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 58enum 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 72enum { 73 IPADDR = 0, 74 NETMASK, 75 GATEWAY, 76 DNS 77}; 78 79static int in_hand_shake; 80 81static char *os_name = ""; 82static char *os_major = ""; 83static char *os_minor = ""; 84static char *processor_arch; 85static char *os_build; 86static char *os_version; 87static char *lic_version = "Unknown version"; 88static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; 89static 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 106struct kvp_record { 107 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; 108 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; 109}; 110 111struct 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 119static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT]; 120 121static 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 133static 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 145static 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 175static 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 - records_read, 197 filep); 198 199 if (ferror(filep)) { 200 syslog(LOG_ERR, 201 "Failed to read file, pool: %d; error: %d %s", 202 pool, errno, strerror(errno)); 203 kvp_release_lock(pool); 204 exit(EXIT_FAILURE); 205 } 206 207 if (!feof(filep)) { 208 /* 209 * We have more data to read. 210 */ 211 num_blocks++; 212 record = realloc(record, alloc_unit * num_blocks); 213 214 if (record == NULL) { 215 syslog(LOG_ERR, "malloc failed"); 216 kvp_release_lock(pool); 217 exit(EXIT_FAILURE); 218 } 219 continue; 220 } 221 break; 222 } 223 224 kvp_file_info[pool].num_blocks = num_blocks; 225 kvp_file_info[pool].records = record; 226 kvp_file_info[pool].num_records = records_read; 227 228 fclose(filep); 229 kvp_release_lock(pool); 230} 231 232static int kvp_file_init(void) 233{ 234 int fd; 235 char *fname; 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 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i); 250 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */); 251 252 if (fd == -1) 253 return 1; 254 255 kvp_file_info[i].fd = fd; 256 kvp_file_info[i].num_blocks = 1; 257 kvp_file_info[i].records = malloc(alloc_unit); 258 if (kvp_file_info[i].records == NULL) 259 return 1; 260 kvp_file_info[i].num_records = 0; 261 kvp_update_mem_state(i); 262 } 263 264 return 0; 265} 266 267static int kvp_key_delete(int pool, const __u8 *key, int key_size) 268{ 269 int i; 270 int j, k; 271 int num_records; 272 struct kvp_record *record; 273 274 /* 275 * First update the in-memory state. 276 */ 277 kvp_update_mem_state(pool); 278 279 num_records = kvp_file_info[pool].num_records; 280 record = kvp_file_info[pool].records; 281 282 for (i = 0; i < num_records; i++) { 283 if (memcmp(key, record[i].key, key_size)) 284 continue; 285 /* 286 * Found a match; just move the remaining 287 * entries up. 288 */ 289 if (i == (num_records - 1)) { 290 kvp_file_info[pool].num_records--; 291 kvp_update_file(pool); 292 return 0; 293 } 294 295 j = i; 296 k = j + 1; 297 for (; k < num_records; k++) { 298 strcpy(record[j].key, record[k].key); 299 strcpy(record[j].value, record[k].value); 300 j++; 301 } 302 303 kvp_file_info[pool].num_records--; 304 kvp_update_file(pool); 305 return 0; 306 } 307 return 1; 308} 309 310static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size, 311 const __u8 *value, int value_size) 312{ 313 int i; 314 int num_records; 315 struct kvp_record *record; 316 int num_blocks; 317 318 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || 319 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) 320 return 1; 321 322 /* 323 * First update the in-memory state. 324 */ 325 kvp_update_mem_state(pool); 326 327 num_records = kvp_file_info[pool].num_records; 328 record = kvp_file_info[pool].records; 329 num_blocks = kvp_file_info[pool].num_blocks; 330 331 for (i = 0; i < num_records; i++) { 332 if (memcmp(key, record[i].key, key_size)) 333 continue; 334 /* 335 * Found a match; just update the value - 336 * this is the modify case. 337 */ 338 memcpy(record[i].value, value, value_size); 339 kvp_update_file(pool); 340 return 0; 341 } 342 343 /* 344 * Need to add a new entry; 345 */ 346 if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) { 347 /* Need to allocate a larger array for reg entries. */ 348 record = realloc(record, sizeof(struct kvp_record) * 349 ENTRIES_PER_BLOCK * (num_blocks + 1)); 350 351 if (record == NULL) 352 return 1; 353 kvp_file_info[pool].num_blocks++; 354 355 } 356 memcpy(record[i].value, value, value_size); 357 memcpy(record[i].key, key, key_size); 358 kvp_file_info[pool].records = record; 359 kvp_file_info[pool].num_records++; 360 kvp_update_file(pool); 361 return 0; 362} 363 364static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value, 365 int value_size) 366{ 367 int i; 368 int num_records; 369 struct kvp_record *record; 370 371 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || 372 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) 373 return 1; 374 375 /* 376 * First update the in-memory state. 