From 97131650ea6bf9f16b775743e9931a91ea441887 Mon Sep 17 00:00:00 2001 From: Thomas Guyot-Sionnest Date: Fri, 23 Nov 2007 21:47:04 +0000 Subject: Rename check_ntp* and merge change in Trunk git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/branches/dermoth_ntp_rework@1832 f882894a-f735-0410-b71e-b25c423dba1c --- NEWS | 1 + plugins/Makefile.am | 12 +- plugins/check_ntp.c | 61 +---- plugins/check_ntp_peer.c | 618 +++++++++++++++++++++++++++++++++++++++++++++++ plugins/check_ntp_time.c | 615 ++++++++++++++++++++++++++++++++++++++++++++++ plugins/check_ntpd.c | 618 ----------------------------------------------- plugins/check_time_ntp.c | 615 ---------------------------------------------- plugins/t/check_ntp.t | 22 +- plugins/utils.c | 27 +++ plugins/utils.h | 1 + 10 files changed, 1289 insertions(+), 1301 deletions(-) create mode 100644 plugins/check_ntp_peer.c create mode 100644 plugins/check_ntp_time.c delete mode 100644 plugins/check_ntpd.c delete mode 100644 plugins/check_time_ntp.c diff --git a/NEWS b/NEWS index 99739a70..a0f3c560 100644 --- a/NEWS +++ b/NEWS @@ -9,6 +9,7 @@ This file documents the major additions and syntax changes between releases. and the offset is unavailable, will return UNKNOWN as well. NOTE: If jitter thresholds are specified integers it will return CRITICAL if jitter is "-1" as the default range starts at 0. See Examples in --help output. + YADDA YADDA YADDA... stratum thresholds support to check_ntp_peer (feature request #1703823) 1.4.10 28th September 2007 Fix check_http buffer overflow vulnerability when following HTTP redirects diff --git a/plugins/Makefile.am b/plugins/Makefile.am index 782721a5..eafcc5cd 100644 --- a/plugins/Makefile.am +++ b/plugins/Makefile.am @@ -14,8 +14,8 @@ MATHLIBS = @MATHLIBS@ #AM_CFLAGS = -Wall libexec_PROGRAMS = check_apt check_cluster check_disk check_dummy check_http check_load \ - check_mrtg check_mrtgtraf check_ntp check_ntpd check_nwstat check_overcr check_ping \ - check_real check_smtp check_ssh check_tcp check_time check_time_ntp \ + check_mrtg check_mrtgtraf check_ntp check_ntp_peer check_nwstat check_overcr check_ping \ + check_real check_smtp check_ssh check_tcp check_time check_ntp_time \ check_ups check_users negate \ urlize @EXTRAS@ @@ -70,7 +70,7 @@ check_mysql_query_LDADD = $(NETLIBS) $(MYSQLLIBS) check_nagios_LDADD = $(BASEOBJS) runcmd.o check_nt_LDADD = $(NETLIBS) check_ntp_LDADD = $(NETLIBS) $(MATHLIBS) -check_ntpd_LDADD = $(NETLIBS) $(MATHLIBS) +check_ntp_peer_LDADD = $(NETLIBS) $(MATHLIBS) check_nwstat_LDADD = $(NETLIBS) check_overcr_LDADD = $(NETLIBS) check_pgsql_LDADD = $(NETLIBS) $(PGLIBS) @@ -84,7 +84,7 @@ check_ssh_LDADD = $(NETLIBS) check_swap_LDADD = $(MATHLIBS) $(BASEOBJS) popen.o check_tcp_LDADD = $(SSLOBJS) $(NETLIBS) $(SSLLIBS) check_time_LDADD = $(NETLIBS) -check_time_ntp_LDADD = $(NETLIBS) $(MATHLIBS) +check_ntp_time_LDADD = $(NETLIBS) $(MATHLIBS) check_ups_LDADD = $(NETLIBS) check_users_LDADD = $(BASEOBJS) popen.o check_by_ssh_LDADD = $(NETLIBS) runcmd.o @@ -112,7 +112,7 @@ check_mysql_query_DEPENDENCIES = check_mysql_query.c $(NETOBJS) $(DEPLIBS) check_nagios_DEPENDENCIES = check_nagios.c $(BASEOBJS) runcmd.o $(DEPLIBS) check_nt_DEPENDENCIES = check_nt.c $(NETOBJS) $(DEPLIBS) check_ntp_DEPENDENCIES = check_ntp.c $(NETOBJS) $(DEPLIBS) -check_ntpd_DEPENDENCIES = check_ntpd.c $(NETOBJS) $(DEPLIBS) +check_ntp_peer_DEPENDENCIES = check_ntp_peer.c $(NETOBJS) $(DEPLIBS) check_nwstat_DEPENDENCIES = check_nwstat.c $(NETOBJS) $(DEPLIBS) check_overcr_DEPENDENCIES = check_overcr.c $(NETOBJS) $(DEPLIBS) check_pgsql_DEPENDENCIES = check_pgsql.c $(NETOBJS) $(DEPLIBS) @@ -126,7 +126,7 @@ check_ssh_DEPENDENCIES = check_ssh.c $(NETOBJS) $(DEPLIBS) check_swap_DEPENDENCIES = check_swap.c $(BASEOBJS) popen.o $(DEPLIBS) check_tcp_DEPENDENCIES = check_tcp.c $(SSLOBJS) $(NETOBJS) $(DEPLIBS) check_time_DEPENDENCIES = check_time.c $(NETOBJS) $(DEPLIBS) -check_time_ntp_DEPENDENCIES = check_time_ntp.c $(NETOBJS) $(DEPLIBS) +check_ntp_time_DEPENDENCIES = check_ntp_time.c $(NETOBJS) $(DEPLIBS) check_ups_DEPENDENCIES = check_ups.c $(NETOBJS) $(DEPLIBS) check_users_DEPENDENCIES = check_users.c $(BASEOBJS) popen.o $(DEPLIBS) check_by_ssh_DEPENDENCIES = check_by_ssh.c $(NETOBJS) runcmd.o $(DEPLIBS) diff --git a/plugins/check_ntp.c b/plugins/check_ntp.c index df6e02f8..38562ac9 100644 --- a/plugins/check_ntp.c +++ b/plugins/check_ntp.c @@ -50,9 +50,6 @@ static int verbose=0; static short do_offset=0; static char *owarn="60"; static char *ocrit="120"; -static short do_stratum=0; -static char *swarn="16"; -static char *scrit="16"; static short do_jitter=0; static char *jwarn="5000"; static char *jcrit="10000"; @@ -60,7 +57,6 @@ static char *jcrit="10000"; int process_arguments (int, char **); thresholds *offset_thresholds = NULL; thresholds *jitter_thresholds = NULL; -thresholds *stratum_thresholds = NULL; void print_help (void); void print_usage (void); @@ -361,7 +357,7 @@ int best_offset_server(const ntp_server_results *slist, int nservers){ * 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 *stratum, int *status){ +double offset_request(const char *host, int *status){ int i=0, j=0, ga_result=0, num_hosts=0, *socklist=NULL, respnum=0; int servers_completed=0, one_written=0, one_read=0, servers_readable=0, best_index=-1; time_t now_time=0, start_ts=0; @@ -458,7 +454,7 @@ double offset_request(const char *host, int *stratum, int *status){ respnum=servers[i].num_responses++; servers[i].offset[respnum]=calc_offset(&req[i], &recv_time); if(verbose) { - printf("offset %.10g, stratum %i\n", servers[i].offset[respnum], req[i].stratum); + printf("offset %.10g\n", servers[i].offset[respnum]); } servers[i].stratum=req[i].stratum; servers[i].rtdisp=NTP32asDOUBLE(req[i].rtdisp); @@ -487,7 +483,6 @@ double offset_request(const char *host, int *stratum, int *status){ avg_offset+=servers[best_index].offset[j]; } avg_offset/=servers[best_index].num_responses; - *stratum = servers[best_index].stratum; } /* cleanup */ @@ -665,8 +660,6 @@ int process_arguments(int argc, char **argv){ {"use-ipv6", no_argument, 0, '6'}, {"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'}, {"timeout", required_argument, 0, 't'}, @@ -679,7 +672,7 @@ int process_arguments(int argc, char **argv){ usage ("\n"); while (1) { - c = getopt_long (argc, argv, "Vhv46w:c:W:C:j:k:t:H:", longopts, &option); + c = getopt_long (argc, argv, "Vhv46w:c:j:k:t:H:", longopts, &option); if (c == -1 || c == EOF || c == 1) break; @@ -703,14 +696,6 @@ int process_arguments(int argc, char **argv){ 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; @@ -767,16 +752,8 @@ char *perfd_jitter (double jitter) 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); -} - int main(int argc, char *argv[]){ - int result, offset_result, jitter_result, stratum; + int result, offset_result, jitter_result; double offset=0, jitter=0; char *result_line, *perfdata_line; @@ -787,7 +764,6 @@ int main(int argc, char *argv[]){ set_thresholds(&offset_thresholds, owarn, ocrit); set_thresholds(&jitter_thresholds, jwarn, jcrit); - set_thresholds(&stratum_thresholds, swarn, scrit); /* initialize alarm signal handling */ signal (SIGALRM, socket_timeout_alarm_handler); @@ -795,15 +771,14 @@ int main(int argc, char *argv[]){ /* set socket timeout */ alarm (socket_timeout); - offset = offset_request(server_address, &stratum, &offset_result); + offset = offset_request(server_address, &offset_result); + /* check_ntp used to always return 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); } - result = max_state(result, offset_result); - if(do_stratum) - result = max_state(result, get_status(stratum, stratum_thresholds)); /* If not told to check the jitter, we don't even send packets. * jitter is checked using NTP control packets, which not all @@ -812,13 +787,13 @@ int main(int argc, char *argv[]){ */ if(do_jitter){ jitter=jitter_request(server_address, &jitter_result); - result = max_state(result, get_status(jitter, jitter_thresholds)); + 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(result, jitter_result); + result = max_state_alt(result, jitter_result); switch (result) { case STATE_CRITICAL : @@ -838,11 +813,6 @@ int main(int argc, char *argv[]){ asprintf(&result_line, "%s %s", result_line, _("Offset unknown")); asprintf(&perfdata_line, ""); } else { -#if 0 /* 2007-10-25 This can't happen. Leftovers or uninplemented? */ - if(offset_result==STATE_WARNING){ - asprintf(&result_line, "%s %s", result_line, _("Unable to fully sample sync server")); - } -#endif asprintf(&result_line, "%s Offset %.10g secs", result_line, offset); asprintf(&perfdata_line, "%s", perfd_offset(offset)); } @@ -850,10 +820,6 @@ int main(int argc, char *argv[]){ asprintf(&result_line, "%s, jitter=%f", result_line, jitter); asprintf(&perfdata_line, "%s %s", perfdata_line, perfd_jitter(jitter)); } - if (do_stratum) { - asprintf(&result_line, "%s, stratum=%i", result_line, stratum); - asprintf(&perfdata_line, "%s %s", perfdata_line, perfd_stratum(stratum)); - } printf("%s|%s\n", result_line, perfdata_line); if(server_address!=NULL) free(server_address); @@ -879,10 +845,6 @@ void print_help(void){ 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, --warning=THRESHOLD"); - printf (" %s\n", _("Warning threshold for stratum")); - printf (" %s\n", "-W, --critical=THRESHOLD"); - printf (" %s\n", _("Critical threshold for stratum")); printf (" %s\n", "-j, --warning=THRESHOLD"); printf (" %s\n", _("Warning threshold for jitter")); printf (" %s\n", "-k, --critical=THRESHOLD"); @@ -903,8 +865,6 @@ void print_help(void){ 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(" %s\n", _("Check only stratum:")); - printf(" %s\n", ("./check_ntp -H ntpserv -W 4 -C 6")); printf (_(UT_SUPPORT)); } @@ -913,6 +873,5 @@ void print_usage(void) { printf (_("Usage:")); - printf(" %s -H [-w ] [-c ] [-W ] [-C ]\n", progname); - printf(" [-j ] [-k ] [-v verbose]\n"); + printf(" %s -H [-w ] [-c ] [-j ] [-k ] [-v verbose]\n", progname); } diff --git a/plugins/check_ntp_peer.c b/plugins/check_ntp_peer.c new file mode 100644 index 00000000..840fe0ac --- /dev/null +++ b/plugins/check_ntp_peer.c @@ -0,0 +1,618 @@ +/****************************************************************************** +* +* Nagios check_ntp_peer plugin +* +* License: GPL +* Copyright (c) 2006 sean finney +* Copyright (c) 2007 nagios-plugins team +* +* Last Modified: $Date$ +* +* Description: +* +* This file contains the check_ntp_peer plugin +* +* This plugin to check ntp servers independant of any commandline +* programs or external libraries. +* +* +* License Information: +* +* 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 2 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, write