1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
#!/usr/bin/perl
# VDR SVDRP Peer Demo
#
# This script broadcasts an SVDRP discover datagram on the SVDRP UDP port and
# then listens for replies from peer VDRs on both the UDP and TCP port.
# It reacts properly to the SVDRP commands CONN, LSTT, POLL, PING and QUIT,
# and thus seems like a regular VDR to other VDRs.
#
# See the main source file 'vdr.c' for copyright information and
# how to reach the author.
use Getopt::Std;
use IO::Socket;
use IO::Select;
$DefaultSvdrpPort = 6419;
$DefaultSvdrpName = "peerdemo";
$Usage = qq{
Usage: $0 options
Options: -n name use the given VDR name (default: $DefaultSvdrpName)
-p port use the given TCP port (default: $DefaultSvdrpPort)
-v be verbose
};
die $Usage if (!getopts("n:p:v"));
$Name = $opt_n || $DefaultSvdrpName;
$Port = $opt_p || $DefaultSvdrpPort;
$Verbose = $opt_v || 0;
# Open TCP and UDP sockets:
$TcpPort = $Port;
$UdpPort = $DefaultSvdrpPort;
$TcpSocket = new IO::Socket::INET(Listen => 5, LocalPort => $TcpPort, Proto => "tcp", ReusePort => 1) || die "$!";
$UdpSocket = new IO::Socket::INET( LocalPort => $UdpPort, Proto => "udp", ReuseAddr => 1) || die "$!";
$SvdrpSelect = new IO::Select($TcpSocket);
setsockopt($UdpSocket, SOL_SOCKET, SO_RCVTIMEO, pack('L!L!', 0, 1000)); # 1ms timeout on UDP socket
# Send UDP broadcast:
$BcastSocket = new IO::Socket::INET(PeerAddr => '255.255.255.255', PeerPort => $UdpPort, Proto => "udp", Broadcast => 1) || die "$!";
$BcastMsg = "SVDRP:discover name:$Name port:$TcpPort vdrversion:20309 apiversion:20309 timeout:300";
Log('>', $BcastSocket, $BcastMsg);
print($BcastSocket $BcastMsg);
$BcastSocket->close();
# Listen on UDP and TCP socket:
while (1) {
if ($UdpSocket->recv($Request, 1024)) {
if (Extract($Request, "name") ne $Name) {
Log('<', $UdpSocket, $Request);
ReportVDR($Request, $UdpSocket->peerhost());
}
}
if (my @Ready = $SvdrpSelect->can_read(0.01)) {
for my $fh (@Ready) {
if ($fh == $TcpSocket) {
# accept connection:
my $new = $TcpSocket->accept();
Log('<', $new, "incoming TCP connection");
# send mandatory response to simulate an SVDRP host:
my $Prompt = "220 $Name SVDRP VideoDiskRecorder 2.3.9; Wed Nov 29 17:00:29 2017; ISO-8859-1";
Log('>', $new, $Prompt);
print($new "$Prompt\n");
# add incoming connection to select:
$SvdrpSelect->add($new);
}
else {
# process connection:
my $Request = "";
$fh->recv($Request, 1024);
chomp($Request);
Log('<', $fh, $Request) if ($Request);
if ($Request =~ /^CONN/i) {
Reply($fh, "250 OK");
ReportVDR($Request, $fh->peerhost());
}
elsif ($Request =~ /^LSTT/i) {
Reply($fh, "550 No timers defined");
}
elsif ($Request =~ /^POLL/i) {
Reply($fh, "250 OK");
}
elsif ($Request =~ /^PING/i) {
Reply($fh, "250 $Name is alive");
}
elsif ($Request =~ /^QUIT/i || !$Request) {
# close connection:
Log('<', $fh, "connection closed");
$SvdrpSelect->remove($fh);
$fh->close;
}
}
}
}
}
# Tools:
sub Reply
{
my ($fh, $s) = @_;
Log('>', $fh, $s);
print($fh "$s\n");
}
sub ReportVDR
{
my $s = shift;
my $PeerHost = shift;
$s .= " "; # for easier parsing
my $Name = Extract($s, "name");
my $Port = Extract($s, "port");
my $VdrVersion = Extract($s, "vdrversion");
my $ApiVersion = Extract($s, "apiversion");
my $Timeout = Extract($s, "timeout");
print("found VDR '$Name' at $PeerHost with SVDRP port '$Port'\n");
}
sub Extract
{
my ($s, $n) = @_;
return ($s =~ / $n:([^ ]*) /)[0];
}
sub Log
{
return unless ($Verbose);
my ($Dir, $Socket, $Msg) = @_;
printf("SVDRP %s [%s:%s] %s\n", $Dir, $Socket->peerhost(), $Socket->peerport(), $Msg);
}
|