377 */ 378 kvp_update_mem_state(pool); 379 380 num_records = kvp_file_info[pool].num_records; 381 record = kvp_file_info[pool].records; 382 383 for (i = 0; i < num_records; i++) { 384 if (memcmp(key, record[i].key, key_size)) 385 continue; 386 /* 387 * Found a match; just copy the value out. 388 */ 389 memcpy(value, record[i].value, value_size); 390 return 0; 391 } 392 393 return 1; 394} 395 396static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size, 397 __u8 *value, int value_size) 398{ 399 struct kvp_record *record; 400 401 /* 402 * First update our in-memory database. 403 */ 404 kvp_update_mem_state(pool); 405 record = kvp_file_info[pool].records; 406 407 if (index >= kvp_file_info[pool].num_records) { 408 return 1; 409 } 410 411 memcpy(key, record[index].key, key_size); 412 memcpy(value, record[index].value, value_size); 413 return 0; 414} 415 416 417void kvp_get_os_info(void) 418{ 419 FILE *file; 420 char *p, buf[512]; 421 422 uname(&uts_buf); 423 os_version = uts_buf.release; 424 os_build = strdup(uts_buf.release); 425 426 os_name = uts_buf.sysname; 427 processor_arch = uts_buf.machine; 428 429 /* 430 * The current windows host (win7) expects the build 431 * string to be of the form: x.y.z 432 * Strip additional information we may have. 433 */ 434 p = strchr(os_version, '-'); 435 if (p) 436 *p = '\0'; 437 438 /* 439 * Parse the /etc/os-release file if present: 440 * https://www.freedesktop.org/software/systemd/man/os-release.html 441 */ 442 file = fopen("/etc/os-release", "r"); 443 if (file != NULL) { 444 while (fgets(buf, sizeof(buf), file)) { 445 char *value, *q; 446 447 /* Ignore comments */ 448 if (buf[0] == '#') 449 continue; 450 451 /* Split into name=value */ 452 p = strchr(buf, '='); 453 if (!p) 454 continue; 455 *p++ = 0; 456 457 /* Remove quotes and newline; un-escape */ 458 value = p; 459 q = p; 460 while (*p) { 461 if (*p == '\\') { 462 ++p; 463 if (!*p) 464 break; 465 *q++ = *p++; 466 } else if (*p == '\'' || *p == '"' || 467 *p == '\n') { 468 ++p; 469 } else { 470 *q++ = *p++; 471 } 472 } 473 *q = 0; 474 475 if (!strcmp(buf, "NAME")) { 476 p = strdup(value); 477 if (!p) 478 break; 479 os_name = p; 480 } else if (!strcmp(buf, "VERSION_ID")) { 481 p = strdup(value); 482 if (!p) 483 break; 484 os_major = p; 485 } 486 } 487 fclose(file); 488 return; 489 } 490 491 /* Fallback for older RH/SUSE releases */ 492 file = fopen("/etc/SuSE-release", "r"); 493 if (file != NULL) 494 goto kvp_osinfo_found; 495 file = fopen("/etc/redhat-release", "r"); 496 if (file != NULL) 497 goto kvp_osinfo_found; 498 499 /* 500 * We don't have information about the os. 501 */ 502 return; 503 504kvp_osinfo_found: 505 /* up to three lines */ 506 p = fgets(buf, sizeof(buf), file); 507 if (p) { 508 p = strchr(buf, '\n'); 509 if (p) 510 *p = '\0'; 511 p = strdup(buf); 512 if (!p) 513 goto done; 514 os_name = p; 515 516 /* second line */ 517 p = fgets(buf, sizeof(buf), file); 518 if (p) { 519 p = strchr(buf, '\n'); 520 if (p) 521 *p = '\0'; 522 p = strdup(buf); 523 if (!p) 524 goto done; 525 os_major = p; 526 527 /* third line */ 528 p = fgets(buf, sizeof(buf), file); 529 if (p) { 530 p = strchr(buf, '\n'); 531 if (p) 532 *p = '\0'; 533 p = strdup(buf); 534 if (p) 535 os_minor = p; 536 } 537 } 538 } 539 540done: 541 fclose(file); 542 return; 543} 544 545 546 547/* 548 * Retrieve an interface name corresponding to the specified guid. 549 * If there is a match, the function returns a pointer 550 * to the interface name and if not, a NULL is returned. 551 * If a match is found, the caller is responsible for 552 * freeing the memory. 