to the Free Software +* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id$ + +*****************************************************************************/ + +const char *progname = "check_ntp_peer"; +const char *revision = "$Revision$"; +const char *copyright = "2007"; +const char *email = "nagiosplug-devel@lists.sourceforge.net"; + +#include "common.h" +#include "netutils.h" +#include "utils.h" + +static char *server_address=NULL; +static int verbose=0; +static short do_offset=0; +static char *owarn="60"; +static char *ocrit="120"; +static short do_stratum=0; +static char *swarn="16"; +static char *scrit="16"; +static short do_jitter=0; +static char *jwarn="5000"; +static char *jcrit="10000"; +static int syncsource_found=0; + +int process_arguments (int, char **); +thresholds *offset_thresholds = NULL; +thresholds *jitter_thresholds = NULL; +thresholds *stratum_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 reponses */ +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 + +/* 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)+((m.count)?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= PEER_INCLUDED){ + if(PEER_SEL(peer[i].status) >= PEER_SYNCSOURCE){ + printf(" <-- current sync source"); + } else { + printf(" <-- current sync candidate"); + } + } + printf("\n"); + } + } +} + +char *extract_value(const char *varlist, const char *name){ + char *tmpvarlist=NULL, *tmpkey=NULL, *value=NULL; + int last=0; + + tmpvarlist = strdup(varlist); + tmpkey = strtok(tmpvarlist, "="); + + do { + if(strstr(tmpkey, name) != NULL) { + value = strtok(NULL, ","); + last = 1; + } + } while (last == 0 && (tmpkey = strtok(NULL, "="))); + + return value; +} + +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 */ +} + +/* XXX handle responses with the error bit set */ +int ntp_request(const char *host, double *offset, int *offset_result, double *jitter, int *stratum){ + int conn=-1, i, npeers=0, num_candidates=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 *value=NULL, *nptr=NULL; + void *tmp; + + status = STATE_OK; + *offset_result = STATE_UNKNOWN; + *jitter = *stratum = -1; + + /* 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, 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("recieving 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=1; + min_peer_sel=PEER_SYNCSOURCE; + } + } + } + if(verbose) printf("%d candiate 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"); + } + + + 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){ + if(verbose) printf("Getting offset, jitter and stratum for peer %.2x\n", ntohs(peers[i].assoc)); + 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 intepretation 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("recieving 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 = "stratum,offset,dispersion"; + i--; + continue; + } + + if(verbose > 1) + printf("Server responded: >>>%s<<<\n", req.data); + + /* get the offset */ + if(verbose) + printf("parsing offset from peer %.2x: ", ntohs(peers[i].assoc)); + + value = extract_value(req.data, "offset"); + /* Convert the value if we have one */ + if(value != NULL) + *offset = strtod(value, &nptr) / 1000; + /* If value is null or no conversion was performed */ + if(value == NULL || value==nptr) { + printf("warning: unable to read server offset response.\n"); + status = max_state_alt(status, STATE_CRITICAL); + } else { + *offset_result = STATE_OK; + if(verbose) printf("%g\n", *offset); + } + + if(do_jitter) { + /* first reset the pointers */ + value = NULL, nptr=NULL; + /* get the jitter */ + if(verbose) { + printf("parsing jitter from peer %.2x: ", ntohs(peers[i].assoc)); + } + value = extract_value(req.data, strstr(getvar, "dispersion") != NULL ? "dispersion" : "jitter"); + /* 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){ + printf("warning: unable to read server jitter response.\n"); + status = max_state_alt(status, STATE_UNKNOWN); + } else { + if(verbose) printf("%g\n", *jitter); + } + } + + if(do_stratum) { + value = NULL; + /* get the stratum */ + if(verbose) { + printf("parsing stratum from peer %.2x: ", ntohs(peers[i].assoc)); + } + value = extract_value(req.data, "stratum"); + if(value == NULL){ + printf("warning: unable to read server stratum response.\n"); + status = max_state_alt(status, STATE_UNKNOWN); + } else { + *stratum = atoi(value); + 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'}, + {"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'}, + {"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:W:C:j:k:t:H:", longopts, &option); + if (c == -1 || c == EOF || c == 1) + break; + + switch (c) { + case 'h': + print_help(); + exit(STATE_OK); + break; + case 'V': + print_revision(progname, revision); + exit(STATE_OK); + break; + case 'v': + verbose++; + 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 'H': + if(is_host(optarg) == FALSE) + 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); +} + +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); +} + +int main(int argc, char *argv[]){ + int result, offset_result, stratum; + double offset=0, jitter=0; + char *result_line, *perfdata_line; + + result = offset_result = STATE_OK; + + 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); + + /* initialize alarm signal handling */ + signal (SIGALRM, socket_timeout_alarm_handler); + + /* set socket timeout */ + alarm (socket_timeout); + + result = ntp_request(server_address, &offset, &offset_result, &jitter, &stratum); + result = max_state_alt(result, get_status(fabs(offset), offset_thresholds)); + + if(do_stratum) + result = max_state_alt(result, get_status(stratum, stratum_thresholds)); + + if(do_jitter) + result = max_state_alt(result, get_status(jitter, jitter_thresholds)); + + switch (result) { + case STATE_CRITICAL : + asprintf(&result_line, "NTP CRITICAL:"); + break; + case STATE_WARNING : + asprintf(&result_line, "NTP WARNING:"); + break; + case STATE_OK : + asprintf(&result_line, "NTP OK:"); + break; + default : + asprintf(&result_line, "NTP UNKNOWN:"); + break; + } + if(!syncsource_found) + asprintf(&result_line, "%s %s, ", result_line, _("Server not synchronized")); + + if(offset_result == STATE_UNKNOWN){ + asprintf(&result_line, "%s %s", result_line, _("Offset unknown")); + asprintf(&perfdata_line, ""); + } else { + asprintf(&result_line, "%s Offset %.10g secs", result_line, offset); + asprintf(&perfdata_line, "%s", perfd_offset(offset)); + } + if (do_jitter) { + asprintf(&result_line, "%s, jitter=%f", result_line, jitter); + asprintf(&perfdata_line, "%s %s", perfdata_line, perfd_jitter(jitter)); + } + if (do_stratum) { + asprintf(&result_line, "%s, stratum=%i", result_line, stratum); + asprintf(&perfdata_line, "%s %s", perfdata_line, perfd_stratum(stratum)); + } + printf("%s|%s\n", result_line, perfdata_line); + + if(server_address!=NULL) free(server_address); + return result; +} + + + +void print_help(void){ + print_revision(progname, revision); + + 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_HOST_PORT), 'p', "123"); + 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, --warning=THRESHOLD"); + printf (" %s\n", _("Warning threshold for stratum")); + printf (" %s\n", "-W, --critical=THRESHOLD"); + printf (" %s\n", _("Critical threshold for stratum")); + printf (" %s\n", "-j, --warning=THRESHOLD"); + printf (" %s\n", _("Warning threshold for jitter")); + printf (" %s\n", "-k, --critical=THRESHOLD"); + printf (" %s\n", _("Critical threshold for jitter")); + printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); + printf (_(UT_VERBOSE)); + + printf("\n"); + printf("%s\n", _("Notes:")); + printf(" %s\n", _("See:")); + printf(" %s\n", ("http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT")); + printf(" %s\n", _("for THRESHOLD format and examples.")); + + printf("\n"); + printf("%s\n", _("Examples:")); + printf(" %s\n", _("Normal offset check:")); + printf(" %s\n", ("./check_ntp_peer -H ntpserv -w 0.5 -c 1")); + 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(" %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 (_("Usage:")); + printf(" %s -H [-w ] [-c ] [-W ] [-C ]\n", progname); + printf(" [-j ] [-k ] [-v verbose]\n"); +} diff --git a/plugins/check_ntp_time.c b/plugins/check_ntp_time.c new file mode 100644 index 00000000..c945076d --- /dev/null +++ b/plugins/check_ntp_time.c @@ -0,0 +1,615 @@ +/****************************************************************************** +* +* Nagios check_ntp_time plugin +* +* License: GPL +* Copyright (c) 2006 sean finney +* Copyright (c) 2007 nagios-plugins team +* +* Last Modified: $Date$ +* +* Description: +* +* This file contains the check_ntp_time plugin +* +* This plugin checks the clock offset with an NTP server. It is +* independant of any commandline programs or external libraries. +* +* +* License Information: +* +* 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 2 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, write to the Free Software +* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id$ + +*****************************************************************************/ + +const char *progname = "check_ntp_time"; +const char *revision = "$Revision$"; +const char *copyright = "2007"; +const char *email = "nagiosplug-devel@lists.sourceforge.net"; + +#include "common.h" +#include "netutils.h" +#include "utils.h" + +static char *server_address=NULL; +static int verbose=0; +static char *owarn="60"; +static char *ocrit="120"; + +int process_arguments (int, char **); +thresholds *offset_thresholds = NULL; +void print_help (void); +void print_usage (void); + +/* number of times to perform each request to get a good average. */ +#define AVG_NUM 4 + +/* 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 recieved 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; + +/* 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)+((m.count)?