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; error: %d %s", pool,
131 errno, strerror(errno));
136 static void kvp_release_lock(int pool)
138 struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
141 if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
142 syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
143 errno, strerror(errno));
148 static void kvp_update_file(int pool)
151 size_t bytes_written;
154 * We are going to write our in-memory registry out to
155 * disk; acquire the lock first.
157 kvp_acquire_lock(pool);
159 filep = fopen(kvp_file_info[pool].fname, "we");
161 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
162 errno, strerror(errno));
163 kvp_release_lock(pool);
167 bytes_written = fwrite(kvp_file_info[pool].records,
168 sizeof(struct kvp_record),
169 kvp_file_info[pool].num_records, filep);
171 if (ferror(filep) || fclose(filep)) {
172 kvp_release_lock(pool);
173 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
177 kvp_release_lock(pool);
180 static void kvp_update_mem_state(int pool)
183 size_t records_read = 0;
184 struct kvp_record *record = kvp_file_info[pool].records;
185 struct kvp_record *readp;
186 int num_blocks = kvp_file_info[pool].num_blocks;
187 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
189 kvp_acquire_lock(pool);
191 filep = fopen(kvp_file_info[pool].fname, "re");
193 syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
194 errno, strerror(errno));
195 kvp_release_lock(pool);
199 readp = &record[records_read];
200 records_read += fread(readp, sizeof(struct kvp_record),
201 ENTRIES_PER_BLOCK * num_blocks,
205 syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
211 * We have more data to read.
214 record = realloc(record, alloc_unit * num_blocks);
216 if (record == NULL) {
217 syslog(LOG_ERR, "malloc failed");
225 kvp_file_info[pool].num_blocks = num_blocks;
226 kvp_file_info[pool].records = record;
227 kvp_file_info[pool].num_records = records_read;
230 kvp_release_lock(pool);
232 static int kvp_file_init(void)
238 struct kvp_record *record;
239 struct kvp_record *readp;
242 int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
244 if (access(KVP_CONFIG_LOC, F_OK)) {
245 if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
246 syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
247 errno, strerror(errno));
252 for (i = 0; i < KVP_POOL_COUNT; i++) {
253 fname = kvp_file_info[i].fname;
256 sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
257 fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
263 filep = fopen(fname, "re");
269 record = malloc(alloc_unit * num_blocks);
270 if (record == NULL) {
276 readp = &record[records_read];
277 records_read += fread(readp, sizeof(struct kvp_record),
282 syslog(LOG_ERR, "Failed to read file, pool: %d",
289 * We have more data to read.
292 record = realloc(record, alloc_unit *
294 if (record == NULL) {
303 kvp_file_info[i].fd = fd;
304 kvp_file_info[i].num_blocks = num_blocks;
305 kvp_file_info[i].records = record;
306 kvp_file_info[i].num_records = records_read;
314 static int kvp_key_delete(int pool, const char *key, int key_size)
319 struct kvp_record *record;
322 * First update the in-memory state.
324 kvp_update_mem_state(pool);
326 num_records = kvp_file_info[pool].num_records;
327 record = kvp_file_info[pool].records;
329 for (i = 0; i < num_records; i++) {
330 if (memcmp(key, record[i].key, key_size))
333 * Found a match; just move the remaining
336 if (i == num_records) {
337 kvp_file_info[pool].num_records--;
338 kvp_update_file(pool);
344 for (; k < num_records; k++) {
345 strcpy(record[j].key, record[k].key);
346 strcpy(record[j].value, record[k].value);
350 kvp_file_info[pool].num_records--;
351 kvp_update_file(pool);
357 static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value,
362 struct kvp_record *record;
365 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
366 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
370 * First update the in-memory state.
372 kvp_update_mem_state(pool);
374 num_records = kvp_file_info[pool].num_records;
375 record = kvp_file_info[pool].records;
376 num_blocks = kvp_file_info[pool].num_blocks;
378 for (i = 0; i < num_records; i++) {
379 if (memcmp(key, record[i].key, key_size))
382 * Found a match; just update the value -
383 * this is the modify case.
