v0.6.1

https://github.com/thegreenwebfoundation/co2.js/commit/b0a65fe073c8a4d7fc2adbafb1844e4cae3ee6c2

.gitlab-ci.yml

@@ -25,9 +25,11 @@ build:
   - "apk add sqlite-static"
   - "shards install"
   - "crystal build --release --static src/access_log.cr"
-  - "strip --strip-all access_log"
+  - "crystal build --release --static src/ip2asn_server.cr"
+  - "strip --strip-all access_log ip2asn_server"
   - "install -Dm 644 LICENSE ${RELEASE_DIRECTORY}/LICENSE"
   - "install -Dm 755 access_log ${RELEASE_DIRECTORY}/access_log"
+  - "install -Dm 755 ip2asn_server ${RELEASE_DIRECTORY}/ip2asn_server"
   - "tar -cf ${RELEASE_TARBALL} ${RELEASE_DIRECTORY}"
   artifacts:
     paths:

README.md

@@ -195,6 +195,18 @@ Then run the program with the required flags enabled:
 access_log --swd --device-country
 ```
 
+## ASN database
+
+If you want to keep track of ASN for each visitor, for instance for
+grouping possible attacks or IA crawls, create a database based on
+<https://iptoasn.com/>:
+
+```bash
+./contrib/asn_database.sh
+```
+
+And start the server with the `--asn-database=` flag.
+
 ## Crawler user agents
 
 Download the [crawler user agents

contrib/asn_database.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -e
+
+db="${1:-$PWD/asn.sqlite3}"
+sqlite3 "$db" "CREATE TABLE IF NOT EXISTS asn (range_start INTEGER, range_end INTEGER, id INTEGER, country STRING, description TEXT);"
+sqlite3 "$db" "CREATE INDEX IF NOT EXISTS asn_id_idx ON asn (id);"
+sqlite3 "$db" "CREATE TABLE IF NOT EXISTS status (id INTEGER PRIMARY KEY, blocked BOOLEAN DEFAULT FALSE);"
+sqlite3 "$db" "DELETE from asn;"
+wget https://iptoasn.com/data/ip2asn-v4-u32.tsv.gz -O - | gunzip | sqlite3 -tabs "$db" ".import '|cat -' asn"
+
+echo "ASN database created/updated at $db"

contrib/create.sql

@@ -53,7 +53,10 @@ CREATE TABLE IF NOT EXISTS "access_logs" (
  "network_co2" float DEFAULT NULL,
  "consumer_device_co2" float DEFAULT NULL,
  "production_co2" float DEFAULT NULL,
- "total_co2" float DEFAULT NULL
+ "total_co2" float DEFAULT NULL,
+ "node" varchar DEFAULT NULL,
+ "asn" integer DEFAULT NULL,
+ "http3" varchar(2) DEFAULT NULL
 );
 
 CREATE INDEX IF NOT EXISTS "index_access_logs_on_host" ON "access_logs" ("host");

contrib/ip2asn_nginx.conf

@@ -0,0 +1,19 @@
+keyval_zone_redis zone=ip2asn hostname=::1;
+keyval "$remote_addr:id" $asn zone=ip2asn;
+keyval "$remote_addr:blocked" $asn_blocked zone=ip2asn;
+
+limit_conn_zone $asn zone=asn_conn:10m;
+limit_req_zone $asn zone=asn_req:10m rate=10r/s;
+
+server {
+  server_name _;
+
+  listen 80 default_server;
+
+  if ($asn_blocked) {
+    return 444;
+  }
+
+  limit_conn asn_conn 1;
+  limit_req zone=asn_req nodelay;
+}

shard.yml

@@ -1,5 +1,5 @@
 name: "access_log"
-version: "0.5.9"
+version: "0.6.1"
 authors:
 - "f <f@sutty.nl>"
 targets:

spec/swd_spec.cr

@@ -111,31 +111,31 @@ describe SWD do
 
   describe "#consumer_device_co2" do
     it "should extract the consumer device co2 emissions" do
-      swd.consumer_device_co2.should(eq 0.6343432152938272)
+      swd.consumer_device_co2.should(eq 0.6854924454444445)
     end
   end
 
   describe "#production_co2" do
     it "should extract the production co2 emissions" do
-      swd.production_co2.should(eq 0.2317792517419753)
+      swd.production_co2.should(eq 0.2504683935277778)
     end
   end
 
   describe "#network_co2" do
     it "should extract the network co2 emissions" do
