| 1 | /* |
| 2 | * Copyright 1989 Network Computing Devices, Inc., Mountain View, California. |
| 3 | * |
| 4 | * Permission to use, copy, modify, and distribute this software and its |
| 5 | * documentation for any purpose and without fee is hereby granted, provided |
| 6 | * that the above copyright notice appear in all copies and that both that |
| 7 | * copyright notice and this permission notice appear in supporting |
| 8 | * documentation, and that the name of N.C.D. not be used in advertising or |
| 9 | * publicity pertaining to distribution of the software without specific, |
| 10 | * written prior permission. N.C.D. makes no representations about the |
| 11 | * suitability of this software for any purpose. It is provided "as is" |
| 12 | * without express or implied warranty. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #ifdef HAVE_DIX_CONFIG_H |
| 17 | #include <dix-config.h> |
| 18 | #endif |
| 19 | |
| 20 | #ifdef WIN32 |
| 21 | #include <X11/Xwinsock.h> |
| 22 | #endif |
| 23 | |
| 24 | #include <X11/Xos.h> |
| 25 | |
| 26 | #if !defined(WIN32) |
| 27 | #include <sys/param.h> |
| 28 | #include <sys/socket.h> |
| 29 | #include <netinet/in.h> |
| 30 | #include <netdb.h> |
| 31 | #endif |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <stdlib.h> |
| 35 | #include <X11/X.h> |
| 36 | #include <X11/Xmd.h> |
| 37 | #include "misc.h" |
| 38 | #include <X11/Xpoll.h> |
| 39 | #include "osdep.h" |
| 40 | #include "input.h" |
| 41 | #include "dixstruct.h" |
| 42 | #include "opaque.h" |
| 43 | #include "site.h" |
| 44 | |
| 45 | #ifdef STREAMSCONN |
| 46 | #include <tiuser.h> |
| 47 | #include <netconfig.h> |
| 48 | #include <netdir.h> |
| 49 | #endif |
| 50 | |
| 51 | #ifdef XDMCP |
| 52 | #undef REQUEST |
| 53 | |
| 54 | #ifdef XDMCP_NO_IPV6 |
| 55 | #undef IPv6 |
| 56 | #endif |
| 57 | |
| 58 | #include <X11/Xdmcp.h> |
| 59 | |
| 60 | #define X_INCLUDE_NETDB_H |
| 61 | #include <X11/Xos_r.h> |
| 62 | |
| 63 | static const char *defaultDisplayClass = COMPILEDDISPLAYCLASS; |
| 64 | |
| 65 | static int xdmcpSocket, sessionSocket; |
| 66 | static xdmcp_states state; |
| 67 | |
| 68 | #if defined(IPv6) && defined(AF_INET6) |
| 69 | static int xdmcpSocket6; |
| 70 | static struct sockaddr_storage req_sockaddr; |
| 71 | #else |
| 72 | static struct sockaddr_in req_sockaddr; |
| 73 | #endif |
| 74 | static int req_socklen; |
| 75 | static CARD32 SessionID; |
| 76 | static CARD32 timeOutTime; |
| 77 | static int timeOutRtx; |
| 78 | static CARD32 defaultKeepaliveDormancy = XDM_DEF_DORMANCY; |
| 79 | static CARD32 keepaliveDormancy = XDM_DEF_DORMANCY; |
| 80 | static CARD16 DisplayNumber; |
| 81 | static xdmcp_states XDM_INIT_STATE = XDM_OFF; |
| 82 | |
| 83 | #ifdef HASXDMAUTH |
| 84 | static char *xdmAuthCookie; |
| 85 | #endif |
| 86 | |
| 87 | static XdmcpBuffer buffer; |
| 88 | |
| 89 | #if defined(IPv6) && defined(AF_INET6) |
| 90 | |
| 91 | static struct addrinfo *mgrAddr; |
| 92 | static struct addrinfo *mgrAddrFirst; |
| 93 | |
| 94 | #define SOCKADDR_TYPE struct sockaddr_storage |
| 95 | #define SOCKADDR_FAMILY(s) ((struct sockaddr *)&(s))->sa_family |
| 96 | |
| 97 | #ifdef BSD44SOCKETS |
| 98 | #define SOCKLEN_FIELD(s) ((struct sockaddr *)&(s))->sa_len |
| 99 | #define SOCKLEN_TYPE unsigned char |
| 100 | #else |
| 101 | #define SOCKLEN_TYPE unsigned int |
| 102 | #endif |
| 103 | |
| 104 | #else |
| 105 | |
| 106 | #define SOCKADDR_TYPE struct sockaddr_in |
| 107 | #define SOCKADDR_FAMILY(s) (s).sin_family |
| 108 | |
| 109 | #ifdef BSD44SOCKETS |
| 110 | #define SOCKLEN_FIELD(s) (s).sin_len |
| 111 | #define SOCKLEN_TYPE unsigned char |
| 112 | #else |
| 113 | #define SOCKLEN_TYPE size_t |
| 114 | #endif |
| 115 | |
| 116 | #endif |
| 117 | |
| 118 | static SOCKADDR_TYPE ManagerAddress; |
| 119 | static SOCKADDR_TYPE FromAddress; |
| 120 | |
| 121 | #ifdef SOCKLEN_FIELD |
| 122 | #define ManagerAddressLen SOCKLEN_FIELD(ManagerAddress) |
| 123 | #define FromAddressLen SOCKLEN_FIELD(FromAddress) |
| 124 | #else |
| 125 | static SOCKLEN_TYPE ManagerAddressLen, FromAddressLen; |
| 126 | #endif |
| 127 | |
| 128 | #if defined(IPv6) && defined(AF_INET6) |
| 129 | static struct multicastinfo { |
| 130 | struct multicastinfo *next; |
| 131 | struct addrinfo *ai; |
| 132 | int hops; |
| 133 | } *mcastlist; |
| 134 | #endif |
| 135 | |
| 136 | static void XdmcpAddHost(const struct sockaddr *from, |
| 137 | int fromlen, |
| 138 | ARRAY8Ptr AuthenticationName, |
| 139 | ARRAY8Ptr hostname, ARRAY8Ptr status); |
| 140 | |
| 141 | static void XdmcpSelectHost(const struct sockaddr *host_sockaddr, |
| 142 | int host_len, ARRAY8Ptr AuthenticationName); |
| 143 | |
| 144 | static void get_xdmcp_sock(void); |
| 145 | |
| 146 | static void send_query_msg(void); |
| 147 | |
| 148 | static void recv_willing_msg(struct sockaddr * /*from */ , |
| 149 | int /*fromlen */ , |
| 150 | unsigned /*length */ ); |
| 151 | |
| 152 | static void send_request_msg(void); |
| 153 | |
| 154 | static void recv_accept_msg(unsigned /*length */ ); |
| 155 | |
| 156 | static void recv_decline_msg(unsigned /*length */ ); |
| 157 | |
| 158 | static void send_manage_msg(void); |
| 159 | |
| 160 | static void recv_refuse_msg(unsigned /*length */ ); |
| 161 | |
| 162 | static void recv_failed_msg(unsigned /*length */ ); |
| 163 | |
| 164 | static void send_keepalive_msg(void); |
| 165 | |
| 166 | static void recv_alive_msg(unsigned /*length */ ); |
| 167 | |
| 168 | static void XdmcpFatal(const char * /*type */ , |
| 169 | ARRAY8Ptr /*status */ ); |
| 170 | |
| 171 | static void XdmcpWarning(const char * /*str */ ); |
| 172 | |
| 173 | static void get_manager_by_name(int /*argc */ , |
| 174 | char ** /*argv */ , |
| 175 | int /*i */ ); |
| 176 | |
| 177 | static void get_fromaddr_by_name(int /*argc */ , char ** /*argv */ , |
| 178 | int /*i */ ); |
| 179 | |
| 180 | #if defined(IPv6) && defined(AF_INET6) |
| 181 | static int get_mcast_options(int /*argc */ , char ** /*argv */ , int /*i */ ); |
| 182 | #endif |
| 183 | |
| 184 | static void receive_packet(int /*socketfd */ ); |
| 185 | |
| 186 | static void send_packet(void); |
| 187 | |
| 188 | static void timeout(void); |
| 189 | |
| 190 | static void restart(void); |
| 191 | |
| 192 | static void XdmcpBlockHandler(pointer /*data */ , |
| 193 | struct timeval ** /*wt */ , |
| 194 | pointer /*LastSelectMask */ ); |
| 195 | |
| 196 | static void XdmcpWakeupHandler(pointer /*data */ , |
| 197 | int /*i */ , |
| 198 | pointer /*LastSelectMask */ ); |
| 199 | |
| 200 | /* |
| 201 | * Register the Manufacturer display ID |
| 202 | */ |
| 203 | |
| 204 | static ARRAY8 ManufacturerDisplayID; |
| 205 | |
| 206 | static void |
| 207 | XdmcpRegisterManufacturerDisplayID(const char *name, int length) |
| 208 | { |
| 209 | int i; |
| 210 | |
| 211 | XdmcpDisposeARRAY8(&ManufacturerDisplayID); |
| 212 | if (!XdmcpAllocARRAY8(&ManufacturerDisplayID, length)) |
| 213 | return; |
| 214 | for (i = 0; i < length; i++) |
