2 * collectd - src/ntpd.c
3 * Copyright (C) 2006-2012 Florian octo Forster
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 * Florian octo Forster <octo at collectd.org>
27 #define _BSD_SOURCE /* For NI_MAXHOST */
32 #include "configfile.h"
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 const char *config_keys[] =
63 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
65 static _Bool do_reverse_lookups = 1;
67 /* This option only exists for backward compatibility. If it is false and two
68 * ntpd peers use the same refclock driver, the plugin will try to write
69 * simultaneous measurements from both to the same type instance. */
70 static _Bool include_unit_id = 0;
72 # define NTPD_DEFAULT_HOST "localhost"
73 # define NTPD_DEFAULT_PORT "123"
74 static int sock_descr = -1;
75 static char *ntpd_host = NULL;
76 static char ntpd_port[16];
78 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
79 * The following definitions were copied from the NTPd distribution *
80 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
81 #define MAXFILENAME 128
83 #define MODE_PRIVATE 7
84 #define NTP_OLDVERSION ((uint8_t) 1) /* oldest credible version */
86 #define FP_FRAC 65536.0
88 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
89 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
91 /* This structure is missing the message authentication code, since collectd
97 uint8_t implementation; /* implementation number */
98 uint8_t request; /* request number */
99 uint16_t err_nitems; /* error code/number of data items */
100 uint16_t mbz_itemsize; /* item size */
101 char data[MAXFILENAME + 48]; /* data area [32 prev](176 byte max) */
102 /* struct conf_peer must fit */
104 #define REQ_LEN_NOMAC (sizeof(struct req_pkt))
107 * A response packet. The length here is variable, this is a
108 * maximally sized one. Note that this implementation doesn't
109 * authenticate responses.
111 #define RESP_HEADER_SIZE (8)
112 #define RESP_DATA_SIZE (500)
116 uint8_t rm_vn_mode; /* response, more, version, mode */
117 uint8_t auth_seq; /* key, sequence number */
118 uint8_t implementation; /* implementation number */
119 uint8_t request; /* request number */
120 uint16_t err_nitems; /* error code/number of data items */
121 uint16_t mbz_itemsize; /* item size */
122 char data[RESP_DATA_SIZE]; /* data area */
126 * Bit setting macros for multifield items.
128 #define RESP_BIT 0x80
129 #define MORE_BIT 0x40
131 #define ISRESPONSE(rm_vn_mode) (((rm_vn_mode)&RESP_BIT)!=0)
132 #define ISMORE(rm_vn_mode) (((rm_vn_mode)&MORE_BIT)!=0)
133 #define INFO_VERSION(rm_vn_mode) ((uint8_t)(((rm_vn_mode)>>3)&0x7))
134 #define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
136 #define RM_VN_MODE(resp, more, version) \
137 ((uint8_t)(((resp)?RESP_BIT:0)\
138 |((more)?MORE_BIT:0)\
139 |((version?version:(NTP_OLDVERSION+1))<<3)\
142 #define INFO_IS_AUTH(auth_seq) (((auth_seq) & 0x80) != 0)
143 #define INFO_SEQ(auth_seq) ((auth_seq)&0x7f)
144 #define AUTH_SEQ(auth, seq) ((uint8_t)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
146 #define INFO_ERR(err_nitems) ((uint16_t)((ntohs(err_nitems)>>12)&0xf))
147 #define INFO_NITEMS(err_nitems) ((uint16_t)(ntohs(err_nitems)&0xfff))
148 #define ERR_NITEMS(err, nitems) (htons((uint16_t)((((uint16_t)(err)<<12)&0xf000)\
149 |((uint16_t)(nitems)&0xfff))))
151 #define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
152 #define INFO_ITEMSIZE(mbz_itemsize) ((uint16_t)(ntohs(mbz_itemsize)&0xfff))
153 #define MBZ_ITEMSIZE(itemsize) (htons((uint16_t)(itemsize)))
155 /* negate a long float type */
156 #define M_NEG(v_i, v_f) \
159 (v_i) = -((uint32_t)(v_i)); \
