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qmk_firmware/lib/usbhost/USB_Host_Shield_2.0/SPP.cpp
Jeff Epler 9632360caa
Use a macro to compute the size of arrays at compile time (#18044) 
* Add ARRAY_SIZE and CEILING utility macros

* Apply a coccinelle patch to use ARRAY_SIZE

* fix up some straggling items

* Fix 'make test:secure'

* Enhance ARRAY_SIZE macro to reject acting on pointers

The previous definition would not produce a diagnostic for
```
int *p;
size_t num_elem = ARRAY_SIZE(p)
```
but the new one will.

* explicitly get definition of ARRAY_SIZE

* Convert to ARRAY_SIZE when const is involved

The following spatch finds additional instances where the array is
const and the division is by the size of the type, not the size of
the first element:
```
@ rule5a using "empty.iso" @
type T;
const T[] E;
@@

- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)

@ rule6a using "empty.iso" @
type T;
const T[] E;
@@

- sizeof(E)/sizeof(T)
+ ARRAY_SIZE(E)
```

* New instances of ARRAY_SIZE added since initial spatch run

* Use `ARRAY_SIZE` in docs (found by grep)

* Manually use ARRAY_SIZE

hs_set is expected to be the same size as uint16_t, though it's made
of two 8-bit integers

* Just like char, sizeof(uint8_t) is guaranteed to be 1

This is at least true on any plausible system where qmk is actually used.

Per my understanding it's universally true, assuming that uint8_t exists:
https://stackoverflow.com/questions/48655310/can-i-assume-that-sizeofuint8-t-1

* Run qmk-format on core C files touched in this branch

Co-authored-by: Stefan Kerkmann <karlk90@pm.me>
2022-08-30 10:20:04 +02:00

829 lines
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/* Copyright (C) 2012 Kristian Lauszus, TKJ Electronics. All rights reserved.
This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").
Contact information
-------------------
Kristian Lauszus, TKJ Electronics
Web : http://www.tkjelectronics.com
e-mail : kristianl@tkjelectronics.com
*/
#include "SPP.h"
// To enable serial debugging see "settings.h"
//#define EXTRADEBUG // Uncomment to get even more debugging data
//#define PRINTREPORT // Uncomment to print the report sent to the Arduino
/*
* CRC (reversed crc) lookup table as calculated by the table generator in ETSI TS 101 369 V6.3.0.
*/
const uint8_t rfcomm_crc_table[256] PROGMEM = {/* reversed, 8-bit, poly=0x07 */
0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75, 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69, 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D, 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51, 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05, 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19, 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D, 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21, 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95, 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89, 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD, 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1, 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5, 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9, 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD, 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
};
SPP::SPP(BTD *p, const char* name, const char* pin) :
BluetoothService(p) // Pointer to BTD class instance - mandatory
{
pBtd->btdName = name;
pBtd->btdPin = pin;
/* Set device cid for the SDP and RFCOMM channelse */
sdp_dcid[0] = 0x50; // 0x0050
sdp_dcid[1] = 0x00;
rfcomm_dcid[0] = 0x51; // 0x0051
rfcomm_dcid[1] = 0x00;
Reset();
}
void SPP::Reset() {
connected = false;
RFCOMMConnected = false;
SDPConnected = false;
waitForLastCommand = false;
l2cap_sdp_state = L2CAP_SDP_WAIT;
l2cap_rfcomm_state = L2CAP_RFCOMM_WAIT;
l2cap_event_flag = 0;
sppIndex = 0;
creditSent = false;
}
void SPP::disconnect() {
connected = false;
// First the two L2CAP channels has to be disconnected and then the HCI connection
if(RFCOMMConnected)
pBtd->l2cap_disconnection_request(hci_handle, ++identifier, rfcomm_scid, rfcomm_dcid);
if(RFCOMMConnected && SDPConnected)
delay(1); // Add delay between commands
if(SDPConnected)
pBtd->l2cap_disconnection_request(hci_handle, ++identifier, sdp_scid, sdp_dcid);
l2cap_sdp_state = L2CAP_DISCONNECT_RESPONSE;
}
void SPP::ACLData(uint8_t* l2capinbuf) {
if(!connected) {
if(l2capinbuf[8] == L2CAP_CMD_CONNECTION_REQUEST) {
if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == SDP_PSM && !pBtd->sdpConnectionClaimed) {
pBtd->sdpConnectionClaimed = true;
hci_handle = pBtd->hci_handle; // Store the HCI Handle for the connection
l2cap_sdp_state = L2CAP_SDP_WAIT; // Reset state
} else if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == RFCOMM_PSM && !pBtd->rfcommConnectionClaimed) {
pBtd->rfcommConnectionClaimed = true;
hci_handle = pBtd->hci_handle; // Store the HCI Handle for the connection
l2cap_rfcomm_state = L2CAP_RFCOMM_WAIT; // Reset state
}
}
}
if(checkHciHandle(l2capinbuf, hci_handle)) { // acl_handle_ok
if((l2capinbuf[6] | (l2capinbuf[7] << 8)) == 0x0001U) { // l2cap_control - Channel ID for ACL-U
if(l2capinbuf[8] == L2CAP_CMD_COMMAND_REJECT) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nL2CAP Command Rejected - Reason: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[13], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[12], 0x80);
Notify(PSTR(" Data: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[17], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[16], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[15], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[14], 0x80);
#endif
} else if(l2capinbuf[8] == L2CAP_CMD_CONNECTION_REQUEST) {
#ifdef EXTRADEBUG
Notify(PSTR("\r\nL2CAP Connection Request - PSM: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[13], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[12], 0x80);
Notify(PSTR(" SCID: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[15], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[14], 0x80);
Notify(PSTR(" Identifier: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[9], 0x80);
#endif
