tools/hv/hv_kvp_daemon.c

   1 /*
   2  * An implementation of key value pair (KVP) functionality for Linux.
   3  *
   4  *
   5  * Copyright (C) 2010, Novell, Inc.
   6  * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 as published
  10  * by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  15  * NON INFRINGEMENT.  See the GNU General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  */
  23
  24
  25 #include <sys/poll.h>
  26 #include <sys/utsname.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <ctype.h>
  32 #include <errno.h>
  33 #include <arpa/inet.h>
  34 #include <linux/hyperv.h>
  35 #include <ifaddrs.h>
  36 #include <netdb.h>
  37 #include <syslog.h>
  38 #include <sys/stat.h>
  39 #include <fcntl.h>
  40 #include <dirent.h>
  41 #include <net/if.h>
  42 #include <limits.h>
  43 #include <getopt.h>
  44
  45 /*
  46  * KVP protocol: The user mode component first registers with the
  47  * the kernel component. Subsequently, the kernel component requests, data
  48  * for the specified keys. In response to this message the user mode component
  49  * fills in the value corresponding to the specified key. We overload the
  50  * sequence field in the cn_msg header to define our KVP message types.
  51  *
  52  * We use this infrastructure for also supporting queries from user mode
  53  * application for state that may be maintained in the KVP kernel component.
  54  *
  55  */
  56
  57
  58 enum key_index {
  59         FullyQualifiedDomainName = 0,
  60         IntegrationServicesVersion, /*This key is serviced in the kernel*/
  61         NetworkAddressIPv4,
  62         NetworkAddressIPv6,
  63         OSBuildNumber,
  64         OSName,
  65         OSMajorVersion,
  66         OSMinorVersion,
  67         OSVersion,
  68         ProcessorArchitecture
  69 };
  70
  71
  72 enum {
  73         IPADDR = 0,
  74         NETMASK,
  75         GATEWAY,
  76         DNS
  77 };
  78
  79 static int in_hand_shake = 1;
  80
  81 static char *os_name = "";
  82 static char *os_major = "";
  83 static char *os_minor = "";
  84 static char *processor_arch;
  85 static char *os_build;
  86 static char *os_version;
  87 static char *lic_version = "Unknown version";
  88 static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
  89 static struct utsname uts_buf;
  90
  91 /*
  92  * The location of the interface configuration file.
  93  */
  94
  95 #define KVP_CONFIG_LOC  "/var/lib/hyperv"
  96
  97 #ifndef KVP_SCRIPTS_PATH
  98 #define KVP_SCRIPTS_PATH "/usr/libexec/hypervkvpd/"
  99 #endif
 100
 101 #define KVP_NET_DIR "/sys/class/net/"
 102
 103 #define MAX_FILE_NAME 100
 104 #define ENTRIES_PER_BLOCK 50
 105
 106 struct kvp_record {
 107         char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
 108         char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
 109 };
 110
 111 struct kvp_file_state {
 112         int fd;
 113         int num_blocks;
 114         struct kvp_record *records;
 115         int num_records;
 116         char fname[MAX_FILE_NAME];
 117 };
 118
 119 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
 120
 121 static void kvp_acquire_lock(int pool)
 122 {
 123         struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
 124         fl.l_pid = getpid();
 125
 126         if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
 127                 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
 128                                 errno, strerror(errno));
 129                 exit(EXIT_FAILURE);
 130         }
 131 }
 132
 133 static void kvp_release_lock(int pool)
 134 {
 135         struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
 136         fl.l_pid = getpid();
 137
 138         if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
 139                 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
 140                                 errno, strerror(errno));
 141                 exit(EXIT_FAILURE);
 142         }
 143 }
 144
 145 static void kvp_update_file(int pool)
 146 {
 147         FILE *filep;
 148
 149         /*
 150          * We are going to write our in-memory registry out to
 151          * disk; acquire the lock first.
 152          */
 153         kvp_acquire_lock(pool);
 154
 155         filep = fopen(kvp_file_info[pool].fname, "we");
 156         if (!filep) {
 157                 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
 158                                 errno, strerror(errno));
 159                 kvp_release_lock(pool);
 160                 exit(EXIT_FAILURE);
 161         }
 162
 163         fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record),
 164                                 kvp_file_info[pool].num_records, filep);
 165
 166         if (ferror(filep) || fclose(filep)) {
 167                 kvp_release_lock(pool);
 168                 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
 169                 exit(EXIT_FAILURE);
 170         }
 171
 172         kvp_release_lock(pool);
 173 }
 174
 175 static void kvp_update_mem_state(int pool)
 176 {
 177         FILE *filep;
 178         size_t records_read = 0;
 179         struct kvp_record *record = kvp_file_info[pool].records;
 180         struct kvp_record *readp;
 181         int num_blocks = kvp_file_info[pool].num_blocks;
 182         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
 183
 184         kvp_acquire_lock(pool);
 185
 186         filep = fopen(kvp_file_info[pool].fname, "re");
 187         if (!filep) {
 188                 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
 189                                 errno, strerror(errno));
 190                 kvp_release_lock(pool);
 191                 exit(EXIT_FAILURE);
 192         }
 193         for (;;) {
 194                 readp = &record[records_read];
 195                 records_read += fread(readp, sizeof(struct kvp_record),
 196                                         ENTRIES_PER_BLOCK * num_blocks,
 197                                         filep);
 198
 199                 if (ferror(filep)) {
 200                         syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
 201                         exit(EXIT_FAILURE);
 202                 }
 203
 204                 if (!feof(filep)) {
 205                         /*
 206                          * We have more data to read.
