isisd/isis_tlvs.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * IS-IS TLV Serializer/Deserializer
   4  *
   5  * Copyright (C) 2015,2017 Christian Franke
   6
   7  * Copyright (C) 2019 Olivier Dugeon - Orange Labs (for TE and SR)
   8  */
   9 #ifndef ISIS_TLVS_H
  10 #define ISIS_TLVS_H
  11
  12 #include "segment_routing.h"
  13 #include "openbsd-tree.h"
  14 #include "prefix.h"
  15 #include "flex_algo.h"
  16 #include "affinitymap.h"
  17
  18
  19 DECLARE_MTYPE(ISIS_SUBTLV);
  20
  21 struct lspdb_head;
  22 struct sr_prefix_cfg;
  23
  24 struct isis_area_address {
  25         struct isis_area_address *next;
  26
  27         uint8_t addr[20];
  28         uint8_t len;
  29 };
  30
  31 #define ISIS_WIDE_METRIC_INFINITY   0xFFFFFE
  32 #define ISIS_NARROW_METRIC_INFINITY 62
  33
  34 struct isis_oldstyle_reach {
  35         struct isis_oldstyle_reach *next;
  36
  37         uint8_t id[7];
  38         uint8_t metric;
  39 };
  40
  41 struct isis_oldstyle_ip_reach {
  42         struct isis_oldstyle_ip_reach *next;
  43
  44         uint8_t metric;
  45         struct prefix_ipv4 prefix;
  46 };
  47
  48 struct isis_lsp_entry {
  49         struct isis_lsp_entry *next;
  50
  51         uint16_t rem_lifetime;
  52         uint8_t id[8];
  53         uint16_t checksum;
  54         uint32_t seqno;
  55
  56         struct isis_lsp *lsp;
  57 };
  58
  59 struct isis_extended_reach {
  60         struct isis_extended_reach *next;
  61
  62         uint8_t id[7];
  63         uint32_t metric;
  64
  65         struct isis_ext_subtlvs *subtlvs;
  66 };
  67
  68 struct isis_extended_ip_reach {
  69         struct isis_extended_ip_reach *next;
  70
  71         uint32_t metric;
  72         bool down;
  73         struct prefix_ipv4 prefix;
  74
  75         struct isis_subtlvs *subtlvs;
  76 };
  77
  78 struct isis_ipv6_reach {
  79         struct isis_ipv6_reach *next;
  80
  81         uint32_t metric;
  82         bool down;
  83         bool external;
  84
  85         struct prefix_ipv6 prefix;
  86
  87         struct isis_subtlvs *subtlvs;
  88 };
  89
  90 struct isis_protocols_supported {
  91         uint8_t count;
  92         uint8_t *protocols;
  93 };
  94
  95 #define ISIS_TIER_UNDEFINED 15
  96
  97 struct isis_spine_leaf {
  98         uint8_t tier;
  99
 100         bool has_tier;
 101         bool is_leaf;
 102         bool is_spine;
 103         bool is_backup;
 104 };
 105
 106 enum isis_threeway_state {
 107         ISIS_THREEWAY_DOWN = 2,
 108         ISIS_THREEWAY_INITIALIZING = 1,
 109         ISIS_THREEWAY_UP = 0,
 110 };
 111
 112 struct isis_threeway_adj {
 113         enum isis_threeway_state state;
 114         uint32_t local_circuit_id;
 115         bool neighbor_set;
 116         uint8_t neighbor_id[6];
 117         uint32_t neighbor_circuit_id;
 118 };
 119
 120 /* Segment Routing subTLV's as per RFC8667 */
 121 #define ISIS_SUBTLV_SRGB_FLAG_I         0x80
 122 #define ISIS_SUBTLV_SRGB_FLAG_V         0x40
 123 #define IS_SR_IPV4(srgb)               ((srgb)->flags & ISIS_SUBTLV_SRGB_FLAG_I)
 124 #define IS_SR_IPV6(srgb)               ((srgb)->flags & ISIS_SUBTLV_SRGB_FLAG_V)
 125 #define SUBTLV_SR_BLOCK_SIZE            6
 126 #define SUBTLV_RANGE_INDEX_SIZE         10
