X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=plugins%2Fcheck_tcp.c;h=1057fdc66889f052c22e8781a7ba9a390696d66c;hb=3bae38aef895b93b29836c2f15c9dfd388562e11;hp=bef0e752c788cfb5148faca49ddd7d8c90fd2ca1;hpb=44a321cb8a42d6c0ea2d96a1086a17f2134c89cc;p=nagiosplug.git diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c index bef0e75..1057fdc 100644 --- a/plugins/check_tcp.c +++ b/plugins/check_tcp.c @@ -1,32 +1,63 @@ -/****************************************************************************** - * - * This file is part of the Nagios Plugins. - * - * Copyright (c) 1999 Ethan Galstad - * - * The Nagios Plugins are free software; you can redistribute them - * and/or modify them 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. - * - * $Id$ - * - *****************************************************************************/ - -#define PROGRAM check_tcp -#define DESCRIPTION "Check a TCP port" -#define AUTHOR "Ethan Galstad" -#define EMAIL "nagios@nagios.org" -#define COPYRIGHTDATE "1999" +/***************************************************************************** +* +* 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. +* +*****************************************************************************/ + +/* progname changes depending on symlink called */ +char *progname = "check_tcp"; +const char *revision = "$Revision$"; +const char *copyright = "2002-2003"; +const char *authors = "Nagios Plugin Development Team"; +const char *email = "nagiosplug-devel@lists.sourceforge.net"; + +const char *summary = "\ +This plugin tests %s connections with the specified host.\n"; + +const char *option_summary = "\ +-H host -p port [-w warn_time] [-c crit_time] [-s send]\n\ + [-e expect] [-W wait] [-t to_sec] [-r refuse_state] [-v]\n"; + +const char *options = "\ + -H, --hostname=ADDRESS\n\ + Host name argument for servers using host headers (use numeric\n\ + address if possible to bypass DNS lookup).\n\ + -p, --port=INTEGER\n\ + Port number\n\ + -s, --send=STRING\n\ + String to send to the server\n\ + -e, --expect=STRING\n\ + String to expect in server response\n\ + -W, --wait=INTEGER\n\ + Seconds to wait between sending string and polling for response\n\ + -w, --warning=DOUBLE\n\ + Response time to result in warning status (seconds)\n\ + -c, --critical=DOUBLE\n\ + Response time to result in critical status (seconds)\n\ + -t, --timeout=INTEGER\n\ + Seconds before connection times out (default: %d)\n\ + -r, --refuse=ok|warn|crit\n\ + Accept tcp refusals with states ok, warn, crit (default: crit)\n\ + -v\n\ + Show details for command-line debugging (do not use with nagios server)\n"; + +const char *standard_options = "\ + -h, --help\n\ + Print detailed help screen\n\ + -V, --version\n\ + Print version information\n\n"; #include "config.h" #include "common.h" @@ -34,21 +65,21 @@ #include "utils.h" #ifdef HAVE_SSL_H -#include -#include -#include -#include -#include -#include -#endif - -#ifdef HAVE_OPENSSL_SSL_H -#include -#include -#include -#include -#include -#include +# include +# include +# include +# include +# include +# include +#else +# ifdef HAVE_OPENSSL_SSL_H +# include +# include +# include +# include +# include +# include +# endif #endif #ifdef HAVE_SSL @@ -57,14 +88,17 @@ SSL *ssl; int connect_SSL (void); #endif -#define TCP_PROTOCOL 1 -#define UDP_PROTOCOL 2 +enum { + TCP_PROTOCOL = 1, + UDP_PROTOCOL = 2, + MAXBUF = 1024 +}; int process_arguments (int, char **); void print_usage (void); void print_help (void); +int my_recv (void); -char *PROGNAME = NULL; char *SERVICE = NULL; char *SEND = NULL; char *EXPECT = NULL; @@ -83,27 +117,27 @@ int warn_codes_count = 0; char **crit_codes = NULL; int crit_codes_count = 0; int delay = 0; -int warning_time = 0; +double warning_time = 0; int check_warning_time = FALSE; -int critical_time = 0; +double critical_time = 0; int check_critical_time = FALSE; +double elapsed_time = 0; int verbose = FALSE; int use_ssl = FALSE; -int sd; +int sd = 0; +char *buffer = ""; int main (int argc, char **argv) { int result; int i; - char buffer[MAX_INPUT_BUFFER] = ""; - char *status = NULL; - char *output = NULL; - char *ptr = NULL; + char *status = ""; + struct timeval tv; if (strstr (argv[0], "check_udp")) { - PROGNAME = strscpy (PROGNAME, "check_udp"); - SERVICE = strscpy (SERVICE, "UDP"); + progname = strdup ("check_udp"); + SERVICE = strdup ("UDP"); SEND = NULL; EXPECT = NULL; QUIT = NULL; @@ -111,8 +145,8 @@ main (int argc, char **argv) PORT = 0; } else if (strstr (argv[0], "check_tcp")) { - PROGNAME = strscpy (PROGNAME, "check_tcp"); - SERVICE = strscpy (SERVICE, "TCP"); + progname = strdup ("check_tcp"); + SERVICE = strdup ("TCP"); SEND = NULL; EXPECT = NULL; QUIT = NULL; @@ -120,63 +154,73 @@ main (int argc, char **argv) PORT = 0; } else if (strstr (argv[0], "check_ftp")) { - PROGNAME = strscpy (PROGNAME, "check_ftp"); - SERVICE = strscpy (SERVICE, "FTP"); + progname = strdup ("check_ftp"); + SERVICE = strdup ("FTP"); SEND = NULL; - EXPECT = strscpy (EXPECT, "220"); - QUIT = strscpy (QUIT, "QUIT\r\n"); + EXPECT = strdup ("220"); + QUIT = strdup ("QUIT\r\n"); PROTOCOL = TCP_PROTOCOL; PORT = 21; } else if (strstr (argv[0], "check_smtp")) { - PROGNAME = strscpy (PROGNAME, "check_smtp"); - SERVICE = strscpy (SERVICE, "SMTP"); + progname = strdup ("check_smtp"); + SERVICE = strdup ("SMTP"); SEND = NULL; - EXPECT = strscpy (EXPECT, "220"); - QUIT = strscpy (QUIT, "QUIT\r\n"); + EXPECT = strdup ("220"); + QUIT = strdup ("QUIT\r\n"); PROTOCOL = TCP_PROTOCOL; PORT = 25; } else if (strstr (argv[0], "check_pop")) { - PROGNAME = strscpy (PROGNAME, "check_pop"); - SERVICE = strscpy (SERVICE, "POP"); + progname = strdup ("check_pop"); + SERVICE = strdup ("POP"); SEND = NULL; - EXPECT = strscpy (EXPECT, "110"); - QUIT = strscpy (QUIT, "QUIT\r\n"); + EXPECT = strdup ("+OK"); + QUIT = strdup ("QUIT\r\n"); PROTOCOL = TCP_PROTOCOL; PORT = 110; } else if (strstr (argv[0], "check_imap")) { - PROGNAME = strscpy (PROGNAME, "check_imap"); - SERVICE = strscpy (SERVICE, "IMAP"); + progname = strdup ("check_imap"); + SERVICE = strdup ("IMAP"); SEND = NULL; - EXPECT = strscpy (EXPECT, "* OK"); - QUIT = strscpy (QUIT, "a1 LOGOUT\r\n"); + EXPECT = strdup ("* OK"); + QUIT = strdup ("a1 LOGOUT\r\n"); PROTOCOL = TCP_PROTOCOL; PORT = 143; } #ifdef HAVE_SSL else if (strstr(argv[0],"check_simap")) { - PROGNAME=strscpy(PROGNAME,"check_simap"); - SERVICE=strscpy(SERVICE,"SIMAP"); + progname = strdup ("check_simap"); + SERVICE = strdup ("SIMAP"); SEND=NULL; - EXPECT=strscpy(EXPECT,"* OK"); - QUIT=strscpy(QUIT,"a1 LOGOUT\n"); + EXPECT = strdup ("* OK"); + QUIT = strdup ("a1 LOGOUT\r\n"); PROTOCOL=TCP_PROTOCOL; use_ssl=TRUE; PORT=993; } + else if (strstr(argv[0],"check_spop")) { + progname = strdup ("check_spop"); + SERVICE = strdup ("SPOP"); + SEND=NULL; + EXPECT = strdup ("+OK"); + QUIT = strdup ("QUIT\r\n"); + PROTOCOL=TCP_PROTOCOL; + use_ssl=TRUE; + PORT=995; + } #endif else if (strstr (argv[0], "check_nntp")) { - PROGNAME = strscpy (PROGNAME, "check_nntp"); - SERVICE = strscpy (SERVICE, "NNTP"); + progname = strdup ("check_nntp"); + SERVICE = strdup ("NNTP"); SEND = NULL; EXPECT = NULL; server_expect = realloc (server_expect, ++server_expect_count); - server_expect[server_expect_count - 1] = strscpy (EXPECT, "200"); + asprintf (&server_expect[server_expect_count - 1], "200"); server_expect = realloc (server_expect, ++server_expect_count); - server_expect[server_expect_count - 1] = strscpy (NULL, "201"); - QUIT = strscpy (QUIT, "QUIT\r\n"); + asprintf (&server_expect[server_expect_count - 1], "201"); + asprintf (&QUIT, "QUIT\r\n"); PROTOCOL = TCP_PROTOCOL; PORT = 119; } @@ -184,7 +228,7 @@ main (int argc, char **argv) usage ("ERROR: Generic check_tcp called with unknown service\n"); } - server_address = strscpy (NULL, "127.0.0.1"); + server_address = strdup ("127.0.0.1"); server_port = PORT; server_send = SEND; server_quit = QUIT; @@ -194,7 +238,7 @@ main (int argc, char **argv) /* use default expect if none listed in process_arguments() */ if (EXPECT && server_expect_count == 0) { - server_expect = malloc (1); + server_expect = malloc (++server_expect_count); server_expect[server_expect_count - 1] = EXPECT; } @@ -205,7 +249,7 @@ main (int argc, char **argv) alarm (socket_timeout); /* try to connect to the host at the given port number */ - time (&start_time); + gettimeofday (&tv, NULL); #ifdef HAVE_SSL if (use_ssl) result = connect_SSL (); @@ -214,7 +258,8 @@ main (int argc, char **argv) { if (PROTOCOL == UDP_PROTOCOL) result = my_udp_connect (server_address, server_port, &sd); - else /* default is TCP */ + else + /* default is TCP */ result = my_tcp_connect (server_address, server_port, &sd); } @@ -222,45 +267,45 @@ main (int argc, char **argv) return STATE_CRITICAL; if (server_send != NULL) { /* Something to send? */ - snprintf (buffer, MAX_INPUT_BUFFER - 1, "%s\r\n", server_send); - buffer[MAX_INPUT_BUFFER - 1] = 0; + asprintf (&server_send, "%s\r\n", server_send); #ifdef HAVE_SSL if (use_ssl) - SSL_write(ssl,buffer,strlen(buffer)); + SSL_write(ssl, server_send, strlen (server_send)); else #endif - send (sd, buffer, strlen (buffer), 0); + send (sd, server_send, strlen (server_send), 0); } if (delay > 0) { - start_time = start_time + delay; + tv.tv_sec += delay; sleep (delay); } if (server_send || server_expect_count > 0) { + buffer = malloc (MAXBUF); + memset (buffer, '\0', MAXBUF); /* watch for the expect string */ -#ifdef HAVE_SSL - if (use_ssl && SSL_read (ssl, buffer, MAX_INPUT_BUFFER - 1)>=0) - status = strscat(status,buffer); - else -#endif - { - if (recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0) >= 0) - status = strscat (status, buffer); - } - strip (status); + while ((i = my_recv ()) > 0) { + buffer[i] = '\0'; + asprintf (&status, "%s%s", status, buffer); + if (buffer[i-2] == '\r' && buffer[i-1] == '\n') + break; + } /* return a CRITICAL status if we couldn't read any data */ if (status == NULL) terminate (STATE_CRITICAL, "No data received from host\n"); + strip (status); + if (status && verbose) printf ("%s\n", status); if (server_expect_count > 0) { for (i = 0;; i++) { - printf ("%d %d\n", i, server_expect_count); + if (verbose) + printf ("%d %d\n", i, server_expect_count); if (i >= server_expect_count) terminate (STATE_WARNING, "Invalid