mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-24 18:38:38 +00:00
7c1fd91da5
tt_poss_change is a node-wide flag which tells whether the node is in a roaming state (a client recently moved to/away from it) in order to let it apply special re-routing rules. However this flag does not give a clear idea of the current state because it is not possible to understand *which client* is actually involved in the roaming. For this reason a better approach has been chosen: instead of using a node-wide variable, the roaming state is now given by a per-tt_entry ROAM flag which, in case of packet coming through the node, tells the node whether the real destination is in roaming state or not. With this flag change, batadv_check_unicast_ttvn() has also been rearranged in order to better fit the new re-routing logic and to be much more readable. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
517 lines
15 KiB
C
517 lines
15 KiB
C
/* Copyright (C) 2007-2012 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"
|
|
#include <linux/kernel.h>
|
|
|
|
#define BATADV_HEADER_LEN \
|
|
(ETH_HLEN + max(sizeof(struct batadv_unicast_packet), \
|
|
sizeof(struct batadv_bcast_packet)))
|
|
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
|
|
/* batadv_dat_addr_t is the type used for all DHT addresses. If it is changed,
|
|
* BATADV_DAT_ADDR_MAX is changed as well.
|
|
*
|
|
* *Please be careful: batadv_dat_addr_t must be UNSIGNED*
|
|
*/
|
|
#define batadv_dat_addr_t uint16_t
|
|
|
|
#endif /* CONFIG_BATMAN_ADV_DAT */
|
|
|
|
/**
|
|
* struct batadv_hard_iface_bat_iv - per hard interface B.A.T.M.A.N. IV data
|
|
* @ogm_buff: buffer holding the OGM packet
|
|
* @ogm_buff_len: length of the OGM packet buffer
|
|
* @ogm_seqno: OGM sequence number - used to identify each OGM
|
|
*/
|
|
struct batadv_hard_iface_bat_iv {
|
|
unsigned char *ogm_buff;
|
|
int ogm_buff_len;
|
|
atomic_t ogm_seqno;
|
|
};
|
|
|
|
struct batadv_hard_iface {
|
|
struct list_head list;
|
|
int16_t if_num;
|
|
char if_status;
|
|
struct net_device *net_dev;
|
|
atomic_t frag_seqno;
|
|
struct kobject *hardif_obj;
|
|
atomic_t refcount;
|
|
struct packet_type batman_adv_ptype;
|
|
struct net_device *soft_iface;
|
|
struct rcu_head rcu;
|
|
struct batadv_hard_iface_bat_iv bat_iv;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
|
|
* @primary_addr: hosts primary interface address
|
|
* @last_seen: 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 batadv_orig_node {
|
|
uint8_t orig[ETH_ALEN];
|
|
uint8_t primary_addr[ETH_ALEN];
|
|
struct batadv_neigh_node __rcu *router; /* rcu protected pointer */
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
batadv_dat_addr_t dat_addr;
|
|
#endif
|
|
unsigned long *bcast_own;
|
|
uint8_t *bcast_own_sum;
|
|
unsigned long last_seen;
|
|
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;
|
|
bool tt_initialised;
|
|
uint32_t last_real_seqno;
|
|
uint8_t last_ttl;
|
|
DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
|
|
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 batadv_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 batadv_gw_node {
|
|
struct hlist_node list;
|
|
struct batadv_orig_node *orig_node;
|
|
unsigned long deleted;
|
|
atomic_t refcount;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
/* batadv_neigh_node
|
|
* @last_seen: when last packet via this neighbor was received
|
|
*/
|
|
struct batadv_neigh_node {
|
|
