protodpy.c   [plain text]

/*
 * $Xorg: protodpy.c,v 1.4 2001/02/09 02:05:40 xorgcvs Exp $
 *
Copyright 1989, 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
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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
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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in this Software without prior written authorization from The Open Group.
 *
 * Author:  Keith Packard, MIT X Consortium
 */
/* $XFree86: xc/programs/xdm/protodpy.c,v 1.5 2001/12/14 20:01:23 dawes Exp $ */

/*
 * protodpy.c
 *
 * manage a collection of proto-displays.  These are displays for
 * which sessionID's have been generated, but no session has been
 * started.
 */

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

#ifdef XDMCP

#include <sys/types.h>
#include <time.h>
#define Time_t time_t

static struct protoDisplay	*protoDisplays;

#ifdef DEBUG
static
PrintProtoDisplay (pdpy)
    struct protoDisplay	*pdpy;
{
    Debug ("ProtoDisplay 0x%x\n", pdpy);
    Debug ("\taddress: ");
    PrintSockAddr (pdpy->address, pdpy->addrlen);
    Debug ("\tdate %d (%d from now)\n", pdpy->date, time(0) - pdpy->date);
    Debug ("\tdisplay Number %d\n", pdpy->displayNumber);
    Debug ("\tsessionID %d\n", pdpy->sessionID);
}
#endif

struct protoDisplay *
FindProtoDisplay (
    XdmcpNetaddr    address,
    int		    addrlen,
    CARD16	    displayNumber)
{
    struct protoDisplay	*pdpy;

    Debug ("FindProtoDisplay\n");
    for (pdpy = protoDisplays; pdpy; pdpy=pdpy->next)
    {
	if (pdpy->displayNumber == displayNumber &&
	    addressEqual (address, addrlen, pdpy->address, pdpy->addrlen))
	{
	    return pdpy;
	}
    }
    return (struct protoDisplay *) 0;
}

static void
TimeoutProtoDisplays (Time_t now)
{
    struct protoDisplay	*pdpy, *next;

    for (pdpy = protoDisplays; pdpy; pdpy = next)
    {
	next = pdpy->next;
	if (pdpy->date < now - PROTO_TIMEOUT)
	    DisposeProtoDisplay (pdpy);
    }
}

struct protoDisplay *
NewProtoDisplay (
    XdmcpNetaddr    address,
    int		    addrlen,
    CARD16	    displayNumber,
    CARD16	    connectionType,
    ARRAY8Ptr	    connectionAddress,
    CARD32	    sessionID)
{
    struct protoDisplay	*pdpy;
    Time_t date;

    Debug ("NewProtoDisplay\n");
    time (&date);
    TimeoutProtoDisplays (date);
    pdpy = (struct protoDisplay *) malloc (sizeof *pdpy);
    if (!pdpy)
	return NULL;
    pdpy->address = (XdmcpNetaddr) malloc (addrlen);
    if (!pdpy->address)
    {
	free ((char *) pdpy);
	return NULL;
    }
    pdpy->addrlen = addrlen;
    memmove( pdpy->address, address, addrlen);
    pdpy->displayNumber = displayNumber;
    pdpy->connectionType = connectionType;
    pdpy->date = date;
    if (!XdmcpCopyARRAY8 (connectionAddress, &pdpy->connectionAddress))
    {
	free ((char *) pdpy->address);
	free ((char *) pdpy);
	return NULL;
    }
    pdpy->sessionID = sessionID;
    pdpy->fileAuthorization = (Xauth *) NULL;
    pdpy->xdmcpAuthorization = (Xauth *) NULL;
    pdpy->next = protoDisplays;
    protoDisplays = pdpy;
    return pdpy;
}

void
DisposeProtoDisplay (pdpy)
    struct protoDisplay	*pdpy;
{
    struct protoDisplay	*p, *prev;

    prev = 0;
    for (p = protoDisplays; p; p=p->next)
    {
	if (p == pdpy)
	    break;
	prev = p;
    }
    if (!p)
	return;
    if (prev)
	prev->next = pdpy->next;
    else
	protoDisplays = pdpy->next;
    bzero(&pdpy->key, sizeof(pdpy->key));
    if (pdpy->fileAuthorization)
	XauDisposeAuth (pdpy->fileAuthorization);
    if (pdpy->xdmcpAuthorization)
	XauDisposeAuth (pdpy->xdmcpAuthorization);
    XdmcpDisposeARRAY8 (&pdpy->connectionAddress);
    free ((char *) pdpy->address);
    free ((char *) pdpy);
}

#endif /* XDMCP */