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>
35 #include <arpa/inet.h>
36 #include <linux/connector.h>
37 #include <linux/hyperv.h>
38 #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 struct sockaddr_nl addr;
83 static int in_hand_shake = 1;
85 static char *os_name = "";
86 static char *os_major = "";
87 static char *os_minor = "";
88 static char *processor_arch;
89 static char *os_build;
90 static char *os_version;
91 static char *lic_version = "Unknown version";
92 static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
93 static struct utsname uts_buf;
96 * The location of the interface configuration file.
99 #define KVP_CONFIG_LOC "/var/lib/hyperv"
101 #define MAX_FILE_NAME 100
102 #define ENTRIES_PER_BLOCK 50
105 #define SOL_NETLINK 270
109 char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
110 char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
113 struct kvp_file_state {
116 struct kvp_record *records;
118 char fname[MAX_FILE_NAME];
121 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
123 static void kvp_acquire_lock(int pool)
125 struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
128 if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
129 syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
130 errno, strerror(errno));
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) {
141 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
142 errno, strerror(errno));
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 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
161 errno, strerror(errno));
162 kvp_release_lock(pool);
166 bytes_written = fwrite(kvp_file_info[pool].records,
167 sizeof(struct kvp_record),
168 kvp_file_info[pool].num_records, filep);
170 if (ferror(filep) || fclose(filep)) {
171 kvp_release_lock(pool);
172 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
176 kvp_release_lock(pool);
179 static void kvp_update_mem_state(int pool)
182 size_t records_read = 0;
183 struct kvp_record *record = kvp_file_info[pool].records;
184 struct kvp_record *readp;
185 int num_blocks = kvp_file_info[pool].num_blocks;
186 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
188 kvp_acquire_lock(pool);
190 filep = fopen(kvp_file_info[pool].fname, "re");
192 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
193 errno, strerror(errno));
194 kvp_release_lock(pool);
198 readp = &record[records_read];
199 records_read += fread(readp, sizeof(struct kvp_record),
200 ENTRIES_PER_BLOCK * num_blocks,
204 syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
210 * We have more data to read.
213 record = realloc(record, alloc_unit * num_blocks);
215 if (record == NULL) {
216 syslog(LOG_ERR, "malloc failed");
224 kvp_file_info[pool].num_blocks = num_blocks;
225 kvp_file_info[pool].records = record;
226 kvp_file_info[pool].num_records = records_read;
229 kvp_release_lock(pool);
231 static int kvp_file_init(void)
237 struct kvp_record *record;
238 struct kvp_record *readp;
241 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
243 if (access(KVP_CONFIG_LOC, F_OK)) {
244 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
245 syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
246 errno, strerror(errno));
251 for (i = 0; i < KVP_POOL_COUNT; i++) {
252 fname = kvp_file_info[i].fname;
255 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
256 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
262 filep = fopen(fname, "re");
268 record = malloc(alloc_unit * num_blocks);
269 if (record == NULL) {
275 readp = &record[records_read];
276 records_read += fread(readp, sizeof(struct kvp_record),
281 syslog(LOG_ERR, "Failed to read file, pool: %d",
288 * We have more data to read.
291 record = realloc(record, alloc_unit *
293 if (record == NULL) {
302 kvp_file_info[i].fd = fd;
303 kvp_file_info[i].num_blocks = num_blocks;
304 kvp_file_info[i].records = record;
305 kvp_file_info[i].num_records = records_read;
313 static int kvp_key_delete(int pool, const char *key, int key_size)
318 struct kvp_record *record;
321 * First update the in-memory state.
323 kvp_update_mem_state(pool);
325 num_records = kvp_file_info[pool].num_records;
326 record = kvp_file_info[pool].records;
328 for (i = 0; i < num_records; i++) {
329 if (memcmp(key, record[i].key, key_size))
332 * Found a match; just move the remaining
335 if (i == num_records) {
336 kvp_file_info[pool].num_records--;
337 kvp_update_file(pool);
343 for (; k < num_records; k++) {
344 strcpy(record[j].key, record[k].key);
345 strcpy(record[j].value, record[k].value);
349 kvp_file_info[pool].num_records--;
350 kvp_update_file(pool);
356 static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value,
361 struct kvp_record *record;
364 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
365 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
369 * First update the in-memory state.