 127 #define SUBTLV_RANGE_LABEL_SIZE         9
 128
 129 /* Structure aggregating SR Global (SRGB) or Local (SRLB) Block info */
 130 struct isis_sr_block {
 131         uint8_t flags;
 132         uint32_t range_size;
 133         uint32_t lower_bound;
 134 };
 135
 136 /* Prefix-SID sub-TLVs flags */
 137 #define ISIS_PREFIX_SID_READVERTISED  0x80
 138 #define ISIS_PREFIX_SID_NODE          0x40
 139 #define ISIS_PREFIX_SID_NO_PHP        0x20
 140 #define ISIS_PREFIX_SID_EXPLICIT_NULL 0x10
 141 #define ISIS_PREFIX_SID_VALUE         0x08
 142 #define ISIS_PREFIX_SID_LOCAL         0x04
 143
 144 struct isis_prefix_sid {
 145         struct isis_prefix_sid *next;
 146
 147         uint8_t flags;
 148         uint8_t algorithm;
 149         uint32_t value;
 150 };
 151
 152 /* Adj-SID and LAN-Ajd-SID sub-TLVs flags */
 153 #define EXT_SUBTLV_LINK_ADJ_SID_FFLG    0x80
 154 #define EXT_SUBTLV_LINK_ADJ_SID_BFLG    0x40
 155 #define EXT_SUBTLV_LINK_ADJ_SID_VFLG    0x20
 156 #define EXT_SUBTLV_LINK_ADJ_SID_LFLG    0x10
 157 #define EXT_SUBTLV_LINK_ADJ_SID_SFLG    0x08
 158 #define EXT_SUBTLV_LINK_ADJ_SID_PFLG    0x04
 159
 160 struct isis_adj_sid {
 161         struct isis_adj_sid *next;
 162
 163         uint8_t family;
 164         uint8_t flags;
 165         uint8_t weight;
 166         uint32_t sid;
 167 };
 168
 169 struct isis_lan_adj_sid {
 170         struct isis_lan_adj_sid *next;
 171
 172         uint8_t family;
 173         uint8_t flags;
 174         uint8_t weight;
 175         uint8_t neighbor_id[ISIS_SYS_ID_LEN];
 176         uint32_t sid;
 177 };
 178
 179 /* RFC 4971 & RFC 7981 */
 180 #define ISIS_ROUTER_CAP_FLAG_S  0x01
 181 #define ISIS_ROUTER_CAP_FLAG_D  0x02
 182 #define ISIS_ROUTER_CAP_SIZE    5
 183
 184 #define MSD_TYPE_BASE_MPLS_IMPOSITION  0x01
 185 #define MSD_TLV_SIZE            2
 186
 187 #ifndef FABRICD
 188 struct isis_router_cap_fad;
 189 struct isis_router_cap_fad {
 190         uint8_t sysid[ISIS_SYS_ID_LEN + 2];
 191
 192         struct flex_algo fad;
 193 };
 194 #endif /* ifndef FABRICD */
 195
 196 struct isis_router_cap {
 197         struct in_addr router_id;
 198         uint8_t flags;
 199
 200         /* RFC 8667 section #3 */
 201         struct isis_sr_block srgb;
 202         struct isis_sr_block srlb;
 203         uint8_t algo[SR_ALGORITHM_COUNT];
 204         /* RFC 8491 */
 205         uint8_t msd;
 206
 207 #ifndef FABRICD
 208         /* RFC9350 Flex-Algorithm */
 209         struct isis_router_cap_fad *fads[SR_ALGORITHM_COUNT];
 210 #endif /* ifndef FABRICD */
 211 };
 212
 213 struct isis_item {
 214         struct isis_item *next;
 215 };
 216
 217 struct isis_lan_neighbor {
 218         struct isis_lan_neighbor *next;
 219
 220         uint8_t mac[6];
 221 };
 222
 223 struct isis_ipv4_address {
 224         struct isis_ipv4_address *next;
 225
 226         struct in_addr addr;
 227 };
 228
 229 struct isis_ipv6_address {
 230         struct isis_ipv6_address *next;
 231
 232         struct in6_addr addr;
 233 };
 234
 235 struct isis_mt_router_info {
 236         struct isis_mt_router_info *next;
 237
 238         bool overload;
 239         bool attached;
 240         uint16_t mtid;
 241 };
 242
 243 struct isis_auth {
