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"
28 # define NTPD_HAVE_READ 1
30 # define NTPD_HAVE_READ 0
40 # include <sys/socket.h>
43 # include <netinet/in.h>
46 # include <arpa/inet.h> /* inet_ntoa */
48 #if HAVE_NETINET_TCP_H
49 # include <netinet/tcp.h>
55 static const char *config_keys[] =
61 static int config_keys_num = 2;
64 # define NTPD_DEFAULT_HOST "localhost"
65 # define NTPD_DEFAULT_PORT "123"
66 static int sock_descr = -1;
67 static char *ntpd_host = NULL;
68 static char *ntpd_port = NULL;
70 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
71 * The following definitions were copied from the NTPd distribution *
72 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
73 #define MAXFILENAME 128
75 #define MODE_PRIVATE 7
76 #define NTP_OLDVERSION ((u_char) 1) /* oldest credible version */
78 #define FP_FRAC 65536.0
80 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
81 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
83 /* This structure is missing the message authentication code, since collectd
89 uint8_t implementation; /* implementation number */
90 uint8_t request; /* request number */
91 uint16_t err_nitems; /* error code/number of data items */
92 uint16_t mbz_itemsize; /* item size */
93 char data[MAXFILENAME + 48]; /* data area [32 prev](176 byte max) */
94 /* struct conf_peer must fit */
96 #define REQ_LEN_NOMAC (sizeof(struct req_pkt))
99 * A response packet. The length here is variable, this is a
100 * maximally sized one. Note that this implementation doesn't
101 * authenticate responses.
103 #define RESP_HEADER_SIZE (8)
104 #define RESP_DATA_SIZE (500)
108 uint8_t rm_vn_mode; /* response, more, version, mode */
109 uint8_t auth_seq; /* key, sequence number */
110 uint8_t implementation; /* implementation number */
111 uint8_t request; /* request number */
112 uint16_t err_nitems; /* error code/number of data items */
113 uint16_t mbz_itemsize; /* item size */
114 char data[RESP_DATA_SIZE]; /* data area */
118 * Bit setting macros for multifield items.
120 #define RESP_BIT 0x80
121 #define MORE_BIT 0x40
123 #define ISRESPONSE(rm_vn_mode) (((rm_vn_mode)&RESP_BIT)!=0)
124 #define ISMORE(rm_vn_mode) (((rm_vn_mode)&MORE_BIT)!=0)
125 #define INFO_VERSION(rm_vn_mode) ((u_char)(((rm_vn_mode)>>3)&0x7))
126 #define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
128 #define RM_VN_MODE(resp, more, version) \
129 ((u_char)(((resp)?RESP_BIT:0)\
130 |((more)?MORE_BIT:0)\
131 |((version?version:(NTP_OLDVERSION+1))<<3)\
134 #define INFO_IS_AUTH(auth_seq) (((auth_seq) & 0x80) != 0)
135 #define INFO_SEQ(auth_seq) ((auth_seq)&0x7f)
136 #define AUTH_SEQ(auth, seq) ((u_char)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
138 #define INFO_ERR(err_nitems) ((u_short)((ntohs(err_nitems)>>12)&0xf))
139 #define INFO_NITEMS(err_nitems) ((u_short)(ntohs(err_nitems)&0xfff))
140 #define ERR_NITEMS(err, nitems) (htons((u_short)((((u_short)(err)<<12)&0xf000)\
141 |((u_short)(nitems)&0xfff))))
143 #define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
144 #define INFO_ITEMSIZE(mbz_itemsize) ((u_short)(ntohs(mbz_itemsize)&0xfff))
145 #define MBZ_ITEMSIZE(itemsize) (htons((u_short)(itemsize)))
147 /* negate a long float type */
148 #define M_NEG(v_i, v_f) \
151 (v_i) = -((uint32_t)(v_i)); \
153 (v_f) = -((uint32_t)(v_f)); \
158 #define M_LFPTOD(r_i, r_uf, d) \
160 register int32_t i; \
161 register uint32_t f; \
