In all the instructions, isn’t this information a little bit too challenging? However, you’d want to comprehend network programming without having to wade through dozens of structs to determine whether you should call bind() before connect(), etc.
You’re in luck since I’ve dealt with everything and I’d be pleased to assist you. Right here, you are. As a decently skilled C programmer, you should be able to understand network programming with the aid of this document.
And I was able to edit the IPv6 guide to reflect the times. I’m hoping you have a good time.
Who is this for, exactly?
This article was not intended to be a comprehensive reference but rather an instructional. This guide should be helpful, especially for those just getting started with socket programming and who aren’t quite sure where to start.
And perhaps you’ve learned enough from this to finally comprehend these annoying manual pages.
Compiler and Platform
The gcc compiler was used to compile the code on a Linux computer (GNU C compiler). However, it ought to function on any system that supports the gcc. Naturally, this does not apply to Windows; for additional details, please see here.
Official Website and Book Shop
The URL for this document’s official version is http://beej.us/guide/bgnet/. Additionally, there are links to additional language versions as well as the sample code. There are also books available to purchase for physical possession. The author is undoubtedly anticipating your contribution. The language of this work is English, it should be emphasized.
A word to the programmers of Solaris/SunOS
You must take into account a few parameters while compiling on Solaris or SunOS operating systems in order to ensure that the libraries (libraries) are linked appropriately. The following so-called switches are added at the end of the compile command “-lnsl -lsocket -lresolv” to do this. After that, everything appears as follows:
$ cc -o server server.c -lnsl -lsocket -lresolv
If issues continue to appear, you can add “-lxnet” at the end. I’m not sure what this accomplishes precisely, but it must have been necessary for some to get everything up and running.
Calling setsockopt may also be problematic for you (). This is because Linux is different. Simply replacing the next line will fix this. in place of
int yes=1, thus you type: char yes=’1′;
For Windows programmers only
I’ve been bugging Windows for a while now, but that’s only because I don’t really like Windows. But I should be honest and tell you that Windows is still a respectable operating system because it is present on so many machines.
I can claim that I’m much happier now that I haven’t used Windows in almost ten years. I can just say, “Okay, use Windows,” and I can relax. But to be really honest, saying something like that kind of irritates me.
I can only suggest that you utilize a Unix-based system like Linux, BSD, or another one.
But since everyone has their own preferences, it should please you Windows programmers to know that most of the information presented here is equally applicable to Windows, albeit with small, if any, adjustments.
One fantastic feature is the ability to install Cygwin, which offers a set of Unix tools for Windows. On Windows, everything is said to be compilable without any modifications.
However, there should be individuals who prefer to use a typical Windows system. That’s awful. Get Unix right away. Do it now! No, that’s nonsense. I’m actually trying to be (more) friendly toward Windows, so of course I don’t mean it seriously.
If you want to do it without using Cygwinn, follow these steps. To begin with, you should essentially disregard all of the system header files described below. You only need to include the following:
#include
Wait! Before using the socket library, you must additionally run WSAStartup(). The following code can be used to accomplish this:
#include { WSADATA wsaData; // if this doesn’t work //WSAData wsaData; // then try this instead
// MAKEWORD(1,1) for Winsock 1.1, MAKEWORD(2,0) for Winsock 2.0:
if (WSAStartup(MAKEWORD(1,1), &wsaData) != 0) { fprintf(stderr, “WSAStartup failed.\n”); exit(1); }
Additionally, you must instruct the compiler to link the Winsock library, commonly known as ws2 32.lib for Winsock 2.0 or wsock32.lib in other cases. This can be done in VC++ by using the Project menu. Look for a box labeled Object/library modules by selecting Settings from the menu and then clicking the Link Tab. Add the necessary libraries, such as wsock32.lib, and you’re done.
When your socket library is finished, all that is left to do is call WSACleanup(). If you require further information, you can look online.
With a few exceptions, the remainder of this guide should function on your Windows PC after you’ve completed that. For instance, you must use closesocket() instead of calling close() to close a socket.
This work is published under the Creative Commons Attribution- Noncommercial- No Derivative Works 3.0 License with the restrictions noted below for source code and translations. Visit http://creativecommons.org/licenses/by-nc-nd/3.0/ to view a copy of this license, or write to Creative Commons at 171 Second Street, Suite 300, San Francisco, California, 94105, USA, for more information.
This guide may be freely translated into any language as long as the translation is accurate and the guide is reproduced in its entirety. This constitutes one unique exception to the “No Derivative Works” portion of the license. The translation is subject to the same licensing restrictions as the original guide.