/*---------------------------------------------------------------------------
* OBEXH_BuildByteSeq()
*---------------------------------------------------------------------------
*
* Synopsis: Builds Byte Sequence and UNICODE style OBEX headers. Used by
* both client and server functions.
*
* Return: TRUE if headers could be added.
* FALSE if headers would exceed limits on buffer or transmit space.
*/
BOOL OBEXH_BuildByteSeq(ObexAppHandle *AppHndl, ObexHeaderType Type, const U8 *Value, U16 Len)
{
OS_LockObex();
#if XA_ERROR_CHECK == XA_ENABLED
if (!AppHndl || !ObIsHeaderSpaceAvail(AppHndl, (U16)(Len+3)) ||
((Type & 0xC0) != 0x40 && (Type & 0xC0) != 0)) {
OS_UnlockObex();
return FALSE;
}
#endif /* XA_ERROR_CHECK == XA_ENABLED */
ASSERT(AppHndl && AppHndl->buffer != 0);
ASSERT(ObIsHeaderSpaceAvail(AppHndl, (U16)(Len+3)) &&
((Type & 0xC0) == 0x40 || (Type & 0xC0) == 0));
if (Type == OBEXH_END_BODY) {
AppHndl->appHeaderIsEndBody = TRUE;
}
AppHndl->buffer[AppHndl->txLength++] = Type;
AppHndl->buffer[AppHndl->txLength++] = (U8)((Len+3) >> 8);
AppHndl->buffer[AppHndl->txLength++] = (U8) (Len+3);
if (Len > 0) {
ASSERT( Value != 0 );
OS_MemCopy(AppHndl->buffer+AppHndl->txLength, Value, Len);
AppHndl->txLength += Len;
}
OS_UnlockObex();
return TRUE;
}
/*---------------------------------------------------------------------------
* OBEXH_FlushHeaders()
*---------------------------------------------------------------------------
*
* Synopsis: This function is used to flush any constructed headers from
* the header buffer. This function is used when OBEXH_Build...()
* functions are used and the operation is cancelled before the
* headers are sent or if the requested Operation fails to start.
*
* Return: void
*/
void OBEXH_FlushHeaders(ObexAppHandle *AppHndl)
{
ASSERT(AppHndl);
OS_LockObex();
AppHndl->txLength = 0;
OS_UnlockObex();
}
/*---------------------------------------------------------------------------
* OBEXH_Build1Byte()
*---------------------------------------------------------------------------
*
* Synopsis: Builds 1-byte style OBEX headers. Used by both client and
* server functions.
*
* Return: TRUE if headers could be added.
* FALSE if headers would exceed limits on buffer or transmit space.
*/
BOOL OBEXH_Build1Byte(ObexAppHandle *AppHndl, ObexHeaderType Type, U8 Value)
{
OS_LockObex();
#if XA_ERROR_CHECK == XA_ENABLED
if (!AppHndl || !ObIsHeaderSpaceAvail(AppHndl, 2) || (Type & 0xC0) != 0x80) {
OS_UnlockObex();
return FALSE;
}
#endif /* XA_ERROR_CHECK == XA_ENABLED */
ASSERT(AppHndl && AppHndl->buffer != 0);
ASSERT(ObIsHeaderSpaceAvail(AppHndl, 2) && (Type & 0xC0) == 0x80);
AppHndl->buffer[AppHndl->txLength++] = Type;
AppHndl->buffer[AppHndl->txLength++] = Value;
OS_UnlockObex();
return TRUE;
}
/*---------------------------------------------------------------------------
* OBEXH_BuildEmptyEndBody()
*---------------------------------------------------------------------------
*
* Synopsis: Builds empty OBEX headers. Used by both client and
* server functions.
*
* Return: TRUE if headers could be added.
* FALSE if headers would exceed limits on buffer or transmit space.
*/
BOOL OBEXH_BuildEmptyEndBody(ObexAppHandle *AppHndl)
{
OS_LockObex();
#if XA_ERROR_CHECK == XA_ENABLED
if (!AppHndl || !ObIsHeaderSpaceAvail(AppHndl, 1)) {
OS_UnlockObex();
return FALSE;
}
#endif /* XA_ERROR_CHECK == XA_ENABLED */
ASSERT(AppHndl && AppHndl->buffer != 0);
ASSERT(ObIsHeaderSpaceAvail(AppHndl, 1));
AppHndl->buffer[AppHndl->txLength++] = OBEXH_END_BODY;
AppHndl->buffer[AppHndl->txLength++] = 0x00;
AppHndl->buffer[AppHndl->txLength++] = 0x03;
OS_UnlockObex();
return TRUE;
}
/*---------------------------------------------------------------------------
* OBEXH_Build4Byte()
*---------------------------------------------------------------------------
*
* Synopsis: Builds 4-byte style OBEX headers. Used by both client and
* server functions.
