1 /*
2 * An implementation of key value pair (KVP) functionality for Linux.
3 *
4 *
5 * Copyright (C) 2010, Novell, Inc.
6 * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
16 * details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 */
23
24
25 #include <sys/poll.h>
26 #include <sys/utsname.h>
27 #include <stdbool.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <unistd.h>
31 #include <string.h>
32 #include <ctype.h>
33 #include <errno.h>
34 #include <arpa/inet.h>
35 #include <linux/hyperv.h>
36 #include <ifaddrs.h>
37 #include <netdb.h>
38 #include <syslog.h>
39 #include <sys/stat.h>
40 #include <fcntl.h>
41 #include <dirent.h>
42 #include <net/if.h>
43 #include <limits.h>
44 #include <getopt.h>
45
46 /*
47 * KVP protocol: The user mode component first registers with the
48 * kernel component. Subsequently, the kernel component requests, data
49 * for the specified keys. In response to this message the user mode component
50 * fills in the value corresponding to the specified key. We overload the
51 * sequence field in the cn_msg header to define our KVP message types.
52 *
53 * We use this infrastructure for also supporting queries from user mode
54 * application for state that may be maintained in the KVP kernel component.
55 *
56 */
57
58
59 enum key_index {
60 FullyQualifiedDomainName = 0,
61 IntegrationServicesVersion, /*This key is serviced in the kernel*/
62 NetworkAddressIPv4,
63 NetworkAddressIPv6,
64 OSBuildNumber,
65 OSName,
66 OSMajorVersion,
67 OSMinorVersion,
68 OSVersion,
69 ProcessorArchitecture
70 };
71
72
73 enum {
74 IPADDR = 0,
75 NETMASK,
76 GATEWAY,
77 DNS
78 };
79
80 enum {
81 IPV4 = 1,
82 IPV6,
83 IP_TYPE_MAX
84 };
85
86 static int in_hand_shake;
87 static int debug;
88
89 static char *os_name = "";
90 static char *os_major = "";
91 static char *os_minor = "";
92 static char *processor_arch;
93 static char *os_build;
94 static char *os_version;
95 static char *lic_version = "Unknown version";
96 static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
97 static struct utsname uts_buf;
98
99 /*
100 * The location of the interface configuration file.
101 */
102
103 #define KVP_CONFIG_LOC "/var/lib/hyperv"
104
105 #ifndef KVP_SCRIPTS_PATH
106 #define KVP_SCRIPTS_PATH "/usr/libexec/hypervkvpd/"
107 #endif
108
109 #define KVP_NET_DIR "/sys/class/net/"
110
111 #define MAX_FILE_NAME 100
112 #define ENTRIES_PER_BLOCK 50
113 /*
114 * Change this entry if the number of addresses increases in future
115 */
116 #define MAX_IP_ENTRIES 64
117 #define OUTSTR_BUF_SIZE ((INET6_ADDRSTRLEN + 1) * MAX_IP_ENTRIES)
118
119 struct kvp_record {
120 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
121 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
122 };
123
124 struct kvp_file_state {
125 int fd;
126 int num_blocks;
127 struct kvp_record *records;
128 int num_records;
129 char fname[MAX_FILE_NAME];
130 };
131
132 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
133
kvp_acquire_lock(int pool)134 static void kvp_acquire_lock(int pool)
135 {
136 struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
137 fl.l_pid = getpid();
138
139 if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
140 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
141 errno, strerror(errno));
142 exit(EXIT_FAILURE);
143 }
144 }
145
kvp_release_lock(int pool)146 static void kvp_release_lock(int pool)
147 {
148 struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
149 fl.l_pid = getpid();
150
151 if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
152 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
153 errno, strerror(errno));
154 exit(EXIT_FAILURE);
155 }
156 }
157
kvp_update_file(int pool)158 static void kvp_update_file(int pool)
159 {
160 FILE *filep;
161
162 /*
163 * We are going to write our in-memory registry out to
164 * disk; acquire the lock first.
165 */
166 kvp_acquire_lock(pool);
167
168 filep = fopen(kvp_file_info[pool].fname, "we");
169 if (!filep) {
170 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
171 errno, strerror(errno));
172 kvp_release_lock(pool);
173 exit(EXIT_FAILURE);
174 }
175
176 fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record),
177 kvp_file_info[pool].num_records, filep);
178
179 if (ferror(filep) || fclose(filep)) {
180 kvp_release_lock(pool);
181 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
182 exit(EXIT_FAILURE);
183 }
184
185 kvp_release_lock(pool);
186 }
187
kvp_dump_initial_pools(int pool)188 static void kvp_dump_initial_pools(int pool)
189 {
190 int i;
191
192 syslog(LOG_DEBUG, "===Start dumping the contents of pool %d ===\n",
193 pool);
194
195 for (i = 0; i < kvp_file_info[pool].num_records; i++)
196 syslog(LOG_DEBUG, "pool: %d, %d/%d key=%s val=%s\n",
197 pool, i + 1, kvp_file_info[pool].num_records,
198 kvp_file_info[pool].records[i].key,
199 kvp_file_info[pool].records[i].value);
200 }
201
kvp_update_mem_state(int pool)202 static void kvp_update_mem_state(int pool)
203 {
204 FILE *filep;
205 size_t records_read = 0;
206 struct kvp_record *record = kvp_file_info[pool].records;
207 struct kvp_record *readp;
208 int num_blocks = kvp_file_info[pool].num_blocks;
209 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
210
211 kvp_acquire_lock(pool);
212
213 filep = fopen(kvp_file_info[pool].fname, "re");
214 if (!filep) {
215 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
216 errno, strerror(errno));
217 kvp_release_lock(pool);
218 exit(EXIT_FAILURE);
219 }
220 for (;;) {
221 readp = &record[records_read];
222 records_read += fread(readp, sizeof(struct kvp_record),
223 ENTRIES_PER_BLOCK * num_blocks - records_read,
224 filep);
225
226 if (ferror(filep)) {
227 syslog(LOG_ERR,
228 "Failed to read file, pool: %d; error: %d %s",
229 pool, errno, strerror(errno));
230 kvp_release_lock(pool);
231 exit(EXIT_FAILURE);
232 }
233
234 if (!feof(filep)) {
235 /*
236 * We have more data to read.
237 */
238 num_blocks++;
239 record = realloc(record, alloc_unit * num_blocks);
240
241 if (record == NULL) {
242 syslog(LOG_ERR, "malloc failed");
243 kvp_release_lock(pool);
244 exit(EXIT_FAILURE);
245 }
246 continue;
247 }
248 break;
249 }
250
251 kvp_file_info[pool].num_blocks = num_blocks;
252 kvp_file_info[pool].records = record;
253 kvp_file_info[pool].num_records = records_read;
254
255 fclose(filep);
256 kvp_release_lock(pool);
257 }
258
kvp_file_init(void)259 static int kvp_file_init(void)
260 {
261 int fd;
262 char *fname;
263 int i;
264 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
265
266 if (access(KVP_CONFIG_LOC, F_OK)) {
267 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
268 syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
269 errno, strerror(errno));
270 exit(EXIT_FAILURE);
271 }
272 }
273
274 for (i = 0; i < KVP_POOL_COUNT; i++) {
275 fname = kvp_file_info[i].fname;
276 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
277 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
278
279 if (fd == -1)
280 return 1;
281
282 kvp_file_info[i].fd = fd;
283 kvp_file_info[i].num_blocks = 1;
284 kvp_file_info[i].records = malloc(alloc_unit);
285 if (kvp_file_info[i].records == NULL)
286 return 1;
287 kvp_file_info[i].num_records = 0;
288 kvp_update_mem_state(i);
289 if (debug)
290 kvp_dump_initial_pools(i);
291 }
292
293 return 0;
294 }
295
kvp_key_delete(int pool,const __u8 * key,int key_size)296 static int kvp_key_delete(int pool, const __u8 *key, int key_size)
297 {
298 int i;
299 int j, k;
300 int num_records;
301 struct kvp_record *record;
302
303 /*
304 * First update the in-memory state.
