Adding upstream version 9.1.upstream/9.1

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

1 files changed, 820 insertions, 0 deletions

diff --git a/ospfd/ospfd.h b/ospfd/ospfd.h
new file mode 100644
index 0000000..2ab7db1
--- /dev/null
+++ b/ospfd/ospfd.h
@@ -0,0 +1,820 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * OSPFd main header.
+ * Copyright (C) 1998, 99, 2000 Kunihiro Ishiguro, Toshiaki Takada
+ */
+
+#ifndef _ZEBRA_OSPFD_H
+#define _ZEBRA_OSPFD_H
+
+#include <zebra.h>
+#include "typesafe.h"
+#include "qobj.h"
+#include "libospf.h"
+#include "ldp_sync.h"
+
+#include "filter.h"
+#include "log.h"
+#include "vrf.h"
+
+#include "ospf_memory.h"
+#include "ospf_dump_api.h"
+
+#define OSPF_VERSION            2
+
+/* VTY port number. */
+#define OSPF_VTY_PORT          2604
+
+/* IP TTL for OSPF protocol. */
+#define OSPF_IP_TTL             1
+#define OSPF_VL_IP_TTL          100
+
+/* Default configuration file name for ospfd. */
+#define OSPF_DEFAULT_CONFIG   "ospfd.conf"
+
+#define OSPF_NSSA_TRANS_STABLE_DEFAULT		40
+
+#define OSPF_ALLSPFROUTERS              0xe0000005      /* 224.0.0.5 */
+#define OSPF_ALLDROUTERS                0xe0000006      /* 224.0.0.6 */
+
+/* OSPF Authentication Type. */
+#define OSPF_AUTH_NULL                      0
+#define OSPF_AUTH_SIMPLE                    1
+#define OSPF_AUTH_CRYPTOGRAPHIC             2
+/* For Interface authentication setting default */
+#define OSPF_AUTH_NOTSET                   -1
+/* For the consumption and sanity of the command handler */
+/* DO NIOT REMOVE!!! Need to detect whether a value has
+   been given or not in VLink command handlers */
+#define OSPF_AUTH_CMD_NOTSEEN              -2
+
+/* OSPF options. */
+#define OSPF_OPTION_MT                   0x01  /* M/T */
+#define OSPF_OPTION_E                    0x02
+#define OSPF_OPTION_MC                   0x04
+#define OSPF_OPTION_NP                   0x08
+#define OSPF_OPTION_EA                   0x10
+#define OSPF_OPTION_DC                   0x20
+#define OSPF_OPTION_O                    0x40
+#define OSPF_OPTION_DN                   0x80
+
+/* OSPF Database Description flags. */
+#define OSPF_DD_FLAG_MS                  0x01
+#define OSPF_DD_FLAG_M                   0x02
+#define OSPF_DD_FLAG_I                   0x04
+#define OSPF_DD_FLAG_ALL                 0x07
+
+#define OSPF_LS_REFRESH_SHIFT       (60 * 15)
+#define OSPF_LS_REFRESH_JITTER      60
+
+/* Default socket buffer size */
+#define OSPF_DEFAULT_SOCK_BUFSIZE   (8 * 1024 * 1024)
+
+/* OSPF config processing timer thread */
+extern struct event *t_ospf_cfg;
+
+struct ospf_external {
+	unsigned short instance;
+	struct route_table *external_info;
+};
+
+/* OSPF master for system wide configuration and variables. */
+struct ospf_master {
+	/* OSPF instance. */
+	struct list *ospf;
+
+	/* OSPF thread master. */
+	struct event_loop *master;
+
+	/* Various OSPF global configuration. */
+	uint8_t options;
+#define OSPF_MASTER_SHUTDOWN (1 << 0) /* deferred-shutdown */
+};
+
+struct ospf_redist {
+	unsigned short instance;
+
+	/* Redistribute metric info. */
+	struct {
+		int type;  /* External metric type (E1 or E2).  */
+		int value; /* Value for static metric (24-bit).