167 (d) = -((double) i + ((double) f) / 4294967296.0); \
169 (d) = (double) i + ((double) f) / 4294967296.0; \
173 #define REQ_PEER_LIST_SUM 1
174 struct info_peer_summary
176 uint32_t dstadr; /* local address (zero for undetermined) */
177 uint32_t srcadr; /* source address */
178 uint16_t srcport; /* source port */
179 uint8_t stratum; /* stratum of peer */
180 int8_t hpoll; /* host polling interval */
181 int8_t ppoll; /* peer polling interval */
182 uint8_t reach; /* reachability register */
183 uint8_t flags; /* flags, from above */
184 uint8_t hmode; /* peer mode */
185 int32_t delay; /* peer.estdelay; s_fp */
186 int32_t offset_int; /* peer.estoffset; integral part */
187 int32_t offset_frc; /* peer.estoffset; fractional part */
188 uint32_t dispersion; /* peer.estdisp; u_fp */
189 uint32_t v6_flag; /* is this v6 or not */
190 uint32_t unused1; /* (unused) padding for dstadr6 */
191 struct in6_addr dstadr6; /* local address (v6) */
192 struct in6_addr srcadr6; /* source address (v6) */
195 #define REQ_SYS_INFO 4
198 uint32_t peer; /* system peer address (v4) */
199 uint8_t peer_mode; /* mode we are syncing to peer in */
200 uint8_t leap; /* system leap bits */
201 uint8_t stratum; /* our stratum */
202 int8_t precision; /* local clock precision */
203 int32_t rootdelay; /* distance from sync source */
204 uint32_t rootdispersion; /* dispersion from sync source */
205 uint32_t refid; /* reference ID of sync source */
206 uint64_t reftime; /* system reference time */
207 uint32_t poll; /* system poll interval */
208 uint8_t flags; /* system flags */
209 uint8_t unused1; /* unused */
210 uint8_t unused2; /* unused */
211 uint8_t unused3; /* unused */
212 int32_t bdelay; /* default broadcast offset */
213 int32_t frequency; /* frequency residual (scaled ppm) */
214 uint64_t authdelay; /* default authentication delay */
215 uint32_t stability; /* clock stability (scaled ppm) */
216 int32_t v6_flag; /* is this v6 or not */
217 int32_t unused4; /* unused, padding for peer6 */
218 struct in6_addr peer6; /* system peer address (v6) */
221 #define REQ_GET_KERNEL 38
243 /* List of reference clock names */
244 static char *refclock_names[] =
246 "UNKNOWN", "LOCAL", "GPS_TRAK", "WWV_PST", /* 0- 3 */
247 "SPECTRACOM", "TRUETIME", "IRIG_AUDIO", "CHU_AUDIO", /* 4- 7 */
248 "GENERIC", "GPS_MX4200", "GPS_AS2201", "GPS_ARBITER", /* 8-11 */
249 "IRIG_TPRO", "ATOM_LEITCH", "MSF_EES", "GPSTM_TRUE", /* 12-15 */
250 "GPS_BANC", "GPS_DATUM", "ACTS_NIST", "WWV_HEATH", /* 16-19 */
251 "GPS_NMEA", "GPS_VME", "PPS", "ACTS_PTB", /* 20-23 */
252 "ACTS_USNO", "TRUETIME", "GPS_HP", "MSF_ARCRON", /* 24-27 */
253 "SHM", "GPS_PALISADE", "GPS_ONCORE", "GPS_JUPITER", /* 28-31 */
254 "CHRONOLOG", "DUMBCLOCK", "ULINK_M320", "PCF", /* 32-35 */
255 "WWV_AUDIO", "GPS_FG", "HOPF_S", "HOPF_P", /* 36-39 */
256 "JJY", "TT_IRIG", "GPS_ZYFER", "GPS_RIPENCC", /* 40-43 */
257 "NEOCLK4X", NULL /* 44 */
259 static int refclock_names_num = 45;
260 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
261 * End of the copied stuff.. *
262 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
264 static int ntpd_config (const char *key, const char *value)
266 if (strcasecmp (key, "host") == 0)
268 if (ntpd_host != NULL)
270 if ((ntpd_host = strdup (value)) == NULL)
273 else if (strcasecmp (key, "port") == 0)
275 if (ntpd_port != NULL)
277 if ((ntpd_port = strdup (value)) == NULL)
288 static void ntpd_submit (char *type, char *type_inst, double value)
