By Keir Davis, John Turner, Nathan Yocom
Skimpy assurance, the code compiles with a bazillion warnings, and for me no less than the 1st client/server examples simply undeniable do not paintings and do not supply beneficial adequate mistakes messages to determine. it is not until eventually you get to a miles later bankruptcy that you just know about debugging thoughts that *might* support. This debugging info may still both were moved ahead in the publication, or must have been forward-referenced from the 1st instance. also the booklet repeats a similar info over and over, for example in any instance that demands using the INADDR_ANY consistent, the writer explains what it stands for every and each time. this type of repetition is absolutely not appropriate in a publication fancying itself as one way or the other "definitive" but simply three hundred or so pages. additionally, instead of overlaying fine details of tangible community programming, some distance an excessive amount of is dedicated to the fundamentals of assorted protocols (the first 20+% of the book), and/or safety in particular (the final 20+% of the book). a greater identify for this booklet will be Linux community Programming *Fundamentals*, and as such this might warrant four stars, even perhaps five if it taught debugging past. As a *Definitive consultant* although it's a 2 at top; if you would like really definitive, albeit relating to Unix usually and never inevitably Linux, Stevens' "Unix community Programming" sequence is the true deal.
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Extra resources for The Definitive Guide to Linux Network Programming, 1st Edition
There are many different types of client-server applications. The simplest of them use UDP to communicate, while others use TCP/IP with higher-level application protocols such as File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP), and Simple Mail Transfer Protocol (SMTP). The specifics of a client-server system are fairly simple. On the server, the application is started, after which it negotiates with the operating system for permission to use a particular port number for accepting requests.
Ports are virtual destination “points” and allow a node to conduct multiple network communications simultaneously. They also provide a standard way to designate the point where a node can send or receive information. Conceptually, think of ports as “doors” where information can come and go from a network node. On Linux systems, the number of ports is limited to 65,535, and many of the lower port numbers are reserved, such as port 80 for web servers, port 25 for sending mail, and port 23 for telnet servers.
If you do this, however, you must use software address translation to connect your private network to a public network. 2 as its network, your company’s web server or mail server cannot use one of those addresses, since they are private. To connect your private network to a public network such as the Internet, you would need a public address for your web server or mail server. The private addresses can be “hidden” behind a single public address using a technique called Network Address Translation (NAT), where an entire range of addresses is translated into a single public address by the private network’s gateway.