From 035ea679d54700aee9fb86a8de436330bc8e3bc2 Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Thu, 7 Mar 2019 16:18:55 -0500 Subject: parse ethernet header in ct6_in2out fix a debug CLI scripting bug: cp_ip6_address_add_del_command_function ate any subsequent commands, yielding indigestion. Change-Id: Iaca7bed5687759da36ae91dc658e758549b71796 Signed-off-by: Dave Barach --- src/plugins/ct6/ct6_in2out.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'src/plugins/ct6/ct6_in2out.c') diff --git a/src/plugins/ct6/ct6_in2out.c b/src/plugins/ct6/ct6_in2out.c index b28d349dd29..4f2ebae60cf 100644 --- a/src/plugins/ct6/ct6_in2out.c +++ b/src/plugins/ct6/ct6_in2out.c @@ -235,7 +235,10 @@ ct6_in2out_inline (vlib_main_t * vm, /* * This is an output feature which runs at the last possible - * moment. Assume an ethernet header. + * moment. Assume an ethernet header. Make sure the packet is + * actually ipv6 before we do anything else. + * + * Unfortunately, we have to re-parse the L2 header. */ e0 = vlib_buffer_get_current (b[0]); @@ -245,6 +248,18 @@ ct6_in2out_inline (vlib_main_t * vm, delta0 += (e0->type == clib_net_to_host_u16 (ETHERNET_TYPE_DOT1AD)) ? 8 : 0; + if (PREDICT_TRUE (delta0 == sizeof (*e0))) + { + if (e0->type != clib_host_to_net_u16 (ETHERNET_TYPE_IP6)) + goto trace0; + } + else + { + u16 *tagged_etype_ptr = vlib_buffer_get_current (b[0]) + delta0 - 2; + if (*tagged_etype_ptr != clib_host_to_net_u16 (ETHERNET_TYPE_IP6)) + goto trace0; + } + ip0 = (ip6_header_t *) (vlib_buffer_get_current (b[0]) + delta0); /* -- cgit 1.2.3-korg