trunk/src/irc_string.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  irc_string.c: IRC string functions.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

#include "stdinc.h"
#include "tools.h"
#include "pcre.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "client.h"
#include "list.h"
#include "memory.h"

#ifndef INADDRSZ 
#define INADDRSZ 4
#endif

#ifndef IN6ADDRSZ
#define IN6ADDRSZ 16
#endif

#ifndef INT16SZ
#define INT16SZ 2
#endif


/*
 * myctime - This is like standard ctime()-function, but it zaps away
 *   the newline from the end of that string. Also, it takes
 *   the time value as parameter, instead of pointer to it.
 *   Note that it is necessary to copy the string to alternate
 *   buffer (who knows how ctime() implements it, maybe it statically
 *   has newline there and never 'refreshes' it -- zapping that
 *   might break things in other places...)
 *
 *
 * Thu Nov 24 18:22:48 1986 
 */
const char *
myctime(time_t value)
{
  static char buf[32];
  char *p;

  strcpy(buf, ctime(&value));

  if ((p = strchr(buf, '\n')) != NULL)
    *p = '\0';
  return buf;
}

/*
 * clean_string - clean up a string possibly containing garbage
 *
 * *sigh* Before the kiddies find this new and exciting way of 
 * annoying opers, lets clean up what is sent to local opers
 * -Dianora
 */
char *
clean_string(char* dest, const unsigned char* src, size_t len)
{
  char* d    = dest; 
  assert(0 != dest);
  assert(0 != src);

  if(dest == NULL || src == NULL)
    return NULL;
    
  len -= 3;  /* allow for worst case, '^A\0' */

  while (*src && (len > 0))
  {
    if (*src & 0x80)             /* if high bit is set */
    {
      *d++ = '.';
      --len;
    }
    else if (!IsPrint(*src))       /* if NOT printable */
    {
      *d++ = '^';
      --len;
      *d++ = 0x40 + *src;   /* turn it into a printable */
    }
    else
      *d++ = *src;
    ++src, --len;
  }
  *d = '\0';
  return dest;
}

/*
 * strip_tabs(dst, src, length)
 *
 *   Copies src to dst, while converting all \t (tabs) into spaces.
 */
void
strip_tabs(char *dest, const char *src, size_t len)
{
  char *d = dest;

  /* Sanity check; we don't want anything nasty... */
  assert(dest != NULL);
  assert(src  != NULL);
  assert(len > 0);

  for (; --len && *src; ++src)
    *d++ = *src == '\t' ? ' ' : *src;

  *d = '\0'; /* NUL terminate, thanks and goodbye */
}

/*
 * strtoken - walk through a string of tokens, using a set of separators
 *   argv 9/90
 *
 */
#ifndef HAVE_STRTOK_R

char *
strtoken(char** save, char* str, const char* fs)
{
  char* pos = *save;  /* keep last position across calls */
  char* tmp;

  if (str)
    pos = str;    /* new string scan */

  while (pos && *pos && strchr(fs, *pos) != NULL)
    ++pos;        /* skip leading separators */

  if (!pos || !*pos)
    return (pos = *save = NULL);   /* string contains only sep's */

  tmp = pos;       /* now, keep position of the token */

  while (*pos && strchr(fs, *pos) == NULL)
    ++pos;       /* skip content of the token */

  if (*pos)
    *pos++ = '\0';    /* remove first sep after the token */
  else
    pos = NULL;    /* end of string */

