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lowpan6.c: ensure netif->hwaddr_len == 8 (to not create invalid frames)

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This commit is contained in:
goldsimon 2018-02-28 21:09:55 +01:00
parent 4f059fea76
commit 5e91cd47c9
1 changed files with 6 additions and 0 deletions
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6
src/netif/lowpan6.c
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@ -65,6 +65,10 @@
#include <string.h>
#if NETIF_MAX_HWADDR_LEN < 8
#error "6LoWPAN netif needs a 64-bit hwaddr"
#endif
/** This is a helper struct for reassembly of fragments
* (IEEE 802.15.4 limits to 127 bytes)
*/
@ -675,6 +679,7 @@ lowpan6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr)
} else
#endif /* LWIP_6LOWPAN_INFER_SHORT_ADDRESS */
{
LWIP_ASSERT("6LowPAN needs netif->hwaddr_len == 8", netif->hwaddr_len == 8);
src.addr_len = netif->hwaddr_len;
SMEMCPY(src.addr, netif->hwaddr, netif->hwaddr_len);
}
@ -717,6 +722,7 @@ lowpan6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr)
}
/* Send out the packet using the returned hardware address. */
LWIP_ASSERT("6LowPAN needs netif->hwaddr_len == 8", netif->hwaddr_len == 8);
dest.addr_len = netif->hwaddr_len;
SMEMCPY(dest.addr, hwaddr, netif->hwaddr_len);
MIB2_STATS_NETIF_INC(netif, ifoutucastpkts);