problem with VLAN tagged ICMP

[Madhavi]

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Hi

I am writing a device driver that can send VLAN Tagged packets on
linux-2.4.19. I have written a function mydev_hard_header() and assigned
dev->hard_header to mydev_hard_header.

The function mydev_hard_header() creates ethernet header + VLAN header, if
the packet is not already tagged.

When I tried ping on this device, I am seeing that the first 6-7 packets
are tagged and later, they are all going untagged. mydev_hard_header()
function is also not being called for these packets. I have also confirmed
that the control is not going to mydev_rebuild_hard_header() function.

ARP packets are always getting tagged. This problem is seen only with ICMP.

Any guesses why this could be happening? Could there be any cache-related
issues?

Thanks & regards
Madhavi.

Madhavi Suram
Software Engineer
Customer Delivery / Networks
Sasken Communication Technologies Limited
139/25, Ring Road, Domlur
Bangalore - 560071 India
Email: [e-mail]
Tel: + 91 80 5355501 Extn: 8062
Fax: + 91 80 5351133
URL: www.sasken.com

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