syntax = "proto3";

package envoy.api.v2;

import "google/protobuf/wrappers.proto";

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

message Pipe {
  string path = 1;
}

// Unresolved addresses contain either named hosts or ports that require
// resolution via DNS or an optional custom Resolver.
message UnresolvedAddress {
  message NamedAddress {
    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 {
      google.protobuf.UInt32Value port = 3;
      string service_name = 4;
    }
  }
  // Support pluggable resolvers.
  message Resolver {
    // Name of the resolver. This must have been registered with Envoy.
    string name = 1;
    // TODO(htuch): Do we need further extensibility or should we collapse
    // Resolver to a string?
  }
  // If not specified, the default DNS resolver is used.
  Resolver resolver = 1;
  oneof address {
    NamedAddress named_address = 2;
    Pipe pipe = 3;
  }
}

message UnresolvedAddresses {
  repeated UnresolvedAddress addresses = 1;
}

// A ResolvedAddress identifies a concrete socket or UDS path and is not subject
// to further resolution via DNS or custom resolvers.
message ResolvedAddress {
  message SocketAddress {
    enum Protocol {
      TCP = 0;
    }
    Protocol protocol = 1;
    string ip_address = 2;
    google.protobuf.UInt32Value port = 3;
  }
  oneof address {
    SocketAddress socket_address = 2;
    Pipe pipe = 3;
  }
}

message ResolvedAddresses {
  repeated ResolvedAddress addresses = 1;
}