| /* |
| * An implementation of key value pair (KVP) functionality for Linux. |
| * |
| * |
| * Copyright (C) 2010, Novell, Inc. |
| * Author : K. Y. Srinivasan <ksrinivasan@novell.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| * NON INFRINGEMENT. See the GNU General Public License for more |
| * details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| |
| #include <sys/poll.h> |
| #include <sys/utsname.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <errno.h> |
| #include <arpa/inet.h> |
| #include <linux/hyperv.h> |
| #include <ifaddrs.h> |
| #include <netdb.h> |
| #include <syslog.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <dirent.h> |
| #include <net/if.h> |
| #include <limits.h> |
| #include <getopt.h> |
| |
| /* |
| * KVP protocol: The user mode component first registers with the |
| * the kernel component. Subsequently, the kernel component requests, data |
| * for the specified keys. In response to this message the user mode component |
| * fills in the value corresponding to the specified key. We overload the |
| * sequence field in the cn_msg header to define our KVP message types. |
| * |
| * We use this infrastructure for also supporting queries from user mode |
| * application for state that may be maintained in the KVP kernel component. |
| * |
| */ |
| |
| |
| enum key_index { |
| FullyQualifiedDomainName = 0, |
| IntegrationServicesVersion, /*This key is serviced in the kernel*/ |
| NetworkAddressIPv4, |
| NetworkAddressIPv6, |
| OSBuildNumber, |
| OSName, |
| OSMajorVersion, |
| OSMinorVersion, |
| OSVersion, |
| ProcessorArchitecture |
| }; |
| |
| |
| enum { |
| IPADDR = 0, |
| NETMASK, |
| GATEWAY, |
| DNS |
| }; |
| |
| static int in_hand_shake = 1; |
| |
| static char *os_name = ""; |
| static char *os_major = ""; |
| static char *os_minor = ""; |
| static char *processor_arch; |
| static char *os_build; |
| static char *os_version; |
| static char *lic_version = "Unknown version"; |
| static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; |
| static struct utsname uts_buf; |
| |
| /* |
| * The location of the interface configuration file. |
| */ |
| |
| #define KVP_CONFIG_LOC "/var/lib/hyperv" |
| |
| #ifndef KVP_SCRIPTS_PATH |
| #define KVP_SCRIPTS_PATH "/usr/libexec/hypervkvpd/" |
| #endif |
| |
| #define KVP_NET_DIR "/sys/class/net/" |
| |
| #define MAX_FILE_NAME 100 |
| #define ENTRIES_PER_BLOCK 50 |
| |
| struct kvp_record { |
| char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; |
| char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; |
| }; |
| |
| struct kvp_file_state { |
| int fd; |
| int num_blocks; |
| struct kvp_record *records; |
| int num_records; |
| char fname[MAX_FILE_NAME]; |
| }; |
| |
| static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT]; |
| |
| static void kvp_acquire_lock(int pool) |
| { |
| struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0}; |
| fl.l_pid = getpid(); |
| |
| if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) { |
| syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool, |
| errno, strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| static void kvp_release_lock(int pool) |
| { |
| struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0}; |
| fl.l_pid = getpid(); |
| |
| if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) { |
| syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool, |
| errno, strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| static void kvp_update_file(int pool) |
| { |
| FILE *filep; |
| |
| /* |
| * We are going to write our in-memory registry out to |
| * disk; acquire the lock first. |
| */ |
| kvp_acquire_lock(pool); |
| |
| filep = fopen(kvp_file_info[pool].fname, "we"); |
| if (!filep) { |
| syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, |
| errno, strerror(errno)); |
| kvp_release_lock(pool); |
| exit(EXIT_FAILURE); |
| } |
| |
| fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record), |
| kvp_file_info[pool].num_records, filep); |
| |
| if (ferror(filep) || fclose(filep)) { |
| kvp_release_lock(pool); |
| syslog(LOG_ERR, "Failed to write file, pool: %d", pool); |
| exit(EXIT_FAILURE); |
| } |
| |
| kvp_release_lock(pool); |
| } |
| |
| static void kvp_update_mem_state(int pool) |
| { |
| FILE *filep; |
| size_t records_read = 0; |
| struct kvp_record *record = kvp_file_info[pool].records; |
| struct kvp_record *readp; |
| int num_blocks = kvp_file_info[pool].num_blocks; |
| int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; |
| |
| kvp_acquire_lock(pool); |
| |
| filep = fopen(kvp_file_info[pool].fname, "re"); |
| if (!filep) { |
| syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool, |
| errno, strerror(errno)); |
| kvp_release_lock(pool); |
| exit(EXIT_FAILURE); |
| } |
| for (;;) { |
| readp = &record[records_read]; |
| records_read += fread(readp, sizeof(struct kvp_record), |
