90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
|
|
* BIRD Internet Routing Daemon -- Network Interfaces
|
|
*
|
|
* (c) 1998 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 iface {
|
|
node n;
|
|
char name[16];
|
|
unsigned flags;
|
|
unsigned mtu;
|
|
unsigned index; /* OS-dependent interface index */
|
|
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 */
|
|
struct neighbor *neigh; /* List of neighbors on this interface */
|
|
};
|
|
|
|
#define IF_UP 1
|
|
#define IF_MULTIACCESS 2
|
|
#define IF_UNNUMBERED 4
|
|
#define IF_BROADCAST 8
|
|
#define IF_MULTICAST 16
|
|
#define IF_TUNNEL 32
|
|
#define IF_ADMIN_DOWN 64
|
|
#define IF_LOOPBACK 128
|
|
#define IF_IGNORE 256
|
|
#define IF_UPDATED 0x1000 /* Touched in last scan */
|
|
|
|
/* Interface change events */
|
|
|
|
#define IF_CHANGE_UP 1
|
|
#define IF_CHANGE_DOWN 2
|
|
#define IF_CHANGE_FLAGS 4 /* Can be converted to down/up internally */
|
|
#define IF_CHANGE_MTU 8
|
|
#define IF_CHANGE_CREATE 16 /* Seen this interface for the first time */
|
|
|
|
void if_init(void);
|
|
void if_dump(struct iface *);
|
|
void if_dump_all(void);
|
|
void if_update(struct iface *);
|
|
void if_end_update(void);
|
|
|
|
/*
|
|
* 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 address 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);
|
|
|
|
#endif
|