Tools: hv: Prepare to expand kvp_get_ip_address() functionality
[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 <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
45 /*
46  * KVP protocol: The user mode component first registers with the
47  * the kernel component. Subsequently, the kernel component requests, data
48  * for the specified keys. In response to this message the user mode component
49  * fills in the value corresponding to the specified key. We overload the
50  * sequence field in the cn_msg header to define our KVP message types.
51  *
52  * We use this infrastructure for also supporting queries from user mode
53  * application for state that may be maintained in the KVP kernel component.
54  *
55  */
56
57
58 enum key_index {
59         FullyQualifiedDomainName = 0,
60         IntegrationServicesVersion, /*This key is serviced in the kernel*/
61         NetworkAddressIPv4,
62         NetworkAddressIPv6,
63         OSBuildNumber,
64         OSName,
65         OSMajorVersion,
66         OSMinorVersion,
67         OSVersion,
68         ProcessorArchitecture
69 };
70
71 static char kvp_send_buffer[4096];
72 static char kvp_recv_buffer[4096 * 2];
73 static struct sockaddr_nl addr;
74 static int in_hand_shake = 1;
75
76 static char *os_name = "";
77 static char *os_major = "";
78 static char *os_minor = "";
79 static char *processor_arch;
80 static char *os_build;
81 static char *lic_version = "Unknown version";
82 static struct utsname uts_buf;
83
84
85 #define MAX_FILE_NAME 100
86 #define ENTRIES_PER_BLOCK 50
87
88 struct kvp_record {
89         __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
90         __u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
91 };
92
93 struct kvp_file_state {
94         int fd;
95         int num_blocks;
96         struct kvp_record *records;
97         int num_records;
98         __u8 fname[MAX_FILE_NAME];
99 };
100
101 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
102
103 static void kvp_acquire_lock(int pool)
104 {
105         struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
106         fl.l_pid = getpid();
107
108         if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
109                 syslog(LOG_ERR, "Failed to acquire the lock pool: %d", pool);
110                 exit(-1);
111         }
112 }
113
114 static void kvp_release_lock(int pool)
115 {
116         struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
117         fl.l_pid = getpid();
118
119         if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
120                 perror("fcntl");
121                 syslog(LOG_ERR, "Failed to release the lock pool: %d", pool);
122                 exit(-1);
123         }
124 }
125
126 static void kvp_update_file(int pool)
127 {
128         FILE *filep;
129         size_t bytes_written;
130
131         /*
132          * We are going to write our in-memory registry out to
133          * disk; acquire the lock first.
134          */
135         kvp_acquire_lock(pool);
136
137         filep = fopen(kvp_file_info[pool].fname, "w");
138         if (!filep) {
139                 kvp_release_lock(pool);
140                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
141                 exit(-1);
142         }
143
144         bytes_written = fwrite(kvp_file_info[pool].records,
145                                 sizeof(struct kvp_record),
146                                 kvp_file_info[pool].num_records, filep);
147
148         fflush(filep);
149         kvp_release_lock(pool);
150 }
151
152 static void kvp_update_mem_state(int pool)
153 {
154         FILE *filep;
155         size_t records_read = 0;
156         struct kvp_record *record = kvp_file_info[pool].records;
157         struct kvp_record *readp;
158         int num_blocks = kvp_file_info[pool].num_blocks;
159         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
160
161         kvp_acquire_lock(pool);
162
163         filep = fopen(kvp_file_info[pool].fname, "r");
164         if (!filep) {
165                 kvp_release_lock(pool);
166                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
167                 exit(-1);
168         }
169         while (!feof(filep)) {
170                 readp = &record[records_read];
171                 records_read += fread(readp, sizeof(struct kvp_record),
172                                         ENTRIES_PER_BLOCK * num_blocks,
173                                         filep);
174
175                 if (!feof(filep)) {
176                         /*
177                          * We have more data to read.
