->field->name);
1928 return OFPERR_OFPBAC_BAD_SET_LEN;
1929 } else if (sf->ofs >= sf->field->n_bits) {
1930 VLOG_WARN_RL(&rl, "bit offset %d exceeds %d-bit width of %s field %s",
1931 sf->ofs, sf->field->n_bits, type, sf->field->name);
1932 return OFPERR_OFPBAC_BAD_SET_LEN;
1933 } else if (sf->ofs + sf->n_bits > sf->field->n_bits) {
1934 VLOG_WARN_RL(&rl, "bit offset %d and width %d exceeds %d-bit width "
1935 "of %s field %s", sf->ofs, sf->n_bits,
1936 sf->field->n_bits, type, sf->field->name);
1937 return OFPERR_OFPBAC_BAD_SET_LEN;
1938 } else if (flow && !mf_are_prereqs_ok(sf->field, flow)) {
1939 VLOG_WARN_RL(&rl, "%s field %s lacks correct prerequisites",
1940 type, sf->field->name);
1941 return OFPERR_OFPBAC_MATCH_INCONSISTENT;
1947 /* Checks whether 'sf' is valid for reading a subfield out of 'flow'. Returns
1948 * 0 if so, otherwise an OpenFlow error code (e.g. as returned by
1951 mf_check_src(const struct mf_subfield *sf, const struct flow *flow)
1953 return mf_check__(sf, flow, "source");
1956 /* Checks whether 'sf' is valid for writing a subfield into 'flow'. Returns 0
1957 * if so, otherwise an OpenFlow error code (e.g. as returned by
1960 mf_check_dst(const struct mf_subfield *sf, const struct flow *flow)
1962 int error = mf_check__(sf, flow, "destination");
1963 if (!error && !sf->field->writable) {
1964 VLOG_WARN_RL(&rl, "destination field %s is not writable",
1966 return OFPERR_OFPBAC_BAD_SET_ARGUMENT;
1971 /* Copies the value and wildcard bit pattern for 'mf' from 'match' into the
1972 * 'value' and 'mask', respectively. */
1974 mf_get(const struct mf_field *mf, const struct match *match,
1975 union mf_value *value, union mf_value *mask)
1977 mf_get_value(mf, &match->flow, value);
1978 mf_get_mask(mf, &match->wc, mask);
1982 mf_from_integer_string(const struct mf_field *mf, const char *s,
1983 uint8_t *valuep, uint8_t *maskp)
1986 const char *err_str = "";
1989 err = parse_int_string(s, valuep, mf->n_bytes, &tail);
1990 if (err || (*tail != '\0' && *tail != '/')) {
1996 err = parse_int_string(tail + 1, maskp, mf->n_bytes, &tail);
1997 if (err || *tail != '\0') {
2002 memset(maskp, 0xff, mf->n_bytes);
2008 if (err == ERANGE) {
2009 return xasprintf("%s: %s too large for %u-byte field %s",
2010 s, err_str, mf->n_bytes, mf->name);
2012 return xasprintf("%s: bad syntax for %s %s", s, mf->name, err_str);
2017 mf_from_ethernet_string(const struct mf_field *mf, const char *s,
2018 struct eth_addr *mac, struct eth_addr *mask)
2022 ovs_assert(mf->n_bytes == ETH_ADDR_LEN);
2025 if (ovs_scan(s, ETH_ADDR_SCAN_FMT"%n", ETH_ADDR_SCAN_ARGS(*mac), &n)
2026 && n == strlen(s)) {
2027 *mask = eth_addr_exact;
2032 if (ovs_scan(s, ETH_ADDR_SCAN_FMT"/"ETH_ADDR_SCAN_FMT"%n",
2033 ETH_ADDR_SCAN_ARGS(*mac), ETH_ADDR_SCAN_ARGS(*mask), &n)
2034 && n == strlen(s)) {
2038 return xasprintf("%s: invalid Ethernet address", s);
2042 mf_from_ipv4_string(const struct mf_field *mf, const char *s,
2043 ovs_be32 *ip, ovs_be32 *mask)
2047 ovs_assert(mf->n_bytes == sizeof *ip);
2049 if (ovs_scan(s, IP_SCAN_FMT"/"IP_SCAN_FMT,
2050 IP_SCAN_ARGS(ip), IP_SCAN_ARGS(mask))) {
2052 } else if (ovs_scan(s, IP_SCAN_FMT"/%d", IP_SCAN_ARGS(ip), &prefix)) {
2053 if (prefix <= 0 || prefix > 32) {
2054 return xasprintf("%s: network prefix bits not between 0 and "
2057 *mask = be32_prefix_mask(prefix);
2058 } else if (ovs_scan(s, IP_SCAN_FMT, IP_SCAN_ARGS(ip))) {
2059 *mask = OVS_BE32_MAX;
2061 return xasprintf("%s: invalid IP address", s);
2067 mf_from_ipv6_string(const struct mf_field *mf, const char *s,
