Logo Search packages:      
Sourcecode: xdm version File versions  Download package

xdmcp.c

/* $XdotOrg: app/xdm/xdmcp.c,v 1.5 2005/07/05 18:52:33 alanc Exp $ */
/* $Xorg: xdmcp.c,v 1.4 2001/02/09 02:05:41 xorgcvs Exp $ */
/*

Copyright 1988, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from The Open Group.

*/
/* $XFree86: xc/programs/xdm/xdmcp.c,v 3.25 2003/11/23 22:36:03 herrb Exp $ */

/*
 * xdm - display manager daemon
 * Author:  Keith Packard, MIT X Consortium
 *
 * xdmcp.c - Support for XDMCP
 */

# include "dm.h"
# include "dm_auth.h"
# include "dm_error.h"

#ifdef XDMCP

# include   <X11/X.h>
# include   <X11/Xfuncs.h>
# include   <sys/types.h>
# include   <ctype.h>

# include   "dm_socket.h"

#ifndef X_NO_SYS_UN
#ifndef Lynx
#include    <sys/un.h>
#else
#include    <un.h>
#endif
#endif
#include    <netdb.h>
#include    <arpa/inet.h>

#include <time.h>
#define Time_t time_t

#define getString(name,len)   ((name = malloc (len + 1)) ? 1 : 0)

/*
 * misc externs
 */
extern volatile int Rescan;
extern int sourceAddress, ChildReady;

/*
 * Forward reference
 */
static void broadcast_respond (struct sockaddr *from, int fromlen, int length, int fd);
static void forward_respond (struct sockaddr *from, int fromlen, int length, int fd);
static void manage (struct sockaddr *from, int fromlen, int length, int fd);
static void query_respond (struct sockaddr *from, int fromlen, int length, int fd);
static void request_respond (struct sockaddr *from, int fromlen, int length, int fd);
static void send_accept (struct sockaddr *to, int tolen, CARD32 sessionID, ARRAY8Ptr authenticationName, ARRAY8Ptr authenticationData, ARRAY8Ptr authorizationName, ARRAY8Ptr authorizationData, int fd);
static void send_alive (struct sockaddr *from, int fromlen, int length, int fd);
static void send_decline (struct sockaddr *to, int tolen, ARRAY8Ptr authenticationName, ARRAY8Ptr authenticationData, ARRAY8Ptr status, int fd);
static void send_failed (struct sockaddr *from, int fromlen, char *name, CARD32 sessionID, char *reason, int fd);
static void send_refuse (struct sockaddr *from, int fromlen, CARD32 sessionID, int fd);
static void send_unwilling (struct sockaddr *from, int fromlen, ARRAY8Ptr authenticationName, ARRAY8Ptr status, int fd);
static void send_willing (struct sockaddr *from, int fromlen, ARRAY8Ptr authenticationName, ARRAY8Ptr status, int fd);

#ifdef STREAMSCONN
int   xdmcpFd = -1;
#endif
int   chooserFd = -1;
#if defined(IPv6) && defined(AF_INET6)
int   chooserFd6 = -1;
#endif

FD_TYPE     WellKnownSocketsMask;
int   WellKnownSocketsMax;

#define pS(s)     ((s) ? ((char *) (s)) : "empty string")

void
DestroyWellKnownSockets (void)
{
#ifdef STREAMSCONN
    if (xdmcpFd != -1)
    {
      close (xdmcpFd);
      FD_CLR(xdmcpFd, &WellKnownSocketsMask);
      xdmcpFd = -1;
    }
#endif
    if (chooserFd != -1)
    {
      close (chooserFd);
      FD_CLR(chooserFd, &WellKnownSocketsMask);
      chooserFd = -1;
    }
#if defined(IPv6) && defined(AF_INET6)
    if (chooserFd6 != -1)
    {
      close (chooserFd6);
      FD_CLR(chooserFd6, &WellKnownSocketsMask);
      chooserFd6 = -1;
    }
#endif
    CloseListenSockets();
}

static int
FD_ANYSET(fd_set *fds)
{
    int i;
    char *mask = (char *) fds;

    for (i = 0 ; i < sizeof(fds); i++) {
      if (mask[i])
          return TRUE;
    }
    return FALSE;
}

int
AnyWellKnownSockets (void)
{
    return 
#ifdef STREAMS_CONN
      xdmcpFd != -1 ||
#endif
#if defined(IPv6) && defined(AF_INET6)
      chooserFd6 != -1 ||
#endif
      chooserFd != -1 || FD_ANYSET(&WellKnownSocketsMask);
}

static XdmcpBuffer      buffer;

/*ARGSUSED*/
static void
sendForward (
    CARD16  connectionType,
    ARRAY8Ptr     address,
    char    *closure)
{
#ifdef AF_INET
    struct sockaddr_in      in_addr;
#endif
#if defined(IPv6) && defined(AF_INET6)
    struct sockaddr_in6     in6_addr;
#endif
#ifdef AF_DECnet
#endif
    struct sockaddr         *addr;
    int                     addrlen;

    switch (connectionType)
    {
#ifdef AF_INET
    case FamilyInternet:
      addr = (struct sockaddr *) &in_addr;
      bzero ((char *) &in_addr, sizeof (in_addr));
#ifdef BSD44SOCKETS
      in_addr.sin_len = sizeof(in_addr);
#endif
      in_addr.sin_family = AF_INET;
      in_addr.sin_port = htons ((short) XDM_UDP_PORT);
      if (address->length != 4)
          return;
      memmove( (char *) &in_addr.sin_addr, address->data, address->length);
      addrlen = sizeof (struct sockaddr_in);
      break;
#endif
#if defined(IPv6) && defined(AF_INET6)
    case FamilyInternet6:
      addr = (struct sockaddr *) &in6_addr;
      bzero ((char *) &in6_addr, sizeof (in6_addr));
#ifdef SIN6_LEN
      in6_addr.sin6_len = sizeof(in6_addr);
#endif
      in6_addr.sin6_family = AF_INET6;
      in6_addr.sin6_port = htons ((short) XDM_UDP_PORT);
      if (address->length != 16)
          return;
      memmove( (char *) &in6_addr.sin6_addr, address->data, address->length);
      addrlen = sizeof (struct sockaddr_in6);
      break;
#endif
#ifdef AF_DECnet
    case FamilyDECnet:
#endif
    default:
      return;
    }
    XdmcpFlush (*((int *) closure), &buffer, (XdmcpNetaddr) addr, addrlen);
    return;
}

static void
ClientAddress (
    struct sockaddr *from,
    ARRAY8Ptr         addr,   /* return */
    ARRAY8Ptr         port,   /* return */
    CARD16      *type)  /* return */
{
    int length, family;
    char *data;

    data = NetaddrPort((XdmcpNetaddr) from, &length);
    XdmcpAllocARRAY8 (port, length);
    memmove( port->data, data, length);
    port->length = length;

    family = ConvertAddr((XdmcpNetaddr) from, &length, &data);
    XdmcpAllocARRAY8 (addr, length);
    memmove( addr->data, data, length);
    addr->length = length;

