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Diffstat (limited to 'xorg-server/os/xdmcp.c')
-rw-r--r--xorg-server/os/xdmcp.c3322
1 files changed, 1661 insertions, 1661 deletions
diff --git a/xorg-server/os/xdmcp.c b/xorg-server/os/xdmcp.c
index 8da2cb05c..46440718c 100644
--- a/xorg-server/os/xdmcp.c
+++ b/xorg-server/os/xdmcp.c
@@ -1,1661 +1,1661 @@
-/*
- * Copyright 1989 Network Computing Devices, Inc., Mountain View, California.
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation, and that the name of N.C.D. not be used in advertising or
- * publicity pertaining to distribution of the software without specific,
- * written prior permission. N.C.D. makes no representations about the
- * suitability of this software for any purpose. It is provided "as is"
- * without express or implied warranty.
- *
- */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#ifdef WIN32
-#include <X11/Xwinsock.h>
-#endif
-
-#include <X11/Xos.h>
-
-#if !defined(WIN32)
-#include <sys/param.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <X11/X.h>
-#include <X11/Xmd.h>
-#include "misc.h"
-#include <X11/Xpoll.h>
-#include "osdep.h"
-#include "input.h"
-#include "dixstruct.h"
-#include "opaque.h"
-#include "site.h"
-
-#ifdef STREAMSCONN
-#include <tiuser.h>
-#include <netconfig.h>
-#include <netdir.h>
-#endif
-
-#ifdef XDMCP
-#undef REQUEST
-
-#ifdef XDMCP_NO_IPV6
-#undef IPv6
-#endif
-
-#include <X11/Xdmcp.h>
-
-#define X_INCLUDE_NETDB_H
-#include <X11/Xos_r.h>
-
-static char *defaultDisplayClass = COMPILEDDISPLAYCLASS;
-
-static int xdmcpSocket, sessionSocket;
-static xdmcp_states state;
-#if defined(IPv6) && defined(AF_INET6)
-static int xdmcpSocket6;
-static struct sockaddr_storage req_sockaddr;
-#else
-static struct sockaddr_in req_sockaddr;
-#endif
-static int req_socklen;
-static CARD32 SessionID;
-static CARD32 timeOutTime;
-static int timeOutRtx;
-static CARD32 defaultKeepaliveDormancy = XDM_DEF_DORMANCY;
-static CARD32 keepaliveDormancy = XDM_DEF_DORMANCY;
-static CARD16 DisplayNumber;
-static xdmcp_states XDM_INIT_STATE = XDM_OFF;
-#ifdef HASXDMAUTH
-static char *xdmAuthCookie;
-#endif
-
-static XdmcpBuffer buffer;
-
-#if defined(IPv6) && defined(AF_INET6)
-
-static struct addrinfo *mgrAddr;
-static struct addrinfo *mgrAddrFirst;
-
-#define SOCKADDR_TYPE struct sockaddr_storage
-#define SOCKADDR_FAMILY(s) ((struct sockaddr *)&(s))->sa_family
-
-#ifdef BSD44SOCKETS
-#define SOCKLEN_FIELD(s) ((struct sockaddr *)&(s))->sa_len
-#define SOCKLEN_TYPE unsigned char
-#else
-#define SOCKLEN_TYPE unsigned int
-#endif
-
-#else
-
-#define SOCKADDR_TYPE struct sockaddr_in
-#define SOCKADDR_FAMILY(s) (s).sin_family
-
-#ifdef BSD44SOCKETS
-#define SOCKLEN_FIELD(s) (s).sin_len
-#define SOCKLEN_TYPE unsigned char
-#else
-#define SOCKLEN_TYPE size_t
-#endif
-
-#endif
-
-static SOCKADDR_TYPE ManagerAddress;
-static SOCKADDR_TYPE FromAddress;
-
-#ifdef SOCKLEN_FIELD
-#define ManagerAddressLen SOCKLEN_FIELD(ManagerAddress)
-#define FromAddressLen SOCKLEN_FIELD(FromAddress)
-#else
-static SOCKLEN_TYPE ManagerAddressLen, FromAddressLen;
-#endif
-
-#if defined(IPv6) && defined(AF_INET6)
-static struct multicastinfo {
- struct multicastinfo *next;
- struct addrinfo *ai;
- int hops;
-} *mcastlist;
-#endif
-
-static void XdmcpAddHost(
- const struct sockaddr *from,
- int fromlen,
- ARRAY8Ptr AuthenticationName,
- ARRAY8Ptr hostname,
- ARRAY8Ptr status);
-
-static void XdmcpSelectHost(
- const struct sockaddr *host_sockaddr,
- int host_len,
- ARRAY8Ptr AuthenticationName);
-
-static void get_xdmcp_sock(void);
-
-static void send_query_msg(void);
-
-static void recv_willing_msg(
- struct sockaddr * /*from*/,
- int /*fromlen*/,
- unsigned /*length*/);
-
-static void send_request_msg(void);
-
-static void recv_accept_msg(unsigned /*length*/);
-
-static void recv_decline_msg(unsigned /*length*/);
-
-static void send_manage_msg(void);
-
-static void recv_refuse_msg(unsigned /*length*/);
-
-static void recv_failed_msg(unsigned /*length*/);
-
-static void send_keepalive_msg(void);
-
-static void recv_alive_msg(unsigned /*length*/);
-
-static void XdmcpFatal(
- const char * /*type*/,
- ARRAY8Ptr /*status*/);
-
-static void XdmcpWarning(const char * /*str*/);
-
-static void get_manager_by_name(
- int /*argc*/,
- char ** /*argv*/,
- int /*i*/);
-
-static void get_fromaddr_by_name(int /*argc*/, char ** /*argv*/, int /*i*/);
-
-#if defined(IPv6) && defined(AF_INET6)
-static int get_mcast_options(int /*argc*/, char ** /*argv*/, int /*i*/);
-#endif
-
-static void receive_packet(int /*socketfd*/);
-
-static void send_packet(void);
-
-static void timeout(void);
-
-static void restart(void);
-
-static void XdmcpBlockHandler(
- pointer /*data*/,
- struct timeval ** /*wt*/,
- pointer /*LastSelectMask*/);
-
-static void XdmcpWakeupHandler(
- pointer /*data*/,
- int /*i*/,
- pointer /*LastSelectMask*/);
-
-/*
- * Register the Manufacturer display ID
- */
-
-static ARRAY8 ManufacturerDisplayID;
-
-static void
-XdmcpRegisterManufacturerDisplayID (const char *name, int length)
-{
- int i;
-
- XdmcpDisposeARRAY8 (&ManufacturerDisplayID);
- if (!XdmcpAllocARRAY8 (&ManufacturerDisplayID, length))
- return;
- for (i = 0; i < length; i++)
- ManufacturerDisplayID.data[i] = (CARD8) name[i];
-}
-
-static unsigned short xdm_udp_port = XDM_UDP_PORT;
-static Bool OneSession = FALSE;
-static const char *xdm_from = NULL;
-
-void
-XdmcpUseMsg (void)
-{
- ErrorF("-query host-name contact named host for XDMCP\n");
- ErrorF("-broadcast broadcast for XDMCP\n");
-#if defined(IPv6) && defined(AF_INET6)
- ErrorF("-multicast [addr [hops]] IPv6 multicast for XDMCP\n");
-#endif
- ErrorF("-indirect host-name contact named host for indirect XDMCP\n");
- ErrorF("-port port-num UDP port number to send messages to\n");
- ErrorF("-from local-address specify the local address to connect from\n");
- ErrorF("-once Terminate server after one session\n");
- ErrorF("-class display-class specify display class to send in manage\n");
-#ifdef HASXDMAUTH
- ErrorF("-cookie xdm-auth-bits specify the magic cookie for XDMCP\n");
-#endif
- ErrorF("-displayID display-id manufacturer display ID for request\n");
-}
-
-int
-XdmcpOptions(int argc, char **argv, int i)
-{
- if (strcmp(argv[i], "-query") == 0) {
- get_manager_by_name(argc, argv, i++);
- XDM_INIT_STATE = XDM_QUERY;
- AccessUsingXdmcp ();
- return i + 1;
- }
- if (strcmp(argv[i], "-broadcast") == 0) {
- XDM_INIT_STATE = XDM_BROADCAST;
- AccessUsingXdmcp ();
- return i + 1;
- }
-#if defined(IPv6) && defined(AF_INET6)
- if (strcmp(argv[i], "-multicast") == 0) {
- i = get_mcast_options(argc, argv, ++i);
- XDM_INIT_STATE = XDM_MULTICAST;
- AccessUsingXdmcp ();
- return i + 1;
- }
-#endif
- if (strcmp(argv[i], "-indirect") == 0) {
- get_manager_by_name(argc, argv, i++);
- XDM_INIT_STATE = XDM_INDIRECT;
- AccessUsingXdmcp ();
- return i + 1;
- }
- if (strcmp(argv[i], "-port") == 0) {
- if (++i == argc) {
- FatalError("Xserver: missing port number in command line\n");
- }
- xdm_udp_port = (unsigned short) atoi(argv[i]);
- return i + 1;
- }
- if (strcmp(argv[i], "-from") == 0) {
- get_fromaddr_by_name(argc, argv, ++i);
- return i + 1;
- }
- if (strcmp(argv[i], "-once") == 0) {
- OneSession = TRUE;
- return i + 1;
- }
- if (strcmp(argv[i], "-class") == 0) {
- if (++i == argc) {
- FatalError("Xserver: missing class name in command line\n");
- }
- defaultDisplayClass = argv[i];
- return i + 1;
- }
-#ifdef HASXDMAUTH
- if (strcmp(argv[i], "-cookie") == 0) {
- if (++i == argc) {
- FatalError("Xserver: missing cookie data in command line\n");
- }
- xdmAuthCookie = argv[i];
- return i + 1;
- }
-#endif
- if (strcmp(argv[i], "-displayID") == 0) {
- if (++i == argc) {
- FatalError("Xserver: missing displayID in command line\n");
- }
- XdmcpRegisterManufacturerDisplayID (argv[i], strlen (argv[i]));
- return i + 1;
- }
- return i;
-}
-
-/*
- * This section is a collection of routines for
- * registering server-specific data with the XDMCP
- * state machine.
- */
-
-
-/*
- * Save all broadcast addresses away so BroadcastQuery
- * packets get sent everywhere
- */
-
-#define MAX_BROADCAST 10
-
-/* This stays sockaddr_in since IPv6 doesn't support broadcast */
-static struct sockaddr_in BroadcastAddresses[MAX_BROADCAST];
-static int NumBroadcastAddresses;
-
-void
-XdmcpRegisterBroadcastAddress (const struct sockaddr_in *addr)
-{
- struct sockaddr_in *bcast;
- if (NumBroadcastAddresses >= MAX_BROADCAST)
- return;
- bcast = &BroadcastAddresses[NumBroadcastAddresses++];
- memset(bcast, 0, sizeof (struct sockaddr_in));
-#ifdef BSD44SOCKETS
- bcast->sin_len = addr->sin_len;
-#endif
- bcast->sin_family = addr->sin_family;
- bcast->sin_port = htons (xdm_udp_port);
- bcast->sin_addr = addr->sin_addr;
-}
-
-/*
- * Each authentication type is registered here; Validator
- * will be called to check all access attempts using
- * the specified authentication type
- */
-
-static ARRAYofARRAY8 AuthenticationNames, AuthenticationDatas;
-typedef struct _AuthenticationFuncs {
- ValidatorFunc Validator;
- GeneratorFunc Generator;
- AddAuthorFunc AddAuth;
-} AuthenticationFuncsRec, *AuthenticationFuncsPtr;
-
-static AuthenticationFuncsPtr AuthenticationFuncsList;
-
-void
-XdmcpRegisterAuthentication (
- const char *name,
- int namelen,
- const char *data,
- int datalen,
- ValidatorFunc Validator,
- GeneratorFunc Generator,
- AddAuthorFunc AddAuth)
-{
- int i;
- ARRAY8 AuthenticationName, AuthenticationData;
- static AuthenticationFuncsPtr newFuncs;
-
- if (!XdmcpAllocARRAY8 (&AuthenticationName, namelen))
- return;
- if (!XdmcpAllocARRAY8 (&AuthenticationData, datalen))
- {
- XdmcpDisposeARRAY8 (&AuthenticationName);
- return;
- }
- for (i = 0; i < namelen; i++)
- AuthenticationName.data[i] = name[i];
- for (i = 0; i < datalen; i++)
- AuthenticationData.data[i] = data[i];
- if (!(XdmcpReallocARRAYofARRAY8 (&AuthenticationNames,
- AuthenticationNames.length + 1) &&
- XdmcpReallocARRAYofARRAY8 (&AuthenticationDatas,
- AuthenticationDatas.length + 1) &&
- (newFuncs = malloc((AuthenticationNames.length + 1) * sizeof (AuthenticationFuncsRec)))))
- {
- XdmcpDisposeARRAY8 (&AuthenticationName);
- XdmcpDisposeARRAY8 (&AuthenticationData);
- return;
- }
- for (i = 0; i < AuthenticationNames.length - 1; i++)
- newFuncs[i] = AuthenticationFuncsList[i];
- newFuncs[AuthenticationNames.length-1].Validator = Validator;
- newFuncs[AuthenticationNames.length-1].Generator = Generator;
- newFuncs[AuthenticationNames.length-1].AddAuth = AddAuth;
- free(AuthenticationFuncsList);
- AuthenticationFuncsList = newFuncs;
- AuthenticationNames.data[AuthenticationNames.length-1] = AuthenticationName;
- AuthenticationDatas.data[AuthenticationDatas.length-1] = AuthenticationData;
-}
-
-/*
- * Select the authentication type to be used; this is
- * set by the manager of the host to be connected to.
