For some reasons (bridge forward delay, network device setup order, etc) the initial bridge loop avoidance announcement packets may be lost. This may lead to problems in finding other backbone gws, and therfore create loops in the startup time. Fix this by extending the waiting periods to 3 (define can be changed) before allowing broadcast traffic. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
524 lines
15 KiB
C
524 lines
15 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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#ifndef _NET_BATMAN_ADV_TYPES_H_
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#define _NET_BATMAN_ADV_TYPES_H_
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#include "packet.h"
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#include "bitarray.h"
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#include <linux/kernel.h>
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#define BATADV_HEADER_LEN \
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(ETH_HLEN + max(sizeof(struct batadv_unicast_packet), \
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sizeof(struct batadv_bcast_packet)))
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#ifdef CONFIG_BATMAN_ADV_DAT
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/* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed,
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* BATADV_DAT_ADDR_MAX is changed as well.
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*
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* *Please be careful: batadv_dat_addr_t must be UNSIGNED*
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*/
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#define batadv_dat_addr_t uint16_t
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#endif /* CONFIG_BATMAN_ADV_DAT */
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/**
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* struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data
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* @ogm_buff: buffer holding the OGM packet
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* @ogm_buff_len: length of the OGM packet buffer
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* @ogm_seqno: OGM sequence number - used to identify each OGM
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*/
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struct batadv_hard_iface_bat_iv {
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unsigned char *ogm_buff;
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int ogm_buff_len;
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atomic_t ogm_seqno;
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};
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struct batadv_hard_iface {
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struct list_head list;
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int16_t if_num;
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char if_status;
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struct net_device *net_dev;
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atomic_t frag_seqno;
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struct kobject *hardif_obj;
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atomic_t refcount;
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struct packet_type batman_adv_ptype;
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struct net_device *soft_iface;
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struct rcu_head rcu;
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struct batadv_hard_iface_bat_iv bat_iv;
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};
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/**
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* struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
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* @primary_addr: hosts primary interface address
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* @last_seen: when last packet from this node was received
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* @bcast_seqno_reset: time when the broadcast seqno window was reset
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* @batman_seqno_reset: time when the batman seqno window was reset
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* @gw_flags: flags related to gateway class
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* @flags: for now only VIS_SERVER flag
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* @last_real_seqno: last and best known sequence number
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* @last_ttl: ttl of last received packet
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* @last_bcast_seqno: last broadcast sequence number received by this host
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*
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* @candidates: how many candidates are available
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* @selected: next bonding candidate
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*/
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struct batadv_orig_node {
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uint8_t orig[ETH_ALEN];
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uint8_t primary_addr[ETH_ALEN];
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struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
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#ifdef CONFIG_BATMAN_ADV_DAT
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batadv_dat_addr_t dat_addr;
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#endif
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unsigned long *bcast_own;
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uint8_t *bcast_own_sum;
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unsigned long last_seen;
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unsigned long bcast_seqno_reset;
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unsigned long batman_seqno_reset;
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uint8_t gw_flags;
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uint8_t flags;
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atomic_t last_ttvn; /* last seen translation table version number */
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uint16_t tt_crc;
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unsigned char *tt_buff;
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int16_t tt_buff_len;
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spinlock_t tt_buff_lock; /* protects tt_buff */
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atomic_t tt_size;
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bool tt_initialised;
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/* The tt_poss_change flag is used to detect an ongoing roaming phase.
