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 union mf_value value;
208 tun_metadata_read(&wc->masks.tunnel, mf, &value);
209 return is_all_zeros(&value.tun_metadata, mf->n_bytes);
212 return !wc->masks.metadata;
214 case MFF_IN_PORT_OXM:
215 return !wc->masks.in_port.ofp_port;
216 case MFF_SKB_PRIORITY:
217 return !wc->masks.skb_priority;
219 return !wc->masks.pkt_mark;
221 return !wc->masks.regs[mf->id - MFF_REG0];
223 return !flow_get_xreg(&wc->masks, mf->id - MFF_XREG0);
224 case MFF_ACTSET_OUTPUT:
225 return !wc->masks.actset_output;
228 return eth_addr_is_zero(wc->masks.dl_src);
230 return eth_addr_is_zero(wc->masks.dl_dst);
232 return !wc->masks.dl_type;
236 return eth_addr_is_zero(wc->masks.arp_sha);
240 return eth_addr_is_zero(wc->masks.arp_tha);
243 return !wc->masks.vlan_tci;
245 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK));
247 return !(wc->masks.vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI));
248 case MFF_DL_VLAN_PCP:
250 return !(wc->masks.vlan_tci & htons(VLAN_PCP_MASK));
253 return !(wc->masks.mpls_lse[0] & htonl(MPLS_LABEL_MASK));
255 return !(wc->masks.mpls_lse[0] & htonl(MPLS_TC_MASK));
257 return !(wc->masks.mpls_lse[0] & htonl(MPLS_BOS_MASK));
260 return !wc->masks.nw_src;
262 return !wc->masks.nw_dst;
265 return ipv6_mask_is_any(&wc->masks.ipv6_src);
267 return ipv6_mask_is_any(&wc->masks.ipv6_dst);
270 return !wc->masks.ipv6_label;
273 return !wc->masks.nw_proto;
275 case MFF_IP_DSCP_SHIFTED:
276 return !(wc->masks.nw_tos & IP_DSCP_MASK);
278 return !(wc->masks.nw_tos & IP_ECN_MASK);
280 return !wc->masks.nw_ttl;
283 return ipv6_mask_is_any(&wc->masks.nd_target);
286 return !(wc->masks.nw_frag & FLOW_NW_FRAG_MASK);
289 return !wc->masks.nw_proto;
291 return !wc->masks.nw_src;
293 return !wc->masks.nw_dst;
298 case MFF_ICMPV4_TYPE:
299 case MFF_ICMPV6_TYPE:
300 return !wc->masks.tp_src;
304 case MFF_ICMPV4_CODE:
305 case MFF_ICMPV6_CODE:
306 return !wc->masks.tp_dst;
308 return !wc->masks.tcp_flags;
316 /* Initializes 'mask' with the wildcard bit pattern for field 'mf' within 'wc'.
317 * Each bit in 'mask' will be set to 1 if the bit is significant for matching
318 * purposes, or to 0 if it is wildcarded.
320 * The caller is responsible for ensuring that 'wc' corresponds to a flow that
321 * meets 'mf''s prerequisites. */
323 mf_get_mask(const struct mf_field *mf, const struct flow_wildcards *wc,
324 union mf_value *mask)
326 mf_get_value(mf, &wc->masks, mask);
329 /* Tests whether 'mask' is a valid wildcard bit pattern for 'mf'. Returns true
330 * if the mask is valid, false otherwise. */
332 mf_is_mask_valid(const struct mf_field *mf, const union mf_value *mask)
334 switch (mf->maskable) {
336 return (is_all_zeros(mask, mf->n_bytes) ||
337 is_all_ones(mask, mf->n_bytes));
346 /* Returns true if 'flow' meets the prerequisites for 'mf', false otherwise. */
348 mf_are_prereqs_ok(const struct mf_field *mf, const struct flow *flow)
350 switch (mf->prereqs) {
355 return (flow->dl_type == htons(ETH_TYPE_ARP) ||
356 flow->dl_type == htons(ETH_TYPE_RARP));
358 return flow->dl_type == htons(ETH_TYPE_IP);
360 return flow->dl_type == htons(ETH_TYPE_IPV6);
362 return (flow->vlan_tci & htons(VLAN_CFI)) != 0;
364 return eth_type_mpls(flow->dl_type);
366 return is_ip_any(flow);
369 return is_ip_any(flow) && flow->nw_proto == IPPROTO_TCP
370 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
372 return is_ip_any(flow) && flow->nw_proto == IPPROTO_UDP
373 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
375 return is_ip_any(flow) && flow->nw_proto == IPPROTO_SCTP
376 && !(flow->nw_frag & FLOW_NW_FRAG_LATER);
378 return is_icmpv4(flow);
380 return is_icmpv6(flow);
383 return (is_icmpv6(flow)
384 && flow->tp_dst == htons(0)
385 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT) ||
386 flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
388 return (is_icmpv6(flow)
389 && flow->tp_dst == htons(0)
390 && (flow->tp_src == htons(ND_NEIGHBOR_SOLICIT)));
392 return (is_icmpv6(flow)
393 && flow->tp_dst == htons(0)
394 && (flow->tp_src == htons(ND_NEIGHBOR_ADVERT)));
400 /* Set field and it's prerequisities in the mask.
