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> | |
29 | #include <linux/types.h> | |
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <unistd.h> | |
33 | #include <string.h> | |
32061b4d | 34 | #include <ctype.h> |
cc04acf5 KS |
35 | #include <errno.h> |
36 | #include <arpa/inet.h> | |
37 | #include <linux/connector.h> | |
eab6af71 | 38 | #include <linux/hyperv.h> |
cc04acf5 | 39 | #include <linux/netlink.h> |
cc04acf5 KS |
40 | #include <ifaddrs.h> |
41 | #include <netdb.h> | |
42 | #include <syslog.h> | |
db425334 S |
43 | #include <sys/stat.h> |
44 | #include <fcntl.h> | |
32061b4d | 45 | #include <dirent.h> |
3321e738 | 46 | #include <net/if.h> |
cc04acf5 KS |
47 | |
48 | /* | |
49 | * KVP protocol: The user mode component first registers with the | |
50 | * the kernel component. Subsequently, the kernel component requests, data | |
51 | * for the specified keys. In response to this message the user mode component | |
52 | * fills in the value corresponding to the specified key. We overload the | |
53 | * sequence field in the cn_msg header to define our KVP message types. | |
54 | * | |
55 | * We use this infrastructure for also supporting queries from user mode | |
56 | * application for state that may be maintained in the KVP kernel component. | |
57 | * | |
cc04acf5 KS |
58 | */ |
59 | ||
cc04acf5 KS |
60 | |
61 | enum key_index { | |
62 | FullyQualifiedDomainName = 0, | |
63 | IntegrationServicesVersion, /*This key is serviced in the kernel*/ | |
64 | NetworkAddressIPv4, | |
65 | NetworkAddressIPv6, | |
66 | OSBuildNumber, | |
67 | OSName, | |
68 | OSMajorVersion, | |
69 | OSMinorVersion, | |
70 | OSVersion, | |
71 | ProcessorArchitecture | |
72 | }; | |
73 | ||
32061b4d S |
74 | |
75 | enum { | |
76 | IPADDR = 0, | |
77 | NETMASK, | |
78 | GATEWAY, | |
79 | DNS | |
80 | }; | |
81 | ||
cc04acf5 | 82 | static struct sockaddr_nl addr; |
b47a81dc | 83 | static int in_hand_shake = 1; |
cc04acf5 | 84 | |
7989f7d5 OH |
85 | static char *os_name = ""; |
86 | static char *os_major = ""; | |
87 | static char *os_minor = ""; | |
88 | static char *processor_arch; | |
89 | static char *os_build; | |
f426a36c | 90 | static char *os_version; |
b47a81dc | 91 | static char *lic_version = "Unknown version"; |
58125210 | 92 | static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; |
7989f7d5 | 93 | static struct utsname uts_buf; |
cc04acf5 | 94 | |
32061b4d S |
95 | /* |
96 | * The location of the interface configuration file. | |
97 | */ | |
98 | ||
40424f5f | 99 | #define KVP_CONFIG_LOC "/var/lib/hyperv" |
db425334 S |
100 | |
101 | #define MAX_FILE_NAME 100 | |
102 | #define ENTRIES_PER_BLOCK 50 | |
103 | ||
f4685fa6 TH |
104 | #ifndef SOL_NETLINK |
105 | #define SOL_NETLINK 270 | |
106 | #endif | |
107 | ||
db425334 | 108 | struct kvp_record { |
d0cbc156 S |
109 | char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; |
110 | char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; | |
db425334 S |
111 | }; |
112 | ||
113 | struct kvp_file_state { | |
114 | int fd; | |
115 | int num_blocks; | |
116 | struct kvp_record *records; | |
117 | int num_records; | |
d0cbc156 | 118 | char fname[MAX_FILE_NAME]; |
db425334 S |
119 | }; |
120 | ||
121 | static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT]; | |
122 | ||
123 | static void kvp_acquire_lock(int pool) | |
124 | { | |
125 | struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0}; | |
126 | fl.l_pid = getpid(); | |
127 | ||
128 | if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) { | |
12e50c30 TH |
129 | syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool, |
130 | errno, strerror(errno)); | |
6bb22fea | 131 | exit(EXIT_FAILURE); |
db425334 S |
132 | } |
133 | } | |
134 | ||
135 | static void kvp_release_lock(int pool) | |
136 | { | |
137 | struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0}; | |
138 | fl.l_pid = getpid(); | |
139 | ||
140 | if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) { | |
12e50c30 TH |
141 | syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool, |
142 | errno, strerror(errno)); | |
6bb22fea | 143 | exit(EXIT_FAILURE); |
db425334 S |
144 | } |
145 | } | |
146 | ||
147 | static void kvp_update_file(int pool) | |
148 | { | |
149 | FILE *filep; | |
150 | size_t bytes_written; | |
151 | ||
152 | /* | |
153 | * We are going to write our in-memory registry out to | |
154 | * disk; acquire the lock first. | |
155 | */ | |
156 | kvp_acquire_lock(pool); | |
157 | ||
8467fdbb | 158 | filep = fopen(kvp_file_info[pool].fname, "we"); |
db425334 | 159 | if (!filep) { |
12e50c30 TH |
160 | syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, |
161 | errno, strerror(errno)); | |
db425334 | 162 | kvp_release_lock(pool); |
6bb22fea | 163 | exit(EXIT_FAILURE); |
db425334 S |
164 | } |
165 | ||
166 | bytes_written = fwrite(kvp_file_info[pool].records, | |
167 | sizeof(struct kvp_record), | |
168 | kvp_file_info[pool].num_records, filep); | |
169 | ||
436473bc BH |
170 | if (ferror(filep) || fclose(filep)) { |
171 | kvp_release_lock(pool); | |
172 | syslog(LOG_ERR, "Failed to write file, pool: %d", pool); | |
173 | exit(EXIT_FAILURE); | |
174 | } | |
175 | ||
db425334 S |
176 | kvp_release_lock(pool); |
177 | } | |
178 | ||
adc80ae6 S |
179 | static void kvp_update_mem_state(int pool) |
180 | { | |
181 | FILE *filep; | |
182 | size_t records_read = 0; | |
183 | struct kvp_record *record = kvp_file_info[pool].records; | |
184 | struct kvp_record *readp; | |
185 | int num_blocks = kvp_file_info[pool].num_blocks; | |
186 | int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; | |
187 | ||
188 | kvp_acquire_lock(pool); | |
189 | ||
8467fdbb | 190 | filep = fopen(kvp_file_info[pool].fname, "re"); |
adc80ae6 | 191 | if (!filep) { |
12e50c30 TH |
192 | syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, |
193 | errno, strerror(errno)); | |
adc80ae6 | 194 | kvp_release_lock(pool); |
6bb22fea | 195 | exit(EXIT_FAILURE); |
adc80ae6 | 196 | } |
436473bc | 197 | for (;;) { |
adc80ae6 S |
198 | readp = &record[records_read]; |
199 | records_read += fread(readp, sizeof(struct kvp_record), | |
200 | ENTRIES_PER_BLOCK * num_blocks, | |
201 | filep); | |
202 | ||
436473bc BH |
203 | if (ferror(filep)) { |
204 | syslog(LOG_ERR, "Failed to read file, pool: %d", pool); | |
205 | exit(EXIT_FAILURE); | |
206 | } | |
207 | ||
adc80ae6 S |
208 | if (!feof(filep)) { |
209 | /* | |
210 | * We have more data to read. | |
211 | */ | |
212 | num_blocks++; | |
213 | record = realloc(record, alloc_unit * num_blocks); | |
214 | ||
215 | if (record == NULL) { | |
216 | syslog(LOG_ERR, "malloc failed"); | |
6bb22fea | 217 | exit(EXIT_FAILURE); |
adc80ae6 S |
218 | } |
219 | continue; | |
220 | } | |
221 | break; | |
222 | } | |
223 | ||
224 | kvp_file_info[pool].num_blocks = num_blocks; | |
225 | kvp_file_info[pool].records = record; | |
226 | kvp_file_info[pool].num_records = records_read; | |
227 | ||
d5ab4827 | 228 | fclose(filep); |
