workspace/kdm/backend/protodpy.c

   1 /*
   2
   3 Copyright 1988, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included
  12 in all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  17 IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 OTHER DEALINGS IN THE SOFTWARE.
  21
  22 Except as contained in this notice, the name of a copyright holder shall
  23 not be used in advertising or otherwise to promote the sale, use or
  24 other dealings in this Software without prior written authorization
  25 from the copyright holder.
  26
  27 */
  28
  29 /*
  30  * xdm - display manager daemon
  31  * Author: Keith Packard, MIT X Consortium
  32  *
  33  * manage a collection of proto-displays.  These are displays for
  34  * which sessionID's have been generated, but no session has been
  35  * started.
  36  */
  37
  38 #include "dm.h"
  39 #include "dm_error.h"
  40
  41 static struct protoDisplay *protoDisplays;
  42
  43 struct protoDisplay *
  44 findProtoDisplay( XdmcpNetaddr address,
  45                   int addrlen,
  46                   CARD16 displayNumber )
  47 {
  48         struct protoDisplay *pdpy;
  49
  50         debug( "findProtoDisplay\n" );
  51         for (pdpy = protoDisplays; pdpy; pdpy=pdpy->next) {
  52                 if (pdpy->displayNumber == displayNumber &&
  53                     addressEqual( address, addrlen, pdpy->address, pdpy->addrlen ))
  54                 {
  55                         return pdpy;
  56                 }
  57         }
  58         return (struct protoDisplay *)False;
  59 }
  60
  61 static void
  62 timeoutProtoDisplays( void )
  63 {
  64         struct protoDisplay *pdpy, *next;
  65
  66         for (pdpy = protoDisplays; pdpy; pdpy = next) {
  67                 next = pdpy->next;
  68                 if (pdpy->date < (unsigned long)(now - PROTO_TIMEOUT))
  69                         disposeProtoDisplay( pdpy );
  70         }
  71 }
  72
  73 struct protoDisplay *
  74 newProtoDisplay( XdmcpNetaddr address, int addrlen, CARD16 displayNumber,
  75                  CARD16 connectionType, ARRAY8Ptr connectionAddress,
  76                  CARD32 sessionID )
  77 {
  78         struct protoDisplay *pdpy;
  79
  80         debug( "newProtoDisplay\n" );
  81         timeoutProtoDisplays();
  82         pdpy = (struct protoDisplay *)Malloc( sizeof(*pdpy) );
  83         if (!pdpy)
  84                 return NULL;
  85         pdpy->address = (XdmcpNetaddr)Malloc( addrlen );
  86         if (!pdpy->address) {
  87                 free( (char *)pdpy );
  88                 return NULL;
  89         }
  90         pdpy->addrlen = addrlen;
  91         memmove( pdpy->address, address, addrlen );
  92         pdpy->displayNumber = displayNumber;
  93         pdpy->connectionType = connectionType;
  94         pdpy->date = now;
  95         if (!XdmcpCopyARRAY8( connectionAddress, &pdpy->connectionAddress )) {
  96                 free( (char *)pdpy->address );
  97                 free( (char *)pdpy );
  98                 return NULL;
  99         }
 100         pdpy->sessionID = sessionID;
 101         pdpy->fileAuthorization = (Xauth *)NULL;
 102         pdpy->xdmcpAuthorization = (Xauth *)NULL;
 103         pdpy->next = protoDisplays;
 104         protoDisplays = pdpy;
 105         return pdpy;
 106 }
 107
 108 void
 109 disposeProtoDisplay( struct protoDisplay *pdpy )
 110 {
 111         struct protoDisplay *p, *prev;
 112
 113         prev = False;
 114         for (p = protoDisplays; p; p=p->next) {
 115                 if (p == pdpy)
 116                         break;
 117                 prev = p;
 118         }
 119         if (!p)
 120                 return;
 121         if (prev)
 122                 prev->next = pdpy->next;
 123         else
 124                 protoDisplays = pdpy->next;
 125         bzero( &pdpy->key, sizeof(pdpy->key) );
 126         if (pdpy->fileAuthorization)
 127                 XauDisposeAuth( pdpy->fileAuthorization );
 128         if (pdpy->xdmcpAuthorization)
 129                 XauDisposeAuth( pdpy->xdmcpAuthorization );
 130         XdmcpDisposeARRAY8( &pdpy->connectionAddress );
 131         free( (char *)pdpy->address );
 132         free( (char *)pdpy );
 133 }