blob: a1fcd884f0b12845a983f43a6057f130f6cdf1e7 [file] [log] [blame]
Simon Wunderliche19f9752014-01-04 18:04:25 +01001/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00002 *
3 * Marek Lindner, Simon Wunderlich
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
Antonio Quartulliebf38fb2013-11-03 20:40:48 +010015 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000016 */
17
18#ifndef _NET_BATMAN_ADV_MAIN_H_
19#define _NET_BATMAN_ADV_MAIN_H_
20
Marek Lindnerbc58eee2013-10-12 22:10:03 +080021#define BATADV_DRIVER_AUTHOR "Marek Lindner <mareklindner@neomailbox.ch>, " \
Simon Wunderlichc679ff82013-10-10 23:59:10 +020022 "Simon Wunderlich <sw@simonwunderlich.de>"
Sven Eckelmann42d0b042012-06-03 22:19:17 +020023#define BATADV_DRIVER_DESC "B.A.T.M.A.N. advanced"
24#define BATADV_DRIVER_DEVICE "batman-adv"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000025
Sven Eckelmann42d0b042012-06-03 22:19:17 +020026#ifndef BATADV_SOURCE_VERSION
Simon Wunderlich71b75d02014-07-21 16:05:35 +020027#define BATADV_SOURCE_VERSION "2014.4.0"
Sven Eckelmann44c43492011-07-05 10:42:51 +020028#endif
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000029
30/* B.A.T.M.A.N. parameters */
31
Sven Eckelmann42d0b042012-06-03 22:19:17 +020032#define BATADV_TQ_MAX_VALUE 255
33#define BATADV_JITTER 20
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000034
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020035/* Time To Live of broadcast messages */
Sven Eckelmann42d0b042012-06-03 22:19:17 +020036#define BATADV_TTL 50
Sven Eckelmann6e215fd2011-05-08 12:45:45 +020037
38/* purge originators after time in seconds if no valid packet comes in
Sven Eckelmann42d0b042012-06-03 22:19:17 +020039 * -> TODO: check influence on BATADV_TQ_LOCAL_WINDOW_SIZE
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020040 */
Sven Eckelmann42d0b042012-06-03 22:19:17 +020041#define BATADV_PURGE_TIMEOUT 200000 /* 200 seconds */
Antonio Quartulli7cf4d522012-11-08 22:16:15 +010042#define BATADV_TT_LOCAL_TIMEOUT 600000 /* in milliseconds */
Antonio Quartullia51fb9b2012-07-01 19:07:31 +020043#define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 /* in milliseconds */
Antonio Quartulli30cfd022012-07-05 23:38:29 +020044#define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 /* in milliseconds */
Antonio Quartulli72414442012-12-25 13:14:37 +010045#define BATADV_TT_WORK_PERIOD 5000 /* 5 seconds */
46#define BATADV_ORIG_WORK_PERIOD 1000 /* 1 second */
Antonio Quartulli2f1dfbe2012-06-30 20:01:19 +020047#define BATADV_DAT_ENTRY_TIMEOUT (5*60000) /* 5 mins in milliseconds */
Antonio Quartulli015758d2011-07-09 17:52:13 +020048/* sliding packet range of received originator messages in sequence numbers
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020049 * (should be a multiple of our word size)
50 */
Sven Eckelmann42d0b042012-06-03 22:19:17 +020051#define BATADV_TQ_LOCAL_WINDOW_SIZE 64
Antonio Quartullia51fb9b2012-07-01 19:07:31 +020052/* milliseconds we have to keep pending tt_req */
Sven Eckelmann42d0b042012-06-03 22:19:17 +020053#define BATADV_TT_REQUEST_TIMEOUT 3000
Antonio Quartullia73105b2011-04-27 14:27:44 +020054
Sven Eckelmann42d0b042012-06-03 22:19:17 +020055#define BATADV_TQ_GLOBAL_WINDOW_SIZE 5
56#define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM 1
57#define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM 1
58#define BATADV_TQ_TOTAL_BIDRECT_LIMIT 1
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000059
Sven Eckelmann42d0b042012-06-03 22:19:17 +020060/* number of OGMs sent with the last tt diff */
61#define BATADV_TT_OGM_APPEND_MAX 3
Antonio Quartullia73105b2011-04-27 14:27:44 +020062
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020063/* Time in which a client can roam at most ROAMING_MAX_COUNT times in
