git.ozlabs.org Git - petitboot/blob - lib/pb-protocol/pb-protocol.c

   1
   2 #include <assert.h>
   3 #include <errno.h>
   4 #include <string.h>
   5 #include <stdbool.h>
   6 #include <stdint.h>
   7 #include <asm/byteorder.h>
   8
   9 #include <talloc/talloc.h>
  10 #include <list/list.h>
  11 #include <log/log.h>
  12
  13 #include "pb-protocol.h"
  14
  15
  16 /* Message format:
  17  *
  18  * 4-byte action, determines the remaining message content
  19  * 4-byte total payload len
  20  *   - not including action and payload len header
  21  *
  22  * action = 0x1: device add message
  23  *  payload:
  24  *   4-byte len, id
  25  *   1-byte type
  26  *   4-byte len, name
  27  *   4-byte len, description
  28  *   4-byte len, icon_file
  29  *
  30  *   4-byte option count
  31  *   for each option:
  32  *    4-byte len, id
  33  *    4-byte len, name
  34  *    4-byte len, description
  35  *    4-byte len, icon_file
  36  *    4-byte len, boot_image_file
  37  *    4-byte len, initrd_file
  38  *    4-byte len, dtb_file
  39  *    4-byte len, boot_args
  40  *
  41  * action = 0x2: device remove message
  42  *  payload:
  43  *   4-byte len, id
  44  *
  45  * action = 0x3: boot
  46  *  payload:
  47  *   4-byte len, boot option id
  48  *   4-byte len, boot_image_file
  49  *   4-byte len, initrd_file
  50  *   4-byte len, dtb_file
  51  *   4-byte len, boot_args
  52  *
  53  */
  54
  55 void pb_protocol_dump_device(const struct device *dev, const char *text,
  56         FILE *stream)
  57 {
  58         struct boot_option *opt;
  59
  60         fprintf(stream, "%snew dev:\n", text);
  61         fprintf(stream, "%s\tid:   %s\n", text, dev->id);
  62         fprintf(stream, "%s\tname: %s\n", text, dev->name);
  63         fprintf(stream, "%s\tdesc: %s\n", text, dev->description);
  64         fprintf(stream, "%s\ticon: %s\n", text, dev->icon_file);
  65         fprintf(stream, "%s\tboot options:\n", text);
  66         list_for_each_entry(&dev->boot_options, opt, list) {
  67                 fprintf(stream, "%s\t\tid:   %s\n", text, opt->id);
  68                 fprintf(stream, "%s\t\tname: %s\n", text, opt->name);
  69                 fprintf(stream, "%s\t\tdesc: %s\n", text, opt->description);
  70                 fprintf(stream, "%s\t\ticon: %s\n", text, opt->icon_file);
  71                 fprintf(stream, "%s\t\tboot: %s\n", text, opt->boot_image_file);
  72                 fprintf(stream, "%s\t\tinit: %s\n", text, opt->initrd_file);
  73                 fprintf(stream, "%s\t\tdtb:  %s\n", text, opt->dtb_file);
  74                 fprintf(stream, "%s\t\targs: %s\n", text, opt->boot_args);
  75         }
  76 }
  77
  78 int pb_protocol_device_cmp(const struct device *a, const struct device *b)
  79 {
  80         return !strcmp(a->id, b->id);
  81 }
  82
  83 int pb_protocol_boot_option_cmp(const struct boot_option *a,
  84         const struct boot_option *b)
  85 {
  86         return !strcmp(a->id, b->id);
  87 }
  88
  89 /* Write a string into the buffer, starting at pos.
  90  *
  91  * Returns the total length used for the write, including length header.
  92  */
  93 int pb_protocol_serialise_string(char *pos, const char *str)
  94 {
  95         int len = 0;
  96
  97         if (str)
  98                 len = strlen(str);
  99
 100         *(uint32_t *)pos = __cpu_to_be32(len);
 101         pos += sizeof(uint32_t);
 102
 103         memcpy(pos, str, len);
 104
 105         return len + sizeof(uint32_t);
 106 }
 107
 108 /* Read a string from a buffer, allocating the new string as necessary.
