echo server

Does anyone have a source for a simple echo server?

I'm trying to learn to use windows sockets.
I've followed some tuts but some don't compile and others just do not work.

http://www.hal-pc.org/~johnnie2/winsock.html
I can get that to compile and link w/o problems but when i try to send() or recv() i start getting errors

>>when i try to send() or recv() i start getting errors
Post a snippet of your code where you think the problem is, along with the error messages, and someone will help you.

I took this stright out of the link above.
also added a bit more output.

Code:

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#include <winsock.h>                // winsock.h always needs to be included
#include <stdio.h>

#define MY_PORT 10000
#define MY_CONNECTIONS 5

int main(int argc, char** argv) {
        WORD version = MAKEWORD(1,1);
        WSADATA wsaData;
        int nRet;


        //
        // First, we start up Winsock
        //
        WSAStartup(version, &wsaData);


        //
        // Next, create the socket itself
        //
        SOCKET listeningSocket;

        listeningSocket = socket(AF_INET,                // Go over TCP/IP
                                                SOCK_STREAM,                // Socket type
                                                IPPROTO_TCP);                // Protocol
        if (listeningSocket == INVALID_SOCKET) {
                printf("Error at socket()");
                WSACleanup();
                return 0;
        }
       
        printf("Socket created\n");
       
        //
        // Use SOCKADDR_IN to fill in address information
        //
        SOCKADDR_IN saServer;
       
        saServer.sin_family = AF_INET;
        saServer.sin_addr.s_addr = INADDR_ANY;                // Since this is a server, any address will do
        saServer.sin_port = htons(MY_PORT);                        // Convert int 8888 to a value for the port field
       
        printf("Port: %i\n", MY_PORT);

        //
        // Bind the socket to our local server address
        //
        nRet = bind(listeningSocket, (LPSOCKADDR)&saServer, sizeof(struct sockaddr));
        if (nRet == SOCKET_ERROR) {
                printf("Error at bind()");
                WSACleanup();
                return 0;
        }


        //
        // Make the socket listen
        //
        printf("Setting socket to lissen\n");
       
        nRet = listen(listeningSocket, MY_CONNECTIONS);                // 10 is the number of clients that can be queued
        if (nRet == SOCKET_ERROR) {
                printf("Error at listen()");
                WSACleanup();
                return 0;
        }
       
       
        //
        // Wait for a client
        //
        SOCKET theClient;

        printf("Waiting for connections....\nWARNING: Program has been haulted while it waits for connections\n");
       
        theClient = accept(listeningSocket,
                          NULL,                        // Address of a sockaddr structure (see below)
                          NULL);                        // Address of a variable containing the size of sockaddr
        if (theClient == INVALID_SOCKET) {
                printf("Error at accept()");
                WSACleanup();
                return 0;
        }


        // Send/receive from the client, and finally:
       
        char myBuf[256];

        nRet = recv(listeningSocket,                // Connected socket
                            myBuf,                // Receive buffer
                            sizeof(myBuf),        // Size of the buffer
                            0);                        // More flags
        if (nRet == SOCKET_ERROR) {
                printf("Error on recv()\n");
                //return 0;
        }
       

        strcpy(myBuf, "The middle kid is always screwed up.");
       
        nRet = send(listeningSocket,                // Pretend this is connected
                                myBuf,                                // Our string buffer
                                strlen(myBuf),                // Length of the data in the buffer
                                0);                                        // Most often is 0, but see end of tutorial for options
       
        if (nRet == SOCKET_ERROR) {
                printf("Error on send()\n");
                //return 0;
        }

        printf("Socket clean up\n");
        closesocket(theClient);
        closesocket(listeningSocket);


        //
        // Shutdown Winsock
        //
        WSACleanup();
       
        printf("Returning from main\nProgram ends here\n");
        return 0;
}

---

Code:

---

output:
Socket created
Port: 10000
Setting socket to lissen
Waiting for connections....
WARNING: Program has been haulted while it waits for connections
Error on recv()
Error on send()
Socket clean up
Returning from main
Program ends here
Press any key to continue

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Simple problem... :)

You're recv()'ing and send()'ing on the wrong socket. You are using the listener, when you should be using the newly created client socket as returned by accept().

opps.
thx

**turns red**