2011-05-19 05:00:06 -07:00
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/*
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 1996,1999 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 ISC DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Modifications: Vincent Torri, for the integration in Evil
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* - modification of the name of some functions
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* * modification of the management of the error
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif /* HAVE_CONFIG_H */
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2013-01-10 12:25:44 -08:00
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#include <errno.h>
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2012-02-17 12:48:11 -08:00
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#include <stdio.h>
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2011-05-19 05:00:06 -07:00
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#include <ctype.h>
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#ifndef WIN32_LEAN_AND_MEAN
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# define WIN32_LEAN_AND_MEAN
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#endif
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#include <winsock2.h>
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#undef WIN32_LEAN_AND_MEAN
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2012-02-17 12:48:11 -08:00
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#include "evil_macro.h"
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#include "evil_inet.h"
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2011-05-19 05:00:06 -07:00
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#include "evil_private.h"
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2012-02-17 12:48:11 -08:00
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#define APICHAR char
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#include "evil_print.h"
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2011-05-19 05:00:06 -07:00
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2012-02-20 15:44:56 -08:00
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#ifndef EMSGSIZE
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# define EMSGSIZE WSAEMSGSIZE
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#endif
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#ifndef EAFNOSUPPORT
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# define EAFNOSUPPORT WSAEAFNOSUPPORT
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#endif
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2011-05-19 05:00:06 -07:00
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2012-02-20 15:44:56 -08:00
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#define SPRINTF(x) ((size_t)sprintf x)
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2011-10-05 13:23:24 -07:00
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2011-05-19 05:00:06 -07:00
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#define ERRNO ((int)GetLastError())
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#define SET_ERRNO(x) (SetLastError((DWORD)(x)))
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#define ISDIGIT(x) (isdigit((int) ((unsigned char)x)))
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#define ISXDIGIT(x) (isxdigit((int) ((unsigned char)x)))
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#define ISUPPER(x) (isupper((int) ((unsigned char)x)))
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#define NS_IN6ADDRSZ 16
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#define NS_INT16SZ 2
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#define NS_INADDRSZ sizeof(IN_ADDR)
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struct ares_in6_addr {
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union {
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unsigned char _S6_u8[16];
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} _S6_un;
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};
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const struct ares_in6_addr ares_in6addr_any = { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } };
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/*
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* static int
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* inet_net_pton_ipv4(src, dst, size)
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* convert IPv4 network number from presentation to network format.
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* accepts hex octets, hex strings, decimal octets, and /CIDR.
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* "size" is in bytes and describes "dst".
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* return:
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* number of bits, either imputed classfully or specified with /CIDR,
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* or -1 if some failure occurred (check errno). ENOENT means it was
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* not an IPv4 network specification.
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* note:
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* network byte order assumed. this means 192.5.5.240/28 has
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* 0b11110000 in its fourth octet.
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* note:
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* On Windows we store the error in the thread errno, not
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* in the winsock error code. This is to avoid loosing the
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* actual last winsock error. So use macro ERRNO to fetch the
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* errno this funtion sets when returning (-1), not SOCKERRNO.
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* author:
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* Paul Vixie (ISC), June 1996
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*/
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static int
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inet_net_pton_ipv4(const char *src, unsigned char *dst, size_t size)
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{
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static const char xdigits[] = "0123456789abcdef";
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static const char digits[] = "0123456789";
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int n, ch, tmp = 0, dirty, bits;
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const unsigned char *odst = dst;
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ch = *src++;
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if (ch == '0' && (src[0] == 'x' || src[0] == 'X')
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&& ISXDIGIT(src[1])) {
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/* Hexadecimal: Eat nybble string. */
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if (!size)
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goto emsgsize;
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dirty = 0;
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src++; /* skip x or X. */
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while ((ch = *src++) != '\0' && ISXDIGIT(ch)) {
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if (ISUPPER(ch))
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ch = tolower(ch);
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n = (int)(strchr(xdigits, ch) - xdigits);
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if (dirty == 0)
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tmp = n;
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else
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tmp = (tmp << 4) | n;
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if (++dirty == 2) {
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if (!size--)
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goto emsgsize;
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*dst++ = (unsigned char) tmp;
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dirty = 0;
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}
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}
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if (dirty) { /* Odd trailing nybble? */
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if (!size--)
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goto emsgsize;
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*dst++ = (unsigned char) (tmp << 4);
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}
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} else if (ISDIGIT(ch)) {
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/* Decimal: eat dotted digit string. */
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for (;;) {
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tmp = 0;
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do {
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n = (int)(strchr(digits, ch) - digits);
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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' &&
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ISDIGIT(ch));
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if (!size--)
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goto emsgsize;
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*dst++ = (unsigned 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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ch = *src++;
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if (!ISDIGIT(ch))
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goto enoent;
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}
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} else
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goto enoent;
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bits = -1;
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if (ch == '/' &&
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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 = (int)(strchr(digits, ch) - digits);
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bits *= 10;
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bits += n;
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} while ((ch = *src++) != '\0' && 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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/* 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 no CIDR spec was given, infer width from net class. */
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if (bits == -1) {
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if (*odst >= 240) /* Class E */
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bits = 32;
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else if (*odst >= 224) /* Class D */
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bits = 8;
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else if (*odst >= 192) /* Class C */
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bits = 24;
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else if (*odst >= 128) /* Class B */
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bits = 16;
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else /* Class A */
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bits = 8;
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/* If imputed mask is narrower than specified octets, widen. */
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if (bits < ((dst - odst) * 8))
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bits = (int)(dst - odst) * 8;
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/*
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* If there are no additional bits specified for a class D
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* address adjust bits to 4.
