- Add tests for ratelimit.

testdata/pylib.tdir/pylib.lookup.conf

@@ -11,4 +11,4 @@ server:
 stub-zone:
 	name: "example.com."
 	stub-addr: "127.0.0.1@@TOPORT@"
-
+	stub-no-cache: yes

testdata/pylib.tdir/pylib.lookup.py

@@ -9,9 +9,11 @@ import time
 import unbound
 
 qname = "www.example.com"
+qname2 = "www2.example.com"
 qtype = unbound.RR_TYPE_A
 qclass = unbound.RR_CLASS_IN
 
+
 def create_context(config_file="ub.lookup.conf", asyncflag=False):
     """
     Create an unbound context to use for testing.
@@ -69,32 +71,6 @@ def test_async_resolve(ctx):
         print("Failed async resolve with: {}".format(retval))
 
 
-def test_ratelimit_fg_on(ctx):
-    """
-    Test resolving a ratelimited domain with a foreground worker.
-
-    """
-    ctx.set_option("ratelimit:", "1")
-    ctx.set_option("ratelimit-factor:", "0")
-    status, result = ctx.resolve(qname, qtype, qclass)
-    if status == 0 and result.was_ratelimited:
-        print("Ratelimit-fg-on: pass")
-    else:
-        print("Failed ratelimit-fg-on with: {}".format(status))
-
-
-def test_ratelimit_fg_off(ctx):
-    """
-    Test resolving a non-ratelimited domain with a foreground worker.
-
-    """
-    status, result = ctx.resolve(qname, qtype, qclass)
-    if status == 0 and result.havedata:
-        print("Ratelimit-fg-off: {}".format(result.data.address_list))
-    else:
-        print("Failed ratelimit-fg-off with: {}".format(status))
-
-
 def test_ratelimit_bg_on(ctx):
     """
     Test resolving a ratelimited domain with a background worker.
@@ -102,40 +78,32 @@ def test_ratelimit_bg_on(ctx):
     """
     ctx.set_option("ratelimit:", "1")
     ctx.set_option("ratelimit-factor:", "0")
-    cb_data = dict(done=False)
-    retval, async_id = ctx.resolve_async(qname, cb_data, callback, qtype, qclass)
-    while retval == 0 and not cb_data['done']:
-        time.sleep(0.1)
-        retval = ctx.process()
+    total_runs = 6
+    success_threshold = 4  # 2/3*total_runs
+    successes = 0
+    for i in range(total_runs):
+        cb_data = dict(done=False)
+        cb_data2 = dict(done=False)
+        retval, async_id = ctx.resolve_async(qname, cb_data, callback, qtype, qclass)
+        retval, async_id = ctx.resolve_async(qname2, cb_data2, callback, qtype, qclass)
 
-    if cb_data.get('was_ratelimited'):
+        while retval == 0 and not (cb_data['done'] and cb_data['done']):
+            time.sleep(0.1)
+            retval = ctx.process()
+
+        if bool(cb_data.get('was_ratelimited')) ^ bool(cb_data2.get('was_ratelimited')):
+            successes += 1
+        if successes >= success_threshold:
+            break
+        time.sleep(1)
+    if successes >= success_threshold:
         print("Ratelimit-bg-on: pass")
     else:
-        print("Failed ratelimit-bg-on with: {}".format(status))
-
-
-def test_ratelimit_bg_off(ctx):
-    """
-    Test resolving a non-ratelimited domain with a background worker.
-
-    """
-    cb_data = dict(done=False)
-    retval, async_id = ctx.resolve_async(qname, cb_data, callback, qtype, qclass)
-    while retval == 0 and not cb_data['done']:
-        time.sleep(0.1)
-        retval = ctx.process()
-
-    if cb_data.get('data'):
-        print("Ratelimit-bg-off: {}".format(cb_data['data'].address_list))
-    else:
-        print("Failed ratelimit-bg-off with: {}".format(status))
+        print("Failed ratelimit-bg-on")
 
 
 test_resolve(create_context())
 test_async_resolve(create_context(asyncflag=True))
-test_ratelimit_fg_on(create_context())
-test_ratelimit_fg_off(create_context())
 test_ratelimit_bg_on(create_context(asyncflag=True))
-test_ratelimit_bg_off(create_context(asyncflag=True))
 
