1 /*
2 * An implementation of key value pair (KVP) functionality for Linux.
3 *
4 *
5 * Copyright (C) 2010, Novell, Inc.
6 * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
16 * details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 */
23
24
25 #include <sys/poll.h>
26 #include <sys/utsname.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <unistd.h>
30 #include <string.h>
31 #include <ctype.h>
32 #include <errno.h>
33 #include <arpa/inet.h>
34 #include <linux/hyperv.h>
35 #include <ifaddrs.h>
36 #include <netdb.h>
37 #include <syslog.h>
38 #include <sys/stat.h>
39 #include <fcntl.h>
40 #include <dirent.h>
41 #include <net/if.h>
42 #include <limits.h>
43 #include <getopt.h>
44
45 /*
46 * KVP protocol: The user mode component first registers with the
47 * the kernel component. Subsequently, the kernel component requests, data
48 * for the specified keys. In response to this message the user mode component
49 * fills in the value corresponding to the specified key. We overload the
50 * sequence field in the cn_msg header to define our KVP message types.
51 *
52 * We use this infrastructure for also supporting queries from user mode
53 * application for state that may be maintained in the KVP kernel component.
54 *
55 */
56
57
58 enum key_index {
59 FullyQualifiedDomainName = 0,
60 IntegrationServicesVersion, /*This key is serviced in the kernel*/
61 NetworkAddressIPv4,
62 NetworkAddressIPv6,
63 OSBuildNumber,
64 OSName,
65 OSMajorVersion,
66 OSMinorVersion,
67 OSVersion,
68 ProcessorArchitecture
69 };
70
71
72 enum {
73 IPADDR = 0,
74 NETMASK,
75 GATEWAY,
76 DNS
77 };
78
79 static int in_hand_shake = 1;
80
81 static char *os_name = "";
82 static char *os_major = "";
83 static char *os_minor = "";
84 static char *processor_arch;
85 static char *os_build;
86 static char *os_version;
87 static char *lic_version = "Unknown version";
88 static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
89 static struct utsname uts_buf;
90
91 /*
92 * The location of the interface configuration file.
93 */
94
95 #define KVP_CONFIG_LOC "/var/lib/hyperv"
96
97 #ifndef KVP_SCRIPTS_PATH
98 #define KVP_SCRIPTS_PATH "/usr/libexec/hypervkvpd/"
99 #endif
100
101 #define KVP_NET_DIR "/sys/class/net/"
102
103 #define MAX_FILE_NAME 100
104 #define ENTRIES_PER_BLOCK 50
105
106 struct kvp_record {
107 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
108 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
109 };
110
111 struct kvp_file_state {
112 int fd;
113 int num_blocks;
114 struct kvp_record *records;
115 int num_records;
116 char fname[MAX_FILE_NAME];
117 };
118
119 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
120
121 static void kvp_acquire_lock(int pool)
122 {
123 struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
124 fl.l_pid = getpid();
125
126 if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
127 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
128 errno, strerror(errno));
129 exit(EXIT_FAILURE);
130 }
131 }
132
133 static void kvp_release_lock(int pool)
134 {
135 struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
136 fl.l_pid = getpid();
137
138 if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
139 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
140 errno, strerror(errno));
141 exit(EXIT_FAILURE);
142 }
143 }
144
145 static void kvp_update_file(int pool)
146 {
147 FILE *filep;
148
149 /*
150 * We are going to write our in-memory registry out to
151 * disk; acquire the lock first.
