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