#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
#include "unicast.h"
+#include "routing.h"
static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
return 0;
}
+static void softif_neigh_free_ref(struct kref *refcount)
+{
+ struct softif_neigh *softif_neigh;
+
+ softif_neigh = container_of(refcount, struct softif_neigh, refcount);
+ kfree(softif_neigh);
+}
+
+static void softif_neigh_free_rcu(struct rcu_head *rcu)
+{
+ struct softif_neigh *softif_neigh;
+
+ softif_neigh = container_of(rcu, struct softif_neigh, rcu);
+ kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
+}
+
+void softif_neigh_purge(struct bat_priv *bat_priv)
+{
+ struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+ struct hlist_node *node, *node_tmp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bat_priv->softif_neigh_lock, flags);
+
+ hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
+ &bat_priv->softif_neigh_list, list) {
+
+ if ((!time_after(jiffies, softif_neigh->last_seen +
+ msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
+ (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
+ continue;
+
+ hlist_del_rcu(&softif_neigh->list);
+
+ if (bat_priv->softif_neigh == softif_neigh) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Current mesh exit point '%pM' vanished "
+ "(vid: %d).\n",
+ softif_neigh->addr, softif_neigh->vid);
+ softif_neigh_tmp = bat_priv->softif_neigh;
+ bat_priv->softif_neigh = NULL;
+ kref_put(&softif_neigh_tmp->refcount,
+ softif_neigh_free_ref);
+ }
+
+ call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
+ }
+
+ spin_unlock_irqrestore(&bat_priv->softif_neigh_lock, flags);
+}
+
+static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
+ uint8_t *addr, short vid)
+{
+ struct softif_neigh *softif_neigh;
+ struct hlist_node *node;
+ unsigned long flags;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh, node,
+ &bat_priv->softif_neigh_list, list) {
+ if (memcmp(softif_neigh->addr, addr, ETH_ALEN) != 0)
+ continue;
+
+ if (softif_neigh->vid != vid)
+ continue;
+
+ softif_neigh->last_seen = jiffies;
+ goto found;
+ }
+
+ softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
+ if (!softif_neigh)
+ goto out;
+
+ memcpy(softif_neigh->addr, addr, ETH_ALEN);
+ softif_neigh->vid = vid;
+ softif_neigh->last_seen = jiffies;
+ kref_init(&softif_neigh->refcount);
+
+ INIT_HLIST_NODE(&softif_neigh->list);
+ spin_lock_irqsave(&bat_priv->softif_neigh_lock, flags);
+ hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
+ spin_unlock_irqrestore(&bat_priv->softif_neigh_lock, flags);
+
+found:
+ kref_get(&softif_neigh->refcount);
+out:
+ rcu_read_unlock();
+ return softif_neigh;
+}
+
+int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
+{
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct softif_neigh *softif_neigh;
+ struct hlist_node *node;
+ size_t buf_size, pos;
+ char *buff;
+
+ if (!bat_priv->primary_if) {
+ return seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+ }
+
+ seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
+
+ buf_size = 1;
+ /* Estimate length for: " xx:xx:xx:xx:xx:xx\n" */
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh, node,
+ &bat_priv->softif_neigh_list, list)
+ buf_size += 30;
+ rcu_read_unlock();
+
+ buff = kmalloc(buf_size, GFP_ATOMIC);
+ if (!buff)
+ return -ENOMEM;
+
+ buff[0] = '\0';
+ pos = 0;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh, node,
+ &bat_priv->softif_neigh_list, list) {
+ pos += snprintf(buff + pos, 31, "%s %pM (vid: %d)\n",
+ bat_priv->softif_neigh == softif_neigh
+ ? "=>" : " ", softif_neigh->addr,
+ softif_neigh->vid);
+ }
+ rcu_read_unlock();
+
+ seq_printf(seq, "%s", buff);
+ kfree(buff);
+ return 0;
+}
+
+static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
+ short vid)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
+ struct batman_packet *batman_packet;
+ struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+
+ if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
+ batman_packet = (struct batman_packet *)
+ (skb->data + ETH_HLEN + VLAN_HLEN);
+ else
+ batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
+
+ if (batman_packet->version != COMPAT_VERSION)
+ goto err;
+
+ if (batman_packet->packet_type != BAT_PACKET)
+ goto err;
+
+ if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
+ goto err;
+
+ if (is_my_mac(batman_packet->orig))
+ goto err;
+
+ softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
+
+ if (!softif_neigh)
+ goto err;
+
