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unrealircd/src/support.c
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/*
* Unreal Internet Relay Chat Daemon, src/support.c
* Copyright (C) 1990, 1991 Armin Gruner
*
* 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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* support.c 2.21 4/13/94 1990, 1991 Armin Gruner; 1992, 1993 Darren Reed */
#include "config.h"
#include "struct.h"
#include "common.h"
#include "sys.h"
#include "version.h"
#include "h.h"
#include "inet.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <limits.h>
#ifdef _WIN32
#include <io.h>
#else
extern uid_t irc_uid;
extern gid_t irc_gid;
#include <sys/socket.h>
#include <string.h>
#include <utime.h>
extern int errno; /* ...seems that errno.h doesn't define this everywhere */
#endif
extern void outofmemory();
#define is_enabled match
char *my_itoa(int i)
{
static char buf[128];
#ifndef _WIN32
ircsnprintf(buf, sizeof(buf), "%d", i);
#else
_itoa_s(i, buf, sizeof(buf), 10);
#endif
return (buf);
}
#ifdef NEED_STRTOKEN
/*
** strtoken.c -- walk through a string of tokens, using a set
** of separators
** argv 9/90
*/
char *strtoken(char **save, char *str, char *fs)
{
char *pos, *tmp;
if (str)
pos = str; /* new string scan */
else
pos = *save; /* keep last position across calls */
while (pos && *pos && index(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 && index(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 /* NEED_STRTOKEN */
#ifdef NEED_STRTOK
/*
** NOT encouraged to use!
*/
char *strtok2(char *str, char *fs)
{
static char *pos;
return strtoken(&pos, str, fs);
}
#endif /* NEED_STRTOK */
#ifdef NEED_STRERROR
/*
** strerror - return an appropriate system error string to a given errno
**
** argv 11/90
*/
char *strerror(int err_no)
{
extern char *sys_errlist[]; /* Sigh... hopefully on all systems */
extern int sys_nerr;
static char buff[40];
char *errp;
errp = (err_no > sys_nerr ? (char *)NULL : sys_errlist[err_no]);
if (errp == (char *)NULL)
{
errp = buff;
(void)ircsnprintf(buff, sizeof(buff), "Unknown Error %d", err_no);
}
return errp;
}
#endif /* NEED_STRERROR */
/*
** inetntoa -- changed name to remove collision possibility and
** so behaviour is gaurunteed to take a pointer arg.
** -avalon 23/11/92
** inet_ntoa -- returned the dotted notation of a given
** internet number (some ULTRIX don't have this)
** argv 11/90).
** inet_ntoa -- its broken on some Ultrix/Dynix too. -avalon
*/
char *inetntoa(char *in)
{
static char buf[16];
u_char *s = (u_char *)in;
int a, b, c, d;
a = (int)*s++;
b = (int)*s++;
c = (int)*s++;
d = (int)*s++;
(void)ircsnprintf(buf, sizeof(buf), "%d.%d.%d.%d", a, b, c, d);
return buf;
}
/*
* inetntop: return the : notation of a given IPv6 internet number.
* make sure the compressed representation (rfc 1884) isn't used.
*/
char *inetntop(int af, const void *in, char *out, size_t the_size)
{
#ifdef IPV6_COMPRESSED
inet_ntop(af, in, out, the_size);
return out;
#else
static char local_dummy[MYDUMMY_SIZE];
inet_ntop(af, in, local_dummy, the_size);
if (strstr(local_dummy, "::"))
{
char cnt = 0, *cp = local_dummy, *op = out;
while (*cp)
{
if (*cp == ':')
cnt += 1;
if (*cp++ == '.')
{
cnt += 1;
break;
}
}
cp = local_dummy;
while (*cp)
{
*op++ = *cp++;
if (*(cp - 1) == ':' && *cp == ':')
{
if ((cp - 1) == local_dummy)
{
op--;
*op++ = '0';
*op++ = ':';
}
*op++ = '0';
while (cnt++ < 7)
{
*op++ = ':';
*op++ = '0';
}
}
}
if (*(op - 1) == ':')
*op++ = '0';
*op = '\0';
Debug((DEBUG_DNS, "Expanding `%s' -> `%s'", local_dummy, out));
}
else
bcopy(local_dummy, out, 64);
return out;
#endif
}
/* Made by Potvin originally, i guess */
time_t atime_exp(char *base, char *ptr)
{
time_t tmp;
char *p, c = *ptr;
p = ptr;
*ptr-- = '\0';
while (ptr-- > base)
if (isalpha(*ptr))
break;
tmp = atoi(ptr + 1);
*p = c;
return tmp;
}
#define Xtract(x, y) if (x) y = atime_exp(xtime, x)
time_t atime(char *xtime)
{
char *d, *h, *m, *s;
time_t D, H, M, S;
int i;
d = h = m = s = NULL;
D = H = M = S = 0;
i = 0;
for (d = xtime; *d; d++)
if (isalpha(*d) && (i != 1))
i = 1;
if (i == 0)
return (atol(xtime));
d = strchr(xtime, 'd');
h = strchr(xtime, 'h');
m = strchr(xtime, 'm');
s = strchr(xtime, 's');
Xtract(d, D);
Xtract(h, H);
Xtract(m, M);
Xtract(s, S);
return ((D * 86400) + (H * 3600) + (M * 60) + S);
}
void iCstrip(char *line)
{
char *c;
if ((c = strchr(line, '\n')))
*c = '\0';
if ((c = strchr(line, '\r')))
*c = '\0';
}
/*
* from ircd-hybrid-7beta14
* (C) respective coders
*/
/**************************************************************
* Original header, taken from mutt...:
* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
* A bombproof version of doprnt (dopr) included.
* Sigh. This sort of thing is always nasty do deal with. Note that
* the version here does not include floating point...
*
* snprintf() is used instead of sprintf() as it does limit checks
* for string length. This covers a nasty loophole.
*
* The other functions are there to prevent NULL pointers from
* causing nast effects.
*
* More Recently:
* Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
* This was ugly. It is still ugly. I opted out of floating point
* numbers, but the formatter understands just about everything
* from the normal C string format, at least as far as I can tell from
* the Solaris 2.5 printf(3S) man page.
*
* Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
* Ok, added some minimal floating point support, which means this
* probably requires libm on most operating systems. Don't yet
* support the exponent (e,E) and sigfig (g,G). Also, fmtint()
* was pretty badly broken, it just wasn't being exercised in ways
* which showed it, so that's been fixed. Also, formated the code
* to mutt conventions, and removed dead code left over from the
* original. Also, there is now a builtin-test, just compile with:
* gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
* and run snprintf for results.
*
* Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
* The PGP code was using unsigned hexadecimal formats.
* Unfortunately, unsigned formats simply didn't work.
