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                 fprintf(stream, "%s\t\ttype: %s\n", text,
  79                         opt->type == DISCOVER_BOOT_OPTION ? "boot" : "plugin");
  80         }
  81 }
  82
  83 int pb_protocol_device_cmp(const struct device *a, const struct device *b)
  84 {
  85         return !strcmp(a->id, b->id);
  86 }
  87
  88 int pb_protocol_boot_option_cmp(const struct boot_option *a,
  89         const struct boot_option *b)
  90 {
  91         return !strcmp(a->id, b->id);
  92 }
  93
  94 /* Write a string into the buffer, starting at pos.
  95  *
  96  * Returns the total length used for the write, including length header.
  97  */
  98 int pb_protocol_serialise_string(char *pos, const char *str)
  99 {
 100         int len = 0;
 101
 102         if (str)
 103                 len = strlen(str);
 104
 105         *(uint32_t *)pos = __cpu_to_be32(len);
 106         pos += sizeof(uint32_t);
 107
 108         memcpy(pos, str, len);
 109
 110         return len + sizeof(uint32_t);
 111 }
 112
 113 /* Read a string from a buffer, allocating the new string as necessary.
 114  *
 115  * @param[in] ctx       The talloc context to base the allocation on
 116  * @param[in,out] pos   Where to start reading
 117  * @param[in,out] len   The amount of data remaining in the buffer
 118  * @param[out] str      Pointer to resuling string
 119  * @return              zero on success, non-zero on failure
 120  */
 121 static int read_string(void *ctx, const char **pos, unsigned int *len,
 122         char **str)
 123 {
 124         uint32_t str_len, read_len;
 125
 126         if (*len < sizeof(uint32_t))
 127                 return -1;
 128
 129         str_len = __be32_to_cpu(*(uint32_t *)(*pos));
 130         read_len = sizeof(uint32_t);
 131
 132         if (read_len + str_len > *len)
 133                 return -1;
 134
 135         if (str_len == 0)
 136                 *str = NULL;
 137         else
 138                 *str = talloc_strndup(ctx, *pos + read_len, str_len);
 139
 140         read_len += str_len;
 141
 142         /* all ok, update the caller's pointers */
 143         *pos += read_len;
 144         *len -= read_len;
 145
 146         return 0;
 147 }
 148
 149 static int read_u32(const char **pos, unsigned int *len, unsigned int *p)
 150 {
 151         if (*len < sizeof(uint32_t))
 152                 return -1;
 153
 154         *p = (unsigned int)__be32_to_cpu(*(uint32_t *)(*pos));
 155         *pos += sizeof(uint32_t);
 156         *len -= sizeof(uint32_t);
 157
 158         return 0;
 159 }
 160
 161 char *pb_protocol_deserialise_string(void *ctx,
 162                 const struct pb_protocol_message *message)
 163 {
 164         const char *buf;
 165         char *str;
 166         unsigned int len;
 167
 168         len = message->payload_len;
 169         buf = message->payload;
 170
 171         if (read_string(ctx, &buf, &len, &str))
 172                 return NULL;
 173
 174         return str;
 175 }
 176
 177 static int optional_strlen(const char *str)
 178 {
 179         if (!str)
 180                 return 0;
 181         return strlen(str);
 182 }
 183
 184 int pb_protocol_device_len(const struct device *dev)
 185 {
 186         return  4 + optional_strlen(dev->id) +
 187                 sizeof(dev->type) +
 188                 4 + optional_strlen(dev->name) +
 189                 4 + optional_strlen(dev->description) +
 190                 4 + optional_strlen(dev->icon_file);
 191 }
 192
 193 int pb_protocol_boot_option_len(const struct boot_option *opt)
 194 {
 195
 196         return  4 + optional_strlen(opt->device_id) +
 197                 4 + optional_strlen(opt->id) +
 198                 4 + optional_strlen(opt->name) +
 199                 4 + optional_strlen(opt->description) +
 200                 4 + optional_strlen(opt->icon_file) +
 201                 4 + optional_strlen(opt->boot_image_file) +
 202                 4 + optional_strlen(opt->initrd_file) +
 203                 4 + optional_strlen(opt->dtb_file) +
 204                 4 + optional_strlen(opt->boot_args) +
 205                 4 + optional_strlen(opt->args_sig_file) +
 206                 sizeof(opt->is_default) +
 207                 sizeof(opt->type);
 208 }
 209
 210 int pb_protocol_boot_len(const struct boot_command *boot)
 211 {
 212         return  4 + optional_strlen(boot->option_id) +
 213                 4 + optional_strlen(boot->boot_image_file) +
 214                 4 + optional_strlen(boot->initrd_file) +
 215                 4 + optional_strlen(boot->dtb_file) +
 216                 4 + optional_strlen(boot->boot_args) +
 217                 4 + optional_strlen(boot->args_sig_file) +
 218                 4 + optional_strlen(boot->console);
 219 }
 220
 221 int pb_protocol_boot_status_len(const struct status *status)
 222 {
 223         return  4 +     /* type */
 224                 4 + optional_strlen(status->message) +
 225                 4 +     /* backlog */
 226                 4;      /* boot_active */
 227 }
 228
 229 int pb_protocol_system_info_len(const struct system_info *sysinfo)
 230 {
 231         unsigned int len, i;
 232
 233         len =   4 + optional_strlen(sysinfo->type) +
 234                 4 + optional_strlen(sysinfo->identifier) +
 235                 4 + 4;
 236
 237         len +=  4;
 238         for (i = 0; i < sysinfo->n_primary; i++)
 239                 len += 4 + optional_strlen(sysinfo->platform_primary[i]);
 240         len +=  4;
 241         for (i = 0; i < sysinfo->n_other; i++)
 242                 len += 4 + optional_strlen(sysinfo->platform_other[i]);
 243
 244         len +=  4;
 245         for (i = 0; i < sysinfo->n_bmc_current; i++)
 246                 len += 4 + optional_strlen(sysinfo->bmc_current[i]);
 247         len +=  4;
 248         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 249                 len += 4 + optional_strlen(sysinfo->bmc_golden[i]);
