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7db7d9f3 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
7a79d717 | 2 | /* Copyright (C) 2007-2019 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
3 | * |
4 | * Marek Lindner, Simon Wunderlich | |
c6c8fea2 SE |
5 | */ |
6 | ||
7 | #ifndef _NET_BATMAN_ADV_MAIN_H_ | |
8 | #define _NET_BATMAN_ADV_MAIN_H_ | |
9 | ||
bc58eeef | 10 | #define BATADV_DRIVER_AUTHOR "Marek Lindner <mareklindner@neomailbox.ch>, " \ |
c679ff8f | 11 | "Simon Wunderlich <sw@simonwunderlich.de>" |
42d0b044 SE |
12 | #define BATADV_DRIVER_DESC "B.A.T.M.A.N. advanced" |
13 | #define BATADV_DRIVER_DEVICE "batman-adv" | |
c6c8fea2 | 14 | |
42d0b044 | 15 | #ifndef BATADV_SOURCE_VERSION |
79f0a485 | 16 | #define BATADV_SOURCE_VERSION "2019.5" |
44c4349a | 17 | #endif |
c6c8fea2 SE |
18 | |
19 | /* B.A.T.M.A.N. parameters */ | |
20 | ||
42d0b044 | 21 | #define BATADV_TQ_MAX_VALUE 255 |
0da00359 | 22 | #define BATADV_THROUGHPUT_MAX_VALUE 0xFFFFFFFF |
42d0b044 | 23 | #define BATADV_JITTER 20 |
c6c8fea2 | 24 | |
9cfc7bd6 | 25 | /* Time To Live of broadcast messages */ |
42d0b044 | 26 | #define BATADV_TTL 50 |
6e215fd8 | 27 | |
81f02683 SW |
28 | /* maximum sequence number age of broadcast messages */ |
29 | #define BATADV_BCAST_MAX_AGE 64 | |
30 | ||
6e215fd8 | 31 | /* purge originators after time in seconds if no valid packet comes in |
42d0b044 | 32 | * -> TODO: check influence on BATADV_TQ_LOCAL_WINDOW_SIZE |
9cfc7bd6 | 33 | */ |
42d0b044 | 34 | #define BATADV_PURGE_TIMEOUT 200000 /* 200 seconds */ |
7cf4d520 | 35 | #define BATADV_TT_LOCAL_TIMEOUT 600000 /* in milliseconds */ |
a51fb9b2 | 36 | #define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 /* in milliseconds */ |
30cfd02b | 37 | #define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 /* in milliseconds */ |
72414442 AQ |
38 | #define BATADV_TT_WORK_PERIOD 5000 /* 5 seconds */ |
39 | #define BATADV_ORIG_WORK_PERIOD 1000 /* 1 second */ | |
cbebd363 | 40 | #define BATADV_MCAST_WORK_PERIOD 500 /* 0.5 seconds */ |
fc1f8693 | 41 | #define BATADV_DAT_ENTRY_TIMEOUT (5 * 60000) /* 5 mins in milliseconds */ |
015758d0 | 42 | /* sliding packet range of received originator messages in sequence numbers |
9cfc7bd6 SE |
43 | * (should be a multiple of our word size) |
44 | */ | |
42d0b044 | 45 | #define BATADV_TQ_LOCAL_WINDOW_SIZE 64 |
a51fb9b2 | 46 | /* milliseconds we have to keep pending tt_req */ |
42d0b044 | 47 | #define BATADV_TT_REQUEST_TIMEOUT 3000 |
a73105b8 | 48 | |
42d0b044 SE |
49 | #define BATADV_TQ_GLOBAL_WINDOW_SIZE 5 |
50 | #define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM 1 | |
51 | #define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM 1 | |
52 | #define BATADV_TQ_TOTAL_BIDRECT_LIMIT 1 | |
c6c8fea2 | 53 | |
162bd64c | 54 | /* B.A.T.M.A.N. V */ |
c833484e | 55 | #define BATADV_THROUGHPUT_DEFAULT_VALUE 10 /* 1 Mbps */ |
8d2d499e AQ |
56 | #define BATADV_ELP_PROBES_PER_NODE 2 |
57 | #define BATADV_ELP_MIN_PROBE_SIZE 200 /* bytes */ | |
58 | #define BATADV_ELP_PROBE_MAX_TX_DIFF 100 /* milliseconds */ | |
162bd64c | 59 | #define BATADV_ELP_MAX_AGE 64 |
9323158e AQ |
60 | #define BATADV_OGM_MAX_ORIGDIFF 5 |
61 | #define BATADV_OGM_MAX_AGE 64 | |
162bd64c | 62 | |
42d0b044 SE |
63 | /* number of OGMs sent with the last tt diff */ |
64 | #define BATADV_TT_OGM_APPEND_MAX 3 | |
a73105b8 | 65 | |
9cfc7bd6 | 66 | /* Time in which a client can roam at most ROAMING_MAX_COUNT times in |
a51fb9b2 | 67 | * milliseconds |