*
* Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
* The original code assumed that both snprintf() and vsnprintf() were
* missing. Some systems only have snprintf() but not vsnprintf(), so
* the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
*
**************************************************************/
#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
/* varargs declarations: */
# define HAVE_STDARGS /* let's hope that works everywhere (mj) */
# define VA_LOCAL_DECL va_list ap
# define VA_START(f) va_start(ap, f)
# define VA_SHIFT(v,t) ; /* no-op for ANSI */
# define VA_END va_end(ap)
static void dopr (char *buffer, size_t maxlen, const char *format,
va_list args);
static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
char *value, int flags, int min, int max);
static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
long value, int base, int min, int max, int flags);
static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
long double fvalue, int min, int max, int flags);
static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c );
/*
* dopr(): poor man's version of doprintf
*/
/* format read states */
#define DP_S_DEFAULT 0
#define DP_S_FLAGS 1
#define DP_S_MIN 2
#define DP_S_DOT 3
#define DP_S_MAX 4
#define DP_S_MOD 5
#define DP_S_CONV 6
#define DP_S_DONE 7
/* format flags - Bits */
#define DP_F_MINUS (1 << 0)
#define DP_F_PLUS (1 << 1)
#define DP_F_SPACE (1 << 2)
#define DP_F_NUM (1 << 3)
#define DP_F_ZERO (1 << 4)
#define DP_F_UP (1 << 5)
#define DP_F_UNSIGNED (1 << 6)
/* Conversion Flags */
#define DP_C_SHORT 1
#define DP_C_LONG 2
#define DP_C_LDOUBLE 3
#define char_to_int(p) (p - '0')
#undef MAX
#define MAX(p,q) ((p >= q) ? p : q)
static void dopr (char *buffer, size_t maxlen, const char *format, va_list args)
{
char ch;
long value;
long double fvalue;
char *strvalue;
int min;
int max;
int state;
int flags;
int cflags;
size_t currlen;
state = DP_S_DEFAULT;
currlen = flags = cflags = min = 0;
max = -1;
ch = *format++;
while (state != DP_S_DONE)
{
if ((ch == '\0') || (currlen >= maxlen))
state = DP_S_DONE;
switch(state)
{
case DP_S_DEFAULT:
if (ch == '%')
state = DP_S_FLAGS;
else
dopr_outch (buffer, &currlen, maxlen, ch);
ch = *format++;
break;
case DP_S_FLAGS:
switch (ch)
{
case '-':
flags |= DP_F_MINUS;
ch = *format++;
break;
case '+':
flags |= DP_F_PLUS;
ch = *format++;
break;
case ' ':
flags |= DP_F_SPACE;
ch = *format++;
break;
case '#':
flags |= DP_F_NUM;
ch = *format++;
break;
case '0':
flags |= DP_F_ZERO;
ch = *format++;
break;
default:
state = DP_S_MIN;
break;
}
break;
case DP_S_MIN:
if (isdigit((unsigned char)ch))
{
min = 10*min + char_to_int (ch);
ch = *format++;
}
else if (ch == '*')
{
min = va_arg (args, int);
ch = *format++;
state = DP_S_DOT;
}
else
state = DP_S_DOT;
break;
case DP_S_DOT:
if (ch == '.')
{
state = DP_S_MAX;
ch = *format++;
}
else
state = DP_S_MOD;
break;
case DP_S_MAX:
if (isdigit((unsigned char)ch))
{
if (max < 0)
max = 0;
max = 10*max + char_to_int (ch);
ch = *format++;
}
else if (ch == '*')
{
max = va_arg (args, int);
ch = *format++;
state = DP_S_MOD;
}
else
state = DP_S_MOD;
break;
case DP_S_MOD:
/* Currently, we don't support Long Long, bummer */
switch (ch)
{
case 'h':
cflags = DP_C_SHORT;
ch = *format++;
break;
case 'l':
cflags = DP_C_LONG;
ch = *format++;
break;
case 'L':
cflags = DP_C_LDOUBLE;
ch = *format++;
break;
default:
break;
}
state = DP_S_CONV;
break;
case DP_S_CONV:
switch (ch)
{
case 'd':
case 'i':
if (cflags == DP_C_SHORT)
value = va_arg (args, int);
else if (cflags == DP_C_LONG)
value = va_arg (args, long int);
else
value = va_arg (args, int);
fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
break;
case 'o':
flags |= DP_F_UNSIGNED;
if (cflags == DP_C_SHORT)
value = va_arg (args, int);
else if (cflags == DP_C_LONG)
value = va_arg (args, unsigned long int);
else
value = va_arg (args, unsigned int);
fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
break;
case 'u':
flags |= DP_F_UNSIGNED;
if (cflags == DP_C_SHORT)
value = va_arg (args, int);
else if (cflags == DP_C_LONG)
value = va_arg (args, unsigned long int);
else
value = va_arg (args, unsigned int);
fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
break;
case 'X':
flags |= DP_F_UP;
case 'x':
flags |= DP_F_UNSIGNED;
if (cflags == DP_C_SHORT)
value = va_arg (args, int);
else if (cflags == DP_C_LONG)
value = va_arg (args, unsigned long int);
else
value = va_arg (args, unsigned int);
fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
break;
case 'f':
if (cflags == DP_C_LDOUBLE)
fvalue = va_arg (args, long double);
else
fvalue = va_arg (args, double);
/* um, floating point? */
fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
break;
case 'E':
flags |= DP_F_UP;
case 'e':
if (cflags == DP_C_LDOUBLE)
fvalue = va_arg (args, long double);
else
fvalue = va_arg (args, double);
break;
case 'G':
flags |= DP_F_UP;
case 'g':
if (cflags == DP_C_LDOUBLE)
fvalue = va_arg (args, long double);
else
fvalue = va_arg (args, double);
break;
case 'c':
dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
break;
case 's':
strvalue = va_arg (args, char *);
if (max < 0)
max = maxlen; /* ie, no max */
fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
break;
case 'p':
strvalue = va_arg (args, void *);
fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
break;
case 'n':
if (cflags == DP_C_SHORT)
{
short int *num;
num = va_arg (args, short int *);
*num = currlen;
}
else if (cflags == DP_C_LONG)
{
long int *num;
num = va_arg (args, long int *);
*num = currlen;
}
else
{
int *num;
num = va_arg (args, int *);
*num = currlen;
}
break;
case '%':
dopr_outch (buffer, &currlen, maxlen, ch);
break;
case 'w':
/* not supported yet, treat as next char */
ch = *format++;
break;
default:
/* Unknown, skip */
break;
}
ch = *format++;
state = DP_S_DEFAULT;
flags = cflags = min = 0;
max = -1;
break;
case DP_S_DONE:
break;
default:
/* hmm? */
break; /* some picky compilers need this */
