6242b2ee9c
With a complete reorganisation of the directory structure and most of the content converted to pandoc-flavoured markdown. Some TODO's left before this can go live: - Main page - Atom feeds - Bug tracker
149 lines
6.5 KiB
Markdown
149 lines
6.5 KiB
Markdown
% Ncdc Q&A
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# About ncdc
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## What about other text-mode clients?
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[microdc2](http://corsair626.no-ip.org/microdc/) - A rather nice client, yet
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not exactly there. It's limited to connecting to a single hub, hasn't been
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updated since 2006, and the readline interface is slightly awkward to use.
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[nanodc](http://sourceforge.net/projects/nanodc/) - Can't comment much on this,
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except maybe that rocket science is perhaps easier than getting nanodc to
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compile.
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LDCC - Uses DCTC as backend and an interface based on TurboVision. All
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mentioned projects are dead: neither LDCC, DCTC nor TurboVision are seeing any
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recent development.
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[ShakesPeer](http://shakespeer.bzero.se/) - Appears to have a commandline
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interface as well. I haven't personally tried it, but have not heard many
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positive things about it. Has not seen any recent development, either.
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## Why did you start from scratch? Why not use the DC++ core?
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There are several reasons why I chose not to use code from existing projects,
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but the two most important reasons are the following: 1) I am a control freak,
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and 2) personal preferences.
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**Control freak:** I have no idea how to create an interface to a protocol if I
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don't know the overall design and all the tiny details of the actual protocol
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I'm working with. And what's a better way to get used to a protocol than by
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writing everything yourself? Then there's some other advantages to
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reimplementing everything: I get to choose the library dependencies and the
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memory/CPU efficiency trade-offs, and I am not limited by an existing
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implementation that needs quite a few modifications to achieve what I want.
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Most of the "special features not commonly found in other clients" mentioned on
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the [homepage](/ncdc) are a direct result of this.
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**Personal preferences:** These are simple: I rather dislike C++ and working
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with other people's code. Working with other people's C++ code isn't exactly
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something I wish to spend my free time on.
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## Does ncdc support TLS 1.2?
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Yes, but you need a recent version of GnuTLS. Nobody knows what counts as
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"recent", exactly, but I'm guessing any 3.0+ version will do.
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## Does ncdc support TLS 1.3?
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Yes, but you need an even more recent version of GnuTLS.
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## What protocol features does ncdc support?
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For ADC: BASE, RF, TIGR, BZIP, BLOM, ADCS, KEYP and SUDP.
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For NMDC: NoGetINFO, NoHello, UserIP2, MiniSlots, XmlBZList, ADCGet, TTHL and TTHF.
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ncdc also supports TLS-enabled connections for both hub connections and
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client-to-client connections on both ADC and NMDC protocols. Note that ncdc
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does not support some of the older NMDC protocol features, like $Get,
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$GetZBlock, $CHUNK, $Cancel or non-XML file lists. I am not aware of an other
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up-to-date client that still uses any of these features.
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## What are those flags / character indications in the connection list?
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Since the manual page doesn't cover those yet, I'll document it here for now:
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The header has `St`, where the `S` stands for Status and `t` for whether TLS
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encryption is used or not. The status flags can be either **C**onnecting,
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**H**andshake, **I**dle, **D**ownloading, **U**ploading or **-** for disconnected.
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## ...And what about those in the user list?
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The user list has three boolean flags: **O**perator, **P**assive, and whether the client has **T**LS enabled.
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# Troubleshooting
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## Luadch: "(error-40) Invalid named parameter in inf: I4"
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This error occurs when connecting to (some?) luadch hubs. The problem here is
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that IP address autodetection is broken on these hubs, and you can work around
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it by manually setting `active_ip` to your (public) IP address: `/set
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active_ip 1.3.3.7`.
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## The Alt- keys don't work!
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The ncdc manual refers to the "meta" key as Alt-something, but the actual key
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to use tends to differ depending on your setup. In almost every setup, you can
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press and release the 'Esc' key as a replacement for Alt-something. If you're
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on OS X, [this stackoverflow answer](http://stackoverflow.com/a/438892)
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may be helpful.
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## Ncdc crashes a lot!
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Ncdc 1.20 has no known bugs that may cause a crash. If you're running an older
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version of ncdc, please upgrade. If your ncdc is up to date and you still have
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a crash, please report a bug.
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## Ncdc uses too much disk space!
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First, look where this disk space goes to (hint: use [ncdu](/ncdu)). If it's
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the log files: you can safely delete or rotate them (see next question).
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The _db.sqlite3_ file can also grow quite large in certain situations. If you
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modify or rename a lot of files in your share and ncdc re-hashes them, the old
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hash data associated with the files is not removed from the database, resulting
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in wasted disk space. The `/gc` command in ncdc can be used to clean up this
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unused data. Be warned, however, that this command needs roughly twice the size
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of the old db.sqlite3 file for temporary storage, so make sure you have enough
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space available. (Note that this behaviour is not specific to ncdc, most other
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DC clients do the same.)
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## Why doesn't ncdc rotate log files automatically?
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Because you can easily do that yourself. You can either use logrotate or a
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simple script that runs from a cron. For an example of the latter option,
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[this is the script I use](http://p.blicky.net/s7132), which is run as a
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monthly cron job.
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# Can ncdc...
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## Can ncdc run in the background / as a daemon?
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As with most ncurses applications: no. At least, it does not have this
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functionality built-in. Ncdc is designed to be used in combination with a
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separate terminal multiplexer or detach utility to handle this. Have a look at
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[GNU screen](http://www.gnu.org/s/screen/),
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[tmux](http://tmux.sourceforge.net/) or [dtach](http://dtach.sourceforge.net/).
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## Does ncdc support UPnP?
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Not natively. However, it is possible to use [this
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script](http://www.howtoforge.com/administrating-your-gateway-device-via-upnp)
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and manually keep a port open using a cron job. I have no experience with this
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myself, though. I just run ncdc directly on my router. :-)
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## Are there any programs available for analyzing the transfers.log file?
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Nothing like that is included in the release yet, but there is a simple Perl
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script available: [ncdc-transfer-stats](http://p.blicky.net/eu00a), and a short
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Go program: [ncdc-share-report](http://p.blicky.net/h25z8).
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## Can ncdc use the hash data or configuration from an existing DC++ installation?
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No, ncdc uses its own configuration and hash storage directory. However, on
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popular demand I could write a conversion utility to transfer the hash data
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from other clients to ncdc's format. (Contrary to my expectations, there hasn't
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been much interest in such a tool ever since I wrote this FAQ entry many years
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ago. So I guess this isn't really a FAQ).
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