401 * This is only ever called for writeable 'mf's, but we do not make the
402 * distinction here. */
404 mf_mask_field_and_prereqs(const struct mf_field *mf, struct flow_wildcards *wc)
406 mf_set_flow_value(mf, &exact_match_mask, &wc->masks);
408 switch (mf->prereqs) {
412 WC_MASK_FIELD(wc, tp_src);
413 WC_MASK_FIELD(wc, tp_dst);
420 /* nw_frag always unwildcarded. */
421 WC_MASK_FIELD(wc, nw_proto);
428 /* dl_type always unwildcarded. */
431 WC_MASK_FIELD_MASK(wc, vlan_tci, htons(VLAN_CFI));
438 /* Set bits of 'bm' corresponding to the field 'mf' and it's prerequisities. */
440 mf_bitmap_set_field_and_prereqs(const struct mf_field *mf, struct mf_bitmap *bm)
442 bitmap_set1(bm->bm, mf->id);
444 switch (mf->prereqs) {
448 bitmap_set1(bm->bm, MFF_TCP_SRC);
449 bitmap_set1(bm->bm, MFF_TCP_DST);
456 /* nw_frag always unwildcarded. */
457 bitmap_set1(bm->bm, MFF_IP_PROTO);
464 bitmap_set1(bm->bm, MFF_ETH_TYPE);
467 bitmap_set1(bm->bm, MFF_VLAN_TCI);
474 /* Returns true if 'value' may be a valid value *as part of a masked match*,
477 * A value is not rejected just because it is not valid for the field in
478 * question, but only if it doesn't make sense to test the bits in question at
479 * all. For example, the MFF_VLAN_TCI field will never have a nonzero value
480 * without the VLAN_CFI bit being set, but we can't reject those values because
481 * it is still legitimate to test just for those bits (see the documentation
482 * for NXM_OF_VLAN_TCI in nicira-ext.h). On the other hand, there is never a
483 * reason to set the low bit of MFF_IP_DSCP to 1, so we reject that. */
485 mf_is_value_valid(const struct mf_field *mf, const union mf_value *value)
497 case MFF_TUN_GBP_FLAGS:
498 CASE_MFF_TUN_METADATA:
501 case MFF_SKB_PRIORITY:
525 case MFF_ICMPV4_TYPE:
526 case MFF_ICMPV4_CODE:
527 case MFF_ICMPV6_TYPE:
528 case MFF_ICMPV6_CODE:
534 case MFF_IN_PORT_OXM:
535 case MFF_ACTSET_OUTPUT: {
537 return !ofputil_port_from_ofp11(value->be32, &port);
541 return !(value->u8 & ~IP_DSCP_MASK);
542 case MFF_IP_DSCP_SHIFTED:
543 return !(value->u8 & (~IP_DSCP_MASK >> 2));
545 return !(value->u8 & ~IP_ECN_MASK);
547 return !(value->u8 & ~FLOW_NW_FRAG_MASK);
549 return !(value->be16 & ~htons(0x0fff));
552 return !(value->be16 & htons(0xff00));
555 return !(value->be16 & htons(VLAN_CFI | VLAN_PCP_MASK));
557 return !(value->be16 & htons(VLAN_PCP_MASK));
559 case MFF_DL_VLAN_PCP:
561 return !(value->u8 & ~(VLAN_PCP_MASK >> VLAN_PCP_SHIFT));
564 return !(value->be32 & ~htonl(IPV6_LABEL_MASK));
567 return !(value->be32 & ~htonl(MPLS_LABEL_MASK >> MPLS_LABEL_SHIFT));
570 return !(value->u8 & ~(MPLS_TC_MASK >> MPLS_TC_SHIFT));
573 return !(value->u8 & ~(MPLS_BOS_MASK >> MPLS_BOS_SHIFT));
576 return !(value->be16 & ~htons(FLOW_TNL_PUB_F_MASK));
584 /* Copies the value of field 'mf' from 'flow' into 'value'. The caller is
585 * responsible for ensuring that 'flow' meets 'mf''s prerequisites. */
587 mf_get_value(const struct mf_field *mf, const struct flow *flow,
588 union mf_value *value)
592 value->be32 = htonl(flow->dp_hash);
595 value->be32 = htonl(flow->recirc_id);
598 value->be32 = htonl(flow->conj_id);
601 value->be64 = flow->tunnel.tun_id;
604 value->be32 = flow->tunnel.ip_src;
607 value->be32 = flow->tunnel.ip_dst;
610 value->be16 = htons(flow->tunnel.flags & FLOW_TNL_PUB_F_MASK);
613 value->be16 = flow->tunnel.gbp_id;
615 case MFF_TUN_GBP_FLAGS:
616 value->u8 = flow->tunnel.gbp_flags;
619 value->u8 = flow->tunnel.ip_ttl;
622 value->u8 = flow->tunnel.ip_tos;
624 CASE_MFF_TUN_METADATA:
625 tun_metadata_read(&flow->tunnel, mf, value);
629 value->be64 = flow->metadata;
633 value->be16 = htons(ofp_to_u16(flow->in_port.ofp_port));
635 case MFF_IN_PORT_OXM:
636 value->be32 = ofputil_port_to_ofp11(flow->in_port.ofp_port);
638 case MFF_ACTSET_OUTPUT:
639 value->be32 = ofputil_port_to_ofp11(flow->actset_output);
642 case MFF_SKB_PRIORITY:
643 value->be32 = htonl(flow->skb_priority);
647 value->be32 = htonl(flow->pkt_mark);
651 value->be32 = htonl(flow->regs[mf->id - MFF_REG0]);
655 value->be64 = htonll(flow_get_xreg(flow, mf->id - MFF_XREG0));
659 value->mac = flow->dl_src;
663 value->mac = flow->dl_dst;
667 value->be16 = flow->dl_type;
671 value->be16 = flow->vlan_tci;
675 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK);
678 value->be16 = flow->vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI);
681 case MFF_DL_VLAN_PCP:
683 value->u8 = vlan_tci_to_pcp(flow->vlan_tci);
687 value->be32 = htonl(mpls_lse_to_label(flow->mpls_lse[0]));
691 value->u8 = mpls_lse_to_tc(flow->mpls_lse[0]);
695 value->u8 = mpls_lse_to_bos(flow->mpls_lse[0]);
699 value->be32 = flow->nw_src;
703 value->be32 = flow->nw_dst;
707 value->ipv6 = flow->ipv6_src;
711 value->ipv6 = flow->ipv6_dst;
715 value->be32 = flow->ipv6_label;
