C++ Sockets Help

[Lappy]

I'm attempting to create a small project with C++, but I'm not very knowledgeable in the language.
So can anyone help me out by linking or posting a sockets script for it.

[Spoco]

If you know next to nothing about C++, you seriously don't want to dive in to using sockets. You will get nowhere.

But, if it's Windows that you're talking about, then here's a Winsock video tutorial for you: [URL]http://www.youtube.com/watch?v=w5MPIkveJoQ[/URL]

[Lappy]

I have used sockets in the past and I'm pretty good at catching on, I have a client ready in a different language and just need to make the server.

[Cathbadh]

Here's the code that the Berkeley Sockets wikipedia page posts. Big fan of BSD sockets and natively supported by all OS's.
[cpp] /* Server code in C */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int main(void)
{
struct sockaddr_in stSockAddr;
int SocketFD = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

if(-1 == SocketFD)
{
perror("can not create socket");
exit(EXIT_FAILURE);
}

memset(&stSockAddr, 0, sizeof(struct sockaddr_in));

stSockAddr.sin_family = AF_INET;
stSockAddr.sin_port = htons(1100);
stSockAddr.sin_addr.s_addr = INADDR_ANY;

if(-1 == bind(SocketFD,(const struct sockaddr *)&stSockAddr, sizeof(struct sockaddr_in)))
{
perror("error bind failed");
close(SocketFD);
exit(EXIT_FAILURE);
}

if(-1 == listen(SocketFD, 10))
{
perror("error listen failed");
close(SocketFD);
exit(EXIT_FAILURE);
}

for(;;)
{
int ConnectFD = accept(SocketFD, NULL, NULL);

if(0 > ConnectFD)
{
perror("error accept failed");
close(SocketFD);
exit(EXIT_FAILURE);
}

/* perform read write operations ... */

shutdown(ConnectFD, SHUT_RDWR);

close(ConnectFD);
}
return 0;
}
[/cpp]
Keep in mind that this server can only handle one connection at a time.

[Eleventeen]

for(;;)?

Why not while()?

[Cathbadh]

<Anticipating an onslaught of whining about me posting C code>

[editline]11:09AM[/editline]

[QUOTE=Eleventeen;18079765]for(;;)?

Why not while()?[/QUOTE]
No particular reason. A while loop is just a special case of a for loop. Many programmers do it this way.

[Lappy]

Since that is C code will it work with C++?

[Stickmoose]

[QUOTE=Lappy;18080008]Since that is C code will it work with C++?[/QUOTE]
You should probably just give up now.
But to answer your question, yes.

[jA_cOp]

[QUOTE=Cathbadh;18079540]Big fan of BSD sockets and natively supported by all OS's.[/QUOTE]

WinSock is only based on BSD sockets, it's not directly compatible and as such Windows does not "natively support" BSD sockets.

Your code snippet wouldn't work by a long shot, for example.

[Cathbadh]

[QUOTE=jA_cOp;18080200]WinSock is only based on BSD sockets, it's not directly compatible and as such Windows does not "natively support" BSD sockets.

Your code snippet wouldn't work by a long shot, for example.[/QUOTE]
The only thing that wouldn't work is the posix parts, like perror() and close(), and those have Windows equivalents. I'm not sure what you mean by "wouldn't work by a long shot"
perror() is just for error reporting and is an acceptable loss (but you should still detect and report errors). close() can just be replaced by closesocket().

[jA_cOp]

[QUOTE=Cathbadh;18080279]The only thing that wouldn't work is the posix parts, like perror() and close(), and those have Windows equivalents. I'm not sure what you mean by "wouldn't work by a long shot"
perror() is just for error reporting and is an acceptable loss (but you should still detect and report errors). close() can just be replaced by closesocket().[/QUOTE]

There's also WSAStartup and WSACleanup, and the includes are different. There's more, but I can't remember right now, haven't used WinSock in a while.