Repository : ssh://git@diktynna/doc

On branches: backup-redmine/2023-01-14,main

commit 41be84cab8408a28ee7476629f665a67d57c9ac7 Author: Linus L��ssing linus.luessing@c0d3.blue Date: Mon Dec 26 14:29:39 2022 +0000

doc: batman-adv/Multicast-Packet-Type

41be84cab8408a28ee7476629f665a67d57c9ac7 batman-adv/Multicast-Packet-Type.textile | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/batman-adv/Multicast-Packet-Type.textile b/batman-adv/Multicast-Packet-Type.textile index ca556c03..f39888ae 100644 --- a/batman-adv/Multicast-Packet-Type.textile +++ b/batman-adv/Multicast-Packet-Type.textile @@ -25,7 +25,7 @@ For more details see:

h2. Technical Specification

-MCAST packet type header: +h3. MCAST packet type header

<pre><code> 0 1 2 3 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 @@ -48,7 +48,7 @@ MCAST packet type header: * Data: Encapsulated ethernet frame with 2 byte alignment (to make IP packets 4 byte aligned)

-MCAST Tracker TVLV: +h3. MCAST Tracker TVLV

<pre><code> 0 1 2 3 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 @@ -74,9 +74,16 @@ MCAST Tracker TVLV: * #Num Dests: Number of destinations (originator MAC addresses) * [padding]: Optional, only present if #Num Dests are even, to make Tracker TVLV 4 byte aligned (to make encapsulated IP packets 4 byte aligned)

-h4. -Preparations for Multicast Tracker Packets (future enhancements) -- --The fields _Tracker-ID_ and _MCAST Address_ will not be used in the initial implementation of the batman-adv multicast packet type. But they are in preparation for the future enhancements where control and data plane can be separated. That is where batman-adv multicast packets can also be send without _Data_ (_Multicast Tracker Packets_) and the destinations are cached on nodes on the path. And then further batman-adv multicast packets could be send with _Data_ but with a zero length TVLV, so without the destination addresses.- +h3. OGM Multicast TVLV flags + +The following flag is added to the [[Multicast-optimizations-tech#Multicast-TVLV|MCAST flags]] in the multicast TVLV of an OGM: + +h4. BATADV_MCAST_HAVE_MC_PTYPE_CAPA (Bit 5): + +Signalizes that: + +# This node is capable of receiving, parsing and forwarding a batman-adv multicast packet with a multicast tracker TVLV. +# All hard interfaces of this node have an MTU of at least 1280.

h2. Implementation Tasks