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Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
[deliverable/linux.git] / 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/types.h>
26 #include <sys/socket.h>
27 #include <sys/poll.h>
28 #include <sys/utsname.h>
29 #include <linux/types.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33 #include <string.h>
34 #include <ctype.h>
35 #include <errno.h>
36 #include <arpa/inet.h>
37 #include <linux/connector.h>
38 #include <linux/hyperv.h>
39 #include <linux/netlink.h>
40 #include <ifaddrs.h>
41 #include <netdb.h>
42 #include <syslog.h>
43 #include <sys/stat.h>
44 #include <fcntl.h>
45 #include <dirent.h>
46 #include <net/if.h>
47
48 /*
49 * KVP protocol: The user mode component first registers with the
50 * the kernel component. Subsequently, the kernel component requests, data
51 * for the specified keys. In response to this message the user mode component
52 * fills in the value corresponding to the specified key. We overload the
53 * sequence field in the cn_msg header to define our KVP message types.
54 *
55 * We use this infrastructure for also supporting queries from user mode
56 * application for state that may be maintained in the KVP kernel component.
57 *
58 */
59
60
61 enum key_index {
62 FullyQualifiedDomainName = 0,
63 IntegrationServicesVersion, /*This key is serviced in the kernel*/
64 NetworkAddressIPv4,
65 NetworkAddressIPv6,
66 OSBuildNumber,
67 OSName,
68 OSMajorVersion,
69 OSMinorVersion,
70 OSVersion,
71 ProcessorArchitecture
72 };
73
74
75 enum {
76 IPADDR = 0,
77 NETMASK,
78 GATEWAY,
79 DNS
80 };
81
82 static char kvp_send_buffer[4096];
83 static char kvp_recv_buffer[4096 * 2];
84 static struct sockaddr_nl addr;
85 static int in_hand_shake = 1;
86
87 static char *os_name = "";
88 static char *os_major = "";
89 static char *os_minor = "";
90 static char *processor_arch;
91 static char *os_build;
92 static char *os_version;
93 static char *lic_version = "Unknown version";
94 static struct utsname uts_buf;
95
96 /*
97 * The location of the interface configuration file.
98 */
99
100 #define KVP_CONFIG_LOC "/var/lib/hyperv"
101
102 #define MAX_FILE_NAME 100
103 #define ENTRIES_PER_BLOCK 50
104
105 #ifndef SOL_NETLINK
106 #define SOL_NETLINK 270
107 #endif
108
109 struct kvp_record {
110 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
111 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
112 };
113
114 struct kvp_file_state {
115 int fd;
116 int num_blocks;
117 struct kvp_record *records;
118 int num_records;
119 char fname[MAX_FILE_NAME];
120 };
121
122 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
123
124 static void kvp_acquire_lock(int pool)
125 {
126 struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
127 fl.l_pid = getpid();
128
129 if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
130 syslog(LOG_ERR, "Failed to acquire the lock pool: %d", pool);
131 exit(EXIT_FAILURE);
132 }
133 }
134
135 static void kvp_release_lock(int pool)
136 {
137 struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
138 fl.l_pid = getpid();
139
140 if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
141 perror("fcntl");
142 syslog(LOG_ERR, "Failed to release the lock pool: %d", pool);
143 exit(EXIT_FAILURE);
144 }
145 }
146
147 static void kvp_update_file(int pool)
148 {
149 FILE *filep;
150 size_t bytes_written;
151
152 /*
153 * We are going to write our in-memory registry out to
154 * disk; acquire the lock first.
155 */
156 kvp_acquire_lock(pool);
157
158 filep = fopen(kvp_file_info[pool].fname, "we");
159 if (!filep) {
160 kvp_release_lock(pool);
161 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
162 exit(EXIT_FAILURE);
163 }
164
165 bytes_written = fwrite(kvp_file_info[pool].records,
166 sizeof(struct kvp_record),
167 kvp_file_info[pool].num_records, filep);
168
169 if (ferror(filep) || fclose(filep)) {
170 kvp_release_lock(pool);
171 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
172 exit(EXIT_FAILURE);
173 }
174
175 kvp_release_lock(pool);
176 }
177
178 static void kvp_update_mem_state(int pool)
179 {
180 FILE *filep;
181 size_t records_read = 0;
182 struct kvp_record *record = kvp_file_info[pool].records;
183 struct kvp_record *readp;
184 int num_blocks = kvp_file_info[pool].num_blocks;
185 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
186
187 kvp_acquire_lock(pool);
188
189 filep = fopen(kvp_file_info[pool].fname, "re");
190 if (!filep) {
191 kvp_release_lock(pool);
192 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
193 exit(EXIT_FAILURE);
194 }
195 for (;;) {
196 readp = &record[records_read];
197 records_read += fread(readp, sizeof(struct kvp_record),
198 ENTRIES_PER_BLOCK * num_blocks,
199 filep);
200
201 if (ferror(filep)) {
202 syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
203 exit(EXIT_FAILURE);
204 }
205
206 if (!feof(filep)) {
207 /*
208 * We have more data to read.
