Adding tor_remove_file(filename) and refactoring tor_cleanup().
Removing CookieAuthFile and ExtORPortCookieAuthFile when tor_cleanup() is
called.
Fixes#23271.
Signed-off-by: Fernando Fernandez Mancera <ffernandezmancera@gmail.com>
Using absolute_msec requires a 64-bit division operation every time
we calculate it, which gets expensive on 32-bit architectures.
Instead, just use the lazy "monotime_coarse_get()" operation, and
don't convert to milliseconds until we absolutely must.
In this case, it seemed fine to use a full monotime_coarse_t rather
than a truncated "stamp" as we did to solve this problem for the
timerstamps in buf_t and packed_cell_t: There are vastly more cells
and buffer chunks than there are channels, and using 16 bytes per
channel in the worst case is not a big deal.
There are still more millisecond operations here than strictly
necessary; let's see any divisions show up in profiles.
Retry directory downloads when we get our first bridge descriptor
during bootstrap or while reconnecting to the network. Keep retrying
every time we get a bridge descriptor, until we have a reachable bridge.
Stop delaying bridge descriptor fetches when we have cached bridge
descriptors. Instead, only delay bridge descriptor fetches when we
have at least one reachable bridge.
Fixes bug 24367; bugfix on 0.2.0.3-alpha.
When entry_list_is_constrained() is true, guards_retry_optimistic()
always returns true.
When entry_list_is_constrained() is false,
options->UseBridges is always false,
therefore !options->UseBridges is always true,
therefore (!options->UseBridges || ...) is always true.
Cleanup after #24367.
Commit e80893e51b made tor call
hs_service_intro_circ_has_closed() when we mark for close a circuit.
When we cleanup intro points, we iterate over the descriptor's map of intro
points and we can possibly mark for close a circuit. This was problematic
because we would MAP_DEL_CURRENT() the intro point then free it and finally
mark for close the circuit which would lookup the intro point that we just
free in the map we are iterating over.
This can't be done and leads to a use-after-free because the intro point will
be returned successfully due to the fact that we are still in the loop
iterating. In other words, MAP_DEL_CURRENT() followed by a digest256map_get()
of the same object should never be done in the same loop.
Fixes#24595
Signed-off-by: David Goulet <dgoulet@torproject.org>
In KIST, we could have a small congestion window value than the unacked
packets leading to a integer overflow which leaves the tcp_space value to be
humongous.
This has no security implications but it results in KIST scheduler allowing to
send cells on a potentially saturated connection.
Found by #24423. Fixes#24590.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This function leaks memory when the event_base is freed before the
event itself fires. That's not harmful, but it's annoying when
trying to debug other memory leaks.
Fixes bug 24584; bugfix on 0.2.8.1-alpha.
When we didn't do this before, we'd have some still-reachable memory
warnings, and we'd find ourselves crashing when we tried to
reinitialize libevent.
Part of 24581 (don't crash when restarting Tor in-process)
