IABSD.fr/xenocara/app/xdm/streams.c

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  Commit

• Author : matthieu
  Date : 2010-03-28 09:33:02
  Hash : 21c33a1b
  Message : Update to xdm 1.1.9

• app/xdm/streams.c

• /*
  
  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.
  
  */
  
  /*
   * xdm - display manager daemon
   * Author:  Keith Packard, MIT X Consortium
   *
   * streams.c - Support for STREAMS
   */
  
  #include "dm.h"
  #include "dm_error.h"
  
  #ifdef XDMCP
  # ifdef STREAMSCONN
  
  #  include <fcntl.h>
  #  include <tiuser.h>
  #  include <netconfig.h>
  #  include <netdir.h>
  
  extern int	xdmcpFd;
  extern int	chooserFd;
  
  extern FD_TYPE	WellKnownSocketsMask;
  extern int	WellKnownSocketsMax;
  
  void
  CreateWellKnownSockets (void)
  {
      struct t_bind bind_addr;
      struct netconfig *nconf;
      struct nd_hostserv service;
      struct nd_addrlist *servaddrs;
      char *name, *localHostname();
      char bindbuf[15];
      int it;
  
      if (request_port == 0)
  	return;
      Debug ("creating UDP stream %d\n", request_port);
  
      nconf = getnetconfigent("udp");
      if (!nconf) {
  	t_error("getnetconfigent udp");
  	return;
      }
  
      xdmcpFd = t_open(nconf->nc_device, O_RDWR, NULL);
      if (xdmcpFd == -1) {
  	LogError ("XDMCP stream creation failed\n");
  	t_error ("CreateWellKnownSockets(xdmcpFd): t_open failed");
  	return;
      }
      name = localHostname ();
      registerHostname (name, strlen (name));
      RegisterCloseOnFork (xdmcpFd);
  
      service.h_host = HOST_SELF;
      snprintf(bindbuf, sizeof(bindbuf), "%d", request_port);
      service.h_serv = bindbuf;
      netdir_getbyname(nconf, &service, &servaddrs);
      freenetconfigent(nconf);
  
      bind_addr.qlen = 5;
      bind_addr.addr.buf = servaddrs->n_addrs[0].buf;
      bind_addr.addr.len = servaddrs->n_addrs[0].len;
      bind_addr.addr.maxlen = servaddrs->n_addrs[0].len;
      it = t_bind(xdmcpFd, &bind_addr, &bind_addr);
      netdir_free((char *)servaddrs, ND_ADDRLIST);
      if (it < 0)
      {
  	LogError ("error binding STREAMS address %d\n", request_port);
  	t_error("CreateWellKNowSocket(xdmcpFd): t_bind failed");
  	t_close (xdmcpFd);
  	xdmcpFd = -1;
  	return;
      }
      WellKnownSocketsMax = xdmcpFd;
      FD_SET (xdmcpFd, &WellKnownSocketsMask);
  
      chooserFd = t_open ("/dev/tcp", O_RDWR, NULL);
      Debug ("Created chooser fd %d\n", chooserFd);
      if (chooserFd == -1)
      {
  	LogError ("chooser stream creation failed\n");
  	t_error("CreateWellKnowSockets(chooserFd): t_open failed");
  	return;
      }
      bind_addr.qlen = 5;
      bind_addr.addr.len = 0;
      bind_addr.addr.maxlen = 0;
      if( t_bind( chooserFd, &bind_addr, NULL ) < 0 )
      {
          t_error("CreateWellKnowSockets(chooserFd): t_bind failed");
      }
  
      if (chooserFd > WellKnownSocketsMax)
  	WellKnownSocketsMax = chooserFd;
      FD_SET (chooserFd, &WellKnownSocketsMask);
  }
  
  int
  GetChooserAddr (char *addr,	/* return */
      int *lenp)			/* size of addr, returned as amt used */
  {
      struct netbuf nbuf;
      int retval;
  
      nbuf.buf = addr;
      nbuf.len = *lenp;
      nbuf.maxlen = *lenp;
      retval = t_getname (chooserFd, &nbuf, LOCALNAME);
      if (retval < 0) {
  	if (debugLevel > 0)
  	    t_error("t_getname on chooser fd");
      }
      *lenp = nbuf.len;
      return retval;
  }
  
  /* TODO: Implement support for controlling which interfaces are listened on
     and for listening to multicast addresses.  See the sockets equivalent in
     sockets.c for details. */
  
  void UpdateListenSockets (void)
  {
      return;
  }
  
  void CloseListenSockets (void)
  {
      return;
  }
  
  void ProcessListenSockets (fd_set *readmask)
  {
      return;
  }
  
  # endif /* STREAMSCONN */
  #endif /* XDMCP */