| 1 | /*********************************************************** |
| 2 | |
| 3 | Copyright 1987, 1998 The Open Group |
| 4 | |
| 5 | All rights reserved. |
| 6 | |
| 7 | Permission is hereby granted, free of charge, to any person obtaining a |
| 8 | copy of this software and associated documentation files (the |
| 9 | "Software"), to deal in the Software without restriction, including |
| 10 | without limitation the rights to use, copy, modify, merge, publish, |
| 11 | distribute, and/or sell copies of the Software, and to permit persons |
| 12 | to whom the Software is furnished to do so, provided that the above |
| 13 | copyright notice(s) and this permission notice appear in all copies of |
| 14 | the Software and that both the above copyright notice(s) and this |
| 15 | permission notice appear in supporting documentation. |
| 16 | |
| 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 18 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 19 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT |
| 20 | OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| 21 | HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL |
| 22 | INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING |
| 23 | FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, |
| 24 | NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION |
| 25 | WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 26 | |
| 27 | Except as contained in this notice, the name of a copyright holder |
| 28 | shall not be used in advertising or otherwise to promote the sale, use |
| 29 | or other dealings in this Software without prior written authorization |
| 30 | of the copyright holder. |
| 31 | |
| 32 | X Window System is a trademark of The Open Group. |
| 33 | |
| 34 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. |
| 35 | |
| 36 | All Rights Reserved |
| 37 | |
| 38 | Permission to use, copy, modify, and distribute this software and its |
| 39 | documentation for any purpose and without fee is hereby granted, |
| 40 | provided that the above copyright notice appear in all copies and that |
| 41 | both that copyright notice and this permission notice appear in |
| 42 | supporting documentation, and that the name of Digital not be |
| 43 | used in advertising or publicity pertaining to distribution of the |
| 44 | software without specific, written prior permission. |
| 45 | |
| 46 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 47 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 48 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 49 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 50 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 51 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 52 | SOFTWARE. |
| 53 | |
| 54 | ******************************************************************/ |
| 55 | |
| 56 | /* |
| 57 | * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
| 58 | * |
| 59 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 60 | * copy of this software and associated documentation files (the "Software"), |
| 61 | * to deal in the Software without restriction, including without limitation |
| 62 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 63 | * and/or sell copies of the Software, and to permit persons to whom the |
| 64 | * Software is furnished to do so, subject to the following conditions: |
| 65 | * |
| 66 | * The above copyright notice and this permission notice (including the next |
| 67 | * paragraph) shall be included in all copies or substantial portions of the |
| 68 | * Software. |
| 69 | * |
| 70 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 71 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 72 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 73 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 74 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 75 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 76 | * DEALINGS IN THE SOFTWARE. |
| 77 | */ |
| 78 | |
| 79 | #ifdef HAVE_DIX_CONFIG_H |
| 80 | #include <dix-config.h> |
| 81 | #endif |
| 82 | |
| 83 | #ifdef WIN32 |
| 84 | #include <X11/Xwinsock.h> |
| 85 | #endif |
| 86 | |
| 87 | #include <stdio.h> |
| 88 | #include <stdlib.h> |
| 89 | #define XSERV_t |
| 90 | #define TRANS_SERVER |
| 91 | #define TRANS_REOPEN |
| 92 | #include <X11/Xtrans/Xtrans.h> |
| 93 | #include <X11/Xauth.h> |
| 94 | #include <X11/X.h> |
| 95 | #include <X11/Xproto.h> |
| 96 | #include "misc.h" |
| 97 | #include "site.h" |
| 98 | #include <errno.h> |
| 99 | #include <sys/types.h> |
| 100 | #ifndef WIN32 |
| 101 | #include <sys/socket.h> |
| 102 | #include <sys/ioctl.h> |
| 103 | #include <ctype.h> |
| 104 | |
| 105 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 106 | #include <netinet/in.h> |
| 107 | #endif /* TCPCONN || STREAMSCONN */ |
| 108 | |
| 109 | #ifdef HAVE_GETPEERUCRED |
| 110 | #include <ucred.h> |
| 111 | #ifdef sun |
| 112 | #include <zone.h> |
| 113 | #endif |
| 114 | #endif |
| 115 | |
| 116 | #if defined(SVR4) || (defined(SYSV) && defined(__i386__)) || defined(__GNU__) |
| 117 | #include <sys/utsname.h> |
| 118 | #endif |
| 119 | #if defined(SYSV) && defined(__i386__) |
| 120 | #include <sys/stream.h> |
| 121 | #endif |
| 122 | #ifdef __GNU__ |
| 123 | #undef SIOCGIFCONF |
| 124 | #include <netdb.h> |
| 125 | #else /*!__GNU__ */ |
| 126 | #include <net/if.h> |
| 127 | #endif /*__GNU__ */ |
| 128 | |
| 129 | #ifdef SVR4 |
| 130 | #include <sys/sockio.h> |
| 131 | #include <sys/stropts.h> |
| 132 | #endif |
| 133 | |
| 134 | #include <netdb.h> |
| 135 | |
| 136 | #ifdef CSRG_BASED |
| 137 | #include <sys/param.h> |
| 138 | #if (BSD >= 199103) |
| 139 | #define VARIABLE_IFREQ |
| 140 | #endif |
| 141 | #endif |
| 142 | |
| 143 | #ifdef BSD44SOCKETS |
| 144 | #ifndef VARIABLE_IFREQ |
| 145 | #define VARIABLE_IFREQ |
| 146 | #endif |
| 147 | #endif |
| 148 | |
| 149 | #ifdef HAVE_GETIFADDRS |
| 150 | #include <ifaddrs.h> |
| 151 | #endif |
| 152 | |
| 153 | /* Solaris provides an extended interface SIOCGLIFCONF. Other systems |
| 154 | * may have this as well, but the code has only been tested on Solaris |
| 155 | * so far, so we only enable it there. Other platforms may be added as |
| 156 | * needed. |
| 157 | * |
| 158 | * Test for Solaris commented out -- TSI @ UQV 2003.06.13 |
| 159 | */ |
| 160 | #ifdef SIOCGLIFCONF |
| 161 | /* #if defined(sun) */ |
| 162 | #define USE_SIOCGLIFCONF |
| 163 | /* #endif */ |
| 164 | #endif |
| 165 | |
| 166 | #if defined(IPv6) && defined(AF_INET6) |
| 167 | #include <arpa/inet.h> |
| 168 | #endif |
| 169 | |
| 170 | #endif /* WIN32 */ |
| 171 | |
| 172 | #define X_INCLUDE_NETDB_H |
| 173 | #include <X11/Xos_r.h> |
| 174 | |
| 175 | #include "dixstruct.h" |
| 176 | #include "osdep.h" |
| 177 | |
| 178 | #include "xace.h" |
| 179 | |
| 180 | Bool defeatAccessControl = FALSE; |
| 181 | |
| 182 | #define addrEqual(fam, address, length, host) \ |
| 183 | ((fam) == (host)->family &&\ |
| 184 | (length) == (host)->len &&\ |
| 185 | !memcmp (address, (host)->addr, length)) |
| 186 | |
| 187 | static int ConvertAddr(struct sockaddr * /*saddr */ , |
| 188 | int * /*len */ , |
| 189 | pointer * /*addr */ ); |
| 190 | |
| 191 | static int CheckAddr(int /*family */ , |
| 192 | const void * /*pAddr */ , |
| 193 | unsigned /*length */ ); |
| 194 | |
| 195 | static Bool NewHost(int /*family */ , |
| 196 | const void * /*addr */ , |
| 197 | int /*len */ , |
| 198 | int /* addingLocalHosts */ ); |
| 199 | |
| 200 | /* XFree86 bug #156: To keep track of which hosts were explicitly requested in |
| 201 | /etc/X<display>.hosts, we've added a requested field to the HOST struct, |
| 202 | and a LocalHostRequested variable. These default to FALSE, but are set |
| 203 | to TRUE in ResetHosts when reading in /etc/X<display>.hosts. They are |
| 204 | checked in DisableLocalHost(), which is called to disable the default |
| 205 | local host entries when stronger authentication is turned on. */ |
| 206 | |
| 207 | typedef struct _host { |
| 208 | short family; |
| 209 | short len; |
| 210 | unsigned char *addr; |
| 211 | struct _host *next; |
| 212 | int requested; |
| 213 | } HOST; |
| 214 | |
| 215 | #define MakeHost(h,l) (h)=malloc(sizeof *(h)+(l));\ |
| 216 | if (h) { \ |
| 217 | (h)->addr=(unsigned char *) ((h) + 1);\ |
| 218 | (h)->requested = FALSE; \ |
