GitLab

* Extend logging in IOFetch (and add message definitions)
* Update buffer size setting for UDP socket
* remove spaces at end of lines in other files

updated a comment description, and moved caching of answers to after the response classifier has run

These should probably really be done by asio.hpp

they appeared to still have been too low for some systems

Replaced with IOFetch with a protocol selection of UDP.

IOFetch is a general upstream "fetch" class that should be able to
operate over TCP or UDP.  Related changes have been made in the
associated classes.  So far, only the unit tests for a UDP fetch
have been made (and passed).

the check that we have already sent something if the timeout happens to fire was missing, discussed with Jeremy on jabber

Added some extensive dlog() calls for testing while we are building this

It only stores the final result, and only looks into the cache at the start of a resolve() call right now, but it appears to work

Updated function names to match convention.  Also added receiveComplete()
to prepare for the fact that a TCP receive may require multiple reads
before the complete message is read.

forgot an EXTRA_DIST for the distcheck, and sunstudio needs unistd to be included before asio.hpp

Admin tasks:
* Split out io_error.h from asiolink.h
* Made test files follow naming convention of main files
* More discriminatory includes in some files
* Updates tests/Makefile.am

Coding tasks:
* Add additional methods to io_socket.* and put in dummies in
  {tcp,udp}_socket.h
* Incorporated basic IO Fetch code from Scott

The test directory now contains test files that used to be in internal/ (where the makefile did have this addition)

and removed empty top level file

Though most of the tests fell into recursive_query_unittest.cc

and moved them out of internal. Changed the internal/ workaround (to prevent files outside of asiolink/ to indirectly include asio.hpp), the .cc files that include the relevant headers must include asio.hpp themselves (and this is checked in the headers)
Also moved coroutine out of internal.
Tests are still todo (which is why internal/ still exists)

asiolink.h is now merely a 'collection' header that includes all the
rest

as to copySection, it's now called appendSection, and works the other
way around (i.e. it copies from a source message into the object,
instead of copying from the object to a target message), which feels
more natural

and updated some doxygens as per Jeremy's mail

client timeout and auth errors now result in SERVFAIL being sent back
added copySection and moved copyAnswerMessage to resolve.cc (no need to
have that in asiolink)

clearSection is a convenience function to clear all RRsets in a message
used by makeErrorMessage, which is a helper function to quickly clear
any data built up in the answer so far, and set an error Rcode

This adds two arguments to classify(), cname_target and cname_count;
which are modified if a CNAME chain is found (so we don't have to jump
through the packet twice with exactly the same code)

          Now both tcp and udp are supported in IOFetch