isisd/isis_tlvs.h

   1 /*
   2  * IS-IS TLV Serializer/Deserializer
   3  *
   4  * Copyright (C) 2015,2017 Christian Franke
   5
   6  * Copyright (C) 2019 Olivier Dugeon - Orange Labs (for TE and SR)
   7  *
   8  * This file is part of FRR.
   9  *
  10  * FRR is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the
  12  * Free Software Foundation; either version 2, or (at your option) any
  13  * later version.
  14  *
  15  * FRR is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with FRR; see the file COPYING.  If not, write to the Free
  22  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  23  * 02111-1307, USA.
  24  */
  25 #ifndef ISIS_TLVS_H
  26 #define ISIS_TLVS_H
  27
  28 #include "openbsd-tree.h"
  29 #include "prefix.h"
  30
  31 DECLARE_MTYPE(ISIS_SUBTLV);
  32
  33 struct lspdb_head;
  34 struct sr_prefix_cfg;
  35
  36 struct isis_area_address {
  37         struct isis_area_address *next;
  38
  39         uint8_t addr[20];
  40         uint8_t len;
  41 };
  42
  43 #define ISIS_WIDE_METRIC_INFINITY   0xFFFFFE
  44 #define ISIS_NARROW_METRIC_INFINITY 62
  45
  46 struct isis_oldstyle_reach {
  47         struct isis_oldstyle_reach *next;
  48
  49         uint8_t id[7];
  50         uint8_t metric;
  51 };
  52
  53 struct isis_oldstyle_ip_reach {
  54         struct isis_oldstyle_ip_reach *next;
  55
  56         uint8_t metric;
  57         struct prefix_ipv4 prefix;
  58 };
  59
  60 struct isis_lsp_entry {
  61         struct isis_lsp_entry *next;
  62
  63         uint16_t rem_lifetime;
  64         uint8_t id[8];
  65         uint16_t checksum;
  66         uint32_t seqno;
  67
  68         struct isis_lsp *lsp;
  69 };
  70
  71 struct isis_extended_reach {
  72         struct isis_extended_reach *next;
  73
  74         uint8_t id[7];
  75         uint32_t metric;
  76
  77         struct isis_ext_subtlvs *subtlvs;
  78 };
  79
  80 struct isis_extended_ip_reach {
  81         struct isis_extended_ip_reach *next;
  82
  83         uint32_t metric;
  84         bool down;
  85         struct prefix_ipv4 prefix;
  86
  87         struct isis_subtlvs *subtlvs;
  88 };
  89
  90 struct isis_ipv6_reach {
  91         struct isis_ipv6_reach *next;
  92
  93         uint32_t metric;
  94         bool down;
  95         bool external;
  96
  97         struct prefix_ipv6 prefix;
  98
  99         struct isis_subtlvs *subtlvs;
 100 };
 101
 102 struct isis_protocols_supported {
 103         uint8_t count;
 104         uint8_t *protocols;
 105 };
 106
 107 #define ISIS_TIER_UNDEFINED 15
 108
 109 struct isis_spine_leaf {
 110         uint8_t tier;
 111
 112         bool has_tier;
 113         bool is_leaf;
 114         bool is_spine;
 115         bool is_backup;
 116 };
 117
 118 enum isis_threeway_state {
 119         ISIS_THREEWAY_DOWN = 2,
 120         ISIS_THREEWAY_INITIALIZING = 1,
 121         ISIS_THREEWAY_UP = 0
 122 };
 123
 124 struct isis_threeway_adj {
 125         enum isis_threeway_state state;
 126         uint32_t local_circuit_id;
 127         bool neighbor_set;
