Unfortunately there is no document online, but the structure is quite simple,
it's just a 32-bit value containing some bit fields:
typedef struct
{
uint32_t uiErrorCode : 8;
uint32_t uiGpio : 1;
uint32_t uiTransparent : 1;
uint32_t uiHeaVersion : 4;
uint32_t uiPort : 2;
uint32_t uiLength : 12;
uint32_t uiReserved : 4;
} NETANA_HEADER_BIT_T;
typedef union
{
uint32_t val;
NETANA_HEADER_BIT_T bf;
} NETANA_HEADER_T;
uiErrorCode is a bit-field containing following bits:
0: MII RX_ER present
1: Alignment error present
2: FCS error present
3: Frame too long
4: SFD error present
5: Frame shorter than 64 bytes
6: Preamble shorter than 7 bytes
7: Preamble longer than 7 bytes
uiGpio:
0: comes for Ethernet port
1: comes for GPIO port
uiTransparent:
0: normal Ethernet mode
1: transparent capture mode
uiHeaVersion:
version info, always decimal 1
uiPort:
capture port/GPIO number 0..3
uiLength:
real frame length in bytes
uiReserved:
reserved for future use
Everything little-endian representation.
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Guy Harris
Gesendet: Dienstag, 30. August 2011 18:48
An: [email protected]
Betreff: Re: [tcpdump-workers] Request for new Link-layer header type
On Aug 30, 2011, at 7:29 AM, <[email protected]> wrote:
> for our analysis product netANALYZER I would like to request a new
> link-layer header type value:
>
> LINKTYPE_NETANALYZER
>
> DLT_NETANALYZER
>
> Description: "Hilscher netANALYZER link-layer type to provide additional
> information for encapsulated Ethernet frames."
Is there a document online that describes where the additional information
appears and what form it has, so that we can link to it from the entry in
http://www.tcpdump.org/linktypes.html
If not, could you supply that information, so we can create our own page to
describe it and link to it from that entry?-
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Rheinstr. 15, 65795 Hattersheim
Sitz der Gesellschaft: Hattersheim
Geschäftsführer: Hans-Jürgen Hilscher
Registergericht: Amtsgericht Frankfurt/Main
Handelsregister: Frankfurt B 26873
www.hilscher.com
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