[tor-bugs] #21611 [Applications/Tor Browser]: about:networking has DNS lookup feature -- investigate proxy settings compliance

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#21611: about:networking has DNS lookup feature -- investigate proxy settings
compliance
-------------------------------------------------+-------------------------
 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  task                                 |         Status:  closed
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:  fixed
 Keywords:  ff52-esr, TorBrowserTeam201704,      |  Actual Points:
  tbb-7.0-must-alpha                             |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
-------------------------------------------------+-------------------------
Changes (by gk):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 {{{
 function doLookup() {
   let host = document.getElementById("host").value;
   if (host) {
     gDashboard.requestDNSLookup(host, displayDNSLookup);
   }
 }
 }}}
 (https://dxr.mozilla.org/mozilla-
 esr52/source/toolkit/content/aboutNetworking.js#389) is responsible for
 the lookup which goes to `Dashboard::RequestDNSLookup()`
 (https://dxr.mozilla.org/mozilla-
 esr52/source/netwerk/base/Dashboard.cpp#735) which calls
 `mDnsService->AsyncResolve()` which in turn calls
 `nsDNSService::AsyncResolveExtended()` which we have patched.

 The browser console returns our error code: `NS_ERROR_UNKNOWN_PROXY_HOST`.
 So, we are good here I think.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21611#comment:5>
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