sharpd/sharp_zebra.c

   1 /*
   2  * Zebra connect code.
   3  * Copyright (C) Cumulus Networks, Inc.
   4  *               Donald Sharp
   5  *
   6  * This file is part of FRR.
   7  *
   8  * FRR is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * FRR is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; see the file COPYING; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22 #include <zebra.h>
  23
  24 #include "thread.h"
  25 #include "command.h"
  26 #include "network.h"
  27 #include "prefix.h"
  28 #include "stream.h"
  29 #include "memory.h"
  30 #include "zclient.h"
  31 #include "nexthop.h"
  32 #include "nexthop_group.h"
  33 #include "link_state.h"
  34
  35 #include "sharp_globals.h"
  36 #include "sharp_nht.h"
  37 #include "sharp_zebra.h"
  38
  39 /* Zebra structure to hold current status. */
  40 struct zclient *zclient = NULL;
  41
  42 /* For registering threads. */
  43 extern struct thread_master *master;
  44
  45 /* Privs info */
  46 extern struct zebra_privs_t sharp_privs;
  47
  48 DEFINE_MTYPE_STATIC(SHARPD, ZC, "Test zclients");
  49
  50 /* Struct to hold list of test zclients */
  51 struct sharp_zclient {
  52         struct sharp_zclient *prev;
  53         struct sharp_zclient *next;
  54         struct zclient *client;
  55 };
  56
  57 /* Head of test zclient list */
  58 static struct sharp_zclient *sharp_clients_head;
  59
  60 static int sharp_opaque_handler(ZAPI_CALLBACK_ARGS);
  61
  62 /* Utility to add a test zclient struct to the list */
  63 static void add_zclient(struct zclient *client)
  64 {
  65         struct sharp_zclient *node;
  66
  67         node = XCALLOC(MTYPE_ZC, sizeof(struct sharp_zclient));
  68
  69         node->client = client;
  70
  71         node->next = sharp_clients_head;
  72         if (sharp_clients_head)
  73                 sharp_clients_head->prev = node;
  74         sharp_clients_head = node;
  75 }
  76
  77 /* Interface addition message from zebra. */
  78 static int sharp_ifp_create(struct interface *ifp)
  79 {
  80         return 0;
  81 }
  82
  83 static int sharp_ifp_destroy(struct interface *ifp)
  84 {
  85         return 0;
  86 }
  87
  88 static int interface_address_add(ZAPI_CALLBACK_ARGS)
  89 {
  90         zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
  91
  92         return 0;
  93 }
  94
  95 static int interface_address_delete(ZAPI_CALLBACK_ARGS)
  96 {
  97         struct connected *c;
  98
  99         c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
 100
 101         if (!c)
 102                 return 0;
 103
 104         connected_free(&c);
 105         return 0;
 106 }
 107
 108 static int sharp_ifp_up(struct interface *ifp)
 109 {
 110         return 0;
 111 }
 112
 113 static int sharp_ifp_down(struct interface *ifp)
 114 {
 115         return 0;
 116 }
 117
 118 int sharp_install_lsps_helper(bool install_p, bool update_p,
 119                               const struct prefix *p, uint8_t type,
 120                               int instance, uint32_t in_label,
 121                               const struct nexthop_group *nhg,
 122                               const struct nexthop_group *backup_nhg)
 123 {
 124         struct zapi_labels zl = {};
 125         struct zapi_nexthop *znh;
 126         const struct nexthop *nh;
 127         int i, cmd, ret;
 128
 129         zl.type = ZEBRA_LSP_SHARP;
 130         zl.local_label = in_label;
 131
 132         if (p) {
 133                 SET_FLAG(zl.message, ZAPI_LABELS_FTN);
 134                 prefix_copy(&zl.route.prefix, p);
 135                 zl.route.type = type;
 136                 zl.route.instance = instance;
 137         }
 138
 139         /* List of nexthops is optional for delete */
 140         i = 0;
 141         if (nhg) {
 142                 for (ALL_NEXTHOPS_PTR(nhg, nh)) {
 143                         znh = &zl.nexthops[i];
 144
 145                         /* Must have labels to be useful */
 146                         if (nh->nh_label == NULL ||
 147                             nh->nh_label->num_labels == 0)
 148                                 continue;
 149
 150                         if (nh->type == NEXTHOP_TYPE_IFINDEX ||
 151                             nh->type == NEXTHOP_TYPE_BLACKHOLE)
 152                                 /* Hmm - can't really deal with these types */
 153                                 continue;
 154
 155                         ret = zapi_nexthop_from_nexthop(znh, nh);
 156                         if (ret < 0)
 157                                 return -1;
 158
 159                         i++;
 160                         if (i >= MULTIPATH_NUM)
 161                                 break;
 162                 }
 163         }
 164
 165         /* Whoops - no nexthops isn't very useful for install */
 166         if (i == 0 && install_p)
 167                 return -1;
 168
 169         zl.nexthop_num = i;
 170
 171         /* Add optional backup nexthop info. Since these are used by index,
 172          * we can't just skip over an invalid backup nexthop: we will
 173          * invalidate the entire operation.
