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 <getopt.h>
  43
  44 /*
  45  * KVP protocol: The user mode component first registers with the
  46  * the kernel component. Subsequently, the kernel component requests, data
  47  * for the specified keys. In response to this message the user mode component
  48  * fills in the value corresponding to the specified key. We overload the
  49  * sequence field in the cn_msg header to define our KVP message types.
  50  *
  51  * We use this infrastructure for also supporting queries from user mode
  52  * application for state that may be maintained in the KVP kernel component.
  53  *
  54  */
  55
  56
  57 enum key_index {
  58         FullyQualifiedDomainName = 0,
  59         IntegrationServicesVersion, /*This key is serviced in the kernel*/
  60         NetworkAddressIPv4,
  61         NetworkAddressIPv6,
  62         OSBuildNumber,
  63         OSName,
  64         OSMajorVersion,
  65         OSMinorVersion,
  66         OSVersion,
  67         ProcessorArchitecture
  68 };
  69
  70
  71 enum {
  72         IPADDR = 0,
  73         NETMASK,
  74         GATEWAY,
  75         DNS
  76 };
  77
  78 static int in_hand_shake = 1;
  79
  80 static char *os_name = "";
  81 static char *os_major = "";
  82 static char *os_minor = "";
  83 static char *processor_arch;
  84 static char *os_build;
  85 static char *os_version;
  86 static char *lic_version = "Unknown version";
  87 static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
  88 static struct utsname uts_buf;
  89
  90 /*
  91  * The location of the interface configuration file.
  92  */
  93
  94 #define KVP_CONFIG_LOC  "/var/lib/hyperv"
  95
  96 #ifndef KVP_SCRIPTS_PATH
  97 #define KVP_SCRIPTS_PATH "/usr/libexec/hypervkvpd/"
  98 #endif
  99
 100 #define MAX_FILE_NAME 100
 101 #define ENTRIES_PER_BLOCK 50
 102
 103 struct kvp_record {
 104         char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
 105         char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
 106 };
 107
 108 struct kvp_file_state {
 109         int fd;
 110         int num_blocks;
 111         struct kvp_record *records;
 112         int num_records;
 113         char fname[MAX_FILE_NAME];
 114 };
 115
 116 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
 117
 118 static void kvp_acquire_lock(int pool)
 119 {
 120         struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
 121         fl.l_pid = getpid();
 122
 123         if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
 124                 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
 125                                 errno, strerror(errno));
 126                 exit(EXIT_FAILURE);
 127         }
 128 }
 129
 130 static void kvp_release_lock(int pool)
 131 {
 132         struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
 133         fl.l_pid = getpid();
 134
 135         if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
 136                 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
 137                                 errno, strerror(errno));
 138                 exit(EXIT_FAILURE);
 139         }
 140 }
 141
 142 static void kvp_update_file(int pool)
 143 {
 144         FILE *filep;
 145
 146         /*
 147          * We are going to write our in-memory registry out to
 148          * disk; acquire the lock first.
 149          */
 150         kvp_acquire_lock(pool);
 151
 152         filep = fopen(kvp_file_info[pool].fname, "we");
 153         if (!filep) {
 154                 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
 155                                 errno, strerror(errno));
 156                 kvp_release_lock(pool);
 157                 exit(EXIT_FAILURE);
 158         }
 159
 160         fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record),
 161                                 kvp_file_info[pool].num_records, filep);
 162
 163         if (ferror(filep) || fclose(filep)) {
 164                 kvp_release_lock(pool);
 165                 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
 166                 exit(EXIT_FAILURE);
 167         }
 168
 169         kvp_release_lock(pool);
 170 }
 171
 172 static void kvp_update_mem_state(int pool)
 173 {
 174         FILE *filep;
 175         size_t records_read = 0;
 176         struct kvp_record *record = kvp_file_info[pool].records;
 177         struct kvp_record *readp;
 178         int num_blocks = kvp_file_info[pool].num_blocks;
 179         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
 180
 181         kvp_acquire_lock(pool);
 182
 183         filep = fopen(kvp_file_info[pool].fname, "re");
 184         if (!filep) {
 185                 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
 186                                 errno, strerror(errno));
 187                 kvp_release_lock(pool);
 188                 exit(EXIT_FAILURE);
 189         }
 190         for (;;) {
 191                 readp = &record[records_read];
 192                 records_read += fread(readp, sizeof(struct kvp_record),
 193                                         ENTRIES_PER_BLOCK * num_blocks,
 194                                         filep);
 195
 196                 if (ferror(filep)) {
 197                         syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
 198                         exit(EXIT_FAILURE);
 199                 }
 200
 201                 if (!feof(filep)) {
 202                         /*
 203                          * We have more data to read.
 204                          */
 205                         num_blocks++;
 206                         record = realloc(record, alloc_unit * num_blocks);
 207
 208                         if (record == NULL) {
 209                                 syslog(LOG_ERR, "malloc failed");
 210                                 exit(EXIT_FAILURE);
 211                         }
 212                         continue;
 213                 }
 214                 break;
 215         }
 216
 217         kvp_file_info[pool].num_blocks = num_blocks;
 218         kvp_file_info[pool].records = record;
 219         kvp_file_info[pool].num_records = records_read;
 220
 221         fclose(filep);
 222         kvp_release_lock(pool);
 223 }
 224 static int kvp_file_init(void)
 225 {
 226         int  fd;
 227         FILE *filep;
 228         size_t records_read;
 229         char *fname;
 230         struct kvp_record *record;
 231         struct kvp_record *readp;
 232         int num_blocks;
 233         int i;
 234         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
 235
 236         if (access(KVP_CONFIG_LOC, F_OK)) {
 237                 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
 238                         syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
 239                                         errno, strerror(errno));
 240                         exit(EXIT_FAILURE);
 241                 }
 242         }
 243
 244         for (i = 0; i < KVP_POOL_COUNT; i++) {
 245                 fname = kvp_file_info[i].fname;
 246                 records_read = 0;
 247                 num_blocks = 1;
 248                 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
 249                 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
 250
 251                 if (fd == -1)
 252                         return 1;
 253
 254
 255                 filep = fopen(fname, "re");
 256                 if (!filep) {
 257                         close(fd);
 258                         return 1;
 259                 }
 260
 261                 record = malloc(alloc_unit * num_blocks);
 262                 if (record == NULL) {
 263                         fclose(filep);
 264                         close(fd);
 265                         return 1;
 266                 }
 267                 for (;;) {
 268                         readp = &record[records_read];
 269                         records_read += fread(readp, sizeof(struct kvp_record),
 270                                         ENTRIES_PER_BLOCK,
 271                                         filep);
 272
 273                         if (ferror(filep)) {
 274                                 syslog(LOG_ERR, "Failed to read file, pool: %d",
 275                                        i);
 276                                 exit(EXIT_FAILURE);
 277                         }
 278
 279                         if (!feof(filep)) {
 280                                 /*
 281                                  * We have more data to read.
