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#!/opt/bin/perl |
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|
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=head1 NAME |
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|
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aemp - AnyEvent:MP utility |
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|
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=head1 SYNOPSIS |
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|
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aemp command args... |
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|
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# protocol commands |
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aemp snd <port> <arg...> # send a message |
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aemp mon <port> # wait till port is killed |
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|
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# node configuration: secret |
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aemp gensecret # generate a random shared secret |
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aemp setsecret <secret> # set the shared secret |
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aemp clrsecret # remove the secret |
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|
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# node configuration: TLS |
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aemp setcert <file> # set a certificate (key.pem + certificate.pem) |
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aemp clrcert # remove certificate |
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aemp gencert # generate a random certificate |
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aemp forcetls <0|1> # enforce TLS connections? |
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|
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=head1 DESCRIPTION |
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|
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With aemp you can configure various aspects of AnyEvent::MP and it's protocol. |
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|
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=cut |
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|
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use common::sense; |
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|
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use Carp (); |
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|
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use AnyEvent; |
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use AnyEvent::MP::Config; |
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use AnyEvent::MP; |
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|
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sub run_cmd { |
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my $cmd = shift; |
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|
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require POSIX; |
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|
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local $^F = 1023; #d# |
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|
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my $cv = AE::cv; |
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|
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my %redir; |
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my @exe; |
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|
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while (@_) { |
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my $type = shift; |
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|
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my $fd = $type =~ s/^(\d+)// ? $1 : undef; |
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|
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# fd> |
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if ($type eq ">") { |
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my ($pr, $pw) = AnyEvent::Util::portable_pipe; |
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my $cb = shift; |
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|
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$cv->begin; |
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my $w; $w = AE::io $pr, 0, |
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"SCALAR" eq ref $cb |
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? sub { |
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sysread $pr, $$cb, 8192, length $$cb |
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and return; |
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undef $w; $cv->end; |
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} |
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: sub { |
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my $buf; |
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sysread $pr, $buf, 8192 |
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and return $cb->($buf); |
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undef $w; $cv->end; |
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} |
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; |
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$redir{defined $fd ? $fd : 1} = $pw; |
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|
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} elsif ($type =~ s/^>//) { |
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push @exe, sub { |
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open my $fh, ">", $type |
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or POSIX::_exit (125); |
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$redir{defined $fd ? $fd : 1} = $fh; |
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}; |
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|
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} elsif ($type =~ s/^<//) { |
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push @exe, sub { |
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open my $fh, "<", $type |
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or POSIX::_exit (125); |
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$redir{defined $fd ? $fd : 0} = $fh; |
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}; |
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} |
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} |
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|
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my $pid = fork; |
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|
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defined $pid |
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or Carp::croak "fork: $!"; |
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|
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unless ($pid) { |
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# step 1, execute |
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$_->() for @exe; |
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|
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# step 2, move any existing fd's out of the way |
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my @oldfh; |
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for my $fh (values %redir) { |
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push @oldfh, $fh; |
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$fh = fileno $fh; |
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|
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defined ($fh = POSIX::dup ($fh)) or POSIX::_exit (124) |
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while exists $redir{$fh}; |
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} |
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|
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# step 3, execute redirects |
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while (my ($k, $v) = each %redir) { |
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defined POSIX::dup2 ($v, $k) |
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or POSIX::_exit (123); |
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} |
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|
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# step 4, close everything else |
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for (3..1023) { #TODO |
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POSIX::close ($_) |
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unless exists $redir{$_}; |
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} |
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|
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exec @$cmd; |
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|
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POSIX::_exit (126); |
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} |
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|
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close $_ for values %redir; |
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|
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my $status; |
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$cv->begin (sub { shift->send ($status) }); |
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my $cw; $cw = AE::child $pid, sub { |
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$status = $_[1]; |
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undef $cw; $cv->end; |
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}; |
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|
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$cv |
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} |
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|
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sub my_run_cmd { |
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my ($cmd) = @_; |
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|
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my $cv = &run_cmd; |
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my $status = $cv->recv; |
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|
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$status |
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and die "@$cmd: command failed with exit status $status."; |
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} |
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|
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sub gen_cert { |
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my_run_cmd [qw(openssl req -new -nodes -x509 -days 3650 -batch -newkey rsa:2048 -keyout /dev/fd/3)], |
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"</dev/null", |
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">" , \my $cert, |
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"3>", \my $key, |
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"2>/dev/null"; |
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|
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"$cert$key" |
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} |
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|
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our $cfg = \%AnyEvent::MP::Config::CFG; |
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our $nodecfg = $cfg->{node}{"#default"} ||= {}; |
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|
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sub resolve_port { |
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my ($node, $port) = split /#/, $_[0], 2; |
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|
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$node = (resolve_node $node)->recv; |
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"$node#$port" |
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} |
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|
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our %CMD = ( |
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snd => sub { |
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my $port = resolve_port shift @ARGV; |
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initialise_node "slave/", node_of $port; |
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|
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snd $port, @ARGV; |
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|
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my $cv = AE::cv; |
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mon $port, $cv; |
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my $reply = port { &$cv }; |
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snd node_of $port, relay => $reply, "ok"; |
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|
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print join " ", $cv->recv, "\n"; |
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}, |
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|
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mon => sub { |
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my $port = resolve_port shift @ARGV; |
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initialise_node "slave/", node_of $port; |
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|
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mon $port, my $cv = AE::cv; |
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print join " ", $cv->recv, "\n"; |
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}, |
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|
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setsecret => sub { |
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@ARGV == 1 |
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or die "shared secret missing\n"; |
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|
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$nodecfg->{secret} = shift @ARGV; |
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++$cfg->{dirty}; |
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}, |
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gensecret => sub { |
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$nodecfg->{secret} = AnyEvent::MP::Base::asciibits AnyEvent::MP::Base::nonce 64; |
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++$cfg->{dirty}; |
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}, |
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clrsecret => sub { |
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delete $nodecfg->{secret}; |
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++$cfg->{dirty}; |
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}, |
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|
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setcert => sub { |
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@ARGV == 1 |
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or die "key+certificate pem filename missing\n"; |
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|
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open my $fh, "<", $ARGV[0] |
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or die "$ARGV[0]: $!"; |
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|
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local $/; |
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$nodecfg->{cert} = <$fh>; |
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++$cfg->{dirty}; |
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}, |
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gencert => sub { |
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$nodecfg->{cert} = gen_cert; |
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++$cfg->{dirty}; |
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}, |
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clrcert => sub { |
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delete $nodecfg->{cert}; |
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++$cfg->{dirty}; |
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}, |
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forcetls => sub { |
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@ARGV == 1 |
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or die "enable value missing\n"; |
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|
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$nodecfg->{forcetls} = !!shift @ARGV; |
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++$cfg->{dirty}; |
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}, |
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); |
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|
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sub docmd { |
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my $cmd = shift @ARGV; |
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|
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$CMD{$cmd} |
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or die "$cmd: no such aemp command (try man aemp)"; |
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|
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$CMD{$cmd}(); |
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} |
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|
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@ARGV |
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or die "Usage: aemp subcommand ... (try man aemp)\n"; |
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|
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docmd; |
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|
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|