178                          */
179                         num_blocks++;
180                         record = realloc(record, alloc_unit * num_blocks);
181
182                         if (record == NULL) {
183                                 syslog(LOG_ERR, "malloc failed");
184                                 exit(-1);
185                         }
186                         continue;
187                 }
188                 break;
189         }
190
191         kvp_file_info[pool].num_blocks = num_blocks;
192         kvp_file_info[pool].records = record;
193         kvp_file_info[pool].num_records = records_read;
194
195         kvp_release_lock(pool);
196 }
197 static int kvp_file_init(void)
198 {
199         int ret, fd;
200         FILE *filep;
201         size_t records_read;
202         __u8 *fname;
203         struct kvp_record *record;
204         struct kvp_record *readp;
205         int num_blocks;
206         int i;
207         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
208
209         if (access("/var/opt/hyperv", F_OK)) {
210                 if (mkdir("/var/opt/hyperv", S_IRUSR | S_IWUSR | S_IROTH)) {
211                         syslog(LOG_ERR, " Failed to create /var/opt/hyperv");
212                         exit(-1);
213                 }
214         }
215
216         for (i = 0; i < KVP_POOL_COUNT; i++) {
217                 fname = kvp_file_info[i].fname;
218                 records_read = 0;
219                 num_blocks = 1;
220                 sprintf(fname, "/var/opt/hyperv/.kvp_pool_%d", i);
221                 fd = open(fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IROTH);
222
223                 if (fd == -1)
224                         return 1;
225
226
227                 filep = fopen(fname, "r");
228                 if (!filep)
229                         return 1;
230
231                 record = malloc(alloc_unit * num_blocks);
232                 if (record == NULL) {
233                         fclose(filep);
234                         return 1;
235                 }
236                 while (!feof(filep)) {
237                         readp = &record[records_read];
238                         records_read += fread(readp, sizeof(struct kvp_record),
239                                         ENTRIES_PER_BLOCK,
240                                         filep);
241
242                         if (!feof(filep)) {
243                                 /*
244                                  * We have more data to read.
245                                  */
246                                 num_blocks++;
247                                 record = realloc(record, alloc_unit *
248                                                 num_blocks);
249                                 if (record == NULL) {
250                                         fclose(filep);
251                                         return 1;
252                                 }
253                                 continue;
254                         }
255                         break;
256                 }
257                 kvp_file_info[i].fd = fd;
258                 kvp_file_info[i].num_blocks = num_blocks;
259                 kvp_file_info[i].records = record;
260                 kvp_file_info[i].num_records = records_read;
261                 fclose(filep);
262
263         }
264
265         return 0;
266 }
267
268 static int kvp_key_delete(int pool, __u8 *key, int key_size)
269 {
270         int i;
271         int j, k;
272         int num_records;
273         struct kvp_record *record;
274
275         /*
276          * First update the in-memory state.
277          */
278         kvp_update_mem_state(pool);
279
280         num_records = kvp_file_info[pool].num_records;
281         record = kvp_file_info[pool].records;
282
283         for (i = 0; i < num_records; i++) {
284                 if (memcmp(key, record[i].key, key_size))
285                         continue;
286                 /*
287                  * Found a match; just move the remaining
288                  * entries up.
289                  */
290                 if (i == num_records) {
291                         kvp_file_info[pool].num_records--;
292                         kvp_update_file(pool);
293                         return 0;
294                 }
295
296                 j = i;
297                 k = j + 1;
298                 for (; k < num_records; k++) {
299                         strcpy(record[j].key, record[k].key);
300                         strcpy(record[j].value, record[k].value);
301                         j++;
302                 }
303
304                 kvp_file_info[pool].num_records--;
305                 kvp_update_file(pool);
306                 return 0;
307         }
308         return 1;
309 }
310
311 static int kvp_key_add_or_modify(int pool, __u8 *key, int key_size, __u8 *value,
312                         int value_size)
313 {
314         int i;
315         int j, k;
316         int num_records;
317         struct kvp_record *record;
318         int num_blocks;
319
320         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
321                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
322                 return 1;
323
324         /*
325          * First update the in-memory state.
326          */
327         kvp_update_mem_state(pool);
328
329         num_records = kvp_file_info[pool].num_records;
330         record = kvp_file_info[pool].records;
331         num_blocks = kvp_file_info[pool].num_blocks;
332
333         for (i = 0; i < num_records; i++) {
334                 if (memcmp(key, record[i].key, key_size))
335                         continue;
336                 /*
337                  * Found a match; just update the value -
338                  * this is the modify case.