152 */
153 kvp_acquire_lock(pool);
154
155 filep = fopen(kvp_file_info[pool].fname, "we");
156 if (!filep) {
157 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
158 errno, strerror(errno));
159 kvp_release_lock(pool);
160 exit(EXIT_FAILURE);
161 }
162
163 fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record),
164 kvp_file_info[pool].num_records, filep);
165
166 if (ferror(filep) || fclose(filep)) {
167 kvp_release_lock(pool);
168 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
169 exit(EXIT_FAILURE);
170 }
171
172 kvp_release_lock(pool);
173 }
174
175 static void kvp_update_mem_state(int pool)
176 {
177 FILE *filep;
178 size_t records_read = 0;
179 struct kvp_record *record = kvp_file_info[pool].records;
180 struct kvp_record *readp;
181 int num_blocks = kvp_file_info[pool].num_blocks;
182 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
183
184 kvp_acquire_lock(pool);
185
186 filep = fopen(kvp_file_info[pool].fname, "re");
187 if (!filep) {
188 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
189 errno, strerror(errno));
190 kvp_release_lock(pool);
191 exit(EXIT_FAILURE);
192 }
193 for (;;) {
194 readp = &record[records_read];
195 records_read += fread(readp, sizeof(struct kvp_record),
196 ENTRIES_PER_BLOCK * num_blocks - 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
232 static 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
267 static 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) {
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
310 static 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
364 static 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
396 static 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
417 void 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 * http://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
504 kvp_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
540 done:
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
555 static 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
607 static 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
637
638 /*
639 * Retrieve the interface name given tha MAC address.
640 */
641
642 static char *kvp_mac_to_if_name(char *mac)
643 {
644 DIR *dir;
645 struct dirent *entry;
646 FILE *file;
647 char *p, *x;
648 char *if_name = NULL;
649 char buf[256];
650 char dev_id[PATH_MAX];
651 unsigned int i;
652
653 dir = opendir(KVP_NET_DIR);
654 if (dir == NULL)
655 return NULL;
656
657 while ((entry = readdir(dir)) != NULL) {
658 /*
659 * Set the state for the next pass.
660 */
661 snprintf(dev_id, sizeof(dev_id), "%s%s/address", KVP_NET_DIR,
662 entry->d_name);
663
664 file = fopen(dev_id, "r");
665 if (file == NULL)
666 continue;
667
668 p = fgets(buf, sizeof(buf), file);
669 if (p) {
670 x = strchr(p, '\n');
671 if (x)
672 *x = '\0';
673
674 for (i = 0; i < strlen(p); i++)
675 p[i] = toupper(p[i]);
676
677 if (!strcmp(p, mac)) {
678 /*
679 * Found the MAC match; return the interface
680 * name. The caller will free the memory.
681 */
682 if_name = strdup(entry->d_name);
683 fclose(file);
684 break;
685 }
686 }
687 fclose(file);
688 }
689
690 closedir(dir);
691 return if_name;
692 }
693
694
695 static void kvp_process_ipconfig_file(char *cmd,
696 char *config_buf, unsigned int len,
697 int element_size, int offset)
698 {
699 char buf[256];
700 char *p;
701 char *x;
702 FILE *file;
703
704 /*
705 * First execute the command.
706 */
707 file = popen(cmd, "r");
708 if (file == NULL)
709 return;
710
711 if (offset == 0)
712 memset(config_buf, 0, len);
713 while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
714 if (len < strlen(config_buf) + element_size + 1)
715 break;
716
717 x = strchr(p, '\n');
718 if (x)
719 *x = '\0';
720
721 strcat(config_buf, p);
722 strcat(config_buf, ";");
723 }
724 pclose(file);
725 }
726
727 static void kvp_get_ipconfig_info(char *if_name,
728 struct hv_kvp_ipaddr_value *buffer)
729 {
730 char cmd[512];
731 char dhcp_info[128];
732 char *p;
733 FILE *file;
734
735 /*
736 * Get the address of default gateway (ipv4).
737 */
738 sprintf(cmd, "%s %s", "ip route show dev", if_name);
739 strcat(cmd, " | awk '/default/ {print $3 }'");
740
741 /*
742 * Execute the command to gather gateway info.
743 */
744 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
745 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
746
747 /*
748 * Get the address of default gateway (ipv6).
749 */
750 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
751 strcat(cmd, " | awk '/default/ {print $3 }'");
752
753 /*
754 * Execute the command to gather gateway info (ipv6).
755 */
756 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
757 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
758
759
760 /*
761 * Gather the DNS state.
762 * Since there is no standard way to get this information
763 * across various distributions of interest; we just invoke
764 * an external script that needs to be ported across distros
765 * of interest.
766 *
767 * Following is the expected format of the information from the script:
768 *
769 * ipaddr1 (nameserver1)
770 * ipaddr2 (nameserver2)
771 * .
