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mirror_frr/isisd/isisd.h
lynne 77d73edfcd isisd: When adjacencies go up and down add support to modify attached-bit 
When adjacencies change state the attached-bits in LSPs in other areas
on the router may need to be modified.

 1. If a router no longer has a L2 adjacency to another area the
    attached-bit must no longer be sent in the LSP
 2. If a new L2 adjacency comes up in a different area then the
    attached-bit should be sent in the LSP

Signed-off-by: Lynne Morrison <lynne@voltanet.io>
2021-02-01 16:04:10 -05:00

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/*
* IS-IS Rout(e)ing protocol - isisd.h
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef ISISD_H
#define ISISD_H
#include "vty.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_redist.h"
#include "isisd/isis_pdu_counter.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_sr.h"
#include "isis_flags.h"
#include "isis_lsp.h"
#include "isis_lfa.h"
#include "isis_memory.h"
#include "qobj.h"
#include "ldp_sync.h"
#ifdef FABRICD
static const bool fabricd = true;
#define PROTO_TYPE ZEBRA_ROUTE_OPENFABRIC
#define PROTO_NAME "openfabric"
#define PROTO_HELP "OpenFabric routing protocol\n"
#define PROTO_REDIST_STR FRR_REDIST_STR_FABRICD
#define PROTO_REDIST_HELP FRR_REDIST_HELP_STR_FABRICD
#define ROUTER_NODE OPENFABRIC_NODE
#else
static const bool fabricd = false;
#define PROTO_TYPE ZEBRA_ROUTE_ISIS
#define PROTO_NAME "isis"
#define PROTO_HELP "IS-IS routing protocol\n"
#define PROTO_REDIST_STR FRR_REDIST_STR_ISISD
#define PROTO_REDIST_HELP FRR_REDIST_HELP_STR_ISISD
#define ROUTER_NODE ISIS_NODE
extern void isis_cli_init(void);
#endif
#define ISIS_FIND_VRF_ARGS(argv, argc, idx_vrf, vrf_name, all_vrf) \
if (argv_find(argv, argc, "vrf", &idx_vrf)) { \
vrf_name = argv[idx_vrf + 1]->arg; \
all_vrf = strmatch(vrf_name, "all"); \
}
extern struct zebra_privs_t isisd_privs;
/* uncomment if you are a developer in bug hunt */
/* #define EXTREME_DEBUG */
struct fabricd;
struct isis_master {
/* ISIS instance. */
struct list *isis;
/* ISIS thread master. */
struct thread_master *master;
uint8_t options;
};
#define F_ISIS_UNIT_TEST 0x01
struct isis {
vrf_id_t vrf_id;
char *name;
unsigned long process_id;
int sysid_set;
uint8_t sysid[ISIS_SYS_ID_LEN]; /* SystemID for this IS */
uint32_t router_id; /* Router ID from zebra */
struct list *area_list; /* list of IS-IS areas */
struct list *init_circ_list;
uint8_t max_area_addrs; /* maximumAreaAdresses */
struct area_addr *man_area_addrs; /* manualAreaAddresses */
time_t uptime; /* when did we start */
struct thread *t_dync_clean; /* dynamic hostname cache cleanup thread */
uint32_t circuit_ids_used[8]; /* 256 bits to track circuit ids 1 through 255 */
struct route_table *ext_info[REDIST_PROTOCOL_COUNT];
struct ldp_sync_info_cmd ldp_sync_cmd; /* MPLS LDP-IGP Sync */
};
extern struct isis_master *im;
enum spf_tree_id {
SPFTREE_IPV4 = 0,
SPFTREE_IPV6,
SPFTREE_DSTSRC,
SPFTREE_COUNT
};
struct lsp_refresh_arg {
struct isis_area *area;
int level;
};
/* for yang configuration */
enum isis_metric_style {
ISIS_NARROW_METRIC = 0,
ISIS_WIDE_METRIC,
ISIS_TRANSITION_METRIC,
};
struct isis_area {
struct isis *isis; /* back pointer */
struct lspdb_head lspdb[ISIS_LEVELS]; /* link-state dbs */
struct isis_spftree *spftree[SPFTREE_COUNT][ISIS_LEVELS];
#define DEFAULT_LSP_MTU 1497
unsigned int lsp_mtu; /* Size of LSPs to generate */
struct list *circuit_list; /* IS-IS circuits */
struct list *adjacency_list; /* IS-IS adjacencies */
struct flags flags;
struct thread *t_tick; /* LSP walker */
struct thread *t_lsp_refresh[ISIS_LEVELS];
struct timeval last_lsp_refresh_event[ISIS_LEVELS];
struct thread *t_rlfa_rib_update;
/* t_lsp_refresh is used in two ways:
* a) regular refresh of LSPs
* b) (possibly throttled) updates to LSPs
*
* The lsp_regenerate_pending flag tracks whether the timer is active
* for the a) or the b) case.
*
* It is of utmost importance to clear this flag when the timer is
* rescheduled for normal refresh, because otherwise, updates will
* be delayed until the next regular refresh.