if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == SDP_PSM) { // It doesn't matter if it receives another reqeust, since it waits for the channel to disconnect in the L2CAP_SDP_DONE state, and the l2cap_event_flag will be cleared if so
identifier = l2capinbuf[9];
sdp_scid[0] = l2capinbuf[14];
sdp_scid[1] = l2capinbuf[15];
l2cap_set_flag(L2CAP_FLAG_CONNECTION_SDP_REQUEST);
} else if((l2capinbuf[12] | (l2capinbuf[13] << 8)) == RFCOMM_PSM) { // ----- || -----
identifier = l2capinbuf[9];
rfcomm_scid[0] = l2capinbuf[14];
rfcomm_scid[1] = l2capinbuf[15];
l2cap_set_flag(L2CAP_FLAG_CONNECTION_RFCOMM_REQUEST);
}
} else if(l2capinbuf[8] == L2CAP_CMD_CONFIG_RESPONSE) {
if((l2capinbuf[16] | (l2capinbuf[17] << 8)) == 0x0000) { // Success
if(l2capinbuf[12] == sdp_dcid[0] && l2capinbuf[13] == sdp_dcid[1]) {
//Notify(PSTR("\r\nSDP Configuration Complete"), 0x80);
l2cap_set_flag(L2CAP_FLAG_CONFIG_SDP_SUCCESS);
} else if(l2capinbuf[12] == rfcomm_dcid[0] && l2capinbuf[13] == rfcomm_dcid[1]) {
//Notify(PSTR("\r\nRFCOMM Configuration Complete"), 0x80);
l2cap_set_flag(L2CAP_FLAG_CONFIG_RFCOMM_SUCCESS);
}
}
} else if(l2capinbuf[8] == L2CAP_CMD_CONFIG_REQUEST) {
if(l2capinbuf[12] == sdp_dcid[0] && l2capinbuf[13] == sdp_dcid[1]) {
//Notify(PSTR("\r\nSDP Configuration Request"), 0x80);
pBtd->l2cap_config_response(hci_handle, l2capinbuf[9], sdp_scid);
} else if(l2capinbuf[12] == rfcomm_dcid[0] && l2capinbuf[13] == rfcomm_dcid[1]) {
//Notify(PSTR("\r\nRFCOMM Configuration Request"), 0x80);
pBtd->l2cap_config_response(hci_handle, l2capinbuf[9], rfcomm_scid);
}
} else if(l2capinbuf[8] == L2CAP_CMD_DISCONNECT_REQUEST) {
if(l2capinbuf[12] == sdp_dcid[0] && l2capinbuf[13] == sdp_dcid[1]) {
//Notify(PSTR("\r\nDisconnect Request: SDP Channel"), 0x80);
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_SDP_REQUEST);
} else if(l2capinbuf[12] == rfcomm_dcid[0] && l2capinbuf[13] == rfcomm_dcid[1]) {
//Notify(PSTR("\r\nDisconnect Request: RFCOMM Channel"), 0x80);
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_RFCOMM_REQUEST);
}
} else if(l2capinbuf[8] == L2CAP_CMD_DISCONNECT_RESPONSE) {
if(l2capinbuf[12] == sdp_scid[0] && l2capinbuf[13] == sdp_scid[1]) {
//Notify(PSTR("\r\nDisconnect Response: SDP Channel"), 0x80);
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_RESPONSE);
} else if(l2capinbuf[12] == rfcomm_scid[0] && l2capinbuf[13] == rfcomm_scid[1]) {
//Notify(PSTR("\r\nDisconnect Response: RFCOMM Channel"), 0x80);
identifier = l2capinbuf[9];
l2cap_set_flag(L2CAP_FLAG_DISCONNECT_RESPONSE);
}
} else if(l2capinbuf[8] == L2CAP_CMD_INFORMATION_REQUEST) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nInformation request"), 0x80);
#endif
identifier = l2capinbuf[9];
pBtd->l2cap_information_response(hci_handle, identifier, l2capinbuf[12], l2capinbuf[13]);
}
#ifdef EXTRADEBUG
else {
Notify(PSTR("\r\nL2CAP Unknown Signaling Command: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[8], 0x80);
}
#endif
} else if(l2capinbuf[6] == sdp_dcid[0] && l2capinbuf[7] == sdp_dcid[1]) { // SDP
if(l2capinbuf[8] == SDP_SERVICE_SEARCH_ATTRIBUTE_REQUEST_PDU) {
if(((l2capinbuf[16] << 8 | l2capinbuf[17]) == SERIALPORT_UUID) || ((l2capinbuf[16] << 8 | l2capinbuf[17]) == 0x0000 && (l2capinbuf[18] << 8 | l2capinbuf[19]) == SERIALPORT_UUID)) { // Check if it's sending the full UUID, see: https://www.bluetooth.org/Technical/AssignedNumbers/service_discovery.htm, we will just check the first four bytes
if(firstMessage) {
serialPortResponse1(l2capinbuf[9], l2capinbuf[10]);
firstMessage = false;
} else {
serialPortResponse2(l2capinbuf[9], l2capinbuf[10]); // Serialport continuation state
firstMessage = true;
}
} else if(((l2capinbuf[16] << 8 | l2capinbuf[17]) == L2CAP_UUID) || ((l2capinbuf[16] << 8 | l2capinbuf[17]) == 0x0000 && (l2capinbuf[18] << 8 | l2capinbuf[19]) == L2CAP_UUID)) {
if(firstMessage) {
l2capResponse1(l2capinbuf[9], l2capinbuf[10]);
firstMessage = false;
} else {
l2capResponse2(l2capinbuf[9], l2capinbuf[10]); // L2CAP continuation state
firstMessage = true;
}
} else
serviceNotSupported(l2capinbuf[9], l2capinbuf[10]); // The service is not supported
#ifdef EXTRADEBUG
Notify(PSTR("\r\nUUID: "), 0x80);
uint16_t uuid;
if((l2capinbuf[16] << 8 | l2capinbuf[17]) == 0x0000) // Check if it's sending the UUID as a 128-bit UUID
uuid = (l2capinbuf[18] << 8 | l2capinbuf[19]);
else // Short UUID
uuid = (l2capinbuf[16] << 8 | l2capinbuf[17]);
D_PrintHex<uint16_t > (uuid, 0x80);
Notify(PSTR("\r\nLength: "), 0x80);
uint16_t length = l2capinbuf[11] << 8 | l2capinbuf[12];
D_PrintHex<uint16_t > (length, 0x80);
Notify(PSTR("\r\nData: "), 0x80);
for(uint8_t i = 0; i < length; i++) {
D_PrintHex<uint8_t > (l2capinbuf[13 + i], 0x80);
Notify(PSTR(" "), 0x80);
