[mirror_frr.git] / lib / if.h

/* Interface related header.
   Copyright (C) 1997, 98, 99 Kunihiro Ishiguro

This file is part of GNU Zebra.

GNU Zebra is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.

GNU Zebra is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Zebra; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#ifndef _ZEBRA_IF_H
#define _ZEBRA_IF_H

#include "linklist.h"

/*
  Interface name length.

   Linux define value in /usr/include/linux/if.h.
   #define IFNAMSIZ        16

   FreeBSD define value in /usr/include/net/if.h.
   #define IFNAMSIZ        16
*/

#define INTERFACE_NAMSIZ      20
#define INTERFACE_HWADDR_MAX  20

#ifdef HAVE_PROC_NET_DEV
struct if_stats
{
  unsigned long rx_packets;   /* total packets received       */
  unsigned long tx_packets;   /* total packets transmitted    */
  unsigned long rx_bytes;     /* total bytes received         */
  unsigned long tx_bytes;     /* total bytes transmitted      */
  unsigned long rx_errors;    /* bad packets received         */
  unsigned long tx_errors;    /* packet transmit problems     */
  unsigned long rx_dropped;   /* no space in linux buffers    */
  unsigned long tx_dropped;   /* no space available in linux  */
  unsigned long rx_multicast; /* multicast packets received   */
  unsigned long rx_compressed;
  unsigned long tx_compressed;
  unsigned long collisions;

  /* detailed rx_errors: */
  unsigned long rx_length_errors;
  unsigned long rx_over_errors;       /* receiver ring buff overflow  */
  unsigned long rx_crc_errors;        /* recved pkt with crc error    */
  unsigned long rx_frame_errors;      /* recv'd frame alignment error */
  unsigned long rx_fifo_errors;       /* recv'r fifo overrun          */
  unsigned long rx_missed_errors;     /* receiver missed packet     */
  /* detailed tx_errors */
  unsigned long tx_aborted_errors;
  unsigned long tx_carrier_errors;
  unsigned long tx_fifo_errors;
  unsigned long tx_heartbeat_errors;
  unsigned long tx_window_errors;
};
#endif /* HAVE_PROC_NET_DEV */

/* Interface structure */
struct interface 
{
  /* Interface name.  This should probably never be changed after the
     interface is created, because the configuration info for this interface
     is associated with this structure.  For that reason, the interface
     should also never be deleted (to avoid losing configuration info).
     To delete, just set ifindex to IFINDEX_INTERNAL to indicate that the
     interface does not exist in the kernel.
   */
  char name[INTERFACE_NAMSIZ + 1];

  /* Interface index (should be IFINDEX_INTERNAL for non-kernel or
     deleted interfaces). */
  unsigned int ifindex;
#define IFINDEX_INTERNAL	0

  /* Zebra internal interface status */
  u_char status;
#define ZEBRA_INTERFACE_ACTIVE     (1 << 0)
#define ZEBRA_INTERFACE_SUB        (1 << 1)
#define ZEBRA_INTERFACE_LINKDETECTION (1 << 2)
  
  /* Interface flags. */
  uint64_t flags;

  /* Interface metric */
  int metric;

  /* Interface MTU. */
  unsigned int mtu;    /* IPv4 MTU */
  unsigned int mtu6;   /* IPv6 MTU - probably, but not neccessarily same as mtu */

  /* Hardware address. */
#ifdef HAVE_STRUCT_SOCKADDR_DL
  union {
    /* note that sdl_storage is never accessed, it only exists to make space.
     * all actual uses refer to sdl - but use sizeof(sdl_storage)!  this fits
     * best with C aliasing rules. */
    struct sockaddr_dl sdl;
    struct sockaddr_storage sdl_storage;
  };
#else
  unsigned short hw_type;
  u_char hw_addr[INTERFACE_HWADDR_MAX];
  int hw_addr_len;
#endif /* HAVE_STRUCT_SOCKADDR_DL */

  /* interface bandwidth, kbits */
  unsigned int bandwidth;
  
