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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 | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
28 | * MA 02111-1307 USA | |
29 | * | |
30 | ********************************************************************/ | |
31 | ||
32 | #ifndef DISCOVERY_H | |
33 | #define DISCOVERY_H | |
34 | ||
35 | #include <asm/param.h> | |
36 | ||
37 | #include <net/irda/irda.h> | |
38 | #include <net/irda/irqueue.h> /* irda_queue_t */ | |
39 | #include <net/irda/irlap_event.h> /* LAP_REASON */ | |
40 | ||
41 | #define DISCOVERY_EXPIRE_TIMEOUT (2*sysctl_discovery_timeout*HZ) | |
42 | #define DISCOVERY_DEFAULT_SLOTS 0 | |
43 | ||
44 | /* | |
45 | * This type is used by the protocols that transmit 16 bits words in | |
46 | * little endian format. A little endian machine stores MSB of word in | |
47 | * byte[1] and LSB in byte[0]. A big endian machine stores MSB in byte[0] | |
48 | * and LSB in byte[1]. | |
49 | * | |
50 | * This structure is used in the code for things that are endian neutral | |
51 | * but that fit in a word so that we can manipulate them efficiently. | |
52 | * By endian neutral, I mean things that are really an array of bytes, | |
53 | * and always used as such, for example the hint bits. Jean II | |
54 | */ | |
55 | typedef union { | |
56 | __u16 word; | |
57 | __u8 byte[2]; | |
58 | } __u16_host_order; | |
59 | ||
1da177e4 LT |
60 | /* Types of discovery */ |
61 | typedef enum { | |
62 | DISCOVERY_LOG, /* What's in our discovery log */ | |
63 | DISCOVERY_ACTIVE, /* Doing our own discovery on the medium */ | |
64 | DISCOVERY_PASSIVE, /* Peer doing discovery on the medium */ | |
65 | EXPIRY_TIMEOUT, /* Entry expired due to timeout */ | |
66 | } DISCOVERY_MODE; | |
67 | ||
68 | #define NICKNAME_MAX_LEN 21 | |
69 | ||
70 | /* Basic discovery information about a peer */ | |
71 | typedef struct irda_device_info discinfo_t; /* linux/irda.h */ | |
72 | ||
73 | /* | |
74 | * The DISCOVERY structure is used for both discovery requests and responses | |
75 | */ | |
76 | typedef struct discovery_t { | |
77 | irda_queue_t q; /* Must be first! */ | |
78 | ||
79 | discinfo_t data; /* Basic discovery information */ | |
f4ab2f72 | 80 | int name_len; /* Length of nickname */ |
1da177e4 LT |
81 | |
82 | LAP_REASON condition; /* More info about the discovery */ | |
83 | int gen_addr_bit; /* Need to generate a new device | |
84 | * address? */ | |
85 | int nslots; /* Number of slots to use when | |
86 | * discovering */ | |
87 | unsigned long timestamp; /* Last time discovered */ | |
88 | unsigned long firststamp; /* First time discovered */ | |
89 | } discovery_t; | |
90 | ||
91 | void irlmp_add_discovery(hashbin_t *cachelog, discovery_t *discovery); | |
92 | void irlmp_add_discovery_log(hashbin_t *cachelog, hashbin_t *log); | |
93 | void irlmp_expire_discoveries(hashbin_t *log, __u32 saddr, int force); | |
94 | struct irda_device_info *irlmp_copy_discoveries(hashbin_t *log, int *pn, | |
95 | __u16 mask, int old_entries); | |
96 | ||
97 | #endif |