> On Oct 31, 2018, at 10:04 PM, Eric Dumazet <eric.duma...@gmail.com> wrote:
>
>
>
>> On 10/31/2018 08:50 PM, Christoph Paasch wrote:
>>
>> What we had here is that we wanted to let a server initiate more than 64K
>> connections *while* binding also to a source-IP.
>> With TCP the bind() would then pick a source-port and we ended up hitting the
>> 64K limit. If we could do an atomic "bind + connect", source-port selection
>> could ensure that the 4-tuple is unique.
>>
>> Or has something changed in recent times that allows to use the 4-tuple
>> matching when doing this with TCP?
>
>
> Well, yes, although it is not really recent (this came with linux-4.2)
>
> You can now bind to an address only, and let the sport being automatically
> chosen at connect()
Oh, I didn’t knew about this socket option. Thanks :-)
Christoph
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=90c337da1524863838658078ec34241f45d8394d
>