371 kvp_update_mem_state(pool);
373 num_records = kvp_file_info[pool].num_records;
374 record = kvp_file_info[pool].records;
375 num_blocks = kvp_file_info[pool].num_blocks;
377 for (i = 0; i < num_records; i++) {
378 if (memcmp(key, record[i].key, key_size))
381 * Found a match; just update the value -
382 * this is the modify case.
384 memcpy(record[i].value, value, value_size);
385 kvp_update_file(pool);
390 * Need to add a new entry;
392 if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
393 /* Need to allocate a larger array for reg entries. */
394 record = realloc(record, sizeof(struct kvp_record) *
395 ENTRIES_PER_BLOCK * (num_blocks + 1));
399 kvp_file_info[pool].num_blocks++;
402 memcpy(record[i].value, value, value_size);
403 memcpy(record[i].key, key, key_size);
404 kvp_file_info[pool].records = record;
405 kvp_file_info[pool].num_records++;
406 kvp_update_file(pool);
410 static int kvp_get_value(int pool, const char *key, int key_size, char *value,
415 struct kvp_record *record;
417 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
418 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
422 * First update the in-memory state.
424 kvp_update_mem_state(pool);
426 num_records = kvp_file_info[pool].num_records;
427 record = kvp_file_info[pool].records;
429 for (i = 0; i < num_records; i++) {
430 if (memcmp(key, record[i].key, key_size))
433 * Found a match; just copy the value out.
435 memcpy(value, record[i].value, value_size);
442 static int kvp_pool_enumerate(int pool, int index, char *key, int key_size,
443 char *value, int value_size)
445 struct kvp_record *record;
448 * First update our in-memory database.
450 kvp_update_mem_state(pool);
451 record = kvp_file_info[pool].records;
453 if (index >= kvp_file_info[pool].num_records) {
457 memcpy(key, record[index].key, key_size);
458 memcpy(value, record[index].value, value_size);
463 void kvp_get_os_info(void)
469 os_version = uts_buf.release;
470 os_build = strdup(uts_buf.release);
472 os_name = uts_buf.sysname;
473 processor_arch = uts_buf.machine;
476 * The current windows host (win7) expects the build
477 * string to be of the form: x.y.z
478 * Strip additional information we may have.
480 p = strchr(os_version, '-');
485 * Parse the /etc/os-release file if present:
486 * http://www.freedesktop.org/software/systemd/man/os-release.html
488 file = fopen("/etc/os-release", "r");
490 while (fgets(buf, sizeof(buf), file)) {
493 /* Ignore comments */
497 /* Split into name=value */
498 p = strchr(buf, '=');
503 /* Remove quotes and newline; un-escape */
512 } else if (*p == '\'' || *p == '"' ||
521 if (!strcmp(buf, "NAME")) {
526 } else if (!strcmp(buf, "VERSION_ID")) {
537 /* Fallback for older RH/SUSE releases */
538 file = fopen("/etc/SuSE-release", "r");
540 goto kvp_osinfo_found;
541 file = fopen("/etc/redhat-release", "r");
543 goto kvp_osinfo_found;
546 * We don't have information about the os.
551 /* up to three lines */
552 p = fgets(buf, sizeof(buf), file);
554 p = strchr(buf, '\n');
563 p = fgets(buf, sizeof(buf), file);
565 p = strchr(buf, '\n');
574 p = fgets(buf, sizeof(buf), file);
576 p = strchr(buf, '\n');
594 * Retrieve an interface name corresponding to the specified guid.
595 * If there is a match, the function returns a pointer
596 * to the interface name and if not, a NULL is returned.
597 * If a match is found, the caller is responsible for
598 * freeing the memory.
601 static char *kvp_get_if_name(char *guid)
604 struct dirent *entry;
607 char *if_name = NULL;
609 char *kvp_net_dir = "/sys/class/net/";
612 dir = opendir(kvp_net_dir);
616 snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
617 q = dev_id + strlen(kvp_net_dir);
619 while ((entry = readdir(dir)) != NULL) {
621 * Set the state for the next pass.
624 strcat(dev_id, entry->d_name);
625 strcat(dev_id, "/device/device_id");
627 file = fopen(dev_id, "r");
631 p = fgets(buf, sizeof(buf), file);
637 if (!strcmp(p, guid)) {
639 * Found the guid match; return the interface
640 * name. The caller will free the memory.