305 */
306 kvp_update_mem_state(pool);
307
308 num_records = kvp_file_info[pool].num_records;
309 record = kvp_file_info[pool].records;
310
311 for (i = 0; i < num_records; i++) {
312 if (memcmp(key, record[i].key, key_size))
313 continue;
314 /*
315 * Found a match; just move the remaining
316 * entries up.
317 */
318 if (debug)
319 syslog(LOG_DEBUG, "%s: deleting the KVP: pool=%d key=%s val=%s",
320 __func__, pool, record[i].key, record[i].value);
321 if (i == (num_records - 1)) {
322 kvp_file_info[pool].num_records--;
323 kvp_update_file(pool);
324 return 0;
325 }
326
327 j = i;
328 k = j + 1;
329 for (; k < num_records; k++) {
330 strcpy(record[j].key, record[k].key);
331 strcpy(record[j].value, record[k].value);
332 j++;
333 }
334
335 kvp_file_info[pool].num_records--;
336 kvp_update_file(pool);
337 return 0;
338 }
339
340 if (debug)
341 syslog(LOG_DEBUG, "%s: could not delete KVP: pool=%d key=%s. Record not found",
342 __func__, pool, key);
343
344 return 1;
345 }
346
kvp_key_add_or_modify(int pool,const __u8 * key,int key_size,const __u8 * value,int value_size)347 static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size,
348 const __u8 *value, int value_size)
349 {
350 struct kvp_record *record;
351 int num_records;
352 int num_blocks;
353 int i;
354
355 if (debug)
356 syslog(LOG_DEBUG, "%s: got a KVP: pool=%d key=%s val=%s",
357 __func__, pool, key, value);
358
359 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
360 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) {
361 syslog(LOG_ERR, "%s: Too long key or value: key=%s, val=%s",
362 __func__, key, value);
363
364 if (debug)
365 syslog(LOG_DEBUG, "%s: Too long key or value: pool=%d, key=%s, val=%s",
366 __func__, pool, key, value);
367 return 1;
368 }
369
370 /*
371 * First update the in-memory state.
372 */
373 kvp_update_mem_state(pool);
374
375 num_records = kvp_file_info[pool].num_records;
376 record = kvp_file_info[pool].records;
377 num_blocks = kvp_file_info[pool].num_blocks;
378
379 for (i = 0; i < num_records; i++) {
380 if (memcmp(key, record[i].key, key_size))
381 continue;
382 /*
383 * Found a match; just update the value -
384 * this is the modify case.
385 */
386 memcpy(record[i].value, value, value_size);
387 kvp_update_file(pool);
388 if (debug)
389 syslog(LOG_DEBUG, "%s: updated: pool=%d key=%s val=%s",
390 __func__, pool, key, value);
391 return 0;
392 }
393
394 /*
395 * Need to add a new entry;
396 */
397 if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
398 /* Need to allocate a larger array for reg entries. */
399 record = realloc(record, sizeof(struct kvp_record) *
400 ENTRIES_PER_BLOCK * (num_blocks + 1));
401
402 if (!record) {
403 syslog(LOG_ERR, "%s: Memory alloc failure", __func__);
404 return 1;
405 }
406 kvp_file_info[pool].num_blocks++;
407
408 }
409 memcpy(record[i].value, value, value_size);
410 memcpy(record[i].key, key, key_size);
411 kvp_file_info[pool].records = record;
412 kvp_file_info[pool].num_records++;
413
414 if (debug)
415 syslog(LOG_DEBUG, "%s: added: pool=%d key=%s val=%s",
416 __func__, pool, key, value);
417
418 kvp_update_file(pool);
419 return 0;
420 }
421
kvp_get_value(int pool,const __u8 * key,int key_size,__u8 * value,int value_size)422 static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value,
423 int value_size)
424 {
425 int i;
426 int num_records;
427 struct kvp_record *record;
428
429 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
430 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
431 return 1;
432
433 /*
434 * First update the in-memory state.
435 */
436 kvp_update_mem_state(pool);
437
438 num_records = kvp_file_info[pool].num_records;
439 record = kvp_file_info[pool].records;
440
441 for (i = 0; i < num_records; i++) {
442 if (memcmp(key, record[i].key, key_size))
443 continue;
444 /*
445 * Found a match; just copy the value out.
446 */
447 memcpy(value, record[i].value, value_size);
448 return 0;
449 }
450
451 return 1;
452 }
453
kvp_pool_enumerate(int pool,int index,__u8 * key,int key_size,__u8 * value,int value_size)454 static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
455 __u8 *value, int value_size)
456 {
457 struct kvp_record *record;
458
459 /*
460 * First update our in-memory database.
461 */
462 kvp_update_mem_state(pool);
463 record = kvp_file_info[pool].records;
464
465 if (index >= kvp_file_info[pool].num_records) {
466 return 1;
467 }
468
469 memcpy(key, record[index].key, key_size);
470 memcpy(value, record[index].value, value_size);
471 return 0;
472 }
473
474
kvp_get_os_info(void)475 void kvp_get_os_info(void)
476 {
477 FILE *file;
478 char *p, buf[512];
479
480 uname(&uts_buf);
481 os_version = uts_buf.release;
482 os_build = strdup(uts_buf.release);
483
484 os_name = uts_buf.sysname;
485 processor_arch = uts_buf.machine;
486
487 /*
488 * The current windows host (win7) expects the build
489 * string to be of the form: x.y.z
490 * Strip additional information we may have.
491 */
492 p = strchr(os_version, '-');
493 if (p)
494 *p = '\0';
495
496 /*
497 * Parse the /etc/os-release file if present:
498 * https://www.freedesktop.org/software/systemd/man/os-release.html
499 */
500 file = fopen("/etc/os-release", "r");
501 if (file != NULL) {
502 while (fgets(buf, sizeof(buf), file)) {
503 char *value, *q;
504
505 /* Ignore comments */
506 if (buf[0] == '#')
507 continue;
508
509 /* Split into name=value */
510 p = strchr(buf, '=');
511 if (!p)
512 continue;
513 *p++ = 0;
514
515 /* Remove quotes and newline; un-escape */
516 value = p;
517 q = p;
518 while (*p) {
519 if (*p == '\\') {
520 ++p;
521 if (!*p)
522 break;
523 *q++ = *p++;
524 } else if (*p == '\'' || *p == '"' ||
525 *p == '\n') {
526 ++p;
527 } else {
528 *q++ = *p++;
529 }
530 }
531 *q = 0;
532
533 if (!strcmp(buf, "NAME")) {
534 p = strdup(value);
535 if (!p)
536 break;
537 os_name = p;
538 } else if (!strcmp(buf, "VERSION_ID")) {
539 p = strdup(value);
540 if (!p)
541 break;
542 os_major = p;
543 }
544 }
545 fclose(file);
546 return;
547 }
548
549 /* Fallback for older RH/SUSE releases */
550 file = fopen("/etc/SuSE-release", "r");
551 if (file != NULL)
552 goto kvp_osinfo_found;
553 file = fopen("/etc/redhat-release", "r");
554 if (file != NULL)
555 goto kvp_osinfo_found;
556
557 /*
558 * We don't have information about the os.
