Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /********************************************************************* |
| 2 | * |
| 3 | * Filename: discovery.h |
| 4 | * Version: |
| 5 | * Description: |
| 6 | * Status: Experimental. |
| 7 | * Author: Dag Brattli <dagb@cs.uit.no> |
| 8 | * Created at: Tue Apr 6 16:53:53 1999 |
| 9 | * Modified at: Tue Oct 5 10:05:10 1999 |
| 10 | * Modified by: Dag Brattli <dagb@cs.uit.no> |
| 11 | * |
| 12 | * Copyright (c) 1999 Dag Brattli, All Rights Reserved. |
| 13 | * Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com> |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License as |
| 17 | * published by the Free Software Foundation; either version 2 of |
| 18 | * the License, or (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
Jeff Kirsher | a6227e2 | 2013-12-06 09:13:40 -0800 | [diff] [blame^] | 26 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | * |
| 28 | ********************************************************************/ |
| 29 | |
| 30 | #ifndef DISCOVERY_H |
| 31 | #define DISCOVERY_H |
| 32 | |
| 33 | #include <asm/param.h> |
| 34 | |
| 35 | #include <net/irda/irda.h> |
| 36 | #include <net/irda/irqueue.h> /* irda_queue_t */ |
| 37 | #include <net/irda/irlap_event.h> /* LAP_REASON */ |
| 38 | |
| 39 | #define DISCOVERY_EXPIRE_TIMEOUT (2*sysctl_discovery_timeout*HZ) |
| 40 | #define DISCOVERY_DEFAULT_SLOTS 0 |
| 41 | |
| 42 | /* |
| 43 | * This type is used by the protocols that transmit 16 bits words in |
| 44 | * little endian format. A little endian machine stores MSB of word in |
| 45 | * byte[1] and LSB in byte[0]. A big endian machine stores MSB in byte[0] |
| 46 | * and LSB in byte[1]. |
| 47 | * |
| 48 | * This structure is used in the code for things that are endian neutral |
| 49 | * but that fit in a word so that we can manipulate them efficiently. |
| 50 | * By endian neutral, I mean things that are really an array of bytes, |
| 51 | * and always used as such, for example the hint bits. Jean II |
| 52 | */ |
| 53 | typedef union { |
| 54 | __u16 word; |
| 55 | __u8 byte[2]; |
| 56 | } __u16_host_order; |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /* Types of discovery */ |
| 59 | typedef enum { |
| 60 | DISCOVERY_LOG, /* What's in our discovery log */ |
| 61 | DISCOVERY_ACTIVE, /* Doing our own discovery on the medium */ |
| 62 | DISCOVERY_PASSIVE, /* Peer doing discovery on the medium */ |
| 63 | EXPIRY_TIMEOUT, /* Entry expired due to timeout */ |
| 64 | } DISCOVERY_MODE; |
| 65 | |
| 66 | #define NICKNAME_MAX_LEN 21 |
| 67 | |
| 68 | /* Basic discovery information about a peer */ |
| 69 | typedef struct irda_device_info discinfo_t; /* linux/irda.h */ |
| 70 | |
| 71 | /* |
| 72 | * The DISCOVERY structure is used for both discovery requests and responses |
| 73 | */ |
| 74 | typedef struct discovery_t { |
| 75 | irda_queue_t q; /* Must be first! */ |
| 76 | |
| 77 | discinfo_t data; /* Basic discovery information */ |
Joe Perches | f4ab2f72 | 2007-12-20 13:56:32 -0800 | [diff] [blame] | 78 | int name_len; /* Length of nickname */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | LAP_REASON condition; /* More info about the discovery */ |
| 81 | int gen_addr_bit; /* Need to generate a new device |
| 82 | * address? */ |
| 83 | int nslots; /* Number of slots to use when |
| 84 | * discovering */ |
| 85 | unsigned long timestamp; /* Last time discovered */ |
| 86 | unsigned long firststamp; /* First time discovered */ |
| 87 | } discovery_t; |
| 88 | |
| 89 | void irlmp_add_discovery(hashbin_t *cachelog, discovery_t *discovery); |
| 90 | void irlmp_add_discovery_log(hashbin_t *cachelog, hashbin_t *log); |
| 91 | void irlmp_expire_discoveries(hashbin_t *log, __u32 saddr, int force); |
| 92 | struct irda_device_info *irlmp_copy_discoveries(hashbin_t *log, int *pn, |
| 93 | __u16 mask, int old_entries); |
| 94 | |
| 95 | #endif |