*/
int lsp_regenerate_pending[ISIS_LEVELS];
bool bfd_signalled_down;
bool bfd_force_spf_refresh;
struct fabricd *fabricd;
/*
* Configurables
*/
struct isis_passwd area_passwd;
struct isis_passwd domain_passwd;
/* do we support dynamic hostnames? */
char dynhostname;
/* do we support new style metrics? */
char newmetric;
char oldmetric;
/* identifies the routing instance */
char *area_tag;
/* area addresses for this area */
struct list *area_addrs;
uint16_t max_lsp_lifetime[ISIS_LEVELS];
char is_type; /* level-1 level-1-2 or level-2-only */
/* are we overloaded? */
char overload_bit;
/* L1/L2 router identifier for inter-area traffic */
char attached_bit_send;
char attached_bit_rcv_ignore;
uint16_t lsp_refresh[ISIS_LEVELS];
/* minimum time allowed before lsp retransmission */
uint16_t lsp_gen_interval[ISIS_LEVELS];
/* min interval between between consequtive SPFs */
uint16_t min_spf_interval[ISIS_LEVELS];
/* the percentage of LSP mtu size used, before generating a new frag */
int lsp_frag_threshold;
uint64_t lsp_gen_count[ISIS_LEVELS];
uint64_t lsp_purge_count[ISIS_LEVELS];
int ip_circuits;
/* logging adjacency changes? */
uint8_t log_adj_changes;
/* multi topology settings */
struct list *mt_settings;
/* MPLS-TE settings */
struct mpls_te_area *mta;
/* Segment Routing information */
struct isis_sr_db srdb;
int ipv6_circuits;
bool purge_originator;
/* SPF prefix priorities. */
struct spf_prefix_priority_acl
spf_prefix_priorities[SPF_PREFIX_PRIO_MAX];
/* Fast Re-Route information. */
size_t lfa_protected_links[ISIS_LEVELS];
size_t lfa_load_sharing[ISIS_LEVELS];
enum spf_prefix_priority lfa_priority_limit[ISIS_LEVELS];
struct lfa_tiebreaker_tree_head lfa_tiebreakers[ISIS_LEVELS];
char *rlfa_plist_name[ISIS_LEVELS];
struct prefix_list *rlfa_plist[ISIS_LEVELS];
size_t rlfa_protected_links[ISIS_LEVELS];
size_t tilfa_protected_links[ISIS_LEVELS];
/* Counters */
uint32_t circuit_state_changes;
struct isis_redist redist_settings[REDIST_PROTOCOL_COUNT]
[ZEBRA_ROUTE_MAX + 1][ISIS_LEVELS];
struct route_table *ext_reach[REDIST_PROTOCOL_COUNT][ISIS_LEVELS];
struct spf_backoff *spf_delay_ietf[ISIS_LEVELS]; /*Structure with IETF
SPF algo
parameters*/
struct thread *spf_timer[ISIS_LEVELS];
struct lsp_refresh_arg lsp_refresh_arg[ISIS_LEVELS];
pdu_counter_t pdu_tx_counters;
pdu_counter_t pdu_rx_counters;
uint64_t lsp_rxmt_count;
QOBJ_FIELDS
};
DECLARE_QOBJ_TYPE(isis_area)
void isis_terminate(void);
void isis_finish(struct isis *isis);
void isis_master_init(struct thread_master *master);
void isis_vrf_link(struct isis *isis, struct vrf *vrf);
void isis_vrf_unlink(struct isis *isis, struct vrf *vrf);
void isis_global_instance_create(const char *vrf_name);
struct isis *isis_lookup_by_vrfid(vrf_id_t vrf_id);
struct isis *isis_lookup_by_vrfname(const char *vrfname);
struct isis *isis_lookup_by_sysid(const uint8_t *sysid);
void isis_init(void);
void isis_vrf_init(void);
struct isis *isis_new(const char *vrf_name);
struct isis_area *isis_area_create(const char *, const char *);
struct isis_area *isis_area_lookup(const char *, vrf_id_t vrf_id);
struct isis_area *isis_area_lookup_by_vrf(const char *area_tag,
const char *vrf_name);
int isis_area_get(struct vty *vty, const char *area_tag);
int isis_area_count(const struct isis *isis, int levels);
void isis_area_destroy(struct isis_area *area);
void isis_filter_update(struct access_list *access);
void isis_prefix_list_update(struct prefix_list *plist);
void print_debug(struct vty *, int, int);
struct isis_lsp *lsp_for_arg(struct lspdb_head *head, const char *argv,
struct isis *isis);
void isis_area_invalidate_routes(struct isis_area *area, int levels);
void isis_area_verify_routes(struct isis_area *area);
