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+package Echolot::Pinger::Mix;
+
+#
+# $Id$
+#
+# This file is part of Echolot - a Pinger for anonymous remailers.
+#
+# Copyright (c) 2002, 2003, 2004 Peter Palfrader <peter@palfrader.org>
+#
+# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+
+=pod
+
+=head1 Name
+
+Echolot::Pinger::Mix - send mix pings
+
+=head1 DESCRIPTION
+
+This package provides functions for sending mixmaster (type II) pings.
+
+=cut
+
+use strict;
+use English;
+use IO::Handle;
+use Echolot::Log;
+
+sub ping($$$$$) {
+ my ($body, $to, $with_from, $chain, $keys) = @_;
+
+ my $chaincomma = join (',', @$chain);
+
+ my $keyring = Echolot::Config::get()->{'mixhome'}.'/pubring.mix';
+ open (F, '>'.$keyring) or
+ Echolot::Log::warn("Cannot open $keyring for writing: $!."),
+ return 0;
+ for my $keyid (keys %$keys) {
+ print (F $keys->{$keyid}->{'summary'}, "\n\n");
+ print (F $keys->{$keyid}->{'key'},"\n\n");
+ };
+ close (F) or
+ Echolot::Log::warn("Cannot close $keyring: $!."),
+ return 0;
+
+ my $type2list = Echolot::Config::get()->{'mixhome'}.'/type2.list';
+ open (F, '>'.$type2list) or
+ Echolot::Log::warn("Cannot open $type2list for writing: $!."),
+ return 0;
+ for my $keyid (keys %$keys) {
+ print (F $keys->{$keyid}->{'summary'}, "\n");
+ };
+ close (F) or
+ Echolot::Log::warn("Cannot close $type2list: $!."),
+ return 0;
+
+ my $mixcfg = Echolot::Config::get()->{'mixhome'}.'/mix.cfg';
+ my $address = Echolot::Config::get()->{'my_localpart'} . '@' .
+ Echolot::Config::get()->{'my_domain'};
+ my $sendmail = Echolot::Config::get()->{'sendmail'};
+ open (F, ">$mixcfg") or
+ Echolot::Log::warn("Cannot open $mixcfg for writing: $!."),
+ return 0;
+ print (F "REMAIL n\n");
+ print (F "NAME Echolot Pinger\n");
+ print (F "ADDRESS $address\n");
+ print (F "PUBRING pubring.mix\n");
+ print (F "TYPE2LIST type2.list\n");
+ print (F "SENDMAIL $sendmail -f $address -t\n");
+ print (F "VERBOSE 0\n");
+ print (F "INDUMMYP 0\n");
+ print (F "OUTDUMMYP 0\n");
+ close (F) or
+ Echolot::Log::warn("Cannot close $mixcfg: $!."),
+ return 0;
+
+ my ($stdinR, $stdinW) = (IO::Handle->new(), IO::Handle->new());
+ my ($stdoutR, $stdoutW) = (IO::Handle->new(), IO::Handle->new());
+ my ($stderrR, $stderrW) = (IO::Handle->new(), IO::Handle->new());
+ pipe $stdinR, $stdinW;
+ pipe $stdoutR, $stdoutW;
+ pipe $stderrR, $stderrW;
+ my $pid = fork();
+ defined $pid or
+ Echolot::Log::warn("Cannot fork for calling mixmaster: $!."),
+ return 0;
+ unless ($pid) { # child
+ $stdinW->close;
+ $stdoutR->close;
+ $stderrR->close;
+ close STDIN;
+ close STDOUT;
+ close STDERR;
+ open (STDIN, "<&".$stdinR->fileno) or Echolot::Log::warn ("Cannot dup stdinR (fd ".$stdinR->fileno.") as STDIN: $!");
+ open (STDOUT, ">&".$stdoutW->fileno) or Echolot::Log::warn ("Cannot dup stdoutW (fd ".$stdoutW->fileno.") as STDOUT: $!");
+ open (STDERR, ">&".$stderrW->fileno) or Echolot::Log::warn ("Cannot dup stderrW (fd ".$stderrW->fileno.") as STDERE: $!");
+ $ENV{'MIXPATH'} = Echolot::Config::get()->{'mixhome'};
+ { exec(Echolot::Config::get()->{'mixmaster'}, qw{-m -S -l}, $chaincomma); };
+ Echolot::Log::warn("Cannot exec mixpinger: $!.");
+ exit(1);
+ };
+ $stdinR->close;
+ $stdoutW->close;
+ $stderrW->close;
+
+ my $msg;
+ $msg .= "From: Echolot Pinger <$address>\n" if $with_from;
+ $msg .= "To: $to\n\n$body\n";
+
+ Echolot::Log::debug("mixping: fds: stdinW $stdinW; stdoutR $stdoutR; stderrR $stderrR."),
+ my ($stdout, $stderr, undef) = Echolot::Tools::readwrite_gpg($msg, $stdinW, $stdoutR, $stderrR, undef);
+ waitpid $pid, 0;
+
+ $stderr =~ s/\n+$//;
+ Echolot::Log::debug("Mixmaster said on unfiltered stderr: $stderr") if ($stderr ne '');
+ $stderr =~ s/^Chain: .*//mg;
+ $stderr =~ s/^Warning: The message has a From: line.*//mg;
+ $stderr =~ s/\n+$//;
+ Echolot::Log::info("Mixmaster said on stdout: $stdout") if ($stdout ne '');
+ Echolot::Log::warn("Mixmaster said on stderr: $stderr") if ($stderr ne '');
+
+ return 1;
+};
+
+1;
+# vim: set ts=4 shiftwidth=4: