Rationale: right now there seems to be no way for our bootstrap
status to dip under 100% once it has reached 100%. Thus, recording
broken connections after that point is useless, and wastes memory.
If at some point in the future we allow our bootstrap level to go
backwards, then we should change this rule so that we disable
recording broken connection states _as long as_ the bootstrap status
is 100%.
- We were reporting the _bottom_ N failing states, not the top N.
- With bufferevents enabled, we logged all TLS states as being "in
bufferevent", which isn't actually informative.
- When we had nothing to report, we reported nothing too loudly.
- Also, we needed documentation.
This code lets us record the state of any outgoing OR connection
that fails before it becomes open, so we can notice if they're all
dying in the same SSL state or the same OR handshake state.
More work is still needed:
- We need documentation
- We need to actually call the code that reports the failure when
we realize that we're having a hard time connecting out or
making circuits.
- We need to periodically clear out all this data -- perhaps,
whenever we build a circuit successfully?
- We'll eventually want to expose it to controllers, perhaps.
Partial implementation of feature 3116.
It's very easy for nodelist_add_node_family(sl,node) to accidentally
add 'node', and kind of hard to make sure that it omits it. Instead
of taking pains to leave 'node' out, let's instead make sure that we
always include it.
I also rename the function to nodelist_add_node_and_family, and
audit its users so that they don't add the node itself any longer,
since the function will take care of that for them.
Resolves bug 2616, which was not actually a bug.
Previously, we'd just take all the nodes in EntryNodes, see which
ones were already in the guard list, and add the ones that weren't.
There were some problems there, though:
* We'd add _every_ entry in EntryNodes, and add them in the order
they appeared in the routerlist. This wasn't a problem
until we added the ability to give country-code or IP-range
entries in the EntryNodes set, but now that we did, it is.
(Fix: We now shuffle the entry nodes before adding them; only
add up to 10*NumEntryGuards)
* We didn't screen EntryNodes for the Guard flag. That's okay
if the user has specified two or three entry nodes manually,
but if they have listed a whole subcontinent, we should
restrict ourselves to the entries that are currently guards.
(Fix: separate out the new guard from the new non-guard nodes,
and add the Guards first.)
* We'd prepend new EntryNodes _before_ the already configured
EntryNodes. This could lead to churn.
(Fix: don't prepend these.)
This patch also pre-screens EntryNodes entries for
reachableaddresses/excludenodes, even though we check for that
later. This is important now, since we cap the number of entries
we'll add.
Just looking at the "latest" consensus could give us a microdesc
consensus, if microdescs were enabled. That would make us decide
that every routerdesc was unlisted in the latest consensus and drop
them all: Ouch.
Fixes bug 3113; bugfix on 0.2.3.1-alpha.
We have an invariant that a node_t should have an md only if it has
a routerstatus. nodelist_purge tried to preserve this by removing
all nodes without a routerstatus or a routerinfo. But this left
nodes with a routerinfo and a microdesc untouched, even if they had
a routerstatus.
Bug found by frosty_un.
All of the routerset_contains*() functions return 0 if their
routerset_t argument is NULL. Therefore, there's no point in
doing "if (ExcludeNodes && routerset_contains*(ExcludeNodes...))",
for example.
This patch fixes every instance of
if (X && routerstatus_contains*(X,...))
Note that there are other patterns that _aren't_ redundant. For
example, we *don't* want to change:
if (EntryNodes && !routerstatus_contains(EntryNodes,...))
Fixes#2797. No bug here; just needless code.
Previously, we'd get a new descriptor for free when
public_server_mode() changed, since it would count as
affects_workers, which would call init_keys(), which would make us
regenerate a new descriptor. But now that we fixed bug 3263,
init_keys() is no longer necessarily a new descriptor, and so we
need to make sure that public_server_mode() counts as a descriptor
transition.
The issue was that we overlooked the possibility of reverse DNS success
at the end of connection_ap_handshake_socks_resolved(). Issue discovered
by katmagic, thanks!
