winsock

[pode]

hi i found this code at
Johnnies winsock tutorial (http://www.hal-pc.org/~johnnie2/winsock.html)







#pragma comment (lib,"wsock32.lib")
#include <windows.h>
#include <winsock.h>
#include <stdio.h>

#define NETWORK_ERROR -1
#define NETWORK_OK 0

void ReportError(int, const char *);


int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmd, int nShow) {
WORD sockVersion;
WSADATA wsaData;
int nret;

sockVersion = MAKEWORD(1, 1); // We'd like Winsock version 1.1


// We begin by initializing Winsock
WSAStartup(sockVersion, &wsaData);


// Next, create the listening socket
SOCKET listeningSocket;

listeningSocket = socket(AF_INET, // Go over TCP/IP
SOCK_STREAM, // This is a stream-oriented socket
IPPROTO_TCP); // Use TCP rather than UDP

if (listeningSocket == INVALID_SOCKET) {
nret = WSAGetLastError(); // Get a more detailed error
ReportError(nret, "socket()"); // Report the error with our custom function

WSACleanup(); // Shutdown Winsock
return NETWORK_ERROR; // Return an error value
}


// Use a SOCKADDR_IN struct to fill in address information
SOCKADDR_IN serverInfo;

serverInfo.sin_family = AF_INET;
serverInfo.sin_addr.s_addr = INADDR_ANY;
// = inet_addr("192.168.0.118");
// Since this socket is listening for connections,
// any local address will do
serverInfo.sin_port = htons(888); // Convert integer 8888 to network-byte order
// and insert into the port field


// Bind the socket to our local server address
nret = bind(listeningSocket, (LPSOCKADDR)&serverInfo, sizeof(struct sockaddr_in));

if (nret == SOCKET_ERROR) {
nret = WSAGetLastError();
ReportError(nret, "bind()");

WSACleanup();
return NETWORK_ERROR;
}


// Make the socket listen
nret = listen(listeningSocket, 10); // Up to 10 connections may wait at any
// one time to be accept()'ed

if (nret == SOCKET_ERROR) {
nret = WSAGetLastError();
ReportError(nret, "listen()");

WSACleanup();
return NETWORK_ERROR;
}


// Wait for a client
SOCKET theClient;

theClient = accept(listeningSocket,
NULL, // Address of a sockaddr structure (see explanation below)
NULL); // Address of a variable containing size of sockaddr struct

if (theClient == INVALID_SOCKET) {
nret = WSAGetLastError();
ReportError(nret, "accept()");

WSACleanup();
return NETWORK_ERROR;
}


// Send and receive from the client, and finally,
closesocket(theClient);
closesocket(listeningSocket);


// Shutdown Winsock
WSACleanup();
return NETWORK_OK;
}


void ReportError(int errorCode, const char *whichFunc) {
char errorMsg[92]; // Declare a buffer to hold
// the generated error message

ZeroMemory(errorMsg, 92); // Automatically NULL-terminate the string

// The following line copies the phrase, whichFunc string, and integer errorCode into the buffer
sprintf(errorMsg, "Call to %s returned error %d!", (char *)whichFunc, errorCode);

MessageBox(NULL, errorMsg, "socketIndication", MB_OK);
}






i get an error that says call to bind() returned error 1048
1048 is the error# that u can find



here (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/windows_sockets_error_codes_2.asp)

can anyone see whats wrong?

btw what i would want to do is an app that sends a text message when u connect to it

[pode]

hey what's happend to the edit button?:confused:

the erro is 10048 not 1048 sorry

[stovellp]

What part of it dont you understand?

Address already in use.
Typically, only one usage of each socket address (protocol/IP address/port) is permitted. This error occurs if an application attempts to bind a socket to an IP address/port that has already been used for an existing socket, or a socket that was not closed properly, or one that is still in the process of closing. For server applications that need to bind multiple sockets to the same port number, consider using setsockopt (SO_REUSEADDR). Client applications usually need not call bind at all—connect chooses an unused port automatically. When bind is called with a wildcard address (involving ADDR_ANY), a WSAEADDRINUSE error could be delayed until the specific address is committed. This could happen with a call to another function later, including connect, listen, WSAConnect, or WSAJoinLeaf.

It obviously (from the first 2 lines) means the port is probably already doing something. Check you dont already have anything listening on port 888, and that you don't have a firewall or anything stopping applications on that port (or try a port above 1024, like 8090).

And as to your BTW question, try using the send() or WSASend() function.