719 value->u8 = flow->nw_proto;
723 value->u8 = flow->nw_tos & IP_DSCP_MASK;
726 case MFF_IP_DSCP_SHIFTED:
727 value->u8 = flow->nw_tos >> 2;
731 value->u8 = flow->nw_tos & IP_ECN_MASK;
735 value->u8 = flow->nw_ttl;
739 value->u8 = flow->nw_frag;
743 value->be16 = htons(flow->nw_proto);
747 value->be32 = flow->nw_src;
751 value->be32 = flow->nw_dst;
756 value->mac = flow->arp_sha;
761 value->mac = flow->arp_tha;
767 value->be16 = flow->tp_src;
773 value->be16 = flow->tp_dst;
777 value->be16 = flow->tcp_flags;
780 case MFF_ICMPV4_TYPE:
781 case MFF_ICMPV6_TYPE:
782 value->u8 = ntohs(flow->tp_src);
785 case MFF_ICMPV4_CODE:
786 case MFF_ICMPV6_CODE:
787 value->u8 = ntohs(flow->tp_dst);
791 value->ipv6 = flow->nd_target;
800 /* Makes 'match' match field 'mf' exactly, with the value matched taken from
801 * 'value'. The caller is responsible for ensuring that 'match' meets 'mf''s
804 mf_set_value(const struct mf_field *mf,
805 const union mf_value *value, struct match *match)
809 match_set_dp_hash(match, ntohl(value->be32));
812 match_set_recirc_id(match, ntohl(value->be32));
815 match_set_conj_id(match, ntohl(value->be32));
818 match_set_tun_id(match, value->be64);
821 match_set_tun_src(match, value->be32);
824 match_set_tun_dst(match, value->be32);
827 match_set_tun_flags(match, ntohs(value->be16));
830 match_set_tun_gbp_id(match, value->be16);
832 case MFF_TUN_GBP_FLAGS:
833 match_set_tun_gbp_flags(match, value->u8);
836 match_set_tun_tos(match, value->u8);
839 match_set_tun_ttl(match, value->u8);
841 CASE_MFF_TUN_METADATA:
842 tun_metadata_set_match(mf, value, NULL, match);
846 match_set_metadata(match, value->be64);
850 match_set_in_port(match, u16_to_ofp(ntohs(value->be16)));
853 case MFF_IN_PORT_OXM: {
855 ofputil_port_from_ofp11(value->be32, &port);
856 match_set_in_port(match, port);
859 case MFF_ACTSET_OUTPUT: {
861 ofputil_port_from_ofp11(value->be32, &port);
862 match_set_actset_output(match, port);
866 case MFF_SKB_PRIORITY:
867 match_set_skb_priority(match, ntohl(value->be32));
871 match_set_pkt_mark(match, ntohl(value->be32));
875 match_set_reg(match, mf->id - MFF_REG0, ntohl(value->be32));
879 match_set_xreg(match, mf->id - MFF_XREG0, ntohll(value->be64));
883 match_set_dl_src(match, value->mac);
887 match_set_dl_dst(match, value->mac);
891 match_set_dl_type(match, value->be16);
895 match_set_dl_tci(match, value->be16);
899 match_set_dl_vlan(match, value->be16);
902 match_set_vlan_vid(match, value->be16);
905 case MFF_DL_VLAN_PCP:
907 match_set_dl_vlan_pcp(match, value->u8);
911 match_set_mpls_label(match, 0, value->be32);
915 match_set_mpls_tc(match, 0, value->u8);
919 match_set_mpls_bos(match, 0, value->u8);
923 match_set_nw_src(match, value->be32);
927 match_set_nw_dst(match, value->be32);
931 match_set_ipv6_src(match, &value->ipv6);
935 match_set_ipv6_dst(match, &value->ipv6);
939 match_set_ipv6_label(match, value->be32);
943 match_set_nw_proto(match, value->u8);
947 match_set_nw_dscp(match, value->u8);
950 case MFF_IP_DSCP_SHIFTED:
951 match_set_nw_dscp(match, value->u8 << 2);
955 match_set_nw_ecn(match, value->u8);
959 match_set_nw_ttl(match, value->u8);
963 match_set_nw_frag(match, value->u8);
967 match_set_nw_proto(match, ntohs(value->be16));
971 match_set_nw_src(match, value->be32);
975 match_set_nw_dst(match, value->be32);
980 match_set_arp_sha(match, value->mac);
985 match_set_arp_tha(match, value->mac);
991 match_set_tp_src(match, value->be16);
997 match_set_tp_dst(match, value->be16);
1001 match_set_tcp_flags(match, value->be16);
1004 case MFF_ICMPV4_TYPE:
1005 case MFF_ICMPV6_TYPE:
1006 match_set_icmp_type(match, value->u8);
1009 case MFF_ICMPV4_CODE:
1010 case MFF_ICMPV6_CODE:
1011 match_set_icmp_code(match, value->u8);
1015 match_set_nd_target(match, &value->ipv6);
1024 /* Unwildcard 'mask' member field described by 'mf'. The caller is
1025 * responsible for ensuring that 'mask' meets 'mf''s prerequisites. */
1027 mf_mask_field(const struct mf_field *mf, struct flow *mask)
1029 /* For MFF_DL_VLAN, we cannot send a all 1's to flow_set_dl_vlan()
1030 * as that will be considered as OFP10_VLAN_NONE. So consider it as a
1031 * special case. For the rest, calling mf_set_flow_value() is good
1033 if (mf->id == MFF_DL_VLAN) {
1034 flow_set_dl_vlan(mask, htons(VLAN_VID_MASK));
1036 mf_set_flow_value(mf, &exact_match_mask, mask);
1041 field_len(const struct mf_field *mf, const union mf_value *value_)
1043 const uint8_t *value = &value_->u8;
1046 if (!mf->variable_len) {
1054 for (i = 0; i < mf->n_bytes; i++) {
1055 if (value[i] != 0) {
1060 return mf->n_bytes - i;
1063 /* Returns the effective length of the field. For fixed length fields,
1064 * this is just the defined length. For variable length fields, it is
1065 * the minimum size encoding that retains the same meaning (i.e.
