--- /dev/null
+/**
+ * collectd - src/ntpd.c
+ * Copyright (C) 2006 Florian octo Forster
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Florian octo Forster <octo at verplant.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+#include "utils_debug.h"
+
+#define MODULE_NAME "ntpd"
+
+#if HAVE_SYS_SOCKET_H
+# define NTPD_HAVE_READ 1
+#else
+# define NTPD_HAVE_READ 0
+#endif
+
+#if HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#if HAVE_NETDB_H
+# include <netdb.h>
+#endif
+#if HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#if HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#if HAVE_ARPA_INET_H
+# include <arpa/inet.h> /* inet_ntoa */
+#endif
+#if HAVE_NETINET_TCP_H
+# include <netinet/tcp.h>
+#endif
+#if HAVE_SYS_POLL_H
+# include <sys/poll.h>
+#endif
+
+static char *config_keys[] =
+{
+ "Host",
+ "Port",
+ NULL
+};
+static int config_keys_num = 2;
+
+/* drift */
+static char *time_offset_file = "ntpd/time_offset-%s.rrd";
+static char *time_dispersion_file = "ntpd/time_dispersion-%s.rrd";
+static char *time_delay_file = "ntpd/delay-%s.rrd";
+
+/* used for `time_offset', `time_dispersion', and `delay' */
+static char *sec_ds_def[] =
+{
+ "DS:seconds:GAUGE:"COLLECTD_HEARTBEAT":-1000000:1000000",
+ NULL
+};
+static int sec_ds_num = 1;
+
+static char *frequency_offset_file = "ntpd/frequency_offset-%s.rrd";
+static char *frequency_offset_ds_def[] =
+{
+ "DS:ppm:GAUGE:"COLLECTD_HEARTBEAT":-1000000:1000000",
+ NULL
+};
+static int frequency_offset_ds_num = 1;
+
+#if NTPD_HAVE_READ
+# define NTPD_DEFAULT_HOST "localhost"
+# define NTPD_DEFAULT_PORT "123"
+static int sock_descr = -1;
+static char *ntpd_host = NULL;
+static char *ntpd_port = NULL;
+#endif
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * The following definitions were copied from the NTPd distribution *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+#define MAXFILENAME 128
+#define MAXSEQ 127
+#define MODE_PRIVATE 7
+#define NTP_OLDVERSION ((u_char) 1) /* oldest credible version */
+#define IMPL_XNTPD 3
+#define FP_FRAC 65536.0
+
+#define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
+#define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
+
+/* This structure is missing the message authentication code, since collectd
+ * doesn't use it. */
+struct req_pkt
+{
+ uint8_t rm_vn_mode;
+ uint8_t auth_seq;
+ uint8_t implementation; /* implementation number */
+ uint8_t request; /* request number */
+ uint16_t err_nitems; /* error code/number of data items */
+ uint16_t mbz_itemsize; /* item size */
+ char data[MAXFILENAME + 48]; /* data area [32 prev](176 byte max) */
+ /* struct conf_peer must fit */
+};
+#define REQ_LEN_NOMAC (sizeof(struct req_pkt))
+
+/*
+ * A response packet. The length here is variable, this is a
+ * maximally sized one. Note that this implementation doesn't
+ * authenticate responses.
+ */
+#define RESP_HEADER_SIZE (8)
+#define RESP_DATA_SIZE (500)
+
+struct resp_pkt
+{
+ uint8_t rm_vn_mode; /* response, more, version, mode */
+ uint8_t auth_seq; /* key, sequence number */
+ uint8_t implementation; /* implementation number */
+ uint8_t request; /* request number */
+ uint16_t err_nitems; /* error code/number of data items */
+ uint16_t mbz_itemsize; /* item size */
+ char data[RESP_DATA_SIZE]; /* data area */
+};
+
+/*
+ * Bit setting macros for multifield items.
