bool PBBP::receiveByte(uint8_t *b) {
bool parity_val = 0;
*b = 0;
uint8_t next_bit = 0x80;
bool value;
// Receive data bits
while (next_bit) {
if (!receiveBit(&value))
return false;
if (value) {
*b |= next_bit;
parity_val ^= 1;
}
next_bit >>= 1;
}
// Receive parity bit
if (!receiveBit(&value))
return false;
if (value == parity_val) {
this->last_error = PARITY_ERROR;
return false;
}
return receiveReady() && receiveAck();
}
/// <summary>
/// Send the specified buffer and size.
/// </summary>
/// <param name='buffer'>
/// Buffer.
/// </param>
/// <param name='size'>
/// Size.
/// </param>
void Transport::send(char buf[], short size)
{
memcpy(this->buffer+ACKSIZE, buf, size);
buffer[SEQNO]=seqNo;
buffer[TYPE]=DATA;//type = data
checksum->calcChecksum(buffer,size+ACKSIZE);
// Fremprovokeret fejl
errorCount++;
if(errorCount == 5)
buffer[0]++;
link->send(this->buffer,size+ACKSIZE);//header + data
if(errorCount==5)
buffer[0]--;
while(!receiveAck())
{
std::cout<<"Error did not receive ACK in transportlayer\r\n";
link->send(this->buffer,size+ACKSIZE);//header + data
}
std::cout<<"ACK receieved in transportlayer\r\n";
return;
}
void ElevatorController::sendRegistration() {
rt_printf("EC%d: Sending EC->GD registration...", (unsigned int)this->getID());
sendMessage(RegisterWithGDMessage(this->getID()));
rt_printf("done.\n");
receiveAck();
}
bool PBBP::sendByte(uint8_t b) {
bool parity_val = 0;
bool ok = true;
uint8_t next_bit = 0x80;
while (next_bit && ok) {
if (b & next_bit)
parity_val ^= 1;
if (!sendBit(b & next_bit))
return false;
next_bit >>= 1;
}
return sendBit(!parity_val) && receiveReady() && receiveAck();
}
int main(int argc, char **argv) {
char buffer[MAXLINE];
//
// Check for host name and port number.
//
if (argc != 3) {
fprintf(stderr,"usage: %s <host> <port>\n", argv[0]);
exit(0);
}
//
// Connect to the server.
//
int server = connectToServer(argv[1],atoi(argv[2]));
printf("Welcome to the remote SOLITAIRE game for MATH 442.\n\n");
printf("Here is a key of possible card plays you can make:\n");
printf("\tplay <face><suit> - throw a card onto an arena pile in the center.\n");
printf("\tmove k<suit> - move a king onto an empty pile.\n");
printf("\tmove <face><suit> <face><suit>- move a card, putting it on top of another card.\n");
printf("\tdraw - draw and overturn the next card, placing it on the discard pile.\n");
printf("where <face> is one of a,2,3,...,9,t,j,q,k and <suit> is one of d,c,s,h.\n");
//
// Send a series of solitaire play commands.
//
while (1) {
printf("\nEnter a card play: ");
fgets(buffer,MAXLINE,stdin);
write(server,buffer,strlen(buffer)+1);
if (receiveAck(server)) {
printf("Done!\n");
} else {
printf("That play wasn't made.\n");
}
}
}
