setIPv4() — netty Function Reference

Architecture documentation for the setIPv4() function in SockaddrIn.java from the netty codebase.

Function java Buffer Telemetry calls 1 called by 1

Entity Profile

Buffer→ Telemetry→ setIPv4() — netty Function Reference

Dependency Diagram

graph TD
  49e528c6_f32d_db4a_bdde_2756711da5e2["setIPv4()"]
  0a4fbaf2_1e5c_bc5c_2cfb_5db23e53ba6c["SockaddrIn"]
  49e528c6_f32d_db4a_bdde_2756711da5e2 -->|defined in| 0a4fbaf2_1e5c_bc5c_2cfb_5db23e53ba6c
  505efae1_6ca9_d888_e0bd_f38ddda740d0["set()"]
  505efae1_6ca9_d888_e0bd_f38ddda740d0 -->|calls| 49e528c6_f32d_db4a_bdde_2756711da5e2
  66acc2f9_19b1_a6f4_38ea_a96b0fbdd651["handleNetworkOrder()"]
  49e528c6_f32d_db4a_bdde_2756711da5e2 -->|calls| 66acc2f9_19b1_a6f4_38ea_a96b0fbdd651
  style 49e528c6_f32d_db4a_bdde_2756711da5e2 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

transport-classes-io_uring/src/main/java/io/netty/channel/uring/SockaddrIn.java lines 61–86

    static int setIPv4(ByteBuffer memory, InetAddress address, int port) {
        int position = memory.position();
        memory.mark();
        try {
            // memset
            memory.put(SOCKADDR_IN_EMPTY_ARRAY);

            memory.putShort(position + Native.SOCKADDR_IN_OFFSETOF_SIN_FAMILY, Native.AF_INET);
            memory.putShort(position + Native.SOCKADDR_IN_OFFSETOF_SIN_PORT, handleNetworkOrder(memory.order(),
                    (short) port));

            byte[] bytes = address.getAddress();
            int offset = 0;
            if (bytes.length == IPV6_ADDRESS_LENGTH) {
                // IPV6 mapped IPV4 address, we only need the last 4 bytes.
                offset = IPV4_MAPPED_IPV6_PREFIX.length;
            }
            assert bytes.length == offset + IPV4_ADDRESS_LENGTH;
            memory.position(position + Native.SOCKADDR_IN_OFFSETOF_SIN_ADDR + Native.IN_ADDRESS_OFFSETOF_S_ADDR);
            memory.put(bytes, offset, IPV4_ADDRESS_LENGTH);
            return Native.SIZEOF_SOCKADDR_IN;
        } finally {
            // Restore position as we did change it via memory.put(byte[]...).
            memory.reset();
        }
    }