| 215 | ManufacturerDisplayID.data[i] = (CARD8) name[i]; |
| 216 | } |
| 217 | |
| 218 | static unsigned short xdm_udp_port = XDM_UDP_PORT; |
| 219 | static Bool OneSession = FALSE; |
| 220 | static const char *xdm_from = NULL; |
| 221 | |
| 222 | void |
| 223 | XdmcpUseMsg(void) |
| 224 | { |
| 225 | ErrorF("-query host-name contact named host for XDMCP\n"); |
| 226 | ErrorF("-broadcast broadcast for XDMCP\n"); |
| 227 | #if defined(IPv6) && defined(AF_INET6) |
| 228 | ErrorF("-multicast [addr [hops]] IPv6 multicast for XDMCP\n"); |
| 229 | #endif |
| 230 | ErrorF("-indirect host-name contact named host for indirect XDMCP\n"); |
| 231 | ErrorF("-port port-num UDP port number to send messages to\n"); |
| 232 | ErrorF |
| 233 | ("-from local-address specify the local address to connect from\n"); |
| 234 | ErrorF("-once Terminate server after one session\n"); |
| 235 | ErrorF("-class display-class specify display class to send in manage\n"); |
| 236 | #ifdef HASXDMAUTH |
| 237 | ErrorF("-cookie xdm-auth-bits specify the magic cookie for XDMCP\n"); |
| 238 | #endif |
| 239 | ErrorF("-displayID display-id manufacturer display ID for request\n"); |
| 240 | } |
| 241 | |
| 242 | int |
| 243 | XdmcpOptions(int argc, char **argv, int i) |
| 244 | { |
| 245 | if (strcmp(argv[i], "-query") == 0) { |
| 246 | get_manager_by_name(argc, argv, i++); |
| 247 | XDM_INIT_STATE = XDM_QUERY; |
| 248 | AccessUsingXdmcp(); |
| 249 | return i + 1; |
| 250 | } |
| 251 | if (strcmp(argv[i], "-broadcast") == 0) { |
| 252 | XDM_INIT_STATE = XDM_BROADCAST; |
| 253 | AccessUsingXdmcp(); |
| 254 | return i + 1; |
| 255 | } |
| 256 | #if defined(IPv6) && defined(AF_INET6) |
| 257 | if (strcmp(argv[i], "-multicast") == 0) { |
| 258 | i = get_mcast_options(argc, argv, ++i); |
| 259 | XDM_INIT_STATE = XDM_MULTICAST; |
| 260 | AccessUsingXdmcp(); |
| 261 | return i + 1; |
| 262 | } |
| 263 | #endif |
| 264 | if (strcmp(argv[i], "-indirect") == 0) { |
| 265 | get_manager_by_name(argc, argv, i++); |
| 266 | XDM_INIT_STATE = XDM_INDIRECT; |
| 267 | AccessUsingXdmcp(); |
| 268 | return i + 1; |
| 269 | } |
| 270 | if (strcmp(argv[i], "-port") == 0) { |
| 271 | if (++i == argc) { |
| 272 | FatalError("Xserver: missing port number in command line\n"); |
| 273 | } |
| 274 | xdm_udp_port = (unsigned short) atoi(argv[i]); |
| 275 | return i + 1; |
| 276 | } |
| 277 | if (strcmp(argv[i], "-from") == 0) { |
| 278 | get_fromaddr_by_name(argc, argv, ++i); |
| 279 | return i + 1; |
| 280 | } |
| 281 | if (strcmp(argv[i], "-once") == 0) { |
| 282 | OneSession = TRUE; |
| 283 | return i + 1; |
| 284 | } |
| 285 | if (strcmp(argv[i], "-class") == 0) { |
| 286 | if (++i == argc) { |
| 287 | FatalError("Xserver: missing class name in command line\n"); |
| 288 | } |
| 289 | defaultDisplayClass = argv[i]; |
| 290 | return i + 1; |
| 291 | } |
| 292 | #ifdef HASXDMAUTH |
| 293 | if (strcmp(argv[i], "-cookie") == 0) { |
| 294 | if (++i == argc) { |
| 295 | FatalError("Xserver: missing cookie data in command line\n"); |
| 296 | } |
| 297 | xdmAuthCookie = argv[i]; |
| 298 | return i + 1; |
| 299 | } |
| 300 | #endif |
| 301 | if (strcmp(argv[i], "-displayID") == 0) { |
| 302 | if (++i == argc) { |
| 303 | FatalError("Xserver: missing displayID in command line\n"); |
| 304 | } |
| 305 | XdmcpRegisterManufacturerDisplayID(argv[i], strlen(argv[i])); |
| 306 | return i + 1; |
| 307 | } |
| 308 | return i; |
| 309 | } |
| 310 | |
| 311 | /* |
| 312 | * This section is a collection of routines for |
| 313 | * registering server-specific data with the XDMCP |
| 314 | * state machine. |
| 315 | */ |
| 316 | |
| 317 | /* |
| 318 | * Save all broadcast addresses away so BroadcastQuery |
| 319 | * packets get sent everywhere |
| 320 | */ |
| 321 | |
| 322 | #define MAX_BROADCAST 10 |
| 323 | |
| 324 | /* This stays sockaddr_in since IPv6 doesn't support broadcast */ |
| 325 | static struct sockaddr_in BroadcastAddresses[MAX_BROADCAST]; |
| 326 | static int NumBroadcastAddresses; |
| 327 | |
| 328 | void |
| 329 | XdmcpRegisterBroadcastAddress(const struct sockaddr_in *addr) |
| 330 | { |
| 331 | struct sockaddr_in *bcast; |
| 332 | |
| 333 | if (NumBroadcastAddresses >= MAX_BROADCAST) |
| 334 | return; |
| 335 | bcast = &BroadcastAddresses[NumBroadcastAddresses++]; |
| 336 | memset(bcast, 0, sizeof(struct sockaddr_in)); |
| 337 | #ifdef BSD44SOCKETS |
| 338 | bcast->sin_len = addr->sin_len; |
| 339 | #endif |
| 340 | bcast->sin_family = addr->sin_family; |
| 341 | bcast->sin_port = htons(xdm_udp_port); |
| 342 | bcast->sin_addr = addr->sin_addr; |
| 343 | } |
| 344 | |
| 345 | /* |
| 346 | * Each authentication type is registered here; Validator |
| 347 | * will be called to check all access attempts using |
| 348 | * the specified authentication type |
| 349 | */ |
| 350 | |
| 351 | static ARRAYofARRAY8 AuthenticationNames, AuthenticationDatas; |
| 352 | typedef struct _AuthenticationFuncs { |
| 353 | ValidatorFunc Validator; |
| 354 | GeneratorFunc Generator; |
| 355 | AddAuthorFunc AddAuth; |
| 356 | } AuthenticationFuncsRec, *AuthenticationFuncsPtr; |
| 357 | |
| 358 | static AuthenticationFuncsPtr AuthenticationFuncsList; |
| 359 | |
| 360 | void |
| 361 | XdmcpRegisterAuthentication(const char *name, |
| 362 | int namelen, |
| 363 | const char *data, |
| 364 | int datalen, |
| 365 | ValidatorFunc Validator, |
| 366 | GeneratorFunc Generator, AddAuthorFunc AddAuth) |
| 367 | { |
| 368 | int i; |
| 369 | ARRAY8 AuthenticationName, AuthenticationData; |
| 370 | static AuthenticationFuncsPtr newFuncs; |
| 371 | |
| 372 | if (!XdmcpAllocARRAY8(&AuthenticationName, namelen)) |
| 373 | return; |
| 374 | if (!XdmcpAllocARRAY8(&AuthenticationData, datalen)) { |
| 375 | XdmcpDisposeARRAY8(&AuthenticationName); |
| 376 | return; |
| 377 | } |
| 378 | for (i = 0; i < namelen; i++) |
| 379 | AuthenticationName.data[i] = name[i]; |
| 380 | for (i = 0; i < datalen; i++) |
| 381 | AuthenticationData.data[i] = data[i]; |
| 382 | if (!(XdmcpReallocARRAYofARRAY8(&AuthenticationNames, |
| 383 | AuthenticationNames.length + 1) && |
| 384 | XdmcpReallocARRAYofARRAY8(&AuthenticationDatas, |
| 385 | AuthenticationDatas.length + 1) && |
| 386 | (newFuncs = |
| 387 | malloc((AuthenticationNames.length + |
| 388 | 1) * sizeof(AuthenticationFuncsRec))))) { |
| 389 | XdmcpDisposeARRAY8(&AuthenticationName); |
| 390 | XdmcpDisposeARRAY8(&AuthenticationData); |
| 391 | return; |
| 392 | } |
| 393 | for (i = 0; i < AuthenticationNames.length - 1; i++) |
| 394 | newFuncs[i] = AuthenticationFuncsList[i]; |
| 395 | newFuncs[AuthenticationNames.length - 1].Validator = Validator; |
| 396 | newFuncs[AuthenticationNames.length - 1].Generator = Generator; |
| 397 | newFuncs[AuthenticationNames.length - 1].AddAuth = AddAuth; |
| 398 | free(AuthenticationFuncsList); |
| 399 | AuthenticationFuncsList = newFuncs; |
| 400 | AuthenticationNames.data[AuthenticationNames.length - 1] = |
| 401 | AuthenticationName; |
| 402 | AuthenticationDatas.data[AuthenticationDatas.length - 1] = |
