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tools: hv: kvp_daemon: make IPv6-only-injection work
[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 <stdio.h>
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <string.h>
33 #include <ctype.h>
34 #include <errno.h>
35 #include <arpa/inet.h>
36 #include <linux/connector.h>
37 #include <linux/hyperv.h>
38 #include <linux/netlink.h>
39 #include <ifaddrs.h>
40 #include <netdb.h>
41 #include <syslog.h>
42 #include <sys/stat.h>
43 #include <fcntl.h>
44 #include <dirent.h>
45 #include <net/if.h>
46 #include <getopt.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 struct sockaddr_nl addr;
83 static int in_hand_shake = 1;
84
85 static char *os_name = "";
86 static char *os_major = "";
87 static char *os_minor = "";
88 static char *processor_arch;
89 static char *os_build;
90 static char *os_version;
91 static char *lic_version = "Unknown version";
92 static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
93 static struct utsname uts_buf;
94
95 /*
96 * The location of the interface configuration file.
97 */
98
99 #define KVP_CONFIG_LOC "/var/lib/hyperv"
100
101 #define MAX_FILE_NAME 100
102 #define ENTRIES_PER_BLOCK 50
103
104 #ifndef SOL_NETLINK
105 #define SOL_NETLINK 270
106 #endif
107
108 struct kvp_record {
109 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
110 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
111 };
112
113 struct kvp_file_state {
114 int fd;
115 int num_blocks;
116 struct kvp_record *records;
117 int num_records;
118 char fname[MAX_FILE_NAME];
119 };
120
121 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
122
123 static void kvp_acquire_lock(int pool)
124 {
125 struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
126 fl.l_pid = getpid();
127
128 if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
129 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
130 errno, strerror(errno));
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 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
142 errno, strerror(errno));
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 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
161 errno, strerror(errno));
162 kvp_release_lock(pool);
163 exit(EXIT_FAILURE);
164 }
165
166 bytes_written = fwrite(kvp_file_info[pool].records,
167 sizeof(struct kvp_record),
168 kvp_file_info[pool].num_records, filep);
169
170 if (ferror(filep) || fclose(filep)) {
171 kvp_release_lock(pool);
172 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
173 exit(EXIT_FAILURE);
174 }
175
176 kvp_release_lock(pool);
177 }
178
179 static void kvp_update_mem_state(int pool)
180 {
181 FILE *filep;
182 size_t records_read = 0;
183 struct kvp_record *record = kvp_file_info[pool].records;
184 struct kvp_record *readp;
185 int num_blocks = kvp_file_info[pool].num_blocks;
186 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
187
188 kvp_acquire_lock(pool);
189
190 filep = fopen(kvp_file_info[pool].fname, "re");
191 if (!filep) {
192 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
193 errno, strerror(errno));
194 kvp_release_lock(pool);
195 exit(EXIT_FAILURE);
196 }
197 for (;;) {
198 readp = &record[records_read];
199 records_read += fread(readp, sizeof(struct kvp_record),
200 ENTRIES_PER_BLOCK * num_blocks,
201 filep);
202
203 if (ferror(filep)) {
204 syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
205 exit(EXIT_FAILURE);
206 }
207
208 if (!feof(filep)) {
209 /*
210 * We have more data to read.
211 */
212 num_blocks++;
213 record = realloc(record, alloc_unit * num_blocks);
214
215 if (record == NULL) {
216 syslog(LOG_ERR, "malloc failed");
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 static int kvp_file_init(void)
232 {
233 int fd;
234 FILE *filep;
235 size_t records_read;
236 char *fname;
237 struct kvp_record *record;
238 struct kvp_record *readp;
239 int num_blocks;
240 int i;
241 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
242
243 if (access(KVP_CONFIG_LOC, F_OK)) {
244 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
245 syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
246 errno, strerror(errno));
247 exit(EXIT_FAILURE);
248 }
249 }
250
251 for (i = 0; i < KVP_POOL_COUNT; i++) {
252 fname = kvp_file_info[i].fname;
253 records_read = 0;
254 num_blocks = 1;
255 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
256 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
257
258 if (fd == -1)
259 return 1;
260
261
262 filep = fopen(fname, "re");
263 if (!filep) {
264 close(fd);
265 return 1;
266 }
267
268 record = malloc(alloc_unit * num_blocks);
269 if (record == NULL) {
270 fclose(filep);
271 close(fd);
272 return 1;
273 }
274 for (;;) {
275 readp = &record[records_read];
276 records_read += fread(readp, sizeof(struct kvp_record),
277 ENTRIES_PER_BLOCK,
278 filep);
279
280 if (ferror(filep)) {
281 syslog(LOG_ERR, "Failed to read file, pool: %d",
282 i);
283 exit(EXIT_FAILURE);
284 }
285
286 if (!feof(filep)) {
287 /*
288 * We have more data to read.
289 */
290 num_blocks++;
291 record = realloc(record, alloc_unit *
292 num_blocks);
293 if (record == NULL) {
294 fclose(filep);
295 close(fd);
296 return 1;
297 }
298 continue;
299 }
300 break;
301 }
302 kvp_file_info[i].fd = fd;
303 kvp_file_info[i].num_blocks = num_blocks;
304 kvp_file_info[i].records = record;
305 kvp_file_info[i].num_records = records_read;
306 fclose(filep);
307
308 }
309
310 return 0;
311 }
312
313 static int kvp_key_delete(int pool, const char *key, int key_size)
314 {
315 int i;
316 int j, k;
317 int num_records;
318 struct kvp_record *record;
319
320 /*
321 * First update the in-memory state.
322 */
323 kvp_update_mem_state(pool);
324
325 num_records = kvp_file_info[pool].num_records;
326 record = kvp_file_info[pool].records;
327
328 for (i = 0; i < num_records; i++) {
329 if (memcmp(key, record[i].key, key_size))
330 continue;
331 /*
332 * Found a match; just move the remaining
333 * entries up.
