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Diffstat (limited to 'net/batman-adv/types.h')
| -rw-r--r-- | net/batman-adv/types.h | 2378 |
1 files changed, 2378 insertions, 0 deletions
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h new file mode 100644 index 000000000..76791815b --- /dev/null +++ b/net/batman-adv/types.h @@ -0,0 +1,2378 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + */ + +#ifndef _NET_BATMAN_ADV_TYPES_H_ +#define _NET_BATMAN_ADV_TYPES_H_ + +#ifndef _NET_BATMAN_ADV_MAIN_H_ +#error only "main.h" can be included directly +#endif + +#include <linux/average.h> +#include <linux/bitops.h> +#include <linux/compiler.h> +#include <linux/if.h> +#include <linux/if_ether.h> +#include <linux/kref.h> +#include <linux/mutex.h> +#include <linux/netdevice.h> +#include <linux/netlink.h> +#include <linux/sched.h> /* for linux/wait.h */ +#include <linux/skbuff.h> +#include <linux/spinlock.h> +#include <linux/timer.h> +#include <linux/types.h> +#include <linux/wait.h> +#include <linux/workqueue.h> +#include <uapi/linux/batadv_packet.h> +#include <uapi/linux/batman_adv.h> + +#ifdef CONFIG_BATMAN_ADV_DAT + +/** + * typedef batadv_dat_addr_t - 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* + */ +typedef u16 batadv_dat_addr_t; + +#endif /* CONFIG_BATMAN_ADV_DAT */ + +/** + * enum batadv_dhcp_recipient - dhcp destination + */ +enum batadv_dhcp_recipient { + /** @BATADV_DHCP_NO: packet is not a dhcp message */ + BATADV_DHCP_NO = 0, + + /** @BATADV_DHCP_TO_SERVER: dhcp message is directed to a server */ + BATADV_DHCP_TO_SERVER, + + /** @BATADV_DHCP_TO_CLIENT: dhcp message is directed to a client */ + BATADV_DHCP_TO_CLIENT, +}; + +/** + * BATADV_TT_REMOTE_MASK - bitmask selecting the flags that are sent over the + * wire only + */ +#define BATADV_TT_REMOTE_MASK 0x00FF + +/** + * BATADV_TT_SYNC_MASK - bitmask of the flags that need to be kept in sync + * among the nodes. These flags are used to compute the global/local CRC + */ +#define BATADV_TT_SYNC_MASK 0x00F0 + +/** + * struct batadv_hard_iface_bat_iv - per hard-interface B.A.T.M.A.N. IV data + */ +struct batadv_hard_iface_bat_iv { + /** @ogm_buff: buffer holding the OGM packet */ + unsigned char *ogm_buff; + + /** @ogm_buff_len: length of the OGM packet buffer */ + int ogm_buff_len; + + /** @ogm_seqno: OGM sequence number - used to identify each OGM */ + atomic_t ogm_seqno; + + /** @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len */ + struct mutex ogm_buff_mutex; +}; + +/** + * enum batadv_v_hard_iface_flags - interface flags useful to B.A.T.M.A.N. V + */ +enum batadv_v_hard_iface_flags { + /** + * @BATADV_FULL_DUPLEX: tells if the connection over this link is + * full-duplex + */ + BATADV_FULL_DUPLEX = BIT(0), + + /** + * @BATADV_WARNING_DEFAULT: tells whether we have warned the user that + * no throughput data is available for this interface and that default + * values are assumed. + */ + BATADV_WARNING_DEFAULT = BIT(1), +}; + +/** + * struct batadv_hard_iface_bat_v - per hard-interface B.A.T.M.A.N. V data + */ +struct batadv_hard_iface_bat_v { + /** @elp_interval: time interval between two ELP transmissions */ + atomic_t elp_interval; + + /** @elp_seqno: current ELP sequence number */ + atomic_t elp_seqno; + + /** @elp_skb: base skb containing the ELP message to send */ + struct sk_buff *elp_skb; + + /** @elp_wq: workqueue used to schedule ELP transmissions */ + struct delayed_work elp_wq; + + /** @aggr_wq: workqueue used to transmit queued OGM packets */ + struct delayed_work aggr_wq; + + /** @aggr_list: queue for to be aggregated OGM packets */ + struct sk_buff_head aggr_list; + + /** @aggr_len: size of the OGM aggregate (excluding ethernet header) */ + unsigned int aggr_len; + + /** + * @throughput_override: throughput override to disable link + * auto-detection + */ + atomic_t throughput_override; + + /** @flags: interface specific flags */ + u8 flags; +}; + +/** + * enum batadv_hard_iface_wifi_flags - Flags describing the wifi configuration + * of a batadv_hard_iface + */ +enum batadv_hard_iface_wifi_flags { + /** @BATADV_HARDIF_WIFI_WEXT_DIRECT: it is a wext wifi device */ + BATADV_HARDIF_WIFI_WEXT_DIRECT = BIT(0), + + /** @BATADV_HARDIF_WIFI_CFG80211_DIRECT: it is a cfg80211 wifi device */ + BATADV_HARDIF_WIFI_CFG80211_DIRECT = BIT(1), + + /** + * @BATADV_HARDIF_WIFI_WEXT_INDIRECT: link device is a wext wifi device + */ + BATADV_HARDIF_WIFI_WEXT_INDIRECT = BIT(2), + + /** + * @BATADV_HARDIF_WIFI_CFG80211_INDIRECT: link device is a cfg80211 wifi + * device + */ + BATADV_HARDIF_WIFI_CFG80211_INDIRECT = BIT(3), +}; + +/** + * struct batadv_hard_iface - network device known to batman-adv + */ +struct batadv_hard_iface { + /** @list: list node for batadv_hardif_list */ + struct list_head list; + + /** @if_status: status of the interface for batman-adv */ + char if_status; + + /** + * @num_bcasts: number of payload re-broadcasts on this interface (ARQ) + */ + u8 num_bcasts; + + /** + * @wifi_flags: flags whether this is (directly or indirectly) a wifi + * interface + */ + u32 wifi_flags; + + /** @net_dev: pointer to the net_device */ + struct net_device *net_dev; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** + * @batman_adv_ptype: packet type describing packets that should be + * processed by batman-adv for this interface + */ + struct packet_type batman_adv_ptype; + + /** + * @soft_iface: the batman-adv interface which uses this network + * interface + */ + struct net_device *soft_iface; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; + + /** + * @hop_penalty: penalty which will be applied to the tq-field + * of an OGM received via this interface + */ + atomic_t hop_penalty; + + /** @bat_iv: per hard-interface B.A.T.M.A.N. IV data */ + struct batadv_hard_iface_bat_iv bat_iv; + +#ifdef CONFIG_BATMAN_ADV_BATMAN_V + /** @bat_v: per hard-interface B.A.T.M.A.N. V data */ + struct batadv_hard_iface_bat_v bat_v; +#endif + + /** + * @neigh_list: list of unique single hop neighbors via this interface + */ + struct hlist_head neigh_list; + + /** @neigh_list_lock: lock protecting neigh_list */ + spinlock_t neigh_list_lock; +}; + +/** + * struct batadv_orig_ifinfo_bat_iv - B.A.T.M.A.N. IV private orig_ifinfo + * members + */ +struct batadv_orig_ifinfo_bat_iv { + /** + * @bcast_own: bitfield which counts the number of our OGMs this + * orig_node rebroadcasted "back" to us (relative to last_real_seqno) + */ + DECLARE_BITMAP(bcast_own, BATADV_TQ_LOCAL_WINDOW_SIZE); + + /** @bcast_own_sum: sum of bcast_own */ + u8 bcast_own_sum; +}; + +/** + * struct batadv_orig_ifinfo - originator info per outgoing interface + */ +struct batadv_orig_ifinfo { + /** @list: list node for &batadv_orig_node.ifinfo_list */ + struct hlist_node list; + + /** @if_outgoing: pointer to outgoing hard-interface */ + struct batadv_hard_iface *if_outgoing; + + /** @router: router that should be used to reach this originator */ + struct batadv_neigh_node __rcu *router; + + /** @last_real_seqno: last and best known sequence number */ + u32 last_real_seqno; + + /** @last_ttl: ttl of last received packet */ + u8 last_ttl; + + /** @last_seqno_forwarded: seqno of the OGM which was forwarded last */ + u32 last_seqno_forwarded; + + /** @batman_seqno_reset: time when the batman seqno window was reset */ + unsigned long batman_seqno_reset; + + /** @bat_iv: B.A.T.M.A.N. IV private structure */ + struct batadv_orig_ifinfo_bat_iv bat_iv; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_frag_table_entry - head in the fragment buffer table + */ +struct batadv_frag_table_entry { + /** @fragment_list: head of list with fragments */ + struct hlist_head