772 * .
773 */
774
775 sprintf(cmd, KVP_SCRIPTS_PATH "%s", "hv_get_dns_info");
776
777 /*
778 * Execute the command to gather DNS info.
779 */
780 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
781 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
782
783 /*
784 * Gather the DHCP state.
785 * We will gather this state by invoking an external script.
786 * The parameter to the script is the interface name.
787 * Here is the expected output:
788 *
789 * Enabled: DHCP enabled.
790 */
791
792 sprintf(cmd, KVP_SCRIPTS_PATH "%s %s", "hv_get_dhcp_info", if_name);
793
794 file = popen(cmd, "r");
795 if (file == NULL)
796 return;
797
798 p = fgets(dhcp_info, sizeof(dhcp_info), file);
799 if (p == NULL) {
800 pclose(file);
801 return;
802 }
803
804 if (!strncmp(p, "Enabled", 7))
805 buffer->dhcp_enabled = 1;
806 else
807 buffer->dhcp_enabled = 0;
808
809 pclose(file);
810 }
811
812
813 static unsigned int hweight32(unsigned int *w)
814 {
815 unsigned int res = *w - ((*w >> 1) & 0x55555555);
816 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
817 res = (res + (res >> 4)) & 0x0F0F0F0F;
818 res = res + (res >> 8);
819 return (res + (res >> 16)) & 0x000000FF;
820 }
821
822 static int kvp_process_ip_address(void *addrp,
823 int family, char *buffer,
824 int length, int *offset)
825 {
826 struct sockaddr_in *addr;
827 struct sockaddr_in6 *addr6;
828 int addr_length;
829 char tmp[50];
830 const char *str;
831
832 if (family == AF_INET) {
833 addr = (struct sockaddr_in *)addrp;
834 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
835 addr_length = INET_ADDRSTRLEN;
836 } else {
837 addr6 = (struct sockaddr_in6 *)addrp;
838 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
839 addr_length = INET6_ADDRSTRLEN;
840 }
841
842 if ((length - *offset) < addr_length + 2)
843 return HV_E_FAIL;
844 if (str == NULL) {
845 strcpy(buffer, "inet_ntop failed\n");
846 return HV_E_FAIL;
847 }
848 if (*offset == 0)
849 strcpy(buffer, tmp);
850 else {
851 strcat(buffer, ";");
852 strcat(buffer, tmp);
853 }
854
855 *offset += strlen(str) + 1;
856
857 return 0;
858 }
859
860 static int
861 kvp_get_ip_info(int family, char *if_name, int op,
862 void *out_buffer, unsigned int length)
863 {
864 struct ifaddrs *ifap;
865 struct ifaddrs *curp;
866 int offset = 0;
867 int sn_offset = 0;
868 int error = 0;
869 char *buffer;
870 struct hv_kvp_ipaddr_value *ip_buffer;
871 char cidr_mask[5]; /* /xyz */
872 int weight;
873 int i;
874 unsigned int *w;
875 char *sn_str;
876 struct sockaddr_in6 *addr6;
877
878 if (op == KVP_OP_ENUMERATE) {
879 buffer = out_buffer;
880 } else {
881 ip_buffer = out_buffer;
882 buffer = (char *)ip_buffer->ip_addr;
883 ip_buffer->addr_family = 0;
884 }
885 /*
886 * On entry into this function, the buffer is capable of holding the
887 * maximum key value.
888 */
889
890 if (getifaddrs(&ifap)) {
891 strcpy(buffer, "getifaddrs failed\n");
892 return HV_E_FAIL;
893 }
894
895 curp = ifap;
896 while (curp != NULL) {
897 if (curp->ifa_addr == NULL) {
898 curp = curp->ifa_next;
899 continue;
900 }
901
902 if ((if_name != NULL) &&
903 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
904 /*
905 * We want info about a specific interface;
906 * just continue.
907 */
908 curp = curp->ifa_next;
909 continue;
910 }
911
912 /*
913 * We only support two address families: AF_INET and AF_INET6.