334 */
335 if (i == num_records) {
336 kvp_file_info[pool].num_records--;
337 kvp_update_file(pool);
338 return 0;
339 }
340
341 j = i;
342 k = j + 1;
343 for (; k < num_records; k++) {
344 strcpy(record[j].key, record[k].key);
345 strcpy(record[j].value, record[k].value);
346 j++;
347 }
348
349 kvp_file_info[pool].num_records--;
350 kvp_update_file(pool);
351 return 0;
352 }
353 return 1;
354 }
355
356 static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value,
357 int value_size)
358 {
359 int i;
360 int num_records;
361 struct kvp_record *record;
362 int num_blocks;
363
364 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
365 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
366 return 1;
367
368 /*
369 * First update the in-memory state.
370 */
371 kvp_update_mem_state(pool);
372
373 num_records = kvp_file_info[pool].num_records;
374 record = kvp_file_info[pool].records;
375 num_blocks = kvp_file_info[pool].num_blocks;
376
377 for (i = 0; i < num_records; i++) {
378 if (memcmp(key, record[i].key, key_size))
379 continue;
380 /*
381 * Found a match; just update the value -
382 * this is the modify case.
383 */
384 memcpy(record[i].value, value, value_size);
385 kvp_update_file(pool);
386 return 0;
387 }
388
389 /*
390 * Need to add a new entry;
391 */
392 if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
393 /* Need to allocate a larger array for reg entries. */
394 record = realloc(record, sizeof(struct kvp_record) *
395 ENTRIES_PER_BLOCK * (num_blocks + 1));
396
397 if (record == NULL)
398 return 1;
399 kvp_file_info[pool].num_blocks++;
400
401 }
402 memcpy(record[i].value, value, value_size);
403 memcpy(record[i].key, key, key_size);
404 kvp_file_info[pool].records = record;
405 kvp_file_info[pool].num_records++;
406 kvp_update_file(pool);
407 return 0;
408 }
409
410 static int kvp_get_value(int pool, const char *key, int key_size, char *value,
411 int value_size)
412 {
413 int i;
414 int num_records;
415 struct kvp_record *record;
416
417 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
418 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
419 return 1;
420
421 /*
422 * First update the in-memory state.
423 */
424 kvp_update_mem_state(pool);
425
426 num_records = kvp_file_info[pool].num_records;
427 record = kvp_file_info[pool].records;
428
429 for (i = 0; i < num_records; i++) {
430 if (memcmp(key, record[i].key, key_size))
431 continue;
432 /*
433 * Found a match; just copy the value out.
434 */
435 memcpy(value, record[i].value, value_size);
436 return 0;
437 }
438
439 return 1;
440 }
441
442 static int kvp_pool_enumerate(int pool, int index, char *key, int key_size,
443 char *value, int value_size)
444 {
445 struct kvp_record *record;
446
447 /*
448 * First update our in-memory database.
449 */
450 kvp_update_mem_state(pool);
451 record = kvp_file_info[pool].records;
452
453 if (index >= kvp_file_info[pool].num_records) {
454 return 1;
455 }
456
457 memcpy(key, record[index].key, key_size);
458 memcpy(value, record[index].value, value_size);
459 return 0;
460 }
461
462
463 void kvp_get_os_info(void)
464 {
465 FILE *file;
466 char *p, buf[512];
467
468 uname(&uts_buf);
469 os_version = uts_buf.release;
470 os_build = strdup(uts_buf.release);
471
472 os_name = uts_buf.sysname;
473 processor_arch = uts_buf.machine;
474
475 /*
476 * The current windows host (win7) expects the build
477 * string to be of the form: x.y.z
478 * Strip additional information we may have.
479 */
480 p = strchr(os_version, '-');
481 if (p)
482 *p = '\0';
483
484 /*
485 * Parse the /etc/os-release file if present:
486 * http://www.freedesktop.org/software/systemd/man/os-release.html
487 */
488 file = fopen("/etc/os-release", "r");
489 if (file != NULL) {
490 while (fgets(buf, sizeof(buf), file)) {
491 char *value, *q;
492
493 /* Ignore comments */
494 if (buf[0] == '#')
495 continue;
496
497 /* Split into name=value */
498 p = strchr(buf, '=');
499 if (!p)
500 continue;
501 *p++ = 0;
502
503 /* Remove quotes and newline; un-escape */
504 value = p;
505 q = p;
506 while (*p) {
507 if (*p == '\\') {
508 ++p;
509 if (!*p)
510 break;
511 *q++ = *p++;
512 } else if (*p == '\'' || *p == '"' ||
513 *p == '\n') {
514 ++p;
515 } else {
516 *q++ = *p++;
517 }
518 }
519 *q = 0;
520
521 if (!strcmp(buf, "NAME")) {
522 p = strdup(value);
523 if (!p)
524 break;
525 os_name = p;
526 } else if (!strcmp(buf, "VERSION_ID")) {
527 p = strdup(value);
528 if (!p)
529 break;
530 os_major = p;
531 }
532 }
533 fclose(file);
534 return;
535 }
536
537 /* Fallback for older RH/SUSE releases */
538 file = fopen("/etc/SuSE-release", "r");
539 if (file != NULL)
540 goto kvp_osinfo_found;
541 file = fopen("/etc/redhat-release", "r");
542 if (file != NULL)
543 goto kvp_osinfo_found;
544
545 /*
546 * We don't have information about the os.