 207                          */
 208                         num_blocks++;
 209                         record = realloc(record, alloc_unit * num_blocks);
 210
 211                         if (record == NULL) {
 212                                 syslog(LOG_ERR, "malloc failed");
 213                                 exit(EXIT_FAILURE);
 214                         }
 215                         continue;
 216                 }
 217                 break;
 218         }
 219
 220         kvp_file_info[pool].num_blocks = num_blocks;
 221         kvp_file_info[pool].records = record;
 222         kvp_file_info[pool].num_records = records_read;
 223
 224         fclose(filep);
 225         kvp_release_lock(pool);
 226 }
 227 static int kvp_file_init(void)
 228 {
 229         int  fd;
 230         FILE *filep;
 231         size_t records_read;
 232         char *fname;
 233         struct kvp_record *record;
 234         struct kvp_record *readp;
 235         int num_blocks;
 236         int i;
 237         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
 238
 239         if (access(KVP_CONFIG_LOC, F_OK)) {
 240                 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
 241                         syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
 242                                         errno, strerror(errno));
 243                         exit(EXIT_FAILURE);
 244                 }
 245         }
 246
 247         for (i = 0; i < KVP_POOL_COUNT; i++) {
 248                 fname = kvp_file_info[i].fname;
 249                 records_read = 0;
 250                 num_blocks = 1;
 251                 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
 252                 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
 253
 254                 if (fd == -1)
 255                         return 1;
 256
 257
 258                 filep = fopen(fname, "re");
 259                 if (!filep) {
 260                         close(fd);
 261                         return 1;
 262                 }
 263
 264                 record = malloc(alloc_unit * num_blocks);
 265                 if (record == NULL) {
 266                         fclose(filep);
 267                         close(fd);
 268                         return 1;
 269                 }
 270                 for (;;) {
 271                         readp = &record[records_read];
 272                         records_read += fread(readp, sizeof(struct kvp_record),
 273                                         ENTRIES_PER_BLOCK,
 274                                         filep);
 275
 276                         if (ferror(filep)) {
 277                                 syslog(LOG_ERR, "Failed to read file, pool: %d",
 278                                        i);
 279                                 exit(EXIT_FAILURE);
 280                         }
 281
 282                         if (!feof(filep)) {
 283                                 /*
 284                                  * We have more data to read.
 285                                  */
 286                                 num_blocks++;
 287                                 record = realloc(record, alloc_unit *
 288                                                 num_blocks);
 289                                 if (record == NULL) {
 290                                         fclose(filep);
 291                                         close(fd);
 292                                         return 1;
 293                                 }
 294                                 continue;
 295                         }
 296                         break;
 297                 }
 298                 kvp_file_info[i].fd = fd;
 299                 kvp_file_info[i].num_blocks = num_blocks;
 300                 kvp_file_info[i].records = record;
 301                 kvp_file_info[i].num_records = records_read;
 302                 fclose(filep);
 303
 304         }
 305
 306         return 0;
 307 }
 308
 309 static int kvp_key_delete(int pool, const __u8 *key, int key_size)
 310 {
 311         int i;
 312         int j, k;
 313         int num_records;
 314         struct kvp_record *record;
 315
 316         /*
 317          * First update the in-memory state.
 318          */
 319         kvp_update_mem_state(pool);
 320
 321         num_records = kvp_file_info[pool].num_records;
 322         record = kvp_file_info[pool].records;
 323
 324         for (i = 0; i < num_records; i++) {
 325                 if (memcmp(key, record[i].key, key_size))
 326                         continue;
 327                 /*
 328                  * Found a match; just move the remaining
 329                  * entries up.
 330                  */
 331                 if (i == num_records) {
 332                         kvp_file_info[pool].num_records--;
 333                         kvp_update_file(pool);
 334                         return 0;
 335                 }
 336
 337                 j = i;
 338                 k = j + 1;
 339                 for (; k < num_records; k++) {
 340                         strcpy(record[j].key, record[k].key);
 341                         strcpy(record[j].value, record[k].value);
 342                         j++;
 343                 }
 344
 345                 kvp_file_info[pool].num_records--;
 346                 kvp_update_file(pool);
 347                 return 0;
 348         }
 349         return 1;
 350 }
 351
 352 static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size,
 353                                  const __u8 *value, int value_size)
 354 {
 355         int i;
 356         int num_records;
 357         struct kvp_record *record;
 358         int num_blocks;
 359
 360         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
 361                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
 362                 return 1;
 363
 364         /*
 365          * First update the in-memory state.
 366          */
 367         kvp_update_mem_state(pool);
 368
 369         num_records = kvp_file_info[pool].num_records;
 370         record = kvp_file_info[pool].records;
 371         num_blocks = kvp_file_info[pool].num_blocks;
 372
 373         for (i = 0; i < num_records; i++) {
 374                 if (memcmp(key, record[i].key, key_size))
 375                         continue;
 376                 /*
 377                  * Found a match; just update the value -
 378                  * this is the modify case.
 379                  */
 380                 memcpy(record[i].value, value, value_size);
 381                 kvp_update_file(pool);
 382                 return 0;
 383         }
 384
 385         /*
 386          * Need to add a new entry;
 387          */
 388         if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
 389                 /* Need to allocate a larger array for reg entries. */
 390                 record = realloc(record, sizeof(struct kvp_record) *
 391                          ENTRIES_PER_BLOCK * (num_blocks + 1));
 392
 393                 if (record == NULL)
 394                         return 1;
 395                 kvp_file_info[pool].num_blocks++;
 396
 397         }
 398         memcpy(record[i].value, value, value_size);
 399         memcpy(record[i].key, key, key_size);
 400         kvp_file_info[pool].records = record;
 401         kvp_file_info[pool].num_records++;
 402         kvp_update_file(pool);
 403         return 0;
 404 }
 405
 406 static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value,
 407                         int value_size)
 408 {
 409         int i;
 410         int num_records;
 411         struct kvp_record *record;
 412
 413         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
 414                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
 415                 return 1;
 416
 417         /*
 418          * First update the in-memory state.
 419          */
 420         kvp_update_mem_state(pool);
 421
 422         num_records = kvp_file_info[pool].num_records;
 423         record = kvp_file_info[pool].records;
 424
 425         for (i = 0; i < num_records; i++) {
 426                 if (memcmp(key, record[i].key, key_size))
 427                         continue;
 428                 /*
 429                  * Found a match; just copy the value out.
 430                  */
 431                 memcpy(value, record[i].value, value_size);
 432                 return 0;
 433         }
 434
 435         return 1;
 436 }
 437
 438 static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
 439                                 __u8 *value, int value_size)
 440 {
 441         struct kvp_record *record;
 442
 443         /*
 444          * First update our in-memory database.
