Date: Mon, 04 Dec 2006 17:21:14 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: Is there a standard function for converting IP address to number? Message-ID: <4574590A.1010901@infracaninophile.co.uk> In-Reply-To: <20061204124550.GA1766@host.my.domain> References: <20061204124550.GA1766@host.my.domain>
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a@zeos.net wrote:
> Is there a standard function converting four numbers to one 32-bit=20
> IP address?
>=20
> I mean a function like
>=20
> f(i, j, k, l) {
> return (((((i << 8) | j) << 8) | k) << 8) | l;
> }
Not exactly. inet_ntoa() and inet_aton() are about the closest I can
think of. There's a range of similar functions described in the
inet(3) man page for converting from struct in_addr (essentially
an IPv4 address expressed as a 32bit int) to a textual representation
of an IPv4 number, and vice versa.=20
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
Kent, CT11 9PW
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