| 403 | AuthenticationData; |
| 404 | } |
| 405 | |
| 406 | /* |
| 407 | * Select the authentication type to be used; this is |
| 408 | * set by the manager of the host to be connected to. |
| 409 | */ |
| 410 | |
| 411 | static ARRAY8 noAuthenticationName = { (CARD16) 0, (CARD8Ptr) 0 }; |
| 412 | static ARRAY8 noAuthenticationData = { (CARD16) 0, (CARD8Ptr) 0 }; |
| 413 | |
| 414 | static ARRAY8Ptr AuthenticationName = &noAuthenticationName; |
| 415 | static ARRAY8Ptr AuthenticationData = &noAuthenticationData; |
| 416 | static AuthenticationFuncsPtr AuthenticationFuncs; |
| 417 | |
| 418 | static void |
| 419 | XdmcpSetAuthentication(const ARRAY8Ptr name) |
| 420 | { |
| 421 | int i; |
| 422 | |
| 423 | for (i = 0; i < AuthenticationNames.length; i++) |
| 424 | if (XdmcpARRAY8Equal(&AuthenticationNames.data[i], name)) { |
| 425 | AuthenticationName = &AuthenticationNames.data[i]; |
| 426 | AuthenticationData = &AuthenticationDatas.data[i]; |
| 427 | AuthenticationFuncs = &AuthenticationFuncsList[i]; |
| 428 | break; |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | /* |
| 433 | * Register the host address for the display |
| 434 | */ |
| 435 | |
| 436 | static ARRAY16 ConnectionTypes; |
| 437 | static ARRAYofARRAY8 ConnectionAddresses; |
| 438 | static long xdmcpGeneration; |
| 439 | |
| 440 | void |
| 441 | XdmcpRegisterConnection(int type, const char *address, int addrlen) |
| 442 | { |
| 443 | int i; |
| 444 | CARD8 *newAddress; |
| 445 | |
| 446 | if (xdmcpGeneration != serverGeneration) { |
| 447 | XdmcpDisposeARRAY16(&ConnectionTypes); |
| 448 | XdmcpDisposeARRAYofARRAY8(&ConnectionAddresses); |
| 449 | xdmcpGeneration = serverGeneration; |
| 450 | } |
| 451 | if (xdm_from != NULL) { /* Only register the requested address */ |
| 452 | const void *regAddr = address; |
| 453 | const void *fromAddr = NULL; |
| 454 | int regAddrlen = addrlen; |
| 455 | |
| 456 | if (addrlen == sizeof(struct in_addr)) { |
| 457 | if (SOCKADDR_FAMILY(FromAddress) == AF_INET) { |
| 458 | fromAddr = &((struct sockaddr_in *) &FromAddress)->sin_addr; |
| 459 | } |
| 460 | #if defined(IPv6) && defined(AF_INET6) |
| 461 | else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET6) && |
| 462 | IN6_IS_ADDR_V4MAPPED(& |
| 463 | ((struct sockaddr_in6 *) |
| 464 | &FromAddress)->sin6_addr)) { |
| 465 | fromAddr = |
| 466 | &((struct sockaddr_in6 *) &FromAddress)->sin6_addr. |
| 467 | s6_addr[12]; |
| 468 | } |
| 469 | #endif |
| 470 | } |
| 471 | #if defined(IPv6) && defined(AF_INET6) |
| 472 | else if (addrlen == sizeof(struct in6_addr)) { |
| 473 | if (SOCKADDR_FAMILY(FromAddress) == AF_INET6) { |
| 474 | fromAddr = &((struct sockaddr_in6 *) &FromAddress)->sin6_addr; |
| 475 | } |
| 476 | else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET) && |
| 477 | IN6_IS_ADDR_V4MAPPED((const struct in6_addr *) address)) { |
| 478 | fromAddr = &((struct sockaddr_in *) &FromAddress)->sin_addr; |
| 479 | regAddr = |
| 480 | &((struct sockaddr_in6 *) &address)->sin6_addr.s6_addr[12]; |
| 481 | regAddrlen = sizeof(struct in_addr); |
| 482 | } |
| 483 | } |
| 484 | #endif |
| 485 | if (!fromAddr || memcmp(regAddr, fromAddr, regAddrlen) != 0) { |
| 486 | return; |
| 487 | } |
| 488 | } |
| 489 | if (ConnectionAddresses.length + 1 == 256) |
| 490 | return; |
| 491 | newAddress = malloc(addrlen * sizeof(CARD8)); |
| 492 | if (!newAddress) |
| 493 | return; |
| 494 | if (!XdmcpReallocARRAY16(&ConnectionTypes, ConnectionTypes.length + 1)) { |
| 495 | free(newAddress); |
| 496 | return; |
| 497 | } |
| 498 | if (!XdmcpReallocARRAYofARRAY8(&ConnectionAddresses, |
| 499 | ConnectionAddresses.length + 1)) { |
| 500 | free(newAddress); |
| 501 | return; |
| 502 | } |
| 503 | ConnectionTypes.data[ConnectionTypes.length - 1] = (CARD16) type; |
| 504 | for (i = 0; i < addrlen; i++) |
| 505 | newAddress[i] = address[i]; |
| 506 | ConnectionAddresses.data[ConnectionAddresses.length - 1].data = newAddress; |
| 507 | ConnectionAddresses.data[ConnectionAddresses.length - 1].length = addrlen; |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * Register an Authorization Name. XDMCP advertises this list |
| 512 | * to the manager. |
| 513 | */ |
| 514 | |
| 515 | static ARRAYofARRAY8 AuthorizationNames; |
| 516 | |
| 517 | void |
| 518 | XdmcpRegisterAuthorizations(void) |
| 519 | { |
| 520 | XdmcpDisposeARRAYofARRAY8(&AuthorizationNames); |
| 521 | RegisterAuthorizations(); |
| 522 | } |
| 523 | |
| 524 | void |
| 525 | XdmcpRegisterAuthorization(const char *name, int namelen) |
| 526 | { |
| 527 | ARRAY8 authName; |
| 528 | int i; |
| 529 | |
| 530 | authName.data = malloc(namelen * sizeof(CARD8)); |
| 531 | if (!authName.data) |
| 532 | return; |
| 533 | if (!XdmcpReallocARRAYofARRAY8 |
| 534 | (&AuthorizationNames, AuthorizationNames.length + 1)) { |
| 535 | free(authName.data); |
| 536 | return; |
| 537 | } |
| 538 | for (i = 0; i < namelen; i++) |
| 539 | authName.data[i] = (CARD8) name[i]; |
| 540 | authName.length = namelen; |
| 541 | AuthorizationNames.data[AuthorizationNames.length - 1] = authName; |
| 542 | } |
| 543 | |
| 544 | /* |
| 545 | * Register the DisplayClass string |
| 546 | */ |
| 547 | |
| 548 | static ARRAY8 DisplayClass; |
| 549 | |
| 550 | static void |
| 551 | XdmcpRegisterDisplayClass(const char *name, int length) |
| 552 | { |
| 553 | int i; |
| 554 | |
| 555 | XdmcpDisposeARRAY8(&DisplayClass); |
| 556 | if (!XdmcpAllocARRAY8(&DisplayClass, length)) |
| 557 | return; |
| 558 | for (i = 0; i < length; i++) |
| 559 | DisplayClass.data[i] = (CARD8) name[i]; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * initialize XDMCP; create the socket, compute the display |
| 564 | * number, set up the state machine |
| 565 | */ |
| 566 | |
| 567 | void |
| 568 | XdmcpInit(void) |
| 569 | { |
| 570 | state = XDM_INIT_STATE; |
| 571 | #ifdef HASXDMAUTH |
| 572 | if (xdmAuthCookie) |
| 573 | XdmAuthenticationInit(xdmAuthCookie, strlen(xdmAuthCookie)); |
| 574 | #endif |
| 575 | if (state != XDM_OFF) { |
| 576 | XdmcpRegisterAuthorizations(); |
| 577 | XdmcpRegisterDisplayClass(defaultDisplayClass, |
| 578 | strlen(defaultDisplayClass)); |
| 579 | AccessUsingXdmcp(); |
| 580 | RegisterBlockAndWakeupHandlers(XdmcpBlockHandler, XdmcpWakeupHandler, |
| 581 | (pointer) 0); |
| 582 | timeOutRtx = 0; |
| 583 | DisplayNumber = (CARD16) atoi(display); |
| 584 | get_xdmcp_sock(); |
| 585 | send_packet(); |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | void |
| 590 | XdmcpReset(void) |
| 591 | { |
| 592 | state = XDM_INIT_STATE; |
| 593 | if (state != XDM_OFF) { |
| 594 | RegisterBlockAndWakeupHandlers(XdmcpBlockHandler, XdmcpWakeupHandler, |
| 595 | (pointer) 0); |
| 596 | timeOutRtx = 0; |
| 597 | send_packet(); |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /* |
| 602 | * Called whenever a new connection is created; notices the |
| 603 | * first connection and saves it to terminate the session |
| 604 | * when it is closed |
| 605 | */ |
| 606 | |
| 607 | void |
| 608 | XdmcpOpenDisplay(int sock) |
| 609 | { |
| 610 | if (state != XDM_AWAIT_MANAGE_RESPONSE) |
| 611 | return; |
| 612 | state = XDM_RUN_SESSION; |
| 613 | sessionSocket = sock; |
| 614 | } |
| 615 | |
| 616 | void |
| 617 | XdmcpCloseDisplay(int sock) |
| 618 | { |
| 619 | if ((state != XDM_RUN_SESSION && state != XDM_AWAIT_ALIVE_RESPONSE) |
| 620 | || sessionSocket != sock) |
| 621 | return; |
| 622 | state = XDM_INIT_STATE; |
| 623 | if (OneSession) |
| 624 | dispatchException |= DE_TERMINATE; |
| 625 | else |
| 626 | dispatchException |= DE_RESET; |
| 627 | isItTimeToYield = TRUE; |
| 628 | } |
| 629 | |
| 630 | /* |
| 631 | * called before going to sleep, this routine |
| 632 | * may modify the timeout value about to be sent |
| 633 | * to select; in this way XDMCP can do appropriate things |
| 634 | * dynamically while starting up |
| 635 | */ |
| 636 | |
| 637 | /*ARGSUSED*/ static void |
| 638 | XdmcpBlockHandler(pointer data, /* unused */ |
| 639 | struct timeval **wt, pointer pReadmask) |
| 640 | { |
| 641 | fd_set *LastSelectMask = (fd_set *) pReadmask; |
| 642 | CARD32 millisToGo; |
| 643 | |
| 644 | if (state == XDM_OFF) |
| 645 | return; |
| 646 | FD_SET(xdmcpSocket, LastSelectMask); |
| 647 | #if defined(IPv6) && defined(AF_INET6) |
| 648 | if (xdmcpSocket6 >= 0) |
| 649 | FD_SET(xdmcpSocket6, LastSelectMask); |
| 650 | #endif |
| 651 | if (timeOutTime == 0) |
| 652 | return; |
| 653 | millisToGo = timeOutTime - GetTimeInMillis(); |
| 654 | if ((int) millisToGo < 0) |
| 655 | millisToGo = 0; |
| 656 | AdjustWaitForDelay(wt, millisToGo); |
| 657 | } |
| 658 | |
| 659 | /* |
| 660 | * called after select returns; this routine will |
| 661 | * recognise when XDMCP packets await and |
| 662 | * process them appropriately |
| 663 | */ |
| 664 | |
| 665 | /*ARGSUSED*/ static void |
| 666 | XdmcpWakeupHandler(pointer data, /* unused */ |
| 667 | int i, pointer pReadmask) |
| 668 | { |
| 669 | fd_set *LastSelectMask = (fd_set *) pReadmask; |
| 670 | fd_set devicesReadable; |
| 671 | |
| 672 | if (state == XDM_OFF) |
| 673 | return; |
| 674 | if (i > 0) { |
| 675 | if (FD_ISSET(xdmcpSocket, LastSelectMask)) { |
| 676 | receive_packet(xdmcpSocket); |
| 677 | FD_CLR(xdmcpSocket, LastSelectMask); |
| 678 | } |
| 679 | #if defined(IPv6) && defined(AF_INET6) |
| 680 | if (xdmcpSocket6 >= 0 && FD_ISSET(xdmcpSocket6, LastSelectMask)) { |
| 681 | receive_packet(xdmcpSocket6); |
| 682 | FD_CLR(xdmcpSocket6, LastSelectMask); |
| 683 | } |
| 684 | #endif |
| 685 | XFD_ANDSET(&devicesReadable, LastSelectMask, &EnabledDevices); |
| 686 | if (XFD_ANYSET(&devicesReadable)) { |
| 687 | if (state == XDM_AWAIT_USER_INPUT) |
| 688 | restart(); |
| 689 | else if (state == XDM_RUN_SESSION) |
| 690 | keepaliveDormancy = defaultKeepaliveDormancy; |
| 691 | } |
| 692 | if (XFD_ANYSET(&AllClients) && state == XDM_RUN_SESSION) |
| 693 | timeOutTime = GetTimeInMillis() + keepaliveDormancy * 1000; |
| 694 | } |
| 695 | else if (timeOutTime && (int) (GetTimeInMillis() - timeOutTime) >= 0) { |
| 696 | if (state == XDM_RUN_SESSION) { |
| 697 | state = XDM_KEEPALIVE; |
| 698 | send_packet(); |
| 699 | } |
| 700 | else |
| 701 | timeout(); |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | /* |
| 706 | * This routine should be called from the routine that drives the |
| 707 | * user's host menu when the user selects a host |
| 708 | */ |
| 709 | |
| 710 | static void |
| 711 | XdmcpSelectHost(const struct sockaddr *host_sockaddr, |
| 712 | int host_len, ARRAY8Ptr AuthenticationName) |
| 713 | { |
| 714 | state = XDM_START_CONNECTION; |
| 715 | memmove(&req_sockaddr, host_sockaddr, host_len); |
| 716 | req_socklen = host_len; |
| 717 | XdmcpSetAuthentication(AuthenticationName); |
| 718 | send_packet(); |
| 719 | } |
| 720 | |
| 721 | /* |
| 722 | * !!! this routine should be replaced by a routine that adds |
| 723 | * the host to the user's host menu. the current version just |
| 724 | * selects the first host to respond with willing message. |
| 725 | */ |
| 726 | |
| 727 | /*ARGSUSED*/ static void |
| 728 | XdmcpAddHost(const struct sockaddr *from, |
| 729 | int fromlen, |
| 730 | ARRAY8Ptr AuthenticationName, ARRAY8Ptr hostname, ARRAY8Ptr status) |
| 731 | { |
| 732 | XdmcpSelectHost(from, fromlen, AuthenticationName); |
| 733 | } |
| 734 | |
| 735 | /* |
| 736 | * A message is queued on the socket; read it and |
| 737 | * do the appropriate thing |
| 738 | */ |
| 739 | |
| 740 | static ARRAY8 UnwillingMessage = { (CARD8) 14, (CARD8 *) "Host unwilling" }; |
| 741 | |
| 742 | static void |
| 743 | receive_packet(int socketfd) |
| 744 | { |
| 745 | #if defined(IPv6) && defined(AF_INET6) |
| 746 | struct sockaddr_storage from; |
| 747 | #else |
| 748 | struct sockaddr_in from; |
| 749 | #endif |
| 750 | int fromlen = sizeof(from); |
| 751 | XdmcpHeader header; |
| 752 | |
| 753 | /* read message off socket */ |
| 754 | if (!XdmcpFill(socketfd, &buffer, (XdmcpNetaddr) &from, &fromlen)) |
| 755 | return; |
| 756 | |
| 757 | /* reset retransmission backoff */ |
| 758 | timeOutRtx = 0; |
| 759 | |
| 760 | if (!XdmcpReadHeader(&buffer, &header)) |
| 761 | return; |
| 762 | |
| 763 | if (header.version != XDM_PROTOCOL_VERSION) |
| 764 | return; |
| 765 | |
| 766 | switch (header.opcode) { |
| 767 | case WILLING: |
| 768 | recv_willing_msg((struct sockaddr *) &from, fromlen, header.length); |
| 769 | break; |
| 770 | case UNWILLING: |
| 771 | XdmcpFatal("Manager unwilling", &UnwillingMessage); |
| 772 | break; |
| 773 | case ACCEPT: |
| 774 | recv_accept_msg(header.length); |
| 775 | break; |
| 776 | case DECLINE: |
| 777 | recv_decline_msg(header.length); |
| 778 | break; |
| 779 | case REFUSE: |
| 780 | recv_refuse_msg(header.length); |
| 781 | break; |
| 782 | case FAILED: |
| 783 | recv_failed_msg(header.length); |
| 784 | break; |
| 785 | case ALIVE: |
| 786 | recv_alive_msg(header.length); |
| 787 | break; |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | /* |
| 792 | * send the appropriate message given the current state |
| 793 | */ |
| 794 | |
| 795 | static void |
| 796 | send_packet(void) |
| 797 | { |
| 798 | int rtx; |
| 799 | |
| 800 | switch (state) { |
| 801 | case XDM_QUERY: |
| 802 | case XDM_BROADCAST: |
| 803 | case XDM_INDIRECT: |
| 804 | #if defined(IPv6) && defined(AF_INET6) |
| 805 | case XDM_MULTICAST: |
| 806 | #endif |
| 807 | send_query_msg(); |
| 808 | break; |
| 809 | case XDM_START_CONNECTION: |
| 810 | send_request_msg(); |
| 811 | break; |
| 812 | case XDM_MANAGE: |
| 813 | send_manage_msg(); |
| 814 | break; |
| 815 | case XDM_KEEPALIVE: |
| 816 | send_keepalive_msg(); |
| 817 | break; |
| 818 | default: |
| 819 | break; |
| 820 | } |
| 821 | rtx = (XDM_MIN_RTX << timeOutRtx); |
| 822 | if (rtx > XDM_MAX_RTX) |
| 823 | rtx = XDM_MAX_RTX; |
| 824 | timeOutTime = GetTimeInMillis() + rtx * 1000; |
| 825 | } |
| 826 | |
| 827 | /* |
| 828 | * The session is declared dead for some reason; too many |
