517 lines
15 KiB
C
517 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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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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__be32 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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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
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* @refcount: number of contexts the object is used
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* @rcu: struct used for freeing in an RCU-safe manner
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*/
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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;
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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
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* @type: the type of the selected candidate. It can one of the following:
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* - BATADV_DAT_CANDIDATE_NOT_FOUND
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* - BATADV_DAT_CANDIDATE_ORIG
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* @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to the
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* corresponding originator node structure
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*/
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struct batadv_dat_candidate {
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int type;
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struct batadv_orig_node *orig_node;
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};
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#endif /* _NET_BATMAN_ADV_TYPES_H_ */
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