vnet/vnet/mpls/mpls.h

   1 /*
   2  * Copyright (c) 2015 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_vnet_mpls_gre_h
  16 #define included_vnet_mpls_gre_h
  17
  18 #include <vnet/vnet.h>
  19 #include <vnet/gre/gre.h>
  20 #include <vnet/mpls/packet.h>
  21 #include <vnet/mpls/mpls_types.h>
  22 #include <vnet/ip/ip4_packet.h>
  23 #include <vnet/ethernet/ethernet.h>
  24 #include <vnet/fib/fib_node.h>
  25 #include <vnet/adj/adj.h>
  26
  27 typedef CLIB_PACKED (struct {
  28   ip4_header_t ip4;             /* 20 bytes */
  29   gre_header_t gre;             /* 4 bytes */
  30   mpls_unicast_header_t labels[0];   /* 4 bytes each */
  31 }) ip4_gre_and_mpls_header_t;
  32
  33 extern vnet_hw_interface_class_t mpls_gre_hw_interface_class;
  34
  35 typedef enum {
  36 #define mpls_error(n,s) MPLS_ERROR_##n,
  37 #include <vnet/mpls/error.def>
  38 #undef mpls_error
  39   MPLS_N_ERROR,
  40 } mpls_gre_error_t;
  41
  42 /*
  43  * No protocol info, MPLS labels don't have a next-header field
  44  * presumably the label field tells all...
  45  */
  46
  47 typedef struct {
  48   fib_node_t mgt_node;
  49   ip4_address_t tunnel_src;
  50   ip4_address_t tunnel_dst;
  51   ip4_address_t intfc_address;
  52   u32 mask_width;
  53   u32 inner_fib_index;
  54   u32 outer_fib_index;
  55   u32 encap_index;
  56   u32 hw_if_index;              /* L2 x-connect capable tunnel intfc */
  57   u8 * rewrite_data;
  58   u8 l2_only;
  59   fib_node_index_t fei; /* FIB Entry index for the tunnel's destination */
  60   adj_index_t adj_index; /* The midchain adj this tunnel creates */
  61   u32 sibling_index;
  62 } mpls_gre_tunnel_t;
  63
  64 typedef struct {
  65   u8 tunnel_dst[6];
  66   ip4_address_t intfc_address;
  67   u32 tx_sw_if_index;
  68   u32 inner_fib_index;
  69   u32 mask_width;
  70   u32 encap_index;
  71   u32 hw_if_index;
  72   u8 * rewrite_data;
  73   u8 l2_only;
  74   fib_node_index_t fei;
  75 } mpls_eth_tunnel_t;
  76
  77 typedef struct {
  78   mpls_unicast_header_t *labels;
  79   /* only for policy tunnels */
  80   u8 * rewrite;
  81   u32 output_next_index;
  82 } mpls_encap_t;
  83
  84 typedef struct {
  85   u32 tx_fib_index;
  86   u32 next_index;               /* e.g. ip4/6-input, l2-input */
  87 } mpls_decap_t;
  88
  89 #define MPLS_FIB_DEFAULT_TABLE_ID 0
  90
  91 /**
  92  * Type exposure is to allow the DP fast/inlined access
  93  */
  94 #define MPLS_FIB_KEY_SIZE 21
  95 #define MPLS_FIB_DB_SIZE (1 << (MPLS_FIB_KEY_SIZE-1))
  96
  97 typedef struct mpls_fib_t_
  98 {
  99   /**
 100    * A hash table of entries. 21 bit key
 101    * Hash table for reduced memory footprint
 102    */
 103   uword * mf_entries;
 104
 105   /**
 106    * The load-balance indeices keyed by 21 bit label+eos bit.
 107    * A flat array for maximum lookup performace.
