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authorAntonio Quartulli <ordex@autistici.org>2012-02-26 15:39:42 +0100
committerAntonio Quartulli <ordex@autistici.org>2012-04-18 09:54:02 +0200
commit1e5cc266dbc401d11aefb966ad35e651c2f67414 (patch)
treefd920a0dca939ae719066941445cb87d8284969f /net/batman-adv/bat_iv_ogm.c
parentc97c72b493d7b450005f4054b15679e312c89caa (diff)
downloadop-kernel-dev-1e5cc266dbc401d11aefb966ad35e651c2f67414.zip
op-kernel-dev-1e5cc266dbc401d11aefb966ad35e651c2f67414.tar.gz
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/bat_iv_ogm.c')
-rw-r--r--net/batman-adv/bat_iv_ogm.c3
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 1014210..8b2db2e 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;
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