    *type = family;
}

static void
all_query_respond (
    struct sockaddr     *from,
    int                 fromlen,
    ARRAYofARRAY8Ptr    authenticationNames,
    xdmOpCode           type,
    int                 fd)
{
    ARRAY8Ptr     authenticationName;
    ARRAY8  status;
    ARRAY8  addr;
    CARD16  connectionType;
    int           family;
    int           length;
    const char    *addrstring;
#if defined(IPv6) && defined(AF_INET6) 
    char    addrbuf[INET6_ADDRSTRLEN] = "";
#endif

    family = ConvertAddr((XdmcpNetaddr) from, &length, (char **)&(addr.data));
    addr.length = length;     /* convert int to short */
    if (debugLevel > 0) {
#if defined(IPv6) && defined(AF_INET6) 
      void *ipaddr;
      int af_type;
      if (family == FamilyInternet6) {
          ipaddr = & ((struct sockaddr_in6 *) from)->sin6_addr;
          af_type = AF_INET6;
      } else {
          ipaddr = & ((struct sockaddr_in *) from)->sin_addr;
          af_type = AF_INET;
      }
      addrstring = inet_ntop(af_type, ipaddr, addrbuf, sizeof(addrbuf));
#else
      addrstring = inet_ntoa(((struct sockaddr_in *)from)->sin_addr);
#endif
      Debug("all_query_respond: conntype=%d, addr=%s, len=%d\n",
          family, addrstring, addr.length);
    }
    if (family < 0)
      return;
    connectionType = family;

    if (type == INDIRECT_QUERY)
      RememberIndirectClient (&addr, connectionType);
    else
      ForgetIndirectClient (&addr, connectionType);

    authenticationName = ChooseAuthentication (authenticationNames);
    if (Willing (&addr, connectionType, authenticationName, &status, type))
      send_willing (from, fromlen, authenticationName, &status, fd);
    else
      if (type == QUERY)
          send_unwilling (from, fromlen, authenticationName, &status, fd);
    XdmcpDisposeARRAY8 (&status);
}

static void
indirect_respond (
    struct sockaddr *from,
    int               fromlen,
    int               length,
    int               fd)
{
    ARRAYofARRAY8   queryAuthenticationNames;
    ARRAY8      clientAddress;
    ARRAY8      clientPort;
    CARD16      connectionType;
    int               expectedLen;
    int               i;
    XdmcpHeader       header;
    int               localHostAsWell;
    
    Debug ("Indirect respond %d\n", length);
    if (!XdmcpReadARRAYofARRAY8 (&buffer, &queryAuthenticationNames))
      return;
    expectedLen = 1;
    for (i = 0; i < (int)queryAuthenticationNames.length; i++)
      expectedLen += 2 + queryAuthenticationNames.data[i].length;
    if (length == expectedLen)
    {
      ClientAddress (from, &clientAddress, &clientPort, &connectionType);
      /*
       * set up the forward query packet
       */
      header.version = XDM_PROTOCOL_VERSION;
      header.opcode = (CARD16) FORWARD_QUERY;
      header.length = 0;
      header.length += 2 + clientAddress.length;
      header.length += 2 + clientPort.length;
      header.length += 1;
      for (i = 0; i < (int)queryAuthenticationNames.length; i++)
          header.length += 2 + queryAuthenticationNames.data[i].length;
      XdmcpWriteHeader (&buffer, &header);
      XdmcpWriteARRAY8 (&buffer, &clientAddress);
      XdmcpWriteARRAY8 (&buffer, &clientPort);
      XdmcpWriteARRAYofARRAY8 (&buffer, &queryAuthenticationNames);

      localHostAsWell = ForEachMatchingIndirectHost (&clientAddress, connectionType, sendForward, (char *) &fd);
      
      XdmcpDisposeARRAY8 (&clientAddress);
      XdmcpDisposeARRAY8 (&clientPort);
      if (localHostAsWell)
          all_query_respond (from, fromlen, &queryAuthenticationNames,
                     INDIRECT_QUERY, fd);
    }
    else
    {
      Debug ("Indirect length error got %d expect %d\n", length, expectedLen);
    }
    XdmcpDisposeARRAYofARRAY8 (&queryAuthenticationNames);
}

void
ProcessRequestSocket (int fd)
{
    XdmcpHeader         header;
#if defined(IPv6) && defined(AF_INET6)
    struct sockaddr_storage   addr;
#else
    struct sockaddr     addr;
#endif
    int                 addrlen = sizeof addr;

    Debug ("ProcessRequestSocket\n");
    bzero ((char *) &addr, sizeof (addr));
    if (!XdmcpFill (fd, &buffer, (XdmcpNetaddr) &addr, &addrlen)) {
      Debug ("XdmcpFill failed\n");
      return;
    }
    if (!XdmcpReadHeader (&buffer, &header)) {
      Debug ("XdmcpReadHeader failed\n");
      return;
    }
    if (header.version != XDM_PROTOCOL_VERSION) {
      Debug ("XDMCP header version read was %d, expected %d\n",
             header.version, XDM_PROTOCOL_VERSION);
      return;
    }
    Debug ("header: %d %d %d\n", header.version, header.opcode, header.length);
    switch (header.opcode)
    {
    case BROADCAST_QUERY:
      broadcast_respond ((struct sockaddr *) &addr, addrlen, header.length, fd);
      break;
    case QUERY:
      query_respond ((struct sockaddr *) &addr, addrlen, header.length, fd);
      break;
    case INDIRECT_QUERY:
      indirect_respond ((struct sockaddr *) &addr, addrlen, header.length, fd);
      break;
    case FORWARD_QUERY:
      forward_respond ((struct sockaddr *) &addr, addrlen, header.length, fd);
      break;
    case REQUEST:
      request_respond ((struct sockaddr *) &addr, addrlen, header.length, fd);
      break;
    case MANAGE:
      manage ((struct sockaddr *) &addr, addrlen, header.length, fd);
      break;
    case KEEPALIVE:
      send_alive ((struct sockaddr *) &addr, addrlen, header.length, fd);
      break;
    }
}

void
WaitForSomething (void)
{
    FD_TYPE reads;
    int     nready;

