zebra/zebra_pw.c

   1 /* Zebra PW code
   2  * Copyright (C) 2016 Volta Networks, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; see the file COPYING; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  17  * MA 02110-1301 USA
  18  */
  19
  20 #include <zebra.h>
  21
  22 #include "log.h"
  23 #include "memory.h"
  24 #include "thread.h"
  25 #include "command.h"
  26 #include "vrf.h"
  27 #include "lib/json.h"
  28 #include "printfrr.h"
  29
  30 #include "zebra/debug.h"
  31 #include "zebra/rib.h"
  32 #include "zebra/zebra_router.h"
  33 #include "zebra/zapi_msg.h"
  34 #include "zebra/zebra_rnh.h"
  35 #include "zebra/zebra_vrf.h"
  36 #include "zebra/zebra_pw.h"
  37
  38 DEFINE_MTYPE_STATIC(LIB, PW, "Pseudowire");
  39
  40 DEFINE_QOBJ_TYPE(zebra_pw);
  41
  42 DEFINE_HOOK(pw_install, (struct zebra_pw * pw), (pw));
  43 DEFINE_HOOK(pw_uninstall, (struct zebra_pw * pw), (pw));
  44
  45 #define MPLS_NO_LABEL MPLS_INVALID_LABEL
  46
  47 static int zebra_pw_enabled(struct zebra_pw *);
  48 static void zebra_pw_install(struct zebra_pw *);
  49 static void zebra_pw_uninstall(struct zebra_pw *);
  50 static int zebra_pw_install_retry(struct thread *);
  51 static int zebra_pw_check_reachability(struct zebra_pw *);
  52 static void zebra_pw_update_status(struct zebra_pw *, int);
  53
  54 static inline int zebra_pw_compare(const struct zebra_pw *a,
  55                                    const struct zebra_pw *b)
  56 {
  57         return (strcmp(a->ifname, b->ifname));
  58 }
  59
  60 RB_GENERATE(zebra_pw_head, zebra_pw, pw_entry, zebra_pw_compare)
  61 RB_GENERATE(zebra_static_pw_head, zebra_pw, static_pw_entry, zebra_pw_compare)
  62
  63 struct zebra_pw *zebra_pw_add(struct zebra_vrf *zvrf, const char *ifname,
  64                               uint8_t protocol, struct zserv *client)
  65 {
  66         struct zebra_pw *pw;
  67
  68         if (IS_ZEBRA_DEBUG_PW)
  69                 zlog_debug("%u: adding pseudowire %s protocol %s",
  70                            zvrf_id(zvrf), ifname, zebra_route_string(protocol));
  71
  72         pw = XCALLOC(MTYPE_PW, sizeof(*pw));
  73         strlcpy(pw->ifname, ifname, sizeof(pw->ifname));
  74         pw->protocol = protocol;
  75         pw->vrf_id = zvrf_id(zvrf);
  76         pw->client = client;
  77         pw->status = PW_NOT_FORWARDING;
  78         pw->local_label = MPLS_NO_LABEL;
  79         pw->remote_label = MPLS_NO_LABEL;
  80         pw->flags = F_PSEUDOWIRE_CWORD;
  81
  82         RB_INSERT(zebra_pw_head, &zvrf->pseudowires, pw);
  83         if (pw->protocol == ZEBRA_ROUTE_STATIC) {
  84                 RB_INSERT(zebra_static_pw_head, &zvrf->static_pseudowires, pw);
  85                 QOBJ_REG(pw, zebra_pw);
  86         }
  87
  88         return pw;
  89 }
  90
  91 void zebra_pw_del(struct zebra_vrf *zvrf, struct zebra_pw *pw)
  92 {
  93         if (IS_ZEBRA_DEBUG_PW)
  94                 zlog_debug("%u: deleting pseudowire %s protocol %s", pw->vrf_id,
