ggsn: Expect no linklocal-addr forwarding when testing open5gs
It's not really clear whether GTP should really be forwarding packets
with link-local address outside the tunnel. In theory the link-local
address should be used to communicate with the GGSN in order to get the
global link address, that's it. Running against open5gs it can be
observed that they are not forwarded, while osmo-ggsn forwards them
correctly.
Since it seems more like an implementation dependent detail, let's
accept any and adapt expectancies depending on what are we testing, this
way it ends up documented the current situation in case it ever changes
in the future.
Change-Id: Ieafd24c059b9341c702311c78caad3312db5f1f3
diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index 0d134f6..3b34c7f 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -995,7 +995,11 @@
/* Check if we can use valid link-local src addr. */
var OCT16 saddr_ll := f_ipv6_link_local(ctx.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
f_send_gtpu(ctx, f_gen_icmpv6_echo(saddr_ll, dns1_addr));
- f_wait_icmp6_echo_reply(ctx);
+ if (m_ggsn_impl == GGSN_IMPL_OSMOCOM) {
+ f_wait_icmp6_echo_reply(ctx);
+ } else {
+ f_wait_gtpu_fail(ctx);
+ }
/* Check that attempting RA with another ll src addr won't work, packet dropped: */
var OCT16 saddr_ll_wrong := f_ipv6_mangle(saddr_ll, 8);