    Debug ("WaitForSomething\n");
    if (AnyWellKnownSockets () && !ChildReady) {
      reads = WellKnownSocketsMask;
      nready = select (WellKnownSocketsMax + 1, &reads, 0, 0, 0);
      Debug ("select returns %d.  Rescan: %d  ChildReady: %d\n",
            nready, Rescan, ChildReady);
      if (nready > 0)
      {
#ifdef STREAMSCONN
          if (xdmcpFd >= 0 && FD_ISSET (xdmcpFd, &reads))
            ProcessRequestSocket (xdmcpFd);
#endif
          if (chooserFd >= 0 && FD_ISSET (chooserFd, &reads))
          {
#ifdef ISC
              if (!ChildReady) {
                 WaitForSomething ();
                } else
#endif
            ProcessChooserSocket (chooserFd);
            FD_CLR(chooserFd, &reads);
          }
#if defined(IPv6) && defined(AF_INET6)
          if (chooserFd6 >= 0 && FD_ISSET (chooserFd6, &reads))
          {
#ifdef ISC
              if (!ChildReady) {
                 WaitForSomething ();
                } else
#endif
            ProcessChooserSocket (chooserFd6);
            FD_CLR(chooserFd6, &reads);
          }
#endif 
          ProcessListenSockets(&reads);
      }
      if (ChildReady)
      {
          WaitForChild ();
      }
    } else
      WaitForChild ();
}

/*
 * respond to a request on the UDP socket.
 */

static ARRAY8     Hostname;

void
registerHostname (
    char    *name,
    int         namelen)
{
    int     i;

    if (!XdmcpReallocARRAY8 (&Hostname, namelen))
      return;
    for (i = 0; i < namelen; i++)
      Hostname.data[i] = name[i];
}

static void
direct_query_respond (
    struct sockaddr *from,
    int               fromlen,
    int               length,
    xdmOpCode         type,
    int               fd)
{
    ARRAYofARRAY8   queryAuthenticationNames;
    int               expectedLen;
    int               i;
    
    if (!XdmcpReadARRAYofARRAY8 (&buffer, &queryAuthenticationNames))
      return;
    expectedLen = 1;
    for (i = 0; i < (int)queryAuthenticationNames.length; i++)
      expectedLen += 2 + queryAuthenticationNames.data[i].length;
    if (length == expectedLen)
      all_query_respond (from, fromlen, &queryAuthenticationNames, type, fd);
    XdmcpDisposeARRAYofARRAY8 (&queryAuthenticationNames);
}

static void
query_respond (
    struct sockaddr *from,
    int               fromlen,
    int               length,
    int               fd)
{
    Debug ("Query respond %d\n", length);
    direct_query_respond (from, fromlen, length, QUERY, fd);
}

static void
broadcast_respond (
    struct sockaddr *from,
    int               fromlen,
    int               length,
    int               fd)
{
    direct_query_respond (from, fromlen, length, BROADCAST_QUERY, fd);
}

/* computes an X display name */

static char *
NetworkAddressToName(
    CARD16  connectionType,
    ARRAY8Ptr   connectionAddress,
    struct sockaddr   *originalAddress,
    CARD16  displayNumber)
{
    switch (connectionType)
    {
    case FamilyInternet:
#if defined(IPv6) && defined(AF_INET6)
    case FamilyInternet6:
      {
          CARD8         *data;
          struct hostent      *hostent;
          char          *hostname = NULL;
          char          *name;
          char          *localhost;
          int                  multiHomed = 0;
          struct addrinfo      hints, *ai = NULL, *nai;
          int            type;

          if (connectionType == FamilyInternet6)
            type = AF_INET6;
          else
            type = AF_INET;

          data = connectionAddress->data;
          hostent = gethostbyaddr ((char *)data,
                             connectionAddress->length, type);
          if (hostent) {
            if (sourceAddress) {
                bzero(&hints, sizeof(hints));
                hints.ai_flags = AI_CANONNAME;
                if (getaddrinfo(hostent->h_name, NULL, &hints, &ai) == 0) {
                  hostname = ai->ai_canonname;
                  for (nai = ai->ai_next; nai!=NULL; nai=nai->ai_next) {
                      if ((ai->ai_protocol == nai->ai_protocol) &&
                        (ai->ai_addrlen == nai->ai_addrlen) &&
                          (memcmp(ai->ai_addr,nai->ai_addr,
                              ai->ai_addrlen) != 0) ) {
                        multiHomed = 1;
                      }
                  }
                }
            } else {
                hostname = hostent->h_name;
            }
          }

          localhost = localHostname ();

          /* 
           * protect against bogus host names 
           */
          if (hostname && hostname[0] && (hostname[0] != '.') 
                  && !multiHomed)
          {
            if (!strcmp (localhost, hostname))
            {
                if (!getString (name, 10))
                  return 0;
                sprintf (name, ":%d", displayNumber);
            }
            else
            {
                if (removeDomainname)
                {
                  char    *localDot, *remoteDot;
    