| ENTRIES_PER_BLOCK * num_blocks - records_read, |
| filep); |
| |
| if (ferror(filep)) { |
| syslog(LOG_ERR, |
| "Failed to read file, pool: %d; error: %d %s", |
| pool, errno, strerror(errno)); |
| kvp_release_lock(pool); |
| exit(EXIT_FAILURE); |
| } |
| |
| if (!feof(filep)) { |
| /* |
| * We have more data to read. |
| */ |
| num_blocks++; |
| record = realloc(record, alloc_unit * num_blocks); |
| |
| if (record == NULL) { |
| syslog(LOG_ERR, "malloc failed"); |
| kvp_release_lock(pool); |
| exit(EXIT_FAILURE); |
| } |
| continue; |
| } |
| break; |
| } |
| |
| kvp_file_info[pool].num_blocks = num_blocks; |
| kvp_file_info[pool].records = record; |
| kvp_file_info[pool].num_records = records_read; |
| |
| fclose(filep); |
| kvp_release_lock(pool); |
| } |
| |
| static int kvp_file_init(void) |
| { |
| int fd; |
| char *fname; |
| int i; |
| int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK; |
| |
| if (access(KVP_CONFIG_LOC, F_OK)) { |
| if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) { |
| syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC, |
| errno, strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| for (i = 0; i < KVP_POOL_COUNT; i++) { |
| fname = kvp_file_info[i].fname; |
| sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i); |
| fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */); |
| |
| if (fd == -1) |
| return 1; |
| |
| kvp_file_info[i].fd = fd; |
| kvp_file_info[i].num_blocks = 1; |
| kvp_file_info[i].records = malloc(alloc_unit); |
| if (kvp_file_info[i].records == NULL) |
| return 1; |
| kvp_file_info[i].num_records = 0; |
| kvp_update_mem_state(i); |
| } |
| |
| return 0; |
| } |
| |
| static int kvp_key_delete(int pool, const __u8 *key, int key_size) |
| { |
| int i; |
| int j, k; |
| int num_records; |
| struct kvp_record *record; |
| |
| /* |
| * First update the in-memory state. |
| */ |
| kvp_update_mem_state(pool); |
| |
| num_records = kvp_file_info[pool].num_records; |
| record = kvp_file_info[pool].records; |
| |
| for (i = 0; i < num_records; i++) { |
| if (memcmp(key, record[i].key, key_size)) |
| continue; |
| /* |
| * Found a match; just move the remaining |
| * entries up. |
| */ |
| if (i == (num_records - 1)) { |
| kvp_file_info[pool].num_records--; |
| kvp_update_file(pool); |
| return 0; |
| } |
| |
| j = i; |
| k = j + 1; |
| for (; k < num_records; k++) { |
| strcpy(record[j].key, record[k].key); |
| strcpy(record[j].value, record[k].value); |
| j++; |
| } |
| |
| kvp_file_info[pool].num_records--; |
| kvp_update_file(pool); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size, |
| const __u8 *value, int value_size) |
| { |
| int i; |
| int num_records; |
| struct kvp_record *record; |
| int num_blocks; |
| |
| if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || |
| (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) |
| return 1; |
| |
| /* |
| * First update the in-memory state. |
| */ |
| kvp_update_mem_state(pool); |
| |
| num_records = kvp_file_info[pool].num_records; |
| record = kvp_file_info[pool].records; |
| num_blocks = kvp_file_info[pool].num_blocks; |
| |
| for (i = 0; i < num_records; i++) { |
| if (memcmp(key, record[i].key, key_size)) |
| continue; |
| /* |
| * Found a match; just update the value - |
| * this is the modify case. |
| */ |
| memcpy(record[i].value, value, value_size); |
| kvp_update_file(pool); |
| return 0; |
| } |
| |
| /* |
| * Need to add a new entry; |
| */ |
| if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) { |
| /* Need to allocate a larger array for reg entries. */ |
| record = realloc(record, sizeof(struct kvp_record) * |
| ENTRIES_PER_BLOCK * (num_blocks + 1)); |
| |
| if (record == NULL) |
| return 1; |
| kvp_file_info[pool].num_blocks++; |
| |
| } |
| memcpy(record[i].value, value, value_size); |
| memcpy(record[i].key, key, key_size); |
| kvp_file_info[pool].records = record; |
| kvp_file_info[pool].num_records++; |
| kvp_update_file(pool); |
| return 0; |
| } |
| |
| static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value, |
| int value_size) |
| { |
| int i; |
| int num_records; |
| struct kvp_record *record; |
| |
| if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) || |
| (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) |
| return 1; |
| |
| /* |
| * First update the in-memory state. |
| */ |
| kvp_update_mem_state(pool); |
| |
| num_records = kvp_file_info[pool].num_records; |
| record = kvp_file_info[pool].records; |
| |
| for (i = 0; i < num_records; i++) { |
| if (memcmp(key, record[i].key, key_size)) |
| continue; |
| /* |
| * Found a match; just copy the value out. |
| */ |
| memcpy(value, record[i].value, value_size); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size, |
| __u8 *value, int value_size) |
| { |
| struct kvp_record *record; |
| |
| /* |
| * First update our in-memory database. |
