dekker.one
An Uppaal analysis of the connection setup of the TCP protocol.
Stylistic changes
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Model/model.xml
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Model/model.xml
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TCP_packet transfer;
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void set_target() {
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target = target_address;
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target = target_address;
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}
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void receive_packet(){
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from_network := transfer;
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}
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</declaration><location id="id0" x="-5312" y="-1536"><committed/></location><location id="id1" x="-5152" y="-1664"><name x="-5160" y="-1696">PacketLost</name><committed/></location><location id="id2" x="-5312" y="-1664"><name x="-5360" y="-1696">PacketInTransit</name></location><location id="id3" x="-5312" y="-1408"><name x="-5360" y="-1384">ReadyToReceive</name></location><init ref="id3"/><transition><source ref="id0"/><target ref="id2"/><label kind="assignment" x="-5296" y="-1560">initialize(from_network)</label><nail x="-5280" y="-1592"/></transition><transition><source ref="id0"/><target ref="id3"/><label kind="synchronisation" x="-5400" y="-1480">Packet[target]!</label></transition><transition><source ref="id2"/><target ref="id0"/><label kind="assignment" x="-5400" y="-1608">send_packet()</label></transition><transition><source ref="id2"/><target ref="id1"/></transition><transition><source ref="id1"/><target ref="id3"/><nail x="-5152" y="-1408"/></transition><transition><source ref="id3"/><target ref="id2"/><label kind="synchronisation" x="-5432" y="-1560">Packet[network]?</label><label kind="assignment" x="-5432" y="-1544">set_target(),
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receive_packet()</label><nail x="-5440" y="-1408"/><nail x="-5440" y="-1664"/><nail x="-5440" y="-1664"/></transition></template><template><name>Host_Handshake</name><parameter>const int local, const int remote, const int network</parameter><declaration>clock c;
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receive_packet()</label><nail x="-5440" y="-1408"/><nail x="-5440" y="-1664"/></transition></template><template><name>Host_Handshake</name><parameter>const int local, const int remote, const int network</parameter><declaration>clock c;
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int last_syn = 0;
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int last_ack = 0;
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int retrans_syn;