2 * An implementation of key value pair (KVP) functionality for Linux.
5 * Copyright (C) 2010, Novell, Inc.
6 * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
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.
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
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.
25 #include <sys/types.h>
26 #include <sys/socket.h>
28 #include <sys/utsname.h>
29 #include <linux/types.h>
36 #include <arpa/inet.h>
37 #include <linux/connector.h>
38 #include <linux/hyperv.h>
39 #include <linux/netlink.h>
49 * KVP protocol: The user mode component first registers with the
50 * the kernel component. Subsequently, the kernel component requests, data
51 * for the specified keys. In response to this message the user mode component
52 * fills in the value corresponding to the specified key. We overload the
53 * sequence field in the cn_msg header to define our KVP message types.
55 * We use this infrastructure for also supporting queries from user mode
56 * application for state that may be maintained in the KVP kernel component.
62 FullyQualifiedDomainName = 0,
63 IntegrationServicesVersion, /*This key is serviced in the kernel*/
82 static char kvp_send_buffer[4096];
83 static char kvp_recv_buffer[4096 * 2];
84 static struct sockaddr_nl addr;
85 static int in_hand_shake = 1;
87 static char *os_name = "";
88 static char *os_major = "";
89 static char *os_minor = "";
90 static char *processor_arch;
91 static char *os_build;
92 static char *os_version;
93 static char *lic_version = "Unknown version";
94 static struct utsname uts_buf;
97 * The location of the interface configuration file.
100 #define KVP_CONFIG_LOC "/var/lib/hyperv"
102 #define MAX_FILE_NAME 100
103 #define ENTRIES_PER_BLOCK 50
106 #define SOL_NETLINK 270
110 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
111 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
114 struct kvp_file_state {
117 struct kvp_record *records;
119 char fname[MAX_FILE_NAME];
122 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
124 static void kvp_acquire_lock(int pool)
126 struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
129 if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
130 syslog(LOG_ERR, "Failed to acquire the lock pool: %d", pool);
135 static void kvp_release_lock(int pool)
137 struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
140 if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
142 syslog(LOG_ERR, "Failed to release the lock pool: %d", pool);
147 static void kvp_update_file(int pool)
150 size_t bytes_written;
153 * We are going to write our in-memory registry out to
154 * disk; acquire the lock first.
156 kvp_acquire_lock(pool);
158 filep = fopen(kvp_file_info[pool].fname, "we");
160 kvp_release_lock(pool);
161 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
165 bytes_written = fwrite(kvp_file_info[pool].records,
166 sizeof(struct kvp_record),
167 kvp_file_info[pool].num_records, filep);
169 if (ferror(filep) || fclose(filep)) {
170 kvp_release_lock(pool);
171 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
175 kvp_release_lock(pool);
178 static void kvp_update_mem_state(int pool)
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;
187 kvp_acquire_lock(pool);
189 filep = fopen(kvp_file_info[pool].fname, "re");
191 kvp_release_lock(pool);
192 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
196 readp = &record[records_read];
197 records_read += fread(readp, sizeof(struct kvp_record),
198 ENTRIES_PER_BLOCK * num_blocks,
202 syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
208 * We have more data to read.
211 record = realloc(record, alloc_unit * num_blocks);
213 if (record == NULL) {
214 syslog(LOG_ERR, "malloc failed");
222 kvp_file_info[pool].num_blocks = num_blocks;
223 kvp_file_info[pool].records = record;
224 kvp_file_info[pool].num_records = records_read;
227 kvp_release_lock(pool);
229 static int kvp_file_init(void)
235 struct kvp_record *record;
236 struct kvp_record *readp;
239 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
241 if (access(KVP_CONFIG_LOC, F_OK)) {
242 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
243 syslog(LOG_ERR, " Failed to create %s", KVP_CONFIG_LOC);
248 for (i = 0; i < KVP_POOL_COUNT; i++) {
249 fname = kvp_file_info[i].fname;
252 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
253 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
259 filep = fopen(fname, "re");
263 record = malloc(alloc_unit * num_blocks);
264 if (record == NULL) {
269 readp = &record[records_read];
270 records_read += fread(readp, sizeof(struct kvp_record),
275 syslog(LOG_ERR, "Failed to read file, pool: %d",
282 * We have more data to read.
