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->console);
 216 }
 217
 218 int pb_protocol_boot_status_len(const struct status *status)
 219 {
 220         return  4 +
 221                 4 + optional_strlen(status->message) +
 222                 4;
 223 }
 224
 225 int pb_protocol_system_info_len(const struct system_info *sysinfo)
 226 {
 227         unsigned int len, i;
 228
 229         len =   4 + optional_strlen(sysinfo->type) +
 230                 4 + optional_strlen(sysinfo->identifier) +
 231                 4 + 4;
 232
 233         len +=  4;
 234         for (i = 0; i < sysinfo->n_primary; i++)
 235                 len += 4 + optional_strlen(sysinfo->platform_primary[i]);
 236         len +=  4;
 237         for (i = 0; i < sysinfo->n_other; i++)
 238                 len += 4 + optional_strlen(sysinfo->platform_other[i]);
 239
 240         len +=  4;
 241         for (i = 0; i < sysinfo->n_bmc_current; i++)
 242                 len += 4 + optional_strlen(sysinfo->bmc_current[i]);
 243         len +=  4;
 244         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 245                 len += 4 + optional_strlen(sysinfo->bmc_golden[i]);
 246
 247         for (i = 0; i < sysinfo->n_interfaces; i++) {
 248                 struct interface_info *if_info = sysinfo->interfaces[i];
 249                 len +=  4 + if_info->hwaddr_size +
 250                         4 + optional_strlen(if_info->name) +
 251                         sizeof(if_info->link);
 252         }
 253
 254         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 255                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 256                 len +=  4 + optional_strlen(bd_info->name) +
 257                         4 + optional_strlen(bd_info->uuid) +
 258                         4 + optional_strlen(bd_info->mountpoint);
 259         }
 260
 261         /* BMC MAC */
 262         len += HWADDR_SIZE;
 263
 264         return len;
 265 }
 266
 267 static int pb_protocol_interface_config_len(struct interface_config *conf)
 268 {
 269         unsigned int len;
 270
 271         len =   sizeof(conf->hwaddr) +
 272                 4 /* conf->ignore */;
 273
 274         if (conf->ignore)
 275                 return len;
 276
 277         len += 4 /* conf->method */;
 278
 279         if (conf->method == CONFIG_METHOD_STATIC) {
 280                 len += 4 + optional_strlen(conf->static_config.address);
 281                 len += 4 + optional_strlen(conf->static_config.gateway);
 282                 len += 4 + optional_strlen(conf->static_config.url);
 283         }
 284
 285         len += 4 /* conf->override */;
 286
 287         return len;
 288 }
 289
 290 int pb_protocol_config_len(const struct config *config)
 291 {
 292         unsigned int i, len;
 293
 294         len =   4 /* config->autoboot_enabled */ +
 295                 4 /* config->autoboot_timeout_sec */ +
 296                 4 /* config->safe_mode */;
 297
 298         len += 4;
 299         for (i = 0; i < config->network.n_interfaces; i++)
 300                 len += pb_protocol_interface_config_len(
 301                                 config->network.interfaces[i]);
 302
 303         len += 4;
 304         for (i = 0; i < config->network.n_dns_servers; i++)
 305                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 306
 307         len += 4 + optional_strlen(config->http_proxy);
 308         len += 4 + optional_strlen(config->https_proxy);
 309
 310         len += 4;
 311         for (i = 0; i < config->n_autoboot_opts; i++) {
 312                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
 313                         len += 4 + 4;
 314                 else
 315                         len += 4 + 4 +
 316                                 optional_strlen(config->autoboot_opts[i].uuid);
 317         }
 318
 319         len += 4 + 4; /* ipmi_bootdev, ipmi_bootdev_persistent */
 320
 321         len += 4; /* allow_writes */
 322
 323         len += 4; /* n_consoles */
 324         for (i = 0; i < config->n_consoles; i++)
 325                 len += 4 + optional_strlen(config->consoles[i]);
 326
 327         len += 4 + optional_strlen(config->boot_console);
 328         len += 4; /* manual_console */
 329
 330         len += 4 + optional_strlen(config->lang);
 331
 332         return len;
 333 }
 334
 335 int pb_protocol_url_len(const char *url)
 336 {
 337         /* url + length field */
 338         return 4 + optional_strlen(url);
 339 }
 340
 341 int pb_protocol_serialise_device(const struct device *dev,
 342                 char *buf, int buf_len)
 343 {
 344         char *pos = buf;
 345
 346         pos += pb_protocol_serialise_string(pos, dev->id);
 347         *(enum device_type *)pos = dev->type;
 348         pos += sizeof(enum device_type);
 349         pos += pb_protocol_serialise_string(pos, dev->name);
 350         pos += pb_protocol_serialise_string(pos, dev->description);
 351         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 352
 353         assert(pos <= buf + buf_len);
 354         (void)buf_len;
 355
 356         return 0;
 357 }
 358
