[mirror_frr.git] / nhrpd / nhrpd.h

/* NHRP daemon internal structures and function prototypes
 * Copyright (c) 2014-2015 Timo Teräs
 *
 * This file is free software: you may copy, redistribute and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef NHRPD_H
#define NHRPD_H

#include "list.h"

#include "zbuf.h"
#include "zclient.h"
#include "debug.h"
#include "memory.h"
#include "resolver.h"

DECLARE_MGROUP(NHRPD)

#define NHRPD_DEFAULT_HOLDTIME	7200

#define NHRP_VTY_PORT		2610
#define NHRP_DEFAULT_CONFIG	"nhrpd.conf"

extern struct thread_master *master;

enum { NHRP_OK = 0,
       NHRP_ERR_FAIL,
       NHRP_ERR_NO_MEMORY,
       NHRP_ERR_UNSUPPORTED_INTERFACE,
       NHRP_ERR_NHRP_NOT_ENABLED,
       NHRP_ERR_ENTRY_EXISTS,
       NHRP_ERR_ENTRY_NOT_FOUND,
       NHRP_ERR_PROTOCOL_ADDRESS_MISMATCH,
       __NHRP_ERR_MAX };
#define NHRP_ERR_MAX		(__NHRP_ERR_MAX - 1)

struct notifier_block;

typedef void (*notifier_fn_t)(struct notifier_block *, unsigned long);

struct notifier_block {
	struct list_head notifier_entry;
	notifier_fn_t action;
};

struct notifier_list {
	struct list_head notifier_head;
};

#define NOTIFIER_LIST_INITIALIZER(l)                                           \
	{                                                                      \
		.notifier_head = LIST_INITIALIZER((l)->notifier_head)          \
	}

static inline void notifier_init(struct notifier_list *l)
{
	list_init(&l->notifier_head);
}

static inline void notifier_add(struct notifier_block *n,
				struct notifier_list *l, notifier_fn_t action)
{
	n->action = action;
	list_add_tail(&n->notifier_entry, &l->notifier_head);
}

static inline void notifier_del(struct notifier_block *n)
{
	list_del(&n->notifier_entry);
}

static inline void notifier_call(struct notifier_list *l, int cmd)
{
	struct notifier_block *n, *nn;
	list_for_each_entry_safe(n, nn, &l->notifier_head, notifier_entry)
		n->action(n, cmd);
}

static inline int notifier_active(struct notifier_list *l)
{
	return !list_empty(&l->notifier_head);
}

void nhrp_zebra_init(void);
void nhrp_zebra_terminate(void);

struct zbuf;
struct nhrp_vc;
struct nhrp_cache;
struct nhrp_nhs;
struct nhrp_interface;

#define MAX_ID_LENGTH			64
#define MAX_CERT_LENGTH			2048

enum nhrp_notify_type {
	NOTIFY_INTERFACE_UP,
	NOTIFY_INTERFACE_DOWN,
	NOTIFY_INTERFACE_CHANGED,
	NOTIFY_INTERFACE_ADDRESS_CHANGED,
	NOTIFY_INTERFACE_NBMA_CHANGED,
	NOTIFY_INTERFACE_MTU_CHANGED,

	NOTIFY_VC_IPSEC_CHANGED,
	NOTIFY_VC_IPSEC_UPDATE_NBMA,

	NOTIFY_PEER_UP,
	NOTIFY_PEER_DOWN,
	NOTIFY_PEER_IFCONFIG_CHANGED,
	NOTIFY_PEER_MTU_CHANGED,
	NOTIFY_PEER_NBMA_CHANGING,

	NOTIFY_CACHE_UP,
	NOTIFY_CACHE_DOWN,
	NOTIFY_CACHE_DELETE,
	NOTIFY_CACHE_USED,
	NOTIFY_CACHE_BINDING_CHANGE,
};

struct nhrp_vc {
	struct notifier_list notifier_list;
	uint8_t ipsec;
	uint8_t updating;
	uint8_t abort_migration;

	struct nhrp_vc_peer {
		union sockunion nbma;
		char id[MAX_ID_LENGTH];
		uint16_t certlen;
		uint8_t cert[MAX_CERT_LENGTH];
	} local, remote;
};

enum nhrp_route_type {
	NHRP_ROUTE_BLACKHOLE,
	NHRP_ROUTE_LOCAL,
	NHRP_ROUTE_NBMA_NEXTHOP,
	NHRP_ROUTE_OFF_NBMA,
};

