The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/tools/hv/hv_kvp_daemon.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*
    2  * An implementation of key value pair (KVP) functionality for Linux.
    3  *
    4  *
    5  * Copyright (C) 2010, Novell, Inc.
    6  * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
    7  *
    8  * This program is free software; you can redistribute it and/or modify it
    9  * under the terms of the GNU General Public License version 2 as published
   10  * by the Free Software Foundation.
   11  *
   12  * This program is distributed in the hope that it will be useful, but
   13  * WITHOUT ANY WARRANTY; without even the implied warranty of
   14  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
   15  * NON INFRINGEMENT.  See the GNU General Public License for more
   16  * details.
   17  *
   18  * You should have received a copy of the GNU General Public License
   19  * along with this program; if not, write to the Free Software
   20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   21  *
   22  */
   23 
   24 
   25 #include <sys/types.h>
   26 #include <sys/socket.h>
   27 #include <sys/poll.h>
   28 #include <sys/utsname.h>
   29 #include <linux/types.h>
   30 #include <stdio.h>
   31 #include <stdlib.h>
   32 #include <unistd.h>
   33 #include <string.h>
   34 #include <ctype.h>
   35 #include <errno.h>
   36 #include <arpa/inet.h>
   37 #include <linux/connector.h>
   38 #include <linux/hyperv.h>
   39 #include <linux/netlink.h>
   40 #include <ifaddrs.h>
   41 #include <netdb.h>
   42 #include <syslog.h>
   43 #include <sys/stat.h>
   44 #include <fcntl.h>
   45 #include <dirent.h>
   46 #include <net/if.h>
   47 
   48 /*
   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.
   54  *
   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.
   57  *
   58  */
   59 
   60 
   61 enum key_index {
   62         FullyQualifiedDomainName = 0,
   63         IntegrationServicesVersion, /*This key is serviced in the kernel*/
   64         NetworkAddressIPv4,
   65         NetworkAddressIPv6,
   66         OSBuildNumber,
   67         OSName,
   68         OSMajorVersion,
   69         OSMinorVersion,
   70         OSVersion,
   71         ProcessorArchitecture
   72 };
   73 
   74 
   75 enum {
   76         IPADDR = 0,
   77         NETMASK,
   78         GATEWAY,
   79         DNS
   80 };
   81 
   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;
   86 
   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;
   95 
   96 /*
   97  * The location of the interface configuration file.
   98  */
   99 
  100 #define KVP_CONFIG_LOC  "/var/opt/"
  101 
  102 #define MAX_FILE_NAME 100
  103 #define ENTRIES_PER_BLOCK 50
  104 
  105 struct kvp_record {
  106         char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
  107         char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
  108 };
  109 
  110 struct kvp_file_state {
  111         int fd;
  112         int num_blocks;
  113         struct kvp_record *records;
  114         int num_records;
  115         char fname[MAX_FILE_NAME];
  116 };
  117 
  118 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
  119 
  120 static void kvp_acquire_lock(int pool)
  121 {
  122         struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
  123         fl.l_pid = getpid();
  124 
  125         if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
  126                 syslog(LOG_ERR, "Failed to acquire the lock pool: %d", pool);
  127                 exit(EXIT_FAILURE);
  128         }
  129 }
  130 
  131 static void kvp_release_lock(int pool)
  132 {
  133         struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
  134         fl.l_pid = getpid();
  135 
  136         if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
  137                 perror("fcntl");
  138                 syslog(LOG_ERR, "Failed to release the lock pool: %d", pool);
  139                 exit(EXIT_FAILURE);
  140         }
  141 }
  142 
  143 static void kvp_update_file(int pool)
  144 {
  145         FILE *filep;
  146         size_t bytes_written;
  147 
  148         /*
  149          * We are going to write our in-memory registry out to
  150          * disk; acquire the lock first.
  151          */
  152         kvp_acquire_lock(pool);
  153 
  154         filep = fopen(kvp_file_info[pool].fname, "w");
  155         if (!filep) {
  156                 kvp_release_lock(pool);
  157                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
  158                 exit(EXIT_FAILURE);
  159         }
  160 
  161         bytes_written = fwrite(kvp_file_info[pool].records,
  162                                 sizeof(struct kvp_record),
  163                                 kvp_file_info[pool].num_records, filep);
  164 
  165         if (ferror(filep) || fclose(filep)) {
  166                 kvp_release_lock(pool);
  167                 syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
  168                 exit(EXIT_FAILURE);
  169         }
  170 
  171         kvp_release_lock(pool);
  172 }
  173 
  174 static void kvp_update_mem_state(int pool)
  175 {
  176         FILE *filep;
  177         size_t records_read = 0;
  178         struct kvp_record *record = kvp_file_info[pool].records;
  179         struct kvp_record *readp;
  180         int num_blocks = kvp_file_info[pool].num_blocks;
  181         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
  182 
  183         kvp_acquire_lock(pool);
  184 
  185         filep = fopen(kvp_file_info[pool].fname, "r");
  186         if (!filep) {
  187                 kvp_release_lock(pool);
  188                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
  189                 exit(EXIT_FAILURE);
  190         }
  191         for (;;) {
  192                 readp = &record[records_read];
  193                 records_read += fread(readp, sizeof(struct kvp_record),
  194                                         ENTRIES_PER_BLOCK * num_blocks,
  195                                         filep);
  196 
  197                 if (ferror(filep)) {
  198                         syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
  199                         exit(EXIT_FAILURE);
  200                 }
  201 
  202                 if (!feof(filep)) {
  203                         /*
  204                          * We have more data to read.
