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 #include <vnet/ethernet/arp_packet.h>
  26
  27 #define GBP_LEARN_DBG(...)                                      \
  28     vlib_log_debug (gbp_learn_main.gl_logger, __VA_ARGS__);
  29
  30 #define foreach_gbp_learn                      \
  31   _(DROP,    "drop")
  32
  33 typedef enum
  34 {
  35 #define _(sym,str) GBP_LEARN_ERROR_##sym,
  36   foreach_gbp_learn
  37 #undef _
  38     GBP_LEARN_N_ERROR,
  39 } gbp_learn_error_t;
  40
  41 static char *gbp_learn_error_strings[] = {
  42 #define _(sym,string) string,
  43   foreach_gbp_learn
  44 #undef _
  45 };
  46
  47 typedef enum
  48 {
  49 #define _(sym,str) GBP_LEARN_NEXT_##sym,
  50   foreach_gbp_learn
  51 #undef _
  52     GBP_LEARN_N_NEXT,
  53 } gbp_learn_next_t;
  54
  55 typedef struct gbp_learn_l2_t_
  56 {
  57   ip46_address_t ip;
  58   mac_address_t mac;
  59   u32 sw_if_index;
  60   u32 bd_index;
  61   epg_id_t epg;
  62   ip46_address_t outer_src;
  63   ip46_address_t outer_dst;
  64 } gbp_learn_l2_t;
  65
  66
  67 static void
  68 gbp_learn_l2_cp (const gbp_learn_l2_t * gl2)
  69 {
  70   ip46_address_t *ips = NULL;
  71
  72   GBP_LEARN_DBG ("L2 EP: %U %U, %d",
  73                  format_mac_address_t, &gl2->mac,
  74                  format_ip46_address, &gl2->ip, IP46_TYPE_ANY, gl2->epg);
  75
  76   if (!ip46_address_is_zero (&gl2->ip))
  77     vec_add1 (ips, gl2->ip);
  78
  79   /*
  80    * flip the source and dst, since that's how it was received, this API
  81    * takes how it's sent
  82    */
  83   gbp_endpoint_update_and_lock (GBP_ENDPOINT_SRC_DP,
  84                                 gl2->sw_if_index, ips,
  85                                 &gl2->mac, INDEX_INVALID,
  86                                 INDEX_INVALID, gl2->epg,
  87                                 (GBP_ENDPOINT_FLAG_LEARNT |
  88                                  GBP_ENDPOINT_FLAG_REMOTE),
  89                                 &gl2->outer_dst, &gl2->outer_src, NULL);
  90   vec_free (ips);
  91 }
  92
  93 static void
  94 gbp_learn_l2_ip4_dp (const u8 * mac, const ip4_address_t * ip,
  95                      u32 bd_index, u32 sw_if_index, epg_id_t epg,
  96                      const ip4_address_t * outer_src,
  97                      const ip4_address_t * outer_dst)
  98 {
  99   gbp_learn_l2_t gl2 = {
 100     .sw_if_index = sw_if_index,
 101     .bd_index = bd_index,
 102     .epg = epg,
 103     .ip.ip4 = *ip,
 104     .outer_src.ip4 = *outer_src,
 105     .outer_dst.ip4 = *outer_dst,
 106   };
 107   mac_address_from_bytes (&gl2.mac, mac);
 108
 109   vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
 110 }
 111
 112 static void
 113 gbp_learn_l2_ip6_dp (const u8 * mac, const ip6_address_t * ip,
 114                      u32 bd_index, u32 sw_if_index, epg_id_t epg,
 115                      const ip4_address_t * outer_src,
 116                      const ip4_address_t * outer_dst)
 117 {
 118   gbp_learn_l2_t gl2 = {
 119     .sw_if_index = sw_if_index,
 120     .bd_index = bd_index,
 121     .epg = epg,
 122     .ip.ip6 = *ip,
 123     .outer_src.ip4 = *outer_src,
 124     .outer_dst.ip4 = *outer_dst,
 125   };
 126   mac_address_from_bytes (&gl2.mac, mac);
 127
 128   vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
 129 }
 130
 131 static void
 132 gbp_learn_l2_dp (const u8 * mac, u32 bd_index, u32 sw_if_index,
 133                  epg_id_t epg,
 134                  const ip4_address_t * outer_src,
