WISE Send Data
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Description
The communication between two WISE devices is devided into two possibilities
When number is send or received the data size is always 5 bytes - the first byte is a control byte (always 'L') and the remaining 4 bytes represents a 32 bit integer is a little endian format.
The data is sent with 512 byte segments. After each segment 4 byte response is received.
Maemo Platform
#define WISE_SEND_BUFFER_SIZE 512
int wise_send_buffer(int socket,const char* data,int data_size)
{
int transmitted=0,total_sent=0,buffer_size=0;
const char* ptr = data;
char buf[10];
if ( data==NULL || logger==NULL ) return WISE_CONNECTION_ERROR;
/* send data size */
if ( wise send int(socket,data size)!=WISE OK ) return WISE CONNECTION ERROR;
/* initial buffer size */
if ( data_size < WISE_SEND_BUFFER_SIZE ) buffer_size = data_size;
else buffer_size = WISE_SEND_BUFFER_SIZE;
/* send data */
while ( total_sent<data_size )
{
transmitted = write(socket,ptr,buffer_size);
if ( transmitted < buffer_size ) return WISE_CONNECTION_ERROR;
total_sent += transmitted;
ptr += transmitted;
if ( total_sent + WISE_SEND_BUFFER_SIZE <= data_size )
{
buffer_size = WISE_SEND_BUFFER_SIZE;
}
else buffer_size = data_size - total_sent;
transmitted = read(socket,buf,4);
if ( transmitted<4 || strcmp(buf,"ACK")!=0 )
return WISE_CONNECTION_ERROR;
}
return WISE_OK;
}
S60 Platform
#define KWiseSendBufferSize 512
void CWISEBase::SendBufferL(RSocket& aSocket, const TDesC8& aData)
{
TRequestStatus status;
TInt bufferSize(0), totalSent(0), dataSize(aData.Length());
TBuf8<4> buffer;
TSockXfrLength len;
// send data size
SendIntL(aSocket, dataSize);
// initial buffer size
if ( dataSize < KWiseSendBufferSize ) bufferSize = dataSize;
else bufferSize = KWiseSendBufferSize;
// send data
while ( totalSent < dataSize )
{
TPtrC8 ptr(aData.Mid(totalSent, bufferSize));
aSocket.Write(ptr, status);
User::WaitForRequest(status);
User::LeaveIfError(status.Int());
totalSent += bufferSize;
if ( totalSent + KWiseSendBufferSize <= dataSize )
{
bufferSize = KWiseSendBufferSize;
}
else bufferSize = dataSize - totalSent;
aSocket.RecvOneOrMore(buffer, 0, status, len);
User::WaitForRequest(status);
User::LeaveIfError(status.Int());
}
}
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