From: Alexander Aring <alex.ar...@gmail.com>
Date: Fri, 21 Feb 2014 19:58:58 +0100
> + err = lowpan_fragment_xmit(skb, head, header_length,
> + frag_plen + lowpan_size, 0,
> + LOWPAN_DISPATCH_FRAG1);
> if (err) {
> pr_debug("%s unable to send FRAG1 packet (tag: %d)",
> __func__, tag);
> goto exit;
> }
>
> - offset = LOWPAN_FRAG_SIZE;
> + offset = lowpan_size + frag_plen;
> + dgram_offset = mac_cb(skb)->frag_info.d_offset + frag_plen;
This isn't going to work.
Once you call dev_queue_xmit(), the skb control block can be reused by
other layers. In particular the device qdisc layer is going to
scramble the control block on you.
Once a packet travels from one layer to another, SKB control block
is likewise transferred.
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