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/* nhrp_peer.h - NHRP peer cache definitions
*
* Copyright (c) 2007-2012 Timo Teräs <timo.teras@iki.fi>
*
* This software is licensed under the MIT License.
* See MIT-LICENSE.txt for additional details.
*/
#ifndef NHRP_PEER_H
#define NHRP_PEER_H
#include <time.h>
#include <stdint.h>
#include <sys/types.h>
#include "nhrp_address.h"
#include "libev.h"
#include "list.h"
#define NHRP_PEER_TYPE_INCOMPLETE 0x00 /* Resolution request sent */
#define NHRP_PEER_TYPE_NEGATIVE 0x01 /* Negative cached */
#define NHRP_PEER_TYPE_CACHED 0x02 /* Received/relayed resolution reply */
#define NHRP_PEER_TYPE_SHORTCUT_ROUTE 0x03 /* Received/relayed resolution for route */
#define NHRP_PEER_TYPE_DYNAMIC 0x04 /* NHC registration */
#define NHRP_PEER_TYPE_DYNAMIC_NHS 0x05 /* Dynamic NHS from dns-map */
#define NHRP_PEER_TYPE_STATIC 0x06 /* Static mapping from config file */
#define NHRP_PEER_TYPE_STATIC_DNS 0x07 /* Static dns-map from config file */
#define NHRP_PEER_TYPE_LOCAL_ROUTE 0x08 /* Non-local destination, with local route */
#define NHRP_PEER_TYPE_LOCAL_ADDR 0x09 /* Local destination (IP or off-NBMA subnet) */
#define NHRP_PEER_TYPE_MAX (NHRP_PEER_TYPE_LOCAL_ADDR+1)
#define NHRP_PEER_TYPEMASK_ADJACENT \
(BIT(NHRP_PEER_TYPE_CACHED) | \
BIT(NHRP_PEER_TYPE_DYNAMIC) | \
BIT(NHRP_PEER_TYPE_DYNAMIC_NHS) | \
BIT(NHRP_PEER_TYPE_STATIC) | \
BIT(NHRP_PEER_TYPE_LOCAL_ADDR))
#define NHRP_PEER_TYPEMASK_REMOVABLE \
(BIT(NHRP_PEER_TYPE_INCOMPLETE) | \
BIT(NHRP_PEER_TYPE_NEGATIVE) | \
BIT(NHRP_PEER_TYPE_CACHED) | \
BIT(NHRP_PEER_TYPE_SHORTCUT_ROUTE) | \
BIT(NHRP_PEER_TYPE_DYNAMIC))
#define NHRP_PEER_TYPEMASK_PURGEABLE \
(NHRP_PEER_TYPEMASK_REMOVABLE | \
BIT(NHRP_PEER_TYPE_DYNAMIC_NHS) | \
BIT(NHRP_PEER_TYPE_STATIC) | \
BIT(NHRP_PEER_TYPE_STATIC_DNS))
#define NHRP_PEER_TYPEMASK_ALL \
(NHRP_PEER_TYPEMASK_PURGEABLE | \
BIT(NHRP_PEER_TYPE_LOCAL_ROUTE) | \
BIT(NHRP_PEER_TYPE_LOCAL_ADDR))
/* For routing via NHS */
#define NHRP_PEER_TYPEMASK_ROUTE_VIA_NHS \
(BIT(NHRP_PEER_TYPE_DYNAMIC) | \
BIT(NHRP_PEER_TYPE_DYNAMIC_NHS) | \
BIT(NHRP_PEER_TYPE_STATIC) | \
BIT(NHRP_PEER_TYPE_LOCAL_ROUTE) | \
BIT(NHRP_PEER_TYPE_LOCAL_ADDR))
#define NHRP_PEER_FLAG_UNIQUE 0x01 /* Peer is unique; see RFC2332 */
#define NHRP_PEER_FLAG_REGISTER 0x02 /* For TYPE_STATIC: send registration */
#define NHRP_PEER_FLAG_CISCO 0x04 /* For TYPE_STATIC: peer is Cisco */
#define NHRP_PEER_FLAG_USED 0x10 /* Peer is in kernel ARP table */
#define NHRP_PEER_FLAG_LOWER_UP 0x20 /* Script executed succesfully */
#define NHRP_PEER_FLAG_UP 0x40 /* Can send all packets (registration ok) */
#define NHRP_PEER_FLAG_REPLACED 0x80 /* Peer has been replaced */
#define NHRP_PEER_FLAG_REMOVED 0x100 /* Deleted, but not removed from cache yet */
#define NHRP_PEER_FLAG_MARK 0x200 /* Can be used to temporarily mark peers */
#define NHRP_PEER_FIND_ROUTE 0x01
#define NHRP_PEER_FIND_EXACT 0x02
#define NHRP_PEER_FIND_SUBNET 0x04
#define NHRP_PEER_FIND_UP 0x10
#define NHRP_PEER_FIND_MARK 0x20
struct nhrp_interface;
struct nhrp_packet;
struct nhrp_pending_request;
union __attribute__ ((__transparent_union__)) nhrp_peer_event {
struct ev_timer *timer;
struct ev_child *child;
};
struct nhrp_peer {
unsigned int ref;
unsigned int flags;
struct list_head peer_list_entry;