Returning a tristate is needless here; we can just use the yielded
transport/proxy_type field to tell whether there's a proxy, and have
the return indicate success/failure.
Also, store the proxy_type in the or_connection_t rather than letting
it get out of sync if a configuration reload happens between launching
the or_connection and deciding what to say with it.
- const-ify some transport_t pointers
- Remove a vestigial argument to parse_bridge_line
- Make it compile without warnings on my laptop with
--enable-gcc-warnings
We were using strncpy before, which isn't our style for stuff like
this.
This isn't a bug, though: before calling strncpy, we were checking
that strlen(src) was indeed == HEX_DIGEST_LEN, which is less than
sizeof(dst), so there was no way we could fail to NUL-terminate.
Still, strncpy(a,b,sizeof(a)) is an idiom that we ought to squash
everyplace.
Fixes CID #427.
Using strncpy meant that if listenaddress were ever >=
sizeof(sockaddr_un.sun_path), we would fail to nul-terminate
sun_path. This isn't a big deal: we never read sun_path, and the
kernel is smart enough to reject the sockaddr_un if it isn't
nul-terminated. Nonetheless, it's a dumb failure mode. Instead, we
should reject addresses that don't fit in sockaddr_un.sun_path.
Coverity found this; it's CID 428. Bugfix on 0.2.0.3-alpha.
When we rejected a descriptor for not being the one we wanted, we
were letting the parsed descriptor go out of scope.
Found by Coverity; CID # 30.
Bugfix on 0.2.1.26.
(No changes file yet, since this is not in any 0.2.1.x release.)
I'm not one to insist on C's miserly stack limits, but allocating a
256K array on the stack is too much even for me.
Bugfix on 0.2.1.7-alpha. Found by coverity. Fixes CID # 450.
Every node_t has either a routerinfo_t or a routerstatus_t, so every
node_t *should* have a nickname. Nonetheless, let's make sure in
hex_digest_nickname_matches().
Should quiet CID 434.
This is a little error-prone when the local has a different type
from the parameter, and is very error-prone with both have the same
type. Let's not do this.
Fixes CID #437,438,439,440,441.
For some inexplicable reason, Coverity departs from its usual
standards of avoiding false positives here, and warns about all
sscanf usage, even when the formatting strings are totally safe.
Addresses CID # 447, 446.
Previously, fetch_from_buf_socks() might return 0 if there was still
data on the buffer and a subsequent call to fetch_from_buf_socks()
would return 1. This was making some of the socks5 unit tests
harder to write, and could potentially have caused misbehavior with
some overly verbose SOCKS implementations. Now,
fetch_from_buf_socks() does as much processing as it can, and
returns 0 only if it really needs more data. This brings it into
line with the evbuffer socks implementation.
We added this back in 0649fa14 in 2006, to deal with the case where
the client unconditionally sent us authentication data. Hopefully,
that's not needed any longer, since we now can actually parse
authentication data.
This change also requires us to add and use a pair of
allocator/deallocator functions for socks_request_t, instead of
using tor_malloc_zero/tor_free directly.
In the code as it stood, we would accept any number of socks5
username/password authentication messages, regardless of whether we
had actually negotiated username/password authentication. Instead,
we should only accept one, and only if we have really negotiated
username/password authentication.
This patch also makes some fields of socks_request_t into uint8_t,
for safety.
Multiple Bridge lines can point to the same one ClientTransportPlugin
line, and we can have multiple ClientTransportPlugin lines in our
configuration file that don't match with a bridge. We also issue a
warning when we have a Bridge line with a pluggable transport but we
can't match it to a ClientTransportPlugin line.
* Renamed transport_info_t to transport_t.
* Introduced transport_get_by_name().
* Killed match_bridges_with_transports().
We currently *don't* detect whether any bridges miss their transports,
of if any transports miss their bridges.
* Various code and aesthetic tweaks and English language changes.
A couple of places in control.c were using connection_handle_write()
to flush important stuff (the response to a SIGNAL command, an
ERR-level status event) before Tor went down. But
connection_handle_write() isn't meaningful for bufferevents, so we'd
crash.
