CODEWITHSUNDEEP
c++cwindowsnetwork-programming
Dave
Dave

Reputation: 1659

Programming at Network Layers 3 and 2

Taking Windows 7 as an example platform, I would like to understand how I would write an application program at the layer 3 (IP) layer. Take as a simple illustrative example the case where I'd like to implement ping myself in C/C++. How would I go about doing this?

The problem, of course, is that when operating at the IP layer, instead of the TCP/UDP layer, there is no port number identifying the process (my process) for the IP layer to hand the packet off to. So, this obisouly can't be a traditional application layer program.

Instead, I think what I need to is write a level 3 hdnler that does what I want and register it with the OS to displace the existing IP layer implmentatio.

Is my thought correcy? If so, how would I implement it? If not, what is the corret approach?

Finally, I'd like to ask the exact same questions about layer 2 (Ethernet). How may I directly send amd receive Ethernet frames?

Upvotes: 1

Views: 1974

Answers (1)

user2990252
user2990252

Reputation: 181

winpcap is best for your neeeds. you can send / receive raw packet by windpcap api. have a good luck.

Upvotes: 1

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