Hi Paolo,
Of course you're right:
netinet/in.h:#define INET6_ADDRSTRLEN 46
Thanks so much for clearing this up for me.
/Thomas
On 2012-06-11 20:40, Paolo Lucente wrote:
Hi Thomas,
INET6_ADDRSTRLEN is defined by the underlying OS as 46 bytes (to include
trailing '/0' char) - you should be able to verify this by doing a bit of
grepping in "/usr/include". Hence the definition of the field as 45 chars
in the DB schema.
Cheers,
Paolo
On Mon, Jun 11, 2012 at 01:45:26PM -0200, Thomas M Steenholdt wrote:
Hello there,
I'm about to extend the schema on my large sfacct mysql table, to
support IPv6 addresses, but there is a thing that seems strange to me.
In the README.IPv6 document, it's suggested that for IPv6 support, the
columns keeping IP addresses should be char(45).
Looking at the default size for IPv4 addresses, it seems like there's no
"overhead" calculated into the size of column, so why is char(45)
suggested instead of char(39) for IPv6 fields? 39 chars should be able
to hold an entire, non-shortened IPv6 address.
Hope to have some light shed on this - I'm probably just missing
something ;-)
Thanks in advance.
/Thomas
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