By M. Tim Jones
BSD Sockets Programming from a Multi-Language viewpoint is written for software program builders who have to create a number of community purposes. It starts off through detailing the effective and powerful 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 complex behavioral side-effects of every. Having a radical realizing of those concerns and strategies is frequently the adaptation among being a amateur community software developer. Optimizing networked purposes and warding off universal pitfalls also are addressed. After the cast foundational assurance of the Sockets API partly I, half II investigates it from numerous language views. utilizing six assorted languages in all, together with important 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 functions and the Sockets API. eventually, partly III, a suite of software program styles is mentioned for every language. styles comprise an easy HTTP server and SMTP buyer, and numerous Sockets conversation types (stream, datagram, multicast, and broadcast). those styles can be utilized because the foundation for extra complicated purposes or to offer you a quick-start while construction networked functions. The styles additionally remove darkness from the variations among the community APIs for every language and establish how yes languages make styles basic and others cause them to advanced. The accompanying CD-ROM comprises the entire resource code from the booklet, together with the styles special partially III, in addition to open resource interpreters and different instruments.
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Additional info for BSD Sockets Programming from a Multi-Language Perspective
1, we enable a read event and an exception event for our socket (represented by sock) and then call select. Note that we specify the first argument as sock+1, because this must be exactly one greater than the largest socket descriptor that was loaded in the socket descriptor sets. Because we’re looking for read events and exception events, we pass in our read set structure as argument 2, and then our exception set as argument 4 (both as references, because the select function will modify these sets).
Day Day Up > < Day Day Up > send/sendto Function The send and sendto functions are used to send data to a given peer socket through a local socket. Like the recv functions, the semantics of the functions are based upon the type of socket being used (stream or datagram), in addition to a set of flags that can be provided to the functions. The prototypes for the send and sendto functions are: "bold">send( int sock, const void *buf, int len, unsigned int flags ); Chapter 3: Standard BSD API Functions 37 38 Chapter 3: Standard BSD API Functions int sendto( int sock, const void *buf, int len, unsigned int flags, struct sockaddr *addr, socklen_t len ); The send function is used by sockets in a connected state.
Day Day Up > < Day Day Up > gethostname/sethostname Functions The gethostname function is a miscellaneous function that permits the application to identify the name of the host on which it executes. The function prototype for gethostname is defined as: "bold">gethostname( char *name, size_t len ); The caller provides a preallocated buffer pointer (of at least size 255) that the gethostname function uses to store the host name. The size of the buffer is provided as the len argument. 6. 6 Sample usage of the gethostname function.
BSD Sockets Programming from a Multi-Language Perspective by M. Tim Jones