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TOMOYO Linux Cross Reference
Linux/tools/hv/hv_kvp_daemon.c

Version: ~ [ linux-5.5-rc1 ] ~ [ linux-5.4.2 ] ~ [ linux-5.3.15 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.88 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.158 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.206 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.206 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.78 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
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  1 /*
  2  * An implementation of key value pair (KVP) functionality for Linux.
  3  *
  4  *
  5  * Copyright (C) 2010, Novell, Inc.
  6  * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
  7  *
  8  * This program is free software; you can redistribute it and/or modify it
  9  * under the terms of the GNU General Public License version 2 as published
 10  * by the Free Software Foundation.
 11  *
 12  * This program is distributed in the hope that it will be useful, but
 13  * WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 15  * NON INFRINGEMENT.  See the GNU General Public License for more
 16  * details.
 17  *
 18  * You should have received a copy of the GNU General Public License
 19  * along with this program; if not, write to the Free Software
 20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 21  *
 22  */
 23 
 24 
 25 #include <sys/poll.h>
 26 #include <sys/utsname.h>
 27 #include <stdio.h>
 28 #include <stdlib.h>
 29 #include <unistd.h>
 30 #include <string.h>
 31 #include <ctype.h>
 32 #include <errno.h>
 33 #include <arpa/inet.h>
 34 #include <linux/hyperv.h>
 35 #include <ifaddrs.h>
 36 #include <netdb.h>
 37 #include <syslog.h>
 38 #include <sys/stat.h>
 39 #include <fcntl.h>
 40 #include <dirent.h>
 41 #include <net/if.h>
 42 #include <limits.h>
 43 #include <getopt.h>
 44 
 45 /*
 46  * KVP protocol: The user mode component first registers with the
 47  * the kernel component. Subsequently, the kernel component requests, data
 48  * for the specified keys. In response to this message the user mode component
 49  * fills in the value corresponding to the specified key. We overload the
 50  * sequence field in the cn_msg header to define our KVP message types.
 51  *
 52  * We use this infrastructure for also supporting queries from user mode
 53  * application for state that may be maintained in the KVP kernel component.
 54  *
 55  */
 56 
 57 
 58 enum key_index {
 59         FullyQualifiedDomainName = 0,
 60         IntegrationServicesVersion, /*This key is serviced in the kernel*/
 61         NetworkAddressIPv4,
 62         NetworkAddressIPv6,
 63         OSBuildNumber,
 64         OSName,
 65         OSMajorVersion,
 66         OSMinorVersion,
 67         OSVersion,
 68         ProcessorArchitecture
 69 };
 70 
 71 
 72 enum {
 73         IPADDR = 0,
 74         NETMASK,
 75         GATEWAY,
 76         DNS
 77 };
 78 
 79 static int in_hand_shake = 1;
 80 
 81 static char *os_name = "";
 82 static char *os_major = "";
 83 static char *os_minor = "";
 84 static char *processor_arch;
 85 static char *os_build;
 86 static char *os_version;
 87 static char *lic_version = "Unknown version";
 88 static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
 89 static struct utsname uts_buf;
 90 
 91 /*
 92  * The location of the interface configuration file.
 93  */
 94 
 95 #define KVP_CONFIG_LOC  "/var/lib/hyperv"
 96 
 97 #ifndef KVP_SCRIPTS_PATH
 98 #define KVP_SCRIPTS_PATH "/usr/libexec/hypervkvpd/"
 99 #endif
100 
101 #define KVP_NET_DIR "/sys/class/net/"
102 
103 #define MAX_FILE_NAME 100
104 #define ENTRIES_PER_BLOCK 50
105 
106 struct kvp_record {
107         char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
108         char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
109 };
110 
111 struct kvp_file_state {
112         int fd;
113         int num_blocks;
114         struct kvp_record *records;
115         int num_records;
116         char fname[MAX_FILE_NAME];
117 };
118 
119 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
120 
121 static void kvp_acquire_lock(int pool)
122 {
123         struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
124         fl.l_pid = getpid();
125 
126         if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
127                 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
128                                 errno, strerror(errno));
129                 exit(EXIT_FAILURE);
130         }
131 }
132 
133 static void kvp_release_lock(int pool)
134 {
135         struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
136         fl.l_pid = getpid();
137 
138         if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
139                 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
140                                 errno, strerror(errno));
141                 exit(EXIT_FAILURE);
142         }
143 }
144 
145 static void kvp_update_file(int pool)
146 {
147         FILE *filep;
148 
149         /*
150          * We are going to write our in-memory registry out to
151          * disk; acquire the lock first.
152          */
153         kvp_acquire_lock(pool);
154 
155         filep = fopen(kvp_file_info[pool].fname, "we");
156         if (!filep) {
157                 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
158                                 errno, strerror(errno));
159                 kvp_release_lock(pool);
160                 exit(EXIT_FAILURE);
161         }
162 
163         fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record),
164                                 kvp_file_info[pool].num_records, filep);
165 
166         if (ferror(filep) || fclose(filep)) {
167                 kvp_release_lock(pool);
168                 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
169                 exit(EXIT_FAILURE);
170         }
171 
172         kvp_release_lock(pool);
173 }
174 
175 static void kvp_update_mem_state(int pool)
176 {
177         FILE *filep;
178         size_t records_read = 0;
179         struct kvp_record *record = kvp_file_info[pool].records;
180         struct kvp_record *readp;
181         int num_blocks = kvp_file_info[pool].num_blocks;
182         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
183 
184         kvp_acquire_lock(pool);
185 
186         filep = fopen(kvp_file_info[pool].fname, "re");
187         if (!filep) {
188                 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
189                                 errno, strerror(errno));
190                 kvp_release_lock(pool);
191                 exit(EXIT_FAILURE);
192         }
193         for (;;) {
194                 readp = &record[records_read];
195                 records_read += fread(readp, sizeof(struct kvp_record),
196                                 ENTRIES_PER_BLOCK * num_blocks - records_read,
197                                 filep);
198 
199                 if (ferror(filep)) {
200                         syslog(LOG_ERR,
201                                 "Failed to read file, pool: %d; error: %d %s",
202                                  pool, errno, strerror(errno));
203                         kvp_release_lock(pool);
204                         exit(EXIT_FAILURE);
205                 }
206 
207                 if (!feof(filep)) {
208                         /*
209                          * We have more data to read.