2068 struct in6_addr *value, struct in6_addr *mask)
2070 char *str = xstrdup(s);
2071 char *save_ptr = NULL;
2072 const char *name, *netmask;
2075 ovs_assert(mf->n_bytes == sizeof *value);
2077 name = strtok_r(str, "/", &save_ptr);
2078 retval = name ? lookup_ipv6(name, value) : EINVAL;
2082 err = xasprintf("%s: could not convert to IPv6 address", str);
2088 netmask = strtok_r(NULL, "/", &save_ptr);
2090 if (inet_pton(AF_INET6, netmask, mask) != 1) {
2091 int prefix = atoi(netmask);
2092 if (prefix <= 0 || prefix > 128) {
2094 return xasprintf("%s: prefix bits not between 1 and 128", s);
2096 *mask = ipv6_create_mask(prefix);
2100 *mask = in6addr_exact;
2108 mf_from_ofp_port_string(const struct mf_field *mf, const char *s,
2109 ovs_be16 *valuep, ovs_be16 *maskp)
2113 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2115 if (ofputil_port_from_string(s, &port)) {
2116 *valuep = htons(ofp_to_u16(port));
2117 *maskp = OVS_BE16_MAX;
2120 return xasprintf("%s: port value out of range for %s", s, mf->name);
2124 mf_from_ofp_port_string32(const struct mf_field *mf, const char *s,
2125 ovs_be32 *valuep, ovs_be32 *maskp)
2129 ovs_assert(mf->n_bytes == sizeof(ovs_be32));
2130 if (ofputil_port_from_string(s, &port)) {
2131 *valuep = ofputil_port_to_ofp11(port);
2132 *maskp = OVS_BE32_MAX;
2135 return xasprintf("%s: port value out of range for %s", s, mf->name);
2138 struct frag_handling {
2144 static const struct frag_handling all_frags[] = {
2145 #define A FLOW_NW_FRAG_ANY
2146 #define L FLOW_NW_FRAG_LATER
2147 /* name mask value */
2150 { "first", A|L, A },
2151 { "later", A|L, A|L },
2156 { "not_later", L, 0 },
2163 mf_from_frag_string(const char *s, uint8_t *valuep, uint8_t *maskp)
2165 const struct frag_handling *h;
2167 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2168 if (!strcasecmp(s, h->name)) {
2169 /* We force the upper bits of the mask on to make mf_parse_value()
2170 * happy (otherwise it will never think it's an exact match.) */
2171 *maskp = h->mask | ~FLOW_NW_FRAG_MASK;
2177 return xasprintf("%s: unknown fragment type (valid types are \"no\", "
2178 "\"yes\", \"first\", \"later\", \"not_first\"", s);
2182 parse_mf_flags(const char *s, const char *(*bit_to_string)(uint32_t),
2183 const char *field_name, ovs_be16 *flagsp, ovs_be16 allowed,
2188 uint32_t flags, mask;
2190 err = parse_flags(s, bit_to_string, '\0', field_name, &err_str,
2191 &flags, ntohs(allowed), maskp ? &mask : NULL);
2196 *flagsp = htons(flags);
2198 *maskp = htons(mask);
2205 mf_from_tcp_flags_string(const char *s, ovs_be16 *flagsp, ovs_be16 *maskp)
2207 return parse_mf_flags(s, packet_tcp_flag_to_string, "TCP", flagsp,
2208 TCP_FLAGS_BE16(OVS_BE16_MAX), maskp);
2212 mf_from_tun_flags_string(const char *s, ovs_be16 *flagsp, ovs_be16 *maskp)
2214 return parse_mf_flags(s, flow_tun_flag_to_string, "tunnel", flagsp,
2215 htons(FLOW_TNL_PUB_F_MASK), maskp);
2219 mf_from_ct_state_string(const char *s, ovs_be32 *flagsp, ovs_be32 *maskp)
2223 uint32_t flags, mask;
2225 err = parse_flags(s, ct_state_to_string, '\0', "ct_state", &err_str,
2226 &flags, CS_SUPPORTED_MASK, maskp ? &mask : NULL);
2231 *flagsp = htonl(flags);
2233 *maskp = htonl(mask);
2239 /* Parses 's', a string value for field 'mf', into 'value' and 'mask'. Returns
2240 * NULL if successful, otherwise a malloc()'d string describing the error. */
2242 mf_parse(const struct mf_field *mf, const char *s,
2243 union mf_value *value, union mf_value *mask)
2247 if (!strcmp(s, "*")) {
