What is Wsadata?

What is Wsadata?

The WSADATA structure contains information about the Windows Sockets implementation. The MAKEWORD(2,2) parameter of WSAStartup makes a request for version 2.2 of Winsock on the system, and sets the passed version as the highest version of Windows Sockets support that the caller can use.

What is WSA startup?

The WSAStartup function must be the first Windows Sockets function called by an application or DLL. It allows an application or DLL to specify the version of Windows Sockets required and retrieve details of the specific Windows Sockets implementation.

What is WSACleanup?

In a multithreaded environment, WSACleanup terminates Windows Sockets operations for all threads. A successful WSAStartup call must occur before using this function. The network subsystem has failed. A blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing a callback function.

What is Winsock H?

Note This function is a Microsoft-specific extension to the Windows Sockets specification. . The closesocket function closes an existing socket. FD_SET. Fd_set structure is used by Windows Sockets (Winsock) functions and service providers to place sockets into a set.

What is Wsadata C++?

WSADATA structure is version 2.2 encoded with the major version number in the low-byte and the minor version number in the high-byte. This version of the current Winsock DLL, Ws2_32. dll, supports applications that request any of the following versions of the Windows Sockets specification: 1.0.

Does Winsock work on Linux?

Linux doesn’t have winsock2. h, or winsock at all for that matter. It’s called Winsock because of Win for Windows, and sock for sockets.

How do I run a client server program in Windows?

To execute the server, compile the complete server source code and run the executable file. The server application listens on TCP port 27015 for a client to connect. Once a client connects, the server receives data from the client and echoes (sends) the data received back to the client.

Should I call WSACleanup?

There must be a call to WSACleanup for each successful call to WSAStartup. Only the final WSACleanup function call performs the actual cleanup. As a result, the WSACleanup function should not be called from the DllMain function in a application DLL.

Where is winsock2h?

Upon inspecting the Windows 10 SDK, winsock2. h is located within the include/um folder.

What is wsock32 lib?

wsock32. lib and w2_32. lib contain a list of the exported functions and data elements from the dynamic link libraries. Note: some of the differences between wsock32 and ws_32 may be unexpected. For example wsock32 will run winsock version 2.2 API — but to get version 2.0 you need w2_32.

How do I create a socket program in Windows?

Winsock tutorial – Socket programming in C on windows

1. Socket programming with winsock. This is a quick guide/tutorial to learning socket programming in C language on Windows.
2. Before you begin.
3. Initialising Winsock.
4. Creating a socket.
5. Connect to a Server.
6. Sending Data.
7. Receiving Data.
8. Close socket.

Can I use Windows h in Linux?

There’s no “equivalent”, so to speak, for windows. h in Linux, you need to fix your errors case by case, or better, rewrite your code for linux (if it’s not too complicated). Having windows. h means that your application uses the API of the Windows operating system, there is no 1-to-1 mapping to libraries on Linux.

What is wsadata in DLL?

The WSADATA structure contains information about the Windows Sockets implementation. The version of the Windows Sockets specification that the Ws2_32.dll expects the caller to use. The high-order byte specifies the minor version number; the low-order byte specifies the major version number.

How do I find the current version of the wsadata structure?

The WSAStartup function returns a pointer to the WSADATA structure in the lpWSAData parameter. The current version of the Windows Sockets specification returned in the wHighVersion member of the WSADATA structure is version 2.2 encoded with the major version number in the low-byte and the minor version number in the high-byte.

What is the wsadata structure in wsastartup function?

The WSAStartup function returns a pointer to the WSADATA structure in the lpWSAData parameter. WSADATA structure is version 2.2 encoded with the major version number in the low-byte and the minor version number in the high-byte.

What is wversionrequested in wsastartup?

This is the same value as the wVersion member when the version requested in the wVersionRequested parameter passed to the WSAStartup function is the highest version of the Windows Sockets specification that the Ws2_32.dll can support. The maximum number of sockets that may be opened.