flowspec_cmp
if (flowspec_cmp(a, alen, b, blen, is_v6) != -1 ||
flowspec_cmp(b, blen, a, alen, is_v6) != 1)
int flowspec_cmp(const uint8_t *, int, const uint8_t *, int, int);
return flowspec_cmp(a->flow->data, a->flow->len,
return flowspec_cmp(af->flow, af->len - PT_FLOW_SIZE,