642 if_name = strdup(entry->d_name);
655 * Retrieve the MAC address given the interface name.
658 static char *kvp_if_name_to_mac(char *if_name)
665 char *mac_addr = NULL;
667 snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
668 if_name, "/address");
670 file = fopen(addr_file, "r");
674 p = fgets(buf, sizeof(buf), file);
679 for (i = 0; i < strlen(p); i++)
680 p[i] = toupper(p[i]);
681 mac_addr = strdup(p);
690 * Retrieve the interface name given tha MAC address.
693 static char *kvp_mac_to_if_name(char *mac)
696 struct dirent *entry;
699 char *if_name = NULL;
701 char *kvp_net_dir = "/sys/class/net/";
705 dir = opendir(kvp_net_dir);
709 snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
710 q = dev_id + strlen(kvp_net_dir);
712 while ((entry = readdir(dir)) != NULL) {
714 * Set the state for the next pass.
718 strcat(dev_id, entry->d_name);
719 strcat(dev_id, "/address");
721 file = fopen(dev_id, "r");
725 p = fgets(buf, sizeof(buf), file);
731 for (i = 0; i < strlen(p); i++)
732 p[i] = toupper(p[i]);
734 if (!strcmp(p, mac)) {
736 * Found the MAC match; return the interface
737 * name. The caller will free the memory.
739 if_name = strdup(entry->d_name);
752 static void kvp_process_ipconfig_file(char *cmd,
753 char *config_buf, int len,
754 int element_size, int offset)
762 * First execute the command.
764 file = popen(cmd, "r");
769 memset(config_buf, 0, len);
770 while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
771 if ((len - strlen(config_buf)) < (element_size + 1))
778 strcat(config_buf, p);
779 strcat(config_buf, ";");
784 static void kvp_get_ipconfig_info(char *if_name,
785 struct hv_kvp_ipaddr_value *buffer)
793 * Get the address of default gateway (ipv4).
795 sprintf(cmd, "%s %s", "ip route show dev", if_name);
796 strcat(cmd, " | awk '/default/ {print $3 }'");
799 * Execute the command to gather gateway info.
801 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
802 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
805 * Get the address of default gateway (ipv6).
807 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
808 strcat(cmd, " | awk '/default/ {print $3 }'");
811 * Execute the command to gather gateway info (ipv6).
813 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
814 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
818 * Gather the DNS state.
819 * Since there is no standard way to get this information
820 * across various distributions of interest; we just invoke
821 * an external script that needs to be ported across distros
824 * Following is the expected format of the information from the script:
826 * ipaddr1 (nameserver1)
827 * ipaddr2 (nameserver2)
832 sprintf(cmd, "%s", "hv_get_dns_info");
835 * Execute the command to gather DNS info.
837 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
838 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
841 * Gather the DHCP state.
842 * We will gather this state by invoking an external script.
843 * The parameter to the script is the interface name.
844 * Here is the expected output:
846 * Enabled: DHCP enabled.
849 sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
851 file = popen(cmd, "r");
855 p = fgets(dhcp_info, sizeof(dhcp_info), file);
861 if (!strncmp(p, "Enabled", 7))
862 buffer->dhcp_enabled = 1;
864 buffer->dhcp_enabled = 0;
870 static unsigned int hweight32(unsigned int *w)
872 unsigned int res = *w - ((*w >> 1) & 0x55555555);
873 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
874 res = (res + (res >> 4)) & 0x0F0F0F0F;
875 res = res + (res >> 8);
876 return (res + (res >> 16)) & 0x000000FF;
879 static int kvp_process_ip_address(void *addrp,
880 int family, char *buffer,
881 int length, int *offset)
883 struct sockaddr_in *addr;
884 struct sockaddr_in6 *addr6;
889 if (family == AF_INET) {
890 addr = (struct sockaddr_in *)addrp;
891 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
892 addr_length = INET_ADDRSTRLEN;
894 addr6 = (struct sockaddr_in6 *)addrp;
895 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
896 addr_length = INET6_ADDRSTRLEN;
899 if ((length - *offset) < addr_length + 2)
902 strcpy(buffer, "inet_ntop failed\n");
912 *offset += strlen(str) + 1;
918 kvp_get_ip_info(int family, char *if_name, int op,
919 void *out_buffer, int length)
921 struct ifaddrs *ifap;
922 struct ifaddrs *curp;
927 struct hv_kvp_ipaddr_value *ip_buffer;
928 char cidr_mask[5]; /* /xyz */
933 struct sockaddr_in6 *addr6;
935 if (op == KVP_OP_ENUMERATE) {
938 ip_buffer = out_buffer;
939 buffer = (char *)ip_buffer->ip_addr;
940 ip_buffer->addr_family = 0;
943 * On entry into this function, the buffer is capable of holding the
947 if (getifaddrs(&ifap)) {
948 strcpy(buffer, "getifaddrs failed\n");
953 while (curp != NULL) {
954 if (curp->ifa_addr == NULL) {
955 curp = curp->ifa_next;
959 if ((if_name != NULL) &&
960 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
962 * We want info about a specific interface;
965 curp = curp->ifa_next;
970 * We only support two address families: AF_INET and AF_INET6.
