tcpdump mailing list archives
Re: Request new DLT value for raw fibre channel
From: Guy Harris <guy () alum mit edu>
Date: Wed, 22 Jul 2009 12:38:11 -0700
On Jul 22, 2009, at 12:21 PM, Guy Harris wrote:
On Jul 22, 2009, at 11:17 AM, kahou lei wrote:In this case, can you assign me one more value for FC with SOF? The reason is that our module can send out two type of packets: One with SOF, onewithout SOF.So what are the contents of the 4 bytes of SOF?
In particular, is it the 5.3. FC SOF and EOF As described in section 5.1, representation of FC SOF and EOF in an IP Network byte stream requires special formatting and 8-bit code definitions. Therefore, the encapsulated FC frame SHALL have the format shown in Figure 5. The redundancy of the SOF/EOFrepresentation in the encapsulation format results from concerns that
the information be protected from transmission errors. W|------------------------------Bit------------------------------| o| | r| 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3| d|0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1| +---------------+---------------+-------------------------------+ 0| SOF | SOF | -SOF | -SOF | +---------------+---------------+-------------------------------+ 1| | +----- FC frame content -----+ | | +---------------+---------------+-------------------------------+ n| EOF | EOF | -EOF | -EOF | +---------------+---------------+-------------------------------+ Figure 5 - FC Frame Encapsulation Format Note: The number of 8-bit bytes in the FC frame content is always a multiple of four.SOF: The SOF fields contain the encoded SOF value selected from table
2. +-------+------+-------+ +-------+------+-------+ | FC | SOF | | | FC | SOF | | | SOF | Code | Class | | SOF | Code | Class | +-------+------+-------+ +-------+------+-------+ | SOFf | 0x28 | F | | SOFi4 | 0x29 | 4 | | SOFi2 | 0x2D | 2 | | SOFn4 | 0x31 | 4 | | SOFn2 | 0x35 | 2 | | SOFc4 | 0x39 | 4 | | SOFi3 | 0x2E | 3 | +-------+------+-------+ | SOFn3 | 0x36 | 3 | +-------+------+-------+ Table 2 Translation of FC SOF values to SOF field contents -SOF: The -SOF fields contain the one's complement of the value in the SOF fields. Encapsulation receivers SHOULD validate the SOFfield according to a policy defined by the encapsulating protocol.
... Note: FC-BB-2 [6] lists SOF and EOF codes not shown in table 2 andtable 3 (e.g., SOFi1 and SOFn1). However, FC-MI [8] identifies these
codes as not interoperable, so they are not listed in this specification. representation from RFC 3643: http://tools.ietf.org/html/rfc3643 or is it something else? - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 03)
- Re: Request new DLT value for raw fibre channel kahou lei (Jul 15)
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 16)
- Re: Request new DLT value for raw fibre channel kahou lei (Jul 22)
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 22)
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 22)
- Re: Request new DLT value for raw fibre channel kahou lei (Jul 22)
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 23)
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 23)
- Re: Request new DLT value for raw fibre channel kahou lei (Jul 23)
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 23)
- Re: Request new DLT value for raw fibre channel Guy Harris (Jul 16)
- Re: Request new DLT value for raw fibre channel kahou lei (Jul 15)