[unix-history] / usr / src / sys / net / if.h

/*
 * Copyright (c) 1982, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)if.h	8.1 (Berkeley) %G%
 */

/*
 * Structures defining a network interface, providing a packet
 * transport mechanism (ala level 0 of the PUP protocols).
 *
 * Each interface accepts output datagrams of a specified maximum
 * length, and provides higher level routines with input datagrams
 * received from its medium.
 *
 * Output occurs when the routine if_output is called, with three parameters:
 *	(*ifp->if_output)(ifp, m, dst, rt)
 * Here m is the mbuf chain to be sent and dst is the destination address.
 * The output routine encapsulates the supplied datagram if necessary,
 * and then transmits it on its medium.
 *
 * On input, each interface unwraps the data received by it, and either
 * places it on the input queue of a internetwork datagram routine
 * and posts the associated software interrupt, or passes the datagram to a raw
 * packet input routine.
 *
 * Routines exist for locating interfaces by their addresses
 * or for locating a interface on a certain network, as well as more general
 * routing and gateway routines maintaining information used to locate
 * interfaces.  These routines live in the files if.c and route.c
 */
#ifndef _TIME_ /*  XXX fast fix for SNMP, going away soon */
#include <sys/time.h>
#endif

#ifdef __STDC__
/*
 * Forward structure declarations for function prototypes [sic].
 */
struct	mbuf;
struct	proc;
struct	rtentry;	
struct	socket;
struct	ether_header;
#endif
/*
 * Structure describing information about an interface
 * which may be of interest to management entities.
 */
/*
 * Structure defining a queue for a network interface.
 *
 * (Would like to call this struct ``if'', but C isn't PL/1.)
 */

struct ifnet {
	char	*if_name;		/* name, e.g. ``en'' or ``lo'' */
	struct	ifnet *if_next;		/* all struct ifnets are chained */
	struct	ifaddr *if_addrlist;	/* linked list of addresses per if */
        int	if_pcount;		/* number of promiscuous listeners */
	caddr_t	if_bpf;			/* packet filter structure */
	u_short	if_index;		/* numeric abbreviation for this if  */
	short	if_unit;		/* sub-unit for lower level driver */
	short	if_timer;		/* time 'til if_watchdog called */
	short	if_flags;		/* up/down, broadcast, etc. */
	struct	if_data {
/* generic interface information */
		u_char	ifi_type;	/* ethernet, tokenring, etc */
		u_char	ifi_addrlen;	/* media address length */
		u_char	ifi_hdrlen;	/* media header length */
		u_long	ifi_mtu;	/* maximum transmission unit */
		u_long	ifi_metric;	/* routing metric (external only) */
		u_long	ifi_baudrate;	/* linespeed */
/* volatile statistics */
		u_long	ifi_ipackets;	/* packets received on interface */
		u_long	ifi_ierrors;	/* input errors on interface */
		u_long	ifi_opackets;	/* packets sent on interface */
		u_long	ifi_oerrors;	/* output errors on interface */
		u_long	ifi_collisions;	/* collisions on csma interfaces */
		u_long	ifi_ibytes;	/* total number of octets received */
		u_long	ifi_obytes;	/* total number of octets sent */
		u_long	ifi_imcasts;	/* packets received via multicast */
		u_long	ifi_omcasts;	/* packets sent via multicast */
		u_long	ifi_iqdrops;	/* dropped on input, this interface */
		u_long	ifi_noproto;	/* destined for unsupported protocol */
		struct	timeval ifi_lastchange;/* last updated */
	}	if_data;
/* procedure handles */
	int	(*if_init)		/* init routine */
		__P((int));
	int	(*if_output)		/* output routine (enqueue) */
		__P((struct ifnet *, struct mbuf *, struct sockaddr *,
		     struct rtentry *));
	int	(*if_start)		/* initiate output routine */
		__P((struct ifnet *));
	int	(*if_done)		/* output complete routine */
		__P((struct ifnet *));	/* (XXX not used; fake prototype) */
	int	(*if_ioctl)		/* ioctl routine */
		__P((struct ifnet *, int, caddr_t));
	int	(*if_reset)	
		__P((int));		/* new autoconfig will permit removal */
	int	(*if_watchdog)		/* timer routine */
		__P((int));
	struct	ifqueue {
		struct	mbuf *ifq_head;
		struct	mbuf *ifq_tail;
		int	ifq_len;
		int	ifq_maxlen;
		int	ifq_drops;
	} if_snd;			/* output queue */
};
#define	if_mtu		if_data.ifi_mtu
#define	if_type		if_data.ifi_type
#define	if_addrlen	if_data.ifi_addrlen
#define	if_hdrlen	if_data.ifi_hdrlen
#define	if_metric	if_data.ifi_metric
#define	if_baudrate	if_data.ifi_baudrate
#define	if_ipackets	if_data.ifi_ipackets
#define	if_ierrors	if_data.ifi_ierrors
#define	if_opackets	if_data.ifi_opackets
#define	if_oerrors	if_data.ifi_oerrors
#define	if_collisions	if_data.ifi_collisions
#define	if_ibytes	if_data.ifi_ibytes
#define	if_obytes	if_data.ifi_obytes
#define	if_imcasts	if_data.ifi_imcasts
#define	if_omcasts	if_data.ifi_omcasts
#define	if_iqdrops	if_data.ifi_iqdrops
#define	if_noproto	if_data.ifi_noproto
#define	if_lastchange	if_data.ifi_lastchange