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* If true, then I sent a Roaming_adv to this orig_node and I have to
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* inspect every packet directed to it to check whether it is still
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* the true destination or not. This flag will be reset to false as
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* soon as I receive a new TTVN from this orig_node
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*/
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bool tt_poss_change;
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uint32_t last_real_seqno;
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uint8_t last_ttl;
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DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
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uint32_t last_bcast_seqno;
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struct hlist_head neigh_list;
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struct list_head frag_list;
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spinlock_t neigh_list_lock; /* protects neigh_list and router */
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atomic_t refcount;
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struct rcu_head rcu;
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struct hlist_node hash_entry;
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struct batadv_priv *bat_priv;
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unsigned long last_frag_packet;
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/* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
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* neigh_node->real_bits, neigh_node->real_packet_count
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*/
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spinlock_t ogm_cnt_lock;
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/* bcast_seqno_lock protects bcast_bits, last_bcast_seqno */
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spinlock_t bcast_seqno_lock;
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spinlock_t tt_list_lock; /* protects tt_list */
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atomic_t bond_candidates;
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struct list_head bond_list;
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};
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struct batadv_gw_node {
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struct hlist_node list;
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struct batadv_orig_node *orig_node;
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unsigned long deleted;
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atomic_t refcount;
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struct rcu_head rcu;
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};
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/* batadv_neigh_node
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* @last_seen: when last packet via this neighbor was received
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*/
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struct batadv_neigh_node {
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struct hlist_node list;
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uint8_t addr[ETH_ALEN];
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uint8_t real_packet_count;
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uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
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uint8_t tq_index;
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uint8_t tq_avg;
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uint8_t last_ttl;
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struct list_head bonding_list;
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unsigned long last_seen;
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DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
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atomic_t refcount;
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struct rcu_head rcu;
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struct batadv_orig_node *orig_node;
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struct batadv_hard_iface *if_incoming;
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spinlock_t lq_update_lock; /* protects: tq_recv, tq_index */
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};
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#ifdef CONFIG_BATMAN_ADV_BLA
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struct batadv_bcast_duplist_entry {
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uint8_t orig[ETH_ALEN];
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uint16_t crc;
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unsigned long entrytime;
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};
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#endif
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enum batadv_counters {
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BATADV_CNT_TX,
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BATADV_CNT_TX_BYTES,
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BATADV_CNT_TX_DROPPED,
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BATADV_CNT_RX,
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BATADV_CNT_RX_BYTES,
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BATADV_CNT_FORWARD,
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BATADV_CNT_FORWARD_BYTES,
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BATADV_CNT_MGMT_TX,
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BATADV_CNT_MGMT_TX_BYTES,
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BATADV_CNT_MGMT_RX,
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BATADV_CNT_MGMT_RX_BYTES,
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BATADV_CNT_TT_REQUEST_TX,
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BATADV_CNT_TT_REQUEST_RX,
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BATADV_CNT_TT_RESPONSE_TX,
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BATADV_CNT_TT_RESPONSE_RX,
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BATADV_CNT_TT_ROAM_ADV_TX,
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BATADV_CNT_TT_ROAM_ADV_RX,
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#ifdef CONFIG_BATMAN_ADV_DAT
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BATADV_CNT_DAT_GET_TX,
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BATADV_CNT_DAT_GET_RX,
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BATADV_CNT_DAT_PUT_TX,
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BATADV_CNT_DAT_PUT_RX,
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BATADV_CNT_DAT_CACHED_REPLY_TX,
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#endif
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BATADV_CNT_NUM,
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};
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/**
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* struct batadv_priv_tt - per mesh interface translation table data
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* @vn: translation table version number
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* @local_changes: changes registered in an originator interval
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* @poss_change: Detect an ongoing roaming phase. If true, then this node
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* received a roaming_adv and has to inspect every packet directed to it to
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* check whether it still is the true destination or not. This flag will be
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* reset to false as soon as the this node's ttvn is increased
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* @changes_list: tracks tt local changes within an originator interval
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* @req_list: list of pending tt_requests
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* @local_crc: Checksum of the local table, recomputed before sending a new OGM
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*/
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struct batadv_priv_tt {
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atomic_t vn;
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atomic_t ogm_append_cnt;
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atomic_t local_changes;
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bool poss_change;
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struct list_head changes_list;
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struct batadv_hashtable *local_hash;
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struct batadv_hashtable *global_hash;
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struct list_head req_list;
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struct list_head roam_list;
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spinlock_t changes_list_lock; /* protects changes */
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spinlock_t req_list_lock; /* protects req_list */
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spinlock_t roam_list_lock; /* protects roam_list */
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atomic_t local_entry_num;
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uint16_t local_crc;
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unsigned char *last_changeset;
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int16_t last_changeset_len;
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spinlock_t last_changeset_lock; /* protects last_changeset */
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struct delayed_work work;
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};
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#ifdef CONFIG_BATMAN_ADV_BLA
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struct batadv_priv_bla {
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atomic_t num_requests; /* number of bla requests in flight */
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struct batadv_hashtable *claim_hash;
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struct batadv_hashtable *backbone_hash;