 359 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 360                 char *buf, int buf_len)
 361 {
 362         char *pos = buf;
 363
 364         pos += pb_protocol_serialise_string(pos, opt->device_id);
 365         pos += pb_protocol_serialise_string(pos, opt->id);
 366         pos += pb_protocol_serialise_string(pos, opt->name);
 367         pos += pb_protocol_serialise_string(pos, opt->description);
 368         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 369         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 370         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 371         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 372         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 373         pos += pb_protocol_serialise_string(pos, opt->args_sig_file);
 374
 375         *(bool *)pos = opt->is_default;
 376         pos += sizeof(bool);
 377
 378         assert(pos <= buf + buf_len);
 379         (void)buf_len;
 380
 381         return 0;
 382 }
 383
 384 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 385                 char *buf, int buf_len)
 386 {
 387         char *pos = buf;
 388
 389         pos += pb_protocol_serialise_string(pos, boot->option_id);
 390         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 391         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 392         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 393         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 394         pos += pb_protocol_serialise_string(pos, boot->args_sig_file);
 395         pos += pb_protocol_serialise_string(pos, boot->console);
 396
 397         assert(pos <= buf + buf_len);
 398         (void)buf_len;
 399
 400         return 0;
 401 }
 402
 403 int pb_protocol_serialise_boot_status(const struct status *status,
 404                 char *buf, int buf_len)
 405 {
 406         char *pos = buf;
 407
 408         *(uint32_t *)pos = __cpu_to_be32(status->type);
 409         pos += sizeof(uint32_t);
 410
 411         pos += pb_protocol_serialise_string(pos, status->message);
 412
 413         assert(pos <= buf + buf_len);
 414         (void)buf_len;
 415
 416         return 0;
 417 }
 418
 419 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 420                 char *buf, int buf_len)
 421 {
 422         char *pos = buf;
 423         unsigned int i;
 424
 425         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 426         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 427
 428         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_primary);
 429         pos += sizeof(uint32_t);
 430         for (i = 0; i < sysinfo->n_primary; i++)
 431                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_primary[i]);
 432
 433         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_other);
 434         pos += sizeof(uint32_t);
 435         for (i = 0; i < sysinfo->n_other; i++)
 436                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_other[i]);
 437
 438         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_current);
 439         pos += sizeof(uint32_t);
 440         for (i = 0; i < sysinfo->n_bmc_current; i++)
 441                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_current[i]);
 442
 443         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_golden);
 444         pos += sizeof(uint32_t);
 445         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 446                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_golden[i]);
 447
 448         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 449         pos += sizeof(uint32_t);
 450
 451         for (i = 0; i < sysinfo->n_interfaces; i++) {
 452                 struct interface_info *if_info = sysinfo->interfaces[i];
 453
 454                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 455                 pos += sizeof(uint32_t);
 456
 457                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 458                 pos += if_info->hwaddr_size;
 459
 460                 pos += pb_protocol_serialise_string(pos, if_info->name);
 461
 462                 *(bool *)pos = if_info->link;
 463                 pos += sizeof(bool);
 464         }
 465
 466         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 467         pos += sizeof(uint32_t);
 468
 469         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 470                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 471
 472                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 473                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 474                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 475         }
 476
 477         if (sysinfo->bmc_mac)
 478                 memcpy(pos, sysinfo->bmc_mac, HWADDR_SIZE);
 479         else
 480                 memset(pos, 0, HWADDR_SIZE);
 481         pos += HWADDR_SIZE;
 482
 483         assert(pos <= buf + buf_len);
 484         (void)buf_len;
 485
 486         return 0;
 487 }
 488
 489 static int pb_protocol_serialise_config_interface(char *buf,
 490                 struct interface_config *conf)