914 * If a family value of 0 is specified, we collect both
915 * supported address families; if not we gather info on
916 * the specified address family.
917 */
918 if ((((family != 0) &&
919 (curp->ifa_addr->sa_family != family))) ||
920 (curp->ifa_flags & IFF_LOOPBACK)) {
921 curp = curp->ifa_next;
922 continue;
923 }
924 if ((curp->ifa_addr->sa_family != AF_INET) &&
925 (curp->ifa_addr->sa_family != AF_INET6)) {
926 curp = curp->ifa_next;
927 continue;
928 }
929
930 if (op == KVP_OP_GET_IP_INFO) {
931 /*
932 * Gather info other than the IP address.
933 * IP address info will be gathered later.
934 */
935 if (curp->ifa_addr->sa_family == AF_INET) {
936 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
937 /*
938 * Get subnet info.
939 */
940 error = kvp_process_ip_address(
941 curp->ifa_netmask,
942 AF_INET,
943 (char *)
944 ip_buffer->sub_net,
945 length,
946 &sn_offset);
947 if (error)
948 goto gather_ipaddr;
949 } else {
950 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
951
952 /*
953 * Get subnet info in CIDR format.
954 */
955 weight = 0;
956 sn_str = (char *)ip_buffer->sub_net;
957 addr6 = (struct sockaddr_in6 *)
958 curp->ifa_netmask;
959 w = addr6->sin6_addr.s6_addr32;
960
961 for (i = 0; i < 4; i++)
962 weight += hweight32(&w[i]);
963
964 sprintf(cidr_mask, "/%d", weight);
965 if (length < sn_offset + strlen(cidr_mask) + 1)
966 goto gather_ipaddr;
967
968 if (sn_offset == 0)
969 strcpy(sn_str, cidr_mask);
970 else {
971 strcat((char *)ip_buffer->sub_net, ";");
972 strcat(sn_str, cidr_mask);
973 }
974 sn_offset += strlen(sn_str) + 1;
975 }
976
977 /*
978 * Collect other ip related configuration info.
979 */
980
981 kvp_get_ipconfig_info(if_name, ip_buffer);
982 }
983
984 gather_ipaddr:
985 error = kvp_process_ip_address(curp->ifa_addr,
986 curp->ifa_addr->sa_family,
987 buffer,
988 length, &offset);
989 if (error)
990 goto getaddr_done;
991
992 curp = curp->ifa_next;
993 }
994
995 getaddr_done:
996 freeifaddrs(ifap);
997 return error;
998 }
999
1000
1001 static int expand_ipv6(char *addr, int type)
1002 {
1003 int ret;
1004 struct in6_addr v6_addr;
1005
1006 ret = inet_pton(AF_INET6, addr, &v6_addr);
1007
1008 if (ret != 1) {
1009 if (type == NETMASK)
1010 return 1;
1011 return 0;
1012 }
1013
1014 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1015 "%02x%02x:%02x%02x:%02x%02x",
1016 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1017 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1018 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1019 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1020 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1021 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1022 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1023 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1024
1025 return 1;
1026
1027 }
1028
1029 static int is_ipv4(char *addr)
1030 {
1031 int ret;
1032 struct in_addr ipv4_addr;
1033
1034 ret = inet_pton(AF_INET, addr, &ipv4_addr);
1035
1036 if (ret == 1)
1037 return 1;
1038 return 0;
1039 }
1040
1041 static int parse_ip_val_buffer(char *in_buf, int *offset,
1042 char *out_buf, int out_len)
1043 {
1044 char *x;
1045 char *start;
1046
1047 /*
1048 * in_buf has sequence of characters that are seperated by
1049 * the character ';'. The last sequence does not have the
1050 * terminating ";" character.
1051 */
1052 start = in_buf + *offset;
1053
1054 x = strchr(start, ';');
1055 if (x)
1056 *x = 0;
1057 else
1058 x = start + strlen(start);
1059
1060 if (strlen(start) != 0) {
1061 int i = 0;
1062 /*
1063 * Get rid of leading spaces.
