This fixes a serious bug in our hsdir set change logic:
We used to add nodes in the list of previous hsdirs everytime we
uploaded to a new hsdir and we only cleared the list when we built a new
descriptor. This means that our prev_hsdirs list could end up with 7
hsdirs, if for some reason we ended up uploading our desc to 7 hsdirs
before rebuilding our descriptor (e.g. this can happen if the set of
hsdirs changed).
After our previous hdsir set had 7 nodes, then our old algorithm would
always think that the set has changed since it was comparing a smartlist
with 7 elements against a smartlist with 6 elements.
This commit fixes this bug, by clearning the prev_hsdirs list before we
upload to all hsdirs. This makes sure that our prev_hsdirs list always
contains the latest hsdirs!
Our logic for detecting hsdir set changes was needlessly compicated: we
had to sort smartlists and compare them.
Instead, we can simplify things by employing the following logic:
"We should reupload our descriptor if the latest HSDir set contains
nodes that were not previously there"
Since we can't be sure that we can unlink enough files on windows
here, let's let the number of permitted entries grow huge if it
really must.
We do this by letting the storagedir hold lots of entries, but still
trying to keep the number of entries under the configured limit. We
also have to tell consdiffmgr not to freak out if it can't actually
remove enough entries.
Part of a fix for bug 22752
Some parentheses were missing making the rend_max_intro_circs_per_period()
return a lower value than it was suppose to.
The calculation is that a service at most will open a number of intro points
that it wants which is 3 by default or HiddenServiceNumIntroductionPoints. Two
extra are launched for performance reason. Finally, this can happen twice for
two descriptors for the current and next time period.
From:
2 * n_intro_wanted + 2
...which resulted in 8 for 3 intro points, this commit fixes it to:
(n_intro_wanted + 2) * 2
... resulting in 12 possible intro point circuit which is the correct maximum
intro circuit allowed per period.
Last, this commit rate limits the the log message if we ever go above that
limit else over a INTRO_CIRC_RETRY_PERIOD, we can print it often!
Fixes#22159
Signed-off-by: David Goulet <dgoulet@torproject.org>
Since ssize_t is signed and might be 64 bits, we should use
tt_i64_op to make sure it's positive. Otherwise, if it is negative,
and we use tt_u64_op, we'll be treating it as a uint64_t, and we
won't detect negative values.
This fixes CID 1416338 and 1416339. Bug not in any released Tor.
That check was wrong:
a) We should be making sure that the size of `key` is big enough before
proceeding, since that's the buffer that we would overread with the
tor_memeq() below.
The old check used to check that `req_key_str` is big enough which is
not right, since we won't read deep into that buffer.
The new check makes sure that `key` has enough size to survive the
tor_memeq(), and if not it moves to the next element of the strmap.
b) That check shouldn't be a BUG since that strmap contains
variable-sized elements and we should not be bugging out if we happen
to compare a small sized element (v2) to a bigger one (v3).
This way, we can clear off the directory requests from our cache and thus
allow the next client to query those HSDir again at the next SOCKS connection.
Signed-off-by: David Goulet <dgoulet@torproject.org>
v3 client now cleans up the HSDir request cache when a connection to a service
was successful.
Closes#23308
Signed-off-by: David Goulet <dgoulet@torproject.org>
We removed this documentation in 607724c696, when we removed
Naming Authoritative Directories, but actually this file is still
used by authorities to indicate rejected and invalid fingerprints.
Closes ticket 21148.
We used to not copy the state which means that after HUP we would forget
if we are in overlap mode or not. That caused bugs where the service
would enter overlap mode twice, and rotate its descs twice, causing all
sorts of bugs.
Apart from the fact that a newly allocated service doesn't have descriptors
thus the move condition can never be true, the service needs the descriptor
signing key to cross-certify the authentication key of each intro point so we
need to move the descriptors between services and not only the intro points.
Fixes#23056
Signed-off-by: David Goulet <dgoulet@torproject.org>
We refactor the descriptor reupload logic to be similar to the v2 logic
where we update a global 'consider_republishing_rend_descriptors' flag
and then we use that to check for hash ring changes during the global
hidden service callbacks.
This fixes bugs where we would inspect the hash ring immediately as we
receive new dirinfo (e.g. consensus) but before running the hidden
service housekeeping events. That was leaving us in an inconsistent
state wrt hsdir indices and causing bugs all around.