  *save = pos;
  return tmp;
}

#endif /* !HAVE_STRTOK_R */

/* 
 * From: Thomas Helvey <tomh@inxpress.net>
 */
static const char *IpQuadTab[] =
{
    "0",   "1",   "2",   "3",   "4",   "5",   "6",   "7",   "8",   "9",
   "10",  "11",  "12",  "13",  "14",  "15",  "16",  "17",  "18",  "19",
   "20",  "21",  "22",  "23",  "24",  "25",  "26",  "27",  "28",  "29",
   "30",  "31",  "32",  "33",  "34",  "35",  "36",  "37",  "38",  "39",
   "40",  "41",  "42",  "43",  "44",  "45",  "46",  "47",  "48",  "49",
   "50",  "51",  "52",  "53",  "54",  "55",  "56",  "57",  "58",  "59",
   "60",  "61",  "62",  "63",  "64",  "65",  "66",  "67",  "68",  "69",
   "70",  "71",  "72",  "73",  "74",  "75",  "76",  "77",  "78",  "79",
   "80",  "81",  "82",  "83",  "84",  "85",  "86",  "87",  "88",  "89",
   "90",  "91",  "92",  "93",  "94",  "95",  "96",  "97",  "98",  "99",
  "100", "101", "102", "103", "104", "105", "106", "107", "108", "109",
  "110", "111", "112", "113", "114", "115", "116", "117", "118", "119",
  "120", "121", "122", "123", "124", "125", "126", "127", "128", "129",
  "130", "131", "132", "133", "134", "135", "136", "137", "138", "139",
  "140", "141", "142", "143", "144", "145", "146", "147", "148", "149",
  "150", "151", "152", "153", "154", "155", "156", "157", "158", "159",
  "160", "161", "162", "163", "164", "165", "166", "167", "168", "169",
  "170", "171", "172", "173", "174", "175", "176", "177", "178", "179",
  "180", "181", "182", "183", "184", "185", "186", "187", "188", "189",
  "190", "191", "192", "193", "194", "195", "196", "197", "198", "199",
  "200", "201", "202", "203", "204", "205", "206", "207", "208", "209",
  "210", "211", "212", "213", "214", "215", "216", "217", "218", "219",
  "220", "221", "222", "223", "224", "225", "226", "227", "228", "229",
  "230", "231", "232", "233", "234", "235", "236", "237", "238", "239",
  "240", "241", "242", "243", "244", "245", "246", "247", "248", "249",
  "250", "251", "252", "253", "254", "255"
};

/*
 * inetntoa - in_addr to string
 *      changed name to remove collision possibility and
 *      so behaviour is guaranteed to take a pointer arg.
 *      -avalon 23/11/92
 *  inet_ntoa --  returned the dotted notation of a given
 *      internet number
 *      argv 11/90).
 *  inet_ntoa --  its broken on some Ultrix/Dynix too. -avalon
 */
const char *
inetntoa(const char *in)
{
  static char buf[16];
  char *bufptr = buf;
  const unsigned char *a = (const unsigned char *)in;
  const char *n;

  n = IpQuadTab[ *a++ ];
  while (*n)
    *bufptr++ = *n++;
  *bufptr++ = '.';
  n = IpQuadTab[ *a++ ];
  while (*n)
    *bufptr++ = *n++;
  *bufptr++ = '.';
  n = IpQuadTab[ *a++ ];
  while (*n)
    *bufptr++ = *n++;
  *bufptr++ = '.';
  n = IpQuadTab[ *a ];
  while (*n)
    *bufptr++ = *n++;
  *bufptr = '\0';
  return buf;
}

#ifndef HAVE_BASENAME

/* basename()
 *
 * input        - i.e. "/usr/local/ircd/modules/m_whois.so"
 * output       - i.e. "m_whois.so"
 * side effects - this will be overwritten on subsequent calls
 */
char *
basename(char *path)
{
  char *s;

  if ((s = strrchr(path, '/')) == NULL)
    s = path;
  else
    s++;

  return s;
}

#endif /* !HAVE_BASENAME */

/*
 * Copyright (c) 1996-1999 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#define SPRINTF(x) ((size_t)ircsprintf x)

/*
 * WARNING: Don't even consider trying to compile this on a system where
 * sizeof(int) < 4.  sizeof(int) > 4 is fine; all the world's not a VAX.
 */

static const char *inet_ntop4(const unsigned char *src, char *dst, unsigned int size);
#ifdef IPV6
static const char *inet_ntop6(const unsigned char *src, char *dst, unsigned int size);
#endif