 445          */
 446         kvp_update_mem_state(pool);
 447         record = kvp_file_info[pool].records;
 448
 449         if (index >= kvp_file_info[pool].num_records) {
 450                 return 1;
 451         }
 452
 453         memcpy(key, record[index].key, key_size);
 454         memcpy(value, record[index].value, value_size);
 455         return 0;
 456 }
 457
 458
 459 void kvp_get_os_info(void)
 460 {
 461         FILE    *file;
 462         char    *p, buf[512];
 463
 464         uname(&uts_buf);
 465         os_version = uts_buf.release;
 466         os_build = strdup(uts_buf.release);
 467
 468         os_name = uts_buf.sysname;
 469         processor_arch = uts_buf.machine;
 470
 471         /*
 472          * The current windows host (win7) expects the build
 473          * string to be of the form: x.y.z
 474          * Strip additional information we may have.
 475          */
 476         p = strchr(os_version, '-');
 477         if (p)
 478                 *p = '\0';
 479
 480         /*
 481          * Parse the /etc/os-release file if present:
 482          * http://www.freedesktop.org/software/systemd/man/os-release.html
 483          */
 484         file = fopen("/etc/os-release", "r");
 485         if (file != NULL) {
 486                 while (fgets(buf, sizeof(buf), file)) {
 487                         char *value, *q;
 488
 489                         /* Ignore comments */
 490                         if (buf[0] == '#')
 491                                 continue;
 492
 493                         /* Split into name=value */
 494                         p = strchr(buf, '=');
 495                         if (!p)
 496                                 continue;
 497                         *p++ = 0;
 498
 499                         /* Remove quotes and newline; un-escape */
 500                         value = p;
 501                         q = p;
 502                         while (*p) {
 503                                 if (*p == '\\') {
 504                                         ++p;
 505                                         if (!*p)
 506                                                 break;
 507                                         *q++ = *p++;
 508                                 } else if (*p == '\'' || *p == '"' ||
 509                                            *p == '\n') {
 510                                         ++p;
 511                                 } else {
 512                                         *q++ = *p++;
 513                                 }
 514                         }
 515                         *q = 0;
 516
 517                         if (!strcmp(buf, "NAME")) {
 518                                 p = strdup(value);
 519                                 if (!p)
 520                                         break;
 521                                 os_name = p;
 522                         } else if (!strcmp(buf, "VERSION_ID")) {
 523                                 p = strdup(value);
 524                                 if (!p)
 525                                         break;
 526                                 os_major = p;
 527                         }
 528                 }
 529                 fclose(file);
 530                 return;
 531         }
 532
 533         /* Fallback for older RH/SUSE releases */
 534         file = fopen("/etc/SuSE-release", "r");
 535         if (file != NULL)
 536                 goto kvp_osinfo_found;
 537         file  = fopen("/etc/redhat-release", "r");
 538         if (file != NULL)
 539                 goto kvp_osinfo_found;
 540
 541         /*
 542          * We don't have information about the os.
 543          */
 544         return;
 545
 546 kvp_osinfo_found:
 547         /* up to three lines */
 548         p = fgets(buf, sizeof(buf), file);
 549         if (p) {
 550                 p = strchr(buf, '\n');
 551                 if (p)
 552                         *p = '\0';
 553                 p = strdup(buf);
 554                 if (!p)
 555                         goto done;
 556                 os_name = p;
 557
 558                 /* second line */
 559                 p = fgets(buf, sizeof(buf), file);
 560                 if (p) {
 561                         p = strchr(buf, '\n');
 562                         if (p)
 563                                 *p = '\0';
 564                         p = strdup(buf);
 565                         if (!p)
 566                                 goto done;
 567                         os_major = p;
 568
 569                         /* third line */
 570                         p = fgets(buf, sizeof(buf), file);
 571                         if (p)  {
 572                                 p = strchr(buf, '\n');
 573                                 if (p)
 574                                         *p = '\0';
 575                                 p = strdup(buf);
 576                                 if (p)
 577                                         os_minor = p;
 578                         }
 579                 }
 580         }
 581
 582 done:
 583         fclose(file);
 584         return;
 585 }
 586
 587
 588
 589 /*
 590  * Retrieve an interface name corresponding to the specified guid.
 591  * If there is a match, the function returns a pointer
 592  * to the interface name and if not, a NULL is returned.
 593  * If a match is found, the caller is responsible for
 594  * freeing the memory.
 595  */
 596
 597 static char *kvp_get_if_name(char *guid)
 598 {
 599         DIR *dir;
 600         struct dirent *entry;
 601         FILE    *file;
 602         char    *p, *x;
 603         char    *if_name = NULL;
 604         char    buf[256];
 605         char dev_id[PATH_MAX];
 606
 607         dir = opendir(KVP_NET_DIR);
 608         if (dir == NULL)
 609                 return NULL;
 610
 611         while ((entry = readdir(dir)) != NULL) {
 612                 /*
 613                  * Set the state for the next pass.
 614                  */
 615                 snprintf(dev_id, sizeof(dev_id), "%s%s/device/device_id",
 616                          KVP_NET_DIR, entry->d_name);
 617
 618                 file = fopen(dev_id, "r");
 619                 if (file == NULL)
 620                         continue;
 621
 622                 p = fgets(buf, sizeof(buf), file);
 623                 if (p) {
 624                         x = strchr(p, '\n');
 625                         if (x)
 626                                 *x = '\0';
 627
 628                         if (!strcmp(p, guid)) {
 629                                 /*
 630                                  * Found the guid match; return the interface
 631                                  * name. The caller will free the memory.
 632                                  */
 633                                 if_name = strdup(entry->d_name);
 634                                 fclose(file);
 635                                 break;
 636                         }
 637                 }
 638                 fclose(file);
 639         }
 640
 641         closedir(dir);
 642         return if_name;
 643 }
 644
 645 /*
 646  * Retrieve the MAC address given the interface name.
