1 /**
2 * collectd - src/ntpd.c
3 * Copyright (C) 2006 Florian octo Forster
4 *
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.
8 *
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.
13 *
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
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
25 #include "configfile.h"
26 #include "utils_debug.h"
28 #define MODULE_NAME "ntpd"
30 #if HAVE_SYS_SOCKET_H
31 # define NTPD_HAVE_READ 1
32 #else
33 # define NTPD_HAVE_READ 0
34 #endif
36 #if HAVE_STDINT_H
37 # include <stdint.h>
38 #endif
39 #if HAVE_NETDB_H
40 # include <netdb.h>
41 #endif
42 #if HAVE_SYS_SOCKET_H
43 # include <sys/socket.h>
44 #endif
45 #if HAVE_NETINET_IN_H
46 # include <netinet/in.h>
47 #endif
48 #if HAVE_ARPA_INET_H
49 # include <arpa/inet.h> /* inet_ntoa */
50 #endif
51 #if HAVE_NETINET_TCP_H
52 # include <netinet/tcp.h>
53 #endif
54 #if HAVE_SYS_POLL_H
55 # include <sys/poll.h>
56 #endif
58 static char *config_keys[] =
59 {
60 "Host",
61 "Port",
62 NULL
63 };
64 static int config_keys_num = 2;
66 /* drift */
67 static char *time_offset_file = "ntpd/time_offset-%s.rrd";
68 static char *time_dispersion_file = "ntpd/time_dispersion-%s.rrd";
69 static char *time_delay_file = "ntpd/delay-%s.rrd";
71 /* used for `time_offset', `time_dispersion', and `delay' */
72 static char *ms_ds_def[] =
73 {
74 "DS:ms:GAUGE:"COLLECTD_HEARTBEAT":-1000000:1000000",
75 NULL
76 };
77 static int ms_ds_num = 1;
79 static char *frequency_offset_file = "ntpd/frequency_offset-%s.rrd";
80 static char *frequency_offset_ds_def[] =
81 {
82 "DS:ppm:GAUGE:"COLLECTD_HEARTBEAT":-1000000:1000000",
83 NULL
84 };
85 static int frequency_offset_ds_num = 1;
87 #if NTPD_HAVE_READ
88 # define NTPD_DEFAULT_HOST "localhost"
89 # define NTPD_DEFAULT_PORT "123"
90 static int sock_descr = -1;
91 static char *ntpd_host = NULL;
92 static char *ntpd_port = NULL;
93 #endif
95 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
96 * The following definitions were copied from the NTPd distribution *
97 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
98 #define MAXFILENAME 128
99 #define MAXSEQ 127
100 #define MODE_PRIVATE 7
101 #define NTP_OLDVERSION ((u_char) 1) /* oldest credible version */
102 #define IMPL_XNTPD 3
103 #define FP_FRAC 65536.0
105 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
106 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
108 /* This structure is missing the message authentication code, since collectd
109 * doesn't use it. */
110 struct req_pkt
111 {
112 uint8_t rm_vn_mode;
113 uint8_t auth_seq;
114 uint8_t implementation; /* implementation number */
115 uint8_t request; /* request number */
116 uint16_t err_nitems; /* error code/number of data items */
117 uint16_t mbz_itemsize; /* item size */
118 char data[MAXFILENAME + 48]; /* data area [32 prev](176 byte max) */
119 /* struct conf_peer must fit */
120 };
121 #define REQ_LEN_NOMAC (sizeof(struct req_pkt))
123 /*
124 * A response packet. The length here is variable, this is a
125 * maximally sized one. Note that this implementation doesn't
126 * authenticate responses.
127 */
128 #define RESP_HEADER_SIZE (8)
129 #define RESP_DATA_SIZE (500)
131 struct resp_pkt
132 {
133 uint8_t rm_vn_mode; /* response, more, version, mode */
134 uint8_t auth_seq; /* key, sequence number */
135 uint8_t implementation; /* implementation number */
136 uint8_t request; /* request number */
137 uint16_t err_nitems; /* error code/number of data items */
138 uint16_t mbz_itemsize; /* item size */
139 char data[RESP_DATA_SIZE]; /* data area */
140 };
142 /*
143 * Bit setting macros for multifield items.
