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43676ab590
If a client issues a DHCPREQUEST for renewal, the packet is dropped if the old destination (the old gateway for the client) TQ is smaller than the current best gateway TQ less GW_THRESHOLD Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Sven Eckelmann <sven@narfation.org>
231 lines
6.6 KiB
C
231 lines
6.6 KiB
C
/*
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* Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*
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*/
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#ifndef _NET_BATMAN_ADV_MAIN_H_
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#define _NET_BATMAN_ADV_MAIN_H_
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#define DRIVER_AUTHOR "Marek Lindner <lindner_marek@yahoo.de>, " \
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"Simon Wunderlich <siwu@hrz.tu-chemnitz.de>"
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#define DRIVER_DESC "B.A.T.M.A.N. advanced"
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#define DRIVER_DEVICE "batman-adv"
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#define SOURCE_VERSION "next"
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/* B.A.T.M.A.N. parameters */
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#define TQ_MAX_VALUE 255
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#define JITTER 20
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/* Time To Live of broadcast messages */
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#define TTL 50
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/* purge originators after time in seconds if no valid packet comes in
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* -> TODO: check influence on TQ_LOCAL_WINDOW_SIZE */
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#define PURGE_TIMEOUT 200
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#define TT_LOCAL_TIMEOUT 3600 /* in seconds */
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#define TT_CLIENT_ROAM_TIMEOUT 600
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/* sliding packet range of received originator messages in squence numbers
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* (should be a multiple of our word size) */
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#define TQ_LOCAL_WINDOW_SIZE 64
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#define TT_REQUEST_TIMEOUT 3 /* seconds we have to keep pending tt_req */
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#define TQ_GLOBAL_WINDOW_SIZE 5
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#define TQ_LOCAL_BIDRECT_SEND_MINIMUM 1
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#define TQ_LOCAL_BIDRECT_RECV_MINIMUM 1
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#define TQ_TOTAL_BIDRECT_LIMIT 1
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#define TT_OGM_APPEND_MAX 3 /* number of OGMs sent with the last tt diff */
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#define ROAMING_MAX_TIME 20 /* Time in which a client can roam at most
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* ROAMING_MAX_COUNT times */
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#define ROAMING_MAX_COUNT 5
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#define NO_FLAGS 0
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#define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE)
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#define LOG_BUF_LEN 8192 /* has to be a power of 2 */
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#define VIS_INTERVAL 5000 /* 5 seconds */
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/* how much worse secondary interfaces may be to be considered as bonding
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* candidates */
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#define BONDING_TQ_THRESHOLD 50
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/* should not be bigger than 512 bytes or change the size of
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* forw_packet->direct_link_flags */
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#define MAX_AGGREGATION_BYTES 512
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#define MAX_AGGREGATION_MS 100
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#define SOFTIF_NEIGH_TIMEOUT 180000 /* 3 minutes */
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/* don't reset again within 30 seconds */
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#define RESET_PROTECTION_MS 30000
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#define EXPECTED_SEQNO_RANGE 65536
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enum mesh_state {
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MESH_INACTIVE,
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MESH_ACTIVE,
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MESH_DEACTIVATING
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};
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#define BCAST_QUEUE_LEN 256
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#define BATMAN_QUEUE_LEN 256
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enum uev_action {
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UEV_ADD = 0,
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UEV_DEL,
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UEV_CHANGE
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};
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enum uev_type {
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UEV_GW = 0
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};
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#define GW_THRESHOLD 50
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/*
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* Debug Messages
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*/
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#ifdef pr_fmt
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#undef pr_fmt
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#endif
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/* Append 'batman-adv: ' before kernel messages */
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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/* all messages related to routing / flooding / broadcasting / etc */
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enum dbg_level {
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DBG_BATMAN = 1 << 0,
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DBG_ROUTES = 1 << 1, /* route added / changed / deleted */
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DBG_TT = 1 << 2, /* translation table operations */
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DBG_ALL = 7
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};
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/*
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* Vis
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*/
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/*
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* Kernel headers
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*/
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#include <linux/mutex.h> /* mutex */
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#include <linux/module.h> /* needed by all modules */
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#include <linux/netdevice.h> /* netdevice */
