diff options
Diffstat (limited to 'plugins/check_ntp_peer.c')
| -rw-r--r-- | plugins/check_ntp_peer.c | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/plugins/check_ntp_peer.c b/plugins/check_ntp_peer.c new file mode 100644 index 0000000..49cb100 --- /dev/null +++ b/plugins/check_ntp_peer.c @@ -0,0 +1,756 @@ +/***************************************************************************** +* +* Monitoring check_ntp_peer plugin +* +* License: GPL +* Copyright (c) 2006 Sean Finney <seanius@seanius.net> +* Copyright (c) 2006-2008 Monitoring Plugins Development Team +* +* Description: +* +* This file contains the check_ntp_peer plugin +* +* This plugin checks an NTP server independent of any commandline +* programs or external libraries. +* +* Use this plugin to check the health of an NTP server. It supports +* checking the offset with the sync peer, the jitter and stratum. This +* plugin will not check the clock offset between the local host and NTP +* server; please use check_ntp_time for that purpose. +* +* +* 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 <http://www.gnu.org/licenses/>. +* +* +*****************************************************************************/ + +const char *progname = "check_ntp_peer"; +const char *copyright = "2006-2008"; +const char *email = "devel@monitoring-plugins.org"; + +#include "common.h" +#include "netutils.h" +#include "utils.h" + +static char *server_address=NULL; +static int port=123; +static int verbose=0; +static int quiet=0; +static short do_offset=0; +static char *owarn="60"; +static char *ocrit="120"; +static short do_stratum=0; +static char *swarn="-1:16"; +static char *scrit="-1:16"; +static short do_jitter=0; +static char *jwarn="-1:5000"; +static char *jcrit="-1:10000"; +static short do_truechimers=0; +static char *twarn="0:"; +static char *tcrit="0:"; +static int syncsource_found=0; +static int li_alarm=0; + +int process_arguments (int, char **); +thresholds *offset_thresholds = NULL; +thresholds *jitter_thresholds = NULL; +thresholds *stratum_thresholds = NULL; +thresholds *truechimer_thresholds = NULL; +void print_help (void); +void print_usage (void); + +/* max size of control message data */ +#define MAX_CM_SIZE 468 + +/* 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_TRUECHIMER 0x02 +#define PEER_INCLUDED 0x04 +#define PEER_SYNCSOURCE 0x06 + +/* 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); + +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_SYNCSOURCE){ + printf(" <-- current sync source"); + } else if(PEER_SEL(peer[i].status) >= PEER_INCLUDED){ + printf(" <-- current sync candidate"); + } else if(PEER_SEL(peer[i].status) >= PEER_TRUECHIMER){ + printf(" <-- outlyer, but truechimer"); + } + printf("\n"); + } + } +} + +void +setup_control_request(ntp_control_message *p, uint8_t opcode, uint16_t seq){ + memset(p, 0, sizeof(ntp_control_message)); + LI_SET(p->flags, 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 */ +} + +/* This function does all the actual work; roughly here's what it does + * beside setting the offset, jitter and stratum passed as argument: + * - offset can be negative, so if it cannot get the offset, offset_result + * is set to UNKNOWN, otherwise OK. + * - jitter and stratum are set to -1 if they cannot be retrieved so any + * positive value means a success retrieving the value. + * - status is set to WARNING if there's no sync.peer (otherwise OK) and is + * the return value of the function. + * status is pretty much useless as syncsource_found is a global variable + * used later in main to check is the server was synchronized. It works + * so I left it alone */ +int ntp_request(double *offset, int *offset_result, double *jitter, int *stratum, int *num_truechimers){ + int conn=-1, i, npeers=0, num_candidates=0; + double tmp_offset = 0; + int min_peer_sel=PEER_INCLUDED; + int peers_size=0, peer_offset=0; + int status; + ntp_assoc_status_pair *peers=NULL; + ntp_control_message req; + const char *getvar = "stratum,offset,jitter"; + char *data, *value, *nptr; + void *tmp; + + status = STATE_OK; + *offset_result = STATE_UNKNOWN; + *jitter = *stratum = -1; + *num_truechimers = 0; + + /* Long-winded explanation: + * Getting the sync peer offset, jitter and stratum 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 offset, jitter and stratum value from the data[] + * (it's ASCII) + */ + my_udp_connect(server_address, port, &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)); + + do { + /* Attempt to read the largest size packet possible */ + req.count=htons(MAX_CM_SIZE); + DBG(printf("receiving READSTAT response")) + if(read(conn, &req, SIZEOF_NTPCM(req)) == -1) + die(STATE_CRITICAL, "NTP CRITICAL: No response from NTP server\n"); + DBG(print_ntp_control_message(&req)); + /* discard obviously invalid packets */ + if (ntohs(req.count) > MAX_CM_SIZE) + die(STATE_CRITICAL, "NTP CRITICAL: Invalid packet received from NTP server\n"); + } while (!(req.op&OP_READSTAT && ntohs(req.seq) == 1)); + + if (LI(req.flags) == LI_ALARM) li_alarm = 1; + /* 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 latter case 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_TRUECHIMER){ + (*num_truechimers)++; + if(PEER_SEL(peers[i].status) >= PEER_INCLUDED){ + num_candidates++; + if(PEER_SEL(peers[i].status) >= PEER_SYNCSOURCE){ + syncsource_found=1; + 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_WARNING; + if(verbose) printf("warning: no synchronization source found\n"); + } + if(li_alarm){ + status = STATE_WARNING; + if(verbose) printf("warning: LI_ALARM bit is set\n"); + } + + + for (i = 0; i < npeers; i++){ + /* Only query this server if it is the current sync source */ + /* If there's no sync.peer, query all candidates and use the best one */ + if (PEER_SEL(peers[i].status) >= min_peer_sel){ + if(verbose) printf("Getting offset, jitter and stratum for peer %.2x\n", ntohs(peers[i].assoc)); + xasprintf(&data, ""); + do{ + setup_control_request(&req, OP_READVAR, 2); + req.assoc = peers[i].assoc; + /* Putting the wanted variable names in the request + * cause the server to provide _only_ the requested values. + * 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)); + + do { + req.count = htons(MAX_CM_SIZE); + DBG(printf("receiving READVAR response...\n")); + read(conn, &req, SIZEOF_NTPCM(req)); + DBG(print_ntp_control_message(&req)); + } while (!(req.op&OP_READVAR && ntohs(req.seq) == 2)); + + if(!(req.op&REM_ERROR)) + xasprintf(&data, "%s%s", data, req.data); + } while(req.op&REM_MORE); + + if(req.op&REM_ERROR) { + if(strstr(getvar, "jitter")) { + if(verbose) printf("The command failed. This is usually caused by servers refusing the 'jitter'\nvariable. Restarting with 'dispersion'...\n"); + getvar = "stratum,offset,dispersion"; + i--; + continue; + } else if(strlen(getvar)) { + if(verbose) printf("Server didn't like dispersion either; will retrieve everything\n"); + getvar = ""; + i--; + continue; + } + } + + if(verbose > 1) + printf("Server responded: >>>%s<<<\n", data); + + /* get the offset */ + if(verbose) + printf("parsing offset from peer %.2x: ", ntohs(peers[i].assoc)); + + value = np_extract_ntpvar(data, "offset"); + nptr=NULL; + /* Convert the value if we have one */ + if(value != NULL) + tmp_offset = strtod(value, &nptr) / 1000; + /* If value is null or no conversion was performed */ + if(value == NULL || value==nptr) { + if(verbose) printf("error: unable to read server offset response.\n"); + } else { + if(verbose) printf("%.10g\n", tmp_offset); + if(*offset_result == STATE_UNKNOWN || fabs(tmp_offset) < fabs(*offset)) { + *offset = tmp_offset; + *offset_result = STATE_OK; + } else { + /* Skip this one; move to the next */ + continue; + } + } + + if(do_jitter) { + /* get the jitter */ + if(verbose) { + printf("parsing %s from peer %.2x: ", strstr(getvar, "dispersion") != NULL ? "dispersion" : "jitter", ntohs(peers[i].assoc)); + } + value = np_extract_ntpvar(data, strstr(getvar, "dispersion") != NULL ? "dispersion" : "jitter"); + nptr=NULL; + /* Convert the value if we have one */ + if(value != NULL) + *jitter = strtod(value, &nptr); + /* If value is null or no conversion was performed */ + if(value == NULL || value==nptr) { + if(verbose) printf("error: unable to read server jitter/dispersion response.