+			      -1 means metric value is not set. */
+	} dmetric;
+
+	/* For redistribute route map. */
+	struct {
+		char *name;
+		struct route_map *map;
+	} route_map; /* +1 is for default-information */
+#define ROUTEMAP_NAME(R)   (R->route_map.name)
+#define ROUTEMAP(R) (R->route_map.map)
+};
+
+/* OSPF area flood reduction info */
+struct ospf_area_fr_info {
+	bool enabled;       /* Area support for Flood Reduction */
+	bool configured;    /* Flood Reduction configured per area knob */
+	bool state_changed; /* flood reduction state change info */
+	int router_lsas_recv_dc_bit; /* Number of unique router lsas
+				      * received with DC bit set.
+				      * (excluding self)
+				      */
+	bool area_ind_lsa_recvd;     /* Indication lsa received in this area */
+	bool area_dc_clear;	  /* Area has atleast one lsa with dc bit 0(
+				      * excluding indication lsa)
+				      */
+	struct ospf_lsa *indication_lsa_self; /* Indication LSA generated
+					       * in the area.
+					       */
+};
+
+/* ospf->config */
+enum {
+	OSPF_RFC1583_COMPATIBLE =	(1 << 0),
+	OSPF_OPAQUE_CAPABLE =		(1 << 2),
+	OSPF_LOG_ADJACENCY_CHANGES =	(1 << 3),
+	OSPF_LOG_ADJACENCY_DETAIL =	(1 << 4),
+	OSPF_SEND_EXTRA_DATA_TO_ZEBRA =	(1 << 5),
+};
+
+/* TI-LFA */
+enum protection_type {
+	OSPF_TI_LFA_UNDEFINED_PROTECTION,
+	OSPF_TI_LFA_LINK_PROTECTION,
+	OSPF_TI_LFA_NODE_PROTECTION,
+};
+
+/* OSPF nonstop forwarding aka Graceful Restart */
+struct ospf_gr_info {
+	bool restart_support;
+	bool restart_in_progress;
+	bool prepare_in_progress;
+	bool finishing_restart;
+	uint32_t grace_period;
+	int reason;
+	char *exit_reason;
+	struct event *t_grace_period;
+};
+
+/* OSPF instance structure. */
+struct ospf {
+	/* OSPF's running state based on the '[no] router ospf [<instance>]'
+	 * config. */
+	uint8_t oi_running;
+
+	/* OSPF instance ID  */
+	unsigned short instance;
+
+	/* OSPF Router ID. */
+	struct in_addr router_id;	/* Configured automatically. */
+	struct in_addr router_id_static; /* Configured manually. */
+	struct in_addr router_id_zebra;
+
+	vrf_id_t vrf_id; /* VRF Id */
+	char *name;      /* VRF name */
+
+	/* ABR/ASBR internal flags. */
+	uint8_t flags;
+#define OSPF_FLAG_ABR           0x0001
+#define OSPF_FLAG_ASBR          0x0002
+
+	/* ABR type. */
+	uint8_t abr_type;
+#define OSPF_ABR_UNKNOWN	0
+#define OSPF_ABR_STAND          1
+#define OSPF_ABR_IBM            2
+#define OSPF_ABR_CISCO          3
+#define OSPF_ABR_SHORTCUT       4
+#define OSPF_ABR_DEFAULT	OSPF_ABR_CISCO
+
+	/* NSSA ABR */
+	uint8_t anyNSSA; /* Bump for every NSSA attached. */
+
+	/* Configuration bitmask, refer to enum above */
+	uint8_t config;
+
+	/* Opaque-LSA administrative flags. */
+	uint8_t opaque;
+#define OPAQUE_OPERATION_READY_BIT	(1 << 0)
+
+	/* RFC3137 stub router. Configured time to stay stub / max-metric */
+	unsigned int stub_router_startup_time;  /* seconds */
+	unsigned int stub_router_shutdown_time; /* seconds */
+#define OSPF_STUB_ROUTER_UNCONFIGURED	  0
+	uint8_t stub_router_admin_set;
+#define OSPF_STUB_ROUTER_ADMINISTRATIVE_SET     1
+#define OSPF_STUB_ROUTER_ADMINISTRATIVE_UNSET   0
+
+#define OSPF_STUB_MAX_METRIC_SUMMARY_COST	0x00ff0000
+
+	/* LSA timers */
+	unsigned int min_ls_interval; /* minimum delay between LSAs (in msec) */
+	unsigned int min_ls_arrival;  /* minimum interarrival time between LSAs
+					 (in msec) */
+
+	/* SPF parameters */
+	unsigned int spf_delay;	/* SPF delay time. */
+	unsigned int spf_holdtime;     /* SPF hold time. */
+	unsigned int spf_max_holdtime; /* SPF maximum-holdtime */
+	unsigned int
+		spf_hold_multiplier; /* Adaptive multiplier for hold time */
