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"
34 # include <sys/socket.h>
37 # include <netinet/in.h>
40 # include <arpa/inet.h> /* inet_ntoa */
42 #if HAVE_NETINET_TCP_H
43 # include <netinet/tcp.h>
49 static const char *config_keys[] =
55 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
57 static int do_reverse_lookups = 1;
59 # define NTPD_DEFAULT_HOST "localhost"
60 # define NTPD_DEFAULT_PORT "123"
61 static int sock_descr = -1;
62 static char *ntpd_host = NULL;
63 static char ntpd_port[16];
65 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
66 * The following definitions were copied from the NTPd distribution *
67 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
68 #define MAXFILENAME 128
70 #define MODE_PRIVATE 7
71 #define NTP_OLDVERSION ((u_char) 1) /* oldest credible version */
73 #define FP_FRAC 65536.0
75 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
76 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
78 /* This structure is missing the message authentication code, since collectd
84 uint8_t implementation; /* implementation number */
85 uint8_t request; /* request number */
86 uint16_t err_nitems; /* error code/number of data items */
87 uint16_t mbz_itemsize; /* item size */
88 char data[MAXFILENAME + 48]; /* data area [32 prev](176 byte max) */
89 /* struct conf_peer must fit */
91 #define REQ_LEN_NOMAC (sizeof(struct req_pkt))
94 * A response packet. The length here is variable, this is a
95 * maximally sized one. Note that this implementation doesn't
96 * authenticate responses.
98 #define RESP_HEADER_SIZE (8)
99 #define RESP_DATA_SIZE (500)
103 uint8_t rm_vn_mode; /* response, more, version, mode */
104 uint8_t auth_seq; /* key, sequence number */
105 uint8_t implementation; /* implementation number */
106 uint8_t request; /* request number */
107 uint16_t err_nitems; /* error code/number of data items */
108 uint16_t mbz_itemsize; /* item size */
109 char data[RESP_DATA_SIZE]; /* data area */
113 * Bit setting macros for multifield items.
115 #define RESP_BIT 0x80
116 #define MORE_BIT 0x40
118 #define ISRESPONSE(rm_vn_mode) (((rm_vn_mode)&RESP_BIT)!=0)
119 #define ISMORE(rm_vn_mode) (((rm_vn_mode)&MORE_BIT)!=0)
120 #define INFO_VERSION(rm_vn_mode) ((u_char)(((rm_vn_mode)>>3)&0x7))
121 #define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
123 #define RM_VN_MODE(resp, more, version) \
124 ((u_char)(((resp)?RESP_BIT:0)\
125 |((more)?MORE_BIT:0)\
126 |((version?version:(NTP_OLDVERSION+1))<<3)\
129 #define INFO_IS_AUTH(auth_seq) (((auth_seq) & 0x80) != 0)
130 #define INFO_SEQ(auth_seq) ((auth_seq)&0x7f)
131 #define AUTH_SEQ(auth, seq) ((u_char)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
133 #define INFO_ERR(err_nitems) ((u_short)((ntohs(err_nitems)>>12)&0xf))
134 #define INFO_NITEMS(err_nitems) ((u_short)(ntohs(err_nitems)&0xfff))
135 #define ERR_NITEMS(err, nitems) (htons((u_short)((((u_short)(err)<<12)&0xf000)\
136 |((u_short)(nitems)&0xfff))))
138 #define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
139 #define INFO_ITEMSIZE(mbz_itemsize) ((u_short)(ntohs(mbz_itemsize)&0xfff))
140 #define MBZ_ITEMSIZE(itemsize) (htons((u_short)(itemsize)))
142 /* negate a long float type */
143 #define M_NEG(v_i, v_f) \
146 (v_i) = -((uint32_t)(v_i)); \
148 (v_f) = -((uint32_t)(v_f)); \
153 #define M_LFPTOD(r_i, r_uf, d) \
155 register int32_t i; \
156 register uint32_t f; \
162 (d) = -((double) i + ((double) f) / 4294967296.0); \
164 (d) = (double) i + ((double) f) / 4294967296.0; \
168 #define REQ_PEER_LIST_SUM 1
