vnet/vnet/vcgn/dslite_db.h

   1 /*
   2  *------------------------------------------------------------------
   3  * dslite_db.h - Stateful DSLITE translation database definitions
   4  *
   5  * Copyright (c) 2010-2013 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 #ifndef __DSLITE_DB_H__
  20 #define __DSLITE_DB_H__
  21
  22 #include "cnat_cli.h"
  23 #include "index_list.h"
  24 #include "cnat_ports.h"
  25 #include "cnat_db.h"
  26 #include "dslite_defs.h"
  27
  28 #define DSLITE_PRINTF(level, ...)  \
  29     if (dslite_debug_level > level) PLATFORM_DEBUG_PRINT(__VA_ARGS__);
  30 /*
  31 #define DSLITE_PRINTF(lvl, ...)                 \
  32 {                                                     \
  33         avsm_dispatlib_debug (__VA_ARGS__);           \
  34 }
  35 */
  36
  37 #define HASH_ENHANCE 4
  38 //#define DSLITE_DEF
  39 #define DSLITE_MAIN_DB_SIZE (20000000 / PLATFORM_CNAT_INSTS)
  40 #define DSLITE_MAIN_HASH_SIZE \
  41          (HASH_ENHANCE * PLATFORM_CNAT_MAIN_PRELIM_HASH_SIZE)
  42
  43 #define DSLITE_MAIN_HASH_MASK (DSLITE_MAIN_HASH_SIZE-1)
  44
  45
  46 /* nb: 200000 users / 64 CNAT = 3125, 76% occupancy */
  47 #define DSLITE_USER_HASH_SIZE CNAT_USER_HASH_SIZE
  48 #define DSLITE_USER_HASH_MASK (DSLITE_USER_HASH_SIZE-1)
  49
  50 /* No. of per ip/port config will be limited to 1000 */
  51 #define DSLITE_TIMEOUT_HASH_SIZE 1000
  52 #define DSLITE_TIMEOUT_HASH_MASK (DSLITE_TIMEOUT_HASH_SIZE - 1)
  53 #define DSLITE_TIMEOUT_FULL_MASK 0xFFFFFFFFFFFFFFFF
  54
  55 #define CNAT_MAX_SESSIONS_PER_BIB  0xFFFF
  56
  57 #define FORCE_DEL 1 /* Delete static BIB entries as well */
  58
  59 /* default timeout values */
  60 #define DSLITE_UDP_DEFAULT          300  /* 5 min */
  61 #define DSLITE_UDP_MIN              120  /* 2 min */
  62 #define DSLITE_TCP_TRANS            240  /* 4 min */
  63 #define DSLITE_TCP_EST             7200  /* 2 hrs */
  64 #define DSLITE_TCP_V4_SYN             6  /* 6 sec */
  65 #define DSLITE_FRAG_MIN               2  /* 2 sec */
  66 #define DSLITE_ICMP_DEFAULT          60  /* 1 min */
  67
  68 extern u32 dslite_translation_create_count;
  69 extern u32 dslite_translation_delete_count;
  70 extern u32 dslite_translation_create_rate;
  71 extern u32 dslite_translation_delete_rate;
  72 extern u32 dslite_in2out_forwarding_count;
  73 extern u32 dslite_in2out_forwarding_rate;
  74 extern u32 dslite_out2in_forwarding_count;
  75 extern u32 dslite_out2in_forwarding_rate;
  76
  77 #define DSLITE_V6_GET_HASH(in_key, hash, mask) \
  78     a = in_key->ipv6[0] ^ in_key->ipv6[1] ^ in_key->ipv6[2] ^ in_key->ipv6[3] \
  79          ^ in_key->ipv4_key.k.ipv4 ^ ((in_key->ipv4_key.k.port << 16) | in_key->ipv4_key.k.vrf); \
  80     DSLITE_PRINTF(1, "%x:%x:%x:%x:%x:%x:%x\n", in_key->ipv6[0], in_key->ipv6[1], in_key->ipv6[2], in_key->ipv6[3], \
  81                   in_key->ipv4_key.k.ipv4, in_key->ipv4_key.k.port, in_key->ipv4_key.k.vrf);  \
  82     b = c = 0x9e3779b9;\
  83     /* Jenkins hash, arbitrarily use c as the "answer" */ \
  84     hash_mix32(a, b, c); \
  85     hash = c & mask; \
  86
  87
  88 #define DSLITE_V6_GET_USER_HASH(ipv6, hash, mask) \
