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259 Commits

Author SHA1 Message Date
Nick Mathewson
d3af1f2189 Backport candidate: Fix a long-standing server-side DNS bug. When a 
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
 2006-09-24 17:05:00 +00:00
Nick Mathewson
4218f09820 r8910@Kushana: nickm | 2006-09-22 12:14:05 -0400 
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
 2006-09-22 20:20:26 +00:00
Nick Mathewson
f0f3bbc63b r8901@Kushana: nickm | 2006-09-21 20:43:48 -0400 
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
 2006-09-22 00:45:08 +00:00
Nick Mathewson
29a756af8e Fix a couple of server-side reverse dns bugs 
svn:r8449
 2006-09-22 00:10:26 +00:00
Nick Mathewson
63395c747c Fix stupid C mistake. Glad I caught that one fast. 
svn:r8448
 2006-09-21 22:57:07 +00:00
Nick Mathewson
58200f06a5 Fix bug in r8440: base32 uses 5 bytes per char, not 4. 
svn:r8447
 2006-09-21 22:24:45 +00:00
Nick Mathewson
59f9487225 r8880@Kushana: nickm | 2006-09-21 17:26:02 -0400 
Trivial patch to appease warn-happy gcc: mark unused parameter


svn:r8445
 2006-09-21 21:49:15 +00:00
Nick Mathewson
7c21dabef1 r8878@Kushana: nickm | 2006-09-21 17:15:47 -0400 
Trivial whitespace cleanups.


svn:r8443
 2006-09-21 21:48:55 +00:00
Nick Mathewson
e4a9b4de4e r8875@Kushana: nickm | 2006-09-21 16:46:28 -0400 
Resolve bug 330: detect ISPs that want to hijack failing DNS requests and basically domain-squat the entire internet.


svn:r8440
 2006-09-21 21:48:22 +00:00
Nick Mathewson
04bec67574 r8874@Kushana: nickm | 2006-09-21 15:22:27 -0400 
Rename and document SearchDomains and ResolvConf options; warn if ServerDNSResolvConfFile is given but eventdns isnt enabled.


svn:r8439
 2006-09-21 21:48:16 +00:00
Nick Mathewson
083e9c2b59 r8873@Kushana: nickm | 2006-09-21 14:38:22 -0400 
Fix a bug: Remember, each call to escaped() replaces the value returned from the last call to escaped().


svn:r8438
 2006-09-21 21:48:11 +00:00
Nick Mathewson
a942441615 r8872@Kushana: nickm | 2006-09-21 14:00:20 -0400 
Implement server-side reverse DNS using eventdns.  Add an option to routerdescs so we can tell which servers have eventdns enabled.


svn:r8437
 2006-09-21 21:48:06 +00:00
Mike Chiussi
5d773af545 undid whitespace changes to dns.c 
svn:r8346
 2006-09-07 06:36:22 +00:00
Mike Chiussi
b931994c6a fixed win32 eventdns snafu 
svn:r8345
 2006-09-07 06:34:20 +00:00
Mike Chiussi
c40acb86f4 - got rid of tabs 
svn:r8344
 2006-09-07 04:02:52 +00:00
Mike Chiussi
5af47d1641 - added some debugging lines to load_nameservers_from_registry() 
svn:r8342
 2006-09-07 03:53:14 +00:00
Roger Dingledine
ae67a044f0 clean up some comments 
svn:r8338
 2006-09-07 01:23:15 +00:00
Nick Mathewson
e10e921386 r8729@Kushana: nickm | 2006-09-06 16:20:40 -0400 
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
 2006-09-06 20:22:05 +00:00
Nick Mathewson
365ccf0742 r8725@Kushana: nickm | 2006-09-06 04:39:29 -0400 
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
 2006-09-06 08:42:20 +00:00
Mike Chiussi
6ec9c1092a - made configure check if we are building for win32 
- 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
 2006-09-06 01:49:55 +00:00
Nick Mathewson
8138d1c0a4 r8654@Kushana: nickm | 2006-08-28 16:50:36 -0400 
I bet real programmers even have programs that compile.


svn:r8278
 2006-08-28 20:50:47 +00:00
Nick Mathewson
dc4951314f r8652@Kushana: nickm | 2006-08-28 16:41:44 -0400 
Resolve bug 324: strdup the right variable.


svn:r8277
 2006-08-28 20:42:14 +00:00
Nick Mathewson
dbe0c6f6ef r8609@Kushana: nickm | 2006-08-27 17:24:27 -0400 
Add some doxygen, concentrated in dns.c


svn:r8256
 2006-08-28 03:16:02 +00:00
Nick Mathewson
54ca0387a5 r8608@Kushana: nickm | 2006-08-27 16:57:47 -0400 
Make it possible to change nameserver options while Tor is running.


svn:r8255
 2006-08-28 03:15:55 +00:00
Nick Mathewson
be7054c626 r8607@Kushana: nickm | 2006-08-27 15:45:42 -0400 
Change configuration strategy for eventdns. Instead of elaborate option set, just allow the user to specify another resolv.conf to use.


svn:r8254
 2006-08-28 03:15:50 +00:00
Nick Mathewson
d62f9a03fb r8605@Kushana: nickm | 2006-08-27 14:01:11 -0400 
divide eventdns log messages into warn and info messages.