9cfc7bd6 | 68 | */ |
42d0b044 SE |
69 | #define BATADV_ROAMING_MAX_TIME 20000 |
70 | #define BATADV_ROAMING_MAX_COUNT 5 | |
cc47f66e | 71 | |
42d0b044 | 72 | #define BATADV_NO_FLAGS 0 |
ecbd5321 | 73 | |
42d0b044 | 74 | #define BATADV_NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */ |
bc279080 | 75 | |
9464d071 AQ |
76 | #define BATADV_NO_MARK 0 |
77 | ||
89652331 SW |
78 | /* default interface for multi interface operation. The default interface is |
79 | * used for communication which originated locally (i.e. is not forwarded) | |
80 | * or where special forwarding is not desired/necessary. | |
81 | */ | |
82 | #define BATADV_IF_DEFAULT ((struct batadv_hard_iface *)NULL) | |
83 | ||
42d0b044 | 84 | #define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE) |
c6c8fea2 | 85 | |
42d0b044 | 86 | #define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */ |
c6c8fea2 | 87 | |
caf65bfc MS |
88 | /* number of packets to send for broadcasts on different interface types */ |
89 | #define BATADV_NUM_BCASTS_DEFAULT 1 | |
90 | #define BATADV_NUM_BCASTS_WIRELESS 3 | |
91 | #define BATADV_NUM_BCASTS_MAX 3 | |
92 | ||
33a3bb4a AQ |
93 | /* length of the single packet used by the TP meter */ |
94 | #define BATADV_TP_PACKET_LEN ETH_DATA_LEN | |
95 | ||
c384ea3e AQ |
96 | /* msecs after which an ARP_REQUEST is sent in broadcast as fallback */ |
97 | #define ARP_REQ_DELAY 250 | |
785ea114 AQ |
98 | /* numbers of originator to contact for any PUT/GET DHT operation */ |
99 | #define BATADV_DAT_CANDIDATES_NUM 3 | |
100 | ||
a0e28775 MH |
101 | /* BATADV_TQ_SIMILARITY_THRESHOLD - TQ points that a secondary metric can differ |
102 | * at most from the primary one in order to be still considered acceptable | |
c43c981e AQ |
103 | */ |
104 | #define BATADV_TQ_SIMILARITY_THRESHOLD 50 | |
105 | ||
6e215fd8 | 106 | /* should not be bigger than 512 bytes or change the size of |
9cfc7bd6 SE |
107 | * forw_packet->direct_link_flags |
108 | */ | |
42d0b044 SE |
109 | #define BATADV_MAX_AGGREGATION_BYTES 512 |
110 | #define BATADV_MAX_AGGREGATION_MS 100 | |
c6c8fea2 | 111 | |
42d0b044 | 112 | #define BATADV_BLA_PERIOD_LENGTH 10000 /* 10 seconds */ |
e1544f3c | 113 | #define BATADV_BLA_BACKBONE_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 6) |
42d0b044 | 114 | #define BATADV_BLA_CLAIM_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 10) |
28709878 | 115 | #define BATADV_BLA_WAIT_PERIODS 3 |
cd9c7bfb SW |
116 | #define BATADV_BLA_LOOPDETECT_PERIODS 6 |
117 | #define BATADV_BLA_LOOPDETECT_TIMEOUT 3000 /* 3 seconds */ | |
fe2da6ff | 118 | |
42d0b044 SE |
119 | #define BATADV_DUPLIST_SIZE 16 |
120 | #define BATADV_DUPLIST_TIMEOUT 500 /* 500 ms */ | |
6e215fd8 | 121 | /* don't reset again within 30 seconds */ |
42d0b044 SE |
122 | #define BATADV_RESET_PROTECTION_MS 30000 |
123 | #define BATADV_EXPECTED_SEQNO_RANGE 65536 | |
c6c8fea2 | 124 | |
d56b1705 MH |
125 | #define BATADV_NC_NODE_TIMEOUT 10000 /* Milliseconds */ |
126 | ||
33a3bb4a AQ |
127 | /** |
128 | * BATADV_TP_MAX_NUM - maximum number of simultaneously active tp sessions | |
129 | */ | |
130 | #define BATADV_TP_MAX_NUM 5 | |
131 | ||
73844a8c SE |
132 | /** |
133 | * enum batadv_mesh_state - State of a soft interface | |
134 | */ | |
39c75a51 | 135 | enum batadv_mesh_state { |
73844a8c | 136 | /** @BATADV_MESH_INACTIVE: soft interface is not yet running */ |
39c75a51 | 137 | BATADV_MESH_INACTIVE, |
73844a8c SE |
138 | |
139 | /** @BATADV_MESH_ACTIVE: interface is up and running */ | |
