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resolved: tests for dns_packet_extract(); check handling of self-referential compression pointers

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This commit is contained in:
James Coglan 2024-06-10 14:46:55 +01:00
parent f97d7a6969
commit 326ba6a5b0
1 changed files with 24 additions and 0 deletions
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24
src/resolve/test-dns-packet-extract.c
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@ -935,6 +935,30 @@ TEST(packet_query_bad_compression_5) {
ASSERT_EQ(dns_answer_size(packet->answer), 0u);
}
TEST(packet_query_bad_compression_6) {
_cleanup_(dns_packet_unrefp) DnsPacket *packet = NULL;
ASSERT_OK(dns_packet_new(&packet, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX));
ASSERT_NOT_NULL(packet);
dns_packet_truncate(packet, 0);
const uint8_t data[] = {
0x00, 0x2a, 0x01, 0x00,
0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* name */ 0x03, 'w', 'w', 'w',
0xc0, 0x0c, /* points at the current name */
/* A */ 0x00, 0x01,
/* IN */ 0x00, 0x01
};
ASSERT_OK(dns_packet_append_blob(packet, data, sizeof(data), NULL));
ASSERT_ERROR(dns_packet_extract(packet), EBADMSG);
ASSERT_EQ(dns_question_size(packet->question), 0u);
ASSERT_EQ(dns_answer_size(packet->answer), 0u);
}
/* ================================================================
* reply: A
* ================================================================ */