 244         struct isis_auth *next;
 245
 246         uint8_t type;
 247         uint8_t length;
 248         uint8_t value[256];
 249
 250         uint8_t plength;
 251         uint8_t passwd[256];
 252
 253         size_t offset; /* Only valid after packing */
 254 };
 255
 256 struct isis_item_list {
 257         struct isis_item *head;
 258         struct isis_item **tail;
 259
 260         RB_ENTRY(isis_item_list) mt_tree;
 261         uint16_t mtid;
 262         unsigned int count;
 263 };
 264
 265 struct isis_purge_originator {
 266         bool sender_set;
 267
 268         uint8_t generator[6];
 269         uint8_t sender[6];
 270 };
 271
 272 enum isis_auth_result {
 273         ISIS_AUTH_OK = 0,
 274         ISIS_AUTH_TYPE_FAILURE,
 275         ISIS_AUTH_FAILURE,
 276         ISIS_AUTH_NO_VALIDATOR,
 277 };
 278
 279 RB_HEAD(isis_mt_item_list, isis_item_list);
 280
 281 struct isis_item_list *isis_get_mt_items(struct isis_mt_item_list *m,
 282                                          uint16_t mtid);
 283 struct isis_item_list *isis_lookup_mt_items(struct isis_mt_item_list *m,
 284                                             uint16_t mtid);
 285
 286 struct isis_tlvs {
 287         struct isis_item_list isis_auth;
 288         struct isis_purge_originator *purge_originator;
 289         struct isis_item_list area_addresses;
 290         struct isis_item_list oldstyle_reach;
 291         struct isis_item_list lan_neighbor;
 292         struct isis_item_list lsp_entries;
 293         struct isis_item_list extended_reach;
 294         struct isis_mt_item_list mt_reach;
 295         struct isis_item_list oldstyle_ip_reach;
 296         struct isis_protocols_supported protocols_supported;
 297         struct isis_item_list oldstyle_ip_reach_ext;
 298         struct isis_item_list ipv4_address;
 299         struct isis_item_list ipv6_address;
 300         struct isis_item_list global_ipv6_address;
 301         struct isis_item_list mt_router_info;
 302         bool mt_router_info_empty;
 303         struct in_addr *te_router_id;
 304         struct in6_addr *te_router_id_ipv6;
 305         struct isis_item_list extended_ip_reach;
 306         struct isis_mt_item_list mt_ip_reach;
 307         char *hostname;
 308         struct isis_item_list ipv6_reach;
 309         struct isis_mt_item_list mt_ipv6_reach;
 310         struct isis_threeway_adj *threeway_adj;
 311         struct isis_router_cap *router_cap;
 312         struct isis_spine_leaf *spine_leaf;
 313 };
 314
 315 enum isis_tlv_context {
 316         ISIS_CONTEXT_LSP,
 317         ISIS_CONTEXT_SUBTLV_NE_REACH,
 318         ISIS_CONTEXT_SUBTLV_IP_REACH,
 319         ISIS_CONTEXT_SUBTLV_IPV6_REACH,
 320         ISIS_CONTEXT_MAX,
 321 };
 322
 323 struct isis_subtlvs {
 324         enum isis_tlv_context context;
 325
 326         /* draft-baker-ipv6-isis-dst-src-routing-06 */
 327         struct prefix_ipv6 *source_prefix;
 328         /* RFC 8667 section #2.4 */
 329         struct isis_item_list prefix_sids;
 330 };
 331
 332 enum isis_tlv_type {
 333         /* TLVs code point */
 334         ISIS_TLV_AREA_ADDRESSES = 1,
 335         ISIS_TLV_OLDSTYLE_REACH = 2,
 336         ISIS_TLV_LAN_NEIGHBORS = 6,
 337         ISIS_TLV_PADDING = 8,
