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                 4 /* config->safe_mode */;
 272
 273         len += 4;
 274         for (i = 0; i < config->network.n_interfaces; i++)
 275                 len += pb_protocol_interface_config_len(
 276                                 config->network.interfaces[i]);
 277
 278         len += 4;
 279         for (i = 0; i < config->network.n_dns_servers; i++)
 280                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 281
 282         len += 4;
 283         for (i = 0; i < config->n_autoboot_opts; i++) {
 284                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
 285                         len += 4 + 4;
 286                 else
 287                         len += 4 + 4 +
 288                                 optional_strlen(config->autoboot_opts[i].uuid);
 289         }
 290
 291         len += 4 + 4; /* ipmi_bootdev, ipmi_bootdev_persistent */
 292
 293         len += 4; /* allow_writes */
 294
 295         len += 4 + optional_strlen(config->lang);
 296
 297         return len;
 298 }
 299
 300 int pb_protocol_url_len(const char *url)
 301 {
 302         /* url + length field */
 303         return 4 + optional_strlen(url);
 304 }
 305
 306 int pb_protocol_serialise_device(const struct device *dev,
 307                 char *buf, int buf_len)
 308 {
 309         char *pos = buf;
 310
 311         pos += pb_protocol_serialise_string(pos, dev->id);
 312         *(enum device_type *)pos = dev->type;
 313         pos += sizeof(enum device_type);
 314         pos += pb_protocol_serialise_string(pos, dev->name);
 315         pos += pb_protocol_serialise_string(pos, dev->description);
 316         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 317
 318         assert(pos <= buf + buf_len);
 319         (void)buf_len;
 320
 321         return 0;
 322 }
 323
 324 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 325                 char *buf, int buf_len)
 326 {
 327         char *pos = buf;
 328
 329         pos += pb_protocol_serialise_string(pos, opt->device_id);
 330         pos += pb_protocol_serialise_string(pos, opt->id);
 331         pos += pb_protocol_serialise_string(pos, opt->name);
 332         pos += pb_protocol_serialise_string(pos, opt->description);
 333         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 334         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 335         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 336         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 337         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 338
 339         *(bool *)pos = opt->is_default;
 340         pos += sizeof(bool);
 341
 342         assert(pos <= buf + buf_len);
 343         (void)buf_len;
 344
 345         return 0;
 346 }
 347
 348 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 349                 char *buf, int buf_len)
 350 {
 351         char *pos = buf;
 352
 353         pos += pb_protocol_serialise_string(pos, boot->option_id);
 354         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 355         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 356         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 357         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 358
 359         assert(pos <= buf + buf_len);
 360         (void)buf_len;
 361
 362         return 0;
 363 }
 364
 365 int pb_protocol_serialise_boot_status(const struct boot_status *status,
 366                 char *buf, int buf_len)
 367 {
 368         char *pos = buf;
 369
 370         *(uint32_t *)pos = __cpu_to_be32(status->type);
 371         pos += sizeof(uint32_t);
 372
 373         pos += pb_protocol_serialise_string(pos, status->message);
 374         pos += pb_protocol_serialise_string(pos, status->detail);
 375
 376         *(uint32_t *)pos = __cpu_to_be32(status->type);
 377         pos += sizeof(uint32_t);
 378
 379         assert(pos <= buf + buf_len);
 380         (void)buf_len;
 381
 382         return 0;
 383 }
 384
 385 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 386                 char *buf, int buf_len)
 387 {
 388         char *pos = buf;
 389         unsigned int i;
 390
 391         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 392         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 393
 394         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 395         pos += sizeof(uint32_t);
 396
 397         for (i = 0; i < sysinfo->n_interfaces; i++) {
 398                 struct interface_info *if_info = sysinfo->interfaces[i];
 399
 400                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 401                 pos += sizeof(uint32_t);
 402
 403                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 404                 pos += if_info->hwaddr_size;
