blob: 60a94b3e532e4d5ec07cd96c179911c378b9ca51 [file] [log] [blame]
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001/*
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>
Ky Srinivasancc04acf2010-12-16 18:56:54 -070029#include <stdio.h>
30#include <stdlib.h>
31#include <unistd.h>
32#include <string.h>
K. Y. Srinivasan32061b42012-09-05 13:50:13 -070033#include <ctype.h>
Ky Srinivasancc04acf2010-12-16 18:56:54 -070034#include <errno.h>
35#include <arpa/inet.h>
K. Y. Srinivasaneab6af72012-02-02 16:56:49 -080036#include <linux/hyperv.h>
Ky Srinivasancc04acf2010-12-16 18:56:54 -070037#include <linux/netlink.h>
Ky Srinivasancc04acf2010-12-16 18:56:54 -070038#include <ifaddrs.h>
39#include <netdb.h>
40#include <syslog.h>
K. Y. Srinivasandb425332012-03-16 08:02:26 -070041#include <sys/stat.h>
42#include <fcntl.h>
K. Y. Srinivasan32061b42012-09-05 13:50:13 -070043#include <dirent.h>
K. Y. Srinivasan3321e732012-10-25 14:15:50 -070044#include <net/if.h>
Vitaly Kuznetsov170f4be2014-10-22 18:07:11 +020045#include <getopt.h>
Ky Srinivasancc04acf2010-12-16 18:56:54 -070046
47/*
48 * KVP protocol: The user mode component first registers with the
49 * the kernel component. Subsequently, the kernel component requests, data
50 * for the specified keys. In response to this message the user mode component
51 * fills in the value corresponding to the specified key. We overload the
52 * sequence field in the cn_msg header to define our KVP message types.
53 *
54 * We use this infrastructure for also supporting queries from user mode
55 * application for state that may be maintained in the KVP kernel component.
56 *
Ky Srinivasancc04acf2010-12-16 18:56:54 -070057 */
58
Ky Srinivasancc04acf2010-12-16 18:56:54 -070059
60enum key_index {
61 FullyQualifiedDomainName = 0,
62 IntegrationServicesVersion, /*This key is serviced in the kernel*/
63 NetworkAddressIPv4,
64 NetworkAddressIPv6,
65 OSBuildNumber,
66 OSName,
67 OSMajorVersion,
68 OSMinorVersion,
69 OSVersion,
70 ProcessorArchitecture
71};
72
K. Y. Srinivasan32061b42012-09-05 13:50:13 -070073
74enum {
75 IPADDR = 0,
76 NETMASK,
77 GATEWAY,
78 DNS
79};
80
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -070081static int in_hand_shake = 1;
Ky Srinivasancc04acf2010-12-16 18:56:54 -070082
Olaf Hering7989f7d2011-03-22 10:02:17 +010083static char *os_name = "";
84static char *os_major = "";
85static char *os_minor = "";
86static char *processor_arch;
87static char *os_build;
K. Y. Srinivasanf426a362012-10-25 14:15:49 -070088static char *os_version;
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -070089static char *lic_version = "Unknown version";
Olaf Hering581252102013-08-07 19:14:37 +020090static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
Olaf Hering7989f7d2011-03-22 10:02:17 +010091static struct utsname uts_buf;
Ky Srinivasancc04acf2010-12-16 18:56:54 -070092
K. Y. Srinivasan32061b42012-09-05 13:50:13 -070093/*
94 * The location of the interface configuration file.
95 */
96
Tomas Hozza40424f52012-11-27 08:56:33 +010097#define KVP_CONFIG_LOC "/var/lib/hyperv"
K. Y. Srinivasandb425332012-03-16 08:02:26 -070098
99#define MAX_FILE_NAME 100
100#define ENTRIES_PER_BLOCK 50
101
Tomas Hozzaf4685fa2013-03-13 14:14:13 +0100102#ifndef SOL_NETLINK
103#define SOL_NETLINK 270
104#endif
105
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700106struct kvp_record {
K. Y. Srinivasand0cbc152012-09-04 14:46:34 -0700107 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
108 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700109};
110
111struct kvp_file_state {
112 int fd;
113 int num_blocks;
114 struct kvp_record *records;
115 int num_records;
K. Y. Srinivasand0cbc152012-09-04 14:46:34 -0700116 char fname[MAX_FILE_NAME];
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700117};
118
119static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
120
121static 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) {
Tomas Hozza12e50c32013-06-17 10:39:44 +0200127 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
128 errno, strerror(errno));
Ben Hutchings6bb22fe2012-09-05 14:37:36 -0700129 exit(EXIT_FAILURE);
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700130 }
131}
132
133static 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) {
Tomas Hozza12e50c32013-06-17 10:39:44 +0200139 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
140 errno, strerror(errno));
Ben Hutchings6bb22fe2012-09-05 14:37:36 -0700141 exit(EXIT_FAILURE);
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700142 }
143}
144
145static void kvp_update_file(int pool)
146{
147 FILE *filep;
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700148
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
Tomas Hozza8467fdb2013-01-18 15:23:41 +0100155 filep = fopen(kvp_file_info[pool].fname, "we");
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700156 if (!filep) {
Tomas Hozza12e50c32013-06-17 10:39:44 +0200157 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
158 errno, strerror(errno));
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700159 kvp_release_lock(pool);
Ben Hutchings6bb22fe2012-09-05 14:37:36 -0700160 exit(EXIT_FAILURE);
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700161 }
162
Vitaly Kuznetsov77ce2472015-01-09 22:18:52 -0800163 fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record),
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700164 kvp_file_info[pool].num_records, filep);
165
Ben Hutchings436473b2012-09-05 14:37:37 -0700166 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
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700172 kvp_release_lock(pool);
173}
174
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700175static 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
Tomas Hozza8467fdb2013-01-18 15:23:41 +0100186 filep = fopen(kvp_file_info[pool].fname, "re");
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700187 if (!filep) {
Tomas Hozza12e50c32013-06-17 10:39:44 +0200188 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
189 errno, strerror(errno));
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700190 kvp_release_lock(pool);
Ben Hutchings6bb22fe2012-09-05 14:37:36 -0700191 exit(EXIT_FAILURE);
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700192 }
Ben Hutchings436473b2012-09-05 14:37:37 -0700193 for (;;) {
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700194 readp = &record[records_read];
195 records_read += fread(readp, sizeof(struct kvp_record),
Paul Meyer3aa6d7f2017-11-14 13:06:47 -0700196 ENTRIES_PER_BLOCK * num_blocks - records_read,
197 filep);
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700198
Ben Hutchings436473b2012-09-05 14:37:37 -0700199 if (ferror(filep)) {
Paul Meyer3aa6d7f2017-11-14 13:06:47 -0700200 syslog(LOG_ERR,
201 "Failed to read file, pool: %d; error: %d %s",
202 pool, errno, strerror(errno));
203 kvp_release_lock(pool);
Ben Hutchings436473b2012-09-05 14:37:37 -0700204 exit(EXIT_FAILURE);
205 }
206
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700207 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");
Paul Meyer3aa6d7f2017-11-14 13:06:47 -0700216 kvp_release_lock(pool);
Ben Hutchings6bb22fe2012-09-05 14:37:36 -0700217 exit(EXIT_FAILURE);
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700218 }
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
Ben Hutchingsd5ab4822012-09-05 14:37:35 -0700228 fclose(filep);
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700229 kvp_release_lock(pool);
230}
Paul Meyer3aa6d7f2017-11-14 13:06:47 -0700231
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700232static int kvp_file_init(void)
233{
K. Y. Srinivasan00b83352012-09-04 14:46:33 -0700234 int fd;
K. Y. Srinivasand0cbc152012-09-04 14:46:34 -0700235 char *fname;
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700236 int i;
237 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
238
Tomas Hozza40424f52012-11-27 08:56:33 +0100239 if (access(KVP_CONFIG_LOC, F_OK)) {
Ben Hutchings0bffd252012-11-27 08:56:34 +0100240 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
Tomas Hozza12e50c32013-06-17 10:39:44 +0200241 syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
242 errno, strerror(errno));
Ben Hutchings6bb22fe2012-09-05 14:37:36 -0700243 exit(EXIT_FAILURE);
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700244 }
245 }
246
247 for (i = 0; i < KVP_POOL_COUNT; i++) {
248 fname = kvp_file_info[i].fname;
Tomas Hozza40424f52012-11-27 08:56:33 +0100249 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
Tomas Hozza8467fdb2013-01-18 15:23:41 +0100250 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700251
252 if (fd == -1)
253 return 1;
254
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700255 kvp_file_info[i].fd = fd;
Paul Meyer3aa6d7f2017-11-14 13:06:47 -0700256 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);
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700262 }
263
264 return 0;
265}
266
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800267static int kvp_key_delete(int pool, const __u8 *key, int key_size)
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700268{
269 int i;
270 int j, k;
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700271 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;
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700281
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) {
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
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800310static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size,
311 const __u8 *value, int value_size)
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700312{
313 int i;
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700314 int num_records;
315 struct kvp_record *record;
316 int num_blocks;
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700317
318 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
319 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
320 return 1;
321
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700322 /*
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
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700331 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
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800364static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value,
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700365 int value_size)
366{
367 int i;
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700368 int num_records;
369 struct kvp_record *record;
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700370
371 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
372 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
373 return 1;
374
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700375 /*
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
K. Y. Srinivasandb425332012-03-16 08:02:26 -0700383 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
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800396static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
397 __u8 *value, int value_size)
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700398{
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) {
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -0700408 return 1;
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700409 }
410
411 memcpy(key, record[index].key, key_size);
412 memcpy(value, record[index].value, value_size);
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -0700413 return 0;
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -0700414}
415
416
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700417void kvp_get_os_info(void)
418{
419 FILE *file;
Olaf Hering7989f7d2011-03-22 10:02:17 +0100420 char *p, buf[512];
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700421
Olaf Hering7989f7d2011-03-22 10:02:17 +0100422 uname(&uts_buf);
K. Y. Srinivasanf426a362012-10-25 14:15:49 -0700423 os_version = uts_buf.release;
424 os_build = strdup(uts_buf.release);
425
Ben Hutchings44c8b252012-09-06 13:32:14 -0700426 os_name = uts_buf.sysname;
K. Y. Srinivasan064931d2011-07-19 11:44:20 -0700427 processor_arch = uts_buf.machine;
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700428
K. Y. Srinivasane54bbc62011-07-22 10:14:31 -0700429 /*
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 */
K. Y. Srinivasanf426a362012-10-25 14:15:49 -0700434 p = strchr(os_version, '-');
K. Y. Srinivasane54bbc62011-07-22 10:14:31 -0700435 if (p)
436 *p = '\0';
437
Ben Hutchings44c8b252012-09-06 13:32:14 -0700438 /*
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 */
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700492 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;
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700498
499 /*
500 * We don't have information about the os.
501 */
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700502 return;
503
504kvp_osinfo_found:
Olaf Hering7989f7d2011-03-22 10:02:17 +0100505 /* 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
540done:
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700541 fclose(file);
542 return;
543}
544
K. Y. Srinivasan32061b42012-09-05 13:50:13 -0700545
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
555static char *kvp_get_if_name(char *guid)
556{
557 DIR *dir;
558 struct dirent *entry;
559 FILE *file;
560 char *p, *q, *x;
561 char *if_name = NULL;
562 char buf[256];
563 char *kvp_net_dir = "/sys/class/net/";
564 char dev_id[256];
565
566 dir = opendir(kvp_net_dir);
567 if (dir == NULL)
568 return NULL;
569
570 snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
571 q = dev_id + strlen(kvp_net_dir);
572
573 while ((entry = readdir(dir)) != NULL) {
574 /*
575 * Set the state for the next pass.
