Check if the new pointer is the same as the old one: if it is, it's
probably a bug:
* the caller may have confused current and previous, or
* they may have forgotten to sr_srv_dup().
Putting NULL multiple times is allowed.
Part of 29706.
Refactor the shared random state's memory management so that it actually
takes ownership of the shared random value pointers.
Fixes bug 29706; bugfix on 0.2.9.1-alpha.
Stop leaking parts of the shared random state in the shared-random unit
tests. The previous fix in 29599 was incomplete.
Fixes bug 29706; bugfix on 0.2.9.1-alpha.
There are now separate modules for:
* the list of router descriptors
* the list of authorities and fallbacks
* managing authority certificates
* selecting random nodes
Bug description: For each descriptor, its revision counter is the OPE
ciphertext of the number of seconds since the start time of its SRV value.
This bug caused us to confuse the SRV start time in the middle of the lifetime
of a descriptor in some edge-cases, which caused descriptor rejects.
Bug cause: The bug occurs when we fetch a 23:00 consensus after
midnight (e.g. at 00:08 when not all dirauths have fetched the latest 00:00
consensus). In that case, the voting schedule (which was used for SRV start
time calculation) would return a valid-after past-midnight, whereas our
consensus would be pre-midnight, and that would confuse the SRV start time
computation which is used by HS revision counters (because we would reset the
start time of SRV, without rotating descriptors).
Bug fix: We now use our local consensus time to calculate the SRV start time,
instead of the voting schedule. The voting schedule does not work as originally
envisioned in this case, because it was created for voting by dirauths and not
for scheduling stuff on clients.
The following bug was causing many issues for this branch in chutney:
In sr_state_get_start_time_of_current_protocol_run() we were using the
consensus valid-after to calculate beginning_of_current_round, but we were
using time(NULL) to calculate the current_round slot. This was causing time
sync issues when the consensus valid-after and time(NULL) were disagreeing on
what the current round is. Our fix is to use the consensus valid-after in both
places.
This also means that we are not using 'now' (aka time(NULL)) anymore in that
function, and hence we can remove that argument from the function (and its
callers). I'll do this in the next commit so that we keep things separated.
Furthermore, we fix a unittest that broke.