161 (v_f) = -((uint32_t)(v_f)); \
166 #define M_LFPTOD(r_i, r_uf, d) \
168 register int32_t i; \
169 register uint32_t f; \
175 (d) = -((double) i + ((double) f) / 4294967296.0); \
177 (d) = (double) i + ((double) f) / 4294967296.0; \
181 #define REQ_PEER_LIST_SUM 1
182 struct info_peer_summary
184 uint32_t dstadr; /* local address (zero for undetermined) */
185 uint32_t srcadr; /* source address */
186 uint16_t srcport; /* source port */
187 uint8_t stratum; /* stratum of peer */
188 int8_t hpoll; /* host polling interval */
189 int8_t ppoll; /* peer polling interval */
190 uint8_t reach; /* reachability register */
191 uint8_t flags; /* flags, from above */
192 uint8_t hmode; /* peer mode */
193 int32_t delay; /* peer.estdelay; s_fp */
194 int32_t offset_int; /* peer.estoffset; integral part */
195 int32_t offset_frc; /* peer.estoffset; fractional part */
196 uint32_t dispersion; /* peer.estdisp; u_fp */
197 uint32_t v6_flag; /* is this v6 or not */
198 uint32_t unused1; /* (unused) padding for dstadr6 */
199 struct in6_addr dstadr6; /* local address (v6) */
200 struct in6_addr srcadr6; /* source address (v6) */
203 #define REQ_SYS_INFO 4
206 uint32_t peer; /* system peer address (v4) */
207 uint8_t peer_mode; /* mode we are syncing to peer in */
208 uint8_t leap; /* system leap bits */
209 uint8_t stratum; /* our stratum */
210 int8_t precision; /* local clock precision */
211 int32_t rootdelay; /* distance from sync source */
212 uint32_t rootdispersion; /* dispersion from sync source */
213 uint32_t refid; /* reference ID of sync source */
214 uint64_t reftime; /* system reference time */
215 uint32_t poll; /* system poll interval */
216 uint8_t flags; /* system flags */
217 uint8_t unused1; /* unused */
218 uint8_t unused2; /* unused */
219 uint8_t unused3; /* unused */
220 int32_t bdelay; /* default broadcast offset */
221 int32_t frequency; /* frequency residual (scaled ppm) */
222 uint64_t authdelay; /* default authentication delay */
223 uint32_t stability; /* clock stability (scaled ppm) */
224 int32_t v6_flag; /* is this v6 or not */
225 int32_t unused4; /* unused, padding for peer6 */
226 struct in6_addr peer6; /* system peer address (v6) */
229 #define REQ_GET_KERNEL 38
251 /* List of reference clock names */
252 static char *refclock_names[] =
254 "UNKNOWN", "LOCAL", "GPS_TRAK", "WWV_PST", /* 0- 3 */
255 "SPECTRACOM", "TRUETIME", "IRIG_AUDIO", "CHU_AUDIO", /* 4- 7 */
256 "GENERIC", "GPS_MX4200", "GPS_AS2201", "GPS_ARBITER", /* 8-11 */
257 "IRIG_TPRO", "ATOM_LEITCH", "MSF_EES", "GPSTM_TRUE", /* 12-15 */
258 "GPS_BANC", "GPS_DATUM", "ACTS_NIST", "WWV_HEATH", /* 16-19 */
259 "GPS_NMEA", "GPS_VME", "PPS", "ACTS_PTB", /* 20-23 */
260 "ACTS_USNO", "TRUETIME", "GPS_HP", "MSF_ARCRON", /* 24-27 */
261 "SHM", "GPS_PALISADE", "GPS_ONCORE", "GPS_JUPITER", /* 28-31 */
262 "CHRONOLOG", "DUMBCLOCK", "ULINK_M320", "PCF", /* 32-35 */
263 "WWV_AUDIO", "GPS_FG", "HOPF_S", "HOPF_P", /* 36-39 */
264 "JJY", "TT_IRIG", "GPS_ZYFER", "GPS_RIPENCC", /* 40-43 */
267 static int refclock_names_num = STATIC_ARRAY_SIZE (refclock_names);
268 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
269 * End of the copied stuff.. *
270 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
272 static int ntpd_config (const char *key, const char *value)
274 if (strcasecmp (key, "Host") == 0)
276 if (ntpd_host != NULL)
278 if ((ntpd_host = strdup (value)) == NULL)
281 else if (strcasecmp (key, "Port") == 0)
283 int port = (int) (atof (value));
284 if ((port > 0) && (port <= 65535))
285 ssnprintf (ntpd_port, sizeof (ntpd_port),
288 sstrncpy (ntpd_port, value, sizeof (ntpd_port));
