X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;ds=sidebyside;f=plugins%2Fcheck_smtp.c;h=7562c4c67550fcd8794ac9cffb5fef624bf2345b;hb=575e82a500d1b097b70883a8e50f4b92451d8270;hp=4e5d3c81c80ce9ad501403d3bdc4ee151d9dc157;hpb=e0b39ddb7bf047e83b2b743e4de5287757dd0884;p=nagiosplug.git diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c index 4e5d3c8..7562c4c 100644 --- a/plugins/check_smtp.c +++ b/plugins/check_smtp.c @@ -1,23 +1,5 @@ /****************************************************************************** * -* CHECK_SMTP.C -* -* Program: SMTP plugin for Nagios -* License: GPL -* Copyright (c) 1999 Ethan Galstad (nagios@nagios.org) -* -* $Id$ -* -* Description: -* -* This plugin will attempt to open an SMTP connection with the host. -* Successul connects return STATE_OK, refusals and timeouts return -* STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful -* connects, but incorrect reponse messages from the host result in -* STATE_WARNING return values. -* -* 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 @@ -34,109 +16,137 @@ * *****************************************************************************/ +const char *progname = "check_smtp"; +const char *revision = "$Revision$"; +const char *copyright = "1999-2003"; +const char *authors = "Nagios Plugin Development Team"; +const char *email = "nagiosplug-devel@lists.sourceforge.net"; + +const char *summary = "\ +This plugin will attempt to open an SMTP connection with the host.\n"; + +const char *description = "\ +Successul connects return STATE_OK, refusals and timeouts return\n\ +STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful\n\ +connects, but incorrect reponse messages from the host result in\n\ +STATE_WARNING return values.\n"; + +const char *option_summary = "\ +-H host [-p port] [-e expect] [-C command] [-f from addr]\n\ + [-w warn] [-c crit] [-t timeout] [-n] [-v] [-4|-6]"; + +const char *options = "\ + -H, --hostname=STRING or IPADDRESS\n\ + Check server on the indicated host\n\ + -4, --use-ipv4\n\ + Use IPv4 protocol\n\ + -6, --use-ipv6\n\ + Use IPv6 protocol\n\ + -p, --port=INTEGER\n\ + Make connection on the indicated port (default: %d)\n\ + -e, --expect=STRING\n\ + String to expect in first line of server response (default: '%s')\n\ + -n, nocommand\n\ + Suppress SMTP command\n\ + -C, --command=STRING\n\ + SMTP command (default: '%s')\n\ + -f, --from=STRING\n\ + FROM-address to include in MAIL command, required by Exchange 2000\n\ + (default: '%s')\n\ + -w, --warning=INTEGER\n\ + Seconds necessary to result in a warning status\n\ + -c, --critical=INTEGER\n\ + Seconds necessary to result in a critical status\n\ + -t, --timeout=INTEGER\n\ + Seconds before connection attempt times out (default: %d)\n\ + -v, --verbose\n\ + Print extra information (command-line use only)\n\ + -h, --help\n\ + Print detailed help screen\n\ + -V, --version\n\ + Print version information\n\n"; + +enum { + SMTP_PORT = 25 +}; +const char *SMTP_EXPECT = "220"; +const char *SMTP_HELO = "HELO "; +const char *SMTP_QUIT = "QUIT\r\n"; + #include "config.h" #include "common.h" #include "netutils.h" #include "utils.h" -#define PROGNAME "check_smtp" - -#define SMTP_PORT 25 -#define SMTP_EXPECT "220" -#define SMTP_HELO "HELO " - -/* sendmail will syslog a "NOQUEUE" error if session does not attempt - * to do something useful. This can be prevented by giving a command - * even if syntax is illegal (MAIL requires a FROM:<...