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/*
* BIRD Internet Routing Daemon -- Network Interfaces
*
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_IFACE_H_
#define _BIRD_IFACE_H_
#include "lib/lists.h"
extern list iface_list;
struct proto;
struct ifa { /* Interface address */
node n;
struct iface *iface; /* Interface this address belongs to */
ip_addr ip; /* IP address of this host */
ip_addr prefix; /* Network prefix */
unsigned pxlen; /* Prefix length */
ip_addr brd; /* Broadcast address */
ip_addr opposite; /* Opposite end of a point-to-point link */
unsigned scope; /* Interface address scope */
unsigned flags; /* Analogous to iface->flags */
};
struct iface {
node n;
char name[16];
unsigned flags;
unsigned mtu;
unsigned index; /* OS-dependent interface index */
list addrs; /* Addresses assigned to this interface */
struct ifa *addr; /* Primary address */
struct neighbor *neigh; /* List of neighbors on this interface */
};
#define IF_UP 1 /* IF_LINK_UP and IP address known */
#define IF_MULTIACCESS 2
#define IF_UNNUMBERED 4
#define IF_BROADCAST 8
#define IF_MULTICAST 0x10
#define IF_TUNNEL 0x20
#define IF_ADMIN_DOWN 0x40
#define IF_LOOPBACK 0x80
#define IF_IGNORE 0x100 /* Not to be used by routing protocols (loopbacks etc.) */
#define IF_LINK_UP 0x200
#define IA_PRIMARY 0x10000 /* This address is primary */
#define IA_SECONDARY 0x20000 /* This address has been reported as secondary by the kernel */
#define IA_FLAGS 0xff0000
#define IF_JUST_CREATED 0x10000000 /* Send creation event as soon as possible */
#define IF_TMP_DOWN 0x20000000 /* Temporary shutdown due to interface reconfiguration */
#define IF_UPDATED 0x40000000 /* Touched in last scan */
/* Interface change events */
#define IF_CHANGE_UP 1
#define IF_CHANGE_DOWN 2
#define IF_CHANGE_MTU 4
#define IF_CHANGE_CREATE 8 /* Seen this interface for the first time */
#define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */
void if_init(void);
void if_dump(struct iface *);
void if_dump_all(void);
void ifa_dump(struct ifa *);
struct iface *if_update(struct iface *);
struct ifa *ifa_update(struct ifa *);
void ifa_delete(struct ifa *);
void if_start_update(void);
void if_end_update(void);
void if_end_partial_update(struct iface *);
void if_feed_baby(struct proto *);
struct iface *if_find_by_index(unsigned);
struct iface *if_find_by_name(char *);
/*
* Neighbor Cache. We hold (direct neighbor, protocol) pairs we've seen
* along with pointer to protocol-specific data.
*
* The primary goal of this cache is to quickly validate all incoming
* packets if their have been sent by our neighbors and to notify
* protocols about lost neighbors when an interface goes down.
*
* Anyway, it can also contain `sticky' entries for currently unreachable
* addresses which cause notification when the address becomes a neighbor.
*/
typedef struct neighbor {
node n; /* Node in global neighbor list */
ip_addr addr; /* Address of the neighbor */
struct iface *iface; /* Interface it's connected to */
struct neighbor *sibling; /* Next in per-device chain */
struct proto *proto; /* Protocol this belongs to */
void *data; /* Protocol-specific data */
unsigned flags;
} neighbor;
#define NEF_STICKY 1
/*
* Find neighbor or return NULL if it doesn't exist.
* If you specify flags == NEF_STICKY, a sticky entry is created if the
* address is not a neighbor, but NULL can still be returned if the address
* given is invalid.
*/
neighbor *neigh_find(struct proto *, ip_addr *, unsigned flags);
void neigh_dump(neighbor *);
void neigh_dump_all(void);
void neigh_prune(void);
/*
* Interface Pattern Lists
*/
struct iface_patt {
node n;
byte *pattern; /* Interface name pattern */
ip_addr prefix; /* Interface prefix */
int pxlen;
/* Protocol-specific data follow after this structure */
};
struct iface_patt *iface_patt_match(list *, struct iface *);
int iface_patts_equal(list *, list *, int (*)(struct iface_patt *, struct iface_patt *));
#endif
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