So, from SSL you can find the socket and thence the IP, and in theory you can use things like the ARP ioctls to _try_ to find the MAC (eg Ethernet) address - however that last part only really works when all the systems are in the same broadcast domain. If they are on the other side of a router or routers you will not be able to get the remote system's MAC address - the MAC address is not "end-to-end" in an internet or intranet, only in a LAN.

So, if you are relying on finding the remote's MAC address, you are basically by definition limiting your application to a LAN.

rick jones
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