git.ozlabs.org Git - petitboot/blob - ui/common/discover-client.c

   1
   2 #if defined(HAVE_CONFIG_H)
   3 #include "config.h"
   4 #endif
   5
   6 #include <assert.h>
   7 #include <errno.h>
   8 #include <unistd.h>
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11 #include <stdint.h>
  12 #include <string.h>
  13
  14 #include <sys/socket.h>
  15 #include <sys/un.h>
  16 #include <asm/byteorder.h>
  17
  18 #include <talloc/talloc.h>
  19 #include <log/log.h>
  20
  21 #include "discover-client.h"
  22 #include "pb-protocol/pb-protocol.h"
  23
  24 struct discover_client {
  25         int fd;
  26         struct discover_client_ops ops;
  27         int n_devices;
  28         struct device **devices;
  29         bool authenticated;
  30 };
  31
  32 static int discover_client_destructor(void *arg)
  33 {
  34         struct discover_client *client = arg;
  35
  36         if (client->fd >= 0)
  37                 close(client->fd);
  38
  39         return 0;
  40 }
  41
  42 void discover_client_destroy(struct discover_client *client)
  43 {
  44         talloc_free(client);
  45 }
  46
  47 static struct device *find_device(struct discover_client *client,
  48                 const char *id)
  49 {
  50         int i;
  51
  52         for (i = 0; i < client->n_devices; i++) {
  53                 struct device *dev = client->devices[i];
  54                 if (!strcmp(dev->id, id))
  55                         return dev;
  56         }
  57
  58         return NULL;
  59 }
  60
  61 static void device_add(struct discover_client *client, struct device *device)
  62 {
  63         client->n_devices++;
  64         client->devices = talloc_realloc(client, client->devices,
  65                         struct device *, client->n_devices);
  66
  67         client->devices[client->n_devices - 1] = device;
  68         talloc_steal(client, device);
  69         list_init(&device->boot_options);
  70
  71         if (client->ops.device_add)
  72                 client->ops.device_add(device, client->ops.cb_arg);
  73 }
  74
  75 static void boot_option_add(struct discover_client *client,
  76                 struct boot_option *opt)
  77 {
  78         struct device *dev;
  79
  80         dev = find_device(client, opt->device_id);
  81
  82         /* we require that devices are already present before any boot options
  83          * are added */
  84         assert(dev);
  85
  86         talloc_steal(dev, opt);
  87         list_add(&dev->boot_options, &opt->list);
  88
  89         if (client->ops.boot_option_add)
  90                 client->ops.boot_option_add(dev, opt, client->ops.cb_arg);
  91 }
  92
  93 static void device_remove(struct discover_client *client, const char *id)
  94 {
  95         struct device *device = NULL;
  96         int i;
  97
  98         for (i = 0; i < client->n_devices; i++) {
  99                 if (!strcmp(client->devices[i]->id, id)) {
 100                         device = client->devices[i];
 101                         break;
 102                 }
 103         }
 104
 105         if (!device)
 106                 return;
 107
 108         /* remove the device from the client's device array */
 109         client->n_devices--;
 110         memmove(&client->devices[i], &client->devices[i+1],
 111                         (client->n_devices - i) * sizeof(client->devices[0]));
 112         client->devices = talloc_realloc(client, client->devices,
 113                         struct device *, client->n_devices);
 114
 115         /* notify the UI */
 116         client->ops.device_remove(device, client->ops.cb_arg);
 117
 118         talloc_free(device);
 119 }
 120
 121 static void plugin_option_add(struct discover_client *client,
 122                 struct plugin_option *opt)
 123 {
 124         talloc_steal(client, opt);
 125
 126         if (client->ops.plugin_option_add)
 127                 client->ops.plugin_option_add(opt, client->ops.cb_arg);
 128 }
 129
 130 static void plugins_remove(struct discover_client *client)
 131 {
 132         if (client->ops.plugins_remove)
 133                 client->ops.plugins_remove(client->ops.cb_arg);
 134 }
 135
 136 void discover_client_enumerate(struct discover_client *client)
 137 {
 138         struct boot_option *opt;
 139         struct device *device;
 140         int i;
 141
 142         for (i = 0; i < client->n_devices; i++) {
 143                 device = client->devices[i];
 144                 if (client->ops.device_add)
 145                         client->ops.device_add(device, client->ops.cb_arg);
 146
 147                 list_for_each_entry(&device->boot_options, opt, list)
 148                         if (client->ops.boot_option_add)
 149                                 client->ops.boot_option_add(device, opt,
 150                                                 client->ops.cb_arg);
