6 files changed, 569 insertions, 0 deletions
diff --git a/tests/unittests/CMakeLists.txt b/tests/unittests/CMakeLists.txt
new file mode 100644
index 0000000..29151dd
--- /dev/null
+++ b/tests/unittests/CMakeLists.txt
@@ -0,0 +1,7 @@
+
+
+add_rtr_unit_test(test_packets_static test_packets_static.c rtrlib_static cmocka)
+wrap_functions(test_packets_static lrtr_get_monotonic_time tr_send_all)
+
+add_rtr_unit_test(test_packets test_packets.c rtrlib_static cmocka)
+wrap_functions(test_packets rtr_change_socket_state tr_send_all)
diff --git a/tests/unittests/rtrlib_unittests.h b/tests/unittests/rtrlib_unittests.h
new file mode 100644
index 0000000..4ea2866
--- /dev/null
+++ b/tests/unittests/rtrlib_unittests.h
@@ -0,0 +1,18 @@
+/*
+ * This file is part of RTRlib.
+ *
+ * This file is subject to the terms and conditions of the MIT license.
+ * See the file LICENSE in the top level directory for more details.
+ *
+ * Website; http://rtrlib.realmv6.org/
+ */
+
+// clang-format off
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <cmocka.h>
+// clang-format on
+
+#define UNUSED(x) (void)(x)
diff --git a/tests/unittests/test_packets.c b/tests/unittests/test_packets.c
new file mode 100644
index 0000000..be2e570
--- /dev/null
+++ b/tests/unittests/test_packets.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of RTRlib.
+ *
+ * This file is subject to the terms and conditions of the MIT license.
+ * See the file LICENSE in the top level directory for more details.
+ *
+ * Website: http://rtrlib.realmv6.org/
+ */
+
+#include "rtrlib_unittests.h"
+#include "test_packets.h"
+
+#include "rtrlib/rtr/packets_private.h"
+
+int __wrap_tr_send_all(const struct tr_socket *socket, const void *pdu, const size_t len, const time_t timeout)
+{
+	UNUSED(socket);
+	UNUSED(pdu);
+	UNUSED(len);
+	UNUSED(timeout);
+	return (int)mock();
+}
+
+void __wrap_rtr_change_socket_state(struct rtr_socket *rtr_socket, const enum rtr_socket_state new_state)
+{
+	UNUSED(rtr_socket);
+	UNUSED(new_state);
+}
+
+static void test_rtr_send_reset_query(void **state)
+{
+	struct rtr_socket socket;
+
+	UNUSED(state);
+
+	socket.connection_state_fp = NULL;
+
+	will_return(__wrap_tr_send_all, 0);
+	assert_int_equal(rtr_send_reset_query(&socket), RTR_ERROR);
+
+	will_return(__wrap_tr_send_all, 10);
+	assert_int_equal(rtr_send_reset_query(&socket), RTR_SUCCESS);
+}
+
+static void test_rtr_change_socket_state(void **state)
+{
+	struct rtr_socket socket;
+
+	UNUSED(state);
+
+	socket.connection_state_fp = NULL;
+	socket.state = RTR_RESET;
+
+	__real_rtr_change_socket_state(&socket, RTR_SYNC);
+	assert_int_equal(socket.state, RTR_SYNC);
+
+	__real_rtr_change_socket_state(&socket, RTR_SYNC);
+	assert_int_equal(socket.state, RTR_SYNC);
+
+	__real_rtr_change_socket_state(&socket, RTR_SHUTDOWN);
+	assert_int_equal(socket.state, RTR_SHUTDOWN);
+
+	__real_rtr_change_socket_state(&socket, RTR_ESTABLISHED);
+	assert_int_equal(socket.state, RTR_SHUTDOWN);
+}
+
+int main(void)
+{
+	const struct CMUnitTest tests[] = {cmocka_unit_test(test_rtr_send_reset_query),
+					   cmocka_unit_test(test_rtr_change_socket_state)};
+	return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/unittests/test_packets.h b/tests/unittests/test_packets.h
new file mode 100644
index 0000000..2fe7f9c
--- /dev/null
+++ b/tests/unittests/test_packets.h
@@ -0,0 +1,14 @@
+/*
+ * This file is part of RTRlib.
