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 = 2;
57 # define NTPD_DEFAULT_HOST "localhost"
58 # define NTPD_DEFAULT_PORT "123"
59 static int sock_descr = -1;
60 static char *ntpd_host = NULL;
61 static char ntpd_port[16];
63 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
64 * The following definitions were copied from the NTPd distribution *
65 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
66 #define MAXFILENAME 128
68 #define MODE_PRIVATE 7
69 #define NTP_OLDVERSION ((u_char) 1) /* oldest credible version */
71 #define FP_FRAC 65536.0
73 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
74 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
76 /* This structure is missing the message authentication code, since collectd
82 uint8_t implementation; /* implementation number */
83 uint8_t request; /* request number */
84 uint16_t err_nitems; /* error code/number of data items */
85 uint16_t mbz_itemsize; /* item size */
86 char data[MAXFILENAME + 48]; /* data area [32 prev](176 byte max) */
87 /* struct conf_peer must fit */
89 #define REQ_LEN_NOMAC (sizeof(struct req_pkt))
92 * A response packet. The length here is variable, this is a
93 * maximally sized one. Note that this implementation doesn't
94 * authenticate responses.
96 #define RESP_HEADER_SIZE (8)
97 #define RESP_DATA_SIZE (500)
101 uint8_t rm_vn_mode; /* response, more, version, mode */
102 uint8_t auth_seq; /* key, sequence number */
103 uint8_t implementation; /* implementation number */
104 uint8_t request; /* request number */
105 uint16_t err_nitems; /* error code/number of data items */
106 uint16_t mbz_itemsize; /* item size */
107 char data[RESP_DATA_SIZE]; /* data area */
111 * Bit setting macros for multifield items.
113 #define RESP_BIT 0x80
114 #define MORE_BIT 0x40
116 #define ISRESPONSE(rm_vn_mode) (((rm_vn_mode)&RESP_BIT)!=0)
117 #define ISMORE(rm_vn_mode) (((rm_vn_mode)&MORE_BIT)!=0)
118 #define INFO_VERSION(rm_vn_mode) ((u_char)(((rm_vn_mode)>>3)&0x7))
119 #define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
121 #define RM_VN_MODE(resp, more, version) \
122 ((u_char)(((resp)?RESP_BIT:0)\
123 |((more)?MORE_BIT:0)\
124 |((version?version:(NTP_OLDVERSION+1))<<3)\
127 #define INFO_IS_AUTH(auth_seq) (((auth_seq) & 0x80) != 0)
128 #define INFO_SEQ(auth_seq) ((auth_seq)&0x7f)
129 #define AUTH_SEQ(auth, seq) ((u_char)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
131 #define INFO_ERR(err_nitems) ((u_short)((ntohs(err_nitems)>>12)&0xf))
132 #define INFO_NITEMS(err_nitems) ((u_short)(ntohs(err_nitems)&0xfff))
133 #define ERR_NITEMS(err, nitems) (htons((u_short)((((u_short)(err)<<12)&0xf000)\
134 |((u_short)(nitems)&0xfff))))
136 #define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
137 #define INFO_ITEMSIZE(mbz_itemsize) ((u_short)(ntohs(mbz_itemsize)&0xfff))
138 #define MBZ_ITEMSIZE(itemsize) (htons((u_short)(itemsize)))
140 /* negate a long float type */
141 #define M_NEG(v_i, v_f) \
144 (v_i) = -((uint32_t)(v_i)); \
146 (v_f) = -((uint32_t)(v_f)); \
151 #define M_LFPTOD(r_i, r_uf, d) \
153 register int32_t i; \
154 register uint32_t f; \
160 (d) = -((double) i + ((double) f) / 4294967296.0); \
162 (d) = (double) i + ((double) f) / 4294967296.0; \
166 #define REQ_PEER_LIST_SUM 1
167 struct info_peer_summary
169 uint32_t dstadr; /* local address (zero for undetermined) */
170 uint32_t srcadr; /* source address */
