2 * collectd - src/ntpd.c
3 * Copyright (C) 2006-2007 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
25 #include "configfile.h"
26 #include "utils_debug.h"
29 # define NTPD_HAVE_READ 1
31 # define NTPD_HAVE_READ 0
41 # include <sys/socket.h>
44 # include <netinet/in.h>
47 # include <arpa/inet.h> /* inet_ntoa */
49 #if HAVE_NETINET_TCP_H
50 # include <netinet/tcp.h>
56 static data_source_t seconds_dsrc[1] =
58 {"seconds", DS_TYPE_GAUGE, -1000000.0, 1000000.0}
61 static data_set_t time_offset_ds =
63 "time_offset", 1, seconds_dsrc
66 static data_set_t time_dispersion_ds =
68 "time_dispersion", 1, seconds_dsrc
71 static data_set_t delay_ds =
73 "delay", 1, seconds_dsrc
76 static data_source_t ppm_dsrc[1] =
78 {"ppm", DS_TYPE_GAUGE, -1000000.0, 1000000.0}
81 static data_set_t frequency_offset_ds =
83 "frequency_offset", 1, ppm_dsrc
86 static const char *config_keys[] =
92 static int config_keys_num = 2;
95 # define NTPD_DEFAULT_HOST "localhost"
96 # define NTPD_DEFAULT_PORT "123"
97 static int sock_descr = -1;
98 static char *ntpd_host = NULL;
99 static char *ntpd_port = NULL;
101 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
102 * The following definitions were copied from the NTPd distribution *
103 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
104 #define MAXFILENAME 128
106 #define MODE_PRIVATE 7
107 #define NTP_OLDVERSION ((u_char) 1) /* oldest credible version */
109 #define FP_FRAC 65536.0
111 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
112 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
114 /* This structure is missing the message authentication code, since collectd
120 uint8_t implementation; /* implementation number */
121 uint8_t request; /* request number */
122 uint16_t err_nitems; /* error code/number of data items */
123 uint16_t mbz_itemsize; /* item size */
124 char data[MAXFILENAME + 48]; /* data area [32 prev](176 byte max) */
125 /* struct conf_peer must fit */
127 #define REQ_LEN_NOMAC (sizeof(struct req_pkt))
130 * A response packet. The length here is variable, this is a
131 * maximally sized one. Note that this implementation doesn't
132 * authenticate responses.
134 #define RESP_HEADER_SIZE (8)
135 #define RESP_DATA_SIZE (500)
139 uint8_t rm_vn_mode; /* response, more, version, mode */
140 uint8_t auth_seq; /* key, sequence number */
141 uint8_t implementation; /* implementation number */
142 uint8_t request; /* request number */
143 uint16_t err_nitems; /* error code/number of data items */
144 uint16_t mbz_itemsize; /* item size */
145 char data[RESP_DATA_SIZE]; /* data area */
149 * Bit setting macros for multifield items.
