![Sven Eckelmann](/assets/img/avatar_default.png)
Documentation/CodingStyle sets a strongly prefered limit of 80 characters per line in "Chapter 2: Breaking long lines and strings". Strings must be broken into smaller parts and long statements must be rewritten. Reported-by: Mikal Sande <mikal.sande@gmail.com> Reported-by: Mark Rankilor <reodge@gmail.com> Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
367 lines
9.1 KiB
C
367 lines
9.1 KiB
C
/*
|
|
* 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 "send.h"
|
|
#include "translation-table.h"
|
|
#include "types.h"
|
|
#include "hash.h"
|
|
#include <linux/slab.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/etherdevice.h>
|
|
|
|
static uint16_t bcast_seqno = 1; /* give own bcast messages seq numbers to avoid
|
|
* broadcast storms */
|
|
static int32_t skb_packets;
|
|
static int32_t skb_bad_packets;
|
|
|
|
unsigned char mainIfAddr[ETH_ALEN];
|
|
static unsigned char mainIfAddr_default[ETH_ALEN];
|
|
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
|
|
};
|
|
|
|
void set_main_if_addr(uint8_t *addr)
|
|
{
|
|
memcpy(mainIfAddr, addr, ETH_ALEN);
|
|
}
|
|
|
|
int main_if_was_up(void)
|
|
{
|
|
return (memcmp(mainIfAddr, mainIfAddr_default, ETH_ALEN) != 0 ? 1 : 0);
|
|
}
|
|
|
|
int my_skb_push(struct sk_buff *skb, unsigned int len)
|
|
{
|
|
int result = 0;
|
|
|
|
skb_packets++;
|
|
if (skb_headroom(skb) < len) {
|
|
skb_bad_packets++;
|
|
result = pskb_expand_head(skb, len, 0, GFP_ATOMIC);
|
|
|
|
if (result < 0)
|
|
return result;
|
|
}
|
|
|
|
skb_push(skb, len);
|
|
return 0;
|
|
}
|
|
|
|
#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
|
|
|
|
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;
|
|
|
|
dev->mtu = hardif_min_mtu();
|
|
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));
|
|
}
|
|
|
|
int interface_open(struct net_device *dev)
|
|
{
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
int interface_release(struct net_device *dev)
|
|
{
|
|
netif_stop_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
struct net_device_stats *interface_stats(struct net_device *dev)
|
|
{
|
|
struct bat_priv *priv = netdev_priv(dev);
|
|
return &priv->stats;
|
|
}
|
|
|
|
int interface_set_mac_addr(struct net_device *dev, void *p)
|
|
{
|
|
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(&module_state) == MODULE_ACTIVE) {
|
|
hna_local_remove(dev->dev_addr, "mac address changed");
|
|
hna_local_add(addr->sa_data);
|
|
}
|
|
|
|
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int interface_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
/* check ranges */
|
|
if ((new_mtu < 68) || (new_mtu > hardif_min_mtu()))
|
|
return -EINVAL;
|
|
|
|
dev->mtu = new_mtu;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int interface_tx(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct unicast_packet *unicast_packet;
|
|
struct bcast_packet *bcast_packet;
|
|
struct orig_node *orig_node;
|
|
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
|
|
struct bat_priv *priv = netdev_priv(dev);
|
|
struct batman_if *batman_if;
|
|
struct bat_priv *bat_priv;
|
|
uint8_t dstaddr[6];
|
|
int data_len = skb->len;
|
|
unsigned long flags;
|
|
|
|
if (atomic_read(&module_state) != MODULE_ACTIVE)
|
|
goto dropped;
|
|
|
|
/* FIXME: each batman_if will be attached to a softif */
|
|
bat_priv = netdev_priv(soft_device);
|
|
|
|
dev->trans_start = jiffies;
|
|
/* TODO: check this for locks */
|
|
hna_local_add(ethhdr->h_source);
|
|
|
|
/* ethernet packet should be broadcasted */
|
|
if (is_bcast(ethhdr->h_dest) || is_mcast(ethhdr->h_dest)) {
|
|
|
|
if (my_skb_push(skb, sizeof(struct bcast_packet)) < 0)
|
|
goto dropped;
|
|
|
|
bcast_packet = (struct bcast_packet *)skb->data;
|
|
bcast_packet->version = COMPAT_VERSION;
|
|
|
|
/* 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, mainIfAddr, ETH_ALEN);
|
|
|
|
/* set broadcast sequence number */
|
|
bcast_packet->seqno = htons(bcast_seqno);
|
|
|
|
/* broadcast packet. on success, increase seqno. */
|
|
if (add_bcast_packet_to_list(skb) == NETDEV_TX_OK)
|
|
bcast_seqno++;
|
|
|
|
/* a copy is stored in the bcast list, therefore removing
|
|
* the original skb. */
|
|
kfree_skb(skb);
|
|
|
|
/* unicast packet */
|
|
} else {
|
|
spin_lock_irqsave(&orig_hash_lock, flags);
|
|
/* get routing information */
|
|
orig_node = ((struct orig_node *)hash_find(orig_hash,
|
|
ethhdr->h_dest));
|
|
|
|
/* check for hna host */
|
|
if (!orig_node)
|
|
orig_node = transtable_search(ethhdr->h_dest);
|
|
|
|
if ((orig_node) &&
|
|
(orig_node->router)) {
|
|
struct neigh_node *router = orig_node->router;
|
|
|
|
if (my_skb_push(skb, sizeof(struct unicast_packet)) < 0)
|
|
goto unlock;
|
|
|
|
unicast_packet = (struct unicast_packet *)skb->data;
|
|
|
|
unicast_packet->version = COMPAT_VERSION;
|
|
/* batman packet type: unicast */
|
|
unicast_packet->packet_type = BAT_UNICAST;
|
|
/* set unicast ttl */
|
|
unicast_packet->ttl = TTL;
|
|
/* copy the destination for faster routing */
|
|
memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
|
|
|
|
/* net_dev won't be available when not active */
|
|
if (router->if_incoming->if_status != IF_ACTIVE)
|
|
goto unlock;
|
|
|
|
/* don't lock while sending the packets ... we therefore
|
|
* copy the required data before sending */
|
|
|
|
batman_if = router->if_incoming;
|
|
memcpy(dstaddr, router->addr, ETH_ALEN);
|
|
spin_unlock_irqrestore(&orig_hash_lock, flags);
|
|
|
|
send_skb_packet(skb, batman_if, dstaddr);
|
|
} else {
|
|
goto unlock;
|
|
}
|
|
}
|
|
|
|
priv->stats.tx_packets++;
|
|
priv->stats.tx_bytes += data_len;
|
|
goto end;
|
|
|
|
unlock:
|
|
spin_unlock_irqrestore(&orig_hash_lock, flags);
|
|
dropped:
|
|
priv->stats.tx_dropped++;
|
|
kfree_skb(skb);
|
|
end:
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
void interface_rx(struct sk_buff *skb, int hdr_size)
|
|
{
|
|
struct net_device *dev = soft_device;
|
|
struct bat_priv *priv = netdev_priv(dev);
|
|
|
|
/* 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 = dev;
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
|
|
/* 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;*/
|
|
|
|
/* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST,
|
|
* PACKET_OTHERHOST or PACKET_HOST */
|
|
|
|
priv->stats.rx_packets++;
|
|
priv->stats.rx_bytes += skb->len;
|
|
|
|
dev->last_rx = jiffies;
|
|
|
|
netif_rx(skb);
|
|
}
|
|
|
|
/* 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;
|
|
}
|