01da2349df
into libkern in order to made it usable by other modules than alias_proxy. Obtained from: Sandvine Incorporated Sponsored by: Sandvine Incorporated MFC: 1 week
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/*-
|
|
* Copyright (c) 2001 Charles Mott <cm@linktel.net>
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/ctype.h>
|
|
#include <sys/limits.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
int
|
|
inet_aton(const char *cp, struct in_addr *addr)
|
|
{
|
|
u_long parts[4];
|
|
in_addr_t val;
|
|
const char *c;
|
|
char *endptr;
|
|
int gotend, n;
|
|
|
|
c = (const char *)cp;
|
|
n = 0;
|
|
|
|
/*
|
|
* Run through the string, grabbing numbers until
|
|
* the end of the string, or some error
|
|
*/
|
|
gotend = 0;
|
|
while (!gotend) {
|
|
unsigned long l;
|
|
|
|
l = strtoul(c, &endptr, 0);
|
|
|
|
if (l == ULONG_MAX || (l == 0 && endptr == c))
|
|
return (0);
|
|
|
|
val = (in_addr_t)l;
|
|
|
|
/*
|
|
* If the whole string is invalid, endptr will equal
|
|
* c.. this way we can make sure someone hasn't
|
|
* gone '.12' or something which would get past
|
|
* the next check.
|
|
*/
|
|
if (endptr == c)
|
|
return (0);
|
|
parts[n] = val;
|
|
c = endptr;
|
|
|
|
/* Check the next character past the previous number's end */
|
|
switch (*c) {
|
|
case '.' :
|
|
|
|
/* Make sure we only do 3 dots .. */
|
|
if (n == 3) /* Whoops. Quit. */
|
|
return (0);
|
|
n++;
|
|
c++;
|
|
break;
|
|
|
|
case '\0':
|
|
gotend = 1;
|
|
break;
|
|
|
|
default:
|
|
if (isspace((unsigned char)*c)) {
|
|
gotend = 1;
|
|
break;
|
|
} else {
|
|
|
|
/* Invalid character, then fail. */
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/* Concoct the address according to the number of parts specified. */
|
|
switch (n) {
|
|
case 0: /* a -- 32 bits */
|
|
|
|
/*
|
|
* Nothing is necessary here. Overflow checking was
|
|
* already done in strtoul().
|
|
*/
|
|
break;
|
|
case 1: /* a.b -- 8.24 bits */
|
|
if (val > 0xffffff || parts[0] > 0xff)
|
|
return (0);
|
|
val |= parts[0] << 24;
|
|
break;
|
|
|
|
case 2: /* a.b.c -- 8.8.16 bits */
|
|
if (val > 0xffff || parts[0] > 0xff || parts[1] > 0xff)
|
|
return (0);
|
|
val |= (parts[0] << 24) | (parts[1] << 16);
|
|
break;
|
|
|
|
case 3: /* a.b.c.d -- 8.8.8.8 bits */
|
|
if (val > 0xff || parts[0] > 0xff || parts[1] > 0xff ||
|
|
parts[2] > 0xff)
|
|
return (0);
|
|
val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
|
|
break;
|
|
}
|
|
|
|
if (addr != NULL)
|
|
addr->s_addr = htonl(val);
|
|
return (1);
|
|
}
|
|
|