- */
-
-static ARRAY8 noAuthenticationName = {(CARD16) 0, (CARD8Ptr) 0};
-static ARRAY8 noAuthenticationData = {(CARD16) 0, (CARD8Ptr) 0};
-static ARRAY8Ptr AuthenticationName = &noAuthenticationName;
-static ARRAY8Ptr AuthenticationData = &noAuthenticationData;
-static AuthenticationFuncsPtr AuthenticationFuncs;
-
-static void
-XdmcpSetAuthentication (const ARRAY8Ptr name)
-{
- int i;
-
- for (i = 0; i < AuthenticationNames.length; i++)
- if (XdmcpARRAY8Equal (&AuthenticationNames.data[i], name))
- {
- AuthenticationName = &AuthenticationNames.data[i];
- AuthenticationData = &AuthenticationDatas.data[i];
- AuthenticationFuncs = &AuthenticationFuncsList[i];
- break;
- }
-}
-
-/*
- * Register the host address for the display
- */
-
-static ARRAY16 ConnectionTypes;
-static ARRAYofARRAY8 ConnectionAddresses;
-static long xdmcpGeneration;
-
-void
-XdmcpRegisterConnection (
- int type,
- const char *address,
- int addrlen)
-{
- int i;
- CARD8 *newAddress;
-
- if (xdmcpGeneration != serverGeneration)
- {
- XdmcpDisposeARRAY16 (&ConnectionTypes);
- XdmcpDisposeARRAYofARRAY8 (&ConnectionAddresses);
- xdmcpGeneration = serverGeneration;
- }
- if (xdm_from != NULL) { /* Only register the requested address */
- const void *regAddr = address;
- const void *fromAddr = NULL;
- int regAddrlen = addrlen;
-
- if (addrlen == sizeof(struct in_addr)) {
- if (SOCKADDR_FAMILY(FromAddress) == AF_INET) {
- fromAddr = &((struct sockaddr_in *)&FromAddress)->sin_addr;
- }
-#if defined(IPv6) && defined(AF_INET6)
- else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET6) &&
- IN6_IS_ADDR_V4MAPPED(
- &((struct sockaddr_in6 *)&FromAddress)->sin6_addr)) {
- fromAddr = &((struct sockaddr_in6 *)&FromAddress)->sin6_addr.s6_addr[12];
- }
-#endif
- }
-#if defined(IPv6) && defined(AF_INET6)
- else if (addrlen == sizeof(struct in6_addr)) {
- if (SOCKADDR_FAMILY(FromAddress) == AF_INET6) {
- fromAddr = &((struct sockaddr_in6 *)&FromAddress)->sin6_addr;
- } else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET) &&
- IN6_IS_ADDR_V4MAPPED((struct in6_addr *) address)) {
- fromAddr = &((struct sockaddr_in *)&FromAddress)->sin_addr;
- regAddr = &((struct sockaddr_in6 *)&address)->sin6_addr.s6_addr[12];
- regAddrlen = sizeof(struct in_addr);
- }
- }
-#endif
- if (!fromAddr || memcmp(regAddr, fromAddr, regAddrlen) != 0) {
- return;
- }
- }
- if (ConnectionAddresses.length + 1 == 256)
- return;
- newAddress = malloc(addrlen * sizeof (CARD8));
- if (!newAddress)
- return;
- if (!XdmcpReallocARRAY16 (&ConnectionTypes, ConnectionTypes.length + 1))
- {
- free(newAddress);
- return;
- }
- if (!XdmcpReallocARRAYofARRAY8 (&ConnectionAddresses,
- ConnectionAddresses.length + 1))
- {
- free(newAddress);
- return;
- }
- ConnectionTypes.data[ConnectionTypes.length - 1] = (CARD16) type;
- for (i = 0; i < addrlen; i++)
- newAddress[i] = address[i];
- ConnectionAddresses.data[ConnectionAddresses.length-1].data = newAddress;
- ConnectionAddresses.data[ConnectionAddresses.length-1].length = addrlen;
-}
-
-/*
- * Register an Authorization Name. XDMCP advertises this list
- * to the manager.
- */
-
-static ARRAYofARRAY8 AuthorizationNames;
-
-void
-XdmcpRegisterAuthorizations (void)
-{
- XdmcpDisposeARRAYofARRAY8 (&AuthorizationNames);
- RegisterAuthorizations ();
-}
-
-void
-XdmcpRegisterAuthorization (const char *name, int namelen)
-{
- ARRAY8 authName;
- int i;
-
- authName.data = malloc(namelen * sizeof (CARD8));
- if (!authName.data)
- return;
- if (!XdmcpReallocARRAYofARRAY8 (&AuthorizationNames, AuthorizationNames.length +1))
- {
- free(authName.data);
- return;
- }
- for (i = 0; i < namelen; i++)
- authName.data[i] = (CARD8) name[i];
- authName.length = namelen;
- AuthorizationNames.data[AuthorizationNames.length-1] = authName;
-}
-
-/*
- * Register the DisplayClass string
- */
-
-static ARRAY8 DisplayClass;
-
-static void
-XdmcpRegisterDisplayClass (const char *name, int length)
-{
- int i;
-
- XdmcpDisposeARRAY8 (&DisplayClass);
- if (!XdmcpAllocARRAY8 (&DisplayClass, length))
- return;
- for (i = 0; i < length; i++)
- DisplayClass.data[i] = (CARD8) name[i];
-}
-
-/*
- * initialize XDMCP; create the socket, compute the display
- * number, set up the state machine
- */
-
-void
-XdmcpInit(void)
-{
- state = XDM_INIT_STATE;
-#ifdef HASXDMAUTH
- if (xdmAuthCookie)
- XdmAuthenticationInit (xdmAuthCookie, strlen (xdmAuthCookie));
-#endif
- if (state != XDM_OFF)
- {
- XdmcpRegisterAuthorizations();
- XdmcpRegisterDisplayClass (defaultDisplayClass, strlen (defaultDisplayClass));
- AccessUsingXdmcp();
- RegisterBlockAndWakeupHandlers (XdmcpBlockHandler, XdmcpWakeupHandler,
- (pointer) 0);
- timeOutRtx = 0;
- DisplayNumber = (CARD16) atoi(display);
- get_xdmcp_sock();
- send_packet();
- }
-}
-
-void
-XdmcpReset (void)
-{
- state = XDM_INIT_STATE;
- if (state != XDM_OFF)
- {
- RegisterBlockAndWakeupHandlers (XdmcpBlockHandler, XdmcpWakeupHandler,
- (pointer) 0);
- timeOutRtx = 0;
- send_packet();
- }
-}
-
-/*
- * Called whenever a new connection is created; notices the
- * first connection and saves it to terminate the session
- * when it is closed
- */
-
-void
-XdmcpOpenDisplay(int sock)
-{
- if (state != XDM_AWAIT_MANAGE_RESPONSE)
- return;
- state = XDM_RUN_SESSION;
- sessionSocket = sock;
-}
-
-void
-XdmcpCloseDisplay(int sock)
-{
- if ((state != XDM_RUN_SESSION && state != XDM_AWAIT_ALIVE_RESPONSE)
- || sessionSocket != sock)
- return;
- state = XDM_INIT_STATE;
- if (OneSession)
- dispatchException |= DE_TERMINATE;
- else
- dispatchException |= DE_RESET;
- isItTimeToYield = TRUE;
-}
-
-/*
- * called before going to sleep, this routine
- * may modify the timeout value about to be sent
- * to select; in this way XDMCP can do appropriate things
- * dynamically while starting up
- */
-
-/*ARGSUSED*/
-static void
-XdmcpBlockHandler(
- pointer data, /* unused */
- struct timeval **wt,
- pointer pReadmask)
-{
- fd_set *LastSelectMask = (fd_set*)pReadmask;
- CARD32 millisToGo;
-
- if (state == XDM_OFF)
- return;
- FD_SET(xdmcpSocket, LastSelectMask);
-#if defined(IPv6) && defined(AF_INET6)
- if (xdmcpSocket6 >= 0)
- FD_SET(xdmcpSocket6, LastSelectMask);
-#endif
- if (timeOutTime == 0)
- return;
- millisToGo = timeOutTime - GetTimeInMillis();
- if ((int) millisToGo < 0)
- millisToGo = 0;
- AdjustWaitForDelay (wt, millisToGo);
-}
-
-/*
- * called after select returns; this routine will
- * recognise when XDMCP packets await and
- * process them appropriately
- */
-
-/*ARGSUSED*/
-static void
-XdmcpWakeupHandler(
- pointer data, /* unused */
- int i,
- pointer pReadmask)
-{
- fd_set* LastSelectMask = (fd_set*)pReadmask;
- fd_set devicesReadable;
-
- if (state == XDM_OFF)
- return;
- if (i > 0)
- {
- if (FD_ISSET(xdmcpSocket, LastSelectMask))
- {
- receive_packet(xdmcpSocket);
- FD_CLR(xdmcpSocket, LastSelectMask);
- }
-#if defined(IPv6) && defined(AF_INET6)
- if (xdmcpSocket6 >= 0 && FD_ISSET(xdmcpSocket6, LastSelectMask))
- {
- receive_packet(xdmcpSocket6);
- FD_CLR(xdmcpSocket6, LastSelectMask);
- }
-#endif
- XFD_ANDSET(&devicesReadable, LastSelectMask, &EnabledDevices);
- if (XFD_ANYSET(&devicesReadable))
- {
- if (state == XDM_AWAIT_USER_INPUT)
- restart();
- else if (state == XDM_RUN_SESSION)
- keepaliveDormancy = defaultKeepaliveDormancy;
- }
- if (XFD_ANYSET(&AllClients) && state == XDM_RUN_SESSION)
- timeOutTime = GetTimeInMillis() + keepaliveDormancy * 1000;
- }
- else if (timeOutTime && (int) (GetTimeInMillis() - timeOutTime) >= 0)
- {
- if (state == XDM_RUN_SESSION)
- {
- state = XDM_KEEPALIVE;
- send_packet();
- }
- else
- timeout();
- }
-}
-
-/*
- * This routine should be called from the routine that drives the
- * user's host menu when the user selects a host
- */
-
-static void
-XdmcpSelectHost(
- const struct sockaddr *host_sockaddr,
- int host_len,
- ARRAY8Ptr AuthenticationName)
-{
- state = XDM_START_CONNECTION;
- memmove(&req_sockaddr, host_sockaddr, host_len);
- req_socklen = host_len;
- XdmcpSetAuthentication (AuthenticationName);
- send_packet();
-}
-
-/*
- * !!! this routine should be replaced by a routine that adds
- * the host to the user's host menu. the current version just
- * selects the first host to respond with willing message.
- */
-
-/*ARGSUSED*/
-static void
-XdmcpAddHost(
- const struct sockaddr *from,
- int fromlen,
- ARRAY8Ptr AuthenticationName,
- ARRAY8Ptr hostname,
- ARRAY8Ptr status)
-{
- XdmcpSelectHost(from, fromlen, AuthenticationName);
-}
-
-/*
- * A message is queued on the socket; read it and
- * do the appropriate thing
- */
-
-static ARRAY8 UnwillingMessage = { (CARD8) 14, (CARD8 *) "Host unwilling" };
-
-static void
-receive_packet(int socketfd)
-{
-#if defined(IPv6) && defined(AF_INET6)
- struct sockaddr_storage from;
-#else
- struct sockaddr_in from;
-#endif
- int fromlen = sizeof(from);
- XdmcpHeader header;
-
- /* read message off socket */
- if (!XdmcpFill (socketfd, &buffer, (XdmcpNetaddr) &from, &fromlen))
- return;
-
- /* reset retransmission backoff */
- timeOutRtx = 0;
-
- if (!XdmcpReadHeader (&buffer, &header))
- return;
-
- if (header.version != XDM_PROTOCOL_VERSION)
- return;
-
- switch (header.opcode) {
- case WILLING:
- recv_willing_msg((struct sockaddr *) &from, fromlen, header.length);
- break;
- case UNWILLING:
- XdmcpFatal("Manager unwilling", &UnwillingMessage);
- break;
- case ACCEPT:
- recv_accept_msg(header.length);
- break;
- case DECLINE:
- recv_decline_msg(header.length);
- break;
- case REFUSE:
- recv_refuse_msg(header.length);
- break;
- case FAILED:
- recv_failed_msg(header.length);
- break;
- case ALIVE:
- recv_alive_msg(header.length);
- break;
- }
-}
-
-/*
- * send the appropriate message given the current state
- */
-
-static void
-send_packet(void)
-{
- int rtx;
- switch (state) {
- case XDM_QUERY:
- case XDM_BROADCAST:
- case XDM_INDIRECT:
-#if defined(IPv6) && defined(AF_INET6)
- case XDM_MULTICAST:
-#endif
- send_query_msg();
- break;
- case XDM_START_CONNECTION:
- send_request_msg();
- break;
- case XDM_MANAGE:
- send_manage_msg();
- break;
- case XDM_KEEPALIVE:
- send_keepalive_msg();
- break;
- default:
- break;
- }
- rtx = (XDM_MIN_RTX << timeOutRtx);
- if (rtx > XDM_MAX_RTX)
- rtx = XDM_MAX_RTX;
- timeOutTime = GetTimeInMillis() + rtx * 1000;
-}
-
-/*
- * The session is declared dead for some reason; too many
- * timeouts, or Keepalive failure.
- */
-
-static void
-XdmcpDeadSession (const char *reason)
-{
- ErrorF ("XDM: %s, declaring session dead\n", reason);
- state = XDM_INIT_STATE;
- isItTimeToYield = TRUE;
- dispatchException |= DE_RESET;
- timeOutTime = 0;
- timeOutRtx = 0;
- send_packet();
-}
-
-/*
- * Timeout waiting for an XDMCP response.
