_public_
int knot_pkt_copy(knot_pkt_t *dst, const knot_pkt_t *src)
{
if (dst == NULL || src == NULL) {
return KNOT_EINVAL;
}
if (dst->max_size < src->size) {
return KNOT_ESPACE;
}
dst->size = src->size;
memcpy(dst->wire, src->wire, dst->size);
/* Copy TSIG RR back to wire. */
if (src->tsig_rr) {
int ret = knot_tsig_append(dst->wire, &dst->size, dst->max_size,
src->tsig_rr);
if (ret != KNOT_EOK) {
return ret;
}
}
/* Invalidate arrays . */
dst->rr = NULL;
dst->rr_info = NULL;
dst->rrset_count = 0;
dst->rrset_allocd = 0;
/* @note This could be done more effectively if needed. */
return knot_pkt_parse(dst, 0);
}
int knot_tsig_add(uint8_t *msg, size_t *msg_len, size_t msg_max_len,
uint16_t tsig_rcode, const knot_rrset_t *tsig_rr)
{
/*! \todo Revise!! */
if (!msg || !msg_len || !tsig_rr) {
return KNOT_EINVAL;
}
/*! \todo What key to use, when we do not sign? Does this even work? */
knot_rrset_t *tmp_tsig =
knot_rrset_new(tsig_rr->owner, KNOT_RRTYPE_TSIG,
KNOT_CLASS_ANY, NULL);
if (!tmp_tsig) {
dbg_tsig("TSIG: tmp_tsig = NULL\n");
return KNOT_ENOMEM;
}
assert(tsig_rcode != KNOT_RCODE_BADTIME);
tsig_create_rdata(tmp_tsig, tsig_rdata_alg_name(tsig_rr), 0, tsig_rcode);
tsig_rdata_set_time_signed(tmp_tsig, tsig_rdata_time_signed(tsig_rr));
/* Comparing to BIND it was found out that the Fudge should always be
* set to the server's value.
*/
tsig_rdata_set_fudge(tmp_tsig, KNOT_TSIG_FUDGE_DEFAULT);
/* Set original ID */
tsig_rdata_set_orig_id(tmp_tsig, knot_wire_get_id(msg));
/* Set other len. */
tsig_rdata_set_other_data(tmp_tsig, 0, 0);
/* Append TSIG RR. */
int ret = knot_tsig_append(msg, msg_len, msg_max_len, tsig_rr);
/* key_name already referenced in RRSet, no need to free separately. */
knot_rrset_free(&tmp_tsig, NULL);
return ret;
}