209 */
210 num_blocks++;
211 record = realloc(record, alloc_unit * num_blocks);
212
213 if (record == NULL) {
214 syslog(LOG_ERR, "malloc failed");
215 exit(EXIT_FAILURE);
216 }
217 continue;
218 }
219 break;
220 }
221
222 kvp_file_info[pool].num_blocks = num_blocks;
223 kvp_file_info[pool].records = record;
224 kvp_file_info[pool].num_records = records_read;
225
226 fclose(filep);
227 kvp_release_lock(pool);
228 }
229 static int kvp_file_init(void)
230 {
231 int fd;
232 FILE *filep;
233 size_t records_read;
234 char *fname;
235 struct kvp_record *record;
236 struct kvp_record *readp;
237 int num_blocks;
238 int i;
239 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
240
241 if (access(KVP_CONFIG_LOC, F_OK)) {
242 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
243 syslog(LOG_ERR, " Failed to create %s", KVP_CONFIG_LOC);
244 exit(EXIT_FAILURE);
245 }
246 }
247
248 for (i = 0; i < KVP_POOL_COUNT; i++) {
249 fname = kvp_file_info[i].fname;
250 records_read = 0;
251 num_blocks = 1;
252 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
253 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
254
255 if (fd == -1)
256 return 1;
257
258
259 filep = fopen(fname, "re");
260 if (!filep)
261 return 1;
262
263 record = malloc(alloc_unit * num_blocks);
264 if (record == NULL) {
265 fclose(filep);
266 return 1;
267 }
268 for (;;) {
269 readp = &record[records_read];
270 records_read += fread(readp, sizeof(struct kvp_record),
271 ENTRIES_PER_BLOCK,
272 filep);
273
274 if (ferror(filep)) {
275 syslog(LOG_ERR, "Failed to read file, pool: %d",
276 i);
277 exit(EXIT_FAILURE);
278 }
279
280 if (!feof(filep)) {
281 /*
282 * We have more data to read.
283 */
284 num_blocks++;
285 record = realloc(record, alloc_unit *
286 num_blocks);
287 if (record == NULL) {
288 fclose(filep);
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 char *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 char *key, int key_size, const char *value,
350 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 char *key, int key_size, char *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, char *key, int key_size,
436 char *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 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 int i;
697
698 dir = opendir(kvp_net_dir);
699 if (dir == NULL)
700 return NULL;
701
702 snprintf(dev_id, sizeof(dev_id), 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, 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 *x = '\0';
769 strcat(config_buf, p);
770 strcat(config_buf, ";");
771 }
772 pclose(file);
773 }
774
775 static void kvp_get_ipconfig_info(char *if_name,
776 struct hv_kvp_ipaddr_value *buffer)
777 {
778 char cmd[512];
779 char dhcp_info[128];
780 char *p;
781 FILE *file;
782
783 /*
784 * Get the address of default gateway (ipv4).
785 */
786 sprintf(cmd, "%s %s", "ip route show dev", if_name);
787 strcat(cmd, " | awk '/default/ {print $3 }'");
788
789 /*
790 * Execute the command to gather gateway info.
791 */
792 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
793 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
794
795 /*
796 * Get the address of default gateway (ipv6).
797 */
798 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
799 strcat(cmd, " | awk '/default/ {print $3 }'");
800
801 /*
802 * Execute the command to gather gateway info (ipv6).
803 */
804 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
805 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
806
807
808 /*
809 * Gather the DNS state.
810 * Since there is no standard way to get this information
811 * across various distributions of interest; we just invoke
812 * an external script that needs to be ported across distros
813 * of interest.