385 memcpy(record[i].value, value, value_size);
386 kvp_update_file(pool);
391 * Need to add a new entry;
393 if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
394 /* Need to allocate a larger array for reg entries. */
395 record = realloc(record, sizeof(struct kvp_record) *
396 ENTRIES_PER_BLOCK * (num_blocks + 1));
400 kvp_file_info[pool].num_blocks++;
403 memcpy(record[i].value, value, value_size);
404 memcpy(record[i].key, key, key_size);
405 kvp_file_info[pool].records = record;
406 kvp_file_info[pool].num_records++;
407 kvp_update_file(pool);
411 static int kvp_get_value(int pool, const char *key, int key_size, char *value,
416 struct kvp_record *record;
418 if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
419 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
423 * First update the in-memory state.
425 kvp_update_mem_state(pool);
427 num_records = kvp_file_info[pool].num_records;
428 record = kvp_file_info[pool].records;
430 for (i = 0; i < num_records; i++) {
431 if (memcmp(key, record[i].key, key_size))
434 * Found a match; just copy the value out.
436 memcpy(value, record[i].value, value_size);
443 static int kvp_pool_enumerate(int pool, int index, char *key, int key_size,
444 char *value, int value_size)
446 struct kvp_record *record;
449 * First update our in-memory database.
451 kvp_update_mem_state(pool);
452 record = kvp_file_info[pool].records;
454 if (index >= kvp_file_info[pool].num_records) {
458 memcpy(key, record[index].key, key_size);
459 memcpy(value, record[index].value, value_size);
464 void kvp_get_os_info(void)
470 os_version = uts_buf.release;
471 os_build = strdup(uts_buf.release);
473 os_name = uts_buf.sysname;
474 processor_arch = uts_buf.machine;
477 * The current windows host (win7) expects the build
478 * string to be of the form: x.y.z
479 * Strip additional information we may have.
481 p = strchr(os_version, '-');
486 * Parse the /etc/os-release file if present:
487 * http://www.freedesktop.org/software/systemd/man/os-release.html
489 file = fopen("/etc/os-release", "r");
491 while (fgets(buf, sizeof(buf), file)) {
494 /* Ignore comments */
498 /* Split into name=value */
499 p = strchr(buf, '=');
504 /* Remove quotes and newline; un-escape */
513 } else if (*p == '\'' || *p == '"' ||
522 if (!strcmp(buf, "NAME")) {
527 } else if (!strcmp(buf, "VERSION_ID")) {
538 /* Fallback for older RH/SUSE releases */
539 file = fopen("/etc/SuSE-release", "r");
541 goto kvp_osinfo_found;
542 file = fopen("/etc/redhat-release", "r");
544 goto kvp_osinfo_found;
547 * We don't have information about the os.
552 /* up to three lines */
553 p = fgets(buf, sizeof(buf), file);
555 p = strchr(buf, '\n');
564 p = fgets(buf, sizeof(buf), file);
566 p = strchr(buf, '\n');
575 p = fgets(buf, sizeof(buf), file);
577 p = strchr(buf, '\n');
595 * Retrieve an interface name corresponding to the specified guid.
596 * If there is a match, the function returns a pointer
597 * to the interface name and if not, a NULL is returned.
598 * If a match is found, the caller is responsible for
599 * freeing the memory.
602 static char *kvp_get_if_name(char *guid)
605 struct dirent *entry;
608 char *if_name = NULL;
610 char *kvp_net_dir = "/sys/class/net/";
613 dir = opendir(kvp_net_dir);
617 snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
618 q = dev_id + strlen(kvp_net_dir);
620 while ((entry = readdir(dir)) != NULL) {
622 * Set the state for the next pass.
625 strcat(dev_id, entry->d_name);
626 strcat(dev_id, "/device/device_id");
628 file = fopen(dev_id, "r");
632 p = fgets(buf, sizeof(buf), file);
638 if (!strcmp(p, guid)) {
640 * Found the guid match; return the interface
641 * name. The caller will free the memory.
