Tor sends a RESOLVEFAILED event when a reverse lookup succeeds.
Having SETEVENTS ADDRMAP and STREAM, I get
```
650 STREAM 23575 NEWRESOLVE 0 8.8.8.8:0 PURPOSE=DNS_REQUEST
650 STREAM 23575 NEW 7180 8.8.8.8:0 SOURCE_ADDR=(Tor_internal):58649 PURPOSE=DNS_REQUEST
650 STREAM 23575 SENTRESOLVE 7180 8.8.8.8:0
650 ADDRMAP REVERSE[8.8.8.8] google-public-dns-a.google.com "2011-07-07 01:55:07" EXPIRES="2011-07-07 05:55:07"
650 STREAM 23575 FAILED 7180 8.8.8.8:0 REASON=RESOLVEFAILED
650 STREAM 23575 CLOSED 7180 8.8.8.8:0 REASON=DONE
```
or something similar with any successful reverse DNS request. I'm using 0.2.3.1-alpha-dev (git-e273890b10092b0a).
**Trac**:
**Username**: katmagic
issue