}
#endif
}
#ifdef EXTRADEBUG
else {
Notify(PSTR("\r\nUnknown PDU: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[8], 0x80);
}
#endif
} else if(l2capinbuf[6] == rfcomm_dcid[0] && l2capinbuf[7] == rfcomm_dcid[1]) { // RFCOMM
rfcommChannel = l2capinbuf[8] & 0xF8;
rfcommDirection = l2capinbuf[8] & 0x04;
rfcommCommandResponse = l2capinbuf[8] & 0x02;
rfcommChannelType = l2capinbuf[9] & 0xEF;
rfcommPfBit = l2capinbuf[9] & 0x10;
if(rfcommChannel >> 3 != 0x00)
rfcommChannelConnection = rfcommChannel;
#ifdef EXTRADEBUG
Notify(PSTR("\r\nRFCOMM Channel: "), 0x80);
D_PrintHex<uint8_t > (rfcommChannel >> 3, 0x80);
Notify(PSTR(" Direction: "), 0x80);
D_PrintHex<uint8_t > (rfcommDirection >> 2, 0x80);
Notify(PSTR(" CommandResponse: "), 0x80);
D_PrintHex<uint8_t > (rfcommCommandResponse >> 1, 0x80);
Notify(PSTR(" ChannelType: "), 0x80);
D_PrintHex<uint8_t > (rfcommChannelType, 0x80);
Notify(PSTR(" PF_BIT: "), 0x80);
D_PrintHex<uint8_t > (rfcommPfBit, 0x80);
#endif
if(rfcommChannelType == RFCOMM_DISC) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nReceived Disconnect RFCOMM Command on channel: "), 0x80);
D_PrintHex<uint8_t > (rfcommChannel >> 3, 0x80);
#endif
connected = false;
sendRfcomm(rfcommChannel, rfcommDirection, rfcommCommandResponse, RFCOMM_UA, rfcommPfBit, rfcommbuf, 0x00); // UA Command
}
if(connected) {
/* Read the incoming message */
if(rfcommChannelType == RFCOMM_UIH && rfcommChannel == rfcommChannelConnection) {
uint8_t length = l2capinbuf[10] >> 1; // Get length
uint8_t offset = l2capinbuf[4] - length - 4; // Check if there is credit
if(checkFcs(&l2capinbuf[8], l2capinbuf[11 + length + offset])) {
uint8_t i = 0;
for(; i < length; i++) {
if(rfcommAvailable + i >= sizeof (rfcommDataBuffer)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nWarning: Buffer is full!"), 0x80);
#endif
break;
}
rfcommDataBuffer[rfcommAvailable + i] = l2capinbuf[11 + i + offset];
}
rfcommAvailable += i;
#ifdef EXTRADEBUG
Notify(PSTR("\r\nRFCOMM Data Available: "), 0x80);
Notify(rfcommAvailable, 0x80);
if(offset) {
Notify(PSTR(" - Credit: 0x"), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[11], 0x80);
}
#endif
}
#ifdef DEBUG_USB_HOST
else
Notify(PSTR("\r\nError in FCS checksum!"), 0x80);
#endif
#ifdef PRINTREPORT // Uncomment "#define PRINTREPORT" to print the report send to the Arduino via Bluetooth
for(uint8_t i = 0; i < length; i++)
Notifyc(l2capinbuf[i + 11 + offset], 0x80);
#endif
} else if(rfcommChannelType == RFCOMM_UIH && l2capinbuf[11] == BT_RFCOMM_RPN_CMD) { // UIH Remote Port Negotiation Command
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nReceived UIH Remote Port Negotiation Command"), 0x80);
#endif
rfcommbuf[0] = BT_RFCOMM_RPN_RSP; // Command
rfcommbuf[1] = l2capinbuf[12]; // Length and shiftet like so: length << 1 | 1
rfcommbuf[2] = l2capinbuf[13]; // Channel: channel << 1 | 1
rfcommbuf[3] = l2capinbuf[14]; // Pre difined for Bluetooth, see 5.5.3 of TS 07.10 Adaption for RFCOMM
rfcommbuf[4] = l2capinbuf[15]; // Priority
rfcommbuf[5] = l2capinbuf[16]; // Timer
rfcommbuf[6] = l2capinbuf[17]; // Max Fram Size LSB
rfcommbuf[7] = l2capinbuf[18]; // Max Fram Size MSB
rfcommbuf[8] = l2capinbuf[19]; // MaxRatransm.
rfcommbuf[9] = l2capinbuf[20]; // Number of Frames
sendRfcomm(rfcommChannel, rfcommDirection, 0, RFCOMM_UIH, rfcommPfBit, rfcommbuf, 0x0A); // UIH Remote Port Negotiation Response
} else if(rfcommChannelType == RFCOMM_UIH && l2capinbuf[11] == BT_RFCOMM_MSC_CMD) { // UIH Modem Status Command
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend UIH Modem Status Response"), 0x80);
#endif
rfcommbuf[0] = BT_RFCOMM_MSC_RSP; // UIH Modem Status Response
rfcommbuf[1] = 2 << 1 | 1; // Length and shiftet like so: length << 1 | 1
rfcommbuf[2] = l2capinbuf[13]; // Channel: (1 << 0) | (1 << 1) | (0 << 2) | (channel << 3)
rfcommbuf[3] = l2capinbuf[14];
sendRfcomm(rfcommChannel, rfcommDirection, 0, RFCOMM_UIH, rfcommPfBit, rfcommbuf, 0x04);
}
} else {
if(rfcommChannelType == RFCOMM_SABM) { // SABM Command - this is sent twice: once for channel 0 and then for the channel to establish
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nReceived SABM Command"), 0x80);
#endif
sendRfcomm(rfcommChannel, rfcommDirection, rfcommCommandResponse, RFCOMM_UA, rfcommPfBit, rfcommbuf, 0x00); // UA Command
} else if(rfcommChannelType == RFCOMM_UIH && l2capinbuf[11] == BT_RFCOMM_PN_CMD) { // UIH Parameter Negotiation Command
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nReceived UIH Parameter Negotiation Command"), 0x80);
#endif
rfcommbuf[0] = BT_RFCOMM_PN_RSP; // UIH Parameter Negotiation Response
rfcommbuf[1] = l2capinbuf[12]; // Length and shiftet like so: length << 1 | 1
