DRiKE

struct dnshdr {
    uint16_t id;
    union {
        struct {
            uint8_t  rd     : 1;
            uint8_t  tc     : 1;
            uint8_t  aa     : 1;
            uint8_t  opcode : 4;
            uint8_t  qr     : 1;
 

DRiKE

#
# A fastbike could be a racing bike or a speed pedelec.
# But also at night or in rainy whether you might want
# to fallback to this one.
#
# Structure is similar to trekking.brf, see this for documenation.
# 

---context:global   # following code refers to global config

DRiKE

static __always_inline
void csum_remove_data(uint32_t *csum, struct cursor *c, uint16_t len)
{
    if (c->pos + len <= c->end) {
        *csum = bpf_csum_diff(c->pos, len, 0, 0, *csum);
        c->pos += len;
    }
}

int xdp_dns_says_no(struct xdp_md *ctx)