[src/trunk]: src/tests/net/net Add basic tests for forwarding fragmented packets

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

details:   https://anonhg.NetBSD.org/src/rev/a34f21e2ef01
branches:  trunk
changeset: 351630:a34f21e2ef01
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Mon Feb 20 09:58:58 2017 +0000

description:
Add basic tests for forwarding fragmented packets

diffstat:

 tests/net/net/t_forwarding.sh |  76 ++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 75 insertions(+), 1 deletions(-)

diffs (130 lines):

diff -r 4fb5bc00cc77 -r a34f21e2ef01 tests/net/net/t_forwarding.sh
--- a/tests/net/net/t_forwarding.sh     Mon Feb 20 09:02:01 2017 +0000
+++ b/tests/net/net/t_forwarding.sh     Mon Feb 20 09:58:58 2017 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: t_forwarding.sh,v 1.19 2016/11/25 08:51:17 ozaki-r Exp $
+#      $NetBSD: t_forwarding.sh,v 1.20 2017/02/20 09:58:58 ozaki-r Exp $
 #
 # Copyright (c) 2015 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -47,6 +47,7 @@
 atf_test_case ipforwarding_fastforward_v4 cleanup
 atf_test_case ipforwarding_fastforward_v6 cleanup
 atf_test_case ipforwarding_misc cleanup
+atf_test_case ipforwarding_fragment_v4 cleanup
 
 ipforwarding_v4_head()
 {
@@ -78,6 +79,12 @@
        atf_set "require.progs" "rump_server"
 }
 
+ipforwarding_fragment_v4_head()
+{
+       atf_set "descr" "Tests for fragmented packet forwarding (IPv4)"
+       atf_set "require.progs" "rump_server"
+}
+
 setup_endpoint()
 {
        sock=${1}
@@ -150,6 +157,18 @@
        fi
 }
 
+prepare_file()
+{
+       local file=$1
+       local data="0123456789"
+
+       touch $file
+       for i in `seq 1 512`
+       do
+               echo $data >> $file
+       done
+}
+
 setup()
 {
        rump_server_start $SOCKSRC
@@ -398,6 +417,22 @@
        $DEBUG && rump.ifconfig -v shmif0
 }
 
+setup_mtu()
+{
+       local mtu=$1
+
+       export RUMP_SERVER=$SOCKFWD
+       atf_check -s exit:0 rump.ifconfig shmif0 mtu $mtu
+}
+
+disable_mtudisc()
+{
+       local mtu=$1
+
+       export RUMP_SERVER=$SOCKDST
+       atf_check -s exit:0 -o ignore rump.sysctl -w -q net.inet.ip.mtudisc=0
+}
+
 ipforwarding_v4_body()
 {
        setup
@@ -487,6 +522,37 @@
        return 0
 }
 
+ipforwarding_fragment_v4_body()
+{
+       setup
+       test_setup
+
+       setup_forwarding
+       test_setup_forwarding
+
+       prepare_file $HTML_FILE
+       start_httpd $SOCKDST $IP4DST
+       $DEBUG && rump.netstat -a
+       setup_mtu 1000
+       disable_mtudisc
+
+       extract_new_packets bus1 > ./out
+       extract_new_packets bus2 > ./out
+
+       test_http_get $IP4DST
+
+       # Packets of MTU size sent from the server
+       extract_new_packets bus2 > ./out
+       atf_check -s exit:0 -o match:'length 1514' cat ./out
+
+       # The packets are fragmented down to 1000
+       extract_new_packets bus1 > ./out
+       atf_check -s exit:0 -o match:'length 1010' cat ./out
+       atf_check -s exit:0 -o match:'length 538' cat ./out
+
+       teardown_interfaces
+}
+
 ipforwarding_v4_cleanup()
 {
        $DEBUG && dump
@@ -520,6 +586,13 @@
        cleanup
 }
 
+ipforwarding_fragment_v4_cleanup()
+{
+       $DEBUG && dump
+       stop_httpd
+       cleanup
+}
+
 atf_init_test_cases()
 {
        atf_add_test_case ipforwarding_v4
@@ -527,4 +600,5 @@
        atf_add_test_case ipforwarding_fastforward_v4
        atf_add_test_case ipforwarding_fastforward_v6
        atf_add_test_case ipforwarding_misc
+       atf_add_test_case ipforwarding_fragment_v4
 }