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6bd673ab15
The reply struct's size can safely be determined by the sizeof() operator, so no need for using an extra define here. Making the code easier to read and also open the door for future convenience macros that might determine the buffer size on their own. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1665>
118 lines
4 KiB
C
118 lines
4 KiB
C
/*
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* Copyright © 2011 Intel Corporation
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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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#include <dix-config.h>
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#include "misc.h"
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#include "glxserver.h"
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#include "indirect_dispatch.h"
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#include "unpack.h"
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static int
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set_client_info(__GLXclientState * cl, xGLXSetClientInfoARBReq * req,
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unsigned bytes_per_version)
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{
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ClientPtr client = cl->client;
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char *gl_extensions;
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char *glx_extensions;
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int size;
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REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
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/* Verify that the size of the packet matches the size inferred from the
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* sizes specified for the various fields.
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*/
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size = sizeof(xGLXSetClientInfoARBReq);
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size = safe_add(size, safe_mul(req->numVersions, bytes_per_version));
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size = safe_add(size, safe_pad(req->numGLExtensionBytes));
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size = safe_add(size, safe_pad(req->numGLXExtensionBytes));
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if (size < 0 || req->length != (size / 4))
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return BadLength;
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/* Verify that the actual length of the GL extension string matches what's
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* encoded in protocol packet.
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*/
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gl_extensions = (char *) (req + 1) + (req->numVersions * bytes_per_version);
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if (req->numGLExtensionBytes != 0
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&& memchr(gl_extensions, 0,
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__GLX_PAD(req->numGLExtensionBytes)) == NULL)
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return BadLength;
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/* Verify that the actual length of the GLX extension string matches
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* what's encoded in protocol packet.
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*/
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glx_extensions = gl_extensions + __GLX_PAD(req->numGLExtensionBytes);
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if (req->numGLXExtensionBytes != 0
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&& memchr(glx_extensions, 0,
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__GLX_PAD(req->numGLXExtensionBytes)) == NULL)
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return BadLength;
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free(cl->GLClientextensions);
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cl->GLClientextensions = strdup(gl_extensions);
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return 0;
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}
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int
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__glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
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{
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return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 8);
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}
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int
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__glXDispSwap_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
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{
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ClientPtr client = cl->client;
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xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
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REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
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req->length = bswap_16(req->length);
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req->numVersions = bswap_32(req->numVersions);
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req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes);
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req->numGLXExtensionBytes = bswap_32(req->numGLXExtensionBytes);
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return __glXDisp_SetClientInfoARB(cl, pc);
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}
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int
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__glXDisp_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
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{
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return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 12);
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}
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int
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__glXDispSwap_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
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{
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ClientPtr client = cl->client;
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xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
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REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
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req->length = bswap_16(req->length);
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req->numVersions = bswap_32(req->numVersions);
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req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes);
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req->numGLXExtensionBytes = bswap_32(req->numGLXExtensionBytes);
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return __glXDisp_SetClientInfo2ARB(cl, pc);
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}
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