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 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 i=0, j=0, cserver=0, candidates[5], csize=0; + + /* for each server */ + for(cserver=0; cserveri; j--){ + candidates[j]=candidates[j-1]; + } + } + /* regardless, if they should be on the list... */ + if(i<5) { + candidates[i]=cserver; + if(csize<5) csize++; + /* otherwise discard the server */ + } else { + DBG(printf("discarding peer id %d\n", cserver)); + } + } + + if(csize>0) { + DBG(printf("best server selected: peer %d\n", candidates[0])); + return candidates[0]; + } 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, j=0, ga_result=0, num_hosts=0, *socklist=NULL, respnum=0; + int servers_completed=0, one_written=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); + + /* 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)){ + die(STATE_UNKNOWN, "can't create socket connection"); + } 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_completedwarning->end, + TRUE, offset_thresholds->critical->end, + FALSE, 0, FALSE, 0); +} + +int main(int argc, char *argv[]){ + int result, offset_result; + double offset=0; + char *result_line, *perfdata_line; + + result = offset_result = STATE_OK; + + if (process_arguments (argc, argv) == ERROR) + usage4 (_("Could not parse arguments")); + + set_thresholds(&offset_thresholds, owarn, ocrit); + + /* initialize alarm signal handling */ + signal (SIGALRM, socket_timeout_alarm_handler); + + /* set socket timeout */ + alarm (socket_timeout); + + offset = offset_request(server_address, &offset_result); + if (offset_result == STATE_UNKNOWN) { + result = STATE_CRITICAL; + } else { + result = get_status(fabs(offset), offset_thresholds); + } + + switch (result) { + case STATE_CRITICAL : + asprintf(&result_line, "NTP CRITICAL:"); + break; + case STATE_WARNING : + asprintf(&result_line, "NTP WARNING:"); + break; + case STATE_OK : + asprintf(&result_line, "NTP OK:"); + break; + default : + asprintf(&result_line, "NTP UNKNOWN:"); + break; + } + if(offset_result == STATE_UNKNOWN){ + asprintf(&result_line, "%s %s", result_line, _("Offset unknown")); + asprintf(&perfdata_line, ""); + } else { + asprintf(&result_line, "%s Offset %.10g secs", result_line, offset); + asprintf(&perfdata_line, "%s", perfd_offset(offset)); + } + printf("%s|%s\n", result_line, perfdata_line); + + if(server_address!=NULL) free(server_address); + return result; +} + +void print_help(void){ + print_revision(progname, revision); + + printf ("Copyright (c) 2006 Sean Finney\n"); + printf (COPYRIGHT, copyright, email); + + printf ("%s\n", _("This plugin checks the clock offset with the ntp server")); + + printf ("\n\n"); + + print_usage(); + printf (_(UT_HELP_VRSN)); + printf (_(UT_HOST_PORT), 'p', "123"); + 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 (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); + printf (_(UT_VERBOSE)); + + printf("\n"); + printf("%s\n", _("Notes:")); + printf(" %s\n", _("See:")); + printf(" %s\n", ("http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT")); + printf(" %s\n", _("for THRESHOLD format and examples.")); + + printf("\n"); + printf("%s\n", _("Examples:")); + printf(" %s\n", ("./check_ntp_time -H ntpserv -w 0.5 -c 1")); + + printf (_(UT_SUPPORT)); +} + +void +print_usage(void) +{ + printf (_("Usage:")); + printf(" %s -H [-w ] [-c ] [-W ] [-C ]\n", progname); + printf(" [-j ] [-k ] [-v verbose]\n"); +} + diff --git a/plugins/check_ntpd.c b/plugins/check_ntpd.c deleted file mode 100644 index 840fe0ac..00000000 --- a/plugins/check_ntpd.c +++ /dev/null @@ -1,618 +0,0 @@ -/****************************************************************************** -* -* Nagios check_ntp_peer plugin -* -* License: GPL -* Copyright (c) 2006 sean finney -* Copyright (c) 2007 nagios-plugins team -* -* Last Modified: $Date$ -* -* Description: -* -* This file contains the check_ntp_peer plugin -* -* This plugin to check ntp servers independant of any commandline -* programs or external libraries. -* -* -* License Information: -* -* 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 2 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, write to the Free Software -* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id$ - -*****************************************************************************/ - -const char *progname = "check_ntp_peer"; -const char *revision = "$Revision$"; -const char *copyright = "2007"; -const char *email = "nagiosplug-devel@lists.sourceforge.net"; - -#include "common.h" -#include "netutils.h" -#include "utils.h" - -static char *server_address=NULL; -static int verbose=0; -static short do_offset=0; -static char *owarn="60"; -static char *ocrit="120"; -static short do_stratum=0; -static char *swarn="16"; -static char *scrit="16"; -static short do_jitter=0; -static char *jwarn="5000"; -static char *jcrit="10000"; -static int syncsource_found=0; - -int process_arguments (int, char **); -thresholds *offset_thresholds = NULL; -thresholds *jitter_thresholds = NULL; -thresholds *stratum_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 reponses */ -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 - -/* 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)+((m.count)?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= PEER_INCLUDED){ - if(PEER_SEL(peer[i].status) >= PEER_SYNCSOURCE){ - printf(" <-- current sync source"); - } else { - printf(" <-- current sync candidate"); - } - } - printf("\n"); - } - } -} - -char *extract_value(const char *varlist, const char *name){ - char *tmpvarlist=NULL, *tmpkey=NULL, *value=NULL; - int last=0; - - tmpvarlist = strdup(varlist); - tmpkey = strtok(tmpvarlist, "="); - - do { - if(strstr(tmpkey, name) != NULL) { - value = strtok(NULL, ","); - last = 1; - } - } while (last == 0 && (tmpkey = strtok(NULL, "="))); - - return value; -} - -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 */ -} - -/* XXX handle responses with the error bit set */ -int ntp_request(const char *host, double *offset, int *offset_result, double *jitter, int *stratum){ - int conn=-1, i, npeers=0, num_candidates=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 *value=NULL, *nptr=NULL; - void *tmp; - - status = STATE_OK; - *offset_result = STATE_UNKNOWN; - *jitter = *stratum = -1; - - /* 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, 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("recieving 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=1; - min_peer_sel=PEER_SYNCSOURCE; - } - } - } - if(verbose) printf("%d candiate 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"); - } - - - 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){ - if(verbose) printf("Getting offset, jitter and stratum for peer %.2x\n", ntohs(peers[i].assoc)); - 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 intepretation 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("recieving 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 = "stratum,offset,dispersion"; - i--; - continue; - } - - if(verbose > 1) - printf("Server responded: >>>%s<<<\n", req.data); - - /* get the offset */ - if(verbose) - printf("parsing offset from peer %.2x: ", ntohs(peers[i].assoc)); - - value = extract_value(req.data, "offset"); - /* Convert the value if we have one */ - if(value != NULL) - *offset = strtod(value, &nptr) / 1000; - /* If value is null or no conversion was performed */ - if(value == NULL || value==nptr) { - printf("warning: unable to read server offset response.\n"); - status = max_state_alt(status, STATE_CRITICAL); - } else { - *offset_result = STATE_OK; - if(verbose) printf("%g\n", *offset); - } - - if(do_jitter) { - /* first reset the pointers */ - value = NULL, nptr=NULL; - /* get the jitter */ - if(verbose) { - printf("parsing jitter from peer %.2x: ", ntohs(peers[i].assoc)); - } - value = extract_value(req.data, strstr(getvar, "dispersion") != NULL ? "dispersion" : "jitter"); - /* 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){ - printf("warning: unable to read server jitter response.\n"); - status = max_state_alt(status, STATE_UNKNOWN); - } else { - if(verbose) printf("%g\n", *jitter); - } - } - - if(do_stratum) { - value = NULL; - /* get the stratum */ - if(verbose) { - printf("parsing stratum from peer %.2x: ", ntohs(peers[i].assoc)); - } - value = extract_value(req.data, "stratum"); - if(value == NULL){ - printf("warning: unable to read server stratum response.\n"); - status = max_state_alt(status, STATE_UNKNOWN); - } else { - *stratum = atoi(value); - 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'}, - {"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'}, - {"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:W:C:j:k:t:H:", longopts, &option); - if (c == -1 || c == EOF || c == 1) - break; - - switch (c) { - case 'h': - print_help(); - exit(STATE_OK); - break; - case 'V': - print_revision(progname, revision); - exit(STATE_OK); - break; - case 'v': - verbose++; - 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 'H': - if(is_host(optarg) == FALSE) - 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); -} - -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); -} - -int main(int argc, char *argv[]){ - int result, offset_result, stratum; - double offset=0, jitter=0; - char *result_line, *perfdata_line; - - result = offset_result = STATE_OK; - - 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); - - /* initialize alarm signal handling */ - signal (SIGALRM, socket_timeout_alarm_handler); - - /* set socket timeout */ - alarm (socket_timeout); - - result = ntp_request(server_address, &offset, &offset_result, &jitter, &stratum); - result = max_state_alt(result, get_status(fabs(offset), offset_thresholds)); - - if(do_stratum) - result = max_state_alt(result, get_status(stratum, stratum_thresholds)); - - if(do_jitter) - result = max_state_alt(result, get_status(jitter, jitter_thresholds)); - - switch (result) { - case STATE_CRITICAL : - asprintf(&result_line, "NTP CRITICAL:"); - break; - case STATE_WARNING : - asprintf(&result_line, "NTP WARNING:"); - break; - case STATE_OK : - asprintf(&result_line, "NTP OK:"); - break; - default : - asprintf(&result_line, "NTP UNKNOWN:"); - break; - } - if(!syncsource_found) - asprintf(&result_line, "%s %s, ", result_line, _("Server not synchronized")); - - if(offset_result == STATE_UNKNOWN){ - asprintf(&result_line, "%s %s", result_line, _("Offset unknown")); - asprintf(&perfdata_line, ""); - } else { - asprintf(&result_line, "%s Offset %.10g secs", result_line, offset); - asprintf(&perfdata_line, "%s", perfd_offset(offset)); - } - if (do_jitter) { - asprintf(&result_line, "%s, jitter=%f", result_line, jitter); - asprintf(&perfdata_line, "%s %s", perfdata_line, perfd_jitter(jitter)); - } - if (do_stratum) { - asprintf(&result_line, "%s, stratum=%i", result_line, stratum); - asprintf(&perfdata_line, "%s %s", perfdata_line, perfd_stratum(stratum)); - } - printf("%s|%s\n", result_line, perfdata_line); - - if(server_address!