| */ |
| kvp_update_mem_state(pool); |
| record = kvp_file_info[pool].records; |
| |
| if (index >= kvp_file_info[pool].num_records) { |
| return 1; |
| } |
| |
| memcpy(key, record[index].key, key_size); |
| memcpy(value, record[index].value, value_size); |
| return 0; |
| } |
| |
| |
| void kvp_get_os_info(void) |
| { |
| FILE *file; |
| char *p, buf[512]; |
| |
| uname(&uts_buf); |
| os_version = uts_buf.release; |
| os_build = strdup(uts_buf.release); |
| |
| os_name = uts_buf.sysname; |
| processor_arch = uts_buf.machine; |
| |
| /* |
| * The current windows host (win7) expects the build |
| * string to be of the form: x.y.z |
| * Strip additional information we may have. |
| */ |
| p = strchr(os_version, '-'); |
| if (p) |
| *p = '\0'; |
| |
| /* |
| * Parse the /etc/os-release file if present: |
| * http://www.freedesktop.org/software/systemd/man/os-release.html |
| */ |
| file = fopen("/etc/os-release", "r"); |
| if (file != NULL) { |
| while (fgets(buf, sizeof(buf), file)) { |
| char *value, *q; |
| |
| /* Ignore comments */ |
| if (buf[0] == '#') |
| continue; |
| |
| /* Split into name=value */ |
| p = strchr(buf, '='); |
| if (!p) |
| continue; |
| *p++ = 0; |
| |
| /* Remove quotes and newline; un-escape */ |
| value = p; |
| q = p; |
| while (*p) { |
| if (*p == '\\') { |
| ++p; |
| if (!*p) |
| break; |
| *q++ = *p++; |
| } else if (*p == '\'' || *p == '"' || |
| *p == '\n') { |
| ++p; |
| } else { |
| *q++ = *p++; |
| } |
| } |
| *q = 0; |
| |
| if (!strcmp(buf, "NAME")) { |
| p = strdup(value); |
| if (!p) |
| break; |
| os_name = p; |
| } else if (!strcmp(buf, "VERSION_ID")) { |
| p = strdup(value); |
| if (!p) |
| break; |
| os_major = p; |
| } |
| } |
| fclose(file); |
| return; |
| } |
| |
| /* Fallback for older RH/SUSE releases */ |
| file = fopen("/etc/SuSE-release", "r"); |
| if (file != NULL) |
| goto kvp_osinfo_found; |
| file = fopen("/etc/redhat-release", "r"); |
| if (file != NULL) |
| goto kvp_osinfo_found; |
| |
| /* |
| * We don't have information about the os. |
| */ |
| return; |
| |
| kvp_osinfo_found: |
| /* up to three lines */ |
| p = fgets(buf, sizeof(buf), file); |
| if (p) { |
| p = strchr(buf, '\n'); |
| if (p) |
| *p = '\0'; |
| p = strdup(buf); |
| if (!p) |
| goto done; |
| os_name = p; |
| |
| /* second line */ |
| p = fgets(buf, sizeof(buf), file); |
| if (p) { |
| p = strchr(buf, '\n'); |
| if (p) |
| *p = '\0'; |
| p = strdup(buf); |
| if (!p) |
| goto done; |
| os_major = p; |
| |
| /* third line */ |
| p = fgets(buf, sizeof(buf), file); |
| if (p) { |
| p = strchr(buf, '\n'); |
| if (p) |
| *p = '\0'; |
| p = strdup(buf); |
| if (p) |
| os_minor = p; |
| } |
| } |
| } |
| |
| done: |
| fclose(file); |
| return; |
| } |
| |
| |
| |
| /* |
| * Retrieve an interface name corresponding to the specified guid. |
| * If there is a match, the function returns a pointer |
| * to the interface name and if not, a NULL is returned. |
| * If a match is found, the caller is responsible for |
| * freeing the memory. |
| */ |
| |
| static char *kvp_get_if_name(char *guid) |
| { |
| DIR *dir; |
| struct dirent *entry; |
| FILE *file; |
| char *p, *x; |
| char *if_name = NULL; |
| char buf[256]; |
| char dev_id[PATH_MAX]; |
| |
| dir = opendir(KVP_NET_DIR); |
| if (dir == NULL) |
| return NULL; |
| |
| while ((entry = readdir(dir)) != NULL) { |
| /* |
| * Set the state for the next pass. |
| */ |
| snprintf(dev_id, sizeof(dev_id), "%s%s/device/device_id", |
| KVP_NET_DIR, entry->d_name); |
| |
| file = fopen(dev_id, "r"); |
| if (file == NULL) |
| continue; |
| |
| p = fgets(buf, sizeof(buf), file); |
| if (p) { |
| x = strchr(p, '\n'); |
| if (x) |
| *x = '\0'; |
| |
| if (!strcmp(p, guid)) { |
| /* |
| * Found the guid match; return the interface |
| * name. The caller will free the memory. |
| */ |
| if_name = strdup(entry->d_name); |
| fclose(file); |
| break; |
| } |
| } |
| fclose(file); |
| } |
| |
| closedir(dir); |
| return if_name; |
| } |
| |
| /* |
| * Retrieve the MAC address given the interface name. |
| */ |
| |
| static char *kvp_if_name_to_mac(char *if_name) |
| { |
| FILE *file; |
| char *p, *x; |
| char buf[256]; |
| char addr_file[PATH_MAX]; |
| unsigned int i; |
| char *mac_addr = NULL; |
| |
| snprintf(addr_file, sizeof(addr_file), "%s%s%s", KVP_NET_DIR, |
| if_name, "/address"); |
| |
| file = fopen(addr_file, "r"); |
| if (file == NULL) |
| return NULL; |
| |
| p = fgets(buf, sizeof(buf), file); |
| if (p) { |
| x = strchr(p, '\n'); |
| if (x) |
| *x = '\0'; |
| for (i = 0; i < strlen(p); i++) |
| p[i] = toupper(p[i]); |
| mac_addr = strdup(p); |
| } |
| |
| fclose(file); |
| return mac_addr; |
| } |
| |
| |
| /* |
| * Retrieve the interface name given tha MAC address. |
| */ |
| |
| static char *kvp_mac_to_if_name(char *mac) |
| { |
| DIR *dir; |
| struct dirent *entry; |
| FILE *file; |
| char *p, *x; |
| char *if_name = NULL; |