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*/
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if (bits == 8 && *odst == 224)
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bits = 4;
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}
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/* Extend network to cover the actual mask. */
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while (bits > ((dst - odst) * 8)) {
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if (!size--)
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goto emsgsize;
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*dst++ = '\0';
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}
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return (bits);
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enoent:
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SET_ERRNO(ENOENT);
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return (-1);
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emsgsize:
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SET_ERRNO(EMSGSIZE);
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return (-1);
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}
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static int
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getbits(const char *src, int *bitsp)
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{
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static const char digits[] = "0123456789";
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int n;
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int val;
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char ch;
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val = 0;
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n = 0;
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while ((ch = *src++) != '\0') {
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const char *pch;
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pch = strchr(digits, ch);
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if (pch != NULL) {
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if (n++ != 0 && val == 0) /* no leading zeros */
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return (0);
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val *= 10;
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val += (pch - digits);
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if (val > 128) /* range */
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return (0);
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continue;
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}
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return (0);
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}
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if (n == 0)
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return (0);
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*bitsp = val;
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return (1);
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}
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static int
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getv4(const char *src, unsigned char *dst, int *bitsp)
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{
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static const char digits[] = "0123456789";
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unsigned char *odst = dst;
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int n;
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unsigned int val;
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char ch;
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val = 0;
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n = 0;
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while ((ch = *src++) != '\0') {
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const char *pch;
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pch = strchr(digits, ch);
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if (pch != NULL) {
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if (n++ != 0 && val == 0) /* no leading zeros */
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return (0);
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val *= 10;
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val += (pch - digits);
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if (val > 255) /* range */
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return (0);
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continue;
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}
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if (ch == '.' || ch == '/') {
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if (dst - odst > 3) /* too many octets? */
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return (0);
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*dst++ = (unsigned char)val;
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if (ch == '/')
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return (getbits(src, bitsp));
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val = 0;
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n = 0;
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continue;
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}
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return (0);
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}
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if (n == 0)
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return (0);
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if (dst - odst > 3) /* too many octets? */
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return (0);
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*dst++ = (unsigned char)val;
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return (1);
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}
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static int
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inet_net_pton_ipv6(const char *src, unsigned char *dst, size_t size)
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{
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static const char xdigits_l[] = "0123456789abcdef",
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xdigits_u[] = "0123456789ABCDEF";
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unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
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const char *xdigits, *curtok;
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int ch, saw_xdigit;
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unsigned int val;
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int digits;
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int bits;
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size_t bytes;
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int words;
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int ipv4;
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memset((tp = tmp), '\0', NS_IN6ADDRSZ);
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endp = tp + NS_IN6ADDRSZ;
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colonp = NULL;
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/* Leading :: requires some special handling. */
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if (*src == ':')
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if (*++src != ':')
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goto enoent;
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curtok = src;
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saw_xdigit = 0;
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val = 0;
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digits = 0;
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bits = -1;
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ipv4 = 0;
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while ((ch = *src++) != '\0') {
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const char *pch;
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|
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if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
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|
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pch = strchr((xdigits = xdigits_u), ch);
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|
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if (pch != NULL) {
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|
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val <<= 4;
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|
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val |= (pch - xdigits);
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|
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if (++digits > 4)
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goto enoent;
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|
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saw_xdigit = 1;
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|
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continue;
|
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|
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}
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|
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if (ch == ':') {
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|
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curtok = src;
|
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|
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if (!saw_xdigit) {
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|
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if (colonp)
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goto enoent;
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colonp = tp;
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continue;
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} else if (*src == '\0')
|
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|
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goto enoent;
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|
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if (tp + NS_INT16SZ > endp)
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|
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return (0);
|
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|
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*tp++ = (unsigned char)((val >> 8) & 0xff);
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|
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*tp++ = (unsigned char)(val & 0xff);
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|
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saw_xdigit = 0;
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digits = 0;
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val = 0;
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|
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continue;
|
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|
|
}
|
|
|
|
if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
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|
|
getv4(curtok, tp, &bits) > 0) {
|
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|
|
tp += NS_INADDRSZ;
|
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|
|
saw_xdigit = 0;
|
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|
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ipv4 = 1;
|
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|
|
break; /* '\0' was seen by inet_pton4(). */
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|
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}
|
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|
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if (ch == '/' && getbits(src, &bits) > 0)
|
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|
|
break;
|
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|
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goto enoent;
|
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}
|
|
|
|
if (saw_xdigit) {
|
|
|
|
if (tp + NS_INT16SZ > endp)
|
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|
|
goto enoent;
|
|
|
|
*tp++ = (unsigned char)((val >> 8) & 0xff);
|
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|
|
*tp++ = (unsigned char)(val & 0xff);
|
|
|
|
}
|
|
|
|
if (bits == -1)
|
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|
|
bits = 128;
|
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|
|
|
|
|
|
words = (bits + 15) / 16;
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|
|
if (words < 2)
|
|
|
|
words = 2;
|
|
|
|
if (ipv4)
|
|
|
|
words = 8;
|
|
|
|
endp = tmp + 2 * words;
|
|
|
|
|
|
|
|
if (colonp != NULL) {
|
|
|
|
/*
|
|
|
|
* Since some memmove()'s erroneously fail to handle
|
|
|
|
* overlapping regions, we'll do the shift by hand.
