File content as of revision 18:2579c275ef57:

/*
Copyright (c) 2010 Peter Barrett

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

/* 
Tue Apr 26 2011 Bart Janssens: added HCI connection accept
*/

#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <mbed.h>

#include "Utils.h"
#include "hci.h"
#include "hci_private.h"

enum hci_callback_evt
{
    NONE,
    CONNECT,
    DISCONECT,
    INQUIRYRESULT
};

#define MAX_BLUETOOTH_ADAPTERS 1

enum StateMask {
    MASK_RESET = 1,
    MASK_READ_BUFFER_SIZE = 2,
    MASK_READ_BD_ADDR = 4,
    MASK_INITED = 8,
    MASK_INQUIRY = 16,
    MASK_REMOTE_NAME = 32,
    MASK_CREATE_CONNECTION = 64
};

int  HCI::Open(HCITransport* transport, HCICallback callback)
{
    _transport = transport;
    _transport->Set(this);
    _callback = callback;
    _state = 0;
    for (int i = 0; i < MAX_BTDEVICES; i++)
    {
        _devices[i].Init();
        _devices[i]._transport = transport;
    }
    return SendCmd(HCI_OP_RESET);
}

void printf(const BD_ADDR* addr);
void fprintf(FILE *fp,const BD_ADDR* addr);

BTDevice* HCI::Find(const BD_ADDR* addr)
{
    for (int i = 0; i < MAX_BTDEVICES; i++)
        if (_devices[i]._state != 0 && memcmp(addr,&_devices[i]._info.bdaddr,6) == 0)
            return &_devices[i];
    return 0;
}

BTDevice* HCI::Find(int handle)
{
    for (int i = 0; i < MAX_BTDEVICES; i++)
        if (_devices[i]._state != 0 && handle == _devices[i]._handle)
            return &_devices[i];
    return 0;
}
//
bool HCI::Busy()
{
    return (_state & (MASK_INQUIRY | MASK_REMOTE_NAME | MASK_CREATE_CONNECTION)) != 0;
}

int HCI::Inquiry(int duration)
{
    _state |= MASK_INQUIRY;
    u8 buf[5];
    buf[0] = 0x33;
    buf[1] = 0x8B;
    buf[2] = 0x9E;
    buf[3] = duration;
    buf[4] = 5;  // 5 results
    SendCmd(HCI_OP_INQUIRY,buf,sizeof(buf));
    return 0;
}

int HCI::WriteScanEnable()
{
   
    //u8 buf[2];
    //buf[0] = 0x03;
    //buf[1] = 0x01;    
    u8 buf[1];
    buf[0] = 0x03;
    
    SendCmd(HCI_OP_WRITE_SCAN_ENABLE,buf,sizeof(buf));
    return 0;
}

int HCI::AcceptConnection(const BD_ADDR* addr)
{
    //u8 buf[6+4];
    //memset(buf,0,sizeof(buf));
    //memcpy(buf,addr,6);
    //buf[7] = 0;      
    u8 buf[6+1];
    memset(buf,0,sizeof(buf));
    memcpy(buf,addr,6);
    buf[6] = 0;
    
    SendCmd(HCI_OP_ACCEPT_CONN_REQ,buf,sizeof(buf));
    return 0;
}

int HCI::SendCmd(int cmd, const u8* params, int len)
{
    u8 b[32];
    b[0] = cmd;
    b[1] = (cmd >> 8);
    b[2] = len;
    if (params)
        memcpy(b+3,params,len);
    _transport->HCISend(b,len+3);
    return 0;
}

void HCI::OnCommandComplete(int cmd, const u8* data, int len)
{
   // printf("%04X %s",cmd,CmdStr(cmd));
    if (len < 0)
        return;
    //printfBytes(" complete",data,min(16,len));

    switch (cmd)
    {
        //  Init phase 0
        case HCI_OP_RESET:  // Reset done, init chain to HCI_OP_READ_LOCAL_NAME
            SendCmd(HCI_OP_READ_BUFFER_SIZE);
            _state |= MASK_RESET;
            break;