576 */
577 *q = '\0';
578 strcat(dev_id, entry->d_name);
579 strcat(dev_id, "/device/device_id");
580
581 file = fopen(dev_id, "r");
582 if (file == NULL)
583 continue;
584
585 p = fgets(buf, sizeof(buf), file);
586 if (p) {
587 x = strchr(p, '\n');
588 if (x)
589 *x = '\0';
590
591 if (!strcmp(p, guid)) {
592 /*
593 * Found the guid match; return the interface
594 * name. The caller will free the memory.
595 */
596 if_name = strdup(entry->d_name);
597 fclose(file);
598 break;
599 }
600 }
601 fclose(file);
602 }
603
604 closedir(dir);
605 return if_name;
606}
607
608/*
609 * Retrieve the MAC address given the interface name.
610 */
611
612static char *kvp_if_name_to_mac(char *if_name)
613{
614 FILE *file;
615 char *p, *x;
616 char buf[256];
617 char addr_file[256];
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800618 unsigned int i;
K. Y. Srinivasan32061b42012-09-05 13:50:13 -0700619 char *mac_addr = NULL;
620
621 snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
622 if_name, "/address");
623
624 file = fopen(addr_file, "r");
625 if (file == NULL)
626 return NULL;
627
628 p = fgets(buf, sizeof(buf), file);
629 if (p) {
630 x = strchr(p, '\n');
631 if (x)
632 *x = '\0';
633 for (i = 0; i < strlen(p); i++)
634 p[i] = toupper(p[i]);
635 mac_addr = strdup(p);
636 }
637
638 fclose(file);
639 return mac_addr;
640}
641
642
K. Y. Srinivasan16e87102012-09-05 13:50:15 -0700643/*
644 * Retrieve the interface name given tha MAC address.
645 */
646
647static char *kvp_mac_to_if_name(char *mac)
648{
649 DIR *dir;
650 struct dirent *entry;
651 FILE *file;
652 char *p, *q, *x;
653 char *if_name = NULL;
654 char buf[256];
655 char *kvp_net_dir = "/sys/class/net/";
656 char dev_id[256];
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800657 unsigned int i;
K. Y. Srinivasan16e87102012-09-05 13:50:15 -0700658
659 dir = opendir(kvp_net_dir);
660 if (dir == NULL)
661 return NULL;
662
663 snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
664 q = dev_id + strlen(kvp_net_dir);
665
666 while ((entry = readdir(dir)) != NULL) {
667 /*
668 * Set the state for the next pass.
669 */
670 *q = '\0';
671
672 strcat(dev_id, entry->d_name);
673 strcat(dev_id, "/address");
674
675 file = fopen(dev_id, "r");
676 if (file == NULL)
677 continue;
678
679 p = fgets(buf, sizeof(buf), file);
680 if (p) {
681 x = strchr(p, '\n');
682 if (x)
683 *x = '\0';
684
685 for (i = 0; i < strlen(p); i++)
686 p[i] = toupper(p[i]);
687
688 if (!strcmp(p, mac)) {
689 /*
690 * Found the MAC match; return the interface
691 * name. The caller will free the memory.
692 */
693 if_name = strdup(entry->d_name);
694 fclose(file);
695 break;
696 }
697 }
698 fclose(file);
699 }
700
701 closedir(dir);
702 return if_name;
703}
704
705
K. Y. Srinivasan4a52c4a2012-08-16 18:32:18 -0700706static void kvp_process_ipconfig_file(char *cmd,
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800707 char *config_buf, unsigned int len,
K. Y. Srinivasan4a52c4a2012-08-16 18:32:18 -0700708 int element_size, int offset)
709{
710 char buf[256];
711 char *p;
712 char *x;
713 FILE *file;
714
715 /*
716 * First execute the command.
717 */
718 file = popen(cmd, "r");
719 if (file == NULL)
720 return;
721
722 if (offset == 0)
723 memset(config_buf, 0, len);
724 while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800725 if (len < strlen(config_buf) + element_size + 1)
K. Y. Srinivasan4a52c4a2012-08-16 18:32:18 -0700726 break;
727
728 x = strchr(p, '\n');
Tomas Hozzaf14e6002013-05-22 14:54:32 +0200729 if (x)
730 *x = '\0';
731
K. Y. Srinivasan4a52c4a2012-08-16 18:32:18 -0700732 strcat(config_buf, p);
733 strcat(config_buf, ";");
734 }
735 pclose(file);
736}
737
738static void kvp_get_ipconfig_info(char *if_name,
739 struct hv_kvp_ipaddr_value *buffer)
740{
741 char cmd[512];
K. Y. Srinivasanc0503722012-09-05 13:50:11 -0700742 char dhcp_info[128];
743 char *p;
744 FILE *file;
K. Y. Srinivasan4a52c4a2012-08-16 18:32:18 -0700745
746 /*
747 * Get the address of default gateway (ipv4).
748 */
749 sprintf(cmd, "%s %s", "ip route show dev", if_name);
750 strcat(cmd, " | awk '/default/ {print $3 }'");
751
752 /*
753 * Execute the command to gather gateway info.
754 */
755 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
756 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
757
758 /*
759 * Get the address of default gateway (ipv6).
760 */
761 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
762 strcat(cmd, " | awk '/default/ {print $3 }'");
763
764 /*
765 * Execute the command to gather gateway info (ipv6).
766 */
767 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
768 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
769
K. Y. Srinivasan96929882012-09-04 14:46:36 -0700770
771 /*
772 * Gather the DNS state.
773 * Since there is no standard way to get this information
774 * across various distributions of interest; we just invoke
775 * an external script that needs to be ported across distros
776 * of interest.
777 *
778 * Following is the expected format of the information from the script:
779 *
780 * ipaddr1 (nameserver1)
781 * ipaddr2 (nameserver2)
782 * .
783 * .
784 */
785
786 sprintf(cmd, "%s", "hv_get_dns_info");
787
788 /*
789 * Execute the command to gather DNS info.
790 */
791 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
792 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
K. Y. Srinivasanc0503722012-09-05 13:50:11 -0700793
794 /*
795 * Gather the DHCP state.
796 * We will gather this state by invoking an external script.
797 * The parameter to the script is the interface name.
798 * Here is the expected output:
799 *
800 * Enabled: DHCP enabled.
801 */
802
803 sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
804
805 file = popen(cmd, "r");
806 if (file == NULL)
807 return;
808
809 p = fgets(dhcp_info, sizeof(dhcp_info), file);
810 if (p == NULL) {
811 pclose(file);
812 return;
813 }
814
815 if (!strncmp(p, "Enabled", 7))
816 buffer->dhcp_enabled = 1;
817 else
818 buffer->dhcp_enabled = 0;
819
820 pclose(file);
K. Y. Srinivasan4a52c4a2012-08-16 18:32:18 -0700821}
822
823
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700824static unsigned int hweight32(unsigned int *w)
825{
826 unsigned int res = *w - ((*w >> 1) & 0x55555555);
827 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
828 res = (res + (res >> 4)) & 0x0F0F0F0F;
829 res = res + (res >> 8);
830 return (res + (res >> 16)) & 0x000000FF;
831}
832
K. Y. Srinivasanaf733012012-08-16 18:32:14 -0700833static int kvp_process_ip_address(void *addrp,
834 int family, char *buffer,
835 int length, int *offset)
836{
837 struct sockaddr_in *addr;
838 struct sockaddr_in6 *addr6;
839 int addr_length;
840 char tmp[50];
841 const char *str;
842
843 if (family == AF_INET) {
844 addr = (struct sockaddr_in *)addrp;
845 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
846 addr_length = INET_ADDRSTRLEN;
847 } else {
848 addr6 = (struct sockaddr_in6 *)addrp;
849 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
850 addr_length = INET6_ADDRSTRLEN;
851 }
852
K. Y. Srinivasan3321e732012-10-25 14:15:50 -0700853 if ((length - *offset) < addr_length + 2)
K. Y. Srinivasan16e87102012-09-05 13:50:15 -0700854 return HV_E_FAIL;
K. Y. Srinivasanaf733012012-08-16 18:32:14 -0700855 if (str == NULL) {
856 strcpy(buffer, "inet_ntop failed\n");
K. Y. Srinivasan16e87102012-09-05 13:50:15 -0700857 return HV_E_FAIL;
K. Y. Srinivasanaf733012012-08-16 18:32:14 -0700858 }
859 if (*offset == 0)
860 strcpy(buffer, tmp);
K. Y. Srinivasan3321e732012-10-25 14:15:50 -0700861 else {
862 strcat(buffer, ";");
K. Y. Srinivasanaf733012012-08-16 18:32:14 -0700863 strcat(buffer, tmp);
K. Y. Srinivasan3321e732012-10-25 14:15:50 -0700864 }
K. Y. Srinivasanaf733012012-08-16 18:32:14 -0700865
866 *offset += strlen(str) + 1;
K. Y. Srinivasan3321e732012-10-25 14:15:50 -0700867
K. Y. Srinivasanaf733012012-08-16 18:32:14 -0700868 return 0;
869}
870
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700871static int
K. Y. Srinivasan4a3b97e52012-09-05 13:50:14 -0700872kvp_get_ip_info(int family, char *if_name, int op,
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800873 void *out_buffer, unsigned int length)
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700874{
875 struct ifaddrs *ifap;
876 struct ifaddrs *curp;
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700877 int offset = 0;
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700878 int sn_offset = 0;
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700879 int error = 0;
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -0700880 char *buffer;
881 struct hv_kvp_ipaddr_value *ip_buffer;
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700882 char cidr_mask[5]; /* /xyz */
883 int weight;
884 int i;
885 unsigned int *w;
886 char *sn_str;
887 struct sockaddr_in6 *addr6;
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700888
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -0700889 if (op == KVP_OP_ENUMERATE) {
890 buffer = out_buffer;
891 } else {
892 ip_buffer = out_buffer;
893 buffer = (char *)ip_buffer->ip_addr;
894 ip_buffer->addr_family = 0;
895 }
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700896 /*
897 * On entry into this function, the buffer is capable of holding the
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -0700898 * maximum key value.
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700899 */
900
901 if (getifaddrs(&ifap)) {
902 strcpy(buffer, "getifaddrs failed\n");
K. Y. Srinivasan16e87102012-09-05 13:50:15 -0700903 return HV_E_FAIL;
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700904 }
905
906 curp = ifap;
907 while (curp != NULL) {
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -0700908 if (curp->ifa_addr == NULL) {
909 curp = curp->ifa_next;
910 continue;
911 }
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700912
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -0700913 if ((if_name != NULL) &&
914 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
915 /*
916 * We want info about a specific interface;
917 * just continue.
918 */
919 curp = curp->ifa_next;
920 continue;
921 }
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700922
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -0700923 /*
924 * We only support two address families: AF_INET and AF_INET6.
925 * If a family value of 0 is specified, we collect both
926 * supported address families; if not we gather info on
927 * the specified address family.
928 */
K. Y. Srinivasan3321e732012-10-25 14:15:50 -0700929 if ((((family != 0) &&
930 (curp->ifa_addr->sa_family != family))) ||
931 (curp->ifa_flags & IFF_LOOPBACK)) {
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -0700932 curp = curp->ifa_next;
933 continue;
934 }
935 if ((curp->ifa_addr->sa_family != AF_INET) &&
936 (curp->ifa_addr->sa_family != AF_INET6)) {
937 curp = curp->ifa_next;
938 continue;
939 }
Ky Srinivasancc04acf2010-12-16 18:56:54 -0700940
K. Y. Srinivasan0d5b6b12012-08-16 18:32:15 -0700941 if (op == KVP_OP_GET_IP_INFO) {
942 /*
943 * Gather info other than the IP address.
944 * IP address info will be gathered later.
945 */
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700946 if (curp->ifa_addr->sa_family == AF_INET) {
K. Y. Srinivasan0d5b6b12012-08-16 18:32:15 -0700947 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700948 /*
949 * Get subnet info.
950 */
951 error = kvp_process_ip_address(
952 curp->ifa_netmask,
953 AF_INET,
954 (char *)
955 ip_buffer->sub_net,
956 length,
957 &sn_offset);
958 if (error)
959 goto gather_ipaddr;
960 } else {
K. Y. Srinivasan0d5b6b12012-08-16 18:32:15 -0700961 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700962
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700963 /*
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700964 * Get subnet info in CIDR format.
