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/* $KTH: name2name.c,v 1.15 1997/04/30 04:30:36 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"
/* convert host to a more fully qualified domain name, returns 0 if
* phost is the same as host, 1 otherwise. phost should be
* phost_size bytes long.
*/
int
krb_name_to_name(const char *host, char *phost, size_t phost_size)
{
struct hostent *hp;
struct in_addr adr;
const char *tmp;
adr.s_addr = inet_addr(host);
hp = gethostbyname(host);
if (hp == NULL && adr.s_addr != INADDR_NONE)
hp = gethostbyaddr((char *)&adr, sizeof(adr), AF_INET);
if (hp == NULL)
tmp = host;
else
tmp = hp->h_name;
strncpy (phost, tmp, phost_size);
phost[phost_size - 1] = '\0';
if (strcmp(phost, host) == 0)
return 0;
else
return 1;
}
/* lowercase and truncate */
void
k_ricercar(char *name)
{
char *p = name;
while(*p && *p != '.'){
if(isupper(*p))
*p = tolower(*p);
p++;
}
if(*p == '.')
*p = 0;
}
/*
* This routine takes an alias for a host name and returns the first
* field, in lower case, of its domain name.
*
* Example: "fOo.BAR.com" -> "foo"
*/
char *
krb_get_phost(const char *alias)
{
static char phost[MAXHOSTNAMELEN];
krb_name_to_name(alias, phost, sizeof(phost));
k_ricercar(phost);
return phost;
}
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