643 if_name = strdup(entry->d_name);
656 * Retrieve the MAC address given the interface name.
659 static char *kvp_if_name_to_mac(char *if_name)
666 char *mac_addr = NULL;
668 snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
669 if_name, "/address");
671 file = fopen(addr_file, "r");
675 p = fgets(buf, sizeof(buf), file);
680 for (i = 0; i < strlen(p); i++)
681 p[i] = toupper(p[i]);
682 mac_addr = strdup(p);
691 * Retrieve the interface name given tha MAC address.
694 static char *kvp_mac_to_if_name(char *mac)
697 struct dirent *entry;
700 char *if_name = NULL;
702 char *kvp_net_dir = "/sys/class/net/";
706 dir = opendir(kvp_net_dir);
710 snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
711 q = dev_id + strlen(kvp_net_dir);
713 while ((entry = readdir(dir)) != NULL) {
715 * Set the state for the next pass.
719 strcat(dev_id, entry->d_name);
720 strcat(dev_id, "/address");
722 file = fopen(dev_id, "r");
726 p = fgets(buf, sizeof(buf), file);
732 for (i = 0; i < strlen(p); i++)
733 p[i] = toupper(p[i]);
735 if (!strcmp(p, mac)) {
737 * Found the MAC match; return the interface
738 * name. The caller will free the memory.
740 if_name = strdup(entry->d_name);
753 static void kvp_process_ipconfig_file(char *cmd,
754 char *config_buf, int len,
755 int element_size, int offset)
763 * First execute the command.
765 file = popen(cmd, "r");
770 memset(config_buf, 0, len);
771 while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
772 if ((len - strlen(config_buf)) < (element_size + 1))
779 strcat(config_buf, p);
780 strcat(config_buf, ";");
785 static void kvp_get_ipconfig_info(char *if_name,
786 struct hv_kvp_ipaddr_value *buffer)
794 * Get the address of default gateway (ipv4).
796 sprintf(cmd, "%s %s", "ip route show dev", if_name);
797 strcat(cmd, " | awk '/default/ {print $3 }'");
800 * Execute the command to gather gateway info.
802 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
803 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
806 * Get the address of default gateway (ipv6).
808 sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name);
809 strcat(cmd, " | awk '/default/ {print $3 }'");
812 * Execute the command to gather gateway info (ipv6).
814 kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
815 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
819 * Gather the DNS state.
820 * Since there is no standard way to get this information
821 * across various distributions of interest; we just invoke
822 * an external script that needs to be ported across distros
825 * Following is the expected format of the information from the script:
827 * ipaddr1 (nameserver1)
828 * ipaddr2 (nameserver2)
833 sprintf(cmd, "%s", "hv_get_dns_info");
836 * Execute the command to gather DNS info.
838 kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
839 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
842 * Gather the DHCP state.
843 * We will gather this state by invoking an external script.
844 * The parameter to the script is the interface name.
845 * Here is the expected output:
847 * Enabled: DHCP enabled.
