Raw socket programming
Everything we send and receive on the Internet involves packets; every web page and e-mail we receive comes as a series of packets, and everything we send leaves as a series of packets. Data breaks into packets of a certain size in bytes. Each packet carries the information to identify its destination, source, and other details of the protocols that the Internet uses, along with a part of the body of our data. Network packets are split into three parts:
- Header: This contains the instructions about the data carried by the packet
- Payload: This is the data of a packet
- Trailer: This is the trailer, notify the end of the packet to receiving device
Headers for protocols like TCP/IP are provided by the kernel or operating system stack, ...
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