rfcommbuf[2] = l2capinbuf[13]; // Channel: channel << 1 | 1
rfcommbuf[3] = 0xE0; // Pre difined for Bluetooth, see 5.5.3 of TS 07.10 Adaption for RFCOMM
rfcommbuf[4] = 0x00; // Priority
rfcommbuf[5] = 0x00; // Timer
rfcommbuf[6] = BULK_MAXPKTSIZE - 14; // Max Fram Size LSB - set to the size of received data (50)
rfcommbuf[7] = 0x00; // Max Fram Size MSB
rfcommbuf[8] = 0x00; // MaxRatransm.
rfcommbuf[9] = 0x00; // Number of Frames
sendRfcomm(rfcommChannel, rfcommDirection, 0, RFCOMM_UIH, rfcommPfBit, rfcommbuf, 0x0A);
} else if(rfcommChannelType == RFCOMM_UIH && l2capinbuf[11] == BT_RFCOMM_MSC_CMD) { // UIH Modem Status Command
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend UIH Modem Status Response"), 0x80);
#endif
rfcommbuf[0] = BT_RFCOMM_MSC_RSP; // UIH Modem Status Response
rfcommbuf[1] = 2 << 1 | 1; // Length and shiftet like so: length << 1 | 1
rfcommbuf[2] = l2capinbuf[13]; // Channel: (1 << 0) | (1 << 1) | (0 << 2) | (channel << 3)
rfcommbuf[3] = l2capinbuf[14];
sendRfcomm(rfcommChannel, rfcommDirection, 0, RFCOMM_UIH, rfcommPfBit, rfcommbuf, 0x04);
delay(1);
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend UIH Modem Status Command"), 0x80);
#endif
rfcommbuf[0] = BT_RFCOMM_MSC_CMD; // UIH Modem Status Command
rfcommbuf[1] = 2 << 1 | 1; // Length and shiftet like so: length << 1 | 1
rfcommbuf[2] = l2capinbuf[13]; // Channel: (1 << 0) | (1 << 1) | (0 << 2) | (channel << 3)
rfcommbuf[3] = 0x8D; // Can receive frames (YES), Ready to Communicate (YES), Ready to Receive (YES), Incomig Call (NO), Data is Value (YES)
sendRfcomm(rfcommChannel, rfcommDirection, 0, RFCOMM_UIH, rfcommPfBit, rfcommbuf, 0x04);
} else if(rfcommChannelType == RFCOMM_UIH && l2capinbuf[11] == BT_RFCOMM_MSC_RSP) { // UIH Modem Status Response
if(!creditSent) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSend UIH Command with credit"), 0x80);
#endif
sendRfcommCredit(rfcommChannelConnection, rfcommDirection, 0, RFCOMM_UIH, 0x10, sizeof (rfcommDataBuffer)); // Send credit
creditSent = true;
timer = millis();
waitForLastCommand = true;
}
} else if(rfcommChannelType == RFCOMM_UIH && l2capinbuf[10] == 0x01) { // UIH Command with credit
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nReceived UIH Command with credit"), 0x80);
#endif
} else if(rfcommChannelType == RFCOMM_UIH && l2capinbuf[11] == BT_RFCOMM_RPN_CMD) { // UIH Remote Port Negotiation Command
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nReceived UIH Remote Port Negotiation Command"), 0x80);
#endif
rfcommbuf[0] = BT_RFCOMM_RPN_RSP; // Command
rfcommbuf[1] = l2capinbuf[12]; // Length and shiftet like so: length << 1 | 1
rfcommbuf[2] = l2capinbuf[13]; // Channel: channel << 1 | 1
rfcommbuf[3] = l2capinbuf[14]; // Pre difined for Bluetooth, see 5.5.3 of TS 07.10 Adaption for RFCOMM
rfcommbuf[4] = l2capinbuf[15]; // Priority
rfcommbuf[5] = l2capinbuf[16]; // Timer
rfcommbuf[6] = l2capinbuf[17]; // Max Fram Size LSB
rfcommbuf[7] = l2capinbuf[18]; // Max Fram Size MSB
rfcommbuf[8] = l2capinbuf[19]; // MaxRatransm.
rfcommbuf[9] = l2capinbuf[20]; // Number of Frames
sendRfcomm(rfcommChannel, rfcommDirection, 0, RFCOMM_UIH, rfcommPfBit, rfcommbuf, 0x0A); // UIH Remote Port Negotiation Response
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nRFCOMM Connection is now established\r\n"), 0x80);
#endif
onInit();
}
#ifdef EXTRADEBUG
else if(rfcommChannelType != RFCOMM_DISC) {
Notify(PSTR("\r\nUnsupported RFCOMM Data - ChannelType: "), 0x80);
D_PrintHex<uint8_t > (rfcommChannelType, 0x80);
Notify(PSTR(" Command: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[11], 0x80);
}
#endif
}
}
#ifdef EXTRADEBUG
else {
Notify(PSTR("\r\nUnsupported L2CAP Data - Channel ID: "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[7], 0x80);
Notify(PSTR(" "), 0x80);
D_PrintHex<uint8_t > (l2capinbuf[6], 0x80);
}
#endif
SDP_task();
RFCOMM_task();
}
}
void SPP::Run() {
if(waitForLastCommand && (millis() - timer) > 100) { // We will only wait 100ms and see if the UIH Remote Port Negotiation Command is send, as some deviced don't send it
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nRFCOMM Connection is now established - Automatic\r\n"), 0x80);
#endif
onInit();
}
send(); // Send all bytes currently in the buffer
}
void SPP::onInit() {
creditSent = false;
waitForLastCommand = false;
connected = true; // The RFCOMM channel is now established
sppIndex = 0;
if(pFuncOnInit)
pFuncOnInit(); // Call the user function
};
void SPP::SDP_task() {
switch(l2cap_sdp_state) {
case L2CAP_SDP_WAIT:
if(l2cap_check_flag(L2CAP_FLAG_CONNECTION_SDP_REQUEST)) {
l2cap_clear_flag(L2CAP_FLAG_CONNECTION_SDP_REQUEST); // Clear flag
