Category Archives: Winsock

Socket programming with winsock

UDP Socket programming in winsock – How to code Client and Server

By | July 29, 2020

UDP sockets UDP stands for User Datagram Protocol and is an alternative protocol to TCP the most common protocol used for data transfer over the internet. UDP is different from TCP in a number of ways. Most importantly UDP is a connectionless protocol. TCP vs UDP In the TCP protocol first a connection is established… Read More »

Winsock tutorial – Socket programming in C on windows

By | July 25, 2020

Socket programming with winsock This is a quick guide/tutorial to learning socket programming in C language on Windows. “Windows” because the code snippets shown over here will work only on Windows. The windows api to socket programming is called winsock. Sockets are the fundamental “things” behind any kind of network communications done by your computer…. Read More »

How to code a TCP Connect Port Scanner in C with Winsock

By | August 1, 2020

Tcp connect port scanning TCP connect() scanning is the most basic form of TCP scanning. The program performs a connect() command on those ports of the target machine which are to be checked. If the port is open then the connect() command will succeed and a connection will be established. If the port is closed… Read More »

Raw socket programming on windows with Winpcap

By | August 1, 2020

Raw sockets with winpcap A previous post explains how to send on windows xp. However the winsock api has limited raw socket support in windows versions greater than windows xp+sp1. Therefore winpcap has to be used to send raw packets on higher windows versions. Winpcap is a packet driver useful for packet capturing and sending… Read More »

Raw socket programming on windows with winsock

By | July 30, 2020

Raw sockets using winsock Raw sockets or “Raw Packets”, enable a program to access the entire contents of a packet or datagram, both for reading and writing purpose. In other words, you can fabricate a whole packet according to your likes and dislikes. For example, a TCP packet would contain an IP header, a TCP… Read More »