@node Server
@section Server part

Except for common @code{-mtu}, @code{-stats}, @code{-egd} options server
has the following ones:

@table @code

@item -proto
@ref{Network, network protocol} to use. Can be @emph{udp} (default),
@emph{tcp} or @emph{all}.

@item -bind
Address (@code{host:port} format) we must bind to.

@item -conf
Path to JSON file with the configuration.

@item -proxy
Start trivial HTTP @ref{Proxy} server on specified @emph{host:port}.

@end table

Configuration file is JSON file with following example structure:

@verbatim
{
  "9b40701bdaf522f2b291cb039490312": {  <-- Peer identifier
    "name": "stargrave",                <-- OPTIONAL human readable name
    "up": "./stargrave-up.sh",          <-- up-script
    "down": "./stargrave-down.sh",      <-- OPTIONAL down-script
    "timeout": 60,                      <-- OPTIONAL overriden timeout
    "noise": true,                      <-- OPTIONAL noise enabler
                                            (default: false)
    "cpr": 64,                          <-- OPTIONAL constant packet
                                            rate in KiB/sec
    "verifier": "2c15bbdffc73193bea56db412bce1143c68ccbdaa9e2eade53a684497646a685"
  },
  [...]
}
@end verbatim

See @ref{Verifier} for its description.

up-script executes each time connection with the client is established.
Its @emph{stdout} output must contain TAP interface name as the first
line. This script can be simple @code{echo tap10}, or maybe more
advanced like this:
@example
#!/bin/sh
$tap=$(ifconfig tap create)
ifconfig $tap inet6 fc00::1/96 mtu 1412 up
echo $tap
@end example

Each minute server rereads and refreshes peers configuration and adds
newly appeared identities, deletes an obsolete ones.

You can use convenient @code{utils/newclient.sh} script for new client
creation:

@verbatim
% ./utils/newclient.sh Alice
[...]
Your id is: 7012df29deee2170594119df5091d4a2

Place the following JSON configuration entry on the server's side:

    "906e34b98750c4f686d6c5489508763c": {
        "name": "Alice",
        "up": "/path/to/up.sh",
        "verifier": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
    }
[...]
@end verbatim