  /* description of the interface. */
  char *desc;			

  /* Distribute list. */
  void *distribute_in;
  void *distribute_out;

  /* Connected address list. */
  struct list *connected;

  /* Neighbor connected address list. */
  struct list *nbr_connected;

  /* Daemon specific interface data pointer. */
  void *info;

  /* Statistics fileds. */
#ifdef HAVE_PROC_NET_DEV
  struct if_stats stats;
#endif /* HAVE_PROC_NET_DEV */  
#ifdef HAVE_NET_RT_IFLIST
  struct if_data stats;
#endif /* HAVE_NET_RT_IFLIST */
};

/* Connected address structure. */
struct connected
{
  /* Attached interface. */
  struct interface *ifp;

  /* Flags for configuration. */
  u_char conf;
#define ZEBRA_IFC_REAL         (1 << 0)
#define ZEBRA_IFC_CONFIGURED   (1 << 1)
#define ZEBRA_IFC_QUEUED       (1 << 2)
  /*
     The ZEBRA_IFC_REAL flag should be set if and only if this address
     exists in the kernel and is actually usable. (A case where it exists but
     is not yet usable would be IPv6 with DAD)
     The ZEBRA_IFC_CONFIGURED flag should be set if and only if this address
     was configured by the user from inside quagga.
     The ZEBRA_IFC_QUEUED flag should be set if and only if the address exists
     in the kernel. It may and should be set although the address might not be
     usable yet. (compare with ZEBRA_IFC_REAL)
   */

  /* Flags for connected address. */
  u_char flags;
#define ZEBRA_IFA_SECONDARY    (1 << 0)
#define ZEBRA_IFA_PEER         (1 << 1)
  /* N.B. the ZEBRA_IFA_PEER flag should be set if and only if
     a peer address has been configured.  If this flag is set,
     the destination field must contain the peer address.  
     Otherwise, if this flag is not set, the destination address
     will either contain a broadcast address or be NULL.
   */

  /* Address of connected network. */
  struct prefix *address;

  /* Peer or Broadcast address, depending on whether ZEBRA_IFA_PEER is set.
     Note: destination may be NULL if ZEBRA_IFA_PEER is not set. */
  struct prefix *destination;

  /* Label for Linux 2.2.X and upper. */
  char *label;
};

/* Nbr Connected address structure. */
struct nbr_connected
{
  /* Attached interface. */
  struct interface *ifp;

  /* Address of connected network. */
  struct prefix *address;
};

/* Does the destination field contain a peer address? */
#define CONNECTED_PEER(C) CHECK_FLAG((C)->flags, ZEBRA_IFA_PEER)

/* Prefix to insert into the RIB */
#define CONNECTED_PREFIX(C) \
	(CONNECTED_PEER(C) ? (C)->destination : (C)->address)

/* Identifying address.  We guess that if there's a peer address, but the
   local address is in the same prefix, then the local address may be unique. */
#define CONNECTED_ID(C)	\
	((CONNECTED_PEER(C) && !prefix_match((C)->destination, (C)->address)) ?\
	 (C)->destination : (C)->address)

/* Interface hook sort. */
#define IF_NEW_HOOK   0
#define IF_DELETE_HOOK 1

/* There are some interface flags which are only supported by some
   operating system. */