  95                            pw->ifname, zebra_route_string(pw->protocol));
  96
  97         /* remove nexthop tracking */
  98         zebra_deregister_rnh_pseudowire(pw->vrf_id, pw);
  99
 100         /* uninstall */
 101         if (pw->status == PW_FORWARDING) {
 102                 hook_call(pw_uninstall, pw);
 103                 dplane_pw_uninstall(pw);
 104         } else if (pw->install_retry_timer)
 105                 thread_cancel(&pw->install_retry_timer);
 106
 107         /* unlink and release memory */
 108         RB_REMOVE(zebra_pw_head, &zvrf->pseudowires, pw);
 109         if (pw->protocol == ZEBRA_ROUTE_STATIC)
 110                 RB_REMOVE(zebra_static_pw_head, &zvrf->static_pseudowires, pw);
 111         XFREE(MTYPE_PW, pw);
 112 }
 113
 114 void zebra_pw_change(struct zebra_pw *pw, ifindex_t ifindex, int type, int af,
 115                      union g_addr *nexthop, uint32_t local_label,
 116                      uint32_t remote_label, uint8_t flags,
 117                      union pw_protocol_fields *data)
 118 {
 119         pw->ifindex = ifindex;
 120         pw->type = type;
 121         pw->af = af;
 122         pw->nexthop = *nexthop;
 123         pw->local_label = local_label;
 124         pw->remote_label = remote_label;
 125         pw->flags = flags;
 126         pw->data = *data;
 127
 128         if (zebra_pw_enabled(pw)) {
 129                 bool nht_exists;
 130                 zebra_register_rnh_pseudowire(pw->vrf_id, pw, &nht_exists);
 131                 if (nht_exists)
 132                         zebra_pw_update(pw);
 133         } else {
 134                 if (pw->protocol == ZEBRA_ROUTE_STATIC)
 135                         zebra_deregister_rnh_pseudowire(pw->vrf_id, pw);
 136                 zebra_pw_uninstall(pw);
 137         }
 138 }
 139
 140 struct zebra_pw *zebra_pw_find(struct zebra_vrf *zvrf, const char *ifname)
 141 {
 142         struct zebra_pw pw;
 143         strlcpy(pw.ifname, ifname, sizeof(pw.ifname));
 144         return (RB_FIND(zebra_pw_head, &zvrf->pseudowires, &pw));
 145 }
 146
 147 static int zebra_pw_enabled(struct zebra_pw *pw)
 148 {
 149         if (pw->protocol == ZEBRA_ROUTE_STATIC) {
 150                 if (pw->local_label == MPLS_NO_LABEL
 151                     || pw->remote_label == MPLS_NO_LABEL || pw->af == AF_UNSPEC)
 152                         return 0;
 153                 return 1;
 154         } else
 155                 return pw->enabled;
 156 }
 157
 158 void zebra_pw_update(struct zebra_pw *pw)
 159 {
 160         if (zebra_pw_check_reachability(pw) < 0) {
 161                 zebra_pw_uninstall(pw);
 162                 zebra_pw_install_failure(pw, PW_NOT_FORWARDING);
 163                 /* wait for NHT and try again later */
 164         } else {
 165                 /*
 166                  * Install or reinstall the pseudowire (e.g. to update
 167                  * parameters like the nexthop or the use of the control word).
