private static void processChoice(int userChoice, addressBook myContacts)
{
switch (userChoice)
{
case 1:
//invoke client.sendMessage
Client myClient = new Client();
Console.WriteLine("Who would you like to send a message to? ");
myContacts.listAll();
Console.WriteLine("Please enter the number corresponding to the" +
" desired recipient: ");
int recipient = Convert.ToInt32(Console.ReadLine());
myClient.sendMessage(recipient, 6283, myContacts);
break;
case 2:
//display messages from .txt/database
Utilities myUtilities = new Utilities();
myUtilities.readMessages();
break;
case 3:
//list contacts
myContacts.listAll();
break;
default:
Console.WriteLine("Error: Invalid Input");
break;
}
}
private static void menu(addressBook myContacts)
{
int choice = 0;
int send = 1;
int view = 2;
int contacts = 3;
int quit = 4;
Console.WriteLine("Welcome to TauNet");
do
{
Console.WriteLine("What would you like to do?");
Console.WriteLine("(" + send + ") Send a Message.");
Console.WriteLine("(" + view + ") View Messages.");
Console.WriteLine("(" + contacts + ") List Contacts.");
Console.WriteLine("(" + quit + ") Quit.");
Console.WriteLine("Please enter corresponding number: ");
try {
choice = Convert.ToInt32(Console.ReadLine());
if (choice != quit)
//skip the call to processChoice method if user selects quit.
{
processChoice(choice, myContacts);
}
}
catch (Exception e)
{
Console.WriteLine("Error..... " + e.StackTrace);
}
} while (choice != quit);
}
//prompt user for input and format input
//to the protocol specification
byte[] enterMessage(int hostname, addressBook myContacts) {
//code 13 and code 10 in byte array for NL
byte[] newLine = Encoding.ASCII.GetBytes(Environment.NewLine);
ASCIIEncoding asen = new ASCIIEncoding();
byte[] message;
string sender = "itsjonnyjyo";
byte[] bSender = asen.GetBytes(sender);
string recipient = (myContacts.returnUsername(hostname)).ToLower();
byte[] bRecipient = asen.GetBytes(recipient);
string header = ("version: 0.2");
byte[] bHeader = asen.GetBytes(header);
Console.Write("Enter the string to be transmitted : ");
string body = (Console.ReadLine().ToLower());
byte[] bBody = asen.GetBytes(body);
List<byte> messageList = new List<byte>();
//Concat the elements of the message into ONE byte array
messageList.AddRange(bHeader);
messageList.AddRange(newLine);
messageList.AddRange(asen.GetBytes("from: "));
messageList.AddRange(bSender);
messageList.AddRange(newLine);
messageList.AddRange(asen.GetBytes("to: "));
messageList.AddRange(bRecipient);
messageList.AddRange(newLine);
messageList.AddRange(newLine);
messageList.AddRange(bBody);
messageList.AddRange(newLine);
message = messageList.ToArray();
return message;
}
public void sendMessage(int hostname, int port, addressBook myContacts)
{
try
{
Utilities myUtilities = new Utilities();
byte[] ba = enterMessage(hostname, myContacts);
Console.WriteLine("Connecting.....");
TcpClient tcpclnt = new TcpClient(myContacts.returnHostname(hostname), port);
Stream stm = tcpclnt.GetStream();
Console.WriteLine("Transmitting.....");
//encrypt the message
byte[] cipherText = myUtilities.encrypt(ba, 20, "password");
//Console.WriteLine("Finished encryption");
//write cipherText to current stream
stm.Write(cipherText, 0, cipherText.Length);
Console.WriteLine("Messege send succesful");
tcpclnt.Close();
}
catch (Exception e)
{
Console.WriteLine("Error..... " + e.StackTrace);
}
}
static void Main(string[] args)
{
/*
** Server runs at startup.
** Client is invoked in a new thread when
** user requests to send a message and requests
** a connection with the domain or ip that the
** user specifies.
*/
addressBook myContacts = new addressBook();
menu(myContacts);
}