39c75a51 | 140 | BATADV_MESH_ACTIVE, |
73844a8c SE |
141 | |
142 | /** @BATADV_MESH_DEACTIVATING: interface is getting shut down */ | |
39c75a51 | 143 | BATADV_MESH_DEACTIVATING, |
e8958dbf | 144 | }; |
c6c8fea2 | 145 | |
42d0b044 SE |
146 | #define BATADV_BCAST_QUEUE_LEN 256 |
147 | #define BATADV_BATMAN_QUEUE_LEN 256 | |
c6c8fea2 | 148 | |
73844a8c SE |
149 | /** |
150 | * enum batadv_uev_action - action type of uevent | |
151 | */ | |
39c75a51 | 152 | enum batadv_uev_action { |
73844a8c | 153 | /** @BATADV_UEV_ADD: gateway was selected (after none was selected) */ |
39c75a51 | 154 | BATADV_UEV_ADD = 0, |
73844a8c SE |
155 | |
156 | /** | |
157 | * @BATADV_UEV_DEL: selected gateway was removed and none is selected | |
158 | * anymore | |
159 | */ | |
39c75a51 | 160 | BATADV_UEV_DEL, |
73844a8c SE |
161 | |
162 | /** | |
163 | * @BATADV_UEV_CHANGE: a different gateway was selected as based gateway | |
164 | */ | |
39c75a51 | 165 | BATADV_UEV_CHANGE, |
73844a8c SE |
166 | |
167 | /** | |
168 | * @BATADV_UEV_LOOPDETECT: loop was detected which cannot be handled by | |
169 | * bridge loop avoidance | |
170 | */ | |
cd9c7bfb | 171 | BATADV_UEV_LOOPDETECT, |
c6bda689 AQ |
172 | }; |
173 | ||
73844a8c SE |
174 | /** |
175 | * enum batadv_uev_type - Type of uevent | |
176 | */ | |
39c75a51 | 177 | enum batadv_uev_type { |
73844a8c | 178 | /** @BATADV_UEV_GW: selected gateway was modified */ |
39c75a51 | 179 | BATADV_UEV_GW = 0, |
73844a8c SE |
180 | |
181 | /** @BATADV_UEV_BLA: bridge loop avoidance event */ | |
cd9c7bfb | 182 | BATADV_UEV_BLA, |
c6bda689 AQ |
183 | }; |
184 | ||
42d0b044 | 185 | #define BATADV_GW_THRESHOLD 50 |
43676ab5 | 186 | |
610bfc6b MH |
187 | /* Number of fragment chains for each orig_node */ |
188 | #define BATADV_FRAG_BUFFER_COUNT 8 | |
189 | /* Maximum number of fragments for one packet */ | |
190 | #define BATADV_FRAG_MAX_FRAGMENTS 16 | |
191 | /* Maxumim size of each fragment */ | |
8ea026b1 | 192 | #define BATADV_FRAG_MAX_FRAG_SIZE 1280 |
610bfc6b MH |
193 | /* Time to keep fragments while waiting for rest of the fragments */ |
194 | #define BATADV_FRAG_TIMEOUT 10000 | |
195 | ||
785ea114 AQ |
196 | #define BATADV_DAT_CANDIDATE_NOT_FOUND 0 |
197 | #define BATADV_DAT_CANDIDATE_ORIG 1 | |
198 | ||
21a1236b | 199 | /* Debug Messages */ |
c6c8fea2 SE |
200 | #ifdef pr_fmt |
201 | #undef pr_fmt | |
202 | #endif | |
6e215fd8 SE |
203 | /* Append 'batman-adv: ' before kernel messages */ |
204 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
c6c8fea2 | 205 | |
21a1236b | 206 | /* Kernel headers */ |
c6c8fea2 | 207 | |
47d4522d | 208 | #include <linux/atomic.h> |
1e2c2a4f | 209 | #include <linux/compiler.h> |
1e2c2a4f | 210 | #include <linux/etherdevice.h> |
fcafa5e7 SE |
211 | #include <linux/if_vlan.h> |
212 | #include <linux/jiffies.h> | |
68a600de | 213 | #include <linux/netdevice.h> |
fcafa5e7 | 214 | #include <linux/percpu.h> |
68a600de SE |
215 | #include <linux/seq_file.h> |
216 | #include <linux/skbuff.h> | |
1e2c2a4f | 217 | #include <linux/types.h> |
fec149f5 | 218 | #include <uapi/linux/batadv_packet.h> |
16052789 | 219 | |
c6c8fea2 | 220 | #include "types.h" |
68a600de | 221 | #include "main.h" |
1e2c2a4f | 222 | |
f7a2bd65 | 223 | /** |
7e9a8c2c | 224 | * batadv_print_vid() - return printable version of vid information |
f7a2bd65 SE |
225 | * @vid: the VLAN identifier |
226 | * | |
227 | * Return: -1 when no VLAN is used, VLAN id otherwise | |
228 | */ | |
