[erlang-questions] C Node Communication Over Localhost
Mon Apr 25 21:00:34 CEST 2011
> Can you ping "shadow" while it is associated to the IP 127.0.1.1 ?
> If you've blocked ICMP echo in kernel, enable it temporarily and test.
> If ping works, try to write a small program to do a reverse
> name-resolution in C and see if it works.
Yes, I can ping shadow (127.0.1.1), just by entering "ping shadow" at
shadow's command line.
My concern with doing a hostname lookup within C and then binding to
that address was simply that my design was to have 1 erlang VM
communicate with 1 C node over a localhost channel. I was lulling
myself into a sense of security by not opening up the C node to a
potentially external IP address.
For example, network manager in Ubuntu 10.10 prepended a line to
/etc/hosts of the form "<current_ip> <hostname>". Wouldn't the reverse
lookup from within C return an address pointing to <current_ip> in this
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