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[16];
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 int port = (int) (atof (value));
276 if ((port > 0) && (port <= 65535))
277 snprintf (ntpd_port, sizeof (ntpd_port),
280 strncpy (ntpd_port, value, sizeof (ntpd_port));
281 ntpd_port[sizeof (ntpd_port) - 1] = '\0';
291 static void ntpd_submit (char *type, char *type_inst, double value)
294 value_list_t vl = VALUE_LIST_INIT;
296 values[0].gauge = value;
300 vl.time = time (NULL);
301 strcpy (vl.host, hostname_g);
302 strcpy (vl.plugin, "ntpd");
303 strcpy (vl.plugin_instance, "");
304 strncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
306 plugin_dispatch_values (type, &vl);
309 /* returns `tv0 - tv1' in milliseconds or 0 if `tv1 > tv0' */
310 static int timeval_sub (const struct timeval *tv0, const struct timeval *tv1)
315 if ((tv0->tv_sec < tv1->tv_sec)
316 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
319 sec = tv0->tv_sec - tv1->tv_sec;
320 usec = tv0->tv_usec - tv1->tv_usec;
331 return ((sec * 1000) + ((usec + 500) / 1000));
334 static int ntpd_connect (void)
339 struct addrinfo ai_hints;
340 struct addrinfo *ai_list;
341 struct addrinfo *ai_ptr;
347 DEBUG ("Opening a new socket");
351 host = NTPD_DEFAULT_HOST;
354 if (strlen (port) == 0)
355 port = NTPD_DEFAULT_PORT;
357 memset (&ai_hints, '\0', sizeof (ai_hints));
358 ai_hints.ai_flags = 0;
360 ai_hints.ai_flags |= AI_ADDRCONFIG;
362 ai_hints.ai_family = PF_UNSPEC;
363 ai_hints.ai_socktype = SOCK_DGRAM;
364 ai_hints.ai_protocol = IPPROTO_UDP;
366 if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
369 ERROR ("ntpd plugin: getaddrinfo (%s, %s): %s",
371 (status == EAI_SYSTEM)
372 ? sstrerror (errno, errbuf, sizeof (errbuf))
373 : gai_strerror (status));
377 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
379 /* create our socket descriptor */
380 if ((sock_descr = socket (ai_ptr->ai_family,
382 ai_ptr->ai_protocol)) < 0)
385 /* connect to the ntpd */
386 if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
396 freeaddrinfo (ai_list);
400 DEBUG ("Unable to connect to server.");
401 ERROR ("ntpd plugin: Unable to connect to server.");
407 /* For a description of the arguments see `ntpd_do_query' below. */
408 static int ntpd_receive_response (int req_code, int *res_items, int *res_size,
409 char **res_data, int res_item_size)
412 struct pollfd poll_s;
421 struct timeval time_end;
422 struct timeval time_now;
425 int pkt_item_num; /* items in this packet */
426 int pkt_item_len; /* size of the items in this packet */
428 char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
429 int pkt_recvd_num; /* number of packets that have been received */
430 int pkt_lastseq; /* the last sequence number */
431 ssize_t pkt_padding; /* Padding in this packet */
433 if ((sd = ntpd_connect ()) < 0)
439 memset (pkt_recvd, '\0', sizeof (pkt_recvd));
447 if (gettimeofday (&time_end, NULL) < 0)
450 ERROR ("ntpd plugin: gettimeofday failed: %s",
451 sstrerror (errno, errbuf, sizeof (errbuf)));
454 time_end.tv_sec++; /* wait for a most one second */
459 if (gettimeofday (&time_now, NULL) < 0)
462 ERROR ("ntpd plugin: gettimeofday failed: %s",
463 sstrerror (errno, errbuf, sizeof (errbuf)));
467 /* timeout reached */
468 if ((timeout = timeval_sub (&time_end, &time_now)) == 0)
472 poll_s.events = POLLIN | POLLPRI;
475 DEBUG ("Polling for %ims", timeout);
476 status = poll (&poll_s, 1, timeout);
478 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
484 ERROR ("ntpd plugin: poll failed: %s",
485 sstrerror (errno, errbuf, sizeof (errbuf)));
489 if (status == 0) /* timeout */
491 DEBUG ("timeout reached.");