| char buf[256]; |
| char dev_id[PATH_MAX]; |
| unsigned int i; |
| |
| dir = opendir(KVP_NET_DIR); |
| if (dir == NULL) |
| return NULL; |
| |
| while ((entry = readdir(dir)) != NULL) { |
| /* |
| * Set the state for the next pass. |
| */ |
| snprintf(dev_id, sizeof(dev_id), "%s%s/address", KVP_NET_DIR, |
| entry->d_name); |
| |
| file = fopen(dev_id, "r"); |
| if (file == NULL) |
| continue; |
| |
| p = fgets(buf, sizeof(buf), file); |
| if (p) { |
| x = strchr(p, '\n'); |
| if (x) |
| *x = '\0'; |
| |
| for (i = 0; i < strlen(p); i++) |
| p[i] = toupper(p[i]); |
| |
| if (!strcmp(p, mac)) { |
| /* |
| * Found the MAC match; return the interface |
| * name. The caller will free the memory. |
| */ |
| if_name = strdup(entry->d_name); |
| fclose(file); |
| break; |
| } |
| } |
| fclose(file); |
| } |
| |
| closedir(dir); |
| return if_name; |
| } |
| |
| |
| static void kvp_process_ipconfig_file(char *cmd, |
| char *config_buf, unsigned int len, |
| int element_size, int offset) |
| { |
| char buf[256]; |
| char *p; |
| char *x; |
| FILE *file; |
| |
| /* |
| * First execute the command. |
| */ |
| file = popen(cmd, "r"); |
| if (file == NULL) |
| return; |
| |
| if (offset == 0) |
| memset(config_buf, 0, len); |
| while ((p = fgets(buf, sizeof(buf), file)) != NULL) { |
| if (len < strlen(config_buf) + element_size + 1) |
| break; |
| |
| x = strchr(p, '\n'); |
| if (x) |
| *x = '\0'; |
| |
| strcat(config_buf, p); |
| strcat(config_buf, ";"); |
| } |
| pclose(file); |
| } |
| |
| static void kvp_get_ipconfig_info(char *if_name, |
| struct hv_kvp_ipaddr_value *buffer) |
| { |
| char cmd[512]; |
| char dhcp_info[128]; |
| char *p; |
| FILE *file; |
| |
| /* |
| * Get the address of default gateway (ipv4). |
| */ |
| sprintf(cmd, "%s %s", "ip route show dev", if_name); |
| strcat(cmd, " | awk '/default/ {print $3 }'"); |
| |
| /* |
| * Execute the command to gather gateway info. |
| */ |
| kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, |
| (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0); |
| |
| /* |
| * Get the address of default gateway (ipv6). |
| */ |
| sprintf(cmd, "%s %s", "ip -f inet6 route show dev", if_name); |
| strcat(cmd, " | awk '/default/ {print $3 }'"); |
| |
| /* |
| * Execute the command to gather gateway info (ipv6). |
| */ |
| kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way, |
| (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1); |
| |
| |
| /* |
| * Gather the DNS state. |
| * Since there is no standard way to get this information |
| * across various distributions of interest; we just invoke |
| * an external script that needs to be ported across distros |
| * of interest. |
| * |
| * Following is the expected format of the information from the script: |
| * |
| * ipaddr1 (nameserver1) |
| * ipaddr2 (nameserver2) |
| * . |
| * . |
| */ |
| |
| sprintf(cmd, KVP_SCRIPTS_PATH "%s", "hv_get_dns_info"); |
| |
| /* |
| * Execute the command to gather DNS info. |
| */ |
| kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr, |
| (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0); |
| |
| /* |
| * Gather the DHCP state. |
| * We will gather this state by invoking an external script. |
| * The parameter to the script is the interface name. |
| * Here is the expected output: |
| * |
| * Enabled: DHCP enabled. |
| */ |
| |
| sprintf(cmd, KVP_SCRIPTS_PATH "%s %s", "hv_get_dhcp_info", if_name); |
| |
| file = popen(cmd, "r"); |
| if (file == NULL) |
| return; |
| |
| p = fgets(dhcp_info, sizeof(dhcp_info), file); |
| if (p == NULL) { |
| pclose(file); |
| return; |
| } |
| |
| if (!strncmp(p, "Enabled", 7)) |
| buffer->dhcp_enabled = 1; |
| else |
| buffer->dhcp_enabled = 0; |
| |
| pclose(file); |
| } |
| |
| |
| static unsigned int hweight32(unsigned int *w) |
| { |
| unsigned int res = *w - ((*w >> 1) & 0x55555555); |
| res = (res & 0x33333333) + ((res >> 2) & 0x33333333); |
| res = (res + (res >> 4)) & 0x0F0F0F0F; |
| res = res + (res >> 8); |
| return (res + (res >> 16)) & 0x000000FF; |
| } |
| |
| static int kvp_process_ip_address(void *addrp, |
| int family, char *buffer, |
| int length, int *offset) |
| { |
| struct sockaddr_in *addr; |
| struct sockaddr_in6 *addr6; |
| int addr_length; |
| char tmp[50]; |
| const char *str; |
| |
| if (family == AF_INET) { |
| addr = (struct sockaddr_in *)addrp; |
| str = inet_ntop(family, &addr->sin_addr, tmp, 50); |
| addr_length = INET_ADDRSTRLEN; |
| } else { |
| addr6 = (struct sockaddr_in6 *)addrp; |
| str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50); |
| addr_length = INET6_ADDRSTRLEN; |
| } |
| |
| if ((length - *offset) < addr_length + 2) |
| return HV_E_FAIL; |
| if (str == NULL) { |
| strcpy(buffer, "inet_ntop failed\n"); |
| return HV_E_FAIL; |
| } |
| if (*offset == 0) |
| strcpy(buffer, tmp); |
| else { |
| strcat(buffer, ";"); |
| strcat(buffer, tmp); |
| } |
| |
