/[svn]/ircd-hybrid/branches/8.2.x/src/misc.c
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Contents of /ircd-hybrid/branches/8.2.x/src/misc.c

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Revision 8880 - (show annotations)
Sun Apr 14 16:02:11 2019 UTC (19 months, 2 weeks ago) by michael
File MIME type: text/x-chdr
File size: 4591 byte(s)
- Add address_compare() and make use of it in some places

1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2019 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19 * USA
20 */
21
22 /*! \file s_misc.c
23 * \brief Yet another miscellaneous functions file.
24 * \version $Id$
25 */
26
27 #include "stdinc.h"
28 #include "misc.h"
29 #include "irc_string.h"
30 #include "ircd.h"
31
32
33 const char *
34 date(uintmax_t lclock)
35 {
36 static char buf[80];
37 static uintmax_t lclock_last;
38
39 if (lclock == 0)
40 lclock = CurrentTime;
41
42 if (lclock_last != lclock)
43 {
44 lclock_last = lclock; /* Cache value to avoid repetitive strftime() calls. */
45 strftime(buf, sizeof(buf), "%A %B %-e %Y -- %T %z", localtime((time_t *)&lclock));
46 }
47
48 return buf;
49 }
50
51 const char *
52 date_iso8601(uintmax_t lclock)
53 {
54 static char buf[MAX_DATE_STRING];
55 static uintmax_t lclock_last;
56
57 if (lclock == 0)
58 lclock = CurrentTime;
59
60 if (lclock_last != lclock)
61 {
62 lclock_last = lclock; /* Cache value to avoid repetitive strftime() calls. */
63 strftime(buf, sizeof(buf), "%FT%T%z", localtime((time_t *)&lclock));
64 }
65
66 return buf;
67 }
68
69 /*
70 * myctime - This is like standard ctime()-function, but it zaps away
71 * the newline from the end of that string. Also, it takes
72 * the time value as parameter, instead of pointer to it.
73 * Note that it is necessary to copy the string to alternate
74 * buffer (who knows how ctime() implements it, maybe it statically
75 * has newline there and never 'refreshes' it -- zapping that
76 * might break things in other places...)
77 *
78 *
79 * Thu Nov 24 18:22:48 1986
80 */
81 const char *
82 date_ctime(uintmax_t lclock)
83 {
84 static char buf[MAX_DATE_STRING];
85 static uintmax_t lclock_last;
86
87 if (lclock == 0)
88 lclock = CurrentTime;
89
90 if (lclock_last != lclock)
91 {
92 lclock_last = lclock; /* Cache value to avoid repetitive strftime() calls. */
93 strftime(buf, sizeof(buf), "%a %b %-e %T %Y", localtime((time_t *)&lclock));
94 }
95
96 return buf;
97 }
98
99 const char *
100 time_dissect(uintmax_t duration)
101 {
102 static char buf[32]; /* 32 = sizeof("9999999999999999 days, 23:59:59") */
103 unsigned int days = 0, hours = 0, minutes = 0, seconds = 0;
104
105 while (duration >= 60 * 60 * 24)
106 {
107 duration -= 60 * 60 * 24;
108 ++days;
109 }
110
111 while (duration >= 60 * 60)
112 {
113 duration -= 60 * 60;
114 ++hours;
115 }
116
117 while (duration >= 60)
118 {
119 duration -= 60;
120 ++minutes;
121 }
122
123 seconds = duration;
124
125 snprintf(buf, sizeof(buf), "%u day%s, %02u:%02u:%02u",
126 days, days == 1 ? "" : "s", hours, minutes, seconds);
127 return buf;
128 }
129
130 void
131 binary_to_hex(const unsigned char *bin, char *hex, unsigned int length)
132 {
133 static const char trans[] = "0123456789ABCDEF";
134
135 for (const unsigned char *const end = bin + length; bin < end; ++bin)
136 {
137 *hex++ = trans[*bin >> 4];
138 *hex++ = trans[*bin & 0xf];
139 }
140
141 *hex = '\0';
142 }
143
144 bool
145 address_compare(const void *p1,
146 const void *p2, bool port)
147 {
148 const struct irc_ssaddr *const addr1 = p1;
149 const struct irc_ssaddr *const addr2 = p2;
150
151 if (addr1->ss.ss_family != addr2->ss.ss_family)
152 return false;
153
154 if (addr1->ss.ss_family == AF_INET)
155 {
156 const struct sockaddr_in *const sin1 = (const struct sockaddr_in *)addr1;
157 const struct sockaddr_in *const sin2 = (const struct sockaddr_in *)addr2;
158
159 if (port == true && (sin1->sin_port != sin2->sin_port))
160 return false;
161 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr)
162 return false;
163 return true;
164 }
165 else if (addr1->ss.ss_family == AF_INET6)
166 {
167 const struct sockaddr_in6 *const sin1 = (const struct sockaddr_in6 *)addr1;
168 const struct sockaddr_in6 *const sin2 = (const struct sockaddr_in6 *)addr2;
169
170 if (port == true && (sin1->sin6_port != sin2->sin6_port))
171 return false;
172 if (memcmp(sin1->sin6_addr.s6_addr,
173 sin2->sin6_addr.s6_addr, sizeof(struct in6_addr)))
174 return false;
175 return true;
176 }
177
178 return false;
179 }

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