55 lines
2.4 KiB
Plaintext
55 lines
2.4 KiB
Plaintext
ncp - a fast file copy tool for LANs
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(Note: This is from 2000 and has not been touched since. I still use it on a
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daily basis)
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Download it from http://dl.fefe.de/ncp-1.2.4.tar.bz2 [pgp sig]! The current
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version is 1.2.4. Recent changes: switch to libowfat
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Good news: I got an email from Ripclaw from Rock Linux who told me that they are
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going to integrate ncp.
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Please note that on recent IPv6 implementations, link-local addresses are not
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valid without specifying an interface, so you can't npoll with a link-local
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address on the command line. Standard npush/npoll now works with link-local
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addresses, though. Due to Linux 2.4.0test brokenness, you currently can't npoll
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from the same machine that runs npush.
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Since ncp is based on libdjb, it features full IPv6 support and the DNS resolver
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is built in, i.e. no more security problems because of lame libc functions.
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I also provide a statically linked x86 Linux binary [sig] compressed with upx
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which only weighs in at ~20k. I shrunk the binary with diet libc.
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npush will now use IPv6 and IPv4 multicast on the multicast groups
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ff02::6e63:7030 (6e63:7030 == 'ncp0') and 224.110.99.112 (110.99.112 == 'ncp').
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If both methods fail, npush will resort to the broadcast packets used by
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previous versions. You can force the broadcast method by passing "-b" to npush
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so that previous npoll versions can see the announcements.
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"ncp" is a utility for copying files in a LAN. It has absolutely no security or
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integrity checking, no throttling, no features, except one: you don't have to
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type the coordinates of your peer.
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Please note that the DNS resolver does not use /etc/hosts (as that would not
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work with IPv6 anyway), so you should have a properly configured DNS server.
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Basically it works like this:
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1. You and your buddy want to play Quake
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2. Your buddy has a level that you don't have
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3. He types npush filename and waits. npush sends out UDP announcement packets
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proclaiming that someone wants to send something
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4. You type npoll. npoll waits until it sees one of these packets
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5. The files are copied with tar over a TCP socket, so permissions and file
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dates (and if you are root, owners) are preserved.
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There are other usage modes. You can also use it like this:
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peer1$ ncp
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peer2$ ncp peer1 file1 file2 file3
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or like this:
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peer1$ npush file1
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peer2$ npoll peer1
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