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Diffstat (limited to 'isisd/isis_tlvs.h')
| -rw-r--r-- | isisd/isis_tlvs.h | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/isisd/isis_tlvs.h b/isisd/isis_tlvs.h new file mode 100644 index 0000000..905032b --- /dev/null +++ b/isisd/isis_tlvs.h @@ -0,0 +1,634 @@ +/* + * IS-IS TLV Serializer/Deserializer + * + * Copyright (C) 2015,2017 Christian Franke + + * Copyright (C) 2019 Olivier Dugeon - Orange Labs (for TE and SR) + * + * This file is part of FRR. + * + * FRR is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * FRR is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with FRR; see the file COPYING. If not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ +#ifndef ISIS_TLVS_H +#define ISIS_TLVS_H + +#include "openbsd-tree.h" +#include "prefix.h" + +DECLARE_MTYPE(ISIS_SUBTLV); + +struct lspdb_head; +struct sr_prefix_cfg; + +struct isis_area_address { + struct isis_area_address *next; + + uint8_t addr[20]; + uint8_t len; +}; + +#define ISIS_WIDE_METRIC_INFINITY 0xFFFFFE +#define ISIS_NARROW_METRIC_INFINITY 62 + +struct isis_oldstyle_reach { + struct isis_oldstyle_reach *next; + + uint8_t id[7]; + uint8_t metric; +}; + +struct isis_oldstyle_ip_reach { + struct isis_oldstyle_ip_reach *next; + + uint8_t metric; + struct prefix_ipv4 prefix; +}; + +struct isis_lsp_entry { + struct isis_lsp_entry *next; + + uint16_t rem_lifetime; + uint8_t id[8]; + uint16_t checksum; + uint32_t seqno; + + struct isis_lsp *lsp; +}; + +struct isis_extended_reach { + struct isis_extended_reach *next; + + uint8_t id[7]; + uint32_t metric; + + struct isis_ext_subtlvs *subtlvs; +}; + +struct isis_extended_ip_reach { + struct isis_extended_ip_reach *next; + + uint32_t metric; + bool down; + struct prefix_ipv4 prefix; + + struct isis_subtlvs *subtlvs; +}; + +struct isis_ipv6_reach { + struct isis_ipv6_reach *next; + + uint32_t metric; + bool down; + bool external; + + struct prefix_ipv6 prefix; + + struct isis_subtlvs *subtlvs; +}; + +struct isis_protocols_supported { + uint8_t count; + uint8_t *protocols; +}; + +#define ISIS_TIER_UNDEFINED 15 + +struct isis_spine_leaf { + uint8_t tier; + + bool has_tier; + bool is_leaf; + bool is_spine; + bool is_backup; +}; + +enum isis_threeway_state { + ISIS_THREEWAY_DOWN = 2, + ISIS_THREEWAY_INITIALIZING = 1, + ISIS_THREEWAY_UP = 0 +}; + +struct isis_threeway_adj { + enum isis_threeway_state state; + uint32_t local_circuit_id; + bool neighbor_set; + uint8_t neighbor_id[6]; + uint32_t neighbor_circuit_id; +}; + +/* Segment Routing subTLV's as per RFC8667 */ +#define ISIS_SUBTLV_SRGB_FLAG_I 0x80 +#define ISIS_SUBTLV_SRGB_FLAG_V 0x40 +#define IS_SR_IPV4(srgb) ((srgb)->flags & ISIS_SUBTLV_SRGB_FLAG_I) +#define IS_SR_IPV6(srgb) ((srgb)->flags & ISIS_SUBTLV_SRGB_FLAG_V) +#define SUBTLV_SR_BLOCK_SIZE 6 +#define SUBTLV_RANGE_INDEX_SIZE 10 +#define SUBTLV_RANGE_LABEL_SIZE 9 + +/* Structure aggregating SR Global (SRGB) or Local (SRLB) Block