The directory_fetches_from_authorities() is used to know if a client or relay
should fetch data from an authority early in the boot process.
We had a condition in that function that made a relay trigger that fetch if it
didn't know its address (so we can learn it). However, when this is called,
the address discovery has not been done yet so it would always return true for
a relay.
Furthermore, it would always trigger a log notice that the IPv4 couldn't be
found which was inevitable because the address discovery process has not been
done yet (done when building our first descriptor).
It is also important to point out that starting in 0.4.5.1-alpha, asking an
authority for an address is done during address discovery time using a one-hop
circuit thus independent from the relay deciding to fetch or not documents
from an authority.
Small fix also is to reverse the "IPv(4|6)Only" flag in the notice so that if
we can't find IPv6 it would output to use IPv4Only.
Fixes#40300
Signed-off-by: David Goulet <dgoulet@torproject.org>
Fix a bug introduced in 94b56eaa75 which
overwrite the connection message line.
Furthermore, improve how we generate that line by using a smartlist and change
the format so it is clearer of what is being rejected/detected and, if
applicable, which option is disabled thus yielding no stats.
Closes#40308
Signed-off-by: David Goulet <dgoulet@torproject.org>
No behavior change except for logging. This is so the connection related
statistics are in the right object.
Related to #40253
Signed-off-by: David Goulet <dgoulet@torproject.org>
This is a new detection type which is that a relay can now control the rate of
client connections from a single address.
The mechanism is pretty simple, if the rate/burst is reached, the address is
marked for a period of time and any connection from that address is denied.
Closes#40253
Signed-off-by: David Goulet <dgoulet@torproject.org>
The IPFire people provide a tool that collects data from several
top-level sources, combines it into a single database, and annotates
it with optional overrides. This tool transforms the "dump" format
of their database into the form Tor expects.
When trying to find our address to publish, we would log notice if we couldn't
find it from the cache but then we would look at the suggested cache (which
contains the address from the authorities) in which we might actually have the
address.
Thus that log notice was misplaced. Move it down after the suggested address
cache lookup.
Closes#40300
Signed-off-by: David Goulet <dgoulet@torproject.org>
Relay will always publish 0 as DirPort value in their descriptor from now on
except authorities.
Related to #40282
Signed-off-by: David Goulet <dgoulet@torproject.org>
Regular relays are about to get their DirPort removed so that reachability
test is not useful anymore
Authorities will still use the DirPort but because network reentry towards
their DirPort is now denied network wide, this test is not useful anymore and
so it should simply be considered reachable at all time.
Part of #40282
Signed-off-by: David Goulet <dgoulet@torproject.org>
This bug made the pipeline fail. It basically tries to access a service we just
freed because it's still on the service list.
It only occurs about once every 10 tests and it looks like this:
$ ./src/test/test hs_control/hs_control_add_onion_helper_add_service
hs_control/hs_control_add_onion_helper_add_service: [forking] =================================================================
==354311==ERROR: AddressSanitizer: heap-use-after-free on address 0x613000000940 at pc 0x55a159251b03 bp 0x7ffc6abb5b30 sp 0x7ffc6abb5b28
READ of size 8 at 0x613000000940 thread T0
^[[A
#0 0x55a159251b02 in hs_service_ht_HT_FIND_P_ src/feature/hs/hs_service.c:153
#1 0x55a159251b02 in hs_service_ht_HT_FIND src/feature/hs/hs_service.c:153
#2 0x55a159251b02 in find_service src/feature/hs/hs_service.c:175
#3 0x55a159251c2c in register_service src/feature/hs/hs_service.c:188
#4 0x55a159262379 in hs_service_add_ephemeral src/feature/hs/hs_service.c:3811
#5 0x55a158e865e6 in test_hs_control_add_onion_helper_add_service src/test/test_hs_control.c:847
#6 0x55a1590fe77b in testcase_run_bare_ src/ext/tinytest.c:107
#7 0x55a1590fee98 in testcase_run_forked_ src/ext/tinytest.c:201
#8 0x55a1590fee98 in testcase_run_one src/ext/tinytest.c:267
#9 0x55a1590ffb06 in tinytest_main src/ext/tinytest.c:454
#10 0x55a158b1b1a4 in main src/test/testing_common.c:420
#11 0x7f7f06f8dd09 in __libc_start_main ../csu/libc-start.c:308
#12 0x55a158b21f69 in _start (/home/f/Computers/tor/mytor/src/test/test+0x372f69)
0x613000000940 is located 64 bytes inside of 344-byte region [0x613000000900,0x613000000a58)
