FD.io VPP  v17.01.1-3-gc6833f8
Vector Packet Processing
cnat_va_db.h
Go to the documentation of this file.
1 /*
2  *------------------------------------------------------------------
3  * cnat_va_db.h - definition for virtual assembly database
4  *
5  * Copyright (c) 2013 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 
20 #ifndef __CNAT_VA_DB_H__
21 #define __CNAT_VA_DB_H__
22 
23 #include <clib_lite.h>
24 
25 #define FRAG_DEBUG 1
26 
27 /* virtual assemble hash database size ~ 16B x 64K = 1MB */
28 
29 #define VA_TOTAL_ENTRIES (64*1024)
30 #define VA_ENTRY_PER_BUCKET (8) /* make sure size is power of 2 for circular FIFO */
31 #define VA_BUCKET_MASK (VA_ENTRY_PER_BUCKET -1)
32 #define VA_BUCKETS (VA_TOTAL_ENTRIES / VA_ENTRY_PER_BUCKET)
33 #define VA_KEY_SIZE 12
34 
35 typedef struct _va_entry {
36  /* key: top 12 bytes */
37  u32 src_ip;
38  u32 dst_ip;
39  u16 vrf; /* overloaded with protocol info with top two bits */
40  u16 ip_id;
41 
42  /* values */
43  u16 src_port;
44  u16 dst_port;
45 } va_entry_t;
46 
47 typedef struct _va_keys {
48  u64 key64; /* src & dst IP */
49  u32 key32; /* vrf, protocol and ip_id */
50 } va_keys;
51 
52 typedef union {
56 
57 typedef struct _va_bucket_t {
58  u32 head_entry;
59  u32 next_available_entry; /* ~0 for empty bucket */
60  u32 new_entry_counter; /* for debug purpose */
62 } va_bucket_t;
63 
64 extern va_bucket_t va_bucket[]; /* hash table in cnat_va_db.c */
65 
66 void va_bucket_init ();
67 
68 inline void va_db_add_new_entry (u32 bucket_index, va_lookup_key * );
69 inline int va_db_delete_entry (u32 bucket_index, va_lookup_key * );
70 inline va_entry_t * va_db_lookup (u32 bucket_index, va_lookup_key * key);
71 
72 #ifdef FRAG_DEBUG
73 
74 #define FRAG_DEBUG_PRINTF1(a) \
75  if (frag_debug_flag) { \
76  PLATFORM_DEBUG_PRINT(a); \
77  }
78 
79 #define FRAG_DEBUG_PRINTF2(a, b) \
80  if (frag_debug_flag) { \
81  PLATFORM_DEBUG_PRINT(a, b); \
82  }
83 
84 #define FRAG_DEBUG_PRINTF3(a, b, c) \
85  if (frag_debug_flag) { \
86  PLATFORM_DEBUG_PRINT(a, b, c); \
87  }
88 
89 #define FRAG_DEBUG_PRINTF4(a, b, c, d) \
90  if (frag_debug_flag) { \
91  PLATFORM_DEBUG_PRINT(a, b, c, d); \
92  }
93 
94 #define FRAG_DEBUG_PRINTF5(a, b, c, d, e) \
95  if (frag_debug_flag) { \
96  PLATFORM_DEBUG_PRINT(a, b, c, d, e); \
97  }
98 
99 #define FRAG_DEBUG_PRINTF6(a, b, c, d, e, f) \
100  if (frag_debug_flag) { \
101  PLATFORM_DEBUG_PRINT(a, b, c, d, e, f); \
102  }
103 #else
104 
105 #define FRAG_DEBUG_PRINTF1(a)
106 
107 #define FRAG_DEBUG_PRINTF2(a, b)
108 
109 #define FRAG_DEBUG_PRINTF3(a, b, c)
110 
111 #define FRAG_DEBUG_PRINTF4(a, b, c, d)
112 
113 #define FRAG_DEBUG_PRINTF5(a, b, c, d, e)
114 
115 #define FRAG_DEBUG_PRINTF6(a, b, c, d, e, f)
116 
117 #endif
118 
119 #endif /* __CNAT_VA_DB_H__ */
120 
121 
va_entry_t * va_db_lookup(u32 bucket_index, va_lookup_key *key)
Definition: cnat_va_db.c:114
struct _va_keys va_keys
va_keys k
Definition: cnat_va_db.h:54
unsigned long u64
Definition: types.h:89
#define VA_ENTRY_PER_BUCKET
Definition: cnat_va_db.h:30
struct _va_entry va_entry_t
struct _va_bucket_t va_bucket_t
int va_db_delete_entry(u32 bucket_index, va_lookup_key *)
Definition: cnat_va_db.c:172
unsigned int u32
Definition: types.h:88
void va_bucket_init()
Definition: cnat_va_db.c:41
void va_db_add_new_entry(u32 bucket_index, va_lookup_key *)
Definition: cnat_va_db.c:55
unsigned short u16
Definition: types.h:57
va_entry_t e
Definition: cnat_va_db.h:53
va_bucket_t va_bucket[]
Definition: cnat_va_db.c:39