#define	IFF_UP		0x1		/* interface is up */
#define	IFF_BROADCAST	0x2		/* broadcast address valid */
#define	IFF_DEBUG	0x4		/* turn on debugging */
#define	IFF_LOOPBACK	0x8		/* is a loopback net */
#define	IFF_POINTOPOINT	0x10		/* interface is point-to-point link */
#define	IFF_NOTRAILERS	0x20		/* avoid use of trailers */
#define	IFF_RUNNING	0x40		/* resources allocated */
#define	IFF_NOARP	0x80		/* no address resolution protocol */
#define	IFF_PROMISC	0x100		/* receive all packets */
#define	IFF_ALLMULTI	0x200		/* receive all multicast packets */
#define	IFF_OACTIVE	0x400		/* transmission in progress */
#define	IFF_SIMPLEX	0x800		/* can't hear own transmissions */
#define	IFF_LINK0	0x1000		/* per link layer defined bit */
#define	IFF_LINK1	0x2000		/* per link layer defined bit */
#define	IFF_LINK2	0x4000		/* per link layer defined bit */
#define	IFF_MULTICAST	0x8000		/* supports multicast */

/* flags set internally only: */
#define	IFF_CANTCHANGE \
	(IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
	    IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI)

/*
 * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
 * input routines have queues of messages stored on ifqueue structures
 * (defined above).  Entries are added to and deleted from these structures
 * by these macros, which should be called with ipl raised to splimp().
 */
#define	IF_QFULL(ifq)		((ifq)->ifq_len >= (ifq)->ifq_maxlen)
#define	IF_DROP(ifq)		((ifq)->ifq_drops++)
#define	IF_ENQUEUE(ifq, m) { \
	(m)->m_nextpkt = 0; \
	if ((ifq)->ifq_tail == 0) \
		(ifq)->ifq_head = m; \
	else \
		(ifq)->ifq_tail->m_nextpkt = m; \
	(ifq)->ifq_tail = m; \
	(ifq)->ifq_len++; \
}
#define	IF_PREPEND(ifq, m) { \
	(m)->m_nextpkt = (ifq)->ifq_head; \
	if ((ifq)->ifq_tail == 0) \
		(ifq)->ifq_tail = (m); \
	(ifq)->ifq_head = (m); \
	(ifq)->ifq_len++; \
}
#define	IF_DEQUEUE(ifq, m) { \
	(m) = (ifq)->ifq_head; \
	if (m) { \
		if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
			(ifq)->ifq_tail = 0; \
		(m)->m_nextpkt = 0; \
		(ifq)->ifq_len--; \
	} \
}

