summaryrefslogtreecommitdiffstats
path: root/net/batman-adv/translation-table.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/batman-adv/translation-table.c')
-rw-r--r--net/batman-adv/translation-table.c206
1 files changed, 176 insertions, 30 deletions
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index fb6931d00cd7..873fb3d8e56f 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -183,7 +183,8 @@ static int tt_local_init(struct bat_priv *bat_priv)
return 1;
}
-void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
+void tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
+ int ifindex)
{
struct bat_priv *bat_priv = netdev_priv(soft_iface);
struct tt_local_entry *tt_local_entry = NULL;
@@ -207,6 +208,8 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
memcpy(tt_local_entry->addr, addr, ETH_ALEN);
tt_local_entry->last_seen = jiffies;
tt_local_entry->flags = NO_FLAGS;
+ if (is_wifi_iface(ifindex))
+ tt_local_entry->flags |= TT_CLIENT_WIFI;
atomic_set(&tt_local_entry->refcount, 2);
/* the batman interface mac address should never be purged */
@@ -329,7 +332,7 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
rcu_read_lock();
__hlist_for_each_rcu(node, head)
- buf_size += 21;
+ buf_size += 29;
rcu_read_unlock();
}
@@ -348,8 +351,19 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
rcu_read_lock();
hlist_for_each_entry_rcu(tt_local_entry, node,
head, hash_entry) {
- pos += snprintf(buff + pos, 22, " * %pM\n",
- tt_local_entry->addr);
+ pos += snprintf(buff + pos, 30, " * %pM "
+ "[%c%c%c%c%c]\n",
+ tt_local_entry->addr,
+ (tt_local_entry->flags &
+ TT_CLIENT_ROAM ? 'R' : '.'),
+ (tt_local_entry->flags &
+ TT_CLIENT_NOPURGE ? 'P' : '.'),
+ (tt_local_entry->flags &
+ TT_CLIENT_NEW ? 'N' : '.'),
+ (tt_local_entry->flags &
+ TT_CLIENT_PENDING ? 'X' : '.'),
+ (tt_local_entry->flags &
+ TT_CLIENT_WIFI ? 'W' : '.'));
}
rcu_read_unlock();
}
@@ -369,8 +383,8 @@ static void tt_local_set_pending(struct bat_priv *bat_priv,
tt_local_event(bat_priv, tt_local_entry->addr,
tt_local_entry->flags | flags);
- /* The local client has to be merked as "pending to be removed" but has
- * to be kept in the table in order to send it in an full tables
+ /* The local client has to be marked as "pending to be removed" but has
+ * to be kept in the table in order to send it in a full table
* response issued before the net ttvn increment (consistency check) */
tt_local_entry->flags |= TT_CLIENT_PENDING;
}
@@ -495,7 +509,8 @@ static void tt_changes_list_free(struct bat_priv *bat_priv)
/* caller must hold orig_node refcount */
int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
- const unsigned char *tt_addr, uint8_t ttvn, bool roaming)
+ const unsigned char *tt_addr, uint8_t ttvn, bool roaming,
+ bool wifi)
{
struct tt_global_entry *tt_global_entry;
struct orig_node *orig_node_tmp;
@@ -537,6 +552,9 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
tt_global_entry->roam_at = 0;
}
+ if (wifi)
+ tt_global_entry->flags |= TT_CLIENT_WIFI;
+
bat_dbg(DBG_TT, bat_priv,
"Creating new global tt entry: %pM (via %pM)\n",
tt_global_entry->addr, orig_node->orig);
@@ -582,8 +600,8 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
seq_printf(seq,
"Globally announced TT entries received via the mesh %s\n",
net_dev->name);
- seq_printf(seq, " %-13s %s %-15s %s\n",
- "Client", "(TTVN)", "Originator", "(Curr TTVN)");
+ seq_printf(seq, " %-13s %s %-15s %s %s\n",
+ "Client", "(TTVN)", "Originator", "(Curr TTVN)", "Flags");
buf_size = 1;
/* Estimate length for: " * xx:xx:xx:xx:xx:xx (ttvn) via
@@ -593,7 +611,7 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
rcu_read_lock();
