dlls/dnsapi/name.c

   1 /*
   2  * DNS support
   3  *
   4  * Copyright (C) 2006 Matthew Kehrer
   5  * Copyright (C) 2006 Hans Leidekker
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/debug.h"
  24 #include "wine/unicode.h"
  25
  26 #include <stdarg.h>
  27 #include <sys/types.h>
  28
  29 #ifdef HAVE_NETINET_IN_H
  30 # include <netinet/in.h>
  31 #endif
  32 #ifdef HAVE_ARPA_NAMESER_H
  33 # include <arpa/nameser.h>
  34 #endif
  35 #ifdef HAVE_RESOLV_H
  36 # include <resolv.h>
  37 #endif
  38
  39 #include "windef.h"
  40 #include "winbase.h"
  41 #include "winerror.h"
  42 #include "winnls.h"
  43 #include "windns.h"
  44
  45 #include "dnsapi.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
  48
  49 /******************************************************************************
  50  * DnsNameCompare_A               [DNSAPI.@]
  51  *
  52  */
  53 BOOL WINAPI DnsNameCompare_A( LPSTR name1, LPSTR name2 )
  54 {
  55     BOOL ret;
  56     LPWSTR name1W, name2W;
  57
  58     TRACE( "(%s,%s)\n", debugstr_a(name1), debugstr_a(name2) );
  59
  60     name1W = dns_strdup_aw( name1 );
  61     name2W = dns_strdup_aw( name2 );
  62
  63     ret = DnsNameCompare_W( name1W, name2W );
  64
  65     dns_free( name1W );
  66     dns_free( name2W );
  67
  68     return ret;
  69 }
  70
  71 /******************************************************************************
  72  * DnsNameCompare_W               [DNSAPI.@]
  73  *
  74  */
  75 BOOL WINAPI DnsNameCompare_W( LPWSTR name1, LPWSTR name2 )
  76 {
  77     WCHAR *p, *q;
  78
  79     TRACE( "(%s,%s)\n", debugstr_w(name1), debugstr_w(name2) );
  80
  81     if (!name1 && !name2) return TRUE;
  82     if (!name1 || !name2) return FALSE;
  83
  84     p = name1 + lstrlenW( name1 ) - 1;
  85     q = name2 + lstrlenW( name2 ) - 1;
  86
  87     while (*p == '.' && p >= name1) p--;
  88     while (*q == '.' && q >= name2) q--;
  89
  90     if (p - name1 != q - name2) return FALSE;
  91
  92     while (name1 <= p)
  93     {
  94         if (toupperW( *name1 ) != toupperW( *name2 ))
  95             return FALSE;
  96
  97         name1++;
  98         name2++;
  99     }
 100     return TRUE;
 101 }
 102
 103 /******************************************************************************
 104  * DnsValidateName_A              [DNSAPI.@]
 105  *
 106  */
 107 DNS_STATUS WINAPI DnsValidateName_A( LPCSTR name, DNS_NAME_FORMAT format )
 108 {
 109     LPWSTR nameW;
 110     DNS_STATUS ret;
 111
 112     TRACE( "(%s, %d)\n", debugstr_a(name), format );
 113
 114     nameW = dns_strdup_aw( name );
 115     ret = DnsValidateName_W( nameW, format );
 116
 117     dns_free( nameW );
 118     return ret;
 119 }
 120
 121 /******************************************************************************
 122  * DnsValidateName_UTF8           [DNSAPI.@]
 123  *
 124  */
 125 DNS_STATUS WINAPI DnsValidateName_UTF8( LPCSTR name, DNS_NAME_FORMAT format )
 126 {
 127     LPWSTR nameW;
 128     DNS_STATUS ret;
 129
 130     TRACE( "(%s, %d)\n", debugstr_a(name), format );
 131
 132     nameW = dns_strdup_uw( name );
 133     ret = DnsValidateName_W( nameW, format );
 134
 135     dns_free( nameW );
 136     return ret;
 137 }
 138
 139 #define HAS_EXTENDED        0x0001
 140 #define HAS_NUMERIC         0x0002
 141 #define HAS_NON_NUMERIC     0x0004
 142 #define HAS_DOT             0x0008
 143 #define HAS_DOT_DOT         0x0010
 144 #define HAS_SPACE           0x0020
 145 #define HAS_INVALID         0x0040
 146 #define HAS_ASTERISK        0x0080
 147 #define HAS_UNDERSCORE      0x0100
 148 #define HAS_LONG_LABEL      0x0200
 149
 150 /******************************************************************************
 151  * DnsValidateName_W              [DNSAPI.@]
 152  *
 153  */
 154 DNS_STATUS WINAPI DnsValidateName_W( LPCWSTR name, DNS_NAME_FORMAT format )
 155 {
 156     const WCHAR *p;
 157     unsigned int i, j, state = 0;
 158     static const WCHAR invalid[] = {
 159         '{','|','}','~','[','\\',']','^','\'',':',';','<','=','>',
 160         '?','@','!','\"','#','$','%','^','`','(',')','+','/',',',0 };
 161
 162     TRACE( "(%s, %d)\n", debugstr_w(name), format );
 163
 164     if (!name) return ERROR_INVALID_NAME;
 165
 166     for (p = name, i = 0, j = 0; *p; p++, i++, j++)
 167     {
 168         if (*p == '.')