| 829 | * timeouts, or Keepalive failure. |
| 830 | */ |
| 831 | |
| 832 | static void |
| 833 | XdmcpDeadSession(const char *reason) |
| 834 | { |
| 835 | ErrorF("XDM: %s, declaring session dead\n", reason); |
| 836 | state = XDM_INIT_STATE; |
| 837 | isItTimeToYield = TRUE; |
| 838 | dispatchException |= DE_RESET; |
| 839 | timeOutTime = 0; |
| 840 | timeOutRtx = 0; |
| 841 | send_packet(); |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | * Timeout waiting for an XDMCP response. |
| 846 | */ |
| 847 | |
| 848 | static void |
| 849 | timeout(void) |
| 850 | { |
| 851 | timeOutRtx++; |
| 852 | if (state == XDM_AWAIT_ALIVE_RESPONSE && timeOutRtx >= XDM_KA_RTX_LIMIT) { |
| 853 | XdmcpDeadSession("too many keepalive retransmissions"); |
| 854 | return; |
| 855 | } |
| 856 | else if (timeOutRtx >= XDM_RTX_LIMIT) { |
| 857 | /* Quit if "-once" specified, otherwise reset and try again. */ |
| 858 | if (OneSession) { |
| 859 | dispatchException |= DE_TERMINATE; |
| 860 | ErrorF("XDM: too many retransmissions\n"); |
| 861 | } |
| 862 | else { |
| 863 | XdmcpDeadSession("too many retransmissions"); |
| 864 | } |
| 865 | return; |
| 866 | } |
| 867 | |
| 868 | #if defined(IPv6) && defined(AF_INET6) |
| 869 | if (state == XDM_COLLECT_QUERY || state == XDM_COLLECT_INDIRECT_QUERY) { |
| 870 | /* Try next address */ |
| 871 | for (mgrAddr = mgrAddr->ai_next;; mgrAddr = mgrAddr->ai_next) { |
| 872 | if (mgrAddr == NULL) { |
| 873 | mgrAddr = mgrAddrFirst; |
| 874 | } |
| 875 | if (mgrAddr->ai_family == AF_INET || mgrAddr->ai_family == AF_INET6) |
| 876 | break; |
| 877 | } |
| 878 | #ifndef SIN6_LEN |
| 879 | ManagerAddressLen = mgrAddr->ai_addrlen; |
| 880 | #endif |
| 881 | memcpy(&ManagerAddress, mgrAddr->ai_addr, mgrAddr->ai_addrlen); |
| 882 | } |
| 883 | #endif |
| 884 | |
| 885 | switch (state) { |
| 886 | case XDM_COLLECT_QUERY: |
| 887 | state = XDM_QUERY; |
| 888 | break; |
| 889 | case XDM_COLLECT_BROADCAST_QUERY: |
| 890 | state = XDM_BROADCAST; |
| 891 | break; |
| 892 | #if defined(IPv6) && defined(AF_INET6) |
| 893 | case XDM_COLLECT_MULTICAST_QUERY: |
| 894 | state = XDM_MULTICAST; |
| 895 | break; |
| 896 | #endif |
| 897 | case XDM_COLLECT_INDIRECT_QUERY: |
| 898 | state = XDM_INDIRECT; |
| 899 | break; |
| 900 | case XDM_AWAIT_REQUEST_RESPONSE: |
| 901 | state = XDM_START_CONNECTION; |
| 902 | break; |
| 903 | case XDM_AWAIT_MANAGE_RESPONSE: |
| 904 | state = XDM_MANAGE; |
| 905 | break; |
| 906 | case XDM_AWAIT_ALIVE_RESPONSE: |
| 907 | state = XDM_KEEPALIVE; |
| 908 | break; |
| 909 | default: |
| 910 | break; |
| 911 | } |
| 912 | send_packet(); |
| 913 | } |
| 914 | |
| 915 | static void |
| 916 | restart(void) |
| 917 | { |
| 918 | state = XDM_INIT_STATE; |
| 919 | timeOutRtx = 0; |
| 920 | send_packet(); |
| 921 | } |
| 922 | |
| 923 | static int |
| 924 | XdmcpCheckAuthentication(ARRAY8Ptr Name, ARRAY8Ptr Data, int packet_type) |
| 925 | { |
| 926 | return (XdmcpARRAY8Equal(Name, AuthenticationName) && |
| 927 | (AuthenticationName->length == 0 || |
| 928 | (*AuthenticationFuncs->Validator) (AuthenticationData, Data, |
| 929 | packet_type))); |
| 930 | } |
| 931 | |
| 932 | static int |
| 933 | XdmcpAddAuthorization(ARRAY8Ptr name, ARRAY8Ptr data) |
| 934 | { |
| 935 | AddAuthorFunc AddAuth; |
| 936 | |
| 937 | if (AuthenticationFuncs && AuthenticationFuncs->AddAuth) |
| 938 | AddAuth = AuthenticationFuncs->AddAuth; |
| 939 | else |
| 940 | AddAuth = AddAuthorization; |
| 941 | return (*AddAuth) ((unsigned short) name->length, |
| 942 | (char *) name->data, |
| 943 | (unsigned short) data->length, (char *) data->data); |
| 944 | } |
| 945 | |
| 946 | /* |
| 947 | * from here to the end of this file are routines private |
| 948 | * to the state machine. |
| 949 | */ |
| 950 | |
| 951 | static void |
| 952 | get_xdmcp_sock(void) |
| 953 | { |
| 954 | #ifdef STREAMSCONN |
| 955 | struct netconfig *nconf; |
| 956 | |
| 957 | if ((xdmcpSocket = t_open("/dev/udp", O_RDWR, 0)) < 0) { |
| 958 | XdmcpWarning("t_open() of /dev/udp failed"); |
| 959 | return; |
| 960 | } |
| 961 | |
| 962 | if (t_bind(xdmcpSocket, NULL, NULL) < 0) { |
| 963 | XdmcpWarning("UDP socket creation failed"); |
| 964 | t_error("t_bind(xdmcpSocket) failed"); |
| 965 | t_close(xdmcpSocket); |
| 966 | return; |
| 967 | } |
| 968 | |
| 969 | /* |
| 970 | * This part of the code looks contrived. It will actually fit in nicely |
| 971 | * when the CLTS part of Xtrans is implemented. |
| 972 | */ |
| 973 | |
| 974 | if ((nconf = getnetconfigent("udp")) == NULL) { |
| 975 | XdmcpWarning("UDP socket creation failed: getnetconfigent()"); |
| 976 | t_unbind(xdmcpSocket); |
| 977 | t_close(xdmcpSocket); |
| 978 | return; |
| 979 | } |
| 980 | |
| 981 | if (netdir_options(nconf, ND_SET_BROADCAST, xdmcpSocket, NULL)) { |
| 982 | XdmcpWarning("UDP set broadcast option failed: netdir_options()"); |
| 983 | freenetconfigent(nconf); |
| 984 | t_unbind(xdmcpSocket); |
| 985 | t_close(xdmcpSocket); |
| 986 | return; |
| 987 | } |
| 988 | |
| 989 | freenetconfigent(nconf); |
| 990 | #else |
| 991 | int soopts = 1; |
| 992 | |
| 993 | #if defined(IPv6) && defined(AF_INET6) |
| 994 | if ((xdmcpSocket6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) |
| 995 | XdmcpWarning("INET6 UDP socket creation failed"); |
| 996 | #endif |
| 997 | if ((xdmcpSocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) |
| 998 | XdmcpWarning("UDP socket creation failed"); |
| 999 | #ifdef SO_BROADCAST |
| 1000 | else if (setsockopt(xdmcpSocket, SOL_SOCKET, SO_BROADCAST, (char *) &soopts, |
| 1001 | sizeof(soopts)) < 0) |
| 1002 | XdmcpWarning("UDP set broadcast socket-option failed"); |
| 1003 | #endif /* SO_BROADCAST */ |
| 1004 | if (xdmcpSocket >= 0 && xdm_from != NULL) { |
| 1005 | if (bind(xdmcpSocket, (struct sockaddr *) &FromAddress, |
| 1006 | FromAddressLen) < 0) { |
| 1007 | FatalError("Xserver: failed to bind to -from address: %s\n", |
| 1008 | xdm_from); |
| 1009 | } |
| 1010 | } |
| 1011 | #endif /* STREAMSCONN */ |
| 1012 | } |
| 1013 | |
| 1014 | static void |
| 1015 | send_query_msg(void) |
| 1016 | { |
| 1017 | XdmcpHeader header; |
| 1018 | Bool broadcast = FALSE; |
| 1019 | |
| 1020 | #if defined(IPv6) && defined(AF_INET6) |
| 1021 | Bool multicast = FALSE; |
| 1022 | #endif |
| 1023 | int i; |
| 1024 | int socketfd = xdmcpSocket; |
| 1025 | |
| 1026 | header.version = XDM_PROTOCOL_VERSION; |
| 1027 | switch (state) { |
| 1028 | case XDM_QUERY: |
| 1029 | header.opcode = (CARD16) QUERY; |
| 1030 | state = XDM_COLLECT_QUERY; |
| 1031 | break; |
| 1032 | case XDM_BROADCAST: |
| 1033 | header.opcode = (CARD16) BROADCAST_QUERY; |
| 1034 | state = XDM_COLLECT_BROADCAST_QUERY; |
| 1035 | broadcast = TRUE; |
| 1036 | break; |
| 1037 | #if defined(IPv6) && defined(AF_INET6) |
| 1038 | case XDM_MULTICAST: |
| 1039 | header.opcode = (CARD16) BROADCAST_QUERY; |
| 1040 | state = XDM_COLLECT_MULTICAST_QUERY; |
| 1041 | multicast = TRUE; |
| 1042 | break; |
