Refreshing a stale RRset is similar to prefetching an RRset, so
reuse the existing code. When refreshing an RRset we need to clear
all db options related to serve-stale so that stale RRsets in cache
are ignored during the refresh.
We no longer need to set the "nodetach" flag, because the refresh
fetch is now a "fetch and forget". So we can detach from the client
in the query_send().
This code will break some serve-stale test cases, this will be fixed
in the successor commit.
TODO: add explanation why the serve-stale test cases fail.
Ondřej Surý [Mon, 27 Jun 2022 08:13:19 +0000 (10:13 +0200)]
Add a case-insensitive option directly to siphash 2-4 implementation
Formerly, the isc_hash32() would have to change the key in a local copy
to make it case insensitive. Change the isc_siphash24() and
isc_halfsiphash24() functions to lowercase the input directly when
reading it from the memory and converting the uint8_t * array to
64-bit (respectively 32-bit numbers).
Mark Andrews [Thu, 15 Sep 2022 06:04:43 +0000 (16:04 +1000)]
Add support for 'dohpath' to SVCB (and HTTPS)
dohpath is specfied in draft-ietf-add-svcb-dns and has a value
of 7. It must be a relative path (start with a /), be encoded
as UTF8 and contain the variable dns ({?dns}).
Tony Finch [Tue, 20 Sep 2022 13:32:01 +0000 (14:32 +0100)]
Avoid signed integer overflow in isc_resource_setlimit()
On systems with signed rlim_t the old code calculated its maximum
value by shifting 1 into the sign bit, which is undefined behaviour.
Avoid the bug by using an unsigned shift.
Be more patient when stopping servers in the system tests
When the TCP test is run on the busy server, the server might take a
while to wind the server down because it might still be processing all
that 300k invalid XFR requests.
Increate the rncd wait time to 120 seconds, the SIGTERM time to 300
seconds, and reduce the time to wait for ans servers from 1200 second
to just 120 seconds.
The dns__nta_shutdown() could be run from different threads and it was
accessing nta->timer unlocked. Don't check and stop the timer from
dns__nta_shutdown() directly, but leave it for the async callback.
Because the dns_zonemgr_create() was run before the loopmgr was started,
the isc_ratelimiter API was more complicated that it had to be. Move
the dns_zonemgr_create() to run_server() task which is run on the main
loop, and simplify the isc_ratelimiter API implementation.
The isc_timer is now created in the isc_ratelimiter_create() and
starting the timer is now separate async task as is destroying the timer
in case it's not launched from the loop it was created on. The
ratelimiter tick now doesn't have to create and destroy timer logic and
just stops the timer when there's no more work to do.
This should also solve all the races that were causing the
isc_ratelimiter to be left dangling because the timer was stopped before
the last reference would be detached.
Mark Andrews [Thu, 29 Sep 2022 02:12:58 +0000 (12:12 +1000)]
Create a key directory in /tmp
Access to the source tree is not available with oss_fuzz. Have
fuzz/dns_message_checksig build and populate a key directory for
the fuzzer to use. This contains a key pair and a zone file which
has the public key from the key pair. Clean it up on shutdown.
Tony Finch [Mon, 13 Jun 2022 11:00:01 +0000 (12:00 +0100)]
Improve DBC in isc_mem_free
Unlike standard free(), isc_mem_free() is not a no-op when passed a
NULL pointer. For size accounting purposes it calls sallocx(), which
crashes when passed a NULL pointer. To get more helpful diagnostics,
REQUIRE() that the pointer is not NULL so that when the programmer
makes a mistake they get a backtrace that shows what went wrong.
Add developer documentation on the netmgr callbacks
Extra care must be taken when executing the callbacks to prevent the
deadlocks on the caller's side. Add a paragraph that addresses when we
can and when we cannot call the callbacks directly.
Call the isc__nm_udp_send() callbacks asynchronously on shutdown
The isc__nm_udp_send() callback would be called synchronously when
shutting down or when the socket has been closed. This could lead to
double locking in the calling code and thus those callbacks needs to be
called asynchronously.
Test dynamic update forwarding when using a TLS-enabled primary
Add several test cases in the 'upforwd' system test to make sure
that different scenarios of Dynamic DNS update forwarding are
tested, in particular when both the original and forwarded requests
are over Do53, or DoT, or they use different transports.
Fix dynamic update forwarding when using a TLS-enabled primary
Now that the 'dns_request' supports using TLS transport, implement
dynamic update forwarding using DoT when the primary server is
configured to use a TLS transport.
Previously, when using such configuration, the dynamic update forwarding
feature was broken.
Add autoconf option to enable memory leak detection in libraries
There's a known memory leak in the engine_pkcs11 at the time of writing
this and it interferes with the named ability to check for memory leaks
in the OpenSSL memory context by default.
Add an autoconf option to explicitly enable the memory leak detection,
and use it in the CI except for pkcs11 enabled builds. When this gets
fixed in the engine_pkc11, the option can be enabled by default.
Check the libuv, OpenSSL and libxml2 memory context on exit
As we can't check the deallocations done in the library memory contexts
by default because it would always fail on non-clean exit (that happens
on error or by calling exit() early), we just want to enable the checks
to be done on normal exit.
