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This is great tool and nice article. The only slightly additional requirement for this tool is you know the name of the file being sent. I actually was thinking of making this optional (for the same reasons they require it, to allow many different files).

I've added a link for udpcast to my readme as an alternative. Thanks!

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There's also UFTP, it doesn't require the receiver to know the file name. (But it is different from your implementation in a number of ways, most importantly it transfers all data via UDP.)

http://www.tcnj.edu/~bush/uftp.html

And it's multicast, which saves a lot of bandwidth and makes it faster :-)

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