src/chrony.c

   1 /* chrony plugin for collectd
   2    (c) 2015 by Claudius M Zingerli, ZSeng
   3    Internas roughly based on the ntpd plugin
   4    License: GPL2
   5 */
   6
   7 /* getaddrinfo */
   8 #include <sys/types.h>
   9 #include <sys/socket.h>
  10 #include <netdb.h>
  11
  12 #include "collectd.h"
  13 #include "common.h" /* auxiliary functions */
  14 #include "plugin.h" /* plugin_register_*, plugin_dispatch_values */
  15
  16 static const char *g_config_keys[] =
  17 {
  18         "Host",
  19         "Port",
  20         "Timeout"
  21 };
  22
  23 static int g_config_keys_num = STATIC_ARRAY_SIZE (g_config_keys);
  24
  25 # define CHRONY_DEFAULT_HOST "localhost"
  26 # define CHRONY_DEFAULT_PORT "323"
  27 # define CHRONY_DEFAULT_TIMEOUT 2
  28
  29 /* Copied from chrony/candm.h */
  30 /*BEGIN*/
  31 #define PROTO_VERSION_NUMBER 6
  32
  33 #define REQ_N_SOURCES 14
  34 #define REQ_SOURCE_DATA 15
  35 #define REQ_SOURCE_STATS 34
  36
  37 #define PKT_TYPE_CMD_REQUEST 1
  38 #define PKT_TYPE_CMD_REPLY 2
  39
  40 #define RPY_NULL 1
  41 #define RPY_N_SOURCES 2
  42 #define RPY_SOURCE_DATA 3
  43 #define RPY_MANUAL_TIMESTAMP 4
  44 #define RPY_TRACKING 5
  45 #define RPY_SOURCE_STATS 6
  46 #define RPY_RTC 7
  47
  48 #define IPADDR_UNSPEC 0
  49 #define IPADDR_INET4 1
  50 #define IPADDR_INET6 2
  51
  52 #define ATTRIB_PACKED __attribute__((packed))
  53 typedef struct ATTRIB_PACKED
  54 {
  55         int32_t f;
  56 } Float;
  57 /*END*/
  58
  59 typedef enum
  60 {
  61         STT_SUCCESS = 0,
  62         STT_FAILED  = 1,
  63         STT_UNAUTH  = 2,
  64         STT_INVALID = 3,
  65         STT_NOSUCHSOURCE = 4,
  66         STT_INVALIDTS  = 5,
  67         STT_NOTENABLED = 6,
  68         STT_BADSUBNET  = 7,
  69         STT_ACCESSALLOWED = 8,
  70         STT_ACCESSDENIED  = 9,
  71         STT_NOHOSTACCESS  = 10,
  72         STT_SOURCEALREADYKNOWN = 11,
  73         STT_TOOMANYSOURCES = 12,
  74         STT_NORTC      = 13,
  75         STT_BADRTCFILE = 14,
  76         STT_INACTIVE   = 15,
  77         STT_BADSAMPLE  = 16,
  78         STT_INVALIDAF  = 17,
  79         STT_BADPKTVERSION = 18,
  80         STT_BADPKTLENGTH = 19,
  81 } eChrony_Status;
  82
  83 typedef struct ATTRIB_PACKED
  84 {
  85         uint32_t f_n_sources;
  86 } tChrony_N_Sources;
  87
  88 typedef struct ATTRIB_PACKED
  89 {
  90         int32_t f_index;
  91         uint8_t f_dummy0[44];
  92 } tChrony_Req_Source_data;
  93
  94 typedef struct ATTRIB_PACKED
  95 {
  96         int32_t f_index;
  97         uint8_t f_dummy0[56];
  98 } tChrony_Req_Source_stats;
  99
 100 #define IPV6_STR_MAX_SIZE 40
 101 typedef struct ATTRIB_PACKED
 102 {
 103         union
 104         {
 105                 uint32_t ip4;
 106                 uint8_t ip6[16];
 107         } addr;
 108         uint16_t f_family;
 109 } tChrony_IPAddr;
 110
 111 typedef struct ATTRIB_PACKED
 112 {
 113         tChrony_IPAddr addr;
 114         uint16_t dummy; /* FIXME: Strange dummy space. Needed on gcc 4.8.3 on x86_64 */
 115         int16_t  f_poll;
 116         uint16_t f_stratum;
 117         uint16_t f_state;
 118         uint16_t f_mode;
 119         uint16_t f_flags;
 120         uint16_t f_reachability;
 121
 122         uint32_t f_since_sample;
 123         Float f_origin_latest_meas;
 124         Float f_latest_meas;
 125         Float f_latest_meas_err;
 126 } tChrony_Resp_Source_data;
 127
 128 typedef struct ATTRIB_PACKED
 129 {
 130         uint32_t f_ref_id;
 131         tChrony_IPAddr addr;
 132         uint16_t dummy; /* FIXME: Strange dummy space. Needed on gcc 4.8.3 on x86_64 */
 133         uint32_t f_n_samples; //Number of measurements done
 134         uint32_t f_n_runs; //How many measurements to come
 135         uint32_t f_span_seconds; //For how long we're measuring
 136         Float f_rtc_seconds_fast;
 137         Float f_rtc_gain_rate_ppm; //Estimated relative frequency error