Antonio Quartullia51fb9b2012-07-01 19:07:31 +020064 * milliseconds
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020065 */
Sven Eckelmann42d0b042012-06-03 22:19:17 +020066#define BATADV_ROAMING_MAX_TIME 20000
67#define BATADV_ROAMING_MAX_COUNT 5
Antonio Quartullicc47f662011-04-27 14:27:57 +020068
Sven Eckelmann42d0b042012-06-03 22:19:17 +020069#define BATADV_NO_FLAGS 0
Marek Lindnerecbd5322011-06-09 17:13:09 +020070
Sven Eckelmann42d0b042012-06-03 22:19:17 +020071#define BATADV_NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */
Antonio Quartullibc279082011-07-07 15:35:35 +020072
Antonio Quartulli9464d072013-11-16 12:03:48 +010073#define BATADV_NO_MARK 0
74
Simon Wunderlich89652332013-11-13 19:14:46 +010075/* default interface for multi interface operation. The default interface is
76 * used for communication which originated locally (i.e. is not forwarded)
77 * or where special forwarding is not desired/necessary.
78 */
79#define BATADV_IF_DEFAULT ((struct batadv_hard_iface *)NULL)
80
Sven Eckelmann42d0b042012-06-03 22:19:17 +020081#define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000082
Sven Eckelmann42d0b042012-06-03 22:19:17 +020083#define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000084
Matthias Schiffercaf65bf2013-03-09 23:14:23 +010085/* number of packets to send for broadcasts on different interface types */
86#define BATADV_NUM_BCASTS_DEFAULT 1
87#define BATADV_NUM_BCASTS_WIRELESS 3
88#define BATADV_NUM_BCASTS_MAX 3
89
Antonio Quartullic384ea32011-06-26 03:37:18 +020090/* msecs after which an ARP_REQUEST is sent in broadcast as fallback */
91#define ARP_REQ_DELAY 250
Antonio Quartulli785ea112011-11-23 11:35:44 +010092/* numbers of originator to contact for any PUT/GET DHT operation */
93#define BATADV_DAT_CANDIDATES_NUM 3
94
Antonio Quartullic43c9812013-09-02 12:15:05 +020095/**
96 * BATADV_TQ_SIMILARITY_THRESHOLD - TQ points that a secondary metric can differ
97 * at most from the primary one in order to be still considered acceptable
98 */
99#define BATADV_TQ_SIMILARITY_THRESHOLD 50
100
Sven Eckelmann6e215fd2011-05-08 12:45:45 +0200101/* how much worse secondary interfaces may be to be considered as bonding
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200102 * candidates
103 */
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200104#define BATADV_BONDING_TQ_THRESHOLD 50
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000105
Sven Eckelmann6e215fd2011-05-08 12:45:45 +0200106/* should not be bigger than 512 bytes or change the size of
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200107 * forw_packet->direct_link_flags
108 */
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200109#define BATADV_MAX_AGGREGATION_BYTES 512
110#define BATADV_MAX_AGGREGATION_MS 100
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000111
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200112#define BATADV_BLA_PERIOD_LENGTH 10000 /* 10 seconds */
113#define BATADV_BLA_BACKBONE_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 3)
114#define BATADV_BLA_CLAIM_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 10)
Simon Wunderlich28709872012-09-13 18:18:46 +0200115#define BATADV_BLA_WAIT_PERIODS 3
Simon Wunderlichfe2da6f2012-01-22 20:00:24 +0100116
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200117#define BATADV_DUPLIST_SIZE 16
118#define BATADV_DUPLIST_TIMEOUT 500 /* 500 ms */
Sven Eckelmann6e215fd2011-05-08 12:45:45 +0200119/* don't reset again within 30 seconds */
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200120#define BATADV_RESET_PROTECTION_MS 30000
121#define BATADV_EXPECTED_SEQNO_RANGE 65536
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000122