/* const char *
 * inet_ntop4(src, dst, size)
 *      format an IPv4 address
 * return:
 *      `dst' (as a const)
 * notes:
 *      (1) uses no statics
 *      (2) takes a unsigned char* not an in_addr as input
 * author:
 *      Paul Vixie, 1996.
 */
static const char *
inet_ntop4(const unsigned char *src, char *dst, unsigned int size)
{
  if (size < 16)
    return NULL;

  return strcpy(dst, inetntoa((const char *)src));
}

/* const char *
 * inet_ntop6(src, dst, size)
 *      convert IPv6 binary address into presentation (printable) format
 * author:
 *      Paul Vixie, 1996.
 */
#ifdef IPV6
static const char *
inet_ntop6(const unsigned char *src, char *dst, unsigned int size)
{
        /*
         * Note that int32_t and int16_t need only be "at least" large enough
         * to contain a value of the specified size.  On some systems, like
         * Crays, there is no such thing as an integer variable with 16 bits.
         * Keep this in mind if you think this function should have been coded
         * to use pointer overlays.  All the world's not a VAX.
         */
        char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
        struct { int base, len; } best = {0,0}, cur = {0,0};
        unsigned int words[IN6ADDRSZ / INT16SZ];
        int i;

        /*
         * Preprocess:
         *      Copy the input (bytewise) array into a wordwise array.
         *      Find the longest run of 0x00's in src[] for :: shorthanding.
         */
        memset(words, '\0', sizeof words);
        for (i = 0; i < IN6ADDRSZ; i += 2)
                words[i / 2] = (src[i] << 8) | src[i + 1];
        best.base = -1;
        cur.base = -1;
        for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
                if (words[i] == 0) {
                        if (cur.base == -1)
                                cur.base = i, cur.len = 1;
                        else
                                cur.len++;
                } else {
                        if (cur.base != -1) {
                                if (best.base == -1 || cur.len > best.len)
                                        best = cur;
                                cur.base = -1;
                        }
                }
        }
        if (cur.base != -1) {
                if (best.base == -1 || cur.len > best.len)
                        best = cur;
        }
        if (best.base != -1 && best.len < 2)
                best.base = -1;

        /*
         * Format the result.
         */
        tp = tmp;
        for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
                /* Are we inside the best run of 0x00's? */
                if (best.base != -1 && i >= best.base &&
                    i < (best.base + best.len)) {
                        if (i == best.base)
                                *tp++ = ':';
                        continue;
                }
                /* Are we following an initial run of 0x00s or any real hex? */
                if (i != 0)
                        *tp++ = ':';
                /* Is this address an encapsulated IPv4? */
                if (i == 6 && best.base == 0 &&
                    (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) {
                        if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp)))
                                return (NULL);
                        tp += strlen(tp);
                        break;
                }
                tp += SPRINTF((tp, "%x", words[i]));
        }
        /* Was it a trailing run of 0x00's? */
        if (best.base != -1 && (best.base + best.len) == 
            (IN6ADDRSZ / INT16SZ))
                *tp++ = ':';
        *tp++ = '\0';

        /*
         * Check for overflow, copy, and we're done.
         */
        
        assert (tp - tmp >= 0);
        
        if ((unsigned int)(tp - tmp) > size) {
                return (NULL);
        }
        return strcpy(dst, tmp);
}
#endif