 109  *
 110  * @param[in] ctx       The talloc context to base the allocation on
 111  * @param[in,out] pos   Where to start reading
 112  * @param[in,out] len   The amount of data remaining in the buffer
 113  * @param[out] str      Pointer to resuling string
 114  * @return              zero on success, non-zero on failure
 115  */
 116 static int read_string(void *ctx, const char **pos, unsigned int *len,
 117         char **str)
 118 {
 119         uint32_t str_len, read_len;
 120
 121         if (*len < sizeof(uint32_t))
 122                 return -1;
 123
 124         str_len = __be32_to_cpu(*(uint32_t *)(*pos));
 125         read_len = sizeof(uint32_t);
 126
 127         if (read_len + str_len > *len)
 128                 return -1;
 129
 130         if (str_len == 0)
 131                 *str = NULL;
 132         else
 133                 *str = talloc_strndup(ctx, *pos + read_len, str_len);
 134
 135         read_len += str_len;
 136
 137         /* all ok, update the caller's pointers */
 138         *pos += read_len;
 139         *len -= read_len;
 140
 141         return 0;
 142 }
 143
 144 static int read_u32(const char **pos, unsigned int *len, unsigned int *p)
 145 {
 146         if (*len < sizeof(uint32_t))
 147                 return -1;
 148
 149         *p = (unsigned int)__be32_to_cpu(*(uint32_t *)(*pos));
 150         *pos += sizeof(uint32_t);
 151         *len -= sizeof(uint32_t);
 152
 153         return 0;
 154 }
 155
 156 char *pb_protocol_deserialise_string(void *ctx,
 157                 const struct pb_protocol_message *message)
 158 {
 159         const char *buf;
 160         char *str;
 161         unsigned int len;
 162
 163         len = message->payload_len;
 164         buf = message->payload;
 165
 166         if (read_string(ctx, &buf, &len, &str))
 167                 return NULL;
 168
 169         return str;
 170 }
 171
 172 static int optional_strlen(const char *str)
 173 {
 174         if (!str)
 175                 return 0;
 176         return strlen(str);
 177 }
 178
 179 int pb_protocol_device_len(const struct device *dev)
 180 {
 181         return  4 + optional_strlen(dev->id) +
 182                 sizeof(dev->type) +
 183                 4 + optional_strlen(dev->name) +
 184                 4 + optional_strlen(dev->description) +
 185                 4 + optional_strlen(dev->icon_file);
 186 }
 187
 188 int pb_protocol_boot_option_len(const struct boot_option *opt)
 189 {
 190
 191         return  4 + optional_strlen(opt->device_id) +
 192                 4 + optional_strlen(opt->id) +
 193                 4 + optional_strlen(opt->name) +
 194                 4 + optional_strlen(opt->description) +
 195                 4 + optional_strlen(opt->icon_file) +
 196                 4 + optional_strlen(opt->boot_image_file) +
 197                 4 + optional_strlen(opt->initrd_file) +
 198                 4 + optional_strlen(opt->dtb_file) +
 199                 4 + optional_strlen(opt->boot_args) +
 200                 sizeof(opt->is_default);
 201 }
 202
 203 int pb_protocol_boot_len(const struct boot_command *boot)
 204 {
 205         return  4 + optional_strlen(boot->option_id) +
 206                 4 + optional_strlen(boot->boot_image_file) +
 207                 4 + optional_strlen(boot->initrd_file) +
 208                 4 + optional_strlen(boot->dtb_file) +
 209                 4 + optional_strlen(boot->boot_args);
 210 }
 211
 212 int pb_protocol_boot_status_len(const struct boot_status *status)
 213 {
 214         return  4 +
 215                 4 + optional_strlen(status->message) +
 216                 4 + optional_strlen(status->detail) +
 217                 4;
 218 }
 219
 220 int pb_protocol_system_info_len(const struct system_info *sysinfo)
 221 {
 222         unsigned int len, i;
 223
 224         len =   4 + optional_strlen(sysinfo->type) +
 225                 4 + optional_strlen(sysinfo->identifier) +
 226                 4 + 4;
 227
 228         for (i = 0; i < sysinfo->n_interfaces; i++) {
 229                 struct interface_info *if_info = sysinfo->interfaces[i];
 230                 len +=  4 + if_info->hwaddr_size +
 231                         4 + optional_strlen(if_info->name) +
 232                         sizeof(if_info->link);
 233         }
 234
 235         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 236                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 237                 len +=  4 + optional_strlen(bd_info->name) +
 238                         4 + optional_strlen(bd_info->uuid) +