+
+	int default_originate;	/* Default information originate. */
+#define DEFAULT_ORIGINATE_NONE		0
+#define DEFAULT_ORIGINATE_ZEBRA		1
+#define DEFAULT_ORIGINATE_ALWAYS	2
+	uint32_t ref_bandwidth;       /* Reference Bandwidth (Kbps). */
+	struct route_table *networks; /* OSPF config networks. */
+	struct list *vlinks;	  /* Configured Virtual-Links. */
+	struct list *areas;	   /* OSPF areas. */
+	struct route_table *nbr_nbma;
+	struct ospf_area *backbone; /* Pointer to the Backbone Area. */
+
+	struct list *oiflist;		  /* ospf interfaces */
+	uint8_t passive_interface_default; /* passive-interface default */
+
+	/* LSDB of AS-external-LSAs. */
+	struct ospf_lsdb *lsdb;
+
+	/* Flags. */
+	int ase_calc;	/* ASE calculation flag. */
+
+	struct list *opaque_lsa_self; /* Type-11 Opaque-LSAs */
+
+	/* Routing tables. */
+	struct route_table *old_table; /* Old routing table. */
+	struct route_table *new_table; /* Current routing table. */
+
+	struct route_table *oall_rtrs; /* Old router RT. */
+	struct route_table *all_rtrs;  /* New routers RT. */
+
+	struct route_table *old_rtrs; /* Old ABR/ASBR RT. */
+	struct route_table *new_rtrs; /* New ABR/ASBR RT. */
+
+	struct route_table *new_external_route; /* New External Route. */
+	struct route_table *old_external_route; /* Old External Route. */
+
+	struct route_table *external_lsas; /* Database of external LSAs,
+					      prefix is LSA's adv. network*/
+
+	/* Time stamps */
+	struct timeval ts_spf;		/* SPF calculation time stamp. */
+	struct timeval ts_spf_duration; /* Execution time of last SPF */
+
+	struct route_table *maxage_lsa; /* List of MaxAge LSA for deletion. */
+	int redistribute;		/* Num of redistributed protocols. */
+
+	/* Threads. */
+	struct event *t_abr_task;		 /* ABR task timer. */
+	struct event *t_abr_fr;			 /* ABR FR timer. */
+	struct event *t_asbr_check;		 /* ASBR check timer. */
+	struct event *t_asbr_redist_update; /* ASBR redistribution update
+					       timer. */
+	struct event *t_distribute_update; /* Distirbute list update timer. */
+	struct event *t_spf_calc;	   /* SPF calculation timer. */
+	struct event *t_ase_calc;	   /* ASE calculation timer. */
+	struct event *t_opaque_lsa_self; /* Type-11 Opaque-LSAs origin event. */
+	struct event *t_sr_update;	 /* Segment Routing update timer */
+
+	unsigned int maxage_delay;      /* Delay on Maxage remover timer, sec */
+	struct event *t_maxage;		/* MaxAge LSA remover timer. */
+	struct event *t_maxage_walker;	/* MaxAge LSA checking timer. */
+
+	struct event
+		*t_deferred_shutdown; /* deferred/stub-router shutdown timer*/
+
+	struct event *t_write;
+#define OSPF_WRITE_INTERFACE_COUNT_DEFAULT    20
+	struct event *t_default_routemap_timer;
+
+	int write_oi_count; /* Num of packets sent per thread invocation */
+	struct event *t_read;
+	int fd;
+	struct stream *ibuf;
+	struct list *oi_write_q;
+
+	/* Distribute lists out of other route sources. */
+	struct {
+		char *name;
+		struct access_list *list;
+	} dlist[ZEBRA_ROUTE_MAX];
+#define DISTRIBUTE_NAME(O,T)    (O)->dlist[T].name
+#define DISTRIBUTE_LIST(O,T)    (O)->dlist[T].list
+
+	/* OSPF redistribute configuration */
+	struct list *redist[ZEBRA_ROUTE_MAX + 1];
+
+	/* Redistribute tag info. */
+	route_tag_t
+		dtag[ZEBRA_ROUTE_MAX + 1]; // Pending: cant configure as of now
+
+	int default_metric; /* Default metric for redistribute. */
+
+	/* NSSA default-information-originate */
+	struct {
+		/* # of NSSA areas requesting default information */
+		uint16_t refcnt;
+
+		/*
+		 * Whether a default route known through non-OSPF protocol is
+		 * present in the RIB.
