void initConnection(char *empfIP,char *port, char* file, int fenstergroesse){
struct request nachricht;
char* reqChar;
int retSend, reqLen,test;
unsigned long addr;
struct hostent *host_info;
WSADATA wsaData;
WORD wVersionRequested;
FILE *fp;
//komplett von http://msdn.microsoft.com/de-de/library/windows/desktop/ms738630(v=vs.85).aspx übernommen
int RetVal,testi,AddrLen;
ADDRINFO Hints, *AddrInfo;
char AddrName[NI_MAXHOST];
struct sockaddr_storage Addr;
//komplett von http://msdn.microsoft.com/de-de/library/windows/desktop/ms738630(v=vs.85).aspx übernommen
wVersionRequested = MAKEWORD(2,1);
if( WSAStartup( wVersionRequested,&wsaData ) == SOCKET_ERROR ){
printf( "Error: WSAStartup() throws error nr. %d!\n" ,WSAGetLastError());
exit(-1);
}
//komplett von http://msdn.microsoft.com/de-de/library/windows/desktop/ms738630(v=vs.85).aspx übernommen
memset(&Hints, 0, sizeof (Hints));
Hints.ai_family = AF_INET6;
Hints.ai_socktype = SOCK_DGRAM;
RetVal = getaddrinfo(empfIP, port, &Hints, &AddrInfo);
if (RetVal != 0) {
fprintf(stderr,
"Cannot resolve address [%s] and port [%s], error %d: %s\n",
empfIP, port, RetVal, gai_strerror(RetVal));
WSACleanup();
exit(-1);
}
//
// Try each address getaddrinfo returned, until we find one to which
// we can successfully connect.
//
for (AI = AddrInfo; AI != NULL; AI = AI->ai_next) {
// Open a socket with the correct address family for this address.
ConnSocket = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol);
printf("socket call with family: %d socktype: %d, protocol: %d\n",
AI->ai_family, AI->ai_socktype, AI->ai_protocol);
if (ConnSocket == INVALID_SOCKET)
printf("socket call failed with %d\n", WSAGetLastError());
if (ConnSocket == INVALID_SOCKET) {
fprintf(stderr, "Error Opening socket, error %d\n",
WSAGetLastError());
continue;
}
printf("Attempting to connect to: %s\n", empfIP ? empfIP : "localhost");
if (connect(ConnSocket, AI->ai_addr, (int) AI->ai_addrlen) != SOCKET_ERROR)
break;
testi = WSAGetLastError();
if (getnameinfo(AI->ai_addr, (int) AI->ai_addrlen, AddrName,
sizeof (AddrName), NULL, 0, NI_NUMERICHOST) != 0)
strcpy_s(AddrName, sizeof (AddrName), UNKNOWN_NAME);
fprintf(stderr, "connect() to %s failed with error %d\n",
AddrName, testi);
closesocket(ConnSocket);
}
if (AI == NULL) {
fprintf(stderr, "Fatal error: unable to connect to the server.\n");
WSACleanup();
exit(-1);
}
AddrLen = sizeof (Addr);
if (getpeername(ConnSocket, (LPSOCKADDR) & Addr, (int *) &AddrLen) == SOCKET_ERROR) {
fprintf(stderr, "getpeername() failed with error %d\n",
WSAGetLastError());
} else {
if (getnameinfo((LPSOCKADDR) & Addr, AddrLen, AddrName,
sizeof (AddrName), NULL, 0, NI_NUMERICHOST) != 0)
strcpy_s(AddrName, sizeof (AddrName), UNKNOWN_NAME);
printf("Connected to %s, port %d, protocol %s, protocol family %s\n",
AddrName, ntohs(SS_PORT(&Addr)),
(AI->ai_socktype == SOCK_STREAM) ? "TCP" : "UDP",
(AI->ai_family == PF_INET) ? "PF_INET" : "PF_INET6");
}
//komplett von http://msdn.microsoft.com/de-de/library/windows/desktop/ms738630(v=vs.85).aspx übernommen
//schicke erste nachricht