 282                                  */
 283                                 num_blocks++;
 284                                 record = realloc(record, alloc_unit *
 285                                                 num_blocks);
 286                                 if (record == NULL) {
 287                                         fclose(filep);
 288                                         close(fd);
 289                                         return 1;
 290                                 }
 291                                 continue;
 292                         }
 293                         break;
 294                 }
 295                 kvp_file_info[i].fd = fd;
 296                 kvp_file_info[i].num_blocks = num_blocks;
 297                 kvp_file_info[i].records = record;
 298                 kvp_file_info[i].num_records = records_read;
 299                 fclose(filep);
 300
 301         }
 302
 303         return 0;
 304 }
 305
 306 static int kvp_key_delete(int pool, const __u8 *key, int key_size)
 307 {
 308         int i;
 309         int j, k;
 310         int num_records;
 311         struct kvp_record *record;
 312
 313         /*
 314          * First update the in-memory state.
 315          */
 316         kvp_update_mem_state(pool);
 317
 318         num_records = kvp_file_info[pool].num_records;
 319         record = kvp_file_info[pool].records;
 320
 321         for (i = 0; i < num_records; i++) {
 322                 if (memcmp(key, record[i].key, key_size))
 323                         continue;
 324                 /*
 325                  * Found a match; just move the remaining
 326                  * entries up.
 327                  */
 328                 if (i == num_records) {
 329                         kvp_file_info[pool].num_records--;
 330                         kvp_update_file(pool);
 331                         return 0;
 332                 }
 333
 334                 j = i;
 335                 k = j + 1;
 336                 for (; k < num_records; k++) {
 337                         strcpy(record[j].key, record[k].key);
 338                         strcpy(record[j].value, record[k].value);
 339                         j++;
 340                 }
 341
 342                 kvp_file_info[pool].num_records--;
 343                 kvp_update_file(pool);
 344                 return 0;
 345         }
 346         return 1;
 347 }
 348
 349 static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size,
 350                                  const __u8 *value, int value_size)
 351 {
 352         int i;
 353         int num_records;
 354         struct kvp_record *record;
 355         int num_blocks;
 356
 357         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
 358                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
 359                 return 1;
 360
 361         /*
 362          * First update the in-memory state.
 363          */
 364         kvp_update_mem_state(pool);
 365
 366         num_records = kvp_file_info[pool].num_records;
 367         record = kvp_file_info[pool].records;
 368         num_blocks = kvp_file_info[pool].num_blocks;
 369
 370         for (i = 0; i < num_records; i++) {
 371                 if (memcmp(key, record[i].key, key_size))
 372                         continue;
 373                 /*
 374                  * Found a match; just update the value -
 375                  * this is the modify case.
 376                  */
 377                 memcpy(record[i].value, value, value_size);
 378                 kvp_update_file(pool);
 379                 return 0;
 380         }
 381
 382         /*
 383          * Need to add a new entry;
 384          */
 385         if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
 386                 /* Need to allocate a larger array for reg entries. */
 387                 record = realloc(record, sizeof(struct kvp_record) *
 388                          ENTRIES_PER_BLOCK * (num_blocks + 1));
 389
 390                 if (record == NULL)
 391                         return 1;
 392                 kvp_file_info[pool].num_blocks++;
 393
 394         }
 395         memcpy(record[i].value, value, value_size);
 396         memcpy(record[i].key, key, key_size);
 397         kvp_file_info[pool].records = record;
 398         kvp_file_info[pool].num_records++;
 399         kvp_update_file(pool);
 400         return 0;
 401 }
 402
 403 static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value,
 404                         int value_size)
 405 {
 406         int i;
 407         int num_records;
 408         struct kvp_record *record;
 409
 410         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
 411                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
 412                 return 1;
 413
 414         /*
 415          * First update the in-memory state.
 416          */
 417         kvp_update_mem_state(pool);
 418
 419         num_records = kvp_file_info[pool].num_records;
 420         record = kvp_file_info[pool].records;
 421
 422         for (i = 0; i < num_records; i++) {
 423                 if (memcmp(key, record[i].key, key_size))
 424                         continue;
 425                 /*
 426                  * Found a match; just copy the value out.
 427                  */
 428                 memcpy(value, record[i].value, value_size);
 429                 return 0;
 430         }
 431
 432         return 1;
 433 }
 434
 435 static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
 436                                 __u8 *value, int value_size)
 437 {
 438         struct kvp_record *record;
 439
 440         /*
 441          * First update our in-memory database.
 442          */
 443         kvp_update_mem_state(pool);
 444         record = kvp_file_info[pool].records;
 445
 446         if (index >= kvp_file_info[pool].num_records) {
 447                 return 1;
 448         }
 449
 450         memcpy(key, record[index].key, key_size);
 451         memcpy(value, record[index].value, value_size);
 452         return 0;
 453 }
 454
 455
 456 void kvp_get_os_info(void)
 457 {
 458         FILE    *file;
 459         char    *p, buf[512];
 460
 461         uname(&uts_buf);
 462         os_version = uts_buf.release;
 463         os_build = strdup(uts_buf.release);
 464
 465         os_name = uts_buf.sysname;
 466         processor_arch = uts_buf.machine;
 467
 468         /*
 469          * The current windows host (win7) expects the build
 470          * string to be of the form: x.y.z
 471          * Strip additional information we may have.