  89     a = ipv6[0] ^ ipv6[1] ^ ipv6[2] ^ ipv6[3]; \
  90     b = c = 0x9e3779b9;\
  91     /* Jenkins hash, arbitrarily use c as the "answer" */ \
  92     hash_mix32(a, b, c); \
  93     hash = c & mask; \
  94
  95 #define DSLITE_V4_GET_HASH(in_key, hash, mask) \
  96     a = in_key.ipv4 ^ ((in_key.port << 16) | in_key.vrf); \
  97     b = c = 0x9e3779b9; \
  98     /* Jenkins hash, arbitrarily use c as the "answer" */ \
  99     hash_mix32(a, b, c); \
 100     hash = c & mask;
 101
 102 #define PRIVATE_V4_ADDR_CHECK(addr, invalid) \
 103     invalid = 0; \
 104     int range1 = ((addr & 0xFF000000) >> 24); \
 105     int range2 = ((addr & 0xFFF00000) >> 20); \
 106     int range3 = ((addr & 0xFFFF0000) >> 16); \
 107     int range4 = ((addr & 0xFFFFFFF8) >> 3);  \
 108     if(range1 != 0xa && range2 != 0xac1 && range3 != 0xc0a8  && range4 != 0x18000000) \
 109         invalid = 1;
 110
 111 #define V4_MAPPED_V6_CHECK(v6_addr, invalid) \
 112     invalid = 0; \
 113     int word1 = v6_addr[0]; \
 114     int word2 = v6_addr[1]; \
 115     int word3 = v6_addr[2]; \
 116     if(!((word1 == 0) && (word2 == 0) && (word3 == 0x0000FFFF))) \
 117         invalid = 1;
 118
 119
 120 extern dslite_table_entry_t         dslite_table_array[DSLITE_MAX_DSLITE_ENTRIES];
 121 extern dslite_table_entry_t         *dslite_table_ptr;
 122
 123 #define DSLITE_CMP_V6_KEY(key1, key2) \
 124        memcmp(key1, key2, sizeof(dslite_v6_key_t))
 125
 126 #define DSLITE_CMP_V4_KEY(key1, key2) \
 127        memcmp(key1, key2, sizeof(dslite_v4_key_t))
 128
 129
 130 #define DSLITE_CMP_V6_IP(ip1, ip2) \
 131        memcmp(ip1, ip2, (sizeof(u32) * 4))
 132
 133
 134 #define DSLITE_CMP_V6_KEY1(key1, key2) \
 135     (key1.ipv6[0] == key2.ipv6[0]) && (key1.ipv6[1] == key2.ipv6[1]) && \
 136     (key1.ipv6[2] == key2.ipv6[2]) &&  (key1.ipv6[3] == key2.ipv6[3]) && \
 137     (key1.port == key2.port) && (key1.vrf == key2.vrf)
 138
 139
 140 #define DSLITE_CMP_V6_IP1(ip1, ip2) \
 141     ((ip1[0] == ip2[0]) && (ip1[1] == ip2[1]) && \
 142     (ip1[2] == ip2[2]) && (ip1[3] == ip2[3]))
 143
 144 #define DSLITE_CMP_V4_KEY1(key1, key2) \
 145        (key1.key64 == key2.key64)
 146
 147 cnat_main_db_entry_t*
 148 dslite_get_main_db_entry_v2(dslite_db_key_bucket_t *ki,
 149                        port_pair_t port_pair_type,
 150                        port_type_t port_type,
 151                        cnat_gen_icmp_info *info,
 152                        dslite_table_entry_t *dslite_entry_ptr,
 153                        cnat_key_t *dest_info);
 154
 155 cnat_main_db_entry_t*
 156 dslite_main_db_lookup_entry(dslite_db_key_bucket_t *ki);
 157
 158
 159 cnat_user_db_entry_t*
 160 dslite_user_db_lookup_entry(dslite_db_key_bucket_t *uki);
 161
 162 cnat_user_db_entry_t*
 163 dslite_user_db_create_entry(dslite_db_key_bucket_t *uki, u32 portmap_index);
 164
 165 cnat_main_db_entry_t*
 166 dslite_create_main_db_entry_and_hash(dslite_db_key_bucket_t *ki,
 167                                      cnat_db_key_bucket_t *ko,
 168                                      cnat_user_db_entry_t *udb);
 169
 170 #endif