Re: [PATCH 00/11] TProxy for IPv6

[Amos Jeffries <squid3@treenet.co.nz>]

Jan Engelhardt wrote:
> On Monday 2009-09-14 14:20, Amos Jeffries wrote:
>>> assert(socket(PF_INET6, ...) >= 0);
>>> assert(setsockopt(fd, SOL_IP, IP_TRANSPARENT, ...) == 0);
>>> assert(bind(fd, {::2}) == 0);
>>>
>>> At least something like that I remember to have used to determine
>>> tproxy-2.x ipv4 availability in the days. (I.e. seeing if setsockopt
>>> failed.)
>> Thanks Jan. I gave a variant that a try. It does seem to detect the feature
>> support nicely.
>>
>> However, trying to bind the real IP:port soon after results in "(98) Address
>> already in use" even with a shutdown(tmp_sock,...) added to clean up after the
>> test.
> 
> Odd, since binding to port 0 should give you a random one,
> and there are plenty.
> Does SO_REUSEADDR help it a bit?

um... thanks for the hint.
I was re-using a handy address object without un-setting the port.
It works fully now.

AYJ