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700965 */
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700966 weight = 0;
967 sn_str = (char *)ip_buffer->sub_net;
968 addr6 = (struct sockaddr_in6 *)
969 curp->ifa_netmask;
970 w = addr6->sin6_addr.s6_addr32;
971
972 for (i = 0; i < 4; i++)
973 weight += hweight32(&w[i]);
974
975 sprintf(cidr_mask, "/%d", weight);
Vitaly Kuznetsov69258c02015-01-09 22:18:53 -0800976 if (length < sn_offset + strlen(cidr_mask) + 1)
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700977 goto gather_ipaddr;
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700978
979 if (sn_offset == 0)
980 strcpy(sn_str, cidr_mask);
K. Y. Srinivasaned4bb972013-07-11 12:03:31 -0700981 else {
982 strcat((char *)ip_buffer->sub_net, ";");
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700983 strcat(sn_str, cidr_mask);
K. Y. Srinivasaned4bb972013-07-11 12:03:31 -0700984 }
K. Y. Srinivasan6a60a6a2012-08-16 18:32:17 -0700985 sn_offset += strlen(sn_str) + 1;
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700986 }
K. Y. Srinivasan4a52c4a2012-08-16 18:32:18 -0700987
988 /*
989 * Collect other ip related configuration info.
990 */
991
992 kvp_get_ipconfig_info(if_name, ip_buffer);
K. Y. Srinivasan0d5b6b12012-08-16 18:32:15 -0700993 }
994
K. Y. Srinivasan04405782012-08-16 18:32:16 -0700995gather_ipaddr:
K. Y. Srinivasanaf733012012-08-16 18:32:14 -0700996 error = kvp_process_ip_address(curp->ifa_addr,
997 curp->ifa_addr->sa_family,
998 buffer,
999 length, &offset);
1000 if (error)
1001 goto getaddr_done;
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -07001002
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001003 curp = curp->ifa_next;
1004 }
1005
1006getaddr_done:
1007 freeifaddrs(ifap);
1008 return error;
1009}
1010
1011
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001012static int expand_ipv6(char *addr, int type)
1013{
1014 int ret;
1015 struct in6_addr v6_addr;
1016
1017 ret = inet_pton(AF_INET6, addr, &v6_addr);
1018
1019 if (ret != 1) {
1020 if (type == NETMASK)
1021 return 1;
1022 return 0;
1023 }
1024
1025 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1026 "%02x%02x:%02x%02x:%02x%02x",
1027 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1028 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1029 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1030 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1031 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1032 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1033 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1034 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1035
1036 return 1;
1037
1038}
1039
1040static int is_ipv4(char *addr)
1041{
1042 int ret;
1043 struct in_addr ipv4_addr;
1044
1045 ret = inet_pton(AF_INET, addr, &ipv4_addr);
1046
1047 if (ret == 1)
1048 return 1;
1049 return 0;
1050}
1051
1052static int parse_ip_val_buffer(char *in_buf, int *offset,
1053 char *out_buf, int out_len)
1054{
1055 char *x;
1056 char *start;
1057
1058 /*
1059 * in_buf has sequence of characters that are seperated by
1060 * the character ';'. The last sequence does not have the
1061 * terminating ";" character.
1062 */
1063 start = in_buf + *offset;
1064
1065 x = strchr(start, ';');
1066 if (x)
1067 *x = 0;
1068 else
1069 x = start + strlen(start);
1070
1071 if (strlen(start) != 0) {
1072 int i = 0;
1073 /*
1074 * Get rid of leading spaces.
1075 */
1076 while (start[i] == ' ')
1077 i++;
1078
1079 if ((x - start) <= out_len) {
1080 strcpy(out_buf, (start + i));
1081 *offset += (x - start) + 1;
1082 return 1;
1083 }
1084 }
1085 return 0;
1086}
1087
1088static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1089{
1090 int ret;
1091
1092 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1093
1094 if (ret < 0)
1095 return HV_E_FAIL;
1096
1097 return 0;
1098}
1099
1100
1101static int process_ip_string(FILE *f, char *ip_string, int type)
1102{
1103 int error = 0;
1104 char addr[INET6_ADDRSTRLEN];
1105 int i = 0;
1106 int j = 0;
1107 char str[256];
1108 char sub_str[10];
1109 int offset = 0;
1110
1111 memset(addr, 0, sizeof(addr));
1112
1113 while (parse_ip_val_buffer(ip_string, &offset, addr,
1114 (MAX_IP_ADDR_SIZE * 2))) {
1115
1116 sub_str[0] = 0;
1117 if (is_ipv4(addr)) {
1118 switch (type) {
1119 case IPADDR:
1120 snprintf(str, sizeof(str), "%s", "IPADDR");
1121 break;
1122 case NETMASK:
1123 snprintf(str, sizeof(str), "%s", "NETMASK");
1124 break;
1125 case GATEWAY:
1126 snprintf(str, sizeof(str), "%s", "GATEWAY");
1127 break;
1128 case DNS:
1129 snprintf(str, sizeof(str), "%s", "DNS");
1130 break;
1131 }
Tomas Hozza0783d722013-01-13 22:27:40 +01001132
1133 if (type == DNS) {
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001134 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
Tomas Hozza0783d722013-01-13 22:27:40 +01001135 } else if (type == GATEWAY && i == 0) {
1136 ++i;
1137 } else {
1138 snprintf(sub_str, sizeof(sub_str), "%d", i++);
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001139 }
1140
1141
1142 } else if (expand_ipv6(addr, type)) {
1143 switch (type) {
1144 case IPADDR:
1145 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1146 break;
1147 case NETMASK:
1148 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1149 break;
1150 case GATEWAY:
1151 snprintf(str, sizeof(str), "%s",
1152 "IPV6_DEFAULTGW");
1153 break;
1154 case DNS:
1155 snprintf(str, sizeof(str), "%s", "DNS");
1156 break;
1157 }
Tomas Hozza0783d722013-01-13 22:27:40 +01001158
1159 if (type == DNS) {
1160 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1161 } else if (j == 0) {
1162 ++j;
1163 } else {
1164 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001165 }
1166 } else {
1167 return HV_INVALIDARG;
1168 }
1169
1170 error = kvp_write_file(f, str, sub_str, addr);
1171 if (error)
1172 return error;
1173 memset(addr, 0, sizeof(addr));
1174 }
1175
1176 return 0;
1177}
1178
1179static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1180{
1181 int error = 0;
1182 char if_file[128];
1183 FILE *file;
1184 char cmd[512];
1185 char *mac_addr;
1186
1187 /*
1188 * Set the configuration for the specified interface with
1189 * the information provided. Since there is no standard
1190 * way to configure an interface, we will have an external
1191 * script that does the job of configuring the interface and
1192 * flushing the configuration.
