@@ -23,8 +23,6 @@
export CONFIG_BATMAN_ADV_DEBUG=n
# B.A.T.M.A.N. bridge loop avoidance:
export CONFIG_BATMAN_ADV_BLA=y
-# B.A.T.M.A.N. distributed ARP table:
-export CONFIG_BATMAN_ADV_DAT=y
PWD:=$(shell pwd)
KERNELPATH ?= /lib/modules/$(shell uname -r)/build
@@ -24,7 +24,6 @@ batman-adv-y += bat_iv_ogm.o
batman-adv-y += bat_sysfs.o
batman-adv-y += bitarray.o
batman-adv-$(CONFIG_BATMAN_ADV_BLA) += bridge_loop_avoidance.o
-batman-adv-$(CONFIG_BATMAN_ADV_DAT) += distributed-arp-table.o
batman-adv-y += gateway_client.o
batman-adv-y += gateway_common.o
batman-adv-y += hard-interface.o
@@ -202,8 +202,7 @@ abled during run time. Following log_levels are defined:
2 - Enable messages related to route added / changed / deleted
4 - Enable messages related to translation table operations
8 - Enable messages related to bridge loop avoidance
-16 - Enable messaged related to DAT, ARP snooping and parsing
-31 - Enable all messages
+15 - enable all messages
The debug output can be changed at runtime using the file
/sys/class/net/bat0/mesh/log_level. e.g.
@@ -37,7 +37,6 @@ module). Available options and their possible values are
* CONFIG_BATMAN_ADV_DEBUG=[y|n*] (B.A.T.M.A.N. debugging)
* CONFIG_BATMAN_ADV_BLA=[y*|n] (B.A.T.M.A.N. bridge loop avoidance)
- * CONFIG_BATMAN_ADV_DAT=[y*|n] (B.A.T.M.A.N. Distributed ARP Table)
e.g., debugging can be enabled by
deleted file mode 100644
@@ -1,684 +0,0 @@
-/* Copyright (C) 2011-2012 B.A.T.M.A.N. contributors:
- *
- * Antonio Quartulli
- *
- * 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 <linux/if_ether.h>
-#include <linux/if_arp.h>
-/* needed to use arp_tbl */
-#include <net/arp.h>
-#include <linux/inetdevice.h>
-
-#include "main.h"
-#include "distributed-arp-table.h"
-#include "hard-interface.h"
-#include "originator.h"
-#include "send.h"
-#include "types.h"
-#include "translation-table.h"
-#include "unicast.h"
-
-static uint8_t *batadv_arp_hw_src(struct sk_buff *skb, int hdr_size)
-{
- uint8_t *addr;
-
- addr = (uint8_t *)(skb->data + hdr_size);
- addr += ETH_HLEN + sizeof(struct arphdr);
-
- return addr;
-}
-
-static __be32 batadv_arp_ip_src(struct sk_buff *skb, int hdr_size)
-{
- return *(__be32 *)(batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN);
-}
-
-static uint8_t *batadv_arp_hw_dst(struct sk_buff *skb, int hdr_size)
-{
- return batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN + 4;
-}
-
-static __be32 batadv_arp_ip_dst(struct sk_buff *skb, int hdr_size)
-{
- return *(__be32 *)(batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN * 2 + 4);
-}
-
-/* hash function to choose an entry in a hash table of given size.
- * hash algorithm from http://en.wikipedia.org/wiki/Hash_table
- */
-static uint32_t batadv_hash_ipv4(const void *data, uint32_t size)
-{
- const unsigned char *key = data;
- uint32_t hash = 0;
- size_t i;
-
- for (i = 0; i < 4; i++) {
- hash += key[i];
- hash += (hash << 10);
- hash ^= (hash >> 6);
- }
-
- hash += (hash << 3);
- hash ^= (hash >> 11);
- hash += (hash << 15);
-
- return hash % size;
-}
-
-#ifdef CONFIG_BATMAN_ADV_DEBUG
-
-static void batadv_dbg_arp(struct bat_priv *bat_priv, struct sk_buff *skb,
- uint16_t type, int hdr_size, char *msg)
-{
- struct unicast_4addr_packet *unicast_4addr_packet;
- __be32 src_ip, dst_ip;
-
- if (msg)
- batadv_dbg(DBG_DAT, bat_priv, "%s\n", msg);
-
- src_ip = batadv_arp_ip_src(skb, hdr_size);
- dst_ip = batadv_arp_ip_dst(skb, hdr_size);
- batadv_dbg(DBG_DAT, bat_priv,
- "ARP MSG = [src: %pM-%pI4 dst: %pM-%pI4]\n",
- batadv_arp_hw_src(skb, hdr_size), &src_ip,
- batadv_arp_hw_dst(skb, hdr_size), &dst_ip);
-
- if (hdr_size == 0)
- return;
-
- /* if the AP packet is encapsulated in a batman packet, let's print some
- * debug messages
- */
- unicast_4addr_packet = (struct unicast_4addr_packet *)skb->data;
-
- switch (unicast_4addr_packet->u.header.packet_type) {
- case BAT_UNICAST:
- batadv_dbg(DBG_DAT, bat_priv,
- "* encapsulated within a UNICAST packet\n");
- break;
- case BAT_UNICAST_4ADDR:
- batadv_dbg(DBG_DAT, bat_priv,
- "* encapsulated within a UNICAST_4ADDR packet (src: %pM)\n",
- unicast_4addr_packet->src);
- switch (unicast_4addr_packet->subtype) {
- case BAT_P_DAT_DHT_PUT:
- batadv_dbg(DBG_DAT, bat_priv, "* type: DAT_DHT_PUT\n");
- break;
- case BAT_P_DAT_DHT_GET:
- batadv_dbg(DBG_DAT, bat_priv, "* type: DAT_DHT_GET\n");
- break;
- case BAT_P_DAT_CACHE_REPLY:
- batadv_dbg(DBG_DAT, bat_priv,
- "* type: DAT_CACHE_REPLY\n");