struct hlist_node list;
|
|
uint8_t addr[ETH_ALEN];
|
|
uint8_t real_packet_count;
|
|
uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
|
|
uint8_t tq_index;
|
|
uint8_t tq_avg;
|
|
uint8_t last_ttl;
|
|
struct list_head bonding_list;
|
|
unsigned long last_seen;
|
|
DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
|
|
atomic_t refcount;
|
|
struct rcu_head rcu;
|
|
struct batadv_orig_node *orig_node;
|
|
struct batadv_hard_iface *if_incoming;
|
|
spinlock_t lq_update_lock; /* protects: tq_recv, tq_index */
|
|
};
|
|
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
struct batadv_bcast_duplist_entry {
|
|
uint8_t orig[ETH_ALEN];
|
|
uint16_t crc;
|
|
unsigned long entrytime;
|
|
};
|
|
#endif
|
|
|
|
enum batadv_counters {
|
|
BATADV_CNT_TX,
|
|
BATADV_CNT_TX_BYTES,
|
|
BATADV_CNT_TX_DROPPED,
|
|
BATADV_CNT_RX,
|
|
BATADV_CNT_RX_BYTES,
|
|
BATADV_CNT_FORWARD,
|
|
BATADV_CNT_FORWARD_BYTES,
|
|
BATADV_CNT_MGMT_TX,
|
|
BATADV_CNT_MGMT_TX_BYTES,
|
|
BATADV_CNT_MGMT_RX,
|
|
BATADV_CNT_MGMT_RX_BYTES,
|
|
BATADV_CNT_TT_REQUEST_TX,
|
|
BATADV_CNT_TT_REQUEST_RX,
|
|
BATADV_CNT_TT_RESPONSE_TX,
|
|
BATADV_CNT_TT_RESPONSE_RX,
|
|
BATADV_CNT_TT_ROAM_ADV_TX,
|
|
BATADV_CNT_TT_ROAM_ADV_RX,
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
BATADV_CNT_DAT_GET_TX,
|
|
BATADV_CNT_DAT_GET_RX,
|
|
BATADV_CNT_DAT_PUT_TX,
|
|
BATADV_CNT_DAT_PUT_RX,
|
|
BATADV_CNT_DAT_CACHED_REPLY_TX,
|
|
#endif
|
|
BATADV_CNT_NUM,
|
|
};
|
|
|
|
/**
|
|
* struct batadv_priv_tt - per mesh interface translation table data
|
|
* @vn: translation table version number
|
|
* @local_changes: changes registered in an originator interval
|
|
* @poss_change: Detect an ongoing roaming phase. If true, then this node
|
|
* received a roaming_adv and has to inspect every packet directed to it to
|
|
* check whether it still is the true destination or not. This flag will be
|
|
* reset to false as soon as the this node's ttvn is increased
|
|
* @changes_list: tracks tt local changes within an originator interval
|
|
* @req_list: list of pending tt_requests
|
|
* @local_crc: Checksum of the local table, recomputed before sending a new OGM
|
|
*/
|
|
struct batadv_priv_tt {
|
|
atomic_t vn;
|
|
atomic_t ogm_append_cnt;
|
|
atomic_t local_changes;
|
|
struct list_head changes_list;
|
|
struct batadv_hashtable *local_hash;
|
|
struct batadv_hashtable *global_hash;
|
|
struct list_head req_list;
|
|
struct list_head roam_list;
|
|
spinlock_t changes_list_lock; /* protects changes */
|
|
spinlock_t req_list_lock; /* protects req_list */
|
|
spinlock_t roam_list_lock; /* protects roam_list */
|
|
atomic_t local_entry_num;
|
|
uint16_t local_crc;
|
|
unsigned char *last_changeset;
|
|
int16_t last_changeset_len;
|
|
spinlock_t last_changeset_lock; /* protects last_changeset */
|
|
struct delayed_work work;
|
|
};
|
|
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
struct batadv_priv_bla {
|
|
atomic_t num_requests; /* number of bla requests in flight */
|
|
struct batadv_hashtable *claim_hash;
|
|
struct batadv_hashtable *backbone_hash;
|
|
struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
|
|
int bcast_duplist_curr;
|
|
/* protects bcast_duplist and bcast_duplist_curr */
|
|
spinlock_t bcast_duplist_lock;
|
|
struct batadv_bla_claim_dst claim_dest;
|
|
struct delayed_work work;
|
|
};
|
|
#endif
|
|
|
|
struct batadv_priv_gw {
|
|
struct hlist_head list;
|
|
spinlock_t list_lock; /* protects gw_list and curr_gw */
