Commit | Line | Data |
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cc04acf5 KS |
1 | /* |
2 | * An implementation of key value pair (KVP) functionality for Linux. | |
3 | * | |
4 | * | |
5 | * Copyright (C) 2010, Novell, Inc. | |
6 | * Author : K. Y. Srinivasan <ksrinivasan@novell.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License version 2 as published | |
10 | * by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
15 | * NON INFRINGEMENT. See the GNU General Public License for more | |
16 | * details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | * | |
22 | */ | |
23 | ||
24 | ||
25 | #include <sys/types.h> | |
26 | #include <sys/socket.h> | |
27 | #include <sys/poll.h> | |
28 | #include <sys/utsname.h> | |
cc04acf5 KS |
29 | #include <stdio.h> |
30 | #include <stdlib.h> | |
31 | #include <unistd.h> | |
32 | #include <string.h> | |
32061b4d | 33 | #include <ctype.h> |
cc04acf5 KS |
34 | #include <errno.h> |
35 | #include <arpa/inet.h> | |
36 | #include <linux/connector.h> | |
eab6af71 | 37 | #include <linux/hyperv.h> |
cc04acf5 | 38 | #include <linux/netlink.h> |
cc04acf5 KS |
39 | #include <ifaddrs.h> |
40 | #include <netdb.h> | |
41 | #include <syslog.h> | |
db425334 S |
42 | #include <sys/stat.h> |
43 | #include <fcntl.h> | |
32061b4d | 44 | #include <dirent.h> |
3321e738 | 45 | #include <net/if.h> |
cc04acf5 KS |
46 | |
47 | /* | |
48 | * KVP protocol: The user mode component first registers with the | |
49 | * the kernel component. Subsequently, the kernel component requests, data | |
50 | * for the specified keys. In response to this message the user mode component | |
51 | * fills in the value corresponding to the specified key. We overload the | |
52 | * sequence field in the cn_msg header to define our KVP message types. | |
53 | * | |
54 | * We use this infrastructure for also supporting queries from user mode | |
55 | * application for state that may be maintained in the KVP kernel component. | |
56 | * | |
cc04acf5 KS |
57 | */ |
58 | ||
cc04acf5 KS |
59 | |
60 | enum key_index { | |
61 | FullyQualifiedDomainName = 0, | |
62 | IntegrationServicesVersion, /*This key is serviced in the kernel*/ | |
63 | NetworkAddressIPv4, | |
64 | NetworkAddressIPv6, | |
65 | OSBuildNumber, | |
66 | OSName, | |
67 | OSMajorVersion, | |
68 | OSMinorVersion, | |
69 | OSVersion, | |
70 | ProcessorArchitecture | |
71 | }; | |
72 | ||
32061b4d S |
73 | |
74 | enum { | |
75 | IPADDR = 0, | |
76 | NETMASK, | |
77 | GATEWAY, | |
78 | DNS | |
79 | }; | |
80 | ||
cc04acf5 | 81 | static struct sockaddr_nl addr; |
b47a81dc | 82 | static int in_hand_shake = 1; |
cc04acf5 | 83 | |
7989f7d5 OH |
84 | static char *os_name = ""; |
85 | static char *os_major = ""; | |
86 | static char *os_minor = ""; | |
87 | static char *processor_arch; | |
88 | static char *os_build; | |
f426a36c | 89 | static char *os_version; |
b47a81dc | 90 | static char *lic_version = "Unknown version"; |
58125210 | 91 | static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; |
7989f7d5 | 92 | static struct utsname uts_buf; |
cc04acf5 | 93 | |
32061b4d S |
94 | /* |
95 | * The location of the interface configuration file. | |
96 | */ | |
97 | ||
40424f5f | 98 | #define KVP_CONFIG_LOC "/var/lib/hyperv" |
db425334 S |
99 | |
100 | #define MAX_FILE_NAME 100 | |
101 | #define ENTRIES_PER_BLOCK 50 | |
102 | ||
f4685fa6 TH |
103 | #ifndef SOL_NETLINK |
104 | #define SOL_NETLINK 270 | |
105 | #endif | |
106 | ||
db425334 | 107 | struct kvp_record { |
d0cbc156 S |
108 | char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; |
109 | char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; | |
db425334 S |
110 | }; |
111 | ||
112 | struct kvp_file_state { | |
113 | int fd; | |
114 | int num_blocks; | |
115 | struct kvp_record *records; | |
116 | int num_records; | |
d0cbc156 | 117 | char fname[MAX_FILE_NAME]; |
db425334 S |
118 | }; |
119 | ||
120 | static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT]; | |
121 | ||
122 | static void kvp_acquire_lock(int pool) | |
123 | { | |
124 | struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0}; | |
125 | fl.l_pid = getpid(); | |
126 | ||
127 | if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) { | |
12e50c30 TH |
128 | syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool, |
129 | errno, strerror(errno)); | |
6bb22fea | 130 | exit(EXIT_FAILURE); |
db425334 S |
131 | } |
132 | } | |
133 | ||
134 | static void kvp_release_lock(int pool) | |
135 | { | |
136 | struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0}; | |
137 | fl.l_pid = getpid(); | |
138 | ||
139 | if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) { | |
12e50c30 TH |
140 | syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool, |
141 | errno, strerror(errno)); | |
6bb22fea | 142 | exit(EXIT_FAILURE); |
db425334 S |
143 | } |
144 | } | |
145 | ||
146 | static void kvp_update_file(int pool) | |
147 | { | |
148 | FILE *filep; | |
149 | size_t bytes_written; | |
150 | ||
151 | /* | |
152 | * We are going to write our in-memory registry out to | |
153 | * disk; acquire the lock first. | |
154 | */ | |
155 | kvp_acquire_lock(pool); | |
156 | ||
8467fdbb | 157 | filep = fopen(kvp_file_info[pool].fname, "we"); |
db425334 | 158 | if (!filep) { |
12e50c30 TH |
159 | syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, |
160 | errno, strerror(errno)); | |
db425334 | 161 | kvp_release_lock(pool); |
6bb22fea | 162 | exit(EXIT_FAILURE); |
db425334 S |
163 | } |
164 | ||
165 | bytes_written = fwrite(kvp_file_info[pool].records, | |
166 | sizeof(struct kvp_record), | |
167 | kvp_file_info[pool].num_records, filep); | |
168 | ||
436473bc BH |
169 | if (ferror(filep) || fclose(filep)) { |
170 | kvp_release_lock(pool); | |
171 | syslog(LOG_ERR, "Failed to write file, pool: %d", pool); | |
172 | exit(EXIT_FAILURE); | |
173 | } | |
174 | ||
db425334 S |
175 | kvp_release_lock(pool); |
176 | } | |
177 | ||
adc80ae6 S |
178 | static void kvp_update_mem_state(int pool) |
179 | { | |
180 | FILE *filep; | |
181 | size_t records_read = 0; | |
182 | struct kvp_record *record = kvp_file_info[pool].records; | |
183 | struct kvp_record *readp; | |
184 | int num_blocks = kvp_file_info[pool].num_blocks; | |
185 | int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; | |
186 | ||
187 | kvp_acquire_lock(pool); | |
188 | ||
8467fdbb | 189 | filep = fopen(kvp_file_info[pool].fname, "re"); |
adc80ae6 | 190 | if (!filep) { |
12e50c30 TH |
191 | syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, |
192 | errno, strerror(errno)); | |
adc80ae6 | 193 | kvp_release_lock(pool); |
6bb22fea | 194 | exit(EXIT_FAILURE); |
adc80ae6 | 195 | } |
436473bc | 196 | for (;;) { |
adc80ae6 S |
197 | readp = &record[records_read]; |
198 | records_read += fread(readp, sizeof(struct kvp_record), | |
199 | ENTRIES_PER_BLOCK * num_blocks, | |
200 | filep); | |
201 | ||
436473bc BH |
202 | if (ferror(filep)) { |
203 | syslog(LOG_ERR, "Failed to read file, pool: %d", pool); | |
204 | exit(EXIT_FAILURE); | |
205 | } | |
