1 files changed, 80 insertions, 0 deletions
diff --git a/src/core/hle/service/nwm/uds_data.h b/src/core/hle/service/nwm/uds_data.h
new file mode 100644
index 000000000..0dd46bcb1
--- /dev/null
+++ b/src/core/hle/service/nwm/uds_data.h
@@ -0,0 +1,80 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "common/swap.h"
+#include "core/hle/service/service.h"
+
+namespace Service {
+namespace NWM {
+
+enum class SAP : u8 {
+    SNAPExtensionUsed = 0xAA
+};
+
+enum class PDUControl : u8 {
+    UnnumberedInformation = 3
+};
+
+enum class EtherType : u16 {
+    SecureData = 0x876D,
+    EAPoL = 0x888E
+};
+
+/*
+ * 802.2 header, UDS packets always use SNAP for these headers,
+ * which means the dsap and ssap are always SNAPExtensionUsed (0xAA)
+ * and the OUI is always 0.
+ */
+struct LLCHeader {
+    u8 dsap = static_cast<u8>(SAP::SNAPExtensionUsed);
+    u8 ssap = static_cast<u8>(SAP::SNAPExtensionUsed);
+    u8 control = static_cast<u8>(PDUControl::UnnumberedInformation);
+    std::array<u8, 3> OUI = {};
+    u16_be protocol;
+};
+
+static_assert(sizeof(LLCHeader) == 8, "LLCHeader has the wrong size");
+
+/*
+ * Nintendo SecureData header, every UDS packet contains one,
+ * it is used to store metadata about the transmission such as
+ * the source and destination network node ids.
+ */
+struct SecureDataHeader {
+    u16_be protocol_size;
+    INSERT_PADDING_BYTES(2);
+    u16_be securedata_size;
+    u8 is_management;
+    u8 data_channel;
+    u16_be sequence_number;
+    u16_be dest_node_id;
+    u16_be src_node_id;
+};
+
+static_assert(sizeof(SecureDataHeader) == 14, "SecureDataHeader has the wrong size");
+
+/*
+ * The raw bytes of this structure are the CTR used in the encryption (AES-CTR)
+ * process used to generate the CCMP key for data frame encryption.
+ */
+struct DataFrameCryptoCTR {
+    u32_le wlan_comm_id;
+    u32_le network_id;
+    std::array<u8, 6> host_mac;
+    u16_le id;
+};
+
+static_assert(sizeof(DataFrameCryptoCTR) == 16, "DataFrameCryptoCTR has the wrong size");
+
+/**
+ * Generates an encrypted 802.11 data frame starting at the CCMP IV.
+ * @returns The generated frame.
+ */
+std::vector<u8> GenerateDataFrame(const std::vector<u8>& data, u8 channel, u16 dest_node, u16 src_node, u16 sequence_number);
+
+} // namespace NWM
+} // namespace Service