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tests: net: dns: Add checking of malformed packet

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Make sure we test malformed packet parsing.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
This commit is contained in:
Jukka Rissanen 2024-11-26 15:47:46 +02:00 • committed by Benjamin Cabé
commit 6f96915a14
1 changed files with 26 additions and 2 deletions
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28
tests/net/lib/dns_packet/src/main.c
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@ -709,6 +709,24 @@ static uint8_t resp_truncated_response_ipv4_5[] = {
0x00, 0x04,
};
static uint8_t resp_truncated_response_ipv4_6[] = {
/* DNS msg header (12 bytes) */
/* Id (0) */
0x00, 0x00,
/* Flags (response, rcode = 1) */
0x80, 0x01,
/* Number of questions */
0x00, 0x01,
/* Number of answers */
0x00, 0x00,
/* Number of authority RRs */
0x00, 0x00,
/* Number of additional RRs */
0x00, 0x00,
/* Rest of the data is missing */
};
static uint8_t resp_valid_response_ipv4_6[] = {
/* DNS msg header (12 bytes) */
0xb0, 0x41, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
@ -1093,8 +1111,13 @@ static void run_dns_malformed_response(const char *test_case,
dns_id = dns_unpack_header_id(dns_msg.msg);
setup_dns_context(&dns_ctx, 0, dns_id, query, sizeof(query),
DNS_QUERY_TYPE_A);
/* If the message is longer than 12 bytes, it could be a valid DNS message
* in which case setup the context for the reply.
*/
if (len > 12) {
setup_dns_context(&dns_ctx, 0, dns_id, query, sizeof(query),
DNS_QUERY_TYPE_A);
}
ret = dns_validate_msg(&dns_ctx, &dns_msg, &dns_id, &query_idx,
NULL, &query_hash);
@ -1198,6 +1221,7 @@ static void test_dns_malformed_responses(void)
RUN_MALFORMED_TEST(resp_truncated_response_ipv4_3);
RUN_MALFORMED_TEST(resp_truncated_response_ipv4_4);
RUN_MALFORMED_TEST(resp_truncated_response_ipv4_5);
RUN_MALFORMED_TEST(resp_truncated_response_ipv4_6);
}
ZTEST(dns_packet, test_dns_malformed_and_valid_responses)