  205                          */
  206                         num_blocks++;
  207                         record = realloc(record, alloc_unit * num_blocks);
  208 
  209                         if (record == NULL) {
  210                                 syslog(LOG_ERR, "malloc failed");
  211                                 exit(EXIT_FAILURE);
  212                         }
  213                         continue;
  214                 }
  215                 break;
  216         }
  217 
  218         kvp_file_info[pool].num_blocks = num_blocks;
  219         kvp_file_info[pool].records = record;
  220         kvp_file_info[pool].num_records = records_read;
  221 
  222         fclose(filep);
  223         kvp_release_lock(pool);
  224 }
  225 static int kvp_file_init(void)
  226 {
  227         int  fd;
  228         FILE *filep;
  229         size_t records_read;
  230         char *fname;
  231         struct kvp_record *record;
  232         struct kvp_record *readp;
  233         int num_blocks;
  234         int i;
  235         int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
  236 
  237         if (access("/var/opt/hyperv", F_OK)) {
  238                 if (mkdir("/var/opt/hyperv", S_IRUSR | S_IWUSR | S_IROTH)) {
  239                         syslog(LOG_ERR, " Failed to create /var/opt/hyperv");
  240                         exit(EXIT_FAILURE);
  241                 }
  242         }
  243 
  244         for (i = 0; i < KVP_POOL_COUNT; i++) {
  245                 fname = kvp_file_info[i].fname;
  246                 records_read = 0;
  247                 num_blocks = 1;
  248                 sprintf(fname, "/var/opt/hyperv/.kvp_pool_%d", i);
  249                 fd = open(fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IROTH);
  250 
  251                 if (fd == -1)
  252                         return 1;
  253 
  254 
  255                 filep = fopen(fname, "r");
  256                 if (!filep)
  257                         return 1;
  258 
  259                 record = malloc(alloc_unit * num_blocks);
  260                 if (record == NULL) {
  261                         fclose(filep);
  262                         return 1;
  263                 }
  264                 for (;;) {
  265                         readp = &record[records_read];
  266                         records_read += fread(readp, sizeof(struct kvp_record),
  267                                         ENTRIES_PER_BLOCK,
  268                                         filep);
  269 
  270                         if (ferror(filep)) {
  271                                 syslog(LOG_ERR, "Failed to read file, pool: %d",
  272                                        i);
  273                                 exit(EXIT_FAILURE);
  274                         }
  275 
  276                         if (!feof(filep)) {
  277                                 /*
  278                                  * We have more data to read.
  279                                  */
  280                                 num_blocks++;
  281                                 record = realloc(record, alloc_unit *
  282                                                 num_blocks);
  283                                 if (record == NULL) {
  284                                         fclose(filep);
  285                                         return 1;
  286                                 }
  287                                 continue;
  288                         }
  289                         break;
  290                 }
  291                 kvp_file_info[i].fd = fd;
  292                 kvp_file_info[i].num_blocks = num_blocks;
  293                 kvp_file_info[i].records = record;
  294                 kvp_file_info[i].num_records = records_read;
  295                 fclose(filep);
  296 
  297         }
  298 
  299         return 0;
  300 }
  301 
  302 static int kvp_key_delete(int pool, const char *key, int key_size)
  303 {
  304         int i;
  305         int j, k;
  306         int num_records;
  307         struct kvp_record *record;
  308 
  309         /*
  310          * First update the in-memory state.
  311          */
  312         kvp_update_mem_state(pool);
  313 
  314         num_records = kvp_file_info[pool].num_records;
  315         record = kvp_file_info[pool].records;
  316 
  317         for (i = 0; i < num_records; i++) {
  318                 if (memcmp(key, record[i].key, key_size))
  319                         continue;
  320                 /*
  321                  * Found a match; just move the remaining
  322                  * entries up.
  323                  */
  324                 if (i == num_records) {
  325                         kvp_file_info[pool].num_records--;
  326                         kvp_update_file(pool);
  327                         return 0;
  328                 }
  329 
  330                 j = i;
  331                 k = j + 1;
  332                 for (; k < num_records; k++) {
  333                         strcpy(record[j].key, record[k].key);
  334                         strcpy(record[j].value, record[k].value);
  335                         j++;
  336                 }
  337 
  338                 kvp_file_info[pool].num_records--;
  339                 kvp_update_file(pool);
  340                 return 0;
  341         }
  342         return 1;
  343 }
  344 
  345 static int kvp_key_add_or_modify(int pool, const char *key, int key_size, const char *value,
  346                         int value_size)
  347 {
  348         int i;
  349         int num_records;
  350         struct kvp_record *record;
  351         int num_blocks;
  352 
  353         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
  354                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
  355                 return 1;
  356 
  357         /*
  358          * First update the in-memory state.
  359          */
  360         kvp_update_mem_state(pool);
  361 
  362         num_records = kvp_file_info[pool].num_records;
  363         record = kvp_file_info[pool].records;
  364         num_blocks = kvp_file_info[pool].num_blocks;
  365 
  366         for (i = 0; i < num_records; i++) {
  367                 if (memcmp(key, record[i].key, key_size))
  368                         continue;
  369                 /*
  370                  * Found a match; just update the value -
  371                  * this is the modify case.
  372                  */
  373                 memcpy(record[i].value, value, value_size);
  374                 kvp_update_file(pool);
  375                 return 0;
  376         }
  377 
  378         /*
  379          * Need to add a new entry;
  380          */
  381         if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
  382                 /* Need to allocate a larger array for reg entries. */
  383                 record = realloc(record, sizeof(struct kvp_record) *
  384                          ENTRIES_PER_BLOCK * (num_blocks + 1));
  385 
  386                 if (record == NULL)
  387                         return 1;
  388                 kvp_file_info[pool].num_blocks++;
  389 
  390         }
  391         memcpy(record[i].value, value, value_size);
  392         memcpy(record[i].key, key, key_size);
  393         kvp_file_info[pool].records = record;
  394         kvp_file_info[pool].num_records++;
  395         kvp_update_file(pool);
  396         return 0;
  397 }
  398 
  399 static int kvp_get_value(int pool, const char *key, int key_size, char *value,
  400                         int value_size)
  401 {
  402         int i;
  403         int num_records;
  404         struct kvp_record *record;
  405 
  406         if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
  407                 (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
  408                 return 1;
  409 
  410         /*
  411          * First update the in-memory state.
  412          */
  413         kvp_update_mem_state(pool);
  414 
  415         num_records = kvp_file_info[pool].num_records;
  416         record = kvp_file_info[pool].records;
  417 
  418         for (i = 0; i < num_records; i++) {
  419                 if (memcmp(key, record[i].key, key_size))
  420                         continue;
  421                 /*
  422                  * Found a match; just copy the value out.
  423                  */
  424                 memcpy(value, record[i].value, value_size);
  425                 return 0;
  426         }
  427 
  428         return 1;
  429 }
  430 
  431 static int kvp_pool_enumerate(int pool, int index, char *key, int key_size,
  432                                 char *value, int value_size)
  433 {
  434         struct kvp_record *record;
  435 
  436         /*
  437          * First update our in-memory database.
  438          */
  439         kvp_update_mem_state(pool);
  440         record = kvp_file_info[pool].records;
  441 
  442         if (index >= kvp_file_info[pool].num_records) {
  443                 return 1;
  444         }
  445 
  446         memcpy(key, record[index].key, key_size);
  447         memcpy(value, record[index].value, value_size);
  448         return 0;
  449 }
  450 
  451 
  452 void kvp_get_os_info(void)
  453 {
  454         FILE    *file;
  455         char    *p, buf[512];
  456 
  457         uname(&uts_buf);
  458         os_version = uts_buf.release;
  459         os_build = strdup(uts_buf.release);
  460 
  461         os_name = uts_buf.sysname;
  462         processor_arch = uts_buf.machine;
  463 
  464         /*
  465          * The current windows host (win7) expects the build
  466          * string to be of the form: x.y.z
  467          * Strip additional information we may have.
