- 根目录:
- net
- batman-adv
- soft-interface.c
/*
* Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
*
* Marek Lindner, Simon Wunderlich
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*
*/
#include "main.h"
#include "soft-interface.h"
#include "hard-interface.h"
#include "routing.h"
#include "send.h"
#include "bat_debugfs.h"
#include "translation-table.h"
#include "hash.h"
#include "gateway_common.h"
#include "gateway_client.h"
#include "bat_sysfs.h"
#include "originator.h"
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include "unicast.h"
static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
static void bat_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info);
static u32 bat_get_msglevel(struct net_device *dev);
static void bat_set_msglevel(struct net_device *dev, u32 value);
static u32 bat_get_link(struct net_device *dev);
static const struct ethtool_ops bat_ethtool_ops = {
.get_settings = bat_get_settings,
.get_drvinfo = bat_get_drvinfo,
.get_msglevel = bat_get_msglevel,
.set_msglevel = bat_set_msglevel,
.get_link = bat_get_link,
};
int my_skb_head_push(struct sk_buff *skb, unsigned int len)
{
int result;
/**
* TODO: We must check if we can release all references to non-payload
* data using skb_header_release in our skbs to allow skb_cow_header to
* work optimally. This means that those skbs are not allowed to read
* or write any data which is before the current position of skb->data
* after that call and thus allow other skbs with the same data buffer
* to write freely in that area.
*/
result = skb_cow_head(skb, len);
if (result < 0)
return result;
skb_push(skb, len);
return 0;
}
static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
{
if (atomic_dec_and_test(&softif_neigh->refcount))
kfree_rcu(softif_neigh, rcu);
}
static void softif_neigh_vid_free_rcu(struct rcu_head *rcu)
{
struct softif_neigh_vid *softif_neigh_vid;
struct softif_neigh *softif_neigh;
struct hlist_node *node, *node_tmp;
struct bat_priv *bat_priv;
softif_neigh_vid = container_of(rcu, struct softif_neigh_vid, rcu);
bat_priv = softif_neigh_vid->bat_priv;
spin_lock_bh(&bat_priv->softif_neigh_lock);
hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
&softif_neigh_vid->softif_neigh_list, list) {
hlist_del_rcu(&softif_neigh->list);
softif_neigh_free_ref(softif_neigh);
}
spin_unlock_bh(&bat_priv->softif_neigh_lock);
kfree(softif_neigh_vid);
}
static void softif_neigh_vid_free_ref(struct softif_neigh_vid *softif_neigh_vid)
{
if (atomic_dec_and_test(&softif_neigh_vid->refcount))
call_rcu(&softif_neigh_vid->rcu, softif_neigh_vid_free_rcu);
}
static struct softif_neigh_vid *softif_neigh_vid_get(struct bat_priv *bat_priv,
short vid)
{
struct softif_neigh_vid *softif_neigh_vid;
struct hlist_node *node;
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh_vid, node,
&bat_priv->softif_neigh_vids, list) {
if (softif_neigh_vid->vid != vid)
continue;
if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
continue;
goto out;
}
softif_neigh_vid = kzalloc(sizeof(*softif_neigh_vid), GFP_ATOMIC);
if (!softif_neigh_vid)
goto out;
softif_neigh_vid->vid = vid;
softif_neigh_vid->bat_priv = bat_priv;
/* initialize with 2 - caller decrements counter by one */
atomic_set(&softif_neigh_vid->refcount, 2);
INIT_HLIST_HEAD(&softif_neigh_vid->softif_neigh_list);
INIT_HLIST_NODE(&softif_neigh_vid->list);
spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
hlist_add_head_rcu(&softif_neigh_vid->list,
&bat_priv->softif_neigh_vids);
spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
out:
rcu_read_unlock();
return softif_neigh_vid;
}
static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
const uint8_t *addr, short vid)
{
struct softif_neigh_vid *softif_neigh_vid;
struct softif_neigh *softif_neigh = NULL;
struct hlist_node *node;
softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
if (!softif_neigh_vid)
goto out;
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh, node,
&softif_neigh_vid->softif_neigh_list,
list) {
if (!compare_eth(softif_neigh->addr, addr))
continue;
if (!atomic_inc_not_zero(&softif_neigh->refcount))
continue;
softif_neigh->last_seen = jiffies;
