}
else
{
- ip4_header_t *fip = vlib_buffer_get_current (b0);
- const u32 fragment_first = ip4_get_fragment_offset_bytes (fip);
+ const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
const u32 fragment_length =
- clib_net_to_host_u16 (fip->length) - ip4_header_bytes (fip);
+ clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
const u32 fragment_last = fragment_first + fragment_length - 1;
- if (fragment_first > fragment_last
- || fragment_first + fragment_length > UINT16_MAX - 20)
+ if (fragment_first > fragment_last || fragment_first + fragment_length > UINT16_MAX - 20 || (fragment_length < 8 && ip4_get_fragment_more (ip0))) // 8 is minimum frag length per RFC 791
{
next0 = IP4_REASSEMBLY_NEXT_DROP;
error0 = IP4_ERROR_REASS_MALFORMED_PACKET;