/*! \brief Set EDNS section. */
static int prepare_edns(conf_t *conf, zone_t *zone, knot_pkt_t *pkt)
{
conf_val_t val = conf_zone_get(conf, C_REQUEST_EDNS_OPTION, zone->name);
/* Check if an extra EDNS option is configured. */
size_t opt_len;
const uint8_t *opt_data = conf_data(&val, &opt_len);
if (opt_data == NULL) {
return KNOT_EOK;
}
knot_rrset_t opt_rr;
conf_val_t *max_payload = &conf->cache.srv_max_udp_payload;
int ret = knot_edns_init(&opt_rr, conf_int(max_payload), 0,
KNOT_EDNS_VERSION, &pkt->mm);
if (ret != KNOT_EOK) {
return ret;
}
ret = knot_edns_add_option(&opt_rr, wire_read_u64(opt_data),
yp_bin_len(opt_data + sizeof(uint64_t)),
yp_bin(opt_data + sizeof(uint64_t)), &pkt->mm);
if (ret != KNOT_EOK) {
knot_rrset_clear(&opt_rr, &pkt->mm);
return ret;
}
knot_pkt_begin(pkt, KNOT_ADDITIONAL);
ret = knot_pkt_put(pkt, KNOT_COMPR_HINT_NONE, &opt_rr, KNOT_PF_FREE);
if (ret != KNOT_EOK) {
knot_rrset_clear(&opt_rr, &pkt->mm);
return ret;
}
return KNOT_EOK;
}
/*! \brief Free all RRSets and reset RRSet count. */
static void pkt_free_data(knot_pkt_t *pkt)
{
assert(pkt);
/* Free RRSets if applicable. */
for (uint16_t i = 0; i < pkt->rrset_count; ++i) {
if (pkt->rr_info[i].flags & KNOT_PF_FREE) {
knot_rrset_clear(&pkt->rr[i], &pkt->mm);
}
}
/* Reset RR count. */
pkt->rrset_count = 0;
/* Reset special types. */
pkt->opt_rr = NULL;
pkt->tsig_rr = NULL;
}
static int answer_query(knot_pkt_t *pkt, pack_t *addr_set, struct kr_query *qry)
{
uint16_t rrtype = qry->stype;
uint16_t rrclass = qry->sclass;
if (rrtype != KNOT_RRTYPE_A && rrtype != KNOT_RRTYPE_AAAA) {
return kr_error(ENOENT);
}
knot_dname_t *qname = knot_dname_copy(qry->sname, &pkt->mm);
knot_rrset_t rr;
knot_rrset_init(&rr, qname, rrtype, rrclass);
int family_len = sizeof(struct in_addr);
if (rr.type == KNOT_RRTYPE_AAAA) {
family_len = sizeof(struct in6_addr);
}
/* Append address records from hints */
uint8_t *addr = pack_head(*addr_set);
while (addr != pack_tail(*addr_set)) {
size_t len = pack_obj_len(addr);
void *addr_val = pack_obj_val(addr);
if (len == family_len) {
knot_rrset_add_rdata(&rr, addr_val, len, 0, &pkt->mm);
}
addr = pack_obj_next(addr);
}
int ret = kr_error(ENOENT);
if (!knot_rrset_empty(&rr)) {
/* Update packet question */
if (!knot_dname_is_equal(knot_pkt_qname(pkt), qname)) {
KR_PKT_RECYCLE(pkt);
knot_pkt_put_question(pkt, qname, rrclass, rrtype);
}
/* Append to packet */
ret = knot_pkt_put(pkt, KNOT_COMPR_HINT_QNAME, &rr, KNOT_PF_FREE);
}
/* Clear RR if failed */
if (ret != 0) {
knot_rrset_clear(&rr, &pkt->mm);
}
return ret;
}
int main(int argc, char *argv[])
{
plan(TEST_COUNT);
int done = 0;
knot_rrset_t opt_rr;
int ret = knot_edns_init(&opt_rr, E_MAX_PLD, E_RCODE, E_VERSION, NULL);
ok(ret == KNOT_EOK, "OPT RR: init");
done++;
/* Check initialized values (no NSID yet). */
bool success = check_header(&opt_rr, E_MAX_PLD, E_VERSION, 0, E_RCODE,
"OPT RR: check header", &done);
if (!success) {
skip_block(remaining(done), "OPT RR not initialized properly");
goto exit;
}
/* Setters */
success = test_setters(&opt_rr, &done);
if (!success) {
skip_block(remaining(done), "OPT RR: setters error");
goto exit;
}
/* Getters
Note: NULL parameters are not supported, so no test for that. */
success = test_getters(&opt_rr, &done);
if (!success) {
skip_block(remaining(done), "OPT RR: getters error");
goto exit;
}
/* EDNS client subnet */
test_client_subnet();
exit:
knot_rrset_clear(&opt_rr, NULL);
return 0;
}
int main(int argc, char *argv[])
{
plan(25);
/* Create memory pool context. */
int ret = 0;
knot_mm_t mm;
mm_ctx_mempool(&mm, MM_DEFAULT_BLKSIZE);
/* Create names and data. */
knot_dname_t* dnames[NAMECOUNT] = {0};
knot_rrset_t* rrsets[NAMECOUNT] = {0};
for (unsigned i = 0; i < NAMECOUNT; ++i) {
dnames[i] = knot_dname_from_str_alloc(g_names[i]);
}
uint8_t *edns_str = (uint8_t *)"ab";
/* Create OPT RR. */
knot_rrset_t opt_rr;
ret = knot_edns_init(&opt_rr, 1024, 0, 0, &mm);
if (ret != KNOT_EOK) {
skip_block(25, "Failed to initialize OPT RR.");
return 0;
}
/* Add NSID */
ret = knot_edns_add_option(&opt_rr, KNOT_EDNS_OPTION_NSID,
strlen((char *)edns_str), edns_str, &mm);
if (ret != KNOT_EOK) {
knot_rrset_clear(&opt_rr, &mm);
skip_block(25, "Failed to add NSID to OPT RR.");
return 0;
}
/*
* Packet writer tests.
