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                 len += 4 + optional_strlen(conf->static_config.url);
 264         }
 265
 266         return len;
 267 }
 268
 269 int pb_protocol_config_len(const struct config *config)
 270 {
 271         unsigned int i, len;
 272
 273         len =   4 /* config->autoboot_enabled */ +
 274                 4 /* config->autoboot_timeout_sec */ +
 275                 4 /* config->safe_mode */;
 276
 277         len += 4;
 278         for (i = 0; i < config->network.n_interfaces; i++)
 279                 len += pb_protocol_interface_config_len(
 280                                 config->network.interfaces[i]);
 281
 282         len += 4;
 283         for (i = 0; i < config->network.n_dns_servers; i++)
 284                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 285
 286         len += 4;
 287         for (i = 0; i < config->n_autoboot_opts; i++) {
 288                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
 289                         len += 4 + 4;
 290                 else
 291                         len += 4 + 4 +
 292                                 optional_strlen(config->autoboot_opts[i].uuid);
 293         }
 294
 295         len += 4 + 4; /* ipmi_bootdev, ipmi_bootdev_persistent */
 296
 297         len += 4; /* allow_writes */
 298
 299         len += 4 + optional_strlen(config->lang);
 300
 301         return len;
 302 }
 303
 304 int pb_protocol_url_len(const char *url)
 305 {
 306         /* url + length field */
 307         return 4 + optional_strlen(url);
 308 }
 309
 310 int pb_protocol_serialise_device(const struct device *dev,
 311                 char *buf, int buf_len)
 312 {
 313         char *pos = buf;
 314
 315         pos += pb_protocol_serialise_string(pos, dev->id);
 316         *(enum device_type *)pos = dev->type;
 317         pos += sizeof(enum device_type);
 318         pos += pb_protocol_serialise_string(pos, dev->name);
 319         pos += pb_protocol_serialise_string(pos, dev->description);
 320         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 321
 322         assert(pos <= buf + buf_len);
 323         (void)buf_len;
 324
 325         return 0;
 326 }
 327
 328 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 329                 char *buf, int buf_len)
 330 {
 331         char *pos = buf;
 332
 333         pos += pb_protocol_serialise_string(pos, opt->device_id);
 334         pos += pb_protocol_serialise_string(pos, opt->id);
 335         pos += pb_protocol_serialise_string(pos, opt->name);
 336         pos += pb_protocol_serialise_string(pos, opt->description);
 337         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 338         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 339         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 340         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 341         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 342
 343         *(bool *)pos = opt->is_default;
 344         pos += sizeof(bool);
 345
 346         assert(pos <= buf + buf_len);
 347         (void)buf_len;
 348
 349         return 0;
 350 }
 351
 352 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 353                 char *buf, int buf_len)
 354 {
 355         char *pos = buf;
 356
 357         pos += pb_protocol_serialise_string(pos, boot->option_id);
 358         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 359         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 360         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 361         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 362
 363         assert(pos <= buf + buf_len);
 364         (void)buf_len;
 365
 366         return 0;
 367 }
 368
 369 int pb_protocol_serialise_boot_status(const struct boot_status *status,
 370                 char *buf, int buf_len)
 371 {
 372         char *pos = buf;
 373
 374         *(uint32_t *)pos = __cpu_to_be32(status->type);
 375         pos += sizeof(uint32_t);
 376
 377         pos += pb_protocol_serialise_string(pos, status->message);
 378         pos += pb_protocol_serialise_string(pos, status->detail);
 379
 380         *(uint32_t *)pos = __cpu_to_be32(status->type);
 381         pos += sizeof(uint32_t);
 382
 383         assert(pos <= buf + buf_len);
 384         (void)buf_len;
 385
 386         return 0;
 387 }
 388
 389 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 390                 char *buf, int buf_len)
 391 {
 392         char *pos = buf;
 393         unsigned int i;
 394
 395         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 396         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 397
 398         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 399         pos += sizeof(uint32_t);
 400
 401         for (i = 0; i < sysinfo->n_interfaces; i++) {
 402                 struct interface_info *if_info = sysinfo->interfaces[i];
 403
 404                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 405                 pos += sizeof(uint32_t);