#ifndef IFF_NOTRAILERS
#define IFF_NOTRAILERS 0x0
#endif /* IFF_NOTRAILERS */
#ifndef IFF_OACTIVE
#define IFF_OACTIVE 0x0
#endif /* IFF_OACTIVE */
#ifndef IFF_SIMPLEX
#define IFF_SIMPLEX 0x0
#endif /* IFF_SIMPLEX */
#ifndef IFF_LINK0
#define IFF_LINK0 0x0
#endif /* IFF_LINK0 */
#ifndef IFF_LINK1
#define IFF_LINK1 0x0
#endif /* IFF_LINK1 */
#ifndef IFF_LINK2
#define IFF_LINK2 0x0
#endif /* IFF_LINK2 */
#ifndef IFF_NOXMIT
#define IFF_NOXMIT 0x0
#endif /* IFF_NOXMIT */
#ifndef IFF_NORTEXCH
#define IFF_NORTEXCH 0x0
#endif /* IFF_NORTEXCH */
#ifndef IFF_IPV4
#define IFF_IPV4 0x0
#endif /* IFF_IPV4 */
#ifndef IFF_IPV6
#define IFF_IPV6 0x0
#endif /* IFF_IPV6 */
#ifndef IFF_VIRTUAL
#define IFF_VIRTUAL 0x0
#endif /* IFF_VIRTUAL */

/* Prototypes. */
extern int if_cmp_func (struct interface *, struct interface *);
extern struct interface *if_create (const char *name, int namelen);
extern struct interface *if_lookup_by_index (unsigned int);
extern struct interface *if_lookup_exact_address (struct in_addr);
extern struct interface *if_lookup_address (struct in_addr);
extern struct interface *if_lookup_prefix (struct prefix *prefix);

/* These 2 functions are to be used when the ifname argument is terminated
   by a '\0' character: */
extern struct interface *if_lookup_by_name (const char *ifname);
extern struct interface *if_get_by_name (const char *ifname);

/* For these 2 functions, the namelen argument should be the precise length
   of the ifname string (not counting any optional trailing '\0' character).
   In most cases, strnlen should be used to calculate the namelen value. */
extern struct interface *if_lookup_by_name_len(const char *ifname,
					       size_t namelen);
extern struct interface *if_get_by_name_len(const char *ifname, size_t namelen);


/* Delete the interface, but do not free the structure, and leave it in the
   interface list.  It is often advisable to leave the pseudo interface 
   structure because there may be configuration information attached. */
extern void if_delete_retain (struct interface *);

/* Delete and free the interface structure: calls if_delete_retain and then
   deletes it from the interface list and frees the structure. */
extern void if_delete (struct interface *);

extern int if_is_up (struct interface *);
extern int if_is_running (struct interface *);
extern int if_is_operative (struct interface *);
extern int if_is_loopback (struct interface *);
extern int if_is_broadcast (struct interface *);
extern int if_is_pointopoint (struct interface *);
extern int if_is_multicast (struct interface *);
extern void if_add_hook (int, int (*)(struct interface *));
extern void if_init (void);
extern void if_terminate (void);
extern void if_dump_all (void);
extern const char *if_flag_dump(unsigned long);

/* Please use ifindex2ifname instead of if_indextoname where possible;
   ifindex2ifname uses internal interface info, whereas if_indextoname must
   make a system call. */
extern const char *ifindex2ifname (unsigned int);

/* Please use ifname2ifindex instead of if_nametoindex where possible;
   ifname2ifindex uses internal interface info, whereas if_nametoindex must
   make a system call. */
extern unsigned int ifname2ifindex(const char *ifname);

/* Connected address functions. */
extern struct connected *connected_new (void);
extern void connected_free (struct connected *);
extern void connected_add (struct interface *, struct connected *);
extern struct connected  *connected_add_by_prefix (struct interface *,
                                            struct prefix *,
                                            struct prefix *);
extern struct connected  *connected_delete_by_prefix (struct interface *, 
                                               struct prefix *);
extern struct connected  *connected_lookup_address (struct interface *, 
                                             struct in_addr);
extern struct nbr_connected *nbr_connected_new (void);
extern void nbr_connected_free (struct nbr_connected *);
struct nbr_connected *nbr_connected_check (struct interface *, struct prefix *);

#ifndef HAVE_IF_NAMETOINDEX
extern unsigned int if_nametoindex (const char *);
#endif
#ifndef HAVE_IF_INDEXTONAME
extern char *if_indextoname (unsigned int, char *);
#endif