291 value_list_t vl = VALUE_LIST_INIT;
293 values[0].gauge = value;
297 vl.time = time (NULL);
298 strcpy (vl.host, hostname_g);
299 strcpy (vl.plugin, "ntpd");
300 strcpy (vl.plugin_instance, "");
301 strncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
303 plugin_dispatch_values (type, &vl);
306 /* returns `tv0 - tv1' in milliseconds or 0 if `tv1 > tv0' */
307 static int timeval_sub (const struct timeval *tv0, const struct timeval *tv1)
312 if ((tv0->tv_sec < tv1->tv_sec)
313 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
316 sec = tv0->tv_sec - tv1->tv_sec;
317 usec = tv0->tv_usec - tv1->tv_usec;
328 return ((sec * 1000) + ((usec + 500) / 1000));
331 static int ntpd_connect (void)
336 struct addrinfo ai_hints;
337 struct addrinfo *ai_list;
338 struct addrinfo *ai_ptr;
344 DEBUG ("Opening a new socket");
348 host = NTPD_DEFAULT_HOST;
352 port = NTPD_DEFAULT_PORT;
354 memset (&ai_hints, '\0', sizeof (ai_hints));
355 ai_hints.ai_flags = AI_ADDRCONFIG;
356 ai_hints.ai_family = PF_UNSPEC;
357 ai_hints.ai_socktype = SOCK_DGRAM;
358 ai_hints.ai_protocol = IPPROTO_UDP;
360 if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
363 ERROR ("ntpd plugin: getaddrinfo (%s, %s): %s",
365 (status == EAI_SYSTEM)
366 ? sstrerror (errno, errbuf, sizeof (errbuf))
367 : gai_strerror (status));
371 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
373 /* create our socket descriptor */
374 if ((sock_descr = socket (ai_ptr->ai_family,
376 ai_ptr->ai_protocol)) < 0)
379 /* connect to the ntpd */
380 if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
390 freeaddrinfo (ai_list);
394 DEBUG ("Unable to connect to server.");
395 ERROR ("ntpd plugin: Unable to connect to server.");
401 /* For a description of the arguments see `ntpd_do_query' below. */
402 static int ntpd_receive_response (int req_code, int *res_items, int *res_size,
403 char **res_data, int res_item_size)
406 struct pollfd poll_s;
415 struct timeval time_end;
416 struct timeval time_now;
419 int pkt_item_num; /* items in this packet */
420 int pkt_item_len; /* size of the items in this packet */
422 char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
423 int pkt_recvd_num; /* number of packets that have been received */
424 int pkt_lastseq; /* the last sequence number */
425 ssize_t pkt_padding; /* Padding in this packet */
427 if ((sd = ntpd_connect ()) < 0)
433 memset (pkt_recvd, '\0', sizeof (pkt_recvd));
441 if (gettimeofday (&time_end, NULL) < 0)
444 ERROR ("ntpd plugin: gettimeofday failed: %s",
445 sstrerror (errno, errbuf, sizeof (errbuf)));
448 time_end.tv_sec++; /* wait for a most one second */
453 if (gettimeofday (&time_now, NULL) < 0)
456 ERROR ("ntpd plugin: gettimeofday failed: %s",
457 sstrerror (errno, errbuf, sizeof (errbuf)));
461 /* timeout reached */
462 if ((timeout = timeval_sub (&time_end, &time_now)) == 0)
466 poll_s.events = POLLIN | POLLPRI;
469 DEBUG ("Polling for %ims", timeout);
470 status = poll (&poll_s, 1, timeout);
472 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
478 ERROR ("ntpd plugin: poll failed: %s",
479 sstrerror (errno, errbuf, sizeof (errbuf)));
483 if (status == 0) /* timeout */
485 DEBUG ("timeout reached.");
489 memset ((void *) &res, '\0', sizeof (res));
490 status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
492 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
498 DEBUG ("recv(2) failed: %s",
499 sstrerror (errno, errbuf, sizeof (errbuf)));