 406
 407                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 408                 pos += if_info->hwaddr_size;
 409
 410                 pos += pb_protocol_serialise_string(pos, if_info->name);
 411
 412                 *(bool *)pos = if_info->link;
 413                 pos += sizeof(bool);
 414         }
 415
 416         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 417         pos += sizeof(uint32_t);
 418
 419         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 420                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 421
 422                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 423                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 424                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 425         }
 426
 427         memcpy(pos, sysinfo->bmc_mac, HWADDR_SIZE);
 428         pos += HWADDR_SIZE;
 429
 430         assert(pos <= buf + buf_len);
 431         (void)buf_len;
 432
 433         return 0;
 434 }
 435
 436 static int pb_protocol_serialise_config_interface(char *buf,
 437                 struct interface_config *conf)
 438 {
 439         char *pos = buf;
 440
 441         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 442         pos += sizeof(conf->hwaddr);
 443
 444         *(uint32_t *)pos = conf->ignore;
 445         pos += 4;
 446
 447         if (conf->ignore)
 448                 return pos - buf;
 449
 450         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 451         pos += 4;
 452
 453         if (conf->method == CONFIG_METHOD_STATIC) {
 454                 pos += pb_protocol_serialise_string(pos,
 455                                 conf->static_config.address);
 456                 pos += pb_protocol_serialise_string(pos,
 457                                 conf->static_config.gateway);
 458                 pos += pb_protocol_serialise_string(pos,
 459                                 conf->static_config.url);
 460         }
 461
 462         return pos - buf;
 463 }
 464
 465 int pb_protocol_serialise_config(const struct config *config,
 466                 char *buf, int buf_len)
 467 {
 468         char *pos = buf;
 469         unsigned int i;
 470
 471         *(uint32_t *)pos = config->autoboot_enabled;
 472         pos += 4;
 473
 474         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 475         pos += 4;
 476
 477         *(uint32_t *)pos = config->safe_mode;
 478         pos += 4;
 479
 480         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 481         pos += 4;
 482         for (i = 0; i < config->network.n_interfaces; i++) {
 483                 struct interface_config *iface =
 484                         config->network.interfaces[i];
 485                 pos += pb_protocol_serialise_config_interface(pos, iface);
 486         }
 487
 488         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 489         pos += 4;
 490         for (i = 0; i < config->network.n_dns_servers; i++) {
 491                 pos += pb_protocol_serialise_string(pos,
 492                                 config->network.dns_servers[i]);
 493         }
 494
 495         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 496         pos += 4;
 497         for (i = 0; i < config->n_autoboot_opts; i++) {
 498                 *(uint32_t *)pos =
 499                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 500                 pos += 4;
 501                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 502                         *(uint32_t *)pos =
 503                                 __cpu_to_be32(config->autoboot_opts[i].type);
 504                         pos += 4;
 505                 } else {
 506                         pos += pb_protocol_serialise_string(pos,
 507                                                 config->autoboot_opts[i].uuid);
 508                 }
 509         }
 510
 511         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 512         pos += 4;
 513         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 514         pos += 4;
 515
 516         *(uint32_t *)pos = config->allow_writes;
 517         pos += 4;
 518
 519         pos += pb_protocol_serialise_string(pos, config->lang);
 520
 521         assert(pos <= buf + buf_len);
 522         (void)buf_len;
 523
 524         return 0;
 525 }
 526
 527 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 528 {
 529         char *pos = buf;
 530
 531         pos += pb_protocol_serialise_string(pos, url);
 532
 533         assert(pos <=buf+buf_len);
 534         (void)buf_len;
 535
 536         return 0;
 537 }
 538
 539 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 540 {
 541         int total_len, rc;
 542         char *pos;
 543
 544         total_len = sizeof(*message) + message->payload_len;
 545
 546         message->payload_len = __cpu_to_be32(message->payload_len);
 547         message->action = __cpu_to_be32(message->action);