 491 {
 492         char *pos = buf;
 493
 494         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 495         pos += sizeof(conf->hwaddr);
 496
 497         *(uint32_t *)pos = conf->ignore;
 498         pos += 4;
 499
 500         if (conf->ignore)
 501                 return pos - buf;
 502
 503         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 504         pos += 4;
 505
 506         if (conf->method == CONFIG_METHOD_STATIC) {
 507                 pos += pb_protocol_serialise_string(pos,
 508                                 conf->static_config.address);
 509                 pos += pb_protocol_serialise_string(pos,
 510                                 conf->static_config.gateway);
 511                 pos += pb_protocol_serialise_string(pos,
 512                                 conf->static_config.url);
 513         }
 514
 515         *(uint32_t *)pos = conf->override;
 516         pos += 4;
 517
 518         return pos - buf;
 519 }
 520
 521 int pb_protocol_serialise_config(const struct config *config,
 522                 char *buf, int buf_len)
 523 {
 524         char *pos = buf;
 525         unsigned int i;
 526
 527         *(uint32_t *)pos = config->autoboot_enabled;
 528         pos += 4;
 529
 530         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 531         pos += 4;
 532
 533         *(uint32_t *)pos = config->safe_mode;
 534         pos += 4;
 535
 536         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 537         pos += 4;
 538         for (i = 0; i < config->network.n_interfaces; i++) {
 539                 struct interface_config *iface =
 540                         config->network.interfaces[i];
 541                 pos += pb_protocol_serialise_config_interface(pos, iface);
 542         }
 543
 544         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 545         pos += 4;
 546         for (i = 0; i < config->network.n_dns_servers; i++) {
 547                 pos += pb_protocol_serialise_string(pos,
 548                                 config->network.dns_servers[i]);
 549         }
 550
 551         pos += pb_protocol_serialise_string(pos, config->http_proxy);
 552         pos += pb_protocol_serialise_string(pos, config->https_proxy);
 553
 554         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 555         pos += 4;
 556         for (i = 0; i < config->n_autoboot_opts; i++) {
 557                 *(uint32_t *)pos =
 558                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 559                 pos += 4;
 560                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 561                         *(uint32_t *)pos =
 562                                 __cpu_to_be32(config->autoboot_opts[i].type);
 563                         pos += 4;
 564                 } else {
 565                         pos += pb_protocol_serialise_string(pos,
 566                                                 config->autoboot_opts[i].uuid);
 567                 }
 568         }
 569
 570         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 571         pos += 4;
 572         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 573         pos += 4;
 574
 575         *(uint32_t *)pos = config->allow_writes;
 576         pos += 4;
 577
 578         *(uint32_t *)pos = __cpu_to_be32(config->n_consoles);
 579         pos += 4;
 580         for (i = 0; i < config->n_consoles; i++)
 581                 pos += pb_protocol_serialise_string(pos, config->consoles[i]);
 582
 583         pos += pb_protocol_serialise_string(pos, config->boot_console);
 584         *(uint32_t *)pos = config->manual_console;
 585         pos += 4;
 586
 587         pos += pb_protocol_serialise_string(pos, config->lang);
 588
 589         assert(pos <= buf + buf_len);
 590         (void)buf_len;
 591
 592         return 0;
 593 }
 594
 595 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 596 {
 597         char *pos = buf;
 598
 599         pos += pb_protocol_serialise_string(pos, url);
 600
 601         assert(pos <=buf+buf_len);
 602         (void)buf_len;
 603
 604         return 0;
 605 }
 606
 607 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 608 {
 609         int total_len, rc;
 610         char *pos;
 611
 612         total_len = sizeof(*message) + message->payload_len;
 613
 614         message->payload_len = __cpu_to_be32(message->payload_len);
 615         message->action = __cpu_to_be32(message->action);
 616
 617         for (pos = (void *)message; total_len;) {
 618                 rc = write(fd, pos, total_len);
 619
 620                 if (rc <= 0)
 621                         break;
 622
 623                 total_len -= rc;
 624                 pos += rc;
 625         }
 626
 627         talloc_free(message);
 628
 629         if (!total_len)
 630                 return 0;
 631
 632         pb_log("%s: failed: %s\n", __func__, strerror(errno));
 633         return -1;
 634 }
 635
 636 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 637                 enum pb_protocol_action action, int payload_len)
 638 {
 639         struct pb_protocol_message *message;
 640
 641         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 642                 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
 643                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 644                 return NULL;
 645         }
 646
 647         message = talloc_size(ctx, sizeof(*message) + payload_len);
 648
 649         /* we convert these to big-endian in write_message() */
 650         message->action = action;
 651         message->payload_len = payload_len;
 652
 653         return message;
 654
 655 }
 656
 657 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 658 {
 659         struct pb_protocol_message *message, m;
 660         int rc;
 661         unsigned int len;
 662
 663         /* use the stack for the initial 8-byte read */
 664
 665         rc = read(fd, &m, sizeof(m));
 666         if (rc != sizeof(m))
 667                 return NULL;
 668
 669         m.payload_len = __be32_to_cpu(m.payload_len);
 670         m.action = __be32_to_cpu(m.action);
 671
 672         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 673                 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
 674                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 675                 return NULL;
 676         }
 677
 678         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 679         memcpy(message, &m, sizeof(m));
 680
 681         for (len = 0; len < m.payload_len;) {
 682                 rc = read(fd, message->payload + len, m.payload_len - len);
 683
 684                 if (rc <= 0) {
 685                         talloc_free(message);
 686                         pb_log("%s: failed (%u): %s\n", __func__, len,
 687                                 strerror(errno));
 688                         return NULL;
 689                 }
 690
 691                 len += rc;
 692         }
 693
 694         return message;
 695 }
 696
 697
 698 int pb_protocol_deserialise_device(struct device *dev,
 699                 const struct pb_protocol_message *message)
 700 {
 701         unsigned int len;
 702         const char *pos;
 703         int rc = -1;
 704
 705         len = message->payload_len;
 706         pos = message->payload;
 707
 708         if (read_string(dev, &pos, &len, &dev->id))
 709                 goto out;
 710
 711         if (len < sizeof(enum device_type))
 712                 goto out;
 713         dev->type = *(enum device_type *)(pos);
 714         pos += sizeof(enum device_type);
 715         len -= sizeof(enum device_type);
 716
 717         if (read_string(dev, &pos, &len, &dev->name))
 718                 goto out;
 719
 720         if (read_string(dev, &pos, &len, &dev->description))
 721                 goto out;
 722
 723         if (read_string(dev, &pos, &len, &dev->icon_file))
 724                 goto out;
 725
 726         rc = 0;
 727
 728 out:
 729         return rc;
 730 }
 731
 732 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 733                 const struct pb_protocol_message *message)
 734 {
 735         unsigned int len;
 736         const char *pos;
 737         int rc = -1;
 738
 739         len = message->payload_len;
 740         pos = message->payload;
 741
 742         if (read_string(opt, &pos, &len, &opt->device_id))
 743                 goto out;
 744
 745         if (read_string(opt, &pos, &len, &opt->id))
 746                 goto out;
 747
 748         if (read_string(opt, &pos, &len, &opt->name))
 749                 goto out;
 750
 751         if (read_string(opt, &pos, &len, &opt->description))
 752                 goto out;
 753
 754         if (read_string(opt, &pos, &len, &opt->icon_file))
 755                 goto out;
 756
 757         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 758                 goto out;
 759
 760         if (read_string(opt, &pos, &len, &opt->initrd_file))
 761                 goto out;
 762
 763         if (read_string(opt, &pos, &len, &opt->dtb_file))
 764                 goto out;
 765
 766         if (read_string(opt, &pos, &len, &opt->boot_args))
 767                 goto out;
 768
 769         if (read_string(opt, &pos, &len, &opt->args_sig_file))
 770                 goto out;
 771
 772         if (len < sizeof(bool))
 773                 goto out;
 774         opt->is_default = *(bool *)(pos);
 775
 776         rc = 0;
 777
 778 out:
 779         return rc;
 780 }
 781
 782 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 783                 const struct pb_protocol_message *message)
 784 {
 785         unsigned int len;
 786         const char *pos;
 787         int rc = -1;
 788
 789         len = message->payload_len;
 790         pos = message->payload;
 791
 792         if (read_string(cmd, &pos, &len, &cmd->option_id))
 793                 goto out;
 794
 795         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 796                 goto out;
 797
 798         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 799                 goto out;
 800
 801         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 802                 goto out;
 803
 804         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 805                 goto out;