1066 * discarding leading zeros). */
1068 mf_field_len(const struct mf_field *mf, const union mf_value *value,
1069 const union mf_value *mask)
1073 len = field_len(mf, value);
1074 if (mask && !is_all_ones(mask, mf->n_bytes)) {
1075 mask_len = field_len(mf, mask);
1076 len = MAX(len, mask_len);
1082 /* Sets 'flow' member field described by 'mf' to 'value'. The caller is
1083 * responsible for ensuring that 'flow' meets 'mf''s prerequisites.*/
1085 mf_set_flow_value(const struct mf_field *mf,
1086 const union mf_value *value, struct flow *flow)
1090 flow->dp_hash = ntohl(value->be32);
1093 flow->recirc_id = ntohl(value->be32);
1096 flow->conj_id = ntohl(value->be32);
1099 flow->tunnel.tun_id = value->be64;
1102 flow->tunnel.ip_src = value->be32;
1105 flow->tunnel.ip_dst = value->be32;
1108 flow->tunnel.flags = (flow->tunnel.flags & ~FLOW_TNL_PUB_F_MASK) |
1111 case MFF_TUN_GBP_ID:
1112 flow->tunnel.gbp_id = value->be16;
1114 case MFF_TUN_GBP_FLAGS:
1115 flow->tunnel.gbp_flags = value->u8;
1118 flow->tunnel.ip_tos = value->u8;
1121 flow->tunnel.ip_ttl = value->u8;
1123 CASE_MFF_TUN_METADATA:
1124 tun_metadata_write(&flow->tunnel, mf, value);
1127 flow->metadata = value->be64;
1131 flow->in_port.ofp_port = u16_to_ofp(ntohs(value->be16));
1134 case MFF_IN_PORT_OXM:
1135 ofputil_port_from_ofp11(value->be32, &flow->in_port.ofp_port);
1137 case MFF_ACTSET_OUTPUT:
1138 ofputil_port_from_ofp11(value->be32, &flow->actset_output);
1141 case MFF_SKB_PRIORITY:
1142 flow->skb_priority = ntohl(value->be32);
1146 flow->pkt_mark = ntohl(value->be32);
1150 flow->regs[mf->id - MFF_REG0] = ntohl(value->be32);
1154 flow_set_xreg(flow, mf->id - MFF_XREG0, ntohll(value->be64));
1158 flow->dl_src = value->mac;
1162 flow->dl_dst = value->mac;
1166 flow->dl_type = value->be16;
1170 flow->vlan_tci = value->be16;
1174 flow_set_dl_vlan(flow, value->be16);
1177 flow_set_vlan_vid(flow, value->be16);
1180 case MFF_DL_VLAN_PCP:
1182 flow_set_vlan_pcp(flow, value->u8);
1185 case MFF_MPLS_LABEL:
1186 flow_set_mpls_label(flow, 0, value->be32);
1190 flow_set_mpls_tc(flow, 0, value->u8);
1194 flow_set_mpls_bos(flow, 0, value->u8);
1198 flow->nw_src = value->be32;
1202 flow->nw_dst = value->be32;
1206 flow->ipv6_src = value->ipv6;
1210 flow->ipv6_dst = value->ipv6;
1213 case MFF_IPV6_LABEL:
1214 flow->ipv6_label = value->be32 & htonl(IPV6_LABEL_MASK);
1218 flow->nw_proto = value->u8;
1222 flow->nw_tos &= ~IP_DSCP_MASK;
1223 flow->nw_tos |= value->u8 & IP_DSCP_MASK;
1226 case MFF_IP_DSCP_SHIFTED:
1227 flow->nw_tos &= ~IP_DSCP_MASK;
1228 flow->nw_tos |= value->u8 << 2;
1232 flow->nw_tos &= ~IP_ECN_MASK;
1233 flow->nw_tos |= value->u8 & IP_ECN_MASK;
1237 flow->nw_ttl = value->u8;
1241 flow->nw_frag = value->u8 & FLOW_NW_FRAG_MASK;
1245 flow->nw_proto = ntohs(value->be16);
1249 flow->nw_src = value->be32;
1253 flow->nw_dst = value->be32;
1258 flow->arp_sha = value->mac;
1263 flow->arp_tha = value->mac;
1269 flow->tp_src = value->be16;
1275 flow->tp_dst = value->be16;
1279 flow->tcp_flags = value->be16;
1282 case MFF_ICMPV4_TYPE:
1283 case MFF_ICMPV6_TYPE:
1284 flow->tp_src = htons(value->u8);
1287 case MFF_ICMPV4_CODE:
1288 case MFF_ICMPV6_CODE:
1289 flow->tp_dst = htons(value->u8);
1293 flow->nd_target = value->ipv6;
1302 /* Consider each of 'src', 'mask', and 'dst' as if they were arrays of 8*n
1303 * bits. Then, for each 0 <= i < 8 * n such that mask[i] == 1, sets dst[i] =
1306 apply_mask(const uint8_t *src, const uint8_t *mask, uint8_t *dst, size_t n)
1310 for (i = 0; i < n; i++) {
1311 dst[i] = (src[i] & mask[i]) | (dst[i] & ~mask[i]);
1315 /* Sets 'flow' member field described by 'field' to 'value', except that bits
1316 * for which 'mask' has a 0-bit keep their existing values. The caller is
1317 * responsible for ensuring that 'flow' meets 'field''s prerequisites.*/
1319 mf_set_flow_value_masked(const struct mf_field *field,
1320 const union mf_value *value,
1321 const union mf_value *mask,
1326 mf_get_value(field, flow, &tmp);
1327 apply_mask((const uint8_t *) value, (const uint8_t *) mask,
1328 (uint8_t *) &tmp, field->n_bytes);
1329 mf_set_flow_value(field, &tmp, flow);
1332 /* Returns true if 'mf' has a zero value in 'flow', false if it is nonzero.
1334 * The caller is responsible for ensuring that 'flow' meets 'mf''s
1337 mf_is_zero(const struct mf_field *mf, const struct flow *flow)
1339 union mf_value value;
1341 mf_get_value(mf, flow, &value);
1342 return is_all_zeros(&value, mf->n_bytes);
1345 /* Makes 'match' wildcard field 'mf'.
1347 * The caller is responsible for ensuring that 'match' meets 'mf''s
1350 mf_set_wild(const struct mf_field *mf, struct match *match)
1354 match->flow.dp_hash = 0;
1355 match->wc.masks.dp_hash = 0;
1358 match->flow.recirc_id = 0;
1359 match->wc.masks.recirc_id = 0;
1362 match->flow.conj_id = 0;
1363 match->wc.masks.conj_id = 0;
1366 match_set_tun_id_masked(match, htonll(0), htonll(0));
1369 match_set_tun_src_masked(match, htonl(0), htonl(0));
1372 match_set_tun_dst_masked(match, htonl(0), htonl(0));
1375 match_set_tun_flags_masked(match, 0, 0);
1377 case MFF_TUN_GBP_ID:
1378 match_set_tun_gbp_id_masked(match, 0, 0);