850 sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
852 file = popen(cmd, "r");
856 p = fgets(dhcp_info, sizeof(dhcp_info), file);
862 if (!strncmp(p, "Enabled", 7))
863 buffer->dhcp_enabled = 1;
865 buffer->dhcp_enabled = 0;
871 static unsigned int hweight32(unsigned int *w)
873 unsigned int res = *w - ((*w >> 1) & 0x55555555);
874 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
875 res = (res + (res >> 4)) & 0x0F0F0F0F;
876 res = res + (res >> 8);
877 return (res + (res >> 16)) & 0x000000FF;
880 static int kvp_process_ip_address(void *addrp,
881 int family, char *buffer,
882 int length, int *offset)
884 struct sockaddr_in *addr;
885 struct sockaddr_in6 *addr6;
890 if (family == AF_INET) {
891 addr = (struct sockaddr_in *)addrp;
892 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
893 addr_length = INET_ADDRSTRLEN;
895 addr6 = (struct sockaddr_in6 *)addrp;
896 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
897 addr_length = INET6_ADDRSTRLEN;
900 if ((length - *offset) < addr_length + 2)
903 strcpy(buffer, "inet_ntop failed\n");
913 *offset += strlen(str) + 1;
919 kvp_get_ip_info(int family, char *if_name, int op,
920 void *out_buffer, int length)
922 struct ifaddrs *ifap;
923 struct ifaddrs *curp;
928 struct hv_kvp_ipaddr_value *ip_buffer;
929 char cidr_mask[5]; /* /xyz */
934 struct sockaddr_in6 *addr6;
936 if (op == KVP_OP_ENUMERATE) {
939 ip_buffer = out_buffer;
940 buffer = (char *)ip_buffer->ip_addr;
941 ip_buffer->addr_family = 0;
944 * On entry into this function, the buffer is capable of holding the
948 if (getifaddrs(&ifap)) {
949 strcpy(buffer, "getifaddrs failed\n");
954 while (curp != NULL) {
955 if (curp->ifa_addr == NULL) {
956 curp = curp->ifa_next;
960 if ((if_name != NULL) &&
961 (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
963 * We want info about a specific interface;
966 curp = curp->ifa_next;
971 * We only support two address families: AF_INET and AF_INET6.
972 * If a family value of 0 is specified, we collect both
973 * supported address families; if not we gather info on
974 * the specified address family.
976 if ((((family != 0) &&
977 (curp->ifa_addr->sa_family != family))) ||
978 (curp->ifa_flags & IFF_LOOPBACK)) {
979 curp = curp->ifa_next;
982 if ((curp->ifa_addr->sa_family != AF_INET) &&
983 (curp->ifa_addr->sa_family != AF_INET6)) {
984 curp = curp->ifa_next;
988 if (op == KVP_OP_GET_IP_INFO) {
990 * Gather info other than the IP address.
991 * IP address info will be gathered later.
993 if (curp->ifa_addr->sa_family == AF_INET) {
994 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
998 error = kvp_process_ip_address(
1008 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
1011 * Get subnet info in CIDR format.
1014 sn_str = (char *)ip_buffer->sub_net;
1015 addr6 = (struct sockaddr_in6 *)
1017 w = addr6->sin6_addr.s6_addr32;
1019 for (i = 0; i < 4; i++)
1020 weight += hweight32(&w[i]);
1022 sprintf(cidr_mask, "/%d", weight);
1023 if ((length - sn_offset) <
1024 (strlen(cidr_mask) + 1))
1028 strcpy(sn_str, cidr_mask);
1030 strcat(sn_str, cidr_mask);
1031 strcat((char *)ip_buffer->sub_net, ";");
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);
1306 error = kvp_write_file(file, "DEVICE", "", if_name);
1310 if (new_val->dhcp_enabled) {
1311 error = kvp_write_file(file, "BOOTPROTO", "", "dhcp");
1321 error = kvp_write_file(file, "BOOTPROTO", "", "none");
1327 * Write the configuration for ipaddress, netmask, gateway and
1331 error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
1335 error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
1339 error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
1343 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);
1361 syslog(LOG_ERR, "Failed to write config file");
1369 kvp_get_domain_name(char *buffer, int length)
1371 struct addrinfo hints, *info ;
1374 gethostname(buffer, length);
1375 memset(&hints, 0, sizeof(hints));
1376 hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
1377 hints.ai_socktype = SOCK_STREAM;
1378 hints.ai_flags = AI_CANONNAME;
1380 error = getaddrinfo(buffer, NULL, &hints, &info);
1382 strcpy(buffer, "getaddrinfo failed\n");
1385 strcpy(buffer, info->ai_canonname);
1391 netlink_send(int fd, struct cn_msg *msg)
1393 struct nlmsghdr *nlh;
1395 struct msghdr message;
1397 struct iovec iov[2];
1399 size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
1401 nlh = (struct nlmsghdr *)buffer;
1403 nlh->nlmsg_pid = getpid();
1404 nlh->nlmsg_type = NLMSG_DONE;
1405 nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
1406 nlh->nlmsg_flags = 0;
1408 iov[0].iov_base = nlh;
1409 iov[0].iov_len = sizeof(*nlh);
1411 iov[1].iov_base = msg;
1412 iov[1].iov_len = size;
1414 memset(&message, 0, sizeof(message));
1415 message.msg_name = &addr;
1416 message.msg_namelen = sizeof(addr);
1417 message.msg_iov = iov;
1418 message.msg_iovlen = 2;
1420 return sendmsg(fd, &message, 0);
1425 int fd, len, nl_group;
1427 struct cn_msg *message;
1429 struct nlmsghdr *incoming_msg;
1430 struct cn_msg *incoming_cn_msg;
1431 struct hv_kvp_msg *hv_msg;
1438 struct hv_kvp_ipaddr_value *kvp_ip_val;
1441 openlog("KVP", 0, LOG_USER);
1442 syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
1444 * Retrieve OS release information.