171 uint16_t srcport; /* source port */
172 uint8_t stratum; /* stratum of peer */
173 int8_t hpoll; /* host polling interval */
174 int8_t ppoll; /* peer polling interval */
175 uint8_t reach; /* reachability register */
176 uint8_t flags; /* flags, from above */
177 uint8_t hmode; /* peer mode */
178 int32_t delay; /* peer.estdelay; s_fp */
179 int32_t offset_int; /* peer.estoffset; integral part */
180 int32_t offset_frc; /* peer.estoffset; fractional part */
181 uint32_t dispersion; /* peer.estdisp; u_fp */
182 uint32_t v6_flag; /* is this v6 or not */
183 uint32_t unused1; /* (unused) padding for dstadr6 */
184 struct in6_addr dstadr6; /* local address (v6) */
185 struct in6_addr srcadr6; /* source address (v6) */
188 #define REQ_SYS_INFO 4
191 uint32_t peer; /* system peer address (v4) */
192 uint8_t peer_mode; /* mode we are syncing to peer in */
193 uint8_t leap; /* system leap bits */
194 uint8_t stratum; /* our stratum */
195 int8_t precision; /* local clock precision */
196 int32_t rootdelay; /* distance from sync source */
197 uint32_t rootdispersion; /* dispersion from sync source */
198 uint32_t refid; /* reference ID of sync source */
199 uint64_t reftime; /* system reference time */
200 uint32_t poll; /* system poll interval */
201 uint8_t flags; /* system flags */
202 uint8_t unused1; /* unused */
203 uint8_t unused2; /* unused */
204 uint8_t unused3; /* unused */
205 int32_t bdelay; /* default broadcast offset */
206 int32_t frequency; /* frequency residual (scaled ppm) */
207 uint64_t authdelay; /* default authentication delay */
208 uint32_t stability; /* clock stability (scaled ppm) */
209 int32_t v6_flag; /* is this v6 or not */
210 int32_t unused4; /* unused, padding for peer6 */
211 struct in6_addr peer6; /* system peer address (v6) */
214 #define REQ_GET_KERNEL 38
236 /* List of reference clock names */
237 static char *refclock_names[] =
239 "UNKNOWN", "LOCAL", "GPS_TRAK", "WWV_PST", /* 0- 3 */
240 "SPECTRACOM", "TRUETIME", "IRIG_AUDIO", "CHU_AUDIO", /* 4- 7 */
241 "GENERIC", "GPS_MX4200", "GPS_AS2201", "GPS_ARBITER", /* 8-11 */
242 "IRIG_TPRO", "ATOM_LEITCH", "MSF_EES", "GPSTM_TRUE", /* 12-15 */
243 "GPS_BANC", "GPS_DATUM", "ACTS_NIST", "WWV_HEATH", /* 16-19 */
244 "GPS_NMEA", "GPS_VME", "PPS", "ACTS_PTB", /* 20-23 */
245 "ACTS_USNO", "TRUETIME", "GPS_HP", "MSF_ARCRON", /* 24-27 */
246 "SHM", "GPS_PALISADE", "GPS_ONCORE", "GPS_JUPITER", /* 28-31 */
247 "CHRONOLOG", "DUMBCLOCK", "ULINK_M320", "PCF", /* 32-35 */
248 "WWV_AUDIO", "GPS_FG", "HOPF_S", "HOPF_P", /* 36-39 */
249 "JJY", "TT_IRIG", "GPS_ZYFER", "GPS_RIPENCC", /* 40-43 */
250 "NEOCLK4X", NULL /* 44 */
252 static int refclock_names_num = 45;
253 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
254 * End of the copied stuff.. *
255 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
257 static int ntpd_config (const char *key, const char *value)
259 if (strcasecmp (key, "Host") == 0)
261 if (ntpd_host != NULL)
263 if ((ntpd_host = strdup (value)) == NULL)
266 else if (strcasecmp (key, "Port") == 0)
268 int port = (int) (atof (value));
269 if ((port > 0) && (port <= 65535))
270 snprintf (ntpd_port, sizeof (ntpd_port),
273 strncpy (ntpd_port, value, sizeof (ntpd_port));
274 ntpd_port[sizeof (ntpd_port) - 1] = '\0';
284 static void ntpd_submit (char *type, char *type_inst, double value)
287 value_list_t vl = VALUE_LIST_INIT;
289 values[0].gauge = value;
293 vl.time = time (NULL);