 472          */
 473         p = strchr(os_version, '-');
 474         if (p)
 475                 *p = '\0';
 476
 477         /*
 478          * Parse the /etc/os-release file if present:
 479          * http://www.freedesktop.org/software/systemd/man/os-release.html
 480          */
 481         file = fopen("/etc/os-release", "r");
 482         if (file != NULL) {
 483                 while (fgets(buf, sizeof(buf), file)) {
 484                         char *value, *q;
 485
 486                         /* Ignore comments */
 487                         if (buf[0] == '#')
 488                                 continue;
 489
 490                         /* Split into name=value */
 491                         p = strchr(buf, '=');
 492                         if (!p)
 493                                 continue;
 494                         *p++ = 0;
 495
 496                         /* Remove quotes and newline; un-escape */
 497                         value = p;
 498                         q = p;
 499                         while (*p) {
 500                                 if (*p == '\\') {
 501                                         ++p;
 502                                         if (!*p)
 503                                                 break;
 504                                         *q++ = *p++;
 505                                 } else if (*p == '\'' || *p == '"' ||
 506                                            *p == '\n') {
 507                                         ++p;
 508                                 } else {
 509                                         *q++ = *p++;
 510                                 }
 511                         }
 512                         *q = 0;
 513
 514                         if (!strcmp(buf, "NAME")) {
 515                                 p = strdup(value);
 516                                 if (!p)
 517                                         break;
 518                                 os_name = p;
 519                         } else if (!strcmp(buf, "VERSION_ID")) {
 520                                 p = strdup(value);
 521                                 if (!p)
 522                                         break;
 523                                 os_major = p;
 524                         }
 525                 }
 526                 fclose(file);
 527                 return;
 528         }
 529
 530         /* Fallback for older RH/SUSE releases */
 531         file = fopen("/etc/SuSE-release", "r");
 532         if (file != NULL)
 533                 goto kvp_osinfo_found;
 534         file  = fopen("/etc/redhat-release", "r");
 535         if (file != NULL)
 536                 goto kvp_osinfo_found;
 537
 538         /*
 539          * We don't have information about the os.
 540          */
 541         return;
 542
 543 kvp_osinfo_found:
 544         /* up to three lines */
 545         p = fgets(buf, sizeof(buf), file);
 546         if (p) {
 547                 p = strchr(buf, '\n');
 548                 if (p)
 549                         *p = '\0';
 550                 p = strdup(buf);
 551                 if (!p)
 552                         goto done;
 553                 os_name = p;
 554
 555                 /* second line */
 556                 p = fgets(buf, sizeof(buf), file);
 557                 if (p) {
 558                         p = strchr(buf, '\n');
 559                         if (p)
 560                                 *p = '\0';
 561                         p = strdup(buf);
 562                         if (!p)
 563                                 goto done;
 564                         os_major = p;
 565
 566                         /* third line */
 567                         p = fgets(buf, sizeof(buf), file);
 568                         if (p)  {
 569                                 p = strchr(buf, '\n');
 570                                 if (p)
 571                                         *p = '\0';
 572                                 p = strdup(buf);
 573                                 if (p)
 574                                         os_minor = p;
 575                         }
 576                 }
 577         }
 578
 579 done:
 580         fclose(file);
 581         return;
 582 }
 583
 584
 585
 586 /*
 587  * Retrieve an interface name corresponding to the specified guid.
 588  * If there is a match, the function returns a pointer
 589  * to the interface name and if not, a NULL is returned.
 590  * If a match is found, the caller is responsible for
 591  * freeing the memory.
 592  */
 593
 594 static char *kvp_get_if_name(char *guid)
 595 {
 596         DIR *dir;
 597         struct dirent *entry;
 598         FILE    *file;
 599         char    *p, *q, *x;
 600         char    *if_name = NULL;
 601         char    buf[256];
 602         char *kvp_net_dir = "/sys/class/net/";
 603         char dev_id[256];
 604
 605         dir = opendir(kvp_net_dir);
 606         if (dir == NULL)
 607                 return NULL;
 608
 609         snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
 610         q = dev_id + strlen(kvp_net_dir);
 611
 612         while ((entry = readdir(dir)) != NULL) {
 613                 /*
 614                  * Set the state for the next pass.
 615                  */
 616                 *q = '\0';
 617                 strcat(dev_id, entry->d_name);
 618                 strcat(dev_id, "/device/device_id");
 619
 620                 file = fopen(dev_id, "r");
 621                 if (file == NULL)
 622                         continue;
 623
 624                 p = fgets(buf, sizeof(buf), file);
 625                 if (p) {
 626                         x = strchr(p, '\n');
 627                         if (x)
 628                                 *x = '\0';
 629
 630                         if (!strcmp(p, guid)) {
 631                                 /*
 632                                  * Found the guid match; return the interface
 633                                  * name. The caller will free the memory.
 634                                  */
 635                                 if_name = strdup(entry->d_name);
 636                                 fclose(file);
 637                                 break;
 638                         }
 639                 }
 640                 fclose(file);
 641         }
 642
 643         closedir(dir);
 644         return if_name;
 645 }
 646
 647 /*
 648  * Retrieve the MAC address given the interface name.
 649  */
 650
 651 static char *kvp_if_name_to_mac(char *if_name)
 652 {
 653         FILE    *file;
 654         char    *p, *x;
 655         char    buf[256];
 656         char addr_file[256];
 657         unsigned int i;
 658         char *mac_addr = NULL;
 659
 660         snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
 661                 if_name, "/address");
 662
 663         file = fopen(addr_file, "r");
 664         if (file == NULL)
 665                 return NULL;
 666
 667         p = fgets(buf, sizeof(buf), file);
 668         if (p) {
 669                 x = strchr(p, '\n');
 670                 if (x)
 671                         *x = '\0';
 672                 for (i = 0; i < strlen(p); i++)
 673                         p[i] = toupper(p[i]);
 674                 mac_addr = strdup(p);
 675         }
 676
 677         fclose(file);
 678         return mac_addr;
 679 }
 680
 681
 682 /*
 683  * Retrieve the interface name given tha MAC address.