svn:r8252
 2006-08-28 03:15:38 +00:00
Roger Dingledine
24ad1e06cf i'm guessing nick meant to check the return value of dns_init. 
and revise some log severities to match the convention.


svn:r8234
 2006-08-27 01:41:08 +00:00
Roger Dingledine
8297608217 fix typo 
svn:r8233
 2006-08-27 01:33:35 +00:00
Nick Mathewson
7739c5c49a r8573@Kushana: nickm | 2006-08-25 16:55:19 -0400 
Resolve bug 321 when using dnsworkers: append a period to every address we resolve at the exit node, so that we do not accidentally pick up local addresses, and so that failing searches are retried in the resolver search domains.  (This is already solved for eventdns.)


svn:r8225
 2006-08-25 21:02:01 +00:00
Nick Mathewson
ae5ee4c924 r7405@Kushana: nickm | 2006-08-16 14:38:46 -0400 
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
 2006-08-16 18:47:24 +00:00
Roger Dingledine
d8fc598a2a dns.c:173: warning: control reaches end of non-void function 
svn:r7067
 2006-08-16 02:18:55 +00:00
Nick Mathewson
67b775bc6e r7397@Kushana: nickm | 2006-08-15 00:46:18 -0400 
Fix eventdns version of dns.c. Man, we need to get rid of this eventdns/dnsworker split.


svn:r7064
 2006-08-15 04:50:17 +00:00
Nick Mathewson
7bfb2cf4e8 r7393@Kushana: nickm | 2006-08-14 23:51:07 -0400 
remove extraneous #endif


svn:r7063
 2006-08-15 03:54:13 +00:00
Nick Mathewson
200e24981a r7046@Kushana: nickm | 2006-08-05 13:57:04 -0400 
Make it possible for dns_init() to fail; note failure of eventdns configuratoin.


svn:r7059
 2006-08-14 21:44:34 +00:00
Nick Mathewson
a5c0aa43a0 r7383@Kushana: nickm | 2006-08-14 16:16:03 -0400 
Stop walking entire dns cache for every request, now that we found our hash table bug.


svn:r7057
 2006-08-14 20:16:21 +00:00
Roger Dingledine
bf10d8a06a simplify compare_cached_resolves_by_expiry() to make it match 
the idioms of other compare functions. hopefully i didn't
break it?


svn:r7048
 2006-08-14 07:08:29 +00:00
Roger Dingledine
5647e5c7e6 fix typo, add explanatory comment 
svn:r7026
 2006-08-11 07:31:16 +00:00
Nick Mathewson
04bf4b0fc4 r7327@Kushana: nickm | 2006-08-11 00:00:36 -0700 
Fix a pedantic warning


svn:r7023
 2006-08-11 07:09:45 +00:00
Nick Mathewson
7ddd9e8cd9 r7304@Kushana: nickm | 2006-08-10 01:58:05 -0700 
Fix verbose compilation errors; make sure transparent proxy fails when no method is configured.


svn:r7012
 2006-08-10 09:02:26 +00:00
Nick Mathewson
3da737ac98 r7303@Kushana: nickm | 2006-08-10 01:52:19 -0700 
whitespace fixes


svn:r7011
 2006-08-10 09:02:12 +00:00
Roger Dingledine
bc2e040669 make svn trunk link again. nick can fix this if it's wrong. 
svn:r6982
 2006-08-04 20:30:45 +00:00
Nick Mathewson
3fa1cdafce r7009@Kushana: nickm | 2006-08-03 10:44:58 -0700 
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
 2006-08-04 18:26:13 +00:00
Nick Mathewson
87939813c3 r7008@Kushana: nickm | 2006-08-03 10:03:39 -0700 
Oops. We shouldnt initialize eventdns when we are not being a server and not resolving anything.


svn:r6975
 2006-08-04 18:24:41 +00:00
Nick Mathewson
a122bfb439 r7007@Kushana: nickm | 2006-08-03 09:58:30 -0700 
Export and use eventdns_config_windows_nameservers(); clean up some comments and log messages.


svn:r6974
 2006-08-04 18:24:25 +00:00
Roger Dingledine
3152d44c3a fix a seg fault on exit for clients; and fix a comment. 
svn:r6969
 2006-08-03 04:22:25 +00:00
Roger Dingledine
ed567c6feb more compile options mean more codepaths 
svn:r6963
 2006-07-31 20:25:57 +00:00
Nick Mathewson
b9082682fd r6982@Kushana: nickm | 2006-07-31 13:47:19 -0400 
documentation and naming tweaks in dns.c


svn:r6961
 2006-07-31 18:01:49 +00:00
Nick Mathewson
58c0ac77be r6981@Kushana: nickm | 2006-07-31 13:23:26 -0400 
More asserts for cache correctness.


svn:r6960
 2006-07-31 18:01:45 +00:00
Nick Mathewson
fd0bafb0de r6977@Kushana: nickm | 2006-07-31 13:01:28 -0400 
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
 2006-07-31 18:01:18 +00:00
Nick Mathewson
ccf9c1345e svn:r6955 2006-07-31 18:00:47 +00:00