FD.io VPP  v19.04.2-12-g66b1689
Vector Packet Processing
session_table.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2017-2019 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef SRC_VNET_SESSION_SESSION_TABLE_H_
17 #define SRC_VNET_SESSION_SESSION_TABLE_H_
18 
19 #include <vppinfra/bihash_16_8.h>
20 #include <vppinfra/bihash_48_8.h>
22 
23 typedef struct _session_lookup_table
24 {
25  /**
26  * Lookup tables for established sessions and listeners
27  */
28  clib_bihash_16_8_t v4_session_hash;
29  clib_bihash_48_8_t v6_session_hash;
30 
31  /**
32  * Lookup tables for half-open sessions
33  */
34  clib_bihash_16_8_t v4_half_open_hash;
35  clib_bihash_48_8_t v6_half_open_hash;
36 
37  /**
38  * Per fib proto and transport proto session rules tables
39  */
41 
42  /** Flag that indicates if table has local scope */
43  u8 is_local;
44 
45  /** Namespace this table belongs to */
46  u32 appns_index;
47 
48  /** For global tables only one fib proto is active. This is a
49  * byproduct of fib table ids not necessarily being the same for
50  * identical fib idices of v4 and v6 fib protos */
51  u8 active_fib_proto;
52  /* Required for pool_get_aligned(...) */
53  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
55 
56 #define SESSION_TABLE_INVALID_INDEX ((u32)~0)
57 #define SESSION_LOCAL_TABLE_PREFIX ((u32)~0)
58 #define SESSION_INVALID_INDEX ((u32)~0)
59 #define SESSION_INVALID_HANDLE ((u64)~0)
60 #define SESSION_DROP_HANDLE (((u64)~0) - 1)
61 
63  void *ctx);
64 
65 void ip4_session_table_walk_cb (clib_bihash_kv_16_8_t * kvp, void *arg);
66 void ip4_session_table_walk (clib_bihash_16_8_t * hash,
67  ip4_session_table_walk_fn_t fn, void *arg);
68 
72 void session_table_init (session_table_t * slt, u8 fib_proto);
73 
74 /* Internal, try not to use it! */
75 session_table_t *_get_session_tables ();
76 
77 #define session_table_foreach(VAR, BODY) \
78  pool_foreach(VAR, _get_session_tables (), BODY)
79 
80 #endif /* SRC_VNET_SESSION_SESSION_TABLE_H_ */
81 /* *INDENT-ON* */
82 /*
83  * fd.io coding-style-patch-verification: ON
84  *
85  * Local Variables:
86  * eval: (c-set-style "gnu")
87  * End:
88  */
#define CLIB_CACHE_LINE_ALIGN_MARK(mark)
Definition: cache.h:60
struct _session_rules_table_t session_rules_table_t
int(* ip4_session_table_walk_fn_t)(clib_bihash_kv_16_8_t *kvp, void *ctx)
Definition: session_table.h:62
void ip4_session_table_walk_cb(clib_bihash_kv_16_8_t *kvp, void *arg)
unsigned char u8
Definition: types.h:56
unsigned int u32
Definition: types.h:88
u32 session_table_index(session_table_t *slt)
Definition: session_table.c:40
void ip4_session_table_walk(clib_bihash_16_8_t *hash, ip4_session_table_walk_fn_t fn, void *arg)
long ctx[MAX_CONNS]
Definition: main.c:144
void session_table_init(session_table_t *slt, u8 fib_proto)
Initialize session table hash tables.
Definition: session_table.c:70
session_table_t * session_table_get(u32 table_index)
Definition: session_table.c:46
session_table_t * session_table_alloc(void)
Definition: session_table.c:31
struct _session_lookup_table session_table_t