/* Exported variables. */
extern struct list *iflist;
extern struct cmd_element interface_desc_cmd;
extern struct cmd_element no_interface_desc_cmd;
extern struct cmd_element interface_cmd;
extern struct cmd_element no_interface_cmd;
extern struct cmd_element interface_pseudo_cmd;
extern struct cmd_element no_interface_pseudo_cmd;
extern struct cmd_element show_address_cmd;

#endif /* _ZEBRA_IF_H */
Commit	Line	Data
718e3744	1	/* Interface related header.
	2	Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
	3
	4	This file is part of GNU Zebra.
	5
	6	GNU Zebra is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published
	8	by the Free Software Foundation; either version 2, or (at your
	9	option) any later version.
	10
	11	GNU Zebra is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Zebra; see the file COPYING. If not, write to the
	18	Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
	21	#ifndef _ZEBRA_IF_H
	22	#define _ZEBRA_IF_H
	23
	24	#include "linklist.h"
	25
	26	/*
	27	Interface name length.
	28
	29	Linux define value in /usr/include/linux/if.h.
	30	#define IFNAMSIZ 16
	31
	32	FreeBSD define value in /usr/include/net/if.h.
	33	#define IFNAMSIZ 16
	34	*/
	35
	36	#define INTERFACE_NAMSIZ 20
	37	#define INTERFACE_HWADDR_MAX 20
	38
718e3744	39	#ifdef HAVE_PROC_NET_DEV
	40	struct if_stats
	41	{
	42	unsigned long rx_packets; /* total packets received */
	43	unsigned long tx_packets; /* total packets transmitted */
	44	unsigned long rx_bytes; /* total bytes received */
	45	unsigned long tx_bytes; /* total bytes transmitted */
	46	unsigned long rx_errors; /* bad packets received */
	47	unsigned long tx_errors; /* packet transmit problems */
	48	unsigned long rx_dropped; /* no space in linux buffers */
	49	unsigned long tx_dropped; /* no space available in linux */
	50	unsigned long rx_multicast; /* multicast packets received */
	51	unsigned long rx_compressed;
	52	unsigned long tx_compressed;
	53	unsigned long collisions;
	54
	55	/* detailed rx_errors: */
	56	unsigned long rx_length_errors;
	57	unsigned long rx_over_errors; /* receiver ring buff overflow */
	58	unsigned long rx_crc_errors; /* recved pkt with crc error */
	59	unsigned long rx_frame_errors; /* recv'd frame alignment error */
	60	unsigned long rx_fifo_errors; /* recv'r fifo overrun */
	61	unsigned long rx_missed_errors; /* receiver missed packet */
	62	/* detailed tx_errors */
	63	unsigned long tx_aborted_errors;
	64	unsigned long tx_carrier_errors;
	65	unsigned long tx_fifo_errors;
	66	unsigned long tx_heartbeat_errors;
	67	unsigned long tx_window_errors;
	68	};
	69	#endif /* HAVE_PROC_NET_DEV */
	70
	71	/* Interface structure */
	72	struct interface
	73	{
d2fc8896	74	/* Interface name. This should probably never be changed after the
	75	interface is created, because the configuration info for this interface
	76	is associated with this structure. For that reason, the interface
	77	should also never be deleted (to avoid losing configuration info).
	78	To delete, just set ifindex to IFINDEX_INTERNAL to indicate that the
	79	interface does not exist in the kernel.
	80	*/
718e3744	81	char name[INTERFACE_NAMSIZ + 1];
718e3744	82
d2fc8896	83	/* Interface index (should be IFINDEX_INTERNAL for non-kernel or
d2fc8896	84	deleted interfaces). */
718e3744	85	unsigned int ifindex;
d2fc8896	86	#define IFINDEX_INTERNAL 0
