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  *    4-byte len, args_sig_file
  41  *
  42  * action = 0x2: device remove message
  43  *  payload:
  44  *   4-byte len, id
  45  *
  46  * action = 0x3: boot
  47  *  payload:
  48  *   4-byte len, boot option id
  49  *   4-byte len, boot_image_file
  50  *   4-byte len, initrd_file
  51  *   4-byte len, dtb_file
  52  *   4-byte len, boot_args
  53  *   4-byte len, args_sig_file
  54  *
  55  */
  56
  57 void pb_protocol_dump_device(const struct device *dev, const char *text,
  58         FILE *stream)
  59 {
  60         struct boot_option *opt;
  61
  62         fprintf(stream, "%snew dev:\n", text);
  63         fprintf(stream, "%s\tid:   %s\n", text, dev->id);
  64         fprintf(stream, "%s\tname: %s\n", text, dev->name);
  65         fprintf(stream, "%s\tdesc: %s\n", text, dev->description);
  66         fprintf(stream, "%s\ticon: %s\n", text, dev->icon_file);
  67         fprintf(stream, "%s\tboot options:\n", text);
  68         list_for_each_entry(&dev->boot_options, opt, list) {
  69                 fprintf(stream, "%s\t\tid:   %s\n", text, opt->id);
  70                 fprintf(stream, "%s\t\tname: %s\n", text, opt->name);
  71                 fprintf(stream, "%s\t\tdesc: %s\n", text, opt->description);
  72                 fprintf(stream, "%s\t\ticon: %s\n", text, opt->icon_file);
  73                 fprintf(stream, "%s\t\tboot: %s\n", text, opt->boot_image_file);
  74                 fprintf(stream, "%s\t\tinit: %s\n", text, opt->initrd_file);
  75                 fprintf(stream, "%s\t\tdtb:  %s\n", text, opt->dtb_file);
  76                 fprintf(stream, "%s\t\targs: %s\n", text, opt->boot_args);
  77                 fprintf(stream, "%s\t\tasig: %s\n", text, opt->args_sig_file);
  78         }
  79 }
  80
  81 int pb_protocol_device_cmp(const struct device *a, const struct device *b)
  82 {
  83         return !strcmp(a->id, b->id);
  84 }
  85
  86 int pb_protocol_boot_option_cmp(const struct boot_option *a,
  87         const struct boot_option *b)
  88 {
  89         return !strcmp(a->id, b->id);
  90 }
  91
  92 /* Write a string into the buffer, starting at pos.
  93  *
  94  * Returns the total length used for the write, including length header.
  95  */
  96 int pb_protocol_serialise_string(char *pos, const char *str)
  97 {
  98         int len = 0;
  99
 100         if (str)
 101                 len = strlen(str);
 102
 103         *(uint32_t *)pos = __cpu_to_be32(len);
 104         pos += sizeof(uint32_t);
 105
 106         memcpy(pos, str, len);
 107
 108         return len + sizeof(uint32_t);
 109 }
 110
 111 /* Read a string from a buffer, allocating the new string as necessary.
