public static List<myMessage> streamfile(string filename)
{
byte[] file;
try
{
Console.WriteLine(filename);
file = File.ReadAllBytes("files/"+filename);
}
catch(Exception e)
{
Console.WriteLine("error openeing file: " );
Console.ReadLine();
return null;
}
// Console.WriteLine(Encoding.Default.GetString(file));
int file_length = file.Length;
// Console.WriteLine(file_length);
int chunk_length = Program.BUFFER_SIZE ;
List<myMessage> splitted = new List<myMessage>();
myMessage buffer = new myMessage();
int k=2;
for (int i = 0; i < file_length; i =i+chunk_length)
{
// byte[] buffer = new byte[chunk_length];
buffer = new myMessage();
buffer.data = new byte[chunk_length];
buffer.seq_no = k++ % 2; //add 1 and 0 sequece no
if (file_length < i + chunk_length)
{
chunk_length = file_length - i;
}
Array.Copy(file, i, buffer.data, 0, chunk_length);
splitted.Add(buffer);
// Console.WriteLine(buffer[j]);
// Console.WriteLine(Encoding.Default.GetString(buffer.data));
// return buffer;
// Console.WriteLine("j:"+j+" "+Encoding.Default.GetString(buffer));
// j++;
}
// foreach (myMessage x in splitted)
return splitted ;
// Console.ReadLine();
}
static public List <myMessage> streamfile(string filename)
{
byte[] file;
try
{
Console.WriteLine(filename);
file = File.ReadAllBytes("files/" + filename);
}
catch (Exception e)
{
Console.WriteLine("error openeing file: ");
Console.ReadLine();
return(null);
}
// Console.WriteLine(Encoding.Default.GetString(file));
int file_length = file.Length;
// Console.WriteLine(file_length);
int chunk_length = Program.BUFFER_SIZE;
List <myMessage> splitted = new List <myMessage>();
myMessage buffer = new myMessage();
int k = 2;
for (int i = 0; i < file_length; i = i + chunk_length)
{
// byte[] buffer = new byte[chunk_length];
buffer = new myMessage();
buffer.data = new byte[chunk_length];
buffer.seq_no = k++ % 2; //add 1 and 0 sequece no
if (file_length < i + chunk_length)
{
chunk_length = file_length - i;
}
Array.Copy(file, i, buffer.data, 0, chunk_length);
splitted.Add(buffer);
// Console.WriteLine(buffer[j]);
// Console.WriteLine(Encoding.Default.GetString(buffer.data));
// return buffer;
// Console.WriteLine("j:"+j+" "+Encoding.Default.GetString(buffer));
// j++;
}
// foreach (myMessage x in splitted)
return(splitted);
// Console.ReadLine();
}
static void Main(string[] args)
{
byte[] bytes = null;
myMessage m1 = new myMessage();
using (var mystream = new MemoryStream())
{
var bf = new BinaryFormatter();
bf.Serialize(mystream, m1);
bytes = mystream.ToArray();
}
//string filename = "SamSmith.mp3";
string filename = "SamSmith.mp3";
bytes = Encoding.ASCII.GetBytes(filename);
byte[] data = new byte[1024];
int recv;
IPEndPoint endpoint = new IPEndPoint(
IPAddress.Parse("127.0.0.1"), 950);
Socket server = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
// Console.WriteLine(welcome);
// data = Encoding.ASCII.GetBytes(welcome);
// Console.WriteLine("msg = "+ Encoding.ASCII.GetString( bytes) );
server.SendTo(bytes, bytes.Length, SocketFlags.None, endpoint);
// server.SendTo(data, data.Length, SocketFlags.None, endpoint);
// Console.WriteLine("welcome1");
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint Remote = (EndPoint)sender;
// server.SendTo(data, data.Length, SocketFlags.None, endpoint);
data = new byte[1024];
int Size = 0;
try
{
recv = server.ReceiveFrom(data, ref Remote);
Size = int.Parse(Encoding.ASCII.GetString(data));
}
catch (Exception e)
{
Console.WriteLine("Error: Maybe server is not running");
// return;
}
// Console.WriteLine("welcome3");
Console.WriteLine("Message received from {0}:", Remote.ToString());
// Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
// byte current_seq = 1;
List <myMessage> messages = new List <myMessage>();
byte[] ack = new byte[1];
ack[0] = 1;
int k = 0;
for (int i = 0; i < Size; i++)
{
//receive data
recv = server.ReceiveFrom(data, ref Remote);
//convert from data to Message object
