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package RTSP::Proxy; |
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23789
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use Moose; |
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extends 'Net::Server::PreFork'; |
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use RTSP::Proxy::Session; |
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use Carp qw/croak/; |
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9
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our $VERSION = '0.07'; |
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=head1 NAME |
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RTSP::Proxy - Simple RTSP proxy server |
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=head1 SYNOPSIS |
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use RTSP::Proxy; |
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my $proxy = RTSP::Proxy->new({ |
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rtsp_client => { |
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address => '10.0.1.105', |
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media_path => '/mpeg4/media.amp', |
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client_port_range => '6970-6971', |
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transport_protocol => 'RTP/AVP;unicast', |
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}, |
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port => 554, |
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listen => 5, |
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}); |
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$proxy->run; |
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=head1 DESCRIPTION |
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This module is a simple RTSP proxy based on L<Net::Server> and L<RTSP::Client>. |
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35
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When a client connects and sends commands to the server, it will pass them through the RTSP client and return the results back. |
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37
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This module will also automatically proxy the media transport protocol as well. Currently it only proxies RTP over UDP, but support for other transports may be added if requested. |
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39
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This has only been tested with VLC and Axis IP cameras, it may not work with your setup. Patches and feedback welcome. |
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Note: you will need to be root to bind to port 554, you may drop privs if you wish. See the configuration options in L<Net::Server> for more details. |
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=head2 EXPORT |
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45
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None by default. |
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47
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=head2 METHODS |
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49
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=over 4 |
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51
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=cut |
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53
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has session => ( |
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is => 'rw', |
55
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isa => 'RTSP::Proxy::Session', |
56
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); |
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58
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sub transport_listen_port_start { 6970 } |
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sub transport_listen_port_end { 6971 } |
60
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61
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sub process_request { |
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my $self = shift; |
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64
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my $method; |
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my $uri; |
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my $proto; |
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my $headers = {}; |
68
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my $sock = $self->{server}->{client} or die "Could not find client socket"; |
69
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70
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READ: while (my $line = <$sock>) { |
71
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$self->log(5, "got line: $line"); |
72
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73
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unless ($method) { |
74
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# first line should be method |
75
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($method, $uri, $proto) = $line =~ m!(\w+)\s+(\S+)(?:\s+(\S+))?\r\n!ism; |
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77
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$self->log(4, "received: method: $method, uri: $uri, protocol: $proto"); |
78
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79
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unless ($method && $uri && $proto =~ m!RTSP/1.\d!i) { |
80
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$self->log(1, "Invalid request: $line"); |
81
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return $self->return_status(403, 'Bad request'); |
82
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} |
83
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next READ; |
84
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} else { |
85
