4514fb41da5edb4b7ccba16af03c2c74c38776bc
[linux-3.10.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
47 /*
48  * KVP protocol: The user mode component first registers with the
49  * the kernel component. Subsequently, the kernel component requests, data
50  * for the specified keys. In response to this message the user mode component
51  * fills in the value corresponding to the specified key. We overload the
52  * sequence field in the cn_msg header to define our KVP message types.
53  *
54  * We use this infrastructure for also supporting queries from user mode
55  * application for state that may be maintained in the KVP kernel component.
56  *
57  */
58
59
60 enum key_index {
61         FullyQualifiedDomainName = 0,
62         IntegrationServicesVersion, /*This key is serviced in the kernel*/
63         NetworkAddressIPv4,
64         NetworkAddressIPv6,
65         OSBuildNumber,
66         OSName,
67         OSMajorVersion,
68         OSMinorVersion,
69         OSVersion,
70         ProcessorArchitecture
71 };
72
73
74 enum {
75         IPADDR = 0,
76         NETMASK,
77         GATEWAY,
78         DNS
79 };
80
81 static char kvp_send_buffer[4096];
82 static char kvp_recv_buffer[4096 * 2];
83 static struct sockaddr_nl addr;
84 static int in_hand_shake = 1;
85
86 static char *os_name = "";
87 static char *os_major = "";
88 static char *os_minor = "";
89 static char *processor_arch;
90 static char *os_build;
91 static char *lic_version = "Unknown version";
92 static struct utsname uts_buf;
93
94 /*
95  * The location of the interface configuration file.
96  */
97
98 #define KVP_CONFIG_LOC  "/var/opt/"
99
100 #define MAX_FILE_NAME 100
101 #define ENTRIES_PER_BLOCK 50
102
103 struct kvp_record {
104         char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
105         char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
106 };
107
108 struct kvp_file_state {
109         int fd;
110         int num_blocks;
111         struct kvp_record *records;
112         int num_records;
113         char fname[MAX_FILE_NAME];
114 };
115
116 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
117
118 static void kvp_acquire_lock(int pool)
119 {
120         struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
121         fl.l_pid = getpid();
122
123         if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
124                 syslog(LOG_ERR, "Failed to acquire the lock pool: %d", pool);
125                 exit(-1);
126         }
127 }
128
129 static void kvp_release_lock(int pool)
130 {
131         struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
132         fl.l_pid = getpid();
133
134         if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
135                 perror("fcntl");
136                 syslog(LOG_ERR, "Failed to release the lock pool: %d", pool);
137                 exit(-1);
138         }
139 }
140
141 static void kvp_update_file(int pool)
142 {
143         FILE *filep;
144         size_t bytes_written;
145
146         /*
147          * We are going to write our in-memory registry out to
148          * disk; acquire the lock first.
149          */
150         kvp_acquire_lock(pool);
151
152         filep = fopen(kvp_file_info[pool].fname, "w");
153         if (!filep) {
154                 kvp_release_lock(pool);
155                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
156                 exit(-1);
157         }
158
159         bytes_written = fwrite(kvp_file_info[pool].records,
160                                 sizeof(struct kvp_record),
161                                 kvp_file_info[pool].num_records, filep);
162
163         fclose(filep);
164         kvp_release_lock(pool);
165 }
166
167 static void kvp_update_mem_state(int pool)
168 {
169         FILE *filep;
170         size_t records_read = 0;
171         struct kvp_record *record = kvp_file_info[pool].records;
172         struct kvp_record *readp;
173         int num_blocks = kvp_file_info[pool].num_blocks;
174         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
175
176         kvp_acquire_lock(pool);
177
178         filep = fopen(kvp_file_info[pool].fname, "r");
179         if (!filep) {
180                 kvp_release_lock(pool);
181                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
182                 exit(-1);
183         }
184         while (!feof(filep)) {
185                 readp = &record[records_read];
186                 records_read += fread(readp, sizeof(struct kvp_record),
187                                         ENTRIES_PER_BLOCK * num_blocks,
188                                         filep);
189
190                 if (!feof(filep)) {
191                         /*
192                          * We have more data to read.
193                          */
194                         num_blocks++;
195                         record = realloc(record, alloc_unit * num_blocks);
196
197                         if (record == NULL) {
198                                 syslog(LOG_ERR, "malloc failed");
199                                 exit(-1);
200                         }
201                         continue;
202                 }
203                 break;
204         }
205
206         kvp_file_info[pool].num_blocks = num_blocks;
207         kvp_file_info[pool].records = record;
208         kvp_file_info[pool].num_records = records_read;
209
210         fclose(filep);
211         kvp_release_lock(pool);
212 }
213 static int kvp_file_init(void)
214 {
215         int  fd;
216         FILE *filep;
217         size_t records_read;
218         char *fname;
219         struct kvp_record *record;
220         struct kvp_record *readp;
221         int num_blocks;
222         int i;
223         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
224
225         if (access("/var/opt/hyperv", F_OK)) {
226                 if (mkdir("/var/opt/hyperv", S_IRUSR | S_IWUSR | S_IROTH)) {
227                         syslog(LOG_ERR, " Failed to create /var/opt/hyperv");
228                         exit(-1);
229                 }
230         }
231
232         for (i = 0; i < KVP_POOL_COUNT; i++) {
233                 fname = kvp_file_info[i].fname;
234                 records_read = 0;
235                 num_blocks = 1;
236                 sprintf(fname, "/var/opt/hyperv/.kvp_pool_%d", i);
237                 fd = open(fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IROTH);
238
239                 if (fd == -1)
240                         return 1;
241
242
243                 filep = fopen(fname, "r");
244                 if (!filep)
245                         return 1;
246
247                 record = malloc(alloc_unit * num_blocks);
248                 if (record == NULL) {
249                         fclose(filep);
250                         return 1;
251                 }
252                 while (!feof(filep)) {
253                         readp = &record[records_read];
254                         records_read += fread(readp, sizeof(struct kvp_record),
255                                         ENTRIES_PER_BLOCK,
256                                         filep);
257
258                         if (!feof(filep)) {
259                                 /*
260                                  * We have more data to read.
