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.Dd 15/4/2024
.Dt opentracker 1
.Os Unix
.Sh opentracker
.Nm opentracker
.Nd a free and open bittorrent tracker
.Sh SYNOPSIS
.Nm
.Op Fl f Ar config
.Op Fl i Ar ip-select
.Op Fl p Ar port-bind-tcp
.Op Fl P Ar port-bind-udp
.Op Fl A Ar blessed-ip
.Op Fl r Ar redirect-url
.Op Fl d Ar chdir
.Op Fl u Ar user
.Op Fl w| Fl b accesslist
.Sh DESCRIPTION
.Nm
is a bittorrent tracker that implements announce and scrape actions over the
UDP and the plain http protocol, aiming for minimal resource usage.
.Pp
When invoked with parameters, it binds to TCP and UDP port 6969 on all
interfaces. The recommended way to configure opentracker is by providing a
config file using the
.Op Fl f Ar config
option. See
.Xr opentracker.conf 4
for details.
.Pp
.Sh OPTIONS
The following options are available:
.Bl -tag -width -indent=8
.It Fl f Ar config
Parse a config file with a list of options. Consecutive command options
will override options from the config file. See
.Xr opentracker.conf 4
for details.
.It Fl i Ar ip-select
Select an ip address that will be used with the next
.Op Fl p
or
.Op Fl P
command to actually bind to this address. Setting this option without any bind
options in the config file or
.Op Fl p
or
.Op Fl P
commands will limit opentracker to only bind to this address.
.It Fl p Ar port-bind-tcp
Bind to the TCP port on the last preceding ip address set with the
.Op Fl i ip-select
option or to all available addresses if none has been set. Can be given multiple
times.
.It Fl P Ar port-bind-udp
Bind to the UDP port on the last preceding ip address set with the
.Op Fl i ip-select
option or to all available addresses if none has been set. Can be given multiple
times.
.It Fl A Ar blessed-ip
Set an ip address in IPv4 or IPv6 or a net in CIDR notation to bless the network
for access to restricted resources.
.It Fl r Ar redirect-url
Set the URL that
.Nm
will redirect users to when the / address is requested via HTTP.
.It Fl d Ar chdir
Sets the directory
.Nm
will
.Xr chroot 2
to if ran as root or
.Xr chdir 2
to if ran as unprivileged user. Note that any accesslist files need to be
relative to and within that directory.
.It Fl u Ar user
User to run
.Nm
under after all operations that need privileges have finished.
.It Fl w Ar accesslist | Fl b Ar accesslist
If
.Nm
has been compiled with the
.B WANT_ACCESSLIST_BLACK
or
.Br WANT_ACCESSLIST_WHITE
options, this option sets the location of the accesslist.
.El
.Sh EXAMPLES
Start
.Nm
bound on UDP and TCP ports 6969 on IPv6 localhost.
.Dl # ./opentracker -i ::1 -p 6969 -P 6969
.Pp
Start
.Nm
bound on UDP port 6868 and TCP port 6868 on IPv4 localhost and allow
privileged access from the network 192.168/16 while redirecting
HTTP clients accessing the root directory, which is not covered by the
bittorrent tracker protocol, to https://my-trackersite.com/.
.Dl # ./opentracker -i 192.168.0.4 -p 6868 -P 6969 -A 192.168/16 -r https://my-trackersite.com/
The announce URLs are http://192.168.0.4:6868/announce and
udp://192.168.0.4:6868/announce respectively.
.Sh FILES
.Bl -tag -width indent
.It Pa opentracker.conf
The
.Nm
config file.
.El
.Sh SEE ALSO
.Xr opentracker.conf 4
.Pp
opentracker documentation
.Lk https://erdgeist.org/arts/software/opentracker
.Pp
Bittorrent tracker protocol
.Lk http://www.bittorrent.org/beps/bep_0015.html
.Sh
.Sh AUTHOR
.An Dirk Engling
.Aq Mt erdgeist@erdgeist.org .
.Sh LICENSE
This software is released under the Beerware License:
Permission is hereby granted, free of charge, to any person obtaining a copy of this software
and associated documentation files (the "Software"), to deal in the Software with the following
terms and conditions:
If you meet the author(s) someday, and you think this software is worth it, you can buy them
a beer in return.
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