adc80ae6 S |
229 | kvp_release_lock(pool); |
230 | } | |
db425334 S |
231 | static int kvp_file_init(void) |
232 | { | |
00b83355 | 233 | int fd; |
db425334 S |
234 | FILE *filep; |
235 | size_t records_read; | |
d0cbc156 | 236 | char *fname; |
db425334 S |
237 | struct kvp_record *record; |
238 | struct kvp_record *readp; | |
239 | int num_blocks; | |
240 | int i; | |
241 | int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; | |
242 | ||
40424f5f | 243 | if (access(KVP_CONFIG_LOC, F_OK)) { |
0bffd25c | 244 | if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) { |
12e50c30 TH |
245 | syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC, |
246 | errno, strerror(errno)); | |
6bb22fea | 247 | exit(EXIT_FAILURE); |
db425334 S |
248 | } |
249 | } | |
250 | ||
251 | for (i = 0; i < KVP_POOL_COUNT; i++) { | |
252 | fname = kvp_file_info[i].fname; | |
253 | records_read = 0; | |
254 | num_blocks = 1; | |
40424f5f | 255 | sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i); |
8467fdbb | 256 | fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */); |
db425334 S |
257 | |
258 | if (fd == -1) | |
259 | return 1; | |
260 | ||
261 | ||
8467fdbb | 262 | filep = fopen(fname, "re"); |
fca59755 TH |
263 | if (!filep) { |
264 | close(fd); | |
db425334 | 265 | return 1; |
fca59755 | 266 | } |
db425334 S |
267 | |
268 | record = malloc(alloc_unit * num_blocks); | |
269 | if (record == NULL) { | |
270 | fclose(filep); | |
fca59755 | 271 | close(fd); |
db425334 S |
272 | return 1; |
273 | } | |
436473bc | 274 | for (;;) { |
db425334 S |
275 | readp = &record[records_read]; |
276 | records_read += fread(readp, sizeof(struct kvp_record), | |
277 | ENTRIES_PER_BLOCK, | |
278 | filep); | |
279 | ||
436473bc BH |
280 | if (ferror(filep)) { |
281 | syslog(LOG_ERR, "Failed to read file, pool: %d", | |
282 | i); | |
283 | exit(EXIT_FAILURE); | |
284 | } | |
285 | ||
db425334 S |
286 | if (!feof(filep)) { |
287 | /* | |
288 | * We have more data to read. | |
289 | */ | |
290 | num_blocks++; | |
291 | record = realloc(record, alloc_unit * | |
292 | num_blocks); | |
293 | if (record == NULL) { | |
294 | fclose(filep); | |
fca59755 | 295 | close(fd); |
db425334 S |
296 | return 1; |
297 | } | |
298 | continue; | |
299 | } | |
300 | break; | |
301 | } | |
302 | kvp_file_info[i].fd = fd; | |
303 | kvp_file_info[i].num_blocks = num_blocks; | |
304 | kvp_file_info[i].records = record; | |
305 | kvp_file_info[i].num_records = records_read; | |
306 | fclose(filep); | |
307 | ||
308 | } | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
d892de8d | 313 | static int kvp_key_delete(int pool, const char *key, int key_size) |
db425334 S |
314 | { |
315 | int i; | |
316 | int j, k; | |
adc80ae6 S |
317 | int num_records; |
318 | struct kvp_record *record; | |
319 | ||
320 | /* | |
321 | * First update the in-memory state. | |
322 | */ | |
323 | kvp_update_mem_state(pool); | |
324 | ||
325 | num_records = kvp_file_info[pool].num_records; | |
326 | record = kvp_file_info[pool].records; | |
db425334 S |
327 | |
328 | for (i = 0; i < num_records; i++) { | |
329 | if (memcmp(key, record[i].key, key_size)) | |
330 | continue; | |
331 | /* | |
332 | * Found a match; just move the remaining | |
333 | * entries up. | |
334 | */ | |
335 | if (i == num_records) { | |
336 | kvp_file_info[pool].num_records--; | |
337 | kvp_update_file(pool); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | j = i; | |
342 | k = j + 1; | |
343 | for (; k < num_records; k++) { | |
344 | strcpy(record[j].key, record[k].key); | |
345 | strcpy(record[j].value, record[k].value); | |
346 | j++; | |
347 | } | |
348 | ||
349 | kvp_file_info[pool].num_records--; | |
350 | kvp_update_file(pool); | |
351 | return 0; | |
352 | } | |
353 | return 1; | |
354 | } | |
355 | ||
d892de8d | 356 | static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value, |
db425334 S |
357 | int value_size) |
358 | { | |
359 | int i; | |
adc80ae6 S |
360 | int num_records; |
361 | struct kvp_record *record; | |
362 | int num_blocks; | |
db425334 S |
363 | |
364 | if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || | |
365 | (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) | |
366 | return 1; | |
367 | ||
adc80ae6 S |
368 | /* |
369 | * First update the in-memory state. | |
370 | */ | |
371 | kvp_update_mem_state(pool); | |
372 | ||
373 | num_records = kvp_file_info[pool].num_records; | |
374 | record = kvp_file_info[pool].records; | |
375 | num_blocks = kvp_file_info[pool].num_blocks; | |
376 | ||
db425334 S |
377 | for (i = 0; i < num_records; i++) { |
378 | if (memcmp(key, record[i].key, key_size)) | |
379 | continue; | |
380 | /* | |
381 | * Found a match; just update the value - | |
382 | * this is the modify case. | |
383 | */ | |
384 | memcpy(record[i].value, value, value_size); | |
385 | kvp_update_file(pool); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Need to add a new entry; | |
391 | */ | |
392 | if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) { | |
393 | /* Need to allocate a larger array for reg entries. */ | |
394 | record = realloc(record, sizeof(struct kvp_record) * | |
395 | ENTRIES_PER_BLOCK * (num_blocks + 1)); | |
396 | ||
397 | if (record == NULL) | |
398 | return 1; | |
399 | kvp_file_info[pool].num_blocks++; | |
400 | ||
401 | } | |
402 | memcpy(record[i].value, value, value_size); | |
403 | memcpy(record[i].key, key, key_size); | |
404 | kvp_file_info[pool].records = record; | |
405 | kvp_file_info[pool].num_records++; | |
406 | kvp_update_file(pool); | |
407 | return 0; | |
408 | } | |
409 | ||
d892de8d | 410 | static int kvp_get_value(int pool, const char *key, int key_size, char *value, |
db425334 S |
411 | int value_size) |
412 | { | |
413 | int i; | |
adc80ae6 S |
414 | int num_records; |
415 | struct kvp_record *record; | |
db425334 S |
416 | |
417 | if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || | |
418 | (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) | |
419 | return 1; | |
420 | ||
adc80ae6 S |
421 | /* |
422 | * First update the in-memory state. | |
423 | */ | |
424 | kvp_update_mem_state(pool); | |
425 | ||
426 | num_records = kvp_file_info[pool].num_records; | |
427 | record = kvp_file_info[pool].records; | |
428 | ||
db425334 S |
429 | for (i = 0; i < num_records; i++) { |
430 | if (memcmp(key, record[i].key, key_size)) | |
431 | continue; | |
432 | /* | |
433 | * Found a match; just copy the value out. | |
434 | */ | |
435 | memcpy(value, record[i].value, value_size); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | return 1; | |
440 | } | |
441 | ||
d892de8d TH |
442 | static int kvp_pool_enumerate(int pool, int index, char *key, int key_size, |
443 | char *value, int value_size) | |
adc80ae6 S |
444 | { |
445 | struct kvp_record *record; | |
446 | ||
447 | /* | |
448 | * First update our in-memory database. | |
449 | */ | |
450 | kvp_update_mem_state(pool); | |
451 | record = kvp_file_info[pool].records; | |
