2 * Copyright (c) 2009, 2010, 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.
20 #include "byte-order.h"
21 #include "dynamic-string.h"
24 #include "tun-metadata.h"
26 /* Converts the flow in 'flow' into a match in 'match', with the given
29 match_init(struct match
*match
,
30 const struct flow
*flow
, const struct flow_wildcards
*wc
)
34 match_zero_wildcarded_fields(match
);
35 memset(&match
->tun_md
, 0, sizeof match
->tun_md
);
38 /* Converts a flow into a match. It sets the wildcard masks based on
39 * the packet contents. It will not set the mask for fields that do not
40 * make sense for the packet type. */
42 match_wc_init(struct match
*match
, const struct flow
*flow
)
46 flow_wildcards_init_for_packet(&match
->wc
, flow
);
47 WC_MASK_FIELD(&match
->wc
, regs
);
48 WC_MASK_FIELD(&match
->wc
, metadata
);
50 memset(&match
->tun_md
, 0, sizeof match
->tun_md
);
53 /* Initializes 'match' as a "catch-all" match that matches every packet. */
55 match_init_catchall(struct match
*match
)
57 memset(&match
->flow
, 0, sizeof match
->flow
);
58 flow_wildcards_init_catchall(&match
->wc
);
59 memset(&match
->tun_md
, 0, sizeof match
->tun_md
);
62 /* For each bit or field wildcarded in 'match', sets the corresponding bit or
63 * field in 'flow' to all-0-bits. It is important to maintain this invariant
64 * in a match that might be inserted into a classifier.
66 * It is never necessary to call this function directly for a match that is
67 * initialized or modified only by match_*() functions. It is useful to
68 * restore the invariant in a match whose 'wc' member is modified by hand.
71 match_zero_wildcarded_fields(struct match
*match
)
73 flow_zero_wildcards(&match
->flow
, &match
->wc
);
77 match_set_dp_hash(struct match
*match
, uint32_t value
)
79 match_set_dp_hash_masked(match
, value
, UINT32_MAX
);
83 match_set_dp_hash_masked(struct match
*match
, uint32_t value
, uint32_t mask
)
85 match
->wc
.masks
.dp_hash
= mask
;
86 match
->flow
.dp_hash
= value
& mask
;
90 match_set_recirc_id(struct match
*match
, uint32_t value
)
92 match
->flow
.recirc_id
= value
;
93 match
->wc
.masks
.recirc_id
= UINT32_MAX
;
97 match_set_conj_id(struct match
*match
, uint32_t value
)
99 match
->flow
.conj_id
= value
;
100 match
->wc
.masks
.conj_id
= UINT32_MAX
;
104 match_set_reg(struct match
*match
, unsigned int reg_idx
, uint32_t value
)
106 match_set_reg_masked(match
, reg_idx
, value
, UINT32_MAX
);
110 match_set_reg_masked(struct match
*match
, unsigned int reg_idx
,
111 uint32_t value
, uint32_t mask
)
113 ovs_assert(reg_idx
< FLOW_N_REGS
);
114 flow_wildcards_set_reg_mask(&match
->wc
, reg_idx
, mask
);
115 match
->flow
.regs
[reg_idx
] = value
& mask
;
119 match_set_xreg(struct match
*match
, unsigned int xreg_idx
, uint64_t value
)
121 match_set_xreg_masked(match
, xreg_idx
, value
, UINT64_MAX
);
125 match_set_xreg_masked(struct match
*match
, unsigned int xreg_idx
,
126 uint64_t value
, uint64_t mask
)
128 ovs_assert(xreg_idx
< FLOW_N_XREGS
);
129 flow_wildcards_set_xreg_mask(&match
->wc
, xreg_idx
, mask
);
130 flow_set_xreg(&match
->flow
, xreg_idx
, value
& mask
);
134 match_set_actset_output(struct match
*match
, ofp_port_t actset_output
)
136 match
->wc
.masks
.actset_output
= u16_to_ofp(UINT16_MAX
);
137 match
->flow
.actset_output
= actset_output
;
141 match_set_metadata(struct match
*match
, ovs_be64 metadata
)
143 match_set_metadata_masked(match
, metadata
, OVS_BE64_MAX
);
147 match_set_metadata_masked(struct match
*match
,
148 ovs_be64 metadata
, ovs_be64 mask
)
150 match
->wc
.masks
.metadata
= mask
;
151 match
->flow
.metadata
= metadata
& mask
;
155 match_set_tun_id(struct match
*match
, ovs_be64 tun_id
)
157 match_set_tun_id_masked(match
, tun_id
, OVS_BE64_MAX
);
161 match_set_tun_id_masked(struct match
*match
, ovs_be64 tun_id
, ovs_be64 mask
)
163 match
->wc
.masks
.tunnel
.tun_id
= mask
;
164 match
->flow
.tunnel
.tun_id
= tun_id
& mask
;
168 match_set_tun_src(struct match
*match
, ovs_be32 src
)
170 match_set_tun_src_masked(match
, src
, OVS_BE32_MAX
);
174 match_set_tun_src_masked(struct match
*match
, ovs_be32 src
, ovs_be32 mask
)
176 match
->wc
.masks
.tunnel
.ip_src
= mask
;
177 match
->flow
.tunnel
.ip_src
= src
& mask
;
181 match_set_tun_dst(struct match
*match
, ovs_be32 dst
)
183 match_set_tun_dst_masked(match
, dst
, OVS_BE32_MAX
);
187 match_set_tun_dst_masked(struct match
*match
, ovs_be32 dst
, ovs_be32 mask
)
189 match
->wc
.masks
.tunnel
.ip_dst
= mask
;
190 match
->flow
.tunnel
.ip_dst
= dst
& mask
;
194 match_set_tun_ttl(struct match
*match
, uint8_t ttl
)
196 match_set_tun_ttl_masked(match
, ttl
, UINT8_MAX
);
200 match_set_tun_ttl_masked(struct match
*match
, uint8_t ttl
, uint8_t mask
)
202 match
->wc
.masks
.tunnel
.ip_ttl
= mask
;
203 match
->flow
.tunnel
.ip_ttl
= ttl
& mask
;
207 match_set_tun_tos(struct match
*match
, uint8_t tos
)
209 match_set_tun_tos_masked(match
, tos
, UINT8_MAX
);
213 match_set_tun_tos_masked(struct match
