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         len +=  4;
 229         for (i = 0; i < sysinfo->n_current; i++)
 230                 len += 4 + optional_strlen(sysinfo->platform_current[i]);
 231         len +=  4;
 232         for (i = 0; i < sysinfo->n_other; i++)
 233                 len += 4 + optional_strlen(sysinfo->platform_other[i]);
 234
 235         len +=  4;
 236         for (i = 0; i < sysinfo->n_bmc_current; i++)
 237                 len += 4 + optional_strlen(sysinfo->bmc_current[i]);
 238         len +=  4;
 239         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 240                 len += 4 + optional_strlen(sysinfo->bmc_golden[i]);
 241
 242         for (i = 0; i < sysinfo->n_interfaces; i++) {
 243                 struct interface_info *if_info = sysinfo->interfaces[i];
 244                 len +=  4 + if_info->hwaddr_size +
 245                         4 + optional_strlen(if_info->name) +
 246                         sizeof(if_info->link);
 247         }
 248
 249         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 250                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 251                 len +=  4 + optional_strlen(bd_info->name) +
 252                         4 + optional_strlen(bd_info->uuid) +
 253                         4 + optional_strlen(bd_info->mountpoint);
 254         }
 255
 256         /* BMC MAC */
 257         len += HWADDR_SIZE;
 258
 259         return len;
 260 }
 261
 262 static int pb_protocol_interface_config_len(struct interface_config *conf)
 263 {
 264         unsigned int len;
 265
 266         len =   sizeof(conf->hwaddr) +
 267                 4 /* conf->ignore */;
 268
 269         if (conf->ignore)
 270                 return len;
 271
 272         len += 4 /* conf->method */;
 273
 274         if (conf->method == CONFIG_METHOD_STATIC) {
 275                 len += 4 + optional_strlen(conf->static_config.address);
 276                 len += 4 + optional_strlen(conf->static_config.gateway);
 277                 len += 4 + optional_strlen(conf->static_config.url);
 278         }
 279
 280         return len;
 281 }
 282
 283 int pb_protocol_config_len(const struct config *config)
 284 {
 285         unsigned int i, len;
 286
 287         len =   4 /* config->autoboot_enabled */ +
 288                 4 /* config->autoboot_timeout_sec */ +
 289                 4 /* config->safe_mode */;
 290
 291         len += 4;
 292         for (i = 0; i < config->network.n_interfaces; i++)
 293                 len += pb_protocol_interface_config_len(
 294                                 config->network.interfaces[i]);
 295
 296         len += 4;
 297         for (i = 0; i < config->network.n_dns_servers; i++)
 298                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 299
 300         len += 4;
 301         for (i = 0; i < config->n_autoboot_opts; i++) {
 302                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
 303                         len += 4 + 4;
 304                 else
 305                         len += 4 + 4 +
 306                                 optional_strlen(config->autoboot_opts[i].uuid);
 307         }
 308
 309         len += 4 + 4; /* ipmi_bootdev, ipmi_bootdev_persistent */
 310
 311         len += 4; /* allow_writes */
 312
 313         len += 4 + optional_strlen(config->lang);
 314
 315         return len;
 316 }
 317
 318 int pb_protocol_url_len(const char *url)
 319 {
 320         /* url + length field */
 321         return 4 + optional_strlen(url);
 322 }
 323
 324 int pb_protocol_serialise_device(const struct device *dev,
 325                 char *buf, int buf_len)
 326 {
 327         char *pos = buf;
 328
 329         pos += pb_protocol_serialise_string(pos, dev->id);
 330         *(enum device_type *)pos = dev->type;
 331         pos += sizeof(enum device_type);
 332         pos += pb_protocol_serialise_string(pos, dev->name);
 333         pos += pb_protocol_serialise_string(pos, dev->description);
 334         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 335
 336         assert(pos <= buf + buf_len);
 337         (void)buf_len;
 338
 339         return 0;
 340 }
 341
 342 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 343                 char *buf, int buf_len)
 344 {
 345         char *pos = buf;
 346
 347         pos += pb_protocol_serialise_string(pos, opt->device_id);
 348         pos += pb_protocol_serialise_string(pos, opt->id);
 349         pos += pb_protocol_serialise_string(pos, opt->name);
 350         pos += pb_protocol_serialise_string(pos, opt->description);
 351         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 352         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 353         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 354         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 355         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 356
 357         *(bool *)pos = opt->is_default;
 358         pos += sizeof(bool);