206 | ||
adc80ae6 S |
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"); | |
6bb22fea | 216 | exit(EXIT_FAILURE); |
adc80ae6 S |
217 | } |
218 | continue; | |
219 | } | |
220 | break; | |
221 | } | |
222 | ||
223 | kvp_file_info[pool].num_blocks = num_blocks; | |
224 | kvp_file_info[pool].records = record; | |
225 | kvp_file_info[pool].num_records = records_read; | |
226 | ||
d5ab4827 | 227 | fclose(filep); |
adc80ae6 S |
228 | kvp_release_lock(pool); |
229 | } | |
db425334 S |
230 | static int kvp_file_init(void) |
231 | { | |
00b83355 | 232 | int fd; |
db425334 S |
233 | FILE *filep; |
234 | size_t records_read; | |
d0cbc156 | 235 | char *fname; |
db425334 S |
236 | struct kvp_record *record; |
237 | struct kvp_record *readp; | |
238 | int num_blocks; | |
239 | int i; | |
240 | int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; | |
241 | ||
40424f5f | 242 | if (access(KVP_CONFIG_LOC, F_OK)) { |
0bffd25c | 243 | if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) { |
12e50c30 TH |
244 | syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC, |
245 | errno, strerror(errno)); | |
6bb22fea | 246 | exit(EXIT_FAILURE); |
db425334 S |
247 | } |
248 | } | |
249 | ||
250 | for (i = 0; i < KVP_POOL_COUNT; i++) { | |
251 | fname = kvp_file_info[i].fname; | |
252 | records_read = 0; | |
253 | num_blocks = 1; | |
40424f5f | 254 | sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i); |
8467fdbb | 255 | fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */); |
db425334 S |
256 | |
257 | if (fd == -1) | |
258 | return 1; | |
259 | ||
260 | ||
8467fdbb | 261 | filep = fopen(fname, "re"); |
fca59755 TH |
262 | if (!filep) { |
263 | close(fd); | |
db425334 | 264 | return 1; |
fca59755 | 265 | } |
db425334 S |
266 | |
267 | record = malloc(alloc_unit * num_blocks); | |
268 | if (record == NULL) { | |
269 | fclose(filep); | |
fca59755 | 270 | close(fd); |
db425334 S |
271 | return 1; |
272 | } | |
436473bc | 273 | for (;;) { |
db425334 S |
274 | readp = &record[records_read]; |
275 | records_read += fread(readp, sizeof(struct kvp_record), | |
276 | ENTRIES_PER_BLOCK, | |
277 | filep); | |
278 | ||
436473bc BH |
279 | if (ferror(filep)) { |
280 | syslog(LOG_ERR, "Failed to read file, pool: %d", | |
281 | i); | |
282 | exit(EXIT_FAILURE); | |
283 | } | |
284 | ||
db425334 S |
285 | if (!feof(filep)) { |
286 | /* | |
287 | * We have more data to read. | |
288 | */ | |
289 | num_blocks++; | |
290 | record = realloc(record, alloc_unit * | |
291 | num_blocks); | |
292 | if (record == NULL) { | |
293 | fclose(filep); | |
fca59755 | 294 | close(fd); |
db425334 S |
295 | return 1; |
296 | } | |
297 | continue; | |
298 | } | |
299 | break; | |
300 | } | |
301 | kvp_file_info[i].fd = fd; | |
302 | kvp_file_info[i].num_blocks = num_blocks; | |
303 | kvp_file_info[i].records = record; | |
304 | kvp_file_info[i].num_records = records_read; | |
305 | fclose(filep); | |
306 | ||
307 | } | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
d892de8d | 312 | static int kvp_key_delete(int pool, const char *key, int key_size) |
db425334 S |
313 | { |
314 | int i; | |
315 | int j, k; | |
adc80ae6 S |
316 | int num_records; |
317 | struct kvp_record *record; | |
318 | ||
319 | /* | |
320 | * First update the in-memory state. | |
321 | */ | |
322 | kvp_update_mem_state(pool); | |
323 | ||
324 | num_records = kvp_file_info[pool].num_records; | |
325 | record = kvp_file_info[pool].records; | |
db425334 S |
326 | |
327 | for (i = 0; i < num_records; i++) { | |
328 | if (memcmp(key, record[i].key, key_size)) | |
329 | continue; | |
330 | /* | |
331 | * Found a match; just move the remaining | |
332 | * entries up. | |
333 | */ | |
334 | if (i == num_records) { | |
335 | kvp_file_info[pool].num_records--; | |
336 | kvp_update_file(pool); | |
337 | return 0; | |
338 | } | |
339 | ||
340 | j = i; | |
341 | k = j + 1; | |
342 | for (; k < num_records; k++) { | |
343 | strcpy(record[j].key, record[k].key); | |
344 | strcpy(record[j].value, record[k].value); | |
345 | j++; | |
346 | } | |
347 | ||
348 | kvp_file_info[pool].num_records--; | |
349 | kvp_update_file(pool); | |
350 | return 0; | |
351 | } | |
352 | return 1; | |
353 | } | |
354 | ||
d892de8d | 355 | static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value, |
db425334 S |
356 | int value_size) |
357 | { | |
358 | int i; | |
adc80ae6 S |
359 | int num_records; |
360 | struct kvp_record *record; | |
361 | int num_blocks; | |
db425334 S |
362 | |
363 | if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || | |
364 | (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) | |
365 | return 1; | |
366 | ||
adc80ae6 S |
367 | /* |
368 | * First update the in-memory state. | |
369 | */ | |
370 | kvp_update_mem_state(pool); | |
371 | ||
372 | num_records = kvp_file_info[pool].num_records; | |
373 | record = kvp_file_info[pool].records; | |
374 | num_blocks = kvp_file_info[pool].num_blocks; | |
375 | ||
db425334 S |
376 | for (i = 0; i < num_records; i++) { |
377 | if (memcmp(key, record[i].key, key_size)) | |
378 | continue; | |
379 | /* | |
380 | * Found a match; just update the value - | |
381 | * this is the modify case. | |
382 | */ | |
383 | memcpy(record[i].value, value, value_size); | |
384 | kvp_update_file(pool); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | /* | |
389 | * Need to add a new entry; | |
390 | */ | |
391 | if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) { | |
392 | /* Need to allocate a larger array for reg entries. */ | |
393 | record = realloc(record, sizeof(struct kvp_record) * | |
394 | ENTRIES_PER_BLOCK * (num_blocks + 1)); | |
395 | ||
396 | if (record == NULL) | |
397 | return 1; | |
398 | kvp_file_info[pool].num_blocks++; | |
399 | ||
400 | } | |
401 | memcpy(record[i].value, value, value_size); | |
402 | memcpy(record[i].key, key, key_size); | |
403 | kvp_file_info[pool].records = record; | |
404 | kvp_file_info[pool].num_records++; | |
405 | kvp_update_file(pool); | |
406 | return 0; | |
407 | } | |
408 | ||
d892de8d | 409 | static int kvp_get_value(int pool, const char *key, int key_size, char *value, |
db425334 S |
410 | int value_size) |
411 | { | |
412 | int i; | |
adc80ae6 S |
413 | int num_records; |
414 | struct kvp_record *record; | |
db425334 S |
415 | |
416 | if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || | |
417 | (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) | |
418 | return 1; | |
419 | ||
adc80ae6 S |
420 | /* |
421 | * First update the in-memory state. | |
422 | */ | |
423 | kvp_update_mem_state(pool); | |
424 | ||
425 | num_records = kvp_file_info[pool].num_records; | |
426 | record = kvp_file_info[pool].records; | |
427 | ||
db425334 S |
428 | for (i = 0; i < num_records; i++) { |
429 | if (memcmp(key, record[i].key, key_size)) | |
430 | continue; | |
431 | /* | |
432 | * Found a match; just copy the value out. | |
433 | */ | |
434 | memcpy(value, record[i].value, value_size); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | return 1; | |
439 | } | |
440 | ||