290 else if (strcasecmp (key, "ReverseLookups") == 0)
293 do_reverse_lookups = 1;
295 do_reverse_lookups = 0;
297 else if (strcasecmp (key, "IncludeUnitID") == 0)
312 static void ntpd_submit (char *type, char *type_inst, double value)
315 value_list_t vl = VALUE_LIST_INIT;
317 values[0].gauge = value;
321 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
322 sstrncpy (vl.plugin, "ntpd", sizeof (vl.plugin));
323 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
324 sstrncpy (vl.type, type, sizeof (vl.type));
325 sstrncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
327 plugin_dispatch_values (&vl);
330 /* Each time a peer is polled, ntpd shifts the reach register to the left and
331 * sets the LSB based on whether the peer was reachable. If the LSB is zero,
332 * the values are out of date. */
333 static void ntpd_submit_reach (char *type, char *type_inst, uint8_t reach,
339 ntpd_submit (type, type_inst, value);
342 static int ntpd_connect (void)
347 struct addrinfo ai_hints;
348 struct addrinfo *ai_list;
349 struct addrinfo *ai_ptr;
355 DEBUG ("Opening a new socket");
359 host = NTPD_DEFAULT_HOST;
362 if (strlen (port) == 0)
363 port = NTPD_DEFAULT_PORT;
365 memset (&ai_hints, '\0', sizeof (ai_hints));
366 ai_hints.ai_flags = 0;
368 ai_hints.ai_flags |= AI_ADDRCONFIG;
370 ai_hints.ai_family = PF_UNSPEC;
371 ai_hints.ai_socktype = SOCK_DGRAM;
372 ai_hints.ai_protocol = IPPROTO_UDP;
374 if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
377 ERROR ("ntpd plugin: getaddrinfo (%s, %s): %s",
379 (status == EAI_SYSTEM)
380 ? sstrerror (errno, errbuf, sizeof (errbuf))
381 : gai_strerror (status));
385 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
387 /* create our socket descriptor */
388 if ((sock_descr = socket (ai_ptr->ai_family,
390 ai_ptr->ai_protocol)) < 0)
393 /* connect to the ntpd */
394 if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
404 freeaddrinfo (ai_list);
408 ERROR ("ntpd plugin: Unable to connect to server.");
414 /* For a description of the arguments see `ntpd_do_query' below. */
415 static int ntpd_receive_response (int *res_items, int *res_size,
416 char **res_data, int res_item_size)
419 struct pollfd poll_s;
428 struct timeval time_end;
429 struct timeval time_now;
432 int pkt_item_num; /* items in this packet */
433 int pkt_item_len; /* size of the items in this packet */
435 char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
436 int pkt_recvd_num; /* number of packets that have been received */
437 int pkt_lastseq; /* the last sequence number */
438 ssize_t pkt_padding; /* Padding in this packet */
440 if ((sd = ntpd_connect ()) < 0)
446 memset (pkt_recvd, '\0', sizeof (pkt_recvd));
454 if (gettimeofday (&time_end, NULL) < 0)
457 ERROR ("ntpd plugin: gettimeofday failed: %s",
458 sstrerror (errno, errbuf, sizeof (errbuf)));
461 time_end.tv_sec++; /* wait for a most one second */
466 struct timeval time_left;
468 if (gettimeofday (&time_now, NULL) < 0)
471 ERROR ("ntpd plugin: gettimeofday failed: %s",
472 sstrerror (errno, errbuf, sizeof (errbuf)));
476 if (timeval_cmp (time_end, time_now, &time_left) <= 0)
479 timeout = 1000 * time_left.tv_sec
480 + ((time_left.tv_usec + 500) / 1000);
482 /* timeout reached */
487 poll_s.events = POLLIN | POLLPRI;
490 DEBUG ("Polling for %ims", timeout);
491 status = poll (&poll_s, 1, timeout);
493 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
499 ERROR ("ntpd plugin: poll failed: %s",
500 sstrerror (errno, errbuf, sizeof (errbuf)));
504 if (status == 0) /* timeout */
506 DEBUG ("timeout reached.");
510 memset ((void *) &res, '\0', sizeof (res));