500 DEBUG ("Closing socket #%i", sd);
502 sock_descr = sd = -1;
506 DEBUG ("recv'd %i bytes", status);
509 * Do some sanity checks first
511 if (status < RESP_HEADER_SIZE)
513 WARNING ("ntpd plugin: Short (%i bytes) packet received",
517 if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
519 NOTICE ("ntpd plugin: Packet received with mode %i",
520 INFO_MODE (res.rm_vn_mode));
523 if (INFO_IS_AUTH (res.auth_seq))
525 NOTICE ("ntpd plugin: Encrypted packet received");
528 if (!ISRESPONSE (res.rm_vn_mode))
530 NOTICE ("ntpd plugin: Received request packet, "
534 if (INFO_MBZ (res.mbz_itemsize))
536 WARNING ("ntpd plugin: Received packet with nonzero "
540 if (res.implementation != IMPL_XNTPD)
542 WARNING ("ntpd plugin: Asked for request of type %i, "
543 "got %i", (int) IMPL_XNTPD, (int) res.implementation);
547 /* Check for error code */
548 if (INFO_ERR (res.err_nitems) != 0)
550 ERROR ("ntpd plugin: Received error code %i",
551 (int) INFO_ERR(res.err_nitems));
552 return ((int) INFO_ERR (res.err_nitems));
555 /* extract number of items in this packet and the size of these items */
556 pkt_item_num = INFO_NITEMS (res.err_nitems);
557 pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
558 DEBUG ("pkt_item_num = %i; pkt_item_len = %i;",
559 pkt_item_num, pkt_item_len);
561 /* Check if the reported items fit in the packet */
562 if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
564 ERROR ("ntpd plugin: %i items * %i bytes > "
565 "%i bytes - %i bytes header",
566 (int) pkt_item_num, (int) pkt_item_len,
567 (int) status, (int) RESP_HEADER_SIZE);
571 if (pkt_item_len > res_item_size)
573 syslog (LOG_ERR, "ntpd plugin: (pkt_item_len = %i) "
574 ">= (res_item_size = %i)",
575 pkt_item_len, res_item_size);
579 /* If this is the first packet (time wise, not sequence wise),
580 * set `res_size'. If it's not the first packet check if the
581 * items have the same size. Discard invalid packets. */
582 if (items_num == 0) /* first packet */
584 DEBUG ("*res_size = %i", pkt_item_len);
585 *res_size = pkt_item_len;
587 else if (*res_size != pkt_item_len)
589 DEBUG ("Error: *res_size = %i; pkt_item_len = %i;",
590 *res_size, pkt_item_len);
591 ERROR ("Item sizes differ.");
596 * Because the items in the packet may be smaller than the
597 * items requested, the following holds true:
599 assert ((*res_size == pkt_item_len)
600 && (pkt_item_len <= res_item_size));
602 /* Calculate the padding. No idea why there might be any padding.. */
604 if (pkt_item_len < res_item_size)
605 pkt_padding = res_item_size - pkt_item_len;
606 DEBUG ("res_item_size = %i; pkt_padding = %i;",
607 res_item_size, pkt_padding);
609 /* Extract the sequence number */
610 pkt_sequence = INFO_SEQ (res.auth_seq);
611 if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
613 ERROR ("ntpd plugin: Received packet with sequence %i",
618 /* Check if this sequence has been received before. If so, discard it. */
619 if (pkt_recvd[pkt_sequence] != '\0')
621 NOTICE ("ntpd plugin: Sequence %i received twice",
626 /* If `pkt_lastseq != -1' another packet without `more bit' has
628 if (!ISMORE (res.rm_vn_mode))
630 if (pkt_lastseq != -1)
632 ERROR ("ntpd plugin: Two packets which both "
633 "claim to be the last one in the "
634 "sequence have been received.");
637 pkt_lastseq = pkt_sequence;
638 DEBUG ("Last sequence = %i;", pkt_lastseq);
642 * Enough with the checks. Copy the data now.
