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HandleWin is a wrapper around a Windows HANDLE that can be transported across IPC channels that support attachment brokering. The attachment broker is responsible for duplicating the HANDLE into the destination process. BUG=493414 Review URL: https://codereview.chromium.org/1281083004 Cr-Commit-Position: refs/heads/master@{#342897}
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| // Copyright 2015 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. | ||
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| #include "ipc/handle_win.h" | ||
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| #include "base/logging.h" | ||
| #include "base/memory/ref_counted.h" | ||
| #include "base/strings/string_number_conversions.h" | ||
| #include "ipc/handle_attachment_win.h" | ||
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| namespace IPC { | ||
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| HandleWin::HandleWin(const HANDLE& handle, Permissions permissions) | ||
| : handle_(handle), permissions_(permissions) {} | ||
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| // static | ||
| void ParamTraits<HandleWin>::Write(Message* m, const param_type& p) { | ||
| scoped_refptr<IPC::internal::HandleAttachmentWin> attachment( | ||
| new IPC::internal::HandleAttachmentWin(p.get_handle(), | ||
| p.get_permissions())); | ||
| if (!m->WriteAttachment(attachment.Pass())) | ||
| NOTREACHED(); | ||
| } | ||
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| // static | ||
| bool ParamTraits<HandleWin>::Read(const Message* m, | ||
| base::PickleIterator* iter, | ||
| param_type* r) { | ||
| scoped_refptr<MessageAttachment> attachment; | ||
| if (!m->ReadAttachment(iter, &attachment)) | ||
| return false; | ||
| if (attachment->GetType() != MessageAttachment::TYPE_BROKERABLE_ATTACHMENT) | ||
| return false; | ||
| BrokerableAttachment* brokerable_attachment = | ||
| static_cast<BrokerableAttachment*>(attachment.get()); | ||
| if (brokerable_attachment->GetBrokerableType() != | ||
| BrokerableAttachment::WIN_HANDLE) { | ||
| return false; | ||
| } | ||
| IPC::internal::HandleAttachmentWin* handle_attachment = | ||
| static_cast<IPC::internal::HandleAttachmentWin*>(brokerable_attachment); | ||
| r->set_handle(handle_attachment->get_handle()); | ||
| return true; | ||
| } | ||
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| // static | ||
| void ParamTraits<HandleWin>::Log(const param_type& p, std::string* l) { | ||
| l->append(base::StringPrintf("0x%X", p.get_handle())); | ||
| l->append(base::IntToString(p.get_permissions())); | ||
| } | ||
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| } // namespace IPC |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| // Copyright 2015 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. | ||
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| #ifndef IPC_HANDLE_WIN_H_ | ||
| #define IPC_HANDLE_WIN_H_ | ||
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| #include <windows.h> | ||
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| #include "ipc/ipc_export.h" | ||
| #include "ipc/ipc_message_macros.h" | ||
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| namespace IPC { | ||
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| // HandleWin is a wrapper around a Windows HANDLE that can be transported | ||
| // across Chrome IPC channels that support attachment brokering. The HANDLE will | ||
| // be duplicated into the destination process. | ||
| class IPC_EXPORT HandleWin { | ||
| public: | ||
| enum Permissions { | ||
| // A placeholder value to be used by the receiving IPC channel, since the | ||
| // permissions information is only used by the broker process. | ||
| INVALID, | ||
| // The new HANDLE will have the same permissions as the old HANDLE. | ||
| DUPLICATE, | ||
| // The new HANDLE will have file read and write permissions. | ||
| FILE_READ_WRITE, | ||
| MAX_PERMISSIONS = FILE_READ_WRITE | ||
| }; | ||
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| HandleWin(const HANDLE& handle, Permissions permissions); | ||
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| HANDLE get_handle() const { return handle_; } | ||
| void set_handle(HANDLE handle) { handle_ = handle; } | ||
| Permissions get_permissions() const { return permissions_; } | ||
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| private: | ||
| HANDLE handle_; | ||
| Permissions permissions_; | ||
| }; | ||
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| template <> | ||
| struct IPC_EXPORT ParamTraits<HandleWin> { | ||
| typedef HandleWin param_type; | ||
| static void Write(Message* m, const param_type& p); | ||
| static bool Read(const Message* m, base::PickleIterator* iter, param_type* p); | ||
| static void Log(const param_type& p, std::string* l); | ||
| }; | ||
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| } // namespace IPC | ||
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| #endif // IPC_HANDLE_WIN_H_ |
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