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verifyTcpCloseCapture() — netty Function Reference

Architecture documentation for the verifyTcpCloseCapture() function in PcapWriteHandlerTest.java from the netty codebase.

Function java Buffer Allocators called by 6

Entity Profile

Dependency Diagram

graph TD
  48f0964c_1c25_e316_603f_d8c514e3fbc2["verifyTcpCloseCapture()"]
  e9f4993c_4935_9405_4fab_0bbc9030a673["PcapWriteHandlerTest"]
  48f0964c_1c25_e316_603f_d8c514e3fbc2 -->|defined in| e9f4993c_4935_9405_4fab_0bbc9030a673
  d05177b8_4cad_27b7_df18_d8a758cd2b20["tcpV4()"]
  d05177b8_4cad_27b7_df18_d8a758cd2b20 -->|calls| 48f0964c_1c25_e316_603f_d8c514e3fbc2
  07a73853_84f6_e5d8_e296_bfc3e041abe7["embeddedTcpClient()"]
  07a73853_84f6_e5d8_e296_bfc3e041abe7 -->|calls| 48f0964c_1c25_e316_603f_d8c514e3fbc2
  a98b7b6d_d138_64de_9c04_503805afe540["embeddedTcpServer()"]
  a98b7b6d_d138_64de_9c04_503805afe540 -->|calls| 48f0964c_1c25_e316_603f_d8c514e3fbc2
  6d1762df_74cf_d7e4_67fe_139dde76cada["tcpLargePayload()"]
  6d1762df_74cf_d7e4_67fe_139dde76cada -->|calls| 48f0964c_1c25_e316_603f_d8c514e3fbc2
  21c06fcc_dfd6_289d_561c_35429e8e3b0e["tcpZeroByteCaptured()"]
  21c06fcc_dfd6_289d_561c_35429e8e3b0e -->|calls| 48f0964c_1c25_e316_603f_d8c514e3fbc2
  f687d827_4bea_c30d_cc67_47c4b3263d1f["tcpZeroByteDiscarded()"]
  f687d827_4bea_c30d_cc67_47c4b3263d1f -->|calls| 48f0964c_1c25_e316_603f_d8c514e3fbc2
  style 48f0964c_1c25_e316_603f_d8c514e3fbc2 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

handler/src/test/java/io/netty/handler/pcap/PcapWriteHandlerTest.java lines 1202–1243

    private static void verifyTcpCloseCapture(ByteBuf byteBuf,
                                              InetSocketAddress serverAddr, InetSocketAddress clientAddr,
                                              int sequenceNumber, int ackNumber) {
        // Verify fin
        ByteBuf tcpPacket = verifyTcpBaseHeaders(byteBuf, serverAddr, 0);

        assertEquals(clientAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Source Port
        assertEquals(serverAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Destination Port
        assertEquals(sequenceNumber, tcpPacket.readUnsignedInt()); // Sequence number
        assertEquals(ackNumber, tcpPacket.readUnsignedInt()); // Ack number
        tcpPacket.readByte(); // Offset/Reserved
        assertEquals(17, tcpPacket.readByte()); // FIN+ACK control bit
        assertEquals(65535, tcpPacket.readUnsignedShort()); // Window Size
        assertEquals(1, tcpPacket.readUnsignedShort()); // Checksum
        assertEquals(0, tcpPacket.readUnsignedShort()); // Urgent Pointer

        // Verify fin+ack
        tcpPacket = verifyTcpBaseHeaders(byteBuf, clientAddr, 0);

        assertEquals(serverAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Source Port
        assertEquals(clientAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Destination Port
        assertEquals(ackNumber, tcpPacket.readUnsignedInt()); // Sequence number
        assertEquals(sequenceNumber, tcpPacket.readUnsignedInt()); // Ack number
        tcpPacket.readByte(); // Offset/Reserved
        assertEquals(17, tcpPacket.readByte()); // FIN+ACK control bit
        assertEquals(65535, tcpPacket.readUnsignedShort()); // Window Size
        assertEquals(1, tcpPacket.readUnsignedShort()); // Checksum
        assertEquals(0, tcpPacket.readUnsignedShort()); // Urgent Pointer

        // Verify ack
        tcpPacket = verifyTcpBaseHeaders(byteBuf, serverAddr, 0);

        assertEquals(clientAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Source Port
        assertEquals(serverAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Destination Port
        assertEquals(sequenceNumber + 1, tcpPacket.readUnsignedInt()); // Sequence number
        assertEquals(ackNumber + 1, tcpPacket.readUnsignedInt()); // Ack number
        tcpPacket.readByte(); // Offset/Reserved
        assertEquals(16, tcpPacket.readByte()); // ACK control bit
        assertEquals(65535, tcpPacket.readUnsignedShort()); // Window Size
        assertEquals(1, tcpPacket.readUnsignedShort()); // Checksum
        assertEquals(0, tcpPacket.readUnsignedShort()); // Urgent Pointer
    }

Domain

Subdomains

Defined In

Called By

Source

Frequently Asked Questions

What does verifyTcpCloseCapture() do?
verifyTcpCloseCapture() is a function in the netty codebase, defined in handler/src/test/java/io/netty/handler/pcap/PcapWriteHandlerTest.java.
Where is verifyTcpCloseCapture() defined?
verifyTcpCloseCapture() is defined in handler/src/test/java/io/netty/handler/pcap/PcapWriteHandlerTest.java at line 1202.
What calls verifyTcpCloseCapture()?
verifyTcpCloseCapture() is called by 6 function(s): embeddedTcpClient, embeddedTcpServer, tcpLargePayload, tcpV4, tcpZeroByteCaptured, tcpZeroByteDiscarded.

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