response from host\n"); if (strstr (status, server_expect[i])) @@ -269,47 +314,51 @@ main (int argc, char **argv) } } - if (server_quit) + if (server_quit != NULL) { #ifdef HAVE_SSL if (use_ssl) { - SSL_write (ssl, QUIT, strlen (QUIT)); + SSL_write (ssl, server_quit, strlen (server_quit)); SSL_shutdown (ssl); - SSL_free (ssl); - SSL_CTX_free (ctx); + SSL_free (ssl); + SSL_CTX_free (ctx); + } + else { +#endif + send (sd, server_quit, strlen (server_quit), 0); +#ifdef HAVE_SSL } - else #endif - send (sd, server_quit, strlen (server_quit), 0); + } /* close the connection */ - close (sd); + if (sd) + close (sd); - time (&end_time); + elapsed_time = delta_time (tv); - if (check_critical_time == TRUE && (end_time - start_time) > critical_time) + if (check_critical_time == TRUE && elapsed_time > critical_time) result = STATE_CRITICAL; - else if (check_warning_time == TRUE - && (end_time - start_time) > warning_time) result = STATE_WARNING; + else if (check_warning_time == TRUE && elapsed_time > warning_time) + result = STATE_WARNING; /* reset the alarm */ alarm (0); printf - ("%s %s - %d second response time on port %d", + ("%s %s%s - %.3f second response time on port %d", SERVICE, - state_text (result), (int) (end_time - start_time), server_port); + state_text (result), + (was_refused) ? " (refused)" : "", + elapsed_time, server_port); - if (status) - printf (" [%s]\n", status); - else - printf ("\n"); + if (status && strlen(status) > 0) + printf (" [%s]", status); + + printf ("|time=%.3f\n", elapsed_time); return result; } - - - - + @@ -319,7 +368,6 @@ process_arguments (int argc, char **argv) { int c; -#ifdef HAVE_GETOPT_H int option_index = 0; static struct option long_options[] = { {"hostname", required_argument, 0, 'H'}, @@ -334,12 +382,12 @@ process_arguments (int argc, char **argv) {"expect", required_argument, 0, 'e'}, {"quit", required_argument, 0, 'q'}, {"delay", required_argument, 0, 'd'}, + {"refuse", required_argument, 0, 'r'}, {"verbose", no_argument, 0, 'v'}, {"version", no_argument, 0, 'V'}, {"help", no_argument, 0, 'h'}, {0, 0, 0, 0} }; -#endif if (argc < 2) usage ("No arguments found\n"); @@ -362,46 +410,41 @@ process_arguments (int argc, char **argv) } while (1) { -#ifdef HAVE_GETOPT_H - c = - getopt_long (argc, argv, "+hVvH:s:e:q:c:w:t:p:C:W:d:S", long_options, + c = getopt_long (argc, argv, "+hVvH:s:e:q:c:w:t:p:C:W:d:Sr:", long_options, &option_index); -#else - c = getopt (argc, argv, "+hVvH:s:e:q:c:w:t:p:C:W:d:S"); -#endif if (c == -1 || c == EOF || c == 1) break; switch (c) { case '?': /* print short usage statement if args not parsable */ - printf ("%s: Unknown argument: %s\n\n", my_basename (argv[0]), optarg); + printf ("%s: Unknown argument: %s\n\n", progname, optarg); print_usage (); exit (STATE_UNKNOWN); case 'h': /* help */ print_help (); exit (STATE_OK); case 'V': /* version */ - print_revision (PROGNAME, "$Revision$"); + print_revision (progname, "$Revision$"); exit (STATE_OK); case 'v': /* verbose mode */ verbose = TRUE; break; case 'H': /* hostname */ if (is_host (optarg) == FALSE) - usage ("Invalid host name/address\n"); + usage2 ("invalid host name or address", optarg); server_address = optarg; break; case 'c': /* critical */ if (!is_intnonneg (optarg)) usage ("Critical threshold must be a nonnegative integer\n"); - critical_time = atoi (optarg); + critical_time = strtod (optarg, NULL); check_critical_time = TRUE; break; case 