  468          */
  469         p = strchr(os_version, '-');
  470         if (p)
  471                 *p = '\0';
  472 
  473         /*
  474          * Parse the /etc/os-release file if present:
  475          * http://www.freedesktop.org/software/systemd/man/os-release.html
  476          */
  477         file = fopen("/etc/os-release", "r");
  478         if (file != NULL) {
  479                 while (fgets(buf, sizeof(buf), file)) {
  480                         char *value, *q;
  481 
  482                         /* Ignore comments */
  483                         if (buf[0] == '#')
  484                                 continue;
  485 
  486                         /* Split into name=value */
  487                         p = strchr(buf, '=');
  488                         if (!p)
  489                                 continue;
  490                         *p++ = 0;
  491 
  492                         /* Remove quotes and newline; un-escape */
  493                         value = p;
  494                         q = p;
  495                         while (*p) {
  496                                 if (*p == '\\') {
  497                                         ++p;
  498                                         if (!*p)
  499                                                 break;
  500                                         *q++ = *p++;
  501                                 } else if (*p == '\'' || *p == '"' ||
  502                                            *p == '\n') {
  503                                         ++p;
  504                                 } else {
  505                                         *q++ = *p++;
  506                                 }
  507                         }
  508                         *q = 0;
  509 
  510                         if (!strcmp(buf, "NAME")) {
  511                                 p = strdup(value);
  512                                 if (!p)
  513                                         break;
  514                                 os_name = p;
  515                         } else if (!strcmp(buf, "VERSION_ID")) {
  516                                 p = strdup(value);
  517                                 if (!p)
  518                                         break;
  519                                 os_major = p;
  520                         }
  521                 }
  522                 fclose(file);
  523                 return;
  524         }
  525 
  526         /* Fallback for older RH/SUSE releases */
  527         file = fopen("/etc/SuSE-release", "r");
  528         if (file != NULL)
  529                 goto kvp_osinfo_found;
  530         file  = fopen("/etc/redhat-release", "r");
  531         if (file != NULL)
  532                 goto kvp_osinfo_found;
  533 
  534         /*
  535          * We don't have information about the os.
  536          */
  537         return;
  538 
  539 kvp_osinfo_found:
  540         /* up to three lines */
  541         p = fgets(buf, sizeof(buf), file);
  542         if (p) {
  543                 p = strchr(buf, '\n');
  544                 if (p)
  545                         *p = '\0';
  546                 p = strdup(buf);
  547                 if (!p)
  548                         goto done;
  549                 os_name = p;
  550 
  551                 /* second line */
  552                 p = fgets(buf, sizeof(buf), file);
  553                 if (p) {
  554                         p = strchr(buf, '\n');
  555                         if (p)
  556                                 *p = '\0';
  557                         p = strdup(buf);
  558                         if (!p)
  559                                 goto done;
  560                         os_major = p;
  561 
  562                         /* third line */
  563                         p = fgets(buf, sizeof(buf), file);
  564                         if (p)  {
  565                                 p = strchr(buf, '\n');
  566                                 if (p)
  567                                         *p = '\0';
  568                                 p = strdup(buf);
  569                                 if (p)
  570                                         os_minor = p;
  571                         }
  572                 }
  573         }
  574 
  575 done:
  576         fclose(file);
  577         return;
  578 }
  579 
  580 
  581 
  582 /*
  583  * Retrieve an interface name corresponding to the specified guid.
  584  * If there is a match, the function returns a pointer
  585  * to the interface name and if not, a NULL is returned.
  586  * If a match is found, the caller is responsible for
  587  * freeing the memory.
  588  */
  589 
  590 static char *kvp_get_if_name(char *guid)
  591 {
  592         DIR *dir;
  593         struct dirent *entry;
  594         FILE    *file;
  595         char    *p, *q, *x;
  596         char    *if_name = NULL;
  597         char    buf[256];
  598         char *kvp_net_dir = "/sys/class/net/";
  599         char dev_id[256];
  600 
  601         dir = opendir(kvp_net_dir);
  602         if (dir == NULL)
  603                 return NULL;
  604 
  605         snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
  606         q = dev_id + strlen(kvp_net_dir);
  607 
  608         while ((entry = readdir(dir)) != NULL) {
  609                 /*
  610                  * Set the state for the next pass.
  611                  */
  612                 *q = '\0';
  613                 strcat(dev_id, entry->d_name);
  614                 strcat(dev_id, "/device/device_id");
  615 
  616                 file = fopen(dev_id, "r");
  617                 if (file == NULL)
  618                         continue;
  619 
  620                 p = fgets(buf, sizeof(buf), file);
  621                 if (p) {
  622                         x = strchr(p, '\n');
  623                         if (x)
  624                                 *x = '\0';
  625 
  626                         if (!strcmp(p, guid)) {
  627                                 /*
  628                                  * Found the guid match; return the interface
  629                                  * name. The caller will free the memory.
  630                                  */
  631                                 if_name = strdup(entry->d_name);
  632                                 fclose(file);
  633                                 break;
  634                         }
  635                 }
  636                 fclose(file);
  637         }
  638 
  639         closedir(dir);
  640         return if_name;
  641 }
  642 
  643 /*
  644  * Retrieve the MAC address given the interface name.
  645  */
  646 
  647 static char *kvp_if_name_to_mac(char *if_name)
  648 {
  649         FILE    *file;
  650         char    *p, *x;
  651         char    buf[256];
  652         char addr_file[256];
  653         int i;
  654         char *mac_addr = NULL;
  655 
  656         snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
  657                 if_name, "/address");
  658 
  659         file = fopen(addr_file, "r");
  660         if (file == NULL)
  661                 return NULL;
  662 
  663         p = fgets(buf, sizeof(buf), file);
  664         if (p) {
  665                 x = strchr(p, '\n');
  666                 if (x)
  667                         *x = '\0';
  668                 for (i = 0; i < strlen(p); i++)
  669                         p[i] = toupper(p[i]);
  670                 mac_addr = strdup(p);
  671         }
  672 
  673         fclose(file);
  674         return mac_addr;
  675 }
  676 
  677 
  678 /*
  679  * Retrieve the interface name given tha MAC address.
  680  */
  681 
  682 static char *kvp_mac_to_if_name(char *mac)
  683 {
  684         DIR *dir;
  685         struct dirent *entry;
  686         FILE    *file;
  687         char    *p, *q, *x;
  688         char    *if_name = NULL;
  689         char    buf[256];
  690         char *kvp_net_dir = "/sys/class/net/";
  691         char dev_id[256];
  692         int i;
  693 
  694         dir = opendir(kvp_net_dir);
  695         if (dir == NULL)
  696                 return NULL;
  697 
  698         snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
  699         q = dev_id + strlen(kvp_net_dir);
  700 
  701         while ((entry = readdir(dir)) != NULL) {
  702                 /*
  703                  * Set the state for the next pass.
