BSD 4.4 Lite Kernel Sources

1 files changed, 363 insertions, 0 deletions

diff --git a/sys/net/if.h b/sys/net/if.h
new file mode 100644
index 0000000..c27c4f9
--- /dev/null
+++ b/sys/net/if.h
@@ -0,0 +1,363 @@
+/*
+ * Copyright (c) 1982, 1986, 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)if.h	8.1 (Berkeley) 6/10/93
+ */
+
+/*
+ * 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