netty Architecture Docs
Home / Function/ verifyTcpHandshakeCapture() — netty Function Reference

verifyTcpHandshakeCapture() — netty Function Reference

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

Function java Buffer Allocators calls 1 called by 7

Entity Profile

Dependency Diagram

graph TD
  a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a["verifyTcpHandshakeCapture()"]
  e9f4993c_4935_9405_4fab_0bbc9030a673["PcapWriteHandlerTest"]
  a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a -->|defined in| e9f4993c_4935_9405_4fab_0bbc9030a673
  d05177b8_4cad_27b7_df18_d8a758cd2b20["tcpV4()"]
  d05177b8_4cad_27b7_df18_d8a758cd2b20 -->|calls| a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a
  07a73853_84f6_e5d8_e296_bfc3e041abe7["embeddedTcpClient()"]
  07a73853_84f6_e5d8_e296_bfc3e041abe7 -->|calls| a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a
  a98b7b6d_d138_64de_9c04_503805afe540["embeddedTcpServer()"]
  a98b7b6d_d138_64de_9c04_503805afe540 -->|calls| a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a
  6d1762df_74cf_d7e4_67fe_139dde76cada["tcpLargePayload()"]
  6d1762df_74cf_d7e4_67fe_139dde76cada -->|calls| a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a
  21c06fcc_dfd6_289d_561c_35429e8e3b0e["tcpZeroByteCaptured()"]
  21c06fcc_dfd6_289d_561c_35429e8e3b0e -->|calls| a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a
  f687d827_4bea_c30d_cc67_47c4b3263d1f["tcpZeroByteDiscarded()"]
  f687d827_4bea_c30d_cc67_47c4b3263d1f -->|calls| a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a
  39c4e83d_8291_f4fc_67f9_2ac9c9d08e03["tcpExceptionCaught()"]
  39c4e83d_8291_f4fc_67f9_2ac9c9d08e03 -->|calls| a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a
  a424c66d_5bc4_c81f_9a05_686817ee4de8["verifyGlobalHeaders()"]
  a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a -->|calls| a424c66d_5bc4_c81f_9a05_686817ee4de8
  style a21dcafa_3fd5_25fa_9ab3_64ba75a8e86a fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

handler/src/test/java/io/netty/handler/pcap/PcapWriteHandlerTest.java lines 1154–1200

    private static void verifyTcpHandshakeCapture(boolean verifyGlobalHeaders, ByteBuf byteBuf,
                                                  InetSocketAddress serverAddr, InetSocketAddress clientAddr) {
        if (verifyGlobalHeaders) {
            verifyGlobalHeaders(byteBuf);
        }

        // Verify syn

        ByteBuf tcpPacket = verifyTcpBaseHeaders(byteBuf, serverAddr, 0);

        assertEquals(clientAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Source Port
        assertEquals(serverAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Destination Port
        assertEquals(0, tcpPacket.readUnsignedInt()); // Sequence number
        assertEquals(0, tcpPacket.readUnsignedInt()); // Ack number
        tcpPacket.readByte(); // Offset/Reserved
        assertEquals(2, tcpPacket.readByte()); // SYN control bit
        assertEquals(65535, tcpPacket.readUnsignedShort()); // Window Size
        assertEquals(1, tcpPacket.readUnsignedShort()); // Checksum
        assertEquals(0, tcpPacket.readUnsignedShort()); // Urgent Pointer

        // Verify syn+ack

        tcpPacket = verifyTcpBaseHeaders(byteBuf, clientAddr, 0);

        assertEquals(serverAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Source Port
        assertEquals(clientAddr.getPort() & 0xffff, tcpPacket.readUnsignedShort()); // Destination Port
        assertEquals(0, tcpPacket.readUnsignedInt()); // Sequence number
        assertEquals(1, tcpPacket.readUnsignedInt()); // Ack number
        tcpPacket.readByte(); // Offset/Reserved
        assertEquals(18, tcpPacket.readByte()); // SYN+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(1, tcpPacket.readUnsignedInt()); // Sequence number
        assertEquals(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

Calls

Called By

Source

Frequently Asked Questions

What does verifyTcpHandshakeCapture() do?
verifyTcpHandshakeCapture() is a function in the netty codebase, defined in handler/src/test/java/io/netty/handler/pcap/PcapWriteHandlerTest.java.
Where is verifyTcpHandshakeCapture() defined?
verifyTcpHandshakeCapture() is defined in handler/src/test/java/io/netty/handler/pcap/PcapWriteHandlerTest.java at line 1154.
What does verifyTcpHandshakeCapture() call?
verifyTcpHandshakeCapture() calls 1 function(s): verifyGlobalHeaders.
What calls verifyTcpHandshakeCapture()?
verifyTcpHandshakeCapture() is called by 7 function(s): embeddedTcpClient, embeddedTcpServer, tcpExceptionCaught, tcpLargePayload, tcpV4, tcpZeroByteCaptured, tcpZeroByteDiscarded.

Analyze Your Own Codebase

Get architecture documentation, dependency graphs, and domain analysis for your codebase in minutes.

Try Supermodel Free