 135                  const ip4_address_t * outer_dst)
 136 {
 137   gbp_learn_l2_t gl2 = {
 138     .sw_if_index = sw_if_index,
 139     .bd_index = bd_index,
 140     .epg = epg,
 141     .outer_src.ip4 = *outer_src,
 142     .outer_dst.ip4 = *outer_dst,
 143   };
 144   mac_address_from_bytes (&gl2.mac, mac);
 145
 146   vl_api_rpc_call_main_thread (gbp_learn_l2_cp, (u8 *) & gl2, sizeof (gl2));
 147 }
 148
 149 /**
 150  * per-packet trace data
 151  */
 152 typedef struct gbp_learn_l2_trace_t_
 153 {
 154   /* per-pkt trace data */
 155   mac_address_t mac;
 156   u32 sw_if_index;
 157   u32 new;
 158   u32 throttled;
 159   u32 epg;
 160   u32 d_bit;
 161   gbp_bridge_domain_flags_t gb_flags;
 162 } gbp_learn_l2_trace_t;
 163
 164 always_inline void
 165 gbp_learn_get_outer (const ethernet_header_t * eh0,
 166                      ip4_address_t * outer_src, ip4_address_t * outer_dst)
 167 {
 168   ip4_header_t *ip0;
 169   u8 *buff;
 170
 171   /* rewind back to the ivxlan header */
 172   buff = (u8 *) eh0;
 173   buff -= (sizeof (vxlan_gbp_header_t) +
 174            sizeof (udp_header_t) + sizeof (ip4_header_t));
 175
 176   ip0 = (ip4_header_t *) buff;
 177
 178   *outer_src = ip0->src_address;
 179   *outer_dst = ip0->dst_address;
 180 }
 181
 182 VLIB_NODE_FN (gbp_learn_l2_node) (vlib_main_t * vm,
 183                                   vlib_node_runtime_t * node,
 184                                   vlib_frame_t * frame)
 185 {
 186   u32 n_left_from, *from, *to_next, next_index, thread_index, seed;
 187   gbp_learn_main_t *glm;
 188   f64 time_now;
 189
 190   glm = &gbp_learn_main;
 191   next_index = 0;
 192   n_left_from = frame->n_vectors;
 193   from = vlib_frame_vector_args (frame);
 194   time_now = vlib_time_now (vm);
 195   thread_index = vm->thread_index;
 196
 197   seed = throttle_seed (&glm->gl_l2_throttle, thread_index, time_now);
 198
 199   while (n_left_from > 0)
 200     {
 201       u32 n_left_to_next;
 202
 203       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 204
 205       while (n_left_from > 0 && n_left_to_next > 0)
 206         {
 207           ip4_address_t outer_src, outer_dst;
 208           u32 bi0, sw_if_index0, t0, epg0;
 209           const ethernet_header_t *eh0;
 210           gbp_bridge_domain_t *gb0;
 211           gbp_learn_next_t next0;
 212           gbp_endpoint_t *ge0;
 213           vlib_buffer_t *b0;
 214
 215           next0 = GBP_LEARN_NEXT_DROP;
 216           bi0 = from[0];
 217           to_next[0] = bi0;
 218           from += 1;
 219           to_next += 1;
 220           n_left_from -= 1;
 221           n_left_to_next -= 1;
 222
 223           b0 = vlib_get_buffer (vm, bi0);
 224           sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 225
 226           eh0 = vlib_buffer_get_current (b0);
 227           epg0 = vnet_buffer2 (b0)->gbp.src_epg;
 228
 229           next0 = vnet_l2_feature_next (b0, glm->gl_l2_input_feat_next,
 230                                         L2INPUT_FEAT_GBP_LEARN);
 231
 232           ge0 = gbp_endpoint_find_mac (eh0->src_address,
 233                                        vnet_buffer (b0)->l2.bd_index);
 234           gb0 =
 235             gbp_bridge_domain_get_by_bd_index (vnet_buffer (b0)->l2.bd_index);
 236
 237           if ((vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D) ||
 238               (gb0->gb_flags & GBP_BD_FLAG_DO_NOT_LEARN))
 239             {
 240               t0 = 1;
 241               goto trace;