'w': /* warning */ if (!is_intnonneg (optarg)) usage ("Warning threshold must be a nonnegative integer\n"); - warning_time = atoi (optarg); + warning_time = strtod (optarg, NULL); check_warning_time = TRUE; break; case 'C': @@ -425,7 +468,7 @@ process_arguments (int argc, char **argv) case 's': server_send = optarg; break; - case 'e': + case 'e': /* expect string (may be repeated) */ EXPECT = NULL; if (server_expect_count == 0) server_expect = malloc (++server_expect_count); @@ -436,6 +479,16 @@ process_arguments (int argc, char **argv) case 'q': server_quit = optarg; break; + case 'r': + if (!strncmp(optarg,"ok",2)) + econn_refuse_state = STATE_OK; + else if (!strncmp(optarg,"warn",4)) + econn_refuse_state = STATE_WARNING; + else if (!strncmp(optarg,"crit",4)) + econn_refuse_state = STATE_CRITICAL; + else + usage ("Refuse mut be one of ok, warn, crit\n"); + break; case 'd': if (is_intpos (optarg)) delay = atoi (optarg); @@ -457,58 +510,32 @@ process_arguments (int argc, char **argv) return OK; } - - + void -print_usage (void) +print_help (void) { - printf - ("Usage: %s -H host -p port [-w warn_time] [-c crit_time] [-s send]\n" - " [-e expect] [-W wait] [-t to_sec] [-v]\n", PROGNAME); + print_revision (progname, revision); + printf ("Copyright (c) %s %s\n\t<%s>\n\n", copyright, authors, email); + printf (summary, SERVICE); + print_usage (); + printf ("\nOptions:\n"); + printf (options, DEFAULT_SOCKET_TIMEOUT); + printf (standard_options); + support (); } - - - - void -print_help (void) +print_usage (void) { - print_revision (PROGNAME, "$Revision$"); - printf - ("Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)\n\n" - "This plugin tests %s connections with the specified host.\n\n", - SERVICE); - print_usage (); - printf - ("Options:\n" - " -H, --hostname=ADDRESS\n" - " Host name argument for servers using host headers (use numeric\n" - " address if possible to bypass DNS lookup).\n" - " -p, --port=INTEGER\n" - " Port number\n" - " -s, --send=STRING\n" - " String to send to the server\n" - " -e, --expect=STRING\n" - " String to expect in server response" - " -W, --wait=INTEGER\n" - " Seconds to wait between sending string and polling for response\n" - " -w, --warning=INTEGER\n" - " Response time to result in warning status (seconds)\n" - " -c, --critical=INTEGER\n" - " Response time to result in critical status (seconds)\n" - " -t, --timeout=INTEGER\n" - " Seconds before connection times out (default: %d)\n" - " -v" - " Show details for command-line debugging (do not use with nagios server)\n" - " -h, --help\n" - " Print detailed help screen\n" - " -V, --version\n" - " Print version information\n", DEFAULT_SOCKET_TIMEOUT); + printf ("Usage: %s %s\n", progname, option_summary); + printf (" %s (-h|--help)\n", progname); + printf (" %s (-V|--version)\n", progname); } + + #ifdef HAVE_SSL @@ -537,7 +564,7 @@ connect_SSL (void) time (&start_time); /* Make TCP connection */ - if (my_tcp_connect (server_address, server_port, &sd) == STATE_OK) + if (my_tcp_connect (server_address, server_port, &sd) == STATE_OK && was_refused == FALSE) { /* Do the SSL handshake */ if ((ssl = SSL_new (ctx)) != NULL) @@ -561,3 +588,23 @@ connect_SSL (void) } #endif + + +int +my_recv (void) +{ + int i; + +#ifdef HAVE_SSL + if (use_ssl) { + i = SSL_read (ssl, buffer, MAXBUF - 1); + } + else { +#endif + i = read (sd, buffer, MAXBUF - 1); +#ifdef HAVE_SSL + } +#endif + + return i; +}