- */
-
-static void
-timeout(void)
-{
- timeOutRtx++;
- if (state == XDM_AWAIT_ALIVE_RESPONSE && timeOutRtx >= XDM_KA_RTX_LIMIT )
- {
- XdmcpDeadSession ("too many keepalive retransmissions");
- return;
- }
- else if (timeOutRtx >= XDM_RTX_LIMIT)
- {
- /* Quit if "-once" specified, otherwise reset and try again. */
- if (OneSession) {
- dispatchException |= DE_TERMINATE;
- ErrorF("XDM: too many retransmissions\n");
- } else {
- XdmcpDeadSession("too many retransmissions");
- }
- return;
- }
-
-#if defined(IPv6) && defined(AF_INET6)
- if (state == XDM_COLLECT_QUERY || state == XDM_COLLECT_INDIRECT_QUERY) {
- /* Try next address */
- for (mgrAddr = mgrAddr->ai_next; ; mgrAddr = mgrAddr->ai_next) {
- if (mgrAddr == NULL) {
- mgrAddr = mgrAddrFirst;
- }
- if (mgrAddr->ai_family == AF_INET
- || mgrAddr->ai_family == AF_INET6)
- break;
- }
-#ifndef SIN6_LEN
- ManagerAddressLen = mgrAddr->ai_addrlen;
-#endif
- memcpy(&ManagerAddress, mgrAddr->ai_addr, mgrAddr->ai_addrlen);
- }
-#endif
-
- switch (state) {
- case XDM_COLLECT_QUERY:
- state = XDM_QUERY;
- break;
- case XDM_COLLECT_BROADCAST_QUERY:
- state = XDM_BROADCAST;
- break;
-#if defined(IPv6) && defined(AF_INET6)
- case XDM_COLLECT_MULTICAST_QUERY:
- state = XDM_MULTICAST;
- break;
-#endif
- case XDM_COLLECT_INDIRECT_QUERY:
- state = XDM_INDIRECT;
- break;
- case XDM_AWAIT_REQUEST_RESPONSE:
- state = XDM_START_CONNECTION;
- break;
- case XDM_AWAIT_MANAGE_RESPONSE:
- state = XDM_MANAGE;
- break;
- case XDM_AWAIT_ALIVE_RESPONSE:
- state = XDM_KEEPALIVE;
- break;
- default:
- break;
- }
- send_packet();
-}
-
-static void
-restart(void)
-{
- state = XDM_INIT_STATE;
- timeOutRtx = 0;
- send_packet();
-}
-
-static int
-XdmcpCheckAuthentication (ARRAY8Ptr Name, ARRAY8Ptr Data, int packet_type)
-{
- return (XdmcpARRAY8Equal (Name, AuthenticationName) &&
- (AuthenticationName->length == 0 ||
- (*AuthenticationFuncs->Validator) (AuthenticationData, Data, packet_type)));
-}
-
-static int
-XdmcpAddAuthorization (ARRAY8Ptr name, ARRAY8Ptr data)
-{
- AddAuthorFunc AddAuth;
-
- if (AuthenticationFuncs && AuthenticationFuncs->AddAuth)
- AddAuth = AuthenticationFuncs->AddAuth;
- else
- AddAuth = AddAuthorization;
- return (*AddAuth) ((unsigned short)name->length,
- (char *)name->data,
- (unsigned short)data->length,
- (char *)data->data);
-}
-
-/*
- * from here to the end of this file are routines private
- * to the state machine.
- */
-
-static void
-get_xdmcp_sock(void)
-{
-#ifdef STREAMSCONN
- struct netconfig *nconf;
-
- if ((xdmcpSocket = t_open("/dev/udp", O_RDWR, 0)) < 0) {
- XdmcpWarning("t_open() of /dev/udp failed");
- return;
- }
-
- if( t_bind(xdmcpSocket,NULL,NULL) < 0 ) {
- XdmcpWarning("UDP socket creation failed");
- t_error("t_bind(xdmcpSocket) failed" );
- t_close(xdmcpSocket);
- return;
- }
-
- /*
- * This part of the code looks contrived. It will actually fit in nicely
- * when the CLTS part of Xtrans is implemented.
- */
-
- if( (nconf=getnetconfigent("udp")) == NULL ) {
- XdmcpWarning("UDP socket creation failed: getnetconfigent()");
- t_unbind(xdmcpSocket);
- t_close(xdmcpSocket);
- return;
- }
-
- if( netdir_options(nconf, ND_SET_BROADCAST, xdmcpSocket, NULL) ) {
- XdmcpWarning("UDP set broadcast option failed: netdir_options()");
- freenetconfigent(nconf);
- t_unbind(xdmcpSocket);
- t_close(xdmcpSocket);
- return;
- }
-
- freenetconfigent(nconf);
-#else
- int soopts = 1;
-
-#if defined(IPv6) && defined(AF_INET6)
- if ((xdmcpSocket6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
- XdmcpWarning("INET6 UDP socket creation failed");
-#endif
- if ((xdmcpSocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
- XdmcpWarning("UDP socket creation failed");
-#ifdef SO_BROADCAST
- else if (setsockopt(xdmcpSocket, SOL_SOCKET, SO_BROADCAST, (char *)&soopts,
- sizeof(soopts)) < 0)
- XdmcpWarning("UDP set broadcast socket-option failed");
-#endif /* SO_BROADCAST */
- if (xdmcpSocket >= 0 && xdm_from != NULL) {
- if (bind(xdmcpSocket, (struct sockaddr *)&FromAddress,
- FromAddressLen) < 0) {
- FatalError("Xserver: failed to bind to -from address: %s\n", xdm_from);
- }
- }
-#endif /* STREAMSCONN */
-}
-
-static void
-send_query_msg(void)
-{
- XdmcpHeader header;
- Bool broadcast = FALSE;
-#if defined(IPv6) && defined(AF_INET6)
- Bool multicast = FALSE;
-#endif
- int i;
- int socketfd = xdmcpSocket;
-
- header.version = XDM_PROTOCOL_VERSION;
- switch(state){
- case XDM_QUERY:
- header.opcode = (CARD16) QUERY;
- state = XDM_COLLECT_QUERY;
- break;
- case XDM_BROADCAST:
- header.opcode = (CARD16) BROADCAST_QUERY;
- state = XDM_COLLECT_BROADCAST_QUERY;
- broadcast = TRUE;
- break;
-#if defined(IPv6) && defined(AF_INET6)
- case XDM_MULTICAST:
- header.opcode = (CARD16) BROADCAST_QUERY;
- state = XDM_COLLECT_MULTICAST_QUERY;
- multicast = TRUE;
- break;
-#endif
- case XDM_INDIRECT:
- header.opcode = (CARD16) INDIRECT_QUERY;
- state = XDM_COLLECT_INDIRECT_QUERY;
- break;
- default:
- break;
- }
- header.length = 1;
- for (i = 0; i < AuthenticationNames.length; i++)
- header.length += 2 + AuthenticationNames.data[i].length;
-
- XdmcpWriteHeader (&buffer, &header);
- XdmcpWriteARRAYofARRAY8 (&buffer, &AuthenticationNames);
- if (broadcast)
- {
- int i;
-
- for (i = 0; i < NumBroadcastAddresses; i++)
- XdmcpFlush (xdmcpSocket, &buffer, (XdmcpNetaddr) &BroadcastAddresses[i],
- sizeof (struct sockaddr_in));
- }
-#if defined(IPv6) && defined(AF_INET6)
- else if (multicast)
- {
- struct multicastinfo *mcl;
- struct addrinfo *ai;
-
- for (mcl = mcastlist; mcl != NULL; mcl = mcl->next) {
- for (ai = mcl->ai ; ai != NULL; ai = ai->ai_next) {
- if (ai->ai_family == AF_INET) {
- unsigned char hopflag = (unsigned char) mcl->hops;
- socketfd = xdmcpSocket;
- setsockopt(socketfd, IPPROTO_IP, IP_MULTICAST_TTL,
- &hopflag, sizeof(hopflag));
- } else if (ai->ai_family == AF_INET6) {
- int hopflag6 = mcl->hops;
- socketfd = xdmcpSocket6;
- setsockopt(socketfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
- &hopflag6, sizeof(hopflag6));
- } else {
- continue;
- }
- XdmcpFlush (socketfd, &buffer,
- (XdmcpNetaddr) ai->ai_addr, ai->ai_addrlen);
- break;
- }
- }
- }
-#endif
- else
- {
-#if defined(IPv6) && defined(AF_INET6)
- if (SOCKADDR_FAMILY(ManagerAddress) == AF_INET6)
- socketfd = xdmcpSocket6;
-#endif
- XdmcpFlush (socketfd, &buffer, (XdmcpNetaddr) &ManagerAddress,
- ManagerAddressLen);
- }
-}
-
-static void
-recv_willing_msg(
- struct sockaddr *from,
- int fromlen,
- unsigned length)
-{
- ARRAY8 authenticationName;
- ARRAY8 hostname;
- ARRAY8 status;
-
- authenticationName.data = 0;
- hostname.data = 0;
- status.data = 0;
- if (XdmcpReadARRAY8 (&buffer, &authenticationName) &&
- XdmcpReadARRAY8 (&buffer, &hostname) &&
- XdmcpReadARRAY8 (&buffer, &status))
- {
- if (length == 6 + authenticationName.length +
- hostname.length + status.length)
- {
- switch (state)
- {
- case XDM_COLLECT_QUERY:
- XdmcpSelectHost(from, fromlen, &authenticationName);
- break;
- case XDM_COLLECT_BROADCAST_QUERY:
-#if defined(IPv6) && defined(AF_INET6)
- case XDM_COLLECT_MULTICAST_QUERY:
-#endif
- case XDM_COLLECT_INDIRECT_QUERY:
- XdmcpAddHost(from, fromlen, &authenticationName, &hostname, &status);
- break;
- default:
- break;
- }
- }
- }
- XdmcpDisposeARRAY8 (&authenticationName);
- XdmcpDisposeARRAY8 (&hostname);
- XdmcpDisposeARRAY8 (&status);
-}
-
-static void
-send_request_msg(void)
-{
- XdmcpHeader header;
- int length;
- int i;
- CARD16 XdmcpConnectionType;
- ARRAY8 authenticationData;
- int socketfd = xdmcpSocket;
-
- switch (SOCKADDR_FAMILY(ManagerAddress))
- {
- case AF_INET: XdmcpConnectionType=FamilyInternet; break;
-#if defined(IPv6) && defined(AF_INET6)
- case AF_INET6: XdmcpConnectionType=FamilyInternet6; break;
-#endif
- default: XdmcpConnectionType=0xffff; break;
- }
-
- header.version = XDM_PROTOCOL_VERSION;
- header.opcode = (CARD16) REQUEST;
-
- length = 2; /* display number */
- length += 1 + 2 * ConnectionTypes.length; /* connection types */
- length += 1; /* connection addresses */
- for (i = 0; i < ConnectionAddresses.length; i++)
- length += 2 + ConnectionAddresses.data[i].length;
- authenticationData.length = 0;
- authenticationData.data = 0;
- if (AuthenticationFuncs)
- {
- (*AuthenticationFuncs->Generator) (AuthenticationData,
- &authenticationData,
- REQUEST);
- }
- length += 2 + AuthenticationName->length; /* authentication name */
- length += 2 + authenticationData.length; /* authentication data */
- length += 1; /* authorization names */
- for (i = 0; i < AuthorizationNames.length; i++)
- length += 2 + AuthorizationNames.data[i].length;
- length += 2 + ManufacturerDisplayID.length; /* display ID */
- header.length = length;
-
- if (!XdmcpWriteHeader (&buffer, &header))
- {
- XdmcpDisposeARRAY8 (&authenticationData);
- return;
- }
- XdmcpWriteCARD16 (&buffer, DisplayNumber);
- XdmcpWriteCARD8 (&buffer, ConnectionTypes.length);
-
- /* The connection array is send reordered, so that connections of */
- /* the same address type as the XDMCP manager connection are send */
- /* first. This works around a bug in xdm. mario@klebsch.de */
- for (i = 0; i < (int)ConnectionTypes.length; i++)
- if (ConnectionTypes.data[i]==XdmcpConnectionType)
- XdmcpWriteCARD16 (&buffer, ConnectionTypes.data[i]);
- for (i = 0; i < (int)ConnectionTypes.length; i++)
- if (ConnectionTypes.data[i]!=XdmcpConnectionType)
- XdmcpWriteCARD16 (&buffer, ConnectionTypes.data[i]);
-
- XdmcpWriteCARD8 (&buffer, ConnectionAddresses.length);
- for (i = 0; i < (int)ConnectionAddresses.length; i++)
- if ( (i<ConnectionTypes.length) &&
- (ConnectionTypes.data[i]==XdmcpConnectionType) )
- XdmcpWriteARRAY8 (&buffer, &ConnectionAddresses.data[i]);
- for (i = 0; i < (int)ConnectionAddresses.length; i++)
- if ( (i>=ConnectionTypes.length) ||
- (ConnectionTypes.data[i]!=XdmcpConnectionType) )
- XdmcpWriteARRAY8 (&buffer, &ConnectionAddresses.data[i]);
-
- XdmcpWriteARRAY8 (&buffer, AuthenticationName);
- XdmcpWriteARRAY8 (&buffer, &authenticationData);
- XdmcpDisposeARRAY8 (&authenticationData);
- XdmcpWriteARRAYofARRAY8 (&buffer, &AuthorizationNames);
- XdmcpWriteARRAY8 (&buffer, &ManufacturerDisplayID);
-#if defined(IPv6) && defined(AF_INET6)
- if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6)
- socketfd = xdmcpSocket6;
-#endif