=NULL) free(server_address); - return result; -} - - - -void print_help(void){ - print_revision(progname, revision); - - 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_HOST_PORT), 'p', "123"); - 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, --warning=THRESHOLD"); - printf (" %s\n", _("Warning threshold for stratum")); - printf (" %s\n", "-W, --critical=THRESHOLD"); - printf (" %s\n", _("Critical threshold for stratum")); - printf (" %s\n", "-j, --warning=THRESHOLD"); - printf (" %s\n", _("Warning threshold for jitter")); - printf (" %s\n", "-k, --critical=THRESHOLD"); - printf (" %s\n", _("Critical threshold for jitter")); - printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); - printf (_(UT_VERBOSE)); - - printf("\n"); - printf("%s\n", _("Notes:")); - printf(" %s\n", _("See:")); - printf(" %s\n", ("http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT")); - printf(" %s\n", _("for THRESHOLD format and examples.")); - - printf("\n"); - printf("%s\n", _("Examples:")); - printf(" %s\n", _("Normal offset check:")); - printf(" %s\n", ("./check_ntp_peer -H ntpserv -w 0.5 -c 1")); - 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(" %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 (_("Usage:")); - printf(" %s -H [-w ] [-c ] [-W ] [-C ]\n", progname); - printf(" [-j ] [-k ] [-v verbose]\n"); -} diff --git a/plugins/check_time_ntp.c b/plugins/check_time_ntp.c deleted file mode 100644 index c945076d..00000000 --- a/plugins/check_time_ntp.c +++ /dev/null @@ -1,615 +0,0 @@ -/****************************************************************************** -* -* Nagios check_ntp_time plugin -* -* License: GPL -* Copyright (c) 2006 sean finney -* Copyright (c) 2007 nagios-plugins team -* -* Last Modified: $Date$ -* -* Description: -* -* This file contains the check_ntp_time plugin -* -* This plugin checks the clock offset with an NTP server. It is -* independant of any commandline programs or external libraries. -* -* -* License Information: -* -* 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 2 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, write to the Free Software -* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id$ - -*****************************************************************************/ - -const char *progname = "check_ntp_time"; -const char *revision = "$Revision$"; -const char *copyright = "2007"; -const char *email = "nagiosplug-devel@lists.sourceforge.net"; - -#include "common.h" -#include "netutils.h" -#include "utils.h" - -static char *server_address=NULL; -static int verbose=0; -static char *owarn="60"; -static char *ocrit="120"; - -int process_arguments (int, char **); -thresholds *offset_thresholds = NULL; -void print_help (void); -void print_usage (void); - -/* number of times to perform each request to get a good average. */ -#define AVG_NUM 4 - -/* 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 recieved 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; - -/* 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)+((m.count)?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 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 i=0, j=0, cserver=0, candidates[5], csize=0; - - /* for each server */ - for(cserver=0; cserveri; j--){ - candidates[j]=candidates[j-1]; - } - } - /* regardless, if they should be on the list... */ - if(i<5) { - candidates[i]=cserver; - if(csize<5) csize++; - /* otherwise discard the server */ - } else { - DBG(printf("discarding peer id %d\n", cserver)); - } - } - - if(csize>0) { - DBG(printf("best server selected: peer %d\n", candidates[0])); - return candidates[0]; - } 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, j=0, ga_result=0, num_hosts=0, *socklist=NULL, respnum=0; - int servers_completed=0, one_written=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); - - /* 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)){ - die(STATE_UNKNOWN, "can't create socket connection"); - } 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_completedwarning->end, - TRUE, offset_thresholds->critical->end, - FALSE, 0, FALSE, 0); -} - -int main(int argc, char *argv[]){ - int result, offset_result; - double offset=0; - char *result_line, *perfdata_line; - - result = offset_result = STATE_OK; - - if (process_arguments (argc, argv) == ERROR) - usage4 (_("Could not parse arguments")); - - set_thresholds(&offset_thresholds, owarn, ocrit); - - /* initialize alarm signal handling */ - signal (SIGALRM, socket_timeout_alarm_handler); - - /* set socket timeout */ - alarm (socket_timeout); - - offset = offset_request(server_address, &offset_result); - if (offset_result == STATE_UNKNOWN) { - result = STATE_CRITICAL; - } else { - result = get_status(fabs(offset), offset_thresholds); - } - - switch (result) { - case STATE_CRITICAL : - asprintf(&result_line, "NTP CRITICAL:"); - break; - case STATE_WARNING : - asprintf(&result_line, "NTP WARNING:"); - break; - case STATE_OK : - asprintf(&result_line, "NTP OK:"); - break; - default : - asprintf(&result_line, "NTP UNKNOWN:"); - break; - } - if(offset_result == STATE_UNKNOWN){ - asprintf(&result_line, "%s %s", result_line, _("Offset unknown")); - asprintf(&perfdata_line, ""); - } else { - asprintf(&result_line, "%s Offset %.10g secs", result_line, offset); - asprintf(&perfdata_line, "%s", perfd_offset(offset)); - } - printf("%s|%s\n", result_line, perfdata_line); - - if(server_address!