+		 */
+		bool status;
+	} nssa_default_import_check;
+
+#define OSPF_LSA_REFRESHER_GRANULARITY 10
+#define OSPF_LSA_REFRESHER_SLOTS                                               \
+	((OSPF_LS_REFRESH_TIME + OSPF_LS_REFRESH_SHIFT)                        \
+		 / OSPF_LSA_REFRESHER_GRANULARITY                              \
+	 + 1)
+	struct {
+		uint16_t index;
+		struct list *qs[OSPF_LSA_REFRESHER_SLOTS];
+	} lsa_refresh_queue;
+
+	struct event *t_lsa_refresher;
+	time_t lsa_refresher_started;
+#define OSPF_LSA_REFRESH_INTERVAL_DEFAULT 10
+	uint16_t lsa_refresh_interval;
+	uint16_t lsa_refresh_timer;
+
+	/* Distance parameter. */
+	uint8_t distance_all;
+	uint8_t distance_intra;
+	uint8_t distance_inter;
+	uint8_t distance_external;
+
+	/* Statistics for LSA origination. */
+	uint32_t lsa_originate_count;
+
+	/* Statistics for LSA used for new instantiation. */
+	uint32_t rx_lsa_count;
+
+	struct route_table *distance_table;
+
+	/* Used during ospf instance going down send LSDB
+	 * update to neighbors immediatly */
+	uint8_t inst_shutdown;
+
+	/* Enable or disable sending proactive ARP requests. */
+	bool proactive_arp;
+#define OSPF_PROACTIVE_ARP_DEFAULT true
+
+	/* Redistributed external information. */
+	struct list *external[ZEBRA_ROUTE_MAX + 1];
+#define EXTERNAL_INFO(E) (E->external_info)
+
+	/* Graceful restart Helper supported configs*/
+	/* Supported grace interval*/
+	uint32_t supported_grace_time;
+
+	/* Helper support
+	 * Supported : True
+	 * Not Supported : False.
+	 */
+	bool is_helper_supported;
+
+	/* Support for strict LSA check.
+	 * if it is set,Helper aborted
+	 * upon a TOPO change.
+	 */
+	bool strict_lsa_check;
+
+	/* Support as HELPER only for
+	 * planned restarts.
+	 */
+	bool only_planned_restart;
+
+	/* This list contains the advertisement
+	 * routerids which are not support for HELPERs.
+	 */
+	struct hash *enable_rtr_list;
+
+	/* HELPER for number of active
+	 * RESTARTERs.
+	 */
+	uint16_t active_restarter_cnt;
+
+	/* last HELPER exit reason */
+	uint32_t last_exit_reason;
+
+	/* delay timer to process external routes
+	 * with summary address.
+	 */
+	struct event *t_external_aggr;
+
+	/* delay interval in seconds */
+	uint16_t aggr_delay_interval;
+
+	/* Table of configured Aggregate addresses */
+	struct route_table *rt_aggr_tbl;
+
+	/* used as argument for aggr delay
+	 * timer thread.
+	 */
+	int aggr_action;
+
+	/* Max number of multiple paths
+	 * to support ECMP.