 684  */
 685
 686 static char *kvp_mac_to_if_name(char *mac)
 687 {
 688         DIR *dir;
 689         struct dirent *entry;
 690         FILE    *file;
 691         char    *p, *q, *x;
 692         char    *if_name = NULL;
 693         char    buf[256];
 694         char *kvp_net_dir = "/sys/class/net/";
 695         char dev_id[256];
 696         unsigned int i;
 697
 698         dir = opendir(kvp_net_dir);
 699         if (dir == NULL)
 700                 return NULL;
 701
 702         snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
 703         q = dev_id + strlen(kvp_net_dir);
 704
 705         while ((entry = readdir(dir)) != NULL) {
 706                 /*
 707                  * Set the state for the next pass.
 708                  */
 709                 *q = '\0';
 710
 711                 strcat(dev_id, entry->d_name);
 712                 strcat(dev_id, "/address");
 713
 714                 file = fopen(dev_id, "r");
 715                 if (file == NULL)
 716                         continue;
 717
 718                 p = fgets(buf, sizeof(buf), file);
 719                 if (p) {
 720                         x = strchr(p, '\n');
 721                         if (x)
 722                                 *x = '\0';
 723
 724                         for (i = 0; i < strlen(p); i++)
 725                                 p[i] = toupper(p[i]);
 726
 727                         if (!strcmp(p, mac)) {
 728                                 /*
 729                                  * Found the MAC match; return the interface
 730                                  * name. The caller will free the memory.
 731                                  */
 732                                 if_name = strdup(entry->d_name);
 733                                 fclose(file);
 734                                 break;
 735                         }
 736                 }
 737                 fclose(file);
 738         }
 739
 740         closedir(dir);
 741         return if_name;
 742 }
 743
 744
 745 static void kvp_process_ipconfig_file(char *cmd,
 746                                         char *config_buf, unsigned int len,
 747                                         int element_size, int offset)
 748 {
 749         char buf[256];
 750         char *p;
 751         char *x;
 752         FILE *file;
 753
 754         /*
 755          * First execute the command.
 756          */
 757         file = popen(cmd, "r");
 758         if (file == NULL)
 759                 return;
 760
 761         if (offset == 0)
 762                 memset(config_buf, 0, len);
 763         while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
 764                 if (len < strlen(config_buf) + element_size + 1)
 765                         break;
 766
 767                 x = strchr(p, '\n');
 768                 if (x)
 769                         *x = '\0';
 770
 771                 strcat(config_buf, p);
 772                 strcat(config_buf, ";");
 773         }
 774         pclose(file);
 775 }
 776
 777 static void kvp_get_ipconfig_info(char *if_name,
 778                                  struct hv_kvp_ipaddr_value *buffer)
 779 {
 780         char cmd[512];
 781         char dhcp_info[128];
 782         char *p;
 783         FILE *file;
 784
 785         /*
 786          * Get the address of default gateway (ipv4).
 787          */
 788         sprintf(cmd, "%s %s", "ip route show dev", if_name);
 789         strcat(cmd, " | awk '/default/ {print $3 }'");
 790
 791         /*
 792          * Execute the command to gather gateway info.
 793          */
 794         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
 795                                 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
 796
 797         /*
 798          * Get the address of default gateway (ipv6).
 799          */
 800         sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
 801         strcat(cmd, " | awk '/default/ {print $3 }'");
 802
 803         /*
 804          * Execute the command to gather gateway info (ipv6).
 805          */
 806         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
 807                                 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
 808
 809
 810         /*
 811          * Gather the DNS  state.
 812          * Since there is no standard way to get this information
 813          * across various distributions of interest; we just invoke
 814          * an external script that needs to be ported across distros
 815          * of interest.
 816          *
 817          * Following is the expected format of the information from the script:
 818          *
 819          * ipaddr1 (nameserver1)
 820          * ipaddr2 (nameserver2)
 821          * .
 822          * .
 823          */
 824
 825         sprintf(cmd, KVP_SCRIPTS_PATH "%s",  "hv_get_dns_info");
 826
 827         /*
 828          * Execute the command to gather DNS info.
 829          */
 830         kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
 831                                 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
 832
 833         /*
 834          * Gather the DHCP state.
 835          * We will gather this state by invoking an external script.
 836          * The parameter to the script is the interface name.
 837          * Here is the expected output:
 838          *
 839          * Enabled: DHCP enabled.