339                  */
340                 memcpy(record[i].value, value, value_size);
341                 kvp_update_file(pool);
342                 return 0;
343         }
344
345         /*
346          * Need to add a new entry;
347          */
348         if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
349                 /* Need to allocate a larger array for reg entries. */
350                 record = realloc(record, sizeof(struct kvp_record) *
351                          ENTRIES_PER_BLOCK * (num_blocks + 1));
352
353                 if (record == NULL)
354                         return 1;
355                 kvp_file_info[pool].num_blocks++;
356
357         }
358         memcpy(record[i].value, value, value_size);
359         memcpy(record[i].key, key, key_size);
360         kvp_file_info[pool].records = record;
361         kvp_file_info[pool].num_records++;
362         kvp_update_file(pool);
363         return 0;
364 }
365
366 static int kvp_get_value(int pool, __u8 *key, int key_size, __u8 *value,
367                         int value_size)
368 {
369         int i;
370         int num_records;
371         struct kvp_record *record;
372
373         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
374                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
375                 return 1;
376
377         /*
378          * First update the in-memory state.
379          */
380         kvp_update_mem_state(pool);
381
382         num_records = kvp_file_info[pool].num_records;
383         record = kvp_file_info[pool].records;
384
385         for (i = 0; i < num_records; i++) {
386                 if (memcmp(key, record[i].key, key_size))
387                         continue;
388                 /*
389                  * Found a match; just copy the value out.
390                  */
391                 memcpy(value, record[i].value, value_size);
392                 return 0;
393         }
394
395         return 1;
396 }
397
398 static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
399                                 __u8 *value, int value_size)
400 {
401         struct kvp_record *record;
402
403         /*
404          * First update our in-memory database.
405          */
406         kvp_update_mem_state(pool);
407         record = kvp_file_info[pool].records;
408
409         if (index >= kvp_file_info[pool].num_records) {
410                 return 1;
411         }
412
413         memcpy(key, record[index].key, key_size);
414         memcpy(value, record[index].value, value_size);
415         return 0;
416 }
417
418
419 void kvp_get_os_info(void)
420 {
421         FILE    *file;
422         char    *p, buf[512];
423
424         uname(&uts_buf);
425         os_build = uts_buf.release;
426         processor_arch = uts_buf.machine;
427
428         /*
429          * The current windows host (win7) expects the build
430          * string to be of the form: x.y.z
431          * Strip additional information we may have.
432          */
433         p = strchr(os_build, '-');
434         if (p)
435                 *p = '\0';
436
437         file = fopen("/etc/SuSE-release", "r");
438         if (file != NULL)
439                 goto kvp_osinfo_found;
440         file  = fopen("/etc/redhat-release", "r");
441         if (file != NULL)
442                 goto kvp_osinfo_found;
443         /*
444          * Add code for other supported platforms.
445          */
446
447         /*
448          * We don't have information about the os.
449          */
450         os_name = uts_buf.sysname;
451         return;
452
453 kvp_osinfo_found:
454         /* up to three lines */
455         p = fgets(buf, sizeof(buf), file);
456         if (p) {
457                 p = strchr(buf, '\n');
458                 if (p)
459                         *p = '\0';
460                 p = strdup(buf);
461                 if (!p)
462                         goto done;
463                 os_name = p;
464
465                 /* second line */
466                 p = fgets(buf, sizeof(buf), file);
467                 if (p) {
468                         p = strchr(buf, '\n');
469                         if (p)
470                                 *p = '\0';
471                         p = strdup(buf);
472                         if (!p)
473                                 goto done;
474                         os_major = p;
475
476                         /* third line */
477                         p = fgets(buf, sizeof(buf), file);
478                         if (p)  {
479                                 p = strchr(buf, '\n');
480                                 if (p)
481                                         *p = '\0';
482                                 p = strdup(buf);
483                                 if (p)
484                                         os_minor = p;
485                         }
486                 }
487         }
488
489 done:
490         fclose(file);
491         return;
492 }
493
494 static int
495 kvp_get_ip_address(int family, char *if_name, int op,
496                  void  *out_buffer, int length)
497 {
498         struct ifaddrs *ifap;
499         struct ifaddrs *curp;
500         int ipv4_len = strlen("255.255.255.255") + 1;
501         int ipv6_len = strlen("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")+1;
502         int offset = 0;
503         const char *str;
504         char tmp[50];
505         int error = 0;
506         char *buffer;
507         struct hv_kvp_ipaddr_value *ip_buffer;
508
509         if (op == KVP_OP_ENUMERATE) {
510                 buffer = out_buffer;
511         } else {
512                 ip_buffer = out_buffer;
513                 buffer = (char *)ip_buffer->ip_addr;
514                 ip_buffer->addr_family = 0;
515         }
516         /*
517          * On entry into this function, the buffer is capable of holding the
518          * maximum key value.