814 *
815 * Following is the expected format of the information from the script:
816 *
817 * ipaddr1 (nameserver1)
818 * ipaddr2 (nameserver2)
819 * .
820 * .
821 */
822
823 sprintf(cmd, "%s", "hv_get_dns_info");
824
825 /*
826 * Execute the command to gather DNS info.
827 */
828 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
829 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
830
831 /*
832 * Gather the DHCP state.
833 * We will gather this state by invoking an external script.
834 * The parameter to the script is the interface name.
835 * Here is the expected output:
836 *
837 * Enabled: DHCP enabled.
838 */
839
840 sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
841
842 file = popen(cmd, "r");
843 if (file == NULL)
844 return;
845
846 p = fgets(dhcp_info, sizeof(dhcp_info), file);
847 if (p == NULL) {
848 pclose(file);
849 return;
850 }
851
852 if (!strncmp(p, "Enabled", 7))
853 buffer->dhcp_enabled = 1;
854 else
855 buffer->dhcp_enabled = 0;
856
857 pclose(file);
858 }
859
860
861 static unsigned int hweight32(unsigned int *w)
862 {
863 unsigned int res = *w - ((*w >> 1) & 0x55555555);
864 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
865 res = (res + (res >> 4)) & 0x0F0F0F0F;
866 res = res + (res >> 8);
867 return (res + (res >> 16)) & 0x000000FF;
868 }
869
870 static int kvp_process_ip_address(void *addrp,
871 int family, char *buffer,
872 int length, int *offset)
873 {
874 struct sockaddr_in *addr;
875 struct sockaddr_in6 *addr6;
876 int addr_length;
877 char tmp[50];
878 const char *str;
879
880 if (family == AF_INET) {
881 addr = (struct sockaddr_in *)addrp;
882 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
883 addr_length = INET_ADDRSTRLEN;
884 } else {
885 addr6 = (struct sockaddr_in6 *)addrp;
886 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
887 addr_length = INET6_ADDRSTRLEN;
888 }
889
890 if ((length - *offset) < addr_length + 2)
891 return HV_E_FAIL;
892 if (str == NULL) {
893 strcpy(buffer, "inet_ntop failed\n");
894 return HV_E_FAIL;
895 }
896 if (*offset == 0)
897 strcpy(buffer, tmp);
898 else {
899 strcat(buffer, ";");
900 strcat(buffer, tmp);
901 }
902
903 *offset += strlen(str) + 1;
904
905 return 0;
906 }
907
908 static int
909 kvp_get_ip_info(int family, char *if_name, int op,
910 void *out_buffer, int length)
911 {
912 struct ifaddrs *ifap;
913 struct ifaddrs *curp;
914 int offset = 0;
915 int sn_offset = 0;
916 int error = 0;
917 char *buffer;
918 struct hv_kvp_ipaddr_value *ip_buffer;
919 char cidr_mask[5]; /* /xyz */
920 int weight;
921 int i;
922 unsigned int *w;
923 char *sn_str;
924 struct sockaddr_in6 *addr6;
925
926 if (op == KVP_OP_ENUMERATE) {
927 buffer = out_buffer;
928 } else {
929 ip_buffer = out_buffer;
930 buffer = (char *)ip_buffer->ip_addr;
931 ip_buffer->addr_family = 0;
932 }
933 /*
934 * On entry into this function, the buffer is capable of holding the
935 * maximum key value.
936 */
937
938 if (getifaddrs(&ifap)) {
939 strcpy(buffer, "getifaddrs failed\n");
940 return HV_E_FAIL;
941 }
942
943 curp = ifap;
944 while (curp != NULL) {
945 if (curp->ifa_addr == NULL) {
946 curp = curp->ifa_next;
947 continue;
948 }
949
950 if ((if_name != NULL) &&
951 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
952 /*
953 * We want info about a specific interface;
954 * just continue.
955 */
956 curp = curp->ifa_next;
957 continue;
958 }
959
960 /*
961 * We only support two address families: AF_INET and AF_INET6.
962 * If a family value of 0 is specified, we collect both
963 * supported address families; if not we gather info on
964 * the specified address family.