*
* Return: TRUE if headers could be added.
* FALSE if headers would exceed limits on buffer or transmit space.
*/
BOOL OBEXH_Build4Byte(ObexAppHandle *AppHndl, ObexHeaderType Type, U32 Value)
{
OS_LockObex();
#if XA_ERROR_CHECK == XA_ENABLED
if (!AppHndl || !ObIsHeaderSpaceAvail(AppHndl, 5) || ((Type & 0xC0) != 0xC0)) {
OS_UnlockObex();
return FALSE;
}
#endif /* XA_ERROR_CHECK == XA_ENABLED */
ASSERT(AppHndl && AppHndl->buffer != 0);
ASSERT(ObIsHeaderSpaceAvail(AppHndl, 5) && (Type & 0xC0) == 0xC0);
AppHndl->buffer[AppHndl->txLength++] = Type;
StoreBE32( AppHndl->buffer+AppHndl->txLength, Value);
AppHndl->txLength += 4;
OS_UnlockObex();
return TRUE;
}
/*---------------------------------------------------------------------------
* OBEXH_GetAvailableTxHeaderLen()
*---------------------------------------------------------------------------
*
* Synopsis: Returns the amount of header space available for adding more
* headers. This value is constrained by the OBEX Packet size,
* the application provided header buffer size and any headers
* which are already present in the buffer.
*
* Return: Available header buffer length in bytes.
*/
U16 OBEXH_GetAvailableTxHeaderLen(ObexAppHandle *AppHndl)
{
#if OBEX_SERVER_CONS_SIZE > 0 || OBEX_SESSION_SUPPORT == XA_ENABLED
void *ObexApp = AppHndl;
#endif /* OBEX_SERVER_CONS_SIZE > 0 || OBEX_SESSION_SUPPORT == XA_ENABLED */
U16 avail;
ASSERT(AppHndl);
OS_LockObex();
/* Just assume Connect to get a size that will always work. */
avail = ObParserMaxHbSize(&AppHndl->parser, OB_OPCODE_CONNECT);
#if (OBEX_SERVER_CONS_SIZE > 0) || (OBEX_SESSION_SUPPORT == XA_ENABLED)
if (IsServerParser(&AppHndl->parser)) {
#if OBEX_ROLE_SERVER == XA_ENABLED
avail -= OSC(protoTxLen);
#endif /* OBEX_ROLE_SERVER == XA_ENABLED */
}
#if OBEX_SESSION_SUPPORT == XA_ENABLED
else {
ASSERT(IsClientParser(&AppHndl->parser));
#if OBEX_ROLE_CLIENT == XA_ENABLED
avail -= OCC(protoTxLen);
#endif /* OBEX_ROLE_CLIENT == XA_ENABLED */
}
#endif /* OBEX_SESSION_SUPPORT == XA_ENABLED */
#endif /* (OBEX_SERVER_CONS_SIZE > 0) || (OBEX_SESSION_SUPPORT == XA_ENABLED) */
avail = min(avail, AppHndl->length);
avail -= AppHndl->txLength;
OS_UnlockObex();
return avail;
}
/*---------------------------------------------------------------------------
* OBEXH_ParseTlv
*---------------------------------------------------------------------------
*
* Synopsis: Sniffs out a TLV from the current header
*
* Return: TRUE if parsing was successful.
* FALSE if an error occurred or no more TLVs are present.
*/
BOOL OBEXH_ParseTlv(ObexAppHandle *AppHndl, ObexTlv *tlv)
{
U8 *buffer;
U16 len;
U8 toUse;
BOOL success = FALSE;
CheckUnlockedParm(FALSE, AppHndl && tlv);
OS_LockObex();
/* On the first OBxx_HEADER_RX indication there is no data available.
* Use this event to initialize the parser.