1380 case MFF_TUN_GBP_FLAGS:
1381 match_set_tun_gbp_flags_masked(match, 0, 0);
1384 match_set_tun_tos_masked(match, 0, 0);
1387 match_set_tun_ttl_masked(match, 0, 0);
1389 CASE_MFF_TUN_METADATA:
1390 tun_metadata_set_match(mf, NULL, NULL, match);
1394 match_set_metadata_masked(match, htonll(0), htonll(0));
1398 case MFF_IN_PORT_OXM:
1399 match->flow.in_port.ofp_port = 0;
1400 match->wc.masks.in_port.ofp_port = 0;
1402 case MFF_ACTSET_OUTPUT:
1403 match->flow.actset_output = 0;
1404 match->wc.masks.actset_output = 0;
1407 case MFF_SKB_PRIORITY:
1408 match->flow.skb_priority = 0;
1409 match->wc.masks.skb_priority = 0;
1413 match->flow.pkt_mark = 0;
1414 match->wc.masks.pkt_mark = 0;
1418 match_set_reg_masked(match, mf->id - MFF_REG0, 0, 0);
1422 match_set_xreg_masked(match, mf->id - MFF_XREG0, 0, 0);
1426 match->flow.dl_src = eth_addr_zero;
1427 match->wc.masks.dl_src = eth_addr_zero;
1431 match->flow.dl_dst = eth_addr_zero;
1432 match->wc.masks.dl_dst = eth_addr_zero;
1436 match->flow.dl_type = htons(0);
1437 match->wc.masks.dl_type = htons(0);
1441 match_set_dl_tci_masked(match, htons(0), htons(0));
1446 match_set_any_vid(match);
1449 case MFF_DL_VLAN_PCP:
1451 match_set_any_pcp(match);
1454 case MFF_MPLS_LABEL:
1455 match_set_any_mpls_label(match, 0);
1459 match_set_any_mpls_tc(match, 0);
1463 match_set_any_mpls_bos(match, 0);
1468 match_set_nw_src_masked(match, htonl(0), htonl(0));
1473 match_set_nw_dst_masked(match, htonl(0), htonl(0));
1477 memset(&match->wc.masks.ipv6_src, 0, sizeof match->wc.masks.ipv6_src);
1478 memset(&match->flow.ipv6_src, 0, sizeof match->flow.ipv6_src);
1482 memset(&match->wc.masks.ipv6_dst, 0, sizeof match->wc.masks.ipv6_dst);
1483 memset(&match->flow.ipv6_dst, 0, sizeof match->flow.ipv6_dst);
1486 case MFF_IPV6_LABEL:
1487 match->wc.masks.ipv6_label = htonl(0);
1488 match->flow.ipv6_label = htonl(0);
1492 match->wc.masks.nw_proto = 0;
1493 match->flow.nw_proto = 0;
1497 case MFF_IP_DSCP_SHIFTED:
1498 match->wc.masks.nw_tos &= ~IP_DSCP_MASK;
1499 match->flow.nw_tos &= ~IP_DSCP_MASK;
1503 match->wc.masks.nw_tos &= ~IP_ECN_MASK;
1504 match->flow.nw_tos &= ~IP_ECN_MASK;
1508 match->wc.masks.nw_ttl = 0;
1509 match->flow.nw_ttl = 0;
1513 match->wc.masks.nw_frag &= ~FLOW_NW_FRAG_MASK;
1514 match->flow.nw_frag &= ~FLOW_NW_FRAG_MASK;
1518 match->wc.masks.nw_proto = 0;
1519 match->flow.nw_proto = 0;
1524 match->flow.arp_sha = eth_addr_zero;
1525 match->wc.masks.arp_sha = eth_addr_zero;
1530 match->flow.arp_tha = eth_addr_zero;
1531 match->wc.masks.arp_tha = eth_addr_zero;
1537 case MFF_ICMPV4_TYPE:
1538 case MFF_ICMPV6_TYPE:
1539 match->wc.masks.tp_src = htons(0);
1540 match->flow.tp_src = htons(0);
1546 case MFF_ICMPV4_CODE:
1547 case MFF_ICMPV6_CODE:
1548 match->wc.masks.tp_dst = htons(0);
1549 match->flow.tp_dst = htons(0);
1553 match->wc.masks.tcp_flags = htons(0);
1554 match->flow.tcp_flags = htons(0);
1558 memset(&match->wc.masks.nd_target, 0,
1559 sizeof match->wc.masks.nd_target);
1560 memset(&match->flow.nd_target, 0, sizeof match->flow.nd_target);
1569 /* Makes 'match' match field 'mf' with the specified 'value' and 'mask'.
1570 * 'value' specifies a value to match and 'mask' specifies a wildcard pattern,
1571 * with a 1-bit indicating that the corresponding value bit must match and a
1572 * 0-bit indicating a don't-care.
1574 * If 'mask' is NULL or points to all-1-bits, then this call is equivalent to
1575 * mf_set_value(mf, value, match). If 'mask' points to all-0-bits, then this
1576 * call is equivalent to mf_set_wild(mf, match).
1578 * 'mask' must be a valid mask for 'mf' (see mf_is_mask_valid()). The caller
1579 * is responsible for ensuring that 'match' meets 'mf''s prerequisites. */
1580 enum ofputil_protocol
1581 mf_set(const struct mf_field *mf,
1582 const union mf_value *value, const union mf_value *mask,
1583 struct match *match)
1585 if (!mask || is_all_ones(mask, mf->n_bytes)) {
1586 mf_set_value(mf, value, match);
1587 return mf->usable_protocols_exact;
1588 } else if (is_all_zeros(mask, mf->n_bytes)) {
1589 mf_set_wild(mf, match);
1590 return OFPUTIL_P_ANY;
1597 case MFF_IN_PORT_OXM:
1598 case MFF_ACTSET_OUTPUT:
1599 case MFF_SKB_PRIORITY:
1602 case MFF_DL_VLAN_PCP:
1604 case MFF_MPLS_LABEL:
1610 case MFF_IP_DSCP_SHIFTED:
1613 case MFF_ICMPV4_TYPE:
1614 case MFF_ICMPV4_CODE:
1615 case MFF_ICMPV6_TYPE:
1616 case MFF_ICMPV6_CODE:
1617 return OFPUTIL_P_NONE;
1620 match_set_dp_hash_masked(match, ntohl(value->be32), ntohl(mask->be32));
1623 match_set_tun_id_masked(match, value->be64, mask->be64);
1626 match_set_tun_src_masked(match, value->be32, mask->be32);
1629 match_set_tun_dst_masked(match, value->be32, mask->be32);
1632 match_set_tun_flags_masked(match, ntohs(value->be16), ntohs(mask->be16));
1634 case MFF_TUN_GBP_ID:
1635 match_set_tun_gbp_id_masked(match, value->be16, mask->be16);
1637 case MFF_TUN_GBP_FLAGS:
1638 match_set_tun_gbp_flags_masked(match, value->u8, mask->u8);
1641 match_set_tun_ttl_masked(match, value->u8, mask->u8);
1644 match_set_tun_tos_masked(match, value->u8, mask->u8);
1646 CASE_MFF_TUN_METADATA:
1647 tun_metadata_set_match(mf, value, mask, match);
