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diff --git a/src/ntpd.c b/src/ntpd.c
--- /dev/null
+++ b/src/ntpd.c
@@ -0,0 +1,1029 @@
+/**
+ * collectd - src/ntpd.c
+ * Copyright (C) 2006-2012 Florian octo Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Florian octo Forster <octo at collectd.org>
+ **/
+
+#define _DEFAULT_SOURCE
+#define _BSD_SOURCE /* For NI_MAXHOST */
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+
+#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_POLL_H
+# include <poll.h>
+#endif
+
+static const char *config_keys[] =
+{
+ "Host",
+ "Port",
+ "ReverseLookups",
+ "IncludeUnitID"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static _Bool do_reverse_lookups = 1;
+
+/* This option only exists for backward compatibility. If it is false and two
+ * ntpd peers use the same refclock driver, the plugin will try to write
+ * simultaneous measurements from both to the same type instance. */
+static _Bool include_unit_id = 0;
+
+# define NTPD_DEFAULT_HOST "localhost"
+# define NTPD_DEFAULT_PORT "123"
+static int sock_descr = -1;
+static char *ntpd_host = NULL;
+static char ntpd_port[16];
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * The following definitions were copied from the NTPd distribution *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+#define MAXFILENAME 128
+#define MAXSEQ 127
+#define MODE_PRIVATE 7
+#define NTP_OLDVERSION ((uint8_t) 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) ((uint8_t)(((rm_vn_mode)>>3)&0x7))
+#define INFO_MODE(rm_vn_mode) ((rm_vn_mode)&0x7)
+
+#define RM_VN_MODE(resp, more, version) \
+ ((uint8_t)(((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) ((uint8_t)((((auth)!=0)?0x80:0)|((seq)&0x7f)))
+
+#define INFO_ERR(err_nitems) ((uint16_t)((ntohs(err_nitems)>>12)&0xf))
+#define INFO_NITEMS(err_nitems) ((uint16_t)(ntohs(err_nitems)&0xfff))
+#define ERR_NITEMS(err, nitems) (htons((uint16_t)((((uint16_t)(err)<<12)&0xf000)\
+ |((uint16_t)(nitems)&0xfff))))
+
+#define INFO_MBZ(mbz_itemsize) ((ntohs(mbz_itemsize)>>12)&0xf)
+#define INFO_ITEMSIZE(mbz_itemsize) ((uint16_t)(ntohs(mbz_itemsize)&0xfff))
+#define MBZ_ITEMSIZE(itemsize) (htons((uint16_t)(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" /* 44 */
+};
+static int refclock_names_num = STATIC_ARRAY_SIZE (refclock_names);
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * End of the copied stuff.. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+static int ntpd_config (const char *key, const 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)
+ {
+ int port = (int) (atof (value));
+ if ((port > 0) && (port <= 65535))
+ ssnprintf (ntpd_port, sizeof (ntpd_port),
+ "%i", port);
+ else
+ sstrncpy (ntpd_port, value, sizeof (ntpd_port));
+ }
+ else if (strcasecmp (key, "ReverseLookups") == 0)
+ {
+ if (IS_TRUE (value))
+ do_reverse_lookups = 1;
+ else
+ do_reverse_lookups = 0;
+ }
+ else if (strcasecmp (key, "IncludeUnitID") == 0)
+ {
+ if (IS_TRUE (value))
+ include_unit_id = 1;
+ else
+ include_unit_id = 0;
+ }
+ else
+ {
+ return (-1);
+ }
+
+ return (0);
+}
+
+static void ntpd_submit (char *type, char *type_inst, double value)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+
+ values[0].gauge = value;
+
+ vl.values = values;
+ vl.values_len = 1;
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "ntpd", sizeof (vl.plugin));
+ sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
+ sstrncpy (vl.type, type, sizeof (vl.type));
+ sstrncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+}
+
+/* Each time a peer is polled, ntpd shifts the reach register to the left and
+ * sets the LSB based on whether the peer was reachable. If the LSB is zero,
+ * the values are out of date. */
+static void ntpd_submit_reach (char *type, char *type_inst, uint8_t reach,
+ double value)
+{
+ if (!(reach & 1))
+ value = NAN;
+
+ ntpd_submit (type, type_inst, value);
+}
+
+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);
+
+ DEBUG ("Opening a new socket");
+
+ host = ntpd_host;
+ if (host == NULL)
+ host = NTPD_DEFAULT_HOST;
+
+ port = ntpd_port;
+ if (strlen (port) == 0)
+ port = NTPD_DEFAULT_PORT;
+
+ memset (&ai_hints, '\0', sizeof (ai_hints));
+ ai_hints.ai_flags = 0;
+#ifdef AI_ADDRCONFIG
+ ai_hints.ai_flags |= AI_ADDRCONFIG;
+#endif
+ 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)
+ {
+ char errbuf[1024];
+ ERROR ("ntpd plugin: getaddrinfo (%s, %s): %s",
+ host, port,
+ (status == EAI_SYSTEM)
+ ? sstrerror (errno, errbuf, sizeof (errbuf))
+ : 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)
+ {
+ ERROR ("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 *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)
+ {
+ char errbuf[1024];
+ ERROR ("ntpd plugin: gettimeofday failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+ time_end.tv_sec++; /* wait for a most one second */
+
+ done = 0;
+ while (done == 0)
+ {
+ struct timeval time_left;
+
+ if (gettimeofday (&time_now, NULL) < 0)
+ {
+ char errbuf[1024];
+ ERROR ("ntpd plugin: gettimeofday failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+
+ if (timeval_cmp (time_end, time_now, &time_left) <= 0)
+ timeout = 0;
+ else
+ timeout = 1000 * time_left.tv_sec
+ + ((time_left.tv_usec + 500) / 1000);
+
+ /* timeout reached */
+ if (timeout <= 0)
+ break;
+
+ poll_s.fd = sd;
+ poll_s.events = POLLIN | POLLPRI;
+ poll_s.revents = 0;
+
+ DEBUG ("Polling for %ims", timeout);
+ status = poll (&poll_s, 1, timeout);
+
+ if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
+ continue;
+
+ if (status < 0)
+ {
+ char errbuf[1024];
+ ERROR ("ntpd plugin: poll failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+
+ if (status == 0) /* timeout */
+ {
+ DEBUG ("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)
+ {
+ char errbuf[1024];
+ INFO ("recv(2) failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ DEBUG ("Closing socket #%i", sd);
+ close (sd);
+ sock_descr = sd = -1;
+ return (-1);
+ }
+
+ DEBUG ("recv'd %i bytes", status);
+
+ /*
+ * Do some sanity checks first
+ */
+ if (status < RESP_HEADER_SIZE)
+ {
+ WARNING ("ntpd plugin: Short (%i bytes) packet received",
+ (int) status);
+ continue;
+ }
+ if (INFO_MODE (res.rm_vn_mode) != MODE_PRIVATE)
+ {
+ NOTICE ("ntpd plugin: Packet received with mode %i",
+ INFO_MODE (res.rm_vn_mode));
+ continue;
+ }
+ if (INFO_IS_AUTH (res.auth_seq))
+ {
+ NOTICE ("ntpd plugin: Encrypted packet received");
+ continue;
+ }
+ if (!ISRESPONSE (res.rm_vn_mode))
+ {
+ NOTICE ("ntpd plugin: Received request packet, "
+ "wanted response");
+ continue;
+ }
+ if (INFO_MBZ (res.mbz_itemsize))
+ {
+ WARNING ("ntpd plugin: Received packet with nonzero "
+ "MBZ field!");
+ continue;
+ }
+ if (res.implementation != IMPL_XNTPD)
+ {
+ 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)
+ {
+ ERROR ("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);
+ DEBUG ("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))
+ {
+ ERROR ("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 (pkt_item_len > res_item_size)
+ {
+ ERROR ("ntpd plugin: (pkt_item_len = %i) "
+ ">= (res_item_size = %i)",
+ pkt_item_len, res_item_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 */
+ {
+ DEBUG ("*res_size = %i", pkt_item_len);
+ *res_size = pkt_item_len;
+ }
+ else if (*res_size != pkt_item_len)
+ {
+ DEBUG ("Error: *res_size = %i; pkt_item_len = %i;",
+ *res_size, pkt_item_len);
+ ERROR ("Item sizes differ.");
+ continue;
+ }
+
+ /*
+ * Because the items in the packet may be smaller than the
+ * items requested, the following holds true:
+ */
+ assert ((*res_size == pkt_item_len)
+ && (pkt_item_len <= res_item_size));
+
+ /* Calculate the padding. No idea why there might be any padding.. */
+ pkt_padding = 0;
+ if (pkt_item_len < res_item_size)
+ pkt_padding = res_item_size - pkt_item_len;
+ DEBUG ("res_item_size = %i; pkt_padding = %zi;",
+ res_item_size, pkt_padding);
+
+ /* Extract the sequence number */
+ pkt_sequence = INFO_SEQ (res.auth_seq);
+ if ((pkt_sequence < 0) || (pkt_sequence > MAXSEQ))
+ {
+ ERROR ("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')
+ {
+ 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)
+ {
+ ERROR ("ntpd plugin: Two packets which both "
+ "claim to be the last one in the "
+ "sequence have been received.");
+ continue;
+ }
+ pkt_lastseq = pkt_sequence;
+ DEBUG ("Last sequence = %i;", pkt_lastseq);
+ }
+
+ /*
+ * Enough with the checks. Copy the data now.
+ * We start by allocating some more memory.
+ */
+ DEBUG ("realloc (%p, %zu)", (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;
+ ERROR ("ntpd plugin: realloc failed.");
+ continue;
+ }
+ items_num += pkt_item_num;
+ *res_data = items;
+
+ for (i = 0; i < pkt_item_num; i++)
+ {
+ /* dst: There are already `*res_items' items with
+ * res_item_size bytes each in in `*res_data'. Set
+ * dst to the first byte after that. */
+ void *dst = (void *) (*res_data + ((*res_items) * res_item_size));
+ /* src: We use `pkt_item_len' to calculate the offset
+ * from the beginning of the packet, because the
+ * items in the packet may be smaller than the
+ * items that were requested. We skip `i' such
+ * items. */
+ 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);
+
+ /* Increment `*res_items' by one, so `dst' will end up
+ * one further in the next round. */
+ (*res_items)++;
+ } /* for (pkt_item_num) */
+
+ pkt_recvd[pkt_sequence] = (char) 1;
+ pkt_recvd_num++;
+
+ if ((pkt_recvd_num - 1) == pkt_lastseq)
+ done = 1;
+ } /* while (done == 0) */
+
+ return (0);
+} /* int ntpd_receive_response */
+
+/* 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);
+
+ DEBUG ("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)
+ {
+ DEBUG ("`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 (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 uint32_t ntpd_get_refclock_id (struct info_peer_summary const *peer_info)
+{
+ uint32_t addr = ntohl (peer_info->srcadr);
+ uint32_t refclock_id = (addr >> 8) & 0x00FF;
+
+ return (refclock_id);
+}
+
+static int ntpd_get_name_from_address (char *buffer, size_t buffer_size,
+ struct info_peer_summary const *peer_info, _Bool do_reverse_lookup)
+{
+ struct sockaddr_storage sa;
+ socklen_t sa_len;
+ int flags = 0;
+ int status;
+
+ memset (&sa, 0, sizeof (sa));
+
+ if (peer_info->v6_flag)
+ {
+ struct sockaddr_in6 sa6;
+
+ assert (sizeof (sa) >= sizeof (sa6));
+
+ memset (&sa6, 0, sizeof (sa6));
+ sa6.sin6_family = AF_INET6;
+ sa6.sin6_port = htons (123);
+ memcpy (&sa6.sin6_addr, &peer_info->srcadr6,
+ sizeof (struct in6_addr));
+ sa_len = sizeof (sa6);
+
+ memcpy (&sa, &sa6, sizeof (sa6));
+ }
+ else
+ {
+ struct sockaddr_in sa4;
+
+ assert (sizeof (sa) >= sizeof (sa4));
+
+ memset (&sa4, 0, sizeof (sa4));
+ sa4.sin_family = AF_INET;
+ sa4.sin_port = htons (123);
+ memcpy (&sa4.sin_addr, &peer_info->srcadr,
+ sizeof (struct in_addr));
+ sa_len = sizeof (sa4);
+
+ memcpy (&sa, &sa4, sizeof (sa4));
+ }
+
+ if (!do_reverse_lookup)
+ flags |= NI_NUMERICHOST;
+
+ status = getnameinfo ((struct sockaddr const *) &sa, sa_len,
+ buffer, buffer_size,
+ NULL, 0, /* No port name */
+ flags);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("ntpd plugin: getnameinfo failed: %s",
+ (status == EAI_SYSTEM)
+ ? sstrerror (errno, errbuf, sizeof (errbuf))
+ : gai_strerror (status));
+ return (-1);
+ }
+
+ return (0);
+} /* ntpd_get_name_from_address */
+
+static int ntpd_get_name_refclock (char *buffer, size_t buffer_size,
+ struct info_peer_summary const *peer_info)
+{
+ uint32_t refclock_id = ntpd_get_refclock_id (peer_info);
+ uint32_t unit_id = ntohl (peer_info->srcadr) & 0x00FF;
+
+ if (refclock_id >= refclock_names_num)