144 */
145 #define RESP_BIT 0x80
146 #define MORE_BIT 0x40
148 #define ISRESPONSE(rm_vn_mode) (((rm_vn_mode)&RESP_BIT)!=0)
149 #define ISMORE(rm_vn_mode) (((rm_vn_mode)&MORE_BIT)!=0)
150 #define INFO_VERSION(rm_vn_mode) ((u_char)(((rm_vn_mode)>>3)&0x7))
151 #define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
153 #define RM_VN_MODE(resp, more, version) \
154 ((u_char)(((resp)?RESP_BIT:0)\
155 |((more)?MORE_BIT:0)\
156 |((version?version:(NTP_OLDVERSION+1))<<3)\
157 |(MODE_PRIVATE)))
159 #define INFO_IS_AUTH(auth_seq) (((auth_seq) & 0x80) != 0)
160 #define INFO_SEQ(auth_seq) ((auth_seq)&0x7f)
161 #define AUTH_SEQ(auth, seq) ((u_char)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
163 #define INFO_ERR(err_nitems) ((u_short)((ntohs(err_nitems)>>12)&0xf))
164 #define INFO_NITEMS(err_nitems) ((u_short)(ntohs(err_nitems)&0xfff))
165 #define ERR_NITEMS(err, nitems) (htons((u_short)((((u_short)(err)<<12)&0xf000)\
166 |((u_short)(nitems)&0xfff))))
168 #define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
169 #define INFO_ITEMSIZE(mbz_itemsize) ((u_short)(ntohs(mbz_itemsize)&0xfff))
170 #define MBZ_ITEMSIZE(itemsize) (htons((u_short)(itemsize)))
172 /* negate a long float type */
173 #define M_NEG(v_i, v_f) \
174 do { \
175 if ((v_f) == 0) \
176 (v_i) = -((uint32_t)(v_i)); \
177 else { \
178 (v_f) = -((uint32_t)(v_f)); \
179 (v_i) = ~(v_i); \
180 } \
181 } while(0)
182 /* l_fp to double */
183 #define M_LFPTOD(r_i, r_uf, d) \
184 do { \
185 register int32_t i; \
186 register uint32_t f; \
187 \
188 i = (r_i); \
189 f = (r_uf); \
190 if (i < 0) { \
191 M_NEG(i, f); \
192 (d) = -((double) i + ((double) f) / 4294967296.0); \
193 } else { \
194 (d) = (double) i + ((double) f) / 4294967296.0; \
195 } \
196 } while (0)
198 #define REQ_PEER_LIST_SUM 1
199 struct info_peer_summary
200 {
201 uint32_t dstadr; /* local address (zero for undetermined) */
202 uint32_t srcadr; /* source address */
203 uint16_t srcport; /* source port */
204 uint8_t stratum; /* stratum of peer */
205 int8_t hpoll; /* host polling interval */
206 int8_t ppoll; /* peer polling interval */
207 uint8_t reach; /* reachability register */
208 uint8_t flags; /* flags, from above */
209 uint8_t hmode; /* peer mode */
210 int32_t delay; /* peer.estdelay; s_fp */
211 int32_t offset_int; /* peer.estoffset; integral part */
212 int32_t offset_frc; /* peer.estoffset; fractional part */
213 uint32_t dispersion; /* peer.estdisp; u_fp */
214 uint32_t v6_flag; /* is this v6 or not */
215 uint32_t unused1; /* (unused) padding for dstadr6 */
216 struct in6_addr dstadr6; /* local address (v6) */
217 struct in6_addr srcadr6; /* source address (v6) */
218 };
220 #define REQ_SYS_INFO 4
221 struct info_sys
222 {
223 uint32_t peer; /* system peer address (v4) */
224 uint8_t peer_mode; /* mode we are syncing to peer in */
225 uint8_t leap; /* system leap bits */
226 uint8_t stratum; /* our stratum */
227 int8_t precision; /* local clock precision */
228 int32_t rootdelay; /* distance from sync source */
229 uint32_t rootdispersion; /* dispersion from sync source */
230 uint32_t refid; /* reference ID of sync source */
231 uint64_t reftime; /* system reference time */
232 uint32_t poll; /* system poll interval */
233 uint8_t flags; /* system flags */
234 uint8_t unused1; /* unused */
235 uint8_t unused2; /* unused */
