1 /* chrony plugin for collectd (monitoring of chrony time server daemon)
2 **********************************************************************
3 * Copyright (C) Claudius M Zingerli, ZSeng, 2015-2016
5 * Internals roughly based on the ntpd plugin
6 * Some functions copied from chronyd/web (as marked)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 * - More robust udp parsing (using offsets instead of structs?)
23 * -> Currently chrony parses its data the same way as we do (using structs)
24 * - Plausibility checks on values received
25 * -> Done at higher levels
29 #include "common.h" /* auxiliary functions */
30 #include "plugin.h" /* plugin_register_*, plugin_dispatch_values */
33 # include <netdb.h> /* struct addrinfo */
36 # include <arpa/inet.h> /* ntohs/ntohl */
40 #define CONFIG_KEY_HOST "Host"
41 #define CONFIG_KEY_PORT "Port"
42 #define CONFIG_KEY_TIMEOUT "Timeout"
44 #define URAND_DEVICE_PATH "/dev/urandom" /* Used to initialize seq nr generator */
45 #define RAND_DEVICE_PATH "/dev/random" /* Used to initialize seq nr generator (fall back) */
47 static const char *g_config_keys[] = {
53 static int g_config_keys_num = STATIC_ARRAY_SIZE(g_config_keys);
54 static int g_chrony_is_connected;
55 static int g_chrony_socket = -1;
56 static time_t g_chrony_timeout = -1;
57 static char *g_chrony_plugin_instance;
58 static char *g_chrony_host;
59 static char *g_chrony_port;
60 static uint32_t g_chrony_rand = 1;
61 static uint32_t g_chrony_seq_is_initialized;
63 #define PLUGIN_NAME_SHORT "chrony"
64 #define PLUGIN_NAME PLUGIN_NAME_SHORT " plugin"
65 #define DAEMON_NAME PLUGIN_NAME_SHORT
66 #define CHRONY_DEFAULT_HOST "localhost"
67 #define CHRONY_DEFAULT_PORT "323"
68 #define CHRONY_DEFAULT_TIMEOUT 2
70 /* Return codes (collectd expects non-zero on errors) */
71 #define CHRONY_RC_OK 0
72 #define CHRONY_RC_FAIL 1
74 /* Chronyd command packet variables adapted from chrony/candm.h (GPL2) */
75 #define PROTO_VERSION_NUMBER 6
76 #define IPADDR_UNSPEC 0
77 #define IPADDR_INET4 1
78 #define IPADDR_INET6 2
79 #define IPV6_STR_MAX_SIZE (8*4+7+1)
83 PKT_TYPE_CMD_REQUEST = 1,
84 PKT_TYPE_CMD_REPLY = 2
101 RPY_MANUAL_TIMESTAMP = 4,
103 RPY_SOURCE_STATS = 6,
108 #if defined(__GNUC__)
109 # /* GNU gcc extension to enforce struct packing. */
110 # define ATTRIB_PACKED __attribute__((packed))
112 # error Not defining packed attribute (unknown compiler)
113 # define ATTRIB_PACKED
116 typedef struct ATTRIB_PACKED
121 typedef struct ATTRIB_PACKED
123 uint32_t tv_sec_high;
134 STT_NOSUCHSOURCE = 4,
138 STT_ACCESSALLOWED = 8,
139 STT_ACCESSDENIED = 9,
140 STT_NOHOSTACCESS = 10,
141 STT_SOURCEALREADYKNOWN = 11,
142 STT_TOOMANYSOURCES = 12,
148 STT_BADPKTVERSION = 18,
149 STT_BADPKTLENGTH = 19
152 /* Chrony client request packets */
153 typedef struct ATTRIB_PACKED
155 uint8_t f_dummy0[80]; /* Chrony expects 80bytes dummy data (Avoiding UDP Amplification) */
156 } tChrony_Req_Tracking;
158 typedef struct ATTRIB_PACKED
160 uint32_t f_n_sources;
161 } tChrony_Req_N_Sources;
163 typedef struct ATTRIB_PACKED
166 uint8_t f_dummy0[44];
167 } tChrony_Req_Source_data;
169 typedef struct ATTRIB_PACKED
172 uint8_t f_dummy0[56];
173 } tChrony_Req_Source_stats;
175 typedef struct ATTRIB_PACKED
189 } header; /* Packed: 20Bytes */
192 tChrony_Req_N_Sources n_sources;
193 tChrony_Req_Source_data source_data;
194 tChrony_Req_Source_stats source_stats;