210                          */
211                         num_blocks++;
212                         record = realloc(record, alloc_unit * num_blocks);
213 
214                         if (record == NULL) {
215                                 syslog(LOG_ERR, "malloc failed");
216                                 kvp_release_lock(pool);
217                                 exit(EXIT_FAILURE);
218                         }
219                         continue;
220                 }
221                 break;
222         }
223 
224         kvp_file_info[pool].num_blocks = num_blocks;
225         kvp_file_info[pool].records = record;
226         kvp_file_info[pool].num_records = records_read;
227 
228         fclose(filep);
229         kvp_release_lock(pool);
230 }
231 
232 static int kvp_file_init(void)
233 {
234         int  fd;
235         char *fname;
236         int i;
237         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
238 
239         if (access(KVP_CONFIG_LOC, F_OK)) {
240                 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
241                         syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
242                                         errno, strerror(errno));
243                         exit(EXIT_FAILURE);
244                 }
245         }
246 
247         for (i = 0; i < KVP_POOL_COUNT; i++) {
248                 fname = kvp_file_info[i].fname;
249                 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
250                 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
251 
252                 if (fd == -1)
253                         return 1;
254 
255                 kvp_file_info[i].fd = fd;
256                 kvp_file_info[i].num_blocks = 1;
257                 kvp_file_info[i].records = malloc(alloc_unit);
258                 if (kvp_file_info[i].records == NULL)
259                         return 1;
260                 kvp_file_info[i].num_records = 0;
261                 kvp_update_mem_state(i);
262         }
263 
264         return 0;
265 }
266 
267 static int kvp_key_delete(int pool, const __u8 *key, int key_size)
268 {
269         int i;
270         int j, k;
271         int num_records;
272         struct kvp_record *record;
273 
274         /*
275          * First update the in-memory state.
276          */
277         kvp_update_mem_state(pool);
278 
279         num_records = kvp_file_info[pool].num_records;
280         record = kvp_file_info[pool].records;
281 
282         for (i = 0; i < num_records; i++) {
283                 if (memcmp(key, record[i].key, key_size))
284                         continue;
285                 /*
286                  * Found a match; just move the remaining
287                  * entries up.
288                  */
289                 if (i == (num_records - 1)) {
290                         kvp_file_info[pool].num_records--;
291                         kvp_update_file(pool);
292                         return 0;
293                 }
294 
295                 j = i;
296                 k = j + 1;
297                 for (; k < num_records; k++) {
298                         strcpy(record[j].key, record[k].key);
299                         strcpy(record[j].value, record[k].value);
300                         j++;
301                 }
302 
303                 kvp_file_info[pool].num_records--;
304                 kvp_update_file(pool);
305                 return 0;
306         }
307         return 1;
308 }
309 
310 static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size,
311                                  const __u8 *value, int value_size)
312 {
313         int i;
314         int num_records;
315         struct kvp_record *record;
316         int num_blocks;
317 
318         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
319                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
320                 return 1;
321 
322         /*
323          * First update the in-memory state.
324          */
325         kvp_update_mem_state(pool);
326 
327         num_records = kvp_file_info[pool].num_records;
328         record = kvp_file_info[pool].records;
329         num_blocks = kvp_file_info[pool].num_blocks;
330 
331         for (i = 0; i < num_records; i++) {
332                 if (memcmp(key, record[i].key, key_size))
333                         continue;
334                 /*
335                  * Found a match; just update the value -
336                  * this is the modify case.
337                  */
338                 memcpy(record[i].value, value, value_size);
339                 kvp_update_file(pool);
340                 return 0;
341         }
342 
343         /*
344          * Need to add a new entry;
345          */
346         if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
347                 /* Need to allocate a larger array for reg entries. */
348                 record = realloc(record, sizeof(struct kvp_record) *
349                          ENTRIES_PER_BLOCK * (num_blocks + 1));
350 
351                 if (record == NULL)
352                         return 1;
353                 kvp_file_info[pool].num_blocks++;
354 
355         }
356         memcpy(record[i].value, value, value_size);
357         memcpy(record[i].key, key, key_size);
358         kvp_file_info[pool].records = record;
359         kvp_file_info[pool].num_records++;
360         kvp_update_file(pool);
361         return 0;
362 }
363 
364 static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value,
365                         int value_size)
366 {
367         int i;
368         int num_records;
369         struct kvp_record *record;
370 
371         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
372                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
373                 return 1;
374 
375         /*
376          * First update the in-memory state.
377          */
378         kvp_update_mem_state(pool);
379 
380         num_records = kvp_file_info[pool].num_records;
381         record = kvp_file_info[pool].records;
382 
383         for (i = 0; i < num_records; i++) {
384                 if (memcmp(key, record[i].key, key_size))
385                         continue;
386                 /*
387                  * Found a match; just copy the value out.
388                  */
389                 memcpy(value, record[i].value, value_size);
390                 return 0;
391         }
392 
393         return 1;
394 }
395 
396 static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
397                                 __u8 *value, int value_size)
398 {
399         struct kvp_record *record;
400 
401         /*
402          * First update our in-memory database.
403          */
404         kvp_update_mem_state(pool);
405         record = kvp_file_info[pool].records;
406 
407         if (index >= kvp_file_info[pool].num_records) {
408                 return 1;
409         }
410 
411         memcpy(key, record[index].key, key_size);
412         memcpy(value, record[index].value, value_size);
413         return 0;
414 }
415 
416 
417 void kvp_get_os_info(void)
418 {
419         FILE    *file;
420         char    *p, buf[512];
421 
422         uname(&uts_buf);
423         os_version = uts_buf.release;
424         os_build = strdup(uts_buf.release);
425 
426         os_name = uts_buf.sysname;
427         processor_arch = uts_buf.machine;
428 
429         /*
430          * The current windows host (win7) expects the build
431          * string to be of the form: x.y.z
432          * Strip additional information we may have.