559 */
560 return;
561
562 kvp_osinfo_found:
563 /* up to three lines */
564 p = fgets(buf, sizeof(buf), file);
565 if (p) {
566 p = strchr(buf, '\n');
567 if (p)
568 *p = '\0';
569 p = strdup(buf);
570 if (!p)
571 goto done;
572 os_name = p;
573
574 /* second line */
575 p = fgets(buf, sizeof(buf), file);
576 if (p) {
577 p = strchr(buf, '\n');
578 if (p)
579 *p = '\0';
580 p = strdup(buf);
581 if (!p)
582 goto done;
583 os_major = p;
584
585 /* third line */
586 p = fgets(buf, sizeof(buf), file);
587 if (p) {
588 p = strchr(buf, '\n');
589 if (p)
590 *p = '\0';
591 p = strdup(buf);
592 if (p)
593 os_minor = p;
594 }
595 }
596 }
597
598 done:
599 fclose(file);
600 return;
601 }
602
603
604
605 /*
606 * Retrieve an interface name corresponding to the specified guid.
607 * If there is a match, the function returns a pointer
608 * to the interface name and if not, a NULL is returned.
609 * If a match is found, the caller is responsible for
610 * freeing the memory.
611 */
612
kvp_get_if_name(char * guid)613 static char *kvp_get_if_name(char *guid)
614 {
615 DIR *dir;
616 struct dirent *entry;
617 FILE *file;
618 char *p, *x;
619 char *if_name = NULL;
620 char buf[256];
621 char dev_id[PATH_MAX];
622
623 dir = opendir(KVP_NET_DIR);
624 if (dir == NULL)
625 return NULL;
626
627 while ((entry = readdir(dir)) != NULL) {
628 /*
629 * Set the state for the next pass.
630 */
631 snprintf(dev_id, sizeof(dev_id), "%s%s/device/device_id",
632 KVP_NET_DIR, entry->d_name);
633
634 file = fopen(dev_id, "r");
635 if (file == NULL)
636 continue;
637
638 p = fgets(buf, sizeof(buf), file);
639 if (p) {
640 x = strchr(p, '\n');
641 if (x)
642 *x = '\0';
643
644 if (!strcmp(p, guid)) {
645 /*
646 * Found the guid match; return the interface
647 * name. The caller will free the memory.
648 */
649 if_name = strdup(entry->d_name);
650 fclose(file);
651 break;
652 }
653 }
654 fclose(file);
655 }
656
657 closedir(dir);
658 return if_name;
659 }
660
661 /*
662 * Retrieve the MAC address given the interface name.
663 */
664
kvp_if_name_to_mac(char * if_name)665 static char *kvp_if_name_to_mac(char *if_name)
666 {
667 FILE *file;
668 char *p, *x;
669 char buf[256];
670 char addr_file[PATH_MAX];
671 unsigned int i;
672 char *mac_addr = NULL;
673
674 snprintf(addr_file, sizeof(addr_file), "%s%s%s", KVP_NET_DIR,
675 if_name, "/address");
676
677 file = fopen(addr_file, "r");
678 if (file == NULL)
679 return NULL;
680
681 p = fgets(buf, sizeof(buf), file);
682 if (p) {
683 x = strchr(p, '\n');
684 if (x)
685 *x = '\0';
686 for (i = 0; i < strlen(p); i++)
687 p[i] = toupper(p[i]);
688 mac_addr = strdup(p);
689 }
690
691 fclose(file);
692 return mac_addr;
693 }
694
kvp_process_ipconfig_file(char * cmd,char * config_buf,unsigned int len,int element_size,int offset)695 static void kvp_process_ipconfig_file(char *cmd,
696 char *config_buf, unsigned int len,
697 int element_size, int offset)
698 {
699 char buf[256];
700 char *p;
701 char *x;
702 FILE *file;
703
704 /*
705 * First execute the command.
706 */
707 file = popen(cmd, "r");
708 if (file == NULL)
709 return;
710
711 if (offset == 0)
712 memset(config_buf, 0, len);
713 while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
714 if (len < strlen(config_buf) + element_size + 1)
715 break;
716
717 x = strchr(p, '\n');
718 if (x)
719 *x = '\0';
720
721 strcat(config_buf, p);
722 strcat(config_buf, ";");
723 }
724 pclose(file);
725 }
726
kvp_verify_ip_address(const void * address_string)727 static bool kvp_verify_ip_address(const void *address_string)
728 {
729 char verify_buf[sizeof(struct in6_addr)];
730
731 if (inet_pton(AF_INET, address_string, verify_buf) == 1)
732 return true;
733 if (inet_pton(AF_INET6, address_string, verify_buf) == 1)
734 return true;
735 return false;
736 }
737
kvp_extract_routes(const char * line,void ** output,size_t * remaining)738 static void kvp_extract_routes(const char *line, void **output, size_t *remaining)
739 {
740 static const char needle[] = "via ";
741 const char *match, *haystack = line;
742
743 while ((match = strstr(haystack, needle))) {
744 const char *address, *next_char;
745
746 /* Address starts after needle. */
747 address = match + strlen(needle);
748
749 /* The char following address is a space or end of line. */
750 next_char = strpbrk(address, " \t\\");
751 if (!next_char)
752 next_char = address + strlen(address) + 1;
753
754 /* Enough room for address and semicolon. */
755 if (*remaining >= (next_char - address) + 1) {
756 memcpy(*output, address, next_char - address);
757 /* Terminate string for verification. */
758 memcpy(*output + (next_char - address), "", 1);
759 if (kvp_verify_ip_address(*output)) {
760 /* Advance output buffer. */
761 *output += next_char - address;
762 *remaining -= next_char - address;
763
764 /* Each address needs a trailing semicolon. */
765 memcpy(*output, ";", 1);
766 *output += 1;
767 *remaining -= 1;
768 }
769 }
770 haystack = next_char;
771 }
772 }
773
kvp_get_gateway(void * buffer,size_t buffer_len)774 static void kvp_get_gateway(void *buffer, size_t buffer_len)
775 {
776 static const char needle[] = "default ";
777 FILE *f;
778 void *output = buffer;
779 char *line = NULL;
780 size_t alloc_size = 0, remaining = buffer_len - 1;
781 ssize_t num_chars;
782
783 /* Show route information in a single line, for each address family */
784 f = popen("ip --oneline -4 route show;ip --oneline -6 route show", "r");
785 if (!f) {
786 /* Convert buffer into C-String. */
787 memcpy(output, "", 1);
788 return;
789 }
790 while ((num_chars = getline(&line, &alloc_size, f)) > 0) {
791 /* Skip short lines. */
792 if (num_chars <= strlen(needle))
793 continue;
794 /* Skip lines without default route. */
795 if (memcmp(line, needle, strlen(needle)))
796 continue;
797 /* Remove trailing newline to simplify further parsing. */
798 if (line[num_chars - 1] == '\n')
799 line[num_chars - 1] = '\0';
800 /* Search routes after match. */
801 kvp_extract_routes(line + strlen(needle), &output, &remaining);
802 }
803 /* Convert buffer into C-String. */
804 memcpy(output, "", 1);
805 free(line);
806 pclose(f);
807 }
808
kvp_get_ipconfig_info(char * if_name,struct hv_kvp_ipaddr_value * buffer)809 static void kvp_get_ipconfig_info(char *if_name,
810 struct hv_kvp_ipaddr_value *buffer)
811 {
812 char cmd[512];
813 char dhcp_info[128];
814 char *p;
815 FILE *file;
816
817 kvp_get_gateway(buffer->gate_way, sizeof(buffer->gate_way));
818
819 /*
820 * Gather the DNS state.
821 * Since there is no standard way to get this information
822 * across various distributions of interest; we just invoke
823 * an external script that needs to be ported across distros
824 * of interest.
825 *
826 * Following is the expected format of the information from the script:
827 *
828 * ipaddr1 (nameserver1)
829 * ipaddr2 (nameserver2)
830 * .
831 * .
832 */
833
834 sprintf(cmd, "exec %s %s", KVP_SCRIPTS_PATH "hv_get_dns_info", if_name);
835
836 /*
837 * Execute the command to gather DNS info.
