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authorAntonio Quartulli <ordex@autistici.org>2011-04-27 14:27:57 +0200
committerSven Eckelmann <sven@narfation.org>2011-06-20 11:37:27 +0200
commitcc47f66e6b9ec7e7d465f74739a6fc9844593894 (patch)
tree8fbda7f59267bca45f9e887d09ba1de2f3c62f8d /net/batman-adv/translation-table.h
parenta73105b8d4c765d9ebfb664d0a66802127d8e4c7 (diff)
batman-adv: improved roaming mechanism
With the current client announcement implementation, in case of roaming, an update is triggered on the new AP serving the client. At that point the new information is spread around by means of the OGM broadcasting mechanism. Until this operations is not executed, no node is able to correctly route traffic towards the client. This obviously causes packet drops and introduces a delay in the time needed by the client to recover its connections. A new packet type called ROAMING_ADVERTISEMENT is added to account this issue. This message is sent in case of roaming from the new AP serving the client to the old one and will contain the client MAC address. In this way an out-of-OGM update is immediately committed, so that the old node can update its global translation table. Traffic reaching this node will then be redirected to the correct destination utilising the fresher information. Thus reducing the packet drops and the connection recovery delay. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
Diffstat (limited to 'net/batman-adv/translation-table.h')
-rw-r--r--net/batman-adv/translation-table.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h
index 51f7e3060f6..1cd2d39529f 100644
--- a/net/batman-adv/translation-table.h
+++ b/net/batman-adv/translation-table.h
@@ -28,20 +28,20 @@ int tt_changes_fill_buffer(struct bat_priv *bat_priv,
int tt_init(struct bat_priv *bat_priv);
void tt_local_add(struct net_device *soft_iface, const uint8_t *addr);
void tt_local_remove(struct bat_priv *bat_priv,
- const uint8_t *addr, const char *message);
+ const uint8_t *addr, const char *message, bool roaming);
int tt_local_seq_print_text(struct seq_file *seq, void *offset);
void tt_global_add_orig(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const unsigned char *tt_buff, int tt_buff_len);
int tt_global_add(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
- uint8_t ttvn);
+ uint8_t ttvn, bool roaming);
int tt_global_seq_print_text(struct seq_file *seq, void *offset);
void tt_global_del_orig(struct bat_priv *bat_priv,
struct orig_node *orig_node, const char *message);
void tt_global_del(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
- const char *message);
+ const char *message, bool roaming);
struct orig_node *transtable_search(struct bat_priv *bat_priv,
const uint8_t *addr);
void tt_save_orig_buffer(struct bat_priv *bat_priv, struct orig_node *orig_node,
@@ -60,5 +60,7 @@ void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr);
void handle_tt_response(struct bat_priv *bat_priv,
struct tt_query_packet *tt_response);
+void send_roam_adv(struct bat_priv *bat_priv, uint8_t *client,
+ struct orig_node *orig_node);
#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */