"no matching session" in ng_pppoe.c 1.74.2.4? (RELENG_6)

[Alexander Motin]

cpghost wrote:
>>> Could you provide tcpdump output for connection tries from your
>>> Ethernet interface? Use "-pes 0" options please.
>> Will do; but I'll first have to wait 24h from now to get a
>> forcibly disconnected session (I've just had to restart ppp
>> again).
> 
> All right, I've got a good tcpdump now:
> 
> # tcpdump -i sis0 -n -pes 0
> tcpdump: verbose output suppressed, use -v or -vv for full protocol
> decode listening on sis0, link-type EN10MB (Ethernet), capture size
> 65535 bytes
> 
> 17:06:08.400881 00:00:24:c2:45:74 > ff:ff:ff:ff:ff:ff,
>   ethertype PPPoE D (0x8863), length 32: PPPoE PADI [Host-Uniq
>   0xC0C263C1] [Service-Name]
> 
> 17:06:08.400891 00:00:24:c2:45:74 > ff:ff:ff:ff:ff:ff, ethertype PPPoE
>   D (0x8863), length 32: PPPoE PADI [Host-Uniq 0xC0ED45C1]
>   [Service-Name]
> 
> 17:06:08.400898 00:00:24:c2:45:74 > ff:ff:ff:ff:ff:ff, ethertype PPPoE
>   D (0x8863), length 32: PPPoE > PADI [Host-Uniq 0x40C263C1]
>   [Service-Name]

Your host generates huge number of simultaneous session requests. 
Looking on different Host-Uniq values it should be different ng_pppoe 
sessions/hooks as Host-Uniq is actually pointer to the hook/session 
internal data and it stays persistent for all packets of the same 
session. So it looks that something creates those many hooks.

I think such behaviour can take place if ppp daemon for some reason 
don't waits for reply but closes session immediately after sending 
connect request. If it so it also explains original "no matching 
session" errors as for the answer received time session/hook can already 
be destroyed.

Provide please your ppp configuration files and part of detailed log 
file (set log All) describing connection attempts.

PS: I am not ppp daemon expert, but quick code look shows that 
connection waiting can be configured with 'set cd ...' command. Setting 
'set cd 0' gives results close to yours. Have you something like that in 
your configuration?

-- 
Alexander Motin