#define	IFQ_MAXLEN	50
#define	IFNET_SLOWHZ	1		/* granularity is 1 second */

/*
 * The ifaddr structure contains information about one address
 * of an interface.  They are maintained by the different address families,
 * are allocated and attached when an address is set, and are linked
 * together so all addresses for an interface can be located.
 */
struct ifaddr {
	struct	sockaddr *ifa_addr;	/* address of interface */
	struct	sockaddr *ifa_dstaddr;	/* other end of p-to-p link */
#define	ifa_broadaddr	ifa_dstaddr	/* broadcast address interface */
	struct	sockaddr *ifa_netmask;	/* used to determine subnet */
	struct	ifnet *ifa_ifp;		/* back-pointer to interface */
	struct	ifaddr *ifa_next;	/* next address for interface */
	void	(*ifa_rtrequest)();	/* check or clean routes (+ or -)'d */
	u_short	ifa_flags;		/* mostly rt_flags for cloning */
	short	ifa_refcnt;		/* extra to malloc for link info */
	int	ifa_metric;		/* cost of going out this interface */
#ifdef notdef
	struct	rtentry *ifa_rt;	/* XXXX for ROUTETOIF ????? */
#endif
};
#define	IFA_ROUTE	RTF_UP		/* route installed */

/*
 * Message format for use in obtaining information about interfaces
 * from getkerninfo and the routing socket
 */
struct if_msghdr {
	u_short	ifm_msglen;	/* to skip over non-understood messages */
	u_char	ifm_version;	/* future binary compatability */
	u_char	ifm_type;	/* message type */
	int	ifm_addrs;	/* like rtm_addrs */
	int	ifm_flags;	/* value of if_flags */
	u_short	ifm_index;	/* index for associated ifp */
	struct	if_data ifm_data;/* statistics and other data about if */
};

/*
 * Message format for use in obtaining information about interface addresses
 * from getkerninfo and the routing socket
 */
struct ifa_msghdr {
	u_short	ifam_msglen;	/* to skip over non-understood messages */
	u_char	ifam_version;	/* future binary compatability */
	u_char	ifam_type;	/* message type */
	int	ifam_addrs;	/* like rtm_addrs */
	int	ifam_flags;	/* value of ifa_flags */
	u_short	ifam_index;	/* index for associated ifp */
	int	ifam_metric;	/* value of ifa_metric */
};

/*
 * Interface request structure used for socket
 * ioctl's.  All interface ioctl's must have parameter
 * definitions which begin with ifr_name.  The
 * remainder may be interface specific.
 */
struct	ifreq {
#define	IFNAMSIZ	16
	char	ifr_name[IFNAMSIZ];		/* if name, e.g. "en0" */
	union {
		struct	sockaddr ifru_addr;
		struct	sockaddr ifru_dstaddr;
		struct	sockaddr ifru_broadaddr;
		short	ifru_flags;
		int	ifru_metric;
		caddr_t	ifru_data;
	} ifr_ifru;
#define	ifr_addr	ifr_ifru.ifru_addr	/* address */
#define	ifr_dstaddr	ifr_ifru.ifru_dstaddr	/* other end of p-to-p link */
#define	ifr_broadaddr	ifr_ifru.ifru_broadaddr	/* broadcast address */
#define	ifr_flags	ifr_ifru.ifru_flags	/* flags */
#define	ifr_metric	ifr_ifru.ifru_metric	/* metric */
#define	ifr_data	ifr_ifru.ifru_data	/* for use by interface */
};

struct ifaliasreq {
	char	ifra_name[IFNAMSIZ];		/* if name, e.g. "en0" */
	struct	sockaddr ifra_addr;
	struct	sockaddr ifra_broadaddr;
	struct	sockaddr ifra_mask;
};