838 */
839 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
840 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
841
842 /*
843 * Gather the DHCP state.
844 * We will gather this state by invoking an external script.
845 * The parameter to the script is the interface name.
846 * Here is the expected output:
847 *
848 * Enabled: DHCP enabled.
849 */
850
851 sprintf(cmd, "exec %s %s", KVP_SCRIPTS_PATH "hv_get_dhcp_info", if_name);
852
853 file = popen(cmd, "r");
854 if (file == NULL)
855 return;
856
857 p = fgets(dhcp_info, sizeof(dhcp_info), file);
858 if (p == NULL) {
859 pclose(file);
860 return;
861 }
862
863 if (!strncmp(p, "Enabled", 7))
864 buffer->dhcp_enabled = 1;
865 else
866 buffer->dhcp_enabled = 0;
867
868 pclose(file);
869 }
870
871
hweight32(unsigned int * w)872 static unsigned int hweight32(unsigned int *w)
873 {
874 unsigned int res = *w - ((*w >> 1) & 0x55555555);
875 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
876 res = (res + (res >> 4)) & 0x0F0F0F0F;
877 res = res + (res >> 8);
878 return (res + (res >> 16)) & 0x000000FF;
879 }
880
kvp_process_ip_address(void * addrp,int family,char * buffer,int length,int * offset)881 static int kvp_process_ip_address(void *addrp,
882 int family, char *buffer,
883 int length, int *offset)
884 {
885 struct sockaddr_in *addr;
886 struct sockaddr_in6 *addr6;
887 int addr_length;
888 char tmp[50];
889 const char *str;
890
891 if (family == AF_INET) {
892 addr = addrp;
893 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
894 addr_length = INET_ADDRSTRLEN;
895 } else {
896 addr6 = addrp;
897 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
898 addr_length = INET6_ADDRSTRLEN;
899 }
900
901 if ((length - *offset) < addr_length + 2)
902 return HV_E_FAIL;
903 if (str == NULL) {
904 strcpy(buffer, "inet_ntop failed\n");
905 return HV_E_FAIL;
906 }
907 if (*offset == 0)
908 strcpy(buffer, tmp);
909 else {
910 strcat(buffer, ";");
911 strcat(buffer, tmp);
912 }
913
914 *offset += strlen(str) + 1;
915
916 return 0;
917 }
918
919 static int
kvp_get_ip_info(int family,char * if_name,int op,void * out_buffer,unsigned int length)920 kvp_get_ip_info(int family, char *if_name, int op,
921 void *out_buffer, unsigned int length)
922 {
923 struct ifaddrs *ifap;
924 struct ifaddrs *curp;
925 int offset = 0;
926 int sn_offset = 0;
927 int error = 0;
928 char *buffer;
929 struct hv_kvp_ipaddr_value *ip_buffer = NULL;
930 char cidr_mask[5]; /* /xyz */
931 int weight;
932 int i;
933 unsigned int *w;
934 char *sn_str;
935 struct sockaddr_in6 *addr6;
936
937 if (op == KVP_OP_ENUMERATE) {
938 buffer = out_buffer;
939 } else {
940 ip_buffer = out_buffer;
941 buffer = (char *)ip_buffer->ip_addr;
942 ip_buffer->addr_family = 0;
943 }
944 /*
945 * On entry into this function, the buffer is capable of holding the
946 * maximum key value.
947 */
948
949 if (getifaddrs(&ifap)) {
950 strcpy(buffer, "getifaddrs failed\n");
951 return HV_E_FAIL;
952 }
953
954 curp = ifap;
955 while (curp != NULL) {
956 if (curp->ifa_addr == NULL) {
957 curp = curp->ifa_next;
958 continue;
959 }
960
961 if ((if_name != NULL) &&
962 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
963 /*
964 * We want info about a specific interface;
965 * just continue.
966 */
967 curp = curp->ifa_next;
968 continue;
969 }
970
971 /*
972 * We only support two address families: AF_INET and AF_INET6.
973 * If a family value of 0 is specified, we collect both
974 * supported address families; if not we gather info on
975 * the specified address family.
976 */
977 if ((((family != 0) &&
978 (curp->ifa_addr->sa_family != family))) ||
979 (curp->ifa_flags & IFF_LOOPBACK)) {
980 curp = curp->ifa_next;
981 continue;
982 }
983 if ((curp->ifa_addr->sa_family != AF_INET) &&
984 (curp->ifa_addr->sa_family != AF_INET6)) {
985 curp = curp->ifa_next;
986 continue;
987 }
988
989 if (op == KVP_OP_GET_IP_INFO) {
990 /*
991 * Gather info other than the IP address.
992 * IP address info will be gathered later.
993 */
994 if (curp->ifa_addr->sa_family == AF_INET) {
995 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
996 /*
997 * Get subnet info.
998 */
999 error = kvp_process_ip_address(
1000 curp->ifa_netmask,
1001 AF_INET,
1002 (char *)
1003 ip_buffer->sub_net,
1004 length,
1005 &sn_offset);
1006 if (error)
1007 goto gather_ipaddr;
1008 } else {
1009 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
1010
1011 /*
1012 * Get subnet info in CIDR format.
1013 */
1014 weight = 0;
1015 sn_str = (char *)ip_buffer->sub_net;
1016 addr6 = (struct sockaddr_in6 *)
1017 curp->ifa_netmask;
1018 w = addr6->sin6_addr.s6_addr32;
1019
1020 for (i = 0; i < 4; i++)
1021 weight += hweight32(&w[i]);
1022
1023 sprintf(cidr_mask, "/%d", weight);
1024 if (length < sn_offset + strlen(cidr_mask) + 1)
1025 goto gather_ipaddr;
1026
1027 if (sn_offset == 0)
1028 strcpy(sn_str, cidr_mask);
1029 else {
1030 strcat((char *)ip_buffer->sub_net, ";");
1031 strcat(sn_str, cidr_mask);
1032 }
1033 sn_offset += strlen(sn_str) + 1;
1034 }
1035
1036 /*
1037 * Collect other ip related configuration info.
1038 */
1039
1040 kvp_get_ipconfig_info(if_name, ip_buffer);
1041 }
1042
1043 gather_ipaddr:
1044 error = kvp_process_ip_address(curp->ifa_addr,
1045 curp->ifa_addr->sa_family,
1046 buffer,
1047 length, &offset);
1048 if (error)
1049 goto getaddr_done;
1050
1051 curp = curp->ifa_next;
1052 }
1053
1054 getaddr_done:
1055 freeifaddrs(ifap);
1056 return error;
1057 }
1058
1059 /*
1060 * Retrieve the IP given the MAC address.
1061 */
kvp_mac_to_ip(struct hv_kvp_ipaddr_value * kvp_ip_val)1062 static int kvp_mac_to_ip(struct hv_kvp_ipaddr_value *kvp_ip_val)
1063 {
1064 char *mac = (char *)kvp_ip_val->adapter_id;
1065 DIR *dir;
1066 struct dirent *entry;
1067 FILE *file;
1068 char *p, *x;
1069 char *if_name = NULL;
1070 char buf[256];
1071 char dev_id[PATH_MAX];
1072 unsigned int i;
1073 int error = HV_E_FAIL;
1074
1075 dir = opendir(KVP_NET_DIR);
1076 if (dir == NULL)
1077 return HV_E_FAIL;
1078
1079 while ((entry = readdir(dir)) != NULL) {
1080 /*
1081 * Set the state for the next pass.
