src/plugins/gbp/gbp_learn_node.c

   1 /*
   2  * Copyright (c) 2018 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 #include <plugins/gbp/gbp.h>
  17 #include <plugins/gbp/gbp_learn.h>
  18 #include <plugins/gbp/gbp_bridge_domain.h>
  19 #include <vlibmemory/api.h>
  20
  21 #include <vnet/util/throttle.h>
  22 #include <vnet/l2/l2_input.h>
  23 #include <vnet/fib/fib_table.h>
  24 #include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
  25
  26 #define GBP_LEARN_DBG(...)                                      \
  27     vlib_log_debug (gbp_learn_main.gl_logger, __VA_ARGS__);
  28
  29 #define foreach_gbp_learn                      \
  30   _(DROP,    "drop")
  31
  32 typedef enum
  33 {
  34 #define _(sym,str) GBP_LEARN_ERROR_##sym,
  35   foreach_gbp_learn
  36 #undef _
  37     GBP_LEARN_N_ERROR,
  38 } gbp_learn_error_t;
  39
  40 static char *gbp_learn_error_strings[] = {
  41 #define _(sym,string) string,
  42   foreach_gbp_learn
  43 #undef _
  44 };
  45
  46 typedef enum
  47 {
  48 #define _(sym,str) GBP_LEARN_NEXT_##sym,
  49   foreach_gbp_learn
  50 #undef _
  51     GBP_LEARN_N_NEXT,
  52 } gbp_learn_next_t;
  53
  54 typedef struct gbp_learn_l2_t_
  55 {
  56   ip46_address_t ip;
  57   mac_address_t mac;
  58   u32 sw_if_index;
  59   u32 bd_index;
  60   epg_id_t epg;
  61   ip46_address_t outer_src;
  62   ip46_address_t outer_dst;
  63 } gbp_learn_l2_t;
  64
  65
  66 static void
  67 gbp_learn_l2_cp (const gbp_learn_l2_t * gl2)
  68 {
  69   ip46_address_t *ips = NULL;
  70
  71   GBP_LEARN_DBG ("L2 EP: %U %U, %d",
  72                  format_mac_address_t, &gl2->mac,
  73                  format_ip46_address, &gl2->ip, IP46_TYPE_ANY, gl2->epg);
  74
  75   vec_add1 (ips, gl2->ip);
  76
  77   ASSERT (!ip46_address_is_zero (&gl2->outer_src));
  78   ASSERT (!ip46_address_is_zero (&gl2->outer_dst));
  79
  80   /*
  81    * flip the source and dst, since that's how it was received, this API
  82    * takes how it's sent
  83    */
  84   gbp_endpoint_update_and_lock (GBP_ENDPOINT_SRC_DP,
  85                                 gl2->sw_if_index, ips,
  86                                 &gl2->mac, INDEX_INVALID,
  87                                 INDEX_INVALID, gl2->epg,
  88                                 (GBP_ENDPOINT_FLAG_LEARNT |
  89                                  GBP_ENDPOINT_FLAG_REMOTE),
  90                                 &gl2->outer_dst, &gl2->outer_src, NULL);
  91   vec_free (ips);
  92 }
  93
  94 static void
  95 gbp_learn_l2_ip4_dp (const u8 * mac, const ip4_address_t * ip,
  96                      u32 bd_index, u32 sw_if_index, epg_id_t epg,
  97                      const ip4_address_t * outer_src,
  98                      const ip4_address_t * outer_dst)
  99 {
 100   gbp_learn_l2_t gl2 = {
 101     .sw_if_index = sw_if_index,
 102     .bd_index = bd_index,
 103     .epg = epg,
 104     .ip.ip4 = *ip,
 105     .outer_src.ip4 = *outer_src,
 106     .outer_dst.ip4 = *outer_dst,
 107   };
 108   mac_address_from_bytes (&gl2.mac, mac);
 109
 110   ASSERT (!ip46_address_is_zero (&gl2.outer_src));
 111   ASSERT (!ip46_address_is_zero (&gl2.outer_dst));
 112
 113   vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
 114 }
 115
 116 static void
 117 gbp_learn_l2_ip6_dp (const u8 * mac, const ip6_address_t * ip,
 118                      u32 bd_index, u32 sw_if_index, epg_id_t epg,