 548
 549         for (pos = (void *)message; total_len;) {
 550                 rc = write(fd, pos, total_len);
 551
 552                 if (rc <= 0)
 553                         break;
 554
 555                 total_len -= rc;
 556                 pos += rc;
 557         }
 558
 559         talloc_free(message);
 560
 561         if (!total_len)
 562                 return 0;
 563
 564         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 565         return -1;
 566 }
 567
 568 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 569                 enum pb_protocol_action action, int payload_len)
 570 {
 571         struct pb_protocol_message *message;
 572
 573         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 574                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 575                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 576                 return NULL;
 577         }
 578
 579         message = talloc_size(ctx, sizeof(*message) + payload_len);
 580
 581         /* we convert these to big-endian in write_message() */
 582         message->action = action;
 583         message->payload_len = payload_len;
 584
 585         return message;
 586
 587 }
 588
 589 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 590 {
 591         struct pb_protocol_message *message, m;
 592         int rc;
 593         unsigned int len;
 594
 595         /* use the stack for the initial 8-byte read */
 596
 597         rc = read(fd, &m, sizeof(m));
 598         if (rc != sizeof(m))
 599                 return NULL;
 600
 601         m.payload_len = __be32_to_cpu(m.payload_len);
 602         m.action = __be32_to_cpu(m.action);
 603
 604         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 605                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 606                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 607                 return NULL;
 608         }
 609
 610         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 611         memcpy(message, &m, sizeof(m));
 612
 613         for (len = 0; len < m.payload_len;) {
 614                 rc = read(fd, message->payload + len, m.payload_len - len);
 615
 616                 if (rc <= 0) {
 617                         talloc_free(message);
 618                         pb_log("%s: failed (%u): %s\n", __func__, len,
 619                                 strerror(errno));
 620                         return NULL;
 621                 }
 622
 623                 len += rc;
 624         }
 625
 626         return message;
 627 }
 628
 629
 630 int pb_protocol_deserialise_device(struct device *dev,
 631                 const struct pb_protocol_message *message)
 632 {
 633         unsigned int len;
 634         const char *pos;
 635         int rc = -1;
 636
 637         len = message->payload_len;
 638         pos = message->payload;
 639
 640         if (read_string(dev, &pos, &len, &dev->id))
 641                 goto out;
 642
 643         if (len < sizeof(enum device_type))
 644                 goto out;
 645         dev->type = *(enum device_type *)(pos);
 646         pos += sizeof(enum device_type);
 647         len -= sizeof(enum device_type);
 648
 649         if (read_string(dev, &pos, &len, &dev->name))
 650                 goto out;
 651
 652         if (read_string(dev, &pos, &len, &dev->description))
 653                 goto out;
 654
 655         if (read_string(dev, &pos, &len, &dev->icon_file))
 656                 goto out;
 657
 658         rc = 0;
 659
 660 out:
 661         return rc;
 662 }
 663
 664 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 665                 const struct pb_protocol_message *message)
 666 {
 667         unsigned int len;
 668         const char *pos;
 669         int rc = -1;
 670
 671         len = message->payload_len;
 672         pos = message->payload;
 673
 674         if (read_string(opt, &pos, &len, &opt->device_id))
 675                 goto out;
 676
 677         if (read_string(opt, &pos, &len, &opt->id))
 678                 goto out;
 679
 680         if (read_string(opt, &pos, &len, &opt->name))
 681                 goto out;
 682
 683         if (read_string(opt, &pos, &len, &opt->description))
 684                 goto out;
 685
 686         if (read_string(opt, &pos, &len, &opt->icon_file))
 687                 goto out;
 688
 689         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 690                 goto out;
 691
 692         if (read_string(opt, &pos, &len, &opt->initrd_file))
 693                 goto out;
 694
 695         if (read_string(opt, &pos, &len, &opt->dtb_file))
 696                 goto out;
 697
 698         if (read_string(opt, &pos, &len, &opt->boot_args))
 699                 goto out;
 700
 701         if (len < sizeof(bool))
 702                 goto out;
 703         opt->is_default = *(bool *)(pos);
 704
 705         rc = 0;
 706
 707 out:
 708         return rc;
 709 }
 710