 647  */
 648
 649 static char *kvp_if_name_to_mac(char *if_name)
 650 {
 651         FILE    *file;
 652         char    *p, *x;
 653         char    buf[256];
 654         char addr_file[PATH_MAX];
 655         unsigned int i;
 656         char *mac_addr = NULL;
 657
 658         snprintf(addr_file, sizeof(addr_file), "%s%s%s", KVP_NET_DIR,
 659                  if_name, "/address");
 660
 661         file = fopen(addr_file, "r");
 662         if (file == NULL)
 663                 return NULL;
 664
 665         p = fgets(buf, sizeof(buf), file);
 666         if (p) {
 667                 x = strchr(p, '\n');
 668                 if (x)
 669                         *x = '\0';
 670                 for (i = 0; i < strlen(p); i++)
 671                         p[i] = toupper(p[i]);
 672                 mac_addr = strdup(p);
 673         }
 674
 675         fclose(file);
 676         return mac_addr;
 677 }
 678
 679
 680 /*
 681  * Retrieve the interface name given tha MAC address.
 682  */
 683
 684 static char *kvp_mac_to_if_name(char *mac)
 685 {
 686         DIR *dir;
 687         struct dirent *entry;
 688         FILE    *file;
 689         char    *p, *x;
 690         char    *if_name = NULL;
 691         char    buf[256];
 692         char dev_id[PATH_MAX];
 693         unsigned int i;
 694
 695         dir = opendir(KVP_NET_DIR);
 696         if (dir == NULL)
 697                 return NULL;
 698
 699         while ((entry = readdir(dir)) != NULL) {
 700                 /*
 701                  * Set the state for the next pass.
 702                  */
 703                 snprintf(dev_id, sizeof(dev_id), "%s%s/address", KVP_NET_DIR,
 704                          entry->d_name);
 705
 706                 file = fopen(dev_id, "r");
 707                 if (file == NULL)
 708                         continue;
 709
 710                 p = fgets(buf, sizeof(buf), file);
 711                 if (p) {
 712                         x = strchr(p, '\n');
 713                         if (x)
 714                                 *x = '\0';
 715
 716                         for (i = 0; i < strlen(p); i++)
 717                                 p[i] = toupper(p[i]);
 718
 719                         if (!strcmp(p, mac)) {
 720                                 /*
 721                                  * Found the MAC match; return the interface
 722                                  * name. The caller will free the memory.
 723                                  */
 724                                 if_name = strdup(entry->d_name);
 725                                 fclose(file);
 726                                 break;
 727                         }
 728                 }
 729                 fclose(file);
 730         }
 731
 732         closedir(dir);
 733         return if_name;
 734 }
 735
 736
 737 static void kvp_process_ipconfig_file(char *cmd,
 738                                         char *config_buf, unsigned int len,
 739                                         int element_size, int offset)
 740 {
 741         char buf[256];
 742         char *p;
 743         char *x;
 744         FILE *file;
 745
 746         /*
 747          * First execute the command.
 748          */
 749         file = popen(cmd, "r");
 750         if (file == NULL)
 751                 return;
 752
 753         if (offset == 0)
 754                 memset(config_buf, 0, len);
 755         while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
 756                 if (len < strlen(config_buf) + element_size + 1)
 757                         break;
 758
 759                 x = strchr(p, '\n');
 760                 if (x)
 761                         *x = '\0';
 762
 763                 strcat(config_buf, p);
 764                 strcat(config_buf, ";");
 765         }
 766         pclose(file);
 767 }
 768
 769 static void kvp_get_ipconfig_info(char *if_name,
 770                                  struct hv_kvp_ipaddr_value *buffer)
 771 {
 772         char cmd[512];
 773         char dhcp_info[128];
 774         char *p;
 775         FILE *file;
 776
 777         /*
 778          * Get the address of default gateway (ipv4).
 779          */
 780         sprintf(cmd, "%s %s", "ip route show dev", if_name);
 781         strcat(cmd, " | awk '/default/ {print $3 }'");
 782
 783         /*
 784          * Execute the command to gather gateway info.
 785          */
 786         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
 787                                 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
 788
 789         /*
 790          * Get the address of default gateway (ipv6).
 791          */
 792         sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
 793         strcat(cmd, " | awk '/default/ {print $3 }'");
 794
 795         /*
 796          * Execute the command to gather gateway info (ipv6).
 797          */
 798         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
 799                                 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
 800
 801
 802         /*
 803          * Gather the DNS  state.
 804          * Since there is no standard way to get this information
 805          * across various distributions of interest; we just invoke
 806          * an external script that needs to be ported across distros
 807          * of interest.
 808          *
 809          * Following is the expected format of the information from the script:
 810          *
 811          * ipaddr1 (nameserver1)
 812          * ipaddr2 (nameserver2)
 813          * .
 814          * .
 815          */
 816
 817         sprintf(cmd, KVP_SCRIPTS_PATH "%s",  "hv_get_dns_info");
 818
 819         /*
 820          * Execute the command to gather DNS info.
 821          */
 822         kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
 823                                 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
 824
 825         /*
 826          * Gather the DHCP state.
 827          * We will gather this state by invoking an external script.
 828          * The parameter to the script is the interface name.
 829          * Here is the expected output:
 830          *
 831          * Enabled: DHCP enabled.