 239                         4 + optional_strlen(bd_info->mountpoint);
 240         }
 241
 242         return len;
 243 }
 244
 245 static int pb_protocol_interface_config_len(struct interface_config *conf)
 246 {
 247         unsigned int len;
 248
 249         len =   sizeof(conf->hwaddr) +
 250                 4 /* conf->ignore */;
 251
 252         if (conf->ignore)
 253                 return len;
 254
 255         len += 4 /* conf->method */;
 256
 257         if (conf->method == CONFIG_METHOD_STATIC) {
 258                 len += 4 + optional_strlen(conf->static_config.address);
 259                 len += 4 + optional_strlen(conf->static_config.gateway);
 260         }
 261
 262         return len;
 263 }
 264
 265 int pb_protocol_config_len(const struct config *config)
 266 {
 267         unsigned int i, len;
 268
 269         len =   4 /* config->autoboot_enabled */ +
 270                 4 /* config->autoboot_timeout_sec */;
 271
 272         len += 4;
 273         for (i = 0; i < config->network.n_interfaces; i++)
 274                 len += pb_protocol_interface_config_len(
 275                                 config->network.interfaces[i]);
 276
 277         len += 4;
 278         for (i = 0; i < config->network.n_dns_servers; i++)
 279                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 280
 281         len += 4;
 282         len += config->n_boot_priorities * 8;
 283
 284         len += 4 + optional_strlen(config->boot_device);
 285
 286         return len;
 287 }
 288
 289 int pb_protocol_serialise_device(const struct device *dev,
 290                 char *buf, int buf_len)
 291 {
 292         char *pos = buf;
 293
 294         pos += pb_protocol_serialise_string(pos, dev->id);
 295         *(enum device_type *)pos = dev->type;
 296         pos += sizeof(enum device_type);
 297         pos += pb_protocol_serialise_string(pos, dev->name);
 298         pos += pb_protocol_serialise_string(pos, dev->description);
 299         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 300
 301         assert(pos <= buf + buf_len);
 302         (void)buf_len;
 303
 304         return 0;
 305 }
 306
 307 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 308                 char *buf, int buf_len)
 309 {
 310         char *pos = buf;
 311
 312         pos += pb_protocol_serialise_string(pos, opt->device_id);
 313         pos += pb_protocol_serialise_string(pos, opt->id);
 314         pos += pb_protocol_serialise_string(pos, opt->name);
 315         pos += pb_protocol_serialise_string(pos, opt->description);
 316         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 317         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 318         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 319         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 320         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 321
 322         *(bool *)pos = opt->is_default;
 323         pos += sizeof(bool);
 324
 325         assert(pos <= buf + buf_len);
 326         (void)buf_len;
 327
 328         return 0;
 329 }
 330
 331 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 332                 char *buf, int buf_len)
 333 {
 334         char *pos = buf;
 335
 336         pos += pb_protocol_serialise_string(pos, boot->option_id);
 337         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 338         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 339         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 340         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 341
 342         assert(pos <= buf + buf_len);
 343         (void)buf_len;
 344
 345         return 0;
 346 }
 347
 348 int pb_protocol_serialise_boot_status(const struct boot_status *status,
 349                 char *buf, int buf_len)
 350 {
 351         char *pos = buf;
 352
 353         *(uint32_t *)pos = __cpu_to_be32(status->type);
 354         pos += sizeof(uint32_t);
 355
 356         pos += pb_protocol_serialise_string(pos, status->message);
 357         pos += pb_protocol_serialise_string(pos, status->detail);
 358
 359         *(uint32_t *)pos = __cpu_to_be32(status->type);
 360         pos += sizeof(uint32_t);
 361
 362         assert(pos <= buf + buf_len);
 363         (void)buf_len;
 364
 365         return 0;
 366 }
 367
 368 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 369                 char *buf, int buf_len)
 370 {
 371         char *pos = buf;
 372         unsigned int i;
 373
