mirror of
https://github.com/fhem/fhem-mirror.git
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7650a76d71
git-svn-id: https://svn.fhem.de/fhem/trunk/fhem@12926 2b470e98-0d58-463d-a4d8-8e2adae1ed80
295 lines
7.4 KiB
Perl
295 lines
7.4 KiB
Perl
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# $Id$
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package main;
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use strict;
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use warnings;
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use IO::Socket::INET;
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sub
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dash_dhcp_Initialize($)
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{
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my ($hash) = @_;
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$hash->{ReadFn} = "dash_dhcp_Read";
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$hash->{DefFn} = "dash_dhcp_Define";
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$hash->{NOTIFYDEV} = "global";
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$hash->{NotifyFn} = "dash_dhcp_Notify";
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$hash->{UndefFn} = "dash_dhcp_Undefine";
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#$hash->{SetFn} = "dash_dhcp_Set";
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#$hash->{GetFn} = "dash_dhcp_Get";
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$hash->{AttrFn} = "dash_dhcp_Attr";
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$hash->{AttrList} = "devAlias disable:1,0 disabledForIntervals allowed port $readingFnAttributes";
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}
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#####################################
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sub
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dash_dhcp_Define($$)
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{
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my ($hash, $def) = @_;
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my @a = split("[ \t][ \t]*", $def);
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return "Usage: define <name> dash_dhcp" if(@a != 2);
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my $name = $a[0];
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$hash->{NAME} = $name;
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if( $init_done ) {
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dash_dhcp_startListener($hash);
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} else {
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readingsSingleUpdate($hash, 'state', 'initialized', 1 );
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}
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return undef;
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}
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sub
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dash_dhcp_Notify($$)
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{
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my ($hash,$dev) = @_;
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return if($dev->{NAME} ne "global");
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return if(!grep(m/^INITIALIZED|REREADCFG$/, @{$dev->{CHANGED}}));
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dash_dhcp_startListener($hash);
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return undef;
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}
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sub
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dash_dhcp_startListener($)
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{
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my ($hash) = @_;
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my $name = $hash->{NAME};
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dash_dhcp_stopListener($hash);
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return undef if( IsDisabled($name) > 0 );
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$hash->{PORT} = (!defined(getlogin) || getlogin eq 'root')?67:6767;
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$hash->{PORT} = AttrVal($name, 'port', $hash->{PORT});
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Log3 $name, 4, "$name: using port $hash->{PORT}";
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if( my $socket = IO::Socket::INET->new(LocalPort=>$hash->{PORT}, Proto=>'udp', Broadcast=>1, ReuseAddr=>1) ) {
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readingsSingleUpdate($hash, 'state', 'listening', 1 );
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Log3 $name, 3, "$name: listening";
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$hash->{LAST_CONNECT} = FmtDateTime( gettimeofday() );
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$hash->{FD} = $socket->fileno();
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$hash->{CD} = $socket; # sysread / close won't work on fileno
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$hash->{CONNECTS}++;
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$selectlist{$name} = $hash;
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} else {
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Log3 $name, 2, "$name: failed to open port $hash->{PORT} $@";
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dash_dhcp_stopListener($hash);
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InternalTimer(gettimeofday()+30, "dash_dhcp_startListener", $hash, 0);
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}
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}
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sub
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dash_dhcp_stopListener($)
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{
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my ($hash) = @_;
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my $name = $hash->{NAME};
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RemoveInternalTimer($hash);
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return if( !$hash->{CD} );
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close($hash->{CD}) if($hash->{CD});
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delete($hash->{FD});
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delete($hash->{CD});
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delete($selectlist{$name});
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readingsSingleUpdate($hash, 'state', 'stopped', 1 );
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Log3 $name, 3, "$name: stopped";
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$hash->{LAST_DISCONNECT} = FmtDateTime( gettimeofday() );
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}
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sub
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dash_dhcp_Undefine($$)
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{
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my ($hash, $arg) = @_;
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dash_dhcp_stopListener($hash);
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return undef;
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}
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sub
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dash_dhcp_Set($$@)
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{
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my ($hash, $name, $cmd, @args) = @_;
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my $list = "";
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return "Unknown argument $cmd, choose one of $list";
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}
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sub
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dash_dhcp_Get($$@)
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{
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my ($hash, $name, $cmd) = @_;
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my $list = "";
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return "Unknown argument $cmd, choose one of $list";
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}
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sub
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dash_dhcp_Parse($$;$)
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{
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my ($hash,$data,$peerhost) = @_;
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my $name = $hash->{NAME};
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my $chaddr;
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if (($data) =~ /^.*DHCPACK[^:]*([\da-z]{2}(:[\da-z]{2}){5}) .*/ ) {
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$chaddr=$1;
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} else {
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my ($op, $htype, $hlen, $hops, $xid, $secs, $flags ) = unpack( 'CCCCNnn', $data );
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#my $ciaddr = join '.', unpack('C4', substr($data, 12 ) );