261                                  */
262                                 num_blocks++;
263                                 record = realloc(record, alloc_unit *
264                                                 num_blocks);
265                                 if (record == NULL) {
266                                         fclose(filep);
267                                         return 1;
268                                 }
269                                 continue;
270                         }
271                         break;
272                 }
273                 kvp_file_info[i].fd = fd;
274                 kvp_file_info[i].num_blocks = num_blocks;
275                 kvp_file_info[i].records = record;
276                 kvp_file_info[i].num_records = records_read;
277                 fclose(filep);
278
279         }
280
281         return 0;
282 }
283
284 static int kvp_key_delete(int pool, __u8 *key, int key_size)
285 {
286         int i;
287         int j, k;
288         int num_records;
289         struct kvp_record *record;
290
291         /*
292          * First update the in-memory state.
293          */
294         kvp_update_mem_state(pool);
295
296         num_records = kvp_file_info[pool].num_records;
297         record = kvp_file_info[pool].records;
298
299         for (i = 0; i < num_records; i++) {
300                 if (memcmp(key, record[i].key, key_size))
301                         continue;
302                 /*
303                  * Found a match; just move the remaining
304                  * entries up.
305                  */
306                 if (i == num_records) {
307                         kvp_file_info[pool].num_records--;
308                         kvp_update_file(pool);
309                         return 0;
310                 }
311
312                 j = i;
313                 k = j + 1;
314                 for (; k < num_records; k++) {
315                         strcpy(record[j].key, record[k].key);
316                         strcpy(record[j].value, record[k].value);
317                         j++;
318                 }
319
320                 kvp_file_info[pool].num_records--;
321                 kvp_update_file(pool);
322                 return 0;
323         }
324         return 1;
325 }
326
327 static int kvp_key_add_or_modify(int pool, __u8 *key, int key_size, __u8 *value,
328                         int value_size)
329 {
330         int i;
331         int num_records;
332         struct kvp_record *record;
333         int num_blocks;
334
335         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
336                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
337                 return 1;
338
339         /*
340          * First update the in-memory state.
341          */
342         kvp_update_mem_state(pool);
343
344         num_records = kvp_file_info[pool].num_records;
345         record = kvp_file_info[pool].records;
346         num_blocks = kvp_file_info[pool].num_blocks;
347
348         for (i = 0; i < num_records; i++) {
349                 if (memcmp(key, record[i].key, key_size))
350                         continue;
351                 /*
352                  * Found a match; just update the value -
353                  * this is the modify case.
354                  */
355                 memcpy(record[i].value, value, value_size);
356                 kvp_update_file(pool);
357                 return 0;
358         }
359
360         /*
361          * Need to add a new entry;
362          */
363         if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
364                 /* Need to allocate a larger array for reg entries. */
365                 record = realloc(record, sizeof(struct kvp_record) *
366                          ENTRIES_PER_BLOCK * (num_blocks + 1));
367
368                 if (record == NULL)
369                         return 1;
370                 kvp_file_info[pool].num_blocks++;
371
372         }
373         memcpy(record[i].value, value, value_size);
374         memcpy(record[i].key, key, key_size);
375         kvp_file_info[pool].records = record;
376         kvp_file_info[pool].num_records++;
377         kvp_update_file(pool);
378         return 0;
379 }
380
381 static int kvp_get_value(int pool, __u8 *key, int key_size, __u8 *value,
382                         int value_size)
383 {
384         int i;
385         int num_records;
386         struct kvp_record *record;
387
388         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
389                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
390                 return 1;
391
392         /*
393          * First update the in-memory state.
394          */
395         kvp_update_mem_state(pool);
396
397         num_records = kvp_file_info[pool].num_records;
398         record = kvp_file_info[pool].records;
399
400         for (i = 0; i < num_records; i++) {
401                 if (memcmp(key, record[i].key, key_size))
402                         continue;
403                 /*
404                  * Found a match; just copy the value out.
405                  */
406                 memcpy(value, record[i].value, value_size);
407                 return 0;
408         }
409
410         return 1;
411 }
412
413 static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
414                                 __u8 *value, int value_size)
415 {
416         struct kvp_record *record;
417
418         /*
419          * First update our in-memory database.
420          */
421         kvp_update_mem_state(pool);
422         record = kvp_file_info[pool].records;
423
424         if (index >= kvp_file_info[pool].num_records) {
425                 return 1;
426         }
427
428         memcpy(key, record[index].key, key_size);
429         memcpy(value, record[index].value, value_size);
430         return 0;
431 }
432
433
434 void kvp_get_os_info(void)
435 {
436         FILE    *file;
437         char    *p, buf[512];
438
439         uname(&uts_buf);
440         os_build = uts_buf.release;
441         processor_arch = uts_buf.machine;
442
443         /*
444          * The current windows host (win7) expects the build
445          * string to be of the form: x.y.z
446          * Strip additional information we may have.
447          */
448         p = strchr(os_build, '-');
449         if (p)
450                 *p = '\0';
451
452         file = fopen("/etc/SuSE-release", "r");
453         if (file != NULL)
454                 goto kvp_osinfo_found;
455         file  = fopen("/etc/redhat-release", "r");
456         if (file != NULL)
457                 goto kvp_osinfo_found;
458         /*
459          * Add code for other supported platforms.