 840          */
 841
 842         sprintf(cmd, KVP_SCRIPTS_PATH "%s %s", "hv_get_dhcp_info", if_name);
 843
 844         file = popen(cmd, "r");
 845         if (file == NULL)
 846                 return;
 847
 848         p = fgets(dhcp_info, sizeof(dhcp_info), file);
 849         if (p == NULL) {
 850                 pclose(file);
 851                 return;
 852         }
 853
 854         if (!strncmp(p, "Enabled", 7))
 855                 buffer->dhcp_enabled = 1;
 856         else
 857                 buffer->dhcp_enabled = 0;
 858
 859         pclose(file);
 860 }
 861
 862
 863 static unsigned int hweight32(unsigned int *w)
 864 {
 865         unsigned int res = *w - ((*w >> 1) & 0x55555555);
 866         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
 867         res = (res + (res >> 4)) & 0x0F0F0F0F;
 868         res = res + (res >> 8);
 869         return (res + (res >> 16)) & 0x000000FF;
 870 }
 871
 872 static int kvp_process_ip_address(void *addrp,
 873                                 int family, char *buffer,
 874                                 int length,  int *offset)
 875 {
 876         struct sockaddr_in *addr;
 877         struct sockaddr_in6 *addr6;
 878         int addr_length;
 879         char tmp[50];
 880         const char *str;
 881
 882         if (family == AF_INET) {
 883                 addr = (struct sockaddr_in *)addrp;
 884                 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
 885                 addr_length = INET_ADDRSTRLEN;
 886         } else {
 887                 addr6 = (struct sockaddr_in6 *)addrp;
 888                 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
 889                 addr_length = INET6_ADDRSTRLEN;
 890         }
 891
 892         if ((length - *offset) < addr_length + 2)
 893                 return HV_E_FAIL;
 894         if (str == NULL) {
 895                 strcpy(buffer, "inet_ntop failed\n");
 896                 return HV_E_FAIL;
 897         }
 898         if (*offset == 0)
 899                 strcpy(buffer, tmp);
 900         else {
 901                 strcat(buffer, ";");
 902                 strcat(buffer, tmp);
 903         }
 904
 905         *offset += strlen(str) + 1;
 906
 907         return 0;
 908 }
 909
 910 static int
 911 kvp_get_ip_info(int family, char *if_name, int op,
 912                  void  *out_buffer, unsigned int length)
 913 {
 914         struct ifaddrs *ifap;
 915         struct ifaddrs *curp;
 916         int offset = 0;
 917         int sn_offset = 0;
 918         int error = 0;
 919         char *buffer;
 920         struct hv_kvp_ipaddr_value *ip_buffer;
 921         char cidr_mask[5]; /* /xyz */
 922         int weight;
 923         int i;
 924         unsigned int *w;
 925         char *sn_str;
 926         struct sockaddr_in6 *addr6;
 927
 928         if (op == KVP_OP_ENUMERATE) {
 929                 buffer = out_buffer;
 930         } else {
 931                 ip_buffer = out_buffer;
 932                 buffer = (char *)ip_buffer->ip_addr;
 933                 ip_buffer->addr_family = 0;
 934         }
 935         /*
 936          * On entry into this function, the buffer is capable of holding the
 937          * maximum key value.
 938          */
 939
 940         if (getifaddrs(&ifap)) {
 941                 strcpy(buffer, "getifaddrs failed\n");
 942                 return HV_E_FAIL;
 943         }
 944
 945         curp = ifap;
 946         while (curp != NULL) {
 947                 if (curp->ifa_addr == NULL) {
 948                         curp = curp->ifa_next;
 949                         continue;
 950                 }
 951
 952                 if ((if_name != NULL) &&
 953                         (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
 954                         /*
 955                          * We want info about a specific interface;
 956                          * just continue.
 957                          */
 958                         curp = curp->ifa_next;
 959                         continue;
 960                 }
 961
 962                 /*
 963                  * We only support two address families: AF_INET and AF_INET6.
 964                  * If a family value of 0 is specified, we collect both
 965                  * supported address families; if not we gather info on
 966                  * the specified address family.
 967                  */
 968                 if ((((family != 0) &&
 969                          (curp->ifa_addr->sa_family != family))) ||
 970                          (curp->ifa_flags & IFF_LOOPBACK)) {
 971                         curp = curp->ifa_next;
 972                         continue;
 973                 }
 974                 if ((curp->ifa_addr->sa_family != AF_INET) &&
 975                         (curp->ifa_addr->sa_family != AF_INET6)) {
 976                         curp = curp->ifa_next;
 977                         continue;
 978                 }
 979
 980                 if (op == KVP_OP_GET_IP_INFO) {
 981                         /*
 982                          * Gather info other than the IP address.
 983                          * IP address info will be gathered later.
 984                          */
 985                         if (curp->ifa_addr->sa_family == AF_INET) {
 986                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
 987                                 /*
 988                                  * Get subnet info.
 989                                  */
 990                                 error = kvp_process_ip_address(
 991                                                              curp->ifa_netmask,
 992                                                              AF_INET,
 993                                                              (char *)
 994                                                              ip_buffer->sub_net,
 995                                                              length,
 996                                                              &sn_offset);
 997                                 if (error)
 998                                         goto gather_ipaddr;
 999                         } else {
1000                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
1001
1002                                 /*
1003                                  * Get subnet info in CIDR format.
1004                                  */
1005                                 weight = 0;
1006                                 sn_str = (char *)ip_buffer->sub_net;
1007                                 addr6 = (struct sockaddr_in6 *)
1008                                         curp->ifa_netmask;
1009                                 w = addr6->sin6_addr.s6_addr32;
1010
1011                                 for (i = 0; i < 4; i++)
1012                                         weight += hweight32(&w[i]);
1013
1014                                 sprintf(cidr_mask, "/%d", weight);
1015                                 if (length < sn_offset + strlen(cidr_mask) + 1)
1016                                         goto gather_ipaddr;
1017
1018                                 if (sn_offset == 0)
1019                                         strcpy(sn_str, cidr_mask);
1020                                 else {
1021                                         strcat((char *)ip_buffer->sub_net, ";");
1022                                         strcat(sn_str, cidr_mask);
1023                                 }
1024                                 sn_offset += strlen(sn_str) + 1;
1025                         }
1026
1027                         /*
1028                          * Collect other ip related configuration info.
1029                          */
1030
1031                         kvp_get_ipconfig_info(if_name, ip_buffer);
1032                 }
1033
1034 gather_ipaddr:
1035                 error = kvp_process_ip_address(curp->ifa_addr,
1036                                                 curp->ifa_addr->sa_family,
1037                                                 buffer,
1038                                                 length, &offset);
1039                 if (error)
1040                         goto getaddr_done;
1041
1042                 curp = curp->ifa_next;
1043         }
1044
1045 getaddr_done:
1046         freeifaddrs(ifap);
1047         return error;
1048 }
1049
1050
1051 static int expand_ipv6(char *addr, int type)
1052 {
1053         int ret;
1054         struct in6_addr v6_addr;
1055
1056         ret = inet_pton(AF_INET6, addr, &v6_addr);
1057
1058         if (ret != 1) {
1059                 if (type == NETMASK)
1060                         return 1;
1061                 return 0;
1062         }
1063
1064         sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1065                 "%02x%02x:%02x%02x:%02x%02x",
1066                 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1067                 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1068                 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1069                 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1070                 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1071                 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1072                 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1073                 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1074
1075         return 1;
1076
1077 }
1078
1079 static int is_ipv4(char *addr)
1080 {
1081         int ret;
1082         struct in_addr ipv4_addr;
1083
1084         ret = inet_pton(AF_INET, addr, &ipv4_addr);
1085
1086         if (ret == 1)
1087                 return 1;
1088         return 0;
1089 }
1090
1091 static int parse_ip_val_buffer(char *in_buf, int *offset,
1092                                 char *out_buf, int out_len)
1093 {
1094         char *x;
1095         char *start;
1096
1097         /*
1098          * in_buf has sequence of characters that are seperated by
1099          * the character ';'. The last sequence does not have the
1100          * terminating ";" character.