 359
 360         assert(pos <= buf + buf_len);
 361         (void)buf_len;
 362
 363         return 0;
 364 }
 365
 366 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 367                 char *buf, int buf_len)
 368 {
 369         char *pos = buf;
 370
 371         pos += pb_protocol_serialise_string(pos, boot->option_id);
 372         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 373         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 374         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 375         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 376
 377         assert(pos <= buf + buf_len);
 378         (void)buf_len;
 379
 380         return 0;
 381 }
 382
 383 int pb_protocol_serialise_boot_status(const struct boot_status *status,
 384                 char *buf, int buf_len)
 385 {
 386         char *pos = buf;
 387
 388         *(uint32_t *)pos = __cpu_to_be32(status->type);
 389         pos += sizeof(uint32_t);
 390
 391         pos += pb_protocol_serialise_string(pos, status->message);
 392         pos += pb_protocol_serialise_string(pos, status->detail);
 393
 394         *(uint32_t *)pos = __cpu_to_be32(status->type);
 395         pos += sizeof(uint32_t);
 396
 397         assert(pos <= buf + buf_len);
 398         (void)buf_len;
 399
 400         return 0;
 401 }
 402
 403 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 404                 char *buf, int buf_len)
 405 {
 406         char *pos = buf;
 407         unsigned int i;
 408
 409         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 410         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 411
 412         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_current);
 413         pos += sizeof(uint32_t);
 414         for (i = 0; i < sysinfo->n_current; i++)
 415                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_current[i]);
 416
 417         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_other);
 418         pos += sizeof(uint32_t);
 419         for (i = 0; i < sysinfo->n_other; i++)
 420                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_other[i]);
 421
 422         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_current);
 423         pos += sizeof(uint32_t);
 424         for (i = 0; i < sysinfo->n_bmc_current; i++)
 425                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_current[i]);
 426
 427         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_golden);
 428         pos += sizeof(uint32_t);
 429         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 430                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_golden[i]);
 431
 432         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 433         pos += sizeof(uint32_t);
 434
 435         for (i = 0; i < sysinfo->n_interfaces; i++) {
 436                 struct interface_info *if_info = sysinfo->interfaces[i];
 437
 438                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 439                 pos += sizeof(uint32_t);
 440
 441                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 442                 pos += if_info->hwaddr_size;
 443
 444                 pos += pb_protocol_serialise_string(pos, if_info->name);
 445
 446                 *(bool *)pos = if_info->link;
 447                 pos += sizeof(bool);
 448         }
 449
 450         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 451         pos += sizeof(uint32_t);
 452
 453         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 454                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 455
 456                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 457                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 458                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 459         }
 460
 461         if (sysinfo->bmc_mac)
 462                 memcpy(pos, sysinfo->bmc_mac, HWADDR_SIZE);
 463         else
 464                 memset(pos, 0, HWADDR_SIZE);
 465         pos += HWADDR_SIZE;
 466
 467         assert(pos <= buf + buf_len);
 468         (void)buf_len;
 469
 470         return 0;
 471 }
 472
 473 static int pb_protocol_serialise_config_interface(char *buf,
 474                 struct interface_config *conf)
 475 {
 476         char *pos = buf;
 477
 478         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 479         pos += sizeof(conf->hwaddr);
 480
 481         *(uint32_t *)pos = conf->ignore;
 482         pos += 4;
 483
 484         if (conf->ignore)
 485                 return pos - buf;
 486
 487         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 488         pos += 4;
 489
 490         if (conf->method == CONFIG_METHOD_STATIC) {
 491                 pos += pb_protocol_serialise_string(pos,
 492                                 conf->static_config.address);
 493                 pos += pb_protocol_serialise_string(pos,
 494                                 conf->static_config.gateway);