 374         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 375         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 376
 377         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 378         pos += sizeof(uint32_t);
 379
 380         for (i = 0; i < sysinfo->n_interfaces; i++) {
 381                 struct interface_info *if_info = sysinfo->interfaces[i];
 382
 383                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 384                 pos += sizeof(uint32_t);
 385
 386                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 387                 pos += if_info->hwaddr_size;
 388
 389                 pos += pb_protocol_serialise_string(pos, if_info->name);
 390
 391                 *(bool *)pos = if_info->link;
 392                 pos += sizeof(bool);
 393         }
 394
 395         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 396         pos += sizeof(uint32_t);
 397
 398         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 399                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 400
 401                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 402                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 403                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 404         }
 405
 406         assert(pos <= buf + buf_len);
 407         (void)buf_len;
 408
 409         return 0;
 410 }
 411
 412 static int pb_protocol_serialise_config_interface(char *buf,
 413                 struct interface_config *conf)
 414 {
 415         char *pos = buf;
 416
 417         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 418         pos += sizeof(conf->hwaddr);
 419
 420         *(uint32_t *)pos = conf->ignore;
 421         pos += 4;
 422
 423         if (conf->ignore)
 424                 return pos - buf;
 425
 426         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 427         pos += 4;
 428
 429         if (conf->method == CONFIG_METHOD_STATIC) {
 430                 pos += pb_protocol_serialise_string(pos,
 431                                 conf->static_config.address);
 432                 pos += pb_protocol_serialise_string(pos,
 433                                 conf->static_config.gateway);
 434         }
 435
 436         return pos - buf;
 437 }
 438
 439 int pb_protocol_serialise_config(const struct config *config,
 440                 char *buf, int buf_len)
 441 {
 442         char *pos = buf;
 443         unsigned int i;
 444
 445         *(uint32_t *)pos = config->autoboot_enabled;
 446         pos += 4;
 447
 448         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 449         pos += 4;
 450
 451         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 452         pos += 4;
 453         for (i = 0; i < config->network.n_interfaces; i++) {
 454                 struct interface_config *iface =
 455                         config->network.interfaces[i];
 456                 pos += pb_protocol_serialise_config_interface(pos, iface);
 457         }
 458
 459         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 460         pos += 4;
 461         for (i = 0; i < config->network.n_dns_servers; i++) {
 462                 pos += pb_protocol_serialise_string(pos,
 463                                 config->network.dns_servers[i]);
 464         }
 465
 466         *(uint32_t *)pos = __cpu_to_be32(config->n_boot_priorities);
 467         pos += 4;
 468         for (i = 0; i < config->n_boot_priorities; i++) {
 469                 *(uint32_t *)pos =
 470                         __cpu_to_be32(config->boot_priorities[i].type);
 471                 pos += 4;
 472                 *(uint32_t *)pos =
 473                         __cpu_to_be32(config->boot_priorities[i].priority);
 474                 pos += 4;
 475         }
 476
 477         pos += pb_protocol_serialise_string(pos, config->boot_device);
 478
 479         assert(pos <= buf + buf_len);
 480         (void)buf_len;
 481
 482         return 0;
 483 }
 484
 485 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 486 {
 487         int total_len, rc;
 488         char *pos;
 489
 490         total_len = sizeof(*message) + message->payload_len;
 491
 492         message->payload_len = __cpu_to_be32(message->payload_len);
 493         message->action = __cpu_to_be32(message->action);
 494
 495         for (pos = (void *)message; total_len;) {
 496                 rc = write(fd, pos, total_len);
 497
 498                 if (rc <= 0)
 499                         break;