nachricht.FlNr = (long) fenstergroesse; //fenstergröße
if(file != NULL) memcpy(nachricht.fname,file,sizeof(nachricht.fname));//dateiname
nachricht.fname[strlen(file)] = '\0';
nachricht.ReqType = ReqHello;//nachrichtentyp
nachricht.name[0] = '\0';
fp = openFile(file);
nachricht.SeNr = getFileSize();//größe der datei
closeFile(fp);
//umwandeln des struct request in char*
reqChar = (char*) malloc(sizeof(nachricht));
memcpy(reqChar,&nachricht,sizeof(nachricht));
sizeof(nachricht);
UserInformation(2,&nachricht,NULL);
//senden der ersten nachricht
retSend = sendto(ConnSocket,reqChar,sizeof(nachricht),0,AI->ai_addr, (int) AI->ai_addrlen);
//auswerten des returnwertes von send
if(retSend != sizeof(nachricht)){
printf("Error: Es wurden nicht alle Daten versand!");
}
}
int __cdecl main()
{
WSADATA wsd;
INT nStartup = 0, nErr = 0, ret = 0;
SOCKET lsock = INVALID_SOCKET, asock = INVALID_SOCKET;
SOCKADDR_STORAGE addr = {0};
WSAPOLLFD fdarray = {0};
ULONG uNonBlockingMode = 1;
CHAR buf[MAX_PATH] = {0};
HANDLE hThread = NULL;
DWORD dwThreadId = 0;
nErr = WSAStartup(WS_VER,&wsd);
if (nErr) {
WSASetLastError(nErr);
ERR("WSAStartup");
exit(0);
} else {
nStartup++;
}
if (NULL == (hCloseSignal = CreateEvent(NULL, TRUE, FALSE, NULL))) {
ERR("CreateEvent");
exit(0);
}
/*
if (NULL == (hThread = CreateThread(NULL, 0, ConnectThread, NULL, 0, &dwThreadId))) {
ERR("CreateThread");
//exit__leave;
}
*/
addr.ss_family = AF_INET;
INETADDR_SETANY((SOCKADDR*)&addr);
SS_PORT((SOCKADDR*)&addr) = htons(DEFAULT_PORT);
if (INVALID_SOCKET == (lsock = socket(AF_INET, SOCK_STREAM, 0))) {
ERR("socket");
exit(0);
}
/*
if (SOCKET_ERROR == ioctlsocket(lsock, FIONBIO, &uNonBlockingMode)) {
ERR("FIONBIO");
exit(0);
}
*/
if (SOCKET_ERROR == bind(lsock, (SOCKADDR*)&addr, sizeof (addr))) {
ERR("bind");
exit(0);
}
if (SOCKET_ERROR == listen(lsock, 100)) {
ERR("listen");
exit(0);
}
//Call WSAPoll for readability of listener (accepted)
//fdarray.fd = lsock;
//fdarray.events = POLLRDNORM | POLLWRNORM;
/*
if (SOCKET_ERROR == (ret = WSAPoll(&fdarray, 1, DEFAULT_WAIT))) {
ERR("WSAPoll");
exit(0);
}
*/
while (1) {
//if (ret) {
//if ((fdarray.revents & POLLRDNORM) || (fdarray.revents & POLLWRNORM)) {
// printf("Main: Connection established.\n");
if (INVALID_SOCKET == (asock = accept(lsock, NULL, NULL))) {
ERR("accept");
//__leave;
}
/*
if (SOCKET_ERROR == (ret = recv(asock, buf, sizeof(buf), 0))) {
ERR("recv");
} else {
printf("Main: recvd %d bytes\n",ret);
}
*/
//}
//}
//Call WSAPoll for writeability of accepted
fdarray.fd = asock;
fdarray.events = POLLWRNORM;
if (SOCKET_ERROR == (ret = WSAPoll(&fdarray, 1, DEFAULT_WAIT))) {
ERR("WSAPoll");
// exit
}
if (ret) {
if (fdarray.revents & POLLWRNORM) {
if (SOCKET_ERROR == (ret = send(asock, TST_MSG, sizeof(TST_MSG), 0))) {
ERR("send");
// exit
} else {
printf("Main: sent %d bytes\n",ret);
closesocket(asock);
}
}
}
}
//SetEvent(hCloseSignal);
//WaitForSingleObject(hThread,DEFAULT_WAIT);
/* clean up before exit */
CloseHandle(hCloseSignal);
CloseHandle(hThread);
CLOSESOCK(asock);
CLOSESOCK(lsock);
if (nStartup) {
WSACleanup();
}
return 0;
}