| 1043 | #endif |
| 1044 | case XDM_INDIRECT: |
| 1045 | header.opcode = (CARD16) INDIRECT_QUERY; |
| 1046 | state = XDM_COLLECT_INDIRECT_QUERY; |
| 1047 | break; |
| 1048 | default: |
| 1049 | break; |
| 1050 | } |
| 1051 | header.length = 1; |
| 1052 | for (i = 0; i < AuthenticationNames.length; i++) |
| 1053 | header.length += 2 + AuthenticationNames.data[i].length; |
| 1054 | |
| 1055 | XdmcpWriteHeader(&buffer, &header); |
| 1056 | XdmcpWriteARRAYofARRAY8(&buffer, &AuthenticationNames); |
| 1057 | if (broadcast) { |
| 1058 | int i; |
| 1059 | |
| 1060 | for (i = 0; i < NumBroadcastAddresses; i++) |
| 1061 | XdmcpFlush(xdmcpSocket, &buffer, |
| 1062 | (XdmcpNetaddr) &BroadcastAddresses[i], |
| 1063 | sizeof(struct sockaddr_in)); |
| 1064 | } |
| 1065 | #if defined(IPv6) && defined(AF_INET6) |
| 1066 | else if (multicast) { |
| 1067 | struct multicastinfo *mcl; |
| 1068 | struct addrinfo *ai; |
| 1069 | |
| 1070 | for (mcl = mcastlist; mcl != NULL; mcl = mcl->next) { |
| 1071 | for (ai = mcl->ai; ai != NULL; ai = ai->ai_next) { |
| 1072 | if (ai->ai_family == AF_INET) { |
| 1073 | unsigned char hopflag = (unsigned char) mcl->hops; |
| 1074 | |
| 1075 | socketfd = xdmcpSocket; |
| 1076 | setsockopt(socketfd, IPPROTO_IP, IP_MULTICAST_TTL, |
| 1077 | &hopflag, sizeof(hopflag)); |
| 1078 | } |
| 1079 | else if (ai->ai_family == AF_INET6) { |
| 1080 | int hopflag6 = mcl->hops; |
| 1081 | |
| 1082 | socketfd = xdmcpSocket6; |
| 1083 | setsockopt(socketfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, |
| 1084 | &hopflag6, sizeof(hopflag6)); |
| 1085 | } |
| 1086 | else { |
| 1087 | continue; |
| 1088 | } |
| 1089 | XdmcpFlush(socketfd, &buffer, |
| 1090 | (XdmcpNetaddr) ai->ai_addr, ai->ai_addrlen); |
| 1091 | break; |
| 1092 | } |
| 1093 | } |
| 1094 | } |
| 1095 | #endif |
| 1096 | else { |
| 1097 | #if defined(IPv6) && defined(AF_INET6) |
| 1098 | if (SOCKADDR_FAMILY(ManagerAddress) == AF_INET6) |
| 1099 | socketfd = xdmcpSocket6; |
| 1100 | #endif |
| 1101 | XdmcpFlush(socketfd, &buffer, (XdmcpNetaddr) &ManagerAddress, |
| 1102 | ManagerAddressLen); |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | static void |
| 1107 | recv_willing_msg(struct sockaddr *from, int fromlen, unsigned length) |
| 1108 | { |
| 1109 | ARRAY8 authenticationName; |
| 1110 | ARRAY8 hostname; |
| 1111 | ARRAY8 status; |
| 1112 | |
| 1113 | authenticationName.data = 0; |
| 1114 | hostname.data = 0; |
| 1115 | status.data = 0; |
| 1116 | if (XdmcpReadARRAY8(&buffer, &authenticationName) && |
| 1117 | XdmcpReadARRAY8(&buffer, &hostname) && |
| 1118 | XdmcpReadARRAY8(&buffer, &status)) { |
| 1119 | if (length == 6 + authenticationName.length + |
| 1120 | hostname.length + status.length) { |
| 1121 | switch (state) { |
| 1122 | case XDM_COLLECT_QUERY: |
| 1123 | XdmcpSelectHost(from, fromlen, &authenticationName); |
| 1124 | break; |
| 1125 | case XDM_COLLECT_BROADCAST_QUERY: |
| 1126 | #if defined(IPv6) && defined(AF_INET6) |
| 1127 | case XDM_COLLECT_MULTICAST_QUERY: |
| 1128 | #endif |
| 1129 | case XDM_COLLECT_INDIRECT_QUERY: |
| 1130 | XdmcpAddHost(from, fromlen, &authenticationName, &hostname, |
| 1131 | &status); |
| 1132 | break; |
| 1133 | default: |
| 1134 | break; |
| 1135 | } |
| 1136 | } |
| 1137 | } |
| 1138 | XdmcpDisposeARRAY8(&authenticationName); |
| 1139 | XdmcpDisposeARRAY8(&hostname); |
| 1140 | XdmcpDisposeARRAY8(&status); |
| 1141 | } |
| 1142 | |
| 1143 | static void |
| 1144 | send_request_msg(void) |
| 1145 | { |
| 1146 | XdmcpHeader header; |
| 1147 | int length; |
| 1148 | int i; |
| 1149 | CARD16 XdmcpConnectionType; |
| 1150 | ARRAY8 authenticationData; |
| 1151 | int socketfd = xdmcpSocket; |
| 1152 | |
| 1153 | switch (SOCKADDR_FAMILY(ManagerAddress)) { |
| 1154 | case AF_INET: |
| 1155 | XdmcpConnectionType = FamilyInternet; |
| 1156 | break; |
| 1157 | #if defined(IPv6) && defined(AF_INET6) |
| 1158 | case AF_INET6: |
| 1159 | XdmcpConnectionType = FamilyInternet6; |
| 1160 | break; |
| 1161 | #endif |
| 1162 | default: |
| 1163 | XdmcpConnectionType = 0xffff; |
| 1164 | break; |
| 1165 | } |
| 1166 | |
| 1167 | header.version = XDM_PROTOCOL_VERSION; |
| 1168 | header.opcode = (CARD16) REQUEST; |
| 1169 | |
| 1170 | length = 2; /* display number */ |
| 1171 | length += 1 + 2 * ConnectionTypes.length; /* connection types */ |
| 1172 | length += 1; /* connection addresses */ |
| 1173 | for (i = 0; i < ConnectionAddresses.length; i++) |
| 1174 | length += 2 + ConnectionAddresses.data[i].length; |
| 1175 | authenticationData.length = 0; |
| 1176 | authenticationData.data = 0; |
| 1177 | if (AuthenticationFuncs) { |
| 1178 | (*AuthenticationFuncs->Generator) (AuthenticationData, |
| 1179 | &authenticationData, REQUEST); |
| 1180 | } |
| 1181 | length += 2 + AuthenticationName->length; /* authentication name */ |
| 1182 | length += 2 + authenticationData.length; /* authentication data */ |
| 1183 | length += 1; /* authorization names */ |
| 1184 | for (i = 0; i < AuthorizationNames.length; i++) |
| 1185 | length += 2 + AuthorizationNames.data[i].length; |
| 1186 | length += 2 + ManufacturerDisplayID.length; /* display ID */ |
| 1187 | header.length = length; |
| 1188 | |
| 1189 | if (!XdmcpWriteHeader(&buffer, &header)) { |
| 1190 | XdmcpDisposeARRAY8(&authenticationData); |
| 1191 | return; |
| 1192 | } |
| 1193 | XdmcpWriteCARD16(&buffer, DisplayNumber); |
| 1194 | XdmcpWriteCARD8(&buffer, ConnectionTypes.length); |
| 1195 | |
| 1196 | /* The connection array is send reordered, so that connections of */ |
| 1197 | /* the same address type as the XDMCP manager connection are send */ |
| 1198 | /* first. This works around a bug in xdm. mario@klebsch.de */ |
| 1199 | for (i = 0; i < (int) ConnectionTypes.length; i++) |
| 1200 | if (ConnectionTypes.data[i] == XdmcpConnectionType) |
| 1201 | XdmcpWriteCARD16(&buffer, ConnectionTypes.data[i]); |
| 1202 | for (i = 0; i < (int) ConnectionTypes.length; i++) |
| 1203 | if (ConnectionTypes.data[i] != XdmcpConnectionType) |
| 1204 | XdmcpWriteCARD16(&buffer, ConnectionTypes.data[i]); |
| 1205 | |
| 1206 | XdmcpWriteCARD8(&buffer, ConnectionAddresses.length); |
| 1207 | for (i = 0; i < (int) ConnectionAddresses.length; i++) |
| 1208 | if ((i < ConnectionTypes.length) && |
| 1209 | (ConnectionTypes.data[i] == XdmcpConnectionType)) |
| 1210 | XdmcpWriteARRAY8(&buffer, &ConnectionAddresses.data[i]); |
| 1211 | for (i = 0; i < (int) ConnectionAddresses.length; i++) |
| 1212 | if ((i >= ConnectionTypes.length) || |
| 1213 | (ConnectionTypes.data[i] != XdmcpConnectionType)) |
| 1214 | XdmcpWriteARRAY8(&buffer, &ConnectionAddresses.data[i]); |
| 1215 | |
| 1216 | XdmcpWriteARRAY8(&buffer, AuthenticationName); |
| 1217 | XdmcpWriteARRAY8(&buffer, &authenticationData); |
| 1218 | XdmcpDisposeARRAY8(&authenticationData); |
| 1219 | XdmcpWriteARRAYofARRAY8(&buffer, &AuthorizationNames); |
| 1220 | XdmcpWriteARRAY8(&buffer, &ManufacturerDisplayID); |
| 1221 | #if defined(IPv6) && defined(AF_INET6) |
