From c735cf423417eee6de8624cd7032ebf8aeeef7ad Mon Sep 17 00:00:00 2001 From: Lorenz Kästle <12514511+RincewindsHat@users.noreply.github.com> Date: Thu, 4 Dec 2025 13:23:50 +0100 Subject: Remove check_ntp (#2194) check_ntp was marked as deprecated for forever (SVN times). In the spirit of cleaning up and removing the dead bodies, this commit removes check_ntp and all its connections. --- plugins/check_ntp.c | 947 ---------------------------------------------------- 1 file changed, 947 deletions(-) delete mode 100644 plugins/check_ntp.c (limited to 'plugins/check_ntp.c') diff --git a/plugins/check_ntp.c b/plugins/check_ntp.c deleted file mode 100644 index b22cc3c1..00000000 --- a/plugins/check_ntp.c +++ /dev/null @@ -1,947 +0,0 @@ -/***************************************************************************** - * - * Monitoring check_ntp plugin - * - * License: GPL - * Copyright (c) 2006 Sean Finney - * Copyright (c) 2006-2024 Monitoring Plugins Development Team - * - * Description: - * - * This file contains the check_ntp plugin - * - * This plugin to check ntp servers independent of any commandline - * programs or external libraries. - * - * - * 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, either version 3 of the License, or - * (at your option) any later version. - * - * 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, see . - * - * - *****************************************************************************/ - -const char *progname = "check_ntp"; -const char *copyright = "2006-2024"; -const char *email = "devel@monitoring-plugins.org"; - -#include "common.h" -#include "netutils.h" -#include "utils.h" - -static char *server_address = NULL; -static int verbose = 0; -static bool do_offset = false; -static char *owarn = "60"; -static char *ocrit = "120"; -static bool do_jitter = false; -static char *jwarn = "5000"; -static char *jcrit = "10000"; - -static int process_arguments(int /*argc*/, char ** /*argv*/); -static thresholds *offset_thresholds = NULL; -static thresholds *jitter_thresholds = NULL; -static void print_help(void); -void print_usage(void); - -/* number of times to perform each request to get a good average. */ -#ifndef AVG_NUM -# define AVG_NUM 4 -#endif - -/* max size of control message data */ -#define MAX_CM_SIZE 468 - -/* this structure holds everything in an ntp request/response as per rfc1305 */ -typedef struct { - uint8_t flags; /* byte with leapindicator,vers,mode. see macros */ - uint8_t stratum; /* clock stratum */ - int8_t poll; /* polling interval */ - int8_t precision; /* precision of the local clock */ - int32_t rtdelay; /* total rt delay, as a fixed point num. see macros */ - uint32_t rtdisp; /* like above, but for max err to primary src */ - uint32_t refid; /* ref clock identifier */ - uint64_t refts; /* reference timestamp. local time local clock */ - uint64_t origts; /* time at which request departed client */ - uint64_t rxts; /* time at which request arrived at server */ - uint64_t txts; /* time at which request departed server */ -} ntp_message; - -/* this structure holds data about results from querying offset from a peer */ -typedef struct { - time_t waiting; /* ts set when we started waiting for a response */ - int num_responses; /* number of successfully received responses */ - uint8_t stratum; /* copied verbatim from the ntp_message */ - double rtdelay; /* converted from the ntp_message */ - double rtdisp; /* converted from the ntp_message */ - double offset[AVG_NUM]; /* offsets from each response */ - uint8_t flags; /* byte with leapindicator,vers,mode. see macros */ -} ntp_server_results; - -/* this structure holds everything in an ntp control message as per rfc1305 */ -typedef struct { - uint8_t flags; /* byte with leapindicator,vers,mode. see macros */ - uint8_t op; /* R,E,M bits and Opcode */ - uint16_t seq; /* Packet sequence */ - uint16_t status; /* Clock status */ - uint16_t assoc; /* Association */ - uint16_t offset; /* Similar to TCP sequence # */ - uint16_t count; /* # bytes of data */ - char data[MAX_CM_SIZE]; /* ASCII data of the request */ - /* NB: not necessarily NULL terminated! */ -} ntp_control_message; - -/* this is an association/status-word pair found in control packet responses */ -typedef struct { - uint16_t assoc; - uint16_t status; -} ntp_assoc_status_pair; - -/* bits 1,2 are the leap indicator */ -#define LI_MASK 0xc0 -#define LI(x) ((x & LI_MASK) >> 6) -#define LI_SET(x, y) \ - do { \ - x |= ((y << 6) & LI_MASK); \ - } while (0) -/* and these are the values of the leap indicator */ -#define LI_NOWARNING 0x00 -#define LI_EXTRASEC 0x01 -#define LI_MISSINGSEC 0x02 -#define LI_ALARM 0x03 -/* bits 3,4,5 are the ntp version */ -#define VN_MASK 0x38 -#define VN(x) ((x & VN_MASK) >> 3) -#define VN_SET(x, y) \ - do { \ - x |= ((y << 3) & VN_MASK); \ - } while (0) -#define VN_RESERVED 0x02 -/* bits 6,7,8 are the ntp mode */ -#define MODE_MASK 0x07 -#define MODE(x) (x & MODE_MASK) -#define MODE_SET(x, y) \ - do { \ - x |= (y & MODE_MASK); \ - } while (0) -/* here are some values */ -#define MODE_CLIENT 0x03 -#define MODE_CONTROLMSG 0x06 -/* In control message, bits 8-10 are R,E,M bits */ -#define REM_MASK 0xe0 -#define REM_RESP 0x80 -#define REM_ERROR 0x40 -#define REM_MORE 0x20 -/* In control message, bits 11 - 15 are opcode */ -#define OP_MASK 0x1f -#define OP_SET(x, y) \ - do { \ - x |= (y & OP_MASK); \ - } while (0) -#define OP_READSTAT 0x01 -#define OP_READVAR 0x02 -/* In peer status bytes, bits 6,7,8 determine clock selection status */ -#define PEER_SEL(x) ((ntohs(x) >> 8) & 0x07) -#define PEER_INCLUDED 0x04 -#define PEER_SYNCSOURCE 0x06 - -/** - ** a note about the 32-bit "fixed point" numbers: - ** - they are divided into halves, each being a 16-bit int in network byte order: - - the first 16 bits are an int on the left side of a decimal point. - - the second 16 bits represent a fraction n/(2^16) - likewise for the 64-bit "fixed point" numbers with everything doubled :) - **/ - -/* macros to access the left/right 16 bits of a 32-bit ntp "fixed point" - number. note that these can be used as lvalues too */ -#define L16(x) (((uint16_t *)&x)[0]) -#define R16(x) (((uint16_t *)&x)[1]) -/* macros to access the left/right 32 bits of a 64-bit ntp "fixed point" - number. these too can be used as lvalues */ -#define L32(x) (((uint32_t *)&x)[0]) -#define R32(x) (((uint32_t *)&x)[1]) - -/* ntp wants seconds since 1/1/00, epoch is 1/1/70. this is the difference */ -#define EPOCHDIFF 0x83aa7e80UL - -/* extract a 32-bit ntp fixed point number into a double */ -#define NTP32asDOUBLE(x) (ntohs(L16(x)) + (double)ntohs(R16(x)) / 65536.0) - -/* likewise for a 64-bit ntp fp number */ -#define NTP64asDOUBLE(n) \ - (double)(((uint64_t)n) ? (ntohl(L32(n)) - EPOCHDIFF) + \ - (.00000001 * (0.5 + (double)(ntohl(R32(n)) / 42.94967296))) \ - : 0) - -/* convert a struct timeval to a double */ -#define TVasDOUBLE(x) (double)(x.tv_sec + (0.000001 * x.tv_usec)) - -/* convert an ntp 64-bit fp number to a struct timeval */ -#define NTP64toTV(n, t) \ - do { \ - if (!n) \ - t.tv_sec = t.tv_usec = 0; \ - else { \ - t.tv_sec = ntohl(L32(n)) - EPOCHDIFF; \ - t.tv_usec = (int)(0.5 + (double)(ntohl(R32(n)) / 4294.967296)); \ - } \ - } while (0) - -/* convert a struct timeval to an ntp 64-bit fp number */ -#define TVtoNTP64(t, n) \ - do { \ - if (!t.tv_usec && !t.tv_sec) \ - n = 0x0UL; \ - else { \ - L32(n) = htonl(t.tv_sec + EPOCHDIFF); \ - R32(n) = htonl((uint64_t)((4294.967296 * t.tv_usec) + .5)); \ - } \ - } while (0) - -/* NTP control message header is 12 bytes, plus any data in the data - * field, plus null padding to the nearest 32-bit boundary per rfc. - */ -#define SIZEOF_NTPCM(m) \ - (12 + ntohs(m.count) + ((ntohs(m.count) % 4) ? 4 - (ntohs(m.count) % 4) : 0)) - -/* finally, a little helper or two for debugging: */ -#define DBG(x) \ - do { \ - if (verbose > 1) { \ - x; \ - } \ - } while (0); -#define PRINTSOCKADDR(x) \ - do { \ - printf("%u.%u.%u.%u", (x >> 24) & 0xff, (x >> 16) & 0xff, (x >> 8) & 0xff, x & 0xff); \ - } while (0); - -/* calculate the offset of the local clock */ -static inline double calc_offset(const ntp_message *m, const struct timeval *t) { - double client_tx, peer_rx, peer_tx, client_rx; - client_tx = NTP64asDOUBLE(m->origts); - peer_rx = NTP64asDOUBLE(m->rxts); - peer_tx = NTP64asDOUBLE(m->txts); - client_rx = TVasDOUBLE((*t)); - return (.5 * ((peer_tx - client_rx) + (peer_rx - client_tx))); -} - -/* print out a ntp packet in human readable/debuggable format */ -void print_ntp_message(const ntp_message *p) { - struct timeval ref, orig, rx, tx; - - NTP64toTV(p->refts, ref); - NTP64toTV(p->origts, orig); - NTP64toTV(p->rxts, rx); - NTP64toTV(p->txts, tx); - - printf("packet contents:\n"); - printf("\tflags: 0x%.2x\n", p->flags); - printf("\t li=%d (0x%.2x)\n", LI(p->flags), p->flags & LI_MASK); - printf("\t vn=%d (0x%.2x)\n", VN(p->flags), p->flags & VN_MASK); - printf("\t mode=%d (0x%.2x)\n", MODE(p->flags), p->flags & MODE_MASK); - printf("\tstratum = %d\n", p->stratum); - printf("\tpoll = %g\n", pow(2, p->poll)); - printf("\tprecision = %g\n", pow(2, p->precision)); - printf("\trtdelay = %-.16g\n", NTP32asDOUBLE(p->rtdelay)); - printf("\trtdisp = %-.16g\n", NTP32asDOUBLE(p->rtdisp)); - printf("\trefid = %x\n", p->refid); - printf("\trefts = %-.16g\n", NTP64asDOUBLE(p->refts)); - printf("\torigts = %-.16g\n", NTP64asDOUBLE(p->origts)); - printf("\trxts = %-.16g\n", NTP64asDOUBLE(p->rxts)); - printf("\ttxts = %-.16g\n", NTP64asDOUBLE(p->txts)); -} - -void print_ntp_control_message(const ntp_control_message *p) { - int i = 0, numpeers = 0; - const ntp_assoc_status_pair *peer = NULL; - - printf("control packet contents:\n"); - printf("\tflags: 0x%.2x , 0x%.2x\n", p->flags, p->op); - printf("\t li=%d (0x%.2x)\n", LI(p->flags), p->flags & LI_MASK); - printf("\t vn=%d (0x%.2x)\n", VN(p->flags), p->flags & VN_MASK); - printf("\t mode=%d (0x%.2x)\n", MODE(p->flags), p->flags & MODE_MASK); - printf("\t response=%d (0x%.2x)\n", (p->op & REM_RESP) > 0, p->op & REM_RESP); - printf("\t more=%d (0x%.2x)\n", (p->op & REM_MORE) > 0, p->op & REM_MORE); - printf("\t error=%d (0x%.2x)\n", (p->op & REM_ERROR) > 0, p->op & REM_ERROR); - printf("\t op=%d (0x%.2x)\n", p->op & OP_MASK, p->op & OP_MASK); - printf("\tsequence: %d (0x%.2x)\n", ntohs(p->seq), ntohs(p->seq)); - printf("\tstatus: %d (0x%.2x)\n", ntohs(p->status), ntohs(p->status)); - printf("\tassoc: %d (0x%.2x)\n", ntohs(p->assoc), ntohs(p->assoc)); - printf("\toffset: %d (0x%.2x)\n", ntohs(p->offset), ntohs(p->offset)); - printf("\tcount: %d (0x%.2x)\n", ntohs(p->count), ntohs(p->count)); - numpeers = ntohs(p->count) / (sizeof(ntp_assoc_status_pair)); - if (p->op & REM_RESP && p->op & OP_READSTAT) { - peer = (ntp_assoc_status_pair *)p->data; - for (i = 0; i < numpeers; i++) { - printf("\tpeer id %.2x status %.2x", ntohs(peer[i].assoc), ntohs(peer[i].status)); - if (PEER_SEL(peer[i].status) >= PEER_INCLUDED) { - if (PEER_SEL(peer[i].status) >= PEER_SYNCSOURCE) { - printf(" <-- current sync source"); - } else { - printf(" <-- current sync candidate"); - } - } - printf("\n"); - } - } -} - -void setup_request(ntp_message *p) { - struct timeval t; - - memset(p, 0, sizeof(ntp_message)); - LI_SET(p->flags, LI_ALARM); - VN_SET(p->flags, 4); - MODE_SET(p->flags, MODE_CLIENT); - p->poll = 4; - p->precision = (int8_t)0xfa; - L16(p->rtdelay) = htons(1); - L16(p->rtdisp) = htons(1); - - gettimeofday(&t, NULL); - TVtoNTP64(t, p->txts); -} - -/* select the "best" server from a list of servers, and return its index. - * this is done by filtering servers based on stratum, dispersion, and - * finally round-trip delay. */ -int best_offset_server(const ntp_server_results *slist, int nservers) { - int cserver = 0, best_server = -1; - - /* for each server */ - for (cserver = 0; cserver < nservers; cserver++) { - /* We don't want any servers that fails these tests */ - /* Sort out servers that didn't respond or responede with a 0 stratum; - * stratum 0 is for reference clocks so no NTP server should ever report - * a stratum 0 */ - if (slist[cserver].stratum == 0) { - if (verbose) { - printf("discarding peer %d: stratum=%d\n", cserver, slist[cserver].stratum); - } - continue; - } - /* Sort out servers with error flags */ - if (LI(slist[cserver].flags) == LI_ALARM) { - if (verbose) { - printf("discarding peer %d: flags=%d\n", cserver, LI(slist[cserver].flags)); - } - continue; - } - - /* If we don't have a server yet, use the first one */ - if (best_server == -1) { - best_server = cserver; - DBG(printf("using peer %d as our first candidate\n", best_server)); - continue; - } - - /* compare the server to the best one we've seen so far */ - /* does it have an equal or better stratum? */ - DBG(printf("comparing peer %d with peer %d\n", cserver, best_server)); - if (slist[cserver].stratum <= slist[best_server].stratum) { - DBG(printf("stratum for peer %d <= peer %d\n", cserver, best_server)); - /* does it have an equal or better dispersion? */ - if (slist[cserver].rtdisp <= slist[best_server].rtdisp) { - DBG(printf("dispersion for peer %d <= peer %d\n", cserver, best_server)); - /* does it have a better rtdelay? */ - if (slist[cserver].rtdelay < slist[best_server].rtdelay) { - DBG(printf("rtdelay for peer %d < peer %d\n", cserver, best_server)); - best_server = cserver; - DBG(printf("peer %d is now our best candidate\n", best_server)); - } - } - } - } - - if (best_server >= 0) { - DBG(printf("best server selected: peer %d\n", best_server)); - return best_server; - } else { - DBG(printf("no peers meeting synchronization criteria :(\n")); - return -1; - } -} - -/* do everything we need to get the total average offset - * - we use a certain amount of parallelization with poll() to ensure - * we don't waste time sitting around waiting for single packets. - * - we also "manually" handle resolving host names and connecting, because - * we have to do it in a way that our lazy macros don't handle currently :( */ -double offset_request(const char *host, int *status) { - int i = 0, ga_result = 0, num_hosts = 0, *socklist = NULL, respnum = 0; - int servers_completed = 0, one_read = 0, servers_readable = 0, best_index = -1; - time_t now_time = 0, start_ts = 0; - ntp_message *req = NULL; - double avg_offset = 0.; - struct timeval recv_time; - struct addrinfo *ai = NULL, *ai_tmp = NULL, hints; - struct pollfd *ufds = NULL; - ntp_server_results *servers = NULL; - - /* setup hints to only return results from getaddrinfo that we'd like */ - memset(&hints, 0, sizeof(struct addrinfo)); - hints.ai_family = address_family; - hints.ai_protocol = IPPROTO_UDP; - hints.ai_socktype = SOCK_DGRAM; - - /* fill in ai with the list of hosts resolved by the host name */ - ga_result = getaddrinfo(host, "123", &hints, &ai); - if (ga_result != 0) { - die(STATE_UNKNOWN, "error getting address for %s: %s\n", host, gai_strerror(ga_result)); - } - - /* count the number of returned hosts, and allocate stuff accordingly */ - for (ai_tmp = ai; ai_tmp != NULL; ai_tmp = ai_tmp->ai_next) { - num_hosts++; - } - req = (ntp_message *)malloc(sizeof(ntp_message) * num_hosts); - if (req == NULL) { - die(STATE_UNKNOWN, "can not allocate ntp message array"); - } - socklist = (int *)malloc(sizeof(int) * num_hosts); - if (socklist == NULL) { - die(STATE_UNKNOWN, "can not allocate socket array"); - } - ufds = (struct pollfd *)malloc(sizeof(struct pollfd) * num_hosts); - if (ufds == NULL) { - die(STATE_UNKNOWN, "can not allocate socket array"); - } - servers = (ntp_server_results *)malloc(sizeof(ntp_server_results) * num_hosts); - if (servers == NULL) { - die(STATE_UNKNOWN, "can not allocate server array"); - } - memset(servers, 0, sizeof(ntp_server_results) * num_hosts); - DBG(printf("Found %d peers to check\n", num_hosts)); - - /* setup each socket for writing, and the corresponding struct pollfd */ - ai_tmp = ai; - for (i = 0; ai_tmp; i++) { - socklist[i] = socket(ai_tmp->ai_family, SOCK_DGRAM, IPPROTO_UDP); - if (socklist[i] == -1) { - perror(NULL); - die(STATE_UNKNOWN, "can not create new socket"); - } - if (connect(socklist[i], ai_tmp->ai_addr, ai_tmp->ai_addrlen)) { - /* don't die here, because it is enough if there is one server - answering in time. This also would break for dual ipv4/6 stacked - ntp servers when the client only supports on of them. - */ - DBG(printf("can't create socket connection on peer %i: %s\n", i, strerror(errno))); - } else { - ufds[i].fd = socklist[i]; - ufds[i].events = POLLIN; - ufds[i].revents = 0; - } - ai_tmp = ai_tmp->ai_next; - } - - /* now do AVG_NUM checks to each host. we stop before timeout/2 seconds - * have passed in order to ensure post-processing and jitter time. */ - now_time = start_ts = time(NULL); - while (servers_completed < num_hosts && now_time - start_ts <= socket_timeout / 2) { - /* loop through each server and find each one which hasn't - * been touched in the past second or so and is still lacking - * some responses. for each of these servers, send a new request, - * and update the "waiting" timestamp with the current time. */ - now_time = time(NULL); - - for (i = 0; i < num_hosts; i++) { - if (servers[i].waiting < now_time && servers[i].num_responses < AVG_NUM) { - if (verbose && servers[i].waiting != 0) { - printf("re-"); - } - if (verbose) { - printf("sending request to peer %d\n", i); - } - setup_request(&req[i]); - write(socklist[i], &req[i], sizeof(ntp_message)); - servers[i].waiting = now_time; - break; - } - } - - /* quickly poll for any sockets with pending data */ - servers_readable = poll(ufds, num_hosts, 100); - if (servers_readable == -1) { - perror("polling ntp sockets"); - die(STATE_UNKNOWN, "communication errors"); - } - - /* read from any sockets with pending data */ - for (i = 0; servers_readable && i < num_hosts; i++) { - if (ufds[i].revents & POLLIN && servers[i].num_responses < AVG_NUM) { - if (verbose) { - printf("response from peer %d: ", i); - } - - read(ufds[i].fd, &req[i], sizeof(ntp_message)); - gettimeofday(&recv_time, NULL); - DBG(print_ntp_message(&req[i])); - respnum = servers[i].num_responses++; - servers[i].offset[respnum] = calc_offset(&req[i], &recv_time); - if (verbose) { - printf("offset %.10g\n", servers[i].offset[respnum]); - } - servers[i].stratum = req[i].stratum; - servers[i].rtdisp = NTP32asDOUBLE(req[i].rtdisp); - servers[i].rtdelay = NTP32asDOUBLE(req[i].rtdelay); - servers[i].waiting = 0; - servers[i].flags = req[i].flags; - servers_readable--; - one_read = 1; - if (servers[i].num_responses == AVG_NUM) { - servers_completed++; - } - } - } - /* lather, rinse, repeat. */ - } - - if (one_read == 0) { - die(STATE_CRITICAL, "NTP CRITICAL: No response from NTP server\n"); - } - - /* now, pick the best server from the list */ - best_index = best_offset_server(servers, num_hosts); - if (best_index < 0) { - *status = STATE_UNKNOWN; - } else { - /* finally, calculate the average offset */ - for (i = 0; i < servers[best_index].num_responses; i++) { - avg_offset += servers[best_index].offset[i]; - } - avg_offset /= servers[best_index].num_responses; - } - - /* cleanup */ - /* FIXME: Not closing the socket to avoid reuse of the local port - * which can cause old NTP packets to be read instead of NTP control - * packets in jitter_request(). THERE MUST BE ANOTHER WAY... - * for(j=0; jflags, LI_NOWARNING); - VN_SET(p->flags, VN_RESERVED); - MODE_SET(p->flags, MODE_CONTROLMSG); - OP_SET(p->op, opcode); - p->seq = htons(seq); - /* Remaining fields are zero for requests */ -} - -/* XXX handle responses with the error bit set */ -double jitter_request(int *status) { - int conn = -1, i, npeers = 0, num_candidates = 0; - bool syncsource_found = false; - int run = 0, min_peer_sel = PEER_INCLUDED, num_selected = 0, num_valid = 0; - int peers_size = 0, peer_offset = 0; - ntp_assoc_status_pair *peers = NULL; - ntp_control_message req; - const char *getvar = "jitter"; - double rval = 0.0, jitter = -1.0; - char *startofvalue = NULL, *nptr = NULL; - void *tmp; - - /* Long-winded explanation: - * Getting the jitter requires a number of steps: - * 1) Send a READSTAT request. - * 2) Interpret the READSTAT reply - * a) The data section contains a list of peer identifiers (16 bits) - * and associated status words (16 bits) - * b) We want the value of 0x06 in the SEL (peer selection) value, - * which means "current synchronizatin source". If that's missing, - * we take anything better than 0x04 (see the rfc for details) but - * set a minimum of warning. - * 3) Send a READVAR request for information on each peer identified - * in 2b greater than the minimum selection value. - * 4) Extract the jitter value from the data[] (it's ASCII) - */ - my_udp_connect(server_address, 123, &conn); - - /* keep sending requests until the server stops setting the - * REM_MORE bit, though usually this is only 1 packet. */ - do { - setup_control_request(&req, OP_READSTAT, 1); - DBG(printf("sending READSTAT request")); - write(conn, &req, SIZEOF_NTPCM(req)); - DBG(print_ntp_control_message(&req)); - /* Attempt to read the largest size packet possible */ - req.count = htons(MAX_CM_SIZE); - DBG(printf("receiving READSTAT response")) - read(conn, &req, SIZEOF_NTPCM(req)); - DBG(print_ntp_control_message(&req)); - /* Each peer identifier is 4 bytes in the data section, which - * we represent as a ntp_assoc_status_pair datatype. - */ - peers_size += ntohs(req.count); - if ((tmp = realloc(peers, peers_size)) == NULL) { - free(peers), die(STATE_UNKNOWN, "can not (re)allocate 'peers' buffer\n"); - } - peers = tmp; - memcpy((void *)((ptrdiff_t)peers + peer_offset), (void *)req.data, ntohs(req.count)); - npeers = peers_size / sizeof(ntp_assoc_status_pair); - peer_offset += ntohs(req.count); - } while (req.op & REM_MORE); - - /* first, let's find out if we have a sync source, or if there are - * at least some candidates. in the case of the latter we'll issue - * a warning but go ahead with the check on them. */ - for (i = 0; i < npeers; i++) { - if (PEER_SEL(peers[i].status) >= PEER_INCLUDED) { - num_candidates++; - if (PEER_SEL(peers[i].status) >= PEER_SYNCSOURCE) { - syncsource_found = true; - min_peer_sel = PEER_SYNCSOURCE; - } - } - } - if (verbose) { - printf("%d candidate peers available\n", num_candidates); - } - if (verbose && syncsource_found) { - printf("synchronization source found\n"); - } - if (!syncsource_found) { - *status = STATE_UNKNOWN; - if (verbose) { - printf("warning: no synchronization source found\n"); - } - } - - for (run = 0; run < AVG_NUM; run++) { - if (verbose) { - printf("jitter run %d of %d\n", run + 1, AVG_NUM); - } - for (i = 0; i < npeers; i++) { - /* Only query this server if it is the current sync source */ - if (PEER_SEL(peers[i].status) >= min_peer_sel) { - char jitter_data[MAX_CM_SIZE + 1]; - size_t jitter_data_count; - - num_selected++; - setup_control_request(&req, OP_READVAR, 2); - req.assoc = peers[i].assoc; - /* By spec, putting the variable name "jitter" in the request - * should cause the server to provide _only_ the jitter value. - * thus reducing net traffic, guaranteeing us only a single - * datagram in reply, and making interpretation much simpler - */ - /* Older servers doesn't know what jitter is, so if we get an - * error on the first pass we redo it with "dispersion" */ - strncpy(req.data, getvar, MAX_CM_SIZE - 1); - req.count = htons(strlen(getvar)); - DBG(printf("sending READVAR request...\n")); - write(conn, &req, SIZEOF_NTPCM(req)); - DBG(print_ntp_control_message(&req)); - - req.count = htons(MAX_CM_SIZE); - DBG(printf("receiving READVAR response...\n")); - read(conn, &req, SIZEOF_NTPCM(req)); - DBG(print_ntp_control_message(&req)); - - if (req.op & REM_ERROR && strstr(getvar, "jitter")) { - if (verbose) { - printf("The 'jitter' command failed (old ntp server?)\nRestarting with " - "'dispersion'...\n"); - } - getvar = "dispersion"; - num_selected--; - i--; - continue; - } - - /* get to the float value */ - if (verbose) { - printf("parsing jitter from peer %.2x: ", ntohs(peers[i].assoc)); - } - if ((jitter_data_count = ntohs(req.count)) >= sizeof(jitter_data)) { - die(STATE_UNKNOWN, _("jitter response too large (%lu bytes)\n"), - (unsigned long)jitter_data_count); - } - memcpy(jitter_data, req.data, jitter_data_count); - jitter_data[jitter_data_count] = '\0'; - startofvalue = strchr(jitter_data, '='); - if (startofvalue != NULL) { - startofvalue++; - jitter = strtod(startofvalue, &nptr); - } - if (startofvalue == NULL || startofvalue == nptr) { - printf("warning: unable to read server jitter response.\n"); - *status = STATE_UNKNOWN; - } else { - if (verbose) { - printf("%g\n", jitter); - } - num_valid++; - rval += jitter; - } - } - } - if (verbose) { - printf("jitter parsed from %d/%d peers\n", num_valid, num_selected); - } - } - - rval = num_valid ? rval / num_valid : -1.0; - - close(conn); - if (peers != NULL) { - free(peers); - } - /* If we return -1.0, it means no synchronization source was found */ - return rval; -} - -int process_arguments(int argc, char **argv) { - int c; - int option = 0; - static struct option longopts[] = { - {"version", no_argument, 0, 'V'}, {"help", no_argument, 0, 'h'}, - {"verbose", no_argument, 0, 'v'}, {"use-ipv4", no_argument, 0, '4'}, - {"use-ipv6", no_argument, 0, '6'}, {"warning", required_argument, 0, 'w'}, - {"critical", required_argument, 0, 'c'}, {"jwarn", required_argument, 0, 'j'}, - {"jcrit", required_argument, 0, 'k'}, {"timeout", required_argument, 0, 't'}, - {"hostname", required_argument, 0, 'H'}, {0, 0, 0, 0}}; - - if (argc < 2) { - usage("\n"); - } - - while (1) { - c = getopt_long(argc, argv, "Vhv46w:c:j:k:t:H:", longopts, &option); - if (c == -1 || c == EOF || c == 1) { - break; - } - - switch (c) { - case 'h': - print_help(); - exit(STATE_UNKNOWN); - break; - case 'V': - print_revision(progname, NP_VERSION); - exit(STATE_UNKNOWN); - break; - case 'v': - verbose++; - break; - case 'w': - do_offset = true; - owarn = optarg; - break; - case 'c': - do_offset = true; - ocrit = optarg; - break; - case 'j': - do_jitter = true; - jwarn = optarg; - break; - case 'k': - do_jitter = true; - jcrit = optarg; - break; - case 'H': - if (!is_host(optarg)) { - usage2(_("Invalid hostname/address"), optarg); - } - server_address = strdup(optarg); - break; - case 't': - socket_timeout = atoi(optarg); - break; - case '4': - address_family = AF_INET; - break; - case '6': -#ifdef USE_IPV6 - address_family = AF_INET6; -#else - usage4(_("IPv6 support not available")); -#endif - break; - case '?': - /* print short usage statement if args not parsable */ - usage5(); - break; - } - } - - if (server_address == NULL) { - usage4(_("Hostname was not supplied")); - } - - return 0; -} - -char *perfd_offset(double offset) { - return fperfdata("offset", offset, "s", true, offset_thresholds->warning->end, true, - offset_thresholds->critical->end, false, 0, false, 0); -} - -char *perfd_jitter(double jitter) { - return fperfdata("jitter", jitter, "s", do_jitter, jitter_thresholds->warning->end, do_jitter, - jitter_thresholds->critical->end, true, 0, false, 0); -} - -int main(int argc, char *argv[]) { - int result, offset_result, jitter_result; - double offset = 0, jitter = 0; - char *result_line, *perfdata_line; - - setlocale(LC_ALL, ""); - bindtextdomain(PACKAGE, LOCALEDIR); - textdomain(PACKAGE); - - result = offset_result = jitter_result = STATE_OK; - - /* Parse extra opts if any */ - argv = np_extra_opts(&argc, argv, progname); - - if (process_arguments(argc, argv) == ERROR) { - usage4(_("Could not parse arguments")); - } - - set_thresholds(&offset_thresholds, owarn, ocrit); - set_thresholds(&jitter_thresholds, jwarn, jcrit); - - /* initialize alarm signal handling */ - signal(SIGALRM, socket_timeout_alarm_handler); - - /* set socket timeout */ - alarm(socket_timeout); - - offset = offset_request(server_address, &offset_result); - /* check_ntp used to always return CRITICAL if offset_result == STATE_UNKNOWN. - * Now we'll only do that is the offset thresholds were set */ - if (do_offset && offset_result == STATE_UNKNOWN) { - result = STATE_CRITICAL; - } else { - result = get_status(fabs(offset), offset_thresholds); - } - - /* If not told to check the jitter, we don't even send packets. - * jitter is checked using NTP control packets, which not all - * servers recognize. Trying to check the jitter on OpenNTPD - * (for example) will result in an error - */ - if (do_jitter) { - jitter = jitter_request(&jitter_result); - result = max_state_alt(result, get_status(jitter, jitter_thresholds)); - /* -1 indicates that we couldn't calculate the jitter - * Only overrides STATE_OK from the offset */ - if (jitter == -1.0 && result == STATE_OK) { - result = STATE_UNKNOWN; - } - } - result = max_state_alt(result, jitter_result); - - switch (result) { - case STATE_CRITICAL: - xasprintf(&result_line, _("NTP CRITICAL:")); - break; - case STATE_WARNING: - xasprintf(&result_line, _("NTP WARNING:")); - break; - case STATE_OK: - xasprintf(&result_line, _("NTP OK:")); - break; - default: - xasprintf(&result_line, _("NTP UNKNOWN:")); - break; - } - if (offset_result == STATE_UNKNOWN) { - xasprintf(&result_line, "%s %s", result_line, _("Offset unknown")); - xasprintf(&perfdata_line, ""); - } else { - xasprintf(&result_line, "%s %s %.10g secs", result_line, _("Offset"), offset); - xasprintf(&perfdata_line, "%s", perfd_offset(offset)); - } - if (do_jitter) { - xasprintf(&result_line, "%s, jitter=%f", result_line, jitter); - xasprintf(&perfdata_line, "%s %s", perfdata_line, perfd_jitter(jitter)); - } - printf("%s|%s\n", result_line, perfdata_line); - - if (server_address != NULL) { - free(server_address); - } - return result; -} - -void print_help(void) { - print_revision(progname, NP_VERSION); - - printf("Copyright (c) 2006 Sean Finney\n"); - printf(COPYRIGHT, copyright, email); - - printf("%s\n", _("This plugin checks the selected ntp server")); - - printf("\n\n"); - - print_usage(); - printf(UT_HELP_VRSN); - printf(UT_EXTRA_OPTS); - printf(UT_HOST_PORT, 'p', "123"); - printf(UT_IPv46); - printf(" %s\n", "-w, --warning=THRESHOLD"); - printf(" %s\n", _("Offset to result in warning status (seconds)")); - printf(" %s\n", "-c, --critical=THRESHOLD"); - printf(" %s\n", _("Offset to result in critical status (seconds)")); - printf(" %s\n", "-j, --jwarn=THRESHOLD"); - printf(" %s\n", _("Warning threshold for jitter")); - printf(" %s\n", "-k, --jcrit=THRESHOLD"); - printf(" %s\n", _("Critical threshold for jitter")); - printf(UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT); - printf(UT_VERBOSE); - - printf("\n"); - printf("%s\n", _("Notes:")); - printf(UT_THRESHOLDS_NOTES); - - printf("\n"); - printf("%s\n", _("Examples:")); - printf(" %s\n", _("Normal offset check:")); - printf(" %s\n", ("./check_ntp -H ntpserv -w 0.5 -c 1")); - printf("\n"); - printf(" %s\n", - _("Check jitter too, avoiding critical notifications if jitter isn't available")); - printf(" %s\n", _("(See Notes above for more details on thresholds formats):")); - printf(" %s\n", ("./check_ntp -H ntpserv -w 0.5 -c 1 -j -1:100 -k -1:200")); - - printf(UT_SUPPORT); - - printf("%s\n", _("WARNING: check_ntp is deprecated. Please use check_ntp_peer or")); - printf("%s\n\n", _("check_ntp_time instead.")); -} - -void print_usage(void) { - printf("%s\n", _("WARNING: check_ntp is deprecated. Please use check_ntp_peer or")); - printf("%s\n\n", _("check_ntp_time instead.")); - printf("%s\n", _("Usage:")); - printf(" %s -H [-w ] [-c ] [-j ] [-k ] [-4|-6] [-v verbose]\n", - progname); -} -- cgit v1.2.3-74-g34f1