2248 memset(value, 0, mf->n_bytes);
2249 memset(mask, 0, mf->n_bytes);
2253 switch (mf->string) {
2255 case MFS_HEXADECIMAL:
2256 error = mf_from_integer_string(mf, s,
2257 (uint8_t *) value, (uint8_t *) mask);
2261 ovs_assert(mf->n_bytes == sizeof(ovs_be32));
2262 error = mf_from_ct_state_string(s, &value->be32, &mask->be32);
2266 error = mf_from_ethernet_string(mf, s, &value->mac, &mask->mac);
2270 error = mf_from_ipv4_string(mf, s, &value->be32, &mask->be32);
2274 error = mf_from_ipv6_string(mf, s, &value->ipv6, &mask->ipv6);
2278 error = mf_from_ofp_port_string(mf, s, &value->be16, &mask->be16);
2281 case MFS_OFP_PORT_OXM:
2282 error = mf_from_ofp_port_string32(mf, s, &value->be32, &mask->be32);
2286 error = mf_from_frag_string(s, &value->u8, &mask->u8);
2290 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2291 error = mf_from_tun_flags_string(s, &value->be16, &mask->be16);
2295 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2296 error = mf_from_tcp_flags_string(s, &value->be16, &mask->be16);
2303 if (!error && !mf_is_mask_valid(mf, mask)) {
2304 error = xasprintf("%s: invalid mask for field %s", s, mf->name);
2309 /* Parses 's', a string value for field 'mf', into 'value'. Returns NULL if
2310 * successful, otherwise a malloc()'d string describing the error. */
2312 mf_parse_value(const struct mf_field *mf, const char *s, union mf_value *value)
2314 union mf_value mask;
2317 error = mf_parse(mf, s, value, &mask);
2322 if (!is_all_ones((const uint8_t *) &mask, mf->n_bytes)) {
2323 return xasprintf("%s: wildcards not allowed here", s);
2329 mf_format_integer_string(const struct mf_field *mf, const uint8_t *valuep,
2330 const uint8_t *maskp, struct ds *s)
2332 if (mf->string == MFS_HEXADECIMAL) {
2333 ds_put_hex(s, valuep, mf->n_bytes);
2335 unsigned long long int integer = 0;
2338 ovs_assert(mf->n_bytes <= 8);
2339 for (i = 0; i < mf->n_bytes; i++) {
2340 integer = (integer << 8) | valuep[i];
2342 ds_put_format(s, "%lld", integer);
2346 /* I guess we could write the mask in decimal for MFS_DECIMAL but I'm
2347 * not sure that that a bit-mask written in decimal is ever easier to
2348 * understand than the same bit-mask written in hexadecimal. */
2349 ds_put_char(s, '/');
2350 ds_put_hex(s, maskp, mf->n_bytes);
2355 mf_format_frag_string(uint8_t value, uint8_t mask, struct ds *s)
2357 const struct frag_handling *h;
2359 mask &= FLOW_NW_FRAG_MASK;
2362 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2363 if (value == h->value && mask == h->mask) {
2364 ds_put_cstr(s, h->name);
2368 ds_put_cstr(s, "<error>");
2372 mf_format_tnl_flags_string(ovs_be16 value, ovs_be16 mask, struct ds *s)
2374 format_flags_masked(s, NULL, flow_tun_flag_to_string, ntohs(value),
2375 ntohs(mask) & FLOW_TNL_PUB_F_MASK, FLOW_TNL_PUB_F_MASK);
2379 mf_format_tcp_flags_string(ovs_be16 value, ovs_be16 mask, struct ds *s)
2381 format_flags_masked(s, NULL, packet_tcp_flag_to_string, ntohs(value),
2382 TCP_FLAGS(mask), TCP_FLAGS(OVS_BE16_MAX));
2386 mf_format_ct_state_string(ovs_be32 value, ovs_be32 mask, struct ds *s)
2388 format_flags_masked(s, NULL, ct_state_to_string, ntohl(value),
2389 ntohl(mask), UINT16_MAX);
2392 /* Appends to 's' a string representation of field 'mf' whose value is in
2393 * 'value' and 'mask'. 'mask' may be NULL to indicate an exact match. */
2395 mf_format(const struct mf_field *mf,
2396 const union mf_value *value, const union mf_value *mask,
2400 if (is_all_zeros(mask, mf->n_bytes)) {
2401 ds_put_cstr(s, "ANY");
2403 } else if (is_all_ones(mask, mf->n_bytes)) {
