diff options
Diffstat (limited to 'src/vnet/ip/ip4_to_ip6.h')
| -rw-r--r-- | src/vnet/ip/ip4_to_ip6.h | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/vnet/ip/ip4_to_ip6.h b/src/vnet/ip/ip4_to_ip6.h index 965d27c3393..dad35230b12 100644 --- a/src/vnet/ip/ip4_to_ip6.h +++ b/src/vnet/ip/ip4_to_ip6.h @@ -367,11 +367,15 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx, sizeof (*inner_frag)); } - csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[0]); - csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[1]); - csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[0]); - csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[1]); - *inner_L4_checksum = ip_csum_fold (csum); + /* UDP checksum is optional */ + if (csum) + { + csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[0]); + csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[1]); + csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[0]); + csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[1]); + *inner_L4_checksum = ip_csum_fold (csum); + } } else { |