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   sclass_t sclass;
  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->sclass);
  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->sclass,
  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, sclass_t sclass,
  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     .sclass = sclass,
 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, sclass_t sclass,
 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     .sclass = sclass,
 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                  sclass_t sclass,
 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     .sclass = sclass,
 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 sclass;
 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           const ethernet_header_t *eh0;
 209           u32 bi0, sw_if_index0, t0;
 210           gbp_bridge_domain_t *gb0;
 211           gbp_learn_next_t next0;
 212           gbp_endpoint_t *ge0;
 213           vlib_buffer_t *b0;
 214           sclass_t sclass0;
 215
 216           next0 = GBP_LEARN_NEXT_DROP;
 217           bi0 = from[0];
 218           to_next[0] = bi0;
 219           from += 1;
 220           to_next += 1;
 221           n_left_from -= 1;
 222           n_left_to_next -= 1;
 223
 224           b0 = vlib_get_buffer (vm, bi0);
 225           sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 226
 227           eh0 = vlib_buffer_get_current (b0);
 228           sclass0 = vnet_buffer2 (b0)->gbp.sclass;
 229
 230           next0 = vnet_l2_feature_next (b0, glm->gl_l2_input_feat_next,
 231                                         L2INPUT_FEAT_GBP_LEARN);
 232
 233           ge0 = gbp_endpoint_find_mac (eh0->src_address,
 234                                        vnet_buffer (b0)->l2.bd_index);
 235           gb0 =
 236             gbp_bridge_domain_get_by_bd_index (vnet_buffer (b0)->l2.bd_index);
 237
 238           if ((vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D) ||
 239               (gb0->gb_flags & GBP_BD_FLAG_DO_NOT_LEARN))
 240             {
 241               t0 = 1;
 242               goto trace;
 243             }
 244
 245           /*
 246            * check for new EP or a moved EP
 247            */
 248           if (NULL == ge0 || ge0->ge_fwd.gef_itf != sw_if_index0)
 249
 250             {
 251               /*
 252                * use the last 4 bytes of the mac address as the hash for the EP
 253                */
 254               t0 = throttle_check (&glm->gl_l2_throttle, thread_index,
 255                                    *((u32 *) (eh0->src_address + 2)), seed);
 256               if (!t0)
 257                 {
 258                   gbp_learn_get_outer (eh0, &outer_src, &outer_dst);
 259
 260                   if (outer_src.as_u32 == 0 || outer_dst.as_u32 == 0)
 261                     {
 262                       t0 = 2;
 263                       goto trace;
 264                     }
 265
 266                   switch (clib_net_to_host_u16 (eh0->type))
 267                     {
 268                     case ETHERNET_TYPE_IP4:
 269                       {
 270                         const ip4_header_t *ip0;
 271
 272                         ip0 = (ip4_header_t *) (eh0 + 1);
 273
 274                         gbp_learn_l2_ip4_dp (eh0->src_address,
 275                                              &ip0->src_address,
 276                                              vnet_buffer (b0)->l2.bd_index,
 277                                              sw_if_index0, sclass0,
 278                                              &outer_src, &outer_dst);
 279
 280                         break;
 281                       }
 282                     case ETHERNET_TYPE_IP6:
 283                       {
 284                         const ip6_header_t *ip0;
 285
 286                         ip0 = (ip6_header_t *) (eh0 + 1);
 287
 288                         gbp_learn_l2_ip6_dp (eh0->src_address,
 289                                              &ip0->src_address,
 290                                              vnet_buffer (b0)->l2.bd_index,
 291                                              sw_if_index0, sclass0,
 292                                              &outer_src, &outer_dst);
 293
 294                         break;
 295                       }
 296                     case ETHERNET_TYPE_ARP:
 297                       {
 298                         const ethernet_arp_header_t *arp0;
 299
 300                         arp0 = (ethernet_arp_header_t *) (eh0 + 1);
 301
 302                         gbp_learn_l2_ip4_dp (eh0->src_address,
 303                                              &arp0->ip4_over_ethernet[0].ip4,
 304                                              vnet_buffer (b0)->l2.bd_index,
 305                                              sw_if_index0, sclass0,
 306                                              &outer_src, &outer_dst);
 307                         break;
 308                       }
 309                     default:
 310                       gbp_learn_l2_dp (eh0->src_address,
 311                                        vnet_buffer (b0)->l2.bd_index,
 312                                        sw_if_index0, sclass0,
 313                                        &outer_src, &outer_dst);
 314                       break;
 315                     }
 316                 }
 317             }
 318           else
 319             {
 320               /*
 321                * this update could happen simultaneoulsy from multiple workers
 322                * but that's ok we are not interested in being very accurate.
