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Beck # All rights reserved. # # Copyright 2008 Sun Microsystems, Inc. All rights reserved. # Use is subject to license terms. # require 5.8.4; # minimal Perl version required use strict; use warnings; use English; use Socket; use Getopt::Std; our ($opt_v, $opt_b); # system requirements: # must have 'hostname' program. my $port = 'smtp'; select(STDERR); chop(my $name = `hostname || uname -n`); my ($hostname) = (gethostbyname($name))[0]; my $usage = "Usage: $PROGRAM_NAME [-bv] host [args]"; getopts('bv'); my $verbose = $opt_v; my $boot_check = $opt_b; my $server = shift(@ARGV); my @hosts = @ARGV; die $usage unless $server; my @cwfiles = (); my $alarm_action = ""; if (!@hosts) { push(@hosts, $hostname); open(CF, "){ # look for a line starting with "Fw" if (/^Fw.*$/) { my $cwfile = $ARG; chop($cwfile); my $optional = /^Fw-o/; # extract the file name $cwfile =~ s,^Fw[^/]*,,; # strip the options after the filename $cwfile =~ s/ [^ ]+$//; if (-r $cwfile) { push (@cwfiles, $cwfile); } else { die "$cwfile is not readable" unless $optional; } } # look for a line starting with "Cw" if (/^Cw(.*)$/) { my @cws = split (' ', $1); while (@cws) { my $thishost = shift(@cws); push(@hosts, $thishost) unless $thishost =~ "$hostname|localhost"; } } } close(CF); for my $cwfile (@cwfiles) { if (open(CW, "<$cwfile")) { while () { next if /^\#/; my $thishost = $ARG; chop($thishost); push(@hosts, $thishost) unless $thishost =~ $hostname; } close(CW); } else { die "open $cwfile: $ERRNO"; } } # Do this automatically if no client hosts are specified. $boot_check = "yes"; } my ($proto) = (getprotobyname('tcp'))[2]; ($port) = (getservbyname($port, 'tcp'))[2] unless $port =~ /^\d+/; if ($boot_check) { # first connect to localhost to verify that we can accept connections print "verifying that localhost is accepting SMTP connections\n" if ($verbose); my $localhost_ok = 0; ($name, my $laddr) = (gethostbyname('localhost'))[0, 4]; (!defined($name)) && die "gethostbyname failed, unknown host localhost"; # get a connection my $sinl = sockaddr_in($port, $laddr); my $save_errno = 0; for (my $num_tries = 1; $num_tries < 5; $num_tries++) { socket(S, &PF_INET, &SOCK_STREAM, $proto) || die "socket: $ERRNO"; if (connect(S, $sinl)) { &alarm("sending 'quit' to $server"); print S "quit\n"; alarm(0); $localhost_ok = 1; close(S); alarm(0); last; } print STDERR "localhost connect failed ($num_tries)\n"; $save_errno = $ERRNO; sleep(1 << $num_tries); close(S); alarm(0); } if (! $localhost_ok) { die "could not connect to localhost: $save_errno\n"; } } # look it up ($name, my $thataddr) = (gethostbyname($server))[0, 4]; (!defined($name)) && die "gethostbyname failed, unknown host $server"; # get a connection my $sinr = sockaddr_in($port, $thataddr); socket(S, &PF_INET, &SOCK_STREAM, $proto) || die "socket: $ERRNO"; print "server = $server\n" if (defined($verbose)); &alarm("connect to $server"); if (! connect(S, $sinr)) { die "cannot connect to $server: $ERRNO\n"; } alarm(0); select((select(S), $OUTPUT_AUTOFLUSH = 1)[0]); # don't buffer output to S # read the greeting &alarm("greeting with $server"); while () { alarm(0); print if $verbose; if (/^(\d+)([- ])/) { # SMTP's initial greeting response code is 220. if ($1 != 220) { &alarm("giving up after bad response from $server"); &read_response($2, $verbose); alarm(0); print STDERR "$server: NOT 220 greeting: $ARG" if ($verbose); } last if ($2 eq " "); } else { print STDERR "$server: NOT 220 greeting: $ARG" if ($verbose); close(S); } &alarm("greeting with $server"); } alarm(0); &alarm("sending ehlo to $server"); &ps("ehlo $hostname"); my $etrn_support = 0; while () { if (/^250([- ])ETRN(.+)$/) { $etrn_support = 1; } print if $verbose; last if /^\d+ /; } alarm(0); if ($etrn_support) { print "ETRN supported\n" if ($verbose); &alarm("sending etrn to $server"); while (@hosts) { $server = shift(@hosts); &ps("etrn $server"); while () { print if $verbose; last if /^\d+ /; } sleep(1); } } else { print "\nETRN not supported\n\n" } &alarm("sending 'quit' to $server"); &ps("quit"); while () { print if $verbose; last if /^\d+ /; } close(S); alarm(0); select(STDOUT); exit(0); # print to the server (also to stdout, if -v) sub ps { my ($p) = @_; print ">>> $p\n" if $verbose; print S "$p\n"; } sub alarm { ($alarm_action) = @_; alarm(10); $SIG{ALRM} = 'handle_alarm'; } sub handle_alarm { &giveup($alarm_action); } sub giveup { my $reason = @_; (my $pk, my $file, my $line); ($pk, $file, $line) = caller; print "Timed out during $reason\n" if $verbose; exit(1); } # read the rest of the current smtp daemon's response (and toss it away) sub read_response { (my $done, $verbose) = @_; (my @resp); print my $s if $verbose; while (($done eq "-") && ($s = ) && ($s =~ /^\d+([- ])/)) { print $s if $verbose; $done = $1; push(@resp, $s); } return @resp; }