- break;
- case BAT_P_DATA:
- batadv_dbg(DBG_DAT, bat_priv, "* type: DATA\n");
- break;
- default:
- batadv_dbg(DBG_DAT, bat_priv, "* type: Unknown!\n");
- }
- break;
- case BAT_BCAST:
- batadv_dbg(DBG_DAT, bat_priv,
- "* encapsulated within a BCAST packet (src: %pM)\n",
- ((struct bcast_packet *)unicast_4addr_packet)->orig);
- break;
- default:
- batadv_dbg(DBG_DAT, bat_priv,
- "* encapsulated within an unknown packet type (0x%x)\n",
- unicast_4addr_packet->u.header.packet_type);
- }
-}
-
-#else
-
-static void batadv_dbg_arp(struct bat_priv *bat_priv, struct sk_buff *skb,
- uint16_t type, int hdr_size, char *msg)
-{
-}
-
-#endif /* CONFIG_BATMAN_ADV_DEBUG */
-
-static bool batadv_is_orig_node_eligible(struct dht_candidate *res, int select,
- dat_addr_t tmp_max, dat_addr_t max,
- dat_addr_t last_max,
- struct orig_node *candidate,
- struct orig_node *max_orig_node)
-{
- bool ret = false;
- int j;
-
- /* Check if we have already selected this neighbour... */
- for (j = 0; j < select; j++)
- if (res[j].orig_node == candidate)
- break;
- /* ..and possibly skip it */
- if (j < select)
- goto out;
- /* sanity check: has it already been selected? This should not happen */
- if (tmp_max > last_max)
- goto out;
- /* check if during this iteration we have already found an originator
- * with a closer dht address
- */
- if (tmp_max < max)
- goto out;
- /* this is an hash collision with the temporary selected node. Choose
- * the one with the lowest address
- */
- if ((tmp_max == max) &&
- (batadv_compare_eth(candidate->orig, max_orig_node->orig) > 0))
- goto out;
-
- ret = true;
-out:
- return ret;
-}
-
-/* selects the next candidate by populating cands[select] and modifies last_max
- * accordingly
- */
-static void batadv_choose_next_candidate(struct bat_priv *bat_priv,
- struct dht_candidate *cands,
- int select, dat_addr_t ip_key,
- dat_addr_t *last_max)
-{
- dat_addr_t max = 0, tmp_max = 0;
- struct orig_node *orig_node, *max_orig_node = NULL;
- struct hashtable_t *hash = bat_priv->orig_hash;
- struct hlist_node *node;
- struct hlist_head *head;
- int i;
-
- /* if no node is eligible as candidate, we will leave the candidate as
- * NOT_FOUND
- */
- cands[select].type = DHT_CANDIDATE_NOT_FOUND;
-
- /* iterate over the originator list and find the node with closest
- * dht_address which has not been selected yet
- */
- for (i = 0; i < hash->size; i++) {
- head = &hash->table[i];
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
- /* the dht space is a ring and addresses are unsigned */
- tmp_max = DAT_ADDR_MAX - orig_node->dht_addr + ip_key;
-
- if (!batadv_is_orig_node_eligible(cands, select,
- tmp_max, max,
- *last_max, orig_node,
- max_orig_node))
- continue;
-
- if (!atomic_inc_not_zero(&orig_node->refcount))
- continue;
-
- max = tmp_max;
- if (max_orig_node)
- batadv_orig_node_free_ref(max_orig_node);
- max_orig_node = orig_node;
- }
- rcu_read_unlock();
- }
- if (max_orig_node) {
- cands[select].type = DHT_CANDIDATE_ORIG;
- cands[select].orig_node = max_orig_node;
- batadv_dbg(DBG_DAT, bat_priv,
- "dht_select_candidates() %d: selected %pM addr=%u dist=%u\n",
- select, max_orig_node->orig, max_orig_node->dht_addr,
- max);
- }
- *last_max = max;
-}
-
-/* Given a key, selects the candidates which the DHT message has to be sent to.
- * An originator O is selected if and only if its DHT_ID value is one of three
- * closest values (from the LEFT, with wrap around if needed) then the hash
- * value of the key. ip_dst is the key.
- *
- * return an array of size DHT_CANDIDATES_NUM
- */
-static struct dht_candidate *
-batadv_dht_select_candidates(struct bat_priv *bat_priv, __be32 ip_dst)
-{
- int select;
- dat_addr_t last_max = DAT_ADDR_MAX, ip_key;
- struct dht_candidate *res;
-
- if (!bat_priv->orig_hash)
- return NULL;
-
- res = kmalloc(DHT_CANDIDATES_NUM * sizeof(*res), GFP_ATOMIC);
- if (!res)
- return NULL;
-
- ip_key = (dat_addr_t)batadv_hash_ipv4(&ip_dst, DAT_ADDR_MAX);
-
- batadv_dbg(DBG_DAT, bat_priv,
- "dht_select_candidates(): IP=%pI4 hash(IP)=%u\n", &ip_dst,
- ip_key);
-
- for (select = 0; select < DHT_CANDIDATES_NUM; select++)
- batadv_choose_next_candidate(bat_priv, res, select, ip_key,
- &last_max);
-
- return res;
-}
-
-/* Sends the skb payload passed as argument to the candidates selected for
- * the data represented by 'ip'. The skb is copied by means of pskb_copy()
- * and is sent as unicast packet to each of the selected candidate.