        //  Init phase 1
        case HCI_OP_READ_BUFFER_SIZE:
            _acl_mtu = LE16(data);
            _sco_mtu = data[2];
            _acl_max_pkt = LE16(data+3);
            _sco_max_pkt = LE16(data+5);
            SendCmd(HCI_OP_READ_BD_ADDR);
            _state |= MASK_READ_BUFFER_SIZE;
            break;

        //  Init phase 2
        case HCI_OP_READ_BD_ADDR:
        {
            LocalFileSystem local("local"); 
            FILE *fp;
            fp = fopen("/local/data.p3b", "w");  
            _localAddr = *((BD_ADDR*)data); // Local Address
            printf("Local Address: ");
             printf(&_localAddr);
             fprintf(fp,&_localAddr);
             fclose(fp);
             printf("\r\n");
            _state |= MASK_READ_BD_ADDR;
            _state |= MASK_INITED;
            Callback(CALLBACK_READY,data,6);};
            break;

                   // 0CXX
        case HCI_OP_READ_LOCAL_NAME:
            break;

        case HCI_OP_READ_LOCAL_VERSION:
            // params
            //SendCmd(HCI_OP_READ_LOCAL_NAME);
            break;

        case HCI_OP_READ_LOCAL_COMMANDS:
            break;

        case HCI_OP_READ_LOCAL_FEATURES:
            //SendCmd(HCI_OP_READ_LOCAL_VERSION);
            break;

        case HCI_OP_READ_LOCAL_EXT_FEATURES:
            break;

        case HCI_OP_PIN_CODE_REPLY:
            printf("Got pin reply\r\n");
            break;

        default:
            //printf("Unrecognized Command %04X\r\n",cmd);
            break;
    }
}

void HCI::Callback(HCI_CALLBACK_EVENT c, const u8* data, int len)
{
    _callback(this,c,data,len);
}

int HCI::RemoteNameRequest(const BD_ADDR* addr)
{
    _state |= MASK_REMOTE_NAME;
    u8 buf[6+4];
    memset(buf,0,sizeof(buf));
    memcpy(buf,addr,6);
    buf[7] = 1;
    return SendCmd(HCI_OP_REMOTE_NAME_REQ,buf,sizeof(buf));
}

int HCI::CreateConnection(const BD_ADDR* remoteAddr)
{
    _state |= MASK_CREATE_CONNECTION;
    u8 buf[6+7];
    memset(buf,0,sizeof(buf));
    memcpy(buf,remoteAddr,6);
    buf[6] = 0x18;  // DM1,DH1
    buf[7] = 0xCC;  // DM3, DH3, DM5, DH5
    buf[8] = 1;     // Page Repetition R1
    return SendCmd(HCI_OP_CREATE_CONN,buf,sizeof(buf));
}

int HCI::Disconnect(const BD_ADDR* bdaddr)
{
    BTDevice* d = Find(bdaddr);
    if (!d)
        return ERR_HCI_DEVICE_NOT_FOUND;
    int handle = d->_handle;
    printf("Disconnect from %d\r\n",handle);
    _state |= MASK_CREATE_CONNECTION;
    u8 buf[3];
    buf[0] = handle;
    buf[1] = (handle >> 8);
    buf[2] = 0x13;
    return SendCmd(HCI_OP_DISCONNECT,buf,sizeof(buf));
}

void HCI::DisconnectComplete(int handle)
{
    BTDevice* d = Find(handle);
    if (!d)
        return;
    d->_handle = 0;
}

int HCI::DisconnectAll()
{
    BTDevice* devs[8];
    int count = GetDevices(devs,8);
    for (int i = 0; i < count; i++)
        Disconnect(&devs[i]->_info.bdaddr);
    return 0;
}

int HCI::PinCodeReply(const u8* data)
{
    u8 b[6+1+16];
    memset(b,0,sizeof(b));
    memcpy(b,data,6);
    b[6] = 4;
    b[7] = '0';
    b[8] = '0';
    b[9] = '0';
    b[10] = '0';
    return SendCmd(HCI_OP_PIN_CODE_REPLY,b,sizeof(b));
}

