syntax = "proto3";

import "google/protobuf/duration.proto";

option java_multiple_files = true;
option java_package = 'com.wireguard.android.backend.gen';
option java_outer_classname = "LibwgProto";
option java_generic_services = true;
option go_package = 'golang.zx2c4.com/wireguard/android/gen';

package api;

service Libwg {
	rpc StopGrpc(StopGrpcRequest) returns (StopGrpcResponse);
	rpc Version(VersionRequest) returns (VersionResponse);
	rpc StartHttpProxy(StartHttpProxyRequest) returns (StartHttpProxyResponse);
	rpc StopHttpProxy(StopHttpProxyRequest) returns (StopHttpProxyResponse);
	rpc Reverse(stream ReverseRequest) returns (stream ReverseResponse);
	rpc IpcSet(IpcSetRequest) returns (IpcSetResponse);
	rpc Dhcp(DhcpRequest) returns (DhcpResponse);
        rpc CapabilitiesChanged(CapabilitiesChangedRequest) returns (CapabilitiesChangedResponse);
}

message TunnelHandle { int32 handle = 1; }

message Error {
	enum Code {
		NO_ERROR = 0;
		UNSPECIFIED = 1;
		INVALID_PROTOCOL_BUFFER = 2;
		INVALID_RESPONSE = 3;
	}
	Code code = 1;
	string message = 2;
}

message InetAddress {
	bytes address = 1;
}

message InetSocketAddress {
	InetAddress address = 1;
	uint32 port = 2;
}

message StopGrpcRequest {
}

message StopGrpcResponse {
}

message VersionRequest {
}

message VersionResponse {
	string version = 1;
}

message StartHttpProxyRequest {
	oneof pacFile {
		string pacFileUrl = 1;
		string pacFileContent = 2;
        }
}

message StartHttpProxyResponse {
	uint32 listen_port = 1;
	Error error = 2;
}

message StopHttpProxyRequest {
}

message StopHttpProxyResponse {
	Error error = 1;
}

message ReverseRequest {
	oneof response {
		GetConnectionOwnerUidResponse uid = 1;
	}
}

message ReverseResponse {
	oneof request {
		GetConnectionOwnerUidRequest uid = 1;
	}
}

message GetConnectionOwnerUidRequest {
	// ConnectivityManager.getConnectionOwnerUid(int protocol,
	//     InetSocketAddress local, InetSocketAddress remote)
	int32 protocol = 1;
	InetSocketAddress local = 2;
	InetSocketAddress remote = 3;
}

message GetConnectionOwnerUidResponse {
	int32 uid = 1;
	string package = 2; // context.getPackageManager().getNameForUid()
}

message IpcSetRequest {
	TunnelHandle tunnel = 1;
	string config = 2;
}

message IpcSetResponse {
	Error error = 1;
}

message Lease {
        InetAddress address = 1;
        google.protobuf.Duration preferred_lifetime = 2;
        google.protobuf.Duration valid_lifetime = 3;
}

message DhcpRequest {
        InetAddress relay = 1;
        InetAddress source = 2;
}

message DhcpResponse { 
       Error error = 1;
       repeated Lease leases = 2;
}

message CapabilitiesChangedRequest {
        enum Capability {
                NONE = 0;
                NOT_METERED = 11;
        };

        repeated Capability capabilities = 1;
}

message CapabilitiesChangedResponse {
        Error error = 1;
}