| *offset += strlen(str) + 1; |
| |
| return 0; |
| } |
| |
| static int |
| kvp_get_ip_info(int family, char *if_name, int op, |
| void *out_buffer, unsigned int length) |
| { |
| struct ifaddrs *ifap; |
| struct ifaddrs *curp; |
| int offset = 0; |
| int sn_offset = 0; |
| int error = 0; |
| char *buffer; |
| struct hv_kvp_ipaddr_value *ip_buffer; |
| char cidr_mask[5]; /* /xyz */ |
| int weight; |
| int i; |
| unsigned int *w; |
| char *sn_str; |
| struct sockaddr_in6 *addr6; |
| |
| if (op == KVP_OP_ENUMERATE) { |
| buffer = out_buffer; |
| } else { |
| ip_buffer = out_buffer; |
| buffer = (char *)ip_buffer->ip_addr; |
| ip_buffer->addr_family = 0; |
| } |
| /* |
| * On entry into this function, the buffer is capable of holding the |
| * maximum key value. |
| */ |
| |
| if (getifaddrs(&ifap)) { |
| strcpy(buffer, "getifaddrs failed\n"); |
| return HV_E_FAIL; |
| } |
| |
| curp = ifap; |
| while (curp != NULL) { |
| if (curp->ifa_addr == NULL) { |
| curp = curp->ifa_next; |
| continue; |
| } |
| |
| if ((if_name != NULL) && |
| (strncmp(curp->ifa_name, if_name, strlen(if_name)))) { |
| /* |
| * We want info about a specific interface; |
| * just continue. |
| */ |
| curp = curp->ifa_next; |
| continue; |
| } |
| |
| /* |
| * We only support two address families: AF_INET and AF_INET6. |
| * If a family value of 0 is specified, we collect both |
| * supported address families; if not we gather info on |
| * the specified address family. |
| */ |
| if ((((family != 0) && |
| (curp->ifa_addr->sa_family != family))) || |
| (curp->ifa_flags & IFF_LOOPBACK)) { |
| curp = curp->ifa_next; |
| continue; |
| } |
| if ((curp->ifa_addr->sa_family != AF_INET) && |
| (curp->ifa_addr->sa_family != AF_INET6)) { |
| curp = curp->ifa_next; |
| continue; |
| } |
| |
| if (op == KVP_OP_GET_IP_INFO) { |
| /* |
| * Gather info other than the IP address. |
| * IP address info will be gathered later. |
| */ |
| if (curp->ifa_addr->sa_family == AF_INET) { |
| ip_buffer->addr_family |= ADDR_FAMILY_IPV4; |
| /* |
| * Get subnet info. |
| */ |
| error = kvp_process_ip_address( |
| curp->ifa_netmask, |
| AF_INET, |
| (char *) |
| ip_buffer->sub_net, |
| length, |
| &sn_offset); |
| if (error) |
| goto gather_ipaddr; |
| } else { |
| ip_buffer->addr_family |= ADDR_FAMILY_IPV6; |
| |
| /* |
| * Get subnet info in CIDR format. |
| */ |
| weight = 0; |
| sn_str = (char *)ip_buffer->sub_net; |
| addr6 = (struct sockaddr_in6 *) |
| curp->ifa_netmask; |
| w = addr6->sin6_addr.s6_addr32; |
| |
| for (i = 0; i < 4; i++) |
| weight += hweight32(&w[i]); |
| |
| sprintf(cidr_mask, "/%d", weight); |
| if (length < sn_offset + strlen(cidr_mask) + 1) |
| goto gather_ipaddr; |
| |
| if (sn_offset == 0) |
| strcpy(sn_str, cidr_mask); |
| else { |
| strcat((char *)ip_buffer->sub_net, ";"); |
| strcat(sn_str, cidr_mask); |
| } |
| sn_offset += strlen(sn_str) + 1; |
| } |
| |
| /* |
| * Collect other ip related configuration info. |
| */ |
| |
| kvp_get_ipconfig_info(if_name, ip_buffer); |
| } |
| |
| gather_ipaddr: |
| error = kvp_process_ip_address(curp->ifa_addr, |
| curp->ifa_addr->sa_family, |
| buffer, |
| length, &offset); |
| if (error) |
| goto getaddr_done; |
| |
| curp = curp->ifa_next; |
| } |
| |
| getaddr_done: |
| freeifaddrs(ifap); |
| return error; |
| } |
| |
| |
| static int expand_ipv6(char *addr, int type) |
| { |
| int ret; |
| struct in6_addr v6_addr; |
| |
| ret = inet_pton(AF_INET6, addr, &v6_addr); |
| |
| if (ret != 1) { |
| if (type == NETMASK) |
| return 1; |
| return 0; |
| } |
| |
| sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:" |
| "%02x%02x:%02x%02x:%02x%02x", |
| (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1], |
| (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3], |
| (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5], |
| (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7], |
| (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9], |
| (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11], |
| (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13], |
| (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]); |
| |
| return 1; |
| |
| } |
| |
| static int is_ipv4(char *addr) |
| { |
| int ret; |
| struct in_addr ipv4_addr; |
| |
| ret = inet_pton(AF_INET, addr, &ipv4_addr); |
| |
| if (ret == 1) |
| return 1; |
| return 0; |
| } |
| |
| static int parse_ip_val_buffer(char *in_buf, int *offset, |
| char *out_buf, int out_len) |
| { |
| char *x; |
| char *start; |
| |
| /* |
| * in_buf has sequence of characters that are seperated by |
| * the character ';'. The last sequence does not have the |
| * terminating ";" character. |
| */ |
| start = in_buf + *offset; |
| |
| x = strchr(start, ';'); |
| if (x) |
| *x = 0; |
| else |
| x = start + strlen(start); |
| |
| if (strlen(start) != 0) { |
| int i = 0; |
| /* |
| * Get rid of leading spaces. |
| */ |