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#my $yiaddr = join '.', unpack('C4', substr($data, 16 ) );
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#my $siaddr = join '.', unpack('C4', substr($data, 20 ) );
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#my $giaddr = join '.', unpack('C4', substr($data, 24 ) );
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$chaddr = join ':', unpack('(H2)*', substr($data, 28, $hlen ) );
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}
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my $allowed = AttrVal($name, "allowed", undef );
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if( !$chaddr || $chaddr !~ m/[\da-z]{2}(:[\da-z]{2}){5}/i ) {
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$chaddr = '<empty>' if( !$chaddr );
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Log3 $name, 2, "$name: invalid mac: $chaddr";
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} elsif( !$allowed || ",$allowed," =~/,$chaddr,/i ) {
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Log3 $name, 4, "$name: got $chaddr";
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$chaddr =~ s/:/-/g;
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$chaddr = $hash->{helper}{devAliases}{$chaddr} if( defined($hash->{helper}{devAliases}{$chaddr}) );
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readingsSingleUpdate( $hash, $chaddr, 'short', 1 );
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} else {
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Log3 $name, 4, "$name: ignoring $chaddr";
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}
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}
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sub
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dash_dhcp_Read($)
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{
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my ($hash) = @_;
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my $name = $hash->{NAME};
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my $len;
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my $buf;
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$len = $hash->{CD}->recv($buf, 1024);
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if( !defined($len) || !$len ) {
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Log 1, "!!!!!!!!!!";
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return;
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}
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#$buf = pack('H*', '010106000597ee0e05b90000c0a8a10d000000000000000000000000005056a3e69700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000638253633501030c0a646e732d7562756e7475370d011c02030f06770c2c2f1a792aff0000000000000000000000000000000000000000000000000000000000' );
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dash_dhcp_Parse($hash, $buf, $hash->{CD}->peerhost);
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}
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sub
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dash_dhcp_Attr($$$)
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{
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my ($cmd, $name, $attrName, $attrVal) = @_;
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my $orig = $attrVal;
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my $hash = $defs{$name};
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if( $attrName eq "devAlias" ) {
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delete $hash->{helper}{devAliases};
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if( $cmd eq 'set' && $attrVal ) {
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$hash->{helper}{devAliases} = {};
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foreach my $entry (split( ' ', $attrVal ) ) {
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my ($mac, $alias) = split( ':', $entry );
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$hash->{helper}{devAliases}{$mac} = $alias;
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}
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}
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} elsif( $attrName eq "disable" ) {
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if( $cmd eq 'set' && $attrVal ne "0" ) {
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dash_dhcp_stopListener($hash);
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} else {
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$attr{$name}{$attrName} = 0;
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dash_dhcp_startListener($hash);
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}
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} elsif( $attrName eq "disabledForIntervals" ) {
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delete $attr{$name}{$attrName};
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$attr{$name}{$attrName} = $attrVal if( $cmd eq 'set' );
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dash_dhcp_startListener($hash);
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} elsif( $attrName eq "port" ) {
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delete $attr{$name}{$attrName};
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$attr{$name}{$attrName} = $attrVal if( $cmd eq 'set' );
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dash_dhcp_startListener($hash);
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}
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if( $cmd eq 'set' ) {
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if( $orig ne $attrVal ) {
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$attr{$name}{$attrName} = $attrVal;
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return $attrName ." set to ". $attrVal;
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}
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}
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return;
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}
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1;
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=pod
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=item summary module for the amazon dash button
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=item summary_DE Modul für den amazon dash button
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=begin html
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<a name="dash_dhcp"></a>
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<h3>dash_dhcp</h3>
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<ul>
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Module to integrate amazon dash buttons into FHEM;.<br><br>
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The module can listen direclty to dhcp broadcast messages or listen to redirected openwrt dhcp log messages.
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Notes:
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<ul>
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<li>if listening for dhcp messages the module has to run as root or you have to redirect port 67 with
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<ul><code>iptables -A PREROUTING -t nat -i eth0 -p udp --dport 67 -j REDIRECT --to-port 6767</code></ul>
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or
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<ul><code>iptables -I PREROUTING -t nat -i eth0 -p udp --src 0.0.0.0 --dport 67 -j DNAT --to 0.0.0.0:6767</code></ul>
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and use the port attribute to configure the redirected port.</li>
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<li>to make iptables rules permanent see for example: https://www.thomas-krenn.com/de/wiki/Iptables_Firewall_Regeln_dauerhaft_speichern</li>
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</ul>
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<a name="dash_dhcp_Attr"></a>
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<b>Attr</b>
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<ul>
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<li>devAlias<br>
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space separated list of <mac>:<alias> pairs.</li>
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<li>allowed<br>
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comma separated list of allowed mac adresses</li>
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<li>port<br>
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the listen port. defaults to 67 for root and 6767 for other users.</li>
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<li><a href="#disable">disable</a></li>
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<li><a href="#disabledForIntervals">disabledForIntervals</a></li>
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</ul><br>
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</ul><br>
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=end html
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=cut
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