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/*
* Copyright (c) 2015, 2016 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 OVN_ACTIONS_H
#define OVN_ACTIONS_H 1
#include <stdbool.h>
#include <stdint.h>
#include "compiler.h"
#include "util.h"
struct expr;
struct lexer;
struct ofpbuf;
struct shash;
struct simap;
enum action_opcode {
/* "arp { ...actions... }".
*
* The actions, in OpenFlow 1.3 format, follow the action_header.
*/
ACTION_OPCODE_ARP,
/* "put_arp(port, ip, mac)"
*
* Arguments are passed through the packet metadata and data, as follows:
*
* MFF_REG0 = ip
* MFF_LOG_INPORT = port
* MFF_ETH_SRC = mac
*/
ACTION_OPCODE_PUT_ARP,
/* "result = put_dhcp_opts(offer_ip, option, ...)".
*
* Arguments follow the action_header, in this format:
* - A 32-bit or 64-bit OXM header designating the result field.
* - A 32-bit integer specifying a bit offset within the result field.
* - The 32-bit DHCP offer IP.
* - Any number of DHCP options.
*/
ACTION_OPCODE_PUT_DHCP_OPTS,
/* "na { ...actions... }".
*
* The actions, in OpenFlow 1.3 format, follow the action_header.
*/
ACTION_OPCODE_NA,
};
/* Header. */
struct action_header {
ovs_be32 opcode; /* One of ACTION_OPCODE_* */
uint8_t pad[4];
};
BUILD_ASSERT_DECL(sizeof(struct action_header) == 8);
struct action_params {
/* A table of "struct expr_symbol"s to support (as one would provide to
* expr_parse()). */
const struct shash *symtab;
/* hmap of 'struct dhcp_opts_map' to support 'put_dhcp_opts' action */
const struct hmap *dhcp_opts;
/* Looks up logical port 'port_name'. If found, stores its port number in
* '*portp' and returns true; otherwise, returns false. */
bool (*lookup_port)(const void *aux, const char *port_name,
unsigned int *portp);
const void *aux;
/* A map from a port name to its connection tracking zone. */
const struct simap *ct_zones;
/* OVN maps each logical flow table (ltable), one-to-one, onto a physical
* OpenFlow flow table (ptable). A number of parameters describe this
* mapping and data related to flow tables:
*
* - 'first_ptable' and 'n_tables' define the range of OpenFlow tables
* to which the logical "next" action should be able to jump.
* Logical table 0 maps to OpenFlow table 'first_ptable', logical
* table 1 to 'first_ptable + 1', and so on. If 'n_tables' is 0
* then "next" is disallowed entirely.
*
* - 'cur_ltable' is an offset from 'first_ptable' (e.g. 0 <=
* cur_ltable < n_ptables) of the logical flow that contains the
* actions. If cur_ltable + 1 < n_tables, then this defines the
* default table that "next" will jump to.
*
* - 'output_ptable' should be the OpenFlow table to which the logical
* "output" action will resubmit. */
uint8_t n_tables; /* Number of flow tables. */
uint8_t first_ptable; /* First OpenFlow table. */
uint8_t cur_ltable; /* 0 <= cur_ltable < n_tables. */
uint8_t output_ptable; /* OpenFlow table for 'output' to resubmit. */
uint8_t arp_ptable; /* OpenFlow table for 'get_arp' to resubmit. */
};
char *actions_parse(struct lexer *, const struct action_params *,
struct ofpbuf *ofpacts, struct expr **prereqsp)
OVS_WARN_UNUSED_RESULT;
char *actions_parse_string(const char *s, const struct action_params *,
struct ofpbuf *ofpacts, struct expr **prereqsp)
OVS_WARN_UNUSED_RESULT;
#endif /* ovn/actions.h */
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