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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <ctype.h>
#include <netinet/in.h>
#include <arpa/inet.h>
/*
* Internet network address interpretation routine.
* The library routines call this routine to interpret
* network numbers.
*/
in_addr_t
inet_network(const char *cp)
{
u_char c;
int got_data;
u_int base, dots;
in_addr_t res, val;
res = 0;
dots = 0;
again:
val = 0;
got_data = 0;
if (*cp == '0') {
cp++;
if (*cp == 'x' || *cp == 'X') {
cp++;
base = 16;
} else {
base = 8;
got_data = 1;
}
} else
base = 10;
while ((c = *cp) != '\0') {
if (isdigit(c)) {
if (base == 8 && c > '7')
return (INADDR_NONE);
val = val * base + c - '0';
} else if (base == 16 && isxdigit(c))
val = (val << 4) + 10 - (islower(c) ? 'a' : 'A');
else
break;
if (val > 0xff)
return (INADDR_NONE);
cp++;
got_data = 1;
}
if (!got_data)
return (INADDR_NONE);
if (dots != 0)
res <<= 8;
res |= val;
if (c == '.') {
if (++dots == 4)
return (INADDR_NONE);
cp++;
goto again;
}
if (c != '\0')
return (INADDR_NONE);
return (res);
}
libc_hidden_def(inet_network)
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