}
}
if (currlen < maxlen - 1)
buffer[currlen] = '\0';
else
buffer[maxlen - 1] = '\0';
}
static void fmtstr (char *buffer, size_t *currlen, size_t maxlen,
char *value, int flags, int min, int max)
{
int padlen, strln; /* amount to pad */
int cnt = 0;
if (value == 0)
{
value = "<NULL>";
}
for (strln = 0; value[strln]; ++strln); /* strlen */
padlen = min - strln;
if (padlen < 0)
padlen = 0;
if (flags & DP_F_MINUS)
padlen = -padlen; /* Left Justify */
while ((padlen > 0) && (cnt < max))
{
dopr_outch (buffer, currlen, maxlen, ' ');
--padlen;
++cnt;
}
while (*value && (cnt < max))
{
dopr_outch (buffer, currlen, maxlen, *value++);
++cnt;
}
while ((padlen < 0) && (cnt < max))
{
dopr_outch (buffer, currlen, maxlen, ' ');
++padlen;
++cnt;
}
}
/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
static void fmtint (char *buffer, size_t *currlen, size_t maxlen,
long value, int base, int min, int max, int flags)
{
int signvalue = 0;
unsigned long uvalue;
char convert[20];
int place = 0;
int spadlen = 0; /* amount to space pad */
int zpadlen = 0; /* amount to zero pad */
int caps = 0;
if (max < 0)
max = 0;
uvalue = value;
if(!(flags & DP_F_UNSIGNED))
{
if( value < 0 ) {
signvalue = '-';
uvalue = -value;
}
else
if (flags & DP_F_PLUS) /* Do a sign (+/i) */
signvalue = '+';
else
if (flags & DP_F_SPACE)
signvalue = ' ';
}
if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
do {
convert[place++] =
(caps? "0123456789ABCDEF":"0123456789abcdef")
[uvalue % (unsigned)base ];
uvalue = (uvalue / (unsigned)base );
} while(uvalue && (place < 20));
if (place == 20) place--;
convert[place] = 0;
zpadlen = max - place;
spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
if (zpadlen < 0) zpadlen = 0;
if (spadlen < 0) spadlen = 0;
if (flags & DP_F_ZERO)
{
zpadlen = MAX(zpadlen, spadlen);
spadlen = 0;
}
if (flags & DP_F_MINUS)
spadlen = -spadlen; /* Left Justifty */
#ifdef DEBUG_SNPRINTF
dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
zpadlen, spadlen, min, max, place));
#endif
/* Spaces */
while (spadlen > 0)
{
dopr_outch (buffer, currlen, maxlen, ' ');
--spadlen;
}
/* Sign */
if (signvalue)
dopr_outch (buffer, currlen, maxlen, signvalue);
/* Zeros */
if (zpadlen > 0)
{
while (zpadlen > 0)
{
dopr_outch (buffer, currlen, maxlen, '0');
--zpadlen;
}
}
/* Digits */
while (place > 0)
dopr_outch (buffer, currlen, maxlen, convert[--place]);
/* Left Justified spaces */
while (spadlen < 0) {
dopr_outch (buffer, currlen, maxlen, ' ');
++spadlen;
}
}
static long double abs_val (long double value)
{
long double result = value;
if (value < 0)
result = -value;
return result;
}
static long double pow10 (int exp)
{
long double result = 1;
while (exp)
{
result *= 10;
exp--;
}
return result;
}
static long round (long double value)
{
long intpart;
intpart = value;
value = value - intpart;
if (value >= 0.5)
intpart++;
return intpart;
}
static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
long double fvalue, int min, int max, int flags)
{
int signvalue = 0;
long double ufvalue;
char iconvert[20];
char fconvert[20];
int iplace = 0;
int fplace = 0;
int padlen = 0; /* amount to pad */
int zpadlen = 0;
int caps = 0;
long intpart;
long fracpart;
/*
* AIX manpage says the default is 0, but Solaris says the default
* is 6, and sprintf on AIX defaults to 6
*/
if (max < 0)
max = 6;
ufvalue = abs_val (fvalue);
if (fvalue < 0)
signvalue = '-';
else
if (flags & DP_F_PLUS) /* Do a sign (+/i) */
signvalue = '+';
else
if (flags & DP_F_SPACE)
signvalue = ' ';
intpart = ufvalue;
/*
* Sorry, we only support 9 digits past the decimal because of our
* conversion method
*/
if (max > 9)
max = 9;
/* We "cheat" by converting the fractional part to integer by
* multiplying by a factor of 10
*/
fracpart = round ((pow10 (max)) * (ufvalue - intpart));
if (fracpart >= pow10 (max))
{
intpart++;
fracpart -= pow10 (max);
}
#ifdef DEBUG_SNPRINTF
dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart));
#endif
/* Convert integer part */
do {
iconvert[iplace++] =
(caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
intpart = (intpart / 10);
} while(intpart && (iplace < 20));
if (iplace == 20) iplace--;
iconvert[iplace] = 0;
/* Convert fractional part */
do {
fconvert[fplace++] =
(caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
fracpart = (fracpart / 10);
} while(fracpart && (fplace < 20));
if (fplace == 20) fplace--;
fconvert[fplace] = 0;
/* -1 for decimal point, another -1 if we are printing a sign */
padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
zpadlen = max - fplace;
if (zpadlen < 0)
zpadlen = 0;
if (padlen < 0)
padlen = 0;
if (flags & DP_F_MINUS)
padlen = -padlen; /* Left Justifty */
if ((flags & DP_F_ZERO) && (padlen > 0))
{
if (signvalue)
{
dopr_outch (buffer, currlen, maxlen, signvalue);
--padlen;
signvalue = 0;
}
while (padlen > 0)
{
dopr_outch (buffer, currlen, maxlen, '0');
--padlen;
}
}
while (padlen > 0)
{
dopr_outch (buffer, currlen, maxlen, ' ');
--padlen;
}
if (signvalue)
dopr_outch (buffer, currlen, maxlen, signvalue);
while (iplace > 0)
dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
/*
* Decimal point. This should probably use locale to find the correct
* char to print out.
*/
dopr_outch (buffer, currlen, maxlen, '.');
while (fplace > 0)
dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
while (zpadlen > 0)
{
dopr_outch (buffer, currlen, maxlen, '0');
--zpadlen;
}
while (padlen < 0)
{
dopr_outch (buffer, currlen, maxlen, ' ');
++padlen;
}
}
static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c)
{
if (*currlen < maxlen)
buffer[(*currlen)++] = c;
}
#endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */
#ifndef HAVE_VSNPRINTF
int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
{
str[0] = 0;
dopr(str, count, fmt, args);
return(strlen(str));
}
#endif /* !HAVE_VSNPRINTF */
#ifndef HAVE_SNPRINTF
/* VARARGS3 */
#ifdef HAVE_STDARGS
int snprintf (char *str,size_t count,const char *fmt,...)