285 record = realloc(record, alloc_unit *
287 if (record == NULL) {
295 kvp_file_info[i].fd = fd;
296 kvp_file_info[i].num_blocks = num_blocks;
297 kvp_file_info[i].records = record;
298 kvp_file_info[i].num_records = records_read;
306 static int kvp_key_delete(int pool, const char *key, int key_size)
311 struct kvp_record *record;
314 * First update the in-memory state.
316 kvp_update_mem_state(pool);
318 num_records = kvp_file_info[pool].num_records;
319 record = kvp_file_info[pool].records;
321 for (i = 0; i < num_records; i++) {
322 if (memcmp(key, record[i].key, key_size))
325 * Found a match; just move the remaining
328 if (i == num_records) {
329 kvp_file_info[pool].num_records--;
330 kvp_update_file(pool);
336 for (; k < num_records; k++) {
337 strcpy(record[j].key, record[k].key);
338 strcpy(record[j].value, record[k].value);
342 kvp_file_info[pool].num_records--;
343 kvp_update_file(pool);
349 static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value,
354 struct kvp_record *record;
357 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
358 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
362 * First update the in-memory state.
364 kvp_update_mem_state(pool);
366 num_records = kvp_file_info[pool].num_records;
367 record = kvp_file_info[pool].records;
368 num_blocks = kvp_file_info[pool].num_blocks;
370 for (i = 0; i < num_records; i++) {
371 if (memcmp(key, record[i].key, key_size))
374 * Found a match; just update the value -
375 * this is the modify case.
377 memcpy(record[i].value, value, value_size);
378 kvp_update_file(pool);
383 * Need to add a new entry;
385 if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
386 /* Need to allocate a larger array for reg entries. */
387 record = realloc(record, sizeof(struct kvp_record) *
388 ENTRIES_PER_BLOCK * (num_blocks + 1));
392 kvp_file_info[pool].num_blocks++;
395 memcpy(record[i].value, value, value_size);
396 memcpy(record[i].key, key, key_size);
397 kvp_file_info[pool].records = record;
398 kvp_file_info[pool].num_records++;
399 kvp_update_file(pool);
403 static int kvp_get_value(int pool, const char *key, int key_size, char *value,
408 struct kvp_record *record;
410 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
411 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
415 * First update the in-memory state.
417 kvp_update_mem_state(pool);
419 num_records = kvp_file_info[pool].num_records;
420 record = kvp_file_info[pool].records;
422 for (i = 0; i < num_records; i++) {
423 if (memcmp(key, record[i].key, key_size))
426 * Found a match; just copy the value out.
428 memcpy(value, record[i].value, value_size);
435 static int kvp_pool_enumerate(int pool, int index, char *key, int key_size,
436 char *value, int value_size)
438 struct kvp_record *record;
441 * First update our in-memory database.
443 kvp_update_mem_state(pool);
444 record = kvp_file_info[pool].records;
446 if (index >= kvp_file_info[pool].num_records) {
450 memcpy(key, record[index].key, key_size);
451 memcpy(value, record[index].value, value_size);
456 void kvp_get_os_info(void)
462 os_version = uts_buf.release;
463 os_build = strdup(uts_buf.release);
465 os_name = uts_buf.sysname;
466 processor_arch = uts_buf.machine;
469 * The current windows host (win7) expects the build
470 * string to be of the form: x.y.z
471 * Strip additional information we may have.
473 p = strchr(os_version, '-');
478 * Parse the /etc/os-release file if present:
479 * http://www.freedesktop.org/software/systemd/man/os-release.html
481 file = fopen("/etc/os-release", "r");
483 while (fgets(buf, sizeof(buf), file)) {
486 /* Ignore comments */
490 /* Split into name=value */
491 p = strchr(buf, '=');
496 /* Remove quotes and newline; un-escape */
505 } else if (*p == '\'' || *p == '"' ||
514 if (!strcmp(buf, "NAME")) {
519 } else if (!strcmp(buf, "VERSION_ID")) {
530 /* Fallback for older RH/SUSE releases */
531 file = fopen("/etc/SuSE-release", "r");
533 goto kvp_osinfo_found;
534 file = fopen("/etc/redhat-release", "r");
536 goto kvp_osinfo_found;
539 * We don't have information about the os.