Martin Hundebølld56b1702013-01-25 11:12:39 +0100123#define BATADV_NC_NODE_TIMEOUT 10000 /* Milliseconds */
124
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200125enum batadv_mesh_state {
126 BATADV_MESH_INACTIVE,
127 BATADV_MESH_ACTIVE,
128 BATADV_MESH_DEACTIVATING,
Sven Eckelmanne8958db2011-06-04 11:26:00 +0200129};
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000130
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200131#define BATADV_BCAST_QUEUE_LEN 256
132#define BATADV_BATMAN_QUEUE_LEN 256
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000133
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200134enum batadv_uev_action {
135 BATADV_UEV_ADD = 0,
136 BATADV_UEV_DEL,
137 BATADV_UEV_CHANGE,
Antonio Quartullic6bda682011-04-26 18:26:01 +0200138};
139
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200140enum batadv_uev_type {
141 BATADV_UEV_GW = 0,
Antonio Quartullic6bda682011-04-26 18:26:01 +0200142};
143
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200144#define BATADV_GW_THRESHOLD 50
Antonio Quartulli43676ab52011-04-26 21:31:45 +0200145
Martin Hundebøll610bfc6bc2013-05-23 16:53:02 +0200146/* Number of fragment chains for each orig_node */
147#define BATADV_FRAG_BUFFER_COUNT 8
148/* Maximum number of fragments for one packet */
149#define BATADV_FRAG_MAX_FRAGMENTS 16
150/* Maxumim size of each fragment */
151#define BATADV_FRAG_MAX_FRAG_SIZE 1400
152/* Time to keep fragments while waiting for rest of the fragments */
153#define BATADV_FRAG_TIMEOUT 10000
154
Antonio Quartulli785ea112011-11-23 11:35:44 +0100155#define BATADV_DAT_CANDIDATE_NOT_FOUND 0
156#define BATADV_DAT_CANDIDATE_ORIG 1
157
Sven Eckelmann21a12362012-03-07 09:07:46 +0100158/* Debug Messages */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000159#ifdef pr_fmt
160#undef pr_fmt
161#endif
Sven Eckelmann6e215fd2011-05-08 12:45:45 +0200162/* Append 'batman-adv: ' before kernel messages */
163#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000164
Sven Eckelmann21a12362012-03-07 09:07:46 +0100165/* Kernel headers */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000166
167#include <linux/mutex.h> /* mutex */
168#include <linux/module.h> /* needed by all modules */
169#include <linux/netdevice.h> /* netdevice */
Antonio Quartulli015758d2011-07-09 17:52:13 +0200170#include <linux/etherdevice.h> /* ethernet address classification */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000171#include <linux/if_ether.h> /* ethernet header */
172#include <linux/poll.h> /* poll_table */
173#include <linux/kthread.h> /* kernel threads */
174#include <linux/pkt_sched.h> /* schedule types */
175#include <linux/workqueue.h> /* workqueue */
Martin Hundebøllf8214862012-04-20 17:02:45 +0200176#include <linux/percpu.h>
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000177#include <linux/slab.h>
178#include <net/sock.h> /* struct sock */
Linus Lüssingc5caf4e2014-02-15 17:47:49 +0100179#include <net/addrconf.h> /* ipv6 address stuff */
Linus Lüssingab498862014-02-15 17:47:53 +0100180#include <linux/ip.h>
Sven Eckelmanna4ac28c2013-02-11 17:10:26 +0800181#include <net/rtnetlink.h>
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000182#include <linux/jiffies.h>
183#include <linux/seq_file.h>
Antonio Quartulli16052782013-06-04 12:11:41 +0200184#include <linux/if_vlan.h>
185
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000186#include "types.h"
187
Antonio Quartullieb2deb62013-04-19 18:07:00 +0200188#define BATADV_PRINT_VID(vid) (vid & BATADV_VLAN_HAS_TAG ? \
189 (int)(vid & VLAN_VID_MASK) : -1)
190
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200191extern char batadv_routing_algo[];
192extern struct list_head batadv_hardif_list;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000193