 495                 pos += pb_protocol_serialise_string(pos,
 496                                 conf->static_config.url);
 497         }
 498
 499         return pos - buf;
 500 }
 501
 502 int pb_protocol_serialise_config(const struct config *config,
 503                 char *buf, int buf_len)
 504 {
 505         char *pos = buf;
 506         unsigned int i;
 507
 508         *(uint32_t *)pos = config->autoboot_enabled;
 509         pos += 4;
 510
 511         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 512         pos += 4;
 513
 514         *(uint32_t *)pos = config->safe_mode;
 515         pos += 4;
 516
 517         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 518         pos += 4;
 519         for (i = 0; i < config->network.n_interfaces; i++) {
 520                 struct interface_config *iface =
 521                         config->network.interfaces[i];
 522                 pos += pb_protocol_serialise_config_interface(pos, iface);
 523         }
 524
 525         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 526         pos += 4;
 527         for (i = 0; i < config->network.n_dns_servers; i++) {
 528                 pos += pb_protocol_serialise_string(pos,
 529                                 config->network.dns_servers[i]);
 530         }
 531
 532         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 533         pos += 4;
 534         for (i = 0; i < config->n_autoboot_opts; i++) {
 535                 *(uint32_t *)pos =
 536                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 537                 pos += 4;
 538                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 539                         *(uint32_t *)pos =
 540                                 __cpu_to_be32(config->autoboot_opts[i].type);
 541                         pos += 4;
 542                 } else {
 543                         pos += pb_protocol_serialise_string(pos,
 544                                                 config->autoboot_opts[i].uuid);
 545                 }
 546         }
 547
 548         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 549         pos += 4;
 550         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 551         pos += 4;
 552
 553         *(uint32_t *)pos = config->allow_writes;
 554         pos += 4;
 555
 556         pos += pb_protocol_serialise_string(pos, config->lang);
 557
 558         assert(pos <= buf + buf_len);
 559         (void)buf_len;
 560
 561         return 0;
 562 }
 563
 564 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 565 {
 566         char *pos = buf;
 567
 568         pos += pb_protocol_serialise_string(pos, url);
 569
 570         assert(pos <=buf+buf_len);
 571         (void)buf_len;
 572
 573         return 0;
 574 }
 575
 576 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 577 {
 578         int total_len, rc;
 579         char *pos;
 580
 581         total_len = sizeof(*message) + message->payload_len;
 582
 583         message->payload_len = __cpu_to_be32(message->payload_len);
 584         message->action = __cpu_to_be32(message->action);
 585
 586         for (pos = (void *)message; total_len;) {
 587                 rc = write(fd, pos, total_len);
 588
 589                 if (rc <= 0)
 590                         break;
 591
 592                 total_len -= rc;
 593                 pos += rc;
 594         }
 595
 596         talloc_free(message);
 597
 598         if (!total_len)
 599                 return 0;
 600
 601         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 602         return -1;
 603 }
 604
 605 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 606                 enum pb_protocol_action action, int payload_len)
 607 {
 608         struct pb_protocol_message *message;
 609
 610         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 611                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 612                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 613                 return NULL;
 614         }
 615
 616         message = talloc_size(ctx, sizeof(*message) + payload_len);
 617
 618         /* we convert these to big-endian in write_message() */
 619         message->action = action;
 620         message->payload_len = payload_len;
 621
 622         return message;
 623
 624 }
 625
 626 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 627 {
 628         struct pb_protocol_message *message, m;
 629         int rc;
 630         unsigned int len;
 631
 632         /* use the stack for the initial 8-byte read */
 633
 634         rc = read(fd, &m, sizeof(m));
 635         if (rc != sizeof(m))
 636                 return NULL;
 637
 638         m.payload_len = __be32_to_cpu(m.payload_len);
 639         m.action = __be32_to_cpu(m.action);
 640
 641         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 642                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 643                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 644                 return NULL;