/* char *
 * inetntop(af, src, dst, size)
 *      convert a network format address to presentation format.
 * return:
 *      pointer to presentation format address (`dst'), or NULL (see errno).
 * author:
 *      Paul Vixie, 1996.
 */
const char *
inetntop(int af, const void *src, char *dst, unsigned int size)
{
  switch (af)
  {
    case AF_INET:
      return inet_ntop4(src, dst, size);
#ifdef IPV6
    case AF_INET6:
      if (IN6_IS_ADDR_V4MAPPED((const struct in6_addr *)src) ||
          IN6_IS_ADDR_V4COMPAT((const struct in6_addr *)src))
        return inet_ntop4((unsigned char *)&((const struct in6_addr *)src)->s6_addr[12], dst, size);
      else 
        return inet_ntop6(src, dst, size);
#endif
    default:
      return NULL;
  }
  /* NOTREACHED */
}

/*
 * strlcat and strlcpy were ripped from openssh 2.5.1p2
 * They had the following Copyright info: 
 *
 *
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright    
 *    notice, this list of conditions and the following disclaimer in the  
 *    documentation and/or other materials provided with the distribution. 
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef HAVE_STRLCAT
size_t
strlcat(char *dst, const char *src, size_t siz)
{
  char *d = dst;
  const char *s = src;
  size_t n = siz, dlen;

  while (n-- != 0 && *d != '\0')
    d++;

  dlen = d - dst;
  n    = siz - dlen;

  if (n == 0)
    return(dlen + strlen(s));

  while (*s != '\0')
  {
    if (n != 1)
    {
      *d++ = *s;
      n--;
    }

    s++;
  }

  *d = '\0';
  return dlen + (s - src); /* count does not include NUL */
}
#endif

#ifndef HAVE_STRLCPY
size_t
strlcpy(char *dst, const char *src, size_t siz)
{
  char *d = dst;
  const char *s = src;
  size_t n = siz;

  /* Copy as many bytes as will fit */
  if (n != 0 && --n != 0)
  {
    do
    {
      if ((*d++ = *s++) == 0)
        break;
    } while (--n != 0);
  }

  /* Not enough room in dst, add NUL and traverse rest of src */
  if (n == 0)
  {
    if (siz != 0)
      *d = '\0'; /* NUL-terminate dst */
    while (*s++)
      ;
  }

  return s - src - 1; /* count does not include NUL */
}
#endif

pcre *
ircd_pcre_compile(const char *pattern, const char **errptr)
{
  int erroroffset = 0;
  int options = PCRE_EXTRA;

  assert(pattern);

  return pcre_compile(pattern, options, errptr, &erroroffset, NULL);
}

int
ircd_pcre_exec(const pcre *code, const char *subject)
{
  assert(code && subject);

