/* $NetBSD: inet_neta.c,v 1.1 2004/05/20 23:13:02 christos Exp $ */ /* * Copyright (c) 1996 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. */ #include #if defined(LIBC_SCCS) && !defined(lint) #if 0 static const char rcsid[] = "Id: inet_neta.c,v 8.2 1996/08/08 06:54:44 vixie Exp "; #else __RCSID("$NetBSD: inet_neta.c,v 1.1 2004/05/20 23:13:02 christos Exp $"); #endif #endif #include "namespace.h" #include #include #include #include #include #include #include #include #ifdef __weak_alias __weak_alias(inet_neta,_inet_neta) #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_long src; char *dst; size_t size; { char *odst = dst; char *ep; int advance; _DIAGASSERT(dst != NULL); if (src == 0x00000000) { if (size < sizeof "0.0.0.0") goto emsgsize; strlcpy(dst, "0.0.0.0", size); return dst; } ep = dst + size; if (ep <= dst) goto emsgsize; while (src & 0xffffffff) { u_char b = (u_char)((src & 0xff000000) >> 24); src <<= 8; if (b || src) { advance = snprintf(dst, (size_t)(ep - dst), "%u", b); if (advance <= 0 || advance >= ep - dst) goto emsgsize; dst += advance; if (src != 0L) { if (dst + 1 >= ep) goto emsgsize; *dst++ = '.'; *dst = '\0'; } } } return (odst); emsgsize: errno = EMSGSIZE; return (NULL); }