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         /* BMC MAC */
 243         len += HWADDR_SIZE;
 244
 245         return len;
 246 }
 247
 248 static int pb_protocol_interface_config_len(struct interface_config *conf)
 249 {
 250         unsigned int len;
 251
 252         len =   sizeof(conf->hwaddr) +
 253                 4 /* conf->ignore */;
 254
 255         if (conf->ignore)
 256                 return len;
 257
 258         len += 4 /* conf->method */;
 259
 260         if (conf->method == CONFIG_METHOD_STATIC) {
 261                 len += 4 + optional_strlen(conf->static_config.address);
 262                 len += 4 + optional_strlen(conf->static_config.gateway);
 263         }
 264
 265         return len;
 266 }
 267
 268 int pb_protocol_config_len(const struct config *config)
 269 {
 270         unsigned int i, len;
 271
 272         len =   4 /* config->autoboot_enabled */ +
 273                 4 /* config->autoboot_timeout_sec */ +
 274                 4 /* config->safe_mode */;
 275
 276         len += 4;
 277         for (i = 0; i < config->network.n_interfaces; i++)
 278                 len += pb_protocol_interface_config_len(
 279                                 config->network.interfaces[i]);
 280
 281         len += 4;
 282         for (i = 0; i < config->network.n_dns_servers; i++)
 283                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 284
 285         len += 4;
 286         for (i = 0; i < config->n_autoboot_opts; i++) {
 287                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
 288                         len += 4 + 4;
 289                 else
 290                         len += 4 + 4 +
 291                                 optional_strlen(config->autoboot_opts[i].uuid);
 292         }
 293
 294         len += 4 + 4; /* ipmi_bootdev, ipmi_bootdev_persistent */
 295
 296         len += 4; /* allow_writes */
 297
 298         len += 4 + optional_strlen(config->lang);
 299
 300         return len;
 301 }
 302
 303 int pb_protocol_url_len(const char *url)
 304 {
 305         /* url + length field */
 306         return 4 + optional_strlen(url);
 307 }
 308
 309 int pb_protocol_serialise_device(const struct device *dev,
 310                 char *buf, int buf_len)
 311 {
 312         char *pos = buf;
 313
 314         pos += pb_protocol_serialise_string(pos, dev->id);
 315         *(enum device_type *)pos = dev->type;
 316         pos += sizeof(enum device_type);
 317         pos += pb_protocol_serialise_string(pos, dev->name);
 318         pos += pb_protocol_serialise_string(pos, dev->description);
 319         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 320
 321         assert(pos <= buf + buf_len);
 322         (void)buf_len;
 323
 324         return 0;
 325 }
 326
 327 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 328                 char *buf, int buf_len)
 329 {
 330         char *pos = buf;
 331
 332         pos += pb_protocol_serialise_string(pos, opt->device_id);
 333         pos += pb_protocol_serialise_string(pos, opt->id);
 334         pos += pb_protocol_serialise_string(pos, opt->name);
 335         pos += pb_protocol_serialise_string(pos, opt->description);
 336         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 337         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 338         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 339         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 340         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 341
 342         *(bool *)pos = opt->is_default;
 343         pos += sizeof(bool);
 344
 345         assert(pos <= buf + buf_len);
 346         (void)buf_len;
 347
 348         return 0;
 349 }
 350
 351 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 352                 char *buf, int buf_len)
 353 {
 354         char *pos = buf;
 355
 356         pos += pb_protocol_serialise_string(pos, boot->option_id);
 357         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 358         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 359         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 360         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 361
 362         assert(pos <= buf + buf_len);
 363         (void)buf_len;
 364
 365         return 0;
 366 }
 367
 368 int pb_protocol_serialise_boot_status(const struct boot_status *status,
 369                 char *buf, int buf_len)
 370 {
 371         char *pos = buf;
 372
 373         *(uint32_t *)pos = __cpu_to_be32(status->type);
 374         pos += sizeof(uint32_t);
 375
 376         pos += pb_protocol_serialise_string(pos, status->message);
 377         pos += pb_protocol_serialise_string(pos, status->detail);
 378
 379         *(uint32_t *)pos = __cpu_to_be32(status->type);
 380         pos += sizeof(uint32_t);
 381
 382         assert(pos <= buf + buf_len);
 383         (void)buf_len;
 384
 385         return 0;
 386 }
 387
 388 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 389                 char *buf, int buf_len)
 390 {
