include/openvswitch/match.h

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc.
   3  *
   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:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16
  17 #ifndef OPENVSWITCH_MATCH_H
  18 #define OPENVSWITCH_MATCH_H 1
  19
  20 #include "openvswitch/flow.h"
  21 #include "openvswitch/packets.h"
  22 #include "openvswitch/tun-metadata.h"
  23
  24 struct ds;
  25
  26 /* A flow classification match.
  27  *
  28  * Use one of the match_*() functions to initialize a "struct match".
  29  *
  30  * The match_*() functions below maintain the following important invariant.
  31  * If a bit or a field is wildcarded in 'wc', then the corresponding bit or
  32  * field in 'flow' is set to all-0-bits.  (The match_zero_wildcarded_fields()
  33  * function can be used to restore this invariant after adding wildcards.) */
  34 struct match {
  35     struct flow flow;
  36     struct flow_wildcards wc;
  37     struct tun_metadata_allocation tun_md;
  38 };
  39
  40 /* Initializer for a "struct match" that matches every packet. */
  41 #define MATCH_CATCHALL_INITIALIZER { .flow = { .dl_type = 0 } }
  42
  43 void match_init(struct match *,
  44                 const struct flow *, const struct flow_wildcards *);
  45 void match_wc_init(struct match *match, const struct flow *flow);
  46 void match_init_catchall(struct match *);
  47
  48 void match_zero_wildcarded_fields(struct match *);
  49
  50 void match_set_dp_hash(struct match *, uint32_t value);
  51 void match_set_dp_hash_masked(struct match *, uint32_t value, uint32_t mask);
  52
  53 void match_set_recirc_id(struct match *, uint32_t value);
  54
  55 void match_set_conj_id(struct match *, uint32_t value);
  56
  57 void match_set_reg(struct match *, unsigned int reg_idx, uint32_t value);
  58 void match_set_reg_masked(struct match *, unsigned int reg_idx,
  59                           uint32_t value, uint32_t mask);
  60 void match_set_xreg(struct match *, unsigned int xreg_idx, uint64_t value);
  61 void match_set_xreg_masked(struct match *, unsigned int xreg_idx,
  62                            uint64_t value, uint64_t mask);
  63 void match_set_xxreg(struct match *, unsigned int xxreg_idx, ovs_u128 value);
  64 void match_set_xxreg_masked(struct match *, unsigned int xxreg_idx,
  65                            ovs_u128 value, ovs_u128 mask);
  66 void match_set_actset_output(struct match *, ofp_port_t actset_output);
  67 void match_set_metadata(struct match *, ovs_be64 metadata);
  68 void match_set_metadata_masked(struct match *,
  69                                ovs_be64 metadata, ovs_be64 mask);
  70 void match_set_tun_id(struct match *, ovs_be64 tun_id);
  71 void match_set_tun_id_masked(struct match *, ovs_be64 tun_id, ovs_be64 mask);
  72 void match_set_tun_src(struct match *match, ovs_be32 src);
  73 void match_set_tun_src_masked(struct match *match, ovs_be32 src, ovs_be32 mask);
  74 void match_set_tun_dst(struct match *match, ovs_be32 dst);
  75 void match_set_tun_dst_masked(struct match *match, ovs_be32 dst, ovs_be32 mask);
  76 void match_set_tun_ipv6_src(struct match *, const struct in6_addr *);
  77 void match_set_tun_ipv6_src_masked(struct match *, const struct in6_addr *,
  78                                    const struct in6_addr *);
  79 void match_set_tun_ipv6_dst(struct match *, const struct in6_addr *);
  80 void match_set_tun_ipv6_dst_masked(struct match *, const struct in6_addr *,
  81                                    const struct in6_addr *);
  82 void match_set_tun_ttl(struct match *match, uint8_t ttl);
  83 void match_set_tun_ttl_masked(struct match *match, uint8_t ttl, uint8_t mask);
  84 void match_set_tun_tos(struct match *match, uint8_t tos);
  85 void match_set_tun_tos_masked(struct match *match, uint8_t tos, uint8_t mask);
  86 void match_set_tun_flags(struct match *match, uint16_t flags);
  87 void match_set_tun_flags_masked(struct match *match, uint16_t flags, uint16_t mask);
  88 void match_set_tun_gbp_id_masked(struct match *match, ovs_be16 gbp_id, ovs_be16 mask);