553 */ 554 555static char *kvp_get_if_name(char *guid) 556{ 557 DIR *dir; 558 struct dirent *entry; 559 FILE *file; 560 char *p, *x; 561 char *if_name = NULL; 562 char buf[256]; 563 char dev_id[PATH_MAX]; 564 565 dir = opendir(KVP_NET_DIR); 566 if (dir == NULL) 567 return NULL; 568 569 while ((entry = readdir(dir)) != NULL) { 570 /* 571 * Set the state for the next pass. 572 */ 573 snprintf(dev_id, sizeof(dev_id), "%s%s/device/device_id", 574 KVP_NET_DIR, entry->d_name); 575 576 file = fopen(dev_id, "r"); 577 if (file == NULL) 578 continue; 579 580 p = fgets(buf, sizeof(buf), file); 581 if (p) { 582 x = strchr(p, '\n'); 583 if (x) 584 *x = '\0'; 585 586 if (!strcmp(p, guid)) { 587 /* 588 * Found the guid match; return the interface 589 * name. The caller will free the memory. 590 */ 591 if_name = strdup(entry->d_name); 592 fclose(file); 593 break; 594 } 595 } 596 fclose(file); 597 } 598 599 closedir(dir); 600 return if_name; 601} 602 603/* 604 * Retrieve the MAC address given the interface name. 605 */ 606 607static char *kvp_if_name_to_mac(char *if_name) 608{ 609 FILE *file; 610 char *p, *x; 611 char buf[256]; 612 char addr_file[PATH_MAX]; 613 unsigned int i; 614 char *mac_addr = NULL; 615 616 snprintf(addr_file, sizeof(addr_file), "%s%s%s", KVP_NET_DIR, 617 if_name, "/address"); 618 619 file = fopen(addr_file, "r"); 620 if (file == NULL) 621 return NULL; 622 623 p = fgets(buf, sizeof(buf), file); 624 if (p) { 625 x = strchr(p, '\n'); 626 if (x) 627 *x = '\0'; 628 for (i = 0; i < strlen(p); i++) 629 p[i] = toupper(p[i]); 630 mac_addr = strdup(p); 631 } 632 633 fclose(file); 634 return mac_addr; 635} 636 637static void kvp_process_ipconfig_file(char *cmd, 638 char *config_buf, unsigned int len, 639 int element_size, int offset) 640{ 641 char buf[256]; 642 char *p; 643 char *x; 644 FILE *file; 645 646 /* 647 * First execute the command. 648 */ 649 file = popen(cmd, "r"); 650 if (file == NULL) 651 return; 652 653 if (offset == 0) 654 memset(config_buf, 0, len); 655 while ((p = fgets(buf, sizeof(buf), file)) != NULL) { 656 if (len < strlen(config_buf) + element_size + 1) 657 break; 658 659 x = strchr(p, '\n'); 660 if (x) 661 *x = '\0'; 662 663 strcat(config_buf, p); 664 strcat(config_buf, ";"); 665 } 666 pclose(file); 667} 668 669static void kvp_get_ipconfig_info(char *if_name, 670 struct hv_kvp_ipaddr_value *buffer) 671{ 672 char cmd[512]; 673 char dhcp_info[128]; 674 char *p; 675 FILE *file; 676 677 /* 678 * Get the address of default gateway (ipv4). 679 */ 680 sprintf(cmd, "%s %s", "ip route show dev", if_name); 681 strcat(cmd, " | awk '/default/ {print $3 }'"); 682 683 /* 684 * Execute the command to gather gateway info. 685 */ 686 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, 687 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0); 688 689 /* 690 * Get the address of default gateway (ipv6). 691 */ 692 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name); 693 strcat(cmd, " | awk '/default/ {print $3 }'"); 694 695 /* 696 * Execute the command to gather gateway info (ipv6). 697 */ 698 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, 699 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1); 700 701 702 /* 703 * Gather the DNS state. 704 * Since there is no standard way to get this information 705 * across various distributions of interest; we just invoke 706 * an external script that needs to be ported across distros 707 * of interest. 708 * 709 * Following is the expected format of the information from the script: 710 * 711 * ipaddr1 (nameserver1) 712 * ipaddr2 (nameserver2) 713 * . 714 * . 715 */ 716 717 sprintf(cmd, KVP_SCRIPTS_PATH "%s", "hv_get_dns_info"); 718 719 /* 720 * Execute the command to gather DNS info. 721 */ 722 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr, 723 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0); 724 725 /* 726 * Gather the DHCP state. 727 * We will gather this state by invoking an external script. 728 * The parameter to the script is the interface name. 729 * Here is the expected output: 730 * 731 * Enabled: DHCP enabled. 