- *
- * If the packet is successfully sent to at least one candidate, then this
- * function returns true
- */
-static bool batadv_dht_send_data(struct bat_priv *bat_priv,
- struct sk_buff *skb, __be32 ip,
- int packet_subtype)
-{
- int i;
- bool ret = false;
- int send_status;
- struct neigh_node *neigh_node = NULL;
- struct sk_buff *tmp_skb;
- struct dht_candidate *cand = batadv_dht_select_candidates(bat_priv, ip);
-
- if (!cand)
- goto out;
-
- batadv_dbg(DBG_DAT, bat_priv, "DHT_SEND for %pI4\n", &ip);
-
- for (i = 0; i < DHT_CANDIDATES_NUM; i++) {
- if (cand[i].type == DHT_CANDIDATE_NOT_FOUND)
- continue;
-
- neigh_node = batadv_orig_node_get_router(cand[i].orig_node);
- if (!neigh_node)
- goto free_orig;
-
- tmp_skb = pskb_copy(skb, GFP_ATOMIC);
- if (!batadv_prepare_unicast_4addr_packet(bat_priv, tmp_skb,
- cand[i].orig_node,
- packet_subtype)) {
- kfree_skb(tmp_skb);
- goto free_neigh;
- }
-
- send_status = batadv_send_skb_packet(tmp_skb,
- neigh_node->if_incoming,
- neigh_node->addr);
- if (send_status == NET_XMIT_SUCCESS)
- /* packet sent to a candidate: we can return true */
- ret = true;
-free_neigh:
- batadv_neigh_node_free_ref(neigh_node);
-free_orig:
- batadv_orig_node_free_ref(cand[i].orig_node);
- }
-
-out:
- kfree(cand);
- return ret;
-}
-
-/* Update the neighbour entry corresponding to the IP passed as parameter with
- * the hw address hw. If the neighbour entry doesn't exists, then it will be
- * created
- */
-static void batadv_arp_neigh_update(struct bat_priv *bat_priv, __be32 ip,
- uint8_t *hw)
-{
- struct neighbour *n = NULL;
- struct hard_iface *primary_if;
-
- primary_if = batadv_primary_if_get_selected(bat_priv);
- if (!primary_if)
- goto out;
-
- n = __neigh_lookup(&arp_tbl, &ip, primary_if->soft_iface, 1);
- if (!n)
- goto out;
-
- batadv_dbg(DBG_DAT, bat_priv, "Updating neighbour: %pI4 - %pM\n", &ip,
- hw);
-
- neigh_update(n, hw, NUD_REACHABLE, NEIGH_UPDATE_F_OVERRIDE);
-out:
- if (n && !IS_ERR(n))
- neigh_release(n);
- if (primary_if)
- batadv_hardif_free_ref(primary_if);
-}
-
-/* Returns arphdr->ar_op if the skb contains a valid ARP packet, otherwise
- * returns 0
- */
-static uint16_t batadv_arp_get_type(struct bat_priv *bat_priv,
- struct sk_buff *skb, int hdr_size)
-{
- struct arphdr *arphdr;
- struct ethhdr *ethhdr;
- __be32 ip_src, ip_dst;
- uint16_t type = 0;
-
- /* pull the ethernet header */
- if (unlikely(!pskb_may_pull(skb, hdr_size + ETH_HLEN)))
- goto out;
-
- ethhdr = (struct ethhdr *)(skb->data + hdr_size);
-
- if (ethhdr->h_proto != htons(ETH_P_ARP))
- goto out;
-
- /* pull the ARP payload */
- if (unlikely(!pskb_may_pull(skb, hdr_size + ETH_HLEN +
- arp_hdr_len(skb->dev))))
- goto out;
-
- arphdr = (struct arphdr *)(skb->data + hdr_size + ETH_HLEN);
-
- /* Check whether the ARP packet carries a valid
- * IP information
- */
- if (arphdr->ar_hrd != htons(ARPHRD_ETHER))
- goto out;
-
- if (arphdr->ar_pro != htons(ETH_P_IP))
- goto out;
-
- if (arphdr->ar_hln != ETH_ALEN)
- goto out;
-
- if (arphdr->ar_pln != 4)
- goto out;
-
- /* Check for bad reply/request. If the ARP message is not sane, DAT
- * will simply ignore it
- */
- ip_src = batadv_arp_ip_src(skb, hdr_size);
- ip_dst = batadv_arp_ip_dst(skb, hdr_size);
- if (ipv4_is_loopback(ip_src) || ipv4_is_multicast(ip_src) ||
- ipv4_is_loopback(ip_dst) || ipv4_is_multicast(ip_dst))
- goto out;
-
- type = ntohs(arphdr->ar_op);
-out:
- return type;
-}
-
-/* return true if the message has been sent to the dht candidates, false
- * otherwise. In case of true the message has to be enqueued to permit the
- * fallback
- */
-bool batadv_dat_snoop_outgoing_arp_request(struct bat_priv *bat_priv,
- struct sk_buff *skb)
-{
- uint16_t type = 0;
- __be32 ip_dst, ip_src;
- uint8_t *hw_src;
- bool ret = false;
- struct neighbour *n = NULL;
- struct hard_iface *primary_if = NULL;
- struct sk_buff *skb_new;
-
- type = batadv_arp_get_type(bat_priv, skb, 0);
- /* If we get an ARP_REQUEST we have to send the unicast message to the
- * selected DHT candidates
- */
- if (type != ARPOP_REQUEST)
- goto out;
-
- batadv_dbg_arp(bat_priv, skb, type, 0, "Parsing outgoing ARP REQUEST");
-
- ip_src = batadv_arp_ip_src(skb, 0);
- hw_src = batadv_arp_hw_src(skb, 0);
- ip_dst = batadv_arp_ip_dst(skb, 0);
-
- primary_if = batadv_primary_if_get_selected(bat_priv);
- if (!primary_if)
- goto out;
-
- batadv_arp_neigh_update(bat_priv, ip_src, hw_src);
-
- n = neigh_lookup(&arp_tbl, &ip_dst, primary_if->soft_iface);
- /* check if it is a valid neigh entry */
- if (n && (n->nud_state & NUD_CONNECTED)) {
- skb_new = arp_create(ARPOP_REPLY, ETH_P_ARP, ip_src,
- primary_if->soft_iface, ip_dst, hw_src,
- n->ha, hw_src);
- if (!skb_new)
- goto out;
-
- skb_reset_mac_header(skb_new);
- skb_new->protocol = eth_type_trans(skb_new,
- primary_if->soft_iface);
- bat_priv->stats.rx_packets++;
