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/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "knot/nameserver/xfr.h"
#include "contrib/mempattern.h"
int xfr_process_list(knot_pkt_t *pkt, xfr_put_cb put, knotd_qdata_t *qdata)
{
if (pkt == NULL || qdata == NULL || qdata->extra->ext == NULL) {
return KNOT_EINVAL;
}
int ret = KNOT_EOK;
knot_mm_t *mm = qdata->mm;
struct xfr_proc *xfer = qdata->extra->ext;
/* Check if the zone wasn't expired during multi-message transfer. */
const zone_contents_t *contents = qdata->extra->contents;
if (contents == NULL) {
return KNOT_ENOZONE;
}
knot_rrset_t soa_rr = node_rrset(contents->apex, KNOT_RRTYPE_SOA);
/* Prepend SOA on first packet. */
if (xfer->stats.messages == 0) {
ret = knot_pkt_put(pkt, 0, &soa_rr, KNOT_PF_NOTRUNC);
if (ret != KNOT_EOK) {
return ret;
}
}
/* Process all items in the list. */
while (!EMPTY_LIST(xfer->nodes)) {
ptrnode_t *head = HEAD(xfer->nodes);
ret = put(pkt, head->d, xfer);
if (ret == KNOT_EOK) { /* Finished. */
/* Complete change set. */
rem_node((node_t *)head);
mm_free(mm, head);
} else { /* Packet full or other error. */
break;
}
}
/* Append SOA on last packet. */
if (ret == KNOT_EOK) {
ret = knot_pkt_put(pkt, 0, &soa_rr, KNOT_PF_NOTRUNC);
}
/* Update counters. */
xfr_stats_add(&xfer->stats, pkt->size + knot_rrset_size(&qdata->opt_rr));
/* If a rrset is larger than the message,
* fail to avoid infinite loop of empty messages */
if (ret == KNOT_ESPACE && pkt->rrset_count < 1) {
return KNOT_ENOXFR;
}
return ret;
}
void xfr_stats_begin(struct xfr_stats *stats)
{
assert(stats);
memset(stats, 0, sizeof(*stats));
stats->begin = time_now();
}
void xfr_stats_add(struct xfr_stats *stats, unsigned bytes)
{
assert(stats);
stats->messages += 1;
stats->bytes += bytes;
}
void xfr_stats_end(struct xfr_stats *stats)
{
assert(stats);
stats->end = time_now();
}
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