diff options
Diffstat (limited to 'net/batman-adv')
| -rw-r--r-- | net/batman-adv/routing.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 2cb98bed1586..0f32c818874d 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -91,6 +91,18 @@ static void update_transtable(struct bat_priv *bat_priv, * to recompute it to spot any possible inconsistency * in the global table */ orig_node->tt_crc = tt_global_crc(bat_priv, orig_node); + + /* The ttvn alone is not enough to guarantee consistency + * because a single value could repesent different states + * (due to the wrap around). Thus a node has to check whether + * the resulting table (after applying the changes) is still + * consistent or not. E.g. a node could disconnect while its + * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case + * checking the CRC value is mandatory to detect the + * inconsistency */ + if (orig_node->tt_crc != tt_crc) + goto request_table; + /* Roaming phase is over: tables are in sync again. I can * unset the flag */ orig_node->tt_poss_change = false; |