+ *
+ * This file is subject to the terms and conditions of the MIT license.
+ * See the file LICENSE in the top level directory for more details.
+ *
+ * Website; http://rtrlib.realmv6.org/
+ */
+
+#include "rtrlib/rtr/rtr.h"
+
+void __real_rtr_change_socket_state(struct rtr_socket *rtr_socket, const enum rtr_socket_state new_state);
+int __wrap_tr_send_all(const struct tr_socket *socket, const void *pdu, const size_t len, const time_t timeout);
+void __wrap_rtr_change_socket_state(struct rtr_socket *rtr_socket, const enum rtr_socket_state new_state);
diff --git a/tests/unittests/test_packets_static.c b/tests/unittests/test_packets_static.c
new file mode 100644
index 0000000..b8589d7
--- /dev/null
+++ b/tests/unittests/test_packets_static.c
@@ -0,0 +1,444 @@
+/*
+ * This file is part of RTRlib.
+ *
+ * This file is subject to the terms and conditions of the MIT license.
+ * See the file LICENSE in the top level directory for more details.
+ *
+ * Website; http://rtrlib.realmv6.org/
+ */
+
+#include "rtrlib_unittests.h"
+#include "test_packets_static.h"
+
+#include "rtrlib/lib/alloc_utils_private.h"
+#include "rtrlib/rtr/packets.c"
+#include "rtrlib/rtr_mgr_private.h"
+
+int __wrap_lrtr_get_monotonic_time(time_t *seconds)
+{
+	UNUSED(seconds);
+	return mock_type(int);
+}
+
+int __wrap_tr_send_all(const struct tr_socket *socket, const void *pdu, const size_t len, const time_t timeout)
+{
+	check_expected(socket);
+	check_expected(pdu);
+	check_expected(len);
+	check_expected(timeout);
+	return (int)mock();
+}
+
+static int cmp_serial_in_error_pdu(const LargestIntegralType test, const LargestIntegralType reference)
+{
+	struct pdu_error *test_pdu = (struct pdu_error *)test;
+	struct pdu_serial_query *reference_pdu = (struct pdu_serial_query *)reference;
+	struct pdu_serial_query *encapsulated_pdu = (struct pdu_serial_query *)test_pdu->rest;
+
+	if (encapsulated_pdu->ver != reference_pdu->ver || encapsulated_pdu->type != reference_pdu->type ||
+	    encapsulated_pdu->session_id != reference_pdu->session_id || encapsulated_pdu->len != reference_pdu->len ||
+	    encapsulated_pdu->sn != reference_pdu->sn) {
+		return 0;
+	}
+
+	return 1;
+}
+
+static int cmp_header_in_error_pdu(const LargestIntegralType test, const LargestIntegralType reference)
+{
+	struct pdu_error *test_pdu = (struct pdu_error *)test;
+	struct pdu_serial_query *reference_pdu = (struct pdu_serial_query *)reference;
+	struct pdu_serial_query *encapsulated_pdu = (struct pdu_serial_query *)test_pdu->rest;
+
+	if (encapsulated_pdu->ver != reference_pdu->ver || encapsulated_pdu->type != reference_pdu->type ||
+	    encapsulated_pdu->session_id != reference_pdu->session_id || encapsulated_pdu->len != reference_pdu->len) {
+		return 0;
+	}
+
