getConnVariableHeaderFlag() — netty Function Reference

Architecture documentation for the getConnVariableHeaderFlag() function in MqttEncoder.java from the netty codebase.

Function java Buffer Allocators called by 1

Entity Profile

Buffer→ Allocators→ getConnVariableHeaderFlag() — netty Function Reference

Dependency Diagram

graph TD
  ccba0eb6_25da_af9a_b7d6_926ed2ffd985["getConnVariableHeaderFlag()"]
  13c11c97_f8b9_b829_dd75_63846e7fcd55["MqttEncoder"]
  ccba0eb6_25da_af9a_b7d6_926ed2ffd985 -->|defined in| 13c11c97_f8b9_b829_dd75_63846e7fcd55
  a7b9925d_5111_9e2c_2e13_04e1c42819fc["ByteBuf()"]
  a7b9925d_5111_9e2c_2e13_04e1c42819fc -->|calls| ccba0eb6_25da_af9a_b7d6_926ed2ffd985
  style ccba0eb6_25da_af9a_b7d6_926ed2ffd985 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-mqtt/src/main/java/io/netty/handler/codec/mqtt/MqttEncoder.java lines 240–259

    private static int getConnVariableHeaderFlag(MqttConnectVariableHeader variableHeader) {
        int flagByte = 0;
        if (variableHeader.hasUserName()) {
            flagByte |= 0x80;
        }
        if (variableHeader.hasPassword()) {
            flagByte |= 0x40;
        }
        if (variableHeader.isWillRetain()) {
            flagByte |= 0x20;
        }
        flagByte |= (variableHeader.willQos() & 0x03) << 3;
        if (variableHeader.isWillFlag()) {
            flagByte |= 0x04;
        }
        if (variableHeader.isCleanSession()) {
            flagByte |= 0x02;
        }
        return flagByte;
    }