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 (at) anholt.net> 25 * 26 */ 27 28 #include <limits.h> 29 #include <sys/ioctl.h> 30 #include "drmtest.h" 31 32 enum auth_event { 33 SERVER_READY, 34 CLIENT_MAGIC, 35 CLIENT_DONE, 36 }; 37 38 int commfd[2]; 39 40 static void wait_event(int pipe, enum auth_event expected_event) 41 { 42 int ret; 43 enum auth_event event; 44 unsigned char in; 45 46 ret = read(commfd[pipe], &in, 1); 47 if (ret == -1) 48 err(1, "read error"); 49 event = in; 50 51 if (event != expected_event) 52 errx(1, "unexpected event: %d\n", event); 53 } 54 55 static void 56 send_event(int pipe, enum auth_event send_event) 57 { 58 int ret; 59 unsigned char event; 60 61 event = send_event; 62 ret = write(commfd[pipe], &event, 1); 63 if (ret == -1) 64 err(1, "failed to send event %d", event); 65 } 66 67 static void client() 68 { 69 struct drm_auth auth; 70 int drmfd, ret; 71 72 /* XXX: Should make sure we open the same DRM as the master */ 73 wait_event(0, SERVER_READY); 74 75 drmfd = drm_open_any(); 76 77 /* Get a client magic number and pass it to the master for auth. */ 78 auth.magic = 0; /* Quiet valgrind */ 79 ret = ioctl(drmfd, DRM_IOCTL_GET_MAGIC, &auth); 80 if (ret == -1) 81 err(1, "Couldn't get client magic"); 82 send_event(0, CLIENT_MAGIC); 83 ret = write(commfd[0], &auth.magic, sizeof(auth.magic)); 84 if (ret == -1) 85 err(1, "Couldn't write auth data"); 86 87 /* Signal that the client is completely done. */ 88 send_event(0, CLIENT_DONE); 89 } 90 91 static void server() 92 { 93 int drmfd, ret; 94 struct drm_auth auth; 95 96 drmfd = drm_open_any_master(); 97 98 auth.magic = 0xd0d0d0d0; 99 ret = ioctl(drmfd, DRM_IOCTL_AUTH_MAGIC, &auth); 100 if (ret != -1 || errno != EINVAL) 101 errx(1, "Authenticating bad magic succeeded\n"); 102 103 send_event(1, SERVER_READY); 104 105 wait_event(1, CLIENT_MAGIC); 106 ret = read(commfd[1], &auth.magic, sizeof(auth.magic)); 107 if (ret == -1) 108 err(1, "Failure to read client magic"); 109 110 ret = ioctl(drmfd, DRM_IOCTL_AUTH_MAGIC, &auth); 111 if (ret == -1) 112 err(1, "Failure to authenticate client magic\n"); 113 114 wait_event(1, CLIENT_DONE); 115 } 116 117 /** 118 * Checks DRM authentication mechanisms. 119 */ 120 int main(int argc, char **argv) 121 { 122 int ret; 123 124 ret = pipe(commfd); 125 if (ret == -1) 126 err(1, "Couldn't create pipe"); 127 128 ret = fork(); 129 if (ret == -1) 130 err(1, "failure to fork client"); 131 if (ret == 0) 132 client(); 133 else 134 server(); 135 136 return 0; 137 } 138 139
