summaryrefslogtreecommitdiffstats
path: root/net/batman-adv/main.h
diff options
context:
space:
mode:
authorSimon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de>2012-01-22 20:00:19 +0100
committerAntonio Quartulli <ordex@autistici.org>2012-04-11 14:28:58 +0200
commit23721387c409087fd3b97e274f34d3ddc0970b74 (patch)
treecf386c6f169a1b2b6e8c8ef77be5226e10046689 /net/batman-adv/main.h
parenta7f6ee9493677ba40625d810258de5bd521cc1b0 (diff)
downloadop-kernel-dev-23721387c409087fd3b97e274f34d3ddc0970b74.zip
op-kernel-dev-23721387c409087fd3b97e274f34d3ddc0970b74.tar.gz
batman-adv: add basic bridge loop avoidance code
This second version of the bridge loop avoidance for batman-adv avoids loops between the mesh and a backbone (usually a LAN). By connecting multiple batman-adv mesh nodes to the same ethernet segment a loop can be created when the soft-interface is bridged into that ethernet segment. A simple visualization of the loop involving the most common case - a LAN as ethernet segment: node1 <-- LAN --> node2 | | wifi <-- mesh --> wifi Packets from the LAN (e.g. ARP broadcasts) will circle forever from node1 or node2 over the mesh back into the LAN. With this patch, batman recognizes backbone gateways, nodes which are part of the mesh and backbone/LAN at the same time. Each backbone gateway "claims" clients from within the mesh to handle them exclusively. By restricting that only responsible backbone gateways may handle their claimed clients traffic, loops are effectively avoided. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Diffstat (limited to 'net/batman-adv/main.h')
-rw-r--r--net/batman-adv/main.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 7a6a25f..82723b5 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -80,6 +80,9 @@
#define MAX_AGGREGATION_BYTES 512
#define MAX_AGGREGATION_MS 100
+#define BLA_PERIOD_LENGTH 10000 /* 10 seconds */
+#define BLA_BACKBONE_TIMEOUT (BLA_PERIOD_LENGTH * 3)
+#define BLA_CLAIM_TIMEOUT (BLA_PERIOD_LENGTH * 10)
/* don't reset again within 30 seconds */
#define RESET_PROTECTION_MS 30000
#define EXPECTED_SEQNO_RANGE 65536
@@ -117,7 +120,8 @@ enum dbg_level {
DBG_BATMAN = 1 << 0,
DBG_ROUTES = 1 << 1, /* route added / changed / deleted */
DBG_TT = 1 << 2, /* translation table operations */
- DBG_ALL = 7
+ DBG_BLA = 1 << 3, /* bridge loop avoidance */
+ DBG_ALL = 15
};
/* Kernel headers */
OpenPOWER on IntegriCloud