 112  *
 113  * @param[in] ctx       The talloc context to base the allocation on
 114  * @param[in,out] pos   Where to start reading
 115  * @param[in,out] len   The amount of data remaining in the buffer
 116  * @param[out] str      Pointer to resuling string
 117  * @return              zero on success, non-zero on failure
 118  */
 119 static int read_string(void *ctx, const char **pos, unsigned int *len,
 120         char **str)
 121 {
 122         uint32_t str_len, read_len;
 123
 124         if (*len < sizeof(uint32_t))
 125                 return -1;
 126
 127         str_len = __be32_to_cpu(*(uint32_t *)(*pos));
 128         read_len = sizeof(uint32_t);
 129
 130         if (read_len + str_len > *len)
 131                 return -1;
 132
 133         if (str_len == 0)
 134                 *str = NULL;
 135         else
 136                 *str = talloc_strndup(ctx, *pos + read_len, str_len);
 137
 138         read_len += str_len;
 139
 140         /* all ok, update the caller's pointers */
 141         *pos += read_len;
 142         *len -= read_len;
 143
 144         return 0;
 145 }
 146
 147 static int read_u32(const char **pos, unsigned int *len, unsigned int *p)
 148 {
 149         if (*len < sizeof(uint32_t))
 150                 return -1;
 151
 152         *p = (unsigned int)__be32_to_cpu(*(uint32_t *)(*pos));
 153         *pos += sizeof(uint32_t);
 154         *len -= sizeof(uint32_t);
 155
 156         return 0;
 157 }
 158
 159 char *pb_protocol_deserialise_string(void *ctx,
 160                 const struct pb_protocol_message *message)
 161 {
 162         const char *buf;
 163         char *str;
 164         unsigned int len;
 165
 166         len = message->payload_len;
 167         buf = message->payload;
 168
 169         if (read_string(ctx, &buf, &len, &str))
 170                 return NULL;
 171
 172         return str;
 173 }
 174
 175 static int optional_strlen(const char *str)
 176 {
 177         if (!str)
 178                 return 0;
 179         return strlen(str);
 180 }
 181
 182 int pb_protocol_device_len(const struct device *dev)
 183 {
 184         return  4 + optional_strlen(dev->id) +
 185                 sizeof(dev->type) +
 186                 4 + optional_strlen(dev->name) +
 187                 4 + optional_strlen(dev->description) +
 188                 4 + optional_strlen(dev->icon_file);
 189 }
 190
 191 int pb_protocol_boot_option_len(const struct boot_option *opt)
 192 {
 193
 194         return  4 + optional_strlen(opt->device_id) +
 195                 4 + optional_strlen(opt->id) +
 196                 4 + optional_strlen(opt->name) +
 197                 4 + optional_strlen(opt->description) +
 198                 4 + optional_strlen(opt->icon_file) +
 199                 4 + optional_strlen(opt->boot_image_file) +
 200                 4 + optional_strlen(opt->initrd_file) +
 201                 4 + optional_strlen(opt->dtb_file) +
 202                 4 + optional_strlen(opt->boot_args) +
 203                 4 + optional_strlen(opt->args_sig_file) +
 204                 sizeof(opt->is_default);
 205 }
 206
 207 int pb_protocol_boot_len(const struct boot_command *boot)
 208 {
 209         return  4 + optional_strlen(boot->option_id) +
 210                 4 + optional_strlen(boot->boot_image_file) +
 211                 4 + optional_strlen(boot->initrd_file) +
 212                 4 + optional_strlen(boot->dtb_file) +
 213                 4 + optional_strlen(boot->boot_args) +
 214                 4 + optional_strlen(boot->args_sig_file) +
 215                 4 + optional_strlen(boot->tty);
 216 }
 217
 218 int pb_protocol_boot_status_len(const struct boot_status *status)
 219 {
 220         return  4 +
 221                 4 + optional_strlen(status->message) +
 222                 4 + optional_strlen(status->detail) +
 223                 4;
 224 }
 225
 226 int pb_protocol_system_info_len(const struct system_info *sysinfo)
 227 {
 228         unsigned int len, i;
 229
 230         len =   4 + optional_strlen(sysinfo->type) +
 231                 4 + optional_strlen(sysinfo->identifier) +
 232                 4 + 4;
 233
 234         len +=  4;
 235         for (i = 0; i < sysinfo->n_primary; i++)
 236                 len += 4 + optional_strlen(sysinfo->platform_primary[i]);
 237         len +=  4;
 238         for (i = 0; i < sysinfo->n_other; i++)
 239                 len += 4 + optional_strlen(sysinfo->platform_other[i]);
 240
 241         len +=  4;
 242         for (i = 0; i < sysinfo->n_bmc_current; i++)
 243                 len += 4 + optional_strlen(sysinfo->bmc_current[i]);
 244         len +=  4;
 245         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 246                 len += 4 + optional_strlen(sysinfo->bmc_golden[i]);
 247
 248         for (i = 0; i < sysinfo->n_interfaces; i++) {
 249                 struct interface_info *if_info = sysinfo->interfaces[i];
 250                 len +=  4 + if_info->hwaddr_size +
 251                         4 + optional_strlen(if_info->name) +
 252                         sizeof(if_info->link);
 253         }
 254
