Sorry for delayed reply.
On Wed, 27 May 2020 01:29:36 +0300
Sergey Ryazanov <ryazanov....@gmail.com> wrote:
> On Tue, May 26, 2020 at 12:07 PM Vitaliy Makkoveev
> <henscheltig...@yahoo.com> wrote:
>>> On 25 May 2020, at 22:04, Sergey Ryazanov <ryazanov....@gmail.com> wrote:
>>> On Sat, May 23, 2020 at 3:07 PM Vitaliy Makkoveev
>>> <henscheltig...@yahoo.com> wrote:
>>>> For example, each pipex session should have unique pair of `protocol’ and
>>>> `session_id’. These values are passed from userland. While the only
>>>> instance of npppd(8) uses pipex(4) this is not the problem. But you
>>>> introduce the case while pipex(4) will be used by multiple independent
>>>> userland programs. At least, I have interest how you handle this.
>>>
>>> This should not be a problem here. npppd(8) support server mode only.
>>> While my work is to implement acceleration for client side of L2TP
>>> connection.
>>
>> I guess they can coexist. Also you can have multiple connections to
>> ppp servers simultaneously.
>
> With 16 bits long session id field, according to birthday problem to
> reach 0.9 collision probability I need 549 simultaneous sessions.
> Should I still be worried or I have a time to complete integration
> work and then update UDP filter for love of the game?
usr.sbin/npppd/l2tp/l2tp_local.h
79 #define L2TP_SESSION_ID_MASK 0x00007fff
npppd uses 0-32767