| 1222 | if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6) |
| 1223 | socketfd = xdmcpSocket6; |
| 1224 | #endif |
| 1225 | if (XdmcpFlush(socketfd, &buffer, |
| 1226 | (XdmcpNetaddr) &req_sockaddr, req_socklen)) |
| 1227 | state = XDM_AWAIT_REQUEST_RESPONSE; |
| 1228 | } |
| 1229 | |
| 1230 | static void |
| 1231 | recv_accept_msg(unsigned length) |
| 1232 | { |
| 1233 | CARD32 AcceptSessionID; |
| 1234 | ARRAY8 AcceptAuthenticationName, AcceptAuthenticationData; |
| 1235 | ARRAY8 AcceptAuthorizationName, AcceptAuthorizationData; |
| 1236 | |
| 1237 | if (state != XDM_AWAIT_REQUEST_RESPONSE) |
| 1238 | return; |
| 1239 | AcceptAuthenticationName.data = 0; |
| 1240 | AcceptAuthenticationData.data = 0; |
| 1241 | AcceptAuthorizationName.data = 0; |
| 1242 | AcceptAuthorizationData.data = 0; |
| 1243 | if (XdmcpReadCARD32(&buffer, &AcceptSessionID) && |
| 1244 | XdmcpReadARRAY8(&buffer, &AcceptAuthenticationName) && |
| 1245 | XdmcpReadARRAY8(&buffer, &AcceptAuthenticationData) && |
| 1246 | XdmcpReadARRAY8(&buffer, &AcceptAuthorizationName) && |
| 1247 | XdmcpReadARRAY8(&buffer, &AcceptAuthorizationData)) { |
| 1248 | if (length == 12 + AcceptAuthenticationName.length + |
| 1249 | AcceptAuthenticationData.length + |
| 1250 | AcceptAuthorizationName.length + AcceptAuthorizationData.length) { |
| 1251 | if (!XdmcpCheckAuthentication(&AcceptAuthenticationName, |
| 1252 | &AcceptAuthenticationData, ACCEPT)) { |
| 1253 | XdmcpFatal("Authentication Failure", &AcceptAuthenticationName); |
| 1254 | } |
| 1255 | /* permit access control manipulations from this host */ |
| 1256 | AugmentSelf(&req_sockaddr, req_socklen); |
| 1257 | /* if the authorization specified in the packet fails |
| 1258 | * to be acceptable, enable the local addresses |
| 1259 | */ |
| 1260 | if (!XdmcpAddAuthorization(&AcceptAuthorizationName, |
| 1261 | &AcceptAuthorizationData)) { |
| 1262 | AddLocalHosts(); |
| 1263 | } |
| 1264 | SessionID = AcceptSessionID; |
| 1265 | state = XDM_MANAGE; |
| 1266 | send_packet(); |
| 1267 | } |
| 1268 | } |
| 1269 | XdmcpDisposeARRAY8(&AcceptAuthenticationName); |
| 1270 | XdmcpDisposeARRAY8(&AcceptAuthenticationData); |
| 1271 | XdmcpDisposeARRAY8(&AcceptAuthorizationName); |
| 1272 | XdmcpDisposeARRAY8(&AcceptAuthorizationData); |
| 1273 | } |
| 1274 | |
| 1275 | static void |
| 1276 | recv_decline_msg(unsigned length) |
| 1277 | { |
| 1278 | ARRAY8 status, DeclineAuthenticationName, DeclineAuthenticationData; |
| 1279 | |
| 1280 | status.data = 0; |
| 1281 | DeclineAuthenticationName.data = 0; |
| 1282 | DeclineAuthenticationData.data = 0; |
| 1283 | if (XdmcpReadARRAY8(&buffer, &status) && |
| 1284 | XdmcpReadARRAY8(&buffer, &DeclineAuthenticationName) && |
| 1285 | XdmcpReadARRAY8(&buffer, &DeclineAuthenticationData)) { |
| 1286 | if (length == 6 + status.length + |
| 1287 | DeclineAuthenticationName.length + |
| 1288 | DeclineAuthenticationData.length && |
| 1289 | XdmcpCheckAuthentication(&DeclineAuthenticationName, |
| 1290 | &DeclineAuthenticationData, DECLINE)) { |
| 1291 | XdmcpFatal("Session declined", &status); |
| 1292 | } |
| 1293 | } |
| 1294 | XdmcpDisposeARRAY8(&status); |
| 1295 | XdmcpDisposeARRAY8(&DeclineAuthenticationName); |
| 1296 | XdmcpDisposeARRAY8(&DeclineAuthenticationData); |
| 1297 | } |
| 1298 | |
| 1299 | static void |
| 1300 | send_manage_msg(void) |
| 1301 | { |
| 1302 | XdmcpHeader header; |
| 1303 | int socketfd = xdmcpSocket; |
| 1304 | |
| 1305 | header.version = XDM_PROTOCOL_VERSION; |
| 1306 | header.opcode = (CARD16) MANAGE; |
| 1307 | header.length = 8 + DisplayClass.length; |
| 1308 | |
| 1309 | if (!XdmcpWriteHeader(&buffer, &header)) |
| 1310 | return; |
| 1311 | XdmcpWriteCARD32(&buffer, SessionID); |
| 1312 | XdmcpWriteCARD16(&buffer, DisplayNumber); |
| 1313 | XdmcpWriteARRAY8(&buffer, &DisplayClass); |
| 1314 | state = XDM_AWAIT_MANAGE_RESPONSE; |
| 1315 | #if defined(IPv6) && defined(AF_INET6) |
| 1316 | if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6) |
| 1317 | socketfd = xdmcpSocket6; |
| 1318 | #endif |
| 1319 | XdmcpFlush(socketfd, &buffer, (XdmcpNetaddr) &req_sockaddr, req_socklen); |
| 1320 | } |
| 1321 | |
| 1322 | static void |
| 1323 | recv_refuse_msg(unsigned length) |
| 1324 | { |
| 1325 | CARD32 RefusedSessionID; |
| 1326 | |
| 1327 | if (state != XDM_AWAIT_MANAGE_RESPONSE) |
| 1328 | return; |
| 1329 | if (length != 4) |
| 1330 | return; |
| 1331 | if (XdmcpReadCARD32(&buffer, &RefusedSessionID)) { |
| 1332 | if (RefusedSessionID == SessionID) { |
| 1333 | state = XDM_START_CONNECTION; |
| 1334 | send_packet(); |
| 1335 | } |
| 1336 | } |
| 1337 | } |
| 1338 | |
| 1339 | static void |
| 1340 | recv_failed_msg(unsigned length) |
| 1341 | { |
| 1342 | CARD32 FailedSessionID; |
| 1343 | ARRAY8 status; |
| 1344 | |
| 1345 | if (state != XDM_AWAIT_MANAGE_RESPONSE) |
| 1346 | return; |
| 1347 | status.data = 0; |
| 1348 | if (XdmcpReadCARD32(&buffer, &FailedSessionID) && |
| 1349 | XdmcpReadARRAY8(&buffer, &status)) { |
| 1350 | if (length == 6 + status.length && SessionID == FailedSessionID) { |
| 1351 | XdmcpFatal("Session failed", &status); |
| 1352 | } |
| 1353 | } |
| 1354 | XdmcpDisposeARRAY8(&status); |
| 1355 | } |
| 1356 | |
| 1357 | static void |
| 1358 | send_keepalive_msg(void) |
| 1359 | { |
| 1360 | XdmcpHeader header; |
| 1361 | int socketfd = xdmcpSocket; |
| 1362 | |
| 1363 | header.version = XDM_PROTOCOL_VERSION; |
| 1364 | header.opcode = (CARD16) KEEPALIVE; |
| 1365 | header.length = 6; |
| 1366 | |
| 1367 | XdmcpWriteHeader(&buffer, &header); |
| 1368 | XdmcpWriteCARD16(&buffer, DisplayNumber); |
| 1369 | XdmcpWriteCARD32(&buffer, SessionID); |
| 1370 | |
| 1371 | state = XDM_AWAIT_ALIVE_RESPONSE; |
| 1372 | #if defined(IPv6) && defined(AF_INET6) |
| 1373 | if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6) |
| 1374 | socketfd = xdmcpSocket6; |
| 1375 | #endif |
| 1376 | XdmcpFlush(socketfd, &buffer, (XdmcpNetaddr) &req_sockaddr, req_socklen); |
| 1377 | } |
| 1378 | |
| 1379 | static void |
| 1380 | recv_alive_msg(unsigned length) |
| 1381 | { |
| 1382 | CARD8 SessionRunning; |
| 1383 | CARD32 AliveSessionID; |
| 1384 | |
| 1385 | if (state != XDM_AWAIT_ALIVE_RESPONSE) |
| 1386 | return; |
| 1387 | if (length != 5) |
| 1388 | return; |
| 1389 | if (XdmcpReadCARD8(&buffer, &SessionRunning) && |
| 1390 | XdmcpReadCARD32(&buffer, &AliveSessionID)) { |
| 1391 | if (SessionRunning && AliveSessionID == SessionID) { |
| 1392 | /* backoff dormancy period */ |
| 1393 | state = XDM_RUN_SESSION; |
| 1394 | if ((GetTimeInMillis() - LastEventTime(XIAllDevices).milliseconds) > |
| 1395 | keepaliveDormancy * 1000) { |
| 1396 | keepaliveDormancy <<= 1; |
| 1397 | if (keepaliveDormancy > XDM_MAX_DORMANCY) |
| 1398 | keepaliveDormancy = XDM_MAX_DORMANCY; |
| 1399 | } |
| 1400 | timeOutTime = GetTimeInMillis() + keepaliveDormancy * 1000; |
| 1401 | } |
| 1402 | else { |
| 1403 | XdmcpDeadSession("Alive response indicates session dead"); |