goto unlock;
}
softif_neigh = kzalloc(sizeof(*softif_neigh), GFP_ATOMIC);
if (!softif_neigh)
goto unlock;
memcpy(softif_neigh->addr, addr, ETH_ALEN);
softif_neigh->last_seen = jiffies;
/* initialize with 2 - caller decrements counter by one */
atomic_set(&softif_neigh->refcount, 2);
INIT_HLIST_NODE(&softif_neigh->list);
spin_lock_bh(&bat_priv->softif_neigh_lock);
hlist_add_head_rcu(&softif_neigh->list,
&softif_neigh_vid->softif_neigh_list);
spin_unlock_bh(&bat_priv->softif_neigh_lock);
unlock:
rcu_read_unlock();
out:
if (softif_neigh_vid)
softif_neigh_vid_free_ref(softif_neigh_vid);
return softif_neigh;
}
static struct softif_neigh *softif_neigh_get_selected(
struct softif_neigh_vid *softif_neigh_vid)
{
struct softif_neigh *softif_neigh;
rcu_read_lock();
softif_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
if (softif_neigh && !atomic_inc_not_zero(&softif_neigh->refcount))
softif_neigh = NULL;
rcu_read_unlock();
return softif_neigh;
}
static struct softif_neigh *softif_neigh_vid_get_selected(
struct bat_priv *bat_priv,
short vid)
{
struct softif_neigh_vid *softif_neigh_vid;
struct softif_neigh *softif_neigh = NULL;
softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
if (!softif_neigh_vid)
goto out;
softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
out:
if (softif_neigh_vid)
softif_neigh_vid_free_ref(softif_neigh_vid);
return softif_neigh;
}
static void softif_neigh_vid_select(struct bat_priv *bat_priv,
struct softif_neigh *new_neigh,
short vid)
{
struct softif_neigh_vid *softif_neigh_vid;
struct softif_neigh *curr_neigh;
softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
if (!softif_neigh_vid)
goto out;
spin_lock_bh(&bat_priv->softif_neigh_lock);
if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
new_neigh = NULL;
curr_neigh = rcu_dereference_protected(softif_neigh_vid->softif_neigh,
1);
rcu_assign_pointer(softif_neigh_vid->softif_neigh, new_neigh);
if ((curr_neigh) && (!new_neigh))
bat_dbg(DBG_ROUTES, bat_priv,
"Removing mesh exit point on vid: %d (prev: %pM).\n",
vid, curr_neigh->addr);
else if ((curr_neigh) && (new_neigh))
bat_dbg(DBG_ROUTES, bat_priv,
"Changing mesh exit point on vid: %d from %pM "
"to %pM.\n", vid, curr_neigh->addr, new_neigh->addr);
else if ((!curr_neigh) && (new_neigh))
bat_dbg(DBG_ROUTES, bat_priv,
"Setting mesh exit point on vid: %d to %pM.\n",
vid, new_neigh->addr);
if (curr_neigh)
softif_neigh_free_ref(curr_neigh);
spin_unlock_bh(&bat_priv->softif_neigh_lock);
out:
if (softif_neigh_vid)
softif_neigh_vid_free_ref(softif_neigh_vid);
}
static void softif_neigh_vid_deselect(struct bat_priv *bat_priv,
struct softif_neigh_vid *softif_neigh_vid)
{
struct softif_neigh *curr_neigh;
struct softif_neigh *softif_neigh = NULL, *softif_neigh_tmp;
struct hard_iface *primary_if = NULL;
struct hlist_node *node;
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
/* find new softif_neigh immediately to avoid temporary loops */
rcu_read_lock();
curr_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
hlist_for_each_entry_rcu(softif_neigh_tmp, node,
&softif_neigh_vid->softif_neigh_list,
list) {
if (softif_neigh_tmp == curr_neigh)
continue;
/* we got a neighbor but its mac is 'bigger' than ours */
if (memcmp(primary_if->net_dev->dev_addr,
softif_neigh_tmp->addr, ETH_ALEN) < 0)
continue;
if (!atomic_inc_not_zero(&softif_neigh_tmp->refcount))
continue;
softif_neigh = softif_neigh_tmp;
goto unlock;
}
unlock:
rcu_read_unlock();
out:
softif_neigh_vid_select(bat_priv, softif_neigh, softif_neigh_vid->vid);
if (primary_if)
hardif_free_ref(primary_if);
if (softif_neigh)
softif_neigh_free_ref(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_vid *softif_neigh_vid;
struct softif_neigh *softif_neigh;
struct hard_iface *primary_if;
struct hlist_node *node, *node_tmp;
struct softif_neigh *curr_softif_neigh;
int ret = 0, last_seen_secs, last_seen_msecs;
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if) {
ret = seq_printf(seq, "BATMAN mesh %s disabled - "
"please specify interfaces to enable it\n",
net_dev->name);
goto out;
}
if (primary_if->if_status != IF_ACTIVE) {
ret = seq_printf(seq, "BATMAN mesh %s "