1064 */
1065 while (start[i] == ' ')
1066 i++;
1067
1068 if ((x - start) <= out_len) {
1069 strcpy(out_buf, (start + i));
1070 *offset += (x - start) + 1;
1071 return 1;
1072 }
1073 }
1074 return 0;
1075 }
1076
1077 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1078 {
1079 int ret;
1080
1081 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1082
1083 if (ret < 0)
1084 return HV_E_FAIL;
1085
1086 return 0;
1087 }
1088
1089
1090 static int process_ip_string(FILE *f, char *ip_string, int type)
1091 {
1092 int error = 0;
1093 char addr[INET6_ADDRSTRLEN];
1094 int i = 0;
1095 int j = 0;
1096 char str[256];
1097 char sub_str[13];
1098 int offset = 0;
1099
1100 memset(addr, 0, sizeof(addr));
1101
1102 while (parse_ip_val_buffer(ip_string, &offset, addr,
1103 (MAX_IP_ADDR_SIZE * 2))) {
1104
1105 sub_str[0] = 0;
1106 if (is_ipv4(addr)) {
1107 switch (type) {
1108 case IPADDR:
1109 snprintf(str, sizeof(str), "%s", "IPADDR");
1110 break;
1111 case NETMASK:
1112 snprintf(str, sizeof(str), "%s", "NETMASK");
1113 break;
1114 case GATEWAY:
1115 snprintf(str, sizeof(str), "%s", "GATEWAY");
1116 break;
1117 case DNS:
1118 snprintf(str, sizeof(str), "%s", "DNS");
1119 break;
1120 }
1121
1122 if (type == DNS) {
1123 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1124 } else if (type == GATEWAY && i == 0) {
1125 ++i;
1126 } else {
1127 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1128 }
1129
1130
1131 } else if (expand_ipv6(addr, type)) {
1132 switch (type) {
1133 case IPADDR:
1134 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1135 break;
1136 case NETMASK:
1137 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1138 break;
1139 case GATEWAY:
1140 snprintf(str, sizeof(str), "%s",
1141 "IPV6_DEFAULTGW");
1142 break;
1143 case DNS:
1144 snprintf(str, sizeof(str), "%s", "DNS");
1145 break;
1146 }
1147
1148 if (type == DNS) {
1149 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1150 } else if (j == 0) {
1151 ++j;
1152 } else {
1153 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1154 }
1155 } else {
1156 return HV_INVALIDARG;
1157 }
1158
1159 error = kvp_write_file(f, str, sub_str, addr);
1160 if (error)
1161 return error;
1162 memset(addr, 0, sizeof(addr));
1163 }
1164
1165 return 0;
1166 }
1167
1168 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1169 {
1170 int error = 0;
1171 char if_file[PATH_MAX];
1172 FILE *file;
1173 char cmd[PATH_MAX];
1174 char *mac_addr;
1175
1176 /*
1177 * Set the configuration for the specified interface with
1178 * the information provided. Since there is no standard
1179 * way to configure an interface, we will have an external
1180 * script that does the job of configuring the interface and
1181 * flushing the configuration.
1182 *
1183 * The parameters passed to this external script are:
1184 * 1. A configuration file that has the specified configuration.
1185 *
1186 * We will embed the name of the interface in the configuration
1187 * file: ifcfg-ethx (where ethx is the interface name).
1188 *
1189 * The information provided here may be more than what is needed
1190 * in a given distro to configure the interface and so are free
1191 * ignore information that may not be relevant.
1192 *
1193 * Here is the format of the ip configuration file:
1194 *
1195 * HWADDR=macaddr
1196 * DEVICE=interface name
1197 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1198 * or "none" if no boot-time protocol should be used)
1199 *
1200 * IPADDR0=ipaddr1
1201 * IPADDR1=ipaddr2
1202 * IPADDRx=ipaddry (where y = x + 1)
1203 *
1204 * NETMASK0=netmask1
1205 * NETMASKx=netmasky (where y = x + 1)
1206 *
1207 * GATEWAY=ipaddr1
1208 * GATEWAYx=ipaddry (where y = x + 1)
1209 *
1210 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1211 *
1212 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1213 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1214 * IPV6NETMASK.
