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         if (sysinfo->bmc_mac)
 428                 memcpy(pos, sysinfo->bmc_mac, HWADDR_SIZE);
 429         else
 430                 memset(pos, 0, HWADDR_SIZE);
 431         pos += HWADDR_SIZE;
 432
 433         assert(pos <= buf + buf_len);
 434         (void)buf_len;
 435
 436         return 0;
 437 }
 438
 439 static int pb_protocol_serialise_config_interface(char *buf,
 440                 struct interface_config *conf)
 441 {
 442         char *pos = buf;
 443
 444         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 445         pos += sizeof(conf->hwaddr);
 446
 447         *(uint32_t *)pos = conf->ignore;
 448         pos += 4;
 449
 450         if (conf->ignore)
 451                 return pos - buf;
 452
 453         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 454         pos += 4;
 455
 456         if (conf->method == CONFIG_METHOD_STATIC) {
 457                 pos += pb_protocol_serialise_string(pos,
 458                                 conf->static_config.address);
 459                 pos += pb_protocol_serialise_string(pos,
 460                                 conf->static_config.gateway);
 461                 pos += pb_protocol_serialise_string(pos,
 462                                 conf->static_config.url);
 463         }
 464
 465         return pos - buf;
 466 }
 467
 468 int pb_protocol_serialise_config(const struct config *config,
 469                 char *buf, int buf_len)
 470 {
 471         char *pos = buf;
 472         unsigned int i;
 473
 474         *(uint32_t *)pos = config->autoboot_enabled;
 475         pos += 4;
 476
 477         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 478         pos += 4;
 479
 480         *(uint32_t *)pos = config->safe_mode;
 481         pos += 4;
 482
 483         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 484         pos += 4;
 485         for (i = 0; i < config->network.n_interfaces; i++) {
 486                 struct interface_config *iface =
 487                         config->network.interfaces[i];
 488                 pos += pb_protocol_serialise_config_interface(pos, iface);
 489         }
 490
 491         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 492         pos += 4;
 493         for (i = 0; i < config->network.n_dns_servers; i++) {
 494                 pos += pb_protocol_serialise_string(pos,
 495                                 config->network.dns_servers[i]);
 496         }
 497
 498         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 499         pos += 4;
 500         for (i = 0; i < config->n_autoboot_opts; i++) {
 501                 *(uint32_t *)pos =
 502                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 503                 pos += 4;
 504                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 505                         *(uint32_t *)pos =
 506                                 __cpu_to_be32(config->autoboot_opts[i].type);
 507                         pos += 4;
 508                 } else {
 509                         pos += pb_protocol_serialise_string(pos,
 510                                                 config->autoboot_opts[i].uuid);
 511                 }
 512         }
 513
 514         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 515         pos += 4;
 516         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 517         pos += 4;
 518
 519         *(uint32_t *)pos = config->allow_writes;
 520         pos += 4;
 521
 522         pos += pb_protocol_serialise_string(pos, config->lang);
 523
 524         assert(pos <= buf + buf_len);
 525         (void)buf_len;
 526
 527         return 0;
 528 }
 529
 530 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 531 {
 532         char *pos = buf;
 533
 534         pos += pb_protocol_serialise_string(pos, url);
 535
 536         assert(pos <=buf+buf_len);
 537         (void)buf_len;
 538
 539         return 0;
 540 }
 541
 542 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 543 {
 544         int total_len, rc;
 545         char *pos;
 546
 547         total_len = sizeof(*message) + message->payload_len;
 548
 549         message->payload_len = __cpu_to_be32(message->payload_len);
 550         message->action = __cpu_to_be32(message->action);
 551
 552         for (pos = (void *)message; total_len;) {
 553                 rc = write(fd, pos, total_len);
 554
 555                 if (rc <= 0)
 556                         break;
 557
 558                 total_len -= rc;
 559                 pos += rc;
 560         }
 561
 562         talloc_free(message);
 563
 564         if (!total_len)
 565                 return 0;
 566
 567         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 568         return -1;
 569 }
 570