460          */
461
462         /*
463          * We don't have information about the os.
464          */
465         os_name = uts_buf.sysname;
466         return;
467
468 kvp_osinfo_found:
469         /* up to three lines */
470         p = fgets(buf, sizeof(buf), file);
471         if (p) {
472                 p = strchr(buf, '\n');
473                 if (p)
474                         *p = '\0';
475                 p = strdup(buf);
476                 if (!p)
477                         goto done;
478                 os_name = p;
479
480                 /* second line */
481                 p = fgets(buf, sizeof(buf), file);
482                 if (p) {
483                         p = strchr(buf, '\n');
484                         if (p)
485                                 *p = '\0';
486                         p = strdup(buf);
487                         if (!p)
488                                 goto done;
489                         os_major = p;
490
491                         /* third line */
492                         p = fgets(buf, sizeof(buf), file);
493                         if (p)  {
494                                 p = strchr(buf, '\n');
495                                 if (p)
496                                         *p = '\0';
497                                 p = strdup(buf);
498                                 if (p)
499                                         os_minor = p;
500                         }
501                 }
502         }
503
504 done:
505         fclose(file);
506         return;
507 }
508
509
510
511 /*
512  * Retrieve an interface name corresponding to the specified guid.
513  * If there is a match, the function returns a pointer
514  * to the interface name and if not, a NULL is returned.
515  * If a match is found, the caller is responsible for
516  * freeing the memory.
517  */
518
519 static char *kvp_get_if_name(char *guid)
520 {
521         DIR *dir;
522         struct dirent *entry;
523         FILE    *file;
524         char    *p, *q, *x;
525         char    *if_name = NULL;
526         char    buf[256];
527         char *kvp_net_dir = "/sys/class/net/";
528         char dev_id[256];
529
530         dir = opendir(kvp_net_dir);
531         if (dir == NULL)
532                 return NULL;
533
534         snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
535         q = dev_id + strlen(kvp_net_dir);
536
537         while ((entry = readdir(dir)) != NULL) {
538                 /*
539                  * Set the state for the next pass.
540                  */
541                 *q = '\0';
542                 strcat(dev_id, entry->d_name);
543                 strcat(dev_id, "/device/device_id");
544
545                 file = fopen(dev_id, "r");
546                 if (file == NULL)
547                         continue;
548
549                 p = fgets(buf, sizeof(buf), file);
550                 if (p) {
551                         x = strchr(p, '\n');
552                         if (x)
553                                 *x = '\0';
554
555                         if (!strcmp(p, guid)) {
556                                 /*
557                                  * Found the guid match; return the interface
558                                  * name. The caller will free the memory.
559                                  */
560                                 if_name = strdup(entry->d_name);
561                                 fclose(file);
562                                 break;
563                         }
564                 }
565                 fclose(file);
566         }
567
568         closedir(dir);
569         return if_name;
570 }
571
572 /*
573  * Retrieve the MAC address given the interface name.
574  */
575
576 static char *kvp_if_name_to_mac(char *if_name)
577 {
578         FILE    *file;
579         char    *p, *x;
580         char    buf[256];
581         char addr_file[256];
582         int i;
583         char *mac_addr = NULL;
584
585         snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
586                 if_name, "/address");
587
588         file = fopen(addr_file, "r");
589         if (file == NULL)
590                 return NULL;
591
592         p = fgets(buf, sizeof(buf), file);
593         if (p) {
594                 x = strchr(p, '\n');
595                 if (x)
596                         *x = '\0';
597                 for (i = 0; i < strlen(p); i++)
598                         p[i] = toupper(p[i]);
599                 mac_addr = strdup(p);
600         }
601
602         fclose(file);
603         return mac_addr;
604 }
605
606
607 /*
608  * Retrieve the interface name given tha MAC address.
609  */
610
611 static char *kvp_mac_to_if_name(char *mac)
612 {
613         DIR *dir;
614         struct dirent *entry;
615         FILE    *file;
616         char    *p, *q, *x;
617         char    *if_name = NULL;
618         char    buf[256];
619         char *kvp_net_dir = "/sys/class/net/";
620         char dev_id[256];
621         int i;
622
623         dir = opendir(kvp_net_dir);
624         if (dir == NULL)
625                 return NULL;
626
627         snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
628         q = dev_id + strlen(kvp_net_dir);
629
630         while ((entry = readdir(dir)) != NULL) {
631                 /*
632                  * Set the state for the next pass.
633                  */
634                 *q = '\0';
635
636                 strcat(dev_id, entry->d_name);
637                 strcat(dev_id, "/address");
638
639                 file = fopen(dev_id, "r");
640                 if (file == NULL)
641                         continue;
642
643                 p = fgets(buf, sizeof(buf), file);
644                 if (p) {
645                         x = strchr(p, '\n');
646                         if (x)
647                                 *x = '\0';
648
649                         for (i = 0; i < strlen(p); i++)
650                                 p[i] = toupper(p[i]);
651
652                         if (!strcmp(p, mac)) {
653                                 /*
654                                  * Found the MAC match; return the interface
655                                  * name. The caller will free the memory.
656                                  */
657                                 if_name = strdup(entry->d_name);
658                                 fclose(file);
659                                 break;
660                         }
661                 }
662                 fclose(file);
663         }
664
665         closedir(dir);
666         return if_name;
667 }
668
669
670 static void kvp_process_ipconfig_file(char *cmd,
671                                         char *config_buf, int len,
672                                         int element_size, int offset)
673 {
674         char buf[256];
675         char *p;
676         char *x;
677         FILE *file;
678
679         /*
680          * First execute the command.
