1 files changed, 101 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/utils/ipv6_utils.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/utils/ipv6_utils.c
new file mode 100644
index 0000000..8b70cba
--- /dev/null
+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/ipv6_stack/utils/ipv6_utils.c
@@ -0,0 +1,101 @@
+/**
+ * Copyright (c) 2014 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+#include <stdint.h>
+#include <stdbool.h>
+#include "nordic_common.h"
+#include "sdk_common.h"
+#include "sdk_config.h"
+#include "ipv6_utils.h"
+
+void ipv6_checksum_calculate(const uint8_t * p_data, uint16_t len, uint16_t * p_checksum, bool flip_flag)
+{
+    uint16_t checksum_even = (((*p_checksum) & 0xFF00) >> 8);
+    uint16_t checksum_odd  = ((*p_checksum) & 0x00FF);
+
+    while (len)
+    {
+        if ( len == 1 )
+        {
+          checksum_even += (*p_data);
+          len           -= 1;
+        }
+        else
+        {
+          checksum_even += *p_data++;
+          checksum_odd  += *p_data++;
+          len           -= 2;
+        }
+
+        if (checksum_odd & 0xFF00)
+        {
+            checksum_even += ((checksum_odd & 0xFF00) >> 8);
+            checksum_odd   = (checksum_odd & 0x00FF);
+        }
+
+        if (checksum_even & 0xFF00)
+        {
+            checksum_odd += ((checksum_even & 0xFF00) >> 8);
+            checksum_even = (checksum_even & 0x00FF);
+        }
+    }
+
+    checksum_even = (checksum_even << 8) + (checksum_odd & 0xFFFF);
+
+    if (flip_flag)
+    {
+        // We use 0xFFFF instead of 0x0000 because of not operator.
+        if (checksum_even == 0xFFFF)
+        {
+            checksum_even = 0x0000;
+        }
+    }
+
+    (*p_checksum) = (uint16_t)(checksum_even);
+}
+
+void ipv6_header_init(ipv6_header_t * p_ip_header)
+{
+    p_ip_header->version_traffic_class   = IPV6_DEFAULT_VER_TC;
+    p_ip_header->traffic_class_flowlabel = IPV6_DEFAULT_TC_FL;
+    p_ip_header->flowlabel               = IPV6_DEFAULT_FL;
+    p_ip_header->next_header             = IPV6_NEXT_HEADER_RESERVED;
+    p_ip_header->hoplimit                = IPV6_DEFAULT_HOP_LIMIT;
+    p_ip_header->length                  = 0;
+}