> argument) - * You can disable sending DUMMYCMD by undefining SMTP_USE_DUMMYCMD. - * - * According to rfc821 you can include a null reversepath in the from command - * - but a log message is generated on the smtp server. - * - * Use the -f option to provide a FROM address - */ - -#define SMTP_DUMMYCMD "MAIL " -#define SMTP_USE_DUMMYCMD 1 -#define SMTP_QUIT "QUIT\r\n" - int process_arguments (int, char **); -int call_getopt (int, char **); int validate_arguments (void); -int check_disk (int usp, int free_disk); void print_help (void); void print_usage (void); int server_port = SMTP_PORT; char *server_address = NULL; char *server_expect = NULL; +int smtp_use_dummycmd = 1; +char *mail_command = "MAIL "; char *from_arg = " "; int warning_time = 0; int check_warning_time = FALSE; int critical_time = 0; int check_critical_time = FALSE; -int verbose = FALSE; +int verbose = 0; int main (int argc, char **argv) { int sd; - int result; + double elapsed_time; + int result = STATE_UNKNOWN; char buffer[MAX_INPUT_BUFFER] = ""; - char helocmd[255] = SMTP_HELO ; - char from_str[255] = SMTP_DUMMYCMD ; - char myhostname[248]; - + char *from_str = NULL; + char *helocmd = NULL; + struct timeval tv; if (process_arguments (argc, argv) != OK) usage ("Invalid command arguments supplied\n"); /* initialize the HELO command with the localhostname */ - gethostname(myhostname, sizeof(myhostname)); - strcat(helocmd, myhostname); - strcat(helocmd, "\r\n"); +#ifndef HOST_MAX_BYTES +#define HOST_MAX_BYTES 255 +#endif + helocmd = malloc (HOST_MAX_BYTES); + gethostname(helocmd, HOST_MAX_BYTES); + asprintf (&helocmd, "%s%s%s", SMTP_HELO, helocmd, "\r\n"); /* initialize the MAIL command with optional FROM command */ - if (from_arg) { - strcat(from_str, "FROM: "); - strcat(from_str, from_arg); - } - /* terminate line with a CRLF */ - strcat(from_str, "\r\n"); - - if (verbose == TRUE){ - printf ("FROMCMD: %s\n", from_str); - } + asprintf (&from_str, "%sFROM: %s%s", mail_command, from_arg, "\r\n"); - + if (verbose) + printf ("FROMCMD: %s\n", from_str); /* initialize alarm signal handling */ - signal (SIGALRM, socket_timeout_alarm_handler); + (void) signal (SIGALRM, socket_timeout_alarm_handler); /* set socket timeout */ - alarm (socket_timeout); + (void) alarm (socket_timeout); + + /* start timer */ + gettimeofday (&tv, NULL); /* try to connect to the host at the given port number */ - time (&start_time); result = my_tcp_connect (server_address, server_port, &sd); /* we connected, so close connection before exiting */ if (result == STATE_OK) { - /* watch for the SMTP connection string */ - result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0); - - /* strip the buffer of carriage returns */ - strip (buffer); - + /* watch for the SMTP connection string and */ /* return a WARNING status if we couldn't read any data */ - if (result == -1) { + if (recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0) == -1) { printf ("recv() failed\n"); result = STATE_WARNING; } - else { - + /* strip the buffer of carriage returns */ + strip (buffer); /* make sure we find the response we are looking for */ if (!strstr (buffer, server_expect)) { if (server_port == SMTP_PORT) @@ -146,51 +156,60 @@ main (int argc, char **argv) server_port); result = STATE_WARNING; } + } - else { + /* send the HELO command */ + send(sd, helocmd, strlen(helocmd), 0); - time (&end_time); + /* allow for response to helo command to reach us */ + recv(sd, buffer, MAX_INPUT_BUFFER-1, 0); + + /* sendmail will syslog a "NOQUEUE" error if session does not attempt + * to do something useful. This can be prevented by giving a command + * even if syntax is illegal (MAIL requires a FROM:<...