169 struct info_peer_summary
171 uint32_t dstadr; /* local address (zero for undetermined) */
172 uint32_t srcadr; /* source address */
173 uint16_t srcport; /* source port */
174 uint8_t stratum; /* stratum of peer */
175 int8_t hpoll; /* host polling interval */
176 int8_t ppoll; /* peer polling interval */
177 uint8_t reach; /* reachability register */
178 uint8_t flags; /* flags, from above */
179 uint8_t hmode; /* peer mode */
180 int32_t delay; /* peer.estdelay; s_fp */
181 int32_t offset_int; /* peer.estoffset; integral part */
182 int32_t offset_frc; /* peer.estoffset; fractional part */
183 uint32_t dispersion; /* peer.estdisp; u_fp */
184 uint32_t v6_flag; /* is this v6 or not */
185 uint32_t unused1; /* (unused) padding for dstadr6 */
186 struct in6_addr dstadr6; /* local address (v6) */
187 struct in6_addr srcadr6; /* source address (v6) */
190 #define REQ_SYS_INFO 4
193 uint32_t peer; /* system peer address (v4) */
194 uint8_t peer_mode; /* mode we are syncing to peer in */
195 uint8_t leap; /* system leap bits */
196 uint8_t stratum; /* our stratum */
197 int8_t precision; /* local clock precision */
198 int32_t rootdelay; /* distance from sync source */
199 uint32_t rootdispersion; /* dispersion from sync source */
200 uint32_t refid; /* reference ID of sync source */
201 uint64_t reftime; /* system reference time */
202 uint32_t poll; /* system poll interval */
203 uint8_t flags; /* system flags */
204 uint8_t unused1; /* unused */
205 uint8_t unused2; /* unused */
206 uint8_t unused3; /* unused */
207 int32_t bdelay; /* default broadcast offset */
208 int32_t frequency; /* frequency residual (scaled ppm) */
209 uint64_t authdelay; /* default authentication delay */
210 uint32_t stability; /* clock stability (scaled ppm) */
211 int32_t v6_flag; /* is this v6 or not */
212 int32_t unused4; /* unused, padding for peer6 */
213 struct in6_addr peer6; /* system peer address (v6) */
216 #define REQ_GET_KERNEL 38
238 /* List of reference clock names */
239 static char *refclock_names[] =
241 "UNKNOWN", "LOCAL", "GPS_TRAK", "WWV_PST", /* 0- 3 */
242 "SPECTRACOM", "TRUETIME", "IRIG_AUDIO", "CHU_AUDIO", /* 4- 7 */
243 "GENERIC", "GPS_MX4200", "GPS_AS2201", "GPS_ARBITER", /* 8-11 */
244 "IRIG_TPRO", "ATOM_LEITCH", "MSF_EES", "GPSTM_TRUE", /* 12-15 */
245 "GPS_BANC", "GPS_DATUM", "ACTS_NIST", "WWV_HEATH", /* 16-19 */
246 "GPS_NMEA", "GPS_VME", "PPS", "ACTS_PTB", /* 20-23 */
247 "ACTS_USNO", "TRUETIME", "GPS_HP", "MSF_ARCRON", /* 24-27 */
248 "SHM", "GPS_PALISADE", "GPS_ONCORE", "GPS_JUPITER", /* 28-31 */
249 "CHRONOLOG", "DUMBCLOCK", "ULINK_M320", "PCF", /* 32-35 */
250 "WWV_AUDIO", "GPS_FG", "HOPF_S", "HOPF_P", /* 36-39 */
251 "JJY", "TT_IRIG", "GPS_ZYFER", "GPS_RIPENCC", /* 40-43 */
254 static int refclock_names_num = STATIC_ARRAY_SIZE (refclock_names);
255 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
256 * End of the copied stuff.. *
257 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
259 static int ntpd_config (const char *key, const char *value)
261 if (strcasecmp (key, "Host") == 0)
263 if (ntpd_host != NULL)
265 if ((ntpd_host = strdup (value)) == NULL)
268 else if (strcasecmp (key, "Port") == 0)
270 int port = (int) (atof (value));
271 if ((port > 0) && (port <= 65535))
272 snprintf (ntpd_port, sizeof (ntpd_port),
275 strncpy (ntpd_port, value, sizeof (ntpd_port));
276 ntpd_port[sizeof (ntpd_port) - 1] = '\0';
278 else if (strcasecmp (key, "ReverseLookups") == 0)
280 if ((strcasecmp (value, "True") == 0)
281 || (strcasecmp (value, "Yes") == 0)