 500
 501                 total_len -= rc;
 502                 pos += rc;
 503         }
 504
 505         talloc_free(message);
 506
 507         if (!total_len)
 508                 return 0;
 509
 510         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 511         return -1;
 512 }
 513
 514 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 515                 enum pb_protocol_action action, int payload_len)
 516 {
 517         struct pb_protocol_message *message;
 518
 519         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 520                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 521                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 522                 return NULL;
 523         }
 524
 525         message = talloc_size(ctx, sizeof(*message) + payload_len);
 526
 527         /* we convert these to big-endian in write_message() */
 528         message->action = action;
 529         message->payload_len = payload_len;
 530
 531         return message;
 532
 533 }
 534
 535 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 536 {
 537         struct pb_protocol_message *message, m;
 538         int rc;
 539         unsigned int len;
 540
 541         /* use the stack for the initial 8-byte read */
 542
 543         rc = read(fd, &m, sizeof(m));
 544         if (rc != sizeof(m))
 545                 return NULL;
 546
 547         m.payload_len = __be32_to_cpu(m.payload_len);
 548         m.action = __be32_to_cpu(m.action);
 549
 550         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 551                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 552                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 553                 return NULL;
 554         }
 555
 556         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 557         memcpy(message, &m, sizeof(m));
 558
 559         for (len = 0; len < m.payload_len;) {
 560                 rc = read(fd, message->payload + len, m.payload_len - len);
 561
 562                 if (rc <= 0) {
 563                         talloc_free(message);
 564                         pb_log("%s: failed (%u): %s\n", __func__, len,
 565                                 strerror(errno));
 566                         return NULL;
 567                 }
 568
 569                 len += rc;
 570         }
 571
 572         return message;
 573 }
 574
 575
 576 int pb_protocol_deserialise_device(struct device *dev,
 577                 const struct pb_protocol_message *message)
 578 {
 579         unsigned int len;
 580         const char *pos;
 581         int rc = -1;
 582
 583         len = message->payload_len;
 584         pos = message->payload;
 585
 586         if (read_string(dev, &pos, &len, &dev->id))
 587                 goto out;
 588
 589         if (len < sizeof(enum device_type))
 590                 goto out;
 591         dev->type = *(enum device_type *)(pos);
 592         pos += sizeof(enum device_type);
 593         len -= sizeof(enum device_type);
 594
 595         if (read_string(dev, &pos, &len, &dev->name))
 596                 goto out;
 597
 598         if (read_string(dev, &pos, &len, &dev->description))
 599                 goto out;
 600
 601         if (read_string(dev, &pos, &len, &dev->icon_file))
 602                 goto out;
 603
 604         rc = 0;
 605
 606 out:
 607         return rc;
 608 }
 609
 610 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 611                 const struct pb_protocol_message *message)
 612 {
 613         unsigned int len;
 614         const char *pos;
 615         int rc = -1;
 616
 617         len = message->payload_len;
 618         pos = message->payload;
 619
 620         if (read_string(opt, &pos, &len, &opt->device_id))
 621                 goto out;
 622
 623         if (read_string(opt, &pos, &len, &opt->id))
 624                 goto out;
 625
 626         if (read_string(opt, &pos, &len, &opt->name))
 627                 goto out;
 628
 629         if (read_string(opt, &pos, &len, &opt->description))
 630                 goto out;
 631
 632         if (read_string(opt, &pos, &len, &opt->icon_file))
 633                 goto out;
 634
 635         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 636                 goto out;
 637
 638         if (read_string(opt, &pos, &len, &opt->initrd_file))
 639                 goto out;
 640
 641         if (read_string(opt, &pos, &len, &opt->dtb_file))
 642                 goto out;
 643