=NULL) free(server_address); - return result; -} - -void print_help(void){ - print_revision(progname, revision); - - printf ("Copyright (c) 2006 Sean Finney\n"); - printf (COPYRIGHT, copyright, email); - - printf ("%s\n", _("This plugin checks the clock offset with the ntp server")); - - printf ("\n\n"); - - print_usage(); - printf (_(UT_HELP_VRSN)); - printf (_(UT_HOST_PORT), 'p', "123"); - 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 (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); - printf (_(UT_VERBOSE)); - - printf("\n"); - printf("%s\n", _("Notes:")); - printf(" %s\n", _("See:")); - printf(" %s\n", ("http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT")); - printf(" %s\n", _("for THRESHOLD format and examples.")); - - printf("\n"); - printf("%s\n", _("Examples:")); - printf(" %s\n", ("./check_ntp_time -H ntpserv -w 0.5 -c 1")); - - printf (_(UT_SUPPORT)); -} - -void -print_usage(void) -{ - printf (_("Usage:")); - printf(" %s -H [-w ] [-c ] [-W ] [-C ]\n", progname); - printf(" [-j ] [-k ] [-v verbose]\n"); -} - diff --git a/plugins/t/check_ntp.t b/plugins/t/check_ntp.t index a36a730d..e7eb0c41 100644 --- a/plugins/t/check_ntp.t +++ b/plugins/t/check_ntp.t @@ -9,8 +9,8 @@ use strict; use Test::More; use NPTest; -my @PLUGINS1 = ('check_ntp', 'check_ntpd', 'check_time_ntp'); -my @PLUGINS2 = ('check_ntp', 'check_ntpd'); +my @PLUGINS1 = ('check_ntp', 'check_ntp_peer', 'check_ntp_time'); +my @PLUGINS2 = ('check_ntp_peer'); plan tests => (9 * scalar(@PLUGINS1)) + (6 * scalar(@PLUGINS2)); @@ -45,19 +45,19 @@ foreach my $plugin (@PLUGINS1) { $res = NPTest->testCmd( "./$plugin -H $ntp_service -w 1000 -c 2000" ); - cmp_ok( $res->return_code, '==', 0, "Got good NTP result"); + cmp_ok( $res->return_code, '==', 0, "$plugin: Got good NTP result"); like( $res->output, $ntp_okmatch1, "Output OK" ); $res = NPTest->testCmd( "./$plugin -H $ntp_service -w 1000: -c 2000" ); - cmp_ok( $res->return_code, '==', 1, "Got warning NTP result"); + cmp_ok( $res->return_code, '==', 1, "$plugin: Got warning NTP result"); like( $res->output, $ntp_warnmatch1, "Output WARNING" ); $res = NPTest->testCmd( "./$plugin -H $ntp_service -w 1000 -c 2000:" ); - cmp_ok( $res->return_code, '==', 2, "Got critical NTP result"); + cmp_ok( $res->return_code, '==', 2, "$plugin: Got critical NTP result"); like( $res->output, $ntp_critmatch1, "Output CRITICAL" ); } @@ -66,18 +66,18 @@ foreach my $plugin (@PLUGINS1) { $res = NPTest->testCmd( "./$plugin -H $no_ntp_service" ); - cmp_ok( $res->return_code, '==', 2, "Got bad NTP result"); + cmp_ok( $res->return_code, '==', 2, "$plugin: Got bad NTP result"); } $res = NPTest->testCmd( "./$plugin -H $host_nonresponsive" ); - cmp_ok( $res->return_code, '==', 2, "Got critical if server not responding"); + cmp_ok( $res->return_code, '==', 2, "$plugin: Got critical if server not responding"); $res = NPTest->testCmd( "./$plugin -H $hostname_invalid" ); - cmp_ok( $res->return_code, '==', 3, "Got critical if server hostname invalid"); + cmp_ok( $res->return_code, '==', 3, "$plugin: Got critical if server hostname invalid"); } @@ -87,19 +87,19 @@ foreach my $plugin (@PLUGINS2) { $res = NPTest->testCmd( "./$plugin -H $ntp_service -w 1000 -c 2000 -W 20 -C 21 -j 100000 -k 200000" ); - cmp_ok( $res->return_code, '==', 0, "Got good NTP result"); + cmp_ok( $res->return_code, '==', 0, "$plugin: Got good NTP result"); like( $res->output, $ntp_okmatch2, "Output OK" ); $res = NPTest->testCmd( "./$plugin -H $ntp_service -w 1000 -c 2000 -W ~:-1 -C 21 -j 100000 -k 200000" ); - cmp_ok( $res->return_code, '==', 1, "Got warning NTP result"); + cmp_ok( $res->return_code, '==', 1, "$plugin: Got warning NTP result"); like( $res->output, $ntp_warnmatch2, "Output WARNING" ); $res = NPTest->testCmd( "./$plugin -H $ntp_service -w 1000 -c 2000 -W 20 -C 21 -j 100000 -k ~:-1" ); - cmp_ok( $res->return_code, '==', 2, "Got critical NTP result"); + cmp_ok( $res->return_code, '==', 2, "$plugin: Got critical NTP result"); like( $res->output, $ntp_critmatch2, "Output CRITICAL" ); } } diff --git a/plugins/utils.c b/plugins/utils.c index 0e79fbdb..88b44114 100644 --- a/plugins/utils.c +++ b/plugins/utils.c @@ -53,6 +53,33 @@ max_state (int a, int b) return max (a, b); } +/* ************************************************************************** + * max_state_alt(STATE_x, STATE_y) + * compares STATE_x to STATE_y and returns result based on the following + * STATE_OK < STATE_DEPENDENT < STATE_UNKNOWN < STATE_WARNING < STATE_CRITICAL + * + * The main difference between max_state_alt and max_state it that it doesn't + * allow setting a default to UNKNOWN. It will instead prioritixe any valid + * non-OK state. + ****************************************************************************/ + +int +max_state_alt (int a, int b) +{ + if (a == STATE_CRITICAL || b == STATE_CRITICAL) + return STATE_CRITICAL; + else if (a == STATE_WARNING || b == STATE_WARNING) + return STATE_WARNING; + else if (a == STATE_UNKNOWN || b == STATE_UNKNOWN) + return STATE_UNKNOWN; + else if (a == STATE_DEPENDENT || b == STATE_DEPENDENT) + return STATE_DEPENDENT; + else if (a == STATE_OK || b == STATE_OK) + return STATE_OK; + else + return max (a, b); +} + void usage (const char *msg) { printf ("%s\n", msg); diff --git a/plugins/utils.h b/plugins/utils.h index f15a7b16..bb99ee16 100644 --- a/plugins/utils.h +++ b/plugins/utils.h @@ -76,6 +76,7 @@ char *strpcpy (char *, const char *, const char *); char *strpcat (char *, const char *, const char *); int max_state (int a, int b); +int max_state_alt (int a, int b); void usage (const char *) __attribute__((noreturn)); void usage2(const char *, const char *) __attribute__((noreturn)); -- cgit v1.2.3-74-g34f1