195 tChrony_Req_Tracking tracking;
197 uint8_t padding[4 + 16]; /* Padding to match minimal response size */
200 /* Chrony daemon response packets */
201 typedef struct ATTRIB_PACKED
203 uint32_t f_n_sources;
204 } tChrony_Resp_N_Sources;
206 typedef struct ATTRIB_PACKED
216 typedef struct ATTRIB_PACKED
219 uint16_t dummy; /* FIXME: Strange dummy space. Needed on gcc 4.8.3/clang 3.4.1 on x86_64 */
220 int16_t f_poll; /* 2^f_poll = Time between polls (s) */
221 uint16_t f_stratum; /* Remote clock stratum */
222 uint16_t f_state; /* 0 = RPY_SD_ST_SYNC, 1 = RPY_SD_ST_UNREACH, 2 = RPY_SD_ST_FALSETICKER */
223 /* 3 = RPY_SD_ST_JITTERY, 4 = RPY_SD_ST_CANDIDATE, 5 = RPY_SD_ST_OUTLIER */
224 uint16_t f_mode; /* 0 = RPY_SD_MD_CLIENT, 1 = RPY_SD_MD_PEER, 2 = RPY_SD_MD_REF */
225 uint16_t f_flags; /* unused */
226 uint16_t f_reachability; /* Bit mask of successfull tries to reach the source */
228 uint32_t f_since_sample; /* Time since last sample (s) */
229 tFloat f_origin_latest_meas; /* */
230 tFloat f_latest_meas; /* */
231 tFloat f_latest_meas_err; /* */
232 } tChrony_Resp_Source_data;
234 typedef struct ATTRIB_PACKED
238 uint16_t dummy; /* FIXME: Strange dummy space. Needed on gcc 4.8.3/clang 3.4.1 on x86_64 */
239 uint32_t f_n_samples; /* Number of measurements done */
240 uint32_t f_n_runs; /* How many measurements to come */
241 uint32_t f_span_seconds; /* For how long we're measuring */
242 tFloat f_rtc_seconds_fast; /* ??? */
243 tFloat f_rtc_gain_rate_ppm; /* Estimated relative frequency error */
244 tFloat f_skew_ppm; /* Clock skew (ppm) (worst case freq est error (skew: peak2peak)) */
245 tFloat f_est_offset; /* Estimated offset of source */
246 tFloat f_est_offset_err; /* Error of estimation */
247 } tChrony_Resp_Source_stats;
249 typedef struct ATTRIB_PACKED
253 uint16_t dummy; /* FIXME: Strange dummy space. Needed on gcc 4.8.3/clang 3.4.1 on x86_64 */
255 uint16_t f_leap_status;
257 tFloat f_current_correction;
258 tFloat f_last_offset;
261 tFloat f_resid_freq_ppm;
264 tFloat f_root_dispersion;
265 tFloat f_last_update_interval;
266 } tChrony_Resp_Tracking;
268 typedef struct ATTRIB_PACKED
285 } header; /* Packed: 28 Bytes */
289 tChrony_Resp_N_Sources n_sources;
290 tChrony_Resp_Source_data source_data;
291 tChrony_Resp_Source_stats source_stats;
292 tChrony_Resp_Tracking tracking;
295 uint8_t padding[1024];
299 /*****************************************************************************/
300 /* Internal functions */
301 /*****************************************************************************/
303 /* connect_client code adapted from: http://long.ccaba.upc.edu/long/045Guidelines/eva/ipv6.html#daytimeClient6 */
304 /* License granted by Eva M Castro via e-mail on 2016-02-18 under the terms of GPLv3 */
306 connect_client(const char *p_hostname,
307 const char *p_service, int p_family, int p_socktype)
309 struct addrinfo hints, *res = NULL, *ressave = NULL;
312 memset(&hints, 0, sizeof(struct addrinfo));
314 hints.ai_family = p_family;
315 hints.ai_socktype = p_socktype;
317 n = getaddrinfo(p_hostname, p_service, &hints, &res);
321 ERROR(PLUGIN_NAME ": getaddrinfo error:: [%s]", gai_strerror(n));
330 sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
334 if (connect(sockfd, res->ai_addr, res->ai_addrlen) == 0)
346 freeaddrinfo(ressave);