freed by thread T0 here:
#0 0x7f7f0774ab6f in __interceptor_free ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:123
#1 0x55a158e86508 in test_hs_control_add_onion_helper_add_service src/test/test_hs_control.c:838
#2 0x55a1590fe77b in testcase_run_bare_ src/ext/tinytest.c:107
#3 0x55a1590fee98 in testcase_run_forked_ src/ext/tinytest.c:201
#4 0x55a1590fee98 in testcase_run_one src/ext/tinytest.c:267
#5 0x55a1590ffb06 in tinytest_main src/ext/tinytest.c:454
#6 0x55a158b1b1a4 in main src/test/testing_common.c:420
#7 0x7f7f06f8dd09 in __libc_start_main ../csu/libc-start.c:308
previously allocated by thread T0 here:
#0 0x7f7f0774ae8f in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
#1 0x55a15948b728 in tor_malloc_ src/lib/malloc/malloc.c:45
#2 0x55a15948b7c0 in tor_malloc_zero_ src/lib/malloc/malloc.c:71
#3 0x55a159261bb5 in hs_service_new src/feature/hs/hs_service.c:4290
#4 0x55a159261f49 in hs_service_add_ephemeral src/feature/hs/hs_service.c:3758
#5 0x55a158e8619f in test_hs_control_add_onion_helper_add_service src/test/test_hs_control.c:832
#6 0x55a1590fe77b in testcase_run_bare_ src/ext/tinytest.c:107
#7 0x55a1590fee98 in testcase_run_forked_ src/ext/tinytest.c:201
#8 0x55a1590fee98 in testcase_run_one src/ext/tinytest.c:267
#9 0x55a1590ffb06 in tinytest_main src/ext/tinytest.c:454
#10 0x55a158b1b1a4 in main src/test/testing_common.c:420
#11 0x7f7f06f8dd09 in __libc_start_main ../csu/libc-start.c:308
SUMMARY: AddressSanitizer: heap-use-after-free src/feature/hs/hs_service.c:153 in hs_service_ht_HT_FIND_P_
Shadow bytes around the buggy address:
0x0c267fff80d0: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa
0x0c267fff80e0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c267fff80f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c267fff8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c267fff8110: 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa
=>0x0c267fff8120: fd fd fd fd fd fd fd fd[fd]fd fd fd fd fd fd fd
0x0c267fff8130: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c267fff8140: fd fd fd fd fd fd fd fd fd fd fd fa fa fa fa fa
0x0c267fff8150: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c267fff8160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c267fff8170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==354311==ABORTING
[Lost connection!]
[hs_control_add_onion_helper_add_service FAILED]
1/1 TESTS FAILED. (0 skipped)
Now that v2 is off the table, 'rend_cache_lookup_result' is useless in
connection_ap_handle_onion() because it can only take the ENOENT value. Let's
remove that helper variable and handle the ENOENT case specifically when we
check the cache.
Also remove the 'onion_address' helper variable.
With v2 support for HSFETCH gone, we only support v3 addresses. We don't
support v2 descriptor IDs anymore and hence we can remove that code.
The code removed would ensure that if a v2 descriptor ID was provided, the user
also had to provide HSDirs explicitly.
In the v3 case, the code should work even if no HSDirs are provided, and Tor
would find the HSDirs itself.
For a user using "HiddenServiceVersion 2", a log warning is emitted indicating
that v2 is now obsolete instead of a confusing message saying that the version
is not supported.
Also, if an introduction point gets a legacy (v2) ESTABLISH_INTRO, we'll
simply close the circuit without emitting a protocol warning log onto the
relay.
Related to #40266
Signed-off-by: David Goulet <dgoulet@torproject.org>
We still keep v2 rendezvous stats since we will allow them until the network
has entirely phased out.
Related to #40266
Signed-off-by: David Goulet <dgoulet@torproject.org>
This is unfortunately massive but both functionalities were extremely
intertwined and it would have required us to actually change the HSv2 code in
order to be able to split this into multiple commits.
After this commit, there are still artefacts of v2 in the code but there is no
more support for service, intro point and HSDir.
The v2 support for rendezvous circuit is still available since that code is
the same for the v3 and we will leave it in so if a client is able to
rendezvous on v2 then it can still transfer traffic. Once the entire network
has moved away from v2, we can remove v2 rendezvous point support.
Related to #40266
Signed-off-by: David Goulet <dgoulet@torproject.org>
It can be called with strings that should have been
length-delimited, but which in fact are not. This can cause a
CPU-DoS bug or, in a worse case, a crash.
Since this function isn't essential, the best solution for older
Tors is to just turn it off.
Fixes bug 40286; bugfix on 0.2.2.1-alpha when dump_desc() was
introduced.
