Sockets Headers

This chapter describes the contents of headers used by the X/Open Sockets functions, macros and external variables.

Headers contain the definition of symbolic constants, common structures, preprocessor macros and defined types. Each function in Sockets Interfaces specifies the headers that an application must include in order to use that function. In most cases only one header is required. These headers are present on an application development system; they do not have to be present on the target execution system.