 138         Float f_skew_ppm; //Clock skew
 139         Float f_est_offset; //Estimated offset of source
 140         Float f_est_offset_err; //Error of estimation
 141 } tChrony_Resp_Source_stats;
 142
 143
 144 typedef struct ATTRIB_PACKED
 145 {
 146         struct
 147         {
 148                 uint8_t f_version;
 149                 uint8_t f_type;
 150                 uint8_t f_dummy0;
 151                 uint8_t f_dummy1;
 152                 uint16_t f_cmd;
 153                 uint16_t f_cmd_try;
 154                 uint32_t f_seq;
 155
 156                 uint32_t f_dummy2;
 157                 uint32_t f_dummy3;
 158         } header; /* Packed: 20Bytes */
 159         union
 160         {
 161                 tChrony_N_Sources n_sources; /* Packed: 4 Bytes */
 162                 tChrony_Req_Source_data source_data;
 163                 tChrony_Req_Source_stats source_stats;
 164         } body;
 165         uint8_t padding[4+16]; /* Padding to match minimal response size */
 166 } tChrony_Request;
 167
 168 typedef struct ATTRIB_PACKED
 169 {
 170         struct
 171         {
 172                 uint8_t f_version;
 173                 uint8_t f_type;
 174                 uint8_t f_dummy0;
 175                 uint8_t f_dummy1;
 176                 uint16_t f_cmd;
 177                 uint16_t f_reply;
 178                 uint16_t f_status;
 179                 uint16_t f_dummy2;
 180                 uint16_t f_dummy3;
 181                 uint16_t f_dummy4;
 182                 uint32_t f_seq;
 183                 uint32_t f_dummy5;
 184                 uint32_t f_dummy6;
 185         } header; /* Packed: 28 Bytes */
 186
 187         /*uint32_t EOR;*/
 188
 189         union
 190         {
 191                 tChrony_N_Sources n_sources;
 192                 tChrony_Resp_Source_data source_data;
 193                 tChrony_Resp_Source_stats source_stats;
 194         } body;
 195
 196         uint8_t padding[1024];
 197 } tChrony_Response;
 198
 199 static int g_is_connected = 0;
 200 static int g_chrony_socket = -1;
 201 static time_t g_chrony_timeout = 0;
 202 static char *g_chrony_host = NULL;
 203 static char *g_chrony_port = NULL;
 204 static uint32_t g_chrony_seq = 0;
 205
 206 /*****************************************************************************/
 207 /* Internal functions */
 208 /*****************************************************************************/
 209 /* Code from: http://long.ccaba.upc.edu/long/045Guidelines/eva/ipv6.html#daytimeClient6 */
 210 /*BEGIN*/
 211 static int
 212 connect_client (const char *hostname,
 213                 const char *service,
 214                 int         family,
 215                 int         socktype)
 216 {
 217         struct addrinfo hints, *res, *ressave;
 218         int n, sockfd;
 219
 220         memset(&hints, 0, sizeof(struct addrinfo));
 221
 222         hints.ai_family = family;
 223         hints.ai_socktype = socktype;
 224
 225         n = getaddrinfo(hostname, service, &hints, &res);
 226
 227         if (n <0)
 228         {
 229                 ERROR ("chrony plugin: getaddrinfo error:: [%s]", gai_strerror(n));
 230                 return -1;
 231         }
 232
 233         ressave = res;
 234
 235         sockfd=-1;
 236         while (res)
 237         {
 238                 sockfd = socket(res->ai_family,
 239                 res->ai_socktype,
 240                 res->ai_protocol);
 241
 242                 if (!(sockfd < 0))
 243                 {
 244                         if (connect(sockfd, res->ai_addr, res->ai_addrlen) == 0)
 245                         {
 246                                 break;
 247                         }
 248
 249                         close(sockfd);
 250                         sockfd=-1;
 251                 }
 252                 res=res->ai_next;
 253         }
 254
 255         freeaddrinfo(ressave);
 256         return sockfd;
 257 }