- if (XdmcpFlush (socketfd, &buffer,
- (XdmcpNetaddr) &req_sockaddr, req_socklen))
- state = XDM_AWAIT_REQUEST_RESPONSE;
-}
-
-static void
-recv_accept_msg(unsigned length)
-{
- CARD32 AcceptSessionID;
- ARRAY8 AcceptAuthenticationName, AcceptAuthenticationData;
- ARRAY8 AcceptAuthorizationName, AcceptAuthorizationData;
-
- if (state != XDM_AWAIT_REQUEST_RESPONSE)
- return;
- AcceptAuthenticationName.data = 0;
- AcceptAuthenticationData.data = 0;
- AcceptAuthorizationName.data = 0;
- AcceptAuthorizationData.data = 0;
- if (XdmcpReadCARD32 (&buffer, &AcceptSessionID) &&
- XdmcpReadARRAY8 (&buffer, &AcceptAuthenticationName) &&
- XdmcpReadARRAY8 (&buffer, &AcceptAuthenticationData) &&
- XdmcpReadARRAY8 (&buffer, &AcceptAuthorizationName) &&
- XdmcpReadARRAY8 (&buffer, &AcceptAuthorizationData))
- {
- if (length == 12 + AcceptAuthenticationName.length +
- AcceptAuthenticationData.length +
- AcceptAuthorizationName.length +
- AcceptAuthorizationData.length)
- {
- if (!XdmcpCheckAuthentication (&AcceptAuthenticationName,
- &AcceptAuthenticationData, ACCEPT))
- {
- XdmcpFatal ("Authentication Failure", &AcceptAuthenticationName);
- }
- /* permit access control manipulations from this host */
- AugmentSelf (&req_sockaddr, req_socklen);
- /* if the authorization specified in the packet fails
- * to be acceptable, enable the local addresses
- */
- if (!XdmcpAddAuthorization (&AcceptAuthorizationName,
- &AcceptAuthorizationData))
- {
- AddLocalHosts ();
- }
- SessionID = AcceptSessionID;
- state = XDM_MANAGE;
- send_packet();
- }
- }
- XdmcpDisposeARRAY8 (&AcceptAuthenticationName);
- XdmcpDisposeARRAY8 (&AcceptAuthenticationData);
- XdmcpDisposeARRAY8 (&AcceptAuthorizationName);
- XdmcpDisposeARRAY8 (&AcceptAuthorizationData);
-}
-
-static void
-recv_decline_msg(unsigned length)
-{
- ARRAY8 status, DeclineAuthenticationName, DeclineAuthenticationData;
-
- status.data = 0;
- DeclineAuthenticationName.data = 0;
- DeclineAuthenticationData.data = 0;
- if (XdmcpReadARRAY8 (&buffer, &status) &&
- XdmcpReadARRAY8 (&buffer, &DeclineAuthenticationName) &&
- XdmcpReadARRAY8 (&buffer, &DeclineAuthenticationData))
- {
- if (length == 6 + status.length +
- DeclineAuthenticationName.length +
- DeclineAuthenticationData.length &&
- XdmcpCheckAuthentication (&DeclineAuthenticationName,
- &DeclineAuthenticationData, DECLINE))
- {
- XdmcpFatal ("Session declined", &status);
- }
- }
- XdmcpDisposeARRAY8 (&status);
- XdmcpDisposeARRAY8 (&DeclineAuthenticationName);
- XdmcpDisposeARRAY8 (&DeclineAuthenticationData);
-}
-
-static void
-send_manage_msg(void)
-{
- XdmcpHeader header;
- int socketfd = xdmcpSocket;
-
- header.version = XDM_PROTOCOL_VERSION;
- header.opcode = (CARD16) MANAGE;
- header.length = 8 + DisplayClass.length;
-
- if (!XdmcpWriteHeader (&buffer, &header))
- return;
- XdmcpWriteCARD32 (&buffer, SessionID);
- XdmcpWriteCARD16 (&buffer, DisplayNumber);
- XdmcpWriteARRAY8 (&buffer, &DisplayClass);
- state = XDM_AWAIT_MANAGE_RESPONSE;
-#if defined(IPv6) && defined(AF_INET6)
- if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6)
- socketfd = xdmcpSocket6;
-#endif
- XdmcpFlush (socketfd, &buffer, (XdmcpNetaddr) &req_sockaddr, req_socklen);
-}
-
-static void
-recv_refuse_msg(unsigned length)
-{
- CARD32 RefusedSessionID;
-
- if (state != XDM_AWAIT_MANAGE_RESPONSE)
- return;
- if (length != 4)
- return;
- if (XdmcpReadCARD32 (&buffer, &RefusedSessionID))
- {
- if (RefusedSessionID == SessionID)
- {
- state = XDM_START_CONNECTION;
- send_packet();
- }
- }
-}
-
-static void
-recv_failed_msg(unsigned length)
-{
- CARD32 FailedSessionID;
- ARRAY8 status;
-
- if (state != XDM_AWAIT_MANAGE_RESPONSE)
- return;
- status.data = 0;
- if (XdmcpReadCARD32 (&buffer, &FailedSessionID) &&
- XdmcpReadARRAY8 (&buffer, &status))
- {
- if (length == 6 + status.length &&
- SessionID == FailedSessionID)
- {
- XdmcpFatal ("Session failed", &status);
- }
- }
- XdmcpDisposeARRAY8 (&status);
-}
-
-static void
-send_keepalive_msg(void)
-{
- XdmcpHeader header;
- int socketfd = xdmcpSocket;
-
- header.version = XDM_PROTOCOL_VERSION;
- header.opcode = (CARD16) KEEPALIVE;
- header.length = 6;
-
- XdmcpWriteHeader (&buffer, &header);
- XdmcpWriteCARD16 (&buffer, DisplayNumber);
- XdmcpWriteCARD32 (&buffer, SessionID);
-
- state = XDM_AWAIT_ALIVE_RESPONSE;
-#if defined(IPv6) && defined(AF_INET6)
- if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6)
- socketfd = xdmcpSocket6;
-#endif
- XdmcpFlush (socketfd, &buffer, (XdmcpNetaddr) &req_sockaddr, req_socklen);
-}
-
-static void
-recv_alive_msg (unsigned length)
-{
- CARD8 SessionRunning;
- CARD32 AliveSessionID;
-
- if (state != XDM_AWAIT_ALIVE_RESPONSE)
- return;
- if (length != 5)
- return;
- if (XdmcpReadCARD8 (&buffer, &SessionRunning) &&
- XdmcpReadCARD32 (&buffer, &AliveSessionID))
- {
- if (SessionRunning && AliveSessionID == SessionID)
- {
- /* backoff dormancy period */
- state = XDM_RUN_SESSION;
- if ((GetTimeInMillis() - lastDeviceEventTime.milliseconds) >
- keepaliveDormancy * 1000)
- {
- keepaliveDormancy <<= 1;
- if (keepaliveDormancy > XDM_MAX_DORMANCY)
- keepaliveDormancy = XDM_MAX_DORMANCY;
- }
- timeOutTime = GetTimeInMillis() + keepaliveDormancy * 1000;
- }
- else
- {
- XdmcpDeadSession ("Alive response indicates session dead");
- }
- }
-}
-
-static void
-XdmcpFatal (
- const char *type,
- ARRAY8Ptr status)
-{
- FatalError ("XDMCP fatal error: %s %*.*s\n", type,
- status->length, status->length, status->data);
-}
-
-static void
-XdmcpWarning(const char *str)
-{
- ErrorF("XDMCP warning: %s\n", str);
-}
-
-static void
-get_addr_by_name(
- const char *argtype,
- const char *namestr,
- int port,
- int socktype,
- SOCKADDR_TYPE *addr,
- SOCKLEN_TYPE *addrlen
-#if defined(IPv6) && defined(AF_INET6)
- ,
- struct addrinfo **aip,
- struct addrinfo **aifirstp
-#endif
- )
-{
-#if defined(IPv6) && defined(AF_INET6)
- struct addrinfo *ai;
- struct addrinfo hints;
- char portstr[6];
- char *pport = portstr;
- int gaierr;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_socktype = socktype;
-
- if (port == 0) {
- pport = NULL;
- } else if (port > 0 && port < 65535) {
- sprintf(portstr, "%d", port);
- } else {
- FatalError("Xserver: port out of range: %d\n", port);
- }
-
- if (*aifirstp != NULL) {
- freeaddrinfo(*aifirstp);
- *aifirstp = NULL;
- }
-
- if ((gaierr = getaddrinfo(namestr, pport, &hints, aifirstp)) == 0) {
- for (ai = *aifirstp; ai != NULL; ai = ai->ai_next) {
- if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6)
- break;
- }
- if ((ai == NULL) || (ai->ai_addrlen > sizeof(SOCKADDR_TYPE))) {
- FatalError ("Xserver: %s host %s not on supported network type\n",
- argtype, namestr);
- } else {
- *aip = ai;
- *addrlen = ai->ai_addrlen;
- memcpy(addr, ai->ai_addr, ai->ai_addrlen);
- }
- } else {
- FatalError("Xserver: %s: %s %s\n", gai_strerror(gaierr), argtype, namestr);
- }
-#else
- struct hostent *hep;
-#ifdef XTHREADS_NEEDS_BYNAMEPARAMS
- _Xgethostbynameparams hparams;
-#endif
-#if defined(WIN32) && defined(TCPCONN)
- _XSERVTransWSAStartup();
-#endif
- if (!(hep = _XGethostbyname(namestr, hparams)))
- {
- FatalError("Xserver: %s unknown host: %s\n", argtype, namestr);
- }
- if (hep->h_length == sizeof (struct in_addr))
- {
- memmove(&addr->sin_addr, hep->h_addr, hep->h_length);
- *addrlen = sizeof(struct sockaddr_in);
- addr->sin_family = AF_INET;
- addr->sin_port = htons (port);
- }
- else
- {
- FatalError("Xserver: %s host on strange network %s\n", argtype, namestr);
- }
-#endif
-}
-
-static void
-get_manager_by_name(
- int argc,
- char **argv,
- int i)
-{
-
- if ((i + 1) == argc)
- {
- FatalError("Xserver: missing %s host name in command line\n", argv[i]);
- }
-
- get_addr_by_name(argv[i], argv[i+1], xdm_udp_port, SOCK_DGRAM,
- &ManagerAddress, &ManagerAddressLen
-#if defined(IPv6) && defined(AF_INET6)
- , &mgrAddr, &mgrAddrFirst
-#endif
- );
-}
-
-
-static void
-get_fromaddr_by_name(
- int argc,
- char **argv,
- int i)
-{
-#if defined(IPv6) && defined(AF_INET6)
- struct addrinfo *ai = NULL;
- struct addrinfo *aifirst = NULL;
-#endif
- if (i == argc)
- {
- FatalError("Xserver: missing -from host name in command line\n");
- }
- get_addr_by_name("-from", argv[i], 0, 0, &FromAddress, &FromAddressLen
-#if defined(IPv6) && defined(AF_INET6)
- , &ai, &aifirst
-#endif
- );
-#if defined(IPv6) && defined(AF_INET6)
- if (aifirst != NULL)
- freeaddrinfo(aifirst);
-#endif
- xdm_from = argv[i];
-}
-
-
-#if defined(IPv6) && defined(AF_INET6)
-static int
-get_mcast_options(int argc, char **argv, int i)
-{
- char *address = XDM_DEFAULT_MCAST_ADDR6;
- int hopcount = 1;
- struct addrinfo hints;
- char portstr[6];
- int gaierr;
- struct addrinfo *ai, *firstai;
-
- if ((i < argc) && (argv[i][0] != '-') && (argv[i][0] != '+')) {
- address = argv[i++];
- if ((i < argc) && (argv[i][0] != '-') && (argv[i][0] != '+')) {
- hopcount = strtol(argv[i++], NULL, 10);
- if ((hopcount < 1) || (hopcount > 255)) {
- FatalError("Xserver: multicast hop count out of range: %d\n",
- hopcount);
- }
- }
- }
-
- if (xdm_udp_port > 0 && xdm_udp_port < 65535) {
- sprintf(portstr, "%d", xdm_udp_port);
- } else {
- FatalError("Xserver: port out of range: %d\n", xdm_udp_port);
- }
- memset(&hints, 0, sizeof(hints));
- hints.ai_socktype = SOCK_DGRAM;
-
- if ((gaierr = getaddrinfo(address, portstr, &hints, &firstai)) == 0) {
- for (ai = firstai; ai != NULL; ai = ai->ai_next) {
- if (((ai->ai_family == AF_INET) &&
- IN_MULTICAST(((struct sockaddr_in *) ai->ai_addr)
- ->sin_addr.s_addr))
- || ((ai->ai_family == AF_INET6) &&
- IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *) ai->ai_addr)
- ->sin6_addr)))
- break;
- }
- if (ai == NULL) {
- FatalError ("Xserver: address not supported multicast type %s\n",
- address);
- } else {
- struct multicastinfo *mcastinfo, *mcl;
-
- mcastinfo = malloc(sizeof(struct multicastinfo));
- mcastinfo->next = NULL;
- mcastinfo->ai = firstai;
- mcastinfo->hops = hopcount;
-
- if (mcastlist == NULL) {
- mcastlist = mcastinfo;
- } else {
- for (mcl = mcastlist; mcl->next != NULL; mcl = mcl->next) {
- /* Do nothing - just find end of list */
- }
- mcl->next = mcastinfo;
- }
- }
- } else {
- FatalError("Xserver: %s: %s\n", gai_strerror(gaierr), address);
- }
- return i;
-}
-#endif
-
-#else
-static int xdmcp_non_empty; /* avoid complaint by ranlib */