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200194extern unsigned char batadv_broadcast_addr[];
195extern struct workqueue_struct *batadv_event_workqueue;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000196
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200197int batadv_mesh_init(struct net_device *soft_iface);
198void batadv_mesh_free(struct net_device *soft_iface);
Antonio Quartullife8a93b2013-04-03 19:10:26 +0200199int batadv_is_my_mac(struct batadv_priv *bat_priv, const uint8_t *addr);
Marek Lindner30da63a2012-08-03 17:15:46 +0200200struct batadv_hard_iface *
201batadv_seq_print_text_primary_if_get(struct seq_file *seq);
Marek Lindner411d6ed2013-05-08 13:31:59 +0800202int batadv_max_header_len(void);
Simon Wunderlichc54f38c2013-07-29 17:56:44 +0200203void batadv_skb_set_priority(struct sk_buff *skb, int offset);
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200204int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
205 struct packet_type *ptype,
206 struct net_device *orig_dev);
Sven Eckelmann56303d32012-06-05 22:31:31 +0200207int
208batadv_recv_handler_register(uint8_t packet_type,
209 int (*recv_handler)(struct sk_buff *,
210 struct batadv_hard_iface *));
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200211void batadv_recv_handler_unregister(uint8_t packet_type);
Sven Eckelmann56303d32012-06-05 22:31:31 +0200212int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops);
213int batadv_algo_select(struct batadv_priv *bat_priv, char *name);
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200214int batadv_algo_seq_print_text(struct seq_file *seq, void *offset);
Sven Eckelmann95a066d2012-10-17 21:10:39 +0200215__be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000216
Antonio Quartulli0aca86c2012-08-27 11:45:37 +0200217/**
218 * enum batadv_dbg_level - available log levels
219 * @BATADV_DBG_BATMAN: OGM and TQ computations related messages
220 * @BATADV_DBG_ROUTES: route added / changed / deleted
221 * @BATADV_DBG_TT: translation table messages
222 * @BATADV_DBG_BLA: bridge loop avoidance messages
Antonio Quartulli0e861a32012-10-01 09:57:36 +0200223 * @BATADV_DBG_DAT: ARP snooping and DAT related messages
Martin Hundebølld353d8d2013-01-25 11:12:38 +0100224 * @BATADV_DBG_NC: network coding related messages
Antonio Quartulli0aca86c2012-08-27 11:45:37 +0200225 * @BATADV_DBG_ALL: the union of all the above log levels
226 */
Sven Eckelmann8de47de2012-07-08 16:32:09 +0200227enum batadv_dbg_level {
228 BATADV_DBG_BATMAN = BIT(0),
Antonio Quartulli0aca86c2012-08-27 11:45:37 +0200229 BATADV_DBG_ROUTES = BIT(1),
230 BATADV_DBG_TT = BIT(2),
231 BATADV_DBG_BLA = BIT(3),
Antonio Quartulli0e861a32012-10-01 09:57:36 +0200232 BATADV_DBG_DAT = BIT(4),
Martin Hundebølld353d8d2013-01-25 11:12:38 +0100233 BATADV_DBG_NC = BIT(5),
234 BATADV_DBG_ALL = 63,
Sven Eckelmann8de47de2012-07-08 16:32:09 +0200235};
236
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000237#ifdef CONFIG_BATMAN_ADV_DEBUG
Sven Eckelmann56303d32012-06-05 22:31:31 +0200238int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
Sven Eckelmann40a072d2012-05-12 02:09:23 +0200239__printf(2, 3);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000240
André Gaul23c4ec12014-06-10 17:50:31 +0200241/* possibly ratelimited debug output */
242#define _batadv_dbg(type, bat_priv, ratelimited, fmt, arg...) \
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000243 do { \
André Gaul23c4ec12014-06-10 17:50:31 +0200244 if (atomic_read(&bat_priv->log_level) & type && \
245 (!ratelimited || net_ratelimit())) \
Sven Eckelmann40a072d2012-05-12 02:09:23 +0200246 batadv_debug_log(bat_priv, fmt, ## arg);\
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000247 } \
248 while (0)
249#else /* !CONFIG_BATMAN_ADV_DEBUG */
