Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
666 lines
18 KiB
C
666 lines
18 KiB
C
/* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#include "main.h"
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#include "soft-interface.h"
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#include "hard-interface.h"
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#include "distributed-arp-table.h"
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#include "routing.h"
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#include "send.h"
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#include "debugfs.h"
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#include "translation-table.h"
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#include "hash.h"
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#include "gateway_common.h"
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#include "gateway_client.h"
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#include "sysfs.h"
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#include "originator.h"
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#include <linux/slab.h>
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#include <linux/ethtool.h>
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#include <linux/etherdevice.h>
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#include <linux/if_vlan.h>
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#include <linux/if_ether.h>
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#include "unicast.h"
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#include "bridge_loop_avoidance.h"
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static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
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static void batadv_get_drvinfo(struct net_device *dev,
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struct ethtool_drvinfo *info);
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static u32 batadv_get_msglevel(struct net_device *dev);
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static void batadv_set_msglevel(struct net_device *dev, u32 value);
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static u32 batadv_get_link(struct net_device *dev);
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static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
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static void batadv_get_ethtool_stats(struct net_device *dev,
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struct ethtool_stats *stats, u64 *data);
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static int batadv_get_sset_count(struct net_device *dev, int stringset);
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static const struct ethtool_ops batadv_ethtool_ops = {
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.get_settings = batadv_get_settings,
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.get_drvinfo = batadv_get_drvinfo,
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.get_msglevel = batadv_get_msglevel,
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.set_msglevel = batadv_set_msglevel,
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.get_link = batadv_get_link,
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.get_strings = batadv_get_strings,
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.get_ethtool_stats = batadv_get_ethtool_stats,
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.get_sset_count = batadv_get_sset_count,
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};
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int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
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{
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int result;
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/* TODO: We must check if we can release all references to non-payload
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* data using skb_header_release in our skbs to allow skb_cow_header to
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* work optimally. This means that those skbs are not allowed to read
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* or write any data which is before the current position of skb->data
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* after that call and thus allow other skbs with the same data buffer
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* to write freely in that area.
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*/
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result = skb_cow_head(skb, len);
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if (result < 0)
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return result;
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skb_push(skb, len);
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return 0;
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}
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static int batadv_interface_open(struct net_device *dev)
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{
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netif_start_queue(dev);
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return 0;
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}
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static int batadv_interface_release(struct net_device *dev)
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{
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netif_stop_queue(dev);
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return 0;
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}
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static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
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{
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struct batadv_priv *bat_priv = netdev_priv(dev);
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struct net_device_stats *stats = &bat_priv->stats;
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stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
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stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
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stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
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stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
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stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
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return stats;
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}
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static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
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{
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struct batadv_priv *bat_priv = netdev_priv(dev);
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struct sockaddr *addr = p;
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uint8_t old_addr[ETH_ALEN];
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if (!is_valid_ether_addr(addr->sa_data))
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return -EADDRNOTAVAIL;
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memcpy(old_addr, dev->dev_addr, ETH_ALEN);
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memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
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/* only modify transtable if it has been initialized before */
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if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
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batadv_tt_local_remove(bat_priv, old_addr,
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"mac address changed", false);
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batadv_tt_local_add(dev, addr->sa_data, BATADV_NULL_IFINDEX);
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}
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return 0;
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}
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static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
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{
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/* check ranges */
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if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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}
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static int batadv_interface_tx(struct sk_buff *skb,
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struct net_device *soft_iface)
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{
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struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
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struct batadv_priv *bat_priv = netdev_priv(soft_iface);
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struct batadv_hard_iface *primary_if = NULL;
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struct batadv_bcast_packet *bcast_packet;
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struct vlan_ethhdr *vhdr;
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__be16 ethertype = __constant_htons(ETH_P_BATMAN);
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static const uint8_t stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
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0x00, 0x00};
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static const uint8_t ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
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0x00, 0x00};
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unsigned int header_len = 0;
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int data_len = skb->len, ret;
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short vid __maybe_unused = -1;
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bool do_bcast = false;
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uint32_t seqno;
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unsigned long brd_delay = 1;
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if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
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goto dropped;
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soft_iface->trans_start = jiffies;
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switch (ntohs(ethhdr->h_proto)) {
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case ETH_P_8021Q:
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vhdr = (struct vlan_ethhdr *)skb->data;
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vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
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if (vhdr->h_vlan_encapsulated_proto != ethertype)
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break;
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/* fall through */
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case ETH_P_BATMAN:
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goto dropped;
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}
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if (batadv_bla_tx(bat_priv, skb, vid))
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goto dropped;
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/* Register the client MAC in the transtable */
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if (!is_multicast_ether_addr(ethhdr->h_source))
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batadv_tt_local_add(soft_iface, ethhdr->h_source, skb->skb_iif);
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/* don't accept stp packets. STP does not help in meshes.