|
|
struct batadv_gw_node __rcu *curr_gw; /* rcu protected pointer */
|
|
atomic_t reselect;
|
|
};
|
|
|
|
struct batadv_priv_vis {
|
|
struct list_head send_list;
|
|
struct batadv_hashtable *hash;
|
|
spinlock_t hash_lock; /* protects hash */
|
|
spinlock_t list_lock; /* protects info::recv_list */
|
|
struct delayed_work work;
|
|
struct batadv_vis_info *my_info;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_priv_dat - per mesh interface DAT private data
|
|
* @addr: node DAT address
|
|
* @hash: hashtable representing the local ARP cache
|
|
* @work: work queue callback item for cache purging
|
|
*/
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
struct batadv_priv_dat {
|
|
batadv_dat_addr_t addr;
|
|
struct batadv_hashtable *hash;
|
|
struct delayed_work work;
|
|
};
|
|
#endif
|
|
|
|
struct batadv_priv {
|
|
atomic_t mesh_state;
|
|
struct net_device_stats stats;
|
|
uint64_t __percpu *bat_counters; /* Per cpu counters */
|
|
atomic_t aggregated_ogms; /* boolean */
|
|
atomic_t bonding; /* boolean */
|
|
atomic_t fragmentation; /* boolean */
|
|
atomic_t ap_isolation; /* boolean */
|
|
atomic_t bridge_loop_avoidance; /* boolean */
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
atomic_t distributed_arp_table; /* boolean */
|
|
#endif
|
|
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;
|
|
char num_ifaces;
|
|
struct batadv_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 batadv_hashtable *orig_hash;
|
|
spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
|
|
spinlock_t forw_bcast_list_lock; /* protects forw_bcast_list */
|
|
struct delayed_work orig_work;
|
|
struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */
|
|
struct batadv_algo_ops *bat_algo_ops;
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
struct batadv_priv_bla bla;
|
|
#endif
|
|
struct batadv_priv_gw gw;
|
|
struct batadv_priv_tt tt;
|
|
struct batadv_priv_vis vis;
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
struct batadv_priv_dat dat;
|
|
#endif
|
|
};
|
|
|
|
struct batadv_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 batadv_priv *bat_priv;
|
|
};
|
|
|
|
struct batadv_socket_packet {
|
|
struct list_head list;
|
|
size_t icmp_len;
|
|
struct batadv_icmp_packet_rr icmp_packet;
|
|
};
|
|
|
|
struct batadv_tt_common_entry {
|
|
uint8_t addr[ETH_ALEN];
|
|
struct hlist_node hash_entry;
|
|
uint16_t flags;
|
|
unsigned long added_at;
|
|
atomic_t refcount;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
struct batadv_tt_local_entry {
|
|
struct batadv_tt_common_entry common;
|
|
unsigned long last_seen;
|
|
};
|
|
|
|
struct batadv_tt_global_entry {
|
|
struct batadv_tt_common_entry common;
|
|
struct hlist_head orig_list;
|
|
spinlock_t list_lock; /* protects the list */
|
|
unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
|
|
};
|
|
|
|
struct batadv_tt_orig_list_entry {
|
|
struct batadv_orig_node *orig_node;
|
|
uint8_t ttvn;
|
|
atomic_t refcount;
|
|
struct rcu_head rcu;
|
|
struct hlist_node list;
|
|
};
|
|
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
struct batadv_backbone_gw {
|
|
uint8_t orig[ETH_ALEN];
|
|
short vid; /* used VLAN ID */
|
|
struct hlist_node hash_entry;
|
|
struct batadv_priv *bat_priv;
|
|
unsigned long lasttime; /* last time we heard of this backbone gw */
|
|
atomic_t wait_periods;
|
|
atomic_t request_sent;
|
|
atomic_t refcount;
|
|
struct rcu_head rcu;
|
|