1082 */
1083 snprintf(dev_id, sizeof(dev_id), "%s%s/address", KVP_NET_DIR,
1084 entry->d_name);
1085
1086 file = fopen(dev_id, "r");
1087 if (file == NULL)
1088 continue;
1089
1090 p = fgets(buf, sizeof(buf), file);
1091 fclose(file);
1092 if (!p)
1093 continue;
1094
1095 x = strchr(p, '\n');
1096 if (x)
1097 *x = '\0';
1098
1099 for (i = 0; i < strlen(p); i++)
1100 p[i] = toupper(p[i]);
1101
1102 if (strcmp(p, mac))
1103 continue;
1104
1105 /*
1106 * Found the MAC match.
1107 * A NIC (e.g. VF) matching the MAC, but without IP, is skipped.
1108 */
1109 if_name = entry->d_name;
1110 if (!if_name)
1111 continue;
1112
1113 error = kvp_get_ip_info(0, if_name, KVP_OP_GET_IP_INFO,
1114 kvp_ip_val, MAX_IP_ADDR_SIZE * 2);
1115
1116 if (!error && strlen((char *)kvp_ip_val->ip_addr))
1117 break;
1118 }
1119
1120 closedir(dir);
1121 return error;
1122 }
1123
expand_ipv6(char * addr,int type)1124 static int expand_ipv6(char *addr, int type)
1125 {
1126 int ret;
1127 struct in6_addr v6_addr;
1128
1129 ret = inet_pton(AF_INET6, addr, &v6_addr);
1130
1131 if (ret != 1) {
1132 if (type == NETMASK)
1133 return 1;
1134 return 0;
1135 }
1136
1137 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1138 "%02x%02x:%02x%02x:%02x%02x",
1139 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1140 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1141 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1142 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1143 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1144 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1145 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1146 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1147
1148 return 1;
1149
1150 }
1151
is_ipv4(char * addr)1152 static int is_ipv4(char *addr)
1153 {
1154 int ret;
1155 struct in_addr ipv4_addr;
1156
1157 ret = inet_pton(AF_INET, addr, &ipv4_addr);
1158
1159 if (ret == 1)
1160 return 1;
1161 return 0;
1162 }
1163
parse_ip_val_buffer(char * in_buf,int * offset,char * out_buf,int out_len)1164 static int parse_ip_val_buffer(char *in_buf, int *offset,
1165 char *out_buf, int out_len)
1166 {
1167 char *x;
1168 char *start;
1169
1170 /*
1171 * in_buf has sequence of characters that are separated by
1172 * the character ';'. The last sequence does not have the
1173 * terminating ";" character.
1174 */
1175 start = in_buf + *offset;
1176
1177 x = strchr(start, ';');
1178 if (x)
1179 *x = 0;
1180 else
1181 x = start + strlen(start);
1182
1183 if (strlen(start) != 0) {
1184 int i = 0;
1185 /*
1186 * Get rid of leading spaces.
1187 */
1188 while (start[i] == ' ')
1189 i++;
1190
1191 if ((x - start) <= out_len) {
1192 strcpy(out_buf, (start + i));
1193 *offset += (x - start) + 1;
1194 return 1;
1195 }
1196 }
1197 return 0;
1198 }
1199
kvp_write_file(FILE * f,char * s1,char * s2,char * s3)1200 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1201 {
1202 int ret;
1203
1204 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1205
1206 if (ret < 0)
1207 return HV_E_FAIL;
1208
1209 return 0;
1210 }
1211
1212
process_ip_string(FILE * f,char * ip_string,int type)1213 static int process_ip_string(FILE *f, char *ip_string, int type)
1214 {
1215 int error = 0;
1216 char addr[INET6_ADDRSTRLEN];
1217 int i = 0;
1218 int j = 0;
1219 char str[256];
1220 char sub_str[13];
1221 int offset = 0;
1222
1223 memset(addr, 0, sizeof(addr));
1224
1225 while (parse_ip_val_buffer(ip_string, &offset, addr,
1226 (MAX_IP_ADDR_SIZE * 2))) {
1227
1228 sub_str[0] = 0;
1229 if (is_ipv4(addr)) {
1230 switch (type) {
1231 case IPADDR:
1232 snprintf(str, sizeof(str), "%s", "IPADDR");
1233 break;
1234 case NETMASK:
1235 snprintf(str, sizeof(str), "%s", "NETMASK");
1236 break;
1237 case GATEWAY:
1238 snprintf(str, sizeof(str), "%s", "GATEWAY");
1239 break;
1240 case DNS:
1241 snprintf(str, sizeof(str), "%s", "DNS");
1242 break;
1243 }
1244
1245 if (type == DNS) {
1246 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1247 } else if (type == GATEWAY && i == 0) {
1248 ++i;
1249 } else {
1250 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1251 }
1252
1253
1254 } else if (expand_ipv6(addr, type)) {
1255 switch (type) {
1256 case IPADDR:
1257 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1258 break;
1259 case NETMASK:
1260 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1261 break;
1262 case GATEWAY:
1263 snprintf(str, sizeof(str), "%s",
1264 "IPV6_DEFAULTGW");
1265 break;
1266 case DNS:
1267 snprintf(str, sizeof(str), "%s", "DNS");
1268 break;
1269 }
1270
1271 if (type == DNS) {
1272 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1273 } else if (j == 0) {
1274 ++j;
1275 } else {
1276 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1277 }
1278 } else {
1279 return HV_INVALIDARG;
1280 }
1281
1282 error = kvp_write_file(f, str, sub_str, addr);
1283 if (error)
1284 return error;
1285 memset(addr, 0, sizeof(addr));
1286 }
1287
1288 return 0;
1289 }
1290
ip_version_check(const char * input_addr)1291 int ip_version_check(const char *input_addr)
1292 {
1293 struct in6_addr addr;
1294
1295 if (inet_pton(AF_INET, input_addr, &addr))
1296 return IPV4;
1297 else if (inet_pton(AF_INET6, input_addr, &addr))
1298 return IPV6;
1299
1300 return -EINVAL;
1301 }
1302
1303 /*
1304 * Only IPv4 subnet strings needs to be converted to plen
1305 * For IPv6 the subnet is already privided in plen format
1306 */
kvp_subnet_to_plen(char * subnet_addr_str)1307 static int kvp_subnet_to_plen(char *subnet_addr_str)
1308 {
1309 int plen = 0;
1310 struct in_addr subnet_addr4;
1311
1312 /*
1313 * Convert subnet address to binary representation
1314 */
1315 if (inet_pton(AF_INET, subnet_addr_str, &subnet_addr4) == 1) {
1316 uint32_t subnet_mask = ntohl(subnet_addr4.s_addr);
1317
1318 while (subnet_mask & 0x80000000) {
1319 plen++;
1320 subnet_mask <<= 1;
1321 }
1322 } else {
1323 return -1;
1324 }
1325
1326 return plen;
1327 }
1328
process_dns_gateway_nm(FILE * f,char * ip_string,int type,int ip_sec)1329 static int process_dns_gateway_nm(FILE *f, char *ip_string, int type,
1330 int ip_sec)
1331 {
1332 char addr[INET6_ADDRSTRLEN], *output_str;
1333 int ip_offset = 0, error = 0, ip_ver;
1334 char *param_name;
1335
1336 if (type == DNS)
1337 param_name = "dns";
1338 else if (type == GATEWAY)
1339 param_name = "gateway";
1340 else
1341 return -EINVAL;
1342
1343 output_str = (char *)calloc(OUTSTR_BUF_SIZE, sizeof(char));
1344 if (!output_str)
1345 return -ENOMEM;
1346
1347 while (1) {
1348 memset(addr, 0, sizeof(addr));
1349
1350 if (!parse_ip_val_buffer(ip_string, &ip_offset, addr,
1351 (MAX_IP_ADDR_SIZE * 2)))
1352 break;