732 */ 733 734 sprintf(cmd, KVP_SCRIPTS_PATH "%s %s", "hv_get_dhcp_info", if_name); 735 736 file = popen(cmd, "r"); 737 if (file == NULL) 738 return; 739 740 p = fgets(dhcp_info, sizeof(dhcp_info), file); 741 if (p == NULL) { 742 pclose(file); 743 return; 744 } 745 746 if (!strncmp(p, "Enabled", 7)) 747 buffer->dhcp_enabled = 1; 748 else 749 buffer->dhcp_enabled = 0; 750 751 pclose(file); 752} 753 754 755static unsigned int hweight32(unsigned int *w) 756{ 757 unsigned int res = *w - ((*w >> 1) & 0x55555555); 758 res = (res & 0x33333333) + ((res >> 2) & 0x33333333); 759 res = (res + (res >> 4)) & 0x0F0F0F0F; 760 res = res + (res >> 8); 761 return (res + (res >> 16)) & 0x000000FF; 762} 763 764static int kvp_process_ip_address(void *addrp, 765 int family, char *buffer, 766 int length, int *offset) 767{ 768 struct sockaddr_in *addr; 769 struct sockaddr_in6 *addr6; 770 int addr_length; 771 char tmp[50]; 772 const char *str; 773 774 if (family == AF_INET) { 775 addr = (struct sockaddr_in *)addrp; 776 str = inet_ntop(family, &addr->sin_addr, tmp, 50); 777 addr_length = INET_ADDRSTRLEN; 778 } else { 779 addr6 = (struct sockaddr_in6 *)addrp; 780 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50); 781 addr_length = INET6_ADDRSTRLEN; 782 } 783 784 if ((length - *offset) < addr_length + 2) 785 return HV_E_FAIL; 786 if (str == NULL) { 787 strcpy(buffer, "inet_ntop failed\n"); 788 return HV_E_FAIL; 789 } 790 if (*offset == 0) 791 strcpy(buffer, tmp); 792 else { 793 strcat(buffer, ";"); 794 strcat(buffer, tmp); 795 } 796 797 *offset += strlen(str) + 1; 798 799 return 0; 800} 801 802static int 803kvp_get_ip_info(int family, char *if_name, int op, 804 void *out_buffer, unsigned int length) 805{ 806 struct ifaddrs *ifap; 807 struct ifaddrs *curp; 808 int offset = 0; 809 int sn_offset = 0; 810 int error = 0; 811 char *buffer; 812 struct hv_kvp_ipaddr_value *ip_buffer = NULL; 813 char cidr_mask[5]; /* /xyz */ 814 int weight; 815 int i; 816 unsigned int *w; 817 char *sn_str; 818 struct sockaddr_in6 *addr6; 819 820 if (op == KVP_OP_ENUMERATE) { 821 buffer = out_buffer; 822 } else { 823 ip_buffer = out_buffer; 824 buffer = (char *)ip_buffer->ip_addr; 825 ip_buffer->addr_family = 0; 826 } 827 /* 828 * On entry into this function, the buffer is capable of holding the 829 * maximum key value. 830 */ 831 832 if (getifaddrs(&ifap)) { 833 strcpy(buffer, "getifaddrs failed\n"); 834 return HV_E_FAIL; 835 } 836 837 curp = ifap; 838 while (curp != NULL) { 839 if (curp->ifa_addr == NULL) { 840 curp = curp->ifa_next; 841 continue; 842 } 843 844 if ((if_name != NULL) && 845 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) { 846 /* 847 * We want info about a specific interface; 848 * just continue. 849 */ 850 curp = curp->ifa_next; 851 continue; 852 } 853 854 /* 855 * We only support two address families: AF_INET and AF_INET6. 856 * If a family value of 0 is specified, we collect both 857 * supported address families; if not we gather info on 858 * the specified address family. 859 */ 860 if ((((family != 0) && 861 (curp->ifa_addr->sa_family != family))) || 862 (curp->ifa_flags & IFF_LOOPBACK)) { 863 curp = curp->ifa_next; 864 continue; 865 } 866 if ((curp->ifa_addr->sa_family != AF_INET) && 867 (curp->ifa_addr->sa_family != AF_INET6)) { 868 curp = curp->ifa_next; 869 continue; 870 } 871 872 if (op == KVP_OP_GET_IP_INFO) { 873 /* 874 * Gather info other than the IP address. 875 * IP address info will be gathered later. 876 */ 877 if (curp->ifa_addr->sa_family == AF_INET) { 878 ip_buffer->addr_family |= ADDR_FAMILY_IPV4; 879 /* 880 * Get subnet info. 881 */ 882 error = kvp_process_ip_address( 883 curp->ifa_netmask, 884 AF_INET, 885 (char *) 886 ip_buffer->sub_net, 887 length, 888 &sn_offset); 889 if (error) 890 goto gather_ipaddr; 891 } else { 892 ip_buffer->addr_family |= ADDR_FAMILY_IPV6; 893 894 /* 895 * Get subnet info in CIDR format. 896 */ 897 weight = 0; 898 sn_str = (char *)ip_buffer->sub_net; 899 addr6 = (struct sockaddr_in6 *) 900 curp->ifa_netmask; 901 w = addr6->sin6_addr.s6_addr32; 902 903 for (i = 0; i < 4; i++) 904 weight += hweight32(&w[i]); 905 906 sprintf(cidr_mask, "/%d", weight); 907 if (length < sn_offset + strlen(cidr_mask) + 1) 908 goto gather_ipaddr; 909 910 if (sn_offset == 0) 911 strcpy(sn_str, cidr_mask); 912 else { 913 strcat((char *)ip_buffer->sub_net, ";"); 914 strcat(sn_str, cidr_mask); 915 } 916 sn_offset += strlen(sn_str) + 1; 917 } 918 919 /* 920 * Collect other ip related configuration info. 921 */ 922 923 kvp_get_ipconfig_info(if_name, ip_buffer); 924 } 925 926gather_ipaddr: 927 error = kvp_process_ip_address(curp->ifa_addr, 928 curp->ifa_addr->sa_family, 929 buffer, 930 length, &offset); 931 if (error) 932 goto getaddr_done; 933 934 curp = curp->ifa_next; 935 } 936 937getaddr_done: 938 freeifaddrs(ifap); 939 return error; 940} 941 942/* 943 * Retrieve the IP given the MAC address. 