1651 match_set_metadata_masked(match, value->be64, mask->be64);
1655 match_set_reg_masked(match, mf->id - MFF_REG0,
1656 ntohl(value->be32), ntohl(mask->be32));
1660 match_set_xreg_masked(match, mf->id - MFF_XREG0,
1661 ntohll(value->be64), ntohll(mask->be64));
1665 match_set_pkt_mark_masked(match, ntohl(value->be32),
1670 match_set_dl_dst_masked(match, value->mac, mask->mac);
1674 match_set_dl_src_masked(match, value->mac, mask->mac);
1679 match_set_arp_sha_masked(match, value->mac, mask->mac);
1684 match_set_arp_tha_masked(match, value->mac, mask->mac);
1688 match_set_dl_tci_masked(match, value->be16, mask->be16);
1692 match_set_vlan_vid_masked(match, value->be16, mask->be16);
1696 match_set_nw_src_masked(match, value->be32, mask->be32);
1700 match_set_nw_dst_masked(match, value->be32, mask->be32);
1704 match_set_ipv6_src_masked(match, &value->ipv6, &mask->ipv6);
1708 match_set_ipv6_dst_masked(match, &value->ipv6, &mask->ipv6);
1711 case MFF_IPV6_LABEL:
1712 if ((mask->be32 & htonl(IPV6_LABEL_MASK)) == htonl(IPV6_LABEL_MASK)) {
1713 mf_set_value(mf, value, match);
1715 match_set_ipv6_label_masked(match, value->be32, mask->be32);
1720 match_set_nd_target_masked(match, &value->ipv6, &mask->ipv6);
1724 match_set_nw_frag_masked(match, value->u8, mask->u8);
1728 match_set_nw_src_masked(match, value->be32, mask->be32);
1732 match_set_nw_dst_masked(match, value->be32, mask->be32);
1738 match_set_tp_src_masked(match, value->be16, mask->be16);
1744 match_set_tp_dst_masked(match, value->be16, mask->be16);
1748 match_set_tcp_flags_masked(match, value->be16, mask->be16);
1756 return ((mf->usable_protocols_bitwise == mf->usable_protocols_cidr
1757 || ip_is_cidr(mask->be32))
1758 ? mf->usable_protocols_cidr
1759 : mf->usable_protocols_bitwise);
1763 mf_check__(const struct mf_subfield *sf, const struct flow *flow,
1767 VLOG_WARN_RL(&rl, "unknown %s field", type);
1768 return OFPERR_OFPBAC_BAD_SET_TYPE;
1769 } else if (!sf->n_bits) {
1770 VLOG_WARN_RL(&rl, "zero bit %s field %s", type, sf->field->name);
1771 return OFPERR_OFPBAC_BAD_SET_LEN;
1772 } else if (sf->ofs >= sf->field->n_bits) {
1773 VLOG_WARN_RL(&rl, "bit offset %d exceeds %d-bit width of %s field %s",
1774 sf->ofs, sf->field->n_bits, type, sf->field->name);
1775 return OFPERR_OFPBAC_BAD_SET_LEN;
1776 } else if (sf->ofs + sf->n_bits > sf->field->n_bits) {
1777 VLOG_WARN_RL(&rl, "bit offset %d and width %d exceeds %d-bit width "
1778 "of %s field %s", sf->ofs, sf->n_bits,
1779 sf->field->n_bits, type, sf->field->name);
1780 return OFPERR_OFPBAC_BAD_SET_LEN;
1781 } else if (flow && !mf_are_prereqs_ok(sf->field, flow)) {
1782 VLOG_WARN_RL(&rl, "%s field %s lacks correct prerequisites",
1783 type, sf->field->name);
1784 return OFPERR_OFPBAC_MATCH_INCONSISTENT;
1790 /* Checks whether 'sf' is valid for reading a subfield out of 'flow'. Returns
1791 * 0 if so, otherwise an OpenFlow error code (e.g. as returned by
1794 mf_check_src(const struct mf_subfield *sf, const struct flow *flow)
1796 return mf_check__(sf, flow, "source");
1799 /* Checks whether 'sf' is valid for writing a subfield into 'flow'. Returns 0
1800 * if so, otherwise an OpenFlow error code (e.g. as returned by
1803 mf_check_dst(const struct mf_subfield *sf, const struct flow *flow)
1805 int error = mf_check__(sf, flow, "destination");
1806 if (!error && !sf->field->writable) {
1807 VLOG_WARN_RL(&rl, "destination field %s is not writable",
1809 return OFPERR_OFPBAC_BAD_SET_ARGUMENT;
1814 /* Copies the value and wildcard bit pattern for 'mf' from 'match' into the
1815 * 'value' and 'mask', respectively. */
1817 mf_get(const struct mf_field *mf, const struct match *match,
1818 union mf_value *value, union mf_value *mask)
1820 mf_get_value(mf, &match->flow, value);
1821 mf_get_mask(mf, &match->wc, mask);
1825 mf_from_integer_string(const struct mf_field *mf, const char *s,
1826 uint8_t *valuep, uint8_t *maskp)
1829 const char *err_str = "";
1832 err = parse_int_string(s, valuep, mf->n_bytes, &tail);
1833 if (err || (*tail != '\0' && *tail != '/')) {
1839 err = parse_int_string(tail + 1, maskp, mf->n_bytes, &tail);
1840 if (err || *tail != '\0') {
1845 memset(maskp, 0xff, mf->n_bytes);
1851 if (err == ERANGE) {
1852 return xasprintf("%s: %s too large for %u-byte field %s",
1853 s, err_str, mf->n_bytes, mf->name);
1855 return xasprintf("%s: bad syntax for %s %s", s, mf->name, err_str);
1860 mf_from_ethernet_string(const struct mf_field *mf, const char *s,
1861 struct eth_addr *mac, struct eth_addr *mask)
1865 ovs_assert(mf->n_bytes == ETH_ADDR_LEN);
1868 if (ovs_scan(s, ETH_ADDR_SCAN_FMT"%n", ETH_ADDR_SCAN_ARGS(*mac), &n)
1869 && n == strlen(s)) {
1870 *mask = eth_addr_exact;
1875 if (ovs_scan(s, ETH_ADDR_SCAN_FMT"/"ETH_ADDR_SCAN_FMT"%n",
1876 ETH_ADDR_SCAN_ARGS(*mac), ETH_ADDR_SCAN_ARGS(*mask), &n)
1877 && n == strlen(s)) {
1881 return xasprintf("%s: invalid Ethernet address", s);
1885 mf_from_ipv4_string(const struct mf_field *mf, const char *s,
1886 ovs_be32 *ip, ovs_be32 *mask)
1890 ovs_assert(mf->n_bytes == sizeof *ip);
1892 if (ovs_scan(s, IP_SCAN_FMT"/"IP_SCAN_FMT,
1893 IP_SCAN_ARGS(ip), IP_SCAN_ARGS(mask))) {
