| File: | xdm/access.c |
| Location: | line 316, column 9 |
| Description: | Result of 'malloc' is converted to a pointer of type 'HostEntry', which is incompatible with sizeof operand type 'DisplayEntry' |
| 1 | /* |
| 2 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 21 | * DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | /* |
| 24 | * |
| 25 | Copyright 1990, 1998 The Open Group |
| 26 | |
| 27 | Permission to use, copy, modify, distribute, and sell this software and its |
| 28 | documentation for any purpose is hereby granted without fee, provided that |
| 29 | the above copyright notice appear in all copies and that both that |
| 30 | copyright notice and this permission notice appear in supporting |
| 31 | documentation. |
| 32 | |
| 33 | The above copyright notice and this permission notice shall be included in |
| 34 | all copies or substantial portions of the Software. |
| 35 | |
| 36 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 37 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 38 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 39 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 40 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 41 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 42 | |
| 43 | Except as contained in this notice, the name of a copyright holder shall not be |
| 44 | used in advertising or otherwise to promote the sale, use or other dealings |
| 45 | in this Software without prior written authorization from the copyright holder. |
| 46 | * |
| 47 | * Author: Keith Packard, MIT X Consortium |
| 48 | */ |
| 49 | |
| 50 | |
| 51 | /* |
| 52 | * Access control for XDMCP - keep a database of allowable display addresses |
| 53 | * and (potentially) a list of hosts to send ForwardQuery packets to |
| 54 | */ |
| 55 | |
| 56 | #include "dm.h" |
| 57 | #include "dm_error.h" |
| 58 | |
| 59 | #ifdef XDMCP |
| 60 | |
| 61 | # include <X11/Xos.h> |
| 62 | # include <X11/Xdmcp.h> |
| 63 | # include <X11/X.h> |
| 64 | # include <stdio.h> |
| 65 | # include <ctype.h> |
| 66 | |
| 67 | # include "dm_socket.h" |
| 68 | |
| 69 | # include <netdb.h> |
| 70 | |
| 71 | # if defined(IPv61) && defined(AF_INET630) |
| 72 | # include <arpa/inet.h> |
| 73 | # endif |
| 74 | |
| 75 | # define ALIAS_CHARACTER'%' '%' |
| 76 | # define NEGATE_CHARACTER'!' '!' |
| 77 | # define CHOOSER_STRING"CHOOSER" "CHOOSER" |
| 78 | # define BROADCAST_STRING"BROADCAST" "BROADCAST" |
| 79 | # define NOBROADCAST_STRING"NOBROADCAST" "NOBROADCAST" |
| 80 | # define LISTEN_STRING"LISTEN" "LISTEN" |
| 81 | # define WILDCARD_STRING"*" "*" |
| 82 | |
| 83 | # define HOST_ALIAS0 0 |
| 84 | # define HOST_ADDRESS1 1 |
| 85 | # define HOST_BROADCAST2 2 |
| 86 | # define HOST_CHOOSER3 3 |
| 87 | # define HOST_NOBROADCAST4 4 |
| 88 | # define HOST_ANYADDR5 5 |
| 89 | |
| 90 | typedef struct _hostEntry { |
| 91 | struct _hostEntry *next; |
| 92 | int type; |
| 93 | union _hostOrAlias { |
| 94 | char *aliasName; |
| 95 | ARRAY8 hostAddress; |
| 96 | } entry; |
| 97 | int hopCount; |
| 98 | } HostEntry; |
| 99 | |
| 100 | # define DISPLAY_ALIAS0 0 |
| 101 | # define DISPLAY_PATTERN1 1 |
| 102 | # define DISPLAY_ADDRESS2 2 |
| 103 | # define DISPLAY_LISTEN3 3 |
| 104 | |
| 105 | typedef struct _displayEntry { |
| 106 | struct _displayEntry *next; |
| 107 | int type; |
| 108 | int notAllowed; |
| 109 | int notBroadcast; |
| 110 | int chooser; |
| 111 | union _displayType { |
| 112 | char *aliasName; |
| 113 | char *displayPattern; |
| 114 | struct _display { |
| 115 | ARRAY8 clientAddress; |
| 116 | CARD16 connectionType; |
| 117 | } displayAddress; |
| 118 | } entry; |
| 119 | HostEntry *hosts; |
| 120 | } DisplayEntry; |
| 121 | |
| 122 | static DisplayEntry *database; |
| 123 | |
| 124 | ARRAY8Ptr |
| 125 | getLocalAddress (void) |
| 126 | { |
| 127 | static ARRAY8 localAddress; |
| 128 | static int haveLocalAddress; |
