Adding upstream version 9.1.upstream/9.1

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

1 files changed, 143 insertions, 0 deletions

diff --git a/isisd/isis_adjacency.h b/isisd/isis_adjacency.h
new file mode 100644
index 0000000..dc18105
--- /dev/null
+++ b/isisd/isis_adjacency.h
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * IS-IS Rout(e)ing protocol - isis_adjacency.h
+ *                             IS-IS adjacency handling
+ *
+ * Copyright (C) 2001,2002   Sampo Saaristo
+ *                           Tampere University of Technology
+ *                           Institute of Communications Engineering
+ *
+ */
+
+#ifndef _ZEBRA_ISIS_ADJACENCY_H
+#define _ZEBRA_ISIS_ADJACENCY_H
+
+#include "isisd/isis_tlvs.h"
+
+DECLARE_MTYPE(ISIS_ADJACENCY_INFO);
+
+enum isis_adj_usage {
+	ISIS_ADJ_NONE,
+	ISIS_ADJ_LEVEL1,
+	ISIS_ADJ_LEVEL2,
+	ISIS_ADJ_LEVEL1AND2
+};
+
+enum isis_system_type {
+	ISIS_SYSTYPE_UNKNOWN,
+	ISIS_SYSTYPE_ES,
+	ISIS_SYSTYPE_IS,
+	ISIS_SYSTYPE_L1_IS,
+	ISIS_SYSTYPE_L2_IS
+};
+
+enum isis_adj_state {
+	ISIS_ADJ_UNKNOWN,
+	ISIS_ADJ_INITIALIZING,
+	ISIS_ADJ_UP,
+	ISIS_ADJ_DOWN
+};
+
+/*
+ * we use the following codes to give an indication _why_
+ * a specific adjacency is up or down
+ */
+enum isis_adj_updown_reason {
+	ISIS_ADJ_REASON_SEENSELF,
+	ISIS_ADJ_REASON_AREA_MISMATCH,
+	ISIS_ADJ_REASON_HOLDTIMER_EXPIRED,
+	ISIS_ADJ_REASON_AUTH_FAILED,
+	ISIS_ADJ_REASON_CHECKSUM_FAILED
+};
+
+#define DIS_RECORDS 8	/* keep the last 8 DIS state changes on record */
+
+struct isis_dis_record {
+	int dis;		/* is our neighbor the DIS ? */
+	time_t last_dis_change; /* timestamp for last dis change */
+};
+
+struct bfd_session;
+struct isis_area;
+
+struct isis_adjacency {
+	uint8_t snpa[ETH_ALEN];		    /* NeighbourSNPAAddress */
+	uint8_t sysid[ISIS_SYS_ID_LEN];     /* neighbourSystemIdentifier */
+	uint8_t lanid[ISIS_SYS_ID_LEN + 1]; /* LAN id on bcast circuits */
+	int dischanges[ISIS_LEVELS];       /* how many DIS changes ? */
+	/* an array of N levels for M records */
+	struct isis_dis_record dis_record[DIS_RECORDS * ISIS_LEVELS];
+	enum isis_adj_state adj_state;    /* adjacencyState */
+	enum isis_adj_usage adj_usage;    /* adjacencyUsage */
+	struct iso_address *area_addresses; /* areaAdressesOfNeighbour */
+	unsigned int area_address_count;
+	struct nlpids nlpids; /* protocols spoken ... */
+	struct in_addr *ipv4_addresses;
+	unsigned int ipv4_address_count;
+	struct in_addr router_address;
+	struct in6_addr *ll_ipv6_addrs; /* Link local IPv6 neighbor address */
+	unsigned int ll_ipv6_count;
+	struct in6_addr *global_ipv6_addrs; /* Global IPv6 neighbor address */
+	unsigned int global_ipv6_count;
+	struct in6_addr router_address6;
+	uint8_t prio[ISIS_LEVELS];      /* priorityOfNeighbour for DIS */
+	int circuit_t;			/* from hello PDU hdr */
+	int level;			/* level (1 or 2) */
+	enum isis_system_type sys_type; /* neighbourSystemType */
+	uint16_t hold_time;		/* entryRemainingTime */
+	time_t last_upd;
+	time_t last_flap; /* last time the adj flapped */
+	enum isis_threeway_state threeway_state;
+	uint32_t ext_circuit_id;
+	int flaps;		      /* number of adjacency flaps  */
+	struct event *t_expire;	      /* expire after hold_time  */
+	struct isis_circuit *circuit; /* back pointer */
+	uint16_t *mt_set;      /* Topologies this adjacency is valid for */
+	unsigned int mt_count; /* Number of entries in mt_set */
+	struct bfd_session_params *bfd_session;
+	struct list *adj_sids; /* Segment Routing Adj-SIDs. */
+	uint32_t snmp_idx;
+	struct listnode *snmp_list_node;
+
+	struct list *srv6_endx_sids; /* SRv6 End.X SIDs. */
+};
+
+struct isis_threeway_adj;
+
+struct isis_adjacency *isis_adj_lookup(const uint8_t *sysid,
+				       struct list *adjdb);
+struct isis_adjacency *isis_adj_lookup_snpa(const uint8_t *ssnpa,
+					    struct list *adjdb);
+struct isis_adjacency *isis_adj_find(const struct isis_area *area, int level,
+				     const uint8_t *sysid);
+struct isis_adjacency *isis_new_adj(const uint8_t *id, const uint8_t *snpa,
+				    int level, struct isis_circuit *circuit);
+void isis_delete_adj(void *adj);
+void isis_adj_process_threeway(struct isis_adjacency *adj,
+			       struct isis_threeway_adj *tw_adj,
+			       enum isis_adj_usage adj_usage);
+DECLARE_HOOK(isis_adj_state_change_hook, (struct isis_adjacency *adj), (adj));
+DECLARE_HOOK(isis_adj_ip_enabled_hook,
+	     (struct isis_adjacency * adj, int family, bool global),
+	     (adj, family, global));
+DECLARE_HOOK(isis_adj_ip_disabled_hook,
+	     (struct isis_adjacency * adj, int family, bool global),
+	     (adj, family, global));
+void isis_log_adj_change(struct isis_adjacency *adj,
+			 enum isis_adj_state old_state,
+			 enum isis_adj_state new_state, const char *reason);
+void isis_adj_state_change(struct isis_adjacency **adj,
+			   enum isis_adj_state state, const char *reason);
+void isis_adj_print(struct isis_adjacency *adj);
+const char *isis_adj_yang_state(enum isis_adj_state state);
+void isis_adj_expire(struct event *thread);
+void isis_adj_print_vty(struct isis_adjacency *adj, struct vty *vty,
+			char detail);
+void isis_adj_print_json(struct isis_adjacency *adj, struct json_object *json,
+			 char detail);
+void isis_adj_build_neigh_list(struct list *adjdb, struct list *list);
+void isis_adj_build_up_list(struct list *adjdb, struct list *list);
+int isis_adj_usage2levels(enum isis_adj_usage usage);
+void isis_bfd_startup_timer(struct event *thread);
+const char *isis_adj_name(const struct isis_adjacency *adj);
+#endif /* ISIS_ADJACENCY_H */