  704                  */
  705                 *q = '\0';
  706 
  707                 strcat(dev_id, entry->d_name);
  708                 strcat(dev_id, "/address");
  709 
  710                 file = fopen(dev_id, "r");
  711                 if (file == NULL)
  712                         continue;
  713 
  714                 p = fgets(buf, sizeof(buf), file);
  715                 if (p) {
  716                         x = strchr(p, '\n');
  717                         if (x)
  718                                 *x = '\0';
  719 
  720                         for (i = 0; i < strlen(p); i++)
  721                                 p[i] = toupper(p[i]);
  722 
  723                         if (!strcmp(p, mac)) {
  724                                 /*
  725                                  * Found the MAC match; return the interface
  726                                  * name. The caller will free the memory.
  727                                  */
  728                                 if_name = strdup(entry->d_name);
  729                                 fclose(file);
  730                                 break;
  731                         }
  732                 }
  733                 fclose(file);
  734         }
  735 
  736         closedir(dir);
  737         return if_name;
  738 }
  739 
  740 
  741 static void kvp_process_ipconfig_file(char *cmd,
  742                                         char *config_buf, int len,
  743                                         int element_size, int offset)
  744 {
  745         char buf[256];
  746         char *p;
  747         char *x;
  748         FILE *file;
  749 
  750         /*
  751          * First execute the command.
  752          */
  753         file = popen(cmd, "r");
  754         if (file == NULL)
  755                 return;
  756 
  757         if (offset == 0)
  758                 memset(config_buf, 0, len);
  759         while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
  760                 if ((len - strlen(config_buf)) < (element_size + 1))
  761                         break;
  762 
  763                 x = strchr(p, '\n');
  764                 *x = '\0';
  765                 strcat(config_buf, p);
  766                 strcat(config_buf, ";");
  767         }
  768         pclose(file);
  769 }
  770 
  771 static void kvp_get_ipconfig_info(char *if_name,
  772                                  struct hv_kvp_ipaddr_value *buffer)
  773 {
  774         char cmd[512];
  775         char dhcp_info[128];
  776         char *p;
  777         FILE *file;
  778 
  779         /*
  780          * Get the address of default gateway (ipv4).
  781          */
  782         sprintf(cmd, "%s %s", "ip route show dev", if_name);
  783         strcat(cmd, " | awk '/default/ {print $3 }'");
  784 
  785         /*
  786          * Execute the command to gather gateway info.
  787          */
  788         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
  789                                 (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
  790 
  791         /*
  792          * Get the address of default gateway (ipv6).
  793          */
  794         sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
  795         strcat(cmd, " | awk '/default/ {print $3 }'");
  796 
  797         /*
  798          * Execute the command to gather gateway info (ipv6).
  799          */
  800         kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
  801                                 (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
  802 
  803 
  804         /*
  805          * Gather the DNS  state.
  806          * Since there is no standard way to get this information
  807          * across various distributions of interest; we just invoke
  808          * an external script that needs to be ported across distros
  809          * of interest.
  810          *
  811          * Following is the expected format of the information from the script:
  812          *
  813          * ipaddr1 (nameserver1)
  814          * ipaddr2 (nameserver2)
  815          * .
  816          * .
  817          */
  818 
  819         sprintf(cmd, "%s",  "hv_get_dns_info");
  820 
  821         /*
  822          * Execute the command to gather DNS info.
  823          */
  824         kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
  825                                 (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
  826 
  827         /*
  828          * Gather the DHCP state.
  829          * We will gather this state by invoking an external script.
  830          * The parameter to the script is the interface name.
  831          * Here is the expected output:
  832          *
  833          * Enabled: DHCP enabled.
  834          */
  835 
  836         sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
  837 
  838         file = popen(cmd, "r");
  839         if (file == NULL)
  840                 return;
  841 
  842         p = fgets(dhcp_info, sizeof(dhcp_info), file);
  843         if (p == NULL) {
  844                 pclose(file);
  845                 return;
  846         }
  847 
  848         if (!strncmp(p, "Enabled", 7))
  849                 buffer->dhcp_enabled = 1;
  850         else
  851                 buffer->dhcp_enabled = 0;
  852 
  853         pclose(file);
  854 }
  855 
  856 
  857 static unsigned int hweight32(unsigned int *w)
  858 {
  859         unsigned int res = *w - ((*w >> 1) & 0x55555555);
  860         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
  861         res = (res + (res >> 4)) & 0x0F0F0F0F;
  862         res = res + (res >> 8);
  863         return (res + (res >> 16)) & 0x000000FF;
  864 }
  865 
  866 static int kvp_process_ip_address(void *addrp,
  867                                 int family, char *buffer,
  868                                 int length,  int *offset)
  869 {
  870         struct sockaddr_in *addr;
  871         struct sockaddr_in6 *addr6;
  872         int addr_length;
  873         char tmp[50];
  874         const char *str;
  875 
  876         if (family == AF_INET) {
  877                 addr = (struct sockaddr_in *)addrp;
  878                 str = inet_ntop(family, &addr->sin_addr, tmp, 50);
  879                 addr_length = INET_ADDRSTRLEN;
  880         } else {
  881                 addr6 = (struct sockaddr_in6 *)addrp;
  882                 str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
  883                 addr_length = INET6_ADDRSTRLEN;
  884         }
  885 
  886         if ((length - *offset) < addr_length + 2)
  887                 return HV_E_FAIL;
  888         if (str == NULL) {
  889                 strcpy(buffer, "inet_ntop failed\n");
  890                 return HV_E_FAIL;
  891         }
  892         if (*offset == 0)
  893                 strcpy(buffer, tmp);
  894         else {
  895                 strcat(buffer, ";");
  896                 strcat(buffer, tmp);
  897         }
  898 
  899         *offset += strlen(str) + 1;
  900 
  901         return 0;
  902 }
  903 
  904 static int
  905 kvp_get_ip_info(int family, char *if_name, int op,
  906                  void  *out_buffer, int length)
  907 {
  908         struct ifaddrs *ifap;
  909         struct ifaddrs *curp;
  910         int offset = 0;
  911         int sn_offset = 0;
  912         int error = 0;
  913         char *buffer;
  914         struct hv_kvp_ipaddr_value *ip_buffer;
  915         char cidr_mask[5]; /* /xyz */
  916         int weight;
  917         int i;
  918         unsigned int *w;
  919         char *sn_str;
  920         struct sockaddr_in6 *addr6;
  921 
  922         if (op == KVP_OP_ENUMERATE) {
  923                 buffer = out_buffer;
  924         } else {
  925                 ip_buffer = out_buffer;
  926                 buffer = (char *)ip_buffer->ip_addr;
  927                 ip_buffer->addr_family = 0;
  928         }
  929         /*
  930          * On entry into this function, the buffer is capable of holding the
  931          * maximum key value.