681          */
682         file = popen(cmd, "r");
683         if (file == NULL)
684                 return;
685
686         if (offset == 0)
687                 memset(config_buf, 0, len);
688         while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
689                 if ((len - strlen(config_buf)) < (element_size + 1))
690                         break;
691
692                 x = strchr(p, '\n');
693                 *x = '\0';
694                 strcat(config_buf, p);
695                 strcat(config_buf, ";");
696         }
697         pclose(file);
698 }
699
700 static void kvp_get_ipconfig_info(char *if_name,
701                                  struct hv_kvp_ipaddr_value *buffer)
702 {
703         char cmd[512];
704         char dhcp_info[128];
705         char *p;
706         FILE *file;
707
708         /*
709          * Get the address of default gateway (ipv4).
710          */
711         sprintf(cmd, "%s %s", "ip route show dev", if_name);
712         strcat(cmd, " | awk '/default/ {print $3 }'");
713
714         /*
715          * Execute the command to gather gateway info.
716          */
717         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
718                                 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
719
720         /*
721          * Get the address of default gateway (ipv6).
722          */
723         sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
724         strcat(cmd, " | awk '/default/ {print $3 }'");
725
726         /*
727          * Execute the command to gather gateway info (ipv6).
728          */
729         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
730                                 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
731
732
733         /*
734          * Gather the DNS  state.
735          * Since there is no standard way to get this information
736          * across various distributions of interest; we just invoke
737          * an external script that needs to be ported across distros
738          * of interest.
739          *
740          * Following is the expected format of the information from the script:
741          *
742          * ipaddr1 (nameserver1)
743          * ipaddr2 (nameserver2)
744          * .
745          * .
746          */
747
748         sprintf(cmd, "%s",  "hv_get_dns_info");
749
750         /*
751          * Execute the command to gather DNS info.
752          */
753         kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
754                                 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
755
756         /*
757          * Gather the DHCP state.
758          * We will gather this state by invoking an external script.
759          * The parameter to the script is the interface name.
760          * Here is the expected output:
761          *
762          * Enabled: DHCP enabled.
763          */
764
765         sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
766
767         file = popen(cmd, "r");
768         if (file == NULL)
769                 return;
770
771         p = fgets(dhcp_info, sizeof(dhcp_info), file);
772         if (p == NULL) {
773                 pclose(file);
774                 return;
775         }
776
777         if (!strncmp(p, "Enabled", 7))
778                 buffer->dhcp_enabled = 1;
779         else
780                 buffer->dhcp_enabled = 0;
781
782         pclose(file);
783 }
784
785
786 static unsigned int hweight32(unsigned int *w)
787 {
788         unsigned int res = *w - ((*w >> 1) & 0x55555555);
789         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
790         res = (res + (res >> 4)) & 0x0F0F0F0F;
791         res = res + (res >> 8);
792         return (res + (res >> 16)) & 0x000000FF;
793 }
794
795 static int kvp_process_ip_address(void *addrp,
796                                 int family, char *buffer,
797                                 int length,  int *offset)
798 {
799         struct sockaddr_in *addr;
800         struct sockaddr_in6 *addr6;
801         int addr_length;
802         char tmp[50];
803         const char *str;
804
805         if (family == AF_INET) {
806                 addr = (struct sockaddr_in *)addrp;
807                 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
808                 addr_length = INET_ADDRSTRLEN;
809         } else {
810                 addr6 = (struct sockaddr_in6 *)addrp;
811                 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
812                 addr_length = INET6_ADDRSTRLEN;
813         }
814
815         if ((length - *offset) < addr_length + 1)
816                 return HV_E_FAIL;
817         if (str == NULL) {
818                 strcpy(buffer, "inet_ntop failed\n");
819                 return HV_E_FAIL;
820         }
821         if (*offset == 0)
822                 strcpy(buffer, tmp);
823         else
824                 strcat(buffer, tmp);
825         strcat(buffer, ";");
826
827         *offset += strlen(str) + 1;
828         return 0;
829 }
830
831 static int
832 kvp_get_ip_info(int family, char *if_name, int op,
833                  void  *out_buffer, int length)
834 {
835         struct ifaddrs *ifap;
836         struct ifaddrs *curp;
837         int offset = 0;
838         int sn_offset = 0;
839         int error = 0;
840         char *buffer;
841         struct hv_kvp_ipaddr_value *ip_buffer;
842         char cidr_mask[5]; /* /xyz */
843         int weight;
844         int i;
845         unsigned int *w;
846         char *sn_str;
847         struct sockaddr_in6 *addr6;
848
849         if (op == KVP_OP_ENUMERATE) {
850                 buffer = out_buffer;
851         } else {
852                 ip_buffer = out_buffer;
853                 buffer = (char *)ip_buffer->ip_addr;
854                 ip_buffer->addr_family = 0;
855         }
856         /*
857          * On entry into this function, the buffer is capable of holding the
858          * maximum key value.
859          */
860
861         if (getifaddrs(&ifap)) {
862                 strcpy(buffer, "getifaddrs failed\n");
863                 return HV_E_FAIL;
864         }
865
866         curp = ifap;
867         while (curp != NULL) {
868                 if (curp->ifa_addr == NULL) {
869                         curp = curp->ifa_next;
870                         continue;
871                 }
872
873                 if ((if_name != NULL) &&
874                         (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
875                         /*
876                          * We want info about a specific interface;
877                          * just continue.
878                          */
879                         curp = curp->ifa_next;
880                         continue;
881                 }
882
883                 /*
884                  * We only support two address families: AF_INET and AF_INET6.
885                  * If a family value of 0 is specified, we collect both
886                  * supported address families; if not we gather info on
887                  * the specified address family.
