Sync inet_net_pton() and inet_net_ntop() with latest BIND9's includes
an IPv6 support. PR: kern/93740 Submitted by: Rudolf Cejka <cejkar__at__fit.vutbr.cz> Obtained from: BIND9 MFC after: 1 week
This commit is contained in:
Hajimu UMEMOTO
parent
9cb77fbf1a
commit
12d96fe63f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=156018
@ -36,7 +36,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 18, 1997
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.Dd February 26, 2006
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.Dt INET_NET 3
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.Os
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.Sh NAME
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@ -88,10 +88,12 @@ It will be set to
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.Er ENOENT
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if the Internet network number was not valid).
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.Pp
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The only value for
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The currently supported values for
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.Fa af
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currently supported is
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.Dv AF_INET .
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are
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.Dv AF_INET
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and
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.Dv AF_INET6 .
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The
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.Fa size
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argument
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@ -149,6 +151,10 @@ may be decimal, octal, or hexadecimal, as specified
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in the C language (i.e., a leading 0x or 0X implies
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hexadecimal; otherwise, a leading 0 implies octal;
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otherwise, the number is interpreted as decimal).
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.\"
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.\" .Sh NETWORK NUMBERS (IP VERSION 6)
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.\" XXX - document this!
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.\"
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.Sh SEE ALSO
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.Xr byteorder 3 ,
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.Xr inet 3 ,
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@ -1,22 +1,22 @@
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/*
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* Copyright (c) 1996 by Internet Software Consortium.
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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 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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* 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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#if defined(LIBC_SCCS) && !defined(lint)
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static const char orig_rcsid[] = "From Id: inet_net_ntop.c,v 8.2 1996/08/08 06:54:44 vixie Exp";
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static const char orig_rcsid[] = "From Id: inet_net_ntop.c,v 1.1.2.1.8.1 2004/03/09 08:33:32 marka Exp";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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@ -39,6 +39,8 @@ __FBSDID("$FreeBSD$");
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static char * inet_net_ntop_ipv4(const u_char *src, int bits, char *dst,
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size_t size);
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static char * inet_net_ntop_ipv6(const u_char *src, int bits, char *dst,
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size_t size);
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/*
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* char *
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@ -61,6 +63,8 @@ inet_net_ntop(af, src, bits, dst, size)
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switch (af) {
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case AF_INET:
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return (inet_net_ntop_ipv4(src, bits, dst, size));
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case AF_INET6:
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return (inet_net_ntop_ipv6(src, bits, dst, size));
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default:
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errno = EAFNOSUPPORT;
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return (NULL);
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@ -76,7 +80,7 @@ inet_net_ntop(af, src, bits, dst, size)
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* pointer to dst, or NULL if an error occurred (check errno).
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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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* 0x11110000 in its fourth octet.
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* 0b11110000 in its fourth octet.
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* author:
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* Paul Vixie (ISC), July 1996
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*/
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@ -96,16 +100,18 @@ inet_net_ntop_ipv4(src, bits, dst, size)
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errno = EINVAL;
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return (NULL);
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}
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if (bits == 0) {
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if (size < sizeof "0")
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goto emsgsize;
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*dst++ = '0';
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size--;
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*dst = '\0';
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}
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/* Format whole octets. */
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for (b = bits / 8; b > 0; b--) {
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if (size < sizeof "255.")
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if (size <= sizeof "255.")
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goto emsgsize;
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t = dst;
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dst += SPRINTF((dst, "%u", *src++));
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@ -119,7 +125,7 @@ inet_net_ntop_ipv4(src, bits, dst, size)
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/* Format partial octet. */
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b = bits % 8;
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if (b > 0) {
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if (size < sizeof ".255")
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if (size <= sizeof ".255")
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goto emsgsize;
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t = dst;
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if (dst != odst)
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@ -130,7 +136,7 @@ inet_net_ntop_ipv4(src, bits, dst, size)
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}
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/* Format CIDR /width. */
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if (size < sizeof "/32")
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if (size <= sizeof "/32")
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goto emsgsize;
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dst += SPRINTF((dst, "/%u", bits));
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return (odst);
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@ -140,6 +146,133 @@ inet_net_ntop_ipv4(src, bits, dst, size)
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return (NULL);
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}
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/*
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* static char *
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* inet_net_ntop_ipv6(src, bits, fakebits, dst, size)
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* convert IPv6 network number from network to presentation format.