 169         {
 170             j = 0;
 171             state |= HAS_DOT;
 172             if (p[1] == '.') state |= HAS_DOT_DOT;
 173         }
 174         else if (*p < '0' || *p > '9') state |= HAS_NON_NUMERIC;
 175         else state |= HAS_NUMERIC;
 176
 177         if (j > 62) state |= HAS_LONG_LABEL;
 178
 179         if (strchrW( invalid, *p )) state |= HAS_INVALID;
 180         else if ((unsigned)*p > 127) state |= HAS_EXTENDED;
 181         else if (*p == ' ') state |= HAS_SPACE;
 182         else if (*p == '_') state |= HAS_UNDERSCORE;
 183         else if (*p == '*') state |= HAS_ASTERISK;
 184     }
 185
 186     if (i == 0 || i > 255 ||
 187         (state & HAS_LONG_LABEL) ||
 188         (state & HAS_DOT_DOT) ||
 189         (name[0] == '.' && name[1])) return ERROR_INVALID_NAME;
 190
 191     switch (format)
 192     {
 193     case DnsNameDomain:
 194     {
 195         if (!(state & HAS_NON_NUMERIC) && (state & HAS_NUMERIC))
 196             return DNS_ERROR_NUMERIC_NAME;
 197         if ((state & HAS_EXTENDED) || (state & HAS_UNDERSCORE))
 198             return DNS_ERROR_NON_RFC_NAME;
 199         if ((state & HAS_SPACE) ||
 200             (state & HAS_INVALID) ||
 201             (state & HAS_ASTERISK)) return DNS_ERROR_INVALID_NAME_CHAR;
 202         break;
 203     }
 204     case DnsNameDomainLabel:
 205     {
 206         if (state & HAS_DOT) return ERROR_INVALID_NAME;
 207         if ((state & HAS_EXTENDED) || (state & HAS_UNDERSCORE))
 208             return DNS_ERROR_NON_RFC_NAME;
 209         if ((state & HAS_SPACE) ||
 210             (state & HAS_INVALID) ||
 211             (state & HAS_ASTERISK)) return DNS_ERROR_INVALID_NAME_CHAR;
 212         break;
 213     }
 214     case DnsNameHostnameFull:
 215     {
 216         if (!(state & HAS_NON_NUMERIC) && (state & HAS_NUMERIC))
 217             return DNS_ERROR_NUMERIC_NAME;
 218         if ((state & HAS_EXTENDED) || (state & HAS_UNDERSCORE))
 219             return DNS_ERROR_NON_RFC_NAME;
 220         if ((state & HAS_SPACE) ||
 221             (state & HAS_INVALID) ||
 222             (state & HAS_ASTERISK)) return DNS_ERROR_INVALID_NAME_CHAR;
 223         break;
 224     }
 225     case DnsNameHostnameLabel:
 226     {
 227         if (state & HAS_DOT) return ERROR_INVALID_NAME;
 228         if (!(state & HAS_NON_NUMERIC) && (state & HAS_NUMERIC))
 229             return DNS_ERROR_NUMERIC_NAME;
 230         if ((state & HAS_EXTENDED) || (state & HAS_UNDERSCORE))
 231             return DNS_ERROR_NON_RFC_NAME;
 232         if ((state & HAS_SPACE) ||
 233             (state & HAS_INVALID) ||
 234             (state & HAS_ASTERISK)) return DNS_ERROR_INVALID_NAME_CHAR;
 235         break;
 236     }
 237     case DnsNameWildcard:
 238     {
 239         if (!(state & HAS_NON_NUMERIC) && (state & HAS_NUMERIC))
 240             return ERROR_INVALID_NAME;
 241         if (name[0] != '*') return ERROR_INVALID_NAME;
 242         if (name[1] && name[1] != '.')
 243             return DNS_ERROR_INVALID_NAME_CHAR;
 244         if ((state & HAS_EXTENDED) ||
 245             (state & HAS_SPACE) ||
 246             (state & HAS_INVALID)) return ERROR_INVALID_NAME;
 247         break;
 248     }
 249     case DnsNameSrvRecord:
 250     {
 251         if (!(state & HAS_NON_NUMERIC) && (state & HAS_NUMERIC))
 252             return ERROR_INVALID_NAME;
 253         if (name[0] != '_') return ERROR_INVALID_NAME;
 254         if ((state & HAS_UNDERSCORE) && !name[1])
 255             return DNS_ERROR_NON_RFC_NAME;
 256         if ((state & HAS_EXTENDED) ||
 257             (state & HAS_SPACE) ||
 258             (state & HAS_INVALID)) return ERROR_INVALID_NAME;
 259         break;
 260     }
 261     default:
 262         WARN( "unknown format: %d\n", format );
 263         break;
 264     }
 265     return ERROR_SUCCESS;
 266 }