 174          */
 175         if (backup_nhg != NULL) {
 176                 i = 0;
 177                 for (ALL_NEXTHOPS_PTR(backup_nhg, nh)) {
 178                         znh = &zl.backup_nexthops[i];
 179
 180                         /* Must have labels to be useful */
 181                         if (nh->nh_label == NULL ||
 182                             nh->nh_label->num_labels == 0)
 183                                 return -1;
 184
 185                         if (nh->type == NEXTHOP_TYPE_IFINDEX ||
 186                             nh->type == NEXTHOP_TYPE_BLACKHOLE)
 187                                 /* Hmm - can't really deal with these types */
 188                                 return -1;
 189
 190                         ret = zapi_nexthop_from_nexthop(znh, nh);
 191                         if (ret < 0)
 192                                 return -1;
 193
 194                         i++;
 195                         if (i >= MULTIPATH_NUM)
 196                                 break;
 197                 }
 198
 199                 if (i > 0)
 200                         SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS);
 201
 202                 zl.backup_nexthop_num = i;
 203         }
 204
 205
 206         if (install_p) {
 207                 if (update_p)
 208                         cmd = ZEBRA_MPLS_LABELS_REPLACE;
 209                 else
 210                         cmd = ZEBRA_MPLS_LABELS_ADD;
 211         } else {
 212                 cmd = ZEBRA_MPLS_LABELS_DELETE;
 213         }
 214
 215         if (zebra_send_mpls_labels(zclient, cmd, &zl) == ZCLIENT_SEND_FAILURE)
 216                 return -1;
 217
 218         return 0;
 219 }
 220
 221 enum where_to_restart {
 222         SHARP_INSTALL_ROUTES_RESTART,
 223         SHARP_DELETE_ROUTES_RESTART,
 224 };
 225
 226 struct buffer_delay {
 227         struct prefix p;
 228         uint32_t count;
 229         uint32_t routes;
 230         vrf_id_t vrf_id;
 231         uint8_t instance;
 232         uint32_t nhgid;
 233         uint32_t flags;
 234         const struct nexthop_group *nhg;
 235         const struct nexthop_group *backup_nhg;
 236         enum where_to_restart restart;
 237         char *opaque;
 238 } wb;
 239
 240 /*
 241  * route_add - Encodes a route to zebra
 242  *
 243  * This function returns true when the route was buffered
 244  * by the underlying stream system
 245  */
 246 static bool route_add(const struct prefix *p, vrf_id_t vrf_id, uint8_t instance,
 247                       uint32_t nhgid, const struct nexthop_group *nhg,
 248                       const struct nexthop_group *backup_nhg, uint32_t flags,
 249                       char *opaque)
 250 {
 251         struct zapi_route api;
 252         struct zapi_nexthop *api_nh;
 253         struct nexthop *nh;
 254         int i = 0;
 255
 256         memset(&api, 0, sizeof(api));
 257         api.vrf_id = vrf_id;
 258         api.type = ZEBRA_ROUTE_SHARP;
 259         api.instance = instance;
 260         api.safi = SAFI_UNICAST;
 261         memcpy(&api.prefix, p, sizeof(*p));
 262
 263         api.flags = flags;
 264         SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
 265         SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
 266
 267         /* Only send via ID if nhgroup has been successfully installed */
 268         if (nhgid && sharp_nhgroup_id_is_installed(nhgid)) {
 269                 SET_FLAG(api.message, ZAPI_MESSAGE_NHG);
 270                 api.nhgid = nhgid;
 271         } else {
 272                 for (ALL_NEXTHOPS_PTR(nhg, nh)) {
 273                         api_nh = &api.nexthops[i];
 274
 275                         zapi_nexthop_from_nexthop(api_nh, nh);
 276
 277                         i++;
 278                 }
 279                 api.nexthop_num = i;
 280         }
 281
 282         /* Include backup nexthops, if present */
 283         if (backup_nhg && backup_nhg->nexthop) {
 284                 SET_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS);
 285
 286                 i = 0;
 287                 for (ALL_NEXTHOPS_PTR(backup_nhg, nh)) {
 288                         api_nh = &api.backup_nexthops[i];
 289
 290                         zapi_backup_nexthop_from_nexthop(api_nh, nh);
 291
 292                         i++;
 293                 }
 294
 295                 api.backup_nexthop_num = i;
 296         }
 297
 298         if (strlen(opaque)) {
 299                 SET_FLAG(api.message, ZAPI_MESSAGE_OPAQUE);
 300                 api.opaque.length = strlen(opaque) + 1;
 301                 assert(api.opaque.length <= ZAPI_MESSAGE_OPAQUE_LENGTH);
 302                 memcpy(api.opaque.data, opaque, api.opaque.length);
 303         }
 304
 305         if (zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api)
 306             == ZCLIENT_SEND_BUFFERED)
 307                 return true;
 308         else
 309                 return false;
 310 }
 311
 312 /*
 313  * route_delete - Encodes a route for deletion to zebra
 314  *
 315  * This function returns true when the route sent was
 316  * buffered by the underlying stream system.
