zebra/zebra_pbr.c

   1 /* Zebra Policy Based Routing (PBR) main handling.
   2  * Copyright (C) 2018  Cumulus Networks, Inc.
   3  *
   4  * This file is part of FRR.
   5  *
   6  * FRR is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * FRR is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with FRR; see the file COPYING.  If not, write to the Free
  18  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19  * 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include <jhash.h>
  25 #include <hash.h>
  26 #include <memory.h>
  27 #include <hook.h>
  28
  29 #include "zebra/zebra_router.h"
  30 #include "zebra/zebra_pbr.h"
  31 #include "zebra/rt.h"
  32 #include "zebra/zapi_msg.h"
  33 #include "zebra/zebra_memory.h"
  34 #include "zebra/zserv.h"
  35
  36 /* definitions */
  37 DEFINE_MTYPE_STATIC(ZEBRA, PBR_IPTABLE_IFNAME, "PBR interface list")
  38
  39 /* definitions */
  40 static const struct message ipset_type_msg[] = {
  41         {IPSET_NET_PORT_NET, "net,port,net"},
  42         {IPSET_NET_PORT, "net,port"},
  43         {IPSET_NET_NET, "net,net"},
  44         {IPSET_NET, "net"},
  45         {0}
  46 };
  47
  48 const struct message icmp_typecode_str[] = {
  49         { 0 << 8, "echo-reply"},
  50         { 0 << 8, "pong"},
  51         { 3 << 8, "network-unreachable"},
  52         { (3 << 8) + 1, "host-unreachable"},
  53         { (3 << 8) + 2, "protocol-unreachable"},
  54         { (3 << 8) + 3, "port-unreachable"},
  55         { (3 << 8) + 4, "fragmentation-needed"},
  56         { (3 << 8) + 5, "source-route-failed"},
  57         { (3 << 8) + 6, "network-unknown"},
  58         { (3 << 8) + 7, "host-unknown"},
  59         { (3 << 8) + 9, "network-prohibited"},
  60         { (3 << 8) + 10, "host-prohibited"},
  61         { (3 << 8) + 11, "TOS-network-unreachable"},
  62         { (3 << 8) + 12, "TOS-host-unreachable"},
  63         { (3 << 8) + 13, "communication-prohibited"},
  64         { (3 << 8) + 14, "host-precedence-violation"},
  65         { (3 << 8) + 15, "precedence-cutoff"},
  66         { 4 << 8, "source-quench"},
  67         { 5 << 8, "network-redirect"},
  68         { (5 << 8) +  1, "host-redirect"},
  69         { (5 << 8) +  2, "TOS-network-redirect"},
  70         { (5 << 8) +  3, "TOS-host-redirect"},
  71         { 8 << 8, "echo-request"},
  72         { 8 << 8, "ping"},
  73         { 9 << 8, "router-advertisement"},
  74         { 10 << 8, "router-solicitation"},
  75         { 11 << 8, "ttl-zero-during-transit"},
  76         { (11 << 8) + 1, "ttl-zero-during-reassembly"},
  77         { 12 << 8, "ip-header-bad"},
  78         { (12 << 8) + 1, "required-option-missing"},
  79         { 13 << 8, "timestamp-request"},
  80         { 14 << 8, "timestamp-reply"},
  81         { 17 << 8, "address-mask-request"},
  82         { 18 << 8, "address-mask-reply"},
  83         {0}
  84 };
  85
  86 /* definitions */
  87 static const struct message tcp_value_str[] = {
  88         {TCP_HEADER_FIN, "FIN"},
  89         {TCP_HEADER_SYN, "SYN"},
  90         {TCP_HEADER_RST, "RST"},
  91         {TCP_HEADER_PSH, "PSH"},
  92         {TCP_HEADER_ACK, "ACK"},
  93         {TCP_HEADER_URG, "URG"},
  94         {0}
  95 };
  96
  97 static const struct message fragment_value_str[] = {
  98         {1, "dont-fragment"},
  99         {2, "is-fragment"},
 100         {4, "first-fragment"},
 101         {8, "last-fragment"},
 102         {0}
 103 };
 104
 105 /* static function declarations */
 106 DEFINE_HOOK(zebra_pbr_ipset_entry_get_stat,
 107             (struct zebra_pbr_ipset_entry *ipset, uint64_t *pkts,
 108              uint64_t *bytes),
 109             (ipset, pkts, bytes))
 110
 111 DEFINE_HOOK(zebra_pbr_iptable_get_stat,
 112             (struct zebra_pbr_iptable *iptable, uint64_t *pkts,
 113              uint64_t *bytes),
 114             (iptable, pkts, bytes))
 115
 116 DEFINE_HOOK(zebra_pbr_iptable_update,
 117             (int cmd, struct zebra_pbr_iptable *iptable), (cmd, iptable));
 118
 119 DEFINE_HOOK(zebra_pbr_ipset_entry_update,
 120             (int cmd, struct zebra_pbr_ipset_entry *ipset), (cmd, ipset));
 121
 122 DEFINE_HOOK(zebra_pbr_ipset_update,
 123             (int cmd, struct zebra_pbr_ipset *ipset), (cmd, ipset));
 124
 125 /* Private functions */
 126
 127 /* Public functions */
 128 void zebra_pbr_rules_free(void *arg)
 129 {
 130         struct zebra_pbr_rule *rule;
 131
 132         rule = (struct zebra_pbr_rule *)arg;
 133
 134         (void)kernel_del_pbr_rule(rule);
 135         XFREE(MTYPE_TMP, rule);
 136 }
 137
 138 uint32_t zebra_pbr_rules_hash_key(const void *arg)
 139 {
 140         const struct zebra_pbr_rule *rule;
 141         uint32_t key;
 142
 143         rule = arg;
 144         key = jhash_3words(rule->rule.seq, rule->rule.priority,
 145                            rule->rule.action.table,
 146                            prefix_hash_key(&rule->rule.filter.src_ip));
 147
 148         if (rule->rule.filter.fwmark)
 149                 key = jhash_3words(rule->rule.filter.fwmark, rule->vrf_id,
 150                                    rule->rule.ifindex, key);
 151         else
 152                 key = jhash_2words(rule->vrf_id, rule->rule.ifindex, key);
 153
 154         return jhash_3words(rule->rule.filter.src_port,
 155                             rule->rule.filter.dst_port,