1101          */
1102         start = in_buf + *offset;
1103
1104         x = strchr(start, ';');
1105         if (x)
1106                 *x = 0;
1107         else
1108                 x = start + strlen(start);
1109
1110         if (strlen(start) != 0) {
1111                 int i = 0;
1112                 /*
1113                  * Get rid of leading spaces.
1114                  */
1115                 while (start[i] == ' ')
1116                         i++;
1117
1118                 if ((x - start) <= out_len) {
1119                         strcpy(out_buf, (start + i));
1120                         *offset += (x - start) + 1;
1121                         return 1;
1122                 }
1123         }
1124         return 0;
1125 }
1126
1127 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1128 {
1129         int ret;
1130
1131         ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1132
1133         if (ret < 0)
1134                 return HV_E_FAIL;
1135
1136         return 0;
1137 }
1138
1139
1140 static int process_ip_string(FILE *f, char *ip_string, int type)
1141 {
1142         int error = 0;
1143         char addr[INET6_ADDRSTRLEN];
1144         int i = 0;
1145         int j = 0;
1146         char str[256];
1147         char sub_str[10];
1148         int offset = 0;
1149
1150         memset(addr, 0, sizeof(addr));
1151
1152         while (parse_ip_val_buffer(ip_string, &offset, addr,
1153                                         (MAX_IP_ADDR_SIZE * 2))) {
1154
1155                 sub_str[0] = 0;
1156                 if (is_ipv4(addr)) {
1157                         switch (type) {
1158                         case IPADDR:
1159                                 snprintf(str, sizeof(str), "%s", "IPADDR");
1160                                 break;
1161                         case NETMASK:
1162                                 snprintf(str, sizeof(str), "%s", "NETMASK");
1163                                 break;
1164                         case GATEWAY:
1165                                 snprintf(str, sizeof(str), "%s", "GATEWAY");
1166                                 break;
1167                         case DNS:
1168                                 snprintf(str, sizeof(str), "%s", "DNS");
1169                                 break;
1170                         }
1171
1172                         if (type == DNS) {
1173                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1174                         } else if (type == GATEWAY && i == 0) {
1175                                 ++i;
1176                         } else {
1177                                 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1178                         }
1179
1180
1181                 } else if (expand_ipv6(addr, type)) {
1182                         switch (type) {
1183                         case IPADDR:
1184                                 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1185                                 break;
1186                         case NETMASK:
1187                                 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1188                                 break;
1189                         case GATEWAY:
1190                                 snprintf(str, sizeof(str), "%s",
1191                                         "IPV6_DEFAULTGW");
1192                                 break;
1193                         case DNS:
1194                                 snprintf(str, sizeof(str), "%s",  "DNS");
1195                                 break;
1196                         }
1197
1198                         if (type == DNS) {
1199                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1200                         } else if (j == 0) {
1201                                 ++j;
1202                         } else {
1203                                 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1204                         }
1205                 } else {
1206                         return  HV_INVALIDARG;
1207                 }
1208
1209                 error = kvp_write_file(f, str, sub_str, addr);
1210                 if (error)
1211                         return error;
1212                 memset(addr, 0, sizeof(addr));
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1219 {
1220         int error = 0;
1221         char if_file[128];
1222         FILE *file;
1223         char cmd[512];
1224         char *mac_addr;
1225
1226         /*
1227          * Set the configuration for the specified interface with
1228          * the information provided. Since there is no standard
1229          * way to configure an interface, we will have an external
1230          * script that does the job of configuring the interface and
1231          * flushing the configuration.
1232          *
1233          * The parameters passed to this external script are:
1234          * 1. A configuration file that has the specified configuration.
1235          *
1236          * We will embed the name of the interface in the configuration
1237          * file: ifcfg-ethx (where ethx is the interface name).
1238          *
1239          * The information provided here may be more than what is needed
1240          * in a given distro to configure the interface and so are free
1241          * ignore information that may not be relevant.
1242          *
1243          * Here is the format of the ip configuration file:
1244          *
1245          * HWADDR=macaddr
1246          * DEVICE=interface name
1247          * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1248          *                       or "none" if no boot-time protocol should be used)
1249          *
1250          * IPADDR0=ipaddr1
1251          * IPADDR1=ipaddr2
1252          * IPADDRx=ipaddry (where y = x + 1)
1253          *
1254          * NETMASK0=netmask1
1255          * NETMASKx=netmasky (where y = x + 1)
1256          *
1257          * GATEWAY=ipaddr1
1258          * GATEWAYx=ipaddry (where y = x + 1)
1259          *
1260          * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1261          *
1262          * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1263          * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1264          * IPV6NETMASK.
1265          *
1266          * The host can specify multiple ipv4 and ipv6 addresses to be
1267          * configured for the interface. Furthermore, the configuration
1268          * needs to be persistent. A subsequent GET call on the interface
1269          * is expected to return the configuration that is set via the SET
1270          * call.
1271          */
1272
1273         snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1274                 "/ifcfg-", if_name);
1275
1276         file = fopen(if_file, "w");
1277
1278         if (file == NULL) {
1279                 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1280                                 errno, strerror(errno));
1281                 return HV_E_FAIL;
1282         }
1283
1284         /*
1285          * First write out the MAC address.