 317  */
 318 static bool route_delete(struct prefix *p, vrf_id_t vrf_id, uint8_t instance)
 319 {
 320         struct zapi_route api;
 321
 322         memset(&api, 0, sizeof(api));
 323         api.vrf_id = vrf_id;
 324         api.type = ZEBRA_ROUTE_SHARP;
 325         api.safi = SAFI_UNICAST;
 326         api.instance = instance;
 327         memcpy(&api.prefix, p, sizeof(*p));
 328
 329         if (zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api)
 330             == ZCLIENT_SEND_BUFFERED)
 331                 return true;
 332         else
 333                 return false;
 334 }
 335
 336 static void sharp_install_routes_restart(struct prefix *p, uint32_t count,
 337                                          vrf_id_t vrf_id, uint8_t instance,
 338                                          uint32_t nhgid,
 339                                          const struct nexthop_group *nhg,
 340                                          const struct nexthop_group *backup_nhg,
 341                                          uint32_t routes, uint32_t flags,
 342                                          char *opaque)
 343 {
 344         uint32_t temp, i;
 345         bool v4 = false;
 346
 347         if (p->family == AF_INET) {
 348                 v4 = true;
 349                 temp = ntohl(p->u.prefix4.s_addr);
 350         } else
 351                 temp = ntohl(p->u.val32[3]);
 352
 353         for (i = count; i < routes; i++) {
 354                 bool buffered = route_add(p, vrf_id, (uint8_t)instance, nhgid,
 355                                           nhg, backup_nhg, flags, opaque);
 356                 if (v4)
 357                         p->u.prefix4.s_addr = htonl(++temp);
 358                 else
 359                         p->u.val32[3] = htonl(++temp);
 360
 361                 if (buffered) {
 362                         wb.p = *p;
 363                         wb.count = i+1;
 364                         wb.routes = routes;
 365                         wb.vrf_id = vrf_id;
 366                         wb.instance = instance;
 367                         wb.nhgid = nhgid;
 368                         wb.nhg = nhg;
 369                         wb.flags = flags;
 370                         wb.backup_nhg = backup_nhg;
 371                         wb.opaque = opaque;
 372                         wb.restart = SHARP_INSTALL_ROUTES_RESTART;
 373
 374                         return;
 375                 }
 376         }
 377 }
 378
 379 void sharp_install_routes_helper(struct prefix *p, vrf_id_t vrf_id,
 380                                  uint8_t instance, uint32_t nhgid,
 381                                  const struct nexthop_group *nhg,
 382                                  const struct nexthop_group *backup_nhg,
 383                                  uint32_t routes, uint32_t flags, char *opaque)
 384 {
 385         zlog_debug("Inserting %u routes", routes);
 386
 387         /* Only use backup route/nexthops if present */
 388         if (backup_nhg && (backup_nhg->nexthop == NULL))
 389                 backup_nhg = NULL;
 390
 391         monotime(&sg.r.t_start);
 392         sharp_install_routes_restart(p, 0, vrf_id, instance, nhgid, nhg,
 393                                      backup_nhg, routes, flags, opaque);
 394 }
 395
 396 static void sharp_remove_routes_restart(struct prefix *p, uint32_t count,
 397                                         vrf_id_t vrf_id, uint8_t instance,
 398                                         uint32_t routes)
 399 {
 400         uint32_t temp, i;
 401         bool v4 = false;
 402
 403         if (p->family == AF_INET) {
 404                 v4 = true;
 405                 temp = ntohl(p->u.prefix4.s_addr);
 406         } else
 407                 temp = ntohl(p->u.val32[3]);
 408
 409         for (i = count; i < routes; i++) {
 410                 bool buffered = route_delete(p, vrf_id, (uint8_t)instance);
 411
 412                 if (v4)
 413                         p->u.prefix4.s_addr = htonl(++temp);
 414                 else
 415                         p->u.val32[3] = htonl(++temp);
 416
 417                 if (buffered) {
 418                         wb.p = *p;
 419                         wb.count = i + 1;
 420                         wb.vrf_id = vrf_id;
 421                         wb.instance = instance;