 108    */
 109   index_t mf_lbs[MPLS_FIB_DB_SIZE];
 110 } mpls_fib_t;
 111
 112 /**
 113  * @brief Definition of a callback for receiving MPLS interface state change
 114  * notifications
 115  */
 116 typedef void (*mpls_interface_state_change_callback_t)(u32 sw_if_index,
 117                                                        u32 is_enable);
 118
 119 typedef struct {
 120   /* MPLS FIB index for each software interface */
 121   u32 *fib_index_by_sw_if_index;
 122
 123   /**  A pool of all the MPLS FIBs */
 124   struct fib_table_t_ *fibs;
 125
 126   /** A hash table to lookup the mpls_fib by table ID */
 127   uword *fib_index_by_table_id;
 128
 129   /* rx/tx interface/feature configuration. */
 130   ip_config_main_t feature_config_mains[VNET_N_IP_FEAT];
 131
 132   /* Built-in unicast feature path indices, see vnet_feature_arc_init(...)  */
 133   u32 mpls_rx_feature_lookup;
 134   u32 mpls_rx_feature_not_enabled;
 135   u32 mpls_tx_feature_interface_output;
 136
 137   /* pool of gre tunnel instances */
 138   mpls_gre_tunnel_t *gre_tunnels;
 139   u32 * free_gre_sw_if_indices;
 140
 141   /* pool of ethernet tunnel instances */
 142   mpls_eth_tunnel_t *eth_tunnels;
 143   u32 * free_eth_sw_if_indices;
 144
 145   /* Encap side: map (fib, dst_address) to mpls label stack */
 146   mpls_encap_t * encaps;
 147   uword * mpls_encap_by_fib_and_dest;
 148
 149   /* Decap side: map rx label to FIB */
 150   mpls_decap_t * decaps;
 151   uword * mpls_decap_by_rx_fib_and_label;
 152
 153   /* mpls-o-e policy tunnel next index for ip4/ip6-classify */
 154   u32 ip4_classify_mpls_policy_encap_next_index;
 155   u32 ip6_classify_mpls_policy_encap_next_index;
 156
 157   /* feature path configuration lists */
 158   vnet_feature_registration_t * next_feature[VNET_N_IP_FEAT];
 159
 160   /* Save feature results for show command */
 161   char **feature_nodes[VNET_N_IP_FEAT];
 162
 163   /* IP4 enabled count by software interface */
 164   u8 * mpls_enabled_by_sw_if_index;
 165
 166   /* convenience */
 167   vlib_main_t * vlib_main;
 168   vnet_main_t * vnet_main;
 169 } mpls_main_t;
 170
 171 extern mpls_main_t mpls_main;
 172
 173 #define VNET_MPLS_FEATURE_INIT(x,...)                           \
 174   __VA_ARGS__ vnet_feature_registration_t uc_##x;            \
 175 static void __vnet_add_feature_registration_uc_##x (void)       \
 176   __attribute__((__constructor__)) ;                            \
 177 static void __vnet_add_feature_registration_uc_##x (void)       \
 178 {                                                               \
 179   mpls_main_t * mm = &mpls_main;                                \
 180   uc_##x.next = mm->next_feature[VNET_IP_RX_UNICAST_FEAT];      \
 181   mm->next_feature[VNET_IP_RX_UNICAST_FEAT] = &uc_##x;          \
 182 }                                                               \
 183 __VA_ARGS__ vnet_feature_registration_t uc_##x
 184
 185 #define VNET_MPLS_TX_FEATURE_INIT(x,...)                        \
 186   __VA_ARGS__ vnet_feature_registration_t tx_##x;            \
 187 static void __vnet_add_feature_registration_tx_##x (void)       \
 188   __attribute__((__constructor__)) ;                            \
 189 static void __vnet_add_feature_registration_tx_##x (void)       \
 190 {                                                               \
 191   mpls_main_t * mm = &mpls_main;                                \
 192   tx_##x.next = mm->next_feature[VNET_IP_TX_FEAT];              \
 193   mm->next_feature[VNET_IP_TX_FEAT] = &tx_##x;                  \
 194 }                                                               \
 195 __VA_ARGS__ vnet_feature_registration_t tx_##x
 196
 197 extern clib_error_t * mpls_feature_init(vlib_main_t * vm);
 198
 199 format_function_t format_mpls_protocol;
 200 format_function_t format_mpls_gre_header_with_length;
 201 format_function_t format_mpls_eth_header_with_length;
 202 format_function_t format_mpls_encap_index;
 203
 204 format_function_t format_mpls_eos_bit;
 205 format_function_t format_mpls_unicast_header_net_byte_order;
 206 format_function_t format_mpls_unicast_label;
 207 format_function_t format_mpls_header;
 208
 209 extern vlib_node_registration_t mpls_input_node;
 210 extern vlib_node_registration_t mpls_policy_encap_node;
 211 extern vlib_node_registration_t mpls_output_node;
 212 extern vlib_node_registration_t mpls_midchain_node;
 213
 214 extern vnet_device_class_t mpls_gre_device_class;
 215
 216 /* Parse mpls protocol as 0xXXXX or protocol name.
