109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
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* Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb_locl.h"
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RCSID("$Id: name2name.c,v 1.22 1999/12/02 16:58:43 joda Exp $");
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/* convert host to a more fully qualified domain name, returns 0 if
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* phost is the same as host, 1 otherwise. phost should be
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* phost_size bytes long.
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*/
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int
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krb_name_to_name(const char *host, char *phost, size_t phost_size)
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{
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struct hostent *hp;
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struct in_addr adr;
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const char *tmp;
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adr.s_addr = inet_addr(host);
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if (adr.s_addr != INADDR_NONE)
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hp = gethostbyaddr((char *)&adr, sizeof(adr), AF_INET);
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else
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hp = gethostbyname(host);
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if (hp == NULL)
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tmp = host;
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else {
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tmp = hp->h_name;
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/*
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* Broken SunOS 5.4 sometimes keeps the official name as the
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* 1:st alias.
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*/
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if (strchr(tmp, '.') == NULL
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&& hp->h_aliases != NULL
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&& hp->h_aliases[0] != NULL
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&& strchr (hp->h_aliases[0], '.') != NULL)
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tmp = hp->h_aliases[0];
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}
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strlcpy (phost, tmp, phost_size);
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if (strcmp(phost, host) == 0)
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return 0;
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else
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return 1;
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}
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/* lowercase and truncate */
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void
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k_ricercar(char *name)
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{
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unsigned char *p = (unsigned char *)name;
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while(*p && *p != '.'){
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if(isupper(*p))
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*p = tolower(*p);
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p++;
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}
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if(*p == '.')
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*p = 0;
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}
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/*
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* This routine takes an alias for a host name and returns the first
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* field, in lower case, of its domain name.
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*
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* Example: "fOo.BAR.com" -> "foo"
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*/
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char *
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krb_get_phost(const char *alias)
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{
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static char phost[MaxHostNameLen];
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krb_name_to_name(alias, phost, sizeof(phost));
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k_ricercar(phost);
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return phost;
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}
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