 571 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 572                 enum pb_protocol_action action, int payload_len)
 573 {
 574         struct pb_protocol_message *message;
 575
 576         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 577                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 578                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 579                 return NULL;
 580         }
 581
 582         message = talloc_size(ctx, sizeof(*message) + payload_len);
 583
 584         /* we convert these to big-endian in write_message() */
 585         message->action = action;
 586         message->payload_len = payload_len;
 587
 588         return message;
 589
 590 }
 591
 592 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 593 {
 594         struct pb_protocol_message *message, m;
 595         int rc;
 596         unsigned int len;
 597
 598         /* use the stack for the initial 8-byte read */
 599
 600         rc = read(fd, &m, sizeof(m));
 601         if (rc != sizeof(m))
 602                 return NULL;
 603
 604         m.payload_len = __be32_to_cpu(m.payload_len);
 605         m.action = __be32_to_cpu(m.action);
 606
 607         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 608                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 609                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 610                 return NULL;
 611         }
 612
 613         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 614         memcpy(message, &m, sizeof(m));
 615
 616         for (len = 0; len < m.payload_len;) {
 617                 rc = read(fd, message->payload + len, m.payload_len - len);
 618
 619                 if (rc <= 0) {
 620                         talloc_free(message);
 621                         pb_log("%s: failed (%u): %s\n", __func__, len,
 622                                 strerror(errno));
 623                         return NULL;
 624                 }
 625
 626                 len += rc;
 627         }
 628
 629         return message;
 630 }
 631
 632
 633 int pb_protocol_deserialise_device(struct device *dev,
 634                 const struct pb_protocol_message *message)
 635 {
 636         unsigned int len;
 637         const char *pos;
 638         int rc = -1;
 639
 640         len = message->payload_len;
 641         pos = message->payload;
 642
 643         if (read_string(dev, &pos, &len, &dev->id))
 644                 goto out;
 645
 646         if (len < sizeof(enum device_type))
 647                 goto out;
 648         dev->type = *(enum device_type *)(pos);
 649         pos += sizeof(enum device_type);
 650         len -= sizeof(enum device_type);
 651
 652         if (read_string(dev, &pos, &len, &dev->name))
 653                 goto out;
 654
 655         if (read_string(dev, &pos, &len, &dev->description))
 656                 goto out;
 657
 658         if (read_string(dev, &pos, &len, &dev->icon_file))
 659                 goto out;
 660
 661         rc = 0;
 662
 663 out:
 664         return rc;
 665 }
 666
 667 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 668                 const struct pb_protocol_message *message)
 669 {
 670         unsigned int len;
 671         const char *pos;
 672         int rc = -1;
 673
 674         len = message->payload_len;
 675         pos = message->payload;
 676
 677         if (read_string(opt, &pos, &len, &opt->device_id))
 678                 goto out;
 679
 680         if (read_string(opt, &pos, &len, &opt->id))
 681                 goto out;
 682
 683         if (read_string(opt, &pos, &len, &opt->name))
 684                 goto out;
 685
 686         if (read_string(opt, &pos, &len, &opt->description))
 687                 goto out;
 688
 689         if (read_string(opt, &pos, &len, &opt->icon_file))
 690                 goto out;
 691
 692         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 693                 goto out;
 694
 695         if (read_string(opt, &pos, &len, &opt->initrd_file))
 696                 goto out;
 697
 698         if (read_string(opt, &pos, &len, &opt->dtb_file))
 699                 goto out;
 700
 701         if (read_string(opt, &pos, &len, &opt->boot_args))
 702                 goto out;
 703
 704         if (len < sizeof(bool))
 705                 goto out;
 706         opt->is_default = *(bool *)(pos);
 707
 708         rc = 0;
 709
 710 out:
 711         return rc;
 712 }
 713
 714 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 715                 const struct pb_protocol_message *message)
 716 {
 717         unsigned int len;
 718         const char *pos;
 719         int rc = -1;
 720
 721         len = message->payload_len;
 722         pos = message->payload;
 723
 724         if (read_string(cmd, &pos, &len, &cmd->option_id))
