tftp server does not work behinf tap interface -

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i have problem tftp server running under qemu. qemu connected host tap interface. output wireshark shows packed arrived host, hosts udp socket (and put command) ends timeut, netstat -au shows no data arrived.

logs wireshark: wireshrk logs

tap interface created this:

tunctl -g 1000 ip addr add 192.168.7.1 broadcast 192.168.7.255 dev tap0 ip link set dev tap0 ip route add 192.168.7.2 dev tap0

iptabls , firewall disabled. how can start debug this?

it seem because in udp packet tftp server not calculate crc , put zeroes there. understand possible behaviur, question why tap interface behave that...


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