| 129 | |
| 130 | if (!haveLocalAddress) |
| 131 | { |
| 132 | # if defined(IPv61) && defined(AF_INET630) |
| 133 | struct addrinfo *ai; |
| 134 | |
| 135 | if (getaddrinfo(localHostname(), NULL((void*)0), NULL((void*)0), &ai) != 0) { |
| 136 | if (XdmcpAllocARRAY8 (&localAddress, 4)) { |
| 137 | localAddress.data[0] = 127; |
| 138 | localAddress.data[1] = 0; |
| 139 | localAddress.data[2] = 0; |
| 140 | localAddress.data[3] = 1; |
| 141 | haveLocalAddress = 1; |
| 142 | } |
| 143 | } else { |
| 144 | if (ai->ai_addr->sa_family == AF_INET2) { |
| 145 | if (XdmcpAllocARRAY8 (&localAddress, sizeof(struct in_addr))) { |
| 146 | memcpy(localAddress.data,__builtin___memcpy_chk (localAddress.data, &((struct sockaddr_in *)ai->ai_addr)->sin_addr, sizeof(struct in_addr), __builtin_object_size (localAddress.data, 0)) |
| 147 | &((struct sockaddr_in *)ai->ai_addr)->sin_addr,__builtin___memcpy_chk (localAddress.data, &((struct sockaddr_in *)ai->ai_addr)->sin_addr, sizeof(struct in_addr), __builtin_object_size (localAddress.data, 0)) |
| 148 | sizeof(struct in_addr))__builtin___memcpy_chk (localAddress.data, &((struct sockaddr_in *)ai->ai_addr)->sin_addr, sizeof(struct in_addr), __builtin_object_size (localAddress.data, 0)); |
| 149 | haveLocalAddress = 1; |
| 150 | } |
| 151 | } else if (ai->ai_addr->sa_family == AF_INET630) { |
| 152 | if (XdmcpAllocARRAY8 (&localAddress, sizeof(struct in6_addr))) |
| 153 | { |
| 154 | memcpy(localAddress.data,__builtin___memcpy_chk (localAddress.data, &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr, sizeof(struct in6_addr), __builtin_object_size (localAddress.data, 0)) |
| 155 | &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr,__builtin___memcpy_chk (localAddress.data, &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr, sizeof(struct in6_addr), __builtin_object_size (localAddress.data, 0)) |
| 156 | sizeof(struct in6_addr))__builtin___memcpy_chk (localAddress.data, &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr, sizeof(struct in6_addr), __builtin_object_size (localAddress.data, 0)); |
| 157 | haveLocalAddress = 1; |
| 158 | } |
| 159 | } |
| 160 | freeaddrinfo(ai); |
| 161 | } |
| 162 | # else |
| 163 | struct hostent *hostent; |
| 164 | |
| 165 | hostent = gethostbyname (localHostname()); |
| 166 | if (hostent != NULL((void*)0)) { |
| 167 | if (XdmcpAllocARRAY8 (&localAddress, hostent->h_length)) { |
| 168 | memmove(localAddress.data, hostent->h_addr, hostent->h_length)__builtin___memmove_chk (localAddress.data, hostent->h_addr_list [0], hostent->h_length, __builtin_object_size (localAddress .data, 0)); |
| 169 | haveLocalAddress = 1; |
| 170 | } |
| 171 | } else { |
| 172 | /* Assume 127.0.0.1 */ |
| 173 | if (XdmcpAllocARRAY8 (&localAddress, 4)) { |
| 174 | localAddress.data[0] = 127; |
| 175 | localAddress.data[1] = 0; |
| 176 | localAddress.data[2] = 0; |
| 177 | localAddress.data[3] = 1; |
| 178 | haveLocalAddress = 1; |
| 179 | } |
| 180 | } |
| 181 | # endif |
| 182 | |
| 183 | } |
| 184 | return &localAddress; |
| 185 | } |
| 186 | |
| 187 | static void |
| 188 | FreeHostEntry (HostEntry *h) |
| 189 | { |
| 190 | switch (h->type) { |
| 191 | case HOST_ALIAS0: |
| 192 | free (h->entry.aliasName); |
| 193 | break; |
| 194 | case HOST_ADDRESS1: |
| 195 | XdmcpDisposeARRAY8 (&h->entry.hostAddress); |
| 196 | break; |
| 197 | case HOST_CHOOSER3: |
| 198 | break; |
| 199 | } |
| 200 | free (h); |
| 201 | } |
| 202 | |
| 203 | static void |
| 204 | FreeDisplayEntry (DisplayEntry *d) |
| 205 | { |
| 206 | HostEntry *h, *next; |
| 207 | switch (d->type) { |
| 208 | case DISPLAY_ALIAS0: |
| 209 | free (d->entry.aliasName); |
| 210 | break; |
| 211 | case DISPLAY_PATTERN1: |
| 212 | free (d->entry.displayPattern); |
| 213 | break; |
| 214 | case DISPLAY_ADDRESS2: |
| 215 | XdmcpDisposeARRAY8 (&d->entry.displayAddress.clientAddress); |
| 216 | break; |
| 217 | case DISPLAY_LISTEN3: |
