Henning,
On 11/24/15 10:09 AM, Henning Rogge wrote:
Am 24.11.2015 um 16:00 schrieb Paul Kyzivat:
So you are saying they are mutually exclusive: HELLO message by 9.4, all
other packets by 9.3. Can you make the text clearer about this. As
written it still could be interpreted as applying 9.3 to all packets,
including HELLO, and then applying 9.4 to HELLO packets. (Even though
this is nonsense if you think about it.)
No, it is NOT exclusive...
there is no Hello packet... there are just RFC5444 packets which might
contain one (or in theory multiple) NHDP HELLO messages.
Its the same with IP and UDP... every UDP header is contained in an IP
header. We are talking about two different levels of hierarchy.
DAT is processing both the RFC5444 packet header (which contains the
packet sequence number) of ALL RFC5444 packets and the message content
of the HELLO messages.
OK. But my confusion remains, because there seem to be duplicate actions
in both 9.3 and 9.4 that ought not be done twice. In particular:
9.3:
1. If L_DAT_last_pkt_seqno = UNDEFINED, then:
1. L_DAT_received[TAIL] := 1.
2. L_DAT_total[TAIL] := 1.
9.4:
3. If L_DAT_last_pkt_seqno = UNDEFINED, then:
1. L_DAT_received[TAIL] := L_DAT_received[TAIL] + 1.
2. L_DAT_total[TAIL] := L_DAT_total[TAIL] + 1.
So, if I do 9.3 for every packet, and then also do 9.4 for every HELLO
message within that packet, then I could end up incrementing
L_DAT_received[TAIL] *twice*.
Thanks,
Paul
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