void HCI::InquiryResult(const inquiry_info* info)
{
    BTDevice* bt = Find(&info->bdaddr);
    if (!bt)    // new device
    {
        for (int i = 0; i < MAX_BTDEVICES; i++)
        {
            if (_devices[i]._state == 0)
            {
                bt = _devices + i;
                bt->_state = 1;
                break;
            }
        }
        if (!bt)
        {
            printf("HCI::InquiryResult too many devices\r\n");
            return; // Too many devices!
        }
    }

    bt->_info = *info;
}

int HCI::GetDevices(BTDevice** devices, int maxDevices)
{
    int j = 0;
    for (int i = 0; i < MAX_BTDEVICES; i++)
    {
        if (_devices[i]._state != 0)
        {
            devices[j++] = _devices + i;
            if (j == maxDevices)
                break;
        }
    }
    return j;
}

void HCI::RemoteName(const BD_ADDR* addr, const char* name)
{
    BTDevice* d = Find(addr);
    if (d)
    {
        strncpy(d->_name,name,sizeof(d->_name)-1);
        d->_name[sizeof(d->_name)-1] = 0;
    }
}

void HCI::ConnectComplete(const connection_info* info)
{
    BTDevice* d = Find(&info->bdaddr);
    if (!d)
        return;
    if (info->status == 0)
    {
        d->_handle = info->handle;
        printf("Connected on %04X\r\n",info->handle);
    } else
        printf("Connection failed with %d\r\n",info->status);
}

void HCI::ConnectRequest(const request_info* info)
{
    BTDevice* bt = Find(&info->bdaddr);
    if (!bt)    // new device
    {
        for (int i = 0; i < MAX_BTDEVICES; i++)
        {
            if (_devices[i]._state == 0)
            {
                bt = _devices + i;
                bt->_state = 1;
                break;
            }
        }
        if (!bt)
        {
            printf("HCI::ConnectRequest too many devices\r\n");
            return; // Too many devices!
        }
    }
   bt->_info.bdaddr = info->bdaddr;
   memcpy(bt->_info.dev_class,info->dev_class,3);
   AcceptConnection(&info->bdaddr);
}

void HCI::HCIRecv(const u8* data, int len)
{
    //printfBytes(EvtStr(data[0]),data,len);
    //printfBytes(EvtStr(data[0]),data,min(len,16));
    //printf("HCI Event %02X\r\n",data[0]);
    switch (data[0])
    {
        case HCI_EV_INQUIRY_COMPLETE:
            printfBytes("Inquiry Complete",data,data[1]);
            _state &= ~MASK_INQUIRY;
            Callback(CALLBACK_INQUIRY_DONE,0,0);
            WriteScanEnable();
            break;

        case HCI_EV_INQUIRY_RESULT:
            {
                const u8* end = data[1] + data + 2;
                data += 3;
                while (data < end)
                {
                    inquiry_info align;
                    memcpy(&align,data,sizeof(inquiry_info));
                    InquiryResult(&align);
                    Callback(CALLBACK_INQUIRY_RESULT,(u8*)&align,sizeof(inquiry_info));
                    data += 14;
                }
            }
            break;

        case HCI_EV_CONN_COMPLETE:
            _state &= ~MASK_CREATE_CONNECTION;
            {
                connection_info align;
                memcpy(&align,data+2,sizeof(connection_info));
                ConnectComplete(&align);
                Callback(CALLBACK_CONNECTION_COMPLETE,(u8*)&align,sizeof(connection_info));
            }
            break;

        case HCI_EV_CONN_REQUEST:
            {
                request_info align;
                memcpy(&align,data+2,sizeof(request_info));
                ConnectRequest(&align);
            }
            break;

        case HCI_EV_DISCONN_COMPLETE:
            DisconnectComplete(LE16(data+3));
            break;