| 219 | } |
| 220 | #define FreeHost(h) free(h) |
| 221 | static HOST *selfhosts = NULL; |
| 222 | static HOST *validhosts = NULL; |
| 223 | static int AccessEnabled = DEFAULT_ACCESS_CONTROL; |
| 224 | static int LocalHostEnabled = FALSE; |
| 225 | static int LocalHostRequested = FALSE; |
| 226 | static int UsingXdmcp = FALSE; |
| 227 | |
| 228 | /* FamilyServerInterpreted implementation */ |
| 229 | static Bool siAddrMatch(int family, pointer addr, int len, HOST * host, |
| 230 | ClientPtr client); |
| 231 | static int siCheckAddr(const char *addrString, int length); |
| 232 | static void siTypesInitialize(void); |
| 233 | |
| 234 | /* |
| 235 | * called when authorization is not enabled to add the |
| 236 | * local host to the access list |
| 237 | */ |
| 238 | |
| 239 | void |
| 240 | EnableLocalHost(void) |
| 241 | { |
| 242 | if (!UsingXdmcp) { |
| 243 | LocalHostEnabled = TRUE; |
| 244 | AddLocalHosts(); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * called when authorization is enabled to keep us secure |
| 250 | */ |
| 251 | void |
| 252 | DisableLocalHost(void) |
| 253 | { |
| 254 | HOST *self; |
| 255 | |
| 256 | if (!LocalHostRequested) /* Fix for XFree86 bug #156 */ |
| 257 | LocalHostEnabled = FALSE; |
| 258 | for (self = selfhosts; self; self = self->next) { |
| 259 | if (!self->requested) /* Fix for XFree86 bug #156 */ |
| 260 | (void) RemoveHost((ClientPtr) NULL, self->family, self->len, |
| 261 | (pointer) self->addr); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /* |
| 266 | * called at init time when XDMCP will be used; xdmcp always |
| 267 | * adds local hosts manually when needed |
| 268 | */ |
| 269 | |
| 270 | void |
| 271 | AccessUsingXdmcp(void) |
| 272 | { |
| 273 | UsingXdmcp = TRUE; |
| 274 | LocalHostEnabled = FALSE; |
| 275 | } |
| 276 | |
| 277 | #if defined(SVR4) && !defined(sun) && defined(SIOCGIFCONF) && !defined(USE_SIOCGLIFCONF) |
| 278 | |
| 279 | /* Deal with different SIOCGIFCONF ioctl semantics on these OSs */ |
| 280 | |
| 281 | static int |
| 282 | ifioctl(int fd, int cmd, char *arg) |
| 283 | { |
| 284 | struct strioctl ioc; |
| 285 | int ret; |
| 286 | |
| 287 | memset((char *) &ioc, 0, sizeof(ioc)); |
| 288 | ioc.ic_cmd = cmd; |
| 289 | ioc.ic_timout = 0; |
| 290 | if (cmd == SIOCGIFCONF) { |
| 291 | ioc.ic_len = ((struct ifconf *) arg)->ifc_len; |
| 292 | ioc.ic_dp = ((struct ifconf *) arg)->ifc_buf; |
| 293 | } |
| 294 | else { |
| 295 | ioc.ic_len = sizeof(struct ifreq); |
| 296 | ioc.ic_dp = arg; |
| 297 | } |
| 298 | ret = ioctl(fd, I_STR, (char *) &ioc); |
| 299 | if (ret >= 0 && cmd == SIOCGIFCONF) |
| 300 | #ifdef SVR4 |
| 301 | ((struct ifconf *) arg)->ifc_len = ioc.ic_len; |
| 302 | #endif |
| 303 | return ret; |
| 304 | } |
| 305 | #else |
| 306 | #define ifioctl ioctl |
| 307 | #endif |
| 308 | |
| 309 | /* |
| 310 | * DefineSelf (fd): |
| 311 | * |
| 312 | * Define this host for access control. Find all the hosts the OS knows about |
| 313 | * for this fd and add them to the selfhosts list. |
| 314 | */ |
| 315 | |
| 316 | #if !defined(SIOCGIFCONF) |
| 317 | void |
| 318 | DefineSelf(int fd) |
| 319 | { |
| 320 | #if !defined(TCPCONN) && !defined(STREAMSCONN) && !defined(UNIXCONN) |
| 321 | return; |
| 322 | #else |
| 323 | register int n; |
| 324 | int len; |
| 325 | caddr_t addr; |
| 326 | int family; |
| 327 | register HOST *host; |
| 328 | |
| 329 | #ifndef WIN32 |
| 330 | struct utsname name; |
| 331 | #else |
| 332 | struct { |
| 333 | char nodename[512]; |
| 334 | } name; |
| 335 | #endif |
| 336 | |
| 337 | register struct hostent *hp; |
| 338 | |
| 339 | union { |
| 340 | struct sockaddr sa; |
| 341 | struct sockaddr_in in; |
| 342 | #if defined(IPv6) && defined(AF_INET6) |
| 343 | struct sockaddr_in6 in6; |
| 344 | #endif |
| 345 | } saddr; |
| 346 | |
| 347 | struct sockaddr_in *inetaddr; |
| 348 | struct sockaddr_in6 *inet6addr; |
| 349 | struct sockaddr_in broad_addr; |
| 350 | |
| 351 | #ifdef XTHREADS_NEEDS_BYNAMEPARAMS |
| 352 | _Xgethostbynameparams hparams; |
| 353 | #endif |
| 354 | |
| 355 | /* Why not use gethostname()? Well, at least on my system, I've had to |
| 356 | * make an ugly kernel patch to get a name longer than 8 characters, and |
| 357 | * uname() lets me access to the whole string (it smashes release, you |
| 358 | * see), whereas gethostname() kindly truncates it for me. |
| 359 | */ |
| 360 | #ifndef WIN32 |
| 361 | uname(&name); |
| 362 | #else |
| 363 | gethostname(name.nodename, sizeof(name.nodename)); |
| 364 | #endif |
| 365 | |
| 366 | hp = _XGethostbyname(name.nodename, hparams); |
| 367 | if (hp != NULL) { |
| 368 | saddr.sa.sa_family = hp->h_addrtype; |
| 369 | switch (hp->h_addrtype) { |
| 370 | case AF_INET: |
| 371 | inetaddr = (struct sockaddr_in *) (&(saddr.sa)); |
| 372 | memcpy(&(inetaddr->sin_addr), hp->h_addr, hp->h_length); |
| 373 | len = sizeof(saddr.sa); |
| 374 | break; |
| 375 | #if defined(IPv6) && defined(AF_INET6) |
| 376 | case AF_INET6: |
| 377 | inet6addr = (struct sockaddr_in6 *) (&(saddr.sa)); |
| 378 | memcpy(&(inet6addr->sin6_addr), hp->h_addr, hp->h_length); |
| 379 | len = sizeof(saddr.in6); |
| 380 | break; |
| 381 | #endif |
| 382 | default: |
| 383 | goto DefineLocalHost; |
| 384 | } |
| 385 | family = ConvertAddr(&(saddr.sa), &len, (pointer *) &addr); |
| 386 | if (family != -1 && family != FamilyLocal) { |
| 387 | for (host = selfhosts; |
| 388 | host && !addrEqual(family, addr, len, host); |
| 389 | host = host->next); |
| 390 | if (!host) { |
| 391 | /* add this host to the host list. */ |
| 392 | MakeHost(host, len) |
| 393 | if (host) { |
| 394 | host->family = family; |
| 395 | host->len = len; |
| 396 | memcpy(host->addr, addr, len); |
| 397 | host->next = selfhosts; |
| 398 | selfhosts = host; |
| 399 | } |
| 400 | #ifdef XDMCP |
| 401 | /* |
| 402 | * If this is an Internet Address, but not the localhost |
| 403 | * address (127.0.0.1), nor the bogus address (0.0.0.0), |
| 404 | * register it. |
| 405 | */ |
| 406 | if (family == FamilyInternet && |
| 407 | !(len == 4 && |
| 408 | ((addr[0] == 127) || |
| 409 | (addr[0] == 0 && addr[1] == 0 && |
| 410 | addr[2] == 0 && addr[3] == 0))) |
| 411 | ) { |
| 412 | XdmcpRegisterConnection(family, (char *) addr, len); |
| 413 | broad_addr = *inetaddr; |
| 414 | ((struct sockaddr_in *) &broad_addr)->sin_addr.s_addr = |
| 415 | htonl(INADDR_BROADCAST); |
| 416 | XdmcpRegisterBroadcastAddress((struct sockaddr_in *) |
| 417 | &broad_addr); |
| 418 | } |
| 419 | #if defined(IPv6) && defined(AF_INET6) |
| 420 | else if (family == FamilyInternet6 && |
| 421 | !(IN6_IS_ADDR_LOOPBACK((struct in6_addr *) addr))) { |
| 422 | XdmcpRegisterConnection(family, (char *) addr, len); |
| 423 | } |
| 424 | #endif |
| 425 | |
| 426 | #endif /* XDMCP */ |
| 427 | } |
| 428 | } |
| 429 | } |
| 430 | /* |
| 431 | * now add a host of family FamilyLocalHost... |
| 432 | */ |
| 433 | DefineLocalHost: |
| 434 | for (host = selfhosts; |
| 435 | host && !addrEqual(FamilyLocalHost, "", 0, host); host = host->next); |
| 436 | if (!host) { |
| 437 | MakeHost(host, 0); |
| 438 | if (host) { |
| 439 | host->family = FamilyLocalHost; |
| 440 | host->len = 0; |
| 441 | /* Nothing to store in host->addr */ |
| 442 | host->next = selfhosts; |
| 443 | selfhosts = host; |
| 444 | } |
| 445 | } |
| 446 | #endif /* !TCPCONN && !STREAMSCONN && !UNIXCONN */ |
| 447 | } |
| 448 | |
| 449 | #else |
| 450 | |
| 451 | #ifdef USE_SIOCGLIFCONF |
| 452 | #define ifr_type struct lifreq |
| 453 | #else |
| 454 | #define ifr_type struct ifreq |
| 455 | #endif |
| 456 | |
| 457 | #ifdef VARIABLE_IFREQ |
| 458 | #define ifr_size(p) (sizeof (struct ifreq) + \ |
| 459 | (p->ifr_addr.sa_len > sizeof (p->ifr_addr) ? \ |
| 460 | p->ifr_addr.sa_len - sizeof (p->ifr_addr) : 0)) |
| 461 | #define ifraddr_size(a) (a.sa_len) |
| 462 | #else |
| 463 | #define ifr_size(p) (sizeof (ifr_type)) |
| 464 | #define ifraddr_size(a) (sizeof (a)) |
| 465 | #endif |
| 466 | |
| 467 | #if defined(IPv6) && defined(AF_INET6) |
| 468 | static void |
| 469 | in6_fillscopeid(struct sockaddr_in6 *sin6) |
| 470 | { |
| 471 | #if defined(__KAME__) |
| 472 | if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { |
| 473 | sin6->sin6_scope_id = |
| 474 | ntohs(*(u_int16_t *) &sin6->sin6_addr.s6_addr[2]); |
| 475 | sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0; |