151 #define RESP_BIT 0x80
152 #define MORE_BIT 0x40
154 #define ISRESPONSE(rm_vn_mode) (((rm_vn_mode)&RESP_BIT)!=0)
155 #define ISMORE(rm_vn_mode) (((rm_vn_mode)&MORE_BIT)!=0)
156 #define INFO_VERSION(rm_vn_mode) ((u_char)(((rm_vn_mode)>>3)&0x7))
157 #define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
159 #define RM_VN_MODE(resp, more, version) \
160 ((u_char)(((resp)?RESP_BIT:0)\
161 |((more)?MORE_BIT:0)\
162 |((version?version:(NTP_OLDVERSION+1))<<3)\
165 #define INFO_IS_AUTH(auth_seq) (((auth_seq) & 0x80) != 0)
166 #define INFO_SEQ(auth_seq) ((auth_seq)&0x7f)
167 #define AUTH_SEQ(auth, seq) ((u_char)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
169 #define INFO_ERR(err_nitems) ((u_short)((ntohs(err_nitems)>>12)&0xf))
170 #define INFO_NITEMS(err_nitems) ((u_short)(ntohs(err_nitems)&0xfff))
171 #define ERR_NITEMS(err, nitems) (htons((u_short)((((u_short)(err)<<12)&0xf000)\
172 |((u_short)(nitems)&0xfff))))
174 #define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
175 #define INFO_ITEMSIZE(mbz_itemsize) ((u_short)(ntohs(mbz_itemsize)&0xfff))
176 #define MBZ_ITEMSIZE(itemsize) (htons((u_short)(itemsize)))
178 /* negate a long float type */
179 #define M_NEG(v_i, v_f) \
182 (v_i) = -((uint32_t)(v_i)); \
184 (v_f) = -((uint32_t)(v_f)); \
189 #define M_LFPTOD(r_i, r_uf, d) \
191 register int32_t i; \
192 register uint32_t f; \
198 (d) = -((double) i + ((double) f) / 4294967296.0); \
200 (d) = (double) i + ((double) f) / 4294967296.0; \
204 #define REQ_PEER_LIST_SUM 1
205 struct info_peer_summary
207 uint32_t dstadr; /* local address (zero for undetermined) */
208 uint32_t srcadr; /* source address */
209 uint16_t srcport; /* source port */
210 uint8_t stratum; /* stratum of peer */
211 int8_t hpoll; /* host polling interval */
212 int8_t ppoll; /* peer polling interval */
213 uint8_t reach; /* reachability register */
214 uint8_t flags; /* flags, from above */
215 uint8_t hmode; /* peer mode */
216 int32_t delay; /* peer.estdelay; s_fp */
217 int32_t offset_int; /* peer.estoffset; integral part */
218 int32_t offset_frc; /* peer.estoffset; fractional part */
219 uint32_t dispersion; /* peer.estdisp; u_fp */
220 uint32_t v6_flag; /* is this v6 or not */
221 uint32_t unused1; /* (unused) padding for dstadr6 */
222 struct in6_addr dstadr6; /* local address (v6) */
223 struct in6_addr srcadr6; /* source address (v6) */
226 #define REQ_SYS_INFO 4
229 uint32_t peer; /* system peer address (v4) */
230 uint8_t peer_mode; /* mode we are syncing to peer in */
231 uint8_t leap; /* system leap bits */
232 uint8_t stratum; /* our stratum */
233 int8_t precision; /* local clock precision */
234 int32_t rootdelay; /* distance from sync source */
235 uint32_t rootdispersion; /* dispersion from sync source */
236 uint32_t refid; /* reference ID of sync source */
237 uint64_t reftime; /* system reference time */
238 uint32_t poll; /* system poll interval */
239 uint8_t flags; /* system flags */
240 uint8_t unused1; /* unused */
241 uint8_t unused2; /* unused */
242 uint8_t unused3; /* unused */
243 int32_t bdelay; /* default broadcast offset */
244 int32_t frequency; /* frequency residual (scaled ppm) */
245 uint64_t authdelay; /* default authentication delay */
246 uint32_t stability; /* clock stability (scaled ppm) */
247 int32_t v6_flag; /* is this v6 or not */
248 int32_t unused4; /* unused, padding for peer6 */
249 struct in6_addr peer6; /* system peer address (v6) */
252 #define REQ_GET_KERNEL 38
274 /* List of reference clock names */
275 static char *refclock_names[] =
277 "UNKNOWN", "LOCAL", "GPS_TRAK", "WWV_PST", /* 0- 3 */
278 "SPECTRACOM", "TRUETIME", "IRIG_AUDIO", "CHU_AUDIO", /* 4- 7 */
279 "GENERIC", "GPS_MX4200", "GPS_AS2201", "GPS_ARBITER", /* 8-11 */
280 "IRIG_TPRO", "ATOM_LEITCH", "MSF_EES", "GPSTM_TRUE", /* 12-15 */