547 */
548 return;
549
550 kvp_osinfo_found:
551 /* up to three lines */
552 p = fgets(buf, sizeof(buf), file);
553 if (p) {
554 p = strchr(buf, '\n');
555 if (p)
556 *p = '\0';
557 p = strdup(buf);
558 if (!p)
559 goto done;
560 os_name = p;
561
562 /* second line */
563 p = fgets(buf, sizeof(buf), file);
564 if (p) {
565 p = strchr(buf, '\n');
566 if (p)
567 *p = '\0';
568 p = strdup(buf);
569 if (!p)
570 goto done;
571 os_major = p;
572
573 /* third line */
574 p = fgets(buf, sizeof(buf), file);
575 if (p) {
576 p = strchr(buf, '\n');
577 if (p)
578 *p = '\0';
579 p = strdup(buf);
580 if (p)
581 os_minor = p;
582 }
583 }
584 }
585
586 done:
587 fclose(file);
588 return;
589 }
590
591
592
593 /*
594 * Retrieve an interface name corresponding to the specified guid.
595 * If there is a match, the function returns a pointer
596 * to the interface name and if not, a NULL is returned.
597 * If a match is found, the caller is responsible for
598 * freeing the memory.
599 */
600
601 static char *kvp_get_if_name(char *guid)
602 {
603 DIR *dir;
604 struct dirent *entry;
605 FILE *file;
606 char *p, *q, *x;
607 char *if_name = NULL;
608 char buf[256];
609 char *kvp_net_dir = "/sys/class/net/";
610 char dev_id[256];
611
612 dir = opendir(kvp_net_dir);
613 if (dir == NULL)
614 return NULL;
615
616 snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
617 q = dev_id + strlen(kvp_net_dir);
618
619 while ((entry = readdir(dir)) != NULL) {
620 /*
621 * Set the state for the next pass.
622 */
623 *q = '\0';
624 strcat(dev_id, entry->d_name);
625 strcat(dev_id, "/device/device_id");
626
627 file = fopen(dev_id, "r");
628 if (file == NULL)
629 continue;
630
631 p = fgets(buf, sizeof(buf), file);
632 if (p) {
633 x = strchr(p, '\n');
634 if (x)
635 *x = '\0';
636
637 if (!strcmp(p, guid)) {
638 /*
639 * Found the guid match; return the interface
640 * name. The caller will free the memory.
641 */
642 if_name = strdup(entry->d_name);
643 fclose(file);
644 break;
645 }
646 }
647 fclose(file);
648 }
649
650 closedir(dir);
651 return if_name;
652 }
653
654 /*
655 * Retrieve the MAC address given the interface name.
656 */
657
658 static char *kvp_if_name_to_mac(char *if_name)
659 {
660 FILE *file;
661 char *p, *x;
662 char buf[256];
663 char addr_file[256];
664 int i;
665 char *mac_addr = NULL;
666
667 snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
668 if_name, "/address");
669
670 file = fopen(addr_file, "r");
671 if (file == NULL)
672 return NULL;
673
674 p = fgets(buf, sizeof(buf), file);
675 if (p) {
676 x = strchr(p, '\n');
677 if (x)
678 *x = '\0';
679 for (i = 0; i < strlen(p); i++)
680 p[i] = toupper(p[i]);
681 mac_addr = strdup(p);
682 }
683
684 fclose(file);
685 return mac_addr;
686 }
687
688
689 /*
690 * Retrieve the interface name given tha MAC address.
691 */
692
693 static char *kvp_mac_to_if_name(char *mac)
694 {
695 DIR *dir;
696 struct dirent *entry;
697 FILE *file;
698 char *p, *q, *x;
699 char *if_name = NULL;
700 char buf[256];
701 char *kvp_net_dir = "/sys/class/net/";
702 char dev_id[256];
703 int i;
704
705 dir = opendir(kvp_net_dir);
706 if (dir == NULL)
707 return NULL;
708
709 snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
710 q = dev_id + strlen(kvp_net_dir);
711
712 while ((entry = readdir(dir)) != NULL) {
713 /*
714 * Set the state for the next pass.
715 */
716 *q = '\0';
717
718 strcat(dev_id, entry->d_name);
719 strcat(dev_id, "/address");
720
721 file = fopen(dev_id, "r");
722 if (file == NULL)
723 continue;
724
725 p = fgets(buf, sizeof(buf), file);
726 if (p) {
727 x = strchr(p, '\n');
728 if (x)
729 *x = '\0';
730
731 for (i = 0; i < strlen(p); i++)
732 p[i] = toupper(p[i]);
733
734 if (!strcmp(p, mac)) {
735 /*
736 * Found the MAC match; return the interface
737 * name. The caller will free the memory.
738 */
739 if_name = strdup(entry->d_name);
740 fclose(file);
741 break;
742 }
743 }
744 fclose(file);
745 }
746
747 closedir(dir);
748 return if_name;
749 }
750
751
752 static void kvp_process_ipconfig_file(char *cmd,
753 char *config_buf, int len,
754 int element_size, int offset)
755 {
756 char buf[256];
757 char *p;
758 char *x;
759 FILE *file;
760
761 /*
762 * First execute the command.
763 */
764 file = popen(cmd, "r");
765 if (file == NULL)
766 return;
767
768 if (offset == 0)
769 memset(config_buf, 0, len);
770 while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
771 if ((len - strlen(config_buf)) < (element_size + 1))
772 break;
773
774 x = strchr(p, '\n');
775 if (x)
776 *x = '\0';
777
778 strcat(config_buf, p);
779 strcat(config_buf, ";");
780 }
781 pclose(file);
782 }
783
784 static void kvp_get_ipconfig_info(char *if_name,
785 struct hv_kvp_ipaddr_value *buffer)
786 {
787 char cmd[512];
788 char dhcp_info[128];
789 char *p;
790 FILE *file;
791
792 /*
793 * Get the address of default gateway (ipv4).
794 */
795 sprintf(cmd, "%s %s", "ip route show dev", if_name);
796 strcat(cmd, " | awk '/default/ {print $3 }'");
797
798 /*
799 * Execute the command to gather gateway info.