 250
 251         for (i = 0; i < sysinfo->n_interfaces; i++) {
 252                 struct interface_info *if_info = sysinfo->interfaces[i];
 253                 len +=  4 + if_info->hwaddr_size +
 254                         4 + optional_strlen(if_info->name) +
 255                         sizeof(if_info->link) +
 256                         4 + optional_strlen(if_info->address) +
 257                         4 + optional_strlen(if_info->address_v6);
 258         }
 259
 260         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 261                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 262                 len +=  4 + optional_strlen(bd_info->name) +
 263                         4 + optional_strlen(bd_info->uuid) +
 264                         4 + optional_strlen(bd_info->mountpoint);
 265         }
 266
 267         /* BMC MAC */
 268         len += HWADDR_SIZE;
 269
 270         return len;
 271 }
 272
 273 static int pb_protocol_interface_config_len(struct interface_config *conf)
 274 {
 275         unsigned int len;
 276
 277         len =   sizeof(conf->hwaddr) +
 278                 4 /* conf->ignore */;
 279
 280         if (conf->ignore)
 281                 return len;
 282
 283         len += 4 /* conf->method */;
 284
 285         if (conf->method == CONFIG_METHOD_STATIC) {
 286                 len += 4 + optional_strlen(conf->static_config.address);
 287                 len += 4 + optional_strlen(conf->static_config.gateway);
 288                 len += 4 + optional_strlen(conf->static_config.url);
 289         }
 290
 291         len += 4 /* conf->override */;
 292
 293         return len;
 294 }
 295
 296 int pb_protocol_config_len(const struct config *config)
 297 {
 298         unsigned int i, len;
 299
 300         len =   4 /* config->autoboot_enabled */ +
 301                 4 /* config->autoboot_timeout_sec */ +
 302                 4 /* config->safe_mode */;
 303
 304         len += 4;
 305         for (i = 0; i < config->network.n_interfaces; i++)
 306                 len += pb_protocol_interface_config_len(
 307                                 config->network.interfaces[i]);
 308
 309         len += 4;
 310         for (i = 0; i < config->network.n_dns_servers; i++)
 311                 len += 4 + optional_strlen(config->network.dns_servers[i]);
 312
 313         len += 4 + optional_strlen(config->http_proxy);
 314         len += 4 + optional_strlen(config->https_proxy);
 315
 316         len += 4;
 317         for (i = 0; i < config->n_autoboot_opts; i++) {
 318                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
 319                         len += 4 + 4;
 320                 else
 321                         len += 4 + 4 +
 322                                 optional_strlen(config->autoboot_opts[i].uuid);
 323         }
 324
 325         len += 4 + 4; /* ipmi_bootdev, ipmi_bootdev_persistent */
 326
 327         len += 4; /* allow_writes */
 328
 329         len += 4; /* n_consoles */
 330         for (i = 0; i < config->n_consoles; i++)
 331                 len += 4 + optional_strlen(config->consoles[i]);
 332
 333         len += 4 + optional_strlen(config->boot_console);
 334         len += 4; /* manual_console */
 335
 336         len += 4 + optional_strlen(config->lang);
 337
 338         return len;
 339 }
 340
 341 int pb_protocol_url_len(const char *url)
 342 {
 343         /* url + length field */
 344         return 4 + optional_strlen(url);
 345 }
 346
 347
 348 int pb_protocol_plugin_option_len(const struct plugin_option *opt)
 349 {
 350         unsigned int i, len = 0;
 351
 352         len += 4 + optional_strlen(opt->id);
 353         len += 4 + optional_strlen(opt->name);
 354         len += 4 + optional_strlen(opt->vendor);
 355         len += 4 + optional_strlen(opt->vendor_id);
 356         len += 4 + optional_strlen(opt->version);
 357         len += 4 + optional_strlen(opt->date);
 358         len += 4 + optional_strlen(opt->plugin_file);
 359
 360         len += 4; /* n_executables */
 361         for (i = 0; i < opt->n_executables; i++)
 362                 len += 4 + optional_strlen(opt->executables[i]);
 363
 364         return len;
 365 }
 366
 367 int pb_protocol_temp_autoboot_len(const struct autoboot_option *opt)
 368 {
 369         unsigned int len = 0;
 370
 371         /* boot_type */
 372         len += 4;
 373
 374         if (opt->boot_type == BOOT_DEVICE_TYPE)
 375                 len += 4;
 376         else
 377                 len += optional_strlen(opt->uuid);
 378
 379         return len;
 380 }
 381
 382 int pb_protocol_authenticate_len(struct auth_message *msg)
 383 {
 384         switch (msg->op) {
 385         case AUTH_MSG_REQUEST:
 386                 /* enum + password + length */
 387                 return 4 + 4 + optional_strlen(msg->password);
 388         case AUTH_MSG_RESPONSE:
 389                 /* enum + bool */
 390                 return 4 + 4;
 391         case AUTH_MSG_SET:
 392                 /* enum + password + password */
 393                 return 4 + 4 + optional_strlen(msg->set_password.password) +
 394                         4 + optional_strlen(msg->set_password.new_password);
 395         default:
 396                 pb_log("%s: invalid input\n", __func__);
 397                 return 0;
 398         }
 399 }
 400
 401 int pb_protocol_serialise_device(const struct device *dev,
 402                 char *buf, int buf_len)
 403 {
 404         char *pos = buf;
 405
 406         pos += pb_protocol_serialise_string(pos, dev->id);
 407         *(enum device_type *)pos = dev->type;
 408         pos += sizeof(enum device_type);
 409         pos += pb_protocol_serialise_string(pos, dev->name);
 410         pos += pb_protocol_serialise_string(pos, dev->description);
 411         pos += pb_protocol_serialise_string(pos, dev->icon_file);
 412
 413         assert(pos <= buf + buf_len);
 414         (void)buf_len;
 415
 416         return 0;