struct nhrp_peer {
	unsigned int ref;
	unsigned online : 1;
	unsigned requested : 1;
	unsigned fallback_requested : 1;
	unsigned prio : 1;
	struct notifier_list notifier_list;
	struct interface *ifp;
	struct nhrp_vc *vc;
	struct thread *t_fallback;
	struct notifier_block vc_notifier, ifp_notifier;
};

struct nhrp_packet_parser {
	struct interface *ifp;
	struct nhrp_afi_data *if_ad;
	struct nhrp_peer *peer;
	struct zbuf *pkt;
	struct zbuf payload;
	struct zbuf extensions;
	struct nhrp_packet_header *hdr;
	enum nhrp_route_type route_type;
	struct prefix route_prefix;
	union sockunion src_nbma, src_proto, dst_proto;
};

struct nhrp_reqid_pool {
	struct hash *reqid_hash;
	uint32_t next_request_id;
};

struct nhrp_reqid {
	uint32_t request_id;
	void (*cb)(struct nhrp_reqid *, void *);
};

extern struct nhrp_reqid_pool nhrp_packet_reqid;
extern struct nhrp_reqid_pool nhrp_event_reqid;

enum nhrp_cache_type {
	NHRP_CACHE_INVALID = 0,
	NHRP_CACHE_INCOMPLETE,
	NHRP_CACHE_NEGATIVE,
	NHRP_CACHE_CACHED,
	NHRP_CACHE_DYNAMIC,
	NHRP_CACHE_NHS,
	NHRP_CACHE_STATIC,
	NHRP_CACHE_LOCAL,
	NHRP_CACHE_NUM_TYPES
};

extern const char *const nhrp_cache_type_str[];
extern unsigned long nhrp_cache_counts[NHRP_CACHE_NUM_TYPES];

struct nhrp_cache {
	struct interface *ifp;
	union sockunion remote_addr;

	unsigned map : 1;
	unsigned used : 1;
	unsigned route_installed : 1;
	unsigned nhrp_route_installed : 1;

	struct notifier_block peer_notifier;
	struct notifier_block newpeer_notifier;
	struct notifier_list notifier_list;
	struct nhrp_reqid eventid;
	struct thread *t_timeout;
	struct thread *t_auth;

	struct {
		enum nhrp_cache_type type;
		union sockunion remote_nbma_natoa;
		struct nhrp_peer *peer;
		time_t expires;
		uint32_t mtu;
	} cur, new;
};

struct nhrp_shortcut {
	struct prefix *p;
	union sockunion addr;

	struct nhrp_reqid reqid;
	struct thread *t_timer;

	enum nhrp_cache_type type;
	unsigned int holding_time;
	unsigned route_installed : 1;
	unsigned expiring : 1;

	struct nhrp_cache *cache;
	struct notifier_block cache_notifier;
};

struct nhrp_nhs {
	struct interface *ifp;
	struct list_head nhslist_entry;

	unsigned hub : 1;
	afi_t afi;
	union sockunion proto_addr;
	const char *nbma_fqdn; /* IP-address or FQDN */

	struct thread *t_resolve;
	struct resolver_query dns_resolve;
	struct list_head reglist_head;
};

struct nhrp_registration {
	struct list_head reglist_entry;
	struct thread *t_register;
	struct nhrp_nhs *nhs;
	struct nhrp_reqid reqid;
	unsigned int timeout;
	unsigned mark : 1;
	union sockunion proto_addr;
	struct nhrp_peer *peer;
	struct notifier_block peer_notifier;
};

#define NHRP_IFF_SHORTCUT		0x0001
#define NHRP_IFF_REDIRECT		0x0002
#define NHRP_IFF_REG_NO_UNIQUE		0x0100

struct nhrp_interface {
	struct interface *ifp;

	unsigned enabled : 1;

	char *ipsec_profile, *ipsec_fallback_profile, *source;
	union sockunion nbma;
	union sockunion nat_nbma;
	unsigned int linkidx;
	uint32_t grekey;

	struct hash *peer_hash;
	struct hash *cache_hash;

	struct notifier_list notifier_list;

	struct interface *nbmaifp;
	struct notifier_block nbmanifp_notifier;

	struct nhrp_afi_data {
		unsigned flags;
		unsigned short configured : 1;
		union sockunion addr;
		uint32_t network_id;
		short configured_mtu;
		unsigned short mtu;
		unsigned int holdtime;
		struct list_head nhslist_head;
	} afi[AFI_MAX];
};

extern struct zebra_privs_t nhrpd_privs;

int sock_open_unix(const char *path);

void nhrp_interface_init(void);
void nhrp_interface_update(struct interface *ifp);
void nhrp_interface_update_mtu(struct interface *ifp, afi_t afi);