 405
 406                 pos += pb_protocol_serialise_string(pos, if_info->name);
 407
 408                 *(bool *)pos = if_info->link;
 409                 pos += sizeof(bool);
 410         }
 411
 412         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 413         pos += sizeof(uint32_t);
 414
 415         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 416                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 417
 418                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 419                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 420                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 421         }
 422
 423         assert(pos <= buf + buf_len);
 424         (void)buf_len;
 425
 426         return 0;
 427 }
 428
 429 static int pb_protocol_serialise_config_interface(char *buf,
 430                 struct interface_config *conf)
 431 {
 432         char *pos = buf;
 433
 434         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 435         pos += sizeof(conf->hwaddr);
 436
 437         *(uint32_t *)pos = conf->ignore;
 438         pos += 4;
 439
 440         if (conf->ignore)
 441                 return pos - buf;
 442
 443         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 444         pos += 4;
 445
 446         if (conf->method == CONFIG_METHOD_STATIC) {
 447                 pos += pb_protocol_serialise_string(pos,
 448                                 conf->static_config.address);
 449                 pos += pb_protocol_serialise_string(pos,
 450                                 conf->static_config.gateway);
 451         }
 452
 453         return pos - buf;
 454 }
 455
 456 int pb_protocol_serialise_config(const struct config *config,
 457                 char *buf, int buf_len)
 458 {
 459         char *pos = buf;
 460         unsigned int i;
 461
 462         *(uint32_t *)pos = config->autoboot_enabled;
 463         pos += 4;
 464
 465         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 466         pos += 4;
 467
 468         *(uint32_t *)pos = config->safe_mode;
 469         pos += 4;
 470
 471         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 472         pos += 4;
 473         for (i = 0; i < config->network.n_interfaces; i++) {
 474                 struct interface_config *iface =
 475                         config->network.interfaces[i];
 476                 pos += pb_protocol_serialise_config_interface(pos, iface);
 477         }
 478
 479         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 480         pos += 4;
 481         for (i = 0; i < config->network.n_dns_servers; i++) {
 482                 pos += pb_protocol_serialise_string(pos,
 483                                 config->network.dns_servers[i]);
 484         }
 485
 486         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 487         pos += 4;
 488         for (i = 0; i < config->n_autoboot_opts; i++) {
 489                 *(uint32_t *)pos =
 490                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 491                 pos += 4;
 492                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 493                         *(uint32_t *)pos =
 494                                 __cpu_to_be32(config->autoboot_opts[i].type);
 495                         pos += 4;
 496                 } else {
 497                         pos += pb_protocol_serialise_string(pos,
 498                                                 config->autoboot_opts[i].uuid);
 499                 }
 500         }
 501
 502         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 503         pos += 4;
 504         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 505         pos += 4;
 506
 507         *(uint32_t *)pos = config->allow_writes;
 508         pos += 4;
 509
 510         pos += pb_protocol_serialise_string(pos, config->lang);
 511
 512         assert(pos <= buf + buf_len);
 513         (void)buf_len;
 514
 515         return 0;
 516 }
 517
 518 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 519 {
 520         char *pos = buf;
 521
 522         pos += pb_protocol_serialise_string(pos, url);
 523
 524         assert(pos <=buf+buf_len);
 525         (void)buf_len;
 526
 527         return 0;
 528 }
 529
 530 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 531 {
 532         int total_len, rc;
 533         char *pos;
 534
 535         total_len = sizeof(*message) + message->payload_len;
 536
 537         message->payload_len = __cpu_to_be32(message->payload_len);
 538         message->action = __cpu_to_be32(message->action);
 539
 540         for (pos = (void *)message; total_len;) {
 541                 rc = write(fd, pos, total_len);
 542
 543                 if (rc <= 0)