 sys.exit(0)

testdata/pylib.tdir/pylib.test

@@ -42,30 +42,12 @@ else
 	echo "Not OK (async resolve)"
 	exit 1
 fi
-if grep "Ratelimit-fg-on: pass" outfile; then
-	:
-else
-	echo "Not OK (ratelimit-fg-on)"
-	exit 1
-fi
-if grep "Ratelimit-fg-off: \[.\?10.20.30.40.\?\]" outfile; then
-	:
-else
-	echo "Not OK (ratelimit-fg-off)"
-	exit 1
-fi
 if grep "Ratelimit-bg-on: pass" outfile; then
 	:
 else
 	echo "Not OK (ratelimit-bg-on)"
 	exit 1
 fi
-if grep "Ratelimit-bg-off: \[.\?10.20.30.40.\?\]" outfile; then
-	:
-else
-	echo "Not OK (ratelimit-bg-off)"
-	exit 1
-fi
 
 echo "OK"
 

testdata/pylib.tdir/pylib.testns

@@ -12,3 +12,12 @@ SECTION ANSWER
 www	IN	A	10.20.30.40
 ENTRY_END
 
+ENTRY_BEGIN
+MATCH opcode qtype qname
+REPLY QR AA NOERROR
+ADJUST copy_id
+SECTION QUESTION
+www2	IN	A
+SECTION ANSWER
+www2	IN	A	10.20.30.40
+ENTRY_END

testdata/ratelimit.tdir/ratelimit.conf

@@ -0,0 +1,29 @@
+server:
+	verbosity: 5
+	# num-threads: 1
+	interface: 127.0.0.1
+	port: @PORT@
+	use-syslog: no
+	directory: .
+	pidfile: "unbound.pid"
+	chroot: ""
+	username: ""
+	do-not-query-localhost: no
+
+	ratelimit: 1
+	ratelimit-factor: 0
+
+stub-zone:
+	name: "example.com."
+	stub-addr: "127.0.0.1@@TOPORT@"
+        stub-no-cache: yes
+
+remote-control:
+	control-enable: yes
+	control-interface: 127.0.0.1
+	# control-interface: ::1
+	control-port: @CONTROL_PORT@
+	server-key-file: "unbound_server.key"
+	server-cert-file: "unbound_server.pem"
+	control-key-file: "unbound_control.key"
+	control-cert-file: "unbound_control.pem"

testdata/ratelimit.tdir/ratelimit.dsc

@@ -0,0 +1,16 @@
+BaseName: ratelimit
+Version: 1.0
+Description: Test ratelimit.
+CreationDate: Sun Jan 30 00:40:00 CET 2022
+Maintainer: Yorgos Thessalonikefs
+Category:
+Component:
+CmdDepends:
+Depends:
+Help:
+Pre: ratelimit.pre
+Post: ratelimit.post
+Test: ratelimit.test
+AuxFiles:
+Passed:
+Failure:

testdata/ratelimit.tdir/ratelimit.post

@@ -0,0 +1,14 @@
+# #-- ratelimit.post --#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# source the test var file when it's there
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+#
+# do your teardown here
+. ../common.sh
+kill_pid $STUB_PID
+kill_pid $UNBOUND_PID
+if test -f unbound.log; then
+	echo ">>> unbound log"
+	cat unbound.log
+fi

testdata/ratelimit.tdir/ratelimit.pre

@@ -0,0 +1,33 @@
+# #-- ratelimit.pre--#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# use .tpkg.var.test for in test variable passing
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+
+PRE="../.."
+. ../common.sh
+get_random_port 2
+UNBOUND_PORT=$RND_PORT
+STUB_PORT=$(($RND_PORT + 1))
+CONTROL_PORT=$(($RND_PORT + 2))
+echo "UNBOUND_PORT=$UNBOUND_PORT" >> .tpkg.var.test
+echo "STUB_PORT=$STUB_PORT" >> .tpkg.var.test
+echo "CONTROL_PORT=$CONTROL_PORT" >> .tpkg.var.test
+
+# start ldns-testnd
+get_ldns_testns
+$LDNS_TESTNS -v -p $STUB_PORT ratelimit.testns >stub.log 2>&1 &
+STUB_PID=$!
+echo "STUB_PID=$STUB_PID" >> .tpkg.var.test
+
+# make config file
+sed -e 's/@PORT\@/'$UNBOUND_PORT'/' -e 's/@TOPORT\@/'$STUB_PORT'/' -e 's/@CONTROL_PORT\@/'$CONTROL_PORT'/' < ratelimit.conf > ub.conf
+# start unbound in the background
+$PRE/unbound -d -c ub.conf >unbound.log 2>&1 &
+UNBOUND_PID=$!
+echo "UNBOUND_PID=$UNBOUND_PID" >> .tpkg.var.test
+
+wait_ldns_testns_up stub.log
+wait_unbound_up unbound.log
+
+cat .tpkg.var.test