The libxml2 library provides a way to replace the default allocator with
user supplied allocator (malloc, realloc, strdup and free).
Create a memory context specifically for libxml2 to allow tracking the
memory usage that has originated from within libxml2. This will provide
a separate memory context for libxml2 to track the allocations and when
shutting down the application it will check that all libxml2 allocations
were returned to the allocator.
Additionally, move the xmlInitParser() and xmlCleanupParser() calls from
bin/named/main.c to library constructor/destructor in libisc library.
The OpenSSL library provides a way to replace the default allocator with
user supplied allocator (malloc, realloc, and free).
Create a memory context specifically for OpenSSL to allow tracking the
memory usage that has originated from within OpenSSL. This will provide
a separate memory context for OpenSSL to track the allocations and when
shutting down the application it will check that all OpenSSL allocations
were returned to the allocator.
The libuv library provides a way to replace the default allocator with
user supplied allocator (malloc, realloc, calloc and free).
Create a memory context specifically for libuv to allow tracking the
memory usage that has originated from within libuv. This requires
libuv >= 1.38.0 which provides uv_library_shutdown() function that
assures no more allocations will be made.
Check for working __builtin_mul_overflow() implementation
Instead of using generic HAVE_BUILTIN_OVERFLOW, we need to check whether
the overflow functions actually work as there was a bug in GCC that it
would not detect mul overflow when compiled with `-m32` option without
optimizations and the bug was fixed only for GCC 6.5+ and 7.3+/8+.
For further details see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82274
Make the debugging flags local to the memory context
Previously, the isc_mem_debugging would be single global variable that
would affect the behavior of the memory context whenever it would be
changed which could be after some allocation were already done.
Change the memory debugging options to be local to the memory context
and immutable, so all allocations within the same memory context are
treated the same.
By bumping the minimum libuv version to 1.34.0, it allows us to remove
all libuv shims we ever had and makes the code much cleaner. The
up-to-date libuv is available in all distributions supported by BIND
9.19+ either natively or as a backport.
Mark Andrews [Thu, 15 Sep 2022 09:18:53 +0000 (19:18 +1000)]
Convert DST_ALG defines to enum and group HMAC algorithms
The HMACs and GSSAPI are just using unallocated values.
Moving them around shouldn't cause issues.
Only the dnssec system test knew the internal number in use for hmacmd5.
Mark Andrews [Fri, 23 Sep 2022 07:35:21 +0000 (17:35 +1000)]
Check that changing the TSIG key is successful
Switch the primary to require 'next_key' for zone transfers then
update the catalog zone to say to use 'next_key'. Next update the
zones contents then check that those changes are seen on the
secondary.
Mark Andrews [Fri, 23 Sep 2022 06:52:44 +0000 (16:52 +1000)]
Check that primary key names have not changed
When looking for changes in a catalog zone member zone we need to
also check if the TSIG key name associated with a primary server
has be added, removed or changed.
Fix stack-use-after-scope in dns_message_checksig test
Previously stack with buffer for test dns message went out of scope
before the message was processed. For fuzz testing its better to avoid
allocation, so let's avoid allocations completely and use simplest
possible static buffer.
Evan Hunt [Wed, 17 Aug 2022 20:39:38 +0000 (13:39 -0700)]
change ISC__BUFFER macros to inline functions
previously, when ISC_BUFFER_USEINLINE was defined, macros were
used to implement isc_buffer primitives (isc_buffer_init(),
isc_buffer_region(), etc). these macros were missing the DbC
assertions for those primitives, which made it possible for
coding errors to go undetected.
adding the assertions to the macros caused compiler warnings on
some platforms. therefore, this commit converts the ISC__BUFFER
macros to static inline functions instead, with assertions included,
and eliminates the non-inline implementation from buffer.c.
the --enable-buffer-useinline configure option has been removed.
Petr Menšík [Mon, 26 Sep 2022 11:52:20 +0000 (13:52 +0200)]
Simplify allowing warnings during ARM build
RHEL8 Sphinx does not support all features used in ARM building. But
with few emitted warnings it can build the documentation fine. Simplify
warnings acceptance by allowing make doc SPHINX_W=''.
Petr Menšík [Sat, 24 Sep 2022 18:22:20 +0000 (14:22 -0400)]
Compatibility for building ARM on older sphinx
Make documentation building successful even on RHEL9 sphinx 3.4.3. It
does not like case-insensitive matching of terms, so provide lowercase
text description with Uppercase word reference.
Ondřej Surý [Wed, 2 Mar 2022 10:48:26 +0000 (11:48 +0100)]
Add dns_message_checksig() fuzzer
dns_message_checksig is called in a number of scenarios
* on requests and responses
* on multiple opcodes
* with and without signatures
* with TSIG signatures
* with SIG(0) signatures
* with and without configured TSIG keys
* with and without KEY records being present
* signing performed now, in the future and in the past
we use the first two octets of the seed to configure the calling
environment with the remainder of the seed being the rdata of the
TSIG/SIG(0) record.
projects / thirdparty / bind9.git / log