d892de8d TH |
441 | static int kvp_pool_enumerate(int pool, int index, char *key, int key_size, |
442 | char *value, int value_size) | |
adc80ae6 S |
443 | { |
444 | struct kvp_record *record; | |
445 | ||
446 | /* | |
447 | * First update our in-memory database. | |
448 | */ | |
449 | kvp_update_mem_state(pool); | |
450 | record = kvp_file_info[pool].records; | |
451 | ||
452 | if (index >= kvp_file_info[pool].num_records) { | |
b47a81dc | 453 | return 1; |
adc80ae6 S |
454 | } |
455 | ||
456 | memcpy(key, record[index].key, key_size); | |
457 | memcpy(value, record[index].value, value_size); | |
b47a81dc | 458 | return 0; |
adc80ae6 S |
459 | } |
460 | ||
461 | ||
cc04acf5 KS |
462 | void kvp_get_os_info(void) |
463 | { | |
464 | FILE *file; | |
7989f7d5 | 465 | char *p, buf[512]; |
cc04acf5 | 466 | |
7989f7d5 | 467 | uname(&uts_buf); |
f426a36c S |
468 | os_version = uts_buf.release; |
469 | os_build = strdup(uts_buf.release); | |
470 | ||
44c8b25f | 471 | os_name = uts_buf.sysname; |
064931d0 | 472 | processor_arch = uts_buf.machine; |
cc04acf5 | 473 | |
e54bbc64 S |
474 | /* |
475 | * The current windows host (win7) expects the build | |
476 | * string to be of the form: x.y.z | |
477 | * Strip additional information we may have. | |
478 | */ | |
f426a36c | 479 | p = strchr(os_version, '-'); |
e54bbc64 S |
480 | if (p) |
481 | *p = '\0'; | |
482 | ||
44c8b25f BH |
483 | /* |
484 | * Parse the /etc/os-release file if present: | |
485 | * http://www.freedesktop.org/software/systemd/man/os-release.html | |
486 | */ | |
487 | file = fopen("/etc/os-release", "r"); | |
488 | if (file != NULL) { | |
489 | while (fgets(buf, sizeof(buf), file)) { | |
490 | char *value, *q; | |
491 | ||
492 | /* Ignore comments */ | |
493 | if (buf[0] == '#') | |
494 | continue; | |
495 | ||
496 | /* Split into name=value */ | |
497 | p = strchr(buf, '='); | |
498 | if (!p) | |
499 | continue; | |
500 | *p++ = 0; | |
501 | ||
502 | /* Remove quotes and newline; un-escape */ | |
503 | value = p; | |
504 | q = p; | |
505 | while (*p) { | |
506 | if (*p == '\\') { | |
507 | ++p; | |
508 | if (!*p) | |
509 | break; | |
510 | *q++ = *p++; | |
511 | } else if (*p == '\'' || *p == '"' || | |
512 | *p == '\n') { | |
513 | ++p; | |
514 | } else { | |
515 | *q++ = *p++; | |
516 | } | |
517 | } | |
518 | *q = 0; | |
519 | ||
520 | if (!strcmp(buf, "NAME")) { | |
521 | p = strdup(value); | |
522 | if (!p) | |
523 | break; | |
524 | os_name = p; | |
525 | } else if (!strcmp(buf, "VERSION_ID")) { | |
526 | p = strdup(value); | |
527 | if (!p) | |
528 | break; | |
529 | os_major = p; | |
530 | } | |
531 | } | |
532 | fclose(file); | |
533 | return; | |
534 | } | |
535 | ||
536 | /* Fallback for older RH/SUSE releases */ | |
cc04acf5 KS |
537 | file = fopen("/etc/SuSE-release", "r"); |
538 | if (file != NULL) | |
539 | goto kvp_osinfo_found; | |
540 | file = fopen("/etc/redhat-release", "r"); | |
541 | if (file != NULL) | |
542 | goto kvp_osinfo_found; | |
cc04acf5 KS |
543 | |
544 | /* | |
545 | * We don't have information about the os. | |
546 | */ | |
cc04acf5 KS |
547 | return; |
548 | ||
549 | kvp_osinfo_found: | |
7989f7d5 OH |
550 | /* up to three lines */ |
551 | p = fgets(buf, sizeof(buf), file); | |
552 | if (p) { | |
553 | p = strchr(buf, '\n'); | |
554 | if (p) | |
555 | *p = '\0'; | |
556 | p = strdup(buf); | |
557 | if (!p) | |
558 | goto done; | |
559 | os_name = p; | |
560 | ||
561 | /* second line */ | |
562 | p = fgets(buf, sizeof(buf), file); | |
563 | if (p) { | |
564 | p = strchr(buf, '\n'); | |
565 | if (p) | |
566 | *p = '\0'; | |
567 | p = strdup(buf); | |
568 | if (!p) | |
569 | goto done; | |
570 | os_major = p; | |
571 | ||
572 | /* third line */ | |
573 | p = fgets(buf, sizeof(buf), file); | |
574 | if (p) { | |
575 | p = strchr(buf, '\n'); | |
576 | if (p) | |
577 | *p = '\0'; | |
578 | p = strdup(buf); | |
579 | if (p) | |
580 | os_minor = p; | |
581 | } | |
582 | } | |
583 | } | |
584 | ||
585 | done: | |
cc04acf5 KS |
586 | fclose(file); |
587 | return; | |
588 | } | |
589 | ||
32061b4d S |
590 | |
591 | ||
592 | /* | |
593 | * Retrieve an interface name corresponding to the specified guid. | |
594 | * If there is a match, the function returns a pointer | |
595 | * to the interface name and if not, a NULL is returned. | |
596 | * If a match is found, the caller is responsible for | |
597 | * freeing the memory. | |
598 | */ | |
599 | ||
600 | static char *kvp_get_if_name(char *guid) | |
601 | { | |
602 | DIR *dir; | |
603 | struct dirent *entry; | |
604 | FILE *file; | |
605 | char *p, *q, *x; | |
606 | char *if_name = NULL; | |
607 | char buf[256]; | |
608 | char *kvp_net_dir = "/sys/class/net/"; | |
609 | char dev_id[256]; | |
610 | ||
611 | dir = opendir(kvp_net_dir); | |
612 | if (dir == NULL) | |
613 | return NULL; | |
614 | ||
615 | snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir); | |
616 | q = dev_id + strlen(kvp_net_dir); | |
617 | ||
618 | while ((entry = readdir(dir)) != NULL) { | |
619 | /* | |
620 | * Set the state for the next pass. | |
621 | */ | |
622 | *q = '\0'; | |
623 | strcat(dev_id, entry->d_name); | |
624 | strcat(dev_id, "/device/device_id"); | |
625 | ||
626 | file = fopen(dev_id, "r"); | |
627 | if (file == NULL) | |
628 | continue; | |
629 | ||
630 | p = fgets(buf, sizeof(buf), file); | |
631 | if (p) { | |
632 | x = strchr(p, '\n'); | |
633 | if (x) | |
634 | *x = '\0'; | |
635 | ||
636 | if (!strcmp(p, guid)) { | |
637 | /* | |
638 | * Found the guid match; return the interface | |
639 | * name. The caller will free the memory. | |
640 | */ | |
641 | if_name = strdup(entry->d_name); | |
642 | fclose(file); | |
643 | break; | |
644 | } | |
645 | } | |
646 | fclose(file); | |
647 | } | |
648 | ||
649 | closedir(dir); | |
650 | return if_name; | |
651 | } | |
652 | ||
653 | /* | |
654 | * Retrieve the MAC address given the interface name. | |
655 | */ | |
656 | ||
657 | static char *kvp_if_name_to_mac(char *if_name) | |
658 | { | |
659 | FILE *file; | |
660 | char *p, *x; | |
661 | char buf[256]; | |
662 | char addr_file[256]; | |
663 | int i; | |
664 | char *mac_addr = NULL; | |
665 | ||
666 | snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/", | |
667 | if_name, "/address"); | |
668 | ||
669 | file = fopen(addr_file, "r"); | |
670 | if (file == NULL) | |
671 | return NULL; | |
672 | ||
673 | p = fgets(buf, sizeof(buf), file); | |
674 | if (p) { | |
675 | x = strchr(p, '\n'); | |
676 | if (x) | |
677 | *x = '\0'; | |
678 | for (i = 0; i < strlen(p); i++) | |
679 | p[i] = toupper(p[i]); | |
680 | mac_addr = strdup(p); | |
681 | } | |
682 | ||
683 | fclose(file); | |
684 | return mac_addr; | |
685 | } | |
686 | ||
687 | ||
16e87100 S |
688 | /* |
689 | * Retrieve the interface name given tha MAC address. | |
690 | */ | |
691 | ||
692 | static char *kvp_mac_to_if_name(char *mac) | |
693 | { | |
694 | DIR *dir; | |
695 | struct dirent *entry; | |
696 | FILE *file; | |
697 | char *p, *q, *x; | |
698 | char *if_name = NULL; | |
699 | char buf[256]; | |