+	 */
+	uint16_t max_multipath;
+
+	/* MPLS LDP-IGP Sync */
+	struct ldp_sync_info_cmd ldp_sync_cmd;
+
+	/* OSPF Graceful Restart info */
+	struct ospf_gr_info gr_info;
+
+	/* TI-LFA support for all interfaces. */
+	bool ti_lfa_enabled;
+	enum protection_type ti_lfa_protection_type;
+
+	/* Flood Reduction configuration state */
+	bool fr_configured;
+
+	/* Socket buffer sizes */
+	uint32_t recv_sock_bufsize;
+	uint32_t send_sock_bufsize;
+
+	/* Per-interface write socket */
+	bool intf_socket_enabled;
+
+	QOBJ_FIELDS;
+};
+DECLARE_QOBJ_TYPE(ospf);
+
+enum ospf_ti_lfa_p_q_space_adjacency {
+	OSPF_TI_LFA_P_Q_SPACE_ADJACENT,
+	OSPF_TI_LFA_P_Q_SPACE_NON_ADJACENT,
+};
+
+enum ospf_ti_lfa_node_type {
+	OSPF_TI_LFA_UNDEFINED_NODE,
+	OSPF_TI_LFA_PQ_NODE,
+	OSPF_TI_LFA_P_NODE,
+	OSPF_TI_LFA_Q_NODE,
+};
+
+struct ospf_ti_lfa_node_info {
+	struct vertex *node;
+	enum ospf_ti_lfa_node_type type;
+	struct in_addr nexthop;
+};
+
+struct ospf_ti_lfa_inner_backup_path_info {
+	struct ospf_ti_lfa_node_info p_node_info;
+	struct ospf_ti_lfa_node_info q_node_info;
+	struct mpls_label_stack *label_stack;
+};
+
+struct protected_resource {
+	enum protection_type type;
+
+	/* Link Protection */
+	struct router_lsa_link *link;
+
+	/* Node Protection */
+	struct in_addr router_id;
+};
+
+PREDECL_RBTREE_UNIQ(q_spaces);
+struct q_space {
+	struct vertex *root;
+	struct list *vertex_list;
+	struct mpls_label_stack *label_stack;
+	struct in_addr nexthop;
+	struct list *pc_path;
+	struct ospf_ti_lfa_node_info *p_node_info;
+	struct ospf_ti_lfa_node_info *q_node_info;
+	struct q_spaces_item q_spaces_item;
+};
+
+PREDECL_RBTREE_UNIQ(p_spaces);
+struct p_space {
+	struct vertex *root;
+	struct protected_resource *protected_resource;
+	struct q_spaces_head *q_spaces;
+	struct list *vertex_list;
+	struct vertex *pc_spf;
+	struct list *pc_vertex_list;
+	struct p_spaces_item p_spaces_item;
+};
+
+/* OSPF area structure. */
+struct ospf_area {
+	/* OSPF instance. */
+	struct ospf *ospf;
+
+	/* Zebra interface list belonging to the area. */
+	struct list *oiflist;
+
+	/* Area ID. */
+	struct in_addr area_id;
+
+	/* Area ID format. */
+	int area_id_fmt;
+#define OSPF_AREA_ID_FMT_DOTTEDQUAD     1
+#define OSPF_AREA_ID_FMT_DECIMAL        2
+
+	/* Address range. */
+	struct list *address_range;
+
+	/* Configured variables. */
+	int external_routing;    /* ExternalRoutingCapability. */
+	int no_summary;		 /* Don't inject summaries into stub.*/
+	int shortcut_configured; /* Area configured as shortcut. */
+#define OSPF_SHORTCUT_DEFAULT	0
+#define OSPF_SHORTCUT_ENABLE	1
+#define OSPF_SHORTCUT_DISABLE	2
+	int shortcut_capability; /* Other ABRs agree on S-bit */
+	uint32_t default_cost;   /* StubDefaultCost. */
+	int auth_type;		 /* Authentication type. */
+	int suppress_fa;	 /* Suppress forwarding address in NSSA ABR */
+
+	uint8_t NSSATranslatorRole; /* NSSA configured role */
+#define OSPF_NSSA_ROLE_NEVER     0
+#define OSPF_NSSA_ROLE_CANDIDATE 1
+#define OSPF_NSSA_ROLE_ALWAYS    2
+	uint8_t NSSATranslatorState; /* NSSA operational role */
+#define OSPF_NSSA_TRANSLATE_DISABLED 0
+#define OSPF_NSSA_TRANSLATE_ENABLED  1
+	int NSSATranslatorStabilityInterval;
+
+	uint8_t transit; /* TransitCapability. */
+#define OSPF_TRANSIT_FALSE      0
+#define OSPF_TRANSIT_TRUE       1
+	struct route_table *ranges; /* Configured Area Ranges. */
+	struct route_table *nssa_ranges; /* Configured NSSA Area Ranges. */
+
+	/* RFC3137 stub router state flags for area */
+	uint8_t stub_router_state;
