2 * Copyright (c) 2010 Nicira Networks.
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.
25 /* Nicira Extended Match (NXM) flexible flow match helper functions.
27 * See include/openflow/nicira-ext.h for NXM specification.
30 int nx_pull_match(struct ofpbuf *, unsigned int match_len, uint16_t priority,
32 int nx_put_match(struct ofpbuf *, const struct cls_rule *);
34 char *nx_match_to_string(const uint8_t *, unsigned int match_len);
35 int nx_match_from_string(const char *, struct ofpbuf *);
37 /* Upper bound on the length of an nx_match. The longest nx_match (assuming
38 * we implement 4 registers) would be:
40 * header value mask total
41 * ------ ----- ---- -----
42 * NXM_OF_IN_PORT 4 2 -- 6
43 * NXM_OF_ETH_DST_W 4 6 6 16
44 * NXM_OF_ETH_SRC 4 6 -- 10
45 * NXM_OF_ETH_TYPE 4 2 -- 6
46 * NXM_OF_VLAN_TCI 4 2 2 8
47 * NXM_OF_IP_TOS 4 1 -- 5
48 * NXM_OF_IP_PROTO 4 2 -- 6
49 * NXM_OF_IP_SRC_W 4 4 4 12
50 * NXM_OF_IP_DST_W 4 4 4 12
51 * NXM_OF_TCP_SRC 4 2 -- 6
52 * NXM_OF_TCP_DST 4 2 -- 6
53 * NXM_NX_REG_W(0) 4 4 4 12
54 * NXM_NX_REG_W(1) 4 4 4 12
55 * NXM_NX_REG_W(2) 4 4 4 12
56 * NXM_NX_REG_W(3) 4 4 4 12
57 * NXM_NX_TUN_ID_W 4 8 8 20
58 * -------------------------------------------
61 * So this value is conservative.
63 #define NXM_MAX_LEN 192
65 #endif /* nx-match.h */