src/vnet/fib/fib_api.c

   1 /*
   2  * Copyright (c) 2016 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 <vnet/vnet.h>
  17 #include <vlibmemory/api.h>
  18 #include <vnet/fib/fib_api.h>
  19 #include <vnet/ip/ip_types_api.h>
  20 #include <vnet/fib/fib_table.h>
  21 #include <vnet/mfib/mfib_table.h>
  22 #include <vnet/bier/bier_disp_table.h>
  23 #include <vpp/api/types.h>
  24
  25 #include <vnet/vnet_msg_enum.h>
  26
  27 #define vl_typedefs             /* define message structures */
  28 #include <vnet/vnet_all_api_h.h>
  29 #undef vl_typedefs
  30
  31 #define vl_endianfun            /* define message structures */
  32 #include <vnet/vnet_all_api_h.h>
  33 #undef vl_endianfun
  34
  35 /* instantiate all the print functions we know about */
  36 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
  37 #define vl_printfun
  38 #include <vnet/vnet_all_api_h.h>
  39 #undef vl_printfun
  40
  41 #include <vlibapi/api_helper_macros.h>
  42
  43 int
  44 fib_api_table_id_decode (fib_protocol_t fproto,
  45                          u32 table_id,
  46                          u32 *fib_index)
  47 {
  48     *fib_index = fib_table_find(fproto, table_id);
  49
  50     if (INDEX_INVALID == *fib_index)
  51     {
  52         return VNET_API_ERROR_NO_SUCH_FIB;
  53     }
  54
  55     return (0);
  56 }
  57
  58 int
  59 fib_api_mtable_id_decode (fib_protocol_t fproto,
  60                           u32 table_id,
  61                           u32 *fib_index)
  62 {
  63     *fib_index = mfib_table_find(fproto, table_id);
  64
  65     if (~0 == *fib_index)
  66     {
  67         return VNET_API_ERROR_NO_SUCH_FIB;
  68     }
  69
  70     return (0);
  71 }
  72
  73 static void
  74 fib_api_next_hop_decode (const vl_api_fib_path_t *in,
  75                          ip46_address_t *out)
  76 {
  77     if (in->proto == FIB_API_PATH_NH_PROTO_IP4)
  78         memcpy (&out->ip4, &in->nh.address.ip4, sizeof (out->ip4));
  79     else if (in->proto == FIB_API_PATH_NH_PROTO_IP6)
  80         memcpy (&out->ip6, &in->nh.address.ip6, sizeof (out->ip6));
  81 }
  82
  83 static vl_api_fib_path_nh_proto_t
  84 fib_api_path_dpo_proto_to_nh (dpo_proto_t dproto)
  85 {
  86     switch (dproto)
  87     {
  88     case DPO_PROTO_IP4:
  89         return (FIB_API_PATH_NH_PROTO_IP4);
  90     case DPO_PROTO_IP6:
  91         return (FIB_API_PATH_NH_PROTO_IP6);
  92     case DPO_PROTO_MPLS:
  93         return (FIB_API_PATH_NH_PROTO_MPLS);
  94     case DPO_PROTO_BIER:
  95         return (FIB_API_PATH_NH_PROTO_BIER);
  96     case DPO_PROTO_ETHERNET:
  97         return (FIB_API_PATH_NH_PROTO_ETHERNET);
  98     case DPO_PROTO_NSH:
  99         ASSERT(0);
 100         break;
 101     }
 102     return (FIB_API_PATH_NH_PROTO_IP4);
 103 }
 104
 105
 106 static void
 107 fib_api_next_hop_encode (const fib_route_path_t *rpath,
 108                          vl_api_fib_path_t *fp)
 109 {
 110     fp->proto = fib_api_path_dpo_proto_to_nh(rpath->frp_proto);
 111
 112     if (rpath->frp_proto == DPO_PROTO_IP4)
 113         memcpy (&fp->nh.address.ip4,
 114                 &rpath->frp_addr.ip4,
 115                 sizeof (rpath->frp_addr.ip4));
 116     else if (rpath->frp_proto == DPO_PROTO_IP6)
 117         memcpy (&fp->nh.address.ip6,
 118                 &rpath->frp_addr.ip6,
 119                 sizeof (rpath->frp_addr.ip6));
 120 }
 121
 122 static int
 123 fib_api_path_nh_proto_to_dpo (vl_api_fib_path_nh_proto_t pp,
 124                               dpo_proto_t *dproto)
 125 {
 126     switch (pp)
 127     {
 128     case FIB_API_PATH_NH_PROTO_IP4:
 129         *dproto = DPO_PROTO_IP4;
 130         break;
 131     case FIB_API_PATH_NH_PROTO_IP6:
 132         *dproto = DPO_PROTO_IP6;
 133         break;
 134     case FIB_API_PATH_NH_PROTO_MPLS:
 135         *dproto = DPO_PROTO_MPLS;