944 */ 945static int kvp_mac_to_ip(struct hv_kvp_ipaddr_value *kvp_ip_val) 946{ 947 char *mac = (char *)kvp_ip_val->adapter_id; 948 DIR *dir; 949 struct dirent *entry; 950 FILE *file; 951 char *p, *x; 952 char *if_name = NULL; 953 char buf[256]; 954 char dev_id[PATH_MAX]; 955 unsigned int i; 956 int error = HV_E_FAIL; 957 958 dir = opendir(KVP_NET_DIR); 959 if (dir == NULL) 960 return HV_E_FAIL; 961 962 while ((entry = readdir(dir)) != NULL) { 963 /* 964 * Set the state for the next pass. 965 */ 966 snprintf(dev_id, sizeof(dev_id), "%s%s/address", KVP_NET_DIR, 967 entry->d_name); 968 969 file = fopen(dev_id, "r"); 970 if (file == NULL) 971 continue; 972 973 p = fgets(buf, sizeof(buf), file); 974 fclose(file); 975 if (!p) 976 continue; 977 978 x = strchr(p, '\n'); 979 if (x) 980 *x = '\0'; 981 982 for (i = 0; i < strlen(p); i++) 983 p[i] = toupper(p[i]); 984 985 if (strcmp(p, mac)) 986 continue; 987 988 /* 989 * Found the MAC match. 990 * A NIC (e.g. VF) matching the MAC, but without IP, is skipped. 991 */ 992 if_name = entry->d_name; 993 if (!if_name) 994 continue; 995 996 error = kvp_get_ip_info(0, if_name, KVP_OP_GET_IP_INFO, 997 kvp_ip_val, MAX_IP_ADDR_SIZE * 2); 998 999 if (!error && strlen((char *)kvp_ip_val->ip_addr)) 1000 break; 1001 } 1002 1003 closedir(dir); 1004 return error; 1005} 1006 1007static int expand_ipv6(char *addr, int type) 1008{ 1009 int ret; 1010 struct in6_addr v6_addr; 1011 1012 ret = inet_pton(AF_INET6, addr, &v6_addr); 1013 1014 if (ret != 1) { 1015 if (type == NETMASK) 1016 return 1; 1017 return 0; 1018 } 1019 1020 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:" 1021 "%02x%02x:%02x%02x:%02x%02x", 1022 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1], 1023 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3], 1024 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5], 1025 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7], 1026 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9], 1027 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11], 1028 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13], 1029 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]); 1030 1031 return 1; 1032 1033} 1034 1035static int is_ipv4(char *addr) 1036{ 1037 int ret; 1038 struct in_addr ipv4_addr; 1039 1040 ret = inet_pton(AF_INET, addr, &ipv4_addr); 1041 1042 if (ret == 1) 1043 return 1; 1044 return 0; 1045} 1046 1047static int parse_ip_val_buffer(char *in_buf, int *offset, 1048 char *out_buf, int out_len) 1049{ 1050 char *x; 1051 char *start; 1052 1053 /* 1054 * in_buf has sequence of characters that are separated by 1055 * the character ';'. The last sequence does not have the 1056 * terminating ";" character. 1057 */ 1058 start = in_buf + *offset; 1059 1060 x = strchr(start, ';'); 1061 if (x) 1062 *x = 0; 1063 else 1064 x = start + strlen(start); 1065 1066 if (strlen(start) != 0) { 1067 int i = 0; 1068 /* 1069 * Get rid of leading spaces. 1070 */ 1071 while (start[i] == ' ') 1072 i++; 1073 1074 if ((x - start) <= out_len) { 1075 strcpy(out_buf, (start + i)); 1076 *offset += (x - start) + 1; 1077 return 1; 1078 } 1079 } 1080 return 0; 1081} 1082 1083static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3) 1084{ 1085 int ret; 1086 1087 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3); 1088 1089 if (ret < 0) 1090 return HV_E_FAIL; 1091 1092 return 0; 1093} 1094 1095 1096static int process_ip_string(FILE *f, char *ip_string, int type) 1097{ 1098 int error = 0; 1099 char addr[INET6_ADDRSTRLEN]; 1100 int i = 0; 1101 int j = 0; 1102 char str[256]; 1103 char sub_str[13]; 1104 int offset = 0; 1105 1106 memset(addr, 0, sizeof(addr)); 1107 1108 while (parse_ip_val_buffer(ip_string, &offset, addr, 1109 (MAX_IP_ADDR_SIZE * 2))) { 1110 1111 sub_str[0] = 0; 1112 if (is_ipv4(addr)) { 1113 switch (type) { 1114 case IPADDR: 1115 snprintf(str, sizeof(str), "%s", "IPADDR"); 1116 break; 1117 case NETMASK: 1118 snprintf(str, sizeof(str), "%s", "NETMASK"); 1119 break; 1120 case GATEWAY: 1121 snprintf(str, sizeof(str), "%s", "GATEWAY"); 1122 break; 1123 case DNS: 1124 snprintf(str, sizeof(str), "%s", "DNS"); 1125 break; 1126 } 1127 1128 if (type == DNS) { 1129 snprintf(sub_str, sizeof(sub_str), "%d", ++i); 1130 } else if (type == GATEWAY && i == 0) { 1131 ++i; 1132 } else { 1133 snprintf(sub_str, sizeof(sub_str), "%d", i++); 1134 } 1135 1136 1137 } else if (expand_ipv6(addr, type)) { 1138 switch (type) { 1139 case IPADDR: 1140 snprintf(str, sizeof(str), "%s", "IPV6ADDR"); 1141 break; 1142 case NETMASK: 1143 snprintf(str, sizeof(str), "%s", "IPV6NETMASK"); 1144 break; 1145 case GATEWAY: 1146 snprintf(str, sizeof(str), "%s", 1147 "IPV6_DEFAULTGW"); 1148 break; 1149 case DNS: 1150 