+	return 1;
+}
+
+static void test_set_last_update(void **state)
+{
+	struct rtr_socket socket;
+
+	UNUSED(state);
+
+	socket.connection_state_fp = NULL;
+
+	will_return(__wrap_lrtr_get_monotonic_time, RTR_ERROR);
+	assert_int_equal(rtr_set_last_update(&socket), RTR_ERROR);
+
+	will_return(__wrap_lrtr_get_monotonic_time, RTR_SUCCESS);
+	assert_int_equal(rtr_set_last_update(&socket), RTR_SUCCESS);
+}
+
+static void test_rtr_get_pdu_type(void **state)
+{
+	struct pdu_header pdu;
+
+	UNUSED(state);
+
+	pdu.type = SERIAL_NOTIFY;
+	assert_int_equal(rtr_get_pdu_type(&pdu), SERIAL_NOTIFY);
+
+	pdu.type = SERIAL_QUERY;
+	assert_int_equal(rtr_get_pdu_type(&pdu), SERIAL_QUERY);
+
+	pdu.type = RESET_QUERY;
+	assert_int_equal(rtr_get_pdu_type(&pdu), RESET_QUERY);
+
+	pdu.type = CACHE_RESPONSE;
+	assert_int_equal(rtr_get_pdu_type(&pdu), CACHE_RESPONSE);
+
+	pdu.type = RESERVED;
+	assert_int_equal(rtr_get_pdu_type(&pdu), RESERVED);
+
+	pdu.type = IPV6_PREFIX;
+	assert_int_equal(rtr_get_pdu_type(&pdu), IPV6_PREFIX);
+
+	pdu.type = EOD;
+	assert_int_equal(rtr_get_pdu_type(&pdu), EOD);
+
+	pdu.type = CACHE_RESET;
+	assert_int_equal(rtr_get_pdu_type(&pdu), CACHE_RESET);
+
+	pdu.type = ROUTER_KEY;
+	assert_int_equal(rtr_get_pdu_type(&pdu), ROUTER_KEY);
+
+	pdu.type = ERROR;
+	assert_int_equal(rtr_get_pdu_type(&pdu), ERROR);
+}
+
+static void test_pdu_to_network_byte_order(void **state)
+{
+	struct pdu_serial_query pdu;
+
+	UNUSED(state);
+
+	pdu.ver = 0;
+	pdu.type = SERIAL_QUERY;
+	pdu.session_id = 0x32A5;
+	pdu.len = 0xC;
+	pdu.sn = 0xCC56E9BB;
+
+	rtr_pdu_to_network_byte_order(&pdu);
+
+	assert_int_equal(pdu.ver, 0);
+	assert_int_equal(pdu.type, SERIAL_QUERY);
+	assert_int_equal(pdu.session_id, 0xA532);
+	assert_int_equal(pdu.len, 0x0C000000);
+	assert_int_equal(pdu.sn, 0xBBE956CC);
+}
+
+static void test_pdu_to_host_byte_order(void **state)
+{
+	struct pdu_serial_notify pdu_serial;
+	struct pdu_end_of_data_v1 pdu_eod;
+
+	UNUSED(state);
+
+	pdu_serial.ver = 1;
+	pdu_serial.type = SERIAL_NOTIFY;
+	pdu_serial.session_id = 0xDDFF;
+	pdu_serial.len = 0xC;
+	pdu_serial.sn = 0xDF;
+
+	rtr_pdu_footer_to_host_byte_order(&pdu_serial);
+	rtr_pdu_header_to_host_byte_order(&pdu_serial);
+
+	assert_int_equal(pdu_serial.ver, 1);
+	assert_int_equal(pdu_serial.type, SERIAL_NOTIFY);
+	assert_int_equal(pdu_serial.len, 0xC000000);
+	assert_int_equal(pdu_serial.sn, 0xDF000000);
+
+	pdu_eod.ver = 1;
+	pdu_eod.type = EOD;
+	pdu_eod.session_id = 0xFDDF;
+	pdu_eod.len = 0x18;
+	pdu_eod.sn = 0xFEDCBA;
+	pdu_eod.refresh_interval = 0xAF;
+	pdu_eod.retry_interval = 0xDC;
+	pdu_eod.expire_interval = 0xCCF;
+
+	rtr_pdu_header_to_host_byte_order(&pdu_eod);
+	rtr_pdu_footer_to_host_byte_order(&pdu_eod);
+
+	assert_int_equal(pdu_eod.ver, 1);