testdata/ratelimit.tdir/ratelimit.test

@@ -0,0 +1,183 @@
+# #-- ratelimit.test --#
+# source the master var file when it's there
+[ -f ../.tpkg.var.master ] && source ../.tpkg.var.master
+# use .tpkg.var.test for in test variable passing
+[ -f .tpkg.var.test ] && source .tpkg.var.test
+
+PRE="../.."
+. ../common.sh
+
+get_make
+(cd $PRE; $MAKE streamtcp)
+
+# These tests rely on second time precision. To combat false negatives the
+# tests run multiple times and we allow 1/3 of the runs to fail.
+total_runs=6
+success_threshold=4  # 2/3*total_runs
+
+successes=0
+echo "> Three parallel queries"
+# For this test we send three parallel queries and we expect only one of them
+# to be allowed through each second.
+for i in $(seq 1 $total_runs); do
+	$PRE/streamtcp -na -f 127.0.0.1@$UNBOUND_PORT www1.example.com. A IN www2.example.com. A IN www3.example.com. A IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	cat outfile
+	if test `grep "rcode: SERVFAIL" outfile | wc -l` -eq 2; then
+		((successes++))
+	fi
+	# We don't have to wait for all the runs to complete if we know
+	# we passed the threshold.
+	if test $successes -ge $success_threshold; then
+		break
+	fi
+	sleep 1
+done
+if test $successes -ge $success_threshold; then
+	echo "Number of ratelimited queries OK for three parallel queries"
+else
+	echo "Number of ratelimited queries not OK for three parallel queries"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Number of ratelimited queries not OK for three parallel queries"
+	exit 1
+fi
+
+echo "> Activating ratelimit-factor"
+echo "$PRE/unbound-control -c ub.conf set_option ratelimit-factor: 3"
+$PRE/unbound-control -c ub.conf set_option ratelimit-factor: 3
+if test $? -ne 0; then
+	echo "wrong exit value after success"
+	exit 1
+fi
+
+slipped_through=0
+echo "> Three parallel queries with ratelimit-factor"
+# For this test we send three parallel queries and we expect at least two of
+# them to be allowed through at a given second; one from the ratelimit itself
+# and one from the ratelimit-factor.
+for i in {1..10}; do
+	$PRE/streamtcp -na -f 127.0.0.1@$UNBOUND_PORT www1.example.com. A IN www2.example.com. A IN www3.example.com. A IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	cat outfile
+	if test `grep "rcode: SERVFAIL" outfile | wc -l` -lt 2; then
+		slipped_through=1
+		break
+	fi
+	sleep 2
+done
+if test $slipped_through -eq 0; then
+	echo "ratelimit-factor did not work"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "ratelimit-factor did not work"
+	exit 1
+fi
+echo "ratelimit-factor OK"
+
+echo "> Disabling ratelimit-factor"
+echo "$PRE/unbound-control -c ub.conf set_option ratelimit-factor: 0"
+$PRE/unbound-control -c ub.conf set_option ratelimit-factor: 0
+if test $? -ne 0; then
+	echo "wrong exit value after success"
+	exit 1
+fi
+echo "> Activating ratelimit-backoff"
+echo "$PRE/unbound-control -c ub.conf set_option ratelimit-backoff: yes"
+$PRE/unbound-control -c ub.conf set_option ratelimit-backoff: yes
+if test $? -ne 0; then
+	echo "wrong exit value after success"
+	exit 1
+fi
+
+successes=0
+echo "> Three parallel queries with backoff"
+# For this test we send three parallel queries. The ratelimit should be reached
+# for that second. Then for the next second we again send three parallel
+# queries and we expect none of them to be allowed through because of the
+# backoff logic that keeps rolling the RATE_WINDOW based on demand.
+for i in $(seq 1 $total_runs); do
+	$PRE/streamtcp -na -f 127.0.0.1@$UNBOUND_PORT www1.example.com. A IN www2.example.com. A IN www3.example.com. A IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	sleep 1  # Limit is reached; it should also be active for the next second
+	$PRE/streamtcp -na -f 127.0.0.1@$UNBOUND_PORT www1.example.com. A IN www2.example.com. A IN www3.example.com. A IN >outfile 2>&1
+	if test "$?" -ne 0; then
+		echo "exit status not OK"
+		echo "> cat logfiles"
+		cat outfile
+		cat unbound.log
+		echo "Not OK"
+		exit 1
+	fi
+	cat outfile
+	if test `grep "rcode: SERVFAIL" outfile | wc -l` -eq 3; then
+		((successes++))
+	fi
+	# We don't have to wait for all the runs to complete if we know
+	# we passed the threshold.
+	if test $successes -ge $success_threshold; then
+		break
+	fi
+done
+
+if test $successes -ge $success_threshold; then
+	echo "three parallel queries with backoff OK"
+else
+	echo "Number of ratelimited queries not OK for three parallel queries with backoff"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Number of ratelimited queries not OK for three parallel queries with backoff"
+	exit 1
+fi
+
+echo "> Three parallel queries after backoff RATE_WINDOW"
+sleep 3  # Make sure the RATE_WINDOW is renewed
+# For this test we make three parallel queries after the RATE_WINDOW has passed
+# without any new demand and we expect at least one query to pass through. This
+# is to check that the backoff logic does not insist on past (outside of
+# RATE_WINDOW) limits.
+$PRE/streamtcp -na -f 127.0.0.1@$UNBOUND_PORT www1.example.com. A IN www2.example.com. A IN www3.example.com. A IN >outfile 2>&1
+if test "$?" -ne 0; then
+	echo "exit status not OK"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Not OK"
+	exit 1
+fi
+cat outfile
+if test `grep "rcode: NOERROR" outfile | wc -l` -gt 0; then
+	echo "Number of ratelimited queries OK for three parallel queries after backoff RATE_WINDOW"
+else
+	echo "Number of ratelimited queries not OK for three parallel queries after backoff RATE_WINDOW"
+	echo "> cat logfiles"
+	cat outfile
+	cat unbound.log
+	echo "Number of ratelimited queries not OK for three parallel queries after backoff RATE_WINDOW"
+	exit 1
+fi
+exit 0

