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99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
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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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#if defined(LIBC_SCCS) && !defined(lint)
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static const char rcsid[] = "$Id: inet_neta.c,v 1.3 2005/04/27 04:56:20 sra Exp $";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <errno.h>
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#include <stdio.h>
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#include <string.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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/*%
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* char *
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* inet_neta(src, dst, size)
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* format an in_addr_t network number into presentation format.
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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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* format of ``src'' is as for inet_network().
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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_neta(src, dst, size)
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in_addr_t src;
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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 *tp;
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while (src & 0xffffffff) {
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u_char b = (src & 0xff000000) >> 24;
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src <<= 8;
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if (b) {
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if (size < sizeof "255.")
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goto emsgsize;
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tp = dst;
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dst += SPRINTF((dst, "%u", b));
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if (src != 0L) {
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*dst++ = '.';
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*dst = '\0';
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}
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size -= (size_t)(dst - tp);
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}
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}
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if (dst == odst) {
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if (size < sizeof "0.0.0.0")
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goto emsgsize;
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strcpy(dst, "0.0.0.0");
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}
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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_neta
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__weak_reference(__inet_neta, inet_neta);
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/*! \file */
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