*match
, uint8_t tos
, uint8_t mask
)
215 match
->wc
.masks
.tunnel
.ip_tos
= mask
;
216 match
->flow
.tunnel
.ip_tos
= tos
& mask
;
220 match_set_tun_flags(struct match
*match
, uint16_t flags
)
222 match_set_tun_flags_masked(match
, flags
, UINT16_MAX
);
226 match_set_tun_flags_masked(struct match
*match
, uint16_t flags
, uint16_t mask
)
228 mask
&= FLOW_TNL_PUB_F_MASK
;
230 match
->wc
.masks
.tunnel
.flags
= mask
;
231 match
->flow
.tunnel
.flags
= flags
& mask
;
235 match_set_tun_gbp_id_masked(struct match
*match
, ovs_be16 gbp_id
, ovs_be16 mask
)
237 match
->wc
.masks
.tunnel
.gbp_id
= mask
;
238 match
->flow
.tunnel
.gbp_id
= gbp_id
& mask
;
242 match_set_tun_gbp_id(struct match
*match
, ovs_be16 gbp_id
)
244 match_set_tun_gbp_id_masked(match
, gbp_id
, OVS_BE16_MAX
);
248 match_set_tun_gbp_flags_masked(struct match
*match
, uint8_t flags
, uint8_t mask
)
250 match
->wc
.masks
.tunnel
.gbp_flags
= mask
;
251 match
->flow
.tunnel
.gbp_flags
= flags
& mask
;
255 match_set_tun_gbp_flags(struct match
*match
, uint8_t flags
)
257 match_set_tun_gbp_flags_masked(match
, flags
, UINT8_MAX
);
261 match_set_in_port(struct match
*match
, ofp_port_t ofp_port
)
263 match
->wc
.masks
.in_port
.ofp_port
= u16_to_ofp(UINT16_MAX
);
264 match
->flow
.in_port
.ofp_port
= ofp_port
;
268 match_set_skb_priority(struct match
*match
, uint32_t skb_priority
)
270 match
->wc
.masks
.skb_priority
= UINT32_MAX
;
271 match
->flow
.skb_priority
= skb_priority
;
275 match_set_pkt_mark(struct match
*match
, uint32_t pkt_mark
)
277 match_set_pkt_mark_masked(match
, pkt_mark
, UINT32_MAX
);
281 match_set_pkt_mark_masked(struct match
*match
, uint32_t pkt_mark
, uint32_t mask
)
283 match
->flow
.pkt_mark
= pkt_mark
& mask
;
284 match
->wc
.masks
.pkt_mark
= mask
;
288 match_set_dl_type(struct match
*match
, ovs_be16 dl_type
)
290 match
->wc
.masks
.dl_type
= OVS_BE16_MAX
;
291 match
->flow
.dl_type
= dl_type
;
294 /* Modifies 'value_src' so that the Ethernet address must match 'value_dst'
295 * exactly. 'mask_dst' is set to all 1s. */
297 set_eth(const struct eth_addr value_src
,
298 struct eth_addr
*value_dst
,
299 struct eth_addr
*mask_dst
)
301 *value_dst
= value_src
;
302 *mask_dst
= eth_addr_exact
;
305 /* Modifies 'value_src' so that the Ethernet address must match 'value_src'
306 * after each byte is ANDed with the appropriate byte in 'mask_src'.
307 * 'mask_dst' is set to 'mask_src' */
309 set_eth_masked(const struct eth_addr value_src
,
310 const struct eth_addr mask_src
,
311 struct eth_addr
*value_dst
, struct eth_addr
*mask_dst
)
315 for (i
= 0; i
< ARRAY_SIZE(value_dst
->be16
); i
++) {
316 value_dst
->be16
[i
] = value_src
.be16
[i
] & mask_src
.be16
[i
];
318 *mask_dst
= mask_src
;
321 /* Modifies 'rule' so that the source Ethernet address must match 'dl_src'
324 match_set_dl_src(struct match
*match
, const struct eth_addr dl_src
)
326 set_eth(dl_src
, &match
->flow
.dl_src
, &match
->wc
.masks
.dl_src
);
329 /* Modifies 'rule' so that the source Ethernet address must match 'dl_src'
330 * after each byte is ANDed with the appropriate byte in 'mask'. */
332 match_set_dl_src_masked(struct match
*match
,
333 const struct eth_addr dl_src
,
334 const struct eth_addr mask
)
336 set_eth_masked(dl_src
, mask
, &match
->flow
.dl_src
, &match
->wc
.masks
.dl_src
);
339 /* Modifies 'match' so that the Ethernet address must match 'dl_dst'
342 match_set_dl_dst(struct match
*match
, const struct eth_addr dl_dst
)
344 set_eth(dl_dst
, &match
->flow
.dl_dst
, &match
->wc
.masks
.dl_dst
);
347 /* Modifies 'match' so that the Ethernet address must match 'dl_dst' after each
348 * byte is ANDed with the appropriate byte in 'mask'.
350 * This function will assert-fail if 'mask' is invalid. Only 'mask' values
351 * accepted by flow_wildcards_is_dl_dst_mask_valid() are allowed. */
353 match_set_dl_dst_masked(struct match
*match
,
354 const struct eth_addr dl_dst
,
355 const struct eth_addr mask
)
357 set_eth_masked(dl_dst
, mask
, &match
->flow
.dl_dst
, &match
->wc
.masks
.dl_dst
);
361 match_set_dl_tci(struct match
*match
, ovs_be16 tci
)
363 match_set_dl_tci_masked(match
, tci
, htons(0xffff));
367 match_set_dl_tci_masked(struct match
*match
, ovs_be16 tci
, ovs_be16 mask
)
369 match
->flow
.vlan_tci
= tci
& mask
;
370 match
->wc
.masks
.vlan_tci
= mask
;
373 /* Modifies 'match' so that the VLAN VID is wildcarded. If the PCP is already
374 * wildcarded, then 'match' will match a packet regardless of whether it has an
375 * 802.1Q header or not. */
377 match_set_any_vid(struct match
*match
)
379 if (match
->wc
.masks
.vlan_tci
& htons(VLAN_PCP_MASK
)) {
380 match
->wc
.masks
.vlan_tci
&= ~htons(VLAN_VID_MASK
);
381 match
->flow
.vlan_tci
&= ~htons(VLAN_VID_MASK
);
383 match_set_dl_tci_masked(match
, htons(0), htons(0));
387 /* Modifies 'match' depending on 'dl_vlan':
389 * - If 'dl_vlan' is htons(OFP_VLAN_NONE), makes 'match' match only packets
390 * without an 802.1Q header.
