The function
parse-ipv6-address
parses its argument string as an IPv6 address if possible, otherwise it returns
nil
.
start
and
end
specify the subsequence of
string
to parse. The default value of
start
is 0. The default value of
end
is
nil
, meaning the length of
string
.
trim-whitespace
is a boolean specifying that leading and trailing whitespace characters may be ignored. Note that the address itself must not contain any whitespace. The default value of
trim-whitespace
is
t
.
The address has to be in either standard IPv6 address notation, or dotted-quad notation. It can have the standard simplifications.
In addition, the address may be followed by a '%' character and a scope ID. If the scope ID is a string of decimal characters, it is read as a decimal number, otherwise it is taken as-is. The address may also be followed by a '/' and a prefix length in decimal format. The result ipv6-address object remembers the prefix length and prints it when the object is printed, but it does not affect the address otherwise.
If the syntax of the string
string
is correct,
parse-ipv6-address
constructs the ipv6-address object and returns it. It does not perform any address resolution.
LispWorks User Guide and Reference Manual - 21 Dec 2011