uint16_t crc; /* crc checksum over all claims */
|
|
};
|
|
|
|
struct batadv_claim {
|
|
uint8_t addr[ETH_ALEN];
|
|
short vid;
|
|
struct batadv_backbone_gw *backbone_gw;
|
|
unsigned long lasttime; /* last time we heard of claim (locals only) */
|
|
struct rcu_head rcu;
|
|
atomic_t refcount;
|
|
struct hlist_node hash_entry;
|
|
};
|
|
#endif
|
|
|
|
struct batadv_tt_change_node {
|
|
struct list_head list;
|
|
struct batadv_tt_change change;
|
|
};
|
|
|
|
struct batadv_tt_req_node {
|
|
uint8_t addr[ETH_ALEN];
|
|
unsigned long issued_at;
|
|
struct list_head list;
|
|
};
|
|
|
|
struct batadv_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 batadv_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 batadv_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 batadv_if_list_entry {
|
|
uint8_t addr[ETH_ALEN];
|
|
bool primary;
|
|
struct hlist_node list;
|
|
};
|
|
|
|
struct batadv_debug_log {
|
|
char log_buff[BATADV_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 batadv_frag_packet_list_entry {
|
|
struct list_head list;
|
|
uint16_t seqno;
|
|
struct sk_buff *skb;
|
|
};
|
|
|
|
struct batadv_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 batadv_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 batadv_vis_info_entry {
|
|
uint8_t src[ETH_ALEN];
|
|
uint8_t dest[ETH_ALEN];
|
|
uint8_t quality; /* quality = 0 client */
|
|
} __packed;
|
|
|
|
struct batadv_recvlist_node {
|
|
struct list_head list;
|
|
uint8_t mac[ETH_ALEN];
|
|
};
|
|
|
|
struct batadv_algo_ops {
|
|
struct hlist_node list;
|
|
char *name;
|
|
/* init routing info when hard-interface is enabled */
|
|
int (*bat_iface_enable)(struct batadv_hard_iface *hard_iface);
|
|
/* de-init routing info when hard-interface is disabled */
|
|
void (*bat_iface_disable)(struct batadv_hard_iface *hard_iface);
|
|
/* (re-)init mac addresses of the protocol information
|
|
* belonging to this hard-interface
|
|
*/
|
|
void (*bat_iface_update_mac)(struct batadv_hard_iface *hard_iface);
|
|
/* called when primary interface is selected / changed */
|
|
void (*bat_primary_iface_set)(struct batadv_hard_iface *hard_iface);
|
|
/* prepare a new outgoing OGM for the send queue */
|
|
void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface);
|
|
/* send scheduled OGM */
|
|
void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet);
|
|
};
|
|
|
|
/**
|
|
* struct batadv_dat_entry - it is a single entry of batman-adv ARP backend. It
|
|
* is used to stored ARP entries needed for the global DAT cache
|
|
* @ip: the IPv4 corresponding to this DAT/ARP entry
|
|
* @mac_addr: the MAC address associated to the stored IPv4
|
|
* @last_update: time in jiffies when this entry was refreshed last time
|
|
* @hash_entry: hlist node for batadv_priv_dat::hash
|
|
* @refcount: number of contexts the object is used
|
|
* @rcu: struct used for freeing in an RCU-safe manner
|
|
*/
|
|
struct batadv_dat_entry {
|
|
__be32 ip;
|
|
uint8_t mac_addr[ETH_ALEN];
|
|
unsigned long last_update;
|
|
struct hlist_node hash_entry;
|
|
atomic_t refcount;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
/**
|
|
* struct batadv_dat_candidate - candidate destination for DAT operations
|
|
* @type: the type of the selected candidate. It can one of the following:
|
|
* - 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 {
|
|
int type;
|
|
struct batadv_orig_node *orig_node;
|
|
};
|
|
|
|
#endif /* _NET_BATMAN_ADV_TYPES_H_ */
|