236 uint8_t unused3; /* unused */
237 int32_t bdelay; /* default broadcast offset */
238 int32_t frequency; /* frequency residual (scaled ppm) */
239 uint64_t authdelay; /* default authentication delay */
240 uint32_t stability; /* clock stability (scaled ppm) */
241 int32_t v6_flag; /* is this v6 or not */
242 int32_t unused4; /* unused, padding for peer6 */
243 struct in6_addr peer6; /* system peer address (v6) */
244 };
246 #define REQ_GET_KERNEL 38
247 struct info_kernel
248 {
249 int32_t offset;
250 int32_t freq;
251 int32_t maxerror;
252 int32_t esterror;
253 uint16_t status;
254 uint16_t shift;
255 int32_t constant;
256 int32_t precision;
257 int32_t tolerance;
258 /* pps stuff */
259 int32_t ppsfreq;
260 int32_t jitter;
261 int32_t stabil;
262 int32_t jitcnt;
263 int32_t calcnt;
264 int32_t errcnt;
265 int32_t stbcnt;
266 };
268 /* List of reference clock names */
269 static char *refclock_names[] =
270 {
271 "UNKNOWN", "LOCAL", "GPS_TRAK", "WWV_PST", /* 0- 3 */
272 "SPECTRACOM", "TRUETIME", "IRIG_AUDIO", "CHU_AUDIO", /* 4- 7 */
273 "GENERIC", "GPS_MX4200", "GPS_AS2201", "GPS_ARBITER", /* 8-11 */
274 "IRIG_TPRO", "ATOM_LEITCH", "MSF_EES", "GPSTM_TRUE", /* 12-15 */
275 "GPS_BANC", "GPS_DATUM", "ACTS_NIST", "WWV_HEATH", /* 16-19 */
276 "GPS_NMEA", "GPS_VME", "PPS", "ACTS_PTB", /* 20-23 */
277 "ACTS_USNO", "TRUETIME", "GPS_HP", "MSF_ARCRON", /* 24-27 */
278 "SHM", "GPS_PALISADE", "GPS_ONCORE", "GPS_JUPITER", /* 28-31 */
279 "CHRONOLOG", "DUMBCLOCK", "ULINK_M320", "PCF", /* 32-35 */
280 "WWV_AUDIO", "GPS_FG", "HOPF_S", "HOPF_P", /* 36-39 */
281 "JJY", "TT_IRIG", "GPS_ZYFER", "GPS_RIPENCC", /* 40-43 */
282 "NEOCLK4X", NULL /* 44 */
283 };
284 static int refclock_names_num = 45;
285 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
286 * End of the copied stuff.. *
287 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
289 static int ntpd_config (char *key, char *value)
290 {
291 if (strcasecmp (key, "host") == 0)
292 {
293 if (ntpd_host != NULL)
294 free (ntpd_host);
295 if ((ntpd_host = strdup (value)) == NULL)
296 return (1);
297 }
298 else if (strcasecmp (key, "port") == 0)
299 {
300 if (ntpd_port != NULL)
301 free (ntpd_port);
302 if ((ntpd_port = strdup (value)) == NULL)
303 return (1);
304 }
305 else
306 {
307 return (-1);
308 }
310 return (0);
311 }
313 static void ntpd_init (void)
314 {
315 return;
316 }
318 static void ntpd_write_ms (char *host, char *inst, char *val, char *file)
319 {
320 char buf[256];
321 int status;
323 status = snprintf (buf, 256, file, inst);
324 if ((status < 1) || (status >= 256))
325 return;
327 rrd_update_file (host, buf, val,
328 ms_ds_def, ms_ds_num);
329 }
331 static void ntpd_write_time_offset (char *host, char *inst, char *val)
332 {
333 ntpd_write_ms (host, inst, val, time_offset_file);
334 }
336 static void ntpd_write_time_dispersion (char *host, char *inst, char *val)
337 {
338 ntpd_write_ms (host, inst, val, time_dispersion_file);
339 }
341 static void ntpd_write_delay (char *host, char *inst, char *val)
342 {
343 ntpd_write_ms (host, inst, val, time_delay_file);
344 }
346 static void ntpd_write_frequency_offset (char *host, char *inst, char *val)
347 {
348 char buf[256];
349 int status;
351 status = snprintf (buf, 256, frequency_offset_file, inst);
352 if ((status < 1) || (status >= 256))
353 return;
355 rrd_update_file (host, buf, val,
