packets

I am trying to construct an IP header. An IP header has the following fields: Version, IHL, DSCP etc. I would like to populate a Byte Array such that I can store the information in bytes. Where I get confused however is that the Version field is only 4 bits wide. IHL is also only 4 bits wide. How do I fit the values of both of those fields to be represented as a byte? Do I need to do bitshifting? E.g. Version = 4, IHL = 5. I would need to create a byte that would equal 0100 0101 = 45h or 69 decimal. (byte) (4 << 4) | 5 This shifts the value 4 to the left, then sets lower 4 bits to the value 5.

Can anyone guide me in converting the KDD 99 dataset,consisting of ip packets in the following format to TCP dump format? 0,udp,private,SF,105,146,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0.00,0.00,0.00,0.00,1.00,0.00,0.00,255,254,1.00,0.01,0.00,0.00,0.00,0.00,0.00,0.00,normal. 0,udp,private,SF,105,146,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0.00,0.00,0.00,0.00,1.00,0.00,0.00,255,254,1.00,0.01,0.00,0.00,0.00,0.00,0.00,0.00,normal. 0,udp,private,SF,105,146,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0.00,0.00,0.00,0.00,1.00,0.00,0.00,255,254,1.00,0.01,0.00,0.00,0.00,0.00,0.00,0.00,normal. From the KDD99

I am trying to encode an image to base64 encoding and send it to a C++ server I am creating. I am using PHP to do that. Therefore, the PHP code is the client and the C++ code is the listening server. The problem occurs on large images; for example 70KB images. It is working properly on small images; such as 5KB. The error occurring is: Warning: socket_write() [function.socket-write] : unable to write to socket [0]: A message sent on a datagram socket was larger than the internal message buffer or some other network limit, or the buffer used to receive a datagram into was smaller than the

For receiving UDP broadcast packets from the server to an android device, i used a service class and listen for packets in a thread. It receives the packet successfully. The problem is that if multiple packets are being sent from the server in the same time then packet loss will be the result. I even tried with a queue and processing the received packets in separate thread then also i am not getting the packet. I am completely new to network programming any help would be widely appreciated void startListenForUdpBroadcast() { UDPBroadcastThread = new Thread(new Runnable() { public void run() {

According to my knowledge if an internet application has to be designed, we should use either a connection-oriented service or connection-less service, but not both. Internet's connection oriented service is TCP and connection-less service is UDP, and both resides in the transport layer of Internet Protocol stack. Internet's only network layer is IP, which is a connection-less service. So it means whatever application we design it eventually uses IP to transmit the packets. Connection-oriented services use the same path to transmit all the packets, and connection-less does not. Therefore my

I am writing code for a USB device. Suppose the USB host starts a control read transfer to read some data from the device, and the amount of data requested (wLength in the Setup Packet) is a multiple of the Endpoint 0 max packet size. Then after the host has received all the data (in the form of several IN transactions with maximum-sized data packets), will it initiate another IN transaction to see if there is more data even though there can't be more? Here's an example sequence of events that I am wondering about: USB enumeration process: max packet size on endpoint 0 is reported to be 64.