700 | char *kvp_net_dir = "/sys/class/net/"; | |
701 | char dev_id[256]; | |
702 | int i; | |
703 | ||
704 | dir = opendir(kvp_net_dir); | |
705 | if (dir == NULL) | |
706 | return NULL; | |
707 | ||
708 | snprintf(dev_id, sizeof(dev_id), kvp_net_dir); | |
709 | q = dev_id + strlen(kvp_net_dir); | |
710 | ||
711 | while ((entry = readdir(dir)) != NULL) { | |
712 | /* | |
713 | * Set the state for the next pass. | |
714 | */ | |
715 | *q = '\0'; | |
716 | ||
717 | strcat(dev_id, entry->d_name); | |
718 | strcat(dev_id, "/address"); | |
719 | ||
720 | file = fopen(dev_id, "r"); | |
721 | if (file == NULL) | |
722 | continue; | |
723 | ||
724 | p = fgets(buf, sizeof(buf), file); | |
725 | if (p) { | |
726 | x = strchr(p, '\n'); | |
727 | if (x) | |
728 | *x = '\0'; | |
729 | ||
730 | for (i = 0; i < strlen(p); i++) | |
731 | p[i] = toupper(p[i]); | |
732 | ||
733 | if (!strcmp(p, mac)) { | |
734 | /* | |
735 | * Found the MAC match; return the interface | |
736 | * name. The caller will free the memory. | |
737 | */ | |
738 | if_name = strdup(entry->d_name); | |
739 | fclose(file); | |
740 | break; | |
741 | } | |
742 | } | |
743 | fclose(file); | |
744 | } | |
745 | ||
746 | closedir(dir); | |
747 | return if_name; | |
748 | } | |
749 | ||
750 | ||
4a52c4af S |
751 | static void kvp_process_ipconfig_file(char *cmd, |
752 | char *config_buf, int len, | |
753 | int element_size, int offset) | |
754 | { | |
755 | char buf[256]; | |
756 | char *p; | |
757 | char *x; | |
758 | FILE *file; | |
759 | ||
760 | /* | |
761 | * First execute the command. | |
762 | */ | |
763 | file = popen(cmd, "r"); | |
764 | if (file == NULL) | |
765 | return; | |
766 | ||
767 | if (offset == 0) | |
768 | memset(config_buf, 0, len); | |
769 | while ((p = fgets(buf, sizeof(buf), file)) != NULL) { | |
770 | if ((len - strlen(config_buf)) < (element_size + 1)) | |
771 | break; | |
772 | ||
773 | x = strchr(p, '\n'); | |
f14e600a TH |
774 | if (x) |
775 | *x = '\0'; | |
776 | ||
4a52c4af S |
777 | strcat(config_buf, p); |
778 | strcat(config_buf, ";"); | |
779 | } | |
780 | pclose(file); | |
781 | } | |
782 | ||
783 | static void kvp_get_ipconfig_info(char *if_name, | |
784 | struct hv_kvp_ipaddr_value *buffer) | |
785 | { | |
786 | char cmd[512]; | |
c0503725 S |
787 | char dhcp_info[128]; |
788 | char *p; | |
789 | FILE *file; | |
4a52c4af S |
790 | |
791 | /* | |
792 | * Get the address of default gateway (ipv4). | |
793 | */ | |
794 | sprintf(cmd, "%s %s", "ip route show dev", if_name); | |
795 | strcat(cmd, " | awk '/default/ {print $3 }'"); | |
796 | ||
797 | /* | |
798 | * Execute the command to gather gateway info. | |
799 | */ | |
800 | kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, | |
801 | (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0); | |
802 | ||
803 | /* | |
804 | * Get the address of default gateway (ipv6). | |
805 | */ | |
806 | sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name); | |
807 | strcat(cmd, " | awk '/default/ {print $3 }'"); | |
808 | ||
809 | /* | |
810 | * Execute the command to gather gateway info (ipv6). | |
811 | */ | |
812 | kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, | |
813 | (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1); | |
814 | ||
96929887 S |
815 | |
816 | /* | |
817 | * Gather the DNS state. | |
818 | * Since there is no standard way to get this information | |
819 | * across various distributions of interest; we just invoke | |
820 | * an external script that needs to be ported across distros | |
821 | * of interest. | |
822 | * | |
823 | * Following is the expected format of the information from the script: | |
824 | * | |
825 | * ipaddr1 (nameserver1) | |
826 | * ipaddr2 (nameserver2) | |
827 | * . | |
828 | * . | |
829 | */ | |
830 | ||
831 | sprintf(cmd, "%s", "hv_get_dns_info"); | |
832 | ||
833 | /* | |
834 | * Execute the command to gather DNS info. | |
835 | */ | |
836 | kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr, | |
837 | (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0); | |
c0503725 S |
838 | |
839 | /* | |
840 | * Gather the DHCP state. | |
841 | * We will gather this state by invoking an external script. | |
842 | * The parameter to the script is the interface name. | |
843 | * Here is the expected output: | |
844 | * | |
845 | * Enabled: DHCP enabled. | |
846 | */ | |
847 | ||
848 | sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name); | |
849 | ||
850 | file = popen(cmd, "r"); | |
851 | if (file == NULL) | |
852 | return; | |
853 | ||
854 | p = fgets(dhcp_info, sizeof(dhcp_info), file); | |
855 | if (p == NULL) { | |
856 | pclose(file); | |
857 | return; | |
858 | } | |
859 | ||
860 | if (!strncmp(p, "Enabled", 7)) | |
861 | buffer->dhcp_enabled = 1; | |
862 | else | |
863 | buffer->dhcp_enabled = 0; | |
864 | ||
865 | pclose(file); | |
4a52c4af S |
866 | } |
867 | ||
868 | ||
6a60a6a8 S |
869 | static unsigned int hweight32(unsigned int *w) |
870 | { | |
871 | unsigned int res = *w - ((*w >> 1) & 0x55555555); | |
872 | res = (res & 0x33333333) + ((res >> 2) & 0x33333333); | |
873 | res = (res + (res >> 4)) & 0x0F0F0F0F; | |
874 | res = res + (res >> 8); | |
875 | return (res + (res >> 16)) & 0x000000FF; | |
876 | } | |
877 | ||
af733015 S |
878 | static int kvp_process_ip_address(void *addrp, |
879 | int family, char *buffer, | |
880 | int length, int *offset) | |
881 | { | |
882 | struct sockaddr_in *addr; | |
883 | struct sockaddr_in6 *addr6; | |
884 | int addr_length; | |
885 | char tmp[50]; | |
886 | const char *str; | |
887 | ||
888 | if (family == AF_INET) { | |
889 | addr = (struct sockaddr_in *)addrp; | |
890 | str = inet_ntop(family, &addr->sin_addr, tmp, 50); | |
891 | addr_length = INET_ADDRSTRLEN; | |
892 | } else { | |
893 | addr6 = (struct sockaddr_in6 *)addrp; | |
894 | str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50); | |
895 | addr_length = INET6_ADDRSTRLEN; | |
896 | } | |
897 | ||
3321e738 | 898 | if ((length - *offset) < addr_length + 2) |
16e87100 | 899 | return HV_E_FAIL; |
af733015 S |
900 | if (str == NULL) { |
901 | strcpy(buffer, "inet_ntop failed\n"); | |
16e87100 | 902 | return HV_E_FAIL; |
af733015 S |
903 | } |
904 | if (*offset == 0) | |
905 | strcpy(buffer, tmp); | |
3321e738 S |
906 | else { |
907 | strcat(buffer, ";"); | |
af733015 | 908 | strcat(buffer, tmp); |
3321e738 | 909 | } |
af733015 S |
910 | |
911 | *offset += strlen(str) + 1; | |
3321e738 | 912 | |
af733015 S |
913 | return 0; |
914 | } | |
915 | ||
cc04acf5 | 916 | static int |
4a3b97e5 | 917 | kvp_get_ip_info(int family, char *if_name, int op, |
0ecaa198 | 918 | void *out_buffer, int length) |
cc04acf5 KS |
919 | { |
920 | struct ifaddrs *ifap; | |
921 | struct ifaddrs *curp; | |
cc04acf5 | 922 | int offset = 0; |
04405784 | 923 | int sn_offset = 0; |
cc04acf5 | 924 | int error = 0; |
0ecaa198 S |
925 | char *buffer; |
926 | struct hv_kvp_ipaddr_value *ip_buffer; | |
6a60a6a8 S |
927 | char cidr_mask[5]; /* /xyz */ |
928 | int weight; | |
929 | int i; | |
930 | unsigned int *w; | |
