| 1 | // Copyright (C) Microsoft Corporation. All rights reserved. |
| 2 | |
| 3 | #include "precomp.h" |
| 4 | #include "lxinitshared.h" |
| 5 | #include "GnsChannel.h" |
| 6 | |
| 7 | using namespace wsl::shared; |
| 8 | using wsl::core::GnsChannel; |
| 9 | |
| 10 | GnsChannel::GnsChannel(wil::unique_socket&& socket) : m_channel(std::move(socket), "GNS", {m_stopEvent.get()}) |
| 11 | { |
| 12 | WSL_LOG("GnsChannel::GnsChannel", TraceLoggingValue(m_channel.Socket(), "socket")); |
| 13 | } |
| 14 | |
| 15 | void GnsChannel::SendEndpointState(const hns::HNSEndpoint& Notification) |
| 16 | { |
| 17 | // if we have signaled to stop, block anyone making new calls |
| 18 | if (m_stopEvent.is_signaled()) |
| 19 | { |
| 20 | return; |
| 21 | } |
| 22 | |
| 23 | Message<LX_GNS_INTERFACE_CONFIGURATION>(LxGnsMessageInterfaceConfiguration, ToJson(Notification)); |
| 24 | } |
| 25 | |
| 26 | template <typename TMessage> |
| 27 | int GnsChannel::MessageReturnResult(LX_MESSAGE_TYPE Type, const std::string& Content, const std::function<void(TMessage&)>& BuildMessage) |
| 28 | { |
| 29 | size_t messageSize; |
| 30 | THROW_IF_FAILED(SizeTAdd(offsetof(TMessage, Content), Content.size() + 1, &messageSize)); |
| 31 | |
| 32 | // Populate the message that will be sent to gns. |
| 33 | std::vector<gsl::byte> buffer(messageSize); |
| 34 | const auto messageSpan = gsl::make_span(buffer); |
| 35 | auto* message = gslhelpers::get_struct<TMessage>(messageSpan); |
| 36 | message->Header.MessageType = Type; |
| 37 | message->Header.MessageSize = gsl::narrow_cast<ULONG>(messageSize); |
| 38 | if (BuildMessage) |
| 39 | { |
| 40 | BuildMessage(*message); |
| 41 | } |
| 42 | |
| 43 | auto offset = offsetof(TMessage, Content); |
| 44 | wsl::shared::string::CopyToSpan(Content, messageSpan, offset); |
| 45 | WI_ASSERT(messageSize == offset); |
| 46 | |
| 47 | return m_channel.Transaction<TMessage>(messageSpan).Result; |
| 48 | } |
| 49 | |
| 50 | template <typename TMessage> |
| 51 | void GnsChannel::Message(LX_MESSAGE_TYPE Type, const std::string& Content, const std::function<void(TMessage&)>& BuildMessage) |
| 52 | { |
| 53 | const auto result = MessageReturnResult(Type, Content, BuildMessage); |
| 54 | |
| 55 | THROW_HR_IF_MSG( |
| 56 | E_UNEXPECTED, |
| 57 | result == ERROR_FATAL_APP_EXIT, |
| 58 | "Did not receive a LX_GNS_RESULT after sending message %hs, type %u", |
| 59 | Content.c_str(), |
| 60 | static_cast<uint32_t>(Type)); |
| 61 | |
| 62 | THROW_HR_IF_MSG( |
| 63 | E_UNEXPECTED, |
| 64 | (result != 0), |
| 65 | "Error returned from GNS after sending message %hs, type %u. Result=%i", |
| 66 | Content.c_str(), |
| 67 | static_cast<uint32_t>(Type), |
| 68 | result); |
| 69 | } |
| 70 | |
| 71 | // the payload is expected to be of type ModifyGuestEndpointSettingRequest |
| 72 | void GnsChannel::SendHnsNotification(_In_ LPCWSTR Notification, const GUID& AdapterId) |
| 73 | { |
| 74 | // if we have signaled to stop, block anyone making new calls |
| 75 | if (m_stopEvent.is_signaled()) |