 806
 807         if (read_string(cmd, &pos, &len, &cmd->args_sig_file))
 808                 goto out;
 809
 810         if (read_string(cmd, &pos, &len, &cmd->console))
 811                 goto out;
 812
 813         rc = 0;
 814
 815 out:
 816         return rc;
 817 }
 818
 819 int pb_protocol_deserialise_boot_status(struct status *status,
 820                 const struct pb_protocol_message *message)
 821 {
 822         unsigned int len;
 823         const char *pos;
 824         int rc = -1;
 825
 826         len = message->payload_len;
 827         pos = message->payload;
 828
 829         /* first up, the type enum... */
 830         if (len < sizeof(uint32_t))
 831                 goto out;
 832
 833         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 834
 835         switch (status->type) {
 836         case STATUS_ERROR:
 837         case STATUS_INFO:
 838                 break;
 839         default:
 840                 goto out;
 841         }
 842
 843         pos += sizeof(uint32_t);
 844         len -= sizeof(uint32_t);
 845
 846         /* message string */
 847         if (read_string(status, &pos, &len, &status->message))
 848                 goto out;
 849
 850         rc = 0;
 851
 852 out:
 853         return rc;
 854 }
 855
 856 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
 857                 const struct pb_protocol_message *message)
 858 {
 859         unsigned int len, i;
 860         const char *pos;
 861         int rc = -1;
 862         char *tmp;
 863
 864         len = message->payload_len;
 865         pos = message->payload;
 866
 867         /* type and identifier strings */
 868         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
 869                 goto out;
 870
 871         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
 872                 goto out;
 873
 874         /* Platform version strings for openpower platforms */
 875         if (read_u32(&pos, &len, &sysinfo->n_primary))
 876                 goto out;
 877         sysinfo->platform_primary = talloc_array(sysinfo, char *,
 878                                                 sysinfo->n_primary);
 879         for (i = 0; i < sysinfo->n_primary; i++) {
 880                 if (read_string(sysinfo, &pos, &len, &tmp))
 881                         goto out;
 882                 sysinfo->platform_primary[i] = talloc_strdup(sysinfo, tmp);
 883         }
 884
 885         if (read_u32(&pos, &len, &sysinfo->n_other))
 886                 goto out;
 887         sysinfo->platform_other = talloc_array(sysinfo, char *,
 888                                                 sysinfo->n_other);
 889         for (i = 0; i < sysinfo->n_other; i++) {
 890                 if (read_string(sysinfo, &pos, &len, &tmp))
 891                         goto out;
 892                 sysinfo->platform_other[i] = talloc_strdup(sysinfo, tmp);
 893         }
 894
 895         /* BMC version strings for openpower platforms */
 896         if (read_u32(&pos, &len, &sysinfo->n_bmc_current))
 897                 goto out;
 898         sysinfo->bmc_current = talloc_array(sysinfo, char *,
 899                                                 sysinfo->n_bmc_current);
 900         for (i = 0; i < sysinfo->n_bmc_current; i++) {
 901                 if (read_string(sysinfo, &pos, &len, &tmp))
 902                         goto out;
 903                 sysinfo->bmc_current[i] = talloc_strdup(sysinfo, tmp);
 904         }
 905
 906         if (read_u32(&pos, &len, &sysinfo->n_bmc_golden))
 907                 goto out;
 908         sysinfo->bmc_golden = talloc_array(sysinfo, char *,
 909                                                 sysinfo->n_bmc_golden);
 910         for (i = 0; i < sysinfo->n_bmc_golden; i++) {
 911                 if (read_string(sysinfo, &pos, &len, &tmp))
 912                         goto out;
 913                 sysinfo->bmc_golden[i] = talloc_strdup(sysinfo, tmp);
 914         }
 915
 916         /* number of interfaces */
 917         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
 918                 goto out;
 919
 920         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
 921                         sysinfo->n_interfaces);
 922
 923         for (i = 0; i < sysinfo->n_interfaces; i++) {
 924                 struct interface_info *if_info = talloc(sysinfo,
 925                                                         struct interface_info);
 926
 927                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
 928                         goto out;
 929
 930                 if (len < if_info->hwaddr_size)
 931                         goto out;
 932
 933                 if_info->hwaddr = talloc_memdup(if_info, pos,
 934                                                 if_info->hwaddr_size);
 935                 pos += if_info->hwaddr_size;
 936                 len -= if_info->hwaddr_size;
 937
 938                 if (read_string(if_info, &pos, &len, &if_info->name))
 939                         goto out;
 940
 941                 if_info->link = *(bool *)pos;
 942                 pos += sizeof(if_info->link);