282 || (strcasecmp (value, "On") == 0))
283 do_reverse_lookups = 1;
285 do_reverse_lookups = 0;
295 static void ntpd_submit (char *type, char *type_inst, double value)
298 value_list_t vl = VALUE_LIST_INIT;
300 values[0].gauge = value;
304 vl.time = time (NULL);
305 strcpy (vl.host, hostname_g);
306 strcpy (vl.plugin, "ntpd");
307 strcpy (vl.plugin_instance, "");
308 strncpy (vl.type, type, sizeof (vl.type));
309 strncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
311 plugin_dispatch_values (&vl);
314 /* returns `tv0 - tv1' in milliseconds or 0 if `tv1 > tv0' */
315 static int timeval_sub (const struct timeval *tv0, const struct timeval *tv1)
320 if ((tv0->tv_sec < tv1->tv_sec)
321 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
324 sec = tv0->tv_sec - tv1->tv_sec;
325 usec = tv0->tv_usec - tv1->tv_usec;
336 return ((sec * 1000) + ((usec + 500) / 1000));
339 static int ntpd_connect (void)
344 struct addrinfo ai_hints;
345 struct addrinfo *ai_list;
346 struct addrinfo *ai_ptr;
352 DEBUG ("Opening a new socket");
356 host = NTPD_DEFAULT_HOST;
359 if (strlen (port) == 0)
360 port = NTPD_DEFAULT_PORT;
362 memset (&ai_hints, '\0', sizeof (ai_hints));
363 ai_hints.ai_flags = 0;
365 ai_hints.ai_flags |= AI_ADDRCONFIG;
367 ai_hints.ai_family = PF_UNSPEC;
368 ai_hints.ai_socktype = SOCK_DGRAM;
369 ai_hints.ai_protocol = IPPROTO_UDP;
371 if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
374 ERROR ("ntpd plugin: getaddrinfo (%s, %s): %s",
376 (status == EAI_SYSTEM)
377 ? sstrerror (errno, errbuf, sizeof (errbuf))
378 : gai_strerror (status));
382 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
384 /* create our socket descriptor */
385 if ((sock_descr = socket (ai_ptr->ai_family,
387 ai_ptr->ai_protocol)) < 0)
390 /* connect to the ntpd */
391 if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
401 freeaddrinfo (ai_list);
405 ERROR ("ntpd plugin: Unable to connect to server.");
411 /* For a description of the arguments see `ntpd_do_query' below. */
412 static int ntpd_receive_response (int *res_items, int *res_size,
413 char **res_data, int res_item_size)
416 struct pollfd poll_s;
425 struct timeval time_end;
426 struct timeval time_now;
429 int pkt_item_num; /* items in this packet */
430 int pkt_item_len; /* size of the items in this packet */
432 char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
433 int pkt_recvd_num; /* number of packets that have been received */
434 int pkt_lastseq; /* the last sequence number */
435 ssize_t pkt_padding; /* Padding in this packet */
437 if ((sd = ntpd_connect ()) < 0)
443 memset (pkt_recvd, '\0', sizeof (pkt_recvd));
451 if (gettimeofday (&time_end, NULL) < 0)
454 ERROR ("ntpd plugin: gettimeofday failed: %s",
455 sstrerror (errno, errbuf, sizeof (errbuf)));
458 time_end.tv_sec++; /* wait for a most one second */
463 if (gettimeofday (&time_now, NULL) < 0)
466 ERROR ("ntpd plugin: gettimeofday failed: %s",
467 sstrerror (errno, errbuf, sizeof (errbuf)));
471 /* timeout reached */
472 if ((timeout = timeval_sub (&time_end, &time_now)) == 0)
476 poll_s.events = POLLIN | POLLPRI;
479 DEBUG ("Polling for %ims", timeout);
480 status = poll (&poll_s, 1, timeout);
482 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
488 ERROR ("ntpd plugin: poll failed: %s",
489 sstrerror (errno, errbuf, sizeof (errbuf)));
493 if (status == 0) /* timeout */
495 DEBUG ("timeout reached.");
499 memset ((void *) &res, '\0', sizeof (res));
500 status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