971 * If a family value of 0 is specified, we collect both
972 * supported address families; if not we gather info on
973 * the specified address family.
975 if ((((family != 0) &&
976 (curp->ifa_addr->sa_family != family))) ||
977 (curp->ifa_flags & IFF_LOOPBACK)) {
978 curp = curp->ifa_next;
981 if ((curp->ifa_addr->sa_family != AF_INET) &&
982 (curp->ifa_addr->sa_family != AF_INET6)) {
983 curp = curp->ifa_next;
987 if (op == KVP_OP_GET_IP_INFO) {
989 * Gather info other than the IP address.
990 * IP address info will be gathered later.
992 if (curp->ifa_addr->sa_family == AF_INET) {
993 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
997 error = kvp_process_ip_address(
1007 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
1010 * Get subnet info in CIDR format.
1013 sn_str = (char *)ip_buffer->sub_net;
1014 addr6 = (struct sockaddr_in6 *)
1016 w = addr6->sin6_addr.s6_addr32;
1018 for (i = 0; i < 4; i++)
1019 weight += hweight32(&w[i]);
1021 sprintf(cidr_mask, "/%d", weight);
1022 if ((length - sn_offset) <
1023 (strlen(cidr_mask) + 1))
1027 strcpy(sn_str, cidr_mask);
1029 strcat((char *)ip_buffer->sub_net, ";");
1030 strcat(sn_str, cidr_mask);
1032 sn_offset += strlen(sn_str) + 1;
1036 * Collect other ip related configuration info.
1039 kvp_get_ipconfig_info(if_name, ip_buffer);
1043 error = kvp_process_ip_address(curp->ifa_addr,
1044 curp->ifa_addr->sa_family,
1050 curp = curp->ifa_next;
1059 static int expand_ipv6(char *addr, int type)
1062 struct in6_addr v6_addr;
1064 ret = inet_pton(AF_INET6, addr, &v6_addr);
1067 if (type == NETMASK)
1072 sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
1073 "%02x%02x:%02x%02x:%02x%02x",
1074 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
1075 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
1076 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
1077 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
1078 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
1079 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
1080 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
1081 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
1087 static int is_ipv4(char *addr)
1090 struct in_addr ipv4_addr;
1092 ret = inet_pton(AF_INET, addr, &ipv4_addr);
1099 static int parse_ip_val_buffer(char *in_buf, int *offset,
1100 char *out_buf, int out_len)
1106 * in_buf has sequence of characters that are seperated by
1107 * the character ';'. The last sequence does not have the
1108 * terminating ";" character.
1110 start = in_buf + *offset;
1112 x = strchr(start, ';');
1116 x = start + strlen(start);
1118 if (strlen(start) != 0) {
1121 * Get rid of leading spaces.