433          */
434         p = strchr(os_version, '-');
435         if (p)
436                 *p = '\0';
437 
438         /*
439          * Parse the /etc/os-release file if present:
440          * http://www.freedesktop.org/software/systemd/man/os-release.html
441          */
442         file = fopen("/etc/os-release", "r");
443         if (file != NULL) {
444                 while (fgets(buf, sizeof(buf), file)) {
445                         char *value, *q;
446 
447                         /* Ignore comments */
448                         if (buf[0] == '#')
449                                 continue;
450 
451                         /* Split into name=value */
452                         p = strchr(buf, '=');
453                         if (!p)
454                                 continue;
455                         *p++ = 0;
456 
457                         /* Remove quotes and newline; un-escape */
458                         value = p;
459                         q = p;
460                         while (*p) {
461                                 if (*p == '\\') {
462                                         ++p;
463                                         if (!*p)
464                                                 break;
465                                         *q++ = *p++;
466                                 } else if (*p == '\'' || *p == '"' ||
467                                            *p == '\n') {
468                                         ++p;
469                                 } else {
470                                         *q++ = *p++;
471                                 }
472                         }
473                         *q = 0;
474 
475                         if (!strcmp(buf, "NAME")) {
476                                 p = strdup(value);
477                                 if (!p)
478                                         break;
479                                 os_name = p;
480                         } else if (!strcmp(buf, "VERSION_ID")) {
481                                 p = strdup(value);
482                                 if (!p)
483                                         break;
484                                 os_major = p;
485                         }
486                 }
487                 fclose(file);
488                 return;
489         }
490 
491         /* Fallback for older RH/SUSE releases */
492         file = fopen("/etc/SuSE-release", "r");
493         if (file != NULL)
494                 goto kvp_osinfo_found;
495         file  = fopen("/etc/redhat-release", "r");
496         if (file != NULL)
497                 goto kvp_osinfo_found;
498 
499         /*
500          * We don't have information about the os.
501          */
502         return;
503 
504 kvp_osinfo_found:
505         /* up to three lines */
506         p = fgets(buf, sizeof(buf), file);
507         if (p) {
508                 p = strchr(buf, '\n');
509                 if (p)
510                         *p = '\0';
511                 p = strdup(buf);
512                 if (!p)
513                         goto done;
514                 os_name = p;
515 
516                 /* second line */
517                 p = fgets(buf, sizeof(buf), file);
518                 if (p) {
519                         p = strchr(buf, '\n');
520                         if (p)
521                                 *p = '\0';
522                         p = strdup(buf);
523                         if (!p)
524                                 goto done;
525                         os_major = p;
526 
527                         /* third line */
528                         p = fgets(buf, sizeof(buf), file);
529                         if (p)  {
530                                 p = strchr(buf, '\n');
531                                 if (p)
532                                         *p = '\0';
533                                 p = strdup(buf);
534                                 if (p)
535                                         os_minor = p;
536                         }
537                 }
538         }
539 
540 done:
541         fclose(file);
542         return;
543 }
544 
545 
546 
547 /*
548  * Retrieve an interface name corresponding to the specified guid.
549  * If there is a match, the function returns a pointer
550  * to the interface name and if not, a NULL is returned.
551  * If a match is found, the caller is responsible for
552  * freeing the memory.
553  */
554 
555 static char *kvp_get_if_name(char *guid)
556 {
557         DIR *dir;
558         struct dirent *entry;
559         FILE    *file;
560         char    *p, *x;
561         char    *if_name = NULL;
562         char    buf[256];
563         char dev_id[PATH_MAX];
564 
565         dir = opendir(KVP_NET_DIR);
566         if (dir == NULL)
567                 return NULL;
568 
569         while ((entry = readdir(dir)) != NULL) {
570                 /*
571                  * Set the state for the next pass.
572                  */
573                 snprintf(dev_id, sizeof(dev_id), "%s%s/device/device_id",
574                          KVP_NET_DIR, entry->d_name);
575 
576                 file = fopen(dev_id, "r");
577                 if (file == NULL)
578                         continue;
579 
580                 p = fgets(buf, sizeof(buf), file);
581                 if (p) {
582                         x = strchr(p, '\n');
583                         if (x)
584                                 *x = '\0';
585 
586                         if (!strcmp(p, guid)) {
587                                 /*
588                                  * Found the guid match; return the interface
589                                  * name. The caller will free the memory.
590                                  */
591                                 if_name = strdup(entry->d_name);
592                                 fclose(file);
593                                 break;
594                         }
595                 }
596                 fclose(file);
597         }
598 
599         closedir(dir);
600         return if_name;
601 }
602 
603 /*
604  * Retrieve the MAC address given the interface name.
605  */
606 
607 static char *kvp_if_name_to_mac(char *if_name)
608 {
609         FILE    *file;
610         char    *p, *x;
611         char    buf[256];
612         char addr_file[PATH_MAX];
613         unsigned int i;
614         char *mac_addr = NULL;
615 
616         snprintf(addr_file, sizeof(addr_file), "%s%s%s", KVP_NET_DIR,
617                  if_name, "/address");
618 
619         file = fopen(addr_file, "r");
620         if (file == NULL)
621                 return NULL;
622 
623         p = fgets(buf, sizeof(buf), file);
624         if (p) {
625                 x = strchr(p, '\n');
626                 if (x)
627                         *x = '\0';
628                 for (i = 0; i < strlen(p); i++)
629                         p[i] = toupper(p[i]);
630                 mac_addr = strdup(p);
631         }
632 
633         fclose(file);
634         return mac_addr;
635 }
636 
637 static void kvp_process_ipconfig_file(char *cmd,
638                                         char *config_buf, unsigned int len,
639                                         int element_size, int offset)
640 {
641         char buf[256];
642         char *p;
643         char *x;
644         FILE *file;
645 
646         /*
647          * First execute the command.