 391         char *pos = buf;
 392         unsigned int i;
 393
 394         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 395         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 396
 397         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 398         pos += sizeof(uint32_t);
 399
 400         for (i = 0; i < sysinfo->n_interfaces; i++) {
 401                 struct interface_info *if_info = sysinfo->interfaces[i];
 402
 403                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 404                 pos += sizeof(uint32_t);
 405
 406                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 407                 pos += if_info->hwaddr_size;
 408
 409                 pos += pb_protocol_serialise_string(pos, if_info->name);
 410
 411                 *(bool *)pos = if_info->link;
 412                 pos += sizeof(bool);
 413         }
 414
 415         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 416         pos += sizeof(uint32_t);
 417
 418         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 419                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 420
 421                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 422                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 423                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 424         }
 425
 426         memcpy(pos, sysinfo->bmc_mac, HWADDR_SIZE);
 427         pos += HWADDR_SIZE;
 428
 429         assert(pos <= buf + buf_len);
 430         (void)buf_len;
 431
 432         return 0;
 433 }
 434
 435 static int pb_protocol_serialise_config_interface(char *buf,
 436                 struct interface_config *conf)
 437 {
 438         char *pos = buf;
 439
 440         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 441         pos += sizeof(conf->hwaddr);
 442
 443         *(uint32_t *)pos = conf->ignore;
 444         pos += 4;
 445
 446         if (conf->ignore)
 447                 return pos - buf;
 448
 449         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 450         pos += 4;
 451
 452         if (conf->method == CONFIG_METHOD_STATIC) {
 453                 pos += pb_protocol_serialise_string(pos,
 454                                 conf->static_config.address);
 455                 pos += pb_protocol_serialise_string(pos,
 456                                 conf->static_config.gateway);
 457         }
 458
 459         return pos - buf;
 460 }
 461
 462 int pb_protocol_serialise_config(const struct config *config,
 463                 char *buf, int buf_len)
 464 {
 465         char *pos = buf;
 466         unsigned int i;
 467
 468         *(uint32_t *)pos = config->autoboot_enabled;
 469         pos += 4;
 470
 471         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 472         pos += 4;
 473
 474         *(uint32_t *)pos = config->safe_mode;
 475         pos += 4;
 476
 477         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 478         pos += 4;
 479         for (i = 0; i < config->network.n_interfaces; i++) {
 480                 struct interface_config *iface =
 481                         config->network.interfaces[i];
 482                 pos += pb_protocol_serialise_config_interface(pos, iface);
 483         }
 484
 485         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 486         pos += 4;
 487         for (i = 0; i < config->network.n_dns_servers; i++) {
 488                 pos += pb_protocol_serialise_string(pos,
 489                                 config->network.dns_servers[i]);
 490         }
 491
 492         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 493         pos += 4;
 494         for (i = 0; i < config->n_autoboot_opts; i++) {
 495                 *(uint32_t *)pos =
 496                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 497                 pos += 4;
 498                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 499                         *(uint32_t *)pos =
 500                                 __cpu_to_be32(config->autoboot_opts[i].type);
 501                         pos += 4;
 502                 } else {
 503                         pos += pb_protocol_serialise_string(pos,
 504                                                 config->autoboot_opts[i].uuid);
 505                 }
 506         }
 507
 508         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 509         pos += 4;
 510         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 511         pos += 4;
 512
 513         *(uint32_t *)pos = config->allow_writes;
 514         pos += 4;
 515
 516         pos += pb_protocol_serialise_string(pos, config->lang);
 517
 518         assert(pos <= buf + buf_len);
 519         (void)buf_len;
 520
 521         return 0;
 522 }
 523
 524 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 525 {
 526         char *pos = buf;
 527
 528         pos += pb_protocol_serialise_string(pos, url);
 529
 530         assert(pos <=buf+buf_len);
 531         (void)buf_len;
 532
 533         return 0;
 534 }
 535