718e3744	87
	88	/* Zebra internal interface status */
	89	u_char status;
	90	#define ZEBRA_INTERFACE_ACTIVE (1 << 0)
	91	#define ZEBRA_INTERFACE_SUB (1 << 1)
2e3b2e47	92	#define ZEBRA_INTERFACE_LINKDETECTION (1 << 2)
718e3744	93
718e3744	94	/* Interface flags. */
c77d4546	95	uint64_t flags;
718e3744	96
	97	/* Interface metric */
	98	int metric;
	99
	100	/* Interface MTU. */
c9eca01b	101	unsigned int mtu; /* IPv4 MTU */
c9eca01b	102	unsigned int mtu6; /* IPv6 MTU - probably, but not neccessarily same as mtu */
718e3744	103
718e3744	104	/* Hardware address. */
6f0e3f6e	105	#ifdef HAVE_STRUCT_SOCKADDR_DL
ca3ccd87 DL	106	union {
	107	/* note that sdl_storage is never accessed, it only exists to make space.
	108	* all actual uses refer to sdl - but use sizeof(sdl_storage)! this fits
	109	* best with C aliasing rules. */
	110	struct sockaddr_dl sdl;
	111	struct sockaddr_storage sdl_storage;
	112	};
718e3744	113	#else
	114	unsigned short hw_type;
	115	u_char hw_addr[INTERFACE_HWADDR_MAX];
	116	int hw_addr_len;
6f0e3f6e	117	#endif /* HAVE_STRUCT_SOCKADDR_DL */
718e3744	118
	119	/* interface bandwidth, kbits */
	120	unsigned int bandwidth;
	121
	122	/* description of the interface. */
	123	char *desc;
	124
	125	/* Distribute list. */
	126	void *distribute_in;
	127	void *distribute_out;
	128
	129	/* Connected address list. */
52dc7ee6	130	struct list *connected;
718e3744	131
a80beece DS	132	/* Neighbor connected address list. */
	133	struct list *nbr_connected;
	134
718e3744	135	/* Daemon specific interface data pointer. */
	136	void *info;
	137
	138	/* Statistics fileds. */
	139	#ifdef HAVE_PROC_NET_DEV
	140	struct if_stats stats;
	141	#endif /* HAVE_PROC_NET_DEV */
	142	#ifdef HAVE_NET_RT_IFLIST
	143	struct if_data stats;
	144	#endif /* HAVE_NET_RT_IFLIST */
	145	};
	146
	147	/* Connected address structure. */
	148	struct connected
	149	{
	150	/* Attached interface. */
	151	struct interface *ifp;
	152
	153	/* Flags for configuration. */
	154	u_char conf;
	155	#define ZEBRA_IFC_REAL (1 << 0)
	156	#define ZEBRA_IFC_CONFIGURED (1 << 1)
f7f740fe	157	#define ZEBRA_IFC_QUEUED (1 << 2)
9c37851e AS	158	/*
9c37851e AS	159	The ZEBRA_IFC_REAL flag should be set if and only if this address
f7f740fe CF	160	exists in the kernel and is actually usable. (A case where it exists but
f7f740fe CF	161	is not yet usable would be IPv6 with DAD)
9c37851e AS	162	The ZEBRA_IFC_CONFIGURED flag should be set if and only if this address
9c37851e AS	163	was configured by the user from inside quagga.
f7f740fe CF	164	The ZEBRA_IFC_QUEUED flag should be set if and only if the address exists
	165	in the kernel. It may and should be set although the address might not be
	166	usable yet. (compare with ZEBRA_IFC_REAL)
9c37851e	167	*/
718e3744	168
	169	/* Flags for connected address. */
	170	u_char flags;
e4529636 AS	171	#define ZEBRA_IFA_SECONDARY (1 << 0)
	172	#define ZEBRA_IFA_PEER (1 << 1)
	173	/* N.B. the ZEBRA_IFA_PEER flag should be set if and only if
	174	a peer address has been configured. If this flag is set,
	175	the destination field must contain the peer address.
	176	Otherwise, if this flag is not set, the destination address
	177	will either contain a broadcast address or be NULL.
	178	*/
718e3744	179
	180	/* Address of connected network. */
	181	struct prefix *address;
e4529636 AS	182