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* better use the bridge loop avoidance ...
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*
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* The same goes for ECTP sent at least by some Cisco Switches,
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* it might confuse the mesh when used with bridge loop avoidance.
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*/
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if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
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goto dropped;
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if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
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goto dropped;
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if (is_multicast_ether_addr(ethhdr->h_dest)) {
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do_bcast = true;
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switch (atomic_read(&bat_priv->gw_mode)) {
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case BATADV_GW_MODE_SERVER:
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/* gateway servers should not send dhcp
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* requests into the mesh
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*/
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ret = batadv_gw_is_dhcp_target(skb, &header_len);
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if (ret)
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goto dropped;
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break;
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case BATADV_GW_MODE_CLIENT:
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/* gateway clients should send dhcp requests
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* via unicast to their gateway
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*/
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ret = batadv_gw_is_dhcp_target(skb, &header_len);
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if (ret)
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do_bcast = false;
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break;
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case BATADV_GW_MODE_OFF:
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default:
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break;
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}
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}
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/* ethernet packet should be broadcasted */
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if (do_bcast) {
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primary_if = batadv_primary_if_get_selected(bat_priv);
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if (!primary_if)
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goto dropped;
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/* in case of ARP request, we do not immediately broadcasti the
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* packet, instead we first wait for DAT to try to retrieve the
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* correct ARP entry
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*/
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if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
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brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
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if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
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goto dropped;
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bcast_packet = (struct batadv_bcast_packet *)skb->data;
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bcast_packet->header.version = BATADV_COMPAT_VERSION;
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bcast_packet->header.ttl = BATADV_TTL;
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/* batman packet type: broadcast */
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bcast_packet->header.packet_type = BATADV_BCAST;
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bcast_packet->reserved = 0;
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/* hw address of first interface is the orig mac because only
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* this mac is known throughout the mesh
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*/
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memcpy(bcast_packet->orig,
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primary_if->net_dev->dev_addr, ETH_ALEN);
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/* set broadcast sequence number */
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seqno = atomic_inc_return(&bat_priv->bcast_seqno);
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bcast_packet->seqno = htonl(seqno);
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batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
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/* a copy is stored in the bcast list, therefore removing
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* the original skb.
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*/
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kfree_skb(skb);
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/* unicast packet */
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} else {
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if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_OFF) {
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ret = batadv_gw_out_of_range(bat_priv, skb, ethhdr);
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if (ret)
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goto dropped;
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}
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if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
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goto dropped;
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batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
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ret = batadv_unicast_send_skb(bat_priv, skb);
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if (ret != 0)
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goto dropped_freed;
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}
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batadv_inc_counter(bat_priv, BATADV_CNT_TX);
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batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
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goto end;
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dropped:
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kfree_skb(skb);
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dropped_freed:
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batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
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end:
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if (primary_if)
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batadv_hardif_free_ref(primary_if);
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return NETDEV_TX_OK;
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}
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void batadv_interface_rx(struct net_device *soft_iface,
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struct sk_buff *skb, struct batadv_hard_iface *recv_if,
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int hdr_size, struct batadv_orig_node *orig_node)
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{
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struct batadv_priv *bat_priv = netdev_priv(soft_iface);
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struct ethhdr *ethhdr;
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struct vlan_ethhdr *vhdr;
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struct batadv_header *batadv_header = (struct batadv_header *)skb->data;
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short vid __maybe_unused = -1;
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__be16 ethertype = __constant_htons(ETH_P_BATMAN);
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bool is_bcast;
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is_bcast = (batadv_header->packet_type == BATADV_BCAST);
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/* check if enough space is available for pulling, and pull */
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if (!pskb_may_pull(skb, hdr_size))
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goto dropped;
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skb_pull_rcsum(skb, hdr_size);
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skb_reset_mac_header(skb);
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ethhdr = (struct ethhdr *)skb_mac_header(skb);
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switch (ntohs(ethhdr->h_proto)) {
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case ETH_P_8021Q:
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vhdr = (struct vlan_ethhdr *)skb->data;
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vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
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if (vhdr->h_vlan_encapsulated_proto != ethertype)
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break;
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/* fall through */
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case ETH_P_BATMAN:
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goto dropped;
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}
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/* skb->dev & skb->pkt_type are set here */
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if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
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goto dropped;
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skb->protocol = eth_type_trans(skb, soft_iface);
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/* should not be necessary anymore as we use skb_pull_rcsum()
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* TODO: please verify this and remove this TODO
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* -- Dec 21st 2009, Simon Wunderlich
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*/
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/* skb->ip_summed = CHECKSUM_UNNECESSARY; */
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batadv_inc_counter(bat_priv, BATADV_CNT_RX);
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batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
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skb->len + ETH_HLEN);
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soft_iface->last_rx = jiffies;
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/* Let the bridge loop avoidance check the packet. If will
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* not handle it, we can safely push it up.