495 memset ((void *) &res, '\0', sizeof (res));
496 status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
498 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
504 DEBUG ("recv(2) failed: %s",
505 sstrerror (errno, errbuf, sizeof (errbuf)));
506 DEBUG ("Closing socket #%i", sd);
508 sock_descr = sd = -1;
512 DEBUG ("recv'd %i bytes", status);
515 * Do some sanity checks first
517 if (status < RESP_HEADER_SIZE)
519 WARNING ("ntpd plugin: Short (%i bytes) packet received",
523 if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
525 NOTICE ("ntpd plugin: Packet received with mode %i",
526 INFO_MODE (res.rm_vn_mode));
529 if (INFO_IS_AUTH (res.auth_seq))
531 NOTICE ("ntpd plugin: Encrypted packet received");
534 if (!ISRESPONSE (res.rm_vn_mode))
536 NOTICE ("ntpd plugin: Received request packet, "
540 if (INFO_MBZ (res.mbz_itemsize))
542 WARNING ("ntpd plugin: Received packet with nonzero "
546 if (res.implementation != IMPL_XNTPD)
548 WARNING ("ntpd plugin: Asked for request of type %i, "
549 "got %i", (int) IMPL_XNTPD, (int) res.implementation);
553 /* Check for error code */
554 if (INFO_ERR (res.err_nitems) != 0)
556 ERROR ("ntpd plugin: Received error code %i",
557 (int) INFO_ERR(res.err_nitems));
558 return ((int) INFO_ERR (res.err_nitems));
561 /* extract number of items in this packet and the size of these items */
562 pkt_item_num = INFO_NITEMS (res.err_nitems);
563 pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
564 DEBUG ("pkt_item_num = %i; pkt_item_len = %i;",
565 pkt_item_num, pkt_item_len);
567 /* Check if the reported items fit in the packet */
568 if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
570 ERROR ("ntpd plugin: %i items * %i bytes > "
571 "%i bytes - %i bytes header",
572 (int) pkt_item_num, (int) pkt_item_len,
573 (int) status, (int) RESP_HEADER_SIZE);
577 if (pkt_item_len > res_item_size)
579 ERROR ("ntpd plugin: (pkt_item_len = %i) "
580 ">= (res_item_size = %i)",
581 pkt_item_len, res_item_size);
585 /* If this is the first packet (time wise, not sequence wise),
586 * set `res_size'. If it's not the first packet check if the
587 * items have the same size. Discard invalid packets. */
588 if (items_num == 0) /* first packet */
590 DEBUG ("*res_size = %i", pkt_item_len);
591 *res_size = pkt_item_len;
593 else if (*res_size != pkt_item_len)
595 DEBUG ("Error: *res_size = %i; pkt_item_len = %i;",
596 *res_size, pkt_item_len);
597 ERROR ("Item sizes differ.");
602 * Because the items in the packet may be smaller than the
603 * items requested, the following holds true:
605 assert ((*res_size == pkt_item_len)
606 && (pkt_item_len <= res_item_size));
608 /* Calculate the padding. No idea why there might be any padding.. */
610 if (pkt_item_len < res_item_size)
611 pkt_padding = res_item_size - pkt_item_len;
612 DEBUG ("res_item_size = %i; pkt_padding = %i;",
613 res_item_size, pkt_padding);
615 /* Extract the sequence number */
616 pkt_sequence = INFO_SEQ (res.auth_seq);
617 if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
619 ERROR ("ntpd plugin: Received packet with sequence %i",
624 /* Check if this sequence has been received before. If so, discard it. */
625 if (pkt_recvd[pkt_sequence] != '\0')
627 NOTICE ("ntpd plugin: Sequence %i received twice",
632 /* If `pkt_lastseq != -1' another packet without `more bit' has
634 if (!ISMORE (res.rm_vn_mode))
636 if (pkt_lastseq != -1)
638 ERROR ("ntpd plugin: Two packets which both "
639 "claim to be the last one in the "
640 "sequence have been received.");
643 pkt_lastseq = pkt_sequence;
644 DEBUG ("Last sequence = %i;", pkt_lastseq);
648 * Enough with the checks. Copy the data now.