 943
 944                 sysinfo->interfaces[i] = if_info;
 945         }
 946
 947         /* number of interfaces */
 948         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
 949                 goto out;
 950
 951         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
 952                         sysinfo->n_blockdevs);
 953
 954         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 955                 struct blockdev_info *bd_info = talloc(sysinfo,
 956                                                         struct blockdev_info);
 957
 958                 if (read_string(bd_info, &pos, &len, &bd_info->name))
 959                         goto out;
 960
 961                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
 962                         goto out;
 963
 964                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
 965                         goto out;
 966
 967                 sysinfo->blockdevs[i] = bd_info;
 968         }
 969
 970         for (i = 0; i < HWADDR_SIZE; i++) {
 971                 if (pos[i] != 0) {
 972                         sysinfo->bmc_mac = talloc_memdup(sysinfo, pos, HWADDR_SIZE);
 973                         break;
 974                 }
 975         }
 976
 977         pos += HWADDR_SIZE;
 978         len -= HWADDR_SIZE;
 979
 980         rc = 0;
 981 out:
 982         return rc;
 983 }
 984
 985 static int pb_protocol_deserialise_config_interface(const char **buf,
 986                 unsigned int *len, struct interface_config *iface)
 987 {
 988         unsigned int tmp;
 989
 990         if (*len < sizeof(iface->hwaddr))
 991                 return -1;
 992
 993         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
 994         *buf += sizeof(iface->hwaddr);
 995         *len -= sizeof(iface->hwaddr);
 996
 997         if (read_u32(buf, len, &tmp))
 998                 return -1;
 999         iface->ignore = !!tmp;
1000
1001         if (iface->ignore)
1002                 return 0;
1003
1004         if (read_u32(buf, len, &iface->method))
1005                 return -1;
1006
1007         if (iface->method == CONFIG_METHOD_STATIC) {
1008                 if (read_string(iface, buf, len, &iface->static_config.address))
1009                         return -1;
1010
1011                 if (read_string(iface, buf, len, &iface->static_config.gateway))
1012                         return -1;
1013
1014                 if (read_string(iface, buf, len, &iface->static_config.url))
1015                         return -1;
1016         }
1017
1018         if (read_u32(buf, len, &tmp))
1019                 return -1;
1020         iface->override = !!tmp;
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_string(config, &pos, &len, &str))
1074                 goto out;
1075         config->http_proxy = str;
1076         if (read_string(config, &pos, &len, &str))
1077                 goto out;
1078         config->https_proxy = str;
1079
1080         if (read_u32(&pos, &len, &config->n_autoboot_opts))
1081                 goto out;
1082         config->autoboot_opts = talloc_array(config, struct autoboot_option,
1083                         config->n_autoboot_opts);
1084
1085         for (i = 0; i < config->n_autoboot_opts; i++) {
1086                 if (read_u32(&pos, &len, &tmp))
1087                         goto out;
1088                 config->autoboot_opts[i].boot_type = (int)tmp;
1089                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
1090                         if (read_u32(&pos, &len, &tmp))
1091                                 goto out;
1092                         config->autoboot_opts[i].type = tmp;
1093                 } else {
1094                         if (read_string(config, &pos, &len, &str))
1095                                 goto out;
1096                         config->autoboot_opts[i].uuid = str;
1097                 }
1098         }
1099
1100         if (read_u32(&pos, &len, &config->ipmi_bootdev))
1101                 goto out;
1102         if (read_u32(&pos, &len, &tmp))
1103                 goto out;
1104         config->ipmi_bootdev_persistent = !!tmp;
1105
1106         if (read_u32(&pos, &len, &tmp))
1107                 goto out;
1108         config->allow_writes = !!tmp;
1109
1110         if (read_u32(&pos, &len, &config->n_consoles))
1111                 goto out;
1112
1113         config->consoles = talloc_array(config, char *, config->n_consoles);
1114         for (i = 0; i < config->n_consoles; i++) {
1115                 if (read_string(config->consoles, &pos, &len, &str))
1116                         goto out;
1117                 config->consoles[i] = str;
1118         }
1119
1120         if (read_string(config, &pos, &len, &str))
1121                 goto out;
1122
1123         config->boot_console = str;
1124
1125         if (read_u32(&pos, &len, &tmp))
1126                 goto out;
1127         config->manual_console = !!tmp;
1128
1129         if (read_string(config, &pos, &len, &str))
1130                 goto out;
1131
1132         config->lang = str;
1133
1134         rc = 0;
1135
1136 out:
1137         return rc;
1138 }