356 frequency_offset_ds_def, frequency_offset_ds_num);
357 }
359 #if NTPD_HAVE_READ
360 static void ntpd_submit (char *type, char *inst, double value)
361 {
362 char buf[256];
364 if (snprintf (buf, 256, "%u:%.8f", (unsigned int) curtime, value) >= 256)
365 return;
367 DBG ("type = %s; inst = %s; value = %s;",
368 type, inst, buf);
370 plugin_submit (type, inst, buf);
371 }
373 /* returns `tv0 - tv1' in milliseconds or 0 if `tv1 > tv0' */
374 static int timeval_sub (const struct timeval *tv0, const struct timeval *tv1)
375 {
376 int sec;
377 int usec;
379 if ((tv0->tv_sec < tv1->tv_sec)
380 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
381 return (0);
383 sec = tv0->tv_sec - tv1->tv_sec;
384 usec = tv0->tv_usec - tv1->tv_usec;
386 while (usec < 0)
387 {
388 usec += 1000000;
389 sec -= 1;
390 }
392 if (sec < 0)
393 return (0);
395 return ((sec * 1000) + ((usec + 500) / 1000));
396 }
398 static int ntpd_connect (void)
399 {
400 char *host;
401 char *port;
403 struct addrinfo ai_hints;
404 struct addrinfo *ai_list;
405 struct addrinfo *ai_ptr;
406 int status;
408 if (sock_descr >= 0)
409 return (sock_descr);
411 DBG ("Opening a new socket");
413 host = ntpd_host;
414 if (host == NULL)
415 host = NTPD_DEFAULT_HOST;
417 port = ntpd_port;
418 if (port == NULL)
419 port = NTPD_DEFAULT_PORT;
421 memset (&ai_hints, '\0', sizeof (ai_hints));
422 ai_hints.ai_flags = AI_ADDRCONFIG;
423 ai_hints.ai_family = PF_UNSPEC;
424 ai_hints.ai_socktype = SOCK_DGRAM;
425 ai_hints.ai_protocol = IPPROTO_UDP;
427 if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
428 {
429 DBG ("getaddrinfo (%s, %s): %s",
430 host, port,
431 status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
432 syslog (LOG_ERR, "ntpd plugin: getaddrinfo (%s, %s): %s",
433 host, port,
434 status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
435 return (-1);
436 }
438 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
439 {
440 /* create our socket descriptor */
441 if ((sock_descr = socket (ai_ptr->ai_family,
442 ai_ptr->ai_socktype,
443 ai_ptr->ai_protocol)) < 0)
444 continue;
446 /* connect to the ntpd */
447 if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
448 {
449 close (sock_descr);
450 sock_descr = -1;
451 continue;
452 }
454 break;
455 }
457 freeaddrinfo (ai_list);
459 if (sock_descr < 0)
460 {
461 DBG ("Unable to connect to server.");
462 syslog (LOG_ERR, "ntpd plugin: Unable to connect to server.");
463 }
465 return (sock_descr);
466 }
468 /* For a description of the arguments see `ntpd_do_query' below. */
469 static int ntpd_receive_response (int req_code, int *res_items, int *res_size,
470 char **res_data, int res_item_size)
471 {
472 int sd;
473 struct pollfd poll_s;
474 struct resp_pkt res;
475 int status;
476 int done;
477 int i;
479 char *items;
480 size_t items_num;
482 struct timeval time_end;
483 struct timeval time_now;
484 int timeout;
486 int pkt_item_num; /* items in this packet */
487 int pkt_item_len; /* size of the items in this packet */
488 int pkt_sequence;
489 char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
490 int pkt_recvd_num; /* number of packets that have been received */
491 int pkt_lastseq; /* the last sequence number */
492 ssize_t pkt_padding; /* Padding in this packet */
494 if ((sd = ntpd_connect ()) < 0)
495 return (-1);
497 items = NULL;