-#endif /* XDMCP */
+/*
+ * Copyright 1989 Network Computing Devices, Inc., Mountain View, California.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of N.C.D. not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. N.C.D. makes no representations about the
+ * suitability of this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifdef WIN32
+#include <X11/Xwinsock.h>
+#endif
+
+#include <X11/Xos.h>
+
+#if !defined(WIN32)
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <X11/X.h>
+#include <X11/Xmd.h>
+#include "misc.h"
+#include <X11/Xpoll.h>
+#include "osdep.h"
+#include "input.h"
+#include "dixstruct.h"
+#include "opaque.h"
+#include "site.h"
+
+#ifdef STREAMSCONN
+#include <tiuser.h>
+#include <netconfig.h>
+#include <netdir.h>
+#endif
+
+#ifdef XDMCP
+#undef REQUEST
+
+#ifdef XDMCP_NO_IPV6
+#undef IPv6
+#endif
+
+#include <X11/Xdmcp.h>
+
+#define X_INCLUDE_NETDB_H
+#include <X11/Xos_r.h>
+
+static char *defaultDisplayClass = COMPILEDDISPLAYCLASS;
+
+static int xdmcpSocket, sessionSocket;
+static xdmcp_states state;
+#if defined(IPv6) && defined(AF_INET6)
+static int xdmcpSocket6;
+static struct sockaddr_storage req_sockaddr;
+#else
+static struct sockaddr_in req_sockaddr;
+#endif
+static int req_socklen;
+static CARD32 SessionID;
+static CARD32 timeOutTime;
+static int timeOutRtx;
+static CARD32 defaultKeepaliveDormancy = XDM_DEF_DORMANCY;
+static CARD32 keepaliveDormancy = XDM_DEF_DORMANCY;
+static CARD16 DisplayNumber;
+static xdmcp_states XDM_INIT_STATE = XDM_OFF;
+#ifdef HASXDMAUTH
+static char *xdmAuthCookie;
+#endif
+
+static XdmcpBuffer buffer;
+
+#if defined(IPv6) && defined(AF_INET6)
+
+static struct addrinfo *mgrAddr;
+static struct addrinfo *mgrAddrFirst;
+
+#define SOCKADDR_TYPE struct sockaddr_storage
+#define SOCKADDR_FAMILY(s) ((struct sockaddr *)&(s))->sa_family
+
+#ifdef BSD44SOCKETS
+#define SOCKLEN_FIELD(s) ((struct sockaddr *)&(s))->sa_len
+#define SOCKLEN_TYPE unsigned char
+#else
+#define SOCKLEN_TYPE unsigned int
+#endif
+
+#else
+
+#define SOCKADDR_TYPE struct sockaddr_in
+#define SOCKADDR_FAMILY(s) (s).sin_family
+
+#ifdef BSD44SOCKETS
+#define SOCKLEN_FIELD(s) (s).sin_len
+#define SOCKLEN_TYPE unsigned char
+#else
+#define SOCKLEN_TYPE size_t
+#endif
+
+#endif
+
+static SOCKADDR_TYPE ManagerAddress;
+static SOCKADDR_TYPE FromAddress;
+
+#ifdef SOCKLEN_FIELD
+#define ManagerAddressLen SOCKLEN_FIELD(ManagerAddress)
+#define FromAddressLen SOCKLEN_FIELD(FromAddress)
+#else
+static SOCKLEN_TYPE ManagerAddressLen, FromAddressLen;
+#endif
+
+#if defined(IPv6) && defined(AF_INET6)
+static struct multicastinfo {
+ struct multicastinfo *next;
+ struct addrinfo *ai;
+ int hops;
+} *mcastlist;
+#endif
+
+static void XdmcpAddHost(
+ const struct sockaddr *from,
+ int fromlen,
+ ARRAY8Ptr AuthenticationName,
+ ARRAY8Ptr hostname,
+ ARRAY8Ptr status);
+
+static void XdmcpSelectHost(
+ const struct sockaddr *host_sockaddr,
+ int host_len,
+ ARRAY8Ptr AuthenticationName);
+
+static void get_xdmcp_sock(void);
+
+static void send_query_msg(void);
+
+static void recv_willing_msg(
+ struct sockaddr * /*from*/,
+ int /*fromlen*/,
+ unsigned /*length*/);
+
+static void send_request_msg(void);
+
+static void recv_accept_msg(unsigned /*length*/);
+
+static void recv_decline_msg(unsigned /*length*/);
+
+static void send_manage_msg(void);
+
+static void recv_refuse_msg(unsigned /*length*/);
+
+static void recv_failed_msg(unsigned /*length*/);
+
+static void send_keepalive_msg(void);
+
+static void recv_alive_msg(unsigned /*length*/);
+
+static void XdmcpFatal(
+ const char * /*type*/,
+ ARRAY8Ptr /*status*/);
+
+static void XdmcpWarning(const char * /*str*/);
+
+static void get_manager_by_name(
+ int /*argc*/,
+ char ** /*argv*/,
+ int /*i*/);
+
+static void get_fromaddr_by_name(int /*argc*/, char ** /*argv*/, int /*i*/);
+
+#if defined(IPv6) && defined(AF_INET6)
+static int get_mcast_options(int /*argc*/, char ** /*argv*/, int /*i*/);
+#endif
+
+static void receive_packet(int /*socketfd*/);
+
+static void send_packet(void);
+
+static void timeout(void);
+
+static void restart(void);
+
+static void XdmcpBlockHandler(
+ pointer /*data*/,
+ struct timeval ** /*wt*/,
+ pointer /*LastSelectMask*/);
+
+static void XdmcpWakeupHandler(
+ pointer /*data*/,
+ int /*i*/,
+ pointer /*LastSelectMask*/);
+
+/*
+ * Register the Manufacturer display ID
+ */
+
+static ARRAY8 ManufacturerDisplayID;
+
+static void
+XdmcpRegisterManufacturerDisplayID (const char *name, int length)
+{
+ int i;
+
+ XdmcpDisposeARRAY8 (&ManufacturerDisplayID);
+ if (!XdmcpAllocARRAY8 (&ManufacturerDisplayID, length))
+ return;
+ for (i = 0; i < length; i++)
+ ManufacturerDisplayID.data[i] = (CARD8) name[i];
+}
+
+static unsigned short xdm_udp_port = XDM_UDP_PORT;
+static Bool OneSession = FALSE;
+static const char *xdm_from = NULL;
+
+void
+XdmcpUseMsg (void)
+{
+ ErrorF("-query host-name contact named host for XDMCP\n");
+ ErrorF("-broadcast broadcast for XDMCP\n");
+#if defined(IPv6) && defined(AF_INET6)
+ ErrorF("-multicast [addr [hops]] IPv6 multicast for XDMCP\n");
+#endif
+ ErrorF("-indirect host-name contact named host for indirect XDMCP\n");
+ ErrorF("-port port-num UDP port number to send messages to\n");
+ ErrorF("-from local-address specify the local address to connect from\n");
+ ErrorF("-once Terminate server after one session\n");
+ ErrorF("-class display-class specify display class to send in manage\n");
+#ifdef HASXDMAUTH
+ ErrorF("-cookie xdm-auth-bits specify the magic cookie for XDMCP\n");
+#endif
+ ErrorF("-displayID display-id manufacturer display ID for request\n");
+}
+
+int
+XdmcpOptions(int argc, char **argv, int i)
+{
+ if (strcmp(argv[i], "-query") == 0) {
+ get_manager_by_name(argc, argv, i++);
+ XDM_INIT_STATE = XDM_QUERY;
+ AccessUsingXdmcp ();
+ return i + 1;
+ }
+ if (strcmp(argv[i], "-broadcast") == 0) {
+ XDM_INIT_STATE = XDM_BROADCAST;
+ AccessUsingXdmcp ();
+ return i + 1;
+ }
+#if defined(IPv6) && defined(AF_INET6)
+ if (strcmp(argv[i], "-multicast") == 0) {
+ i = get_mcast_options(argc, argv, ++i);
+ XDM_INIT_STATE = XDM_MULTICAST;
+ AccessUsingXdmcp ();
+ return i + 1;
+ }
+#endif
+ if (strcmp(argv[i], "-indirect") == 0) {
+ get_manager_by_name(argc, argv, i++);
+ XDM_INIT_STATE = XDM_INDIRECT;
+ AccessUsingXdmcp ();
+ return i + 1;
+ }
+ if (strcmp(argv[i], "-port") == 0) {
+ if (++i == argc) {
+ FatalError("Xserver: missing port number in command line\n");
+ }
+ xdm_udp_port = (unsigned short) atoi(argv[i]);
+ return i + 1;
+ }
+ if (strcmp(argv[i], "-from") == 0) {
+ get_fromaddr_by_name(argc, argv, ++i);
+ return i + 1;
+ }
+ if (strcmp(argv[i], "-once") == 0) {
+ OneSession = TRUE;
+ return i + 1;
+ }
+ if (strcmp(argv[i], "-class") == 0) {
+ if (++i == argc) {
+ FatalError("Xserver: missing class name in command line\n");
+ }
+ defaultDisplayClass = argv[i];
+ return i + 1;
+ }
+#ifdef HASXDMAUTH
+ if (strcmp(argv[i], "-cookie") == 0) {
+ if (++i == argc) {
+ FatalError("Xserver: missing cookie data in command line\n");
+ }
+ xdmAuthCookie = argv[i];
+ return i + 1;
+ }
+#endif
+ if (strcmp(argv[i], "-displayID") == 0) {
+ if (++i == argc) {
+ FatalError("Xserver: missing displayID in command line\n");
+ }
+ XdmcpRegisterManufacturerDisplayID (argv[i], strlen (argv[i]));
+ return i + 1;
+ }
+ return i;
+}
+
+/*
+ * This section is a collection of routines for
+ * registering server-specific data with the XDMCP
+ * state machine.
+ */
+
+
+/*
+ * Save all broadcast addresses away so BroadcastQuery
+ * packets get sent everywhere
+ */
+
+#define MAX_BROADCAST 10
+
+/* This stays sockaddr_in since IPv6 doesn't support broadcast */
+static struct sockaddr_in BroadcastAddresses[MAX_BROADCAST];
+static int NumBroadcastAddresses;
+
+void
+XdmcpRegisterBroadcastAddress (const struct sockaddr_in *addr)
+{
+ struct sockaddr_in *bcast;
+ if (NumBroadcastAddresses >= MAX_BROADCAST)
+ return;
+ bcast = &BroadcastAddresses[NumBroadcastAddresses++];
+ memset(bcast, 0, sizeof (struct sockaddr_in));
+#ifdef BSD44SOCKETS
+ bcast->sin_len = addr->sin_len;
+#endif
+ bcast->sin_family = addr->sin_family;
+ bcast->sin_port = htons (xdm_udp_port);
+ bcast->sin_addr = addr->sin_addr;
+}
+
+/*
+ * Each authentication type is registered here; Validator
+ * will be called to check all access attempts using
+ * the specified authentication type
+ */
+
+static ARRAYofARRAY8 AuthenticationNames, AuthenticationDatas;
+typedef struct _AuthenticationFuncs {
+ ValidatorFunc Validator;
+ GeneratorFunc Generator;
+ AddAuthorFunc AddAuth;
+} AuthenticationFuncsRec, *AuthenticationFuncsPtr;
+
+static AuthenticationFuncsPtr AuthenticationFuncsList;
+
+void
+XdmcpRegisterAuthentication (
+ const char *name,
+ int namelen,
+ const char *data,
+ int datalen,
+ ValidatorFunc Validator,
+ GeneratorFunc Generator,
+ AddAuthorFunc AddAuth)
+{
+ int i;
+ ARRAY8 AuthenticationName, AuthenticationData;
+ static AuthenticationFuncsPtr newFuncs;
+
+ if (!XdmcpAllocARRAY8 (&AuthenticationName, namelen))
+ return;
+ if (!XdmcpAllocARRAY8 (&AuthenticationData, datalen))
+ {
+ XdmcpDisposeARRAY8 (&AuthenticationName);
+ return;
+ }
+ for (i = 0; i < namelen; i++)
+ AuthenticationName.data[i] = name[i];
+ for (i = 0; i < datalen; i++)
+ AuthenticationData.data[i] = data[i];
+ if (!(XdmcpReallocARRAYofARRAY8 (&AuthenticationNames,
+ AuthenticationNames.length + 1) &&
+ XdmcpReallocARRAYofARRAY8 (&AuthenticationDatas,
+ AuthenticationDatas.length + 1) &&
+ (newFuncs = malloc((AuthenticationNames.length + 1) * sizeof (AuthenticationFuncsRec)))))
+ {
+ XdmcpDisposeARRAY8 (&AuthenticationName);
+ XdmcpDisposeARRAY8 (&AuthenticationData);
+ return;
+ }
+ for (i = 0; i < AuthenticationNames.length - 1; i++)
+ newFuncs[i] = AuthenticationFuncsList[i];
+ newFuncs[AuthenticationNames.length-1].Validator = Validator;
+ newFuncs[AuthenticationNames.length-1].Generator = Generator;
+ newFuncs[AuthenticationNames.length-1].AddAuth = AddAuth;
+ free(AuthenticationFuncsList);
+ AuthenticationFuncsList = newFuncs;
+ AuthenticationNames.data[AuthenticationNames.length-1] = AuthenticationName;
+ AuthenticationDatas.data[AuthenticationDatas.length-1] = AuthenticationData;
+}
+
+/*
+ * Select the authentication type to be used; this is
+ * set by the manager of the host to be connected to.