testdata/ratelimit.tdir/ratelimit.testns

@@ -0,0 +1,13 @@
+; nameserver test file
+$ORIGIN example.com.
+$TTL 3600
+
+ENTRY_BEGIN
+MATCH opcode qtype
+REPLY QR AA NOERROR
+ADJUST copy_id copy_query
+SECTION QUESTION
+wild	IN	A
+SECTION ANSWER
+wild	IN	A	10.20.30.40
+ENTRY_END

testdata/ratelimit.tdir/unbound_control.key

@@ -0,0 +1,39 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIG4gIBAAKCAYEAstEp+Pyh8XGrtZ77A4FhYjvbeB3dMa7Q2rGWxobzlA9przhA
+1aChAvUtCOAuM+rB6NTNB8YWfZJbQHawyMNpmC77cg6vXLYCGUQHZyAqidN049RJ
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+C1TpXebHGyXGpY9WdWXhjdE/1jPvfS+uO5WyuDpYPr339gsdq1g=
+-----END RSA PRIVATE KEY-----

testdata/ratelimit.tdir/unbound_control.pem

@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDszCCAhsCFGD5193whHQ2bVdzbaQfdf1gc4SkMA0GCSqGSIb3DQEBCwUAMBIx
+EDAOBgNVBAMMB3VuYm91bmQwHhcNMjAwNzA4MTMzMjMwWhcNNDAwMzI1MTMzMjMw
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+-----END CERTIFICATE-----

testdata/ratelimit.tdir/unbound_server.key

@@ -0,0 +1,39 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----

testdata/ratelimit.tdir/unbound_server.pem

@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----