> argument) + * + * According to rfc821 you can include a null reversepath in the from command + * - but a log message is generated on the smtp server. + * + * You can disable sending mail_command with '--nocommand' + * Use the -f option to provide a FROM address + */ + if (smtp_use_dummycmd) { - result = STATE_OK; + send(sd, from_str, strlen(from_str), 0); - if (check_critical_time == TRUE - && (end_time - start_time) > critical_time) result = - STATE_CRITICAL; - else if (check_warning_time == TRUE - && (end_time - start_time) > warning_time) result = - STATE_WARNING; + /* allow for response to mail_command to reach us */ + recv(sd, buffer, MAX_INPUT_BUFFER-1, 0); - if (verbose == TRUE) - printf ("SMTP %s - %d sec. response time, %s\n", - state_text (result), (int) (end_time - start_time), buffer); - else - printf ("SMTP %s - %d second response time\n", state_text (result), - (int) (end_time - start_time)); - } - } + if (verbose) + printf("DUMMYCMD: %s\n%s\n",from_str,buffer); - /* close the connection */ - /* first send the HELO command */ - send(sd,helocmd,strlen(helocmd),0); - /* allow for response to helo command to reach us */ - recv(sd,buffer,MAX_INPUT_BUFFER-1,0); - -#ifdef SMTP_USE_DUMMYCMD - send(sd,from_str,strlen(from_str),0); - /* allow for response to DUMMYCMD to reach us */ - recv(sd,buffer,MAX_INPUT_BUFFER-1,0); - if (verbose == TRUE) - printf("DUMMYCMD: %s\n%s\n",from_str,buffer); -#endif /* SMTP_USE_DUMMYCMD */ + } /* smtp_use_dummycmd */ - /* finally close the connection */ + /* tell the server we're done */ send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0); + + /* finally close the connection */ close (sd); } /* reset the alarm */ alarm (0); + elapsed_time = delta_time (tv); + + if (check_critical_time && elapsed_time > (double) critical_time) + result = STATE_CRITICAL; + else if (check_warning_time && elapsed_time > (double) warning_time) + result = STATE_WARNING; + + if (verbose) + printf ("SMTP %s - %.3f sec. response time, %s|time=%.3f\n", + state_text (result), elapsed_time, buffer, elapsed_time); + else + printf ("SMTP %s - %.3f second response time|time=%.3f\n", + state_text (result), elapsed_time, elapsed_time); + return result; } @@ -205,96 +224,44 @@ process_arguments (int argc, char **argv) { int c; - if (argc < 2) - return ERROR; - - for (c = 1; c < argc; c++) { - if (strcmp ("-to", argv[c]) == 0) - strcpy (argv[c], "-t"); - else if (strcmp ("-wt", argv[c]) == 0) - strcpy (argv[c], "-w"); - else if (strcmp ("-ct", argv[c]) == 0) - strcpy (argv[c], "-c"); - } - - - - c = 0; - while ((c += (call_getopt (argc - c, &argv[c]))) < argc) { - - if (is_option (argv[c])) - continue; - - if (server_address == NULL) { - if (is_host (argv[c])) { - server_address = argv[c]; - } - else { - usage ("Invalid host name"); - } - } - } - - if (server_address == NULL) - server_address = strscpy (NULL, "127.0.0.1"); - - if (server_expect == NULL) - server_expect = strscpy (NULL, SMTP_EXPECT); - - return validate_arguments (); -} - - - - - - -int -call_getopt (int argc, char **argv) -{ - int c, i = 0; - -#ifdef HAVE_GETOPT_H int option_index = 0; static struct option long_options[] = { {"hostname", required_argument, 0, 'H'}, {"expect", required_argument, 0, 'e'}, {"critical", required_argument, 0, 'c'}, {"warning", required_argument, 0, 'w'}, + {"timeout", required_argument, 0, 't'}, {"port", required_argument, 0, 'p'}, {"from", required_argument, 0, 'f'}, + {"command", required_argument, 0, 'C'}, + {"nocommand", required_argument, 0, 'n'}, {"verbose", no_argument, 0, 'v'}, {"version", no_argument, 0, 'V'}, + {"use-ipv4", no_argument, 0, '4'}, + {"use-ipv6", no_argument, 0, '6'}, {"help", no_argument, 0, 'h'}, {0, 0, 0, 0} }; -#endif - while (1) { -#ifdef HAVE_GETOPT_H - c = - getopt_long (argc, argv, "+hVvt:p:f:e:c:w:H:", long_options, - &option_index); -#else - c = getopt (argc, argv, "+?hVvt:p:f:e:c:w:H:"); -#endif + if (argc < 2) + return ERROR; + + for (c = 1; c < argc; c++) { + if (strcmp ("-to", argv[c]) == 0) + strcpy (argv[c], "-t"); + else if (strcmp ("-wt", argv[c]) == 