hello,

I am learning Networking Programming in C. I am reffering Unix Network Programming vol 1 (W. Richards Stevens).i want to run the code given in this book on windows platform, if it is possible pls let me know.

i am also not able to compile those programs on Linux (Red Hat 9.0) system on gcc , it gives some "struct..... type error".

i also want to know,a network application made on Linux/Unix enviorment will work for windows or not.

Network programming is very similar between UNIX and Windows. One major difference is that under Windows you have to start and stop Winsock. If you paste the code I'd be able to tell you more.

thanks, i will be in touch with you

thanks for your reply,

The code for a simple tcp server client is as follows:
#include "unp.h"

int
main(int argc, char **argv)
{
int sockfd, n;
char recvline[MAXLINE + 1];
struct sockaddr_in servaddr;

if (argc != 2)
err_quit("usage: a.out <IPaddress>");

if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
err_sys("socket error");

bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(13); /* daytime server */
if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)
err_quit("inet_pton error for %s", argv[1]);

if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) < 0)
err_sys("connect error");

while ( (n = read(sockfd, recvline, MAXLINE)) > 0) {
recvline[n] = 0; /* null terminate */
if (fputs(recvline, stdout) == EOF)
err_sys("fputs error");
}
if (n < 0)
err_sys("read error");

exit(0);
}
how can i compile it on windows.

cheers

you need to read the README and INSTALL files in the unix network proggin tar ball. they explain how to properly compile on linux.

Does anyone know what exactly err_sys means in the code that is quoted out???

You need to get the code that Stevens uses in his book, because the #include "unp.h" contains his wrapper functions, he talks about them in the book (Chapter 2 I think)

Alternatively you could rewrite the code not to use his wrapper functions, that will help you to better understand the socket interface and when you move it over to Windows the transition will probbaly be easier.

graeme.

Hi, If you tell me email i can send you a complete server/client application example that works in Linux/BSD.
Windows has the same sockets like Linux because they both use BSD network sockets. But windows has an additional "upgrade" level, and some structs and functions has diferences because this "upgrade".
Give an email and i will send you a real working example.
From the above source code i can't see some needed include files and definitions. May be they are in unp.h but may be not.

To work with sockets in linux and windows you need this include files included:

/* OS dependent include files */
#if defined __LINUX__
#include <sys/un.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/stat.h>

/* Network sockets */
#include <sys/socket.h>
#include <arpa/inet.h>

#elif defined __WINDOWS__
#include <winsock.h>
#endif

As you can see there are some include files for the linux version and a one include file for a windows version.
Some of the linux include files are not needed but i use it in my application. The required files for linux are : "sys/socket.h", "netdb.h", "arpa/inet.h".

here are some standalone linux examples. They do not need wrappers etc and show the basics.

According to the other posts, it should not be difficult to write them platform independent. Just be aware that you need to recompile for (or on) the platform; simple copying of the executable will not work.

Hey thanks for the amazing site.

In the first programme explained in that tutorials, I compiled the programme successfully, but when executing the pgm I am getting the error,

"Connect : Connection refused
Server Connection Error"

Any ideas why????

My n/w connection is fine and where exactly do I have to look for the problem..>>>???

Is the server running?
Is your firewall blocking the connection?

Check this out.
http://wiki.linuxquestions.org/wiki/...ogramming_in_C

Here is full network socket howto with examples. This code works on Linux,BSD, Solaris and .... Windoze with some changes.