281 "GPS_BANC", "GPS_DATUM", "ACTS_NIST", "WWV_HEATH", /* 16-19 */
282 "GPS_NMEA", "GPS_VME", "PPS", "ACTS_PTB", /* 20-23 */
283 "ACTS_USNO", "TRUETIME", "GPS_HP", "MSF_ARCRON", /* 24-27 */
284 "SHM", "GPS_PALISADE", "GPS_ONCORE", "GPS_JUPITER", /* 28-31 */
285 "CHRONOLOG", "DUMBCLOCK", "ULINK_M320", "PCF", /* 32-35 */
286 "WWV_AUDIO", "GPS_FG", "HOPF_S", "HOPF_P", /* 36-39 */
287 "JJY", "TT_IRIG", "GPS_ZYFER", "GPS_RIPENCC", /* 40-43 */
288 "NEOCLK4X", NULL /* 44 */
290 static int refclock_names_num = 45;
291 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
292 * End of the copied stuff.. *
293 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
295 static int ntpd_config (const char *key, const char *value)
297 if (strcasecmp (key, "host") == 0)
299 if (ntpd_host != NULL)
301 if ((ntpd_host = strdup (value)) == NULL)
304 else if (strcasecmp (key, "port") == 0)
306 if (ntpd_port != NULL)
308 if ((ntpd_port = strdup (value)) == NULL)
319 static void ntpd_submit (char *type, char *type_inst, double value)
322 value_list_t vl = VALUE_LIST_INIT;
324 values[0].gauge = value;
328 vl.time = time (NULL);
329 strcpy (vl.host, hostname_g);
330 strcpy (vl.plugin, "ntpd");
331 strcpy (vl.plugin_instance, "");
332 strncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
334 plugin_dispatch_values (type, &vl);
337 /* returns `tv0 - tv1' in milliseconds or 0 if `tv1 > tv0' */
338 static int timeval_sub (const struct timeval *tv0, const struct timeval *tv1)
343 if ((tv0->tv_sec < tv1->tv_sec)
344 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
347 sec = tv0->tv_sec - tv1->tv_sec;
348 usec = tv0->tv_usec - tv1->tv_usec;
359 return ((sec * 1000) + ((usec + 500) / 1000));
362 static int ntpd_connect (void)
367 struct addrinfo ai_hints;
368 struct addrinfo *ai_list;
369 struct addrinfo *ai_ptr;
375 DBG ("Opening a new socket");
379 host = NTPD_DEFAULT_HOST;
383 port = NTPD_DEFAULT_PORT;
385 memset (&ai_hints, '\0', sizeof (ai_hints));
386 ai_hints.ai_flags = AI_ADDRCONFIG;
387 ai_hints.ai_family = PF_UNSPEC;
388 ai_hints.ai_socktype = SOCK_DGRAM;
389 ai_hints.ai_protocol = IPPROTO_UDP;
391 if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
393 DBG ("getaddrinfo (%s, %s): %s",
395 status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
396 syslog (LOG_ERR, "ntpd plugin: getaddrinfo (%s, %s): %s",
398 status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
402 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
404 /* create our socket descriptor */
405 if ((sock_descr = socket (ai_ptr->ai_family,
407 ai_ptr->ai_protocol)) < 0)
410 /* connect to the ntpd */
411 if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
421 freeaddrinfo (ai_list);
425 DBG ("Unable to connect to server.");
426 syslog (LOG_ERR, "ntpd plugin: Unable to connect to server.");
432 /* For a description of the arguments see `ntpd_do_query' below. */
433 static int ntpd_receive_response (int req_code, int *res_items, int *res_size,
434 char **res_data, int res_item_size)
437 struct pollfd poll_s;
446 struct timeval time_end;
447 struct timeval time_now;
450 int pkt_item_num; /* items in this packet */
451 int pkt_item_len; /* size of the items in this packet */
453 char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
454 int pkt_recvd_num; /* number of packets that have been received */
455 int pkt_lastseq; /* the last sequence number */
456 ssize_t pkt_padding; /* Padding in this packet */
458 if ((sd = ntpd_connect ()) < 0)
464 memset (pkt_recvd, '\0', sizeof (pkt_recvd));
472 if (gettimeofday (&time_end, NULL) < 0)
474 syslog (LOG_ERR, "ntpd plugin: gettimeofday failed: %s",
478 time_end.tv_sec++; /* wait for a most one second */
483 if (gettimeofday (&time_now, NULL) < 0)
485 syslog (LOG_ERR, "ntpd plugin: gettimeofday failed: %s",
490 /* timeout reached */
