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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, 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.
* 4. The name of the Laboratory may not 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 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 */
queue_head_t if_snd_port_list; /* output filter list */
decl_simple_lock_data(,
if_rcv_port_list_lock) /* lock for input filter list */
decl_simple_lock_data(,
if_snd_port_list_lock) /* lock for output 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_ */
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