309 lines
10 KiB
C
309 lines
10 KiB
C
/* 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 "2017.1"
|
|
#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 "packet.h"
|
|
#include "types.h"
|
|
|
|
struct net_device;
|
|
struct packet_type;
|
|
struct seq_file;
|
|
struct sk_buff;
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
if (vid & BATADV_VLAN_HAS_TAG)
|
|
return (int)(vid & VLAN_VID_MASK);
|
|
else
|
|
return -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_ */
|