#else
int snprintf (va_alist) va_dcl
#endif
{
#ifndef HAVE_STDARGS
char *str;
size_t count;
char *fmt;
#endif
VA_LOCAL_DECL;
VA_START (fmt);
VA_SHIFT (str, char *);
VA_SHIFT (count, size_t );
VA_SHIFT (fmt, char *);
(void) vsnprintf(str, count, fmt, ap);
VA_END;
return(strlen(str));
}
#ifdef TEST_SNPRINTF
#ifndef LONG_STRING
#define LONG_STRING 1024
#endif
int main (void)
{
char buf1[LONG_STRING];
char buf2[LONG_STRING];
char *fp_fmt[] = {
"%-1.5f",
"%1.5f",
"%123.9f",
"%10.5f",
"% 10.5f",
"%+22.9f",
"%+4.9f",
"%01.3f",
"%4f",
"%3.1f",
"%3.2f",
NULL
};
double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996,
0.9996, 1.996, 4.136, 0};
char *int_fmt[] = {
"%-1.5d",
"%1.5d",
"%123.9d",
"%5.5d",
"%10.5d",
"% 10.5d",
"%+22.33d",
"%01.3d",
"%4d",
NULL
};
long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
int x, y;
int fail = 0;
int num = 0;
printf ("Testing snprintf format codes against system sprintf...\n");
for (x = 0; fp_fmt[x] != NULL ; x++)
for (y = 0; fp_nums[y] != 0 ; y++)
{
snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]);
sprintf (buf2, fp_fmt[x], fp_nums[y]);
if (strcmp (buf1, buf2))
{
printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", /* __SPRINTF_CHECKED__ */
fp_fmt[x], buf1, buf2);
fail++;
}
num++;
}
for (x = 0; int_fmt[x] != NULL ; x++)
for (y = 0; int_nums[y] != 0 ; y++)
{
snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]);
sprintf (buf2, int_fmt[x], int_nums[y]);
if (strcmp (buf1, buf2))
{
printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", /* __SPRINTF_CHECKED__ */
int_fmt[x], buf1, buf2);
fail++;
}
num++;
}
printf ("%d tests failed out of %d.\n", fail, num);
}
#endif /* SNPRINTF_TEST */
#endif /* !HAVE_SNPRINTF */
/*
* Copyright 1996, 1997, 1998, 1999, 2000 Michiel Boland.
* Under the BSD license (without advertising clause)
* From mathopd
*/
char *rfctime(time_t t, char *buf)
{
struct tm *tp;
tp = gmtime(&t);
if (tp == 0) {
return 0;
}
strftime(buf, 31, "%a, %d %b %Y %H:%M:%S GMT", tp);
return buf;
}
time_t rfc2time(char *s)
{
static const int daytab[2][12] = {
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 },
{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 }
};
unsigned sec, min, hour, day, mon, year;
char month[3];
register char c;
register unsigned n;
register char flag;
register char state;
register char isctime;
enum { D_START, D_END, D_MON, D_DAY, D_YEAR, D_HOUR, D_MIN, D_SEC };
sec = 60;
min = 60;
hour = 24;
day = 32;
year = 1969;
isctime = 0;
month[0] = 0;
state = D_START;
n = 0;
flag = 1;
do {
c = *s++;
switch (state) {
case D_START:
if (c == ' ') {
state = D_MON;
isctime = 1;
} else if (c == ',') state = D_DAY;
break;
case D_MON:
if (isalpha(c)) {
if (n < 3) month[n++] = c;
} else {
if (n < 3) return -1;
n = 0;
state = isctime ? D_DAY : D_YEAR;
}
break;
case D_DAY:
if (c == ' ' && flag)
;
else if (isdigit(c)) {
flag = 0;
n = 10 * n + (c - '0');
} else {
day = n;
n = 0;
state = isctime ? D_HOUR : D_MON;
}
break;
case D_YEAR:
if (isdigit(c))
n = 10 * n + (c - '0');
else {
year = n;
n = 0;
state = isctime ? D_END : D_HOUR;
}
break;
case D_HOUR:
if (isdigit(c))
n = 10 * n + (c - '0');
else {
hour = n;
n = 0;
state = D_MIN;
}
break;
case D_MIN:
if (isdigit(c))
n = 10 * n + (c - '0');
else {
min = n;
n = 0;
state = D_SEC;
}
break;
case D_SEC:
if (isdigit(c))
n = 10 * n + (c - '0');
else {
sec = n;
n = 0;
state = isctime ? D_YEAR : D_END;
}
break;
}
} while (state != D_END && c);
switch (month[0]) {
case 'A':
mon = (month[1] == 'p') ? 4 : 8;
break;
case 'D':
mon = 12;
break;
case 'F':
mon = 2;
break;
case 'J':
mon = (month[1] == 'a') ? 1 : ((month[2] == 'l') ? 7 : 6);
break;
case 'M':
mon = (month[2] == 'r') ? 3 : 5;
break;
case 'N':
mon = 11;
break;
case 'O':
mon = 10;
break;
case 'S':
mon = 9;
break;
default:
return -1;
}
if (year <= 100)
year += (year < 70) ? 2000 : 1900;
--mon;
--day;
if (sec >= 60 || min >= 60 || hour >= 60 || day >= 31 || year < 1970)
return -1;
return sec + 60L * (min + 60L * (hour + 24L * (
day + daytab[year % 4 == 0][mon] + 365L * (year - 1970L) + ((year - 1969L) >> 2))));
}
#ifndef HAVE_STRLCPY
/*
* bsd'sh strlcpy().
* The strlcpy() function copies up to size-1 characters from the
* NUL-terminated string src to dst, NUL-terminating the result.
* Return: total length of the string tried to create.
*/
size_t
strlcpy(char *dst, const char *src, size_t size)
{
size_t len = strlen(src);
size_t ret = len;
if (size <= 0)
return 0;
if (len >= size)
len = size - 1;
memcpy(dst, src, len);
dst[len] = 0;
return ret;
}
#endif
#ifndef HAVE_STRLCAT
/*
* bsd'sh strlcat().
* The strlcat() function appends the NUL-terminated string src to the end of
* dst. It will append at most size - strlen(dst) - 1 bytes, NUL-terminating
* the result.
*/
size_t
strlcat(char *dst, const char *src, size_t size)
{
size_t len1 = strlen(dst);
size_t len2 = strlen(src);
size_t ret = len1 + len2;
if (size <= len1)
return size;
if (len1 + len2 >= size)
len2 = size - (len1 + 1);
if (len2 > 0) {
memcpy(dst + len1, src, len2);
dst[len1 + len2] = 0;
}
return ret;
}
#endif
#ifndef HAVE_STRLNCAT
/*
* see strlcat(), but never cat more then n characters.