 242             }
 243
 244           /*
 245            * check for new EP or a moved EP
 246            */
 247           if (NULL == ge0 || ge0->ge_fwd.gef_itf != sw_if_index0)
 248
 249             {
 250               /*
 251                * use the last 4 bytes of the mac address as the hash for the EP
 252                */
 253               t0 = throttle_check (&glm->gl_l2_throttle, thread_index,
 254                                    *((u32 *) (eh0->src_address + 2)), seed);
 255               if (!t0)
 256                 {
 257                   gbp_learn_get_outer (eh0, &outer_src, &outer_dst);
 258
 259                   if (outer_src.as_u32 == 0 || outer_dst.as_u32 == 0)
 260                     {
 261                       t0 = 2;
 262                       goto trace;
 263                     }
 264
 265                   switch (clib_net_to_host_u16 (eh0->type))
 266                     {
 267                     case ETHERNET_TYPE_IP4:
 268                       {
 269                         const ip4_header_t *ip0;
 270
 271                         ip0 = (ip4_header_t *) (eh0 + 1);
 272
 273                         gbp_learn_l2_ip4_dp (eh0->src_address,
 274                                              &ip0->src_address,
 275                                              vnet_buffer (b0)->l2.bd_index,
 276                                              sw_if_index0, epg0,
 277                                              &outer_src, &outer_dst);
 278
 279                         break;
 280                       }
 281                     case ETHERNET_TYPE_IP6:
 282                       {
 283                         const ip6_header_t *ip0;
 284
 285                         ip0 = (ip6_header_t *) (eh0 + 1);
 286
 287                         gbp_learn_l2_ip6_dp (eh0->src_address,
 288                                              &ip0->src_address,
 289                                              vnet_buffer (b0)->l2.bd_index,
 290                                              sw_if_index0, epg0,
 291                                              &outer_src, &outer_dst);
 292
 293                         break;
 294                       }
 295                     case ETHERNET_TYPE_ARP:
 296                       {
 297                         const ethernet_arp_header_t *arp0;
 298
 299                         arp0 = (ethernet_arp_header_t *) (eh0 + 1);
 300
 301                         gbp_learn_l2_ip4_dp (eh0->src_address,
 302                                              &arp0->ip4_over_ethernet[0].ip4,
 303                                              vnet_buffer (b0)->l2.bd_index,
 304                                              sw_if_index0, epg0,
 305                                              &outer_src, &outer_dst);
 306                         break;
 307                       }
 308                     default:
 309                       gbp_learn_l2_dp (eh0->src_address,
 310                                        vnet_buffer (b0)->l2.bd_index,
 311                                        sw_if_index0, epg0,
 312                                        &outer_src, &outer_dst);
 313                       break;
 314                     }
 315                 }
 316             }
 317           else
 318             {
 319               /*
 320                * this update could happen simultaneoulsy from multiple workers
 321                * but that's ok we are not interested in being very accurate.