 417 }
 418
 419 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
 420                 char *buf, int buf_len)
 421 {
 422         char *pos = buf;
 423
 424         pos += pb_protocol_serialise_string(pos, opt->device_id);
 425         pos += pb_protocol_serialise_string(pos, opt->id);
 426         pos += pb_protocol_serialise_string(pos, opt->name);
 427         pos += pb_protocol_serialise_string(pos, opt->description);
 428         pos += pb_protocol_serialise_string(pos, opt->icon_file);
 429         pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
 430         pos += pb_protocol_serialise_string(pos, opt->initrd_file);
 431         pos += pb_protocol_serialise_string(pos, opt->dtb_file);
 432         pos += pb_protocol_serialise_string(pos, opt->boot_args);
 433         pos += pb_protocol_serialise_string(pos, opt->args_sig_file);
 434
 435         *(bool *)pos = opt->is_default;
 436         pos += sizeof(bool);
 437
 438         *(uint32_t *)pos = __cpu_to_be32(opt->type);
 439         pos += 4;
 440
 441         assert(pos <= buf + buf_len);
 442         (void)buf_len;
 443
 444         return 0;
 445 }
 446
 447 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 448                 char *buf, int buf_len)
 449 {
 450         char *pos = buf;
 451
 452         pos += pb_protocol_serialise_string(pos, boot->option_id);
 453         pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
 454         pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 455         pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 456         pos += pb_protocol_serialise_string(pos, boot->boot_args);
 457         pos += pb_protocol_serialise_string(pos, boot->args_sig_file);
 458         pos += pb_protocol_serialise_string(pos, boot->console);
 459
 460         assert(pos <= buf + buf_len);
 461         (void)buf_len;
 462
 463         return 0;
 464 }
 465
 466 int pb_protocol_serialise_boot_status(const struct status *status,
 467                 char *buf, int buf_len)
 468 {
 469         char *pos = buf;
 470
 471         *(uint32_t *)pos = __cpu_to_be32(status->type);
 472         pos += sizeof(uint32_t);
 473
 474         pos += pb_protocol_serialise_string(pos, status->message);
 475
 476         *(bool *)pos = __cpu_to_be32(status->backlog);
 477         pos += sizeof(bool);
 478
 479         *(bool *)pos = __cpu_to_be32(status->boot_active);
 480         pos += sizeof(bool);
 481
 482         assert(pos <= buf + buf_len);
 483         (void)buf_len;
 484
 485         return 0;
 486 }
 487
 488 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
 489                 char *buf, int buf_len)
 490 {
 491         char *pos = buf;
 492         unsigned int i;
 493
 494         pos += pb_protocol_serialise_string(pos, sysinfo->type);
 495         pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
 496
 497         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_primary);
 498         pos += sizeof(uint32_t);
 499         for (i = 0; i < sysinfo->n_primary; i++)
 500                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_primary[i]);
 501
 502         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_other);
 503         pos += sizeof(uint32_t);
 504         for (i = 0; i < sysinfo->n_other; i++)
 505                 pos += pb_protocol_serialise_string(pos, sysinfo->platform_other[i]);
 506
 507         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_current);
 508         pos += sizeof(uint32_t);
 509         for (i = 0; i < sysinfo->n_bmc_current; i++)
 510                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_current[i]);
 511
 512         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_bmc_golden);
 513         pos += sizeof(uint32_t);
 514         for (i = 0; i < sysinfo->n_bmc_golden; i++)
 515                 pos += pb_protocol_serialise_string(pos, sysinfo->bmc_golden[i]);
 516
 517         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
 518         pos += sizeof(uint32_t);
 519
 520         for (i = 0; i < sysinfo->n_interfaces; i++) {
 521                 struct interface_info *if_info = sysinfo->interfaces[i];
 522
 523                 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
 524                 pos += sizeof(uint32_t);
 525
 526                 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
 527                 pos += if_info->hwaddr_size;
 528
 529                 pos += pb_protocol_serialise_string(pos, if_info->name);
 530
 531                 *(bool *)pos = if_info->link;
 532                 pos += sizeof(bool);
 533
 534                 pos += pb_protocol_serialise_string(pos, if_info->address);
 535                 pos += pb_protocol_serialise_string(pos, if_info->address_v6);
 536         }
 537
 538         *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
 539         pos += sizeof(uint32_t);
 540
 541         for (i = 0; i < sysinfo->n_blockdevs; i++) {
 542                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 543
 544                 pos += pb_protocol_serialise_string(pos, bd_info->name);
 545                 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
 546                 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
 547         }
 548
 549         if (sysinfo->bmc_mac)
 550                 memcpy(pos, sysinfo->bmc_mac, HWADDR_SIZE);
 551         else
 552                 memset(pos, 0, HWADDR_SIZE);
 553         pos += HWADDR_SIZE;
 554
 555         assert(pos <= buf + buf_len);
 556         (void)buf_len;
 557
 558         return 0;
 559 }
 560
 561 static int pb_protocol_serialise_config_interface(char *buf,
 562                 struct interface_config *conf)
 563 {
 564         char *pos = buf;
 565
 566         memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
 567         pos += sizeof(conf->hwaddr);
 568
 569         *(uint32_t *)pos = conf->ignore;
 570         pos += 4;
 571