 338         ISIS_TLV_LSP_ENTRY = 9,
 339         ISIS_TLV_AUTH = 10,
 340         ISIS_TLV_PURGE_ORIGINATOR = 13,
 341         ISIS_TLV_EXTENDED_REACH = 22,
 342
 343         ISIS_TLV_OLDSTYLE_IP_REACH = 128,
 344         ISIS_TLV_PROTOCOLS_SUPPORTED = 129,
 345         ISIS_TLV_OLDSTYLE_IP_REACH_EXT = 130,
 346         ISIS_TLV_IPV4_ADDRESS = 132,
 347         ISIS_TLV_TE_ROUTER_ID = 134,
 348         ISIS_TLV_EXTENDED_IP_REACH = 135,
 349         ISIS_TLV_DYNAMIC_HOSTNAME = 137,
 350         ISIS_TLV_TE_ROUTER_ID_IPV6 = 140,
 351         ISIS_TLV_SPINE_LEAF_EXT = 150,
 352         ISIS_TLV_MT_REACH = 222,
 353         ISIS_TLV_MT_ROUTER_INFO = 229,
 354         ISIS_TLV_IPV6_ADDRESS = 232,
 355         ISIS_TLV_GLOBAL_IPV6_ADDRESS = 233,
 356         ISIS_TLV_MT_IP_REACH = 235,
 357         ISIS_TLV_IPV6_REACH = 236,
 358         ISIS_TLV_MT_IPV6_REACH = 237,
 359         ISIS_TLV_THREE_WAY_ADJ = 240,
 360         ISIS_TLV_ROUTER_CAPABILITY = 242,
 361         ISIS_TLV_MAX = 256,
 362
 363         /* subTLVs code point */
 364         ISIS_SUBTLV_IPV6_SOURCE_PREFIX = 22,
 365
 366         /* RFC 5305 & RFC 6119 */
 367         ISIS_SUBTLV_ADMIN_GRP = 3,
 368         ISIS_SUBTLV_LOCAL_IPADDR = 6,
 369         ISIS_SUBTLV_RMT_IPADDR = 8,
 370         ISIS_SUBTLV_MAX_BW = 9,
 371         ISIS_SUBTLV_MAX_RSV_BW = 10,
 372         ISIS_SUBTLV_UNRSV_BW = 11,
 373         ISIS_SUBTLV_LOCAL_IPADDR6 = 12,
 374         ISIS_SUBTLV_RMT_IPADDR6 = 13,
 375         ISIS_SUBTLV_TE_METRIC = 18,
 376
 377         /* RFC 5307 */
 378         ISIS_SUBTLV_LLRI = 4,
 379
 380         /* RFC 8491 */
 381         ISIS_SUBTLV_NODE_MSD = 23,
 382
 383         /* RFC 5316 */
 384         ISIS_SUBTLV_RAS = 24,
 385         ISIS_SUBTLV_RIP = 25,
 386
 387         /* RFC 8667 section #4 IANA allocation */
 388         ISIS_SUBTLV_SID_LABEL = 1,
 389         ISIS_SUBTLV_SID_LABEL_RANGE = 2,
 390         ISIS_SUBTLV_ALGORITHM = 19,
 391         ISIS_SUBTLV_SRLB = 22,
 392         ISIS_SUBTLV_PREFIX_SID = 3,
 393         ISIS_SUBTLV_ADJ_SID = 31,
 394         ISIS_SUBTLV_LAN_ADJ_SID = 32,
 395
 396         /* RFC 7810 */
 397         ISIS_SUBTLV_AV_DELAY = 33,
 398         ISIS_SUBTLV_MM_DELAY = 34,
 399         ISIS_SUBTLV_DELAY_VAR = 35,
 400         ISIS_SUBTLV_PKT_LOSS = 36,
 401         ISIS_SUBTLV_RES_BW = 37,
 402         ISIS_SUBTLV_AVA_BW = 38,
 403         ISIS_SUBTLV_USE_BW = 39,
 404
 405         /* RFC 7308 */
 406         ISIS_SUBTLV_EXT_ADMIN_GRP = 14,
 407
 408         /* RFC 8919 */
 409         ISIS_SUBTLV_ASLA = 16,
 410
 411         /* draft-ietf-lsr-isis-srv6-extensions */
 412         ISIS_SUBTLV_SID_END = 5,
 413         ISIS_SUBTLV_SID_END_X = 43,
 414
 415         ISIS_SUBTLV_MAX = 40,
 416
 417         /* draft-ietf-lsr-isis-srv6-extensions */
 418         ISIS_SUBSUBTLV_SID_STRUCTURE = 1,
 419
 420         ISIS_SUBSUBTLV_MAX = 256,
 421 };
 422
 423 /* subTLVs size for TE and SR */
 424 enum ext_subtlv_size {
 425         /* RFC 5307 */
 426         ISIS_SUBTLV_LLRI_SIZE = 8,
 427
 428         /* RFC 5305 & RFC 6119 */
 429         ISIS_SUBTLV_UNRSV_BW_SIZE = 32,
 430         ISIS_SUBTLV_TE_METRIC_SIZE = 3,
 431         ISIS_SUBTLV_IPV6_ADDR_SIZE = 16,
 432
 433         /* RFC 8491 */