294 strcpy (vl.host, hostname_g);
295 strcpy (vl.plugin, "ntpd");
296 strcpy (vl.plugin_instance, "");
297 strncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
299 plugin_dispatch_values (type, &vl);
302 /* returns `tv0 - tv1' in milliseconds or 0 if `tv1 > tv0' */
303 static int timeval_sub (const struct timeval *tv0, const struct timeval *tv1)
308 if ((tv0->tv_sec < tv1->tv_sec)
309 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
312 sec = tv0->tv_sec - tv1->tv_sec;
313 usec = tv0->tv_usec - tv1->tv_usec;
324 return ((sec * 1000) + ((usec + 500) / 1000));
327 static int ntpd_connect (void)
332 struct addrinfo ai_hints;
333 struct addrinfo *ai_list;
334 struct addrinfo *ai_ptr;
340 DEBUG ("Opening a new socket");
344 host = NTPD_DEFAULT_HOST;
347 if (strlen (port) == 0)
348 port = NTPD_DEFAULT_PORT;
350 memset (&ai_hints, '\0', sizeof (ai_hints));
351 ai_hints.ai_flags = 0;
353 ai_hints.ai_flags |= AI_ADDRCONFIG;
355 ai_hints.ai_family = PF_UNSPEC;
356 ai_hints.ai_socktype = SOCK_DGRAM;
357 ai_hints.ai_protocol = IPPROTO_UDP;
359 if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
362 ERROR ("ntpd plugin: getaddrinfo (%s, %s): %s",
364 (status == EAI_SYSTEM)
365 ? sstrerror (errno, errbuf, sizeof (errbuf))
366 : gai_strerror (status));
370 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
372 /* create our socket descriptor */
373 if ((sock_descr = socket (ai_ptr->ai_family,
375 ai_ptr->ai_protocol)) < 0)
378 /* connect to the ntpd */
379 if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
389 freeaddrinfo (ai_list);
393 DEBUG ("Unable to connect to server.");
394 ERROR ("ntpd plugin: Unable to connect to server.");
400 /* For a description of the arguments see `ntpd_do_query' below. */
401 static int ntpd_receive_response (int req_code, int *res_items, int *res_size,
402 char **res_data, int res_item_size)
405 struct pollfd poll_s;
414 struct timeval time_end;
415 struct timeval time_now;
418 int pkt_item_num; /* items in this packet */
419 int pkt_item_len; /* size of the items in this packet */
421 char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
422 int pkt_recvd_num; /* number of packets that have been received */
423 int pkt_lastseq; /* the last sequence number */
424 ssize_t pkt_padding; /* Padding in this packet */
426 if ((sd = ntpd_connect ()) < 0)
432 memset (pkt_recvd, '\0', sizeof (pkt_recvd));
440 if (gettimeofday (&time_end, NULL) < 0)
443 ERROR ("ntpd plugin: gettimeofday failed: %s",
444 sstrerror (errno, errbuf, sizeof (errbuf)));
447 time_end.tv_sec++; /* wait for a most one second */
452 if (gettimeofday (&time_now, NULL) < 0)
455 ERROR ("ntpd plugin: gettimeofday failed: %s",
456 sstrerror (errno, errbuf, sizeof (errbuf)));
460 /* timeout reached */
461 if ((timeout = timeval_sub (&time_end, &time_now)) == 0)
465 poll_s.events = POLLIN | POLLPRI;
468 DEBUG ("Polling for %ims", timeout);
469 status = poll (&poll_s, 1, timeout);
471 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
477 ERROR ("ntpd plugin: poll failed: %s",
478 sstrerror (errno, errbuf, sizeof (errbuf)));
482 if (status == 0) /* timeout */
484 DEBUG ("timeout reached.");
488 memset ((void *) &res, '\0', sizeof (res));
489 status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
491 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
497 DEBUG ("recv(2) failed: %s",
498 sstrerror (errno, errbuf, sizeof (errbuf)));