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* generates CIDR style result always. Picks the shortest representation
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* unless the IP is really IPv4.
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* always prints specified number of bits (bits).
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* return:
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* pointer to dst, or NULL if an error occurred (check errno).
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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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* author:
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* Vadim Kogan (UCB), June 2001
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* Original version (IPv4) by Paul Vixie (ISC), July 1996
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*/
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static char *
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inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size) {
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u_int m;
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int b;
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int p;
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int zero_s, zero_l, tmp_zero_s, tmp_zero_l;
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int i;
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int is_ipv4 = 0;
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unsigned char inbuf[16];
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char outbuf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255/128")];
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char *cp;
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int words;
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u_char *s;
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if (bits < 0 || bits > 128) {
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errno = EINVAL;
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return (NULL);
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}
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cp = outbuf;
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if (bits == 0) {
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*cp++ = ':';
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*cp++ = ':';
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*cp = '\0';
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} else {
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/* Copy src to private buffer. Zero host part. */
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p = (bits + 7) / 8;
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memcpy(inbuf, src, p);
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memset(inbuf + p, 0, 16 - p);
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b = bits % 8;
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if (b != 0) {
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m = ~0 << (8 - b);
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inbuf[p-1] &= m;
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}
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s = inbuf;
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/* how many words need to be displayed in output */
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words = (bits + 15) / 16;
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if (words == 1)
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words = 2;
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/* Find the longest substring of zero's */
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zero_s = zero_l = tmp_zero_s = tmp_zero_l = 0;
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for (i = 0; i < (words * 2); i += 2) {
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if ((s[i] | s[i+1]) == 0) {
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if (tmp_zero_l == 0)
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tmp_zero_s = i / 2;
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tmp_zero_l++;
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} else {
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if (tmp_zero_l && zero_l < tmp_zero_l) {
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zero_s = tmp_zero_s;
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zero_l = tmp_zero_l;
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tmp_zero_l = 0;
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}
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}
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}
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if (tmp_zero_l && zero_l < tmp_zero_l) {
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zero_s = tmp_zero_s;
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zero_l = tmp_zero_l;
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}
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if (zero_l != words && zero_s == 0 && ((zero_l == 6) ||
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((zero_l == 5 && s[10] == 0xff && s[11] == 0xff) ||
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((zero_l == 7 && s[14] != 0 && s[15] != 1)))))
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is_ipv4 = 1;
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/* Format whole words. */
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for (p = 0; p < words; p++) {
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if (zero_l != 0 && p >= zero_s && p < zero_s + zero_l) {
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/* Time to skip some zeros */
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if (p == zero_s)
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*cp++ = ':';
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if (p == words - 1)
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*cp++ = ':';
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s++;
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s++;
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continue;
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}
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if (is_ipv4 && p > 5 ) {
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*cp++ = (p == 6) ? ':' : '.';
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cp += SPRINTF((cp, "%u", *s++));
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/* we can potentially drop the last octet */
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if (p != 7 || bits > 120) {
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*cp++ = '.';
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cp += SPRINTF((cp, "%u", *s++));
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}
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} else {
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if (cp != outbuf)
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*cp++ = ':';
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cp += SPRINTF((cp, "%x", *s * 256 + s[1]));
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s += 2;
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}
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}
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}
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/* Format CIDR /width. */
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SPRINTF((cp, "/%u", bits));
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if (strlen(outbuf) + 1 > size)
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goto emsgsize;
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strcpy(dst, outbuf);
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return (dst);
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emsgsize:
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errno = EMSGSIZE;
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return (NULL);
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}
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/*
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* Weak aliases for applications that use certain private entry points,
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* and fail to include <arpa/inet.h>.
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@ -1,22 +1,22 @@
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/*
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* Copyright (c) 1996 by Internet Software Consortium.
|
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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.
|
||||
*
|
||||
* 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.
