Download BSD Sockets Programming from a Multi-Language Perspective by M. Tim Jones PDF

By M. Tim Jones

ISBN-10: 1584502681

ISBN-13: 9781584502685

BSD Sockets Programming from a Multi-Language standpoint is written for software program builders who have to create quite a few community purposes. It starts via detailing the effective and potent makes use of of the BSD Sockets API for networked software improvement in a number of languages. From there the BSD API is roofed intimately and the aim of every functionality and socket choice is pointed out, together with the complicated behavioral side-effects of every. Having an intensive figuring out of those concerns and strategies is usually the adaptation among being a amateur community program developer. Optimizing networked functions and heading off universal pitfalls also are addressed. After the forged foundational insurance of the Sockets API partly I, half II investigates it from numerous language views. utilizing six diversified languages in all, together with primary languages (C), object-oriented languages (Java), and scripting languages (Perl), you examine the benefits and drawbacks of every language as they relate to the advance of networked purposes and the Sockets API. eventually, partly III, a collection of software program styles is mentioned for every language. styles comprise an easy HTTP server and SMTP shopper, and diverse Sockets conversation types (stream, datagram, multicast, and broadcast). those styles can be utilized because the foundation for extra advanced purposes or to offer you a quick-start whilst development networked purposes. The styles additionally remove darkness from the variations among the community APIs for every language and establish how convinced languages make styles uncomplicated and others lead them to complicated. The accompanying CD-ROM comprises the entire resource code from the ebook, together with the styles special partly III, in addition to open resource interpreters and different instruments.

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This server simply emits the date and time of the current host in string format to the client. This particular server uses stream sockets (provided by the TCP transport protocol). In Part II, we’ll look again at this application, and how it can be built using the other communications paradigms (datagram, multicast, and broadcast) in each language. Note It should be noted that socket calls are not thread safe. Thread-safe versions do exist, so when operating in a threaded environment, thread calls should be used exclusively.

The call to sprintf copies this new string into our local buffer. In line 40, we send the data to the client using the write call. We specify the socket, for the client connection, the data to emit, and the length of the data (computed using strlen). Finally, we close the new client socket in line 42. Note that our server socket (serverFd) remains open and available for new incoming connections. The client socket, per the Daytime protocol, is closed directly after the data is sent. Per the stream protocol, the socket won’t be closed right away.

1, what is interesting is the use of an IP address to define the address structure’s sin_addr element. 1). Once the bind is performed with this address, incoming connections will occur only through this interface. 1”) will be refused. 1: Binding a specific address to a server socket. 2, we see another server bind function example. This example is the more traditional use of the bind function in which all interfaces are permitted for incoming connections to the server application. This functionality is configured using the INADDR_ANY symbolic constant, which represents the wildcard address (all available interfaces).

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