511 status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
513 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
519 INFO ("recv(2) failed: %s",
520 sstrerror (errno, errbuf, sizeof (errbuf)));
521 DEBUG ("Closing socket #%i", sd);
523 sock_descr = sd = -1;
527 DEBUG ("recv'd %i bytes", status);
530 * Do some sanity checks first
532 if (status < RESP_HEADER_SIZE)
534 WARNING ("ntpd plugin: Short (%i bytes) packet received",
538 if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
540 NOTICE ("ntpd plugin: Packet received with mode %i",
541 INFO_MODE (res.rm_vn_mode));
544 if (INFO_IS_AUTH (res.auth_seq))
546 NOTICE ("ntpd plugin: Encrypted packet received");
549 if (!ISRESPONSE (res.rm_vn_mode))
551 NOTICE ("ntpd plugin: Received request packet, "
555 if (INFO_MBZ (res.mbz_itemsize))
557 WARNING ("ntpd plugin: Received packet with nonzero "
561 if (res.implementation != IMPL_XNTPD)
563 WARNING ("ntpd plugin: Asked for request of type %i, "
564 "got %i", (int) IMPL_XNTPD, (int) res.implementation);
568 /* Check for error code */
569 if (INFO_ERR (res.err_nitems) != 0)
571 ERROR ("ntpd plugin: Received error code %i",
572 (int) INFO_ERR(res.err_nitems));
573 return ((int) INFO_ERR (res.err_nitems));
576 /* extract number of items in this packet and the size of these items */
577 pkt_item_num = INFO_NITEMS (res.err_nitems);
578 pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
579 DEBUG ("pkt_item_num = %i; pkt_item_len = %i;",
580 pkt_item_num, pkt_item_len);
582 /* Check if the reported items fit in the packet */
583 if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
585 ERROR ("ntpd plugin: %i items * %i bytes > "
586 "%i bytes - %i bytes header",
587 (int) pkt_item_num, (int) pkt_item_len,
588 (int) status, (int) RESP_HEADER_SIZE);
592 if (pkt_item_len > res_item_size)
594 ERROR ("ntpd plugin: (pkt_item_len = %i) "
595 ">= (res_item_size = %i)",
596 pkt_item_len, res_item_size);
600 /* If this is the first packet (time wise, not sequence wise),
601 * set `res_size'. If it's not the first packet check if the
602 * items have the same size. Discard invalid packets. */
603 if (items_num == 0) /* first packet */
605 DEBUG ("*res_size = %i", pkt_item_len);
606 *res_size = pkt_item_len;
608 else if (*res_size != pkt_item_len)
610 DEBUG ("Error: *res_size = %i; pkt_item_len = %i;",
611 *res_size, pkt_item_len);
612 ERROR ("Item sizes differ.");
617 * Because the items in the packet may be smaller than the
618 * items requested, the following holds true:
620 assert ((*res_size == pkt_item_len)
621 && (pkt_item_len <= res_item_size));
623 /* Calculate the padding. No idea why there might be any padding.. */
625 if (pkt_item_len < res_item_size)
626 pkt_padding = res_item_size - pkt_item_len;
627 DEBUG ("res_item_size = %i; pkt_padding = %zi;",
628 res_item_size, pkt_padding);
630 /* Extract the sequence number */
631 pkt_sequence = INFO_SEQ (res.auth_seq);
632 if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
634 ERROR ("ntpd plugin: Received packet with sequence %i",
639 /* Check if this sequence has been received before. If so, discard it. */
640 if (pkt_recvd[pkt_sequence] != '\0')
642 NOTICE ("ntpd plugin: Sequence %i received twice",
647 /* If `pkt_lastseq != -1' another packet without `more bit' has
649 if (!ISMORE (res.rm_vn_mode))
651 if (pkt_lastseq != -1)
653 ERROR ("ntpd plugin: Two packets which both "
654 "claim to be the last one in the "
655 "sequence have been received.");
658 pkt_lastseq = pkt_sequence;
659 DEBUG ("Last sequence = %i;", pkt_lastseq);
663 * Enough with the checks. Copy the data now.
664 * We start by allocating some more memory.