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*/
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if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
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goto out;
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if (orig_node)
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batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
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ethhdr->h_source);
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if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest))
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goto dropped;
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netif_rx(skb);
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goto out;
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dropped:
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kfree_skb(skb);
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out:
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return;
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}
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/* batman-adv network devices have devices nesting below it and are a special
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* "super class" of normal network devices; split their locks off into a
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* separate class since they always nest.
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*/
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static struct lock_class_key batadv_netdev_xmit_lock_key;
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static struct lock_class_key batadv_netdev_addr_lock_key;
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/**
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* batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
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* @dev: device which owns the tx queue
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* @txq: tx queue to modify
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* @_unused: always NULL
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*/
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static void batadv_set_lockdep_class_one(struct net_device *dev,
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struct netdev_queue *txq,
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void *_unused)
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{
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lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
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}
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/**
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* batadv_set_lockdep_class - Set txq and addr_list lockdep class
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* @dev: network device to modify
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*/
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static void batadv_set_lockdep_class(struct net_device *dev)
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{
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lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
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netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
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}
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/**
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* batadv_softif_init - Late stage initialization of soft interface
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* @dev: registered network device to modify
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*
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* Returns error code on failures
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*/
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static int batadv_softif_init(struct net_device *dev)
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{
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batadv_set_lockdep_class(dev);
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return 0;
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}
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static const struct net_device_ops batadv_netdev_ops = {
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.ndo_init = batadv_softif_init,
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.ndo_open = batadv_interface_open,
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.ndo_stop = batadv_interface_release,
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.ndo_get_stats = batadv_interface_stats,
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.ndo_set_mac_address = batadv_interface_set_mac_addr,
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.ndo_change_mtu = batadv_interface_change_mtu,
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.ndo_start_xmit = batadv_interface_tx,
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.ndo_validate_addr = eth_validate_addr
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};
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static void batadv_interface_setup(struct net_device *dev)
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{
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struct batadv_priv *priv = netdev_priv(dev);
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ether_setup(dev);
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dev->netdev_ops = &batadv_netdev_ops;
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dev->destructor = free_netdev;
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dev->tx_queue_len = 0;
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/* can't call min_mtu, because the needed variables
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* have not been initialized yet
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*/
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dev->mtu = ETH_DATA_LEN;
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/* reserve more space in the skbuff for our header */
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dev->hard_header_len = BATADV_HEADER_LEN;
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/* generate random address */
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eth_hw_addr_random(dev);
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SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops);
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memset(priv, 0, sizeof(*priv));