 832          */
 833
 834         sprintf(cmd, KVP_SCRIPTS_PATH "%s %s", "hv_get_dhcp_info", if_name);
 835
 836         file = popen(cmd, "r");
 837         if (file == NULL)
 838                 return;
 839
 840         p = fgets(dhcp_info, sizeof(dhcp_info), file);
 841         if (p == NULL) {
 842                 pclose(file);
 843                 return;
 844         }
 845
 846         if (!strncmp(p, "Enabled", 7))
 847                 buffer->dhcp_enabled = 1;
 848         else
 849                 buffer->dhcp_enabled = 0;
 850
 851         pclose(file);
 852 }
 853
 854
 855 static unsigned int hweight32(unsigned int *w)
 856 {
 857         unsigned int res = *w - ((*w >> 1) & 0x55555555);
 858         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
 859         res = (res + (res >> 4)) & 0x0F0F0F0F;
 860         res = res + (res >> 8);
 861         return (res + (res >> 16)) & 0x000000FF;
 862 }
 863
 864 static int kvp_process_ip_address(void *addrp,
 865                                 int family, char *buffer,
 866                                 int length,  int *offset)
 867 {
 868         struct sockaddr_in *addr;
 869         struct sockaddr_in6 *addr6;
 870         int addr_length;
 871         char tmp[50];
 872         const char *str;
 873
 874         if (family == AF_INET) {
 875                 addr = (struct sockaddr_in *)addrp;
 876                 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
 877                 addr_length = INET_ADDRSTRLEN;
 878         } else {
 879                 addr6 = (struct sockaddr_in6 *)addrp;
 880                 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
 881                 addr_length = INET6_ADDRSTRLEN;
 882         }
 883
 884         if ((length - *offset) < addr_length + 2)
 885                 return HV_E_FAIL;
 886         if (str == NULL) {
 887                 strcpy(buffer, "inet_ntop failed\n");
 888                 return HV_E_FAIL;
 889         }
 890         if (*offset == 0)
 891                 strcpy(buffer, tmp);
 892         else {
 893                 strcat(buffer, ";");
 894                 strcat(buffer, tmp);
 895         }
 896
 897         *offset += strlen(str) + 1;
 898
 899         return 0;
 900 }
 901
 902 static int
 903 kvp_get_ip_info(int family, char *if_name, int op,
 904                  void  *out_buffer, unsigned int length)
 905 {
 906         struct ifaddrs *ifap;
 907         struct ifaddrs *curp;
 908         int offset = 0;
 909         int sn_offset = 0;
 910         int error = 0;
 911         char *buffer;
 912         struct hv_kvp_ipaddr_value *ip_buffer;
 913         char cidr_mask[5]; /* /xyz */
 914         int weight;
 915         int i;
 916         unsigned int *w;
 917         char *sn_str;
 918         struct sockaddr_in6 *addr6;
 919
 920         if (op == KVP_OP_ENUMERATE) {
 921                 buffer = out_buffer;
 922         } else {
 923                 ip_buffer = out_buffer;
 924                 buffer = (char *)ip_buffer->ip_addr;
 925                 ip_buffer->addr_family = 0;
 926         }
 927         /*
 928          * On entry into this function, the buffer is capable of holding the
 929          * maximum key value.
 930          */
 931
 932         if (getifaddrs(&ifap)) {
 933                 strcpy(buffer, "getifaddrs failed\n");
 934                 return HV_E_FAIL;
 935         }
 936
 937         curp = ifap;
 938         while (curp != NULL) {
 939                 if (curp->ifa_addr == NULL) {
 940                         curp = curp->ifa_next;
 941                         continue;
 942                 }
 943
 944                 if ((if_name != NULL) &&
 945                         (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
 946                         /*
 947                          * We want info about a specific interface;
 948                          * just continue.
 949                          */
 950                         curp = curp->ifa_next;
 951                         continue;
 952                 }
 953
 954                 /*
 955                  * We only support two address families: AF_INET and AF_INET6.
 956                  * If a family value of 0 is specified, we collect both
 957                  * supported address families; if not we gather info on
 958                  * the specified address family.
 959                  */
 960                 if ((((family != 0) &&
 961                          (curp->ifa_addr->sa_family != family))) ||
 962                          (curp->ifa_flags & IFF_LOOPBACK)) {
 963                         curp = curp->ifa_next;
 964                         continue;
 965                 }
 966                 if ((curp->ifa_addr->sa_family != AF_INET) &&
 967                         (curp->ifa_addr->sa_family != AF_INET6)) {
 968                         curp = curp->ifa_next;
 969                         continue;
 970                 }
 971
 972                 if (op == KVP_OP_GET_IP_INFO) {
 973                         /*
 974                          * Gather info other than the IP address.
 975                          * IP address info will be gathered later.
 976                          */
 977                         if (curp->ifa_addr->sa_family == AF_INET) {
 978                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
 979                                 /*
 980                                  * Get subnet info.
 981                                  */
 982                                 error = kvp_process_ip_address(
 983                                                              curp->ifa_netmask,
 984                                                              AF_INET,
 985                                                              (char *)
 986                                                              ip_buffer->sub_net,
 987                                                              length,
 988                                                              &sn_offset);
 989                                 if (error)
 990                                         goto gather_ipaddr;
 991                         } else {
 992                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
 993
 994                                 /*
 995                                  * Get subnet info in CIDR format.
 996                                  */
 997                                 weight = 0;
 998                                 sn_str = (char *)ip_buffer->sub_net;
 999                                 addr6 = (struct sockaddr_in6 *)
1000                                         curp->ifa_netmask;
1001                                 w = addr6->sin6_addr.s6_addr32;
1002
1003                                 for (i = 0; i < 4; i++)
1004                                         weight += hweight32(&w[i]);
1005
1006                                 sprintf(cidr_mask, "/%d", weight);
1007                                 if (length < sn_offset + strlen(cidr_mask) + 1)
1008                                         goto gather_ipaddr;
1009
1010                                 if (sn_offset == 0)
1011                                         strcpy(sn_str, cidr_mask);
1012                                 else {
1013                                         strcat((char *)ip_buffer->sub_net, ";");
1014                                         strcat(sn_str, cidr_mask);
1015                                 }
1016                                 sn_offset += strlen(sn_str) + 1;
1017                         }
1018
1019                         /*
1020                          * Collect other ip related configuration info.
1021                          */
1022
1023                         kvp_get_ipconfig_info(if_name, ip_buffer);
1024                 }
1025
1026 gather_ipaddr:
1027                 error = kvp_process_ip_address(curp->ifa_addr,
1028                                                 curp->ifa_addr->sa_family,
1029                                                 buffer,
1030                                                 length, &offset);
1031                 if (error)
1032                         goto getaddr_done;
1033
1034                 curp = curp->ifa_next;
1035         }
1036
1037 getaddr_done:
1038         freeifaddrs(ifap);
1039         return error;
1040 }
1041
1042
1043 static int expand_ipv6(char *addr, int type)
1044 {
1045         int ret;
1046         struct in6_addr v6_addr;
1047
1048         ret = inet_pton(AF_INET6, addr, &v6_addr);
1049
1050         if (ret != 1) {
1051                 if (type == NETMASK)
1052                         return 1;
1053                 return 0;
1054         }
1055
1056         sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1057                 "%02x%02x:%02x%02x:%02x%02x",
1058                 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1059                 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1060                 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1061                 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1062                 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1063                 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1064                 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1065                 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1066
1067         return 1;
1068
1069 }
1070
1071 static int is_ipv4(char *addr)
1072 {
1073         int ret;
1074         struct in_addr ipv4_addr;
1075
1076         ret = inet_pton(AF_INET, addr, &ipv4_addr);
1077
1078         if (ret == 1)
1079                 return 1;
1080         return 0;
1081 }
1082
1083 static int parse_ip_val_buffer(char *in_buf, int *offset,
1084                                 char *out_buf, int out_len)
1085 {
1086         char *x;
1087         char *start;
1088
1089         /*
1090          * in_buf has sequence of characters that are seperated by
1091          * the character ';'. The last sequence does not have the
1092          * terminating ";" character.
