Local tests with tracker and peers on same machine

[chrswk]

Hey

I'm trying to use a Java BT library that supports UDP trackers together with udpt. All of this is running locally on one machine as part of an automated test suite.

udpt is started with the following config:

mode = "dynamic"
log_level = "trace"

[udp]
announce_interval = 30
bind_address = "127.0.0.1:6969"

Torrents are generated with announce key:

udp://127.0.0.1:6969/announce

During the test, two BT runtimes are started with listening ports 6892 and 6893, both generate a couple of torrents using the announce value above and then try to seed/leech these torrents. I see the BT library (atomashpolskiy/bt) trying to contact the tracker with start/query events, but all requests time out.

udpt does not print out anything in it's log, but maybe that's because nothing actually reaches it.

I'm a bit lost as to why this does not work, but it may as well be something basic that I'm missing with how BT/torrents/trackers work. For example, I don't understand if /announce should be in the tracker URL (but removing it does not change the outcome), or if udpt works when bound to a loopback address.

Maybe someone can give me some hints.

Thanks
Chris