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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "fuzz.h"
#include "memory-util.h"
#include "resolved-dns-packet.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
if (outside_size_range(size, 0, DNS_PACKET_SIZE_MAX))
return 0;
fuzz_setup_logging();
assert_se(dns_packet_new(&p, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX) >= 0);
p->size = 0; /* by default append starts after the header, undo that */
assert_se(dns_packet_append_blob(p, data, size, NULL) >= 0);
if (size < DNS_PACKET_HEADER_SIZE) {
/* make sure we pad the packet back up to the minimum header size */
assert_se(p->allocated >= DNS_PACKET_HEADER_SIZE);
memzero(DNS_PACKET_DATA(p) + size, DNS_PACKET_HEADER_SIZE - size);
p->size = DNS_PACKET_HEADER_SIZE;
}
(void) dns_packet_extract(p);
return 0;
}
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