 572         if (conf->ignore)
 573                 return pos - buf;
 574
 575         *(uint32_t *)pos = __cpu_to_be32(conf->method);
 576         pos += 4;
 577
 578         if (conf->method == CONFIG_METHOD_STATIC) {
 579                 pos += pb_protocol_serialise_string(pos,
 580                                 conf->static_config.address);
 581                 pos += pb_protocol_serialise_string(pos,
 582                                 conf->static_config.gateway);
 583                 pos += pb_protocol_serialise_string(pos,
 584                                 conf->static_config.url);
 585         }
 586
 587         *(uint32_t *)pos = conf->override;
 588         pos += 4;
 589
 590         return pos - buf;
 591 }
 592
 593 int pb_protocol_serialise_config(const struct config *config,
 594                 char *buf, int buf_len)
 595 {
 596         char *pos = buf;
 597         unsigned int i;
 598
 599         *(uint32_t *)pos = config->autoboot_enabled;
 600         pos += 4;
 601
 602         *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
 603         pos += 4;
 604
 605         *(uint32_t *)pos = config->safe_mode;
 606         pos += 4;
 607
 608         *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
 609         pos += 4;
 610         for (i = 0; i < config->network.n_interfaces; i++) {
 611                 struct interface_config *iface =
 612                         config->network.interfaces[i];
 613                 pos += pb_protocol_serialise_config_interface(pos, iface);
 614         }
 615
 616         *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
 617         pos += 4;
 618         for (i = 0; i < config->network.n_dns_servers; i++) {
 619                 pos += pb_protocol_serialise_string(pos,
 620                                 config->network.dns_servers[i]);
 621         }
 622
 623         pos += pb_protocol_serialise_string(pos, config->http_proxy);
 624         pos += pb_protocol_serialise_string(pos, config->https_proxy);
 625
 626         *(uint32_t *)pos = __cpu_to_be32(config->n_autoboot_opts);
 627         pos += 4;
 628         for (i = 0; i < config->n_autoboot_opts; i++) {
 629                 *(uint32_t *)pos =
 630                         __cpu_to_be32(config->autoboot_opts[i].boot_type);
 631                 pos += 4;
 632                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
 633                         *(uint32_t *)pos =
 634                                 __cpu_to_be32(config->autoboot_opts[i].type);
 635                         pos += 4;
 636                 } else {
 637                         pos += pb_protocol_serialise_string(pos,
 638                                                 config->autoboot_opts[i].uuid);
 639                 }
 640         }
 641
 642         *(uint32_t *)pos = __cpu_to_be32(config->ipmi_bootdev);
 643         pos += 4;
 644         *(uint32_t *)pos = config->ipmi_bootdev_persistent;
 645         pos += 4;
 646
 647         *(uint32_t *)pos = config->allow_writes;
 648         pos += 4;
 649
 650         *(uint32_t *)pos = __cpu_to_be32(config->n_consoles);
 651         pos += 4;
 652         for (i = 0; i < config->n_consoles; i++)
 653                 pos += pb_protocol_serialise_string(pos, config->consoles[i]);
 654
 655         pos += pb_protocol_serialise_string(pos, config->boot_console);
 656         *(uint32_t *)pos = config->manual_console;
 657         pos += 4;
 658
 659         pos += pb_protocol_serialise_string(pos, config->lang);
 660
 661         assert(pos <= buf + buf_len);
 662         (void)buf_len;
 663
 664         return 0;
 665 }
 666
 667 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
 668 {
 669         char *pos = buf;
 670
 671         pos += pb_protocol_serialise_string(pos, url);
 672
 673         assert(pos <=buf+buf_len);
 674         (void)buf_len;
 675
 676         return 0;
 677 }
 678
 679 int pb_protocol_serialise_plugin_option(const struct plugin_option *opt,
 680                 char *buf, int buf_len)
 681 {
 682         char *pos = buf;
 683         unsigned int i;
 684
 685         pos += pb_protocol_serialise_string(pos, opt->id);
 686         pos += pb_protocol_serialise_string(pos, opt->name);
 687         pos += pb_protocol_serialise_string(pos, opt->vendor);
 688         pos += pb_protocol_serialise_string(pos, opt->vendor_id);
 689         pos += pb_protocol_serialise_string(pos, opt->version);
 690         pos += pb_protocol_serialise_string(pos, opt->date);
 691         pos += pb_protocol_serialise_string(pos, opt->plugin_file);
 692
 693         *(uint32_t *)pos = __cpu_to_be32(opt->n_executables);
 694         pos += 4;
 695
 696         for (i = 0; i < opt->n_executables; i++)
 697                 pos += pb_protocol_serialise_string(pos, opt->executables[i]);
 698
 699         assert(pos <= buf + buf_len);
 700         (void)buf_len;
 701
 702         return 0;
 703 }
 704
 705 int pb_protocol_serialise_temp_autoboot(const struct autoboot_option *opt,
 706                 char *buf, int buf_len)
 707 {
 708         char *pos = buf;
 709
 710         *(uint32_t *)pos = __cpu_to_be32(opt->boot_type);
 711         pos += 4;
 712
 713         if (opt->boot_type == BOOT_DEVICE_TYPE) {
 714                 *(uint32_t *)pos = __cpu_to_be32(opt->type);
 715                 pos += 4;
 716         } else {
 717                 pos += pb_protocol_serialise_string(pos, opt->uuid);
 718         }
 719
 720         (void)buf_len;
 721
 722         return 0;
 723 }
 724
 725 int pb_protocol_serialise_authenticate(struct auth_message *msg,
 726                 char *buf, int buf_len)
 727 {
 728         char *pos = buf;
 729
 730         *(enum auth_msg_type *)pos = msg->op;
 731         pos += sizeof(enum auth_msg_type);
 732
 733         switch(msg->op) {
 734         case AUTH_MSG_REQUEST:
 735                 pos += pb_protocol_serialise_string(pos, msg->password);
 736                 break;