  932          */
  933 
  934         if (getifaddrs(&ifap)) {
  935                 strcpy(buffer, "getifaddrs failed\n");
  936                 return HV_E_FAIL;
  937         }
  938 
  939         curp = ifap;
  940         while (curp != NULL) {
  941                 if (curp->ifa_addr == NULL) {
  942                         curp = curp->ifa_next;
  943                         continue;
  944                 }
  945 
  946                 if ((if_name != NULL) &&
  947                         (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
  948                         /*
  949                          * We want info about a specific interface;
  950                          * just continue.
  951                          */
  952                         curp = curp->ifa_next;
  953                         continue;
  954                 }
  955 
  956                 /*
  957                  * We only support two address families: AF_INET and AF_INET6.
  958                  * If a family value of 0 is specified, we collect both
  959                  * supported address families; if not we gather info on
  960                  * the specified address family.
  961                  */
  962                 if ((((family != 0) &&
  963                          (curp->ifa_addr->sa_family != family))) ||
  964                          (curp->ifa_flags & IFF_LOOPBACK)) {
  965                         curp = curp->ifa_next;
  966                         continue;
  967                 }
  968                 if ((curp->ifa_addr->sa_family != AF_INET) &&
  969                         (curp->ifa_addr->sa_family != AF_INET6)) {
  970                         curp = curp->ifa_next;
  971                         continue;
  972                 }
  973 
  974                 if (op == KVP_OP_GET_IP_INFO) {
  975                         /*
  976                          * Gather info other than the IP address.
  977                          * IP address info will be gathered later.
  978                          */
  979                         if (curp->ifa_addr->sa_family == AF_INET) {
  980                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
  981                                 /*
  982                                  * Get subnet info.
  983                                  */
  984                                 error = kvp_process_ip_address(
  985                                                              curp->ifa_netmask,
  986                                                              AF_INET,
  987                                                              (char *)
  988                                                              ip_buffer->sub_net,
  989                                                              length,
  990                                                              &sn_offset);
  991                                 if (error)
  992                                         goto gather_ipaddr;
  993                         } else {
  994                                 ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
  995 
  996                                 /*
  997                                  * Get subnet info in CIDR format.
  998                                  */
  999                                 weight = 0;
 1000                                 sn_str = (char *)ip_buffer->sub_net;
 1001                                 addr6 = (struct sockaddr_in6 *)
 1002                                         curp->ifa_netmask;
 1003                                 w = addr6->sin6_addr.s6_addr32;
 1004 
 1005                                 for (i = 0; i < 4; i++)
 1006                                         weight += hweight32(&w[i]);
 1007 
 1008                                 sprintf(cidr_mask, "/%d", weight);
 1009                                 if ((length - sn_offset) <
 1010                                         (strlen(cidr_mask) + 1))
 1011                                         goto gather_ipaddr;
 1012 
 1013                                 if (sn_offset == 0)
 1014                                         strcpy(sn_str, cidr_mask);
 1015                                 else
 1016                                         strcat(sn_str, cidr_mask);
 1017                                 strcat((char *)ip_buffer->sub_net, ";");
 1018                                 sn_offset += strlen(sn_str) + 1;
 1019                         }
 1020 
 1021                         /*
 1022                          * Collect other ip related configuration info.
 1023                          */
 1024 
 1025                         kvp_get_ipconfig_info(if_name, ip_buffer);
 1026                 }
 1027 
 1028 gather_ipaddr:
 1029                 error = kvp_process_ip_address(curp->ifa_addr,
 1030                                                 curp->ifa_addr->sa_family,
 1031                                                 buffer,
 1032                                                 length, &offset);
 1033                 if (error)
 1034                         goto getaddr_done;
 1035 
 1036                 curp = curp->ifa_next;
 1037         }
 1038 
 1039 getaddr_done:
 1040         freeifaddrs(ifap);
 1041         return error;
 1042 }
 1043 
 1044 
 1045 static int expand_ipv6(char *addr, int type)
 1046 {
 1047         int ret;
 1048         struct in6_addr v6_addr;
 1049 
 1050         ret = inet_pton(AF_INET6, addr, &v6_addr);
 1051 
 1052         if (ret != 1) {
 1053                 if (type == NETMASK)
 1054                         return 1;
 1055                 return 0;
 1056         }
 1057 
 1058         sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
 1059                 "%02x%02x:%02x%02x:%02x%02x",
 1060                 (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
 1061                 (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
 1062                 (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
 1063                 (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
 1064                 (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
 1065                 (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
 1066                 (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
 1067                 (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
 1068 
 1069         return 1;
 1070 
 1071 }
 1072 
 1073 static int is_ipv4(char *addr)
 1074 {
 1075         int ret;
 1076         struct in_addr ipv4_addr;
 1077 
 1078         ret = inet_pton(AF_INET, addr, &ipv4_addr);
 1079 
 1080         if (ret == 1)
 1081                 return 1;
 1082         return 0;
 1083 }
 1084 
 1085 static int parse_ip_val_buffer(char *in_buf, int *offset,
 1086                                 char *out_buf, int out_len)
 1087 {
 1088         char *x;
 1089         char *start;
 1090 
 1091         /*
 1092          * in_buf has sequence of characters that are seperated by
 1093          * the character ';'. The last sequence does not have the
 1094          * terminating ";" character.
 1095          */
 1096         start = in_buf + *offset;
 1097 
 1098         x = strchr(start, ';');
 1099         if (x)
 1100                 *x = 0;
 1101         else
 1102                 x = start + strlen(start);
 1103 
 1104         if (strlen(start) != 0) {
 1105                 int i = 0;
 1106                 /*
 1107                  * Get rid of leading spaces.