/*
 * Structure used in SIOCGIFCONF request.
 * Used to retrieve interface configuration
 * for machine (useful for programs which
 * must know all networks accessible).
 */
struct	ifconf {
	int	ifc_len;		/* size of associated buffer */
	union {
		caddr_t	ifcu_buf;
		struct	ifreq *ifcu_req;
	} ifc_ifcu;
#define	ifc_buf	ifc_ifcu.ifcu_buf	/* buffer address */
#define	ifc_req	ifc_ifcu.ifcu_req	/* array of structures returned */
};

#include <net/if_arp.h>

#ifdef KERNEL
#define	IFAFREE(ifa) \
	if ((ifa)->ifa_refcnt <= 0) \
		ifafree(ifa); \
	else \
		(ifa)->ifa_refcnt--;

struct	ifnet	*ifnet;

void	ether_ifattach __P((struct ifnet *));
void	ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
int	ether_output __P((struct ifnet *,
	   struct mbuf *, struct sockaddr *, struct rtentry *));
char	*ether_sprintf __P((u_char *));

void	if_attach __P((struct ifnet *));
void	if_down __P((struct ifnet *));
void	if_qflush __P((struct ifqueue *));
void	if_slowtimo __P((void *));
void	if_up __P((struct ifnet *));
#ifdef vax
void	ifubareset __P((int));
#endif
int	ifconf __P((int, caddr_t));
void	ifinit __P((void));
int	ifioctl __P((struct socket *, int, caddr_t, struct proc *));
int	ifpromisc __P((struct ifnet *, int));
struct	ifnet *ifunit __P((char *));

struct	ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
struct	ifaddr *ifa_ifwithaf __P((int));
struct	ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
struct	ifaddr *ifa_ifwithnet __P((struct sockaddr *));
struct	ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
					struct sockaddr *));
struct	ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
void	ifafree __P((struct ifaddr *));
void	link_rtrequest __P((int, struct rtentry *, struct sockaddr *));