499 DEBUG ("Closing socket #%i", sd);
501 sock_descr = sd = -1;
505 DEBUG ("recv'd %i bytes", status);
508 * Do some sanity checks first
510 if (status < RESP_HEADER_SIZE)
512 WARNING ("ntpd plugin: Short (%i bytes) packet received",
516 if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
518 NOTICE ("ntpd plugin: Packet received with mode %i",
519 INFO_MODE (res.rm_vn_mode));
522 if (INFO_IS_AUTH (res.auth_seq))
524 NOTICE ("ntpd plugin: Encrypted packet received");
527 if (!ISRESPONSE (res.rm_vn_mode))
529 NOTICE ("ntpd plugin: Received request packet, "
533 if (INFO_MBZ (res.mbz_itemsize))
535 WARNING ("ntpd plugin: Received packet with nonzero "
539 if (res.implementation != IMPL_XNTPD)
541 WARNING ("ntpd plugin: Asked for request of type %i, "
542 "got %i", (int) IMPL_XNTPD, (int) res.implementation);
546 /* Check for error code */
547 if (INFO_ERR (res.err_nitems) != 0)
549 ERROR ("ntpd plugin: Received error code %i",
550 (int) INFO_ERR(res.err_nitems));
551 return ((int) INFO_ERR (res.err_nitems));
554 /* extract number of items in this packet and the size of these items */
555 pkt_item_num = INFO_NITEMS (res.err_nitems);
556 pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
557 DEBUG ("pkt_item_num = %i; pkt_item_len = %i;",
558 pkt_item_num, pkt_item_len);
560 /* Check if the reported items fit in the packet */
561 if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
563 ERROR ("ntpd plugin: %i items * %i bytes > "
564 "%i bytes - %i bytes header",
565 (int) pkt_item_num, (int) pkt_item_len,
566 (int) status, (int) RESP_HEADER_SIZE);
570 if (pkt_item_len > res_item_size)
572 ERROR ("ntpd plugin: (pkt_item_len = %i) "
573 ">= (res_item_size = %i)",
574 pkt_item_len, res_item_size);
578 /* If this is the first packet (time wise, not sequence wise),
579 * set `res_size'. If it's not the first packet check if the
580 * items have the same size. Discard invalid packets. */
581 if (items_num == 0) /* first packet */
583 DEBUG ("*res_size = %i", pkt_item_len);
584 *res_size = pkt_item_len;
586 else if (*res_size != pkt_item_len)
588 DEBUG ("Error: *res_size = %i; pkt_item_len = %i;",
589 *res_size, pkt_item_len);
590 ERROR ("Item sizes differ.");
595 * Because the items in the packet may be smaller than the
596 * items requested, the following holds true:
598 assert ((*res_size == pkt_item_len)
599 && (pkt_item_len <= res_item_size));
601 /* Calculate the padding. No idea why there might be any padding.. */
603 if (pkt_item_len < res_item_size)
604 pkt_padding = res_item_size - pkt_item_len;
605 DEBUG ("res_item_size = %i; pkt_padding = %i;",
606 res_item_size, pkt_padding);
608 /* Extract the sequence number */
609 pkt_sequence = INFO_SEQ (res.auth_seq);
610 if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
612 ERROR ("ntpd plugin: Received packet with sequence %i",
617 /* Check if this sequence has been received before. If so, discard it. */
618 if (pkt_recvd[pkt_sequence] != '\0')
620 NOTICE ("ntpd plugin: Sequence %i received twice",
625 /* If `pkt_lastseq != -1' another packet without `more bit' has
627 if (!ISMORE (res.rm_vn_mode))
629 if (pkt_lastseq != -1)
631 ERROR ("ntpd plugin: Two packets which both "
632 "claim to be the last one in the "
633 "sequence have been received.");
636 pkt_lastseq = pkt_sequence;
637 DEBUG ("Last sequence = %i;", pkt_lastseq);
641 * Enough with the checks. Copy the data now.
