/* Copyright (C) 2007-2017 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, see <http://www.gnu.org/licenses/>. */ #ifndef _NET_BATMAN_ADV_MAIN_H_ #define _NET_BATMAN_ADV_MAIN_H_ #define BATADV_DRIVER_AUTHOR "Marek Lindner <mareklindner@neomailbox.ch>, " \ "Simon Wunderlich <sw@simonwunderlich.de>" #define BATADV_DRIVER_DESC "B.A.T.M.A.N. advanced" #define BATADV_DRIVER_DEVICE "batman-adv" #ifndef BATADV_SOURCE_VERSION #define BATADV_SOURCE_VERSION "2017.0" #endif /* B.A.T.M.A.N. parameters */ #define BATADV_TQ_MAX_VALUE 255 #define BATADV_THROUGHPUT_MAX_VALUE 0xFFFFFFFF #define BATADV_JITTER 20 /* Time To Live of broadcast messages */ #define BATADV_TTL 50 /* maximum sequence number age of broadcast messages */ #define BATADV_BCAST_MAX_AGE 64 /* 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 200000 /* 200 seconds */ #define BATADV_TT_LOCAL_TIMEOUT 600000 /* in milliseconds */ #define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 /* in milliseconds */ #define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 /* in milliseconds */ #define BATADV_TT_WORK_PERIOD 5000 /* 5 seconds */ #define BATADV_ORIG_WORK_PERIOD 1000 /* 1 second */ #define BATADV_MCAST_WORK_PERIOD 500 /* 0.5 seconds */ #define BATADV_DAT_ENTRY_TIMEOUT (5 * 60000) /* 5 mins in milliseconds */ /* sliding packet range of received originator messages in sequence numbers * (should be a multiple of our word size) */ #define BATADV_TQ_LOCAL_WINDOW_SIZE 64 /* milliseconds we have to keep pending tt_req */ #define BATADV_TT_REQUEST_TIMEOUT 3000 #define BATADV_TQ_GLOBAL_WINDOW_SIZE 5 #define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM 1 #define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM 1 #define BATADV_TQ_TOTAL_BIDRECT_LIMIT 1 /* B.A.T.M.A.N. V */ #define BATADV_THROUGHPUT_DEFAULT_VALUE 10 /* 1 Mbps */ #define BATADV_ELP_PROBES_PER_NODE 2 #define BATADV_ELP_MIN_PROBE_SIZE 200 /* bytes */ #define BATADV_ELP_PROBE_MAX_TX_DIFF 100 /* milliseconds */ #define BATADV_ELP_MAX_AGE 64 #define BATADV_OGM_MAX_ORIGDIFF 5 #define BATADV_OGM_MAX_AGE 64 /* number of OGMs sent with the last tt diff */ #define BATADV_TT_OGM_APPEND_MAX 3 /* Time in which a client can roam at most ROAMING_MAX_COUNT times in * milliseconds */ #define BATADV_ROAMING_MAX_TIME 20000 #define BATADV_ROAMING_MAX_COUNT 5 #define BATADV_NO_FLAGS 0 #define BATADV_NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */ #define BATADV_NO_MARK 0 /* 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 ((struct batadv_hard_iface *)NULL) #define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE) #define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */ /* number of packets to send for broadcasts on different interface types */ #define BATADV_NUM_BCASTS_DEFAULT 1 #define BATADV_NUM_BCASTS_WIRELESS 3 #define BATADV_NUM_BCASTS_MAX 3 /* length of the single packet used by the TP meter */ #define BATADV_TP_PACKET_LEN ETH_DATA_LEN /* msecs after which an ARP_REQUEST is sent in broadcast as fallback */ #define ARP_REQ_DELAY 250 /* numbers of originator to contact for any PUT/GET DHT operation */ #define BATADV_DAT_CANDIDATES_NUM 3 /* 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 50 /* should not be bigger than 512 bytes or change the size of * forw_packet->direct_link_flags */ #define BATADV_MAX_AGGREGATION_BYTES 512 #define BATADV_MAX_AGGREGATION_MS 100 #define BATADV_BLA_PERIOD_LENGTH 10000 /* 10 seconds */ #define BATADV_BLA_BACKBONE_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 6) #define BATADV_BLA_CLAIM_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 