800 */
801 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
802 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
803
804 /*
805 * Get the address of default gateway (ipv6).
806 */
807 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
808 strcat(cmd, " | awk '/default/ {print $3 }'");
809
810 /*
811 * Execute the command to gather gateway info (ipv6).
812 */
813 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
814 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
815
816
817 /*
818 * Gather the DNS state.
819 * Since there is no standard way to get this information
820 * across various distributions of interest; we just invoke
821 * an external script that needs to be ported across distros
822 * of interest.
823 *
824 * Following is the expected format of the information from the script:
825 *
826 * ipaddr1 (nameserver1)
827 * ipaddr2 (nameserver2)
828 * .
829 * .
830 */
831
832 sprintf(cmd, "%s", "hv_get_dns_info");
833
834 /*
835 * Execute the command to gather DNS info.
836 */
837 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
838 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
839
840 /*
841 * Gather the DHCP state.
842 * We will gather this state by invoking an external script.
843 * The parameter to the script is the interface name.
844 * Here is the expected output:
845 *
846 * Enabled: DHCP enabled.
847 */
848
849 sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
850
851 file = popen(cmd, "r");
852 if (file == NULL)
853 return;
854
855 p = fgets(dhcp_info, sizeof(dhcp_info), file);
856 if (p == NULL) {
857 pclose(file);
858 return;
859 }
860
861 if (!strncmp(p, "Enabled", 7))
862 buffer->dhcp_enabled = 1;
863 else
864 buffer->dhcp_enabled = 0;
865
866 pclose(file);
867 }
868
869
870 static unsigned int hweight32(unsigned int *w)
871 {
872 unsigned int res = *w - ((*w >> 1) & 0x55555555);
873 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
874 res = (res + (res >> 4)) & 0x0F0F0F0F;
875 res = res + (res >> 8);
876 return (res + (res >> 16)) & 0x000000FF;
877 }
878
879 static int kvp_process_ip_address(void *addrp,
880 int family, char *buffer,
881 int length, int *offset)
882 {
883 struct sockaddr_in *addr;
884 struct sockaddr_in6 *addr6;
885 int addr_length;
886 char tmp[50];
887 const char *str;
888
889 if (family == AF_INET) {
890 addr = (struct sockaddr_in *)addrp;
891 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
892 addr_length = INET_ADDRSTRLEN;
893 } else {
894 addr6 = (struct sockaddr_in6 *)addrp;
895 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
896 addr_length = INET6_ADDRSTRLEN;
897 }
898
899 if ((length - *offset) < addr_length + 2)
900 return HV_E_FAIL;
901 if (str == NULL) {
902 strcpy(buffer, "inet_ntop failed\n");
903 return HV_E_FAIL;
904 }
905 if (*offset == 0)
906 strcpy(buffer, tmp);
907 else {
908 strcat(buffer, ";");
909 strcat(buffer, tmp);
910 }
911
912 *offset += strlen(str) + 1;
913
914 return 0;
915 }
916
917 static int
918 kvp_get_ip_info(int family, char *if_name, int op,
919 void *out_buffer, int length)
920 {
921 struct ifaddrs *ifap;
922 struct ifaddrs *curp;
923 int offset = 0;
924 int sn_offset = 0;
925 int error = 0;
926 char *buffer;
927 struct hv_kvp_ipaddr_value *ip_buffer;
928 char cidr_mask[5]; /* /xyz */
929 int weight;
930 int i;
931 unsigned int *w;
932 char *sn_str;
933 struct sockaddr_in6 *addr6;
934
935 if (op == KVP_OP_ENUMERATE) {
936 buffer = out_buffer;
937 } else {
938 ip_buffer = out_buffer;
939 buffer = (char *)ip_buffer->ip_addr;
940 ip_buffer->addr_family = 0;
941 }
942 /*
943 * On entry into this function, the buffer is capable of holding the
944 * maximum key value.
945 */
946
947 if (getifaddrs(&ifap)) {
948 strcpy(buffer, "getifaddrs failed\n");
949 return HV_E_FAIL;
950 }
951
952 curp = ifap;
953 while (curp != NULL) {
954 if (curp->ifa_addr == NULL) {
955 curp = curp->ifa_next;
956 continue;
957 }
958
959 if ((if_name != NULL) &&
960 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
961 /*
962 * We want info about a specific interface;
963 * just continue.
964 */
965 curp = curp->ifa_next;
966 continue;
967 }
968
969 /*
970 * We only support two address families: AF_INET and AF_INET6.
971 * If a family value of 0 is specified, we collect both
972 * supported address families; if not we gather info on
973 * the specified address family.
974 */
975 if ((((family != 0) &&
976 (curp->ifa_addr->sa_family != family))) ||
977 (curp->ifa_flags & IFF_LOOPBACK)) {
978 curp = curp->ifa_next;
979 continue;
980 }
981 if ((curp->ifa_addr->sa_family != AF_INET) &&
982 (curp->ifa_addr->sa_family != AF_INET6)) {
983 curp = curp->ifa_next;
984 continue;
985 }
986
987 if (op == KVP_OP_GET_IP_INFO) {
988 /*
989 * Gather info other than the IP address.
990 * IP address info will be gathered later.
991 */
992 if (curp->ifa_addr->sa_family == AF_INET) {
993 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
994 /*
995 * Get subnet info.
996 */
997 error = kvp_process_ip_address(
998 curp->ifa_netmask,
999 AF_INET,
1000 (char *)
1001 ip_buffer->sub_net,
1002 length,
1003 &sn_offset);
1004 if (error)
1005 goto gather_ipaddr;
1006 } else {
1007 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
1008
1009 /*
1010 * Get subnet info in CIDR format.