642 * We start by allocating some more memory.
644 DEBUG ("realloc (%p, %i)", (void *) *res_data,
645 (items_num + pkt_item_num) * res_item_size);
646 items = realloc ((void *) *res_data,
647 (items_num + pkt_item_num) * res_item_size);
651 ERROR ("ntpd plugin: realloc failed.");
654 items_num += pkt_item_num;
657 for (i = 0; i < pkt_item_num; i++)
659 /* dst: There are already `*res_items' items with
660 * res_item_size bytes each in in `*res_data'. Set
661 * dst to the first byte after that. */
662 void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
663 /* src: We use `pkt_item_len' to calculate the offset
664 * from the beginning of the packet, because the
665 * items in the packet may be smaller than the
666 * items that were requested. We skip `i' such
668 void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
670 /* Set the padding to zeros */
671 if (pkt_padding != 0)
672 memset (dst, '\0', res_item_size);
673 memcpy (dst, src, (size_t) pkt_item_len);
675 /* Increment `*res_items' by one, so `dst' will end up
676 * one further in the next round. */
678 } /* for (pkt_item_num) */
680 pkt_recvd[pkt_sequence] = (char) 1;
683 if ((pkt_recvd_num - 1) == pkt_lastseq)
685 } /* while (done == 0) */
688 } /* int ntpd_receive_response */
690 /* For a description of the arguments see `ntpd_do_query' below. */
691 static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
698 assert (req_items >= 0);
699 assert (req_size >= 0);
701 if ((sd = ntpd_connect ()) < 0)
704 memset ((void *) &req, '\0', sizeof (req));
705 req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
706 req.auth_seq = AUTH_SEQ (0, 0);
707 req.implementation = IMPL_XNTPD;
708 req.request = (unsigned char) req_code;
710 req_data_len = (size_t) (req_items * req_size);
712 assert (((req_data != NULL) && (req_data_len > 0))
713 || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
715 req.err_nitems = ERR_NITEMS (0, req_items);
716 req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
718 if (req_data != NULL)
719 memcpy ((void *) req.data, (const void *) req_data, req_data_len);
721 DEBUG ("req_items = %i; req_size = %i; req_data = %p;",
722 req_items, req_size, (void *) req_data);
724 status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
727 DEBUG ("`swrite' failed. Closing socket #%i", sd);
729 sock_descr = sd = -1;
739 * req_code: Type of request packet
740 * req_items: Numver of items in the request
741 * req_size: Size of one item in the request
742 * req_data: Data of the request packet
743 * res_items: Pointer to where the number returned items will be stored.
744 * res_size: Pointer to where the size of one returned item will be stored.
745 * res_data: This is where a pointer to the (allocated) data will be stored.
746 * res_item_size: Size of one returned item. (used to calculate padding)
748 * returns: zero upon success, non-zero otherwise.
