On 07.07.2018 23:41, Sylvain Rochet wrote:
The problem is identical to to described at
https://lists.gnu.org/archive/html/lwip-users/2017-10/msg00084.html
(but there was no solution proposed)
I don't know how you managed to conclude that no solution was
proposed... User had CHECKSUM disabled, see:
https://lists.gnu.org/archive/html/lwip-users/2017-11/msg00072.html
Thank you very much for pointing this. I didn't understand how did I missed that
answer. Yes, disabling hardware checksum calculation did the trick and now
everything works ok.
Can I suggest to add some flag into netif to enable/disable software checksum
calculation? Using this flag can be selectable at compile time #if (PPP_SUPPORT
!= 0) && (CHECKSUM_GEN_xxx == 0)
add flag into netif, init it in ppp_create and use
#else
use CHECKSUM_GEN_xxx
#endif
- modem stops responding after status_cb:
connected. I checked twice with logic analyzer - there is to responses to
frames with proto=0x21. I tried two SIM cards from different mobile
providers (one requires authentication, the other not) with exactly same
result - I can get IP, DNS etc but no data exchange.
What did I missed to do?
Did you check that you are actually receiving IP packets on the remote
side ?
I have no access to other side - I have no computers with real IP (I'm in third
mobile operator local network).
Sylvain
--
Regards,
Sergey A. Borshch mailto: [email protected]
SB ELDI ltd. Riga, Latvia
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