1895 } else if (ovs_scan(s, IP_SCAN_FMT"/%d", IP_SCAN_ARGS(ip), &prefix)) {
1896 if (prefix <= 0 || prefix > 32) {
1897 return xasprintf("%s: network prefix bits not between 0 and "
1900 *mask = be32_prefix_mask(prefix);
1901 } else if (ovs_scan(s, IP_SCAN_FMT, IP_SCAN_ARGS(ip))) {
1902 *mask = OVS_BE32_MAX;
1904 return xasprintf("%s: invalid IP address", s);
1910 mf_from_ipv6_string(const struct mf_field *mf, const char *s,
1911 struct in6_addr *value, struct in6_addr *mask)
1913 char *str = xstrdup(s);
1914 char *save_ptr = NULL;
1915 const char *name, *netmask;
1918 ovs_assert(mf->n_bytes == sizeof *value);
1920 name = strtok_r(str, "/", &save_ptr);
1921 retval = name ? lookup_ipv6(name, value) : EINVAL;
1925 err = xasprintf("%s: could not convert to IPv6 address", str);
1931 netmask = strtok_r(NULL, "/", &save_ptr);
1933 if (inet_pton(AF_INET6, netmask, mask) != 1) {
1934 int prefix = atoi(netmask);
1935 if (prefix <= 0 || prefix > 128) {
1937 return xasprintf("%s: prefix bits not between 1 and 128", s);
1939 *mask = ipv6_create_mask(prefix);
1943 *mask = in6addr_exact;
1951 mf_from_ofp_port_string(const struct mf_field *mf, const char *s,
1952 ovs_be16 *valuep, ovs_be16 *maskp)
1956 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
1958 if (ofputil_port_from_string(s, &port)) {
1959 *valuep = htons(ofp_to_u16(port));
1960 *maskp = OVS_BE16_MAX;
1963 return xasprintf("%s: port value out of range for %s", s, mf->name);
1967 mf_from_ofp_port_string32(const struct mf_field *mf, const char *s,
1968 ovs_be32 *valuep, ovs_be32 *maskp)
1972 ovs_assert(mf->n_bytes == sizeof(ovs_be32));
1973 if (ofputil_port_from_string(s, &port)) {
1974 *valuep = ofputil_port_to_ofp11(port);
1975 *maskp = OVS_BE32_MAX;
1978 return xasprintf("%s: port value out of range for %s", s, mf->name);
1981 struct frag_handling {
1987 static const struct frag_handling all_frags[] = {
1988 #define A FLOW_NW_FRAG_ANY
1989 #define L FLOW_NW_FRAG_LATER
1990 /* name mask value */
1993 { "first", A|L, A },
1994 { "later", A|L, A|L },
1999 { "not_later", L, 0 },
2006 mf_from_frag_string(const char *s, uint8_t *valuep, uint8_t *maskp)
2008 const struct frag_handling *h;
2010 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2011 if (!strcasecmp(s, h->name)) {
2012 /* We force the upper bits of the mask on to make mf_parse_value()
2013 * happy (otherwise it will never think it's an exact match.) */
2014 *maskp = h->mask | ~FLOW_NW_FRAG_MASK;
2020 return xasprintf("%s: unknown fragment type (valid types are \"no\", "
2021 "\"yes\", \"first\", \"later\", \"not_first\"", s);
2025 parse_mf_flags(const char *s, const char *(*bit_to_string)(uint32_t),
2026 const char *field_name, ovs_be16 *flagsp, ovs_be16 allowed,
2031 uint32_t flags, mask;
2033 err = parse_flags(s, bit_to_string, '\0', field_name, &err_str,
2034 &flags, ntohs(allowed), maskp ? &mask : NULL);
2039 *flagsp = htons(flags);
2041 *maskp = htons(mask);
2048 mf_from_tcp_flags_string(const char *s, ovs_be16 *flagsp, ovs_be16 *maskp)
2050 return parse_mf_flags(s, packet_tcp_flag_to_string, "TCP", flagsp,
2051 TCP_FLAGS_BE16(OVS_BE16_MAX), maskp);
2055 mf_from_tun_flags_string(const char *s, ovs_be16 *flagsp, ovs_be16 *maskp)
2057 return parse_mf_flags(s, flow_tun_flag_to_string, "tunnel", flagsp,
2058 htons(FLOW_TNL_PUB_F_MASK), maskp);
2061 /* Parses 's', a string value for field 'mf', into 'value' and 'mask'. Returns
2062 * NULL if successful, otherwise a malloc()'d string describing the error. */
2064 mf_parse(const struct mf_field *mf, const char *s,
2065 union mf_value *value, union mf_value *mask)
2069 if (!strcmp(s, "*")) {
2070 memset(value, 0, mf->n_bytes);
2071 memset(mask, 0, mf->n_bytes);
2075 switch (mf->string) {
2077 case MFS_HEXADECIMAL:
2078 error = mf_from_integer_string(mf, s,
2079 (uint8_t *) value, (uint8_t *) mask);
2083 error = mf_from_ethernet_string(mf, s, &value->mac, &mask->mac);
2087 error = mf_from_ipv4_string(mf, s, &value->be32, &mask->be32);
2091 error = mf_from_ipv6_string(mf, s, &value->ipv6, &mask->ipv6);
2095 error = mf_from_ofp_port_string(mf, s, &value->be16, &mask->be16);
2098 case MFS_OFP_PORT_OXM:
2099 error = mf_from_ofp_port_string32(mf, s, &value->be32, &mask->be32);
2103 error = mf_from_frag_string(s, &value->u8, &mask->u8);
2107 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2108 error = mf_from_tun_flags_string(s, &value->be16, &mask->be16);
2112 ovs_assert(mf->n_bytes == sizeof(ovs_be16));
2113 error = mf_from_tcp_flags_string(s, &value->be16, &mask->be16);
2120 if (!error && !mf_is_mask_valid(mf, mask)) {
2121 error = xasprintf("%s: invalid mask for field %s", s, mf->name);
2126 /* Parses 's', a string value for field 'mf', into 'value'. Returns NULL if
2127 * successful, otherwise a malloc()'d string describing the error. */
2129 mf_parse_value(const struct mf_field *mf, const char *s, union mf_value *value)
2131 union mf_value mask;
2134 error = mf_parse(mf, s, value, &mask);
2139 if (!is_all_ones((const uint8_t *) &mask, mf->n_bytes)) {
2140 return xasprintf("%s: wildcards not allowed here", s);
2146 mf_format_integer_string(const struct mf_field *mf, const uint8_t *valuep,