+ */
+#define RESP_BIT 0x80
+#define MORE_BIT 0x40
+
+#define ISRESPONSE(rm_vn_mode) (((rm_vn_mode)&RESP_BIT)!=0)
+#define ISMORE(rm_vn_mode) (((rm_vn_mode)&MORE_BIT)!=0)
+#define INFO_VERSION(rm_vn_mode) ((u_char)(((rm_vn_mode)>>3)&0x7))
+#define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
+
+#define RM_VN_MODE(resp, more, version) \
+ ((u_char)(((resp)?RESP_BIT:0)\
+ |((more)?MORE_BIT:0)\
+ |((version?version:(NTP_OLDVERSION+1))<<3)\
+ |(MODE_PRIVATE)))
+
+#define INFO_IS_AUTH(auth_seq) (((auth_seq) & 0x80) != 0)
+#define INFO_SEQ(auth_seq) ((auth_seq)&0x7f)
+#define AUTH_SEQ(auth, seq) ((u_char)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
+
+#define INFO_ERR(err_nitems) ((u_short)((ntohs(err_nitems)>>12)&0xf))
+#define INFO_NITEMS(err_nitems) ((u_short)(ntohs(err_nitems)&0xfff))
+#define ERR_NITEMS(err, nitems) (htons((u_short)((((u_short)(err)<<12)&0xf000)\
+ |((u_short)(nitems)&0xfff))))
+
+#define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
+#define INFO_ITEMSIZE(mbz_itemsize) ((u_short)(ntohs(mbz_itemsize)&0xfff))
+#define MBZ_ITEMSIZE(itemsize) (htons((u_short)(itemsize)))
+
+/* negate a long float type */
+#define M_NEG(v_i, v_f) \
+ do { \
+ if ((v_f) == 0) \
+ (v_i) = -((uint32_t)(v_i)); \
+ else { \
+ (v_f) = -((uint32_t)(v_f)); \
+ (v_i) = ~(v_i); \
+ } \
+ } while(0)
+/* l_fp to double */
+#define M_LFPTOD(r_i, r_uf, d) \
+ do { \
+ register int32_t i; \
+ register uint32_t f; \
+ \
+ i = (r_i); \
+ f = (r_uf); \
+ if (i < 0) { \
+ M_NEG(i, f); \
+ (d) = -((double) i + ((double) f) / 4294967296.0); \
+ } else { \
+ (d) = (double) i + ((double) f) / 4294967296.0; \
+ } \
+ } while (0)
+
+#define REQ_PEER_LIST_SUM 1
+struct info_peer_summary
+{
+ uint32_t dstadr; /* local address (zero for undetermined) */
+ uint32_t srcadr; /* source address */
+ uint16_t srcport; /* source port */
+ uint8_t stratum; /* stratum of peer */
+ int8_t hpoll; /* host polling interval */
+ int8_t ppoll; /* peer polling interval */
+ uint8_t reach; /* reachability register */
+ uint8_t flags; /* flags, from above */
+ uint8_t hmode; /* peer mode */
+ int32_t delay; /* peer.estdelay; s_fp */
+ int32_t offset_int; /* peer.estoffset; integral part */
+ int32_t offset_frc; /* peer.estoffset; fractional part */
+ uint32_t dispersion; /* peer.estdisp; u_fp */
+ uint32_t v6_flag; /* is this v6 or not */
+ uint32_t unused1; /* (unused) padding for dstadr6 */
+ struct in6_addr dstadr6; /* local address (v6) */
+ struct in6_addr srcadr6; /* source address (v6) */
+};
+
+#define REQ_SYS_INFO 4
+struct info_sys
+{
+ uint32_t peer; /* system peer address (v4) */
+ uint8_t peer_mode; /* mode we are syncing to peer in */
+ uint8_t leap; /* system leap bits */
+ uint8_t stratum; /* our stratum */
+ int8_t precision; /* local clock precision */
+ int32_t rootdelay; /* distance from sync source */
+ uint32_t rootdispersion; /* dispersion from sync source */
+ uint32_t refid; /* reference ID of sync source */
+ uint64_t reftime; /* system reference time */
+ uint32_t poll; /* system poll interval */
+ uint8_t flags; /* system flags */
+ uint8_t unused1; /* unused */
+ uint8_t unused2; /* unused */
+ uint8_t unused3; /* unused */
+ int32_t bdelay; /* default broadcast offset */
+ int32_t frequency; /* frequency residual (scaled ppm) */
+ uint64_t authdelay; /* default authentication delay */
+ uint32_t stability; /* clock stability (scaled ppm) */
+ int32_t v6_flag; /* is this v6 or not */
+ int32_t unused4; /* unused, padding for peer6 */
+ struct in6_addr peer6; /* system peer address (v6) */
+};
+
+#define REQ_GET_KERNEL 38
+struct info_kernel
+{
+ int32_t offset;
+ int32_t freq;
+ int32_t maxerror;
+ int32_t esterror;
+ uint16_t status;
+ uint16_t shift;
+ int32_t constant;
+ int32_t precision;
+ int32_t tolerance;
+ /* pps stuff */
+ int32_t ppsfreq;
+ int32_t jitter;
+ int32_t stabil;
+ int32_t jitcnt;
+ int32_t calcnt;
+ int32_t errcnt;
+ int32_t stbcnt;
+};
+
+/* List of reference clock names */
+static char *refclock_names[] =
+{
+ "UNKNOWN", "LOCAL", "GPS_TRAK", "WWV_PST", /* 0- 3 */
+ "SPECTRACOM", "TRUETIME", "IRIG_AUDIO", "CHU_AUDIO", /* 4- 7 */
+ "GENERIC", "GPS_MX4200", "GPS_AS2201", "GPS_ARBITER", /* 8-11 */
+ "IRIG_TPRO", "ATOM_LEITCH", "MSF_EES", "GPSTM_TRUE", /* 12-15 */
+ "GPS_BANC", "GPS_DATUM", "ACTS_NIST", "WWV_HEATH", /* 16-19 */
+ "GPS_NMEA", "GPS_VME", "PPS", "ACTS_PTB", /* 20-23 */
+ "ACTS_USNO", "TRUETIME", "GPS_HP", "MSF_ARCRON", /* 24-27 */
+ "SHM", "GPS_PALISADE", "GPS_ONCORE", "GPS_JUPITER", /* 28-31 */
+ "CHRONOLOG", "DUMBCLOCK", "ULINK_M320", "PCF", /* 32-35 */
+ "WWV_AUDIO", "GPS_FG", "HOPF_S", "HOPF_P", /* 36-39 */
+ "JJY", "TT_IRIG", "GPS_ZYFER", "GPS_RIPENCC", /* 40-43 */
+ "NEOCLK4X", NULL /* 44 */
+};
+static int refclock_names_num = 45;
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * End of the copied stuff.. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+static int ntpd_config (char *key, char *value)
+{
+ if (strcasecmp (key, "host") == 0)
+ {
+ if (ntpd_host != NULL)
+ free (ntpd_host);
+ if ((ntpd_host = strdup (value)) == NULL)
+ return (1);
+ }
+ else if (strcasecmp (key, "port") == 0)
+ {
+ if (ntpd_port != NULL)
+ free (ntpd_port);
+ if ((ntpd_port = strdup (value)) == NULL)
+ return (1);
+ }
+ else
+ {
+ return (-1);
+ }
+
+ return (0);
+}
+
+static void ntpd_init (void)
+{
+ return;
+}
+
+static void ntpd_write_sec (char *host, char *inst, char *val, char *file)
+{
+ char buf[256];
+ int status;
+
+ status = snprintf (buf, 256, file, inst);
+ if ((status < 1) || (status >= 256))
+ return;
+
+ rrd_update_file (host, buf, val,
+ sec_ds_def, sec_ds_num);
+}
+
+static void ntpd_write_time_offset (char *host, char *inst, char *val)
+{
+ ntpd_write_sec (host, inst, val, time_offset_file);
+}
+
+static void ntpd_write_time_dispersion (char *host, char *inst, char *val)
+{
+ ntpd_write_sec (host, inst, val, time_dispersion_file);
+}
+
+static void ntpd_write_delay (char *host, char *inst, char *val)
+{
+ ntpd_write_sec (host, inst, val, time_delay_file);
+}
+
+static void ntpd_write_frequency_offset (char *host, char *inst, char *val)
+{
+ char buf[256];
+ int status;
+
+ status = snprintf (buf, 256, frequency_offset_file, inst);
+ if ((status < 1) || (status >= 256))
+ return;
+
+ rrd_update_file (host, buf, val,
+ frequency_offset_ds_def, frequency_offset_ds_num);
+}
+
+#if NTPD_HAVE_READ
+static void ntpd_submit (char *type, char *inst, double value)
+{
+ char buf[256];
+
+ if (snprintf (buf, 256, "%u:%.8f", (unsigned int) curtime, value) >= 256)
+ return;
+
+ DBG ("type = %s; inst = %s; value = %s;",
+ type, inst, buf);
+
+ plugin_submit (type, inst, buf);
+}
+
+/* returns `tv0 - tv1' in milliseconds or 0 if `tv1 > tv0' */
+static int timeval_sub (const struct timeval *tv0, const struct timeval *tv1)
+{
+ int sec;
+ int usec;
+
+ if ((tv0->tv_sec < tv1->tv_sec)
+ || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
+ return (0);
+
+ sec = tv0->tv_sec - tv1->tv_sec;
+ usec = tv0->tv_usec - tv1->tv_usec;
+
+ while (usec < 0)
+ {
+ usec += 1000000;
+ sec -= 1;
+ }
+
+ if (sec < 0)
+ return (0);
+
+ return ((sec * 1000) + ((usec + 500) / 1000));
+}
+
+static int ntpd_connect (void)
+{
+ char *host;
+ char *port;
+
+ struct addrinfo ai_hints;
+ struct addrinfo *ai_list;
+ struct addrinfo *ai_ptr;
+ int status;
+
+ if (sock_descr >= 0)
+ return (sock_descr);
+
+ DBG ("Opening a new socket");
+
+ host = ntpd_host;
+ if (host == NULL)
+ host = NTPD_DEFAULT_HOST;
+
+ port = ntpd_port;
+ if (port == NULL)
+ port = NTPD_DEFAULT_PORT;
+
+ memset (&ai_hints, '\0', sizeof (ai_hints));
+ ai_hints.ai_flags = AI_ADDRCONFIG;
+ ai_hints.ai_family = PF_UNSPEC;
+ ai_hints.ai_socktype = SOCK_DGRAM;
+ ai_hints.ai_protocol = IPPROTO_UDP;
+
+ if ((status = getaddrinfo (host, port, &ai_hints, &ai_list)) != 0)
+ {
+ DBG ("getaddrinfo (%s, %s): %s",
+ host, port,
+ status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
+ syslog (LOG_ERR, "ntpd plugin: getaddrinfo (%s, %s): %s",
+ host, port,
+ status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
+ return (-1);
+ }
+
+ for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
+ {
+ /* create our socket descriptor */
+ if ((sock_descr = socket (ai_ptr->ai_family,
+ ai_ptr->ai_socktype,
+ ai_ptr->ai_protocol)) < 0)
+ continue;
+
+ /* connect to the ntpd */
+ if (connect (sock_descr, ai_ptr->ai_addr, ai_ptr->ai_addrlen))
+ {
+ close (sock_descr);
+ sock_descr = -1;
+ continue;
+ }
+
+ break;
+ }
+
+ freeaddrinfo (ai_list);
+
+ if (sock_descr < 0)
+ {
+ DBG ("Unable to connect to server.");
+ syslog (LOG_ERR, "ntpd plugin: Unable to connect to server.");
+ }
+
+ return (sock_descr);
+}
+
+/* For a description of the arguments see `ntpd_do_query' below. */
+static int ntpd_receive_response (int req_code, int *res_items, int *res_size,
+ char **res_data, int res_item_size)
+{
+ int sd;
+ struct pollfd poll_s;
+ struct resp_pkt res;
+ int status;
+ int done;
+ int i;
+
+ char *items;
+ size_t items_num;
+
+ struct timeval time_end;
+ struct timeval time_now;
+ int timeout;
+
+ int pkt_item_num; /* items in this packet */
+ int pkt_item_len; /* size of the items in this packet */
+ int pkt_sequence;
+ char pkt_recvd[MAXSEQ+1]; /* sequence numbers that have been received */
+ int pkt_recvd_num; /* number of packets that have been received */
+ int pkt_lastseq; /* the last sequence number */
+ ssize_t pkt_padding; /* Padding in this packet */
+
+ if ((sd = ntpd_connect ()) < 0)
+ return (-1);
+
+ items = NULL;
+ items_num = 0;
+
+ memset (pkt_recvd, '\0', sizeof (pkt_recvd));
+ pkt_recvd_num = 0;
+ pkt_lastseq = -1;
+
+ *res_items = 0;
+ *res_size = 0;
+ *res_data = NULL;
+
+ if (gettimeofday (&time_end, NULL) < 0)
+ {
+ syslog (LOG_ERR, "ntpd plugin: gettimeofday failed: %s",
+ strerror (errno));
+ return (-1);
+ }
+ time_end.tv_sec++; /* wait for a most one second */
+
+ done = 0;
+ while (done == 0)
+ {
+ if (gettimeofday (&time_now, NULL) < 0)
+ {
+ syslog (LOG_ERR, "ntpd plugin: gettimeofday failed: %s",
+ strerror (errno));
+ return (-1);
