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| author | Antonio Quartulli <ordex@autistici.org> | 2012-02-26 15:39:42 +0100 |
|---|---|---|
| committer | Antonio Quartulli <ordex@autistici.org> | 2012-04-18 09:54:02 +0200 |
| commit | 1e5cc266dbc401d11aefb966ad35e651c2f67414 (patch) | |
| tree | fd920a0dca939ae719066941445cb87d8284969f /net/batman-adv | |
| parent | c97c72b493d7b450005f4054b15679e312c89caa (diff) | |
| download | linux-1e5cc266dbc401d11aefb966ad35e651c2f67414.tar.gz linux-1e5cc266dbc401d11aefb966ad35e651c2f67414.tar.bz2 linux-1e5cc266dbc401d11aefb966ad35e651c2f67414.zip | |
batman-adv: skip the window protection test when the originator has no neighbours
When we receive an OGM from from a node for the first time, the last_real_seqno
field of the orig_node structure has not been initialised yet. The value of this
field is used to compute the current ogm-seqno window and therefore the
protection mechanism will probably drop the packet due to an out-of-window error.
To avoid this situation this patch adds a check to skip the window protection
mechanism if no neighbour nodes have already been added. When the first
neighbour node is added, the last_real_seqno field is initialised too.
Reported-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Diffstat (limited to 'net/batman-adv')
| -rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 1014210bb365..8b2db2e76c7e 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -861,7 +861,8 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, seq_diff = batman_ogm_packet->seqno - orig_node->last_real_seqno; /* signalize caller that the packet is to be dropped. */ - if (window_protected(bat_priv, seq_diff, + if (!hlist_empty(&orig_node->neigh_list) && + window_protected(bat_priv, seq_diff, &orig_node->batman_seqno_reset)) goto out; |