snprintf(str, sizeof(str), "%s", "DNS"); 1151 break; 1152 } 1153 1154 if (type == DNS) { 1155 snprintf(sub_str, sizeof(sub_str), "%d", ++i); 1156 } else if (j == 0) { 1157 ++j; 1158 } else { 1159 snprintf(sub_str, sizeof(sub_str), "_%d", j++); 1160 } 1161 } else { 1162 return HV_INVALIDARG; 1163 } 1164 1165 error = kvp_write_file(f, str, sub_str, addr); 1166 if (error) 1167 return error; 1168 memset(addr, 0, sizeof(addr)); 1169 } 1170 1171 return 0; 1172} 1173 1174static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) 1175{ 1176 int error = 0; 1177 char if_file[PATH_MAX]; 1178 FILE *file; 1179 char cmd[PATH_MAX]; 1180 char *mac_addr; 1181 int str_len; 1182 1183 /* 1184 * Set the configuration for the specified interface with 1185 * the information provided. Since there is no standard 1186 * way to configure an interface, we will have an external 1187 * script that does the job of configuring the interface and 1188 * flushing the configuration. 1189 * 1190 * The parameters passed to this external script are: 1191 * 1. A configuration file that has the specified configuration. 1192 * 1193 * We will embed the name of the interface in the configuration 1194 * file: ifcfg-ethx (where ethx is the interface name). 1195 * 1196 * The information provided here may be more than what is needed 1197 * in a given distro to configure the interface and so are free 1198 * ignore information that may not be relevant. 1199 * 1200 * Here is the format of the ip configuration file: 1201 * 1202 * HWADDR=macaddr 1203 * DEVICE=interface name 1204 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured 1205 * or "none" if no boot-time protocol should be used) 1206 * 1207 * IPADDR0=ipaddr1 1208 * IPADDR1=ipaddr2 1209 * IPADDRx=ipaddry (where y = x + 1) 1210 * 1211 * NETMASK0=netmask1 1212 * NETMASKx=netmasky (where y = x + 1) 1213 * 1214 * GATEWAY=ipaddr1 1215 * GATEWAYx=ipaddry (where y = x + 1) 1216 * 1217 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc) 1218 * 1219 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be 1220 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as 1221 * IPV6NETMASK. 1222 * 1223 * The host can specify multiple ipv4 and ipv6 addresses to be 1224 * configured for the interface. Furthermore, the configuration 1225 * needs to be persistent. A subsequent GET call on the interface 1226 * is expected to return the configuration that is set via the SET 1227 * call. 1228 */ 1229 1230 snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC, 1231 "/ifcfg-", if_name); 1232 1233 file = fopen(if_file, "w"); 1234 1235 if (file == NULL) { 1236 syslog(LOG_ERR, "Failed to open config file; error: %d %s", 1237 errno, strerror(errno)); 1238 return HV_E_FAIL; 1239 } 1240 1241 /* 1242 * First write out the MAC address. 1243 */ 1244 1245 mac_addr = kvp_if_name_to_mac(if_name); 1246 if (mac_addr == NULL) { 1247 error = HV_E_FAIL; 1248 goto setval_error; 1249 } 1250 1251 error = kvp_write_file(file, "HWADDR", "", mac_addr); 1252 free(mac_addr); 1253 if (error) 1254 goto setval_error; 1255 1256 error = kvp_write_file(file, "DEVICE", "", if_name); 1257 if (error) 1258 goto setval_error; 1259 1260 /* 1261 * The dhcp_enabled flag is only for IPv4. In the case the host only 1262 * injects an IPv6 address, the flag is true, but we still need to 1263 * proceed to parse and pass the IPv6 information to the 1264 * disto-specific script hv_set_ifconfig. 1265 */ 1266 if (new_val->dhcp_enabled) { 1267 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp"); 1268 if (error) 1269 goto setval_error; 1270 1271 } else { 1272 error = kvp_write_file(file, "BOOTPROTO", "", "none"); 1273 if (error) 1274 goto setval_error; 1275 } 1276 1277 /* 1278 * Write the configuration for ipaddress, netmask, gateway and 1279 * name servers. 1280 */ 1281 1282 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR); 1283 if (error) 1284 goto setval_error; 1285 1286 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK); 1287 if (error) 1288 goto setval_error; 1289 1290 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY); 1291 if (error) 1292 goto setval_error; 1293 1294 error = process_ip_string(file, (char *)new_val->dns_addr, DNS); 1295 if (error) 1296 goto setval_error; 1297 1298 fclose(file); 1299 1300 /* 1301 * Now that we have populated the configuration file, 1302 * invoke the external script to do its magic. 