winsock服务器不接受连接

Question

我有一个简单的TCP服务器应用程序，不接受任何连接。它目前是使用VS2019构建的，但最初(一段时间之前)是使用VS2012构建的。原始版本可以工作，但2019版本永远不会接受。我可以调查哪些领域？我没有访问客户端代码的权限。这是我的服务器代码

  int iResult;
   WSADATA wsaData;
   // Initialize Winsock
   iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
   if (iResult != 0) {
      printf("WSAStartup failed: %d\n", iResult);
      return 1;
   }
#define DEFAULT_PORT "8082"

   struct addrinfo* result = NULL, * ptr = NULL, hints;

   ZeroMemory(&hints, sizeof(hints));
   hints.ai_family = AF_INET;
   hints.ai_socktype = SOCK_STREAM;
   hints.ai_protocol = IPPROTO_TCP;
   hints.ai_flags = AI_PASSIVE;

   // Resolve the local address and port to be used by the server
   iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
   if (iResult != 0) {
      printf("getaddrinfo failed: %d\n", iResult);
      WSACleanup();
      return 1;
   }

   SOCKET ListenSocket = INVALID_SOCKET;

   ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);

   if (ListenSocket == INVALID_SOCKET) {
      printf("Error at socket(): %ld\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;
   }
   printf("bound\n");
   if (listen(ListenSocket, SOMAXCONN) == SOCKET_ERROR) {
      printf("Listen failed with error: %ld\n", WSAGetLastError());
      closesocket(ListenSocket);
      WSACleanup();
      return 1;
   }

   SOCKET ClientSocket;

   ClientSocket = INVALID_SOCKET;

   // Accept a client socket
   ClientSocket = accept(ListenSocket, NULL, NULL);
   if (ClientSocket == INVALID_SOCKET) {
      printf("accept failed: %d\n", WSAGetLastError());
      closesocket(ListenSocket);
      WSACleanup();
      return 1;
   }

   printf("connected\n");

这是wireshark的输出

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这是来自netsat的

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Answer 1

发现问题是防火墙停止了连接请求