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struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
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int bcast_duplist_curr;
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/* protects bcast_duplist and bcast_duplist_curr */
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spinlock_t bcast_duplist_lock;
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struct batadv_bla_claim_dst claim_dest;
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struct delayed_work work;
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};
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#endif
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struct batadv_priv_gw {
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struct hlist_head list;
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spinlock_t list_lock; /* protects gw_list and curr_gw */
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struct batadv_gw_node __rcu *curr_gw; /* rcu protected pointer */
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atomic_t reselect;
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};
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struct batadv_priv_vis {
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struct list_head send_list;
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struct batadv_hashtable *hash;
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spinlock_t hash_lock; /* protects hash */
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spinlock_t list_lock; /* protects info::recv_list */
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struct delayed_work work;
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struct batadv_vis_info *my_info;
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};
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/**
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* struct batadv_priv_dat - per mesh interface DAT private data
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* @addr: node DAT address
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* @hash: hashtable representing the local ARP cache
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* @work: work queue callback item for cache purging
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*/
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#ifdef CONFIG_BATMAN_ADV_DAT
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struct batadv_priv_dat {
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batadv_dat_addr_t addr;
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struct batadv_hashtable *hash;
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struct delayed_work work;
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};
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#endif
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struct batadv_priv {
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atomic_t mesh_state;
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struct net_device_stats stats;
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uint64_t __percpu *bat_counters; /* Per cpu counters */
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atomic_t aggregated_ogms; /* boolean */
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atomic_t bonding; /* boolean */
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atomic_t fragmentation; /* boolean */
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atomic_t ap_isolation; /* boolean */
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atomic_t bridge_loop_avoidance; /* boolean */
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#ifdef CONFIG_BATMAN_ADV_DAT
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atomic_t distributed_arp_table; /* boolean */
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#endif
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atomic_t vis_mode; /* VIS_TYPE_* */
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atomic_t gw_mode; /* GW_MODE_* */
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atomic_t gw_sel_class; /* uint */
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atomic_t gw_bandwidth; /* gw bandwidth */
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atomic_t orig_interval; /* uint */
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atomic_t hop_penalty; /* uint */
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atomic_t log_level; /* uint */
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atomic_t bcast_seqno;
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atomic_t bcast_queue_left;
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atomic_t batman_queue_left;
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char num_ifaces;
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struct batadv_debug_log *debug_log;
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struct kobject *mesh_obj;
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struct dentry *debug_dir;
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struct hlist_head forw_bat_list;
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struct hlist_head forw_bcast_list;
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struct batadv_hashtable *orig_hash;
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spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
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spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
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struct delayed_work orig_work;
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struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */
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struct batadv_algo_ops *bat_algo_ops;
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#ifdef CONFIG_BATMAN_ADV_BLA
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struct batadv_priv_bla bla;
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#endif
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struct batadv_priv_gw gw;
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struct batadv_priv_tt tt;
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struct batadv_priv_vis vis;
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#ifdef CONFIG_BATMAN_ADV_DAT
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struct batadv_priv_dat dat;
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#endif
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};
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struct batadv_socket_client {
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struct list_head queue_list;
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unsigned int queue_len;
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unsigned char index;
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spinlock_t lock; /* protects queue_list, queue_len, index */
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wait_queue_head_t queue_wait;
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struct batadv_priv *bat_priv;
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};
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struct batadv_socket_packet {
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struct list_head list;
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size_t icmp_len;
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struct batadv_icmp_packet_rr icmp_packet;
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};
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struct batadv_tt_common_entry {
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uint8_t addr[ETH_ALEN];
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struct hlist_node hash_entry;
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uint16_t flags;
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unsigned long added_at;
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atomic_t refcount;
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struct rcu_head rcu;
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};
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struct batadv_tt_local_entry {
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struct batadv_tt_common_entry common;
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unsigned long last_seen;
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};
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struct batadv_tt_global_entry {
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struct batadv_tt_common_entry common;
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struct hlist_head orig_list;
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spinlock_t list_lock; /* protects the list */
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unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
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};
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struct batadv_tt_orig_list_entry {
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struct batadv_orig_node *orig_node;
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uint8_t ttvn;
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atomic_t refcount;
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struct rcu_head rcu;
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struct hlist_node list;
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};
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#ifdef CONFIG_BATMAN_ADV_BLA
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struct batadv_backbone_gw {
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uint8_t orig[ETH_ALEN];
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short vid; /* used VLAN ID */
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struct hlist_node hash_entry;
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struct batadv_priv *bat_priv;
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unsigned long lasttime; /* last time we heard of this backbone gw */
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atomic_t wait_periods;
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atomic_t request_sent;
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atomic_t refcount;
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struct rcu_head rcu;
