BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Using Winsock 2.0          BorlandTalk.com Forum Index -> C++ Builder (Internet Socket) View previous topic :: View next topic   Author Message Eduardo Jauch Guest Posted: Wed Feb 21, 2007 9:07 pm    Post subject: Using Winsock 2.0 Hi! I'm trying to do some code for use winsock. I write this: //--------------------------------------------------------------------------- #include <stdio.h> #include <conio.h> #include <winsock2.h> #pragma argsused int main(int argc, char* argv[]) { int sockfd; sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd == INVALID_SOCKET) printf("Error: %d", WSAGetLastError()); else printf("OK"); getch(); return 0; } //--------------------------------------------------------------------------- But always get sockfd with a -1 value and the ESAGetLastError with the value 10093. Anyone could help me to solve this? Thanks Back to top PaoloItaly Guest Posted: Wed Feb 21, 2007 9:20 pm    Post subject: Re: Using Winsock 2.0 int myWSAErrorCode(int code) { switch(code) { case WSANOTINITIALISED: myMessageBox("A successful WSAStartup must occur before using this function"); break; case WSAENETDOWN: myMessageBox("The network subsystem has failed"); break; case WSAEADDRINUSE: myMessageBox("The specified address is already in use"); break; case WSAEINTR: myMessageBox("The (blocking) call was canceled through WSACancelBlockingCall"); break; case WSAEINPROGRESS: myMessageBox("A blocking Windows Sockets 1.1 call is in progress,\n or the service provider is still processing a callback function"); break; case WSAEALREADY: myMessageBox("A nonblocking connect call is in progress on the specified socket.\nNote In order to preserve backward compatibility, this error is reported as WSAEINVAL\nto Windows Sockets 1.1 applications that link to either WINSOCK.DLL or WSOCK32.DLL."); break; case WSAEADDRNOTAVAIL: myMessageBox("The specified address is not available from the local machine"); break; case WSAEAFNOSUPPORT: myMessageBox("Addresses in the specified family cannot be used with this socket"); break; case WSAECONNREFUSED: myMessageBox("The attempt to connect was forcefully rejected"); break; case WSAEFAULT: myMessageBox("The name or the namelen argument is not a valid part of\nthe user address space, the namelen argument is too small,\nor the name argument contains incorrect address format for the associated address family"); break; case WSAEINVAL: myMessageBox("The parameter s is a listening socket, or the destination address specified\nis not consistent with that of the constrained group the socket belongs to"); break; case WSAEISCONN: myMessageBox("The socket is already connected (connection-oriented sockets only)"); break; case WSAENETUNREACH: myMessageBox("The network cannot be reached from this host at this time"); break; case WSAENOBUFS: myMessageBox("No buffer space is available. The socket cannot be connected"); break; case WSAENOTSOCK: myMessageBox("The descriptor is not a socket"); break; case WSAETIMEDOUT: myMessageBox("Attempt to connect timed out without establishing a connection"); break; case WSAEWOULDBLOCK: myMessageBox("The socket is marked as nonblocking and the connection cannot be completed immediately.\nIt is possible to select the socket while it is connecting by selecting it for writing"); break; case WSAEACCES: myMessageBox("Attempt to connect datagram socket to broadcast address failed because\nsetsockopt SO_BROADCAST is not enabled"); break; default: code = 0; break; } if(code) WSASetLastError(code); return code; } SOCKET openSocket(unsigned short port, char ipAddr[], struct sockaddr_in *addr) { WORD wVersionRequested; WSADATA wsaData; SOCKET tempSock = INVALID_SOCKET; ::WSASetLastError(::WSAGetLastError()); wVersionRequested = MAKEWORD(2, 0); if(::WSAStartup(wVersionRequested, &wsaData) == 0) { tempSock = ::socket(AF_INET, SOCK_STREAM, 0); if(tempSock != INVALID_SOCKET) { addr->sin_family = AF_INET; addr->sin_port = htons(port); addr->sin_addr.s_addr = inet_addr(ipAddr); } myWSAErrorCode(::WSAGetLastError()); } return tempSock; } Back to top Eduardo Jauch Guest Posted: Wed Feb 21, 2007 9:21 pm    Post subject: Re: Using Winsock 2.0 Never mind... I found the problem... Not like in linux, on windows the socket libriry must be initialized using WSAStartup function... The help provides a good exemple :) Thanks! Back to top Eduardo Jauch Guest Posted: Wed Feb 21, 2007 9:23 pm    Post subject: Re: Using Winsock 2.0 PaoloItaly escreveu: Quote: int myWSAErrorCode(int code) { switch(code) { case WSANOTINITIALISED: myMessageBox("A successful WSAStartup must occur before using this function"); break; case WSAENETDOWN: myMessageBox("The network subsystem has failed"); break; case WSAEADDRINUSE: myMessageBox("The specified address is already in use"); break; case WSAEINTR: myMessageBox("The (blocking) call was canceled through WSACancelBlockingCall"); break; case WSAEINPROGRESS: myMessageBox("A blocking Windows Sockets 1.1 call is in progress,\n or the service provider is still processing a callback function"); break; case WSAEALREADY: myMessageBox("A nonblocking connect call is in progress on the specified socket.