1286          */
1287
1288         mac_addr = kvp_if_name_to_mac(if_name);
1289         if (mac_addr == NULL) {
1290                 error = HV_E_FAIL;
1291                 goto setval_error;
1292         }
1293
1294         error = kvp_write_file(file, "HWADDR", "", mac_addr);
1295         free(mac_addr);
1296         if (error)
1297                 goto setval_error;
1298
1299         error = kvp_write_file(file, "DEVICE", "", if_name);
1300         if (error)
1301                 goto setval_error;
1302
1303         /*
1304          * The dhcp_enabled flag is only for IPv4. In the case the host only
1305          * injects an IPv6 address, the flag is true, but we still need to
1306          * proceed to parse and pass the IPv6 information to the
1307          * disto-specific script hv_set_ifconfig.
1308          */
1309         if (new_val->dhcp_enabled) {
1310                 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1311                 if (error)
1312                         goto setval_error;
1313
1314         } else {
1315                 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1316                 if (error)
1317                         goto setval_error;
1318         }
1319
1320         /*
1321          * Write the configuration for ipaddress, netmask, gateway and
1322          * name servers.
1323          */
1324
1325         error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1326         if (error)
1327                 goto setval_error;
1328
1329         error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1330         if (error)
1331                 goto setval_error;
1332
1333         error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1334         if (error)
1335                 goto setval_error;
1336
1337         error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1338         if (error)
1339                 goto setval_error;
1340
1341         fclose(file);
1342
1343         /*
1344          * Now that we have populated the configuration file,
1345          * invoke the external script to do its magic.
1346          */
1347
1348         snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s",
1349                  "hv_set_ifconfig", if_file);
1350         if (system(cmd)) {
1351                 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1352                                 cmd, errno, strerror(errno));
1353                 return HV_E_FAIL;
1354         }
1355         return 0;
1356
1357 setval_error:
1358         syslog(LOG_ERR, "Failed to write config file");
1359         fclose(file);
1360         return error;
1361 }
1362
1363
1364 static void
1365 kvp_get_domain_name(char *buffer, int length)
1366 {
1367         struct addrinfo hints, *info ;
1368         int error = 0;
1369
1370         gethostname(buffer, length);
1371         memset(&hints, 0, sizeof(hints));
1372         hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1373         hints.ai_socktype = SOCK_STREAM;
1374         hints.ai_flags = AI_CANONNAME;
1375
1376         error = getaddrinfo(buffer, NULL, &hints, &info);
1377         if (error != 0) {
1378                 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1379                         error, gai_strerror(error));
1380                 return;
1381         }
1382         snprintf(buffer, length, "%s", info->ai_canonname);
1383         freeaddrinfo(info);
1384 }
1385
1386 void print_usage(char *argv[])
1387 {
1388         fprintf(stderr, "Usage: %s [options]\n"
1389                 "Options are:\n"
1390                 "  -n, --no-daemon        stay in foreground, don't daemonize\n"
1391                 "  -h, --help             print this help\n", argv[0]);
1392 }
1393
1394 int main(int argc, char *argv[])
1395 {
1396         int kvp_fd, len;
1397         int error;
1398         struct pollfd pfd;
1399         char    *p;
1400         struct hv_kvp_msg hv_msg[1];
1401         char    *key_value;
1402         char    *key_name;
1403         int     op;
1404         int     pool;
1405         char    *if_name;
1406         struct hv_kvp_ipaddr_value *kvp_ip_val;
1407         int daemonize = 1, long_index = 0, opt;
1408
1409         static struct option long_options[] = {
1410                 {"help",        no_argument,       0,  'h' },
1411                 {"no-daemon",   no_argument,       0,  'n' },
1412                 {0,             0,                 0,  0   }
1413         };
1414
1415         while ((opt = getopt_long(argc, argv, "hn", long_options,
1416                                   &long_index)) != -1) {
1417                 switch (opt) {
1418                 case 'n':
1419                         daemonize = 0;
1420                         break;
1421                 case 'h':
1422                 default:
1423                         print_usage(argv);
1424                         exit(EXIT_FAILURE);
1425                 }
1426         }
1427
1428         if (daemonize && daemon(1, 0))
1429                 return 1;
1430
1431         openlog("KVP", 0, LOG_USER);
1432         syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1433
1434         kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC);
1435
1436         if (kvp_fd < 0) {
1437                 syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s",
1438                         errno, strerror(errno));
1439                 exit(EXIT_FAILURE);
1440         }
1441
1442         /*
1443          * Retrieve OS release information.
1444          */
1445         kvp_get_os_info();
1446         /*
1447          * Cache Fully Qualified Domain Name because getaddrinfo takes an
1448          * unpredictable amount of time to finish.
1449          */
1450         kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
1451
1452         if (kvp_file_init()) {
1453                 syslog(LOG_ERR, "Failed to initialize the pools");
1454                 exit(EXIT_FAILURE);
1455         }
1456
1457         /*
1458          * Register ourselves with the kernel.
1459          */
1460         hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1461         len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1462         if (len != sizeof(struct hv_kvp_msg)) {
1463                 syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
1464                        errno, strerror(errno));
1465                 close(kvp_fd);
1466                 exit(EXIT_FAILURE);
1467         }
1468
1469         pfd.fd = kvp_fd;
1470
1471         while (1) {
1472                 pfd.events = POLLIN;
1473                 pfd.revents = 0;
1474
1475                 if (poll(&pfd, 1, -1) < 0) {
1476                         syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1477                         if (errno == EINVAL) {
1478                                 close(kvp_fd);
1479                                 exit(EXIT_FAILURE);
1480                         }
1481                         else
1482                                 continue;
1483                 }
1484
1485                 len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1486
1487                 if (len != sizeof(struct hv_kvp_msg)) {
1488                         syslog(LOG_ERR, "read failed; error:%d %s",
1489                                errno, strerror(errno));
1490
1491                         close(kvp_fd);
1492                         return EXIT_FAILURE;
1493                 }
1494
1495                 /*
1496                  * We will use the KVP header information to pass back
1497                  * the error from this daemon. So, first copy the state
1498                  * and set the error code to success.
1499                  */
1500                 op = hv_msg->kvp_hdr.operation;
1501                 pool = hv_msg->kvp_hdr.pool;
1502                 hv_msg->error = HV_S_OK;
1503
1504                 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1505                         /*
1506                          * Driver is registering with us; stash away the version
1507                          * information.