 136         break;
 137     case FIB_API_PATH_NH_PROTO_BIER:
 138         *dproto = DPO_PROTO_BIER;
 139         break;
 140     case FIB_API_PATH_NH_PROTO_ETHERNET:
 141         *dproto = DPO_PROTO_ETHERNET;
 142         break;
 143     default:
 144         return (-1);
 145     }
 146     return (0);
 147 }
 148
 149 int
 150 fib_api_path_decode (vl_api_fib_path_t *in,
 151                      fib_route_path_t *out)
 152 {
 153     vnet_classify_main_t *cm = &vnet_classify_main;
 154     int rv = 0, n_labels;
 155     vnet_main_t *vnm;
 156     u8 ii;
 157
 158     vnm = vnet_get_main ();
 159     clib_memset(&out->frp_dpo, 0, sizeof(out->frp_dpo));
 160
 161     /* enums are u32 */
 162     in->flags = ntohl (in->flags);
 163     in->type = ntohl (in->type);
 164     in->proto = ntohl (in->proto);
 165
 166     /*
 167      * attributes that apply to all path types
 168      */
 169     out->frp_flags = 0;
 170     out->frp_weight = in->weight;
 171     if (0 == out->frp_weight)
 172     {
 173         out->frp_weight = 1;
 174     }
 175     out->frp_preference = in->preference;
 176
 177     rv = fib_api_path_nh_proto_to_dpo(in->proto, &out->frp_proto);
 178
 179     if (0 != rv)
 180         return (rv);
 181
 182     /*
 183      * convert the flags and the AFI to determine the path type
 184      */
 185     if (in->flags & FIB_API_PATH_FLAG_RESOLVE_VIA_HOST)
 186         out->frp_flags |= FIB_ROUTE_PATH_RESOLVE_VIA_HOST;
 187     if (in->flags & FIB_API_PATH_FLAG_RESOLVE_VIA_ATTACHED)
 188         out->frp_flags |= FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED;
 189     if (in->flags & FIB_API_PATH_FLAG_POP_PW_CW)
 190         out->frp_flags |= FIB_ROUTE_PATH_POP_PW_CW;
 191
 192     switch (in->type)
 193     {
 194     case FIB_API_PATH_TYPE_DVR:
 195         out->frp_sw_if_index = ntohl(in->sw_if_index);
 196         out->frp_flags |= FIB_ROUTE_PATH_DVR;
 197         break;
 198     case FIB_API_PATH_TYPE_INTERFACE_RX:
 199         out->frp_sw_if_index = ntohl(in->sw_if_index);
 200         out->frp_flags |= FIB_ROUTE_PATH_INTF_RX;
 201         break;
 202     case FIB_API_PATH_TYPE_DROP:
 203         out->frp_flags |= FIB_ROUTE_PATH_DROP;
 204         break;
 205     case FIB_API_PATH_TYPE_LOCAL:
 206         out->frp_flags |= FIB_ROUTE_PATH_LOCAL;
 207         out->frp_sw_if_index = ntohl(in->sw_if_index);
 208         break;
 209     case FIB_API_PATH_TYPE_ICMP_UNREACH:
 210         out->frp_flags |= FIB_ROUTE_PATH_ICMP_UNREACH;
 211         break;
 212     case FIB_API_PATH_TYPE_ICMP_PROHIBIT:
 213         out->frp_flags |= FIB_ROUTE_PATH_ICMP_PROHIBIT;
 214         break;
 215     case FIB_API_PATH_TYPE_CLASSIFY:
 216         out->frp_flags |= FIB_ROUTE_PATH_CLASSIFY;
 217
 218         if (pool_is_free_index (cm->tables, ntohl (in->nh.classify_table_index)))
 219         {
 220             return VNET_API_ERROR_NO_SUCH_TABLE;
 221         }
 222         out->frp_classify_table_id = ntohl (in->nh.classify_table_index);
 223         break;
 224     case FIB_API_PATH_TYPE_UDP_ENCAP:
 225         out->frp_flags |= FIB_ROUTE_PATH_UDP_ENCAP;
 226         out->frp_udp_encap_id = ntohl(in->nh.obj_id);
 227         break;
 228     case FIB_API_PATH_TYPE_BIER_IMP:
 229         out->frp_flags |= FIB_ROUTE_PATH_BIER_IMP;
 230         out->frp_bier_imp = ntohl (in->nh.obj_id);
 231         break;
 232
 233     case FIB_API_PATH_TYPE_SOURCE_LOOKUP:
 234         out->frp_flags |= FIB_ROUTE_PATH_SOURCE_LOOKUP;
 235         /* fall through */
 236     case FIB_API_PATH_TYPE_NORMAL:
 237         switch (out->frp_proto)
 238         {
 239         case DPO_PROTO_IP4:
 240         case DPO_PROTO_IP6:
 241             fib_api_next_hop_decode(in, &out->frp_addr);
 242             out->frp_sw_if_index = ntohl(in->sw_if_index);
 243             out->frp_rpf_id = ntohl(in->rpf_id);
