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/*
*------------------------------------------------------------------
* cnat_va_db.h - definition for virtual assembly database
*
* Copyright (c) 2013 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 __CNAT_VA_DB_H__
#define __CNAT_VA_DB_H__
#include <clib_lite.h>
#define FRAG_DEBUG 1
/* virtual assemble hash database size ~ 16B x 64K = 1MB */
#define VA_TOTAL_ENTRIES (64*1024)
#define VA_ENTRY_PER_BUCKET (8) /* make sure size is power of 2 for circular FIFO */
#define VA_BUCKET_MASK (VA_ENTRY_PER_BUCKET -1)
#define VA_BUCKETS (VA_TOTAL_ENTRIES / VA_ENTRY_PER_BUCKET)
#define VA_KEY_SIZE 12
typedef struct _va_entry {
/* key: top 12 bytes */
u32 src_ip;
u32 dst_ip;
u16 vrf; /* overloaded with protocol info with top two bits */
u16 ip_id;
/* values */
u16 src_port;
u16 dst_port;
} va_entry_t;
typedef struct _va_keys {
u64 key64; /* src & dst IP */
u32 key32; /* vrf, protocol and ip_id */
} va_keys;
typedef union {
va_entry_t e;
va_keys k;
} va_lookup_key;
typedef struct _va_bucket_t {
u32 head_entry;
u32 next_available_entry; /* ~0 for empty bucket */
u32 new_entry_counter; /* for debug purpose */
va_entry_t va_entry[VA_ENTRY_PER_BUCKET];
} va_bucket_t;
extern va_bucket_t va_bucket[]; /* hash table in cnat_va_db.c */
void va_bucket_init ();
inline void va_db_add_new_entry (u32 bucket_index, va_lookup_key * );
inline int va_db_delete_entry (u32 bucket_index, va_lookup_key * );
inline va_entry_t * va_db_lookup (u32 bucket_index, va_lookup_key * key);
#ifdef FRAG_DEBUG
#define FRAG_DEBUG_PRINTF1(a) \
if (frag_debug_flag) { \
PLATFORM_DEBUG_PRINT(a); \
}
#define FRAG_DEBUG_PRINTF2(a, b) \
if (frag_debug_flag) { \
PLATFORM_DEBUG_PRINT(a, b); \
}
#define FRAG_DEBUG_PRINTF3(a, b, c) \
if (frag_debug_flag) { \
PLATFORM_DEBUG_PRINT(a, b, c); \
}
#define FRAG_DEBUG_PRINTF4(a, b, c, d) \
if (frag_debug_flag) { \
PLATFORM_DEBUG_PRINT(a, b, c, d); \
}
#define FRAG_DEBUG_PRINTF5(a, b, c, d, e) \
if (frag_debug_flag) { \
PLATFORM_DEBUG_PRINT(a, b, c, d, e); \
}
#define FRAG_DEBUG_PRINTF6(a, b, c, d, e, f) \
if (frag_debug_flag) { \
PLATFORM_DEBUG_PRINT(a, b, c, d, e, f); \
}
#else
#define FRAG_DEBUG_PRINTF1(a)
#define FRAG_DEBUG_PRINTF2(a, b)
#define FRAG_DEBUG_PRINTF3(a, b, c)
#define FRAG_DEBUG_PRINTF4(a, b, c, d)
#define FRAG_DEBUG_PRINTF5(a, b, c, d, e)
#define FRAG_DEBUG_PRINTF6(a, b, c, d, e, f)
#endif
#endif /* __CNAT_VA_DB_H__ */
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