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How to change IGMP packet header

Posted on 2006-04-04
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Last Modified: 2013-12-23
In multicast we all know that IGMP protocol has no authentication, so I decided to modified the IGMP by input a simple authentication part in IGMP header. But I dont know how to modify header of IGMP packet send from Windows to streaming server.
Could you please tell me the way dealing with Windows driver that can automatic modify header of IGMP packet send from Windows to streaming server.

Thanks a lot.
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Question by:hophi
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by:bbao
ID: 16376178
um... you know, an authentication needs at least two sides to participate. if you only modify something at one side, other people at the another side can not determine the proprietary protocol you defined.
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by:hophi
ID: 16377159
Dear  Bbao
Yeah,  authentication needs at least two sides to participate. The streaming server using socket in Linux enviroment and I can modify it. But the problem is the client side.
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bbao earned 1000 total points
ID: 16410917
IGMP is a layer-3 protocol, windows sockets 2 enables it through the use of socket options and IOCTLs, but of course does not support a customizable version of IGMP packets at its lower layers.

http://msdn.microsoft.com/library/en-us/winsock/winsock/igmp_and_windows_sockets.asp

so that means you need to hardcode your own IGMP implementation... anyway, you dont need to do programming at NIC driver level which stays at layer 1.5/2.
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