502 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
508 INFO ("recv(2) failed: %s",
509 sstrerror (errno, errbuf, sizeof (errbuf)));
510 DEBUG ("Closing socket #%i", sd);
512 sock_descr = sd = -1;
516 DEBUG ("recv'd %i bytes", status);
519 * Do some sanity checks first
521 if (status < RESP_HEADER_SIZE)
523 WARNING ("ntpd plugin: Short (%i bytes) packet received",
527 if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
529 NOTICE ("ntpd plugin: Packet received with mode %i",
530 INFO_MODE (res.rm_vn_mode));
533 if (INFO_IS_AUTH (res.auth_seq))
535 NOTICE ("ntpd plugin: Encrypted packet received");
538 if (!ISRESPONSE (res.rm_vn_mode))
540 NOTICE ("ntpd plugin: Received request packet, "
544 if (INFO_MBZ (res.mbz_itemsize))
546 WARNING ("ntpd plugin: Received packet with nonzero "
550 if (res.implementation != IMPL_XNTPD)
552 WARNING ("ntpd plugin: Asked for request of type %i, "
553 "got %i", (int) IMPL_XNTPD, (int) res.implementation);
557 /* Check for error code */
558 if (INFO_ERR (res.err_nitems) != 0)
560 ERROR ("ntpd plugin: Received error code %i",
561 (int) INFO_ERR(res.err_nitems));
562 return ((int) INFO_ERR (res.err_nitems));
565 /* extract number of items in this packet and the size of these items */
566 pkt_item_num = INFO_NITEMS (res.err_nitems);
567 pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
568 DEBUG ("pkt_item_num = %i; pkt_item_len = %i;",
569 pkt_item_num, pkt_item_len);
571 /* Check if the reported items fit in the packet */
572 if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
574 ERROR ("ntpd plugin: %i items * %i bytes > "
575 "%i bytes - %i bytes header",
576 (int) pkt_item_num, (int) pkt_item_len,
577 (int) status, (int) RESP_HEADER_SIZE);
581 if (pkt_item_len > res_item_size)
583 ERROR ("ntpd plugin: (pkt_item_len = %i) "
584 ">= (res_item_size = %i)",
585 pkt_item_len, res_item_size);
589 /* If this is the first packet (time wise, not sequence wise),
590 * set `res_size'. If it's not the first packet check if the
591 * items have the same size. Discard invalid packets. */
592 if (items_num == 0) /* first packet */
594 DEBUG ("*res_size = %i", pkt_item_len);
595 *res_size = pkt_item_len;
597 else if (*res_size != pkt_item_len)
599 DEBUG ("Error: *res_size = %i; pkt_item_len = %i;",
600 *res_size, pkt_item_len);
601 ERROR ("Item sizes differ.");
606 * Because the items in the packet may be smaller than the
607 * items requested, the following holds true:
609 assert ((*res_size == pkt_item_len)
610 && (pkt_item_len <= res_item_size));
612 /* Calculate the padding. No idea why there might be any padding.. */
614 if (pkt_item_len < res_item_size)
615 pkt_padding = res_item_size - pkt_item_len;
616 DEBUG ("res_item_size = %i; pkt_padding = %i;",
617 res_item_size, pkt_padding);
619 /* Extract the sequence number */
620 pkt_sequence = INFO_SEQ (res.auth_seq);
621 if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
623 ERROR ("ntpd plugin: Received packet with sequence %i",
628 /* Check if this sequence has been received before. If so, discard it. */
629 if (pkt_recvd[pkt_sequence] != '\0')
631 NOTICE ("ntpd plugin: Sequence %i received twice",
636 /* If `pkt_lastseq != -1' another packet without `more bit' has
638 if (!ISMORE (res.rm_vn_mode))
640 if (pkt_lastseq != -1)
642 ERROR ("ntpd plugin: Two packets which both "
643 "claim to be the last one in the "
644 "sequence have been received.");
647 pkt_lastseq = pkt_sequence;
648 DEBUG ("Last sequence = %i;", pkt_lastseq);
652 * Enough with the checks. Copy the data now.
