87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/*
|
|
* Copyright 1996 Massachusetts Institute of Technology
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and
|
|
* its documentation for any purpose and without fee is hereby
|
|
* granted, provided that both the above copyright notice and this
|
|
* permission notice appear in all copies, that both the above
|
|
* copyright notice and this permission notice appear in all
|
|
* supporting documentation, and that the name of M.I.T. not be used
|
|
* in advertising or publicity pertaining to distribution of the
|
|
* software without specific, written prior permission. M.I.T. makes
|
|
* no representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied
|
|
* warranty.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
|
|
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
|
|
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $ANA: addr2ascii.c,v 1.1 1996/06/13 18:41:46 wollman Exp $
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#include <net/if_dl.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
/*-
|
|
* Convert a network address from binary to printable numeric format.
|
|
* This API is copied from INRIA's IPv6 implementation, but it is a
|
|
* bit bogus in two ways:
|
|
*
|
|
* 1) There is no value in passing both an address family and
|
|
* an address length; either one should imply the other,
|
|
* or we should be passing sockaddrs instead.
|
|
* 2) There should by contrast be /added/ a length for the buffer
|
|
* that we pass in, so that programmers are spared the need to
|
|
* manually calculate (read: ``guess'') the maximum length.
|
|
*
|
|
* Flash: the API is also the same in the NRL implementation, and seems to
|
|
* be some sort of standard, so we appear to be stuck with both the bad
|
|
* naming and the poor choice of arguments.
|
|
*/
|
|
char *
|
|
addr2ascii(af, addrp, len, buf)
|
|
int af;
|
|
const void *addrp;
|
|
int len; /* should be size_t XXX */
|
|
char *buf; /* XXX should pass length of buffer */
|
|
{
|
|
static char staticbuf[64]; /* 64 for AF_LINK > 16 for AF_INET */
|
|
|
|
if (!buf)
|
|
buf = staticbuf;
|
|
|
|
switch(af) {
|
|
case AF_INET:
|
|
if (len != sizeof(struct in_addr)) {
|
|
errno = ENAMETOOLONG;
|
|
return 0;
|
|
}
|
|
strcpy(buf, inet_ntoa(*(const struct in_addr *)addrp));
|
|
break;
|
|
|
|
default:
|
|
errno = EPROTONOSUPPORT;
|
|
return 0;
|
|
}
|
|
return buf;
|
|
}
|