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
|
||||
*/
|
||||
|
||||
#if defined(LIBC_SCCS) && !defined(lint)
|
||||
static const char orig_rcsid[] = "From Id: inet_net_pton.c,v 1.8 1996/11/21 10:28:12 vixie Exp $";
|
||||
static const char orig_rcsid[] = "From Id: inet_net_pton.c,v 1.4.2.1.8.2 2004/03/17 00:29:47 marka Exp";
|
||||
#endif
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
@ -24,6 +24,7 @@ __FBSDID("$FreeBSD$");
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#include <arpa/nameser.h>
|
||||
#include <arpa/inet.h>
|
||||
|
||||
#include <assert.h>
|
||||
@ -39,37 +40,6 @@ __FBSDID("$FreeBSD$");
|
||||
# define SPRINTF(x) ((size_t)sprintf x)
|
||||
#endif
|
||||
|
||||
static int inet_net_pton_ipv4(const char *src, u_char *dst, size_t size);
|
||||
|
||||
/*
|
||||
* static 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.
|
||||
* author:
|
||||
* Paul Vixie (ISC), June 1996
|
||||
*/
|
||||
int
|
||||
inet_net_pton(af, src, dst, size)
|
||||
int af;
|
||||
const char *src;
|
||||
void *dst;
|
||||
size_t size;
|
||||
{
|
||||
switch (af) {
|
||||
case AF_INET:
|
||||
return (inet_net_pton_ipv4(src, dst, size));
|
||||
default:
|
||||
errno = EAFNOSUPPORT;
|
||||
return (-1);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* static int
|
||||
* inet_net_pton_ipv4(src, dst, size)
|
||||
@ -82,46 +52,47 @@ inet_net_pton(af, src, dst, size)
|
||||
* not an IPv4 network specification.
|
||||
* note:
|
||||
* network byte order assumed. this means 192.5.5.240/28 has
|
||||
* 0x11110000 in its fourth octet.
|
||||
* 0b11110000 in its fourth octet.
|
||||
* author:
|
||||
* Paul Vixie (ISC), June 1996
|
||||
*/
|
||||
static int
|
||||
inet_net_pton_ipv4(src, dst, size)
|
||||
const char *src;
|
||||
u_char *dst;
|
||||
size_t size;
|
||||
{
|
||||
static const char
|
||||
xdigits[] = "0123456789abcdef",
|
||||
digits[] = "0123456789";
|
||||
int n, ch, tmp, dirty, bits;
|
||||
inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
|
||||
static const char xdigits[] = "0123456789abcdef";
|
||||
static const char digits[] = "0123456789";
|
||||
int n, ch, tmp = 0, dirty, bits;
|
||||
const u_char *odst = dst;
|
||||
|
||||
ch = *src++;
|
||||
if (ch == '0' && (src[0] == 'x' || src[0] == 'X')
|
||||
&& isascii(src[1]) && isxdigit(src[1])) {
|
||||
&& isascii((unsigned char)(src[1]))
|
||||
&& isxdigit((unsigned char)(src[1]))) {
|
||||
/* Hexadecimal: Eat nybble string. */
|
||||
if (size <= 0)
|
||||
if (size <= 0U)
|
||||
goto emsgsize;
|
||||
*dst = 0, dirty = 0;
|
||||
dirty = 0;
|
||||
src++; /* skip x or X. */
|
||||
while ((ch = *src++) != '\0' &&
|
||||
isascii(ch) && isxdigit(ch)) {
|
||||
while ((ch = *src++) != '\0' && isascii(ch) && isxdigit(ch)) {
|
||||
if (isupper(ch))
|
||||
ch = tolower(ch);
|
||||
n = strchr(xdigits, ch) - xdigits;
|
||||
assert(n >= 0 && n <= 15);
|
||||
*dst |= n;
|
||||
if (!dirty++)
|
||||
*dst <<= 4;
|
||||
else if (size-- > 0)
|
||||
*++dst = 0, dirty = 0;
|
||||
if (dirty == 0)
|
||||
tmp = n;
|
||||
else
|
||||
goto emsgsize;
|
||||
tmp = (tmp << 4) | n;
|
||||
if (++dirty == 2) {
|
||||
if (size-- <= 0U)
|
||||
goto emsgsize;
