Malformed packets with RIOT sniffer

[kbonset]

I collected packets on an Atmel samr21-xpro via RIOT firmware and sniffer [1]. I was able to see packets in Wireshark with openwsn-dissetors, from an OpenMote running openwsn-fw. However, the packets are listed as malformed. See the attached zipped pcap riot-sniffer.zip.

In Wireshark, the problem looks like the absence of the 802.15.4 FCS bytes in RIOT's capture. However, the capture file uses the format LINKTYPE_IEEE802_15_4_NOFCS (230). Also, the packets are dissected without the malformed tag in stock Wireshark.

Perhaps the problem is the fix [2] for issue #7, which changes dissect_ieee802154_nofcs() to use tvb_captured_length() rather than tvb_reported_length().

[1] https://github.com/RIOT-OS/RIOT/tree/master/dist/tools/sniffer
[2] 7f9b9b5

[twatteyne]

@kbonset, thanks for pointing this out!
@jmmunoz86, I let you answer?