/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (C) B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich */ #ifndef _NET_BATMAN_ADV_MAIN_H_ #define _NET_BATMAN_ADV_MAIN_H_ #define BATADV_DRIVER_AUTHOR … #define BATADV_DRIVER_DESC … #define BATADV_DRIVER_DEVICE … #ifndef BATADV_SOURCE_VERSION #define BATADV_SOURCE_VERSION … #endif /* B.A.T.M.A.N. parameters */ #define BATADV_TQ_MAX_VALUE … #define BATADV_THROUGHPUT_MAX_VALUE … #define BATADV_JITTER … /* Time To Live of broadcast messages */ #define BATADV_TTL … /* maximum sequence number age of broadcast messages */ #define BATADV_BCAST_MAX_AGE … /* purge originators after time in seconds if no valid packet comes in * -> TODO: check influence on BATADV_TQ_LOCAL_WINDOW_SIZE */ #define BATADV_PURGE_TIMEOUT … #define BATADV_TT_LOCAL_TIMEOUT … #define BATADV_TT_CLIENT_ROAM_TIMEOUT … #define BATADV_TT_CLIENT_TEMP_TIMEOUT … #define BATADV_TT_WORK_PERIOD … #define BATADV_ORIG_WORK_PERIOD … #define BATADV_MCAST_WORK_PERIOD … #define BATADV_DAT_ENTRY_TIMEOUT … /* sliding packet range of received originator messages in sequence numbers * (should be a multiple of our word size) */ #define BATADV_TQ_LOCAL_WINDOW_SIZE … /* milliseconds we have to keep pending tt_req */ #define BATADV_TT_REQUEST_TIMEOUT … #define BATADV_TQ_GLOBAL_WINDOW_SIZE … #define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM … #define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM … #define BATADV_TQ_TOTAL_BIDRECT_LIMIT … /* B.A.T.M.A.N. V */ #define BATADV_THROUGHPUT_DEFAULT_VALUE … #define BATADV_ELP_PROBES_PER_NODE … #define BATADV_ELP_MIN_PROBE_SIZE … #define BATADV_ELP_PROBE_MAX_TX_DIFF … #define BATADV_ELP_MAX_AGE … #define BATADV_OGM_MAX_ORIGDIFF … #define BATADV_OGM_MAX_AGE … /* number of OGMs sent with the last tt diff */ #define BATADV_TT_OGM_APPEND_MAX … /* Time in which a client can roam at most ROAMING_MAX_COUNT times in * milliseconds */ #define BATADV_ROAMING_MAX_TIME … #define BATADV_ROAMING_MAX_COUNT … #define BATADV_NO_FLAGS … #define BATADV_NULL_IFINDEX … #define BATADV_NO_MARK … /* default interface for multi interface operation. The default interface is * used for communication which originated locally (i.e. is not forwarded) * or where special forwarding is not desired/necessary. */ #define BATADV_IF_DEFAULT … #define BATADV_NUM_WORDS … #define BATADV_LOG_BUF_LEN … /* number of packets to send for broadcasts on different interface types */ #define BATADV_NUM_BCASTS_DEFAULT … #define BATADV_NUM_BCASTS_WIRELESS … /* length of the single packet used by the TP meter */ #define BATADV_TP_PACKET_LEN … /* msecs after which an ARP_REQUEST is sent in broadcast as fallback */ #define ARP_REQ_DELAY … /* numbers of originator to contact for any PUT/GET DHT operation */ #define BATADV_DAT_CANDIDATES_NUM … /* BATADV_TQ_SIMILARITY_THRESHOLD - TQ points that a secondary metric can differ * at most from the primary one in order to be still considered acceptable */ #define BATADV_TQ_SIMILARITY_THRESHOLD … /* should not be bigger than 512 bytes or change the size of * forw_packet->direct_link_flags */ #define BATADV_MAX_AGGREGATION_BYTES … #define BATADV_MAX_AGGREGATION_MS … #define BATADV_BLA_PERIOD_LENGTH … #define BATADV_BLA_BACKBONE_TIMEOUT … #define BATADV_BLA_CLAIM_TIMEOUT … #define BATADV_BLA_WAIT_PERIODS … #define BATADV_BLA_LOOPDETECT_PERIODS … #define BATADV_BLA_LOOPDETECT_TIMEOUT … #define BATADV_DUPLIST_SIZE … #define BATADV_DUPLIST_TIMEOUT … /* don't reset again within 30 seconds */ #define BATADV_RESET_PROTECTION_MS … #define BATADV_EXPECTED_SEQNO_RANGE … #define BATADV_NC_NODE_TIMEOUT … /** * BATADV_TP_MAX_NUM - maximum number of simultaneously active tp sessions */ #define BATADV_TP_MAX_NUM … /** * enum batadv_mesh_state - State of a soft interface */ enum batadv_mesh_state { … }; #define BATADV_BCAST_QUEUE_LEN … #define BATADV_BATMAN_QUEUE_LEN … /** * enum batadv_uev_action - action type of uevent */ enum batadv_uev_action { … }; /** * enum batadv_uev_type - Type of uevent */ enum batadv_uev_type { … }; #define BATADV_GW_THRESHOLD … /* Number of fragment chains for each orig_node */ #define BATADV_FRAG_BUFFER_COUNT … /* Maximum number of fragments for one packet */ #define BATADV_FRAG_MAX_FRAGMENTS … /* Maxumim size of each fragment */ #define BATADV_FRAG_MAX_FRAG_SIZE … /* Time to keep fragments while waiting for rest of the fragments */ #define BATADV_FRAG_TIMEOUT … #define BATADV_DAT_CANDIDATE_NOT_FOUND … #define BATADV_DAT_CANDIDATE_ORIG … /* Debug Messages */ #ifdef pr_fmt #undef pr_fmt #endif /* Append 'batman-adv: ' before kernel messages */ #define pr_fmt(fmt) … /* Kernel headers */ #include <linux/atomic.h> #include <linux/compiler.h> #include <linux/etherdevice.h> #include <linux/if_vlan.h> #include <linux/jiffies.h> #include <linux/netdevice.h> #include <linux/percpu.h> #include <linux/skbuff.h> #include <linux/types.h> #include <uapi/linux/batadv_packet.h> #include "types.h" #include "main.h" /** * batadv_print_vid() - return printable version of vid information * @vid: the VLAN identifier * * Return: -1 when no VLAN is used, VLAN id otherwise */ static inline int batadv_print_vid(unsigned short vid) { … } extern struct list_head batadv_hardif_list; extern unsigned int batadv_hardif_generation; extern unsigned char batadv_broadcast_addr[]; extern struct workqueue_struct *batadv_event_workqueue; int batadv_mesh_init(struct net_device *soft_iface); void batadv_mesh_free(struct net_device *soft_iface); bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr); int batadv_max_header_len(void); void batadv_skb_set_priority(struct sk_buff *skb, int offset); int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev); int batadv_recv_handler_register(u8 packet_type, int (*recv_handler)(struct sk_buff *, struct batadv_hard_iface *)); void batadv_recv_handler_unregister(u8 packet_type); __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr); /** * batadv_compare_eth() - Compare two not u16 aligned Ethernet addresses * @data1: Pointer to a six-byte array containing the Ethernet address * @data2: Pointer other six-byte array containing the Ethernet address * * note: can't use ether_addr_equal() as it requires aligned memory * * Return: true if they are the same ethernet addr */ static inline bool batadv_compare_eth(const void *data1, const void *data2) { … } /** * batadv_has_timed_out() - compares current time (jiffies) and timestamp + * timeout * @timestamp: base value to compare with (in jiffies) * @timeout: added to base value before comparing (in milliseconds) * * Return: true if current time is after timestamp + timeout */ static inline bool batadv_has_timed_out(unsigned long timestamp, unsigned int timeout) { … } /** * batadv_atomic_dec_not_zero() - Decrease unless the number is 0 * @v: pointer of type atomic_t * * Return: non-zero if v was not 0, and zero otherwise. */ #define batadv_atomic_dec_not_zero(v) … /** * batadv_smallest_signed_int() - Returns the smallest signed integer in two's * complement with the sizeof x * @x: type of integer * * Return: smallest signed integer of type */ #define batadv_smallest_signed_int(x) … /** * batadv_seq_before() - Checks if a sequence number x is a predecessor of y * @x: potential predecessor of @y * @y: value to compare @x against * * It handles overflows/underflows and can correctly check for a predecessor * unless the variable sequence number has grown by more than * 2**(bitwidth(x)-1)-1. * * This means that for a u8 with the maximum value 255, it would think: * * * when adding nothing - it is neither a predecessor nor a successor * * before adding more than 127 to the starting value - it is a predecessor, * * when adding 128 - it is neither a predecessor nor a successor, * * after adding more than 127 to the starting value - it is a successor * * Return: true when x is a predecessor of y, false otherwise */ #define batadv_seq_before(x, y) … /** * batadv_seq_after() - Checks if a sequence number x is a successor of y * @x: potential successor of @y * @y: value to compare @x against * * It handles overflows/underflows and can correctly check for a successor * unless the variable sequence number has grown by more than * 2**(bitwidth(x)-1)-1. * * This means that for a u8 with the maximum value 255, it would think: * * * when adding nothing - it is neither a predecessor nor a successor * * before adding more than 127 to the starting value - it is a predecessor, * * when adding 128 - it is neither a predecessor nor a successor, * * after adding more than 127 to the starting value - it is a successor * * Return: true when x is a successor of y, false otherwise */ #define batadv_seq_after(x, y) … /** * batadv_add_counter() - Add to per cpu statistics counter of soft interface * @bat_priv: the bat priv with all the soft interface information * @idx: counter index which should be modified * @count: value to increase counter by * * Stop preemption on local cpu while incrementing the counter */ static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx, size_t count) { … } /** * batadv_inc_counter() - Increase per cpu statistics counter of soft interface * @b: the bat priv with all the soft interface information * @i: counter index which should be modified */ #define batadv_inc_counter(b, i) … /** * BATADV_SKB_CB() - Get batadv_skb_cb from skb control buffer * @__skb: skb holding the control buffer * * The members of the control buffer are defined in struct batadv_skb_cb in * types.h. The macro is inspired by the similar macro TCP_SKB_CB() in tcp.h. * * Return: pointer to the batadv_skb_cb of the skb */ #define BATADV_SKB_CB(__skb) … unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len); bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid); int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type, enum batadv_uev_action action, const char *data); #endif /* _NET_BATMAN_ADV_MAIN_H_ */
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