498 items_num = 0;
500 memset (pkt_recvd, '\0', sizeof (pkt_recvd));
501 pkt_recvd_num = 0;
502 pkt_lastseq = -1;
504 *res_items = 0;
505 *res_size = 0;
506 *res_data = NULL;
508 if (gettimeofday (&time_end, NULL) < 0)
509 {
510 syslog (LOG_ERR, "ntpd plugin: gettimeofday failed: %s",
511 strerror (errno));
512 return (-1);
513 }
514 time_end.tv_sec++; /* wait for a most one second */
516 done = 0;
517 while (done == 0)
518 {
519 if (gettimeofday (&time_now, NULL) < 0)
520 {
521 syslog (LOG_ERR, "ntpd plugin: gettimeofday failed: %s",
522 strerror (errno));
523 return (-1);
524 }
526 /* timeout reached */
527 if ((timeout = timeval_sub (&time_end, &time_now)) == 0)
528 break;
530 poll_s.fd = sd;
531 poll_s.events = POLLIN | POLLPRI;
532 poll_s.revents = 0;
534 DBG ("Polling for %ims", timeout);
535 status = poll (&poll_s, 1, timeout);
537 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
538 continue;
540 if (status < 0)
541 {
542 DBG ("poll failed: %s", strerror (errno));
543 syslog (LOG_ERR, "ntpd plugin: poll failed: %s",
544 strerror (errno));
545 return (-1);
546 }
548 if (status == 0) /* timeout */
549 {
550 DBG ("timeout reached.");
551 break;
552 }
554 memset ((void *) &res, '\0', sizeof (res));
555 status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
557 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
558 continue;
560 if (status < 0)
561 {
562 DBG ("recv(2) failed: %s", strerror (errno));
563 DBG ("Closing socket #%i", sd);
564 close (sd);
565 sock_descr = sd = -1;
566 return (-1);
567 }
569 DBG ("recv'd %i bytes", status);
571 /*
572 * Do some sanity checks first
573 */
574 if (status < RESP_HEADER_SIZE)
575 {
576 syslog (LOG_WARNING, "ntpd plugin: Short (%i bytes) packet received",
577 (int) status);
578 continue;
579 }
580 if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
581 {
582 syslog (LOG_NOTICE, "ntpd plugin: Packet received with mode %i",
583 INFO_MODE (res.rm_vn_mode));
584 continue;
585 }
586 if (INFO_IS_AUTH (res.auth_seq))
587 {
588 syslog (LOG_NOTICE, "ntpd plugin: Encrypted packet received");
589 continue;
590 }
591 if (!ISRESPONSE (res.rm_vn_mode))
592 {
593 syslog (LOG_NOTICE, "ntpd plugin: Received request packet, "
594 "wanted response");
595 continue;
596 }
597 if (INFO_MBZ (res.mbz_itemsize))
598 {
599 syslog (LOG_WARNING, "ntpd plugin: Received packet with nonzero "
600 "MBZ field!");
601 continue;
602 }
603 if (res.implementation != IMPL_XNTPD)
604 {
605 syslog (LOG_WARNING, "ntpd plugin: Asked for request of type %i, "
606 "got %i", (int) IMPL_XNTPD, (int) res.implementation);
607 continue;
608 }
610 /* Check for error code */
611 if (INFO_ERR (res.err_nitems) != 0)
612 {
613 syslog (LOG_ERR, "ntpd plugin: Received error code %i",
614 (int) INFO_ERR(res.err_nitems));
615 return ((int) INFO_ERR (res.err_nitems));
616 }
618 /* extract number of items in this packet and the size of these items */
619 pkt_item_num = INFO_NITEMS (res.err_nitems);
620 pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
621 DBG ("pkt_item_num = %i; pkt_item_len = %i;",
622 pkt_item_num, pkt_item_len);
624 /* Check if the reported items fit in the packet */
625 if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
626 {
627 syslog (LOG_ERR, "ntpd plugin: %i items * %i bytes > "
628 "%i bytes - %i bytes header",
629 (int) pkt_item_num, (int) pkt_item_len,