 536 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 537 {
 538         int total_len, rc;
 539         char *pos;
 540
 541         total_len = sizeof(*message) + message->payload_len;
 542
 543         message->payload_len = __cpu_to_be32(message->payload_len);
 544         message->action = __cpu_to_be32(message->action);
 545
 546         for (pos = (void *)message; total_len;) {
 547                 rc = write(fd, pos, total_len);
 548
 549                 if (rc <= 0)
 550                         break;
 551
 552                 total_len -= rc;
 553                 pos += rc;
 554         }
 555
 556         talloc_free(message);
 557
 558         if (!total_len)
 559                 return 0;
 560
 561         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 562         return -1;
 563 }
 564
 565 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 566                 enum pb_protocol_action action, int payload_len)
 567 {
 568         struct pb_protocol_message *message;
 569
 570         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 571                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 572                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 573                 return NULL;
 574         }
 575
 576         message = talloc_size(ctx, sizeof(*message) + payload_len);
 577
 578         /* we convert these to big-endian in write_message() */
 579         message->action = action;
 580         message->payload_len = payload_len;
 581
 582         return message;
 583
 584 }
 585
 586 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 587 {
 588         struct pb_protocol_message *message, m;
 589         int rc;
 590         unsigned int len;
 591
 592         /* use the stack for the initial 8-byte read */
 593
 594         rc = read(fd, &m, sizeof(m));
 595         if (rc != sizeof(m))
 596                 return NULL;
 597
 598         m.payload_len = __be32_to_cpu(m.payload_len);
 599         m.action = __be32_to_cpu(m.action);
 600
 601         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 602                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 603                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 604                 return NULL;
 605         }
 606
 607         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 608         memcpy(message, &m, sizeof(m));
 609
 610         for (len = 0; len < m.payload_len;) {
 611                 rc = read(fd, message->payload + len, m.payload_len - len);
 612
 613                 if (rc <= 0) {
 614                         talloc_free(message);
 615                         pb_log("%s: failed (%u): %s\n", __func__, len,
 616                                 strerror(errno));
 617                         return NULL;
 618                 }
 619
 620                 len += rc;
 621         }
 622
 623         return message;
 624 }
 625
 626
 627 int pb_protocol_deserialise_device(struct device *dev,
 628                 const struct pb_protocol_message *message)
 629 {
 630         unsigned int len;
 631         const char *pos;
 632         int rc = -1;
 633
 634         len = message->payload_len;
 635         pos = message->payload;
 636
 637         if (read_string(dev, &pos, &len, &dev->id))
 638                 goto out;
 639
 640         if (len < sizeof(enum device_type))
 641                 goto out;
 642         dev->type = *(enum device_type *)(pos);
 643         pos += sizeof(enum device_type);
 644         len -= sizeof(enum device_type);
 645
 646         if (read_string(dev, &pos, &len, &dev->name))
 647                 goto out;
 648
 649         if (read_string(dev, &pos, &len, &dev->description))
 650                 goto out;
 651
 652         if (read_string(dev, &pos, &len, &dev->icon_file))
 653                 goto out;
 654
 655         rc = 0;
 656
 657 out:
 658         return rc;
 659 }
 660
 661 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 662                 const struct pb_protocol_message *message)
 663 {
 664         unsigned int len;
 665         const char *pos;
 666         int rc = -1;
 667
 668         len = message->payload_len;
 669         pos = message->payload;
 670
 671         if (read_string(opt, &pos, &len, &opt->device_id))
 672                 goto out;
 673
 674         if (read_string(opt, &pos, &len, &opt->id))
 675                 goto out;
 676
 677         if (read_string(opt, &pos, &len, &opt->name))
 678                 goto out;
 679
 680         if (read_string(opt, &pos, &len, &opt->description))
 681                 goto out;
 682
 683         if (read_string(opt, &pos, &len, &opt->icon_file))
 684                 goto out;
 685
 686         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 687                 goto out;
 688
 689         if (read_string(opt, &pos, &len, &opt->initrd_file))
 690                 goto out;
 691
 692         if (read_string(opt, &pos, &len, &opt->dtb_file))
 693                 goto out;
 694
 695         if (read_string(opt, &pos, &len, &opt->boot_args))