| 218 | /* do nothing - this case doesn't use the d->entry union */ |
| 219 | break; |
| 220 | } |
| 221 | for (h = d->hosts; h; h = next) { |
| 222 | next = h->next; |
| 223 | FreeHostEntry (h); |
| 224 | } |
| 225 | free (d); |
| 226 | } |
| 227 | |
| 228 | static void |
| 229 | FreeAccessDatabase (void) |
| 230 | { |
| 231 | DisplayEntry *d, *next; |
| 232 | |
| 233 | for (d = database; d; d = next) |
| 234 | { |
| 235 | next = d->next; |
| 236 | FreeDisplayEntry (d); |
| 237 | } |
| 238 | database = NULL((void*)0); |
| 239 | } |
| 240 | |
| 241 | # define WORD_LEN256 256 |
| 242 | static char wordBuffer[WORD_LEN256]; |
| 243 | static int nextIsEOF; |
| 244 | |
| 245 | static char * |
| 246 | ReadWord (FILE *file, int EOFatEOL) |
| 247 | { |
| 248 | int c; |
| 249 | char *wordp; |
| 250 | int quoted; |
| 251 | |
| 252 | wordp = wordBuffer; |
| 253 | if (nextIsEOF) |
| 254 | { |
| 255 | nextIsEOF = FALSE0; |
| 256 | return NULL((void*)0); |
| 257 | } |
| 258 | quoted = FALSE0; |
| 259 | for (;wordp - wordBuffer < sizeof(wordBuffer)-2;) { |
| 260 | c = getc (file); |
| 261 | switch (c) { |
| 262 | case '#': |
| 263 | if (quoted) |
| 264 | { |
| 265 | *wordp++ = c; |
| 266 | break; |
| 267 | } |
| 268 | while ((c = getc (file)) != EOF(-1) && c != '\n') |
| 269 | ; |
| 270 | case '\n': |
| 271 | case EOF(-1): |
| 272 | if (c == EOF(-1) || (EOFatEOL && !quoted)) |
| 273 | { |
| 274 | ungetc (c, file); |
| 275 | if (wordp == wordBuffer) |
| 276 | return NULL((void*)0); |
| 277 | *wordp = '\0'; |
| 278 | nextIsEOF = TRUE1; |
| 279 | return wordBuffer; |
| 280 | } |
| 281 | case ' ': |
| 282 | case '\t': |
| 283 | if (wordp != wordBuffer) |
| 284 | { |
| 285 | ungetc (c, file); |
| 286 | *wordp = '\0'; |
| 287 | return wordBuffer; |
| 288 | } |
| 289 | break; |
| 290 | case '\\': |
| 291 | if (!quoted) |
| 292 | { |
| 293 | quoted = TRUE1; |
| 294 | continue; |
| 295 | } |
| 296 | default: |
| 297 | if (wordp < &(wordBuffer[WORD_LEN256])) |
| 298 | *wordp++ = c; |
| 299 | break; |
| 300 | } |
| 301 | quoted = FALSE0; |
| 302 | } |
| 303 | return NULL((void*)0); |
| 304 | } |
| 305 | |
| 306 | static HostEntry * |
| 307 | ReadHostEntry (FILE *file) |
| 308 | { |
| 309 | char *hostOrAlias; |
| 310 | HostEntry *h; |
| 311 | |
| 312 | tryagain: |
| 313 | hostOrAlias = ReadWord (file, TRUE1); |
| 314 | if (!hostOrAlias) |
| 315 | return NULL((void*)0); |
| 316 | h = malloc (sizeof (DisplayEntry)); |
Result of 'malloc' is converted to a pointer of type 'HostEntry', which is incompatible with sizeof operand type 'DisplayEntry' | |
| 317 | if (!h) |
| 318 | { |
| 319 | LogOutOfMem ("ReadHostEntry: DisplayEntry\n"); |
| 320 | return NULL((void*)0); |
| 321 | } |
| 322 | h->hopCount = 1; |
| 323 | if (*hostOrAlias == ALIAS_CHARACTER'%') |
| 324 | { |
| 325 | h->type = HOST_ALIAS0; |
| 326 | h->entry.aliasName = strdup (hostOrAlias); |
| 327 | if (!h->entry.aliasName) { |
| 328 | free (h); |
| 329 | return NULL((void*)0); |
| 330 | } |
| 331 | } |
| 332 | else if (!strcmp (hostOrAlias, CHOOSER_STRING"CHOOSER")) |
| 333 | { |
| 334 | h->type = HOST_CHOOSER3; |
| 335 | } |
| 336 | else if (!strcmp (hostOrAlias, BROADCAST_STRING"BROADCAST")) |
| 337 | { |
| 338 | h->type = HOST_BROADCAST2; |
| 339 | } |
| 340 | else if (!strcmp (hostOrAlias, NOBROADCAST_STRING"NOBROADCAST")) |
| 341 | { |
| 342 | h->type = HOST_NOBROADCAST4; |
| 343 | } |
| 344 | else if (!strcmp (hostOrAlias, WILDCARD_STRING"*")) |
| 345 | { |
| 346 | h->type = HOST_ANYADDR5; |
| 347 | h->entry.hostAddress.length = 0; |
| 348 | } |
| 349 | else |
| 350 | { |
| 351 | void *addr=NULL((void*)0); |
| 352 | size_t addr_length=0; |
| 353 | # if defined(IPv61) && defined(AF_INET630) |
| 354 | struct addrinfo *ai = NULL((void*)0); |
| 355 | # else |
| 356 | struct hostent *hostent = gethostbyname (hostOrAlias); |
| 357 | # endif |
| 358 | char *hops = strrchr(hostOrAlias, '/'); |
| 359 | |
| 360 | if (hops) { |