648          */
649         file = popen(cmd, "r");
650         if (file == NULL)
651                 return;
652 
653         if (offset == 0)
654                 memset(config_buf, 0, len);
655         while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
656                 if (len < strlen(config_buf) + element_size + 1)
657                         break;
658 
659                 x = strchr(p, '\n');
660                 if (x)
661                         *x = '\0';
662 
663                 strcat(config_buf, p);
664                 strcat(config_buf, ";");
665         }
666         pclose(file);
667 }
668 
669 static void kvp_get_ipconfig_info(char *if_name,
670                                  struct hv_kvp_ipaddr_value *buffer)
671 {
672         char cmd[512];
673         char dhcp_info[128];
674         char *p;
675         FILE *file;
676 
677         /*
678          * Get the address of default gateway (ipv4).
679          */
680         sprintf(cmd, "%s %s", "ip route show dev", if_name);
681         strcat(cmd, " | awk '/default/ {print $3 }'");
682 
683         /*
684          * Execute the command to gather gateway info.
685          */
686         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
687                                 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
688 
689         /*
690          * Get the address of default gateway (ipv6).
691          */
692         sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
693         strcat(cmd, " | awk '/default/ {print $3 }'");
694 
695         /*
696          * Execute the command to gather gateway info (ipv6).
697          */
698         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
699                                 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
700 
701 
702         /*
703          * Gather the DNS  state.
704          * Since there is no standard way to get this information
705          * across various distributions of interest; we just invoke
706          * an external script that needs to be ported across distros
707          * of interest.
708          *
709          * Following is the expected format of the information from the script:
710          *
711          * ipaddr1 (nameserver1)
712          * ipaddr2 (nameserver2)
713          * .
714          * .
715          */
716 
717         sprintf(cmd, KVP_SCRIPTS_PATH "%s",  "hv_get_dns_info");
718 
719         /*
720          * Execute the command to gather DNS info.
721          */
722         kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
723                                 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
724 
725         /*
726          * Gather the DHCP state.
727          * We will gather this state by invoking an external script.
728          * The parameter to the script is the interface name.
729          * Here is the expected output:
730          *
731          * Enabled: DHCP enabled.
732          */
733 
734         sprintf(cmd, KVP_SCRIPTS_PATH "%s %s", "hv_get_dhcp_info", if_name);
735 
736         file = popen(cmd, "r");
737         if (file == NULL)
738                 return;
739 
740         p = fgets(dhcp_info, sizeof(dhcp_info), file);
741         if (p == NULL) {
742                 pclose(file);
743                 return;
744         }
745 
746         if (!strncmp(p, "Enabled", 7))
747                 buffer->dhcp_enabled = 1;
748         else
749                 buffer->dhcp_enabled = 0;
750 
751         pclose(file);
752 }
753 
754 
755 static unsigned int hweight32(unsigned int *w)
756 {
757         unsigned int res = *w - ((*w >> 1) & 0x55555555);
758         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
759         res = (res + (res >> 4)) & 0x0F0F0F0F;
760         res = res + (res >> 8);
761         return (res + (res >> 16)) & 0x000000FF;
762 }
763 
764 static int kvp_process_ip_address(void *addrp,
765                                 int family, char *buffer,
766                                 int length,  int *offset)
767 {
768         struct sockaddr_in *addr;
769         struct sockaddr_in6 *addr6;
770         int addr_length;
771         char tmp[50];
772         const char *str;
773 
774         if (family == AF_INET) {
775                 addr = (struct sockaddr_in *)addrp;
776                 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
777                 addr_length = INET_ADDRSTRLEN;
778         } else {
779                 addr6 = (struct sockaddr_in6 *)addrp;
780                 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
781                 addr_length = INET6_ADDRSTRLEN;
782         }
783 
784         if ((length - *offset) < addr_length + 2)
785                 return HV_E_FAIL;
786         if (str == NULL) {
787                 strcpy(buffer, "inet_ntop failed\n");
788                 return HV_E_FAIL;
789         }
790         if (*offset == 0)
791                 strcpy(buffer, tmp);
792         else {
793                 strcat(buffer, ";");
794                 strcat(buffer, tmp);
795         }
796 
797         *offset += strlen(str) + 1;
798 
799         return 0;
800 }
801 
802 static int
803 kvp_get_ip_info(int family, char *if_name, int op,
804                  void  *out_buffer, unsigned int length)
805 {
806         struct ifaddrs *ifap;
807         struct ifaddrs *curp;
808         int offset = 0;
809         int sn_offset = 0;
810         int error = 0;
811         char *buffer;
812         struct hv_kvp_ipaddr_value *ip_buffer;
813         char cidr_mask[5]; /* /xyz */
814         int weight;
815         int i;
816         unsigned int *w;
817         char *sn_str;
818         struct sockaddr_in6 *addr6;
819 
820         if (op == KVP_OP_ENUMERATE) {
821                 buffer = out_buffer;
822         } else {
823                 ip_buffer = out_buffer;
824                 buffer = (char *)ip_buffer->ip_addr;
825                 ip_buffer->addr_family = 0;
826         }
827         /*
828          * On entry into this function, the buffer is capable of holding the
829          * maximum key value.
830          */
831 
832         if (getifaddrs(&ifap)) {
833                 strcpy(buffer, "getifaddrs failed\n");
834                 return HV_E_FAIL;
835         }
836 
837         curp = ifap;
838         while (curp != NULL) {
839                 if (curp->ifa_addr == NULL) {
840                         curp = curp->ifa_next;
841                         continue;
842                 }
843 
844                 if ((if_name != NULL) &&
845                         (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
846                         /*
847                          * We want info about a specific interface;
848                          * just continue.
849                          */
850                         curp = curp->ifa_next;
851                         continue;
852                 }
853 
854                 /*
855                  * We only support two address families: AF_INET and AF_INET6.
856                  * If a family value of 0 is specified, we collect both
857                  * supported address families; if not we gather info on
858                  * the specified address family.
