Update LICENSE

Author: ciniml

LICENSE

@@ -1,6 +1,4 @@
 Copyright (c) 2021 Kenta Ida (fuga@fugafuga.org)
-
-The original license is below:
 Copyright (c) 2021 Daniel Hope (www.floorsense.nz)
 All rights reserved.
 

src/WireGuard.cpp

@@ -1,3 +1,7 @@
+/*
+ * WireGuard implementation for ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
 #include "WireGuard.hpp"
 
 #include "freertos/FreeRTOS.h"
@@ -89,6 +93,7 @@ void WireGuard::begin(const IPAddress& localIP, const char* privateKey, const ch
 		// Start outbound connection to peer
         ESP_LOGI(TAG, "connecting wireguard...");
 		wireguardif_connect(wg_netif, wireguard_peer_index);
+		// Set default interface to WG device.
         netif_set_default(wg_netif);
 	}
 }

src/WireGuard.hpp

@@ -1,3 +1,7 @@
+/*
+ * WireGuard implementation for ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
 #pragma once
 #include <IPAddress.h>
 

src/wireguard-platform.c

@@ -1,3 +1,8 @@
+/*
+ * WireGuard implementation for ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
 #include "wireguard-platform.h"
 
 #include <stdlib.h>
@@ -7,8 +12,6 @@
 #include "mbedtls/ctr_drbg.h"
 #include "esp_system.h"
 
-// This file contains a sample Wireguard platform integration
-
 static struct mbedtls_ctr_drbg_context random_context;
 static struct mbedtls_entropy_context entropy_context;
 
@@ -39,13 +42,14 @@ void wireguard_tai64n_now(uint8_t *output) {
 	// See https://cr.yp.to/libtai/tai64.html
 	// 64 bit seconds from 1970 = 8 bytes
 	// 32 bit nano seconds from current second
-	
+
+	// Get timestamp. Note that the timestamp must be synced by NTP, 
+	//  or at least preserved in NVS, not to go back after reset.
+	// Otherwise, the WireGuard remote peer rejects handshake.
 	struct timeval tv;
 	gettimeofday(&tv, NULL);
 	uint64_t millis = (tv.tv_sec * 1000LL + (tv.tv_usec / 1000LL));
 
-	// uint64_t millis = sys_now();
-	
 	// Split into seconds offset + nanos
 	uint64_t seconds = 0x400000000000000aULL + (millis / 1000);
 	uint32_t nanos = (millis % 1000) * 1000;

src/wireguard-platform.h

@@ -1,4 +1,7 @@
 /*
+ * Ported to ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * The original license is below:
+ * 
  * Copyright (c) 2021 Daniel Hope (www.floorsense.nz)
  * All rights reserved.
  *

src/wireguard.c

@@ -1,4 +1,7 @@
 /*
+ * Ported to ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * The original license is below:
+ * 
  * Copyright (c) 2021 Daniel Hope (www.floorsense.nz)
  * All rights reserved.
  *

src/wireguard.h

@@ -1,4 +1,6 @@
 /*
+ * Ported to ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * The original license is below:
  * Copyright (c) 2021 Daniel Hope (www.floorsense.nz)
  * All rights reserved.
  *

src/wireguardif.c

@@ -1,4 +1,7 @@
 /*
+ * Ported to ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * The original license is below:
+ * 
  * Copyright (c) 2021 Daniel Hope (www.floorsense.nz)
  * All rights reserved.
  *

src/wireguardif.h

@@ -1,4 +1,7 @@
 /*
+ * Ported to ESP32 Arduino by Kenta Ida (fuga@fugafuga.org)
+ * The original license is below:
+ * 
  * Copyright (c) 2021 Daniel Hope (www.floorsense.nz)
  * All rights reserved.
  *