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#include <linux/etherdevice.h> /* ethernet address classifaction */
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#include <linux/if_ether.h> /* ethernet header */
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#include <linux/poll.h> /* poll_table */
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#include <linux/kthread.h> /* kernel threads */
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#include <linux/pkt_sched.h> /* schedule types */
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#include <linux/workqueue.h> /* workqueue */
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#include <linux/slab.h>
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#include <net/sock.h> /* struct sock */
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#include <linux/jiffies.h>
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#include <linux/seq_file.h>
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#include "types.h"
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#ifndef REVISION_VERSION
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#define REVISION_VERSION_STR ""
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#else
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#define REVISION_VERSION_STR " "REVISION_VERSION
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#endif
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extern struct list_head hardif_list;
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extern unsigned char broadcast_addr[];
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extern struct workqueue_struct *bat_event_workqueue;
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int mesh_init(struct net_device *soft_iface);
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void mesh_free(struct net_device *soft_iface);
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void inc_module_count(void);
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void dec_module_count(void);
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int is_my_mac(const uint8_t *addr);
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#ifdef CONFIG_BATMAN_ADV_DEBUG
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int debug_log(struct bat_priv *bat_priv, const char *fmt, ...) __printf(2, 3);
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#define bat_dbg(type, bat_priv, fmt, arg...) \
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do { \
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if (atomic_read(&bat_priv->log_level) & type) \
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debug_log(bat_priv, fmt, ## arg); \
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} \
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while (0)
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#else /* !CONFIG_BATMAN_ADV_DEBUG */
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__printf(3, 4)
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static inline void bat_dbg(int type __always_unused,
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struct bat_priv *bat_priv __always_unused,
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const char *fmt __always_unused, ...)
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{
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}
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#endif
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#define bat_info(net_dev, fmt, arg...) \
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do { \
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struct net_device *_netdev = (net_dev); \
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struct bat_priv *_batpriv = netdev_priv(_netdev); \
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bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
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pr_info("%s: " fmt, _netdev->name, ## arg); \
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} while (0)
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#define bat_err(net_dev, fmt, arg...) \
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do { \
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struct net_device *_netdev = (net_dev); \
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struct bat_priv *_batpriv = netdev_priv(_netdev); \
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bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
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pr_err("%s: " fmt, _netdev->name, ## arg); \
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} while (0)
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/**
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* returns 1 if they are the same ethernet addr
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*
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* note: can't use compare_ether_addr() as it requires aligned memory
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*/
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static inline int compare_eth(const void *data1, const void *data2)
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{
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return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
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}
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#define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
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/* Returns the smallest signed integer in two's complement with the sizeof x */
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#define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
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/* Checks if a sequence number x is a predecessor/successor of y.
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* they handle overflows/underflows and can correctly check for a
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* predecessor/successor unless the variable sequence number has grown by
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* more then 2**(bitwidth(x)-1)-1.
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* This means that for a uint8_t with the maximum value 255, it would think:
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* - when adding nothing - it is neither a predecessor nor a successor
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* - before adding more than 127 to the starting value - it is a predecessor,
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* - when adding 128 - it is neither a predecessor nor a successor,
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* - after adding more than 127 to the starting value - it is a successor */
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#define seq_before(x, y) ({typeof(x) _d1 = (x); \
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typeof(y) _d2 = (y); \
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typeof(x) _dummy = (_d1 - _d2); \
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(void) (&_d1 == &_d2); \
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_dummy > smallest_signed_int(_dummy); })
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#define seq_after(x, y) seq_before(y, x)
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#endif /* _NET_BATMAN_ADV_MAIN_H_ */
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