491 if ((timeout = timeval_sub (&time_end, &time_now)) == 0)
495 poll_s.events = POLLIN | POLLPRI;
498 DBG ("Polling for %ims", timeout);
499 status = poll (&poll_s, 1, timeout);
501 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
506 DBG ("poll failed: %s", strerror (errno));
507 syslog (LOG_ERR, "ntpd plugin: poll failed: %s",
512 if (status == 0) /* timeout */
514 DBG ("timeout reached.");
518 memset ((void *) &res, '\0', sizeof (res));
519 status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
521 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
526 DBG ("recv(2) failed: %s", strerror (errno));
527 DBG ("Closing socket #%i", sd);
529 sock_descr = sd = -1;
533 DBG ("recv'd %i bytes", status);
536 * Do some sanity checks first
538 if (status < RESP_HEADER_SIZE)
540 syslog (LOG_WARNING, "ntpd plugin: Short (%i bytes) packet received",
544 if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
546 syslog (LOG_NOTICE, "ntpd plugin: Packet received with mode %i",
547 INFO_MODE (res.rm_vn_mode));
550 if (INFO_IS_AUTH (res.auth_seq))
552 syslog (LOG_NOTICE, "ntpd plugin: Encrypted packet received");
555 if (!ISRESPONSE (res.rm_vn_mode))
557 syslog (LOG_NOTICE, "ntpd plugin: Received request packet, "
561 if (INFO_MBZ (res.mbz_itemsize))
563 syslog (LOG_WARNING, "ntpd plugin: Received packet with nonzero "
567 if (res.implementation != IMPL_XNTPD)
569 syslog (LOG_WARNING, "ntpd plugin: Asked for request of type %i, "
570 "got %i", (int) IMPL_XNTPD, (int) res.implementation);
574 /* Check for error code */
575 if (INFO_ERR (res.err_nitems) != 0)
577 syslog (LOG_ERR, "ntpd plugin: Received error code %i",
578 (int) INFO_ERR(res.err_nitems));
579 return ((int) INFO_ERR (res.err_nitems));
582 /* extract number of items in this packet and the size of these items */
583 pkt_item_num = INFO_NITEMS (res.err_nitems);
584 pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
585 DBG ("pkt_item_num = %i; pkt_item_len = %i;",
586 pkt_item_num, pkt_item_len);
588 /* Check if the reported items fit in the packet */
589 if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
591 syslog (LOG_ERR, "ntpd plugin: %i items * %i bytes > "
592 "%i bytes - %i bytes header",
593 (int) pkt_item_num, (int) pkt_item_len,
594 (int) status, (int) RESP_HEADER_SIZE);
598 /* If this is the first packet (time wise, not sequence wise),
599 * set `res_size'. If it's not the first packet check if the
600 * items have the same size. Discard invalid packets. */
601 if (items_num == 0) /* first packet */
603 DBG ("*res_size = %i", pkt_item_len);
604 *res_size = pkt_item_len;
606 else if (*res_size != pkt_item_len)
608 DBG ("Error: *res_size = %i; pkt_item_len = %i;",
609 *res_size, pkt_item_len);
610 syslog (LOG_ERR, "Item sizes differ.");
614 /* Calculate the padding. No idea why there might be any padding.. */
616 if (res_item_size > pkt_item_len)
617 pkt_padding = res_item_size - pkt_item_len;
618 DBG ("res_item_size = %i; pkt_padding = %i;",
619 res_item_size, pkt_padding);
621 /* Extract the sequence number */
622 pkt_sequence = INFO_SEQ (res.auth_seq);
623 if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
625 syslog (LOG_ERR, "ntpd plugin: Received packet with sequence %i",
630 /* Check if this sequence has been received before. If so, discard it. */
631 if (pkt_recvd[pkt_sequence] != '\0')
633 syslog (LOG_NOTICE, "ntpd plugin: Sequence %i received twice",
638 /* If `pkt_lastseq != -1' another packet without `more bit' has
640 if (!ISMORE (res.rm_vn_mode))
642 if (pkt_lastseq != -1)
644 syslog (LOG_ERR, "ntpd plugin: Two packets which both "
645 "claim to be the last one in the "
646 "sequence have been received.");
649 pkt_lastseq = pkt_sequence;
650 DBG ("Last sequence = %i;", pkt_lastseq);
654 * Enough with the checks. Copy the data now.