1353
1354 ip_ver = ip_version_check(addr);
1355 if (ip_ver < 0)
1356 continue;
1357
1358 if ((ip_ver == IPV4 && ip_sec == IPV4) ||
1359 (ip_ver == IPV6 && ip_sec == IPV6)) {
1360 /*
1361 * do a bound check to avoid out-of bound writes
1362 */
1363 if ((OUTSTR_BUF_SIZE - strlen(output_str)) >
1364 (strlen(addr) + 1)) {
1365 strncat(output_str, addr,
1366 OUTSTR_BUF_SIZE -
1367 strlen(output_str) - 1);
1368 strncat(output_str, ",",
1369 OUTSTR_BUF_SIZE -
1370 strlen(output_str) - 1);
1371 }
1372 } else {
1373 continue;
1374 }
1375 }
1376
1377 if (strlen(output_str)) {
1378 /*
1379 * This is to get rid of that extra comma character
1380 * in the end of the string
1381 */
1382 output_str[strlen(output_str) - 1] = '\0';
1383 error = fprintf(f, "%s=%s\n", param_name, output_str);
1384 }
1385
1386 free(output_str);
1387 return error;
1388 }
1389
process_ip_string_nm(FILE * f,char * ip_string,char * subnet,int ip_sec)1390 static int process_ip_string_nm(FILE *f, char *ip_string, char *subnet,
1391 int ip_sec)
1392 {
1393 char addr[INET6_ADDRSTRLEN];
1394 char subnet_addr[INET6_ADDRSTRLEN];
1395 int error = 0, i = 0;
1396 int ip_offset = 0, subnet_offset = 0;
1397 int plen, ip_ver;
1398
1399 memset(addr, 0, sizeof(addr));
1400 memset(subnet_addr, 0, sizeof(subnet_addr));
1401
1402 while (parse_ip_val_buffer(ip_string, &ip_offset, addr,
1403 (MAX_IP_ADDR_SIZE * 2)) &&
1404 parse_ip_val_buffer(subnet,
1405 &subnet_offset,
1406 subnet_addr,
1407 (MAX_IP_ADDR_SIZE *
1408 2))) {
1409 ip_ver = ip_version_check(addr);
1410 if (ip_ver < 0)
1411 continue;
1412
1413 if (ip_ver == IPV4 && ip_sec == IPV4)
1414 plen = kvp_subnet_to_plen((char *)subnet_addr);
1415 else if (ip_ver == IPV6 && ip_sec == IPV6)
1416 plen = atoi(subnet_addr);
1417 else
1418 continue;
1419
1420 if (plen < 0)
1421 return plen;
1422
1423 error = fprintf(f, "address%d=%s/%d\n", ++i, (char *)addr,
1424 plen);
1425 if (error < 0)
1426 return error;
1427
1428 memset(addr, 0, sizeof(addr));
1429 memset(subnet_addr, 0, sizeof(subnet_addr));
1430 }
1431
1432 return error;
1433 }
1434
kvp_set_ip_info(char * if_name,struct hv_kvp_ipaddr_value * new_val)1435 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1436 {
1437 int error = 0, ip_ver;
1438 char if_filename[PATH_MAX];
1439 char nm_filename[PATH_MAX];
1440 FILE *ifcfg_file, *nmfile;
1441 char cmd[PATH_MAX];
1442 char *mac_addr;
1443 int str_len;
1444
1445 /*
1446 * Set the configuration for the specified interface with
1447 * the information provided. Since there is no standard
1448 * way to configure an interface, we will have an external
1449 * script that does the job of configuring the interface and
1450 * flushing the configuration.
1451 *
1452 * The parameters passed to this external script are:
1453 * 1. A configuration file that has the specified configuration.
1454 *
1455 * We will embed the name of the interface in the configuration
1456 * file: ifcfg-ethx (where ethx is the interface name).
1457 *
1458 * The information provided here may be more than what is needed
1459 * in a given distro to configure the interface and so are free
1460 * ignore information that may not be relevant.
1461 *
1462 * Here is the ifcfg format of the ip configuration file:
1463 *
1464 * HWADDR=macaddr
1465 * DEVICE=interface name
1466 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1467 * or "none" if no boot-time protocol should be used)
1468 *
1469 * IPADDR0=ipaddr1
1470 * IPADDR1=ipaddr2
1471 * IPADDRx=ipaddry (where y = x + 1)
1472 *
1473 * NETMASK0=netmask1
1474 * NETMASKx=netmasky (where y = x + 1)
1475 *
1476 * GATEWAY=ipaddr1
1477 * GATEWAYx=ipaddry (where y = x + 1)
1478 *
1479 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1480 *
1481 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1482 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1483 * IPV6NETMASK.
1484 *
1485 * Here is the keyfile format of the ip configuration file:
1486 *
1487 * [ethernet]
1488 * mac-address=macaddr
1489 * [connection]
1490 * interface-name=interface name
1491 *
1492 * [ipv4]
1493 * method=<protocol> (where <protocol> is "auto" if DHCP is configured
1494 * or "manual" if no boot-time protocol should be used)
1495 *
1496 * address1=ipaddr1/plen
1497 * address2=ipaddr2/plen
1498 *
1499 * gateway=gateway1;gateway2
1500 *
1501 * dns=dns1;dns2
1502 *
1503 * [ipv6]
1504 * address1=ipaddr1/plen
1505 * address2=ipaddr2/plen
1506 *
1507 * gateway=gateway1;gateway2
1508 *
1509 * dns=dns1;dns2
1510 *
1511 * The host can specify multiple ipv4 and ipv6 addresses to be
1512 * configured for the interface. Furthermore, the configuration
1513 * needs to be persistent. A subsequent GET call on the interface
1514 * is expected to return the configuration that is set via the SET
1515 * call.
1516 */
1517
1518 /*
1519 * We are populating both ifcfg and nmconnection files
1520 */
1521 snprintf(if_filename, sizeof(if_filename), "%s%s%s", KVP_CONFIG_LOC,
1522 "/ifcfg-", if_name);
1523
1524 ifcfg_file = fopen(if_filename, "w");
1525
1526 if (!ifcfg_file) {
1527 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1528 errno, strerror(errno));
1529 return HV_E_FAIL;
1530 }
1531
1532 snprintf(nm_filename, sizeof(nm_filename), "%s%s%s%s", KVP_CONFIG_LOC,
1533 "/", if_name, ".nmconnection");
1534
1535 nmfile = fopen(nm_filename, "w");
1536
1537 if (!nmfile) {
1538 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1539 errno, strerror(errno));
1540 fclose(ifcfg_file);
1541 return HV_E_FAIL;
1542 }
1543
1544 /*
1545 * First write out the MAC address.
1546 */
1547
1548 mac_addr = kvp_if_name_to_mac(if_name);
1549 if (mac_addr == NULL) {
1550 error = HV_E_FAIL;
1551 goto setval_error;
1552 }
1553
1554 error = kvp_write_file(ifcfg_file, "HWADDR", "", mac_addr);
1555 if (error < 0)
1556 goto setmac_error;
1557
1558 error = kvp_write_file(ifcfg_file, "DEVICE", "", if_name);
1559 if (error < 0)
1560 goto setmac_error;
1561
1562 error = fprintf(nmfile, "\n[connection]\n");
1563 if (error < 0)
1564 goto setmac_error;
1565
1566 error = kvp_write_file(nmfile, "interface-name", "", if_name);
1567 if (error)
1568 goto setmac_error;
1569
1570 error = fprintf(nmfile, "\n[ethernet]\n");
1571 if (error < 0)
1572 goto setmac_error;
1573
1574 error = kvp_write_file(nmfile, "mac-address", "", mac_addr);
1575 if (error)
1576 goto setmac_error;
1577
1578 free(mac_addr);
1579
1580 /*
1581 * The dhcp_enabled flag is only for IPv4. In the case the host only
1582 * injects an IPv6 address, the flag is true, but we still need to
1583 * proceed to parse and pass the IPv6 information to the
1584 * disto-specific script hv_set_ifconfig.