| 361 | *(hops++) = '\0'; |
| 362 | h->hopCount = strtol(hops, NULL((void*)0), 10); |
| 363 | if (h->hopCount < 1) |
| 364 | h->hopCount = 1; |
| 365 | } |
| 366 | |
| 367 | # if defined(IPv61) && defined(AF_INET630) |
| 368 | if (getaddrinfo(hostOrAlias, NULL((void*)0), NULL((void*)0), &ai) == 0) { |
| 369 | if (ai->ai_addr->sa_family == AF_INET2) { |
| 370 | addr = &((struct sockaddr_in *)ai->ai_addr)->sin_addr; |
| 371 | addr_length = sizeof(struct in_addr); |
| 372 | } else if (ai->ai_addr->sa_family == AF_INET630) { |
| 373 | addr = &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr; |
| 374 | addr_length = sizeof(struct in6_addr); |
| 375 | } |
| 376 | } |
| 377 | # else |
| 378 | if (hostent) { |
| 379 | addr = hostent->h_addrh_addr_list[0]; |
| 380 | addr_length = hostent->h_length; |
| 381 | } |
| 382 | # endif |
| 383 | h->type = HOST_ADDRESS1; |
| 384 | |
| 385 | if (!addr) |
| 386 | { |
| 387 | Debug ("No such host %s\n", hostOrAlias); |
| 388 | LogError ("Access file \"%s\", host \"%s\" not found\n", accessFile, hostOrAlias); |
| 389 | free (h); |
| 390 | # if defined(IPv61) && defined(AF_INET630) |
| 391 | if (ai) |
| 392 | freeaddrinfo(ai); |
| 393 | # endif |
| 394 | goto tryagain; |
| 395 | } |
| 396 | if (!XdmcpAllocARRAY8 (&h->entry.hostAddress, addr_length)) |
| 397 | { |
| 398 | LogOutOfMem ("ReadHostEntry\n"); |
| 399 | free (h); |
| 400 | # if defined(IPv61) && defined(AF_INET630) |
| 401 | if (ai) |
| 402 | freeaddrinfo(ai); |
| 403 | # endif |
| 404 | return NULL((void*)0); |
| 405 | } |
| 406 | memmove( h->entry.hostAddress.data, addr, addr_length)__builtin___memmove_chk (h->entry.hostAddress.data, addr, addr_length , __builtin_object_size (h->entry.hostAddress.data, 0)); |
| 407 | # if defined(IPv61) && defined(AF_INET630) |
| 408 | if (ai) |
| 409 | freeaddrinfo(ai); |
| 410 | # endif |
| 411 | } |
| 412 | return h; |
| 413 | } |
| 414 | |
| 415 | static int |
| 416 | HasGlobCharacters (char *s) |
| 417 | { |
| 418 | for (;;) |
| 419 | switch (*s++) { |
| 420 | case '?': |
| 421 | case '*': |
| 422 | return 1; |
| 423 | case '\0': |
| 424 | return 0; |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | static DisplayEntry * |
| 429 | ReadDisplayEntry (FILE *file) |
| 430 | { |
| 431 | char *displayOrAlias; |
| 432 | DisplayEntry *d; |
| 433 | struct _display *display; |
| 434 | HostEntry *h, **prev; |
| 435 | |
| 436 | tryagain: |
| 437 | displayOrAlias = ReadWord (file, FALSE0); |
| 438 | if (!displayOrAlias) |
| 439 | return NULL((void*)0); |
| 440 | d = malloc (sizeof (DisplayEntry)); |
| 441 | if (!d) |
| 442 | { |
| 443 | LogOutOfMem ("ReadDisplayEntry: DisplayEntry\n"); |
| 444 | return NULL((void*)0); |
| 445 | } |
| 446 | d->notAllowed = 0; |
| 447 | d->notBroadcast = 0; |
| 448 | d->chooser = 0; |
| 449 | if (*displayOrAlias == ALIAS_CHARACTER'%') |
| 450 | { |
| 451 | d->type = DISPLAY_ALIAS0; |
| 452 | d->entry.aliasName = strdup (displayOrAlias); |
| 453 | if (!d->entry.aliasName) |
| 454 | { |
| 455 | free (d); |
| 456 | return NULL((void*)0); |
| 457 | } |
| 458 | } |
| 459 | else if (!strcmp(displayOrAlias, LISTEN_STRING"LISTEN")) |
| 460 | { |
| 461 | d->type = DISPLAY_LISTEN3; |
| 462 | } |
| 463 | else |
| 464 | { |
| 465 | if (*displayOrAlias == NEGATE_CHARACTER'!') |
| 466 | { |
| 467 | d->notAllowed = 1; |
| 468 | ++displayOrAlias; |
| 469 | } |
| 470 | if (HasGlobCharacters (displayOrAlias)) |
| 471 | { |
| 472 | d->type = DISPLAY_PATTERN1; |
| 473 | d->entry.displayPattern = strdup (displayOrAlias); |
| 474 | if (!d->entry.displayPattern) |
| 475 | { |
| 476 | free (d); |
| 477 | return NULL((void*)0); |
| 478 | } |
| 479 | } |
| 480 | else |
| 481 | { |
| 482 | void *addr = NULL((void*)0); |
| 483 | size_t addr_length = 0; |
| 484 | int addrtype = 0; |
| 485 | |
| 486 | # if defined(IPv61) && defined(AF_INET630) |
| 487 | struct addrinfo *ai = NULL((void*)0); |
| 488 | |