859                  */
860                 if ((((family != 0) &&
861                          (curp->ifa_addr->sa_family != family))) ||
862                          (curp->ifa_flags & IFF_LOOPBACK)) {
863                         curp = curp->ifa_next;
864                         continue;
865                 }
866                 if ((curp->ifa_addr->sa_family != AF_INET) &&
867                         (curp->ifa_addr->sa_family != AF_INET6)) {
868                         curp = curp->ifa_next;
869                         continue;
870                 }
871 
872                 if (op == KVP_OP_GET_IP_INFO) {
873                         /*
874                          * Gather info other than the IP address.
875                          * IP address info will be gathered later.
876                          */
877                         if (curp->ifa_addr->sa_family == AF_INET) {
878                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
879                                 /*
880                                  * Get subnet info.
881                                  */
882                                 error = kvp_process_ip_address(
883                                                              curp->ifa_netmask,
884                                                              AF_INET,
885                                                              (char *)
886                                                              ip_buffer->sub_net,
887                                                              length,
888                                                              &sn_offset);
889                                 if (error)
890                                         goto gather_ipaddr;
891                         } else {
892                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
893 
894                                 /*
895                                  * Get subnet info in CIDR format.
896                                  */
897                                 weight = 0;
898                                 sn_str = (char *)ip_buffer->sub_net;
899                                 addr6 = (struct sockaddr_in6 *)
900                                         curp->ifa_netmask;
901                                 w = addr6->sin6_addr.s6_addr32;
902 
903                                 for (i = 0; i < 4; i++)
904                                         weight += hweight32(&w[i]);
905 
906                                 sprintf(cidr_mask, "/%d", weight);
907                                 if (length < sn_offset + strlen(cidr_mask) + 1)
908                                         goto gather_ipaddr;
909 
910                                 if (sn_offset == 0)
911                                         strcpy(sn_str, cidr_mask);
912                                 else {
913                                         strcat((char *)ip_buffer->sub_net, ";");
914                                         strcat(sn_str, cidr_mask);
915                                 }
916                                 sn_offset += strlen(sn_str) + 1;
917                         }
918 
919                         /*
920                          * Collect other ip related configuration info.
921                          */
922 
923                         kvp_get_ipconfig_info(if_name, ip_buffer);
924                 }
925 
926 gather_ipaddr:
927                 error = kvp_process_ip_address(curp->ifa_addr,
928                                                 curp->ifa_addr->sa_family,
929                                                 buffer,
930                                                 length, &offset);
931                 if (error)
932                         goto getaddr_done;
933 
934                 curp = curp->ifa_next;
935         }
936 
937 getaddr_done:
938         freeifaddrs(ifap);
939         return error;
940 }
941 
942 /*
943  * Retrieve the IP given the MAC address.
944  */
945 static int kvp_mac_to_ip(struct hv_kvp_ipaddr_value *kvp_ip_val)
946 {
947         char *mac = (char *)kvp_ip_val->adapter_id;
948         DIR *dir;
949         struct dirent *entry;
950         FILE    *file;
951         char    *p, *x;
952         char    *if_name = NULL;
953         char    buf[256];
954         char dev_id[PATH_MAX];
955         unsigned int i;
956         int error = HV_E_FAIL;
957 
958         dir = opendir(KVP_NET_DIR);
959         if (dir == NULL)
960                 return HV_E_FAIL;
961 
962         while ((entry = readdir(dir)) != NULL) {
963                 /*
964                  * Set the state for the next pass.
965                  */
966                 snprintf(dev_id, sizeof(dev_id), "%s%s/address", KVP_NET_DIR,
967                          entry->d_name);
968 
969                 file = fopen(dev_id, "r");
970                 if (file == NULL)
971                         continue;
972 
973                 p = fgets(buf, sizeof(buf), file);
974                 fclose(file);
975                 if (!p)
976                         continue;
977 
978                 x = strchr(p, '\n');
979                 if (x)
980                         *x = '\0';
981 
982                 for (i = 0; i < strlen(p); i++)
983                         p[i] = toupper(p[i]);
984 
985                 if (strcmp(p, mac))
986                         continue;
987 
988                 /*
989                  * Found the MAC match.
990                  * A NIC (e.g. VF) matching the MAC, but without IP, is skipped.
991                  */
992                 if_name = entry->d_name;
993                 if (!if_name)
994                         continue;
995 
996                 error = kvp_get_ip_info(0, if_name, KVP_OP_GET_IP_INFO,
997                                         kvp_ip_val, MAX_IP_ADDR_SIZE * 2);
998 
999                 if (!error && strlen((char *)kvp_ip_val->ip_addr))
1000                         break;
1001         }
1002 
1003         closedir(dir);
1004         return error;
1005 }
1006 
1007 static int expand_ipv6(char *addr, int type)
1008 {
1009         int ret;
1010         struct in6_addr v6_addr;
1011 
1012         ret = inet_pton(AF_INET6, addr, &v6_addr);
1013 
1014         if (ret != 1) {
1015                 if (type == NETMASK)
1016                         return 1;
1017                 return 0;
1018         }
1019 
1020         sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1021                 "%02x%02x:%02x%02x:%02x%02x",
1022                 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1023                 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1024                 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1025                 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1026                 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1027                 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1028                 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1029                 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1030 
1031         return 1;
1032 
1033 }
1034 
1035 static int is_ipv4(char *addr)
1036 {
1037         int ret;
1038         struct in_addr ipv4_addr;
1039 
1040         ret = inet_pton(AF_INET, addr, &ipv4_addr);
1041 
1042         if (ret == 1)
1043                 return 1;
1044         return 0;
1045 }
1046 
1047 static int parse_ip_val_buffer(char *in_buf, int *offset,
1048                                 char *out_buf, int out_len)
1049 {
1050         char *x;
1051         char *start;
1052 
1053         /*
1054          * in_buf has sequence of characters that are seperated by
1055          * the character ';'. The last sequence does not have the
1056          * terminating ";" character.