| while (start[i] == ' ') |
| i++; |
| |
| if ((x - start) <= out_len) { |
| strcpy(out_buf, (start + i)); |
| *offset += (x - start) + 1; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3) |
| { |
| int ret; |
| |
| ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3); |
| |
| if (ret < 0) |
| return HV_E_FAIL; |
| |
| return 0; |
| } |
| |
| |
| static int process_ip_string(FILE *f, char *ip_string, int type) |
| { |
| int error = 0; |
| char addr[INET6_ADDRSTRLEN]; |
| int i = 0; |
| int j = 0; |
| char str[256]; |
| char sub_str[13]; |
| int offset = 0; |
| |
| memset(addr, 0, sizeof(addr)); |
| |
| while (parse_ip_val_buffer(ip_string, &offset, addr, |
| (MAX_IP_ADDR_SIZE * 2))) { |
| |
| sub_str[0] = 0; |
| if (is_ipv4(addr)) { |
| switch (type) { |
| case IPADDR: |
| snprintf(str, sizeof(str), "%s", "IPADDR"); |
| break; |
| case NETMASK: |
| snprintf(str, sizeof(str), "%s", "NETMASK"); |
| break; |
| case GATEWAY: |
| snprintf(str, sizeof(str), "%s", "GATEWAY"); |
| break; |
| case DNS: |
| snprintf(str, sizeof(str), "%s", "DNS"); |
| break; |
| } |
| |
| if (type == DNS) { |
| snprintf(sub_str, sizeof(sub_str), "%d", ++i); |
| } else if (type == GATEWAY && i == 0) { |
| ++i; |
| } else { |
| snprintf(sub_str, sizeof(sub_str), "%d", i++); |
| } |
| |
| |
| } else if (expand_ipv6(addr, type)) { |
| switch (type) { |
| case IPADDR: |
| snprintf(str, sizeof(str), "%s", "IPV6ADDR"); |
| break; |
| case NETMASK: |
| snprintf(str, sizeof(str), "%s", "IPV6NETMASK"); |
| break; |
| case GATEWAY: |
| snprintf(str, sizeof(str), "%s", |
| "IPV6_DEFAULTGW"); |
| break; |
| case DNS: |
| snprintf(str, sizeof(str), "%s", "DNS"); |
| break; |
| } |
| |
| if (type == DNS) { |
| snprintf(sub_str, sizeof(sub_str), "%d", ++i); |
| } else if (j == 0) { |
| ++j; |
| } else { |
| snprintf(sub_str, sizeof(sub_str), "_%d", j++); |
| } |
| } else { |
| return HV_INVALIDARG; |
| } |
| |
| error = kvp_write_file(f, str, sub_str, addr); |
| if (error) |
| return error; |
| memset(addr, 0, sizeof(addr)); |
| } |
| |
| return 0; |
| } |
| |
| static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val) |
| { |
| int error = 0; |
| char if_file[PATH_MAX]; |
| FILE *file; |
| char cmd[PATH_MAX]; |
| char *mac_addr; |
| int str_len; |
| |
| /* |
| * Set the configuration for the specified interface with |
| * the information provided. Since there is no standard |
| * way to configure an interface, we will have an external |
| * script that does the job of configuring the interface and |
| * flushing the configuration. |
| * |
| * The parameters passed to this external script are: |
| * 1. A configuration file that has the specified configuration. |
| * |
| * We will embed the name of the interface in the configuration |
| * file: ifcfg-ethx (where ethx is the interface name). |
| * |
| * The information provided here may be more than what is needed |
| * in a given distro to configure the interface and so are free |
| * ignore information that may not be relevant. |
| * |
| * Here is the format of the ip configuration file: |
| * |
| * HWADDR=macaddr |
| * DEVICE=interface name |
| * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured |
| * or "none" if no boot-time protocol should be used) |
| * |
| * IPADDR0=ipaddr1 |
| * IPADDR1=ipaddr2 |
| * IPADDRx=ipaddry (where y = x + 1) |
| * |
| * NETMASK0=netmask1 |
| * NETMASKx=netmasky (where y = x + 1) |
| * |
| * GATEWAY=ipaddr1 |
| * GATEWAYx=ipaddry (where y = x + 1) |
| * |
| * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc) |
| * |
| * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be |
| * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as |
| * IPV6NETMASK. |
| * |
| * The host can specify multiple ipv4 and ipv6 addresses to be |
| * configured for the interface. Furthermore, the configuration |
| * needs to be persistent. A subsequent GET call on the interface |
| * is expected to return the configuration that is set via the SET |
| * call. |
| */ |
| |
| snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC, |
| "/ifcfg-", if_name); |
| |
| file = fopen(if_file, "w"); |
| |
| if (file == NULL) { |
| syslog(LOG_ERR, "Failed to open config file; error: %d %s", |
| errno, strerror(errno)); |
| return HV_E_FAIL; |
| } |
| |
| /* |
| * First write out the MAC address. |
| */ |
| |
| mac_addr = kvp_if_name_to_mac(if_name); |
| if (mac_addr == NULL) { |
| error = HV_E_FAIL; |
| goto setval_error; |
| } |
| |
| error = kvp_write_file(file, "HWADDR", "", mac_addr); |
| free(mac_addr); |
| if (error) |
| goto setval_error; |
| |
| error = kvp_write_file(file, "DEVICE", "", if_name); |
| if (error) |
| goto setval_error; |
| |
| /* |
| * The dhcp_enabled flag is only for IPv4. In the case the host only |
| * injects an IPv6 address, the flag is true, but we still need to |
| * proceed to parse and pass the IPv6 information to the |