452 | ||
453 | if (index >= kvp_file_info[pool].num_records) { | |
b47a81dc | 454 | return 1; |
adc80ae6 S |
455 | } |
456 | ||
457 | memcpy(key, record[index].key, key_size); | |
458 | memcpy(value, record[index].value, value_size); | |
b47a81dc | 459 | return 0; |
adc80ae6 S |
460 | } |
461 | ||
462 | ||
cc04acf5 KS |
463 | void kvp_get_os_info(void) |
464 | { | |
465 | FILE *file; | |
7989f7d5 | 466 | char *p, buf[512]; |
cc04acf5 | 467 | |
7989f7d5 | 468 | uname(&uts_buf); |
f426a36c S |
469 | os_version = uts_buf.release; |
470 | os_build = strdup(uts_buf.release); | |
471 | ||
44c8b25f | 472 | os_name = uts_buf.sysname; |
064931d0 | 473 | processor_arch = uts_buf.machine; |
cc04acf5 | 474 | |
e54bbc64 S |
475 | /* |
476 | * The current windows host (win7) expects the build | |
477 | * string to be of the form: x.y.z | |
478 | * Strip additional information we may have. | |
479 | */ | |
f426a36c | 480 | p = strchr(os_version, '-'); |
e54bbc64 S |
481 | if (p) |
482 | *p = '\0'; | |
483 | ||
44c8b25f BH |
484 | /* |
485 | * Parse the /etc/os-release file if present: | |
486 | * http://www.freedesktop.org/software/systemd/man/os-release.html | |
487 | */ | |
488 | file = fopen("/etc/os-release", "r"); | |
489 | if (file != NULL) { | |
490 | while (fgets(buf, sizeof(buf), file)) { | |
491 | char *value, *q; | |
492 | ||
493 | /* Ignore comments */ | |
494 | if (buf[0] == '#') | |
495 | continue; | |
496 | ||
497 | /* Split into name=value */ | |
498 | p = strchr(buf, '='); | |
499 | if (!p) | |
500 | continue; | |
501 | *p++ = 0; | |
502 | ||
503 | /* Remove quotes and newline; un-escape */ | |
504 | value = p; | |
505 | q = p; | |
506 | while (*p) { | |
507 | if (*p == '\\') { | |
508 | ++p; | |
509 | if (!*p) | |
510 | break; | |
511 | *q++ = *p++; | |
512 | } else if (*p == '\'' || *p == '"' || | |
513 | *p == '\n') { | |
514 | ++p; | |
515 | } else { | |
516 | *q++ = *p++; | |
517 | } | |
518 | } | |
519 | *q = 0; | |
520 | ||
521 | if (!strcmp(buf, "NAME")) { | |
522 | p = strdup(value); | |
523 | if (!p) | |
524 | break; | |
525 | os_name = p; | |
526 | } else if (!strcmp(buf, "VERSION_ID")) { | |
527 | p = strdup(value); | |
528 | if (!p) | |
529 | break; | |
530 | os_major = p; | |
531 | } | |
532 | } | |
533 | fclose(file); | |
534 | return; | |
535 | } | |
536 | ||
537 | /* Fallback for older RH/SUSE releases */ | |
cc04acf5 KS |
538 | file = fopen("/etc/SuSE-release", "r"); |
539 | if (file != NULL) | |
540 | goto kvp_osinfo_found; | |
541 | file = fopen("/etc/redhat-release", "r"); | |
542 | if (file != NULL) | |
543 | goto kvp_osinfo_found; | |
cc04acf5 KS |
544 | |
545 | /* | |
546 | * We don't have information about the os. | |
547 | */ | |
cc04acf5 KS |
548 | return; |
549 | ||
550 | kvp_osinfo_found: | |
7989f7d5 OH |
551 | /* up to three lines */ |
552 | p = fgets(buf, sizeof(buf), file); | |
553 | if (p) { | |
554 | p = strchr(buf, '\n'); | |
555 | if (p) | |
556 | *p = '\0'; | |
557 | p = strdup(buf); | |
558 | if (!p) | |
559 | goto done; | |
560 | os_name = p; | |
561 | ||
562 | /* second line */ | |
563 | p = fgets(buf, sizeof(buf), file); | |
564 | if (p) { | |
565 | p = strchr(buf, '\n'); | |
566 | if (p) | |
567 | *p = '\0'; | |
568 | p = strdup(buf); | |
569 | if (!p) | |
570 | goto done; | |
571 | os_major = p; | |
572 | ||
573 | /* third line */ | |
574 | p = fgets(buf, sizeof(buf), file); | |
575 | if (p) { | |
576 | p = strchr(buf, '\n'); | |
577 | if (p) | |
578 | *p = '\0'; | |
579 | p = strdup(buf); | |
580 | if (p) | |
581 | os_minor = p; | |
582 | } | |
583 | } | |
584 | } | |
585 | ||
586 | done: | |
cc04acf5 KS |
587 | fclose(file); |
588 | return; | |
589 | } | |
590 | ||
32061b4d S |
591 | |
592 | ||
593 | /* | |
594 | * Retrieve an interface name corresponding to the specified guid. | |
595 | * If there is a match, the function returns a pointer | |
596 | * to the interface name and if not, a NULL is returned. | |
597 | * If a match is found, the caller is responsible for | |
598 | * freeing the memory. | |
599 | */ | |
600 | ||
601 | static char *kvp_get_if_name(char *guid) | |
602 | { | |
603 | DIR *dir; | |
604 | struct dirent *entry; | |
605 | FILE *file; | |
606 | char *p, *q, *x; | |
607 | char *if_name = NULL; | |
608 | char buf[256]; | |
609 | char *kvp_net_dir = "/sys/class/net/"; | |
610 | char dev_id[256]; | |
611 | ||
612 | dir = opendir(kvp_net_dir); | |
613 | if (dir == NULL) | |
614 | return NULL; | |
615 | ||
616 | snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir); | |
617 | q = dev_id + strlen(kvp_net_dir); | |
618 | ||
619 | while ((entry = readdir(dir)) != NULL) { | |
620 | /* | |
621 | * Set the state for the next pass. | |
622 | */ | |
623 | *q = '\0'; | |
624 | strcat(dev_id, entry->d_name); | |
625 | strcat(dev_id, "/device/device_id"); | |
626 | ||
627 | file = fopen(dev_id, "r"); | |
628 | if (file == NULL) | |
629 | continue; | |
630 | ||
631 | p = fgets(buf, sizeof(buf), file); | |
632 | if (p) { | |
633 | x = strchr(p, '\n'); | |
634 | if (x) | |
635 | *x = '\0'; | |
636 | ||
637 | if (!strcmp(p, guid)) { | |
638 | /* | |
639 | * Found the guid match; return the interface | |
640 | * name. The caller will free the memory. | |
641 | */ | |
642 | if_name = strdup(entry->d_name); | |
643 | fclose(file); | |
644 | break; | |
645 | } | |
646 | } | |
647 | fclose(file); | |
648 | } | |
649 | ||
650 | closedir(dir); | |
651 | return if_name; | |
652 | } | |
653 | ||
654 | /* | |
655 | * Retrieve the MAC address given the interface name. | |
656 | */ | |
657 | ||
658 | static char *kvp_if_name_to_mac(char *if_name) | |
659 | { | |
660 | FILE *file; | |
661 | char *p, *x; | |
662 | char buf[256]; | |
663 | char addr_file[256]; | |
664 | int i; | |
665 | char *mac_addr = NULL; | |
666 | ||
667 | snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/", | |
668 | if_name, "/address"); | |
669 | ||
670 | file = fopen(addr_file, "r"); | |
671 | if (file == NULL) | |
672 | return NULL; | |
673 | ||
674 | p = fgets(buf, sizeof(buf), file); | |
675 | if (p) { | |
676 | x = strchr(p, '\n'); | |
677 | if (x) | |
678 | *x = '\0'; | |
679 | for (i = 0; i < strlen(p); i++) | |
680 | p[i] = toupper(p[i]); | |
681 | mac_addr = strdup(p); | |
682 | } | |
683 | ||
684 | fclose(file); | |
685 | return mac_addr; | |
686 | } | |
687 | ||
688 | ||
16e87100 S |
689 | /* |
690 | * Retrieve the interface name given tha MAC address. | |
691 | */ | |
692 | ||
693 | static char *kvp_mac_to_if_name(char *mac) | |
694 | { | |
695 | DIR *dir; | |
696 | struct dirent *entry; | |
697 | FILE *file; | |
698 | char *p, *q, *x; | |
699 | char *if_name = NULL; | |
700 | char buf[256]; | |
701 | char *kvp_net_dir = "/sys/class/net/"; | |
702 | char dev_id[256]; | |
703 | int i; | |
704 | ||
705 | dir = opendir(kvp_net_dir); | |
706 | if (dir == NULL) | |
707 | return NULL; | |
708 | ||
709 | snprintf(dev_id, sizeof(dev_id), kvp_net_dir); | |
710 | q = dev_id + strlen(kvp_net_dir); | |
711 | ||