 258 /*Code originally from: https://github.com/mlichvar/chrony/blob/master/util.c */
 259 /*char * UTI_IPToString(IPAddr *addr)*/
 260 char * niptoha(const tChrony_IPAddr *addr,char *p_buf, size_t p_buf_size)
 261 {
 262         unsigned long a, b, c, d, ip;
 263         const uint8_t *ip6;
 264
 265         switch (ntohs(addr->f_family))
 266         {
 267         case IPADDR_UNSPEC:
 268                 snprintf(p_buf, p_buf_size, "[UNSPEC]");
 269         break;
 270         case IPADDR_INET4:
 271                 ip = ntohl(addr->addr.ip4);
 272                 a = (ip>>24) & 0xff;
 273                 b = (ip>>16) & 0xff;
 274                 c = (ip>> 8) & 0xff;
 275                 d = (ip>> 0) & 0xff;
 276                 snprintf(p_buf, p_buf_size, "%ld.%ld.%ld.%ld", a, b, c, d);
 277         break;
 278         case IPADDR_INET6:
 279                 ip6 = addr->addr.ip6;
 280 #if 0
 281 /* FIXME: Detect little endian systems */
 282                 snprintf(p_buf, p_buf_size, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x",
 283                         ip6[0], ip6[1], ip6[2], ip6[3], ip6[4], ip6[5], ip6[6], ip6[7],
 284                         ip6[8], ip6[9], ip6[10], ip6[11], ip6[12], ip6[13], ip6[14], ip6[15]);
 285 #else
 286                 snprintf(p_buf, p_buf_size, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x",
 287                         ip6[5], ip6[4], ip6[3], ip6[2], ip6[1], ip6[0], ip6[9], ip6[8],
 288                         ip6[7], ip6[6], ip6[5], ip6[4], ip6[3], ip6[2], ip6[1], ip6[0]);
 289 #endif
 290         break;
 291         default:
 292                 snprintf(p_buf, p_buf_size, "[UNKNOWN]");
 293         }
 294         return p_buf;
 295 }
 296 /*END*/
 297
 298 static int chrony_set_timeout()
 299 {
 300         struct timeval tv;
 301         tv.tv_sec  = g_chrony_timeout;
 302         tv.tv_usec = 0;
 303
 304         assert(g_chrony_socket>=0);
 305         if (setsockopt(g_chrony_socket, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv,sizeof(struct timeval)) < 0)
 306         {
 307                 return (1);
 308         }
 309         return (0);
 310 }
 311
 312 static int chrony_connect()
 313 {
 314         if (g_chrony_host == NULL)
 315         {
 316                 g_chrony_host = strdup(CHRONY_DEFAULT_HOST);
 317         }
 318         if (g_chrony_port == NULL)
 319         {
 320                 g_chrony_port = strdup(CHRONY_DEFAULT_PORT);
 321         }
 322         if (g_chrony_timeout <= 0)
 323         {
 324                 g_chrony_timeout = CHRONY_DEFAULT_TIMEOUT;
 325         }
 326
 327
 328         DEBUG("chrony plugin: Connecting to %s:%s", g_chrony_host, g_chrony_port);
 329         int socket = connect_client(g_chrony_host, g_chrony_port,  AF_UNSPEC, SOCK_DGRAM);
 330         if (socket < 0)
 331         {
 332                 ERROR ("chrony plugin: Error connecting to daemon. Errno = %d", errno);
 333                 return (1);
 334         }
 335         DEBUG("chrony plugin: Connected");
 336         g_chrony_socket = socket;
 337
 338         if (chrony_set_timeout())
 339         {
 340                 ERROR ("chrony plugin: Error setting timeout to %lds. Errno = %d", g_chrony_timeout, errno);
 341                 return (1);
 342         }
 343         return (0);
 344 }
 345
 346 static int chrony_send_request(const tChrony_Request *p_req, size_t p_req_size)
 347 {
 348         if (send(g_chrony_socket,p_req,p_req_size,0) < 0)
 349         {
 350                 ERROR ("chrony plugin: Error sending packet. Errno = %d", errno);
 351                 return (1);
 352         } else {
 353                 return (0);
 354         }
 355 }
 356
 357 static int chrony_recv_response(tChrony_Response *p_resp, size_t p_resp_max_size, size_t *p_resp_size)
 358 {
 359         ssize_t rc = recv(g_chrony_socket,p_resp,p_resp_max_size,0);
 360         if (rc <= 0)
 361         {
 362                 ERROR ("chrony plugin: Error receiving packet. Errno = %d", errno);
