1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 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: sock_principal.c,v 1.13 2001/05/14 06:14:51 assar Exp $"); 37 38 krb5_error_code 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 krb5_address address; 47 struct sockaddr_storage __ss; 48 struct sockaddr *sa = (struct sockaddr *)&__ss; 49 socklen_t len = sizeof(__ss); 50 struct hostent *hostent; 51 int family; 52 char *hname = NULL; 53 54 if (getsockname (sock, sa, &len) < 0) { 55 ret = errno; 56 krb5_set_error_string (context, "getsockname: %s", strerror(ret)); 57 return ret; 58 } 59 family = sa->sa_family; 60 61 ret = krb5_sockaddr2address (context, sa, &address); 62 if (ret) 63 return ret; 64 65 hostent = roken_gethostbyaddr (address.address.data, 66 address.address.length, 67 family); 68 69 if (hostent == NULL) { 70 krb5_set_error_string (context, "gethostbyaddr: %s", 71 hstrerror(h_errno)); 72 return krb5_h_errno_to_heim_errno(h_errno); 73 } 74 hname = hostent->h_name; 75 if (strchr(hname, '.') == NULL) { 76 char **a; 77 78 for (a = hostent->h_aliases; a != NULL && *a != NULL; ++a) 79 if (strchr(*a, '.') != NULL) { 80 hname = *a; 81 break; 82 } 83 } 84 85 return krb5_sname_to_principal (context, 86 hname, 87 sname, 88 type, 89 ret_princ); 90 } 91