Allows clients to prevent leaking IP addresses through DNS lookups. This
option, together with disabling Tox UDP, entirely prevents any UDP
packets being sent by toxcore.
It makes no sense to include it in the public API as clients can't make
any meaningful use of it via public API, it can only be used if one also
includes other internal/private headers that we don't install.
It's used only in the testing code, which has access to the internal
headers.
Fixes#2739, at least to some degree. I decided against moving things to
a separate `tox_testing.h` and leaving only things in `tox_private.h`
that we are fine with clients using, as otherwise `tox_lock()` /
`tox_unlock()` would have to be moved out of `tox_private.h` to
somewhere else, but `tox_private.h` actually sounds like the right place
for them, naming-wise. So perhaps it's fine if we have things in
`tox_private.h` that we don't want clients to use.
These programs link against libsodium, which already provides bin-to-hex
and hex-to-bin conversion functions. Removing the misc_tools dependency
shaves ~30KiB (in some cases 10%) off Windows static binaries using it.
Sparse checks it. This is neater than using a struct, which has some
slightly weird syntax at times. This also reduces the risk of someone
adding another struct member.
These are more convenient and safer than the manual vtables we have in
the fuzzer support code. We can override individual member functions,
and C++ will take care of correctly casting and offsetting this-pointers
when needed.
So we don't need to write so many edge case tests ourselves for things
like parsers, which really don't need those manual tests, as long as we
can check for some properties like "can output the parsed data and it'll
be the same as the input".
Instead of using `target_link_modules`, which does magic that we no
longer need, because we only have 1 library we install, and all binaries
we build link statically because they need access to internal symbols.
We now depend on libsodium unconditionally. Future work will require
functions from libsodium, and nobody we're aware of uses the nacl build
for anything other than making sure it still works on CI.
Also flip some callback asserts, because they can be reached by fuzzing
eventually.
Also update the bootstrapd checksum, since the alpine image changed a
bit.
If the `recvbuf` network function returns 0 all the time, that means
there is never any data available on the TCP socket. This change makes
it so there is a random amount of data available on the TCP socket.
This invalidates the bootstrap fuzzer corpus.
iphydf