 255         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 256                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 257                 len +=  4 + optional_strlen(bd_info->name) +
 258                         4 + optional_strlen(bd_info->uuid) +
 259                         4 + optional_strlen(bd_info->mountpoint);
 260         }
 261
 262         /* BMC MAC */
 263         len += HWADDR_SIZE;
 264
 265         return len;
 266 }
 267
 268 static int pb_protocol_interface_config_len(struct interface_config *conf)
 269 {
 270         unsigned int len;
 271
 272         len =   sizeof(conf->hwaddr) +
 273                 4 /* conf->ignore */;
 274
 275         if (conf->ignore)
 276                 return len;
 277
 278         len += 4 /* conf->method */;
 279
 280         if (conf->method == CONFIG_METHOD_STATIC) {
 281                 len += 4 + optional_strlen(conf->static_config.address);
 282                 len += 4 + optional_strlen(conf->static_config.gateway);
 283                 len += 4 + optional_strlen(conf->static_config.url);
 284         }
 285
 286         return len;
 287 }
 288
 289 int pb_protocol_config_len(const struct config *config)
 290 {
 291         unsigned int i, len;
 292
 293         len =   4 /* config->autoboot_enabled */ +
 294                 4 /* config->autoboot_timeout_sec */ +
 295                 4 /* config->safe_mode */;
 296
 297         len += 4;
 298         for (i = 0; i < config->network.n_interfaces; i++)
 299                 len += pb_protocol_interface_config_len(
 300                                 config->network.interfaces[i]);
 301
 302         len += 4;
 303         for (i = 0; i < config->network.n_dns_servers; i++)
 304                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 305
 306         len += 4;
 307         for (i = 0; i < config->n_autoboot_opts; i++) {
 308                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
 309                         len += 4 + 4;
 310                 else
 311                         len += 4 + 4 +
 312                                 optional_strlen(config->autoboot_opts[i].uuid);
 313         }
 314
 315         len += 4 + 4; /* ipmi_bootdev, ipmi_bootdev_persistent */
 316
 317         len += 4; /* allow_writes */
 318
 319         len += 4; /* n_tty */
 320         for (i = 0; i < config->n_tty; i++)
 321                 len += 4 + optional_strlen(config->tty_list[i]);
 322
 323         len += 4 + optional_strlen(config->boot_tty);
 324
 325         len += 4 + optional_strlen(config->lang);
 326
 327         return len;
 328 }
 329
 330 int pb_protocol_url_len(const char *url)
 331 {
 332         /* url + length field */
 333         return 4 + optional_strlen(url);
 334 }
 335
 336 int pb_protocol_serialise_device(const struct device *dev,
 337                 char *buf, int buf_len)
 338 {
 339         char *pos = buf;
 340
 341         pos += pb_protocol_serialise_string(pos, dev->id);
 342         *(enum device_type *)pos = dev->type;
 343         pos += sizeof(enum device_type);
 344         pos += pb_protocol_serialise_string(pos, dev->name);
 345         pos += pb_protocol_serialise_string(pos, dev->description);
 346         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 347
 348         assert(pos <= buf + buf_len);
 349         (void)buf_len;
 350
 351         return 0;
 352 }
 353
 354 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 355                 char *buf, int buf_len)
 356 {
 357         char *pos = buf;
 358
 359         pos += pb_protocol_serialise_string(pos, opt->device_id);
 360         pos += pb_protocol_serialise_string(pos, opt->id);
 361         pos += pb_protocol_serialise_string(pos, opt->name);
 362         pos += pb_protocol_serialise_string(pos, opt->description);
 363         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 364         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 365         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 366         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 367         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 368         pos += pb_protocol_serialise_string(pos, opt->args_sig_file);
 369
 370         *(bool *)pos = opt->is_default;
 371         pos += sizeof(bool);
 372
 373         assert(pos <= buf + buf_len);
 374         (void)buf_len;
 375
 376         return 0;
 377 }
 378
 379 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 380                 char *buf, int buf_len)
 381 {
 382         char *pos = buf;
 383
 384         pos += pb_protocol_serialise_string(pos, boot->option_id);
 385         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 386         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 387         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 388         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 389         pos += pb_protocol_serialise_string(pos, boot->args_sig_file);
 390         pos += pb_protocol_serialise_string(pos, boot->tty);
 391
 392         assert(pos <= buf + buf_len);
 393         (void)buf_len;
 394
 395         return 0;
 396 }
 397
