uint8_t query_is_compressed(char *buffer, uint16_t len)
{
char *name;
struct dns_hdr *hdr;
hdr = (struct dns_hdr *) buffer;
if (!(name = jump_end_query(buffer, GET_16(&hdr->qdcount), len)))
return (0);
return ((*name & COMPRESS_FLAG_CHAR) == COMPRESS_FLAG_CHAR);
}
static int build_ressources_reply(t_conf *conf, void *buffer,
int max_len)
{
struct dns_hdr *hdr;
t_list *list;
void *where;
char buffer2[MAX_REQ_LEN];
hdr = buffer;
hdr->ra = 1;
hdr->qr = 1;
if (!(where = jump_end_query(buffer, GET_16(&hdr->qdcount), max_len)))
return (-1);
for (list = conf->ressources; list; list = list->next)
{
base64_encode(list->data, buffer2, (strchr(list->data, ':') - list->data));
where = add_reply(hdr, where, TYPE_KEY, buffer2);
}
return (where - buffer);
}
int build_error_reply(t_conf *conf, void *req, int max_len, char *error)
{
struct dns_hdr *hdr;
void *where;
t_packet *packet;
char buffer[BASE64_SIZE(MAX_ERROR_SIZE) + PACKET_LEN];
char buffer2[BASE64_SIZE(MAX_ERROR_SIZE) + PACKET_LEN];
int len;
hdr = req;
hdr->ra = 1;
hdr->qr = 1;
if (!(where = jump_end_query(req, GET_16(&hdr->qdcount), max_len)))
return (-1);
packet = (t_packet *) memset(buffer, 0, PACKET_LEN);
packet->type = ERR;
len = strlen(error);
memcpy(buffer+PACKET_LEN, error, len+1);
base64_encode(buffer, buffer2, PACKET_LEN + len);
where = add_reply(hdr, where, TYPE_KEY, buffer2);
return (where - req);
}