                  /* check for a common domain name.  This
                   * could reduce names by recognising common
                   * super-domain names as well, but I don't think
                   * this is as useful, and will confuse more
                   * people
                   */
                  if ((localDot = strchr(localhost, '.')) &&
                        (remoteDot = strchr(hostname, '.')))
                  {
                      /* smash the name in place; it won't
                       * be needed later.
                       */
                      if (!strcmp (localDot+1, remoteDot+1))
                        *remoteDot = '\0';
                  }
                }

                if (!getString (name, strlen (hostname) + 10))
                  return 0;
                sprintf (name, "%s:%d", hostname, displayNumber);
            }
          }
          else
          {
            if (!getString (name, INET6_ADDRSTRLEN + 10))
                return 0;
            if (multiHomed) {
                if (connectionType == FamilyInternet) {
                  data = (CARD8 *) 
                    &((struct sockaddr_in *)originalAddress)->
                    sin_addr;
                } else {
                  data = (CARD8 *) 
                    &((struct sockaddr_in6 *)originalAddress)->sin6_addr;
                }
            }
            if (inet_ntop(type, data, name, INET6_ADDRSTRLEN) == NULL) {
                free(name);
                return 0;
            } 
            sprintf(name + strlen(name), ":%d", displayNumber);
          }
          if (ai)
            freeaddrinfo(ai);
          return name;
      }
#else /* IPv6 */
      {
          CARD8         *data;
          struct hostent      *hostent;
          char          *name;
          char          *localhost;
          int                  multiHomed = 0;

          data = connectionAddress->data;
          hostent = gethostbyaddr ((char *)data,
                             connectionAddress->length, AF_INET);
          if (sourceAddress && hostent) {
            hostent = gethostbyname(hostent->h_name);
            if (hostent)
                  multiHomed = hostent->h_addr_list[1] != NULL;
          }

          localhost = localHostname ();

          /* 
           * protect against bogus host names 
           */
          if (hostent && hostent->h_name && hostent->h_name[0]
                  && (hostent->h_name[0] != '.') 
                  && !multiHomed)
          {
            if (!strcmp (localhost, hostent->h_name))
            {
                if (!getString (name, 10))
                  return 0;
                sprintf (name, ":%d", displayNumber);
            }
            else
            {
                if (removeDomainname)
                {
                  char    *localDot, *remoteDot;
    
                  /* check for a common domain name.  This
                   * could reduce names by recognising common
                   * super-domain names as well, but I don't think
                   * this is as useful, and will confuse more
                   * people
                   */
                  if ((localDot = strchr(localhost, '.')) &&
                        (remoteDot = strchr(hostent->h_name, '.')))
                  {
                      /* smash the name in place; it won't
                       * be needed later.
                       */
                      if (!strcmp (localDot+1, remoteDot+1))
                        *remoteDot = '\0';
                  }
                }

                if (!getString (name, strlen (hostent->h_name) + 10))
                  return 0;
                sprintf (name, "%s:%d", hostent->h_name, displayNumber);
            }
          }
          else
          {
            if (!getString (name, 25))
                return 0;
            if (multiHomed)
                data = (CARD8 *) &((struct sockaddr_in *)originalAddress)->
                        sin_addr.s_addr;
            sprintf(name, "%d.%d.%d.%d:%d",
                  data[0], data[1], data[2], data[3], displayNumber);
          }
          return name;
      }
#endif /* IPv6 */
#ifdef DNET
    case FamilyDECnet:
      return NULL;
#endif /* DNET */
    default:
      return NULL;
    }
}

/*ARGSUSED*/
static void
forward_respond (
    struct sockaddr     *from,
    int                 fromlen,
    int                 length,
    int                 fd)
{
    ARRAY8      clientAddress;
    ARRAY8      clientPort;
    ARRAYofARRAY8   authenticationNames;
    struct sockaddr *client;
    int               clientlen;
    int               expectedLen;
    int               i;
    
    Debug ("Forward respond %d\n", length);
    clientAddress.length = 0;
    clientAddress.data = 0;
    clientPort.length = 0;
    clientPort.data = 0;
    authenticationNames.length = 0;
    authenticationNames.data = 0;
    if (XdmcpReadARRAY8 (&buffer, &clientAddress) &&
      XdmcpReadARRAY8 (&buffer, &clientPort) &&
      XdmcpReadARRAYofARRAY8 (&buffer, &authenticationNames))
    {
      expectedLen = 0;
      expectedLen += 2 + clientAddress.length;
      expectedLen += 2 + clientPort.length;
      expectedLen += 1;     /* authenticationNames */
      for (i = 0; i < (int)authenticationNames.length; i++)
          expectedLen += 2 + authenticationNames.data[i].length;
      if (length == expectedLen)
      {
          int     j;

          j = 0;
          for (i = 0; i < (int)clientPort.length; i++)
            j = j * 256 + clientPort.data[i];
          Debug ("Forward client address (port %d)", j);
          for (i = 0; i < (int)clientAddress.length; i++)
            Debug (" %d", clientAddress.data[i]);
          Debug ("\n");
          switch (from->sa_family)
          {
#ifdef AF_INET
          case AF_INET:
            {
                struct sockaddr_in  in_addr;

                if (clientAddress.length != 4 ||
                    clientPort.length != 2)
                {
                  goto badAddress;
                }
                bzero ((char *) &in_addr, sizeof (in_addr));
#ifdef BSD44SOCKETS
                in_addr.sin_len = sizeof(in_addr);
#endif
                in_addr.sin_family = AF_INET;
                memmove( &in_addr.sin_addr, clientAddress.data, 4);
                memmove( (char *) &in_addr.sin_port, clientPort.data, 2);
                client = (struct sockaddr *) &in_addr;
                clientlen = sizeof (in_addr);
                all_query_respond (client, clientlen, &authenticationNames,
                         FORWARD_QUERY, fd);
            }
            break;
#endif
#if defined(IPv6) && defined(AF_INET6)
          case AF_INET6:
            {
                struct sockaddr_in6 in6_addr;

                if (clientAddress.length != 16 ||
                    clientPort.length != 2)
                {
                  goto badAddress;
                }
                bzero ((char *) &in6_addr, sizeof (in6_addr));
#ifdef SIN6_LEN
                in6_addr.sin6_len = sizeof(in6_addr);
#endif
                in6_addr.sin6_family = AF_INET6;
                memmove(&in6_addr,clientAddress.data,clientAddress.length);
                memmove((char *) &in6_addr.sin6_port, clientPort.data, 2);
                client = (struct sockaddr *) &in6_addr;
                clientlen = sizeof (in6_addr);
                all_query_respond (client, clientlen, &authenticationNames,
                         FORWARD_QUERY, fd);
            }
            break;
#endif
#ifdef AF_UNIX
          case AF_UNIX:
            {
                struct sockaddr_un  un_addr;

