#include <stdio.h>
#include <winsock2.h>
#include <iostream.h>
int main(int argc, char* argv[])
{
cout <<"The Nonamed Game Server Version 0.1a\nBy:Matthew Shapiro\n\n";
unsigned long ul=1;
sockaddr_in me;
WSADATA wsaData;
SOCKET s;
const int max_length=25;
char namebuf[max_length];
char passbuf[max_length];
char username;
char password;
int error = 0;
int nRet;
if(error = WSAStartup(MAKEWORD(2,0), &wsaData))
{
switch(error)
{
case WSASYSNOTREADY:
printf("WSASYSNOTREADY\n");
case WSAVERNOTSUPPORTED:
printf("WSAVERNOTSUPPORTED\n");
case WSAEINPROGRESS:
printf("WSAEINPROGRESS\n");
case WSAEPROCLIM:
printf("WSAEPROCLIM\n");
case WSAEFAULT:
printf("WSAEFAULT\n");
}; return 1;
}
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s == INVALID_SOCKET)
{
printf("socket() failed; %d\n", WSAGetLastError());
return 1;
}
nRet = ioctlsocket(s,FIONBIO, (unsigned long *) &ul);
if (nRet == SOCKET_ERROR)
{
cout <<"failed to put socket into nonblocking mode: "<<WSAGetLastError<<''\n'';
return 1;
}
me.sin_family = AF_INET;
me.sin_port = htons(5151);
me.sin_addr.s_addr = htonl(INADDR_ANY);
cout <<"Testing\n";
if (bind(s, (SOCKADDR *)&me, sizeof(me)) == SOCKET_ERROR)
{
cout <<"bind() failed: ";WSAGetLastError();
return 1;
}
int err = recv(s,namebuf,25,0);
if (err==0 || err==INVALID_SOCKET)
{
cout <<"Couldn''t recieve username: "<<WSAGetLastError()<<''\n'';
return 1;
}
username;
err = recv(s,passbuf,25,0);
if (err==0 || err==INVALID_SOCKET)
{
cout <<"Couldn''t recieve password: "<<WSAGetLastError()<<''\n'';
return 1;
}
cout <<"everything works right now\n";
password;
return 1;
}
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Problem with using non-blocking mode!
Author
LOok at my code. When i compile it and it does the recieve command i get the error: INVALID_SOCKET! any ideas?
with nonblocking sockets, be sure to check for a WSAEWOULDBLOCK return value.
int main(int argc, char* argv[]){ cout <<"The Nonamed Game Server Version 0.1a\nBy:Matthew Shapiro\n\n"; unsigned long ul=1; sockaddr_in me; WSADATA wsaData; SOCKET s; const int max_length=25; char namebuf[max_length]; char passbuf[max_length]; int error = 0; int nRet; if(error = WSAStartup(MAKEWORD(2,0), &wsaData)){ switch(error) { case WSASYSNOTREADY: printf("WSASYSNOTREADY\n"); case WSAVERNOTSUPPORTED: printf("WSAVERNOTSUPPORTED\n"); case WSAEINPROGRESS: printf("WSAEINPROGRESS\n"); case WSAEPROCLIM: printf("WSAEPROCLIM\n"); case WSAEFAULT: printf("WSAEFAULT\n"); }; return 1; } s = socket(AF_INET, SOCK_DGRAM, 0); if (s == INVALID_SOCKET){ TCHAR szErr[MAX_PATH]; FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, WSAGetLastError(), 0, szErr, MAX_PATH, NULL); printf("socket() failed: %d\n", szErr); return 1; } nRet = ioctlsocket(s,FIONBIO, (unsigned long *) &ul); if (nRet == SOCKET_ERROR){ TCHAR szErr[MAX_PATH]; FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, WSAGetLastError(), 0, szErr, MAX_PATH, NULL); cout << "failed to put socket into nonblocking mode: " << szErr << ''\n''; return 1; } me.sin_family = AF_INET; me.sin_port = htons(5151); me.sin_addr.s_addr = htonl(INADDR_ANY); cout <<"Testing\n"; if (bind(s, (SOCKADDR *)&me, sizeof(me)) != 0){ TCHAR szErr[MAX_PATH]; FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, WSAGetLastError(), 0, szErr, MAX_PATH, NULL); cout << "bind() failed: " << szErr << ''\n''; return 1; } int err = recv(s,namebuf,25,0); if(err == 0){ cout << "Socket closed\n"; return 1; } if( err == SOCKET_ERROR){ DWORD dwErr = WSAGetLastError(); if(dwErr != WSAEWOULDBLOCK) { TCHAR szErr[MAX_PATH]; FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, dwErr, 0, szErr, MAX_PATH, NULL); cout << "Couldn''t recieve username: " << szErr << ''\n''; return 1; } } err = recv(s,passbuf,25,0); if(err == 0){ cout << "Socket closed\n"; return 1; } if(err == SOCKET_ERROR){ DWORD dwErr = WSAGetLastError(); if(dwErr != WSAEWOULDBLOCK) { TCHAR szErr[MAX_PATH]; FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, dwErr, 0, szErr, MAX_PATH, NULL); cout << "Couldn''t recieve password: " << szErr << ''\n''; return 1; } } cout <<"everything works right now\n"; return 1;} This topic is closed to new replies.
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