 128         uint8_t neighbor_id[6];
 129         uint32_t neighbor_circuit_id;
 130 };
 131
 132 /* Segment Routing subTLV's as per RFC8667 */
 133 #define ISIS_SUBTLV_SRGB_FLAG_I         0x80
 134 #define ISIS_SUBTLV_SRGB_FLAG_V         0x40
 135 #define IS_SR_IPV4(srgb)               ((srgb)->flags & ISIS_SUBTLV_SRGB_FLAG_I)
 136 #define IS_SR_IPV6(srgb)               ((srgb)->flags & ISIS_SUBTLV_SRGB_FLAG_V)
 137 #define SUBTLV_SR_BLOCK_SIZE            6
 138 #define SUBTLV_RANGE_INDEX_SIZE         10
 139 #define SUBTLV_RANGE_LABEL_SIZE         9
 140
 141 /* Structure aggregating SR Global (SRGB) or Local (SRLB) Block info */
 142 struct isis_sr_block {
 143         uint8_t flags;
 144         uint32_t range_size;
 145         uint32_t lower_bound;
 146 };
 147
 148 /* Prefix-SID sub-TLVs flags */
 149 #define ISIS_PREFIX_SID_READVERTISED  0x80
 150 #define ISIS_PREFIX_SID_NODE          0x40
 151 #define ISIS_PREFIX_SID_NO_PHP        0x20
 152 #define ISIS_PREFIX_SID_EXPLICIT_NULL 0x10
 153 #define ISIS_PREFIX_SID_VALUE         0x08
 154 #define ISIS_PREFIX_SID_LOCAL         0x04
 155
 156 struct isis_prefix_sid {
 157         struct isis_prefix_sid *next;
 158
 159         uint8_t flags;
 160         uint8_t algorithm;
 161         uint32_t value;
 162 };
 163
 164 /* Adj-SID and LAN-Ajd-SID sub-TLVs flags */
 165 #define EXT_SUBTLV_LINK_ADJ_SID_FFLG    0x80
 166 #define EXT_SUBTLV_LINK_ADJ_SID_BFLG    0x40
 167 #define EXT_SUBTLV_LINK_ADJ_SID_VFLG    0x20
 168 #define EXT_SUBTLV_LINK_ADJ_SID_LFLG    0x10
 169 #define EXT_SUBTLV_LINK_ADJ_SID_SFLG    0x08
 170 #define EXT_SUBTLV_LINK_ADJ_SID_PFLG    0x04
 171
 172 struct isis_adj_sid {
 173         struct isis_adj_sid *next;
 174
 175         uint8_t family;
 176         uint8_t flags;
 177         uint8_t weight;
 178         uint32_t sid;
 179 };
 180
 181 struct isis_lan_adj_sid {
 182         struct isis_lan_adj_sid *next;
 183
 184         uint8_t family;
 185         uint8_t flags;
 186         uint8_t weight;
 187         uint8_t neighbor_id[ISIS_SYS_ID_LEN];
 188         uint32_t sid;
 189 };
 190
 191 /* RFC 4971 & RFC 7981 */
 192 #define ISIS_ROUTER_CAP_FLAG_S  0x01
 193 #define ISIS_ROUTER_CAP_FLAG_D  0x02
 194 #define ISIS_ROUTER_CAP_SIZE    5
 195
 196 /* Number of supported algorithm for Segment Routing.
 197  * Right now only 2 have been standardized:
 198  *  - 0: SPF
 199  *  - 1: Strict SPF
 200  */
 201 #define SR_ALGORITHM_COUNT      2
 202 #define SR_ALGORITHM_SPF        0
 203 #define SR_ALGORITHM_STRICT_SPF 1
 204 #define SR_ALGORITHM_UNSET      255
 205
 206 #define MSD_TYPE_BASE_MPLS_IMPOSITION  0x01
 207 #define MSD_TLV_SIZE            2
 208
 209 struct isis_router_cap {
 210         struct in_addr router_id;
 211         uint8_t flags;
 212
 213         /* RFC 8667 section #3 */
 214         struct isis_sr_block srgb;
 215         struct isis_sr_block srlb;
 216         uint8_t algo[SR_ALGORITHM_COUNT];
 217         /* RFC 8491 */
 218         uint8_t msd;
 219 };
 220
 221 struct isis_item {
 222         struct isis_item *next;