 696                 goto out;
 697
 698         if (len < sizeof(bool))
 699                 goto out;
 700         opt->is_default = *(bool *)(pos);
 701
 702         rc = 0;
 703
 704 out:
 705         return rc;
 706 }
 707
 708 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 709                 const struct pb_protocol_message *message)
 710 {
 711         unsigned int len;
 712         const char *pos;
 713         int rc = -1;
 714
 715         len = message->payload_len;
 716         pos = message->payload;
 717
 718         if (read_string(cmd, &pos, &len, &cmd->option_id))
 719                 goto out;
 720
 721         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 722                 goto out;
 723
 724         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 725                 goto out;
 726
 727         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 728                 goto out;
 729
 730         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 731                 goto out;
 732
 733         rc = 0;
 734
 735 out:
 736         return rc;
 737 }
 738
 739 int pb_protocol_deserialise_boot_status(struct boot_status *status,
 740                 const struct pb_protocol_message *message)
 741 {
 742         unsigned int len;
 743         const char *pos;
 744         int rc = -1;
 745
 746         len = message->payload_len;
 747         pos = message->payload;
 748
 749         /* first up, the type enum... */
 750         if (len < sizeof(uint32_t))
 751                 goto out;
 752
 753         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 754
 755         switch (status->type) {
 756         case BOOT_STATUS_ERROR:
 757         case BOOT_STATUS_INFO:
 758                 break;
 759         default:
 760                 goto out;
 761         }
 762
 763         pos += sizeof(uint32_t);
 764         len -= sizeof(uint32_t);
 765
 766         /* message and detail strings */
 767         if (read_string(status, &pos, &len, &status->message))
 768                 goto out;
 769
 770         if (read_string(status, &pos, &len, &status->detail))
 771                 goto out;
 772
 773         /* and finally, progress */
 774         if (len < sizeof(uint32_t))
 775                 goto out;
 776
 777         status->progress = __be32_to_cpu(*(uint32_t *)(pos));
 778
 779         /* clamp to 100% */
 780         if (status->progress > 100)
 781                 status->progress = 100;
 782
 783         rc = 0;
 784
 785 out:
 786         return rc;
 787 }
 788
 789 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 790                 const struct pb_protocol_message *message)
 791 {
 792         unsigned int len, i;
 793         const char *pos;
 794         int rc = -1;
 795
 796         len = message->payload_len;
 797         pos = message->payload;
 798
 799         /* type and identifier strings */
 800         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 801                 goto out;
 802
 803         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 804                 goto out;
 805
 806         /* number of interfaces */
 807         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 808                 goto out;
 809
 810         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 811                         sysinfo->n_interfaces);
 812
 813         for (i = 0; i < sysinfo->n_interfaces; i++) {
 814                 struct interface_info *if_info = talloc(sysinfo,
 815                                                         struct interface_info);
 816
 817                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 818                         goto out;
 819
 820                 if (len < if_info->hwaddr_size)
 821                         goto out;
 822
 823                 if_info->hwaddr = talloc_memdup(if_info, pos,
 824                                                 if_info->hwaddr_size);
 825                 pos += if_info->hwaddr_size;
 826                 len -= if_info->hwaddr_size;
 827
 828                 if (read_string(if_info, &pos, &len, &if_info->name))
 829                         goto out;
 830
 831                 if_info->link = *(bool *)pos;
 832                 pos += sizeof(if_info->link);
 833
 834                 sysinfo->interfaces[i] = if_info;
 835         }
 836
 837         /* number of interfaces */
 838         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 839                 goto out;
 840
 841         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 842                         sysinfo->n_blockdevs);
 843
 844         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 845                 struct blockdev_info *bd_info = talloc(sysinfo,
 846                                                         struct blockdev_info);
 847
 848                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 849                         goto out;
 850
 851                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 852                         goto out;