"disabled - primary interface not active\n",
net_dev->name);
goto out;
}
seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh_vid, node,
&bat_priv->softif_neigh_vids, list) {
seq_printf(seq, " %-15s %s on vid: %d\n",
"Originator", "last-seen", softif_neigh_vid->vid);
curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
hlist_for_each_entry_rcu(softif_neigh, node_tmp,
&softif_neigh_vid->softif_neigh_list,
list) {
last_seen_secs = jiffies_to_msecs(jiffies -
softif_neigh->last_seen) / 1000;
last_seen_msecs = jiffies_to_msecs(jiffies -
softif_neigh->last_seen) % 1000;
seq_printf(seq, "%s %pM %3i.%03is\n",
curr_softif_neigh == softif_neigh
? "=>" : " ", softif_neigh->addr,
last_seen_secs, last_seen_msecs);
}
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
seq_printf(seq, "\n");
}
rcu_read_unlock();
out:
if (primary_if)
hardif_free_ref(primary_if);
return ret;
}
void softif_neigh_purge(struct bat_priv *bat_priv)
{
struct softif_neigh *softif_neigh, *curr_softif_neigh;
struct softif_neigh_vid *softif_neigh_vid;
struct hlist_node *node, *node_tmp, *node_tmp2;
int do_deselect;
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh_vid, node,
&bat_priv->softif_neigh_vids, list) {
if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
continue;
curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
do_deselect = 0;
spin_lock_bh(&bat_priv->softif_neigh_lock);
hlist_for_each_entry_safe(softif_neigh, node_tmp, node_tmp2,
&softif_neigh_vid->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;
if (curr_softif_neigh == softif_neigh) {
bat_dbg(DBG_ROUTES, bat_priv,
"Current mesh exit point on vid: %d "
"'%pM' vanished.\n",
softif_neigh_vid->vid,
softif_neigh->addr);
do_deselect = 1;
}
hlist_del_rcu(&softif_neigh->list);
softif_neigh_free_ref(softif_neigh);
}
spin_unlock_bh(&bat_priv->softif_neigh_lock);
/* soft_neigh_vid_deselect() needs to acquire the
* softif_neigh_lock */
if (do_deselect)
softif_neigh_vid_deselect(bat_priv, softif_neigh_vid);
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
softif_neigh_vid_free_ref(softif_neigh_vid);
}
rcu_read_unlock();
spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
hlist_for_each_entry_safe(softif_neigh_vid, node, node_tmp,
&bat_priv->softif_neigh_vids, list) {
if (!hlist_empty(&softif_neigh_vid->softif_neigh_list))
continue;
hlist_del_rcu(&softif_neigh_vid->list);
softif_neigh_vid_free_ref(softif_neigh_vid);
}
spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
}
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_ogm_packet *batman_ogm_packet;
struct softif_neigh *softif_neigh = NULL;
struct hard_iface *primary_if = NULL;
struct softif_neigh *curr_softif_neigh = NULL;
if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
batman_ogm_packet = (struct batman_ogm_packet *)
(skb->data + ETH_HLEN + VLAN_HLEN);
else
batman_ogm_packet = (struct batman_ogm_packet *)
(skb->data + ETH_HLEN);
if (batman_ogm_packet->version != COMPAT_VERSION)
goto out;
if (batman_ogm_packet->packet_type != BAT_OGM)
goto out;
if (!(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
goto out;
if (is_my_mac(batman_ogm_packet->orig))
goto out;
softif_neigh = softif_neigh_get(bat_priv, batman_ogm_packet->orig, vid);
if (!softif_neigh)
goto out;
curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
if (curr_softif_neigh == softif_neigh)
goto out;
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
/* we got a neighbor but its mac is 'bigger' than ours */
if (memcmp(primary_if->net_dev->dev_addr,
softif_neigh->addr, ETH_ALEN) < 0)
goto out;
/* close own batX device and use softif_neigh as exit node */
if (!curr_softif_neigh) {
softif_neigh_vid_select(bat_priv, softif_neigh, vid);
goto out;
}
/* switch to new 'smallest neighbor' */
if (memcmp(softif_neigh->addr, curr_softif_neigh->addr, ETH_ALEN) < 0)
softif_neigh_vid_select(bat_priv, softif_neigh, vid);
out:
kfree_skb(skb);
if (softif_neigh)
softif_neigh_free_ref(softif_neigh);
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
if (primary_if)
hardif_free_ref(primary_if);
return;
}
static int interface_open(struct net_device *dev)
{