 711 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 712                 const struct pb_protocol_message *message)
 713 {
 714         unsigned int len;
 715         const char *pos;
 716         int rc = -1;
 717
 718         len = message->payload_len;
 719         pos = message->payload;
 720
 721         if (read_string(cmd, &pos, &len, &cmd->option_id))
 722                 goto out;
 723
 724         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 725                 goto out;
 726
 727         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 728                 goto out;
 729
 730         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 731                 goto out;
 732
 733         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 734                 goto out;
 735
 736         rc = 0;
 737
 738 out:
 739         return rc;
 740 }
 741
 742 int pb_protocol_deserialise_boot_status(struct boot_status *status,
 743                 const struct pb_protocol_message *message)
 744 {
 745         unsigned int len;
 746         const char *pos;
 747         int rc = -1;
 748
 749         len = message->payload_len;
 750         pos = message->payload;
 751
 752         /* first up, the type enum... */
 753         if (len < sizeof(uint32_t))
 754                 goto out;
 755
 756         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 757
 758         switch (status->type) {
 759         case BOOT_STATUS_ERROR:
 760         case BOOT_STATUS_INFO:
 761                 break;
 762         default:
 763                 goto out;
 764         }
 765
 766         pos += sizeof(uint32_t);
 767         len -= sizeof(uint32_t);
 768
 769         /* message and detail strings */
 770         if (read_string(status, &pos, &len, &status->message))
 771                 goto out;
 772
 773         if (read_string(status, &pos, &len, &status->detail))
 774                 goto out;
 775
 776         /* and finally, progress */
 777         if (len < sizeof(uint32_t))
 778                 goto out;
 779
 780         status->progress = __be32_to_cpu(*(uint32_t *)(pos));
 781
 782         /* clamp to 100% */
 783         if (status->progress > 100)
 784                 status->progress = 100;
 785
 786         rc = 0;
 787
 788 out:
 789         return rc;
 790 }
 791
 792 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 793                 const struct pb_protocol_message *message)
 794 {
 795         unsigned int len, i;
 796         const char *pos;
 797         int rc = -1;
 798
 799         len = message->payload_len;
 800         pos = message->payload;
 801
 802         /* type and identifier strings */
 803         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 804                 goto out;
 805
 806         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 807                 goto out;
 808
 809         /* number of interfaces */
 810         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 811                 goto out;
 812
 813         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 814                         sysinfo->n_interfaces);
 815
 816         for (i = 0; i < sysinfo->n_interfaces; i++) {
 817                 struct interface_info *if_info = talloc(sysinfo,
 818                                                         struct interface_info);
 819
 820                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 821                         goto out;
 822
 823                 if (len < if_info->hwaddr_size)
 824                         goto out;
 825
 826                 if_info->hwaddr = talloc_memdup(if_info, pos,
 827                                                 if_info->hwaddr_size);
 828                 pos += if_info->hwaddr_size;
 829                 len -= if_info->hwaddr_size;
 830
 831                 if (read_string(if_info, &pos, &len, &if_info->name))
 832                         goto out;
 833
 834                 if_info->link = *(bool *)pos;
 835                 pos += sizeof(if_info->link);
 836
 837                 sysinfo->interfaces[i] = if_info;
 838         }
 839
 840         /* number of interfaces */
 841         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 842                 goto out;
 843
 844         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 845                         sysinfo->n_blockdevs);
 846
 847         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 848                 struct blockdev_info *bd_info = talloc(sysinfo,
 849                                                         struct blockdev_info);
 850
 851                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 852                         goto out;
 853
 854                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 855                         goto out;
 856
 857                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 858                         goto out;
 859
 860                 sysinfo->blockdevs[i] = bd_info;
 861         }