| 489 | if (getaddrinfo(displayOrAlias, NULL((void*)0), NULL((void*)0), &ai) == 0) { |
| 490 | addrtype = ai->ai_addr->sa_family; |
| 491 | if (addrtype == AF_INET2) { |
| 492 | addr = &((struct sockaddr_in *)ai->ai_addr)->sin_addr; |
| 493 | addr_length = sizeof(struct in_addr); |
| 494 | } else if (addrtype == AF_INET630) { |
| 495 | addr = &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr; |
| 496 | addr_length = sizeof(struct in6_addr); |
| 497 | } |
| 498 | } |
| 499 | # else |
| 500 | struct hostent *hostent; |
| 501 | |
| 502 | if ((hostent = gethostbyname (displayOrAlias)) != NULL((void*)0)) |
| 503 | { |
| 504 | Debug("ReadDisplayEntry: %s\n", displayOrAlias); |
| 505 | addr = hostent->h_addrh_addr_list[0]; |
| 506 | addrtype = hostent->h_addrtype; |
| 507 | addr_length = hostent->h_length; |
| 508 | } |
| 509 | # endif |
| 510 | if (addr == NULL((void*)0)) |
| 511 | { |
| 512 | LogError ("Access file %s, display %s unknown\n", accessFile, displayOrAlias); |
| 513 | free (d); |
| 514 | # if defined(IPv61) && defined(AF_INET630) |
| 515 | if (ai) |
| 516 | freeaddrinfo(ai); |
| 517 | # endif |
| 518 | goto tryagain; |
| 519 | } |
| 520 | d->type = DISPLAY_ADDRESS2; |
| 521 | display = &d->entry.displayAddress; |
| 522 | if (!XdmcpAllocARRAY8 (&display->clientAddress, addr_length)) |
| 523 | { |
| 524 | free (d); |
| 525 | # if defined(IPv61) && defined(AF_INET630) |
| 526 | if (ai) |
| 527 | freeaddrinfo(ai); |
| 528 | # endif |
| 529 | return NULL((void*)0); |
| 530 | } |
| 531 | memmove( display->clientAddress.data, addr, addr_length)__builtin___memmove_chk (display->clientAddress.data, addr , addr_length, __builtin_object_size (display->clientAddress .data, 0)); |
| 532 | # if defined(IPv61) && defined(AF_INET630) |
| 533 | if (ai) |
| 534 | freeaddrinfo(ai); |
| 535 | # endif |
| 536 | switch (addrtype) |
| 537 | { |
| 538 | # ifdef AF_UNIX1 |
| 539 | case AF_UNIX1: |
| 540 | display->connectionType = FamilyLocal(256); |
| 541 | break; |
| 542 | # endif |
| 543 | # ifdef AF_INET2 |
| 544 | case AF_INET2: |
| 545 | display->connectionType = FamilyInternet0; |
| 546 | break; |
| 547 | # endif |
| 548 | # if defined(IPv61) && defined(AF_INET630) |
| 549 | case AF_INET630: |
| 550 | display->connectionType = FamilyInternet66; |
| 551 | break; |
| 552 | # endif |
| 553 | # ifdef AF_DECnet12 |
| 554 | case AF_DECnet12: |
| 555 | display->connectionType = FamilyDECnet1; |
| 556 | break; |
| 557 | # endif |
| 558 | default: |
| 559 | display->connectionType = FamilyLocal(256); |
| 560 | break; |
| 561 | } |
| 562 | } |
| 563 | } |
| 564 | prev = &d->hosts; |
| 565 | while ((h = ReadHostEntry (file))) |
| 566 | { |
| 567 | if (h->type == HOST_CHOOSER3) |
| 568 | { |
| 569 | FreeHostEntry (h); |
| 570 | d->chooser = 1; |
| 571 | } else if (h->type == HOST_NOBROADCAST4) { |
| 572 | FreeHostEntry (h); |
| 573 | d->notBroadcast = 1; |
| 574 | } else if (h->type == HOST_ANYADDR5) { |
| 575 | if (d->type == DISPLAY_LISTEN3) { |
| 576 | *prev = h; |
| 577 | prev = &h->next; |
| 578 | } else { |
| 579 | Debug("Wildcard host specified in Xaccess for type other than LISTEN -- ignoring\n"); |
| 580 | FreeHostEntry (h); |
| 581 | } |
| 582 | } else { |
| 583 | *prev = h; |
| 584 | prev = &h->next; |
| 585 | } |
| 586 | } |
| 587 | *prev = NULL((void*)0); |
| 588 | return d; |
| 589 | } |
| 590 | |
| 591 | static void |
| 592 | ReadAccessDatabase (FILE *file) |
| 593 | { |
| 594 | DisplayEntry *d, **prev; |
| 595 | |
| 596 | prev = &database; |
| 597 | while ((d = ReadDisplayEntry (file))) |
| 598 | { |
| 599 | *prev = d; |
| 600 | prev = &d->next; |
| 601 | } |
| 602 | *prev = NULL((void*)0); |
| 603 | } |
| 604 | |
| 605 | int |
| 606 | ScanAccessDatabase (void) |
| 607 | { |
| 608 | FILE *datafile; |
| 609 | |
| 610 | FreeAccessDatabase (); |
| 611 | if (*accessFile) |
| 612 | { |
| 613 | datafile = fopen (accessFile, "r"); |