This patch adds a new connection_flush() that works for all connection
backends, and makes control.c use that instead.
Fix for bug 3367; bugfix on 0.2.3.1-alpha.
libnatpmp-20110618 changed the API that tor-fw-helper used and for a time
tor-fw-helper could not build against the newest libnatpmp. This patch brings
support for libnatpmp to tor-fw-helper.
debug-level since it will be quite common. logged at both client
and server side. this step should help us track what's going on
with people filtering tor connections by our ssl habits.
This lets us make a lot of other stuff const, allows the compiler to
generate (slightly) better code, and will make me get slightly fewer
patches from folks who stick mutable stuff into or_options_t.
const: because not every input is an output!
Original message from bug3393:
check_private_dir() to ensure that ControlSocketsGroupWritable is
safe to use. Unfortunately, check_private_dir() only checks against
the currently running user… which can be root until privileges are
dropped to the user and group configured by the User config option.
The attached patch fixes the issue by adding a new effective_user
argument to check_private_dir() and updating the callers. It might
not be the best way to fix the issue, but it did in my tests.
(Code by lunar; changelog by nickm)
* Improved function documentation.
* Renamed find_bridge_transport_by_addrport() to
find_transport_by_bridge_addrport().
* Sanitized log severities we use.
* Ran check-spaces.
When we set a networkstatus in the non-preferred flavor, we'd check
the time in the current_consensus. But that might have been NULL,
which could produce a crash as seen in bug 3361.
George Kadianakis notes that if you give crypto_rand_int() a value
above INT_MAX, it can return a negative number, which is not what
the documentation would imply.
The simple solution is to assert that the input is in [1,INT_MAX+1].
If in the future we need a random-value function that can return
values up to UINT_MAX, we can add one.
Fixes bug 3306; bugfix on 0.2.2pre14.
When we added the check for key size, we required that the keys be
128 bytes. But RSA_size (which defers to BN_num_bytes) will return
128 for keys of length 1017..1024. This patch adds a new
crypto_pk_num_bits() that returns the actual number of significant
bits in the modulus, and uses that to enforce key sizes.
Also, credit the original bug3318 in the changes file.
UseBridges 1 now means "connect only to bridges; if you know no
bridges, don't make connections." UseBridges auto means "Use bridges
if they are known, and we have no EntryNodes set, and we aren't a
server." UseBridges 0 means "don't use bridges."
This merge was a bit nontrivial, since I had to write a new
node_is_a_configured_bridge to parallel router_is_a_configured_bridge.
Conflicts:
src/or/circuitbuild.c
options->DirPort is 0 in the unit tests, so
router_get_advertised_dir_port() would return 0 so we wouldn't pick a
dirport. This isn't what we want for the unit tests. Fixes bug
introduced in 95ac3ea594.
Previously, Tor would dereference a NULL pointer and crash if
lookup_last_hid_serv_request were called before the first call to
directory_clean_last_hid_serv_requests. As far as I can tell, that's
currently impossible, but I want that undocumented invariant to go away
in case I^Wwe break it someday.
An elusive compile-error (MingW-gcc v4.50 on Win_XP); a missing
comma (!) and a typo ('err_msg' at line 277 changed to 'errmsg').
Aso changed the format for 'err_code' at line 293 into a "%ld" to suppress
a warning. How did this go unnoticed for ~1 month? Btw. This is my 1st ever
'git commit', so it better work.
When we introduced NEED_KEY_1024 in routerparse.c back in
0.2.0.1-alpha, I forgot to add a *8 when logging the length of a
bad-length key.
Bugfix for 3318 on 0.2.0.1-alpha.
The patch for 3228 made us try to run init_keys() before we had loaded
our state file, resulting in an assert inside init_keys. We had moved
it too early in the function.
Now it's later in the function, but still above the accounting calls.
The conflicts were mainly caused by the routerinfo->node transition.
