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nx-match.h
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/*
* Copyright (c) 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
*
* 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>
#include <sys/types.h>
#include <netinet/in.h>
#include "compiler.h"
#include "flow.h"
#include "meta-flow.h"
#include "ofp-errors.h"
#include "openvswitch/types.h"
struct ds;
struct match;
struct ofpact_reg_move;
struct ofpact_reg_load;
struct ofpact_stack;
struct ofpbuf;
struct nx_action_reg_load;
struct nx_action_reg_move;
/* Nicira Extended Match (NXM) flexible flow match helper functions.
*
* See include/openflow/nicira-ext.h for NXM specification.
*/
void mf_format_subfield(const struct mf_subfield *, struct ds *);
char *mf_parse_subfield__(struct mf_subfield *sf, const char **s)
OVS_WARN_UNUSED_RESULT;
char *mf_parse_subfield(struct mf_subfield *, const char *s)
OVS_WARN_UNUSED_RESULT;
enum ofperr nx_pull_match(struct ofpbuf *, unsigned int match_len,
struct match *,
ovs_be64 *cookie, ovs_be64 *cookie_mask);
enum ofperr nx_pull_match_loose(struct ofpbuf *, unsigned int match_len,
struct match *, ovs_be64 *cookie,
ovs_be64 *cookie_mask);
enum ofperr oxm_pull_match(struct ofpbuf *, struct match *);
enum ofperr oxm_pull_match_loose(struct ofpbuf *, struct match *);
enum ofperr oxm_pull_field_array(const void *, size_t fields_len,
struct field_array *);
int nx_put_match(struct ofpbuf *, const struct match *,
ovs_be64 cookie, ovs_be64 cookie_mask);
int oxm_put_match(struct ofpbuf *, const struct match *, enum ofp_version);
void oxm_format_field_array(struct ds *, const struct field_array *);
int oxm_put_field_array(struct ofpbuf *, const struct field_array *,
enum ofp_version version);
/* Decoding and encoding OXM/NXM headers (just a field ID) or entries (a field
* ID followed by a value and possibly a mask). */
enum ofperr nx_pull_entry(struct ofpbuf *, const struct mf_field **,
union mf_value *value, union mf_value *mask);
enum ofperr nx_pull_header(struct ofpbuf *, const struct mf_field **,
bool *masked);
void nxm_put__(struct ofpbuf *b, enum mf_field_id field,
enum ofp_version version, const void *value,
const void *mask, size_t n_bytes);
void nx_put_entry(struct ofpbuf *, enum mf_field_id, enum ofp_version,
const union mf_value *value, const union mf_value *mask);
void nx_put_header(struct ofpbuf *, enum mf_field_id, enum ofp_version,
bool masked);
/* NXM and OXM protocol headers values.
*
* These are often alternatives to nx_pull_entry/header() and
* nx_put_entry/header() for decoding and encoding OXM/NXM. In those cases,
* the nx_*() functions should be preferred because they can support the 64-bit
* "experimenter" OXM format (even though it is not yet implemented). */
uint32_t mf_nxm_header(enum mf_field_id);
const struct mf_field *mf_from_nxm_header(uint32_t nxm_header);
char *nx_match_to_string(const uint8_t *, unsigned int match_len);
char *oxm_match_to_string(const struct ofpbuf *, unsigned int match_len);
int nx_match_from_string(const char *, struct ofpbuf *);
int oxm_match_from_string(const char *, struct ofpbuf *);
void nx_format_field_name(enum mf_field_id, enum ofp_version, struct ds *);
char *nxm_parse_reg_move(struct ofpact_reg_move *, const char *)
OVS_WARN_UNUSED_RESULT;
void nxm_format_reg_move(const struct ofpact_reg_move *, struct ds *);
enum ofperr nxm_reg_move_check(const struct ofpact_reg_move *,
const struct flow *);
void nxm_execute_reg_move(const struct ofpact_reg_move *, struct flow *,
struct flow_wildcards *);
void nxm_reg_load(const struct mf_subfield *, uint64_t src_data,
struct flow *, struct flow_wildcards *);
char *nxm_parse_stack_action(struct ofpact_stack *, const char *)
OVS_WARN_UNUSED_RESULT;
void nxm_format_stack_push(const struct ofpact_stack *, struct ds *);
void nxm_format_stack_pop(const struct ofpact_stack *, struct ds *);
enum ofperr nxm_stack_push_check(const struct ofpact_stack *,
const struct flow *);
enum ofperr nxm_stack_pop_check(const struct ofpact_stack *,
const struct flow *);
void nxm_execute_stack_push(const struct ofpact_stack *,
const struct flow *, struct flow_wildcards *,
struct ofpbuf *);
void nxm_execute_stack_pop(const struct ofpact_stack *,
struct flow *, struct flow_wildcards *,
struct ofpbuf *);
ovs_be64 oxm_bitmap_from_mf_bitmap(const struct mf_bitmap *, enum ofp_version);
struct mf_bitmap oxm_bitmap_to_mf_bitmap(ovs_be64 oxm_bitmap,
enum ofp_version);
struct mf_bitmap oxm_writable_fields(void);
struct mf_bitmap oxm_matchable_fields(void);
struct mf_bitmap oxm_maskable_fields(void);
/* Dealing with the 'ofs_nbits' members in several Nicira extensions. */
static inline ovs_be16
nxm_encode_ofs_nbits(int ofs, int n_bits)
{
return htons((ofs << 6) | (n_bits - 1));
}
static inline int
nxm_decode_ofs(ovs_be16 ofs_nbits)
{
return ntohs(ofs_nbits) >> 6;
}
static inline int
nxm_decode_n_bits(ovs_be16 ofs_nbits)
{
return (ntohs(ofs_nbits) & 0x3f) + 1;
}
/* This is my guess at the length of a "typical" nx_match, for use in
* predicting space requirements. */
#define NXM_TYPICAL_LEN 64
#endif /* nx-match.h */