info */ +struct isis_sr_block { + uint8_t flags; + uint32_t range_size; + uint32_t lower_bound; +}; + +/* Prefix-SID sub-TLVs flags */ +#define ISIS_PREFIX_SID_READVERTISED 0x80 +#define ISIS_PREFIX_SID_NODE 0x40 +#define ISIS_PREFIX_SID_NO_PHP 0x20 +#define ISIS_PREFIX_SID_EXPLICIT_NULL 0x10 +#define ISIS_PREFIX_SID_VALUE 0x08 +#define ISIS_PREFIX_SID_LOCAL 0x04 + +struct isis_prefix_sid { + struct isis_prefix_sid *next; + + uint8_t flags; + uint8_t algorithm; + uint32_t value; +}; + +/* Adj-SID and LAN-Ajd-SID sub-TLVs flags */ +#define EXT_SUBTLV_LINK_ADJ_SID_FFLG 0x80 +#define EXT_SUBTLV_LINK_ADJ_SID_BFLG 0x40 +#define EXT_SUBTLV_LINK_ADJ_SID_VFLG 0x20 +#define EXT_SUBTLV_LINK_ADJ_SID_LFLG 0x10 +#define EXT_SUBTLV_LINK_ADJ_SID_SFLG 0x08 +#define EXT_SUBTLV_LINK_ADJ_SID_PFLG 0x04 + +struct isis_adj_sid { + struct isis_adj_sid *next; + + uint8_t family; + uint8_t flags; + uint8_t weight; + uint32_t sid; +}; + +struct isis_lan_adj_sid { + struct isis_lan_adj_sid *next; + + uint8_t family; + uint8_t flags; + uint8_t weight; + uint8_t neighbor_id[ISIS_SYS_ID_LEN]; + uint32_t sid; +}; + +/* RFC 4971 & RFC 7981 */ +#define ISIS_ROUTER_CAP_FLAG_S 0x01 +#define ISIS_ROUTER_CAP_FLAG_D 0x02 +#define ISIS_ROUTER_CAP_SIZE 5 + +/* Number of supported algorithm for Segment Routing. + * Right now only 2 have been standardized: + * - 0: SPF + * - 1: Strict SPF + */ +#define SR_ALGORITHM_COUNT 2 +#define SR_ALGORITHM_SPF 0 +#define SR_ALGORITHM_STRICT_SPF 1 +#define SR_ALGORITHM_UNSET 255 + +#define MSD_TYPE_BASE_MPLS_IMPOSITION 0x01 +#define MSD_TLV_SIZE 2 + +struct isis_router_cap { + struct in_addr router_id; + uint8_t flags; + + /* RFC 8667 section #3 */ + struct isis_sr_block srgb; + struct isis_sr_block srlb; + uint8_t algo[SR_ALGORITHM_COUNT]; + /* RFC 8491 */ + uint8_t msd; +}; + +struct isis_item { + struct isis_item *next; +}; + +struct isis_lan_neighbor { + struct isis_lan_neighbor *next; + + uint8_t mac[6]; +}; + +struct isis_ipv4_address { + struct isis_ipv4_address *next; + + struct in_addr addr; +}; + +struct isis_ipv6_address { + struct isis_ipv6_address *next; + + struct in6_addr addr; +}; + +struct isis_mt_router_info { + struct isis_mt_router_info *next; + + bool overload; + bool attached; + uint16_t mtid; +}; + +struct isis_auth { + struct isis_auth *next; + + uint8_t type; + uint8_t length; + uint8_t value[256]; + + uint8_t plength; + uint8_t passwd[256]; + + size_t offset; /* Only valid after packing */ +}; + +struct isis_item_list { + struct isis_item *head; + struct isis_item **tail; + + RB_ENTRY(isis_item_list) mt_tree; + uint16_t mtid; + unsigned int count; +}; + +struct isis_purge_originator { + bool sender_set; + + uint8_t generator[6]; + uint8_t sender[6]; +}; + +enum isis_auth_result { + ISIS_AUTH_OK = 0, + ISIS_AUTH_TYPE_FAILURE, + ISIS_AUTH_FAILURE, + ISIS_AUTH_NO_VALIDATOR, +}; + +RB_HEAD(isis_mt_item_list, isis_item_list); + +struct isis_item_list *isis_get_mt_items(struct isis_mt_item_list *m, + uint16_t mtid); +struct isis_item_list *isis_lookup_mt_items(struct isis_mt_item_list *m, + uint16_t mtid); + +struct isis_tlvs { + struct isis_item_list isis_auth; + struct isis_purge_originator *purge_originator; + struct isis_item_list area_addresses; + struct isis_item_list oldstyle_reach; + struct isis_item_list lan_neighbor; + struct isis_item_list lsp_entries; + struct isis_item_list extended_reach; + struct isis_mt_item_list mt_reach; + struct isis_item_list oldstyle_ip_reach; + struct isis_protocols_supported protocols_supported; + struct isis_item_list oldstyle_ip_reach_ext; + struct isis_item_list ipv4_address; + struct isis_item_list ipv6_address; + struct isis_item_list global_ipv6_address; + struct isis_item_list mt_router_info; + bool mt_router_info_empty; + struct in_addr *te_router_id; + struct in6_addr *te_router_id_ipv6; + struct isis_item_list extended_ip_reach; + struct isis_mt_item_list mt_ip_reach; + char *hostname; + struct isis_item_list ipv6_reach; + struct isis_mt_item_list mt_ipv6_reach; + struct isis_threeway_adj *threeway_adj; + struct isis_router_cap *router_cap; + struct isis_spine_leaf *spine_leaf; +}; + +enum isis_tlv_context { + ISIS_CONTEXT_LSP, + ISIS_CONTEXT_SUBTLV_NE_REACH, + ISIS_CONTEXT_SUBTLV_IP_REACH, + ISIS_CONTEXT_SUBTLV_IPV6_REACH, + ISIS_CONTEXT_MAX +}; + +struct isis_subtlvs { + enum isis_tlv_context context; + + /* draft-baker-ipv6-isis-dst-src-routing-06 */ + struct prefix_ipv6 *source_prefix; + /* RFC 8667 section #2.4 */ + struct isis_item_list prefix_sids; +}; + +enum isis_tlv_type { + /* TLVs code point */ + ISIS_TLV_AREA_ADDRESSES = 1, + ISIS_TLV_OLDSTYLE_REACH = 2, + ISIS_TLV_LAN_NEIGHBORS = 6, + ISIS_TLV_PADDING = 8, + ISIS_TLV_LSP_ENTRY = 9, + ISIS_TLV_AUTH = 10, + ISIS_TLV_PURGE_ORIGINATOR = 13, + ISIS_TLV_EXTENDED_REACH = 22, + + ISIS_TLV_OLDSTYLE_IP_REACH = 128, + ISIS_TLV_PROTOCOLS_SUPPORTED = 129, + ISIS_TLV_OLDSTYLE_IP_REACH_EXT = 130, + ISIS_TLV_IPV4_ADDRESS = 132, + ISIS_TLV_TE_ROUTER_ID = 134, + ISIS_TLV_EXTENDED_IP_REACH = 135, + ISIS_TLV_DYNAMIC_HOSTNAME = 137, + ISIS_TLV_TE_ROUTER_ID_IPV6 = 140, + ISIS_TLV_SPINE_LEAF_EXT = 150, + ISIS_TLV_MT_REACH = 222, + ISIS_TLV_MT_ROUTER_INFO = 229, + ISIS_TLV_IPV6_ADDRESS = 232, + ISIS_TLV_GLOBAL_IPV6_ADDRESS = 233, + ISIS_TLV_MT_IP_REACH = 235, + ISIS_TLV_IPV6_REACH = 236, + ISIS_TLV_MT_IPV6_REACH = 237, + ISIS_TLV_THREE_WAY_ADJ = 240, + ISIS_TLV_ROUTER_CAPABILITY = 242, + ISIS_TLV_MAX = 256, + + /* subTLVs code point */ + ISIS_SUBTLV_IPV6_SOURCE_PREFIX = 22, + + /* RFC 5305 & RFC 6119 */ + ISIS_SUBTLV_ADMIN_GRP = 3, + ISIS_SUBTLV_LOCAL_IPADDR = 6, + ISIS_SUBTLV_RMT_IPADDR = 8, + ISIS_SUBTLV_MAX_BW = 9, + ISIS_SUBTLV_MAX_RSV_BW = 10, + ISIS_SUBTLV_UNRSV_BW = 11, + ISIS_SUBTLV_LOCAL_IPADDR6 = 12, + ISIS_SUBTLV_RMT_IPADDR6 = 13, + ISIS_SUBTLV_TE_METRIC = 18, + + /* RFC 5307 */ + ISIS_SUBTLV_LLRI = 4, + + /* RFC 8491 */ + ISIS_SUBTLV_NODE_MSD = 23, + + /* RFC 5316 */ + ISIS_SUBTLV_RAS = 24, + ISIS_SUBTLV_RIP = 25, + + /* RFC 8667 section #4 IANA allocation */ + ISIS_SUBTLV_SID_LABEL = 1, + ISIS_SUBTLV_SID_LABEL_RANGE = 2, + ISIS_SUBTLV_ALGORITHM = 19, + ISIS_SUBTLV_SRLB = 22, + ISIS_SUBTLV_PREFIX_SID = 3, + ISIS_SUBTLV_ADJ_SID = 31, + ISIS_SUBTLV_LAN_ADJ_SID = 32, + + /* RFC 7810 */ + ISIS_SUBTLV_AV_DELAY = 33, + ISIS_SUBTLV_MM_DELAY = 34, + ISIS_SUBTLV_DELAY_VAR = 35, + ISIS_SUBTLV_PKT_LOSS = 36, + ISIS_SUBTLV_RES_BW = 37, + ISIS_SUBTLV_AVA_BW = 38, + ISIS_SUBTLV_USE_BW = 39, + + ISIS_SUBTLV_MAX = 40 +}; + +/* subTLVs size for TE and SR */ +enum ext_subtlv_size { + /* RFC 5307 */ + ISIS_SUBTLV_LLRI_SIZE = 8, + + /* RFC 5305 & RFC 6119 */ + ISIS_SUBTLV_UNRSV_BW_SIZE = 32, + ISIS_SUBTLV_TE_METRIC_SIZE = 3, + ISIS_SUBTLV_IPV6_ADDR_SIZE = 16, + + /* RFC 8491 */ + ISIS_SUBTLV_NODE_MSD_SIZE = 2, + + /* RFC 8667 sections #2 & #3 */ + ISIS_SUBTLV_SID_LABEL_SIZE = 3, + ISIS_SUBTLV_SID_INDEX_SIZE = 4, + ISIS_SUBTLV_SID_LABEL_RANGE_SIZE = 9, + ISIS_SUBTLV_ALGORITHM_SIZE = 4, + ISIS_SUBTLV_ADJ_SID_SIZE = 5, + ISIS_SUBTLV_LAN_ADJ_SID_SIZE = 11, + ISIS_SUBTLV_PREFIX_SID_SIZE = 5, + + /* RFC 7810 */ + ISIS_SUBTLV_MM_DELAY_SIZE = 8, + + ISIS_SUBTLV_HDR_SIZE = 2, + ISIS_SUBTLV_DEF_SIZE = 4, + + ISIS_SUBTLV_MAX_SIZE = 180 +}; + +/* Macros to manage the optional presence of EXT subTLVs */ +#define SET_SUBTLV(s, t) ((s->status) |= (t)) +#define UNSET_SUBTLV(s, t) ((s->status) &= ~(t)) +#define IS_SUBTLV(s, t) (s->status & t) + +#define EXT_DISABLE 0x000000 +#define EXT_ADM_GRP 0x000001 +#define EXT_LLRI 0x000002 +#define EXT_LOCAL_ADDR 0x000004 +#define EXT_NEIGH_ADDR 0x000008 +#define EXT_LOCAL_ADDR6 0x000010 +#define EXT_NEIGH_ADDR6 0x000020 +#define EXT_MAX_BW 0x000040 +#define EXT_MAX_RSV_BW 0x000080 +#define EXT_UNRSV_BW 0x000100 +#define EXT_TE_METRIC 0x000200 +#define EXT_RMT_AS 0x000400 +#define EXT_RMT_IP 0x000800 +#define EXT_ADJ_SID 0x001000 +#define EXT_LAN_ADJ_SID 0x002000 +#define EXT_DELAY 0x004000 +#define EXT_MM_DELAY 0x008000 +#define EXT_DELAY_VAR 0x010000 +#define EXT_PKT_LOSS 0x020000 +#define EXT_RES_BW 0x040000 +#define EXT_AVA_BW 0x080000 +#define EXT_USE_BW 0x100000 + +/* + * This structure groups all Extended IS Reachability subTLVs. + * + * Each bit of the status field indicates if a subTLVs is valid or not. + * SubTLVs values use following units: + * - Bandwidth in bytes/sec following IEEE format, + * - Delay in micro-seconds with only 24 bits significant + * - Packet Loss in percentage of total traffic with only 24 bits (2^24 - 2) + * + * For Delay and packet Loss, upper bit (A) indicates if the value is + * normal (0) or anomalous (1). + */ +#define IS_ANORMAL(v) (v & 0x80000000) + +struct isis_ext_subtlvs { + + uint32_t status; + + uint32_t adm_group; /* Resource Class/Color - RFC 5305 */ + /* Link Local/Remote Identifiers - RFC 5307 */ + uint32_t local_llri; + uint32_t remote_llri; + struct in_addr local_addr; /* Local IP Address - RFC 5305 */ + struct in_addr neigh_addr; /* Neighbor IP Address - RFC 5305 */ + struct in6_addr local_addr6; /* Local IPv6 Address - RFC 6119 */ + struct in6_addr neigh_addr6; /* Neighbor IPv6 Address - RFC 6119 */ + float max_bw; /* Maximum Bandwidth - RFC 5305 */ + float max_rsv_bw; /* Maximum Reservable Bandwidth - RFC 5305 */ + float unrsv_bw[8]; /* Unreserved Bandwidth - RFC 5305 */ + uint32_t te_metric; /* Traffic Engineering Metric - RFC 5305 */ + uint32_t remote_as; /* Remote AS Number sub-TLV - RFC5316 */ + struct in_addr remote_ip; /* IPv4 Remote ASBR ID Sub-TLV - RFC5316 */ + + uint32_t delay; /* Average Link Delay - RFC 8570 */ + uint32_t min_delay; /* Low Link Delay - RFC 8570 */ + uint32_t max_delay; /* High Link Delay - RFC 8570 */ + uint32_t delay_var; /* Link Delay Variation i.e. Jitter - RFC 8570 */ + uint32_t pkt_loss; /* Unidirectional Link Packet Loss - RFC 8570 */ + float res_bw; /* Unidirectional Residual Bandwidth - RFC 8570 */ + float ava_bw; /* Unidirectional Available Bandwidth - RFC 8570 */ + float use_bw; /* Unidirectional Utilized Bandwidth - RFC 8570 */ + + /* Segment Routing Adjacency & LAN Adjacency Segment ID */ + struct isis_item_list adj_sid; + struct isis_item_list lan_sid; +}; + +#define IS_COMPAT_MT_TLV(tlv_type) \ + ((tlv_type == ISIS_TLV_MT_REACH) || (tlv_type == ISIS_TLV_MT_IP_REACH) \ + || (tlv_type == ISIS_TLV_MT_IPV6_REACH)) + +struct stream; +int isis_pack_tlvs(struct isis_tlvs *tlvs, struct stream *stream, + size_t len_pointer, bool pad, bool is_lsp); +void isis_free_tlvs(struct isis_tlvs *tlvs); +struct isis_tlvs *isis_alloc_tlvs(void); +int isis_unpack_tlvs(size_t avail_len, struct stream *stream, + struct isis_tlvs **dest, const char **error_log); +const char *isis_format_tlvs(struct isis_tlvs *tlvs, struct json_object *json); +struct isis_tlvs *isis_copy_tlvs(struct isis_tlvs *tlvs); +struct list *isis_fragment_tlvs(struct isis_tlvs *tlvs, size_t size); + +#define ISIS_EXTENDED_IP_REACH_DOWN 0x80 +#define ISIS_EXTENDED_IP_REACH_SUBTLV 0x40 + +#define ISIS_IPV6_REACH_DOWN 0x80 +#define ISIS_IPV6_REACH_EXTERNAL 0x40 +#define ISIS_IPV6_REACH_SUBTLV 0x20 + +#ifndef ISIS_MT_MASK +#define ISIS_MT_MASK 0x0fff +#define ISIS_MT_OL_MASK 0x8000 +#define ISIS_MT_AT_MASK 0x4000 +#endif + +void isis_tlvs_add_auth(struct isis_tlvs *tlvs, struct isis_passwd *passwd); +void isis_tlvs_add_area_addresses(struct isis_tlvs *tlvs, + struct list *addresses); +void isis_tlvs_add_lan_neighbors(struct isis_tlvs *tlvs, + struct list *neighbors); +void isis_tlvs_set_protocols_supported(struct isis_tlvs *tlvs, + struct nlpids *nlpids); +void isis_tlvs_add_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid, + bool overload, bool attached); +void isis_tlvs_add_ipv4_address(struct isis_tlvs *tlvs, struct in_addr *addr); +void isis_tlvs_add_ipv4_addresses(struct isis_tlvs *tlvs, + struct list *addresses); +void isis_tlvs_add_ipv6_addresses(struct isis_tlvs *tlvs, + struct list *addresses); +void isis_tlvs_add_global_ipv6_addresses(struct isis_tlvs *tlvs, + struct list *addresses); +int isis_tlvs_auth_is_valid(struct isis_tlvs *tlvs, struct isis_passwd *passwd, + struct stream *stream, bool is_lsp); +bool isis_tlvs_area_addresses_match(struct isis_tlvs *tlvs, + struct list *addresses); +struct isis_adjacency; +void isis_tlvs_to_adj(struct isis_tlvs *tlvs, struct isis_adjacency *adj, + bool *changed); +bool isis_tlvs_own_snpa_found(struct isis_tlvs *tlvs, uint8_t *snpa); +void isis_tlvs_add_lsp_entry(struct isis_tlvs *tlvs, struct isis_lsp *lsp); +void isis_tlvs_add_csnp_entries(struct isis_tlvs *tlvs, uint8_t *start_id, + uint8_t *stop_id, uint16_t num_lsps, + struct lspdb_head *lspdb, + struct isis_lsp **last_lsp); +void isis_tlvs_set_dynamic_hostname(struct isis_tlvs *tlvs, + const char *hostname); +void isis_tlvs_set_router_capability(struct isis_tlvs *tlvs, + const struct isis_router_cap *cap); +void isis_tlvs_set_te_router_id(struct isis_tlvs *tlvs, + const struct in_addr *id); +void isis_tlvs_set_te_router_id_ipv6(struct isis_tlvs *tlvs, + const struct in6_addr *id); +void isis_tlvs_add_oldstyle_ip_reach(struct isis_tlvs *tlvs, + struct prefix_ipv4 *dest, uint8_t metric); +void isis_tlvs_add_extended_ip_reach(struct isis_tlvs *tlvs, + struct prefix_ipv4 *dest, uint32_t metric, + bool external, struct sr_prefix_cfg *pcfg); +void isis_tlvs_add_ipv6_reach(struct isis_tlvs *tlvs, uint16_t mtid, + struct prefix_ipv6 *dest, uint32_t metric, + bool external, struct sr_prefix_cfg *pcfg); +void isis_tlvs_add_ipv6_dstsrc_reach(struct isis_tlvs *tlvs, uint16_t mtid, + struct prefix_ipv6 *dest, + struct prefix_ipv6 *src, + uint32_t metric); +struct isis_ext_subtlvs *isis_alloc_ext_subtlvs(void); +void isis_del_ext_subtlvs(struct isis_ext_subtlvs *ext); +void isis_tlvs_add_adj_sid(struct isis_ext_subtlvs *exts, + struct isis_adj_sid *adj); +void isis_tlvs_del_adj_sid(struct isis_ext_subtlvs *exts, + struct isis_adj_sid *adj); +void isis_tlvs_add_lan_adj_sid(struct isis_ext_subtlvs *exts, + struct isis_lan_adj_sid *lan); +void isis_tlvs_del_lan_adj_sid(struct isis_ext_subtlvs *exts, + struct isis_lan_adj_sid *lan); + +void isis_tlvs_add_oldstyle_reach(struct isis_tlvs *tlvs, uint8_t *id, + uint8_t metric); +void isis_tlvs_add_extended_reach(struct isis_tlvs *tlvs, uint16_t mtid, + uint8_t *id, uint32_t metric, + struct isis_ext_subtlvs *subtlvs); + +const char *isis_threeway_state_name(enum isis_threeway_state state); + +void isis_tlvs_add_threeway_adj(struct isis_tlvs *tlvs, + enum isis_threeway_state state, + uint32_t local_circuit_id, + const uint8_t *neighbor_id, + uint32_t neighbor_circuit_id); + +void isis_tlvs_add_spine_leaf(struct isis_tlvs *tlvs, uint8_t tier, + bool has_tier, bool is_leaf, bool is_spine, + bool is_backup); + +struct isis_mt_router_info * +isis_tlvs_lookup_mt_router_info(struct isis_tlvs *tlvs, uint16_t mtid); + +void isis_tlvs_set_purge_originator(struct isis_tlvs *tlvs, + const uint8_t *generator, + const uint8_t *sender); +#endif |