Check that path MTU discovery across routing domains inserts a

dynamic IPv4 route.  Add IPv6 test that runs tcpbench over pair
interfaces in different routing domains.  For that setup, PMTU
currently does not work.  IPv6 TCP packets get fragmented.

diff --git a/regress/sys/net/pair/Makefile b/regress/sys/net/pair/Makefile
index a0a95d0..147fcb7 100644 (file)
--- a/regress/sys/net/pair/Makefile
+++ b/regress/sys/net/pair/Makefile
@@ -1,4 +1,4 @@
-#      $OpenBSD: Makefile,v 1.1 2021/02/05 14:12:17 bluhm Exp $
+#      $OpenBSD: Makefile,v 1.2 2021/04/21 10:18:35 bluhm Exp $
 
 # Copyright (c) 2021 Alexander Bluhm <bluhm@openbsd.org>
 #
@@ -161,14 +161,34 @@ run-ping6-$f-$t:
 REGRESS_TARGETS +=     run-tcpbench-$f-$t
 run-tcpbench-$f-$t:
        rm -f nc.log
-       nc -v -l -V ${N$t} ${IP_${N$t}} 12345 >/dev/null 2>nc.log &
+       nc -4 -v -l -V ${N$t} ${IP_${N$t}} 12345 >/dev/null 2>nc.log &
        # Wait until nc is listening.
        for  i in `jot 30`; do\
            if fgrep -q Listening nc.log; then break; fi; sleep .1; done
        fgrep Listening nc.log
        # Test that path MTU dicovery is working.
-       tcpbench -t 5 -V ${N$f} -b ${IP_${N$f}} ${IP_${N$t}}
-       route -T ${N$f} -n get ${IP_${N$t}}
+       tcpbench -4 -t 5 -V ${N$f} -b ${IP_${N$f}} ${IP_${N$t}}
+.if $f == "3" && $t == "1"
+       # path MTU discovery must create a dynamic route
+       route -T ${N$f} -n get -host -inet ${IP_${N$t}} | grep DYNAMIC
+.endif
+
+REGRESS_TARGETS +=     run-tcpbench6-$f-$t
+run-tcpbench6-$f-$t:
+       rm -f nc.log
+       nc -6 -v -l -V ${N$t} ${IP6_${N$t}} 12345 >/dev/null 2>nc.log &
+       # Wait until nc is listening.
+       for  i in `jot 30`; do\
+           if fgrep -q Listening nc.log; then break; fi; sleep .1; done
+       fgrep Listening nc.log
+       # Test that path MTU dicovery is working.
+       tcpbench -6 -t 5 -V ${N$f} -b ${IP6_${N$f}} ${IP6_${N$t}}
+.if $f == "3" && $t == "1"
+       # path MTU discovery in other rtable does not work in ip6_output()
+       route -T ${N$f} -n get -host -inet6 ${IP6_${N$t}}
+       @echo DISABLED
+.endif
+
 .endfor
 .endfor