cb690d1f0b
and res_* modules in a way that works for ELF. I moved the aliases out of res_stubs.c and into the individual modules where the entry points are defined. Weak aliases don't work in ELF unless that is the case. (Actually, I'm surprised it worked for a.out.) This should fix the undefined "inet_addr" and related symbols in various applications that fail to include <arpa/inet.h> or <resolv.h> as they are supposed to do.
148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*
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* Copyright (c) 1996 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 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 rcsid[] = "$Id: inet_net_ntop.c,v 1.3 1997/02/22 15:00:16 peter Exp $";
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#endif
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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 <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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#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 char * inet_net_ntop_ipv4 __P((const u_char *src, int bits,
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char *dst, size_t size));
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/*
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* char *
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* inet_net_ntop(af, src, bits, dst, size)
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* convert network number from network to presentation format.
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* generates CIDR style result always.
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* return:
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* pointer to dst, or NULL if an error occurred (check errno).
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* author:
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* Paul Vixie (ISC), July 1996
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*/
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char *
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inet_net_ntop(af, src, bits, dst, size)
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int af;
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const void *src;
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int bits;
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char *dst;
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size_t size;
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{
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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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default:
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errno = EAFNOSUPPORT;
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return (NULL);
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}
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}
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/*
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* static char *
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* inet_net_ntop_ipv4(src, bits, dst, size)
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* convert IPv4 network number from network to presentation format.
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* generates CIDR style result always.
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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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* 0x11110000 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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static char *
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inet_net_ntop_ipv4(src, bits, dst, size)
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const u_char *src;
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int bits;
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char *dst;
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size_t size;
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{
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char *odst = dst;
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char *t;
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u_int m;
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int b;
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if (bits < 0 || bits > 32) {
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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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*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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goto emsgsize;
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t = dst;
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dst += SPRINTF((dst, "%u", *src++));
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if (b > 1) {
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*dst++ = '.';
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*dst = '\0';
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}
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size -= (size_t)(dst - t);
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}
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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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goto emsgsize;
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t = dst;
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if (dst != odst)
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*dst++ = '.';
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m = ((1 << b) - 1) << (8 - b);
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dst += SPRINTF((dst, "%u", *src & m));
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size -= (size_t)(dst - t);
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}
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/* Format CIDR /width. */
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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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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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*/
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#undef inet_net_ntop
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__weak_reference(__inet_net_ntop, inet_net_ntop);
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