fragment_list; + + /** @lock: lock to protect the list of fragments */ + spinlock_t lock; + + /** @timestamp: time (jiffie) of last received fragment */ + unsigned long timestamp; + + /** @seqno: sequence number of the fragments in the list */ + u16 seqno; + + /** @size: accumulated size of packets in list */ + u16 size; + + /** @total_size: expected size of the assembled packet */ + u16 total_size; +}; + +/** + * struct batadv_frag_list_entry - entry in a list of fragments + */ +struct batadv_frag_list_entry { + /** @list: list node information */ + struct hlist_node list; + + /** @skb: fragment */ + struct sk_buff *skb; + + /** @no: fragment number in the set */ + u8 no; +}; + +/** + * struct batadv_vlan_tt - VLAN specific TT attributes + */ +struct batadv_vlan_tt { + /** @crc: CRC32 checksum of the entries belonging to this vlan */ + u32 crc; + + /** @num_entries: number of TT entries for this VLAN */ + atomic_t num_entries; +}; + +/** + * struct batadv_orig_node_vlan - VLAN specific data per orig_node + */ +struct batadv_orig_node_vlan { + /** @vid: the VLAN identifier */ + unsigned short vid; + + /** @tt: VLAN specific TT attributes */ + struct batadv_vlan_tt tt; + + /** @list: list node for &batadv_orig_node.vlan_list */ + struct hlist_node list; + + /** + * @refcount: number of context where this object is currently in use + */ + struct kref refcount; + + /** @rcu: struct used for freeing in a RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_orig_bat_iv - B.A.T.M.A.N. IV private orig_node members + */ +struct batadv_orig_bat_iv { + /** + * @ogm_cnt_lock: lock protecting &batadv_orig_ifinfo_bat_iv.bcast_own, + * &batadv_orig_ifinfo_bat_iv.bcast_own_sum, + * &batadv_neigh_ifinfo_bat_iv.bat_iv.real_bits and + * &batadv_neigh_ifinfo_bat_iv.real_packet_count + */ + spinlock_t ogm_cnt_lock; +}; + +/** + * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh + */ +struct batadv_orig_node { + /** @orig: originator ethernet address */ + u8 orig[ETH_ALEN]; + + /** @ifinfo_list: list for routers per outgoing interface */ + struct hlist_head ifinfo_list; + + /** + * @last_bonding_candidate: pointer to last ifinfo of last used router + */ + struct batadv_orig_ifinfo *last_bonding_candidate; + +#ifdef CONFIG_BATMAN_ADV_DAT + /** @dat_addr: address of the orig node in the distributed hash */ + batadv_dat_addr_t dat_addr; +#endif + + /** @last_seen: time when last packet from this node was received */ + unsigned long last_seen; + + /** + * @bcast_seqno_reset: time when the broadcast seqno window was reset + */ + unsigned long bcast_seqno_reset; + +#ifdef CONFIG_BATMAN_ADV_MCAST + /** + * @mcast_handler_lock: synchronizes mcast-capability and -flag changes + */ + spinlock_t mcast_handler_lock; + + /** @mcast_flags: multicast flags announced by the orig node */ + u8 mcast_flags; + + /** + * @mcast_want_all_unsnoopables_node: a list node for the + * mcast.want_all_unsnoopables list + */ + struct hlist_node mcast_want_all_unsnoopables_node; + + /** + * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4 + * list + */ + struct hlist_node mcast_want_all_ipv4_node; + /** + * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6 + * list + */ + struct hlist_node mcast_want_all_ipv6_node; + + /** + * @mcast_want_all_rtr4_node: a list node for the mcast.want_all_rtr4 + * list + */ + struct hlist_node mcast_want_all_rtr4_node; + /** + * @mcast_want_all_rtr6_node: a list node for the mcast.want_all_rtr6 + * list + */ + struct hlist_node mcast_want_all_rtr6_node; +#endif + + /** @capabilities: announced capabilities of this originator */ + unsigned long capabilities; + + /** + * @capa_initialized: bitfield to remember whether a capability was + * initialized + */ + unsigned long capa_initialized; + + /** @last_ttvn: last seen translation table version number */ + atomic_t last_ttvn; + + /** @tt_buff: last tt changeset this node received from the orig node */ + unsigned char *tt_buff; + + /** + * @tt_buff_len: length of the last tt changeset this node received + * from the orig node + */ + s16 tt_buff_len; + + /** @tt_buff_lock: lock that protects tt_buff and tt_buff_len */ + spinlock_t tt_buff_lock; + + /** + * @tt_lock: avoids concurrent read from and write to the table. Table + * update is made up of two operations (data structure update and + * metadata -CRC/TTVN-recalculation) and they have to be executed + * atomically in order to avoid another thread to read the + * table/metadata between those. + */ + spinlock_t tt_lock; + + /** + * @bcast_bits: bitfield containing the info which payload broadcast + * originated from this orig node this host already has seen (relative + * to last_bcast_seqno) + */ + DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); + + /** + * @last_bcast_seqno: last broadcast sequence number received by this + * host + */ + u32 last_bcast_seqno; + + /** + * @neigh_list: list of potential next hop neighbor towards this orig + * node + */ + struct hlist_head neigh_list; + + /** + * @neigh_list_lock: lock protecting neigh_list, ifinfo_list, + * last_bonding_candidate and router + */ + spinlock_t neigh_list_lock; + + /** @hash_entry: hlist node for &batadv_priv.orig_hash */ + struct hlist_node hash_entry; + + /** @bat_priv: pointer to soft_iface this orig node belongs to */ + struct batadv_priv *bat_priv; + + /** @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno */ + spinlock_t bcast_seqno_lock; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; + +#ifdef CONFIG_BATMAN_ADV_NC + /** @in_coding_list: list of nodes this orig can hear */ + struct list_head in_coding_list; + + /** @out_coding_list: list of nodes that can hear this orig */ + struct list_head out_coding_list; + + /** @in_coding_list_lock: protects in_coding_list */ + spinlock_t in_coding_list_lock; + + /** @out_coding_list_lock: protects out_coding_list */ + spinlock_t out_coding_list_lock; +#endif + + /** @fragments: array with heads for fragment chains */ + struct batadv_frag_table_entry fragments[BATADV_FRAG_BUFFER_COUNT]; + + /** + * @vlan_list: a list of orig_node_vlan structs, one per VLAN served by + * the originator represented by this object + */ + struct hlist_head vlan_list; + + /** @vlan_list_lock: lock protecting vlan_list */ + spinlock_t vlan_list_lock; + + /** @bat_iv: B.A.T.M.A.N. IV private structure */ + struct batadv_orig_bat_iv bat_iv; +}; + +/** + * enum batadv_orig_capabilities - orig node capabilities + */ +enum batadv_orig_capabilities { + /** + * @BATADV_ORIG_CAPA_HAS_DAT: orig node has distributed arp table + * enabled + */ + BATADV_ORIG_CAPA_HAS_DAT, + + /** @BATADV_ORIG_CAPA_HAS_NC: orig node has network coding enabled */ + BATADV_ORIG_CAPA_HAS_NC, + + /** @BATADV_ORIG_CAPA_HAS_TT: orig node has tt capability */ + BATADV_ORIG_CAPA_HAS_TT, + + /** + * @BATADV_ORIG_CAPA_HAS_MCAST: orig node has some multicast capability + * (= orig node announces a tvlv of type BATADV_TVLV_MCAST) + */ + BATADV_ORIG_CAPA_HAS_MCAST, +}; + +/** + * struct batadv_gw_node - structure for orig nodes announcing gw capabilities + */ +struct batadv_gw_node { + /** @list: list node for &batadv_priv_gw.list */ + struct hlist_node list; + + /** @orig_node: pointer to corresponding orig node */ + struct batadv_orig_node *orig_node; + + /** @bandwidth_down: advertised uplink download bandwidth */ + u32 bandwidth_down; + + /** @bandwidth_up: advertised uplink upload bandwidth */ + u32 bandwidth_up; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +DECLARE_EWMA(throughput, 10, 8) + +/** + * struct batadv_hardif_neigh_node_bat_v - B.A.T.M.A.N. V private neighbor + * information + */ +struct batadv_hardif_neigh_node_bat_v { + /** @throughput: ewma link throughput towards this neighbor */ + struct ewma_throughput throughput; + + /** @elp_interval: time interval between two ELP transmissions */ + u32 elp_interval; + + /** @elp_latest_seqno: latest and best known ELP sequence number */ + u32 elp_latest_seqno; + + /** + * @last_unicast_tx: when the last unicast packet has been sent to this + * neighbor + */ + unsigned long last_unicast_tx; + + /** @metric_work: work queue callback item for metric update */ + struct work_struct metric_work; +}; + +/** + * struct batadv_hardif_neigh_node - unique neighbor per hard-interface + */ +struct batadv_hardif_neigh_node { + /** @list: list node for &batadv_hard_iface.neigh_list */ + struct hlist_node list; + + /** @addr: the MAC address of the neighboring interface */ + u8 addr[ETH_ALEN]; + + /** + * @orig: the address of the originator this neighbor node belongs to + */ + u8 orig[ETH_ALEN]; + + /** @if_incoming: pointer to incoming hard-interface */ + struct batadv_hard_iface *if_incoming; + + /** @last_seen: when last packet via this neighbor was received */ + unsigned long last_seen; + +#ifdef CONFIG_BATMAN_ADV_BATMAN_V + /** @bat_v: B.A.T.M.A.N. V private data */ + struct batadv_hardif_neigh_node_bat_v bat_v; +#endif + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in a RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_neigh_node - structure for single hops neighbors + */ +struct batadv_neigh_node { + /** @list: list node for &batadv_orig_node.neigh_list */ + struct hlist_node list; + + /** @orig_node: pointer to corresponding orig_node */ + struct batadv_orig_node *orig_node; + + /** @addr: the MAC address of the neighboring interface */ + u8 addr[ETH_ALEN]; + + /** @ifinfo_list: list for routing metrics per outgoing interface */ + struct hlist_head ifinfo_list; + + /** @ifinfo_lock: lock protecting ifinfo_list and its members */ + spinlock_t ifinfo_lock; + + /** @if_incoming: pointer to incoming hard-interface */ + struct batadv_hard_iface *if_incoming; + + /** @last_seen: when last packet via this neighbor was received */ + unsigned long last_seen; + + /** @hardif_neigh: hardif_neigh of this neighbor */ + struct batadv_hardif_neigh_node *hardif_neigh; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_neigh_ifinfo_bat_iv - neighbor information per outgoing + * interface for B.A.T.M.A.N. IV + */ +struct batadv_neigh_ifinfo_bat_iv { + /** @tq_recv: ring buffer of received TQ values from this neigh node */ + u8 tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE]; + + /** @tq_index: ring buffer index */ + u8 tq_index; + + /** + * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv) + */ + u8 tq_avg; + + /** + * @real_bits: bitfield containing the number of OGMs received from this + * neigh node (relative to orig_node->last_real_seqno) + */ + DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); + + /** @real_packet_count: counted result of real_bits */ + u8 real_packet_count; +}; + +/** + * struct batadv_neigh_ifinfo_bat_v - neighbor information per outgoing + * interface for B.A.T.M.A.N. V + */ +struct batadv_neigh_ifinfo_bat_v { + /** + * @throughput: last throughput metric received from originator via this + * neigh + */ + u32 throughput; + + /** @last_seqno: last sequence number known for this neighbor */ + u32 last_seqno; +}; + +/** + * struct batadv_neigh_ifinfo - neighbor information per outgoing interface + */ +struct batadv_neigh_ifinfo { + /** @list: list node for &batadv_neigh_node.ifinfo_list */ + struct hlist_node list; + + /** @if_outgoing: pointer to outgoing hard-interface */ + struct batadv_hard_iface *if_outgoing; + + /** @bat_iv: B.A.T.M.A.N. IV private structure */ + struct batadv_neigh_ifinfo_bat_iv bat_iv; + +#ifdef CONFIG_BATMAN_ADV_BATMAN_V + /** @bat_v: B.A.T.M.A.N. V private data */ + struct batadv_neigh_ifinfo_bat_v bat_v; +#endif + + /** @last_ttl: last received ttl from this neigh node */ + u8 last_ttl; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in a RCU-safe manner */ + struct rcu_head rcu; +}; + +#ifdef CONFIG_BATMAN_ADV_BLA + +/** + * struct batadv_bcast_duplist_entry - structure for LAN broadcast suppression + */ +struct batadv_bcast_duplist_entry { + /** @orig: mac address of orig node originating the broadcast */ + u8 orig[ETH_ALEN]; + + /** @crc: crc32 checksum of broadcast payload */ + __be32 crc; + + /** @entrytime: time when the broadcast packet was received */ + unsigned long entrytime; +}; +#endif + +/** + * enum batadv_counters - indices for traffic counters + */ +enum batadv_counters { + /** @BATADV_CNT_TX: transmitted payload traffic packet counter */ + BATADV_CNT_TX, + + /** @BATADV_CNT_TX_BYTES: transmitted payload traffic bytes counter */ + BATADV_CNT_TX_BYTES, + + /** + * @BATADV_CNT_TX_DROPPED: dropped transmission payload traffic packet + * counter + */ + BATADV_CNT_TX_DROPPED, + + /** @BATADV_CNT_RX: received payload traffic packet counter */ + BATADV_CNT_RX, + + /** @BATADV_CNT_RX_BYTES: received payload traffic bytes counter */ + BATADV_CNT_RX_BYTES, + + /** @BATADV_CNT_FORWARD: forwarded payload traffic packet counter */ + BATADV_CNT_FORWARD, + + /** + * @BATADV_CNT_FORWARD_BYTES: forwarded payload traffic bytes counter + */ + BATADV_CNT_FORWARD_BYTES, + + /** + * @BATADV_CNT_MGMT_TX: transmitted routing protocol traffic packet + * counter + */ + BATADV_CNT_MGMT_TX, + + /** + * @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes + * counter + */ + BATADV_CNT_MGMT_TX_BYTES, + + /** + * @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter + */ + BATADV_CNT_MGMT_RX, + + /** + * @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes + * counter + */ + BATADV_CNT_MGMT_RX_BYTES, + + /** @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter */ + BATADV_CNT_FRAG_TX, + + /** + * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter + */ + BATADV_CNT_FRAG_TX_BYTES, + + /** @BATADV_CNT_FRAG_RX: received fragment traffic packet counter */ + BATADV_CNT_FRAG_RX, + + /** + * @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter + */ + BATADV_CNT_FRAG_RX_BYTES, + + /** @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter */ + BATADV_CNT_FRAG_FWD, + + /** + * @BATADV_CNT_FRAG_FWD_BYTES: forwarded fragment traffic bytes counter + */ + BATADV_CNT_FRAG_FWD_BYTES, + + /** + * @BATADV_CNT_TT_REQUEST_TX: transmitted tt req traffic packet counter + */ + BATADV_CNT_TT_REQUEST_TX, + + /** @BATADV_CNT_TT_REQUEST_RX: received tt req traffic packet counter */ + BATADV_CNT_TT_REQUEST_RX, + + /** + * @BATADV_CNT_TT_RESPONSE_TX: transmitted tt resp traffic packet + * counter + */ + BATADV_CNT_TT_RESPONSE_TX, + + /** + * @BATADV_CNT_TT_RESPONSE_RX: received tt resp traffic packet counter + */ + BATADV_CNT_TT_RESPONSE_RX, + + /** + * @BATADV_CNT_TT_ROAM_ADV_TX: transmitted tt roam traffic packet + * counter + */ + BATADV_CNT_TT_ROAM_ADV_TX, + + /** + * @BATADV_CNT_TT_ROAM_ADV_RX: received tt roam traffic packet counter + */ + BATADV_CNT_TT_ROAM_ADV_RX, + +#ifdef CONFIG_BATMAN_ADV_DAT + /** + * @BATADV_CNT_DAT_GET_TX: transmitted dht GET traffic packet counter + */ + BATADV_CNT_DAT_GET_TX, + + /** @BATADV_CNT_DAT_GET_RX: received dht GET traffic packet counter */ + BATADV_CNT_DAT_GET_RX, + + /** + * @BATADV_CNT_DAT_PUT_TX: transmitted dht PUT traffic packet counter + */ + BATADV_CNT_DAT_PUT_TX, + + /** @BATADV_CNT_DAT_PUT_RX: received dht PUT traffic packet counter */ + BATADV_CNT_DAT_PUT_RX, + + /** + * @BATADV_CNT_DAT_CACHED_REPLY_TX: transmitted dat cache reply traffic + * packet counter + */ + BATADV_CNT_DAT_CACHED_REPLY_TX, +#endif + +#ifdef CONFIG_BATMAN_ADV_NC + /** + * @BATADV_CNT_NC_CODE: transmitted nc-combined traffic packet