[src/trunk]: src/tests/net/ndp Add tests for GC of neighbor caches

[ozaki-r <ozaki-r%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/bf77b74a91cc
branches:  trunk
changeset: 341679:bf77b74a91cc
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Tue Nov 17 06:44:13 2015 +0000

description:
Add tests for GC of neighbor caches

diffstat:

 tests/net/ndp/t_ndp.sh |  78 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 77 insertions(+), 1 deletions(-)

diffs (116 lines):

diff -r 6b1d233935f6 -r bf77b74a91cc tests/net/ndp/t_ndp.sh
--- a/tests/net/ndp/t_ndp.sh    Tue Nov 17 01:07:34 2015 +0000
+++ b/tests/net/ndp/t_ndp.sh    Tue Nov 17 06:44:13 2015 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: t_ndp.sh,v 1.6 2015/08/18 00:58:35 ozaki-r Exp $
+#      $NetBSD: t_ndp.sh,v 1.7 2015/11/17 06:44:13 ozaki-r Exp $
 #
 # Copyright (c) 2015 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -40,6 +40,7 @@
 atf_test_case cache_expiration cleanup
 atf_test_case command cleanup
 atf_test_case cache_overwriting cleanup
+atf_test_case neighborgcthresh cleanup
 
 cache_expiration_head()
 {
@@ -59,6 +60,12 @@
        atf_set "require.progs" "rump_server"
 }
 
+neighborgcthresh_head()
+{
+       atf_set "descr" "Tests for GC of neighbor caches"
+       atf_set "require.progs" "rump_server"
+}
+
 setup_dst_server()
 {
        export RUMP_SERVER=$SOCKDST
@@ -230,6 +237,68 @@
        return 0
 }
 
+get_n_caches()
+{
+
+       echo $(rump.ndp -a -n |grep -v -e Neighbor -e permanent |wc -l)
+}
+
+neighborgcthresh_body()
+{
+
+       atf_check -s exit:0 ${inetserver} $SOCKSRC
+       atf_check -s exit:0 ${inetserver} $SOCKDST
+
+       setup_dst_server
+       setup_src_server
+
+       export RUMP_SERVER=$SOCKDST
+       for i in $(seq 0 9); do
+               atf_check -s exit:0 rump.ifconfig shmif0 inet6 ${IP6DST}$i
+       done
+
+       export RUMP_SERVER=$SOCKSRC
+
+       # ping to 3 destinations
+       $DEBUG && rump.ndp -n -a
+       for i in $(seq 0 2); do
+               atf_check -s exit:0 -o ignore rump.ping6 -n -X $TIMEOUT -c 1 \
+                   ${IP6DST}$i
+       done
+       $DEBUG && rump.ndp -n -a
+
+       # 3 caches should be created
+       atf_check_equal $(get_n_caches) 3
+
+       # ping to additional 3 destinations
+       for i in $(seq 3 5); do
+               atf_check -s exit:0 -o ignore rump.ping6 -n -X $TIMEOUT -c 1 \
+                   ${IP6DST}$i
+       done
+       $DEBUG && rump.ndp -n -a
+
+       # 6 caches should be created in total
+       atf_check_equal $(get_n_caches) 6
+
+       # Limit the number of neighbor caches to 5
+       atf_check -s exit:0 -o ignore rump.sysctl -w \
+           net.inet6.ip6.neighborgcthresh=5
+
+       # ping to additional 4 destinations
+       for i in $(seq 6 9); do
+               atf_check -s exit:0 -o ignore rump.ping6 -n -X $TIMEOUT -c 1 \
+                   ${IP6DST}$i
+       done
+
+       # More than 5 caches should be created in total, but exceeded caches
+       # should be GC-ed
+       if [ "$(get_n_caches)" -gt 5 ]; then
+               atf_fail "Neighbor caches are not GC-ed"
+       fi
+
+       return 0
+}
+
 cleanup()
 {
        env RUMP_SERVER=$SOCKSRC rump.halt
@@ -281,9 +350,16 @@
        cleanup
 }
 
+neighborgcthresh_cleanup()
+{
+       $DEBUG && dump
+       cleanup
+}
+
 atf_init_test_cases()
 {
        atf_add_test_case cache_expiration
        atf_add_test_case command
        atf_add_test_case cache_overwriting
+       atf_add_test_case neighborgcthresh
 }