isisd/isisd.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * IS-IS Rout(e)ing protocol - isisd.h
   4  *
   5  * Copyright (C) 2001,2002   Sampo Saaristo
   6  *                           Tampere University of Technology
   7  *                           Institute of Communications Engineering
   8  */
   9
  10 #ifndef ISISD_H
  11 #define ISISD_H
  12
  13 #include "vty.h"
  14 #include "memory.h"
  15
  16 #include "isisd/isis_constants.h"
  17 #include "isisd/isis_common.h"
  18 #include "isisd/isis_redist.h"
  19 #include "isisd/isis_pdu_counter.h"
  20 #include "isisd/isis_circuit.h"
  21 #include "isisd/isis_sr.h"
  22 #include "isis_flags.h"
  23 #include "isis_lsp.h"
  24 #include "isis_lfa.h"
  25 #include "qobj.h"
  26 #include "ldp_sync.h"
  27
  28 DECLARE_MGROUP(ISISD);
  29
  30 #ifdef FABRICD
  31 static const bool fabricd = true;
  32 #define PROTO_TYPE ZEBRA_ROUTE_OPENFABRIC
  33 #define PROTO_NAME "openfabric"
  34 #define PROTO_HELP "OpenFabric routing protocol\n"
  35 #define PROTO_REDIST_STR FRR_REDIST_STR_FABRICD
  36 #define PROTO_IP_REDIST_STR FRR_IP_REDIST_STR_FABRICD
  37 #define PROTO_IP6_REDIST_STR FRR_IP6_REDIST_STR_FABRICD
  38 #define PROTO_REDIST_HELP FRR_REDIST_HELP_STR_FABRICD
  39 #define PROTO_IP_REDIST_HELP FRR_IP_REDIST_HELP_STR_FABRICD
  40 #define PROTO_IP6_REDIST_HELP FRR_IP6_REDIST_HELP_STR_FABRICD
  41 #define ROUTER_NODE OPENFABRIC_NODE
  42 #else
  43 static const bool fabricd = false;
  44 #define PROTO_TYPE ZEBRA_ROUTE_ISIS
  45 #define PROTO_NAME "isis"
  46 #define PROTO_HELP "IS-IS routing protocol\n"
  47 #define PROTO_REDIST_STR FRR_REDIST_STR_ISISD
  48 #define PROTO_IP_REDIST_STR FRR_IP_REDIST_STR_ISISD
  49 #define PROTO_IP6_REDIST_STR FRR_IP6_REDIST_STR_ISISD
  50 #define PROTO_REDIST_HELP FRR_REDIST_HELP_STR_ISISD
  51 #define PROTO_IP_REDIST_HELP FRR_IP_REDIST_HELP_STR_ISISD
  52 #define PROTO_IP6_REDIST_HELP FRR_IP6_REDIST_HELP_STR_ISISD
  53 #define ROUTER_NODE ISIS_NODE
  54 extern void isis_cli_init(void);
  55 #endif
  56
  57 #define ISIS_FIND_VRF_ARGS(argv, argc, idx_vrf, vrf_name, all_vrf)             \
  58         if (argv_find(argv, argc, "vrf", &idx_vrf)) {                          \
  59                 vrf_name = argv[idx_vrf + 1]->arg;                             \
  60                 all_vrf = strmatch(vrf_name, "all");                           \
  61         }
  62
  63 extern struct zebra_privs_t isisd_privs;
  64
  65 /* uncomment if you are a developer in bug hunt */
  66 /* #define EXTREME_DEBUG  */
  67
  68 struct fabricd;
  69
  70 struct isis_master {
  71         /* ISIS instance. */
  72         struct list *isis;
  73         /* ISIS thread master. */
  74         struct thread_master *master;
  75         uint8_t options;
  76 };
  77 #define F_ISIS_UNIT_TEST 0x01
  78
  79 #define ISIS_DEFAULT_MAX_AREA_ADDRESSES 3
  80
  81 struct isis {
  82         vrf_id_t vrf_id;
  83         char *name;
  84         unsigned long process_id;
  85         int sysid_set;
  86         uint8_t sysid[ISIS_SYS_ID_LEN]; /* SystemID for this IS */
  87         uint32_t router_id;             /* Router ID from zebra */
  88         struct list *area_list; /* list of IS-IS areas */
  89         uint8_t max_area_addrs;           /* maximumAreaAdresses */
  90         struct area_addr *man_area_addrs; /* manualAreaAddresses */
  91         time_t uptime;                    /* when did we start */
  92         struct thread *t_dync_clean;      /* dynamic hostname cache cleanup thread */
  93         uint32_t circuit_ids_used[8];     /* 256 bits to track circuit ids 1 through 255 */
  94         int snmp_notifications;
  95         struct list *dyn_cache;
  96
  97         struct route_table *ext_info[REDIST_PROTOCOL_COUNT];
  98 };
  99