| * disto-specific script hv_set_ifconfig. |
| */ |
| if (new_val->dhcp_enabled) { |
| error = kvp_write_file(file, "BOOTPROTO", "", "dhcp"); |
| if (error) |
| goto setval_error; |
| |
| } else { |
| error = kvp_write_file(file, "BOOTPROTO", "", "none"); |
| if (error) |
| goto setval_error; |
| } |
| |
| /* |
| * Write the configuration for ipaddress, netmask, gateway and |
| * name servers. |
| */ |
| |
| error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR); |
| if (error) |
| goto setval_error; |
| |
| error = process_ip_string(file, (char *)new_val->sub_net, NETMASK); |
| if (error) |
| goto setval_error; |
| |
| error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY); |
| if (error) |
| goto setval_error; |
| |
| error = process_ip_string(file, (char *)new_val->dns_addr, DNS); |
| if (error) |
| goto setval_error; |
| |
| fclose(file); |
| |
| /* |
| * Now that we have populated the configuration file, |
| * invoke the external script to do its magic. |
| */ |
| |
| str_len = snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s", |
| "hv_set_ifconfig", if_file); |
| /* |
| * This is a little overcautious, but it's necessary to suppress some |
| * false warnings from gcc 8.0.1. |
| */ |
| if (str_len <= 0 || (unsigned int)str_len >= sizeof(cmd)) { |
| syslog(LOG_ERR, "Cmd '%s' (len=%d) may be too long", |
| cmd, str_len); |
| return HV_E_FAIL; |
| } |
| |
| if (system(cmd)) { |
| syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s", |
| cmd, errno, strerror(errno)); |
| return HV_E_FAIL; |
| } |
| return 0; |
| |
| setval_error: |
| syslog(LOG_ERR, "Failed to write config file"); |
| fclose(file); |
| return error; |
| } |
| |
| |
| static void |
| kvp_get_domain_name(char *buffer, int length) |
| { |
| struct addrinfo hints, *info ; |
| int error = 0; |
| |
| gethostname(buffer, length); |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */ |
| hints.ai_socktype = SOCK_STREAM; |
| hints.ai_flags = AI_CANONNAME; |
| |
| error = getaddrinfo(buffer, NULL, &hints, &info); |
| if (error != 0) { |
| snprintf(buffer, length, "getaddrinfo failed: 0x%x %s", |
| error, gai_strerror(error)); |
| return; |
| } |
| snprintf(buffer, length, "%s", info->ai_canonname); |
| freeaddrinfo(info); |
| } |
| |
| void print_usage(char *argv[]) |
| { |
| fprintf(stderr, "Usage: %s [options]\n" |
| "Options are:\n" |
| " -n, --no-daemon stay in foreground, don't daemonize\n" |
| " -h, --help print this help\n", argv[0]); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| int kvp_fd, len; |
| int error; |
| struct pollfd pfd; |
| char *p; |
| struct hv_kvp_msg hv_msg[1]; |
| char *key_value; |
| char *key_name; |
| int op; |
| int pool; |
| char *if_name; |
| struct hv_kvp_ipaddr_value *kvp_ip_val; |
| int daemonize = 1, long_index = 0, opt; |
| |
| static struct option long_options[] = { |
| {"help", no_argument, 0, 'h' }, |
| {"no-daemon", no_argument, 0, 'n' }, |
| {0, 0, 0, 0 } |
| }; |
| |
| while ((opt = getopt_long(argc, argv, "hn", long_options, |
| &long_index)) != -1) { |
| switch (opt) { |
| case 'n': |
| daemonize = 0; |
| break; |
| case 'h': |
| default: |
| print_usage(argv); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| if (daemonize && daemon(1, 0)) |
| return 1; |
| |
| openlog("KVP", 0, LOG_USER); |
| syslog(LOG_INFO, "KVP starting; pid is:%d", getpid()); |
| |
| kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC); |
| |
| if (kvp_fd < 0) { |
| syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s", |
| errno, strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| |
| /* |
| * Retrieve OS release information. |
| */ |
| kvp_get_os_info(); |
| /* |
| * Cache Fully Qualified Domain Name because getaddrinfo takes an |
| * unpredictable amount of time to finish. |
| */ |
| kvp_get_domain_name(full_domain_name, sizeof(full_domain_name)); |
| |
| if (kvp_file_init()) { |
| syslog(LOG_ERR, "Failed to initialize the pools"); |
| exit(EXIT_FAILURE); |
| } |
| |
| /* |
| * Register ourselves with the kernel. |
| */ |
| hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1; |
| len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg)); |
| if (len != sizeof(struct hv_kvp_msg)) { |
| syslog(LOG_ERR, "registration to kernel failed; error: %d %s", |
| errno, strerror(errno)); |
| close(kvp_fd); |
| exit(EXIT_FAILURE); |
| } |
| |
| pfd.fd = kvp_fd; |
| |
| while (1) { |
| pfd.events = POLLIN; |
| pfd.revents = 0; |
| |
| if (poll(&pfd, 1, -1) < 0) { |
| syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno)); |
| if (errno == EINVAL) { |
| close(kvp_fd); |
| exit(EXIT_FAILURE); |
| } |
| else |
| continue; |
| } |
| |
| len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg)); |
| |
| if (len != sizeof(struct hv_kvp_msg)) { |
| syslog(LOG_ERR, "read failed; error:%d %s", |
| errno, strerror(errno)); |
| |
| close(kvp_fd); |
| return EXIT_FAILURE; |
