sandbox/mac/xpc_message_server.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SANDBOX_MAC_XPC_MESSAGE_SERVER_H_
   6 #define SANDBOX_MAC_XPC_MESSAGE_SERVER_H_
   7
   8 #include "base/mac/scoped_mach_port.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "sandbox/mac/message_server.h"
  11 #include "sandbox/mac/xpc.h"
  12 #include "sandbox/sandbox_export.h"
  13
  14 namespace sandbox {
  15
  16 class DispatchSourceMach;
  17
  18 // An implementation of MessageServer that uses XPC pipes to read and write XPC
  19 // messages from a Mach port.
  20 class SANDBOX_EXPORT XPCMessageServer : public MessageServer {
  21  public:
  22   // Creates a new XPC message server that will send messages to |demuxer|
  23   // for handling. If the |server_receive_right| is non-NULL, this class will
  24   // take ownership of the port and it will be used to receive messages.
  25   // Otherwise the server will create a new receive right on which to listen.
  26   XPCMessageServer(MessageDemuxer* demuxer,
  27                    mach_port_t server_receive_right);
  28   ~XPCMessageServer() override;
  29
  30   // MessageServer:
  31   bool Initialize() override;
  32   pid_t GetMessageSenderPID(IPCMessage request) override;
  33   IPCMessage CreateReply(IPCMessage request) override;
  34   bool SendReply(IPCMessage reply) override;
  35   void ForwardMessage(IPCMessage request, mach_port_t destination) override;
  36   // Creates an error reply message with a field "error" set to |error_code|.
  37   void RejectMessage(IPCMessage request, int error_code) override;
  38   mach_port_t GetServerPort() const override;
  39
  40  private:
  41   // Reads a message from the XPC pipe.
  42   void ReceiveMessage();
  43
  44   // The demuxer delegate. Weak.
  45   MessageDemuxer* demuxer_;
  46
  47   // The Mach port on which the server is receiving requests.
  48   base::mac::ScopedMachReceiveRight server_port_;
  49
  50   // MACH_RECV dispatch source that handles the |server_port_|.
  51   scoped_ptr<DispatchSourceMach> dispatch_source_;
  52
  53   // The reply message, if one has been created.
  54   xpc_object_t reply_message_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(XPCMessageServer);
  57 };
  58
  59 }  // namespace sandbox
  60
  61 #endif  // SANDBOX_MAC_XPC_MESSAGE_SERVER_H_