int nhrp_interface_add(ZAPI_CALLBACK_ARGS);
int nhrp_interface_delete(ZAPI_CALLBACK_ARGS);
int nhrp_interface_up(ZAPI_CALLBACK_ARGS);
int nhrp_interface_down(ZAPI_CALLBACK_ARGS);
int nhrp_interface_address_add(ZAPI_CALLBACK_ARGS);
int nhrp_interface_address_delete(ZAPI_CALLBACK_ARGS);

void nhrp_interface_notify_add(struct interface *ifp, struct notifier_block *n,
			       notifier_fn_t fn);
void nhrp_interface_notify_del(struct interface *ifp, struct notifier_block *n);
void nhrp_interface_set_protection(struct interface *ifp, const char *profile,
				   const char *fallback_profile);
void nhrp_interface_set_source(struct interface *ifp, const char *ifname);

int nhrp_nhs_add(struct interface *ifp, afi_t afi, union sockunion *proto_addr,
		 const char *nbma_fqdn);
int nhrp_nhs_del(struct interface *ifp, afi_t afi, union sockunion *proto_addr,
		 const char *nbma_fqdn);
int nhrp_nhs_free(struct nhrp_nhs *nhs);
void nhrp_nhs_terminate(void);
void nhrp_nhs_foreach(struct interface *ifp, afi_t afi,
		      void (*cb)(struct nhrp_nhs *, struct nhrp_registration *,
				 void *),
		      void *ctx);

void nhrp_route_update_nhrp(const struct prefix *p, struct interface *ifp);
void nhrp_route_announce(int add, enum nhrp_cache_type type,
			 const struct prefix *p, struct interface *ifp,
			 const union sockunion *nexthop, uint32_t mtu);
int nhrp_route_read(ZAPI_CALLBACK_ARGS);
int nhrp_route_get_nexthop(const union sockunion *addr, struct prefix *p,
			   union sockunion *via, struct interface **ifp);
enum nhrp_route_type nhrp_route_address(struct interface *in_ifp,
					union sockunion *addr, struct prefix *p,
					struct nhrp_peer **peer);

void nhrp_config_init(void);

void nhrp_shortcut_init(void);
void nhrp_shortcut_terminate(void);
void nhrp_shortcut_initiate(union sockunion *addr);
void nhrp_shortcut_foreach(afi_t afi,
			   void (*cb)(struct nhrp_shortcut *, void *),
			   void *ctx);
void nhrp_shortcut_purge(struct nhrp_shortcut *s, int force);
void nhrp_shortcut_prefix_change(const struct prefix *p, int deleted);

struct nhrp_cache *nhrp_cache_get(struct interface *ifp,
				  union sockunion *remote_addr, int create);
void nhrp_cache_foreach(struct interface *ifp,
			void (*cb)(struct nhrp_cache *, void *), void *ctx);
void nhrp_cache_set_used(struct nhrp_cache *, int);
int nhrp_cache_update_binding(struct nhrp_cache *, enum nhrp_cache_type type,
			      int holding_time, struct nhrp_peer *p,
			      uint32_t mtu, union sockunion *nbma_natoa);
void nhrp_cache_notify_add(struct nhrp_cache *c, struct notifier_block *,
			   notifier_fn_t);
void nhrp_cache_notify_del(struct nhrp_cache *c, struct notifier_block *);

void nhrp_vc_init(void);
void nhrp_vc_terminate(void);
struct nhrp_vc *nhrp_vc_get(const union sockunion *src,
			    const union sockunion *dst, int create);
int nhrp_vc_ipsec_updown(uint32_t child_id, struct nhrp_vc *vc);
void nhrp_vc_notify_add(struct nhrp_vc *, struct notifier_block *,
			notifier_fn_t);
void nhrp_vc_notify_del(struct nhrp_vc *, struct notifier_block *);
void nhrp_vc_foreach(void (*cb)(struct nhrp_vc *, void *), void *ctx);
void nhrp_vc_reset(void);

void vici_init(void);
void vici_terminate(void);
void vici_request_vc(const char *profile, union sockunion *src,
		     union sockunion *dst, int prio);

extern const char *nhrp_event_socket_path;

void evmgr_init(void);
void evmgr_terminate(void);
void evmgr_set_socket(const char *socket);
void evmgr_notify(const char *name, struct nhrp_cache *c,
		  void (*cb)(struct nhrp_reqid *, void *));

struct nhrp_packet_header *nhrp_packet_push(struct zbuf *zb, uint8_t type,
					    const union sockunion *src_nbma,
					    const union sockunion *src_proto,
					    const union sockunion *dst_proto);
void nhrp_packet_complete(struct zbuf *zb, struct nhrp_packet_header *hdr);
uint16_t nhrp_packet_calculate_checksum(const uint8_t *pdu, uint16_t len);

struct nhrp_packet_header *nhrp_packet_pull(struct zbuf *zb,
					    union sockunion *src_nbma,
					    union sockunion *src_proto,
					    union sockunion *dst_proto);

struct nhrp_cie_header *nhrp_cie_push(struct zbuf *zb, uint8_t code,
				      const union sockunion *nbma,
				      const union sockunion *proto);
struct nhrp_cie_header *nhrp_cie_pull(struct zbuf *zb,
				      struct nhrp_packet_header *hdr,
				      union sockunion *nbma,
				      union sockunion *proto);

struct nhrp_extension_header *
nhrp_ext_push(struct zbuf *zb, struct nhrp_packet_header *hdr, uint16_t type);
void nhrp_ext_complete(struct zbuf *zb, struct nhrp_extension_header *ext);
struct nhrp_extension_header *nhrp_ext_pull(struct zbuf *zb,
					    struct zbuf *payload);
void nhrp_ext_request(struct zbuf *zb, struct nhrp_packet_header *hdr,
		      struct interface *);
int nhrp_ext_reply(struct zbuf *zb, struct nhrp_packet_header *hdr,
		   struct interface *ifp, struct nhrp_extension_header *ext,
		   struct zbuf *extpayload);

uint32_t nhrp_reqid_alloc(struct nhrp_reqid_pool *, struct nhrp_reqid *r,
			  void (*cb)(struct nhrp_reqid *, void *));
void nhrp_reqid_free(struct nhrp_reqid_pool *, struct nhrp_reqid *r);
struct nhrp_reqid *nhrp_reqid_lookup(struct nhrp_reqid_pool *, uint32_t reqid);

int nhrp_packet_init(void);

struct nhrp_peer *nhrp_peer_get(struct interface *ifp,
				const union sockunion *remote_nbma);
struct nhrp_peer *nhrp_peer_ref(struct nhrp_peer *p);
void nhrp_peer_unref(struct nhrp_peer *p);
int nhrp_peer_check(struct nhrp_peer *p, int establish);
void nhrp_peer_notify_add(struct nhrp_peer *p, struct notifier_block *,
			  notifier_fn_t);
void nhrp_peer_notify_del(struct nhrp_peer *p, struct notifier_block *);
void nhrp_peer_recv(struct nhrp_peer *p, struct zbuf *zb);
void nhrp_peer_send(struct nhrp_peer *p, struct zbuf *zb);
void nhrp_peer_send_indication(struct interface *ifp, uint16_t, struct zbuf *);