643 * We start by allocating some more memory.
645 DEBUG ("realloc (%p, %i)", (void *) *res_data,
646 (items_num + pkt_item_num) * res_item_size);
647 items = realloc ((void *) *res_data,
648 (items_num + pkt_item_num) * res_item_size);
652 ERROR ("ntpd plugin: realloc failed.");
655 items_num += pkt_item_num;
658 for (i = 0; i < pkt_item_num; i++)
660 /* dst: There are already `*res_items' items with
661 * res_item_size bytes each in in `*res_data'. Set
662 * dst to the first byte after that. */
663 void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
664 /* src: We use `pkt_item_len' to calculate the offset
665 * from the beginning of the packet, because the
666 * items in the packet may be smaller than the
667 * items that were requested. We skip `i' such
669 void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
671 /* Set the padding to zeros */
672 if (pkt_padding != 0)
673 memset (dst, '\0', res_item_size);
674 memcpy (dst, src, (size_t) pkt_item_len);
676 /* Increment `*res_items' by one, so `dst' will end up
677 * one further in the next round. */
679 } /* for (pkt_item_num) */
681 pkt_recvd[pkt_sequence] = (char) 1;
684 if ((pkt_recvd_num - 1) == pkt_lastseq)
686 } /* while (done == 0) */
689 } /* int ntpd_receive_response */
691 /* For a description of the arguments see `ntpd_do_query' below. */
692 static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
699 assert (req_items >= 0);
700 assert (req_size >= 0);
702 if ((sd = ntpd_connect ()) < 0)
705 memset ((void *) &req, '\0', sizeof (req));
706 req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
707 req.auth_seq = AUTH_SEQ (0, 0);
708 req.implementation = IMPL_XNTPD;
709 req.request = (unsigned char) req_code;
711 req_data_len = (size_t) (req_items * req_size);
713 assert (((req_data != NULL) && (req_data_len > 0))
714 || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
716 req.err_nitems = ERR_NITEMS (0, req_items);
717 req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
719 if (req_data != NULL)
720 memcpy ((void *) req.data, (const void *) req_data, req_data_len);
722 DEBUG ("req_items = %i; req_size = %i; req_data = %p;",
723 req_items, req_size, (void *) req_data);
725 status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
728 DEBUG ("`swrite' failed. Closing socket #%i", sd);
730 sock_descr = sd = -1;
740 * req_code: Type of request packet
741 * req_items: Numver of items in the request
742 * req_size: Size of one item in the request
743 * req_data: Data of the request packet
744 * res_items: Pointer to where the number returned items will be stored.
745 * res_size: Pointer to where the size of one returned item will be stored.
746 * res_data: This is where a pointer to the (allocated) data will be stored.
747 * res_item_size: Size of one returned item. (used to calculate padding)
749 * returns: zero upon success, non-zero otherwise.
