What is WSAConnect?
The WSAConnect function is used to create a connection to the specified destination, and to perform a number of other ancillary operations that occur at connect time. If the socket, s, is unbound, unique values are assigned to the local association by the system, and the socket is marked as bound.
What is WSAStartup?
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 does this Gethostbyname () function do?
The gethostbyname() function is an inbuilt function in PHP which returns IPv4 address for a specified host/domain name. Parameter: This function accepts single parameter $hostname which is required. It specifies the hostname whose IPv4 address to be found.
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 Makeword?
Roughly speaking, MAKEWORD(x,y) is equivalent to ((y) << 8 | (x)) ; this is useful when packing two byte-sized values into a single 16-bit field, as often happens with general-purpose message structures.
What is Berkeley sockets in computer networks?
Berkeley sockets is an application programming interface (API) for Internet sockets and Unix domain sockets, used for inter-process communication (IPC). It is commonly implemented as a library of linkable modules. A socket is an abstract representation (handle) for the local endpoint of a network communication path.
Does Gethostbyname use DNS?
The GetHostByName method queries the Internet DNS server for host information. If you pass an empty string as the host name, this method retrieves the standard host name for the local computer.
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.
What is Makeword C++?
How is the wsaconnectbyname function used in Win32?
The WSAConnectByName function simplifies connecting to an endpoint using a stream-based socket given the destination’s hostname or IP address (IPv4 or IPv6). This function reduces the source code required to create an IP application that is agnostic to the version of the IP protocol used.
Why is the remote address not valid for wsaconnect?
A nonblocking connect or WSAConnect call is in progress on the specified socket. The remote address is not a valid address (such as ADDR_ANY). Addresses in the specified family cannot be used with this socket. The attempt to connect was rejected.
How can I change the default destination of wsaconnect?
The default destination can be changed by simply calling WSAConnect again, even if the socket is already connected. Any datagrams queued for receipt are discarded if name is different from the previous WSAConnect. For connectionless sockets, name can indicate any valid address, including a broadcast address.
What happens if I call wsaconnect on a nonblocking socket?
For a nonblocking socket, until the connection attempt completes all subsequent calls to WSAConnect on the same socket will fail with the error code WSAEALREADY. If the return error code indicates the connection attempt failed (that is, WSAECONNREFUSED, WSAENETUNREACH, WSAETIMEDOUT) the application can call WSAConnect again for the same socket.