 422                         wb.routes = routes;
 423                         wb.restart = SHARP_DELETE_ROUTES_RESTART;
 424
 425                         return;
 426                 }
 427         }
 428 }
 429
 430 void sharp_remove_routes_helper(struct prefix *p, vrf_id_t vrf_id,
 431                                 uint8_t instance, uint32_t routes)
 432 {
 433         zlog_debug("Removing %u routes", routes);
 434
 435         monotime(&sg.r.t_start);
 436
 437         sharp_remove_routes_restart(p, 0, vrf_id, instance, routes);
 438 }
 439
 440 static void handle_repeated(bool installed)
 441 {
 442         struct prefix p = sg.r.orig_prefix;
 443         sg.r.repeat--;
 444
 445         if (sg.r.repeat <= 0)
 446                 return;
 447
 448         if (installed) {
 449                 sg.r.removed_routes = 0;
 450                 sharp_remove_routes_helper(&p, sg.r.vrf_id,
 451                                            sg.r.inst, sg.r.total_routes);
 452         }
 453
 454         if (!installed) {
 455                 sg.r.installed_routes = 0;
 456                 sharp_install_routes_helper(&p, sg.r.vrf_id, sg.r.inst,
 457                                             sg.r.nhgid, &sg.r.nhop_group,
 458                                             &sg.r.backup_nhop_group,
 459                                             sg.r.total_routes, sg.r.flags,
 460                                             sg.r.opaque);
 461         }
 462 }
 463
 464 static void sharp_zclient_buffer_ready(void)
 465 {
 466         switch (wb.restart) {
 467         case SHARP_INSTALL_ROUTES_RESTART:
 468                 sharp_install_routes_restart(
 469                         &wb.p, wb.count, wb.vrf_id, wb.instance, wb.nhgid,
 470                         wb.nhg, wb.backup_nhg, wb.routes, wb.flags,
 471                         wb.opaque);
 472                 return;
 473         case SHARP_DELETE_ROUTES_RESTART:
 474                 sharp_remove_routes_restart(&wb.p, wb.count, wb.vrf_id,
 475                                             wb.instance, wb.routes);
 476                 return;
 477         }
 478 }
 479
 480 static int route_notify_owner(ZAPI_CALLBACK_ARGS)
 481 {
 482         struct timeval r;
 483         struct prefix p;
 484         enum zapi_route_notify_owner note;
 485         uint32_t table;
 486
 487         if (!zapi_route_notify_decode(zclient->ibuf, &p, &table, &note,
 488                                       NULL, NULL))
 489                 return -1;
 490
 491         switch (note) {
 492         case ZAPI_ROUTE_INSTALLED:
 493                 sg.r.installed_routes++;
 494                 if (sg.r.total_routes == sg.r.installed_routes) {
 495                         monotime(&sg.r.t_end);
 496                         timersub(&sg.r.t_end, &sg.r.t_start, &r);
 497                         zlog_debug("Installed All Items %jd.%ld",
 498                                    (intmax_t)r.tv_sec, (long)r.tv_usec);
 499                         handle_repeated(true);
 500                 }
 501                 break;
 502         case ZAPI_ROUTE_FAIL_INSTALL:
 503                 zlog_debug("Failed install of route");
 504                 break;
 505         case ZAPI_ROUTE_BETTER_ADMIN_WON:
 506                 zlog_debug("Better Admin Distance won over us");
 507                 break;
 508         case ZAPI_ROUTE_REMOVED:
 509                 sg.r.removed_routes++;
 510                 if (sg.r.total_routes == sg.r.removed_routes) {
 511                         monotime(&sg.r.t_end);
 512                         timersub(&sg.r.t_end, &sg.r.t_start, &r);
 513                         zlog_debug("Removed all Items %jd.%ld",
 514                                    (intmax_t)r.tv_sec, (long)r.tv_usec);
 515                         handle_repeated(false);
 516                 }
 517                 break;
 518         case ZAPI_ROUTE_REMOVE_FAIL:
 519                 zlog_debug("Route removal Failure");
 520                 break;
 521         }
 522         return 0;
 523 }
 524
 525 static void zebra_connected(struct zclient *zclient)
 526 {
 527         zclient_send_reg_requests(zclient, VRF_DEFAULT);
 528
 529         /*
 530          * Do not actually turn this on yet
 531          * This is just the start of the infrastructure needed here
 532          * This can be fixed at a later time.