 323                */
 324               t0 = 0;
 325               ge0->ge_last_time = time_now;
 326             }
 327         trace:
 328           if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
 329             {
 330               gbp_learn_l2_trace_t *t =
 331                 vlib_add_trace (vm, node, b0, sizeof (*t));
 332               clib_memcpy_fast (t->mac.bytes, eh0->src_address, 6);
 333               t->new = (NULL == ge0);
 334               t->throttled = t0;
 335               t->sw_if_index = sw_if_index0;
 336               t->sclass = sclass0;
 337               t->gb_flags = gb0->gb_flags;
 338               t->d_bit = ! !(vnet_buffer2 (b0)->gbp.flags &
 339                              VXLAN_GBP_GPFLAGS_D);
 340             }
 341
 342           /* verify speculative enqueue, maybe switch current next frame */
 343           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 344                                            to_next, n_left_to_next,
 345                                            bi0, next0);
 346         }
 347
 348       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 349     }
 350
 351   return frame->n_vectors;
 352 }
 353
 354 /* packet trace format function */
 355 static u8 *
 356 format_gbp_learn_l2_trace (u8 * s, va_list * args)
 357 {
 358   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
 359   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
 360   gbp_learn_l2_trace_t *t = va_arg (*args, gbp_learn_l2_trace_t *);
 361
 362   s = format (s, "new:%d throttled:%d d-bit:%d mac:%U itf:%d sclass:%d"
 363               " gb-flags:%U",
 364               t->new, t->throttled, t->d_bit,
 365               format_mac_address_t, &t->mac, t->sw_if_index, t->sclass,
 366               format_gbp_bridge_domain_flags, t->gb_flags);
 367
 368   return s;
 369 }
 370
 371 /* *INDENT-OFF* */
 372 VLIB_REGISTER_NODE (gbp_learn_l2_node) = {
 373   .name = "gbp-learn-l2",
 374   .vector_size = sizeof (u32),
 375   .format_trace = format_gbp_learn_l2_trace,
 376   .type = VLIB_NODE_TYPE_INTERNAL,
 377
 378   .n_errors = ARRAY_LEN(gbp_learn_error_strings),
 379   .error_strings = gbp_learn_error_strings,
 380
 381   .n_next_nodes = GBP_LEARN_N_NEXT,
 382
 383   .next_nodes = {
 384     [GBP_LEARN_NEXT_DROP] = "error-drop",
 385   },
 386 };
 387 /* *INDENT-ON* */
 388
 389 typedef struct gbp_learn_l3_t_
 390 {
 391   ip46_address_t ip;
 392   u32 fib_index;
 393   u32 sw_if_index;
 394   sclass_t sclass;
 395   ip46_address_t outer_src;
 396   ip46_address_t outer_dst;
 397 } gbp_learn_l3_t;
 398
 399 static void
 400 gbp_learn_l3_cp (const gbp_learn_l3_t * gl3)
 401 {
 402   ip46_address_t *ips = NULL;
 403
 404   GBP_LEARN_DBG ("L3 EP: %U, %d", format_ip46_address, &gl3->ip,
 405                  IP46_TYPE_ANY, gl3->sclass);
 406
 407   vec_add1 (ips, gl3->ip);
 408
 409   gbp_endpoint_update_and_lock (GBP_ENDPOINT_SRC_DP,
 410                                 gl3->sw_if_index, ips, NULL,
 411                                 INDEX_INVALID, INDEX_INVALID, gl3->sclass,
 412                                 (GBP_ENDPOINT_FLAG_REMOTE |
 413                                  GBP_ENDPOINT_FLAG_LEARNT),
 414                                 &gl3->outer_dst, &gl3->outer_src, NULL);
 415   vec_free (ips);
 416 }
 417
 418 static void
 419 gbp_learn_ip4_dp (const ip4_address_t * ip,
 420                   u32 fib_index, u32 sw_if_index, sclass_t sclass,
 421                   const ip4_address_t * outer_src,
 422                   const ip4_address_t * outer_dst)
 423 {
 424   /* *INDENT-OFF* */
 425   gbp_learn_l3_t gl3 = {
 426     .ip = {
 427       .ip4 = *ip,
 428     },
 429     .sw_if_index = sw_if_index,
 430     .fib_index = fib_index,
 431     .sclass = sclass,
 432     .outer_src.ip4 = *outer_src,
 433     .outer_dst.ip4 = *outer_dst,
 434   };
 435   /* *INDENT-ON* */
 436
 437   vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
 438 }
 439
 440 static void
 441 gbp_learn_ip6_dp (const ip6_address_t * ip,
 442                   u32 fib_index, u32 sw_if_index, sclass_t sclass,
 443                   const ip4_address_t * outer_src,