*/
if (AppHndl->parser.dataLen == 0) {
/* ASSERT that we are in the correct internal state to parse
* this header, and that it is a byte sequence header
*/
ASSERT((AppHndl->parser).rxState == OBSC_RX_PUT_HEAD2);
ASSERT(((AppHndl->parser).header & 0xC0) == 0x40);
/* Initialize key fields */
AppHndl->tlv.state = 0;
buffer = 0;
len = 0;
goto Done;
}
/* Use these locals as aliases for the AppHndl fields */
buffer = AppHndl->tlv.headerBuff;
len = AppHndl->tlv.headerLen;
if (buffer == 0) {
buffer = AppHndl->parser.rxBuff;
len = AppHndl->parser.dataLen;
}
while (len)
{
switch (AppHndl->tlv.state) {
case 0: /* Buff points to option type */
AppHndl->tlv.tag = *buffer++;
AppHndl->tlv.state = 1;
len--;
break;
case 1: /* Buff points to option length */
AppHndl->tlv.length = *buffer++;
AppHndl->tlv.state = 2;
AppHndl->tlv.valuePos = 0;
len--;
/* No break; fall through to handle option data */
case 2:
/* Update length of option data we currently need. */
toUse = min(AppHndl->tlv.length - AppHndl->tlv.valuePos, len);
/* Fill in tlv values in case they are necessary */
tlv->tag = AppHndl->tlv.tag;
tlv->length = AppHndl->tlv.length;
/* Is reassembly both necessary and possible for this TLV? */
#if OBEX_TLV_BUFF_SIZE > 0
if ((toUse < AppHndl->tlv.length) &&
(AppHndl->tlv.length < OBEX_TLV_BUFF_SIZE)) {
/* Append recevied data into our staging buffer */
OS_MemCopy(AppHndl->tlv.value + AppHndl->tlv.valuePos,
buffer, toUse);
AppHndl->tlv.valuePos += toUse;
tlv->value = AppHndl->tlv.value;
tlv->valueLen = AppHndl->tlv.length;
len -= toUse;
buffer += toUse;
/* Indicate success ONLY if we have completed staging */
tlv->remainLen = (tlv->length - AppHndl->tlv.valuePos);
success = (tlv->remainLen == 0);
} else {
#endif /* OBEX_TLV_BUFF_SIZE > 0 */
/* If reassembly is impossible or unnecessary, simply copy
* tag information */
tlv->value = buffer;
tlv->valueLen = toUse;
AppHndl->tlv.valuePos += toUse;
len -= toUse;
buffer += toUse;
/* Indicate "last" if we are indicating the last chunk of bytes
* as counted by valuePos
*/
tlv->remainLen = (tlv->length - AppHndl->tlv.valuePos);
/* Indicate success because staging isn't going to happen */
success = TRUE;
#if OBEX_TLV_BUFF_SIZE > 0
}
#endif /* OBEX_TLV_BUFF_SIZE > 0 */
if (success)
{
/* If we have reached the end of the tlv then reset state for
* next time */
if (tlv->remainLen == 0) {
AppHndl->tlv.state = 0;
}
goto Done;
}
break;
}
}
/* If control gets here we have exhausted the buffer */
buffer = 0;
Done:
/* Reset buffer/length from locals and return success */
AppHndl->tlv.headerBuff = buffer;
AppHndl->tlv.headerLen = len;
OS_UnlockObex();
return success;
}
/*---------------------------------------------------------------------------
* OBEXH_BuildAuthResponse
*---------------------------------------------------------------------------
*
* Synopsis: This function is used by applications to build an Authentication
* response to a received Challenge. The header is constructed from
* the fields in the ObexAuthResponse structure.
*
* Return: TRUE if header was successfully built.
* FALSE if headers would exceed limits on buffer or transmit space.