 322                */
 323               t0 = 0;
 324               ge0->ge_last_time = time_now;
 325             }
 326         trace:
 327           if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
 328             {
 329               gbp_learn_l2_trace_t *t =
 330                 vlib_add_trace (vm, node, b0, sizeof (*t));
 331               clib_memcpy_fast (t->mac.bytes, eh0->src_address, 6);
 332               t->new = (NULL == ge0);
 333               t->throttled = t0;
 334               t->sw_if_index = sw_if_index0;
 335               t->epg = epg0;
 336               t->gb_flags = gb0->gb_flags;
 337               t->d_bit = ! !(vnet_buffer2 (b0)->gbp.flags &
 338                              VXLAN_GBP_GPFLAGS_D);
 339             }
 340
 341           /* verify speculative enqueue, maybe switch current next frame */
 342           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 343                                            to_next, n_left_to_next,
 344                                            bi0, next0);
 345         }
 346
 347       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 348     }
 349
 350   return frame->n_vectors;
 351 }
 352
 353 /* packet trace format function */
 354 static u8 *
 355 format_gbp_learn_l2_trace (u8 * s, va_list * args)
 356 {
 357   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
 358   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
 359   gbp_learn_l2_trace_t *t = va_arg (*args, gbp_learn_l2_trace_t *);
 360
 361   s = format (s, "new:%d throttled:%d d-bit:%d mac:%U itf:%d epg:%d"
 362               " gb-flags:%U",
 363               t->new, t->throttled, t->d_bit,
 364               format_mac_address_t, &t->mac, t->sw_if_index, t->epg,
 365               format_gbp_bridge_domain_flags, t->gb_flags);
 366
 367   return s;
 368 }
 369
 370 /* *INDENT-OFF* */
 371 VLIB_REGISTER_NODE (gbp_learn_l2_node) = {
 372   .name = "gbp-learn-l2",
 373   .vector_size = sizeof (u32),
 374   .format_trace = format_gbp_learn_l2_trace,
 375   .type = VLIB_NODE_TYPE_INTERNAL,
 376
 377   .n_errors = ARRAY_LEN(gbp_learn_error_strings),
 378   .error_strings = gbp_learn_error_strings,
 379
 380   .n_next_nodes = GBP_LEARN_N_NEXT,
 381
 382   .next_nodes = {
 383     [GBP_LEARN_NEXT_DROP] = "error-drop",
 384   },
 385 };
 386 /* *INDENT-ON* */
 387
 388 typedef struct gbp_learn_l3_t_
 389 {
 390   ip46_address_t ip;
 391   u32 fib_index;
 392   u32 sw_if_index;
 393   epg_id_t epg;
 394   ip46_address_t outer_src;
 395   ip46_address_t outer_dst;
 396 } gbp_learn_l3_t;
 397
 398 static void
 399 gbp_learn_l3_cp (const gbp_learn_l3_t * gl3)
 400 {
 401   ip46_address_t *ips = NULL;
 402
 403   GBP_LEARN_DBG ("L3 EP: %U, %d", format_ip46_address, &gl3->ip,
 404                  IP46_TYPE_ANY, gl3->epg);
 405
 406   vec_add1 (ips, gl3->ip);
 407
 408   gbp_endpoint_update_and_lock (GBP_ENDPOINT_SRC_DP,
 409                                 gl3->sw_if_index, ips, NULL,
 410                                 INDEX_INVALID, INDEX_INVALID, gl3->epg,
 411                                 (GBP_ENDPOINT_FLAG_REMOTE |
 412                                  GBP_ENDPOINT_FLAG_LEARNT),
 413                                 &gl3->outer_dst, &gl3->outer_src, NULL);
 414   vec_free (ips);
 415 }
 416
 417 static void
 418 gbp_learn_ip4_dp (const ip4_address_t * ip,
 419                   u32 fib_index, u32 sw_if_index, epg_id_t epg,
 420                   const ip4_address_t * outer_src,
 421                   const ip4_address_t * outer_dst)
 422 {
 423   /* *INDENT-OFF* */
 424   gbp_learn_l3_t gl3 = {
 425     .ip = {
 426       .ip4 = *ip,
 427     },
 428     .sw_if_index = sw_if_index,
 429     .fib_index = fib_index,
 430     .epg = epg,
 431     .outer_src.ip4 = *outer_src,
 432     .outer_dst.ip4 = *outer_dst,
 433   };
 434   /* *INDENT-ON* */
 435
 436   vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
 437 }
 438
 439 static void
 440 gbp_learn_ip6_dp (const ip6_address_t * ip,
 441                   u32 fib_index, u32 sw_if_index, epg_id_t epg,
 442                   const ip4_address_t * outer_src,