 533          *
 534          *      zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP,
 535          *                      ZEBRA_ROUTE_ALL, 0, VRF_DEFAULT);
 536          */
 537 }
 538
 539 void vrf_label_add(vrf_id_t vrf_id, afi_t afi, mpls_label_t label)
 540 {
 541         zclient_send_vrf_label(zclient, vrf_id, afi, label, ZEBRA_LSP_SHARP);
 542 }
 543
 544 void nhg_add(uint32_t id, const struct nexthop_group *nhg,
 545              const struct nexthop_group *backup_nhg)
 546 {
 547         struct zapi_nhg api_nhg = {};
 548         struct zapi_nexthop *api_nh;
 549         struct nexthop *nh;
 550         bool is_valid = true;
 551
 552         api_nhg.id = id;
 553         for (ALL_NEXTHOPS_PTR(nhg, nh)) {
 554                 if (api_nhg.nexthop_num >= MULTIPATH_NUM) {
 555                         zlog_warn(
 556                                 "%s: number of nexthops greater than max multipath size, truncating",
 557                                 __func__);
 558                         break;
 559                 }
 560
 561                 /* Unresolved nexthops will lead to failure - only send
 562                  * nexthops that zebra will consider valid.
 563                  */
 564                 if (nh->ifindex == 0)
 565                         continue;
 566
 567                 api_nh = &api_nhg.nexthops[api_nhg.nexthop_num];
 568
 569                 zapi_nexthop_from_nexthop(api_nh, nh);
 570                 api_nhg.nexthop_num++;
 571         }
 572
 573         if (api_nhg.nexthop_num == 0) {
 574                 zlog_debug("%s: nhg %u not sent: no valid nexthops",
 575                            __func__, id);
 576                 is_valid = false;
 577                 goto done;
 578         }
 579
 580         if (backup_nhg) {
 581                 for (ALL_NEXTHOPS_PTR(backup_nhg, nh)) {
 582                         if (api_nhg.backup_nexthop_num >= MULTIPATH_NUM) {
 583                                 zlog_warn(
 584                                         "%s: number of backup nexthops greater than max multipath size, truncating",
 585                                         __func__);
 586                                 break;
 587                         }
 588
 589                         /* Unresolved nexthop: will be rejected by zebra.
 590                          * That causes a problem, since the primary nexthops
 591                          * rely on array indexing into the backup nexthops. If
 592                          * that array isn't valid, the backup indexes won't be
 593                          * valid.
 594                          */
 595                         if (nh->ifindex == 0) {
 596                                 zlog_debug("%s: nhg %u: invalid backup nexthop",
 597                                            __func__, id);
 598                                 is_valid = false;
 599                                 break;
 600                         }
 601
 602                         api_nh = &api_nhg.backup_nexthops
 603                                           [api_nhg.backup_nexthop_num];
 604
 605                         zapi_backup_nexthop_from_nexthop(api_nh, nh);
 606                         api_nhg.backup_nexthop_num++;
 607                 }
 608         }
 609
 610 done:
 611         if (is_valid)
 612                 zclient_nhg_send(zclient, ZEBRA_NHG_ADD, &api_nhg);
 613 }
 614
 615 void nhg_del(uint32_t id)
 616 {
 617         struct zapi_nhg api_nhg = {};
 618
 619         api_nhg.id = id;
 620
 621         zclient_nhg_send(zclient, ZEBRA_NHG_DEL, &api_nhg);
 622 }
 623
 624 void sharp_zebra_nexthop_watch(struct prefix *p, vrf_id_t vrf_id, bool import,
 625                                bool watch, bool connected)
 626 {
 627         int command;
 628
 629         command = ZEBRA_NEXTHOP_REGISTER;
 630
 631         if (!watch)
 632                 command = ZEBRA_NEXTHOP_UNREGISTER;
 633
 634         if (zclient_send_rnh(zclient, command, p, connected, false, vrf_id)
 635             == ZCLIENT_SEND_FAILURE)
 636                 zlog_warn("%s: Failure to send nexthop to zebra", __func__);
 637 }
 638
 639 static int sharp_debug_nexthops(struct zapi_route *api)
 640 {
 641         int i;
 642
 643         if (api->nexthop_num == 0) {
 644                 zlog_debug(
 645                         "        Not installed");
 646                 return 0;
 647         }
 648
 649         for (i = 0; i < api->nexthop_num; i++) {
 650                 struct zapi_nexthop *znh = &api->nexthops[i];
 651