 862
 863         for (i = 0; i < HWADDR_SIZE; i++) {
 864                 if (pos[i] != 0) {
 865                         sysinfo->bmc_mac = talloc_memdup(sysinfo, pos, HWADDR_SIZE);
 866                         break;
 867                 }
 868         }
 869
 870         pos += HWADDR_SIZE;
 871         len -= HWADDR_SIZE;
 872
 873         rc = 0;
 874 out:
 875         return rc;
 876 }
 877
 878 static int pb_protocol_deserialise_config_interface(const char **buf,
 879                 unsigned int *len, struct interface_config *iface)
 880 {
 881         unsigned int tmp;
 882
 883         if (*len < sizeof(iface->hwaddr))
 884                 return -1;
 885
 886         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 887         *buf += sizeof(iface->hwaddr);
 888         *len -= sizeof(iface->hwaddr);
 889
 890         if (read_u32(buf, len, &tmp))
 891                 return -1;
 892         iface->ignore = !!tmp;
 893
 894         if (iface->ignore)
 895                 return 0;
 896
 897         if (read_u32(buf, len, &iface->method))
 898                 return -1;
 899
 900         if (iface->method == CONFIG_METHOD_STATIC) {
 901                 if (read_string(iface, buf, len, &iface->static_config.address))
 902                         return -1;
 903
 904                 if (read_string(iface, buf, len, &iface->static_config.gateway))
 905                         return -1;
 906
 907                 if (read_string(iface, buf, len, &iface->static_config.url))
 908                         return -1;
 909         }
 910
 911         return 0;
 912 }
 913
 914 int pb_protocol_deserialise_config(struct config *config,
 915                 const struct pb_protocol_message *message)
 916 {
 917         unsigned int len, i, tmp;
 918         const char *pos;
 919         int rc = -1;
 920         char *str;
 921
 922         len = message->payload_len;
 923         pos = message->payload;
 924
 925         if (read_u32(&pos, &len, &tmp))
 926                 goto out;
 927         config->autoboot_enabled = !!tmp;
 928
 929         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
 930                 goto out;
 931
 932         if (read_u32(&pos, &len, &tmp))
 933                 goto out;
 934         config->safe_mode = !!tmp;
 935
 936         if (read_u32(&pos, &len, &config->network.n_interfaces))
 937                 goto out;
 938
 939         config->network.interfaces = talloc_array(config,
 940                         struct interface_config *, config->network.n_interfaces);
 941
 942         for (i = 0; i < config->network.n_interfaces; i++) {
 943                 struct interface_config *iface = talloc_zero(
 944                                 config->network.interfaces,
 945                                 struct interface_config);
 946                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
 947                         goto out;
 948                 config->network.interfaces[i] = iface;
 949         }
 950
 951         if (read_u32(&pos, &len, &config->network.n_dns_servers))
 952                 goto out;
 953         config->network.dns_servers = talloc_array(config, const char *,
 954                         config->network.n_dns_servers);
 955
 956         for (i = 0; i < config->network.n_dns_servers; i++) {
 957                 if (read_string(config->network.dns_servers, &pos, &len, &str))
 958                         goto out;
 959                 config->network.dns_servers[i] = str;
 960         }
 961
 962         if (read_u32(&pos, &len, &config->n_autoboot_opts))
 963                 goto out;
 964         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 965                         config->n_autoboot_opts);
 966
 967         for (i = 0; i < config->n_autoboot_opts; i++) {
 968                 if (read_u32(&pos, &len, &tmp))
 969                         goto out;
 970                 config->autoboot_opts[i].boot_type = (int)tmp;
 971                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 972                         if (read_u32(&pos, &len, &tmp))
 973                                 goto out;
 974                         config->autoboot_opts[i].type = tmp;
 975                 } else {
 976                         if (read_string(config, &pos, &len, &str))
 977                                 goto out;
 978                         config->autoboot_opts[i].uuid = str;
 979                 }
 980         }
 981
 982         if (read_u32(&pos, &len, &config->ipmi_bootdev))
 983                 goto out;
 984         if (read_u32(&pos, &len, &tmp))
 985                 goto out;
 986         config->ipmi_bootdev_persistent = !!tmp;
 987
 988         if (read_u32(&pos, &len, &tmp))
 989                 goto out;
 990         config->allow_writes = !!tmp;
 991
 992         if (read_string(config, &pos, &len, &str))
 993                 goto out;
 994
 995         config->lang = str;
 996
 997         rc = 0;
 998
 999 out:
1000         return rc;
1001 }