|
|
|
|
*/
|
|
|
|
const ssize_t n = tp - colonp;
|
|
|
|
ssize_t i;
|
|
|
|
|
|
|
|
if (tp == endp)
|
|
|
|
goto enoent;
|
|
|
|
for (i = 1; i <= n; i++) {
|
|
|
|
*(endp - i) = *(colonp + n - i);
|
|
|
|
*(colonp + n - i) = 0;
|
|
|
|
}
|
|
|
|
tp = endp;
|
|
|
|
}
|
|
|
|
if (tp != endp)
|
|
|
|
goto enoent;
|
|
|
|
|
|
|
|
bytes = (bits + 7) / 8;
|
|
|
|
if (bytes > size)
|
|
|
|
goto emsgsize;
|
|
|
|
memcpy(dst, tmp, bytes);
|
|
|
|
return (bits);
|
|
|
|
|
|
|
|
enoent:
|
|
|
|
SET_ERRNO(ENOENT);
|
|
|
|
return (-1);
|
|
|
|
|
|
|
|
emsgsize:
|
|
|
|
SET_ERRNO(EMSGSIZE);
|
|
|
|
return (-1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* int
|
|
|
|
* inet_net_pton(af, src, dst, size)
|
|
|
|
* convert network number from presentation to network format.
|
|
|
|
* accepts hex octets, hex strings, decimal octets, and /CIDR.
|
|
|
|
* "size" is in bytes and describes "dst".
|
|
|
|
* return:
|
|
|
|
* number of bits, either imputed classfully or specified with /CIDR,
|
|
|
|
* or -1 if some failure occurred (check errno). ENOENT means it was
|
|
|
|
* not a valid network specification.
|
|
|
|
* note:
|
|
|
|
* On Windows we store the error in the thread errno, not
|
|
|
|
* in the winsock error code. This is to avoid loosing the
|
|
|
|
* actual last winsock error. So use macro ERRNO to fetch the
|
|
|
|
* errno this funtion sets when returning (-1), not SOCKERRNO.
|
|
|
|
* author:
|
|
|
|
* Paul Vixie (ISC), June 1996
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
ares_inet_net_pton(int af, const char *src, void *dst, size_t size)
|
|
|
|
{
|
|
|
|
switch (af) {
|
|
|
|
case AF_INET:
|
|
|
|
return (inet_net_pton_ipv4(src, dst, size));
|
|
|
|
case AF_INET6:
|
|
|
|
return (inet_net_pton_ipv6(src, dst, size));
|
|
|
|
default:
|
|
|
|
SET_ERRNO(EAFNOSUPPORT);
|
|
|
|
return (-1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-10-05 13:23:24 -07:00
|
|
|
int
|
|
|
|
evil_inet_pton(int af, const char *src, void *dst)
|
2011-05-19 05:00:06 -07:00
|
|
|
{
|
|
|
|
int result;
|
|
|
|
size_t size;
|
|
|
|
|
|
|
|
if (af == AF_INET)
|
|
|
|
size = sizeof(struct in_addr);
|
|
|
|
else if (af == AF_INET6)
|
|
|
|
size = sizeof(struct ares_in6_addr);
|
|
|
|
else
|
|
|
|
{
|
|
|
|
SET_ERRNO(EAFNOSUPPORT);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
result = ares_inet_net_pton(af, src, dst, size);
|
2011-10-05 13:23:24 -07:00
|
|
|
if ((result == -1) && (ERRNO == ENOENT))
|
2011-05-19 05:00:06 -07:00
|
|
|
return 0;
|
|
|
|
return (result > -1 ? 1 : -1);
|
|
|
|
}
|
2011-10-05 13:23:24 -07:00
|
|
|
|
|
|
|
|
|
|
|
/* const char *
|
|
|
|
* inet_ntop4(src, dst, size)
|
|
|
|
* format an IPv4 address, more or less like inet_ntoa()
|
|
|
|
* return:
|
|
|
|
* `dst' (as a const)
|
|
|
|
* notes:
|
|
|
|
* (1) uses no statics
|
|
|
|
* (2) takes a unsigned char* not an in_addr as input
|
|
|
|
* author:
|
|
|
|
* Paul Vixie, 1996.
