This function does a nonfatal assertion to make sure that a machine
is not registered twice, but Tobias Pulls found a case where it
happens. Instead, make the function exit early so that it doesn't
cause a remotely triggered memory leak.
Fixes bug 33619; bugfix on 0.4.0.1-alpha. This is also tracked as
TROVE-2020-004.
Stop forcing all non-SOCKSPorts to prefer IPv6 exit connections.
Instead, prefer IPv6 connections by default, but allow users to change
their configs using the "NoPreferIPv6" port flag.
Fixes bug 33608; bugfix on 0.4.3.1-alpha.
For a bridge configured with a pluggable transport, the transport name is
used, with the IP address, for the GeoIP client cache entry.
However, the DoS subsystem was not aware of it and always passing NULL when
doing a lookup into the GeoIP cache.
This resulted in bridges with a PT are never able to apply DoS defenses for
newly created connections.
Fixes#33491
Signed-off-by: David Goulet <dgoulet@torproject.org>
Allow the "practracker" coding best practices checking script to read
unicode files, when using Python 2.
We made the script use unicode literals in 0.4.3.1-alpha, but didn't
change the codec for opening files.
Fixes bug 33374; bugfix on 0.4.3.1-alpha.
Closing these file descriptors can hide sanitiser logs.
Instead, flush the logs before tor exits, using fsync().
Some Windows environments don't have fsync(), so we check
for it at compile time.
Fixes bug 33087; bugfix on 0.4.1.6.
This patch ensures that we always lowercase the BridgeDistribution from
torrc in descriptors before submitting it.
See: https://bugs.torproject.org/32753
Conflicts:
doc/tor.1.txt
src/app/config/config.c
src/app/config/or_options_st.h
src/core/mainloop/connection.h
Between 042 and 043, the dirauth options were modularized so this merge commit
address this by moving the AuthDirRejectUncompressedRequests to the module
along with a series of accessors.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Authorities were never sending back 503 error code because by design they
should be able to always answer directory requests regardless of bandwidth
capacity.
However, that recently backfired because of a large number of requests from
unknown source using the DirPort that are _not_ getting their 503 code which
overloaded the DirPort leading to the authority to be unable to answer to its
fellow authorities.
This is not a complete solution to the problem but it will help ease off the
load on the authority side by sending back 503 codes *unless* the connection
is from a known relay or an authority.
Fixes#33029
Signed-off-by: David Goulet <dgoulet@torproject.org>
When the ONION_CLIENT_AUTH_REMOVE command is given to tor, now also remove the
descriptor associated with the client authorization credentials.
Fixes#33148
Signed-off-by: David Goulet <dgoulet@torproject.org>
The "once" flag makes tor_bug_occurred_() say that future instances
of the warning will be suppressed -- but that's not something that
BUG() does. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
When we added the ACTIVE and DORMANT virtual signals, we taught the
signal command to handle them, but we didn't teach SIGNAL event to
report them.
To solve this problem and prevent it from recurring, this patch
revises the implementation of control_event_signal() to use the same
signal_table that handle_control_signal() uses. This way, the two
controller commands can't become out of sync.
Fixes bug 33104; bugfix on 0.4.0.1-alpha.
Fixes bug 32673; bugfix on 0.3.0.4-alpha. We introduced these
checks in ee5471f9aa to help diagnose 21369, but we used "-1"
when "TOR_TLS_ERROR_MISC" would have been correct. Found by opara.
I don't think that this is actually getting triggered in the wild,
but if it were, it could cause nasty behavior: spurious
WANTREAD/WANTWRITE returns have a way of turning into CPU-eating
busy-loops.
We introduced these BUG() checks in b0ddaac074 to prevent a
recurrence of bug 23690. But there's a report of the BUG() message
getting triggered and filling up the disk. Let's change it to
IF_BUG_ONCE().
Fixes bug 33093; bugfix on 0.3.2.2-alpha.
Stop allowing failures on the Travis CI stem tests job. It looks like
all the stem hangs we were seeing are now fixed, but let's make sure we
see them if they happen again.
Closes ticket 33075.
Make Tor clients tell dual-stack exits that they prefer IPv6
connections.
This change is equivalent to setting the PreferIPv6 flag on
SOCKSPorts (and most other listener ports). Tor Browser has
been setting this flag for some time, and we want to remove a
client distinguisher at exits.
Also update the man page, putting all the IP flags in their
non-default forms.
Closes ticket 32637.
* ticket 32695 removed networkstatus_consensus_has_ipv6(),
keep that change in master.
* ticket 20218 modifies the function name and comment for
routerstatus_has_visibly_changed(), keep that change
in ticket20218_rebased_squashed.
We already check if there are invalid values in
check_bridge_distribution_setting() and reject the value if that is the
case. We can therefore only have strings of [A-Z] | [a-z] | [0-9] | '-'
| '_' here which is according to the directory specification.
See: https://bugs.torproject.org/32753
The variable lenght cells are handled directly by
channel_tls_handle_var_cell() from an OR connection reading its inbuf. The
channel var cell handler (agnostic) was never used.
Closes#32892
Signed-off-by: David Goulet <dgoulet@torproject.org>
We hit this assertion with bug 32868, but I'm stymied figuring out
how we wound up with a routerstatus like this. This patch is a
diagnostic to attempt to figure out what is going on, and to avoid a
crash in the meantime.
When practracker is disabled, its output will be empty. We don't
want that happening during our tests.
Fixes bug 32705; bugfix on 0.4.2.1-alpha, when test_practracker.sh
was introduced.
When we updated main.c to use the same entry points as tor_api.h, we
didn't update ntmain.c. This led to bugs as the two got out of
sync.
There are two calls that we drop in this patch: first, I drop the
call to set_main_thread(), since that's redundant with the init
function in compat_winthreads.c (but see #32884). Second, I drop
the check for CMD_RUN_TOR: I'll add that back with a subsequent
commit.
Closes ticket 32883.
Allow calls to dup() which was introduced in commit a22fbab986.
From a security perspective, I don't think this should impact the
security of the sandbox significantly. As far as I can tell, there
is nothing an adversary can do with a duplicated FD that can't be
done with the original.
We stopped looking at this option in 85cf6dcba3, back when we
implemented the minimal pieces of prop275. Since then, we've had
code to validate and adjust this option, and to give it a different
value in testing networks, but the option hasn't actually done
anything.
We can safely mark it as OBSOLETE, since doing so does not make any
old configuration get rejected.
Closes ticket 32807.
With v3, the "pending_final_cpath" of a circuit is always NULL which means
that for v3, established client rendezvous circuit waiting for the intro point
to ACK, will always end up timing out quickly.
This can increase the delays to which you connect to a service since in order
to succeed, the rendezvous circuit needs to fully established
(CIRCUIT_PURPOSE_C_REND_JOINED) within the cutoff of the introduction circuit
as well which is these days around 2-3 seconds.
Fixes#32021
Signed-off-by: David Goulet <dgoulet@torproject.org>