 156                             prefix_hash_key(&rule->rule.filter.dst_ip),
 157                             jhash_1word(rule->rule.unique, key));
 158 }
 159
 160 bool zebra_pbr_rules_hash_equal(const void *arg1, const void *arg2)
 161 {
 162         const struct zebra_pbr_rule *r1, *r2;
 163
 164         r1 = (const struct zebra_pbr_rule *)arg1;
 165         r2 = (const struct zebra_pbr_rule *)arg2;
 166
 167         if (r1->rule.seq != r2->rule.seq)
 168                 return false;
 169
 170         if (r1->rule.priority != r2->rule.priority)
 171                 return false;
 172
 173         if (r1->rule.unique != r2->rule.unique)
 174                 return false;
 175
 176         if (r1->rule.action.table != r2->rule.action.table)
 177                 return false;
 178
 179         if (r1->rule.filter.src_port != r2->rule.filter.src_port)
 180                 return false;
 181
 182         if (r1->rule.filter.dst_port != r2->rule.filter.dst_port)
 183                 return false;
 184
 185         if (r1->rule.filter.fwmark != r2->rule.filter.fwmark)
 186                 return false;
 187
 188         if (!prefix_same(&r1->rule.filter.src_ip, &r2->rule.filter.src_ip))
 189                 return false;
 190
 191         if (!prefix_same(&r1->rule.filter.dst_ip, &r2->rule.filter.dst_ip))
 192                 return false;
 193
 194         if (r1->rule.ifindex != r2->rule.ifindex)
 195                 return false;
 196
 197         if (r1->vrf_id != r2->vrf_id)
 198                 return false;
 199
 200         return true;
 201 }
 202
 203 struct pbr_rule_unique_lookup {
 204         struct zebra_pbr_rule *rule;
 205         uint32_t unique;
 206         ifindex_t ifindex;
 207         vrf_id_t vrf_id;
 208 };
 209
 210 static int pbr_rule_lookup_unique_walker(struct hash_bucket *b, void *data)
 211 {
 212         struct pbr_rule_unique_lookup *pul = data;
 213         struct zebra_pbr_rule *rule = b->data;
 214
 215         if (pul->unique == rule->rule.unique
 216             && pul->ifindex == rule->rule.ifindex
 217             && pul->vrf_id == rule->vrf_id) {
 218                 pul->rule = rule;
 219                 return HASHWALK_ABORT;
 220         }
 221
 222         return HASHWALK_CONTINUE;
 223 }
 224
 225 static struct zebra_pbr_rule *
 226 pbr_rule_lookup_unique(struct zebra_pbr_rule *zrule)
 227 {
 228         struct pbr_rule_unique_lookup pul;
 229
 230         pul.unique = zrule->rule.unique;
 231         pul.ifindex = zrule->rule.ifindex;
 232         pul.rule = NULL;
 233         pul.vrf_id = zrule->vrf_id;
 234         hash_walk(zrouter.rules_hash, &pbr_rule_lookup_unique_walker, &pul);
 235
 236         return pul.rule;
 237 }
 238
 239 void zebra_pbr_ipset_free(void *arg)
 240 {
 241         struct zebra_pbr_ipset *ipset;
 242
 243         ipset = (struct zebra_pbr_ipset *)arg;
 244         hook_call(zebra_pbr_ipset_update, 0, ipset);
 245         XFREE(MTYPE_TMP, ipset);
 246 }
 247
 248 uint32_t zebra_pbr_ipset_hash_key(const void *arg)
 249 {
 250         const struct zebra_pbr_ipset *ipset = arg;
 251         uint32_t *pnt = (uint32_t *)&ipset->ipset_name;
 252         uint32_t key = jhash_1word(ipset->vrf_id, 0x63ab42de);
 253
 254         return jhash2(pnt, ZEBRA_IPSET_NAME_HASH_SIZE, key);
 255 }
 256
 257 bool zebra_pbr_ipset_hash_equal(const void *arg1, const void *arg2)
 258 {
 259         const struct zebra_pbr_ipset *r1, *r2;
 260
 261         r1 = (const struct zebra_pbr_ipset *)arg1;
 262         r2 = (const struct zebra_pbr_ipset *)arg2;
 263
 264         if (r1->type != r2->type)
 265                 return false;
 266         if (r1->unique != r2->unique)
 267                 return false;
 268         if (r1->vrf_id != r2->vrf_id)
 269                 return false;
 270
 271         if (strncmp(r1->ipset_name, r2->ipset_name,
 272                     ZEBRA_IPSET_NAME_SIZE))
 273                 return false;
 274         return true;
 275 }
 276
 277 void zebra_pbr_ipset_entry_free(void *arg)
 278 {
 279         struct zebra_pbr_ipset_entry *ipset;
 280
 281         ipset = (struct zebra_pbr_ipset_entry *)arg;
 282
 283         hook_call(zebra_pbr_ipset_entry_update, 0, ipset);
 284
 285         XFREE(MTYPE_TMP, ipset);
 286 }
 287
 288 uint32_t zebra_pbr_ipset_entry_hash_key(const void *arg)
 289 {
 290         const struct zebra_pbr_ipset_entry *ipset;
 291         uint32_t key;
 292
 293         ipset = arg;
 294         key = prefix_hash_key(&ipset->src);
 295         key = jhash_1word(ipset->unique, key);
 296         key = jhash_1word(prefix_hash_key(&ipset->dst), key);
 297         key = jhash(&ipset->dst_port_min, 2, key);
 298         key = jhash(&ipset->dst_port_max, 2, key);
 299         key = jhash(&ipset->src_port_min, 2, key);
 300         key = jhash(&ipset->src_port_max, 2, key);
 301         key = jhash(&ipset->proto, 1, key);
 302
 303         return key;
 304 }
 305
 306 bool zebra_pbr_ipset_entry_hash_equal(const void *arg1, const void *arg2)
 307 {
 308         const struct zebra_pbr_ipset_entry *r1, *r2;
 309
 310         r1 = (const struct zebra_pbr_ipset_entry *)arg1;
 311         r2 = (const struct zebra_pbr_ipset_entry *)arg2;
 312
 313         if (r1->unique != r2->unique)
 314                 return false;
 315
 316         if (!prefix_same(&r1->src, &r2->src))
