xserver git update 9/5/2010

1 files changed, 1661 insertions, 1661 deletions

diff --git a/xorg-server/os/xdmcp.c b/xorg-server/os/xdmcp.c
index c1d650d46..436ec726e 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(
-    struct sockaddr    *from,
-    int			fromlen,
-    ARRAY8Ptr		AuthenticationName,
-    ARRAY8Ptr		hostname,
-    ARRAY8Ptr		status);
-
-static void XdmcpSelectHost(
-    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(
-    char * /*type*/,
-    ARRAY8Ptr /*status*/);
- 
-static void XdmcpWarning(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 (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 (struct sockaddr_in *addr)
-{
-    struct sockaddr_in	*bcast;
-    if (NumBroadcastAddresses >= MAX_BROADCAST)
-	return;
-    bcast = &BroadcastAddresses[NumBroadcastAddresses++];
-    bzero (bcast, 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 (
-    char    *name,
-    int	    namelen,
-    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 = xalloc ((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;
-    xfree (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 (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,
-    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 = xalloc (addrlen * sizeof (CARD8));
-    if (!newAddress)
-	return;
-    if (!XdmcpReallocARRAY16 (&ConnectionTypes, ConnectionTypes.length + 1))
-    {
-	xfree (newAddress);
-	return;
-    }
-    if (!XdmcpReallocARRAYofARRAY8 (&ConnectionAddresses,
-				    ConnectionAddresses.length +  1))
-    {
-	xfree (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 (char *name, int namelen)
-{
-    ARRAY8  authName;
-    int	    i;
-
-    authName.data = xalloc (namelen * sizeof (CARD8));
-    if (!authName.data)
-	return;
-    if (!XdmcpReallocARRAYofARRAY8 (&AuthorizationNames, AuthorizationNames.length +1))
-    {
-	xfree (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 (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(
-    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(
-    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 (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 (
-    char	*type,
-    ARRAY8Ptr	status)
-{
-    FatalError ("XDMCP fatal error: %s %*.*s\n", type,
-	   status->length, status->length, status->data);
-}
-
-static  void
-XdmcpWarning(char *str)
-{
-    ErrorF("XDMCP warning: %s\n", str);
-}
-
-static void
-get_addr_by_name(
-    char *	argtype,
-    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;
-
-    bzero(&hints, 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) || defined(DNETCONN))
-    _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);
-    }
-    bzero(&hints, 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++];

+    bzero (bcast, 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 = xalloc ((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;

+    xfree (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 = xalloc (addrlen * sizeof (CARD8));

+    if (!newAddress)

+	return;

+    if (!XdmcpReallocARRAY16 (&ConnectionTypes, ConnectionTypes.length + 1))

+    {

+	xfree (newAddress);

+	return;

+    }

+    if (!XdmcpReallocARRAYofARRAY8 (&ConnectionAddresses,

+				    ConnectionAddresses.length +  1))

+    {

+	xfree (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 = xalloc (namelen * sizeof (CARD8));

+    if (!authName.data)

+	return;

+    if (!XdmcpReallocARRAYofARRAY8 (&AuthorizationNames, AuthorizationNames.length +1))

+    {

+	xfree (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;

+

+    bzero(&hints, 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) || defined(DNETCONN))

+    _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);

+    }

+    bzero(&hints, 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 */