 398 int pb_protocol_serialise_boot_status(const struct boot_status *status,
 399                 char *buf, int buf_len)
 400 {
 401         char *pos = buf;
 402
 403         *(uint32_t *)pos = __cpu_to_be32(status->type);
 404         pos += sizeof(uint32_t);
 405
 406         pos += pb_protocol_serialise_string(pos, status->message);
 407         pos += pb_protocol_serialise_string(pos, status->detail);
 408
 409         *(uint32_t *)pos = __cpu_to_be32(status->type);
 410         pos += sizeof(uint32_t);
 411
 412         assert(pos <= buf + buf_len);
 413         (void)buf_len;
 414
 415         return 0;
 416 }
 417
 418 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 419                 char *buf, int buf_len)
 420 {
 421         char *pos = buf;
 422         unsigned int i;
 423
 424         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 425         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 426
 427         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_primary);
 428         pos += sizeof(uint32_t);
 429         for (i = 0; i < sysinfo->n_primary; i++)
 430                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_primary[i]);
 431
 432         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_other);
 433         pos += sizeof(uint32_t);
 434         for (i = 0; i < sysinfo->n_other; i++)
 435                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_other[i]);
 436
 437         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_current);
 438         pos += sizeof(uint32_t);
 439         for (i = 0; i < sysinfo->n_bmc_current; i++)
 440                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_current[i]);
 441
 442         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_golden);
 443         pos += sizeof(uint32_t);
 444         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 445                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_golden[i]);
 446
 447         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 448         pos += sizeof(uint32_t);
 449
 450         for (i = 0; i < sysinfo->n_interfaces; i++) {
 451                 struct interface_info *if_info = sysinfo->interfaces[i];
 452
 453                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 454                 pos += sizeof(uint32_t);
 455
 456                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 457                 pos += if_info->hwaddr_size;
 458
 459                 pos += pb_protocol_serialise_string(pos, if_info->name);
 460
 461                 *(bool *)pos = if_info->link;
 462                 pos += sizeof(bool);
 463         }
 464
 465         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 466         pos += sizeof(uint32_t);
 467
 468         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 469                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 470
 471                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 472                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 473                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 474         }
 475
 476         if (sysinfo->bmc_mac)
 477                 memcpy(pos, sysinfo->bmc_mac, HWADDR_SIZE);
 478         else
 479                 memset(pos, 0, HWADDR_SIZE);
 480         pos += HWADDR_SIZE;
 481
 482         assert(pos <= buf + buf_len);
 483         (void)buf_len;
 484
 485         return 0;
 486 }
 487
 488 static int pb_protocol_serialise_config_interface(char *buf,
 489                 struct interface_config *conf)
 490 {
 491         char *pos = buf;
 492
 493         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 494         pos += sizeof(conf->hwaddr);
 495
 496         *(uint32_t *)pos = conf->ignore;
 497         pos += 4;
 498
 499         if (conf->ignore)
 500                 return pos - buf;
 501
 502         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 503         pos += 4;
 504
 505         if (conf->method == CONFIG_METHOD_STATIC) {
 506                 pos += pb_protocol_serialise_string(pos,
 507                                 conf->static_config.address);
 508                 pos += pb_protocol_serialise_string(pos,
 509                                 conf->static_config.gateway);
 510                 pos += pb_protocol_serialise_string(pos,
 511                                 conf->static_config.url);
 512         }
 513
 514         return pos - buf;
 515 }
 516
 517 int pb_protocol_serialise_config(const struct config *config,
 518                 char *buf, int buf_len)
 519 {
 520         char *pos = buf;
 521         unsigned int i;
 522
 523         *(uint32_t *)pos = config->autoboot_enabled;
 524         pos += 4;
 525
 526         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 527         pos += 4;
 528
 529         *(uint32_t *)pos = config->safe_mode;
 530         pos += 4;
 531
 532         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 533         pos += 4;
 534         for (i = 0; i < config->network.n_interfaces; i++) {
 535                 struct interface_config *iface =