| 476 | } |
| 477 | #endif |
| 478 | } |
| 479 | #endif |
| 480 | |
| 481 | void |
| 482 | DefineSelf(int fd) |
| 483 | { |
| 484 | #ifndef HAVE_GETIFADDRS |
| 485 | char *cp, *cplim; |
| 486 | |
| 487 | #ifdef USE_SIOCGLIFCONF |
| 488 | struct sockaddr_storage buf[16]; |
| 489 | struct lifconf ifc; |
| 490 | register struct lifreq *ifr; |
| 491 | |
| 492 | #ifdef SIOCGLIFNUM |
| 493 | struct lifnum ifn; |
| 494 | #endif |
| 495 | #else /* !USE_SIOCGLIFCONF */ |
| 496 | char buf[2048]; |
| 497 | struct ifconf ifc; |
| 498 | register struct ifreq *ifr; |
| 499 | #endif |
| 500 | void *bufptr = buf; |
| 501 | #else /* HAVE_GETIFADDRS */ |
| 502 | struct ifaddrs *ifap, *ifr; |
| 503 | #endif |
| 504 | int len; |
| 505 | unsigned char *addr; |
| 506 | int family; |
| 507 | register HOST *host; |
| 508 | |
| 509 | #ifndef HAVE_GETIFADDRS |
| 510 | |
| 511 | len = sizeof(buf); |
| 512 | |
| 513 | #ifdef USE_SIOCGLIFCONF |
| 514 | |
| 515 | #ifdef SIOCGLIFNUM |
| 516 | ifn.lifn_family = AF_UNSPEC; |
| 517 | ifn.lifn_flags = 0; |
| 518 | if (ioctl(fd, SIOCGLIFNUM, (char *) &ifn) < 0) |
| 519 | ErrorF("Getting interface count: %s\n", strerror(errno)); |
| 520 | if (len < (ifn.lifn_count * sizeof(struct lifreq))) { |
| 521 | len = ifn.lifn_count * sizeof(struct lifreq); |
| 522 | bufptr = malloc(len); |
| 523 | } |
| 524 | #endif |
| 525 | |
| 526 | ifc.lifc_family = AF_UNSPEC; |
| 527 | ifc.lifc_flags = 0; |
| 528 | ifc.lifc_len = len; |
| 529 | ifc.lifc_buf = bufptr; |
| 530 | |
| 531 | #define IFC_IOCTL_REQ SIOCGLIFCONF |
| 532 | #define IFC_IFC_REQ ifc.lifc_req |
| 533 | #define IFC_IFC_LEN ifc.lifc_len |
| 534 | #define IFR_IFR_ADDR ifr->lifr_addr |
| 535 | #define IFR_IFR_NAME ifr->lifr_name |
| 536 | |
| 537 | #else /* Use SIOCGIFCONF */ |
| 538 | ifc.ifc_len = len; |
| 539 | ifc.ifc_buf = bufptr; |
| 540 | |
| 541 | #define IFC_IOCTL_REQ SIOCGIFCONF |
| 542 | #define IFC_IFC_REQ ifc.ifc_req |
| 543 | #define IFC_IFC_LEN ifc.ifc_len |
| 544 | #define IFR_IFR_ADDR ifr->ifr_addr |
| 545 | #define IFR_IFR_NAME ifr->ifr_name |
| 546 | #endif |
| 547 | |
| 548 | if (ifioctl(fd, IFC_IOCTL_REQ, (pointer) &ifc) < 0) |
| 549 | ErrorF("Getting interface configuration (4): %s\n", strerror(errno)); |
| 550 | |
| 551 | cplim = (char *) IFC_IFC_REQ + IFC_IFC_LEN; |
| 552 | |
| 553 | for (cp = (char *) IFC_IFC_REQ; cp < cplim; cp += ifr_size(ifr)) { |
| 554 | ifr = (ifr_type *) cp; |
| 555 | len = ifraddr_size(IFR_IFR_ADDR); |
| 556 | family = ConvertAddr((struct sockaddr *) &IFR_IFR_ADDR, |
| 557 | &len, (pointer *) &addr); |
| 558 | if (family == -1 || family == FamilyLocal) |
| 559 | continue; |
| 560 | #if defined(IPv6) && defined(AF_INET6) |
| 561 | if (family == FamilyInternet6) |
| 562 | in6_fillscopeid((struct sockaddr_in6 *) &IFR_IFR_ADDR); |
| 563 | #endif |
| 564 | for (host = selfhosts; |
| 565 | host && !addrEqual(family, addr, len, host); host = host->next); |
| 566 | if (host) |
| 567 | continue; |
| 568 | MakeHost(host, len) |
| 569 | if (host) { |
| 570 | host->family = family; |
| 571 | host->len = len; |
| 572 | memcpy(host->addr, addr, len); |
| 573 | host->next = selfhosts; |
| 574 | selfhosts = host; |
| 575 | } |
| 576 | #ifdef XDMCP |
| 577 | { |
| 578 | #ifdef USE_SIOCGLIFCONF |
| 579 | struct sockaddr_storage broad_addr; |
| 580 | #else |
| 581 | struct sockaddr broad_addr; |
| 582 | #endif |
| 583 | |
| 584 | /* |
| 585 | * If this isn't an Internet Address, don't register it. |
| 586 | */ |
| 587 | if (family != FamilyInternet |
| 588 | #if defined(IPv6) && defined(AF_INET6) |
| 589 | && family != FamilyInternet6 |
| 590 | #endif |
| 591 | ) |
| 592 | continue; |
| 593 | |
| 594 | /* |
| 595 | * ignore 'localhost' entries as they're not useful |
| 596 | * on the other end of the wire |
| 597 | */ |
| 598 | if (family == FamilyInternet && |
| 599 | addr[0] == 127 && addr[1] == 0 && addr[2] == 0 && addr[3] == 1) |
| 600 | continue; |
| 601 | #if defined(IPv6) && defined(AF_INET6) |
| 602 | else if (family == FamilyInternet6 && |
| 603 | IN6_IS_ADDR_LOOPBACK((struct in6_addr *) addr)) |
| 604 | continue; |
| 605 | #endif |
| 606 | |
| 607 | /* |
| 608 | * Ignore '0.0.0.0' entries as they are |
| 609 | * returned by some OSes for unconfigured NICs but they are |
| 610 | * not useful on the other end of the wire. |
| 611 | */ |
| 612 | if (len == 4 && |
| 613 | addr[0] == 0 && addr[1] == 0 && addr[2] == 0 && addr[3] == 0) |
| 614 | continue; |
| 615 | |
| 616 | XdmcpRegisterConnection(family, (char *) addr, len); |
| 617 | |
| 618 | #if defined(IPv6) && defined(AF_INET6) |
| 619 | /* IPv6 doesn't support broadcasting, so we drop out here */ |
| 620 | if (family == FamilyInternet6) |
| 621 | continue; |
| 622 | #endif |
| 623 | |
| 624 | broad_addr = IFR_IFR_ADDR; |
| 625 | |
| 626 | ((struct sockaddr_in *) &broad_addr)->sin_addr.s_addr = |
| 627 | htonl(INADDR_BROADCAST); |
| 628 | #if defined(USE_SIOCGLIFCONF) && defined(SIOCGLIFBRDADDR) |
| 629 | { |
| 630 | struct lifreq broad_req; |
| 631 | |
| 632 | broad_req = *ifr; |
| 633 | if (ioctl(fd, SIOCGLIFFLAGS, (char *) &broad_req) != -1 && |
| 634 | (broad_req.lifr_flags & IFF_BROADCAST) && |
| 635 | (broad_req.lifr_flags & IFF_UP) |
| 636 | ) { |
| 637 | broad_req = *ifr; |
| 638 | if (ioctl(fd, SIOCGLIFBRDADDR, &broad_req) != -1) |
| 639 | broad_addr = broad_req.lifr_broadaddr; |
| 640 | else |
| 641 | continue; |
| 642 | } |
| 643 | else |
| 644 | continue; |
| 645 | } |
| 646 | |
| 647 | #elif defined(SIOCGIFBRDADDR) |
| 648 | { |
| 649 | struct ifreq broad_req; |
| 650 | |
| 651 | broad_req = *ifr; |
| 652 | if (ifioctl(fd, SIOCGIFFLAGS, (pointer) &broad_req) != -1 && |
| 653 | (broad_req.ifr_flags & IFF_BROADCAST) && |
| 654 | (broad_req.ifr_flags & IFF_UP) |
| 655 | ) { |
| 656 | broad_req = *ifr; |
| 657 | if (ifioctl(fd, SIOCGIFBRDADDR, (pointer) &broad_req) != -1) |
| 658 | broad_addr = broad_req.ifr_addr; |
| 659 | else |
| 660 | continue; |
| 661 | } |
| 662 | else |
| 663 | continue; |
| 664 | } |
| 665 | #endif /* SIOCGIFBRDADDR */ |
| 666 | XdmcpRegisterBroadcastAddress((struct sockaddr_in *) &broad_addr); |
| 667 | } |
| 668 | #endif /* XDMCP */ |
| 669 | } |
| 670 | if (bufptr != buf) |
| 671 | free(bufptr); |
| 672 | #else /* HAVE_GETIFADDRS */ |
| 673 | if (getifaddrs(&ifap) < 0) { |
| 674 | ErrorF("Warning: getifaddrs returns %s\n", strerror(errno)); |
| 675 | return; |
| 676 | } |
| 677 | for (ifr = ifap; ifr != NULL; ifr = ifr->ifa_next) { |
| 678 | if (!ifr->ifa_addr) |
| 679 | continue; |
| 680 | len = sizeof(*(ifr->ifa_addr)); |
| 681 | family = ConvertAddr((struct sockaddr *) ifr->ifa_addr, &len, |
| 682 | (pointer *) &addr); |
| 683 | if (family == -1 || family == FamilyLocal) |
| 684 | continue; |
| 685 | #if defined(IPv6) && defined(AF_INET6) |
| 686 | if (family == FamilyInternet6) |
| 687 | in6_fillscopeid((struct sockaddr_in6 *) ifr->ifa_addr); |
| 688 | #endif |
| 689 | |
| 690 | for (host = selfhosts; |
| 691 | host != NULL && !addrEqual(family, addr, len, host); |
| 692 | host = host->next); |
| 693 | if (host != NULL) |
| 694 | continue; |
| 695 | MakeHost(host, len); |
| 696 | if (host != NULL) { |
| 697 | host->family = family; |
| 698 | host->len = len; |
| 699 | memcpy(host->addr, addr, len); |
| 700 | host->next = selfhosts; |
| 701 | selfhosts = host; |
| 702 | } |
| 703 | #ifdef XDMCP |
| 704 | { |
| 705 | /* |
| 706 | * If this isn't an Internet Address, don't register it. |
| 707 | */ |
| 708 | if (family != FamilyInternet |
| 709 | #if defined(IPv6) && defined(AF_INET6) |
| 710 | && family != FamilyInternet6 |
| 711 | #endif |
| 712 | ) |
| 713 | continue; |
| 714 | |
| 715 | /* |
| 716 | * ignore 'localhost' entries as they're not useful |
| 717 | * on the other end of the wire |
| 718 | */ |
| 719 | if (ifr->ifa_flags & IFF_LOOPBACK) |
| 720 | continue; |
| 721 | |
| 722 | if (family == FamilyInternet && |
| 723 | addr[0] == 127 && addr[1] == 0 && addr[2] == 0 && addr[3] == 1) |
| 724 | continue; |
| 725 | |
| 726 | /* |
| 727 | * Ignore '0.0.0.0' entries as they are |
| 728 | * returned by some OSes for unconfigured NICs but they are |
| 729 | * not useful on the other end of the wire. |
| 730 | */ |
| 731 | if (len == 4 && |
| 732 | addr[0] == 0 && addr[1] == 0 && addr[2] == 0 && addr[3] == 0) |
| 733 | continue; |
| 734 | #if defined(IPv6) && defined(AF_INET6) |