1093          */
1094         start = in_buf + *offset;
1095
1096         x = strchr(start, ';');
1097         if (x)
1098                 *x = 0;
1099         else
1100                 x = start + strlen(start);
1101
1102         if (strlen(start) != 0) {
1103                 int i = 0;
1104                 /*
1105                  * Get rid of leading spaces.
1106                  */
1107                 while (start[i] == ' ')
1108                         i++;
1109
1110                 if ((x - start) <= out_len) {
1111                         strcpy(out_buf, (start + i));
1112                         *offset += (x - start) + 1;
1113                         return 1;
1114                 }
1115         }
1116         return 0;
1117 }
1118
1119 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1120 {
1121         int ret;
1122
1123         ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1124
1125         if (ret < 0)
1126                 return HV_E_FAIL;
1127
1128         return 0;
1129 }
1130
1131
1132 static int process_ip_string(FILE *f, char *ip_string, int type)
1133 {
1134         int error = 0;
1135         char addr[INET6_ADDRSTRLEN];
1136         int i = 0;
1137         int j = 0;
1138         char str[256];
1139         char sub_str[13];
1140         int offset = 0;
1141
1142         memset(addr, 0, sizeof(addr));
1143
1144         while (parse_ip_val_buffer(ip_string, &offset, addr,
1145                                         (MAX_IP_ADDR_SIZE * 2))) {
1146
1147                 sub_str[0] = 0;
1148                 if (is_ipv4(addr)) {
1149                         switch (type) {
1150                         case IPADDR:
1151                                 snprintf(str, sizeof(str), "%s", "IPADDR");
1152                                 break;
1153                         case NETMASK:
1154                                 snprintf(str, sizeof(str), "%s", "NETMASK");
1155                                 break;
1156                         case GATEWAY:
1157                                 snprintf(str, sizeof(str), "%s", "GATEWAY");
1158                                 break;
1159                         case DNS:
1160                                 snprintf(str, sizeof(str), "%s", "DNS");
1161                                 break;
1162                         }
1163
1164                         if (type == DNS) {
1165                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1166                         } else if (type == GATEWAY && i == 0) {
1167                                 ++i;
1168                         } else {
1169                                 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1170                         }
1171
1172
1173                 } else if (expand_ipv6(addr, type)) {
1174                         switch (type) {
1175                         case IPADDR:
1176                                 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1177                                 break;
1178                         case NETMASK:
1179                                 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1180                                 break;
1181                         case GATEWAY:
1182                                 snprintf(str, sizeof(str), "%s",
1183                                         "IPV6_DEFAULTGW");
1184                                 break;
1185                         case DNS:
1186                                 snprintf(str, sizeof(str), "%s",  "DNS");
1187                                 break;
1188                         }
1189
1190                         if (type == DNS) {
1191                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1192                         } else if (j == 0) {
1193                                 ++j;
1194                         } else {
1195                                 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1196                         }
1197                 } else {
1198                         return  HV_INVALIDARG;
1199                 }
1200
1201                 error = kvp_write_file(f, str, sub_str, addr);
1202                 if (error)
1203                         return error;
1204                 memset(addr, 0, sizeof(addr));
1205         }
1206
1207         return 0;
1208 }
1209
1210 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1211 {
1212         int error = 0;
1213         char if_file[PATH_MAX];
1214         FILE *file;
1215         char cmd[PATH_MAX];
1216         char *mac_addr;
1217
1218         /*
1219          * Set the configuration for the specified interface with
1220          * the information provided. Since there is no standard
1221          * way to configure an interface, we will have an external
1222          * script that does the job of configuring the interface and
1223          * flushing the configuration.
1224          *
1225          * The parameters passed to this external script are:
1226          * 1. A configuration file that has the specified configuration.
1227          *
1228          * We will embed the name of the interface in the configuration
1229          * file: ifcfg-ethx (where ethx is the interface name).
1230          *
1231          * The information provided here may be more than what is needed
1232          * in a given distro to configure the interface and so are free
1233          * ignore information that may not be relevant.
1234          *
1235          * Here is the format of the ip configuration file:
1236          *
1237          * HWADDR=macaddr
1238          * DEVICE=interface name
1239          * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1240          *                       or "none" if no boot-time protocol should be used)
1241          *
1242          * IPADDR0=ipaddr1
1243          * IPADDR1=ipaddr2
1244          * IPADDRx=ipaddry (where y = x + 1)
1245          *
1246          * NETMASK0=netmask1
1247          * NETMASKx=netmasky (where y = x + 1)
1248          *
1249          * GATEWAY=ipaddr1
1250          * GATEWAYx=ipaddry (where y = x + 1)
1251          *
1252          * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1253          *
1254          * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1255          * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1256          * IPV6NETMASK.
1257          *
1258          * The host can specify multiple ipv4 and ipv6 addresses to be
1259          * configured for the interface. Furthermore, the configuration
1260          * needs to be persistent. A subsequent GET call on the interface
1261          * is expected to return the configuration that is set via the SET
1262          * call.
1263          */
1264
1265         snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1266                 "/ifcfg-", if_name);
1267
1268         file = fopen(if_file, "w");
1269
1270         if (file == NULL) {
1271                 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1272                                 errno, strerror(errno));
1273                 return HV_E_FAIL;
1274         }
1275
1276         /*
1277          * First write out the MAC address.