 223 };
 224
 225 struct isis_lan_neighbor {
 226         struct isis_lan_neighbor *next;
 227
 228         uint8_t mac[6];
 229 };
 230
 231 struct isis_ipv4_address {
 232         struct isis_ipv4_address *next;
 233
 234         struct in_addr addr;
 235 };
 236
 237 struct isis_ipv6_address {
 238         struct isis_ipv6_address *next;
 239
 240         struct in6_addr addr;
 241 };
 242
 243 struct isis_mt_router_info {
 244         struct isis_mt_router_info *next;
 245
 246         bool overload;
 247         bool attached;
 248         uint16_t mtid;
 249 };
 250
 251 struct isis_auth {
 252         struct isis_auth *next;
 253
 254         uint8_t type;
 255         uint8_t length;
 256         uint8_t value[256];
 257
 258         uint8_t plength;
 259         uint8_t passwd[256];
 260
 261         size_t offset; /* Only valid after packing */
 262 };
 263
 264 struct isis_item_list {
 265         struct isis_item *head;
 266         struct isis_item **tail;
 267
 268         RB_ENTRY(isis_item_list) mt_tree;
 269         uint16_t mtid;
 270         unsigned int count;
 271 };
 272
 273 struct isis_purge_originator {
 274         bool sender_set;
 275
 276         uint8_t generator[6];
 277         uint8_t sender[6];
 278 };
 279
 280 enum isis_auth_result {
 281         ISIS_AUTH_OK = 0,
 282         ISIS_AUTH_TYPE_FAILURE,
 283         ISIS_AUTH_FAILURE,
 284         ISIS_AUTH_NO_VALIDATOR,
 285 };
 286
 287 RB_HEAD(isis_mt_item_list, isis_item_list);
 288
 289 struct isis_item_list *isis_get_mt_items(struct isis_mt_item_list *m,
 290                                          uint16_t mtid);
 291 struct isis_item_list *isis_lookup_mt_items(struct isis_mt_item_list *m,
 292                                             uint16_t mtid);
 293
 294 struct isis_tlvs {
 295         struct isis_item_list isis_auth;
 296         struct isis_purge_originator *purge_originator;
 297         struct isis_item_list area_addresses;
 298         struct isis_item_list oldstyle_reach;
 299         struct isis_item_list lan_neighbor;
 300         struct isis_item_list lsp_entries;
 301         struct isis_item_list extended_reach;
 302         struct isis_mt_item_list mt_reach;
 303         struct isis_item_list oldstyle_ip_reach;
 304         struct isis_protocols_supported protocols_supported;
 305         struct isis_item_list oldstyle_ip_reach_ext;
 306         struct isis_item_list ipv4_address;
 307         struct isis_item_list ipv6_address;
 308         struct isis_item_list global_ipv6_address;
 309         struct isis_item_list mt_router_info;
 310         bool mt_router_info_empty;
 311         struct in_addr *te_router_id;
 312         struct in6_addr *te_router_id_ipv6;
 313         struct isis_item_list extended_ip_reach;
 314         struct isis_mt_item_list mt_ip_reach;
 315         char *hostname;
 316         struct isis_item_list ipv6_reach;
 317         struct isis_mt_item_list mt_ipv6_reach;
 318         struct isis_threeway_adj *threeway_adj;
 319         struct isis_router_cap *router_cap;
