Move services/shell to services/service_manager

services/shell/public/interfaces/connector.mojom

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-module shell.mojom;
-
-import "services/shell/public/interfaces/interface_provider.mojom";
-
-const string kRootUserID = "505C0EE9-3013-43C0-82B0-A84F50CF8D84";
-const string kInheritUserID = "D26290E4-4485-4EAE-81A2-66D1EEB40A9D";
-
-const uint32 kInvalidInstanceID = 0;
-
-enum ConnectResult {
-  // The connection was established successfully.
-  SUCCEEDED,
-
-  // The name or user id supplied was malformed, or the application specified
-  // by |name| could not be loaded.
-  INVALID_ARGUMENT,
-
-  // The connection was blocked by policy. Either connections to |name| are
-  // forbidden from this app by the CapabilityFilter, or the application
-  // attempted to connect using a user id other than its own,
-  // kInheritUserID or kRootUserID.
-  ACCESS_DENIED
-};
-
-// A collection of metadata that disambiguates instances in the shell.
-struct Identity {
-  // A mojo: or exe: name identifying an application.
-  string name;
-
-  // The user id of the target application instance to connect to. If no such
-  // instance exists, the shell may start one. This user id will be passed to
-  // the new instance via Initialize().
-  // When connecting to other applications, applications must generally pass
-  // kInheritUserID for this value, and the shell will either connect to an
-  // existing instance matching the caller's user id, create a new instance
-  // matching the caller's user id, or connect to an existing instance running
-  // as kRootUserID. By default, applications do not have the ability to set
-  // arbitrary values to this field, and doing so will result in a connection
-  // error on the remote service provider. An application with the ability to
-  // launch applications with arbitrary user ids (e.g. a login app) may set this
-  // value to something meaningful to it. The user id string is a valid guid of
-  // the form "%08X-%04X-%04X-%04X-%012llX", and (aside from the root user whose
-  // guid is defined above) intended to be not-guessable.
-  // When an application is initialized or receives a connection from another
-  // application, this value is always the resolved user id, never
-  // kInheritUserID.
-  string user_id;
-
-  // An application may spawn multiple instances with the same name,user_id
-  // pair, provided they are started with unique values of this field.
-  // TODO(beng): enforce the emptiness of this parameter unless the client bears
-  //             the appropriate capability.
-  string instance;
-};
-
-// Implemented by an object in the shell associated with a specific instance.
-// Tells it the PID for a process launched by the client. See
-// ClientProcessConnection.
-interface PIDReceiver {
-  SetPID(uint32 pid);
-};
-
-// Typically, the shell will start a process for a service the first time it
-// receives a connection request for it. This struct allows a client to start
-// the process itself and provide the shell the pipes it needs to communicate
-// with it. When an instance of this struct is supplied to Connect(), the client
-// owns the lifetime of the child process, not the shell. The shell binds the
-// |service| pipe, and when it closes destroys the associated  instance but
-// the process stays alive.
-struct ClientProcessConnection {
-  // Provides the shell the ability to bind a Service from the client process to
-  // the instance it creates.
-  handle<message_pipe> service;
-
-  // Allows the client process launcher to tell the shell the PID of the process
-  // it created (the pid isn't supplied directly here as the process may not
-  // have been launched by the time Connect() is called.)
-  handle<message_pipe> pid_receiver_request;
-};
-
-// Encapsulates establishing connections with other Services.
-interface Connector {
-  // Requests a connection with another application. The application originating
-  // the request is referred to as the "source" and the one receiving the
-  // "target".
-  //
-  // The connection is embodied by a pair of message pipes binding the
-  // InterfaceProvider interface, which allows both the source and target
-  // applications to export interfaces to one another. The interfaces bound via
-  // these InterfaceProviders are brokered by the shell according to the
-  // security policy defined by each application in its manifest .
-  //
-  // If the target application is not running, the shell will run it, calling
-  // its Initialize() method before completing the connection.
-  //
-  // Parameters:
-  //
-  //  target
-  //    Identifies the target application instance to connect to.
-  //
-  //  remote_interfaces
-  //    Allows the source application access to interface implementations
-  //    exposed by the target application. The interfaces accessible via this
-  //    InterfaceParameter are filtered by the security policy described by the
-  //    source and target application manifests.
-  //
-  //  client_process_connection
-  //    When non-null, supplies control pipes the shell can use to bind a
-  //    process created by the client, instead of creating one itself.
-  //    TODO(beng): access to this parameter should be restricted by a
-  //                capability.
-  //
-  // Response parameters:
-  //
-  //  result
-  //    Indicates the result of the Connect() operation.
-  //
-  //  user_id
-  //    The user id the shell ran the target application as. Typically a client
-  //    passes kInheritUserID as the user id to Connect() which is resolved by
-  //    the shell into a valid user id returned through this callback.
-  //
-  Connect(Identity target,
-          InterfaceProvider&? remote_interfaces,
-          ClientProcessConnection? client_process_connection) =>
-      (ConnectResult result, string user_id);
-
-  // Clones this Connector so it can be passed to another thread.
-  Clone(Connector& request);
-};