Some parts were hand-written, apparently.

Vitezslav Kriz authored 7 years ago and Petr Špaček committed 7 years ago

Config tests now have ability to run daemon with different arguments and
to check exit code.

Vitezslav Kriz authored 7 years ago and Petr Špaček committed 7 years ago

Arguments --keyfile, -k for managed mode
and
--keyfile-ro, -K for unmanaged (readonly) mode.

Automatic setting based on the file permission is removed because it was
confusing and could easily lead to state where automatic update does not
happen because of unexpected file permissions.

Check if folder is writeable was moved into Lua code.

Default unmanaged keyfile path can be specified at compile
time with option KEYFILE_DEFAULT. This default
configuration can be disabled in configuration file with
trust_anchors.keyfile_default = nil.

It is enabled by default.

RFC 6761 mandates functionality implemented by policy module, so it is
now loaded by default. Users with special needs can still unload the
module.

This is a followup on addition of trace callbacks in the resolver library,
to get rid of the Lua/C interfacing in daemon and unify it with the log tracing.
All modules can now install completion callback on the kr_request object that
will be called after the resolution is done.

Marek Vavruša authored 7 years ago and Marek Vavrusa committed 7 years ago

This implements worker coroutines in Lua to perform non-blocking I/O and do many things concurrently.
For example a file watcher can be now implemented as:

```
  local watcher = notify.opendir('/etc')
  watcher:add('hosts')

  -- Watch changes to /etc/hosts
  worker.coroutine(function ()
    for flags, name in watcher:changes() do
      for flag in notify.flags(flags) do
        print(name, notify[flag])
      end
    end
  end)
```

In order to make this work, the runtime uses the cqueues library which
can run coroutines concurrently, and return a file descriptor to poll on
if it's blocked. The worker takes that file descriptor and calls
`event.socket(pollfd, resume_callback)` so that libuv can wake up
the worker when its ready again.

The cqueues library is still optional, but if it's not present following stuff
won't work:

* worker.coroutine()
* worker.sleep()

Marek Vavruša authored 7 years ago and Petr Špaček committed 7 years ago

this surfaces the struct kr_cache through context variable,
it doesn't implement any API or documented interface for it,
so I just added a tests for the struct presence and introspection

Vicky Shrestha authored 7 years ago and Petr Špaček committed 7 years ago

This is useful when we do logging from the finish layer

This reverts commit 0a891eb6.

This allows debugging of what records were used for final answer.

This is useful in many troubleshooting scenarios when you want debug logs
just for a single request. It's going to expand on TRACE flag functionality
in the next PRs, so that special requests can be invoked with various tracers attached.

Currently this is only available in the C modules that can set the callback,
it's not called anywhere in the library yet.

this allows for changing request settings or performing other actions
just after the request is created.

Vitezslav Kriz authored 7 years ago and Petr Špaček committed 7 years ago

Check differences between real and monotonic time.
It clears cache when this diffrence changes since
last cache clear.

Vitezslav Kriz authored 7 years ago and Petr Špaček committed 7 years ago

Monotonic time from libuv function uv_now (wrapped in kr_now) is
used for query timeout, stats and RTT in reputation cache.

Cache, DNSSEC Validation and Cookies use real time.

Some RR type definitions present in IANA DNS parameters registry were
missing in kresd. This commit synchronizes the tables with IANA registry
as of 2017-12-08 13:20 UTC.

At the same time, this commit is
fixup! converted constant tables, support kres.type.TYPE1234
The mentioned commit accidentally removed NULL definition which broke TA
signaling module.

Vitezslav Kriz authored 7 years ago and Petr Špaček committed 7 years ago

This module is enabled by default, but disabled in Deckard tests.

Vitezslav Kriz authored 7 years ago and Petr Špaček committed 7 years ago

Also removed priming query from trust anchor module.
Updated deckard repository.

Also fixed improper promotion of `ffi` to global variable.

```
$ luacheck --codes daemon/lua/
Checking daemon/lua/config.lua                    OK
Checking daemon/lua/kres-gen.lua                  OK
Checking daemon/lua/kres.lua                      OK
Checking daemon/lua/sandbox.lua                   OK
Checking daemon/lua/trust_anchors.lua             OK
Checking daemon/lua/zonefile.lua                  OK

Total: 0 warnings / 0 errors in 6 files
```

The library now depends on libknot >= 2.4.0 (in Debian stable),
this allows us to remove a dead code and sed-ing of the kres.lua

Added a basic config tests to check that constants still work,
and basic interface to rrsets still works after the change.

The difficulty with using structs as constant tables is that access
to non-existent fields throws an error. This is difficult to handle
without wrapping every access in a pcall, for example in predict module:

```
error: /usr/local/lib/kdns_modules/predict.lua:34: 'struct rr_type' has no member named 'TYPE65535'
```

So I converted the constant tables into regular Lua tables,
and added a metatable for RR types to allow looking up unnamed types,
in the TYPE%d format. Looking up non-existent fields will now
return nil instead of throwing an error.

The config tests locked up on error as if error was raised from the
event callback, it would never reach the `quit()` statement, so
server would never close on error.

Added a script to make running these types of tests a little bit nicer
and to allow concurrent execution of config tests.

Added a test for the predict module, that fails on prediction
of unknown types:

```
error: /usr/local/lib/kdns_modules/predict.lua:34: 'struct rr_type' has no member named 'TYPE65535'
```

For now I didn't touch the generator to be correct on this line,
as we will probably want to change it after bumping minimal libknot
version.