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goto DONE if $line eq "\r\n"; |
86
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87
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# header |
88
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my ($header_name, $header_value) = $line =~ /^([-A-Za-z0-9]+)\s*:\s*(.*)$/; |
89
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unless ($header_name) { |
90
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$self->log(1, "Invalid header: $line"); |
91
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next; |
92
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} |
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94
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$headers->{$header_name} ||= []; |
95
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push @{$headers->{$header_name}}, $header_value; |
96
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next READ; |
97
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} |
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99
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DONE: |
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last unless $method && $proto; |
101
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102
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$method = uc $method; |
103
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104
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105
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# get/create session |
106
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my $session; |
107
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if ($self->{server}{session}) { |
108
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$session = $self->{server}{session}; |
109
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} else { |
110
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my $client_settings = $self->{server}{rtsp_client} or die "Could not find client configuration"; |
111
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my $transport_handler_settings = $self->{server}{transport_handler}; |
112
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113
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my $transport_handler_class = $self->{server}{transport_handler_class}; |
114
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croak "build_transport_handler() called without transport_handler_class being defined" |
115
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unless $transport_handler_class; |
116
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117
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# get client address |
118
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my $sock = $self->{server}{client}; |
119
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my $client_address = $sock->peerhost; |
120
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121
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# create RTSP session object |
122
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$self->log(3, "creating session"); |
123
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$session = RTSP::Proxy::Session->new( |
124
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client_address => $client_address, |
125
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media_uri => $uri, |
126
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rtsp_client_opts => $client_settings, |
127
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transport_handler_opts => $transport_handler_settings, |
128
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transport_handler_class => $transport_handler_class, |
129
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); |
130
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131
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# save session |
132
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$self->{server}{session} = $session; |
133
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} |
134
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135
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if ($method eq 'PLAY') { |
136
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$session->rtsp_client->reset; |
137
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} |
138
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139
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# parse out setup info |
140
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my ($client_port_start, $client_port_end); |
141
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if ($method eq 'SETUP') { |
142
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# parse out the client requested ports |
143
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my $transport; |
144
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$transport = @{$headers->{Transport}}[0] if $headers->{Transport}; |
145
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$transport = @{$headers->{transport}}[0] if $headers->{transport}; |
146
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$self->log(3, "transport: '$transport'") if $transport; |
147
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148
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# rewrite the client port range |
149
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my ($client_port_start, $client_port_end); # FIX THIS |
150
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($client_port_start, $client_port_end) = |
151
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$self->rewrite_transport( |
152
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\$transport, |
153
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$self->transport_listen_port_start, |
154
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$self->transport_listen_port_end) if $transport; |
155
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156
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if ($client_port_start) { |
