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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "mojo/edk/system/channel.h" | 5 #include "mojo/edk/system/channel.h" |
6 | 6 |
7 #include <stddef.h> | 7 #include <stddef.h> |
8 #include <string.h> | 8 #include <string.h> |
9 | 9 |
10 #include <algorithm> | 10 #include <algorithm> |
11 #include <limits> | 11 #include <limits> |
12 #include <utility> | 12 #include <utility> |
13 | 13 |
14 #include "base/macros.h" | 14 #include "base/macros.h" |
15 #include "base/memory/aligned_memory.h" | 15 #include "base/memory/aligned_memory.h" |
16 #include "base/process/process_handle.h" | 16 #include "base/process/process_handle.h" |
| 17 #include "mojo/edk/embedder/embedder_internal.h" |
17 #include "mojo/edk/embedder/platform_handle.h" | 18 #include "mojo/edk/embedder/platform_handle.h" |
18 | 19 |
19 #if defined(OS_MACOSX) && !defined(OS_IOS) | 20 #if defined(OS_MACOSX) && !defined(OS_IOS) |
20 #include "base/mac/mach_logging.h" | 21 #include "base/mac/mach_logging.h" |
21 #elif defined(OS_WIN) | 22 #elif defined(OS_WIN) |
22 #include "base/win/win_util.h" | 23 #include "base/win/win_util.h" |
23 #endif | 24 #endif |
24 | 25 |
25 namespace mojo { | 26 namespace mojo { |
26 namespace edk { | 27 namespace edk { |
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38 "LegacyHeader must be 8 bytes on ChromeOS and Android"); | 39 "LegacyHeader must be 8 bytes on ChromeOS and Android"); |
39 | 40 |
40 static_assert(offsetof(Channel::Message::LegacyHeader, num_bytes) == | 41 static_assert(offsetof(Channel::Message::LegacyHeader, num_bytes) == |
41 offsetof(Channel::Message::Header, num_bytes), | 42 offsetof(Channel::Message::Header, num_bytes), |
42 "num_bytes should be at the same offset in both Header structs."); | 43 "num_bytes should be at the same offset in both Header structs."); |
43 static_assert(offsetof(Channel::Message::LegacyHeader, message_type) == | 44 static_assert(offsetof(Channel::Message::LegacyHeader, message_type) == |
44 offsetof(Channel::Message::Header, message_type), | 45 offsetof(Channel::Message::Header, message_type), |
45 "message_type should be at the same offset in both Header " | 46 "message_type should be at the same offset in both Header " |
46 "structs."); | 47 "structs."); |
47 | 48 |
| 49 bool g_use_legacy_protocol = false; |
| 50 |
48 } // namespace | 51 } // namespace |
49 | 52 |
50 const size_t kReadBufferSize = 4096; | 53 const size_t kReadBufferSize = 4096; |
51 const size_t kMaxUnusedReadBufferCapacity = 4096; | 54 const size_t kMaxUnusedReadBufferCapacity = 4096; |
52 const size_t kMaxChannelMessageSize = 256 * 1024 * 1024; | 55 const size_t kMaxChannelMessageSize = 256 * 1024 * 1024; |
53 const size_t kMaxAttachedHandles = 128; | 56 const size_t kMaxAttachedHandles = 128; |
54 | 57 |
55 Channel::Message::Message(size_t payload_size, size_t max_handles) | 58 Channel::Message::Message(size_t payload_size, size_t max_handles) |
56 #if defined(MOJO_EDK_LEGACY_PROTOCOL) | 59 : Message(payload_size, |
57 : Message(payload_size, max_handles, MessageType::NORMAL_LEGACY) { | 60 max_handles, |
58 } | 61 g_use_legacy_protocol ? MessageType::NORMAL_LEGACY |
59 #else | 62 : MessageType::NORMAL) {} |
60 : Message(payload_size, max_handles, MessageType::NORMAL) { | |
61 } | |
62 #endif | |
63 | 63 |
64 Channel::Message::Message(size_t payload_size, | 64 Channel::Message::Message(size_t payload_size, |
65 size_t max_handles, | 65 size_t max_handles, |
66 MessageType message_type) | 66 MessageType message_type) |
67 : max_handles_(max_handles) { | 67 : max_handles_(max_handles) { |
68 DCHECK_LE(max_handles_, kMaxAttachedHandles); | 68 DCHECK_LE(max_handles_, kMaxAttachedHandles); |
69 | 69 |
70 const bool is_legacy_message = (message_type == MessageType::NORMAL_LEGACY); | 70 const bool is_legacy_message = (message_type == MessageType::NORMAL_LEGACY); |
71 size_t extra_header_size = 0; | 71 size_t extra_header_size = 0; |
72 #if defined(OS_WIN) | 72 #if defined(OS_WIN) |
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388 ++it; | 388 ++it; |
389 } | 389 } |
390 } | 390 } |
391 } | 391 } |
392 return std::move(handle_vector_); | 392 return std::move(handle_vector_); |
393 #else | 393 #else |
394 return std::move(handle_vector_); | 394 return std::move(handle_vector_); |
395 #endif | 395 #endif |
396 } | 396 } |
397 | 397 |
| 398 // static |
| 399 void Channel::Message::SetUseLegacyTransportProtocol(bool use_legacy_protocol) { |
| 400 // Make sure this is called before mojo::edk::Init() is called. |
| 401 DCHECK(!internal::g_core); |
| 402 g_use_legacy_protocol = use_legacy_protocol; |
| 403 } |
| 404 |
398 #if defined(OS_WIN) | 405 #if defined(OS_WIN) |
399 // static | 406 // static |
400 bool Channel::Message::RewriteHandles(base::ProcessHandle from_process, | 407 bool Channel::Message::RewriteHandles(base::ProcessHandle from_process, |
401 base::ProcessHandle to_process, | 408 base::ProcessHandle to_process, |
402 PlatformHandleVector* handles) { | 409 PlatformHandleVector* handles) { |
403 bool success = true; | 410 bool success = true; |
404 for (size_t i = 0; i < handles->size(); ++i) { | 411 for (size_t i = 0; i < handles->size(); ++i) { |
405 if (!(*handles)[i].is_valid()) { | 412 if (!(*handles)[i].is_valid()) { |
406 DLOG(ERROR) << "Refusing to duplicate invalid handle."; | 413 DLOG(ERROR) << "Refusing to duplicate invalid handle."; |
407 continue; | 414 continue; |
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674 | 681 |
675 bool Channel::OnControlMessage(Message::MessageType message_type, | 682 bool Channel::OnControlMessage(Message::MessageType message_type, |
676 const void* payload, | 683 const void* payload, |
677 size_t payload_size, | 684 size_t payload_size, |
678 ScopedPlatformHandleVectorPtr handles) { | 685 ScopedPlatformHandleVectorPtr handles) { |
679 return false; | 686 return false; |
680 } | 687 } |
681 | 688 |
682 } // namespace edk | 689 } // namespace edk |
683 } // namespace mojo | 690 } // namespace mojo |
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