syntax = "proto3";

package envoy.api.v2;

import "google/protobuf/wrappers.proto";

import "validate/validate.proto";

// [#protodoc-title: Network addresses]
// [#v2-api-diff: Addresses now have .proto structure.]

message Pipe {
  // Unix Domain Socket path.
  string path = 1 [(validate.rules).string.min_len = 1];
}

message SocketAddress {
  enum Protocol {
    TCP = 0;
    // [#not-implemented-hide:]
    UDP = 1;
  }
  Protocol protocol = 1 [(validate.rules).enum = {in: [0]}];
  // The address for this socket. :ref:`Listeners <config_listeners>` will bind
  // to the address or outbound connections will be made. An empty address
  // implies a bind to 0.0.0.0 or ::. It's still possible to distinguish on an
  // address via the prefix/suffix matching in FilterChainMatch after connection.
  // For :ref:`clusters <config_cluster_manager_cluster>`, an address may be
  // either an IP or hostname to be resolved via DNS. If it is a hostname,
  // :ref:`resolver_name <envoy_api_field_SocketAddress.resolver_name>` should
  // be set unless default (i.e. DNS) resolution is expected.
  string address = 2;
  oneof port_specifier {
    option (validate.required) = true;
    uint32 port_value = 3;
    // This is only valid if :ref:`resolver_name
    // <envoy_api_field_SocketAddress.resolver_name>` is specified below and the
    // named resolver is capable of named port resolution.
    string named_port = 4;
  }
  // The name of the resolver. This must have been registered with Envoy. If this is
  // empty, a context dependent default applies. If address is a hostname this
  // should be set for resolution other than DNS. If the address is a concrete
  // IP address, no resolution will occur.
  string resolver_name = 5;
}

message BindConfig {
  // The address to bind to when creating a socket.
  SocketAddress source_address = 1 [(validate.rules).message.required = true];
}

// 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.
message Address {
  oneof address {
    option (validate.required) = true;
    SocketAddress socket_address = 1;
    Pipe pipe = 2;
  }
}

// CidrRange specifies an IP Address and a prefix length to construct
// the subnet mask for a `CIDR <https://tools.ietf.org/html/rfc4632>`_ range.
message CidrRange {
  // IPv4 or IPv6 address, e.g. 192.0.0.0 or 2001:db8::.
  string address_prefix = 1 [(validate.rules).string.min_len = 1];
  // Length of prefix, e.g. 0, 32.
  google.protobuf.UInt32Value prefix_len = 2 [(validate.rules).uint32.lte = 128];
}