519          */
520
521         if (getifaddrs(&ifap)) {
522                 strcpy(buffer, "getifaddrs failed\n");
523                 return 1;
524         }
525
526         curp = ifap;
527         while (curp != NULL) {
528                 if (curp->ifa_addr == NULL) {
529                         curp = curp->ifa_next;
530                         continue;
531                 }
532
533                 if ((if_name != NULL) &&
534                         (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
535                         /*
536                          * We want info about a specific interface;
537                          * just continue.
538                          */
539                         curp = curp->ifa_next;
540                         continue;
541                 }
542
543                 /*
544                  * We only support two address families: AF_INET and AF_INET6.
545                  * If a family value of 0 is specified, we collect both
546                  * supported address families; if not we gather info on
547                  * the specified address family.
548                  */
549                 if ((family != 0) && (curp->ifa_addr->sa_family != family)) {
550                         curp = curp->ifa_next;
551                         continue;
552                 }
553                 if ((curp->ifa_addr->sa_family != AF_INET) &&
554                         (curp->ifa_addr->sa_family != AF_INET6)) {
555                         curp = curp->ifa_next;
556                         continue;
557                 }
558
559                 if ((curp->ifa_addr->sa_family == AF_INET) &&
560                         ((family == AF_INET) || (family == 0))) {
561                         struct sockaddr_in *addr =
562                         (struct sockaddr_in *) curp->ifa_addr;
563
564                         str = inet_ntop(AF_INET, &addr->sin_addr, tmp, 50);
565                         if (str == NULL) {
566                                 strcpy(buffer, "inet_ntop failed\n");
567                                 error = 1;
568                                 goto getaddr_done;
569                         }
570                         if (offset == 0)
571                                 strcpy(buffer, tmp);
572                         else
573                                 strcat(buffer, tmp);
574                         strcat(buffer, ";");
575
576                         offset += strlen(str) + 1;
577                         if ((length - offset) < (ipv4_len + 1))
578                                 goto getaddr_done;
579
580                 } else if ((family == AF_INET6) || (family == 0)) {
581
582                         /*
583                          * We only support AF_INET and AF_INET6
584                          * and the list of addresses is separated by a ";".
585                          */
586                         struct sockaddr_in6 *addr =
587                                 (struct sockaddr_in6 *) curp->ifa_addr;
588
589                         str = inet_ntop(AF_INET6,
590                                         &addr->sin6_addr.s6_addr,
591                                         tmp, 50);
592                         if (str == NULL) {
593                                 strcpy(buffer, "inet_ntop failed\n");
594                                 error = 1;
595                                 goto getaddr_done;
596                         }
597                         if (offset == 0)
598                                 strcpy(buffer, tmp);
599                         else
600                                 strcat(buffer, tmp);
601                         strcat(buffer, ";");
602                         offset += strlen(str) + 1;
603                         if ((length - offset) < (ipv6_len + 1))
604                                 goto getaddr_done;
605
606                 }
607
608
609                 curp = curp->ifa_next;
610         }
611
612 getaddr_done:
613         freeifaddrs(ifap);
614         return error;
615 }
616
617
618 static int
619 kvp_get_domain_name(char *buffer, int length)
620 {
621         struct addrinfo hints, *info ;
622         int error = 0;
623
624         gethostname(buffer, length);
625         memset(&hints, 0, sizeof(hints));
626         hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
627         hints.ai_socktype = SOCK_STREAM;
628         hints.ai_flags = AI_CANONNAME;
629
630         error = getaddrinfo(buffer, NULL, &hints, &info);
631         if (error != 0) {
632                 strcpy(buffer, "getaddrinfo failed\n");
633                 return error;
634         }
635         strcpy(buffer, info->ai_canonname);
636         freeaddrinfo(info);
637         return error;
638 }
639
640 static int
