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100 lines
3.6 KiB
100 lines
3.6 KiB
/*********************************************************************
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*
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* Filename: discovery.h
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* Version:
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* Description:
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Tue Apr 6 16:53:53 1999
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* Modified at: Tue Oct 5 10:05:10 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
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* Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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#ifndef DISCOVERY_H
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#define DISCOVERY_H
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#include <asm/param.h>
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#include <net/irda/irda.h>
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#include <net/irda/irqueue.h> /* irda_queue_t */
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#include <net/irda/irlap_event.h> /* LAP_REASON */
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#define DISCOVERY_EXPIRE_TIMEOUT (2*sysctl_discovery_timeout*HZ)
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#define DISCOVERY_DEFAULT_SLOTS 0
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/*
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* This type is used by the protocols that transmit 16 bits words in
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* little endian format. A little endian machine stores MSB of word in
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* byte[1] and LSB in byte[0]. A big endian machine stores MSB in byte[0]
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* and LSB in byte[1].
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*
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* This structure is used in the code for things that are endian neutral
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* but that fit in a word so that we can manipulate them efficiently.
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* By endian neutral, I mean things that are really an array of bytes,
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* and always used as such, for example the hint bits. Jean II
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*/
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typedef union {
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__u16 word;
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__u8 byte[2];
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} __u16_host_order;
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/* Same purpose, different application */
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#define u16ho(array) (* ((__u16 *) array))
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/* Types of discovery */
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typedef enum {
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DISCOVERY_LOG, /* What's in our discovery log */
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DISCOVERY_ACTIVE, /* Doing our own discovery on the medium */
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DISCOVERY_PASSIVE, /* Peer doing discovery on the medium */
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EXPIRY_TIMEOUT, /* Entry expired due to timeout */
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} DISCOVERY_MODE;
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#define NICKNAME_MAX_LEN 21
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/* Basic discovery information about a peer */
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typedef struct irda_device_info discinfo_t; /* linux/irda.h */
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/*
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* The DISCOVERY structure is used for both discovery requests and responses
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*/
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typedef struct discovery_t {
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irda_queue_t q; /* Must be first! */
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discinfo_t data; /* Basic discovery information */
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int name_len; /* Length of nickname */
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LAP_REASON condition; /* More info about the discovery */
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int gen_addr_bit; /* Need to generate a new device
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* address? */
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int nslots; /* Number of slots to use when
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* discovering */
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unsigned long timestamp; /* Last time discovered */
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unsigned long firststamp; /* First time discovered */
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} discovery_t;
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void irlmp_add_discovery(hashbin_t *cachelog, discovery_t *discovery);
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void irlmp_add_discovery_log(hashbin_t *cachelog, hashbin_t *log);
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void irlmp_expire_discoveries(hashbin_t *log, __u32 saddr, int force);
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struct irda_device_info *irlmp_copy_discoveries(hashbin_t *log, int *pn,
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__u16 mask, int old_entries);
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#endif
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