 317                 return false;
 318
 319         if (!prefix_same(&r1->dst, &r2->dst))
 320                 return false;
 321
 322         if (r1->src_port_min != r2->src_port_min)
 323                 return false;
 324
 325         if (r1->src_port_max != r2->src_port_max)
 326                 return false;
 327
 328         if (r1->dst_port_min != r2->dst_port_min)
 329                 return false;
 330
 331         if (r1->dst_port_max != r2->dst_port_max)
 332                 return false;
 333
 334         if (r1->proto != r2->proto)
 335                 return false;
 336         return true;
 337 }
 338
 339 void zebra_pbr_iptable_free(void *arg)
 340 {
 341         struct zebra_pbr_iptable *iptable;
 342         struct listnode *node, *nnode;
 343         char *name;
 344
 345         iptable = (struct zebra_pbr_iptable *)arg;
 346         hook_call(zebra_pbr_iptable_update, 0, iptable);
 347
 348         if (iptable->interface_name_list) {
 349                 for (ALL_LIST_ELEMENTS(iptable->interface_name_list, node,
 350                                        nnode, name)) {
 351                         XFREE(MTYPE_PBR_IPTABLE_IFNAME, name);
 352                         list_delete_node(iptable->interface_name_list, node);
 353                 }
 354                 list_delete(&iptable->interface_name_list);
 355         }
 356         XFREE(MTYPE_TMP, iptable);
 357 }
 358
 359 uint32_t zebra_pbr_iptable_hash_key(const void *arg)
 360 {
 361         const struct zebra_pbr_iptable *iptable = arg;
 362         uint32_t *pnt = (uint32_t *)&(iptable->ipset_name);
 363         uint32_t key;
 364
 365         key = jhash2(pnt, ZEBRA_IPSET_NAME_HASH_SIZE,
 366                      0x63ab42de);
 367         key = jhash_1word(iptable->fwmark, key);
 368         key = jhash_1word(iptable->pkt_len_min, key);
 369         key = jhash_1word(iptable->pkt_len_max, key);
 370         key = jhash_1word(iptable->tcp_flags, key);
 371         key = jhash_1word(iptable->tcp_mask_flags, key);
 372         key = jhash_1word(iptable->dscp_value, key);
 373         key = jhash_1word(iptable->protocol, key);
 374         key = jhash_1word(iptable->fragment, key);
 375         key = jhash_1word(iptable->vrf_id, key);
 376
 377         return jhash_3words(iptable->filter_bm, iptable->type,
 378                             iptable->unique, key);
 379 }
 380
 381 bool zebra_pbr_iptable_hash_equal(const void *arg1, const void *arg2)
 382 {
 383         const struct zebra_pbr_iptable *r1, *r2;
 384
 385         r1 = (const struct zebra_pbr_iptable *)arg1;
 386         r2 = (const struct zebra_pbr_iptable *)arg2;
 387
 388         if (r1->vrf_id != r2->vrf_id)
 389                 return false;
 390         if (r1->type != r2->type)
 391                 return false;
 392         if (r1->unique != r2->unique)
 393                 return false;
 394         if (r1->filter_bm != r2->filter_bm)
 395                 return false;
 396         if (r1->fwmark != r2->fwmark)
 397                 return false;
 398         if (r1->action != r2->action)
 399                 return false;
 400         if (strncmp(r1->ipset_name, r2->ipset_name,
 401                     ZEBRA_IPSET_NAME_SIZE))
 402                 return false;
 403         if (r1->pkt_len_min != r2->pkt_len_min)
 404                 return false;
 405         if (r1->pkt_len_max != r2->pkt_len_max)
 406                 return false;
 407         if (r1->tcp_flags != r2->tcp_flags)
 408                 return false;
 409         if (r1->tcp_mask_flags != r2->tcp_mask_flags)
 410                 return false;
 411         if (r1->dscp_value != r2->dscp_value)
 412                 return false;
 413         if (r1->fragment != r2->fragment)
 414                 return false;
 415         if (r1->protocol != r2->protocol)
 416                 return false;
 417         return true;
 418 }
 419
 420 static void *pbr_rule_alloc_intern(void *arg)
 421 {
 422         struct zebra_pbr_rule *zpr;
 423         struct zebra_pbr_rule *new;
 424
 425         zpr = (struct zebra_pbr_rule *)arg;
 426
 427         new = XCALLOC(MTYPE_TMP, sizeof(*new));
 428
 429         memcpy(new, zpr, sizeof(*zpr));
 430
 431         return new;
 432 }
 433
 434 void zebra_pbr_add_rule(struct zebra_pbr_rule *rule)
 435 {
 436         struct zebra_pbr_rule *unique =
 437                 pbr_rule_lookup_unique(rule);
 438
 439         (void)hash_get(zrouter.rules_hash, rule, pbr_rule_alloc_intern);
 440         (void)kernel_add_pbr_rule(rule);
 441         /*
 442          * Rule Replace semantics, if we have an old, install the
 443          * new rule, look above, and then delete the old
 444          */
 445         if (unique)
 446                 zebra_pbr_del_rule(unique);
 447 }
 448
 449 void zebra_pbr_del_rule(struct zebra_pbr_rule *rule)
 450 {
 451         struct zebra_pbr_rule *lookup;
 452
 453         lookup = hash_lookup(zrouter.rules_hash, rule);
 454         (void)kernel_del_pbr_rule(rule);
 455
 456         if (lookup) {
 457                 hash_release(zrouter.rules_hash, lookup);
 458                 XFREE(MTYPE_TMP, lookup);
 459         } else
 460                 zlog_debug("%s: Rule being deleted we know nothing about",
 461                            __PRETTY_FUNCTION__);
 462 }
 463
 464 static void zebra_pbr_cleanup_rules(struct hash_bucket *b, void *data)