 168                  */
 169                 zebra_pw_install(pw);
 170         }
 171 }
 172
 173 static void zebra_pw_install(struct zebra_pw *pw)
 174 {
 175         if (IS_ZEBRA_DEBUG_PW)
 176                 zlog_debug("%u: installing pseudowire %s protocol %s",
 177                            pw->vrf_id, pw->ifname,
 178                            zebra_route_string(pw->protocol));
 179
 180         hook_call(pw_install, pw);
 181         if (dplane_pw_install(pw) == ZEBRA_DPLANE_REQUEST_FAILURE) {
 182                 zebra_pw_install_failure(pw, PW_NOT_FORWARDING);
 183                 return;
 184         }
 185
 186         if (pw->status != PW_FORWARDING)
 187                 zebra_pw_update_status(pw, PW_FORWARDING);
 188 }
 189
 190 static void zebra_pw_uninstall(struct zebra_pw *pw)
 191 {
 192         if (pw->status != PW_FORWARDING)
 193                 return;
 194
 195         if (IS_ZEBRA_DEBUG_PW)
 196                 zlog_debug("%u: uninstalling pseudowire %s protocol %s",
 197                            pw->vrf_id, pw->ifname,
 198                            zebra_route_string(pw->protocol));
 199
 200         /* ignore any possible error */
 201         hook_call(pw_uninstall, pw);
 202         dplane_pw_uninstall(pw);
 203
 204         if (zebra_pw_enabled(pw))
 205                 zebra_pw_update_status(pw, PW_NOT_FORWARDING);
 206 }
 207
 208 /*
 209  * Installation of the pseudowire in the kernel or hardware has failed. This
 210  * function will notify the pseudowire client about the failure and schedule
 211  * to retry the installation later. This function can be called by an external
 212  * agent that performs the pseudowire installation in an asynchronous way.
 213  */
 214 void zebra_pw_install_failure(struct zebra_pw *pw, int pwstatus)
 215 {
 216         if (IS_ZEBRA_DEBUG_PW)
 217                 zlog_debug(
 218                         "%u: failed installing pseudowire %s, scheduling retry in %u seconds",
 219                         pw->vrf_id, pw->ifname, PW_INSTALL_RETRY_INTERVAL);
 220
 221         /* schedule to retry later */
 222         thread_cancel(&pw->install_retry_timer);
 223         thread_add_timer(zrouter.master, zebra_pw_install_retry, pw,
 224                          PW_INSTALL_RETRY_INTERVAL, &pw->install_retry_timer);
 225
 226         zebra_pw_update_status(pw, pwstatus);
 227 }
 228
 229 static int zebra_pw_install_retry(struct thread *thread)
 230 {
 231         struct zebra_pw *pw = THREAD_ARG(thread);
 232
 233         pw->install_retry_timer = NULL;
 234         zebra_pw_install(pw);
 235
 236         return 0;
 237 }
 238
 239 static void zebra_pw_update_status(struct zebra_pw *pw, int status)
 240 {
 241         pw->status = status;
 242         if (pw->client)
 243                 zsend_pw_update(pw->client, pw);
 244 }
 245
 246 static int zebra_pw_check_reachability(struct zebra_pw *pw)
 247 {
 248         struct route_entry *re;
 249         struct nexthop *nexthop;
 250
 251         /* TODO: consider GRE/L2TPv3 tunnels in addition to MPLS LSPs */
 252
 253         /* find route to the remote end of the pseudowire */
 254         re = rib_match(family2afi(pw->af), SAFI_UNICAST, pw->vrf_id,
 255                        &pw->nexthop, NULL);
 256         if (!re) {
 257                 if (IS_ZEBRA_DEBUG_PW)
 258                         zlog_debug("%s: no route found for %s", __func__,
 259                                    pw->ifname);
 260                 return -1;
 261         }
 262
 263         /*
 264          * Need to ensure that there's a label binding for all nexthops.
 265          * Otherwise, ECMP for this route could render the pseudowire unusable.