653 * We start by allocating some more memory.
655 DEBUG ("realloc (%p, %i)", (void *) *res_data,
656 (items_num + pkt_item_num) * res_item_size);
657 items = realloc ((void *) *res_data,
658 (items_num + pkt_item_num) * res_item_size);
662 ERROR ("ntpd plugin: realloc failed.");
665 items_num += pkt_item_num;
668 for (i = 0; i < pkt_item_num; i++)
670 /* dst: There are already `*res_items' items with
671 * res_item_size bytes each in in `*res_data'. Set
672 * dst to the first byte after that. */
673 void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
674 /* src: We use `pkt_item_len' to calculate the offset
675 * from the beginning of the packet, because the
676 * items in the packet may be smaller than the
677 * items that were requested. We skip `i' such
679 void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
681 /* Set the padding to zeros */
682 if (pkt_padding != 0)
683 memset (dst, '\0', res_item_size);
684 memcpy (dst, src, (size_t) pkt_item_len);
686 /* Increment `*res_items' by one, so `dst' will end up
687 * one further in the next round. */
689 } /* for (pkt_item_num) */
691 pkt_recvd[pkt_sequence] = (char) 1;
694 if ((pkt_recvd_num - 1) == pkt_lastseq)
696 } /* while (done == 0) */
699 } /* int ntpd_receive_response */
701 /* For a description of the arguments see `ntpd_do_query' below. */
702 static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
709 assert (req_items >= 0);
710 assert (req_size >= 0);
712 if ((sd = ntpd_connect ()) < 0)
715 memset ((void *) &req, '\0', sizeof (req));
716 req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
717 req.auth_seq = AUTH_SEQ (0, 0);
718 req.implementation = IMPL_XNTPD;
719 req.request = (unsigned char) req_code;
721 req_data_len = (size_t) (req_items * req_size);
723 assert (((req_data != NULL) && (req_data_len > 0))
724 || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
726 req.err_nitems = ERR_NITEMS (0, req_items);
727 req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
729 if (req_data != NULL)
730 memcpy ((void *) req.data, (const void *) req_data, req_data_len);
732 DEBUG ("req_items = %i; req_size = %i; req_data = %p;",
733 req_items, req_size, (void *) req_data);
735 status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
738 DEBUG ("`swrite' failed. Closing socket #%i", sd);
740 sock_descr = sd = -1;
750 * req_code: Type of request packet
751 * req_items: Numver of items in the request
752 * req_size: Size of one item in the request
753 * req_data: Data of the request packet
754 * res_items: Pointer to where the number returned items will be stored.
755 * res_size: Pointer to where the size of one returned item will be stored.
756 * res_data: This is where a pointer to the (allocated) data will be stored.
757 * res_item_size: Size of one returned item. (used to calculate padding)
759 * returns: zero upon success, non-zero otherwise.
