[tor-bugs] #31285 [Circumvention/Snowflake]: Broswers accumulate permanently open UDP sockets over time

[Tor Bug Tracker & Wiki]

#31285: Broswers accumulate permanently open UDP sockets over time
---------------------------------+-----------------------------------------
 Reporter:  cypherpunks          |          Owner:  (none)
     Type:  defect               |         Status:  new
 Priority:  Medium               |      Component:  Circumvention/Snowflake
  Version:                       |       Severity:  Normal
 Keywords:  snowflake-           |  Actual Points:
  webextension                   |
Parent ID:                       |         Points:
 Reviewer:                       |        Sponsor:
---------------------------------+-----------------------------------------
 After running tests with both Firefox and Chrome for a couple of days (see
 ticket:31278), my Windows process status utility shows that both browsers
 have accumulated a bunch of open UDP sockets, proportional to the number
 of clients they've served so far. Once opened, the UDP sockets stay
 allocated by the browser's process until I close the corresponding static
 page tab or turn off the addon. So far, Firefox has created 64 sockets (32
 each IPv4 & v6) while Chrome has only 14 (9 v4 & 5 v6) due to the Chrome
 client hanging bug reported earlier. Each time a new client is served,
 more sockets are created and never closed.

 Not a problem normally, they're not a scarce resource, but if you leave a
 browser open for weeks or months at a time they'll really add up,
 especially once Snowflake gets more popular and the number of clients
 served per day increases.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31285>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online