counter + */ + BATADV_CNT_NC_CODE, + + /** + * @BATADV_CNT_NC_CODE_BYTES: transmitted nc-combined traffic bytes + * counter + */ + BATADV_CNT_NC_CODE_BYTES, + + /** + * @BATADV_CNT_NC_RECODE: transmitted nc-recombined traffic packet + * counter + */ + BATADV_CNT_NC_RECODE, + + /** + * @BATADV_CNT_NC_RECODE_BYTES: transmitted nc-recombined traffic bytes + * counter + */ + BATADV_CNT_NC_RECODE_BYTES, + + /** + * @BATADV_CNT_NC_BUFFER: counter for packets buffered for later nc + * decoding + */ + BATADV_CNT_NC_BUFFER, + + /** + * @BATADV_CNT_NC_DECODE: received and nc-decoded traffic packet counter + */ + BATADV_CNT_NC_DECODE, + + /** + * @BATADV_CNT_NC_DECODE_BYTES: received and nc-decoded traffic bytes + * counter + */ + BATADV_CNT_NC_DECODE_BYTES, + + /** + * @BATADV_CNT_NC_DECODE_FAILED: received and decode-failed traffic + * packet counter + */ + BATADV_CNT_NC_DECODE_FAILED, + + /** + * @BATADV_CNT_NC_SNIFFED: counter for nc-decoded packets received in + * promisc mode. + */ + BATADV_CNT_NC_SNIFFED, +#endif + + /** @BATADV_CNT_NUM: number of traffic counters */ + BATADV_CNT_NUM, +}; + +/** + * struct batadv_priv_tt - per mesh interface translation table data + */ +struct batadv_priv_tt { + /** @vn: translation table version number */ + atomic_t vn; + + /** + * @ogm_append_cnt: counter of number of OGMs containing the local tt + * diff + */ + atomic_t ogm_append_cnt; + + /** @local_changes: changes registered in an originator interval */ + atomic_t local_changes; + + /** + * @changes_list: tracks tt local changes within an originator interval + */ + struct list_head changes_list; + + /** @local_hash: local translation table hash table */ + struct batadv_hashtable *local_hash; + + /** @global_hash: global translation table hash table */ + struct batadv_hashtable *global_hash; + + /** @req_list: list of pending & unanswered tt_requests */ + struct hlist_head req_list; + + /** + * @roam_list: list of the last roaming events of each client limiting + * the number of roaming events to avoid route flapping + */ + struct list_head roam_list; + + /** @changes_list_lock: lock protecting changes_list */ + spinlock_t changes_list_lock; + + /** @req_list_lock: lock protecting req_list */ + spinlock_t req_list_lock; + + /** @roam_list_lock: lock protecting roam_list */ + spinlock_t roam_list_lock; + + /** @last_changeset: last tt changeset this host has generated */ + unsigned char *last_changeset; + + /** + * @last_changeset_len: length of last tt changeset this host has + * generated + */ + s16 last_changeset_len; + + /** + * @last_changeset_lock: lock protecting last_changeset & + * last_changeset_len + */ + spinlock_t last_changeset_lock; + + /** + * @commit_lock: prevents from executing a local TT commit while reading + * the local table. The local TT commit is made up of two operations + * (data structure update and metadata -CRC/TTVN- recalculation) and + * they have to be executed atomically in order to avoid another thread + * to read the table/metadata between those. + */ + spinlock_t commit_lock; + + /** @work: work queue callback item for translation table purging */ + struct delayed_work work; +}; + +#ifdef CONFIG_BATMAN_ADV_BLA + +/** + * struct batadv_priv_bla - per mesh interface bridge loop avoidance data + */ +struct batadv_priv_bla { + /** @num_requests: number of bla requests in flight */ + atomic_t num_requests; + + /** + * @claim_hash: hash table containing mesh nodes this host has claimed + */ + struct batadv_hashtable *claim_hash; + + /** + * @backbone_hash: hash table containing all detected backbone gateways + */ + struct batadv_hashtable *backbone_hash; + + /** @loopdetect_addr: MAC address used for own loopdetection frames */ + u8 loopdetect_addr[ETH_ALEN]; + + /** + * @loopdetect_lasttime: time when the loopdetection frames were sent + */ + unsigned long loopdetect_lasttime; + + /** + * @loopdetect_next: how many periods to wait for the next loopdetect + * process + */ + atomic_t loopdetect_next; + + /** + * @bcast_duplist: recently received broadcast packets array (for + * broadcast duplicate suppression) + */ + struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE]; + + /** + * @bcast_duplist_curr: index of last broadcast packet added to + * bcast_duplist + */ + int bcast_duplist_curr; + + /** + * @bcast_duplist_lock: lock protecting bcast_duplist & + * bcast_duplist_curr + */ + spinlock_t bcast_duplist_lock; + + /** @claim_dest: local claim data (e.g. claim group) */ + struct batadv_bla_claim_dst claim_dest; + + /** @work: work queue callback item for cleanups & bla announcements */ + struct delayed_work work; +}; +#endif + +#ifdef CONFIG_BATMAN_ADV_DEBUG + +/** + * struct batadv_priv_debug_log - debug logging data + */ +struct batadv_priv_debug_log { + /** @log_buff: buffer holding the logs (ring buffer) */ + char log_buff[BATADV_LOG_BUF_LEN]; + + /** @log_start: index of next character to read */ + unsigned long log_start; + + /** @log_end: index of next character to write */ + unsigned long log_end; + + /** @lock: lock protecting log_buff, log_start & log_end */ + spinlock_t lock; + + /** @queue_wait: log reader's wait queue */ + wait_queue_head_t queue_wait; +}; +#endif + +/** + * struct batadv_priv_gw - per mesh interface gateway data + */ +struct batadv_priv_gw { + /** @gateway_list: list of available gateway nodes */ + struct hlist_head gateway_list; + + /** @list_lock: lock protecting gateway_list, curr_gw, generation */ + spinlock_t list_lock; + + /** @curr_gw: pointer to currently selected gateway node */ + struct batadv_gw_node __rcu *curr_gw; + + /** @generation: current (generation) sequence number */ + unsigned int generation; + + /** + * @mode: gateway operation: off, client or server (see batadv_gw_modes) + */ + atomic_t mode; + + /** @sel_class: gateway selection class (applies if gw_mode client) */ + atomic_t sel_class; + + /** + * @bandwidth_down: advertised uplink download bandwidth (if gw_mode + * server) + */ + atomic_t bandwidth_down; + + /** + * @bandwidth_up: advertised uplink upload bandwidth (if gw_mode server) + */ + atomic_t bandwidth_up; + + /** @reselect: bool indicating a gateway re-selection is in progress */ + atomic_t reselect; +}; + +/** + * struct batadv_priv_tvlv - per mesh interface tvlv data + */ +struct batadv_priv_tvlv { + /** + * @container_list: list of registered tvlv containers to be sent with + * each OGM + */ + struct hlist_head container_list; + + /** @handler_list: list of the various tvlv content handlers */ + struct hlist_head handler_list; + + /** @container_list_lock: protects tvlv container list access */ + spinlock_t container_list_lock; + + /** @handler_list_lock: protects handler list access */ + spinlock_t handler_list_lock; +}; + +#ifdef CONFIG_BATMAN_ADV_DAT + +/** + * struct batadv_priv_dat - per mesh interface DAT private data + */ +struct batadv_priv_dat { + /** @addr: node DAT address */ + batadv_dat_addr_t addr; + + /** @hash: hashtable representing the local ARP cache */ + struct batadv_hashtable *hash; + + /** @work: work queue callback item for cache purging */ + struct delayed_work work; +}; +#endif + +#ifdef CONFIG_BATMAN_ADV_MCAST +/** + * struct batadv_mcast_querier_state - IGMP/MLD querier state when bridged + */ +struct batadv_mcast_querier_state { + /** @exists: whether a querier exists in the mesh */ + unsigned char exists:1; + + /** + * @shadowing: if a querier exists, whether it is potentially shadowing + * multicast listeners (i.e. querier is behind our own bridge segment) + */ + unsigned char shadowing:1; +}; + +/** + * struct batadv_mcast_mla_flags - flags for the querier, bridge and tvlv state + */ +struct batadv_mcast_mla_flags { + /** @querier_ipv4: the current state of an IGMP querier in the mesh */ + struct batadv_mcast_querier_state querier_ipv4; + + /** @querier_ipv6: the current state of an MLD querier in the mesh */ + struct batadv_mcast_querier_state querier_ipv6; + + /** @enabled: whether the multicast tvlv is currently enabled */ + unsigned char enabled:1; + + /** @bridged: whether the soft interface has a bridge on top */ + unsigned char bridged:1; + + /** @tvlv_flags: the flags we have last sent in our mcast tvlv */ + u8 tvlv_flags; +}; + +/** + * struct batadv_priv_mcast - per mesh interface mcast data + */ +struct batadv_priv_mcast { + /** + * @mla_list: list of multicast addresses we are currently announcing + * via TT + */ + struct hlist_head mla_list; /* see __batadv_mcast_mla_update() */ + + /** + * @want_all_unsnoopables_list: a list of orig_nodes wanting all + * unsnoopable multicast traffic + */ + struct hlist_head want_all_unsnoopables_list; + + /** + * @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast + * traffic + */ + struct hlist_head want_all_ipv4_list; + + /** + * @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast + * traffic + */ + struct hlist_head want_all_ipv6_list; + + /** + * @want_all_rtr4_list: a list of orig_nodes wanting all routable IPv4 + * multicast traffic + */ + struct hlist_head want_all_rtr4_list; + + /** + * @want_all_rtr6_list: a list of orig_nodes wanting all routable IPv6 + * multicast traffic + */ + struct hlist_head want_all_rtr6_list; + + /** + * @mla_flags: flags for the querier, bridge and tvlv state + */ + struct batadv_mcast_mla_flags mla_flags; + + /** + * @mla_lock: a lock protecting mla_list and mla_flags + */ + spinlock_t mla_lock; + + /** + * @num_want_all_unsnoopables: number of nodes wanting unsnoopable IP + * traffic + */ + atomic_t num_want_all_unsnoopables; + + /** @num_want_all_ipv4: counter for items in want_all_ipv4_list */ + atomic_t num_want_all_ipv4; + + /** @num_want_all_ipv6: counter for items in want_all_ipv6_list */ + atomic_t num_want_all_ipv6; + + /** @num_want_all_rtr4: counter for items in want_all_rtr4_list */ + atomic_t num_want_all_rtr4; + + /** @num_want_all_rtr6: counter for items in want_all_rtr6_list */ + atomic_t num_want_all_rtr6; + + /** + * @want_lists_lock: lock for protecting modifications to mcasts + * want_all_{unsnoopables,ipv4,ipv6}_list (traversals are rcu-locked) + */ + spinlock_t want_lists_lock; + + /** @work: work queue callback item for multicast TT and TVLV updates */ + struct delayed_work work; +}; +#endif + +/** + * struct batadv_priv_nc - per mesh interface network coding private data + */ +struct batadv_priv_nc { + /** @work: work queue callback item for cleanup */ + struct delayed_work work; + + /** + * @min_tq: only consider neighbors for encoding if neigh_tq > min_tq + */ + u8 min_tq; + + /** + * @max_fwd_delay: maximum packet forward delay to allow coding of + * packets + */ + u32 max_fwd_delay; + + /** + * @max_buffer_time: buffer time for sniffed packets used to decoding + */ + u32 max_buffer_time; + + /** + * @timestamp_fwd_flush: timestamp of last forward packet queue flush + */ + unsigned long timestamp_fwd_flush; + + /** + * @timestamp_sniffed_purge: timestamp of last sniffed packet queue + * purge + */ + unsigned long timestamp_sniffed_purge; + + /** + * @coding_hash: Hash table used to buffer skbs while waiting for + * another incoming skb to code it with. Skbs are added to the buffer + * just before being forwarded in routing.c + */ + struct batadv_hashtable *coding_hash; + + /** + * @decoding_hash: Hash table used to buffer skbs that might be needed + * to decode a received coded skb. The buffer is used for 1) skbs + * arriving on the soft-interface; 2) skbs overheard on the + * hard-interface; and 3) skbs forwarded by batman-adv. + */ + struct batadv_hashtable *decoding_hash; +}; + +/** + * struct batadv_tp_unacked - unacked packet meta-information + * + * This struct is supposed to represent a buffer unacked packet. However, since + * the purpose of the TP meter is to count the traffic only, there is no need to + * store the entire sk_buff, the starting offset and the length are enough + */ +struct batadv_tp_unacked { + /** @seqno: seqno of the unacked packet */ + u32 seqno; + + /** @len: length of the packet */ + u16 len; + + /** @list: list node for &batadv_tp_vars.unacked_list */ + struct list_head list; +}; + +/** + * enum batadv_tp_meter_role - Modus in tp meter session + */ +enum batadv_tp_meter_role { + /** @BATADV_TP_RECEIVER: Initialized as receiver */ + BATADV_TP_RECEIVER, + + /** @BATADV_TP_SENDER: Initialized as sender */ + BATADV_TP_SENDER +}; + +/** + * struct batadv_tp_vars - tp meter private variables per session + */ +struct batadv_tp_vars { + /** @list: list node for &bat_priv.tp_list */ + struct hlist_node list; + + /** @timer: timer for ack (receiver) and retry (sender) */ + struct timer_list timer; + + /** @bat_priv: pointer to the mesh object */ + struct batadv_priv *bat_priv; + + /** @start_time: start time in jiffies */ + unsigned long start_time; + + /** @other_end: mac address of remote */ + u8 other_end[ETH_ALEN]; + + /** @role: receiver/sender modi */ + enum batadv_tp_meter_role role; + + /** @sending: sending binary semaphore: 1 if sending, 0 is not */ + atomic_t sending; + + /** @reason: reason for a stopped session */ + enum batadv_tp_meter_reason reason; + + /** @finish_work: work item for the finishing procedure */ + struct delayed_work finish_work; + + /** @test_length: test length in milliseconds */ + u32 test_length; + + /** @session: TP session identifier */ + u8 session[2]; + + /** @icmp_uid: local ICMP "socket" index */ + u8 icmp_uid; + + /* sender variables */ + + /** @dec_cwnd: decimal part of the cwnd used during linear growth */ + u16 dec_cwnd; + + /** @cwnd: current size of the congestion window */ + u32 cwnd; + + /** @cwnd_lock: lock do protect @cwnd & @dec_cwnd */ + spinlock_t cwnd_lock; + + /** + * @ss_threshold: Slow Start threshold. Once cwnd exceeds this value the + * connection switches to the Congestion Avoidance state + */ + u32 ss_threshold; + + /** @last_acked: last acked byte */ + atomic_t last_acked; + + /** @last_sent: last sent byte, not yet acked */ + u32 last_sent; + + /** @tot_sent: amount of data sent/ACKed so far */ + atomic64_t tot_sent; + + /** @dup_acks: duplicate ACKs counter */ + atomic_t dup_acks; + + /** @fast_recovery: true if in Fast Recovery mode */ + unsigned char fast_recovery:1; + + /** @recover: last sent seqno when entering Fast Recovery */ + u32 recover; + + /** @rto: sender timeout */ + u32 rto; + + /** @srtt: smoothed RTT scaled by 2^3 */ + u32 srtt; + + /** @rttvar: RTT variation scaled by 2^2 */ + u32 rttvar; + + /** + * @more_bytes: waiting queue anchor when waiting for more ack/retry + * timeout + */ + wait_queue_head_t more_bytes; + + /** @prerandom_offset: offset inside the prerandom buffer */ + u32 prerandom_offset; + + /** @prerandom_lock: spinlock protecting access to prerandom_offset */ + spinlock_t prerandom_lock; + + /* receiver variables */ + + /** @last_recv: last in-order received packet */ + u32 last_recv; + + /** @unacked_list: list of unacked packets (meta-info only) */ + struct list_head unacked_list; + + /** @unacked_lock: protect unacked_list */ + spinlock_t unacked_lock; + + /** @last_recv_time: time (jiffies) a msg was received */ + unsigned long last_recv_time; + + /** @refcount: number of context where the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_softif_vlan - per VLAN attributes set + */ +struct batadv_softif_vlan { + /** @bat_priv: pointer to the