157
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# replace transport header with our transport specification |
158
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delete $headers->{Transport}; |
159
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delete $headers->{transport}; |
160
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$headers->{Transport} = [$transport]; |
161
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162
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$self->set_client_port_range($client_port_start, $client_port_end); |
163
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} |
164
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} |
165
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166
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$self->proxy_request($method, $uri, $session, $headers); |
167
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168
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# so we can reuse the client for more requests |
169
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if ($method eq 'SETUP' || $method eq 'DESCRIBE' || $method eq 'TEARDOWN') { |
170
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$self->log(4, "resetting rtsp client"); |
171
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$session->rtsp_client->reset; |
172
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} |
173
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174
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if ($method eq 'TEARDOWN') { |
175
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delete $self->{server}{session}; |
176
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} |
177
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178
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$method = ''; |
179
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$uri = ''; |
180
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$proto = ''; |
181
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$headers = {}; |
182
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} |
183
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} |
184
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185
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sub set_client_port_range { |
186
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my ($self, $client_port_start, $client_port_end) = @_; |
187
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188
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my $session = $self->{server}{session}; |
189
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unless ($session) { |
190
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$self->log(1, "error: didn't find session in set_client_port_range"); |
191
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return; |
192
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} |
193
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194
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return if $session->client_port_start && $session->client_port_start == $client_port_start; |
195
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196
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$client_port_end ||= $client_port_start; |
197
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198
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$self->log(3, "setting session client port $client_port_start"); |
199
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$session->client_port_start($client_port_start); |
200
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$session->client_port_end($client_port_end); |
201
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202
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# now ready to run server to proxy media transport |
203
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$self->log(1, "starting transport handler server"); |
204
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$session->run_transport_handler_server; |
205
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} |
206
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207
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sub rewrite_transport { |
208
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my ($self, $transportref, $client_port_start, $client_port_end) = @_; |
209
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return "" unless $transportref && $$transportref; |
210
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211
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my $old_transport = $$transportref; |
212
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213
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my ($orig_port_start, $orig_port_end) = $$transportref =~ /client_port=(\d+)(?:-(\d+))?/i; |
214
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if ($orig_port_start) { |
215
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$orig_port_end ||= $orig_port_start; |
216
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217
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# kinda sketchy |
218
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my $port_range = "${client_port_start}-$client_port_end"; |
219
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$$transportref =~ s/client_port=((?:\d+)(?:-(?:\d+)))?/client_port=$port_range/ims; |
220
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$self->log(3, "rewriting transport request:\n old: $old_transport\n new: $$transportref"); |
221
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222
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return ($orig_port_start, $orig_port_end); |
223
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} |
224
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225
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return; |
226
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} |
227
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228
