Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 426 insertions, 0 deletions

diff --git a/isisd/isisd.h b/isisd/isisd.h
new file mode 100644
index 0000000..f5042e4
--- /dev/null
+++ b/isisd/isisd.h
@@ -0,0 +1,426 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * IS-IS Rout(e)ing protocol - isisd.h
+ *
+ * Copyright (C) 2001,2002   Sampo Saaristo
+ *                           Tampere University of Technology
+ *                           Institute of Communications Engineering
+ */
+
+#ifndef ISISD_H
+#define ISISD_H
+
+#include "vty.h"
+#include "memory.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 "isisd/isis_srv6.h"
+#include "isis_flags.h"
+#include "isis_lsp.h"
+#include "isis_lfa.h"
+#include "qobj.h"
+#include "ldp_sync.h"
+#include "iso.h"
+
+DECLARE_MGROUP(ISISD);
+
+#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_IP_REDIST_STR FRR_IP_REDIST_STR_FABRICD
+#define PROTO_IP6_REDIST_STR FRR_IP6_REDIST_STR_FABRICD
+#define PROTO_REDIST_HELP FRR_REDIST_HELP_STR_FABRICD
+#define PROTO_IP_REDIST_HELP FRR_IP_REDIST_HELP_STR_FABRICD
+#define PROTO_IP6_REDIST_HELP FRR_IP6_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_IP_REDIST_STR FRR_IP_REDIST_STR_ISISD
+#define PROTO_IP6_REDIST_STR FRR_IP6_REDIST_STR_ISISD
+#define PROTO_REDIST_HELP FRR_REDIST_HELP_STR_ISISD
+#define PROTO_IP_REDIST_HELP FRR_IP_REDIST_HELP_STR_ISISD
+#define PROTO_IP6_REDIST_HELP FRR_IP6_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 event_loop *master;
+	uint8_t options;
+};
+#define F_ISIS_UNIT_TEST 0x01
+
+#define ISIS_DEFAULT_MAX_AREA_ADDRESSES 3
+
+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 */
+	uint8_t max_area_addrs;		  /* maximumAreaAdresses */
+	struct iso_address *man_area_addrs; /* manualAreaAddresses */
+	time_t uptime;			  /* when did we start */
+	struct event *t_dync_clean; /* dynamic hostname cache cleanup thread */
+	uint32_t circuit_ids_used[8];     /* 256 bits to track circuit ids 1 through 255 */
+	int snmp_notifications;
+	struct list *dyn_cache;
+
+	struct route_table *ext_info[REDIST_PROTOCOL_COUNT];
+};
+
+extern struct isis_master *im;
+
+extern struct event *t_isis_cfg;
+
+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 event *t_tick; /* LSP walker */
+	struct event *t_lsp_refresh[ISIS_LEVELS];
+	struct event *t_overload_on_startup_timer;
+	struct timeval last_lsp_refresh_event[ISIS_LEVELS];
+	struct event *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;
+	/* Allow sending the default admin-group value of 0x00000000. */
+	bool admin_group_send_zero;
+	/* Set the legacy flag (aka. L-FLAG) in the ASLA Sub-TLV */
+	bool asla_legacy_flag;
+	/* 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;
+	bool overload_configured;
+	uint32_t overload_counter;
+	uint32_t overload_on_startup_time;
+	/* advertise prefixes of passive interfaces only? */
+	bool advertise_passive_only;
+	/* Are we advertising high metrics? */
+	bool advertise_high_metrics;
+	/* 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];
+	uint32_t lsp_exceeded_max_counter;
+	uint32_t lsp_seqno_skipped_counter;
+	uint64_t spf_run_count[ISIS_LEVELS];
+	int ip_circuits;
+	/* logging adjacency changes? */
+	uint8_t log_adj_changes;
+	/* logging pdu drops? */
+	uint8_t log_pdu_drops;
+	/* multi topology settings */
+	struct list *mt_settings;
+	/* MPLS-TE settings */
+	struct mpls_te_area *mta;
+	/* Segment Routing information */
+	struct isis_sr_db srdb;
+	/* Segment Routing over IPv6 (SRv6) information */
+	struct isis_srv6_db srv6db;
+	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];