0) + strcpy (argv[c], "-w"); + else if (strcmp ("-ct", argv[c]) == 0) + strcpy (argv[c], "-c"); + } - i++; + while (1) { + c = getopt_long (argc, argv, "+hVv46t:p:f:e:c:w:H:C:", + long_options, &option_index); - if (c == -1 || c == EOF || c == 1) + if (c == -1 || c == EOF) break; - switch (c) { - case 't': - case 'p': - case 'e': - case 'f': - case 'c': - case 'w': - case 'H': - i++; - } - switch (c) { case 'H': /* hostname */ if (is_host (optarg)) { @@ -318,6 +285,13 @@ call_getopt (int argc, char **argv) case 'e': /* server expect string on 220 */ server_expect = optarg; break; + case 'C': /* server expect string on 220 */ + mail_command = optarg; + smtp_use_dummycmd = 1; + break; + case 'n': /* server expect string on 220 */ + smtp_use_dummycmd = 0; + break; case 'c': /* critical time threshold */ if (is_intnonneg (optarg)) { critical_time = atoi (optarg); @@ -337,7 +311,7 @@ call_getopt (int argc, char **argv) } break; case 'v': /* verbose */ - verbose = TRUE; + verbose++; break; case 't': /* timeout */ if (is_intnonneg (optarg)) { @@ -347,8 +321,18 @@ call_getopt (int argc, char **argv) usage ("Time interval must be a nonnegative integer\n"); } break; + case '4': + address_family = AF_INET; + break; + case '6': +#ifdef USE_IPV6 + address_family = AF_INET6; +#else + usage ("IPv6 support not available\n"); +#endif + break; case 'V': /* version */ - print_revision (PROGNAME, "$Revision$"); + print_revision (progname, revision); exit (STATE_OK); case 'h': /* help */ print_help (); @@ -357,7 +341,24 @@ call_getopt (int argc, char **argv) usage ("Invalid argument\n"); } } - return i; + + c = optind; + if (server_address == NULL) { + if (argv[c]) { + if (is_host (argv[c])) + server_address = argv[c]; + else + usage ("Invalid host name"); + } + else { + asprintf (&server_address, "127.0.0.1"); + } + } + + if (server_expect == NULL) + asprintf (&server_expect, SMTP_EXPECT); + + return validate_arguments (); } @@ -377,34 +378,13 @@ validate_arguments (void) void print_help (void) { - print_revision (PROGNAME, "$Revision$"); - printf - ("Copyright (c) 2000 Ethan Galstad/Karl DeBisschop\n\n" - "This plugin test the SMTP service on the specified host.\n\n"); + print_revision (progname, revision); + printf ("Copyright (c) %s %s\n\t<%s>\n\n%s\n", + copyright, authors, email, summary); print_usage (); - printf - ("\nOptions:\n" - " -H, --hostname=STRING or IPADDRESS\n" - " Check server on the indicated host\n" - " -p, --port=INTEGER\n" - " Make connection on the indicated port (default: %d)\n" - " -e, --expect=STRING\n" - " String to expect in first line of server response (default: %s)\n" - " -f, --from=STRING\n" - " from address to include in MAIL command (default NULL, Exchange2000 requires one)\n" - " -w, --warning=INTEGER\n" - " Seconds necessary to result in a warning status\n" - " -c, --critical=INTEGER\n" - " Seconds necessary to result in a critical status\n" - " -t, --timeout=INTEGER\n" - " Seconds before connection attempt times out (default: %d)\n" - " -v, --verbose\n" - " Print extra information (command-line use only)\n" - " -h, --help\n" - " Print detailed help screen\n" - " -V, --version\n" - " Print version information\n\n", - SMTP_PORT, SMTP_EXPECT, DEFAULT_SOCKET_TIMEOUT); + printf ("\nOptions:\n"); + printf (options, SMTP_PORT, SMTP_EXPECT, mail_command, from_arg, + DEFAULT_SOCKET_TIMEOUT); support (); } @@ -415,8 +395,8 @@ print_help (void) void print_usage (void) { - printf - ("Usage: %s -H host [-e expect] [-p port] [-f from addr] [-w warn] [-c crit] [-t timeout] [-v]\n" - " %s --help\n" - " %s --version\n", PROGNAME, PROGNAME, PROGNAME); + printf ("Usage: %s %s\n" + " %s --help\n" + " %s --version\n", + progname, option_summary, progname, progname); }