 119                      const ip4_address_t * outer_src,
 120                      const ip4_address_t * outer_dst)
 121 {
 122   gbp_learn_l2_t gl2 = {
 123     .sw_if_index = sw_if_index,
 124     .bd_index = bd_index,
 125     .epg = epg,
 126     .ip.ip6 = *ip,
 127     .outer_src.ip4 = *outer_src,
 128     .outer_dst.ip4 = *outer_dst,
 129   };
 130   mac_address_from_bytes (&gl2.mac, mac);
 131
 132   vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
 133 }
 134
 135 static void
 136 gbp_learn_l2_dp (const u8 * mac, u32 bd_index, u32 sw_if_index,
 137                  epg_id_t epg,
 138                  const ip4_address_t * outer_src,
 139                  const ip4_address_t * outer_dst)
 140 {
 141   gbp_learn_l2_t gl2 = {
 142     .sw_if_index = sw_if_index,
 143     .bd_index = bd_index,
 144     .epg = epg,
 145     .outer_src.ip4 = *outer_src,
 146     .outer_dst.ip4 = *outer_dst,
 147   };
 148   mac_address_from_bytes (&gl2.mac, mac);
 149
 150   vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
 151 }
 152
 153 /**
 154  * per-packet trace data
 155  */
 156 typedef struct gbp_learn_l2_trace_t_
 157 {
 158   /* per-pkt trace data */
 159   mac_address_t mac;
 160   u32 sw_if_index;
 161   u32 new;
 162   u32 throttled;
 163   u32 epg;
 164   u32 d_bit;
 165 } gbp_learn_l2_trace_t;
 166
 167 always_inline void
 168 gbp_learn_get_outer (const ethernet_header_t * eh0,
 169                      ip4_address_t * outer_src, ip4_address_t * outer_dst)
 170 {
 171   ip4_header_t *ip0;
 172   u8 *buff;
 173
 174   /* rewind back to the ivxlan header */
 175   buff = (u8 *) eh0;
 176   buff -= (sizeof (vxlan_gbp_header_t) +
 177            sizeof (udp_header_t) + sizeof (ip4_header_t));
 178
 179   ip0 = (ip4_header_t *) buff;
 180
 181   *outer_src = ip0->src_address;
 182   *outer_dst = ip0->dst_address;
 183 }
 184
 185 VLIB_NODE_FN (gbp_learn_l2_node) (vlib_main_t * vm,
 186                                   vlib_node_runtime_t * node,
 187                                   vlib_frame_t * frame)
 188 {
 189   u32 n_left_from, *from, *to_next, next_index, thread_index, seed;
 190   gbp_learn_main_t *glm;
 191   f64 time_now;
 192
 193   glm = &gbp_learn_main;
 194   next_index = 0;
 195   n_left_from = frame->n_vectors;
 196   from = vlib_frame_vector_args (frame);
 197   time_now = vlib_time_now (vm);
 198   thread_index = vm->thread_index;
 199
 200   seed = throttle_seed (&glm->gl_l2_throttle, thread_index, time_now);
 201
 202   while (n_left_from > 0)
 203     {
 204       u32 n_left_to_next;
 205
 206       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 207
 208       while (n_left_from > 0 && n_left_to_next > 0)
 209         {
 210           ip4_address_t outer_src, outer_dst;
 211           u32 bi0, sw_if_index0, t0, epg0;
 212           const ethernet_header_t *eh0;
 213           gbp_bridge_domain_t *gb0;
 214           gbp_learn_next_t next0;
 215           gbp_endpoint_t *ge0;
 216           vlib_buffer_t *b0;
 217
 218           next0 = GBP_LEARN_NEXT_DROP;
 219           bi0 = from[0];
 220           to_next[0] = bi0;
 221           from += 1;
 222           to_next += 1;
 223           n_left_from -= 1;
 224           n_left_to_next -= 1;
 225
 226           b0 = vlib_get_buffer (vm, bi0);
 227           sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 228