- bat_priv->stats.rx_bytes += skb->len + ETH_HLEN;
- primary_if->soft_iface->last_rx = jiffies;
-
- netif_rx(skb_new);
- batadv_dbg(DBG_DAT, bat_priv, "ARP request replied locally\n");
- } else {
- /* Send the request on the DHT */
- batadv_inc_counter(bat_priv, BAT_CNT_DAT_REQUEST_TX);
- ret = batadv_dht_send_data(bat_priv, skb, ip_dst,
- BAT_P_DAT_DHT_GET);
- }
-out:
- if (n)
- neigh_release(n);
- if (primary_if)
- batadv_hardif_free_ref(primary_if);
- return ret;
-}
-
-/* This function is meant to be invoked for an ARP request which is coming into
- * the bat0 interfaces from the mesh network. It will check for the needed data
- * into the local table. If found, an ARP reply is sent immediately, otherwise
- * the caller has to deliver the ARP request to the upper layer
- */
-bool batadv_dat_snoop_incoming_arp_request(struct bat_priv *bat_priv,
- struct sk_buff *skb, int hdr_size)
-{
- uint16_t type;
- __be32 ip_src, ip_dst;
- uint8_t *hw_src;
- struct hard_iface *primary_if = NULL;
- struct sk_buff *skb_new;
- struct neighbour *n = NULL;
- bool ret = false;
-
- type = batadv_arp_get_type(bat_priv, skb, hdr_size);
- if (type != ARPOP_REQUEST)
- goto out;
-
- hw_src = batadv_arp_hw_src(skb, hdr_size);
- ip_src = batadv_arp_ip_src(skb, hdr_size);
- ip_dst = batadv_arp_ip_dst(skb, hdr_size);
-
- batadv_dbg_arp(bat_priv, skb, type, hdr_size,
- "Parsing incoming ARP REQUEST");
-
- primary_if = batadv_primary_if_get_selected(bat_priv);
- if (!primary_if)
- goto out;
-
- batadv_arp_neigh_update(bat_priv, ip_src, hw_src);
-
- n = neigh_lookup(&arp_tbl, &ip_dst, primary_if->soft_iface);
- /* check if it is a valid neigh entry */
- if (!n || !(n->nud_state & NUD_CONNECTED))
- goto out;
-
- skb_new = arp_create(ARPOP_REPLY, ETH_P_ARP, ip_src,
- primary_if->soft_iface, ip_dst, hw_src, n->ha,
- hw_src);
-
- if (!skb_new)
- goto out;
-
- batadv_inc_counter(bat_priv, BAT_CNT_DAT_REPLY_TX);
-
- batadv_unicast_4addr_send_skb(skb_new, bat_priv, BAT_P_DAT_CACHE_REPLY);
-
- ret = true;
-out:
- if (n)
- neigh_release(n);
- if (primary_if)
- batadv_hardif_free_ref(primary_if);
- if (ret)
- kfree_skb(skb);
- return ret;
-}
-
-/* This function is meant to be invoked on an ARP reply packet going into the
- * soft interface. The related neighbour entry has to be updated and the DHT has
- * to be populated as well
- */
-bool batadv_dat_snoop_outgoing_arp_reply(struct bat_priv *bat_priv,
- struct sk_buff *skb)
-{
- uint16_t type;
- __be32 ip_src, ip_dst;
- uint8_t *hw_src, *hw_dst;
- bool ret = false;
-
- type = batadv_arp_get_type(bat_priv, skb, 0);
- if (type != ARPOP_REPLY)
- goto out;
-
- batadv_dbg_arp(bat_priv, skb, type, 0, "Parsing outgoing ARP REPLY");
-
- hw_src = batadv_arp_hw_src(skb, 0);
- ip_src = batadv_arp_ip_src(skb, 0);
- hw_dst = batadv_arp_hw_dst(skb, 0);
- ip_dst = batadv_arp_ip_dst(skb, 0);
-
- batadv_arp_neigh_update(bat_priv, ip_src, hw_src);
- batadv_arp_neigh_update(bat_priv, ip_dst, hw_dst);
-
- batadv_inc_counter(bat_priv, BAT_CNT_DAT_REPLY_TX);
-
- /* Send the ARP reply to the candidates for both the IP addresses we
- * fetched from the ARP reply
- */
- batadv_dht_send_data(bat_priv, skb, ip_src, BAT_P_DAT_DHT_PUT);
- batadv_dht_send_data(bat_priv, skb, ip_dst, BAT_P_DAT_DHT_PUT);
- ret = true;
-out:
- return ret;
-}
-
-/* This function has to be invoked on an ARP reply coming into the soft
- * interface from the mesh network. The local table has to be updated
- */
-bool batadv_dat_snoop_incoming_arp_reply(struct bat_priv *bat_priv,
- struct sk_buff *skb, int hdr_size)
-{
- uint16_t type;
- __be32 ip_src, ip_dst;
- uint8_t *hw_src, *hw_dst;
- bool ret = false;
-
- type = batadv_arp_get_type(bat_priv, skb, hdr_size);
- if (type != ARPOP_REPLY)
- goto out;
-
- batadv_dbg_arp(bat_priv, skb, type, hdr_size,
- "Parsing incoming ARP REPLY");
-
- hw_src = batadv_arp_hw_src(skb, hdr_size);
- ip_src = batadv_arp_ip_src(skb, hdr_size);
- hw_dst = batadv_arp_hw_dst(skb, hdr_size);
- ip_dst = batadv_arp_ip_dst(skb, hdr_size);
-
- /* Update our internal cache with both the IP addresses we fetched from
- * the ARP reply
- */
- batadv_arp_neigh_update(bat_priv, ip_src, hw_src);
- batadv_arp_neigh_update(bat_priv, ip_dst, hw_dst);
-
- /* if this REPLY is directed to a client of mine, let's deliver the
- * packet to the interface
- */
- ret = !batadv_is_my_client(bat_priv, hw_dst);
-out:
- /* if ret == false packet has to be delivered to the interface */
- return ret;
-}
-
-bool batadv_dat_drop_broadcast_packet(struct bat_priv *bat_priv,
- struct forw_packet *forw_packet)
-{
- const size_t bcast_len = sizeof(struct bcast_packet);
- struct neighbour *n = NULL;
- uint16_t type;
- bool ret = false;
- __be32 ip_dst;
-
- /* If this packet is an ARP_REQUEST and we already have the information
- * that it is going to ask, we can drop the packet
- */
- if (forw_packet->num_packets)