655 * We start by allocating some more memory.
657 DBG ("realloc (%p, %i)", (void *) *res_data,
658 (items_num + pkt_item_num) * res_item_size);
659 items = realloc ((void *) *res_data,
660 (items_num + pkt_item_num) * res_item_size);
661 items_num += pkt_item_num;
665 syslog (LOG_ERR, "ntpd plugin: realloc failed.");
670 for (i = 0; i < pkt_item_num; i++)
672 void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
673 void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
675 /* Set the padding to zeros */
676 if (pkt_padding != 0)
677 memset (dst, '\0', res_item_size);
678 memcpy (dst, src, (size_t) pkt_item_len);
683 pkt_recvd[pkt_sequence] = (char) 1;
686 if ((pkt_recvd_num - 1) == pkt_lastseq)
688 } /* while (done == 0) */
693 /* For a description of the arguments see `ntpd_do_query' below. */
694 static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
701 assert (req_items >= 0);
702 assert (req_size >= 0);
704 if ((sd = ntpd_connect ()) < 0)
707 memset ((void *) &req, '\0', sizeof (req));
708 req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
709 req.auth_seq = AUTH_SEQ (0, 0);
710 req.implementation = IMPL_XNTPD;
711 req.request = (unsigned char) req_code;
713 req_data_len = (size_t) (req_items * req_size);
715 assert (((req_data != NULL) && (req_data_len > 0))
716 || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
718 req.err_nitems = ERR_NITEMS (0, req_items);
719 req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
721 if (req_data != NULL)
722 memcpy ((void *) req.data, (const void *) req_data, req_data_len);
724 DBG ("req_items = %i; req_size = %i; req_data = %p;",
725 req_items, req_size, (void *) req_data);
727 status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
730 DBG ("`swrite' failed. Closing socket #%i", sd);
732 sock_descr = sd = -1;
742 * req_code: Type of request packet
743 * req_items: Numver of items in the request
744 * req_size: Size of one item in the request
745 * req_data: Data of the request packet
746 * res_items: Pointer to where the number returned items will be stored.
747 * res_size: Pointer to where the size of one returned item will be stored.
748 * res_data: This is where a pointer to the (allocated) data will be stored.
749 * res_item_size: Size of one returned item. (used to calculate padding)
751 * returns: zero upon success, non-zero otherwise.
