On Friday, January 25, 2013 18:12:39 Martin Hundebøll wrote:
To use network coding efficiently, a relay must know when neighbor nodes are likely to have enough information to be able to decode a network coded packet. This is detected by using OGMs from batman-adv to discover when one neighbor is in range of another neighbor. The relay check the TLL to detect when an OGM is forwarded from one neighbor by another neighbor, and thereby knows that the two neighbors are in range and thus overhear packets sent by each other.
This information is saved in the orig_node struct to be used when searching for coding opportunities. Two lists are added to the orig_node struct: One for neighbors that can hear the orig_node (outgoing nc_nodes) and one for neighbors that the orig_node can hear (incoming nc_nodes).
Information about nc_nodes is kept for 10 seconds and is available through debugfs in batman_adv/nc_nodes to use when debugging network coding.
Signed-off-by: Martin Hundebøll martin@hundeboll.net
v3:
- Fixed typos in kernel doc
v4:
- Added missing kernel doc entry for struct batadv_priv_nc
bat_iv_ogm.c | 5 + debugfs.c | 18 +++ main.h | 2 + network-coding.c | 416 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ network-coding.h | 47 +++++++ originator.c | 6 + types.h | 32 +++++ 7 files changed, 526 insertions(+)
Applied in revision 3ed7ada.
Thanks, Marek