|
||||
*dst++ = (u_char) tmp;
|
||||
dirty = 0;
|
||||
}
|
||||
}
|
||||
if (dirty) { /* Odd trailing nybble? */
|
||||
if (size-- <= 0U)
|
||||
goto emsgsize;
|
||||
*dst++ = (u_char) (tmp << 4);
|
||||
}
|
||||
if (dirty)
|
||||
size--;
|
||||
} else if (isascii(ch) && isdigit(ch)) {
|
||||
/* Decimal: eat dotted digit string. */
|
||||
for (;;) {
|
||||
@ -135,7 +106,7 @@ inet_net_pton_ipv4(src, dst, size)
|
||||
goto enoent;
|
||||
} while ((ch = *src++) != '\0' &&
|
||||
isascii(ch) && isdigit(ch));
|
||||
if (size-- <= 0)
|
||||
if (size-- <= 0U)
|
||||
goto emsgsize;
|
||||
*dst++ = (u_char) tmp;
|
||||
if (ch == '\0' || ch == '/')
|
||||
@ -150,7 +121,8 @@ inet_net_pton_ipv4(src, dst, size)
|
||||
goto enoent;
|
||||
|
||||
bits = -1;
|
||||
if (ch == '/' && isascii(src[0]) && isdigit(src[0]) && dst > odst) {
|
||||
if (ch == '/' && isascii((unsigned char)(src[0])) &&
|
||||
isdigit((unsigned char)(src[0])) && dst > odst) {
|
||||
/* CIDR width specifier. Nothing can follow it. */
|
||||
ch = *src++; /* Skip over the /. */
|
||||
bits = 0;
|
||||
@ -178,7 +150,7 @@ inet_net_pton_ipv4(src, dst, size)
|
||||
if (*odst >= 240) /* Class E */
|
||||
bits = 32;
|
||||
else if (*odst >= 224) /* Class D */
|
||||
bits = 4;
|
||||
bits = 8;
|
||||
else if (*odst >= 192) /* Class C */
|
||||
bits = 24;
|
||||
else if (*odst >= 128) /* Class B */
|
||||
@ -188,10 +160,16 @@ inet_net_pton_ipv4(src, dst, size)
|
||||
/* If imputed mask is narrower than specified octets, widen. */
|
||||
if (bits < ((dst - odst) * 8))
|
||||
bits = (dst - odst) * 8;
|
||||
/*
|
||||
* If there are no additional bits specified for a class D
|
||||
* address adjust bits to 4.
|
||||
*/
|
||||
if (bits == 8 && *odst == 224)
|
||||
bits = 4;
|
||||
}
|
||||
/* Extend network to cover the actual mask. */
|
||||
while (bits > ((dst - odst) * 8)) {
|
||||
if (size-- <= 0)
|
||||
if (size-- <= 0U)
|
||||
goto emsgsize;
|
||||
*dst++ = '\0';
|
||||
}
|
||||
@ -206,6 +184,224 @@ inet_net_pton_ipv4(src, dst, size)
|
||||
return (-1);
|
||||
}
|
||||
|
||||
static int
|
||||
getbits(const char *src, int *bitsp) {
|
||||
static const char digits[] = "0123456789";
|
||||
int n;
|
||||
int val;
|
||||
char ch;
|
||||
|
||||
val = 0;
|
||||
n = 0;
|
||||
while ((ch = *src++) != '\0') {
|
||||
const char *pch;
|
||||
|
||||
pch = strchr(digits, ch);
|
||||
if (pch != NULL) {
|
||||
if (n++ != 0 && val == 0) /* no leading zeros */
|
||||
return (0);
|
||||
val *= 10;
|
||||
val += (pch - digits);
|
||||
if (val > 128) /* range */
|
||||
return (0);
|
||||
continue;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
if (n == 0)
|
||||
return (0);
|
||||
*bitsp = val;
|
||||
return (1);
|
||||
}
|
||||
|
||||
static int
|
||||
getv4(const char *src, u_char *dst, int *bitsp) {
|
||||
static const char digits[] = "0123456789";
|
||||
u_char *odst = dst;
|
||||
int n;
|
||||
u_int val;
|
||||
char ch;
|
||||
|
||||
val = 0;
|
||||
n = 0;
|
||||
while ((ch = *src++) != '\0') {
|
||||
const char *pch;
|
||||
|
||||
pch = strchr(digits, ch);
|
||||
if (pch != NULL) {
|
||||
if (n++ != 0 && val == 0) /* no leading zeros */
|
||||
return (0);