*/
/* Create packet. */
knot_pkt_t *out = knot_pkt_new(NULL, MM_DEFAULT_BLKSIZE, &mm);
ok(out != NULL, "pkt: new");
/* Mark as response (not part of the test). */
knot_wire_set_qr(out->wire);
/* Secure packet. */
const char *tsig_secret = "abcd";
knot_tsig_key_t tsig_key;
tsig_key.algorithm = DNSSEC_TSIG_HMAC_MD5;
tsig_key.name = dnames[0];
tsig_key.secret.data = (uint8_t *)strdup(tsig_secret);
tsig_key.secret.size = strlen(tsig_secret);
ret = knot_pkt_reserve(out, knot_tsig_wire_maxsize(&tsig_key));
ok(ret == KNOT_EOK, "pkt: set TSIG key");
/* Write question. */
ret = knot_pkt_put_question(out, dnames[0], KNOT_CLASS_IN, KNOT_RRTYPE_A);
ok(ret == KNOT_EOK, "pkt: put question");
/* Add OPT to packet (empty NSID). */
ret = knot_pkt_reserve(out, knot_edns_wire_size(&opt_rr));
ok(ret == KNOT_EOK, "pkt: reserve OPT RR");
/* Begin ANSWER section. */
ret = knot_pkt_begin(out, KNOT_ANSWER);
ok(ret == KNOT_EOK, "pkt: begin ANSWER");
/* Write ANSWER section. */
rrsets[0] = knot_rrset_new(dnames[0], KNOT_RRTYPE_A, KNOT_CLASS_IN, NULL);
knot_dname_free(&dnames[0], NULL);
knot_rrset_add_rdata(rrsets[0], RDVAL(0), RDLEN(0), TTL, NULL);
ret = knot_pkt_put(out, KNOT_COMPR_HINT_QNAME, rrsets[0], 0);
ok(ret == KNOT_EOK, "pkt: write ANSWER");
/* Begin AUTHORITY. */
ret = knot_pkt_begin(out, KNOT_AUTHORITY);
ok(ret == KNOT_EOK, "pkt: begin AUTHORITY");
/* Write rest to AUTHORITY. */
ret = KNOT_EOK;
for (unsigned i = 1; i < NAMECOUNT; ++i) {
rrsets[i] = knot_rrset_new(dnames[i], KNOT_RRTYPE_NS, KNOT_CLASS_IN, NULL);
knot_dname_free(&dnames[i], NULL);
knot_rrset_add_rdata(rrsets[i], RDVAL(i), RDLEN(i), TTL, NULL);
ret |= knot_pkt_put(out, KNOT_COMPR_HINT_NONE, rrsets[i], 0);
}
ok(ret == KNOT_EOK, "pkt: write AUTHORITY(%u)", NAMECOUNT - 1);
/* Begin ADDITIONALS */
ret = knot_pkt_begin(out, KNOT_ADDITIONAL);
ok(ret == KNOT_EOK, "pkt: begin ADDITIONALS");
/* Encode OPT RR. */
ret = knot_pkt_put(out, KNOT_COMPR_HINT_NONE, &opt_rr, 0);
ok(ret == KNOT_EOK, "pkt: write OPT RR");
/*
* Packet reader tests.
*/
/* Create new packet from query packet. */
knot_pkt_t *in = knot_pkt_new(out->wire, out->size, &out->mm);
ok(in != NULL, "pkt: create packet for parsing");
/* Read packet header. */
ret = knot_pkt_parse_question(in);
ok(ret == KNOT_EOK, "pkt: read header");
/* Read packet payload. */
ret = knot_pkt_parse_payload(in, 0);
ok(ret == KNOT_EOK, "pkt: read payload");
/* Compare parsed packet to written packet. */
packet_match(in, out);
/*
* Copied packet tests.
*/
knot_pkt_t *copy = knot_pkt_new(NULL, in->max_size, &in->mm);
ret = knot_pkt_copy(copy, in);
ok(ret == KNOT_EOK, "pkt: create packet copy");
/* Compare copied packet to original. */
packet_match(in, copy);
/* Free packets. */
knot_pkt_free(©);
knot_pkt_free(&out);
knot_pkt_free(&in);
ok(in == NULL && out == NULL && copy == NULL, "pkt: free");
/* Free extra data. */
for (unsigned i = 0; i < NAMECOUNT; ++i) {
knot_rrset_free(&rrsets[i], NULL);
}
free(tsig_key.secret.data);
mp_delete((struct mempool *)mm.ctx);
return 0;
}
