From 02395e593d76c02d52a6c9e5a133583e3d993e92 Mon Sep 17 00:00:00 2001
From: Bas Stottelaar <basstottelaar@gmail.com>
Date: Tue, 10 Apr 2018 23:59:50 +0200
Subject: [PATCH] sys: netopt: add checksum option

---
 sys/include/net/netopt.h           | 7 +++++++
 sys/net/crosslayer/netopt/netopt.c | 1 +
 sys/shell/commands/sc_gnrc_netif.c | 8 +++++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/sys/include/net/netopt.h b/sys/include/net/netopt.h
index 15744b27ca..132bc20fc2 100644
--- a/sys/include/net/netopt.h
+++ b/sys/include/net/netopt.h
@@ -539,6 +539,13 @@ typedef enum {
      */
     NETOPT_BLE_CTX,
 
+    /**
+     * @brief   (@ref netopt_enable_t) enable hardware checksumming
+     *
+     * If enabled, enable hardware checksumming of incoming frames.
+     */
+    NETOPT_CHECKSUM,
+
     /* add more options if needed */
 
     /**
diff --git a/sys/net/crosslayer/netopt/netopt.c b/sys/net/crosslayer/netopt/netopt.c
index e9ba46d5a4..4f1355a1e0 100644
--- a/sys/net/crosslayer/netopt/netopt.c
+++ b/sys/net/crosslayer/netopt/netopt.c
@@ -90,6 +90,7 @@ static const char *_netopt_strmap[] = {
     [NETOPT_TX_RETRIES_NEEDED]     = "NETOPT_TX_RETRIES_NEEDED",
     [NETOPT_6LO_IPHC]              = "NETOPT_6LO_IPHC",
     [NETOPT_BLE_CTX]               = "NETOPT_BLE_CTX",
+    [NETOPT_CHECKSUM]              = "NETOPT_CHECKSUM",
     [NETOPT_NUMOF]                 = "NETOPT_NUMOF",
 };
 
diff --git a/sys/shell/commands/sc_gnrc_netif.c b/sys/shell/commands/sc_gnrc_netif.c
index 403fbadb8f..46b48411ee 100644
--- a/sys/shell/commands/sc_gnrc_netif.c
+++ b/sys/shell/commands/sc_gnrc_netif.c
@@ -71,7 +71,8 @@ static const struct {
     { "rtr_adv", NETOPT_IPV6_SND_RTR_ADV },
     { "iq_invert", NETOPT_IQ_INVERT },
     { "rx_single", NETOPT_SINGLE_RECEIVE },
-    { "chan_hop", NETOPT_CHANNEL_HOP }
+    { "chan_hop", NETOPT_CHANNEL_HOP },
+    { "checksum", NETOPT_CHECKSUM },
 };
 
 /* utility functions */
@@ -150,6 +151,7 @@ static void _set_usage(char *cmd_name)
          "       * \"freq\" - sets the \"channel\" center frequency\n"
          "       * \"channel\" - sets the frequency channel\n"
          "       * \"chan\" - alias for \"channel\"\n"
+         "       * \"checksum\" - set checksumming on-off\n"
          "       * \"csma_retries\" - set max. number of channel access attempts\n"
          "       * \"encrypt\" - set the encryption on-off\n"
          "       * \"hop_limit\" - set hop limit\n"
@@ -276,6 +278,10 @@ static void _print_netopt(netopt_t opt)
             printf("coding rate");
             break;
 
+        case NETOPT_CHECKSUM:
+            printf("checksum");
+            break;
+
         default:
             /* we don't serve these options here */
             break;