965 */
966 if ((((family != 0) &&
967 (curp->ifa_addr->sa_family != family))) ||
968 (curp->ifa_flags & IFF_LOOPBACK)) {
969 curp = curp->ifa_next;
970 continue;
971 }
972 if ((curp->ifa_addr->sa_family != AF_INET) &&
973 (curp->ifa_addr->sa_family != AF_INET6)) {
974 curp = curp->ifa_next;
975 continue;
976 }
977
978 if (op == KVP_OP_GET_IP_INFO) {
979 /*
980 * Gather info other than the IP address.
981 * IP address info will be gathered later.
982 */
983 if (curp->ifa_addr->sa_family == AF_INET) {
984 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
985 /*
986 * Get subnet info.
987 */
988 error = kvp_process_ip_address(
989 curp->ifa_netmask,
990 AF_INET,
991 (char *)
992 ip_buffer->sub_net,
993 length,
994 &sn_offset);
995 if (error)
996 goto gather_ipaddr;
997 } else {
998 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
999
1000 /*
1001 * Get subnet info in CIDR format.
1002 */
1003 weight = 0;
1004 sn_str = (char *)ip_buffer->sub_net;
1005 addr6 = (struct sockaddr_in6 *)
1006 curp->ifa_netmask;
1007 w = addr6->sin6_addr.s6_addr32;
1008
1009 for (i = 0; i < 4; i++)
1010 weight += hweight32(&w[i]);
1011
1012 sprintf(cidr_mask, "/%d", weight);
1013 if ((length - sn_offset) <
1014 (strlen(cidr_mask) + 1))
1015 goto gather_ipaddr;
1016
1017 if (sn_offset == 0)
1018 strcpy(sn_str, cidr_mask);
1019 else
1020 strcat(sn_str, cidr_mask);
1021 strcat((char *)ip_buffer->sub_net, ";");
1022 sn_offset += strlen(sn_str) + 1;
1023 }
1024
1025 /*
1026 * Collect other ip related configuration info.
1027 */
1028
1029 kvp_get_ipconfig_info(if_name, ip_buffer);
1030 }
1031
1032 gather_ipaddr:
1033 error = kvp_process_ip_address(curp->ifa_addr,
1034 curp->ifa_addr->sa_family,
1035 buffer,
1036 length, &offset);
1037 if (error)
1038 goto getaddr_done;
1039
1040 curp = curp->ifa_next;
1041 }
1042
1043 getaddr_done:
1044 freeifaddrs(ifap);
1045 return error;
1046 }
1047
1048
1049 static int expand_ipv6(char *addr, int type)
1050 {
1051 int ret;
1052 struct in6_addr v6_addr;
1053
1054 ret = inet_pton(AF_INET6, addr, &v6_addr);
1055
1056 if (ret != 1) {
1057 if (type == NETMASK)
1058 return 1;
1059 return 0;
1060 }
1061
1062 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1063 "%02x%02x:%02x%02x:%02x%02x",
1064 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1065 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1066 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1067 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1068 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1069 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1070 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1071 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1072
1073 return 1;
1074
1075 }
1076
1077 static int is_ipv4(char *addr)
1078 {
1079 int ret;
1080 struct in_addr ipv4_addr;
1081
1082 ret = inet_pton(AF_INET, addr, &ipv4_addr);
1083
1084 if (ret == 1)
1085 return 1;
1086 return 0;
1087 }
1088
1089 static int parse_ip_val_buffer(char *in_buf, int *offset,
1090 char *out_buf, int out_len)
1091 {
1092 char *x;
1093 char *start;
1094
1095 /*
1096 * in_buf has sequence of characters that are seperated by
1097 * the character ';'. The last sequence does not have the
1098 * terminating ";" character.
1099 */
1100 start = in_buf + *offset;
1101
1102 x = strchr(start, ';');
1103 if (x)
1104 *x = 0;
1105 else
1106 x = start + strlen(start);
1107
1108 if (strlen(start) != 0) {
1109 int i = 0;
1110 /*
1111 * Get rid of leading spaces.