1011 */
1012 weight = 0;
1013 sn_str = (char *)ip_buffer->sub_net;
1014 addr6 = (struct sockaddr_in6 *)
1015 curp->ifa_netmask;
1016 w = addr6->sin6_addr.s6_addr32;
1017
1018 for (i = 0; i < 4; i++)
1019 weight += hweight32(&w[i]);
1020
1021 sprintf(cidr_mask, "/%d", weight);
1022 if ((length - sn_offset) <
1023 (strlen(cidr_mask) + 1))
1024 goto gather_ipaddr;
1025
1026 if (sn_offset == 0)
1027 strcpy(sn_str, cidr_mask);
1028 else {
1029 strcat((char *)ip_buffer->sub_net, ";");
1030 strcat(sn_str, cidr_mask);
1031 }
1032 sn_offset += strlen(sn_str) + 1;
1033 }
1034
1035 /*
1036 * Collect other ip related configuration info.
1037 */
1038
1039 kvp_get_ipconfig_info(if_name, ip_buffer);
1040 }
1041
1042 gather_ipaddr:
1043 error = kvp_process_ip_address(curp->ifa_addr,
1044 curp->ifa_addr->sa_family,
1045 buffer,
1046 length, &offset);
1047 if (error)
1048 goto getaddr_done;
1049
1050 curp = curp->ifa_next;
1051 }
1052
1053 getaddr_done:
1054 freeifaddrs(ifap);
1055 return error;
1056 }
1057
1058
1059 static int expand_ipv6(char *addr, int type)
1060 {
1061 int ret;
1062 struct in6_addr v6_addr;
1063
1064 ret = inet_pton(AF_INET6, addr, &v6_addr);
1065
1066 if (ret != 1) {
1067 if (type == NETMASK)
1068 return 1;
1069 return 0;
1070 }
1071
1072 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1073 "%02x%02x:%02x%02x:%02x%02x",
1074 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1075 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1076 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1077 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1078 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1079 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1080 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1081 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1082
1083 return 1;
1084
1085 }
1086
1087 static int is_ipv4(char *addr)
1088 {
1089 int ret;
1090 struct in_addr ipv4_addr;
1091
1092 ret = inet_pton(AF_INET, addr, &ipv4_addr);
1093
1094 if (ret == 1)
1095 return 1;
1096 return 0;
1097 }
1098
1099 static int parse_ip_val_buffer(char *in_buf, int *offset,
1100 char *out_buf, int out_len)
1101 {
1102 char *x;
1103 char *start;
1104
1105 /*
1106 * in_buf has sequence of characters that are seperated by
1107 * the character ';'. The last sequence does not have the
1108 * terminating ";" character.
1109 */
1110 start = in_buf + *offset;
1111
1112 x = strchr(start, ';');
1113 if (x)
1114 *x = 0;
1115 else
1116 x = start + strlen(start);
1117
1118 if (strlen(start) != 0) {
1119 int i = 0;
1120 /*
1121 * Get rid of leading spaces.
1122 */
1123 while (start[i] == ' ')
1124 i++;
1125
1126 if ((x - start) <= out_len) {
1127 strcpy(out_buf, (start + i));
1128 *offset += (x - start) + 1;
1129 return 1;
1130 }
1131 }
1132 return 0;
1133 }
1134
1135 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1136 {
1137 int ret;
1138
1139 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1140
1141 if (ret < 0)
1142 return HV_E_FAIL;
1143
1144 return 0;
1145 }
1146
1147
1148 static int process_ip_string(FILE *f, char *ip_string, int type)
1149 {
1150 int error = 0;
1151 char addr[INET6_ADDRSTRLEN];
1152 int i = 0;
1153 int j = 0;
1154 char str[256];
1155 char sub_str[10];
1156 int offset = 0;
1157
1158 memset(addr, 0, sizeof(addr));
1159
1160 while (parse_ip_val_buffer(ip_string, &offset, addr,
1161 (MAX_IP_ADDR_SIZE * 2))) {
1162
1163 sub_str[0] = 0;
1164 if (is_ipv4(addr)) {
1165 switch (type) {
1166 case IPADDR:
1167 snprintf(str, sizeof(str), "%s", "IPADDR");
1168 break;
1169 case NETMASK:
1170 snprintf(str, sizeof(str), "%s", "NETMASK");
1171 break;
1172 case GATEWAY:
1173 snprintf(str, sizeof(str), "%s", "GATEWAY");
1174 break;
1175 case DNS:
1176 snprintf(str, sizeof(str), "%s", "DNS");
1177 break;
1178 }
1179
1180 if (type == DNS) {
1181 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1182 } else if (type == GATEWAY && i == 0) {
1183 ++i;
1184 } else {
1185 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1186 }
1187
1188
1189 } else if (expand_ipv6(addr, type)) {
1190 switch (type) {
1191 case IPADDR:
1192 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1193 break;
1194 case NETMASK:
1195 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1196 break;
1197 case GATEWAY:
1198 snprintf(str, sizeof(str), "%s",
1199 "IPV6_DEFAULTGW");
1200 break;
1201 case DNS:
1202 snprintf(str, sizeof(str), "%s", "DNS");
1203 break;
1204 }
1205
1206 if (type == DNS) {
1207 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1208 } else if (j == 0) {
1209 ++j;
1210 } else {
1211 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1212 }
1213 } else {
1214 return HV_INVALIDARG;
1215 }
1216
1217 error = kvp_write_file(f, str, sub_str, addr);
1218 if (error)
1219 return error;
1220 memset(addr, 0, sizeof(addr));
1221 }
1222
1223 return 0;
1224 }
1225
1226 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1227 {
1228 int error = 0;
1229 char if_file[128];
1230 FILE *file;
1231 char cmd[512];
1232 char *mac_addr;
1233
1234 /*
1235 * Set the configuration for the specified interface with
1236 * the information provided. Since there is no standard
1237 * way to configure an interface, we will have an external
1238 * script that does the job of configuring the interface and
1239 * flushing the configuration.