888                  */
889                 if ((family != 0) && (curp->ifa_addr->sa_family != family)) {
890                         curp = curp->ifa_next;
891                         continue;
892                 }
893                 if ((curp->ifa_addr->sa_family != AF_INET) &&
894                         (curp->ifa_addr->sa_family != AF_INET6)) {
895                         curp = curp->ifa_next;
896                         continue;
897                 }
898
899                 if (op == KVP_OP_GET_IP_INFO) {
900                         /*
901                          * Gather info other than the IP address.
902                          * IP address info will be gathered later.
903                          */
904                         if (curp->ifa_addr->sa_family == AF_INET) {
905                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
906                                 /*
907                                  * Get subnet info.
908                                  */
909                                 error = kvp_process_ip_address(
910                                                              curp->ifa_netmask,
911                                                              AF_INET,
912                                                              (char *)
913                                                              ip_buffer->sub_net,
914                                                              length,
915                                                              &sn_offset);
916                                 if (error)
917                                         goto gather_ipaddr;
918                         } else {
919                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
920
921                                 /*
922                                  * Get subnet info in CIDR format.
923                                  */
924                                 weight = 0;
925                                 sn_str = (char *)ip_buffer->sub_net;
926                                 addr6 = (struct sockaddr_in6 *)
927                                         curp->ifa_netmask;
928                                 w = addr6->sin6_addr.s6_addr32;
929
930                                 for (i = 0; i < 4; i++)
931                                         weight += hweight32(&w[i]);
932
933                                 sprintf(cidr_mask, "/%d", weight);
934                                 if ((length - sn_offset) <
935                                         (strlen(cidr_mask) + 1))
936                                         goto gather_ipaddr;
937
938                                 if (sn_offset == 0)
939                                         strcpy(sn_str, cidr_mask);
940                                 else
941                                         strcat(sn_str, cidr_mask);
942                                 strcat((char *)ip_buffer->sub_net, ";");
943                                 sn_offset += strlen(sn_str) + 1;
944                         }
945
946                         /*
947                          * Collect other ip related configuration info.
948                          */
949
950                         kvp_get_ipconfig_info(if_name, ip_buffer);
951                 }
952
953 gather_ipaddr:
954                 error = kvp_process_ip_address(curp->ifa_addr,
955                                                 curp->ifa_addr->sa_family,
956                                                 buffer,
957                                                 length, &offset);
958                 if (error)
959                         goto getaddr_done;
960
961                 curp = curp->ifa_next;
962         }
963
964 getaddr_done:
965         freeifaddrs(ifap);
966         return error;
967 }
968
969
970 static int expand_ipv6(char *addr, int type)
971 {
972         int ret;
973         struct in6_addr v6_addr;
974
975         ret = inet_pton(AF_INET6, addr, &v6_addr);
976
977         if (ret != 1) {
978                 if (type == NETMASK)
979                         return 1;
980                 return 0;
981         }
982
983         sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
984                 "%02x%02x:%02x%02x:%02x%02x",
985                 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
986                 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
987                 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
988                 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
989                 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
990                 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
991                 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
992                 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
993
994         return 1;
995
996 }
997
998 static int is_ipv4(char *addr)
999 {
1000         int ret;
1001         struct in_addr ipv4_addr;
1002
1003         ret = inet_pton(AF_INET, addr, &ipv4_addr);
1004
1005         if (ret == 1)
1006                 return 1;
1007         return 0;
1008 }
1009
1010 static int parse_ip_val_buffer(char *in_buf, int *offset,
1011                                 char *out_buf, int out_len)
1012 {
1013         char *x;
1014         char *start;
1015
1016         /*
1017          * in_buf has sequence of characters that are seperated by
1018          * the character ';'. The last sequence does not have the
1019          * terminating ";" character.
1020          */
1021         start = in_buf + *offset;
1022
1023         x = strchr(start, ';');
1024         if (x)
1025                 *x = 0;
1026         else
1027                 x = start + strlen(start);
1028
1029         if (strlen(start) != 0) {
1030                 int i = 0;
1031                 /*
1032                  * Get rid of leading spaces.