392 * - Otherwise, makes 'match' match only packets with an 802.1Q header whose
393 * VID equals the low 12 bits of 'dl_vlan'.
396 match_set_dl_vlan(struct match
*match
, ovs_be16 dl_vlan
)
398 flow_set_dl_vlan(&match
->flow
, dl_vlan
);
399 if (dl_vlan
== htons(OFP10_VLAN_NONE
)) {
400 match
->wc
.masks
.vlan_tci
= OVS_BE16_MAX
;
402 match
->wc
.masks
.vlan_tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
406 /* Sets the VLAN VID that 'match' matches to 'vid', which is interpreted as an
407 * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID
410 match_set_vlan_vid(struct match
*match
, ovs_be16 vid
)
412 match_set_vlan_vid_masked(match
, vid
, htons(VLAN_VID_MASK
| VLAN_CFI
));
416 /* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an
417 * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID
418 * plus CFI), with the corresponding 'mask'. */
420 match_set_vlan_vid_masked(struct match
*match
, ovs_be16 vid
, ovs_be16 mask
)
422 ovs_be16 pcp_mask
= htons(VLAN_PCP_MASK
);
423 ovs_be16 vid_mask
= htons(VLAN_VID_MASK
| VLAN_CFI
);
426 flow_set_vlan_vid(&match
->flow
, vid
& mask
);
427 match
->wc
.masks
.vlan_tci
= mask
| (match
->wc
.masks
.vlan_tci
& pcp_mask
);
430 /* Modifies 'match' so that the VLAN PCP is wildcarded. If the VID is already
431 * wildcarded, then 'match' will match a packet regardless of whether it has an
432 * 802.1Q header or not. */
434 match_set_any_pcp(struct match
*match
)
436 if (match
->wc
.masks
.vlan_tci
& htons(VLAN_VID_MASK
)) {
437 match
->wc
.masks
.vlan_tci
&= ~htons(VLAN_PCP_MASK
);
438 match
->flow
.vlan_tci
&= ~htons(VLAN_PCP_MASK
);
440 match_set_dl_tci_masked(match
, htons(0), htons(0));
444 /* Modifies 'match' so that it matches only packets with an 802.1Q header whose
445 * PCP equals the low 3 bits of 'dl_vlan_pcp'. */
447 match_set_dl_vlan_pcp(struct match
*match
, uint8_t dl_vlan_pcp
)
449 flow_set_vlan_pcp(&match
->flow
, dl_vlan_pcp
);
450 match
->wc
.masks
.vlan_tci
|= htons(VLAN_CFI
| VLAN_PCP_MASK
);
453 /* Modifies 'match' so that the MPLS label 'idx' matches 'lse' exactly. */
455 match_set_mpls_lse(struct match
*match
, int idx
, ovs_be32 lse
)
457 match
->wc
.masks
.mpls_lse
[idx
] = OVS_BE32_MAX
;
458 match
->flow
.mpls_lse
[idx
] = lse
;
461 /* Modifies 'match' so that the MPLS label is wildcarded. */
463 match_set_any_mpls_label(struct match
*match
, int idx
)
465 match
->wc
.masks
.mpls_lse
[idx
] &= ~htonl(MPLS_LABEL_MASK
);
466 flow_set_mpls_label(&match
->flow
, idx
, htonl(0));
469 /* Modifies 'match' so that it matches only packets with an MPLS header whose
470 * label equals the low 20 bits of 'mpls_label'. */
472 match_set_mpls_label(struct match
*match
, int idx
, ovs_be32 mpls_label
)
474 match
->wc
.masks
.mpls_lse
[idx
] |= htonl(MPLS_LABEL_MASK
);
475 flow_set_mpls_label(&match
->flow
, idx
, mpls_label
);
478 /* Modifies 'match' so that the MPLS TC is wildcarded. */
480 match_set_any_mpls_tc(struct match
*match
, int idx
)
482 match
->wc
.masks
.mpls_lse
[idx
] &= ~htonl(MPLS_TC_MASK
);
483 flow_set_mpls_tc(&match
->flow
, idx
, 0);
486 /* Modifies 'match' so that it matches only packets with an MPLS header whose
487 * Traffic Class equals the low 3 bits of 'mpls_tc'. */
489 match_set_mpls_tc(struct match
*match
, int idx
, uint8_t mpls_tc
)
491 match
->wc
.masks
.mpls_lse
[idx
] |= htonl(MPLS_TC_MASK
);
492 flow_set_mpls_tc(&match
->flow
, idx
, mpls_tc
);
495 /* Modifies 'match' so that the MPLS stack flag is wildcarded. */
497 match_set_any_mpls_bos(struct match
*match
, int idx
)
499 match
->wc
.masks
.mpls_lse
[idx
] &= ~htonl(MPLS_BOS_MASK
);
500 flow_set_mpls_bos(&match
->flow
, idx
, 0);
503 /* Modifies 'match' so that it matches only packets with an MPLS header whose
504 * Stack Flag equals the lower bit of 'mpls_bos' */
506 match_set_mpls_bos(struct match
*match
, int idx
, uint8_t mpls_bos
)
508 match
->wc
.masks
.mpls_lse
[idx
] |= htonl(MPLS_BOS_MASK
);
509 flow_set_mpls_bos(&match
->flow
, idx
, mpls_bos
);
512 /* Modifies 'match' so that the MPLS LSE is wildcarded. */
514 match_set_any_mpls_lse(struct match
*match
, int idx
)
516 match
->wc
.masks
.mpls_lse
[idx
] = htonl(0);
517 flow_set_mpls_lse(&match
->flow
, idx
, htonl(0));
521 match_set_tp_src(struct match
*match
, ovs_be16 tp_src
)
523 match_set_tp_src_masked(match
, tp_src
, OVS_BE16_MAX
);
527 match_set_tp_src_masked(struct match
*match
, ovs_be16 port
, ovs_be16 mask
)
529 match
->flow
.tp_src
= port
& mask
;
530 match
->wc
.masks
.tp_src
= mask
;
534 match_set_tp_dst(struct match
*match
, ovs_be16 tp_dst
)
536 match_set_tp_dst_masked(match
, tp_dst
, OVS_BE16_MAX
);
540 match_set_tp_dst_masked(struct match
*match
, ovs_be16 port
, ovs_be16 mask
)
542 match
->flow
.tp_dst
= port
& mask
;
543 match
->wc
.masks
.tp_dst
= mask
;
547 match_set_tcp_flags(struct match
*match
, ovs_be16 flags
)
549 match_set_tcp_flags_masked(match
, flags
, OVS_BE16_MAX
);
553 match_set_tcp_flags_masked(struct match
*match
, ovs_be16 flags
, ovs_be16 mask
)
555 match
->flow
.tcp_flags
= flags
& mask
;