+	assert_int_equal(pdu_eod.type, EOD);
+	assert_int_equal(pdu_eod.session_id, 0xDFFD);
+	assert_int_equal(pdu_eod.len, 0x18000000);
+	assert_int_equal(pdu_eod.sn, 0xBADCFE00);
+	assert_int_equal(pdu_eod.refresh_interval, 0xAF000000);
+	assert_int_equal(pdu_eod.retry_interval, 0xDC000000);
+	assert_int_equal(pdu_eod.expire_interval, 0xCF0C0000);
+}
+
+static void test_rtr_pdu_check_size(void **state)
+{
+	struct pdu_header pdu;
+	struct pdu_error *error = malloc(30);
+
+	UNUSED(state);
+
+	memset(error, 0, 30);
+
+	pdu.type = SERIAL_NOTIFY;
+	pdu.len = 20;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 12;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = CACHE_RESPONSE;
+	pdu.len = 5;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 8;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = IPV4_PREFIX;
+	pdu.len = 25;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 20;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = IPV6_PREFIX;
+	pdu.len = 15;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 32;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = CACHE_RESET;
+	pdu.len = 10;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 8;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = SERIAL_QUERY;
+	pdu.len = 14;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 12;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = RESET_QUERY;
+	pdu.len = 10;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 8;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = RESERVED;
+	pdu.len = 0;
+	assert_false(rtr_pdu_check_size(&pdu));
+
+	pdu.type = EOD;
+	pdu.ver = RTR_PROTOCOL_VERSION_1;
+	pdu.len = 12;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 24;
+	assert_true(rtr_pdu_check_size(&pdu));
+	pdu.ver = RTR_PROTOCOL_VERSION_0;
+	pdu.len = 18;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 12;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	pdu.type = ROUTER_KEY;
+	pdu.len = 124;
+	assert_false(rtr_pdu_check_size(&pdu));
+	pdu.len = 123;
+	assert_true(rtr_pdu_check_size(&pdu));
+
+	/* Test error pdu size checks */
+	error->type = ERROR;
+	error->len = 14;
+	error->len_enc_pdu = 0;
+	assert_false(rtr_pdu_check_size((struct pdu_header *)error));
+	error->len = 20;
+	error->len_enc_pdu = 0x8000000;
+	assert_false(rtr_pdu_check_size((struct pdu_header *)error));
+	error->len = 24;
+	error->rest[11] = 0xA;
+	assert_false(rtr_pdu_check_size((struct pdu_header *)error));
+}
+
+static void test_rtr_send_error_pdu(void **state)
+{
+	struct pdu_serial_query pdu_serial, pdu_serial_network;
+	struct rtr_socket socket;
+	int ret;
+
+	UNUSED(state);
+
+	pdu_serial.ver = 1;
+	pdu_serial.type = SERIAL_NOTIFY;
+	pdu_serial.session_id = 0xDDFF;
+	pdu_serial.len = sizeof(struct pdu_serial_query);
