src/plugins/nat/dslite.h

   1 /*
   2  * Copyright (c) 2017 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 #ifndef __included_dslite_h__
  16 #define __included_dslite_h__
  17
  18 #include <vppinfra/bihash_8_8.h>
  19 #include <vppinfra/bihash_16_8.h>
  20 #include <vppinfra/bihash_24_8.h>
  21 #include <nat/nat.h>
  22
  23 typedef struct
  24 {
  25   union
  26   {
  27     struct
  28     {
  29       ip6_address_t softwire_id;
  30       ip4_address_t addr;
  31       u16 port;
  32       u8 proto;
  33       u8 pad;
  34     };
  35     u64 as_u64[3];
  36   };
  37 } dslite_session_key_t;
  38
  39 /* *INDENT-OFF* */
  40 typedef CLIB_PACKED (struct
  41 {
  42   snat_session_key_t out2in;
  43   dslite_session_key_t in2out;
  44   u32 per_b4_index;
  45   u32 per_b4_list_head_index;
  46   f64 last_heard;
  47   u64 total_bytes;
  48   u32 total_pkts;
  49   u32 outside_address_index;
  50 }) dslite_session_t;
  51 /* *INDENT-ON* */
  52
  53 typedef struct
  54 {
  55   ip6_address_t addr;
  56   u32 sessions_per_b4_list_head_index;
  57   u32 nsessions;
  58 } dslite_b4_t;
  59
  60 typedef struct
  61 {
  62   /* Main lookup tables */
  63   clib_bihash_8_8_t out2in;
  64   clib_bihash_24_8_t in2out;
  65
  66   /* Find a B4 */
  67   clib_bihash_16_8_t b4_hash;
  68
  69   /* B4 pool */
  70   dslite_b4_t *b4s;
  71
  72   /* Session pool */
  73   dslite_session_t *sessions;
  74
  75   /* Pool of doubly-linked list elements */
  76   dlist_elt_t *list_pool;
  77 } dslite_per_thread_data_t;
  78
  79 typedef struct
  80 {
  81   ip6_address_t aftr_ip6_addr;
  82   ip4_address_t aftr_ip4_addr;
  83   ip6_address_t b4_ip6_addr;
  84   ip4_address_t b4_ip4_addr;
  85   dslite_per_thread_data_t *per_thread_data;
  86   snat_address_t *addr_pool;
  87   u32 num_workers;
  88   u32 first_worker_index;
  89   u16 port_per_thread;
  90
  91   /* If set then the DSLite component behaves as CPE/B4
  92    * otherwise it behaves as AFTR */
  93   u8 is_ce;
  94 } dslite_main_t;
  95
  96 typedef struct
  97 {
  98   u32 next_index;
  99   u32 session_index;
 100 } dslite_trace_t;
 101
 102 typedef struct
 103 {
 104   u32 next_index;
 105 } dslite_ce_trace_t;
 106
 107 #define foreach_dslite_error                    \
 108 _(IN2OUT, "valid in2out DS-Lite packets")       \
 109 _(OUT2IN, "valid out2in DS-Lite packets")       \
 110 _(CE_ENCAP, "valid CE encap DS-Lite packets")   \
 111 _(CE_DECAP, "valid CE decap DS-Lite packets")   \
 112 _(NO_TRANSLATION, "no translation")             \
 113 _(BAD_IP6_PROTOCOL, "bad ip6 protocol")         \
 114 _(OUT_OF_PORTS, "out of ports")                 \
 115 _(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
 116 _(BAD_ICMP_TYPE, "unsupported icmp type")       \
 117 _(UNKNOWN, "unknown")
 118
 119 typedef enum
 120 {
 121 #define _(sym,str) DSLITE_ERROR_##sym,
 122   foreach_dslite_error
 123 #undef _
 124     DSLITE_N_ERROR,
 125 } dslite_error_t;
 126
 127 extern dslite_main_t dslite_main;
 128 extern vlib_node_registration_t dslite_in2out_node;
 129 extern vlib_node_registration_t dslite_in2out_slowpath_node;
 130 extern vlib_node_registration_t dslite_out2in_node;
 131 extern vlib_node_registration_t dslite_ce_encap_node;
 132 extern vlib_node_registration_t dslite_ce_decap_node;
 133
 134 void dslite_init (vlib_main_t * vm);
 135 void dslite_set_ce (dslite_main_t * dm, u8 set);
 136 int dslite_set_aftr_ip6_addr (dslite_main_t * dm, ip6_address_t * addr);
 137 int dslite_set_b4_ip6_addr (dslite_main_t * dm, ip6_address_t * addr);
 138 int dslite_set_aftr_ip4_addr (dslite_main_t * dm, ip4_address_t * addr);
 139 int dslite_set_b4_ip4_addr (dslite_main_t * dm, ip4_address_t * addr);
 140 int dslite_add_del_pool_addr (dslite_main_t * dm, ip4_address_t * addr,
 141                               u8 is_add);
 142 u8 *format_dslite_trace (u8 * s, va_list * args);
 143 u8 *format_dslite_ce_trace (u8 * s, va_list * args);
 144
 145 #endif /* __included_dslite_h__ */
 146
 147 /*
 148  * fd.io coding-style-patch-verification: ON
 149  *
 150  * Local Variables:
 151  * eval: (c-set-style "gnu")
 152  * End:
 153  */