  89 void match_set_tun_gbp_id(struct match *match, ovs_be16 gbp_id);
  90 void match_set_tun_gbp_flags_masked(struct match *match, uint8_t flags, uint8_t mask);
  91 void match_set_tun_gbp_flags(struct match *match, uint8_t flags);
  92 void match_set_in_port(struct match *, ofp_port_t ofp_port);
  93 void match_set_pkt_mark(struct match *, uint32_t pkt_mark);
  94 void match_set_pkt_mark_masked(struct match *, uint32_t pkt_mark, uint32_t mask);
  95 void match_set_ct_state(struct match *, uint32_t ct_state);
  96 void match_set_ct_state_masked(struct match *, uint32_t ct_state, uint32_t mask);
  97 void match_set_ct_zone(struct match *, uint16_t ct_zone);
  98 void match_set_ct_mark(struct match *, uint32_t ct_mark);
  99 void match_set_ct_mark_masked(struct match *, uint32_t ct_mark, uint32_t mask);
 100 void match_set_ct_label(struct match *, ovs_u128 ct_label);
 101 void match_set_ct_label_masked(struct match *, ovs_u128 ct_label, ovs_u128 mask);
 102 void match_set_ct_nw_src(struct match *, ovs_be32);
 103 void match_set_ct_nw_src_masked(struct match *, ovs_be32, ovs_be32 mask);
 104 void match_set_ct_nw_dst(struct match *, ovs_be32);
 105 void match_set_ct_nw_dst_masked(struct match *, ovs_be32, ovs_be32 mask);
 106 void match_set_ct_nw_proto(struct match *, uint8_t);
 107 void match_set_ct_tp_src(struct match *, ovs_be16);
 108 void match_set_ct_tp_src_masked(struct match *, ovs_be16, ovs_be16 mask);
 109 void match_set_ct_tp_dst(struct match *, ovs_be16);
 110 void match_set_ct_tp_dst_masked(struct match *, ovs_be16, ovs_be16 mask);
 111 void match_set_ct_ipv6_src(struct match *, const struct in6_addr *);
 112 void match_set_ct_ipv6_src_masked(struct match *, const struct in6_addr *,
 113                                   const struct in6_addr *);
 114 void match_set_ct_ipv6_dst(struct match *, const struct in6_addr *);
 115 void match_set_ct_ipv6_dst_masked(struct match *, const struct in6_addr *,
 116                                   const struct in6_addr *);
 117
 118 void match_set_skb_priority(struct match *, uint32_t skb_priority);
 119 void match_set_dl_type(struct match *, ovs_be16);
 120 void match_set_dl_src(struct match *, const struct eth_addr );
 121 void match_set_dl_src_masked(struct match *, const struct eth_addr dl_src,
 122                              const struct eth_addr mask);
 123 void match_set_dl_dst(struct match *, const struct eth_addr);
 124 void match_set_dl_dst_masked(struct match *, const struct eth_addr dl_dst,
 125                              const struct eth_addr mask);
 126 void match_set_dl_tci(struct match *, ovs_be16 tci);
 127 void match_set_dl_tci_masked(struct match *, ovs_be16 tci, ovs_be16 mask);
 128 void match_set_any_vid(struct match *);
 129 void match_set_dl_vlan(struct match *, ovs_be16);
 130 void match_set_vlan_vid(struct match *, ovs_be16);
 131 void match_set_vlan_vid_masked(struct match *, ovs_be16 vid, ovs_be16 mask);
 132 void match_set_any_pcp(struct match *);
 133 void match_set_dl_vlan_pcp(struct match *, uint8_t);
 134 void match_set_any_mpls_lse(struct match *, int idx);
 135 void match_set_mpls_lse(struct match *, int idx, ovs_be32);
 136 void match_set_any_mpls_label(struct match *, int idx);
 137 void match_set_mpls_label(struct match *, int idx, ovs_be32);
 138 void match_set_any_mpls_tc(struct match *, int idx);
 139 void match_set_mpls_tc(struct match *, int idx, uint8_t);
 140 void match_set_any_mpls_bos(struct match *, int idx);
 141 void match_set_mpls_bos(struct match *, int idx, uint8_t);
 142 void match_set_any_mpls_ttl(struct match *, int idx);
 143 void match_set_mpls_ttl(struct match *, int idx, uint8_t);
 144 void match_set_tp_src(struct match *, ovs_be16);
 145 void match_set_mpls_lse(struct match *, int idx, ovs_be32 lse);
 146 void match_set_tp_src_masked(struct match *, ovs_be16 port, ovs_be16 mask);
 147 void match_set_tp_dst(struct match *, ovs_be16);
 148 void match_set_tp_dst_masked(struct match *, ovs_be16 port, ovs_be16 mask);
 149 void match_set_tcp_flags(struct match *, ovs_be16);
 150 void match_set_tcp_flags_masked(struct match *, ovs_be16 flags, ovs_be16 mask);
