Bug 32864: Add script for help with exit relays with DNS issues

bad-exit-dns.sh

+#!/bin/bash
+
+# Copyright (c) 2020, The Tor Project, Inc.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#
+#     * Neither the names of the copyright owners nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Usage:
+# 0) Make sure you have the `jr` tool installed first
+# 1) Point this script to a file containing the JSON result of a
+#    `tor_dns_survey`-run, optionally specifying an error threshold for relays
+#    we are interested in (default is 10)
+# 2) The result will be the RSA fingerprints of relays with at least as many
+#    test run errors shown as the chosen threshold specifies.
+
+if [ "$#" = 1 ]; then
+  json_file="$1"
+  threshold=10
+elif [ "$#" = 2 ]; then
+  json_file="$1"
+  threshold="$2"
+else
+  echo >&2 "Usage: $0 JSON_file [error threshold]"
+  exit 1
+fi
+
+date=`date +%s`
+# Extract the relays and fingerprints
+relays=`jq '.["eff.org"]' $json_file`
+fps=`jq keys <<< $relays`
+# How many relays we tested
+relay_length=`jq length <<< $fps`
+for (( r = 0; r < $relay_length; r++ ))
+do
+  failures=0
+  status=()
+  relay=`jq .[$r] <<< $fps`
+  echo "Relay to check: $relay"
+  relay_results=`jq .["$relay"] <<< $relays`
+  # We have measured each relay ten times, let's check the results
+  for i in {0..9}
+  do
+    result=`jq --arg count $i '.[$count|tonumber] | .[0]' <<< $relay_results`
+    # Record the status, so we can help relay operators better
+    status+=("$result")
+    if [[ $result != *"\"SUCCEEDED\""* ]]
+    then
+      ((failures++))
+    fi
+  done
+  # We are only interested in relays with failures that are equal to or above our
+  # threshold.
+  if [[ $failures -ge $threshold ]]
+  then
+    echo "$relay" | grep -oh -E [0-9A-F]{40} >> dns_failures_$date
+    for i in "${status[@]}"
+    do
+      echo "  $i" >> dns_failures_$date
+    done
+    echo "" >> dns_failures_$date
+  fi
+done
+exit 0