BOOTP tracking

Taras Kolesko

Hello again.

I've got question about BOOTP packets, which are generating by my evaluation board. I've tried to track them, by listening port 67 on broadcast and multicast groups, but for some reason i can't choose the right source. I've tryed things like

boardListen_1.JoinMulticastGroup(IPAddress.Parse("0.0.0.0"))

But that is not working. Wireshark shows, that the packets are sending correctly. What do you reccomend to capture these packets correctly? Which source i should track?

over 8 years ago

0 Raja over 8 years ago

TI__Guru* 81335 points

Hi,

Please provide the device part number and EVM information. Also provide more information on your testing setup(Boot mode, etc..)

Thanks,

0 Taras Kolesko over 8 years ago in reply to Raja

Expert 1730 points

I'm using TMDSEVM6670L, with Ethernet boot mode, dynamic ip assigment, little endianess.

I've learned, that it isn't possible to create socket with board, while it sends bootp packets, so i can't even intercept requred packets...

0 Rahul Prabhu over 8 years ago in reply to Taras Kolesko

TI__Guru** 114410 points

We typically use wireshark for boot packet analysis but in this case there seems to be some limitation with it. We are checking on this internally and will let you know if we have a suggested tool that you can use to track the bootp packets.

Regards,
Rahul

0 Taras Kolesko over 8 years ago in reply to Rahul Prabhu

Expert 1730 points

The problem is solved. I've created a mini sniffer on C#, which checks full datagram on bytes 28 and 56-61, using raw socket:

Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);
Bind(new IPEndPoint(IPAddress.Parse("192.168.1.1"), 67));
SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, true);

This looks fine to me, i can track and load. No need to use the special tool

0 Raja over 8 years ago in reply to Taras Kolesko

TI__Guru* 81335 points

Hi Taras,
We are glad that you could solve the issue. Thank you for the update.

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BOOTP tracking