At some point in time, internal non-public functions were prefixed with
`ares__` where as functions that may become public were prefixed with
just `ares_`. This was never very consistent. Organizing the code better
typically provides more benefit in this way, which we've made great
progress on.
All non-static symbols must contain the `ares_` prefix, and that should
be more than sufficient in preventing any sort of issues.
Authored-By: Brad House (@bradh352)
We modified the include path with recent changes, that isn't good for
OSS-Fuzz. Lets make the path relative for including some semi-public
headers to allow OSS-Fuzz to build again.
Fix By: Brad House (@bradh352)
The test case changes introduced a memory leak in the test itself
(not in c-ares). Fix this memory leak. Also move prior fuzzing
information into the new fuzzing document.
Fix By: Brad House (@bradh352)
The coverage of the fuzzer is fairly low as it was only testing the
parsing, not trying to read the data from the datastructure or writing
it back out as a DNS message. Lets extend, and also provide a
FUZZING.md to help people new to fuzzing get up and running.
Authored-By: Brad House (@bradh352)
The legacy c-ares parsers such as ares_parse_txt_reply() and
ares_parse_srv_reply() historically all used different logic and
parsing.
As of c-ares 1.21.0 these are simply wrappers around a single parser, and
simply convert the parsed DNS response into the data structures the legacy
parsers used which is a small amount of code and not likely going to vary
based on the input data.
Instead, these days, it makes more sense to test the new parser directly
instead of calling it 10 or 11 times with the same input data to speed up
the number of iterations per second the fuzzer can perform.
We are keeping this legacy fuzzer test for historic reasons or if someone
finds them of use hidden behind a define of USE_LEGACY_PARSERS.
Authored-By: Brad House (@bradh352)
c-ares uses multiple code styles, standardize on one. Talking with @bagder he feels strongly about maintaining an 80 column limit, but feels less strongly about things I feel strongly about (like alignment).
Can re-run the formatter on the codebase via:
```
clang-format -i */*.c */*.h */*/*.c */*/*.h
```
Fix By: Brad House (@bradh352)
PR #568 increased the warning levels and c-ares code emitted a bunch of warnings. This PR fixes those warnings and starts transitioning internal data types into more proper forms (e.g. data lengths should be size_t not int). It does, however, have to manually cast back to what the public API needs due to API and ABI compliance (we aren't looking to break integrations, just clean up internals).
Fix By: Brad House (@bradh352)
All files have their licence and copyright information clearly
identifiable. If not in the file header, they are set separately in
.reuse/dep5.
All used license texts are provided in LICENSES/
The rc4 function iterates over a buffer of size buffer_len who's maximum
value is INT_MAX with a counter of type short that is not guaranteed to
have maximum size INT_MAX.
In circumstances where short is narrower than int and where buffer_len
is larger than the maximum value of a short, it may be possible to loop
infinitely as counter will overflow and never be greater than or equal
to buffer_len.
The solution is to make the comparison be between types of equal width.
This commit defines counter as an int.
Fix By: Fionn Fitzmaurice (@fionn)
Brad House
Daniel Stenberg
Martin Holeš
David Hotham
Fionn Fitzmaurice