544 /* up to three lines */
545 p = fgets(buf, sizeof(buf), file);
547 p = strchr(buf, '\n');
556 p = fgets(buf, sizeof(buf), file);
558 p = strchr(buf, '\n');
567 p = fgets(buf, sizeof(buf), file);
569 p = strchr(buf, '\n');
587 * Retrieve an interface name corresponding to the specified guid.
588 * If there is a match, the function returns a pointer
589 * to the interface name and if not, a NULL is returned.
590 * If a match is found, the caller is responsible for
591 * freeing the memory.
594 static char *kvp_get_if_name(char *guid)
597 struct dirent *entry;
600 char *if_name = NULL;
602 char *kvp_net_dir = "/sys/class/net/";
605 dir = opendir(kvp_net_dir);
609 snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
610 q = dev_id + strlen(kvp_net_dir);
612 while ((entry = readdir(dir)) != NULL) {
614 * Set the state for the next pass.
617 strcat(dev_id, entry->d_name);
618 strcat(dev_id, "/device/device_id");
620 file = fopen(dev_id, "r");
624 p = fgets(buf, sizeof(buf), file);
630 if (!strcmp(p, guid)) {
632 * Found the guid match; return the interface
633 * name. The caller will free the memory.
635 if_name = strdup(entry->d_name);
648 * Retrieve the MAC address given the interface name.
651 static char *kvp_if_name_to_mac(char *if_name)
658 char *mac_addr = NULL;
660 snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
661 if_name, "/address");
663 file = fopen(addr_file, "r");
667 p = fgets(buf, sizeof(buf), file);
672 for (i = 0; i < strlen(p); i++)
673 p[i] = toupper(p[i]);
674 mac_addr = strdup(p);
683 * Retrieve the interface name given tha MAC address.
686 static char *kvp_mac_to_if_name(char *mac)
689 struct dirent *entry;
692 char *if_name = NULL;
694 char *kvp_net_dir = "/sys/class/net/";
698 dir = opendir(kvp_net_dir);
702 snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
703 q = dev_id + strlen(kvp_net_dir);
705 while ((entry = readdir(dir)) != NULL) {
707 * Set the state for the next pass.
711 strcat(dev_id, entry->d_name);
712 strcat(dev_id, "/address");
714 file = fopen(dev_id, "r");
718 p = fgets(buf, sizeof(buf), file);
724 for (i = 0; i < strlen(p); i++)
725 p[i] = toupper(p[i]);
727 if (!strcmp(p, mac)) {
729 * Found the MAC match; return the interface
730 * name. The caller will free the memory.
732 if_name = strdup(entry->d_name);
745 static void kvp_process_ipconfig_file(char *cmd,
746 char *config_buf, int len,
747 int element_size, int offset)
755 * First execute the command.
757 file = popen(cmd, "r");
762 memset(config_buf, 0, len);
763 while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
764 if ((len - strlen(config_buf)) < (element_size + 1))
769 strcat(config_buf, p);
770 strcat(config_buf, ";");
775 static void kvp_get_ipconfig_info(char *if_name,
776 struct hv_kvp_ipaddr_value *buffer)
784 * Get the address of default gateway (ipv4).
786 sprintf(cmd, "%s %s", "ip route show dev", if_name);
787 strcat(cmd, " | awk '/default/ {print $3 }'");
790 * Execute the command to gather gateway info.
792 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
793 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
796 * Get the address of default gateway (ipv6).
798 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
799 strcat(cmd, " | awk '/default/ {print $3 }'");
802 * Execute the command to gather gateway info (ipv6).
804 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
805 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
809 * Gather the DNS state.
810 * Since there is no standard way to get this information
811 * across various distributions of interest; we just invoke
812 * an external script that needs to be ported across distros
815 * Following is the expected format of the information from the script:
817 * ipaddr1 (nameserver1)
818 * ipaddr2 (nameserver2)
823 sprintf(cmd, "%s", "hv_get_dns_info");
826 * Execute the command to gather DNS info.