	183	/* Peer or Broadcast address, depending on whether ZEBRA_IFA_PEER is set.
	184	Note: destination may be NULL if ZEBRA_IFA_PEER is not set. */
	185	struct prefix *destination;
718e3744	186
	187	/* Label for Linux 2.2.X and upper. */
	188	char *label;
	189	};
	190
a80beece DS	191	/* Nbr Connected address structure. */
	192	struct nbr_connected
	193	{
	194	/* Attached interface. */
	195	struct interface *ifp;
	196
	197	/* Address of connected network. */
	198	struct prefix *address;
	199	};
	200
e4529636 AS	201	/* Does the destination field contain a peer address? */
	202	#define CONNECTED_PEER(C) CHECK_FLAG((C)->flags, ZEBRA_IFA_PEER)
	203
	204	/* Prefix to insert into the RIB */
	205	#define CONNECTED_PREFIX(C) \
	206	(CONNECTED_PEER(C) ? (C)->destination : (C)->address)
3fb9cd6e	207
e4529636 AS	208	/* Identifying address. We guess that if there's a peer address, but the
	209	local address is in the same prefix, then the local address may be unique. */
	210	#define CONNECTED_ID(C) \
	211	((CONNECTED_PEER(C) && !prefix_match((C)->destination, (C)->address)) ?\
	212	(C)->destination : (C)->address)
3fb9cd6e	213
718e3744	214	/* Interface hook sort. */
	215	#define IF_NEW_HOOK 0
	216	#define IF_DELETE_HOOK 1
	217
	218	/* There are some interface flags which are only supported by some
	219	operating system. */
	220
	221	#ifndef IFF_NOTRAILERS
	222	#define IFF_NOTRAILERS 0x0
	223	#endif /* IFF_NOTRAILERS */
	224	#ifndef IFF_OACTIVE
	225	#define IFF_OACTIVE 0x0
	226	#endif /* IFF_OACTIVE */
	227	#ifndef IFF_SIMPLEX
	228	#define IFF_SIMPLEX 0x0
	229	#endif /* IFF_SIMPLEX */
	230	#ifndef IFF_LINK0
	231	#define IFF_LINK0 0x0
	232	#endif /* IFF_LINK0 */
	233	#ifndef IFF_LINK1
	234	#define IFF_LINK1 0x0
	235	#endif /* IFF_LINK1 */
	236	#ifndef IFF_LINK2
	237	#define IFF_LINK2 0x0
	238	#endif /* IFF_LINK2 */
4ba9b924	239	#ifndef IFF_NOXMIT
	240	#define IFF_NOXMIT 0x0
	241	#endif /* IFF_NOXMIT */
	242	#ifndef IFF_NORTEXCH
	243	#define IFF_NORTEXCH 0x0
	244	#endif /* IFF_NORTEXCH */
	245	#ifndef IFF_IPV4
	246	#define IFF_IPV4 0x0
	247	#endif /* IFF_IPV4 */
	248	#ifndef IFF_IPV6
	249	#define IFF_IPV6 0x0
	250	#endif /* IFF_IPV6 */
	251	#ifndef IFF_VIRTUAL
	252	#define IFF_VIRTUAL 0x0
	253	#endif /* IFF_VIRTUAL */
718e3744	254
718e3744	255	/* Prototypes. */
8cc4198f	256	extern int if_cmp_func (struct interface , struct interface );
	257	extern struct interface if_create (const char name, int namelen);
	258	extern struct interface *if_lookup_by_index (unsigned int);
	259	extern struct interface *if_lookup_exact_address (struct in_addr);
	260	extern struct interface *if_lookup_address (struct in_addr);
b81e97a8	261	extern struct interface if_lookup_prefix (struct prefix prefix);
a349198f	262
08dbfb69	263	/* These 2 functions are to be used when the ifname argument is terminated
08dbfb69	264	by a '\0' character: */
8cc4198f	265	extern struct interface if_lookup_by_name (const char ifname);
8cc4198f	266	extern struct interface if_get_by_name (const char ifname);
08dbfb69	267
	268	/* For these 2 functions, the namelen argument should be the precise length
	269	of the ifname string (not counting any optional trailing '\0' character).
	270	In most cases, strnlen should be used to calculate the namelen value. */
	271	extern struct interface if_lookup_by_name_len(const char ifname,
a349198f	272	size_t namelen);