 725                 goto out;
 726
 727         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 728                 goto out;
 729
 730         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 731                 goto out;
 732
 733         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 734                 goto out;
 735
 736         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 737                 goto out;
 738
 739         rc = 0;
 740
 741 out:
 742         return rc;
 743 }
 744
 745 int pb_protocol_deserialise_boot_status(struct boot_status *status,
 746                 const struct pb_protocol_message *message)
 747 {
 748         unsigned int len;
 749         const char *pos;
 750         int rc = -1;
 751
 752         len = message->payload_len;
 753         pos = message->payload;
 754
 755         /* first up, the type enum... */
 756         if (len < sizeof(uint32_t))
 757                 goto out;
 758
 759         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 760
 761         switch (status->type) {
 762         case BOOT_STATUS_ERROR:
 763         case BOOT_STATUS_INFO:
 764                 break;
 765         default:
 766                 goto out;
 767         }
 768
 769         pos += sizeof(uint32_t);
 770         len -= sizeof(uint32_t);
 771
 772         /* message and detail strings */
 773         if (read_string(status, &pos, &len, &status->message))
 774                 goto out;
 775
 776         if (read_string(status, &pos, &len, &status->detail))
 777                 goto out;
 778
 779         /* and finally, progress */
 780         if (len < sizeof(uint32_t))
 781                 goto out;
 782
 783         status->progress = __be32_to_cpu(*(uint32_t *)(pos));
 784
 785         /* clamp to 100% */
 786         if (status->progress > 100)
 787                 status->progress = 100;
 788
 789         rc = 0;
 790
 791 out:
 792         return rc;
 793 }
 794
 795 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 796                 const struct pb_protocol_message *message)
 797 {
 798         unsigned int len, i;
 799         const char *pos;
 800         int rc = -1;
 801
 802         len = message->payload_len;
 803         pos = message->payload;
 804
 805         /* type and identifier strings */
 806         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 807                 goto out;
 808
 809         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 810                 goto out;
 811
 812         /* number of interfaces */
 813         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 814                 goto out;
 815
 816         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 817                         sysinfo->n_interfaces);
 818
 819         for (i = 0; i < sysinfo->n_interfaces; i++) {
 820                 struct interface_info *if_info = talloc(sysinfo,
 821                                                         struct interface_info);
 822
 823                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 824                         goto out;
 825
 826                 if (len < if_info->hwaddr_size)
 827                         goto out;
 828
 829                 if_info->hwaddr = talloc_memdup(if_info, pos,
 830                                                 if_info->hwaddr_size);
 831                 pos += if_info->hwaddr_size;
 832                 len -= if_info->hwaddr_size;
 833
 834                 if (read_string(if_info, &pos, &len, &if_info->name))
 835                         goto out;
 836
 837                 if_info->link = *(bool *)pos;
 838                 pos += sizeof(if_info->link);
 839
 840                 sysinfo->interfaces[i] = if_info;
 841         }
 842
 843         /* number of interfaces */
 844         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 845                 goto out;
 846
 847         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 848                         sysinfo->n_blockdevs);
 849
 850         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 851                 struct blockdev_info *bd_info = talloc(sysinfo,
 852                                                         struct blockdev_info);
 853
 854                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 855                         goto out;
 856
 857                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 858                         goto out;
 859
 860                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 861                         goto out;
 862
 863                 sysinfo->blockdevs[i] = bd_info;
 864         }
 865
 866         for (i = 0; i < HWADDR_SIZE; i++) {
 867                 if (pos[i] != 0) {
 868                         sysinfo->bmc_mac = talloc_memdup(sysinfo, pos, HWADDR_SIZE);
