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6lowpan: add debug messages for 6LoWPAN fragmentation

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

Signed-off-by: Tony Cheneau <tony.cheneau@amnesiak.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tony Cheneau 2013-03-25 17:59:27 +00:00 committed by David S. Miller
parent d991b98f50
commit 9da2924c4b
1 changed files with 21 additions and 4 deletions
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25
net/ieee802154/6lowpan.c
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@ -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;
}