 1108                  */
 1109                 while (start[i] == ' ')
 1110                         i++;
 1111 
 1112                 if ((x - start) <= out_len) {
 1113                         strcpy(out_buf, (start + i));
 1114                         *offset += (x - start) + 1;
 1115                         return 1;
 1116                 }
 1117         }
 1118         return 0;
 1119 }
 1120 
 1121 static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
 1122 {
 1123         int ret;
 1124 
 1125         ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
 1126 
 1127         if (ret < 0)
 1128                 return HV_E_FAIL;
 1129 
 1130         return 0;
 1131 }
 1132 
 1133 
 1134 static int process_ip_string(FILE *f, char *ip_string, int type)
 1135 {
 1136         int error = 0;
 1137         char addr[INET6_ADDRSTRLEN];
 1138         int i = 0;
 1139         int j = 0;
 1140         char str[256];
 1141         char sub_str[10];
 1142         int offset = 0;
 1143 
 1144         memset(addr, 0, sizeof(addr));
 1145 
 1146         while (parse_ip_val_buffer(ip_string, &offset, addr,
 1147                                         (MAX_IP_ADDR_SIZE * 2))) {
 1148 
 1149                 sub_str[0] = 0;
 1150                 if (is_ipv4(addr)) {
 1151                         switch (type) {
 1152                         case IPADDR:
 1153                                 snprintf(str, sizeof(str), "%s", "IPADDR");
 1154                                 break;
 1155                         case NETMASK:
 1156                                 snprintf(str, sizeof(str), "%s", "NETMASK");
 1157                                 break;
 1158                         case GATEWAY:
 1159                                 snprintf(str, sizeof(str), "%s", "GATEWAY");
 1160                                 break;
 1161                         case DNS:
 1162                                 snprintf(str, sizeof(str), "%s", "DNS");
 1163                                 break;
 1164                         }
 1165                         if (i != 0) {
 1166                                 if (type != DNS) {
 1167                                         snprintf(sub_str, sizeof(sub_str),
 1168                                                 "_%d", i++);
 1169                                 } else {
 1170                                         snprintf(sub_str, sizeof(sub_str),
 1171                                                 "%d", ++i);
 1172                                 }
 1173                         } else if (type == DNS) {
 1174                                 snprintf(sub_str, sizeof(sub_str), "%d", ++i);
 1175                         }
 1176 
 1177 
 1178                 } else if (expand_ipv6(addr, type)) {
 1179                         switch (type) {
 1180                         case IPADDR:
 1181                                 snprintf(str, sizeof(str), "%s", "IPV6ADDR");
 1182                                 break;
 1183                         case NETMASK:
 1184                                 snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
 1185                                 break;
 1186                         case GATEWAY:
 1187                                 snprintf(str, sizeof(str), "%s",
 1188                                         "IPV6_DEFAULTGW");
 1189                                 break;
 1190                         case DNS:
 1191                                 snprintf(str, sizeof(str), "%s",  "DNS");
 1192                                 break;
 1193                         }
 1194                         if ((j != 0) || (type == DNS)) {
 1195                                 if (type != DNS) {
 1196                                         snprintf(sub_str, sizeof(sub_str),
 1197                                                 "_%d", j++);
 1198                                 } else {
 1199                                         snprintf(sub_str, sizeof(sub_str),
 1200                                                 "%d", ++i);
 1201                                 }
 1202                         } else if (type == DNS) {
 1203                                 snprintf(sub_str, sizeof(sub_str),
 1204                                         "%d", ++i);
 1205                         }
 1206                 } else {
 1207                         return  HV_INVALIDARG;
 1208                 }
 1209 
 1210                 error = kvp_write_file(f, str, sub_str, addr);
 1211                 if (error)
 1212                         return error;
 1213                 memset(addr, 0, sizeof(addr));
 1214         }
 1215 
 1216         return 0;
 1217 }
 1218 
 1219 static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
 1220 {
 1221         int error = 0;
 1222         char if_file[128];
 1223         FILE *file;
 1224         char cmd[512];
 1225         char *mac_addr;
 1226 
 1227         /*
 1228          * Set the configuration for the specified interface with
 1229          * the information provided. Since there is no standard
 1230          * way to configure an interface, we will have an external
 1231          * script that does the job of configuring the interface and
 1232          * flushing the configuration.
 1233          *
 1234          * The parameters passed to this external script are:
 1235          * 1. A configuration file that has the specified configuration.
 1236          *
 1237          * We will embed the name of the interface in the configuration
 1238          * file: ifcfg-ethx (where ethx is the interface name).
 1239          *
 1240          * The information provided here may be more than what is needed
 1241          * in a given distro to configure the interface and so are free
 1242          * ignore information that may not be relevant.
 1243          *
 1244          * Here is the format of the ip configuration file:
 1245          *
 1246          * HWADDR=macaddr
 1247          * IF_NAME=interface name
 1248          * DHCP=yes (This is optional; if yes, DHCP is configured)
 1249          *
 1250          * IPADDR=ipaddr1
 1251          * IPADDR_1=ipaddr2
 1252          * IPADDR_x=ipaddry (where y = x + 1)
 1253          *
 1254          * NETMASK=netmask1
 1255          * NETMASK_x=netmasky (where y = x + 1)
 1256          *
 1257          * GATEWAY=ipaddr1
 1258          * GATEWAY_x=ipaddry (where y = x + 1)
 1259          *
 1260          * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
 1261          *
 1262          * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
 1263          * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
 1264          * IPV6NETMASK.
 1265          *
 1266          * The host can specify multiple ipv4 and ipv6 addresses to be
 1267          * configured for the interface. Furthermore, the configuration
 1268          * needs to be persistent. A subsequent GET call on the interface
 1269          * is expected to return the configuration that is set via the SET
 1270          * call.
 1271          */
 1272 
 1273         snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
 1274                 "hyperv/ifcfg-", if_name);
 1275 
 1276         file = fopen(if_file, "w");
 1277 
 1278         if (file == NULL) {
 1279                 syslog(LOG_ERR, "Failed to open config file");
 1280                 return HV_E_FAIL;
 1281         }
 1282 
 1283         /*
 1284          * First write out the MAC address.
 1285          */
 1286 
 1287         mac_addr = kvp_if_name_to_mac(if_name);
 1288         if (mac_addr == NULL) {
 1289                 error = HV_E_FAIL;
 1290                 goto setval_error;
 1291         }
 1292 
 1293         error = kvp_write_file(file, "HWADDR", "", mac_addr);
 1294         if (error)
 1295                 goto setval_error;
 1296 
 1297         error = kvp_write_file(file, "IF_NAME", "", if_name);
 1298         if (error)
 1299                 goto setval_error;
 1300 
 1301         if (new_val->dhcp_enabled) {
 1302                 error = kvp_write_file(file, "DHCP", "", "yes");
 1303                 if (error)
 1304                         goto setval_error;
 1305 
 1306                 /*
 1307                  * We are done!.
 1308                  */
 1309                 goto setval_done;
 1310         }
 1311 
 1312         /*
 1313          * Write the configuration for ipaddress, netmask, gateway and
 1314          * name servers.
 1315          */
 1316 
 1317         error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
 1318         if (error)
 1319                 goto setval_error;
 1320 
 1321         error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
 1322         if (error)
 1323                 goto setval_error;
 1324 
 1325         error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
 1326         if (error)
 1327                 goto setval_error;
 1328 
 1329         error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
 1330         if (error)
 1331                 goto setval_error;
 1332 
 1333 setval_done:
 1334         free(mac_addr);
 1335         fclose(file);
 1336 
 1337         /*
 1338          * Now that we have populated the configuration file,
 1339          * invoke the external script to do its magic.