751 static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
752 int *res_items, int *res_size, char **res_data, int res_item_size)
756 status = ntpd_send_request (req_code, req_items, req_size, req_data);
760 status = ntpd_receive_response (req_code, res_items, res_size, res_data,
765 static double ntpd_read_fp (int32_t val_int)
769 val_int = ntohl (val_int);
770 val_double = ((double) val_int) / FP_FRAC;
775 static int ntpd_read (void)
777 struct info_kernel *ik;
781 struct info_peer_summary *ps;
792 status = ntpd_do_query (REQ_GET_KERNEL,
793 0, 0, NULL, /* request data */
794 &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
795 sizeof (struct info_kernel));
799 DEBUG ("ntpd_do_query failed with status %i", status);
802 if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
804 DEBUG ("ntpd_do_query returned: ik = %p; ik_num = %i; ik_size = %i;",
805 (void *) ik, ik_num, ik_size);
809 /* kerninfo -> estimated error */
811 DEBUG ("info_kernel:\n"
812 " pll offset = %.8f\n"
813 " pll frequency = %.8f\n" /* drift compensation */
814 " est error = %.8f\n",
815 ntpd_read_fp (ik->offset),
816 ntpd_read_fp (ik->freq),
817 ntpd_read_fp (ik->esterror));
819 ntpd_submit ("frequency_offset", "loop", ntpd_read_fp (ik->freq));
820 ntpd_submit ("time_offset", "loop", ntpd_read_fp (ik->offset));
821 ntpd_submit ("time_offset", "error", ntpd_read_fp (ik->esterror));
826 status = ntpd_do_query (REQ_PEER_LIST_SUM,
827 0, 0, NULL, /* request data */
828 &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
829 sizeof (struct info_peer_summary));
832 DEBUG ("ntpd_do_query failed with status %i", status);
835 if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
837 DEBUG ("ntpd_do_query returned: ps = %p; ps_num = %i; ps_size = %i;",
838 (void *) ps, ps_num, ps_size);
842 for (i = 0; i < ps_num; i++)
844 struct info_peer_summary *ptr;
847 char peername[NI_MAXHOST];
854 if (((ntohl (ptr->dstadr) & 0xFFFFFF00) == 0x7F000000) || (ptr->dstadr == 0))
858 /* Convert the `long floating point' offset value to double */
859 M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
863 struct sockaddr_in6 sa;
865 memset (&sa, 0, sizeof (sa));
866 sa.sin6_family = AF_INET6;
867 sa.sin6_port = htons (123);
868 memcpy (&sa.sin6_addr, &ptr->srcadr6, sizeof (struct in6_addr));
870 status = getnameinfo ((const struct sockaddr *) &sa,
872 peername, sizeof (peername),
873 NULL, 0, 0 /* no flags */);
877 ERROR ("ntpd plugin: getnameinfo failed: %s",
878 (status == EAI_SYSTEM)
879 ? sstrerror (errno, errbuf, sizeof (errbuf))
880 : gai_strerror (status));
884 else if ((ntohl (ptr->srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR)
886 struct in_addr addr_obj;
889 refclock_id = (ntohl (ptr->srcadr) >> 8) & 0x000000FF;
891 if (refclock_id < refclock_names_num)
893 strncpy (peername, refclock_names[refclock_id],
898 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
899 addr_obj.s_addr = ptr->srcadr;
900 addr_str = inet_ntoa (addr_obj);
902 strncpy (peername, addr_str, sizeof (peername));
907 struct in_addr addr_obj;
908 struct hostent *addr_he;
911 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
912 addr_obj.s_addr = ptr->srcadr;
913 addr_str = inet_ntoa (addr_obj);
915 addr_he = gethostbyaddr ((const void *) &addr_obj,
916 sizeof (addr_obj), AF_INET);
919 strncpy (peername, addr_he->h_name, sizeof (peername));
923 strncpy (peername, addr_str, sizeof (peername));
934 " dispersion = %f\n",
938 ntpd_read_fp (ptr->delay),
939 ntohl (ptr->offset_int),
940 ntohl (ptr->offset_frc),
942 ntpd_read_fp (ptr->dispersion));
944 if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
945 ntpd_submit ("time_offset", peername, offset);
946 ntpd_submit ("time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
947 if (refclock_id == 0) /* not a reference clock */
948 ntpd_submit ("delay", peername, ntpd_read_fp (ptr->delay));
955 } /* int ntpd_read */
956 #endif /* NTPD_HAVE_READ */
958 void module_register (void)
961 plugin_register_config ("ntpd", ntpd_config,
962 config_keys, config_keys_num);
963 plugin_register_read ("ntpd", ntpd_read);
964 #endif /* NTPD_HAVE_READ */
965 } /* void module_register */