The following list provides concise descriptions of each Winsock function. For additional information on any function, click the function name.
| Function | Description |
|---|
| accept | Permits an incoming connection attempt on a socket. |
| AcceptEx | Accepts a new connection, returns the local and remote address, and receives the first block of data sent by the client application. |
| bind | Associates a local address with a socket. |
| closesocket | Closes an existing socket. |
| connect | Establishes a connection to a specified socket. |
| ConnectEx | Establishes a connection to a specified socket, and optionally sends data once the connection is established. Only supported on connection-oriented sockets. |
| DisconnectEx | Closes a connection on a socket, and allows the socket handle to be reused. |
| EnumProtocols | Retrieves information about a specified set of network protocols that are active on a local host. |
| freeaddrinfo | Frees address information that the
getaddrinfo function dynamically allocates in addrinfo
structures. |
| FreeAddrInfoEx | Frees address information that the
GetAddrInfoEx function dynamically allocates in addrinfoex structures. |
| FreeAddrInfoW | Frees address information that the
GetAddrInfoW function dynamically allocates in addrinfoW structures. |
| gai_strerror | Assists in printing error messages based on the EAI_* errors returned by the
getaddrinfo function. |
| GetAcceptExSockaddrs | Parses the data obtained from a call to the
AcceptEx function. |
| GetAddressByName | Queries a namespace, or a set of default namespaces, to retrieve network address information for a specified network service. This process is known as service name resolution. A network service can also use the function to obtain local address information that it can use with the bind function. |
| getaddrinfo | Provides protocol-independent translation from an ANSI host name to an address. |
| GetAddrInfoEx | Provides protocol-independent name resolution with additional parameters to qualify which name space providers should handle the request. |
| GetAddrInfoW | Provides protocol-independent translation from a Unicode host name to an address. |
| gethostbyaddr | Retrieves the host information corresponding to a network address. |
| gethostbyname | Retrieves host information corresponding to a host name from a host database. Deprecated: use getaddrinfo instead. |
| gethostname | Retrieves the standard host name for the local computer. |
| GetNameByType | Retrieves the name of a network service for the specified service type. |
| getnameinfo | Provides name resolution from an IPv4 or IPv6 address to an ANSI host name and from a port number to the ANSI service name. |
| GetNameInfoW | Provides name resolution from an IPv4 or IPv6 address to a Unicode host name and from a port number to the Unicode service name. |
| getpeername | Retrieves the address of the peer to which a socket is connected. |
| getprotobyname | Retrieves the protocol information corresponding to a protocol name. |
| getprotobynumber | Retrieves protocol information corresponding to a protocol number. |
| getservbyname | Retrieves service information corresponding to a service name and protocol. |
| getservbyport | Retrieves service information corresponding to a port and protocol. |
| GetService | Retrieves information about a network service in the context of a set of default namespaces or a specified namespace. |
| getsockname | Retrieves the local name for a socket. |
| getsockopt | Retrieves a socket option. |
| GetTypeByName | Retrieves a service type GUID for a network service specified by name.
|
| htonl | Converts a u_long from host to TCP/IP network byte order (which is big-endian). |
| htons | Converts a u_short from host to TCP/IP network byte order (which is big-endian). |
| inet_addr | Converts a string containing an (Ipv4) Internet Protocol dotted address into a proper address for the
in_addr structure. |
| inet_ntoa | Converts an (IPv4) Internet network address into a string in Internet standard dotted format. |
| InetNtop | converts an IPv4 or IPv6 Internet network address into a string in Internet standard format. The ANSI version of this function is inet_ntop. |
| InetPton | Converts an IPv4 or IPv6 Internet network address in its standard text presentation form into its numeric binary form. The ANSI version of this function is inet_pton. |
| ioctlsocket | Controls the I/O mode of a socket. |
| listen | Places a socket a state where it is listening for an incoming connection. |
| ntohl | Converts a u_long from TCP/IP network order to host byte order (which is little-endian on Intel processors). |
| ntohs | Converts a u_short from TCP/IP network byte order to host byte order (which is little-endian on Intel processors). |
| recv | Receives data from a connected or bound socket. |
| recvfrom | Receives a datagram and stores the source address. |
| select | Determines the status of one or more sockets, waiting if necessary, to perform synchronous I/O. |
| send | Sends data on a connected socket. |
| sendto | Sends data to a specific destination. |
| SetAddrInfoEx | Registers a host and service name along with associated addresses with
a specific namespace provider. |
| SetService | Registers or removes from the registry a network service within one or more namespaces. Can also add or remove a network service type within one or more namespaces. |
| setsockopt | Sets a socket option. |
| shutdown | Disables sends or receives on a socket. |
| socket | Creates a socket that is bound to a specific service provider. |
| TransmitFile | Transmits file data over a connected socket handle. |
| TransmitPackets | Transmits in-memory data or file data over a connected socket. |
| WSAAccept | Conditionally accepts a connection based on the return value of a condition function, provides quality of service flow specifications, and allows the transfer of connection data. |
| WSAAddressToString | Converts all components of a
sockaddr structure into a human-readable string representation of the address. |
| WSAAsyncGetHostByAddr | Asynchronously retrieves host information that corresponds to an address. |