| 1404 | } |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | static void |
| 1409 | XdmcpFatal(const char *type, ARRAY8Ptr status) |
| 1410 | { |
| 1411 | FatalError("XDMCP fatal error: %s %*.*s\n", type, |
| 1412 | status->length, status->length, status->data); |
| 1413 | } |
| 1414 | |
| 1415 | static void |
| 1416 | XdmcpWarning(const char *str) |
| 1417 | { |
| 1418 | ErrorF("XDMCP warning: %s\n", str); |
| 1419 | } |
| 1420 | |
| 1421 | static void |
| 1422 | get_addr_by_name(const char *argtype, |
| 1423 | const char *namestr, |
| 1424 | int port, |
| 1425 | int socktype, SOCKADDR_TYPE * addr, SOCKLEN_TYPE * addrlen |
| 1426 | #if defined(IPv6) && defined(AF_INET6) |
| 1427 | , struct addrinfo **aip, struct addrinfo **aifirstp |
| 1428 | #endif |
| 1429 | ) |
| 1430 | { |
| 1431 | #if defined(IPv6) && defined(AF_INET6) |
| 1432 | struct addrinfo *ai; |
| 1433 | struct addrinfo hints; |
| 1434 | char portstr[6]; |
| 1435 | char *pport = portstr; |
| 1436 | int gaierr; |
| 1437 | |
| 1438 | memset(&hints, 0, sizeof(hints)); |
| 1439 | hints.ai_socktype = socktype; |
| 1440 | |
| 1441 | if (port == 0) { |
| 1442 | pport = NULL; |
| 1443 | } |
| 1444 | else if (port > 0 && port < 65535) { |
| 1445 | snprintf(portstr, sizeof(portstr), "%d", port); |
| 1446 | } |
| 1447 | else { |
| 1448 | FatalError("Xserver: port out of range: %d\n", port); |
| 1449 | } |
| 1450 | |
| 1451 | if (*aifirstp != NULL) { |
| 1452 | freeaddrinfo(*aifirstp); |
| 1453 | *aifirstp = NULL; |
| 1454 | } |
| 1455 | |
| 1456 | if ((gaierr = getaddrinfo(namestr, pport, &hints, aifirstp)) == 0) { |
| 1457 | for (ai = *aifirstp; ai != NULL; ai = ai->ai_next) { |
| 1458 | if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6) |
| 1459 | break; |
| 1460 | } |
| 1461 | if ((ai == NULL) || (ai->ai_addrlen > sizeof(SOCKADDR_TYPE))) { |
| 1462 | FatalError("Xserver: %s host %s not on supported network type\n", |
| 1463 | argtype, namestr); |
| 1464 | } |
| 1465 | else { |
| 1466 | *aip = ai; |
| 1467 | *addrlen = ai->ai_addrlen; |
| 1468 | memcpy(addr, ai->ai_addr, ai->ai_addrlen); |
| 1469 | } |
| 1470 | } |
| 1471 | else { |
| 1472 | FatalError("Xserver: %s: %s %s\n", gai_strerror(gaierr), argtype, |
| 1473 | namestr); |
| 1474 | } |
| 1475 | #else |
| 1476 | struct hostent *hep; |
| 1477 | |
| 1478 | #ifdef XTHREADS_NEEDS_BYNAMEPARAMS |
| 1479 | _Xgethostbynameparams hparams; |
| 1480 | #endif |
| 1481 | #if defined(WIN32) && defined(TCPCONN) |
| 1482 | _XSERVTransWSAStartup(); |
| 1483 | #endif |
| 1484 | if (!(hep = _XGethostbyname(namestr, hparams))) { |
| 1485 | FatalError("Xserver: %s unknown host: %s\n", argtype, namestr); |
| 1486 | } |
| 1487 | if (hep->h_length == sizeof(struct in_addr)) { |
| 1488 | memmove(&addr->sin_addr, hep->h_addr, hep->h_length); |
| 1489 | *addrlen = sizeof(struct sockaddr_in); |
| 1490 | addr->sin_family = AF_INET; |
| 1491 | addr->sin_port = htons(port); |
| 1492 | } |
| 1493 | else { |
| 1494 | FatalError("Xserver: %s host on strange network %s\n", argtype, |
| 1495 | namestr); |
| 1496 | } |
| 1497 | #endif |
| 1498 | } |
| 1499 | |
| 1500 | static void |
| 1501 | get_manager_by_name(int argc, char **argv, int i) |
| 1502 | { |
| 1503 | |
| 1504 | if ((i + 1) == argc) { |
| 1505 | FatalError("Xserver: missing %s host name in command line\n", argv[i]); |
| 1506 | } |
| 1507 | |
| 1508 | get_addr_by_name(argv[i], argv[i + 1], xdm_udp_port, SOCK_DGRAM, |
| 1509 | &ManagerAddress, &ManagerAddressLen |
| 1510 | #if defined(IPv6) && defined(AF_INET6) |
| 1511 | , &mgrAddr, &mgrAddrFirst |
| 1512 | #endif |
| 1513 | ); |
| 1514 | } |
| 1515 | |
| 1516 | static void |
| 1517 | get_fromaddr_by_name(int argc, char **argv, int i) |
| 1518 | { |
| 1519 | #if defined(IPv6) && defined(AF_INET6) |
| 1520 | struct addrinfo *ai = NULL; |
| 1521 | struct addrinfo *aifirst = NULL; |
| 1522 | #endif |
| 1523 | if (i == argc) { |
| 1524 | FatalError("Xserver: missing -from host name in command line\n"); |
| 1525 | } |
| 1526 | get_addr_by_name("-from", argv[i], 0, 0, &FromAddress, &FromAddressLen |
| 1527 | #if defined(IPv6) && defined(AF_INET6) |
| 1528 | , &ai, &aifirst |
| 1529 | #endif |
| 1530 | ); |
| 1531 | #if defined(IPv6) && defined(AF_INET6) |
| 1532 | if (aifirst != NULL) |
| 1533 | freeaddrinfo(aifirst); |
| 1534 | #endif |
| 1535 | xdm_from = argv[i]; |
| 1536 | } |
| 1537 | |
| 1538 | #if defined(IPv6) && defined(AF_INET6) |
| 1539 | static int |
| 1540 | get_mcast_options(int argc, char **argv, int i) |
| 1541 | { |
| 1542 | const char *address = XDM_DEFAULT_MCAST_ADDR6; |
| 1543 | int hopcount = 1; |
| 1544 | struct addrinfo hints; |
| 1545 | char portstr[6]; |
| 1546 | int gaierr; |
| 1547 | struct addrinfo *ai, *firstai; |
| 1548 | |
| 1549 | if ((i < argc) && (argv[i][0] != '-') && (argv[i][0] != '+')) { |
| 1550 | address = argv[i++]; |
| 1551 | if ((i < argc) && (argv[i][0] != '-') && (argv[i][0] != '+')) { |
| 1552 | hopcount = strtol(argv[i++], NULL, 10); |
| 1553 | if ((hopcount < 1) || (hopcount > 255)) { |
| 1554 | FatalError("Xserver: multicast hop count out of range: %d\n", |
| 1555 | hopcount); |
| 1556 | } |
| 1557 | } |
| 1558 | } |
| 1559 | |
| 1560 | if (xdm_udp_port > 0 && xdm_udp_port < 65535) { |
| 1561 | snprintf(portstr, sizeof(portstr), "%d", xdm_udp_port); |
| 1562 | } |
| 1563 | else { |
| 1564 | FatalError("Xserver: port out of range: %d\n", xdm_udp_port); |
| 1565 | } |
| 1566 | memset(&hints, 0, sizeof(hints)); |
| 1567 | hints.ai_socktype = SOCK_DGRAM; |
| 1568 | |
| 1569 | if ((gaierr = getaddrinfo(address, portstr, &hints, &firstai)) == 0) { |
| 1570 | for (ai = firstai; ai != NULL; ai = ai->ai_next) { |
| 1571 | if (((ai->ai_family == AF_INET) && |
| 1572 | IN_MULTICAST(((struct sockaddr_in *) ai->ai_addr) |
| 1573 | ->sin_addr.s_addr)) |
| 1574 | || ((ai->ai_family == AF_INET6) && |
| 1575 | IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *) ai->ai_addr) |
| 1576 | ->sin6_addr))) |
| 1577 | break; |
| 1578 | } |
| 1579 | if (ai == NULL) { |
| 1580 | FatalError("Xserver: address not supported multicast type %s\n", |
| 1581 | address); |
| 1582 | } |
| 1583 | else { |
| 1584 | struct multicastinfo *mcastinfo, *mcl; |
| 1585 | |
| 1586 | mcastinfo = malloc(sizeof(struct multicastinfo)); |
| 1587 | mcastinfo->next = NULL; |
| 1588 | mcastinfo->ai = firstai; |
| 1589 | mcastinfo->hops = hopcount; |
| 1590 | |
| 1591 | if (mcastlist == NULL) { |
| 1592 | mcastlist = mcastinfo; |
| 1593 | } |
| 1594 | else { |
| 1595 | for (mcl = mcastlist; mcl->next != NULL; mcl = mcl->next) { |
| 1596 | /* Do nothing - just find end of list */ |
| 1597 | } |
| 1598 | mcl->next = mcastinfo; |
| 1599 | } |
| 1600 | } |
| 1601 | } |
| 1602 | else { |
| 1603 | FatalError("Xserver: %s: %s\n", gai_strerror(gaierr), address); |
| 1604 | } |
| 1605 | return i; |
| 1606 | } |
| 1607 | #endif |
| 1608 | |
| 1609 | #else |
| 1610 | static int xdmcp_non_empty; /* avoid complaint by ranlib */ |
| 1611 | #endif /* XDMCP */ |