931 | char *sn_str; | |
932 | struct sockaddr_in6 *addr6; | |
0ecaa198 S |
933 | |
934 | if (op == KVP_OP_ENUMERATE) { | |
935 | buffer = out_buffer; | |
936 | } else { | |
937 | ip_buffer = out_buffer; | |
938 | buffer = (char *)ip_buffer->ip_addr; | |
939 | ip_buffer->addr_family = 0; | |
940 | } | |
cc04acf5 KS |
941 | /* |
942 | * On entry into this function, the buffer is capable of holding the | |
0ecaa198 | 943 | * maximum key value. |
cc04acf5 KS |
944 | */ |
945 | ||
946 | if (getifaddrs(&ifap)) { | |
947 | strcpy(buffer, "getifaddrs failed\n"); | |
16e87100 | 948 | return HV_E_FAIL; |
cc04acf5 KS |
949 | } |
950 | ||
951 | curp = ifap; | |
952 | while (curp != NULL) { | |
0ecaa198 S |
953 | if (curp->ifa_addr == NULL) { |
954 | curp = curp->ifa_next; | |
955 | continue; | |
956 | } | |
cc04acf5 | 957 | |
0ecaa198 S |
958 | if ((if_name != NULL) && |
959 | (strncmp(curp->ifa_name, if_name, strlen(if_name)))) { | |
960 | /* | |
961 | * We want info about a specific interface; | |
962 | * just continue. | |
963 | */ | |
964 | curp = curp->ifa_next; | |
965 | continue; | |
966 | } | |
cc04acf5 | 967 | |
0ecaa198 S |
968 | /* |
969 | * We only support two address families: AF_INET and AF_INET6. | |
970 | * If a family value of 0 is specified, we collect both | |
971 | * supported address families; if not we gather info on | |
972 | * the specified address family. | |
973 | */ | |
3321e738 S |
974 | if ((((family != 0) && |
975 | (curp->ifa_addr->sa_family != family))) || | |
976 | (curp->ifa_flags & IFF_LOOPBACK)) { | |
0ecaa198 S |
977 | curp = curp->ifa_next; |
978 | continue; | |
979 | } | |
980 | if ((curp->ifa_addr->sa_family != AF_INET) && | |
981 | (curp->ifa_addr->sa_family != AF_INET6)) { | |
982 | curp = curp->ifa_next; | |
983 | continue; | |
984 | } | |
985 | ||
0d5b6b19 S |
986 | if (op == KVP_OP_GET_IP_INFO) { |
987 | /* | |
988 | * Gather info other than the IP address. | |
989 | * IP address info will be gathered later. | |
990 | */ | |
04405784 | 991 | if (curp->ifa_addr->sa_family == AF_INET) { |
0d5b6b19 | 992 | ip_buffer->addr_family |= ADDR_FAMILY_IPV4; |
04405784 S |
993 | /* |
994 | * Get subnet info. | |
995 | */ | |
996 | error = kvp_process_ip_address( | |
997 | curp->ifa_netmask, | |
998 | AF_INET, | |
999 | (char *) | |
1000 | ip_buffer->sub_net, | |
1001 | length, | |
1002 | &sn_offset); | |
1003 | if (error) | |
1004 | goto gather_ipaddr; | |
1005 | } else { | |
0d5b6b19 | 1006 | ip_buffer->addr_family |= ADDR_FAMILY_IPV6; |
6a60a6a8 | 1007 | |
04405784 | 1008 | /* |
6a60a6a8 | 1009 | * Get subnet info in CIDR format. |
04405784 | 1010 | */ |
6a60a6a8 S |
1011 | weight = 0; |
1012 | sn_str = (char *)ip_buffer->sub_net; | |
1013 | addr6 = (struct sockaddr_in6 *) | |
1014 | curp->ifa_netmask; | |
1015 | w = addr6->sin6_addr.s6_addr32; | |
1016 | ||
1017 | for (i = 0; i < 4; i++) | |
1018 | weight += hweight32(&w[i]); | |
1019 | ||
1020 | sprintf(cidr_mask, "/%d", weight); | |
1021 | if ((length - sn_offset) < | |
1022 | (strlen(cidr_mask) + 1)) | |
04405784 | 1023 | goto gather_ipaddr; |
6a60a6a8 S |
1024 | |
1025 | if (sn_offset == 0) | |
1026 | strcpy(sn_str, cidr_mask); | |
ed4bb974 S |
1027 | else { |
1028 | strcat((char *)ip_buffer->sub_net, ";"); | |
6a60a6a8 | 1029 | strcat(sn_str, cidr_mask); |
ed4bb974 | 1030 | } |
6a60a6a8 | 1031 | sn_offset += strlen(sn_str) + 1; |
04405784 | 1032 | } |
4a52c4af S |
1033 | |
1034 | /* | |
1035 | * Collect other ip related configuration info. | |
1036 | */ | |
1037 | ||
1038 | kvp_get_ipconfig_info(if_name, ip_buffer); | |
0d5b6b19 S |
1039 | } |
1040 | ||
04405784 | 1041 | gather_ipaddr: |
af733015 S |
1042 | error = kvp_process_ip_address(curp->ifa_addr, |
1043 | curp->ifa_addr->sa_family, | |
1044 | buffer, | |
1045 | length, &offset); | |
1046 | if (error) | |
1047 | goto getaddr_done; | |
0ecaa198 | 1048 | |
cc04acf5 KS |
1049 | curp = curp->ifa_next; |
1050 | } | |
1051 | ||
1052 | getaddr_done: | |
1053 | freeifaddrs(ifap); | |
1054 | return error; | |
1055 | } | |
1056 | ||
1057 | ||
32061b4d S |
1058 | static int expand_ipv6(char *addr, int type) |
1059 | { | |
1060 | int ret; | |
1061 | struct in6_addr v6_addr; | |
1062 | ||
1063 | ret = inet_pton(AF_INET6, addr, &v6_addr); | |
1064 | ||
1065 | if (ret != 1) { | |
1066 | if (type == NETMASK) | |
1067 | return 1; | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:" | |
1072 | "%02x%02x:%02x%02x:%02x%02x", | |
1073 | (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1], | |
1074 | (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3], | |
1075 | (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5], | |
1076 | (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7], | |
1077 | (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9], | |
1078 | (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11], | |
1079 | (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13], | |
1080 | (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]); | |
1081 | ||
1082 | return 1; | |
1083 | ||
1084 | } | |
1085 | ||
1086 | static int is_ipv4(char *addr) | |
1087 | { | |
1088 | int ret; | |
1089 | struct in_addr ipv4_addr; | |
1090 | ||
1091 | ret = inet_pton(AF_INET, addr, &ipv4_addr); | |
1092 | ||
1093 | if (ret == 1) | |
1094 | return 1; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static int parse_ip_val_buffer(char *in_buf, int *offset, | |
1099 | char *out_buf, int out_len) | |
1100 | { | |
1101 | char *x; | |
1102 | char *start; | |
1103 | ||
1104 | /* | |
1105 | * in_buf has sequence of characters that are seperated by | |
1106 | * the character ';'. The last sequence does not have the | |
1107 | * terminating ";" character. | |
1108 | */ | |
1109 | start = in_buf + *offset; | |
1110 | ||
1111 | x = strchr(start, ';'); | |
1112 | if (x) | |
1113 | *x = 0; | |
1114 | else | |
1115 | x = start + strlen(start); | |
1116 | ||
1117 | if (strlen(start) != 0) { | |
1118 | int i = 0; | |
1119 | /* | |
1120 | * Get rid of leading spaces. | |
1121 | */ | |
1122 | while (start[i] == ' ') | |
1123 | i++; | |
1124 | ||
1125 | if ((x - start) <= out_len) { | |
1126 | strcpy(out_buf, (start + i)); | |
1127 | *offset += (x - start) + 1; | |
1128 | return 1; | |
1129 | } | |
1130 | } | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3) | |
1135 | { | |
1136 | int ret; | |
1137 | ||
1138 | ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3); | |
1139 | ||
1140 | if (ret < 0) | |
1141 | return HV_E_FAIL; | |
1142 | ||
1143 | return 0; | |
1144 | } | |
1145 | ||
1146 | ||
1147 | static int process_ip_string(FILE *f, char *ip_string, int type) | |
1148 | { | |
1149 | int error = 0; | |
1150 | char addr[INET6_ADDRSTRLEN]; | |
1151 | int i = 0; | |
1152 | int j = 0; | |
1153 | char str[256]; | |
1154 | char sub_str[10]; | |
1155 | int offset = 0; | |
1156 | ||
1157 | memset(addr, 0, sizeof(addr)); | |
1158 | ||
1159 | while (parse_ip_val_buffer(ip_string, &offset, addr, | |
1160 | (MAX_IP_ADDR_SIZE * 2))) { | |
1161 | ||
1162 | sub_str[0] = 0; | |