 465 {
 466         struct zebra_pbr_rule *rule = b->data;
 467         int *sock = data;
 468
 469         if (rule->sock == *sock) {
 470                 (void)kernel_del_pbr_rule(rule);
 471                 if (hash_release(zrouter.rules_hash, rule))
 472                         XFREE(MTYPE_TMP, rule);
 473                 else
 474                         zlog_debug(
 475                                 "%s: Rule seq: %u is being cleaned but we can't find it in our tables",
 476                                 __func__, rule->rule.seq);
 477         }
 478 }
 479
 480 static void zebra_pbr_cleanup_ipset(struct hash_bucket *b, void *data)
 481 {
 482         struct zebra_pbr_ipset *ipset = b->data;
 483         int *sock = data;
 484
 485         if (ipset->sock == *sock) {
 486                 hook_call(zebra_pbr_ipset_update, 0, ipset);
 487                 hash_release(zrouter.ipset_hash, ipset);
 488         }
 489 }
 490
 491 static void zebra_pbr_cleanup_ipset_entry(struct hash_bucket *b, void *data)
 492 {
 493         struct zebra_pbr_ipset_entry *ipset = b->data;
 494         int *sock = data;
 495
 496         if (ipset->sock == *sock) {
 497                 hook_call(zebra_pbr_ipset_entry_update, 0, ipset);
 498                 hash_release(zrouter.ipset_entry_hash, ipset);
 499         }
 500 }
 501
 502 static void zebra_pbr_cleanup_iptable(struct hash_bucket *b, void *data)
 503 {
 504         struct zebra_pbr_iptable *iptable = b->data;
 505         int *sock = data;
 506
 507         if (iptable->sock == *sock) {
 508                 hook_call(zebra_pbr_iptable_update, 0, iptable);
 509                 hash_release(zrouter.iptable_hash, iptable);
 510         }
 511 }
 512
 513 static int zebra_pbr_client_close_cleanup(struct zserv *client)
 514 {
 515         int sock = client->sock;
 516
 517         if (!sock)
 518                 return 0;
 519         hash_iterate(zrouter.rules_hash, zebra_pbr_cleanup_rules, &sock);
 520         hash_iterate(zrouter.iptable_hash, zebra_pbr_cleanup_iptable, &sock);
 521         hash_iterate(zrouter.ipset_entry_hash, zebra_pbr_cleanup_ipset_entry,
 522                      &sock);
 523         hash_iterate(zrouter.ipset_hash, zebra_pbr_cleanup_ipset, &sock);
 524         return 1;
 525 }
 526
 527 void zebra_pbr_init(void)
 528 {
 529         hook_register(zserv_client_close, zebra_pbr_client_close_cleanup);
 530 }
 531
 532 static void *pbr_ipset_alloc_intern(void *arg)
 533 {
 534         struct zebra_pbr_ipset *zpi;
 535         struct zebra_pbr_ipset *new;
 536
 537         zpi = (struct zebra_pbr_ipset *)arg;
 538
 539         new = XCALLOC(MTYPE_TMP, sizeof(struct zebra_pbr_ipset));
 540
 541         memcpy(new, zpi, sizeof(*zpi));
 542
 543         return new;
 544 }
 545
 546 void zebra_pbr_create_ipset(struct zebra_pbr_ipset *ipset)
 547 {
 548         int ret;
 549
 550         (void)hash_get(zrouter.ipset_hash, ipset, pbr_ipset_alloc_intern);
 551         ret = hook_call(zebra_pbr_ipset_update, 1, ipset);
 552         kernel_pbr_ipset_add_del_status(ipset,
 553                                         ret ? ZEBRA_DPLANE_INSTALL_SUCCESS
 554                                         : ZEBRA_DPLANE_INSTALL_FAILURE);
 555 }
 556
 557 void zebra_pbr_destroy_ipset(struct zebra_pbr_ipset *ipset)
 558 {
 559         struct zebra_pbr_ipset *lookup;
 560
 561         lookup = hash_lookup(zrouter.ipset_hash, ipset);
 562         hook_call(zebra_pbr_ipset_update, 0, ipset);
 563         if (lookup) {
 564                 hash_release(zrouter.ipset_hash, lookup);
 565                 XFREE(MTYPE_TMP, lookup);
 566         } else
 567                 zlog_debug(
 568                         "%s: IPSet Entry being deleted we know nothing about",
 569                         __PRETTY_FUNCTION__);
 570 }
 571
 572 struct pbr_ipset_name_lookup {
 573         struct zebra_pbr_ipset *ipset;
 574         char ipset_name[ZEBRA_IPSET_NAME_SIZE];
 575 };
 576
 577 const char *zebra_pbr_ipset_type2str(uint32_t type)
 578 {
 579         return lookup_msg(ipset_type_msg, type,
 580                           "Unrecognized IPset Type");
 581 }
 582
 583 static int zebra_pbr_ipset_pername_walkcb(struct hash_bucket *bucket, void *arg)
 584 {
 585         struct pbr_ipset_name_lookup *pinl =
 586                 (struct pbr_ipset_name_lookup *)arg;
 587         struct zebra_pbr_ipset *zpi = (struct zebra_pbr_ipset *)bucket->data;
 588
 589         if (!strncmp(pinl->ipset_name, zpi->ipset_name,
 590                      ZEBRA_IPSET_NAME_SIZE)) {
 591                 pinl->ipset = zpi;
 592                 return HASHWALK_ABORT;
 593         }
 594         return HASHWALK_CONTINUE;
 595 }
 596
 597 struct zebra_pbr_ipset *zebra_pbr_lookup_ipset_pername(char *ipsetname)
 598 {
 599         struct pbr_ipset_name_lookup pinl;
 600         struct pbr_ipset_name_lookup *ptr = &pinl;
 601
 602         if (!ipsetname)
 603                 return NULL;
 604         memset(ptr, 0, sizeof(struct pbr_ipset_name_lookup));
 605         snprintf((char *)ptr->ipset_name, ZEBRA_IPSET_NAME_SIZE, "%s",
 606                 ipsetname);
 607         hash_walk(zrouter.ipset_hash, zebra_pbr_ipset_pername_walkcb, ptr);
 608         return ptr->ipset;
 609 }
 610
 611 static void *pbr_ipset_entry_alloc_intern(void *arg)
 612 {