  return pcre_exec(code, NULL, subject, strlen(subject), 0, 0, NULL, 0) < 0;
}
Revision:	593
Committed:	Fri May 12 05:47:32 2006 UTC (20 years, 2 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.2/src/irc_string.c*
File size:	14916 byte(s)
Log Message:	- Backported RKLINE fix so the user and host portion of a banmask don't get cut off after 10 and 63 chars, respectively. A split_nuh() rewrite was required for this. - Removed now unused xstrldup() function
#	Content
1	/*
2	* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3	* irc_string.c: IRC string functions.
4	*
5	* Copyright (C) 2002 by the past and present ircd coders, and others.
6	*
7	* This program is free software; you can redistribute it and/or modify
8	* it under the terms of the GNU General Public License as published by
9	* the Free Software Foundation; either version 2 of the License, or
10	* (at your option) any later version.
11	*
12	* This program is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License
18	* along with this program; if not, write to the Free Software
19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20	* USA
21	*
22	* $Id$
23	*/
24
25	#include "stdinc.h"
26	#include "tools.h"
27	#include "pcre.h"
28	#include "irc_string.h"
29	#include "sprintf_irc.h"
30	#include "client.h"
31	#include "list.h"
32	#include "memory.h"
33
34	#ifndef INADDRSZ
35	#define INADDRSZ 4
36	#endif
37
38	#ifndef IN6ADDRSZ
39	#define IN6ADDRSZ 16
40	#endif
41
42	#ifndef INT16SZ
43	#define INT16SZ 2
44	#endif
45
46
47	/*
48	* myctime - This is like standard ctime()-function, but it zaps away
49	* the newline from the end of that string. Also, it takes
50	* the time value as parameter, instead of pointer to it.
51	* Note that it is necessary to copy the string to alternate
52	* buffer (who knows how ctime() implements it, maybe it statically
53	* has newline there and never 'refreshes' it -- zapping that
54	* might break things in other places...)
55	*
56	*
57	* Thu Nov 24 18:22:48 1986
58	*/
59	const char *
60	myctime(time_t value)
61	{
62	static char buf[32];
63	char *p;
64
65	strcpy(buf, ctime(&value));
66
67	if ((p = strchr(buf, '\n')) != NULL)
68	*p = '\0';
69	return buf;
70	}
71
72	/*
73	* clean_string - clean up a string possibly containing garbage
74	*
75	* sigh Before the kiddies find this new and exciting way of
76	* annoying opers, lets clean up what is sent to local opers
77	* -Dianora
78	*/
79	char *
80	clean_string(char* dest, const unsigned char* src, size_t len)
81	{
82	char* d = dest;
83	assert(0 != dest);
84	assert(0 != src);
85
86	if(dest == NULL \|\| src == NULL)
87	return NULL;
88
89	len -= 3; /* allow for worst case, '^A\0' */
90
91	while (*src && (len > 0))
92	{
93	if (src & 0x80) / if high bit is set */
94	{
95	*d++ = '.';
96	--len;
97	}
98	else if (!IsPrint(src)) / if NOT printable */
99	{
100	*d++ = '^';
101	--len;
102	d++ = 0x40 + src; /* turn it into a printable */
103	}
104	else
105	d++ = src;
106	++src, --len;
107	}
108	*d = '\0';
109	return dest;
110	}
111
112	/*
113	* strip_tabs(dst, src, length)
114	*
115	* Copies src to dst, while converting all \t (tabs) into spaces.
116	*/
117	void
118	strip_tabs(char dest, const char src, size_t len)
119	{
120	char *d = dest;
121
122	/* Sanity check; we don't want anything nasty... */
123	assert(dest != NULL);
124	assert(src != NULL);
125	assert(len > 0);
126
127	for (; --len && *src; ++src)
128	d++ = src == '\t' ? ' ' : *src;
129
130	d = '\0'; / NUL terminate, thanks and goodbye */
131	}
132
133	/*
134	* strtoken - walk through a string of tokens, using a set of separators
135	* argv 9/90
136	*
137	*/
138	#ifndef HAVE_STRTOK_R
139
140	char *
141	strtoken(char** save, char* str, const char* fs)
142	{
143	char* pos = save; / keep last position across calls */
144	char* tmp;
145
146	if (str)
147	pos = str; /* new string scan */
148
149	while (pos && pos && strchr(fs, pos) != NULL)
150	++pos; /* skip leading separators */
