private bool handleFileIO(byte[] buffer, int length, string filepath, int chunk, string ip, string fullname)
{
string fileData = StringCompressor.ToHexString(buffer, length);
string m = "<OBJECT>" + "FILE*" + chunk.ToString() + "*" + Path.GetFileName(filepath).Replace("?", "_") + "*" + fileData;
string chk = Sock.Checksum(Sock.Checksum(m)); // do it twice, trust me
_e = null;
AckDone.Reset();
Sock.SendToBuddy(userName, false, ip, fullname, m, null);
// wait for confirmations
AckDone.WaitOne(5000);
if (!isExit && (_e == null || !_e.Valid || _e.Checksum != chk))
{
// try to repeat once
_e = null;
AckDone.Reset();
Sock.SendToBuddy(userName, false, ip, fullname, m, null);
// wait for confirmations
AckDone.WaitOne(5000);
if (_e == null || !_e.Valid || _e.Checksum != chk)
{
return(false);
}
}
return(true);
}
public MessageEventArgs(string data)
{
if (data != null && data.Contains("|"))
{
data = data.Trim(); // important trim
int loc, loc1, loc2, loc3;
if (find4backwards(data, out loc, out loc1, out loc2, out loc3))
{
id = data.Substring(loc + 1, loc1 - loc - 1);
friendName = data.Substring(loc1 + 1, loc2 - loc1 - 1);
friendIP = data.Substring(loc2 + 1, loc3 - loc2 - 1);
textFromFriend = data.Substring(loc3 + 1, data.Length - loc3 - 1);
checksum = Sock.Checksum(textFromFriend.Replace("<EOF>", ""));
// sanity checks
if (friendIP.Split('.').Count() != 4 || id.Length > 4 || id.Length == 0)
{
valid = false;
}
else if (textFromFriend.EndsWith("<EOF>"))
{
if (textFromFriend.StartsWith("<OBJECT>FILE"))
{
isFile = true;
try
{
string[] splitObj = textFromFriend.Split('*');
this.chunkId = Convert.ToInt32(splitObj[1]);
this.fileName = splitObj[2];
this.fileData = (splitObj[3].Substring(0, splitObj[3].Length - 4 - 1));
valid = true;
}
catch
{
valid = false;
}
textFromFriend = textFromFriend.Replace("<EOF>", "");
return;
}
textFromFriend = textFromFriend.Replace("<EOF>", "");
valid = true;
}
else
{
textFromFriend = "";
}
}
}
}
private MessageEventArgs processMea()
{
string localMsg;
int myIndex;
lock (_buildMsg)
{
localMsg = _buildMsg.ToString();
myIndex = localMsg.IndexOf("<EOF>");
if (myIndex >= 0)
{
localMsg = localMsg.Substring(0, myIndex + 1 + 4).Trim();
_buildMsg.Remove(0, myIndex + 1 + 4);
}
}
if (myIndex >= 0)
{
MessageEventArgs mea = new MessageEventArgs(localMsg);
if (mea.Valid)
{
// for safety
_buddyIp = mea.FriendIP;
if (this._state == MsgState.WaitingResponse || this._state == MsgState.SendAck)
{
Sock.debug(_name + ":got ACK:" + this._state.ToString() + ":Id=" + mea.Id);
mea.IsAck = true;
if (this._state == MsgState.WaitingResponse)
{
this._state = MsgState.Done;
}
return(mea);
}
if (this._imSendingAck || mea.FriendIP == myip)
{
if (this._state == MsgState.WaitingResponse)
{
this._state = MsgState.Done;
}
return(null);
}
else if (this._state == MsgState.Idle || this._state == MsgState.ReadyForRemote)
{
this._imSendingAck = true;
_lastAckMsg = generate(mea.Id, mea.FriendName, mea.FriendIP, Sock.Checksum(mea.TextFromFriend)); // no need to send entire msg payload
_lastAckIP = mea.FriendIP;
Sock.debug(_name + ":Display(sendAck)" + this._state.ToString() + ":Id=" + mea.Id);
this._state = MsgState.ReadyForAck;
}
else
{
return(mea);
}
}
else
{
Sock.debug(_name + ": oops, invalid message received");
}
return(mea);
}
else
{
return(null);
}
}
