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Boost.Asio C++ Network Programming Cookbook by Dmytro Radchuk

By Dmytro Radchuk

Beginning with recipes demonstrating the execution of easy Boost.Asio operations, the e-book is going directly to offer ready-to-use implementations of buyer and server purposes from easy synchronous ones to strong multithreaded scalable suggestions. eventually, you're provided with complicated themes similar to enforcing a talk program, imposing an HTTP purchaser, and including SSL help. the entire samples offered within the ebook are able to be utilized in actual initiatives simply out of the box.

As good as first-class functional examples, the ebook additionally contains prolonged supportive theoretical fabric on dispensed program layout and construction.

What you are going to learn:
- increase your operating wisdom of 1 of the main respected C++ networking libraries―Boost.Asio
- get yourself up to speed with the fundamentals of TCP and UDP protocols
- Create scalable and highly-efficient customer and server applications
- comprehend the speculation in the back of improvement of dispensed applications
- elevate the protection of your allotted purposes through including SSL support
- enforce a HTTP patron easily
- Use iostreams, scatter-gather buffers, and timers

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Sample text

A closing operation allows us to do so. Using fixed length I/O buffers Fixed length I/O buffers are usually used with I/O operations and play the role of either a data source or destination when the size of the message to be sent or received is known. For example, this can be a constant array of chars allocated on a stack, which contain a string that represents the request to be sent to the server. Or, this can be a writable buffer allocated in the free memory, which is used as a data destination point, when reading data from a socket.

For the operating system to start accepting connection requests targeted at particular endpoint associated with particular acceptor socket, that acceptor socket must be switched into listening mode. After that, the operating system allocates a queue for pending connection requests associated with this acceptor socket and starts accepting connection request addressed to it. When a new connection request arrives, it is initially received by the operating system, which puts it to the pending connection requests queue associated with an acceptor socket being the connection request's target.

When socket binding is delegated to the operating system, there is no guarantee that it will be bound to the same endpoint each time. Even if there is a single network interface and a single IP address on the host, the socket may be bound to a different protocol port number every time the implicit binding is performed. Unlike client applications that usually don't care through which IP address and protocol port number its active socket will be communicating with the remote application, the server application usually needs to bind its acceptor socket to a particular endpoint explicitly.

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