*/
size_t
strlncat(char *dst, const char *src, size_t size, size_t n)
{
size_t len1 = strlen(dst);
size_t len2 = strlen(src);
size_t ret = len1 + len2;
if (size <= len1)
return size;
if (len2 > n)
len2 = n;
if (len1 + len2 >= size)
len2 = size - (len1 + 1);
if (len2 > 0) {
memcpy(dst + len1, src, len2);
dst[len1 + len2] = 0;
}
return ret;
}
#endif
static const char Base64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static const char Pad64 = '=';
/* (From RFC1521 and draft-ietf-dnssec-secext-03.txt)
The following encoding technique is taken from RFC 1521 by Borenstein
and Freed. It is reproduced here in a slightly edited form for
convenience.
A 65-character subset of US-ASCII is used, enabling 6 bits to be
represented per printable character. (The extra 65th character, "=",
is used to signify a special processing function.)
The encoding process represents 24-bit groups of input bits as output
strings of 4 encoded characters. Proceeding from left to right, a
24-bit input group is formed by concatenating 3 8-bit input groups.
These 24 bits are then treated as 4 concatenated 6-bit groups, each
of which is translated into a single digit in the base64 alphabet.
Each 6-bit group is used as an index into an array of 64 printable
characters. The character referenced by the index is placed in the
output string.
Table 1: The Base64 Alphabet
Value Encoding Value Encoding Value Encoding Value Encoding
0 A 17 R 34 i 51 z
1 B 18 S 35 j 52 0
2 C 19 T 36 k 53 1
3 D 20 U 37 l 54 2
4 E 21 V 38 m 55 3
5 F 22 W 39 n 56 4
6 G 23 X 40 o 57 5
7 H 24 Y 41 p 58 6
8 I 25 Z 42 q 59 7
9 J 26 a 43 r 60 8
10 K 27 b 44 s 61 9
11 L 28 c 45 t 62 +
12 M 29 d 46 u 63 /
13 N 30 e 47 v
14 O 31 f 48 w (pad) =
15 P 32 g 49 x
16 Q 33 h 50 y
Special processing is performed if fewer than 24 bits are available
at the end of the data being encoded. A full encoding quantum is
always completed at the end of a quantity. When fewer than 24 input
bits are available in an input group, zero bits are added (on the
right) to form an integral number of 6-bit groups. Padding at the
end of the data is performed using the '=' character.
Since all base64 input is an integral number of octets, only the
-------------------------------------------------
following cases can arise:
(1) the final quantum of encoding input is an integral
multiple of 24 bits; here, the final unit of encoded
output will be an integral multiple of 4 characters
with no "=" padding,
(2) the final quantum of encoding input is exactly 8 bits;
here, the final unit of encoded output will be two
characters followed by two "=" padding characters, or
(3) the final quantum of encoding input is exactly 16 bits;
here, the final unit of encoded output will be three
characters followed by one "=" padding character.
*/
int b64_encode(unsigned char const *src, size_t srclength, char *target, size_t targsize)
{
size_t datalength = 0;
u_char input[3];
u_char output[4];
size_t i;
while (2 < srclength) {
input[0] = *src++;
input[1] = *src++;
input[2] = *src++;
srclength -= 3;
output[0] = input[0] >> 2;
output[1] = ((input[0] & 0x03) << 4) + (input[1] >> 4);
output[2] = ((input[1] & 0x0f) << 2) + (input[2] >> 6);
output[3] = input[2] & 0x3f;
if (datalength + 4 > targsize)
return (-1);
target[datalength++] = Base64[output[0]];
target[datalength++] = Base64[output[1]];
target[datalength++] = Base64[output[2]];
target[datalength++] = Base64[output[3]];
}
/* Now we worry about padding. */
if (0 != srclength) {
/* Get what's left. */
input[0] = input[1] = input[2] = '\0';
for (i = 0; i < srclength; i++)
input[i] = *src++;
output[0] = input[0] >> 2;
output[1] = ((input[0] & 0x03) << 4) + (input[1] >> 4);
output[2] = ((input[1] & 0x0f) << 2) + (input[2] >> 6);
if (datalength + 4 > targsize)
return (-1);
target[datalength++] = Base64[output[0]];
target[datalength++] = Base64[output[1]];
if (srclength == 1)
target[datalength++] = Pad64;
else
target[datalength++] = Base64[output[2]];
target[datalength++] = Pad64;
}
if (datalength >= targsize)
return (-1);
target[datalength] = '\0'; /* Returned value doesn't count \0. */
return (datalength);
}
/* skips all whitespace anywhere.
converts characters, four at a time, starting at (or after)
src from base - 64 numbers into three 8 bit bytes in the target area.
it returns the number of data bytes stored at the target, or -1 on error.
*/
int b64_decode(char const *src, unsigned char *target, size_t targsize)
{
int tarindex, state, ch;
char *pos;
state = 0;
tarindex = 0;
while ((ch = *src++) != '\0') {
if (isspace(ch)) /* Skip whitespace anywhere. */
continue;
if (ch == Pad64)
break;
pos = strchr(Base64, ch);
if (pos == 0) /* A non-base64 character. */
return (-1);
switch (state) {
case 0:
if (target) {
if ((size_t)tarindex >= targsize)
return (-1);
target[tarindex] = (pos - Base64) << 2;
}
state = 1;
break;
case 1:
if (target) {
if ((size_t)tarindex + 1 >= targsize)
return (-1);
target[tarindex] |= (pos - Base64) >> 4;
target[tarindex+1] = ((pos - Base64) & 0x0f)
<< 4 ;
}
tarindex++;
state = 2;
break;
case 2:
if (target) {
if ((size_t)tarindex + 1 >= targsize)
return (-1);
target[tarindex] |= (pos - Base64) >> 2;
target[tarindex+1] = ((pos - Base64) & 0x03)
<< 6;
}
tarindex++;
state = 3;
break;
case 3:
if (target) {
if ((size_t)tarindex >= targsize)
return (-1);
target[tarindex] |= (pos - Base64);
}
tarindex++;
state = 0;
break;
default:
abort();
}
}
/*
* We are done decoding Base-64 chars. Let's see if we ended
* on a byte boundary, and/or with erroneous trailing characters.
*/
if (ch == Pad64) { /* We got a pad char. */
ch = *src++; /* Skip it, get next. */
switch (state) {
case 0: /* Invalid = in first position */
case 1: /* Invalid = in second position */
return (-1);
case 2: /* Valid, means one byte of info */
/* Skip any number of spaces. */
for ((void)NULL; ch != '\0'; ch = *src++)
if (!isspace(ch))
break;
/* Make sure there is another trailing = sign. */
if (ch != Pad64)
return (-1);
ch = *src++; /* Skip the = */
/* Fall through to "single trailing =" case. */
/* FALLTHROUGH */
case 3: /* Valid, means two bytes of info */
/*
* We know this char is an =. Is there anything but
* whitespace after it?
*/
for ((void)NULL; ch != '\0'; ch = *src++)
if (!isspace(ch))
return (-1);
/*
* Now make sure for cases 2 and 3 that the "extra"
* bits that slopped past the last full byte were
* zeros. If we don't check them, they become a
* subliminal channel.
