[haiku-development] Network Issues. Part II. Yet another tile for the Puzzle ...
- From: Siarzhuk Zharski <zharik@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Thu, 19 Nov 2009 23:34:40 +0100
Good evening, Axel!
Axel Dörfler schrieb:
The MAC address is not the problem; the IP address might be, though.
I have activated tracing in ipv4.cpp and see that "packed was not for us
c0a8b301 -> c0a8b350". Additional tracing in mentioned
datalink_is_local_address show me the iteration of "loop " with
1.0.0.127 and my "SiS191/0" with default autoconfig address. Frankly
speaking it was not a big surprise for me. ;-) As was already cleared -
Haiku network stack doesn't accept unicast packets for the "freshly"
offered ip address.
After that I have added 0x0080 in flags to force server use broadcast
answers for discover and request messages. And after reboot I become
working DHCP autoconfiguration on my system.
At the moment I'm not familiar with such DHCP details but this
server (ISC-DHCP one) works well with other network devices and
operating
systems in ym home network. The only problematic combination is Haiku
OS
and my driver in DHCP mode.
Since your driver received the packet, it cannot be the driver's fault
anymore, but the problem has to be in the higher levels.
But the Problem with "driver-sensitive DHCP failure" is still not
completely clear. I have acquired a tcpdump of DHCP auto-configuration
session for rtl8169 NIC and found that it goes OK without of adding
broadcast flag into discover and request messages! Looks like I have to
investigate this case more. :-)
Regarding this problem I have following questions:
1) For what the net_server sends some data just after netwrok interface
was up but _before_ the network link become really active? R5 drivers
compatibility?
My driver ignores this request and returns B_ERROR. I have to do this
because NIC hardware will break data ring structures consistency in case
sending data with non-active link. :-( I browsed through all network
drivers sources in the Haiku repository and found no cases of handling
this situation. May be that can be a difference and affect on data flow.
2) Which error code should I return form the Write IOCTL call in case
the link is not active?
Thank you for the patience and attention!
---
Kind Regards,
S.Zharski
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