1448 if (kvp_file_init()) {
1449 syslog(LOG_ERR, "Failed to initialize the pools");
1453 fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
1455 syslog(LOG_ERR, "netlink socket creation failed; error: %d %s", errno,
1459 addr.nl_family = AF_NETLINK;
1465 error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
1467 syslog(LOG_ERR, "bind failed; error: %d %s", errno, strerror(errno));
1471 nl_group = CN_KVP_IDX;
1473 if (setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group)) < 0) {
1474 syslog(LOG_ERR, "setsockopt failed; error: %d %s", errno, strerror(errno));
1480 * Register ourselves with the kernel.
1482 message = (struct cn_msg *)kvp_send_buffer;
1483 message->id.idx = CN_KVP_IDX;
1484 message->id.val = CN_KVP_VAL;
1486 hv_msg = (struct hv_kvp_msg *)message->data;
1487 hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
1489 message->len = sizeof(struct hv_kvp_msg);
1491 len = netlink_send(fd, message);
1493 syslog(LOG_ERR, "netlink_send failed; error: %d %s", errno, strerror(errno));
1501 struct sockaddr *addr_p = (struct sockaddr *) &addr;
1502 socklen_t addr_l = sizeof(addr);
1503 pfd.events = POLLIN;
1506 if (poll(&pfd, 1, -1) < 0) {
1507 syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
1508 if (errno == EINVAL) {
1516 len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
1520 syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
1521 addr.nl_pid, errno, strerror(errno));
1527 syslog(LOG_WARNING, "Received packet from untrusted pid:%u",
1532 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
1534 if (incoming_msg->nlmsg_type != NLMSG_DONE)
1537 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
1538 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1541 * We will use the KVP header information to pass back
1542 * the error from this daemon. So, first copy the state
1543 * and set the error code to success.
1545 op = hv_msg->kvp_hdr.operation;
1546 pool = hv_msg->kvp_hdr.pool;
1547 hv_msg->error = HV_S_OK;
1549 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
1551 * Driver is registering with us; stash away the version
1555 p = (char *)hv_msg->body.kvp_register.version;
1556 lic_version = malloc(strlen(p) + 1);
1558 strcpy(lic_version, p);
1559 syslog(LOG_INFO, "KVP LIC Version: %s",
1562 syslog(LOG_ERR, "malloc failed");
1568 case KVP_OP_GET_IP_INFO:
1569 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1571 kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
1573 if (if_name == NULL) {
1575 * We could not map the mac address to an
1576 * interface name; return error.