-      swd.network_co2.should(eq 0.1707847118098766)
+      swd.network_co2.should(eq 0.1845556583888889)
     end
   end
 
   describe "#datacenter_co2" do
     it "should extract the datacenter co2 emissions" do
-      swd.datacenter_co2.should(eq 0.1829836197962963)
+      swd.datacenter_co2.should(eq 0.19773820541666665)
     end
   end
 
   describe "#total_co2" do
     it "should extract the total co2 emissions" do
-      swd.total_co2.should(eq 1.2198907986419754)
+      swd.total_co2.should(eq 1.3182547027777778)
     end
   end
 end

src/access_log.cr

@@ -10,8 +10,9 @@ require "system"
 require "./models/access_log"
 require "./models/crawler"
 require "./swd"
+require "./asn"
 
-VERSION = "0.5.8"
+VERSION = "0.6.1"
 
 Log.setup_from_env
 
@@ -19,13 +20,15 @@ Log.setup_from_env
 socket = "/tmp/access_log.socket"
 # The default database URI
 database = "sqlite3://./development.sqlite3"
+# ASN database
+asn_database = ""
 # Detect web crawlers
 crawler = false
 # Parse the crawlers repository
 crawlers = [] of Crawler
 # Fields in database
 # TODO: Obtain them from AccessLog
-fields = %w[id remote_user host msec server_protocol request_method request_completion uri request_uri query_string status sent_http_content_type sent_http_content_encoding sent_http_etag sent_http_last_modified http_accept http_accept_encoding http_accept_language http_pragma http_cache_control http_if_none_match http_dnt http_user_agent http_origin http_referer request_time bytes_sent body_bytes_sent request_length http_connection pipe connection_requests geoip2_data_country_name geoip2_data_city_name ssl_server_name ssl_protocol ssl_early_data ssl_session_reused ssl_curves ssl_ciphers ssl_cipher sent_http_x_xss_protection sent_http_x_frame_options sent_http_x_content_type_options sent_http_strict_transport_security nginx_version pid crawler datacenter_co2 network_co2 consumer_device_co2 production_co2 total_co2 node]
+fields = %w[id remote_user host msec server_protocol request_method request_completion uri request_uri query_string status sent_http_content_type sent_http_content_encoding sent_http_etag sent_http_last_modified http_accept http_accept_encoding http_accept_language http_pragma http_cache_control http_if_none_match http_dnt http_user_agent http_origin http_referer request_time bytes_sent body_bytes_sent request_length http_connection pipe connection_requests geoip2_data_country_name geoip2_data_city_name ssl_server_name ssl_protocol ssl_early_data ssl_session_reused ssl_curves ssl_ciphers ssl_cipher sent_http_x_xss_protection sent_http_x_frame_options sent_http_x_content_type_options sent_http_strict_transport_security nginx_version pid crawler datacenter_co2 network_co2 consumer_device_co2 production_co2 total_co2 node asn http3]
 # Params for the query
 params = [] of String
 # SWD
@@ -56,6 +59,10 @@ OptionParser.parse do |p|
     database = d
   end
 
+  p.on "-I DATABASE", "--asn-database=DATABASE", "ASN Database URI" do |d|
+    asn_database = d
+  end
+
   p.on "-c crawler-user-agents.json", "--crawlers crawler-user-agents.json", "Crawlers repository" do |c|
     crawler = true
     crawlers = Array(Crawler).from_json File.read(c)
@@ -110,26 +117,41 @@ if crawler
   crawler_re = Regex.union(crawlers.map { |c| c.pattern })
 end
 
+def remove_socket!(socket)
+  FileUtils.rm(socket) if File.exists? socket
+end
+
+remove_socket!(socket)
+
+asn = ASN.new(asn_database) unless asn_database.empty?