1240 *
1241 * The parameters passed to this external script are:
1242 * 1. A configuration file that has the specified configuration.
1243 *
1244 * We will embed the name of the interface in the configuration
1245 * file: ifcfg-ethx (where ethx is the interface name).
1246 *
1247 * The information provided here may be more than what is needed
1248 * in a given distro to configure the interface and so are free
1249 * ignore information that may not be relevant.
1250 *
1251 * Here is the format of the ip configuration file:
1252 *
1253 * HWADDR=macaddr
1254 * DEVICE=interface name
1255 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1256 * or "none" if no boot-time protocol should be used)
1257 *
1258 * IPADDR0=ipaddr1
1259 * IPADDR1=ipaddr2
1260 * IPADDRx=ipaddry (where y = x + 1)
1261 *
1262 * NETMASK0=netmask1
1263 * NETMASKx=netmasky (where y = x + 1)
1264 *
1265 * GATEWAY=ipaddr1
1266 * GATEWAYx=ipaddry (where y = x + 1)
1267 *
1268 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1269 *
1270 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1271 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1272 * IPV6NETMASK.
1273 *
1274 * The host can specify multiple ipv4 and ipv6 addresses to be
1275 * configured for the interface. Furthermore, the configuration
1276 * needs to be persistent. A subsequent GET call on the interface
1277 * is expected to return the configuration that is set via the SET
1278 * call.
1279 */
1280
1281 snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1282 "/ifcfg-", if_name);
1283
1284 file = fopen(if_file, "w");
1285
1286 if (file == NULL) {
1287 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1288 errno, strerror(errno));
1289 return HV_E_FAIL;
1290 }
1291
1292 /*
1293 * First write out the MAC address.
1294 */
1295
1296 mac_addr = kvp_if_name_to_mac(if_name);
1297 if (mac_addr == NULL) {
1298 error = HV_E_FAIL;
1299 goto setval_error;
1300 }
1301
1302 error = kvp_write_file(file, "HWADDR", "", mac_addr);
1303 free(mac_addr);
1304 if (error)
1305 goto setval_error;
1306
1307 error = kvp_write_file(file, "DEVICE", "", if_name);
1308 if (error)
1309 goto setval_error;
1310
1311 /*
1312 * The dhcp_enabled flag is only for IPv4. In the case the host only
1313 * injects an IPv6 address, the flag is true, but we still need to
1314 * proceed to parse and pass the IPv6 information to the
1315 * disto-specific script hv_set_ifconfig.
1316 */
1317 if (new_val->dhcp_enabled) {
1318 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1319 if (error)
1320 goto setval_error;
1321
1322 } else {
1323 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1324 if (error)
1325 goto setval_error;
1326 }
1327
1328 /*
1329 * Write the configuration for ipaddress, netmask, gateway and
1330 * name servers.
1331 */
1332
1333 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1334 if (error)
1335 goto setval_error;
1336
1337 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1338 if (error)
1339 goto setval_error;
1340
1341 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1342 if (error)
1343 goto setval_error;
1344
1345 error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1346 if (error)
1347 goto setval_error;
1348
1349 fclose(file);
1350
1351 /*
1352 * Now that we have populated the configuration file,
1353 * invoke the external script to do its magic.
1354 */
1355
1356 snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
1357 if (system(cmd)) {
1358 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1359 cmd, errno, strerror(errno));
1360 return HV_E_FAIL;
1361 }
1362 return 0;
1363
1364 setval_error:
1365 syslog(LOG_ERR, "Failed to write config file");
1366 fclose(file);
1367 return error;
1368 }
1369
1370
1371 static void
1372 kvp_get_domain_name(char *buffer, int length)
1373 {
1374 struct addrinfo hints, *info ;
1375 int error = 0;
1376
1377 gethostname(buffer, length);
1378 memset(&hints, 0, sizeof(hints));
1379 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1380 hints.ai_socktype = SOCK_STREAM;
1381 hints.ai_flags = AI_CANONNAME;
1382
1383 error = getaddrinfo(buffer, NULL, &hints, &info);
1384 if (error != 0) {
1385 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1386 error, gai_strerror(error));
1387 return;
1388 }
1389 snprintf(buffer, length, "%s", info->ai_canonname);
1390 freeaddrinfo(info);
1391 }
1392
1393 static int
1394 netlink_send(int fd, struct cn_msg *msg)
1395 {
1396 struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE };
1397 unsigned int size;
1398 struct msghdr message;
1399 struct iovec iov[2];
1400
1401 size = sizeof(struct cn_msg) + msg->len;
1402
1403 nlh.nlmsg_pid = getpid();
1404 nlh.nlmsg_len = NLMSG_LENGTH(size);
1405
1406 iov[0].iov_base = &nlh;
1407 iov[0].iov_len = sizeof(nlh);
1408
1409 iov[1].iov_base = msg;
1410 iov[1].iov_len = size;
1411
1412 memset(&message, 0, sizeof(message));
1413 message.msg_name = &addr;
1414 message.msg_namelen = sizeof(addr);
1415 message.msg_iov = iov;
1416 message.msg_iovlen = 2;
1417
1418 return sendmsg(fd, &message, 0);
1419 }
1420
1421 void print_usage(char *argv[])
1422 {
1423 fprintf(stderr, "Usage: %s [options]\n"
1424 "Options are:\n"
1425 " -n, --no-daemon stay in foreground, don't daemonize\n"
1426 " -h, --help print this help\n", argv[0]);
1427 }
1428
1429 int main(int argc, char *argv[])
1430 {
1431 int fd, len, nl_group;
1432 int error;
1433 struct cn_msg *message;
1434 struct pollfd pfd;
1435 struct nlmsghdr *incoming_msg;
1436 struct cn_msg *incoming_cn_msg;
1437 struct hv_kvp_msg *hv_msg;
1438 char *p;
1439 char *key_value;
1440 char *key_name;
1441 int op;
1442 int pool;
1443 char *if_name;
1444 struct hv_kvp_ipaddr_value *kvp_ip_val;
1445 char *kvp_recv_buffer;
1446 size_t kvp_recv_buffer_len;
1447 int daemonize = 1, long_index = 0, opt;
1448
1449 static struct option long_options[] = {
1450 {"help", no_argument, 0, 'h' },
1451 {"no-daemon", no_argument, 0, 'n' },
1452 {0, 0, 0, 0 }
1453 };
1454
1455 while ((opt = getopt_long(argc, argv, "hn", long_options,
1456 &long_index)) != -1) {
1457 switch (opt) {
1458 case 'n':
1459 daemonize = 0;
1460 break;
1461 case 'h':
1462 default:
1463 print_usage(argv);
1464 exit(EXIT_FAILURE);
1465 }
1466 }
1467
1468 if (daemonize && daemon(1, 0))
1469 return 1;
1470
1471 openlog("KVP", 0, LOG_USER);
1472 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1473
1474 kvp_recv_buffer_len = NLMSG_LENGTH(0) + sizeof(struct cn_msg) + sizeof(struct hv_kvp_msg);
1475 kvp_recv_buffer = calloc(1, kvp_recv_buffer_len);
1476 if (!kvp_recv_buffer) {
1477 syslog(LOG_ERR, "Failed to allocate netlink buffer");
1478 exit(EXIT_FAILURE);
1479 }
1480 /*
1481 * Retrieve OS release information.