 100 extern struct isis_master *im;
 101
 102 extern struct thread *t_isis_cfg;
 103
 104 enum spf_tree_id {
 105         SPFTREE_IPV4 = 0,
 106         SPFTREE_IPV6,
 107         SPFTREE_DSTSRC,
 108         SPFTREE_COUNT
 109 };
 110
 111 struct lsp_refresh_arg {
 112         struct isis_area *area;
 113         int level;
 114 };
 115
 116 /* for yang configuration */
 117 enum isis_metric_style {
 118         ISIS_NARROW_METRIC = 0,
 119         ISIS_WIDE_METRIC,
 120         ISIS_TRANSITION_METRIC,
 121 };
 122
 123 struct isis_area {
 124         struct isis *isis;                             /* back pointer */
 125         struct lspdb_head lspdb[ISIS_LEVELS];          /* link-state dbs */
 126         struct isis_spftree *spftree[SPFTREE_COUNT][ISIS_LEVELS];
 127 #define DEFAULT_LSP_MTU 1497
 128         unsigned int lsp_mtu;      /* Size of LSPs to generate */
 129         struct list *circuit_list; /* IS-IS circuits */
 130         struct list *adjacency_list; /* IS-IS adjacencies */
 131         struct flags flags;
 132         struct thread *t_tick; /* LSP walker */
 133         struct thread *t_lsp_refresh[ISIS_LEVELS];
 134         struct thread *t_overload_on_startup_timer;
 135         struct timeval last_lsp_refresh_event[ISIS_LEVELS];
 136         struct thread *t_rlfa_rib_update;
 137         /* t_lsp_refresh is used in two ways:
 138          * a) regular refresh of LSPs
 139          * b) (possibly throttled) updates to LSPs
 140          *
 141          * The lsp_regenerate_pending flag tracks whether the timer is active
 142          * for the a) or the b) case.
 143          *
 144          * It is of utmost importance to clear this flag when the timer is
 145          * rescheduled for normal refresh, because otherwise, updates will
 146          * be delayed until the next regular refresh.
 147          */
 148         int lsp_regenerate_pending[ISIS_LEVELS];
 149
 150         bool bfd_signalled_down;
 151         bool bfd_force_spf_refresh;
 152
 153         struct fabricd *fabricd;
 154
 155         /*
 156          * Configurables
 157          */
 158         struct isis_passwd area_passwd;
 159         struct isis_passwd domain_passwd;
 160         /* do we support dynamic hostnames?  */
 161         char dynhostname;
 162         /* do we support new style metrics?  */
 163         char newmetric;
 164         char oldmetric;
 165         /* identifies the routing instance   */
 166         char *area_tag;
 167         /* area addresses for this area      */
 168         struct list *area_addrs;
 169         uint16_t max_lsp_lifetime[ISIS_LEVELS];
 170         char is_type; /* level-1 level-1-2 or level-2-only */
 171         /* are we overloaded? */
 172         char overload_bit;
 173         bool overload_configured;
 174         uint32_t overload_counter;
 175         uint32_t overload_on_startup_time;
 176         /* advertise prefixes of passive interfaces only? */
 177         bool advertise_passive_only;
 178         /* Are we advertising high metrics? */
 179         bool advertise_high_metrics;
 180         /* L1/L2 router identifier for inter-area traffic */
 181         char attached_bit_send;
 182         char attached_bit_rcv_ignore;
 183         uint16_t lsp_refresh[ISIS_LEVELS];
 184         /* minimum time allowed before lsp retransmission */
 185         uint16_t lsp_gen_interval[ISIS_LEVELS];
 186         /* min interval between between consequtive SPFs */
 187         uint16_t min_spf_interval[ISIS_LEVELS];
 188         /* the percentage of LSP mtu size used, before generating a new frag */
 189         int lsp_frag_threshold;
 190         uint64_t lsp_gen_count[ISIS_LEVELS];
 191         uint64_t lsp_purge_count[ISIS_LEVELS];
 192         uint32_t lsp_exceeded_max_counter;