| WSAAsyncGetHostByName | Asynchronously retrieves host information that corresponds to a host name. |
| WSAAsyncGetProtoByName | Asynchronously retrieves protocol information that corresponds to a protocol name. |
| WSAAsyncGetProtoByNumber | Asynchronously retrieves protocol information that corresponds to a protocol number. |
| WSAAsyncGetServByName | Asynchronously retrieves service information that corresponds to a service name and port. |
| WSAAsyncGetServByPort | Asynchronously retrieves service information that corresponds to a port and protocol. |
| WSAAsyncSelect | Requests Windows message-based notification of network events for a socket. |
| WSACancelAsyncRequest | Cancels an incomplete asynchronous operation. |
| WSACleanup | Terminates use of the Ws2_32.DLL. |
| WSACloseEvent | Closes an open event object handle. |
| WSAConnect | Establishes a connection to another socket application, exchanges connect data, and specifies needed quality of service based on the specified
FLOWSPEC structure. |
| WSAConnectByList | Establishes a connection to one out of a collection of possible endpoints represented by a set of destination addresses (host names and ports). |
| WSAConnectByName | Establishes a connection to another socket application on a specified host and port |
| WSACreateEvent | Creates a new event object. |
| WSADeleteSocketPeerTargetName | Removes the association between a peer target name and an IP address for a socket. |
| WSADuplicateSocket | Returns a structure that can be used to create a new socket descriptor for a shared socket. |
| WSAEnumNameSpaceProviders | Retrieves information about available namespaces. |
| WSAEnumNameSpaceProvidersEx | Retrieves information about available namespaces. |
| WSAEnumNetworkEvents | Discovers occurrences of network events for the indicated socket, clear internal network event records, and reset event objects (optional). |
| WSAEnumProtocols | Retrieves information about available transport protocols. |
| WSAEventSelect | Specifies an event object to be associated with the specified set of FD_XXX network events. |
| __WSAFDIsSet | Specifies whether a socket is included in a set of socket descriptors. |
| WSAGetLastError | Returns the error status for the last operation that failed. |
| WSAGetOverlappedResult | Retrieves the results of an overlapped operation on the specified socket. |
| WSAGetQOSByName | Initializes a
QOS structure based on a named template, or it supplies a buffer to retrieve an enumeration of the available template names. |
| WSAGetServiceClassInfo | Retrieves the class information (schema) pertaining to a specified service class from a specified namespace provider. |
| WSAGetServiceClassNameByClassId | Retrieves the name of the service associated with the specified type. |
| WSAHtonl | Converts a u_long from host byte order to network byte order. |
| WSAHtons | Converts a u_short from host byte order to network byte order. |
| WSAImpersonateSocketPeer | Used to impersonate the security principal corresponding to a socket peer in order to perform application-level authorization. |
| WSAInstallServiceClass | Registers a service class schema within a namespace. |
| WSAIoctl | Controls the mode of a socket. |
| WSAJoinLeaf | Joins a leaf node into a multipoint session, exchanges connect data, and specifies needed quality of service based on the specified structures. |
| WSALookupServiceBegin | Initiates a client query that is constrained by the information contained within a
WSAQUERYSET structure. |
| WSALookupServiceEnd | Frees the handle used by previous calls to
WSALookupServiceBegin and
WSALookupServiceNext. |
| WSALookupServiceNext | Retrieve the requested service information. |
| WSANSPIoctl | Developers to make I/O control calls to a registered namespace. |
| WSANtohl | Converts a u_long from network byte order to host byte order. |
| WSANtohs | Converts a u_short from network byte order to host byte order. |
| WSAPoll | Determines status of one or more sockets. |
| WSAProviderConfigChange | Notifies the application when the provider configuration is changed. |
| WSAQuerySocketSecurity | Queries information about the security applied to a connection on a socket. |
| WSARecv | Receives data from a connected socket. |
| WSARecvDisconnect | Terminates reception on a socket, and retrieves the disconnect data if the socket is connection oriented. |
| WSARecvEx | Receives data from a connected socket. |
| WSARecvFrom | Receives a datagram and stores the source address. |
| WSARecvMsg | Receives data and optional control information from connected and unconnected sockets. |
| WSARemoveServiceClass | Permanently removes the service class schema from the registry. |
| WSAResetEvent | Resets the state of the specified event object to nonsignaled. |
| WSARevertImpersonation | Terminates the impersonation of a socket peer. |
| WSASend | Sends data on a connected socket. |
| WSASendDisconnect | Initiates termination of the connection for the socket and sends disconnect data. |
| WSASendMsg | Sends data and optional control information from connected and unconnected sockets. |
| WSASendTo | Sends data to a specific destination, using overlapped I/O where applicable. |
| WSASetEvent | Sets the state of the specified event object to signaled. |
| WSASetLastError | Sets the error code. |
| WSASetService | Registers or removes from the registry a service instance within one or more namespaces. |
| WSASetSocketPeerTargetName | Used to specify the peer target name (SPN) that corresponds to a peer IP address. This target name is meant to be specified by client applications to securely identify the peer that should be authenticated. |
| WSASetSocketSecurity | Enables and applies security for a socket. |
| WSASocket | Creates a socket that is bound to a specific transport-service provider. |
| WSAStartup | Initiates use of WS2_32.DLL by a process. |
| WSAStringToAddress | Converts a numeric string to a
sockaddr structure. |
| WSAWaitForMultipleEvents | Returns either when one or all of the specified event objects are in the signaled state, or when the time-out interval expires. |