7.1 TCP/IP for z/OS

The TMA TCP for IMS product makes use of the following TCP/IP for z/OS services by issuing the appropriate API calls.

TCP/IP for z/OS Service	Description
accept	Accept a TCP/IP connection request
bind	Bind a socket to an IP address and port
close	Close a socket and free associated resources
connect	Initiate a TCP/IP connection with a specified IP address and port
fcntl	Set the operational characteristics of a socket
gethostbyaddr	Resolve an IP address into a domain name
gethostbyname	Resolve a hostname into a domain name
htonl	Convert a long integer from host to network byte order
htons	Convert a short integer from host to network byte order
inet_network	Convert an IP address from character format to internal format
inet_ntoa	Convert an IP address from internal format to character format
listen	Initiate listening on a socket bound to an IP address and port
read	Read data on a TCP/IP connection
selectex	Wait on one or more socket FDs to be posted, a timeout to occur, or an ECB to be posted
setsockopt	Set socket-related processing options
socket	Obtain (allocate) a socket descriptor for a TCP/IP connection
shutdown	Shut down a TCP/IP connection
write	Write data to a TCP/IP connection