 652                 switch (znh->type) {
 653                 case NEXTHOP_TYPE_IPV4_IFINDEX:
 654                 case NEXTHOP_TYPE_IPV4:
 655                         zlog_debug(
 656                                 "        Nexthop %pI4, type: %d, ifindex: %d, vrf: %d, label_num: %d",
 657                                 &znh->gate.ipv4.s_addr, znh->type, znh->ifindex,
 658                                 znh->vrf_id, znh->label_num);
 659                         break;
 660                 case NEXTHOP_TYPE_IPV6_IFINDEX:
 661                 case NEXTHOP_TYPE_IPV6:
 662                         zlog_debug(
 663                                 "        Nexthop %pI6, type: %d, ifindex: %d, vrf: %d, label_num: %d",
 664                                 &znh->gate.ipv6, znh->type, znh->ifindex,
 665                                 znh->vrf_id, znh->label_num);
 666                         break;
 667                 case NEXTHOP_TYPE_IFINDEX:
 668                         zlog_debug("        Nexthop IFINDEX: %d, ifindex: %d",
 669                                    znh->type, znh->ifindex);
 670                         break;
 671                 case NEXTHOP_TYPE_BLACKHOLE:
 672                         zlog_debug("        Nexthop blackhole");
 673                         break;
 674                 }
 675         }
 676
 677         return i;
 678 }
 679 static int sharp_nexthop_update(ZAPI_CALLBACK_ARGS)
 680 {
 681         struct sharp_nh_tracker *nht;
 682         struct zapi_route nhr;
 683         struct prefix matched;
 684
 685         if (!zapi_nexthop_update_decode(zclient->ibuf, &matched, &nhr)) {
 686                 zlog_err("%s: Decode of update failed", __func__);
 687                 return 0;
 688         }
 689
 690         zlog_debug("Received update for %pFX actual match: %pFX metric: %u",
 691                    &matched, &nhr.prefix, nhr.metric);
 692
 693         nht = sharp_nh_tracker_get(&matched);
 694         nht->nhop_num = nhr.nexthop_num;
 695         nht->updates++;
 696
 697         sharp_debug_nexthops(&nhr);
 698
 699         return 0;
 700 }
 701
 702 static int sharp_redistribute_route(ZAPI_CALLBACK_ARGS)
 703 {
 704         struct zapi_route api;
 705
 706         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 707                 zlog_warn("%s: Decode of redistribute failed: %d", __func__,
 708                           ZEBRA_REDISTRIBUTE_ROUTE_ADD);
 709
 710         zlog_debug("%s: %pFX (%s)", zserv_command_string(cmd),
 711                    &api.prefix, zebra_route_string(api.type));
 712
 713         sharp_debug_nexthops(&api);
 714
 715         return 0;
 716 }
 717
 718 void sharp_redistribute_vrf(struct vrf *vrf, int type)
 719 {
 720         zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type,
 721                                 0, vrf->vrf_id);
 722 }
 723
 724 static zclient_handler *const sharp_opaque_handlers[] = {
 725         [ZEBRA_OPAQUE_MESSAGE] = sharp_opaque_handler,
 726 };
 727
 728 /* Add a zclient with a specified session id, for testing. */
 729 int sharp_zclient_create(uint32_t session_id)
 730 {
 731         struct zclient *client;
 732         struct sharp_zclient *node;
 733
 734         /* Check for duplicates */
 735         for (node = sharp_clients_head; node != NULL; node = node->next) {
 736                 if (node->client->session_id == session_id)
 737                         return -1;
 738         }
 739
 740         client = zclient_new(master, &zclient_options_default,
 741                              sharp_opaque_handlers,
 742                              array_size(sharp_opaque_handlers));
 743         client->sock = -1;
 744         client->session_id = session_id;
 745
 746         zclient_init(client, ZEBRA_ROUTE_SHARP, 0, &sharp_privs);
 747
 748         /* Enqueue on the list of test clients */
 749         add_zclient(client);
 750
 751         return 0;
 752 }
 753
 754 /* Delete one of the extra test zclients */
 755 int sharp_zclient_delete(uint32_t session_id)
 756 {
 757         struct sharp_zclient *node;
 758
 759         /* Search for session */
 760         for (node = sharp_clients_head; node != NULL; node = node->next) {
 761                 if (node->client->session_id == session_id) {
 762                         /* Dequeue from list */
 763                         if (node->next)
 764                                 node->next->prev = node->prev;
 765                         if (node->prev)
 766                                 node->prev->next = node->next;
 767                         if (node == sharp_clients_head)
