int main()
{
printf("Welcome to redKlyde's Networking Tutorials!\n");
printf("Tutorial #5 : Multiple Hosts - ClientSide\n\n");
// My socket
int mySocket;
// Create our client
mySocket = startupClient(7654, "localhost");
if (mySocket == -1)
{
// Hmm... an error occurred. Let's shutdown our client and bail.
shutdownClient(mySocket);
return 1;
}
// Number of bytes sent
int nBytes;
// I will define a message size so we will know how much data we will send and receive
#define MAX_MESSAGE_SIZE 4096
char buffer[MAX_MESSAGE_SIZE];
printf("Input text to send and press Enter\nType 'quit' to exit\n");
// The main loop
for (;;)
{
// Get some input from the command line
gets(buffer);
// Check if quit was typed, then exit
if (strcmp(buffer, "quit") == 0)
{
break;
}
// Get our message size
unsigned long messageSize = strlen(buffer);
// Fix our byte ordering
messageSize = htonl(messageSize);
// Send the message size
if ((nBytes = send(mySocket, (char*)&messageSize, sizeof(messageSize), 0)) == SOCKET_ERROR)
{
printf("Send Failed!\n");
}
// Re-fix our byte ordering
messageSize = ntohl(messageSize);
// Send the actual message
if ((nBytes = send(mySocket, buffer, messageSize, 0)) == SOCKET_ERROR)
{
printf("Send Failed!\n");
}
}
// Shutdown our client
shutdownClient(mySocket);
return 0;
}
int main()
{
printf("Welcome to redKlyde's Networking Tutorials!\n");
printf("Tutorial # 3 : Sending and Receiving - ClientSide\n\n");
int mySocket;
// Create our client
mySocket = startupClient(7654, "localhost");
if (mySocket == -1)
{
// Hmm... an error occurred. Shutdown our client and bail
shutdownClient(mySocket);
return 1;
}
// The number of bytes I send/read ... will also serve as my error code
int nBytes;
// I will define a message size so we will know how much data we will send and receive
#define MESSAGE_SIZE 24
// And the actual buffers
char inMessage[MESSAGE_SIZE];
char outMessage[MESSAGE_SIZE] = "I sent you this message";
// Send the message to the server
nBytes = send(mySocket, outMessage, sizeof(outMessage), 0);
// check for errors
if (nBytes == SOCKET_ERROR)
{
printf("Send Failed!\n");
}
else
{
// Print the message we sent
printf("Message Sent : %s\n", outMessage);
}
// Receive the reply from the server
nBytes = recv(mySocket, inMessage, sizeof(inMessage), 0);
// Check for errors
if (nBytes == SOCKET_ERROR)
{
printf("Recv Failed!\n");
}
else
{
// Print the received message
printf("Message Received : %s\n", inMessage);
}
// Shutdown our client
shutdownClient(mySocket);
printf("Press any key to continue ...\n");
getchar();
return 0;
}
int main()
{
printf("Welcome to redKlyde's Networking Tutorials!\n");
printf("Tutorial # 4 : Flexible Sending - ClientSide\n\n");
int mySocket;
// Create our client
mySocket = startupClient(7654, "localhost");
if (mySocket == -1)
{
// Hmm... an error occurred. Let's shutdown our client and bail.
shutdownClient(mySocket);
return 1;
}
// The number of bytes I send/read ... will also serve as my error code
int nBytes;
// Now let's make a buffer for sending our message. Better make it a big enough
// size to send the largest message we would ever want to send.
#define MAX_MESSAGE_SIZE 4096
char buffer[MAX_MESSAGE_SIZE];
// Let's fill in our buffer with some data. It doesn't matter what data we use, the important part
// is that we do not pre-determine the size of the data.
sprintf(buffer, "This is a test of my variable length send buffer");
// Calculate the size of that data
unsigned long messageSize = strlen(buffer);
// Remember to fix our byte ordering to network byte ordering
messageSize = htonl(messageSize);
// Send the message size
nBytes = send(mySocket, (char*)&messageSize, sizeof(messageSize), 0);
// Check for errors
if (nBytes == SOCKET_ERROR)
{
printf("Send Failed!\n");
}
// Fix our message size back to host ordering because we will need it to send our message
messageSize = ntohl(messageSize);
// Send the actual message
nBytes = send(mySocket, buffer, messageSize, 0);
// Check for errors
if (nBytes == SOCKET_ERROR)
{
printf("Send Failed!\n");
}
// And that is that. This concludes the basics of sending and receiving.
// If you think you know your stuff by now, try replacing the sprintf() with a gets() and type in your
// message from the command line. This way you can see the variable length sending REALLY do its job.
// If you get even more daring, alter the code on both client and server to have send () / recv() loops and
// print out all the messages you are sending, instead of having to shutdown and restart the applications
// each time.
// Let's not forget to clean up properly.
// Shutdown our client
shutdownClient(mySocket);
printf("Press any key to continue ...\n");
getchar();
return 0;
}