 193         uint32_t lsp_seqno_skipped_counter;
 194         uint64_t spf_run_count[ISIS_LEVELS];
 195         int ip_circuits;
 196         /* logging adjacency changes? */
 197         uint8_t log_adj_changes;
 198         /* multi topology settings */
 199         struct list *mt_settings;
 200         /* MPLS-TE settings */
 201         struct mpls_te_area *mta;
 202         /* Segment Routing information */
 203         struct isis_sr_db srdb;
 204         int ipv6_circuits;
 205         bool purge_originator;
 206         /* SPF prefix priorities. */
 207         struct spf_prefix_priority_acl
 208                 spf_prefix_priorities[SPF_PREFIX_PRIO_MAX];
 209         /* Fast Re-Route information. */
 210         size_t lfa_protected_links[ISIS_LEVELS];
 211         size_t lfa_load_sharing[ISIS_LEVELS];
 212         enum spf_prefix_priority lfa_priority_limit[ISIS_LEVELS];
 213         struct lfa_tiebreaker_tree_head lfa_tiebreakers[ISIS_LEVELS];
 214         char *rlfa_plist_name[ISIS_LEVELS];
 215         struct prefix_list *rlfa_plist[ISIS_LEVELS];
 216         size_t rlfa_protected_links[ISIS_LEVELS];
 217         size_t tilfa_protected_links[ISIS_LEVELS];
 218         /* MPLS LDP-IGP Sync */
 219         struct ldp_sync_info_cmd ldp_sync_cmd;
 220         /* Counters */
 221         uint32_t circuit_state_changes;
 222         struct isis_redist redist_settings[REDIST_PROTOCOL_COUNT]
 223                                           [ZEBRA_ROUTE_MAX + 1][ISIS_LEVELS];
 224         struct route_table *ext_reach[REDIST_PROTOCOL_COUNT][ISIS_LEVELS];
 225
 226         struct spf_backoff *spf_delay_ietf[ISIS_LEVELS]; /*Structure with IETF
 227                                                             SPF algo
 228                                                             parameters*/
 229         struct thread *spf_timer[ISIS_LEVELS];
 230
 231         struct lsp_refresh_arg lsp_refresh_arg[ISIS_LEVELS];
 232
 233         pdu_counter_t pdu_tx_counters;
 234         pdu_counter_t pdu_rx_counters;
 235         uint64_t lsp_rxmt_count;
 236
 237         /* Area counters */
 238         uint64_t rej_adjacencies[2];
 239         uint64_t auth_type_failures[2];
 240         uint64_t auth_failures[2];
 241         uint64_t id_len_mismatches[2];
 242         uint64_t lsp_error_counter[2];
 243
 244         QOBJ_FIELDS;
 245 };
 246 DECLARE_QOBJ_TYPE(isis_area);
 247
 248 DECLARE_MTYPE(ISIS_ACL_NAME);   /* isis_area->spf_prefix_prioritites */
 249 DECLARE_MTYPE(ISIS_AREA_ADDR);  /* isis_area->area_addrs */
 250 DECLARE_MTYPE(ISIS_PLIST_NAME);
 251
 252 DECLARE_HOOK(isis_area_overload_bit_update, (struct isis_area * area), (area));
 253
 254 void isis_terminate(void);
 255 void isis_master_init(struct thread_master *master);
 256 void isis_vrf_link(struct isis *isis, struct vrf *vrf);
 257 void isis_vrf_unlink(struct isis *isis, struct vrf *vrf);
 258 struct isis *isis_lookup_by_vrfid(vrf_id_t vrf_id);
 259 struct isis *isis_lookup_by_vrfname(const char *vrfname);
 260 struct isis *isis_lookup_by_sysid(const uint8_t *sysid);
 261
 262 void isis_init(void);
 263 void isis_vrf_init(void);
 264
 265 struct isis *isis_new(const char *vrf_name);
 266 void isis_finish(struct isis *isis);
 267
 268 void isis_area_add_circuit(struct isis_area *area,
 269                            struct isis_circuit *circuit);
 270 void isis_area_del_circuit(struct isis_area *area,
 271                            struct isis_circuit *circuit);
 272
 273 struct isis_area *isis_area_create(const char *, const char *);
 274 struct isis_area *isis_area_lookup(const char *, vrf_id_t vrf_id);
 275 struct isis_area *isis_area_lookup_by_vrf(const char *area_tag,
 276                                           const char *vrf_name);
