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This program uses code taken from another program called BlueUSB
Diff: L2CAP.cpp
- Revision:
- 0:31713f62f35b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/L2CAP.cpp Sat Dec 10 18:45:31 2011 +0000 @@ -0,0 +1,274 @@ +/* +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. +*/ + + +#include <stdio.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "Utils.h" +#include "hci.h" + +#define L2CAP_COMMAND_REJ 0x01 +#define L2CAP_CONN_REQ 0x02 +#define L2CAP_CONN_RSP 0x03 +#define L2CAP_CONF_REQ 0x04 +#define L2CAP_CONF_RSP 0x05 +#define L2CAP_DISCONN_REQ 0x06 +#define L2CAP_DISCONN_RSP 0x07 +#define L2CAP_ECHO_REQ 0x08 +#define L2CAP_ECHO_RSP 0x09 +#define L2CAP_INFO_REQ 0x0a +#define L2CAP_INFO_RSP 0x0b + + + /* L2CAP command codes */ + const char* L2CAP_ComandCodeStr(int c) + { + switch (c) + { + case L2CAP_COMMAND_REJ: return "L2CAP_COMMAND_REJ"; + case L2CAP_CONN_REQ: return "L2CAP_CONN_REQ"; + case L2CAP_CONN_RSP: return "L2CAP_CONN_RSP"; + case L2CAP_CONF_REQ: return "L2CAP_CONF_REQ"; + case L2CAP_CONF_RSP: return "L2CAP_CONF_RSP"; + case L2CAP_DISCONN_REQ: return "L2CAP_DISCONN_REQ"; + case L2CAP_DISCONN_RSP: return "L2CAP_DISCONN_RSP"; + case L2CAP_ECHO_REQ: return "L2CAP_ECHO_REQ"; + case L2CAP_ECHO_RSP: return "L2CAP_ECHO_RSP"; + case L2CAP_INFO_REQ: return "L2CAP_INFO_REQ"; + case L2CAP_INFO_RSP: return "L2CAP_INFO_RSP"; + } + return "unknown"; + } + +typedef struct +{ + u16 handle; + u16 length; // total + u16 l2capLength; // length -4 + u16 cid; // Signaling packet CID = 1 + u8 data[64]; // Largest thing to send!!! todo +} L2CAPData; + +typedef struct +{ + u16 handle; + u16 length; // total + u16 l2capLength; // length -4 + u16 cid; // Signaling packet CID = 1 + + // Payload + u8 cmd; // + u8 id; + u16 cmdLength; // total-8 + u16 params[4]; // Params +} L2CAPCmd; + +// +void BTDevice::Init() +{ + memset(&_info,0,sizeof(inquiry_info)); + _handle = 0; + _name[0] = 0; + _state = 0; +} + +// virtual SocketHandler +int BTDevice::Open(SocketInternal* sock, SocketAddrHdr* addr) +{ + L2CAPSocket* s = (L2CAPSocket*)sock; + L2CAPAddr* a = (L2CAPAddr*)addr; + s->scid = 0x40 + sock->ID-1; // are these reserved? + s->dcid = 0; + Connect(s->scid,a->psm); + return sock->ID; +} + +// virtual SocketHandler +int BTDevice::Send(SocketInternal* sock, const u8* data, int len) +{ + L2CAPData d; + L2CAPSocket* s = (L2CAPSocket*)sock; + + d.handle = _handle | 0x2000; + d.length = 4 + len; + d.l2capLength = len; + d.cid = s->dcid; + + if (len > 64) + return -1; + memcpy(d.data,data,len); + return Send((u8*)&d,len+8); +} + +// virtual SocketHandler +int BTDevice::Close(SocketInternal* sock) +{ + printf("L2CAP close %d\n",sock->ID); + L2CAPSocket* s = (L2CAPSocket*)sock; + return Disconnect(s->scid,s->dcid); +} + +L2CAPSocket* BTDevice::SCIDToSocket(int scid) +{ + return (L2CAPSocket*)GetSocketInternal(scid-0x40+1); +} + +int BTDevice::Send(const u8* data, int len) +{ + _transport->ACLSend(data,len); + return 0; +} + +int BTDevice::Send(u8 c, u8 id, u16* params, int count) +{ + L2CAPCmd cmd; + cmd.handle = _handle | 0x2000; + cmd.length = 8 + count*2; + + cmd.l2capLength = cmd.length-4; + cmd.cid = 1; // Signaling packet + + cmd.cmd = c; + cmd.id = id; + cmd.cmdLength = count*2; + for (int i = 0; i < count; i++) + cmd.params[i] = params[i]; + return Send((u8*)&cmd,cmd.length+4); +} + +int BTDevice::Connect(int scid, int psm) +{ + u16 p[2]; + p[0] = psm; + p[1] = scid; + return Send(L2CAP_CONN_REQ,_txid++,p,2); +} + +int BTDevice::Disconnect(int scid, int dcid) +{ + u16 p[2]; + p[0] = dcid; + p[1] = scid; + return Send(L2CAP_DISCONN_REQ,_txid++,p,2); +} + +int BTDevice::ConfigureRequest(int dcid) +{ + u16 p[4]; + p[0] = dcid; + p[1] = 0; + p[2] = 0x0201; // Options + p[3] = 0x02A0; // 672 + return Send(L2CAP_CONF_REQ,_txid++,p,4); +} + +int BTDevice::ConfigureResponse(u8 rxid, int dcid) +{ + u16 p[3]; + p[0] = dcid; + p[1] = 0; + p[2] = 0; + return Send(L2CAP_CONF_RSP,rxid,p,3); +} + +int BTDevice::DisconnectResponse(u8 rxid, int scid, int dcid) +{ + u16 p[2]; + p[0] = dcid; + p[1] = scid; + return Send(L2CAP_DISCONN_RSP,rxid,p,2); +} + +void BTDevice::Control(const u8* data, int len) +{ + int cc = data[8]; + printf(L2CAP_ComandCodeStr(cc)); + int result = LE16(data+16); + printf(" Result %d\n",result); + switch (cc) + { + case L2CAP_COMMAND_REJ: + break; + case L2CAP_CONN_REQ: + break; + + // Response to our initial connect from Remote + case L2CAP_CONN_RSP: + { + if (result == 0) + { + int dcid = LE16(data+12); + int scid = LE16(data+14); + L2CAPSocket* s = SCIDToSocket(scid); + if (s) + { + s->dcid = dcid; + ConfigureRequest(dcid); + } + } else + printf("Connect failed?\n"); + } + break; + + case L2CAP_CONF_RSP: + { + int scid = LE16(data+12); + SocketInternal* s = (SocketInternal*)SCIDToSocket(scid); + if (s) + s->SetState(SocketState_Open); + } + break; + + case L2CAP_CONF_REQ: + { + int scid = LE16(data+12); + L2CAPSocket* s = SCIDToSocket(scid); + if (s) + ConfigureResponse(data[9],s->dcid); + } + break; + } +} + +void BTDevice::ACLRecv(const u8* data, int len) +{ + // printfBytes("L2CP",data,16); + int handle = LE16(data); + if (handle != (0x2000 | _handle)) + return; + + int cid = LE16(data+6); + if (cid == 1) + { + Control(data,len); + return; + } + + SocketInternal* s = (SocketInternal*)SCIDToSocket(cid); + if (s) + s->Recv(data+8,LE16(data+2)-4); + else + printf("Bad event cid %d\n",cid); +}