 server = Socket.unix(Socket::Type::DGRAM)
 server.bind Socket::UNIXAddress.new(socket)
 
+def close_server!(server, asn)
+  server.try(&.close)
+  asn.try(&.close)
+end
+
 Signal::INT.trap do
-  server.close
-  FileUtils.rm(socket) if File.exists? socket
+  remove_socket!(socket)
+  close_server!(server, asn)
   exit
 end
 
 Signal::KILL.trap do
-  server.close
-  FileUtils.rm(socket) if File.exists? socket
+  remove_socket!(socket)
+  close_server!(server, asn)
   exit
 end
 
+MAX_SIZE = 1024 * 64 # 64K
+
 # Open the database and wait for JSONL input.
-db = DB.open database do |db|
+DB.open database do |db|
   while true
     begin
-      msg, _ = server.receive(1024 * 64) # 64K
+      msg, _ = server.receive(MAX_SIZE)
+      # TODO: is this the best method?
       _, json = msg.split("{", 2)
       json = "{#{json}"
 
@@ -137,6 +159,8 @@ db = DB.open database do |db|
       access_log = AccessLog.from_json(json || "{}")
       d = device_country ? access_log.geoip2_data_country_iso_code : nil
       s = SWD.new(access_log.bytes_sent, renewable, datacenter, d, intensity) if swd
+      i = access_log.remote_addr
+      a = asn.try(&.query(i)) if i
 
       # Execute query, detect crawler if enabled.
       # TODO: Does Crystal support splats?  It does but we need to cast
@@ -195,14 +219,16 @@ db = DB.open database do |db|
               (swd ? s.try(&.consumer_device_co2) : nil),
               (swd ? s.try(&.production_co2) : nil),
               (swd ? s.try(&.total_co2) : nil),
-              (node ? System.hostname : nil)
+              (node ? System.hostname : nil),
+              a.try(&.id),
+              access_log.http3
 
     # Ignore parsing errors
     rescue e : JSON::ParseException
       Log.warn &.emit("Parse exception", error: e.message)
     rescue IO::Error
-      server.close
-      FileUtils.rm(socket) if File.exists? socket
+      remove_socket!(socket)
+      close_server!(server, asn)
       exit
     end
   end

src/asn.cr

@@ -0,0 +1,45 @@
+require "db"
+require "sqlite3"
+
+class AsnResult
+  include DB::Serializable
+
+  property id : Int64?
+  property country : String?
+  property description : String?
+  property blocked : Bool?
+end
+
+class ASN
+  QUERY = "select id, country, description from asn where ? between range_start and range_end limit 1;"
+  STATUS = "select blocked from status where id = ? limit 1;"
+
+  property db : DB::Database
+
+  def initialize(database : String)
+    @db = DB.open(database)
+    @cache = Hash(UInt32, AsnResult).new
+  end
+
+  # Binary representation of an IPv4 address
+  def to_binary(address : String) : UInt32
+    (address.split(".").map(&.to_u32).reduce(0.to_u32) { |t, v| (t << 8) + v })
+  end
+
+  # Lookups an address and returns the ASN for it
+  def query(address : String)
+    query(to_binary(address))
+  end
+
+  def query(binary_address : UInt32) : AsnResult?
+    (@cache[binary_address] ||= @db.query_one(QUERY, binary_address.to_i64, &.read(AsnResult))).tap do |result|
+      result.blocked = @db.query_one(STATUS, result.id, &.read(Bool))
+    end
+  rescue DB::NoResultsError
+    nil
+  end
+
+  def close
+    @db.close
+  end
+end

src/ip2asn_server.cr

@@ -0,0 +1,90 @@
+# This is a very minimal Redis server that works with Nginx keyval
+# module.  When set like this:
+#
+# keyval_zone_redis zone=redis hostname=::1;
+# keyval "$remote_addr:id" $asn_id zone=redis;
+#
+# We can query the ASN id from a database and use it on Nginx config to
+# rate limit entire subnets.