mesh object */ + struct batadv_priv *bat_priv; + + /** @vid: VLAN identifier */ + unsigned short vid; + + /** @ap_isolation: AP isolation state */ + atomic_t ap_isolation; /* boolean */ + + /** @tt: TT private attributes (VLAN specific) */ + struct batadv_vlan_tt tt; + + /** @list: list node for &bat_priv.softif_vlan_list */ + struct hlist_node list; + + /** + * @refcount: number of context where this object is currently in use + */ + struct kref refcount; + + /** @rcu: struct used for freeing in a RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_priv_bat_v - B.A.T.M.A.N. V per soft-interface private data + */ +struct batadv_priv_bat_v { + /** @ogm_buff: buffer holding the OGM packet */ + unsigned char *ogm_buff; + + /** @ogm_buff_len: length of the OGM packet buffer */ + int ogm_buff_len; + + /** @ogm_seqno: OGM sequence number - used to identify each OGM */ + atomic_t ogm_seqno; + + /** @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len */ + struct mutex ogm_buff_mutex; + + /** @ogm_wq: workqueue used to schedule OGM transmissions */ + struct delayed_work ogm_wq; +}; + +/** + * struct batadv_priv - per mesh interface data + */ +struct batadv_priv { + /** + * @mesh_state: current status of the mesh + * (inactive/active/deactivating) + */ + atomic_t mesh_state; + + /** @soft_iface: net device which holds this struct as private data */ + struct net_device *soft_iface; + + /** + * @mtu_set_by_user: MTU was set once by user + * protected by rtnl_lock + */ + int mtu_set_by_user; + + /** + * @bat_counters: mesh internal traffic statistic counters (see + * batadv_counters) + */ + u64 __percpu *bat_counters; /* Per cpu counters */ + + /** + * @aggregated_ogms: bool indicating whether OGM aggregation is enabled + */ + atomic_t aggregated_ogms; + + /** @bonding: bool indicating whether traffic bonding is enabled */ + atomic_t bonding; + + /** + * @fragmentation: bool indicating whether traffic fragmentation is + * enabled + */ + atomic_t fragmentation; + + /** + * @packet_size_max: max packet size that can be transmitted via + * multiple fragmented skbs or a single frame if fragmentation is + * disabled + */ + atomic_t packet_size_max; + + /** + * @frag_seqno: incremental counter to identify chains of egress + * fragments + */ + atomic_t frag_seqno; + +#ifdef CONFIG_BATMAN_ADV_BLA + /** + * @bridge_loop_avoidance: bool indicating whether bridge loop + * avoidance is enabled + */ + atomic_t bridge_loop_avoidance; +#endif + +#ifdef CONFIG_BATMAN_ADV_DAT + /** + * @distributed_arp_table: bool indicating whether distributed ARP table + * is enabled + */ + atomic_t distributed_arp_table; +#endif + +#ifdef CONFIG_BATMAN_ADV_MCAST + /** + * @multicast_mode: Enable or disable multicast optimizations on this + * node's sender/originating side + */ + atomic_t multicast_mode; + + /** + * @multicast_fanout: Maximum number of packet copies to generate for a + * multicast-to-unicast conversion + */ + atomic_t multicast_fanout; +#endif + + /** @orig_interval: OGM broadcast interval in milliseconds */ + atomic_t orig_interval; + + /** + * @hop_penalty: penalty which will be applied to an OGM's tq-field on + * every hop + */ + atomic_t hop_penalty; + +#ifdef CONFIG_BATMAN_ADV_DEBUG + /** @log_level: configured log level (see batadv_dbg_level) */ + atomic_t log_level; +#endif + + /** + * @isolation_mark: the skb->mark value used to match packets for AP + * isolation + */ + u32 isolation_mark; + + /** + * @isolation_mark_mask: bitmask identifying the bits in skb->mark to be + * used for the isolation mark + */ + u32 isolation_mark_mask; + + /** @bcast_seqno: last sent broadcast packet sequence number */ + atomic_t bcast_seqno; + + /** + * @bcast_queue_left: number of remaining buffered broadcast packet + * slots + */ + atomic_t bcast_queue_left; + + /** @batman_queue_left: number of remaining OGM packet slots */ + atomic_t batman_queue_left; + + /** @forw_bat_list: list of aggregated OGMs that will be forwarded */ + struct hlist_head forw_bat_list; + + /** + * @forw_bcast_list: list of broadcast packets that will be + * rebroadcasted + */ + struct hlist_head forw_bcast_list; + + /** @tp_list: list of tp sessions */ + struct hlist_head tp_list; + + /** @orig_hash: hash table containing mesh participants (orig nodes) */ + struct batadv_hashtable *orig_hash; + + /** @forw_bat_list_lock: lock protecting forw_bat_list */ + spinlock_t forw_bat_list_lock; + + /** @forw_bcast_list_lock: lock protecting forw_bcast_list */ + spinlock_t forw_bcast_list_lock; + + /** @tp_list_lock: spinlock protecting @tp_list */ + spinlock_t tp_list_lock; + + /** @tp_num: number of currently active tp sessions */ + atomic_t tp_num; + + /** @orig_work: work queue callback item for orig node purging */ + struct delayed_work orig_work; + + /** + * @primary_if: one of the hard-interfaces assigned to this mesh + * interface becomes the primary interface + */ + struct batadv_hard_iface __rcu *primary_if; /* rcu protected pointer */ + + /** @algo_ops: routing algorithm used by this mesh interface */ + struct batadv_algo_ops *algo_ops; + + /** + * @softif_vlan_list: a list of softif_vlan structs, one per VLAN + * created on top of the mesh interface represented by this object + */ + struct hlist_head softif_vlan_list; + + /** @softif_vlan_list_lock: lock protecting softif_vlan_list */ + spinlock_t softif_vlan_list_lock; + +#ifdef CONFIG_BATMAN_ADV_BLA + /** @bla: bridge loop avoidance data */ + struct batadv_priv_bla bla; +#endif + +#ifdef CONFIG_BATMAN_ADV_DEBUG + /** @debug_log: holding debug logging relevant data */ + struct batadv_priv_debug_log *debug_log; +#endif + + /** @gw: gateway data */ + struct batadv_priv_gw gw; + + /** @tt: translation table data */ + struct batadv_priv_tt tt; + + /** @tvlv: type-version-length-value data */ + struct batadv_priv_tvlv tvlv; + +#ifdef CONFIG_BATMAN_ADV_DAT + /** @dat: distributed arp table data */ + struct batadv_priv_dat dat; +#endif + +#ifdef CONFIG_BATMAN_ADV_MCAST + /** @mcast: multicast data */ + struct batadv_priv_mcast mcast; +#endif + +#ifdef CONFIG_BATMAN_ADV_NC + /** + * @network_coding: bool indicating whether network coding is enabled + */ + atomic_t network_coding; + + /** @nc: network coding data */ + struct batadv_priv_nc nc; +#endif /* CONFIG_BATMAN_ADV_NC */ + +#ifdef CONFIG_BATMAN_ADV_BATMAN_V + /** @bat_v: B.A.T.M.A.N. V per soft-interface private data */ + struct batadv_priv_bat_v bat_v; +#endif +}; + +#ifdef CONFIG_BATMAN_ADV_BLA + +/** + * struct batadv_bla_backbone_gw - batman-adv gateway bridged into the LAN + */ +struct batadv_bla_backbone_gw { + /** + * @orig: originator address of backbone node (mac address of primary + * iface) + */ + u8 orig[ETH_ALEN]; + + /** @vid: vlan id this gateway was detected on */ + unsigned short vid; + + /** @hash_entry: hlist node for &batadv_priv_bla.backbone_hash */ + struct hlist_node hash_entry; + + /** @bat_priv: pointer to soft_iface this backbone gateway belongs to */ + struct batadv_priv *bat_priv; + + /** @lasttime: last time we heard of this backbone gw */ + unsigned long lasttime; + + /** + * @wait_periods: grace time for bridge forward delays and bla group + * forming at bootup phase - no bcast traffic is formwared until it has + * elapsed + */ + atomic_t wait_periods; + + /** + * @request_sent: if this bool is set to true we are out of sync with + * this backbone gateway - no bcast traffic is formwared until the + * situation was resolved + */ + atomic_t request_sent; + + /** @crc: crc16 checksum over all claims */ + u16 crc; + + /** @crc_lock: lock protecting crc */ + spinlock_t crc_lock; + + /** @report_work: work struct for reporting detected