Hi all,
I'm unable to receive DHCP packets using qemu-system-arm 1.4.91 with
u-boot (commit: 2988eac). Problem occurs on Ubuntu 12.04 (I tried also
Debian wheezy and there was no issue). I accidentally discover that
adding '-net dump,file=/tmp/dump.pcap' cause that problem disapear, but
want to dig it and find out what the root cause is.
I tried to debug issue from u-boot source code perspective and added
verbose logging, but can't see anything strange enough:
- log with fail - qemu w/o additional dump command -
https://gist.github.com/pietrushnic/5561859
- log with pass - qemu w/ addional dump param -
https://gist.github.com/pietrushnic/5561866
Difference:
- smc_rcv status is always 0 , NetLoop timeouts for failed case
- on failed case u-boot receive some packets but not DHCP offer (I
positively verified w/ tcpdump that server sent this packet)
I'm trying to narrow down this problem from both (qemu and u-boot) side.
Is there anything else what I can do to confirm that this is not u-boot
issue ?
Maybe someone heard about this kind of problem ?
My network configuration based on: http://toast.djw.org.uk/qemu.html
I'm using versatilepb_config compiled with arm-unknown-linux-gnueabi
(created using crosstool-NG).
If provided information are insufficient, just let me know.
Regards,
pietrushnic
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