- goto out;
-
- type = batadv_arp_get_type(bat_priv, forw_packet->skb, bcast_len);
- if (type != ARPOP_REQUEST)
- goto out;
-
- ip_dst = batadv_arp_ip_dst(forw_packet->skb, bcast_len);
- n = neigh_lookup(&arp_tbl, &ip_dst,
- forw_packet->if_incoming->soft_iface);
-
- /* check if we already know this neigh */
- if (!n || !(n->nud_state & NUD_CONNECTED)) {
- batadv_dbg(DBG_DAT, bat_priv,
- "ARP Request for %pI4: fallback\n", &ip_dst);
- goto out;
- }
-
- batadv_dbg(DBG_DAT, bat_priv,
- "ARP Request for %pI4: fallback prevented\n", &ip_dst);
- ret = true;
-
-out:
- if (n)
- neigh_release(n);
- return ret;
-}
-
-void batadv_arp_change_timeout(struct net_device *soft_iface, const char *name)
-{
- struct in_device *in_dev = in_dev_get(soft_iface);
- if (!in_dev) {
- pr_err("Unable to set ARP parameters for the batman interface '%s'\n",
- name);
- return;
- }
-
- /* Introduce a delay in the ARP state-machine transactions. Entries
- * will be kept in the ARP table for the default time multiplied by 4
- */
- in_dev->arp_parms->base_reachable_time *= ARP_TIMEOUT_FACTOR;
- in_dev->arp_parms->gc_staletime *= ARP_TIMEOUT_FACTOR;
- in_dev->arp_parms->reachable_time *= ARP_TIMEOUT_FACTOR;
-
- in_dev_put(in_dev);
-}
deleted file mode 100644
@@ -1,117 +0,0 @@
-/* Copyright (C) 2011-2012 B.A.T.M.A.N. contributors:
- *
- * Antonio Quartulli
- *
- * 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
- */
-
-#ifndef _NET_BATMAN_ADV_ARP_H_
-#define _NET_BATMAN_ADV_ARP_H_
-
-#ifdef CONFIG_BATMAN_ADV_DAT
-
-#include "types.h"
-#include "originator.h"
-
-#include <linux/if_arp.h>
-
-#define DAT_ADDR_MAX ((dat_addr_t)~(dat_addr_t)0)
-
-bool batadv_dat_snoop_outgoing_arp_request(struct bat_priv *bat_priv,
- struct sk_buff *skb);
-bool batadv_dat_snoop_incoming_arp_request(struct bat_priv *bat_priv,
- struct sk_buff *skb, int hdr_size);
-bool batadv_dat_snoop_outgoing_arp_reply(struct bat_priv *bat_priv,
- struct sk_buff *skb);
-bool batadv_dat_snoop_incoming_arp_reply(struct bat_priv *bat_priv,
- struct sk_buff *skb, int hdr_size);
-bool batadv_dat_drop_broadcast_packet(struct bat_priv *bat_priv,
- struct forw_packet *forw_packet);
-void batadv_arp_change_timeout(struct net_device *soft_iface, const char *name);
-
-static inline void
-batadv_dat_init_orig_node_dht_addr(struct orig_node *orig_node)
-{
- uint32_t addr;
-
- addr = batadv_choose_orig(orig_node->orig, DAT_ADDR_MAX);
- orig_node->dht_addr = (dat_addr_t)addr;
-}
-
-static inline void batadv_dat_init_own_dht_addr(struct bat_priv *bat_priv,
- struct hard_iface *primary_if)
-{
- uint32_t addr;
-
- addr = batadv_choose_orig(primary_if->net_dev->dev_addr, DAT_ADDR_MAX);
-
- bat_priv->dht_addr = (dat_addr_t)addr;
-}
-
-#else
-
-static inline bool
-batadv_dat_snoop_outgoing_arp_request(struct bat_priv *bat_priv,
- struct sk_buff *skb)
-{
- return false;
-}
-
-static inline bool
-batadv_dat_snoop_incoming_arp_request(struct bat_priv *bat_priv,
- struct sk_buff *skb, int hdr_size)
-{
- return false;
-}
-
-static inline bool
-batadv_dat_snoop_outgoing_arp_reply(struct bat_priv *bat_priv,
- struct sk_buff *skb)
-{
- return false;
-}
-
-static inline bool
-batadv_dat_snoop_incoming_arp_reply(struct bat_priv *bat_priv,
- struct sk_buff *skb, int hdr_size)
-{
- return false;
-}
-
-static inline bool
-batadv_dat_drop_broadcast_packet(struct bat_priv *bat_priv,
- struct forw_packet *forw_packet)
-{
- return false;
-}
-
-static inline void
-batadv_dat_init_orig_node_dht_addr(struct orig_node *orig_node)
-{
-}
-
-static inline void batadv_dat_init_own_dht_addr(struct bat_priv *bat_priv,
- struct hard_iface *primary_if)
-{
-}
-
-static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
- const char *name)
-{
-}
-
-#endif /* CONFIG_BATMAN_ADV_DAT */
-
-#endif /* _NET_BATMAN_ADV_ARP_H_ */
@@ -38,7 +38,6 @@ gen_config() {
# write config variables
gen_config 'CONFIG_BATMAN_ADV_DEBUG' ${CONFIG_BATMAN_ADV_DEBUG:="n"} >> "${TMP}"
gen_config 'CONFIG_BATMAN_ADV_BLA' ${CONFIG_BATMAN_ADV_BLA:="y"} >> "${TMP}"
-gen_config 'CONFIG_BATMAN_ADV_DAT' ${CONFIG_BATMAN_ADV_DAT:="y"} >> "${TMP}"
# only regenerate compat-autoconf.h when config was changed
diff "${TMP}" "${TARGET}" > /dev/null 2>&1 || cp "${TMP}" "${TARGET}"
@@ -18,7 +18,6 @@
*/
#include "main.h"
-#include "distributed-arp-table.h"
#include "hard-interface.h"
#include "soft-interface.h"
#include "send.h"
@@ -108,8 +107,6 @@ static void batadv_primary_if_update_addr(struct bat_priv *bat_priv,
if (!primary_if)
goto out;
- batadv_dat_init_own_dht_addr(bat_priv, primary_if);
-
vis_packet = (struct vis_packet *)
bat_priv->my_vis_info->skb_packet->data;
memcpy(vis_packet->vis_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
@@ -275,8 +275,6 @@ static void batadv_recv_handler_init(void)
/* batman icmp packet */
batadv_rx_handler[BAT_ICMP] = batadv_recv_icmp_packet;
- /* unicast with 4 addresses packet */
