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| author | Tony Cheneau <tony.cheneau@amnesiak.org> | 2013-03-25 17:59:27 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-26 12:37:57 -0400 |
| commit | 9da2924c4ba8da5f41285c98eb1ba9aee99344a4 (patch) | |
| tree | 56c030022bc76dccdc3283f348591278bcd8c3d1 | |
| parent | d991b98f5006e36b7ee9f8ef89ed3a8636692d69 (diff) | |
| download | linux-9da2924c4ba8da5f41285c98eb1ba9aee99344a4.tar.gz linux-9da2924c4ba8da5f41285c98eb1ba9aee99344a4.tar.bz2 linux-9da2924c4ba8da5f41285c98eb1ba9aee99344a4.zip | |
6lowpan: add debug messages for 6LoWPAN fragmentation
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>
| -rw-r--r-- | net/ieee802154/6lowpan.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c index 4a62289669b1..61eee9d0dd21 100644 --- a/net/ieee802154/6lowpan.c +++ b/net/ieee802154/6lowpan.c @@ -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; } |