556 match
->wc
.masks
.tcp_flags
= mask
;
560 match_set_nw_proto(struct match
*match
, uint8_t nw_proto
)
562 match
->flow
.nw_proto
= nw_proto
;
563 match
->wc
.masks
.nw_proto
= UINT8_MAX
;
567 match_set_nw_src(struct match
*match
, ovs_be32 nw_src
)
569 match
->flow
.nw_src
= nw_src
;
570 match
->wc
.masks
.nw_src
= OVS_BE32_MAX
;
574 match_set_nw_src_masked(struct match
*match
,
575 ovs_be32 nw_src
, ovs_be32 mask
)
577 match
->flow
.nw_src
= nw_src
& mask
;
578 match
->wc
.masks
.nw_src
= mask
;
582 match_set_nw_dst(struct match
*match
, ovs_be32 nw_dst
)
584 match
->flow
.nw_dst
= nw_dst
;
585 match
->wc
.masks
.nw_dst
= OVS_BE32_MAX
;
589 match_set_nw_dst_masked(struct match
*match
, ovs_be32 ip
, ovs_be32 mask
)
591 match
->flow
.nw_dst
= ip
& mask
;
592 match
->wc
.masks
.nw_dst
= mask
;
596 match_set_nw_dscp(struct match
*match
, uint8_t nw_dscp
)
598 match
->wc
.masks
.nw_tos
|= IP_DSCP_MASK
;
599 match
->flow
.nw_tos
&= ~IP_DSCP_MASK
;
600 match
->flow
.nw_tos
|= nw_dscp
& IP_DSCP_MASK
;
604 match_set_nw_ecn(struct match
*match
, uint8_t nw_ecn
)
606 match
->wc
.masks
.nw_tos
|= IP_ECN_MASK
;
607 match
->flow
.nw_tos
&= ~IP_ECN_MASK
;
608 match
->flow
.nw_tos
|= nw_ecn
& IP_ECN_MASK
;
612 match_set_nw_ttl(struct match
*match
, uint8_t nw_ttl
)
614 match
->wc
.masks
.nw_ttl
= UINT8_MAX
;
615 match
->flow
.nw_ttl
= nw_ttl
;
619 match_set_nw_frag(struct match
*match
, uint8_t nw_frag
)
621 match
->wc
.masks
.nw_frag
|= FLOW_NW_FRAG_MASK
;
622 match
->flow
.nw_frag
= nw_frag
;
626 match_set_nw_frag_masked(struct match
*match
,
627 uint8_t nw_frag
, uint8_t mask
)
629 match
->flow
.nw_frag
= nw_frag
& mask
;
630 match
->wc
.masks
.nw_frag
= mask
;
634 match_set_icmp_type(struct match
*match
, uint8_t icmp_type
)
636 match_set_tp_src(match
, htons(icmp_type
));
640 match_set_icmp_code(struct match
*match
, uint8_t icmp_code
)
642 match_set_tp_dst(match
, htons(icmp_code
));
646 match_set_arp_sha(struct match
*match
, const struct eth_addr sha
)
648 match
->flow
.arp_sha
= sha
;
649 match
->wc
.masks
.arp_sha
= eth_addr_exact
;
653 match_set_arp_sha_masked(struct match
*match
,
654 const struct eth_addr arp_sha
,
655 const struct eth_addr mask
)
657 set_eth_masked(arp_sha
, mask
,
658 &match
->flow
.arp_sha
, &match
->wc
.masks
.arp_sha
);
662 match_set_arp_tha(struct match
*match
, const struct eth_addr tha
)
664 match
->flow
.arp_tha
= tha
;
665 match
->wc
.masks
.arp_tha
= eth_addr_exact
;
669 match_set_arp_tha_masked(struct match
*match
,
670 const struct eth_addr arp_tha
,
671 const struct eth_addr mask
)
673 set_eth_masked(arp_tha
, mask
,
674 &match
->flow
.arp_tha
, &match
->wc
.masks
.arp_tha
);
678 match_set_ipv6_src(struct match
*match
, const struct in6_addr
*src
)
680 match
->flow
.ipv6_src
= *src
;
681 match
->wc
.masks
.ipv6_src
= in6addr_exact
;
685 match_set_ipv6_src_masked(struct match
*match
, const struct in6_addr
*src
,
686 const struct in6_addr
*mask
)
688 match
->flow
.ipv6_src
= ipv6_addr_bitand(src
, mask
);
689 match
->wc
.masks
.ipv6_src
= *mask
;
693 match_set_ipv6_dst(struct match
*match
, const struct in6_addr
*dst
)
695 match
->flow
.ipv6_dst
= *dst
;
696 match
->wc
.masks
.ipv6_dst
= in6addr_exact
;
700 match_set_ipv6_dst_masked(struct match
*match
, const struct in6_addr
*dst
,
701 const struct in6_addr
*mask
)
703 match
->flow
.ipv6_dst
= ipv6_addr_bitand(dst
, mask
);
704 match
->wc
.masks
.ipv6_dst
= *mask
;
708 match_set_ipv6_label(struct match
*match
, ovs_be32 ipv6_label
)
710 match
->wc
.masks
.ipv6_label
= OVS_BE32_MAX
;
711 match
->flow
.ipv6_label
= ipv6_label
;
716 match_set_ipv6_label_masked(struct match
*match
, ovs_be32 ipv6_label
,
719 match
->flow
.ipv6_label
= ipv6_label
& mask
;
720 match
->wc
.masks
.ipv6_label
= mask
;
724 match_set_nd_target(struct match
*match
, const struct in6_addr
*target
)
726 match
->flow
.nd_target
= *target
;
727 match
->wc
.masks
.nd_target
= in6addr_exact
;
731 match_set_nd_target_masked(struct match
*match
,
732 const struct in6_addr
*target
,
733 const struct in6_addr
*mask
)
735 match
->flow
.nd_target
= ipv6_addr_bitand(target
, mask
);
736 match
->wc
.masks
.nd_target
= *mask
;
739 /* Returns true if 'a' and 'b' wildcard the same fields and have the same
740 * values for fixed fields, otherwise false. */
742 match_equal(const struct match
*a
, const struct match
*b
)
744 return (flow_wildcards_equal(&a
->wc
, &b
->wc
)
745 && flow_equal(&a
->flow
, &b
->flow
));
748 /* Returns a hash value for the flow and wildcards in 'match', starting from
751 match_hash(const struct match
*match
, uint32_t basis
)
753 return flow_wildcards_hash(&match
->wc
, flow_hash(&match
->flow
, basis
));
757 match_has_default_recirc_id(const struct match
*m
)
759 return m
->flow
.recirc_id
== 0 && (m
->wc
.masks
.recirc_id
== UINT32_MAX
||
760 m
->wc
.masks
.recirc_id
== 0);
764 match_has_default_dp_hash(const struct match
*m
)
766 return ((m
->flow
.dp_hash
| m
->wc
.masks
.dp_hash
) == 0);
769 /* Return true if the hidden fields of the match are set to the default values.