Conflicts:
src/or/circuitbuild.c
src/or/command.c
src/or/connection_edge.c
src/or/directory.c
src/or/dirserv.c
src/or/relay.c
src/or/rendservice.c
src/or/routerlist.c
The comment fixes are trivial. The defensive programming trick is to
tolerate receiving NULL inputs on the describe functions. That should
never actually happen, but it seems like the likeliest mistake for us
to make in the future.
Previously we did this nearer to the end (in the old_options &&
transition_affects_workers() block). But other stuff cares about
keys being consistent with options... particularly anything which
tries to access a key, which can die in assert_identity_keys_ok().
Fixes bug 3228; bugfix on 0.2.2.18-alpha.
Fixes part of #1297; bugfix on 48e0228f1e,
when circuit_expire_building was changed to assume that timestamp_dirty
was set when a circuit changed purpose to _C_REND_READY. (It wasn't.)
The previous attempt was incomplete: it told us not to publish a
descriptor, but didn't stop us from generating one. Now we treat an
absent OR port the same as not knowing our address. (This means
that when we _do_ get an OR port, we need to mark the descriptor
dirty.)
More attempt to fix bug3216.
This situation can happen easily if you set 'ORPort auto' and
'AccountingMax'. Doing so means that when you have no ORPort, you
won't be able to set an ORPort in a descriptor, so instead you would
just generate lots of invalid descriptors, freaking out all the time.
Possible fix for 3216; fix on 0.2.2.26-beta.
We had all the code in place to handle this right... except that we
were unconditionally opening a PF_INET socket instead of looking at
sa_family. Ow.
Fixes bug 2574; not a bugfix on any particular version, since this
never worked before.
Most instances were dead code; for those, I removed the assignments.
Some were pieces of info we don't currently plan to use, but which
we might in the future. For those, I added an explicit cast-to-void
to indicate that we know that the thing's unused. Finally, one was
a case where we were testing the wrong variable in a unit test.
That one I fixed.
This resolves bug 3208.
It used to mean "Force": it would tell tor-resolve to ask tor to
resolve an address even if it ended with .onion. But when
AutomapHostsOnResolve was added, automatically refusing to resolve
.onion hosts stopped making sense. So in 0.2.1.16-rc (commit
298dc95dfd), we made tor-resolve happy to resolve anything.
The -F option stayed in, though, even though it didn't do anything.
Oddly, it never got documented.
Found while fixing GCC 4.6 "set, unused variable" warnings.
On win64, sockets are of type UINT_PTR; on win32 they're u_int;
elsewhere they're int. The correct windows way to check a socket for
being set is to compare it with INVALID_SOCKET; elsewhere you see if
it is negative.
On Libevent 2, all callbacks take sockets as evutil_socket_t; we've
been passing them int.
This patch should fix compilation and correctness when built for
64-bit windows. Fixes bug 3270.
We used to regenerate our descriptor whenever we'd get a sighup. This
was caused by a bug in options_transition_affects_workers() that would
return true even if the options were exactly the same. Down the call
path we'd call init_keys(), which made us make a new descriptor which
the authorities would reject, and the node would subsequently fall out
of the consensus.
This patch fixes only the first part of this bug:
options_transition_affects_workers() behaves correctly now. The second
part still wants a fix.
tor_process_monitor_new can't currently return NULL, but if it ever can,
we want that to be an explicitly fatal error, without relying on the fact
that monitor_owning_controller_process's chain of caller will exit if it
fails.
When we configure a new bridge via the controller, don't wait up to ten
seconds before trying to fetch its descriptor. This wasn't so bad when
you listed your bridges in torrc, but it's dreadful if you configure
your bridges via vidalia.
Bumped the char maximum to 512 for HTTPProxyAuthenticator &
HTTPSProxyAuthenticator. Now stripping all '\n' after base64
encoding in alloc_http_authenticator.
Rename crypto_pk_check_key_public_exponent to crypto_pk_public_exponent_ok:
it's nice to name predicates s.t. you can tell how to interpret true
and false.
Fixed a trivial conflict where this and the ControlSocketGroupWritable
code both added different functions to the same part of connection.c.
Conflicts:
src/or/connection.c