666 DEBUG ("realloc (%p, %zu)", (void *) *res_data,
667 (items_num + pkt_item_num) * res_item_size);
668 items = realloc ((void *) *res_data,
669 (items_num + pkt_item_num) * res_item_size);
673 ERROR ("ntpd plugin: realloc failed.");
676 items_num += pkt_item_num;
679 for (i = 0; i < pkt_item_num; i++)
681 /* dst: There are already `*res_items' items with
682 * res_item_size bytes each in in `*res_data'. Set
683 * dst to the first byte after that. */
684 void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
685 /* src: We use `pkt_item_len' to calculate the offset
686 * from the beginning of the packet, because the
687 * items in the packet may be smaller than the
688 * items that were requested. We skip `i' such
690 void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
692 /* Set the padding to zeros */
693 if (pkt_padding != 0)
694 memset (dst, '\0', res_item_size);
695 memcpy (dst, src, (size_t) pkt_item_len);
697 /* Increment `*res_items' by one, so `dst' will end up
698 * one further in the next round. */
700 } /* for (pkt_item_num) */
702 pkt_recvd[pkt_sequence] = (char) 1;
705 if ((pkt_recvd_num - 1) == pkt_lastseq)
707 } /* while (done == 0) */
710 } /* int ntpd_receive_response */
712 /* For a description of the arguments see `ntpd_do_query' below. */
713 static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
720 assert (req_items >= 0);
721 assert (req_size >= 0);
723 if ((sd = ntpd_connect ()) < 0)
726 memset ((void *) &req, '\0', sizeof (req));
727 req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
728 req.auth_seq = AUTH_SEQ (0, 0);
729 req.implementation = IMPL_XNTPD;
730 req.request = (unsigned char) req_code;
732 req_data_len = (size_t) (req_items * req_size);
734 assert (((req_data != NULL) && (req_data_len > 0))
735 || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
737 req.err_nitems = ERR_NITEMS (0, req_items);
738 req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
740 if (req_data != NULL)
741 memcpy ((void *) req.data, (const void *) req_data, req_data_len);
743 DEBUG ("req_items = %i; req_size = %i; req_data = %p;",
744 req_items, req_size, (void *) req_data);
746 status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
749 DEBUG ("`swrite' failed. Closing socket #%i", sd);
751 sock_descr = sd = -1;
761 * req_code: Type of request packet
762 * req_items: Numver of items in the request
763 * req_size: Size of one item in the request
764 * req_data: Data of the request packet
765 * res_items: Pointer to where the number returned items will be stored.
766 * res_size: Pointer to where the size of one returned item will be stored.
767 * res_data: This is where a pointer to the (allocated) data will be stored.
768 * res_item_size: Size of one returned item. (used to calculate padding)
770 * returns: zero upon success, non-zero otherwise.
772 static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
773 int *res_items, int *res_size, char **res_data, int res_item_size)
777 status = ntpd_send_request (req_code, req_items, req_size, req_data);
781 status = ntpd_receive_response (res_items, res_size, res_data,
786 static double ntpd_read_fp (int32_t val_int)
790 val_int = ntohl (val_int);
791 val_double = ((double) val_int) / FP_FRAC;
796 static uint32_t ntpd_get_refclock_id (struct info_peer_summary const *peer_info)
798 uint32_t addr = ntohl (peer_info->srcadr);
799 uint32_t refclock_id = (addr >> 8) & 0x00FF;
801 return (refclock_id);
804 static int ntpd_get_name_from_address (char *buffer, size_t buffer_size,
805 struct info_peer_summary const *peer_info, _Bool do_reverse_lookup)
807 struct sockaddr_storage sa;
812 memset (&sa, 0, sizeof (sa));
814 if (peer_info->v6_flag)
816 struct sockaddr_in6 sa6;
818 assert (sizeof (sa) >= sizeof (sa6));
820 memset (&sa6, 0, sizeof (sa6));
821 sa6.sin6_family = AF_INET6;
822 sa6.sin6_port = htons (123);
823 memcpy (&sa6.sin6_addr, &peer_info->srcadr6,
824 sizeof (struct in6_addr));
825 sa_len = sizeof (sa6);
827 memcpy (&sa, &sa6, sizeof (sa6));
831 struct sockaddr_in sa4;
833 assert (sizeof (sa) >= sizeof (sa4));
835 memset (&sa4, 0, sizeof (sa4));
836 sa4.sin_family = AF_INET;
837 sa4.sin_port = htons (123);