\n"); + *jitter = -1; + } else if(verbose) { + printf("%.10g\n", *jitter); + } + } + + if(do_stratum) { + /* get the stratum */ + if(verbose) { + printf("parsing stratum from peer %.2x: ", ntohs(peers[i].assoc)); + } + value = np_extract_ntpvar(data, "stratum"); + nptr=NULL; + /* Convert the value if we have one */ + if(value != NULL) + *stratum = strtol(value, &nptr, 10); + if(value == NULL || value==nptr) { + if(verbose) printf("error: unable to read server stratum response.\n"); + *stratum = -1; + } else { + if(verbose) printf("%i\n", *stratum); + } + } + } /* if (PEER_SEL(peers[i].status) >= min_peer_sel) */ + } /* for (i = 0; i < npeers; i++) */ + + close(conn); + if(peers!=NULL) free(peers); + + return status; +} + +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'}, + {"quiet", no_argument, 0, 'q'}, + {"warning", required_argument, 0, 'w'}, + {"critical", required_argument, 0, 'c'}, + {"swarn", required_argument, 0, 'W'}, + {"scrit", required_argument, 0, 'C'}, + {"jwarn", required_argument, 0, 'j'}, + {"jcrit", required_argument, 0, 'k'}, + {"twarn", required_argument, 0, 'm'}, + {"tcrit", required_argument, 0, 'n'}, + {"timeout", required_argument, 0, 't'}, + {"hostname", required_argument, 0, 'H'}, + {"port", required_argument, 0, 'p'}, + {0, 0, 0, 0} + }; + + + if (argc < 2) + usage ("\n"); + + while (1) { + c = getopt_long (argc, argv, "Vhv46qw:c:W:C:j:k:m:n:t:H:p:", 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 'q': + quiet = 1; + break; + case 'w': + do_offset=1; + owarn = optarg; + break; + case 'c': + do_offset=1; + ocrit = optarg; + break; + case 'W': + do_stratum=1; + swarn = optarg; + break; + case 'C': + do_stratum=1; + scrit = optarg; + break; + case 'j': + do_jitter=1; + jwarn = optarg; + break; + case 'k': + do_jitter=1; + jcrit = optarg; + break; + case 'm': + do_truechimers=1; + twarn = optarg; + break; + case 'n': + do_truechimers=1; + tcrit = optarg; + break; + case 'H': + if(is_host(optarg) == FALSE) + usage2(_("Invalid hostname/address"), optarg); + server_address = strdup(optarg); + break; + case 'p': + port=atoi(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, "", + do_jitter, jitter_thresholds->warning->end, + do_jitter, jitter_thresholds->critical->end, + TRUE, 0, FALSE, 0); +} + +char *perfd_stratum (int stratum) +{ + return perfdata ("stratum", stratum, "", + do_stratum, (int)stratum_thresholds->warning->end, + do_stratum, (int)stratum_thresholds->critical->end, + TRUE, 0, TRUE, 16); +} + +char *perfd_truechimers (int num_truechimers) +{ + return perfdata ("truechimers", num_truechimers, "", + do_truechimers, (int)truechimer_thresholds->warning->end, + do_truechimers, (int)truechimer_thresholds->critical->end, + TRUE, 0, FALSE, 0); +} + +int main(int argc, char *argv[]){ + int result, offset_result, stratum, num_truechimers, oresult, jresult, sresult, tresult; + double offset=0, jitter=0; + char *result_line, *perfdata_line; + + setlocale (LC_ALL, ""); + bindtextdomain (PACKAGE, LOCALEDIR); + textdomain (PACKAGE); + + /* 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); + set_thresholds(&stratum_thresholds, swarn, scrit); + set_thresholds(&truechimer_thresholds, twarn, tcrit); + + /* initialize alarm signal handling */ + signal (SIGALRM, socket_timeout_alarm_handler); + + /* set socket timeout */ + alarm (socket_timeout); + + /* This returns either OK or WARNING (See comment preceding ntp_request) */ + result = ntp_request(&offset, &offset_result, &jitter, &stratum, &num_truechimers); + + if(offset_result == STATE_UNKNOWN) { + /* if there's no sync peer (this overrides ntp_request output): */ + result = (quiet == 1 ? STATE_UNKNOWN : STATE_CRITICAL); + } else { + /* Be quiet if there's no candidates either */ + if (quiet == 1 && result == STATE_WARNING) + result = STATE_UNKNOWN; + result = max_state_alt(result, get_status(fabs(offset), offset_thresholds)); + } + oresult = result; + + if(do_truechimers) { + tresult = get_status(num_truechimers, truechimer_thresholds); + result = max_state_alt(result, tresult); + } + + if(do_stratum) { + sresult = get_status(stratum, stratum_thresholds); + result = max_state_alt(result, sresult); + } + + if(do_jitter) { + jresult = get_status(jitter, jitter_thresholds); + result = max_state_alt(result, jresult); + } + + 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(!syncsource_found) + xasprintf(&result_line, "%s %s,", result_line, _("Server not synchronized")); + else if(li_alarm) + xasprintf(&result_line, "%s %s,", result_line, _("Server has the LI_ALARM bit set")); + + if(offset_result == STATE_UNKNOWN){ + xasprintf(&result_line, "%s %s", result_line, _("Offset unknown")); + xasprintf(&perfdata_line, ""); + } else if (oresult == STATE_WARNING) { + xasprintf(&result_line, "%s %s %.10g secs (WARNING)", result_line, _("Offset"), offset); + } else if (oresult == STATE_CRITICAL) { + xasprintf(&result_line, "%s %s %.10g secs (CRITICAL)", result_line, _("Offset"), offset); + } else { + xasprintf(&result_line, "%s %s %.10g secs", result_line, _("Offset"), offset); + } + xasprintf(&perfdata_line, "%s", perfd_offset(offset)); + + if (do_jitter) { + if (jresult == STATE_WARNING) { + xasprintf(&result_line, "%s, jitter=%f (WARNING)", result_line, jitter); + } else if (jresult == STATE_CRITICAL) { + xasprintf(&result_line, "%s, jitter=%f (CRITICAL)", result_line, jitter); + } else { + xasprintf(&result_line, "%s, jitter=%f", result_line, jitter); + } + xasprintf(&perfdata_line, "%s %s", perfdata_line, perfd_jitter(jitter)); + } + if (do_stratum) { + if (sresult == STATE_WARNING) { + xasprintf(&result_line, "%s, stratum=%i (WARNING)", result_line, stratum); + } else if (sresult == STATE_CRITICAL) { + xasprintf(&result_line, "%s, stratum=%i (CRITICAL)", result_line, stratum); + } else { + xasprintf(&result_line, "%s, stratum=%i", result_line, stratum); + } + xasprintf(&perfdata_line, "%s %s", perfdata_line, perfd_stratum(stratum)); + } + if (do_truechimers) { + if (tresult == STATE_WARNING) { + xasprintf(&result_line, "%s, truechimers=%i (WARNING)", result_line, num_truechimers); + } else if (tresult == STATE_CRITICAL) { + xasprintf(&result_line, "%s, truechimers=%i (CRITICAL)", result_line, num_truechimers); + } else { + xasprintf(&result_line, "%s, truechimers=%i", result_line, num_truechimers); + } + xasprintf(&perfdata_line, "%s %s", perfdata_line, perfd_truechimers(num_truechimers)); + } + 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_IPv46); + printf (UT_HOST_PORT, 'p', "123"); + printf (" %s\n", "-q, --quiet"); + printf (" %s\n", _("Returns UNKNOWN instead of CRITICAL or WARNING if server isn't synchronized")); + 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", "-W, --swarn=THRESHOLD"); + printf (" %s\n", _("Warning threshold for stratum of server's synchronization peer")); + printf (" %s\n", "-C, --scrit=THRESHOLD"); + printf (" %s\n", _("Critical threshold for stratum of server's synchronization peer")); + 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 (" %s\n", "-m, --twarn=THRESHOLD"); + printf (" %s\n", _("Warning threshold for number of usable time sources (\"truechimers\")")); + printf (" %s\n", "-n, --tcrit=THRESHOLD"); + printf (" %s\n", _("Critical threshold for number of usable time sources (\"truechimers\")")); + printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT); + printf (UT_VERBOSE); + + printf("\n"); + printf("%s\n", _("This plugin checks an NTP server independent of any commandline")); + printf("%s\n\n", _("programs or external libraries.")); + + printf("%s\n", _("Notes:")); + printf(" %s\n", _("Use this plugin to check the health of an NTP server. It supports")); + printf(" %s\n", _("checking the offset with the sync peer, the jitter and stratum. This")); + printf(" %s\n", _("plugin will not check the clock offset between the local host and NTP")); + printf(" %s\n", _("server; please use check_ntp_time for that purpose.")); + printf("\n"); + printf(UT_THRESHOLDS_NOTES); + + printf("\n"); + printf("%s\n", _("Examples:")); + printf(" %s\n", _("Simple NTP server check:")); + printf(" %s\n", ("./check_ntp_peer -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_peer -H ntpserv -w 0.5 -c 1 -j -1:100 -k -1:200")); + printf("\n"); + printf(" %s\n", _("Only check the number of usable time sources (\"truechimers\"):")); + printf(" %s\n", ("./check_ntp_peer -H ntpserv -m @5 -n @3")); + printf("\n"); + printf(" %s\n", _("Check only stratum:")); + printf(" %s\n", ("./check_ntp_peer -H ntpserv -W 4 -C 6")); + + printf (UT_SUPPORT); +} + +void +print_usage(void) +{ + printf ("%s\n", _("Usage:")); + printf(" %s -H <host> [-4|-6] [-w <warn>] [-c <crit>] [-W <warn>] [-C <crit>]\n", progname); + printf(" [-j <warn>] [-k <crit>] [-v verbose]\n"); +} |