828 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
829 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
832 * Gather the DHCP state.
833 * We will gather this state by invoking an external script.
834 * The parameter to the script is the interface name.
835 * Here is the expected output:
837 * Enabled: DHCP enabled.
840 sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
842 file = popen(cmd, "r");
846 p = fgets(dhcp_info, sizeof(dhcp_info), file);
852 if (!strncmp(p, "Enabled", 7))
853 buffer->dhcp_enabled = 1;
855 buffer->dhcp_enabled = 0;
861 static unsigned int hweight32(unsigned int *w)
863 unsigned int res = *w - ((*w >> 1) & 0x55555555);
864 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
865 res = (res + (res >> 4)) & 0x0F0F0F0F;
866 res = res + (res >> 8);
867 return (res + (res >> 16)) & 0x000000FF;
870 static int kvp_process_ip_address(void *addrp,
871 int family, char *buffer,
872 int length, int *offset)
874 struct sockaddr_in *addr;
875 struct sockaddr_in6 *addr6;
880 if (family == AF_INET) {
881 addr = (struct sockaddr_in *)addrp;
882 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
883 addr_length = INET_ADDRSTRLEN;
885 addr6 = (struct sockaddr_in6 *)addrp;
886 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
887 addr_length = INET6_ADDRSTRLEN;
890 if ((length - *offset) < addr_length + 2)
893 strcpy(buffer, "inet_ntop failed\n");
903 *offset += strlen(str) + 1;
909 kvp_get_ip_info(int family, char *if_name, int op,
910 void *out_buffer, int length)
912 struct ifaddrs *ifap;
913 struct ifaddrs *curp;
918 struct hv_kvp_ipaddr_value *ip_buffer;
919 char cidr_mask[5]; /* /xyz */
924 struct sockaddr_in6 *addr6;
926 if (op == KVP_OP_ENUMERATE) {
929 ip_buffer = out_buffer;
930 buffer = (char *)ip_buffer->ip_addr;
931 ip_buffer->addr_family = 0;
934 * On entry into this function, the buffer is capable of holding the
938 if (getifaddrs(&ifap)) {
939 strcpy(buffer, "getifaddrs failed\n");
944 while (curp != NULL) {
945 if (curp->ifa_addr == NULL) {
946 curp = curp->ifa_next;
950 if ((if_name != NULL) &&
951 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
953 * We want info about a specific interface;
956 curp = curp->ifa_next;
961 * We only support two address families: AF_INET and AF_INET6.
962 * If a family value of 0 is specified, we collect both
963 * supported address families; if not we gather info on
964 * the specified address family.
966 if ((((family != 0) &&
967 (curp->ifa_addr->sa_family != family))) ||
968 (curp->ifa_flags & IFF_LOOPBACK)) {
969 curp = curp->ifa_next;
972 if ((curp->ifa_addr->sa_family != AF_INET) &&
973 (curp->ifa_addr->sa_family != AF_INET6)) {
974 curp = curp->ifa_next;
978 if (op == KVP_OP_GET_IP_INFO) {
980 * Gather info other than the IP address.
981 * IP address info will be gathered later.
983 if (curp->ifa_addr->sa_family == AF_INET) {
984 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
988 error = kvp_process_ip_address(
998 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
1001 * Get subnet info in CIDR format.
1004 sn_str = (char *)ip_buffer->sub_net;
1005 addr6 = (struct sockaddr_in6 *)
1007 w = addr6->sin6_addr.s6_addr32;
1009 for (i = 0; i < 4; i++)
1010 weight += hweight32(&w[i]);
1012 sprintf(cidr_mask, "/%d", weight);
1013 if ((length - sn_offset) <
1014 (strlen(cidr_mask) + 1))
1018 strcpy(sn_str, cidr_mask);
1020 strcat((char *)ip_buffer->sub_net, ";");
1021 strcat(sn_str, cidr_mask);
1023 sn_offset += strlen(sn_str) + 1;
1027 * Collect other ip related configuration info.
