From 49a04fb70986941c5edb3923c805fe29ede04050 Mon Sep 17 00:00:00 2001
From: Antonio Quartulli <ordex@autistici.org>
Date: Thu, 7 Jul 2011 14:24:34 +0200
Subject: [PATCH] --- yaml --- r: 256159 b: refs/heads/master c:
 a7f9becb7d27008af0f72f8449c110276b0df37d h: refs/heads/master i:   256157:
 afaec937c56226d07c212a3f00d0dab0504b3227   256155:
 b160a9eeed2a5b1f5b5169035ea7b7cc53f7a392   256151:
 9c3e4ad1ab26707cf462e6ceae739ec4b5f2fb9d   256143:
 5156b8a2cb3c82088f2328d3efc97dbd34cd7cd8   256127:
 1707a0614a5d9fae2b09a765d0e33bbe7d3aee1f v: v3

---
 [refs]                         |  2 +-
 trunk/net/batman-adv/routing.c | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index c43fd810d2ee..59ed115190fb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 980d55b20a730cbabc74cdc57be9c47713dba57b
+refs/heads/master: a7f9becb7d27008af0f72f8449c110276b0df37d
diff --git a/trunk/net/batman-adv/routing.c b/trunk/net/batman-adv/routing.c
index 2cb98bed1586..0f32c818874d 100644
--- a/trunk/net/batman-adv/routing.c
+++ b/trunk/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;