1215 *
1216 * The host can specify multiple ipv4 and ipv6 addresses to be
1217 * configured for the interface. Furthermore, the configuration
1218 * needs to be persistent. A subsequent GET call on the interface
1219 * is expected to return the configuration that is set via the SET
1220 * call.
1221 */
1222
1223 snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1224 "/ifcfg-", if_name);
1225
1226 file = fopen(if_file, "w");
1227
1228 if (file == NULL) {
1229 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1230 errno, strerror(errno));
1231 return HV_E_FAIL;
1232 }
1233
1234 /*
1235 * First write out the MAC address.
1236 */
1237
1238 mac_addr = kvp_if_name_to_mac(if_name);
1239 if (mac_addr == NULL) {
1240 error = HV_E_FAIL;
1241 goto setval_error;
1242 }
1243
1244 error = kvp_write_file(file, "HWADDR", "", mac_addr);
1245 free(mac_addr);
1246 if (error)
1247 goto setval_error;
1248
1249 error = kvp_write_file(file, "DEVICE", "", if_name);
1250 if (error)
1251 goto setval_error;
1252
1253 /*
1254 * The dhcp_enabled flag is only for IPv4. In the case the host only
1255 * injects an IPv6 address, the flag is true, but we still need to
1256 * proceed to parse and pass the IPv6 information to the
1257 * disto-specific script hv_set_ifconfig.
1258 */
1259 if (new_val->dhcp_enabled) {
1260 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1261 if (error)
1262 goto setval_error;
1263
1264 } else {
1265 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1266 if (error)
1267 goto setval_error;
1268 }
1269
1270 /*
1271 * Write the configuration for ipaddress, netmask, gateway and
1272 * name servers.
1273 */
1274
1275 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1276 if (error)
1277 goto setval_error;
1278
1279 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1280 if (error)
1281 goto setval_error;
1282
1283 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1284 if (error)
1285 goto setval_error;
1286
1287 error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1288 if (error)
1289 goto setval_error;
1290
1291 fclose(file);
1292
1293 /*
1294 * Now that we have populated the configuration file,
1295 * invoke the external script to do its magic.
1296 */
1297
1298 snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s",
1299 "hv_set_ifconfig", if_file);
1300 if (system(cmd)) {
1301 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1302 cmd, errno, strerror(errno));
1303 return HV_E_FAIL;
1304 }
1305 return 0;
1306
1307 setval_error:
1308 syslog(LOG_ERR, "Failed to write config file");
1309 fclose(file);
1310 return error;
1311 }
1312
1313
1314 static void
1315 kvp_get_domain_name(char *buffer, int length)
1316 {
1317 struct addrinfo hints, *info ;
1318 int error = 0;
1319
1320 gethostname(buffer, length);
1321 memset(&hints, 0, sizeof(hints));
1322 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1323 hints.ai_socktype = SOCK_STREAM;
1324 hints.ai_flags = AI_CANONNAME;
1325
1326 error = getaddrinfo(buffer, NULL, &hints, &info);
1327 if (error != 0) {
1328 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1329 error, gai_strerror(error));
1330 return;
1331 }
1332 snprintf(buffer, length, "%s", info->ai_canonname);
1333 freeaddrinfo(info);
1334 }
1335
1336 void print_usage(char *argv[])
1337 {
1338 fprintf(stderr, "Usage: %s [options]\n"
1339 "Options are:\n"
1340 " -n, --no-daemon stay in foreground, don't daemonize\n"
1341 " -h, --help print this help\n", argv[0]);
1342 }
1343
1344 int main(int argc, char *argv[])
1345 {
1346 int kvp_fd, len;
1347 int error;
1348 struct pollfd pfd;
1349 char *p;
1350 struct hv_kvp_msg hv_msg[1];
1351 char *key_value;
1352 char *key_name;
1353 int op;
1354 int pool;
1355 char *if_name;
1356 struct hv_kvp_ipaddr_value *kvp_ip_val;
1357 int daemonize = 1, long_index = 0, opt;
1358
1359 static struct option long_options[] = {
1360 {"help", no_argument, 0, 'h' },
1361 {"no-daemon", no_argument, 0, 'n' },
1362 {0, 0, 0, 0 }
1363 };
1364
1365 while ((opt = getopt_long(argc, argv, "hn", long_options,
1366 &long_index)) != -1) {
1367 switch (opt) {
1368 case 'n':
1369 daemonize = 0;
1370 break;
1371 case 'h':
1372 default:
1373 print_usage(argv);
1374 exit(EXIT_FAILURE);
1375 }
1376 }
1377
1378 if (daemonize && daemon(1, 0))
1379 return 1;
1380
1381 openlog("KVP", 0, LOG_USER);
1382 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1383
1384 kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC);
1385
1386 if (kvp_fd < 0) {
1387 syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s",
1388 errno, strerror(errno));
1389 exit(EXIT_FAILURE);
1390 }
1391
1392 /*
1393 * Retrieve OS release information.