| } |
| |
| /* |
| * We will use the KVP header information to pass back |
| * the error from this daemon. So, first copy the state |
| * and set the error code to success. |
| */ |
| op = hv_msg->kvp_hdr.operation; |
| pool = hv_msg->kvp_hdr.pool; |
| hv_msg->error = HV_S_OK; |
| |
| if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) { |
| /* |
| * Driver is registering with us; stash away the version |
| * information. |
| */ |
| in_hand_shake = 0; |
| p = (char *)hv_msg->body.kvp_register.version; |
| lic_version = malloc(strlen(p) + 1); |
| if (lic_version) { |
| strcpy(lic_version, p); |
| syslog(LOG_INFO, "KVP LIC Version: %s", |
| lic_version); |
| } else { |
| syslog(LOG_ERR, "malloc failed"); |
| } |
| continue; |
| } |
| |
| switch (op) { |
| case KVP_OP_GET_IP_INFO: |
| kvp_ip_val = &hv_msg->body.kvp_ip_val; |
| if_name = |
| kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id); |
| |
| if (if_name == NULL) { |
| /* |
| * We could not map the mac address to an |
| * interface name; return error. |
| */ |
| hv_msg->error = HV_E_FAIL; |
| break; |
| } |
| error = kvp_get_ip_info( |
| 0, if_name, KVP_OP_GET_IP_INFO, |
| kvp_ip_val, |
| (MAX_IP_ADDR_SIZE * 2)); |
| |
| if (error) |
| hv_msg->error = error; |
| |
| free(if_name); |
| break; |
| |
| case KVP_OP_SET_IP_INFO: |
| kvp_ip_val = &hv_msg->body.kvp_ip_val; |
| if_name = kvp_get_if_name( |
| (char *)kvp_ip_val->adapter_id); |
| if (if_name == NULL) { |
| /* |
| * We could not map the guid to an |
| * interface name; return error. |
| */ |
| hv_msg->error = HV_GUID_NOTFOUND; |
| break; |
| } |
| error = kvp_set_ip_info(if_name, kvp_ip_val); |
| if (error) |
| hv_msg->error = error; |
| |
| free(if_name); |
| break; |
| |
| case KVP_OP_SET: |
| if (kvp_key_add_or_modify(pool, |
| hv_msg->body.kvp_set.data.key, |
| hv_msg->body.kvp_set.data.key_size, |
| hv_msg->body.kvp_set.data.value, |
| hv_msg->body.kvp_set.data.value_size)) |
| hv_msg->error = HV_S_CONT; |
| break; |
| |
| case KVP_OP_GET: |
| if (kvp_get_value(pool, |
| hv_msg->body.kvp_set.data.key, |
| hv_msg->body.kvp_set.data.key_size, |
| hv_msg->body.kvp_set.data.value, |
| hv_msg->body.kvp_set.data.value_size)) |
| hv_msg->error = HV_S_CONT; |
| break; |
| |
| case KVP_OP_DELETE: |
| if (kvp_key_delete(pool, |
| hv_msg->body.kvp_delete.key, |
| hv_msg->body.kvp_delete.key_size)) |
| hv_msg->error = HV_S_CONT; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (op != KVP_OP_ENUMERATE) |
| goto kvp_done; |
| |
| /* |
| * If the pool is KVP_POOL_AUTO, dynamically generate |
| * both the key and the value; if not read from the |
| * appropriate pool. |
| */ |
| if (pool != KVP_POOL_AUTO) { |
| if (kvp_pool_enumerate(pool, |
| hv_msg->body.kvp_enum_data.index, |
| hv_msg->body.kvp_enum_data.data.key, |
| HV_KVP_EXCHANGE_MAX_KEY_SIZE, |
| hv_msg->body.kvp_enum_data.data.value, |
| HV_KVP_EXCHANGE_MAX_VALUE_SIZE)) |
| hv_msg->error = HV_S_CONT; |
| goto kvp_done; |
| } |
| |
| key_name = (char *)hv_msg->body.kvp_enum_data.data.key; |
| key_value = (char *)hv_msg->body.kvp_enum_data.data.value; |
| |
| switch (hv_msg->body.kvp_enum_data.index) { |
| case FullyQualifiedDomainName: |
| strcpy(key_value, full_domain_name); |
| strcpy(key_name, "FullyQualifiedDomainName"); |
| break; |
| case IntegrationServicesVersion: |
| strcpy(key_name, "IntegrationServicesVersion"); |
| strcpy(key_value, lic_version); |
| break; |
| case NetworkAddressIPv4: |
| kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE, |
| key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); |
| strcpy(key_name, "NetworkAddressIPv4"); |
| break; |
| case NetworkAddressIPv6: |
| kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE, |
| key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE); |
| strcpy(key_name, "NetworkAddressIPv6"); |
| break; |
| case OSBuildNumber: |
| strcpy(key_value, os_build); |
| strcpy(key_name, "OSBuildNumber"); |
| break; |
| case OSName: |
| strcpy(key_value, os_name); |
| strcpy(key_name, "OSName"); |
| break; |
| case OSMajorVersion: |
| strcpy(key_value, os_major); |
| strcpy(key_name, "OSMajorVersion"); |
| break; |
| case OSMinorVersion: |
| strcpy(key_value, os_minor); |
| strcpy(key_name, "OSMinorVersion"); |
| break; |
| case OSVersion: |
| strcpy(key_value, os_version); |
| strcpy(key_name, "OSVersion"); |
| break; |
| case ProcessorArchitecture: |
| strcpy(key_value, processor_arch); |
| strcpy(key_name, "ProcessorArchitecture"); |
| break; |
| default: |
| hv_msg->error = HV_S_CONT; |
| break; |
| } |
| |
| /* Send the value back to the kernel. */ |
| kvp_done: |
| len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg)); |
| if (len != sizeof(struct hv_kvp_msg)) { |
| syslog(LOG_ERR, "write failed; error: %d %s", errno, |
| strerror(errno)); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| close(kvp_fd); |
| exit(0); |
| } |