int	loioctl __P((struct ifnet *, int, caddr_t));
void	loopattach __P((int));
int	looutput __P((struct ifnet *,
	   struct mbuf *, struct sockaddr *, struct rtentry *));
void	lortrequest __P((int, struct rtentry *, struct sockaddr *));
#endif
Commit	Line	Data
cb1c44c2	1	/*
c8dfc989 KB	2	* Copyright (c) 1982, 1986, 1989, 1993
c8dfc989 KB	3	* The Regents of the University of California. All rights reserved.
cb1c44c2	4	*
dbf0c423	5	* %sccs.include.redist.c%
5b519e94	6	*
c8dfc989	7	* @(#)if.h 8.1 (Berkeley) %G%
cb1c44c2	8	*/
665ce890 BJ	9
665ce890 BJ	10	/*
f1b2fa5b BJ	11	* Structures defining a network interface, providing a packet
	12	* transport mechanism (ala level 0 of the PUP protocols).
	13	*
	14	* Each interface accepts output datagrams of a specified maximum
	15	* length, and provides higher level routines with input datagrams
	16	* received from its medium.
	17	*
	18	* Output occurs when the routine if_output is called, with three parameters:
320326b9	19	* (*ifp->if_output)(ifp, m, dst, rt)
ee787340 SL	20	* Here m is the mbuf chain to be sent and dst is the destination address.
	21	* The output routine encapsulates the supplied datagram if necessary,
	22	* and then transmits it on its medium.
f1b2fa5b BJ	23	*
	24	* On input, each interface unwraps the data received by it, and either
	25	* places it on the input queue of a internetwork datagram routine
	26	* and posts the associated software interrupt, or passes the datagram to a raw
	27	* packet input routine.
	28	*
ee787340	29	* Routines exist for locating interfaces by their addresses
f1b2fa5b BJ	30	* or for locating a interface on a certain network, as well as more general
f1b2fa5b BJ	31	* routing and gateway routines maintaining information used to locate
ee787340	32	* interfaces. These routines live in the files if.c and route.c
8a13b737	33	*/
ba56c73e	34	#ifndef _TIME_ /* XXX fast fix for SNMP, going away soon */
ba56c73e KS	35	#include <sys/time.h>
ba56c73e KS	36	#endif
8a13b737	37
7e3bff40 KS	38	#ifdef __STDC__
	39	/*
	40	* Forward structure declarations for function prototypes [sic].
	41	*/
1a30fb87	42	struct mbuf;
6c2dff04 KB	43	struct proc;
	44	struct rtentry;
	45	struct socket;
	46	struct ether_header;
7e3bff40	47	#endif
ec1367f4 KS	48	/*
	49	* Structure describing information about an interface
	50	* which may be of interest to management entities.
	51	*/
8a13b737 BJ	52	/*
8a13b737 BJ	53	* Structure defining a queue for a network interface.
665ce890 BJ	54	*
	55	* (Would like to call this struct ``if'', but C isn't PL/1.)
	56	*/
ba56c73e	57
665ce890	58	struct ifnet {
b454c3ea	59	char if_name; / name, e.g. ``en'' or ``lo'' */
ec1367f4 KS	60	struct ifnet if_next; / all struct ifnets are chained */
	61	struct ifaddr if_addrlist; / linked list of addresses per if */
	62	int if_pcount; /* number of promiscuous listeners */
78cafbd4	63	caddr_t if_bpf; /* packet filter structure */
ec1367f4	64	u_short if_index; /* numeric abbreviation for this if */
665ce890	65	short if_unit; /* sub-unit for lower level driver */
de602274	66	short if_timer; /* time 'til if_watchdog called */
ec1367f4 KS	67	short if_flags; /* up/down, broadcast, etc. */
	68	struct if_data {
	69	/* generic interface information */
ec1367f4 KS	70	u_char ifi_type; /* ethernet, tokenring, etc */
	71	u_char ifi_addrlen; /* media address length */
	72	u_char ifi_hdrlen; /* media header length */
78cafbd4 KS	73	u_long ifi_mtu; /* maximum transmission unit */
	74	u_long ifi_metric; /* routing metric (external only) */
	75	u_long ifi_baudrate; /* linespeed */
ec1367f4	76	/* volatile statistics */
78cafbd4 KS	77	u_long ifi_ipackets; /* packets received on interface */
	78	u_long ifi_ierrors; /* input errors on interface */