1057          */
1058         start = in_buf + *offset;
1059 
1060         x = strchr(start, ';');
1061         if (x)
1062                 *x = 0;
1063         else
1064                 x = start + strlen(start);
1065 
1066         if (strlen(start) != 0) {
1067                 int i = 0;
1068                 /*
1069                  * Get rid of leading spaces.
1070                  */
1071                 while (start[i] == ' ')
1072                         i++;
1073 
1074                 if ((x - start) <= out_len) {
1075                         strcpy(out_buf, (start + i));
1076                         *offset += (x - start) + 1;
1077                         return 1;
1078                 }
1079         }
1080         return 0;
1081 }
1082 
1083 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1084 {
1085         int ret;
1086 
1087         ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1088 
1089         if (ret < 0)
1090                 return HV_E_FAIL;
1091 
1092         return 0;
1093 }
1094 
1095 
1096 static int process_ip_string(FILE *f, char *ip_string, int type)
1097 {
1098         int error = 0;
1099         char addr[INET6_ADDRSTRLEN];
1100         int i = 0;
1101         int j = 0;
1102         char str[256];
1103         char sub_str[13];
1104         int offset = 0;
1105 
1106         memset(addr, 0, sizeof(addr));
1107 
1108         while (parse_ip_val_buffer(ip_string, &offset, addr,
1109                                         (MAX_IP_ADDR_SIZE * 2))) {
1110 
1111                 sub_str[0] = 0;
1112                 if (is_ipv4(addr)) {
1113                         switch (type) {
1114                         case IPADDR:
1115                                 snprintf(str, sizeof(str), "%s", "IPADDR");
1116                                 break;
1117                         case NETMASK:
1118                                 snprintf(str, sizeof(str), "%s", "NETMASK");
1119                                 break;
1120                         case GATEWAY:
1121                                 snprintf(str, sizeof(str), "%s", "GATEWAY");
1122                                 break;
1123                         case DNS:
1124                                 snprintf(str, sizeof(str), "%s", "DNS");
1125                                 break;
1126                         }
1127 
1128                         if (type == DNS) {
1129                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1130                         } else if (type == GATEWAY && i == 0) {
1131                                 ++i;
1132                         } else {
1133                                 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1134                         }
1135 
1136 
1137                 } else if (expand_ipv6(addr, type)) {
1138                         switch (type) {
1139                         case IPADDR:
1140                                 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1141                                 break;
1142                         case NETMASK:
1143                                 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1144                                 break;
1145                         case GATEWAY:
1146                                 snprintf(str, sizeof(str), "%s",
1147                                         "IPV6_DEFAULTGW");
1148                                 break;
1149                         case DNS:
1150                                 snprintf(str, sizeof(str), "%s",  "DNS");
1151                                 break;
1152                         }
1153 
1154                         if (type == DNS) {
1155                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1156                         } else if (j == 0) {
1157                                 ++j;
1158                         } else {
1159                                 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1160                         }
1161                 } else {
1162                         return  HV_INVALIDARG;
1163                 }
1164 
1165                 error = kvp_write_file(f, str, sub_str, addr);
1166                 if (error)
1167                         return error;
1168                 memset(addr, 0, sizeof(addr));
1169         }
1170 
1171         return 0;
1172 }
1173 
1174 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1175 {
1176         int error = 0;
1177         char if_file[PATH_MAX];
1178         FILE *file;
1179         char cmd[PATH_MAX];
1180         char *mac_addr;
1181         int str_len;
1182 
1183         /*
1184          * Set the configuration for the specified interface with
1185          * the information provided. Since there is no standard
1186          * way to configure an interface, we will have an external
1187          * script that does the job of configuring the interface and
1188          * flushing the configuration.
1189          *
1190          * The parameters passed to this external script are:
1191          * 1. A configuration file that has the specified configuration.
1192          *
1193          * We will embed the name of the interface in the configuration
1194          * file: ifcfg-ethx (where ethx is the interface name).
1195          *
1196          * The information provided here may be more than what is needed
1197          * in a given distro to configure the interface and so are free
1198          * ignore information that may not be relevant.
1199          *
1200          * Here is the format of the ip configuration file:
1201          *
1202          * HWADDR=macaddr
1203          * DEVICE=interface name
1204          * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1205          *                       or "none" if no boot-time protocol should be used)
1206          *
1207          * IPADDR0=ipaddr1
1208          * IPADDR1=ipaddr2
1209          * IPADDRx=ipaddry (where y = x + 1)
1210          *
1211          * NETMASK0=netmask1
1212          * NETMASKx=netmasky (where y = x + 1)
1213          *
1214          * GATEWAY=ipaddr1
1215          * GATEWAYx=ipaddry (where y = x + 1)
1216          *
1217          * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1218          *
1219          * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1220          * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1221          * IPV6NETMASK.
1222          *
1223          * The host can specify multiple ipv4 and ipv6 addresses to be
1224          * configured for the interface. Furthermore, the configuration
1225          * needs to be persistent. A subsequent GET call on the interface
1226          * is expected to return the configuration that is set via the SET
1227          * call.
1228          */
1229 
1230         snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1231                 "/ifcfg-", if_name);
1232 
1233         file = fopen(if_file, "w");
1234 
1235         if (file == NULL) {
1236                 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1237                                 errno, strerror(errno));
1238                 return HV_E_FAIL;
1239         }
1240 
1241         /*
1242          * First write out the MAC address.
1243          */
1244 
1245         mac_addr = kvp_if_name_to_mac(if_name);
1246         if (mac_addr == NULL) {
1247                 error = HV_E_FAIL;
1248                 goto setval_error;
1249         }
1250 
1251         error = kvp_write_file(file, "HWADDR", "", mac_addr);
1252         free(mac_addr);
1253         if (error)
1254                 goto setval_error;
1255 
1256         error = kvp_write_file(file, "DEVICE", "", if_name);
1257         if (error)
1258                 goto setval_error;
1259 
1260         /*
1261          * The dhcp_enabled flag is only for IPv4. In the case the host only
1262          * injects an IPv6 address, the flag is true, but we still need to
1263          * proceed to parse and pass the IPv6 information to the
1264          * disto-specific script hv_set_ifconfig.