netif_start_queue(dev);
return 0;
}
static int interface_release(struct net_device *dev)
{
netif_stop_queue(dev);
return 0;
}
static struct net_device_stats *interface_stats(struct net_device *dev)
{
struct bat_priv *bat_priv = netdev_priv(dev);
return &bat_priv->stats;
}
static int interface_set_mac_addr(struct net_device *dev, void *p)
{
struct bat_priv *bat_priv = netdev_priv(dev);
struct sockaddr *addr = p;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
/* only modify transtable if it has been initialized before */
if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
tt_local_remove(bat_priv, dev->dev_addr,
"mac address changed", false);
tt_local_add(dev, addr->sa_data, NULL_IFINDEX);
}
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
return 0;
}
static int interface_change_mtu(struct net_device *dev, int new_mtu)
{
/* check ranges */
if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
return -EINVAL;
dev->mtu = new_mtu;
return 0;
}
static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct bat_priv *bat_priv = netdev_priv(soft_iface);
struct hard_iface *primary_if = NULL;
struct bcast_packet *bcast_packet;
struct vlan_ethhdr *vhdr;
struct softif_neigh *curr_softif_neigh = NULL;
unsigned int header_len = 0;
int data_len = skb->len, ret;
short vid = -1;
bool do_bcast = false;
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
*/
curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
if (curr_softif_neigh)
goto dropped;
/* Register the client MAC in the transtable */
tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif);
if (is_multicast_ether_addr(ethhdr->h_dest)) {
do_bcast = true;
switch (atomic_read(&bat_priv->gw_mode)) {
case GW_MODE_SERVER:
/* gateway servers should not send dhcp
* requests into the mesh */
ret = gw_is_dhcp_target(skb, &header_len);
if (ret)
goto dropped;
break;
case GW_MODE_CLIENT:
/* gateway clients should send dhcp requests
* via unicast to their gateway */
ret = gw_is_dhcp_target(skb, &header_len);
if (ret)
do_bcast = false;
break;
case GW_MODE_OFF:
default:
break;
}
}
/* ethernet packet should be broadcasted */
if (do_bcast) {
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto dropped;
if (my_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
goto dropped;
bcast_packet = (struct bcast_packet *)skb->data;
bcast_packet->version = COMPAT_VERSION;
bcast_packet->ttl = TTL;
/* batman packet type: broadcast */
bcast_packet->packet_type = BAT_BCAST;
/* hw address of first interface is the orig mac because only
* this mac is known throughout the mesh */
memcpy(bcast_packet->orig,
primary_if->net_dev->dev_addr, ETH_ALEN);
/* set broadcast sequence number */
bcast_packet->seqno =
htonl(atomic_inc_return(&bat_priv->bcast_seqno));
add_bcast_packet_to_list(bat_priv, skb, 1);
/* a copy is stored in the bcast list, therefore removing
* the original skb. */
kfree_skb(skb);
/* unicast packet */
} else {
if (atomic_read(&bat_priv->gw_mode) != GW_MODE_OFF) {
ret = gw_out_of_range(bat_priv, skb, ethhdr);
if (ret)
goto dropped;
}
ret = unicast_send_skb(skb, bat_priv);
if (ret != 0)
goto dropped_freed;
}
bat_priv->stats.tx_packets++;
bat_priv->stats.tx_bytes += data_len;
goto end;
dropped:
kfree_skb(skb);
dropped_freed:
bat_priv->stats.tx_dropped++;
end:
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
if (primary_if)
hardif_free_ref(primary_if);
return NETDEV_TX_OK;
}
void interface_rx(struct net_device *soft_iface,
struct sk_buff *skb, struct hard_iface *recv_if,
int hdr_size)
{
struct bat_priv *bat_priv = netdev_priv(soft_iface);
struct unicast_packet *unicast_packet;
struct ethhdr *ethhdr;
struct vlan_ethhdr *vhdr;
struct softif_neigh *curr_softif_neigh = NULL;
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_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
*/
curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
if (curr_softif_neigh) {
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,
curr_softif_neigh->addr, ETH_ALEN);
ret = route_unicast_packet(skb, recv_if);
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)))
goto dropped;
skb->protocol = eth_type_trans(skb, soft_iface);
