7.4. The Sockets Model
Prev | Chapter 7. Sockets | Next

## 7.4. The Sockets Model

BSD sockets are built on the basic UNIX® model: Everything is a file. In our example, then, sockets would let us receive an HTTP file, so to speak. It would then be up to us to extract the PNG file from it.

Because of the complexity of internetworking, we cannot just use the `open` system call, or the `open()` C function. Instead, we need to take several steps to “opening” a socket.

Once we do, however, we can start treating the socket the same way we treat any file descriptor: We can `read` from it, `write` to it, `pipe` it, and, eventually, `close` it.

Prev | Up | Next
7.3. Protocols | Home | 7.5. Essential Socket Functions

This, and other documents, can be downloaded from http://ftp.FreeBSD.org/pub/FreeBSD/doc/

For questions about FreeBSD, read the documentation before contacting <questions@FreeBSD.org>.
For questions about this documentation, e-mail <doc@FreeBSD.org>.