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uint16_t crc; /* crc checksum over all claims */
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};
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struct batadv_claim {
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uint8_t addr[ETH_ALEN];
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short vid;
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struct batadv_backbone_gw *backbone_gw;
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unsigned long lasttime; /* last time we heard of claim (locals only) */
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struct rcu_head rcu;
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atomic_t refcount;
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struct hlist_node hash_entry;
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};
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#endif
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struct batadv_tt_change_node {
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struct list_head list;
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struct batadv_tt_change change;
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};
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struct batadv_tt_req_node {
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uint8_t addr[ETH_ALEN];
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unsigned long issued_at;
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struct list_head list;
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};
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struct batadv_tt_roam_node {
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uint8_t addr[ETH_ALEN];
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atomic_t counter;
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unsigned long first_time;
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struct list_head list;
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};
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/* forw_packet - structure for forw_list maintaining packets to be
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* send/forwarded
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*/
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struct batadv_forw_packet {
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struct hlist_node list;
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unsigned long send_time;
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uint8_t own;
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struct sk_buff *skb;
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uint16_t packet_len;
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uint32_t direct_link_flags;
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uint8_t num_packets;
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struct delayed_work delayed_work;
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struct batadv_hard_iface *if_incoming;
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};
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/* While scanning for vis-entries of a particular vis-originator
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* this list collects its interfaces to create a subgraph/cluster
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* out of them later
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*/
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struct batadv_if_list_entry {
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uint8_t addr[ETH_ALEN];
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bool primary;
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struct hlist_node list;
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};
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struct batadv_debug_log {
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char log_buff[BATADV_LOG_BUF_LEN];
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unsigned long log_start;
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unsigned long log_end;
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spinlock_t lock; /* protects log_buff, log_start and log_end */
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wait_queue_head_t queue_wait;
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};
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struct batadv_frag_packet_list_entry {
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struct list_head list;
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uint16_t seqno;
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struct sk_buff *skb;
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};
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struct batadv_vis_info {
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unsigned long first_seen;
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/* list of server-neighbors we received a vis-packet
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* from. we should not reply to them.
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*/
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struct list_head recv_list;
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struct list_head send_list;
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struct kref refcount;
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struct hlist_node hash_entry;
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struct batadv_priv *bat_priv;
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/* this packet might be part of the vis send queue. */
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struct sk_buff *skb_packet;
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/* vis_info may follow here */
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} __packed;
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struct batadv_vis_info_entry {
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uint8_t src[ETH_ALEN];
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uint8_t dest[ETH_ALEN];
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uint8_t quality; /* quality = 0 client */
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} __packed;
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struct batadv_recvlist_node {
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struct list_head list;
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uint8_t mac[ETH_ALEN];
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};
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struct batadv_algo_ops {
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struct hlist_node list;
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char *name;
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/* init routing info when hard-interface is enabled */
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int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
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/* de-init routing info when hard-interface is disabled */
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void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
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/* (re-)init mac addresses of the protocol information
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* belonging to this hard-interface
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*/
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void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
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/* called when primary interface is selected / changed */
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void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
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/* prepare a new outgoing OGM for the send queue */
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void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
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/* send scheduled OGM */
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void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
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};
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/**
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* struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
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* is used to stored ARP entries needed for the global DAT cache
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* @ip: the IPv4 corresponding to this DAT/ARP entry
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|
* @mac_addr: the MAC address associated to the stored IPv4
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|
* @last_update: time in jiffies when this entry was refreshed last time
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* @hash_entry: hlist node for batadv_priv_dat::hash
|
|
* @refcount: number of contexts the object is used
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|
* @rcu: struct used for freeing in an RCU-safe manner
|
|
*/
|
|
struct batadv_dat_entry {
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__be32 ip;
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uint8_t mac_addr[ETH_ALEN];
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unsigned long last_update;
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|
struct hlist_node hash_entry;
|
|
atomic_t refcount;
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|
struct rcu_head rcu;
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|
};
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|
|
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/**
|
|
* struct batadv_dat_candidate - candidate destination for DAT operations
|
|
* @type: the type of the selected candidate. It can one of the following:
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|
* - BATADV_DAT_CANDIDATE_NOT_FOUND
|
|
* - BATADV_DAT_CANDIDATE_ORIG
|
|
* @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the
|
|
* corresponding originator node structure
|
|
*/
|
|
struct batadv_dat_candidate {
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|
int type;
|
|
struct batadv_orig_node *orig_node;
|
|
};
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|
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#endif /* _NET_BATMAN_ADV_TYPES_H_ */
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