Dynamic Modules

• v3 API reference

The Dynamic Modules UDP listener filter allows you to write UDP listener filters in a dynamic module. This can be used to implement custom UDP handling logic, such as:

• Inspecting UDP datagrams.

• Modifying UDP datagrams.

• Dropping UDP datagrams.

• Sending responses directly from the filter (e.g., for DNS).

The filter is configured using the DynamicModuleUdpListenerFilter message.

listener_filters:
- name: envoy.filters.udp_listener.dynamic_modules
  typed_config:
    "@type": type.googleapis.com/envoy.extensions.filters.udp.dynamic_modules.v3.DynamicModuleUdpListenerFilter
    dynamic_module_config:
      name: my_module
      entry_point: envoy_dynamic_module_on_program_init
    filter_name: my_udp_filter
    filter_config:
      "@type": type.googleapis.com/google.protobuf.StringValue
      value: "my_config"

For more details on dynamic modules, see the architecture overview.