1112 */
1113 while (start[i] == ' ')
1114 i++;
1115
1116 if ((x - start) <= out_len) {
1117 strcpy(out_buf, (start + i));
1118 *offset += (x - start) + 1;
1119 return 1;
1120 }
1121 }
1122 return 0;
1123 }
1124
1125 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1126 {
1127 int ret;
1128
1129 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1130
1131 if (ret < 0)
1132 return HV_E_FAIL;
1133
1134 return 0;
1135 }
1136
1137
1138 static int process_ip_string(FILE *f, char *ip_string, int type)
1139 {
1140 int error = 0;
1141 char addr[INET6_ADDRSTRLEN];
1142 int i = 0;
1143 int j = 0;
1144 char str[256];
1145 char sub_str[10];
1146 int offset = 0;
1147
1148 memset(addr, 0, sizeof(addr));
1149
1150 while (parse_ip_val_buffer(ip_string, &offset, addr,
1151 (MAX_IP_ADDR_SIZE * 2))) {
1152
1153 sub_str[0] = 0;
1154 if (is_ipv4(addr)) {
1155 switch (type) {
1156 case IPADDR:
1157 snprintf(str, sizeof(str), "%s", "IPADDR");
1158 break;
1159 case NETMASK:
1160 snprintf(str, sizeof(str), "%s", "NETMASK");
1161 break;
1162 case GATEWAY:
1163 snprintf(str, sizeof(str), "%s", "GATEWAY");
1164 break;
1165 case DNS:
1166 snprintf(str, sizeof(str), "%s", "DNS");
1167 break;
1168 }
1169
1170 if (type == DNS) {
1171 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1172 } else if (type == GATEWAY && i == 0) {
1173 ++i;
1174 } else {
1175 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1176 }
1177
1178
1179 } else if (expand_ipv6(addr, type)) {
1180 switch (type) {
1181 case IPADDR:
1182 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1183 break;
1184 case NETMASK:
1185 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1186 break;
1187 case GATEWAY:
1188 snprintf(str, sizeof(str), "%s",
1189 "IPV6_DEFAULTGW");
1190 break;
1191 case DNS:
1192 snprintf(str, sizeof(str), "%s", "DNS");
1193 break;
1194 }
1195
1196 if (type == DNS) {
1197 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1198 } else if (j == 0) {
1199 ++j;
1200 } else {
1201 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1202 }
1203 } else {
1204 return HV_INVALIDARG;
1205 }
1206
1207 error = kvp_write_file(f, str, sub_str, addr);
1208 if (error)
1209 return error;
1210 memset(addr, 0, sizeof(addr));
1211 }
1212
1213 return 0;
1214 }
1215
1216 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1217 {
1218 int error = 0;
1219 char if_file[128];
1220 FILE *file;
1221 char cmd[512];
1222 char *mac_addr;
1223
1224 /*
1225 * Set the configuration for the specified interface with
1226 * the information provided. Since there is no standard
1227 * way to configure an interface, we will have an external
1228 * script that does the job of configuring the interface and
1229 * flushing the configuration.
1230 *
1231 * The parameters passed to this external script are:
1232 * 1. A configuration file that has the specified configuration.
1233 *
1234 * We will embed the name of the interface in the configuration
1235 * file: ifcfg-ethx (where ethx is the interface name).
1236 *
1237 * The information provided here may be more than what is needed
1238 * in a given distro to configure the interface and so are free
1239 * ignore information that may not be relevant.
1240 *
1241 * Here is the format of the ip configuration file:
1242 *
1243 * HWADDR=macaddr
1244 * DEVICE=interface name
1245 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1246 * or "none" if no boot-time protocol should be used)
1247 *
1248 * IPADDR0=ipaddr1
1249 * IPADDR1=ipaddr2
1250 * IPADDRx=ipaddry (where y = x + 1)
1251 *
1252 * NETMASK0=netmask1
1253 * NETMASKx=netmasky (where y = x + 1)
1254 *
1255 * GATEWAY=ipaddr1
1256 * GATEWAYx=ipaddry (where y = x + 1)
1257 *
1258 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1259 *
1260 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1261 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1262 * IPV6NETMASK.
1263 *
1264 * The host can specify multiple ipv4 and ipv6 addresses to be
1265 * configured for the interface. Furthermore, the configuration
1266 * needs to be persistent. A subsequent GET call on the interface
1267 * is expected to return the configuration that is set via the SET
1268 * call.
1269 */
1270
1271 snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1272 "/ifcfg-", if_name);
1273
1274 file = fopen(if_file, "w");
1275
1276 if (file == NULL) {
1277 syslog(LOG_ERR, "Failed to open config file");
1278 return HV_E_FAIL;
1279 }
1280
1281 /*
1282 * First write out the MAC address.
