diff options
author | Ben Pfaff <blp@nicira.com> | 2010-11-09 17:00:59 -0800 |
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committer | Ben Pfaff <blp@nicira.com> | 2010-11-09 17:08:09 -0800 |
commit | 09246b99d1601e2ba7ff85bb26f9b0235632a76d (patch) | |
tree | 394a323d3fdff5f74425e868feeed6da74729e4d /lib/nx-match.h | |
parent | 734bbeb479093f367f025a2298a4e70cb6015998 (diff) |
ofproto: Implement Nicira Extended Match flexible flow match (NXM).
Diffstat (limited to 'lib/nx-match.h')
-rw-r--r-- | lib/nx-match.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/lib/nx-match.h b/lib/nx-match.h new file mode 100644 index 00000000..7bfea8c8 --- /dev/null +++ b/lib/nx-match.h @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2010 Nicira Networks. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef NX_MATCH_H +#define NX_MATCH_H 1 + +#include <stdint.h> + +struct cls_rule; +struct ofpbuf; + +/* Nicira Extended Match (NXM) flexible flow match helper functions. + * + * See include/openflow/nicira-ext.h for NXM specification. + */ + +int nx_pull_match(struct ofpbuf *, unsigned int match_len, uint16_t priority, + struct cls_rule *); +int nx_put_match(struct ofpbuf *, const struct cls_rule *); + +char *nx_match_to_string(const uint8_t *, unsigned int match_len); +int nx_match_from_string(const char *, struct ofpbuf *); + +/* Upper bound on the length of an nx_match. The longest nx_match (assuming + * we implement 4 registers) would be: + * + * header value mask total + * ------ ----- ---- ----- + * NXM_OF_IN_PORT 4 2 -- 6 + * NXM_OF_ETH_DST_W 4 6 6 16 + * NXM_OF_ETH_SRC 4 6 -- 10 + * NXM_OF_ETH_TYPE 4 2 -- 6 + * NXM_OF_VLAN_TCI 4 2 2 8 + * NXM_OF_IP_TOS 4 1 -- 5 + * NXM_OF_IP_PROTO 4 2 -- 6 + * NXM_OF_IP_SRC_W 4 4 4 12 + * NXM_OF_IP_DST_W 4 4 4 12 + * NXM_OF_TCP_SRC 4 2 -- 6 + * NXM_OF_TCP_DST 4 2 -- 6 + * NXM_NX_REG_W(0) 4 4 4 12 + * NXM_NX_REG_W(1) 4 4 4 12 + * NXM_NX_REG_W(2) 4 4 4 12 + * NXM_NX_REG_W(3) 4 4 4 12 + * NXM_NX_TUN_ID_W 4 8 8 20 + * ------------------------------------------- + * total 161 + * + * So this value is conservative. + */ +#define NXM_MAX_LEN 192 + +#endif /* nx-match.h */ |