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|
sub proxy_request { |
229
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|
my ($self, $method, $uri, $session, $headers) = @_; |
230
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231
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$self->log(2, "\n-------------------------\nproxying $method / $uri to " . $session->rtsp_client->address); |
232
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233
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my $client = $session->rtsp_client; |
234
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235
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unless ($client->connected) { |
236
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# open a connection |
237
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unless ($client->open) { |
238
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$self->log(0, "Failed to connect to camera: $!"); |
239
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return $self->return_status(404, "Resource not found"); |
240
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} |
241
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} |
242
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243
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# pass through some headers |
244
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foreach my $header_name (qw/ |
245
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Accept Bandwidth Accept-Language ClientChallenge PlayerStarttime RegionData |
246
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GUID ClientID Transport x-retransmit x-dynamic-rate x-transport-options Session |
247
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Range/) { |
248
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249
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my $header_value = $headers->{$header_name}; |
250
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next unless defined $header_value && @$header_value; |
251
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252
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# can be multiple versions of a header |
253
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foreach my $h (@$header_value) { |
254
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$self->chomp_line(\$h); |
255
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256
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|
# if (lc $header_name eq 'transport' && $h) { |
257
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# my ($client_port_start, $client_port_end) = $self->rewrite_transport( |
258
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# \$h, |
259
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# $self->transport_listen_port_start, |
260
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# $self->transport_listen_port_end |
261
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# ); |
262
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|
# $self->set_client_port_range($client_port_start, $client_port_end); |
263
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|
# } |
264
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|
# |
265
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|
$client->add_req_header($header_name, $h); |
266
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|
$self->log(3, "passing through header $header_name\t=$h"); |
267
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} |
268
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|
} |
269
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270
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|
# do request |
271
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|
my $ok; |
272
|
|
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|
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|
|
my $body; |
273
|
|
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|
|
|
|
if ($method eq 'SETUP') { |
274
|
|
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|
|
$ok = $client->setup; |
275
|
|
|
|
|
|
|
} elsif ($method eq 'DESCRIBE') { |
276
|
|
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|
|
|
|
# proxy body response |
277
|
|
|
|
|
|
|
$body = $client->describe; |
278
|
|
|
|
|
|
|
} elsif ($method eq 'OPTIONS') { |
279
|
|
|
|
|
|
|
$ok = $client->options; |
280
|
|
|
|
|
|
|
} elsif ($method eq 'TEARDOWN') { |
281
|
|
|
|
|
|
|
$ok = $client->teardown; |
282
|
|
|
|
|
|
|
} else { |
283
|
|
|
|
|
|
|
$ok = $client->request($method); |
284
|
|
|
|
|
|
|
} |
285
|
|
|
|
|
|
|
|
286
|
|
|
|
|
|
|
my $status_message = $client->status_message; |
287
|
|
|
|
|
|
|
my $status_code = $client->status; |
288
|
|
|
|
|
|
|
|
289
|
|
|
|
|
|
|
$self->log(4, "$status_code $status_message - got headers: " . $client->_rtsp->headers_string . "\n"); |
290
|
|
|
|
|
|
|
|
291
|
|
|
|
|
|
|
unless ($status_code) { |
292
|
|
|
|
|
|
|
$status_code = 405; |
293
|
|
|
|
|
|
|
$status_message = "Bad request"; |
294
|
|
|
|
|
|
|
} |
295
|
|
|
|
|
|
|
|
296
|
|
|
|
|
|
|
my $res = ''; |
297
|
|
|
|
|
|
|
|
298
|
|
|
|
|
|
|
# return status |
299
|
|
|
|
|
|
|
$res .= "RTSP/1.0 $status_code $status_message\r\n"; |
300
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
# pass some headers back |
302
|
|
|
|
|
|
|
foreach my $header_name (qw/ |
303
|
|
|
|
|
|
|
Content-Type Content-Base Public Allow Transport Session |
304
|
|
|
|
|
|
|
Rtp-Info Range transport Date Www-Authenticate/) { |
305
|
|
|
|
|
|
|
my $header_values = $client->get_header($header_name); |
306
|
|
|
|
|
|
|
next unless defined $header_values; |
307
|
|
|
|
|
|
|
foreach my $val (@$header_values) { |
308
|
|
|
|
|
|
|
$self->log(4, "header: $header_name, value: '$val'"); |
309
|
|
|
|
|
|
|
$self->chomp_line(\$val); |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
$self->rewrite_transport_response($session, \$val) |
312
|
|
|
|
|
|
|
if lc $header_name eq 'transport'; |
313
|
|
|
|
|
|
|
|
314
|
|
|
|
|
|
|
$res .= "$header_name: $val\r\n"; |