#endif
Commit	Line	Data
2fb975da TT	1	/* NHRP daemon internal structures and function prototypes
	2	* Copyright (c) 2014-2015 Timo Teräs
	3	*
	4	* This file is free software: you may copy, redistribute and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation, either version 2 of the License, or
	7	* (at your option) any later version.
	8	*/
	9
	10	#ifndef NHRPD_H
	11	#define NHRPD_H
	12
	13	#include "list.h"
	14
	15	#include "zbuf.h"
	16	#include "zclient.h"
	17	#include "debug.h"
819dc8bb	18	#include "memory.h"
fe9e7b71	19	#include "resolver.h"
819dc8bb DL	20
819dc8bb DL	21	DECLARE_MGROUP(NHRPD)
2fb975da TT	22
	23	#define NHRPD_DEFAULT_HOLDTIME 7200
	24
442deed8	25	#define NHRP_VTY_PORT 2610
2fb975da TT	26	#define NHRP_DEFAULT_CONFIG "nhrpd.conf"
	27
	28	extern struct thread_master *master;
	29
996c9314 LB	30	enum { NHRP_OK = 0,
	31	NHRP_ERR_FAIL,
	32	NHRP_ERR_NO_MEMORY,
	33	NHRP_ERR_UNSUPPORTED_INTERFACE,
	34	NHRP_ERR_NHRP_NOT_ENABLED,
	35	NHRP_ERR_ENTRY_EXISTS,
	36	NHRP_ERR_ENTRY_NOT_FOUND,
	37	NHRP_ERR_PROTOCOL_ADDRESS_MISMATCH,
	38	__NHRP_ERR_MAX };
6c8ca260	39	#define NHRP_ERR_MAX (__NHRP_ERR_MAX - 1)
2fb975da TT	40
	41	struct notifier_block;
	42
	43	typedef void (notifier_fn_t)(struct notifier_block , unsigned long);
	44
	45	struct notifier_block {
	46	struct list_head notifier_entry;
	47	notifier_fn_t action;
	48	};
	49
	50	struct notifier_list {
	51	struct list_head notifier_head;
	52	};
	53
996c9314 LB	54	#define NOTIFIER_LIST_INITIALIZER(l) \
	55	{ \
	56	.notifier_head = LIST_INITIALIZER((l)->notifier_head) \
	57	}
2fb975da TT	58
	59	static inline void notifier_init(struct notifier_list *l)
	60	{
	61	list_init(&l->notifier_head);
	62	}
	63
996c9314 LB	64	static inline void notifier_add(struct notifier_block *n,
996c9314 LB	65	struct notifier_list *l, notifier_fn_t action)
2fb975da TT	66	{
	67	n->action = action;
	68	list_add_tail(&n->notifier_entry, &l->notifier_head);
	69	}
	70
	71	static inline void notifier_del(struct notifier_block *n)
	72	{
	73	list_del(&n->notifier_entry);
	74	}
	75
	76	static inline void notifier_call(struct notifier_list *l, int cmd)
	77	{
	78	struct notifier_block n, nn;
	79	list_for_each_entry_safe(n, nn, &l->notifier_head, notifier_entry)
	80	n->action(n, cmd);
	81	}
	82
	83	static inline int notifier_active(struct notifier_list *l)
	84	{
	85	return !list_empty(&l->notifier_head);
	86	}
	87
2fb975da TT	88	void nhrp_zebra_init(void);
	89	void nhrp_zebra_terminate(void);
	90
	91	struct zbuf;
	92	struct nhrp_vc;
	93	struct nhrp_cache;
	94	struct nhrp_nhs;
	95	struct nhrp_interface;
	96
	97	#define MAX_ID_LENGTH 64
	98	#define MAX_CERT_LENGTH 2048
	99
	100	enum nhrp_notify_type {
	101	NOTIFY_INTERFACE_UP,
	102	NOTIFY_INTERFACE_DOWN,
	103	NOTIFY_INTERFACE_CHANGED,
	104	NOTIFY_INTERFACE_ADDRESS_CHANGED,
	105	NOTIFY_INTERFACE_NBMA_CHANGED,
	106	NOTIFY_INTERFACE_MTU_CHANGED,
	107
	108	NOTIFY_VC_IPSEC_CHANGED,
	109	NOTIFY_VC_IPSEC_UPDATE_NBMA,
	110
	111	NOTIFY_PEER_UP,
	112	NOTIFY_PEER_DOWN,
	113	NOTIFY_PEER_IFCONFIG_CHANGED,
	114	NOTIFY_PEER_MTU_CHANGED,
	115	NOTIFY_PEER_NBMA_CHANGING,
	116
	117	NOTIFY_CACHE_UP,
	118	NOTIFY_CACHE_DOWN,
	119	NOTIFY_CACHE_DELETE,
	120	NOTIFY_CACHE_USED,
	121	NOTIFY_CACHE_BINDING_CHANGE,
	122	};
	123
	124	struct nhrp_vc {
	125	struct notifier_list notifier_list;
	126	uint8_t ipsec;
	127	uint8_t updating;
	128	uint8_t abort_migration;
	129
	130	struct nhrp_vc_peer {
	131	union sockunion nbma;
	132	char id[MAX_ID_LENGTH];
	133	uint16_t certlen;
	134	uint8_t cert[MAX_CERT_LENGTH];
	135	} local, remote;
	136	};
	137
	138	enum nhrp_route_type {
	139	NHRP_ROUTE_BLACKHOLE,
	140	NHRP_ROUTE_LOCAL,
	141	NHRP_ROUTE_NBMA_NEXTHOP,
