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/*
*------------------------------------------------------------------
* nat64_tcp_sm.h - Stateful NAT64 translation TCP State machine
*
* Copyright (c) 2011 Cisco and/or its affiliates.
* 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 __NAT64_TCP_SM_H__
#define __NAT64_TCP_SM_H__
/* TCP States */
typedef enum {
TCP_CLOSED,
TCP_V4_INIT,
TCP_V6_INIT,
TCP_ESTABLISHED,
TCP_V4_FIN_RCV,
TCP_V6_FIN_RCV,
TCP_V4V6_FIN_RCV,
TCP_TRANS,
TCP_NONE
} nat64_tcp_states;
/* TCP Events */
typedef enum {
TCP_TIMEOUT_EV,
TCP_V6_SYN_EV,
TCP_V4_SYN_EV,
TCP_V6_FIN_EV,
TCP_V4_FIN_EV,
TCP_V6_RST_EV,
TCP_V4_RST_EV,
TCP_DEFAULT_EV,
TCP_EV_COUNT
} nat64_tcp_events;
/* TCP Actions */
typedef enum {
TCP_FORWARD,
TCP_COND_FORWARD, /* Conditional forward, based on presence of
* session and bib entries */
TCP_STORE,
TCP_PROBE,
TCP_CREATE_SESSION,
TCP_DELETE_SESSION,
TCP_DROP,
TCP_ACTION_NONE,
TCP_ACTION_COUNT
} nat64_tcp_actions;
typedef struct {
nat64_tcp_states next_state;
nat64_tcp_actions action;
} nat64_tcp_trans_t;
typedef struct {
nat64_tcp_trans_t event[TCP_EV_COUNT];
} nat64_tcp_state_trans_t;
extern nat64_tcp_state_trans_t nat64_tcp_sm_lookup[TCP_NONE];
/*
inline void
nat64_update_v6_to_v4_tcp (nat64_v6_to_v4_pipeline_data_t *pctx_ptr,
nat64_bib_entry_t *bib_ptr);
inline u8 nat64_v6_to_v4_tcp_perform_action (
spp_ctx_t *ctx,
nat64_v6_to_v4_pipeline_data_t *pctx_ptr,
nat64_bib_entry_t *bib_db,
nat64_session_entry_t *session_db);
inline void
nat64_copy_tcp_into_pctx (nat64_v6_to_v4_pipeline_data_t *pctx_ptr);
*/
#endif
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