2015-07-27 10:03 GMT+02:00 Baptiste Clenet <bapclenet@xxxxxxxxx>:
> Here is what Wireshark gives me when I ping my board A from another
> board B (same kind of board with same image flashed):
>
> No. Time Source Destination
> Protocol Length Info
> 8 37.192838000 ::6e47:e81e:40bf:d4f3 ff01::ff:3ec7:f187 IGMPv0
> 82 Unknown Type:0x00
EDIT: I've just noticed that the source address is wrong, ifconfig
lowpan0 ont board A (which pings):
root@OpenWrt:/# ifconfig lowpan0
lowpan0 Link encap:UNSPEC HWaddr
6C-47-E8-1E-40-BF-D4-73-00-00-00-00-00-00-00-00
inet6 addr: fe80::6e47:e81e:40bf:d473/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1280 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> Frame 8: 82 bytes on wire (656 bits), 82 bytes captured (656 bits) on
> interface 0
> Interface id: 0
> Encapsulation type: Linux cooked-mode capture (25)
> Arrival Time: Jul 24, 2015 15:28:52.786786000 CEST
> [Time shift for this packet: 0.000000000 seconds]
> Epoch Time: 1437744532.786786000 seconds
> [Time delta from previous captured frame: 34.054126000 seconds]
> [Time delta from previous displayed frame: 34.054126000 seconds]
> [Time since reference or first frame: 37.192838000 seconds]
> Frame Number: 8
> Frame Length: 82 bytes (656 bits)
> Capture Length: 82 bytes (656 bits)
> [Frame is marked: False]
> [Frame is ignored: False]
> [Protocols in frame: sll:wpan:6lowpan:ipv6:igmp]
> [Number of per-protocol-data: 1]
> [IEEE 802.15.4 Low-Rate Wireless PAN, key 0]
> [Coloring Rule Name: Routing]
> [Coloring Rule String: hsrp || eigrp || ospf || bgp || cdp || vrrp
> || gvrp || igmp || ismp]
>
> Linux cooked capture
> Packet type: Unicast to another host (3)
> Link-layer address type: 805
> Link-layer address length: 0
> Protocol: IEEE 802.15.4 (0x00f6)
>
> IEEE 802.15.4 Data, Dst: Broadcast, Src: 6c:47:e81e:40:bfd4:f3
> Frame Control Field: Data (0xc841)
> Sequence Number: 80
> Destination PAN: 0xbeef
> Destination: 0xffff
> Extended Source: 6c:47:e81e:40:bfd4:f3 (6c:47:e8:1e:40:bf:d4:f3)
> FCS: 0xdff3 (Correct)
>
> 6LoWPAN
> IPHC Header
> 011. .... = Pattern: IP header compression (0x03)
> ...1 1... .... .... = Traffic class and flow label: Version,
> traffic class, and flow label compressed (0x0003)
> .... .0.. .... .... = Next header: Inline
> .... ..11 .... .... = Hop limit: 255 (0x0003)
> .... .... 1... .... = Context identifier extension: True
> .... .... .1.. .... = Source address compression: Stateful
> .... .... ..11 .... = Source address mode: Compressed (0x0003)
> //it is definitely 3
> .... .... .... 1... = Multicast address compression: True
> .... .... .... .0.. = Destination address compression: Stateless
> .... .... .... ..01 = Destination address mode: 48-bits inline (0x0001)
> 0011 .... = Source context identifier: 0x03
> .... 1010 = Destination context identifier: 0x0a
> [Destination context: fe80:: (fe80::)]
> Next header: IGMP (0x02)
> Source: ::6e47:e81e:40bf:d4f3 (::6e47:e81e:40bf:d4f3)
> Destination: ff01::ff:3ec7:f187 (ff01::ff:3ec7:f187)
>
> Internet Protocol Version 6, Src: ::6e47:e81e:40bf:d4f3
> (::6e47:e81e:40bf:d4f3), Dst: ff01::ff:3ec7:f187 (ff01::ff:3ec7:f187)
> 0110 .... = Version: 6
> .... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
> .... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
> Payload length: 39
> Next header: IGMP (2)
> Hop limit: 255
> Source: ::6e47:e81e:40bf:d4f3 (::6e47:e81e:40bf:d4f3)
> Destination: ff01::ff:3ec7:f187 (ff01::ff:3ec7:f187)
> [Source GeoIP: Unknown]
> [Destination GeoIP: Unknown]
>
> Internet Group Management Protocol
> [IGMP Version: 0]
> Type: Unknown (0x00)
> Reply Pending: 220
> Header checksum: 0xe700 [incorrect, should be 0x63eb]
> Identifier: 254
> Multicast Address: 128.0.0.0 (128.0.0.0)
> Access Key: 000000a8afac69e5
> Type: Unknown (0x00)
> Data
>
> Which are all the ways to change the SAM value? It is definitely
> changed somehow before sending.
>
--
Baptiste
--
To unsubscribe from this list: send the line "unsubscribe linux-wpan" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