 151         }
 152 }
 153
 154 static void update_status(struct discover_client *client,
 155                 struct status *status)
 156 {
 157         if (client->ops.update_status)
 158                 client->ops.update_status(status, client->ops.cb_arg);
 159 }
 160
 161 static void update_sysinfo(struct discover_client *client,
 162                 struct system_info *sysinfo)
 163 {
 164         if (client->ops.update_sysinfo)
 165                 client->ops.update_sysinfo(sysinfo, client->ops.cb_arg);
 166 }
 167
 168 static void update_config(struct discover_client *client,
 169                 struct config *config)
 170 {
 171         if (client->ops.update_config)
 172                 client->ops.update_config(config, client->ops.cb_arg);
 173 }
 174
 175 static int discover_client_process(void *arg)
 176 {
 177         struct discover_client *client = arg;
 178         struct pb_protocol_message *message;
 179         struct auth_message *auth_msg;
 180         struct plugin_option *p_opt;
 181         struct system_info *sysinfo;
 182         struct boot_option *opt;
 183         struct status *status;
 184         struct config *config;
 185         struct device *dev;
 186         char *dev_id;
 187         void *ctx;
 188         int rc;
 189
 190         /* We use a temporary context for processing one message; persistent
 191          * data is re-parented to the client in the callbacks. */
 192         ctx = talloc_new(client);
 193
 194         message = pb_protocol_read_message(ctx, client->fd);
 195
 196         if (!message)
 197                 return -1;
 198
 199         switch (message->action) {
 200         case PB_PROTOCOL_ACTION_DEVICE_ADD:
 201                 dev = talloc_zero(ctx, struct device);
 202                 list_init(&dev->boot_options);
 203
 204                 rc = pb_protocol_deserialise_device(dev, message);
 205                 if (rc) {
 206                         pb_log_fn("no device?\n");
 207                         goto out;
 208                 }
 209
 210                 device_add(client, dev);
 211                 break;
 212         case PB_PROTOCOL_ACTION_BOOT_OPTION_ADD:
 213                 opt = talloc_zero(ctx, struct boot_option);
 214
 215                 rc = pb_protocol_deserialise_boot_option(opt, message);
 216                 if (rc) {
 217                         pb_log_fn("no boot_option?\n");
 218                         goto out;
 219                 }
 220
 221                 boot_option_add(client, opt);
 222                 break;
 223         case PB_PROTOCOL_ACTION_DEVICE_REMOVE:
 224                 dev_id = pb_protocol_deserialise_string(ctx, message);
 225                 if (!dev_id) {
 226                         pb_log_fn("no device id?\n");
 227                         goto out;
 228                 }
 229                 device_remove(client, dev_id);
 230                 break;
 231         case PB_PROTOCOL_ACTION_STATUS:
 232                 status = talloc_zero(ctx, struct status);
 233
 234                 rc = pb_protocol_deserialise_boot_status(status, message);
 235                 if (rc) {
 236                         pb_log_fn("invalid status message?\n");
 237                         goto out;
 238                 }
 239                 update_status(client, status);
 240                 break;
 241         case PB_PROTOCOL_ACTION_SYSTEM_INFO:
 242                 sysinfo = talloc_zero(ctx, struct system_info);
 243
 244                 rc = pb_protocol_deserialise_system_info(sysinfo, message);
 245                 if (rc) {
 246                         pb_log_fn("invalid sysinfo message?\n");
 247                         goto out;
 248                 }
 249                 update_sysinfo(client, sysinfo);
 250                 break;
 251         case PB_PROTOCOL_ACTION_CONFIG:
 252                 config = talloc_zero(ctx, struct config);
 253
 254                 rc = pb_protocol_deserialise_config(config, message);
 255                 if (rc) {
 256                         pb_log_fn("invalid config message?\n");
 257                         goto out;
 258                 }
 259                 update_config(client, config);
 260                 break;
 261         case PB_PROTOCOL_ACTION_PLUGIN_OPTION_ADD:
 262                 p_opt = talloc_zero(ctx, struct plugin_option);
 263
 264                 rc = pb_protocol_deserialise_plugin_option(p_opt, message);
 265                 if (rc) {
 266                         pb_log_fn("no plugin_option?\n");
 267                         goto out;
 268                 }
 269
 270                 plugin_option_add(client, p_opt);
 271                 break;
 272         case PB_PROTOCOL_ACTION_PLUGINS_REMOVE:
 273                 plugins_remove(client);
 274                 break;