 151 void match_set_nw_proto(struct match *, uint8_t);
 152 void match_set_nw_src(struct match *, ovs_be32);
 153 void match_set_nw_src_masked(struct match *, ovs_be32 ip, ovs_be32 mask);
 154 void match_set_nw_dst(struct match *, ovs_be32);
 155 void match_set_nw_dst_masked(struct match *, ovs_be32 ip, ovs_be32 mask);
 156 void match_set_nw_dscp(struct match *, uint8_t);
 157 void match_set_nw_ecn(struct match *, uint8_t);
 158 void match_set_nw_ttl(struct match *, uint8_t);
 159 void match_set_nw_frag(struct match *, uint8_t nw_frag);
 160 void match_set_nw_frag_masked(struct match *, uint8_t nw_frag, uint8_t mask);
 161 void match_set_icmp_type(struct match *, uint8_t);
 162 void match_set_icmp_code(struct match *, uint8_t);
 163 void match_set_arp_sha(struct match *, const struct eth_addr);
 164 void match_set_arp_sha_masked(struct match *,
 165                               const struct eth_addr arp_sha,
 166                               const struct eth_addr mask);
 167 void match_set_arp_tha(struct match *, const struct eth_addr);
 168 void match_set_arp_tha_masked(struct match *,
 169                               const struct eth_addr arp_tha,
 170                               const struct eth_addr mask);
 171 void match_set_ipv6_src(struct match *, const struct in6_addr *);
 172 void match_set_ipv6_src_masked(struct match *, const struct in6_addr *,
 173                                const struct in6_addr *);
 174 void match_set_ipv6_dst(struct match *, const struct in6_addr *);
 175 void match_set_ipv6_dst_masked(struct match *, const struct in6_addr *,
 176                                const struct in6_addr *);
 177 void match_set_ipv6_label(struct match *, ovs_be32);
 178 void match_set_ipv6_label_masked(struct match *, ovs_be32, ovs_be32);
 179 void match_set_nd_target(struct match *, const struct in6_addr *);
 180 void match_set_nd_target_masked(struct match *, const struct in6_addr *,
 181                                 const struct in6_addr *);
 182
 183 bool match_equal(const struct match *, const struct match *);
 184 uint32_t match_hash(const struct match *, uint32_t basis);
 185
 186 void match_init_hidden_fields(struct match *);
 187 bool match_has_default_hidden_fields(const struct match *);
 188
 189 void match_format(const struct match *, struct ds *, int priority);
 190 char *match_to_string(const struct match *, int priority);
 191 void match_print(const struct match *);
 192 \f
 193 /* Compressed match. */
 194
 195 /* A sparse representation of a "struct match".
 196  *
 197  * 'flows' is used for allocating both 'flow' and 'mask' with one
 198  * miniflow_alloc() call.
 199  *
 200  * There are two invariants:
 201  *
 202  *   - The same invariant as "struct match", that is, a 1-bit in the 'flow'
 203  *     must correspond to a 1-bit in 'mask'.
 204  *
 205  *   - 'flow' and 'mask' have the same 'map'.  This implies that 'flow' and
 206  *     'mask' have the same part of "struct flow" at the same offset into
 207  *     'values', which makes minimatch_matches_flow() faster.
 208  */
 209 struct minimatch {
 210     union {
 211         struct {
 212             struct miniflow *flow;
 213             struct minimask *mask;
 214         };
 215         struct miniflow *flows[2];
 216     };
 217 };
 218
 219 void minimatch_init(struct minimatch *, const struct match *);
 220 void minimatch_clone(struct minimatch *, const struct minimatch *);
 221 void minimatch_move(struct minimatch *dst, struct minimatch *src);
 222 void minimatch_destroy(struct minimatch *);
 223
 224 void minimatch_expand(const struct minimatch *, struct match *);
 225
 226 bool minimatch_equal(const struct minimatch *a, const struct minimatch *b);
 227
 228 bool minimatch_matches_flow(const struct minimatch *, const struct flow *);
 229
 230 void minimatch_format(const struct minimatch *, const struct tun_table *,
 231                       struct ds *, int priority);
 232 char *minimatch_to_string(const struct minimatch *, int priority);
 233
 234 #endif /* match.h */