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Bring the multiplayer docs inline with other docs.

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* Break at 72 chars.
* It's Quake II and not quake2
* It's HTTP and not http
* Don't use german placeholders
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Yamagi Burmeister 2019-04-03 21:08:07 +02:00
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doc/07_multiplayer.md
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# Multiplayer Servers
Generally running a Yamagi Quake II server is the same as running a Vanilla Quake2 server, so
the old guides (e.g. http://it.rcmd.org/networks/quake2/q2_linux_server_howto.php) should still apply.
Generally running a Yamagi Quake II server is the same as running a
Vanilla Quake2 server, so the old guides should still apply.
One thing to keep in mind is that the server must be restarted at least every 49 days, because
the Quake2 network protocol represents time in milliseconds as a 32bit int and after 49 days that
int overflows back to zero leading to all kinds of trouble.
This problem has always existed in Quake2 and is not fixable (at least not without breaking
compatibility with the existing network protocol), but back in Win9x days this was less of a problem
because 1. Windows crashed frequently anyway and 2. Win9x had the same bug and crashed after 49 days
or so...
One thing to keep in mind is that the server must be restarted at least
every 49 days, because the Quake II network protocol represents the
interal time as a 32 bit integer and after 49 days that integer
overflows, leading to all kinds of trouble.
This problem has always existed in Quake II and is not fixable (at least
not without breaking compatibility with the existing network protocol),
but back in Win9x days this was less of a problem because Windows
crashed frequently anyways and Win9x had the same bug and crashed after
49 days or so...
Apart from this, we'll only document changes/additions here.
## HTTP Downloads
Like r1q2 and some other Quake2 source ports, we allow downloading game data for multiplayer via http.
This is a lot faster than Quake2's internal protocol that was used in Vanilla Quake2 and Yamagi Quake II
up to version 7.30.
Like r1q2 and some other Quake II source ports, we allow downloading
game data for multiplayer via HTTP. This is a lot faster than the Quake
II internal protocol that was used in the original client and Yamagi
Quake II up to version 7.30.
As a **client** you don't have to do anything, just use a Yamagi Quake II version newer than 7.30
and if you build it yourself don't disable cURL support.
As a **client** you don't have to do anything, just use a Yamagi Quake
II version newer than 7.30 and if you build it yourself don't disable
cURL support.
For **servers** the following must be done:
### Put the game data on a http server
The directory structure on the server must be the same as in the game, so if you want to provide
`maps/blub.bsp` and your server base path is `http://example.com/q2data/`, then you must put that
map into `http://example.com/q2data/maps/blub.bsp`.
The directory structure on the server must be the same as in the game,
so if you want to provide `maps/foo.bsp` and your server base path is
`http://example.com/q2data/`, then you must put that map into
`http://example.com/q2data/maps/foo.bsp`.
You can either just put the raw .bsp (and files the bsp needs, textures,
modes and so on) on your HTTP server, or you can upload a whole `.pak`
or `.pk3` that contains the needed data. If you're using a `.pak` or
`.pk3` you need a **file list** that's hosted on your http server.
You can either just put the raw .bsp (and files the bsp needs like textures) on your http server, or
you can upload a whole `.pak` or `.pk3` that contains the needed data. If you're using a `.pak`
or `.pk3` you need a **file list** that's hosted on your http server.
#### Map specific file lists
One way is to have one file list per map that's running on your server.
If your server is rotating between `maps/blub.bsp` and `maps/bla.bsp`, you'd have
`http://example.com/q2data/maps/blub.filelist` and `http://example.com/q2data/maps/bla.filelist`.
One way is to have one file list for each map that's running on your
server. If your server is rotating between `maps/foo.bsp` and
`maps/bar.bsp`, you'd have `http://example.com/q2data/maps/foo.filelist`
and `http://example.com/q2data/maps/foo.filelist`.
A file list is a plain text file that lists one file path per line that's to be downloaded.
Those paths are relative to the server base path and **must not** begin with a slash!
A file list is a plain text file that lists one file path per line
that's to be downloaded. Those paths are relative to the server base
path and **must not** begin with a slash!
So if `maps/bar.bsp` needs `bar.pak` and `textures.pak`, your
`http://example.com/q2data/maps/bar.filelist` would look like:
So if `maps/bla.bsp` needs `bla.pak` and `textures.pak`, your `http://example.com/q2data/maps/bla.filelist`
would look like:
```
bla.pak
bar.pak
textures.pak
```
#### Global File List
Instead of map-specific file lists, you could have one global file list. All those files are downloaded
when someone connects to your server, regardless of the currently running map.
Instead of map-specific file lists, you could have one global file list.
All those files are downloaded when someone connects to your server,
regardless of the currently running map.
This global file list must be at your server base path and must be called `.filelist`.
This global file list must be at your server base path and must be
called `.filelist`.
So in our example `http://example.com/q2data/.filelist` could look like:
```
bla.pak
blub.pak
bar.pak
foo.pak
textures.pak
```
or
```
maps/bla.bsp
maps/blub.bsp
maps/bar.bsp
maps/foo.bsp
textures/my_tex.wal
```
### Configure the quake2 server to tell clients about the http server
All you have to do is to set the `sv_downloadserver` CVar to your server base path, so in our example
you could start your dedicated server with `q2ded +set sv_downloadserver http://example.com/q2data/`
(+ your other options).
### Configure the Quake II server to tell clients about the HTTP server
This CVar will be set to connecting Multiplayer Clients and if they support http downloading they
will try to load missing game data from that server.
All you have to do is to set the `sv_downloadserver` CVar to your server
base path, so in our example you could start your dedicated server with
`q2ded +set sv_downloadserver http://example.com/q2data/` (+ your other
options).
This CVar will be set to connecting Multiplayer Clients and if they
support HTTP downloading they will try to load missing game data from
that server.