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}
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struct net_device *batadv_softif_create(const char *name)
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{
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struct net_device *soft_iface;
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struct batadv_priv *bat_priv;
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int ret;
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size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
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soft_iface = alloc_netdev(sizeof(*bat_priv), name,
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batadv_interface_setup);
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if (!soft_iface)
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goto out;
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bat_priv = netdev_priv(soft_iface);
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/* batadv_interface_stats() needs to be available as soon as
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* register_netdevice() has been called
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*/
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bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
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if (!bat_priv->bat_counters)
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goto free_soft_iface;
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ret = register_netdevice(soft_iface);
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if (ret < 0) {
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pr_err("Unable to register the batman interface '%s': %i\n",
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name, ret);
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goto free_bat_counters;
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}
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atomic_set(&bat_priv->aggregated_ogms, 1);
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atomic_set(&bat_priv->bonding, 0);
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
atomic_set(&bat_priv->bridge_loop_avoidance, 0);
|
|
#endif
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
atomic_set(&bat_priv->distributed_arp_table, 1);
|
|
#endif
|
|
atomic_set(&bat_priv->ap_isolation, 0);
|
|
atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE);
|
|
atomic_set(&bat_priv->gw_mode, BATADV_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, 30);
|
|
#ifdef CONFIG_BATMAN_ADV_DEBUG
|
|
atomic_set(&bat_priv->log_level, 0);
|
|
#endif
|
|
atomic_set(&bat_priv->fragmentation, 1);
|
|
atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
|
|
atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
|
|
|
|
atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
|
|
atomic_set(&bat_priv->bcast_seqno, 1);
|
|
atomic_set(&bat_priv->tt.vn, 0);
|
|
atomic_set(&bat_priv->tt.local_changes, 0);
|
|
atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
atomic_set(&bat_priv->bla.num_requests, 0);
|
|
#endif
|
|
bat_priv->tt.last_changeset = NULL;
|
|
bat_priv->tt.last_changeset_len = 0;
|
|
|
|
bat_priv->primary_if = NULL;
|
|
bat_priv->num_ifaces = 0;
|
|
|
|
ret = batadv_algo_select(bat_priv, batadv_routing_algo);
|
|
if (ret < 0)
|
|
goto unreg_soft_iface;
|
|
|
|
ret = batadv_sysfs_add_meshif(soft_iface);
|
|
if (ret < 0)
|
|
goto unreg_soft_iface;
|
|
|
|
ret = batadv_debugfs_add_meshif(soft_iface);
|
|
if (ret < 0)
|
|
goto unreg_sysfs;
|
|
|
|
ret = batadv_mesh_init(soft_iface);
|
|
if (ret < 0)
|
|
goto unreg_debugfs;
|
|
|
|
return soft_iface;
|
|
|
|
unreg_debugfs:
|
|
batadv_debugfs_del_meshif(soft_iface);
|
|
unreg_sysfs:
|
|
batadv_sysfs_del_meshif(soft_iface);
|
|
unreg_soft_iface:
|
|
free_percpu(bat_priv->bat_counters);
|
|
unregister_netdevice(soft_iface);
|
|
return NULL;
|
|
|
|
free_bat_counters:
|
|
free_percpu(bat_priv->bat_counters);
|
|
free_soft_iface:
|
|
free_netdev(soft_iface);
|
|
out:
|
|
return NULL;
|
|
}
|
|
|
|
void batadv_softif_destroy(struct net_device *soft_iface)
|
|
{
|
|
batadv_debugfs_del_meshif(soft_iface);
|
|
batadv_sysfs_del_meshif(soft_iface);
|
|
batadv_mesh_free(soft_iface);
|
|
unregister_netdevice(soft_iface);
|
|
}
|
|
|
|
int batadv_softif_is_valid(const struct net_device *net_dev)
|
|
{
|
|
if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ethtool */
|
|
static int batadv_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 batadv_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
|
|
strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
|
|
strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
|
|
strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
|
|
}
|
|
|
|
static u32 batadv_get_msglevel(struct net_device *dev)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static void batadv_set_msglevel(struct net_device *dev, u32 value)
|
|
{
|
|
}
|
|
|
|
static u32 batadv_get_link(struct net_device *dev)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
|
|
* Declare each description string in struct.name[] to get fixed sized buffer
|
|
* and compile time checking for strings longer than ETH_GSTRING_LEN.
|
|
*/
|
|
static const struct {
|
|
const char name[ETH_GSTRING_LEN];
|
|
} batadv_counters_strings[] = {
|
|
{ "tx" },
|
|
{ "tx_bytes" },
|
|
{ "tx_dropped" },
|
|
{ "rx" },
|
|
{ "rx_bytes" },
|
|
{ "forward" },
|
|
{ "forward_bytes" },
|
|
{ "mgmt_tx" },
|
|
{ "mgmt_tx_bytes" },
|
|
{ "mgmt_rx" },
|
|
{ "mgmt_rx_bytes" },
|
|
{ "tt_request_tx" },
|
|
{ "tt_request_rx" },
|
|
{ "tt_response_tx" },
|
|
{ "tt_response_rx" },
|
|
{ "tt_roam_adv_tx" },
|
|
{ "tt_roam_adv_rx" },
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
{ "dat_get_tx" },
|
|
{ "dat_get_rx" },
|
|
{ "dat_put_tx" },
|
|
{ "dat_put_rx" },
|
|
{ "dat_cached_reply_tx" },
|
|
#endif
|
|
};
|
|
|
|
static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
|
|
uint8_t *data)
|
|
{
|
|
if (stringset == ETH_SS_STATS)
|
|
memcpy(data, batadv_counters_strings,
|
|
sizeof(batadv_counters_strings));
|
|
}
|
|
|
|
static void batadv_get_ethtool_stats(struct net_device *dev,
|
|
struct ethtool_stats *stats,
|
|
uint64_t *data)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(dev);
|
|
int i;
|
|
|
|
for (i = 0; i < BATADV_CNT_NUM; i++)
|
|
data[i] = batadv_sum_counter(bat_priv, i);
|
|
}
|
|
|
|
static int batadv_get_sset_count(struct net_device *dev, int stringset)
|
|
{
|
|
if (stringset == ETH_SS_STATS)
|
|
return BATADV_CNT_NUM;
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|