641 netlink_send(int fd, struct cn_msg *msg)
642 {
643         struct nlmsghdr *nlh;
644         unsigned int size;
645         struct msghdr message;
646         char buffer[64];
647         struct iovec iov[2];
648
649         size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
650
651         nlh = (struct nlmsghdr *)buffer;
652         nlh->nlmsg_seq = 0;
653         nlh->nlmsg_pid = getpid();
654         nlh->nlmsg_type = NLMSG_DONE;
655         nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
656         nlh->nlmsg_flags = 0;
657
658         iov[0].iov_base = nlh;
659         iov[0].iov_len = sizeof(*nlh);
660
661         iov[1].iov_base = msg;
662         iov[1].iov_len = size;
663
664         memset(&message, 0, sizeof(message));
665         message.msg_name = &addr;
666         message.msg_namelen = sizeof(addr);
667         message.msg_iov = iov;
668         message.msg_iovlen = 2;
669
670         return sendmsg(fd, &message, 0);
671 }
672
673 int main(void)
674 {
675         int fd, len, sock_opt;
676         int error;
677         struct cn_msg *message;
678         struct pollfd pfd;
679         struct nlmsghdr *incoming_msg;
680         struct cn_msg   *incoming_cn_msg;
681         struct hv_kvp_msg *hv_msg;
682         char    *p;
683         char    *key_value;
684         char    *key_name;
685         int     op;
686         int     pool;
687
688         daemon(1, 0);
689         openlog("KVP", 0, LOG_USER);
690         syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
691         /*
692          * Retrieve OS release information.
693          */
694         kvp_get_os_info();
695
696         if (kvp_file_init()) {
697                 syslog(LOG_ERR, "Failed to initialize the pools");
698                 exit(-1);
699         }
700
701         fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
702         if (fd < 0) {
703                 syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
704                 exit(-1);
705         }
706         addr.nl_family = AF_NETLINK;
707         addr.nl_pad = 0;
708         addr.nl_pid = 0;
709         addr.nl_groups = CN_KVP_IDX;
710
711
712         error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
713         if (error < 0) {
714                 syslog(LOG_ERR, "bind failed; error:%d", error);
715                 close(fd);
716                 exit(-1);
717         }
718         sock_opt = addr.nl_groups;
719         setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt));
720         /*
721          * Register ourselves with the kernel.
722          */
723         message = (struct cn_msg *)kvp_send_buffer;
724         message->id.idx = CN_KVP_IDX;
725         message->id.val = CN_KVP_VAL;
726
727         hv_msg = (struct hv_kvp_msg *)message->data;
728         hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
729         message->ack = 0;
730         message->len = sizeof(struct hv_kvp_msg);
731
732         len = netlink_send(fd, message);
733         if (len < 0) {
734                 syslog(LOG_ERR, "netlink_send failed; error:%d", len);
735                 close(fd);
736                 exit(-1);
737         }
738
739         pfd.fd = fd;
740
741         while (1) {
742                 struct sockaddr *addr_p = (struct sockaddr *) &addr;
743                 socklen_t addr_l = sizeof(addr);
744                 pfd.events = POLLIN;
745                 pfd.revents = 0;
746                 poll(&pfd, 1, -1);
747
748                 len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
749                                 addr_p, &addr_l);
750
751                 if (len < 0 || addr.nl_pid) {
752                         syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
753                                         addr.nl_pid, errno, strerror(errno));
754                         close(fd);
755                         return -1;
756                 }
757
758                 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
759                 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
760                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
761
762                 /*
763                  * We will use the KVP header information to pass back
764                  * the error from this daemon. So, first copy the state
765                  * and set the error code to success.
766                  */
767                 op = hv_msg->kvp_hdr.operation;
768                 pool = hv_msg->kvp_hdr.pool;
769                 hv_msg->error = HV_S_OK;
770
771                 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
772                         /*
773                          * Driver is registering with us; stash away the version
774                          * information.