1578 hv_msg->error = HV_E_FAIL;
1581 error = kvp_get_ip_info(
1582 0, if_name, KVP_OP_GET_IP_INFO,
1584 (MAX_IP_ADDR_SIZE * 2));
1587 hv_msg->error = error;
1592 case KVP_OP_SET_IP_INFO:
1593 kvp_ip_val = &hv_msg->body.kvp_ip_val;
1594 if_name = kvp_get_if_name(
1595 (char *)kvp_ip_val->adapter_id);
1596 if (if_name == NULL) {
1598 * We could not map the guid to an
1599 * interface name; return error.
1601 hv_msg->error = HV_GUID_NOTFOUND;
1604 error = kvp_set_ip_info(if_name, kvp_ip_val);
1606 hv_msg->error = error;
1612 if (kvp_key_add_or_modify(pool,
1613 hv_msg->body.kvp_set.data.key,
1614 hv_msg->body.kvp_set.data.key_size,
1615 hv_msg->body.kvp_set.data.value,
1616 hv_msg->body.kvp_set.data.value_size))
1617 hv_msg->error = HV_S_CONT;
1621 if (kvp_get_value(pool,
1622 hv_msg->body.kvp_set.data.key,
1623 hv_msg->body.kvp_set.data.key_size,
1624 hv_msg->body.kvp_set.data.value,
1625 hv_msg->body.kvp_set.data.value_size))
1626 hv_msg->error = HV_S_CONT;
1630 if (kvp_key_delete(pool,
1631 hv_msg->body.kvp_delete.key,
1632 hv_msg->body.kvp_delete.key_size))
1633 hv_msg->error = HV_S_CONT;
1640 if (op != KVP_OP_ENUMERATE)
1644 * If the pool is KVP_POOL_AUTO, dynamically generate
1645 * both the key and the value; if not read from the
1648 if (pool != KVP_POOL_AUTO) {
1649 if (kvp_pool_enumerate(pool,
1650 hv_msg->body.kvp_enum_data.index,
1651 hv_msg->body.kvp_enum_data.data.key,
1652 HV_KVP_EXCHANGE_MAX_KEY_SIZE,
1653 hv_msg->body.kvp_enum_data.data.value,
1654 HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
1655 hv_msg->error = HV_S_CONT;
1659 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
1660 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
1661 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
1663 switch (hv_msg->body.kvp_enum_data.index) {
1664 case FullyQualifiedDomainName:
1665 kvp_get_domain_name(key_value,
1666 HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1667 strcpy(key_name, "FullyQualifiedDomainName");
1669 case IntegrationServicesVersion:
1670 strcpy(key_name, "IntegrationServicesVersion");
1671 strcpy(key_value, lic_version);
1673 case NetworkAddressIPv4:
1674 kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
1675 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1676 strcpy(key_name, "NetworkAddressIPv4");
1678 case NetworkAddressIPv6:
1679 kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
1680 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
1681 strcpy(key_name, "NetworkAddressIPv6");
1684 strcpy(key_value, os_build);
1685 strcpy(key_name, "OSBuildNumber");
1688 strcpy(key_value, os_name);
1689 strcpy(key_name, "OSName");
1691 case OSMajorVersion:
1692 strcpy(key_value, os_major);
1693 strcpy(key_name, "OSMajorVersion");
1695 case OSMinorVersion:
1696 strcpy(key_value, os_minor);
1697 strcpy(key_name, "OSMinorVersion");
1700 strcpy(key_value, os_version);
1701 strcpy(key_name, "OSVersion");
1703 case ProcessorArchitecture:
1704 strcpy(key_value, processor_arch);
1705 strcpy(key_name, "ProcessorArchitecture");
1708 hv_msg->error = HV_S_CONT;
1712 * Send the value back to the kernel. The response is
1713 * already in the receive buffer. Update the cn_msg header to
1714 * reflect the key value that has been added to the message
1718 incoming_cn_msg->id.idx = CN_KVP_IDX;
1719 incoming_cn_msg->id.val = CN_KVP_VAL;
1720 incoming_cn_msg->ack = 0;
1721 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
1723 len = netlink_send(fd, incoming_cn_msg);
1725 syslog(LOG_ERR, "net_link send failed; error: %d %s", errno,