 244
 245             if (0 == out->frp_rpf_id)
 246             {
 247                 /* allow 0 to be an unset value on the API */
 248                 out->frp_rpf_id = ~0;
 249             }
 250
 251             if (~0 != out->frp_rpf_id)
 252             {
 253                 out->frp_flags |= FIB_ROUTE_PATH_RPF_ID;
 254             }
 255
 256             if (~0 == out->frp_sw_if_index)
 257             {
 258                 /* recursive or deag, validate the next-hop FIB */
 259                 if (~0 != out->frp_rpf_id)
 260                 {
 261                     rv = fib_api_mtable_id_decode(
 262                         dpo_proto_to_fib(out->frp_proto),
 263                         ntohl(in->table_id),
 264                         &out->frp_fib_index);
 265                 }
 266                 else
 267                 {
 268                     rv = fib_api_table_id_decode(
 269                         dpo_proto_to_fib(out->frp_proto),
 270                         ntohl(in->table_id),
 271                         &out->frp_fib_index);
 272                 }
 273                 if (0 != rv)
 274                 {
 275                     return (rv);
 276                 }
 277             }
 278             else
 279             {
 280                 if (pool_is_free_index (vnm->interface_main.sw_interfaces,
 281                                         out->frp_sw_if_index))
 282                 {
 283                     return VNET_API_ERROR_NO_MATCHING_INTERFACE;
 284                 }
 285             }
 286
 287             if (ip46_address_is_zero(&out->frp_addr))
 288             {
 289                 if (~0 == out->frp_sw_if_index &&
 290                     ~0 != out->frp_fib_index)
 291                 {
 292                     out->frp_flags |= FIB_ROUTE_PATH_DEAG;
 293                 }
 294             }
 295
 296             break;
 297         case DPO_PROTO_MPLS:
 298             out->frp_local_label = ntohl (in->nh.via_label);
 299             out->frp_eos = MPLS_NON_EOS;
 300             out->frp_sw_if_index = ~0;
 301             break;
 302         case DPO_PROTO_BIER:
 303             out->frp_sw_if_index = ntohl(in->sw_if_index);
 304             out->frp_rpf_id = ntohl(in->rpf_id);
 305
 306             if (!(out->frp_flags & FIB_ROUTE_PATH_BIER_IMP))
 307             {
 308                 fib_api_next_hop_decode(in, &out->frp_addr);
 309
 310                 if (ip46_address_is_zero(&out->frp_addr))
 311                 {
 312                     index_t bdti;
 313
 314                     bdti = bier_disp_table_find(ntohl(in->table_id));
 315
 316                     if (INDEX_INVALID != bdti)
 317                     {
 318                         out->frp_fib_index = bdti;
 319                     }
 320                     else
 321                     {
 322                         return (VNET_API_ERROR_NO_SUCH_FIB);
 323                     }
 324                 }
 325             }
 326             break;
 327         case DPO_PROTO_ETHERNET:
 328             out->frp_sw_if_index = ntohl(in->sw_if_index);
 329             break;
 330         case DPO_PROTO_NSH:
 331             break;
 332         }
 333     }
 334
 335     n_labels = in->n_labels;
 336     if (n_labels != 0)
 337     {
 338         vec_validate (out->frp_label_stack, n_labels - 1);
 339         for (ii = 0; ii < n_labels; ii++)
 340         {
 341             out->frp_label_stack[ii].fml_value =
 342                 ntohl(in->label_stack[ii].label);
 343             out->frp_label_stack[ii].fml_ttl =
 344                 in->label_stack[ii].ttl;
 345             out->frp_label_stack[ii].fml_exp =
 346                 in->label_stack[ii].exp;
 347             out->frp_label_stack[ii].fml_mode =
 348                 (in->label_stack[ii].is_uniform ?