	142	NHRP_ROUTE_OFF_NBMA,
	143	};
	144
	145	struct nhrp_peer {
	146	unsigned int ref;
	147	unsigned online : 1;
	148	unsigned requested : 1;
	149	unsigned fallback_requested : 1;
	150	unsigned prio : 1;
	151	struct notifier_list notifier_list;
152	struct interface *ifp;
153	struct nhrp_vc *vc;
154	struct thread *t_fallback;
155	struct notifier_block vc_notifier, ifp_notifier;
156	};
157
158	struct nhrp_packet_parser {
159	struct interface *ifp;
160	struct nhrp_afi_data *if_ad;
161	struct nhrp_peer *peer;
162	struct zbuf *pkt;
163	struct zbuf payload;
164	struct zbuf extensions;
165	struct nhrp_packet_header *hdr;
166	enum nhrp_route_type route_type;
167	struct prefix route_prefix;
168	union sockunion src_nbma, src_proto, dst_proto;
169	};
170
171	struct nhrp_reqid_pool {
172	struct hash *reqid_hash;
173	uint32_t next_request_id;
174	};
175
176	struct nhrp_reqid {
177	uint32_t request_id;
178	void (cb)(struct nhrp_reqid , void *);
179	};
180
181	extern struct nhrp_reqid_pool nhrp_packet_reqid;
182	extern struct nhrp_reqid_pool nhrp_event_reqid;
183
184	enum nhrp_cache_type {
185	NHRP_CACHE_INVALID = 0,
186	NHRP_CACHE_INCOMPLETE,
187	NHRP_CACHE_NEGATIVE,
188	NHRP_CACHE_CACHED,
189	NHRP_CACHE_DYNAMIC,
190	NHRP_CACHE_NHS,
191	NHRP_CACHE_STATIC,
192	NHRP_CACHE_LOCAL,
193	NHRP_CACHE_NUM_TYPES
194	};
195
996c9314	196	extern const char *const nhrp_cache_type_str[];
2fb975da TT	197	extern unsigned long nhrp_cache_counts[NHRP_CACHE_NUM_TYPES];
	198
	199	struct nhrp_cache {
	200	struct interface *ifp;
	201	union sockunion remote_addr;
	202
	203	unsigned map : 1;
	204	unsigned used : 1;
	205	unsigned route_installed : 1;
	206	unsigned nhrp_route_installed : 1;
	207
	208	struct notifier_block peer_notifier;
	209	struct notifier_block newpeer_notifier;
	210	struct notifier_list notifier_list;
	211	struct nhrp_reqid eventid;
	212	struct thread *t_timeout;
	213	struct thread *t_auth;
	214
	215	struct {
	216	enum nhrp_cache_type type;
	217	union sockunion remote_nbma_natoa;
	218	struct nhrp_peer *peer;
	219	time_t expires;
	220	uint32_t mtu;
	221	} cur, new;
	222	};
	223
	224	struct nhrp_shortcut {
	225	struct prefix *p;
	226	union sockunion addr;
	227
	228	struct nhrp_reqid reqid;
	229	struct thread *t_timer;
	230
	231	enum nhrp_cache_type type;
	232	unsigned int holding_time;
	233	unsigned route_installed : 1;
	234	unsigned expiring : 1;
	235
	236	struct nhrp_cache *cache;
	237	struct notifier_block cache_notifier;
	238	};
	239
	240	struct nhrp_nhs {
	241	struct interface *ifp;
	242	struct list_head nhslist_entry;
	243
	244	unsigned hub : 1;
	245	afi_t afi;
	246	union sockunion proto_addr;
996c9314	247	const char nbma_fqdn; / IP-address or FQDN */
2fb975da TT	248
	249	struct thread *t_resolve;
	250	struct resolver_query dns_resolve;
	251	struct list_head reglist_head;
	252	};
	253
0ca036b4 TT	254	struct nhrp_registration {
	255	struct list_head reglist_entry;
	256	struct thread *t_register;
	257	struct nhrp_nhs *nhs;
	258	struct nhrp_reqid reqid;
	259	unsigned int timeout;
	260	unsigned mark : 1;
	261	union sockunion proto_addr;
	262	struct nhrp_peer *peer;
	263	struct notifier_block peer_notifier;
	264	};
	265
2fb975da TT	266	#define NHRP_IFF_SHORTCUT 0x0001
	267	#define NHRP_IFF_REDIRECT 0x0002
	268	#define NHRP_IFF_REG_NO_UNIQUE 0x0100
	269
	270	struct nhrp_interface {
	271	struct interface *ifp;
	272
	273	unsigned enabled : 1;
	274
	275	char ipsec_profile, ipsec_fallback_profile, *source;
	276	union sockunion nbma;
	277	union sockunion nat_nbma;
	278	unsigned int linkidx;
	279	uint32_t grekey;
	280
	281	struct hash *peer_hash;
	282	struct hash *cache_hash;
	283
	284	struct notifier_list notifier_list;
