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a09e091a JB |
1 | /* |
2 | * Copyright © 2009 Red Hat, Inc. | |
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 | * Authors: Peter Hutterer | |
24 | * | |
25 | */ | |
26 | ||
27 | /** | |
28 | * @file xiqueryversion.c | |
29 | * Protocol handling for the XIQueryVersion request/reply. | |
30 | */ | |
31 | ||
32 | #ifdef HAVE_DIX_CONFIG_H | |
33 | #include <dix-config.h> | |
34 | #endif | |
35 | ||
36 | #include "inputstr.h" | |
37 | ||
38 | #include <X11/Xmd.h> | |
39 | #include <X11/X.h> | |
40 | #include <X11/extensions/XI2proto.h> | |
41 | ||
42 | #include "exglobals.h" | |
43 | #include "exevents.h" | |
44 | #include "xiqueryversion.h" | |
45 | #include "misc.h" | |
46 | ||
47 | extern XExtensionVersion XIVersion; /* defined in getvers.c */ | |
48 | ||
49 | /** | |
50 | * Return the supported XI version. | |
51 | * | |
52 | * Saves the version the client claims to support as well, for future | |
53 | * reference. | |
54 | */ | |
55 | int | |
56 | ProcXIQueryVersion(ClientPtr client) | |
57 | { | |
58 | xXIQueryVersionReply rep; | |
59 | XIClientPtr pXIClient; | |
60 | int major, minor; | |
61 | ||
62 | REQUEST(xXIQueryVersionReq); | |
63 | REQUEST_SIZE_MATCH(xXIQueryVersionReq); | |
64 | ||
65 | /* This request only exists after XI2 */ | |
66 | if (stuff->major_version < 2) { | |
67 | client->errorValue = stuff->major_version; | |
68 | return BadValue; | |
69 | } | |
70 | ||
71 | pXIClient = dixLookupPrivate(&client->devPrivates, XIClientPrivateKey); | |
72 | ||
73 | if (version_compare(XIVersion.major_version, XIVersion.minor_version, | |
74 | stuff->major_version, stuff->minor_version) > 0) { | |
75 | major = stuff->major_version; | |
76 | minor = stuff->minor_version; | |
77 | } else { | |
78 | major = XIVersion.major_version; | |
79 | minor = XIVersion.minor_version; | |
80 | } | |
81 | ||
82 | if (pXIClient->major_version) { | |
83 | ||
84 | /* Check to see if the client has only ever asked | |
85 | * for version 2.2 or higher | |
86 | */ | |
87 | if (version_compare(major, minor, 2, 2) >= 0 && | |
88 | version_compare(pXIClient->major_version, pXIClient->minor_version, 2, 2) >= 0) | |
89 | { | |
90 | ||
91 | /* As of version 2.2, Peter promises to never again break | |
92 | * backward compatibility, so we'll return the requested | |
93 | * version to the client but leave the server internal | |
94 | * version set to the highest requested value | |
95 | */ | |
96 | if (version_compare(major, minor, | |
97 | pXIClient->major_version, pXIClient->minor_version) > 0) | |
98 | { | |
99 | pXIClient->major_version = major; | |
100 | pXIClient->minor_version = minor; | |
101 | } | |
102 | } else { | |
103 | if (version_compare(major, minor, | |
104 | pXIClient->major_version, pXIClient->minor_version) < 0) { | |
105 | ||
106 | client->errorValue = stuff->major_version; | |
107 | return BadValue; | |
108 | } | |
109 | major = pXIClient->major_version; | |
110 | minor = pXIClient->minor_version; | |
111 | } | |
112 | } else { | |
113 | pXIClient->major_version = major; | |
114 | pXIClient->minor_version = minor; | |
115 | } | |
116 | ||
117 | rep = (xXIQueryVersionReply) { | |
118 | .repType = X_Reply, | |
119 | .RepType = X_XIQueryVersion, | |
120 | .sequenceNumber = client->sequence, | |
121 | .length = 0, | |
122 | .major_version = major, | |
123 | .minor_version = minor | |
124 | }; | |
125 | ||
126 | WriteReplyToClient(client, sizeof(xXIQueryVersionReply), &rep); | |
127 | ||
128 | return Success; | |
129 | } | |
130 | ||
131 | /* Swapping routines */ | |
132 | ||
133 | int | |
134 | SProcXIQueryVersion(ClientPtr client) | |
135 | { | |
136 | REQUEST(xXIQueryVersionReq); | |
137 | swaps(&stuff->length); | |
138 | REQUEST_AT_LEAST_SIZE(xXIQueryVersionReq); | |
139 | swaps(&stuff->major_version); | |
140 | swaps(&stuff->minor_version); | |
141 | return (ProcXIQueryVersion(client)); | |
142 | } | |
143 | ||
144 | void | |
145 | SRepXIQueryVersion(ClientPtr client, int size, xXIQueryVersionReply * rep) | |
146 | { | |
147 | swaps(&rep->sequenceNumber); | |
148 | swapl(&rep->length); | |
149 | swaps(&rep->major_version); | |
150 | swaps(&rep->minor_version); | |
151 | WriteToClient(client, size, rep); | |
152 | } |