 536                         config->network.interfaces[i];
 537                 pos += pb_protocol_serialise_config_interface(pos, iface);
 538         }
 539
 540         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 541         pos += 4;
 542         for (i = 0; i < config->network.n_dns_servers; i++) {
 543                 pos += pb_protocol_serialise_string(pos,
 544                                 config->network.dns_servers[i]);
 545         }
 546
 547         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 548         pos += 4;
 549         for (i = 0; i < config->n_autoboot_opts; i++) {
 550                 *(uint32_t *)pos =
 551                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 552                 pos += 4;
 553                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 554                         *(uint32_t *)pos =
 555                                 __cpu_to_be32(config->autoboot_opts[i].type);
 556                         pos += 4;
 557                 } else {
 558                         pos += pb_protocol_serialise_string(pos,
 559                                                 config->autoboot_opts[i].uuid);
 560                 }
 561         }
 562
 563         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 564         pos += 4;
 565         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 566         pos += 4;
 567
 568         *(uint32_t *)pos = config->allow_writes;
 569         pos += 4;
 570
 571         *(uint32_t *)pos = __cpu_to_be32(config->n_tty);
 572         pos += 4;
 573         for (i = 0; i < config->n_tty; i++)
 574                 pos += pb_protocol_serialise_string(pos, config->tty_list[i]);
 575
 576         pos += pb_protocol_serialise_string(pos, config->boot_tty);
 577
 578         pos += pb_protocol_serialise_string(pos, config->lang);
 579
 580         assert(pos <= buf + buf_len);
 581         (void)buf_len;
 582
 583         return 0;
 584 }
 585
 586 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 587 {
 588         char *pos = buf;
 589
 590         pos += pb_protocol_serialise_string(pos, url);
 591
 592         assert(pos <=buf+buf_len);
 593         (void)buf_len;
 594
 595         return 0;
 596 }
 597
 598 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 599 {
 600         int total_len, rc;
 601         char *pos;
 602
 603         total_len = sizeof(*message) + message->payload_len;
 604
 605         message->payload_len = __cpu_to_be32(message->payload_len);
 606         message->action = __cpu_to_be32(message->action);
 607
 608         for (pos = (void *)message; total_len;) {
 609                 rc = write(fd, pos, total_len);
 610
 611                 if (rc <= 0)
 612                         break;
 613
 614                 total_len -= rc;
 615                 pos += rc;
 616         }
 617
 618         talloc_free(message);
 619
 620         if (!total_len)
 621                 return 0;
 622
 623         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 624         return -1;
 625 }
 626
 627 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 628                 enum pb_protocol_action action, int payload_len)
 629 {
 630         struct pb_protocol_message *message;
 631
 632         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 633                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 634                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 635                 return NULL;
 636         }
 637
 638         message = talloc_size(ctx, sizeof(*message) + payload_len);
 639
 640         /* we convert these to big-endian in write_message() */
 641         message->action = action;
 642         message->payload_len = payload_len;
 643
 644         return message;
 645
 646 }
 647
 648 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 649 {
 650         struct pb_protocol_message *message, m;
 651         int rc;
 652         unsigned int len;
 653
 654         /* use the stack for the initial 8-byte read */
 655
 656         rc = read(fd, &m, sizeof(m));
 657         if (rc != sizeof(m))
 658                 return NULL;
 659
 660         m.payload_len = __be32_to_cpu(m.payload_len);
 661         m.action = __be32_to_cpu(m.action);
 662
 663         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 664                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 665                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 666                 return NULL;
 667         }
 668
 669         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 670         memcpy(message, &m, sizeof(m));
 671
 672         for (len = 0; len < m.payload_len;) {
 673                 rc = read(fd, message->payload + len, m.payload_len - len);
 674
 675                 if (rc <= 0) {
 676                         talloc_free(message);
 677                         pb_log("%s: failed (%u): %s\n", __func__, len,
 678                                 strerror(errno));
 679                         return NULL;
 680                 }
 681
 682                 len += rc;
 683         }
 684