 613         struct zebra_pbr_ipset_entry *zpi;
 614         struct zebra_pbr_ipset_entry *new;
 615
 616         zpi = (struct zebra_pbr_ipset_entry *)arg;
 617
 618         new = XCALLOC(MTYPE_TMP, sizeof(struct zebra_pbr_ipset_entry));
 619
 620         memcpy(new, zpi, sizeof(*zpi));
 621
 622         return new;
 623 }
 624
 625 void zebra_pbr_add_ipset_entry(struct zebra_pbr_ipset_entry *ipset)
 626 {
 627         int ret;
 628
 629         (void)hash_get(zrouter.ipset_entry_hash, ipset,
 630                        pbr_ipset_entry_alloc_intern);
 631         ret = hook_call(zebra_pbr_ipset_entry_update, 1, ipset);
 632         kernel_pbr_ipset_entry_add_del_status(ipset,
 633                                         ret ? ZEBRA_DPLANE_INSTALL_SUCCESS
 634                                         : ZEBRA_DPLANE_INSTALL_FAILURE);
 635 }
 636
 637 void zebra_pbr_del_ipset_entry(struct zebra_pbr_ipset_entry *ipset)
 638 {
 639         struct zebra_pbr_ipset_entry *lookup;
 640
 641         lookup = hash_lookup(zrouter.ipset_entry_hash, ipset);
 642         hook_call(zebra_pbr_ipset_entry_update, 0, ipset);
 643         if (lookup) {
 644                 hash_release(zrouter.ipset_entry_hash, lookup);
 645                 XFREE(MTYPE_TMP, lookup);
 646         } else
 647                 zlog_debug("%s: IPSet being deleted we know nothing about",
 648                            __PRETTY_FUNCTION__);
 649 }
 650
 651 static void *pbr_iptable_alloc_intern(void *arg)
 652 {
 653         struct zebra_pbr_iptable *zpi;
 654         struct zebra_pbr_iptable *new;
 655
 656         zpi = (struct zebra_pbr_iptable *)arg;
 657
 658         new = XCALLOC(MTYPE_TMP, sizeof(struct zebra_pbr_iptable));
 659
 660         memcpy(new, zpi, sizeof(*zpi));
 661
 662         return new;
 663 }
 664
 665 void zebra_pbr_add_iptable(struct zebra_pbr_iptable *iptable)
 666 {
 667         int ret;
 668
 669         (void)hash_get(zrouter.iptable_hash, iptable, pbr_iptable_alloc_intern);
 670         ret = hook_call(zebra_pbr_iptable_update, 1, iptable);
 671         kernel_pbr_iptable_add_del_status(iptable,
 672                                           ret ? ZEBRA_DPLANE_INSTALL_SUCCESS
 673                                           : ZEBRA_DPLANE_INSTALL_FAILURE);
 674 }
 675
 676 void zebra_pbr_del_iptable(struct zebra_pbr_iptable *iptable)
 677 {
 678         struct zebra_pbr_iptable *lookup;
 679
 680         lookup = hash_lookup(zrouter.iptable_hash, iptable);
 681         hook_call(zebra_pbr_iptable_update, 0, iptable);
 682         if (lookup) {
 683                 struct listnode *node, *nnode;
 684                 char *name;
 685
 686                 hash_release(zrouter.iptable_hash, lookup);
 687                 for (ALL_LIST_ELEMENTS(iptable->interface_name_list,
 688                                        node, nnode, name)) {
 689                         XFREE(MTYPE_PBR_IPTABLE_IFNAME, name);
 690                         list_delete_node(iptable->interface_name_list,
 691                                          node);
 692                 }
 693                 list_delete(&iptable->interface_name_list);
 694                 XFREE(MTYPE_TMP, lookup);
 695         } else
 696                 zlog_debug("%s: IPTable being deleted we know nothing about",
 697                            __PRETTY_FUNCTION__);
 698 }
 699
 700 /*
 701  * Handle success or failure of rule (un)install in the kernel.
 702  */
 703 void kernel_pbr_rule_add_del_status(struct zebra_pbr_rule *rule,
 704                                     enum zebra_dplane_status res)
 705 {
 706         switch (res) {
 707         case ZEBRA_DPLANE_INSTALL_SUCCESS:
 708                 zsend_rule_notify_owner(rule, ZAPI_RULE_INSTALLED);
 709                 break;
 710         case ZEBRA_DPLANE_INSTALL_FAILURE:
 711                 zsend_rule_notify_owner(rule, ZAPI_RULE_FAIL_INSTALL);
 712                 break;
 713         case ZEBRA_DPLANE_DELETE_SUCCESS:
 714                 zsend_rule_notify_owner(rule, ZAPI_RULE_REMOVED);
 715                 break;
 716         case ZEBRA_DPLANE_DELETE_FAILURE:
 717                 zsend_rule_notify_owner(rule, ZAPI_RULE_FAIL_REMOVE);
 718                 break;
 719         case ZEBRA_DPLANE_STATUS_NONE:
 720                 break;
 721         }
 722 }
 723
 724 /*
 725  * Handle success or failure of ipset (un)install in the kernel.
 726  */
 727 void kernel_pbr_ipset_add_del_status(struct zebra_pbr_ipset *ipset,
 728                                     enum zebra_dplane_status res)
 729 {
 730         switch (res) {
 731         case ZEBRA_DPLANE_INSTALL_SUCCESS:
 732                 zsend_ipset_notify_owner(ipset, ZAPI_IPSET_INSTALLED);
 733                 break;
 734         case ZEBRA_DPLANE_INSTALL_FAILURE:
 735                 zsend_ipset_notify_owner(ipset, ZAPI_IPSET_FAIL_INSTALL);
 736                 break;
 737         case ZEBRA_DPLANE_DELETE_SUCCESS:
 738                 zsend_ipset_notify_owner(ipset, ZAPI_IPSET_REMOVED);
 739                 break;
 740         case ZEBRA_DPLANE_DELETE_FAILURE:
 741                 zsend_ipset_notify_owner(ipset, ZAPI_IPSET_FAIL_REMOVE);
 742                 break;
 743         case ZEBRA_DPLANE_STATUS_NONE:
 744                 break;
 745         }
 746 }
 747
 748 /*
 749  * Handle success or failure of ipset (un)install in the kernel.