 363                 return (1);
 364         } else {
 365 #if 0
 366                 if (rc < p_resp_max_size)
 367                 {
 368                         ERROR ("chrony plugin: Received too small response packet. (Should: %ld, was: %ld)", p_resp_max_size, rc);
 369                         return (1);
 370                 }
 371 #endif
 372                 *p_resp_size = rc;
 373                 return (0);
 374         }
 375 }
 376
 377 static int chrony_query(int p_command, tChrony_Request *p_req, tChrony_Response *p_resp, size_t *p_resp_size)
 378 {
 379         /* Check connection. We simply perform one try as collectd already handles retries */
 380         assert(p_req);
 381         assert(p_resp);
 382         assert(p_resp_size);
 383         if (g_is_connected == 0)
 384         {
 385                 if (chrony_connect() == 0)
 386                 {
 387                         g_is_connected = 1;
 388                 } else {
 389                         ERROR ("chrony plugin: Unable to connect. Errno = %d", errno);
 390                         return 1;
 391                 }
 392         }
 393
 394
 395         do
 396         {
 397                 int valid_command = 0;
 398                 size_t req_size = sizeof(p_req->header) + sizeof(p_req->padding);
 399                 size_t resp_size = sizeof(p_resp->header);
 400                 uint16_t resp_code = RPY_NULL;
 401                 switch (p_command)
 402                 {
 403                 case REQ_N_SOURCES:
 404                         req_size  += sizeof(p_req->body.n_sources);
 405                         resp_size += sizeof(p_resp->body.n_sources);
 406                         resp_code = RPY_N_SOURCES;
 407                         valid_command = 1;
 408                         break;
 409                 case REQ_SOURCE_DATA:
 410                         req_size  += sizeof(p_req->body.source_data);
 411                         resp_size += sizeof(p_resp->body.source_data);
 412                         resp_code = RPY_SOURCE_DATA;
 413                         valid_command = 1;
 414                         break;
 415                 case REQ_SOURCE_STATS:
 416                         req_size  += sizeof(p_req->body.source_stats);
 417                         resp_size += sizeof(p_resp->body.source_stats);
 418                         resp_code = RPY_SOURCE_STATS;
 419                         valid_command = 1;
 420                         break;
 421                 default:
 422                         ERROR ("chrony plugin: Unknown request command (Was: %d)", p_command);
 423                         break;
 424                 }
 425
 426                 if (valid_command == 0)
 427                 {
 428                         break;
 429                 }
 430
 431                 p_req->header.f_cmd     = htons(p_command);
 432                 p_req->header.f_cmd_try = 0;
 433                 p_req->header.f_seq     = htonl(g_chrony_seq++);
 434
 435                 DEBUG("chrony plugin: Sending request");
 436                 if (chrony_send_request(p_req,req_size) != 0)
 437                 {
 438                         break;
 439                 }
 440
 441                 DEBUG("chrony plugin: Waiting for response");
 442                 if (chrony_recv_response(p_resp,resp_size,p_resp_size) != 0)
 443                 {
 444                         break;
 445                 }
 446                 DEBUG("chrony plugin: Received response: .version = %u, .type = %u, .cmd = %u, .reply = %u, .status = %u, .seq = %u",p_resp->header.f_version,p_resp->header.f_type,ntohs(p_resp->header.f_cmd),ntohs(p_resp->header.f_reply),ntohs(p_resp->header.f_status),ntohl(p_resp->header.f_seq));
 447
 448                 if (p_resp->header.f_version != p_req->header.f_version)
 449                 {
 450                         ERROR("chrony plugin: Wrong protocol version (Was: %d, expected: %d)", p_resp->header.f_version, p_req->header.f_version);