1482 */
1483 kvp_get_os_info();
1484 /*
1485 * Cache Fully Qualified Domain Name because getaddrinfo takes an
1486 * unpredictable amount of time to finish.
1487 */
1488 kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
1489
1490 if (kvp_file_init()) {
1491 syslog(LOG_ERR, "Failed to initialize the pools");
1492 exit(EXIT_FAILURE);
1493 }
1494
1495 fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
1496 if (fd < 0) {
1497 syslog(LOG_ERR, "netlink socket creation failed; error: %d %s", errno,
1498 strerror(errno));
1499 exit(EXIT_FAILURE);
1500 }
1501 addr.nl_family = AF_NETLINK;
1502 addr.nl_pad = 0;
1503 addr.nl_pid = 0;
1504 addr.nl_groups = 0;
1505
1506
1507 error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
1508 if (error < 0) {
1509 syslog(LOG_ERR, "bind failed; error: %d %s", errno, strerror(errno));
1510 close(fd);
1511 exit(EXIT_FAILURE);
1512 }
1513 nl_group = CN_KVP_IDX;
1514
1515 if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) {
1516 syslog(LOG_ERR, "setsockopt failed; error: %d %s", errno, strerror(errno));
1517 close(fd);
1518 exit(EXIT_FAILURE);
1519 }
1520
1521 /*
1522 * Register ourselves with the kernel.
1523 */
1524 message = (struct cn_msg *)kvp_recv_buffer;
1525 message->id.idx = CN_KVP_IDX;
1526 message->id.val = CN_KVP_VAL;
1527
1528 hv_msg = (struct hv_kvp_msg *)message->data;
1529 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1530 message->ack = 0;
1531 message->len = sizeof(struct hv_kvp_msg);
1532
1533 len = netlink_send(fd, message);
1534 if (len < 0) {
1535 syslog(LOG_ERR, "netlink_send failed; error: %d %s", errno, strerror(errno));
1536 close(fd);
1537 exit(EXIT_FAILURE);
1538 }
1539
1540 pfd.fd = fd;
1541
1542 while (1) {
1543 struct sockaddr *addr_p = (struct sockaddr *) &addr;
1544 socklen_t addr_l = sizeof(addr);
1545 pfd.events = POLLIN;
1546 pfd.revents = 0;
1547
1548 if (poll(&pfd, 1, -1) < 0) {
1549 syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1550 if (errno == EINVAL) {
1551 close(fd);
1552 exit(EXIT_FAILURE);
1553 }
1554 else
1555 continue;
1556 }
1557
1558 len = recvfrom(fd, kvp_recv_buffer, kvp_recv_buffer_len, 0,
1559 addr_p, &addr_l);
1560
1561 if (len < 0) {
1562 int saved_errno = errno;
1563 syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
1564 addr.nl_pid, errno, strerror(errno));
1565
1566 if (saved_errno == ENOBUFS) {
1567 syslog(LOG_ERR, "receive error: ignored");
1568 continue;
1569 }
1570
1571 close(fd);
1572 return -1;
1573 }
1574
1575 if (addr.nl_pid) {
1576 syslog(LOG_WARNING, "Received packet from untrusted pid:%u",
1577 addr.nl_pid);
1578 continue;
1579 }
1580
1581 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
1582
1583 if (incoming_msg->nlmsg_type != NLMSG_DONE)
1584 continue;
1585
1586 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
1587 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1588
1589 /*
1590 * We will use the KVP header information to pass back
1591 * the error from this daemon. So, first copy the state
1592 * and set the error code to success.
1593 */
1594 op = hv_msg->kvp_hdr.operation;
1595 pool = hv_msg->kvp_hdr.pool;
1596 hv_msg->error = HV_S_OK;
1597
1598 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1599 /*
1600 * Driver is registering with us; stash away the version
1601 * information.
1602 */
1603 in_hand_shake = 0;
1604 p = (char *)hv_msg->body.kvp_register.version;
1605 lic_version = malloc(strlen(p) + 1);
1606 if (lic_version) {
1607 strcpy(lic_version, p);
1608 syslog(LOG_INFO, "KVP LIC Version: %s",
1609 lic_version);
1610 } else {
1611 syslog(LOG_ERR, "malloc failed");
1612 }
1613 continue;
1614 }
1615
1616 switch (op) {
1617 case KVP_OP_GET_IP_INFO:
1618 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1619 if_name =
1620 kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1621
1622 if (if_name == NULL) {
1623 /*
1624 * We could not map the mac address to an
1625 * interface name; return error.