André Gaul23c4ec12014-06-10 17:50:31 +0200250__printf(4, 5)
251static inline void _batadv_dbg(int type __always_unused,
252 struct batadv_priv *bat_priv __always_unused,
253 int ratelimited __always_unused,
254 const char *fmt __always_unused, ...)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000255{
256}
257#endif
258
André Gaul23c4ec12014-06-10 17:50:31 +0200259#define batadv_dbg(type, bat_priv, arg...) \
260 _batadv_dbg(type, bat_priv, 0, ## arg)
261#define batadv_dbg_ratelimited(type, bat_priv, arg...) \
262 _batadv_dbg(type, bat_priv, 1, ## arg)
263
Sven Eckelmann3e348192012-05-16 20:23:22 +0200264#define batadv_info(net_dev, fmt, arg...) \
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000265 do { \
266 struct net_device *_netdev = (net_dev); \
Sven Eckelmann56303d32012-06-05 22:31:31 +0200267 struct batadv_priv *_batpriv = netdev_priv(_netdev); \
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200268 batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg); \
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000269 pr_info("%s: " fmt, _netdev->name, ## arg); \
270 } while (0)
Sven Eckelmann3e348192012-05-16 20:23:22 +0200271#define batadv_err(net_dev, fmt, arg...) \
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000272 do { \
273 struct net_device *_netdev = (net_dev); \
Sven Eckelmann56303d32012-06-05 22:31:31 +0200274 struct batadv_priv *_batpriv = netdev_priv(_netdev); \
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200275 batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg); \
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000276 pr_err("%s: " fmt, _netdev->name, ## arg); \
277 } while (0)
278
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200279/* returns 1 if they are the same ethernet addr
Marek Lindner39901e72011-02-18 12:28:08 +0000280 *
Joe Perchesc3923b72013-09-01 15:45:08 -0700281 * note: can't use ether_addr_equal() as it requires aligned memory
Marek Lindner39901e72011-02-18 12:28:08 +0000282 */
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200283static inline int batadv_compare_eth(const void *data1, const void *data2)
Marek Lindner39901e72011-02-18 12:28:08 +0000284{
Joe Perchesd9cd4fe52013-12-06 14:39:46 -0800285 return ether_addr_equal_unaligned(data1, data2);
Marek Lindner39901e72011-02-18 12:28:08 +0000286}
287
Ben Hutchings2c530402012-07-10 10:55:09 +0000288/**
289 * has_timed_out - compares current time (jiffies) and timestamp + timeout
Martin Hundebølla04ccd52011-12-08 13:32:41 +0100290 * @timestamp: base value to compare with (in jiffies)
291 * @timeout: added to base value before comparing (in milliseconds)
292 *
293 * Returns true if current time is after timestamp + timeout
294 */
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200295static inline bool batadv_has_timed_out(unsigned long timestamp,
296 unsigned int timeout)
Martin Hundebølla04ccd52011-12-08 13:32:41 +0100297{
298 return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout));
299}
Sven Eckelmann747e4222011-05-14 23:14:50 +0200300
Sven Eckelmann3e348192012-05-16 20:23:22 +0200301#define batadv_atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
Antonio Quartulli5f657ec2011-04-20 09:52:56 +0200302
Antonio Quartullif5d33d32011-05-18 09:20:50 +0200303/* Returns the smallest signed integer in two's complement with the sizeof x */
Sven Eckelmann3e348192012-05-16 20:23:22 +0200304#define batadv_smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
Antonio Quartullif5d33d32011-05-18 09:20:50 +0200305
306/* Checks if a sequence number x is a predecessor/successor of y.
307 * they handle overflows/underflows and can correctly check for a
308 * predecessor/successor unless the variable sequence number has grown by
309 * more then 2**(bitwidth(x)-1)-1.