10) #define BATADV_BLA_WAIT_PERIODS 3 #define BATADV_BLA_LOOPDETECT_PERIODS 6 #define BATADV_BLA_LOOPDETECT_TIMEOUT 3000 /* 3 seconds */ #define BATADV_DUPLIST_SIZE 16 #define BATADV_DUPLIST_TIMEOUT 500 /* 500 ms */ /* don't reset again within 30 seconds */ #define BATADV_RESET_PROTECTION_MS 30000 #define BATADV_EXPECTED_SEQNO_RANGE 65536 #define BATADV_NC_NODE_TIMEOUT 10000 /* Milliseconds */ /** * BATADV_TP_MAX_NUM - maximum number of simultaneously active tp sessions */ #define BATADV_TP_MAX_NUM 5 enum batadv_mesh_state { BATADV_MESH_INACTIVE, BATADV_MESH_ACTIVE, BATADV_MESH_DEACTIVATING, }; #define BATADV_BCAST_QUEUE_LEN 256 #define BATADV_BATMAN_QUEUE_LEN 256 enum batadv_uev_action { BATADV_UEV_ADD = 0, BATADV_UEV_DEL, BATADV_UEV_CHANGE, BATADV_UEV_LOOPDETECT, }; enum batadv_uev_type { BATADV_UEV_GW = 0, BATADV_UEV_BLA, }; #define BATADV_GW_THRESHOLD 50 /* Number of fragment chains for each orig_node */ #define BATADV_FRAG_BUFFER_COUNT 8 /* Maximum number of fragments for one packet */ #define BATADV_FRAG_MAX_FRAGMENTS 16 /* Maxumim size of each fragment */ #define BATADV_FRAG_MAX_FRAG_SIZE 1400 /* Time to keep fragments while waiting for rest of the fragments */ #define BATADV_FRAG_TIMEOUT 10000 #define BATADV_DAT_CANDIDATE_NOT_FOUND 0 #define BATADV_DAT_CANDIDATE_ORIG 1 /* Debug Messages */ #ifdef pr_fmt #undef pr_fmt #endif /* Append 'batman-adv: ' before kernel messages */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt /* Kernel headers */ #include <linux/bitops.h> /* for packet.h */ #include <linux/compiler.h> #include <linux/etherdevice.h> #include <linux/if_ether.h> /* for packet.h */ #include <linux/if_vlan.h> #include <linux/jiffies.h> #include <linux/percpu.h> #include <linux/types.h> #include "types.h" struct net_device; struct packet_type; struct seq_file; struct sk_buff; #define BATADV_PRINT_VID(vid) (((vid) & BATADV_VLAN_HAS_TAG) ? \ (int)((vid) & VLAN_VID_MASK) : -1) extern struct list_head batadv_hardif_list; 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); struct batadv_hard_iface * batadv_seq_print_text_primary_if_get(struct seq_file *seq); 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) { return ether_addr_equal_unaligned(data1, 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) { return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout)); } #define batadv_atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) /* Returns the smallest signed integer in two's complement with the sizeof x */ #define batadv_smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u))) /* Checks if a sequence number x is a predecessor/successor of y. * they handle overflows/underflows and can correctly check for a * predecessor/successor unless the variable sequence number has grown by * more then 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 */ #define batadv_seq_before(x, y) ({typeof(x)_d1 = (x); \ typeof(y)_d2 = (y); \ typeof(x)_dummy = (_d1 - _d2); \ (void)(&_d1 == &_d2); \ _dummy > batadv_smallest_signed_int(_dummy); }) #define batadv_seq_after(x, y) batadv_seq_before(y, x) /* 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) { this_cpu_add(bat_priv->bat_counters[idx], count); } #define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1) /* Define a macro to reach the control buffer of the skb. 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. */ #define BATADV_SKB_CB(__skb) ((struct batadv_skb_cb *)&((__skb)->cb[0])) 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); #endif /* _NET_BATMAN_ADV_MAIN_H_ */