 229           eh0 = vlib_buffer_get_current (b0);
 230           epg0 = vnet_buffer2 (b0)->gbp.src_epg;
 231
 232           next0 = vnet_l2_feature_next (b0, glm->gl_l2_input_feat_next,
 233                                         L2INPUT_FEAT_GBP_LEARN);
 234
 235           ge0 = gbp_endpoint_find_mac (eh0->src_address,
 236                                        vnet_buffer (b0)->l2.bd_index);
 237           gb0 =
 238             gbp_bridge_domain_get_by_bd_index (vnet_buffer (b0)->l2.bd_index);
 239
 240           if ((vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D) ||
 241               (gb0->gb_flags & GBP_BD_FLAG_DO_NOT_LEARN))
 242             {
 243               t0 = 1;
 244               goto trace;
 245             }
 246
 247           /*
 248            * check for new EP or a moved EP
 249            */
 250           if (NULL == ge0 || ge0->ge_fwd.gef_itf != sw_if_index0)
 251
 252             {
 253               /*
 254                * use the last 4 bytes of the mac address as the hash for the EP
 255                */
 256               t0 = throttle_check (&glm->gl_l2_throttle, thread_index,
 257                                    *((u32 *) (eh0->src_address + 2)), seed);
 258               if (!t0)
 259                 {
 260                   gbp_learn_get_outer (eh0, &outer_src, &outer_dst);
 261
 262                   switch (clib_net_to_host_u16 (eh0->type))
 263                     {
 264                     case ETHERNET_TYPE_IP4:
 265                       {
 266                         const ip4_header_t *ip0;
 267
 268                         ip0 = (ip4_header_t *) (eh0 + 1);
 269
 270                         gbp_learn_l2_ip4_dp (eh0->src_address,
 271                                              &ip0->src_address,
 272                                              vnet_buffer (b0)->l2.bd_index,
 273                                              sw_if_index0, epg0,
 274                                              &outer_src, &outer_dst);
 275
 276                         break;
 277                       }
 278                     case ETHERNET_TYPE_IP6:
 279                       {
 280                         const ip6_header_t *ip0;
 281
 282                         ip0 = (ip6_header_t *) (eh0 + 1);
 283
 284                         gbp_learn_l2_ip6_dp (eh0->src_address,
 285                                              &ip0->src_address,
 286                                              vnet_buffer (b0)->l2.bd_index,
 287                                              sw_if_index0, epg0,
 288                                              &outer_src, &outer_dst);
 289
 290                         break;
 291                       }
 292                     default:
 293                       gbp_learn_l2_dp (eh0->src_address,
 294                                        vnet_buffer (b0)->l2.bd_index,
 295                                        sw_if_index0, epg0,
 296                                        &outer_src, &outer_dst);
 297                       break;
 298                     }
 299                 }
 300             }
 301           else
 302             {
 303               /*
 304                * this update could happen simultaneoulsy from multiple workers
 305                * but that's ok we are not interested in being very accurate.