775                          */
776                         in_hand_shake = 0;
777                         p = (char *)hv_msg->body.kvp_register.version;
778                         lic_version = malloc(strlen(p) + 1);
779                         if (lic_version) {
780                                 strcpy(lic_version, p);
781                                 syslog(LOG_INFO, "KVP LIC Version: %s",
782                                         lic_version);
783                         } else {
784                                 syslog(LOG_ERR, "malloc failed");
785                         }
786                         continue;
787                 }
788
789                 switch (op) {
790                 case KVP_OP_SET:
791                         if (kvp_key_add_or_modify(pool,
792                                         hv_msg->body.kvp_set.data.key,
793                                         hv_msg->body.kvp_set.data.key_size,
794                                         hv_msg->body.kvp_set.data.value,
795                                         hv_msg->body.kvp_set.data.value_size))
796                                         hv_msg->error = HV_S_CONT;
797                         break;
798
799                 case KVP_OP_GET:
800                         if (kvp_get_value(pool,
801                                         hv_msg->body.kvp_set.data.key,
802                                         hv_msg->body.kvp_set.data.key_size,
803                                         hv_msg->body.kvp_set.data.value,
804                                         hv_msg->body.kvp_set.data.value_size))
805                                         hv_msg->error = HV_S_CONT;
806                         break;
807
808                 case KVP_OP_DELETE:
809                         if (kvp_key_delete(pool,
810                                         hv_msg->body.kvp_delete.key,
811                                         hv_msg->body.kvp_delete.key_size))
812                                         hv_msg->error = HV_S_CONT;
813                         break;
814
815                 default:
816                         break;
817                 }
818
819                 if (op != KVP_OP_ENUMERATE)
820                         goto kvp_done;
821
822                 /*
823                  * If the pool is KVP_POOL_AUTO, dynamically generate
824                  * both the key and the value; if not read from the
825                  * appropriate pool.
826                  */
827                 if (pool != KVP_POOL_AUTO) {
828                         if (kvp_pool_enumerate(pool,
829                                         hv_msg->body.kvp_enum_data.index,
830                                         hv_msg->body.kvp_enum_data.data.key,
831                                         HV_KVP_EXCHANGE_MAX_KEY_SIZE,
832                                         hv_msg->body.kvp_enum_data.data.value,
833                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
834                                         hv_msg->error = HV_S_CONT;
835                         goto kvp_done;
836                 }
837
838                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
839                 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
840                 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
841
842                 switch (hv_msg->body.kvp_enum_data.index) {
843                 case FullyQualifiedDomainName:
844                         kvp_get_domain_name(key_value,
845                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
846                         strcpy(key_name, "FullyQualifiedDomainName");
847                         break;
848                 case IntegrationServicesVersion:
849                         strcpy(key_name, "IntegrationServicesVersion");
850                         strcpy(key_value, lic_version);
851                         break;
852                 case NetworkAddressIPv4:
853                         kvp_get_ip_address(AF_INET, NULL, KVP_OP_ENUMERATE,
854                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
855                         strcpy(key_name, "NetworkAddressIPv4");
856                         break;
857                 case NetworkAddressIPv6:
858                         kvp_get_ip_address(AF_INET6, NULL, KVP_OP_ENUMERATE,
859                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
860                         strcpy(key_name, "NetworkAddressIPv6");
861                         break;
862                 case OSBuildNumber:
863                         strcpy(key_value, os_build);
864                         strcpy(key_name, "OSBuildNumber");
865                         break;
866                 case OSName:
867                         strcpy(key_value, os_name);
868                         strcpy(key_name, "OSName");
869                         break;
870                 case OSMajorVersion:
871                         strcpy(key_value, os_major);
872                         strcpy(key_name, "OSMajorVersion");
873                         break;
874                 case OSMinorVersion:
875                         strcpy(key_value, os_minor);
876                         strcpy(key_name, "OSMinorVersion");
877                         break;
878                 case OSVersion:
879                         strcpy(key_value, os_build);
880                         strcpy(key_name, "OSVersion");
881                         break;
882                 case ProcessorArchitecture:
883                         strcpy(key_value, processor_arch);
884                         strcpy(key_name, "ProcessorArchitecture");
885                         break;
886                 default:
887                         hv_msg->error = HV_S_CONT;
888                         break;
889                 }
890                 /*
891                  * Send the value back to the kernel. The response is
892                  * already in the receive buffer. Update the cn_msg header to
893                  * reflect the key value that has been added to the message
894                  */
895 kvp_done:
896
897                 incoming_cn_msg->id.idx = CN_KVP_IDX;
898                 incoming_cn_msg->id.val = CN_KVP_VAL;
899                 incoming_cn_msg->ack = 0;
900                 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
901
902                 len = netlink_send(fd, incoming_cn_msg);
903                 if (len < 0) {
904                         syslog(LOG_ERR, "net_link send failed; error:%d", len);
905                         exit(-1);
906                 }
907         }
908
909 }