1030 kvp_get_ipconfig_info(if_name, ip_buffer);
1034 error = kvp_process_ip_address(curp->ifa_addr,
1035 curp->ifa_addr->sa_family,
1041 curp = curp->ifa_next;
1050 static int expand_ipv6(char *addr, int type)
1053 struct in6_addr v6_addr;
1055 ret = inet_pton(AF_INET6, addr, &v6_addr);
1058 if (type == NETMASK)
1063 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1064 "%02x%02x:%02x%02x:%02x%02x",
1065 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1066 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1067 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1068 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1069 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1070 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1071 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1072 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1078 static int is_ipv4(char *addr)
1081 struct in_addr ipv4_addr;
1083 ret = inet_pton(AF_INET, addr, &ipv4_addr);
1090 static int parse_ip_val_buffer(char *in_buf, int *offset,
1091 char *out_buf, int out_len)
1097 * in_buf has sequence of characters that are seperated by
1098 * the character ';'. The last sequence does not have the
1099 * terminating ";" character.
1101 start = in_buf + *offset;
1103 x = strchr(start, ';');
1107 x = start + strlen(start);
1109 if (strlen(start) != 0) {
1112 * Get rid of leading spaces.
1114 while (start[i] == ' ')
1117 if ((x - start) <= out_len) {
1118 strcpy(out_buf, (start + i));
1119 *offset += (x - start) + 1;
1126 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1130 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1139 static int process_ip_string(FILE *f, char *ip_string, int type)
1142 char addr[INET6_ADDRSTRLEN];
1149 memset(addr, 0, sizeof(addr));
1151 while (parse_ip_val_buffer(ip_string, &offset, addr,
1152 (MAX_IP_ADDR_SIZE * 2))) {
1155 if (is_ipv4(addr)) {
1158 snprintf(str, sizeof(str), "%s", "IPADDR");
1161 snprintf(str, sizeof(str), "%s", "NETMASK");
1164 snprintf(str, sizeof(str), "%s", "GATEWAY");
1167 snprintf(str, sizeof(str), "%s", "DNS");
1172 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1173 } else if (type == GATEWAY && i == 0) {
1176 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1180 } else if (expand_ipv6(addr, type)) {
1183 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1186 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1189 snprintf(str, sizeof(str), "%s",
1193 snprintf(str, sizeof(str), "%s", "DNS");
1198 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1199 } else if (j == 0) {
1202 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1205 return HV_INVALIDARG;
1208 error = kvp_write_file(f, str, sub_str, addr);
1211 memset(addr, 0, sizeof(addr));
1217 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1226 * Set the configuration for the specified interface with
1227 * the information provided. Since there is no standard
1228 * way to configure an interface, we will have an external
1229 * script that does the job of configuring the interface and
1230 * flushing the configuration.
1232 * The parameters passed to this external script are:
1233 * 1. A configuration file that has the specified configuration.
1235 * We will embed the name of the interface in the configuration
1236 * file: ifcfg-ethx (where ethx is the interface name).
1238 * The information provided here may be more than what is needed
1239 * in a given distro to configure the interface and so are free
1240 * ignore information that may not be relevant.
1242 * Here is the format of the ip configuration file:
1245 * DEVICE=interface name
1246 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1247 * or "none" if no boot-time protocol should be used)
1251 * IPADDRx=ipaddry (where y = x + 1)
1254 * NETMASKx=netmasky (where y = x + 1)
1257 * GATEWAYx=ipaddry (where y = x + 1)
1259 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1261 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1262 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1265 * The host can specify multiple ipv4 and ipv6 addresses to be
1266 * configured for the interface. Furthermore, the configuration
1267 * needs to be persistent. A subsequent GET call on the interface
1268 * is expected to return the configuration that is set via the SET
1272 snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1273 "/ifcfg-", if_name);
1275 file = fopen(if_file, "w");
1278 syslog(LOG_ERR, "Failed to open config file");
1283 * First write out the MAC address.
1286 mac_addr = kvp_if_name_to_mac(if_name);
1287 if (mac_addr == NULL) {
1292 error = kvp_write_file(file, "HWADDR", "", mac_addr);
1296 error = kvp_write_file(file, "DEVICE", "", if_name);
1300 if (new_val->dhcp_enabled) {
1301 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1311 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1317 * Write the configuration for ipaddress, netmask, gateway and
1321 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1325 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1329 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1333 error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1342 * Now that we have populated the configuration file,
1343 * invoke the external script to do its magic.
