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/*
* Copyright (c) 2009, 2010, 2011 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 ODP_UTIL_H
#define ODP_UTIL_H 1
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include "hash.h"
#include "openflow/openflow.h"
#include "openvswitch/datapath-protocol.h"
#include "util.h"
struct ds;
struct flow;
struct ofpbuf;
#define ODPP_NONE ((uint16_t) -1)
static inline uint16_t
ofp_port_to_odp_port(uint16_t ofp_port)
{
switch (ofp_port) {
case OFPP_LOCAL:
return ODPP_LOCAL;
case OFPP_NONE:
return ODPP_NONE;
default:
return ofp_port;
}
}
static inline uint16_t
odp_port_to_ofp_port(uint16_t odp_port)
{
switch (odp_port) {
case ODPP_LOCAL:
return OFPP_LOCAL;
case ODPP_NONE:
return OFPP_NONE;
default:
return odp_port;
}
}
int odp_action_len(uint16_t type);
void format_odp_action(struct ds *, const struct nlattr *);
void format_odp_actions(struct ds *, const struct nlattr *odp_actions,
size_t actions_len);
/* Upper bound on the length of a nlattr-formatted flow key. The longest
* nlattr-formatted flow key would be:
*
* struct pad nl hdr total
* ------ --- ------ -----
* ODP_KEY_ATTR_TUN_ID 8 -- 4 12
* ODP_KEY_ATTR_IN_PORT 4 -- 4 8
* ODP_KEY_ATTR_ETHERNET 12 -- 4 16
* ODP_KEY_ATTR_8021Q 4 -- 4 8
* ODP_KEY_ATTR_ETHERTYPE 2 2 4 8
* ODP_KEY_ATTR_IPV6 34 2 4 40
* ODP_KEY_ATTR_ICMPV6 2 2 4 8
* ODP_KEY_ATTR_ND 28 -- 4 32
* -------------------------------------------------
* total 132
*/
#define ODPUTIL_FLOW_KEY_BYTES 132
/* This is an imperfect sanity-check that ODPUTIL_FLOW_KEY_BYTES doesn't
* need to be updated, but will at least raise awareness when new ODP
* key types are added. */
BUILD_ASSERT_DECL(__ODP_KEY_ATTR_MAX == 14);
/* We allocate temporary on-stack buffers for flow keys as arrays of uint32_t
* to ensure proper 32-bit alignment for Netlink attributes. (An array of
* "struct nlattr" might not, in theory, be sufficiently aligned because it
* only contains 16-bit types.) */
#define ODPUTIL_FLOW_KEY_U32S DIV_ROUND_UP(ODPUTIL_FLOW_KEY_BYTES, 4)
void odp_flow_key_format(const struct nlattr *, size_t, struct ds *);
void odp_flow_key_from_flow(struct ofpbuf *, const struct flow *);
int odp_flow_key_to_flow(const struct nlattr *, size_t, struct flow *);
#endif /* odp-util.h */
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