+ if (bat_priv->softif_neigh == softif_neigh)
+ goto out;
+
+ /* we got a neighbor but its mac is 'bigger' than ours */
+ if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
+ softif_neigh->addr, ETH_ALEN) < 0)
+ goto out;
+
+ /* switch to new 'smallest neighbor' */
+ if ((bat_priv->softif_neigh) &&
+ (memcmp(softif_neigh->addr, bat_priv->softif_neigh->addr,
+ ETH_ALEN) < 0)) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Changing mesh exit point from %pM (vid: %d) "
+ "to %pM (vid: %d).\n",
+ bat_priv->softif_neigh->addr,
+ bat_priv->softif_neigh->vid,
+ softif_neigh->addr, softif_neigh->vid);
+ softif_neigh_tmp = bat_priv->softif_neigh;
+ bat_priv->softif_neigh = softif_neigh;
+ kref_put(&softif_neigh_tmp->refcount, softif_neigh_free_ref);
+ /* we need to hold the additional reference */
+ goto err;
+ }
+
+ /* close own batX device and use softif_neigh as exit node */
+ if ((!bat_priv->softif_neigh) &&
+ (memcmp(softif_neigh->addr,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Setting mesh exit point to %pM (vid: %d).\n",
+ softif_neigh->addr, softif_neigh->vid);
+ bat_priv->softif_neigh = softif_neigh;
+ /* we need to hold the additional reference */
+ goto err;
+ }
+
+out:
+ kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
+err:
+ kfree_skb(skb);
+ return;
+}
+
static int interface_open(struct net_device *dev)
{
netif_start_queue(dev);
}
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
-
return 0;
}
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct bat_priv *bat_priv = netdev_priv(soft_iface);
struct bcast_packet *bcast_packet;
+ struct vlan_ethhdr *vhdr;
int data_len = skb->len, ret;
+ short vid = -1;
if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
goto dropped;
soft_iface->trans_start = jiffies;
+ switch (ntohs(ethhdr->h_proto)) {
+ case ETH_P_8021Q:
+ vhdr = (struct vlan_ethhdr *)skb->data;
+ vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
+
+ if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
+ break;
+
+ /* fall through */
+ case ETH_P_BATMAN:
+ softif_batman_recv(skb, soft_iface, vid);
+ goto end;
+ }
+
+ /**
+ * if we have a another chosen mesh exit node in range
+ * it will transport the packets to the mesh
+ */
+ if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid))
+ goto dropped;
+
/* TODO: check this for locks */
hna_local_add(soft_iface, ethhdr->h_source);
}
void interface_rx(struct net_device *soft_iface,
- struct sk_buff *skb, int hdr_size)
+ struct sk_buff *skb, struct batman_if *recv_if,
+ int hdr_size)
{
- struct bat_priv *priv = netdev_priv(soft_iface);
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+ struct unicast_packet *unicast_packet;
+ struct ethhdr *ethhdr;
+ struct vlan_ethhdr *vhdr;
+ short vid = -1;
+ int ret;
/* check if enough space is available for pulling, and pull */
if (!pskb_may_pull(skb, hdr_size))
goto dropped;
skb_pull_rcsum(skb, hdr_size);
-/* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/
+ skb_reset_mac_header(skb);
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ switch (ntohs(ethhdr->h_proto)) {
+ case ETH_P_8021Q:
+ vhdr = (struct vlan_ethhdr *)skb->data;
+ vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
+
+ if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
+ break;
+
+ /* fall through */
+ case ETH_P_BATMAN:
+ goto dropped;
+ }
+
+ /**
+ * if we have a another chosen mesh exit node in range
+ * it will transport the packets to the non-mesh network
+ */
+ if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid)) {
+ skb_push(skb, hdr_size);
+ unicast_packet = (struct unicast_packet *)skb->data;
+
+ if ((unicast_packet->packet_type != BAT_UNICAST) &&
+ (unicast_packet->packet_type != BAT_UNICAST_FRAG))
+ goto dropped;
+
+ skb_reset_mac_header(skb);
+
+ memcpy(unicast_packet->dest,
+ bat_priv->softif_neigh->addr, ETH_ALEN);
+ ret = route_unicast_packet(skb, recv_if, hdr_size);
+ if (ret == NET_RX_DROP)
+ goto dropped;
+
+ goto out;
+ }
/* skb->dev & skb->pkt_type are set here */
if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
- priv->stats.rx_packets++;
- priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
+ bat_priv->stats.rx_packets++;
+ bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
soft_iface->last_rx = jiffies;
dropped:
kfree_skb(skb);
+out:
return;
}
bat_priv->primary_if = NULL;
bat_priv->num_ifaces = 0;
+ bat_priv->softif_neigh = NULL;
ret = sysfs_add_meshif(soft_iface);
if (ret < 0)
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff