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index 700fe8b689516ab0ef0a75f083eaac54b899a418..5f0224d54ec863317aa113bd9f1d3fed8a7076a3 100644 (file)
- /******************************************************************************
-*
+/*****************************************************************************
+*
* Nagios check_icmp plugin
-*
+*
* License: GPL
-* Copyright (c) 2005-2007 nagios-plugins team
-*
+* Copyright (c) 2005-2008 Nagios Plugins Development Team
* Original Author : Andreas Ericsson <ae@op5.se>
-*
-* Last Modified: $Date$
-*
+*
* Description:
-*
+*
* This file contains the check_icmp plugin
-*
-* Relevant RFC's: 792 (ICMP), 791 (IP)
-*
-* This program was modeled somewhat after the check_icmp program,
-* which was in turn a hack of fping (www.fping.org) but has been
-* completely rewritten since to generate higher precision rta values,
-* and support several different modes as well as setting ttl to control.
-* redundant routes. The only remainders of fping is currently a few
-* function names.
-*
-* License Information:
-*
-* This program is free software; you can redistribute it and/or modify
+*
+* Relevant RFC's: 792 (ICMP), 791 (IP)
+*
+* This program was modeled somewhat after the check_icmp program,
+* which was in turn a hack of fping (www.fping.org) but has been
+* completely rewritten since to generate higher precision rta values,
+* and support several different modes as well as setting ttl to control.
+* redundant routes. The only remainders of fping is currently a few
+* function names.
+*
+*
+* 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
+* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
-*
+*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
-*
+*
* You should have received a copy of the GNU General Public License
-* along with this program; if not, write to the Free Software
-* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*
-* $Id$
+* along with this program. If not, see <http://www.gnu.org/licenses/>.
+*
*
*****************************************************************************/
/* progname may change */
/* char *progname = "check_icmp"; */
char *progname;
-const char *revision = "$Revision$";
-const char *copyright = "2005-2007";
+const char *copyright = "2005-2008";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
/** nagios plugins basic includes */
#include <netinet/ip_icmp.h>
#include <arpa/inet.h>
#include <signal.h>
+#include <float.h>
/** sometimes undefined system macros (quite a few, actually) **/
# define ICMP_UNREACH_PRECEDENCE_CUTOFF 15
#endif
+#ifndef DBL_MAX
+# define DBL_MAX 9.9999999999e999
+#endif
typedef unsigned short range_t; /* type for get_range() -- unimplemented */
unsigned char icmp_type, icmp_code; /* type and code from errors */
unsigned short flags; /* control/status flags */
double rta; /* measured RTA */
+ double rtmax; /* max rtt */
+ double rtmin; /* min rtt */
unsigned char pl; /* measured packet loss */
struct rta_host *next; /* linked list */
} rta_host;
static u_int get_timevaldiff(struct timeval *, struct timeval *);
static in_addr_t get_ip_address(const char *);
static int wait_for_reply(int, u_int);
-static int recvfrom_wto(int, char *, unsigned int, struct sockaddr *, u_int *);
+static int recvfrom_wto(int, void *, unsigned int, struct sockaddr *, u_int *);