649 * We start by allocating some more memory.
651 DEBUG ("realloc (%p, %i)", (void *) *res_data,
652 (items_num + pkt_item_num) * res_item_size);
653 items = realloc ((void *) *res_data,
654 (items_num + pkt_item_num) * res_item_size);
658 ERROR ("ntpd plugin: realloc failed.");
661 items_num += pkt_item_num;
664 for (i = 0; i < pkt_item_num; i++)
666 /* dst: There are already `*res_items' items with
667 * res_item_size bytes each in in `*res_data'. Set
668 * dst to the first byte after that. */
669 void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
670 /* src: We use `pkt_item_len' to calculate the offset
671 * from the beginning of the packet, because the
672 * items in the packet may be smaller than the
673 * items that were requested. We skip `i' such
675 void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
677 /* Set the padding to zeros */
678 if (pkt_padding != 0)
679 memset (dst, '\0', res_item_size);
680 memcpy (dst, src, (size_t) pkt_item_len);
682 /* Increment `*res_items' by one, so `dst' will end up
683 * one further in the next round. */
685 } /* for (pkt_item_num) */
687 pkt_recvd[pkt_sequence] = (char) 1;
690 if ((pkt_recvd_num - 1) == pkt_lastseq)
692 } /* while (done == 0) */
695 } /* int ntpd_receive_response */
697 /* For a description of the arguments see `ntpd_do_query' below. */
698 static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
705 assert (req_items >= 0);
706 assert (req_size >= 0);
708 if ((sd = ntpd_connect ()) < 0)
711 memset ((void *) &req, '\0', sizeof (req));
712 req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
713 req.auth_seq = AUTH_SEQ (0, 0);
714 req.implementation = IMPL_XNTPD;
715 req.request = (unsigned char) req_code;
717 req_data_len = (size_t) (req_items * req_size);
719 assert (((req_data != NULL) && (req_data_len > 0))
720 || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
722 req.err_nitems = ERR_NITEMS (0, req_items);
723 req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
725 if (req_data != NULL)
726 memcpy ((void *) req.data, (const void *) req_data, req_data_len);
728 DEBUG ("req_items = %i; req_size = %i; req_data = %p;",
729 req_items, req_size, (void *) req_data);
731 status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
734 DEBUG ("`swrite' failed. Closing socket #%i", sd);
736 sock_descr = sd = -1;
746 * req_code: Type of request packet
747 * req_items: Numver of items in the request
748 * req_size: Size of one item in the request
749 * req_data: Data of the request packet
750 * res_items: Pointer to where the number returned items will be stored.
751 * res_size: Pointer to where the size of one returned item will be stored.
752 * res_data: This is where a pointer to the (allocated) data will be stored.
753 * res_item_size: Size of one returned item. (used to calculate padding)
755 * returns: zero upon success, non-zero otherwise.