1123 while (start[i] == ' ')
1126 if ((x - start) <= out_len) {
1127 strcpy(out_buf, (start + i));
1128 *offset += (x - start) + 1;
1135 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
1139 ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
1148 static int process_ip_string(FILE *f, char *ip_string, int type)
1151 char addr[INET6_ADDRSTRLEN];
1158 memset(addr, 0, sizeof(addr));
1160 while (parse_ip_val_buffer(ip_string, &offset, addr,
1161 (MAX_IP_ADDR_SIZE * 2))) {
1164 if (is_ipv4(addr)) {
1167 snprintf(str, sizeof(str), "%s", "IPADDR");
1170 snprintf(str, sizeof(str), "%s", "NETMASK");
1173 snprintf(str, sizeof(str), "%s", "GATEWAY");
1176 snprintf(str, sizeof(str), "%s", "DNS");
1181 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1182 } else if (type == GATEWAY && i == 0) {
1185 snprintf(sub_str, sizeof(sub_str), "%d", i++);
1189 } else if (expand_ipv6(addr, type)) {
1192 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
1195 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
1198 snprintf(str, sizeof(str), "%s",
1202 snprintf(str, sizeof(str), "%s", "DNS");
1207 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
1208 } else if (j == 0) {
1211 snprintf(sub_str, sizeof(sub_str), "_%d", j++);
1214 return HV_INVALIDARG;
1217 error = kvp_write_file(f, str, sub_str, addr);
1220 memset(addr, 0, sizeof(addr));
1226 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
1235 * Set the configuration for the specified interface with
1236 * the information provided. Since there is no standard
1237 * way to configure an interface, we will have an external
1238 * script that does the job of configuring the interface and
1239 * flushing the configuration.
1241 * The parameters passed to this external script are:
1242 * 1. A configuration file that has the specified configuration.
1244 * We will embed the name of the interface in the configuration
1245 * file: ifcfg-ethx (where ethx is the interface name).
1247 * The information provided here may be more than what is needed
1248 * in a given distro to configure the interface and so are free
1249 * ignore information that may not be relevant.
1251 * Here is the format of the ip configuration file:
1254 * DEVICE=interface name
1255 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
1256 * or "none" if no boot-time protocol should be used)
1260 * IPADDRx=ipaddry (where y = x + 1)
1263 * NETMASKx=netmasky (where y = x + 1)
1266 * GATEWAYx=ipaddry (where y = x + 1)
1268 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
1270 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
1271 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
1274 * The host can specify multiple ipv4 and ipv6 addresses to be
1275 * configured for the interface. Furthermore, the configuration
1276 * needs to be persistent. A subsequent GET call on the interface
1277 * is expected to return the configuration that is set via the SET
1281 snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
1282 "/ifcfg-", if_name);
1284 file = fopen(if_file, "w");
1287 syslog(LOG_ERR, "Failed to open config file; error: %d %s",
1288 errno, strerror(errno));
1293 * First write out the MAC address.
1296 mac_addr = kvp_if_name_to_mac(if_name);
1297 if (mac_addr == NULL) {
1302 error = kvp_write_file(file, "HWADDR", "", mac_addr);
1307 error = kvp_write_file(file, "DEVICE", "", if_name);
1311 if (new_val->dhcp_enabled) {
1312 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1322 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1328 * Write the configuration for ipaddress, netmask, gateway and
1332 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1336 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1340 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1344 error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
1352 * Now that we have populated the configuration file,
1353 * invoke the external script to do its magic.
1356 snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
1358 syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
1359 cmd, errno, strerror(errno));
1365 syslog(LOG_ERR, "Failed to write config file");
1372 kvp_get_domain_name(char *buffer, int length)
1374 struct addrinfo hints, *info ;
1377 gethostname(buffer, length);
1378 memset(&hints, 0, sizeof(hints));
1379 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1380 hints.ai_socktype = SOCK_STREAM;
1381 hints.ai_flags = AI_CANONNAME;
1383 error = getaddrinfo(buffer, NULL, &hints, &info);
1385 snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
1386 error, gai_strerror(error));
1389 snprintf(buffer, length, "%s", info->ai_canonname);