loops */ + struct work_struct report_work; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_bla_claim - claimed non-mesh client structure + */ +struct batadv_bla_claim { + /** @addr: mac address of claimed non-mesh client */ + u8 addr[ETH_ALEN]; + + /** @vid: vlan id this client was detected on */ + unsigned short vid; + + /** @backbone_gw: pointer to backbone gw claiming this client */ + struct batadv_bla_backbone_gw *backbone_gw; + + /** @backbone_lock: lock protecting backbone_gw pointer */ + spinlock_t backbone_lock; + + /** @lasttime: last time we heard of claim (locals only) */ + unsigned long lasttime; + + /** @hash_entry: hlist node for &batadv_priv_bla.claim_hash */ + struct hlist_node hash_entry; + + /** @refcount: number of contexts the object is used */ + struct rcu_head rcu; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct kref refcount; +}; +#endif + +/** + * struct batadv_tt_common_entry - tt local & tt global common data + */ +struct batadv_tt_common_entry { + /** @addr: mac address of non-mesh client */ + u8 addr[ETH_ALEN]; + + /** @vid: VLAN identifier */ + unsigned short vid; + + /** + * @hash_entry: hlist node for &batadv_priv_tt.local_hash or for + * &batadv_priv_tt.global_hash + */ + struct hlist_node hash_entry; + + /** @flags: various state handling flags (see batadv_tt_client_flags) */ + u16 flags; + + /** @added_at: timestamp used for purging stale tt common entries */ + unsigned long added_at; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_tt_local_entry - translation table local entry data + */ +struct batadv_tt_local_entry { + /** @common: general translation table data */ + struct batadv_tt_common_entry common; + + /** @last_seen: timestamp used for purging stale tt local entries */ + unsigned long last_seen; + + /** @vlan: soft-interface vlan of the entry */ + struct batadv_softif_vlan *vlan; +}; + +/** + * struct batadv_tt_global_entry - translation table global entry data + */ +struct batadv_tt_global_entry { + /** @common: general translation table data */ + struct batadv_tt_common_entry common; + + /** @orig_list: list of orig nodes announcing this non-mesh client */ + struct hlist_head orig_list; + + /** @orig_list_count: number of items in the orig_list */ + atomic_t orig_list_count; + + /** @list_lock: lock protecting orig_list */ + spinlock_t list_lock; + + /** @roam_at: time at which TT_GLOBAL_ROAM was set */ + unsigned long roam_at; +}; + +/** + * struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client + */ +struct batadv_tt_orig_list_entry { + /** @orig_node: pointer to orig node announcing this non-mesh client */ + struct batadv_orig_node *orig_node; + + /** + * @ttvn: translation table version number which added the non-mesh + * client + */ + u8 ttvn; + + /** @flags: per orig entry TT sync flags */ + u8 flags; + + /** @list: list node for &batadv_tt_global_entry.orig_list */ + struct hlist_node list; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_tt_change_node - structure for tt changes occurred + */ +struct batadv_tt_change_node { + /** @list: list node for &batadv_priv_tt.changes_list */ + struct list_head list; + + /** @change: holds the actual translation table diff data */ + struct batadv_tvlv_tt_change change; +}; + +/** + * struct batadv_tt_req_node - data to keep track of the tt requests in flight + */ +struct batadv_tt_req_node { + /** + * @addr: mac address of the originator this request was sent to + */ + u8 addr[ETH_ALEN]; + + /** @issued_at: timestamp used for purging stale tt requests */ + unsigned long issued_at; + + /** @refcount: number of contexts the object is used by */ + struct kref refcount; + + /** @list: list node for &batadv_priv_tt.req_list */ + struct hlist_node list; +}; + +/** + * struct batadv_tt_roam_node - roaming client data + */ +struct batadv_tt_roam_node { + /** @addr: mac address of the client in the roaming phase */ + u8 addr[ETH_ALEN]; + + /** + * @counter: number of allowed roaming events per client within a single + * OGM interval (changes are committed with each OGM) + */ + atomic_t counter; + + /** + * @first_time: timestamp used for purging stale roaming node entries + */ + unsigned long first_time; + + /** @list: list node for &batadv_priv_tt.roam_list */ + struct list_head list; +}; + +/** + * struct batadv_nc_node - network coding node + */ +struct batadv_nc_node { + /** @list: next and prev pointer for the list handling */ + struct list_head list; + + /** @addr: the node's mac address */ + u8 addr[ETH_ALEN]; + + /** @refcount: number of contexts the object is used by */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; + + /** @orig_node: pointer to corresponding orig node struct */ + struct batadv_orig_node *orig_node; + + /** @last_seen: timestamp of last ogm received from this node */ + unsigned long last_seen; +}; + +/** + * struct batadv_nc_path - network coding path + */ +struct batadv_nc_path { + /** @hash_entry: next and prev pointer for the list handling */ + struct hlist_node hash_entry; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; + + /** @refcount: number of contexts the object is used by */ + struct kref refcount; + + /** @packet_list: list of buffered packets for this path */ + struct list_head packet_list; + + /** @packet_list_lock: access lock for packet list */ + spinlock_t packet_list_lock; + + /** @next_hop: next hop (destination) of path */ + u8 next_hop[ETH_ALEN]; + + /** @prev_hop: previous hop (source) of path */ + u8 prev_hop[ETH_ALEN]; + + /** @last_valid: timestamp for last validation of path */ + unsigned long last_valid; +}; + +/** + * struct batadv_nc_packet - network coding packet used when coding and + * decoding packets + */ +struct batadv_nc_packet { + /** @list: next and prev pointer for the list handling */ + struct list_head list; + + /** @packet_id: crc32 checksum of skb data */ + __be32 packet_id; + + /** + * @timestamp: field containing the info when the packet was added to + * path + */ + unsigned long timestamp; + + /** @neigh_node: pointer to original next hop neighbor of skb */ + struct batadv_neigh_node *neigh_node; + + /** @skb: skb which can be encoded or used for decoding */ + struct sk_buff *skb; + + /** @nc_path: pointer to path this nc packet is attached to */ + struct batadv_nc_path *nc_path; +}; + +/** + * struct batadv_skb_cb - control buffer structure used to store private data + * relevant to batman-adv in the skb->cb buffer in skbs. + */ +struct batadv_skb_cb { + /** + * @decoded: Marks a skb as decoded, which is checked when searching for + * coding opportunities in network-coding.c + */ + unsigned char decoded:1; + + /** @num_bcasts: Counter for broadcast packet retransmissions */ + unsigned char num_bcasts; +}; + +/** + * struct batadv_forw_packet - structure for bcast packets to be sent/forwarded + */ +struct batadv_forw_packet { + /** + * @list: list node for &batadv_priv.forw.bcast_list and + * &batadv_priv.forw.bat_list + */ + struct hlist_node list; + + /** @cleanup_list: list node for purging functions */ + struct hlist_node cleanup_list; + + /** @send_time: execution time for delayed_work (packet sending) */ + unsigned long send_time; + + /** + * @own: bool for locally generated packets (local OGMs are re-scheduled + * after sending) + */ + u8 own; + + /** @skb: bcast packet's skb buffer */ + struct sk_buff *skb; + + /** @packet_len: size of aggregated OGM packet inside the skb buffer */ + u16 packet_len; + + /** @direct_link_flags: direct link flags for aggregated OGM packets */ + u32 direct_link_flags; + + /** @num_packets: counter for aggregated OGMv1 packets */ + u8 num_packets; + + /** @delayed_work: work