 306                */
 307               t0 = 0;
 308               ge0->ge_last_time = time_now;
 309             }
 310         trace:
 311           if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
 312             {
 313               gbp_learn_l2_trace_t *t =
 314                 vlib_add_trace (vm, node, b0, sizeof (*t));
 315               clib_memcpy_fast (t->mac.bytes, eh0->src_address, 6);
 316               t->new = (NULL == ge0);
 317               t->throttled = t0;
 318               t->sw_if_index = sw_if_index0;
 319               t->epg = epg0;
 320               t->d_bit = ! !(vnet_buffer2 (b0)->gbp.flags &
 321                              VXLAN_GBP_GPFLAGS_D);
 322             }
 323
 324           /* verify speculative enqueue, maybe switch current next frame */
 325           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 326                                            to_next, n_left_to_next,
 327                                            bi0, next0);
 328         }
 329
 330       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 331     }
 332
 333   return frame->n_vectors;
 334 }
 335
 336 /* packet trace format function */
 337 static u8 *
 338 format_gbp_learn_l2_trace (u8 * s, va_list * args)
 339 {
 340   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
 341   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
 342   gbp_learn_l2_trace_t *t = va_arg (*args, gbp_learn_l2_trace_t *);
 343
 344   s = format (s, "new:%d throttled:%d d-bit:%d mac:%U itf:%d epg:%d",
 345               t->new, t->throttled, t->d_bit,
 346               format_mac_address_t, &t->mac, t->sw_if_index, t->epg);
 347
 348   return s;
 349 }
 350
 351 /* *INDENT-OFF* */
 352 VLIB_REGISTER_NODE (gbp_learn_l2_node) = {
 353   .name = "gbp-learn-l2",
 354   .vector_size = sizeof (u32),
 355   .format_trace = format_gbp_learn_l2_trace,
 356   .type = VLIB_NODE_TYPE_INTERNAL,
 357
 358   .n_errors = ARRAY_LEN(gbp_learn_error_strings),
 359   .error_strings = gbp_learn_error_strings,
 360
 361   .n_next_nodes = GBP_LEARN_N_NEXT,
 362
 363   .next_nodes = {
 364     [GBP_LEARN_NEXT_DROP] = "error-drop",
 365   },
 366 };
 367 /* *INDENT-ON* */
 368
 369 typedef struct gbp_learn_l3_t_
 370 {
 371   ip46_address_t ip;
 372   u32 fib_index;
 373   u32 sw_if_index;
 374   epg_id_t epg;
 375   ip46_address_t outer_src;
 376   ip46_address_t outer_dst;
 377 } gbp_learn_l3_t;
 378
 379 static void
 380 gbp_learn_l3_cp (const gbp_learn_l3_t * gl3)
 381 {
 382   ip46_address_t *ips = NULL;
 383
 384   GBP_LEARN_DBG ("L3 EP: %U, %d", format_ip46_address, &gl3->ip,
 385                  IP46_TYPE_ANY, gl3->epg);
 386
 387   vec_add1 (ips, gl3->ip);
 388
 389   gbp_endpoint_update_and_lock (GBP_ENDPOINT_SRC_DP,
 390                                 gl3->sw_if_index, ips, NULL,
 391                                 INDEX_INVALID, INDEX_INVALID, gl3->epg,
 392                                 (GBP_ENDPOINT_FLAG_REMOTE |
 393                                  GBP_ENDPOINT_FLAG_LEARNT),
 394                                 &gl3->outer_dst, &gl3->outer_src, NULL);
 395   vec_free (ips);
 396 }
 397
 398 static void
 399 gbp_learn_ip4_dp (const ip4_address_t * ip,
 400                   u32 fib_index, u32 sw_if_index, epg_id_t epg,
 401                   const ip4_address_t * outer_src,
 402                   const ip4_address_t * outer_dst)
 403 {
 404   /* *INDENT-OFF* */
 405   gbp_learn_l3_t gl3 = {
 406     .ip = {
 407       .ip4 = *ip,
 408     },
 409     .sw_if_index = sw_if_index,
 410     .fib_index = fib_index,
 411     .epg = epg,
 412     .outer_src.ip4 = *outer_src,
 413     .outer_dst.ip4 = *outer_dst,
 414   };
 415   /* *INDENT-ON* */
 416
 417   vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
 418 }
 419
 420 static void
 421 gbp_learn_ip6_dp (const ip6_address_t * ip,
 422                   u32 fib_index, u32 sw_if_index, epg_id_t epg,
 423                   const ip4_address_t * outer_src,
 424                   const ip4_address_t * outer_dst)