 451                         return 1;
 452                 }
 453                 if (p_resp->header.f_type != PKT_TYPE_CMD_REPLY)
 454                 {
 455                         ERROR("chrony plugin: Wrong packet type (Was: %d, expected: %d)", p_resp->header.f_type, PKT_TYPE_CMD_REPLY);
 456                         return 1;
 457                 }
 458                 if (p_resp->header.f_seq != p_req->header.f_seq)
 459                 {
 460                         /* FIXME: Implement sequence number handling */
 461                         ERROR("chrony plugin: Unexpected sequence number (Was: %d, expected: %d)", p_resp->header.f_seq, p_req->header.f_seq);
 462                         return 1;
 463                 }
 464                 if (p_resp->header.f_cmd != p_req->header.f_cmd)
 465                 {
 466                         ERROR("chrony plugin: Wrong reply command (Was: %d, expected: %d)", p_resp->header.f_cmd, p_req->header.f_cmd);
 467                         return 1;
 468                 }
 469
 470                 if (ntohs(p_resp->header.f_reply) !=  resp_code)
 471                 {
 472                         ERROR("chrony plugin: Wrong reply code (Was: %d, expected: %d)", ntohs(p_resp->header.f_reply), p_command);
 473                         return 1;
 474                 }
 475
 476                 switch (p_resp->header.f_status)
 477                 {
 478                 case STT_SUCCESS:
 479                         DEBUG("chrony plugin: Reply packet status STT_SUCCESS");
 480                         break;
 481                 default:
 482                         ERROR("chrony plugin: Reply packet contains error status: %d (expected: %d)", p_resp->header.f_status, STT_SUCCESS);
 483                         return (1);
 484                 }
 485                 return (0);
 486         } while (0);
 487
 488         return (1);
 489 }
 490
 491 static void chrony_init_req(tChrony_Request *p_req)
 492 {
 493         DEBUG("chrony plugin: Clearing %ld bytes",sizeof(*p_req));
 494         memset(p_req,0,sizeof(*p_req));
 495         p_req->header.f_version = PROTO_VERSION_NUMBER;
 496         p_req->header.f_type    = PKT_TYPE_CMD_REQUEST;
 497         p_req->header.f_dummy0  = 0;
 498         p_req->header.f_dummy1  = 0;
 499         p_req->header.f_dummy2  = 0;
 500         p_req->header.f_dummy3  = 0;
 501 }
 502
 503 /* Code from: https://github.com/mlichvar/chrony/blob/master/util.c (GPLv2) */
 504 /*BEGIN*/
 505 #define FLOAT_EXP_BITS 7
 506 #define FLOAT_EXP_MIN (-(1 << (FLOAT_EXP_BITS - 1)))
 507 #define FLOAT_EXP_MAX (-FLOAT_EXP_MIN - 1)
 508 #define FLOAT_COEF_BITS ((int)sizeof (int32_t) * 8 - FLOAT_EXP_BITS)
 509 #define FLOAT_COEF_MIN (-(1 << (FLOAT_COEF_BITS - 1)))
 510 #define FLOAT_COEF_MAX (-FLOAT_COEF_MIN - 1)
 511
 512 /* double UTI_FloatNetworkToHost(Float f) */
 513 double ntohf(Float f)
 514 {
 515   int32_t exp, coef, x;
 516
 517   x = ntohl(f.f);
 518   exp = (x >> FLOAT_COEF_BITS) - FLOAT_COEF_BITS;
 519   coef = x << FLOAT_EXP_BITS >> FLOAT_EXP_BITS;
 520   return coef * pow(2.0, exp);
 521 }
 522 /*END*/
 523
 524 /* Code from: collectd/src/ntpd.c (MIT) */
 525 /*BEGIN*/
 526 static void chrony_push_data(char *type, char *type_inst, double value)
 527 {
 528         value_t values[1];
 529         value_list_t vl = VALUE_LIST_INIT;
 530
 531         values[0].gauge = value;
 532
 533         vl.values = values;
 534         vl.values_len = 1;
 535         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 536         sstrncpy (vl.plugin, "chrony", sizeof (vl.plugin));
 537         sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
 538         sstrncpy (vl.type, type, sizeof (vl.type));
 539         sstrncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
 540
 541         plugin_dispatch_values (&vl);
 542 }
 543 /*END*/
 544
 545 /*****************************************************************************/