 275         case PB_PROTOCOL_ACTION_AUTHENTICATE:
 276                 auth_msg = talloc_zero(ctx, struct auth_message);
 277
 278                 rc = pb_protocol_deserialise_authenticate(auth_msg, message);
 279                 if (rc || auth_msg->op != AUTH_MSG_RESPONSE) {
 280                         pb_log("%s: invalid auth message? (%d)\n",
 281                                         __func__, rc);
 282                         goto out;
 283                 }
 284
 285                 pb_log("Client %sauthenticated by server\n",
 286                                 client->authenticated ? "" : "un");
 287                 client->authenticated = auth_msg->authenticated;
 288                 break;
 289         default:
 290                 pb_log_fn("unknown action %d\n", message->action);
 291         }
 292
 293 out:
 294         talloc_free(ctx);
 295
 296         return 0;
 297 }
 298
 299 struct discover_client* discover_client_init(struct waitset *waitset,
 300         const struct discover_client_ops *ops, void *cb_arg)
 301 {
 302         struct discover_client *client;
 303         struct sockaddr_un addr;
 304
 305         client = talloc(NULL, struct discover_client);
 306         if (!client)
 307                 return NULL;
 308
 309         memcpy(&client->ops, ops, sizeof(client->ops));
 310         client->ops.cb_arg = cb_arg;
 311
 312         client->fd = socket(AF_UNIX, SOCK_STREAM, 0);
 313         if (client->fd < 0) {
 314                 pb_log_fn("socket: %s\n", strerror(errno));
 315                 goto out_err;
 316         }
 317
 318         talloc_set_destructor(client, discover_client_destructor);
 319
 320         client->n_devices = 0;
 321         client->devices = NULL;
 322
 323         addr.sun_family = AF_UNIX;
 324         strcpy(addr.sun_path, PB_SOCKET_PATH);
 325
 326         if (connect(client->fd, (struct sockaddr *)&addr, sizeof(addr))) {
 327                 pb_log_fn("connect: %s\n", strerror(errno));
 328                 goto out_err;
 329         }
 330
 331         waiter_register_io(waitset, client->fd, WAIT_IN,
 332                         discover_client_process, client);
 333
 334         /* Assume this client can't make changes if crypt support is enabled */
 335 #ifdef CRYPT_SUPPORT
 336         client->authenticated = false;
 337 #else
 338         client->authenticated = true;
 339 #endif
 340
 341         return client;
 342
 343 out_err:
 344         talloc_free(client);
 345         return NULL;
 346 }
 347
 348 /* accessors for discovered devices */
 349 int discover_client_device_count(struct discover_client *client)
 350 {
 351         return client->n_devices;
 352 }
 353
 354 struct device *discover_client_get_device(struct discover_client *client,
 355                 int index)
 356 {
 357         if (index < 0 || index >= client->n_devices)
 358                 return NULL;
 359
 360         return client->devices[index];
 361 }
 362
 363 bool discover_client_authenticated(struct discover_client *client)
 364 {
 365         return client->authenticated;
 366 }
 367
 368 static void create_boot_command(struct boot_command *command,
 369                 const struct device *device __attribute__((unused)),
 370                 const struct boot_option *boot_option,
 371                 const struct pb_boot_data *data)
 372 {
 373         command->option_id = boot_option ? boot_option->id : NULL;
 374         command->boot_image_file = data->image;
 375         command->initrd_file = data->initrd;
 376         command->dtb_file = data->dtb;
 377         command->boot_args = data->args;
 378         command->args_sig_file = data->args_sig_file;
 379         command->console = ttyname(STDIN_FILENO);
 380 }
 381
 382 int discover_client_boot(struct discover_client *client,
 383                 const struct device *device,
 384                 const struct boot_option *boot_option,
 385                 const struct pb_boot_data *data)
 386 {
 387         struct pb_protocol_message *message;
 388         struct boot_command boot_command;
 389         int len, rc;
 390
 391         create_boot_command(&boot_command, device, boot_option, data);
 392
 393         len = pb_protocol_boot_len(&boot_command);
 394
 395         message = pb_protocol_create_message(client,
 396                         PB_PROTOCOL_ACTION_BOOT, len);
 397
 398         if (!message)
 399                 return -1;
 400
 401         pb_protocol_serialise_boot_command(&boot_command,
 402                         message->payload, len);
 403
 404         rc = pb_protocol_write_message(client->fd, message);
 405
 406         return rc;
 407 }
 408
 409 int discover_client_cancel_default(struct discover_client *client)
 410 {
 411         struct pb_protocol_message *message;
 412
 413         message = pb_protocol_create_message(client,