+ }
+
+ /* timeout reached */
+ if ((timeout = timeval_sub (&time_end, &time_now)) == 0)
+ break;
+
+ poll_s.fd = sd;
+ poll_s.events = POLLIN | POLLPRI;
+ poll_s.revents = 0;
+
+ DBG ("Polling for %ims", timeout);
+ status = poll (&poll_s, 1, timeout);
+
+ if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
+ continue;
+
+ if (status < 0)
+ {
+ DBG ("poll failed: %s", strerror (errno));
+ syslog (LOG_ERR, "ntpd plugin: poll failed: %s",
+ strerror (errno));
+ return (-1);
+ }
+
+ if (status == 0) /* timeout */
+ {
+ DBG ("timeout reached.");
+ break;
+ }
+
+ memset ((void *) &res, '\0', sizeof (res));
+ status = recv (sd, (void *) &res, sizeof (res), 0 /* no flags */);
+
+ if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
+ continue;
+
+ if (status < 0)
+ {
+ DBG ("recv(2) failed: %s", strerror (errno));
+ DBG ("Closing socket #%i", sd);
+ close (sd);
+ sock_descr = sd = -1;
+ return (-1);
+ }
+
+ DBG ("recv'd %i bytes", status);
+
+ /*
+ * Do some sanity checks first
+ */
+ if (status < RESP_HEADER_SIZE)
+ {
+ syslog (LOG_WARNING, "ntpd plugin: Short (%i bytes) packet received",
+ (int) status);
+ continue;
+ }
+ if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
+ {
+ syslog (LOG_NOTICE, "ntpd plugin: Packet received with mode %i",
+ INFO_MODE (res.rm_vn_mode));
+ continue;
+ }
+ if (INFO_IS_AUTH (res.auth_seq))
+ {
+ syslog (LOG_NOTICE, "ntpd plugin: Encrypted packet received");
+ continue;
+ }
+ if (!ISRESPONSE (res.rm_vn_mode))
+ {
+ syslog (LOG_NOTICE, "ntpd plugin: Received request packet, "
+ "wanted response");
+ continue;
+ }
+ if (INFO_MBZ (res.mbz_itemsize))
+ {
+ syslog (LOG_WARNING, "ntpd plugin: Received packet with nonzero "
+ "MBZ field!");
+ continue;
+ }
+ if (res.implementation != IMPL_XNTPD)
+ {
+ syslog (LOG_WARNING, "ntpd plugin: Asked for request of type %i, "
+ "got %i", (int) IMPL_XNTPD, (int) res.implementation);
+ continue;
+ }
+
+ /* Check for error code */
+ if (INFO_ERR (res.err_nitems) != 0)
+ {
+ syslog (LOG_ERR, "ntpd plugin: Received error code %i",
+ (int) INFO_ERR(res.err_nitems));
+ return ((int) INFO_ERR (res.err_nitems));
+ }
+
+ /* extract number of items in this packet and the size of these items */
+ pkt_item_num = INFO_NITEMS (res.err_nitems);
+ pkt_item_len = INFO_ITEMSIZE (res.mbz_itemsize);
+ DBG ("pkt_item_num = %i; pkt_item_len = %i;",
+ pkt_item_num, pkt_item_len);
+
+ /* Check if the reported items fit in the packet */
+ if ((pkt_item_num * pkt_item_len) > (status - RESP_HEADER_SIZE))
+ {
+ syslog (LOG_ERR, "ntpd plugin: %i items * %i bytes > "
+ "%i bytes - %i bytes header",
+ (int) pkt_item_num, (int) pkt_item_len,
+ (int) status, (int) RESP_HEADER_SIZE);
+ continue;
+ }
+
+ /* If this is the first packet (time wise, not sequence wise),
+ * set `res_size'. If it's not the first packet check if the
+ * items have the same size. Discard invalid packets. */
+ if (items_num == 0) /* first packet */
+ {
+ DBG ("*res_size = %i", pkt_item_len);
+ *res_size = pkt_item_len;
+ }
+ else if (*res_size != pkt_item_len)
+ {
+ DBG ("Error: *res_size = %i; pkt_item_len = %i;",
+ *res_size, pkt_item_len);
+ syslog (LOG_ERR, "Item sizes differ.");
+ continue;
+ }
+
+ /* Calculate the padding. No idea why there might be any padding.. */
+ pkt_padding = 0;
+ if (res_item_size > pkt_item_len)
+ pkt_padding = res_item_size - pkt_item_len;