*/
if (target && target[tarindex] != 0)
return (-1);
}
} else {
/*
* We ended by seeing the end of the string. Make sure we
* have no partial bytes lying around.
*/
if (state != 0)
return (-1);
}
return (tarindex);
}
void *MyMallocEx(size_t size)
{
void *p = MyMalloc(size);
bzero(p, size);
return (p);
}
int file_exists(char* file)
{
FILE *fd;
fd = fopen(file, "r");
if (!fd)
return 0;
fclose(fd);
return 1;
}
/* Returns a unique filename in the specified directory
* using the specified suffix. The returned value will
* be of the form <dir>/<random-hex>.<suffix>
*/
char *unreal_mktemp(const char *dir, const char *suffix)
{
FILE *fd;
unsigned int i;
static char tempbuf[PATH_MAX+1];
for (i = 500; i > 0; i--)
{
snprintf(tempbuf, PATH_MAX, "%s/%X.%s", dir, getrandom32(), suffix);
fd = fopen(tempbuf, "r");
if (!fd)
return tempbuf;
fclose(fd);
}
config_error("Unable to create temporary file in directory '%s': %s",
dir, strerror(errno)); /* eg: permission denied :p */
return NULL;
}
/* Returns the path portion of the given path/file
* in the specified location (must be at least PATH_MAX
* bytes).
*/
char *unreal_getpathname(char *filepath, char *path)
{
char *end = filepath+strlen(filepath);
while (*end != '\\' && *end != '/' && end > filepath)
end--;
if (end == filepath)
path = NULL;
else
{
int size = end-filepath;
if (size >= PATH_MAX)
path = NULL;
else
{
memcpy(path, filepath, size);
path[size] = 0;
}
}
return path;
}
/* Returns the filename portion of the given path
* The original string is not modified
*/
char *unreal_getfilename(char *path)
{
int len = strlen(path);
char *end;
if (!len)
return NULL;
end = path+len-1;
if (*end == '\\' || *end == '/')
return NULL;
while (end > path)
{
if (*end == '\\' || *end == '/')
{
end++;
break;
}
end--;
}
return end;
}
/* Returns the special module tmp name for a given path
* The original string is not modified
*/
char *unreal_getmodfilename(char *path)
{
static char ret[512];
char buf[512];
char *p;
char *name = NULL;
char *directory = NULL;
if (BadPtr(path))
return path;
strlcpy(buf, path, sizeof(buf));
/* Backtrack... */
for (p = buf + strlen(buf); p >= buf; p--)
{
if ((*p == '/') || (*p == '\\'))
{
name = p+1;
*p = '\0';
directory = buf; /* fallback */
for (; p >= buf; p--)
{
if ((*p == '/') || (*p == '\\'))
{
directory = p + 1;
break;
}
}
break;
}
}
if (!name)
name = buf;
if (!directory || !strcmp(directory, "modules"))
snprintf(ret, sizeof(ret), "%s", name);
else
snprintf(ret, sizeof(ret), "%s.%s", directory, name);
return ret;
}
/* Returns a consistent filename for the cache/ directory.
* Returned value will be like: cache/<hash of url>
*/
char *unreal_mkcache(const char *url)
{
static char tempbuf[PATH_MAX+1];
char tmp2[33];
snprintf(tempbuf, PATH_MAX, "%s/%s", CACHEDIR, md5hash(tmp2, url, strlen(url)));
return tempbuf;
}
/* Returns 1 if a cached version of the url exists, otherwise 0. */
int has_cached_version(const char *url)
{
return file_exists(unreal_mkcache(url));
}
/* Used to blow away result of bad copy or cancel file copy */
inline void cancel_copy(int srcfd, int destfd, const char* dest)
{
close(srcfd);
close(destfd);
unlink(dest);
}
/* Copys the contents of the src file to the dest file.
* The dest file will have permissions r-x------
*/
int unreal_copyfile(const char *src, const char *dest)
{
char buf[2048];
time_t mtime;
int srcfd, destfd, len;
mtime = unreal_getfilemodtime(src);
#ifndef _WIN32
srcfd = open(src, O_RDONLY);
#else
srcfd = open(src, _O_RDONLY|_O_BINARY);
#endif
if (srcfd < 0)
{
config_error("Unable to open file '%s': %s", src, strerror(errno));
return 0;
}
#ifndef _WIN32
#if defined(DEFAULT_PERMISSIONS) && (DEFAULT_PERMISSIONS != 0)
destfd = open(dest, O_WRONLY|O_CREAT, DEFAULT_PERMISSIONS);
#else
destfd = open(dest, O_WRONLY|O_CREAT, S_IRUSR | S_IXUSR);
#endif /* DEFAULT_PERMISSIONS */
#else
destfd = open(dest, _O_BINARY|_O_WRONLY|_O_CREAT, _S_IWRITE);
#endif /* _WIN32 */
if (destfd < 0)
{
config_error("Unable to create file '%s': %s", dest, strerror(errno));
close(srcfd);
return 0;
}
while ((len = read(srcfd, buf, 1023)) > 0)
if (write(destfd, buf, len) != len)
{
config_error("Write error to file '%s': %s [not enough free hd space / quota? need several mb's!]",
dest, strerror(ERRNO));
cancel_copy(srcfd,destfd,dest);
return 0;
}
if (len < 0) /* very unusual.. perhaps an I/O error */
{
config_error("Read error from file '%s': %s", src, strerror(errno));
cancel_copy(srcfd,destfd,dest);
return 0;
}
close(srcfd);
close(destfd);
unreal_setfilemodtime(dest, mtime);
#if defined(IRC_USER) && defined(IRC_GROUP)
if (!loop.ircd_booted)
chown(dest, irc_uid, irc_gid);
#endif
return 1;
}
/* Same as unreal_copyfile, but with an option to try hardlinking first */
int unreal_copyfileex(const char *src, const char *dest, int tryhardlink)
{
#ifndef _WIN32
/* Try a hardlink first... */
if (tryhardlink && !link(src, dest))
return 1; /* success */
#endif
return unreal_copyfile(src, dest);
}
void unreal_setfilemodtime(const char *filename, time_t mtime)
{
#ifndef _WIN32
struct utimbuf utb;
utb.actime = utb.modtime = mtime;
utime(filename, &utb);
#else
FILETIME mTime;
LONGLONG llValue;
HANDLE hFile = CreateFile(filename, GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE)
return;
llValue = Int32x32To64(mtime, 10000000) + 116444736000000000;
mTime.dwLowDateTime = (long)llValue;
mTime.dwHighDateTime = llValue >> 32;
SetFileTime(hFile, &mTime, &mTime, &mTime);
CloseHandle(hFile);
#endif
}
time_t unreal_getfilemodtime(const char *filename)
{
#ifndef _WIN32
struct stat sb;
if (stat(filename, &sb))
return 0;
return sb.st_mtime;
#else
/* See how much more fun WinAPI programming is??? */
FILETIME cTime;
SYSTEMTIME sTime, lTime;
ULARGE_INTEGER fullTime;
time_t result;