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSDP Incoming Connection Request"), 0x80);
#endif
pBtd->l2cap_connection_response(hci_handle, identifier, sdp_dcid, sdp_scid, PENDING);
delay(1);
pBtd->l2cap_connection_response(hci_handle, identifier, sdp_dcid, sdp_scid, SUCCESSFUL);
identifier++;
delay(1);
pBtd->l2cap_config_request(hci_handle, identifier, sdp_scid);
l2cap_sdp_state = L2CAP_SDP_SUCCESS;
} else if(l2cap_check_flag(L2CAP_FLAG_DISCONNECT_SDP_REQUEST)) {
l2cap_clear_flag(L2CAP_FLAG_DISCONNECT_SDP_REQUEST); // Clear flag
SDPConnected = false;
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnected SDP Channel"), 0x80);
#endif
pBtd->l2cap_disconnection_response(hci_handle, identifier, sdp_dcid, sdp_scid);
}
break;
case L2CAP_SDP_SUCCESS:
if(l2cap_check_flag(L2CAP_FLAG_CONFIG_SDP_SUCCESS)) {
l2cap_clear_flag(L2CAP_FLAG_CONFIG_SDP_SUCCESS); // Clear flag
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nSDP Successfully Configured"), 0x80);
#endif
firstMessage = true; // Reset bool
SDPConnected = true;
l2cap_sdp_state = L2CAP_SDP_WAIT;
}
break;
case L2CAP_DISCONNECT_RESPONSE: // This is for both disconnection response from the RFCOMM and SDP channel if they were connected
if(l2cap_check_flag(L2CAP_FLAG_DISCONNECT_RESPONSE)) {
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnected L2CAP Connection"), 0x80);
#endif
pBtd->hci_disconnect(hci_handle);
hci_handle = -1; // Reset handle
Reset();
}
break;
}
}
void SPP::RFCOMM_task() {
switch(l2cap_rfcomm_state) {
case L2CAP_RFCOMM_WAIT:
if(l2cap_check_flag(L2CAP_FLAG_CONNECTION_RFCOMM_REQUEST)) {
l2cap_clear_flag(L2CAP_FLAG_CONNECTION_RFCOMM_REQUEST); // Clear flag
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nRFCOMM Incoming Connection Request"), 0x80);
#endif
pBtd->l2cap_connection_response(hci_handle, identifier, rfcomm_dcid, rfcomm_scid, PENDING);
delay(1);
pBtd->l2cap_connection_response(hci_handle, identifier, rfcomm_dcid, rfcomm_scid, SUCCESSFUL);
identifier++;
delay(1);
pBtd->l2cap_config_request(hci_handle, identifier, rfcomm_scid);
l2cap_rfcomm_state = L2CAP_RFCOMM_SUCCESS;
} else if(l2cap_check_flag(L2CAP_FLAG_DISCONNECT_RFCOMM_REQUEST)) {
l2cap_clear_flag(L2CAP_FLAG_DISCONNECT_RFCOMM_REQUEST); // Clear flag
RFCOMMConnected = false;
connected = false;
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nDisconnected RFCOMM Channel"), 0x80);
#endif
pBtd->l2cap_disconnection_response(hci_handle, identifier, rfcomm_dcid, rfcomm_scid);
}
break;
case L2CAP_RFCOMM_SUCCESS:
if(l2cap_check_flag(L2CAP_FLAG_CONFIG_RFCOMM_SUCCESS)) {
l2cap_clear_flag(L2CAP_FLAG_CONFIG_RFCOMM_SUCCESS); // Clear flag
#ifdef DEBUG_USB_HOST
Notify(PSTR("\r\nRFCOMM Successfully Configured"), 0x80);
#endif
rfcommAvailable = 0; // Reset number of bytes available
bytesRead = 0; // Reset number of bytes received
RFCOMMConnected = true;
l2cap_rfcomm_state = L2CAP_RFCOMM_WAIT;
}
break;
}
}
/************************************************************/
/* SDP Commands */
/************************************************************/
void SPP::SDP_Command(uint8_t* data, uint8_t nbytes) { // See page 223 in the Bluetooth specs
pBtd->L2CAP_Command(hci_handle, data, nbytes, sdp_scid[0], sdp_scid[1]);
}
void SPP::serviceNotSupported(uint8_t transactionIDHigh, uint8_t transactionIDLow) { // See page 235 in the Bluetooth specs
l2capoutbuf[0] = SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE_PDU;
l2capoutbuf[1] = transactionIDHigh;
l2capoutbuf[2] = transactionIDLow;
l2capoutbuf[3] = 0x00; // MSB Parameter Length
l2capoutbuf[4] = 0x05; // LSB Parameter Length = 5
l2capoutbuf[5] = 0x00; // MSB AttributeListsByteCount
l2capoutbuf[6] = 0x02; // LSB AttributeListsByteCount = 2
/* Attribute ID/Value Sequence: */
l2capoutbuf[7] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[8] = 0x00; // Length = 0
l2capoutbuf[9] = 0x00; // No continuation state
SDP_Command(l2capoutbuf, 10);
}
void SPP::serialPortResponse1(uint8_t transactionIDHigh, uint8_t transactionIDLow) {
l2capoutbuf[0] = SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE_PDU;
l2capoutbuf[1] = transactionIDHigh;
l2capoutbuf[2] = transactionIDLow;
l2capoutbuf[3] = 0x00; // MSB Parameter Length
l2capoutbuf[4] = 0x2B; // LSB Parameter Length = 43
l2capoutbuf[5] = 0x00; // MSB AttributeListsByteCount
l2capoutbuf[6] = 0x26; // LSB AttributeListsByteCount = 38
/* Attribute ID/Value Sequence: */
l2capoutbuf[7] = 0x36; // Data element sequence - length in next two bytes
l2capoutbuf[8] = 0x00; // MSB Length
l2capoutbuf[9] = 0x3C; // LSB Length = 60
l2capoutbuf[10] = 0x36; // Data element sequence - length in next two bytes
l2capoutbuf[11] = 0x00; // MSB Length
l2capoutbuf[12] = 0x39; // LSB Length = 57