                if (clientAddress.length >= sizeof (un_addr.sun_path))
                  goto badAddress;
                bzero ((char *) &un_addr, sizeof (un_addr));
                un_addr.sun_family = AF_UNIX;
                memmove( un_addr.sun_path, clientAddress.data, clientAddress.length);
                un_addr.sun_path[clientAddress.length] = '\0';
                client = (struct sockaddr *) &un_addr;
#if defined(BSD44SOCKETS) && !defined(Lynx) && defined(UNIXCONN)
                un_addr.sun_len = strlen(un_addr.sun_path);
                clientlen = SUN_LEN(&un_addr);
#else
                clientlen = sizeof (un_addr);
#endif
                all_query_respond (client, clientlen, &authenticationNames,
                         FORWARD_QUERY, fd);
            }
            break;
#endif
#ifdef AF_CHAOS
          case AF_CHAOS:
            goto badAddress;
#endif
#ifdef AF_DECnet
          case AF_DECnet:
            goto badAddress;
#endif
          }
      }
      else
      {
          Debug ("Forward length error got %d expect %d\n", length, expectedLen);
      }
    }
badAddress:
    XdmcpDisposeARRAY8 (&clientAddress);
    XdmcpDisposeARRAY8 (&clientPort);
    XdmcpDisposeARRAYofARRAY8 (&authenticationNames);
}

static void
send_willing (
    struct sockaddr *from,
    int               fromlen,
    ARRAY8Ptr         authenticationName,
    ARRAY8Ptr         status,
    int               fd)
{
    XdmcpHeader   header;

    Debug ("Send willing %*.*s %*.*s\n", authenticationName->length,
                               authenticationName->length,
                               pS(authenticationName->data),
                               status->length,
                               status->length,
                               pS(status->data));
    header.version = XDM_PROTOCOL_VERSION;
    header.opcode = (CARD16) WILLING;
    header.length = 6 + authenticationName->length +
                Hostname.length + status->length;
    XdmcpWriteHeader (&buffer, &header);
    XdmcpWriteARRAY8 (&buffer, authenticationName);
    XdmcpWriteARRAY8 (&buffer, &Hostname);
    XdmcpWriteARRAY8 (&buffer, status);
    XdmcpFlush (fd, &buffer, (XdmcpNetaddr) from, fromlen);
}

static void
send_unwilling (
    struct sockaddr *from,
    int               fromlen,
    ARRAY8Ptr         authenticationName,
    ARRAY8Ptr         status,
    int               fd)
{
    XdmcpHeader   header;

    Debug ("Send unwilling %*.*s %*.*s\n", authenticationName->length,
                               authenticationName->length,
                               pS(authenticationName->data),
                               status->length,
                               status->length,
                               pS(status->data));
    header.version = XDM_PROTOCOL_VERSION;
    header.opcode = (CARD16) UNWILLING;
    header.length = 4 + Hostname.length + status->length;
    XdmcpWriteHeader (&buffer, &header);
    XdmcpWriteARRAY8 (&buffer, &Hostname);
    XdmcpWriteARRAY8 (&buffer, status);
    XdmcpFlush (fd, &buffer, (XdmcpNetaddr) from, fromlen);
}

static unsigned long    globalSessionID;

#define NextSessionID()    (++globalSessionID)

void init_session_id(void)
{
    /* Set randomly so we are unlikely to reuse id's from a previous
     * incarnation so we don't say "Alive" to those displays.
     * Start with low digits 0 to make debugging easier.
     */
    globalSessionID = (time((Time_t)0)&0x7fff) * 16000;
}
    
static ARRAY8 outOfMemory = { (CARD16) 13, (CARD8Ptr) "Out of memory" };
static ARRAY8 noValidAddr = { (CARD16) 16, (CARD8Ptr) "No valid address" };
static ARRAY8 noValidAuth = { (CARD16) 22, (CARD8Ptr) "No valid authorization" };
static ARRAY8 noAuthentic = { (CARD16) 29, (CARD8Ptr) "XDM has no authentication key" };

static void
request_respond (
    struct sockaddr *from,
    int               fromlen,
    int               length,
    int               fd)
{
    CARD16      displayNumber;
    ARRAY16     connectionTypes;
    ARRAYofARRAY8   connectionAddresses;
    ARRAY8      authenticationName;
    ARRAY8      authenticationData;
    ARRAYofARRAY8   authorizationNames;
    ARRAY8      manufacturerDisplayID;
    ARRAY8Ptr         reason = 0;
    int               expectlen;
    int               i, j;
    struct protoDisplay  *pdpy;
    ARRAY8      authorizationName, authorizationData;
    ARRAY8Ptr         connectionAddress;

    Debug ("Request respond %d\n", length);
    connectionTypes.length = 0;
    connectionTypes.data = 0;
    connectionAddresses.length = 0;
    connectionAddresses.data = 0;
    authenticationName.length = 0;
    authenticationName.data = 0;
    authenticationData.length = 0;
    authenticationData.data = 0;
    authorizationNames.length = 0;
    authorizationNames.data = 0;
    authorizationName.length = 0;
    authorizationName.data = 0;
    authorizationData.length = 0;
    authorizationData.data = 0;
    manufacturerDisplayID.data = 0;
    if (XdmcpReadCARD16 (&buffer, &displayNumber) &&
      XdmcpReadARRAY16 (&buffer, &connectionTypes) &&
      XdmcpReadARRAYofARRAY8 (&buffer, &connectionAddresses) &&
      XdmcpReadARRAY8 (&buffer, &authenticationName) &&
      XdmcpReadARRAY8 (&buffer, &authenticationData) &&
      XdmcpReadARRAYofARRAY8 (&buffer, &authorizationNames) &&
      XdmcpReadARRAY8 (&buffer, &manufacturerDisplayID))
    {
      expectlen = 0;
      expectlen += 2;                         /* displayNumber */
      expectlen += 1 + 2*connectionTypes.length;  /* connectionTypes */
      expectlen += 1;                         /* connectionAddresses */
      for (i = 0; i < (int)connectionAddresses.length; i++)
          expectlen += 2 + connectionAddresses.data[i].length;
      expectlen += 2 + authenticationName.length; /* authenticationName */
      expectlen += 2 + authenticationData.length; /* authenticationData */
      expectlen += 1;                         /* authoriationNames */
      for (i = 0; i < (int)authorizationNames.length; i++)
          expectlen += 2 + authorizationNames.data[i].length;
      expectlen += 2 + manufacturerDisplayID.length;  /* displayID */
      if (expectlen != length)
      {
          Debug ("Request length error got %d expect %d\n", length, expectlen);
          goto abort;
      }
      if (connectionTypes.length == 0 ||
          connectionAddresses.length != connectionTypes.length)
      {
          reason = &noValidAddr;
          pdpy = 0;
          goto decline;
      }
      pdpy = FindProtoDisplay ((XdmcpNetaddr) from, fromlen, displayNumber);
      if (!pdpy) {

