/*

* Copyright (C) 1996-2001 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.

*/

#include <errno.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <stdio.h>

#include <string.h>

#ifndef NS_INT16SZ

#define NS_INT16SZ 2

#endif

#ifndef NS_INADDRSZ

#define NS_INADDRSZ 4

#endif

#ifndef NS_IN6ADDRSZ

#define NS_IN6ADDRSZ 16

#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.

*/

static int inet_pton4(const char *src, unsigned char *dst);

static int inet_pton6(const char *src, unsigned char *dst);

/* 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.

*/

static int

inet_pton4(const char *src, unsigned char *dst)

{

static const char digits[] = "0123456789";

int saw_digit, octets, ch;

unsigned char tmp[NS_INADDRSZ], *tp;

saw_digit = 0;

octets = 0;

*(tp = tmp) = 0;

while ((ch = *src ) != '\0') {

const char *pch;

if ((pch = strchr(digits, ch)) != NULL) {

unsigned 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);

memcpy(dst, tmp, NS_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.

*/

#ifndef NO_IPV6

static int

inet_pton6(const char *src, unsigned char *dst)

{

static const char xdigits_l[] = "0123456789abcdef",

xdigits_u[] = "0123456789ABCDEF";

unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;

const char *xdigits, *curtok;

int ch, saw_xdigit;

unsigned int val;

memset((tp = tmp), '\0', NS_IN6ADDRSZ);

endp = tp NS_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 NS_INT16SZ > endp)

return (0);

*tp = (unsigned char) (val >> 8) & 0xff;

*tp = (unsigned char) val & 0xff;

saw_xdigit = 0;

val = 0;

continue;

}

if (ch == '.' && ((tp NS_INADDRSZ) <= endp) &&

inet_pton4(curtok, tp) > 0) {

tp = NS_INADDRSZ;

saw_xdigit = 0;

break; /* '\0' was seen by inet_pton4(). */

}

return (0);

}

if (saw_xdigit) {

if (tp NS_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);

memcpy(dst, tmp, NS_IN6ADDRSZ);

return (1);

}

#endif

/* int

* isc_net_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));

#ifndef NO_IPV6

case AF_INET6:

return (inet_pton6(src, dst));

#endif

default:

errno = EAFNOSUPPORT;

return (-1);

}

/* NOTREACHED */

}