 853
 854                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 855                         goto out;
 856
 857                 sysinfo->blockdevs[i] = bd_info;
 858         }
 859
 860         for (i = 0; i < HWADDR_SIZE; i++) {
 861                 if (pos[i] != 0) {
 862                         sysinfo->bmc_mac = talloc_memdup(sysinfo, pos, HWADDR_SIZE);
 863                         break;
 864                 }
 865         }
 866
 867         pos += HWADDR_SIZE;
 868         len -= HWADDR_SIZE;
 869
 870         rc = 0;
 871 out:
 872         return rc;
 873 }
 874
 875 static int pb_protocol_deserialise_config_interface(const char **buf,
 876                 unsigned int *len, struct interface_config *iface)
 877 {
 878         unsigned int tmp;
 879
 880         if (*len < sizeof(iface->hwaddr))
 881                 return -1;
 882
 883         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 884         *buf += sizeof(iface->hwaddr);
 885         *len -= sizeof(iface->hwaddr);
 886
 887         if (read_u32(buf, len, &tmp))
 888                 return -1;
 889         iface->ignore = !!tmp;
 890
 891         if (iface->ignore)
 892                 return 0;
 893
 894         if (read_u32(buf, len, &iface->method))
 895                 return -1;
 896
 897         if (iface->method == CONFIG_METHOD_STATIC) {
 898                 if (read_string(iface, buf, len, &iface->static_config.address))
 899                         return -1;
 900
 901                 if (read_string(iface, buf, len, &iface->static_config.gateway))
 902                         return -1;
 903         }
 904
 905         return 0;
 906 }
 907
 908 int pb_protocol_deserialise_config(struct config *config,
 909                 const struct pb_protocol_message *message)
 910 {
 911         unsigned int len, i, tmp;
 912         const char *pos;
 913         int rc = -1;
 914         char *str;
 915
 916         len = message->payload_len;
 917         pos = message->payload;
 918
 919         if (read_u32(&pos, &len, &tmp))
 920                 goto out;
 921         config->autoboot_enabled = !!tmp;
 922
 923         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
 924                 goto out;
 925
 926         if (read_u32(&pos, &len, &tmp))
 927                 goto out;
 928         config->safe_mode = !!tmp;
 929
 930         if (read_u32(&pos, &len, &config->network.n_interfaces))
 931                 goto out;
 932
 933         config->network.interfaces = talloc_array(config,
 934                         struct interface_config *, config->network.n_interfaces);
 935
 936         for (i = 0; i < config->network.n_interfaces; i++) {
 937                 struct interface_config *iface = talloc_zero(
 938                                 config->network.interfaces,
 939                                 struct interface_config);
 940                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
 941                         goto out;
 942                 config->network.interfaces[i] = iface;
 943         }
 944
 945         if (read_u32(&pos, &len, &config->network.n_dns_servers))
 946                 goto out;
 947         config->network.dns_servers = talloc_array(config, const char *,
 948                         config->network.n_dns_servers);
 949
 950         for (i = 0; i < config->network.n_dns_servers; i++) {
 951                 if (read_string(config->network.dns_servers, &pos, &len, &str))
 952                         goto out;
 953                 config->network.dns_servers[i] = str;
 954         }
 955
 956         if (read_u32(&pos, &len, &config->n_autoboot_opts))
 957                 goto out;
 958         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 959                         config->n_autoboot_opts);
 960
 961         for (i = 0; i < config->n_autoboot_opts; i++) {
 962                 if (read_u32(&pos, &len, &tmp))
 963                         goto out;
 964                 config->autoboot_opts[i].boot_type = (int)tmp;
 965                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 966                         if (read_u32(&pos, &len, &tmp))
 967                                 goto out;
 968                         config->autoboot_opts[i].type = tmp;
 969                 } else {
 970                         if (read_string(config, &pos, &len, &str))
 971                                 goto out;
 972                         config->autoboot_opts[i].uuid = str;
 973                 }
 974         }
 975
 976         if (read_u32(&pos, &len, &config->ipmi_bootdev))
 977                 goto out;
 978         if (read_u32(&pos, &len, &tmp))
 979                 goto out;
 980         config->ipmi_bootdev_persistent = !!tmp;
 981
 982         if (read_u32(&pos, &len, &tmp))
 983                 goto out;
 984         config->allow_writes = !!tmp;
 985
 986         if (read_string(config, &pos, &len, &str))
 987                 goto out;
 988
 989         config->lang = str;
 990
 991         rc = 0;
 992
 993 out:
 994         return rc;
 995 }