+require "log"
+require "option_parser"
+require "./asn"
+require "./redis_server"
+
+Log.setup_from_env
+
+VERSION = "0.2.0"
+ASN_ID = "id"
+ASN_DESCRIPTION = "description"
+ASN_COUNTRY = "country"
+ASN_BLOCKED = "blocked"
+
+asn_database = "sqlite3://./asn.sqlite3"
+interface = "localhost"
+port = 6379
+
+OptionParser.parse do |p|
+  p.banner = "IP to ASN Redis server"
+
+  p.on "-v", "--version", "Show version" do
+    puts VERSION
+    exit
+  end
+
+  p.on "-h", "--help", "Show help" do
+    puts p
+    exit
+  end
+
+  p.on "-d #{asn_database}", "--asn-database=#{asn_database}", "ASN Database URI" do |d|
+    asn_database = d
+  end
+
+  p.on "-i #{interface}", "--interface=#{interface}", "Listening interface" do |i|
+    interface = i
+  end
+
+  p.on "-p #{port}", "--port=#{port}", "Listening port" do |p|
+    port = p.to_i
+  end
+end
+
+asn = ASN.new(asn_database)
+
+# The client can be a long lived connection sending commands. We only
+# answer to GET commands.
+RedisServer.new(interface, port) do |client, _, key|
+  begin
+    _, ip, field = key.split(":", 3)
+  rescue
+    Log.warn &.emit("Error parsing key", key: key)
+    next
+  end
+
+  # This is cached in memory
+  result = asn.query(ip)
+
+  next if result.nil?
+
+  # XXX: Are we going to use the other fields?
+  response =
+    case field
+    when ASN_ID then result.try(&.id).try(&.to_s)
+    when ASN_COUNTRY then result.try(&.country)
+    when ASN_DESCRIPTION then result.try(&.description)
+    when ASN_BLOCKED then
+      if result.try(&.blocked)
+        "1"
+      else
+        "0"
+      end
+    else nil
+    end
+
+  next if response.nil?
+
+  # Reply
+  RedisServer.bulk_string(client, response)
+end
+
+asn.close

src/models/access_log.cr

@@ -58,4 +58,6 @@ class AccessLog
   property sent_http_strict_transport_security : String
   property nginx_version : String
   property pid : String
+  property remote_addr : String?
+  property http3 : String?
 end

src/redis_server.cr

@@ -0,0 +1,59 @@
+require "log"
+require "socket"
+
+class RedisServer
+  BULK_STRING = "$"
+  CRLF = "\r\n"
+  NOT_IMPLEMENTED = "-Not implemented#{CRLF}"
+  QUIT_COMMAND = "quit"
+  GET_COMMAND = "get"
+
+  property server : TCPServer
+
+  def initialize(interface : String = "localhost", port : Int = 6379, &block : TCPSocket, String, String -> _)
+    @server = TCPServer.new(interface, port)
+
+    while (client = server.accept?)
+      spawn handle_client(client, block)
+    end
+  ensure
+    server.close
+  end
+
+  def handle_client(client : TCPSocket, block : Proc)
+    next_is_key = false
+    last_command = ""
+
+    while (line = client.gets)
+      # We're not a compliant RESP
+      next if line.starts_with?("*")
+      next if line.starts_with?("$")
+
+      # Execute the query when we get the key
+      if next_is_key
+        next_is_key = false
+
+        # Do something with the key
+        block.call(client, last_command, line)
+      # First we get the Redis command and we only support a small subset.