1346 snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
1351 syslog(LOG_ERR, "Failed to write config file");
1359 kvp_get_domain_name(char *buffer, int length)
1361 struct addrinfo hints, *info ;
1364 gethostname(buffer, length);
1365 memset(&hints, 0, sizeof(hints));
1366 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1367 hints.ai_socktype = SOCK_STREAM;
1368 hints.ai_flags = AI_CANONNAME;
1370 error = getaddrinfo(buffer, NULL, &hints, &info);
1372 strcpy(buffer, "getaddrinfo failed\n");
1375 strcpy(buffer, info->ai_canonname);
1381 netlink_send(int fd, struct cn_msg *msg)
1383 struct nlmsghdr *nlh;
1385 struct msghdr message;
1387 struct iovec iov[2];
1389 size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
1391 nlh = (struct nlmsghdr *)buffer;
1393 nlh->nlmsg_pid = getpid();
1394 nlh->nlmsg_type = NLMSG_DONE;
1395 nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
1396 nlh->nlmsg_flags = 0;
1398 iov[0].iov_base = nlh;
1399 iov[0].iov_len = sizeof(*nlh);
1401 iov[1].iov_base = msg;
1402 iov[1].iov_len = size;
1404 memset(&message, 0, sizeof(message));
1405 message.msg_name = &addr;
1406 message.msg_namelen = sizeof(addr);
1407 message.msg_iov = iov;
1408 message.msg_iovlen = 2;
1410 return sendmsg(fd, &message, 0);
1415 int fd, len, nl_group;
1417 struct cn_msg *message;
1419 struct nlmsghdr *incoming_msg;
1420 struct cn_msg *incoming_cn_msg;
1421 struct hv_kvp_msg *hv_msg;
1428 struct hv_kvp_ipaddr_value *kvp_ip_val;
1431 openlog("KVP", 0, LOG_USER);
1432 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1434 * Retrieve OS release information.
1438 if (kvp_file_init()) {
1439 syslog(LOG_ERR, "Failed to initialize the pools");
1443 fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
1445 syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
1448 addr.nl_family = AF_NETLINK;
1454 error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
1456 syslog(LOG_ERR, "bind failed; error:%d", error);
1460 nl_group = CN_KVP_IDX;
1461 setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group));
1463 * Register ourselves with the kernel.
1465 message = (struct cn_msg *)kvp_send_buffer;
1466 message->id.idx = CN_KVP_IDX;
1467 message->id.val = CN_KVP_VAL;
1469 hv_msg = (struct hv_kvp_msg *)message->data;
1470 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1472 message->len = sizeof(struct hv_kvp_msg);
1474 len = netlink_send(fd, message);
1476 syslog(LOG_ERR, "netlink_send failed; error:%d", len);
1484 struct sockaddr *addr_p = (struct sockaddr *) &addr;
1485 socklen_t addr_l = sizeof(addr);
1486 pfd.events = POLLIN;
1490 len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
1494 syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
1495 addr.nl_pid, errno, strerror(errno));
1501 syslog(LOG_WARNING, "Received packet from untrusted pid:%u",
1506 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
1508 if (incoming_msg->nlmsg_type != NLMSG_DONE)
1511 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
1512 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1515 * We will use the KVP header information to pass back
1516 * the error from this daemon. So, first copy the state
1517 * and set the error code to success.
1519 op = hv_msg->kvp_hdr.operation;
1520 pool = hv_msg->kvp_hdr.pool;
1521 hv_msg->error = HV_S_OK;
1523 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1525 * Driver is registering with us; stash away the version
1529 p = (char *)hv_msg->body.kvp_register.version;
1530 lic_version = malloc(strlen(p) + 1);
1532 strcpy(lic_version, p);
1533 syslog(LOG_INFO, "KVP LIC Version: %s",
1536 syslog(LOG_ERR, "malloc failed");
1542 case KVP_OP_GET_IP_INFO:
1543 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1545 kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1547 if (if_name == NULL) {
1549 * We could not map the mac address to an
1550 * interface name; return error.
