lib/krb5/sock_principal.c

   1 /*
   2  * Copyright (c) 1997 - 2001 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. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 krb5_error_code KRB5_LIB_FUNCTION
  39 krb5_sock_to_principal (krb5_context context,
  40                         int sock,
  41                         const char *sname,
  42                         int32_t type,
  43                         krb5_principal *ret_princ)
  44 {
  45     krb5_error_code ret;
  46     struct sockaddr_storage __ss;
  47     struct sockaddr *sa = (struct sockaddr *)&__ss;
  48     socklen_t salen = sizeof(__ss);
  49     char hostname[NI_MAXHOST];
  50
  51     if (getsockname (sock, sa, &salen) < 0) {
  52         ret = errno;
  53         krb5_set_error_string (context, "getsockname: %s", strerror(ret));
  54         return ret;
  55     }
  56     ret = getnameinfo (sa, salen, hostname, sizeof(hostname), NULL, 0, 0);
  57     if (ret) {
  58         int save_errno = errno;
  59
  60         krb5_set_error_string (context, "getnameinfo: %s", gai_strerror(ret));
  61         return krb5_eai_to_heim_errno(ret, save_errno);
  62     }
  63
  64     ret = krb5_sname_to_principal (context,
  65                                    hostname,
  66                                    sname,
  67                                    type,
  68                                    ret_princ);
  69     return ret;
  70 }