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