 443                   const ip4_address_t * outer_dst)
 444 {
 445   /* *INDENT-OFF* */
 446   gbp_learn_l3_t gl3 = {
 447     .ip = {
 448       .ip6 = *ip,
 449     },
 450     .sw_if_index = sw_if_index,
 451     .fib_index = fib_index,
 452     .epg = epg,
 453     .outer_src.ip4 = *outer_src,
 454     .outer_dst.ip4 = *outer_dst,
 455   };
 456   /* *INDENT-ON* */
 457
 458   vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
 459 }
 460
 461 /**
 462  * per-packet trace data
 463  */
 464 typedef struct gbp_learn_l3_trace_t_
 465 {
 466   /* per-pkt trace data */
 467   ip46_address_t ip;
 468   u32 sw_if_index;
 469   u32 new;
 470   u32 throttled;
 471   u32 epg;
 472 } gbp_learn_l3_trace_t;
 473
 474 static uword
 475 gbp_learn_l3 (vlib_main_t * vm,
 476               vlib_node_runtime_t * node, vlib_frame_t * frame,
 477               fib_protocol_t fproto)
 478 {
 479   u32 n_left_from, *from, *to_next, next_index, thread_index, seed;
 480   gbp_learn_main_t *glm;
 481   f64 time_now;
 482
 483   glm = &gbp_learn_main;
 484   next_index = 0;
 485   n_left_from = frame->n_vectors;
 486   from = vlib_frame_vector_args (frame);
 487   time_now = vlib_time_now (vm);
 488   thread_index = vm->thread_index;
 489
 490   seed = throttle_seed (&glm->gl_l3_throttle, thread_index, time_now);
 491
 492   while (n_left_from > 0)
 493     {
 494       u32 n_left_to_next;
 495
 496       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 497
 498       while (n_left_from > 0 && n_left_to_next > 0)
 499         {
 500           u32 bi0, sw_if_index0, t0, epg0, fib_index0;
 501           CLIB_UNUSED (const ip4_header_t *) ip4_0;
 502           CLIB_UNUSED (const ip6_header_t *) ip6_0;
 503           ip4_address_t outer_src, outer_dst;
 504           ethernet_header_t *eth0;
 505           gbp_learn_next_t next0;
 506           gbp_endpoint_t *ge0;
 507           vlib_buffer_t *b0;
 508
 509           next0 = GBP_LEARN_NEXT_DROP;
 510           bi0 = from[0];
 511           to_next[0] = bi0;
 512           from += 1;
 513           to_next += 1;
 514           n_left_from -= 1;
 515           n_left_to_next -= 1;
 516
 517           b0 = vlib_get_buffer (vm, bi0);
 518           sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 519           epg0 = vnet_buffer2 (b0)->gbp.src_epg;
 520           ip6_0 = NULL;
 521           ip4_0 = NULL;
 522
 523           vnet_feature_next (&next0, b0);
 524
 525           if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D)
 526             {
 527               t0 = 1;
 528               ge0 = NULL;
 529               goto trace;
 530             }
 531
 532           fib_index0 = fib_table_get_index_for_sw_if_index (fproto,
 533                                                             sw_if_index0);
 534
 535           if (FIB_PROTOCOL_IP6 == fproto)
 536             {
 537               ip6_0 = vlib_buffer_get_current (b0);
 538               eth0 = (ethernet_header_t *) (((u8 *) ip6_0) - sizeof (*eth0));
 539
 540               gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
 541
 542               ge0 = gbp_endpoint_find_ip6 (&ip6_0->src_address, fib_index0);
 543
 544               if (NULL == ge0)
 545                 {
 546                   t0 = throttle_check (&glm->gl_l3_throttle,
 547                                        thread_index,
 548                                        ip6_address_hash_to_u32
 549                                        (&ip6_0->src_address), seed);
 550
 551                   if (!t0)
 552                     {
 553                       gbp_learn_ip6_dp (&ip6_0->src_address,
 554                                         fib_index0, sw_if_index0, epg0,
 555                                         &outer_src, &outer_dst);
 556                     }
 557                 }
 558               else
 559                 {
 560                   /*
 561                    * this update could happen simultaneoulsy from multiple
 562                    * workers but that's ok we are not interested in being
 563                    * very accurate.
 564                    */
 565                   t0 = 0;
 566                   ge0->ge_last_time = time_now;
 567                 }
 568             }
 569           else
 570             {
 571               ip4_0 = vlib_buffer_get_current (b0);
 572               eth0 = (ethernet_header_t *) (((u8 *) ip4_0) - sizeof (*eth0));
 573
 574               gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
 575               ge0 = gbp_endpoint_find_ip4 (&ip4_0->src_address, fib_index0);
 576
 577               if (NULL == ge0)
 578                 {
 579                   t0 = throttle_check (&glm->gl_l3_throttle, thread_index,
 580                                        ip4_0->src_address.as_u32, seed);
 581
 582                   if (!t0)
 583                     {
 584                       gbp_learn_ip4_dp (&ip4_0->src_address,
 585                                         fib_index0, sw_if_index0, epg0,
 586                                         &outer_src, &outer_dst);
 587                     }
 588                 }
 589               else
 590                 {
 591                   /*
 592                    * this update could happen simultaneoulsy from multiple
 593                    * workers but that's ok we are not interested in being
 594                    * very accurate.
 595                    */
 596                   t0 = 0;
 597                   ge0->ge_last_time = time_now;
 598                 }
 599             }
 600         trace:
 601           if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
 602             {
 603               gbp_learn_l3_trace_t *t;
 604
 605               t = vlib_add_trace (vm, node, b0, sizeof (*t));
 606               if (FIB_PROTOCOL_IP6 == fproto && ip6_0)
 607                 ip46_address_set_ip6 (&t->ip, &ip6_0->src_address);
 608               if (FIB_PROTOCOL_IP4 == fproto && ip4_0)
 609                 ip46_address_set_ip4 (&t->ip, &ip4_0->src_address);
 610               t->new = (NULL == ge0);
 611               t->throttled = t0;
 612               t->sw_if_index = sw_if_index0;
 613               t->epg = epg0;
 614             }
 615
 616           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 617                                            to_next, n_left_to_next,
 618                                            bi0, next0);
 619         }
 620
 621       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 622     }
 623
 624   return frame->n_vectors;
 625 }
 626
 627 /* packet trace format function */
 628 static u8 *
 629 format_gbp_learn_l3_trace (u8 * s, va_list * args)
 630 {
 631   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
 632   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
 633   gbp_learn_l3_trace_t *t = va_arg (*args, gbp_learn_l3_trace_t *);
 634
 635   s = format (s, "new:%d throttled:%d ip:%U itf:%d epg:%d",
 636               t->new, t->throttled,
 637               format_ip46_address, &t->ip, IP46_TYPE_ANY, t->sw_if_index,
 638               t->epg);
 639
 640   return s;
 641 }
 642
 643 VLIB_NODE_FN (gbp_learn_ip4_node) (vlib_main_t * vm,
 644                                    vlib_node_runtime_t * node,
 645                                    vlib_frame_t * frame)
 646 {
 647   return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP4));
 648 }
 649
 650 VLIB_NODE_FN (gbp_learn_ip6_node) (vlib_main_t * vm,
 651                                    vlib_node_runtime_t * node,
 652                                    vlib_frame_t * frame)
 653 {
 654   return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP6));
 655 }
 656
 657 /* *INDENT-OFF* */
 658 VLIB_REGISTER_NODE (gbp_learn_ip4_node) = {
 659   .name = "gbp-learn-ip4",
 660   .vector_size = sizeof (u32),
 661   .format_trace = format_gbp_learn_l3_trace,
 662   .type = VLIB_NODE_TYPE_INTERNAL,
 663 };
 664
 665 VNET_FEATURE_INIT (gbp_learn_ip4, static) =
 666 {
 667   .arc_name = "ip4-unicast",
 668   .node_name = "gbp-learn-ip4",
 669 };
 670
 671 VLIB_REGISTER_NODE (gbp_learn_ip6_node) = {
 672   .name = "gbp-learn-ip6",
 673   .vector_size = sizeof (u32),
 674   .format_trace = format_gbp_learn_l3_trace,
 675   .type = VLIB_NODE_TYPE_INTERNAL,
 676 };
 677
 678 VNET_FEATURE_INIT (gbp_learn_ip6, static) =
 679 {
 680   .arc_name = "ip6-unicast",
 681   .node_name = "gbp-learn-ip6",
 682 };
 683
 684 /* *INDENT-ON* */
 685
 686 /*
 687  * fd.io coding-style-patch-verification: ON
 688  *
 689  * Local Variables:
 690  * eval: (c-set-style "gnu")
 691  * End:
 692  */