2408 switch (mf->string) {
2409 case MFS_OFP_PORT_OXM:
2412 ofputil_port_from_ofp11(value->be32, &port);
2413 ofputil_format_port(port, s);
2419 ofputil_format_port(u16_to_ofp(ntohs(value->be16)), s);
2424 case MFS_HEXADECIMAL:
2425 mf_format_integer_string(mf, (uint8_t *) value, (uint8_t *) mask, s);
2429 mf_format_ct_state_string(value->be32,
2430 mask ? mask->be32 : OVS_BE32_MAX, s);
2434 eth_format_masked(value->mac, mask ? &mask->mac : NULL, s);
2438 ip_format_masked(value->be32, mask ? mask->be32 : OVS_BE32_MAX, s);
2442 print_ipv6_masked(s, &value->ipv6, mask ? &mask->ipv6 : NULL);
2446 mf_format_frag_string(value->u8, mask ? mask->u8 : UINT8_MAX, s);
2450 mf_format_tnl_flags_string(value->be16,
2451 mask ? mask->be16 : OVS_BE16_MAX, s);
2455 mf_format_tcp_flags_string(value->be16,
2456 mask ? mask->be16 : OVS_BE16_MAX, s);
2464 /* Makes subfield 'sf' within 'flow' exactly match the 'sf->n_bits'
2465 * least-significant bits in 'x'.
2468 mf_write_subfield_flow(const struct mf_subfield *sf,
2469 const union mf_subvalue *x, struct flow *flow)
2471 const struct mf_field *field = sf->field;
2472 union mf_value value;
2474 mf_get_value(field, flow, &value);
2475 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes,
2476 sf->ofs, sf->n_bits);
2477 mf_set_flow_value(field, &value, flow);
2480 /* Makes subfield 'sf' within 'match' exactly match the 'sf->n_bits'
2481 * least-significant bits in 'x'.
2484 mf_write_subfield(const struct mf_subfield *sf, const union mf_subvalue *x,
2485 struct match *match)
2487 const struct mf_field *field = sf->field;
2488 union mf_value value, mask;
2490 mf_get(field, match, &value, &mask);
2491 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes, sf->ofs, sf->n_bits);
2492 bitwise_one ( &mask, field->n_bytes, sf->ofs, sf->n_bits);
2493 mf_set(field, &value, &mask, match, NULL);
2496 /* 'v' and 'm' correspond to values of 'field'. This function copies them into
2497 * 'match' in the correspond positions. */
2499 mf_mask_subfield(const struct mf_field *field,
2500 const union mf_subvalue *v,
2501 const union mf_subvalue *m,
2502 struct match *match)
2504 union mf_value value, mask;
2506 mf_get(field, match, &value, &mask);
2507 bitwise_copy(v, sizeof *v, 0, &value, field->n_bytes, 0, field->n_bits);
2508 bitwise_copy(m, sizeof *m, 0, &mask, field->n_bytes, 0, field->n_bits);
2509 mf_set(field, &value, &mask, match, NULL);
2512 /* Initializes 'x' to the value of 'sf' within 'flow'. 'sf' must be valid for
2513 * reading 'flow', e.g. as checked by mf_check_src(). */
2515 mf_read_subfield(const struct mf_subfield *sf, const struct flow *flow,
2516 union mf_subvalue *x)
2518 union mf_value value;
2520 mf_get_value(sf->field, flow, &value);
2522 memset(x, 0, sizeof *x);
2523 bitwise_copy(&value, sf->field->n_bytes, sf->ofs,
2528 /* Returns the value of 'sf' within 'flow'. 'sf' must be valid for reading
2529 * 'flow', e.g. as checked by mf_check_src() and sf->n_bits must be 64 or
2532 mf_get_subfield(const struct mf_subfield *sf, const struct flow *flow)
2534 union mf_value value;
2536 mf_get_value(sf->field, flow, &value);
2537 return bitwise_get(&value, sf->field->n_bytes, sf->ofs, sf->n_bits);
2541 mf_format_subvalue(const union mf_subvalue *subvalue, struct ds *s)
2543 ds_put_hex(s, subvalue->u8, sizeof subvalue->u8);
2547 field_array_set(enum mf_field_id id, const union mf_value *value,
2548 struct field_array *fa)
2550 ovs_assert(id < MFF_N_IDS);
2551 bitmap_set1(fa->used.bm, id);
2552 fa->value[id] = *value;