tests: bluetooth: custom LTK feature tests

Adding bsim tests for basic custom LTK feature functions,
it's coexistence with SMP and some invalid scenarios.

Signed-off-by: Dobrynin, Artur <[email protected]>

Author: ardo-nordic

tests/bluetooth/bsim/custom_ltk/CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(bsim_test_custom_ltk)
+
+add_subdirectory(${ZEPHYR_BASE}/tests/bsim/babblekit babblekit)
+target_link_libraries(app PRIVATE babblekit)
+
+target_sources(app PRIVATE
+    src/main.c
+)
+
+zephyr_include_directories(
+  ${BSIM_COMPONENTS_PATH}/libUtilv1/src/
+  ${BSIM_COMPONENTS_PATH}/libPhyComv1/src/
+  )

tests/bluetooth/bsim/custom_ltk/prj.conf

@@ -0,0 +1,12 @@
+CONFIG_BT=y
+CONFIG_BT_PERIPHERAL=y
+CONFIG_BT_CENTRAL=y
+CONFIG_BT_TESTING=y
+CONFIG_BT_SMP=y
+
+CONFIG_BT_BONDABLE_PER_CONNECTION=y
+
+CONFIG_BT_NRF_CONN_SET_LTK=y
+
+CONFIG_ASSERT=y
+CONFIG_LOG=y