770 * The default values equals to those set up by match_init_hidden_fields(). */
772 match_has_default_hidden_fields(const struct match
*m
)
774 return match_has_default_recirc_id(m
) && match_has_default_dp_hash(m
);
778 match_init_hidden_fields(struct match
*m
)
780 match_set_recirc_id(m
, 0);
781 match_set_dp_hash_masked(m
, 0, 0);
785 format_eth_masked(struct ds
*s
, const char *name
,
786 const struct eth_addr eth
, const struct eth_addr mask
)
788 if (!eth_addr_is_zero(mask
)) {
789 ds_put_format(s
, "%s=", name
);
790 eth_format_masked(eth
, &mask
, s
);
796 format_ip_netmask(struct ds
*s
, const char *name
, ovs_be32 ip
,
800 ds_put_format(s
, "%s=", name
);
801 ip_format_masked(ip
, netmask
, s
);
807 format_ipv6_netmask(struct ds
*s
, const char *name
,
808 const struct in6_addr
*addr
,
809 const struct in6_addr
*netmask
)
811 if (!ipv6_mask_is_any(netmask
)) {
812 ds_put_format(s
, "%s=", name
);
813 print_ipv6_masked(s
, addr
, netmask
);
819 format_be16_masked(struct ds
*s
, const char *name
,
820 ovs_be16 value
, ovs_be16 mask
)
822 if (mask
!= htons(0)) {
823 ds_put_format(s
, "%s=", name
);
824 if (mask
== OVS_BE16_MAX
) {
825 ds_put_format(s
, "%"PRIu16
, ntohs(value
));
827 ds_put_format(s
, "0x%"PRIx16
"/0x%"PRIx16
,
828 ntohs(value
), ntohs(mask
));
835 format_be32_masked(struct ds
*s
, const char *name
,
836 ovs_be32 value
, ovs_be32 mask
)
838 if (mask
!= htonl(0)) {
839 ds_put_format(s
, "%s=", name
);
840 if (mask
== OVS_BE32_MAX
) {
841 ds_put_format(s
, "%"PRIu32
, ntohl(value
));
843 ds_put_format(s
, "0x%"PRIx32
"/0x%"PRIx32
,
844 ntohl(value
), ntohl(mask
));
851 format_uint32_masked(struct ds
*s
, const char *name
,
852 uint32_t value
, uint32_t mask
)
855 ds_put_format(s
, "%s=%#"PRIx32
, name
, value
);
856 if (mask
!= UINT32_MAX
) {
857 ds_put_format(s
, "/%#"PRIx32
, mask
);
864 format_be64_masked(struct ds
*s
, const char *name
,
865 ovs_be64 value
, ovs_be64 mask
)
867 if (mask
!= htonll(0)) {
868 ds_put_format(s
, "%s=%#"PRIx64
, name
, ntohll(value
));
869 if (mask
!= OVS_BE64_MAX
) {
870 ds_put_format(s
, "/%#"PRIx64
, ntohll(mask
));
877 format_flow_tunnel(struct ds
*s
, const struct match
*match
)
879 const struct flow_wildcards
*wc
= &match
->wc
;
880 const struct flow_tnl
*tnl
= &match
->flow
.tunnel
;
882 format_be64_masked(s
, "tun_id", tnl
->tun_id
, wc
->masks
.tunnel
.tun_id
);
883 format_ip_netmask(s
, "tun_src", tnl
->ip_src
, wc
->masks
.tunnel
.ip_src
);
884 format_ip_netmask(s
, "tun_dst", tnl
->ip_dst
, wc
->masks
.tunnel
.ip_dst
);
886 if (wc
->masks
.tunnel
.gbp_id
) {
887 format_be16_masked(s
, "tun_gbp_id", tnl
->gbp_id
,
888 wc
->masks
.tunnel
.gbp_id
);
891 if (wc
->masks
.tunnel
.gbp_flags
) {
892 ds_put_format(s
, "tun_gbp_flags=%#"PRIx8
",", tnl
->gbp_flags
);
895 if (wc
->masks
.tunnel
.ip_tos
) {
896 ds_put_format(s
, "tun_tos=%"PRIx8
",", tnl
->ip_tos
);
898 if (wc
->masks
.tunnel
.ip_ttl
) {
899 ds_put_format(s
, "tun_ttl=%"PRIu8
",", tnl
->ip_ttl
);
901 if (wc
->masks
.tunnel
.flags
) {
902 format_flags_masked(s
, "tun_flags", flow_tun_flag_to_string
,
904 wc
->masks
.tunnel
.flags
& FLOW_TNL_F_MASK
,
908 tun_metadata_match_format(s
, match
);
911 /* Appends a string representation of 'match' to 's'. If 'priority' is
912 * different from OFP_DEFAULT_PRIORITY, includes it in 's'. */
914 match_format(const struct match
*match
, struct ds
*s
, int priority
)
916 const struct flow_wildcards
*wc
= &match
->wc
;
917 size_t start_len
= s
->length
;
918 const struct flow
*f
= &match
->flow
;
919 bool skip_type
= false;
920 bool skip_proto
= false;
924 BUILD_ASSERT_DECL(FLOW_WC_SEQ
== 33);
926 if (priority
!= OFP_DEFAULT_PRIORITY
) {
927 ds_put_format(s
, "priority=%d,", priority
);
930 format_uint32_masked(s
, "pkt_mark", f
->pkt_mark
, wc
->masks
.pkt_mark
);
932 if (wc
->masks
.recirc_id
) {
933 format_uint32_masked(s
, "recirc_id", f
->recirc_id
,
934 wc
->masks
.recirc_id
);
937 if (wc
->masks