1265          */
1266         if (new_val->dhcp_enabled) {
1267                 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1268                 if (error)
1269                         goto setval_error;
1270 
1271         } else {
1272                 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1273                 if (error)
1274                         goto setval_error;
1275         }
1276 
1277         /*
1278          * Write the configuration for ipaddress, netmask, gateway and
1279          * name servers.
1280          */
1281 
1282         error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1283         if (error)
1284                 goto setval_error;
1285 
1286         error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1287         if (error)
1288                 goto setval_error;
1289 
1290         error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1291         if (error)
1292                 goto setval_error;
1293 
1294         error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1295         if (error)
1296                 goto setval_error;
1297 
1298         fclose(file);
1299 
1300         /*
1301          * Now that we have populated the configuration file,
1302          * invoke the external script to do its magic.
1303          */
1304 
1305         str_len = snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s",
1306                            "hv_set_ifconfig", if_file);
1307         /*
1308          * This is a little overcautious, but it's necessary to suppress some
1309          * false warnings from gcc 8.0.1.
1310          */
1311         if (str_len <= 0 || (unsigned int)str_len >= sizeof(cmd)) {
1312                 syslog(LOG_ERR, "Cmd '%s' (len=%d) may be too long",
1313                        cmd, str_len);
1314                 return HV_E_FAIL;
1315         }
1316 
1317         if (system(cmd)) {
1318                 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1319                                 cmd, errno, strerror(errno));
1320                 return HV_E_FAIL;
1321         }
1322         return 0;
1323 
1324 setval_error:
1325         syslog(LOG_ERR, "Failed to write config file");
1326         fclose(file);
1327         return error;
1328 }
1329 
1330 
1331 static void
1332 kvp_get_domain_name(char *buffer, int length)
1333 {
1334         struct addrinfo hints, *info ;
1335         int error = 0;
1336 
1337         gethostname(buffer, length);
1338         memset(&hints, 0, sizeof(hints));
1339         hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1340         hints.ai_socktype = SOCK_STREAM;
1341         hints.ai_flags = AI_CANONNAME;
1342 
1343         error = getaddrinfo(buffer, NULL, &hints, &info);
1344         if (error != 0) {
1345                 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1346                         error, gai_strerror(error));
1347                 return;
1348         }
1349         snprintf(buffer, length, "%s", info->ai_canonname);
1350         freeaddrinfo(info);
1351 }
1352 
1353 void print_usage(char *argv[])
1354 {
1355         fprintf(stderr, "Usage: %s [options]\n"
1356                 "Options are:\n"
1357                 "  -n, --no-daemon        stay in foreground, don't daemonize\n"
1358                 "  -h, --help             print this help\n", argv[0]);
1359 }
1360 
1361 int main(int argc, char *argv[])
1362 {
1363         int kvp_fd, len;
1364         int error;
1365         struct pollfd pfd;
1366         char    *p;
1367         struct hv_kvp_msg hv_msg[1];
1368         char    *key_value;
1369         char    *key_name;
1370         int     op;
1371         int     pool;
1372         char    *if_name;
1373         struct hv_kvp_ipaddr_value *kvp_ip_val;
1374         int daemonize = 1, long_index = 0, opt;
1375 
1376         static struct option long_options[] = {
1377                 {"help",        no_argument,       0,  'h' },
1378                 {"no-daemon",   no_argument,       0,  'n' },
1379                 {0,             0,                 0,  0   }
1380         };
1381 
1382         while ((opt = getopt_long(argc, argv, "hn", long_options,
1383                                   &long_index)) != -1) {
1384                 switch (opt) {
1385                 case 'n':
1386                         daemonize = 0;
1387                         break;
1388                 case 'h':
1389                 default:
1390                         print_usage(argv);
1391                         exit(EXIT_FAILURE);
1392                 }
1393         }
1394 
1395         if (daemonize && daemon(1, 0))
1396                 return 1;
1397 
1398         openlog("KVP", 0, LOG_USER);
1399         syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1400 
1401         kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC);
1402 
1403         if (kvp_fd < 0) {
1404                 syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s",
1405                         errno, strerror(errno));
1406                 exit(EXIT_FAILURE);
1407         }
1408 
1409         /*
1410          * Retrieve OS release information.
1411          */
1412         kvp_get_os_info();
1413         /*
1414          * Cache Fully Qualified Domain Name because getaddrinfo takes an
1415          * unpredictable amount of time to finish.
1416          */
1417         kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
1418 
1419         if (kvp_file_init()) {
1420                 syslog(LOG_ERR, "Failed to initialize the pools");
1421                 exit(EXIT_FAILURE);
1422         }
1423 
1424         /*
1425          * Register ourselves with the kernel.
1426          */
1427         hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1428         len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1429         if (len != sizeof(struct hv_kvp_msg)) {
1430                 syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
1431                        errno, strerror(errno));
1432                 close(kvp_fd);
1433                 exit(EXIT_FAILURE);
1434         }
1435 
1436         pfd.fd = kvp_fd;
1437 
1438         while (1) {
1439                 pfd.events = POLLIN;
1440                 pfd.revents = 0;
1441 
1442                 if (poll(&pfd, 1, -1) < 0) {
1443                         syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1444                         if (errno == EINVAL) {
1445                                 close(kvp_fd);
1446                                 exit(EXIT_FAILURE);
1447                         }
1448                         else
1449                                 continue;
1450                 }
1451 
1452                 len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1453 
1454                 if (len != sizeof(struct hv_kvp_msg)) {
1455                         syslog(LOG_ERR, "read failed; error:%d %s",
1456                                errno, strerror(errno));
1457 
1458                         close(kvp_fd);
1459                         return EXIT_FAILURE;
1460                 }
1461 
1462                 /*
1463                  * We will use the KVP header information to pass back
1464                  * the error from this daemon. So, first copy the state
1465                  * and set the error code to success.