712 | while ((entry = readdir(dir)) != NULL) { | |
713 | /* | |
714 | * Set the state for the next pass. | |
715 | */ | |
716 | *q = '\0'; | |
717 | ||
718 | strcat(dev_id, entry->d_name); | |
719 | strcat(dev_id, "/address"); | |
720 | ||
721 | file = fopen(dev_id, "r"); | |
722 | if (file == NULL) | |
723 | continue; | |
724 | ||
725 | p = fgets(buf, sizeof(buf), file); | |
726 | if (p) { | |
727 | x = strchr(p, '\n'); | |
728 | if (x) | |
729 | *x = '\0'; | |
730 | ||
731 | for (i = 0; i < strlen(p); i++) | |
732 | p[i] = toupper(p[i]); | |
733 | ||
734 | if (!strcmp(p, mac)) { | |
735 | /* | |
736 | * Found the MAC match; return the interface | |
737 | * name. The caller will free the memory. | |
738 | */ | |
739 | if_name = strdup(entry->d_name); | |
740 | fclose(file); | |
741 | break; | |
742 | } | |
743 | } | |
744 | fclose(file); | |
745 | } | |
746 | ||
747 | closedir(dir); | |
748 | return if_name; | |
749 | } | |
750 | ||
751 | ||
4a52c4af S |
752 | static void kvp_process_ipconfig_file(char *cmd, |
753 | char *config_buf, int len, | |
754 | int element_size, int offset) | |
755 | { | |
756 | char buf[256]; | |
757 | char *p; | |
758 | char *x; | |
759 | FILE *file; | |
760 | ||
761 | /* | |
762 | * First execute the command. | |
763 | */ | |
764 | file = popen(cmd, "r"); | |
765 | if (file == NULL) | |
766 | return; | |
767 | ||
768 | if (offset == 0) | |
769 | memset(config_buf, 0, len); | |
770 | while ((p = fgets(buf, sizeof(buf), file)) != NULL) { | |
771 | if ((len - strlen(config_buf)) < (element_size + 1)) | |
772 | break; | |
773 | ||
774 | x = strchr(p, '\n'); | |
f14e600a TH |
775 | if (x) |
776 | *x = '\0'; | |
777 | ||
4a52c4af S |
778 | strcat(config_buf, p); |
779 | strcat(config_buf, ";"); | |
780 | } | |
781 | pclose(file); | |
782 | } | |
783 | ||
784 | static void kvp_get_ipconfig_info(char *if_name, | |
785 | struct hv_kvp_ipaddr_value *buffer) | |
786 | { | |
787 | char cmd[512]; | |
c0503725 S |
788 | char dhcp_info[128]; |
789 | char *p; | |
790 | FILE *file; | |
4a52c4af S |
791 | |
792 | /* | |
793 | * Get the address of default gateway (ipv4). | |
794 | */ | |
795 | sprintf(cmd, "%s %s", "ip route show dev", if_name); | |
796 | strcat(cmd, " | awk '/default/ {print $3 }'"); | |
797 | ||
798 | /* | |
799 | * Execute the command to gather gateway info. | |
800 | */ | |
801 | kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, | |
802 | (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0); | |
803 | ||
804 | /* | |
805 | * Get the address of default gateway (ipv6). | |
806 | */ | |
807 | sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name); | |
808 | strcat(cmd, " | awk '/default/ {print $3 }'"); | |
809 | ||
810 | /* | |
811 | * Execute the command to gather gateway info (ipv6). | |
812 | */ | |
813 | kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, | |
814 | (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1); | |
815 | ||
96929887 S |
816 | |
817 | /* | |
818 | * Gather the DNS state. | |
819 | * Since there is no standard way to get this information | |
820 | * across various distributions of interest; we just invoke | |
821 | * an external script that needs to be ported across distros | |
822 | * of interest. | |
823 | * | |
824 | * Following is the expected format of the information from the script: | |
825 | * | |
826 | * ipaddr1 (nameserver1) | |
827 | * ipaddr2 (nameserver2) | |
828 | * . | |
829 | * . | |
830 | */ | |
831 | ||
832 | sprintf(cmd, "%s", "hv_get_dns_info"); | |
833 | ||
834 | /* | |
835 | * Execute the command to gather DNS info. | |
836 | */ | |
837 | kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr, | |
838 | (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0); | |
c0503725 S |
839 | |
840 | /* | |
841 | * Gather the DHCP state. | |
842 | * We will gather this state by invoking an external script. | |
843 | * The parameter to the script is the interface name. | |
844 | * Here is the expected output: | |
845 | * | |
846 | * Enabled: DHCP enabled. | |
847 | */ | |
848 | ||
849 | sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name); | |
850 | ||
851 | file = popen(cmd, "r"); | |
852 | if (file == NULL) | |
853 | return; | |
854 | ||
855 | p = fgets(dhcp_info, sizeof(dhcp_info), file); | |
856 | if (p == NULL) { | |
857 | pclose(file); | |
858 | return; | |
859 | } | |
860 | ||
861 | if (!strncmp(p, "Enabled", 7)) | |
862 | buffer->dhcp_enabled = 1; | |
863 | else | |
864 | buffer->dhcp_enabled = 0; | |
865 | ||
866 | pclose(file); | |
4a52c4af S |
867 | } |
868 | ||
869 | ||
6a60a6a8 S |
870 | static unsigned int hweight32(unsigned int *w) |
871 | { | |
872 | unsigned int res = *w - ((*w >> 1) & 0x55555555); | |
873 | res = (res & 0x33333333) + ((res >> 2) & 0x33333333); | |
874 | res = (res + (res >> 4)) & 0x0F0F0F0F; | |
875 | res = res + (res >> 8); | |
876 | return (res + (res >> 16)) & 0x000000FF; | |
877 | } | |
878 | ||
af733015 S |
879 | static int kvp_process_ip_address(void *addrp, |
880 | int family, char *buffer, | |
881 | int length, int *offset) | |
882 | { | |
883 | struct sockaddr_in *addr; | |
884 | struct sockaddr_in6 *addr6; | |
885 | int addr_length; | |
886 | char tmp[50]; | |
887 | const char *str; | |
888 | ||
889 | if (family == AF_INET) { | |
890 | addr = (struct sockaddr_in *)addrp; | |
891 | str = inet_ntop(family, &addr->sin_addr, tmp, 50); | |
892 | addr_length = INET_ADDRSTRLEN; | |
893 | } else { | |
894 | addr6 = (struct sockaddr_in6 *)addrp; | |
895 | str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50); | |
896 | addr_length = INET6_ADDRSTRLEN; | |
897 | } | |
898 | ||
3321e738 | 899 | if ((length - *offset) < addr_length + 2) |
16e87100 | 900 | return HV_E_FAIL; |
af733015 S |
901 | if (str == NULL) { |
902 | strcpy(buffer, "inet_ntop failed\n"); | |
16e87100 | 903 | return HV_E_FAIL; |
af733015 S |
904 | } |
905 | if (*offset == 0) | |
906 | strcpy(buffer, tmp); | |
3321e738 S |
907 | else { |
908 | strcat(buffer, ";"); | |
af733015 | 909 | strcat(buffer, tmp); |
3321e738 | 910 | } |
af733015 S |
911 | |
912 | *offset += strlen(str) + 1; | |
3321e738 | 913 | |
af733015 S |
914 | return 0; |
915 | } | |
916 | ||
cc04acf5 | 917 | static int |
4a3b97e5 | 918 | kvp_get_ip_info(int family, char *if_name, int op, |
0ecaa198 | 919 | void *out_buffer, int length) |
cc04acf5 KS |
920 | { |
921 | struct ifaddrs *ifap; | |
922 | struct ifaddrs *curp; | |
cc04acf5 | 923 | int offset = 0; |
04405784 | 924 | int sn_offset = 0; |
cc04acf5 | 925 | int error = 0; |
0ecaa198 S |
926 | char *buffer; |
927 | struct hv_kvp_ipaddr_value *ip_buffer; | |
6a60a6a8 S |
928 | char cidr_mask[5]; /* /xyz */ |
929 | int weight; | |
930 | int i; | |
931 | unsigned int *w; | |
932 | char *sn_str; | |
933 | struct sockaddr_in6 *addr6; | |
0ecaa198 S |
934 | |
935 | if (op == KVP_OP_ENUMERATE) { | |
936 | buffer = out_buffer; | |
937 | } else { | |
938 | ip_buffer = out_buffer; | |
939 | buffer = (char *)ip_buffer->ip_addr; | |