 1340          */
 1341 
 1342         snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
 1343         system(cmd);
 1344         return 0;
 1345 
 1346 setval_error:
 1347         syslog(LOG_ERR, "Failed to write config file");
 1348         free(mac_addr);
 1349         fclose(file);
 1350         return error;
 1351 }
 1352 
 1353 
 1354 static int
 1355 kvp_get_domain_name(char *buffer, int length)
 1356 {
 1357         struct addrinfo hints, *info ;
 1358         int error = 0;
 1359 
 1360         gethostname(buffer, length);
 1361         memset(&hints, 0, sizeof(hints));
 1362         hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
 1363         hints.ai_socktype = SOCK_STREAM;
 1364         hints.ai_flags = AI_CANONNAME;
 1365 
 1366         error = getaddrinfo(buffer, NULL, &hints, &info);
 1367         if (error != 0) {
 1368                 strcpy(buffer, "getaddrinfo failed\n");
 1369                 return error;
 1370         }
 1371         strcpy(buffer, info->ai_canonname);
 1372         freeaddrinfo(info);
 1373         return error;
 1374 }
 1375 
 1376 static int
 1377 netlink_send(int fd, struct cn_msg *msg)
 1378 {
 1379         struct nlmsghdr *nlh;
 1380         unsigned int size;
 1381         struct msghdr message;
 1382         char buffer[64];
 1383         struct iovec iov[2];
 1384 
 1385         size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
 1386 
 1387         nlh = (struct nlmsghdr *)buffer;
 1388         nlh->nlmsg_seq = 0;
 1389         nlh->nlmsg_pid = getpid();
 1390         nlh->nlmsg_type = NLMSG_DONE;
 1391         nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
 1392         nlh->nlmsg_flags = 0;
 1393 
 1394         iov[0].iov_base = nlh;
 1395         iov[0].iov_len = sizeof(*nlh);
 1396 
 1397         iov[1].iov_base = msg;
 1398         iov[1].iov_len = size;
 1399 
 1400         memset(&message, 0, sizeof(message));
 1401         message.msg_name = &addr;
 1402         message.msg_namelen = sizeof(addr);
 1403         message.msg_iov = iov;
 1404         message.msg_iovlen = 2;
 1405 
 1406         return sendmsg(fd, &message, 0);
 1407 }
 1408 
 1409 int main(void)
 1410 {
 1411         int fd, len, sock_opt;
 1412         int error;
 1413         struct cn_msg *message;
 1414         struct pollfd pfd;
 1415         struct nlmsghdr *incoming_msg;
 1416         struct cn_msg   *incoming_cn_msg;
 1417         struct hv_kvp_msg *hv_msg;
 1418         char    *p;
 1419         char    *key_value;
 1420         char    *key_name;
 1421         int     op;
 1422         int     pool;
 1423         char    *if_name;
 1424         struct hv_kvp_ipaddr_value *kvp_ip_val;
 1425 
 1426         daemon(1, 0);
 1427         openlog("KVP", 0, LOG_USER);
 1428         syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
 1429         /*
 1430          * Retrieve OS release information.
 1431          */
 1432         kvp_get_os_info();
 1433 
 1434         if (kvp_file_init()) {
 1435                 syslog(LOG_ERR, "Failed to initialize the pools");
 1436                 exit(EXIT_FAILURE);
 1437         }
 1438 
 1439         fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
 1440         if (fd < 0) {
 1441                 syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
 1442                 exit(EXIT_FAILURE);
 1443         }
 1444         addr.nl_family = AF_NETLINK;
 1445         addr.nl_pad = 0;
 1446         addr.nl_pid = 0;
 1447         addr.nl_groups = CN_KVP_IDX;
 1448 
 1449 
 1450         error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
 1451         if (error < 0) {
 1452                 syslog(LOG_ERR, "bind failed; error:%d", error);
 1453                 close(fd);
 1454                 exit(EXIT_FAILURE);
 1455         }
 1456         sock_opt = addr.nl_groups;
 1457         setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt));
 1458         /*
 1459          * Register ourselves with the kernel.
 1460          */
 1461         message = (struct cn_msg *)kvp_send_buffer;
 1462         message->id.idx = CN_KVP_IDX;
 1463         message->id.val = CN_KVP_VAL;
 1464 
 1465         hv_msg = (struct hv_kvp_msg *)message->data;
 1466         hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
 1467         message->ack = 0;
 1468         message->len = sizeof(struct hv_kvp_msg);
 1469 
 1470         len = netlink_send(fd, message);
 1471         if (len < 0) {
 1472                 syslog(LOG_ERR, "netlink_send failed; error:%d", len);
 1473                 close(fd);
 1474                 exit(EXIT_FAILURE);
 1475         }
 1476 
 1477         pfd.fd = fd;
 1478 
 1479         while (1) {
 1480                 struct sockaddr *addr_p = (struct sockaddr *) &addr;
 1481                 socklen_t addr_l = sizeof(addr);
 1482                 pfd.events = POLLIN;
 1483                 pfd.revents = 0;
 1484                 poll(&pfd, 1, -1);
 1485 
 1486                 len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
 1487                                 addr_p, &addr_l);
 1488 
 1489                 if (len < 0) {
 1490                         syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
 1491                                         addr.nl_pid, errno, strerror(errno));
 1492                         close(fd);
 1493                         return -1;
 1494                 }
 1495 
 1496                 if (addr.nl_pid) {
 1497                         syslog(LOG_WARNING, "Received packet from untrusted pid:%u",
 1498                                         addr.nl_pid);
 1499                         continue;
 1500                 }
 1501 
 1502                 incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
 1503                 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
 1504                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
 1505 
 1506                 /*
 1507                  * We will use the KVP header information to pass back
 1508                  * the error from this daemon. So, first copy the state
 1509                  * and set the error code to success.
 1510                  */
 1511                 op = hv_msg->kvp_hdr.operation;
 1512                 pool = hv_msg->kvp_hdr.pool;
 1513                 hv_msg->error = HV_S_OK;
 1514 
 1515                 if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
 1516                         /*
 1517                          * Driver is registering with us; stash away the version
 1518                          * information.