 737         case AUTH_MSG_RESPONSE:
 738                 *(bool *)pos = msg->authenticated;
 739                 pos += sizeof(bool);
 740                 break;
 741         case AUTH_MSG_SET:
 742                 pos += pb_protocol_serialise_string(pos,
 743                                 msg->set_password.password);
 744                 pos += pb_protocol_serialise_string(pos,
 745                                 msg->set_password.new_password);
 746                 break;
 747         default:
 748                 pb_log("%s: invalid msg\n", __func__);
 749                 return -1;
 750         };
 751
 752         assert(pos <= buf + buf_len);
 753         (void)buf_len;
 754
 755         return 0;
 756 }
 757
 758 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 759 {
 760         int total_len, rc;
 761         char *pos;
 762
 763         total_len = sizeof(*message) + message->payload_len;
 764
 765         message->payload_len = __cpu_to_be32(message->payload_len);
 766         message->action = __cpu_to_be32(message->action);
 767
 768         for (pos = (void *)message; total_len;) {
 769                 rc = write(fd, pos, total_len);
 770
 771                 if (rc <= 0)
 772                         break;
 773
 774                 total_len -= rc;
 775                 pos += rc;
 776         }
 777
 778         talloc_free(message);
 779
 780         if (!total_len)
 781                 return 0;
 782
 783         pb_log_fn("failed: %s\n", strerror(errno));
 784         return -1;
 785 }
 786
 787 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
 788                 enum pb_protocol_action action, int payload_len)
 789 {
 790         struct pb_protocol_message *message;
 791
 792         if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 793                 pb_log_fn("payload too big %u/%u\n", payload_len,
 794                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 795                 return NULL;
 796         }
 797
 798         message = talloc_size(ctx, sizeof(*message) + payload_len);
 799
 800         /* we convert these to big-endian in write_message() */
 801         message->action = action;
 802         message->payload_len = payload_len;
 803
 804         return message;
 805
 806 }
 807
 808 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
 809 {
 810         struct pb_protocol_message *message, m;
 811         int rc;
 812         unsigned int len;
 813
 814         /* use the stack for the initial 8-byte read */
 815
 816         rc = read(fd, &m, sizeof(m));
 817         if (rc != sizeof(m))
 818                 return NULL;
 819
 820         m.payload_len = __be32_to_cpu(m.payload_len);
 821         m.action = __be32_to_cpu(m.action);
 822
 823         if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
 824                 pb_log_fn("payload too big %u/%u\n", m.payload_len,
 825                         PB_PROTOCOL_MAX_PAYLOAD_SIZE);
 826                 return NULL;
 827         }
 828
 829         message = talloc_size(ctx, sizeof(m) + m.payload_len);
 830         memcpy(message, &m, sizeof(m));
 831
 832         for (len = 0; len < m.payload_len;) {
 833                 rc = read(fd, message->payload + len, m.payload_len - len);
 834
 835                 if (rc <= 0) {
 836                         talloc_free(message);
 837                         pb_log_fn("failed (%u): %s\n", len,
 838                                 strerror(errno));
 839                         return NULL;
 840                 }
 841
 842                 len += rc;
 843         }
 844
 845         return message;
 846 }
 847
 848
 849 int pb_protocol_deserialise_device(struct device *dev,
 850                 const struct pb_protocol_message *message)
 851 {
 852         unsigned int len;
 853         const char *pos;
 854         int rc = -1;
 855
 856         len = message->payload_len;
 857         pos = message->payload;
 858
 859         if (read_string(dev, &pos, &len, &dev->id))
 860                 goto out;
 861
 862         if (len < sizeof(enum device_type))
 863                 goto out;
 864         dev->type = *(enum device_type *)(pos);
 865         pos += sizeof(enum device_type);
 866         len -= sizeof(enum device_type);
 867
 868         if (read_string(dev, &pos, &len, &dev->name))
 869                 goto out;
 870
 871         if (read_string(dev, &pos, &len, &dev->description))
 872                 goto out;
 873
 874         if (read_string(dev, &pos, &len, &dev->icon_file))
 875                 goto out;
 876
 877         rc = 0;
 878
 879 out:
 880         return rc;
 881 }
 882
 883 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
 884                 const struct pb_protocol_message *message)
 885 {
 886         unsigned int len;
 887         const char *pos;
 888         int rc = -1;
 889
 890         len = message->payload_len;
 891         pos = message->payload;
 892
 893         if (read_string(opt, &pos, &len, &opt->device_id))
 894                 goto out;
 895
 896         if (read_string(opt, &pos, &len, &opt->id))
 897                 goto out;
 898
 899         if (read_string(opt, &pos, &len, &opt->name))
 900                 goto out;
 901
 902         if (read_string(opt, &pos, &len, &opt->description))
 903                 goto out;
 904
 905         if (read_string(opt, &pos, &len, &opt->icon_file))
 906                 goto out;
 907
 908         if (read_string(opt, &pos, &len, &opt->boot_image_file))
 909                 goto out;
 910
 911         if (read_string(opt, &pos, &len, &opt->initrd_file))
 912                 goto out;
 913
 914         if (read_string(opt, &pos, &len, &opt->dtb_file))
 915                 goto out;
 916
 917         if (read_string(opt, &pos, &len, &opt->boot_args))
 918                 goto out;
 919
 920         if (read_string(opt, &pos, &len, &opt->args_sig_file))
 921                 goto out;
 922
 923         if (len < sizeof(bool))