          /* Check this Display against the Manager's policy */
          reason = Accept (from, fromlen, displayNumber);
          if (reason)
            goto decline;

          /* Check the Display's stream services against Manager's policy */
          i = SelectConnectionTypeIndex (&connectionTypes,
                                 &connectionAddresses);
          if (i < 0) {
            reason = &noValidAddr;
            goto decline;
          }
      
          /* The Manager considers this a new session */
          connectionAddress = &connectionAddresses.data[i];
          pdpy = NewProtoDisplay ((XdmcpNetaddr) from, fromlen, displayNumber,
                            connectionTypes.data[i], connectionAddress,
                            NextSessionID());
          Debug ("NewProtoDisplay %p\n", pdpy);
          if (!pdpy) {
            reason = &outOfMemory;
            goto decline;
          }
      }
      if (authorizationNames.length == 0)
          j = 0;
      else
          j = SelectAuthorizationTypeIndex (&authenticationName,
                                    &authorizationNames);
      if (j < 0)
      {
          reason = &noValidAuth;
          goto decline;
      }
      if (!CheckAuthentication (pdpy,
                          &manufacturerDisplayID,
                          &authenticationName,
                          &authenticationData))
      {
          reason = &noAuthentic;
          goto decline;
      }
      if (j < (int)authorizationNames.length)
      {
          Xauth   *auth;
          SetProtoDisplayAuthorization (pdpy,
            (unsigned short) authorizationNames.data[j].length,
            (char *) authorizationNames.data[j].data);
          auth = pdpy->xdmcpAuthorization;
          if (!auth)
            auth = pdpy->fileAuthorization;
          if (auth)
          {
            authorizationName.length = auth->name_length;
            authorizationName.data = (CARD8Ptr) auth->name;
            authorizationData.length = auth->data_length;
            authorizationData.data = (CARD8Ptr) auth->data;
          }
      }
      if (pdpy)
      {
          send_accept (from, fromlen, pdpy->sessionID,
                                &authenticationName,
                              &authenticationData,
                              &authorizationName,
                              &authorizationData, fd);
      }
      else
      {
decline:    ;
          send_decline (from, fromlen, &authenticationName,
                         &authenticationData,
                         reason, fd);
            if (pdpy)
            DisposeProtoDisplay (pdpy);
      }
    }
abort:
    XdmcpDisposeARRAY16 (&connectionTypes);
    XdmcpDisposeARRAYofARRAY8 (&connectionAddresses);
    XdmcpDisposeARRAY8 (&authenticationName);
    XdmcpDisposeARRAY8 (&authenticationData);
    XdmcpDisposeARRAYofARRAY8 (&authorizationNames);
    XdmcpDisposeARRAY8 (&manufacturerDisplayID);
}

static void
send_accept (
    struct sockaddr *to,
    int               tolen,
    CARD32      sessionID,
    ARRAY8Ptr         authenticationName,
    ARRAY8Ptr         authenticationData,
    ARRAY8Ptr         authorizationName,
    ARRAY8Ptr         authorizationData,
    int               fd)
{
    XdmcpHeader   header;

    Debug ("Accept Session ID %ld\n", (long) sessionID);
    header.version = XDM_PROTOCOL_VERSION;
    header.opcode = (CARD16) ACCEPT;
    header.length = 4;                  /* session ID */
    header.length += 2 + authenticationName->length;
    header.length += 2 + authenticationData->length;
    header.length += 2 + authorizationName->length;
    header.length += 2 + authorizationData->length;
    XdmcpWriteHeader (&buffer, &header);
    XdmcpWriteCARD32 (&buffer, sessionID);
    XdmcpWriteARRAY8 (&buffer, authenticationName);
    XdmcpWriteARRAY8 (&buffer, authenticationData);
    XdmcpWriteARRAY8 (&buffer, authorizationName);
    XdmcpWriteARRAY8 (&buffer, authorizationData);
    XdmcpFlush (fd, &buffer, (XdmcpNetaddr) to, tolen);
}
   
static void
send_decline (
    struct sockaddr *to,
    int               tolen,
    ARRAY8Ptr         authenticationName,
    ARRAY8Ptr         authenticationData,
    ARRAY8Ptr         status,
    int                     fd)
{
    XdmcpHeader   header;

    Debug ("Decline %*.*s\n", status->length, status->length, pS(status->data));
    header.version = XDM_PROTOCOL_VERSION;
    header.opcode = (CARD16) DECLINE;
    header.length = 0;
    header.length += 2 + status->length;
    header.length += 2 + authenticationName->length;
    header.length += 2 + authenticationData->length;
    XdmcpWriteHeader (&buffer, &header);
    XdmcpWriteARRAY8 (&buffer, status);
    XdmcpWriteARRAY8 (&buffer, authenticationName);
    XdmcpWriteARRAY8 (&buffer, authenticationData);
    XdmcpFlush (fd, &buffer, (XdmcpNetaddr) to, tolen);
}

static void
manage (
    struct sockaddr *from,
    int               fromlen,
    int               length,
    int               fd)
{
    CARD32        sessionID;
    CARD16        displayNumber;
    ARRAY8        displayClass;
    int                 expectlen;
    struct protoDisplay *pdpy;
    struct display      *d;
    char          *name = NULL;
    char          *class = NULL;
    XdmcpNetaddr  from_save;
    ARRAY8        clientAddress, clientPort;
    CARD16        connectionType;