.dp_hash
) {
938 format_uint32_masked(s
, "dp_hash", f
->dp_hash
,
942 if (wc
->masks
.conj_id
) {
943 ds_put_format(s
, "conj_id=%"PRIu32
",", f
->conj_id
);
946 if (wc
->masks
.skb_priority
) {
947 ds_put_format(s
, "skb_priority=%#"PRIx32
",", f
->skb_priority
);
950 if (wc
->masks
.actset_output
) {
951 ds_put_cstr(s
, "actset_output=");
952 ofputil_format_port(f
->actset_output
, s
);
956 if (wc
->masks
.dl_type
) {
958 if (f
->dl_type
== htons(ETH_TYPE_IP
)) {
959 if (wc
->masks
.nw_proto
) {
961 if (f
->nw_proto
== IPPROTO_ICMP
) {
962 ds_put_cstr(s
, "icmp,");
963 } else if (f
->nw_proto
== IPPROTO_IGMP
) {
964 ds_put_cstr(s
, "igmp,");
965 } else if (f
->nw_proto
== IPPROTO_TCP
) {
966 ds_put_cstr(s
, "tcp,");
967 } else if (f
->nw_proto
== IPPROTO_UDP
) {
968 ds_put_cstr(s
, "udp,");
969 } else if (f
->nw_proto
== IPPROTO_SCTP
) {
970 ds_put_cstr(s
, "sctp,");
972 ds_put_cstr(s
, "ip,");
976 ds_put_cstr(s
, "ip,");
978 } else if (f
->dl_type
== htons(ETH_TYPE_IPV6
)) {
979 if (wc
->masks
.nw_proto
) {
981 if (f
->nw_proto
== IPPROTO_ICMPV6
) {
982 ds_put_cstr(s
, "icmp6,");
983 } else if (f
->nw_proto
== IPPROTO_TCP
) {
984 ds_put_cstr(s
, "tcp6,");
985 } else if (f
->nw_proto
== IPPROTO_UDP
) {
986 ds_put_cstr(s
, "udp6,");
987 } else if (f
->nw_proto
== IPPROTO_SCTP
) {
988 ds_put_cstr(s
, "sctp6,");
990 ds_put_cstr(s
, "ipv6,");
994 ds_put_cstr(s
, "ipv6,");
996 } else if (f
->dl_type
== htons(ETH_TYPE_ARP
)) {
997 ds_put_cstr(s
, "arp,");
998 } else if (f
->dl_type
== htons(ETH_TYPE_RARP
)) {
999 ds_put_cstr(s
, "rarp,");
1000 } else if (f
->dl_type
== htons(ETH_TYPE_MPLS
)) {
1001 ds_put_cstr(s
, "mpls,");
1002 } else if (f
->dl_type
== htons(ETH_TYPE_MPLS_MCAST
)) {
1003 ds_put_cstr(s
, "mplsm,");
1008 for (i
= 0; i
< FLOW_N_REGS
; i
++) {
1009 #define REGNAME_LEN 20
1010 char regname
[REGNAME_LEN
];
1011 if (snprintf(regname
, REGNAME_LEN
, "reg%d", i
) >= REGNAME_LEN
) {
1012 strcpy(regname
, "reg?");
1014 format_uint32_masked(s
, regname
, f
->regs
[i
], wc
->masks
.regs
[i
]);
1017 format_flow_tunnel(s
, match
);
1019 format_be64_masked(s
, "metadata", f
->metadata
, wc
->masks
.metadata
);
1021 if (wc
->masks
.in_port
.ofp_port
) {
1022 ds_put_cstr(s
, "in_port=");
1023 ofputil_format_port(f
->in_port
.ofp_port
, s
);
1024 ds_put_char(s
, ',');
1026 if (wc
->masks
.vlan_tci
) {
1027 ovs_be16 vid_mask
= wc
->masks
.vlan_tci
& htons(VLAN_VID_MASK
);
1028 ovs_be16 pcp_mask
= wc
->masks
.vlan_tci
& htons(VLAN_PCP_MASK
);
1029 ovs_be16 cfi
= wc
->masks
.vlan_tci
& htons(VLAN_CFI
);
1031 if (cfi
&& f
->vlan_tci
& htons(VLAN_CFI
)
1032 && (!vid_mask
|| vid_mask
== htons(VLAN_VID_MASK
))
1033 && (!pcp_mask
|| pcp_mask
== htons(VLAN_PCP_MASK
))
1034 && (vid_mask
|| pcp_mask
)) {
1036 ds_put_format(s
, "dl_vlan=%"PRIu16
",",
1037 vlan_tci_to_vid(f
->vlan_tci
));
1040 ds_put_format(s
, "dl_vlan_pcp=%d,",
1041 vlan_tci_to_pcp(f
->vlan_tci
));
1043 } else if (wc
->masks
.vlan_tci
== htons(0xffff)) {
1044 ds_put_format(s
, "vlan_tci=0x%04"PRIx16
",", ntohs(f
->vlan_tci
));
1046 ds_put_format(s
, "vlan_tci=0x%04"PRIx16
"/0x%04"PRIx16
",",
1047 ntohs(f
->vlan_tci
), ntohs(wc
->masks
.vlan_tci
));
1050 format_eth_masked(s
, "dl_src", f
->dl_src
, wc
->masks
.dl_src
);
1051 format_eth_masked(s
, "dl_dst", f
->dl_dst
, wc
->masks
.dl_dst
);
1052 if (!skip_type
&& wc
->masks
.dl_type
) {
1053 ds_put_format(s
, "dl_type=0x%04"PRIx16
",", ntohs(f
->dl_type
));
1055 if (f
->dl_type
== htons(ETH_TYPE_IPV6
)) {
1056 format_ipv6_netmask(s
, "ipv6_src", &f
->ipv6_src
, &wc
->masks
.ipv6_src
);
1057 format_ipv6_netmask(s
, "ipv6_dst", &f
->ipv6_dst
, &wc
->masks
.ipv6_dst
);
1058 if (wc
->masks
.ipv6_label
) {
1059 if (wc
->masks
.ipv6_label
== OVS_BE32_MAX
) {
1060 ds_put_format(s
, "ipv6_label=0x%05"PRIx32
",",
1061 ntohl(f
->ipv6_label
));
1063 ds_put_format(s
, "ipv6_label=0x%05"PRIx32
"/0x%05"PRIx32
",",
1064 ntohl(f
->ipv6_label
),
1065 ntohl(wc
->masks
