istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pilot/pkg/networking/networking.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package networking
    16  
    17  import (
    18  	core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
    19  
    20  	"istio.io/istio/pkg/config/protocol"
    21  )
    22  
    23  // ListenerProtocol is the protocol associated with the listener.
    24  type ListenerProtocol int
    25  
    26  const (
    27  	// ListenerProtocolUnknown is an unknown type of listener.
    28  	ListenerProtocolUnknown = iota
    29  	// ListenerProtocolTCP is a TCP listener.
    30  	ListenerProtocolTCP
    31  	// ListenerProtocolHTTP is an HTTP listener.
    32  	ListenerProtocolHTTP
    33  	// ListenerProtocolAuto enables auto protocol detection
    34  	ListenerProtocolAuto
    35  )
    36  
    37  // ModelProtocolToListenerProtocol converts from a config.Protocol to its corresponding plugin.ListenerProtocol
    38  func ModelProtocolToListenerProtocol(p protocol.Instance) ListenerProtocol {
    39  	switch p {
    40  	case protocol.HTTP, protocol.HTTP2, protocol.HTTP_PROXY, protocol.GRPC, protocol.GRPCWeb:
    41  		return ListenerProtocolHTTP
    42  	case protocol.TCP, protocol.HTTPS, protocol.TLS,
    43  		protocol.Mongo, protocol.Redis, protocol.MySQL:
    44  		return ListenerProtocolTCP
    45  	case protocol.UDP:
    46  		return ListenerProtocolUnknown
    47  	case protocol.Unsupported:
    48  		return ListenerProtocolAuto
    49  	default:
    50  		// Should not reach here.
    51  		return ListenerProtocolAuto
    52  	}
    53  }
    54  
    55  type TransportProtocol uint8
    56  
    57  const (
    58  	// TransportProtocolTCP is a TCP listener
    59  	TransportProtocolTCP = iota
    60  	// TransportProtocolQUIC is a QUIC listener
    61  	TransportProtocolQUIC
    62  )
    63  
    64  func (tp TransportProtocol) String() string {
    65  	switch tp {
    66  	case TransportProtocolTCP:
    67  		return "tcp"
    68  	case TransportProtocolQUIC:
    69  		return "quic"
    70  	}
    71  	return "unknown"
    72  }
    73  
    74  func (tp TransportProtocol) ToEnvoySocketProtocol() core.SocketAddress_Protocol {
    75  	if tp == TransportProtocolQUIC {
    76  		return core.SocketAddress_UDP
    77  	}
    78  	return core.SocketAddress_TCP
    79  }
    80  
    81  // ListenerClass defines the class of the listener
    82  type ListenerClass int
    83  
    84  const (
    85  	ListenerClassUndefined ListenerClass = iota
    86  	ListenerClassSidecarInbound
    87  	ListenerClassSidecarOutbound
    88  	ListenerClassGateway
    89  )