 924                 goto out;
 925         opt->is_default = *(bool *)(pos);
 926         pos += sizeof(bool);
 927         len -= sizeof(bool);
 928
 929         if (read_u32(&pos, &len, &opt->type))
 930                 return -1;
 931
 932         rc = 0;
 933
 934 out:
 935         return rc;
 936 }
 937
 938 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 939                 const struct pb_protocol_message *message)
 940 {
 941         unsigned int len;
 942         const char *pos;
 943         int rc = -1;
 944
 945         len = message->payload_len;
 946         pos = message->payload;
 947
 948         if (read_string(cmd, &pos, &len, &cmd->option_id))
 949                 goto out;
 950
 951         if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
 952                 goto out;
 953
 954         if (read_string(cmd, &pos, &len, &cmd->initrd_file))
 955                 goto out;
 956
 957         if (read_string(cmd, &pos, &len, &cmd->dtb_file))
 958                 goto out;
 959
 960         if (read_string(cmd, &pos, &len, &cmd->boot_args))
 961                 goto out;
 962
 963         if (read_string(cmd, &pos, &len, &cmd->args_sig_file))
 964                 goto out;
 965
 966         if (read_string(cmd, &pos, &len, &cmd->console))
 967                 goto out;
 968
 969         rc = 0;
 970
 971 out:
 972         return rc;
 973 }
 974
 975 int pb_protocol_deserialise_boot_status(struct status *status,
 976                 const struct pb_protocol_message *message)
 977 {
 978         unsigned int len;
 979         const char *pos;
 980         int rc = -1;
 981
 982         len = message->payload_len;
 983         pos = message->payload;
 984
 985         /* first up, the type enum... */
 986         if (len < sizeof(uint32_t))
 987                 goto out;
 988
 989         status->type = __be32_to_cpu(*(uint32_t *)(pos));
 990
 991         switch (status->type) {
 992         case STATUS_ERROR:
 993         case STATUS_INFO:
 994                 break;
 995         default:
 996                 goto out;
 997         }
 998
 999         pos += sizeof(uint32_t);
1000         len -= sizeof(uint32_t);
1001
1002         /* message string */
1003         if (read_string(status, &pos, &len, &status->message))
1004                 goto out;
1005
1006         /* backlog */
1007         status->backlog = *(bool *)pos;
1008         pos += sizeof(status->backlog);
1009
1010         /* boot_active */
1011         status->boot_active = *(bool *)pos;
1012         pos += sizeof(status->boot_active);
1013
1014         rc = 0;
1015
1016 out:
1017         return rc;
1018 }
1019
1020 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
1021                 const struct pb_protocol_message *message)
1022 {
1023         unsigned int len, i;
1024         const char *pos;
1025         int rc = -1;
1026         char *tmp;
1027
1028         len = message->payload_len;
1029         pos = message->payload;
1030
1031         /* type and identifier strings */
1032         if (read_string(sysinfo, &pos, &len, &sysinfo->type))
1033                 goto out;
1034
1035         if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
1036                 goto out;
1037
1038         /* Platform version strings for openpower platforms */
1039         if (read_u32(&pos, &len, &sysinfo->n_primary))
1040                 goto out;
1041         sysinfo->platform_primary = talloc_array(sysinfo, char *,
1042                                                 sysinfo->n_primary);
1043         for (i = 0; i < sysinfo->n_primary; i++) {
1044                 if (read_string(sysinfo, &pos, &len, &tmp))
1045                         goto out;
1046                 sysinfo->platform_primary[i] = talloc_strdup(sysinfo, tmp);
1047         }
1048
1049         if (read_u32(&pos, &len, &sysinfo->n_other))
1050                 goto out;
1051         sysinfo->platform_other = talloc_array(sysinfo, char *,
1052                                                 sysinfo->n_other);
1053         for (i = 0; i < sysinfo->n_other; i++) {
1054                 if (read_string(sysinfo, &pos, &len, &tmp))
1055                         goto out;
1056                 sysinfo->platform_other[i] = talloc_strdup(sysinfo, tmp);
1057         }
1058
1059         /* BMC version strings for openpower platforms */
1060         if (read_u32(&pos, &len, &sysinfo->n_bmc_current))
1061                 goto out;
1062         sysinfo->bmc_current = talloc_array(sysinfo, char *,
1063                                                 sysinfo->n_bmc_current);
1064         for (i = 0; i < sysinfo->n_bmc_current; i++) {
1065                 if (read_string(sysinfo, &pos, &len, &tmp))
1066                         goto out;
1067                 sysinfo->bmc_current[i] = talloc_strdup(sysinfo, tmp);
1068         }
1069
1070         if (read_u32(&pos, &len, &sysinfo->n_bmc_golden))
1071                 goto out;
1072         sysinfo->bmc_golden = talloc_array(sysinfo, char *,
1073                                                 sysinfo->n_bmc_golden);
1074         for (i = 0; i < sysinfo->n_bmc_golden; i++) {
1075                 if (read_string(sysinfo, &pos, &len, &tmp))
1076                         goto out;
1077                 sysinfo->bmc_golden[i] = talloc_strdup(sysinfo, tmp);
1078         }
1079
1080         /* number of interfaces */
1081         if (read_u32(&pos, &len, &sysinfo->n_interfaces))
1082                 goto out;
1083
1084         sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
1085                         sysinfo->n_interfaces);
1086
1087         for (i = 0; i < sysinfo->n_interfaces; i++) {
1088                 struct interface_info *if_info = talloc(sysinfo,
1089                                                         struct interface_info);
1090
1091                 if (read_u32(&pos, &len, &if_info->hwaddr_size))
1092                         goto out;
1093
1094                 if (len < if_info->hwaddr_size)
