1 /*
2 * Copyright © 2011 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23 #ifdef HAVE_DIX_CONFIG_H
24 #include <dix-config.h>
25 #endif
26
27 #include "glxserver.h"
28 #include "indirect_dispatch.h"
29 #include "glxbyteorder.h"
30 #include "unpack.h"
31
32 static int
set_client_info(__GLXclientState * cl,xGLXSetClientInfoARBReq * req,unsigned bytes_per_version)33 set_client_info(__GLXclientState * cl, xGLXSetClientInfoARBReq * req,
34 unsigned bytes_per_version)
35 {
36 ClientPtr client = cl->client;
37 char *gl_extensions;
38 char *glx_extensions;
39 int size;
40
41 REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
42
43 /* Verify that the size of the packet matches the size inferred from the
44 * sizes specified for the various fields.
45 */
46 size = sz_xGLXSetClientInfoARBReq;
47 size = safe_add(size, safe_mul(req->numVersions, bytes_per_version));
48 size = safe_add(size, safe_pad(req->numGLExtensionBytes));
49 size = safe_add(size, safe_pad(req->numGLXExtensionBytes));
50
51 if (size < 0 || req->length != (size / 4))
52 return BadLength;
53
54 /* Verify that the actual length of the GL extension string matches what's
55 * encoded in protocol packet.
56 */
57 gl_extensions = (char *) (req + 1) + (req->numVersions * bytes_per_version);
58 if (req->numGLExtensionBytes != 0
59 && memchr(gl_extensions, 0,
60 __GLX_PAD(req->numGLExtensionBytes)) == NULL)
61 return BadLength;
62
63 /* Verify that the actual length of the GLX extension string matches
64 * what's encoded in protocol packet.
65 */
66 glx_extensions = gl_extensions + __GLX_PAD(req->numGLExtensionBytes);
67 if (req->numGLXExtensionBytes != 0
68 && memchr(glx_extensions, 0,
69 __GLX_PAD(req->numGLXExtensionBytes)) == NULL)
70 return BadLength;
71
72 free(cl->GLClientextensions);
73 cl->GLClientextensions = strdup(gl_extensions);
74
75 return 0;
76 }
77
78 int
__glXDisp_SetClientInfoARB(__GLXclientState * cl,GLbyte * pc)79 __glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
80 {
81 return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 8);
82 }
83
84 int
__glXDispSwap_SetClientInfoARB(__GLXclientState * cl,GLbyte * pc)85 __glXDispSwap_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
86 {
87 ClientPtr client = cl->client;
88 xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
89
90 REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
91
92 req->length = bswap_16(req->length);
93 req->numVersions = bswap_32(req->numVersions);
94 req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes);
95 req->numGLXExtensionBytes = bswap_32(req->numGLXExtensionBytes);
96
97 return __glXDisp_SetClientInfoARB(cl, pc);
98 }
99
100 int
__glXDisp_SetClientInfo2ARB(__GLXclientState * cl,GLbyte * pc)101 __glXDisp_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
102 {
103 return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 12);
104 }
105
106 int
__glXDispSwap_SetClientInfo2ARB(__GLXclientState * cl,GLbyte * pc)107 __glXDispSwap_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
108 {
109 ClientPtr client = cl->client;
110 xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
111
112 REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
113
114 req->length = bswap_16(req->length);
115 req->numVersions = bswap_32(req->numVersions);
116 req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes);
117 req->numGLXExtensionBytes = bswap_32(req->numGLXExtensionBytes);
118
119 return __glXDisp_SetClientInfo2ARB(cl, pc);
120 }
121