	79	u_long ifi_opackets; /* packets sent on interface */
	80	u_long ifi_oerrors; /* output errors on interface */
	81	u_long ifi_collisions; /* collisions on csma interfaces */
	82	u_long ifi_ibytes; /* total number of octets received */
	83	u_long ifi_obytes; /* total number of octets sent */
	84	u_long ifi_imcasts; /* packets received via multicast */
	85	u_long ifi_omcasts; /* packets sent via multicast */
	86	u_long ifi_iqdrops; /* dropped on input, this interface */
	87	u_long ifi_noproto; /* destined for unsupported protocol */
ec1367f4 KS	88	struct timeval ifi_lastchange;/* last updated */
ec1367f4 KS	89	} if_data;
f1b2fa5b	90	/* procedure handles */
320326b9 KS	91	int (if_init) / init routine */
	92	__P((int));
	93	int (if_output) / output routine (enqueue) */
	94	__P((struct ifnet , struct mbuf , struct sockaddr *,
	95	struct rtentry *));
	96	int (if_start) / initiate output routine */
	97	__P((struct ifnet *));
	98	int (if_done) / output complete routine */
	99	__P((struct ifnet )); / (XXX not used; fake prototype) */
	100	int (if_ioctl) / ioctl routine */
	101	__P((struct ifnet *, int, caddr_t));
78cafbd4 KS	102	int (*if_reset)
78cafbd4 KS	103	__P((int)); /* new autoconfig will permit removal */
320326b9 KS	104	int (if_watchdog) / timer routine */
320326b9 KS	105	__P((int));
ec1367f4 KS	106	struct ifqueue {
	107	struct mbuf *ifq_head;
	108	struct mbuf *ifq_tail;
	109	int ifq_len;
	110	int ifq_maxlen;
	111	int ifq_drops;
	112	} if_snd; /* output queue */
665ce890	113	};
ec1367f4 KS	114	#define if_mtu if_data.ifi_mtu
	115	#define if_type if_data.ifi_type
	116	#define if_addrlen if_data.ifi_addrlen
	117	#define if_hdrlen if_data.ifi_hdrlen
	118	#define if_metric if_data.ifi_metric
	119	#define if_baudrate if_data.ifi_baudrate
	120	#define if_ipackets if_data.ifi_ipackets
	121	#define if_ierrors if_data.ifi_ierrors
	122	#define if_opackets if_data.ifi_opackets
	123	#define if_oerrors if_data.ifi_oerrors
	124	#define if_collisions if_data.ifi_collisions
	125	#define if_ibytes if_data.ifi_ibytes
	126	#define if_obytes if_data.ifi_obytes
	127	#define if_imcasts if_data.ifi_imcasts
	128	#define if_omcasts if_data.ifi_omcasts
	129	#define if_iqdrops if_data.ifi_iqdrops
	130	#define if_noproto if_data.ifi_noproto
	131	#define if_lastchange if_data.ifi_lastchange
665ce890	132
ee787340 SL	133	#define IFF_UP 0x1 /* interface is up */
	134	#define IFF_BROADCAST 0x2 /* broadcast address valid */
	135	#define IFF_DEBUG 0x4 /* turn on debugging */
484ee22e	136	#define IFF_LOOPBACK 0x8 /* is a loopback net */
dc39362e	137	#define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */
a62dd253	138	#define IFF_NOTRAILERS 0x20 /* avoid use of trailers */
81889e84	139	#define IFF_RUNNING 0x40 /* resources allocated */
2effa891	140	#define IFF_NOARP 0x80 /* no address resolution protocol */
bbe75d63 MK	141	#define IFF_PROMISC 0x100 /* receive all packets */
bbe75d63 MK	142	#define IFF_ALLMULTI 0x200 /* receive all multicast packets */
38a81509 MK	143	#define IFF_OACTIVE 0x400 /* transmission in progress */
38a81509 MK	144	#define IFF_SIMPLEX 0x800 /* can't hear own transmissions */
38f662d0 KS	145	#define IFF_LINK0 0x1000 /* per link layer defined bit */
	146	#define IFF_LINK1 0x2000 /* per link layer defined bit */
	147	#define IFF_LINK2 0x4000 /* per link layer defined bit */
78cafbd4	148	#define IFF_MULTICAST 0x8000 /* supports multicast */
38a81509	149
484ee22e	150	/* flags set internally only: */
3d424137	151	#define IFF_CANTCHANGE \
78cafbd4	152	(IFF_BROADCAST\|IFF_POINTOPOINT\|IFF_RUNNING\|IFF_OACTIVE\|\
b53bf200	153	IFF_SIMPLEX\|IFF_MULTICAST\|IFF_ALLMULTI)
ee787340	154
f1b2fa5b BJ	155	/*