	285
	286	struct interface *nbmaifp;
	287	struct notifier_block nbmanifp_notifier;
	288
	289	struct nhrp_afi_data {
	290	unsigned flags;
	291	unsigned short configured : 1;
	292	union sockunion addr;
	293	uint32_t network_id;
	294	short configured_mtu;
	295	unsigned short mtu;
	296	unsigned int holdtime;
	297	struct list_head nhslist_head;
	298	} afi[AFI_MAX];
	299	};
	300
26efbc7b DS	301	extern struct zebra_privs_t nhrpd_privs;
26efbc7b DS	302
2fb975da TT	303	int sock_open_unix(const char *path);
	304
	305	void nhrp_interface_init(void);
	306	void nhrp_interface_update(struct interface *ifp);
	307	void nhrp_interface_update_mtu(struct interface *ifp, afi_t afi);
	308
121f9dee QY	309	int nhrp_interface_add(ZAPI_CALLBACK_ARGS);
	310	int nhrp_interface_delete(ZAPI_CALLBACK_ARGS);
	311	int nhrp_interface_up(ZAPI_CALLBACK_ARGS);
	312	int nhrp_interface_down(ZAPI_CALLBACK_ARGS);
	313	int nhrp_interface_address_add(ZAPI_CALLBACK_ARGS);
	314	int nhrp_interface_address_delete(ZAPI_CALLBACK_ARGS);
996c9314 LB	315
	316	void nhrp_interface_notify_add(struct interface ifp, struct notifier_block n,
	317	notifier_fn_t fn);
2fb975da	318	void nhrp_interface_notify_del(struct interface ifp, struct notifier_block n);
996c9314 LB	319	void nhrp_interface_set_protection(struct interface ifp, const char profile,
996c9314 LB	320	const char *fallback_profile);
2fb975da TT	321	void nhrp_interface_set_source(struct interface ifp, const char ifname);
2fb975da TT	322
996c9314 LB	323	int nhrp_nhs_add(struct interface ifp, afi_t afi, union sockunion proto_addr,
	324	const char *nbma_fqdn);
	325	int nhrp_nhs_del(struct interface ifp, afi_t afi, union sockunion proto_addr,
	326	const char *nbma_fqdn);
2fb975da TT	327	int nhrp_nhs_free(struct nhrp_nhs *nhs);
2fb975da TT	328	void nhrp_nhs_terminate(void);
996c9314 LB	329	void nhrp_nhs_foreach(struct interface *ifp, afi_t afi,
	330	void (cb)(struct nhrp_nhs , struct nhrp_registration *,
	331	void *),
	332	void *ctx);
2fb975da TT	333
2fb975da TT	334	void nhrp_route_update_nhrp(const struct prefix p, struct interface ifp);
996c9314 LB	335	void nhrp_route_announce(int add, enum nhrp_cache_type type,
	336	const struct prefix p, struct interface ifp,
	337	const union sockunion *nexthop, uint32_t mtu);
121f9dee	338	int nhrp_route_read(ZAPI_CALLBACK_ARGS);
996c9314 LB	339	int nhrp_route_get_nexthop(const union sockunion addr, struct prefix p,
	340	union sockunion via, struct interface *ifp);
	341	enum nhrp_route_type nhrp_route_address(struct interface *in_ifp,
	342	union sockunion addr, struct prefix p,
	343	struct nhrp_peer **peer);
2fb975da TT	344
	345	void nhrp_config_init(void);
	346
	347	void nhrp_shortcut_init(void);
	348	void nhrp_shortcut_terminate(void);
	349	void nhrp_shortcut_initiate(union sockunion *addr);
996c9314 LB	350	void nhrp_shortcut_foreach(afi_t afi,
	351	void (cb)(struct nhrp_shortcut , void *),
	352	void *ctx);
2fb975da TT	353	void nhrp_shortcut_purge(struct nhrp_shortcut *s, int force);
	354	void nhrp_shortcut_prefix_change(const struct prefix *p, int deleted);
	355
996c9314 LB	356	struct nhrp_cache nhrp_cache_get(struct interface ifp,
	357	union sockunion *remote_addr, int create);
	358	void nhrp_cache_foreach(struct interface *ifp,
	359	void (cb)(struct nhrp_cache , void ), void ctx);
2fb975da	360	void nhrp_cache_set_used(struct nhrp_cache *, int);
996c9314 LB	361	int nhrp_cache_update_binding(struct nhrp_cache *, enum nhrp_cache_type type,
	362	int holding_time, struct nhrp_peer *p,
	363	uint32_t mtu, union sockunion *nbma_natoa);
	364	void nhrp_cache_notify_add(struct nhrp_cache c, struct notifier_block ,
	365	notifier_fn_t);