 544                         break;
 545
 546                 total_len -= rc;
 547                 pos += rc;
 548         }
 549
 550         talloc_free(message);
 551
 552         if (!total_len)
 553                 return 0;
 554
 555         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 556         return -1;
 557 }
 558
 559 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 560                 enum pb_protocol_action action, int payload_len)
 561 {
 562         struct pb_protocol_message *message;
 563
 564         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 565                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 566                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 567                 return NULL;
 568         }
 569
 570         message = talloc_size(ctx, sizeof(*message) + payload_len);
 571
 572         /* we convert these to big-endian in write_message() */
 573         message->action = action;
 574         message->payload_len = payload_len;
 575
 576         return message;
 577
 578 }
 579
 580 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 581 {
 582         struct pb_protocol_message *message, m;
 583         int rc;
 584         unsigned int len;
 585
 586         /* use the stack for the initial 8-byte read */
 587
 588         rc = read(fd, &m, sizeof(m));
 589         if (rc != sizeof(m))
 590                 return NULL;
 591
 592         m.payload_len = __be32_to_cpu(m.payload_len);
 593         m.action = __be32_to_cpu(m.action);
 594
 595         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 596                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 597                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 598                 return NULL;
 599         }
 600
 601         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 602         memcpy(message, &m, sizeof(m));
 603
 604         for (len = 0; len < m.payload_len;) {
 605                 rc = read(fd, message->payload + len, m.payload_len - len);
 606
 607                 if (rc <= 0) {
 608                         talloc_free(message);
 609                         pb_log("%s: failed (%u): %s\n", __func__, len,
 610                                 strerror(errno));
 611                         return NULL;
 612                 }
 613
 614                 len += rc;
 615         }
 616
 617         return message;
 618 }
 619
 620
 621 int pb_protocol_deserialise_device(struct device *dev,
 622                 const struct pb_protocol_message *message)
 623 {
 624         unsigned int len;
 625         const char *pos;
 626         int rc = -1;
 627
 628         len = message->payload_len;
 629         pos = message->payload;
 630
 631         if (read_string(dev, &pos, &len, &dev->id))
 632                 goto out;
 633
 634         if (len < sizeof(enum device_type))
 635                 goto out;
 636         dev->type = *(enum device_type *)(pos);
 637         pos += sizeof(enum device_type);
 638         len -= sizeof(enum device_type);
 639
 640         if (read_string(dev, &pos, &len, &dev->name))
 641                 goto out;
 642
 643         if (read_string(dev, &pos, &len, &dev->description))
 644                 goto out;
 645
 646         if (read_string(dev, &pos, &len, &dev->icon_file))
 647                 goto out;
 648
 649         rc = 0;
 650
 651 out:
 652         return rc;
 653 }
 654
 655 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 656                 const struct pb_protocol_message *message)
 657 {
 658         unsigned int len;
 659         const char *pos;
 660         int rc = -1;
 661
 662         len = message->payload_len;
 663         pos = message->payload;
 664
 665         if (read_string(opt, &pos, &len, &opt->device_id))
 666                 goto out;
 667
 668         if (read_string(opt, &pos, &len, &opt->id))
 669                 goto out;
 670
 671         if (read_string(opt, &pos, &len, &opt->name))
 672                 goto out;
 673
 674         if (read_string(opt, &pos, &len, &opt->description))
 675                 goto out;
 676
 677         if (read_string(opt, &pos, &len, &opt->icon_file))
 678                 goto out;
 679
 680         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 681                 goto out;
 682
 683         if (read_string(opt, &pos, &len, &opt->initrd_file))
 684                 goto out;
 685
 686         if (read_string(opt, &pos, &len, &opt->dtb_file))
 687                 goto out;
 688
 689         if (read_string(opt, &pos, &len, &opt->boot_args))
 690                 goto out;
 691
 692         if (len < sizeof(bool))
 693                 goto out;
 694         opt->is_default = *(bool *)(pos);
 695
 696         rc = 0;
 697
 698 out:
 699         return rc;
 700 }
 701
 702 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 703                 const struct pb_protocol_message *message)
 704 {
 705         unsigned int len;
 706         const char *pos;
 707         int rc = -1;
 708
 709         len = message->payload_len;
 710         pos = message->payload;
 711
 712         if (read_string(cmd, &pos, &len, &cmd->option_id))
 713                 goto out;
 714
 715         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 716                 goto out;
 717
 718         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 719                 goto out;
 720
 721         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 722                 goto out;
 723
 724         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 725                 goto out;
 726
 727         rc = 0;
 728
 729 out:
 730         return rc;
 731 }
 732
 733 int pb_protocol_deserialise_boot_status(struct boot_status *status,
 734                 const struct pb_protocol_message *message)
 735 {
 736         unsigned int len;
 737         const char *pos;
 738         int rc = -1;
 739
 740         len = message->payload_len;
 741         pos = message->payload;
 742
 743         /* first up, the type enum... */
 744         if (len < sizeof(uint32_t))
 745                 goto out;
 746
 747         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 748
 749         switch (status->type) {
 750         case BOOT_STATUS_ERROR:
 751         case BOOT_STATUS_INFO:
 752                 break;
 753         default:
 754                 goto out;
 755         }
 756
 757         pos += sizeof(uint32_t);
 758         len -= sizeof(uint32_t);
 759
 760         /* message and detail strings */
 761         if (read_string(status, &pos, &len, &status->message))
 762                 goto out;
 763
 764         if (read_string(status, &pos, &len, &status->detail))
 765                 goto out;
 766
 767         /* and finally, progress */
 768         if (len < sizeof(uint32_t))
 769                 goto out;
 770
 771         status->progress = __be32_to_cpu(*(uint32_t *)(pos));
 772
 773         /* clamp to 100% */
 774         if (status->progress > 100)
 775                 status->progress = 100;
 776
 777         rc = 0;
 778
 779 out:
 780         return rc;
 781 }
 782
 783 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 784                 const struct pb_protocol_message *message)
 785 {
 786         unsigned int len, i;
 787         const char *pos;
 788         int rc = -1;
 789
 790         len = message->payload_len;
 791         pos = message->payload;
 792
 793         /* type and identifier strings */
 794         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 795                 goto out;
 796
 797         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 798                 goto out;
 799
 800         /* number of interfaces */
 801         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 802                 goto out;
 803
 804         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 805                         sysinfo->n_interfaces);
 806
 807         for (i = 0; i < sysinfo->n_interfaces; i++) {
 808                 struct interface_info *if_info = talloc(sysinfo,
 809                                                         struct interface_info);
 810
 811                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 812                         goto out;
 813
 814                 if (len < if_info->hwaddr_size)
 815                         goto out;
 816
 817                 if_info->hwaddr = talloc_memdup(if_info, pos,
 818                                                 if_info->hwaddr_size);
 819                 pos += if_info->hwaddr_size;
 820                 len -= if_info->hwaddr_size;
 821
 822                 if (read_string(if_info, &pos, &len, &if_info->name))
 823                         goto out;
 824
 825                 if_info->link = *(bool *)pos;
 826                 pos += sizeof(if_info->link);
 827
 828                 sysinfo->interfaces[i] = if_info;
 829         }
 830
 831         /* number of interfaces */
 832         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 833                 goto out;
 834
 835         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 836                         sysinfo->n_blockdevs);
 837
 838         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 839                 struct blockdev_info *bd_info = talloc(sysinfo,
 840                                                         struct blockdev_info);
 841
 842                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 843                         goto out;
 844