 750  */
 751 void kernel_pbr_ipset_entry_add_del_status(
 752                         struct zebra_pbr_ipset_entry *ipset,
 753                         enum zebra_dplane_status res)
 754 {
 755         switch (res) {
 756         case ZEBRA_DPLANE_INSTALL_SUCCESS:
 757                 zsend_ipset_entry_notify_owner(ipset,
 758                                                ZAPI_IPSET_ENTRY_INSTALLED);
 759                 break;
 760         case ZEBRA_DPLANE_INSTALL_FAILURE:
 761                 zsend_ipset_entry_notify_owner(ipset,
 762                                                ZAPI_IPSET_ENTRY_FAIL_INSTALL);
 763                 break;
 764         case ZEBRA_DPLANE_DELETE_SUCCESS:
 765                 zsend_ipset_entry_notify_owner(ipset,
 766                                                ZAPI_IPSET_ENTRY_REMOVED);
 767                 break;
 768         case ZEBRA_DPLANE_DELETE_FAILURE:
 769                 zsend_ipset_entry_notify_owner(ipset,
 770                                                ZAPI_IPSET_ENTRY_FAIL_REMOVE);
 771                 break;
 772         case ZEBRA_DPLANE_STATUS_NONE:
 773                 break;
 774         }
 775 }
 776
 777 /*
 778  * Handle success or failure of ipset (un)install in the kernel.
 779  */
 780 void kernel_pbr_iptable_add_del_status(struct zebra_pbr_iptable *iptable,
 781                                        enum zebra_dplane_status res)
 782 {
 783         switch (res) {
 784         case ZEBRA_DPLANE_INSTALL_SUCCESS:
 785                 zsend_iptable_notify_owner(iptable, ZAPI_IPTABLE_INSTALLED);
 786                 break;
 787         case ZEBRA_DPLANE_INSTALL_FAILURE:
 788                 zsend_iptable_notify_owner(iptable, ZAPI_IPTABLE_FAIL_INSTALL);
 789                 break;
 790         case ZEBRA_DPLANE_DELETE_SUCCESS:
 791                 zsend_iptable_notify_owner(iptable,
 792                                            ZAPI_IPTABLE_REMOVED);
 793                 break;
 794         case ZEBRA_DPLANE_DELETE_FAILURE:
 795                 zsend_iptable_notify_owner(iptable,
 796                                            ZAPI_IPTABLE_FAIL_REMOVE);
 797                 break;
 798         case ZEBRA_DPLANE_STATUS_NONE:
 799                 break;
 800         }
 801 }
 802
 803 /*
 804  * Handle rule delete notification from kernel.
 805  */
 806 int kernel_pbr_rule_del(struct zebra_pbr_rule *rule)
 807 {
 808         return 0;
 809 }
 810
 811 struct zebra_pbr_ipset_entry_unique_display {
 812         struct zebra_pbr_ipset *zpi;
 813         struct vty *vty;
 814         struct zebra_ns *zns;
 815 };
 816
 817 struct zebra_pbr_env_display {
 818         struct zebra_ns *zns;
 819         struct vty *vty;
 820         char *name;
 821 };
 822
 823 static const char *zebra_pbr_prefix2str(union prefixconstptr pu,
 824                                         char *str, int size)
 825 {
 826         const struct prefix *p = pu.p;
 827         char buf[PREFIX2STR_BUFFER];
 828
 829         if (p->family == AF_INET && p->prefixlen == IPV4_MAX_PREFIXLEN) {
 830                 snprintf(str, size, "%s", inet_ntop(p->family, &p->u.prefix,
 831                                                     buf, PREFIX2STR_BUFFER));
 832                 return str;
 833         }
 834         return prefix2str(pu, str, size);
 835 }
 836
 837 static void zebra_pbr_display_icmp(struct vty *vty,
 838                                    struct zebra_pbr_ipset_entry *zpie)
 839 {
 840         char decoded_str[20];
 841         uint16_t port;
 842
 843         /* range icmp type */
 844         if (zpie->src_port_max || zpie->dst_port_max) {
 845                 vty_out(vty, ":icmp:[type <%d:%d>;code <%d:%d>",
 846                         zpie->src_port_min, zpie->src_port_max,
 847                         zpie->dst_port_min, zpie->dst_port_max);
 848         } else {
 849                 port = ((zpie->src_port_min << 8) & 0xff00) +
 850                         (zpie->dst_port_min & 0xff);
 851                 memset(decoded_str, 0, sizeof(decoded_str));
 852                 sprintf(decoded_str, "%d/%d",
 853                         zpie->src_port_min,
 854                         zpie->dst_port_min);
 855                 vty_out(vty, ":icmp:%s",
 856                         lookup_msg(icmp_typecode_str,
 857                                    port, decoded_str));
 858         }
 859 }
 860
 861 static void zebra_pbr_display_port(struct vty *vty, uint32_t filter_bm,
 862                             uint16_t port_min, uint16_t port_max,
 863                             uint8_t proto)
 864 {
 865         if (!(filter_bm & PBR_FILTER_PROTO)) {
 866                 if (port_max)
 867                         vty_out(vty, ":udp/tcp:%d-%d",
 868                                 port_min, port_max);
 869                 else
 870                         vty_out(vty, ":udp/tcp:%d",
 871                                 port_min);
 872         } else {
 873                 if (port_max)
 874                         vty_out(vty, ":proto %d:%d-%d",
 875                                 proto, port_min, port_max);
 876                 else
 877                         vty_out(vty, ":proto %d:%d",
 878                                 proto, port_min);
 879         }
 880 }
 881
 882 static int zebra_pbr_show_ipset_entry_walkcb(struct hash_bucket *bucket,
 883                                              void *arg)
 884 {
 885         struct zebra_pbr_ipset_entry_unique_display *unique =
 886                 (struct zebra_pbr_ipset_entry_unique_display *)arg;
 887         struct zebra_pbr_ipset *zpi = unique->zpi;
 888         struct vty *vty = unique->vty;
 889         struct zebra_pbr_ipset_entry *zpie =
 890                 (struct zebra_pbr_ipset_entry *)bucket->data;
 891         uint64_t pkts = 0, bytes = 0;
 892         int ret = 0;
 893
 894         if (zpie->backpointer != zpi)
 895                 return HASHWALK_CONTINUE;
 896
 897         if ((zpi->type == IPSET_NET_NET) ||
 898             (zpi->type == IPSET_NET_PORT_NET)) {
 899                 char buf[PREFIX_STRLEN];
 900
 901                 zebra_pbr_prefix2str(&(zpie->src), buf, sizeof(buf));
 902                 vty_out(vty, "\tfrom %s", buf);