1394 */
1395 kvp_get_os_info();
1396 /*
1397 * Cache Fully Qualified Domain Name because getaddrinfo takes an
1398 * unpredictable amount of time to finish.
1399 */
1400 kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
1401
1402 if (kvp_file_init()) {
1403 syslog(LOG_ERR, "Failed to initialize the pools");
1404 exit(EXIT_FAILURE);
1405 }
1406
1407 /*
1408 * Register ourselves with the kernel.
1409 */
1410 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1411 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1412 if (len != sizeof(struct hv_kvp_msg)) {
1413 syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
1414 errno, strerror(errno));
1415 close(kvp_fd);
1416 exit(EXIT_FAILURE);
1417 }
1418
1419 pfd.fd = kvp_fd;
1420
1421 while (1) {
1422 pfd.events = POLLIN;
1423 pfd.revents = 0;
1424
1425 if (poll(&pfd, 1, -1) < 0) {
1426 syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1427 if (errno == EINVAL) {
1428 close(kvp_fd);
1429 exit(EXIT_FAILURE);
1430 }
1431 else
1432 continue;
1433 }
1434
1435 len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1436
1437 if (len != sizeof(struct hv_kvp_msg)) {
1438 syslog(LOG_ERR, "read failed; error:%d %s",
1439 errno, strerror(errno));
1440
1441 close(kvp_fd);
1442 return EXIT_FAILURE;
1443 }
1444
1445 /*
1446 * We will use the KVP header information to pass back
1447 * the error from this daemon. So, first copy the state
1448 * and set the error code to success.
1449 */
1450 op = hv_msg->kvp_hdr.operation;
1451 pool = hv_msg->kvp_hdr.pool;
1452 hv_msg->error = HV_S_OK;
1453
1454 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1455 /*
1456 * Driver is registering with us; stash away the version
1457 * information.
1458 */
1459 in_hand_shake = 0;
1460 p = (char *)hv_msg->body.kvp_register.version;
1461 lic_version = malloc(strlen(p) + 1);
1462 if (lic_version) {
1463 strcpy(lic_version, p);
1464 syslog(LOG_INFO, "KVP LIC Version: %s",
1465 lic_version);
1466 } else {
1467 syslog(LOG_ERR, "malloc failed");
1468 }
1469 continue;
1470 }
1471
1472 switch (op) {
1473 case KVP_OP_GET_IP_INFO:
1474 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1475 if_name =
1476 kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1477
1478 if (if_name == NULL) {
1479 /*
1480 * We could not map the mac address to an
1481 * interface name; return error.
1482 */
1483 hv_msg->error = HV_E_FAIL;
1484 break;
1485 }
1486 error = kvp_get_ip_info(
1487 0, if_name, KVP_OP_GET_IP_INFO,
1488 kvp_ip_val,
1489 (MAX_IP_ADDR_SIZE * 2));
1490
1491 if (error)
1492 hv_msg->error = error;
1493
1494 free(if_name);
1495 break;
1496
1497 case KVP_OP_SET_IP_INFO:
1498 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1499 if_name = kvp_get_if_name(
1500 (char *)kvp_ip_val->adapter_id);
1501 if (if_name == NULL) {
1502 /*
1503 * We could not map the guid to an
1504 * interface name; return error.
