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Diffstat (limited to 'device/if_hdr.h')
| -rw-r--r-- | device/if_hdr.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/device/if_hdr.h b/device/if_hdr.h new file mode 100644 index 0000000..64defb7 --- /dev/null +++ b/device/if_hdr.h @@ -0,0 +1,150 @@ +/* + * 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_ |