- batadv_rx_handler[BAT_UNICAST_4ADDR] = batadv_recv_unicast_packet;
/* unicast packet */
batadv_rx_handler[BAT_UNICAST] = batadv_recv_unicast_packet;
/* fragmented unicast packet */
@@ -69,15 +69,6 @@
#define NUM_WORDS BITS_TO_LONGS(TQ_LOCAL_WINDOW_SIZE)
-/* msecs after which an ARP_REQUEST is sent in broadcast as fallback */
-#define ARP_REQ_DELAY 250
-/* numbers of originator to contact for any PUT/GET DHT operation */
-#define DHT_CANDIDATES_NUM 3
-/* Factor which default ARP timeout values of the soft_iface table are
- * multiplied by
- */
-#define ARP_TIMEOUT_FACTOR 4
-
#define LOG_BUF_LEN 8192 /* has to be a power of 2 */
#define VIS_INTERVAL 5000 /* 5 seconds */
@@ -124,9 +115,6 @@ enum uev_type {
#define GW_THRESHOLD 50
-#define DHT_CANDIDATE_NOT_FOUND 0
-#define DHT_CANDIDATE_ORIG 1
-
/* Debug Messages */
#ifdef pr_fmt
#undef pr_fmt
@@ -140,8 +128,7 @@ enum dbg_level {
DBG_ROUTES = 1 << 1, /* route added / changed / deleted */
DBG_TT = 1 << 2, /* translation table operations */
DBG_BLA = 1 << 3, /* bridge loop avoidance */
- DBG_DAT = 1 << 4, /* snooped arp messages / dat operations */
- DBG_ALL = 31
+ DBG_ALL = 15
};
/* Kernel headers */
@@ -18,7 +18,6 @@
*/
#include "main.h"
-#include "distributed-arp-table.h"
#include "originator.h"
#include "hash.h"
#include "translation-table.h"
@@ -221,7 +220,6 @@ struct orig_node *batadv_get_orig_node(struct bat_priv *bat_priv,
orig_node->tt_poss_change = false;
orig_node->bat_priv = bat_priv;
memcpy(orig_node->orig, addr, ETH_ALEN);
- batadv_dat_init_orig_node_dht_addr(orig_node);
orig_node->router = NULL;
orig_node->tt_crc = 0;
atomic_set(&orig_node->last_ttvn, 0);
@@ -23,22 +23,14 @@
#define ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */
enum bat_packettype {
- BAT_IV_OGM = 0x01,
- BAT_ICMP = 0x02,
- BAT_UNICAST = 0x03,
- BAT_BCAST = 0x04,
- BAT_VIS = 0x05,
- BAT_UNICAST_FRAG = 0x06,
- BAT_TT_QUERY = 0x07,
- BAT_ROAM_ADV = 0x08,
- BAT_UNICAST_4ADDR = 0x09
-};
-
-enum bat_subtype {
- BAT_P_DATA = 0x01,
- BAT_P_DAT_DHT_GET = 0x02,
- BAT_P_DAT_DHT_PUT = 0x03,
- BAT_P_DAT_CACHE_REPLY = 0x04
+ BAT_IV_OGM = 0x01,
+ BAT_ICMP = 0x02,
+ BAT_UNICAST = 0x03,
+ BAT_BCAST = 0x04,
+ BAT_VIS = 0x05,
+ BAT_UNICAST_FRAG = 0x06,
+ BAT_TT_QUERY = 0x07,
+ BAT_ROAM_ADV = 0x08
};
/* this file is included by batctl which needs these defines */
@@ -168,12 +160,6 @@ struct unicast_packet {
uint8_t dest[ETH_ALEN];
} __packed;
-struct unicast_4addr_packet {
- struct unicast_packet u;
- uint8_t src[ETH_ALEN];
- uint8_t subtype;
-} __packed;
-
struct unicast_frag_packet {
struct batman_header header;
uint8_t ttvn; /* destination translation table version number */
@@ -997,18 +997,14 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
struct unicast_packet *unicast_packet;
int hdr_size = sizeof(*unicast_packet);
- unicast_packet = (struct unicast_packet *)skb->data;
-
- /* the caller function should have already pulled 2 bytes */
- if (unicast_packet->header.packet_type == BAT_UNICAST_4ADDR)
- hdr_size = sizeof(struct unicast_4addr_packet);
-
if (batadv_check_unicast_packet(skb, hdr_size) < 0)
return NET_RX_DROP;
if (!batadv_check_unicast_ttvn(bat_priv, skb))
return NET_RX_DROP;
+ unicast_packet = (struct unicast_packet *)skb->data;
+
/* packet for me */
if (batadv_is_my_mac(unicast_packet->dest)) {
batadv_interface_rx(recv_if->soft_iface, skb, recv_if,
@@ -18,7 +18,6 @@
*/
#include "main.h"
-#include "distributed-arp-table.h"
#include "send.h"
#include "routing.h"
#include "translation-table.h"
@@ -203,9 +202,6 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING)
goto out;
- if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet))
- goto out;
-
/* rebroadcast packet */
rcu_read_lock();
list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
@@ -20,7 +20,6 @@
#include "main.h"
#include "soft-interface.h"
#include "hard-interface.h"
-#include "distributed-arp-table.h"
#include "routing.h"
#include "send.h"
#include "bat_debugfs.h"
@@ -142,7 +141,6 @@ static int batadv_interface_tx(struct sk_buff *skb,
int data_len = skb->len, ret;
short vid __maybe_unused = -1;
bool do_bcast = false;
- unsigned long brd_delay = 1;
if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
goto dropped;
@@ -206,9 +204,6 @@ static int batadv_interface_tx(struct sk_buff *skb,
if (!primary_if)
goto dropped;
- if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
- brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
-
if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
goto dropped;
@@ -229,7 +224,7 @@ static int batadv_interface_tx(struct sk_buff *skb,
bcast_packet->seqno =
htonl(atomic_inc_return(&bat_priv->bcast_seqno));
- batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
+ batadv_add_bcast_packet_to_list(bat_priv, skb, 1);
/* a copy is stored in the bcast list, therefore removing
* the original skb.