 546 /* Exported functions */
 547 /*****************************************************************************/
 548 static int chrony_config(const char *p_key, const char *p_value)
 549 {
 550         assert(p_key);
 551         assert(p_value);
 552         /* Parse config variables */
 553         if (strcasecmp(p_key, "Host") == 0)
 554         {
 555                 if (g_chrony_host != NULL)
 556                 {
 557                         free (g_chrony_host);
 558                 }
 559                 if ((g_chrony_host = strdup (p_value)) == NULL)
 560                 {
 561                         ERROR ("chrony plugin: Error duplicating host name");
 562                         return (1);
 563                 }
 564         } else if (strcasecmp(p_key, "Port") == 0)
 565         {
 566                 if (g_chrony_port != NULL)
 567                 {
 568                         free (g_chrony_port);
 569                 }
 570                 if ((g_chrony_port = strdup (p_value)) == NULL)
 571                 {
 572                         ERROR ("chrony plugin: Error duplicating port name");
 573                         return (1);
 574                 }
 575         } else if (strcasecmp(p_key, "Timeout") == 0)
 576         {
 577                 time_t tosec = strtol(p_value,NULL,0);
 578                 g_chrony_timeout = tosec;
 579         } else {
 580                 WARNING("chrony plugin: Unknown configuration variable: %s %s",p_key,p_value);
 581                 return (1);
 582         }
 583         return (0);
 584 }
 585
 586 static int chrony_read (void)
 587 {
 588         int status,now_src;
 589         char ip_addr_str0[ IPV6_STR_MAX_SIZE];
 590         char ip_addr_str1[IPV6_STR_MAX_SIZE];
 591
 592         size_t chrony_resp_size;
 593         tChrony_Request  chrony_req,chrony_req1;
 594         tChrony_Response chrony_resp,chrony_resp1;
 595
 596         DEBUG("chrony plugin: Requesting data");
 597         chrony_init_req(&chrony_req);
 598         status = chrony_query (REQ_N_SOURCES, &chrony_req, &chrony_resp, &chrony_resp_size);
 599         if (status != 0)
 600         {
 601                 ERROR ("chrony plugin: chrony_query (REQ_N_SOURCES) failed with status %i", status);
 602                 return (status);
 603         }
 604
 605         int n_sources = ntohl(chrony_resp.body.n_sources.f_n_sources);
 606         DEBUG("chrony plugin: Getting data of %d clock sources", n_sources);
 607
 608         for (now_src = 0; now_src < n_sources; ++now_src)
 609         {
 610                 chrony_init_req(&chrony_req);
 611                 chrony_init_req(&chrony_req1);
 612                 chrony_req.body.source_data.f_index = htonl(now_src);
 613                 chrony_req1.body.source_stats.f_index = htonl(now_src);
 614                 status = chrony_query(REQ_SOURCE_DATA, &chrony_req, &chrony_resp, &chrony_resp_size);
 615                 if (status != 0)
 616                 {
 617                         ERROR ("chrony plugin: chrony_query (REQ_SOURCE_DATA) failed with status %i", status);
 618                         return (status);
 619                 }
 620                 status = chrony_query(REQ_SOURCE_STATS, &chrony_req1, &chrony_resp1, &chrony_resp_size);
 621                 if (status != 0)
 622                 {
 623                         ERROR ("chrony plugin: chrony_query (REQ_SOURCE_STATS) failed with status %i", status);
 624                         return (status);
 625                 }
 626                 memset(ip_addr_str0,0,sizeof(ip_addr_str0));
 627                 niptoha(&chrony_resp.body.source_data.addr,ip_addr_str0,sizeof(ip_addr_str0));
 628                 DEBUG("chrony plugin: Source[%d] data: .addr = %s, .poll = %u, .stratum = %u, .state = %u, .mode = %u, .flags = %u, .reach = %u, .latest_meas_ago = %u, .orig_latest_meas = %f, .latest_meas = %f, .latest_meas_err = %f",
 629                         now_src,
 630                         ip_addr_str0,
 631                         ntohs(chrony_resp.body.source_data.f_poll),
 632                         ntohs(chrony_resp.body.source_data.f_stratum),
 633                         ntohs(chrony_resp.body.source_data.f_state),
 634                         ntohs(chrony_resp.body.source_data.f_mode),
 635                         ntohs(chrony_resp.body.source_data.f_flags),
 636                         ntohs(chrony_resp.body.source_data.f_reachability),
 637                         ntohl(chrony_resp.body.source_data.f_since_sample),
 638                         ntohf(chrony_resp.body.source_data.f_origin_latest_meas),
 639                         ntohf(chrony_resp.body.source_data.f_latest_meas),
 640                         ntohf(chrony_resp.body.source_data.f_latest_meas_err));
 641 #if 1
 642                 memset(ip_addr_str1,0,sizeof(ip_addr_str1));
 643                 niptoha(&chrony_resp1.body.source_stats.addr,ip_addr_str1,sizeof(ip_addr_str1));
 644                 DEBUG("chrony plugin: Source[%d] stat: .addr = %s, .ref_id= %u, .n_samples = %u, .n_runs = %u, .span_seconds = %u, .rtc_seconds_fast = %f, .rtc_gain_rate_ppm = %f, .skew_ppm= %f, .est_offset = %f, .est_offset_err = %f",
 645                         now_src,
 646                         ip_addr_str1,
 647                         ntohl(chrony_resp1.body.source_stats.f_ref_id),
 648                         ntohl(chrony_resp1.body.source_stats.f_n_samples),
 649                         ntohl(chrony_resp1.body.source_stats.f_n_runs),
 650                         ntohl(chrony_resp1.body.source_stats.f_span_seconds),
 651                         ntohf(chrony_resp1.body.source_stats.f_rtc_seconds_fast),
 652                         ntohf(chrony_resp1.body.source_stats.f_rtc_gain_rate_ppm),
 653                         ntohf(chrony_resp1.body.source_stats.f_skew_ppm),
 654                         ntohf(chrony_resp1.body.source_stats.f_est_offset),
 655                         ntohf(chrony_resp1.body.source_stats.f_est_offset_err));
 656 #endif
 657 #if 1
 658                 chrony_push_data("clock_stratum",     ip_addr_str0,ntohs(chrony_resp.body.source_data.f_stratum));
 659                 chrony_push_data("clock_state",       ip_addr_str0,ntohs(chrony_resp.body.source_data.f_state));
 660                 chrony_push_data("clock_mode",        ip_addr_str0,ntohs(chrony_resp.body.source_data.f_mode));
 661                 chrony_push_data("clock_reachability",ip_addr_str0,ntohs(chrony_resp.body.source_data.f_reachability));
 662                 chrony_push_data("clock_last_meas",   ip_addr_str0,ntohs(chrony_resp.body.source_data.f_since_sample));
 663                 chrony_push_data("clock_skew_ppm",    ip_addr_str1,ntohf(chrony_resp1.body.source_stats.f_skew_ppm));
 664                 chrony_push_data("frequency_error",   ip_addr_str1,ntohf(chrony_resp1.body.source_stats.f_rtc_gain_rate_ppm)); /* unit: ppm */
 665                 chrony_push_data("time_offset",       ip_addr_str1,ntohf(chrony_resp1.body.source_stats.f_est_offset)); /* unit: s */
 666 #endif
 667         }
 668         return (0);
 669 }
 670
 671 static int chrony_shutdown()
 672 {
 673         if (g_is_connected != 0)
 674         {
 675                 close(g_chrony_socket);
 676                 g_is_connected = 0;
 677         }
 678         if (g_chrony_host != NULL)
 679         {
 680                 free (g_chrony_host);
 681                 g_chrony_host = NULL;
 682         }
 683         if (g_chrony_port != NULL)
 684         {
 685                 free (g_chrony_port);
 686                 g_chrony_port = NULL;
 687         }
 688         return (0);
 689 }
 690
 691 void module_register (void)
 692 {
 693         plugin_register_config ("chrony", chrony_config, g_config_keys, g_config_keys_num);
 694         plugin_register_read ("chrony", chrony_read);
 695         plugin_register_shutdown ("chrony", chrony_shutdown);
 696 }