1283 */
1284
1285 mac_addr = kvp_if_name_to_mac(if_name);
1286 if (mac_addr == NULL) {
1287 error = HV_E_FAIL;
1288 goto setval_error;
1289 }
1290
1291 error = kvp_write_file(file, "HWADDR", "", mac_addr);
1292 if (error)
1293 goto setval_error;
1294
1295 error = kvp_write_file(file, "DEVICE", "", if_name);
1296 if (error)
1297 goto setval_error;
1298
1299 if (new_val->dhcp_enabled) {
1300 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1301 if (error)
1302 goto setval_error;
1303
1304 /*
1305 * We are done!.
1306 */
1307 goto setval_done;
1308
1309 } else {
1310 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1311 if (error)
1312 goto setval_error;
1313 }
1314
1315 /*
1316 * Write the configuration for ipaddress, netmask, gateway and
1317 * name servers.
1318 */
1319
1320 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1321 if (error)
1322 goto setval_error;
1323
1324 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1325 if (error)
1326 goto setval_error;
1327
1328 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1329 if (error)
1330 goto setval_error;
1331
1332 error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1333 if (error)
1334 goto setval_error;
1335
1336 setval_done:
1337 free(mac_addr);
1338 fclose(file);
1339
1340 /*
1341 * Now that we have populated the configuration file,
1342 * invoke the external script to do its magic.
1343 */
1344
1345 snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
1346 system(cmd);
1347 return 0;
1348
1349 setval_error:
1350 syslog(LOG_ERR, "Failed to write config file");
1351 free(mac_addr);
1352 fclose(file);
1353 return error;
1354 }
1355
1356
1357 static int
1358 kvp_get_domain_name(char *buffer, int length)
1359 {
1360 struct addrinfo hints, *info ;
1361 int error = 0;
1362
1363 gethostname(buffer, length);
1364 memset(&hints, 0, sizeof(hints));
1365 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1366 hints.ai_socktype = SOCK_STREAM;
1367 hints.ai_flags = AI_CANONNAME;
1368
1369 error = getaddrinfo(buffer, NULL, &hints, &info);
1370 if (error != 0) {
1371 strcpy(buffer, "getaddrinfo failed\n");
1372 return error;
1373 }
1374 strcpy(buffer, info->ai_canonname);
1375 freeaddrinfo(info);
1376 return error;
1377 }
1378
1379 static int
1380 netlink_send(int fd, struct cn_msg *msg)
1381 {
1382 struct nlmsghdr *nlh;
1383 unsigned int size;
1384 struct msghdr message;
1385 char buffer[64];
1386 struct iovec iov[2];
1387
1388 size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
1389
1390 nlh = (struct nlmsghdr *)buffer;
1391 nlh->nlmsg_seq = 0;
1392 nlh->nlmsg_pid = getpid();
1393 nlh->nlmsg_type = NLMSG_DONE;
1394 nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
1395 nlh->nlmsg_flags = 0;
1396
1397 iov[0].iov_base = nlh;
1398 iov[0].iov_len = sizeof(*nlh);
1399
1400 iov[1].iov_base = msg;
1401 iov[1].iov_len = size;
1402
1403 memset(&message, 0, sizeof(message));
1404 message.msg_name = &addr;
1405 message.msg_namelen = sizeof(addr);
1406 message.msg_iov = iov;
1407 message.msg_iovlen = 2;
1408
1409 return sendmsg(fd, &message, 0);
1410 }
1411
1412 int main(void)
1413 {
1414 int fd, len, nl_group;
1415 int error;
1416 struct cn_msg *message;
1417 struct pollfd pfd;
1418 struct nlmsghdr *incoming_msg;
1419 struct cn_msg *incoming_cn_msg;
1420 struct hv_kvp_msg *hv_msg;
1421 char *p;
1422 char *key_value;
1423 char *key_name;
1424 int op;
1425 int pool;
1426 char *if_name;
1427 struct hv_kvp_ipaddr_value *kvp_ip_val;
1428
1429 daemon(1, 0);
1430 openlog("KVP", 0, LOG_USER);
1431 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1432 /*
1433 * Retrieve OS release information.