*/
BOOL OBEXH_BuildAuthResponse(ObexAppHandle *AppHndl, ObexAuthResponse *Response,
U8 *Nonce)
{
U8 len;
xMD5Context context;
//#if XA_DEBUG == XA_ENABLED
U8 *orig;
//#endif /* XA_DEBUG == XA_ENABLED */
OS_LockObex();
#if XA_ERROR_CHECK == XA_ENABLED
if (!AppHndl || !Response || !Nonce) {
OS_UnlockObex();
return FALSE;
}
#endif /* XA_ERROR_CHECK == XA_ENABLED */
ASSERT(AppHndl && Response && Nonce);
len = CALC_RESPONSE_LEN(Response);
//#if XA_DEBUG == XA_ENABLED
orig = AppHndl->buffer + AppHndl->txLength;
//#endif /* XA_DEBUG == XA_ENABLED */
#if XA_ERROR_CHECK == XA_ENABLED
if (!ObIsHeaderSpaceAvail(AppHndl, (U16)(len+3))) {
OS_UnlockObex();
return FALSE;
}
#endif
ASSERT(ObIsHeaderSpaceAvail(AppHndl, (U16)(len+3)));
/* Build the OBEX Response Header Identifier */
AppHndl->buffer[AppHndl->txLength++] = OBEXH_AUTH_RESP;
AppHndl->buffer[AppHndl->txLength++] = (U8)((len+3) >> 8);
AppHndl->buffer[AppHndl->txLength++] = (U8) (len+3);
/* Build digest from nonce and password */
AppHndl->buffer[AppHndl->txLength++] = 0; /* Request Digest Code */
AppHndl->buffer[AppHndl->txLength++] = AUTH_NONCE_LEN; /* Digest Length (16 bytes) */
xMD5Init(&context);
xMD5Update(&context, Nonce, AUTH_NONCE_LEN);
xMD5Update(&context, (U8 *)":", 1);
xMD5Update(&context, Response->password, Response->passwordLen);
xMD5Final(AppHndl->buffer+AppHndl->txLength, &context);
AppHndl->txLength += AUTH_NONCE_LEN;
/* Add UserId */
if (Response->userIdLen) {
AppHndl->buffer[AppHndl->txLength++] = 1; /* UserId */
AppHndl->buffer[AppHndl->txLength++] = Response->userIdLen; /* Realm Len */
OS_MemCopy(AppHndl->buffer+AppHndl->txLength, Response->userId, Response->userIdLen);
AppHndl->txLength += Response->userIdLen;
}
/* Add Nonce */
AppHndl->buffer[AppHndl->txLength++] = 2; /* Nonce */
AppHndl->buffer[AppHndl->txLength++] = AUTH_NONCE_LEN; /* (16 bytes) */
OS_MemCopy(AppHndl->buffer+AppHndl->txLength, Nonce, AUTH_NONCE_LEN);
AppHndl->txLength += AUTH_NONCE_LEN;
//#if XA_DEBUG == XA_ENABLED
ASSERT((orig + len + 3) == (AppHndl->buffer + AppHndl->txLength));
//#endif
OS_UnlockObex();
return TRUE;
}
/*---------------------------------------------------------------------------
* OBEXH_BuildAuthChallenge
*---------------------------------------------------------------------------
*
* Synopsis: OBEX applications use this function to build an Authentication
* Challenge header. The header is constructed from the field
* values in the ObexAuthChallenge structure.
*
* Return: TRUE if header was successfully built.
* FALSE if headers would exceed limits on buffer or transmit space.
*/
BOOL OBEXH_BuildAuthChallenge(ObexAppHandle *AppHndl, ObexAuthChallenge *Challenge,
U8 *NonceOut)
{
U8 len;
//#if XA_DEBUG == XA_ENABLED
U8 *orig;
//#endif /* XA_DEBUG == XA_ENABLED */
OS_LockObex();
#if XA_ERROR_CHECK == XA_ENABLED
if (!AppHndl || !Challenge ) {
OS_UnlockObex();
return FALSE;
}
#endif /* XA_ERROR_CHECK == XA_ENABLED */
ASSERT(AppHndl && Challenge);
len = CALC_CHALLENGE_LEN(Challenge);
//#if XA_DEBUG == XA_ENABLED
orig = AppHndl->buffer + AppHndl->txLength;
//#endif /* XA_DEBUG == XA_ENABLED */
#if XA_ERROR_CHECK == XA_ENABLED
if (!ObIsHeaderSpaceAvail(AppHndl, (U16)(len+3))) {
OS_UnlockObex();
return FALSE;
}
#endif /* XA_ERROR_CHECK == XA_ENABLED */
ASSERT(ObIsHeaderSpaceAvail(AppHndl, (U16)(len+3)));
/* Build the OBEX Challenge Header Identifier */
AppHndl->buffer[AppHndl->txLength++] = OBEXH_AUTH_CHAL;