151
152	if (!pos \|\| !*pos)
153	return (pos = save = NULL); / string contains only sep's */
154
155	tmp = pos; /* now, keep position of the token */
156
157	while (pos && strchr(fs, pos) == NULL)
158	++pos; /* skip content of the token */
159
160	if (*pos)
161	pos++ = '\0'; / remove first sep after the token */
162	else
163	pos = NULL; /* end of string */
164
165	*save = pos;
166	return tmp;
167	}
168
169	#endif /* !HAVE_STRTOK_R */
170
171	/*
172	* From: Thomas Helvey <tomh@inxpress.net>
173	*/
174	static const char *IpQuadTab[] =
175	{
176	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
177	"10", "11", "12", "13", "14", "15", "16", "17", "18", "19",
178	"20", "21", "22", "23", "24", "25", "26", "27", "28", "29",
179	"30", "31", "32", "33", "34", "35", "36", "37", "38", "39",
180	"40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
181	"50", "51", "52", "53", "54", "55", "56", "57", "58", "59",
182	"60", "61", "62", "63", "64", "65", "66", "67", "68", "69",
183	"70", "71", "72", "73", "74", "75", "76", "77", "78", "79",
184	"80", "81", "82", "83", "84", "85", "86", "87", "88", "89",
185	"90", "91", "92", "93", "94", "95", "96", "97", "98", "99",
186	"100", "101", "102", "103", "104", "105", "106", "107", "108", "109",
187	"110", "111", "112", "113", "114", "115", "116", "117", "118", "119",
188	"120", "121", "122", "123", "124", "125", "126", "127", "128", "129",
189	"130", "131", "132", "133", "134", "135", "136", "137", "138", "139",
190	"140", "141", "142", "143", "144", "145", "146", "147", "148", "149",
191	"150", "151", "152", "153", "154", "155", "156", "157", "158", "159",
192	"160", "161", "162", "163", "164", "165", "166", "167", "168", "169",
193	"170", "171", "172", "173", "174", "175", "176", "177", "178", "179",
194	"180", "181", "182", "183", "184", "185", "186", "187", "188", "189",
195	"190", "191", "192", "193", "194", "195", "196", "197", "198", "199",
196	"200", "201", "202", "203", "204", "205", "206", "207", "208", "209",
197	"210", "211", "212", "213", "214", "215", "216", "217", "218", "219",
198	"220", "221", "222", "223", "224", "225", "226", "227", "228", "229",
199	"230", "231", "232", "233", "234", "235", "236", "237", "238", "239",
200	"240", "241", "242", "243", "244", "245", "246", "247", "248", "249",
201	"250", "251", "252", "253", "254", "255"
202	};
203
204	/*
205	* inetntoa - in_addr to string
206	* changed name to remove collision possibility and
207	* so behaviour is guaranteed to take a pointer arg.
208	* -avalon 23/11/92
209	* inet_ntoa -- returned the dotted notation of a given
210	* internet number
211	* argv 11/90).
212	* inet_ntoa -- its broken on some Ultrix/Dynix too. -avalon
213	*/
214	const char *
215	inetntoa(const char *in)
216	{
217	static char buf[16];
218	char *bufptr = buf;
219	const unsigned char a = (const unsigned char )in;
220	const char *n;
221
222	n = IpQuadTab[ *a++ ];
223	while (*n)
224	bufptr++ = n++;
225	*bufptr++ = '.';
226	n = IpQuadTab[ *a++ ];
227	while (*n)
228	bufptr++ = n++;
229	*bufptr++ = '.';
230	n = IpQuadTab[ *a++ ];
231	while (*n)
232	bufptr++ = n++;
233	*bufptr++ = '.';
234	n = IpQuadTab[ *a ];
235	while (*n)
236	bufptr++ = n++;
237	*bufptr = '\0';
238	return buf;
239	}
240
241	#ifndef HAVE_BASENAME
242
243	/* basename()
244	*
245	* input - i.e. "/usr/local/ircd/modules/m_whois.so"
246	* output - i.e. "m_whois.so"
247	* side effects - this will be overwritten on subsequent calls
248	*/
249	char *
250	basename(char *path)
251	{
252	char *s;
253
254	if ((s = strrchr(path, '/')) == NULL)
255	s = path;
256	else
257	s++;
258
259	return s;
260	}
261
262	#endif /* !HAVE_BASENAME */
263
264	/*
265	* Copyright (c) 1996-1999 by Internet Software Consortium.
266	*
267	* Permission to use, copy, modify, and distribute this software for any
268	* purpose with or without fee is hereby granted, provided that the above
269	* copyright notice and this permission notice appear in all copies.
