Implement reverse DNS lookup in eventdns: add new entry point; rename old entry point; revise TODO a little; add facility for parsing dns names.


svn:r7070

svn:r7067

 Fix eventdns version of dns.c. Man, we need to get rid of this eventdns/dnsworker split.


svn:r7064

 remove extraneous #endif


svn:r7063

 Make it possible for dns_init() to fail; note failure of eventdns configuratoin.


svn:r7059

 Stop walking entire dns cache for every request, now that we found our hash table bug.


svn:r7057

the idioms of other compare functions. hopefully i didn't
break it?


svn:r7048

svn:r7026

 Fix a pedantic warning


svn:r7023

 Fix verbose compilation errors; make sure transparent proxy fails when no method is configured.


svn:r7012

 whitespace fixes


svn:r7011

svn:r6982

 Add functions to eventdns to allow detecting whether we have any nameservers configured, and to change the list of nameservers after initial configuration.


svn:r6976

 Oops. We shouldnt initialize eventdns when we are not being a server and not resolving anything.


svn:r6975

 Export and use eventdns_config_windows_nameservers(); clean up some comments and log messages.


svn:r6974

svn:r6969

svn:r6963

 documentation and naming tweaks in dns.c


svn:r6961

 More asserts for cache correctness.


svn:r6960

 Solve timing-out pending connections. Add pending resolves to expiry queue; when we find an answer, change the pending resolve to "done" and stick the actual answer in the expiry queue as a new entry.  This uses a little more memory, but makes the code simpler than other solutions.


svn:r6956

svn:r6955

 start restructuring dns to use priority queues for expiring entries.


svn:r6954

svn:r6937

svn:r6927

svn:r6926

svn:r6924

Add more asserts in dns_found_answer.  This may confirm my theory that dns_purge_resolve is the culprit.

svn:r6922

 Fix compilation for eventdns dns.c with split structs.


svn:r6908

 Clean up wide lines from last patch.


svn:r6907

 Refactor connection_t into edge, or, dir, control, and base subtypes.  This might save some RAM on busy exit servers, but really matters most in terms of correctness.


svn:r6906

circuit_t into origin_circuit_t and or_circuit_t.  I fixed some
segaults; there may be more.  We still need to move more rendezvous
stuff into subtypes.

This is a trial run for splitting up connection_t; if the approach is
insane, please say so soon so we can do something smarter.

Also, this discards the old HALF_OPEN code, which nobody seems to
want.


svn:r6817

svn:r6803

svn:r6763

svn:r6756

svn:r6751

When using eventdns: suppress logging of addresses when SafeLogging is active, and make set of nameservers configurable from torrc.


svn:r6744

svn:r6730

svn:r6728

svn:r6628

This happened when we got two create cells in a row from the same TLS
connection. It would hand one to the cpuworker, and then immediately
handle the second one -- after it had registered that the first one was
busy, but before it had updated the timestamp that we use to decide how
*long* it's been busy.


svn:r6606