 217    In either host or network byte order. */
 218 unformat_function_t unformat_mpls_protocol_host_byte_order;
 219 unformat_function_t unformat_mpls_protocol_net_byte_order;
 220 unformat_function_t unformat_mpls_label_net_byte_order;
 221 unformat_function_t unformat_mpls_gre_header;
 222 unformat_function_t unformat_pg_mpls_gre_header;
 223 unformat_function_t unformat_mpls_unicast_label;
 224
 225 /* Parse mpls header. */
 226 unformat_function_t unformat_mpls_header;
 227 unformat_function_t unformat_pg_mpls_header;
 228
 229 /* manually added to the interface output node in mpls.c */
 230 #define MPLS_GRE_OUTPUT_NEXT_LOOKUP     1
 231 #define MPLS_GRE_OUTPUT_NEXT_DROP       VNET_INTERFACE_TX_NEXT_DROP
 232
 233 void mpls_sw_interface_enable_disable (mpls_main_t * mm,
 234                                        u32 sw_if_index,
 235                                        u8 is_enable);
 236
 237 u8 mpls_sw_interface_is_enabled (u32 sw_if_index);
 238
 239 mpls_encap_t *
 240 mpls_encap_by_fib_and_dest (mpls_main_t * mm, u32 rx_fib, u32 dst_address);
 241
 242 int mpls_label_from_fib_id_and_dest (mpls_main_t *gm, u32 fib_id,
 243                                      u32 dst_address, u32 *labelp);
 244
 245 int vnet_mpls_gre_add_del_tunnel (ip4_address_t *src,
 246                                   ip4_address_t *dst,
 247                                   ip4_address_t *intfc,
 248                                   u32 mask_width,
 249                                   u32 inner_fib_id, u32 outer_fib_id,
 250                                   u32 * tunnel_intfc_sw_if_index,
 251                                   u8 l2_only,
 252                                   u8 is_add);
 253
 254 int vnet_mpls_ethernet_add_del_tunnel (u8 *dst,
 255                                        ip4_address_t *intfc,
 256                                        u32 mask_width,
 257                                        u32 inner_fib_id,
 258                                        u32 tx_sw_if_index,
 259                                        u32 * tunnel_sw_if_index,
 260                                        u8 l2_only,
 261                                        u8 is_add);
 262
 263 int vnet_mpls_gre_delete_fib_tunnels (u32 fib_id);
 264
 265 int mpls_fib_reset_labels (u32 fib_id);
 266
 267 int vnet_mpls_add_del_decap (u32 rx_fib_id,
 268                              u32 tx_fib_id,
 269                              u32 label_host_byte_order,
 270                              int s_bit, int next_index, int is_add);
 271
 272 int vnet_mpls_add_del_encap (ip4_address_t *dest, u32 fib_id,
 273                              u32 *labels_host_byte_order,
 274                              u32 policy_tunnel_index,
 275                              int no_dst_hash, u32 * indexp, int is_add);
 276
 277 int vnet_mpls_policy_tunnel_add_rewrite (mpls_main_t * mm,
 278                                          mpls_encap_t * e,
 279                                          u32 policy_tunnel_index);
 280
 281 typedef struct {
 282   u32 lookup_miss;
 283
 284   /* Tunnel-id / index in tunnel vector */
 285   u32 tunnel_id;
 286
 287   /* mpls encap index */
 288   u32 mpls_encap_index;
 289
 290   /* pkt length */
 291   u32 length;
 292
 293   /* tunnel ip4 addresses */
 294   ip4_address_t src;
 295   ip4_address_t dst;
 296 } mpls_gre_tx_trace_t;
 297
 298 u8 * format_mpls_gre_tx_trace (u8 * s, va_list * args);
 299 u8 * format_mpls_gre_header (u8 * s, va_list * args);
 300
 301 #define foreach_mpls_input_next                 \
 302 _(DROP, "error-drop")                           \
 303 _(LOOKUP, "mpls-lookup")
 304
 305 typedef enum {
 306 #define _(s,n) MPLS_INPUT_NEXT_##s,
 307   foreach_mpls_input_next
 308 #undef _
 309   MPLS_INPUT_N_NEXT,
 310 } mpls_input_next_t;
 311
 312 #define foreach_mpls_lookup_next                \
 313 _(DROP, "error-drop")                           \
 314 _(IP4_INPUT, "ip4-input")                       \
 315 _(L2_OUTPUT, "l2-output")
 316
 317 // FIXME remove.
 318 typedef enum {
 319 #define _(s,n) MPLS_LOOKUP_NEXT_##s,
 320   foreach_mpls_lookup_next
 321 #undef _
 322   MPLS_LOOKUP_N_NEXT,
 323 } mpls_lookup_next_t;
 324
 325 #define foreach_mpls_output_next                \
 326 _(DROP, "error-drop")
 327
 328 typedef enum {
 329 #define _(s,n) MPLS_OUTPUT_NEXT_##s,
 330   foreach_mpls_output_next
 331 #undef _
 332   MPLS_OUTPUT_N_NEXT,
 333 } mpls_output_next_t;
 334
 335 typedef struct {
 336   u32 lookup_miss;
 337
 338   /* Tunnel-id / index in tunnel vector */
 339   u32 tunnel_id;
 340
 341   /* output interface */
 342   u32 tx_sw_if_index;
 343
 344   /* mpls encap index */
 345   u32 mpls_encap_index;
 346
 347   /* pkt length */
 348   u32 length;
 349
 350   u8 dst[6];
 351 } mpls_eth_tx_trace_t;
 352
 353 u8 * format_mpls_eth_tx_trace (u8 * s, va_list * args);
 354
 355 typedef struct {
 356   u32 fib_index;
 357   u32 entry_index;
 358   u32 dest;
 359   u32 s_bit;
 360   u32 label;
 361 } show_mpls_fib_t;
 362
 363 int
 364 mpls_dest_cmp(void * a1, void * a2);
 365
 366 int
 367 mpls_fib_index_cmp(void * a1, void * a2);
 368
 369 int
 370 mpls_label_cmp(void * a1, void * a2);
 371
 372 #endif /* included_vnet_mpls_gre_h */