 845                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 846                         goto out;
 847
 848                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 849                         goto out;
 850
 851                 sysinfo->blockdevs[i] = bd_info;
 852         }
 853         rc = 0;
 854
 855 out:
 856         return rc;
 857 }
 858
 859 static int pb_protocol_deserialise_config_interface(const char **buf,
 860                 unsigned int *len, struct interface_config *iface)
 861 {
 862         unsigned int tmp;
 863
 864         if (*len < sizeof(iface->hwaddr))
 865                 return -1;
 866
 867         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 868         *buf += sizeof(iface->hwaddr);
 869         *len -= sizeof(iface->hwaddr);
 870
 871         if (read_u32(buf, len, &tmp))
 872                 return -1;
 873         iface->ignore = !!tmp;
 874
 875         if (iface->ignore)
 876                 return 0;
 877
 878         if (read_u32(buf, len, &iface->method))
 879                 return -1;
 880
 881         if (iface->method == CONFIG_METHOD_STATIC) {
 882                 if (read_string(iface, buf, len, &iface->static_config.address))
 883                         return -1;
 884
 885                 if (read_string(iface, buf, len, &iface->static_config.gateway))
 886                         return -1;
 887         }
 888
 889         return 0;
 890 }
 891
 892 int pb_protocol_deserialise_config(struct config *config,
 893                 const struct pb_protocol_message *message)
 894 {
 895         unsigned int len, i, tmp;
 896         const char *pos;
 897         int rc = -1;
 898         char *str;
 899
 900         len = message->payload_len;
 901         pos = message->payload;
 902
 903         if (read_u32(&pos, &len, &tmp))
 904                 goto out;
 905         config->autoboot_enabled = !!tmp;
 906
 907         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
 908                 goto out;
 909
 910         if (read_u32(&pos, &len, &tmp))
 911                 goto out;
 912         config->safe_mode = !!tmp;
 913
 914         if (read_u32(&pos, &len, &config->network.n_interfaces))
 915                 goto out;
 916
 917         config->network.interfaces = talloc_array(config,
 918                         struct interface_config *, config->network.n_interfaces);
 919
 920         for (i = 0; i < config->network.n_interfaces; i++) {
 921                 struct interface_config *iface = talloc_zero(
 922                                 config->network.interfaces,
 923                                 struct interface_config);
 924                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
 925                         goto out;
 926                 config->network.interfaces[i] = iface;
 927         }
 928
 929         if (read_u32(&pos, &len, &config->network.n_dns_servers))
 930                 goto out;
 931         config->network.dns_servers = talloc_array(config, const char *,
 932                         config->network.n_dns_servers);
 933
 934         for (i = 0; i < config->network.n_dns_servers; i++) {
 935                 if (read_string(config->network.dns_servers, &pos, &len, &str))
 936                         goto out;
 937                 config->network.dns_servers[i] = str;
 938         }
 939
 940         if (read_u32(&pos, &len, &config->n_autoboot_opts))
 941                 goto out;
 942         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 943                         config->n_autoboot_opts);
 944
 945         for (i = 0; i < config->n_autoboot_opts; i++) {
 946                 if (read_u32(&pos, &len, &tmp))
 947                         goto out;
 948                 config->autoboot_opts[i].boot_type = (int)tmp;
 949                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 950                         if (read_u32(&pos, &len, &tmp))
 951                                 goto out;
 952                         config->autoboot_opts[i].type = tmp;
 953                 } else {
 954                         if (read_string(config, &pos, &len, &str))
 955                                 goto out;
 956                         config->autoboot_opts[i].uuid = str;
 957                 }
 958         }
 959
 960         if (read_u32(&pos, &len, &config->ipmi_bootdev))
 961                 goto out;
 962         if (read_u32(&pos, &len, &tmp))
 963                 goto out;
 964         config->ipmi_bootdev_persistent = !!tmp;
 965
 966         if (read_u32(&pos, &len, &tmp))
 967                 goto out;
 968         config->allow_writes = !!tmp;
 969
 970         if (read_string(config, &pos, &len, &str))
 971                 goto out;
 972
 973         config->lang = str;
 974
 975         rc = 0;
 976
 977 out:
 978         return rc;
 979 }