| 1 | /*
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| 2 | * Copyright (c) 1996 by Internet Software Consortium.
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| 3 | *
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| 4 | * Permission to use, copy, modify, and distribute this software for any
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| 5 | * purpose with or without fee is hereby granted, provided that the above
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| 6 | * copyright notice and this permission notice appear in all copies.
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| 7 | *
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| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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| 9 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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| 10 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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| 11 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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| 12 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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| 13 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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| 14 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 15 | * SOFTWARE.
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| 16 | */
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| 17 |
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| 18 | /*
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| 19 | * Portions copyright (c) 1999, 2000
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| 20 | * Intel Corporation.
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| 21 | * All rights reserved.
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| 22 | *
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| 23 | * Redistribution and use in source and binary forms, with or without
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| 24 | * modification, are permitted provided that the following conditions
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| 25 | * are met:
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| 26 | *
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| 27 | * 1. Redistributions of source code must retain the above copyright
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| 28 | * notice, this list of conditions and the following disclaimer.
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| 29 | *
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| 30 | * 2. Redistributions in binary form must reproduce the above copyright
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| 31 | * notice, this list of conditions and the following disclaimer in the
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| 32 | * documentation and/or other materials provided with the distribution.
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| 33 | *
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| 34 | * 3. All advertising materials mentioning features or use of this software
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| 35 | * must display the following acknowledgement:
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| 36 | *
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| 37 | * This product includes software developed by Intel Corporation and
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| 38 | * its contributors.
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| 39 | *
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| 40 | * 4. Neither the name of Intel Corporation or its contributors may be
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| 41 | * used to endorse or promote products derived from this software
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| 42 | * without specific prior written permission.
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| 43 | *
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| 44 | * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''
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| 45 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 46 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 47 | * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE
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| 48 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 49 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 50 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 51 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 52 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 53 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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| 54 | * THE POSSIBILITY OF SUCH DAMAGE.
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| 55 | *
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| 56 | */
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| 57 |
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| 58 | #if defined(LIBC_SCCS) && !defined(lint)
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| 59 | static const char orig_rcsid[] = "From Id: inet_neta.c,v 8.2 1996/08/08 06:54:44 vixie Exp";
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| 60 | static const char rcsid[] = "$Id: inet_neta.c,v 1.1.1.1 2003/11/19 01:51:29 kyu3 Exp $";
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| 61 | #endif
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| 62 |
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| 63 | #include <sys/types.h>
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| 64 | #include <sys/socket.h>
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| 65 | #include <netinet/in.h>
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| 66 | #include <arpa/inet.h>
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| 67 |
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| 68 | #include <errno.h>
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| 69 | #include <stdio.h>
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| 70 | #include <string.h>
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| 71 |
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| 72 | #ifdef SPRINTF_CHAR
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| 73 | # define SPRINTF(x) strlen(sprintf/**/x)
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| 74 | #else
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| 75 | # define SPRINTF(x) ((size_t)sprintf x)
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| 76 | #endif
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| 77 |
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| 78 | /*
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| 79 | * char *
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| 80 | * inet_neta(src, dst, size)
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| 81 | * format a u_long network number into presentation format.
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| 82 | * return:
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| 83 | * pointer to dst, or NULL if an error occurred (check errno).
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| 84 | * note:
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| 85 | * format of ``src'' is as for inet_network().
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| 86 | * author:
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| 87 | * Paul Vixie (ISC), July 1996
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| 88 | */
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| 89 | char *
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| 90 | inet_neta(
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| 91 | u_long src,
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| 92 | char *dst,
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| 93 | size_t size
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| 94 | )
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| 95 | {
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| 96 | char *odst = dst;
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| 97 | char *tp;
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| 98 |
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| 99 | while (src & 0xffffffff) {
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| 100 | u_char b = (u_char)((src & 0xff000000) >> 24);
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| 101 |
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| 102 | src <<= 8;
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| 103 | if (b) {
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| 104 | if (size < sizeof "255.")
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| 105 | goto emsgsize;
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| 106 | tp = dst;
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| 107 | dst += SPRINTF((dst, "%u", b));
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| 108 | if (src != 0L) {
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| 109 | *dst++ = '.';
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| 110 | *dst = '\0';
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| 111 | }
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| 112 | size -= (size_t)(dst - tp);
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| 113 | }
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| 114 | }
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| 115 | if (dst == odst) {
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| 116 | if (size < sizeof "0.0.0.0")
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| 117 | goto emsgsize;
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| 118 | strcpy(dst, "0.0.0.0");
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| 119 | }
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| 120 | return (odst);
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| 121 |
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| 122 | emsgsize:
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| 123 | errno = EMSGSIZE;
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| 124 | return (NULL);
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| 125 | }
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