+#define OSPF_AREA_ADMIN_STUB_ROUTED	(1 << 0) /* admin stub-router set */
+#define OSPF_AREA_IS_STUB_ROUTED	(1 << 1) /* stub-router active */
+#define OSPF_AREA_WAS_START_STUB_ROUTED	(1 << 2) /* startup SR was done */
+	/* Area related LSDBs[Type1-4]. */
+	struct ospf_lsdb *lsdb;
+
+	/* Self-originated LSAs. */
+	struct ospf_lsa *router_lsa_self;
+	struct list *opaque_lsa_self; /* Type-10 Opaque-LSAs */
+
+	/* Area announce list. */
+	struct {
+		char *name;
+		struct access_list *list;
+	} _export;
+#define EXPORT_NAME(A)  (A)->_export.name
+#define EXPORT_LIST(A)  (A)->_export.list
+
+	/* Area acceptance list. */
+	struct {
+		char *name;
+		struct access_list *list;
+	} import;
+#define IMPORT_NAME(A)  (A)->import.name
+#define IMPORT_LIST(A)  (A)->import.list
+
+	/* Type 3 LSA Area prefix-list. */
+	struct {
+		char *name;
+		struct prefix_list *list;
+	} plist_in;
+#define PREFIX_LIST_IN(A)   (A)->plist_in.list
+#define PREFIX_NAME_IN(A)   (A)->plist_in.name
+
+	struct {
+		char *name;
+		struct prefix_list *list;
+	} plist_out;
+#define PREFIX_LIST_OUT(A)  (A)->plist_out.list
+#define PREFIX_NAME_OUT(A)  (A)->plist_out.name
+
+	/* NSSA default-information-originate */
+	struct {
+		bool enabled;
+		int metric_type;
+		int metric_value;
+	} nssa_default_originate;
+
+	/* Shortest Path Tree. */
+	struct vertex *spf;
+	struct list *spf_vertex_list;
+
+	bool spf_dry_run;   /* flag for checking if the SPF calculation is
+			       intended for the local RIB */
+	bool spf_root_node; /* flag for checking if the calculating node is the
+			       root node of the SPF tree */
+
+	/* TI-LFA protected link for SPF calculations */
+	struct protected_resource *spf_protected_resource;
+
+	/* P/Q spaces for TI-LFA */
+	struct p_spaces_head *p_spaces;
+
+	/* Threads. */
+	struct event *t_stub_router;	 /* Stub-router timer */
+	struct event *t_opaque_lsa_self; /* Type-10 Opaque-LSAs origin. */
+
+	/* Statistics field. */
+	uint32_t spf_calculation; /* SPF Calculation Count. */
+
+	/* reverse SPF (used for TI-LFA Q spaces) */
+	bool spf_reversed;
+
+	/* Time stamps. */
+	struct timeval ts_spf; /* SPF calculation time stamp. */
+
+	/* Router count. */
+	uint32_t abr_count;  /* ABR router in this area. */
+	uint32_t asbr_count; /* ASBR router in this area. */
+
+	/* Counters. */
+	uint32_t act_ints;  /* Active interfaces. */
+	uint32_t full_nbrs; /* Fully adjacent neighbors. */
+	uint32_t full_vls;  /* Fully adjacent virtual neighbors. */
+
+	struct ospf_area_fr_info fr_info; /* Flood reduction info. */
+};
+
+/* OSPF config network structure. */
+struct ospf_network {
+	/* Area ID. */
+	struct in_addr area_id;
+	int area_id_fmt;
+};
+
+/* OSPF NBMA neighbor structure. */
+struct ospf_nbr_nbma {
+	/* Neighbor IP address. */
+	struct in_addr addr;
+
+	/* OSPF interface. */
+	struct ospf_interface *oi;
+
+	/* OSPF neighbor structure. */
+	struct ospf_neighbor *nbr;
+
+	/* Neighbor priority. */
+	uint8_t priority;
+
+	/* Poll timer value. */
+	uint32_t v_poll;
+
+	/* Poll timer thread. */
+	struct event *t_poll;
+
+	/* State change. */
+	uint32_t state_change;
+};
+
+/* Macro. */
+#define OSPF_AREA_SAME(X, Y)                                                   \
+	(memcmp((X->area_id), (Y->area_id), IPV4_MAX_BYTELEN) == 0)
+
+#define IS_OSPF_ABR(O)		((O)->flags & OSPF_FLAG_ABR)
+#define IS_OSPF_ASBR(O)		((O)->flags & OSPF_FLAG_ASBR)
+
+#define OSPF_IS_AREA_ID_BACKBONE(I) ((I).s_addr == OSPF_AREA_BACKBONE)
