Partial solution to 326: downgrade single-nameserver failures to INFO.


svn:r9201

 Refactor and unify my-ip-addr-changed logic.  Make change in IP address or in nameservers reset and relaunch DNS hijacking tests.


svn:r9200

 Fix bug 364: check for whether popular hostnames (curently google, yahoo, mit, and slashdot) are getting wildcarded.  If they are, we are probably behind a DNS server that is useless: change our exit policy to reject *:*.


svn:r9199

 Resolve bug 363: do not fall back to 127.0.0.1 when no nameservers are configured.  Instead, have the admin fix resolv.conf or configure a nameserver.


svn:r9157

also fix a bug next to it that i noticed.


svn:r8784

 Change HT_INIT from a special-case to a macro-calling-a-function like the rest of ht.h.  This might prevent errors if somebody did, I dunno, "HT_INIT(tp, hashtable++)". Based on a patch from Watson Ladd.


svn:r8776

svn:r8606

svn:r8599

 We're trying to catch the kind of jerk who'd hijack zy6pzwohtnlq.test,
 not the kind of lunatic who'd hijack zy6pzwohtnlq%s.test, though
 apparently those exist too.
 


svn:r8595

 Differentiate more duplicated log entries


svn:r8542

 Make distinct all non-bug messages at notice or higher that appear 3 or more times.


svn:r8541

 Fix for reverse dns: only assume we will get an answer when the result was success.


svn:r8507

Minor fix: add code to eventdns so it can free memory on shutdown. This should help valgrind and dmalloc freak out less.

svn:r8503

svn:r8497

svn:r8485

Marge changes from libevent evdns to our eventdns.  Most are cosmetic, but one or two are stability-related.  This should make it easier to push our changes back towards libevent.

svn:r8482

client asks us to resolve (not connect to) an address, and we have a
cached answer, give them the cached answer.  Previously, we would give
them no answer at all.



svn:r8478

 Instead of just checking known-invalid addresses for DNS hijacking, we
 now check randomly generated addresses, and if too many of them map to
 the same IP, we assume that IP is the destination of a DNS hijack
 attempt.
 
 A little bird tells me that some DNS hijackers think that declining to
 give an A record for RFC2606 addresses (like .invalid and .example)
 makes them more standards compliant.  Standardswise, this is like an
 illicit brothel making sure that nobody has pulled the tags off the
 mattresss, but that doesn't get us out of working around it.
 


svn:r8465

 I tracked a bug in server-side reverse DNS to something concerning the caching code. Ive disabled server-side cacheing for reverse DNS answers for now, and I am noting the bug in the TODO.


svn:r8454

svn:r8449

svn:r8448

svn:r8447

 Trivial patch to appease warn-happy gcc: mark unused parameter


svn:r8445

 Trivial whitespace cleanups.


svn:r8443

 Resolve bug 330: detect ISPs that want to hijack failing DNS requests and basically domain-squat the entire internet.


svn:r8440

 Rename and document SearchDomains and ResolvConf options; warn if ServerDNSResolvConfFile is given but eventdns isnt enabled.


svn:r8439

 Fix a bug: Remember, each call to escaped() replaces the value returned from the last call to escaped().


svn:r8438

 Implement server-side reverse DNS using eventdns.  Add an option to routerdescs so we can tell which servers have eventdns enabled.


svn:r8437

svn:r8346

svn:r8345

svn:r8344

svn:r8342

svn:r8338

 Fix dns_cancel_pending_resolve() to realize pending resolves have expiry times, and should not be freed except when they fall off the pqueue.


svn:r8328

 spawn_func fixes: have cpuworker_main and dnsworker_main confirm to the right interfaces [casting func to void* is icky].  Also, make pthread_create() build without warnings.


svn:r8327

- made configure link to required system dll's if building for win32
- added diffs for libevent 1.1b
- forced user to turn off eventdns if win32 is set 
- cleaned up tor_mmap_file()_win32 (not sure if it's stable)
- cleaned up some warnings and typos




svn:r8322

 I bet real programmers even have programs that compile.


svn:r8278

 Resolve bug 324: strdup the right variable.


svn:r8277

 Add some doxygen, concentrated in dns.c


svn:r8256

 Make it possible to change nameserver options while Tor is running.


svn:r8255