Initial source

1 files changed, 150 insertions, 0 deletions

diff --git a/device/if_hdr.h b/device/if_hdr.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	Taken from (bsd)net/if.h.  Modified for MACH kernel.
+ */
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *	@(#)if.h	7.3 (Berkeley) 6/27/88
+ */
+
+#ifndef	_IF_HDR_
+#define	_IF_HDR_
+
+#include <kern/lock.h>
+#include <kern/queue.h>
+
+/*
+ * Queue for network output and filter input.
+ */
+struct ifqueue {
+	queue_head_t	ifq_head;	/* queue of io_req_t */
+	int		ifq_len;	/* length of queue */
+	int		ifq_maxlen;	/* maximum length of queue */
+	int		ifq_drops;	/* number of packets dropped
+					   because queue full */
+	decl_simple_lock_data(,
+			ifq_lock)	/* lock for queue and counters */
+};
+
+/*
+ * Header for network interface drivers.
+ */
+struct ifnet {
+	short	if_unit;		/* unit number */
+	short	if_flags;		/* up/down, broadcast, etc. */
+	short	if_timer;		/* time until if_watchdog called */
+	short	if_mtu;			/* maximum transmission unit */
+	short	if_header_size;		/* length of header */
+	short	if_header_format;	/* format of hardware header */
+	short	if_address_size;	/* length of hardware address */
+	short	if_alloc_size;		/* size of read buffer to allocate */
+	char	*if_address;		/* pointer to hardware address */
+	struct ifqueue if_snd;		/* output queue */
+	queue_head_t if_rcv_port_list;	/* input filter list */
+	decl_simple_lock_data(,
+		if_rcv_port_list_lock)	/* lock for filter list */
+/* statistics */
+	int	if_ipackets;		/* packets received */
+	int	if_ierrors;		/* input errors */
+	int	if_opackets;		/* packets sent */
+	int	if_oerrors;		/* output errors */
+	int	if_collisions;		/* collisions on csma interfaces */
+	int	if_rcvdrops;		/* packets received but dropped */
+};
+
+#define	IFF_UP		0x0001		/* interface is up */
+#define	IFF_BROADCAST	0x0002		/* interface can broadcast */
+#define	IFF_DEBUG	0x0004		/* turn on debugging */
+#define	IFF_LOOPBACK	0x0008		/* is a loopback net */
+#define	IFF_POINTOPOINT	0x0010		/* point-to-point link */
+#define	IFF_RUNNING	0x0040		/* resources allocated */
+#define	IFF_NOARP	0x0080		/* no address resolution protocol */
+#define	IFF_PROMISC	0x0100		/* receive all packets */
+#define	IFF_ALLMULTI	0x0200		/* receive all multicast packets */
+#define	IFF_BRIDGE	0x0100		/* support token ring routing field */
+#define	IFF_SNAP	0x0200		/* support extended sap header */
+
+/* internal flags only: */
+#define	IFF_CANTCHANGE	(IFF_BROADCAST | IFF_POINTOPOINT | IFF_RUNNING)
+
+/*
+ * Output queues (ifp->if_snd)
+ * have queues of messages stored on ifqueue structures.  Entries
+ * are added to and deleted from these structures by these macros, which
+ * should be called with ipl raised to splimp().
+ * XXX locking XXX
+ */
+
+#define	IF_QFULL(ifq)		((ifq)->ifq_len >= (ifq)->ifq_maxlen)
+#define	IF_DROP(ifq)		((ifq)->ifq_drops++)
+#define	IF_ENQUEUE(ifq, ior) { \
+	simple_lock(&(ifq)->ifq_lock); \
+	enqueue_tail(&(ifq)->ifq_head, (queue_entry_t)ior); \
+	(ifq)->ifq_len++; \
+	simple_unlock(&(ifq)->ifq_lock); \
+}
+#define	IF_PREPEND(ifq, ior) { \
+	simple_lock(&(ifq)->ifq_lock); \
+	enqueue_head(&(ifq)->ifq_head, (queue_entry_t)ior); \
+	(ifq)->ifq_len++; \
+	simple_unlock(&(ifq)->ifq_lock); \
+}
+
+#define	IF_DEQUEUE(ifq, ior) { \
+	simple_lock(&(ifq)->ifq_lock); \
+	if (((ior) = (io_req_t)dequeue_head(&(ifq)->ifq_head)) != 0) \
+	    (ifq)->ifq_len--; \
+	simple_unlock(&(ifq)->ifq_lock); \
+}
+
+#define	IFQ_MAXLEN	50
+
+#define	IFQ_INIT(ifq) { \
+	queue_init(&(ifq)->ifq_head); \
+	simple_lock_init(&(ifq)->ifq_lock); \
+	(ifq)->ifq_len = 0; \
+	(ifq)->ifq_maxlen = IFQ_MAXLEN; \
+	(ifq)->ifq_drops = 0; \
+}
+
+#define	IFNET_SLOWHZ	1		/* granularity is 1 second */
+
+#endif	_IF_HDR_