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/* $OpenBSD: k_getsockinst.c,v 1.2 1997/12/09 07:57:22 art Exp $ */
/* $KTH: k_getsockinst.c,v 1.10 1997/05/02 14:29:17 assar Exp $ */
/*
* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS 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.
*/
#include "krb_locl.h"
/*
* Return in inst the name of the local interface bound to socket
* fd. On Failure return the 'wildcard' instance "*".
*/
int
k_getsockinst(int fd, char *inst, size_t inst_size)
{
struct sockaddr_in addr;
int len = sizeof(addr);
struct hostent *hnam;
if (inst == NULL)
return -1;
if (getsockname(fd, (struct sockaddr *)&addr, &len) < 0)
goto fail;
hnam = gethostbyaddr((char *)&addr.sin_addr,
sizeof(addr.sin_addr),
addr.sin_family);
if (hnam == 0)
goto fail;
strncpy (inst, hnam->h_name, inst_size);
inst[inst_size - 1] = '\0';
k_ricercar(inst); /* Canonicalize name */
return 0; /* Success */
fail:
inst[0] = '*';
inst[1] = 0;
return -1;
}
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