+ */
+
+static ARRAY8 noAuthenticationName = {(CARD16) 0, (CARD8Ptr) 0};
+static ARRAY8 noAuthenticationData = {(CARD16) 0, (CARD8Ptr) 0};
+static ARRAY8Ptr AuthenticationName = &noAuthenticationName;
+static ARRAY8Ptr AuthenticationData = &noAuthenticationData;
+static AuthenticationFuncsPtr AuthenticationFuncs;
+
+static void
+XdmcpSetAuthentication (const ARRAY8Ptr name)
+{
+ int i;
+
+ for (i = 0; i < AuthenticationNames.length; i++)
+ if (XdmcpARRAY8Equal (&AuthenticationNames.data[i], name))
+ {
+ AuthenticationName = &AuthenticationNames.data[i];
+ AuthenticationData = &AuthenticationDatas.data[i];
+ AuthenticationFuncs = &AuthenticationFuncsList[i];
+ break;
+ }
+}
+
+/*
+ * Register the host address for the display
+ */
+
+static ARRAY16 ConnectionTypes;
+static ARRAYofARRAY8 ConnectionAddresses;
+static long xdmcpGeneration;
+
+void
+XdmcpRegisterConnection (
+ int type,
+ const char *address,
+ int addrlen)
+{
+ int i;
+ CARD8 *newAddress;
+
+ if (xdmcpGeneration != serverGeneration)
+ {
+ XdmcpDisposeARRAY16 (&ConnectionTypes);
+ XdmcpDisposeARRAYofARRAY8 (&ConnectionAddresses);
+ xdmcpGeneration = serverGeneration;
+ }
+ if (xdm_from != NULL) { /* Only register the requested address */
+ const void *regAddr = address;
+ const void *fromAddr = NULL;
+ int regAddrlen = addrlen;
+
+ if (addrlen == sizeof(struct in_addr)) {
+ if (SOCKADDR_FAMILY(FromAddress) == AF_INET) {
+ fromAddr = &((struct sockaddr_in *)&FromAddress)->sin_addr;
+ }
+#if defined(IPv6) && defined(AF_INET6)
+ else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET6) &&
+ IN6_IS_ADDR_V4MAPPED(
+ &((struct sockaddr_in6 *)&FromAddress)->sin6_addr)) {
+ fromAddr = &((struct sockaddr_in6 *)&FromAddress)->sin6_addr.s6_addr[12];
+ }
+#endif
+ }
+#if defined(IPv6) && defined(AF_INET6)
+ else if (addrlen == sizeof(struct in6_addr)) {
+ if (SOCKADDR_FAMILY(FromAddress) == AF_INET6) {
+ fromAddr = &((struct sockaddr_in6 *)&FromAddress)->sin6_addr;
+ } else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET) &&
+ IN6_IS_ADDR_V4MAPPED((struct in6_addr *) address)) {
+ fromAddr = &((struct sockaddr_in *)&FromAddress)->sin_addr;
+ regAddr = &((struct sockaddr_in6 *)&address)->sin6_addr.s6_addr[12];
+ regAddrlen = sizeof(struct in_addr);
+ }
+ }
+#endif
+ if (!fromAddr || memcmp(regAddr, fromAddr, regAddrlen) != 0) {
+ return;
+ }
+ }
+ if (ConnectionAddresses.length + 1 == 256)
+ return;
+ newAddress = malloc(addrlen * sizeof (CARD8));
+ if (!newAddress)
+ return;
+ if (!XdmcpReallocARRAY16 (&ConnectionTypes, ConnectionTypes.length + 1))
+ {
+ free(newAddress);
+ return;
+ }
+ if (!XdmcpReallocARRAYofARRAY8 (&ConnectionAddresses,
+ ConnectionAddresses.length + 1))
+ {
+ free(newAddress);
+ return;
+ }
+ ConnectionTypes.data[ConnectionTypes.length - 1] = (CARD16) type;
+ for (i = 0; i < addrlen; i++)
+ newAddress[i] = address[i];
+ ConnectionAddresses.data[ConnectionAddresses.length-1].data = newAddress;
+ ConnectionAddresses.data[ConnectionAddresses.length-1].length = addrlen;
+}
+
+/*
+ * Register an Authorization Name. XDMCP advertises this list
+ * to the manager.
+ */
+
+static ARRAYofARRAY8 AuthorizationNames;
+
+void
+XdmcpRegisterAuthorizations (void)
+{
+ XdmcpDisposeARRAYofARRAY8 (&AuthorizationNames);
+ RegisterAuthorizations ();
+}
+
+void
+XdmcpRegisterAuthorization (const char *name, int namelen)
+{
+ ARRAY8 authName;
+ int i;
+
+ authName.data = malloc(namelen * sizeof (CARD8));
+ if (!authName.data)
+ return;
+ if (!XdmcpReallocARRAYofARRAY8 (&AuthorizationNames, AuthorizationNames.length +1))
+ {
+ free(authName.data);
+ return;
+ }
+ for (i = 0; i < namelen; i++)
+ authName.data[i] = (CARD8) name[i];
+ authName.length = namelen;
+ AuthorizationNames.data[AuthorizationNames.length-1] = authName;
+}
+
+/*
+ * Register the DisplayClass string
+ */
+
+static ARRAY8 DisplayClass;
+
+static void
+XdmcpRegisterDisplayClass (const char *name, int length)
+{
+ int i;
+
+ XdmcpDisposeARRAY8 (&DisplayClass);
+ if (!XdmcpAllocARRAY8 (&DisplayClass, length))
+ return;
+ for (i = 0; i < length; i++)
+ DisplayClass.data[i] = (CARD8) name[i];
+}
+
+/*
+ * initialize XDMCP; create the socket, compute the display
+ * number, set up the state machine
+ */
+
+void
+XdmcpInit(void)
+{
+ state = XDM_INIT_STATE;
+#ifdef HASXDMAUTH
+ if (xdmAuthCookie)
+ XdmAuthenticationInit (xdmAuthCookie, strlen (xdmAuthCookie));
+#endif
+ if (state != XDM_OFF)
+ {
+ XdmcpRegisterAuthorizations();
+ XdmcpRegisterDisplayClass (defaultDisplayClass, strlen (defaultDisplayClass));
+ AccessUsingXdmcp();
+ RegisterBlockAndWakeupHandlers (XdmcpBlockHandler, XdmcpWakeupHandler,
+ (pointer) 0);
+ timeOutRtx = 0;
+ DisplayNumber = (CARD16) atoi(display);
+ get_xdmcp_sock();
+ send_packet();
+ }
+}
+
+void
+XdmcpReset (void)
+{
+ state = XDM_INIT_STATE;
+ if (state != XDM_OFF)
+ {
+ RegisterBlockAndWakeupHandlers (XdmcpBlockHandler, XdmcpWakeupHandler,
+ (pointer) 0);
+ timeOutRtx = 0;
+ send_packet();
+ }
+}
+
+/*
+ * Called whenever a new connection is created; notices the
+ * first connection and saves it to terminate the session
+ * when it is closed
+ */
+
+void
+XdmcpOpenDisplay(int sock)
+{
+ if (state != XDM_AWAIT_MANAGE_RESPONSE)
+ return;
+ state = XDM_RUN_SESSION;
+ sessionSocket = sock;
+}
+
+void
+XdmcpCloseDisplay(int sock)
+{
+ if ((state != XDM_RUN_SESSION && state != XDM_AWAIT_ALIVE_RESPONSE)
+ || sessionSocket != sock)
+ return;
+ state = XDM_INIT_STATE;
+ if (OneSession)
+ dispatchException |= DE_TERMINATE;
+ else
+ dispatchException |= DE_RESET;
+ isItTimeToYield = TRUE;
+}
+
+/*
+ * called before going to sleep, this routine
+ * may modify the timeout value about to be sent
+ * to select; in this way XDMCP can do appropriate things
+ * dynamically while starting up
+ */
+
+/*ARGSUSED*/
+static void
+XdmcpBlockHandler(
+ pointer data, /* unused */
+ struct timeval **wt,
+ pointer pReadmask)
+{
+ fd_set *LastSelectMask = (fd_set*)pReadmask;
+ CARD32 millisToGo;
+
+ if (state == XDM_OFF)
+ return;
+ FD_SET(xdmcpSocket, LastSelectMask);
+#if defined(IPv6) && defined(AF_INET6)
+ if (xdmcpSocket6 >= 0)
+ FD_SET(xdmcpSocket6, LastSelectMask);
+#endif
+ if (timeOutTime == 0)
+ return;
+ millisToGo = timeOutTime - GetTimeInMillis();
+ if ((int) millisToGo < 0)
+ millisToGo = 0;
+ AdjustWaitForDelay (wt, millisToGo);
+}
+
+/*
+ * called after select returns; this routine will
+ * recognise when XDMCP packets await and
+ * process them appropriately
+ */
+
+/*ARGSUSED*/
+static void
+XdmcpWakeupHandler(
+ pointer data, /* unused */
+ int i,
+ pointer pReadmask)
+{
+ fd_set* LastSelectMask = (fd_set*)pReadmask;
+ fd_set devicesReadable;
+
+ if (state == XDM_OFF)
+ return;
+ if (i > 0)
+ {
+ if (FD_ISSET(xdmcpSocket, LastSelectMask))
+ {
+ receive_packet(xdmcpSocket);
+ FD_CLR(xdmcpSocket, LastSelectMask);
+ }
+#if defined(IPv6) && defined(AF_INET6)
+ if (xdmcpSocket6 >= 0 && FD_ISSET(xdmcpSocket6, LastSelectMask))
+ {
+ receive_packet(xdmcpSocket6);
+ FD_CLR(xdmcpSocket6, LastSelectMask);
+ }
+#endif
+ XFD_ANDSET(&devicesReadable, LastSelectMask, &EnabledDevices);
+ if (XFD_ANYSET(&devicesReadable))
+ {
+ if (state == XDM_AWAIT_USER_INPUT)
+ restart();
+ else if (state == XDM_RUN_SESSION)
+ keepaliveDormancy = defaultKeepaliveDormancy;
+ }
+ if (XFD_ANYSET(&AllClients) && state == XDM_RUN_SESSION)
+ timeOutTime = GetTimeInMillis() + keepaliveDormancy * 1000;
+ }
+ else if (timeOutTime && (int) (GetTimeInMillis() - timeOutTime) >= 0)
+ {
+ if (state == XDM_RUN_SESSION)
+ {
+ state = XDM_KEEPALIVE;
+ send_packet();
+ }
+ else
+ timeout();
+ }
+}
+
+/*
+ * This routine should be called from the routine that drives the
+ * user's host menu when the user selects a host
+ */
+
+static void
+XdmcpSelectHost(
+ const struct sockaddr *host_sockaddr,
+ int host_len,
+ ARRAY8Ptr AuthenticationName)
+{
+ state = XDM_START_CONNECTION;
+ memmove(&req_sockaddr, host_sockaddr, host_len);
+ req_socklen = host_len;
+ XdmcpSetAuthentication (AuthenticationName);
+ send_packet();
+}
+
+/*
+ * !!! this routine should be replaced by a routine that adds
+ * the host to the user's host menu. the current version just
+ * selects the first host to respond with willing message.
+ */
+
+/*ARGSUSED*/
+static void
+XdmcpAddHost(
+ const struct sockaddr *from,
+ int fromlen,
+ ARRAY8Ptr AuthenticationName,
+ ARRAY8Ptr hostname,
+ ARRAY8Ptr status)
+{
+ XdmcpSelectHost(from, fromlen, AuthenticationName);
+}
+
+/*
+ * A message is queued on the socket; read it and
+ * do the appropriate thing
+ */
+
+static ARRAY8 UnwillingMessage = { (CARD8) 14, (CARD8 *) "Host unwilling" };
+
+static void
+receive_packet(int socketfd)
+{
+#if defined(IPv6) && defined(AF_INET6)
+ struct sockaddr_storage from;
+#else
+ struct sockaddr_in from;
+#endif
+ int fromlen = sizeof(from);
+ XdmcpHeader header;
+
+ /* read message off socket */
+ if (!XdmcpFill (socketfd, &buffer, (XdmcpNetaddr) &from, &fromlen))
+ return;
+
+ /* reset retransmission backoff */
+ timeOutRtx = 0;
+
+ if (!XdmcpReadHeader (&buffer, &header))
+ return;
+
+ if (header.version != XDM_PROTOCOL_VERSION)
+ return;
+
+ switch (header.opcode) {
+ case WILLING:
+ recv_willing_msg((struct sockaddr *) &from, fromlen, header.length);
+ break;
+ case UNWILLING:
+ XdmcpFatal("Manager unwilling", &UnwillingMessage);
+ break;
+ case ACCEPT:
+ recv_accept_msg(header.length);
+ break;
+ case DECLINE:
+ recv_decline_msg(header.length);
+ break;
+ case REFUSE:
+ recv_refuse_msg(header.length);
+ break;
+ case FAILED:
+ recv_failed_msg(header.length);
+ break;
+ case ALIVE:
+ recv_alive_msg(header.length);
+ break;
+ }
+}
+
+/*
+ * send the appropriate message given the current state
+ */
+
+static void
+send_packet(void)
+{
+ int rtx;
+ switch (state) {
+ case XDM_QUERY:
+ case XDM_BROADCAST:
+ case XDM_INDIRECT:
+#if defined(IPv6) && defined(AF_INET6)
+ case XDM_MULTICAST:
+#endif
+ send_query_msg();
+ break;
+ case XDM_START_CONNECTION:
+ send_request_msg();
+ break;
+ case XDM_MANAGE:
+ send_manage_msg();
+ break;
+ case XDM_KEEPALIVE:
+ send_keepalive_msg();
+ break;
+ default:
+ break;
+ }
+ rtx = (XDM_MIN_RTX << timeOutRtx);
+ if (rtx > XDM_MAX_RTX)
+ rtx = XDM_MAX_RTX;
+ timeOutTime = GetTimeInMillis() + rtx * 1000;
+}
+
+/*
+ * The session is declared dead for some reason; too many
+ * timeouts, or Keepalive failure.
+ */
+
+static void
+XdmcpDeadSession (const char *reason)
+{
+ ErrorF ("XDM: %s, declaring session dead\n", reason);
+ state = XDM_INIT_STATE;
+ isItTimeToYield = TRUE;
+ dispatchException |= DE_RESET;
+ timeOutTime = 0;
+ timeOutRtx = 0;
+ send_packet();
+}
+
+/*
+ * Timeout waiting for an XDMCP response.