AppHndl->buffer[AppHndl->txLength++] = (U8)((len+3) >> 8);
AppHndl->buffer[AppHndl->txLength++] = (U8) (len+3);
/* Build nonce from challenge string */
AppHndl->buffer[AppHndl->txLength++] = 0; /* Nonce Code */
AppHndl->buffer[AppHndl->txLength++] = AUTH_NONCE_LEN; /* (16 bytes) */
MD5(AppHndl->buffer+AppHndl->txLength, Challenge->challenge, Challenge->challengeLen);
if (NonceOut)
OS_MemCopy(NonceOut, AppHndl->buffer+AppHndl->txLength, AUTH_NONCE_LEN);
AppHndl->txLength += AUTH_NONCE_LEN;
/* Add Options */
if (Challenge->options) {
AppHndl->buffer[AppHndl->txLength++] = 1; /* Options Code */
AppHndl->buffer[AppHndl->txLength++] = 1; /* Options Len */
AppHndl->buffer[AppHndl->txLength++] = Challenge->options; /* Options */
}
/* Add Realm */
if (Challenge->realmLen) {
AppHndl->buffer[AppHndl->txLength++] = 2; /* Realm Code */
AppHndl->buffer[AppHndl->txLength++] = Challenge->realmLen; /* Realm Len */
OS_MemCopy(AppHndl->buffer+AppHndl->txLength, Challenge->realm, Challenge->realmLen);
AppHndl->txLength += Challenge->realmLen;
}
//#if XA_DEBUG == XA_ENABLED
ASSERT((orig + len + 3) == (AppHndl->buffer + AppHndl->txLength));
//#endif
OS_UnlockObex();
return TRUE;
}
/*---------------------------------------------------------------------------
* TcpCallback
*---------------------------------------------------------------------------
*
* Synopsis: Process events from the client and server transport.
*
*/
static void TcpCallback(ObTcpCommonTransport *txp, U8 EventType, void *Parm1, U16 Parm2)
{
#if (OBEX_ROLE_SERVER == XA_ENABLED) || (OBEX_ALLOW_SERVER_TP_CONNECT == XA_ENABLED)
I32 rcode;
#endif /* (OBEX_ROLE_SERVER == XA_ENABLED) || (OBEX_ALLOW_SERVER_TP_CONNECT == XA_ENABLED) */
OS_LockObex();
switch (EventType) {
#if (OBEX_ROLE_SERVER == XA_ENABLED) || (OBEX_ALLOW_SERVER_TP_CONNECT == XA_ENABLED)
case TCP_EVENT_CONNECT_IND: /* TCP Server Event */
/* Accept the incoming connection to our server if it's idle. */
if (OBPROT_LinkTransport(txp->app, &txp->transport)) {
ASSERT(txp->state == OCS_IDLE);
txp->state = OCS_CONNECTING;
/* Save the connection handle */
txp->conn = accept(((ObTcpServerTransport *)txp)->serverReg, 0, 0);
ASSERT(txp->conn != INVALID_SOCKET);
rcode = WSAAsyncSelect(txp->conn, asyncEventHandle, WM_SELECT, FD_WRITE|FD_CLOSE);
ASSERT(rcode != SOCKET_ERROR);
} else {
/* Reject the connection, the parser is busy. */
txp->conn = accept(((ObTcpServerTransport *)txp)->serverReg, 0, 0);
ASSERT(txp->conn != INVALID_SOCKET);
closesocket(txp->conn);
txp->conn = INVALID_SOCKET;
}
break;
#endif /* (OBEX_ROLE_SERVER == XA_ENABLED) || (OBEX_ALLOW_SERVER_TP_CONNECT == XA_ENABLED) */
case TCP_EVENT_CONNECTED:
/* Save the new connection handle (Client only) */
txp->conn = Parm2;
txp->state = OCS_CONNECTED;
/* Tell the application that the server has accepted a connection */
OBPROT_Connected(txp->app);
break;
case TCP_EVENT_DATA_IND:
/* Pass data directly to the client parser */
OBPROT_ParseRx(txp->app, Parm1, Parm2);
break;
case TCP_EVENT_DISCON:
txp->conn = INVALID_SOCKET;
/* This can happen if TCPSTACK_ClientDisconnect() is called while
* a connect is in progress. When disconnect is handled synchronously.
*/
if (txp->state == OCS_IDLE)
break;
txp->state = OCS_IDLE;
txp->conn = INVALID_SOCKET;
/* This call will deliver a disconnect indication to the app. */
OBPROT_Disconnected(txp->app, ODR_UNKNOWN);
break;
}
OS_UnlockObex();
}