	156	* Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
	157	* input routines have queues of messages stored on ifqueue structures
	158	* (defined above). Entries are added to and deleted from these structures
	159	* by these macros, which should be called with ipl raised to splimp().
	160	*/
1e977657 BJ	161	#define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
1e977657 BJ	162	#define IF_DROP(ifq) ((ifq)->ifq_drops++)
8a13b737	163	#define IF_ENQUEUE(ifq, m) { \
0428a0b2	164	(m)->m_nextpkt = 0; \
8a13b737	165	if ((ifq)->ifq_tail == 0) \
405c9168	166	(ifq)->ifq_head = m; \
8a13b737	167	else \
0428a0b2	168	(ifq)->ifq_tail->m_nextpkt = m; \
405c9168	169	(ifq)->ifq_tail = m; \
1e977657	170	(ifq)->ifq_len++; \
8a13b737	171	}
e740a894	172	#define IF_PREPEND(ifq, m) { \
0428a0b2	173	(m)->m_nextpkt = (ifq)->ifq_head; \
1dd55890 BJ	174	if ((ifq)->ifq_tail == 0) \
1dd55890 BJ	175	(ifq)->ifq_tail = (m); \
e740a894	176	(ifq)->ifq_head = (m); \
1e977657	177	(ifq)->ifq_len++; \
e740a894	178	}
8a13b737 BJ	179	#define IF_DEQUEUE(ifq, m) { \
	180	(m) = (ifq)->ifq_head; \
	181	if (m) { \
0428a0b2	182	if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
8a13b737	183	(ifq)->ifq_tail = 0; \
0428a0b2	184	(m)->m_nextpkt = 0; \
1e977657	185	(ifq)->ifq_len--; \
8a13b737 BJ	186	} \
8a13b737 BJ	187	}
665ce890	188
1e977657	189	#define IFQ_MAXLEN 50
de602274	190	#define IFNET_SLOWHZ 1 /* granularity is 1 second */
1e977657	191
63de846e MK	192	/*
	193	* The ifaddr structure contains information about one address
	194	* of an interface. They are maintained by the different address families,
	195	* are allocated and attached when an address is set, and are linked
	196	* together so all addresses for an interface can be located.
	197	*/
	198	struct ifaddr {
b72a6efb KS	199	struct sockaddr ifa_addr; / address of interface */
	200	struct sockaddr ifa_dstaddr; / other end of p-to-p link */
	201	#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
	202	struct sockaddr ifa_netmask; / used to determine subnet */
63de846e MK	203	struct ifnet ifa_ifp; / back-pointer to interface */
63de846e MK	204	struct ifaddr ifa_next; / next address for interface */
78cafbd4	205	void (ifa_rtrequest)(); / check or clean routes (+ or -)'d */
8b2d214b	206	u_short ifa_flags; /* mostly rt_flags for cloning */
320326b9	207	short ifa_refcnt; /* extra to malloc for link info */
ec1367f4	208	int ifa_metric; /* cost of going out this interface */
78cafbd4 KS	209	#ifdef notdef
	210	struct rtentry ifa_rt; / XXXX for ROUTETOIF ????? */
	211	#endif
63de846e	212	};
78cafbd4	213	#define IFA_ROUTE RTF_UP /* route installed */
ec1367f4 KS	214
	215	/*
	216	* Message format for use in obtaining information about interfaces
	217	* from getkerninfo and the routing socket
	218	*/
	219	struct if_msghdr {
	220	u_short ifm_msglen; /* to skip over non-understood messages */
	221	u_char ifm_version; /* future binary compatability */
	222	u_char ifm_type; /* message type */
	223	int ifm_addrs; /* like rtm_addrs */
	224	int ifm_flags; /* value of if_flags */
	225	u_short ifm_index; /* index for associated ifp */
	226	struct if_data ifm_data;/* statistics and other data about if */
	227	};
	228
	229	/*
	230	* Message format for use in obtaining information about interface addresses
	231	* from getkerninfo and the routing socket
	232	*/
	233	struct ifa_msghdr {
	234	u_short ifam_msglen; /* to skip over non-understood messages */
	235	u_char ifam_version; /* future binary compatability */
	236	u_char ifam_type; /* message type */
	237	int ifam_addrs; /* like rtm_addrs */
	238	int ifam_flags; /* value of ifa_flags */
	239	u_short ifam_index; /* index for associated ifp */