+ */
+
+static void
+timeout(void)
+{
+ timeOutRtx++;
+ if (state == XDM_AWAIT_ALIVE_RESPONSE && timeOutRtx >= XDM_KA_RTX_LIMIT )
+ {
+ XdmcpDeadSession ("too many keepalive retransmissions");
+ return;
+ }
+ else if (timeOutRtx >= XDM_RTX_LIMIT)
+ {
+ /* Quit if "-once" specified, otherwise reset and try again. */
+ if (OneSession) {
+ dispatchException |= DE_TERMINATE;
+ ErrorF("XDM: too many retransmissions\n");
+ } else {
+ XdmcpDeadSession("too many retransmissions");
+ }
+ return;
+ }
+
+#if defined(IPv6) && defined(AF_INET6)
+ if (state == XDM_COLLECT_QUERY || state == XDM_COLLECT_INDIRECT_QUERY) {
+ /* Try next address */
+ for (mgrAddr = mgrAddr->ai_next; ; mgrAddr = mgrAddr->ai_next) {
+ if (mgrAddr == NULL) {
+ mgrAddr = mgrAddrFirst;
+ }
+ if (mgrAddr->ai_family == AF_INET
+ || mgrAddr->ai_family == AF_INET6)
+ break;
+ }
+#ifndef SIN6_LEN
+ ManagerAddressLen = mgrAddr->ai_addrlen;
+#endif
+ memcpy(&ManagerAddress, mgrAddr->ai_addr, mgrAddr->ai_addrlen);
+ }
+#endif
+
+ switch (state) {
+ case XDM_COLLECT_QUERY:
+ state = XDM_QUERY;
+ break;
+ case XDM_COLLECT_BROADCAST_QUERY:
+ state = XDM_BROADCAST;
+ break;
+#if defined(IPv6) && defined(AF_INET6)
+ case XDM_COLLECT_MULTICAST_QUERY:
+ state = XDM_MULTICAST;
+ break;
+#endif
+ case XDM_COLLECT_INDIRECT_QUERY:
+ state = XDM_INDIRECT;
+ break;
+ case XDM_AWAIT_REQUEST_RESPONSE:
+ state = XDM_START_CONNECTION;
+ break;
+ case XDM_AWAIT_MANAGE_RESPONSE:
+ state = XDM_MANAGE;
+ break;
+ case XDM_AWAIT_ALIVE_RESPONSE:
+ state = XDM_KEEPALIVE;
+ break;
+ default:
+ break;
+ }
+ send_packet();
+}
+
+static void
+restart(void)
+{
+ state = XDM_INIT_STATE;
+ timeOutRtx = 0;
+ send_packet();
+}
+
+static int
+XdmcpCheckAuthentication (ARRAY8Ptr Name, ARRAY8Ptr Data, int packet_type)
+{
+ return (XdmcpARRAY8Equal (Name, AuthenticationName) &&
+ (AuthenticationName->length == 0 ||
+ (*AuthenticationFuncs->Validator) (AuthenticationData, Data, packet_type)));
+}
+
+static int
+XdmcpAddAuthorization (ARRAY8Ptr name, ARRAY8Ptr data)
+{
+ AddAuthorFunc AddAuth;
+
+ if (AuthenticationFuncs && AuthenticationFuncs->AddAuth)
+ AddAuth = AuthenticationFuncs->AddAuth;
+ else
+ AddAuth = AddAuthorization;
+ return (*AddAuth) ((unsigned short)name->length,
+ (char *)name->data,
+ (unsigned short)data->length,
+ (char *)data->data);
+}
+
+/*
+ * from here to the end of this file are routines private
+ * to the state machine.
+ */
+
+static void
+get_xdmcp_sock(void)
+{
+#ifdef STREAMSCONN
+ struct netconfig *nconf;
+
+ if ((xdmcpSocket = t_open("/dev/udp", O_RDWR, 0)) < 0) {
+ XdmcpWarning("t_open() of /dev/udp failed");
+ return;
+ }
+
+ if( t_bind(xdmcpSocket,NULL,NULL) < 0 ) {
+ XdmcpWarning("UDP socket creation failed");
+ t_error("t_bind(xdmcpSocket) failed" );
+ t_close(xdmcpSocket);
+ return;
+ }
+
+ /*
+ * This part of the code looks contrived. It will actually fit in nicely
+ * when the CLTS part of Xtrans is implemented.
+ */
+
+ if( (nconf=getnetconfigent("udp")) == NULL ) {
+ XdmcpWarning("UDP socket creation failed: getnetconfigent()");
+ t_unbind(xdmcpSocket);
+ t_close(xdmcpSocket);
+ return;
+ }
+
+ if( netdir_options(nconf, ND_SET_BROADCAST, xdmcpSocket, NULL) ) {
+ XdmcpWarning("UDP set broadcast option failed: netdir_options()");
+ freenetconfigent(nconf);
+ t_unbind(xdmcpSocket);
+ t_close(xdmcpSocket);
+ return;
+ }
+
+ freenetconfigent(nconf);
+#else
+ int soopts = 1;
+
+#if defined(IPv6) && defined(AF_INET6)
+ if ((xdmcpSocket6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
+ XdmcpWarning("INET6 UDP socket creation failed");
+#endif
+ if ((xdmcpSocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+ XdmcpWarning("UDP socket creation failed");
+#ifdef SO_BROADCAST
+ else if (setsockopt(xdmcpSocket, SOL_SOCKET, SO_BROADCAST, (char *)&soopts,
+ sizeof(soopts)) < 0)
+ XdmcpWarning("UDP set broadcast socket-option failed");
+#endif /* SO_BROADCAST */
+ if (xdmcpSocket >= 0 && xdm_from != NULL) {
+ if (bind(xdmcpSocket, (struct sockaddr *)&FromAddress,
+ FromAddressLen) < 0) {
+ FatalError("Xserver: failed to bind to -from address: %s\n", xdm_from);
+ }
+ }
+#endif /* STREAMSCONN */
+}
+
+static void
+send_query_msg(void)
+{
+ XdmcpHeader header;
+ Bool broadcast = FALSE;
+#if defined(IPv6) && defined(AF_INET6)
+ Bool multicast = FALSE;
+#endif
+ int i;
+ int socketfd = xdmcpSocket;
+
+ header.version = XDM_PROTOCOL_VERSION;
+ switch(state){
+ case XDM_QUERY:
+ header.opcode = (CARD16) QUERY;
+ state = XDM_COLLECT_QUERY;
+ break;
+ case XDM_BROADCAST:
+ header.opcode = (CARD16) BROADCAST_QUERY;
+ state = XDM_COLLECT_BROADCAST_QUERY;
+ broadcast = TRUE;
+ break;
+#if defined(IPv6) && defined(AF_INET6)
+ case XDM_MULTICAST:
+ header.opcode = (CARD16) BROADCAST_QUERY;
+ state = XDM_COLLECT_MULTICAST_QUERY;
+ multicast = TRUE;
+ break;
+#endif
+ case XDM_INDIRECT:
+ header.opcode = (CARD16) INDIRECT_QUERY;
+ state = XDM_COLLECT_INDIRECT_QUERY;
+ break;
+ default:
+ break;
+ }
+ header.length = 1;
+ for (i = 0; i < AuthenticationNames.length; i++)
+ header.length += 2 + AuthenticationNames.data[i].length;
+
+ XdmcpWriteHeader (&buffer, &header);
+ XdmcpWriteARRAYofARRAY8 (&buffer, &AuthenticationNames);
+ if (broadcast)
+ {
+ int i;
+
+ for (i = 0; i < NumBroadcastAddresses; i++)
+ XdmcpFlush (xdmcpSocket, &buffer, (XdmcpNetaddr) &BroadcastAddresses[i],
+ sizeof (struct sockaddr_in));
+ }
+#if defined(IPv6) && defined(AF_INET6)
+ else if (multicast)
+ {
+ struct multicastinfo *mcl;
+ struct addrinfo *ai;
+
+ for (mcl = mcastlist; mcl != NULL; mcl = mcl->next) {
+ for (ai = mcl->ai ; ai != NULL; ai = ai->ai_next) {
+ if (ai->ai_family == AF_INET) {
+ unsigned char hopflag = (unsigned char) mcl->hops;
+ socketfd = xdmcpSocket;
+ setsockopt(socketfd, IPPROTO_IP, IP_MULTICAST_TTL,
+ &hopflag, sizeof(hopflag));
+ } else if (ai->ai_family == AF_INET6) {
+ int hopflag6 = mcl->hops;
+ socketfd = xdmcpSocket6;
+ setsockopt(socketfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
+ &hopflag6, sizeof(hopflag6));
+ } else {
+ continue;
+ }
+ XdmcpFlush (socketfd, &buffer,
+ (XdmcpNetaddr) ai->ai_addr, ai->ai_addrlen);
+ break;
+ }
+ }
+ }
+#endif
+ else
+ {
+#if defined(IPv6) && defined(AF_INET6)
+ if (SOCKADDR_FAMILY(ManagerAddress) == AF_INET6)
+ socketfd = xdmcpSocket6;
+#endif
+ XdmcpFlush (socketfd, &buffer, (XdmcpNetaddr) &ManagerAddress,
+ ManagerAddressLen);
+ }
+}
+
+static void
+recv_willing_msg(
+ struct sockaddr *from,
+ int fromlen,
+ unsigned length)
+{
+ ARRAY8 authenticationName;
+ ARRAY8 hostname;
+ ARRAY8 status;
+
+ authenticationName.data = 0;
+ hostname.data = 0;
+ status.data = 0;
+ if (XdmcpReadARRAY8 (&buffer, &authenticationName) &&
+ XdmcpReadARRAY8 (&buffer, &hostname) &&
+ XdmcpReadARRAY8 (&buffer, &status))
+ {
+ if (length == 6 + authenticationName.length +
+ hostname.length + status.length)
+ {
+ switch (state)
+ {
+ case XDM_COLLECT_QUERY:
+ XdmcpSelectHost(from, fromlen, &authenticationName);
+ break;
+ case XDM_COLLECT_BROADCAST_QUERY:
+#if defined(IPv6) && defined(AF_INET6)
+ case XDM_COLLECT_MULTICAST_QUERY:
+#endif
+ case XDM_COLLECT_INDIRECT_QUERY:
+ XdmcpAddHost(from, fromlen, &authenticationName, &hostname, &status);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ XdmcpDisposeARRAY8 (&authenticationName);
+ XdmcpDisposeARRAY8 (&hostname);
+ XdmcpDisposeARRAY8 (&status);
+}
+
+static void
+send_request_msg(void)
+{
+ XdmcpHeader header;
+ int length;
+ int i;
+ CARD16 XdmcpConnectionType;
+ ARRAY8 authenticationData;
+ int socketfd = xdmcpSocket;
+
+ switch (SOCKADDR_FAMILY(ManagerAddress))
+ {
+ case AF_INET: XdmcpConnectionType=FamilyInternet; break;
+#if defined(IPv6) && defined(AF_INET6)
+ case AF_INET6: XdmcpConnectionType=FamilyInternet6; break;
+#endif
+ default: XdmcpConnectionType=0xffff; break;
+ }
+
+ header.version = XDM_PROTOCOL_VERSION;
+ header.opcode = (CARD16) REQUEST;
+
+ length = 2; /* display number */
+ length += 1 + 2 * ConnectionTypes.length; /* connection types */
+ length += 1; /* connection addresses */
+ for (i = 0; i < ConnectionAddresses.length; i++)
+ length += 2 + ConnectionAddresses.data[i].length;
+ authenticationData.length = 0;
+ authenticationData.data = 0;
+ if (AuthenticationFuncs)
+ {
+ (*AuthenticationFuncs->Generator) (AuthenticationData,
+ &authenticationData,
+ REQUEST);
+ }
+ length += 2 + AuthenticationName->length; /* authentication name */
+ length += 2 + authenticationData.length; /* authentication data */
+ length += 1; /* authorization names */
+ for (i = 0; i < AuthorizationNames.length; i++)
+ length += 2 + AuthorizationNames.data[i].length;
+ length += 2 + ManufacturerDisplayID.length; /* display ID */
+ header.length = length;
+
+ if (!XdmcpWriteHeader (&buffer, &header))
+ {
+ XdmcpDisposeARRAY8 (&authenticationData);
+ return;
+ }
+ XdmcpWriteCARD16 (&buffer, DisplayNumber);
+ XdmcpWriteCARD8 (&buffer, ConnectionTypes.length);
+
+ /* The connection array is send reordered, so that connections of */
+ /* the same address type as the XDMCP manager connection are send */
+ /* first. This works around a bug in xdm. mario@klebsch.de */
+ for (i = 0; i < (int)ConnectionTypes.length; i++)
+ if (ConnectionTypes.data[i]==XdmcpConnectionType)
+ XdmcpWriteCARD16 (&buffer, ConnectionTypes.data[i]);
+ for (i = 0; i < (int)ConnectionTypes.length; i++)
+ if (ConnectionTypes.data[i]!=XdmcpConnectionType)
+ XdmcpWriteCARD16 (&buffer, ConnectionTypes.data[i]);
+
+ XdmcpWriteCARD8 (&buffer, ConnectionAddresses.length);
+ for (i = 0; i < (int)ConnectionAddresses.length; i++)
+ if ( (i<ConnectionTypes.length) &&
+ (ConnectionTypes.data[i]==XdmcpConnectionType) )
+ XdmcpWriteARRAY8 (&buffer, &ConnectionAddresses.data[i]);
+ for (i = 0; i < (int)ConnectionAddresses.length; i++)
+ if ( (i>=ConnectionTypes.length) ||
+ (ConnectionTypes.data[i]!=XdmcpConnectionType) )
+ XdmcpWriteARRAY8 (&buffer, &ConnectionAddresses.data[i]);
+
+ XdmcpWriteARRAY8 (&buffer, AuthenticationName);
+ XdmcpWriteARRAY8 (&buffer, &authenticationData);
+ XdmcpDisposeARRAY8 (&authenticationData);
+ XdmcpWriteARRAYofARRAY8 (&buffer, &AuthorizationNames);
+ XdmcpWriteARRAY8 (&buffer, &ManufacturerDisplayID);
+#if defined(IPv6) && defined(AF_INET6)
+ if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6)
+ socketfd = xdmcpSocket6;
+#endif
+ if (XdmcpFlush (socketfd, &buffer,
+ (XdmcpNetaddr) &req_sockaddr, req_socklen))