__hlist_for_each_rcu(node, head)
- buf_size += 59;
+ buf_size += 67;
rcu_read_unlock();
}
@@ -612,14 +630,20 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
rcu_read_lock();
hlist_for_each_entry_rcu(tt_global_entry, node,
head, hash_entry) {
- pos += snprintf(buff + pos, 61,
- " * %pM (%3u) via %pM (%3u)\n",
- tt_global_entry->addr,
+ pos += snprintf(buff + pos, 69,
+ " * %pM (%3u) via %pM (%3u) "
+ "[%c%c%c]\n", tt_global_entry->addr,
tt_global_entry->ttvn,
tt_global_entry->orig_node->orig,
(uint8_t) atomic_read(
&tt_global_entry->orig_node->
- last_ttvn));
+ last_ttvn),
+ (tt_global_entry->flags &
+ TT_CLIENT_ROAM ? 'R' : '.'),
+ (tt_global_entry->flags &
+ TT_CLIENT_PENDING ? 'X' : '.'),
+ (tt_global_entry->flags &
+ TT_CLIENT_WIFI ? 'W' : '.'));
}
rcu_read_unlock();
}
@@ -774,30 +798,56 @@ static void tt_global_table_free(struct bat_priv *bat_priv)
bat_priv->tt_global_hash = NULL;
}
+static bool _is_ap_isolated(struct tt_local_entry *tt_local_entry,
+ struct tt_global_entry *tt_global_entry)
+{
+ bool ret = false;
+
+ if (tt_local_entry->flags & TT_CLIENT_WIFI &&
+ tt_global_entry->flags & TT_CLIENT_WIFI)
+ ret = true;
+
+ return ret;
+}
+
struct orig_node *transtable_search(struct bat_priv *bat_priv,
- const uint8_t *addr)
+ const uint8_t *src, const uint8_t *addr)
{
- struct tt_global_entry *tt_global_entry;
+ struct tt_local_entry *tt_local_entry = NULL;
+ struct tt_global_entry *tt_global_entry = NULL;
struct orig_node *orig_node = NULL;
- tt_global_entry = tt_global_hash_find(bat_priv, addr);
+ if (src && atomic_read(&bat_priv->ap_isolation)) {
+ tt_local_entry = tt_local_hash_find(bat_priv, src);
+ if (!tt_local_entry)
+ goto out;
+ }
+ tt_global_entry = tt_global_hash_find(bat_priv, addr);
if (!tt_global_entry)
goto out;
+ /* check whether the clients should not communicate due to AP
+ * isolation */
+ if (tt_local_entry && _is_ap_isolated(tt_local_entry, tt_global_entry))
+ goto out;
+
if (!atomic_inc_not_zero(&tt_global_entry->orig_node->refcount))
- goto free_tt;
+ goto out;
/* A global client marked as PENDING has already moved from that
* originator */
if (tt_global_entry->flags & TT_CLIENT_PENDING)
- goto free_tt;
+ goto out;
orig_node = tt_global_entry->orig_node;
-free_tt:
- tt_global_entry_free_ref(tt_global_entry);
out:
+ if (tt_global_entry)
+ tt_global_entry_free_ref(tt_global_entry);
+ if (tt_local_entry)
+ tt_local_entry_free_ref(tt_local_entry);
+
return orig_node;
}
@@ -999,7 +1049,6 @@ static struct sk_buff *tt_response_fill_table(uint16_t tt_len, uint8_t ttvn,
tt_response = (struct tt_query_packet *)skb_put(skb,
tt_query_size + tt_len);
tt_response->ttvn = ttvn;
- tt_response->tt_data = htons(tt_tot);
tt_change = (struct tt_change *)(skb->data + tt_query_size);
tt_count = 0;
@@ -1025,12 +1074,17 @@ static struct sk_buff *tt_response_fill_table(uint16_t tt_len, uint8_t ttvn,
}
rcu_read_unlock();
+ /* store in the message the number of entries we have successfully
+ * copied */
+ tt_response->tt_data = htons(tt_count);
+
out:
return skb;
}
-int send_tt_request(struct bat_priv *bat_priv, struct orig_node *dst_orig_node,
- uint8_t ttvn, uint16_t tt_crc, bool full_table)
+static int send_tt_request(struct bat_priv *bat_priv,
+ struct orig_node *dst_orig_node,
+ uint8_t ttvn, uint16_t tt_crc, bool full_table)
{
struct sk_buff *skb = NULL;
struct tt_query_packet *tt_request;
@@ -1137,12 +1191,12 @@ static bool send_other_tt_response(struct bat_priv *bat_priv,
orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
req_ttvn = tt_request->ttvn;
- /* I have not the requested data */
+ /* I don't have the requested data */
if (orig_ttvn != req_ttvn ||
tt_request->tt_data != req_dst_orig_node->tt_crc)