 644         if (read_string(opt, &pos, &len, &opt->boot_args))
 645                 goto out;
 646
 647         if (len < sizeof(bool))
 648                 goto out;
 649         opt->is_default = *(bool *)(pos);
 650
 651         rc = 0;
 652
 653 out:
 654         return rc;
 655 }
 656
 657 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 658                 const struct pb_protocol_message *message)
 659 {
 660         unsigned int len;
 661         const char *pos;
 662         int rc = -1;
 663
 664         len = message->payload_len;
 665         pos = message->payload;
 666
 667         if (read_string(cmd, &pos, &len, &cmd->option_id))
 668                 goto out;
 669
 670         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 671                 goto out;
 672
 673         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 674                 goto out;
 675
 676         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 677                 goto out;
 678
 679         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 680                 goto out;
 681
 682         rc = 0;
 683
 684 out:
 685         return rc;
 686 }
 687
 688 int pb_protocol_deserialise_boot_status(struct boot_status *status,
 689                 const struct pb_protocol_message *message)
 690 {
 691         unsigned int len;
 692         const char *pos;
 693         int rc = -1;
 694
 695         len = message->payload_len;
 696         pos = message->payload;
 697
 698         /* first up, the type enum... */
 699         if (len < sizeof(uint32_t))
 700                 goto out;
 701
 702         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 703
 704         switch (status->type) {
 705         case BOOT_STATUS_ERROR:
 706         case BOOT_STATUS_INFO:
 707                 break;
 708         default:
 709                 goto out;
 710         }
 711
 712         pos += sizeof(uint32_t);
 713         len -= sizeof(uint32_t);
 714
 715         /* message and detail strings */
 716         if (read_string(status, &pos, &len, &status->message))
 717                 goto out;
 718
 719         if (read_string(status, &pos, &len, &status->detail))
 720                 goto out;
 721
 722         /* and finally, progress */
 723         if (len < sizeof(uint32_t))
 724                 goto out;
 725
 726         status->progress = __be32_to_cpu(*(uint32_t *)(pos));
 727
 728         /* clamp to 100% */
 729         if (status->progress > 100)
 730                 status->progress = 100;
 731
 732         rc = 0;
 733
 734 out:
 735         return rc;
 736 }
 737
 738 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 739                 const struct pb_protocol_message *message)
 740 {
 741         unsigned int len, i;
 742         const char *pos;
 743         int rc = -1;
 744
 745         len = message->payload_len;
 746         pos = message->payload;
 747
 748         /* type and identifier strings */
 749         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 750                 goto out;
 751
 752         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 753                 goto out;
 754
 755         /* number of interfaces */
 756         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 757                 goto out;
 758
 759         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 760                         sysinfo->n_interfaces);
 761
 762         for (i = 0; i < sysinfo->n_interfaces; i++) {
 763                 struct interface_info *if_info = talloc(sysinfo,
 764                                                         struct interface_info);
 765
 766                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 767                         goto out;
 768
 769                 if (len < if_info->hwaddr_size)
 770                         goto out;
 771
 772                 if_info->hwaddr = talloc_memdup(if_info, pos,
 773                                                 if_info->hwaddr_size);
 774                 pos += if_info->hwaddr_size;
 775                 len -= if_info->hwaddr_size;
 776
 777                 if (read_string(if_info, &pos, &len, &if_info->name))
 778                         goto out;
 779
 780                 if_info->link = *(bool *)pos;
 781                 pos += sizeof(if_info->link);
 782
 783                 sysinfo->interfaces[i] = if_info;
 784         }
 785
 786         /* number of interfaces */
 787         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 788                 goto out;
 789
