235 lines
7.3 KiB
C
235 lines
7.3 KiB
C
/*
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* Copyright 2007-2008 Peter Hutterer
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Peter Hutterer, University of South Australia, NICTA
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "windowstr.h"
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#include <X11/extensions/ge.h>
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#include "geint.h"
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#include "geext.h"
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#include "protocol-versions.h"
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#include "extinit.h"
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DevPrivateKeyRec GEClientPrivateKeyRec;
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GEExtension GEExtensions[MAXEXTENSIONS];
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/* Major available requests */
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static const int version_requests[] = {
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X_GEQueryVersion, /* before client sends QueryVersion */
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X_GEQueryVersion, /* must be set to last request in version 1 */
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};
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/* Forward declarations */
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static void SGEGenericEvent(xEvent *from, xEvent *to);
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#define EXT_MASK(ext) ((ext) & 0x7F)
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/************************************************************/
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/* request handlers */
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/************************************************************/
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static int
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ProcGEQueryVersion(ClientPtr client)
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{
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GEClientInfoPtr pGEClient = GEGetClient(client);
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xGEQueryVersionReply rep;
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REQUEST(xGEQueryVersionReq);
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REQUEST_SIZE_MATCH(xGEQueryVersionReq);
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rep = (xGEQueryVersionReply) {
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.repType = X_Reply,
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.RepType = X_GEQueryVersion,
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.sequenceNumber = client->sequence,
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.length = 0,
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/* return the supported version by the server */
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.majorVersion = SERVER_GE_MAJOR_VERSION,
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.minorVersion = SERVER_GE_MINOR_VERSION
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};
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/* Remember version the client requested */
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pGEClient->major_version = stuff->majorVersion;
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pGEClient->minor_version = stuff->minorVersion;
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if (client->swapped) {
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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swaps(&rep.majorVersion);
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swaps(&rep.minorVersion);
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}
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WriteToClient(client, sizeof(xGEQueryVersionReply), &rep);
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return Success;
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}
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static int (*ProcGEVector[GENumberRequests]) (ClientPtr) = {
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/* Version 1.0 */
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ProcGEQueryVersion,
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};
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/************************************************************/
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/* swapped request handlers */
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/************************************************************/
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static int _X_COLD
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SProcGEQueryVersion(ClientPtr client)
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{
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REQUEST(xGEQueryVersionReq);
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swaps(&stuff->length);
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REQUEST_SIZE_MATCH(xGEQueryVersionReq);
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swaps(&stuff->majorVersion);
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swaps(&stuff->minorVersion);
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return (*ProcGEVector[stuff->ReqType]) (client);
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}
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static int (*SProcGEVector[GENumberRequests]) (ClientPtr) = {
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/* Version 1.0 */
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SProcGEQueryVersion
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};
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/************************************************************/
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/* callbacks */
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/************************************************************/
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/* dispatch requests */
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static int
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ProcGEDispatch(ClientPtr client)
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{
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GEClientInfoPtr pGEClient = GEGetClient(client);
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REQUEST(xGEReq);
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if (pGEClient->major_version >= ARRAY_SIZE(version_requests))
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return BadRequest;
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if (stuff->ReqType > version_requests[pGEClient->major_version])
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return BadRequest;
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return (ProcGEVector[stuff->ReqType]) (client);
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}
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/* dispatch swapped requests */
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static int _X_COLD
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SProcGEDispatch(ClientPtr client)
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{
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REQUEST(xGEReq);
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if (stuff->ReqType >= GENumberRequests)
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return BadRequest;
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return (*SProcGEVector[stuff->ReqType]) (client);
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}
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/* Reset extension. Called on server shutdown. */
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static void
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GEResetProc(ExtensionEntry * extEntry)
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{
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EventSwapVector[GenericEvent] = NotImplemented;
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}
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/* Calls the registered event swap function for the extension.
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*
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* Each extension can register a swap function to handle GenericEvents being
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* swapped properly. The server calls SGEGenericEvent() before the event is
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* written on the wire, this one calls the registered swap function to do the
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* work.
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*/
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static void _X_COLD
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SGEGenericEvent(xEvent *from, xEvent *to)
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{
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xGenericEvent *gefrom = (xGenericEvent *) from;
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xGenericEvent *geto = (xGenericEvent *) to;
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if ((gefrom->extension & 0x7f) > MAXEXTENSIONS) {
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ErrorF("GE: Invalid extension offset for event.\n");
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return;
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}
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if (GEExtensions[EXT_MASK(gefrom->extension)].evswap)
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GEExtensions[EXT_MASK(gefrom->extension)].evswap(gefrom, geto);
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}
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/* Init extension, register at server.
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* Since other extensions may rely on XGE (XInput does already), it is a good
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* idea to init XGE first, before any other extension.
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*/
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void
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GEExtensionInit(void)
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{
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ExtensionEntry *extEntry;
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if (!dixRegisterPrivateKey
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(&GEClientPrivateKeyRec, PRIVATE_CLIENT, sizeof(GEClientInfoRec)))
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FatalError("GEExtensionInit: GE private request failed.\n");
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if ((extEntry = AddExtension(GE_NAME,
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0, GENumberErrors,
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ProcGEDispatch, SProcGEDispatch,
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GEResetProc, StandardMinorOpcode)) != 0) {
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memset(GEExtensions, 0, sizeof(GEExtensions));
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EventSwapVector[GenericEvent] = (EventSwapPtr) SGEGenericEvent;
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}
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else {
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FatalError("GEInit: AddExtensions failed.\n");
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}
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}
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/************************************************************/
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/* interface for extensions */
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/************************************************************/
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/* Register an extension with GE. The given swap function will be called each
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* time an event is sent to a client with different byte order.
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* @param extension The extensions major opcode
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* @param ev_swap The event swap function.
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* @param ev_fill Called for an event before delivery. The extension now has
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* the chance to fill in necessary fields for the event.
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*/
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void
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GERegisterExtension(int extension,
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void (*ev_swap) (xGenericEvent *from, xGenericEvent *to))
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{
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if (EXT_MASK(extension) >= MAXEXTENSIONS)
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FatalError("GE: extension > MAXEXTENSIONS. This should not happen.\n");
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/* extension opcodes are > 128, might as well save some space here */
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GEExtensions[EXT_MASK(extension)].evswap = ev_swap;
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}
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/* Sets type and extension field for a generic event. This is just an
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* auxiliary function, extensions could do it manually too.
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*/
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void
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GEInitEvent(xGenericEvent *ev, int extension)
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{
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ev->type = GenericEvent;
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ev->extension = extension;
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ev->length = 0;
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}
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