\nNote In order to preserve backward compatibility, this error is reported as WSAEINVAL\nto Windows Sockets 1.1 applications that link to either WINSOCK.DLL or WSOCK32.DLL."); break; case WSAEADDRNOTAVAIL: myMessageBox("The specified address is not available from the local machine"); break; case WSAEAFNOSUPPORT: myMessageBox("Addresses in the specified family cannot be used with this socket"); break; case WSAECONNREFUSED: myMessageBox("The attempt to connect was forcefully rejected"); break; case WSAEFAULT: myMessageBox("The name or the namelen argument is not a valid part of\nthe user address space, the namelen argument is too small,\nor the name argument contains incorrect address format for the associated address family"); break; case WSAEINVAL: myMessageBox("The parameter s is a listening socket, or the destination address specified\nis not consistent with that of the constrained group the socket belongs to"); break; case WSAEISCONN: myMessageBox("The socket is already connected (connection-oriented sockets only)"); break; case WSAENETUNREACH: myMessageBox("The network cannot be reached from this host at this time"); break; case WSAENOBUFS: myMessageBox("No buffer space is available. The socket cannot be connected"); break; case WSAENOTSOCK: myMessageBox("The descriptor is not a socket"); break; case WSAETIMEDOUT: myMessageBox("Attempt to connect timed out without establishing a connection"); break; case WSAEWOULDBLOCK: myMessageBox("The socket is marked as nonblocking and the connection cannot be completed immediately.\nIt is possible to select the socket while it is connecting by selecting it for writing"); break; case WSAEACCES: myMessageBox("Attempt to connect datagram socket to broadcast address failed because\nsetsockopt SO_BROADCAST is not enabled"); break; default: code = 0; break; } if(code) WSASetLastError(code); return code; } SOCKET openSocket(unsigned short port, char ipAddr[], struct sockaddr_in *addr) { WORD wVersionRequested; WSADATA wsaData; SOCKET tempSock = INVALID_SOCKET; ::WSASetLastError(::WSAGetLastError()); wVersionRequested = MAKEWORD(2, 0); if(::WSAStartup(wVersionRequested, &wsaData) == 0) { tempSock = ::socket(AF_INET, SOCK_STREAM, 0); if(tempSock != INVALID_SOCKET) { addr->sin_family = AF_INET; addr->sin_port = htons(port); addr->sin_addr.s_addr = inet_addr(ipAddr); } myWSAErrorCode(::WSAGetLastError()); } return tempSock; } HeY!!! Thanks Paolo!!! Back to top Remy Lebeau (TeamB) Guest Posted: Thu Feb 22, 2007 12:28 am    Post subject: Re: Using Winsock 2.0 "Eduardo Jauch" <eduardo.jauch (AT) gmail (DOT) com> wrote in message news:45dc601b$1 (AT) newsgroups (DOT) borland.com... Quote: int sockfd; socket() returns a SOCKET handle, not an int. Quote: sockfd = socket(AF_INET, SOCK_STREAM, 0); You did not call WSAStartup() before calling socket(). You must do so, in order to specify the version of WinSock that you want to use, and to validate that it is actually available. Quote: But always get sockfd with a -1 value and the ESAGetLastError with the value 10093. 10093 is WSANOTINITIALISED. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Thu Feb 22, 2007 12:29 am    Post subject: Re: Using Winsock 2.0 "Eduardo Jauch" <eduardo.jauch (AT) gmail (DOT) com> wrote in message news:45dc63c7$1 (AT) newsgroups (DOT) borland.com... Quote: HeY!!! Thanks Paolo!!! For future reference, please trim your replies. Do not overquote. Gambit Back to top Eduardo Jauch Guest Posted: Thu Feb 22, 2007 6:48 am    Post subject: Re: Using Winsock 2.0 Remy Lebeau (TeamB) escreveu: Quote: For future reference, please trim your replies. Do not overquote. Sorry. I'll remember that Back to top Eduardo Jauch Guest Posted: Thu Feb 22, 2007 6:49 am    Post subject: Re: Using Winsock 2.0 Remy Lebeau (TeamB) escreveu: Quote: socket() returns a SOCKET handle, not an int. Ok Quote: You did not call WSAStartup() before calling socket(). You must do so, in order to specify the version of WinSock that you want to use, and to validate that it is actually available. Yes. That was my fault. :) Quote: 10093 is WSANOTINITIALISED. 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