1/* 2 * Copyright (c) 1999 - 2000 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: --- 19 unchanged lines hidden (view full) --- 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 |
36RCSID("$Id: expand_hostname.c,v 1.8 2000/02/20 02:25:29 assar Exp $"); |
37 38static krb5_error_code 39copy_hostname(krb5_context context, 40 const char *orig_hostname, 41 char **new_hostname) 42{ 43 *new_hostname = strdup (orig_hostname); 44 if (*new_hostname == NULL) --- 31 unchanged lines hidden (view full) --- 76 return 0; 77 } 78 } 79 freeaddrinfo (ai); 80 return copy_hostname (context, orig_hostname, new_hostname); 81} 82 83/* |
84 * handle the case of the hostname being unresolvable and thus identical 85 */ 86 87static krb5_error_code 88vanilla_hostname (krb5_context context, 89 const char *orig_hostname, 90 char **new_hostname, 91 char ***realms) 92{ 93 krb5_error_code ret; 94 95 ret = copy_hostname (context, orig_hostname, new_hostname); 96 if (ret) 97 return ret; 98 strlwr (*new_hostname); 99 100 ret = krb5_get_host_realm (context, *new_hostname, realms); 101 if (ret) { 102 free (*new_hostname); 103 return ret; 104 } 105 return 0; 106} 107 108/* |
109 * expand `hostname' to a name we believe to be a hostname in newly 110 * allocated space in `host' and return realms in `realms'. 111 */ 112 113krb5_error_code 114krb5_expand_hostname_realms (krb5_context context, 115 const char *orig_hostname, 116 char **new_hostname, 117 char ***realms) 118{ 119 struct addrinfo *ai, *a, hints; 120 int error; 121 krb5_error_code ret = 0; 122 123 memset (&hints, 0, sizeof(hints)); 124 hints.ai_flags = AI_CANONNAME; 125 126 error = getaddrinfo (orig_hostname, NULL, &hints, &ai); 127 if (error) |
128 return vanilla_hostname (context, orig_hostname, new_hostname, 129 realms); 130 |
131 for (a = ai; a != NULL; a = a->ai_next) { 132 if (a->ai_canonname != NULL) { 133 ret = copy_hostname (context, orig_hostname, new_hostname); |
134 if (ret) { 135 freeaddrinfo (ai); 136 return ret; 137 } |
138 strlwr (*new_hostname); 139 ret = krb5_get_host_realm (context, *new_hostname, realms); |
140 if (ret == 0) { 141 freeaddrinfo (ai); 142 return 0; 143 } |
144 free (*new_hostname); 145 } 146 } |
147 return vanilla_hostname (context, orig_hostname, new_hostname, realms); |
148} |