myMessage msg_rec = (myMessage)deserialize(data);
if (msg_rec.seq_no == ack[0])
{
i--;
Console.WriteLine("DUPLICATE Packet");
//duplicate packet... dont add to list
if (simulateLoss())
{
// string ack =zero_one(msg_rec.seq_no).ToString();
//send same ack again
//reverse ack , send, then reverse
ack[0] = (byte)zero_one(ack[0]);
server.SendTo(ack, 1, SocketFlags.None, Remote);
Console.WriteLine("Sent ACk " + ack[0]);
ack[0] = (byte)zero_one(ack[0]);
}
else
{
ack[0] = (byte)zero_one(ack[0]);
Console.WriteLine("Loss ");
ack[0] = (byte)zero_one(ack[0]);
}
}
else
{
// put in a list
Console.WriteLine("Received Packet");
messages.Add(msg_rec);
//send ACK
if (simulateLoss())
{
// string ack =zero_one(msg_rec.seq_no).ToString();
server.SendTo(ack, 1, SocketFlags.None, Remote);
Console.WriteLine("Sent ACk " + ack[0]);
int x = zero_one(ack[0]);
ack[0] = (byte)x;
}
else
{
Console.WriteLine("Loss ");
ack[0] = (byte)zero_one(ack[0]);
}
}
}
//here all data is done receving so
//we want to covert from data to file
// so use the function you made to convert it to files
bytestofile(messages, filename);
Console.WriteLine("Stopping client");
Console.ReadLine();
}
static void Main(string[] args)
{
byte[] bytes = null;
myMessage m1 = new myMessage();
using (var mystream = new MemoryStream())
{
var bf = new BinaryFormatter();
bf.Serialize(mystream, m1);
bytes = mystream.ToArray();
}
//string filename = "SamSmith.mp3";
string filename = "SamSmith.mp3";
bytes = Encoding.ASCII.GetBytes(filename);
byte[] data = new byte[1024];
int recv;
IPEndPoint endpoint = new IPEndPoint(
IPAddress.Parse("127.0.0.1"), 950);
Socket server = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
// Console.WriteLine(welcome);
// data = Encoding.ASCII.GetBytes(welcome);
// Console.WriteLine("msg = "+ Encoding.ASCII.GetString( bytes) );
server.SendTo(bytes, bytes.Length, SocketFlags.None, endpoint);
// server.SendTo(data, data.Length, SocketFlags.None, endpoint);
// Console.WriteLine("welcome1");
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint Remote = (EndPoint)sender;
// server.SendTo(data, data.Length, SocketFlags.None, endpoint);
data = new byte[1024];
int Size = 0;
try
{
recv = server.ReceiveFrom(data, ref Remote);
Size = int.Parse(Encoding.ASCII.GetString(data));
}
catch (Exception e)
{
Console.WriteLine("Error: Maybe server is not running");
// return;
}
// Console.WriteLine("welcome3");
Console.WriteLine("Message received from {0}:", Remote.ToString());
// Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
// byte current_seq = 1;
List<myMessage> messages = new List<myMessage>();
byte[] ack = new byte[1];
ack[0] = 1;
int k = 0;
for (int i = 0; i < Size; i++)
{
//receive data
recv = server.ReceiveFrom(data, ref Remote);
//convert from data to Message object
myMessage msg_rec = (myMessage)deserialize(data);
if (msg_rec.seq_no == ack[0])
{
i--;
Console.WriteLine("DUPLICATE Packet");
//duplicate packet... dont add to list
if (simulateLoss())
{
// string ack =zero_one(msg_rec.seq_no).ToString();
//send same ack again
//reverse ack , send, then reverse
ack[0] = (byte)zero_one(ack[0]);
server.SendTo(ack, 1, SocketFlags.None, Remote);
Console.WriteLine("Sent ACk " + ack[0]);
ack[0] = (byte)zero_one(ack[0]);
}
else
{
ack[0] = (byte)zero_one(ack[0]);
Console.WriteLine("Loss ");
ack[0] = (byte)zero_one(ack[0]);
}
}
else
{
// put in a list
Console.WriteLine("Received Packet");
messages.Add(msg_rec);
//send ACK
if (simulateLoss())
{
// string ack =zero_one(msg_rec.seq_no).ToString();
server.SendTo(ack, 1, SocketFlags.None, Remote);
Console.WriteLine("Sent ACk " + ack[0]);
int x = zero_one(ack[0]);
ack[0] = (byte)x;
}
else
{
Console.WriteLine("Loss ");
ack[0] = (byte)zero_one(ack[0]);
}
}
}
//here all data is done receving so
//we want to covert from data to file
// so use the function you made to convert it to files
bytestofile(messages, filename);
Console.WriteLine("Stopping client");
Console.ReadLine();
}