750 static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
751 int *res_items, int *res_size, char **res_data, int res_item_size)
755 status = ntpd_send_request (req_code, req_items, req_size, req_data);
759 status = ntpd_receive_response (req_code, res_items, res_size, res_data,
764 static double ntpd_read_fp (int32_t val_int)
768 val_int = ntohl (val_int);
769 val_double = ((double) val_int) / FP_FRAC;
774 static int ntpd_read (void)
776 struct info_kernel *ik;
780 struct info_peer_summary *ps;
791 status = ntpd_do_query (REQ_GET_KERNEL,
792 0, 0, NULL, /* request data */
793 &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
794 sizeof (struct info_kernel));
798 DEBUG ("ntpd_do_query failed with status %i", status);
801 if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
803 DEBUG ("ntpd_do_query returned: ik = %p; ik_num = %i; ik_size = %i;",
804 (void *) ik, ik_num, ik_size);
808 /* kerninfo -> estimated error */
810 DEBUG ("info_kernel:\n"
811 " pll offset = %.8f\n"
812 " pll frequency = %.8f\n" /* drift compensation */
813 " est error = %.8f\n",
814 ntpd_read_fp (ik->offset),
815 ntpd_read_fp (ik->freq),
816 ntpd_read_fp (ik->esterror));
818 ntpd_submit ("frequency_offset", "loop", ntpd_read_fp (ik->freq));
819 ntpd_submit ("time_offset", "loop", ntpd_read_fp (ik->offset));
820 ntpd_submit ("time_offset", "error", ntpd_read_fp (ik->esterror));
825 status = ntpd_do_query (REQ_PEER_LIST_SUM,
826 0, 0, NULL, /* request data */
827 &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
828 sizeof (struct info_peer_summary));
831 DEBUG ("ntpd_do_query failed with status %i", status);
834 if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
836 DEBUG ("ntpd_do_query returned: ps = %p; ps_num = %i; ps_size = %i;",
837 (void *) ps, ps_num, ps_size);
841 for (i = 0; i < ps_num; i++)
843 struct info_peer_summary *ptr;
846 char peername[NI_MAXHOST];
853 if (((ntohl (ptr->dstadr) & 0xFFFFFF00) == 0x7F000000) || (ptr->dstadr == 0))
857 /* Convert the `long floating point' offset value to double */
858 M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
862 struct sockaddr_in6 sa;
864 memset (&sa, 0, sizeof (sa));
865 sa.sin6_family = AF_INET6;
866 sa.sin6_port = htons (123);
867 memcpy (&sa.sin6_addr, &ptr->srcadr6, sizeof (struct in6_addr));
869 status = getnameinfo ((const struct sockaddr *) &sa,
871 peername, sizeof (peername),
872 NULL, 0, 0 /* no flags */);
876 ERROR ("ntpd plugin: getnameinfo failed: %s",
877 (status == EAI_SYSTEM)
878 ? sstrerror (errno, errbuf, sizeof (errbuf))
879 : gai_strerror (status));
883 else if ((ntohl (ptr->srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR)
885 struct in_addr addr_obj;
888 refclock_id = (ntohl (ptr->srcadr) >> 8) & 0x000000FF;
890 if (refclock_id < refclock_names_num)
892 strncpy (peername, refclock_names[refclock_id],
897 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
898 addr_obj.s_addr = ptr->srcadr;
899 addr_str = inet_ntoa (addr_obj);
901 strncpy (peername, addr_str, sizeof (peername));
906 struct in_addr addr_obj;
907 struct hostent *addr_he;
910 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
911 addr_obj.s_addr = ptr->srcadr;
912 addr_str = inet_ntoa (addr_obj);
914 addr_he = gethostbyaddr ((const void *) &addr_obj,
915 sizeof (addr_obj), AF_INET);
918 strncpy (peername, addr_he->h_name, sizeof (peername));
922 strncpy (peername, addr_str, sizeof (peername));
933 " dispersion = %f\n",
937 ntpd_read_fp (ptr->delay),
938 ntohl (ptr->offset_int),
939 ntohl (ptr->offset_frc),
941 ntpd_read_fp (ptr->dispersion));
943 if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
944 ntpd_submit ("time_offset", peername, offset);
945 ntpd_submit ("time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
946 if (refclock_id == 0) /* not a reference clock */
947 ntpd_submit ("delay", peername, ntpd_read_fp (ptr->delay));
954 } /* int ntpd_read */
956 void module_register (void)
958 plugin_register_config ("ntpd", ntpd_config,
959 config_keys, config_keys_num);
960 plugin_register_read ("ntpd", ntpd_read);
961 } /* void module_register */