 1519                          */
 1520                         in_hand_shake = 0;
 1521                         p = (char *)hv_msg->body.kvp_register.version;
 1522                         lic_version = malloc(strlen(p) + 1);
 1523                         if (lic_version) {
 1524                                 strcpy(lic_version, p);
 1525                                 syslog(LOG_INFO, "KVP LIC Version: %s",
 1526                                         lic_version);
 1527                         } else {
 1528                                 syslog(LOG_ERR, "malloc failed");
 1529                         }
 1530                         continue;
 1531                 }
 1532 
 1533                 switch (op) {
 1534                 case KVP_OP_GET_IP_INFO:
 1535                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
 1536                         if_name =
 1537                         kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
 1538 
 1539                         if (if_name == NULL) {
 1540                                 /*
 1541                                  * We could not map the mac address to an
 1542                                  * interface name; return error.
 1543                                  */
 1544                                 hv_msg->error = HV_E_FAIL;
 1545                                 break;
 1546                         }
 1547                         error = kvp_get_ip_info(
 1548                                                 0, if_name, KVP_OP_GET_IP_INFO,
 1549                                                 kvp_ip_val,
 1550                                                 (MAX_IP_ADDR_SIZE * 2));
 1551 
 1552                         if (error)
 1553                                 hv_msg->error = error;
 1554 
 1555                         free(if_name);
 1556                         break;
 1557 
 1558                 case KVP_OP_SET_IP_INFO:
 1559                         kvp_ip_val = &hv_msg->body.kvp_ip_val;
 1560                         if_name = kvp_get_if_name(
 1561                                         (char *)kvp_ip_val->adapter_id);
 1562                         if (if_name == NULL) {
 1563                                 /*
 1564                                  * We could not map the guid to an
 1565                                  * interface name; return error.
 1566                                  */
 1567                                 hv_msg->error = HV_GUID_NOTFOUND;
 1568                                 break;
 1569                         }
 1570                         error = kvp_set_ip_info(if_name, kvp_ip_val);
 1571                         if (error)
 1572                                 hv_msg->error = error;
 1573 
 1574                         free(if_name);
 1575                         break;
 1576 
 1577                 case KVP_OP_SET:
 1578                         if (kvp_key_add_or_modify(pool,
 1579                                         hv_msg->body.kvp_set.data.key,
 1580                                         hv_msg->body.kvp_set.data.key_size,
 1581                                         hv_msg->body.kvp_set.data.value,
 1582                                         hv_msg->body.kvp_set.data.value_size))
 1583                                         hv_msg->error = HV_S_CONT;
 1584                         break;
 1585 
 1586                 case KVP_OP_GET:
 1587                         if (kvp_get_value(pool,
 1588                                         hv_msg->body.kvp_set.data.key,
 1589                                         hv_msg->body.kvp_set.data.key_size,
 1590                                         hv_msg->body.kvp_set.data.value,
 1591                                         hv_msg->body.kvp_set.data.value_size))
 1592                                         hv_msg->error = HV_S_CONT;
 1593                         break;
 1594 
 1595                 case KVP_OP_DELETE:
 1596                         if (kvp_key_delete(pool,
 1597                                         hv_msg->body.kvp_delete.key,
 1598                                         hv_msg->body.kvp_delete.key_size))
 1599                                         hv_msg->error = HV_S_CONT;
 1600                         break;
 1601 
 1602                 default:
 1603                         break;
 1604                 }
 1605 
 1606                 if (op != KVP_OP_ENUMERATE)
 1607                         goto kvp_done;
 1608 
 1609                 /*
 1610                  * If the pool is KVP_POOL_AUTO, dynamically generate
 1611                  * both the key and the value; if not read from the
 1612                  * appropriate pool.
 1613                  */
 1614                 if (pool != KVP_POOL_AUTO) {
 1615                         if (kvp_pool_enumerate(pool,
 1616                                         hv_msg->body.kvp_enum_data.index,
 1617                                         hv_msg->body.kvp_enum_data.data.key,
 1618                                         HV_KVP_EXCHANGE_MAX_KEY_SIZE,
 1619                                         hv_msg->body.kvp_enum_data.data.value,
 1620                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
 1621                                         hv_msg->error = HV_S_CONT;
 1622                         goto kvp_done;
 1623                 }
 1624 
 1625                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
 1626                 key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
 1627                 key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
 1628 
 1629                 switch (hv_msg->body.kvp_enum_data.index) {
 1630                 case FullyQualifiedDomainName:
 1631                         kvp_get_domain_name(key_value,
 1632                                         HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
 1633                         strcpy(key_name, "FullyQualifiedDomainName");
 1634                         break;
 1635                 case IntegrationServicesVersion:
 1636                         strcpy(key_name, "IntegrationServicesVersion");
 1637                         strcpy(key_value, lic_version);
 1638                         break;
 1639                 case NetworkAddressIPv4:
 1640                         kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
 1641                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
 1642                         strcpy(key_name, "NetworkAddressIPv4");
 1643                         break;
 1644                 case NetworkAddressIPv6:
 1645                         kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
 1646                                 key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
 1647                         strcpy(key_name, "NetworkAddressIPv6");
 1648                         break;
 1649                 case OSBuildNumber:
 1650                         strcpy(key_value, os_build);
 1651                         strcpy(key_name, "OSBuildNumber");
 1652                         break;
 1653                 case OSName:
 1654                         strcpy(key_value, os_name);
 1655                         strcpy(key_name, "OSName");
 1656                         break;
 1657                 case OSMajorVersion:
 1658                         strcpy(key_value, os_major);
 1659                         strcpy(key_name, "OSMajorVersion");
 1660                         break;
 1661                 case OSMinorVersion:
 1662                         strcpy(key_value, os_minor);
 1663                         strcpy(key_name, "OSMinorVersion");
 1664                         break;
 1665                 case OSVersion:
 1666                         strcpy(key_value, os_version);
 1667                         strcpy(key_name, "OSVersion");
 1668                         break;
 1669                 case ProcessorArchitecture:
 1670                         strcpy(key_value, processor_arch);
 1671                         strcpy(key_name, "ProcessorArchitecture");
 1672                         break;
 1673                 default:
 1674                         hv_msg->error = HV_S_CONT;
 1675                         break;
 1676                 }
 1677                 /*
 1678                  * Send the value back to the kernel. The response is
 1679                  * already in the receive buffer. Update the cn_msg header to
 1680                  * reflect the key value that has been added to the message
 1681                  */
 1682 kvp_done:
 1683 
 1684                 incoming_cn_msg->id.idx = CN_KVP_IDX;
 1685                 incoming_cn_msg->id.val = CN_KVP_VAL;
 1686                 incoming_cn_msg->ack = 0;
 1687                 incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
 1688 
 1689                 len = netlink_send(fd, incoming_cn_msg);
 1690                 if (len < 0) {
 1691                         syslog(LOG_ERR, "net_link send failed; error:%d", len);
 1692                         exit(EXIT_FAILURE);
 1693                 }
 1694         }
 1695 
 1696 }

Cache object: 6a7a0c7dae861f33255c9071ec2c847f


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.