1466                  */
1467                 op = hv_msg->kvp_hdr.operation;
1468                 pool = hv_msg->kvp_hdr.pool;
1469                 hv_msg->error = HV_S_OK;
1470 
1471                 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1472                         /*
1473                          * Driver is registering with us; stash away the version
1474                          * information.
1475                          */
1476                         in_hand_shake = 0;
1477                         p = (char *)hv_msg->body.kvp_register.version;
1478                         lic_version = malloc(strlen(p) + 1);
1479                         if (lic_version) {
1480                                 strcpy(lic_version, p);
1481                                 syslog(LOG_INFO, "KVP LIC Version: %s",
1482                                        lic_version);
1483                         } else {
1484                                 syslog(LOG_ERR, "malloc failed");
1485                         }
1486                         continue;
1487                 }
1488 
1489                 switch (op) {
1490                 case KVP_OP_GET_IP_INFO:
1491                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1492 
1493                         error =  kvp_mac_to_ip(kvp_ip_val);
1494 
1495                         if (error)
1496                                 hv_msg->error = error;
1497 
1498                         break;
1499 
1500                 case KVP_OP_SET_IP_INFO:
1501                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
1502                         if_name = kvp_get_if_name(
1503                                         (char *)kvp_ip_val->adapter_id);
1504                         if (if_name == NULL) {
1505                                 /*
1506                                  * We could not map the guid to an
1507                                  * interface name; return error.
1508                                  */
1509                                 hv_msg->error = HV_GUID_NOTFOUND;
1510                                 break;
1511                         }
1512                         error = kvp_set_ip_info(if_name, kvp_ip_val);
1513                         if (error)
1514                                 hv_msg->error = error;
1515 
1516                         free(if_name);
1517                         break;
1518 
1519                 case KVP_OP_SET:
1520                         if (kvp_key_add_or_modify(pool,
1521                                         hv_msg->body.kvp_set.data.key,
1522                                         hv_msg->body.kvp_set.data.key_size,
1523                                         hv_msg->body.kvp_set.data.value,
1524                                         hv_msg->body.kvp_set.data.value_size))
1525                                         hv_msg->error = HV_S_CONT;
1526                         break;
1527 
1528                 case KVP_OP_GET:
1529                         if (kvp_get_value(pool,
1530                                         hv_msg->body.kvp_set.data.key,
1531                                         hv_msg->body.kvp_set.data.key_size,
1532                                         hv_msg->body.kvp_set.data.value,
1533                                         hv_msg->body.kvp_set.data.value_size))
1534                                         hv_msg->error = HV_S_CONT;
1535                         break;
1536 
1537                 case KVP_OP_DELETE:
1538                         if (kvp_key_delete(pool,
1539                                         hv_msg->body.kvp_delete.key,
1540                                         hv_msg->body.kvp_delete.key_size))
1541                                         hv_msg->error = HV_S_CONT;
1542                         break;
1543 
1544                 default:
1545                         break;
1546                 }
1547 
1548                 if (op != KVP_OP_ENUMERATE)
1549                         goto kvp_done;
1550 
1551                 /*
1552                  * If the pool is KVP_POOL_AUTO, dynamically generate
1553                  * both the key and the value; if not read from the
1554                  * appropriate pool.
1555                  */
1556                 if (pool != KVP_POOL_AUTO) {
1557                         if (kvp_pool_enumerate(pool,
1558                                         hv_msg->body.kvp_enum_data.index,
1559                                         hv_msg->body.kvp_enum_data.data.key,
1560                                         HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1561                                         hv_msg->body.kvp_enum_data.data.value,
1562                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1563                                         hv_msg->error = HV_S_CONT;
1564                         goto kvp_done;
1565                 }
1566 
1567                 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1568                 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1569 
1570                 switch (hv_msg->body.kvp_enum_data.index) {
1571                 case FullyQualifiedDomainName:
1572                         strcpy(key_value, full_domain_name);
1573                         strcpy(key_name, "FullyQualifiedDomainName");
1574                         break;
1575                 case IntegrationServicesVersion:
1576                         strcpy(key_name, "IntegrationServicesVersion");
1577                         strcpy(key_value, lic_version);
1578                         break;
1579                 case NetworkAddressIPv4:
1580                         kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1581                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1582                         strcpy(key_name, "NetworkAddressIPv4");
1583                         break;
1584                 case NetworkAddressIPv6:
1585                         kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1586                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1587                         strcpy(key_name, "NetworkAddressIPv6");
1588                         break;
1589                 case OSBuildNumber:
1590                         strcpy(key_value, os_build);
1591                         strcpy(key_name, "OSBuildNumber");
1592                         break;
1593                 case OSName:
1594                         strcpy(key_value, os_name);
1595                         strcpy(key_name, "OSName");
1596                         break;
1597                 case OSMajorVersion:
1598                         strcpy(key_value, os_major);
1599                         strcpy(key_name, "OSMajorVersion");
1600                         break;
1601                 case OSMinorVersion:
1602                         strcpy(key_value, os_minor);
1603                         strcpy(key_name, "OSMinorVersion");
1604                         break;
1605                 case OSVersion:
1606                         strcpy(key_value, os_version);
1607                         strcpy(key_name, "OSVersion");
1608                         break;
1609                 case ProcessorArchitecture:
1610                         strcpy(key_value, processor_arch);
1611                         strcpy(key_name, "ProcessorArchitecture");
1612                         break;
1613                 default:
1614                         hv_msg->error = HV_S_CONT;
1615                         break;
1616                 }
1617 
1618                 /* Send the value back to the kernel. */
1619 kvp_done:
1620                 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1621                 if (len != sizeof(struct hv_kvp_msg)) {
1622                         syslog(LOG_ERR, "write failed; error: %d %s", errno,
1623                                strerror(errno));
1624                         exit(EXIT_FAILURE);
1625                 }
1626         }
1627 
1628         close(kvp_fd);
1629         exit(0);
1630 }
1631 

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