+	pdu_serial.sn = 0xDF;
+
+	memcpy(&pdu_serial_network, &pdu_serial, sizeof(struct pdu_serial_query));
+	rtr_pdu_to_network_byte_order(&pdu_serial_network);
+
+	expect_any_count(__wrap_tr_send_all, socket, 1);
+	expect_any_count(__wrap_tr_send_all, len, 1);
+	expect_any_count(__wrap_tr_send_all, timeout, 1);
+	expect_check(__wrap_tr_send_all, pdu, cmp_serial_in_error_pdu, &pdu_serial_network);
+	will_return(__wrap_tr_send_all, sizeof(pdu_serial) + sizeof(struct pdu_error));
+
+	ret = rtr_send_error_pdu_from_host(&socket, &pdu_serial, pdu_serial.len, INTERNAL_ERROR, NULL, 0);
+	assert_int_equal(ret, RTR_SUCCESS);
+
+	expect_any_count(__wrap_tr_send_all, socket, 1);
+	expect_any_count(__wrap_tr_send_all, len, 1);
+	expect_any_count(__wrap_tr_send_all, timeout, 1);
+	expect_check(__wrap_tr_send_all, pdu, cmp_serial_in_error_pdu, &pdu_serial_network);
+	will_return(__wrap_tr_send_all, sizeof(pdu_serial_network) + sizeof(struct pdu_error));
+
+	ret = rtr_send_error_pdu_from_network(&socket, &pdu_serial_network, pdu_serial.len, INTERNAL_ERROR, NULL, 0);
+	assert_int_equal(ret, RTR_SUCCESS);
+
+	expect_any_count(__wrap_tr_send_all, socket, 1);
+	expect_any_count(__wrap_tr_send_all, len, 1);
+	expect_any_count(__wrap_tr_send_all, timeout, 1);
+	expect_check(__wrap_tr_send_all, pdu, cmp_header_in_error_pdu, &pdu_serial_network);
+	will_return(__wrap_tr_send_all, sizeof(pdu_serial) + sizeof(struct pdu_error));
+
+	ret = rtr_send_error_pdu_from_host(&socket, &pdu_serial, sizeof(struct pdu_header), INTERNAL_ERROR, NULL, 0);
+	assert_int_equal(ret, RTR_SUCCESS);
+
+	ret = rtr_send_error_pdu_from_host(&socket, &pdu_serial, 2, INTERNAL_ERROR, NULL, 0);
+	assert_int_equal(ret, RTR_ERROR);
+}
+
+static void test_rtr_pdu_check_interval(void **state)
+{
+	UNUSED(state);
+
+	struct rtr_socket rtr_socket;
+	struct pdu_end_of_data_v1 pdu_eod;
+
+	int retval;
+
+	rtr_socket.refresh_interval = 0;
+	rtr_socket.retry_interval = 0;
+	rtr_socket.expire_interval = 0;
+
+	pdu_eod.refresh_interval = 1;
+	pdu_eod.retry_interval = 2;
+	pdu_eod.expire_interval = 601;
+
+	/* test appliance of interval values to the rtr_socket */
+	apply_interval_value(&rtr_socket, pdu_eod.refresh_interval, RTR_INTERVAL_TYPE_REFRESH);
+	assert_int_equal(rtr_socket.refresh_interval, pdu_eod.refresh_interval);
+
+	apply_interval_value(&rtr_socket, pdu_eod.retry_interval, RTR_INTERVAL_TYPE_RETRY);
+	assert_int_equal(rtr_socket.retry_interval, pdu_eod.retry_interval);
+
+	apply_interval_value(&rtr_socket, pdu_eod.expire_interval, RTR_INTERVAL_TYPE_EXPIRATION);
+	assert_int_equal(rtr_socket.expire_interval, pdu_eod.expire_interval);
+
+	/* test checks that determine if value is inside range */
+	retval = rtr_check_interval_range(pdu_eod.refresh_interval, RTR_REFRESH_MIN, RTR_REFRESH_MAX);