/* should not be necessary anymore as we use skb_pull_rcsum()
* TODO: please verify this and remove this TODO
* -- Dec 21st 2009, Simon Wunderlich */
/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
bat_priv->stats.rx_packets++;
bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
soft_iface->last_rx = jiffies;
if (is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest))
goto dropped;
netif_rx(skb);
goto out;
dropped:
kfree_skb(skb);
out:
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
return;
}
static const struct net_device_ops bat_netdev_ops = {
.ndo_open = interface_open,
.ndo_stop = interface_release,
.ndo_get_stats = interface_stats,
.ndo_set_mac_address = interface_set_mac_addr,
.ndo_change_mtu = interface_change_mtu,
.ndo_start_xmit = interface_tx,
.ndo_validate_addr = eth_validate_addr
};
static void interface_setup(struct net_device *dev)
{
struct bat_priv *priv = netdev_priv(dev);
char dev_addr[ETH_ALEN];
ether_setup(dev);
dev->netdev_ops = &bat_netdev_ops;
dev->destructor = free_netdev;
dev->tx_queue_len = 0;
/**
* can't call min_mtu, because the needed variables
* have not been initialized yet
*/
dev->mtu = ETH_DATA_LEN;
/* reserve more space in the skbuff for our header */
dev->hard_header_len = BAT_HEADER_LEN;
/* generate random address */
random_ether_addr(dev_addr);
memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
memset(priv, 0, sizeof(*priv));
}
struct net_device *softif_create(const char *name)
{
struct net_device *soft_iface;
struct bat_priv *bat_priv;
int ret;
soft_iface = alloc_netdev(sizeof(*bat_priv), name, interface_setup);
if (!soft_iface)
goto out;
ret = register_netdevice(soft_iface);
if (ret < 0) {
pr_err("Unable to register the batman interface '%s': %i\n",
name, ret);
goto free_soft_iface;
}
bat_priv = netdev_priv(soft_iface);
atomic_set(&bat_priv->aggregated_ogms, 1);
atomic_set(&bat_priv->bonding, 0);
atomic_set(&bat_priv->ap_isolation, 0);
atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
atomic_set(&bat_priv->gw_sel_class, 20);
atomic_set(&bat_priv->gw_bandwidth, 41);
atomic_set(&bat_priv->orig_interval, 1000);
atomic_set(&bat_priv->hop_penalty, 10);
atomic_set(&bat_priv->log_level, 0);
atomic_set(&bat_priv->fragmentation, 1);
atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
atomic_set(&bat_priv->bcast_seqno, 1);
atomic_set(&bat_priv->ttvn, 0);
atomic_set(&bat_priv->tt_local_changes, 0);
atomic_set(&bat_priv->tt_ogm_append_cnt, 0);
bat_priv->tt_buff = NULL;
bat_priv->tt_buff_len = 0;
bat_priv->tt_poss_change = false;
bat_priv->primary_if = NULL;
bat_priv->num_ifaces = 0;
ret = sysfs_add_meshif(soft_iface);
if (ret < 0)
goto unreg_soft_iface;
ret = debugfs_add_meshif(soft_iface);
if (ret < 0)
goto unreg_sysfs;
ret = mesh_init(soft_iface);
if (ret < 0)
goto unreg_debugfs;
return soft_iface;
unreg_debugfs:
debugfs_del_meshif(soft_iface);
unreg_sysfs:
sysfs_del_meshif(soft_iface);
unreg_soft_iface:
unregister_netdevice(soft_iface);
return NULL;
free_soft_iface:
free_netdev(soft_iface);
out:
return NULL;
}
void softif_destroy(struct net_device *soft_iface)
{
debugfs_del_meshif(soft_iface);
sysfs_del_meshif(soft_iface);
mesh_free(soft_iface);
unregister_netdevice(soft_iface);
}
int softif_is_valid(const struct net_device *net_dev)
{
if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
return 1;
return 0;
}
/* ethtool */
static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
cmd->supported = 0;
cmd->advertising = 0;
ethtool_cmd_speed_set(cmd, SPEED_10);
cmd->duplex = DUPLEX_FULL;
cmd->port = PORT_TP;
cmd->phy_address = 0;
cmd->transceiver = XCVR_INTERNAL;
cmd->autoneg = AUTONEG_DISABLE;
cmd->maxtxpkt = 0;
cmd->maxrxpkt = 0;
return 0;
}
static void bat_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strcpy(info->driver, "B.A.T.M.A.N. advanced");
strcpy(info->version, SOURCE_VERSION);
strcpy(info->fw_version, "N/A");
strcpy(info->bus_info, "batman");
}
static u32 bat_get_msglevel(struct net_device *dev)
{
return -EOPNOTSUPP;
}
static void bat_set_msglevel(struct net_device *dev, u32 value)
{
}
static u32 bat_get_link(struct net_device *dev)
{
return 1;
}