| 614 | if (!datafile) |
| 615 | { |
| 616 | LogError ("Cannot open access control file %s, no XDMCP reqeusts will be granted\n", accessFile); |
| 617 | return 0; |
| 618 | } |
| 619 | ReadAccessDatabase (datafile); |
| 620 | fclose (datafile); |
| 621 | } |
| 622 | return 1; |
| 623 | } |
| 624 | |
| 625 | /* |
| 626 | * calls the given function for each valid indirect entry. Returns TRUE if |
| 627 | * the local host exists on any of the lists, else FALSE |
| 628 | */ |
| 629 | |
| 630 | # define MAX_DEPTH32 32 |
| 631 | |
| 632 | static int indirectAlias ( |
| 633 | char *alias, |
| 634 | ARRAY8Ptr clientAddress, |
| 635 | CARD16 connectionType, |
| 636 | ChooserFunc function, |
| 637 | char *closure, |
| 638 | int depth, |
| 639 | int broadcast); |
| 640 | |
| 641 | |
| 642 | static int |
| 643 | scanHostlist ( |
| 644 | HostEntry *h, |
| 645 | ARRAY8Ptr clientAddress, |
| 646 | CARD16 connectionType, |
| 647 | ChooserFunc function, |
| 648 | char *closure, |
| 649 | int depth, |
| 650 | int broadcast) |
| 651 | { |
| 652 | int haveLocalhost = 0; |
| 653 | |
| 654 | for (; h; h = h->next) |
| 655 | { |
| 656 | switch (h->type) { |
| 657 | case HOST_ALIAS0: |
| 658 | if (indirectAlias (h->entry.aliasName, clientAddress, |
| 659 | connectionType, function, closure, depth, |
| 660 | broadcast)) |
| 661 | haveLocalhost = 1; |
| 662 | break; |
| 663 | case HOST_ADDRESS1: |
| 664 | if (XdmcpARRAY8Equal (getLocalAddress(), &h->entry.hostAddress)) |
| 665 | haveLocalhost = 1; |
| 666 | else if (function) |
| 667 | (*function) (connectionType, &h->entry.hostAddress, closure); |
| 668 | break; |
| 669 | case HOST_BROADCAST2: |
| 670 | if (broadcast) |
| 671 | { |
| 672 | ARRAY8 temp; |
| 673 | |
| 674 | if (function) |
| 675 | { |
| 676 | temp.data = (BYTE *) BROADCAST_STRING"BROADCAST"; |
| 677 | temp.length = strlen ((char *)temp.data); |
| 678 | (*function) (connectionType, &temp, closure); |
| 679 | } |
| 680 | } |
| 681 | break; |
| 682 | } |
| 683 | } |
| 684 | return haveLocalhost; |
| 685 | } |
| 686 | |
| 687 | /* Returns non-0 iff string is matched by pattern. Does case folding. |
| 688 | */ |
| 689 | static int |
| 690 | patternMatch (const char *string, char *pattern) |
| 691 | { |
| 692 | int p, s; |
| 693 | |
| 694 | if (!string) |
| 695 | string = ""; |
| 696 | |
| 697 | for (;;) |
| 698 | { |
| 699 | s = *string++; |
| 700 | switch (p = *pattern++) { |
| 701 | case '*': |
| 702 | if (!*pattern) |
| 703 | return 1; |
| 704 | for (string--; *string; string++) |
| 705 | if (patternMatch (string, pattern)) |
| 706 | return 1; |
| 707 | return 0; |
| 708 | case '?': |
| 709 | if (s == '\0') |
| 710 | return 0; |
| 711 | break; |
| 712 | case '\0': |
| 713 | return s == '\0'; |
| 714 | case '\\': |
| 715 | p = *pattern++; |
| 716 | /* fall through */ |
| 717 | default: |
| 718 | if (isupper(p)) p = tolower(p); |
| 719 | if (isupper(s)) s = tolower(s); |
| 720 | if (p != s) |
| 721 | return 0; |
| 722 | } |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | static int |
| 727 | indirectAlias ( |
| 728 | char *alias, |
| 729 | ARRAY8Ptr clientAddress, |
| 730 | CARD16 connectionType, |
| 731 | ChooserFunc function, |
| 732 | char *closure, |
| 733 | int depth, |
| 734 | int broadcast) |
| 735 | { |
| 736 | DisplayEntry *d; |
| 737 | int haveLocalhost = 0; |
| 738 | |
| 739 | if (depth == MAX_DEPTH32) |
| 740 | return 0; |
| 741 | for (d = database; d; d = d->next) |
| 742 | { |
| 743 | if (d->type != DISPLAY_ALIAS0 || !patternMatch (alias, d->entry.aliasName)) |
| 744 | continue; |
| 745 | if (scanHostlist (d->hosts, clientAddress, connectionType, |
| 746 | function, closure, depth + 1, broadcast)) |
| 747 | { |
| 748 | haveLocalhost = 1; |
| 749 | } |
| 750 | } |
| 751 | return haveLocalhost; |
| 752 | } |
| 753 | |
| 754 | int ForEachMatchingIndirectHost ( |
| 755 | ARRAY8Ptr clientAddress, |
| 756 | CARD16 connectionType, |
