diff options
Diffstat (limited to 'plugins/check_smtp.c')
| -rw-r--r-- | plugins/check_smtp.c | 179 |
1 files changed, 98 insertions, 81 deletions
diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c index 5e980bcc..04df7e68 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 @@ -34,32 +16,64 @@ * *****************************************************************************/ +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] + [-w warn] [-c crit] [-t timeout] [-n] [-v]"; + +const char *options = "\ + -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\ + -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" -const char *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 validate_arguments (void); void print_help (void); @@ -68,6 +82,8 @@ 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; @@ -98,7 +114,7 @@ main (int argc, char **argv) asprintf (&helocmd, "%s%s%s", SMTP_HELO, helocmd, "\r\n"); /* initialize the MAIL command with optional FROM command */ - asprintf (&from_str, "%sFROM: %s%s", SMTP_DUMMYCMD, from_arg, "\r\n"); + asprintf (&from_str, "%sFROM: %s%s", mail_command, from_arg, "\r\n"); if (verbose) printf ("FROMCMD: %s\n", from_str); @@ -144,15 +160,27 @@ main (int argc, char **argv) /* 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); + /* 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) { - /* allow for response to DUMMYCMD to reach us */ - recv(sd, buffer, MAX_INPUT_BUFFER-1, 0); + send(sd, from_str, strlen(from_str), 0); - if (verbose) - printf("DUMMYCMD: %s\n%s\n",from_str,buffer); -#endif /* SMTP_USE_DUMMYCMD */ + /* allow for response to mail_command to reach us */ + recv(sd, buffer, MAX_INPUT_BUFFER-1, 0); + + if (verbose) + printf("DUMMYCMD: %s\n%s\n",from_str,buffer); + + } /* smtp_use_dummycmd */ /* tell the server we're done */ send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0); @@ -198,8 +226,11 @@ process_arguments (int argc, char **argv) {"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'}, {"help", no_argument, 0, 'h'}, @@ -219,8 +250,8 @@ process_arguments (int argc, char **argv) } while (1) { - c = getopt_long (argc, argv, "+hVvt:p:f:e:c:w:H:", long_options, - &option_index); + c = getopt_long (argc, argv, "+hVvt:p:f:e:c:w:H:C:", + long_options, &option_index); if (c == -1 || c == EOF) break; @@ -248,6 +279,13 @@ process_arguments (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); @@ -278,7 +316,7 @@ process_arguments (int argc, char **argv) } break; case 'V': /* version */ - print_revision (progname, "$Revision$"); + print_revision (progname, revision); exit (STATE_OK); case 'h': /* help */ print_help (); @@ -324,34 +362,13 @@ 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 (); } @@ -362,8 +379,8 @@ 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); } |