1033                  */
1034                 while (start[i] == ' ')
1035                         i++;
1036
1037                 if ((x - start) <= out_len) {
1038                         strcpy(out_buf, (start + i));
1039                         *offset += (x - start) + 1;
1040                         return 1;
1041                 }
1042         }
1043         return 0;
1044 }
1045
1046 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1047 {
1048         int ret;
1049
1050         ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1051
1052         if (ret < 0)
1053                 return HV_E_FAIL;
1054
1055         return 0;
1056 }
1057
1058
1059 static int process_ip_string(FILE *f, char *ip_string, int type)
1060 {
1061         int error = 0;
1062         char addr[INET6_ADDRSTRLEN];
1063         int i = 0;
1064         int j = 0;
1065         char str[256];
1066         char sub_str[10];
1067         int offset = 0;
1068
1069         memset(addr, 0, sizeof(addr));
1070
1071         while (parse_ip_val_buffer(ip_string, &offset, addr,
1072                                         (MAX_IP_ADDR_SIZE * 2))) {
1073
1074                 sub_str[0] = 0;
1075                 if (is_ipv4(addr)) {
1076                         switch (type) {
1077                         case IPADDR:
1078                                 snprintf(str, sizeof(str), "%s", "IPADDR");
1079                                 break;
1080                         case NETMASK:
1081                                 snprintf(str, sizeof(str), "%s", "NETMASK");
1082                                 break;
1083                         case GATEWAY:
1084                                 snprintf(str, sizeof(str), "%s", "GATEWAY");
1085                                 break;
1086                         case DNS:
1087                                 snprintf(str, sizeof(str), "%s", "DNS");
1088                                 break;
1089                         }
1090                         if (i != 0) {
1091                                 if (type != DNS) {
1092                                         snprintf(sub_str, sizeof(sub_str),
1093                                                 "_%d", i++);
1094                                 } else {
1095                                         snprintf(sub_str, sizeof(sub_str),
1096                                                 "%d", ++i);
1097                                 }
1098                         } else if (type == DNS) {
1099                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1100                         }
1101
1102
1103                 } else if (expand_ipv6(addr, type)) {
1104                         switch (type) {
1105                         case IPADDR:
1106                                 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1107                                 break;
1108                         case NETMASK:
1109                                 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1110                                 break;
1111                         case GATEWAY:
1112                                 snprintf(str, sizeof(str), "%s",
1113                                         "IPV6_DEFAULTGW");
1114                                 break;
1115                         case DNS:
1116                                 snprintf(str, sizeof(str), "%s",  "DNS");
1117                                 break;
1118                         }
1119                         if ((j != 0) || (type == DNS)) {
1120                                 if (type != DNS) {
1121                                         snprintf(sub_str, sizeof(sub_str),
1122                                                 "_%d", j++);
1123                                 } else {
1124                                         snprintf(sub_str, sizeof(sub_str),
1125                                                 "%d", ++i);
1126                                 }
1127                         } else if (type == DNS) {
1128                                 snprintf(sub_str, sizeof(sub_str),
1129                                         "%d", ++i);
1130                         }
1131                 } else {
1132                         return  HV_INVALIDARG;
1133                 }
1134
1135                 error = kvp_write_file(f, str, sub_str, addr);
1136                 if (error)
1137                         return error;
1138                 memset(addr, 0, sizeof(addr));
1139         }
1140
1141         return 0;
1142 }
1143
1144 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1145 {
1146         int error = 0;
1147         char if_file[128];
1148         FILE *file;
1149         char cmd[512];
1150         char *mac_addr;
1151
1152         /*
1153          * Set the configuration for the specified interface with
1154          * the information provided. Since there is no standard
1155          * way to configure an interface, we will have an external
1156          * script that does the job of configuring the interface and
1157          * flushing the configuration.
1158          *
1159          * The parameters passed to this external script are:
1160          * 1. A configuration file that has the specified configuration.
1161          *
1162          * We will embed the name of the interface in the configuration
1163          * file: ifcfg-ethx (where ethx is the interface name).
1164          *
1165          * The information provided here may be more than what is needed
1166          * in a given distro to configure the interface and so are free
1167          * ignore information that may not be relevant.
1168          *
1169          * Here is the format of the ip configuration file:
1170          *
1171          * HWADDR=macaddr
1172          * IF_NAME=interface name
1173          * DHCP=yes (This is optional; if yes, DHCP is configured)
1174          *
1175          * IPADDR=ipaddr1
1176          * IPADDR_1=ipaddr2
1177          * IPADDR_x=ipaddry (where y = x + 1)
1178          *
1179          * NETMASK=netmask1
1180          * NETMASK_x=netmasky (where y = x + 1)
1181          *
1182          * GATEWAY=ipaddr1
1183          * GATEWAY_x=ipaddry (where y = x + 1)
1184          *
1185          * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1186          *
1187          * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1188          * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1189          * IPV6NETMASK.
1190          *
1191          * The host can specify multiple ipv4 and ipv6 addresses to be
1192          * configured for the interface. Furthermore, the configuration
1193          * needs to be persistent. A subsequent GET call on the interface
1194          * is expected to return the configuration that is set via the SET
1195          * call.
1196          */
1197
1198         snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1199                 "hyperv/ifcfg-", if_name);
1200
1201         file = fopen(if_file, "w");
1202
1203         if (file == NULL) {
1204                 syslog(LOG_ERR, "Failed to open config file");
1205                 return HV_E_FAIL;
1206         }
1207
1208         /*
1209          * First write out the MAC address.
1210          */
1211
1212         mac_addr = kvp_if_name_to_mac(if_name);
1213         if (mac_addr == NULL) {
1214                 error = HV_E_FAIL;
1215                 goto setval_error;
1216         }
1217
1218         error = kvp_write_file(file, "HWADDR", "", mac_addr);
1219         if (error)
1220                 goto setval_error;
1221
1222         error = kvp_write_file(file, "IF_NAME", "", if_name);
1223         if (error)
1224                 goto setval_error;
1225
1226         if (new_val->dhcp_enabled) {
1227                 error = kvp_write_file(file, "DHCP", "", "yes");
1228                 if (error)
1229                         goto setval_error;
1230
1231                 /*
1232                  * We are done!.
1233                  */
1234                 goto setval_done;
1235         }
1236
1237         /*
1238          * Write the configuration for ipaddress, netmask, gateway and
1239          * name servers.
1240          */
1241
1242         error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1243         if (error)
1244                 goto setval_error;
1245
1246         error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1247         if (error)
1248                 goto setval_error;
1249
1250         error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1251         if (error)
1252                 goto setval_error;
1253
1254         error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1255         if (error)
1256                 goto setval_error;
1257
1258 setval_done:
1259         free(mac_addr);
1260         fclose(file);
1261
1262         /*
1263          * Now that we have populated the configuration file,
1264          * invoke the external script to do its magic.