 320         struct isis_spine_leaf *spine_leaf;
 321 };
 322
 323 enum isis_tlv_context {
 324         ISIS_CONTEXT_LSP,
 325         ISIS_CONTEXT_SUBTLV_NE_REACH,
 326         ISIS_CONTEXT_SUBTLV_IP_REACH,
 327         ISIS_CONTEXT_SUBTLV_IPV6_REACH,
 328         ISIS_CONTEXT_MAX
 329 };
 330
 331 struct isis_subtlvs {
 332         enum isis_tlv_context context;
 333
 334         /* draft-baker-ipv6-isis-dst-src-routing-06 */
 335         struct prefix_ipv6 *source_prefix;
 336         /* RFC 8667 section #2.4 */
 337         struct isis_item_list prefix_sids;
 338 };
 339
 340 enum isis_tlv_type {
 341         /* TLVs code point */
 342         ISIS_TLV_AREA_ADDRESSES = 1,
 343         ISIS_TLV_OLDSTYLE_REACH = 2,
 344         ISIS_TLV_LAN_NEIGHBORS = 6,
 345         ISIS_TLV_PADDING = 8,
 346         ISIS_TLV_LSP_ENTRY = 9,
 347         ISIS_TLV_AUTH = 10,
 348         ISIS_TLV_PURGE_ORIGINATOR = 13,
 349         ISIS_TLV_EXTENDED_REACH = 22,
 350
 351         ISIS_TLV_OLDSTYLE_IP_REACH = 128,
 352         ISIS_TLV_PROTOCOLS_SUPPORTED = 129,
 353         ISIS_TLV_OLDSTYLE_IP_REACH_EXT = 130,
 354         ISIS_TLV_IPV4_ADDRESS = 132,
 355         ISIS_TLV_TE_ROUTER_ID = 134,
 356         ISIS_TLV_EXTENDED_IP_REACH = 135,
 357         ISIS_TLV_DYNAMIC_HOSTNAME = 137,
 358         ISIS_TLV_TE_ROUTER_ID_IPV6 = 140,
 359         ISIS_TLV_SPINE_LEAF_EXT = 150,
 360         ISIS_TLV_MT_REACH = 222,
 361         ISIS_TLV_MT_ROUTER_INFO = 229,
 362         ISIS_TLV_IPV6_ADDRESS = 232,
 363         ISIS_TLV_GLOBAL_IPV6_ADDRESS = 233,
 364         ISIS_TLV_MT_IP_REACH = 235,
 365         ISIS_TLV_IPV6_REACH = 236,
 366         ISIS_TLV_MT_IPV6_REACH = 237,
 367         ISIS_TLV_THREE_WAY_ADJ = 240,
 368         ISIS_TLV_ROUTER_CAPABILITY = 242,
 369         ISIS_TLV_MAX = 256,
 370
 371         /* subTLVs code point */
 372         ISIS_SUBTLV_IPV6_SOURCE_PREFIX = 22,
 373
 374         /* RFC 5305 & RFC 6119 */
 375         ISIS_SUBTLV_ADMIN_GRP = 3,
 376         ISIS_SUBTLV_LOCAL_IPADDR = 6,
 377         ISIS_SUBTLV_RMT_IPADDR = 8,
 378         ISIS_SUBTLV_MAX_BW = 9,
 379         ISIS_SUBTLV_MAX_RSV_BW = 10,
 380         ISIS_SUBTLV_UNRSV_BW = 11,
 381         ISIS_SUBTLV_LOCAL_IPADDR6 = 12,
 382         ISIS_SUBTLV_RMT_IPADDR6 = 13,
 383         ISIS_SUBTLV_TE_METRIC = 18,
 384
 385         /* RFC 5307 */
 386         ISIS_SUBTLV_LLRI = 4,
 387
 388         /* RFC 8491 */
 389         ISIS_SUBTLV_NODE_MSD = 23,
 390
 391         /* RFC 5316 */
 392         ISIS_SUBTLV_RAS = 24,
 393         ISIS_SUBTLV_RIP = 25,
 394
 395         /* RFC 8667 section #4 IANA allocation */
 396         ISIS_SUBTLV_SID_LABEL = 1,
 397         ISIS_SUBTLV_SID_LABEL_RANGE = 2,
 398         ISIS_SUBTLV_ALGORITHM = 19,
 399         ISIS_SUBTLV_SRLB = 22,
 400         ISIS_SUBTLV_PREFIX_SID = 3,
 401         ISIS_SUBTLV_ADJ_SID = 31,
 402         ISIS_SUBTLV_LAN_ADJ_SID = 32,
 403
 404         /* RFC 7810 */
 405         ISIS_SUBTLV_AV_DELAY = 33,
 406         ISIS_SUBTLV_MM_DELAY = 34,
 407         ISIS_SUBTLV_DELAY_VAR = 35,
