Implementation Details

The max_allowed_packet setting for the MySQL protocol can now be configured via the ldbc Connector. This enables enhanced security and optimised performance.

1. Enhanced Security

• Prevention of memory exhaustion attacks: Protects against memory consumption attacks using massive packets
• Prevention of DoS attacks: Blocks denial-of-service attacks involving large data transmissions
• MySQL JDBC Driver compliance: Ensures compatibility with industry-standard security practices

2. Operational Flexibility

• Adjustments based on application requirements: Relaxing restrictions for applications handling BLOBs or large volumes of data
• Resource usage control: Enabling predictable memory usage and optimizing operational costs
• Compliance with protocol specifications: Ensuring configurations remain within the MySQL specification's 16MB limit

// Conservative security settings (64KB - default)
val secureConfig = MySQLConfig.default
  .setMaxAllowedPacket(65535) // MySQL JDBC Driver Compatible

// For applications handling BLOBs and large amounts of data
val dataIntensiveConfig = MySQLConfig.default
  .setMaxAllowedPacket(16777215) // 16MB (Maximum Protocol)

Fixes

Fixes #xxxxx

Pull Request Checklist

• Wrote unit and integration tests
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code formatting by scalafmt (sbt scalafmtAll command execution)
• Add copyright headers to new files

References