 434         ISIS_SUBTLV_NODE_MSD_SIZE = 2,
 435
 436         /* RFC 8667 sections #2 & #3 */
 437         ISIS_SUBTLV_SID_LABEL_SIZE = 3,
 438         ISIS_SUBTLV_SID_INDEX_SIZE = 4,
 439         ISIS_SUBTLV_SID_LABEL_RANGE_SIZE = 9,
 440         ISIS_SUBTLV_ALGORITHM_SIZE = 4,
 441         ISIS_SUBTLV_ADJ_SID_SIZE = 5,
 442         ISIS_SUBTLV_LAN_ADJ_SID_SIZE = 11,
 443         ISIS_SUBTLV_PREFIX_SID_SIZE = 5,
 444
 445         /* RFC 7810 */
 446         ISIS_SUBTLV_MM_DELAY_SIZE = 8,
 447
 448         /* RFC9350 - Flex-Algorithm */
 449         ISIS_SUBTLV_FAD = 26,
 450         ISIS_SUBTLV_FAD_MIN_SIZE = 4,
 451
 452         ISIS_SUBTLV_HDR_SIZE = 2,
 453         ISIS_SUBTLV_DEF_SIZE = 4,
 454
 455         ISIS_SUBTLV_MAX_SIZE = 180,
 456
 457         /* draft-ietf-lsr-isis-srv6-extensions */
 458         ISIS_SUBSUBTLV_SID_STRUCTURE_SIZE = 4,
 459
 460         ISIS_SUBSUBTLV_HDR_SIZE = 2,
 461         ISIS_SUBSUBTLV_MAX_SIZE = 180,
 462
 463         /* RFC9350 - Flex-Algorithm */
 464         ISIS_SUBTLV_FAD_SUBSUBTLV_FLAGS_SIZE = 1,
 465 };
 466
 467 enum ext_subsubtlv_types {
 468         ISIS_SUBTLV_FAD_SUBSUBTLV_EXCAG = 1,
 469         ISIS_SUBTLV_FAD_SUBSUBTLV_INCANYAG = 2,
 470         ISIS_SUBTLV_FAD_SUBSUBTLV_INCALLAG = 3,
 471         ISIS_SUBTLV_FAD_SUBSUBTLV_FLAGS = 4,
 472         ISIS_SUBTLV_FAD_SUBSUBTLV_ESRLG = 5,
 473 };
 474
 475 /* Macros to manage the optional presence of EXT subTLVs */
 476 #define SET_SUBTLV(s, t) ((s->status) |= (t))
 477 #define UNSET_SUBTLV(s, t) ((s->status) &= ~(t))
 478 #define IS_SUBTLV(s, t) (s->status & t)
 479 #define RESET_SUBTLV(s) (s->status = 0)
 480 #define NO_SUBTLV(s) (s->status == 0)
 481
 482 #define EXT_DISABLE             0x000000
 483 #define EXT_ADM_GRP             0x000001
 484 #define EXT_LLRI                0x000002
 485 #define EXT_LOCAL_ADDR          0x000004
 486 #define EXT_NEIGH_ADDR          0x000008
 487 #define EXT_LOCAL_ADDR6         0x000010
 488 #define EXT_NEIGH_ADDR6         0x000020
 489 #define EXT_MAX_BW              0x000040
 490 #define EXT_MAX_RSV_BW          0x000080
 491 #define EXT_UNRSV_BW            0x000100
 492 #define EXT_TE_METRIC           0x000200
 493 #define EXT_RMT_AS              0x000400
 494 #define EXT_RMT_IP              0x000800
 495 #define EXT_ADJ_SID             0x001000
 496 #define EXT_LAN_ADJ_SID         0x002000
 497 #define EXT_DELAY               0x004000
 498 #define EXT_MM_DELAY            0x008000
 499 #define EXT_DELAY_VAR           0x010000
 500 #define EXT_PKT_LOSS            0x020000
 501 #define EXT_RES_BW              0x040000
 502 #define EXT_AVA_BW              0x080000
 503 #define EXT_USE_BW              0x100000
 504 #define EXT_EXTEND_ADM_GRP 0x200000
 505
 506 /*
 507  * This structure groups all Extended IS Reachability subTLVs.
 508  *
 509  * Each bit of the status field indicates if a subTLVs is valid or not.
 510  * SubTLVs values use following units:
 511  *  - Bandwidth in bytes/sec following IEEE format,
 512  *  - Delay in micro-seconds with only 24 bits significant
 513  *  - Packet Loss in percentage of total traffic with only 24 bits (2^24 - 2)
 514  *
 515  * For Delay and packet Loss, upper bit (A) indicates if the value is
 516  * normal (0) or anomalous (1).