 266          */
 267         for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) {
 268                 if (!nexthop->nh_label) {
 269                         if (IS_ZEBRA_DEBUG_PW)
 270                                 zlog_debug("%s: unlabeled route for %s",
 271                                            __func__, pw->ifname);
 272                         return -1;
 273                 }
 274         }
 275
 276         return 0;
 277 }
 278
 279 static int zebra_pw_client_close(struct zserv *client)
 280 {
 281         struct vrf *vrf;
 282         struct zebra_vrf *zvrf;
 283         struct zebra_pw *pw, *tmp;
 284
 285         RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
 286                 zvrf = vrf->info;
 287                 RB_FOREACH_SAFE (pw, zebra_pw_head, &zvrf->pseudowires, tmp) {
 288                         if (pw->client != client)
 289                                 continue;
 290                         zebra_pw_del(zvrf, pw);
 291                 }
 292         }
 293
 294         return 0;
 295 }
 296
 297 void zebra_pw_init(struct zebra_vrf *zvrf)
 298 {
 299         RB_INIT(zebra_pw_head, &zvrf->pseudowires);
 300         RB_INIT(zebra_static_pw_head, &zvrf->static_pseudowires);
 301
 302         hook_register(zserv_client_close, zebra_pw_client_close);
 303 }
 304
 305 void zebra_pw_exit(struct zebra_vrf *zvrf)
 306 {
 307         struct zebra_pw *pw;
 308
 309         while (!RB_EMPTY(zebra_pw_head, &zvrf->pseudowires)) {
 310                 pw = RB_ROOT(zebra_pw_head, &zvrf->pseudowires);
 311
 312                 zebra_pw_del(zvrf, pw);
 313         }
 314 }
 315
 316 DEFUN_NOSH (pseudowire_if,
 317             pseudowire_if_cmd,
 318             "pseudowire IFNAME",
 319             "Static pseudowire configuration\n"
 320             "Pseudowire name\n")
 321 {
 322         struct zebra_vrf *zvrf;
 323         struct zebra_pw *pw;
 324         const char *ifname;
 325         int idx = 0;
 326
 327         zvrf = vrf_info_lookup(VRF_DEFAULT);
 328         if (!zvrf)
 329                 return CMD_WARNING;
 330
 331         argv_find(argv, argc, "IFNAME", &idx);
 332         ifname = argv[idx]->arg;
 333
 334         pw = zebra_pw_find(zvrf, ifname);
 335         if (pw && pw->protocol != ZEBRA_ROUTE_STATIC) {
 336                 vty_out(vty, "%% Pseudowire is not static\n");
 337                 return CMD_WARNING;
 338         }
 339
 340         if (!pw)
 341                 pw = zebra_pw_add(zvrf, ifname, ZEBRA_ROUTE_STATIC, NULL);
 342         VTY_PUSH_CONTEXT(PW_NODE, pw);
 343
 344         return CMD_SUCCESS;
 345 }
 346
 347 DEFUN (no_pseudowire_if,
 348        no_pseudowire_if_cmd,
 349        "no pseudowire IFNAME",
 350        NO_STR
 351        "Static pseudowire configuration\n"
 352        "Pseudowire name\n")
 353 {
 354         struct zebra_vrf *zvrf;
 355         struct zebra_pw *pw;
 356         const char *ifname;
 357         int idx = 0;
 358
 359         zvrf = vrf_info_lookup(VRF_DEFAULT);
 360         if (!zvrf)
 361                 return CMD_WARNING;
 362
 363         argv_find(argv, argc, "IFNAME", &idx);
 364         ifname = argv[idx]->arg;
 365
 366         pw = zebra_pw_find(zvrf, ifname);
 367         if (pw) {
 368                 if (pw->protocol != ZEBRA_ROUTE_STATIC) {
 369                         vty_out(vty, "%% Pseudowire is not static\n");
 370                         return CMD_WARNING;
 371                 }
 372                 zebra_pw_del(zvrf, pw);
 373         }
 374
 375         return CMD_SUCCESS;
 376 }
 377
 378 DEFUN (pseudowire_labels,
 379        pseudowire_labels_cmd,
 380        "[no] mpls label local (16-1048575) remote (16-1048575)",
 381        NO_STR
 382        "MPLS L2VPN PW command\n"
 383        "MPLS L2VPN static labels\n"
 384        "Local pseudowire label\n"
 385        "Local pseudowire label\n"
 386        "Remote pseudowire label\n"
 387        "Remote pseudowire label\n")
 388 {
 389         VTY_DECLVAR_CONTEXT(zebra_pw, pw);