.ipv6_label
));
1068 } else if (f
->dl_type
== htons(ETH_TYPE_ARP
) ||
1069 f
->dl_type
== htons(ETH_TYPE_RARP
)) {
1070 format_ip_netmask(s
, "arp_spa", f
->nw_src
, wc
->masks
.nw_src
);
1071 format_ip_netmask(s
, "arp_tpa", f
->nw_dst
, wc
->masks
.nw_dst
);
1073 format_ip_netmask(s
, "nw_src", f
->nw_src
, wc
->masks
.nw_src
);
1074 format_ip_netmask(s
, "nw_dst", f
->nw_dst
, wc
->masks
.nw_dst
);
1076 if (!skip_proto
&& wc
->masks
.nw_proto
) {
1077 if (f
->dl_type
== htons(ETH_TYPE_ARP
) ||
1078 f
->dl_type
== htons(ETH_TYPE_RARP
)) {
1079 ds_put_format(s
, "arp_op=%"PRIu8
",", f
->nw_proto
);
1081 ds_put_format(s
, "nw_proto=%"PRIu8
",", f
->nw_proto
);
1084 if (f
->dl_type
== htons(ETH_TYPE_ARP
) ||
1085 f
->dl_type
== htons(ETH_TYPE_RARP
)) {
1086 format_eth_masked(s
, "arp_sha", f
->arp_sha
, wc
->masks
.arp_sha
);
1087 format_eth_masked(s
, "arp_tha", f
->arp_tha
, wc
->masks
.arp_tha
);
1089 if (wc
->masks
.nw_tos
& IP_DSCP_MASK
) {
1090 ds_put_format(s
, "nw_tos=%"PRIu8
",", f
->nw_tos
& IP_DSCP_MASK
);
1092 if (wc
->masks
.nw_tos
& IP_ECN_MASK
) {
1093 ds_put_format(s
, "nw_ecn=%"PRIu8
",", f
->nw_tos
& IP_ECN_MASK
);
1095 if (wc
->masks
.nw_ttl
) {
1096 ds_put_format(s
, "nw_ttl=%"PRIu8
",", f
->nw_ttl
);
1098 if (wc
->masks
.mpls_lse
[0] & htonl(MPLS_LABEL_MASK
)) {
1099 ds_put_format(s
, "mpls_label=%"PRIu32
",",
1100 mpls_lse_to_label(f
->mpls_lse
[0]));
1102 if (wc
->masks
.mpls_lse
[0] & htonl(MPLS_TC_MASK
)) {
1103 ds_put_format(s
, "mpls_tc=%"PRIu8
",",
1104 mpls_lse_to_tc(f
->mpls_lse
[0]));
1106 if (wc
->masks
.mpls_lse
[0] & htonl(MPLS_TTL_MASK
)) {
1107 ds_put_format(s
, "mpls_ttl=%"PRIu8
",",
1108 mpls_lse_to_ttl(f
->mpls_lse
[0]));
1110 if (wc
->masks
.mpls_lse
[0] & htonl(MPLS_BOS_MASK
)) {
1111 ds_put_format(s
, "mpls_bos=%"PRIu8
",",
1112 mpls_lse_to_bos(f
->mpls_lse
[0]));
1114 format_be32_masked(s
, "mpls_lse1", f
->mpls_lse
[1], wc
->masks
.mpls_lse
[1]);
1115 format_be32_masked(s
, "mpls_lse2", f
->mpls_lse
[2], wc
->masks
.mpls_lse
[2]);
1117 switch (wc
->masks
.nw_frag
) {
1118 case FLOW_NW_FRAG_ANY
| FLOW_NW_FRAG_LATER
:
1119 ds_put_format(s
, "nw_frag=%s,",
1120 f
->nw_frag
& FLOW_NW_FRAG_ANY
1121 ? (f
->nw_frag
& FLOW_NW_FRAG_LATER
? "later" : "first")
1122 : (f
->nw_frag
& FLOW_NW_FRAG_LATER
? "<error>" : "no"));
1125 case FLOW_NW_FRAG_ANY
:
1126 ds_put_format(s
, "nw_frag=%s,",
1127 f
->nw_frag
& FLOW_NW_FRAG_ANY
? "yes" : "no");
1130 case FLOW_NW_FRAG_LATER
:
1131 ds_put_format(s
, "nw_frag=%s,",
1132 f
->nw_frag
& FLOW_NW_FRAG_LATER
? "later" : "not_later");
1135 if (f
->dl_type
== htons(ETH_TYPE_IP
) &&
1136 f
->nw_proto
== IPPROTO_ICMP
) {
1137 format_be16_masked(s
, "icmp_type", f
->tp_src
, wc
->masks
.tp_src
);
1138 format_be16_masked(s
, "icmp_code", f
->tp_dst
, wc
->masks
.tp_dst
);
1139 } else if (f
->dl_type
== htons(ETH_TYPE_IP
) &&
1140 f
->nw_proto
== IPPROTO_IGMP
) {
1141 format_be16_masked(s
, "igmp_type", f
->tp_src
, wc
->masks
.tp_src
);
1142 format_be16_masked(s
, "igmp_code", f
->tp_dst
, wc
->masks
.tp_dst
);
1143 } else if (f
->dl_type
== htons(ETH_TYPE_IPV6
) &&
1144 f
->nw_proto
== IPPROTO_ICMPV6
) {
1145 format_be16_masked(s
, "icmp_type", f
->tp_src
, wc
->masks
.tp_src
);
1146 format_be16_masked(s
, "icmp_code", f
->tp_dst
, wc
->masks
.tp_dst
);
1147 format_ipv6_netmask(s
, "nd_target", &f
->nd_target
,
1148 &wc
->masks
.nd_target
);
1149 format_eth_masked(s
, "nd_sll", f
->arp_sha
, wc
->masks
.arp_sha
);
1150 format_eth_masked(s
, "nd_tll", f
->arp_tha
, wc
->masks
.arp_tha
);
1152 format_be16_masked(s
, "tp_src", f
->tp_src
, wc
->masks
.tp_src
);
1153 format_be16_masked(s
, "tp_dst", f
->tp_dst
, wc
->masks
.tp_dst
);
1155 if (is_ip_any(f
) && f
->nw_proto
== IPPROTO_TCP
&& wc
->masks
.tcp_flags
) {
1156 format_flags_masked(s
, "tcp_flags", packet_tcp_flag_to_string
,
1157 ntohs(f
->tcp_flags
), TCP_FLAGS(wc
->masks
.tcp_flags
),
1158 TCP_FLAGS(OVS_BE16_MAX
));
1161 if (s
->length