    Debug ("Manage %d\n", length);
    displayClass.data = 0;
    displayClass.length = 0;
    if (XdmcpReadCARD32 (&buffer, &sessionID) &&
      XdmcpReadCARD16 (&buffer, &displayNumber) &&
      XdmcpReadARRAY8 (&buffer, &displayClass))
    {
      expectlen = 4 +                     /* session ID */
                2 +                       /* displayNumber */
                2 + displayClass.length;  /* displayClass */
      if (expectlen != length)
      {
          Debug ("Manage length error got %d expect %d\n", length, expectlen);
          goto abort;
      }
      pdpy = FindProtoDisplay ((XdmcpNetaddr) from, fromlen, displayNumber);
      Debug ("Manage Session ID %ld, pdpy %p\n", (long) sessionID, pdpy);
      if (!pdpy || pdpy->sessionID != sessionID)
      {
          /*
           * We may have already started a session for this display
           * but it hasn't seen the response in the form of an
           * XOpenDisplay() yet. So check if it is in the list of active
           * displays, and if so check that the session id's match.
           * If all this is true, then we have a duplicate request that
           * can be ignored.
           */
          if (!pdpy 
            && (d = FindDisplayByAddress((XdmcpNetaddr) from, fromlen, displayNumber))
            && d->sessionID == sessionID) {
                 Debug("manage: got duplicate pkt, ignoring\n");
                 goto abort;
          }
          Debug ("Session ID %ld refused\n", (long) sessionID);
          if (pdpy)
            Debug ("Existing Session ID %ld\n", (long) pdpy->sessionID);
          send_refuse (from, fromlen, sessionID, fd);
      }
      else
      {
          name = NetworkAddressToName (pdpy->connectionType,
                               &pdpy->connectionAddress,
                               from,
                               pdpy->displayNumber);
          Debug ("Computed display name: %s for: %s\n",
               name, (char *)pdpy->connectionAddress.data);
          if (!name)
          {
            send_failed (from, fromlen, "(no name)", sessionID, 
              "out of memory", fd);
            goto abort;
          }
          d = FindDisplayByName (name);
          if (d)
          {
            Debug ("Terminating active session for %s\n", d->name);
            StopDisplay (d);
          }
          class = malloc (displayClass.length + 1);
          if (!class)
          {
            send_failed (from, fromlen, name, sessionID, 
              "out of memory", fd);
            goto abort;
          }
          if (displayClass.length)
          {
            memmove( class, displayClass.data, displayClass.length);
            class[displayClass.length] = '\0';
          }
          else
          {
            free ((char *) class);
            class = (char *) NULL;
          }
          from_save = (XdmcpNetaddr) malloc (fromlen);
          if (!from_save)
          {
            send_failed (from, fromlen, name, sessionID,
              "out of memory", fd);
            goto abort;
          }
          memmove( from_save, from, fromlen);
          d = NewDisplay (name, class);
          if (!d)
          {
            free ((char *) from_save);
            send_failed (from, fromlen, name, sessionID, 
              "out of memory", fd);
            goto abort;
          }
          d->displayType.location = Foreign;
          d->displayType.lifetime = Transient;
          d->displayType.origin = FromXDMCP;
          d->sessionID = pdpy->sessionID;
          d->from = from_save;
          d->fromlen = fromlen;
          d->displayNumber = pdpy->displayNumber;
          ClientAddress (from, &clientAddress, &clientPort, &connectionType);
          d->useChooser = 0;
          d->xdmcpFd = fd;
          if (IsIndirectClient (&clientAddress, connectionType))
          {
            Debug ("IsIndirectClient\n");
            ForgetIndirectClient (&clientAddress, connectionType);
            if (UseChooser (&clientAddress, connectionType))
            {
                d->useChooser = 1;
                Debug ("Use chooser for %s\n", d->name);
            }
          }
          d->clientAddr = clientAddress;
          d->connectionType = connectionType;
          XdmcpDisposeARRAY8 (&clientPort);
          if (pdpy->fileAuthorization)
          {
            d->authorizations = (Xauth **) malloc (sizeof (Xauth *));
            if (!d->authorizations)
            {
                free ((char *) from_save);
                free ((char *) d);
                send_failed (from, fromlen, name, sessionID,
                  "out of memory", fd);
                goto abort;
            }
            d->authorizations[0] = pdpy->fileAuthorization;
            d->authNum = 1;
            pdpy->fileAuthorization = 0;
          }
          DisposeProtoDisplay (pdpy);
          Debug ("Starting display %s,%s\n", d->name, d->class);
          StartDisplay (d);
      }
    }
abort:
    XdmcpDisposeARRAY8 (&displayClass);
    if (name) free ((char*) name);
    if (class) free ((char*) class);
}

void
SendFailed (
    struct display  *d,
    char        *reason)
{
    Debug ("Display start failed, sending Failed\n");
    send_failed ((struct sockaddr *)(d->from), d->fromlen, d->name, 
      d->sessionID, reason, d->xdmcpFd);
}

static void
send_failed (
    struct sockaddr *from,
    int               fromlen,
    char        *name,
    CARD32      sessionID,
    char        *reason,
    int               fd)
{
    static char   buf[256];
    XdmcpHeader   header;
    ARRAY8  status;

    sprintf (buf, "Session %ld failed for display %.100s: %.100s",
           (long) sessionID, name, reason);
    Debug ("Send failed %ld %s\n", (long) sessionID, buf);
    status.length = strlen (buf);
    status.data = (CARD8Ptr) buf;
    header.version = XDM_PROTOCOL_VERSION;
    header.opcode = (CARD16) FAILED;
    header.length = 6 + status.length;
    XdmcpWriteHeader (&buffer, &header);
    XdmcpWriteCARD32 (&buffer, sessionID);
    XdmcpWriteARRAY8 (&buffer, &status);
    XdmcpFlush (fd, &buffer, (XdmcpNetaddr) from, fromlen);
}

static void
send_refuse (
    struct sockaddr *from,
    int               fromlen,
    CARD32      sessionID,
    int               fd)
{
    XdmcpHeader   header;

    Debug ("Send refuse %ld\n", (long) sessionID);
    header.version = XDM_PROTOCOL_VERSION;
    header.opcode = (CARD16) REFUSE;
    header.length = 4;
    XdmcpWriteHeader (&buffer, &header);
    XdmcpWriteCARD32 (&buffer, sessionID);
    XdmcpFlush (fd, &buffer, (XdmcpNetaddr) from, fromlen);
}

static void
send_alive (
    struct sockaddr *from,
    int               fromlen,
    int               length,
    int               fd)
{
    CARD32        sessionID;
    CARD16        displayNumber;
    struct display      *d;
    XdmcpHeader         header;
    CARD8         sendRunning;
    CARD32        sendSessionID;