 645         }
 646
 647         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 648         memcpy(message, &m, sizeof(m));
 649
 650         for (len = 0; len < m.payload_len;) {
 651                 rc = read(fd, message->payload + len, m.payload_len - len);
 652
 653                 if (rc <= 0) {
 654                         talloc_free(message);
 655                         pb_log("%s: failed (%u): %s\n", __func__, len,
 656                                 strerror(errno));
 657                         return NULL;
 658                 }
 659
 660                 len += rc;
 661         }
 662
 663         return message;
 664 }
 665
 666
 667 int pb_protocol_deserialise_device(struct device *dev,
 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(dev, &pos, &len, &dev->id))
 678                 goto out;
 679
 680         if (len < sizeof(enum device_type))
 681                 goto out;
 682         dev->type = *(enum device_type *)(pos);
 683         pos += sizeof(enum device_type);
 684         len -= sizeof(enum device_type);
 685
 686         if (read_string(dev, &pos, &len, &dev->name))
 687                 goto out;
 688
 689         if (read_string(dev, &pos, &len, &dev->description))
 690                 goto out;
 691
 692         if (read_string(dev, &pos, &len, &dev->icon_file))
 693                 goto out;
 694
 695         rc = 0;
 696
 697 out:
 698         return rc;
 699 }
 700
 701 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 702                 const struct pb_protocol_message *message)
 703 {
 704         unsigned int len;
 705         const char *pos;
 706         int rc = -1;
 707
 708         len = message->payload_len;
 709         pos = message->payload;
 710
 711         if (read_string(opt, &pos, &len, &opt->device_id))
 712                 goto out;
 713
 714         if (read_string(opt, &pos, &len, &opt->id))
 715                 goto out;
 716
 717         if (read_string(opt, &pos, &len, &opt->name))
 718                 goto out;
 719
 720         if (read_string(opt, &pos, &len, &opt->description))
 721                 goto out;
 722
 723         if (read_string(opt, &pos, &len, &opt->icon_file))
 724                 goto out;
 725
 726         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 727                 goto out;
 728
 729         if (read_string(opt, &pos, &len, &opt->initrd_file))
 730                 goto out;
 731
 732         if (read_string(opt, &pos, &len, &opt->dtb_file))
 733                 goto out;
 734
 735         if (read_string(opt, &pos, &len, &opt->boot_args))
 736                 goto out;
 737
 738         if (len < sizeof(bool))
 739                 goto out;
 740         opt->is_default = *(bool *)(pos);
 741
 742         rc = 0;
 743
 744 out:
 745         return rc;
 746 }
 747
 748 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 749                 const struct pb_protocol_message *message)
 750 {
 751         unsigned int len;
 752         const char *pos;
 753         int rc = -1;
 754
 755         len = message->payload_len;
 756         pos = message->payload;
 757
 758         if (read_string(cmd, &pos, &len, &cmd->option_id))
 759                 goto out;
 760
 761         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 762                 goto out;
 763
 764         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 765                 goto out;
 766
 767         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 768                 goto out;
 769
 770         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 771                 goto out;
 772
 773         rc = 0;
 774
 775 out:
 776         return rc;
 777 }
 778
 779 int pb_protocol_deserialise_boot_status(struct boot_status *status,
 780                 const struct pb_protocol_message *message)
 781 {
 782         unsigned int len;
 783         const char *pos;
 784         int rc = -1;
 785
 786         len = message->payload_len;
 787         pos = message->payload;
 788
 789         /* first up, the type enum... */
 790         if (len < sizeof(uint32_t))
 791                 goto out;
 792
 793         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 794
 795         switch (status->type) {
 796         case BOOT_STATUS_ERROR:
 797         case BOOT_STATUS_INFO:
 798                 break;
 799         default:
 800                 goto out;
 801         }
 802
 803         pos += sizeof(uint32_t);
 804         len -= sizeof(uint32_t);
 805
 806         /* message and detail strings */
 807         if (read_string(status, &pos, &len, &status->message))
 808                 goto out;
 809
 810         if (read_string(status, &pos, &len, &status->detail))
 811                 goto out;
 812
 813         /* and finally, progress */
 814         if (len < sizeof(uint32_t))
 815                 goto out;
 816
 817         status->progress = __be32_to_cpu(*(uint32_t *)(pos));
 818
 819         /* clamp to 100% */