838 memcpy (&sa4.sin_addr, &peer_info->srcadr,
839 sizeof (struct in_addr));
840 sa_len = sizeof (sa4);
842 memcpy (&sa, &sa4, sizeof (sa4));
845 if (!do_reverse_lookup)
846 flags |= NI_NUMERICHOST;
848 status = getnameinfo ((struct sockaddr const *) &sa, sa_len,
850 NULL, 0, /* No port name */
855 ERROR ("ntpd plugin: getnameinfo failed: %s",
856 (status == EAI_SYSTEM)
857 ? sstrerror (errno, errbuf, sizeof (errbuf))
858 : gai_strerror (status));
863 } /* ntpd_get_name_from_address */
865 static int ntpd_get_name_refclock (char *buffer, size_t buffer_size,
866 struct info_peer_summary const *peer_info)
868 uint32_t refclock_id = ntpd_get_refclock_id (peer_info);
869 uint32_t unit_id = ntohl (peer_info->srcadr) & 0x00FF;
871 if (refclock_id >= refclock_names_num)
872 return (ntpd_get_name_from_address (buffer, buffer_size,
874 /* do_reverse_lookup = */ 0));
877 ssnprintf (buffer, buffer_size, "%s-%"PRIu32,
878 refclock_names[refclock_id], unit_id);
880 sstrncpy (buffer, refclock_names[refclock_id], buffer_size);
883 } /* int ntpd_get_name_refclock */
885 static int ntpd_get_name (char *buffer, size_t buffer_size,
886 struct info_peer_summary const *peer_info)
888 uint32_t addr = ntohl (peer_info->srcadr);
890 if (!peer_info->v6_flag && ((addr & REFCLOCK_MASK) == REFCLOCK_ADDR))
891 return (ntpd_get_name_refclock (buffer, buffer_size,
894 return (ntpd_get_name_from_address (buffer, buffer_size,
895 peer_info, do_reverse_lookups));
896 } /* int ntpd_addr_to_name */
898 static int ntpd_read (void)
900 struct info_kernel *ik;
904 struct info_peer_summary *ps;
915 status = ntpd_do_query (REQ_GET_KERNEL,
916 0, 0, NULL, /* request data */
917 &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
918 sizeof (struct info_kernel));
921 ERROR ("ntpd plugin: ntpd_do_query (REQ_GET_KERNEL) failed with status %i", status);
924 else if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
926 ERROR ("ntpd plugin: ntpd_do_query returned unexpected data. "
927 "(ik = %p; ik_num = %i; ik_size = %i)",
928 (void *) ik, ik_num, ik_size);
932 /* kerninfo -> estimated error */
934 DEBUG ("info_kernel:\n"
935 " pll offset = %.8f\n"
936 " pll frequency = %.8f\n" /* drift compensation */
937 " est error = %.8f\n",
938 ntpd_read_fp (ik->offset),
939 ntpd_read_fp (ik->freq),
940 ntpd_read_fp (ik->esterror));
942 ntpd_submit ("frequency_offset", "loop", ntpd_read_fp (ik->freq));
943 ntpd_submit ("time_offset", "loop", ntpd_read_fp (ik->offset));
944 ntpd_submit ("time_offset", "error", ntpd_read_fp (ik->esterror));
949 status = ntpd_do_query (REQ_PEER_LIST_SUM,
950 0, 0, NULL, /* request data */
951 &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
952 sizeof (struct info_peer_summary));
955 ERROR ("ntpd plugin: ntpd_do_query (REQ_PEER_LIST_SUM) failed with status %i", status);
958 else if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
960 ERROR ("ntpd plugin: ntpd_do_query returned unexpected data. "
961 "(ps = %p; ps_num = %i; ps_size = %i)",
962 (void *) ps, ps_num, ps_size);
966 for (i = 0; i < ps_num; i++)
968 struct info_peer_summary *ptr;
971 char peername[NI_MAXHOST];
972 uint32_t refclock_id;
976 status = ntpd_get_name (peername, sizeof (peername), ptr);
979 ERROR ("ntpd plugin: Determining name of peer failed.");
983 refclock_id = ntpd_get_refclock_id (ptr);
985 /* Convert the `long floating point' offset value to double */
986 M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
996 " dispersion = %f\n",
1001 ntpd_read_fp (ptr->delay),
1002 ntohl (ptr->offset_int),
1003 ntohl (ptr->offset_frc),
1005 ntpd_read_fp (ptr->dispersion));
1007 if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
1008 ntpd_submit_reach ("time_offset", peername, ptr->reach,
1010 ntpd_submit_reach ("time_dispersion", peername, ptr->reach,
1011 ntpd_read_fp (ptr->dispersion));
1012 if (refclock_id == 0) /* not a reference clock */
1013 ntpd_submit_reach ("delay", peername, ptr->reach,
1014 ntpd_read_fp (ptr->delay));
1021 } /* int ntpd_read */
1023 void module_register (void)
1025 plugin_register_config ("ntpd", ntpd_config,
1026 config_keys, config_keys_num);
1027 plugin_register_read ("ntpd", ntpd_read);
1028 } /* void module_register */