1163 | if (is_ipv4(addr)) { | |
1164 | switch (type) { | |
1165 | case IPADDR: | |
1166 | snprintf(str, sizeof(str), "%s", "IPADDR"); | |
1167 | break; | |
1168 | case NETMASK: | |
1169 | snprintf(str, sizeof(str), "%s", "NETMASK"); | |
1170 | break; | |
1171 | case GATEWAY: | |
1172 | snprintf(str, sizeof(str), "%s", "GATEWAY"); | |
1173 | break; | |
1174 | case DNS: | |
1175 | snprintf(str, sizeof(str), "%s", "DNS"); | |
1176 | break; | |
1177 | } | |
0783d72f TH |
1178 | |
1179 | if (type == DNS) { | |
32061b4d | 1180 | snprintf(sub_str, sizeof(sub_str), "%d", ++i); |
0783d72f TH |
1181 | } else if (type == GATEWAY && i == 0) { |
1182 | ++i; | |
1183 | } else { | |
1184 | snprintf(sub_str, sizeof(sub_str), "%d", i++); | |
32061b4d S |
1185 | } |
1186 | ||
1187 | ||
1188 | } else if (expand_ipv6(addr, type)) { | |
1189 | switch (type) { | |
1190 | case IPADDR: | |
1191 | snprintf(str, sizeof(str), "%s", "IPV6ADDR"); | |
1192 | break; | |
1193 | case NETMASK: | |
1194 | snprintf(str, sizeof(str), "%s", "IPV6NETMASK"); | |
1195 | break; | |
1196 | case GATEWAY: | |
1197 | snprintf(str, sizeof(str), "%s", | |
1198 | "IPV6_DEFAULTGW"); | |
1199 | break; | |
1200 | case DNS: | |
1201 | snprintf(str, sizeof(str), "%s", "DNS"); | |
1202 | break; | |
1203 | } | |
0783d72f TH |
1204 | |
1205 | if (type == DNS) { | |
1206 | snprintf(sub_str, sizeof(sub_str), "%d", ++i); | |
1207 | } else if (j == 0) { | |
1208 | ++j; | |
1209 | } else { | |
1210 | snprintf(sub_str, sizeof(sub_str), "_%d", j++); | |
32061b4d S |
1211 | } |
1212 | } else { | |
1213 | return HV_INVALIDARG; | |
1214 | } | |
1215 | ||
1216 | error = kvp_write_file(f, str, sub_str, addr); | |
1217 | if (error) | |
1218 | return error; | |
1219 | memset(addr, 0, sizeof(addr)); | |
1220 | } | |
1221 | ||
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) | |
1226 | { | |
1227 | int error = 0; | |
1228 | char if_file[128]; | |
1229 | FILE *file; | |
1230 | char cmd[512]; | |
1231 | char *mac_addr; | |
1232 | ||
1233 | /* | |
1234 | * Set the configuration for the specified interface with | |
1235 | * the information provided. Since there is no standard | |
1236 | * way to configure an interface, we will have an external | |
1237 | * script that does the job of configuring the interface and | |
1238 | * flushing the configuration. | |
1239 | * | |
1240 | * The parameters passed to this external script are: | |
1241 | * 1. A configuration file that has the specified configuration. | |
1242 | * | |
1243 | * We will embed the name of the interface in the configuration | |
1244 | * file: ifcfg-ethx (where ethx is the interface name). | |
1245 | * | |
1246 | * The information provided here may be more than what is needed | |
1247 | * in a given distro to configure the interface and so are free | |
1248 | * ignore information that may not be relevant. | |
1249 | * | |
1250 | * Here is the format of the ip configuration file: | |
1251 | * | |
1252 | * HWADDR=macaddr | |
0783d72f TH |
1253 | * DEVICE=interface name |
1254 | * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured | |
1255 | * or "none" if no boot-time protocol should be used) | |
32061b4d | 1256 | * |
0783d72f TH |
1257 | * IPADDR0=ipaddr1 |
1258 | * IPADDR1=ipaddr2 | |
1259 | * IPADDRx=ipaddry (where y = x + 1) | |
32061b4d | 1260 | * |
0783d72f TH |
1261 | * NETMASK0=netmask1 |
1262 | * NETMASKx=netmasky (where y = x + 1) | |
32061b4d S |
1263 | * |
1264 | * GATEWAY=ipaddr1 | |
0783d72f | 1265 | * GATEWAYx=ipaddry (where y = x + 1) |
32061b4d S |
1266 | * |
1267 | * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc) | |
1268 | * | |
1269 | * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be | |
1270 | * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as | |
1271 | * IPV6NETMASK. | |
1272 | * | |
1273 | * The host can specify multiple ipv4 and ipv6 addresses to be | |
1274 | * configured for the interface. Furthermore, the configuration | |
1275 | * needs to be persistent. A subsequent GET call on the interface | |
1276 | * is expected to return the configuration that is set via the SET | |
1277 | * call. | |
1278 | */ | |
1279 | ||
1280 | snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC, | |
40424f5f | 1281 | "/ifcfg-", if_name); |
32061b4d S |
1282 | |
1283 | file = fopen(if_file, "w"); | |
1284 | ||
1285 | if (file == NULL) { | |
12e50c30 TH |
1286 | syslog(LOG_ERR, "Failed to open config file; error: %d %s", |
1287 | errno, strerror(errno)); | |
32061b4d S |
1288 | return HV_E_FAIL; |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * First write out the MAC address. | |
1293 | */ | |
1294 | ||
1295 | mac_addr = kvp_if_name_to_mac(if_name); | |
1296 | if (mac_addr == NULL) { | |
1297 | error = HV_E_FAIL; | |
1298 | goto setval_error; | |
1299 | } | |
1300 | ||
1301 | error = kvp_write_file(file, "HWADDR", "", mac_addr); | |
57969af0 | 1302 | free(mac_addr); |
32061b4d S |
1303 | if (error) |
1304 | goto setval_error; | |
1305 | ||
0783d72f | 1306 | error = kvp_write_file(file, "DEVICE", "", if_name); |
32061b4d S |
1307 | if (error) |
1308 | goto setval_error; | |
1309 | ||
1310 | if (new_val->dhcp_enabled) { | |
0783d72f | 1311 | error = kvp_write_file(file, "BOOTPROTO", "", "dhcp"); |
32061b4d S |
1312 | if (error) |
1313 | goto setval_error; | |
1314 | ||
1315 | /* | |
1316 | * We are done!. | |
1317 | */ | |
1318 | goto setval_done; | |
0783d72f TH |
1319 | |
1320 | } else { | |
1321 | error = kvp_write_file(file, "BOOTPROTO", "", "none"); | |
1322 | if (error) | |
1323 | goto setval_error; | |
32061b4d S |
1324 | } |
1325 | ||
1326 | /* | |
1327 | * Write the configuration for ipaddress, netmask, gateway and | |
1328 | * name servers. | |
1329 | */ | |
1330 | ||
1331 | error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR); | |
1332 | if (error) | |
1333 | goto setval_error; | |
1334 | ||
1335 | error = process_ip_string(file, (char *)new_val->sub_net, NETMASK); | |
1336 | if (error) | |
1337 | goto setval_error; | |
1338 | ||
1339 | error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY); | |
1340 | if (error) | |
1341 | goto setval_error; | |
1342 | ||
1343 | error = process_ip_string(file, (char *)new_val->dns_addr, DNS); | |
1344 | if (error) | |
1345 | goto setval_error; | |
1346 | ||
1347 | setval_done: | |
32061b4d S |
1348 | fclose(file); |
1349 | ||
1350 | /* | |
1351 | * Now that we have populated the configuration file, | |
1352 | * invoke the external script to do its magic. | |
1353 | */ | |
1354 | ||
1355 | snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file); | |
d3b688c6 OH |
1356 | if (system(cmd)) { |
1357 | syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s", | |
1358 | cmd, errno, strerror(errno)); | |
1359 | return HV_E_FAIL; | |
1360 | } | |
32061b4d S |
1361 | return 0; |
1362 | ||
1363 | setval_error: | |
1364 | syslog(LOG_ERR, "Failed to write config file"); | |
32061b4d S |
1365 | fclose(file); |
1366 | return error; | |
1367 | } | |
1368 | ||
1369 | ||
58125210 | 1370 | static void |
cc04acf5 KS |