2fb975da TT	366	void nhrp_cache_notify_del(struct nhrp_cache c, struct notifier_block );
	367
	368	void nhrp_vc_init(void);
	369	void nhrp_vc_terminate(void);
996c9314 LB	370	struct nhrp_vc nhrp_vc_get(const union sockunion src,
996c9314 LB	371	const union sockunion *dst, int create);
2fb975da	372	int nhrp_vc_ipsec_updown(uint32_t child_id, struct nhrp_vc *vc);
996c9314 LB	373	void nhrp_vc_notify_add(struct nhrp_vc , struct notifier_block ,
996c9314 LB	374	notifier_fn_t);
2fb975da TT	375	void nhrp_vc_notify_del(struct nhrp_vc , struct notifier_block );
	376	void nhrp_vc_foreach(void (cb)(struct nhrp_vc , void ), void ctx);
	377	void nhrp_vc_reset(void);
	378
	379	void vici_init(void);
	380	void vici_terminate(void);
996c9314 LB	381	void vici_request_vc(const char profile, union sockunion src,
996c9314 LB	382	union sockunion *dst, int prio);
2fb975da TT	383
	384	extern const char *nhrp_event_socket_path;
	385
	386	void evmgr_init(void);
	387	void evmgr_terminate(void);
	388	void evmgr_set_socket(const char *socket);
996c9314 LB	389	void evmgr_notify(const char name, struct nhrp_cache c,
996c9314 LB	390	void (cb)(struct nhrp_reqid , void *));
2fb975da	391
996c9314 LB	392	struct nhrp_packet_header nhrp_packet_push(struct zbuf zb, uint8_t type,
	393	const union sockunion *src_nbma,
	394	const union sockunion *src_proto,
	395	const union sockunion *dst_proto);
2fb975da TT	396	void nhrp_packet_complete(struct zbuf zb, struct nhrp_packet_header hdr);
	397	uint16_t nhrp_packet_calculate_checksum(const uint8_t *pdu, uint16_t len);
	398
996c9314 LB	399	struct nhrp_packet_header nhrp_packet_pull(struct zbuf zb,
	400	union sockunion *src_nbma,
	401	union sockunion *src_proto,
	402	union sockunion *dst_proto);
	403
	404	struct nhrp_cie_header nhrp_cie_push(struct zbuf zb, uint8_t code,
	405	const union sockunion *nbma,
	406	const union sockunion *proto);
	407	struct nhrp_cie_header nhrp_cie_pull(struct zbuf zb,
	408	struct nhrp_packet_header *hdr,
	409	union sockunion *nbma,
	410	union sockunion *proto);
	411
	412	struct nhrp_extension_header *
	413	nhrp_ext_push(struct zbuf zb, struct nhrp_packet_header hdr, uint16_t type);
2fb975da	414	void nhrp_ext_complete(struct zbuf zb, struct nhrp_extension_header ext);
996c9314 LB	415	struct nhrp_extension_header nhrp_ext_pull(struct zbuf zb,
	416	struct zbuf *payload);
	417	void nhrp_ext_request(struct zbuf zb, struct nhrp_packet_header hdr,
	418	struct interface *);
	419	int nhrp_ext_reply(struct zbuf zb, struct nhrp_packet_header hdr,
	420	struct interface ifp, struct nhrp_extension_header ext,
	421	struct zbuf *extpayload);
	422
	423	uint32_t nhrp_reqid_alloc(struct nhrp_reqid_pool , struct nhrp_reqid r,
	424	void (cb)(struct nhrp_reqid , void *));
2fb975da TT	425	void nhrp_reqid_free(struct nhrp_reqid_pool , struct nhrp_reqid r);
	426	struct nhrp_reqid nhrp_reqid_lookup(struct nhrp_reqid_pool , uint32_t reqid);
	427
	428	int nhrp_packet_init(void);
	429
996c9314 LB	430	struct nhrp_peer nhrp_peer_get(struct interface ifp,
996c9314 LB	431	const union sockunion *remote_nbma);
2fb975da TT	432	struct nhrp_peer nhrp_peer_ref(struct nhrp_peer p);
	433	void nhrp_peer_unref(struct nhrp_peer *p);
	434	int nhrp_peer_check(struct nhrp_peer *p, int establish);
996c9314 LB	435	void nhrp_peer_notify_add(struct nhrp_peer p, struct notifier_block ,
996c9314 LB	436	notifier_fn_t);
2fb975da TT	437	void nhrp_peer_notify_del(struct nhrp_peer p, struct notifier_block );
	438	void nhrp_peer_recv(struct nhrp_peer p, struct zbuf zb);
	439	void nhrp_peer_send(struct nhrp_peer p, struct zbuf zb);
	440	void nhrp_peer_send_indication(struct interface ifp, uint16_t, struct zbuf );
	441
	442	#endif