1585 */
1586
1587 /*
1588 * First populate the ifcfg file format
1589 */
1590 if (new_val->dhcp_enabled) {
1591 error = kvp_write_file(ifcfg_file, "BOOTPROTO", "", "dhcp");
1592 if (error)
1593 goto setval_error;
1594 } else {
1595 error = kvp_write_file(ifcfg_file, "BOOTPROTO", "", "none");
1596 if (error)
1597 goto setval_error;
1598 }
1599
1600 error = process_ip_string(ifcfg_file, (char *)new_val->ip_addr,
1601 IPADDR);
1602 if (error)
1603 goto setval_error;
1604
1605 error = process_ip_string(ifcfg_file, (char *)new_val->sub_net,
1606 NETMASK);
1607 if (error)
1608 goto setval_error;
1609
1610 error = process_ip_string(ifcfg_file, (char *)new_val->gate_way,
1611 GATEWAY);
1612 if (error)
1613 goto setval_error;
1614
1615 error = process_ip_string(ifcfg_file, (char *)new_val->dns_addr, DNS);
1616 if (error)
1617 goto setval_error;
1618
1619 /*
1620 * Now we populate the keyfile format
1621 *
1622 * The keyfile format expects the IPv6 and IPv4 configuration in
1623 * different sections. Therefore we iterate through the list twice,
1624 * once to populate the IPv4 section and the next time for IPv6
1625 */
1626 ip_ver = IPV4;
1627 do {
1628 if (ip_ver == IPV4) {
1629 error = fprintf(nmfile, "\n[ipv4]\n");
1630 if (error < 0)
1631 goto setval_error;
1632 } else {
1633 error = fprintf(nmfile, "\n[ipv6]\n");
1634 if (error < 0)
1635 goto setval_error;
1636 }
1637
1638 /*
1639 * Write the configuration for ipaddress, netmask, gateway and
1640 * name services
1641 */
1642 error = process_ip_string_nm(nmfile, (char *)new_val->ip_addr,
1643 (char *)new_val->sub_net,
1644 ip_ver);
1645 if (error < 0)
1646 goto setval_error;
1647
1648 /*
1649 * As dhcp_enabled is only valid for ipv4, we do not set dhcp
1650 * methods for ipv6 based on dhcp_enabled flag.
1651 *
1652 * For ipv4, set method to manual only when dhcp_enabled is
1653 * false and specific ipv4 addresses are configured. If neither
1654 * dhcp_enabled is true and no ipv4 addresses are configured,
1655 * set method to 'disabled'.
1656 *
1657 * For ipv6, set method to manual when we configure ipv6
1658 * addresses. Otherwise set method to 'auto' so that SLAAC from
1659 * RA may be used.
1660 */
1661 if (ip_ver == IPV4) {
1662 if (new_val->dhcp_enabled) {
1663 error = kvp_write_file(nmfile, "method", "",
1664 "auto");
1665 if (error < 0)
1666 goto setval_error;
1667 } else if (error) {
1668 error = kvp_write_file(nmfile, "method", "",
1669 "manual");
1670 if (error < 0)
1671 goto setval_error;
1672 } else {
1673 error = kvp_write_file(nmfile, "method", "",
1674 "disabled");
1675 if (error < 0)
1676 goto setval_error;
1677 }
1678 } else if (ip_ver == IPV6) {
1679 if (error) {
1680 error = kvp_write_file(nmfile, "method", "",
1681 "manual");
1682 if (error < 0)
1683 goto setval_error;
1684 } else {
1685 error = kvp_write_file(nmfile, "method", "",
1686 "auto");
1687 if (error < 0)
1688 goto setval_error;
1689 }
1690 }
1691
1692 error = process_dns_gateway_nm(nmfile,
1693 (char *)new_val->gate_way,
1694 GATEWAY, ip_ver);
1695 if (error < 0)
1696 goto setval_error;
1697
1698 error = process_dns_gateway_nm(nmfile,
1699 (char *)new_val->dns_addr, DNS,
1700 ip_ver);
1701 if (error < 0)
1702 goto setval_error;
1703
1704 ip_ver++;
1705 } while (ip_ver < IP_TYPE_MAX);
1706
1707 fclose(nmfile);
1708 fclose(ifcfg_file);
1709
1710 /*
1711 * Now that we have populated the configuration file,
1712 * invoke the external script to do its magic.
1713 */
1714
1715 str_len = snprintf(cmd, sizeof(cmd), "exec %s %s %s",
1716 KVP_SCRIPTS_PATH "hv_set_ifconfig",
1717 if_filename, nm_filename);
1718 /*
1719 * This is a little overcautious, but it's necessary to suppress some
1720 * false warnings from gcc 8.0.1.
1721 */
1722 if (str_len <= 0 || (unsigned int)str_len >= sizeof(cmd)) {
1723 syslog(LOG_ERR, "Cmd '%s' (len=%d) may be too long",
1724 cmd, str_len);
1725 return HV_E_FAIL;
1726 }
1727
1728 if (system(cmd)) {
1729 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1730 cmd, errno, strerror(errno));
1731 return HV_E_FAIL;
1732 }
1733 return 0;
1734 setmac_error:
1735 free(mac_addr);
1736 setval_error:
1737 syslog(LOG_ERR, "Failed to write config file");
1738 fclose(ifcfg_file);
1739 fclose(nmfile);
1740 return error;
1741 }
1742
1743
1744 static void
kvp_get_domain_name(char * buffer,int length)1745 kvp_get_domain_name(char *buffer, int length)
1746 {
1747 struct addrinfo hints, *info ;
1748 int error = 0;
1749
1750 gethostname(buffer, length);
1751 memset(&hints, 0, sizeof(hints));
1752 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1753 hints.ai_socktype = SOCK_STREAM;
1754 hints.ai_flags = AI_CANONNAME;
1755
1756 error = getaddrinfo(buffer, NULL, &hints, &info);
1757 if (error != 0) {
1758 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1759 error, gai_strerror(error));
1760 return;
1761 }
1762 snprintf(buffer, length, "%s", info->ai_canonname);
1763 freeaddrinfo(info);
1764 }
1765
print_usage(char * argv[])1766 void print_usage(char *argv[])
1767 {
1768 fprintf(stderr, "Usage: %s [options]\n"
1769 "Options are:\n"
1770 " -n, --no-daemon stay in foreground, don't daemonize\n"
1771 " -d, --debug Enable debug logs(syslog debug by default)\n"
1772 " -h, --help print this help\n", argv[0]);
1773 }
1774
main(int argc,char * argv[])1775 int main(int argc, char *argv[])
1776 {
1777 int kvp_fd = -1, len;
1778 int error;
1779 struct pollfd pfd;
1780 char *p;
1781 struct hv_kvp_msg hv_msg[1];
1782 char *key_value;
1783 char *key_name;
1784 int op;
1785 int pool;
1786 char *if_name;
1787 struct hv_kvp_ipaddr_value *kvp_ip_val;
1788 int daemonize = 1, long_index = 0, opt;
1789
1790 static struct option long_options[] = {
1791 {"help", no_argument, 0, 'h' },
1792 {"no-daemon", no_argument, 0, 'n' },
1793 {"debug", no_argument, 0, 'd' },
1794 {0, 0, 0, 0 }
1795 };
1796
1797 while ((opt = getopt_long(argc, argv, "hnd", long_options,
1798 &long_index)) != -1) {
1799 switch (opt) {
1800 case 'n':
1801 daemonize = 0;
1802 break;
1803 case 'h':
1804 print_usage(argv);
1805 exit(0);
1806 case 'd':
1807 debug = 1;
1808 break;
1809 default:
1810 print_usage(argv);
1811 exit(EXIT_FAILURE);
1812 }
1813 }
1814
1815 if (daemonize && daemon(1, 0))
1816 return 1;
1817
1818 openlog("KVP", 0, LOG_USER);
1819 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1820
1821 /*
1822 * Retrieve OS release information.
