From c5b563f8e1ba4321cf9d572356f5531be176eb4c Mon Sep 17 00:00:00 2001
From: Laurent Deru <laurent.deru@cetic.be>
Date: Fri, 12 Jun 2015 16:02:50 +0200
Subject: [PATCH] Estimated fragments should take into account 802.15.4 header
 size

---
 core/net/ipv6/sicslowpan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/net/ipv6/sicslowpan.c b/core/net/ipv6/sicslowpan.c
index 62b9014c5..a19f758fc 100644
--- a/core/net/ipv6/sicslowpan.c
+++ b/core/net/ipv6/sicslowpan.c
@@ -1455,7 +1455,7 @@ output(const uip_lladdr_t *localdest)
      * IPv6/HC1/HC06/HC_UDP dispatchs/headers.
      * The following fragments contain only the fragn dispatch.
      */
-    int estimated_fragments = ((int)uip_len) / ((int)MAC_MAX_PAYLOAD - SICSLOWPAN_FRAGN_HDR_LEN) + 1;
+    int estimated_fragments = ((int)uip_len) / (max_payload - SICSLOWPAN_FRAGN_HDR_LEN) + 1;
     int freebuf = queuebuf_numfree() - 1;
     PRINTFO("uip_len: %d, fragments: %d, free bufs: %d\n", uip_len, estimated_fragments, freebuf);
     if(freebuf < estimated_fragments) {