1193 *
1194 * The parameters passed to this external script are:
1195 * 1. A configuration file that has the specified configuration.
1196 *
1197 * We will embed the name of the interface in the configuration
1198 * file: ifcfg-ethx (where ethx is the interface name).
1199 *
1200 * The information provided here may be more than what is needed
1201 * in a given distro to configure the interface and so are free
1202 * ignore information that may not be relevant.
1203 *
1204 * Here is the format of the ip configuration file:
1205 *
1206 * HWADDR=macaddr
Tomas Hozza0783d722013-01-13 22:27:40 +01001207 * DEVICE=interface name
1208 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1209 * or "none" if no boot-time protocol should be used)
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001210 *
Tomas Hozza0783d722013-01-13 22:27:40 +01001211 * IPADDR0=ipaddr1
1212 * IPADDR1=ipaddr2
1213 * IPADDRx=ipaddry (where y = x + 1)
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001214 *
Tomas Hozza0783d722013-01-13 22:27:40 +01001215 * NETMASK0=netmask1
1216 * NETMASKx=netmasky (where y = x + 1)
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001217 *
1218 * GATEWAY=ipaddr1
Tomas Hozza0783d722013-01-13 22:27:40 +01001219 * GATEWAYx=ipaddry (where y = x + 1)
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001220 *
1221 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1222 *
1223 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1224 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1225 * IPV6NETMASK.
1226 *
1227 * The host can specify multiple ipv4 and ipv6 addresses to be
1228 * configured for the interface. Furthermore, the configuration
1229 * needs to be persistent. A subsequent GET call on the interface
1230 * is expected to return the configuration that is set via the SET
1231 * call.
1232 */
1233
1234 snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
Tomas Hozza40424f52012-11-27 08:56:33 +01001235 "/ifcfg-", if_name);
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001236
1237 file = fopen(if_file, "w");
1238
1239 if (file == NULL) {
Tomas Hozza12e50c32013-06-17 10:39:44 +02001240 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1241 errno, strerror(errno));
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001242 return HV_E_FAIL;
1243 }
1244
1245 /*
1246 * First write out the MAC address.
1247 */
1248
1249 mac_addr = kvp_if_name_to_mac(if_name);
1250 if (mac_addr == NULL) {
1251 error = HV_E_FAIL;
1252 goto setval_error;
1253 }
1254
1255 error = kvp_write_file(file, "HWADDR", "", mac_addr);
Olaf Hering57969af2013-08-04 16:41:24 +02001256 free(mac_addr);
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001257 if (error)
1258 goto setval_error;
1259
Tomas Hozza0783d722013-01-13 22:27:40 +01001260 error = kvp_write_file(file, "DEVICE", "", if_name);
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001261 if (error)
1262 goto setval_error;
1263
Dexuan Cui787d6182014-12-10 03:33:20 -08001264 /*
1265 * The dhcp_enabled flag is only for IPv4. In the case the host only
1266 * injects an IPv6 address, the flag is true, but we still need to
1267 * proceed to parse and pass the IPv6 information to the
1268 * disto-specific script hv_set_ifconfig.
1269 */
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001270 if (new_val->dhcp_enabled) {
Tomas Hozza0783d722013-01-13 22:27:40 +01001271 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001272 if (error)
1273 goto setval_error;
1274
Tomas Hozza0783d722013-01-13 22:27:40 +01001275 } else {
1276 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1277 if (error)
1278 goto setval_error;
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001279 }
1280
1281 /*
1282 * Write the configuration for ipaddress, netmask, gateway and
1283 * name servers.
1284 */
1285
1286 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1287 if (error)
1288 goto setval_error;
1289
1290 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1291 if (error)
1292 goto setval_error;
1293
1294 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1295 if (error)
1296 goto setval_error;
1297
1298 error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1299 if (error)
1300 goto setval_error;
1301
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001302 fclose(file);
1303
1304 /*
1305 * Now that we have populated the configuration file,
1306 * invoke the external script to do its magic.
