linux/net/batman-adv/types.h
Antonio Quartulli 48100bac89 batman-adv: create a common substructure for tt_global/local_entry
Several functions in the translation table management code assume that the
tt_global_entry and tt_local_entry structures have the same initial fields such
as 'addr' and 'hash_entry'. To improve the code readability and to avoid
mistakes in later changes, a common substructure that substitute the shared
fields has been introduced (struct tt_common_entry).

Thanks to this modification, it has also been possible to slightly reduce the
code length by merging some functions like compare_ltt/gtt() and
tt_local/global_hash_find()

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-11-20 13:08:35 +01:00

346 lines
9.8 KiB
C

/*
* Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
*
* Marek Lindner, Simon Wunderlich
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*
*/
#ifndef _NET_BATMAN_ADV_TYPES_H_
#define _NET_BATMAN_ADV_TYPES_H_
#include "packet.h"
#include "bitarray.h"
#define BAT_HEADER_LEN (sizeof(struct ethhdr) + \
((sizeof(struct unicast_packet) > sizeof(struct bcast_packet) ? \
sizeof(struct unicast_packet) : \
sizeof(struct bcast_packet))))
struct hard_iface {
struct list_head list;
int16_t if_num;
char if_status;
struct net_device *net_dev;
atomic_t seqno;
atomic_t frag_seqno;
unsigned char *packet_buff;
int packet_len;
struct kobject *hardif_obj;
atomic_t refcount;
struct packet_type batman_adv_ptype;
struct net_device *soft_iface;
struct rcu_head rcu;
};
/**
* orig_node - structure for orig_list maintaining nodes of mesh
* @primary_addr: hosts primary interface address
* @last_valid: when last packet from this node was received
* @bcast_seqno_reset: time when the broadcast seqno window was reset
* @batman_seqno_reset: time when the batman seqno window was reset
* @gw_flags: flags related to gateway class
* @flags: for now only VIS_SERVER flag
* @last_real_seqno: last and best known sequence number
* @last_ttl: ttl of last received packet
* @last_bcast_seqno: last broadcast sequence number received by this host
*
* @candidates: how many candidates are available
* @selected: next bonding candidate
*/
struct orig_node {
uint8_t orig[ETH_ALEN];
uint8_t primary_addr[ETH_ALEN];
struct neigh_node __rcu *router; /* rcu protected pointer */
unsigned long *bcast_own;
uint8_t *bcast_own_sum;
unsigned long last_valid;
unsigned long bcast_seqno_reset;
unsigned long batman_seqno_reset;
uint8_t gw_flags;
uint8_t flags;
atomic_t last_ttvn; /* last seen translation table version number */
uint16_t tt_crc;
unsigned char *tt_buff;
int16_t tt_buff_len;
spinlock_t tt_buff_lock; /* protects tt_buff */
atomic_t tt_size;
/* The tt_poss_change flag is used to detect an ongoing roaming phase.
* If true, then I sent a Roaming_adv to this orig_node and I have to
* inspect every packet directed to it to check whether it is still
* the true destination or not. This flag will be reset to false as
* soon as I receive a new TTVN from this orig_node */
bool tt_poss_change;
uint32_t last_real_seqno;
uint8_t last_ttl;
unsigned long bcast_bits[NUM_WORDS];
uint32_t last_bcast_seqno;
struct hlist_head neigh_list;
struct list_head frag_list;
spinlock_t neigh_list_lock; /* protects neigh_list and router */
atomic_t refcount;
struct rcu_head rcu;
struct hlist_node hash_entry;
struct bat_priv *bat_priv;
unsigned long last_frag_packet;
/* ogm_cnt_lock protects: bcast_own, bcast_own_sum,
* neigh_node->real_bits, neigh_node->real_packet_count */
spinlock_t ogm_cnt_lock;
/* bcast_seqno_lock protects bcast_bits, last_bcast_seqno */
spinlock_t bcast_seqno_lock;
spinlock_t tt_list_lock; /* protects tt_list */
atomic_t bond_candidates;
struct list_head bond_list;
};
struct gw_node {
struct hlist_node list;
struct orig_node *orig_node;
unsigned long deleted;
atomic_t refcount;
struct rcu_head rcu;
};
/**
* neigh_node
* @last_valid: when last packet via this neighbor was received
*/
struct neigh_node {
struct hlist_node list;
uint8_t addr[ETH_ALEN];
uint8_t real_packet_count;
uint8_t tq_recv[TQ_GLOBAL_WINDOW_SIZE];
uint8_t tq_index;
uint8_t tq_avg;
uint8_t last_ttl;
struct list_head bonding_list;
unsigned long last_valid;
unsigned long real_bits[NUM_WORDS];
atomic_t refcount;
struct rcu_head rcu;
struct orig_node *orig_node;
struct hard_iface *if_incoming;
spinlock_t tq_lock; /* protects: tq_recv, tq_index */
};
struct bat_priv {
atomic_t mesh_state;
struct net_device_stats stats;
atomic_t aggregated_ogms; /* boolean */
atomic_t bonding; /* boolean */
atomic_t fragmentation; /* boolean */
atomic_t ap_isolation; /* boolean */
atomic_t vis_mode; /* VIS_TYPE_* */
atomic_t gw_mode; /* GW_MODE_* */
atomic_t gw_sel_class; /* uint */
atomic_t gw_bandwidth; /* gw bandwidth */
atomic_t orig_interval; /* uint */
atomic_t hop_penalty; /* uint */
atomic_t log_level; /* uint */
atomic_t bcast_seqno;
atomic_t bcast_queue_left;
atomic_t batman_queue_left;