 820         if (status->progress > 100)
 821                 status->progress = 100;
 822
 823         rc = 0;
 824
 825 out:
 826         return rc;
 827 }
 828
 829 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 830                 const struct pb_protocol_message *message)
 831 {
 832         unsigned int len, i;
 833         const char *pos;
 834         int rc = -1;
 835         char *tmp;
 836
 837         len = message->payload_len;
 838         pos = message->payload;
 839
 840         /* type and identifier strings */
 841         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 842                 goto out;
 843
 844         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 845                 goto out;
 846
 847         /* Platform version strings for openpower platforms */
 848         if (read_u32(&pos, &len, &sysinfo->n_current))
 849                 goto out;
 850         sysinfo->platform_current = talloc_array(sysinfo, char *,
 851                                                 sysinfo->n_current);
 852         for (i = 0; i < sysinfo->n_current; i++) {
 853                 if (read_string(sysinfo, &pos, &len, &tmp))
 854                         goto out;
 855                 sysinfo->platform_current[i] = talloc_strdup(sysinfo, tmp);
 856         }
 857
 858         if (read_u32(&pos, &len, &sysinfo->n_other))
 859                 goto out;
 860         sysinfo->platform_other = talloc_array(sysinfo, char *,
 861                                                 sysinfo->n_other);
 862         for (i = 0; i < sysinfo->n_other; i++) {
 863                 if (read_string(sysinfo, &pos, &len, &tmp))
 864                         goto out;
 865                 sysinfo->platform_other[i] = talloc_strdup(sysinfo, tmp);
 866         }
 867
 868         /* BMC version strings for openpower platforms */
 869         if (read_u32(&pos, &len, &sysinfo->n_bmc_current))
 870                 goto out;
 871         sysinfo->bmc_current = talloc_array(sysinfo, char *,
 872                                                 sysinfo->n_bmc_current);
 873         for (i = 0; i < sysinfo->n_bmc_current; i++) {
 874                 if (read_string(sysinfo, &pos, &len, &tmp))
 875                         goto out;
 876                 sysinfo->bmc_current[i] = talloc_strdup(sysinfo, tmp);
 877         }
 878
 879         if (read_u32(&pos, &len, &sysinfo->n_bmc_golden))
 880                 goto out;
 881         sysinfo->bmc_golden = talloc_array(sysinfo, char *,
 882                                                 sysinfo->n_bmc_golden);
 883         for (i = 0; i < sysinfo->n_bmc_golden; i++) {
 884                 if (read_string(sysinfo, &pos, &len, &tmp))
 885                         goto out;
 886                 sysinfo->bmc_golden[i] = talloc_strdup(sysinfo, tmp);
 887         }
 888
 889         /* number of interfaces */
 890         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 891                 goto out;
 892
 893         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 894                         sysinfo->n_interfaces);
 895
 896         for (i = 0; i < sysinfo->n_interfaces; i++) {
 897                 struct interface_info *if_info = talloc(sysinfo,
 898                                                         struct interface_info);
 899
 900                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 901                         goto out;
 902
 903                 if (len < if_info->hwaddr_size)
 904                         goto out;
 905
 906                 if_info->hwaddr = talloc_memdup(if_info, pos,
 907                                                 if_info->hwaddr_size);
 908                 pos += if_info->hwaddr_size;
 909                 len -= if_info->hwaddr_size;
 910
 911                 if (read_string(if_info, &pos, &len, &if_info->name))
 912                         goto out;
 913
 914                 if_info->link = *(bool *)pos;
 915                 pos += sizeof(if_info->link);
 916
 917                 sysinfo->interfaces[i] = if_info;
 918         }
 919
 920         /* number of interfaces */
 921         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 922                 goto out;
 923
 924         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 925                         sysinfo->n_blockdevs);
 926
 927         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 928                 struct blockdev_info *bd_info = talloc(sysinfo,
 929                                                         struct blockdev_info);
 930
 931                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 932                         goto out;
 933
 934                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 935                         goto out;
 936
 937                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 938                         goto out;
 939
 940                 sysinfo->blockdevs[i] = bd_info;
 941         }
 942