| 757 | ChooserFunc function, |
| 758 | char *closure) |
| 759 | { |
| 760 | int haveLocalhost = 0; |
| 761 | DisplayEntry *d; |
| 762 | char *clientName = NULL((void*)0); |
| 763 | |
| 764 | for (d = database; d; d = d->next) |
| 765 | { |
| 766 | switch (d->type) { |
| 767 | case DISPLAY_ALIAS0: |
| 768 | case DISPLAY_LISTEN3: |
| 769 | continue; |
| 770 | case DISPLAY_PATTERN1: |
| 771 | if (!clientName) |
| 772 | clientName = NetworkAddressToHostname (connectionType, |
| 773 | clientAddress); |
| 774 | if (!patternMatch (clientName, d->entry.displayPattern)) |
| 775 | continue; |
| 776 | break; |
| 777 | case DISPLAY_ADDRESS2: |
| 778 | if (d->entry.displayAddress.connectionType != connectionType || |
| 779 | !XdmcpARRAY8Equal (&d->entry.displayAddress.clientAddress, |
| 780 | clientAddress)) |
| 781 | { |
| 782 | continue; |
| 783 | } |
| 784 | break; |
| 785 | } |
| 786 | if (!d->hosts) |
| 787 | continue; |
| 788 | if (d->notAllowed) |
| 789 | break; |
| 790 | if (d->chooser) |
| 791 | { |
| 792 | ARRAY8Ptr choice; |
| 793 | |
| 794 | choice = IndirectChoice (clientAddress, connectionType); |
| 795 | if (!choice || XdmcpARRAY8Equal (getLocalAddress(), choice)) |
| 796 | haveLocalhost = 1; |
| 797 | else |
| 798 | (*function) (connectionType, choice, closure); |
| 799 | } |
| 800 | else if (scanHostlist (d->hosts, clientAddress, connectionType, |
| 801 | function, closure, 0, FALSE0)) |
| 802 | { |
| 803 | haveLocalhost = 1; |
| 804 | } |
| 805 | break; |
| 806 | } |
| 807 | free (clientName); |
| 808 | return haveLocalhost; |
| 809 | } |
| 810 | |
| 811 | int UseChooser ( |
| 812 | ARRAY8Ptr clientAddress, |
| 813 | CARD16 connectionType) |
| 814 | { |
| 815 | DisplayEntry *d; |
| 816 | char *clientName = NULL((void*)0); |
| 817 | |
| 818 | for (d = database; d; d = d->next) |
| 819 | { |
| 820 | switch (d->type) { |
| 821 | case DISPLAY_ALIAS0: |
| 822 | case DISPLAY_LISTEN3: |
| 823 | continue; |
| 824 | case DISPLAY_PATTERN1: |
| 825 | if (!clientName) |
| 826 | clientName = NetworkAddressToHostname (connectionType, |
| 827 | clientAddress); |
| 828 | if (!patternMatch (clientName, d->entry.displayPattern)) |
| 829 | continue; |
| 830 | break; |
| 831 | case DISPLAY_ADDRESS2: |
| 832 | if (d->entry.displayAddress.connectionType != connectionType || |
| 833 | !XdmcpARRAY8Equal (&d->entry.displayAddress.clientAddress, |
| 834 | clientAddress)) |
| 835 | { |
| 836 | continue; |
| 837 | } |
| 838 | break; |
| 839 | } |
| 840 | if (!d->hosts) |
| 841 | continue; |
| 842 | if (d->notAllowed) |
| 843 | break; |
| 844 | if (d->chooser && !IndirectChoice (clientAddress, connectionType)) { |
| 845 | free (clientName); |
| 846 | return 1; |
| 847 | } |
| 848 | break; |
| 849 | } |
| 850 | free (clientName); |
| 851 | return 0; |
| 852 | } |
| 853 | |
| 854 | void ForEachChooserHost ( |
| 855 | ARRAY8Ptr clientAddress, |
| 856 | CARD16 connectionType, |
| 857 | ChooserFunc function, |
| 858 | char *closure) |
| 859 | { |
| 860 | int haveLocalhost = 0; |
| 861 | DisplayEntry *d; |
| 862 | char *clientName = NULL((void*)0); |
| 863 | |
| 864 | for (d = database; d; d = d->next) |
| 865 | { |
| 866 | switch (d->type) { |
| 867 | case DISPLAY_ALIAS0: |
| 868 | case DISPLAY_LISTEN3: |
| 869 | continue; |
| 870 | case DISPLAY_PATTERN1: |
| 871 | if (!clientName) |
| 872 | clientName = NetworkAddressToHostname (connectionType, |
| 873 | clientAddress); |
| 874 | if (!patternMatch (clientName, d->entry.displayPattern)) |
| 875 | continue; |
| 876 | break; |
| 877 | case DISPLAY_ADDRESS2: |
| 878 | if (d->entry.displayAddress.connectionType != connectionType || |
| 879 | !XdmcpARRAY8Equal (&d->entry.displayAddress.clientAddress, |
| 880 | clientAddress)) |
| 881 | { |
| 882 | continue; |
| 883 | } |
| 884 | break; |
| 885 | } |
| 886 | if (!d->hosts) |
| 887 | continue; |
| 888 | if (d->notAllowed) |
| 889 | break; |
| 890 | if (!d->chooser) |
| 891 | break; |