1371 | kvp_get_domain_name(char *buffer, int length) |
1372 | { | |
1373 | struct addrinfo hints, *info ; | |
cc04acf5 KS |
1374 | int error = 0; |
1375 | ||
5be528c2 | 1376 | gethostname(buffer, length); |
cc04acf5 KS |
1377 | memset(&hints, 0, sizeof(hints)); |
1378 | hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */ | |
1379 | hints.ai_socktype = SOCK_STREAM; | |
1380 | hints.ai_flags = AI_CANONNAME; | |
1381 | ||
5be528c2 | 1382 | error = getaddrinfo(buffer, NULL, &hints, &info); |
cc04acf5 | 1383 | if (error != 0) { |
58125210 OH |
1384 | snprintf(buffer, length, "getaddrinfo failed: 0x%x %s", |
1385 | error, gai_strerror(error)); | |
1386 | return; | |
cc04acf5 | 1387 | } |
58125210 | 1388 | snprintf(buffer, length, "%s", info->ai_canonname); |
cc04acf5 | 1389 | freeaddrinfo(info); |
cc04acf5 KS |
1390 | } |
1391 | ||
1392 | static int | |
1393 | netlink_send(int fd, struct cn_msg *msg) | |
1394 | { | |
b4fb0ca2 | 1395 | struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE }; |
cc04acf5 KS |
1396 | unsigned int size; |
1397 | struct msghdr message; | |
cc04acf5 KS |
1398 | struct iovec iov[2]; |
1399 | ||
2bc41ea3 | 1400 | size = sizeof(struct cn_msg) + msg->len; |
cc04acf5 | 1401 | |
b4fb0ca2 OH |
1402 | nlh.nlmsg_pid = getpid(); |
1403 | nlh.nlmsg_len = NLMSG_LENGTH(size); | |
cc04acf5 | 1404 | |
b4fb0ca2 OH |
1405 | iov[0].iov_base = &nlh; |
1406 | iov[0].iov_len = sizeof(nlh); | |
cc04acf5 KS |
1407 | |
1408 | iov[1].iov_base = msg; | |
1409 | iov[1].iov_len = size; | |
1410 | ||
1411 | memset(&message, 0, sizeof(message)); | |
1412 | message.msg_name = &addr; | |
1413 | message.msg_namelen = sizeof(addr); | |
1414 | message.msg_iov = iov; | |
1415 | message.msg_iovlen = 2; | |
1416 | ||
1417 | return sendmsg(fd, &message, 0); | |
1418 | } | |
1419 | ||
7989f7d5 | 1420 | int main(void) |
cc04acf5 | 1421 | { |
f4685fa6 | 1422 | int fd, len, nl_group; |
cc04acf5 KS |
1423 | int error; |
1424 | struct cn_msg *message; | |
1425 | struct pollfd pfd; | |
1426 | struct nlmsghdr *incoming_msg; | |
1427 | struct cn_msg *incoming_cn_msg; | |
26403354 | 1428 | struct hv_kvp_msg *hv_msg; |
7989f7d5 | 1429 | char *p; |
cc04acf5 KS |
1430 | char *key_value; |
1431 | char *key_name; | |
b47a81dc S |
1432 | int op; |
1433 | int pool; | |
32061b4d S |
1434 | char *if_name; |
1435 | struct hv_kvp_ipaddr_value *kvp_ip_val; | |
b4919a5f OH |
1436 | char *kvp_recv_buffer; |
1437 | size_t kvp_recv_buffer_len; | |
cc04acf5 | 1438 | |
00663d73 OH |
1439 | if (daemon(1, 0)) |
1440 | return 1; | |
cc04acf5 KS |
1441 | openlog("KVP", 0, LOG_USER); |
1442 | syslog(LOG_INFO, "KVP starting; pid is:%d", getpid()); | |
b4919a5f | 1443 | |
269ce62b | 1444 | kvp_recv_buffer_len = NLMSG_LENGTH(0) + sizeof(struct cn_msg) + sizeof(struct hv_kvp_msg); |
b4919a5f | 1445 | kvp_recv_buffer = calloc(1, kvp_recv_buffer_len); |
269ce62b OH |
1446 | if (!kvp_recv_buffer) { |
1447 | syslog(LOG_ERR, "Failed to allocate netlink buffer"); | |
b4919a5f OH |
1448 | exit(EXIT_FAILURE); |
1449 | } | |
cc04acf5 KS |
1450 | /* |
1451 | * Retrieve OS release information. | |
1452 | */ | |
1453 | kvp_get_os_info(); | |
58125210 OH |
1454 | /* |
1455 | * Cache Fully Qualified Domain Name because getaddrinfo takes an | |
1456 | * unpredictable amount of time to finish. | |
1457 | */ | |
1458 | kvp_get_domain_name(full_domain_name, sizeof(full_domain_name)); | |
cc04acf5 | 1459 | |
db425334 S |
1460 | if (kvp_file_init()) { |
1461 | syslog(LOG_ERR, "Failed to initialize the pools"); | |
6bb22fea | 1462 | exit(EXIT_FAILURE); |
db425334 S |
1463 | } |
1464 | ||
cc04acf5 KS |
1465 | fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); |
1466 | if (fd < 0) { | |
12e50c30 TH |
1467 | syslog(LOG_ERR, "netlink socket creation failed; error: %d %s", errno, |
1468 | strerror(errno)); | |
6bb22fea | 1469 | exit(EXIT_FAILURE); |
cc04acf5 KS |
1470 | } |
1471 | addr.nl_family = AF_NETLINK; | |
1472 | addr.nl_pad = 0; | |
1473 | addr.nl_pid = 0; | |
77d6a528 | 1474 | addr.nl_groups = 0; |
cc04acf5 KS |
1475 | |
1476 | ||
1477 | error = bind(fd, (struct sockaddr *)&addr, sizeof(addr)); | |
1478 | if (error < 0) { | |
12e50c30 | 1479 | syslog(LOG_ERR, "bind failed; error: %d %s", errno, strerror(errno)); |
cc04acf5 | 1480 | close(fd); |
6bb22fea | 1481 | exit(EXIT_FAILURE); |
cc04acf5 | 1482 | } |
f4685fa6 | 1483 | nl_group = CN_KVP_IDX; |
35901603 TH |
1484 | |
1485 | if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) { | |
1486 | syslog(LOG_ERR, "setsockopt failed; error: %d %s", errno, strerror(errno)); | |
1487 | close(fd); | |
1488 | exit(EXIT_FAILURE); | |
1489 | } | |
1490 | ||
cc04acf5 KS |
1491 | /* |
1492 | * Register ourselves with the kernel. | |
1493 | */ | |
269ce62b | 1494 | message = (struct cn_msg *)kvp_recv_buffer; |
cc04acf5 KS |
1495 | message->id.idx = CN_KVP_IDX; |
1496 | message->id.val = CN_KVP_VAL; | |
26403354 S |
1497 | |
1498 | hv_msg = (struct hv_kvp_msg *)message->data; | |
b47a81dc | 1499 | hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1; |
cc04acf5 | 1500 | message->ack = 0; |
26403354 | 1501 | message->len = sizeof(struct hv_kvp_msg); |
cc04acf5 KS |
1502 | |
1503 | len = netlink_send(fd, message); | |
1504 | if (len < 0) { | |
12e50c30 | 1505 | syslog(LOG_ERR, "netlink_send failed; error: %d %s", errno, strerror(errno)); |
cc04acf5 | 1506 | close(fd); |
6bb22fea | 1507 | exit(EXIT_FAILURE); |
cc04acf5 KS |
1508 | } |
1509 | ||
1510 | pfd.fd = fd; | |
1511 | ||
1512 | while (1) { | |
bcc2c9c3 OH |
1513 | struct sockaddr *addr_p = (struct sockaddr *) &addr; |
1514 | socklen_t addr_l = sizeof(addr); | |
cc04acf5 KS |
1515 | pfd.events = POLLIN; |
1516 | pfd.revents = 0; | |
4d81e307 TH |
1517 | |
1518 | if (poll(&pfd, 1, -1) < 0) { | |
1519 | syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno)); | |
1520 | if (errno == EINVAL) { | |
1521 | close(fd); | |
1522 | exit(EXIT_FAILURE); | |
1523 | } | |
1524 | else | |
1525 | continue; | |
1526 | } | |
cc04acf5 | 1527 | |
b4919a5f | 1528 | len = recvfrom(fd, kvp_recv_buffer, kvp_recv_buffer_len, 0, |
bcc2c9c3 | 1529 | addr_p, &addr_l); |
cc04acf5 | 1530 | |
95a69ada | 1531 | if (len < 0) { |
bcc2c9c3 OH |
1532 | syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s", |
1533 | addr.nl_pid, errno, strerror(errno)); | |
cc04acf5 KS |
1534 | close(fd); |
1535 | return -1; | |
1536 | } | |
1537 | ||
95a69ada TH |
1538 | if (addr.nl_pid) { |
1539 | syslog(LOG_WARNING, "Received packet from untrusted pid:%u", | |
1540 | addr.nl_pid); | |
1541 | continue; | |
1542 | } | |
1543 | ||
cc04acf5 | 1544 | incoming_msg = (struct nlmsghdr *)kvp_recv_buffer; |
75db6014 TH |
1545 | |
1546 | if (incoming_msg->nlmsg_type != NLMSG_DONE) | |
1547 | continue; | |
1548 | ||
cc04acf5 | 1549 | incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg); |
26403354 | 1550 | hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data; |
cc04acf5 | 1551 | |
b47a81dc S |
1552 | /* |
1553 | * We will use the KVP header information to pass back | |