 685         return message;
 686 }
 687
 688
 689 int pb_protocol_deserialise_device(struct device *dev,
 690                 const struct pb_protocol_message *message)
 691 {
 692         unsigned int len;
 693         const char *pos;
 694         int rc = -1;
 695
 696         len = message->payload_len;
 697         pos = message->payload;
 698
 699         if (read_string(dev, &pos, &len, &dev->id))
 700                 goto out;
 701
 702         if (len < sizeof(enum device_type))
 703                 goto out;
 704         dev->type = *(enum device_type *)(pos);
 705         pos += sizeof(enum device_type);
 706         len -= sizeof(enum device_type);
 707
 708         if (read_string(dev, &pos, &len, &dev->name))
 709                 goto out;
 710
 711         if (read_string(dev, &pos, &len, &dev->description))
 712                 goto out;
 713
 714         if (read_string(dev, &pos, &len, &dev->icon_file))
 715                 goto out;
 716
 717         rc = 0;
 718
 719 out:
 720         return rc;
 721 }
 722
 723 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 724                 const struct pb_protocol_message *message)
 725 {
 726         unsigned int len;
 727         const char *pos;
 728         int rc = -1;
 729
 730         len = message->payload_len;
 731         pos = message->payload;
 732
 733         if (read_string(opt, &pos, &len, &opt->device_id))
 734                 goto out;
 735
 736         if (read_string(opt, &pos, &len, &opt->id))
 737                 goto out;
 738
 739         if (read_string(opt, &pos, &len, &opt->name))
 740                 goto out;
 741
 742         if (read_string(opt, &pos, &len, &opt->description))
 743                 goto out;
 744
 745         if (read_string(opt, &pos, &len, &opt->icon_file))
 746                 goto out;
 747
 748         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 749                 goto out;
 750
 751         if (read_string(opt, &pos, &len, &opt->initrd_file))
 752                 goto out;
 753
 754         if (read_string(opt, &pos, &len, &opt->dtb_file))
 755                 goto out;
 756
 757         if (read_string(opt, &pos, &len, &opt->boot_args))
 758                 goto out;
 759
 760         if (read_string(opt, &pos, &len, &opt->args_sig_file))
 761                 goto out;
 762
 763         if (len < sizeof(bool))
 764                 goto out;
 765         opt->is_default = *(bool *)(pos);
 766
 767         rc = 0;
 768
 769 out:
 770         return rc;
 771 }
 772
 773 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 774                 const struct pb_protocol_message *message)
 775 {
 776         unsigned int len;
 777         const char *pos;
 778         int rc = -1;
 779
 780         len = message->payload_len;
 781         pos = message->payload;
 782
 783         if (read_string(cmd, &pos, &len, &cmd->option_id))
 784                 goto out;
 785
 786         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 787                 goto out;
 788
 789         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 790                 goto out;
 791
 792         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 793                 goto out;
 794
 795         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 796                 goto out;
 797
 798         if (read_string(cmd, &pos, &len, &cmd->args_sig_file))
 799                 goto out;
 800
 801         if (read_string(cmd, &pos, &len, &cmd->tty))
 802                 goto out;
 803
 804         rc = 0;
 805
 806 out:
 807         return rc;
 808 }
 809
 810 int pb_protocol_deserialise_boot_status(struct boot_status *status,
 811                 const struct pb_protocol_message *message)
 812 {
 813         unsigned int len;
 814         const char *pos;
 815         int rc = -1;
 816
 817         len = message->payload_len;
 818         pos = message->payload;
 819
 820         /* first up, the type enum... */
 821         if (len < sizeof(uint32_t))
 822                 goto out;
 823
 824         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 825
 826         switch (status->type) {
 827         case BOOT_STATUS_ERROR:
 828         case BOOT_STATUS_INFO:
 829                 break;
 830         default:
 831                 goto out;
 832         }
 833
 834         pos += sizeof(uint32_t);
 835         len -= sizeof(uint32_t);
 836
 837         /* message and detail strings */
 838         if (read_string(status, &pos, &len, &status->message))
 839                 goto out;
 840
 841         if (read_string(status, &pos, &len, &status->detail))
 842                 goto out;
 843
 844         /* and finally, progress */
 845         if (len < sizeof(uint32_t))
 846                 goto out;
 847
 848         status->progress = __be32_to_cpu(*(uint32_t *)(pos));
 849
 850         /* clamp to 100% */
 851         if (status->progress > 100)
 852                 status->progress = 100;
 853
 854         rc = 0;
 855
 856 out:
 857         return rc;
 858 }
 859
 860 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 861                 const struct pb_protocol_message *message)