static int send_icmp_ping(int, struct rta_host *);
static int get_threshold(char *str, threshold *th);
static void run_checks(void);
static void set_source_ip(char *);
static int add_target(char *);
static int add_target_ip(char *, struct in_addr *);
-static int handle_random_icmp(struct icmp *, struct sockaddr_in *);
+static int handle_random_icmp(unsigned char *, struct sockaddr_in *);
static unsigned short icmp_checksum(unsigned short *, int);
static void finish(int);
static void crash(const char *, ...);
static struct rta_host **table, *cursor, *list;
static threshold crit = {80, 500000}, warn = {40, 200000};
static int mode, protocols, sockets, debug = 0, timeout = 10;
-static unsigned short icmp_pkt_size, icmp_data_size = DEFAULT_PING_DATA_SIZE;
+static unsigned short icmp_data_size = DEFAULT_PING_DATA_SIZE;
+static unsigned short icmp_pkt_size = DEFAULT_PING_DATA_SIZE + ICMP_MINLEN;
+
static unsigned int icmp_sent = 0, icmp_recv = 0, icmp_lost = 0;
#define icmp_pkts_en_route (icmp_sent - (icmp_recv + icmp_lost))
static unsigned short targets_down = 0, targets = 0, packets = 0;
}
static int
-handle_random_icmp(struct icmp *p, struct sockaddr_in *addr)
+handle_random_icmp(unsigned char *packet, struct sockaddr_in *addr)
{
- struct icmp sent_icmp;
+ struct icmp p, sent_icmp;
struct rta_host *host = NULL;
- unsigned char *ptr;
- if(p->icmp_type == ICMP_ECHO && p->icmp_id == pid) {
+ memcpy(&p, packet, sizeof(p));
+ if(p.icmp_type == ICMP_ECHO && ntohs(p.icmp_id) == pid) {
/* echo request from us to us (pinging localhost) */
return 0;
}
- ptr = (unsigned char *)p;
- if(debug) printf("handle_random_icmp(%p, %p)\n", (void *)p, (void *)addr);
+ if(debug) printf("handle_random_icmp(%p, %p)\n", (void *)&p, (void *)addr);
/* only handle a few types, since others can't possibly be replies to
* us in a sane network (if it is anyway, it will be counted as lost
* TIMXCEED actually sends a proper icmp response we will have passed
* too many hops to have a hope of reaching it later, in which case it
* indicates overconfidence in the network, poor routing or both. */
- if(p->icmp_type != ICMP_UNREACH && p->icmp_type != ICMP_TIMXCEED &&
- p->icmp_type != ICMP_SOURCEQUENCH && p->icmp_type != ICMP_PARAMPROB)
+ if(p.icmp_type != ICMP_UNREACH && p.icmp_type != ICMP_TIMXCEED &&
+ p.icmp_type != ICMP_SOURCEQUENCH && p.icmp_type != ICMP_PARAMPROB)
{
return 0;
}
/* might be for us. At least it holds the original package (according
* to RFC 792). If it isn't, just ignore it */
- memcpy(&sent_icmp, ptr + 28, sizeof(sent_icmp));
- if(sent_icmp.icmp_type != ICMP_ECHO || sent_icmp.icmp_id != pid ||
- sent_icmp.icmp_seq >= targets)
+ memcpy(&sent_icmp, packet + 28, sizeof(sent_icmp));
+ if(sent_icmp.icmp_type != ICMP_ECHO || ntohs(sent_icmp.icmp_id) != pid ||
+ ntohs(sent_icmp.icmp_seq) >= targets*packets)
{
if(debug) printf("Packet is no response to a packet we sent\n");
return 0;
}
/* it is indeed a response for us */
- host = table[sent_icmp.icmp_seq];
+ host = table[ntohs(sent_icmp.icmp_seq)/packets];
if(debug) {
printf("Received \"%s\" from %s for ICMP ECHO sent to %s.\n",
- get_icmp_error_msg(p->icmp_type, p->icmp_code),
+ get_icmp_error_msg(p.icmp_type, p.icmp_code),
inet_ntoa(addr->sin_addr), host->name);
}
/* source quench means we're sending too fast, so increase the
