www.pudn.com > AVChat1.rar > UNetwork.cpp

// 
// UNetwork.cpp 
// 
 
/*-----------------------------------------------------*\ 
			HQ Tech, Make Technology Easy!        
 More information, please go to http://hqtech.nease.net. 
/*-----------------------------------------------------*/ 
 
#include "stdafx.h" 
#include "UNetwork.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
BOOL UNetwork::GetHostInfo(char * outIP, char * outName) 
{ 
	char   name[300]; 
	if (gethostname(name, 300) == 0) 
	{ 
		if (outName) 
		{ 
			strcpy(outName, name); 
		} 
 
		PHOSTENT  hostinfo; 
		if ((hostinfo = gethostbyname(name)) != NULL) 
		{ 
			LPCSTR pIP = inet_ntoa (*(struct in_addr *)*hostinfo->h_addr_list); 
			strcpy(outIP, pIP); 
			return TRUE; 
		} 
	} 
	return FALSE; 
} 
 
void UNetwork::DumpSocketError(void) 
{ 
	switch (WSAGetLastError()) 
	{ 
	case WSANOTINITIALISED: 
		TRACE("A successful WSAStartup call must occur before using this function. "); 
		break; 
	case WSAENETDOWN: 
		TRACE("The network subsystem has failed. "); 
		break; 
	case WSAEACCES: 
		TRACE("The requested address is a broadcast address, but the appropriate flag was not set. Call setsockopt with the SO_BROADCAST parameter to allow the use of the broadcast address. "); 
		break; 
	case WSAEINVAL: 
		TRACE("An unknown flag was specified, or MSG_OOB was specified for a socket with SO_OOBINLINE enabled. "); 
		break; 
	case WSAEINTR: 
		TRACE("A blocking Windows Sockets 1.1 call was canceled through WSACancelBlockingCall. "); 
		break; 
	case WSAEINPROGRESS: 
		TRACE("A blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing a callback function. "); 
		break; 
	case WSAEFAULT: 
		TRACE("The buf or to parameters are not part of the user address space, or the tolen parameter is too small. "); 
		break; 
	case WSAENETRESET: 
		TRACE("The connection has been broken due to keep-alive activity detecting a failure while the operation was in progress. "); 
		break; 
	case WSAENOBUFS: 
		TRACE("No buffer space is available. "); 
		break; 
	case WSAENOTCONN: 
		TRACE("The socket is not connected (connection-oriented sockets only). "); 
		break; 
	case WSAENOTSOCK: 
		TRACE("The descriptor is not a socket. "); 
		break; 
	case WSAEOPNOTSUPP: 
		TRACE("MSG_OOB was specified, but the socket is not stream-style such as type SOCK_STREAM, OOB data is not supported in the communication domain associated with this socket, or the socket is unidirectional and supports only receive operations. "); 
		break; 
	case WSAESHUTDOWN: 
		TRACE("The socket has been shut down; it is not possible to sendto on a socket after shutdown has been invoked with how set to SD_SEND or SD_BOTH. "); 
		break; 
	case WSAEWOULDBLOCK: 
		TRACE("The socket is marked as nonblocking and the requested operation would block. "); 
		break; 
	case WSAEMSGSIZE: 
		TRACE("The socket is message oriented, and the message is larger than the maximum supported by the underlying transport. "); 
		break; 
	case WSAEHOSTUNREACH: 
		TRACE("The remote host cannot be reached from this host at this time. "); 
		break; 
	case WSAECONNABORTED: 
		TRACE("The virtual circuit was terminated due to a time-out or other failure. The application should close the socket as it is no longer usable. "); 
		break; 
	case WSAECONNRESET: 
		TRACE("The virtual circuit was reset by the remote side executing a hard or abortive close. For UPD sockets, the remote host was unable to deliver a previously sent UDP datagram and responded with a \"Port Unreachable\" ICMP packet. The application should close the socket as it is no longer usable. "); 
		break; 
	case WSAEADDRNOTAVAIL: 
		TRACE("The remote address is not a valid address, for example, ADDR_ANY. "); 
		break; 
	case WSAEAFNOSUPPORT: 
		TRACE("Addresses in the specified family cannot be used with this socket. "); 
		break; 
	case WSAEDESTADDRREQ: 
		TRACE("A destination address is required. "); 
		break; 
	case WSAENETUNREACH: 
		TRACE("The network cannot be reached from this host at this time. "); 
		break; 
	case WSAETIMEDOUT: 
		TRACE("The connection has been dropped, because of a network failure or because the system on the other end went down without notice. "); 
		break; 
	default: 
		TRACE("Unknown socket error. "); 
		break; 
	} 
}