+      else
+        case (last_command = line.downcase)
+        when QUIT_COMMAND then client.close
+        when GET_COMMAND then next_is_key = true
+        else
+          client.print NOT_IMPLEMENTED
+
+          raise last_command
+        end
+      end
+    end
+  rescue ex
+    Log.warn &.emit("Error", exception: ex.class.name, error: ex.message)
+  ensure
+    client.close
+  end
+
+  def self.bulk_string(client : TCPSocket, string : String)
+    client.print(BULK_STRING, string.size, CRLF, string, CRLF)
+  end
+end

src/swd.cr

@@ -27,7 +27,7 @@ class SWD
   NETWORK_ENERGY = 0.14
   DATACENTER_ENERGY = 0.15
   PRODUCTION_ENERGY = 0.19
-  GLOBAL_GRID_INTENSITY = 437.66
+  GLOBAL_GRID_INTENSITY = 472.95
   RENEWABLES_GRID_INTENSITY = 50.0
 
   @transfered_bytes_to_gb : Float32? | Float64? = nil

src/swd/intensity_data.cr

@@ -2,215 +2,215 @@ class SWD
   module IntensityData
     # @see {co2.js/data/output/average-intensities.json}
     AVERAGE_INTENSITY_BY_ISO_CODE = {
-      "AE": 492.7,
-      "AF": 132.53,
+      "AE": 467.51,
+      "AF": 123.71,
       "AG": 611.11,
-      "AL": 24.29,
-      "AM": 264.54,
-      "AO": 174.73,
-      "AR": 353.96,
-      "AS": 611.11,
-      "AT": 110.78,
-      "AU": 556.3,
-      "AW": 561.22,
-      "AZ": 671.39,
-      "BA": 600.94,
-      "BB": 605.51,
-      "BD": 691.41,
-      "BE": 138.11,
-      "BF": 467.53,
-      "BG": 335.33,
-      "BH": 904.62,
-      "BI": 250.0,
-      "BJ": 584.07,
-      "BN": 893.91,
-      "BO": 531.69,
-      "BR": 96.4,
-      "BS": 660.1,
-      "BT": 23.33,
-      "BW": 847.91,
-      "BY": 441.74,
-      "BZ": 225.81,
-      "CA": 165.15,
-      "CD": 24.46,
+      "AL": 24.42,
+      "AM": 243.52,
+      "AO": 167.22,
+      "AR": 344.83,
+      "AS": 647.06,
+      "AT": 102.62,
+      "AU": 553.76,
+      "AW": 550.0,
+      "AZ": 632.89,
+      "BA": 638.05,
+      "BB": 600.0,
+      "BD": 694.63,
+      "BE": 117.58,
+      "BF": 554.91,
+      "BG": 264.21,
+      "BH": 902.41,
+      "BI": 230.77,
+      "BJ": 590.0,
+      "BN": 892.67,
+      "BO": 468.02,
+      "BR": 106.06,
+      "BS": 653.66,
+      "BT": 24.19,
+      "BW": 849.42,
+      "BY": 323.63,
+      "BZ": 155.56,
+      "CA": 184.99,
+      "CD": 27.04,
       "CF": 0.0,
-      "CG": 700.0,
-      "CH": 34.7,
-      "CI": 393.89,
+      "CG": 713.73,
+      "CH": 36.72,
+      "CI": 393.53,
       "CK": 250.0,
-      "CL": 291.11,
-      "CM": 305.42,
-      "CN": 583.61,
-      "CO": 259.51,
-      "CR": 53.38,
-      "CU": 637.61,
-      "CV": 558.14,
-      "CY": 526.02,
-      "CZ": 449.72,
-      "DE": 381.41,
-      "DJ": 692.31,
-      "DK": 151.65,
-      "DM": 529.41,
-      "DO": 580.78,
-      "DZ": 634.61,
-      "EC": 166.91,
-      "EE": 416.67,
-      "EG": 574.04,
-      "ER": 631.58,
-      "ES": 174.05,
-      "ET": 24.64,
-      "FI": 79.12,
-      "FJ": 288.46,
-      "FK": 500.0,
-      "FO": 404.76,
-      "FR": 56.02,
-      "GA": 491.6,
