diff options
Diffstat (limited to 'src/plugins/ct6/ct6_in2out.c')
| -rw-r--r-- | src/plugins/ct6/ct6_in2out.c | 17 |
1 files changed, 16 insertions, 1 deletions
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); /* |