351 /* niptoha code originally from: git://git.tuxfamily.org/gitroot/chrony/chrony.git:util.c */
352 /* Original code licensed as GPLv2, by Richard P. Purnow, Miroslav Lichvar */
353 /* Original name: char * UTI_IPToString(IPAddr *addr)*/
355 niptoha(const tChrony_IPAddr * addr, char *p_buf, size_t p_buf_size)
358 unsigned long a, b, c, d, ip;
360 switch (ntohs(addr->f_family))
363 rc = snprintf(p_buf, p_buf_size, "[UNSPEC]");
366 ip = ntohl(addr->addr.ip4);
367 a = (ip >> 24) & 0xff;
368 b = (ip >> 16) & 0xff;
369 c = (ip >> 8) & 0xff;
370 d = (ip >> 0) & 0xff;
371 rc = snprintf(p_buf, p_buf_size, "%ld.%ld.%ld.%ld", a, b, c, d);
375 const char *rp = inet_ntop(AF_INET6, addr->addr.ip6, p_buf, p_buf_size);
378 ERROR(PLUGIN_NAME ": Error converting ipv6 address to string. Errno = %d", errno);
379 rc = snprintf(p_buf, p_buf_size, "[UNKNOWN]");
384 rc = snprintf(p_buf, p_buf_size, "[UNKNOWN]");
394 /* Set the socket's timeout to g_chrony_timeout; a value of 0 signals infinite timeout */
395 /* Returns 0 on success, !0 on error (check errno) */
398 tv.tv_sec = g_chrony_timeout;
401 assert(g_chrony_socket >= 0);
402 if (setsockopt(g_chrony_socket, SOL_SOCKET,
403 SO_RCVTIMEO, (char *) &tv, sizeof(struct timeval)) < 0)
405 return CHRONY_RC_FAIL;
414 /* Connects to the chrony daemon */
415 /* Returns 0 on success, !0 on error (check errno) */
418 if (g_chrony_host == NULL)
420 g_chrony_host = strdup(CHRONY_DEFAULT_HOST);
421 if (g_chrony_host == NULL)
423 ERROR(PLUGIN_NAME ": Error duplicating chrony host name");
424 return CHRONY_RC_FAIL;
427 if (g_chrony_port == NULL)
429 g_chrony_port = strdup(CHRONY_DEFAULT_PORT);
430 if (g_chrony_port == NULL)
432 ERROR(PLUGIN_NAME ": Error duplicating chrony port string");
433 return CHRONY_RC_FAIL;
436 if (g_chrony_timeout < 0)
438 g_chrony_timeout = CHRONY_DEFAULT_TIMEOUT;
439 assert(g_chrony_timeout >= 0);
442 DEBUG(PLUGIN_NAME ": Connecting to %s:%s", g_chrony_host, g_chrony_port);
443 socket = connect_client(g_chrony_host, g_chrony_port, AF_UNSPEC, SOCK_DGRAM);
446 ERROR(PLUGIN_NAME ": Error connecting to daemon. Errno = %d", errno);
447 return CHRONY_RC_FAIL;
449 DEBUG(PLUGIN_NAME ": Connected");
450 g_chrony_socket = socket;
452 if (chrony_set_timeout())
454 ERROR(PLUGIN_NAME ": Error setting timeout to %lds. Errno = %d",
455 g_chrony_timeout, errno);
456 return CHRONY_RC_FAIL;
463 chrony_send_request(const tChrony_Request * p_req, size_t p_req_size)
465 if (send(g_chrony_socket, p_req, p_req_size, 0) < 0)
467 ERROR(PLUGIN_NAME ": Error sending packet. Errno = %d", errno);
468 return CHRONY_RC_FAIL;
475 chrony_recv_response(tChrony_Response * p_resp, size_t p_resp_max_size,
476 size_t * p_resp_size)
478 ssize_t rc = recv(g_chrony_socket, p_resp, p_resp_max_size, 0);
481 ERROR(PLUGIN_NAME ": Error receiving packet: %s (%d)", strerror(errno),
483 return CHRONY_RC_FAIL;
494 chrony_query(const int p_command, tChrony_Request * p_req,
495 tChrony_Response * p_resp, size_t * p_resp_size)
497 /* Check connection. We simply perform one try as collectd already handles retries */
502 if (g_chrony_is_connected == 0)
504 if (chrony_connect() == CHRONY_RC_OK)
506 g_chrony_is_connected = 1;
510 ERROR(PLUGIN_NAME ": Unable to connect. Errno = %d", errno);
511 return CHRONY_RC_FAIL;
517 int valid_command = 0;
518 size_t req_size = sizeof(p_req->header) + sizeof(p_req->padding);
519 size_t resp_size = sizeof(p_resp->header);