 444                   const ip4_address_t * outer_dst)
 445 {
 446   /* *INDENT-OFF* */
 447   gbp_learn_l3_t gl3 = {
 448     .ip = {
 449       .ip6 = *ip,
 450     },
 451     .sw_if_index = sw_if_index,
 452     .fib_index = fib_index,
 453     .sclass = sclass,
 454     .outer_src.ip4 = *outer_src,
 455     .outer_dst.ip4 = *outer_dst,
 456   };
 457   /* *INDENT-ON* */
 458
 459   vl_api_rpc_call_main_thread (gbp_learn_l3_cp, (u8 *) & gl3, sizeof (gl3));
 460 }
 461
 462 /**
 463  * per-packet trace data
 464  */
 465 typedef struct gbp_learn_l3_trace_t_
 466 {
 467   /* per-pkt trace data */
 468   ip46_address_t ip;
 469   u32 sw_if_index;
 470   u32 new;
 471   u32 throttled;
 472   u32 sclass;
 473 } gbp_learn_l3_trace_t;
 474
 475 static uword
 476 gbp_learn_l3 (vlib_main_t * vm,
 477               vlib_node_runtime_t * node, vlib_frame_t * frame,
 478               fib_protocol_t fproto)
 479 {
 480   u32 n_left_from, *from, *to_next, next_index, thread_index, seed;
 481   gbp_learn_main_t *glm;
 482   f64 time_now;
 483
 484   glm = &gbp_learn_main;
 485   next_index = 0;
 486   n_left_from = frame->n_vectors;
 487   from = vlib_frame_vector_args (frame);
 488   time_now = vlib_time_now (vm);
 489   thread_index = vm->thread_index;
 490
 491   seed = throttle_seed (&glm->gl_l3_throttle, thread_index, time_now);
 492
 493   while (n_left_from > 0)
 494     {
 495       u32 n_left_to_next;
 496
 497       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 498
 499       while (n_left_from > 0 && n_left_to_next > 0)
 500         {
 501           CLIB_UNUSED (const ip4_header_t *) ip4_0;
 502           CLIB_UNUSED (const ip6_header_t *) ip6_0;
 503           u32 bi0, sw_if_index0, t0, fib_index0;
 504           ip4_address_t outer_src, outer_dst;
 505           ethernet_header_t *eth0;
 506           gbp_learn_next_t next0;
 507           gbp_endpoint_t *ge0;
 508           vlib_buffer_t *b0;
 509           sclass_t sclass0;
 510
 511           next0 = GBP_LEARN_NEXT_DROP;
 512           bi0 = from[0];
 513           to_next[0] = bi0;
 514           from += 1;
 515           to_next += 1;
 516           n_left_from -= 1;
 517           n_left_to_next -= 1;
 518
 519           b0 = vlib_get_buffer (vm, bi0);
 520           sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 521           sclass0 = vnet_buffer2 (b0)->gbp.sclass;
 522           ip6_0 = NULL;
 523           ip4_0 = NULL;
 524
 525           vnet_feature_next (&next0, b0);
 526
 527           if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_D)
 528             {
 529               t0 = 1;
 530               ge0 = NULL;
 531               goto trace;
 532             }
 533
 534           fib_index0 = fib_table_get_index_for_sw_if_index (fproto,
 535                                                             sw_if_index0);
 536
 537           if (FIB_PROTOCOL_IP6 == fproto)
 538             {
 539               ip6_0 = vlib_buffer_get_current (b0);
 540               eth0 = (ethernet_header_t *) (((u8 *) ip6_0) - sizeof (*eth0));
 541
 542               gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
 543
 544               ge0 = gbp_endpoint_find_ip6 (&ip6_0->src_address, fib_index0);
 545
 546               if (NULL == ge0)
 547                 {
 548                   t0 = throttle_check (&glm->gl_l3_throttle,
 549                                        thread_index,
 550                                        ip6_address_hash_to_u32
 551                                        (&ip6_0->src_address), seed);
 552
 553                   if (!t0)
 554                     {
 555                       gbp_learn_ip6_dp (&ip6_0->src_address,
 556                                         fib_index0, sw_if_index0, sclass0,
 557                                         &outer_src, &outer_dst);
 558                     }
 559                 }
 560               else
 561                 {
 562                   /*
 563                    * this update could happen simultaneoulsy from multiple
 564                    * workers but that's ok we are not interested in being
 565                    * very accurate.
