/* * 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); }