940 | ip_buffer->addr_family = 0; | |
941 | } | |
cc04acf5 KS |
942 | /* |
943 | * On entry into this function, the buffer is capable of holding the | |
0ecaa198 | 944 | * maximum key value. |
cc04acf5 KS |
945 | */ |
946 | ||
947 | if (getifaddrs(&ifap)) { | |
948 | strcpy(buffer, "getifaddrs failed\n"); | |
16e87100 | 949 | return HV_E_FAIL; |
cc04acf5 KS |
950 | } |
951 | ||
952 | curp = ifap; | |
953 | while (curp != NULL) { | |
0ecaa198 S |
954 | if (curp->ifa_addr == NULL) { |
955 | curp = curp->ifa_next; | |
956 | continue; | |
957 | } | |
cc04acf5 | 958 | |
0ecaa198 S |
959 | if ((if_name != NULL) && |
960 | (strncmp(curp->ifa_name, if_name, strlen(if_name)))) { | |
961 | /* | |
962 | * We want info about a specific interface; | |
963 | * just continue. | |
964 | */ | |
965 | curp = curp->ifa_next; | |
966 | continue; | |
967 | } | |
cc04acf5 | 968 | |
0ecaa198 S |
969 | /* |
970 | * We only support two address families: AF_INET and AF_INET6. | |
971 | * If a family value of 0 is specified, we collect both | |
972 | * supported address families; if not we gather info on | |
973 | * the specified address family. | |
974 | */ | |
3321e738 S |
975 | if ((((family != 0) && |
976 | (curp->ifa_addr->sa_family != family))) || | |
977 | (curp->ifa_flags & IFF_LOOPBACK)) { | |
0ecaa198 S |
978 | curp = curp->ifa_next; |
979 | continue; | |
980 | } | |
981 | if ((curp->ifa_addr->sa_family != AF_INET) && | |
982 | (curp->ifa_addr->sa_family != AF_INET6)) { | |
983 | curp = curp->ifa_next; | |
984 | continue; | |
985 | } | |
986 | ||
0d5b6b19 S |
987 | if (op == KVP_OP_GET_IP_INFO) { |
988 | /* | |
989 | * Gather info other than the IP address. | |
990 | * IP address info will be gathered later. | |
991 | */ | |
04405784 | 992 | if (curp->ifa_addr->sa_family == AF_INET) { |
0d5b6b19 | 993 | ip_buffer->addr_family |= ADDR_FAMILY_IPV4; |
04405784 S |
994 | /* |
995 | * Get subnet info. | |
996 | */ | |
997 | error = kvp_process_ip_address( | |
998 | curp->ifa_netmask, | |
999 | AF_INET, | |
1000 | (char *) | |
1001 | ip_buffer->sub_net, | |
1002 | length, | |
1003 | &sn_offset); | |
1004 | if (error) | |
1005 | goto gather_ipaddr; | |
1006 | } else { | |
0d5b6b19 | 1007 | ip_buffer->addr_family |= ADDR_FAMILY_IPV6; |
6a60a6a8 | 1008 | |
04405784 | 1009 | /* |
6a60a6a8 | 1010 | * Get subnet info in CIDR format. |
04405784 | 1011 | */ |
6a60a6a8 S |
1012 | weight = 0; |
1013 | sn_str = (char *)ip_buffer->sub_net; | |
1014 | addr6 = (struct sockaddr_in6 *) | |
1015 | curp->ifa_netmask; | |
1016 | w = addr6->sin6_addr.s6_addr32; | |
1017 | ||
1018 | for (i = 0; i < 4; i++) | |
1019 | weight += hweight32(&w[i]); | |
1020 | ||
1021 | sprintf(cidr_mask, "/%d", weight); | |
1022 | if ((length - sn_offset) < | |
1023 | (strlen(cidr_mask) + 1)) | |
04405784 | 1024 | goto gather_ipaddr; |
6a60a6a8 S |
1025 | |
1026 | if (sn_offset == 0) | |
1027 | strcpy(sn_str, cidr_mask); | |
ed4bb974 S |
1028 | else { |
1029 | strcat((char *)ip_buffer->sub_net, ";"); | |
6a60a6a8 | 1030 | strcat(sn_str, cidr_mask); |
ed4bb974 | 1031 | } |
6a60a6a8 | 1032 | sn_offset += strlen(sn_str) + 1; |
04405784 | 1033 | } |
4a52c4af S |
1034 | |
1035 | /* | |
1036 | * Collect other ip related configuration info. | |
1037 | */ | |
1038 | ||
1039 | kvp_get_ipconfig_info(if_name, ip_buffer); | |
0d5b6b19 S |
1040 | } |
1041 | ||
04405784 | 1042 | gather_ipaddr: |
af733015 S |
1043 | error = kvp_process_ip_address(curp->ifa_addr, |
1044 | curp->ifa_addr->sa_family, | |
1045 | buffer, | |
1046 | length, &offset); | |
1047 | if (error) | |
1048 | goto getaddr_done; | |
0ecaa198 | 1049 | |
cc04acf5 KS |
1050 | curp = curp->ifa_next; |
1051 | } | |
1052 | ||
1053 | getaddr_done: | |
1054 | freeifaddrs(ifap); | |
1055 | return error; | |
1056 | } | |
1057 | ||
1058 | ||
32061b4d S |
1059 | static int expand_ipv6(char *addr, int type) |
1060 | { | |
1061 | int ret; | |
1062 | struct in6_addr v6_addr; | |
1063 | ||
1064 | ret = inet_pton(AF_INET6, addr, &v6_addr); | |
1065 | ||
1066 | if (ret != 1) { | |
1067 | if (type == NETMASK) | |
1068 | return 1; | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:" | |
1073 | "%02x%02x:%02x%02x:%02x%02x", | |
1074 | (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1], | |
1075 | (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3], | |
1076 | (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5], | |
1077 | (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7], | |
1078 | (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9], | |
1079 | (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11], | |
1080 | (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13], | |
1081 | (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]); | |
1082 | ||
1083 | return 1; | |
1084 | ||
1085 | } | |
1086 | ||
1087 | static int is_ipv4(char *addr) | |
1088 | { | |
1089 | int ret; | |
1090 | struct in_addr ipv4_addr; | |
1091 | ||
1092 | ret = inet_pton(AF_INET, addr, &ipv4_addr); | |
1093 | ||
1094 | if (ret == 1) | |
1095 | return 1; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int parse_ip_val_buffer(char *in_buf, int *offset, | |
1100 | char *out_buf, int out_len) | |
1101 | { | |
1102 | char *x; | |
1103 | char *start; | |
1104 | ||
1105 | /* | |
1106 | * in_buf has sequence of characters that are seperated by | |
1107 | * the character ';'. The last sequence does not have the | |
1108 | * terminating ";" character. | |
1109 | */ | |
1110 | start = in_buf + *offset; | |
1111 | ||
1112 | x = strchr(start, ';'); | |
1113 | if (x) | |
1114 | *x = 0; | |
1115 | else | |
1116 | x = start + strlen(start); | |
1117 | ||
1118 | if (strlen(start) != 0) { | |
1119 | int i = 0; | |
1120 | /* | |
1121 | * Get rid of leading spaces. | |
1122 | */ | |
1123 | while (start[i] == ' ') | |
1124 | i++; | |
1125 | ||
1126 | if ((x - start) <= out_len) { | |
1127 | strcpy(out_buf, (start + i)); | |
1128 | *offset += (x - start) + 1; | |
1129 | return 1; | |
1130 | } | |
1131 | } | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3) | |
1136 | { | |
1137 | int ret; | |
1138 | ||
1139 | ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3); | |
1140 | ||
1141 | if (ret < 0) | |
1142 | return HV_E_FAIL; | |
1143 | ||
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | ||
1148 | static int process_ip_string(FILE *f, char *ip_string, int type) | |
1149 | { | |
1150 | int error = 0; | |
1151 | char addr[INET6_ADDRSTRLEN]; | |
1152 | int i = 0; | |
1153 | int j = 0; | |
1154 | char str[256]; | |
1155 | char sub_str[10]; | |
1156 | int offset = 0; | |
1157 | ||
1158 | memset(addr, 0, sizeof(addr)); | |
1159 | ||
1160 | while (parse_ip_val_buffer(ip_string, &offset, addr, | |
1161 | (MAX_IP_ADDR_SIZE * 2))) { | |
1162 | ||
1163 | sub_str[0] = 0; | |
1164 | if (is_ipv4(addr)) { | |
1165 | switch (type) { | |
1166 | case IPADDR: | |
1167 | snprintf(str, sizeof(str), "%s", "IPADDR"); | |
1168 | break; | |
1169 | case NETMASK: | |