 390         int idx = 0;
 391         mpls_label_t local_label, remote_label;
 392
 393         if (argv_find(argv, argc, "no", &idx)) {
 394                 local_label = MPLS_NO_LABEL;
 395                 remote_label = MPLS_NO_LABEL;
 396         } else {
 397                 argv_find(argv, argc, "local", &idx);
 398                 local_label = atoi(argv[idx + 1]->arg);
 399                 argv_find(argv, argc, "remote", &idx);
 400                 remote_label = atoi(argv[idx + 1]->arg);
 401         }
 402
 403         zebra_pw_change(pw, pw->ifindex, pw->type, pw->af, &pw->nexthop,
 404                         local_label, remote_label, pw->flags, &pw->data);
 405
 406         return CMD_SUCCESS;
 407 }
 408
 409 DEFUN (pseudowire_neighbor,
 410        pseudowire_neighbor_cmd,
 411        "[no] neighbor <A.B.C.D|X:X::X:X>",
 412        NO_STR
 413        "Specify the IPv4 or IPv6 address of the remote endpoint\n"
 414        "IPv4 address\n"
 415        "IPv6 address\n")
 416 {
 417         VTY_DECLVAR_CONTEXT(zebra_pw, pw);
 418         int idx = 0;
 419         const char *address;
 420         int af;
 421         union g_addr nexthop;
 422
 423         af = AF_UNSPEC;
 424         memset(&nexthop, 0, sizeof(nexthop));
 425
 426         if (!argv_find(argv, argc, "no", &idx)) {
 427                 argv_find(argv, argc, "neighbor", &idx);
 428                 address = argv[idx + 1]->arg;
 429
 430                 if (inet_pton(AF_INET, address, &nexthop.ipv4) == 1)
 431                         af = AF_INET;
 432                 else if (inet_pton(AF_INET6, address, &nexthop.ipv6) == 1)
 433                         af = AF_INET6;
 434                 else {
 435                         vty_out(vty, "%% Malformed address\n");
 436                         return CMD_WARNING;
 437                 }
 438         }
 439
 440         zebra_pw_change(pw, pw->ifindex, pw->type, af, &nexthop,
 441                         pw->local_label, pw->remote_label, pw->flags,
 442                         &pw->data);
 443
 444         return CMD_SUCCESS;
 445 }
 446
 447 DEFUN (pseudowire_control_word,
 448        pseudowire_control_word_cmd,
 449        "[no] control-word <exclude|include>",
 450        NO_STR
 451        "Control-word options\n"
 452        "Exclude control-word in pseudowire packets\n"
 453        "Include control-word in pseudowire packets\n")
 454 {
 455         VTY_DECLVAR_CONTEXT(zebra_pw, pw);
 456         int idx = 0;
 457         uint8_t flags = 0;
 458
 459         if (argv_find(argv, argc, "no", &idx))
 460                 flags = F_PSEUDOWIRE_CWORD;
 461         else {
 462                 argv_find(argv, argc, "control-word", &idx);
 463                 if (argv[idx + 1]->text[0] == 'i')
 464                         flags = F_PSEUDOWIRE_CWORD;
 465         }
 466
 467         zebra_pw_change(pw, pw->ifindex, pw->type, pw->af, &pw->nexthop,
 468                         pw->local_label, pw->remote_label, flags, &pw->data);
 469
 470         return CMD_SUCCESS;
 471 }
 472
 473 DEFUN (show_pseudowires,
 474        show_pseudowires_cmd,
 475        "show mpls pseudowires",
 476        SHOW_STR
 477        MPLS_STR
 478        "Pseudowires\n")
 479 {
 480         struct zebra_vrf *zvrf;
 481         struct zebra_pw *pw;
 482
 483         zvrf = vrf_info_lookup(VRF_DEFAULT);
 484         if (!zvrf)
 485                 return 0;
 486
 487         vty_out(vty, "%-16s %-24s %-12s %-8s %-10s\n", "Interface", "Neighbor",
 488                 "Labels", "Protocol", "Status");
 489
 490         RB_FOREACH (pw, zebra_pw_head, &zvrf->pseudowires) {
 491                 char buf_nbr[INET6_ADDRSTRLEN];
 492                 char buf_labels[64];
 493
 494                 inet_ntop(pw->af, &pw->nexthop, buf_nbr, sizeof(buf_nbr));
 495
 496                 if (pw->local_label != MPLS_NO_LABEL
 497                     && pw->remote_label != MPLS_NO_LABEL)
 498                         snprintf(buf_labels, sizeof(buf_labels), "%u/%u",
 499                                  pw->local_label, pw->remote_label);
 500                 else
 501                         snprintf(buf_labels, sizeof(buf_labels), "-");
 502
 503                 vty_out(vty, "%-16s %-24s %-12s %-8s %-10s\n", pw->ifname,
 504                         (pw->af != AF_UNSPEC) ? buf_nbr : "-", buf_labels,
 505                         zebra_route_string(pw->protocol),
 506                         (zebra_pw_enabled(pw) && pw->status == PW_FORWARDING)
 507                                 ? "UP"
 508                                 : "DOWN");
 509         }
 510
 511         return CMD_SUCCESS;
 512 }
 513
 514 static void vty_show_mpls_pseudowire_detail(struct vty *vty)
 515 {
 516         struct zebra_vrf *zvrf;
 517         struct zebra_pw *pw;
 518         struct route_entry *re;
 519         struct nexthop *nexthop;
 520         struct nexthop_group *nhg;
 521
 522         zvrf = vrf_info_lookup(VRF_DEFAULT);
 523         if (!zvrf)
 524                 return;
 525
 526         RB_FOREACH (pw, zebra_pw_head, &zvrf->pseudowires) {
 527                 char buf_nbr[INET6_ADDRSTRLEN];
 528                 char buf_nh[100];
 529
 530                 vty_out(vty, "Interface: %s\n", pw->ifname);
 531                 inet_ntop(pw->af, &pw->nexthop, buf_nbr, sizeof(buf_nbr));
 532                 vty_out(vty, "  Neighbor: %s\n",
 533                         (pw->af != AF_UNSPEC) ? buf_nbr : "-");
 534                 if (pw->local_label != MPLS_NO_LABEL)
 535                         vty_out(vty, "  Local Label: %u\n", pw->local_label);
 536                 else
 537                         vty_out(vty, "  Local Label: %s\n", "-");
 538                 if (pw->remote_label != MPLS_NO_LABEL)
 539                         vty_out(vty, "  Remote Label: %u\n", pw->remote_label);
 540                 else
 541                         vty_out(vty, "  Remote Label: %s\n", "-");
 542                 vty_out(vty, "  Protocol: %s\n",
 543                         zebra_route_string(pw->protocol));
 544                 if (pw->protocol == ZEBRA_ROUTE_LDP)
 545                         vty_out(vty, "  VC-ID: %u\n", pw->data.ldp.pwid);
 546                 vty_out(vty, "  Status: %s \n",
 547                         (zebra_pw_enabled(pw) && pw->status == PW_FORWARDING)
 548                         ? "Up"
 549                         : "Down");
 550                 re = rib_match(family2afi(pw->af), SAFI_UNICAST, pw->vrf_id,
 551                                &pw->nexthop, NULL);
 552                 if (re == NULL)
 553                         continue;
 554
 555                 nhg = rib_get_fib_nhg(re);
 556                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 557                         snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv",
 558                                    nexthop);
 559                         vty_out(vty, "  Next Hop: %s\n", buf_nh);
 560                         if (nexthop->nh_label)
 561                                 vty_out(vty, "  Next Hop label: %u\n",
 562                                         nexthop->nh_label->label[0]);
 563                         else
 564                                 vty_out(vty, "  Next Hop label: %s\n",
 565                                         "-");
 566                 }
 567
 568                 /* Include any installed backups */
 569                 nhg = rib_get_fib_backup_nhg(re);
 570                 if (nhg == NULL)
 571                         continue;
 572
 573                 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 574                         snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv",
 575                                    nexthop);
 576                         vty_out(vty, "  Next Hop: %s\n", buf_nh);
 577                         if (nexthop->nh_label)
 578                                 vty_out(vty, "  Next Hop label: %u\n",