1823 */
1824 kvp_get_os_info();
1825 /*
1826 * Cache Fully Qualified Domain Name because getaddrinfo takes an
1827 * unpredictable amount of time to finish.
1828 */
1829 kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
1830
1831 if (debug)
1832 syslog(LOG_INFO, "Logging debug info in syslog(debug)");
1833
1834 if (kvp_file_init()) {
1835 syslog(LOG_ERR, "Failed to initialize the pools");
1836 exit(EXIT_FAILURE);
1837 }
1838
1839 reopen_kvp_fd:
1840 if (kvp_fd != -1)
1841 close(kvp_fd);
1842 in_hand_shake = 1;
1843 kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC);
1844
1845 if (kvp_fd < 0) {
1846 syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s",
1847 errno, strerror(errno));
1848 exit(EXIT_FAILURE);
1849 }
1850
1851 /*
1852 * Register ourselves with the kernel.
1853 */
1854 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1855 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1856 if (len != sizeof(struct hv_kvp_msg)) {
1857 syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
1858 errno, strerror(errno));
1859 close(kvp_fd);
1860 exit(EXIT_FAILURE);
1861 }
1862
1863 pfd.fd = kvp_fd;
1864
1865 while (1) {
1866 pfd.events = POLLIN;
1867 pfd.revents = 0;
1868
1869 if (poll(&pfd, 1, -1) < 0) {
1870 syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1871 if (errno == EINVAL) {
1872 close(kvp_fd);
1873 exit(EXIT_FAILURE);
1874 }
1875 else
1876 continue;
1877 }
1878
1879 len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
1880
1881 if (len != sizeof(struct hv_kvp_msg)) {
1882 syslog(LOG_ERR, "read failed; error:%d %s",
1883 errno, strerror(errno));
1884 goto reopen_kvp_fd;
1885 }
1886
1887 /*
1888 * We will use the KVP header information to pass back
1889 * the error from this daemon. So, first copy the state
1890 * and set the error code to success.
1891 */
1892 op = hv_msg->kvp_hdr.operation;
1893 pool = hv_msg->kvp_hdr.pool;
1894 hv_msg->error = HV_S_OK;
1895
1896 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1897 /*
1898 * Driver is registering with us; stash away the version
1899 * information.
1900 */
1901 in_hand_shake = 0;
1902 p = (char *)hv_msg->body.kvp_register.version;
1903 lic_version = malloc(strlen(p) + 1);
1904 if (lic_version) {
1905 strcpy(lic_version, p);
1906 syslog(LOG_INFO, "KVP LIC Version: %s",
1907 lic_version);
1908 } else {
1909 syslog(LOG_ERR, "malloc failed");
1910 }
1911 continue;
1912 }
1913
1914 switch (op) {
1915 case KVP_OP_GET_IP_INFO:
1916 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1917
1918 error = kvp_mac_to_ip(kvp_ip_val);
1919
1920 if (error)
1921 hv_msg->error = error;
1922
1923 break;
1924
1925 case KVP_OP_SET_IP_INFO:
1926 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1927 if_name = kvp_get_if_name(
1928 (char *)kvp_ip_val->adapter_id);
1929 if (if_name == NULL) {
1930 /*
1931 * We could not map the guid to an
1932 * interface name; return error.
1933 */
1934 hv_msg->error = HV_GUID_NOTFOUND;
1935 break;
1936 }
1937 error = kvp_set_ip_info(if_name, kvp_ip_val);
1938 if (error)
1939 hv_msg->error = error;
1940
1941 free(if_name);
1942 break;
1943
1944 case KVP_OP_SET:
1945 if (kvp_key_add_or_modify(pool,
1946 hv_msg->body.kvp_set.data.key,
1947 hv_msg->body.kvp_set.data.key_size,
1948 hv_msg->body.kvp_set.data.value,
1949 hv_msg->body.kvp_set.data.value_size))
1950 hv_msg->error = HV_S_CONT;
1951 break;
1952
1953 case KVP_OP_GET:
1954 if (kvp_get_value(pool,
1955 hv_msg->body.kvp_set.data.key,
1956 hv_msg->body.kvp_set.data.key_size,
1957 hv_msg->body.kvp_set.data.value,
1958 hv_msg->body.kvp_set.data.value_size))
1959 hv_msg->error = HV_S_CONT;
1960 break;
1961
1962 case KVP_OP_DELETE:
1963 if (kvp_key_delete(pool,
1964 hv_msg->body.kvp_delete.key,
1965 hv_msg->body.kvp_delete.key_size))
1966 hv_msg->error = HV_S_CONT;
1967 break;
1968
1969 default:
1970 break;
1971 }
1972
1973 if (op != KVP_OP_ENUMERATE)
1974 goto kvp_done;
1975
1976 /*
1977 * If the pool is KVP_POOL_AUTO, dynamically generate
1978 * both the key and the value; if not read from the
1979 * appropriate pool.
1980 */
1981 if (pool != KVP_POOL_AUTO) {
1982 if (kvp_pool_enumerate(pool,
1983 hv_msg->body.kvp_enum_data.index,
1984 hv_msg->body.kvp_enum_data.data.key,
1985 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1986 hv_msg->body.kvp_enum_data.data.value,
1987 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1988 hv_msg->error = HV_S_CONT;
1989 goto kvp_done;
1990 }
1991
1992 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1993 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1994
1995 switch (hv_msg->body.kvp_enum_data.index) {
1996 case FullyQualifiedDomainName:
1997 strcpy(key_value, full_domain_name);
1998 strcpy(key_name, "FullyQualifiedDomainName");
1999 break;
2000 case IntegrationServicesVersion:
2001 strcpy(key_name, "IntegrationServicesVersion");
2002 strcpy(key_value, lic_version);
2003 break;
2004 case NetworkAddressIPv4:
2005 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
2006 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
2007 strcpy(key_name, "NetworkAddressIPv4");
2008 break;
2009 case NetworkAddressIPv6:
2010 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
2011 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
2012 strcpy(key_name, "NetworkAddressIPv6");
2013 break;
2014 case OSBuildNumber:
2015 strcpy(key_value, os_build);
2016 strcpy(key_name, "OSBuildNumber");
2017 break;
2018 case OSName:
2019 strcpy(key_value, os_name);
2020 strcpy(key_name, "OSName");
2021 break;
2022 case OSMajorVersion:
2023 strcpy(key_value, os_major);
2024 strcpy(key_name, "OSMajorVersion");
2025 break;
2026 case OSMinorVersion:
2027 strcpy(key_value, os_minor);
2028 strcpy(key_name, "OSMinorVersion");
2029 break;
2030 case OSVersion:
2031 strcpy(key_value, os_version);
2032 strcpy(key_name, "OSVersion");
2033 break;
2034 case ProcessorArchitecture:
2035 strcpy(key_value, processor_arch);
2036 strcpy(key_name, "ProcessorArchitecture");
2037 break;
2038 default:
2039 hv_msg->error = HV_S_CONT;
2040 break;
2041 }
2042
2043 /*
2044 * Send the value back to the kernel. Note: the write() may
2045 * return an error due to hibernation; we can ignore the error
2046 * by resetting the dev file, i.e. closing and re-opening it.
2047 */
2048 kvp_done:
2049 len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
2050 if (len != sizeof(struct hv_kvp_msg)) {
2051 syslog(LOG_ERR, "write failed; error: %d %s", errno,
2052 strerror(errno));
2053 goto reopen_kvp_fd;
2054 }
2055 }
2056
2057 close(kvp_fd);
2058 exit(0);
2059 }
2060