1265          */
1266
1267         snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
1268         system(cmd);
1269         return 0;
1270
1271 setval_error:
1272         syslog(LOG_ERR, "Failed to write config file");
1273         free(mac_addr);
1274         fclose(file);
1275         return error;
1276 }
1277
1278
1279 static int
1280 kvp_get_domain_name(char *buffer, int length)
1281 {
1282         struct addrinfo hints, *info ;
1283         int error = 0;
1284
1285         gethostname(buffer, length);
1286         memset(&hints, 0, sizeof(hints));
1287         hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1288         hints.ai_socktype = SOCK_STREAM;
1289         hints.ai_flags = AI_CANONNAME;
1290
1291         error = getaddrinfo(buffer, NULL, &hints, &info);
1292         if (error != 0) {
1293                 strcpy(buffer, "getaddrinfo failed\n");
1294                 return error;
1295         }
1296         strcpy(buffer, info->ai_canonname);
1297         freeaddrinfo(info);
1298         return error;
1299 }
1300
1301 static int
1302 netlink_send(int fd, struct cn_msg *msg)
1303 {
1304         struct nlmsghdr *nlh;
1305         unsigned int size;
1306         struct msghdr message;
1307         char buffer[64];
1308         struct iovec iov[2];
1309
1310         size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
1311
1312         nlh = (struct nlmsghdr *)buffer;
1313         nlh->nlmsg_seq = 0;
1314         nlh->nlmsg_pid = getpid();
1315         nlh->nlmsg_type = NLMSG_DONE;
1316         nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
1317         nlh->nlmsg_flags = 0;
1318
1319         iov[0].iov_base = nlh;
1320         iov[0].iov_len = sizeof(*nlh);
1321
1322         iov[1].iov_base = msg;
1323         iov[1].iov_len = size;
1324
1325         memset(&message, 0, sizeof(message));
1326         message.msg_name = &addr;
1327         message.msg_namelen = sizeof(addr);
1328         message.msg_iov = iov;
1329         message.msg_iovlen = 2;
1330
1331         return sendmsg(fd, &message, 0);
1332 }
1333
1334 int main(void)
1335 {
1336         int fd, len, sock_opt;
1337         int error;
1338         struct cn_msg *message;
1339         struct pollfd pfd;
1340         struct nlmsghdr *incoming_msg;
1341         struct cn_msg   *incoming_cn_msg;
1342         struct hv_kvp_msg *hv_msg;
1343         char    *p;
1344         char    *key_value;
1345         char    *key_name;
1346         int     op;
1347         int     pool;
1348         char    *if_name;
1349         struct hv_kvp_ipaddr_value *kvp_ip_val;
1350
1351         daemon(1, 0);
1352         openlog("KVP", 0, LOG_USER);
1353         syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1354         /*
1355          * Retrieve OS release information.
1356          */
1357         kvp_get_os_info();
1358
1359         if (kvp_file_init()) {
1360                 syslog(LOG_ERR, "Failed to initialize the pools");
1361                 exit(-1);
1362         }
1363
1364         fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
1365         if (fd < 0) {
1366                 syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
1367                 exit(-1);
1368         }
1369         addr.nl_family = AF_NETLINK;
1370         addr.nl_pad = 0;
1371         addr.nl_pid = 0;
1372         addr.nl_groups = CN_KVP_IDX;
1373
1374
1375         error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
1376         if (error < 0) {
1377                 syslog(LOG_ERR, "bind failed; error:%d", error);
1378                 close(fd);
1379                 exit(-1);
1380         }
1381         sock_opt = addr.nl_groups;
1382         setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt));
1383         /*
1384          * Register ourselves with the kernel.
1385          */
1386         message = (struct cn_msg *)kvp_send_buffer;
1387         message->id.idx = CN_KVP_IDX;
1388         message->id.val = CN_KVP_VAL;
1389
1390         hv_msg = (struct hv_kvp_msg *)message->data;
1391         hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1392         message->ack = 0;
1393         message->len = sizeof(struct hv_kvp_msg);
1394
1395         len = netlink_send(fd, message);
1396         if (len < 0) {
1397                 syslog(LOG_ERR, "netlink_send failed; error:%d", len);
1398                 close(fd);
1399                 exit(-1);
1400         }
1401
1402         pfd.fd = fd;
1403
1404         while (1) {
1405                 struct sockaddr *addr_p = (struct sockaddr *) &addr;
1406                 socklen_t addr_l = sizeof(addr);
1407                 pfd.events = POLLIN;
1408                 pfd.revents = 0;
1409                 poll(&pfd, 1, -1);
1410
1411                 len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
1412                                 addr_p, &addr_l);
1413
1414                 if (len < 0 || addr.nl_pid) {
1415                         syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
1416                                         addr.nl_pid, errno, strerror(errno));
1417                         close(fd);
1418                         return -1;
1419                 }
1420
1421                 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
1422                 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
1423                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1424
1425                 /*
1426                  * We will use the KVP header information to pass back
1427                  * the error from this daemon. So, first copy the state
1428                  * and set the error code to success.
1429                  */
1430                 op = hv_msg->kvp_hdr.operation;
1431                 pool = hv_msg->kvp_hdr.pool;
1432                 hv_msg->error = HV_S_OK;
1433
1434                 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1435                         /*
1436                          * Driver is registering with us; stash away the version
1437                          * information.
1438                          */
1439                         in_hand_shake = 0;
1440                         p = (char *)hv_msg->body.kvp_register.version;
1441                         lic_version = malloc(strlen(p) + 1);
1442                         if (lic_version) {
1443                                 strcpy(lic_version, p);
1444                                 syslog(LOG_INFO, "KVP LIC Version: %s",
1445                                         lic_version);
1446                         } else {
1447                                 syslog(LOG_ERR, "malloc failed");
1448                         }
1449                         continue;
1450                 }
1451
1452                 switch (op) {
1453                 case KVP_OP_GET_IP_INFO:
1454                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1455                         if_name =
1456                         kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1457
1458                         if (if_name == NULL) {
1459                                 /*
1460                                  * We could not map the mac address to an
1461                                  * interface name; return error.
