Re: IPv6 mass_dns and nsock_connect_udp

[Kris Katterjohn <katterjohn () gmail com>]

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On 12/02/2008 07:17 PM, David Fifield wrote:
> On Tue, Dec 02, 2008 at 07:06:35PM -0600, Kris Katterjohn wrote:
> > Previously, connect_dns_servers passed a reference to a dns_server_s
> > > sockaddr_in casted to a pointer to a sockaddr along with sizeof(struct
> > > sockaddr) which are defined as saddr and sslen respectively in
> > > nsock_connect_udp.
> > > saddr is then casted to pointer to a sockaddr_storage, but sslen remains
> > > unchanged:
> > Instead of passing "sizeof(struct sockaddr)" for sslen, you should pass in the
> > size of the struct you're using.  So pass in "sizeof(struct sockaddr_in)" for
> > IPv4 or "sizeof(struct sockaddr_in6)" for IPv6.  The current use of sockaddr{}
> > works because both it and sockaddr_in{} should always be the same size (look
> > at the sin_zero field of the latter).
>
> Kris, is this the same thing as at
>
> "Ncat: socket bind error on Mac OS X"
> http://seclists.org/nmap-dev/2008/q3/0168.html
>
> If so, then that thread might help, jah.

Not exactly, but it's certainly related.  jah's passing a much too small size
for IPv6 addresses which should never work on any system, while in the problem
above only OS X seemed to check for passed sizes larger than the expected one
(based on the family I presume).

> David Fifield

Thanks,
Kris Katterjohn

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