630 (int) status, (int) RESP_HEADER_SIZE);
631 continue;
632 }
634 /* If this is the first packet (time wise, not sequence wise),
635 * set `res_size'. If it's not the first packet check if the
636 * items have the same size. Discard invalid packets. */
637 if (items_num == 0) /* first packet */
638 {
639 DBG ("*res_size = %i", pkt_item_len);
640 *res_size = pkt_item_len;
641 }
642 else if (*res_size != pkt_item_len)
643 {
644 DBG ("Error: *res_size = %i; pkt_item_len = %i;",
645 *res_size, pkt_item_len);
646 syslog (LOG_ERR, "Item sizes differ.");
647 continue;
648 }
650 /* Calculate the padding. No idea why there might be any padding.. */
651 pkt_padding = 0;
652 if (res_item_size > pkt_item_len)
653 pkt_padding = res_item_size - pkt_item_len;
654 DBG ("res_item_size = %i; pkt_padding = %i;",
655 res_item_size, pkt_padding);
657 /* Extract the sequence number */
658 pkt_sequence = INFO_SEQ (res.auth_seq);
659 if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
660 {
661 syslog (LOG_ERR, "ntpd plugin: Received packet with sequence %i",
662 pkt_sequence);
663 continue;
664 }
666 /* Check if this sequence has been received before. If so, discard it. */
667 if (pkt_recvd[pkt_sequence] != '\0')
668 {
669 syslog (LOG_NOTICE, "ntpd plugin: Sequence %i received twice",
670 pkt_sequence);
671 continue;
672 }
674 /* If `pkt_lastseq != -1' another packet without `more bit' has
675 * been received. */
676 if (!ISMORE (res.rm_vn_mode))
677 {
678 if (pkt_lastseq != -1)
679 {
680 syslog (LOG_ERR, "ntpd plugin: Two packets which both "
681 "claim to be the last one in the "
682 "sequence have been received.");
683 continue;
684 }
685 pkt_lastseq = pkt_sequence;
686 DBG ("Last sequence = %i;", pkt_lastseq);
687 }
689 /*
690 * Enough with the checks. Copy the data now.
691 * We start by allocating some more memory.
692 */
693 DBG ("realloc (%p, %i)", (void *) *res_data,
694 (items_num + pkt_item_num) * res_item_size);
695 items = realloc ((void *) *res_data,
696 (items_num + pkt_item_num) * res_item_size);
697 if (items == NULL)
698 {
699 items = *res_data;
700 syslog (LOG_ERR, "ntpd plugin: realloc failed.");
701 continue;
702 }
703 *res_data = items;
705 for (i = 0; i < pkt_item_num; i++)
706 {
707 void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
708 void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
710 /* Set the padding to zeros */
711 if (pkt_padding != 0)
712 memset (dst, '\0', res_item_size);
713 memcpy (dst, src, (size_t) pkt_item_len);
715 (*res_items)++;
716 }
718 pkt_recvd[pkt_sequence] = (char) 1;
719 pkt_recvd_num++;
721 if ((pkt_recvd_num - 1) == pkt_lastseq)
722 done = 1;
723 } /* while (done == 0) */
725 return (0);
726 }
728 /* For a description of the arguments see `ntpd_do_query' below. */
729 static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
730 {
731 int sd;
732 struct req_pkt req;
733 size_t req_data_len;
734 int status;
736 assert (req_items >= 0);
737 assert (req_size >= 0);
739 if ((sd = ntpd_connect ()) < 0)
740 return (-1);
742 memset ((void *) &req, '\0', sizeof (req));
743 req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
744 req.auth_seq = AUTH_SEQ (0, 0);
745 req.implementation = IMPL_XNTPD;
746 req.request = (unsigned char) req_code;
748 req_data_len = (size_t) (req_items * req_size);