 768                                 sharp_clients_head = node->next;
 769
 770                         /* Clean up zclient */
 771                         zclient_stop(node->client);
 772                         zclient_free(node->client);
 773
 774                         /* Free memory */
 775                         XFREE(MTYPE_ZC, node);
 776                         break;
 777                 }
 778         }
 779
 780         return 0;
 781 }
 782
 783 static const char *const type2txt[] = { "Generic", "Vertex", "Edge", "Subnet" };
 784 static const char *const status2txt[] = { "Unknown", "New", "Update",
 785                                           "Delete", "Sync", "Orphan"};
 786 /* Handler for opaque messages */
 787 static int sharp_opaque_handler(ZAPI_CALLBACK_ARGS)
 788 {
 789         struct stream *s;
 790         struct zapi_opaque_msg info;
 791         struct ls_element *lse;
 792
 793         s = zclient->ibuf;
 794
 795         if (zclient_opaque_decode(s, &info) != 0)
 796                 return -1;
 797
 798         zlog_debug("%s: [%u] received opaque type %u", __func__,
 799                    zclient->session_id, info.type);
 800
 801         if (info.type == LINK_STATE_UPDATE) {
 802                 lse = ls_stream2ted(sg.ted, s, false);
 803                 if (lse) {
 804                         zlog_debug(" |- Got %s %s from Link State Database",
 805                                    status2txt[lse->status],
 806                                    type2txt[lse->type]);
 807                         lse->status = SYNC;
 808                 }
 809                 else
 810                         zlog_debug(
 811                                 "%s: Error to convert Stream into Link State",
 812                                 __func__);
 813         }
 814
 815         return 0;
 816 }
 817
 818 /*
 819  * Send OPAQUE messages, using subtype 'type'.
 820  */
 821 void sharp_opaque_send(uint32_t type, uint32_t proto, uint32_t instance,
 822                        uint32_t session_id, uint32_t count)
 823 {
 824         uint8_t buf[32];
 825         int ret;
 826         uint32_t i;
 827
 828         /* Prepare a small payload */
 829         for (i = 0; i < sizeof(buf); i++) {
 830                 if (type < 255)
 831                         buf[i] = type;
 832                 else
 833                         buf[i] = 255;
 834         }
 835
 836         /* Send some messages - broadcast and unicast are supported */
 837         for (i = 0; i < count; i++) {
 838                 if (proto == 0)
 839                         ret = zclient_send_opaque(zclient, type, buf,
 840                                                   sizeof(buf));
 841                 else
 842                         ret = zclient_send_opaque_unicast(zclient, type, proto,
 843                                                           instance, session_id,
 844                                                           buf, sizeof(buf));
 845                 if (ret == ZCLIENT_SEND_FAILURE) {
 846                         zlog_debug("%s: send_opaque() failed => %d",
 847                                    __func__, ret);
 848                         break;
 849                 }
 850         }
 851
 852 }
 853
 854 /*
 855  * Send OPAQUE registration messages, using subtype 'type'.
 856  */
 857 void sharp_opaque_reg_send(bool is_reg, uint32_t proto, uint32_t instance,
 858                            uint32_t session_id, uint32_t type)
 859 {
 860         struct stream *s;
 861
 862         s = zclient->obuf;
 863         stream_reset(s);
 864
 865         if (is_reg)
 866                 zclient_create_header(s, ZEBRA_OPAQUE_REGISTER, VRF_DEFAULT);
 867         else
 868                 zclient_create_header(s, ZEBRA_OPAQUE_UNREGISTER, VRF_DEFAULT);
 869
 870         /* Send sub-type */
 871         stream_putl(s, type);
 872
 873         /* Add zclient info */
 874         stream_putc(s, proto);
 875         stream_putw(s, instance);
 876         stream_putl(s, session_id);
 877
 878         /* Put length at the first point of the stream. */
 879         stream_putw_at(s, 0, stream_get_endp(s));
 880
 881         (void)zclient_send_message(zclient);
 882
 883 }
 884
 885 /* Link State registration */
 886 void sharp_zebra_register_te(void)
 887 {
 888         /* First register to received Link State Update messages */
 889         zclient_register_opaque(zclient, LINK_STATE_UPDATE);
 890
 891         /* Then, request initial TED with SYNC message */