 408         ISIS_SUBTLV_PKT_LOSS = 36,
 409         ISIS_SUBTLV_RES_BW = 37,
 410         ISIS_SUBTLV_AVA_BW = 38,
 411         ISIS_SUBTLV_USE_BW = 39,
 412
 413         ISIS_SUBTLV_MAX = 40
 414 };
 415
 416 /* subTLVs size for TE and SR */
 417 enum ext_subtlv_size {
 418         /* RFC 5307 */
 419         ISIS_SUBTLV_LLRI_SIZE = 8,
 420
 421         /* RFC 5305 & RFC 6119 */
 422         ISIS_SUBTLV_UNRSV_BW_SIZE = 32,
 423         ISIS_SUBTLV_TE_METRIC_SIZE = 3,
 424         ISIS_SUBTLV_IPV6_ADDR_SIZE = 16,
 425
 426         /* RFC 8491 */
 427         ISIS_SUBTLV_NODE_MSD_SIZE = 2,
 428
 429         /* RFC 8667 sections #2 & #3 */
 430         ISIS_SUBTLV_SID_LABEL_SIZE = 3,
 431         ISIS_SUBTLV_SID_INDEX_SIZE = 4,
 432         ISIS_SUBTLV_SID_LABEL_RANGE_SIZE = 9,
 433         ISIS_SUBTLV_ALGORITHM_SIZE = 4,
 434         ISIS_SUBTLV_ADJ_SID_SIZE = 5,
 435         ISIS_SUBTLV_LAN_ADJ_SID_SIZE = 11,
 436         ISIS_SUBTLV_PREFIX_SID_SIZE = 5,
 437
 438         /* RFC 7810 */
 439         ISIS_SUBTLV_MM_DELAY_SIZE = 8,
 440
 441         ISIS_SUBTLV_HDR_SIZE = 2,
 442         ISIS_SUBTLV_DEF_SIZE = 4,
 443
 444         /* RFC 7308 */
 445         ISIS_SUBTLV_EXT_ADMIN_GRP = 14,
 446
 447         ISIS_SUBTLV_MAX_SIZE = 180
 448 };
 449
 450 /* Macros to manage the optional presence of EXT subTLVs */
 451 #define SET_SUBTLV(s, t) ((s->status) |= (t))
 452 #define UNSET_SUBTLV(s, t) ((s->status) &= ~(t))
 453 #define IS_SUBTLV(s, t) (s->status & t)
 454
 455 #define EXT_DISABLE             0x000000
 456 #define EXT_ADM_GRP             0x000001
 457 #define EXT_LLRI                0x000002
 458 #define EXT_LOCAL_ADDR          0x000004
 459 #define EXT_NEIGH_ADDR          0x000008
 460 #define EXT_LOCAL_ADDR6         0x000010
 461 #define EXT_NEIGH_ADDR6         0x000020
 462 #define EXT_MAX_BW              0x000040
 463 #define EXT_MAX_RSV_BW          0x000080
 464 #define EXT_UNRSV_BW            0x000100
 465 #define EXT_TE_METRIC           0x000200
 466 #define EXT_RMT_AS              0x000400
 467 #define EXT_RMT_IP              0x000800
 468 #define EXT_ADJ_SID             0x001000
 469 #define EXT_LAN_ADJ_SID         0x002000
 470 #define EXT_DELAY               0x004000
 471 #define EXT_MM_DELAY            0x008000
 472 #define EXT_DELAY_VAR           0x010000
 473 #define EXT_PKT_LOSS            0x020000
 474 #define EXT_RES_BW              0x040000
 475 #define EXT_AVA_BW              0x080000
 476 #define EXT_USE_BW              0x100000
 477 #define EXT_EXTEND_ADM_GRP 0x200000
 478
 479 /*
 480  * This structure groups all Extended IS Reachability subTLVs.
 481  *
 482  * Each bit of the status field indicates if a subTLVs is valid or not.
 483  * SubTLVs values use following units:
 484  *  - Bandwidth in bytes/sec following IEEE format,
 485  *  - Delay in micro-seconds with only 24 bits significant
 486  *  - Packet Loss in percentage of total traffic with only 24 bits (2^24 - 2)
 487  *
 488  * For Delay and packet Loss, upper bit (A) indicates if the value is
 489  * normal (0) or anomalous (1).