 277 int isis_area_get(struct vty *vty, const char *area_tag);
 278 void isis_area_destroy(struct isis_area *area);
 279 void isis_filter_update(struct access_list *access);
 280 void isis_prefix_list_update(struct prefix_list *plist);
 281 void print_debug(struct vty *, int, int);
 282 struct isis_lsp *lsp_for_sysid(struct lspdb_head *head, const char *sysid_str,
 283                                struct isis *isis);
 284
 285 void isis_area_invalidate_routes(struct isis_area *area, int levels);
 286 void isis_area_verify_routes(struct isis_area *area);
 287 void isis_area_switchover_routes(struct isis_area *area, int family,
 288                                  union g_addr *nexthop_ip, ifindex_t ifindex,
 289                                  int level);
 290
 291 void isis_area_overload_bit_set(struct isis_area *area, bool overload_bit);
 292 void isis_area_overload_on_startup_set(struct isis_area *area,
 293                                        uint32_t startup_time);
 294 void isis_area_advertise_high_metrics_set(struct isis_area *area,
 295                                           bool advertise_high_metrics);
 296 void isis_area_attached_bit_send_set(struct isis_area *area, bool attached_bit);
 297 void isis_area_attached_bit_receive_set(struct isis_area *area,
 298                                         bool attached_bit);
 299 void isis_area_dynhostname_set(struct isis_area *area, bool dynhostname);
 300 void isis_area_metricstyle_set(struct isis_area *area, bool old_metric,
 301                                bool new_metric);
 302 void isis_area_lsp_mtu_set(struct isis_area *area, unsigned int lsp_mtu);
 303 void isis_area_is_type_set(struct isis_area *area, int is_type);
 304 void isis_area_max_lsp_lifetime_set(struct isis_area *area, int level,
 305                                     uint16_t max_lsp_lifetime);
 306 void isis_area_lsp_refresh_set(struct isis_area *area, int level,
 307                                uint16_t lsp_refresh);
 308 /* IS_LEVEL_1 sets area_passwd, IS_LEVEL_2 domain_passwd */
 309 int isis_area_passwd_unset(struct isis_area *area, int level);
 310 int isis_area_passwd_cleartext_set(struct isis_area *area, int level,
 311                                    const char *passwd, uint8_t snp_auth);
 312 int isis_area_passwd_hmac_md5_set(struct isis_area *area, int level,
 313                                   const char *passwd, uint8_t snp_auth);
 314 void show_isis_database_lspdb_json(struct json_object *json,
 315                                    struct isis_area *area, int level,
 316                                    struct lspdb_head *lspdb, const char *argv,
 317                                    int ui_level);
 318 void show_isis_database_lspdb_vty(struct vty *vty, struct isis_area *area,
 319                                   int level, struct lspdb_head *lspdb,
 320                                   const char *argv, int ui_level);
 321 char *isis_restart_filepath(void);
 322 void isis_restart_write_overload_time(struct isis_area *isis_area,
 323                                       uint32_t overload_time);
 324 uint32_t isis_restart_read_overload_time(struct isis_area *isis_area);
 325 void config_end_lsp_generate(struct isis_area *area);
 326
 327 /* YANG paths */
 328 #define ISIS_INSTANCE   "/frr-isisd:isis/instance"
 329 #define ISIS_SR         "/frr-isisd:isis/instance/segment-routing"
 330
 331 /* Master of threads. */
 332 extern struct thread_master *master;
 333
 334 extern unsigned long debug_adj_pkt;
 335 extern unsigned long debug_snp_pkt;
 336 extern unsigned long debug_update_pkt;
 337 extern unsigned long debug_spf_events;
 338 extern unsigned long debug_rte_events;
 339 extern unsigned long debug_events;
 340 extern unsigned long debug_pkt_dump;