310 * This means that for a uint8_t with the maximum value 255, it would think:
311 * - when adding nothing - it is neither a predecessor nor a successor
312 * - before adding more than 127 to the starting value - it is a predecessor,
313 * - when adding 128 - it is neither a predecessor nor a successor,
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200314 * - after adding more than 127 to the starting value - it is a successor
315 */
Sven Eckelmann3e348192012-05-16 20:23:22 +0200316#define batadv_seq_before(x, y) ({typeof(x) _d1 = (x); \
317 typeof(y) _d2 = (y); \
318 typeof(x) _dummy = (_d1 - _d2); \
319 (void) (&_d1 == &_d2); \
320 _dummy > batadv_smallest_signed_int(_dummy); })
321#define batadv_seq_after(x, y) batadv_seq_before(y, x)
Antonio Quartullif5d33d32011-05-18 09:20:50 +0200322
Martin Hundebøllf8214862012-04-20 17:02:45 +0200323/* Stop preemption on local cpu while incrementing the counter */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200324static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx,
Martin Hundebøllf8214862012-04-20 17:02:45 +0200325 size_t count)
326{
Shan Wei56917442012-11-13 09:53:26 +0800327 this_cpu_add(bat_priv->bat_counters[idx], count);
Martin Hundebøllf8214862012-04-20 17:02:45 +0200328}
329
330#define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1)
331
332/* Sum and return the cpu-local counters for index 'idx' */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200333static inline uint64_t batadv_sum_counter(struct batadv_priv *bat_priv,
334 size_t idx)
Martin Hundebøllf8214862012-04-20 17:02:45 +0200335{
Marek Lindner0c5e45b62012-06-23 11:46:05 +0200336 uint64_t *counters, sum = 0;
Martin Hundebøllf8214862012-04-20 17:02:45 +0200337 int cpu;
Martin Hundebøllf8214862012-04-20 17:02:45 +0200338
339 for_each_possible_cpu(cpu) {
340 counters = per_cpu_ptr(bat_priv->bat_counters, cpu);
341 sum += counters[idx];
342 }
343
344 return sum;
345}
346
Martin Hundebøll3c12de92013-01-25 11:12:41 +0100347/* Define a macro to reach the control buffer of the skb. The members of the
348 * control buffer are defined in struct batadv_skb_cb in types.h.
349 * The macro is inspired by the similar macro TCP_SKB_CB() in tcp.h.
350 */
351#define BATADV_SKB_CB(__skb) ((struct batadv_skb_cb *)&((__skb)->cb[0]))
352
Marek Lindneref261572013-04-23 21:39:57 +0800353void batadv_tvlv_container_register(struct batadv_priv *bat_priv,
354 uint8_t type, uint8_t version,
355 void *tvlv_value, uint16_t tvlv_value_len);
356uint16_t batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv,
357 unsigned char **packet_buff,
358 int *packet_buff_len,
359 int packet_min_len);
360void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv,
361 struct batadv_ogm_packet *batadv_ogm_packet,
362 struct batadv_orig_node *orig_node);
363void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv,
364 uint8_t type, uint8_t version);
365
366void batadv_tvlv_handler_register(struct batadv_priv *bat_priv,
367 void (*optr)(struct batadv_priv *bat_priv,
368 struct batadv_orig_node *orig,
369 uint8_t flags,
370 void *tvlv_value,
371 uint16_t tvlv_value_len),
372 int (*uptr)(struct batadv_priv *bat_priv,
373 uint8_t *src, uint8_t *dst,
374 void *tvlv_value,
375 uint16_t tvlv_value_len),
376 uint8_t type, uint8_t version, uint8_t flags);
377void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv,
378 uint8_t type, uint8_t version);
379int batadv_tvlv_containers_process(struct batadv_priv *bat_priv,
380 bool ogm_source,
381 struct batadv_orig_node *orig_node,
382 uint8_t *src, uint8_t *dst,
383 void *tvlv_buff, uint16_t tvlv_buff_len);
384void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, uint8_t *src,
385 uint8_t *dst, uint8_t type, uint8_t version,
386 void *tvlv_value, uint16_t tvlv_value_len);
Antonio Quartullic018ad32013-06-04 12:11:39 +0200387unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len);
Antonio Quartullieceb22a2013-11-16 12:03:51 +0100388bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid);
Marek Lindneref261572013-04-23 21:39:57 +0800389
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000390#endif /* _NET_BATMAN_ADV_MAIN_H_ */