atomic_t ttvn; /* translation table version number */
atomic_t tt_ogm_append_cnt;
atomic_t tt_local_changes; /* changes registered in a OGM interval */
/* The tt_poss_change flag is used to detect an ongoing roaming phase.
* If true, then I received a Roaming_adv and I have to inspect every
* packet directed to me to check whether I am still the true
* destination or not. This flag will be reset to false as soon as I
* increase my TTVN */
bool tt_poss_change;
char num_ifaces;
struct debug_log *debug_log;
struct kobject *mesh_obj;
struct dentry *debug_dir;
struct hlist_head forw_bat_list;
struct hlist_head forw_bcast_list;
struct hlist_head gw_list;
struct hlist_head softif_neigh_vids;
struct list_head tt_changes_list; /* tracks changes in a OGM int */
struct list_head vis_send_list;
struct hashtable_t *orig_hash;
struct hashtable_t *tt_local_hash;
struct hashtable_t *tt_global_hash;
struct list_head tt_req_list; /* list of pending tt_requests */
struct list_head tt_roam_list;
struct hashtable_t *vis_hash;
spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
spinlock_t forw_bcast_list_lock; /* protects */
spinlock_t tt_changes_list_lock; /* protects tt_changes */
spinlock_t tt_req_list_lock; /* protects tt_req_list */
spinlock_t tt_roam_list_lock; /* protects tt_roam_list */
spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
spinlock_t vis_hash_lock; /* protects vis_hash */
spinlock_t vis_list_lock; /* protects vis_info::recv_list */
spinlock_t softif_neigh_lock; /* protects soft-interface neigh list */
spinlock_t softif_neigh_vid_lock; /* protects soft-interface vid list */
atomic_t num_local_tt;
/* Checksum of the local table, recomputed before sending a new OGM */
atomic_t tt_crc;
unsigned char *tt_buff;
int16_t tt_buff_len;
spinlock_t tt_buff_lock; /* protects tt_buff */
struct delayed_work tt_work;
struct delayed_work orig_work;
struct delayed_work vis_work;
struct gw_node __rcu *curr_gw; /* rcu protected pointer */
atomic_t gw_reselect;
struct hard_iface __rcu *primary_if; /* rcu protected pointer */
struct vis_info *my_vis_info;
};
struct socket_client {
struct list_head queue_list;
unsigned int queue_len;
unsigned char index;
spinlock_t lock; /* protects queue_list, queue_len, index */
wait_queue_head_t queue_wait;
struct bat_priv *bat_priv;
};
struct socket_packet {
struct list_head list;
size_t icmp_len;
struct icmp_packet_rr icmp_packet;
};
struct tt_common_entry {
uint8_t addr[ETH_ALEN];
struct hlist_node hash_entry;
uint16_t flags;
atomic_t refcount;
struct rcu_head rcu;
};
struct tt_local_entry {
struct tt_common_entry common;
unsigned long last_seen;
};
struct tt_global_entry {
struct tt_common_entry common;
struct orig_node *orig_node;
uint8_t ttvn;
unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
};
struct tt_change_node {
struct list_head list;
struct tt_change change;
};
struct tt_req_node {
uint8_t addr[ETH_ALEN];
unsigned long issued_at;
struct list_head list;
};
struct tt_roam_node {
uint8_t addr[ETH_ALEN];
atomic_t counter;
unsigned long first_time;
struct list_head list;
};
/**
* forw_packet - structure for forw_list maintaining packets to be
* send/forwarded
*/
struct forw_packet {
struct hlist_node list;
unsigned long send_time;
uint8_t own;
struct sk_buff *skb;
uint16_t packet_len;
uint32_t direct_link_flags;
uint8_t num_packets;
struct delayed_work delayed_work;
struct hard_iface *if_incoming;
};
/* While scanning for vis-entries of a particular vis-originator
* this list collects its interfaces to create a subgraph/cluster
* out of them later
*/
struct if_list_entry {
uint8_t addr[ETH_ALEN];
bool primary;
struct hlist_node list;
};
struct debug_log {
char log_buff[LOG_BUF_LEN];
unsigned long log_start;
unsigned long log_end;
spinlock_t lock; /* protects log_buff, log_start and log_end */
wait_queue_head_t queue_wait;
};
struct frag_packet_list_entry {
struct list_head list;
uint16_t seqno;
struct sk_buff *skb;
};
struct vis_info {
unsigned long first_seen;
/* list of server-neighbors we received a vis-packet
* from. we should not reply to them. */
struct list_head recv_list;
struct list_head send_list;
struct kref refcount;
struct hlist_node hash_entry;
struct bat_priv *bat_priv;
/* this packet might be part of the vis send queue. */
struct sk_buff *skb_packet;
/* vis_info may follow here*/
} __packed;
struct vis_info_entry {
uint8_t src[ETH_ALEN];
uint8_t dest[ETH_ALEN];
uint8_t quality; /* quality = 0 client */
} __packed;
struct recvlist_node {
struct list_head list;
uint8_t mac[ETH_ALEN];
};
struct softif_neigh_vid {
struct hlist_node list;
struct bat_priv *bat_priv;
short vid;
atomic_t refcount;
struct softif_neigh __rcu *softif_neigh;
struct rcu_head rcu;
struct hlist_head softif_neigh_list;
};
struct softif_neigh {
struct hlist_node list;
uint8_t addr[ETH_ALEN];
unsigned long last_seen;
atomic_t refcount;
struct rcu_head rcu;
};
#endif /* _NET_BATMAN_ADV_TYPES_H_ */