753 static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
754 int *res_items, int *res_size, char **res_data, int res_item_size)
758 status = ntpd_send_request (req_code, req_items, req_size, req_data);
762 status = ntpd_receive_response (req_code, res_items, res_size, res_data,
767 static double ntpd_read_fp (int32_t val_int)
771 val_int = ntohl (val_int);
772 val_double = ((double) val_int) / FP_FRAC;
777 static int ntpd_read (void)
779 struct info_kernel *ik;
783 struct info_peer_summary *ps;
794 status = ntpd_do_query (REQ_GET_KERNEL,
795 0, 0, NULL, /* request data */
796 &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
797 sizeof (struct info_kernel));
801 DBG ("ntpd_do_query failed with status %i", status);
804 if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
806 DBG ("ntpd_do_query returned: ik = %p; ik_num = %i; ik_size = %i;",
807 (void *) ik, ik_num, ik_size);
811 /* kerninfo -> estimated error */
813 DBG ("info_kernel:\n"
814 " pll offset = %.8f\n"
815 " pll frequency = %.8f\n" /* drift compensation */
816 " est error = %.8f\n",
817 ntpd_read_fp (ik->offset),
818 ntpd_read_fp (ik->freq),
819 ntpd_read_fp (ik->esterror));
821 ntpd_submit ("frequency_offset", "loop", ntpd_read_fp (ik->freq));
822 ntpd_submit ("time_offset", "loop", ntpd_read_fp (ik->offset));
823 ntpd_submit ("time_offset", "error", ntpd_read_fp (ik->esterror));
828 status = ntpd_do_query (REQ_PEER_LIST_SUM,
829 0, 0, NULL, /* request data */
830 &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
831 sizeof (struct info_peer_summary));
834 DBG ("ntpd_do_query failed with status %i", status);
837 if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
839 DBG ("ntpd_do_query returned: ps = %p; ps_num = %i; ps_size = %i;",
840 (void *) ps, ps_num, ps_size);
844 for (i = 0; i < ps_num; i++)
846 struct info_peer_summary *ptr;
849 char peername[NI_MAXHOST];
856 if (((ntohl (ptr->dstadr) & 0xFFFFFF00) == 0x7F000000) || (ptr->dstadr == 0))
860 /* Convert the `long floating point' offset value to double */
861 M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
865 struct sockaddr_in6 sa;
867 memset (&sa, 0, sizeof (sa));
868 sa.sin6_family = AF_INET6;
869 sa.sin6_port = htons (123);
870 memcpy (&sa.sin6_addr, &ptr->srcadr6, sizeof (struct in6_addr));
872 status = getnameinfo ((const struct sockaddr *) &sa,
874 peername, sizeof (peername),
875 NULL, 0, 0 /* no flags */);
878 syslog (LOG_ERR, "ntpd plugin: getnameinfo failed: %s",
881 : gai_strerror (status));
885 else if ((ntohl (ptr->srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR)
887 struct in_addr addr_obj;
890 refclock_id = (ntohl (ptr->srcadr) >> 8) & 0x000000FF;
892 if (refclock_id < refclock_names_num)
894 strncpy (peername, refclock_names[refclock_id],
899 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
900 addr_obj.s_addr = ptr->srcadr;
901 addr_str = inet_ntoa (addr_obj);
903 strncpy (peername, addr_str, sizeof (peername));
908 struct in_addr addr_obj;
909 struct hostent *addr_he;
912 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
913 addr_obj.s_addr = ptr->srcadr;
914 addr_str = inet_ntoa (addr_obj);
916 addr_he = gethostbyaddr ((const void *) &addr_obj,
917 sizeof (addr_obj), AF_INET);
920 strncpy (peername, addr_he->h_name, sizeof (peername));
924 strncpy (peername, addr_str, sizeof (peername));
935 " dispersion = %f\n",
939 ntpd_read_fp (ptr->delay),
940 ntohl (ptr->offset_int),
941 ntohl (ptr->offset_frc),
943 ntpd_read_fp (ptr->dispersion));
945 if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
946 ntpd_submit ("time_offset", peername, offset);
947 ntpd_submit ("time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
948 if (refclock_id == 0) /* not a reference clock */
949 ntpd_submit ("delay", peername, ntpd_read_fp (ptr->delay));
956 } /* int ntpd_read */
957 #endif /* NTPD_HAVE_READ */
959 void module_register (void)
961 plugin_register_data_set (&time_offset_ds);
962 plugin_register_data_set (&time_dispersion_ds);
963 plugin_register_data_set (&delay_ds);
964 plugin_register_data_set (&frequency_offset_ds);
967 plugin_register_config ("ntpd", ntpd_config, config_keys, config_keys_num);
968 plugin_register_read ("ntpd", ntpd_read);
969 #endif /* NTPD_HAVE_READ */