1394 netlink_send(int fd, struct cn_msg *msg)
1396 struct nlmsghdr nlh = { .nlmsg_type = NLMSG_DONE };
1398 struct msghdr message;
1399 struct iovec iov[2];
1401 size = sizeof(struct cn_msg) + msg->len;
1403 nlh.nlmsg_pid = getpid();
1404 nlh.nlmsg_len = NLMSG_LENGTH(size);
1406 iov[0].iov_base = &nlh;
1407 iov[0].iov_len = sizeof(nlh);
1409 iov[1].iov_base = msg;
1410 iov[1].iov_len = size;
1412 memset(&message, 0, sizeof(message));
1413 message.msg_name = &addr;
1414 message.msg_namelen = sizeof(addr);
1415 message.msg_iov = iov;
1416 message.msg_iovlen = 2;
1418 return sendmsg(fd, &message, 0);
1421 void print_usage(char *argv[])
1423 fprintf(stderr, "Usage: %s [options]\n"
1425 " -n, --no-daemon stay in foreground, don't daemonize\n"
1426 " -h, --help print this help\n", argv[0]);
1429 int main(int argc, char *argv[])
1431 int fd, len, nl_group;
1433 struct cn_msg *message;
1435 struct nlmsghdr *incoming_msg;
1436 struct cn_msg *incoming_cn_msg;
1437 struct hv_kvp_msg *hv_msg;
1444 struct hv_kvp_ipaddr_value *kvp_ip_val;
1445 char *kvp_recv_buffer;
1446 size_t kvp_recv_buffer_len;
1447 int daemonize = 1, long_index = 0, opt;
1449 static struct option long_options[] = {
1450 {"help", no_argument, 0, 'h' },
1451 {"no-daemon", no_argument, 0, 'n' },
1455 while ((opt = getopt_long(argc, argv, "hn", long_options,
1456 &long_index)) != -1) {
1468 if (daemonize && daemon(1, 0))
1471 openlog("KVP", 0, LOG_USER);
1472 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1474 kvp_recv_buffer_len = NLMSG_LENGTH(0) + sizeof(struct cn_msg) + sizeof(struct hv_kvp_msg);
1475 kvp_recv_buffer = calloc(1, kvp_recv_buffer_len);
1476 if (!kvp_recv_buffer) {
1477 syslog(LOG_ERR, "Failed to allocate netlink buffer");
1481 * Retrieve OS release information.
1485 * Cache Fully Qualified Domain Name because getaddrinfo takes an
1486 * unpredictable amount of time to finish.
1488 kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
1490 if (kvp_file_init()) {
1491 syslog(LOG_ERR, "Failed to initialize the pools");
1495 fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
1497 syslog(LOG_ERR, "netlink socket creation failed; error: %d %s", errno,
1501 addr.nl_family = AF_NETLINK;
1507 error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
1509 syslog(LOG_ERR, "bind failed; error: %d %s", errno, strerror(errno));
1513 nl_group = CN_KVP_IDX;
1515 if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) {
1516 syslog(LOG_ERR, "setsockopt failed; error: %d %s", errno, strerror(errno));
1522 * Register ourselves with the kernel.
1524 message = (struct cn_msg *)kvp_recv_buffer;
1525 message->id.idx = CN_KVP_IDX;
1526 message->id.val = CN_KVP_VAL;
1528 hv_msg = (struct hv_kvp_msg *)message->data;
1529 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1531 message->len = sizeof(struct hv_kvp_msg);
1533 len = netlink_send(fd, message);
1535 syslog(LOG_ERR, "netlink_send failed; error: %d %s", errno, strerror(errno));
1543 struct sockaddr *addr_p = (struct sockaddr *) &addr;
1544 socklen_t addr_l = sizeof(addr);
1545 pfd.events = POLLIN;
1548 if (poll(&pfd, 1, -1) < 0) {
1549 syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1550 if (errno == EINVAL) {
1558 len = recvfrom(fd, kvp_recv_buffer, kvp_recv_buffer_len, 0,
1562 int saved_errno = errno;
1563 syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
1564 addr.nl_pid, errno, strerror(errno));
1566 if (saved_errno == ENOBUFS) {
1567 syslog(LOG_ERR, "receive error: ignored");
1576 syslog(LOG_WARNING, "Received packet from untrusted pid:%u",
1581 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
1583 if (incoming_msg->nlmsg_type != NLMSG_DONE)
1586 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
1587 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1590 * We will use the KVP header information to pass back
1591 * the error from this daemon. So, first copy the state
1592 * and set the error code to success.
1594 op = hv_msg->kvp_hdr.operation;
1595 pool = hv_msg->kvp_hdr.pool;
1596 hv_msg->error = HV_S_OK;
1598 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1600 * Driver is registering with us; stash away the version
1604 p = (char *)hv_msg->body.kvp_register.version;
1605 lic_version = malloc(strlen(p) + 1);
1607 strcpy(lic_version, p);
1608 syslog(LOG_INFO, "KVP LIC Version: %s",
1611 syslog(LOG_ERR, "malloc failed");
1617 case KVP_OP_GET_IP_INFO:
1618 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1620 kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1622 if (if_name == NULL) {
1624 * We could not map the mac address to an
1625 * interface name; return error.
