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 --- plugins/check_time_ntp.c | 615 ----------------------------------------------- 1 file changed, 615 deletions(-) delete mode 100644 plugins/check_time_ntp.c (limited to 'plugins/check_time_ntp.c') 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"); -} - -- cgit v1.2.3-74-g34f1