 425 {
 426   /* *INDENT-OFF* */
 427   gbp_learn_l3_t gl3 = {
 428     .ip = {
 429       .ip6 = *ip,
 430     },
 431     .sw_if_index = sw_if_index,
 432     .fib_index = fib_index,
 433     .epg = epg,
 434     .outer_src.ip4 = *outer_src,
 435     .outer_dst.ip4 = *outer_dst,
 436   };
 437   /* *INDENT-ON* */
 438
 439   vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
 440 }
 441
 442 /**
 443  * per-packet trace data
 444  */
 445 typedef struct gbp_learn_l3_trace_t_
 446 {
 447   /* per-pkt trace data */
 448   ip46_address_t ip;
 449   u32 sw_if_index;
 450   u32 new;
 451   u32 throttled;
 452   u32 epg;
 453 } gbp_learn_l3_trace_t;
 454
 455 static uword
 456 gbp_learn_l3 (vlib_main_t * vm,
 457               vlib_node_runtime_t * node, vlib_frame_t * frame,
 458               fib_protocol_t fproto)
 459 {
 460   u32 n_left_from, *from, *to_next, next_index, thread_index, seed;
 461   gbp_learn_main_t *glm;
 462   f64 time_now;
 463
 464   glm = &gbp_learn_main;
 465   next_index = 0;
 466   n_left_from = frame->n_vectors;
 467   from = vlib_frame_vector_args (frame);
 468   time_now = vlib_time_now (vm);
 469   thread_index = vm->thread_index;
 470
 471   seed = throttle_seed (&glm->gl_l3_throttle, thread_index, time_now);
 472
 473   while (n_left_from > 0)
 474     {
 475       u32 n_left_to_next;
 476
 477       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 478
 479       while (n_left_from > 0 && n_left_to_next > 0)
 480         {
 481           u32 bi0, sw_if_index0, t0, epg0, fib_index0;
 482           CLIB_UNUSED (const ip4_header_t *) ip4_0;
 483           CLIB_UNUSED (const ip6_header_t *) ip6_0;
 484           ip4_address_t outer_src, outer_dst;
 485           ethernet_header_t *eth0;
 486           gbp_learn_next_t next0;
 487           gbp_endpoint_t *ge0;
 488           vlib_buffer_t *b0;
 489
 490           next0 = GBP_LEARN_NEXT_DROP;
 491           bi0 = from[0];
 492           to_next[0] = bi0;
 493           from += 1;
 494           to_next += 1;
 495           n_left_from -= 1;
 496           n_left_to_next -= 1;
 497
 498           b0 = vlib_get_buffer (vm, bi0);
 499           sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 500           epg0 = vnet_buffer2 (b0)->gbp.src_epg;
 501           ip6_0 = NULL;
 502           ip4_0 = NULL;
 503
 504           vnet_feature_next (&next0, b0);
 505
 506           if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D)
 507             {
 508               t0 = 1;
 509               ge0 = NULL;
 510               goto trace;
 511             }
 512
 513           fib_index0 = fib_table_get_index_for_sw_if_index (fproto,
 514                                                             sw_if_index0);
 515
 516           if (FIB_PROTOCOL_IP6 == fproto)
 517             {
 518               ip6_0 = vlib_buffer_get_current (b0);
 519               eth0 = (ethernet_header_t *) (((u8 *) ip6_0) - sizeof (*eth0));
 520
 521               gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
 522
 523               ge0 = gbp_endpoint_find_ip6 (&ip6_0->src_address, fib_index0);
 524
 525               if (NULL == ge0)
 526                 {
 527                   t0 = throttle_check (&glm->gl_l3_throttle,
 528                                        thread_index,
 529                                        ip6_address_hash_to_u32
 530                                        (&ip6_0->src_address), seed);
 531
 532                   if (!t0)
 533                     {
 534                       gbp_learn_ip6_dp (&ip6_0->src_address,
 535                                         fib_index0, sw_if_index0, epg0,
 536                                         &outer_src, &outer_dst);
 537                     }
 538                 }
 539               else
 540                 {
 541                   /*
 542                    * this update could happen simultaneoulsy from multiple
 543                    * workers but that's ok we are not interested in being
 544                    * very accurate.