 490  */
 491 #define IS_ANORMAL(v) (v & TE_EXT_ANORMAL)
 492
 493 struct isis_ext_subtlvs {
 494
 495         uint32_t status;
 496
 497         uint32_t adm_group; /* Resource Class/Color - RFC 5305 */
 498         struct admin_group ext_admin_group; /* Res. Class/Color - RFC 7308 */
 499         /* Link Local/Remote Identifiers - RFC 5307 */
 500         uint32_t local_llri;
 501         uint32_t remote_llri;
 502         struct in_addr local_addr; /* Local IP Address - RFC 5305 */
 503         struct in_addr neigh_addr; /* Neighbor IP Address - RFC 5305 */
 504         struct in6_addr local_addr6; /* Local IPv6 Address - RFC 6119 */
 505         struct in6_addr neigh_addr6; /* Neighbor IPv6 Address - RFC 6119 */
 506         float max_bw; /* Maximum Bandwidth - RFC 5305 */
 507         float max_rsv_bw; /* Maximum Reservable Bandwidth - RFC 5305 */
 508         float unrsv_bw[8]; /* Unreserved Bandwidth - RFC 5305 */
 509         uint32_t te_metric; /* Traffic Engineering Metric - RFC 5305 */
 510         uint32_t remote_as; /* Remote AS Number sub-TLV - RFC5316 */
 511         struct in_addr remote_ip; /* IPv4 Remote ASBR ID Sub-TLV - RFC5316 */
 512
 513         uint32_t delay; /* Average Link Delay  - RFC 8570 */
 514         uint32_t min_delay; /* Low Link Delay  - RFC 8570 */
 515         uint32_t max_delay; /* High Link Delay  - RFC 8570 */
 516         uint32_t delay_var; /* Link Delay Variation i.e. Jitter - RFC 8570 */
 517         uint32_t pkt_loss; /* Unidirectional Link Packet Loss - RFC 8570 */
 518         float res_bw; /* Unidirectional Residual Bandwidth - RFC 8570 */
 519         float ava_bw; /* Unidirectional Available Bandwidth - RFC 8570 */
 520         float use_bw; /* Unidirectional Utilized Bandwidth - RFC 8570 */
 521
 522         /* Segment Routing Adjacency & LAN Adjacency Segment ID */
 523         struct isis_item_list adj_sid;
 524         struct isis_item_list lan_sid;
 525 };
 526
 527 #define IS_COMPAT_MT_TLV(tlv_type)                                             \
 528         ((tlv_type == ISIS_TLV_MT_REACH) || (tlv_type == ISIS_TLV_MT_IP_REACH) \
 529          || (tlv_type == ISIS_TLV_MT_IPV6_REACH))
 530
 531 struct stream;
 532 int isis_pack_tlvs(struct isis_tlvs *tlvs, struct stream *stream,
 533                    size_t len_pointer, bool pad, bool is_lsp);
 534 void isis_free_tlvs(struct isis_tlvs *tlvs);
 535 struct isis_tlvs *isis_alloc_tlvs(void);
 536 int isis_unpack_tlvs(size_t avail_len, struct stream *stream,
 537                      struct isis_tlvs **dest, const char **error_log);
 538 const char *isis_format_tlvs(struct isis_tlvs *tlvs, struct json_object *json);
 539 struct isis_tlvs *isis_copy_tlvs(struct isis_tlvs *tlvs);
 540 struct list *isis_fragment_tlvs(struct isis_tlvs *tlvs, size_t size);
 541
 542 #define ISIS_EXTENDED_IP_REACH_DOWN 0x80
 543 #define ISIS_EXTENDED_IP_REACH_SUBTLV 0x40
 544
 545 #define ISIS_IPV6_REACH_DOWN 0x80
 546 #define ISIS_IPV6_REACH_EXTERNAL 0x40
 547 #define ISIS_IPV6_REACH_SUBTLV 0x20
 548
 549 #ifndef ISIS_MT_MASK
 550 #define ISIS_MT_MASK           0x0fff
 551 #define ISIS_MT_OL_MASK        0x8000
 552 #define ISIS_MT_AT_MASK        0x4000
 553 #endif
 554
 555 void isis_tlvs_add_auth(struct isis_tlvs *tlvs, struct isis_passwd *passwd);
 556 void isis_tlvs_add_area_addresses(struct isis_tlvs *tlvs,
 557                                   struct list *addresses);
 558 void isis_tlvs_add_lan_neighbors(struct isis_tlvs *tlvs,
 559                                  struct list *neighbors);
 560 void isis_tlvs_set_protocols_supported(struct isis_tlvs *tlvs,
 561                                        struct nlpids *nlpids);
 562 void isis_tlvs_add_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid,
 563                                   bool overload, bool attached);
 564 void isis_tlvs_add_ipv4_address(struct isis_tlvs *tlvs, struct in_addr *addr);
 565 void isis_tlvs_add_ipv4_addresses(struct isis_tlvs *tlvs,
 566                                   struct list *addresses);
 567 void isis_tlvs_add_ipv6_addresses(struct isis_tlvs *tlvs,
 568                                   struct list *addresses);
 569 void isis_tlvs_add_global_ipv6_addresses(struct isis_tlvs *tlvs,