| 892 | if (scanHostlist (d->hosts, clientAddress, connectionType, |
| 893 | function, closure, 0, TRUE1)) |
| 894 | { |
| 895 | haveLocalhost = 1; |
| 896 | } |
| 897 | break; |
| 898 | } |
| 899 | free (clientName); |
| 900 | if (haveLocalhost) |
| 901 | (*function) (connectionType, getLocalAddress(), closure); |
| 902 | } |
| 903 | |
| 904 | /* |
| 905 | * returns TRUE if the given client is acceptable to the local host. The |
| 906 | * given display client is acceptable if it occurs without a host list. |
| 907 | */ |
| 908 | |
| 909 | int AcceptableDisplayAddress ( |
| 910 | ARRAY8Ptr clientAddress, |
| 911 | CARD16 connectionType, |
| 912 | xdmOpCode type) |
| 913 | { |
| 914 | DisplayEntry *d; |
| 915 | char *clientName = NULL((void*)0); |
| 916 | |
| 917 | if (!*accessFile) |
| 918 | return 1; |
| 919 | if (type == INDIRECT_QUERY) |
| 920 | return 1; |
| 921 | for (d = database; d; d = d->next) |
| 922 | { |
| 923 | if (d->hosts) |
| 924 | continue; |
| 925 | switch (d->type) { |
| 926 | case DISPLAY_ALIAS0: |
| 927 | case DISPLAY_LISTEN3: |
| 928 | continue; |
| 929 | case DISPLAY_PATTERN1: |
| 930 | if (!clientName) |
| 931 | clientName = NetworkAddressToHostname (connectionType, |
| 932 | clientAddress); |
| 933 | if (!patternMatch (clientName, d->entry.displayPattern)) |
| 934 | continue; |
| 935 | break; |
| 936 | case DISPLAY_ADDRESS2: |
| 937 | if (d->entry.displayAddress.connectionType != connectionType || |
| 938 | !XdmcpARRAY8Equal (&d->entry.displayAddress.clientAddress, |
| 939 | clientAddress)) |
| 940 | { |
| 941 | continue; |
| 942 | } |
| 943 | break; |
| 944 | } |
| 945 | break; |
| 946 | } |
| 947 | free (clientName); |
| 948 | return (d != 0) && (d->notAllowed == 0) |
| 949 | && (type == BROADCAST_QUERY ? d->notBroadcast == 0 : 1); |
| 950 | } |
| 951 | |
| 952 | void ForEachListenAddr ( |
| 953 | ListenFunc listenfunction, |
| 954 | ListenFunc mcastfunction, |
| 955 | void **closure) |
| 956 | { |
| 957 | DisplayEntry *d; |
| 958 | HostEntry *h; |
| 959 | int listenFound = 0; |
| 960 | |
| 961 | for (d = database; d != NULL((void*)0) ; d = d->next) |
| 962 | { |
| 963 | if (d->type == DISPLAY_LISTEN3) { |
| 964 | listenFound = 1; |
| 965 | h = d->hosts; |
| 966 | if (h != NULL((void*)0)) { |
| 967 | (*listenfunction) (&h->entry.hostAddress, closure); |
| 968 | for (h = h->next; h != NULL((void*)0); h = h->next) { |
| 969 | (*mcastfunction) (&h->entry.hostAddress, closure); |
| 970 | } |
| 971 | } |
| 972 | } |
| 973 | } |
| 974 | if (!listenFound) { |
| 975 | (*listenfunction) (NULL((void*)0), closure); |
| 976 | # if defined(IPv61) && defined(AF_INET630) && defined(XDM_DEFAULT_MCAST_ADDR6"ff02:0:0:0:0:0:0:12b") |
| 977 | { /* Join default IPv6 Multicast Group */ |
| 978 | |
| 979 | static ARRAY8 defaultMcastAddress; |
| 980 | |
| 981 | if (defaultMcastAddress.length == 0) { |
| 982 | struct in6_addr addr6; |
| 983 | |
| 984 | if (inet_pton(AF_INET630,XDM_DEFAULT_MCAST_ADDR6"ff02:0:0:0:0:0:0:12b",&addr6) == 1) { |
| 985 | if (!XdmcpAllocARRAY8 (&defaultMcastAddress, |
| 986 | sizeof(struct in6_addr))) { |
| 987 | LogOutOfMem ("ReadHostEntry\n"); |
| 988 | defaultMcastAddress.length = -1; |
| 989 | } else { |
| 990 | memcpy(defaultMcastAddress.data, &addr6,__builtin___memcpy_chk (defaultMcastAddress.data, &addr6, sizeof(struct in6_addr), __builtin_object_size (defaultMcastAddress .data, 0)) |
| 991 | sizeof(struct in6_addr))__builtin___memcpy_chk (defaultMcastAddress.data, &addr6, sizeof(struct in6_addr), __builtin_object_size (defaultMcastAddress .data, 0)); |
| 992 | } |
| 993 | } else { |
| 994 | defaultMcastAddress.length = -1; |
| 995 | } |
| 996 | } |
| 997 | if ( defaultMcastAddress.length == sizeof(struct in6_addr) ) { |
| 998 | (*mcastfunction) (&defaultMcastAddress, closure); |
| 999 | } |
| 1000 | } |
| 1001 | # endif |
| 1002 | } |
| 1003 | } |
| 1004 | |
| 1005 | |
| 1006 | #endif /* XDMCP */ |