l2capoutbuf[13] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[14] = 0x00; // MSB ServiceRecordHandle
l2capoutbuf[15] = 0x00; // LSB ServiceRecordHandle
l2capoutbuf[16] = 0x0A; // Unsigned int - length 4 bytes
l2capoutbuf[17] = 0x00; // ServiceRecordHandle value - TODO: Is this related to HCI_Handle?
l2capoutbuf[18] = 0x01;
l2capoutbuf[19] = 0x00;
l2capoutbuf[20] = 0x06;
l2capoutbuf[21] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[22] = 0x00; // MSB ServiceClassIDList
l2capoutbuf[23] = 0x01; // LSB ServiceClassIDList
l2capoutbuf[24] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[25] = 0x03; // Length = 3
l2capoutbuf[26] = 0x19; // UUID (universally unique identifier) - length = 2 bytes
l2capoutbuf[27] = 0x11; // MSB SerialPort
l2capoutbuf[28] = 0x01; // LSB SerialPort
l2capoutbuf[29] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[30] = 0x00; // MSB ProtocolDescriptorList
l2capoutbuf[31] = 0x04; // LSB ProtocolDescriptorList
l2capoutbuf[32] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[33] = 0x0C; // Length = 12
l2capoutbuf[34] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[35] = 0x03; // Length = 3
l2capoutbuf[36] = 0x19; // UUID (universally unique identifier) - length = 2 bytes
l2capoutbuf[37] = 0x01; // MSB L2CAP
l2capoutbuf[38] = 0x00; // LSB L2CAP
l2capoutbuf[39] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[40] = 0x05; // Length = 5
l2capoutbuf[41] = 0x19; // UUID (universally unique identifier) - length = 2 bytes
l2capoutbuf[42] = 0x00; // MSB RFCOMM
l2capoutbuf[43] = 0x03; // LSB RFCOMM
l2capoutbuf[44] = 0x08; // Unsigned Integer - length 1 byte
l2capoutbuf[45] = 0x02; // ContinuationState - Two more bytes
l2capoutbuf[46] = 0x00; // MSB length
l2capoutbuf[47] = 0x19; // LSB length = 25 more bytes to come
SDP_Command(l2capoutbuf, 48);
}
void SPP::serialPortResponse2(uint8_t transactionIDHigh, uint8_t transactionIDLow) {
l2capoutbuf[0] = SDP_SERVICE_SEARCH_ATTRIBUTE_RESPONSE_PDU;
l2capoutbuf[1] = transactionIDHigh;
l2capoutbuf[2] = transactionIDLow;
l2capoutbuf[3] = 0x00; // MSB Parameter Length
l2capoutbuf[4] = 0x1C; // LSB Parameter Length = 28
l2capoutbuf[5] = 0x00; // MSB AttributeListsByteCount
l2capoutbuf[6] = 0x19; // LSB AttributeListsByteCount = 25
/* Attribute ID/Value Sequence: */
l2capoutbuf[7] = 0x01; // Channel 1 - TODO: Try different values, so multiple servers can be used at once
l2capoutbuf[8] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[9] = 0x00; // MSB LanguageBaseAttributeIDList
l2capoutbuf[10] = 0x06; // LSB LanguageBaseAttributeIDList
l2capoutbuf[11] = 0x35; // Data element sequence - length in next byte
l2capoutbuf[12] = 0x09; // Length = 9
// Identifier representing the natural language = en = English - see: "ISO 639:1988"
l2capoutbuf[13] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[14] = 0x65; // 'e'
l2capoutbuf[15] = 0x6E; // 'n'
// "The second element of each triplet contains an identifier that specifies a character encoding used for the language"
// Encoding is set to 106 (UTF-8) - see: http://www.iana.org/assignments/character-sets/character-sets.xhtml
l2capoutbuf[16] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[17] = 0x00; // MSB of character encoding
l2capoutbuf[18] = 0x6A; // LSB of character encoding (106)
// Attribute ID that serves as the base attribute ID for the natural language in the service record
// "To facilitate the retrieval of human-readable universal attributes in a principal language, the base attribute ID value for the primary language supported by a service record shall be 0x0100"
l2capoutbuf[19] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[20] = 0x01;
l2capoutbuf[21] = 0x00;
l2capoutbuf[22] = 0x09; // Unsigned Integer - length 2 bytes
l2capoutbuf[23] = 0x01; // MSB ServiceDescription
l2capoutbuf[24] = 0x00; // LSB ServiceDescription
l2capoutbuf[25] = 0x25; // Text string - length in next byte
l2capoutbuf[26] = 0x05; // Name length
l2capoutbuf[27] = 'T';
l2capoutbuf[28] = 'K';
l2capoutbuf[29] = 'J';
l2capoutbuf[30] = 'S';
l2capoutbuf[31] = 'P';
l2capoutbuf[32] = 0x00; // No continuation state
SDP_Command(l2capoutbuf, 33);
}
void SPP::l2capResponse1(uint8_t transactionIDHigh, uint8_t transactionIDLow) {
serialPortResponse1(transactionIDHigh, transactionIDLow); // These has to send all the supported functions, since it only supports virtual serialport it just sends the message again
}
void SPP::l2capResponse2(uint8_t transactionIDHigh, uint8_t transactionIDLow) {
serialPortResponse2(transactionIDHigh, transactionIDLow); // Same data as serialPortResponse2
}
/************************************************************/
/* RFCOMM Commands */