 943         for (i = 0; i < HWADDR_SIZE; i++) {
 944                 if (pos[i] != 0) {
 945                         sysinfo->bmc_mac = talloc_memdup(sysinfo, pos, HWADDR_SIZE);
 946                         break;
 947                 }
 948         }
 949
 950         pos += HWADDR_SIZE;
 951         len -= HWADDR_SIZE;
 952
 953         rc = 0;
 954 out:
 955         return rc;
 956 }
 957
 958 static int pb_protocol_deserialise_config_interface(const char **buf,
 959                 unsigned int *len, struct interface_config *iface)
 960 {
 961         unsigned int tmp;
 962
 963         if (*len < sizeof(iface->hwaddr))
 964                 return -1;
 965
 966         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 967         *buf += sizeof(iface->hwaddr);
 968         *len -= sizeof(iface->hwaddr);
 969
 970         if (read_u32(buf, len, &tmp))
 971                 return -1;
 972         iface->ignore = !!tmp;
 973
 974         if (iface->ignore)
 975                 return 0;
 976
 977         if (read_u32(buf, len, &iface->method))
 978                 return -1;
 979
 980         if (iface->method == CONFIG_METHOD_STATIC) {
 981                 if (read_string(iface, buf, len, &iface->static_config.address))
 982                         return -1;
 983
 984                 if (read_string(iface, buf, len, &iface->static_config.gateway))
 985                         return -1;
 986
 987                 if (read_string(iface, buf, len, &iface->static_config.url))
 988                         return -1;
 989         }
 990
 991         return 0;
 992 }
 993
 994 int pb_protocol_deserialise_config(struct config *config,
 995                 const struct pb_protocol_message *message)
 996 {
 997         unsigned int len, i, tmp;
 998         const char *pos;
 999         int rc = -1;
1000         char *str;
1001
1002         len = message->payload_len;
1003         pos = message->payload;
1004
1005         if (read_u32(&pos, &len, &tmp))
1006                 goto out;
1007         config->autoboot_enabled = !!tmp;
1008
1009         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
1010                 goto out;
1011
1012         if (read_u32(&pos, &len, &tmp))
1013                 goto out;
1014         config->safe_mode = !!tmp;
1015
1016         if (read_u32(&pos, &len, &config->network.n_interfaces))
1017                 goto out;
1018
1019         config->network.interfaces = talloc_array(config,
1020                         struct interface_config *, config->network.n_interfaces);
1021
1022         for (i = 0; i < config->network.n_interfaces; i++) {
1023                 struct interface_config *iface = talloc_zero(
1024                                 config->network.interfaces,
1025                                 struct interface_config);
1026                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
1027                         goto out;
1028                 config->network.interfaces[i] = iface;
1029         }
1030
1031         if (read_u32(&pos, &len, &config->network.n_dns_servers))
1032                 goto out;
1033         config->network.dns_servers = talloc_array(config, const char *,
1034                         config->network.n_dns_servers);
1035
1036         for (i = 0; i < config->network.n_dns_servers; i++) {
1037                 if (read_string(config->network.dns_servers, &pos, &len, &str))
1038                         goto out;
1039                 config->network.dns_servers[i] = str;
1040         }
1041
1042         if (read_u32(&pos, &len, &config->n_autoboot_opts))
1043                 goto out;
1044         config->autoboot_opts = talloc_array(config, struct autoboot_option,
1045                         config->n_autoboot_opts);
1046
1047         for (i = 0; i < config->n_autoboot_opts; i++) {
1048                 if (read_u32(&pos, &len, &tmp))
1049                         goto out;
1050                 config->autoboot_opts[i].boot_type = (int)tmp;
1051                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
1052                         if (read_u32(&pos, &len, &tmp))
1053                                 goto out;
1054                         config->autoboot_opts[i].type = tmp;
1055                 } else {
1056                         if (read_string(config, &pos, &len, &str))
1057                                 goto out;
1058                         config->autoboot_opts[i].uuid = str;
1059                 }
1060         }
1061
1062         if (read_u32(&pos, &len, &config->ipmi_bootdev))
1063                 goto out;
1064         if (read_u32(&pos, &len, &tmp))
1065                 goto out;
1066         config->ipmi_bootdev_persistent = !!tmp;
1067
1068         if (read_u32(&pos, &len, &tmp))
1069                 goto out;
1070         config->allow_writes = !!tmp;
1071
1072         if (read_string(config, &pos, &len, &str))
1073                 goto out;
1074
1075         config->lang = str;
1076
1077         rc = 0;
1078
1079 out:
1080         return rc;
1081 }