1554 | * the error from this daemon. So, first copy the state | |
1555 | * and set the error code to success. | |
1556 | */ | |
1557 | op = hv_msg->kvp_hdr.operation; | |
1558 | pool = hv_msg->kvp_hdr.pool; | |
1559 | hv_msg->error = HV_S_OK; | |
1560 | ||
1561 | if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) { | |
cc04acf5 KS |
1562 | /* |
1563 | * Driver is registering with us; stash away the version | |
1564 | * information. | |
1565 | */ | |
b47a81dc | 1566 | in_hand_shake = 0; |
e485ceac | 1567 | p = (char *)hv_msg->body.kvp_register.version; |
7989f7d5 | 1568 | lic_version = malloc(strlen(p) + 1); |
cc04acf5 | 1569 | if (lic_version) { |
7989f7d5 | 1570 | strcpy(lic_version, p); |
cc04acf5 KS |
1571 | syslog(LOG_INFO, "KVP LIC Version: %s", |
1572 | lic_version); | |
1573 | } else { | |
1574 | syslog(LOG_ERR, "malloc failed"); | |
1575 | } | |
1576 | continue; | |
b47a81dc | 1577 | } |
cc04acf5 | 1578 | |
b47a81dc | 1579 | switch (op) { |
16e87100 S |
1580 | case KVP_OP_GET_IP_INFO: |
1581 | kvp_ip_val = &hv_msg->body.kvp_ip_val; | |
1582 | if_name = | |
1583 | kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id); | |
1584 | ||
1585 | if (if_name == NULL) { | |
1586 | /* | |
1587 | * We could not map the mac address to an | |
1588 | * interface name; return error. | |
1589 | */ | |
1590 | hv_msg->error = HV_E_FAIL; | |
1591 | break; | |
1592 | } | |
1593 | error = kvp_get_ip_info( | |
1594 | 0, if_name, KVP_OP_GET_IP_INFO, | |
1595 | kvp_ip_val, | |
1596 | (MAX_IP_ADDR_SIZE * 2)); | |
1597 | ||
1598 | if (error) | |
1599 | hv_msg->error = error; | |
1600 | ||
1601 | free(if_name); | |
1602 | break; | |
1603 | ||
32061b4d S |
1604 | case KVP_OP_SET_IP_INFO: |
1605 | kvp_ip_val = &hv_msg->body.kvp_ip_val; | |
1606 | if_name = kvp_get_if_name( | |
1607 | (char *)kvp_ip_val->adapter_id); | |
1608 | if (if_name == NULL) { | |
1609 | /* | |
1610 | * We could not map the guid to an | |
1611 | * interface name; return error. | |
1612 | */ | |
1613 | hv_msg->error = HV_GUID_NOTFOUND; | |
1614 | break; | |
1615 | } | |
1616 | error = kvp_set_ip_info(if_name, kvp_ip_val); | |
1617 | if (error) | |
1618 | hv_msg->error = error; | |
1619 | ||
1620 | free(if_name); | |
1621 | break; | |
1622 | ||
fa3d5b85 | 1623 | case KVP_OP_SET: |
b47a81dc | 1624 | if (kvp_key_add_or_modify(pool, |
db425334 S |
1625 | hv_msg->body.kvp_set.data.key, |
1626 | hv_msg->body.kvp_set.data.key_size, | |
1627 | hv_msg->body.kvp_set.data.value, | |
1628 | hv_msg->body.kvp_set.data.value_size)) | |
b47a81dc | 1629 | hv_msg->error = HV_S_CONT; |
db425334 S |
1630 | break; |
1631 | ||
fa3d5b85 | 1632 | case KVP_OP_GET: |
b47a81dc | 1633 | if (kvp_get_value(pool, |
db425334 S |
1634 | hv_msg->body.kvp_set.data.key, |
1635 | hv_msg->body.kvp_set.data.key_size, | |
1636 | hv_msg->body.kvp_set.data.value, | |
1637 | hv_msg->body.kvp_set.data.value_size)) | |
b47a81dc | 1638 | hv_msg->error = HV_S_CONT; |
db425334 S |
1639 | break; |
1640 | ||
fa3d5b85 | 1641 | case KVP_OP_DELETE: |
b47a81dc | 1642 | if (kvp_key_delete(pool, |
db425334 S |
1643 | hv_msg->body.kvp_delete.key, |
1644 | hv_msg->body.kvp_delete.key_size)) | |
b47a81dc | 1645 | hv_msg->error = HV_S_CONT; |
db425334 S |
1646 | break; |
1647 | ||
cc04acf5 | 1648 | default: |
26403354 | 1649 | break; |
cc04acf5 KS |
1650 | } |
1651 | ||
b47a81dc | 1652 | if (op != KVP_OP_ENUMERATE) |
fa3d5b85 S |
1653 | goto kvp_done; |
1654 | ||
adc80ae6 S |
1655 | /* |
1656 | * If the pool is KVP_POOL_AUTO, dynamically generate | |
1657 | * both the key and the value; if not read from the | |
1658 | * appropriate pool. | |
1659 | */ | |
b47a81dc S |
1660 | if (pool != KVP_POOL_AUTO) { |
1661 | if (kvp_pool_enumerate(pool, | |
adc80ae6 S |
1662 | hv_msg->body.kvp_enum_data.index, |
1663 | hv_msg->body.kvp_enum_data.data.key, | |
1664 | HV_KVP_EXCHANGE_MAX_KEY_SIZE, | |
1665 | hv_msg->body.kvp_enum_data.data.value, | |
b47a81dc S |
1666 | HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) |
1667 | hv_msg->error = HV_S_CONT; | |
adc80ae6 S |
1668 | goto kvp_done; |
1669 | } | |
1670 | ||
26403354 S |
1671 | hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data; |
1672 | key_name = (char *)hv_msg->body.kvp_enum_data.data.key; | |
1673 | key_value = (char *)hv_msg->body.kvp_enum_data.data.value; | |
cc04acf5 | 1674 | |
26403354 | 1675 | switch (hv_msg->body.kvp_enum_data.index) { |
cc04acf5 | 1676 | case FullyQualifiedDomainName: |
58125210 | 1677 | strcpy(key_value, full_domain_name); |
cc04acf5 KS |
1678 | strcpy(key_name, "FullyQualifiedDomainName"); |
1679 | break; | |
1680 | case IntegrationServicesVersion: | |
1681 | strcpy(key_name, "IntegrationServicesVersion"); | |
1682 | strcpy(key_value, lic_version); | |
1683 | break; | |
1684 | case NetworkAddressIPv4: | |
4a3b97e5 | 1685 | kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE, |
0ecaa198 | 1686 | key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); |
cc04acf5 KS |
1687 | strcpy(key_name, "NetworkAddressIPv4"); |
1688 | break; | |
1689 | case NetworkAddressIPv6: | |
4a3b97e5 | 1690 | kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE, |
0ecaa198 | 1691 | key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); |
cc04acf5 KS |
1692 | strcpy(key_name, "NetworkAddressIPv6"); |
1693 | break; | |
1694 | case OSBuildNumber: | |
1695 | strcpy(key_value, os_build); | |
1696 | strcpy(key_name, "OSBuildNumber"); | |
1697 | break; | |
1698 | case OSName: | |
1699 | strcpy(key_value, os_name); | |
1700 | strcpy(key_name, "OSName"); | |
1701 | break; | |
1702 | case OSMajorVersion: | |
1703 | strcpy(key_value, os_major); | |
1704 | strcpy(key_name, "OSMajorVersion"); | |
1705 | break; | |
1706 | case OSMinorVersion: | |
1707 | strcpy(key_value, os_minor); | |
1708 | strcpy(key_name, "OSMinorVersion"); | |
1709 | break; | |
1710 | case OSVersion: | |
f426a36c | 1711 | strcpy(key_value, os_version); |
cc04acf5 KS |
1712 | strcpy(key_name, "OSVersion"); |
1713 | break; | |
1714 | case ProcessorArchitecture: | |
1715 | strcpy(key_value, processor_arch); | |
1716 | strcpy(key_name, "ProcessorArchitecture"); | |
1717 | break; | |
1718 | default: | |
b47a81dc | 1719 | hv_msg->error = HV_S_CONT; |
cc04acf5 KS |
1720 | break; |
1721 | } | |
1722 | /* | |
1723 | * Send the value back to the kernel. The response is | |
1724 | * already in the receive buffer. Update the cn_msg header to | |
1725 | * reflect the key value that has been added to the message | |
1726 | */ | |
fa3d5b85 | 1727 | kvp_done: |
cc04acf5 KS |
1728 | |
1729 | incoming_cn_msg->id.idx = CN_KVP_IDX; | |
1730 | incoming_cn_msg->id.val = CN_KVP_VAL; | |
cc04acf5 | 1731 | incoming_cn_msg->ack = 0; |
26403354 | 1732 | incoming_cn_msg->len = sizeof(struct hv_kvp_msg); |
cc04acf5 KS |
1733 | |
1734 | len = netlink_send(fd, incoming_cn_msg); | |
1735 | if (len < 0) { | |
12e50c30 TH |
1736 | syslog(LOG_ERR, "net_link send failed; error: %d %s", errno, |
1737 | strerror(errno)); | |
6bb22fea | 1738 | exit(EXIT_FAILURE); |
cc04acf5 KS |
1739 | } |
1740 | } | |
1741 | ||
1742 | } |