struct list_head mcast_list_entry;
struct hlist_node nbma_hash_entry;
const char *purge_reason;
struct nhrp_interface *interface;
struct nhrp_peer *parent;
struct nhrp_packet *queued_packet;
struct nhrp_pending_request *request;
struct ev_timer timer;
struct ev_child child;
struct nhrp_address_query address_query;
uint8_t type;
uint8_t prefix_length;
uint16_t afnum;
uint16_t protocol_type;
uint16_t mtu, my_nbma_mtu;
ev_tstamp expire_time;
ev_tstamp last_used;
struct nhrp_address my_nbma_address;
struct nhrp_address protocol_address;
unsigned int holding_time;
char *nbma_hostname;
/* NHRP_PEER_TYPE_ROUTE: protocol addr., others: NBMA addr. */
struct nhrp_address next_hop_address;
struct nhrp_address next_hop_nat_oa;
};
struct nhrp_peer_selector {
int flags; /* NHRP_PEER_FIND_xxx */
int type_mask;
struct nhrp_interface *interface;
struct nhrp_peer *parent;
const char *hostname;
int prefix_length;
struct nhrp_address protocol_address;
struct nhrp_address next_hop_address;
struct nhrp_address local_nbma_address;
};
const char * const nhrp_peer_type[NHRP_PEER_TYPE_MAX];
typedef int (*nhrp_peer_enumerator)(void *ctx, struct nhrp_peer *peer);
void nhrp_peer_cleanup(void);
struct nhrp_peer *nhrp_peer_alloc(struct nhrp_interface *iface);
struct nhrp_peer *nhrp_peer_get(struct nhrp_peer *peer);
int nhrp_peer_put(struct nhrp_peer *peer);
void nhrp_peer_cancel_async(struct nhrp_peer *peer);
void nhrp_peer_insert(struct nhrp_peer *peer);
void nhrp_peer_remove(struct nhrp_peer *peer);
void nhrp_peer_purge(struct nhrp_peer *peer, const char *purge_reason);
int nhrp_peer_match(struct nhrp_peer *peer, struct nhrp_peer_selector *sel);
int nhrp_peer_foreach(nhrp_peer_enumerator e, void *ctx,
struct nhrp_peer_selector *sel);
int nhrp_peer_remove_matching(void *count, struct nhrp_peer *peer);
int nhrp_peer_purge_matching(void *count, struct nhrp_peer *peer);
int nhrp_peer_lowerdown_matching(void *count, struct nhrp_peer *peer);
int nhrp_peer_set_used_matching(void *ctx, struct nhrp_peer *peer);
struct nhrp_peer *nhrp_peer_find_by_nbma(struct nhrp_interface *iface, struct nhrp_address *nbma);
int nhrp_peer_event_ok(union nhrp_peer_event e, int revents);
char *nhrp_peer_event_reason(union nhrp_peer_event e, int revents,
size_t buflen, char *buf);
struct nhrp_peer *nhrp_peer_from_event(union nhrp_peer_event e, int revents);
void nhrp_peer_run_script(struct nhrp_peer *peer, char *action,
void (*cb)(union nhrp_peer_event, int));
void nhrp_peer_send_packet_queue(struct nhrp_peer *peer);
int nhrp_peer_discover_nhs(struct nhrp_peer *peer,
struct nhrp_address *newaddr);
struct nhrp_peer *nhrp_peer_route_full(struct nhrp_interface *iface,
struct nhrp_address *dest,
int flags, int type_mask,
struct nhrp_address *source,
struct list_head *exclude_cie_list);
static inline struct nhrp_peer *nhrp_peer_route(struct nhrp_interface *iface,
struct nhrp_address *dest,
int flags, int type_mask)
{
return nhrp_peer_route_full(iface, dest, flags, type_mask, NULL, NULL);
}
void nhrp_peer_traffic_indication(struct nhrp_interface *iface,
uint16_t afnum, struct nhrp_address *dst);
void nhrp_peer_dump_cache(void);
void nhrp_server_finish_request(struct nhrp_pending_request *pr);
#endif
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