1462                                  */
1463                                 hv_msg->error = HV_E_FAIL;
1464                                 break;
1465                         }
1466                         error = kvp_get_ip_info(
1467                                                 0, if_name, KVP_OP_GET_IP_INFO,
1468                                                 kvp_ip_val,
1469                                                 (MAX_IP_ADDR_SIZE * 2));
1470
1471                         if (error)
1472                                 hv_msg->error = error;
1473
1474                         free(if_name);
1475                         break;
1476
1477                 case KVP_OP_SET_IP_INFO:
1478                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1479                         if_name = kvp_get_if_name(
1480                                         (char *)kvp_ip_val->adapter_id);
1481                         if (if_name == NULL) {
1482                                 /*
1483                                  * We could not map the guid to an
1484                                  * interface name; return error.
1485                                  */
1486                                 hv_msg->error = HV_GUID_NOTFOUND;
1487                                 break;
1488                         }
1489                         error = kvp_set_ip_info(if_name, kvp_ip_val);
1490                         if (error)
1491                                 hv_msg->error = error;
1492
1493                         free(if_name);
1494                         break;
1495
1496                 case KVP_OP_SET:
1497                         if (kvp_key_add_or_modify(pool,
1498                                         hv_msg->body.kvp_set.data.key,
1499                                         hv_msg->body.kvp_set.data.key_size,
1500                                         hv_msg->body.kvp_set.data.value,
1501                                         hv_msg->body.kvp_set.data.value_size))
1502                                         hv_msg->error = HV_S_CONT;
1503                         break;
1504
1505                 case KVP_OP_GET:
1506                         if (kvp_get_value(pool,
1507                                         hv_msg->body.kvp_set.data.key,
1508                                         hv_msg->body.kvp_set.data.key_size,
1509                                         hv_msg->body.kvp_set.data.value,
1510                                         hv_msg->body.kvp_set.data.value_size))
1511                                         hv_msg->error = HV_S_CONT;
1512                         break;
1513
1514                 case KVP_OP_DELETE:
1515                         if (kvp_key_delete(pool,
1516                                         hv_msg->body.kvp_delete.key,
1517                                         hv_msg->body.kvp_delete.key_size))
1518                                         hv_msg->error = HV_S_CONT;
1519                         break;
1520
1521                 default:
1522                         break;
1523                 }
1524
1525                 if (op != KVP_OP_ENUMERATE)
1526                         goto kvp_done;
1527
1528                 /*
1529                  * If the pool is KVP_POOL_AUTO, dynamically generate
1530                  * both the key and the value; if not read from the
1531                  * appropriate pool.
1532                  */
1533                 if (pool != KVP_POOL_AUTO) {
1534                         if (kvp_pool_enumerate(pool,
1535                                         hv_msg->body.kvp_enum_data.index,
1536                                         hv_msg->body.kvp_enum_data.data.key,
1537                                         HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1538                                         hv_msg->body.kvp_enum_data.data.value,
1539                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1540                                         hv_msg->error = HV_S_CONT;
1541                         goto kvp_done;
1542                 }
1543
1544                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1545                 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1546                 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1547
1548                 switch (hv_msg->body.kvp_enum_data.index) {
1549                 case FullyQualifiedDomainName:
1550                         kvp_get_domain_name(key_value,
1551                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1552                         strcpy(key_name, "FullyQualifiedDomainName");
1553                         break;
1554                 case IntegrationServicesVersion:
1555                         strcpy(key_name, "IntegrationServicesVersion");
1556                         strcpy(key_value, lic_version);
1557                         break;
1558                 case NetworkAddressIPv4:
1559                         kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1560                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1561                         strcpy(key_name, "NetworkAddressIPv4");
1562                         break;
1563                 case NetworkAddressIPv6:
1564                         kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1565                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1566                         strcpy(key_name, "NetworkAddressIPv6");
1567                         break;
1568                 case OSBuildNumber:
1569                         strcpy(key_value, os_build);
1570                         strcpy(key_name, "OSBuildNumber");
1571                         break;
1572                 case OSName:
1573                         strcpy(key_value, os_name);
1574                         strcpy(key_name, "OSName");
1575                         break;
1576                 case OSMajorVersion:
1577                         strcpy(key_value, os_major);
1578                         strcpy(key_name, "OSMajorVersion");
1579                         break;
1580                 case OSMinorVersion:
1581                         strcpy(key_value, os_minor);
1582                         strcpy(key_name, "OSMinorVersion");
1583                         break;
1584                 case OSVersion:
1585                         strcpy(key_value, os_build);
1586                         strcpy(key_name, "OSVersion");
1587                         break;
1588                 case ProcessorArchitecture:
1589                         strcpy(key_value, processor_arch);
1590                         strcpy(key_name, "ProcessorArchitecture");
1591                         break;
1592                 default:
1593                         hv_msg->error = HV_S_CONT;
1594                         break;
1595                 }
1596                 /*
1597                  * Send the value back to the kernel. The response is
1598                  * already in the receive buffer. Update the cn_msg header to
1599                  * reflect the key value that has been added to the message
1600                  */
1601 kvp_done:
1602
1603                 incoming_cn_msg->id.idx = CN_KVP_IDX;
1604                 incoming_cn_msg->id.val = CN_KVP_VAL;
1605                 incoming_cn_msg->ack = 0;
1606                 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
1607
1608                 len = netlink_send(fd, incoming_cn_msg);
1609                 if (len < 0) {
1610                         syslog(LOG_ERR, "net_link send failed; error:%d", len);
1611                         exit(-1);
1612                 }
1613         }
1614
1615 }