 903                 if (zpie->filter_bm & PBR_FILTER_SRC_PORT &&
 904                     zpie->proto != IPPROTO_ICMP)
 905                         zebra_pbr_display_port(vty, zpie->filter_bm,
 906                                                zpie->src_port_min,
 907                                                zpie->src_port_max,
 908                                                zpie->proto);
 909                 vty_out(vty, " to ");
 910                 zebra_pbr_prefix2str(&(zpie->dst), buf, sizeof(buf));
 911                 vty_out(vty, "%s", buf);
 912                 if (zpie->filter_bm & PBR_FILTER_DST_PORT &&
 913                     zpie->proto != IPPROTO_ICMP)
 914                         zebra_pbr_display_port(vty, zpie->filter_bm,
 915                                                zpie->dst_port_min,
 916                                                zpie->dst_port_max,
 917                                                zpie->proto);
 918                 if (zpie->proto == IPPROTO_ICMP)
 919                         zebra_pbr_display_icmp(vty, zpie);
 920         } else if ((zpi->type == IPSET_NET) ||
 921                    (zpi->type == IPSET_NET_PORT)) {
 922                 char buf[PREFIX_STRLEN];
 923
 924                 if (zpie->filter_bm & PBR_FILTER_SRC_IP) {
 925                         zebra_pbr_prefix2str(&(zpie->src), buf, sizeof(buf));
 926                         vty_out(vty, "\tfrom %s", buf);
 927                 }
 928                 if (zpie->filter_bm & PBR_FILTER_SRC_PORT &&
 929                     zpie->proto != IPPROTO_ICMP)
 930                         zebra_pbr_display_port(vty, zpie->filter_bm,
 931                                                zpie->src_port_min,
 932                                                zpie->src_port_max,
 933                                                zpie->proto);
 934                 if (zpie->filter_bm & PBR_FILTER_DST_IP) {
 935                         zebra_pbr_prefix2str(&(zpie->dst), buf, sizeof(buf));
 936                         vty_out(vty, "\tto %s", buf);
 937                 }
 938                 if (zpie->filter_bm & PBR_FILTER_DST_PORT &&
 939                     zpie->proto != IPPROTO_ICMP)
 940                         zebra_pbr_display_port(vty, zpie->filter_bm,
 941                                                zpie->dst_port_min,
 942                                                zpie->dst_port_max,
 943                                                zpie->proto);
 944                 if (zpie->proto == IPPROTO_ICMP)
 945                         zebra_pbr_display_icmp(vty, zpie);
 946         }
 947         vty_out(vty, " (%u)\n", zpie->unique);
 948
 949         ret = hook_call(zebra_pbr_ipset_entry_get_stat, zpie, &pkts,
 950                         &bytes);
 951         if (ret && pkts > 0)
 952                 vty_out(vty, "\t pkts %" PRIu64 ", bytes %" PRIu64"\n",
 953                         pkts, bytes);
 954         return HASHWALK_CONTINUE;
 955 }
 956
 957 static int zebra_pbr_show_ipset_walkcb(struct hash_bucket *bucket, void *arg)
 958 {
 959         struct zebra_pbr_env_display *uniqueipset =
 960                 (struct zebra_pbr_env_display *)arg;
 961         struct zebra_pbr_ipset *zpi = (struct zebra_pbr_ipset *)bucket->data;
 962         struct zebra_pbr_ipset_entry_unique_display unique;
 963         struct vty *vty = uniqueipset->vty;
 964         struct zebra_ns *zns = uniqueipset->zns;
 965
 966         vty_out(vty, "IPset %s type %s\n", zpi->ipset_name,
 967                 zebra_pbr_ipset_type2str(zpi->type));
 968         unique.vty = vty;
 969         unique.zpi = zpi;
 970         unique.zns = zns;
 971         hash_walk(zrouter.ipset_entry_hash, zebra_pbr_show_ipset_entry_walkcb,
 972                   &unique);
 973         vty_out(vty, "\n");
 974         return HASHWALK_CONTINUE;
 975 }
 976
 977 size_t zebra_pbr_tcpflags_snprintf(char *buffer, size_t len,
 978                                    uint16_t tcp_val)
 979 {
 980         size_t len_written = 0;
 981         static struct message nt = {0};
 982         const struct message *pnt;
 983         int incr = 0;
 984
 985         for (pnt = tcp_value_str;
 986              memcmp(pnt, &nt, sizeof(struct message)); pnt++)
 987                 if (pnt->key & tcp_val) {
 988                         len_written += snprintf(buffer + len_written,
 989                                                 len - len_written,
 990                                                 "%s%s", incr ?
 991                                                 ",":"", pnt->str);
 992                         incr++;
 993                 }
 994         return len_written;
 995 }
 996
 997 /*
 998  */
 999 void zebra_pbr_show_ipset_list(struct vty *vty, char *ipsetname)
1000 {
1001         struct zebra_pbr_ipset *zpi;
1002         struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT);
1003         struct zebra_pbr_ipset_entry_unique_display unique;
1004         struct zebra_pbr_env_display uniqueipset;
1005
1006         if (ipsetname) {
1007                 zpi = zebra_pbr_lookup_ipset_pername(ipsetname);
1008                 if (!zpi) {
1009                         vty_out(vty, "No IPset %s found\n", ipsetname);
1010                         return;
1011                 }
1012                 vty_out(vty, "IPset %s type %s\n", ipsetname,
1013                         zebra_pbr_ipset_type2str(zpi->type));
1014
1015                 unique.vty = vty;
1016                 unique.zpi = zpi;
1017                 unique.zns = zns;
1018                 hash_walk(zrouter.ipset_entry_hash,
1019                           zebra_pbr_show_ipset_entry_walkcb, &unique);
1020                 return;
1021         }
1022         uniqueipset.zns = zns;
1023         uniqueipset.vty = vty;
1024         uniqueipset.name = NULL;
1025         hash_walk(zrouter.ipset_hash, zebra_pbr_show_ipset_walkcb,
1026                   &uniqueipset);
1027 }
1028
1029 struct pbr_rule_fwmark_lookup {
1030         struct zebra_pbr_rule *ptr;
1031         uint32_t fwmark;
1032 };
1033
1034 static int zebra_pbr_rule_lookup_fwmark_walkcb(struct hash_bucket *bucket,
1035                                                void *arg)
1036 {
1037         struct pbr_rule_fwmark_lookup *iprule =
