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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5362 | serge | 1 | /* |
| 2 | * Copyright (c) 2012 Intel Corporation. All Rights Reserved. |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the |
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| 6 | * "Software"), to deal in the Software without restriction, including |
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| 7 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 8 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 9 | * permit persons to whom the Software is furnished to do so, subject to |
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| 10 | * the following conditions: |
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| 11 | * |
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| 12 | * The above copyright notice and this permission notice (including the |
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| 13 | * next paragraph) shall be included in all copies or substantial portions |
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| 14 | * of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 17 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 19 | * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 20 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 21 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 22 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | */ |
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| 24 | |||
| 25 | #include "sysdeps.h" |
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| 26 | #include |
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| 27 | #include |
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| 28 | #include "va_drm_auth.h" |
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| 29 | #include "va_drm_auth_x11.h" |
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| 30 | |||
| 31 | #if defined __linux__ |
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| 32 | # include |
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| 33 | #endif |
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| 34 | |||
| 35 | /* Checks whether the thread id is the current thread */ |
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| 36 | static bool |
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| 37 | is_local_tid(pid_t tid) |
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| 38 | { |
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| 39 | #if defined __linux__ |
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| 40 | /* On Linux systems, drmGetClient() would return the thread ID |
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| 41 | instead of the actual process ID */ |
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| 42 | return syscall(SYS_gettid) == tid; |
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| 43 | #else |
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| 44 | return false; |
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| 45 | #endif |
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| 46 | } |
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| 47 | |||
| 48 | /* Checks whether DRM connection is authenticated */ |
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| 49 | bool |
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| 50 | va_drm_is_authenticated(int fd) |
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| 51 | { |
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| 52 | pid_t client_pid; |
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| 53 | int i, auth, pid, uid; |
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| 54 | unsigned long magic, iocs; |
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| 55 | bool is_authenticated = false; |
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| 56 | |||
| 57 | client_pid = getpid(); |
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| 58 | for (i = 0; !is_authenticated; i++) { |
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| 59 | if (drmGetClient(fd, i, &auth, &pid, &uid, &magic, &iocs) != 0) |
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| 60 | break; |
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| 61 | is_authenticated = auth && (pid == client_pid || is_local_tid(pid)); |
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| 62 | } |
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| 63 | return is_authenticated; |
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| 64 | } |
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| 65 | |||
| 66 | /* Try to authenticate the DRM connection with the supplied magic id */ |
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| 67 | bool |
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| 68 | va_drm_authenticate(int fd, uint32_t magic) |
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| 69 | { |
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| 70 | /* XXX: try to authenticate through Wayland, etc. */ |
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| 71 | #ifdef HAVE_VA_X11 |
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| 72 | if (va_drm_authenticate_x11(fd, magic)) |
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| 73 | return true; |
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| 74 | #endif |
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| 75 | |||
| 76 | /* Default: root + master privs are needed for the following call */ |
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| 77 | return drmAuthMagic(fd, magic) == 0; |
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| 78 | } |