HANDLE hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE)
return 0;
if (!GetFileTime(hFile, NULL, NULL, &cTime))
return 0;
CloseHandle(hFile);
FileTimeToSystemTime(&cTime, &sTime);
SystemTimeToTzSpecificLocalTime(NULL, &sTime, &lTime);
SystemTimeToFileTime(&sTime, &cTime);
fullTime.LowPart = cTime.dwLowDateTime;
fullTime.HighPart = cTime.dwHighDateTime;
fullTime.QuadPart -= 116444736000000000;
fullTime.QuadPart /= 10000000;
return fullTime.LowPart;
#endif
}
#ifndef AF_INET6
#define AF_INET6 AF_MAX+1 /* just to let this compile */
#endif
char *encode_ip(u_char *ip)
{
static char buf[25];
u_char *cp;
struct in_addr ia; /* For IPv4 */
u_char ia6[16]; /* For IPv6 */
if (!ip)
return "*";
if (strchr(ip, ':'))
{
inet_pton(AF_INET6, ip, ia6);
cp = (u_char *)ia6;
if (cp[0] == 0 && cp[1] == 0 && cp[2] == 0 && cp[3] == 0 && cp[4] == 0
&& cp[5] == 0 && cp[6] == 0 && cp[7] == 0 && cp[8] == 0
&& cp[9] == 0 && cp[10] == 0xff
&& cp[11] == 0xff)
b64_encode((char *)&cp[12], sizeof(struct in_addr), buf, 25);
else
b64_encode((char *)cp, 16, buf, 25);
}
else
{
ia.s_addr = inet_addr(ip);
b64_encode((char *)&ia.s_addr, sizeof(struct in_addr), buf, 25);
}
return buf;
}
char *decode_ip(char *buf)
{
int len = strlen(buf);
char targ[25];
b64_decode(buf, targ, 25);
if (len == 24) /* IPv6 */
{
static char result[64];
return inetntop(AF_INET6, targ, result, 64);
}
else if (len == 8) /* IPv4 */
return inet_ntoa(*(struct in_addr *)targ);
else /* Error?? */
abort();
}
/* IPv6 stuff */
#ifndef IN6ADDRSZ
#define IN6ADDRSZ 16
#endif
#ifndef INT16SZ
#define INT16SZ 2
#endif
#ifndef INADDRSZ
#define INADDRSZ 4
#endif
/* Copyright (c) 1996 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.
*/
#ifndef HAVE_INET_NTOP
/*
* 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 u_char *src, char *dst, size_t size);
static const char *inet_ntop6(const u_char *src, char *dst, size_t size);
/* char *
* inet_ntop(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 *inet_ntop(int af, const void *src, char *dst, size_t size)
{
switch (af) {
case AF_INET:
return (inet_ntop4(src, dst, size));
case AF_INET6:
return (inet_ntop6(src, dst, size));
default:
#ifndef _WIN32
errno = EAFNOSUPPORT;
#else
WSASetLastError(WSAEAFNOSUPPORT);
#endif
return (NULL);
}
/* NOTREACHED */
}
/* const char *
* inet_ntop4(src, dst, size)
* format an IPv4 address, more or less like inet_ntoa()
* return:
* `dst' (as a const)
* notes:
* (1) uses no statics
* (2) takes a u_char* not an in_addr as input
* author:
* Paul Vixie, 1996.
*/
static const char *inet_ntop4(const u_char *src, char *dst, size_t size)
{
static const char fmt[] = "%u.%u.%u.%u";
char tmp[sizeof "255.255.255.255"];
snprintf(tmp, sizeof(tmp), fmt, src[0], src[1], src[2], src[3]);
if ((size_t)strlen(tmp)+1 > size) {
#ifndef _WIN32
errno = ENOSPC;
#else
WSASetLastError(WSAENOBUFS);
#endif
return (NULL);
}
strlcpy(dst, tmp, size);
return (dst);
}
/* const char *
* inet_ntop6(src, dst, size)
* convert IPv6 binary address into presentation (printable) format
* author:
* Paul Vixie, 1996.
*/
static const char *inet_ntop6(const u_char *src, char *dst, size_t 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, cur;
u_int32_t 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++)
words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
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.
*/
if (size < (IN6ADDRSZ / INT16SZ)) return 0;
tp = tmp;
for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
/* Are we inside the best run of 0x00? */
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;
}
snprintf(tp, sizeof(tmp)-strlen(tmp), "%x", words[i]);
tp += strlen(tp);
}
/* 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.
*/
if ((size_t) (tp - tmp) > size) {
#ifndef _WIN32
errno = ENOSPC;
#else
WSASetLastError(WSAENOBUFS);
#endif
return (NULL);
}
strlcpy(dst, tmp, size);
return (dst);
}
#endif /* !HAVE_INET_NTOP */
#ifndef HAVE_INET_PTON
/*
* 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.
*/
/* int
* inet_pton(af, src, dst)
* convert from presentation format (which usually means ASCII printable)
* to network format (which is usually some kind of binary format).
* return:
* 1 if the address was valid for the specified address family
* 0 if the address wasn't valid (`dst' is untouched in this case)
* -1 if some other error occurred (`dst' is untouched in this case, too)
* author:
* Paul Vixie, 1996.
*/
int inet_pton(int af, const char *src, void *dst)
{
switch (af) {
case AF_INET:
return (inet_pton4(src, dst));
case AF_INET6:
return (inet_pton6(src, dst));
default:
#ifndef _WIN32
errno = EAFNOSUPPORT;
#else
WSASetLastError(WSAEAFNOSUPPORT);
#endif
return (-1);
}
/* NOTREACHED */
}
#endif /* !HAVE_INET_PTON */
/* int
* inet_pton4(src, dst)
* like inet_aton() but without all the hexadecimal and shorthand.
* return:
* 1 if `src' is a valid dotted quad, else 0.
* notice:
* does not touch `dst' unless it's returning 1.
* author:
* Paul Vixie, 1996.
*/
int inet_pton4(const char *src, unsigned char *dst)
{
static const char digits[] = "0123456789";
int saw_digit, octets, ch;
unsigned char tmp[INADDRSZ], *tp;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
while ((ch = *src++) != '\0') {
const char *pch;
if ((pch = strchr(digits, ch)) != NULL) {
u_int new = *tp * 10 + (pch - digits);
if (new > 255)
return (0);
*tp = new;
if (! saw_digit) {
if (++octets > 4)
return (0);
saw_digit = 1;
}
} else if (ch == '.' && saw_digit) {
if (octets == 4)
return (0);
*++tp = 0;
saw_digit = 0;
} else
return (0);
}
if (octets < 4)
return (0);
/* bcopy(tmp, dst, INADDRSZ); */
memcpy(dst, tmp, INADDRSZ);
return (1);
}
/* int
* inet_pton6(src, dst)
* convert presentation level address to network order binary form.
