diff options
Diffstat (limited to 'plugins/vcgn-plugin/vcgn/cnat_va_db.h')
| -rw-r--r-- | plugins/vcgn-plugin/vcgn/cnat_va_db.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/plugins/vcgn-plugin/vcgn/cnat_va_db.h b/plugins/vcgn-plugin/vcgn/cnat_va_db.h new file mode 100644 index 00000000..6e0051b4 --- /dev/null +++ b/plugins/vcgn-plugin/vcgn/cnat_va_db.h @@ -0,0 +1,121 @@ +/* + *------------------------------------------------------------------ + * 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__ */ + + |