    Debug ("Send alive\n");
    if (XdmcpReadCARD16 (&buffer, &displayNumber) &&
      XdmcpReadCARD32 (&buffer, &sessionID))
    {
      if (length == 6)
      {
          d = FindDisplayBySessionID (sessionID);
          if (!d) {
            d = FindDisplayByAddress ((XdmcpNetaddr) from, fromlen, displayNumber);
          }
          sendRunning = 0;
          sendSessionID = 0;
          if (d && d->status == running)
          {
            if (d->sessionID == sessionID)
                sendRunning = 1;
            sendSessionID = d->sessionID;
          }
          header.version = XDM_PROTOCOL_VERSION;
          header.opcode = (CARD16) ALIVE;
          header.length = 5;
          Debug ("alive: %d %ld\n", sendRunning, (long) sendSessionID);
          XdmcpWriteHeader (&buffer, &header);
          XdmcpWriteCARD8 (&buffer, sendRunning);
          XdmcpWriteCARD32 (&buffer, sendSessionID);
          XdmcpFlush (fd, &buffer, (XdmcpNetaddr) from, fromlen);
      }
    }
}

char *
NetworkAddressToHostname (
    CARD16  connectionType,
    ARRAY8Ptr   connectionAddress)
{
    char    *name = NULL;

    switch (connectionType)
    {
    case FamilyInternet:
#if defined(IPv6) && defined(AF_INET6)
    case FamilyInternet6:
#endif
      {
          struct hostent      *hostent = NULL;
#if defined(IPv6) && defined(AF_INET6)
          char dotted[INET6_ADDRSTRLEN];
#else
          char dotted[20];
#endif
          char *local_name = "";
          int af_type;

#if defined(IPv6) && defined(AF_INET6)
          if (connectionType == FamilyInternet6)
            af_type = AF_INET6;
          else
#endif
            af_type = AF_INET;

          hostent = gethostbyaddr ((char *)connectionAddress->data,
                              connectionAddress->length, af_type);

          if (hostent) {
            /* check for DNS spoofing */
#if defined(IPv6) && defined(AF_INET6)
            struct addrinfo   *ai = NULL, *nai;
            if (getaddrinfo(hostent->h_name, NULL, NULL, &ai) == 0) {
                for (nai = ai; nai != NULL; nai = nai->ai_next) {
                  if ((af_type == nai->ai_family) &&
                    (connectionAddress->length == nai->ai_addrlen) &&
                    (memcmp(connectionAddress->data,nai->ai_addr,
                      nai->ai_addrlen) == 0) ) {
                      break;
                  }
                }
                if (ai == NULL) {
                  inet_ntop(af_type, connectionAddress->data, 
                    dotted, sizeof(dotted));

                  LogError("Possible DNS spoof attempt %s->%s.", dotted,
                    hostent->h_name);
                  hostent = NULL;
                }
                freeaddrinfo(ai);
            } else {
                hostent = NULL;
            }
#else
            char *s = strdup(hostent->h_name); /* fscking non-reentrancy of getXXX() */
            if ((hostent = gethostbyname(s))) {
                  if (memcmp((char*)connectionAddress->data, hostent->h_addr,
                      hostent->h_length) != 0) {
                        LogError("Possible DNS spoof attempt.");
                        hostent = NULL; /* so it enters next if() */
                  } else {
                        local_name = hostent->h_name;
                  }
            }
            free(s);
#endif
          }

          if (!hostent) {
            /* can't get name, so use emergency fallback */
#if defined(IPv6) && defined(AF_INET6)
            inet_ntop(af_type, connectionAddress->data, 
                    dotted, sizeof(dotted));
#else
            sprintf(dotted, "%d.%d.%d.%d",
                  connectionAddress->data[0],
                  connectionAddress->data[1],
                  connectionAddress->data[2],
                  connectionAddress->data[3]);
#endif
            local_name = dotted;
            LogError ("Cannot convert Internet address %s to host name\n",
                    dotted);
          }
          if (!getString (name, strlen (local_name)))
            break;
          strcpy (name, local_name);
          break;
      }
#ifdef DNET
    case FamilyDECnet:
      break;
#endif /* DNET */
    default:
      break;
    }
    return name;
}

#if 0
static int
HostnameToNetworkAddress (
char      *name,
CARD16          connectionType,
ARRAY8Ptr   connectionAddress)
{
    switch (connectionType)
    {
    case FamilyInternet:
      {
          struct hostent      *hostent;

          hostent = gethostbyname (name);
          if (!hostent)
            return FALSE;
          if (!XdmcpAllocARRAY8 (connectionAddress, hostent->h_length))
            return FALSE;
          memmove( connectionAddress->data, hostent->h_addr, hostent->h_length);
          return TRUE;
      }
#ifdef DNET
    case FamilyDECnet:
      return FALSE;
#endif
    }
    return FALSE;
}

/*
 * converts a display name into a network address, using
 * the same rules as XOpenDisplay (algorithm cribbed from there)
 */
static int
NameToNetworkAddress(
char      *name,
CARD16Ptr   connectionTypep,
ARRAY8Ptr   connectionAddress,
CARD16Ptr   displayNumber)
{
    char    *colon, *display_number;
    char    hostname[1024];
    int         dnet = FALSE;
    CARD16  number;
    CARD16  connectionType;

    colon = strchr(name, ':');
    if (!colon)
      return FALSE;
    if (colon != name)
    {
      if (colon - name > sizeof (hostname))
          return FALSE;
      strncpy (hostname, name, colon - name);
      hostname[colon - name] = '\0';
    }
    else
    {
      strcpy (hostname, localHostname ());
    }
    if (colon[1] == ':')
    {
      dnet = TRUE;
      colon++;
    }
#ifndef DNETCONN
    if (dnet)
      return FALSE;
#endif
    display_number = colon + 1;
    while (*display_number && *display_number != '.')
    {
      if (!isascii (*display_number) || !isdigit(*display_number))
          return FALSE;
    }
    if (display_number == colon + 1)
      return FALSE;
    number = atoi (colon + 1);
#ifdef DNETCONN
    if (dnet)
      connectionType = FamilyDECnet;
    else
#endif
      connectionType = FamilyInternet;
    if (!HostnameToNetworkAddress (hostname, connectionType, connectionAddress))
      return FALSE;
    *displayNumber = number;
    *connectionTypep = connectionType;
    return TRUE;
}
#endif

#endif /* XDMCP */

Generated by  Doxygen 1.6.0   Back to index