315
|
|
|
|
|
|
|
} |
316
|
|
|
|
|
|
|
} |
317
|
|
|
|
|
|
|
|
318
|
|
|
|
|
|
|
# respond with correct CSeq |
319
|
|
|
|
|
|
|
my $cseq; |
320
|
|
|
|
|
|
|
$cseq = @{$headers->{CSeq}} if $headers->{CSeq}; |
321
|
|
|
|
|
|
|
$cseq = @{$headers->{Cseq}} if $headers->{Cseq}; |
322
|
|
|
|
|
|
|
$cseq = @{$headers->{cseq}} if $headers->{cseq}; |
323
|
|
|
|
|
|
|
if ($cseq) { |
324
|
|
|
|
|
|
|
$self->chomp_line(\$cseq); |
325
|
|
|
|
|
|
|
$res .= "cseq: $cseq\r\n"; |
326
|
|
|
|
|
|
|
} |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
$self->write($res, $body); |
329
|
|
|
|
|
|
|
} |
330
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
sub write { |
332
|
|
|
|
|
|
|
my ($self, $headers_string, $body) = @_; |
333
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
my $res = $headers_string; |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
if ($body) { |
337
|
|
|
|
|
|
|
$self->chomp_line(\$body); |
338
|
|
|
|
|
|
|
$res .= "Content-Length: " . length($body) . "\r\n\r\n$body"; |
339
|
|
|
|
|
|
|
} else { |
340
|
|
|
|
|
|
|
$res .= "\r\n"; |
341
|
|
|
|
|
|
|
} |
342
|
|
|
|
|
|
|
|
343
|
|
|
|
|
|
|
my $sock = $self->{server}->{client} or die "Could not find client socket"; |
344
|
|
|
|
|
|
|
$sock->write("$res"); |
345
|
|
|
|
|
|
|
|
346
|
|
|
|
|
|
|
$self->log(4, ">>$res\n"); |
347
|
|
|
|
|
|
|
} |
348
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
sub rewrite_transport_response { |
350
|
|
|
|
|
|
|
my ($self, $session, $respref) = @_; |
351
|
|
|
|
|
|
|
return unless $respref && $$respref; |
352
|
|
|
|
|
|
|
|
353
|
|
|
|
|
|
|
my $old_resp = $$respref; |
354
|
|
|
|
|
|
|
$self->log(3, "transport response: $old_resp"); |
355
|
|
|
|
|
|
|
|
356
|
|
|
|
|
|
|
my $client_port_start = $session->client_port_start; |
357
|
|
|
|
|
|
|
my $client_port_end = $session->client_port_end; |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
return unless $client_port_start && $client_port_end; |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
my $port_range = "${client_port_start}-$client_port_end"; |
362
|
|
|
|
|
|
|
$$respref =~ s/client_port=((?:\d+)(?:-(?:\d+)))?/client_port=$port_range/ims; |
363
|
|
|
|
|
|
|
$self->log(3, "rewriting transport response:\n old: $old_resp\n new: $$respref"); |
364
|
|
|
|
|
|
|
} |
365
|
|
|
|
|
|
|
|
366
|
|
|
|
|
|
|
# clean up stuff! |
367
|
|
|
|
|
|
|
sub post_client_connection_hook { |
368
|
|
|
|
|
|
|
my $self = shift; |
369
|
|
|
|
|
|
|
|
370
|
|
|
|
|
|
|
$self->log(3, "client connection closed"); |
371
|
|
|
|
|
|
|
|
372
|
|
|
|
|
|
|
my $session = $self->{server}{session}; |
373
|
|
|
|
|
|
|
if ($session) { |
374
|
|
|
|
|
|
|
delete $self->{server}{session}; |
375
|
|
|
|
|
|
|
} |
376
|
|
|
|
|
|
|
} |
377
|
|
|
|
|
|
|
|
378
|
|
|
|
|
|
|
##### |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
sub return_status { |
381
|
|
|
|
|
|
|
my ($self, $code, $msg) = @_; |
382
|
|
|
|
|
|
|
print STDOUT "$code $msg\r\n"; |
383
|
|
|
|
|
|
|
$self->log(3, "Returning status $code $msg"); |
384
|
|
|
|
|
|
|
} |
385
|
|
|
|
|
|
|
|
386
|
|
|
|
|
|
|
sub chomp_line { |
387
|
|
|
|
|
|
|
my ($self, $lineref) = @_; |
388
|
|
|
|
|
|
|
$$lineref =~ s/([\r\n]+)$//sm; |
389
|
|
|
|
|
|
|
} |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
sub default_values { |
392
|
|
|
|
|
|
|
return { |
393
|
|
|
|
|
|
|
proto => 'tcp', |
394
|
|
|
|
|
|
|
listen => 3, |
395
|
|
|
|
|
|
|
port => 554, |
396
|
|
|
|
|
|
|
no_client_stdout => 1, |
397
|
|
|
|
|
|
|
} |
398
|
|
|
|
|
|
|
} |
399
|
|
|
|
|
|
|
|
400
|
|
|
|
|
|
|
sub options { |
401
|
|
|
|
|
|
|
my $self = shift; |
402
|
|
|
|
|
|
|
my $prop = $self->{'server'}; |
403
|
|
|
|
|
|
|
my $template = shift; |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
### setup options in the parent classes |
406
|
|
|
|
|
|
|
$self->SUPER::options($template); |
407
|
|
|
|
|
|
|
|
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
### rtsp client args |
410
|
|
|
|
|
|
|
my $client = $prop->{rtsp_client} |
411
|
|
|
|
|
|
|
or croak "No rtsp_client definition specified"; |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
$template->{rtsp_client} = \ $prop->{rtsp_client}; |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
|
416
|
|
|
|
|
|
|
### transport class |
417
|
|
|
|
|
|
|
my $tc = $prop->{'transport_handler_class'} || 'RTP'; |
418
|
|
|
|
|
|
|
$tc = "RTSP::Proxy::Transport::$tc"; |
419
|
|
|
|
|
|
|
eval "use $tc; 1;" or die $@; |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
$prop->{'transport_handler_class'} = $tc; |
422
|
|
|
|
|
|
|
$template->{'transport_handler_class'} = \ $prop->{'transport_handler_class'}; |
423
|
|
|
|
|
|
|
|
424
|
|
|
|
|
|
|
my $transport_handler = $prop->{transport_handler} || {}; |
425
|
|
|
|
|
|
|
$prop->{transport_handler} = $transport_handler; |
426
|
|
|
|
|
|
|
$template->{transport_handler} = \ $prop->{transport_handler}; |
427
|
|
|
|
|
|
|
} |
428
|
|
|
|
|
|
|
|
429
|
|
|
|
|
|
|
__PACKAGE__->meta->make_immutable(inline_constructor => 0); |
430
|
|
|
|
|
|
|
|
431
|
|
|
|
|
|
|
__END__ |
432
|
|
|
|
|
|
|
|
433
|
|
|
|
|
|
|
|
434
|
|
|
|
|
|
|
|
435
|
|
|
|
|
|
|
|
436
|
|
|
|
|
|
|
=head1 SEE ALSO |
437
|
|
|
|
|
|
|
|
438
|
|
|
|
|
|
|
L<RTSP::Client> |
439
|
|
|
|
|
|
|
|
440
|
|
|
|
|
|
|
=head1 AUTHOR |
441
|
|
|
|
|
|
|
|
442
|
|
|
|
|
|
|
Mischa Spiegelmock, E<lt>revmischa@cpan.orgE<gt> |
443
|
|
|
|
|
|
|
|
444
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
445
|
|
|
|
|
|
|
|
446
|
|
|
|
|
|
|
Copyright (C) 2010 by Mischa Spiegelmock |
447
|
|
|
|
|
|
|
|
448
|
|
|
|
|
|
|
This library is free software; you can redistribute it and/or modify |
449
|
|
|
|
|
|
|
it under the same terms as Perl itself, either Perl version 5.10.0 or, |
450
|
|
|
|
|
|
|
at your option, any later version of Perl 5 you may have available. |
451
|
|
|
|
|
|
|
|
452
|
|
|
|
|
|
|
=head1 GUINEAS |
453
|
|
|
|
|
|
|
|
454
|
|
|
|
|
|
|
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS 8DDDDDDDDDDDDDDDDDDDDDDDD horseBERD |
455
|
|
|
|
|
|
|
|
456
|
|
|
|
|
|
|
=cut |