 349                  FIB_MPLS_LSP_MODE_UNIFORM :
 350                  FIB_MPLS_LSP_MODE_PIPE);
 351         }
 352     }
 353
 354     return (0);
 355 }
 356
 357 void
 358 fib_api_path_encode (const fib_route_path_t * rpath,
 359                      vl_api_fib_path_t *out)
 360 {
 361     memset (out, 0, sizeof (*out));
 362
 363     out->weight = rpath->frp_weight;
 364     out->preference = rpath->frp_preference;
 365     out->sw_if_index = htonl (rpath->frp_sw_if_index);
 366     out->proto = fib_api_path_dpo_proto_to_nh(rpath->frp_proto);
 367     out->rpf_id = rpath->frp_rpf_id;
 368     fib_api_next_hop_encode (rpath, out);
 369
 370     if (0 != rpath->frp_fib_index)
 371     {
 372         if ((DPO_PROTO_IP6 == rpath->frp_proto) ||
 373             (DPO_PROTO_IP4 == rpath->frp_proto))
 374         {
 375             if (rpath->frp_flags & FIB_ROUTE_PATH_RPF_ID)
 376             {
 377                 out->table_id = htonl (mfib_table_get_table_id(
 378                                            rpath->frp_fib_index,
 379                                            dpo_proto_to_fib(rpath->frp_proto)));
 380             }
 381             else
 382             {
 383                 out->table_id = htonl (fib_table_get_table_id(
 384                                            rpath->frp_fib_index,
 385                                            dpo_proto_to_fib(rpath->frp_proto)));
 386             }
 387         }
 388     }
 389
 390     if (rpath->frp_flags & FIB_ROUTE_PATH_DVR)
 391     {
 392         out->type = FIB_API_PATH_TYPE_DVR;
 393     }
 394     else if (rpath->frp_flags & FIB_ROUTE_PATH_ICMP_UNREACH)
 395     {
 396         out->type = FIB_API_PATH_TYPE_ICMP_UNREACH;
 397     }
 398     else if (rpath->frp_flags & FIB_ROUTE_PATH_ICMP_PROHIBIT)
 399     {
 400         out->type = FIB_API_PATH_TYPE_ICMP_PROHIBIT;
 401     }
 402     else if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL)
 403     {
 404         out->type = FIB_API_PATH_TYPE_LOCAL;
 405     }
 406     else if (rpath->frp_flags & FIB_ROUTE_PATH_DROP)
 407     {
 408         out->type = FIB_API_PATH_TYPE_DROP;
 409     }
 410     else if (rpath->frp_flags & FIB_ROUTE_PATH_UDP_ENCAP)
 411     {
 412         out->type = FIB_API_PATH_TYPE_UDP_ENCAP;
 413         out->nh.obj_id = rpath->frp_udp_encap_id;
 414     }
 415     else if (rpath->frp_flags & FIB_ROUTE_PATH_BIER_IMP)
 416     {
 417         out->type = FIB_API_PATH_TYPE_BIER_IMP;
 418         out->nh.obj_id = rpath->frp_bier_imp;
 419     }
 420     else
 421     {
 422         out->type = FIB_API_PATH_TYPE_NORMAL;
 423     }
 424     if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_HOST)
 425     {
 426         out->flags |= FIB_API_PATH_FLAG_RESOLVE_VIA_HOST;
 427     }
 428     if (rpath->frp_flags & FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED)
 429     {
 430         out->flags |= FIB_API_PATH_FLAG_RESOLVE_VIA_ATTACHED;
 431     }
 432
 433     out->flags = htonl (out->flags);
 434     out->type = htonl (out->type);
 435     out->proto = htonl (out->proto);
 436
 437     if (rpath->frp_label_stack)
 438     {
 439         int ii;
 440
 441         for (ii = 0; ii < vec_len(rpath->frp_label_stack); ii++)
 442         {
 443             out->label_stack[ii].label =
 444                 htonl(rpath->frp_label_stack[ii].fml_value);
 445             out->label_stack[ii].ttl =
 446                 rpath->frp_label_stack[ii].fml_ttl;
 447             out->label_stack[ii].exp =
 448                 rpath->frp_label_stack[ii].fml_exp;
 449         }
 450         out->n_labels = ii;
 451     }
 452 }
 453
 454 int
 455 fib_api_route_add_del (u8 is_add,
 456                        u8 is_multipath,
 457                        u32 fib_index,
 458                        const fib_prefix_t * prefix,
 459                        fib_entry_flag_t entry_flags,
 460                        fib_route_path_t *rpaths)
 461 {
 462     if (is_multipath)
 463     {
 464         if (vec_len(rpaths) == 0)
 465             return (VNET_API_ERROR_NO_PATHS_IN_ROUTE);
 466
 467         /* Iterative path add/remove */
 468         if (is_add)
 469             fib_table_entry_path_add2 (fib_index,
 470                                        prefix,
 471                                        FIB_SOURCE_API,
 472                                        entry_flags,
 473                                        rpaths);
 474         else
 475             fib_table_entry_path_remove2 (fib_index,
 476                                           prefix,
 477                                           FIB_SOURCE_API,
 478                                           rpaths);
 479     }
 480     else
 481     {
 482         if (is_add)
 483         {
 484             if (vec_len(rpaths) == 0)
 485                 return (VNET_API_ERROR_NO_PATHS_IN_ROUTE);
 486
 487             /* path replacement */
 488             fib_table_entry_update (fib_index,
 489                                     prefix,
 490                                     FIB_SOURCE_API,
 491                                     entry_flags,
 492                                     rpaths);
 493         }
 494         else
 495             /* entry delete */
 496             fib_table_entry_delete (fib_index,
 497                                     prefix,
 498                                     FIB_SOURCE_API);
 499     }
 500
 501     return (0);
 502 }
 503
 504 u8*
 505 format_vl_api_fib_path (u8 * s, va_list * args)
 506 {
 507     const vl_api_fib_path_t *path = va_arg (*args, vl_api_fib_path_t*);
 508
 509     s = format (s, "sw_if_index %d", ntohl (path->sw_if_index));
 510     switch (clib_net_to_host_u32(path->proto))
 511     {
 512     case FIB_API_PATH_NH_PROTO_IP4:
 513         s = format (s, " %U", format_vl_api_address_union,
 514                     &path->nh.address, ADDRESS_IP4);
 515         break;
 516     case FIB_API_PATH_NH_PROTO_IP6:
 517         s = format (s, " %U", format_vl_api_address_union,
 518                     &path->nh.address, ADDRESS_IP6);
 519         break;
 520     default:
 521         break;
 522     }
 523     s = format (s, " weight %d", path->weight);
 524     s = format (s, " preference %d", path->preference);
 525     s = format (s, " type %d", ntohl(path->type));
 526     s = format (s, " proto %d", ntohl(path->proto));
 527     s = format (s, " flags %d", ntohl(path->flags));
 528     s = format (s, " n_labels %d", ntohl(path->n_labels));
 529     s = format (s, " table-id %d", ntohl(path->table_id));
 530     s = format (s, " rpf-id %d", ntohl(path->rpf_id));
 531
 532     return (s);
 533 }
 534
 535 fib_protocol_t
 536 fib_proto_from_api_address_family (int af)
 537 {
 538     switch (clib_net_to_host_u32 (af))
 539     {
 540     case ADDRESS_IP4:
 541         return (FIB_PROTOCOL_IP4);
 542     case ADDRESS_IP6:
 543         return (FIB_PROTOCOL_IP6);
 544     }
 545
 546     ASSERT(0);
 547     return (FIB_PROTOCOL_IP4);
 548 }
 549
 550 int
 551 fib_proto_to_api_address_family (fib_protocol_t fproto)
 552 {
 553     switch (fproto)
 554     {
 555     case FIB_PROTOCOL_IP4:
 556         return (clib_net_to_host_u32 (ADDRESS_IP4));
 557     case FIB_PROTOCOL_IP6:
 558         return (clib_net_to_host_u32 (ADDRESS_IP6));
 559     default:
 560         break;
 561     }
 562
 563     ASSERT(0);
 564     return (clib_net_to_host_u32 (ADDRESS_IP4));
 565 }