[13/13] batman-adv: Add sequence number and duplicate checks for unicasts_safe
Commit Message
With the new redundant bonding mode a node might receive a unicast_safe
packet more than once. Therefore duplicate checks on any unicast_safe
packet need to be performed before further processing.
Signed-off-by: Linus Lüssing <linus.luessing@ascom.ch>
---
originator.c | 3 +++
routing.c | 14 +++++++++++++-
types.h | 2 ++
3 files changed, 18 insertions(+), 1 deletions(-)
@@ -204,6 +204,7 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
INIT_LIST_HEAD(&orig_node->bond_list);
spin_lock_init(&orig_node->ogm_cnt_lock);
spin_lock_init(&orig_node->bcast_seqno_lock);
+ spin_lock_init(&orig_node->ucast_safe_seqno_lock);
spin_lock_init(&orig_node->neigh_list_lock);
kref_init(&orig_node->refcount);
@@ -213,6 +214,8 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
orig_node->hna_buff = NULL;
orig_node->bcast_seqno_state.seqno_reset = jiffies - 1
- msecs_to_jiffies(RESET_PROTECTION_MS);
+ orig_node->ucast_safe_seqno_state.seqno_reset = jiffies - 1
+ - msecs_to_jiffies(RESET_PROTECTION_MS);
orig_node->batman_seqno_reset = jiffies - 1
- msecs_to_jiffies(RESET_PROTECTION_MS);
@@ -1439,13 +1439,25 @@ int recv_ucast_safe_packet(struct sk_buff *skb, struct batman_if *recv_if)
struct unicast_packet_safe *unicast_packet;
struct orig_node *orig_node;
int hdr_size = sizeof(struct unicast_packet);
- int bonding_mode;
+ int ret, bonding_mode;
if (check_unicast_packet(skb, hdr_size) < 0)
return NET_RX_DROP;
unicast_packet = (struct unicast_packet_safe *)skb->data;
+ orig_node = hash_find_orig(bat_priv, unicast_packet->orig);
+ if (!orig_node)
+ return NET_RX_DROP;
+
+ ret = check_duplicate(bat_priv, ntohl(unicast_packet->seqno),
+ &orig_node->ucast_safe_seqno_state,
+ &orig_node->ucast_safe_seqno_lock);
+
+ kref_put(&orig_node->refcount, orig_node_free_ref);
+ if (ret == NET_RX_DROP)
+ return NET_RX_DROP;
+
/* packet for me */
if (is_my_mac(unicast_packet->dest)) {
unicast_safe_to_unicast(skb);
@@ -91,11 +91,13 @@ struct orig_node {
struct bat_priv *bat_priv;
unsigned long last_frag_packet;
struct seqno_state bcast_seqno_state;
+ struct seqno_state ucast_safe_seqno_state;
spinlock_t ogm_cnt_lock; /* protects: bcast_own, bcast_own_sum,
* neigh_node->real_bits,
* neigh_node->real_packet_count */
spinlock_t bcast_seqno_lock; /* protects bcast_bits,
* last_bcast_seqno */
+ spinlock_t ucast_safe_seqno_lock; /* protects ucast_safe_seqno_state */
atomic_t bond_candidates;
struct list_head bond_list;
};