761 static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
762 int *res_items, int *res_size, char **res_data, int res_item_size)
766 status = ntpd_send_request (req_code, req_items, req_size, req_data);
770 status = ntpd_receive_response (res_items, res_size, res_data,
775 static double ntpd_read_fp (int32_t val_int)
779 val_int = ntohl (val_int);
780 val_double = ((double) val_int) / FP_FRAC;
785 static int ntpd_read (void)
787 struct info_kernel *ik;
791 struct info_peer_summary *ps;
802 status = ntpd_do_query (REQ_GET_KERNEL,
803 0, 0, NULL, /* request data */
804 &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
805 sizeof (struct info_kernel));
809 DEBUG ("ntpd_do_query failed with status %i", status);
812 if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
814 DEBUG ("ntpd_do_query returned: ik = %p; ik_num = %i; ik_size = %i;",
815 (void *) ik, ik_num, ik_size);
819 /* kerninfo -> estimated error */
821 DEBUG ("info_kernel:\n"
822 " pll offset = %.8f\n"
823 " pll frequency = %.8f\n" /* drift compensation */
824 " est error = %.8f\n",
825 ntpd_read_fp (ik->offset),
826 ntpd_read_fp (ik->freq),
827 ntpd_read_fp (ik->esterror));
829 ntpd_submit ("frequency_offset", "loop", ntpd_read_fp (ik->freq));
830 ntpd_submit ("time_offset", "loop", ntpd_read_fp (ik->offset));
831 ntpd_submit ("time_offset", "error", ntpd_read_fp (ik->esterror));
836 status = ntpd_do_query (REQ_PEER_LIST_SUM,
837 0, 0, NULL, /* request data */
838 &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
839 sizeof (struct info_peer_summary));
842 DEBUG ("ntpd_do_query failed with status %i", status);
845 if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
847 DEBUG ("ntpd_do_query returned: ps = %p; ps_num = %i; ps_size = %i;",
848 (void *) ps, ps_num, ps_size);
852 for (i = 0; i < ps_num; i++)
854 struct info_peer_summary *ptr;
857 char peername[NI_MAXHOST];
863 /* Convert the `long floating point' offset value to double */
864 M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
866 /* Special IP addresses for hardware clocks and stuff.. */
868 && ((ntohl (ptr->srcadr) & REFCLOCK_MASK)
871 struct in_addr addr_obj;
874 refclock_id = (ntohl (ptr->srcadr) >> 8) & 0x000000FF;
876 if (refclock_id < refclock_names_num)
878 strncpy (peername, refclock_names[refclock_id],
883 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
884 addr_obj.s_addr = ptr->srcadr;
885 addr_str = inet_ntoa (addr_obj);
887 strncpy (peername, addr_str, sizeof (peername));
890 else /* Normal network host. */
892 struct sockaddr_storage sa;
896 memset (&sa, '\0', sizeof (sa));
900 struct sockaddr_in6 *sa_ptr;
901 sa_ptr = (struct sockaddr_in6 *) &sa;
903 sa_ptr->sin6_family = AF_INET6;
904 sa_ptr->sin6_port = htons (123);
905 memcpy (&sa_ptr->sin6_addr, &ptr->srcadr6,
906 sizeof (struct in6_addr));
907 sa_len = sizeof (struct sockaddr_in6);
911 struct sockaddr_in *sa_ptr;
912 sa_ptr = (struct sockaddr_in *) &sa;
914 sa_ptr->sin_family = AF_INET;
915 sa_ptr->sin_port = htons (123);
916 memcpy (&sa_ptr->sin_addr, &ptr->srcadr,
917 sizeof (struct in_addr));
918 sa_len = sizeof (struct sockaddr_in);
921 if (do_reverse_lookups == 0)
922 flags |= NI_NUMERICHOST;
924 status = getnameinfo ((const struct sockaddr *) &sa,
926 peername, sizeof (peername),
927 NULL, 0, /* No port name */
932 ERROR ("ntpd plugin: getnameinfo failed: %s",
933 (status == EAI_SYSTEM)
934 ? sstrerror (errno, errbuf, sizeof (errbuf))
935 : gai_strerror (status));
947 " dispersion = %f\n",
951 ntpd_read_fp (ptr->delay),
952 ntohl (ptr->offset_int),
953 ntohl (ptr->offset_frc),
955 ntpd_read_fp (ptr->dispersion));
957 if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
958 ntpd_submit ("time_offset", peername, offset);
959 ntpd_submit ("time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
960 if (refclock_id == 0) /* not a reference clock */
961 ntpd_submit ("delay", peername, ntpd_read_fp (ptr->delay));
968 } /* int ntpd_read */
970 void module_register (void)
972 plugin_register_config ("ntpd", ntpd_config,
973 config_keys, config_keys_num);
974 plugin_register_read ("ntpd", ntpd_read);
975 } /* void module_register */