 566                    */
 567                   t0 = 0;
 568                   ge0->ge_last_time = time_now;
 569                 }
 570             }
 571           else
 572             {
 573               ip4_0 = vlib_buffer_get_current (b0);
 574               eth0 = (ethernet_header_t *) (((u8 *) ip4_0) - sizeof (*eth0));
 575
 576               gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
 577               ge0 = gbp_endpoint_find_ip4 (&ip4_0->src_address, fib_index0);
 578
 579               if (NULL == ge0)
 580                 {
 581                   t0 = throttle_check (&glm->gl_l3_throttle, thread_index,
 582                                        ip4_0->src_address.as_u32, seed);
 583
 584                   if (!t0)
 585                     {
 586                       gbp_learn_ip4_dp (&ip4_0->src_address,
 587                                         fib_index0, sw_if_index0, sclass0,
 588                                         &outer_src, &outer_dst);
 589                     }
 590                 }
 591               else
 592                 {
 593                   /*
 594                    * this update could happen simultaneoulsy from multiple
 595                    * workers but that's ok we are not interested in being
 596                    * very accurate.
 597                    */
 598                   t0 = 0;
 599                   ge0->ge_last_time = time_now;
 600                 }
 601             }
 602         trace:
 603           if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
 604             {
 605               gbp_learn_l3_trace_t *t;
 606
 607               t = vlib_add_trace (vm, node, b0, sizeof (*t));
 608               if (FIB_PROTOCOL_IP6 == fproto && ip6_0)
 609                 ip46_address_set_ip6 (&t->ip, &ip6_0->src_address);
 610               if (FIB_PROTOCOL_IP4 == fproto && ip4_0)
 611                 ip46_address_set_ip4 (&t->ip, &ip4_0->src_address);
 612               t->new = (NULL == ge0);
 613               t->throttled = t0;
 614               t->sw_if_index = sw_if_index0;
 615               t->sclass = sclass0;
 616             }
 617
 618           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 619                                            to_next, n_left_to_next,
 620                                            bi0, next0);
 621         }
 622
 623       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 624     }
 625
 626   return frame->n_vectors;
 627 }
 628
 629 /* packet trace format function */
 630 static u8 *
 631 format_gbp_learn_l3_trace (u8 * s, va_list * args)
 632 {
 633   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
 634   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
 635   gbp_learn_l3_trace_t *t = va_arg (*args, gbp_learn_l3_trace_t *);
 636
 637   s = format (s, "new:%d throttled:%d ip:%U itf:%d sclass:%d",
 638               t->new, t->throttled,
 639               format_ip46_address, &t->ip, IP46_TYPE_ANY, t->sw_if_index,
 640               t->sclass);
 641
 642   return s;
 643 }
 644
 645 VLIB_NODE_FN (gbp_learn_ip4_node) (vlib_main_t * vm,
 646                                    vlib_node_runtime_t * node,
 647                                    vlib_frame_t * frame)
 648 {
 649   return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP4));
 650 }
 651
 652 VLIB_NODE_FN (gbp_learn_ip6_node) (vlib_main_t * vm,
 653                                    vlib_node_runtime_t * node,
 654                                    vlib_frame_t * frame)
 655 {
 656   return (gbp_learn_l3 (vm, node, frame, FIB_PROTOCOL_IP6));
 657 }
 658
 659 /* *INDENT-OFF* */
 660 VLIB_REGISTER_NODE (gbp_learn_ip4_node) = {
 661   .name = "gbp-learn-ip4",
 662   .vector_size = sizeof (u32),
 663   .format_trace = format_gbp_learn_l3_trace,
 664   .type = VLIB_NODE_TYPE_INTERNAL,
 665 };
 666
 667 VNET_FEATURE_INIT (gbp_learn_ip4, static) =
 668 {
 669   .arc_name = "ip4-unicast",
 670   .node_name = "gbp-learn-ip4",
 671 };
 672
 673 VLIB_REGISTER_NODE (gbp_learn_ip6_node) = {
 674   .name = "gbp-learn-ip6",
 675   .vector_size = sizeof (u32),
 676   .format_trace = format_gbp_learn_l3_trace,
 677   .type = VLIB_NODE_TYPE_INTERNAL,
 678 };
 679
 680 VNET_FEATURE_INIT (gbp_learn_ip6, static) =
 681 {
 682   .arc_name = "ip6-unicast",
 683   .node_name = "gbp-learn-ip6",
 684 };
 685
 686 /* *INDENT-ON* */
 687
 688 /*
 689  * fd.io coding-style-patch-verification: ON
 690  *
 691  * Local Variables:
 692  * eval: (c-set-style "gnu")
 693  * End:
 694  */