1095                         goto out;
1096
1097                 if_info->hwaddr = talloc_memdup(if_info, pos,
1098                                                 if_info->hwaddr_size);
1099                 pos += if_info->hwaddr_size;
1100                 len -= if_info->hwaddr_size;
1101
1102                 if (read_string(if_info, &pos, &len, &if_info->name))
1103                         goto out;
1104
1105                 if_info->link = *(bool *)pos;
1106                 pos += sizeof(if_info->link);
1107
1108                 if (read_string(if_info, &pos, &len, &if_info->address))
1109                         goto out;
1110                 if (read_string(if_info, &pos, &len, &if_info->address_v6))
1111                         goto out;
1112
1113                 sysinfo->interfaces[i] = if_info;
1114         }
1115
1116         /* number of interfaces */
1117         if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
1118                 goto out;
1119
1120         sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
1121                         sysinfo->n_blockdevs);
1122
1123         for (i = 0; i < sysinfo->n_blockdevs; i++) {
1124                 struct blockdev_info *bd_info = talloc(sysinfo,
1125                                                         struct blockdev_info);
1126
1127                 if (read_string(bd_info, &pos, &len, &bd_info->name))
1128                         goto out;
1129
1130                 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
1131                         goto out;
1132
1133                 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
1134                         goto out;
1135
1136                 sysinfo->blockdevs[i] = bd_info;
1137         }
1138
1139         for (i = 0; i < HWADDR_SIZE; i++) {
1140                 if (pos[i] != 0) {
1141                         sysinfo->bmc_mac = talloc_memdup(sysinfo, pos, HWADDR_SIZE);
1142                         break;
1143                 }
1144         }
1145
1146         pos += HWADDR_SIZE;
1147         len -= HWADDR_SIZE;
1148
1149         rc = 0;
1150 out:
1151         return rc;
1152 }
1153
1154 static int pb_protocol_deserialise_config_interface(const char **buf,
1155                 unsigned int *len, struct interface_config *iface)
1156 {
1157         unsigned int tmp;
1158
1159         if (*len < sizeof(iface->hwaddr))
1160                 return -1;
1161
1162         memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
1163         *buf += sizeof(iface->hwaddr);
1164         *len -= sizeof(iface->hwaddr);
1165
1166         if (read_u32(buf, len, &tmp))
1167                 return -1;
1168         iface->ignore = !!tmp;
1169
1170         if (iface->ignore)
1171                 return 0;
1172
1173         if (read_u32(buf, len, &iface->method))
1174                 return -1;
1175
1176         if (iface->method == CONFIG_METHOD_STATIC) {
1177                 if (read_string(iface, buf, len, &iface->static_config.address))
1178                         return -1;
1179
1180                 if (read_string(iface, buf, len, &iface->static_config.gateway))
1181                         return -1;
1182
1183                 if (read_string(iface, buf, len, &iface->static_config.url))
1184                         return -1;
1185         }
1186
1187         if (read_u32(buf, len, &tmp))
1188                 return -1;
1189         iface->override = !!tmp;
1190
1191         return 0;
1192 }
1193
1194 int pb_protocol_deserialise_config(struct config *config,
1195                 const struct pb_protocol_message *message)
1196 {
1197         unsigned int len, i, tmp;
1198         const char *pos;
1199         int rc = -1;
1200         char *str;
1201
1202         len = message->payload_len;
1203         pos = message->payload;
1204
1205         if (read_u32(&pos, &len, &tmp))
1206                 goto out;
1207         config->autoboot_enabled = !!tmp;
1208
1209         if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
1210                 goto out;
1211
1212         if (read_u32(&pos, &len, &tmp))
1213                 goto out;
1214         config->safe_mode = !!tmp;
1215
1216         if (read_u32(&pos, &len, &config->network.n_interfaces))
1217                 goto out;
1218
1219         config->network.interfaces = talloc_array(config,
1220                         struct interface_config *, config->network.n_interfaces);
1221
1222         for (i = 0; i < config->network.n_interfaces; i++) {
1223                 struct interface_config *iface = talloc_zero(
1224                                 config->network.interfaces,
1225                                 struct interface_config);
1226                 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
1227                         goto out;
1228                 config->network.interfaces[i] = iface;
1229         }
1230
1231         if (read_u32(&pos, &len, &config->network.n_dns_servers))
1232                 goto out;
1233         config->network.dns_servers = talloc_array(config, const char *,
1234                         config->network.n_dns_servers);
1235
1236         for (i = 0; i < config->network.n_dns_servers; i++) {
1237                 if (read_string(config->network.dns_servers, &pos, &len, &str))
1238                         goto out;
1239                 config->network.dns_servers[i] = str;
1240         }
1241
1242         if (read_string(config, &pos, &len, &str))
1243                 goto out;
1244         config->http_proxy = str;
1245         if (read_string(config, &pos, &len, &str))
1246                 goto out;
1247         config->https_proxy = str;
1248
1249         if (read_u32(&pos, &len, &config->n_autoboot_opts))
1250                 goto out;
1251         config->autoboot_opts = talloc_array(config, struct autoboot_option,
1252                         config->n_autoboot_opts);
1253
1254         for (i = 0; i < config->n_autoboot_opts; i++) {