1303 */ 1304 1305 str_len = snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s", 1306 "hv_set_ifconfig", if_file); 1307 /* 1308 * This is a little overcautious, but it's necessary to suppress some 1309 * false warnings from gcc 8.0.1. 1310 */ 1311 if (str_len <= 0 || (unsigned int)str_len >= sizeof(cmd)) { 1312 syslog(LOG_ERR, "Cmd '%s' (len=%d) may be too long", 1313 cmd, str_len); 1314 return HV_E_FAIL; 1315 } 1316 1317 if (system(cmd)) { 1318 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s", 1319 cmd, errno, strerror(errno)); 1320 return HV_E_FAIL; 1321 } 1322 return 0; 1323 1324setval_error: 1325 syslog(LOG_ERR, "Failed to write config file"); 1326 fclose(file); 1327 return error; 1328} 1329 1330 1331static void 1332kvp_get_domain_name(char *buffer, int length) 1333{ 1334 struct addrinfo hints, *info ; 1335 int error = 0; 1336 1337 gethostname(buffer, length); 1338 memset(&hints, 0, sizeof(hints)); 1339 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */ 1340 hints.ai_socktype = SOCK_STREAM; 1341 hints.ai_flags = AI_CANONNAME; 1342 1343 error = getaddrinfo(buffer, NULL, &hints, &info); 1344 if (error != 0) { 1345 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s", 1346 error, gai_strerror(error)); 1347 return; 1348 } 1349 snprintf(buffer, length, "%s", info->ai_canonname); 1350 freeaddrinfo(info); 1351} 1352 1353void print_usage(char *argv[]) 1354{ 1355 fprintf(stderr, "Usage: %s [options]\n" 1356 "Options are:\n" 1357 " -n, --no-daemon stay in foreground, don't daemonize\n" 1358 " -h, --help print this help\n", argv[0]); 1359} 1360 1361int main(int argc, char *argv[]) 1362{ 1363 int kvp_fd = -1, len; 1364 int error; 1365 struct pollfd pfd; 1366 char *p; 1367 struct hv_kvp_msg hv_msg[1]; 1368 char *key_value; 1369 char *key_name; 1370 int op; 1371 int pool; 1372 char *if_name; 1373 struct hv_kvp_ipaddr_value *kvp_ip_val; 1374 int daemonize = 1, long_index = 0, opt; 1375 1376 static struct option long_options[] = { 1377 {"help", no_argument, 0, 'h' }, 1378 {"no-daemon", no_argument, 0, 'n' }, 1379 {0, 0, 0, 0 } 1380 }; 1381 1382 while ((opt = getopt_long(argc, argv, "hn", long_options, 1383 &long_index)) != -1) { 1384 switch (opt) { 1385 case 'n': 1386 daemonize = 0; 1387 break; 1388 case 'h': 1389 print_usage(argv); 1390 exit(0); 1391 default: 1392 print_usage(argv); 1393 exit(EXIT_FAILURE); 1394 } 1395 } 1396 1397 if (daemonize && daemon(1, 0)) 1398 return 1; 1399 1400 openlog("KVP", 0, LOG_USER); 1401 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid()); 1402 1403 /* 1404 * Retrieve OS release information. 1405 */ 1406 kvp_get_os_info(); 1407 /* 1408 * Cache Fully Qualified Domain Name because getaddrinfo takes an 1409 * unpredictable amount of time to finish. 1410 */ 1411 kvp_get_domain_name(full_domain_name, sizeof(full_domain_name)); 1412 1413 if (kvp_file_init()) { 1414 syslog(LOG_ERR, "Failed to initialize the pools"); 1415 exit(EXIT_FAILURE); 1416 } 1417 1418reopen_kvp_fd: 1419 if (kvp_fd != -1) 1420 close(kvp_fd); 1421 in_hand_shake = 1; 1422 kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC); 1423 1424 if (kvp_fd < 0) { 1425 syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s", 1426 errno, strerror(errno)); 1427 exit(EXIT_FAILURE); 1428 } 1429 1430 /* 1431 * Register ourselves with the kernel. 1432 */ 1433 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1; 1434 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg)); 1435 if (len != sizeof(struct hv_kvp_msg)) { 1436 syslog(LOG_ERR, "registration to kernel failed; error: %d %s", 1437 errno, strerror(errno)); 1438 close(kvp_fd); 1439 exit(EXIT_FAILURE); 1440 } 1441 1442 pfd.fd = kvp_fd; 1443 1444 while (1) { 1445 pfd.events = POLLIN; 1446 pfd.revents = 0; 1447 1448 if (poll(&pfd, 1, -1) < 0) { 1449 syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno)); 1450 if (errno == EINVAL) { 1451 close(kvp_fd); 1452 exit(EXIT_FAILURE); 1453 } 1454 else 1455 continue; 1456 } 1457 1458 len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg)); 1459 1460 if (len != sizeof(struct hv_kvp_msg)) { 1461 syslog(LOG_ERR, "read failed; error:%d %s", 1462 errno, strerror(errno)); 1463 goto reopen_kvp_fd; 1464 } 1465 1466 /* 1467 * We will use the KVP header information to pass back 1468 * the error from this daemon. So, first copy the state 1469 * and set the error code to success. 1470 */ 1471 op = hv_msg->kvp_hdr.operation; 1472 pool = hv_msg->kvp_hdr.pool; 1473 hv_msg->error = HV_S_OK; 1474 1475 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) { 1476 /* 1477 * Driver is registering with us; stash away the version 1478 * information. 1479 */ 1480 in_hand_shake = 0; 1481 p = (char *)hv_msg->body.kvp_register.version; 1482 lic_version = malloc(strlen(p) + 1); 1483 if (lic_version) { 1484 strcpy(lic_version, p); 1485 syslog(LOG_INFO, "KVP LIC Version: %s", 1486 lic_version); 1487 } else { 1488 syslog(LOG_ERR, "malloc failed"); 1489 } 1490 continue; 1491 } 1492 1493 switch (op) { 1494 case KVP_OP_GET_IP_INFO: 1495 kvp_ip_val = &hv_msg->body.kvp_ip_val; 1496 1497 error = kvp_mac_to_ip(kvp_ip_val); 1498 1499 if (error) 1500 hv_msg->error = error; 1501 1502 break; 1503 1504 case KVP_OP_SET_IP_INFO: 1505 kvp_ip_val = &hv_msg->body.kvp_ip_val; 1506 if_name = kvp_get_if_name( 1507 (char *)kvp_ip_val->adapter_id); 1508 if (if_name == NULL) { 1509 /* 1510 * We could not map the guid to an 1511 * interface name; return error. 1512 */ 1513 hv_msg->error = HV_GUID_NOTFOUND; 1514 break; 1515 } 1516 error = kvp_set_ip_info(if_name, kvp_ip_val); 1517 if (error) 1518 hv_msg->error = error; 1519 1520 free(if_name); 1521 break; 1522 1523 case KVP_OP_SET: 1524 if (kvp_key_add_or_modify(pool, 1525 hv_msg->body.kvp_set.data.key, 1526 hv_msg->body.kvp_set.data.key_size, 1527 hv_msg->body.kvp_set.data.value, 1528 hv_msg->body.kvp_set.data.value_size)) 1529 hv_msg->error = HV_S_CONT; 1530 break; 1531 1532 case KVP_OP_GET: 1533 if (kvp_get_value(pool, 1534 hv_msg->body.kvp_set.data.key, 1535 hv_msg->body.kvp_set.data.key_size, 1536 hv_msg->body.kvp_set.data.value, 1537 hv_msg->body.kvp_set.data.value_size)) 1538 hv_msg->error = HV_S_CONT; 1539 break; 1540 1541 case KVP_OP_DELETE: 1542 if (kvp_key_delete(pool, 1543 hv_msg->body.kvp_delete.key, 1544 hv_msg->body.kvp_delete.key_size)) 1545 hv_msg->error = HV_S_CONT; 1546 break; 1547 1548 default: 1549 break; 1550 } 1551 1552 if (op != KVP_OP_ENUMERATE) 1553 goto kvp_done; 1554 1555 /* 1556 * If the pool is KVP_POOL_AUTO, dynamically generate 1557 * both the key and the value; if not read from the 1558 * appropriate pool. 1559 */ 1560 if (pool != KVP_POOL_AUTO) { 1561 if (kvp_pool_enumerate(pool, 1562 hv_msg->body.kvp_enum_data.index, 1563 hv_msg->body.kvp_enum_data.data.key, 1564 HV_KVP_EXCHANGE_MAX_KEY_SIZE, 1565 hv_msg->body.kvp_enum_data.data.value, 1566 HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) 1567 hv_msg->error = HV_S_CONT; 1568 goto kvp_done; 1569 } 1570 1571 key_name = (char *)hv_msg->body.kvp_enum_data.data.key; 1572 key_value = (char *)hv_msg->body.kvp_enum_data.data.value; 1573 1574 switch (hv_msg->body.kvp_enum_data.index) { 1575 case FullyQualifiedDomainName: 1576 strcpy(key_value, full_domain_name); 1577 strcpy(key_name, "FullyQualifiedDomainName"); 1578 break; 1579 case IntegrationServicesVersion: 1580 strcpy(key_name, "IntegrationServicesVersion"); 1581 strcpy(key_value, lic_version); 1582 break; 1583 case NetworkAddressIPv4: 1584 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE, 1585 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); 1586 strcpy(key_name, "NetworkAddressIPv4"); 1587 break; 1588 case NetworkAddressIPv6: 1589 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE, 1590 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); 1591 strcpy(key_name, "NetworkAddressIPv6"); 1592 break; 1593 case OSBuildNumber: 1594 strcpy(key_value, os_build); 1595 strcpy(key_name, "OSBuildNumber"); 1596 break; 1597 case OSName: 1598 strcpy(key_value, os_name); 1599 strcpy(key_name, "OSName"); 1600 break; 1601 case OSMajorVersion: 1602 strcpy(key_value, os_major); 1603 strcpy(key_name, "OSMajorVersion"); 1604 break; 1605 case OSMinorVersion: 1606 strcpy(key_value, os_minor); 1607 strcpy(key_name, "OSMinorVersion"); 1608 break; 1609 case OSVersion: 1610 strcpy(key_value, os_version); 1611 strcpy(key_name, "OSVersion"); 1612 break; 1613 case ProcessorArchitecture: 1614 strcpy(key_value, processor_arch); 1615 strcpy(key_name, "ProcessorArchitecture"); 1616 break; 1617 default: 1618 hv_msg->error = HV_S_CONT; 1619 break; 1620 } 1621 1622 /* 1623 * Send the value back to the kernel. Note: the write() may 1624 * return an error due to hibernation; we can ignore the error 1625 * by resetting the dev file, i.e. closing and re-opening it. 1626 */ 1627kvp_done: 1628 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg)); 1629 if (len != sizeof(struct hv_kvp_msg)) { 1630 syslog(LOG_ERR, "write failed; error: %d %s", errno, 1631 strerror(errno)); 1632 goto reopen_kvp_fd; 1633 } 1634 } 1635 1636 close(kvp_fd); 1637 exit(0); 1638} 1639