| 735 | else if (family == FamilyInternet6 && |
| 736 | IN6_IS_ADDR_LOOPBACK((struct in6_addr *) addr)) |
| 737 | continue; |
| 738 | #endif |
| 739 | XdmcpRegisterConnection(family, (char *) addr, len); |
| 740 | #if defined(IPv6) && defined(AF_INET6) |
| 741 | if (family == FamilyInternet6) |
| 742 | /* IPv6 doesn't support broadcasting, so we drop out here */ |
| 743 | continue; |
| 744 | #endif |
| 745 | if ((ifr->ifa_flags & IFF_BROADCAST) && |
| 746 | (ifr->ifa_flags & IFF_UP) && ifr->ifa_broadaddr) |
| 747 | XdmcpRegisterBroadcastAddress((struct sockaddr_in *) ifr-> |
| 748 | ifa_broadaddr); |
| 749 | else |
| 750 | continue; |
| 751 | } |
| 752 | #endif /* XDMCP */ |
| 753 | |
| 754 | } /* for */ |
| 755 | freeifaddrs(ifap); |
| 756 | #endif /* HAVE_GETIFADDRS */ |
| 757 | |
| 758 | /* |
| 759 | * add something of FamilyLocalHost |
| 760 | */ |
| 761 | for (host = selfhosts; |
| 762 | host && !addrEqual(FamilyLocalHost, "", 0, host); host = host->next); |
| 763 | if (!host) { |
| 764 | MakeHost(host, 0); |
| 765 | if (host) { |
| 766 | host->family = FamilyLocalHost; |
| 767 | host->len = 0; |
| 768 | /* Nothing to store in host->addr */ |
| 769 | host->next = selfhosts; |
| 770 | selfhosts = host; |
| 771 | } |
| 772 | } |
| 773 | } |
| 774 | #endif /* hpux && !HAVE_IFREQ */ |
| 775 | |
| 776 | #ifdef XDMCP |
| 777 | void |
| 778 | AugmentSelf(pointer from, int len) |
| 779 | { |
| 780 | int family; |
| 781 | pointer addr; |
| 782 | register HOST *host; |
| 783 | |
| 784 | family = ConvertAddr(from, &len, (pointer *) &addr); |
| 785 | if (family == -1 || family == FamilyLocal) |
| 786 | return; |
| 787 | for (host = selfhosts; host; host = host->next) { |
| 788 | if (addrEqual(family, addr, len, host)) |
| 789 | return; |
| 790 | } |
| 791 | MakeHost(host, len) |
| 792 | if (!host) |
| 793 | return; |
| 794 | host->family = family; |
| 795 | host->len = len; |
| 796 | memcpy(host->addr, addr, len); |
| 797 | host->next = selfhosts; |
| 798 | selfhosts = host; |
| 799 | } |
| 800 | #endif |
| 801 | |
| 802 | void |
| 803 | AddLocalHosts(void) |
| 804 | { |
| 805 | HOST *self; |
| 806 | |
| 807 | for (self = selfhosts; self; self = self->next) |
| 808 | /* Fix for XFree86 bug #156: pass addingLocal = TRUE to |
| 809 | * NewHost to tell that we are adding the default local |
| 810 | * host entries and not to flag the entries as being |
| 811 | * explicitely requested */ |
| 812 | (void) NewHost(self->family, self->addr, self->len, TRUE); |
| 813 | } |
| 814 | |
| 815 | /* Reset access control list to initial hosts */ |
| 816 | void |
| 817 | ResetHosts(char *display) |
| 818 | { |
| 819 | register HOST *host; |
| 820 | char lhostname[120], ohostname[120]; |
| 821 | char *hostname = ohostname; |
| 822 | char fname[PATH_MAX + 1]; |
| 823 | int fnamelen; |
| 824 | FILE *fd; |
| 825 | char *ptr; |
| 826 | int i, hostlen; |
| 827 | |
| 828 | #if (defined(TCPCONN) || defined(STREAMSCONN) ) && \ |
| 829 | (!defined(IPv6) || !defined(AF_INET6)) |
| 830 | union { |
| 831 | struct sockaddr sa; |
| 832 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 833 | struct sockaddr_in in; |
| 834 | #endif /* TCPCONN || STREAMSCONN */ |
| 835 | } saddr; |
| 836 | #endif |
| 837 | int family = 0; |
| 838 | pointer addr; |
| 839 | int len; |
| 840 | |
| 841 | siTypesInitialize(); |
| 842 | AccessEnabled = defeatAccessControl ? FALSE : DEFAULT_ACCESS_CONTROL; |
| 843 | LocalHostEnabled = FALSE; |
| 844 | while ((host = validhosts) != 0) { |
| 845 | validhosts = host->next; |
| 846 | FreeHost(host); |
| 847 | } |
| 848 | |
| 849 | #if defined WIN32 && defined __MINGW32__ |
| 850 | #define ETC_HOST_PREFIX "X" |
| 851 | #else |
| 852 | #define ETC_HOST_PREFIX "/etc/X" |
| 853 | #endif |
| 854 | #define ETC_HOST_SUFFIX ".hosts" |
| 855 | fnamelen = strlen(ETC_HOST_PREFIX) + strlen(ETC_HOST_SUFFIX) + |
| 856 | strlen(display) + 1; |
| 857 | if (fnamelen > sizeof(fname)) |
| 858 | FatalError("Display name `%s' is too long\n", display); |
| 859 | snprintf(fname, sizeof(fname), ETC_HOST_PREFIX "%s" ETC_HOST_SUFFIX, |
| 860 | display); |
| 861 | |
| 862 | if ((fd = fopen(fname, "r")) != 0) { |
| 863 | while (fgets(ohostname, sizeof(ohostname), fd)) { |
| 864 | family = FamilyWild; |
| 865 | if (*ohostname == '#') |
| 866 | continue; |
| 867 | if ((ptr = strchr(ohostname, '\n')) != 0) |
| 868 | *ptr = 0; |
| 869 | hostlen = strlen(ohostname) + 1; |
| 870 | for (i = 0; i < hostlen; i++) |
| 871 | lhostname[i] = tolower(ohostname[i]); |
| 872 | hostname = ohostname; |
| 873 | if (!strncmp("local:", lhostname, 6)) { |
| 874 | family = FamilyLocalHost; |
| 875 | NewHost(family, "", 0, FALSE); |
| 876 | LocalHostRequested = TRUE; /* Fix for XFree86 bug #156 */ |
| 877 | } |
| 878 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 879 | else if (!strncmp("inet:", lhostname, 5)) { |
| 880 | family = FamilyInternet; |
| 881 | hostname = ohostname + 5; |
| 882 | } |
| 883 | #if defined(IPv6) && defined(AF_INET6) |
| 884 | else if (!strncmp("inet6:", lhostname, 6)) { |
| 885 | family = FamilyInternet6; |
| 886 | hostname = ohostname + 6; |
| 887 | } |
| 888 | #endif |
| 889 | #endif |
| 890 | #ifdef SECURE_RPC |
| 891 | else if (!strncmp("nis:", lhostname, 4)) { |
| 892 | family = FamilyNetname; |
| 893 | hostname = ohostname + 4; |
| 894 | } |
| 895 | #endif |
| 896 | else if (!strncmp("si:", lhostname, 3)) { |
| 897 | family = FamilyServerInterpreted; |
| 898 | hostname = ohostname + 3; |
| 899 | hostlen -= 3; |
| 900 | } |
| 901 | |
| 902 | if (family == FamilyServerInterpreted) { |
| 903 | len = siCheckAddr(hostname, hostlen); |
| 904 | if (len >= 0) { |
| 905 | NewHost(family, hostname, len, FALSE); |
| 906 | } |
| 907 | } |
| 908 | else |
| 909 | #ifdef SECURE_RPC |
| 910 | if ((family == FamilyNetname) || (strchr(hostname, '@'))) { |
| 911 | SecureRPCInit(); |
| 912 | (void) NewHost(FamilyNetname, hostname, strlen(hostname), |
| 913 | FALSE); |
| 914 | } |
| 915 | else |
| 916 | #endif /* SECURE_RPC */ |
| 917 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 918 | { |
| 919 | #if defined(IPv6) && defined(AF_INET6) |
| 920 | if ((family == FamilyInternet) || (family == FamilyInternet6) || |
| 921 | (family == FamilyWild)) { |
| 922 | struct addrinfo *addresses; |
| 923 | struct addrinfo *a; |
| 924 | int f; |
| 925 | |
| 926 | if (getaddrinfo(hostname, NULL, NULL, &addresses) == 0) { |
| 927 | for (a = addresses; a != NULL; a = a->ai_next) { |
| 928 | len = a->ai_addrlen; |
| 929 | f = ConvertAddr(a->ai_addr, &len, |
| 930 | (pointer *) &addr); |
| 931 | if ((family == f) || |
| 932 | ((family == FamilyWild) && (f != -1))) { |
| 933 | NewHost(f, addr, len, FALSE); |
| 934 | } |
| 935 | } |
| 936 | freeaddrinfo(addresses); |
| 937 | } |
| 938 | } |
| 939 | #else |
| 940 | #ifdef XTHREADS_NEEDS_BYNAMEPARAMS |
| 941 | _Xgethostbynameparams hparams; |
| 942 | #endif |
| 943 | register struct hostent *hp; |
| 944 | |
| 945 | /* host name */ |
| 946 | if ((family == FamilyInternet && |
| 947 | ((hp = _XGethostbyname(hostname, hparams)) != 0)) || |
| 948 | ((hp = _XGethostbyname(hostname, hparams)) != 0)) { |
| 949 | saddr.sa.sa_family = hp->h_addrtype; |
| 950 | len = sizeof(saddr.sa); |
| 951 | if ((family = |
| 952 | ConvertAddr(&saddr.sa, &len, |
| 953 | (pointer *) &addr)) != -1) { |
| 954 | #ifdef h_addr /* new 4.3bsd version of gethostent */ |
| 955 | char **list; |
| 956 | |
| 957 | /* iterate over the addresses */ |
| 958 | for (list = hp->h_addr_list; *list; list++) |
| 959 | (void) NewHost(family, (pointer) *list, len, FALSE); |
| 960 | #else |
| 961 | (void) NewHost(family, (pointer) hp->h_addr, len, |
| 962 | FALSE); |
| 963 | #endif |
| 964 | } |
| 965 | } |
| 966 | #endif /* IPv6 */ |
| 967 | } |
| 968 | #endif /* TCPCONN || STREAMSCONN */ |
| 969 | family = FamilyWild; |
| 970 | } |
| 971 | fclose(fd); |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | /* Is client on the local host */ |
| 976 | Bool |
| 977 | ComputeLocalClient(ClientPtr client) |
| 978 | { |
| 979 | int alen, family, notused; |
| 980 | Xtransaddr *from = NULL; |
| 981 | pointer addr; |
| 982 | register HOST *host; |
| 983 | OsCommPtr oc = (OsCommPtr) client->osPrivate; |
| 984 | |
| 985 | if (!oc->trans_conn) |
| 986 | return FALSE; |
| 987 | |
| 988 | if (!_XSERVTransGetPeerAddr(oc->trans_conn, ¬used, &alen, &from)) { |