1627 hv_msg->error = HV_E_FAIL;
1630 error = kvp_get_ip_info(
1631 0, if_name, KVP_OP_GET_IP_INFO,
1633 (MAX_IP_ADDR_SIZE * 2));
1636 hv_msg->error = error;
1641 case KVP_OP_SET_IP_INFO:
1642 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1643 if_name = kvp_get_if_name(
1644 (char *)kvp_ip_val->adapter_id);
1645 if (if_name == NULL) {
1647 * We could not map the guid to an
1648 * interface name; return error.
1650 hv_msg->error = HV_GUID_NOTFOUND;
1653 error = kvp_set_ip_info(if_name, kvp_ip_val);
1655 hv_msg->error = error;
1661 if (kvp_key_add_or_modify(pool,
1662 hv_msg->body.kvp_set.data.key,
1663 hv_msg->body.kvp_set.data.key_size,
1664 hv_msg->body.kvp_set.data.value,
1665 hv_msg->body.kvp_set.data.value_size))
1666 hv_msg->error = HV_S_CONT;
1670 if (kvp_get_value(pool,
1671 hv_msg->body.kvp_set.data.key,
1672 hv_msg->body.kvp_set.data.key_size,
1673 hv_msg->body.kvp_set.data.value,
1674 hv_msg->body.kvp_set.data.value_size))
1675 hv_msg->error = HV_S_CONT;
1679 if (kvp_key_delete(pool,
1680 hv_msg->body.kvp_delete.key,
1681 hv_msg->body.kvp_delete.key_size))
1682 hv_msg->error = HV_S_CONT;
1689 if (op != KVP_OP_ENUMERATE)
1693 * If the pool is KVP_POOL_AUTO, dynamically generate
1694 * both the key and the value; if not read from the
1697 if (pool != KVP_POOL_AUTO) {
1698 if (kvp_pool_enumerate(pool,
1699 hv_msg->body.kvp_enum_data.index,
1700 hv_msg->body.kvp_enum_data.data.key,
1701 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1702 hv_msg->body.kvp_enum_data.data.value,
1703 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1704 hv_msg->error = HV_S_CONT;
1708 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1709 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1710 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1712 switch (hv_msg->body.kvp_enum_data.index) {
1713 case FullyQualifiedDomainName:
1714 strcpy(key_value, full_domain_name);
1715 strcpy(key_name, "FullyQualifiedDomainName");
1717 case IntegrationServicesVersion:
1718 strcpy(key_name, "IntegrationServicesVersion");
1719 strcpy(key_value, lic_version);
1721 case NetworkAddressIPv4:
1722 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1723 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1724 strcpy(key_name, "NetworkAddressIPv4");
1726 case NetworkAddressIPv6:
1727 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1728 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1729 strcpy(key_name, "NetworkAddressIPv6");
1732 strcpy(key_value, os_build);
1733 strcpy(key_name, "OSBuildNumber");
1736 strcpy(key_value, os_name);
1737 strcpy(key_name, "OSName");
1739 case OSMajorVersion:
1740 strcpy(key_value, os_major);
1741 strcpy(key_name, "OSMajorVersion");
1743 case OSMinorVersion:
1744 strcpy(key_value, os_minor);
1745 strcpy(key_name, "OSMinorVersion");
1748 strcpy(key_value, os_version);
1749 strcpy(key_name, "OSVersion");
1751 case ProcessorArchitecture:
1752 strcpy(key_value, processor_arch);
1753 strcpy(key_name, "ProcessorArchitecture");
1756 hv_msg->error = HV_S_CONT;
1760 * Send the value back to the kernel. The response is
1761 * already in the receive buffer. Update the cn_msg header to
1762 * reflect the key value that has been added to the message
1766 incoming_cn_msg->id.idx = CN_KVP_IDX;
1767 incoming_cn_msg->id.val = CN_KVP_VAL;
1768 incoming_cn_msg->ack = 0;
1769 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
1771 len = netlink_send(fd, incoming_cn_msg);
1773 int saved_errno = errno;
1774 syslog(LOG_ERR, "net_link send failed; error: %d %s", errno,
1777 if (saved_errno == ENOMEM || saved_errno == ENOBUFS) {
1778 syslog(LOG_ERR, "send error: ignored");