 545                    */
 546                   t0 = 0;
 547                   ge0->ge_last_time = time_now;
 548                 }
 549             }
 550           else
 551             {
 552               ip4_0 = vlib_buffer_get_current (b0);
 553               eth0 = (ethernet_header_t *) (((u8 *) ip4_0) - sizeof (*eth0));
 554
 555               gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
 556               ge0 = gbp_endpoint_find_ip4 (&ip4_0->src_address, fib_index0);
 557
 558               if (NULL == ge0)
 559                 {
 560                   t0 = throttle_check (&glm->gl_l3_throttle, thread_index,
 561                                        ip4_0->src_address.as_u32, seed);
 562
 563                   if (!t0)
 564                     {
 565                       gbp_learn_ip4_dp (&ip4_0->src_address,
 566                                         fib_index0, sw_if_index0, epg0,
 567                                         &outer_src, &outer_dst);
 568                     }
 569                 }
 570               else
 571                 {
 572                   /*
 573                    * this update could happen simultaneoulsy from multiple
 574                    * workers but that's ok we are not interested in being
 575                    * very accurate.
 576                    */
 577                   t0 = 0;
 578                   ge0->ge_last_time = time_now;
 579                 }
 580             }
 581         trace:
 582           if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
 583             {
 584               gbp_learn_l3_trace_t *t;
 585
 586               t = vlib_add_trace (vm, node, b0, sizeof (*t));
 587               if (FIB_PROTOCOL_IP6 == fproto && ip6_0)
 588                 ip46_address_set_ip6 (&t->ip, &ip6_0->src_address);
 589               if (FIB_PROTOCOL_IP4 == fproto && ip4_0)
 590                 ip46_address_set_ip4 (&t->ip, &ip4_0->src_address);
 591               t->new = (NULL == ge0);
 592               t->throttled = t0;
 593               t->sw_if_index = sw_if_index0;
 594               t->epg = epg0;
 595             }
 596
 597           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 598                                            to_next, n_left_to_next,
 599                                            bi0, next0);
 600         }
 601
 602       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 603     }
 604
 605   return frame->n_vectors;
 606 }
 607
 608 /* packet trace format function */
 609 static u8 *
 610 format_gbp_learn_l3_trace (u8 * s, va_list * args)
 611 {
 612   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
 613   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
 614   gbp_learn_l3_trace_t *t = va_arg (*args, gbp_learn_l3_trace_t *);
 615
 616   s = format (s, "new:%d throttled:%d ip:%U itf:%d epg:%d",
 617               t->new, t->throttled,
 618               format_ip46_address, &t->ip, IP46_TYPE_ANY, t->sw_if_index,
 619               t->epg);
 620
 621   return s;
 622 }
 623
 624 VLIB_NODE_FN (gbp_learn_ip4_node) (vlib_main_t * vm,
 625                                    vlib_node_runtime_t * node,
 626                                    vlib_frame_t * frame)
 627 {
 628   return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP4));
 629 }
 630
 631 VLIB_NODE_FN (gbp_learn_ip6_node) (vlib_main_t * vm,
 632                                    vlib_node_runtime_t * node,
 633                                    vlib_frame_t * frame)
 634 {
 635   return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP6));
 636 }
 637
 638 /* *INDENT-OFF* */
 639 VLIB_REGISTER_NODE (gbp_learn_ip4_node) = {
 640   .name = "gbp-learn-ip4",
 641   .vector_size = sizeof (u32),
 642   .format_trace = format_gbp_learn_l3_trace,
 643   .type = VLIB_NODE_TYPE_INTERNAL,
 644 };
 645
 646 VNET_FEATURE_INIT (gbp_learn_ip4, static) =
 647 {
 648   .arc_name = "ip4-unicast",
 649   .node_name = "gbp-learn-ip4",
 650 };
 651
 652 VLIB_REGISTER_NODE (gbp_learn_ip6_node) = {
 653   .name = "gbp-learn-ip6",
 654   .vector_size = sizeof (u32),
 655   .format_trace = format_gbp_learn_l3_trace,
 656   .type = VLIB_NODE_TYPE_INTERNAL,
 657 };
 658
 659 VNET_FEATURE_INIT (gbp_learn_ip6, static) =
 660 {
 661   .arc_name = "ip6-unicast",
 662   .node_name = "gbp-learn-ip6",
 663 };
 664
 665 /* *INDENT-ON* */
 666
 667 /*
 668  * fd.io coding-style-patch-verification: ON
 669  *
 670  * Local Variables:
 671  * eval: (c-set-style "gnu")
 672  * End:
 673  */