|
|
|
|
*/
|
|
|
|
static const char *
|
|
|
|
inet_ntop4(const unsigned char *src, char *dst, size_t size)
|
|
|
|
{
|
|
|
|
static const char fmt[] = "%u.%u.%u.%u";
|
|
|
|
char tmp[sizeof "255.255.255.255"];
|
|
|
|
|
|
|
|
if (SPRINTF((tmp, fmt, src[0], src[1], src[2], src[3])) > size)
|
|
|
|
{
|
|
|
|
SET_ERRNO(ENOSPC);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
strcpy(dst, tmp);
|
|
|
|
return (dst);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* const char *
|
|
|
|
* inet_ntop6(src, dst, size)
|
|
|
|
* convert IPv6 binary address into presentation (printable) format
|
|
|
|
* author:
|
|
|
|
* Paul Vixie, 1996.
|
|
|
|
*/
|
|
|
|
static const char *
|
|
|
|
inet_ntop6(const unsigned char *src, char *dst, size_t 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")];
|
|
|
|
char *tp;
|
|
|
|
struct {
|
|
|
|
long base;
|
|
|
|
long len;
|
|
|
|
} best, cur;
|
|
|
|
unsigned long words[NS_IN6ADDRSZ / NS_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 < NS_IN6ADDRSZ; i++)
|
|
|
|
words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
|
|
|
|
|
|
|
|
best.base = -1;
|
|
|
|
cur.base = -1;
|
|
|
|
best.len = 0;
|
|
|
|
cur.len = 0;
|
|
|
|
|
|
|
|
for (i = 0; i < (NS_IN6ADDRSZ / NS_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 < (NS_IN6ADDRSZ / NS_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, "%lx", words[i]));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Was it a trailing run of 0x00's? */
|
|
|
|
if (best.base != -1 && (best.base + best.len) == (NS_IN6ADDRSZ / NS_INT16SZ))
|
|
|
|
*tp++ = ':';
|
|
|
|
*tp++ = '\0';
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check for overflow, copy, and we're done.
|
|
|
|
*/
|
|
|
|
if ((size_t)(tp - tmp) > size)
|
|
|
|
{
|
|
|
|
SET_ERRNO(ENOSPC);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
strcpy(dst, tmp);
|
|
|
|
return (dst);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* char *
|
|
|
|
* inet_ntop(af, src, dst, size)
|
|
|
|
* convert a network format address to presentation format.
|
|
|
|
* return:
|
|
|
|
* pointer to presentation format address (`dst'), or NULL (see errno).
|
|
|
|
* note:
|
|
|
|
* On Windows we store the error in the thread errno, not
|
|
|
|
* in the winsock error code. This is to avoid loosing the
|
|
|
|
* actual last winsock error. So use macro ERRNO to fetch the
|
|
|
|
* errno this funtion sets when returning NULL, not SOCKERRNO.
|
|
|
|
* author:
|
|
|
|
* Paul Vixie, 1996.
|
|
|
|
*/
|
|
|
|
static const char *
|
|
|
|
ares_inet_ntop(int af, const void *src, char *dst, size_t size)
|
|
|
|
{
|
|
|
|
switch (af)
|
|
|
|
{
|
|
|
|
case AF_INET:
|
|
|
|
return (inet_ntop4(src, dst, size));
|
|
|
|
case AF_INET6:
|
|
|
|
return (inet_ntop6(src, dst, size));
|
|
|
|
default:
|
|
|
|
SET_ERRNO(EAFNOSUPPORT);
|
|
|
|
return (NULL);
|
|
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
|
|
}
|
|
|
|
|
2011-10-05 13:34:23 -07:00
|
|
|
const char *evil_inet_ntop(int af, const char *src, void *dst, size_t size)
|
2011-10-05 13:23:24 -07:00
|
|
|
{
|
|
|
|
const char *result;
|
|
|
|
result = ares_inet_ntop(af, src, dst, size);
|
|
|
|
if ((result == NULL) && (ERRNO == ENOSPC))
|
|
|
|
return NULL;
|
|
|
|
return result;
|
|
|
|
}
|