1 /*
2 * atheme-services: A collection of minimalist IRC services
3 * base36uid.c: UID management.
4 *
5 * Copyright (c) 2005-2007 Atheme Project (http://www.atheme.org)
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
12 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
13 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
14 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
15 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
16 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
17 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
18 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
19 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
20 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
21 * POSSIBILITY OF SUCH DAMAGE.
22 */
23
24 #include "atheme.h"
25
26 DECLARE_MODULE_V1("protocol/base36uid", true, _modinit, NULL, PACKAGE_STRING, VENDOR_STRING);
27
28 static char new_uid[10]; /* allow for \0 */
29 static unsigned int uindex = 0;
30
base36_uid_init(const char * sid)31 static void base36_uid_init(const char *sid)
32 {
33 unsigned int i;
34 char buf[BUFSIZE];
35
36 if (ircd->uses_p10)
37 {
38 me.numeric = sstrdup(uinttobase64(buf, (uint64_t) atoi(me.numeric), 2));
39 uindex = 5;
40 }
41 else
42 uindex = 9;
43
44
45 memset(new_uid, 0, sizeof(new_uid));
46
47 if (me.numeric != NULL)
48 memcpy(new_uid, me.numeric, strlen(me.numeric));
49 else
50 return;
51
52 for (i = 0; i < strlen(me.numeric); i++)
53 if (new_uid[i] == '\0')
54 new_uid[i] = 'A';
55
56 for (i = strlen(me.numeric); i < uindex; i++)
57 new_uid[i] = 'A';
58 }
59
add_one_to_uid(unsigned int i)60 static void add_one_to_uid(unsigned int i)
61 {
62 if (i != strlen(me.numeric)) /* Not reached server SID portion yet? */
63 {
64 if (new_uid[i] == 'Z')
65 new_uid[i] = '0';
66 else if (new_uid[i] == '9')
67 {
68 new_uid[i] = 'A';
69 add_one_to_uid(i - 1);
70 }
71 else
72 new_uid[i] = new_uid[i] + 1;
73 }
74 else
75 {
76 if (new_uid[i] == 'Z')
77 for (i = strlen(me.numeric); i < 9; i++)
78 new_uid[i] = 'A';
79 else
80 new_uid[i] = new_uid[i] + 1;
81 }
82 }
83
base36_uid_get(void)84 static const char *base36_uid_get(void)
85 {
86 add_one_to_uid(uindex - 1); /* index from 0 */
87 return (new_uid);
88 }
89
90 uid_provider_t base36_gen = {
91 .uid_init = base36_uid_init,
92 .uid_get = base36_uid_get,
93 };
94
_modinit(module_t * m)95 void _modinit(module_t *m)
96 {
97 uid_provider_impl = &base36_gen;
98 }
99
_moddeinit(module_unload_intent_t intent)100 void _moddeinit(module_unload_intent_t intent)
101 {
102 uid_provider_impl = NULL;
103 }
104