proxy_connect_udp_http3_downstream.yaml

# This will forward CONNECT-UDP requests from a downstream connecting on 127.0.0.1:10001 to an
# upstream listening on 127.0.0.1:10002.
static_resources:
  listeners:
  - name: listener_0
    address:
      socket_address:
        protocol: UDP
        address: 127.0.0.1
        port_value: 10001
    udp_listener_config:
      quic_options: {}
      downstream_socket_config:
        prefer_gro: true
    filter_chains:
    - transport_socket:
        name: envoy.transport_sockets.quic
        typed_config:
          '@type': type.googleapis.com/envoy.extensions.transport_sockets.quic.v3.QuicDownstreamTransport
          downstream_tls_context:
            common_tls_context:
              tls_certificates:
              - certificate_chain:
                  filename: certs/servercert.pem
                private_key:
                  filename: certs/serverkey.pem
      filters:
      - name: envoy.filters.network.http_connection_manager
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
          codec_type: HTTP3
          stat_prefix: ingress_http
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains:
              - "*"
              routes:
              - match:
                  connect_matcher:
                    {}
                route:
                  cluster: cluster_0
          http_filters:
          - name: envoy.filters.http.router
            typed_config:
              "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
          http3_protocol_options:
            allow_extended_connect: true
          upgrade_configs:
          - upgrade_type: CONNECT-UDP
  clusters:
  - name: cluster_0
    typed_extension_protocol_options:
      envoy.extensions.upstreams.http.v3.HttpProtocolOptions:
        "@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions
        explicit_http_config:
          http3_protocol_options:
            allow_extended_connect: true
            quic_protocol_options:
              # Increase the max packet length for tunneling.
              # The example value matches the default value used by the MASQUE client in QUICHE.
              max_packet_length: 1350
    load_assignment:
      cluster_name: cluster_0
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: 127.0.0.1
                port_value: 10002
    transport_socket:
      name: envoy.transport_sockets.quic
      typed_config:
        "@type": type.googleapis.com/envoy.extensions.transport_sockets.quic.v3.QuicUpstreamTransport
        upstream_tls_context:
          # SAN of the certs/servercert.pem used for local testing. Update this if using a different certificate.
          sni: lyft.com