6b6ac9438f
package does have BXA export approval, but the licensing strings on the dnssafe code are a bit unpleasant. The crypto is easy to restore and bind will run without it - just without full dnssec support. Obtained from: The Internet Software Consortium (www.isc.org)
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/*
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* Copyright (c) 1998,1999 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char rcsid[] = "$Id: inet_cidr_pton.c,v 8.3 1999/01/08 19:23:41 vixie Exp $";
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#endif
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#include "port_before.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <isc/assertions.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "port_after.h"
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#ifdef SPRINTF_CHAR
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# define SPRINTF(x) strlen(sprintf/**/x)
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#else
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# define SPRINTF(x) ((size_t)sprintf x)
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#endif
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static int inet_cidr_pton_ipv4 __P((const char *src, u_char *dst,
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int *bits));
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/*
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* int
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* inet_cidr_pton(af, src, dst, *bits)
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* convert network address from presentation to network format.
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* accepts inet_pton()'s input for this "af" plus trailing "/CIDR".
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* "dst" is assumed large enough for its "af". "bits" is set to the
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* /CIDR prefix length, which can have defaults (like /32 for IPv4).
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* return:
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* -1 if an error occurred (inspect errno; ENOENT means bad format).
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* 0 if successful conversion occurred.
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* note:
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* 192.5.5.1/28 has a nonzero host part, which means it isn't a network
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* as called for by inet_net_pton() but it can be a host address with
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* an included netmask.
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* author:
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* Paul Vixie (ISC), October 1998
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*/
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int
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inet_cidr_pton(int af, const char *src, void *dst, int *bits) {
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switch (af) {
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case AF_INET:
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return (inet_cidr_pton_ipv4(src, dst, bits));
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default:
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errno = EAFNOSUPPORT;
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return (-1);
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}
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}
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static int
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inet_cidr_pton_ipv4(const char *src, u_char *dst, int *pbits) {
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static const char digits[] = "0123456789";
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const u_char *odst = dst;
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int n, ch, tmp, bits;
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size_t size = 4;
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/* Get the mantissa. */
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while (ch = *src++, (isascii(ch) && isdigit(ch))) {
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tmp = 0;
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do {
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n = strchr(digits, ch) - digits;
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INSIST(n >= 0 && n <= 9);
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tmp *= 10;
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tmp += n;
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if (tmp > 255)
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goto enoent;
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} while ((ch = *src++) != '\0' && isascii(ch) && isdigit(ch));
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if (size-- == 0)
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goto emsgsize;
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*dst++ = (u_char) tmp;
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if (ch == '\0' || ch == '/')
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break;
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if (ch != '.')
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goto enoent;
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}
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/* Get the prefix length if any. */
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bits = -1;
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if (ch == '/' && isascii(src[0]) && isdigit(src[0]) && dst > odst) {
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/* CIDR width specifier. Nothing can follow it. */
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ch = *src++; /* Skip over the /. */
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bits = 0;
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do {
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n = strchr(digits, ch) - digits;
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INSIST(n >= 0 && n <= 9);
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bits *= 10;
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bits += n;
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} while ((ch = *src++) != '\0' && isascii(ch) && isdigit(ch));
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if (ch != '\0')
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goto enoent;
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if (bits > 32)
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goto emsgsize;
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}
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/* Firey death and destruction unless we prefetched EOS. */
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if (ch != '\0')
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goto enoent;
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/* Prefix length can default to /32 only if all four octets spec'd. */
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if (bits == -1)
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if (dst - odst == 4)
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bits = 32;
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else
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goto enoent;
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/* If nothing was written to the destination, we found no address. */
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if (dst == odst)
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goto enoent;
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/* If prefix length overspecifies mantissa, life is bad. */
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if ((bits / 8) > (dst - odst))
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goto enoent;
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/* Extend address to four octets. */
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while (size-- > 0)
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*dst++ = 0;
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*pbits = bits;
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return (0);
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enoent:
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errno = ENOENT;
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return (-1);
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emsgsize:
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errno = EMSGSIZE;
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return (-1);
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}
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