/************************************************************/
void SPP::RFCOMM_Command(uint8_t* data, uint8_t nbytes) {
pBtd->L2CAP_Command(hci_handle, data, nbytes, rfcomm_scid[0], rfcomm_scid[1]);
}
void SPP::sendRfcomm(uint8_t channel, uint8_t direction, uint8_t CR, uint8_t channelType, uint8_t pfBit, uint8_t* data, uint8_t length) {
l2capoutbuf[0] = channel | direction | CR | extendAddress; // RFCOMM Address
l2capoutbuf[1] = channelType | pfBit; // RFCOMM Control
l2capoutbuf[2] = length << 1 | 0x01; // Length and format (always 0x01 bytes format)
uint8_t i = 0;
for(; i < length; i++)
l2capoutbuf[i + 3] = data[i];
l2capoutbuf[i + 3] = calcFcs(l2capoutbuf);
#ifdef EXTRADEBUG
Notify(PSTR(" - RFCOMM Data: "), 0x80);
for(i = 0; i < length + 4; i++) {
D_PrintHex<uint8_t > (l2capoutbuf[i], 0x80);
Notify(PSTR(" "), 0x80);
}
#endif
RFCOMM_Command(l2capoutbuf, length + 4);
}
void SPP::sendRfcommCredit(uint8_t channel, uint8_t direction, uint8_t CR, uint8_t channelType, uint8_t pfBit, uint8_t credit) {
l2capoutbuf[0] = channel | direction | CR | extendAddress; // RFCOMM Address
l2capoutbuf[1] = channelType | pfBit; // RFCOMM Control
l2capoutbuf[2] = 0x01; // Length = 0
l2capoutbuf[3] = credit; // Credit
l2capoutbuf[4] = calcFcs(l2capoutbuf);
#ifdef EXTRADEBUG
Notify(PSTR(" - RFCOMM Credit Data: "), 0x80);
for(uint8_t i = 0; i < 5; i++) {
D_PrintHex<uint8_t > (l2capoutbuf[i], 0x80);
Notify(PSTR(" "), 0x80);
}
#endif
RFCOMM_Command(l2capoutbuf, 5);
}
/* CRC on 2 bytes */
uint8_t SPP::crc(uint8_t *data) {
return (pgm_read_byte(&rfcomm_crc_table[pgm_read_byte(&rfcomm_crc_table[0xFF ^ data[0]]) ^ data[1]]));
}
/* Calculate FCS */
uint8_t SPP::calcFcs(uint8_t *data) {
uint8_t temp = crc(data);
if((data[1] & 0xEF) == RFCOMM_UIH)
return (0xFF - temp); // FCS on 2 bytes
else
return (0xFF - pgm_read_byte(&rfcomm_crc_table[temp ^ data[2]])); // FCS on 3 bytes
}
/* Check FCS */
bool SPP::checkFcs(uint8_t *data, uint8_t fcs) {
uint8_t temp = crc(data);
if((data[1] & 0xEF) != RFCOMM_UIH)
temp = pgm_read_byte(&rfcomm_crc_table[temp ^ data[2]]); // FCS on 3 bytes
return (pgm_read_byte(&rfcomm_crc_table[temp ^ fcs]) == 0xCF);
}
/* Serial commands */
#if defined(ARDUINO) && ARDUINO >=100
size_t SPP::write(uint8_t data) {
return write(&data, 1);
}
#else
void SPP::write(uint8_t data) {
write(&data, 1);
}
#endif
#if defined(ARDUINO) && ARDUINO >=100
size_t SPP::write(const uint8_t *data, size_t size) {
#else
void SPP::write(const uint8_t *data, size_t size) {
#endif
for(uint8_t i = 0; i < size; i++) {
if(sppIndex >= ARRAY_SIZE(sppOutputBuffer))
send(); // Send the current data in the buffer
sppOutputBuffer[sppIndex++] = data[i]; // All the bytes are put into a buffer and then send using the send() function
}
#if defined(ARDUINO) && ARDUINO >=100
return size;
#endif
}
void SPP::send() {
if(!connected || !sppIndex)
return;
uint8_t length; // This is the length of the string we are sending
uint8_t offset = 0; // This is used to keep track of where we are in the string
l2capoutbuf[0] = rfcommChannelConnection | 0 | 0 | extendAddress; // RFCOMM Address
l2capoutbuf[1] = RFCOMM_UIH; // RFCOMM Control
while(sppIndex) { // We will run this while loop until this variable is 0
if(sppIndex > (sizeof (l2capoutbuf) - 4)) // Check if the string is larger than the outgoing buffer
length = sizeof (l2capoutbuf) - 4;
else
length = sppIndex;
l2capoutbuf[2] = length << 1 | 1; // Length
uint8_t i = 0;
for(; i < length; i++)
l2capoutbuf[i + 3] = sppOutputBuffer[i + offset];
l2capoutbuf[i + 3] = calcFcs(l2capoutbuf); // Calculate checksum
RFCOMM_Command(l2capoutbuf, length + 4);
sppIndex -= length;
offset += length; // Increment the offset
}
}
int SPP::available(void) {
return rfcommAvailable;
};
void SPP::discard(void) {
rfcommAvailable = 0;
}
int SPP::peek(void) {
if(rfcommAvailable == 0) // Don't read if there is nothing in the buffer
return -1;
return rfcommDataBuffer[0];
}
int SPP::read(void) {
if(rfcommAvailable == 0) // Don't read if there is nothing in the buffer
return -1;
uint8_t output = rfcommDataBuffer[0];
for(uint8_t i = 1; i < rfcommAvailable; i++)
rfcommDataBuffer[i - 1] = rfcommDataBuffer[i]; // Shift the buffer one left
rfcommAvailable--;
bytesRead++;
if(bytesRead > (sizeof (rfcommDataBuffer) - 5)) { // We will send the command just before it runs out of credit
bytesRead = 0;
sendRfcommCredit(rfcommChannelConnection, rfcommDirection, 0, RFCOMM_UIH, 0x10, sizeof (rfcommDataBuffer)); // Send more credit
#ifdef EXTRADEBUG
Notify(PSTR("\r\nSent "), 0x80);
Notify((uint8_t)sizeof (rfcommDataBuffer), 0x80);
Notify(PSTR(" more credit"), 0x80);
#endif
}
return output;
}
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