@@ -244,8 +239,6 @@ static int batadv_interface_tx(struct sk_buff *skb,
goto dropped;
}
- batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
-
ret = batadv_unicast_send_skb(skb, bat_priv);
if (ret != 0)
goto dropped_freed;
@@ -278,12 +271,6 @@ void batadv_interface_rx(struct net_device *soft_iface,
if (!pskb_may_pull(skb, hdr_size))
goto dropped;
- if (batadv_dat_snoop_incoming_arp_request(bat_priv, skb, hdr_size))
- goto out;
-
- if (batadv_dat_snoop_incoming_arp_reply(bat_priv, skb, hdr_size))
- goto out;
-
skb_pull_rcsum(skb, hdr_size);
skb_reset_mac_header(skb);
@@ -391,8 +378,6 @@ struct net_device *batadv_softif_create(const char *name)
goto free_soft_iface;
}
- batadv_arp_change_timeout(soft_iface, name);
-
bat_priv = netdev_priv(soft_iface);
atomic_set(&bat_priv->aggregated_ogms, 1);
@@ -538,12 +523,6 @@ static const struct {
{ "tt_response_rx" },
{ "tt_roam_adv_tx" },
{ "tt_roam_adv_rx" },
-#ifdef CONFIG_BATMAN_ADV_DAT
- { "dat_request_tx" },
- { "dat_request_rx" },
- { "dat_reply_tx" },
- { "dat_reply_rx" },
-#endif
};
static void batadv_get_strings(struct net_device *dev, uint32_t stringset,
@@ -23,17 +23,6 @@
#include "packet.h"
#include "bitarray.h"
-#ifdef CONFIG_BATMAN_ADV_DAT
-
-/* dat_addr_t is the type used for all DHT addresses. If it is changed,
- * DAT_ADDR_MAX is changed as well.
- *
- * *Please be careful: dat_addr_t must be UNSIGNED*
- */
-typedef uint16_t dat_addr_t;
-
-#endif /* CONFIG_BATMAN_ADV_DAT */
-
#define BAT_HEADER_LEN (ETH_HLEN + \
((sizeof(struct unicast_packet) > sizeof(struct bcast_packet) ? \
sizeof(struct unicast_packet) : \
@@ -73,9 +62,6 @@ struct hard_iface {
struct orig_node {
uint8_t orig[ETH_ALEN];
uint8_t primary_addr[ETH_ALEN];
-#ifdef CONFIG_BATMAN_ADV_DAT
- dat_addr_t dht_addr;
-#endif
struct neigh_node __rcu *router; /* rcu protected pointer */
unsigned long *bcast_own;
uint8_t *bcast_own_sum;
@@ -171,12 +157,6 @@ enum bat_counters {
BAT_CNT_TT_RESPONSE_RX,
BAT_CNT_TT_ROAM_ADV_TX,
BAT_CNT_TT_ROAM_ADV_RX,
-#ifdef CONFIG_BATMAN_ADV_DAT
- BAT_CNT_DAT_REQUEST_TX,
- BAT_CNT_DAT_REQUEST_RX,
- BAT_CNT_DAT_REPLY_TX,
- BAT_CNT_DAT_REPLY_RX,
-#endif
BAT_CNT_NUM,
};
@@ -255,9 +235,6 @@ struct bat_priv {
struct gw_node __rcu *curr_gw; /* rcu protected pointer */
atomic_t gw_reselect;
struct hard_iface __rcu *primary_if; /* rcu protected pointer */
-#ifdef CONFIG_BATMAN_ADV_DAT
- dat_addr_t dht_addr;
-#endif
struct vis_info *my_vis_info;
struct bat_algo_ops *bat_algo_ops;
};
@@ -430,9 +407,4 @@ struct bat_algo_ops {
void (*bat_ogm_emit)(struct forw_packet *forw_packet);
};
-struct dht_candidate {
- int type;
- struct orig_node *orig_node;
-};
-
#endif /* _NET_BATMAN_ADV_TYPES_H_ */
@@ -284,79 +284,13 @@ out:
return ret;
}
-static bool batadv_pull_and_fill_unicast(struct sk_buff *skb, int hdr_size,
- struct orig_node *orig_node)
-{
- struct unicast_packet *unicast_packet;
-
- if (batadv_skb_head_push(skb, hdr_size) < 0)
- return false;
-
- unicast_packet = (struct unicast_packet *)skb->data;
- unicast_packet->header.version = COMPAT_VERSION;
- /* batman packet type: unicast */
- unicast_packet->header.packet_type = BAT_UNICAST;
- /* set unicast ttl */
- unicast_packet->header.ttl = TTL;
- /* copy the destination for faster routing */
- memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
- /* set the destination tt version number */
- unicast_packet->ttvn =
- (uint8_t)atomic_read(&orig_node->last_ttvn);
-
- return true;
-}
-
-static bool batadv_prepare_unicast_packet(struct sk_buff *skb,
- struct orig_node *orig_node)
-{
- return batadv_pull_and_fill_unicast(skb, sizeof(struct unicast_packet),
- orig_node);
-}
-
-bool batadv_prepare_unicast_4addr_packet(struct bat_priv *bat_priv,
- struct sk_buff *skb,
- struct orig_node *orig_node,
- int packet_subtype)
-{
- struct hard_iface *primary_if;
- struct unicast_4addr_packet *unicast_4addr_packet;
- bool ret = false;
-
- primary_if = batadv_primary_if_get_selected(bat_priv);
- if (!primary_if)
- goto out;
-
- /* pull the header space and fill the unicast_packet substructure.