> start_len
) {
1166 /* Converts 'match' to a string and returns the string. If 'priority' is
1167 * different from OFP_DEFAULT_PRIORITY, includes it in the string. The caller
1168 * must free the string (with free()). */
1170 match_to_string(const struct match
*match
, int priority
)
1172 struct ds s
= DS_EMPTY_INITIALIZER
;
1173 match_format(match
, &s
, priority
);
1174 return ds_steal_cstr(&s
);
1178 match_print(const struct match
*match
)
1180 char *s
= match_to_string(match
, OFP_DEFAULT_PRIORITY
);
1185 /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst'
1186 * with minimatch_destroy(). */
1188 minimatch_init(struct minimatch
*dst
, const struct match
*src
)
1190 struct miniflow tmp
;
1192 miniflow_map_init(&tmp
, &src
->wc
.masks
);
1193 /* Allocate two consecutive miniflows. */
1194 miniflow_alloc(dst
->flows
, 2, &tmp
);
1195 miniflow_init(dst
->flow
, &src
->flow
);
1196 minimask_init(dst
->mask
, &src
->wc
);
1199 /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst'
1200 * with minimatch_destroy(). */
1202 minimatch_clone(struct minimatch
*dst
, const struct minimatch
*src
)
1204 /* Allocate two consecutive miniflows. */
1205 size_t data_size
= miniflow_alloc(dst
->flows
, 2, &src
->mask
->masks
);
1207 memcpy(miniflow_values(dst
->flow
),
1208 miniflow_get_values(src
->flow
), data_size
);
1209 memcpy(miniflow_values(&dst
->mask
->masks
),
1210 miniflow_get_values(&src
->mask
->masks
), data_size
);
1213 /* Initializes 'dst' with the data in 'src', destroying 'src'. The caller must
1214 * eventually free 'dst' with minimatch_destroy(). */
1216 minimatch_move(struct minimatch
*dst
, struct minimatch
*src
)
1218 dst
->flow
= src
->flow
;
1219 dst
->mask
= src
->mask
;
1222 /* Frees any memory owned by 'match'. Does not free the storage in which
1223 * 'match' itself resides; the caller is responsible for that. */
1225 minimatch_destroy(struct minimatch
*match
)
1230 /* Initializes 'dst' as a copy of 'src'. */
1232 minimatch_expand(const struct minimatch
*src
, struct match
*dst
)
1234 miniflow_expand(src
->flow
, &dst
->flow
);
1235 minimask_expand(src
->mask
, &dst
->wc
);
1236 memset(&dst
->tun_md
, 0, sizeof dst
->tun_md
);
1239 /* Returns true if 'a' and 'b' match the same packets, false otherwise. */
1241 minimatch_equal(const struct minimatch
*a
, const struct minimatch
*b
)
1243 return minimask_equal(a
->mask
, b
->mask
)
1244 && miniflow_equal(a
->flow
, b
->flow
);
1247 /* Returns true if 'target' satisifies 'match', that is, if each bit for which
1248 * 'match' specifies a particular value has the correct value in 'target'.
1250 * This function is equivalent to miniflow_equal_flow_in_minimask(&match->flow,
1251 * target, &match->mask) but it is faster because of the invariant that
1252 * match->flow.map and match->mask.map are the same. */
1254 minimatch_matches_flow(const struct minimatch
*match
,
1255 const struct flow
*target
)
1257 const uint64_t *flowp
= miniflow_get_values(match
->flow
);
1258 const uint64_t *maskp
= miniflow_get_values(&match
->mask
->masks
);
1261 FLOWMAP_FOR_EACH_INDEX(idx
, match
->flow
->map
) {
1262 if ((*flowp
++ ^ flow_u64_value(target
, idx
)) & *maskp
++) {
1270 /* Appends a string representation of 'match' to 's'. If 'priority' is
1271 * different from OFP_DEFAULT_PRIORITY, includes it in 's'. */
1273 minimatch_format(const struct minimatch
*match
, struct ds
*s
, int priority
)
1275 struct match megamatch
;
1277 minimatch_expand(match
, &megamatch
);
1278 match_format(&megamatch
, s
, priority
);
1281 /* Converts 'match' to a string and returns the string. If 'priority' is
1282 * different from OFP_DEFAULT_PRIORITY, includes it in the string. The caller
1283 * must free the string (with free()). */
1285 minimatch_to_string(const struct minimatch
*match
, int priority
)
1287 struct match megamatch
;
1289 minimatch_expand(match
, &megamatch
);
1290 return match_to_string(&megamatch
, priority
);