void isis_area_overload_bit_set(struct isis_area *area, bool overload_bit);
void isis_area_attached_bit_send_set(struct isis_area *area, bool attached_bit);
void isis_area_attached_bit_receive_set(struct isis_area *area,
bool attached_bit);
void isis_area_dynhostname_set(struct isis_area *area, bool dynhostname);
void isis_area_metricstyle_set(struct isis_area *area, bool old_metric,
bool new_metric);
void isis_area_lsp_mtu_set(struct isis_area *area, unsigned int lsp_mtu);
void isis_area_is_type_set(struct isis_area *area, int is_type);
void isis_area_max_lsp_lifetime_set(struct isis_area *area, int level,
uint16_t max_lsp_lifetime);
void isis_area_lsp_refresh_set(struct isis_area *area, int level,
uint16_t lsp_refresh);
/* IS_LEVEL_1 sets area_passwd, IS_LEVEL_2 domain_passwd */
int isis_area_passwd_unset(struct isis_area *area, int level);
int isis_area_passwd_cleartext_set(struct isis_area *area, int level,
const char *passwd, uint8_t snp_auth);
int isis_area_passwd_hmac_md5_set(struct isis_area *area, int level,
const char *passwd, uint8_t snp_auth);
void show_isis_database_lspdb(struct vty *vty, struct isis_area *area,
int level, struct lspdb_head *lspdb,
const char *argv, int ui_level);
/* YANG paths */
#define ISIS_INSTANCE "/frr-isisd:isis/instance"
#define ISIS_SR "/frr-isisd:isis/instance/segment-routing"
/* Master of threads. */
extern struct thread_master *master;
extern unsigned long debug_adj_pkt;
extern unsigned long debug_snp_pkt;
extern unsigned long debug_update_pkt;
extern unsigned long debug_spf_events;
extern unsigned long debug_rte_events;
extern unsigned long debug_events;
extern unsigned long debug_pkt_dump;
extern unsigned long debug_lsp_gen;
extern unsigned long debug_lsp_sched;
extern unsigned long debug_flooding;
extern unsigned long debug_bfd;
extern unsigned long debug_tx_queue;
extern unsigned long debug_sr;
extern unsigned long debug_ldp_sync;
extern unsigned long debug_lfa;
#define DEBUG_ADJ_PACKETS (1<<0)
#define DEBUG_SNP_PACKETS (1<<1)
#define DEBUG_UPDATE_PACKETS (1<<2)
#define DEBUG_SPF_EVENTS (1<<3)
#define DEBUG_RTE_EVENTS (1<<4)
#define DEBUG_EVENTS (1<<5)
#define DEBUG_PACKET_DUMP (1<<6)
#define DEBUG_LSP_GEN (1<<7)
#define DEBUG_LSP_SCHED (1<<8)
#define DEBUG_FLOODING (1<<9)
#define DEBUG_BFD (1<<10)
#define DEBUG_TX_QUEUE (1<<11)
#define DEBUG_SR (1<<12)
#define DEBUG_LDP_SYNC (1<<13)
#define DEBUG_LFA (1<<14)
/* Debug related macro. */
#define IS_DEBUG_ADJ_PACKETS (debug_adj_pkt & DEBUG_ADJ_PACKETS)
#define IS_DEBUG_SNP_PACKETS (debug_snp_pkt & DEBUG_SNP_PACKETS)
#define IS_DEBUG_UPDATE_PACKETS (debug_update_pkt & DEBUG_UPDATE_PACKETS)
#define IS_DEBUG_SPF_EVENTS (debug_spf_events & DEBUG_SPF_EVENTS)
#define IS_DEBUG_RTE_EVENTS (debug_rte_events & DEBUG_RTE_EVENTS)
#define IS_DEBUG_EVENTS (debug_events & DEBUG_EVENTS)
#define IS_DEBUG_PACKET_DUMP (debug_pkt_dump & DEBUG_PACKET_DUMP)
#define IS_DEBUG_LSP_GEN (debug_lsp_gen & DEBUG_LSP_GEN)
#define IS_DEBUG_LSP_SCHED (debug_lsp_sched & DEBUG_LSP_SCHED)
#define IS_DEBUG_FLOODING (debug_flooding & DEBUG_FLOODING)
#define IS_DEBUG_BFD (debug_bfd & DEBUG_BFD)
#define IS_DEBUG_TX_QUEUE (debug_tx_queue & DEBUG_TX_QUEUE)
#define IS_DEBUG_SR (debug_sr & DEBUG_SR)
#define IS_DEBUG_LDP_SYNC (debug_ldp_sync & DEBUG_LDP_SYNC)
#define IS_DEBUG_LFA (debug_lfa & DEBUG_LFA)
#define lsp_debug(...) \
do { \
if (IS_DEBUG_LSP_GEN) \
zlog_debug(__VA_ARGS__); \
} while (0)
#define sched_debug(...) \
do { \
if (IS_DEBUG_LSP_SCHED) \
zlog_debug(__VA_ARGS__); \
} while (0)
#define sr_debug(...) \
do { \
if (IS_DEBUG_SR) \
zlog_debug(__VA_ARGS__); \
} while (0)
#define DEBUG_TE DEBUG_LSP_GEN
#endif /* ISISD_H */
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