-      "GB": 228.25,
-      "GD": 640.0,
-      "GE": 167.59,
-      "GF": 217.82,
-      "GH": 484.0,
-      "GL": 178.57,
+      "CL": 265.52,
+      "CM": 285.71,
+      "CN": 557.5,
+      "CO": 285.8,
+      "CR": 63.01,
+      "CU": 638.98,
+      "CV": 480.0,
+      "CY": 512.24,
+      "CZ": 413.86,
+      "DE": 342.06,
+      "DJ": 450.0,
+      "DK": 143.3,
+      "DM": 600.0,
+      "DO": 565.97,
+      "DZ": 633.65,
+      "EC": 209.7,
+      "EE": 341.02,
+      "EG": 574.5,
+      "ER": 590.91,
+      "ES": 146.15,
+      "ET": 23.55,
+      "FI": 72.25,
+      "FJ": 278.26,
+      "FK": 1000.0,
+      "FO": 354.17,
+      "FR": 44.18,
+      "GA": 429.47,
+      "GB": 215.79,
+      "GD": 666.67,
+      "GE": 143.06,
+      "GF": 204.08,
+      "GH": 452.86,
+      "GL": 111.11,
       "GM": 666.67,
-      "GN": 236.84,
-      "GP": 500.0,
-      "GQ": 591.84,
-      "GR": 336.57,
-      "GT": 328.27,
-      "GU": 622.86,
+      "GN": 182.72,
+      "GP": 493.9,
+      "GQ": 605.1,
+      "GR": 319.76,
+      "GT": 272.66,
+      "GU": 611.11,
       "GW": 625.0,
-      "GY": 640.35,
-      "HK": 699.5,
-      "HN": 282.27,
-      "HR": 204.96,
-      "HT": 567.31,
-      "HU": 204.01,
+      "GY": 634.33,
+      "HK": 681.99,
+      "HN": 289.5,
+      "HR": 174.48,
+      "HT": 534.65,
+      "HU": 182.82,
       "ID": 682.43,
-      "IE": 282.98,
-      "IL": 582.93,
-      "IN": 713.01,
-      "IQ": 688.81,
-      "IR": 641.73,
-      "IS": 27.68,
-      "IT": 330.72,
-      "JM": 555.56,
-      "JO": 540.92,
-      "JP": 493.59,
-      "KE": 71.2,
-      "KG": 147.29,
-      "KH": 417.71,
-      "KI": 666.67,
+      "IE": 279.79,
+      "IL": 567.26,
+      "IN": 708.96,
+      "IQ": 689.4,
+      "IR": 648.68,
+      "IS": 28.33,
+      "IT": 287.75,
+      "JM": 561.25,
+      "JO": 539.21,
+      "JP": 483.73,
+      "KE": 84.83,
+      "KG": 152.65,
+      "KH": 497.46,
+      "KI": 500.0,
       "KM": 642.86,
       "KN": 636.36,
-      "KP": 389.59,
-      "KR": 432.11,
-      "KW": 649.16,
+      "KP": 344.26,
+      "KR": 415.65,
+      "KW": 637.24,
       "KY": 642.86,
-      "KZ": 821.9,
-      "LA": 265.51,
-      "LB": 599.01,
-      "LC": 666.67,
+      "KZ": 801.79,
+      "LA": 232.12,
+      "LB": 369.47,
+      "LC": 650.0,
       "LK": 509.78,
-      "LR": 227.85,
-      "LS": 20.0,
-      "LT": 160.07,
-      "LU": 105.26,
-      "LV": 123.99,
-      "LY": 818.69,
-      "MA": 624.45,
-      "MD": 643.46,
-      "ME": 418.09,
-      "MG": 436.44,
-      "MK": 539.55,
-      "ML": 408.0,
-      "MM": 436.92,
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       "TC": 653.85,
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       "VG": 647.06,
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-      "XK": 894.65,
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+      "ZA": 713.9,
+      "ZM": 111.0,
+      "ZW": 298.44
     }
 
     # @see {co2.js/data/output/marginal-intensities-2021.json}