 892         ls_request_sync(zclient);
 893 }
 894
 895 void sharp_zebra_send_arp(const struct interface *ifp, const struct prefix *p)
 896 {
 897         zclient_send_neigh_discovery_req(zclient, ifp, p);
 898 }
 899
 900 static int nhg_notify_owner(ZAPI_CALLBACK_ARGS)
 901 {
 902         enum zapi_nhg_notify_owner note;
 903         uint32_t id;
 904
 905         if (!zapi_nhg_notify_decode(zclient->ibuf, &id, &note))
 906                 return -1;
 907
 908         switch (note) {
 909         case ZAPI_NHG_INSTALLED:
 910                 sharp_nhgroup_id_set_installed(id, true);
 911                 zlog_debug("Installed nhg %u", id);
 912                 break;
 913         case ZAPI_NHG_FAIL_INSTALL:
 914                 zlog_debug("Failed install of nhg %u", id);
 915                 break;
 916         case ZAPI_NHG_REMOVED:
 917                 zlog_debug("Removed nhg %u", id);
 918                 break;
 919         case ZAPI_NHG_REMOVE_FAIL:
 920                 zlog_debug("Failed removal of nhg %u", id);
 921                 break;
 922         }
 923
 924         return 0;
 925 }
 926
 927 int sharp_zebra_srv6_manager_get_locator_chunk(const char *locator_name)
 928 {
 929         return srv6_manager_get_locator_chunk(zclient, locator_name);
 930 }
 931
 932 int sharp_zebra_srv6_manager_release_locator_chunk(const char *locator_name)
 933 {
 934         return srv6_manager_release_locator_chunk(zclient, locator_name);
 935 }
 936
 937 static int sharp_zebra_process_srv6_locator_chunk(ZAPI_CALLBACK_ARGS)
 938 {
 939         struct stream *s = NULL;
 940         struct srv6_locator_chunk s6c = {};
 941         struct listnode *node, *nnode;
 942         struct sharp_srv6_locator *loc;
 943
 944         s = zclient->ibuf;
 945         zapi_srv6_locator_chunk_decode(s, &s6c);
 946
 947         for (ALL_LIST_ELEMENTS(sg.srv6_locators, node, nnode, loc)) {
 948                 struct prefix_ipv6 *chunk = NULL;
 949                 struct listnode *chunk_node;
 950                 struct prefix_ipv6 *c;
 951
 952                 if (strcmp(loc->name, s6c.locator_name) != 0) {
 953                         zlog_err("%s: Locator name unmatch %s:%s", __func__,
 954                                  loc->name, s6c.locator_name);
 955                         continue;
 956                 }
 957
 958                 for (ALL_LIST_ELEMENTS_RO(loc->chunks, chunk_node, c))
 959                         if (!prefix_cmp(c, &s6c.prefix))
 960                                 return 0;
 961
 962                 chunk = prefix_ipv6_new();
 963                 *chunk = s6c.prefix;
 964                 listnode_add(loc->chunks, chunk);
 965                 return 0;
 966         }
 967
 968         zlog_err("%s: can't get locator_chunk!!", __func__);
 969         return 0;
 970 }
 971
 972 int sharp_zebra_send_interface_protodown(struct interface *ifp, bool down)
 973 {
 974         zlog_debug("Sending zebra to set %s protodown %s", ifp->name,
 975                    down ? "on" : "off");
 976
 977         if (zclient_send_interface_protodown(zclient, ifp->vrf->vrf_id, ifp,
 978                                              down) == ZCLIENT_SEND_FAILURE)
 979                 return -1;
 980
 981         return 0;
 982 }
 983
 984 static zclient_handler *const sharp_handlers[] = {
 985         [ZEBRA_INTERFACE_ADDRESS_ADD] = interface_address_add,
 986         [ZEBRA_INTERFACE_ADDRESS_DELETE] = interface_address_delete,
 987         [ZEBRA_ROUTE_NOTIFY_OWNER] = route_notify_owner,
 988         [ZEBRA_NEXTHOP_UPDATE] = sharp_nexthop_update,
 989         [ZEBRA_NHG_NOTIFY_OWNER] = nhg_notify_owner,
 990         [ZEBRA_REDISTRIBUTE_ROUTE_ADD] = sharp_redistribute_route,
 991         [ZEBRA_REDISTRIBUTE_ROUTE_DEL] = sharp_redistribute_route,
 992         [ZEBRA_OPAQUE_MESSAGE] = sharp_opaque_handler,
 993         [ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK] =
 994                 sharp_zebra_process_srv6_locator_chunk,
 995 };
 996
 997 void sharp_zebra_init(void)
 998 {
 999         struct zclient_options opt = {.receive_notify = true};
1000
1001         if_zapi_callbacks(sharp_ifp_create, sharp_ifp_up,
1002                           sharp_ifp_down, sharp_ifp_destroy);
1003
1004         zclient = zclient_new(master, &opt, sharp_handlers,
1005                               array_size(sharp_handlers));
1006
1007         zclient_init(zclient, ZEBRA_ROUTE_SHARP, 0, &sharp_privs);
1008         zclient->zebra_connected = zebra_connected;
1009         zclient->zebra_buffer_write_ready = sharp_zclient_buffer_ready;
1010 }