 341 extern unsigned long debug_lsp_gen;
 342 extern unsigned long debug_lsp_sched;
 343 extern unsigned long debug_flooding;
 344 extern unsigned long debug_bfd;
 345 extern unsigned long debug_tx_queue;
 346 extern unsigned long debug_sr;
 347 extern unsigned long debug_ldp_sync;
 348 extern unsigned long debug_lfa;
 349 extern unsigned long debug_te;
 350
 351 #define DEBUG_ADJ_PACKETS                (1<<0)
 352 #define DEBUG_SNP_PACKETS                (1<<1)
 353 #define DEBUG_UPDATE_PACKETS             (1<<2)
 354 #define DEBUG_SPF_EVENTS                 (1<<3)
 355 #define DEBUG_RTE_EVENTS                 (1<<4)
 356 #define DEBUG_EVENTS                     (1<<5)
 357 #define DEBUG_PACKET_DUMP                (1<<6)
 358 #define DEBUG_LSP_GEN                    (1<<7)
 359 #define DEBUG_LSP_SCHED                  (1<<8)
 360 #define DEBUG_FLOODING                   (1<<9)
 361 #define DEBUG_BFD                        (1<<10)
 362 #define DEBUG_TX_QUEUE                   (1<<11)
 363 #define DEBUG_SR                         (1<<12)
 364 #define DEBUG_LDP_SYNC                   (1<<13)
 365 #define DEBUG_LFA                        (1<<14)
 366 #define DEBUG_TE                         (1<<15)
 367
 368 /* Debug related macro. */
 369 #define IS_DEBUG_ADJ_PACKETS (debug_adj_pkt & DEBUG_ADJ_PACKETS)
 370 #define IS_DEBUG_SNP_PACKETS (debug_snp_pkt & DEBUG_SNP_PACKETS)
 371 #define IS_DEBUG_UPDATE_PACKETS (debug_update_pkt & DEBUG_UPDATE_PACKETS)
 372 #define IS_DEBUG_SPF_EVENTS (debug_spf_events & DEBUG_SPF_EVENTS)
 373 #define IS_DEBUG_RTE_EVENTS (debug_rte_events & DEBUG_RTE_EVENTS)
 374 #define IS_DEBUG_EVENTS (debug_events & DEBUG_EVENTS)
 375 #define IS_DEBUG_PACKET_DUMP (debug_pkt_dump & DEBUG_PACKET_DUMP)
 376 #define IS_DEBUG_LSP_GEN (debug_lsp_gen & DEBUG_LSP_GEN)
 377 #define IS_DEBUG_LSP_SCHED (debug_lsp_sched & DEBUG_LSP_SCHED)
 378 #define IS_DEBUG_FLOODING (debug_flooding & DEBUG_FLOODING)
 379 #define IS_DEBUG_BFD (debug_bfd & DEBUG_BFD)
 380 #define IS_DEBUG_TX_QUEUE (debug_tx_queue & DEBUG_TX_QUEUE)
 381 #define IS_DEBUG_SR (debug_sr & DEBUG_SR)
 382 #define IS_DEBUG_LDP_SYNC (debug_ldp_sync & DEBUG_LDP_SYNC)
 383 #define IS_DEBUG_LFA (debug_lfa & DEBUG_LFA)
 384 #define IS_DEBUG_TE (debug_te & DEBUG_TE)
 385
 386 #define lsp_debug(...)                                                         \
 387         do {                                                                   \
 388                 if (IS_DEBUG_LSP_GEN)                                          \
 389                         zlog_debug(__VA_ARGS__);                               \
 390         } while (0)
 391
 392 #define sched_debug(...)                                                       \
 393         do {                                                                   \
 394                 if (IS_DEBUG_LSP_SCHED)                                        \
 395                         zlog_debug(__VA_ARGS__);                               \
 396         } while (0)
 397
 398 #define sr_debug(...)                                                          \
 399         do {                                                                   \
 400                 if (IS_DEBUG_SR)                                               \
 401                         zlog_debug(__VA_ARGS__);                               \
 402         } while (0)
 403
 404 #define te_debug(...)                                                          \
 405         do {                                                                   \
 406                 if (IS_DEBUG_TE)                                               \
 407                         zlog_debug(__VA_ARGS__);                               \
 408         } while (0)
 409
 410 #endif /* ISISD_H */