syntax = "proto3";

package envoy.api.v2;

import "google/protobuf/wrappers.proto";

// [V2-API-DIFF] Addresses now have .proto structure.

message Pipe {
  string path = 1;
}

// Addresses specify either a logical or physical address and port, which are
// used to tell Envoy where to bind/listen, connect to upstream and find
// management servers. They may optionally name a resolver that will be used at
// runtime for further transformation. Resolution may also be performed in a
// context dependent manner, e.g. when an Address is used for an upstream
// logical DNS host.
message Address {
  message SocketAddress {
    enum Protocol {
      TCP = 0;
    }
    Protocol protocol = 1;
    // For listeners, an empty address implies a bind to 0.0.0.0 or ::. It's
    // still possible to distinguish on address via the prefix/suffix matching
    // in FilterChainMatch after connection.
    // For clusters, an address may be either an IP or hostname to be resolved via
    // DNS.
    string address = 2;
    oneof port_specifier {
      uint32 port_value = 3;
      // This is only valid if DNS SRV or if resolver_name is specified below
      // and the named resolver is capable of named port resolution.
      string named_port = 4;
    }
  }
  // Name of the resolver. This must have been registered with Envoy. If this is
  // empty, a context dependent default applies. If the address is expected to
  // be a hostname, it will be DNS resolution. If the address is expected to be
  // a concrete IP address, no resolution will occur.
  string resolver_name = 1;
  oneof address {
    SocketAddress named_address = 2;
    Pipe pipe = 3;
  }
}