1552 hv_msg->error = HV_E_FAIL;
1555 error = kvp_get_ip_info(
1556 0, if_name, KVP_OP_GET_IP_INFO,
1558 (MAX_IP_ADDR_SIZE * 2));
1561 hv_msg->error = error;
1566 case KVP_OP_SET_IP_INFO:
1567 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1568 if_name = kvp_get_if_name(
1569 (char *)kvp_ip_val->adapter_id);
1570 if (if_name == NULL) {
1572 * We could not map the guid to an
1573 * interface name; return error.
1575 hv_msg->error = HV_GUID_NOTFOUND;
1578 error = kvp_set_ip_info(if_name, kvp_ip_val);
1580 hv_msg->error = error;
1586 if (kvp_key_add_or_modify(pool,
1587 hv_msg->body.kvp_set.data.key,
1588 hv_msg->body.kvp_set.data.key_size,
1589 hv_msg->body.kvp_set.data.value,
1590 hv_msg->body.kvp_set.data.value_size))
1591 hv_msg->error = HV_S_CONT;
1595 if (kvp_get_value(pool,
1596 hv_msg->body.kvp_set.data.key,
1597 hv_msg->body.kvp_set.data.key_size,
1598 hv_msg->body.kvp_set.data.value,
1599 hv_msg->body.kvp_set.data.value_size))
1600 hv_msg->error = HV_S_CONT;
1604 if (kvp_key_delete(pool,
1605 hv_msg->body.kvp_delete.key,
1606 hv_msg->body.kvp_delete.key_size))
1607 hv_msg->error = HV_S_CONT;
1614 if (op != KVP_OP_ENUMERATE)
1618 * If the pool is KVP_POOL_AUTO, dynamically generate
1619 * both the key and the value; if not read from the
1622 if (pool != KVP_POOL_AUTO) {
1623 if (kvp_pool_enumerate(pool,
1624 hv_msg->body.kvp_enum_data.index,
1625 hv_msg->body.kvp_enum_data.data.key,
1626 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1627 hv_msg->body.kvp_enum_data.data.value,
1628 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1629 hv_msg->error = HV_S_CONT;
1633 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1634 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1635 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1637 switch (hv_msg->body.kvp_enum_data.index) {
1638 case FullyQualifiedDomainName:
1639 kvp_get_domain_name(key_value,
1640 HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1641 strcpy(key_name, "FullyQualifiedDomainName");
1643 case IntegrationServicesVersion:
1644 strcpy(key_name, "IntegrationServicesVersion");
1645 strcpy(key_value, lic_version);
1647 case NetworkAddressIPv4:
1648 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1649 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1650 strcpy(key_name, "NetworkAddressIPv4");
1652 case NetworkAddressIPv6:
1653 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1654 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1655 strcpy(key_name, "NetworkAddressIPv6");
1658 strcpy(key_value, os_build);
1659 strcpy(key_name, "OSBuildNumber");
1662 strcpy(key_value, os_name);
1663 strcpy(key_name, "OSName");
1665 case OSMajorVersion:
1666 strcpy(key_value, os_major);
1667 strcpy(key_name, "OSMajorVersion");
1669 case OSMinorVersion:
1670 strcpy(key_value, os_minor);
1671 strcpy(key_name, "OSMinorVersion");
1674 strcpy(key_value, os_version);
1675 strcpy(key_name, "OSVersion");
1677 case ProcessorArchitecture:
1678 strcpy(key_value, processor_arch);
1679 strcpy(key_name, "ProcessorArchitecture");
1682 hv_msg->error = HV_S_CONT;
1686 * Send the value back to the kernel. The response is
1687 * already in the receive buffer. Update the cn_msg header to
1688 * reflect the key value that has been added to the message
1692 incoming_cn_msg->id.idx = CN_KVP_IDX;
1693 incoming_cn_msg->id.val = CN_KVP_VAL;
1694 incoming_cn_msg->ack = 0;
1695 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
1697 len = netlink_send(fd, incoming_cn_msg);
1699 syslog(LOG_ERR, "net_link send failed; error:%d", len);