1307 */
1308
1309 snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
Olaf Heringd3b688c2013-08-04 16:40:44 +02001310 if (system(cmd)) {
1311 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1312 cmd, errno, strerror(errno));
1313 return HV_E_FAIL;
1314 }
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001315 return 0;
1316
1317setval_error:
1318 syslog(LOG_ERR, "Failed to write config file");
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001319 fclose(file);
1320 return error;
1321}
1322
1323
Olaf Hering581252102013-08-07 19:14:37 +02001324static void
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001325kvp_get_domain_name(char *buffer, int length)
1326{
1327 struct addrinfo hints, *info ;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001328 int error = 0;
1329
K. Y. Srinivasan5be528c2011-07-26 11:03:10 -07001330 gethostname(buffer, length);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001331 memset(&hints, 0, sizeof(hints));
1332 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1333 hints.ai_socktype = SOCK_STREAM;
1334 hints.ai_flags = AI_CANONNAME;
1335
K. Y. Srinivasan5be528c2011-07-26 11:03:10 -07001336 error = getaddrinfo(buffer, NULL, &hints, &info);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001337 if (error != 0) {
Olaf Hering581252102013-08-07 19:14:37 +02001338 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1339 error, gai_strerror(error));
1340 return;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001341 }
Olaf Hering581252102013-08-07 19:14:37 +02001342 snprintf(buffer, length, "%s", info->ai_canonname);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001343 freeaddrinfo(info);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001344}
1345
Vitaly Kuznetsov170f4be2014-10-22 18:07:11 +02001346void print_usage(char *argv[])
1347{
1348 fprintf(stderr, "Usage: %s [options]\n"
1349 "Options are:\n"
1350 " -n, --no-daemon stay in foreground, don't daemonize\n"
1351 " -h, --help print this help\n", argv[0]);
1352}
1353
1354int main(int argc, char *argv[])
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001355{
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001356 int kvp_fd, len;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001357 int error;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001358 struct pollfd pfd;
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001359 char *p;
1360 struct hv_kvp_msg hv_msg[1];
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001361 char *key_value;
1362 char *key_name;
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001363 int op;
1364 int pool;
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001365 char *if_name;
1366 struct hv_kvp_ipaddr_value *kvp_ip_val;
Vitaly Kuznetsov170f4be2014-10-22 18:07:11 +02001367 int daemonize = 1, long_index = 0, opt;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001368
Vitaly Kuznetsov170f4be2014-10-22 18:07:11 +02001369 static struct option long_options[] = {
1370 {"help", no_argument, 0, 'h' },
1371 {"no-daemon", no_argument, 0, 'n' },
1372 {0, 0, 0, 0 }
1373 };
1374
1375 while ((opt = getopt_long(argc, argv, "hn", long_options,
1376 &long_index)) != -1) {
1377 switch (opt) {
1378 case 'n':
1379 daemonize = 0;
1380 break;
1381 case 'h':
1382 default:
1383 print_usage(argv);
1384 exit(EXIT_FAILURE);
1385 }
1386 }
1387
1388 if (daemonize && daemon(1, 0))
Olaf Hering00663d72013-08-01 14:43:12 +02001389 return 1;
Vitaly Kuznetsov170f4be2014-10-22 18:07:11 +02001390
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001391 openlog("KVP", 0, LOG_USER);
1392 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
Olaf Heringb4919a52013-08-01 14:34:26 +02001393
Vitaly Kuznetsov26840432016-07-06 18:24:10 -07001394 kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC);
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001395
1396 if (kvp_fd < 0) {
1397 syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s",
1398 errno, strerror(errno));
Olaf Heringb4919a52013-08-01 14:34:26 +02001399 exit(EXIT_FAILURE);
1400 }
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001401
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001402 /*
1403 * Retrieve OS release information.
1404 */
1405 kvp_get_os_info();
Olaf Hering581252102013-08-07 19:14:37 +02001406 /*
1407 * Cache Fully Qualified Domain Name because getaddrinfo takes an
1408 * unpredictable amount of time to finish.
1409 */
1410 kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001411
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001412 if (kvp_file_init()) {
1413 syslog(LOG_ERR, "Failed to initialize the pools");
Ben Hutchings6bb22fe2012-09-05 14:37:36 -07001414 exit(EXIT_FAILURE);
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001415 }
1416
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001417 /*
1418 * Register ourselves with the kernel.
1419 */
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001420 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001421 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1422 if (len != sizeof(struct hv_kvp_msg)) {
1423 syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
1424 errno, strerror(errno));
1425 close(kvp_fd);
Ben Hutchings6bb22fe2012-09-05 14:37:36 -07001426 exit(EXIT_FAILURE);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001427 }
1428
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001429 pfd.fd = kvp_fd;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001430
1431 while (1) {
1432 pfd.events = POLLIN;
1433 pfd.revents = 0;
Tomas Hozza4d81e302013-05-22 14:54:31 +02001434
1435 if (poll(&pfd, 1, -1) < 0) {
1436 syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1437 if (errno == EINVAL) {
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001438 close(kvp_fd);
Tomas Hozza4d81e302013-05-22 14:54:31 +02001439 exit(EXIT_FAILURE);
1440 }
1441 else
1442 continue;
1443 }
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001444
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001445 len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001446
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001447 if (len != sizeof(struct hv_kvp_msg)) {
1448 syslog(LOG_ERR, "read failed; error:%d %s",
1449 errno, strerror(errno));
Dexuan Cui4300f262014-11-19 21:51:22 -08001450
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001451 close(kvp_fd);
1452 return EXIT_FAILURE;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001453 }
1454
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001455 /*
1456 * We will use the KVP header information to pass back
1457 * the error from this daemon. So, first copy the state
1458 * and set the error code to success.
1459 */
1460 op = hv_msg->kvp_hdr.operation;
1461 pool = hv_msg->kvp_hdr.pool;
1462 hv_msg->error = HV_S_OK;
1463
1464 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001465 /*
1466 * Driver is registering with us; stash away the version
1467 * information.
1468 */
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001469 in_hand_shake = 0;
K. Y. Srinivasane485ceac2012-03-10 15:32:08 -08001470 p = (char *)hv_msg->body.kvp_register.version;
Olaf Hering7989f7d2011-03-22 10:02:17 +01001471 lic_version = malloc(strlen(p) + 1);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001472 if (lic_version) {
Olaf Hering7989f7d2011-03-22 10:02:17 +01001473 strcpy(lic_version, p);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001474 syslog(LOG_INFO, "KVP LIC Version: %s",
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001475 lic_version);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001476 } else {
1477 syslog(LOG_ERR, "malloc failed");
1478 }
1479 continue;
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001480 }
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001481
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001482 switch (op) {
K. Y. Srinivasan16e87102012-09-05 13:50:15 -07001483 case KVP_OP_GET_IP_INFO:
1484 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1485 if_name =
1486 kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1487
1488 if (if_name == NULL) {
1489 /*
1490 * We could not map the mac address to an
1491 * interface name; return error.