| 989 | family = ConvertAddr((struct sockaddr *) from, |
| 990 | &alen, (pointer *) &addr); |
| 991 | if (family == -1) { |
| 992 | free(from); |
| 993 | return FALSE; |
| 994 | } |
| 995 | if (family == FamilyLocal) { |
| 996 | free(from); |
| 997 | return TRUE; |
| 998 | } |
| 999 | for (host = selfhosts; host; host = host->next) { |
| 1000 | if (addrEqual(family, addr, alen, host)) { |
| 1001 | free(from); |
| 1002 | return TRUE; |
| 1003 | } |
| 1004 | } |
| 1005 | free(from); |
| 1006 | } |
| 1007 | return FALSE; |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * Return the uid and gid of a connected local client |
| 1012 | * |
| 1013 | * Used by XShm to test access rights to shared memory segments |
| 1014 | */ |
| 1015 | int |
| 1016 | LocalClientCred(ClientPtr client, int *pUid, int *pGid) |
| 1017 | { |
| 1018 | LocalClientCredRec *lcc; |
| 1019 | int ret = GetLocalClientCreds(client, &lcc); |
| 1020 | |
| 1021 | if (ret == 0) { |
| 1022 | #ifdef HAVE_GETZONEID /* only local if in the same zone */ |
| 1023 | if ((lcc->fieldsSet & LCC_ZID_SET) && (lcc->zoneid != getzoneid())) { |
| 1024 | FreeLocalClientCreds(lcc); |
| 1025 | return -1; |
| 1026 | } |
| 1027 | #endif |
| 1028 | if ((lcc->fieldsSet & LCC_UID_SET) && (pUid != NULL)) |
| 1029 | *pUid = lcc->euid; |
| 1030 | if ((lcc->fieldsSet & LCC_GID_SET) && (pGid != NULL)) |
| 1031 | *pGid = lcc->egid; |
| 1032 | FreeLocalClientCreds(lcc); |
| 1033 | } |
| 1034 | return ret; |
| 1035 | } |
| 1036 | |
| 1037 | /* |
| 1038 | * Return the uid and all gids of a connected local client |
| 1039 | * Allocates a LocalClientCredRec - caller must call FreeLocalClientCreds |
| 1040 | * |
| 1041 | * Used by localuser & localgroup ServerInterpreted access control forms below |
| 1042 | * Used by AuthAudit to log who local connections came from |
| 1043 | */ |
| 1044 | int |
| 1045 | GetLocalClientCreds(ClientPtr client, LocalClientCredRec ** lccp) |
| 1046 | { |
| 1047 | #if defined(HAVE_GETPEEREID) || defined(HAVE_GETPEERUCRED) || defined(SO_PEERCRED) |
| 1048 | int fd; |
| 1049 | XtransConnInfo ci; |
| 1050 | LocalClientCredRec *lcc; |
| 1051 | |
| 1052 | #ifdef HAVE_GETPEEREID |
| 1053 | uid_t uid; |
| 1054 | gid_t gid; |
| 1055 | #elif defined(HAVE_GETPEERUCRED) |
| 1056 | ucred_t *peercred = NULL; |
| 1057 | const gid_t *gids; |
| 1058 | #elif defined(SO_PEERCRED) |
| 1059 | struct ucred peercred; |
| 1060 | socklen_t so_len = sizeof(peercred); |
| 1061 | #endif |
| 1062 | |
| 1063 | if (client == NULL) |
| 1064 | return -1; |
| 1065 | ci = ((OsCommPtr) client->osPrivate)->trans_conn; |
| 1066 | #if !(defined(sun) && defined(HAVE_GETPEERUCRED)) |
| 1067 | /* Most implementations can only determine peer credentials for Unix |
| 1068 | * domain sockets - Solaris getpeerucred can work with a bit more, so |
| 1069 | * we just let it tell us if the connection type is supported or not |
| 1070 | */ |
| 1071 | if (!_XSERVTransIsLocal(ci)) { |
| 1072 | return -1; |
| 1073 | } |
| 1074 | #endif |
| 1075 | |
| 1076 | *lccp = calloc(1, sizeof(LocalClientCredRec)); |
| 1077 | if (*lccp == NULL) |
| 1078 | return -1; |
| 1079 | lcc = *lccp; |
| 1080 | |
| 1081 | fd = _XSERVTransGetConnectionNumber(ci); |
| 1082 | #ifdef HAVE_GETPEEREID |
| 1083 | if (getpeereid(fd, &uid, &gid) == -1) { |
| 1084 | FreeLocalClientCreds(lcc); |
| 1085 | return -1; |
| 1086 | } |
| 1087 | lcc->euid = uid; |
| 1088 | lcc->egid = gid; |
| 1089 | lcc->fieldsSet = LCC_UID_SET | LCC_GID_SET; |
| 1090 | return 0; |
| 1091 | #elif defined(HAVE_GETPEERUCRED) |
| 1092 | if (getpeerucred(fd, &peercred) < 0) { |
| 1093 | FreeLocalClientCreds(lcc); |
| 1094 | return -1; |
| 1095 | } |
| 1096 | lcc->euid = ucred_geteuid(peercred); |
| 1097 | if (lcc->euid != -1) |
| 1098 | lcc->fieldsSet |= LCC_UID_SET; |
| 1099 | lcc->egid = ucred_getegid(peercred); |
| 1100 | if (lcc->egid != -1) |
| 1101 | lcc->fieldsSet |= LCC_GID_SET; |
| 1102 | lcc->pid = ucred_getpid(peercred); |
| 1103 | if (lcc->pid != -1) |
| 1104 | lcc->fieldsSet |= LCC_PID_SET; |
| 1105 | #ifdef HAVE_GETZONEID |
| 1106 | lcc->zoneid = ucred_getzoneid(peercred); |
| 1107 | if (lcc->zoneid != -1) |
| 1108 | lcc->fieldsSet |= LCC_ZID_SET; |
| 1109 | #endif |
| 1110 | lcc->nSuppGids = ucred_getgroups(peercred, &gids); |
| 1111 | if (lcc->nSuppGids > 0) { |
| 1112 | lcc->pSuppGids = calloc(lcc->nSuppGids, sizeof(int)); |
| 1113 | if (lcc->pSuppGids == NULL) { |
| 1114 | lcc->nSuppGids = 0; |
| 1115 | } |
| 1116 | else { |
| 1117 | int i; |
| 1118 | |
| 1119 | for (i = 0; i < lcc->nSuppGids; i++) { |
| 1120 | (lcc->pSuppGids)[i] = (int) gids[i]; |
| 1121 | } |
| 1122 | } |
| 1123 | } |
| 1124 | else { |
| 1125 | lcc->nSuppGids = 0; |
| 1126 | } |
| 1127 | ucred_free(peercred); |
| 1128 | return 0; |
| 1129 | #elif defined(SO_PEERCRED) |
| 1130 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &peercred, &so_len) == -1) { |
| 1131 | FreeLocalClientCreds(lcc); |
| 1132 | return -1; |
| 1133 | } |
| 1134 | lcc->euid = peercred.uid; |
| 1135 | lcc->egid = peercred.gid; |
| 1136 | lcc->pid = peercred.pid; |
| 1137 | lcc->fieldsSet = LCC_UID_SET | LCC_GID_SET | LCC_PID_SET; |
| 1138 | return 0; |
| 1139 | #endif |
| 1140 | #else |
| 1141 | /* No system call available to get the credentials of the peer */ |
| 1142 | #define NO_LOCAL_CLIENT_CRED |
| 1143 | return -1; |
| 1144 | #endif |
| 1145 | } |
| 1146 | |
| 1147 | void |
| 1148 | FreeLocalClientCreds(LocalClientCredRec * lcc) |
| 1149 | { |
| 1150 | if (lcc != NULL) { |
| 1151 | if (lcc->nSuppGids > 0) { |
| 1152 | free(lcc->pSuppGids); |
| 1153 | } |
| 1154 | free(lcc); |
| 1155 | } |
| 1156 | } |
| 1157 | |
| 1158 | static int |
| 1159 | AuthorizedClient(ClientPtr client) |
| 1160 | { |
| 1161 | int rc; |
| 1162 | |
| 1163 | if (!client || defeatAccessControl) |
| 1164 | return Success; |
| 1165 | |
| 1166 | /* untrusted clients can't change host access */ |
| 1167 | rc = XaceHook(XACE_SERVER_ACCESS, client, DixManageAccess); |
| 1168 | if (rc != Success) |
| 1169 | return rc; |
| 1170 | |
| 1171 | return client->local ? Success : BadAccess; |
| 1172 | } |
| 1173 | |
| 1174 | /* Add a host to the access control list. This is the external interface |
| 1175 | * called from the dispatcher */ |
| 1176 | |
| 1177 | int |
| 1178 | AddHost(ClientPtr client, int family, unsigned length, /* of bytes in pAddr */ |
| 1179 | const void *pAddr) |
| 1180 | { |
| 1181 | int rc, len; |
| 1182 | |
| 1183 | rc = AuthorizedClient(client); |
| 1184 | if (rc != Success) |
| 1185 | return rc; |
| 1186 | switch (family) { |
| 1187 | case FamilyLocalHost: |
| 1188 | len = length; |
| 1189 | LocalHostEnabled = TRUE; |
| 1190 | break; |
| 1191 | #ifdef SECURE_RPC |
| 1192 | case FamilyNetname: |
| 1193 | len = length; |
| 1194 | SecureRPCInit(); |
| 1195 | break; |
| 1196 | #endif |
| 1197 | case FamilyInternet: |
| 1198 | #if defined(IPv6) && defined(AF_INET6) |
| 1199 | case FamilyInternet6: |
| 1200 | #endif |
| 1201 | case FamilyDECnet: |
| 1202 | case FamilyChaos: |
| 1203 | case FamilyServerInterpreted: |
| 1204 | if ((len = CheckAddr(family, pAddr, length)) < 0) { |
| 1205 | client->errorValue = length; |
| 1206 | return BadValue; |
| 1207 | } |
| 1208 | break; |
| 1209 | case FamilyLocal: |
| 1210 | default: |
| 1211 | client->errorValue = family; |
| 1212 | return BadValue; |
| 1213 | } |
| 1214 | if (NewHost(family, pAddr, len, FALSE)) |
| 1215 | return Success; |
| 1216 | return BadAlloc; |
| 1217 | } |
| 1218 | |
| 1219 | Bool |
| 1220 | ForEachHostInFamily(int family, Bool (*func) (unsigned char * /* addr */ , |
| 1221 | short /* len */ , |
| 1222 | pointer /* closure */ ), |
| 1223 | pointer closure) |
| 1224 | { |
| 1225 | HOST *host; |
| 1226 | |
| 1227 | for (host = validhosts; host; host = host->next) |
| 1228 | if (family == host->family && func(host->addr, host->len, closure)) |
| 1229 | return TRUE; |
| 1230 | return FALSE; |
| 1231 | } |
| 1232 | |
| 1233 | /* Add a host to the access control list. This is the internal interface |
| 1234 | * called when starting or resetting the server */ |
| 1235 | static Bool |
| 1236 | NewHost(int family, const void *addr, int len, int addingLocalHosts) |
| 1237 | { |
| 1238 | register HOST *host; |
| 1239 | |
| 1240 | for (host = validhosts; host; host = host->next) { |
| 1241 | if (addrEqual(family, addr, len, host)) |
