| /* |
| * 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. |
| */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| static const char rcsid[] = "$BINDId: inet_neta.c,v 1.6 1999/01/08 19:23:45 vixie Exp $"; |
| #endif |
| |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #ifdef SPRINTF_CHAR |
| # define SPRINTF(x) strlen(sprintf/**/x) |
| #else |
| # define SPRINTF(x) ((size_t)sprintf x) |
| #endif |
| |
| /* |
| * char * |
| * inet_neta(src, dst, size) |
| * format a u_long network number into presentation format. |
| * return: |
| * pointer to dst, or NULL if an error occurred (check errno). |
| * note: |
| * format of ``src'' is as for inet_network(). |
| * author: |
| * Paul Vixie (ISC), July 1996 |
| */ |
| char * |
| inet_neta(src, dst, size) |
| u_int32_t src; |
| char *dst; |
| size_t size; |
| { |
| char *odst = dst; |
| char *tp; |
| |
| while (src & 0xffffffff) { |
| u_char b = (src & 0xff000000) >> 24; |
| |
| src <<= 8; |
| if (b) { |
| if (size < sizeof "255.") |
| goto emsgsize; |
| tp = dst; |
| dst += SPRINTF((dst, "%u", b)); |
| if (src != 0L) { |
| *dst++ = '.'; |
| *dst = '\0'; |
| } |
| size -= (size_t)(dst - tp); |
| } |
| } |
| if (dst == odst) { |
| if (size < sizeof "0.0.0.0") |
| goto emsgsize; |
| strcpy(dst, "0.0.0.0"); |
| } |
| return (odst); |
| |
| emsgsize: |
| __set_errno (EMSGSIZE); |
| return (NULL); |
| } |