+ state = XDM_AWAIT_REQUEST_RESPONSE;
+}
+
+static void
+recv_accept_msg(unsigned length)
+{
+ CARD32 AcceptSessionID;
+ ARRAY8 AcceptAuthenticationName, AcceptAuthenticationData;
+ ARRAY8 AcceptAuthorizationName, AcceptAuthorizationData;
+
+ if (state != XDM_AWAIT_REQUEST_RESPONSE)
+ return;
+ AcceptAuthenticationName.data = 0;
+ AcceptAuthenticationData.data = 0;
+ AcceptAuthorizationName.data = 0;
+ AcceptAuthorizationData.data = 0;
+ if (XdmcpReadCARD32 (&buffer, &AcceptSessionID) &&
+ XdmcpReadARRAY8 (&buffer, &AcceptAuthenticationName) &&
+ XdmcpReadARRAY8 (&buffer, &AcceptAuthenticationData) &&
+ XdmcpReadARRAY8 (&buffer, &AcceptAuthorizationName) &&
+ XdmcpReadARRAY8 (&buffer, &AcceptAuthorizationData))
+ {
+ if (length == 12 + AcceptAuthenticationName.length +
+ AcceptAuthenticationData.length +
+ AcceptAuthorizationName.length +
+ AcceptAuthorizationData.length)
+ {
+ if (!XdmcpCheckAuthentication (&AcceptAuthenticationName,
+ &AcceptAuthenticationData, ACCEPT))
+ {
+ XdmcpFatal ("Authentication Failure", &AcceptAuthenticationName);
+ }
+ /* permit access control manipulations from this host */
+ AugmentSelf (&req_sockaddr, req_socklen);
+ /* if the authorization specified in the packet fails
+ * to be acceptable, enable the local addresses
+ */
+ if (!XdmcpAddAuthorization (&AcceptAuthorizationName,
+ &AcceptAuthorizationData))
+ {
+ AddLocalHosts ();
+ }
+ SessionID = AcceptSessionID;
+ state = XDM_MANAGE;
+ send_packet();
+ }
+ }
+ XdmcpDisposeARRAY8 (&AcceptAuthenticationName);
+ XdmcpDisposeARRAY8 (&AcceptAuthenticationData);
+ XdmcpDisposeARRAY8 (&AcceptAuthorizationName);
+ XdmcpDisposeARRAY8 (&AcceptAuthorizationData);
+}
+
+static void
+recv_decline_msg(unsigned length)
+{
+ ARRAY8 status, DeclineAuthenticationName, DeclineAuthenticationData;
+
+ status.data = 0;
+ DeclineAuthenticationName.data = 0;
+ DeclineAuthenticationData.data = 0;
+ if (XdmcpReadARRAY8 (&buffer, &status) &&
+ XdmcpReadARRAY8 (&buffer, &DeclineAuthenticationName) &&
+ XdmcpReadARRAY8 (&buffer, &DeclineAuthenticationData))
+ {
+ if (length == 6 + status.length +
+ DeclineAuthenticationName.length +
+ DeclineAuthenticationData.length &&
+ XdmcpCheckAuthentication (&DeclineAuthenticationName,
+ &DeclineAuthenticationData, DECLINE))
+ {
+ XdmcpFatal ("Session declined", &status);
+ }
+ }
+ XdmcpDisposeARRAY8 (&status);
+ XdmcpDisposeARRAY8 (&DeclineAuthenticationName);
+ XdmcpDisposeARRAY8 (&DeclineAuthenticationData);
+}
+
+static void
+send_manage_msg(void)
+{
+ XdmcpHeader header;
+ int socketfd = xdmcpSocket;
+
+ header.version = XDM_PROTOCOL_VERSION;
+ header.opcode = (CARD16) MANAGE;
+ header.length = 8 + DisplayClass.length;
+
+ if (!XdmcpWriteHeader (&buffer, &header))
+ return;
+ XdmcpWriteCARD32 (&buffer, SessionID);
+ XdmcpWriteCARD16 (&buffer, DisplayNumber);
+ XdmcpWriteARRAY8 (&buffer, &DisplayClass);
+ state = XDM_AWAIT_MANAGE_RESPONSE;
+#if defined(IPv6) && defined(AF_INET6)
+ if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6)
+ socketfd = xdmcpSocket6;
+#endif
+ XdmcpFlush (socketfd, &buffer, (XdmcpNetaddr) &req_sockaddr, req_socklen);
+}
+
+static void
+recv_refuse_msg(unsigned length)
+{
+ CARD32 RefusedSessionID;
+
+ if (state != XDM_AWAIT_MANAGE_RESPONSE)
+ return;
+ if (length != 4)
+ return;
+ if (XdmcpReadCARD32 (&buffer, &RefusedSessionID))
+ {
+ if (RefusedSessionID == SessionID)
+ {
+ state = XDM_START_CONNECTION;
+ send_packet();
+ }
+ }
+}
+
+static void
+recv_failed_msg(unsigned length)
+{
+ CARD32 FailedSessionID;
+ ARRAY8 status;
+
+ if (state != XDM_AWAIT_MANAGE_RESPONSE)
+ return;
+ status.data = 0;
+ if (XdmcpReadCARD32 (&buffer, &FailedSessionID) &&
+ XdmcpReadARRAY8 (&buffer, &status))
+ {
+ if (length == 6 + status.length &&
+ SessionID == FailedSessionID)
+ {
+ XdmcpFatal ("Session failed", &status);
+ }
+ }
+ XdmcpDisposeARRAY8 (&status);
+}
+
+static void
+send_keepalive_msg(void)
+{
+ XdmcpHeader header;
+ int socketfd = xdmcpSocket;
+
+ header.version = XDM_PROTOCOL_VERSION;
+ header.opcode = (CARD16) KEEPALIVE;
+ header.length = 6;
+
+ XdmcpWriteHeader (&buffer, &header);
+ XdmcpWriteCARD16 (&buffer, DisplayNumber);
+ XdmcpWriteCARD32 (&buffer, SessionID);
+
+ state = XDM_AWAIT_ALIVE_RESPONSE;
+#if defined(IPv6) && defined(AF_INET6)
+ if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6)
+ socketfd = xdmcpSocket6;
+#endif
+ XdmcpFlush (socketfd, &buffer, (XdmcpNetaddr) &req_sockaddr, req_socklen);
+}
+
+static void
+recv_alive_msg (unsigned length)
+{
+ CARD8 SessionRunning;
+ CARD32 AliveSessionID;
+
+ if (state != XDM_AWAIT_ALIVE_RESPONSE)
+ return;
+ if (length != 5)
+ return;
+ if (XdmcpReadCARD8 (&buffer, &SessionRunning) &&
+ XdmcpReadCARD32 (&buffer, &AliveSessionID))
+ {
+ if (SessionRunning && AliveSessionID == SessionID)
+ {
+ /* backoff dormancy period */
+ state = XDM_RUN_SESSION;
+ if ((GetTimeInMillis() - lastDeviceEventTime.milliseconds) >
+ keepaliveDormancy * 1000)
+ {
+ keepaliveDormancy <<= 1;
+ if (keepaliveDormancy > XDM_MAX_DORMANCY)
+ keepaliveDormancy = XDM_MAX_DORMANCY;
+ }
+ timeOutTime = GetTimeInMillis() + keepaliveDormancy * 1000;
+ }
+ else
+ {
+ XdmcpDeadSession ("Alive response indicates session dead");
+ }
+ }
+}
+
+static void
+XdmcpFatal (
+ const char *type,
+ ARRAY8Ptr status)
+{
+ FatalError ("XDMCP fatal error: %s %*.*s\n", type,
+ status->length, status->length, status->data);
+}
+
+static void
+XdmcpWarning(const char *str)
+{
+ ErrorF("XDMCP warning: %s\n", str);
+}
+
+static void
+get_addr_by_name(
+ const char *argtype,
+ const char *namestr,
+ int port,
+ int socktype,
+ SOCKADDR_TYPE *addr,
+ SOCKLEN_TYPE *addrlen
+#if defined(IPv6) && defined(AF_INET6)
+ ,
+ struct addrinfo **aip,
+ struct addrinfo **aifirstp
+#endif
+ )
+{
+#if defined(IPv6) && defined(AF_INET6)
+ struct addrinfo *ai;
+ struct addrinfo hints;
+ char portstr[6];
+ char *pport = portstr;
+ int gaierr;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_socktype = socktype;
+
+ if (port == 0) {
+ pport = NULL;
+ } else if (port > 0 && port < 65535) {
+ snprintf(portstr, sizeof(portstr), "%d", port);
+ } else {
+ FatalError("Xserver: port out of range: %d\n", port);
+ }
+
+ if (*aifirstp != NULL) {
+ freeaddrinfo(*aifirstp);
+ *aifirstp = NULL;
+ }
+
+ if ((gaierr = getaddrinfo(namestr, pport, &hints, aifirstp)) == 0) {
+ for (ai = *aifirstp; ai != NULL; ai = ai->ai_next) {
+ if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6)
+ break;
+ }
+ if ((ai == NULL) || (ai->ai_addrlen > sizeof(SOCKADDR_TYPE))) {
+ FatalError ("Xserver: %s host %s not on supported network type\n",
+ argtype, namestr);
+ } else {
+ *aip = ai;
+ *addrlen = ai->ai_addrlen;
+ memcpy(addr, ai->ai_addr, ai->ai_addrlen);
+ }
+ } else {
+ FatalError("Xserver: %s: %s %s\n", gai_strerror(gaierr), argtype, namestr);
+ }
+#else
+ struct hostent *hep;
+#ifdef XTHREADS_NEEDS_BYNAMEPARAMS
+ _Xgethostbynameparams hparams;
+#endif
+#if defined(WIN32) && defined(TCPCONN)
+ _XSERVTransWSAStartup();
+#endif
+ if (!(hep = _XGethostbyname(namestr, hparams)))
+ {
+ FatalError("Xserver: %s unknown host: %s\n", argtype, namestr);
+ }
+ if (hep->h_length == sizeof (struct in_addr))
+ {
+ memmove(&addr->sin_addr, hep->h_addr, hep->h_length);
+ *addrlen = sizeof(struct sockaddr_in);
+ addr->sin_family = AF_INET;
+ addr->sin_port = htons (port);
+ }
+ else
+ {
+ FatalError("Xserver: %s host on strange network %s\n", argtype, namestr);
+ }
+#endif
+}
+
+static void
+get_manager_by_name(
+ int argc,
+ char **argv,
+ int i)
+{
+
+ if ((i + 1) == argc)
+ {
+ FatalError("Xserver: missing %s host name in command line\n", argv[i]);
+ }
+
+ get_addr_by_name(argv[i], argv[i+1], xdm_udp_port, SOCK_DGRAM,
+ &ManagerAddress, &ManagerAddressLen
+#if defined(IPv6) && defined(AF_INET6)
+ , &mgrAddr, &mgrAddrFirst
+#endif
+ );
+}
+
+
+static void
+get_fromaddr_by_name(
+ int argc,
+ char **argv,
+ int i)
+{
+#if defined(IPv6) && defined(AF_INET6)
+ struct addrinfo *ai = NULL;
+ struct addrinfo *aifirst = NULL;
+#endif
+ if (i == argc)
+ {
+ FatalError("Xserver: missing -from host name in command line\n");
+ }
+ get_addr_by_name("-from", argv[i], 0, 0, &FromAddress, &FromAddressLen
+#if defined(IPv6) && defined(AF_INET6)
+ , &ai, &aifirst
+#endif
+ );
+#if defined(IPv6) && defined(AF_INET6)
+ if (aifirst != NULL)
+ freeaddrinfo(aifirst);
+#endif
+ xdm_from = argv[i];
+}
+
+
+#if defined(IPv6) && defined(AF_INET6)
+static int
+get_mcast_options(int argc, char **argv, int i)
+{
+ char *address = XDM_DEFAULT_MCAST_ADDR6;
+ int hopcount = 1;
+ struct addrinfo hints;
+ char portstr[6];
+ int gaierr;
+ struct addrinfo *ai, *firstai;
+
+ if ((i < argc) && (argv[i][0] != '-') && (argv[i][0] != '+')) {
+ address = argv[i++];
+ if ((i < argc) && (argv[i][0] != '-') && (argv[i][0] != '+')) {
+ hopcount = strtol(argv[i++], NULL, 10);
+ if ((hopcount < 1) || (hopcount > 255)) {
+ FatalError("Xserver: multicast hop count out of range: %d\n",
+ hopcount);
+ }
+ }
+ }
+
+ if (xdm_udp_port > 0 && xdm_udp_port < 65535) {
+ snprintf(portstr, sizeof(portstr), "%d", xdm_udp_port);
+ } else {
+ FatalError("Xserver: port out of range: %d\n", xdm_udp_port);
+ }
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_socktype = SOCK_DGRAM;
+
+ if ((gaierr = getaddrinfo(address, portstr, &hints, &firstai)) == 0) {
+ for (ai = firstai; ai != NULL; ai = ai->ai_next) {
+ if (((ai->ai_family == AF_INET) &&
+ IN_MULTICAST(((struct sockaddr_in *) ai->ai_addr)
+ ->sin_addr.s_addr))
+ || ((ai->ai_family == AF_INET6) &&
+ IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *) ai->ai_addr)
+ ->sin6_addr)))
+ break;
+ }
+ if (ai == NULL) {
+ FatalError ("Xserver: address not supported multicast type %s\n",
+ address);
+ } else {
+ struct multicastinfo *mcastinfo, *mcl;
+
+ mcastinfo = malloc(sizeof(struct multicastinfo));
+ mcastinfo->next = NULL;
+ mcastinfo->ai = firstai;
+ mcastinfo->hops = hopcount;
+
+ if (mcastlist == NULL) {
+ mcastlist = mcastinfo;
+ } else {
+ for (mcl = mcastlist; mcl->next != NULL; mcl = mcl->next) {
+ /* Do nothing - just find end of list */
+ }
+ mcl->next = mcastinfo;
+ }
+ }
+ } else {
+ FatalError("Xserver: %s: %s\n", gai_strerror(gaierr), address);
+ }
+ return i;
+}
+#endif
+
+#else
+static int xdmcp_non_empty; /* avoid complaint by ranlib */
+#endif /* XDMCP */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 21:39:40 +0000