+#define OSPF_IS_AREA_BACKBONE(A) OSPF_IS_AREA_ID_BACKBONE ((A)->area_id)
+
+#ifdef roundup
+#  define ROUNDUP(val, gran)	roundup(val, gran)
+#else  /* roundup */
+#  define ROUNDUP(val, gran)	(((val) - 1 | (gran) - 1) + 1)
+#endif /* roundup */
+
+#define LSA_OPTIONS_GET(area)                                                  \
+	(((area)->external_routing == OSPF_AREA_DEFAULT) ? OSPF_OPTION_E : 0)
+#define LSA_OPTIONS_NSSA_GET(area)                                             \
+	(((area)->external_routing == OSPF_AREA_NSSA) ? OSPF_OPTION_NP : 0)
+
+#define OSPF_TIMER_ON(T, F, V) event_add_timer(master, (F), ospf, (V), &(T))
+#define OSPF_AREA_TIMER_ON(T, F, V)                                            \
+	event_add_timer(master, (F), area, (V), &(T))
+#define OSPF_POLL_TIMER_ON(T, F, V)                                            \
+	event_add_timer(master, (F), nbr_nbma, (V), &(T))
+
+/* Extern variables. */
+extern struct ospf_master *om;
+extern unsigned short ospf_instance;
+extern const int ospf_redistributed_proto_max;
+extern struct zclient *zclient;
+extern struct event_loop *master;
+extern int ospf_zlog;
+extern struct zebra_privs_t ospfd_privs;
+
+/* Prototypes. */
+extern const char *ospf_redist_string(unsigned int route_type);
+extern struct ospf *ospf_lookup_instance(unsigned short instance);
+extern struct ospf *ospf_lookup(unsigned short instance, const char *name);
+extern struct ospf *ospf_get(unsigned short instance, const char *name,
+			     bool *created);
+extern struct ospf *ospf_new_alloc(unsigned short instance, const char *name);
+extern struct ospf *ospf_lookup_by_inst_name(unsigned short instance,
+					     const char *name);
+extern struct ospf *ospf_lookup_by_vrf_id(vrf_id_t vrf_id);
+extern uint32_t ospf_count_area_params(struct ospf *ospf);
+extern void ospf_finish(struct ospf *ospf);
+extern void ospf_process_refresh_data(struct ospf *ospf, bool reset);
+extern void ospf_router_id_update(struct ospf *ospf);
+extern void ospf_process_reset(struct ospf *ospf);
+extern void ospf_neighbor_reset(struct ospf *ospf, struct in_addr nbr_id,
+				const char *nbr_str);
+extern int ospf_network_set(struct ospf *ospf, struct prefix_ipv4 *p,
+			    struct in_addr area_id, int df);
+extern int ospf_network_unset(struct ospf *ospf, struct prefix_ipv4 *p,
+			      struct in_addr aread_id);
+extern int ospf_area_display_format_set(struct ospf *ospf,
+					struct ospf_area *area, int df);
+extern int ospf_area_stub_set(struct ospf *ospf, struct in_addr area_id);
+extern int ospf_area_stub_unset(struct ospf *ospf, struct in_addr area_id);
+extern int ospf_area_no_summary_set(struct ospf *ospf, struct in_addr area_id);
+extern int ospf_area_no_summary_unset(struct ospf *ospf,
+				      struct in_addr area_id);
+extern int ospf_area_nssa_set(struct ospf *ospf, struct in_addr area_id);
+extern int ospf_area_nssa_unset(struct ospf *ospf, struct in_addr area_id);
+extern int ospf_area_nssa_suppress_fa_set(struct ospf *ospf,
+					  struct in_addr area_id);
+extern int ospf_area_nssa_suppress_fa_unset(struct ospf *ospf,
+					    struct in_addr area_id);
+extern int ospf_area_nssa_translator_role_set(struct ospf *ospf,
+					      struct in_addr area_id, int role);
+extern void ospf_area_nssa_default_originate_set(struct ospf *ospf,
+						 struct in_addr area_id,
+						 int metric, int metric_type);
+extern void ospf_area_nssa_default_originate_unset(struct ospf *ospf,
+						   struct in_addr area_id);
