diff options
Diffstat (limited to 'xorg-server/dix/extension.c')
| -rw-r--r-- | xorg-server/dix/extension.c | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/xorg-server/dix/extension.c b/xorg-server/dix/extension.c new file mode 100644 index 000000000..9740c1b50 --- /dev/null +++ b/xorg-server/dix/extension.c @@ -0,0 +1,356 @@ +/*********************************************************** + +Copyright 1987, 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. + + +Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of Digital not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +******************************************************************/ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include <X11/X.h> +#define NEED_EVENTS +#define NEED_REPLIES +#include <X11/Xproto.h> +#include "misc.h" +#include "dixstruct.h" +#include "extnsionst.h" +#include "gcstruct.h" +#include "scrnintstr.h" +#include "dispatch.h" +#include "privates.h" +#include "registry.h" +#include "xace.h" + +#define EXTENSION_BASE 128 +#define EXTENSION_EVENT_BASE 64 +#define LAST_EVENT 128 +#define LAST_ERROR 255 + +static ExtensionEntry **extensions = (ExtensionEntry **)NULL; + +int lastEvent = EXTENSION_EVENT_BASE; +static int lastError = FirstExtensionError; +static unsigned int NumExtensions = 0; + +_X_EXPORT ExtensionEntry * +AddExtension(char *name, int NumEvents, int NumErrors, + int (*MainProc)(ClientPtr c1), + int (*SwappedMainProc)(ClientPtr c2), + void (*CloseDownProc)(ExtensionEntry *e), + unsigned short (*MinorOpcodeProc)(ClientPtr c3)) +{ + int i; + ExtensionEntry *ext, **newexts; + + if (!MainProc || !SwappedMainProc || !CloseDownProc || !MinorOpcodeProc) + return((ExtensionEntry *) NULL); + if ((lastEvent + NumEvents > LAST_EVENT) || + (unsigned)(lastError + NumErrors > LAST_ERROR)) + return((ExtensionEntry *) NULL); + + ext = (ExtensionEntry *) xalloc(sizeof(ExtensionEntry)); + if (!ext) + return((ExtensionEntry *) NULL); + ext->name = (char *)xalloc(strlen(name) + 1); + ext->num_aliases = 0; + ext->aliases = (char **)NULL; + ext->devPrivates = NULL; + if (!ext->name) + { + xfree(ext); + return((ExtensionEntry *) NULL); + } + strcpy(ext->name, name); + i = NumExtensions; + newexts = (ExtensionEntry **) xrealloc(extensions, + (i + 1) * sizeof(ExtensionEntry *)); + if (!newexts) + { + xfree(ext->name); + xfree(ext); + return((ExtensionEntry *) NULL); + } + NumExtensions++; + extensions = newexts; + extensions[i] = ext; + ext->index = i; + ext->base = i + EXTENSION_BASE; + ext->CloseDown = CloseDownProc; + ext->MinorOpcode = MinorOpcodeProc; + ProcVector[i + EXTENSION_BASE] = MainProc; + SwappedProcVector[i + EXTENSION_BASE] = SwappedMainProc; + if (NumEvents) + { + ext->eventBase = lastEvent; + ext->eventLast = lastEvent + NumEvents; + lastEvent += NumEvents; + } + else + { + ext->eventBase = 0; + ext->eventLast = 0; + } + if (NumErrors) + { + ext->errorBase = lastError; + ext->errorLast = lastError + NumErrors; + lastError += NumErrors; + } + else + { + ext->errorBase = 0; + ext->errorLast = 0; + } + + RegisterExtensionNames(ext); + return(ext); +} + +_X_EXPORT Bool AddExtensionAlias(char *alias, ExtensionEntry *ext) +{ + char *name; + char **aliases; + + if (!ext) + return FALSE ; + aliases = (char **)xrealloc(ext->aliases, + (ext->num_aliases + 1) * sizeof(char *)); + if (!aliases) + return FALSE; + ext->aliases = aliases; + name = (char *)xalloc(strlen(alias) + 1); + if (!name) + return FALSE; + strcpy(name, alias); + ext->aliases[ext->num_aliases] = name; + ext->num_aliases++; + return TRUE; +} + +static int +FindExtension(char *extname, int len) +{ + int i, j; + + for (i=0; i<NumExtensions; i++) + { + if ((strlen(extensions[i]->name) == len) && + !strncmp(extname, extensions[i]->name, len)) + break; + for (j = extensions[i]->num_aliases; --j >= 0;) + { + if ((strlen(extensions[i]->aliases[j]) == len) && + !strncmp(extname, extensions[i]->aliases[j], len)) + break; + } + if (j >= 0) break; + } + return ((i == NumExtensions) ? -1 : i); +} + +/* + * CheckExtension returns the extensions[] entry for the requested + * extension name. Maybe this could just return a Bool instead? + */ +_X_EXPORT ExtensionEntry * +CheckExtension(const char *extname) +{ + int n; + + n = FindExtension((char*)extname, strlen(extname)); + if (n != -1) + return extensions[n]; + else + return NULL; +} + +/* + * Added as part of Xace. + */ +ExtensionEntry * +GetExtensionEntry(int major) +{ + if (major < EXTENSION_BASE) + return NULL; + major -= EXTENSION_BASE; + if (major >= NumExtensions) + return NULL; + return extensions[major]; +} + +_X_EXPORT unsigned short +StandardMinorOpcode(ClientPtr client) +{ + return ((xReq *)client->requestBuffer)->data; +} + +_X_EXPORT unsigned short +MinorOpcodeOfRequest(ClientPtr client) +{ + unsigned char major; + + major = ((xReq *)client->requestBuffer)->reqType; + if (major < EXTENSION_BASE) + return 0; + major -= EXTENSION_BASE; + if (major >= NumExtensions) + return 0; + return (*extensions[major]->MinorOpcode)(client); +} + +void +CloseDownExtensions(void) +{ + int i,j; + + for (i = NumExtensions - 1; i >= 0; i--) + { + (* extensions[i]->CloseDown)(extensions[i]); + NumExtensions = i; + xfree(extensions[i]->name); + for (j = extensions[i]->num_aliases; --j >= 0;) + xfree(extensions[i]->aliases[j]); + xfree(extensions[i]->aliases); + dixFreePrivates(extensions[i]->devPrivates); + xfree(extensions[i]); + } + xfree(extensions); + extensions = (ExtensionEntry **)NULL; + lastEvent = EXTENSION_EVENT_BASE; + lastError = FirstExtensionError; +} + +int +ProcQueryExtension(ClientPtr client) +{ + xQueryExtensionReply reply; + int i; + REQUEST(xQueryExtensionReq); + + REQUEST_FIXED_SIZE(xQueryExtensionReq, stuff->nbytes); + + reply.type = X_Reply; + reply.length = 0; + reply.major_opcode = 0; + reply.sequenceNumber = client->sequence; + + if ( ! NumExtensions ) + reply.present = xFalse; + else + { + i = FindExtension((char *)&stuff[1], stuff->nbytes); + if (i < 0 || XaceHook(XACE_EXT_ACCESS, client, extensions[i])) + reply.present = xFalse; + else + { + reply.present = xTrue; + reply.major_opcode = extensions[i]->base; + reply.first_event = extensions[i]->eventBase; + reply.first_error = extensions[i]->errorBase; + } + } + WriteReplyToClient(client, sizeof(xQueryExtensionReply), &reply); + return(client->noClientException); +} + +int +ProcListExtensions(ClientPtr client) +{ + xListExtensionsReply reply; + char *bufptr, *buffer; + int total_length = 0; + + REQUEST_SIZE_MATCH(xReq); + + reply.type = X_Reply; + reply.nExtensions = 0; + reply.length = 0; + reply.sequenceNumber = client->sequence; + buffer = NULL; + + if ( NumExtensions ) + { + int i, j; + + for (i=0; i<NumExtensions; i++) + { + /* call callbacks to find out whether to show extension */ + if (XaceHook(XACE_EXT_ACCESS, client, extensions[i]) != Success) + continue; + + total_length += strlen(extensions[i]->name) + 1; + reply.nExtensions += 1 + extensions[i]->num_aliases; + for (j = extensions[i]->num_aliases; --j >= 0;) + total_length += strlen(extensions[i]->aliases[j]) + 1; + } + reply.length = (total_length + 3) >> 2; + buffer = bufptr = (char *)xalloc(total_length); + if (!buffer) + return(BadAlloc); + for (i=0; i<NumExtensions; i++) + { + int len; + if (XaceHook(XACE_EXT_ACCESS, client, extensions[i]) != Success) + continue; + + *bufptr++ = len = strlen(extensions[i]->name); + memmove(bufptr, extensions[i]->name, len); + bufptr += len; + for (j = extensions[i]->num_aliases; --j >= 0;) + { + *bufptr++ = len = strlen(extensions[i]->aliases[j]); + memmove(bufptr, extensions[i]->aliases[j], len); + bufptr += len; + } + } + } + WriteReplyToClient(client, sizeof(xListExtensionsReply), &reply); + if (reply.length) + { + WriteToClient(client, total_length, buffer); + xfree(buffer); + } + return(client->noClientException); +} |