1038                 (struct pbr_rule_fwmark_lookup *)arg;
1039         struct zebra_pbr_rule *zpr = (struct zebra_pbr_rule *)bucket->data;
1040
1041         if (iprule->fwmark == zpr->rule.filter.fwmark) {
1042                 iprule->ptr = zpr;
1043                 return HASHWALK_ABORT;
1044         }
1045         return HASHWALK_CONTINUE;
1046 }
1047
1048 static void zebra_pbr_show_iptable_unit(struct zebra_pbr_iptable *iptable,
1049                                        struct vty *vty,
1050                                        struct zebra_ns *zns)
1051 {
1052         int ret;
1053         uint64_t pkts = 0, bytes = 0;
1054
1055         vty_out(vty, "IPtable %s action %s (%u)\n", iptable->ipset_name,
1056                 iptable->action == ZEBRA_IPTABLES_DROP ? "drop" : "redirect",
1057                 iptable->unique);
1058         if (iptable->type == IPSET_NET_PORT ||
1059             iptable->type == IPSET_NET_PORT_NET) {
1060                 if (!(iptable->filter_bm & MATCH_ICMP_SET)) {
1061                         if (iptable->filter_bm & PBR_FILTER_DST_PORT)
1062                                 vty_out(vty, "\t lookup dst port\n");
1063                         else if (iptable->filter_bm & PBR_FILTER_SRC_PORT)
1064                                 vty_out(vty, "\t lookup src port\n");
1065                 }
1066         }
1067         if (iptable->pkt_len_min || iptable->pkt_len_max) {
1068                 if (!iptable->pkt_len_max)
1069                         vty_out(vty, "\t pkt len %u\n",
1070                                 iptable->pkt_len_min);
1071                 else
1072                         vty_out(vty, "\t pkt len [%u;%u]\n",
1073                                 iptable->pkt_len_min,
1074                                 iptable->pkt_len_max);
1075         }
1076         if (iptable->tcp_flags || iptable->tcp_mask_flags) {
1077                 char tcp_flag_str[64];
1078                 char tcp_flag_mask_str[64];
1079
1080                 zebra_pbr_tcpflags_snprintf(tcp_flag_str,
1081                                             sizeof(tcp_flag_str),
1082                                             iptable->tcp_flags);
1083                 zebra_pbr_tcpflags_snprintf(tcp_flag_mask_str,
1084                                             sizeof(tcp_flag_mask_str),
1085                                             iptable->tcp_mask_flags);
1086                 vty_out(vty, "\t tcpflags [%s/%s]\n",
1087                         tcp_flag_str, tcp_flag_mask_str);
1088         }
1089         if (iptable->filter_bm & (MATCH_DSCP_SET | MATCH_DSCP_INVERSE_SET)) {
1090                 vty_out(vty, "\t dscp %s %d\n",
1091                         iptable->filter_bm & MATCH_DSCP_INVERSE_SET ?
1092                         "not" : "", iptable->dscp_value);
1093         }
1094         if (iptable->fragment) {
1095                 char val_str[10];
1096
1097                 sprintf(val_str, "%d", iptable->fragment);
1098                 vty_out(vty, "\t fragment%s %s\n",
1099                         iptable->filter_bm & MATCH_FRAGMENT_INVERSE_SET ?
1100                         " not" : "", lookup_msg(fragment_value_str,
1101                                                iptable->fragment, val_str));
1102         }
1103         if (iptable->protocol) {
1104                 vty_out(vty, "\t protocol %d\n",
1105                         iptable->protocol);
1106         }
1107         ret = hook_call(zebra_pbr_iptable_get_stat, iptable, &pkts,
1108                         &bytes);
1109         if (ret && pkts > 0)
1110                 vty_out(vty, "\t pkts %" PRIu64 ", bytes %" PRIu64"\n",
1111                         pkts, bytes);
1112         if (iptable->action != ZEBRA_IPTABLES_DROP) {
1113                 struct pbr_rule_fwmark_lookup prfl;
1114
1115                 prfl.fwmark = iptable->fwmark;
1116                 prfl.ptr = NULL;
1117                 hash_walk(zrouter.rules_hash,
1118                           &zebra_pbr_rule_lookup_fwmark_walkcb, &prfl);
1119                 if (prfl.ptr) {
1120                         struct zebra_pbr_rule *zpr = prfl.ptr;
1121
1122                         vty_out(vty, "\t table %u, fwmark %u\n",
1123                                 zpr->rule.action.table,
1124                                 prfl.fwmark);
1125                 }
1126         }
1127 }
1128
1129 static int zebra_pbr_show_iptable_walkcb(struct hash_bucket *bucket, void *arg)
1130 {
1131         struct zebra_pbr_iptable *iptable =
1132                 (struct zebra_pbr_iptable *)bucket->data;
1133         struct zebra_pbr_env_display *env = (struct zebra_pbr_env_display *)arg;
1134         struct vty *vty = env->vty;
1135         struct zebra_ns *zns = env->zns;
1136         char *iptable_name = env->name;
1137
1138         if (!iptable_name)
1139                 zebra_pbr_show_iptable_unit(iptable, vty, zns);
1140         else if (!strncmp(iptable_name,
1141                           iptable->ipset_name,
1142                           ZEBRA_IPSET_NAME_SIZE))
1143                 zebra_pbr_show_iptable_unit(iptable, vty, zns);
1144         return HASHWALK_CONTINUE;
1145 }
1146
1147 void zebra_pbr_show_iptable(struct vty *vty, char *iptable_name)
1148 {
1149         struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT);
1150         struct zebra_pbr_env_display env;
1151
1152         env.vty = vty;
1153         env.zns = zns;
1154         env.name = iptable_name;
1155         hash_walk(zrouter.iptable_hash, zebra_pbr_show_iptable_walkcb, &env);
1156 }
1157
1158 void zebra_pbr_iptable_update_interfacelist(struct stream *s,
1159                                             struct zebra_pbr_iptable *zpi)
1160 {
1161         uint32_t i = 0, index;
1162         struct interface *ifp;
1163         char *name;
1164
1165         for (i = 0; i < zpi->nb_interface; i++) {
1166                 STREAM_GETL(s, index);
1167                 ifp = if_lookup_by_index(index, zpi->vrf_id);
1168                 if (!ifp)
1169                         continue;
1170                 name = XSTRDUP(MTYPE_PBR_IPTABLE_IFNAME, ifp->name);
1171                 listnode_add(zpi->interface_name_list, name);
1172         }
1173 stream_failure:
1174         return;
1175 }