| 76 | { |
| 77 | return; |
| 78 | } |
| 79 | |
| 80 | auto AddAdapterId = [&](LX_GNS_NOTIFICATION& Message) { Message.AdapterId = AdapterId; }; |
| 81 | Message<LX_GNS_NOTIFICATION>(LxGnsMessageNotification, wsl::shared::string::WideToMultiByte(Notification), AddAdapterId); |
| 82 | } |
| 83 | |
| 84 | // Network device messages built from the corresponding serialization functions |
| 85 | // throws on error |
| 86 | void GnsChannel::SendNetworkDeviceMessage(LX_MESSAGE_TYPE MessageType, LPCWSTR MessageContent) |
| 87 | { |
| 88 | // if we have signaled to stop, block anyone making new calls |
| 89 | if (m_stopEvent.is_signaled()) |
| 90 | { |
| 91 | return; |
| 92 | } |
| 93 | |
| 94 | WI_ASSERT( |
| 95 | MessageType == LxGnsMessageVmNicCreatedNotification || MessageType == LxGnsMessageCreateDeviceRequest || |
| 96 | MessageType == LxGnsMessageModifyGuestDeviceSettingRequest || MessageType == LxGnsMessageLoopbackRoutesRequest || |
| 97 | MessageType == LxGnsMessageDeviceSettingRequest || MessageType == LxGnsMessageInitialIpConfigurationNotification || |
| 98 | MessageType == LxGnsMessageSetupIpv6 || MessageType == LxGnsMessageInterfaceConfiguration || |
| 99 | MessageType == LxGnsMessageNoOp || MessageType == LxGnsMessageGlobalNetFilter || |
| 100 | MessageType == LxGnsMessageInterfaceNetFilter || MessageType == LxGnsMessageConnectTestRequest); |
| 101 | |
| 102 | Message<LX_GNS_JSON_MESSAGE>(MessageType, wsl::shared::string::WideToMultiByte(MessageContent)); |
| 103 | } |
| 104 | |
| 105 | // Network device messages built from the corresponding serialization functions |
| 106 | // throws on error, returns the integer value that was returned from Linux |
| 107 | int GnsChannel::SendNetworkDeviceMessageReturnResult(LX_MESSAGE_TYPE MessageType, LPCWSTR MessageContent) |
| 108 | { |
| 109 | // if we have signaled to stop, block anyone making new calls |
| 110 | if (m_stopEvent.is_signaled()) |
| 111 | { |
| 112 | return ERROR_SHUTDOWN_IN_PROGRESS; |
| 113 | } |
| 114 | |
| 115 | WI_ASSERT( |
| 116 | MessageType == LxGnsMessageVmNicCreatedNotification || MessageType == LxGnsMessageCreateDeviceRequest || |
| 117 | MessageType == LxGnsMessageModifyGuestDeviceSettingRequest || MessageType == LxGnsMessageLoopbackRoutesRequest || |
| 118 | MessageType == LxGnsMessageDeviceSettingRequest || MessageType == LxGnsMessageInitialIpConfigurationNotification || |
| 119 | MessageType == LxGnsMessageSetupIpv6 || MessageType == LxGnsMessageInterfaceConfiguration || |
| 120 | MessageType == LxGnsMessageNoOp || MessageType == LxGnsMessageGlobalNetFilter || |
| 121 | MessageType == LxGnsMessageInterfaceNetFilter || MessageType == LxGnsMessageConnectTestRequest); |
| 122 | |
| 123 | return MessageReturnResult<LX_GNS_JSON_MESSAGE>(MessageType, wsl::shared::string::WideToMultiByte(MessageContent)); |
| 124 | } |
| 125 | |
| 126 | void GnsChannel::Stop() const |
| 127 | { |
| 128 | WSL_LOG("GnsChannel::Stop"); |
| 129 | m_stopEvent.SetEvent(); |
| 130 | } |