1434 */
1435 kvp_get_os_info();
1436
1437 if (kvp_file_init()) {
1438 syslog(LOG_ERR, "Failed to initialize the pools");
1439 exit(EXIT_FAILURE);
1440 }
1441
1442 fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
1443 if (fd < 0) {
1444 syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
1445 exit(EXIT_FAILURE);
1446 }
1447 addr.nl_family = AF_NETLINK;
1448 addr.nl_pad = 0;
1449 addr.nl_pid = 0;
1450 addr.nl_groups = 0;
1451
1452
1453 error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
1454 if (error < 0) {
1455 syslog(LOG_ERR, "bind failed; error:%d", error);
1456 close(fd);
1457 exit(EXIT_FAILURE);
1458 }
1459 nl_group = CN_KVP_IDX;
1460 setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group));
1461 /*
1462 * Register ourselves with the kernel.
1463 */
1464 message = (struct cn_msg *)kvp_send_buffer;
1465 message->id.idx = CN_KVP_IDX;
1466 message->id.val = CN_KVP_VAL;
1467
1468 hv_msg = (struct hv_kvp_msg *)message->data;
1469 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1470 message->ack = 0;
1471 message->len = sizeof(struct hv_kvp_msg);
1472
1473 len = netlink_send(fd, message);
1474 if (len < 0) {
1475 syslog(LOG_ERR, "netlink_send failed; error:%d", len);
1476 close(fd);
1477 exit(EXIT_FAILURE);
1478 }
1479
1480 pfd.fd = fd;
1481
1482 while (1) {
1483 struct sockaddr *addr_p = (struct sockaddr *) &addr;
1484 socklen_t addr_l = sizeof(addr);
1485 pfd.events = POLLIN;
1486 pfd.revents = 0;
1487 poll(&pfd, 1, -1);
1488
1489 len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
1490 addr_p, &addr_l);
1491
1492 if (len < 0) {
1493 syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
1494 addr.nl_pid, errno, strerror(errno));
1495 close(fd);
1496 return -1;
1497 }
1498
1499 if (addr.nl_pid) {
1500 syslog(LOG_WARNING, "Received packet from untrusted pid:%u",
1501 addr.nl_pid);
1502 continue;
1503 }
1504
1505 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
1506
1507 if (incoming_msg->nlmsg_type != NLMSG_DONE)
1508 continue;
1509
1510 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
1511 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1512
1513 /*
1514 * We will use the KVP header information to pass back
1515 * the error from this daemon. So, first copy the state
1516 * and set the error code to success.
1517 */
1518 op = hv_msg->kvp_hdr.operation;
1519 pool = hv_msg->kvp_hdr.pool;
1520 hv_msg->error = HV_S_OK;
1521
1522 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1523 /*
1524 * Driver is registering with us; stash away the version
1525 * information.
1526 */
1527 in_hand_shake = 0;
1528 p = (char *)hv_msg->body.kvp_register.version;
1529 lic_version = malloc(strlen(p) + 1);
1530 if (lic_version) {
1531 strcpy(lic_version, p);
1532 syslog(LOG_INFO, "KVP LIC Version: %s",
1533 lic_version);
1534 } else {
1535 syslog(LOG_ERR, "malloc failed");
1536 }
1537 continue;
1538 }
1539
1540 switch (op) {
1541 case KVP_OP_GET_IP_INFO:
1542 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1543 if_name =
1544 kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1545
1546 if (if_name == NULL) {
1547 /*
1548 * We could not map the mac address to an
1549 * interface name; return error.
1550 */
1551 hv_msg->error = HV_E_FAIL;
1552 break;
1553 }
1554 error = kvp_get_ip_info(
1555 0, if_name, KVP_OP_GET_IP_INFO,
1556 kvp_ip_val,
1557 (MAX_IP_ADDR_SIZE * 2));
1558
1559 if (error)
1560 hv_msg->error = error;
1561
1562 free(if_name);
1563 break;
1564
1565 case KVP_OP_SET_IP_INFO:
1566 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1567 if_name = kvp_get_if_name(
1568 (char *)kvp_ip_val->adapter_id);
1569 if (if_name == NULL) {
1570 /*
1571 * We could not map the guid to an
1572 * interface name; return error.