 862 {
 863         unsigned int len, i;
 864         const char *pos;
 865         int rc = -1;
 866         char *tmp;
 867
 868         len = message->payload_len;
 869         pos = message->payload;
 870
 871         /* type and identifier strings */
 872         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 873                 goto out;
 874
 875         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 876                 goto out;
 877
 878         /* Platform version strings for openpower platforms */
 879         if (read_u32(&pos, &len, &sysinfo->n_primary))
 880                 goto out;
 881         sysinfo->platform_primary = talloc_array(sysinfo, char *,
 882                                                 sysinfo->n_primary);
 883         for (i = 0; i < sysinfo->n_primary; i++) {
 884                 if (read_string(sysinfo, &pos, &len, &tmp))
 885                         goto out;
 886                 sysinfo->platform_primary[i] = talloc_strdup(sysinfo, tmp);
 887         }
 888
 889         if (read_u32(&pos, &len, &sysinfo->n_other))
 890                 goto out;
 891         sysinfo->platform_other = talloc_array(sysinfo, char *,
 892                                                 sysinfo->n_other);
 893         for (i = 0; i < sysinfo->n_other; i++) {
 894                 if (read_string(sysinfo, &pos, &len, &tmp))
 895                         goto out;
 896                 sysinfo->platform_other[i] = talloc_strdup(sysinfo, tmp);
 897         }
 898
 899         /* BMC version strings for openpower platforms */
 900         if (read_u32(&pos, &len, &sysinfo->n_bmc_current))
 901                 goto out;
 902         sysinfo->bmc_current = talloc_array(sysinfo, char *,
 903                                                 sysinfo->n_bmc_current);
 904         for (i = 0; i < sysinfo->n_bmc_current; i++) {
 905                 if (read_string(sysinfo, &pos, &len, &tmp))
 906                         goto out;
 907                 sysinfo->bmc_current[i] = talloc_strdup(sysinfo, tmp);
 908         }
 909
 910         if (read_u32(&pos, &len, &sysinfo->n_bmc_golden))
 911                 goto out;
 912         sysinfo->bmc_golden = talloc_array(sysinfo, char *,
 913                                                 sysinfo->n_bmc_golden);
 914         for (i = 0; i < sysinfo->n_bmc_golden; i++) {
 915                 if (read_string(sysinfo, &pos, &len, &tmp))
 916                         goto out;
 917                 sysinfo->bmc_golden[i] = talloc_strdup(sysinfo, tmp);
 918         }
 919
 920         /* number of interfaces */
 921         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 922                 goto out;
 923
 924         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 925                         sysinfo->n_interfaces);
 926
 927         for (i = 0; i < sysinfo->n_interfaces; i++) {
 928                 struct interface_info *if_info = talloc(sysinfo,
 929                                                         struct interface_info);
 930
 931                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 932                         goto out;
 933
 934                 if (len < if_info->hwaddr_size)
 935                         goto out;
 936
 937                 if_info->hwaddr = talloc_memdup(if_info, pos,
 938                                                 if_info->hwaddr_size);
 939                 pos += if_info->hwaddr_size;
 940                 len -= if_info->hwaddr_size;
 941
 942                 if (read_string(if_info, &pos, &len, &if_info->name))
 943                         goto out;
 944
 945                 if_info->link = *(bool *)pos;
 946                 pos += sizeof(if_info->link);
 947
 948                 sysinfo->interfaces[i] = if_info;
 949         }
 950
 951         /* number of interfaces */
 952         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 953                 goto out;
 954
 955         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 956                         sysinfo->n_blockdevs);
 957
 958         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 959                 struct blockdev_info *bd_info = talloc(sysinfo,
 960                                                         struct blockdev_info);
 961
 962                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 963                         goto out;
 964
 965                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 966                         goto out;
 967
 968                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 969                         goto out;
 970
 971                 sysinfo->blockdevs[i] = bd_info;
 972         }
 973
 974         for (i = 0; i < HWADDR_SIZE; i++) {
 975                 if (pos[i] != 0) {
 976                         sysinfo->bmc_mac = talloc_memdup(sysinfo, pos, HWADDR_SIZE);
 977                         break;
 978                 }
 979         }
 980
 981         pos += HWADDR_SIZE;
 982         len -= HWADDR_SIZE;
 983
 984         rc = 0;
 985 out:
 986         return rc;
 987 }
 988