1170 | snprintf(str, sizeof(str), "%s", "NETMASK"); | |
1171 | break; | |
1172 | case GATEWAY: | |
1173 | snprintf(str, sizeof(str), "%s", "GATEWAY"); | |
1174 | break; | |
1175 | case DNS: | |
1176 | snprintf(str, sizeof(str), "%s", "DNS"); | |
1177 | break; | |
1178 | } | |
0783d72f TH |
1179 | |
1180 | if (type == DNS) { | |
32061b4d | 1181 | snprintf(sub_str, sizeof(sub_str), "%d", ++i); |
0783d72f TH |
1182 | } else if (type == GATEWAY && i == 0) { |
1183 | ++i; | |
1184 | } else { | |
1185 | snprintf(sub_str, sizeof(sub_str), "%d", i++); | |
32061b4d S |
1186 | } |
1187 | ||
1188 | ||
1189 | } else if (expand_ipv6(addr, type)) { | |
1190 | switch (type) { | |
1191 | case IPADDR: | |
1192 | snprintf(str, sizeof(str), "%s", "IPV6ADDR"); | |
1193 | break; | |
1194 | case NETMASK: | |
1195 | snprintf(str, sizeof(str), "%s", "IPV6NETMASK"); | |
1196 | break; | |
1197 | case GATEWAY: | |
1198 | snprintf(str, sizeof(str), "%s", | |
1199 | "IPV6_DEFAULTGW"); | |
1200 | break; | |
1201 | case DNS: | |
1202 | snprintf(str, sizeof(str), "%s", "DNS"); | |
1203 | break; | |
1204 | } | |
0783d72f TH |
1205 | |
1206 | if (type == DNS) { | |
1207 | snprintf(sub_str, sizeof(sub_str), "%d", ++i); | |
1208 | } else if (j == 0) { | |
1209 | ++j; | |
1210 | } else { | |
1211 | snprintf(sub_str, sizeof(sub_str), "_%d", j++); | |
32061b4d S |
1212 | } |
1213 | } else { | |
1214 | return HV_INVALIDARG; | |
1215 | } | |
1216 | ||
1217 | error = kvp_write_file(f, str, sub_str, addr); | |
1218 | if (error) | |
1219 | return error; | |
1220 | memset(addr, 0, sizeof(addr)); | |
1221 | } | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) | |
1227 | { | |
1228 | int error = 0; | |
1229 | char if_file[128]; | |
1230 | FILE *file; | |
1231 | char cmd[512]; | |
1232 | char *mac_addr; | |
1233 | ||
1234 | /* | |
1235 | * Set the configuration for the specified interface with | |
1236 | * the information provided. Since there is no standard | |
1237 | * way to configure an interface, we will have an external | |
1238 | * script that does the job of configuring the interface and | |
1239 | * flushing the configuration. | |
1240 | * | |
1241 | * The parameters passed to this external script are: | |
1242 | * 1. A configuration file that has the specified configuration. | |
1243 | * | |
1244 | * We will embed the name of the interface in the configuration | |
1245 | * file: ifcfg-ethx (where ethx is the interface name). | |
1246 | * | |
1247 | * The information provided here may be more than what is needed | |
1248 | * in a given distro to configure the interface and so are free | |
1249 | * ignore information that may not be relevant. | |
1250 | * | |
1251 | * Here is the format of the ip configuration file: | |
1252 | * | |
1253 | * HWADDR=macaddr | |
0783d72f TH |
1254 | * DEVICE=interface name |
1255 | * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured | |
1256 | * or "none" if no boot-time protocol should be used) | |
32061b4d | 1257 | * |
0783d72f TH |
1258 | * IPADDR0=ipaddr1 |
1259 | * IPADDR1=ipaddr2 | |
1260 | * IPADDRx=ipaddry (where y = x + 1) | |
32061b4d | 1261 | * |
0783d72f TH |
1262 | * NETMASK0=netmask1 |
1263 | * NETMASKx=netmasky (where y = x + 1) | |
32061b4d S |
1264 | * |
1265 | * GATEWAY=ipaddr1 | |
0783d72f | 1266 | * GATEWAYx=ipaddry (where y = x + 1) |
32061b4d S |
1267 | * |
1268 | * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc) | |
1269 | * | |
1270 | * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be | |
1271 | * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as | |
1272 | * IPV6NETMASK. | |
1273 | * | |
1274 | * The host can specify multiple ipv4 and ipv6 addresses to be | |
1275 | * configured for the interface. Furthermore, the configuration | |
1276 | * needs to be persistent. A subsequent GET call on the interface | |
1277 | * is expected to return the configuration that is set via the SET | |
1278 | * call. | |
1279 | */ | |
1280 | ||
1281 | snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC, | |
40424f5f | 1282 | "/ifcfg-", if_name); |
32061b4d S |
1283 | |
1284 | file = fopen(if_file, "w"); | |
1285 | ||
1286 | if (file == NULL) { | |
12e50c30 TH |
1287 | syslog(LOG_ERR, "Failed to open config file; error: %d %s", |
1288 | errno, strerror(errno)); | |
32061b4d S |
1289 | return HV_E_FAIL; |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * First write out the MAC address. | |
1294 | */ | |
1295 | ||
1296 | mac_addr = kvp_if_name_to_mac(if_name); | |
1297 | if (mac_addr == NULL) { | |
1298 | error = HV_E_FAIL; | |
1299 | goto setval_error; | |
1300 | } | |
1301 | ||
1302 | error = kvp_write_file(file, "HWADDR", "", mac_addr); | |
57969af0 | 1303 | free(mac_addr); |
32061b4d S |
1304 | if (error) |
1305 | goto setval_error; | |
1306 | ||
0783d72f | 1307 | error = kvp_write_file(file, "DEVICE", "", if_name); |
32061b4d S |
1308 | if (error) |
1309 | goto setval_error; | |
1310 | ||
1311 | if (new_val->dhcp_enabled) { | |
0783d72f | 1312 | error = kvp_write_file(file, "BOOTPROTO", "", "dhcp"); |
32061b4d S |
1313 | if (error) |
1314 | goto setval_error; | |
1315 | ||
1316 | /* | |
1317 | * We are done!. | |
1318 | */ | |
1319 | goto setval_done; | |
0783d72f TH |
1320 | |
1321 | } else { | |
1322 | error = kvp_write_file(file, "BOOTPROTO", "", "none"); | |
1323 | if (error) | |
1324 | goto setval_error; | |
32061b4d S |
1325 | } |
1326 | ||
1327 | /* | |
1328 | * Write the configuration for ipaddress, netmask, gateway and | |
1329 | * name servers. | |
1330 | */ | |
1331 | ||
1332 | error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR); | |
1333 | if (error) | |
1334 | goto setval_error; | |
1335 | ||
1336 | error = process_ip_string(file, (char *)new_val->sub_net, NETMASK); | |
1337 | if (error) | |
1338 | goto setval_error; | |
1339 | ||
1340 | error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY); | |
1341 | if (error) | |
1342 | goto setval_error; | |
1343 | ||
1344 | error = process_ip_string(file, (char *)new_val->dns_addr, DNS); | |
1345 | if (error) | |
1346 | goto setval_error; | |
1347 | ||
1348 | setval_done: | |
32061b4d S |
1349 | fclose(file); |
1350 | ||
1351 | /* | |
1352 | * Now that we have populated the configuration file, | |
1353 | * invoke the external script to do its magic. | |
1354 | */ | |
1355 | ||
1356 | snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file); | |
d3b688c6 OH |
1357 | if (system(cmd)) { |
1358 | syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s", | |
1359 | cmd, errno, strerror(errno)); | |
1360 | return HV_E_FAIL; | |
1361 | } | |
32061b4d S |
1362 | return 0; |
1363 | ||
1364 | setval_error: | |
1365 | syslog(LOG_ERR, "Failed to write config file"); | |
32061b4d S |
1366 | fclose(file); |
1367 | return error; | |
1368 | } | |
1369 | ||
1370 | ||
58125210 | 1371 | static void |
cc04acf5 KS |
1372 | kvp_get_domain_name(char *buffer, int length) |
1373 | { | |
1374 | struct addrinfo hints, *info ; | |
cc04acf5 KS |
