Lustre discuss - Mar 2007 - Some strange values for lnet_hdr fields

Hi,

In analyzing dump of lnet_hdr I notice some strange values i don''t 
understand :

Below is a lnet_hdr screenshot for LNET_MSG_HELLO:

0000: ed 0d bc ee 01 00 00 00 65 01 01 0e 00 00 02 00    ........e.......
0010: 04 00 00 00 39 30 00 00 04 00 00 00 04 00 00 00    ....90..........
0020: 02 c2 3f 9b 30 2c 04 00 02 00 00 00 10 00 00 00    ..?.0,..........
0030: 02 00 03 fe 0e 01 01 65 00 00 00 00 00 00 00 00    .......e........
0040: 02 00 00 00 00 00 00 00 65 01 01 0e                        
........e...


I get :
    - 0xeebc0ded which is magic number for TCP (no pb)
    - 0x00000001 for protocol version 1 (no pb)
    - 0x000200000e010165 :
                            0e010165 is the peer''s nid (no pb) but what
is/means 00020000 ?
    - the 2 next fields are for pids, dest_pid=00000004 (but sometimes i 
get 81e69fca or 0) and src_pid=00003039  (12345 in decimal which is the 
normal pid)
    - 0x00000004 for type (LNET_MSG_HELLO ,no pb)
    - 0x00000004 for payload_length (sometimes 0)

But in lib-types.h it is notified that :

/* A  message contains a magic number and protocol version
 * code in the header''s dest_nid, the peer''s NID in the
src_nid, and
 * LNET_MSG_HELLO in the type field.  All other common fields are zero
 * (including payload_size; i.e. no payload). 

What are/mean non-zero values i get ? (pids, payload_length)

Moreover, lnet_hello_t struct contains 2 fields :
    - incarnation and type

Incarnation looks like a cookie, is it?
I get type=1 or 2 or 3 what does it mean?

Regards,

Thibault DONADINI