        case HCI_EV_REMOTE_NAME:
            {
                BD_ADDR* addr = (BD_ADDR*)(data+3);
                const char* name = (const char*)(data + 9);
                RemoteName(addr,name);
            }
            Callback(CALLBACK_REMOTE_NAME,data+3,LE16(data+1));    // addr is in here too
            _state &= ~MASK_REMOTE_NAME;
            break;

        case HCI_EV_CMD_STATUS:
            {
                const char* errs = HCIErrStr(data[2]);
                printf("Status %s %s\r\n",CmdStr(LE16(data+4)),errs);
            }
            break;

        case HCI_EV_CMD_COMPLETE:
            OnCommandComplete(data[3] | (data[4] << 8),data+6,data[1]-4);
            break;

        case HCI_EV_PIN_CODE_REQ:
            PinCodeReply(data+2);
            break;

        case HCI_EV_LINK_KEY_REQ:
            SendCmd(HCI_OP_LINK_KEY_NEG_REPLY,data+2,6);
            break;

        default:
        ;
           // printfBytes("HCI Event:",data,data[1]+2);
    }
}

int HCI::Open(SocketInternal* sock, SocketAddrHdr* addr)
{
    L2CAPSocket* l2capsock = (L2CAPSocket*)sock;
    L2CAPAddr* l2capaddr = (L2CAPAddr*)addr;
    BTDevice* bt = Find(&l2capaddr->bdaddr);
    if (!bt)
    {
        printf("Can't open l2cap %d on ",l2capaddr->psm);
        printf(&l2capaddr->bdaddr);
        printf("\r\n");
        return ERR_HCI_DEVICE_NOT_FOUND;
    }
    l2capsock->btdevice = bt;
    return bt->Open(sock,addr);
}

int HCI::Create(SocketInternal* sock, SocketAddrHdr* addr)
{
    L2CAPSocket* l2capsock = (L2CAPSocket*)sock;
    L2CAPAddr* l2capaddr = (L2CAPAddr*)addr;
    BTDevice* bt = Find(&l2capaddr->bdaddr);
    if (!bt)
    {
        printf("HCI Create: Can't open l2cap on ");
        printf(&l2capaddr->bdaddr);
        printf("\r\n");
        return ERR_HCI_DEVICE_NOT_FOUND;
    }
    l2capsock->btdevice = bt;
    //return 0;
    return bt->Create(sock,addr);
}


int HCI::Accept(SocketInternal* sock, SocketAddrHdr* addr)
{

    printf("Call to HCI Accept \r\n"); 
    
    L2CAPSocket* l2capsock = (L2CAPSocket*)sock;
    L2CAPAddr* l2capaddr = (L2CAPAddr*)addr;
    BTDevice* bt = Find(&l2capaddr->bdaddr);
    if (!bt)
    {
        //printf("Can't open l2cap %d on ",l2capaddr->psm);
        printf("HCI Accept: Can't open l2cap on ");
        printf(&l2capaddr->bdaddr);
        printf("\r\n");
        return ERR_HCI_DEVICE_NOT_FOUND;
    }
    //l2capsock->btdevice = bt;
    return bt->Open(sock,addr);
        
}

/**
SocketInternal* HCI::Create(SocketInternal* sock)
{
    return sock;    
}
**/


int HCI::Send(SocketInternal* sock, const u8* data, int len)
{
    L2CAPSocket* l2capsock = (L2CAPSocket*)sock;
    return l2capsock->btdevice->Send(sock,data,len);    // Pointless double dispatch
}

int HCI::Close(SocketInternal* sock)
{
    L2CAPSocket* l2capsock = (L2CAPSocket*)sock;
    return l2capsock->btdevice->Close(sock);    // Pointless double dispatch
}

void HCI::ACLRecv(const u8* data, int len)
{
    int handle = LE16(data);
    BD_ADDR* addr;
    BTDevice* d = Find(handle & 0x0FFF);
    addr = &d->_info.bdaddr;
    
    if (d)
        d->ACLRecv(addr,data,len);
}

//===================================================================
//===================================================================