	240	int ifam_metric; /* value of ifa_metric */
	241	};
	242
0c33c832	243	/*
a62dd253 SL	244	* Interface request structure used for socket
	245	* ioctl's. All interface ioctl's must have parameter
	246	* definitions which begin with ifr_name. The
	247	* remainder may be interface specific.
0c33c832 SL	248	*/
0c33c832 SL	249	struct ifreq {
a62dd253 SL	250	#define IFNAMSIZ 16
a62dd253 SL	251	char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
0c33c832 SL	252	union {
	253	struct sockaddr ifru_addr;
	254	struct sockaddr ifru_dstaddr;
bdef13f6	255	struct sockaddr ifru_broadaddr;
0c33c832	256	short ifru_flags;
484ee22e	257	int ifru_metric;
a62dd253	258	caddr_t ifru_data;
0c33c832 SL	259	} ifr_ifru;
	260	#define ifr_addr ifr_ifru.ifru_addr /* address */
	261	#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */
bdef13f6	262	#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
0c33c832	263	#define ifr_flags ifr_ifru.ifru_flags /* flags */
484ee22e	264	#define ifr_metric ifr_ifru.ifru_metric /* metric */
a62dd253	265	#define ifr_data ifr_ifru.ifru_data /* for use by interface */
0c33c832 SL	266	};
0c33c832 SL	267
b72a6efb KS	268	struct ifaliasreq {
	269	char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
	270	struct sockaddr ifra_addr;
	271	struct sockaddr ifra_broadaddr;
	272	struct sockaddr ifra_mask;
	273	};
	274
0c33c832 SL	275	/*
	276	* Structure used in SIOCGIFCONF request.
	277	* Used to retrieve interface configuration
	278	* for machine (useful for programs which
	279	* must know all networks accessible).
	280	*/
	281	struct ifconf {
	282	int ifc_len; /* size of associated buffer */
	283	union {
	284	caddr_t ifcu_buf;
	285	struct ifreq *ifcu_req;
	286	} ifc_ifcu;
	287	#define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
	288	#define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
	289	};
	290
5548a02f KB	291	#include <net/if_arp.h>
5548a02f KB	292
665ce890	293	#ifdef KERNEL
38f662d0	294	#define IFAFREE(ifa) \
320326b9	295	if ((ifa)->ifa_refcnt <= 0) \
38f662d0 KS	296	ifafree(ifa); \
	297	else \
	298	(ifa)->ifa_refcnt--;
	299
38f662d0	300	struct ifnet *ifnet;
6c2dff04 KB	301
	302	void ether_ifattach __P((struct ifnet *));
	303	void ether_input __P((struct ifnet , struct ether_header , struct mbuf *));
	304	int ether_output __P((struct ifnet *,
	305	struct mbuf , struct sockaddr , struct rtentry *));
	306	char ether_sprintf __P((u_char ));
	307
320326b9	308	void if_attach __P((struct ifnet *));
6c2dff04 KB	309	void if_down __P((struct ifnet *));
	310	void if_qflush __P((struct ifqueue *));
	311	void if_slowtimo __P((void *));
	312	void if_up __P((struct ifnet *));
	313	#ifdef vax
	314	void ifubareset __P((int));
	315	#endif
	316	int ifconf __P((int, caddr_t));
	317	void ifinit __P((void));
	318	int ifioctl __P((struct socket , int, caddr_t, struct proc ));
	319	int ifpromisc __P((struct ifnet *, int));
	320	struct ifnet ifunit __P((char ));
	321
	322	struct ifaddr ifa_ifwithaddr __P((struct sockaddr ));
	323	struct ifaddr *ifa_ifwithaf __P((int));
	324	struct ifaddr ifa_ifwithdstaddr __P((struct sockaddr ));
	325	struct ifaddr ifa_ifwithnet __P((struct sockaddr ));
	326	struct ifaddr ifa_ifwithroute __P((int, struct sockaddr ,
	327	struct sockaddr *));
	328	struct ifaddr ifaof_ifpforaddr __P((struct sockaddr , struct ifnet *));
	329	void ifafree __P((struct ifaddr *));
	330	void link_rtrequest __P((int, struct rtentry , struct sockaddr ));
	331
	332	int loioctl __P((struct ifnet *, int, caddr_t));
	333	void loopattach __P((int));
	334	int looutput __P((struct ifnet *,
	335	struct mbuf , struct sockaddr , struct rtentry *));
	336	void lortrequest __P((int, struct rtentry , struct sockaddr ));
5548a02f	337	#endif