+	/* MPLS LDP-IGP Sync */
+	struct ldp_sync_info_cmd ldp_sync_cmd;
+#ifndef FABRICD
+	/* Flex-Algo */
+	struct flex_algos *flex_algos;
+#endif /* ifndef FABRICD */
+	/* Counters */
+	uint32_t circuit_state_changes;
+	struct list *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 event *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;
+	pdu_counter_t pdu_drop_counters;
+	uint64_t lsp_rxmt_count;
+
+	/* Area counters */
+	uint64_t rej_adjacencies[2];
+	uint64_t auth_type_failures[2];
+	uint64_t auth_failures[2];
+	uint64_t id_len_mismatches[2];
+	uint64_t lsp_error_counter[2];
+
+	QOBJ_FIELDS;
+};
+DECLARE_QOBJ_TYPE(isis_area);
+
+DECLARE_MTYPE(ISIS_ACL_NAME);	/* isis_area->spf_prefix_prioritites */
+DECLARE_MTYPE(ISIS_AREA_ADDR);	/* isis_area->area_addrs */
+DECLARE_MTYPE(ISIS_PLIST_NAME);
+
+DECLARE_HOOK(isis_area_overload_bit_update, (struct isis_area * area), (area));
+
+void isis_terminate(void);
+void isis_master_init(struct event_loop *master);
+void isis_vrf_link(struct isis *isis, struct vrf *vrf);
+void isis_vrf_unlink(struct isis *isis, struct vrf *vrf);
+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);
+void isis_finish(struct isis *isis);
+
+void isis_area_add_circuit(struct isis_area *area,
+			   struct isis_circuit *circuit);
+void isis_area_del_circuit(struct isis_area *area,
+			   struct isis_circuit *circuit);
+
+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);
+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_sysid(struct lspdb_head *head, const char *sysid_str,
+			       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_switchover_routes(struct isis_area *area, int family,
+				 union g_addr *nexthop_ip, ifindex_t ifindex,
+				 int level);
+
+void isis_area_overload_bit_set(struct isis_area *area, bool overload_bit);
+void isis_area_overload_on_startup_set(struct isis_area *area,
+				       uint32_t startup_time);
+void isis_area_advertise_high_metrics_set(struct isis_area *area,
+					  bool advertise_high_metrics);
+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_json(struct json_object *json,
+				   struct isis_area *area, int level,
+				   struct lspdb_head *lspdb, const char *argv,
+				   int ui_level);
+void show_isis_database_lspdb_vty(struct vty *vty, struct isis_area *area,
+				  int level, struct lspdb_head *lspdb,
+				  const char *argv, int ui_level);
+char *isis_restart_filepath(void);
+void isis_restart_write_overload_time(struct isis_area *isis_area,
+				      uint32_t overload_time);
+uint32_t isis_restart_read_overload_time(struct isis_area *isis_area);
+void config_end_lsp_generate(struct isis_area *area);
+
+/* YANG paths */
+#define ISIS_INSTANCE	"/frr-isisd:isis/instance"
+#define ISIS_SR		"/frr-isisd:isis/instance/segment-routing"
+#define ISIS_SRV6	"/frr-isisd:isis/instance/segment-routing-srv6"
+
+/* Master of threads. */
+extern struct event_loop *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;
+extern unsigned long debug_te;
+
+#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)
+#define DEBUG_TE                         (1<<15)
+
+/* 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 IS_DEBUG_TE (debug_te & DEBUG_TE)
+
+#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 te_debug(...)                                                          \
+	do {                                                                   \
+		if (IS_DEBUG_TE)                                               \
+			zlog_debug(__VA_ARGS__);                               \
+	} while (0)
+
+#endif /* ISISD_H */