520 uint16_t resp_code = RPY_NULL;
524 req_size += sizeof(p_req->body.tracking);
525 resp_size += sizeof(p_resp->body.tracking);
526 resp_code = RPY_TRACKING;
530 req_size += sizeof(p_req->body.n_sources);
531 resp_size += sizeof(p_resp->body.n_sources);
532 resp_code = RPY_N_SOURCES;
535 case REQ_SOURCE_DATA:
536 req_size += sizeof(p_req->body.source_data);
537 resp_size += sizeof(p_resp->body.source_data);
538 resp_code = RPY_SOURCE_DATA;
541 case REQ_SOURCE_STATS:
542 req_size += sizeof(p_req->body.source_stats);
543 resp_size += sizeof(p_resp->body.source_stats);
544 resp_code = RPY_SOURCE_STATS;
548 ERROR(PLUGIN_NAME ": Unknown request command (Was: %d)", p_command);
552 if (valid_command == 0)
555 uint32_t seq_nr = rand_r(&g_chrony_rand);
556 p_req->header.f_cmd = htons(p_command);
557 p_req->header.f_cmd_try = 0;
558 p_req->header.f_seq = seq_nr;
560 DEBUG(PLUGIN_NAME ": Sending request (.cmd = %d, .seq = %d)", p_command,
562 if (chrony_send_request(p_req, req_size) != 0)
565 DEBUG(PLUGIN_NAME ": Waiting for response");
566 if (chrony_recv_response(p_resp, resp_size, p_resp_size) != 0)
570 ": Received response: .version = %u, .type = %u, .cmd = %u, .reply = %u, .status = %u, .seq = %u",
571 p_resp->header.f_version, p_resp->header.f_type,
572 ntohs(p_resp->header.f_cmd), ntohs(p_resp->header.f_reply),
573 ntohs(p_resp->header.f_status), p_resp->header.f_seq);
575 if (p_resp->header.f_version != p_req->header.f_version)
577 ERROR(PLUGIN_NAME ": Wrong protocol version (Was: %d, expected: %d)",
578 p_resp->header.f_version, p_req->header.f_version);
579 return CHRONY_RC_FAIL;
581 if (p_resp->header.f_type != PKT_TYPE_CMD_REPLY)
583 ERROR(PLUGIN_NAME ": Wrong packet type (Was: %d, expected: %d)",
584 p_resp->header.f_type, PKT_TYPE_CMD_REPLY);
585 return CHRONY_RC_FAIL;
587 if (p_resp->header.f_seq != seq_nr)
589 /* FIXME: Implement sequence number handling */
591 ": Unexpected sequence number (Was: %d, expected: %d)",
592 p_resp->header.f_seq, p_req->header.f_seq);
593 return CHRONY_RC_FAIL;
595 if (p_resp->header.f_cmd != p_req->header.f_cmd)
597 ERROR(PLUGIN_NAME ": Wrong reply command (Was: %d, expected: %d)",
598 p_resp->header.f_cmd, p_req->header.f_cmd);
599 return CHRONY_RC_FAIL;
602 if (ntohs(p_resp->header.f_reply) != resp_code)
604 ERROR(PLUGIN_NAME ": Wrong reply code (Was: %d, expected: %d)",
605 ntohs(p_resp->header.f_reply), resp_code);
606 return CHRONY_RC_FAIL;
609 switch (p_resp->header.f_status)
612 DEBUG(PLUGIN_NAME ": Reply packet status STT_SUCCESS");
616 ": Reply packet contains error status: %d (expected: %d)",
617 p_resp->header.f_status, STT_SUCCESS);
618 return CHRONY_RC_FAIL;
626 /* Some error occured */
627 return CHRONY_RC_FAIL;
632 chrony_init_req(tChrony_Request * p_req)
634 memset(p_req, 0, sizeof(*p_req));
635 p_req->header.f_version = PROTO_VERSION_NUMBER;
636 p_req->header.f_type = PKT_TYPE_CMD_REQUEST;
637 p_req->header.f_dummy0 = 0;
638 p_req->header.f_dummy1 = 0;
639 p_req->header.f_dummy2 = 0;
640 p_req->header.f_dummy3 = 0;
644 /* ntohf code originally from: git://git.tuxfamily.org/gitroot/chrony/chrony.git:util.c */
645 /* Original code licensed as GPLv2, by Richard P. Purnow, Miroslav Lichvar */
646 /* Original name: double UTI_tFloatNetworkToHost(tFloat f) */
648 ntohf(tFloat p_float)
650 /* Convert tFloat in Network-bit-order to double in host-bit-order */
