Settable socket option requirements

A type X meets the SettableSocketOption requirements if it satisfies the requirements listed below.

In the table below, a denotes a (possibly const) value of type X , p denotes a (possibly const) value that meets the Protocol requirements, and u denotes an identifier.

Table 29. SettableSocketOption requirements for extensible implementations

expression	type	assertion/note pre/post-conditions
`a . level ( p )`	`int`	Returns a value suitable for passing as the level argument to POSIX `setsockopt ()` (or equivalent).
`a . name ( p )`	`int`	Returns a value suitable for passing as the option_name argument to POSIX `setsockopt ()` (or equivalent).
`a . data ( p )`	`const void *`	Returns a pointer suitable for passing as the option_value argument to POSIX `setsockopt ()` (or equivalent).
`a . size ( p )`	`size_t`	Returns a value suitable for passing as the option_len argument to POSIX `setsockopt ()` (or equivalent), after appropriate integer conversion has been performed.

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Settable socket option requirements