tests: net: dns: Add test for invalid DNS answer parsing (16669ec4) · Commits · Wenxi XU / zephyr

tests/net/lib/dns_packet/src/main.c

+21 −0

Original line number	Diff line number	Diff line
		@@ -1266,6 +1266,27 @@ ZTEST(dns_packet, test_dns_flags_len)
		"DNS message length check failed (%d)", ret);
		}

		static uint8_t invalid_answer_resp_ipv4[18] = {
		/* DNS msg header (12 bytes) */
		0x01, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x01, 0x00, 0x01,
		};

		ZTEST(dns_packet, test_dns_invalid_answer)
		{
		struct dns_msg_t dns_msg = { 0 };
		enum dns_rr_type type;
		uint32_t ttl;
		int ret;

		dns_msg.msg = invalid_answer_resp_ipv4;
		dns_msg.msg_size = sizeof(invalid_answer_resp_ipv4);
		dns_msg.answer_offset = 12;

		ret = dns_unpack_answer(&dns_msg, 0, &ttl, &type);
		zassert_equal(ret, -EINVAL, "DNS message answer check succeed (%d)", ret);
		}

		ZTEST_SUITE(dns_packet, NULL, NULL, NULL, NULL, NULL);
		/* TODO:
		* 1) add malformed DNS data (mostly done)