1505 */
1506 hv_msg->error = HV_GUID_NOTFOUND;
1507 break;
1508 }
1509 error = kvp_set_ip_info(if_name, kvp_ip_val);
1510 if (error)
1511 hv_msg->error = error;
1512
1513 free(if_name);
1514 break;
1515
1516 case KVP_OP_SET:
1517 if (kvp_key_add_or_modify(pool,
1518 hv_msg->body.kvp_set.data.key,
1519 hv_msg->body.kvp_set.data.key_size,
1520 hv_msg->body.kvp_set.data.value,
1521 hv_msg->body.kvp_set.data.value_size))
1522 hv_msg->error = HV_S_CONT;
1523 break;
1524
1525 case KVP_OP_GET:
1526 if (kvp_get_value(pool,
1527 hv_msg->body.kvp_set.data.key,
1528 hv_msg->body.kvp_set.data.key_size,
1529 hv_msg->body.kvp_set.data.value,
1530 hv_msg->body.kvp_set.data.value_size))
1531 hv_msg->error = HV_S_CONT;
1532 break;
1533
1534 case KVP_OP_DELETE:
1535 if (kvp_key_delete(pool,
1536 hv_msg->body.kvp_delete.key,
1537 hv_msg->body.kvp_delete.key_size))
1538 hv_msg->error = HV_S_CONT;
1539 break;
1540
1541 default:
1542 break;
1543 }
1544
1545 if (op != KVP_OP_ENUMERATE)
1546 goto kvp_done;
1547
1548 /*
1549 * If the pool is KVP_POOL_AUTO, dynamically generate
1550 * both the key and the value; if not read from the
1551 * appropriate pool.
1552 */
1553 if (pool != KVP_POOL_AUTO) {
1554 if (kvp_pool_enumerate(pool,
1555 hv_msg->body.kvp_enum_data.index,
1556 hv_msg->body.kvp_enum_data.data.key,
1557 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1558 hv_msg->body.kvp_enum_data.data.value,
1559 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1560 hv_msg->error = HV_S_CONT;
1561 goto kvp_done;
1562 }
1563
1564 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1565 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1566
1567 switch (hv_msg->body.kvp_enum_data.index) {
1568 case FullyQualifiedDomainName:
1569 strcpy(key_value, full_domain_name);
1570 strcpy(key_name, "FullyQualifiedDomainName");
1571 break;
1572 case IntegrationServicesVersion:
1573 strcpy(key_name, "IntegrationServicesVersion");
1574 strcpy(key_value, lic_version);
1575 break;
1576 case NetworkAddressIPv4:
1577 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1578 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1579 strcpy(key_name, "NetworkAddressIPv4");
1580 break;
1581 case NetworkAddressIPv6:
1582 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1583 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1584 strcpy(key_name, "NetworkAddressIPv6");
1585 break;
1586 case OSBuildNumber:
1587 strcpy(key_value, os_build);
1588 strcpy(key_name, "OSBuildNumber");
1589 break;
1590 case OSName:
1591 strcpy(key_value, os_name);
1592 strcpy(key_name, "OSName");
1593 break;
1594 case OSMajorVersion:
1595 strcpy(key_value, os_major);
1596 strcpy(key_name, "OSMajorVersion");
1597 break;
1598 case OSMinorVersion:
1599 strcpy(key_value, os_minor);
1600 strcpy(key_name, "OSMinorVersion");
1601 break;
1602 case OSVersion:
1603 strcpy(key_value, os_version);
1604 strcpy(key_name, "OSVersion");
1605 break;
1606 case ProcessorArchitecture:
1607 strcpy(key_value, processor_arch);
1608 strcpy(key_name, "ProcessorArchitecture");
1609 break;
1610 default:
1611 hv_msg->error = HV_S_CONT;
1612 break;
1613 }
1614
1615 /* Send the value back to the kernel. */
1616 kvp_done:
1617 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1618 if (len != sizeof(struct hv_kvp_msg)) {
1619 syslog(LOG_ERR, "write failed; error: %d %s", errno,
1620 strerror(errno));
1621 exit(EXIT_FAILURE);
1622 }
1623 }
1624
1625 close(kvp_fd);
1626 exit(0);
1627 }
1628
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