queue callback item for packet sending */ + struct delayed_work delayed_work; + + /** + * @if_incoming: pointer to incoming hard-iface or primary iface if + * locally generated packet + */ + struct batadv_hard_iface *if_incoming; + + /** + * @if_outgoing: packet where the packet should be sent to, or NULL if + * unspecified + */ + struct batadv_hard_iface *if_outgoing; + + /** @queue_left: The queue (counter) this packet was applied to */ + atomic_t *queue_left; +}; + +/** + * struct batadv_algo_iface_ops - mesh algorithm callbacks (interface specific) + */ +struct batadv_algo_iface_ops { + /** + * @activate: start routing mechanisms when hard-interface is brought up + * (optional) + */ + void (*activate)(struct batadv_hard_iface *hard_iface); + + /** @enable: init routing info when hard-interface is enabled */ + int (*enable)(struct batadv_hard_iface *hard_iface); + + /** @enabled: notification when hard-interface was enabled (optional) */ + void (*enabled)(struct batadv_hard_iface *hard_iface); + + /** @disable: de-init routing info when hard-interface is disabled */ + void (*disable)(struct batadv_hard_iface *hard_iface); + + /** + * @update_mac: (re-)init mac addresses of the protocol information + * belonging to this hard-interface + */ + void (*update_mac)(struct batadv_hard_iface *hard_iface); + + /** @primary_set: called when primary interface is selected / changed */ + void (*primary_set)(struct batadv_hard_iface *hard_iface); +}; + +/** + * struct batadv_algo_neigh_ops - mesh algorithm callbacks (neighbour specific) + */ +struct batadv_algo_neigh_ops { + /** @hardif_init: called on creation of single hop entry (optional) */ + void (*hardif_init)(struct batadv_hardif_neigh_node *neigh); + + /** + * @cmp: compare the metrics of two neighbors for their respective + * outgoing interfaces + */ + int (*cmp)(struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2); + + /** + * @is_similar_or_better: check if neigh1 is equally similar or better + * than neigh2 for their respective outgoing interface from the metric + * prospective + */ + bool (*is_similar_or_better)(struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2); + + /** @dump: dump neighbors to a netlink socket (optional) */ + void (*dump)(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *priv, + struct batadv_hard_iface *hard_iface); +}; + +/** + * struct batadv_algo_orig_ops - mesh algorithm callbacks (originator specific) + */ +struct batadv_algo_orig_ops { + /** @dump: dump originators to a netlink socket (optional) */ + void (*dump)(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *priv, + struct batadv_hard_iface *hard_iface); +}; + +/** + * struct batadv_algo_gw_ops - mesh algorithm callbacks (GW specific) + */ +struct batadv_algo_gw_ops { + /** @init_sel_class: initialize GW selection class (optional) */ + void (*init_sel_class)(struct batadv_priv *bat_priv); + + /** + * @store_sel_class: parse and stores a new GW selection class + * (optional) + */ + ssize_t (*store_sel_class)(struct batadv_priv *bat_priv, char *buff, + size_t count); + /** + * @get_best_gw_node: select the best GW from the list of available + * nodes (optional) + */ + struct batadv_gw_node *(*get_best_gw_node) + (struct batadv_priv *bat_priv); + + /** + * @is_eligible: check if a newly discovered GW is a potential candidate + * for the election as best GW (optional) + */ + bool (*is_eligible)(struct batadv_priv *bat_priv, + struct batadv_orig_node *curr_gw_orig, + struct batadv_orig_node *orig_node); + + /** @dump: dump gateways to a netlink socket (optional) */ + void (*dump)(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *priv); +}; + +/** + * struct batadv_algo_ops - mesh algorithm callbacks + */ +struct batadv_algo_ops { + /** @list: list node for the batadv_algo_list */ + struct hlist_node list; + + /** @name: name of the algorithm */ + char *name; + + /** @iface: callbacks related to interface handling */ + struct batadv_algo_iface_ops iface; + + /** @neigh: callbacks related to neighbors handling */ + struct batadv_algo_neigh_ops neigh; + + /** @orig: callbacks related to originators handling */ + struct batadv_algo_orig_ops orig; + + /** @gw: callbacks related to GW mode */ + struct batadv_algo_gw_ops gw; +}; + +/** + * 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 + */ +struct batadv_dat_entry { + /** @ip: the IPv4 corresponding to this DAT/ARP entry */ + __be32 ip; + + /** @mac_addr: the MAC address associated to the stored IPv4 */ + u8 mac_addr[ETH_ALEN]; + + /** @vid: the vlan ID associated to this entry */ + unsigned short vid; + + /** + * @last_update: time in jiffies when this entry was refreshed last time + */ + unsigned long last_update; + + /** @hash_entry: hlist node for &batadv_priv_dat.hash */ + struct hlist_node hash_entry; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * struct batadv_hw_addr - a list entry for a MAC address + */ +struct batadv_hw_addr { + /** @list: list node for the linking of entries */ + struct hlist_node list; + + /** @addr: the MAC address of this list entry */ + unsigned char addr[ETH_ALEN]; +}; + +/** + * struct batadv_dat_candidate - candidate destination for DAT operations + */ +struct batadv_dat_candidate { + /** + * @type: the type of the selected candidate. It can one of the + * following: + * - BATADV_DAT_CANDIDATE_NOT_FOUND + * - BATADV_DAT_CANDIDATE_ORIG + */ + int type; + + /** + * @orig_node: if type is BATADV_DAT_CANDIDATE_ORIG this field points to + * the corresponding originator node structure + */ + struct batadv_orig_node *orig_node; +}; + +/** + * struct batadv_tvlv_container - container for tvlv appended to OGMs + */ +struct batadv_tvlv_container { + /** @list: hlist node for &batadv_priv_tvlv.container_list */ + struct hlist_node list; + + /** @tvlv_hdr: tvlv header information needed to construct the tvlv */ + struct batadv_tvlv_hdr tvlv_hdr; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; +}; + +/** + * struct batadv_tvlv_handler - handler for specific tvlv type and version + */ +struct batadv_tvlv_handler { + /** @list: hlist node for &batadv_priv_tvlv.handler_list */ + struct hlist_node list; + + /** + * @ogm_handler: handler callback which is given the tvlv payload to + * process on incoming OGM packets + */ + void (*ogm_handler)(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + u8 flags, void *tvlv_value, u16 tvlv_value_len); + + /** + * @unicast_handler: handler callback which is given the tvlv payload to + * process on incoming unicast tvlv packets + */ + int (*unicast_handler)(struct batadv_priv *bat_priv, + u8 *src, u8 *dst, + void *tvlv_value, u16 tvlv_value_len); + + /** @type: tvlv type this handler feels responsible for */ + u8 type; + + /** @version: tvlv version this handler feels responsible for */ + u8 version; + + /** @flags: tvlv handler flags */ + u8 flags; + + /** @refcount: number of contexts the object is used */ + struct kref refcount; + + /** @rcu: struct used for freeing in an RCU-safe manner */ + struct rcu_head rcu; +}; + +/** + * enum batadv_tvlv_handler_flags - tvlv handler flags definitions + */ +enum batadv_tvlv_handler_flags { + /** + * @BATADV_TVLV_HANDLER_OGM_CIFNOTFND: tvlv ogm processing function + * will call this handler even if its type was not found (with no data) + */ + BATADV_TVLV_HANDLER_OGM_CIFNOTFND = BIT(1), + + /** + * @BATADV_TVLV_HANDLER_OGM_CALLED: interval tvlv handling flag - the + * API marks a handler as being called, so it won't be called if the + * BATADV_TVLV_HANDLER_OGM_CIFNOTFND flag was set + */ + BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2), +}; + +#endif /* _NET_BATMAN_ADV_TYPES_H_ */ |