 517  */
 518 #define IS_ANORMAL(v) (v & TE_EXT_ANORMAL)
 519
 520 struct isis_ext_subtlvs {
 521
 522         uint32_t status;
 523
 524         uint32_t adm_group; /* Resource Class/Color - RFC 5305 */
 525         struct admin_group ext_admin_group; /* Res. Class/Color - RFC 7308 */
 526         /* Link Local/Remote Identifiers - RFC 5307 */
 527         uint32_t local_llri;
 528         uint32_t remote_llri;
 529         struct in_addr local_addr; /* Local IP Address - RFC 5305 */
 530         struct in_addr neigh_addr; /* Neighbor IP Address - RFC 5305 */
 531         struct in6_addr local_addr6; /* Local IPv6 Address - RFC 6119 */
 532         struct in6_addr neigh_addr6; /* Neighbor IPv6 Address - RFC 6119 */
 533         float max_bw; /* Maximum Bandwidth - RFC 5305 */
 534         float max_rsv_bw; /* Maximum Reservable Bandwidth - RFC 5305 */
 535         float unrsv_bw[8]; /* Unreserved Bandwidth - RFC 5305 */
 536         uint32_t te_metric; /* Traffic Engineering Metric - RFC 5305 */
 537         uint32_t remote_as; /* Remote AS Number sub-TLV - RFC5316 */
 538         struct in_addr remote_ip; /* IPv4 Remote ASBR ID Sub-TLV - RFC5316 */
 539
 540         uint32_t delay; /* Average Link Delay  - RFC 8570 */
 541         uint32_t min_delay; /* Low Link Delay  - RFC 8570 */
 542         uint32_t max_delay; /* High Link Delay  - RFC 8570 */
 543         uint32_t delay_var; /* Link Delay Variation i.e. Jitter - RFC 8570 */
 544         uint32_t pkt_loss; /* Unidirectional Link Packet Loss - RFC 8570 */
 545         float res_bw; /* Unidirectional Residual Bandwidth - RFC 8570 */
 546         float ava_bw; /* Unidirectional Available Bandwidth - RFC 8570 */
 547         float use_bw; /* Unidirectional Utilized Bandwidth - RFC 8570 */
 548
 549         /* Segment Routing Adjacency & LAN Adjacency Segment ID */
 550         struct isis_item_list adj_sid;
 551         struct isis_item_list lan_sid;
 552
 553         struct list *aslas;
 554 };
 555
 556 /* RFC 8919 */
 557 #define ISIS_SABM_FLAG_R 0x80 /* RSVP-TE */
 558 #define ISIS_SABM_FLAG_S 0x40 /* Segment Routing Policy */
 559 #define ISIS_SABM_FLAG_L 0x20 /* Loop-Free Alternate */
 560 #define ISIS_SABM_FLAG_X 0x10 /* Flex-Algorithm - RFC9350 */
 561
 562 #define ASLA_APP_IDENTIFIER_BIT_LENGTH 1
 563 #define ASLA_LEGACY_FLAG 0x80
 564 #define ASLA_APPS_LENGTH_MASK 0x7f
 565
 566 struct isis_asla_subtlvs {
 567         uint32_t status;
 568
 569         /* Application Specific Link Attribute - RFC 8919 */
 570         bool legacy; /* L-Flag */
 571         uint8_t standard_apps_length;
 572         uint8_t user_def_apps_length;
 573         uint8_t standard_apps;
 574         uint8_t user_def_apps;
 575
 576         /* Sub-TLV list - rfc8919 section-3.1 */
 577         uint32_t admin_group;
 578         struct admin_group ext_admin_group; /* Res. Class/Color - RFC 7308 */
 579         float max_bw;                       /* Maximum Bandwidth - RFC 5305 */
 580         float max_rsv_bw;   /* Maximum Reservable Bandwidth - RFC 5305 */
 581         float unrsv_bw[8];  /* Unreserved Bandwidth - RFC 5305 */
 582         uint32_t te_metric; /* Traffic Engineering Metric - RFC 5305 */
 583         uint32_t delay;     /* Average Link Delay  - RFC 8570 */
 584         uint32_t min_delay; /* Low Link Delay  - RFC 8570 */
 585         uint32_t max_delay; /* High Link Delay  - RFC 8570 */
 586         uint32_t delay_var; /* Link Delay Variation i.e. Jitter - RFC 8570 */
 587         uint32_t pkt_loss;  /* Unidirectional Link Packet Loss - RFC 8570 */
 588         float res_bw;       /* Unidirectional Residual Bandwidth - RFC 8570 */
 589         float ava_bw;       /* Unidirectional Available Bandwidth - RFC 8570 */
 590         float use_bw;       /* Unidirectional Utilized Bandwidth - RFC 8570 */
