sys/external/bsd/drm/dist/tests/auth.c

   1 /*
   2  * Copyright © 2007 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 #include <limits.h>
  29 #include "drmtest.h"
  30
  31 enum auth_event {
  32         SERVER_READY,
  33         CLIENT_MAGIC,
  34         CLIENT_DONE,
  35 };
  36
  37 int commfd[2];
  38
  39 static void wait_event(int pipe, enum auth_event expected_event)
  40 {
  41         int ret;
  42         enum auth_event event;
  43         unsigned char in;
  44
  45         ret = read(commfd[pipe], &in, 1);
  46         if (ret == -1)
  47                 err(1, "read error");
  48         event = in;
  49
  50         if (event != expected_event)
  51                 errx(1, "unexpected event: %d\n", event);
  52 }
  53
  54 static void
  55 send_event(int pipe, enum auth_event send_event)
  56 {
  57         int ret;
  58         unsigned char event;
  59
  60         event = send_event;
  61         ret = write(commfd[pipe], &event, 1);
  62         if (ret == -1)
  63                 err(1, "failed to send event %d", event);
  64 }
  65
  66 static void client()
  67 {
  68         struct drm_auth auth;
  69         int drmfd, ret;
  70
  71         /* XXX: Should make sure we open the same DRM as the master */
  72         wait_event(0, SERVER_READY);
  73
  74         drmfd = drm_open_any();
  75
  76         /* Get a client magic number and pass it to the master for auth. */
  77         auth.magic = 0; /* Quiet valgrind */
  78         ret = ioctl(drmfd, DRM_IOCTL_GET_MAGIC, &auth);
  79         if (ret == -1)
  80                 err(1, "Couldn't get client magic");
  81         send_event(0, CLIENT_MAGIC);
  82         ret = write(commfd[0], &auth.magic, sizeof(auth.magic));
  83         if (ret == -1)
  84                 err(1, "Couldn't write auth data");
  85
  86         /* Signal that the client is completely done. */
  87         send_event(0, CLIENT_DONE);
  88 }
  89
  90 static void server()
  91 {
  92         int drmfd, ret;
  93         struct drm_auth auth;
  94
  95         drmfd = drm_open_any_master();
  96
  97         auth.magic = 0xd0d0d0d0;
  98         ret = ioctl(drmfd, DRM_IOCTL_AUTH_MAGIC, &auth);
  99         if (ret != -1 || errno != EINVAL)
 100                 errx(1, "Authenticating bad magic succeeded\n");
 101
 102         send_event(1, SERVER_READY);
 103
 104         wait_event(1, CLIENT_MAGIC);
 105         ret = read(commfd[1], &auth.magic, sizeof(auth.magic));
 106         if (ret == -1)
 107                 err(1, "Failure to read client magic");
 108
 109         ret = ioctl(drmfd, DRM_IOCTL_AUTH_MAGIC, &auth);
 110         if (ret == -1)
 111                 err(1, "Failure to authenticate client magic\n");
 112
 113         wait_event(1, CLIENT_DONE);
 114 }
 115
 116 /**
 117  * Checks DRM authentication mechanisms.
 118  */
 119 int main(int argc, char **argv)
 120 {
 121         int ret;
 122
 123         ret = pipe(commfd);
 124         if (ret == -1)
 125                 err(1, "Couldn't create pipe");
 126
 127         ret = fork();
 128         if (ret == -1)
 129                 err(1, "failure to fork client");
 130         if (ret == 0)
 131                 client();
 132         else
 133                 server();
 134
 135         return 0;
 136 }
 137