270	*
271	* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
272	* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
273	* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
274	* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
275	* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
276	* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
277	* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
278	* SOFTWARE.
279	*/
280
281	#define SPRINTF(x) ((size_t)ircsprintf x)
282
283	/*
284	* WARNING: Don't even consider trying to compile this on a system where
285	* sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
286	*/
287
288	static const char inet_ntop4(const unsigned char src, char *dst, unsigned int size);
289	#ifdef IPV6
290	static const char inet_ntop6(const unsigned char src, char *dst, unsigned int size);
291	#endif
292
293	/* const char *
294	* inet_ntop4(src, dst, size)
295	* format an IPv4 address
296	* return:
297	* `dst' (as a const)
298	* notes:
299	* (1) uses no statics
300	* (2) takes a unsigned char* not an in_addr as input
301	* author:
302	* Paul Vixie, 1996.
303	*/
304	static const char *
305	inet_ntop4(const unsigned char src, char dst, unsigned int size)
306	{
307	if (size < 16)
308	return NULL;
309
310	return strcpy(dst, inetntoa((const char *)src));
311	}
312
313	/* const char *
314	* inet_ntop6(src, dst, size)
315	* convert IPv6 binary address into presentation (printable) format
316	* author:
317	* Paul Vixie, 1996.
318	*/
319	#ifdef IPV6
320	static const char *
321	inet_ntop6(const unsigned char src, char dst, unsigned int size)
322	{
323	/*
324	* Note that int32_t and int16_t need only be "at least" large enough
325	* to contain a value of the specified size. On some systems, like
326	* Crays, there is no such thing as an integer variable with 16 bits.
327	* Keep this in mind if you think this function should have been coded
328	* to use pointer overlays. All the world's not a VAX.
329	*/
330	char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
331	struct { int base, len; } best = {0,0}, cur = {0,0};
332	unsigned int words[IN6ADDRSZ / INT16SZ];
333	int i;
334
335	/*
336	* Preprocess:
337	* Copy the input (bytewise) array into a wordwise array.
338	* Find the longest run of 0x00's in src[] for :: shorthanding.
339	*/
340	memset(words, '\0', sizeof words);
341	for (i = 0; i < IN6ADDRSZ; i += 2)
342	words[i / 2] = (src[i] << 8) \| src[i + 1];
343	best.base = -1;
344	cur.base = -1;
345	for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
346	if (words[i] == 0) {
347	if (cur.base == -1)
348	cur.base = i, cur.len = 1;
349	else
350	cur.len++;
351	} else {
352	if (cur.base != -1) {
353	if (best.base == -1 \|\| cur.len > best.len)
354	best = cur;
355	cur.base = -1;
356	}
357	}
358	}
359	if (cur.base != -1) {
360	if (best.base == -1 \|\| cur.len > best.len)
361	best = cur;
362	}
363	if (best.base != -1 && best.len < 2)
364	best.base = -1;
365
366	/*
367	* Format the result.
368	*/
369	tp = tmp;
370	for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
371	/* Are we inside the best run of 0x00's? */
372	if (best.base != -1 && i >= best.base &&
373	i < (best.base + best.len)) {
374	if (i == best.base)
375	*tp++ = ':';
376	continue;
377	}
378	/* Are we following an initial run of 0x00s or any real hex? */
379	if (i != 0)
380	*tp++ = ':';
381	/* Is this address an encapsulated IPv4? */
382	if (i == 6 && best.base == 0 &&
383	(best.len == 6 \|\| (best.len == 5 && words[5] == 0xffff))) {
384	if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp)))
385	return (NULL);
386	tp += strlen(tp);
387	break;
388	}
389	tp += SPRINTF((tp, "%x", words[i]));
390	}
391	/* Was it a trailing run of 0x00's? */
392	if (best.base != -1 && (best.base + best.len) ==
393	(IN6ADDRSZ / INT16SZ))
394	*tp++ = ':';
395	*tp++ = '\0';
396
397	/*
398	* Check for overflow, copy, and we're done.
399	*/
400
401	assert (tp - tmp >= 0);
