From 282e1601efcf1f518ef4a500593e119da0ae07c8 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Fri, 2 Mar 2018 12:56:55 +0100
Subject: [PATCH] finally got zepif running

---
 src/netif/lowpan6.c |  2 +-
 src/netif/zepif.c   | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/netif/lowpan6.c b/src/netif/lowpan6.c
index 3d92db00..6d23b3f9 100644
--- a/src/netif/lowpan6.c
+++ b/src/netif/lowpan6.c
@@ -409,7 +409,7 @@ lowpan6_frag(struct netif *netif, struct pbuf *p, const struct ieee_802154_addr
     MIB2_STATS_NETIF_INC(netif, ifoutdiscards);
     return ERR_MEM;
   }
-  LWIP_ASSERT("this needs a pbuf in one piece", p->len == p->tot_len);
+  LWIP_ASSERT("this needs a pbuf in one piece", p_frag->len == p_frag->tot_len);
 
   /* Write IEEE 802.15.4 header. */
   buffer = (u8_t *)p_frag->payload;
diff --git a/src/netif/zepif.c b/src/netif/zepif.c
index 66ecac87..1df65474 100644
--- a/src/netif/zepif.c
+++ b/src/netif/zepif.c
@@ -55,6 +55,7 @@
 
 #include "netif/lowpan6.h"
 #include "lwip/udp.h"
+#include "lwip/timeouts.h"
 #include <string.h>
 
 /** Define this to 1 to loop back TX packets for testing */
@@ -92,6 +93,18 @@ struct zepif_state {
   u32_t seqno;
 };
 
+static u8_t zep_lowpan_timer_running;
+
+/* Helper function that calls the 6LoWPAN timer and reschedules itself */
+static void
+zep_lowpan_timer(void *arg)
+{
+  lowpan6_tmr();
+  if (zep_lowpan_timer_running) {
+    sys_timeout(LOWPAN6_TMR_INTERVAL, zep_lowpan_timer, arg);
+  }
+}
+
 /* Pass received pbufs into 6LowPAN netif */
 static void
 zepif_udp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p,
@@ -138,6 +151,9 @@ zepif_udp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p,
   if (pbuf_remove_header(p, sizeof(struct zep_hdr))) {
     goto err_return;
   }
+  /* TODO Check CRC? */
+  /* remove CRC trailer */
+  pbuf_realloc(p, p->tot_len - 2);
 
   /* Call tcpip_6lowpan_input here, not netif->input as we know the direct call
    * stack won't work as we could enter udp_input twice. */
@@ -259,6 +275,12 @@ zepif_init(struct netif *netif)
       netif->hwaddr[0] &= 0xfc;
     }
     netif->linkoutput = zepif_linkoutput;
+
+    if (!zep_lowpan_timer_running) {
+      sys_timeout(LOWPAN6_TMR_INTERVAL, zep_lowpan_timer, NULL);
+      zep_lowpan_timer_running = 1;
+    }
+
     return ERR_OK;
   }