On Thu, 2013-11-14 at 16:48 +0100, Alexander Aring wrote:
> Bit 5 of "UDP LOWPAN_NHC Format" indicate that the checksum can be elided.
> The host need to calculate the udp checksum afterwards but this isn't
> supported right now.
[]
> diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
[]
> @@ -448,9 +448,14 @@ lowpan_uncompress_udp_header(struct sk_buff *skb, struct
> udphdr *uh)
> pr_debug("uncompressed UDP ports: src = %d, dst = %d\n",
> ntohs(uh->source), ntohs(uh->dest));
>
> - /* copy checksum */
> - memcpy(&uh->check, &skb->data[0], 2);
> - skb_pull(skb, 2);
> + /* checksum */
> + if (tmp & LOWPAN_NHC_UDP_CS_C) {
> + pr_debug("checksum elided currently not supported");
This looks like it could need ratelimiting
Also, it should end in "\n". Maybe use:
pr_debug_ratelimited("checksum elided currently not supported\n");
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