lib/krb5/sock_principal.c

   1 /*
   2  * Copyright (c) 1997 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "krb5_locl.h"
  40
  41 RCSID("$Id$");
  42
  43 krb5_error_code
  44 krb5_sock_to_principal (krb5_context context,
  45                         int sock,
  46                         const char *sname,
  47                         int32_t type,
  48                         krb5_principal *ret_princ)
  49 {
  50     krb5_error_code ret;
  51 #if defined(AF_INET6) && defined(HAVE_SOCKADDR_IN6)
  52     struct sockaddr_in6 addr;
  53 #else
  54     struct sockaddr_in addr;
  55 #endif
  56     int len = sizeof(addr);
  57     struct hostent *hostent;
  58
  59     if (getsockname (sock, (struct sockaddr *)&addr, &len) < 0)
  60         return errno;
  61
  62 #if defined(AF_INET6) && defined(HAVE_SOCKADDR_IN6)
  63     if(len == sizeof(struct sockaddr_in6))
  64         hostent = gethostbyaddr ((const char *)&addr.sin6_addr,
  65                                  sizeof(addr.sin6_addr),
  66                                  addr.sin6_family);
  67     else {
  68         struct sockaddr_in *foo = (struct sockaddr_in *)&addr;
  69
  70         hostent = gethostbyaddr ((const char *)&foo->sin_addr,
  71                                  sizeof(foo->sin_addr),
  72                                  foo->sin_family);
  73     }
  74 #else
  75     hostent = gethostbyaddr ((const char *)&addr.sin_addr,
  76                              sizeof(addr.sin_addr),
  77                              addr.sin_family);
  78 #endif
  79
  80     if (hostent == NULL)
  81         return h_errno;
  82     return krb5_sname_to_principal (context,
  83                                     hostent->h_name,
  84                                     sname,
  85                                     type,
  86                                     ret_princ);
  87 }