1278          */
1279
1280         mac_addr = kvp_if_name_to_mac(if_name);
1281         if (mac_addr == NULL) {
1282                 error = HV_E_FAIL;
1283                 goto setval_error;
1284         }
1285
1286         error = kvp_write_file(file, "HWADDR", "", mac_addr);
1287         free(mac_addr);
1288         if (error)
1289                 goto setval_error;
1290
1291         error = kvp_write_file(file, "DEVICE", "", if_name);
1292         if (error)
1293                 goto setval_error;
1294
1295         /*
1296          * The dhcp_enabled flag is only for IPv4. In the case the host only
1297          * injects an IPv6 address, the flag is true, but we still need to
1298          * proceed to parse and pass the IPv6 information to the
1299          * disto-specific script hv_set_ifconfig.
1300          */
1301         if (new_val->dhcp_enabled) {
1302                 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1303                 if (error)
1304                         goto setval_error;
1305
1306         } else {
1307                 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1308                 if (error)
1309                         goto setval_error;
1310         }
1311
1312         /*
1313          * Write the configuration for ipaddress, netmask, gateway and
1314          * name servers.
1315          */
1316
1317         error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1318         if (error)
1319                 goto setval_error;
1320
1321         error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1322         if (error)
1323                 goto setval_error;
1324
1325         error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1326         if (error)
1327                 goto setval_error;
1328
1329         error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1330         if (error)
1331                 goto setval_error;
1332
1333         fclose(file);
1334
1335         /*
1336          * Now that we have populated the configuration file,
1337          * invoke the external script to do its magic.
1338          */
1339
1340         snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s",
1341                  "hv_set_ifconfig", if_file);
1342         if (system(cmd)) {
1343                 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1344                                 cmd, errno, strerror(errno));
1345                 return HV_E_FAIL;
1346         }
1347         return 0;
1348
1349 setval_error:
1350         syslog(LOG_ERR, "Failed to write config file");
1351         fclose(file);
1352         return error;
1353 }
1354
1355
1356 static void
1357 kvp_get_domain_name(char *buffer, int length)
1358 {
1359         struct addrinfo hints, *info ;
1360         int error = 0;
1361
1362         gethostname(buffer, length);
1363         memset(&hints, 0, sizeof(hints));
1364         hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1365         hints.ai_socktype = SOCK_STREAM;
1366         hints.ai_flags = AI_CANONNAME;
1367
1368         error = getaddrinfo(buffer, NULL, &hints, &info);
1369         if (error != 0) {
1370                 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1371                         error, gai_strerror(error));
1372                 return;
1373         }
1374         snprintf(buffer, length, "%s", info->ai_canonname);
1375         freeaddrinfo(info);
1376 }
1377
1378 void print_usage(char *argv[])
1379 {
1380         fprintf(stderr, "Usage: %s [options]\n"
1381                 "Options are:\n"
1382                 "  -n, --no-daemon        stay in foreground, don't daemonize\n"
1383                 "  -h, --help             print this help\n", argv[0]);
1384 }
1385
1386 int main(int argc, char *argv[])
1387 {
1388         int kvp_fd, len;
1389         int error;
1390         struct pollfd pfd;
1391         char    *p;
1392         struct hv_kvp_msg hv_msg[1];
1393         char    *key_value;
1394         char    *key_name;
1395         int     op;
1396         int     pool;
1397         char    *if_name;
1398         struct hv_kvp_ipaddr_value *kvp_ip_val;
1399         int daemonize = 1, long_index = 0, opt;
1400
1401         static struct option long_options[] = {
1402                 {"help",        no_argument,       0,  'h' },
1403                 {"no-daemon",   no_argument,       0,  'n' },
1404                 {0,             0,                 0,  0   }
1405         };
1406
1407         while ((opt = getopt_long(argc, argv, "hn", long_options,
1408                                   &long_index)) != -1) {
1409                 switch (opt) {
1410                 case 'n':
1411                         daemonize = 0;
1412                         break;
1413                 case 'h':
1414                 default:
1415                         print_usage(argv);
1416                         exit(EXIT_FAILURE);
1417                 }
1418         }
1419
1420         if (daemonize && daemon(1, 0))
1421                 return 1;
1422
1423         openlog("KVP", 0, LOG_USER);
1424         syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1425
1426         kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC);
1427
1428         if (kvp_fd < 0) {
1429                 syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s",
1430                         errno, strerror(errno));
1431                 exit(EXIT_FAILURE);
1432         }
1433
1434         /*
1435          * Retrieve OS release information.
1436          */
1437         kvp_get_os_info();
1438         /*
1439          * Cache Fully Qualified Domain Name because getaddrinfo takes an
1440          * unpredictable amount of time to finish.
1441          */
1442         kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
1443
1444         if (kvp_file_init()) {
1445                 syslog(LOG_ERR, "Failed to initialize the pools");
1446                 exit(EXIT_FAILURE);
1447         }
1448
1449         /*
1450          * Register ourselves with the kernel.
1451          */
1452         hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1453         len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1454         if (len != sizeof(struct hv_kvp_msg)) {
1455                 syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
1456                        errno, strerror(errno));
1457                 close(kvp_fd);
1458                 exit(EXIT_FAILURE);
1459         }
1460
1461         pfd.fd = kvp_fd;
1462
1463         while (1) {
1464                 pfd.events = POLLIN;
1465                 pfd.revents = 0;
1466
1467                 if (poll(&pfd, 1, -1) < 0) {
1468                         syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1469                         if (errno == EINVAL) {
1470                                 close(kvp_fd);
1471                                 exit(EXIT_FAILURE);
1472                         }
1473                         else
1474                                 continue;
1475                 }
1476
1477                 len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1478
1479                 if (len != sizeof(struct hv_kvp_msg)) {
1480                         syslog(LOG_ERR, "read failed; error:%d %s",
1481                                errno, strerror(errno));
1482
1483                         close(kvp_fd);
1484                         return EXIT_FAILURE;
1485                 }
1486
1487                 /*
1488                  * We will use the KVP header information to pass back
1489                  * the error from this daemon. So, first copy the state
1490                  * and set the error code to success.
1491                  */
1492                 op = hv_msg->kvp_hdr.operation;
1493                 pool = hv_msg->kvp_hdr.pool;
1494                 hv_msg->error = HV_S_OK;
1495
1496                 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1497                         /*
1498                          * Driver is registering with us; stash away the version
1499                          * information.