* return:
* 1 if `src' is a valid [RFC1884 2.2] address, else 0.
* notice:
* (1) does not touch `dst' unless it's returning 1.
* (2) :: in a full address is silently ignored.
* credit:
* inspired by Mark Andrews.
* author:
* Paul Vixie, 1996.
*/
int inet_pton6(const char *src, unsigned char *dst)
{
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
const char *xdigits, *curtok;
int ch, saw_xdigit;
u_int val;
memset((tp = tmp), 0, IN6ADDRSZ);
endp = tp + IN6ADDRSZ;
colonp = NULL;
/* Leading :: requires some special handling. */
if (*src == ':')
if (*++src != ':')
return (0);
curtok = src;
saw_xdigit = 0;
val = 0;
while ((ch = *src++) != '\0') {
const char *pch;
if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
pch = strchr((xdigits = xdigits_u), ch);
if (pch != NULL) {
val <<= 4;
val |= (pch - xdigits);
if (val > 0xffff)
return (0);
saw_xdigit = 1;
continue;
}
if (ch == ':') {
curtok = src;
if (!saw_xdigit) {
if (colonp)
return (0);
colonp = tp;
continue;
}
if (tp + INT16SZ > endp)
return (0);
*tp++ = (unsigned char) (val >> 8) & 0xff;
*tp++ = (unsigned char) val & 0xff;
saw_xdigit = 0;
val = 0;
continue;
}
if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
inet_pton4(curtok, tp) > 0) {
tp += INADDRSZ;
saw_xdigit = 0;
break; /* '\0' was seen by inet_pton4(). */
}
return (0);
}
if (saw_xdigit) {
if (tp + INT16SZ > endp)
return (0);
*tp++ = (unsigned char) (val >> 8) & 0xff;
*tp++ = (unsigned char) val & 0xff;
}
if (colonp != NULL) {
/*
* Since some memmove()'s erroneously fail to handle
* overlapping regions, we'll do the shift by hand.
*/
const int n = tp - colonp;
int i;
for (i = 1; i <= n; i++) {
endp[- i] = colonp[n - i];
colonp[n - i] = 0;
}
tp = endp;
}
if (tp != endp)
return (0);
/* bcopy(tmp, dst, IN6ADDRSZ); */
memcpy(dst, tmp, IN6ADDRSZ);
return (1);
}
#ifdef _WIN32
/* Microsoft makes things nice and fun for us! */
struct u_WSA_errors {
int error_code;
char *error_string;
};
/* Must be sorted ascending by error code */
struct u_WSA_errors WSAErrors[] = {
{ WSAEINTR, "Interrupted system call" },
{ WSAEBADF, "Bad file number" },
{ WSAEACCES, "Permission denied" },
{ WSAEFAULT, "Bad address" },
{ WSAEINVAL, "Invalid argument" },
{ WSAEMFILE, "Too many open sockets" },
{ WSAEWOULDBLOCK, "Operation would block" },
{ WSAEINPROGRESS, "Operation now in progress" },
{ WSAEALREADY, "Operation already in progress" },
{ WSAENOTSOCK, "Socket operation on non-socket" },
{ WSAEDESTADDRREQ, "Destination address required" },
{ WSAEMSGSIZE, "Message too long" },
{ WSAEPROTOTYPE, "Protocol wrong type for socket" },
{ WSAENOPROTOOPT, "Bad protocol option" },
{ WSAEPROTONOSUPPORT, "Protocol not supported" },
{ WSAESOCKTNOSUPPORT, "Socket type not supported" },
{ WSAEOPNOTSUPP, "Operation not supported on socket" },
{ WSAEPFNOSUPPORT, "Protocol family not supported" },
{ WSAEAFNOSUPPORT, "Address family not supported" },
{ WSAEADDRINUSE, "Address already in use" },
{ WSAEADDRNOTAVAIL, "Can't assign requested address" },
{ WSAENETDOWN, "Network is down" },
{ WSAENETUNREACH, "Network is unreachable" },
{ WSAENETRESET, "Net connection reset" },
{ WSAECONNABORTED, "Software caused connection abort" },
{ WSAECONNRESET, "Connection reset by peer" },
{ WSAENOBUFS, "No buffer space available" },
{ WSAEISCONN, "Socket is already connected" },
{ WSAENOTCONN, "Socket is not connected" },
{ WSAESHUTDOWN, "Can't send after socket shutdown" },
{ WSAETOOMANYREFS, "Too many references, can't splice" },
{ WSAETIMEDOUT, "Connection timed out" },
{ WSAECONNREFUSED, "Connection refused" },
{ WSAELOOP, "Too many levels of symbolic links" },
{ WSAENAMETOOLONG, "File name too long" },
{ WSAEHOSTDOWN, "Host is down" },
{ WSAEHOSTUNREACH, "No route to host" },
{ WSAENOTEMPTY, "Directory not empty" },
{ WSAEPROCLIM, "Too many processes" },
{ WSAEUSERS, "Too many users" },
{ WSAEDQUOT, "Disc quota exceeded" },
{ WSAESTALE, "Stale NFS file handle" },
{ WSAEREMOTE, "Too many levels of remote in path" },
{ WSASYSNOTREADY, "Network subsystem is unavailable" },
{ WSAVERNOTSUPPORTED, "Winsock version not supported" },
{ WSANOTINITIALISED, "Winsock not yet initialized" },
{ WSAHOST_NOT_FOUND, "Host not found" },
{ WSATRY_AGAIN, "Non-authoritative host not found" },
{ WSANO_RECOVERY, "Non-recoverable errors" },
{ WSANO_DATA, "Valid name, no data record of requested type" },
{ WSAEDISCON, "Graceful disconnect in progress" },
{ WSASYSCALLFAILURE, "System call failure" },
{ 0,NULL}
};
char *sock_strerror(int error)
{
static char unkerr[64];
int start = 0;
int stop = sizeof(WSAErrors)/sizeof(WSAErrors[0])-1;
int mid;
if (!error) /* strerror compatibility */
return NULL;
if (error < WSABASEERR) /* Just a regular error code */
return strerror(error);
/* Microsoft decided not to use sequential numbers for the error codes,
* so we can't just use the array index for the code. But, at least
* use a binary search to make it as fast as possible.
*/
while (start <= stop)
{
mid = (start+stop)/2;
if (WSAErrors[mid].error_code > error)
stop = mid-1;
else if (WSAErrors[mid].error_code < error)
start = mid+1;
else
return WSAErrors[mid].error_string;
}
snprintf(unkerr, sizeof(unkerr), "Unknown Error: %d", error);
return unkerr;
}
#endif
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