1573 */
1574 hv_msg->error = HV_GUID_NOTFOUND;
1575 break;
1576 }
1577 error = kvp_set_ip_info(if_name, kvp_ip_val);
1578 if (error)
1579 hv_msg->error = error;
1580
1581 free(if_name);
1582 break;
1583
1584 case KVP_OP_SET:
1585 if (kvp_key_add_or_modify(pool,
1586 hv_msg->body.kvp_set.data.key,
1587 hv_msg->body.kvp_set.data.key_size,
1588 hv_msg->body.kvp_set.data.value,
1589 hv_msg->body.kvp_set.data.value_size))
1590 hv_msg->error = HV_S_CONT;
1591 break;
1592
1593 case KVP_OP_GET:
1594 if (kvp_get_value(pool,
1595 hv_msg->body.kvp_set.data.key,
1596 hv_msg->body.kvp_set.data.key_size,
1597 hv_msg->body.kvp_set.data.value,
1598 hv_msg->body.kvp_set.data.value_size))
1599 hv_msg->error = HV_S_CONT;
1600 break;
1601
1602 case KVP_OP_DELETE:
1603 if (kvp_key_delete(pool,
1604 hv_msg->body.kvp_delete.key,
1605 hv_msg->body.kvp_delete.key_size))
1606 hv_msg->error = HV_S_CONT;
1607 break;
1608
1609 default:
1610 break;
1611 }
1612
1613 if (op != KVP_OP_ENUMERATE)
1614 goto kvp_done;
1615
1616 /*
1617 * If the pool is KVP_POOL_AUTO, dynamically generate
1618 * both the key and the value; if not read from the
1619 * appropriate pool.
1620 */
1621 if (pool != KVP_POOL_AUTO) {
1622 if (kvp_pool_enumerate(pool,
1623 hv_msg->body.kvp_enum_data.index,
1624 hv_msg->body.kvp_enum_data.data.key,
1625 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1626 hv_msg->body.kvp_enum_data.data.value,
1627 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1628 hv_msg->error = HV_S_CONT;
1629 goto kvp_done;
1630 }
1631
1632 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1633 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1634 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1635
1636 switch (hv_msg->body.kvp_enum_data.index) {
1637 case FullyQualifiedDomainName:
1638 kvp_get_domain_name(key_value,
1639 HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1640 strcpy(key_name, "FullyQualifiedDomainName");
1641 break;
1642 case IntegrationServicesVersion:
1643 strcpy(key_name, "IntegrationServicesVersion");
1644 strcpy(key_value, lic_version);
1645 break;
1646 case NetworkAddressIPv4:
1647 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1648 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1649 strcpy(key_name, "NetworkAddressIPv4");
1650 break;
1651 case NetworkAddressIPv6:
1652 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1653 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1654 strcpy(key_name, "NetworkAddressIPv6");
1655 break;
1656 case OSBuildNumber:
1657 strcpy(key_value, os_build);
1658 strcpy(key_name, "OSBuildNumber");
1659 break;
1660 case OSName:
1661 strcpy(key_value, os_name);
1662 strcpy(key_name, "OSName");
1663 break;
1664 case OSMajorVersion:
1665 strcpy(key_value, os_major);
1666 strcpy(key_name, "OSMajorVersion");
1667 break;
1668 case OSMinorVersion:
1669 strcpy(key_value, os_minor);
1670 strcpy(key_name, "OSMinorVersion");
1671 break;
1672 case OSVersion:
1673 strcpy(key_value, os_version);
1674 strcpy(key_name, "OSVersion");
1675 break;
1676 case ProcessorArchitecture:
1677 strcpy(key_value, processor_arch);
1678 strcpy(key_name, "ProcessorArchitecture");
1679 break;
1680 default:
1681 hv_msg->error = HV_S_CONT;
1682 break;
1683 }
1684 /*
1685 * Send the value back to the kernel. The response is
1686 * already in the receive buffer. Update the cn_msg header to
1687 * reflect the key value that has been added to the message
1688 */
1689 kvp_done:
1690
1691 incoming_cn_msg->id.idx = CN_KVP_IDX;
1692 incoming_cn_msg->id.val = CN_KVP_VAL;
1693 incoming_cn_msg->ack = 0;
1694 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
1695
1696 len = netlink_send(fd, incoming_cn_msg);
1697 if (len < 0) {
1698 syslog(LOG_ERR, "net_link send failed; error:%d", len);
1699 exit(EXIT_FAILURE);
1700 }
1701 }
1702
1703 }
Linux kernel - Deliverables
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