652 #define FLOAT_EXP_BITS 7
653 #define FLOAT_EXP_MIN (-(1 << (FLOAT_EXP_BITS - 1)))
654 #define FLOAT_EXP_MAX (-FLOAT_EXP_MIN - 1)
655 #define FLOAT_COEF_BITS ((int)sizeof (int32_t) * 8 - FLOAT_EXP_BITS)
656 #define FLOAT_COEF_MIN (-(1 << (FLOAT_COEF_BITS - 1)))
657 #define FLOAT_COEF_MAX (-FLOAT_COEF_MIN - 1)
662 uval = ntohl(p_float.value);
663 exp = (uval >> FLOAT_COEF_BITS) - FLOAT_COEF_BITS;
664 if (exp >= 1 << (FLOAT_EXP_BITS - 1))
665 exp -= 1 << FLOAT_EXP_BITS;
667 /* coef = (x << FLOAT_EXP_BITS) >> FLOAT_EXP_BITS; */
668 coef = uval % (1U << FLOAT_COEF_BITS);
669 if (coef >= 1 << (FLOAT_COEF_BITS - 1))
670 coef -= 1 << FLOAT_COEF_BITS;
672 return coef * pow(2.0, exp);
677 chrony_push_data(char *p_type, char *p_type_inst, double p_value)
680 value_list_t vl = VALUE_LIST_INIT;
682 values[0].gauge = p_value; /* TODO: Check type??? (counter, gauge, derive, absolute) */
687 /* XXX: Shall g_chrony_host/g_chrony_port be reflected in the plugin's output? */
688 /* hostname_g is set in daemon/collectd.c (from config, via gethostname or by resolving localhost) */
689 /* defined as: char hostname_g[DATA_MAX_NAME_LEN]; (never NULL) */
690 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
691 sstrncpy(vl.plugin, PLUGIN_NAME_SHORT, sizeof(vl.plugin));
692 if (g_chrony_plugin_instance != NULL)
694 sstrncpy(vl.plugin_instance, g_chrony_plugin_instance,
695 sizeof(vl.plugin_instance));
698 sstrncpy(vl.type, p_type, sizeof(vl.type));
700 if (p_type_inst != NULL)
701 sstrncpy(vl.type_instance, p_type_inst, sizeof(vl.type_instance));
703 plugin_dispatch_values(&vl);
708 chrony_push_data_valid(char *p_type, char *p_type_inst, const int p_is_valid,
711 /* Push real value if p_is_valid is true, push NAN if p_is_valid is not true (idea from ntp plugin) */
715 chrony_push_data(p_type, p_type_inst, p_value);
722 /* Initialize the sequence number generator from /dev/urandom */
723 /* Fallbacks: /dev/random and time(NULL) */
726 int fh = open(URAND_DEVICE_PATH, O_RDONLY);
729 ssize_t rc = read(fh, &g_chrony_rand, sizeof(g_chrony_rand));
730 if (rc != sizeof(g_chrony_rand))
732 ERROR(PLUGIN_NAME ": Reading from random source \'%s\'failed: %s (%d)",
733 URAND_DEVICE_PATH, strerror(errno), errno);
735 return CHRONY_RC_FAIL;
738 DEBUG(PLUGIN_NAME ": Seeding RNG from " URAND_DEVICE_PATH);
744 /* URAND_DEVICE_PATH device not found. Try RAND_DEVICE_PATH as fall-back */
745 int fh = open(RAND_DEVICE_PATH, O_RDONLY);
748 ssize_t rc = read(fh, &g_chrony_rand, sizeof(g_chrony_rand));
749 if (rc != sizeof(g_chrony_rand))
752 ": Reading from random source \'%s\'failed: %s (%d)",
753 RAND_DEVICE_PATH, strerror(errno), errno);
755 return CHRONY_RC_FAIL;
758 DEBUG(PLUGIN_NAME ": Seeding RNG from " RAND_DEVICE_PATH);
762 /* Error opening RAND_DEVICE_PATH. Try time(NULL) as fall-back */
763 DEBUG(PLUGIN_NAME ": Seeding RNG from time(NULL)");
764 g_chrony_rand = time(NULL) ^ getpid();
769 ERROR(PLUGIN_NAME ": Opening random source \'%s\' failed: %s (%d)",
770 URAND_DEVICE_PATH, strerror(errno), errno);
771 return CHRONY_RC_FAIL;
779 /*****************************************************************************/
780 /* Exported functions */
781 /*****************************************************************************/
783 chrony_config(const char *p_key, const char *p_value)
788 /* Parse config variables */
789 if (strcasecmp(p_key, CONFIG_KEY_HOST) == 0)
791 if (g_chrony_host != NULL)
794 if ((g_chrony_host = strdup(p_value)) == NULL)
796 ERROR(PLUGIN_NAME ": Error duplicating host name");
797 return CHRONY_RC_FAIL;
802 if (strcasecmp(p_key, CONFIG_KEY_PORT) == 0)
804 if (g_chrony_port != NULL)
807 if ((g_chrony_port = strdup(p_value)) == NULL)
809 ERROR(PLUGIN_NAME ": Error duplicating port name");
810 return CHRONY_RC_FAIL;
815 if (strcasecmp(p_key, CONFIG_KEY_TIMEOUT) == 0)
817 time_t tosec = strtol(p_value, NULL, 0);
818 g_chrony_timeout = tosec;
822 WARNING(PLUGIN_NAME ": Unknown configuration variable: %s %s", p_key, p_value);
823 return CHRONY_RC_FAIL;
827 /* XXX: We could set g_chrony_plugin_instance here to "g_chrony_host-g_chrony_port", but as multiple instances aren't yet supported, we skip this for now */
834 chrony_request_daemon_stats()
836 /* Perform Tracking request */
838 size_t chrony_resp_size;
839 tChrony_Request chrony_req;
840 tChrony_Response chrony_resp;
842 chrony_init_req(&chrony_req);
844 chrony_query(REQ_TRACKING, &chrony_req, &chrony_resp, &chrony_resp_size);
847 ERROR(PLUGIN_NAME ": chrony_query (REQ_TRACKING) failed with status %i",
853 char src_addr[IPV6_STR_MAX_SIZE];
854 memset(src_addr, 0, sizeof(src_addr));
855 niptoha(&chrony_resp.body.tracking.addr, src_addr, sizeof(src_addr));
856 DEBUG(PLUGIN_NAME ": Daemon stat: .addr = %s, .ref_id= %u, .stratum = %u, .leap_status = %u, .ref_time = %u:%u:%u, .current_correction = %f, .last_offset = %f, .rms_offset = %f, .freq_ppm = %f, .skew_ppm = %f, .root_delay = %f, .root_dispersion = %f, .last_update_interval = %f", src_addr, ntohs(chrony_resp.body.tracking.f_ref_id),
857 ntohs(chrony_resp.body.tracking.f_stratum),
858 ntohs(chrony_resp.body.tracking.f_leap_status),
859 ntohl(chrony_resp.body.tracking.f_ref_time.tv_sec_high),
860 ntohl(chrony_resp.body.tracking.f_ref_time.tv_sec_low),
861 ntohl(chrony_resp.body.tracking.f_ref_time.tv_nsec),
862 ntohf(chrony_resp.body.tracking.f_current_correction),
863 ntohf(chrony_resp.body.tracking.f_last_offset),
864 ntohf(chrony_resp.body.tracking.f_rms_offset),
865 ntohf(chrony_resp.body.tracking.f_freq_ppm),
866 ntohf(chrony_resp.body.tracking.f_skew_ppm),
867 ntohf(chrony_resp.body.tracking.f_root_delay),
868 ntohf(chrony_resp.body.tracking.f_root_dispersion),
869 ntohf(chrony_resp.body.tracking.f_last_update_interval));
873 double time_ref = ntohl(chrony_resp.body.tracking.f_ref_time.tv_nsec);
874 time_ref /= 1000000000.0;
875 time_ref += ntohl(chrony_resp.body.tracking.f_ref_time.tv_sec_low);
876 if (chrony_resp.body.tracking.f_ref_time.tv_sec_high)
879 ntohl(chrony_resp.body.tracking.f_ref_time.tv_sec_high);
880 secs_high *= 4294967296.0;
881 time_ref += secs_high;
884 /* Forward results to collectd-daemon */
885 /* Type_instance is always 'chrony' to tag daemon-wide data */
886 /* Type Type_instan Value */
887 chrony_push_data("clock_stratum", DAEMON_NAME, ntohs(chrony_resp.body.tracking.f_stratum));
888 chrony_push_data("time_ref", DAEMON_NAME, time_ref); /* unit: s */
889 chrony_push_data("time_offset_ntp", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_current_correction)); /* Offset between system time and NTP, unit: s */
890 chrony_push_data("time_offset", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_last_offset)); /* Estimated Offset of the NTP time, unit: s */
891 chrony_push_data("time_offset_rms", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_rms_offset)); /* averaged value of the above, unit: s */
892 chrony_push_data("frequency_error", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_freq_ppm)); /* Frequency error of the local osc, unit: ppm */
893 chrony_push_data("clock_skew_ppm", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_skew_ppm));
894 chrony_push_data("root_delay", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_root_delay)); /* Network latency between local daemon and the current source */
895 chrony_push_data("root_dispersion", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_root_dispersion));
896 chrony_push_data("clock_last_update", DAEMON_NAME, ntohf(chrony_resp.body.tracking.f_last_update_interval));
903 chrony_request_sources_count(unsigned int *p_count)
905 /* Requests the number of time sources from the chrony daemon */
907 size_t chrony_resp_size;
908 tChrony_Request chrony_req;
909 tChrony_Response chrony_resp;
911 DEBUG(PLUGIN_NAME ": Requesting data");
912 chrony_init_req(&chrony_req);
914 chrony_query(REQ_N_SOURCES, &chrony_req, &chrony_resp, &chrony_resp_size);
917 ERROR(PLUGIN_NAME ": chrony_query (REQ_N_SOURCES) failed with status %i",
922 *p_count = ntohl(chrony_resp.body.n_sources.f_n_sources);
923 DEBUG(PLUGIN_NAME ": Getting data of %d clock sources", *p_count);
930 chrony_request_source_data(int p_src_idx, int *p_is_reachable)
932 /* Perform Source data request for source #p_src_idx */
934 size_t chrony_resp_size;
935 tChrony_Request chrony_req;
936 tChrony_Response chrony_resp;
938 char src_addr[IPV6_STR_MAX_SIZE];
939 memset(src_addr, 0, sizeof(src_addr));
941 chrony_init_req(&chrony_req);
942 chrony_req.body.source_data.f_index = htonl(p_src_idx);
944 chrony_query(REQ_SOURCE_DATA, &chrony_req, &chrony_resp,
949 ": chrony_query (REQ_SOURCE_DATA) failed with status %i", rc);
953 niptoha(&chrony_resp.body.source_data.addr, src_addr, sizeof(src_addr));
955 ": 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",
956 p_src_idx, src_addr, ntohs(chrony_resp.body.source_data.f_poll),
957 ntohs(chrony_resp.body.source_data.f_stratum),
958 ntohs(chrony_resp.body.source_data.f_state),
959 ntohs(chrony_resp.body.source_data.f_mode),
960 ntohs(chrony_resp.body.source_data.f_flags),
961 ntohs(chrony_resp.body.source_data.f_reachability),
962 ntohl(chrony_resp.body.source_data.f_since_sample),
963 ntohf(chrony_resp.body.source_data.f_origin_latest_meas),
964 ntohf(chrony_resp.body.source_data.f_latest_meas),
965 ntohf(chrony_resp.body.source_data.f_latest_meas_err));
967 /* Push NaN if source is currently not reachable */
969 ntohs(chrony_resp.body.source_data.f_reachability) & 0x01;
970 *p_is_reachable = is_reachable;
972 /* Forward results to collectd-daemon */
973 chrony_push_data_valid("clock_stratum", src_addr, is_reachable,
974 ntohs(chrony_resp.body.source_data.f_stratum));
975 chrony_push_data_valid("clock_state", src_addr, is_reachable,
976 ntohs(chrony_resp.body.source_data.f_state));
977 chrony_push_data_valid("clock_mode", src_addr, is_reachable,
978 ntohs(chrony_resp.body.source_data.f_mode));
979 chrony_push_data_valid("clock_reachability", src_addr, is_reachable,
980 ntohs(chrony_resp.body.source_data.f_reachability));
981 chrony_push_data_valid("clock_last_meas", src_addr, is_reachable,
982 ntohs(chrony_resp.body.source_data.f_since_sample));
989 chrony_request_source_stats(int p_src_idx, const int *p_is_reachable)
991 /* Perform Source stats request for source #p_src_idx */
993 size_t chrony_resp_size;
994 tChrony_Request chrony_req;
995 tChrony_Response chrony_resp;
996 double skew_ppm, frequency_error, time_offset;
998 char src_addr[IPV6_STR_MAX_SIZE];
999 memset(src_addr, 0, sizeof(src_addr));
1001 if (*p_is_reachable == 0)
1004 frequency_error = 0;
1009 chrony_init_req(&chrony_req);
1010 chrony_req.body.source_stats.f_index = htonl(p_src_idx);
1012 chrony_query(REQ_SOURCE_STATS, &chrony_req, &chrony_resp,
1017 ": chrony_query (REQ_SOURCE_STATS) failed with status %i", rc);
1021 skew_ppm = ntohf(chrony_resp.body.source_stats.f_skew_ppm);
1023 ntohf(chrony_resp.body.source_stats.f_rtc_gain_rate_ppm);
1024 time_offset = ntohf(chrony_resp.body.source_stats.f_est_offset);
1026 niptoha(&chrony_resp.body.source_stats.addr, src_addr, sizeof(src_addr));
1028 ": Source[%d] stat: .addr = %s, .ref_id= %u, .n_samples = %u, "
1029 ".n_runs = %u, .span_seconds = %u, .rtc_seconds_fast = %f, "
1030 ".rtc_gain_rate_ppm = %f, .skew_ppm= %f, .est_offset = %f, .est_offset_err = %f",
1031 p_src_idx, src_addr,
1032 ntohl(chrony_resp.body.source_stats.f_ref_id),
1033 ntohl(chrony_resp.body.source_stats.f_n_samples),
1034 ntohl(chrony_resp.body.source_stats.f_n_runs),
1035 ntohl(chrony_resp.body.source_stats.f_span_seconds),
1036 ntohf(chrony_resp.body.source_stats.f_rtc_seconds_fast),
1037 frequency_error, skew_ppm, time_offset,
1038 ntohf(chrony_resp.body.source_stats.f_est_offset_err));
1040 } /* if (*is_reachable) */
1042 /* Forward results to collectd-daemon */
1043 chrony_push_data_valid("clock_skew_ppm", src_addr, *p_is_reachable, skew_ppm);
1044 chrony_push_data_valid("frequency_error", src_addr, *p_is_reachable, frequency_error); /* unit: ppm */
1045 chrony_push_data_valid("time_offset", src_addr, *p_is_reachable, time_offset); /* unit: s */
1047 return CHRONY_RC_OK;
1054 /* collectd read callback: Perform data acquisition */
1056 unsigned int now_src, n_sources;
1058 if (g_chrony_seq_is_initialized == 0)
1060 /* Seed RNG for sequence number generation */
1061 rc = chrony_init_seq();
1062 if (rc != CHRONY_RC_OK)
1065 g_chrony_seq_is_initialized = 1;
1068 /* Get daemon stats */
1069 rc = chrony_request_daemon_stats();
1070 if (rc != CHRONY_RC_OK)
1073 /* Get number of time sources, then check every source for status */
1074 rc = chrony_request_sources_count(&n_sources);
1075 if (rc != CHRONY_RC_OK)
1078 for (now_src = 0; now_src < n_sources; ++now_src)
1081 rc = chrony_request_source_data(now_src, &is_reachable);
1082 if (rc != CHRONY_RC_OK)
1085 rc = chrony_request_source_stats(now_src, &is_reachable);
1086 if (rc != CHRONY_RC_OK)
1090 return CHRONY_RC_OK;
1097 /* Collectd shutdown callback: Free mem */
1098 if (g_chrony_is_connected != 0)
1100 close(g_chrony_socket);
1101 g_chrony_is_connected = 0;
1103 if (g_chrony_host != NULL)
1104 sfree(g_chrony_host);
1106 if (g_chrony_port != NULL)
1107 sfree(g_chrony_port);
1109 if (g_chrony_plugin_instance != NULL)
1110 sfree(g_chrony_plugin_instance);
1112 return CHRONY_RC_OK;
1117 module_register(void)
1119 plugin_register_config(PLUGIN_NAME_SHORT, chrony_config, g_config_keys,
1121 plugin_register_read(PLUGIN_NAME_SHORT, chrony_read);
1122 plugin_register_shutdown(PLUGIN_NAME_SHORT, chrony_shutdown);