 570                                          struct list *addresses);
 571 int isis_tlvs_auth_is_valid(struct isis_tlvs *tlvs, struct isis_passwd *passwd,
 572                             struct stream *stream, bool is_lsp);
 573 bool isis_tlvs_area_addresses_match(struct isis_tlvs *tlvs,
 574                                     struct list *addresses);
 575 struct isis_adjacency;
 576 void isis_tlvs_to_adj(struct isis_tlvs *tlvs, struct isis_adjacency *adj,
 577                       bool *changed);
 578 bool isis_tlvs_own_snpa_found(struct isis_tlvs *tlvs, uint8_t *snpa);
 579 void isis_tlvs_add_lsp_entry(struct isis_tlvs *tlvs, struct isis_lsp *lsp);
 580 void isis_tlvs_add_csnp_entries(struct isis_tlvs *tlvs, uint8_t *start_id,
 581                                 uint8_t *stop_id, uint16_t num_lsps,
 582                                 struct lspdb_head *lspdb,
 583                                 struct isis_lsp **last_lsp);
 584 void isis_tlvs_set_dynamic_hostname(struct isis_tlvs *tlvs,
 585                                     const char *hostname);
 586 void isis_tlvs_set_router_capability(struct isis_tlvs *tlvs,
 587                      const struct isis_router_cap *cap);
 588 void isis_tlvs_set_te_router_id(struct isis_tlvs *tlvs,
 589                                 const struct in_addr *id);
 590 void isis_tlvs_set_te_router_id_ipv6(struct isis_tlvs *tlvs,
 591                                      const struct in6_addr *id);
 592 void isis_tlvs_add_oldstyle_ip_reach(struct isis_tlvs *tlvs,
 593                                      struct prefix_ipv4 *dest, uint8_t metric);
 594 void isis_tlvs_add_extended_ip_reach(struct isis_tlvs *tlvs,
 595                                      struct prefix_ipv4 *dest, uint32_t metric,
 596                                      bool external, struct sr_prefix_cfg *pcfg);
 597 void isis_tlvs_add_ipv6_reach(struct isis_tlvs *tlvs, uint16_t mtid,
 598                               struct prefix_ipv6 *dest, uint32_t metric,
 599                               bool external, struct sr_prefix_cfg *pcfg);
 600 void isis_tlvs_add_ipv6_dstsrc_reach(struct isis_tlvs *tlvs, uint16_t mtid,
 601                                      struct prefix_ipv6 *dest,
 602                                      struct prefix_ipv6 *src,
 603                                      uint32_t metric);
 604 struct isis_ext_subtlvs *isis_alloc_ext_subtlvs(void);
 605 void isis_del_ext_subtlvs(struct isis_ext_subtlvs *ext);
 606 void isis_tlvs_add_adj_sid(struct isis_ext_subtlvs *exts,
 607                            struct isis_adj_sid *adj);
 608 void isis_tlvs_del_adj_sid(struct isis_ext_subtlvs *exts,
 609                            struct isis_adj_sid *adj);
 610 void isis_tlvs_add_lan_adj_sid(struct isis_ext_subtlvs *exts,
 611                                struct isis_lan_adj_sid *lan);
 612 void isis_tlvs_del_lan_adj_sid(struct isis_ext_subtlvs *exts,
 613                                struct isis_lan_adj_sid *lan);
 614
 615 void isis_tlvs_add_oldstyle_reach(struct isis_tlvs *tlvs, uint8_t *id,
 616                                   uint8_t metric);
 617 void isis_tlvs_add_extended_reach(struct isis_tlvs *tlvs, uint16_t mtid,
 618                                   uint8_t *id, uint32_t metric,
 619                                   struct isis_ext_subtlvs *subtlvs);
 620
 621 const char *isis_threeway_state_name(enum isis_threeway_state state);
 622
 623 void isis_tlvs_add_threeway_adj(struct isis_tlvs *tlvs,
 624                                 enum isis_threeway_state state,
 625                                 uint32_t local_circuit_id,
 626                                 const uint8_t *neighbor_id,
 627                                 uint32_t neighbor_circuit_id);
 628
 629 void isis_tlvs_add_spine_leaf(struct isis_tlvs *tlvs, uint8_t tier,
 630                               bool has_tier, bool is_leaf, bool is_spine,
 631                               bool is_backup);
 632
 633 struct isis_mt_router_info *
 634 isis_tlvs_lookup_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid);
 635
 636 void isis_tlvs_set_purge_originator(struct isis_tlvs *tlvs,
 637                                     const uint8_t *generator,
 638                                     const uint8_t *sender);
 639 #endif