+ DBG ("res_item_size = %i; pkt_padding = %i;",
+ res_item_size, pkt_padding);
+
+ /* Extract the sequence number */
+ pkt_sequence = INFO_SEQ (res.auth_seq);
+ if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
+ {
+ syslog (LOG_ERR, "ntpd plugin: Received packet with sequence %i",
+ pkt_sequence);
+ continue;
+ }
+
+ /* Check if this sequence has been received before. If so, discard it. */
+ if (pkt_recvd[pkt_sequence] != '\0')
+ {
+ syslog (LOG_NOTICE, "ntpd plugin: Sequence %i received twice",
+ pkt_sequence);
+ continue;
+ }
+
+ /* If `pkt_lastseq != -1' another packet without `more bit' has
+ * been received. */
+ if (!ISMORE (res.rm_vn_mode))
+ {
+ if (pkt_lastseq != -1)
+ {
+ syslog (LOG_ERR, "ntpd plugin: Two packets which both "
+ "claim to be the last one in the "
+ "sequence have been received.");
+ continue;
+ }
+ pkt_lastseq = pkt_sequence;
+ DBG ("Last sequence = %i;", pkt_lastseq);
+ }
+
+ /*
+ * Enough with the checks. Copy the data now.
+ * We start by allocating some more memory.
+ */
+ DBG ("realloc (%p, %i)", (void *) *res_data,
+ (items_num + pkt_item_num) * res_item_size);
+ items = realloc ((void *) *res_data,
+ (items_num + pkt_item_num) * res_item_size);
+ if (items == NULL)
+ {
+ items = *res_data;
+ syslog (LOG_ERR, "ntpd plugin: realloc failed.");
+ continue;
+ }
+ *res_data = items;
+
+ for (i = 0; i < pkt_item_num; i++)
+ {
+ void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
+ void *src = (void *) (((char *) res.data) + (i * pkt_item_len));
+
+ /* Set the padding to zeros */
+ if (pkt_padding != 0)
+ memset (dst, '\0', res_item_size);
+ memcpy (dst, src, (size_t) pkt_item_len);
+
+ (*res_items)++;
+ }
+
+ pkt_recvd[pkt_sequence] = (char) 1;
+ pkt_recvd_num++;
+
+ if ((pkt_recvd_num - 1) == pkt_lastseq)
+ done = 1;
+ } /* while (done == 0) */
+
+ return (0);
+}
+
+/* For a description of the arguments see `ntpd_do_query' below. */
+static int ntpd_send_request (int req_code, int req_items, int req_size, char *req_data)
+{
+ int sd;
+ struct req_pkt req;
+ size_t req_data_len;
+ int status;
+
+ assert (req_items >= 0);
+ assert (req_size >= 0);
+
+ if ((sd = ntpd_connect ()) < 0)
+ return (-1);
+
+ memset ((void *) &req, '\0', sizeof (req));
+ req.rm_vn_mode = RM_VN_MODE(0, 0, 0);
+ req.auth_seq = AUTH_SEQ (0, 0);
+ req.implementation = IMPL_XNTPD;
+ req.request = (unsigned char) req_code;
+
+ req_data_len = (size_t) (req_items * req_size);
+
+ assert (((req_data != NULL) && (req_data_len > 0))
+ || ((req_data == NULL) && (req_items == 0) && (req_size == 0)));
+
+ req.err_nitems = ERR_NITEMS (0, req_items);
+ req.mbz_itemsize = MBZ_ITEMSIZE (req_size);
+
+ if (req_data != NULL)
+ memcpy ((void *) req.data, (const void *) req_data, req_data_len);
+
+ DBG ("req_items = %i; req_size = %i; req_data = %p;",
+ req_items, req_size, (void *) req_data);
+
+ status = swrite (sd, (const char *) &req, REQ_LEN_NOMAC);
+ if (status < 0)
+ {
+ DBG ("`swrite' failed. Closing socket #%i", sd);
+ close (sd);
+ sock_descr = sd = -1;
+ return (status);
+ }
+
+ return (0);
+}
+
+/*
+ * ntpd_do_query:
+ *
+ * req_code: Type of request packet
+ * req_items: Numver of items in the request
+ * req_size: Size of one item in the request
+ * req_data: Data of the request packet
+ * res_items: Pointer to where the number returned items will be stored.
+ * res_size: Pointer to where the size of one returned item will be stored.
+ * res_data: This is where a pointer to the (allocated) data will be stored.
+ * res_item_size: Size of one returned item. (used to calculate padding)
+ *
+ * returns: zero upon success, non-zero otherwise.
+ */
+static int ntpd_do_query (int req_code, int req_items, int req_size, char *req_data,
+ int *res_items, int *res_size, char **res_data, int res_item_size)
+{
+ int status;
+
+ status = ntpd_send_request (req_code, req_items, req_size, req_data);
+ if (status != 0)
+ return (status);
+
+ status = ntpd_receive_response (req_code, res_items, res_size, res_data,
+ res_item_size);
+ return (status);
+}
+
+static double ntpd_read_fp (int32_t val_int)
+{
+ double val_double;
+
+ val_int = ntohl (val_int);
+ val_double = ((double) val_int) / FP_FRAC;
+
+ return (val_double);
+}
+
+static void ntpd_read (void)
+{
+ struct info_kernel *ik;
+ int ik_num;
+ int ik_size;
+
+ struct info_peer_summary *ps;
+ int ps_num;
+ int ps_size;
+
+ int status;
+ int i;
+
+ ik = NULL;
+ ik_num = 0;
+ ik_size = 0;
+
+ status = ntpd_do_query (REQ_GET_KERNEL,
+ 0, 0, NULL, /* request data */
+ &ik_num, &ik_size, (char **) ((void *) &ik), /* response data */
+ sizeof (struct info_kernel));
+
+ if (status != 0)
+ {
+ DBG ("ntpd_do_query failed with status %i", status);
+ return;
+ }
+ if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
+ {
+ DBG ("ntpd_do_query returned: ik = %p; ik_num = %i; ik_size = %i;",
+ (void *) ik, ik_num, ik_size);
+ return;
+ }
+
+ /* kerninfo -> estimated error */
+
+ DBG ("info_kernel:\n"
+ " pll offset = %.8f\n"
+ " pll frequency = %.8f\n" /* drift compensation */
+ " est error = %.8f\n",
+ ntpd_read_fp (ik->offset),
+ ntpd_read_fp (ik->freq),
+ ntpd_read_fp (ik->esterror));
+
+ ntpd_submit ("ntpd_frequency_offset", "loop", ntpd_read_fp (ik->freq));
+ ntpd_submit ("ntpd_time_offset", "loop", ntpd_read_fp (ik->offset));
+ ntpd_submit ("ntpd_time_offset", "error", ntpd_read_fp (ik->esterror));
+
+ free (ik);
+ ik = NULL;
+
+ status = ntpd_do_query (REQ_PEER_LIST_SUM,
+ 0, 0, NULL, /* request data */
+ &ps_num, &ps_size, (char **) ((void *) &ps), /* response data */
+ sizeof (struct info_peer_summary));
+ if (status != 0)
+ {
+ DBG ("ntpd_do_query failed with status %i", status);
+ return;
+ }
+ if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
+ {
+ DBG ("ntpd_do_query returned: ps = %p; ps_num = %i; ps_size = %i;",
+ (void *) ps, ps_num, ps_size);
+ return;
+ }
+
+ for (i = 0; i < ps_num; i++)
+ {
+ struct info_peer_summary *ptr;
+ double offset;
+
+ char peername[512];
+ int refclock_id;
+
+ ptr = ps + i;
+ refclock_id = 0;
+
+ /*
+ if (((ntohl (ptr->dstadr) & 0xFFFFFF00) == 0x7F000000) || (ptr->dstadr == 0))
+ continue;