1508                          */
1509                         in_hand_shake = 0;
1510                         p = (char *)hv_msg->body.kvp_register.version;
1511                         lic_version = malloc(strlen(p) + 1);
1512                         if (lic_version) {
1513                                 strcpy(lic_version, p);
1514                                 syslog(LOG_INFO, "KVP LIC Version: %s",
1515                                        lic_version);
1516                         } else {
1517                                 syslog(LOG_ERR, "malloc failed");
1518                         }
1519                         continue;
1520                 }
1521
1522                 switch (op) {
1523                 case KVP_OP_GET_IP_INFO:
1524                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1525                         if_name =
1526                         kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1527
1528                         if (if_name == NULL) {
1529                                 /*
1530                                  * We could not map the mac address to an
1531                                  * interface name; return error.
1532                                  */
1533                                 hv_msg->error = HV_E_FAIL;
1534                                 break;
1535                         }
1536                         error = kvp_get_ip_info(
1537                                                 0, if_name, KVP_OP_GET_IP_INFO,
1538                                                 kvp_ip_val,
1539                                                 (MAX_IP_ADDR_SIZE * 2));
1540
1541                         if (error)
1542                                 hv_msg->error = error;
1543
1544                         free(if_name);
1545                         break;
1546
1547                 case KVP_OP_SET_IP_INFO:
1548                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1549                         if_name = kvp_get_if_name(
1550                                         (char *)kvp_ip_val->adapter_id);
1551                         if (if_name == NULL) {
1552                                 /*
1553                                  * We could not map the guid to an
1554                                  * interface name; return error.
1555                                  */
1556                                 hv_msg->error = HV_GUID_NOTFOUND;
1557                                 break;
1558                         }
1559                         error = kvp_set_ip_info(if_name, kvp_ip_val);
1560                         if (error)
1561                                 hv_msg->error = error;
1562
1563                         free(if_name);
1564                         break;
1565
1566                 case KVP_OP_SET:
1567                         if (kvp_key_add_or_modify(pool,
1568                                         hv_msg->body.kvp_set.data.key,
1569                                         hv_msg->body.kvp_set.data.key_size,
1570                                         hv_msg->body.kvp_set.data.value,
1571                                         hv_msg->body.kvp_set.data.value_size))
1572                                         hv_msg->error = HV_S_CONT;
1573                         break;
1574
1575                 case KVP_OP_GET:
1576                         if (kvp_get_value(pool,
1577                                         hv_msg->body.kvp_set.data.key,
1578                                         hv_msg->body.kvp_set.data.key_size,
1579                                         hv_msg->body.kvp_set.data.value,
1580                                         hv_msg->body.kvp_set.data.value_size))
1581                                         hv_msg->error = HV_S_CONT;
1582                         break;
1583
1584                 case KVP_OP_DELETE:
1585                         if (kvp_key_delete(pool,
1586                                         hv_msg->body.kvp_delete.key,
1587                                         hv_msg->body.kvp_delete.key_size))
1588                                         hv_msg->error = HV_S_CONT;
1589                         break;
1590
1591                 default:
1592                         break;
1593                 }
1594
1595                 if (op != KVP_OP_ENUMERATE)
1596                         goto kvp_done;
1597
1598                 /*
1599                  * If the pool is KVP_POOL_AUTO, dynamically generate
1600                  * both the key and the value; if not read from the
1601                  * appropriate pool.
1602                  */
1603                 if (pool != KVP_POOL_AUTO) {
1604                         if (kvp_pool_enumerate(pool,
1605                                         hv_msg->body.kvp_enum_data.index,
1606                                         hv_msg->body.kvp_enum_data.data.key,
1607                                         HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1608                                         hv_msg->body.kvp_enum_data.data.value,
1609                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1610                                         hv_msg->error = HV_S_CONT;
1611                         goto kvp_done;
1612                 }
1613
1614                 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1615                 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1616
1617                 switch (hv_msg->body.kvp_enum_data.index) {
1618                 case FullyQualifiedDomainName:
1619                         strcpy(key_value, full_domain_name);
1620                         strcpy(key_name, "FullyQualifiedDomainName");
1621                         break;
1622                 case IntegrationServicesVersion:
1623                         strcpy(key_name, "IntegrationServicesVersion");
1624                         strcpy(key_value, lic_version);
1625                         break;
1626                 case NetworkAddressIPv4:
1627                         kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1628                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1629                         strcpy(key_name, "NetworkAddressIPv4");
1630                         break;
1631                 case NetworkAddressIPv6:
1632                         kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1633                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1634                         strcpy(key_name, "NetworkAddressIPv6");
1635                         break;
1636                 case OSBuildNumber:
1637                         strcpy(key_value, os_build);
1638                         strcpy(key_name, "OSBuildNumber");
1639                         break;
1640                 case OSName:
1641                         strcpy(key_value, os_name);
1642                         strcpy(key_name, "OSName");
1643                         break;
1644                 case OSMajorVersion:
1645                         strcpy(key_value, os_major);
1646                         strcpy(key_name, "OSMajorVersion");
1647                         break;
1648                 case OSMinorVersion:
1649                         strcpy(key_value, os_minor);
1650                         strcpy(key_name, "OSMinorVersion");
1651                         break;
1652                 case OSVersion:
1653                         strcpy(key_value, os_version);
1654                         strcpy(key_name, "OSVersion");
1655                         break;
1656                 case ProcessorArchitecture:
1657                         strcpy(key_value, processor_arch);
1658                         strcpy(key_name, "ProcessorArchitecture");
1659                         break;
1660                 default:
1661                         hv_msg->error = HV_S_CONT;
1662                         break;
1663                 }
1664
1665                 /* Send the value back to the kernel. */
1666 kvp_done:
1667                 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1668                 if (len != sizeof(struct hv_kvp_msg)) {
1669                         syslog(LOG_ERR, "write failed; error: %d %s", errno,
1670                                strerror(errno));
1671                         exit(EXIT_FAILURE);
1672                 }
1673         }
1674
1675         close(kvp_fd);
1676         exit(0);
1677 }