 591 };
 592
 593 #define IS_COMPAT_MT_TLV(tlv_type)                                             \
 594         ((tlv_type == ISIS_TLV_MT_REACH) || (tlv_type == ISIS_TLV_MT_IP_REACH) \
 595          || (tlv_type == ISIS_TLV_MT_IPV6_REACH))
 596
 597 struct stream;
 598 int isis_pack_tlvs(struct isis_tlvs *tlvs, struct stream *stream,
 599                    size_t len_pointer, bool pad, bool is_lsp);
 600 void isis_free_tlvs(struct isis_tlvs *tlvs);
 601 struct isis_tlvs *isis_alloc_tlvs(void);
 602 int isis_unpack_tlvs(size_t avail_len, struct stream *stream,
 603                      struct isis_tlvs **dest, const char **error_log);
 604 const char *isis_format_tlvs(struct isis_tlvs *tlvs, struct json_object *json);
 605 struct isis_tlvs *isis_copy_tlvs(struct isis_tlvs *tlvs);
 606 struct list *isis_fragment_tlvs(struct isis_tlvs *tlvs, size_t size);
 607
 608 #define ISIS_EXTENDED_IP_REACH_DOWN 0x80
 609 #define ISIS_EXTENDED_IP_REACH_SUBTLV 0x40
 610
 611 #define ISIS_IPV6_REACH_DOWN 0x80
 612 #define ISIS_IPV6_REACH_EXTERNAL 0x40
 613 #define ISIS_IPV6_REACH_SUBTLV 0x20
 614
 615 #ifndef ISIS_MT_MASK
 616 #define ISIS_MT_MASK           0x0fff
 617 #define ISIS_MT_OL_MASK        0x8000
 618 #define ISIS_MT_AT_MASK        0x4000
 619 #endif
 620
 621 /* RFC 8919 */
 622 #define ISIS_SABM_FLAG_R 0x80 /* RSVP-TE */
 623 #define ISIS_SABM_FLAG_S 0x40 /* Segment Routing Policy */
 624 #define ISIS_SABM_FLAG_L 0x20 /* Loop-Free Alternate */
 625 #define ISIS_SABM_FLAG_X 0x10 /* Flex-Algorithm - RFC9350 */
 626
 627 void isis_tlvs_add_auth(struct isis_tlvs *tlvs, struct isis_passwd *passwd);
 628 void isis_tlvs_add_area_addresses(struct isis_tlvs *tlvs,
 629                                   struct list *addresses);
 630 void isis_tlvs_add_lan_neighbors(struct isis_tlvs *tlvs,
 631                                  struct list *neighbors);
 632 void isis_tlvs_set_protocols_supported(struct isis_tlvs *tlvs,
 633                                        struct nlpids *nlpids);
 634 void isis_tlvs_add_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid,
 635                                   bool overload, bool attached);
 636 void isis_tlvs_add_ipv4_address(struct isis_tlvs *tlvs, struct in_addr *addr);
 637 void isis_tlvs_add_ipv4_addresses(struct isis_tlvs *tlvs,
 638                                   struct list *addresses);
 639 void isis_tlvs_add_ipv6_addresses(struct isis_tlvs *tlvs,
 640                                   struct list *addresses);
 641 void isis_tlvs_add_global_ipv6_addresses(struct isis_tlvs *tlvs,
 642                                          struct list *addresses);
 643 int isis_tlvs_auth_is_valid(struct isis_tlvs *tlvs, struct isis_passwd *passwd,
 644                             struct stream *stream, bool is_lsp);
 645 bool isis_tlvs_area_addresses_match(struct isis_tlvs *tlvs,
 646                                     struct list *addresses);
 647 struct isis_adjacency;
 648 void isis_tlvs_to_adj(struct isis_tlvs *tlvs, struct isis_adjacency *adj,
 649                       bool *changed);
 650 bool isis_tlvs_own_snpa_found(struct isis_tlvs *tlvs, uint8_t *snpa);
 651 void isis_tlvs_add_lsp_entry(struct isis_tlvs *tlvs, struct isis_lsp *lsp);
 652 void isis_tlvs_add_csnp_entries(struct isis_tlvs *tlvs, uint8_t *start_id,
 653                                 uint8_t *stop_id, uint16_t num_lsps,
 654                                 struct lspdb_head *lspdb,
 655                                 struct isis_lsp **last_lsp);
 656 void isis_tlvs_set_dynamic_hostname(struct isis_tlvs *tlvs,
 657                                     const char *hostname);
 658 struct isis_router_cap *
 659 isis_tlvs_init_router_capability(struct isis_tlvs *tlvs);
 660
 661 struct isis_area;
 662 struct isis_flex_algo;
