/*
* Copyright (C) 2007-2010 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 "types.h"
#include "hash.h"
#include "send.h"
#include "bat_sysfs.h"
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.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 u32 bat_get_rx_csum(struct net_device *dev);
static int bat_set_rx_csum(struct net_device *dev, u32 data);
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,
.get_rx_csum = bat_get_rx_csum,
.set_rx_csum = bat_set_rx_csum
};
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 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 hna-table if it has been initialised before */
if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
hna_local_remove(bat_priv, dev->dev_addr,
"mac address changed");
hna_local_add(dev, addr->sa_data);
}
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;
}
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 bcast_packet *bcast_packet;
int data_len = skb->len, ret;
if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
goto dropped;
soft_iface->trans_start = jiffies;
/* TODO: check this for locks */
hna_local_add(soft_iface, ethhdr->h_source);
/* ethernet packet should be broadcasted */
if (is_bcast(ethhdr->h_dest) || is_mcast(ethhdr->h_dest)) {
if (!bat_priv->primary_if)
goto dropped;
if (my_skb_head_push(skb, sizeof(struct 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,
bat_priv->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);
/* a copy is stored in the bcast list, therefore removing
* the original skb. */
kfree_skb(skb);
/* unicast packet */
} else {
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:
return NETDEV_TX_OK;
}
void interface_rx(struct net_device *soft_iface,
struct sk_buff *skb, int hdr_size)
{
struct bat_priv *priv = netdev_priv(soft_iface);
/* check if enough space is available for pulling, and pull */
if (!pskb_may_pull(skb, hdr_size)) {
kfree_skb(skb);
return;
}
skb_pull_rcsum(skb, hdr_size);
/* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/
/* skb->dev & skb->pkt_type are set here */
skb->protocol = eth_type_trans(skb, soft_iface);
/* should not be neccesary 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;*/
priv->stats.rx_packets++;
priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
soft_iface->last_rx = jiffies;
netif_rx(skb);
}
#ifdef HAVE_NET_DEVICE_OPS
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
};
#endif
static void interface_setup(struct net_device *dev)
{
struct bat_priv *priv = netdev_priv(dev);
char dev_addr[ETH_ALEN];
ether_setup(dev);
#ifdef HAVE_NET_DEVICE_OPS
dev->netdev_ops = &bat_netdev_ops;
#else
dev->open = interface_open;
dev->stop = interface_release;
dev->get_stats = interface_stats;
dev->set_mac_address = interface_set_mac_addr;
dev->change_mtu = interface_change_mtu;
dev->hard_start_xmit = interface_tx;
#endif
dev->destructor = free_netdev;
/**
* can't call min_mtu, because the needed variables
* have not been initialized yet
*/
dev->mtu = ETH_DATA_LEN;
dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
* skbuff for our header */
/* 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(struct bat_priv));
}
struct net_device *softif_create(char *name)
{
struct net_device *soft_iface;
struct bat_priv *bat_priv;
int ret;
soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
interface_setup);
if (!soft_iface) {
pr_err("Unable to allocate the batman interface: %s\n", name);
goto out;
}
ret = register_netdev(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->aggregation_enabled, 1);
atomic_set(&bat_priv->bonding_enabled, 0);
atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
atomic_set(&bat_priv->orig_interval, 1000);
atomic_set(&bat_priv->log_level, 0);
atomic_set(&bat_priv->frag_enabled, 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->hna_local_changed, 0);
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_netdev(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);
}
/* ethtool */
static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
cmd->supported = 0;
cmd->advertising = 0;
cmd->speed = 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;
}
static u32 bat_get_rx_csum(struct net_device *dev)
{
return 0;
}
static int bat_set_rx_csum(struct net_device *dev, u32 data)
{
return -EOPNOTSUPP;
}