| 1242 | return TRUE; |
| 1243 | } |
| 1244 | if (!addingLocalHosts) { /* Fix for XFree86 bug #156 */ |
| 1245 | for (host = selfhosts; host; host = host->next) { |
| 1246 | if (addrEqual(family, addr, len, host)) { |
| 1247 | host->requested = TRUE; |
| 1248 | break; |
| 1249 | } |
| 1250 | } |
| 1251 | } |
| 1252 | MakeHost(host, len) |
| 1253 | if (!host) |
| 1254 | return FALSE; |
| 1255 | host->family = family; |
| 1256 | host->len = len; |
| 1257 | memcpy(host->addr, addr, len); |
| 1258 | host->next = validhosts; |
| 1259 | validhosts = host; |
| 1260 | return TRUE; |
| 1261 | } |
| 1262 | |
| 1263 | /* Remove a host from the access control list */ |
| 1264 | |
| 1265 | int |
| 1266 | RemoveHost(ClientPtr client, int family, unsigned length, /* of bytes in pAddr */ |
| 1267 | pointer pAddr) |
| 1268 | { |
| 1269 | int rc, len; |
| 1270 | register HOST *host, **prev; |
| 1271 | |
| 1272 | rc = AuthorizedClient(client); |
| 1273 | if (rc != Success) |
| 1274 | return rc; |
| 1275 | switch (family) { |
| 1276 | case FamilyLocalHost: |
| 1277 | len = length; |
| 1278 | LocalHostEnabled = FALSE; |
| 1279 | break; |
| 1280 | #ifdef SECURE_RPC |
| 1281 | case FamilyNetname: |
| 1282 | len = length; |
| 1283 | break; |
| 1284 | #endif |
| 1285 | case FamilyInternet: |
| 1286 | #if defined(IPv6) && defined(AF_INET6) |
| 1287 | case FamilyInternet6: |
| 1288 | #endif |
| 1289 | case FamilyDECnet: |
| 1290 | case FamilyChaos: |
| 1291 | case FamilyServerInterpreted: |
| 1292 | if ((len = CheckAddr(family, pAddr, length)) < 0) { |
| 1293 | client->errorValue = length; |
| 1294 | return BadValue; |
| 1295 | } |
| 1296 | break; |
| 1297 | case FamilyLocal: |
| 1298 | default: |
| 1299 | client->errorValue = family; |
| 1300 | return BadValue; |
| 1301 | } |
| 1302 | for (prev = &validhosts; |
| 1303 | (host = *prev) && (!addrEqual(family, pAddr, len, host)); |
| 1304 | prev = &host->next); |
| 1305 | if (host) { |
| 1306 | *prev = host->next; |
| 1307 | FreeHost(host); |
| 1308 | } |
| 1309 | return Success; |
| 1310 | } |
| 1311 | |
| 1312 | /* Get all hosts in the access control list */ |
| 1313 | int |
| 1314 | GetHosts(pointer *data, int *pnHosts, int *pLen, BOOL * pEnabled) |
| 1315 | { |
| 1316 | int len; |
| 1317 | register int n = 0; |
| 1318 | register unsigned char *ptr; |
| 1319 | register HOST *host; |
| 1320 | int nHosts = 0; |
| 1321 | |
| 1322 | *pEnabled = AccessEnabled ? EnableAccess : DisableAccess; |
| 1323 | for (host = validhosts; host; host = host->next) { |
| 1324 | nHosts++; |
| 1325 | n += pad_to_int32(host->len) + sizeof(xHostEntry); |
| 1326 | } |
| 1327 | if (n) { |
| 1328 | *data = ptr = malloc(n); |
| 1329 | if (!ptr) { |
| 1330 | return BadAlloc; |
| 1331 | } |
| 1332 | for (host = validhosts; host; host = host->next) { |
| 1333 | len = host->len; |
| 1334 | ((xHostEntry *) ptr)->family = host->family; |
| 1335 | ((xHostEntry *) ptr)->length = len; |
| 1336 | ptr += sizeof(xHostEntry); |
| 1337 | memcpy(ptr, host->addr, len); |
| 1338 | ptr += pad_to_int32(len); |
| 1339 | } |
| 1340 | } |
| 1341 | else { |
| 1342 | *data = NULL; |
| 1343 | } |
| 1344 | *pnHosts = nHosts; |
| 1345 | *pLen = n; |
| 1346 | return Success; |
| 1347 | } |
| 1348 | |
| 1349 | /* Check for valid address family and length, and return address length. */ |
| 1350 | |
| 1351 | /*ARGSUSED*/ static int |
| 1352 | CheckAddr(int family, const void *pAddr, unsigned length) |
| 1353 | { |
| 1354 | int len; |
| 1355 | |
| 1356 | switch (family) { |
| 1357 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 1358 | case FamilyInternet: |
| 1359 | if (length == sizeof(struct in_addr)) |
| 1360 | len = length; |
| 1361 | else |
| 1362 | len = -1; |
| 1363 | break; |
| 1364 | #if defined(IPv6) && defined(AF_INET6) |
| 1365 | case FamilyInternet6: |
| 1366 | if (length == sizeof(struct in6_addr)) |
| 1367 | len = length; |
| 1368 | else |
| 1369 | len = -1; |
| 1370 | break; |
| 1371 | #endif |
| 1372 | #endif |
| 1373 | case FamilyServerInterpreted: |
| 1374 | len = siCheckAddr(pAddr, length); |
| 1375 | break; |
| 1376 | default: |
| 1377 | len = -1; |
| 1378 | } |
| 1379 | return len; |
| 1380 | } |
| 1381 | |
| 1382 | /* Check if a host is not in the access control list. |
| 1383 | * Returns 1 if host is invalid, 0 if we've found it. */ |
| 1384 | |
| 1385 | int |
| 1386 | InvalidHost(register struct sockaddr *saddr, int len, ClientPtr client) |
| 1387 | { |
| 1388 | int family; |
| 1389 | pointer addr; |
| 1390 | register HOST *selfhost, *host; |
| 1391 | |
| 1392 | if (!AccessEnabled) /* just let them in */ |
| 1393 | return 0; |
| 1394 | family = ConvertAddr(saddr, &len, (pointer *) &addr); |
| 1395 | if (family == -1) |
| 1396 | return 1; |
| 1397 | if (family == FamilyLocal) { |
| 1398 | if (!LocalHostEnabled) { |
| 1399 | /* |
| 1400 | * check to see if any local address is enabled. This |
| 1401 | * implicitly enables local connections. |
| 1402 | */ |
| 1403 | for (selfhost = selfhosts; selfhost; selfhost = selfhost->next) { |
| 1404 | for (host = validhosts; host; host = host->next) { |
| 1405 | if (addrEqual(selfhost->family, selfhost->addr, |
| 1406 | selfhost->len, host)) |
| 1407 | return 0; |
| 1408 | } |
| 1409 | } |
| 1410 | } |
| 1411 | else |
| 1412 | return 0; |
| 1413 | } |
| 1414 | for (host = validhosts; host; host = host->next) { |
| 1415 | if (host->family == FamilyServerInterpreted) { |
| 1416 | if (siAddrMatch(family, addr, len, host, client)) { |
| 1417 | return 0; |
| 1418 | } |
| 1419 | } |
| 1420 | else { |
| 1421 | if (addrEqual(family, addr, len, host)) |
| 1422 | return 0; |
| 1423 | } |
| 1424 | |
| 1425 | } |
| 1426 | return 1; |
| 1427 | } |
| 1428 | |
| 1429 | static int |
| 1430 | ConvertAddr(register struct sockaddr *saddr, int *len, pointer *addr) |
| 1431 | { |
| 1432 | if (*len == 0) |
| 1433 | return FamilyLocal; |
| 1434 | switch (saddr->sa_family) { |
| 1435 | case AF_UNSPEC: |
| 1436 | #if defined(UNIXCONN) || defined(LOCALCONN) |
| 1437 | case AF_UNIX: |
| 1438 | #endif |
| 1439 | return FamilyLocal; |
| 1440 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 1441 | case AF_INET: |
| 1442 | #ifdef WIN32 |
| 1443 | if (16777343 == *(long *) &((struct sockaddr_in *) saddr)->sin_addr) |
| 1444 | return FamilyLocal; |
| 1445 | #endif |
| 1446 | *len = sizeof(struct in_addr); |
| 1447 | *addr = (pointer) &(((struct sockaddr_in *) saddr)->sin_addr); |
| 1448 | return FamilyInternet; |
| 1449 | #if defined(IPv6) && defined(AF_INET6) |
| 1450 | case AF_INET6: |
| 1451 | { |
| 1452 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *) saddr; |
| 1453 | |
| 1454 | if (IN6_IS_ADDR_V4MAPPED(&(saddr6->sin6_addr))) { |
| 1455 | *len = sizeof(struct in_addr); |
| 1456 | *addr = (pointer) &(saddr6->sin6_addr.s6_addr[12]); |
| 1457 | return FamilyInternet; |
| 1458 | } |
| 1459 | else { |
| 1460 | *len = sizeof(struct in6_addr); |
| 1461 | *addr = (pointer) &(saddr6->sin6_addr); |
| 1462 | return FamilyInternet6; |
| 1463 | } |
| 1464 | } |
| 1465 | #endif |
| 1466 | #endif |
| 1467 | default: |
| 1468 | return -1; |
| 1469 | } |
| 1470 | } |
| 1471 | |
| 1472 | int |
| 1473 | ChangeAccessControl(ClientPtr client, int fEnabled) |
| 1474 | { |
| 1475 | int rc = AuthorizedClient(client); |
| 1476 | |
| 1477 | if (rc != Success) |
| 1478 | return rc; |
| 1479 | AccessEnabled = fEnabled; |
| 1480 | return Success; |
| 1481 | } |
| 1482 | |
| 1483 | /* returns FALSE if xhost + in effect, else TRUE */ |
| 1484 | int |
| 1485 | GetAccessControl(void) |
| 1486 | { |
| 1487 | return AccessEnabled; |
| 1488 | } |
| 1489 | |
| 1490 | /***************************************************************************** |
| 1491 | * FamilyServerInterpreted host entry implementation |
| 1492 | * |
| 1493 | * Supports an extensible system of host types which the server can interpret |
| 1494 | * See the IPv6 extensions to the X11 protocol spec for the definition. |
| 1495 | * |
| 1496 | * Currently supported schemes: |
| 1497 | * |
| 1498 | * hostname - hostname as defined in IETF RFC 2396 |
| 1499 | * ipv6 - IPv6 literal address as defined in IETF RFC's 3513 and <TBD> |
| 1500 | * |
| 1501 | * See xc/doc/specs/SIAddresses for formal definitions of each type. |
| 1502 | */ |
| 1503 | |
| 1504 | /* These definitions and the siTypeAdd function could be exported in the |
| 1505 | * future to enable loading additional host types, but that was not done for |
| 1506 | * the initial implementation. |
| 1507 | */ |
| 1508 | typedef Bool (*siAddrMatchFunc) (int family, pointer addr, int len, |
| 1509 | const char *siAddr, int siAddrlen, |
| 1510 | ClientPtr client, void *siTypePriv); |
| 1511 | typedef int (*siCheckAddrFunc) (const char *addrString, int length, |
| 1512 | void *siTypePriv); |
| 1513 | |
| 1514 | struct siType { |
| 1515 | struct siType *next; |
| 1516 | const char *typeName; |
| 1517 | siAddrMatchFunc addrMatch; |
| 1518 | siCheckAddrFunc checkAddr; |
| 1519 | void *typePriv; /* Private data for type routines */ |
| 1520 | }; |
| 1521 | |
| 1522 | static struct siType *siTypeList; |
| 1523 | |
| 1524 | static int |
| 1525 | siTypeAdd(const char *typeName, siAddrMatchFunc addrMatch, |
| 1526 | siCheckAddrFunc checkAddr, void *typePriv) |
| 1527 | { |
| 1528 | struct siType *s, *p; |
| 1529 | |
| 1530 | if ((typeName == NULL) || (addrMatch == NULL) || (checkAddr == NULL)) |
| 1531 | return BadValue; |
| 1532 | |
| 1533 | for (s = siTypeList, p = NULL; s != NULL; p = s, s = s->next) { |
| 1534 | if (strcmp(typeName, s->typeName) == 0) { |
| 1535 | s->addrMatch = addrMatch; |
| 1536 | s->checkAddr = checkAddr; |
| 1537 | s->typePriv = typePriv; |
| 1538 | return Success; |
| 1539 | } |
| 1540 | } |
| 1541 | |
| 1542 | s = malloc(sizeof(struct siType)); |
| 1543 | if (s == NULL) |
| 1544 | return BadAlloc; |
| 1545 | |
| 1546 | if (p == NULL) |
| 1547 | siTypeList = s; |
| 1548 | else |
| 1549 | p->next = s; |
| 1550 | |
| 1551 | s->next = NULL; |
| 1552 | s->typeName = typeName; |
| 1553 | s->addrMatch = addrMatch; |
| 1554 | s->checkAddr = checkAddr; |
| 1555 | s->typePriv = typePriv; |
| 1556 | return Success; |
| 1557 | } |
| 1558 | |
| 1559 | /* Checks to see if a host matches a server-interpreted host entry */ |
| 1560 | static Bool |
| 1561 | siAddrMatch(int family, pointer addr, int len, HOST * host, ClientPtr client) |
| 1562 | { |
| 1563 | Bool matches = FALSE; |
| 1564 | struct siType *s; |
| 1565 | const char *valueString; |
| 1566 | int addrlen; |
| 1567 | |
| 1568 | valueString = (const char *) memchr(host->addr, '\0', host->len); |
| 1569 | if (valueString != NULL) { |
| 1570 | for (s = siTypeList; s != NULL; s = s->next) { |
| 1571 | if (strcmp((char *) host->addr, s->typeName) == 0) { |
| 1572 | addrlen = host->len - (strlen((char *) host->addr) + 1); |
| 1573 | matches = s->addrMatch(family, addr, len, |
| 1574 | valueString + 1, addrlen, client, |
| 1575 | s->typePriv); |
| 1576 | break; |
| 1577 | } |
| 1578 | } |
| 1579 | #ifdef FAMILY_SI_DEBUG |
| 1580 | ErrorF("Xserver: siAddrMatch(): type = %s, value = %*.*s -- %s\n", |
| 1581 | host->addr, addrlen, addrlen, valueString + 1, |
| 1582 | (matches) ? "accepted" : "rejected"); |
| 1583 | #endif |
| 1584 | } |
| 1585 | return matches; |
| 1586 | } |
| 1587 | |
| 1588 | static int |
| 1589 | siCheckAddr(const char *addrString, int length) |
| 1590 | { |
| 1591 | const char *valueString; |
| 1592 | int addrlen, typelen; |
| 1593 | int len = -1; |
| 1594 | struct siType *s; |
| 1595 | |
| 1596 | /* Make sure there is a \0 byte inside the specified length |
| 1597 | to separate the address type from the address value. */ |
| 1598 | valueString = (const char *) memchr(addrString, '\0', length); |
| 1599 | if (valueString != NULL) { |
| 1600 | /* Make sure the first string is a recognized address type, |
| 1601 | * and the second string is a valid address of that type. |
| 1602 | */ |
| 1603 | typelen = strlen(addrString) + 1; |
| 1604 | addrlen = length - typelen; |
| 1605 | |
| 1606 | for (s = siTypeList; s != NULL; s = s->next) { |
| 1607 | if (strcmp(addrString, s->typeName) == 0) { |
| 1608 | len = s->checkAddr(valueString + 1, addrlen, s->typePriv); |
| 1609 | if (len >= 0) { |
| 1610 | len += typelen; |
| 1611 | } |
| 1612 | break; |
| 1613 | } |
| 1614 | } |
| 1615 | #ifdef FAMILY_SI_DEBUG |
| 1616 | { |
| 1617 | const char *resultMsg; |
| 1618 | |
| 1619 | if (s == NULL) { |
| 1620 | resultMsg = "type not registered"; |
| 1621 | } |
| 1622 | else { |
| 1623 | if (len == -1) |
| 1624 | resultMsg = "rejected"; |
| 1625 | else |
| 1626 | resultMsg = "accepted"; |
| 1627 | } |
| 1628 | |
| 1629 | ErrorF |
| 1630 | ("Xserver: siCheckAddr(): type = %s, value = %*.*s, len = %d -- %s\n", |
| 1631 | addrString, addrlen, addrlen, valueString + 1, len, resultMsg); |
| 1632 | } |
| 1633 | #endif |
| 1634 | } |
| 1635 | return len; |
| 1636 | } |
| 1637 | |
| 1638 | /*** |
| 1639 | * Hostname server-interpreted host type |
| 1640 | * |
| 1641 | * Stored as hostname string, explicitly defined to be resolved ONLY |
| 1642 | * at access check time, to allow for hosts with dynamic addresses |
| 1643 | * but static hostnames, such as found in some DHCP & mobile setups. |
| 1644 | * |
| 1645 | * Hostname must conform to IETF RFC 2396 sec. 3.2.2, which defines it as: |
| 1646 | * hostname = *( domainlabel "." ) toplabel [ "." ] |
| 1647 | * domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum |
| 1648 | * toplabel = alpha | alpha *( alphanum | "-" ) alphanum |
| 1649 | */ |
| 1650 | |
| 1651 | #ifdef NI_MAXHOST |
| 1652 | #define SI_HOSTNAME_MAXLEN NI_MAXHOST |
| 1653 | #else |
| 1654 | #ifdef MAXHOSTNAMELEN |
| 1655 | #define SI_HOSTNAME_MAXLEN MAXHOSTNAMELEN |
| 1656 | #else |
| 1657 | #define SI_HOSTNAME_MAXLEN 256 |
| 1658 | #endif |
| 1659 | #endif |
| 1660 | |
| 1661 | static Bool |
| 1662 | siHostnameAddrMatch(int family, pointer addr, int len, |
| 1663 | const char *siAddr, int siAddrLen, ClientPtr client, |
| 1664 | void *typePriv) |
| 1665 | { |
| 1666 | Bool res = FALSE; |
| 1667 | |
| 1668 | /* Currently only supports checking against IPv4 & IPv6 connections, but |
| 1669 | * support for other address families, such as DECnet, could be added if |
| 1670 | * desired. |
| 1671 | */ |
| 1672 | #if defined(IPv6) && defined(AF_INET6) |
| 1673 | if ((family == FamilyInternet) || (family == FamilyInternet6)) { |
| 1674 | char hostname[SI_HOSTNAME_MAXLEN]; |
| 1675 | struct addrinfo *addresses; |
| 1676 | struct addrinfo *a; |
| 1677 | int f, hostaddrlen; |
| 1678 | pointer hostaddr; |
| 1679 | |
| 1680 | if (siAddrLen >= sizeof(hostname)) |
| 1681 | return FALSE; |
| 1682 | |
| 1683 | strlcpy(hostname, siAddr, siAddrLen + 1); |
| 1684 | |
| 1685 | if (getaddrinfo(hostname, NULL, NULL, &addresses) == 0) { |
| 1686 | for (a = addresses; a != NULL; a = a->ai_next) { |
| 1687 | hostaddrlen = a->ai_addrlen; |
| 1688 | f = ConvertAddr(a->ai_addr, &hostaddrlen, &hostaddr); |
| 1689 | if ((f == family) && (len == hostaddrlen) && |
| 1690 | (memcmp(addr, hostaddr, len) == 0)) { |
| 1691 | res = TRUE; |
| 1692 | break; |
| 1693 | } |
| 1694 | } |
| 1695 | freeaddrinfo(addresses); |
| 1696 | } |
| 1697 | } |
| 1698 | #else /* IPv6 not supported, use gethostbyname instead for IPv4 */ |
| 1699 | if (family == FamilyInternet) { |
| 1700 | register struct hostent *hp; |
| 1701 | |
| 1702 | #ifdef XTHREADS_NEEDS_BYNAMEPARAMS |
| 1703 | _Xgethostbynameparams hparams; |
| 1704 | #endif |
| 1705 | char hostname[SI_HOSTNAME_MAXLEN]; |
| 1706 | int f, hostaddrlen; |
| 1707 | pointer hostaddr; |
| 1708 | const char **addrlist; |
| 1709 | |
| 1710 | if (siAddrLen >= sizeof(hostname)) |
| 1711 | return FALSE; |
| 1712 | |
| 1713 | strlcpy(hostname, siAddr, siAddrLen + 1); |
| 1714 | |
| 1715 | if ((hp = _XGethostbyname(hostname, hparams)) != NULL) { |
| 1716 | #ifdef h_addr /* new 4.3bsd version of gethostent */ |
| 1717 | /* iterate over the addresses */ |
| 1718 | for (addrlist = hp->h_addr_list; *addrlist; addrlist++) |
| 1719 | #else |
| 1720 | addrlist = &hp->h_addr; |
| 1721 | #endif |
| 1722 | { |
| 1723 | struct sockaddr_in sin; |
| 1724 | |
| 1725 | sin.sin_family = hp->h_addrtype; |
| 1726 | memcpy(&(sin.sin_addr), *addrlist, hp->h_length); |
| 1727 | hostaddrlen = sizeof(sin); |
| 1728 | f = ConvertAddr((struct sockaddr *) &sin, |
| 1729 | &hostaddrlen, &hostaddr); |
| 1730 | if ((f == family) && (len == hostaddrlen) && |
| 1731 | (memcmp(addr, hostaddr, len) == 0)) { |
| 1732 | res = TRUE; |
| 1733 | break; |
| 1734 | } |
| 1735 | } |
| 1736 | } |
| 1737 | } |
| 1738 | #endif |
| 1739 | return res; |
| 1740 | } |
| 1741 | |
| 1742 | static int |
| 1743 | siHostnameCheckAddr(const char *valueString, int length, void *typePriv) |
| 1744 | { |
| 1745 | /* Check conformance of hostname to RFC 2396 sec. 3.2.2 definition. |
| 1746 | * We do not use ctype functions here to avoid locale-specific |
| 1747 | * character sets. Hostnames must be pure ASCII. |
| 1748 | */ |
| 1749 | int len = length; |
| 1750 | int i; |
| 1751 | Bool dotAllowed = FALSE; |
| 1752 | Bool dashAllowed = FALSE; |
| 1753 | |
| 1754 | if ((length <= 0) || (length >= SI_HOSTNAME_MAXLEN)) { |
| 1755 | len = -1; |
| 1756 | } |
| 1757 | else { |
| 1758 | for (i = 0; i < length; i++) { |
| 1759 | char c = valueString[i]; |
| 1760 | |
| 1761 | if (c == 0x2E) { /* '.' */ |
| 1762 | if (dotAllowed == FALSE) { |
| 1763 | len = -1; |
| 1764 | break; |
| 1765 | } |
| 1766 | else { |
| 1767 | dotAllowed = FALSE; |
| 1768 | dashAllowed = FALSE; |
| 1769 | } |
| 1770 | } |
| 1771 | else if (c == 0x2D) { /* '-' */ |
| 1772 | if (dashAllowed == FALSE) { |
| 1773 | len = -1; |
| 1774 | break; |
| 1775 | } |
| 1776 | else { |
| 1777 | dotAllowed = FALSE; |
| 1778 | } |
| 1779 | } |
| 1780 | else if (((c >= 0x30) && (c <= 0x3A)) /* 0-9 */ || |
| 1781 | ((c >= 0x61) && (c <= 0x7A)) /* a-z */ || |
| 1782 | ((c >= 0x41) && (c <= 0x5A)) /* A-Z */ ) { |
| 1783 | dotAllowed = TRUE; |
| 1784 | dashAllowed = TRUE; |
| 1785 | } |
| 1786 | else { /* Invalid character */ |
| 1787 | len = -1; |
| 1788 | break; |
| 1789 | } |
| 1790 | } |
| 1791 | } |
| 1792 | return len; |
| 1793 | } |
| 1794 | |
| 1795 | #if defined(IPv6) && defined(AF_INET6) |
| 1796 | /*** |
| 1797 | * "ipv6" server interpreted type |
| 1798 | * |
| 1799 | * Currently supports only IPv6 literal address as specified in IETF RFC 3513 |
| 1800 | * |
| 1801 | * Once draft-ietf-ipv6-scoping-arch-00.txt becomes an RFC, support will be |
| 1802 | * added for the scoped address format it specifies. |
| 1803 | */ |
| 1804 | |
| 1805 | /* Maximum length of an IPv6 address string - increase when adding support |
| 1806 | * for scoped address qualifiers. Includes room for trailing NUL byte. |
| 1807 | */ |
| 1808 | #define SI_IPv6_MAXLEN INET6_ADDRSTRLEN |
| 1809 | |
| 1810 | static Bool |
| 1811 | siIPv6AddrMatch(int family, pointer addr, int len, |
| 1812 | const char *siAddr, int siAddrlen, ClientPtr client, |
| 1813 | void *typePriv) |
| 1814 | { |
| 1815 | struct in6_addr addr6; |
| 1816 | char addrbuf[SI_IPv6_MAXLEN]; |
| 1817 | |
| 1818 | if ((family != FamilyInternet6) || (len != sizeof(addr6))) |
| 1819 | return FALSE; |
| 1820 | |
| 1821 | memcpy(addrbuf, siAddr, siAddrlen); |
| 1822 | addrbuf[siAddrlen] = '\0'; |
| 1823 | |
| 1824 | if (inet_pton(AF_INET6, addrbuf, &addr6) != 1) { |
| 1825 | perror("inet_pton"); |
| 1826 | return FALSE; |
| 1827 | } |
| 1828 | |
| 1829 | if (memcmp(addr, &addr6, len) == 0) { |
| 1830 | return TRUE; |
| 1831 | } |
| 1832 | else { |
| 1833 | return FALSE; |
| 1834 | } |
| 1835 | } |
| 1836 | |
| 1837 | static int |
| 1838 | siIPv6CheckAddr(const char *addrString, int length, void *typePriv) |
| 1839 | { |
| 1840 | int len; |
| 1841 | |
| 1842 | /* Minimum length is 3 (smallest legal address is "::1") */ |
| 1843 | if (length < 3) { |
| 1844 | /* Address is too short! */ |
| 1845 | len = -1; |
| 1846 | } |
| 1847 | else if (length >= SI_IPv6_MAXLEN) { |
| 1848 | /* Address is too long! */ |
| 1849 | len = -1; |
| 1850 | } |
| 1851 | else { |
| 1852 | /* Assume inet_pton is sufficient validation */ |
| 1853 | struct in6_addr addr6; |
| 1854 | char addrbuf[SI_IPv6_MAXLEN]; |
| 1855 | |
| 1856 | memcpy(addrbuf, addrString, length); |
| 1857 | addrbuf[length] = '\0'; |
| 1858 | |
| 1859 | if (inet_pton(AF_INET6, addrbuf, &addr6) != 1) { |
| 1860 | perror("inet_pton"); |
| 1861 | len = -1; |
| 1862 | } |
| 1863 | else { |
| 1864 | len = length; |
| 1865 | } |
| 1866 | } |
| 1867 | return len; |
| 1868 | } |
| 1869 | #endif /* IPv6 */ |
| 1870 | |
| 1871 | #if !defined(NO_LOCAL_CLIENT_CRED) |
| 1872 | /*** |
| 1873 | * "localuser" & "localgroup" server interpreted types |
| 1874 | * |
| 1875 | * Allows local connections from a given local user or group |
| 1876 | */ |
| 1877 | |
| 1878 | #include <pwd.h> |
| 1879 | #include <grp.h> |
| 1880 | |
| 1881 | #define LOCAL_USER 1 |
| 1882 | #define LOCAL_GROUP 2 |
| 1883 | |
| 1884 | typedef struct { |
| 1885 | int credType; |
| 1886 | } siLocalCredPrivRec, *siLocalCredPrivPtr; |
| 1887 | |
| 1888 | static siLocalCredPrivRec siLocalUserPriv = { LOCAL_USER }; |
| 1889 | static siLocalCredPrivRec siLocalGroupPriv = { LOCAL_GROUP }; |
| 1890 | |
| 1891 | static Bool |
| 1892 | siLocalCredGetId(const char *addr, int len, siLocalCredPrivPtr lcPriv, int *id) |
| 1893 | { |
| 1894 | Bool parsedOK = FALSE; |
| 1895 | char *addrbuf = malloc(len + 1); |
| 1896 | |
| 1897 | if (addrbuf == NULL) { |
| 1898 | return FALSE; |
| 1899 | } |
| 1900 | |
| 1901 | memcpy(addrbuf, addr, len); |
| 1902 | addrbuf[len] = '\0'; |
| 1903 | |
| 1904 | if (addr[0] == '#') { /* numeric id */ |
| 1905 | char *cp; |
| 1906 | |
| 1907 | errno = 0; |
| 1908 | *id = strtol(addrbuf + 1, &cp, 0); |
| 1909 | if ((errno == 0) && (cp != (addrbuf + 1))) { |
| 1910 | parsedOK = TRUE; |
| 1911 | } |
| 1912 | } |
| 1913 | else { /* non-numeric name */ |
| 1914 | if (lcPriv->credType == LOCAL_USER) { |
| 1915 | struct passwd *pw = getpwnam(addrbuf); |
| 1916 | |
| 1917 | if (pw != NULL) { |
| 1918 | *id = (int) pw->pw_uid; |
| 1919 | parsedOK = TRUE; |
| 1920 | } |
| 1921 | } |
| 1922 | else { /* group */ |
| 1923 | struct group *gr = getgrnam(addrbuf); |
| 1924 | |
| 1925 | if (gr != NULL) { |
| 1926 | *id = (int) gr->gr_gid; |
| 1927 | parsedOK = TRUE; |
| 1928 | } |
| 1929 | } |
| 1930 | } |
| 1931 | |
| 1932 | free(addrbuf); |
| 1933 | return parsedOK; |
| 1934 | } |
| 1935 | |
| 1936 | static Bool |
| 1937 | siLocalCredAddrMatch(int family, pointer addr, int len, |
| 1938 | const char *siAddr, int siAddrlen, ClientPtr client, |
| 1939 | void *typePriv) |
| 1940 | { |
| 1941 | int siAddrId; |
| 1942 | LocalClientCredRec *lcc; |
| 1943 | siLocalCredPrivPtr lcPriv = (siLocalCredPrivPtr) typePriv; |
| 1944 | |
| 1945 | if (GetLocalClientCreds(client, &lcc) == -1) { |
| 1946 | return FALSE; |
| 1947 | } |
| 1948 | |
| 1949 | #ifdef HAVE_GETZONEID /* Ensure process is in the same zone */ |
| 1950 | if ((lcc->fieldsSet & LCC_ZID_SET) && (lcc->zoneid != getzoneid())) { |
| 1951 | FreeLocalClientCreds(lcc); |
| 1952 | return FALSE; |
| 1953 | } |
| 1954 | #endif |
| 1955 | |
| 1956 | if (siLocalCredGetId(siAddr, siAddrlen, lcPriv, &siAddrId) == FALSE) { |
| 1957 | FreeLocalClientCreds(lcc); |
| 1958 | return FALSE; |
| 1959 | } |
| 1960 | |
| 1961 | if (lcPriv->credType == LOCAL_USER) { |
| 1962 | if ((lcc->fieldsSet & LCC_UID_SET) && (lcc->euid == siAddrId)) { |
| 1963 | FreeLocalClientCreds(lcc); |
| 1964 | return TRUE; |
| 1965 | } |
| 1966 | } |
| 1967 | else { |
| 1968 | if ((lcc->fieldsSet & LCC_GID_SET) && (lcc->egid == siAddrId)) { |
| 1969 | FreeLocalClientCreds(lcc); |
| 1970 | return TRUE; |
| 1971 | } |
| 1972 | if (lcc->pSuppGids != NULL) { |
| 1973 | int i; |
| 1974 | |
| 1975 | for (i = 0; i < lcc->nSuppGids; i++) { |
| 1976 | if (lcc->pSuppGids[i] == siAddrId) { |
| 1977 | FreeLocalClientCreds(lcc); |
| 1978 | return TRUE; |
| 1979 | } |
| 1980 | } |
| 1981 | } |
| 1982 | } |
| 1983 | FreeLocalClientCreds(lcc); |
| 1984 | return FALSE; |
| 1985 | } |
| 1986 | |
| 1987 | static int |
| 1988 | siLocalCredCheckAddr(const char *addrString, int length, void *typePriv) |
| 1989 | { |
| 1990 | int len = length; |
| 1991 | int id; |
| 1992 | |
| 1993 | if (siLocalCredGetId(addrString, length, |
| 1994 | (siLocalCredPrivPtr) typePriv, &id) == FALSE) { |
| 1995 | len = -1; |
| 1996 | } |
| 1997 | return len; |
| 1998 | } |
| 1999 | #endif /* localuser */ |
| 2000 | |
| 2001 | static void |
| 2002 | siTypesInitialize(void) |
| 2003 | { |
| 2004 | siTypeAdd("hostname", siHostnameAddrMatch, siHostnameCheckAddr, NULL); |
| 2005 | #if defined(IPv6) && defined(AF_INET6) |
| 2006 | siTypeAdd("ipv6", siIPv6AddrMatch, siIPv6CheckAddr, NULL); |
| 2007 | #endif |
| 2008 | #if !defined(NO_LOCAL_CLIENT_CRED) |
| 2009 | siTypeAdd("localuser", siLocalCredAddrMatch, siLocalCredCheckAddr, |
| 2010 | &siLocalUserPriv); |
| 2011 | siTypeAdd("localgroup", siLocalCredAddrMatch, siLocalCredCheckAddr, |
| 2012 | &siLocalGroupPriv); |
| 2013 | #endif |
| 2014 | } |