- * We can do that because the first member of the unicast_4addr_packet
- * is of type struct unicast_packet
- */
- if (!batadv_pull_and_fill_unicast(skb, sizeof(*unicast_4addr_packet),
- orig_node))
- goto out;
-
- unicast_4addr_packet = (struct unicast_4addr_packet *)skb->data;
- unicast_4addr_packet->u.header.packet_type = BAT_UNICAST_4ADDR;
- memcpy(unicast_4addr_packet->src, primary_if->net_dev->dev_addr,
- ETH_ALEN);
- unicast_4addr_packet->subtype = packet_subtype;
-
- ret = true;
-out:
- if (primary_if)
- batadv_hardif_free_ref(primary_if);
- return ret;
-}
-
-int batadv_unicast_generic_send_skb(struct sk_buff *skb,
- struct bat_priv *bat_priv,
- int packet_type, int packet_subtype)
+int batadv_unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
+ struct unicast_packet *unicast_packet;
struct orig_node *orig_node;
struct neigh_node *neigh_node;
int data_len = skb->len;
- struct unicast_packet *unicast_packet;
int ret = 1;
/* get routing information */
@@ -371,32 +305,33 @@ int batadv_unicast_generic_send_skb(struct sk_buff *skb,
*/
orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source,
ethhdr->h_dest);
+
find_router:
/* find_router():
* - if orig_node is NULL it returns NULL
* - increases neigh_nodes refcount if found.
*/
neigh_node = batadv_find_router(bat_priv, orig_node, NULL);
+
if (!neigh_node)
goto out;
- switch (packet_type) {
- case BAT_UNICAST:
- batadv_prepare_unicast_packet(skb, orig_node);
- break;
- case BAT_UNICAST_4ADDR:
- batadv_prepare_unicast_4addr_packet(bat_priv, skb, orig_node,
- packet_subtype);
- break;
- default:
- /* this function supports UNICAST and UNICAST_4ADDR only. It
- * should never be invoked with any other packet type
- */
+ if (batadv_skb_head_push(skb, sizeof(*unicast_packet)) < 0)
goto out;
- }
unicast_packet = (struct unicast_packet *)skb->data;
+ unicast_packet->header.version = COMPAT_VERSION;
+ /* batman packet type: unicast */
+ unicast_packet->header.packet_type = BAT_UNICAST;
+ /* set unicast ttl */
+ unicast_packet->header.ttl = TTL;
+ /* copy the destination for faster routing */
+ memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
+ /* set the destination tt version number */
+ unicast_packet->ttvn =
+ (uint8_t)atomic_read(&orig_node->last_ttvn);
+
/* inform the destination node that we are still missing a correct route
* for this client. The destination will receive this packet and will
* try to reroute it because the ttvn contained in the header is less
@@ -405,9 +340,7 @@ find_router:
if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest))
unicast_packet->ttvn = unicast_packet->ttvn - 1;
- /* fragmentation mechanism only works for UNICAST (now) */
- if (packet_type == BAT_UNICAST &&
- atomic_read(&bat_priv->fragmentation) &&
+ if (atomic_read(&bat_priv->fragmentation) &&
data_len + sizeof(*unicast_packet) >
neigh_node->if_incoming->net_dev->mtu) {
/* send frag skb decreases ttl */
@@ -420,6 +353,7 @@ find_router:
batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
ret = 0;
+ goto out;
out:
if (neigh_node)
@@ -28,30 +28,10 @@
int batadv_frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
struct sk_buff **new_skb);
void batadv_frag_list_free(struct list_head *head);
+int batadv_unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
int batadv_frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
struct hard_iface *hard_iface,
const uint8_t dstaddr[]);
-bool batadv_prepare_unicast_4addr_packet(struct bat_priv *bat_priv,
- struct sk_buff *skb,
- struct orig_node *orig_node,
- int packet_subtype);
-int batadv_unicast_generic_send_skb(struct sk_buff *skb,
- struct bat_priv *bat_priv,
- int packet_type, int packet_subtype);
-
-static inline int batadv_unicast_send_skb(struct sk_buff *skb,
- struct bat_priv *bat_priv)
-{
- return batadv_unicast_generic_send_skb(skb, bat_priv, BAT_UNICAST, 0);
-}
-
-static inline int batadv_unicast_4addr_send_skb(struct sk_buff *skb,
- struct bat_priv *bat_priv,
- int packet_subtype)
-{
- return batadv_unicast_generic_send_skb(skb, bat_priv, BAT_UNICAST_4ADDR,
- packet_subtype);
-}
static inline int batadv_frag_can_reassemble(const struct sk_buff *skb, int mtu)
{