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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | /*** | |
3 | Copyright © 2018 Jonathan Rudenberg | |
4 | ***/ | |
5 | ||
6 | #include "fuzz.h" | |
7 | #include "resolved-dns-packet.h" | |
8 | ||
9 | int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { | |
10 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; | |
11 | ||
12 | if (size > DNS_PACKET_SIZE_MAX) | |
13 | return 0; | |
14 | ||
15 | assert_se(dns_packet_new(&p, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX) >= 0); | |
16 | p->size = 0; /* by default append starts after the header, undo that */ | |
17 | assert_se(dns_packet_append_blob(p, data, size, NULL) >= 0); | |
18 | if (size < DNS_PACKET_HEADER_SIZE) { | |
19 | /* make sure we pad the packet back up to the minimum header size */ | |
20 | assert_se(p->allocated >= DNS_PACKET_HEADER_SIZE); | |
21 | memzero(DNS_PACKET_DATA(p) + size, DNS_PACKET_HEADER_SIZE - size); | |
22 | p->size = DNS_PACKET_HEADER_SIZE; | |
23 | } | |
24 | (void) dns_packet_extract(p); | |
25 | ||
26 | return 0; | |
27 | } |