1492 */
1493 hv_msg->error = HV_E_FAIL;
1494 break;
1495 }
1496 error = kvp_get_ip_info(
1497 0, if_name, KVP_OP_GET_IP_INFO,
1498 kvp_ip_val,
1499 (MAX_IP_ADDR_SIZE * 2));
1500
1501 if (error)
1502 hv_msg->error = error;
1503
1504 free(if_name);
1505 break;
1506
K. Y. Srinivasan32061b42012-09-05 13:50:13 -07001507 case KVP_OP_SET_IP_INFO:
1508 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1509 if_name = kvp_get_if_name(
1510 (char *)kvp_ip_val->adapter_id);
1511 if (if_name == NULL) {
1512 /*
1513 * We could not map the guid to an
1514 * interface name; return error.
1515 */
1516 hv_msg->error = HV_GUID_NOTFOUND;
1517 break;
1518 }
1519 error = kvp_set_ip_info(if_name, kvp_ip_val);
1520 if (error)
1521 hv_msg->error = error;
1522
1523 free(if_name);
1524 break;
1525
K. Y. Srinivasanfa3d5b82012-03-16 08:02:25 -07001526 case KVP_OP_SET:
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001527 if (kvp_key_add_or_modify(pool,
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001528 hv_msg->body.kvp_set.data.key,
1529 hv_msg->body.kvp_set.data.key_size,
1530 hv_msg->body.kvp_set.data.value,
1531 hv_msg->body.kvp_set.data.value_size))
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001532 hv_msg->error = HV_S_CONT;
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001533 break;
1534
K. Y. Srinivasanfa3d5b82012-03-16 08:02:25 -07001535 case KVP_OP_GET:
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001536 if (kvp_get_value(pool,
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001537 hv_msg->body.kvp_set.data.key,
1538 hv_msg->body.kvp_set.data.key_size,
1539 hv_msg->body.kvp_set.data.value,
1540 hv_msg->body.kvp_set.data.value_size))
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001541 hv_msg->error = HV_S_CONT;
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001542 break;
1543
K. Y. Srinivasanfa3d5b82012-03-16 08:02:25 -07001544 case KVP_OP_DELETE:
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001545 if (kvp_key_delete(pool,
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001546 hv_msg->body.kvp_delete.key,
1547 hv_msg->body.kvp_delete.key_size))
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001548 hv_msg->error = HV_S_CONT;
K. Y. Srinivasandb425332012-03-16 08:02:26 -07001549 break;
1550
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001551 default:
K. Y. Srinivasan2640335432012-02-02 16:56:50 -08001552 break;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001553 }
1554
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001555 if (op != KVP_OP_ENUMERATE)
K. Y. Srinivasanfa3d5b82012-03-16 08:02:25 -07001556 goto kvp_done;
1557
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -07001558 /*
1559 * If the pool is KVP_POOL_AUTO, dynamically generate
1560 * both the key and the value; if not read from the
1561 * appropriate pool.
1562 */
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001563 if (pool != KVP_POOL_AUTO) {
1564 if (kvp_pool_enumerate(pool,
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -07001565 hv_msg->body.kvp_enum_data.index,
1566 hv_msg->body.kvp_enum_data.data.key,
1567 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1568 hv_msg->body.kvp_enum_data.data.value,
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001569 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1570 hv_msg->error = HV_S_CONT;
K. Y. Srinivasanadc80ae2012-03-16 08:02:27 -07001571 goto kvp_done;
1572 }
1573
K. Y. Srinivasan2640335432012-02-02 16:56:50 -08001574 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1575 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001576
K. Y. Srinivasan2640335432012-02-02 16:56:50 -08001577 switch (hv_msg->body.kvp_enum_data.index) {
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001578 case FullyQualifiedDomainName:
Olaf Hering581252102013-08-07 19:14:37 +02001579 strcpy(key_value, full_domain_name);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001580 strcpy(key_name, "FullyQualifiedDomainName");
1581 break;
1582 case IntegrationServicesVersion:
1583 strcpy(key_name, "IntegrationServicesVersion");
1584 strcpy(key_value, lic_version);
1585 break;
1586 case NetworkAddressIPv4:
K. Y. Srinivasan4a3b97e52012-09-05 13:50:14 -07001587 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -07001588 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001589 strcpy(key_name, "NetworkAddressIPv4");
1590 break;
1591 case NetworkAddressIPv6:
K. Y. Srinivasan4a3b97e52012-09-05 13:50:14 -07001592 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
K. Y. Srinivasan0ecaa192012-08-16 18:32:13 -07001593 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001594 strcpy(key_name, "NetworkAddressIPv6");
1595 break;
1596 case OSBuildNumber:
1597 strcpy(key_value, os_build);
1598 strcpy(key_name, "OSBuildNumber");
1599 break;
1600 case OSName:
1601 strcpy(key_value, os_name);
1602 strcpy(key_name, "OSName");
1603 break;
1604 case OSMajorVersion:
1605 strcpy(key_value, os_major);
1606 strcpy(key_name, "OSMajorVersion");
1607 break;
1608 case OSMinorVersion:
1609 strcpy(key_value, os_minor);
1610 strcpy(key_name, "OSMinorVersion");
1611 break;
1612 case OSVersion:
K. Y. Srinivasanf426a362012-10-25 14:15:49 -07001613 strcpy(key_value, os_version);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001614 strcpy(key_name, "OSVersion");
1615 break;
1616 case ProcessorArchitecture:
1617 strcpy(key_value, processor_arch);
1618 strcpy(key_name, "ProcessorArchitecture");
1619 break;
1620 default:
K. Y. Srinivasanb47a81d2012-08-13 10:06:52 -07001621 hv_msg->error = HV_S_CONT;
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001622 break;
1623 }
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001624
1625 /* Send the value back to the kernel. */
K. Y. Srinivasanfa3d5b82012-03-16 08:02:25 -07001626kvp_done:
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001627 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1628 if (len != sizeof(struct hv_kvp_msg)) {
1629 syslog(LOG_ERR, "write failed; error: %d %s", errno,
1630 strerror(errno));
Ben Hutchings6bb22fe2012-09-05 14:37:36 -07001631 exit(EXIT_FAILURE);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001632 }
1633 }
1634
Vitaly Kuznetsov8ddca8082015-04-11 18:07:55 -07001635 close(kvp_fd);
1636 exit(0);
Ky Srinivasancc04acf2010-12-16 18:56:54 -07001637}