icmp46_header_t *icmp;
ip_csum_t csum;
int rv;
+ ip6_address_t old_src, old_dst;
ip6 = vlib_buffer_get_current (p);
ip6_pay_len = clib_net_to_host_u16 (ip6->payload_length);
return -1;
}
- csum = *inner_L4_checksum;
- csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[1]);
- csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[1]);
- *inner_L4_checksum = ip_csum_fold (csum);
+ old_src.as_u64[0] = inner_ip6->src_address.as_u64[0];
+ old_src.as_u64[1] = inner_ip6->src_address.as_u64[1];
+ old_dst.as_u64[0] = inner_ip6->dst_address.as_u64[0];
+ old_dst.as_u64[1] = inner_ip6->dst_address.as_u64[1];
if ((rv = inner_fn (inner_ip6, inner_ip4, inner_ctx)) != 0)
return rv;
{
//Update to new pseudo-header
csum = *inner_L4_checksum;
+ csum = ip_csum_sub_even (csum, old_src.as_u64[0]);
+ csum = ip_csum_sub_even (csum, old_src.as_u64[1]);
+ csum = ip_csum_sub_even (csum, old_dst.as_u64[0]);
+ csum = ip_csum_sub_even (csum, old_dst.as_u64[1]);
csum = ip_csum_add_even (csum, inner_ip4->src_address.as_u32);
csum = ip_csum_add_even (csum, inner_ip4->dst_address.as_u32);
*inner_L4_checksum = ip_csum_fold (csum);
u8 l4_protocol;
u16 l4_offset;
int rv;
+ ip6_address_t old_src, old_dst;
ip6 = vlib_buffer_get_current (p);
{
udp_header_t *udp = ip6_next_header (ip6);
checksum = &udp->checksum;
- //UDP checksum is optional over IPv4
- if (!udp_checksum)
- goto no_csum;
}
- csum = ip_csum_sub_even (*checksum, ip6->src_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, ip6->src_address.as_u64[1]);
- csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[1]);
- *checksum = ip_csum_fold (csum);
+ old_src.as_u64[0] = ip6->src_address.as_u64[0];
+ old_src.as_u64[1] = ip6->src_address.as_u64[1];
+ old_dst.as_u64[0] = ip6->dst_address.as_u64[0];
+ old_dst.as_u64[1] = ip6->dst_address.as_u64[1];
-no_csum:
ip4 = (ip4_header_t *) u8_ptr_add (ip6, l4_offset - sizeof (*ip4));
vlib_buffer_advance (p, l4_offset - sizeof (*ip4));
}
else
{
- csum = ip_csum_add_even (*checksum, ip4->dst_address.as_u32);
+ csum = ip_csum_sub_even (*checksum, old_src.as_u64[0]);
+ csum = ip_csum_sub_even (csum, old_src.as_u64[1]);
+ csum = ip_csum_sub_even (csum, old_dst.as_u64[0]);
+ csum = ip_csum_sub_even (csum, old_dst.as_u64[1]);
+ csum = ip_csum_add_even (csum, ip4->dst_address.as_u32);
csum = ip_csum_add_even (csum, ip4->src_address.as_u32);
*checksum = ip_csum_fold (csum);
}