 414                         PB_PROTOCOL_ACTION_CANCEL_DEFAULT, 0);
 415
 416         if (!message)
 417                 return -1;
 418
 419         return pb_protocol_write_message(client->fd, message);
 420 }
 421
 422 int discover_client_send_reinit(struct discover_client *client)
 423 {
 424         struct pb_protocol_message *message;
 425
 426         message = pb_protocol_create_message(client,
 427                         PB_PROTOCOL_ACTION_REINIT, 0);
 428
 429         if (!message)
 430                 return -1;
 431
 432         return pb_protocol_write_message(client->fd, message);
 433 }
 434
 435 int discover_client_send_config(struct discover_client *client,
 436                 struct config *config)
 437 {
 438         struct pb_protocol_message *message;
 439         int len;
 440
 441         len = pb_protocol_config_len(config);
 442
 443         message = pb_protocol_create_message(client,
 444                                 PB_PROTOCOL_ACTION_CONFIG, len);
 445         if (!message)
 446                 return -1;
 447
 448         pb_protocol_serialise_config(config, message->payload, len);
 449
 450         return pb_protocol_write_message(client->fd, message);
 451 }
 452
 453 int discover_client_send_url(struct discover_client *client,
 454                 char *url)
 455 {
 456         struct pb_protocol_message *message;
 457         int len;
 458
 459         len = pb_protocol_url_len(url);
 460
 461         message = pb_protocol_create_message(client,
 462                                 PB_PROTOCOL_ACTION_ADD_URL, len);
 463         if (!message)
 464                 return -1;
 465
 466         pb_protocol_serialise_url(url, message->payload, len);
 467
 468         return pb_protocol_write_message(client->fd, message);
 469 }
 470
 471 int discover_client_send_plugin_install(struct discover_client *client,
 472                 char *file)
 473 {
 474         struct pb_protocol_message *message;
 475         int len;
 476
 477         len = pb_protocol_url_len(file);
 478
 479         message = pb_protocol_create_message(client,
 480                                 PB_PROTOCOL_ACTION_PLUGIN_INSTALL, len);
 481         if (!message)
 482                 return -1;
 483
 484         pb_protocol_serialise_url(file, message->payload, len);
 485
 486         return pb_protocol_write_message(client->fd, message);
 487 }
 488
 489 int discover_client_send_temp_autoboot(struct discover_client *client,
 490                 const struct autoboot_option *opt)
 491 {
 492         struct pb_protocol_message *message;
 493         int len;
 494
 495         len = pb_protocol_temp_autoboot_len(opt);
 496
 497         message = pb_protocol_create_message(client,
 498                         PB_PROTOCOL_ACTION_TEMP_AUTOBOOT, len);
 499         if (!message)
 500                 return -1;
 501
 502         pb_protocol_serialise_temp_autoboot(opt, message->payload, len);
 503
 504         return pb_protocol_write_message(client->fd, message);
 505 }
 506
 507 int discover_client_send_authenticate(struct discover_client *client,
 508                 char *password)
 509 {
 510         struct pb_protocol_message *message;
 511         struct auth_message auth_msg;
 512         int len;
 513
 514         auth_msg.op = AUTH_MSG_REQUEST;
 515         auth_msg.password = password;
 516
 517         len = pb_protocol_authenticate_len(&auth_msg);
 518
 519         message = pb_protocol_create_message(client,
 520                                 PB_PROTOCOL_ACTION_AUTHENTICATE, len);
 521         if (!message)
 522                 return -1;
 523
 524         pb_log("serialising auth message..\n");
 525         pb_protocol_serialise_authenticate(&auth_msg, message->payload, len);
 526
 527         pb_log("sending auth message..\n");
 528         return pb_protocol_write_message(client->fd, message);
 529 }
 530
 531 int discover_client_send_set_password(struct discover_client *client,
 532                 char *password, char *new_password)
 533 {
 534         struct pb_protocol_message *message;
 535         struct auth_message auth_msg;
 536         int len;
 537
 538         auth_msg.op = AUTH_MSG_SET;
 539         auth_msg.set_password.password = password;
 540         auth_msg.set_password.new_password = new_password;
 541
 542         len = pb_protocol_authenticate_len(&auth_msg);
 543
 544         message = pb_protocol_create_message(client,
 545                                 PB_PROTOCOL_ACTION_AUTHENTICATE, len);
 546         if (!message)
 547                 return -1;
 548
 549         pb_log("serialising auth message..\n");
 550         pb_protocol_serialise_authenticate(&auth_msg, message->payload, len);
 551
 552         pb_log("sending auth message..\n");
 553         return pb_protocol_write_message(client->fd, message);
 554 }