[tor-bugs] #30794 [Circumvention/Censorship analysis]: Create lightweight censorship analyser for users

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#30794: Create lightweight censorship analyser for users
-----------------------------------------------+--------------------------
 Reporter:  phw                                |          Owner:  phw
     Type:  project                            |         Status:  assigned
 Priority:  Medium                             |      Milestone:
Component:  Circumvention/Censorship analysis  |        Version:
 Severity:  Normal                             |     Resolution:
 Keywords:  tbb-bridges                        |  Actual Points:
Parent ID:                                     |         Points:  5
 Reviewer:                                     |        Sponsor:
-----------------------------------------------+--------------------------

Comment (by dcf):

 I tried it at commit [https://dip.torproject.org/anti-
 censorship/emma/tree/c8924dce26a28193b8478f72941d3b857a24c343
 c8924dce26a28193b8478f72941d3b857a24c343] and got the following output:
 {{{
 Testing TCP port of default bridges.
         reachable: 109.105.109.163:38980
         reachable: 109.105.109.163:47779
         reachable: 109.105.109.165:10527
         reachable: 109.105.109.147:13764
         unreachable: 85.17.30.79:443 (dial tcp 85.17.30.79:443: connect:
 connection refused)
         reachable: 38.229.1.78:80
         reachable: 38.229.33.83:80
         unreachable: [2001:470:b381:bfff:216:3eff:fe23:d6c3]:443 (dial tcp
 [2001:470:b381:bfff:216:3eff:fe23:d6c3]:443: i/o timeout)
         reachable: 192.95.36.142:443
         reachable: 37.218.240.34:40035
         reachable: 37.218.245.14:38224
         reachable: 85.31.186.98:443
         reachable: 85.31.186.26:443
         reachable: 216.252.162.21:46089
         reachable: 144.217.20.138:80
 Testing TCP port of directory authorities.
         reachable: 128.31.0.39:9131
         reachable: [2001:858:2:2:aabb:0:563b:1526]:443
         reachable: 86.59.21.38:80
         reachable: 194.109.206.212:80
         reachable: 66.111.2.131:9030
         reachable: [2001:638:a000:4140::ffff:189]:443
         reachable: 131.188.40.189:80
         reachable: [2001:678:558:1000::244]:443
         reachable: 193.23.244.244:80
         reachable: [2001:67c:289c::9]:80
         reachable: 171.25.193.9:443
         reachable: 154.35.175.225:80
         reachable: 199.58.81.140:80
         reachable: [2620:13:4000:6000::1000:118]:443
         reachable: 204.13.164.118:80
 Testing *.torproject.org domains.
         Everything as expected.
 }}}

 Ideas:
  * If emma.exe is double-clicked on Windows, it may open a terminal
 window, display the output, then close the window again. Perhaps in the
 default configuration, it should append its output (timestamped) to a
 file.
  * For reachability tests, it would be good to show an elapsed time, in
 both the reachable and unreachable case.
  * For the DNS lookups, it would be nice to see what names were resolved.
 This is in case there are multiple versions of the program distributed, so
 we can tell from the output whether the domains included a particular one
 that we care about.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30794#comment:3>
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