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|
#!/usr/bin/perl
#
# Use try to connect to a nntp server, and
# wait for the right output.
#
# For use with "mon".
#
# Arguments are "-p port -t timeout [-g group] [-f] host [host...]"
#
# This monitor connects to the NNTP server(s), checks for a greeting,
# then performs a "mode reader" and a "group (groupname)", and then disconnects.
# If the group is not specified by the -g option, then "control" is assumed.
#
# if "-f" is supplied, then it is assumed that a feeder is being tested,
# and the "mode reader" and "group (groupname)" commands are not executed.
#
# Adapted from "http.monitor" by
# Jim Trocki, trockij@transmeta.com
#
# http.monitor written by
#
# Jon Meek
# American Cyanamid Company
# Princeton, NJ
#
# $Id: nntp.monitor 1.3 Sat, 30 Jun 2001 14:44:29 -0400 trockij $
#
# Copyright (C) 1998, Jim Trocki
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
use Getopt::Std;
use English;
getopts ("fg:p:t:d");
$GROUP = $opt_g || 'control';
$PORT = $opt_p || 119;
$TIMEOUT = $opt_t || 30;
$FEEDER = $opt{"f"};
$DEBUG = $opt_d || "";
@failures = ();
foreach $host (@ARGV) {
if (! &nntpGET($host, $PORT)) {
push (@failures, $host);
}
}
if (@failures == 0) {
exit 0;
}
print join (" ", sort @failures), "\n";
exit 1;
sub nntpGET {
use Socket;
use Sys::Hostname;
my($Server, $Port) = @_;
my($ServerOK, $TheContent);
$ServerOK = 0;
$TheContent = '';
$Path = '/';
###############################################################
eval {
local $SIG{ALRM} = sub { die "Timeout Alarm" };
alarm $TIMEOUT;
$result = &OpenSocket($Server, $Port); # Open a connection to the server
if ($result == 0) { # Failure to open the socket
print "Unable to open socket\n" if $DEBUG;
return '';
}
#
# welcome message
#
$in = <S>;
if ($in !~ /^2\d\d/) {
alarm 0;
print "No welcome message\n" if $DEBUG;
return 0;
}
if (!$FEEDER) {
#
# mode reader, wait for OK response
#
print S "mode reader\r\n";
$in = <S>;
if ($in !~ /^2\d\d/) {
alarm 0;
print "Unable to perform 'mode reader'\n" if $DEBUG;
return 0;
}
#
# select $GROUP group, wait for OK response
#
print S "group $GROUP\r\n";
$in = <S>;
if ($in !~ /^2\d\d/) {
alarm 0;
print "Unable to select group '$GROUP'\n" if $DEBUG;
return 0;
}
}
#
# log out
#
print S "quit\r\n";
$in = <S>;
if ($in !~ /^2\d\d/) {
alarm 0;
print "No response on 'quit' command.\n" if $DEBUG;
return 0;
}
$ServerOK = 1;
close(S);
alarm 0; # Cancel the alarm
};
if ($EVAL_ERROR and ($EVAL_ERROR =~ /^Timeout Alarm/)) {
print "**** Time Out\n";
return 0;
}
return $ServerOK;
}
sub OpenSocket {
#
# Make a Berkeley socket connection between this program and a TCP port
# on another (or this) host. Port can be a number or a named service
#
local($OtherHostname, $Port) = @_;
local($OurHostname, $sockaddr, $name, $aliases, $proto, $type, $len,
$ThisAddr, $that);
$OurHostname = &hostname;
($name, $aliases, $proto) = getprotobyname('tcp');
($name, $aliases, $Port) = getservbyname($Port, 'tcp') unless $Port =~ /^\d+$/;
($name, $aliases, $type, $len, $ThisAddr) = gethostbyname($OurHostname);
($name, $aliases, $type, $len, $OtherHostAddr) = gethostbyname($OtherHostname);
my $that = sockaddr_in ($Port, $OtherHostAddr);
$result = socket(S, &PF_INET, &SOCK_STREAM, $proto) || return undef;
$result = connect(S, $that) || return undef;
select(S); $| = 1; select(STDOUT); # set S to be un-buffered
return 1; # success
}
|
