hint blocked IPs about missing UA

[nominatim.git] / utils / cron_banip.py

diff --git a/utils/cron_banip.py b/utils/cron_banip.py
index 54b7ae8c282f0969c06318a30cdd3716f6e07edb..17268bc15a48f0d49b90108442a6d9eca9c0b9ea 100755 (executable)
--- a/utils/cron_banip.py
+++ b/utils/cron_banip.py
@@ -52,6 +52,9 @@ LOGFILE= BASEDIR + '/log/restricted_ip.log'
 WHITELIST = ''
 # space-separated list of IPs manually blocked
 BLACKLIST = ''
+# user-agents that should be blocked from bulk mode
+# (matched with startswith)
+UA_BLOCKLIST = ()
 
 # time before a automatically blocked IP is allowed back
 BLOCKCOOLOFF_PERIOD='1 hour'
@@ -62,9 +65,10 @@ BULKLONG_LIMIT=8000
 BULKSHORT_LIMIT=2000
 BLOCK_UPPER=19000
 BLOCK_LOWER=4000
-BLOCK_LOADFAC=300
-BULK_LOADFAC=100
+BLOCK_LOADFAC=380
+BULK_LOADFAC=160
 BULK_LOWER=1500
+MAX_BULK_IPS=85
 
 #
 # END OF DEFAULT SETTINGS
@@ -75,11 +79,6 @@ try:
 except IOError:
     pass
 
-# determine current load
-fd = open("/proc/loadavg")
-avgload = int(float(fd.readline().split()[2]))
-fd.close()
-
 # read the previous blocklist
 WHITELIST = set(WHITELIST.split()) if WHITELIST else set()
 prevblocks = []
@@ -101,25 +100,31 @@ try:
 except IOError:
     pass #ignore non-existing file
 
-# current number of bulks
-numbulks = len(prevbulks)
-
-BLOCK_LIMIT = max(BLOCK_LOWER, BLOCK_UPPER - BLOCK_LOADFAC * (numbulks - 27))
-BULKLONG_LIMIT = max(BULK_LOWER, BULKLONG_LIMIT - BULK_LOADFAC * (avgload - 14))
-
+# determine current load
+fd = open("/proc/loadavg")
+avgload = int(float(fd.readline().split()[2]))
+fd.close()
+# DB load
 conn = psycopg2.connect('dbname=nominatim')
 cur = conn.cursor()
+cur.execute("select count(*)/60 from new_query_log where starttime > now() - interval '1min'")
+dbload = int(cur.fetchone()[0])
+
+BLOCK_LIMIT = max(BLOCK_LOWER, BLOCK_UPPER - BLOCK_LOADFAC * (dbload - 75))
+BULKLONG_LIMIT = max(BULK_LOWER, BULKLONG_LIMIT - BULK_LOADFAC * (avgload - 14))
+if len(prevbulks) > MAX_BULK_IPS:
+    BLOCK_LIMIT = max(3600, BLOCK_LOWER - (len(prevbulks) - MAX_BULK_IPS)*10)
 
 # get the new block candidates
 cur.execute("""
-  SELECT ipaddress, max(count) FROM
+  SELECT ipaddress, max(count), max(ua) FROM
    ((SELECT * FROM
-     (SELECT ipaddress, sum(case when endtime is null then 1 else 1+date_part('epoch',endtime-starttime) end) as count FROM new_query_log
+     (SELECT ipaddress, sum(case when endtime is null then 1 else 1+1.5*date_part('epoch',endtime-starttime) end) as count, substring(max(useragent) from 1 for 30) as ua FROM new_query_log
       WHERE starttime > now() - interval '1 hour' GROUP BY ipaddress) as i
    WHERE count > %s)
    UNION
-   (SELECT ipaddress, count * 4 FROM
-     (SELECT ipaddress, sum(case when endtime is null then 1 else 1+date_part('epoch',endtime-starttime) end) as count FROM new_query_log 
+   (SELECT ipaddress, count * 3, ua FROM
+     (SELECT ipaddress, sum(case when endtime is null then 1 else 1+1.5*date_part('epoch',endtime-starttime) end) as count, substring(max(useragent) from 1 for 30) as ua FROM new_query_log 
       WHERE starttime > now() - interval '10 min' GROUP BY ipaddress) as i
    WHERE count > %s)) as o
   GROUP BY ipaddress
@@ -127,12 +132,22 @@ cur.execute("""
 
 bulkips = {}
 emergencyblocks = []
+useragentblocks = []
 
 for c in cur:
     if c[0] not in WHITELIST and c[0] not in BLACKLIST:
-        if c[1] > BLOCK_UPPER and c[0] not in prevbulks:
+        # check for user agents that receive an immediate block
+        missing_agent = not c[2]
+        if not missing_agent:
+            for ua in UA_BLOCKLIST:
+                if c[2].startswith(ua):
+                    missing_agent = True
+                    break
+        if (missing_agent or c[1] > BLOCK_UPPER) and c[0] not in prevblocks:
             newblocks.add(c[0])
-            if c[0] not in prevblocks:
+            if missing_agent:
+                useragentblocks.append(c[0])
+            else:
                 emergencyblocks.append(c[0])
         else:
             bulkips[c[0]] = c[1]
@@ -215,6 +230,8 @@ if bulkips:
     fd.write(logstr % ('new bulks:', ', '.join(bulkips.keys())))
 if emergencyblocks:
     fd.write(logstr % ('dir.block:', ', '.join(emergencyblocks)))
+if useragentblocks:
+    fd.write(logstr % (' ua block:', ', '.join(useragentblocks)))
 if newlyblocked:
     fd.write(logstr % ('new block:', ', '.join(newlyblocked)))
 fd.close()