 869                         break;
 870                 }
 871         }
 872
 873         pos += HWADDR_SIZE;
 874         len -= HWADDR_SIZE;
 875
 876         rc = 0;
 877 out:
 878         return rc;
 879 }
 880
 881 static int pb_protocol_deserialise_config_interface(const char **buf,
 882                 unsigned int *len, struct interface_config *iface)
 883 {
 884         unsigned int tmp;
 885
 886         if (*len < sizeof(iface->hwaddr))
 887                 return -1;
 888
 889         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 890         *buf += sizeof(iface->hwaddr);
 891         *len -= sizeof(iface->hwaddr);
 892
 893         if (read_u32(buf, len, &tmp))
 894                 return -1;
 895         iface->ignore = !!tmp;
 896
 897         if (iface->ignore)
 898                 return 0;
 899
 900         if (read_u32(buf, len, &iface->method))
 901                 return -1;
 902
 903         if (iface->method == CONFIG_METHOD_STATIC) {
 904                 if (read_string(iface, buf, len, &iface->static_config.address))
 905                         return -1;
 906
 907                 if (read_string(iface, buf, len, &iface->static_config.gateway))
 908                         return -1;
 909
 910                 if (read_string(iface, buf, len, &iface->static_config.url))
 911                         return -1;
 912         }
 913
 914         return 0;
 915 }
 916
 917 int pb_protocol_deserialise_config(struct config *config,
 918                 const struct pb_protocol_message *message)
 919 {
 920         unsigned int len, i, tmp;
 921         const char *pos;
 922         int rc = -1;
 923         char *str;
 924
 925         len = message->payload_len;
 926         pos = message->payload;
 927
 928         if (read_u32(&pos, &len, &tmp))
 929                 goto out;
 930         config->autoboot_enabled = !!tmp;
 931
 932         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
 933                 goto out;
 934
 935         if (read_u32(&pos, &len, &tmp))
 936                 goto out;
 937         config->safe_mode = !!tmp;
 938
 939         if (read_u32(&pos, &len, &config->network.n_interfaces))
 940                 goto out;
 941
 942         config->network.interfaces = talloc_array(config,
 943                         struct interface_config *, config->network.n_interfaces);
 944
 945         for (i = 0; i < config->network.n_interfaces; i++) {
 946                 struct interface_config *iface = talloc_zero(
 947                                 config->network.interfaces,
 948                                 struct interface_config);
 949                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
 950                         goto out;
 951                 config->network.interfaces[i] = iface;
 952         }
 953
 954         if (read_u32(&pos, &len, &config->network.n_dns_servers))
 955                 goto out;
 956         config->network.dns_servers = talloc_array(config, const char *,
 957                         config->network.n_dns_servers);
 958
 959         for (i = 0; i < config->network.n_dns_servers; i++) {
 960                 if (read_string(config->network.dns_servers, &pos, &len, &str))
 961                         goto out;
 962                 config->network.dns_servers[i] = str;
 963         }
 964
 965         if (read_u32(&pos, &len, &config->n_autoboot_opts))
 966                 goto out;
 967         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 968                         config->n_autoboot_opts);
 969
 970         for (i = 0; i < config->n_autoboot_opts; i++) {
 971                 if (read_u32(&pos, &len, &tmp))
 972                         goto out;
 973                 config->autoboot_opts[i].boot_type = (int)tmp;
 974                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 975                         if (read_u32(&pos, &len, &tmp))
 976                                 goto out;
 977                         config->autoboot_opts[i].type = tmp;
 978                 } else {
 979                         if (read_string(config, &pos, &len, &str))
 980                                 goto out;
 981                         config->autoboot_opts[i].uuid = str;
 982                 }
 983         }
 984
 985         if (read_u32(&pos, &len, &config->ipmi_bootdev))
 986                 goto out;
 987         if (read_u32(&pos, &len, &tmp))
 988                 goto out;
 989         config->ipmi_bootdev_persistent = !!tmp;
 990
 991         if (read_u32(&pos, &len, &tmp))
 992                 goto out;
 993         config->allow_writes = !!tmp;
 994
 995         if (read_string(config, &pos, &len, &str))
 996                 goto out;
 997
 998         config->lang = str;
 999
1000         rc = 0;
1001
1002 out:
1003         return rc;
1004 }