2147 const uint8_t *maskp, struct ds *s)
2149 if (mf->string == MFS_HEXADECIMAL) {
2150 ds_put_hex(s, valuep, mf->n_bytes);
2152 unsigned long long int integer = 0;
2155 ovs_assert(mf->n_bytes <= 8);
2156 for (i = 0; i < mf->n_bytes; i++) {
2157 integer = (integer << 8) | valuep[i];
2159 ds_put_format(s, "%lld", integer);
2163 /* I guess we could write the mask in decimal for MFS_DECIMAL but I'm
2164 * not sure that that a bit-mask written in decimal is ever easier to
2165 * understand than the same bit-mask written in hexadecimal. */
2166 ds_put_char(s, '/');
2167 ds_put_hex(s, maskp, mf->n_bytes);
2172 mf_format_frag_string(uint8_t value, uint8_t mask, struct ds *s)
2174 const struct frag_handling *h;
2176 mask &= FLOW_NW_FRAG_MASK;
2179 for (h = all_frags; h < &all_frags[ARRAY_SIZE(all_frags)]; h++) {
2180 if (value == h->value && mask == h->mask) {
2181 ds_put_cstr(s, h->name);
2185 ds_put_cstr(s, "<error>");
2189 mf_format_tnl_flags_string(ovs_be16 value, ovs_be16 mask, struct ds *s)
2191 format_flags_masked(s, NULL, flow_tun_flag_to_string, ntohs(value),
2192 ntohs(mask) & FLOW_TNL_PUB_F_MASK, FLOW_TNL_PUB_F_MASK);
2196 mf_format_tcp_flags_string(ovs_be16 value, ovs_be16 mask, struct ds *s)
2198 format_flags_masked(s, NULL, packet_tcp_flag_to_string, ntohs(value),
2199 TCP_FLAGS(mask), TCP_FLAGS(OVS_BE16_MAX));
2202 /* Appends to 's' a string representation of field 'mf' whose value is in
2203 * 'value' and 'mask'. 'mask' may be NULL to indicate an exact match. */
2205 mf_format(const struct mf_field *mf,
2206 const union mf_value *value, const union mf_value *mask,
2210 if (is_all_zeros(mask, mf->n_bytes)) {
2211 ds_put_cstr(s, "ANY");
2213 } else if (is_all_ones(mask, mf->n_bytes)) {
2218 switch (mf->string) {
2219 case MFS_OFP_PORT_OXM:
2222 ofputil_port_from_ofp11(value->be32, &port);
2223 ofputil_format_port(port, s);
2229 ofputil_format_port(u16_to_ofp(ntohs(value->be16)), s);
2234 case MFS_HEXADECIMAL:
2235 mf_format_integer_string(mf, (uint8_t *) value, (uint8_t *) mask, s);
2239 eth_format_masked(value->mac, mask ? &mask->mac : NULL, s);
2243 ip_format_masked(value->be32, mask ? mask->be32 : OVS_BE32_MAX, s);
2247 print_ipv6_masked(s, &value->ipv6, mask ? &mask->ipv6 : NULL);
2251 mf_format_frag_string(value->u8, mask ? mask->u8 : UINT8_MAX, s);
2255 mf_format_tnl_flags_string(value->be16,
2256 mask ? mask->be16 : OVS_BE16_MAX, s);
2260 mf_format_tcp_flags_string(value->be16,
2261 mask ? mask->be16 : OVS_BE16_MAX, s);
2269 /* Makes subfield 'sf' within 'flow' exactly match the 'sf->n_bits'
2270 * least-significant bits in 'x'.
2273 mf_write_subfield_flow(const struct mf_subfield *sf,
2274 const union mf_subvalue *x, struct flow *flow)
2276 const struct mf_field *field = sf->field;
2277 union mf_value value;
2279 mf_get_value(field, flow, &value);
2280 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes,
2281 sf->ofs, sf->n_bits);
2282 mf_set_flow_value(field, &value, flow);
2285 /* Makes subfield 'sf' within 'match' exactly match the 'sf->n_bits'
2286 * least-significant bits in 'x'.
2289 mf_write_subfield(const struct mf_subfield *sf, const union mf_subvalue *x,
2290 struct match *match)
2292 const struct mf_field *field = sf->field;
2293 union mf_value value, mask;
2295 mf_get(field, match, &value, &mask);
2296 bitwise_copy(x, sizeof *x, 0, &value, field->n_bytes, sf->ofs, sf->n_bits);
2297 bitwise_one ( &mask, field->n_bytes, sf->ofs, sf->n_bits);
2298 mf_set(field, &value, &mask, match);
2301 /* 'v' and 'm' correspond to values of 'field'. This function copies them into
2302 * 'match' in the correspond positions. */
2304 mf_mask_subfield(const struct mf_field *field,
2305 const union mf_subvalue *v,
2306 const union mf_subvalue *m,
2307 struct match *match)
2309 union mf_value value, mask;
2311 mf_get(field, match, &value, &mask);
2312 bitwise_copy(v, sizeof *v, 0, &value, field->n_bytes, 0, field->n_bits);
2313 bitwise_copy(m, sizeof *m, 0, &mask, field->n_bytes, 0, field->n_bits);
2314 mf_set(field, &value, &mask, match);
2317 /* Initializes 'x' to the value of 'sf' within 'flow'. 'sf' must be valid for
2318 * reading 'flow', e.g. as checked by mf_check_src(). */
2320 mf_read_subfield(const struct mf_subfield *sf, const struct flow *flow,
2321 union mf_subvalue *x)
2323 union mf_value value;
2325 mf_get_value(sf->field, flow, &value);
2327 memset(x, 0, sizeof *x);
2328 bitwise_copy(&value, sf->field->n_bytes, sf->ofs,
2333 /* Returns the value of 'sf' within 'flow'. 'sf' must be valid for reading
2334 * 'flow', e.g. as checked by mf_check_src() and sf->n_bits must be 64 or
2337 mf_get_subfield(const struct mf_subfield *sf, const struct flow *flow)
2339 union mf_value value;
2341 mf_get_value(sf->field, flow, &value);
2342 return bitwise_get(&value, sf->field->n_bytes, sf->ofs, sf->n_bits);
2346 mf_format_subvalue(const union mf_subvalue *subvalue, struct ds *s)
2348 ds_put_hex(s, subvalue->u8, sizeof subvalue->u8);
2352 field_array_set(enum mf_field_id id, const union mf_value *value,
2353 struct field_array *fa)
2355 ovs_assert(id < MFF_N_IDS);
2356 bitmap_set1(fa->used.bm, id);
2357 fa->value[id] = *value;