+ return (ntpd_get_name_from_address (buffer, buffer_size,
+ peer_info,
+ /* do_reverse_lookup = */ 0));
+
+ if (include_unit_id)
+ ssnprintf (buffer, buffer_size, "%s-%"PRIu32,
+ refclock_names[refclock_id], unit_id);
+ else
+ sstrncpy (buffer, refclock_names[refclock_id], buffer_size);
+
+ return (0);
+} /* int ntpd_get_name_refclock */
+
+static int ntpd_get_name (char *buffer, size_t buffer_size,
+ struct info_peer_summary const *peer_info)
+{
+ uint32_t addr = ntohl (peer_info->srcadr);
+
+ if (!peer_info->v6_flag && ((addr & REFCLOCK_MASK) == REFCLOCK_ADDR))
+ return (ntpd_get_name_refclock (buffer, buffer_size,
+ peer_info));
+ else
+ return (ntpd_get_name_from_address (buffer, buffer_size,
+ peer_info, do_reverse_lookups));
+} /* int ntpd_addr_to_name */
+
+static int 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)
+ {
+ ERROR ("ntpd plugin: ntpd_do_query (REQ_GET_KERNEL) failed with status %i", status);
+ return (status);
+ }
+ else if ((ik == NULL) || (ik_num == 0) || (ik_size == 0))
+ {
+ ERROR ("ntpd plugin: ntpd_do_query returned unexpected data. "
+ "(ik = %p; ik_num = %i; ik_size = %i)",
+ (void *) ik, ik_num, ik_size);
+ return (-1);
+ }
+
+ /* kerninfo -> estimated error */
+
+ DEBUG ("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 ("frequency_offset", "loop", ntpd_read_fp (ik->freq));
+ ntpd_submit ("time_offset", "loop", ntpd_read_fp (ik->offset));
+ ntpd_submit ("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)
+ {
+ ERROR ("ntpd plugin: ntpd_do_query (REQ_PEER_LIST_SUM) failed with status %i", status);
+ return (status);
+ }
+ else if ((ps == NULL) || (ps_num == 0) || (ps_size == 0))
+ {
+ ERROR ("ntpd plugin: ntpd_do_query returned unexpected data. "
+ "(ps = %p; ps_num = %i; ps_size = %i)",
+ (void *) ps, ps_num, ps_size);
+ return (-1);
+ }
+
+ for (i = 0; i < ps_num; i++)
+ {
+ struct info_peer_summary *ptr;
+ double offset;
+
+ char peername[NI_MAXHOST];
+ uint32_t refclock_id;
+
+ ptr = ps + i;
+
+ status = ntpd_get_name (peername, sizeof (peername), ptr);
+ if (status != 0)
+ {
+ ERROR ("ntpd plugin: Determining name of peer failed.");
+ continue;
+ }
+
+ refclock_id = ntpd_get_refclock_id (ptr);
+
+ /* Convert the `long floating point' offset value to double */
+ M_LFPTOD (ntohl (ptr->offset_int), ntohl (ptr->offset_frc), offset);
+
+ DEBUG ("peer %i:\n"
+ " peername = %s\n"
+ " srcadr = 0x%08x\n"
+ " reach = 0%03o\n"
+ " delay = %f\n"
+ " offset_int = %i\n"
+ " offset_frc = %i\n"
+ " offset = %f\n"
+ " dispersion = %f\n",
+ i,
+ peername,
+ ntohl (ptr->srcadr),
+ ptr->reach,
+ 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_reach ("time_offset", peername, ptr->reach,
+ offset);
+ ntpd_submit_reach ("time_dispersion", peername, ptr->reach,
+ ntpd_read_fp (ptr->dispersion));
+ if (refclock_id == 0) /* not a reference clock */
+ ntpd_submit_reach ("delay", peername, ptr->reach,
+ ntpd_read_fp (ptr->delay));
+ }
+
+ free (ps);
+ ps = NULL;
+
+ return (0);
+} /* int ntpd_read */
+
+void module_register (void)
+{
+ plugin_register_config ("ntpd", ntpd_config,
+ config_keys, config_keys_num);
+ plugin_register_read ("ntpd", ntpd_read);
+} /* void module_register */