From 838b18e8f9179921627aaa3fb69297df48d37d99 Mon Sep 17 00:00:00 2001
From: PeterKietzmann <peter.kietzmann@haw-hamburg.de>
Date: Tue, 17 Jul 2018 11:50:25 +0200
Subject: [PATCH] drivers/cc2420: add netopt NETOPT_MAX_PACKET_SIZE
---
drivers/cc2420/cc2420_netdev.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/cc2420/cc2420_netdev.c b/drivers/cc2420/cc2420_netdev.c
index fe1f42ccd3..20f741e723 100644
--- a/drivers/cc2420/cc2420_netdev.c
+++ b/drivers/cc2420/cc2420_netdev.c
@@ -38,6 +38,7 @@
#define ENABLE_DEBUG (0)
#include "debug.h"
+#define _MAX_MHR_OVERHEAD (25)
static int _send(netdev_t *netdev, const iolist_t *iolist);
static int _recv(netdev_t *netdev, void *buf, size_t len, void *info);
@@ -187,6 +188,11 @@ static int _get(netdev_t *netdev, netopt_t opt, void *val, size_t max_len)
cc2420_get_addr_long(dev, val);
return 8;
+ case NETOPT_MAX_PACKET_SIZE:
+ assert(max_len >= sizeof(int16_t));
+ *((uint16_t *)val) = CC2420_PKT_MAXLEN - _MAX_MHR_OVERHEAD;
+ return sizeof(int16_t);
+
case NETOPT_NID:
assert(max_len >= sizeof(uint16_t));
return w_u16(val, cc2420_get_pan(dev));
--
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