* interval and mark this packet lost */
- if(p->icmp_type == ICMP_SOURCEQUENCH) {
+ if(p.icmp_type == ICMP_SOURCEQUENCH) {
pkt_interval *= pkt_backoff_factor;
target_interval *= target_backoff_factor;
}
targets_down++;
host->flags |= FLAG_LOST_CAUSE;
}
- host->icmp_type = p->icmp_type;
- host->icmp_code = p->icmp_code;
+ host->icmp_type = p.icmp_type;
+ host->icmp_code = p.icmp_code;
host->error_addr.s_addr = addr->sin_addr.s_addr;
return 0;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
-
+
/* print a helpful error message if geteuid != 0 */
np_warn_if_not_root();
packets = 5;
}
+ /* Parse extra opts if any */
+ argv=np_extra_opts(&argc, argv, progname);
+
/* parse the arguments */
for(i = 1; i < argc; i++) {
while((arg = getopt(argc, argv, "vhVw:c:n:p:t:H:s:i:b:I:l:m:")) != EOF) {
+ long size;
switch(arg) {
case 'v':
debug++;
break;
case 'b':
- /* silently ignored for now */
+ size = strtol(optarg,NULL,0);
+ if (size >= (sizeof(struct icmp) + sizeof(struct icmp_ping_data)) &&
+ size < MAX_PING_DATA) {
+ icmp_data_size = size;
+ icmp_pkt_size = size + ICMP_MINLEN;
+ } else
+ usage_va("ICMP data length must be between: %d and %d",
+ sizeof(struct icmp) + sizeof(struct icmp_ping_data),
+ MAX_PING_DATA - 1);
+
break;
case 'i':
pkt_interval = get_timevar(optarg);
set_source_ip(optarg);
break;
case 'V': /* version */
- /*print_revision (progname, revision);*/ /* FIXME: Why? */
+ print_revision (progname, NP_VERSION);
exit (STATE_OK);
case 'h': /* help */
print_help ();
}
}
- icmp_pkt_size = icmp_data_size + ICMP_MINLEN;
- if(debug > 2) printf("icmp_pkt_size = %u\n", icmp_pkt_size);
- if(icmp_pkt_size < sizeof(struct icmp) + sizeof(struct icmp_ping_data)) {
- icmp_pkt_size = sizeof(struct icmp) + sizeof(struct icmp_ping_data);
- }
- if(debug > 2) printf("icmp_pkt_size = %u\n", icmp_pkt_size);
-
if(debug) {
printf("crit = {%u, %u%%}, warn = {%u, %u%%}\n",
crit.rta, crit.pl, warn.rta, warn.pl);
table = malloc(sizeof(struct rta_host **) * (argc - 1));
i = 0;
while(host) {
- host->id = i;
+ host->id = i*packets;
table[i] = host;
host = host->next;
i++;
table[t]->name);
continue;
}
-
+
/* we're still in the game, so send next packet */
(void)send_icmp_ping(icmp_sock, table[t]);
result = wait_for_reply(icmp_sock, target_interval);
wait_for_reply(int sock, u_int t)
{
int n, hlen;
- static char buf[4096];
+ static unsigned char buf[4096];
struct sockaddr_in resp_addr;
struct ip *ip;
struct icmp icp;
/* check the response */
memcpy(&icp, buf + hlen, sizeof(icp));
- if(icp.icmp_id != pid) {
- handle_random_icmp(&icp, &resp_addr);
- continue;
- }
-
- if(icp.icmp_type != ICMP_ECHOREPLY || icp.icmp_seq >= targets) {
+ if(ntohs(icp.icmp_id) != pid || icp.icmp_type != ICMP_ECHOREPLY ||
+ ntohs(icp.icmp_seq) >= targets*packets) {
if(debug > 2) printf("not a proper ICMP_ECHOREPLY\n");
- handle_random_icmp(&icp, &resp_addr);
+ handle_random_icmp(buf + hlen, &resp_addr);
continue;
}
/* this is indeed a valid response */
memcpy(&data, icp.icmp_data, sizeof(data));
+ if (debug > 2)
+ printf("ICMP echo-reply of len %u, id %u, seq %u, cksum 0x%X\n",
+ sizeof(data), ntohs(icp.icmp_id), ntohs(icp.icmp_seq), icp.icmp_cksum);
- host = table[icp.icmp_seq];
+ host = table[ntohs(icp.icmp_seq)/packets];
gettimeofday(&now, &tz);
tdiff = get_timevaldiff(&data.stime, &now);
host->time_waited += tdiff;
host->icmp_recv++;
icmp_recv++;
+ if (tdiff > host->rtmax)
+ host->rtmax = tdiff;
+ if (tdiff < host->rtmin)
+ host->rtmin = tdiff;
if(debug) {
- printf("%0.3f ms rtt from %s, outgoing ttl: %u, incoming ttl: %u\n",
+ printf("%0.3f ms rtt from %s, outgoing ttl: %u, incoming ttl: %u, max: %0.3f, min: %0.3f\n",
(float)tdiff / 1000, inet_ntoa(resp_addr.sin_addr),
- ttl, ip->ip_ttl);
+ ttl, ip->ip_ttl, (float)host->rtmax / 1000, (float)host->rtmin / 1000);
}
/* if we're in hostcheck mode, exit with limited printouts */
send_icmp_ping(int sock, struct rta_host *host)
{
static union {
- char *buf; /* re-use so we prevent leaks */
+ void *buf; /* re-use so we prevent leaks */
struct icmp *icp;
u_short *cksum_in;
} packet = { NULL };
packet.icp->icmp_type = ICMP_ECHO;
packet.icp->icmp_code = 0;
packet.icp->icmp_cksum = 0;
- packet.icp->icmp_id = pid;
- packet.icp->icmp_seq = host->id;
+ packet.icp->icmp_id = htons(pid);
+ packet.icp->icmp_seq = htons(host->id++);
packet.icp->icmp_cksum = icmp_checksum(packet.cksum_in, icmp_pkt_size);
+ if (debug > 2)
+ printf("Sending ICMP echo-request of len %u, id %u, seq %u, cksum 0x%X to host %s\n",
+ sizeof(data), ntohs(packet.icp->icmp_id), ntohs(packet.icp->icmp_seq), packet.icp->icmp_cksum, host->name);
+
len = sendto(sock, packet.buf, icmp_pkt_size, 0, (struct sockaddr *)addr,
sizeof(struct sockaddr));
}
static int
-recvfrom_wto(int sock, char *buf, unsigned int len, struct sockaddr *saddr,
+recvfrom_wto(int sock, void *buf, unsigned int len, struct sockaddr *saddr,
u_int *timo)
{
u_int slen;
host = list;
while(host) {
if(debug) puts("");
- printf("%srta=%0.3fms;%0.3f;%0.3f;0; %spl=%u%%;%u;%u;; ",
+ printf("%srta=%0.3fms;%0.3f;%0.3f;0; %spl=%u%%;%u;%u;; %srtmax=%0.3fms;;;; %srtmin=%0.3fms;;;; ",
(targets > 1) ? host->name : "",
host->rta / 1000, (float)warn.rta / 1000, (float)crit.rta / 1000,
- (targets > 1) ? host->name : "",
- host->pl, warn.pl, crit.pl);
+ (targets > 1) ? host->name : "", host->pl, warn.pl, crit.pl,
+ (targets > 1) ? host->name : "", (float)host->rtmax / 1000,
+ (targets > 1) ? host->name : "", (host->rtmin < DBL_MAX) ? (float)host->rtmin / 1000 : (float)0);
host = host->next;
}
if(!early) early = &prog_start;
/* if early > later we return 0 so as to indicate a timeout */
- if(early->tv_sec > early->tv_sec ||
+ if(early->tv_sec > later->tv_sec ||
(early->tv_sec == later->tv_sec && early->tv_usec > later->tv_usec))
{
return 0;
host->saddr_in.sin_family = AF_INET;
host->saddr_in.sin_addr.s_addr = in->s_addr;
+ host->rtmin = DBL_MAX;
+
if(!list) list = cursor = host;
else cursor->next = host;
/* this is silly, but it works */
if(mode == MODE_HOSTCHECK || mode == MODE_ALL) {
- printf("mode: %d\n", mode);
+ if(debug > 2) printf("mode: %d\n", mode);
continue;
}
break;
{
#if defined(SIOCGIFADDR)
struct ifreq ifr;
+ struct sockaddr_in ip;
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0';
if(ioctl(icmp_sock, SIOCGIFADDR, &ifr) == -1)
crash("Cannot determine IP address of interface %s", ifname);
- return ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
+ memcpy(&ip, &ifr.ifr_addr, sizeof(ip));
+ return ip.sin_addr.s_addr;
#else
errno = 0;
crash("Cannot get interface IP address on this platform.");
print_help(void)
{
- /*print_revision (progname, revision);*/ /* FIXME: Why? */
-
+ /*print_revision (progname);*/ /* FIXME: Why? */