1626 */
1627 hv_msg->error = HV_E_FAIL;
1628 break;
1629 }
1630 error = kvp_get_ip_info(
1631 0, if_name, KVP_OP_GET_IP_INFO,
1632 kvp_ip_val,
1633 (MAX_IP_ADDR_SIZE * 2));
1634
1635 if (error)
1636 hv_msg->error = error;
1637
1638 free(if_name);
1639 break;
1640
1641 case KVP_OP_SET_IP_INFO:
1642 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1643 if_name = kvp_get_if_name(
1644 (char *)kvp_ip_val->adapter_id);
1645 if (if_name == NULL) {
1646 /*
1647 * We could not map the guid to an
1648 * interface name; return error.
1649 */
1650 hv_msg->error = HV_GUID_NOTFOUND;
1651 break;
1652 }
1653 error = kvp_set_ip_info(if_name, kvp_ip_val);
1654 if (error)
1655 hv_msg->error = error;
1656
1657 free(if_name);
1658 break;
1659
1660 case KVP_OP_SET:
1661 if (kvp_key_add_or_modify(pool,
1662 hv_msg->body.kvp_set.data.key,
1663 hv_msg->body.kvp_set.data.key_size,
1664 hv_msg->body.kvp_set.data.value,
1665 hv_msg->body.kvp_set.data.value_size))
1666 hv_msg->error = HV_S_CONT;
1667 break;
1668
1669 case KVP_OP_GET:
1670 if (kvp_get_value(pool,
1671 hv_msg->body.kvp_set.data.key,
1672 hv_msg->body.kvp_set.data.key_size,
1673 hv_msg->body.kvp_set.data.value,
1674 hv_msg->body.kvp_set.data.value_size))
1675 hv_msg->error = HV_S_CONT;
1676 break;
1677
1678 case KVP_OP_DELETE:
1679 if (kvp_key_delete(pool,
1680 hv_msg->body.kvp_delete.key,
1681 hv_msg->body.kvp_delete.key_size))
1682 hv_msg->error = HV_S_CONT;
1683 break;
1684
1685 default:
1686 break;
1687 }
1688
1689 if (op != KVP_OP_ENUMERATE)
1690 goto kvp_done;
1691
1692 /*
1693 * If the pool is KVP_POOL_AUTO, dynamically generate
1694 * both the key and the value; if not read from the
1695 * appropriate pool.
1696 */
1697 if (pool != KVP_POOL_AUTO) {
1698 if (kvp_pool_enumerate(pool,
1699 hv_msg->body.kvp_enum_data.index,
1700 hv_msg->body.kvp_enum_data.data.key,
1701 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1702 hv_msg->body.kvp_enum_data.data.value,
1703 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1704 hv_msg->error = HV_S_CONT;
1705 goto kvp_done;
1706 }
1707
1708 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1709 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1710 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1711
1712 switch (hv_msg->body.kvp_enum_data.index) {
1713 case FullyQualifiedDomainName:
1714 strcpy(key_value, full_domain_name);
1715 strcpy(key_name, "FullyQualifiedDomainName");
1716 break;
1717 case IntegrationServicesVersion:
1718 strcpy(key_name, "IntegrationServicesVersion");
1719 strcpy(key_value, lic_version);
1720 break;
1721 case NetworkAddressIPv4:
1722 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1723 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1724 strcpy(key_name, "NetworkAddressIPv4");
1725 break;
1726 case NetworkAddressIPv6:
1727 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1728 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1729 strcpy(key_name, "NetworkAddressIPv6");
1730 break;
1731 case OSBuildNumber:
1732 strcpy(key_value, os_build);
1733 strcpy(key_name, "OSBuildNumber");
1734 break;
1735 case OSName:
1736 strcpy(key_value, os_name);
1737 strcpy(key_name, "OSName");
1738 break;
1739 case OSMajorVersion:
1740 strcpy(key_value, os_major);
1741 strcpy(key_name, "OSMajorVersion");
1742 break;
1743 case OSMinorVersion:
1744 strcpy(key_value, os_minor);
1745 strcpy(key_name, "OSMinorVersion");
1746 break;
1747 case OSVersion:
1748 strcpy(key_value, os_version);
1749 strcpy(key_name, "OSVersion");
1750 break;
1751 case ProcessorArchitecture:
1752 strcpy(key_value, processor_arch);
1753 strcpy(key_name, "ProcessorArchitecture");
1754 break;
1755 default:
1756 hv_msg->error = HV_S_CONT;
1757 break;
1758 }
1759 /*
1760 * Send the value back to the kernel. The response is
1761 * already in the receive buffer. Update the cn_msg header to
1762 * reflect the key value that has been added to the message
1763 */
1764 kvp_done:
1765
1766 incoming_cn_msg->id.idx = CN_KVP_IDX;
1767 incoming_cn_msg->id.val = CN_KVP_VAL;
1768 incoming_cn_msg->ack = 0;
1769 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
1770
1771 len = netlink_send(fd, incoming_cn_msg);
1772 if (len < 0) {
1773 int saved_errno = errno;
1774 syslog(LOG_ERR, "net_link send failed; error: %d %s", errno,
1775 strerror(errno));
1776
1777 if (saved_errno == ENOMEM || saved_errno == ENOBUFS) {
1778 syslog(LOG_ERR, "send error: ignored");
1779 continue;
1780 }
1781
1782 exit(EXIT_FAILURE);
1783 }
1784 }
1785
1786 }
Linux kernel - Deliverables
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