|
||||
val *= 10;
|
||||
val += (pch - digits);
|
||||
if (val > 255) /* range */
|
||||
return (0);
|
||||
continue;
|
||||
}
|
||||
if (ch == '.' || ch == '/') {
|
||||
if (dst - odst > 3) /* too many octets? */
|
||||
return (0);
|
||||
*dst++ = val;
|
||||
if (ch == '/')
|
||||
return (getbits(src, bitsp));
|
||||
val = 0;
|
||||
n = 0;
|
||||
continue;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
if (n == 0)
|
||||
return (0);
|
||||
if (dst - odst > 3) /* too many octets? */
|
||||
return (0);
|
||||
*dst++ = val;
|
||||
return (1);
|
||||
}
|
||||
|
||||
static int
|
||||
inet_net_pton_ipv6(const char *src, u_char *dst, size_t size) {
|
||||
static const char xdigits_l[] = "0123456789abcdef",
|
||||
xdigits_u[] = "0123456789ABCDEF";
|
||||
u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
|
||||
const char *xdigits, *curtok;
|
||||
int ch, saw_xdigit;
|
||||
u_int val;
|
||||
int digits;
|
||||
int bits;
|
||||
size_t bytes;
|
||||
int words;
|
||||
int ipv4;
|
||||
|
||||
memset((tp = tmp), '\0', NS_IN6ADDRSZ);
|
||||
endp = tp + NS_IN6ADDRSZ;
|
||||
colonp = NULL;
|
||||
/* Leading :: requires some special handling. */
|
||||
if (*src == ':')
|
||||
if (*++src != ':')
|
||||
goto enoent;
|
||||
curtok = src;
|
||||
saw_xdigit = 0;
|
||||
val = 0;
|
||||
digits = 0;
|
||||
bits = -1;
|
||||
ipv4 = 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 (++digits > 4)
|
||||
goto enoent;
|
||||
saw_xdigit = 1;
|
||||
continue;
|
||||
}
|
||||
if (ch == ':') {
|
||||
curtok = src;
|
||||
if (!saw_xdigit) {
|
||||
if (colonp)
|
||||
goto enoent;
|
||||
colonp = tp;
|
||||
continue;
|
||||
} else if (*src == '\0')
|
||||
goto enoent;
|
||||
if (tp + NS_INT16SZ > endp)
|
||||
return (0);
|
||||
*tp++ = (u_char) (val >> 8) & 0xff;
|
||||
*tp++ = (u_char) val & 0xff;
|
||||
saw_xdigit = 0;
|
||||
digits = 0;
|
||||
val = 0;
|
||||
continue;
|
||||
}
|
||||
if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
|
||||
getv4(curtok, tp, &bits) > 0) {
|
||||
tp += NS_INADDRSZ;
|
||||
saw_xdigit = 0;
|
||||
ipv4 = 1;
|
||||
break; /* '\0' was seen by inet_pton4(). */
|
||||
}
|
||||
if (ch == '/' && getbits(src, &bits) > 0)
|
||||
break;
|
||||
goto enoent;
|
||||
}
|
||||
if (saw_xdigit) {
|
||||
if (tp + NS_INT16SZ > endp)
|
||||
goto enoent;
|
||||
*tp++ = (u_char) (val >> 8) & 0xff;
|
||||
*tp++ = (u_char) val & 0xff;
|
||||
}
|
||||
if (bits == -1)
|
||||
bits = 128;
|
||||
|
||||
words = (bits + 15) / 16;
|
||||
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 int n = tp - colonp;
|
||||
int 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:
|
||||
errno = ENOENT;
|
||||
return (-1);
|
||||
|
||||
emsgsize:
|
||||
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.
|
||||
* author:
|
||||
* Paul Vixie (ISC), June 1996
|
||||
*/
|
||||
int
|
||||
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:
|
||||
errno = EAFNOSUPPORT;
|
||||
return (-1);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Weak aliases for applications that use certain private entry points,
|
||||
* and fail to include <arpa/inet.h>.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user