 579                                         nexthop->nh_label->label[0]);
 580                         else
 581                                 vty_out(vty, "  Next Hop label: %s\n",
 582                                         "-");
 583                 }
 584         }
 585 }
 586
 587 static void vty_show_mpls_pseudowire(struct zebra_pw *pw, json_object *json_pws)
 588 {
 589         struct route_entry *re;
 590         struct nexthop *nexthop;
 591         struct nexthop_group *nhg;
 592         char buf_nbr[INET6_ADDRSTRLEN];
 593         char buf_nh[100];
 594         json_object *json_pw = NULL;
 595         json_object *json_nexthop = NULL;
 596         json_object *json_nexthops = NULL;
 597
 598         json_nexthops = json_object_new_array();
 599         json_pw = json_object_new_object();
 600
 601         json_object_string_add(json_pw, "interface", pw->ifname);
 602         if (pw->af == AF_UNSPEC)
 603                 json_object_string_add(json_pw, "neighbor", "-");
 604         else {
 605                 inet_ntop(pw->af, &pw->nexthop, buf_nbr, sizeof(buf_nbr));
 606                 json_object_string_add(json_pw, "neighbor", buf_nbr);
 607         }
 608         if (pw->local_label != MPLS_NO_LABEL)
 609                 json_object_int_add(json_pw, "localLabel", pw->local_label);
 610         else
 611                 json_object_string_add(json_pw, "localLabel", "-");
 612         if (pw->remote_label != MPLS_NO_LABEL)
 613                 json_object_int_add(json_pw, "remoteLabel", pw->remote_label);
 614         else
 615                 json_object_string_add(json_pw, "remoteLabel", "-");
 616         json_object_string_add(json_pw, "protocol",
 617                                zebra_route_string(pw->protocol));
 618         if (pw->protocol == ZEBRA_ROUTE_LDP)
 619                 json_object_int_add(json_pw, "vcId", pw->data.ldp.pwid);
 620         json_object_string_add(
 621                 json_pw, "Status",
 622                 (zebra_pw_enabled(pw) && pw->status == PW_FORWARDING) ? "Up"
 623                                                                       : "Down");
 624         re = rib_match(family2afi(pw->af), SAFI_UNICAST, pw->vrf_id,
 625                        &pw->nexthop, NULL);
 626         if (re == NULL)
 627                 goto done;
 628
 629         nhg = rib_get_fib_nhg(re);
 630         for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 631                 json_nexthop = json_object_new_object();
 632                 snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv", nexthop);
 633                 json_object_string_add(json_nexthop, "nexthop", buf_nh);
 634                 if (nexthop->nh_label)
 635                         json_object_int_add(
 636                                 json_nexthop, "nhLabel",
 637                                 nexthop->nh_label->label[0]);
 638                 else
 639                         json_object_string_add(json_nexthop, "nhLabel",
 640                                                "-");
 641
 642                 json_object_array_add(json_nexthops, json_nexthop);
 643         }
 644
 645         /* Include installed backup nexthops also */
 646         nhg = rib_get_fib_backup_nhg(re);
 647         if (nhg == NULL)
 648                 goto done;
 649
 650         for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
 651                 json_nexthop = json_object_new_object();
 652                 snprintfrr(buf_nh, sizeof(buf_nh), "%pNHv", nexthop);
 653                 json_object_string_add(json_nexthop, "nexthop", buf_nh);
 654                 if (nexthop->nh_label)
 655                         json_object_int_add(
 656                                 json_nexthop, "nhLabel",
 657                                 nexthop->nh_label->label[0]);
 658                 else
 659                         json_object_string_add(json_nexthop, "nhLabel",
 660                                                "-");
 661