+	assert_int_equal(retval, RTR_INSIDE_INTERVAL_RANGE);
+
+	retval = rtr_check_interval_range(pdu_eod.retry_interval, RTR_RETRY_MIN, RTR_RETRY_MAX);
+	assert_int_equal(retval, RTR_INSIDE_INTERVAL_RANGE);
+
+	retval = rtr_check_interval_range(pdu_eod.expire_interval, RTR_EXPIRATION_MIN, RTR_EXPIRATION_MAX);
+	assert_int_equal(retval, RTR_INSIDE_INTERVAL_RANGE);
+
+	/* test checks that determine if value is below range */
+	pdu_eod.refresh_interval = RTR_REFRESH_MIN - 1;
+	pdu_eod.retry_interval = RTR_RETRY_MIN - 1;
+	pdu_eod.expire_interval = RTR_EXPIRATION_MIN - 1;
+
+	retval = rtr_check_interval_range(pdu_eod.refresh_interval, RTR_REFRESH_MIN, RTR_REFRESH_MAX);
+	assert_int_equal(retval, RTR_BELOW_INTERVAL_RANGE);
+
+	retval = rtr_check_interval_range(pdu_eod.retry_interval, RTR_RETRY_MIN, RTR_RETRY_MAX);
+	assert_int_equal(retval, RTR_BELOW_INTERVAL_RANGE);
+
+	retval = rtr_check_interval_range(pdu_eod.expire_interval, RTR_EXPIRATION_MIN, RTR_EXPIRATION_MAX);
+	assert_int_equal(retval, RTR_BELOW_INTERVAL_RANGE);
+
+	/* test checks that determine if value is above range */
+	pdu_eod.refresh_interval = RTR_REFRESH_MAX + 1;
+	pdu_eod.retry_interval = RTR_RETRY_MAX + 1;
+	pdu_eod.expire_interval = RTR_EXPIRATION_MAX + 1;
+
+	retval = rtr_check_interval_range(pdu_eod.refresh_interval, RTR_REFRESH_MIN, RTR_REFRESH_MAX);
+	assert_int_equal(retval, RTR_ABOVE_INTERVAL_RANGE);
+
+	retval = rtr_check_interval_range(pdu_eod.retry_interval, RTR_RETRY_MIN, RTR_RETRY_MAX);
+	assert_int_equal(retval, RTR_ABOVE_INTERVAL_RANGE);
+
+	retval = rtr_check_interval_range(pdu_eod.expire_interval, RTR_EXPIRATION_MIN, RTR_EXPIRATION_MAX);
+	assert_int_equal(retval, RTR_ABOVE_INTERVAL_RANGE);
+
+	/* test the different interval options the user can choose */
+	rtr_socket.refresh_interval = 0;
+	pdu_eod.refresh_interval = 42;
+	retval = rtr_check_interval_option(&rtr_socket, RTR_INTERVAL_MODE_ACCEPT_ANY, pdu_eod.refresh_interval,
+					   RTR_INTERVAL_TYPE_REFRESH);
+	assert_int_equal(retval, RTR_SUCCESS);
+	assert_int_equal(rtr_socket.refresh_interval, pdu_eod.refresh_interval);
+
+	rtr_socket.refresh_interval = 0;
+	pdu_eod.refresh_interval = RTR_REFRESH_MAX + 1;
+	retval = rtr_check_interval_option(&rtr_socket, RTR_INTERVAL_MODE_DEFAULT_MIN_MAX, pdu_eod.refresh_interval,
+					   RTR_INTERVAL_TYPE_REFRESH);
+	assert_int_equal(retval, RTR_SUCCESS);
+	assert_int_equal(rtr_socket.refresh_interval, RTR_REFRESH_MAX);
+
+	rtr_socket.refresh_interval = 0;
+	pdu_eod.refresh_interval = RTR_REFRESH_MIN - 1;
+	retval = rtr_check_interval_option(&rtr_socket, RTR_INTERVAL_MODE_DEFAULT_MIN_MAX, pdu_eod.refresh_interval,
+					   RTR_INTERVAL_TYPE_REFRESH);
+	assert_int_equal(retval, RTR_SUCCESS);