 663 void isis_tlvs_set_router_capability_fad(struct isis_tlvs *tlvs,
 664                                          struct flex_algo *fa, int algorithm,
 665                                          uint8_t *sysid);
 666
 667 struct isis_area;
 668
 669 int isis_tlvs_sr_algo_count(const struct isis_router_cap *cap);
 670
 671 void isis_tlvs_set_te_router_id(struct isis_tlvs *tlvs,
 672                                 const struct in_addr *id);
 673 void isis_tlvs_set_te_router_id_ipv6(struct isis_tlvs *tlvs,
 674                                      const struct in6_addr *id);
 675 void isis_tlvs_add_oldstyle_ip_reach(struct isis_tlvs *tlvs,
 676                                      struct prefix_ipv4 *dest, uint8_t metric);
 677 void isis_tlvs_add_extended_ip_reach(struct isis_tlvs *tlvs,
 678                                      struct prefix_ipv4 *dest, uint32_t metric,
 679                                      bool external,
 680                                      struct sr_prefix_cfg **pcfgs);
 681 void isis_tlvs_add_ipv6_reach(struct isis_tlvs *tlvs, uint16_t mtid,
 682                               struct prefix_ipv6 *dest, uint32_t metric,
 683                               bool external, struct sr_prefix_cfg **pcfgs);
 684 void isis_tlvs_add_ipv6_dstsrc_reach(struct isis_tlvs *tlvs, uint16_t mtid,
 685                                      struct prefix_ipv6 *dest,
 686                                      struct prefix_ipv6 *src,
 687                                      uint32_t metric);
 688 struct isis_ext_subtlvs *isis_alloc_ext_subtlvs(void);
 689 void isis_del_ext_subtlvs(struct isis_ext_subtlvs *ext);
 690 void isis_tlvs_add_adj_sid(struct isis_ext_subtlvs *exts,
 691                            struct isis_adj_sid *adj);
 692 void isis_tlvs_del_adj_sid(struct isis_ext_subtlvs *exts,
 693                            struct isis_adj_sid *adj);
 694 void isis_tlvs_add_lan_adj_sid(struct isis_ext_subtlvs *exts,
 695                                struct isis_lan_adj_sid *lan);
 696 void isis_tlvs_del_lan_adj_sid(struct isis_ext_subtlvs *exts,
 697                                struct isis_lan_adj_sid *lan);
 698
 699 void isis_tlvs_del_asla_flex_algo(struct isis_ext_subtlvs *ext,
 700                                   struct isis_asla_subtlvs *asla);
 701 struct isis_asla_subtlvs *
 702 isis_tlvs_find_alloc_asla(struct isis_ext_subtlvs *ext, uint8_t standard_apps);
 703 void isis_tlvs_free_asla(struct isis_ext_subtlvs *ext, uint8_t standard_apps);
 704
 705 void isis_tlvs_add_oldstyle_reach(struct isis_tlvs *tlvs, uint8_t *id,
 706                                   uint8_t metric);
 707 void isis_tlvs_add_extended_reach(struct isis_tlvs *tlvs, uint16_t mtid,
 708                                   uint8_t *id, uint32_t metric,
 709                                   struct isis_ext_subtlvs *subtlvs);
 710
 711 const char *isis_threeway_state_name(enum isis_threeway_state state);
 712
 713 void isis_tlvs_add_threeway_adj(struct isis_tlvs *tlvs,
 714                                 enum isis_threeway_state state,
 715                                 uint32_t local_circuit_id,
 716                                 const uint8_t *neighbor_id,
 717                                 uint32_t neighbor_circuit_id);
 718
 719 void isis_tlvs_add_spine_leaf(struct isis_tlvs *tlvs, uint8_t tier,
 720                               bool has_tier, bool is_leaf, bool is_spine,
 721                               bool is_backup);
 722
 723 struct isis_mt_router_info *
 724 isis_tlvs_lookup_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid);
 725
 726 void isis_tlvs_set_purge_originator(struct isis_tlvs *tlvs,
 727                                     const uint8_t *generator,
 728                                     const uint8_t *sender);
 729 #endif