750 assert (((req_data != NULL) && (req_data_len > 0))
751 || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
753 req.err_nitems = ERR_NITEMS (0, req_items);
754 req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
756 if (req_data != NULL)
757 memcpy ((void *) req.data, (const void *) req_data, req_data_len);
759 DBG ("req_items = %i; req_size = %i; req_data = %p;",
760 req_items, req_size, (void *) req_data);
762 status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
763 if (status < 0)
764 {
765 DBG ("`swrite' failed. Closing socket #%i", sd);
766 close (sd);
767 sock_descr = sd = -1;
768 return (status);
769 }
771 return (0);
772 }
774 /*
775 * ntpd_do_query:
776 *
777 * req_code: Type of request packet
778 * req_items: Numver of items in the request
779 * req_size: Size of one item in the request
780 * req_data: Data of the request packet
781 * res_items: Pointer to where the number returned items will be stored.
782 * res_size: Pointer to where the size of one returned item will be stored.
783 * res_data: This is where a pointer to the (allocated) data will be stored.
784 * res_item_size: Size of one returned item. (used to calculate padding)
785 *
786 * returns: zero upon success, non-zero otherwise.
787 */
788 static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
789 int *res_items, int *res_size, char **res_data, int res_item_size)
790 {
791 int status;
793 status = ntpd_send_request (req_code, req_items, req_size, req_data);
794 if (status != 0)
795 return (status);
797 status = ntpd_receive_response (req_code, res_items, res_size, res_data,
798 res_item_size);
799 return (status);
800 }
802 static double ntpd_read_fp (int32_t val_int)
803 {
804 double val_double;
806 val_int = ntohl (val_int);
807 val_double = ((double) val_int) / FP_FRAC;
809 return (val_double);
810 }
812 static void ntpd_read (void)
813 {
814 struct info_kernel *ik;
815 int ik_num;
816 int ik_size;
818 struct info_peer_summary *ps;
819 int ps_num;
820 int ps_size;
822 int status;
823 int i;
825 ik = NULL;
826 ik_num = 0;
827 ik_size = 0;
829 status = ntpd_do_query (REQ_GET_KERNEL,
830 0, 0, NULL, /* request data */
831 &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
832 sizeof (struct info_kernel));
834 if (status != 0)
835 {
836 DBG ("ntpd_do_query failed with status %i", status);
837 return;
838 }
839 if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
840 {
841 DBG ("ntpd_do_query returned: ik = %p; ik_num = %i; ik_size = %i;",
842 (void *) ik, ik_num, ik_size);
843 return;
844 }
846 /* kerninfo -> estimated error */
848 DBG ("info_kernel:\n"
849 " pll offset = %.8f\n"
850 " pll frequency = %.8f\n" /* drift compensation */
851 " est error = %.8f\n",
852 ntpd_read_fp (ik->offset),
853 ntpd_read_fp (ik->freq),
854 ntpd_read_fp (ik->esterror));
856 ntpd_submit ("ntpd_frequency_offset", "loop", ntpd_read_fp (ik->freq));
857 ntpd_submit ("ntpd_time_offset", "loop", ntpd_read_fp (ik->offset));
858 ntpd_submit ("ntpd_time_offset", "error", ntpd_read_fp (ik->esterror));
860 free (ik);
861 ik = NULL;
863 status = ntpd_do_query (REQ_PEER_LIST_SUM,
864 0, 0, NULL, /* request data */
865 &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
866 sizeof (struct info_peer_summary));
867 if (status != 0)
868 {
869 DBG ("ntpd_do_query failed with status %i", status);
870 return;
871 }