+
printf ("Copyright (c) 2005 Andreas Ericsson <ae@op5.se>\n");
printf (COPYRIGHT, copyright, email);
-
+
printf ("\n\n");
-
+
print_usage ();
-
- printf (_(UT_HELP_VRSN));
-
+
+ printf (UT_HELP_VRSN);
+ printf (UT_EXTRA_OPTS);
+
printf (" %s\n", "-H");
printf (" %s\n", _("specify a target"));
printf (" %s\n", "-w");
printf (" %s", _("warning threshold (currently "));
- printf ("%0.3fms,%u%%)\n", (float)warn.rta / 1000 , warn.pl / 1000);
+ printf ("%0.3fms,%u%%)\n", (float)warn.rta / 1000, warn.pl);
printf (" %s\n", "-c");
printf (" %s", _("critical threshold (currently "));
- printf ("%0.3fms,%u%%)\n", (float)crit.rta, crit.pl);
+ printf ("%0.3fms,%u%%)\n", (float)crit.rta / 1000, crit.pl);
printf (" %s\n", "-s");
printf (" %s\n", _("specify a source IP address or device name"));
printf (" %s\n", "-n");
printf ("\n");
printf (" %s\n", "-l");
printf (" %s", _("TTL on outgoing packets (currently "));
- printf ("%u)", ttl);
+ printf ("%u)\n", ttl);
printf (" %s\n", "-t");
printf (" %s",_("timeout value (seconds, currently "));
printf ("%u)\n", timeout);
printf (" %s\n", "-b");
- printf (" %s\n", _("icmp packet size (currenly ignored)"));
+ printf (" %s\n", _("Number of icmp data bytes to send"));
+ printf (" %s %u + %d)\n", _("Packet size will be data bytes + icmp header (currently"),icmp_data_size, ICMP_MINLEN);
printf (" %s\n", "-v");
printf (" %s\n", _("verbose"));
printf ("\n");
- printf ("%s\n\n", _("The -H switch is optional. Naming a host (or several) to check is not."));
- printf ("%s\n", _("Threshold format for -w and -c is 200.25,60% for 200.25 msec RTA and 60%"));
- printf ("%s\n", _("packet loss. The default values should work well for most users."));
- printf ("%s\n", _("You can specify different RTA factors using the standardized abbreviations"));
- printf ("%s\n\n", _("us (microseconds), ms (milliseconds, default) or just plain s for seconds."));
+ printf ("%s\n", _("Notes:"));
+ printf (" %s\n", _("The -H switch is optional. Naming a host (or several) to check is not."));
+ printf ("\n");
+ printf (" %s\n", _("Threshold format for -w and -c is 200.25,60% for 200.25 msec RTA and 60%"));
+ printf (" %s\n", _("packet loss. The default values should work well for most users."));
+ printf (" %s\n", _("You can specify different RTA factors using the standardized abbreviations"));
+ printf (" %s\n", _("us (microseconds), ms (milliseconds, default) or just plain s for seconds."));
/* -d not yet implemented */
/* printf ("%s\n", _("Threshold format for -d is warn,crit. 12,14 means WARNING if >= 12 hops"));
printf ("%s\n", _("are spent and CRITICAL if >= 14 hops are spent."));
printf ("%s\n\n", _("NOTE: Some systems decrease TTL when forming ICMP_ECHOREPLY, others do not."));*/
- printf ("%s\n\n", _("The -v switch can be specified several times for increased verbosity."));
-
+ printf ("\n");
+ printf (" %s\n", _("The -v switch can be specified several times for increased verbosity."));
/* printf ("%s\n", _("Long options are currently unsupported."));
printf ("%s\n", _("Options marked with * require an argument"));
*/
- printf (_(UT_SUPPORT));
-
- printf (_(UT_NOWARRANTY));
+
+ printf (UT_SUPPORT);
}
print_usage (void)
{
printf (_("Usage:"));
- printf(" %s [options] [-H] host1 host2 hostn\n", progname);
+ printf(" %s [options] [-H] host1 host2 hostN\n", progname);
}