/*
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.
*/
/*
* This code is borrowed from ircd-hybrid version 7
* -TimeMr14C
*/
#include <errno.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "setup.h"
#include "inet.h"
#include "log.h"
#ifndef INADDRSZ
#define INADDRSZ 4
#endif
#ifdef IPV6
#ifndef IN6ADDRSZ
#define IN6ADDRSZ 16
#endif
#endif
#ifndef INT16SZ
#define INT16SZ 2
#endif
#ifdef IPV6
#define HOSTIPLEN 53
#else
#define HOSTIPLEN 15
#endif
extern const unsigned char ToLowerTab[];
#define ToLower(c) (ToLowerTab[(unsigned char)(c)])
/*
* From: Thomas Helvey <tomh@inxpress.net>
*/
#if 0
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"
};
#endif
/*
* 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
*
* XXX - This does not seem to be used anymore?
* -grifferz
*/
#if 0
static char *inetntoa(char *in)
{
static char buf[16];
register char *bufptr = buf;
register const unsigned char *a = (const unsigned char *) in;
register 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;
}
#endif
/*
* 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.
*/
/*
* 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.
*/
/*
* XXX - Don't seem to be used anymore.
* -grifferz
*/
#if 0
static const char *inet_ntop4(const unsigned char *src, char *dst, unsigned int size);
#endif
#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 u_char* not an in_addr as input
* author:
* Paul Vixie, 1996.
*
* XXX - It seems this isn't used anywhere now?
* -grifferz
*/
#if 0
static const char *inet_ntop4(const unsigned char *src, char *dst, unsigned int size)
{
if (size < 15)
return NULL;
return strcpy(dst, inetntoa((char *) src));
}
#endif
/* 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, cur;
u_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.
*/
if ((tp - tmp) > size)
{
return (NULL);
}
return strcpy(dst, tmp);
}
#endif
#if 0
/*
* This code does not seem to be used anywhere currently?
* -grifferz
*/
/* 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 *) &((struct in6_addr *) src)->s6_addr[12], dst, size));
else
return (inet_ntop6(src, dst, size));
#endif
default:
return (NULL);
}
/* NOTREACHED */
}
#endif
/*
* 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_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.
*/
#ifndef HAVE_INET_PTON
static int inet_pton4(src, dst)
const char *src;
unsigned char *dst;
{
int saw_digit, octets, ch;
unsigned char tmp[INADDRSZ], *tp;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
while ((ch = *src++) != '\0')
{
if (ch >= '0' && ch <= '9')
{
unsigned int new = *tp * 10 + (ch - '0');
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);
memcpy(dst, tmp, INADDRSZ);
return (1);
}
#ifdef IPV6
/* 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.
*/
static int inet_pton6(src, dst)
const char *src;
unsigned char *dst;
{
static const char xdigits[] = "0123456789abcdef";
unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
const char *curtok;
int ch, saw_xdigit;
unsigned int val;
tp = memset(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 = ToLower(*src++)) != '\0')
{
const char *pch;
pch = strchr(xdigits, 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;
}
else if (*src == '\0')
{
return (0);
}
if (tp + INT16SZ > endp)
return (0);
*tp++ = (unsigned char) (val >> 8) & 0xff;
*tp++ = (unsigned char) val & 0xff;
saw_xdigit = 0;
val = 0;
continue;
}
if (*src != '\0' && ch == '.')
{
if (((tp + INADDRSZ) <= endp) && inet_pton4(curtok, tp) > 0)
{
tp += INADDRSZ;
saw_xdigit = 0;
break; /* '\0' was seen by inet_pton4(). */
}
}
else
continue;
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;
if (tp == endp)
return (0);
for (i = 1; i <= n; i++)
{
endp[-i] = colonp[n - i];
colonp[n - i] = 0;
}
tp = endp;
}
if (tp != endp)
return (0);
memcpy(dst, tmp, IN6ADDRSZ);
return (1);
}
#endif /* IPv6 */
int bopm_inet_pton(af, src, dst)
int af;
const char *src;
void *dst;
{
switch (af)
{
case AF_INET:
return (inet_pton4(src, dst));
#ifdef IPV6
case AF_INET6:
/* Somebody might have passed as an IPv4 address this is sick but it works */
if (inet_pton4(src, dst))
{
char tmp[HOSTIPLEN];
sprintf(tmp, "::ffff:%s", src);
return (inet_pton6(tmp, dst));
}
else
return (inet_pton6(src, dst));
#endif /* IPv6 */
default:
return (-1);
}
/* NOTREACHED */
}
#endif
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