From 2fdc1d9134f5dacfbcf0d181065d0666121f4c24 Mon Sep 17 00:00:00 2001
From: Simon Duquennoy <simon.duquennoy@gmail.com>
Date: Fri, 14 Jul 2017 14:41:42 +0200
Subject: [PATCH] 6LoWPAN: discard empty packet

---
 core/net/ipv6/sicslowpan.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/net/ipv6/sicslowpan.c b/core/net/ipv6/sicslowpan.c
index 95064e8ea..c5ccf91b1 100644
--- a/core/net/ipv6/sicslowpan.c
+++ b/core/net/ipv6/sicslowpan.c
@@ -1726,6 +1726,11 @@ input(void)
   /* The MAC puts the 15.4 payload inside the packetbuf data buffer */
   packetbuf_ptr = packetbuf_dataptr();
 
+  if(packetbuf_datalen() == 0) {
+    LOG_WARN("empty packet\n");
+    return;
+  }
+
   /* This is default uip_buf since we assume that this is not fragmented */
   buffer = (uint8_t *)UIP_IP_BUF;