1500                          */
1501                         in_hand_shake = 0;
1502                         p = (char *)hv_msg->body.kvp_register.version;
1503                         lic_version = malloc(strlen(p) + 1);
1504                         if (lic_version) {
1505                                 strcpy(lic_version, p);
1506                                 syslog(LOG_INFO, "KVP LIC Version: %s",
1507                                        lic_version);
1508                         } else {
1509                                 syslog(LOG_ERR, "malloc failed");
1510                         }
1511                         continue;
1512                 }
1513
1514                 switch (op) {
1515                 case KVP_OP_GET_IP_INFO:
1516                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1517                         if_name =
1518                         kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1519
1520                         if (if_name == NULL) {
1521                                 /*
1522                                  * We could not map the mac address to an
1523                                  * interface name; return error.
1524                                  */
1525                                 hv_msg->error = HV_E_FAIL;
1526                                 break;
1527                         }
1528                         error = kvp_get_ip_info(
1529                                                 0, if_name, KVP_OP_GET_IP_INFO,
1530                                                 kvp_ip_val,
1531                                                 (MAX_IP_ADDR_SIZE * 2));
1532
1533                         if (error)
1534                                 hv_msg->error = error;
1535
1536                         free(if_name);
1537                         break;
1538
1539                 case KVP_OP_SET_IP_INFO:
1540                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1541                         if_name = kvp_get_if_name(
1542                                         (char *)kvp_ip_val->adapter_id);
1543                         if (if_name == NULL) {
1544                                 /*
1545                                  * We could not map the guid to an
1546                                  * interface name; return error.
1547                                  */
1548                                 hv_msg->error = HV_GUID_NOTFOUND;
1549                                 break;
1550                         }
1551                         error = kvp_set_ip_info(if_name, kvp_ip_val);
1552                         if (error)
1553                                 hv_msg->error = error;
1554
1555                         free(if_name);
1556                         break;
1557
1558                 case KVP_OP_SET:
1559                         if (kvp_key_add_or_modify(pool,
1560                                         hv_msg->body.kvp_set.data.key,
1561                                         hv_msg->body.kvp_set.data.key_size,
1562                                         hv_msg->body.kvp_set.data.value,
1563                                         hv_msg->body.kvp_set.data.value_size))
1564                                         hv_msg->error = HV_S_CONT;
1565                         break;
1566
1567                 case KVP_OP_GET:
1568                         if (kvp_get_value(pool,
1569                                         hv_msg->body.kvp_set.data.key,
1570                                         hv_msg->body.kvp_set.data.key_size,
1571                                         hv_msg->body.kvp_set.data.value,
1572                                         hv_msg->body.kvp_set.data.value_size))
1573                                         hv_msg->error = HV_S_CONT;
1574                         break;
1575
1576                 case KVP_OP_DELETE:
1577                         if (kvp_key_delete(pool,
1578                                         hv_msg->body.kvp_delete.key,
1579                                         hv_msg->body.kvp_delete.key_size))
1580                                         hv_msg->error = HV_S_CONT;
1581                         break;
1582
1583                 default:
1584                         break;
1585                 }
1586
1587                 if (op != KVP_OP_ENUMERATE)
1588                         goto kvp_done;
1589
1590                 /*
1591                  * If the pool is KVP_POOL_AUTO, dynamically generate
1592                  * both the key and the value; if not read from the
1593                  * appropriate pool.
1594                  */
1595                 if (pool != KVP_POOL_AUTO) {
1596                         if (kvp_pool_enumerate(pool,
1597                                         hv_msg->body.kvp_enum_data.index,
1598                                         hv_msg->body.kvp_enum_data.data.key,
1599                                         HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1600                                         hv_msg->body.kvp_enum_data.data.value,
1601                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1602                                         hv_msg->error = HV_S_CONT;
1603                         goto kvp_done;
1604                 }
1605
1606                 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1607                 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1608
1609                 switch (hv_msg->body.kvp_enum_data.index) {
1610                 case FullyQualifiedDomainName:
1611                         strcpy(key_value, full_domain_name);
1612                         strcpy(key_name, "FullyQualifiedDomainName");
1613                         break;
1614                 case IntegrationServicesVersion:
1615                         strcpy(key_name, "IntegrationServicesVersion");
1616                         strcpy(key_value, lic_version);
1617                         break;
1618                 case NetworkAddressIPv4:
1619                         kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1620                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1621                         strcpy(key_name, "NetworkAddressIPv4");
1622                         break;
1623                 case NetworkAddressIPv6:
1624                         kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1625                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1626                         strcpy(key_name, "NetworkAddressIPv6");
1627                         break;
1628                 case OSBuildNumber:
1629                         strcpy(key_value, os_build);
1630                         strcpy(key_name, "OSBuildNumber");
1631                         break;
1632                 case OSName:
1633                         strcpy(key_value, os_name);
1634                         strcpy(key_name, "OSName");
1635                         break;
1636                 case OSMajorVersion:
1637                         strcpy(key_value, os_major);
1638                         strcpy(key_name, "OSMajorVersion");
1639                         break;
1640                 case OSMinorVersion:
1641                         strcpy(key_value, os_minor);
1642                         strcpy(key_name, "OSMinorVersion");
1643                         break;
1644                 case OSVersion:
1645                         strcpy(key_value, os_version);
1646                         strcpy(key_name, "OSVersion");
1647                         break;
1648                 case ProcessorArchitecture:
1649                         strcpy(key_value, processor_arch);
1650                         strcpy(key_name, "ProcessorArchitecture");
1651                         break;
1652                 default:
1653                         hv_msg->error = HV_S_CONT;
1654                         break;
1655                 }
1656
1657                 /* Send the value back to the kernel. */
1658 kvp_done:
1659                 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1660                 if (len != sizeof(struct hv_kvp_msg)) {
1661                         syslog(LOG_ERR, "write failed; error: %d %s", errno,
1662                                strerror(errno));
1663                         exit(EXIT_FAILURE);
1664                 }
1665         }
1666
1667         close(kvp_fd);
1668         exit(0);
1669 }