1375 | int error = 0; |
1376 | ||
5be528c2 | 1377 | gethostname(buffer, length); |
cc04acf5 KS |
1378 | memset(&hints, 0, sizeof(hints)); |
1379 | hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */ | |
1380 | hints.ai_socktype = SOCK_STREAM; | |
1381 | hints.ai_flags = AI_CANONNAME; | |
1382 | ||
5be528c2 | 1383 | error = getaddrinfo(buffer, NULL, &hints, &info); |
cc04acf5 | 1384 | if (error != 0) { |
58125210 OH |
1385 | snprintf(buffer, length, "getaddrinfo failed: 0x%x %s", |
1386 | error, gai_strerror(error)); | |
1387 | return; | |
cc04acf5 | 1388 | } |
58125210 | 1389 | snprintf(buffer, length, "%s", info->ai_canonname); |
cc04acf5 | 1390 | freeaddrinfo(info); |
cc04acf5 KS |
1391 | } |
1392 | ||
1393 | static int | |
1394 | netlink_send(int fd, struct cn_msg *msg) | |
1395 | { | |
b4fb0ca2 | 1396 | struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE }; |
cc04acf5 KS |
1397 | unsigned int size; |
1398 | struct msghdr message; | |
cc04acf5 KS |
1399 | struct iovec iov[2]; |
1400 | ||
2bc41ea3 | 1401 | size = sizeof(struct cn_msg) + msg->len; |
cc04acf5 | 1402 | |
b4fb0ca2 OH |
1403 | nlh.nlmsg_pid = getpid(); |
1404 | nlh.nlmsg_len = NLMSG_LENGTH(size); | |
cc04acf5 | 1405 | |
b4fb0ca2 OH |
1406 | iov[0].iov_base = &nlh; |
1407 | iov[0].iov_len = sizeof(nlh); | |
cc04acf5 KS |
1408 | |
1409 | iov[1].iov_base = msg; | |
1410 | iov[1].iov_len = size; | |
1411 | ||
1412 | memset(&message, 0, sizeof(message)); | |
1413 | message.msg_name = &addr; | |
1414 | message.msg_namelen = sizeof(addr); | |
1415 | message.msg_iov = iov; | |
1416 | message.msg_iovlen = 2; | |
1417 | ||
1418 | return sendmsg(fd, &message, 0); | |
1419 | } | |
1420 | ||
7989f7d5 | 1421 | int main(void) |
cc04acf5 | 1422 | { |
f4685fa6 | 1423 | int fd, len, nl_group; |
cc04acf5 KS |
1424 | int error; |
1425 | struct cn_msg *message; | |
1426 | struct pollfd pfd; | |
1427 | struct nlmsghdr *incoming_msg; | |
1428 | struct cn_msg *incoming_cn_msg; | |
26403354 | 1429 | struct hv_kvp_msg *hv_msg; |
7989f7d5 | 1430 | char *p; |
cc04acf5 KS |
1431 | char *key_value; |
1432 | char *key_name; | |
b47a81dc S |
1433 | int op; |
1434 | int pool; | |
32061b4d S |
1435 | char *if_name; |
1436 | struct hv_kvp_ipaddr_value *kvp_ip_val; | |
b4919a5f OH |
1437 | char *kvp_recv_buffer; |
1438 | size_t kvp_recv_buffer_len; | |
cc04acf5 | 1439 | |
00663d73 OH |
1440 | if (daemon(1, 0)) |
1441 | return 1; | |
cc04acf5 KS |
1442 | openlog("KVP", 0, LOG_USER); |
1443 | syslog(LOG_INFO, "KVP starting; pid is:%d", getpid()); | |
b4919a5f | 1444 | |
269ce62b | 1445 | kvp_recv_buffer_len = NLMSG_LENGTH(0) + sizeof(struct cn_msg) + sizeof(struct hv_kvp_msg); |
b4919a5f | 1446 | kvp_recv_buffer = calloc(1, kvp_recv_buffer_len); |
269ce62b OH |
1447 | if (!kvp_recv_buffer) { |
1448 | syslog(LOG_ERR, "Failed to allocate netlink buffer"); | |
b4919a5f OH |
1449 | exit(EXIT_FAILURE); |
1450 | } | |
cc04acf5 KS |
1451 | /* |
1452 | * Retrieve OS release information. | |
1453 | */ | |
1454 | kvp_get_os_info(); | |
58125210 OH |
1455 | /* |
1456 | * Cache Fully Qualified Domain Name because getaddrinfo takes an | |
1457 | * unpredictable amount of time to finish. | |
1458 | */ | |
1459 | kvp_get_domain_name(full_domain_name, sizeof(full_domain_name)); | |
cc04acf5 | 1460 | |
db425334 S |
1461 | if (kvp_file_init()) { |
1462 | syslog(LOG_ERR, "Failed to initialize the pools"); | |
6bb22fea | 1463 | exit(EXIT_FAILURE); |
db425334 S |
1464 | } |
1465 | ||
cc04acf5 KS |
1466 | fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR); |
1467 | if (fd < 0) { | |
12e50c30 TH |
1468 | syslog(LOG_ERR, "netlink socket creation failed; error: %d %s", errno, |
1469 | strerror(errno)); | |
6bb22fea | 1470 | exit(EXIT_FAILURE); |
cc04acf5 KS |
1471 | } |
1472 | addr.nl_family = AF_NETLINK; | |
1473 | addr.nl_pad = 0; | |
1474 | addr.nl_pid = 0; | |
77d6a528 | 1475 | addr.nl_groups = 0; |
cc04acf5 KS |
1476 | |
1477 | ||
1478 | error = bind(fd, (struct sockaddr *)&addr, sizeof(addr)); | |
1479 | if (error < 0) { | |
12e50c30 | 1480 | syslog(LOG_ERR, "bind failed; error: %d %s", errno, strerror(errno)); |
cc04acf5 | 1481 | close(fd); |
6bb22fea | 1482 | exit(EXIT_FAILURE); |
cc04acf5 | 1483 | } |
f4685fa6 | 1484 | nl_group = CN_KVP_IDX; |
35901603 TH |
1485 | |
1486 | if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) { | |
1487 | syslog(LOG_ERR, "setsockopt failed; error: %d %s", errno, strerror(errno)); | |
1488 | close(fd); | |
1489 | exit(EXIT_FAILURE); | |
1490 | } | |
1491 | ||
cc04acf5 KS |
1492 | /* |
1493 | * Register ourselves with the kernel. | |
1494 | */ | |
269ce62b | 1495 | message = (struct cn_msg *)kvp_recv_buffer; |
cc04acf5 KS |
1496 | message->id.idx = CN_KVP_IDX; |
1497 | message->id.val = CN_KVP_VAL; | |
26403354 S |
1498 | |
1499 | hv_msg = (struct hv_kvp_msg *)message->data; | |
b47a81dc | 1500 | hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1; |
cc04acf5 | 1501 | message->ack = 0; |
26403354 | 1502 | message->len = sizeof(struct hv_kvp_msg); |
cc04acf5 KS |
1503 | |
1504 | len = netlink_send(fd, message); | |
1505 | if (len < 0) { | |
12e50c30 | 1506 | syslog(LOG_ERR, "netlink_send failed; error: %d %s", errno, strerror(errno)); |
cc04acf5 | 1507 | close(fd); |
6bb22fea | 1508 | exit(EXIT_FAILURE); |
cc04acf5 KS |
1509 | } |
1510 | ||
1511 | pfd.fd = fd; | |
1512 | ||
1513 | while (1) { | |
bcc2c9c3 OH |
1514 | struct sockaddr *addr_p = (struct sockaddr *) &addr; |
1515 | socklen_t addr_l = sizeof(addr); | |
cc04acf5 KS |
1516 | pfd.events = POLLIN; |
1517 | pfd.revents = 0; | |
4d81e307 TH |
1518 | |
1519 | if (poll(&pfd, 1, -1) < 0) { | |
1520 | syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno)); | |
1521 | if (errno == EINVAL) { | |
1522 | close(fd); | |
1523 | exit(EXIT_FAILURE); | |
1524 | } | |
1525 | else | |
1526 | continue; | |
1527 | } | |
cc04acf5 | 1528 | |
b4919a5f | 1529 | len = recvfrom(fd, kvp_recv_buffer, kvp_recv_buffer_len, 0, |
bcc2c9c3 | 1530 | addr_p, &addr_l); |
cc04acf5 | 1531 | |
95a69ada | 1532 | if (len < 0) { |
bcc2c9c3 OH |
1533 | syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s", |
1534 | addr.nl_pid, errno, strerror(errno)); | |
cc04acf5 KS |
1535 | close(fd); |
1536 | return -1; | |
1537 | } | |
1538 | ||
95a69ada TH |
1539 | if (addr.nl_pid) { |
1540 | syslog(LOG_WARNING, "Received packet from untrusted pid:%u", | |
1541 | addr.nl_pid); | |
1542 | continue; | |
1543 | } | |
1544 | ||
cc04acf5 | 1545 | incoming_msg = (struct nlmsghdr *)kvp_recv_buffer; |
75db6014 TH |
1546 | |
1547 | if (incoming_msg->nlmsg_type != NLMSG_DONE) | |
1548 | continue; | |
1549 | ||
cc04acf5 | 1550 | incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg); |
26403354 | 1551 | hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data; |
cc04acf5 | 1552 | |
b47a81dc S |
1553 | /* |
1554 | * We will use the KVP header information to pass back | |
1555 | * the error from this daemon. So, first copy the state | |
1556 | * and set the error code to success. | |