goto out;
- /* If it has explicitly been requested the full table */
+ /* If the full table has been explicitly requested */
if (tt_request->flags & TT_FULL_TABLE ||
!req_dst_orig_node->tt_buff)
full_table = true;
@@ -1363,7 +1417,9 @@ static void _tt_update_changes(struct bat_priv *bat_priv,
(tt_change + i)->flags & TT_CLIENT_ROAM);
else
if (!tt_global_add(bat_priv, orig_node,
- (tt_change + i)->addr, ttvn, false))
+ (tt_change + i)->addr, ttvn, false,
+ (tt_change + i)->flags &
+ TT_CLIENT_WIFI))
/* In case of problem while storing a
* global_entry, we stop the updating
* procedure without committing the
@@ -1403,9 +1459,10 @@ out:
orig_node_free_ref(orig_node);
}
-void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
- uint16_t tt_num_changes, uint8_t ttvn,
- struct tt_change *tt_change)
+static void tt_update_changes(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ uint16_t tt_num_changes, uint8_t ttvn,
+ struct tt_change *tt_change)
{
_tt_update_changes(bat_priv, orig_node, tt_change, tt_num_changes,
ttvn);
@@ -1668,6 +1725,8 @@ static void tt_local_reset_flags(struct bat_priv *bat_priv, uint16_t flags)
rcu_read_lock();
hlist_for_each_entry_rcu(tt_local_entry, node,
head, hash_entry) {
+ if (!(tt_local_entry->flags & flags))
+ continue;
tt_local_entry->flags &= ~flags;
atomic_inc(&bat_priv->num_local_tt);
}
@@ -1720,3 +1779,90 @@ void tt_commit_changes(struct bat_priv *bat_priv)
atomic_inc(&bat_priv->ttvn);
bat_priv->tt_poss_change = false;
}
+
+bool is_ap_isolated(struct bat_priv *bat_priv, uint8_t *src, uint8_t *dst)
+{
+ struct tt_local_entry *tt_local_entry = NULL;
+ struct tt_global_entry *tt_global_entry = NULL;
+ bool ret = true;
+
+ if (!atomic_read(&bat_priv->ap_isolation))
+ return false;
+
+ tt_local_entry = tt_local_hash_find(bat_priv, dst);
+ if (!tt_local_entry)
+ goto out;
+
+ tt_global_entry = tt_global_hash_find(bat_priv, src);
+ if (!tt_global_entry)
+ goto out;
+
+ if (_is_ap_isolated(tt_local_entry, tt_global_entry))
+ goto out;
+
+ ret = false;
+
+out:
+ if (tt_global_entry)
+ tt_global_entry_free_ref(tt_global_entry);
+ if (tt_local_entry)
+ tt_local_entry_free_ref(tt_local_entry);
+ return ret;
+}
+
+void tt_update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ const unsigned char *tt_buff, uint8_t tt_num_changes,
+ uint8_t ttvn, uint16_t tt_crc)
+{
+ uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
+ bool full_table = true;
+
+ /* the ttvn increased by one -> we can apply the attached changes */
+ if (ttvn - orig_ttvn == 1) {
+ /* the OGM could not contain the changes due to their size or
+ * because they have already been sent TT_OGM_APPEND_MAX times.
+ * In this case send a tt request */
+ if (!tt_num_changes) {
+ full_table = false;
+ goto request_table;
+ }
+
+ tt_update_changes(bat_priv, orig_node, tt_num_changes, ttvn,
+ (struct tt_change *)tt_buff);
+
+ /* Even if we received the precomputed crc with the OGM, we
+ * prefer 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 represent 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;
+ } else {
+ /* if we missed more than one change or our tables are not
+ * in sync anymore -> request fresh tt data */
+ if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
+request_table:
+ bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
+ "Need to retrieve the correct information "
+ "(ttvn: %u last_ttvn: %u crc: %u last_crc: "
+ "%u num_changes: %u)\n", orig_node->orig, ttvn,
+ orig_ttvn, tt_crc, orig_node->tt_crc,
+ tt_num_changes);
+ send_tt_request(bat_priv, orig_node, ttvn, tt_crc,
+ full_table);
+ return;
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 00:48:35 +0100