+	assert_int_equal(rtr_socket.refresh_interval, RTR_REFRESH_MIN);
+
+	rtr_socket.refresh_interval = 42;
+	pdu_eod.refresh_interval = RTR_REFRESH_MIN - 1;
+	retval = rtr_check_interval_option(&rtr_socket, RTR_INTERVAL_MODE_IGNORE_ON_FAILURE, pdu_eod.refresh_interval,
+					   RTR_INTERVAL_TYPE_REFRESH);
+	assert_int_equal(retval, RTR_SUCCESS);
+	assert_int_equal(rtr_socket.refresh_interval, 42);
+
+	rtr_socket.refresh_interval = 0;
+	pdu_eod.refresh_interval = RTR_REFRESH_MAX + 1;
+	retval = rtr_check_interval_option(&rtr_socket, RTR_INTERVAL_MODE_ACCEPT_ANY, pdu_eod.refresh_interval,
+					   RTR_INTERVAL_TYPE_REFRESH);
+	assert_int_equal(retval, RTR_SUCCESS);
+	assert_int_equal(rtr_socket.refresh_interval, RTR_REFRESH_MAX + 1);
+}
+
+static void test_set_interval_option(void **state)
+{
+	UNUSED(state);
+
+	struct rtr_socket rtr_socket;
+
+	rtr_set_interval_mode(&rtr_socket, RTR_INTERVAL_MODE_IGNORE_ANY);
+	assert_int_equal(rtr_get_interval_mode(&rtr_socket), RTR_INTERVAL_MODE_IGNORE_ANY);
+
+	rtr_set_interval_mode(&rtr_socket, RTR_INTERVAL_MODE_ACCEPT_ANY);
+	assert_int_equal(rtr_get_interval_mode(&rtr_socket), RTR_INTERVAL_MODE_ACCEPT_ANY);
+
+	rtr_set_interval_mode(&rtr_socket, RTR_INTERVAL_MODE_DEFAULT_MIN_MAX);
+	assert_int_equal(rtr_get_interval_mode(&rtr_socket), RTR_INTERVAL_MODE_DEFAULT_MIN_MAX);
+
+	rtr_set_interval_mode(&rtr_socket, RTR_INTERVAL_MODE_IGNORE_ON_FAILURE);
+	assert_int_equal(rtr_get_interval_mode(&rtr_socket), RTR_INTERVAL_MODE_IGNORE_ON_FAILURE);
+
+	rtr_set_interval_mode(&rtr_socket, 4);
+	assert(rtr_get_interval_mode(&rtr_socket) != 4);
+}
+
+int main(void)
+{
+	const struct CMUnitTest tests[] = {
+		cmocka_unit_test(test_set_last_update),		  cmocka_unit_test(test_rtr_get_pdu_type),
+		cmocka_unit_test(test_pdu_to_network_byte_order), cmocka_unit_test(test_pdu_to_host_byte_order),
+		cmocka_unit_test(test_rtr_pdu_check_size),	cmocka_unit_test(test_rtr_send_error_pdu),
+		cmocka_unit_test(test_rtr_pdu_check_interval),    cmocka_unit_test(test_set_interval_option),
+	};
+	return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/tests/unittests/test_packets_static.h b/tests/unittests/test_packets_static.h
new file mode 100644
index 0000000..58704ba
--- /dev/null
+++ b/tests/unittests/test_packets_static.h
@@ -0,0 +1,14 @@
+/*
+ * This file is part of RTRlib.
+ *
+ * This file is subject to the terms and conditions of the MIT license.
+ * See the file LICENSE in the top level directory for more details.
+ *
+ * Website; http://rtrlib.realmv6.org/
+ */
+
+#include "rtrlib/transport/transport_private.h"
+
+int __wrap_lrtr_get_monotonic_time(time_t *seconds);
+
+int __wrap_tr_send_all(const struct tr_socket *socket, const void *pdu, const size_t len, const time_t timeout);