From cc36fc6676e8f047b76e1a6a27cb41d8ce8dcddb Mon Sep 17 00:00:00 2001
From: erki <skull132@skullnet.me>
Date: Sun, 11 Jun 2023 16:12:45 +0300
Subject: [PATCH] Project configuration items.

---
 main/Kconfig.projbuild  | 23 +++++++++++++++++++++++
 main/app_networking.cpp | 13 +++++++++++--
 2 files changed, 34 insertions(+), 2 deletions(-)
 create mode 100644 main/Kconfig.projbuild

diff --git a/main/Kconfig.projbuild b/main/Kconfig.projbuild
new file mode 100644
index 0000000..34f9584
--- /dev/null
+++ b/main/Kconfig.projbuild
@@ -0,0 +1,23 @@
+menu "EspTunnel Configuration"
+
+    config ESPTNL_PMK
+        string "ESPNOW primary master key"
+        default "pmk1234567890123"
+        help
+            ESPNOW primary master key. Must be 16 bytes.
+
+    config ESPTNL_LMK
+        string "ESPNOW local master key"
+        default "lmk1234567890123"
+        help
+            ESPNOW local master key. Must be 16 bytes.
+
+
+    config ESPTNL_CHANNEL
+        int "Channel"
+        default 1
+        range 0 14
+        help
+            The channel for sending and receiving ESPNOW data.
+
+endmenu
\ No newline at end of file
diff --git a/main/app_networking.cpp b/main/app_networking.cpp
index 14ad246..3efe0cf 100644
--- a/main/app_networking.cpp
+++ b/main/app_networking.cpp
@@ -21,6 +21,15 @@ static const char* TAG = "Networking";
 static_assert(std::is_standard_layout_v<EspNowEvent> && std::is_trivial_v<EspNowEvent>,
         "EspNowEvent is not compatible with a FreeRTOS queue.");
 
+template<std::size_t N>
+constexpr auto STR_LEN(const char (&s)[N])
+{
+  return N;
+}
+
+static_assert(STR_LEN(CONFIG_ESPTNL_PMK) == 16 + 1, "CONFIG_ESPTNL_PMK must be of length 16 bytes + 1 null terminator.");
+static_assert(STR_LEN(CONFIG_ESPTNL_LMK) == 16 + 1, "CONFIG_ESPTNL_LMK must be of length 16 bytes + 1 null terminator.");
+
 QueueHandle_t s_esp_now_queue = nullptr;
 std::array<std::uint8_t, 128> s_rx_buffer;
 std::variant<MacAddress, std::monostate> s_peer;
@@ -72,7 +81,7 @@ void setupWifi()
   ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
   ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
   ESP_ERROR_CHECK(esp_wifi_start());
-  ESP_ERROR_CHECK(esp_wifi_set_channel(1, WIFI_SECOND_CHAN_NONE));
+  ESP_ERROR_CHECK(esp_wifi_set_channel(CONFIG_ESPTNL_CHANNEL, WIFI_SECOND_CHAN_NONE));
 }
 
 QueueHandle_t setupEspNow()
@@ -81,7 +90,7 @@ QueueHandle_t setupEspNow()
   ESP_ERROR_CHECK(s_esp_now_queue == nullptr);
 
   ESP_ERROR_CHECK(esp_now_init());
-  //    ESP_ERROR_CHECK(esp_now_set_pmk(nullptr));
+  ESP_ERROR_CHECK(esp_now_set_pmk((const std::uint8_t*)CONFIG_ESPTNL_PMK));
 
   ESP_ERROR_CHECK(esp_now_register_send_cb(s_cbEspNowSendComplete));
   ESP_ERROR_CHECK(esp_now_register_recv_cb(s_cbEspNowReceiveComplete));