+ */
+
+ /* Convert the `long floating point' offset value to double */
+ M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
+
+ if (ptr->v6_flag)
+ {
+ status = getnameinfo ((const struct sockaddr *) &ptr->srcadr6,
+ sizeof (ptr->srcadr6),
+ peername, sizeof (peername),
+ NULL, 0, 0 /* no flags */);
+ if (status != 0)
+ {
+ syslog (LOG_ERR, "ntpd plugin: getnameinfo failed: %s",
+ status == EAI_SYSTEM
+ ? strerror (errno)
+ : gai_strerror (status));
+ continue;
+ }
+ }
+ else if ((ntohl (ptr->srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR)
+ {
+ struct in_addr addr_obj;
+ char *addr_str;
+
+ refclock_id = (ntohl (ptr->srcadr) >> 8) & 0x000000FF;
+
+ if (refclock_id < refclock_names_num)
+ {
+ strncpy (peername, refclock_names[refclock_id],
+ sizeof (peername));
+ }
+ else
+ {
+ memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
+ addr_obj.s_addr = ptr->srcadr;
+ addr_str = inet_ntoa (addr_obj);
+
+ strncpy (peername, addr_str, sizeof (peername));
+ }
+ }
+ else /* IPv4 */
+ {
+ struct in_addr addr_obj;
+ struct hostent *addr_he;
+ char *addr_str;
+
+ memset ((void *) &addr_obj, '\0', sizeof (addr_obj));
+ addr_obj.s_addr = ptr->srcadr;
+ addr_str = inet_ntoa (addr_obj);
+
+ addr_he = gethostbyaddr ((const void *) &addr_obj,
+ sizeof (addr_obj), AF_INET);
+ if (addr_he != NULL)
+ {
+ strncpy (peername, addr_he->h_name, sizeof (peername));
+ }
+ else
+ {
+ strncpy (peername, addr_str, sizeof (peername));
+ }
+ }
+
+ DBG ("peer %i:\n"
+ " peername = %s\n"
+ " srcadr = 0x%08x\n"
+ " delay = %f\n"
+ " offset_int = %i\n"
+ " offset_frc = %i\n"
+ " offset = %f\n"
+ " dispersion = %f\n",
+ i,
+ peername,
+ ntohl (ptr->srcadr),
+ ntpd_read_fp (ptr->delay),
+ ntohl (ptr->offset_int),
+ ntohl (ptr->offset_frc),
+ offset,
+ ntpd_read_fp (ptr->dispersion));
+
+ if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
+ ntpd_submit ("ntpd_time_offset", peername, offset);
+ ntpd_submit ("ntpd_time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
+ if (refclock_id == 0) /* not a reference clock */
+ ntpd_submit ("ntpd_delay", peername, ntpd_read_fp (ptr->delay));
+ }
+
+ free (ps);
+ ps = NULL;
+
+ return;
+}
+#else
+# define ntpd_read NULL
+#endif /* NTPD_HAVE_READ */
+
+void module_register (void)
+{
+ plugin_register (MODULE_NAME, ntpd_init, ntpd_read, NULL);
+ plugin_register ("ntpd_time_offset", NULL, NULL, ntpd_write_time_offset);
+ plugin_register ("ntpd_time_dispersion", NULL, NULL, ntpd_write_time_dispersion);
+ plugin_register ("ntpd_delay", NULL, NULL, ntpd_write_delay);
+ plugin_register ("ntpd_frequency_offset", NULL, NULL, ntpd_write_frequency_offset);
+ cf_register (MODULE_NAME, ntpd_config, config_keys, config_keys_num);
+}
+
+#undef MODULE_NAME
projects / collectd.git / commitdiff