1557 | */ | |
1558 | op = hv_msg->kvp_hdr.operation; | |
1559 | pool = hv_msg->kvp_hdr.pool; | |
1560 | hv_msg->error = HV_S_OK; | |
1561 | ||
1562 | if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) { | |
cc04acf5 KS |
1563 | /* |
1564 | * Driver is registering with us; stash away the version | |
1565 | * information. | |
1566 | */ | |
b47a81dc | 1567 | in_hand_shake = 0; |
e485ceac | 1568 | p = (char *)hv_msg->body.kvp_register.version; |
7989f7d5 | 1569 | lic_version = malloc(strlen(p) + 1); |
cc04acf5 | 1570 | if (lic_version) { |
7989f7d5 | 1571 | strcpy(lic_version, p); |
cc04acf5 KS |
1572 | syslog(LOG_INFO, "KVP LIC Version: %s", |
1573 | lic_version); | |
1574 | } else { | |
1575 | syslog(LOG_ERR, "malloc failed"); | |
1576 | } | |
1577 | continue; | |
b47a81dc | 1578 | } |
cc04acf5 | 1579 | |
b47a81dc | 1580 | switch (op) { |
16e87100 S |
1581 | case KVP_OP_GET_IP_INFO: |
1582 | kvp_ip_val = &hv_msg->body.kvp_ip_val; | |
1583 | if_name = | |
1584 | kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id); | |
1585 | ||
1586 | if (if_name == NULL) { | |
1587 | /* | |
1588 | * We could not map the mac address to an | |
1589 | * interface name; return error. | |
1590 | */ | |
1591 | hv_msg->error = HV_E_FAIL; | |
1592 | break; | |
1593 | } | |
1594 | error = kvp_get_ip_info( | |
1595 | 0, if_name, KVP_OP_GET_IP_INFO, | |
1596 | kvp_ip_val, | |
1597 | (MAX_IP_ADDR_SIZE * 2)); | |
1598 | ||
1599 | if (error) | |
1600 | hv_msg->error = error; | |
1601 | ||
1602 | free(if_name); | |
1603 | break; | |
1604 | ||
32061b4d S |
1605 | case KVP_OP_SET_IP_INFO: |
1606 | kvp_ip_val = &hv_msg->body.kvp_ip_val; | |
1607 | if_name = kvp_get_if_name( | |
1608 | (char *)kvp_ip_val->adapter_id); | |
1609 | if (if_name == NULL) { | |
1610 | /* | |
1611 | * We could not map the guid to an | |
1612 | * interface name; return error. | |
1613 | */ | |
1614 | hv_msg->error = HV_GUID_NOTFOUND; | |
1615 | break; | |
1616 | } | |
1617 | error = kvp_set_ip_info(if_name, kvp_ip_val); | |
1618 | if (error) | |
1619 | hv_msg->error = error; | |
1620 | ||
1621 | free(if_name); | |
1622 | break; | |
1623 | ||
fa3d5b85 | 1624 | case KVP_OP_SET: |
b47a81dc | 1625 | if (kvp_key_add_or_modify(pool, |
db425334 S |
1626 | hv_msg->body.kvp_set.data.key, |
1627 | hv_msg->body.kvp_set.data.key_size, | |
1628 | hv_msg->body.kvp_set.data.value, | |
1629 | hv_msg->body.kvp_set.data.value_size)) | |
b47a81dc | 1630 | hv_msg->error = HV_S_CONT; |
db425334 S |
1631 | break; |
1632 | ||
fa3d5b85 | 1633 | case KVP_OP_GET: |
b47a81dc | 1634 | if (kvp_get_value(pool, |
db425334 S |
1635 | hv_msg->body.kvp_set.data.key, |
1636 | hv_msg->body.kvp_set.data.key_size, | |
1637 | hv_msg->body.kvp_set.data.value, | |
1638 | hv_msg->body.kvp_set.data.value_size)) | |
b47a81dc | 1639 | hv_msg->error = HV_S_CONT; |
db425334 S |
1640 | break; |
1641 | ||
fa3d5b85 | 1642 | case KVP_OP_DELETE: |
b47a81dc | 1643 | if (kvp_key_delete(pool, |
db425334 S |
1644 | hv_msg->body.kvp_delete.key, |
1645 | hv_msg->body.kvp_delete.key_size)) | |
b47a81dc | 1646 | hv_msg->error = HV_S_CONT; |
db425334 S |
1647 | break; |
1648 | ||
cc04acf5 | 1649 | default: |
26403354 | 1650 | break; |
cc04acf5 KS |
1651 | } |
1652 | ||
b47a81dc | 1653 | if (op != KVP_OP_ENUMERATE) |
fa3d5b85 S |
1654 | goto kvp_done; |
1655 | ||
adc80ae6 S |
1656 | /* |
1657 | * If the pool is KVP_POOL_AUTO, dynamically generate | |
1658 | * both the key and the value; if not read from the | |
1659 | * appropriate pool. | |
1660 | */ | |
b47a81dc S |
1661 | if (pool != KVP_POOL_AUTO) { |
1662 | if (kvp_pool_enumerate(pool, | |
adc80ae6 S |
1663 | hv_msg->body.kvp_enum_data.index, |
1664 | hv_msg->body.kvp_enum_data.data.key, | |
1665 | HV_KVP_EXCHANGE_MAX_KEY_SIZE, | |
1666 | hv_msg->body.kvp_enum_data.data.value, | |
b47a81dc S |
1667 | HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) |
1668 | hv_msg->error = HV_S_CONT; | |
adc80ae6 S |
1669 | goto kvp_done; |
1670 | } | |
1671 | ||
26403354 S |
1672 | hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data; |
1673 | key_name = (char *)hv_msg->body.kvp_enum_data.data.key; | |
1674 | key_value = (char *)hv_msg->body.kvp_enum_data.data.value; | |
cc04acf5 | 1675 | |
26403354 | 1676 | switch (hv_msg->body.kvp_enum_data.index) { |
cc04acf5 | 1677 | case FullyQualifiedDomainName: |
58125210 | 1678 | strcpy(key_value, full_domain_name); |
cc04acf5 KS |
1679 | strcpy(key_name, "FullyQualifiedDomainName"); |
1680 | break; | |
1681 | case IntegrationServicesVersion: | |
1682 | strcpy(key_name, "IntegrationServicesVersion"); | |
1683 | strcpy(key_value, lic_version); | |
1684 | break; | |
1685 | case NetworkAddressIPv4: | |
4a3b97e5 | 1686 | kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE, |
0ecaa198 | 1687 | key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); |
cc04acf5 KS |
1688 | strcpy(key_name, "NetworkAddressIPv4"); |
1689 | break; | |
1690 | case NetworkAddressIPv6: | |
4a3b97e5 | 1691 | kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE, |
0ecaa198 | 1692 | key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); |
cc04acf5 KS |
1693 | strcpy(key_name, "NetworkAddressIPv6"); |
1694 | break; | |
1695 | case OSBuildNumber: | |
1696 | strcpy(key_value, os_build); | |
1697 | strcpy(key_name, "OSBuildNumber"); | |
1698 | break; | |
1699 | case OSName: | |
1700 | strcpy(key_value, os_name); | |
1701 | strcpy(key_name, "OSName"); | |
1702 | break; | |
1703 | case OSMajorVersion: | |
1704 | strcpy(key_value, os_major); | |
1705 | strcpy(key_name, "OSMajorVersion"); | |
1706 | break; | |
1707 | case OSMinorVersion: | |
1708 | strcpy(key_value, os_minor); | |
1709 | strcpy(key_name, "OSMinorVersion"); | |
1710 | break; | |
1711 | case OSVersion: | |
f426a36c | 1712 | strcpy(key_value, os_version); |
cc04acf5 KS |
1713 | strcpy(key_name, "OSVersion"); |
1714 | break; | |
1715 | case ProcessorArchitecture: | |
1716 | strcpy(key_value, processor_arch); | |
1717 | strcpy(key_name, "ProcessorArchitecture"); | |
1718 | break; | |
1719 | default: | |
b47a81dc | 1720 | hv_msg->error = HV_S_CONT; |
cc04acf5 KS |
1721 | break; |
1722 | } | |
1723 | /* | |
1724 | * Send the value back to the kernel. The response is | |
1725 | * already in the receive buffer. Update the cn_msg header to | |
1726 | * reflect the key value that has been added to the message | |
1727 | */ | |
fa3d5b85 | 1728 | kvp_done: |
cc04acf5 KS |
1729 | |
1730 | incoming_cn_msg->id.idx = CN_KVP_IDX; | |
1731 | incoming_cn_msg->id.val = CN_KVP_VAL; | |
cc04acf5 | 1732 | incoming_cn_msg->ack = 0; |
26403354 | 1733 | incoming_cn_msg->len = sizeof(struct hv_kvp_msg); |
cc04acf5 KS |
1734 | |
1735 | len = netlink_send(fd, incoming_cn_msg); | |
1736 | if (len < 0) { | |
12e50c30 TH |
1737 | syslog(LOG_ERR, "net_link send failed; error: %d %s", errno, |
1738 | strerror(errno)); | |
6bb22fea | 1739 | exit(EXIT_FAILURE); |
cc04acf5 KS |
1740 | } |
1741 | } | |
1742 | ||
1743 | } |