1255                 if (read_u32(&pos, &len, &tmp))
1256                         goto out;
1257                 config->autoboot_opts[i].boot_type = (int)tmp;
1258                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE) {
1259                         if (read_u32(&pos, &len, &tmp))
1260                                 goto out;
1261                         config->autoboot_opts[i].type = tmp;
1262                 } else {
1263                         if (read_string(config, &pos, &len, &str))
1264                                 goto out;
1265                         config->autoboot_opts[i].uuid = str;
1266                 }
1267         }
1268
1269         if (read_u32(&pos, &len, &config->ipmi_bootdev))
1270                 goto out;
1271         if (read_u32(&pos, &len, &tmp))
1272                 goto out;
1273         config->ipmi_bootdev_persistent = !!tmp;
1274
1275         if (read_u32(&pos, &len, &tmp))
1276                 goto out;
1277         config->allow_writes = !!tmp;
1278
1279         if (read_u32(&pos, &len, &config->n_consoles))
1280                 goto out;
1281
1282         config->consoles = talloc_array(config, char *, config->n_consoles);
1283         for (i = 0; i < config->n_consoles; i++) {
1284                 if (read_string(config->consoles, &pos, &len, &str))
1285                         goto out;
1286                 config->consoles[i] = str;
1287         }
1288
1289         if (read_string(config, &pos, &len, &str))
1290                 goto out;
1291
1292         config->boot_console = str;
1293
1294         if (read_u32(&pos, &len, &tmp))
1295                 goto out;
1296         config->manual_console = !!tmp;
1297
1298         if (read_string(config, &pos, &len, &str))
1299                 goto out;
1300
1301         config->lang = str;
1302
1303         rc = 0;
1304
1305 out:
1306         return rc;
1307 }
1308
1309 int pb_protocol_deserialise_plugin_option(struct plugin_option *opt,
1310                 const struct pb_protocol_message *message)
1311 {
1312         unsigned int len, i, tmp;
1313         const char *pos;
1314         int rc = -1;
1315         char *str;
1316
1317         len = message->payload_len;
1318         pos = message->payload;
1319
1320         if (read_string(opt, &pos, &len, &str))
1321                 goto out;
1322         opt->id = str;
1323
1324         if (read_string(opt, &pos, &len, &str))
1325                 goto out;
1326         opt->name = str;
1327
1328         if (read_string(opt, &pos, &len, &str))
1329                 goto out;
1330         opt->vendor = str;
1331
1332         if (read_string(opt, &pos, &len, &str))
1333                 goto out;
1334         opt->vendor_id = str;
1335
1336         if (read_string(opt, &pos, &len, &str))
1337                 goto out;
1338         opt->version = str;
1339
1340         if (read_string(opt, &pos, &len, &str))
1341                 goto out;
1342         opt->date = str;
1343
1344         if (read_string(opt, &pos, &len, &str))
1345                 goto out;
1346         opt->plugin_file = str;
1347
1348         if (read_u32(&pos, &len, &tmp))
1349                 goto out;
1350         opt->n_executables = tmp;
1351
1352         opt->executables = talloc_zero_array(opt, char *, opt->n_executables);
1353         if (!opt->executables)
1354                 goto out;
1355
1356         for (i = 0; i < opt->n_executables; i++) {
1357                 if (read_string(opt, &pos, &len, &str))
1358                         goto out;
1359                 opt->executables[i] = talloc_strdup(opt, str);
1360         }
1361
1362         rc = 0;
1363 out:
1364         return rc;
1365 }
1366
1367 int pb_protocol_deserialise_temp_autoboot(struct autoboot_option *opt,
1368                 const struct pb_protocol_message *message)
1369 {
1370         unsigned int len, tmp;
1371         const char *pos;
1372         int rc = -1;
1373         char *str;
1374
1375         len = message->payload_len;
1376         pos = message->payload;
1377
1378         if (read_u32(&pos, &len, &tmp))
1379                 goto out;
1380
1381         opt->boot_type = tmp;
1382         if (opt->boot_type == BOOT_DEVICE_TYPE) {
1383                 if (read_u32(&pos, &len, &tmp))
1384                         goto out;
1385                 opt->type = tmp;
1386
1387         } else if (opt->boot_type == BOOT_DEVICE_UUID) {
1388                 if (read_string(opt, &pos, &len, &str))
1389                         goto out;
1390                 opt->uuid = str;
1391
1392         } else {
1393                 return -1;
1394         }
1395
1396         rc = 0;
1397
1398 out:
1399         return rc;
1400 }
1401
1402 int pb_protocol_deserialise_authenticate(struct auth_message *msg,
1403                 const struct pb_protocol_message *message)
1404 {
1405         unsigned int len;
1406         const char *pos;
1407
1408         len = message->payload_len;
1409         pos = message->payload;
1410
1411         msg->op = *(enum auth_msg_type *)pos;
1412         pos += sizeof(enum auth_msg_type);
1413
1414         switch (msg->op) {
1415         case AUTH_MSG_REQUEST:
1416                 if (read_string(msg, &pos, &len, &msg->password))
1417                         return -1;
1418                 break;
1419         case AUTH_MSG_RESPONSE:
1420                 msg->authenticated = *(bool *)pos;
1421                 pos += sizeof(bool);
1422                 break;
1423         case AUTH_MSG_SET:
1424                 if (read_string(msg, &pos, &len, &msg->set_password.password))
1425                         return -1;
1426                 if (read_string(msg, &pos, &len,
1427                                         &msg->set_password.new_password))
1428                         return -1;
1429                 break;
1430         default:
1431                 pb_log("%s: unable to parse\n", __func__);
1432                 return -1;
1433         }
1434
1435         return 0;
1436 }