08dbfb69	273	extern struct interface if_get_by_name_len(const char ifname, size_t namelen);
a349198f	274
a349198f	275
d2fc8896	276	/* Delete the interface, but do not free the structure, and leave it in the
	277	interface list. It is often advisable to leave the pseudo interface
	278	structure because there may be configuration information attached. */
	279	extern void if_delete_retain (struct interface *);
	280
	281	/* Delete and free the interface structure: calls if_delete_retain and then
	282	deletes it from the interface list and frees the structure. */
	283	extern void if_delete (struct interface *);
	284
8cc4198f	285	extern int if_is_up (struct interface *);
	286	extern int if_is_running (struct interface *);
	287	extern int if_is_operative (struct interface *);
	288	extern int if_is_loopback (struct interface *);
	289	extern int if_is_broadcast (struct interface *);
	290	extern int if_is_pointopoint (struct interface *);
	291	extern int if_is_multicast (struct interface *);
	292	extern void if_add_hook (int, int ()(struct interface ));
	293	extern void if_init (void);
4bd045d5	294	extern void if_terminate (void);
8cc4198f	295	extern void if_dump_all (void);
847947f2	296	extern const char *if_flag_dump(unsigned long);
718e3744	297
d2fc8896	298	/* Please use ifindex2ifname instead of if_indextoname where possible;
	299	ifindex2ifname uses internal interface info, whereas if_indextoname must
	300	make a system call. */
8cc4198f	301	extern const char *ifindex2ifname (unsigned int);
d2fc8896	302
	303	/* Please use ifname2ifindex instead of if_nametoindex where possible;
	304	ifname2ifindex uses internal interface info, whereas if_nametoindex must
	305	make a system call. */
	306	extern unsigned int ifname2ifindex(const char *ifname);
	307
718e3744	308	/* Connected address functions. */
8cc4198f	309	extern struct connected *connected_new (void);
	310	extern void connected_free (struct connected *);
	311	extern void connected_add (struct interface , struct connected );
	312	extern struct connected connected_add_by_prefix (struct interface ,
4a7aac1b	313	struct prefix *,
4a7aac1b	314	struct prefix *);
8cc4198f	315	extern struct connected connected_delete_by_prefix (struct interface ,
4a7aac1b	316	struct prefix *);
8cc4198f	317	extern struct connected connected_lookup_address (struct interface ,
4a7aac1b	318	struct in_addr);
a80beece DS	319	extern struct nbr_connected *nbr_connected_new (void);
	320	extern void nbr_connected_free (struct nbr_connected *);
	321	struct nbr_connected nbr_connected_check (struct interface , struct prefix *);
718e3744	322
718e3744	323	#ifndef HAVE_IF_NAMETOINDEX
8cc4198f	324	extern unsigned int if_nametoindex (const char *);
718e3744	325	#endif
718e3744	326	#ifndef HAVE_IF_INDEXTONAME
8cc4198f	327	extern char if_indextoname (unsigned int, char );
718e3744	328	#endif
	329
	330	/* Exported variables. */
52dc7ee6	331	extern struct list *iflist;
718e3744	332	extern struct cmd_element interface_desc_cmd;
	333	extern struct cmd_element no_interface_desc_cmd;
	334	extern struct cmd_element interface_cmd;
32d2463c	335	extern struct cmd_element no_interface_cmd;
718e3744	336	extern struct cmd_element interface_pseudo_cmd;
718e3744	337	extern struct cmd_element no_interface_pseudo_cmd;
478ccfd6	338	extern struct cmd_element show_address_cmd;
718e3744	339
718e3744	340	#endif /* _ZEBRA_IF_H */