BSD Functions

Function Name	Description
`accept()`	Wait for new socket connections on a listening server socket.
`bind()`	Assign network addresses to sockets.
`close()`	Terminate communication and free a socket.
`connect()`	Connect a local socket to a remote socket address.
`FD_CLR()`	Remove a socket file descriptor ID as a member of a file descriptor set.
`FD_ISSET()`	Check if a socket file descriptor ID is a member of a file descriptor set.
`FD_SET()`	Add a socket file descriptor ID as a member of a file descriptor set.
`FD_ZERO()`	Initialize/zero-clear a file descriptor set.
freeaddrinfo()	Free addrinfo structures information that getaddrinfo() has allocated.
gai_strerror()	Converts the numerical value of EAI-type error codes returned by getaddrinfo() into a meaningful string.
getaddrinfo()	Convert human-readable text strings representing hostnames or IP addresses into dynamically allocated linked list of struct addrinfo structures.
gethostname()	Returns the name of the host in a null-terminated c-string array.
getpeername()	Returns the address of the peer connected on a socket.
getsockname()	Converts a socket address to a string describing the host and another string describing the service.
`getsockopt()`	Get a specific option value on a specific TCP socket.
`htonl()`	Convert 32-bit integer values from CPU host-order to network-order.
`htons()`	Convert 16-bit integer values from CPU host-order to network-order.
`inet_addr()`	Convert a string of an IPv4 address in dotted-decimal notation to an IPv4 address in host-order.
`inet_aton()`	Convert an IPv4 address in ASCII dotted-decimal notation to a network protocol IPv4 address in network-order.
`inet_ntoa()`	Convert an IPv4 address in host-order into an IPv4 dotted-decimal notation ASCII string.
`listen()`	Set a socket to accept incoming connections.
`ntohl()`	Convert 32-bit integer values from network-order to CPU host-order.
`ntohs()`	Convert 16-bit integer values from network-order to CPU host-order.
`recv() / recvfrom()`	Copy up to a specified number of bytes received from a remote socket into an application memory buffer.
`select()`	Check if any sockets are ready for available read or write operations or error conditions.
`send() / sendto()`	Copy bytes from an application memory buffer into a socket to send to a remote socket.
sethostname()	Sets the host name with the given value in the character array.
`setsockopt()`	Set a specific option on a specific TCP socket.
shutdown()	Shut down a socket's send and/or receive operations.
`socket()`	Create a datagram (i.e., UDP) or stream (i.e., TCP) type socket.