+extern int ospf_area_export_list_set(struct ospf *ospf,
+				     struct ospf_area *area_id,
+				     const char *list_name);
+extern int ospf_area_export_list_unset(struct ospf *ospf,
+				       struct ospf_area *area_id);
+extern int ospf_area_import_list_set(struct ospf *ospf,
+				     struct ospf_area *area_id,
+				     const char *name);
+extern int ospf_area_import_list_unset(struct ospf *ospf,
+				       struct ospf_area *area_id);
+extern int ospf_area_shortcut_set(struct ospf *ospf, struct ospf_area *area_id,
+				  int mode);
+extern int ospf_area_shortcut_unset(struct ospf *ospf,
+				    struct ospf_area *area_id);
+extern int ospf_timers_refresh_set(struct ospf *ospf, int interval);
+extern int ospf_timers_refresh_unset(struct ospf *ospf);
+void ospf_area_lsdb_discard_delete(struct ospf_area *area);
+extern int ospf_nbr_nbma_set(struct ospf *ospf, struct in_addr nbr_addr);
+extern int ospf_nbr_nbma_unset(struct ospf *ospf, struct in_addr nbr_addr);
+extern int ospf_nbr_nbma_priority_set(struct ospf *ospf,
+				      struct in_addr nbr_addr,
+				      uint8_t priority);
+extern int ospf_nbr_nbma_priority_unset(struct ospf *ospf,
+					struct in_addr nbr_addr);
+extern int ospf_nbr_nbma_poll_interval_set(struct ospf *ospf,
+					   struct in_addr nbr_addr,
+					   unsigned int interval);
+extern int ospf_nbr_nbma_poll_interval_unset(struct ospf *ospf,
+					     struct in_addr addr);
+extern void ospf_if_update(struct ospf *ospf, struct interface *ifp);
+extern void ospf_ls_upd_queue_empty(struct ospf_interface *oi);
+extern void ospf_terminate(void);
+extern void ospf_nbr_nbma_if_update(struct ospf *ospf,
+				    struct ospf_interface *oi);
+extern struct ospf_nbr_nbma *ospf_nbr_nbma_lookup(struct ospf *ospf,
+						  struct in_addr nbr_addr);
+extern int ospf_oi_count(struct interface *ifp);
+
+extern struct ospf_area *ospf_area_new(struct ospf *ospf,
+				       struct in_addr area_id);
+extern struct ospf_area *ospf_area_get(struct ospf *ospf,
+				       struct in_addr area_id);
+extern void ospf_area_check_free(struct ospf *ospf, struct in_addr area_id);
+extern struct ospf_area *ospf_area_lookup_by_area_id(struct ospf *ospf,
+						     struct in_addr area_id);
+extern void ospf_area_add_if(struct ospf_area *oa, struct ospf_interface *oi);
+extern void ospf_area_del_if(struct ospf_area *oa, struct ospf_interface *oi);
+
+extern void ospf_interface_area_set(struct ospf *ospf, struct interface *ifp);
+extern void ospf_interface_area_unset(struct ospf *ospf, struct interface *ifp);
+
+extern void ospf_route_map_init(void);
+
+extern void ospf_master_init(struct event_loop *master);
+extern void ospf_vrf_init(void);
+extern void ospf_vrf_terminate(void);
+extern void ospf_vrf_link(struct ospf *ospf, struct vrf *vrf);
+extern void ospf_vrf_unlink(struct ospf *ospf, struct vrf *vrf);
+const char *ospf_vrf_id_to_name(vrf_id_t vrf_id);
+int ospf_area_nssa_no_summary_set(struct ospf *ospf, struct in_addr area_id);
+
+const char *ospf_get_name(const struct ospf *ospf);
+extern struct ospf_interface *add_ospf_interface(struct connected *co,
+						 struct ospf_area *area);
+/* Update socket bufsize(s), after config change */
+void ospf_update_bufsize(struct ospf *ospf, uint32_t recvsize,
+			 uint32_t sendsize);
+
+extern int p_spaces_compare_func(const struct p_space *a,
+				 const struct p_space *b);
+extern int q_spaces_compare_func(const struct q_space *a,
+				 const struct q_space *b);
+
+#endif /* _ZEBRA_OSPFD_H */