Commit 9da2924c authored by Tony Cheneau's avatar Tony Cheneau Committed by David S. Miller
Browse files

6lowpan: add debug messages for 6LoWPAN fragmentation 



Add pr_debug() call in order to debug 6LoWPAN fragmentation and
reassembly.

Signed-off-by: default avatarTony Cheneau <tony.cheneau@amnesiak.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d991b98f

net/ieee802154/6lowpan.c

+21 −4
Original line number Diff line number Diff line
@@ -742,10 +742,16 @@ lowpan_process_data(struct sk_buff *skb) 
		/* adds the 3 MSB to the 8 LSB to retrieve the 11 bits length */

		len = ((iphc0 & 7) << 8) | slen;



		/* FRAGN */

		if ((iphc0 & LOWPAN_DISPATCH_MASK) != LOWPAN_DISPATCH_FRAG1) {

		if ((iphc0 & LOWPAN_DISPATCH_MASK) == LOWPAN_DISPATCH_FRAG1) {

			pr_debug("%s received a FRAG1 packet (tag: %d, "

				 "size of the entire IP packet: %d)",

				 __func__, tag, len);

		} else { /* FRAGN */

			if (lowpan_fetch_skb_u8(skb, &offset))

				goto unlock_and_drop;

			pr_debug("%s received a FRAGN packet (tag: %d, "

				 "size of the entire IP packet: %d, "

				 "offset: %d)", __func__, tag, len, offset * 8);

		}



		/*
@@ -762,6 +768,8 @@ lowpan_process_data(struct sk_buff *skb) 


		/* alloc new frame structure */

		if (!found) {

			pr_debug("%s first fragment received for tag %d, "

				 "begin packet reassembly", __func__, tag);

			frame = lowpan_alloc_new_frame(skb, len, tag);

			if (!frame)

				goto unlock_and_drop;
@@ -784,6 +792,9 @@ lowpan_process_data(struct sk_buff *skb) 
			list_del(&frame->list);

			spin_unlock_bh(&flist_lock);



			pr_debug("%s successfully reassembled fragment "

				 "(tag %d)", __func__, tag);



			dev_kfree_skb(skb);

			skb = frame->skb;

			kfree(frame);
@@ -1034,8 +1045,11 @@ lowpan_skb_fragmentation(struct sk_buff *skb) 
	err = lowpan_fragment_xmit(skb, head, header_length, LOWPAN_FRAG_SIZE,

				   0, LOWPAN_DISPATCH_FRAG1);



	if (err)

	if (err) {

		pr_debug("%s unable to send FRAG1 packet (tag: %d)",

			 __func__, tag);

		goto exit;

	}



	offset = LOWPAN_FRAG_SIZE;
@@ -1053,8 +1067,11 @@ lowpan_skb_fragmentation(struct sk_buff *skb) 


		err = lowpan_fragment_xmit(skb, head, header_length,

					   len, offset, LOWPAN_DISPATCH_FRAGN);

		if (err)

		if (err) {

			pr_debug("%s unable to send a subsequent FRAGN packet "

				 "(tag: %d, offset: %d", __func__, tag, offset);

			goto exit;

		}



		offset += len;

	}