我写了一个服务器/客户端C++代码并在Visual Studio中测试,它没关系,但我想转换为CodeBlocks MinGW(Gnu CC编译器),它返回一些错误,如:
警告:忽略#pragma comment [-Wunknown-pragmas]
错误: 'getaddrinfo'未在此范围中声明|
错误: 'freeaddrinfo'未在此范围中声明|
我的服务器代码:
#undef UNICODE #define WIN32_LEAN_AND_MEAN #include#include #include #include #include #pragma comment (lib, "Ws2_32.lib") #define DEFAULT_BUFLEN 512 #define DEFAULT_PORT "27015" int __cdecl main(void) { WSADATA wsaData; int iResult; SOCKET ListenSocket = INVALID_SOCKET; SOCKET ClientSocket = INVALID_SOCKET; struct addrinfo *result = NULL; struct addrinfo hints; int iSendResult; char recvbuf[DEFAULT_BUFLEN]; int recvbuflen = DEFAULT_BUFLEN; iResult = WSAStartup(MAKEWORD(2,2), &wsaData); if (iResult != 0) { printf("WSAStartup failed with error: %d\n", iResult); return 1; } ZeroMemory(&hints, sizeof(hints)); hints.ai_family = AF_INET; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; hints.ai_flags = AI_PASSIVE; iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result); if ( iResult != 0 ) { printf("getaddrinfo failed with error: %d\n", iResult); WSACleanup(); return 1; } ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol); if (ListenSocket == INVALID_SOCKET) { printf("socket failed with error: %i\n", WSAGetLastError()); freeaddrinfo(result); WSACleanup(); return 1; } iResult = bind( ListenSocket, result->ai_addr, (int)result->ai_addrlen); if (iResult == SOCKET_ERROR) { printf("bind failed with error: %d\n", WSAGetLastError()); freeaddrinfo(result); closesocket(ListenSocket); WSACleanup(); return 1; } freeaddrinfo(result); iResult = listen(ListenSocket, SOMAXCONN); if (iResult == SOCKET_ERROR) { printf("listen failed with error: %d\n", WSAGetLastError()); closesocket(ListenSocket); WSACleanup(); return 1; } ClientSocket = accept(ListenSocket, NULL, NULL); if (ClientSocket == INVALID_SOCKET) { printf("accept failed with error: %d\n", WSAGetLastError()); closesocket(ListenSocket); WSACleanup(); return 1; } closesocket(ListenSocket); do { iResult = recv(ClientSocket, recvbuf, recvbuflen, 0); if (iResult > 0) { printf("Bytes received: %d\n", iResult); iSendResult = send( ClientSocket, recvbuf, iResult, 0 ); if (iSendResult == SOCKET_ERROR) { printf("send failed with error: %d\n", WSAGetLastError()); closesocket(ClientSocket); WSACleanup(); return 1; } printf("Bytes sent: %d\n", iSendResult); } else if (iResult == 0) printf("Connection closing...\n"); else { printf("recv failed with error: %d\n", WSAGetLastError()); closesocket(ClientSocket); WSACleanup(); return 1; } } while (iResult > 0); iResult = shutdown(ClientSocket, SD_SEND); if (iResult == SOCKET_ERROR) { printf("shutdown failed with error: %d\n", WSAGetLastError()); closesocket(ClientSocket); WSACleanup(); return 1; } closesocket(ClientSocket); WSACleanup(); return 0; }
我的客户代码:
#define WIN32_LEAN_AND_MEAN #include#include #include #include #include #pragma comment (lib, "Ws2_32.lib") #pragma comment (lib, "Mswsock.lib") #pragma comment (lib, "AdvApi32.lib") #define DEFAULT_BUFLEN 512 #define DEFAULT_PORT "27015" int __cdecl main(int argc, char **argv) { WSADATA wsaData; SOCKET ConnectSocket = INVALID_SOCKET; struct addrinfo *result = NULL, *ptr = NULL, hints; char *sendbuf = "this is a test"; char recvbuf[DEFAULT_BUFLEN]; int iResult; int recvbuflen = DEFAULT_BUFLEN; if (argc != 2) { printf("usage: %s server-name\n", argv[0]); return 1; } iResult = WSAStartup(MAKEWORD(2,2), &wsaData); if (iResult != 0) { printf("WSAStartup failed with error: %d\n", iResult); return 1; } ZeroMemory( &hints, sizeof(hints) ); hints.ai_family = AF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; iResult = getaddrinfo(argv[1], DEFAULT_PORT, &hints, &result); if ( iResult != 0 ) { printf("getaddrinfo failed with error: %d\n", iResult); WSACleanup(); return 1; } for(ptr=result; ptr != NULL ;ptr=ptr->ai_next) { ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol); if (ConnectSocket == INVALID_SOCKET) { printf("socket failed with error: %ld\n", WSAGetLastError()); WSACleanup(); return 1; } iResult = connect( ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen); if (iResult == SOCKET_ERROR) { closesocket(ConnectSocket); ConnectSocket = INVALID_SOCKET; continue; } break; } freeaddrinfo(result); if (ConnectSocket == INVALID_SOCKET) { printf("Unable to connect to server!\n"); WSACleanup(); return 1; } iResult = send( ConnectSocket, sendbuf, (int)strlen(sendbuf), 0 ); if (iResult == SOCKET_ERROR) { printf("send failed with error: %d\n", WSAGetLastError()); closesocket(ConnectSocket); WSACleanup(); return 1; } printf("Bytes Sent: %i\n", iResult); iResult = shutdown(ConnectSocket, SD_SEND); if (iResult == SOCKET_ERROR) { printf("shutdown failed with error: %d\n", WSAGetLastError()); closesocket(ConnectSocket); WSACleanup(); return 1; } do { iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0); if ( iResult > 0 ) printf("Bytes received: %d\n", iResult); else if ( iResult == 0 ) printf("Connection closed\n"); else printf("recv failed with error: %d\n", WSAGetLastError()); } while( iResult > 0 ); closesocket(ConnectSocket); WSACleanup(); return 0; }
谁能帮我?
插入#define _WIN32_WINNT 0x501
文件顶部(包含之前).
这是你的问题的原因(ws2tcpip.h
):
#if (_WIN32_WINNT >= 0x0501) void WSAAPI freeaddrinfo (struct addrinfo*); int WSAAPI getaddrinfo (const char*,const char*,const struct addrinfo*, struct addrinfo**); int WSAAPI getnameinfo(const struct sockaddr*,socklen_t,char*,DWORD, char*,DWORD,int); #else /* FIXME: Need WS protocol-independent API helpers. */ #endif
这些函数的原型仅在_WIN32_WINNT
定义为0x051或更高时才可用.