 662                 json_object_array_add(json_nexthops, json_nexthop);
 663         }
 664
 665 done:
 666
 667         json_object_object_add(json_pw, "nexthops", json_nexthops);
 668         json_object_array_add(json_pws, json_pw);
 669 }
 670
 671 static void vty_show_mpls_pseudowire_detail_json(struct vty *vty)
 672 {
 673         json_object *json = NULL;
 674         json_object *json_pws = NULL;
 675         struct zebra_vrf *zvrf;
 676         struct zebra_pw *pw;
 677
 678         zvrf = vrf_info_lookup(VRF_DEFAULT);
 679         if (!zvrf)
 680                 return;
 681
 682         json = json_object_new_object();
 683         json_pws = json_object_new_array();
 684         RB_FOREACH (pw, zebra_pw_head, &zvrf->pseudowires) {
 685                 vty_show_mpls_pseudowire(pw, json_pws);
 686         }
 687         json_object_object_add(json, "pw", json_pws);
 688         vty_out(vty, "%s\n",
 689                 json_object_to_json_string_ext(json, JSON_C_TO_STRING_PRETTY));
 690         json_object_free(json);
 691 }
 692
 693 DEFUN(show_pseudowires_detail, show_pseudowires_detail_cmd,
 694       "show mpls pseudowires detail [json]$json",
 695       SHOW_STR MPLS_STR
 696       "Pseudowires\n"
 697       "Detailed output\n" JSON_STR)
 698 {
 699         bool uj = use_json(argc, argv);
 700
 701         if (uj)
 702                 vty_show_mpls_pseudowire_detail_json(vty);
 703         else
 704                 vty_show_mpls_pseudowire_detail(vty);
 705
 706         return CMD_SUCCESS;
 707 }
 708
 709 /* Pseudowire configuration write function. */
 710 static int zebra_pw_config(struct vty *vty)
 711 {
 712         int write = 0;
 713         struct zebra_vrf *zvrf;
 714         struct zebra_pw *pw;
 715
 716         zvrf = vrf_info_lookup(VRF_DEFAULT);
 717         if (!zvrf)
 718                 return 0;
 719
 720         RB_FOREACH (pw, zebra_static_pw_head, &zvrf->static_pseudowires) {
 721                 vty_out(vty, "pseudowire %s\n", pw->ifname);
 722                 if (pw->local_label != MPLS_NO_LABEL
 723                     && pw->remote_label != MPLS_NO_LABEL)
 724                         vty_out(vty, " mpls label local %u remote %u\n",
 725                                 pw->local_label, pw->remote_label);
 726                 else
 727                         vty_out(vty,
 728                                 " ! Incomplete config, specify the static MPLS labels\n");
 729
 730                 if (pw->af != AF_UNSPEC) {
 731                         char buf[INET6_ADDRSTRLEN];
 732                         inet_ntop(pw->af, &pw->nexthop, buf, sizeof(buf));
 733                         vty_out(vty, " neighbor %s\n", buf);
 734                 } else
 735                         vty_out(vty,
 736                                 " ! Incomplete config, specify a neighbor address\n");
 737
 738                 if (!(pw->flags & F_PSEUDOWIRE_CWORD))
 739                         vty_out(vty, " control-word exclude\n");
 740
 741                 vty_out(vty, "!\n");
 742                 write = 1;
 743         }
 744
 745         return write;
 746 }
 747
 748 static int zebra_pw_config(struct vty *vty);
 749 static struct cmd_node pw_node = {
 750         .name = "pw",
 751         .node = PW_NODE,
 752         .parent_node = CONFIG_NODE,
 753         .prompt = "%s(config-pw)# ",
 754         .config_write = zebra_pw_config,
 755 };
 756
 757 void zebra_pw_vty_init(void)
 758 {
 759         install_node(&pw_node);
 760         install_default(PW_NODE);
 761
 762         install_element(CONFIG_NODE, &pseudowire_if_cmd);
 763         install_element(CONFIG_NODE, &no_pseudowire_if_cmd);
 764         install_element(PW_NODE, &pseudowire_labels_cmd);
 765         install_element(PW_NODE, &pseudowire_neighbor_cmd);
 766         install_element(PW_NODE, &pseudowire_control_word_cmd);
 767
 768         install_element(VIEW_NODE, &show_pseudowires_cmd);
 769         install_element(VIEW_NODE, &show_pseudowires_detail_cmd);
 770 }