402
403	if ((unsigned int)(tp - tmp) > size) {
404	return (NULL);
405	}
406	return strcpy(dst, tmp);
407	}
408	#endif
409
410	/* char *
411	* inetntop(af, src, dst, size)
412	* convert a network format address to presentation format.
413	* return:
414	* pointer to presentation format address (`dst'), or NULL (see errno).
415	* author:
416	* Paul Vixie, 1996.
417	*/
418	const char *
419	inetntop(int af, const void src, char dst, unsigned int size)
420	{
421	switch (af)
422	{
423	case AF_INET:
424	return inet_ntop4(src, dst, size);
425	#ifdef IPV6
426	case AF_INET6:
427	if (IN6_IS_ADDR_V4MAPPED((const struct in6_addr *)src) \|\|
428	IN6_IS_ADDR_V4COMPAT((const struct in6_addr *)src))
429	return inet_ntop4((unsigned char )&((const struct in6_addr )src)->s6_addr[12], dst, size);
430	else
431	return inet_ntop6(src, dst, size);
432	#endif
433	default:
434	return NULL;
435	}
436	/* NOTREACHED */
437	}
438
439	/*
440	* strlcat and strlcpy were ripped from openssh 2.5.1p2
441	* They had the following Copyright info:
442	*
443	*
444	* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
445	* All rights reserved.
446	*
447	* Redistribution and use in source and binary forms, with or without
448	* modification, are permitted provided that the following conditions
449	* are met:
450	* 1. Redistributions of source code must retain the above copyright
451	* notice, this list of conditions and the following disclaimer.
452	* 2. Redistributions in binary form must reproduce the above copyright
453	* notice, this list of conditions and the following disclaimer in the
454	* documentation and/or other materials provided with the distribution.
455	* 3. The name of the author may not be used to endorse or promote products
456	* derived from this software without specific prior written permission.
457	*
458	* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
459	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
460	* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
461	* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
462	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
463	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
464	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
465	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
466	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
467	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
468	*/
469
470	#ifndef HAVE_STRLCAT
471	size_t
472	strlcat(char dst, const char src, size_t siz)
473	{
474	char *d = dst;
475	const char *s = src;
476	size_t n = siz, dlen;
477
478	while (n-- != 0 && *d != '\0')
479	d++;
480
481	dlen = d - dst;
482	n = siz - dlen;
483
484	if (n == 0)
485	return(dlen + strlen(s));
486
487	while (*s != '\0')
488	{
489	if (n != 1)
490	{
491	d++ = s;
492	n--;
493	}
494
495	s++;
496	}
497
498	*d = '\0';
499	return dlen + (s - src); /* count does not include NUL */
500	}
501	#endif
502
503	#ifndef HAVE_STRLCPY
504	size_t
505	strlcpy(char dst, const char src, size_t siz)
506	{
507	char *d = dst;
508	const char *s = src;
509	size_t n = siz;
510
511	/* Copy as many bytes as will fit */
512	if (n != 0 && --n != 0)
513	{
514	do
515	{
516	if ((d++ = s++) == 0)
517	break;
518	} while (--n != 0);
519	}
520
521	/* Not enough room in dst, add NUL and traverse rest of src */
522	if (n == 0)
523	{
524	if (siz != 0)
525	d = '\0'; / NUL-terminate dst */
526	while (*s++)
527	;
528	}
529
530	return s - src - 1; /* count does not include NUL */
531	}
532	#endif
533
534	pcre *
535	ircd_pcre_compile(const char pattern, const char *errptr)
536	{
537	int erroroffset = 0;
538	int options = PCRE_EXTRA;
539
540	assert(pattern);
541
542	return pcre_compile(pattern, options, errptr, &erroroffset, NULL);
543	}
544
545	int
546	ircd_pcre_exec(const pcre code, const char subject)
547	{
548	assert(code && subject);
549
550	return pcre_exec(code, NULL, subject, strlen(subject), 0, 0, NULL, 0) < 0;
551	}