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mc.mitm: add handler for nfc/ir requests

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ndeadly 2022-09-14 22:48:03 +02:00
parent 5bef87387a
commit d9487b5e9f
3 changed files with 71 additions and 1 deletions
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64
mc_mitm/source/controllers/emulated_switch_controller.cpp
View file

@ -87,6 +87,36 @@ namespace ams::controller {
return ams::ResultSuccess();
}
// CRC-8 with polynomial 0x7 for NFC/IR packets
uint8_t crc8_lut[] = {
0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
};
uint8_t ComputeCrc8(const void *data, size_t size) {
auto *bytes = reinterpret_cast<const uint8_t *>(data);
uint8_t crc = 0x00;
for (size_t i = 0; i < size; ++i) {
crc = crc8_lut[crc ^ bytes[i]];
}
return crc;
}
}
EmulatedSwitchController::EmulatedSwitchController(const bluetooth::Address *address, HardwareID id)
@ -153,6 +183,7 @@ namespace ams::controller {
break;
case 0x11:
R_TRY(this->HandleRumbleData(&output_report->rumble_data));
R_TRY(this->HandleNfcIrData(output_report->type0x11.nfc_ir_data));
break;
default:
break;
@ -560,4 +591,37 @@ namespace ams::controller {
return bluetooth::hid::report::WriteHidDataReport(m_address, &m_input_report);
}
Result EmulatedSwitchController::HandleNfcIrData(const uint8_t *nfc_ir) {
AMS_UNUSED(nfc_ir);
SwitchNfcIrResponse response = {};
// Send device not ready response for now
response.data[0] = 0xff;
return this->FakeNfcIrResponse(&response);
}
Result EmulatedSwitchController::FakeNfcIrResponse(const SwitchNfcIrResponse *response) {
std::scoped_lock lk(m_input_mutex);
auto input_report = reinterpret_cast<SwitchInputReport *>(m_input_report.data);
input_report->id = 0x31;
input_report->timer = (input_report->timer + 1) & 0xff;
input_report->conn_info = (0 << 1) | m_ext_power;
input_report->battery = m_battery | m_charging;
input_report->buttons = m_buttons;
input_report->left_stick = m_left_stick;
input_report->right_stick = m_right_stick;
input_report->vibrator = 0;
std::memcpy(&input_report->type0x31.motion_data, &m_motion_data, sizeof(m_motion_data));
std::memcpy(&input_report->type0x31.nfc_ir_response, response, sizeof(SwitchNfcIrResponse));
input_report->type0x31.crc = ComputeCrc8(response, sizeof(SwitchNfcIrResponse));
m_input_report.size = offsetof(SwitchInputReport, type0x31) + sizeof(input_report->type0x31);
// Write a fake response into the report buffer
return bluetooth::hid::report::WriteHidDataReport(m_address, &m_input_report);
}
}

2
mc_mitm/source/controllers/emulated_switch_controller.hpp
View file

@ -45,6 +45,7 @@ namespace ams::controller {
Result HandleRumbleData(const SwitchRumbleDataEncoded *encoded);
Result HandleHidCommand(const SwitchHidCommand *command);
Result HandleNfcIrData(const uint8_t *nfc_ir);
Result HandleHidCommandGetDeviceInfo(const SwitchHidCommand *command);
Result HandleHidCommandSetDataFormat(const SwitchHidCommand *command);
@ -66,6 +67,7 @@ namespace ams::controller {
Result HandleHidCommandMotorEnable(const SwitchHidCommand *command);
Result FakeHidCommandResponse(const SwitchHidCommandResponse *response);
Result FakeNfcIrResponse(const SwitchNfcIrResponse *response);
bool m_charging;
bool m_ext_power;

6
mc_mitm/source/controllers/switch_controller.hpp
View file

@ -269,6 +269,10 @@ namespace ams::controller {
} data;
} __attribute__ ((__packed__));
struct SwitchNfcIrResponse {
uint8_t data[0x138];
} __attribute__ ((__packed__));
struct SwitchInputReport {
uint8_t id;
uint8_t timer;
@ -294,7 +298,7 @@ namespace ams::controller {
struct {
Switch6AxisData motion_data[3]; // IMU samples at 0, 5 and 10ms
uint8_t nfc_ir_data[0x138];
SwitchNfcIrResponse nfc_ir_response;
uint8_t crc;
} type0x31;
};