 989 static int pb_protocol_deserialise_config_interface(const char **buf,
 990                 unsigned int *len, struct interface_config *iface)
 991 {
 992         unsigned int tmp;
 993
 994         if (*len < sizeof(iface->hwaddr))
 995                 return -1;
 996
 997         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 998         *buf += sizeof(iface->hwaddr);
 999         *len -= sizeof(iface->hwaddr);
1000
1001         if (read_u32(buf, len, &tmp))
1002                 return -1;
1003         iface->ignore = !!tmp;
1004
1005         if (iface->ignore)
1006                 return 0;
1007
1008         if (read_u32(buf, len, &iface->method))
1009                 return -1;
1010
1011         if (iface->method == CONFIG_METHOD_STATIC) {
1012                 if (read_string(iface, buf, len, &iface->static_config.address))
1013                         return -1;
1014
1015                 if (read_string(iface, buf, len, &iface->static_config.gateway))
1016                         return -1;
1017
1018                 if (read_string(iface, buf, len, &iface->static_config.url))
1019                         return -1;
1020         }
1021
1022         return 0;
1023 }
1024
1025 int pb_protocol_deserialise_config(struct config *config,
1026                 const struct pb_protocol_message *message)
1027 {
1028         unsigned int len, i, tmp;
1029         const char *pos;
1030         int rc = -1;
1031         char *str;
1032
1033         len = message->payload_len;
1034         pos = message->payload;
1035
1036         if (read_u32(&pos, &len, &tmp))
1037                 goto out;
1038         config->autoboot_enabled = !!tmp;
1039
1040         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
1041                 goto out;
1042
1043         if (read_u32(&pos, &len, &tmp))
1044                 goto out;
1045         config->safe_mode = !!tmp;
1046
1047         if (read_u32(&pos, &len, &config->network.n_interfaces))
1048                 goto out;
1049
1050         config->network.interfaces = talloc_array(config,
1051                         struct interface_config *, config->network.n_interfaces);
1052
1053         for (i = 0; i < config->network.n_interfaces; i++) {
1054                 struct interface_config *iface = talloc_zero(
1055                                 config->network.interfaces,
1056                                 struct interface_config);
1057                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
1058                         goto out;
1059                 config->network.interfaces[i] = iface;
1060         }
1061
1062         if (read_u32(&pos, &len, &config->network.n_dns_servers))
1063                 goto out;
1064         config->network.dns_servers = talloc_array(config, const char *,
1065                         config->network.n_dns_servers);
1066
1067         for (i = 0; i < config->network.n_dns_servers; i++) {
1068                 if (read_string(config->network.dns_servers, &pos, &len, &str))
1069                         goto out;
1070                 config->network.dns_servers[i] = str;
1071         }
1072
1073         if (read_u32(&pos, &len, &config->n_autoboot_opts))
1074                 goto out;
1075         config->autoboot_opts = talloc_array(config, struct autoboot_option,
1076                         config->n_autoboot_opts);
1077
1078         for (i = 0; i < config->n_autoboot_opts; i++) {
1079                 if (read_u32(&pos, &len, &tmp))
1080                         goto out;
1081                 config->autoboot_opts[i].boot_type = (int)tmp;
1082                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
1083                         if (read_u32(&pos, &len, &tmp))
1084                                 goto out;
1085                         config->autoboot_opts[i].type = tmp;
1086                 } else {
1087                         if (read_string(config, &pos, &len, &str))
1088                                 goto out;
1089                         config->autoboot_opts[i].uuid = str;
1090                 }
1091         }
1092
1093         if (read_u32(&pos, &len, &config->ipmi_bootdev))
1094                 goto out;
1095         if (read_u32(&pos, &len, &tmp))
1096                 goto out;
1097         config->ipmi_bootdev_persistent = !!tmp;
1098
1099         if (read_u32(&pos, &len, &tmp))
1100                 goto out;
1101         config->allow_writes = !!tmp;
1102
1103         if (read_u32(&pos, &len, &config->n_tty))
1104                 goto out;
1105
1106         config->tty_list = talloc_array(config, char *, config->n_tty);
1107         for (i = 0; i < config->n_tty; i++) {
1108                 if (read_string(config->tty_list, &pos, &len, &str))
1109                         goto out;
1110                 config->tty_list[i] = str;
1111         }
1112
1113         if (read_string(config, &pos, &len, &str))
1114                 goto out;
1115
1116         config->boot_tty = str;
1117
1118         if (read_string(config, &pos, &len, &str))
1119                 goto out;
1120
1121         config->lang = str;
1122
1123         rc = 0;
1124
1125 out:
1126         return rc;
1127 }