757 static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
758 int *res_items, int *res_size, char **res_data, int res_item_size)
762 status = ntpd_send_request (req_code, req_items, req_size, req_data);
766 status = ntpd_receive_response (req_code, res_items, res_size, res_data,
771 static double ntpd_read_fp (int32_t val_int)
775 val_int = ntohl (val_int);
776 val_double = ((double) val_int) / FP_FRAC;
781 static int ntpd_read (void)
783 struct info_kernel *ik;
787 struct info_peer_summary *ps;
798 status = ntpd_do_query (REQ_GET_KERNEL,
799 0, 0, NULL, /* request data */
800 &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
801 sizeof (struct info_kernel));
805 DEBUG ("ntpd_do_query failed with status %i", status);
808 if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
810 DEBUG ("ntpd_do_query returned: ik = %p; ik_num = %i; ik_size = %i;",
811 (void *) ik, ik_num, ik_size);
815 /* kerninfo -> estimated error */
817 DEBUG ("info_kernel:\n"
818 " pll offset = %.8f\n"
819 " pll frequency = %.8f\n" /* drift compensation */
820 " est error = %.8f\n",
821 ntpd_read_fp (ik->offset),
822 ntpd_read_fp (ik->freq),
823 ntpd_read_fp (ik->esterror));
825 ntpd_submit ("frequency_offset", "loop", ntpd_read_fp (ik->freq));
826 ntpd_submit ("time_offset", "loop", ntpd_read_fp (ik->offset));
827 ntpd_submit ("time_offset", "error", ntpd_read_fp (ik->esterror));
832 status = ntpd_do_query (REQ_PEER_LIST_SUM,
833 0, 0, NULL, /* request data */
834 &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
835 sizeof (struct info_peer_summary));
838 DEBUG ("ntpd_do_query failed with status %i", status);
841 if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
843 DEBUG ("ntpd_do_query returned: ps = %p; ps_num = %i; ps_size = %i;",
844 (void *) ps, ps_num, ps_size);
848 for (i = 0; i < ps_num; i++)
850 struct info_peer_summary *ptr;
853 char peername[NI_MAXHOST];
860 if (((ntohl (ptr->dstadr) & 0xFFFFFF00) == 0x7F000000) || (ptr->dstadr == 0))
864 /* Convert the `long floating point' offset value to double */
865 M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
869 struct sockaddr_in6 sa;
871 memset (&sa, 0, sizeof (sa));
872 sa.sin6_family = AF_INET6;
873 sa.sin6_port = htons (123);
874 memcpy (&sa.sin6_addr, &ptr->srcadr6, sizeof (struct in6_addr));
876 status = getnameinfo ((const struct sockaddr *) &sa,
878 peername, sizeof (peername),
879 NULL, 0, 0 /* no flags */);
883 ERROR ("ntpd plugin: getnameinfo failed: %s",
884 (status == EAI_SYSTEM)
885 ? sstrerror (errno, errbuf, sizeof (errbuf))
886 : gai_strerror (status));
890 else if ((ntohl (ptr->srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR)
892 struct in_addr addr_obj;
895 refclock_id = (ntohl (ptr->srcadr) >> 8) & 0x000000FF;
897 if (refclock_id < refclock_names_num)
899 strncpy (peername, refclock_names[refclock_id],
904 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
905 addr_obj.s_addr = ptr->srcadr;
906 addr_str = inet_ntoa (addr_obj);
908 strncpy (peername, addr_str, sizeof (peername));
913 struct in_addr addr_obj;
914 struct hostent *addr_he;
917 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
918 addr_obj.s_addr = ptr->srcadr;
919 addr_str = inet_ntoa (addr_obj);
921 addr_he = gethostbyaddr ((const void *) &addr_obj,
922 sizeof (addr_obj), AF_INET);
925 strncpy (peername, addr_he->h_name, sizeof (peername));
929 strncpy (peername, addr_str, sizeof (peername));
940 " dispersion = %f\n",
944 ntpd_read_fp (ptr->delay),
945 ntohl (ptr->offset_int),
946 ntohl (ptr->offset_frc),
948 ntpd_read_fp (ptr->dispersion));
950 if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
951 ntpd_submit ("time_offset", peername, offset);
952 ntpd_submit ("time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
953 if (refclock_id == 0) /* not a reference clock */
954 ntpd_submit ("delay", peername, ntpd_read_fp (ptr->delay));
961 } /* int ntpd_read */
962 #endif /* NTPD_HAVE_READ */
964 void module_register (void)
967 plugin_register_config ("ntpd", ntpd_config,
968 config_keys, config_keys_num);
969 plugin_register_read ("ntpd", ntpd_read);
970 #endif /* NTPD_HAVE_READ */
971 } /* void module_register */