static int rrl_classify(char *dst, size_t maxlen, const struct sockaddr_storage *a,
rrl_req_t *p, const zone_t *z, uint32_t seed)
{
if (!dst || !p || !a || maxlen == 0) {
return KNOT_EINVAL;
}
/* Class */
uint8_t cls = rrl_clsid(p);
*dst = cls;
int blklen = sizeof(cls);
/* Address (in network byteorder, adjust masks). */
uint64_t nb = 0;
if (a->ss_family == AF_INET6) {
struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)a;
nb = *((uint64_t*)(&ipv6->sin6_addr)) & RRL_V6_PREFIX;
} else {
struct sockaddr_in *ipv4 = (struct sockaddr_in *)a;
nb = ((uint32_t)ipv4->sin_addr.s_addr) & RRL_V4_PREFIX;
}
if (blklen + sizeof(nb) > maxlen) return KNOT_ESPACE;
memcpy(dst + blklen, (void*)&nb, sizeof(nb));
blklen += sizeof(nb);
/* Name */
uint16_t *nlen = (uint16_t*)(dst + blklen);
blklen += sizeof(uint16_t);
int len = rrl_clsname(dst + blklen, maxlen - blklen, cls, p, z);
if (len < 0)
return len;
*nlen = len;
blklen += len;
/* Seed. */
if (blklen + sizeof(seed) > maxlen) return KNOT_ESPACE;
if (memcpy(dst + blklen, (void*)&seed, sizeof(seed)) == 0) {
blklen += sizeof(seed);
}
return blklen;
}
static int rrl_classify(char *dst, size_t maxlen, const sockaddr_t *a,
rrl_req_t *p, const knot_zone_t *z, uint32_t seed)
{
if (!dst || !p || !a || maxlen == 0) {
return KNOT_EINVAL;
}
/* Class */
uint8_t cls = rrl_clsid(p);
*dst = cls;
int blklen = sizeof(cls);
/* Address (in network byteorder, adjust masks). */
uint64_t nb = 0;
if (sockaddr_family(a) == AF_INET6) { /* Take the /56 prefix. */
nb = *((uint64_t*)&a->addr6.sin6_addr) & RRL_V6_PREFIX;
} else { /* Take the /24 prefix */
nb = (uint32_t)a->addr4.sin_addr.s_addr & RRL_V4_PREFIX;
}
if (blklen + sizeof(nb) > maxlen) return KNOT_ESPACE;
memcpy(dst + blklen, (void*)&nb, sizeof(nb));
blklen += sizeof(nb);
/* Name */
uint16_t *nlen = (uint16_t*)(dst + blklen);
blklen += sizeof(uint16_t);
int len = rrl_clsname(dst + blklen, maxlen - blklen, cls, p, z);
if (len < 0) return len;
*nlen = len;
blklen += len;
/* Seed. */
if (blklen + sizeof(seed) > maxlen) return KNOT_ESPACE;
if (memcpy(dst + blklen, (void*)&seed, sizeof(seed)) == 0) {
blklen += sizeof(seed);
}
return blklen;
}