872 if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
873 {
874 DBG ("ntpd_do_query returned: ps = %p; ps_num = %i; ps_size = %i;",
875 (void *) ps, ps_num, ps_size);
876 return;
877 }
879 for (i = 0; i < ps_num; i++)
880 {
881 struct info_peer_summary *ptr;
882 double offset;
884 char peername[512];
885 int refclock_id;
887 ptr = ps + i;
888 refclock_id = 0;
890 /*
891 if (((ntohl (ptr->dstadr) & 0xFFFFFF00) == 0x7F000000) || (ptr->dstadr == 0))
892 continue;
893 */
895 /* Convert the `long floating point' offset value to double */
896 M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
898 if (ptr->v6_flag)
899 {
900 status = getnameinfo ((const struct sockaddr *) &ptr->srcadr6,
901 sizeof (ptr->srcadr6),
902 peername, sizeof (peername),
903 NULL, 0, 0 /* no flags */);
904 if (status != 0)
905 {
906 syslog (LOG_ERR, "ntpd plugin: getnameinfo failed: %s",
907 status == EAI_SYSTEM
908 ? strerror (errno)
909 : gai_strerror (status));
910 continue;
911 }
912 }
913 else if ((ntohl (ptr->srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR)
914 {
915 struct in_addr addr_obj;
916 char *addr_str;
918 refclock_id = (ntohl (ptr->srcadr) >> 8) & 0x000000FF;
920 if (refclock_id < refclock_names_num)
921 {
922 strncpy (peername, refclock_names[refclock_id],
923 sizeof (peername));
924 }
925 else
926 {
927 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
928 addr_obj.s_addr = ptr->srcadr;
929 addr_str = inet_ntoa (addr_obj);
931 strncpy (peername, addr_str, sizeof (peername));
932 }
933 }
934 else /* IPv4 */
935 {
936 struct in_addr addr_obj;
937 struct hostent *addr_he;
938 char *addr_str;
940 memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
941 addr_obj.s_addr = ptr->srcadr;
942 addr_str = inet_ntoa (addr_obj);
944 addr_he = gethostbyaddr ((const void *) &addr_obj,
945 sizeof (addr_obj), AF_INET);
946 if (addr_he != NULL)
947 {
948 strncpy (peername, addr_he->h_name, sizeof (peername));
949 }
950 else
951 {
952 strncpy (peername, addr_str, sizeof (peername));
953 }
954 }
956 DBG ("peer %i:\n"
957 " peername = %s\n"
958 " srcadr = 0x%08x\n"
959 " delay = %f\n"
960 " offset_int = %i\n"
961 " offset_frc = %i\n"
962 " offset = %f\n"
963 " dispersion = %f\n",
964 i,
965 peername,
966 ntohl (ptr->srcadr),
967 ntpd_read_fp (ptr->delay),
968 ntohl (ptr->offset_int),
969 ntohl (ptr->offset_frc),
970 offset,
971 ntpd_read_fp (ptr->dispersion));
973 if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
974 ntpd_submit ("ntpd_time_offset", peername, offset);
975 ntpd_submit ("ntpd_time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
976 if (refclock_id == 0) /* not a reference clock */
977 ntpd_submit ("ntpd_delay", peername, ntpd_read_fp (ptr->delay));
978 }
980 free (ps);
981 ps = NULL;
983 return;
984 }
985 #else
986 # define ntpd_read NULL
987 #endif /* NTPD_HAVE_READ */
989 void module_register (void)
990 {
991 plugin_register (MODULE_NAME, ntpd_init, ntpd_read, NULL);
992 plugin_register ("ntpd_time_offset", NULL, NULL, ntpd_write_time_offset);
993 plugin_register ("ntpd_time_dispersion", NULL, NULL, ntpd_write_time_dispersion);
994 plugin_register ("ntpd_delay", NULL, NULL, ntpd_write_delay);
995 plugin_register ("ntpd_frequency_offset", NULL, NULL, ntpd_write_frequency_offset);
996 cf_register (MODULE_NAME, ntpd_config, config_keys, config_keys_num);
997 }
999 #undef MODULE_NAME