 790         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 791                         sysinfo->n_blockdevs);
 792
 793         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 794                 struct blockdev_info *bd_info = talloc(sysinfo,
 795                                                         struct blockdev_info);
 796
 797                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 798                         goto out;
 799
 800                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 801                         goto out;
 802
 803                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 804                         goto out;
 805
 806                 sysinfo->blockdevs[i] = bd_info;
 807         }
 808         rc = 0;
 809
 810 out:
 811         return rc;
 812 }
 813
 814 static int pb_protocol_deserialise_config_interface(const char **buf,
 815                 unsigned int *len, struct interface_config *iface)
 816 {
 817         unsigned int tmp;
 818
 819         if (*len < sizeof(iface->hwaddr))
 820                 return -1;
 821
 822         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 823         *buf += sizeof(iface->hwaddr);
 824         *len -= sizeof(iface->hwaddr);
 825
 826         if (read_u32(buf, len, &tmp))
 827                 return -1;
 828         iface->ignore = !!tmp;
 829
 830         if (iface->ignore)
 831                 return 0;
 832
 833         if (read_u32(buf, len, &iface->method))
 834                 return -1;
 835
 836         if (iface->method == CONFIG_METHOD_STATIC) {
 837                 if (read_string(iface, buf, len, &iface->static_config.address))
 838                         return -1;
 839
 840                 if (read_string(iface, buf, len, &iface->static_config.gateway))
 841                         return -1;
 842         }
 843
 844         return 0;
 845 }
 846
 847 int pb_protocol_deserialise_config(struct config *config,
 848                 const struct pb_protocol_message *message)
 849 {
 850         unsigned int len, i, tmp;
 851         const char *pos;
 852         int rc = -1;
 853         char *str;
 854
 855         len = message->payload_len;
 856         pos = message->payload;
 857
 858         if (read_u32(&pos, &len, &tmp))
 859                 goto out;
 860         config->autoboot_enabled = !!tmp;
 861
 862         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
 863                 goto out;
 864
 865         if (read_u32(&pos, &len, &config->network.n_interfaces))
 866                 goto out;
 867
 868         config->network.interfaces = talloc_array(config,
 869                         struct interface_config *, config->network.n_interfaces);
 870
 871         for (i = 0; i < config->network.n_interfaces; i++) {
 872                 struct interface_config *iface = talloc_zero(
 873                                 config->network.interfaces,
 874                                 struct interface_config);
 875                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
 876                         goto out;
 877                 config->network.interfaces[i] = iface;
 878         }
 879
 880         if (read_u32(&pos, &len, &config->network.n_dns_servers))
 881                 goto out;
 882         config->network.dns_servers = talloc_array(config, const char *,
 883                         config->network.n_dns_servers);
 884
 885         for (i = 0; i < config->network.n_dns_servers; i++) {
 886                 if (read_string(config->network.dns_servers, &pos, &len, &str))
 887                         goto out;
 888                 config->network.dns_servers[i] = str;
 889         }
 890
 891         if (read_u32(&pos, &len, &config->n_boot_priorities))
 892                 goto out;
 893         config->boot_priorities = talloc_array(config, struct boot_priority,
 894                         config->n_boot_priorities);
 895
 896         for (i = 0; i < config->n_boot_priorities; i++) {
 897                 if (read_u32(&pos, &len, &tmp))
 898                         goto out;
 899                 config->boot_priorities[i].priority = (int)tmp;
 900                 if (read_u32(&pos, &len, &tmp))
 901                         goto out;
 902                 config->boot_priorities[i].type = tmp;
 903         }
 904
 905         if (read_string(config, &pos, &len, &str))
 906                 goto out;
 907
 908         config->boot_device = str;
 909
 910         rc = 0;
 911
 912 out:
 913         return rc;
 914 }