229 | static inline int batadv_print_vid(unsigned short vid) | |
230 | { | |
231 | if (vid & BATADV_VLAN_HAS_TAG) | |
232 | return (int)(vid & VLAN_VID_MASK); | |
233 | else | |
234 | return -1; | |
235 | } | |
eb2deb6b | 236 | |
3193e8fd | 237 | extern struct list_head batadv_hardif_list; |
fb69be69 | 238 | extern unsigned int batadv_hardif_generation; |
3193e8fd SE |
239 | |
240 | extern unsigned char batadv_broadcast_addr[]; | |
241 | extern struct workqueue_struct *batadv_event_workqueue; | |
242 | ||
243 | int batadv_mesh_init(struct net_device *soft_iface); | |
244 | void batadv_mesh_free(struct net_device *soft_iface); | |
6b5e971a | 245 | bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr); |
30da63a6 ML |
246 | struct batadv_hard_iface * |
247 | batadv_seq_print_text_primary_if_get(struct seq_file *seq); | |
411d6ed9 | 248 | int batadv_max_header_len(void); |
c54f38c9 | 249 | void batadv_skb_set_priority(struct sk_buff *skb, int offset); |
3193e8fd SE |
250 | int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
251 | struct packet_type *ptype, | |
252 | struct net_device *orig_dev); | |
56303d34 | 253 | int |
6b5e971a | 254 | batadv_recv_handler_register(u8 packet_type, |
56303d34 SE |
255 | int (*recv_handler)(struct sk_buff *, |
256 | struct batadv_hard_iface *)); | |
6b5e971a | 257 | void batadv_recv_handler_unregister(u8 packet_type); |
95a066d8 | 258 | __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr); |
c6c8fea2 | 259 | |
62fe710f | 260 | /** |
7e9a8c2c | 261 | * batadv_compare_eth() - Compare two not u16 aligned Ethernet addresses |
7afcbbef SE |
262 | * @data1: Pointer to a six-byte array containing the Ethernet address |
263 | * @data2: Pointer other six-byte array containing the Ethernet address | |
39901e71 | 264 | * |
c3923b7a | 265 | * note: can't use ether_addr_equal() as it requires aligned memory |
62fe710f | 266 | * |
4b426b10 | 267 | * Return: true if they are the same ethernet addr |
39901e71 | 268 | */ |
f2d5cf2a | 269 | static inline bool batadv_compare_eth(const void *data1, const void *data2) |
39901e71 | 270 | { |
d9cd4fe5 | 271 | return ether_addr_equal_unaligned(data1, data2); |
39901e71 ML |
272 | } |
273 | ||
2c53040f | 274 | /** |
7e9a8c2c | 275 | * batadv_has_timed_out() - compares current time (jiffies) and timestamp + |
6d030de8 | 276 | * timeout |
a04ccd59 MH |
277 | * @timestamp: base value to compare with (in jiffies) |
278 | * @timeout: added to base value before comparing (in milliseconds) | |
279 | * | |
62fe710f | 280 | * Return: true if current time is after timestamp + timeout |
a04ccd59 | 281 | */ |
1eda58bf SE |
282 | static inline bool batadv_has_timed_out(unsigned long timestamp, |
283 | unsigned int timeout) | |
a04ccd59 MH |
284 | { |
285 | return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout)); | |
286 | } | |
747e4221 | 287 | |
e57acf8e SE |
288 | /** |
289 | * batadv_atomic_dec_not_zero() - Decrease unless the number is 0 | |
290 | * @v: pointer of type atomic_t | |
291 | * | |
292 | * Return: non-zero if v was not 0, and zero otherwise. | |
293 | */ | |
3e34819e | 294 | #define batadv_atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) |
5f657ec0 | 295 | |
e57acf8e SE |
296 | /** |
297 | * batadv_smallest_signed_int() - Returns the smallest signed integer in two's | |
298 | * complement with the sizeof x | |
299 | * @x: type of integer | |
300 | * | |
301 | * Return: smallest signed integer of type | |
302 | */ | |
3e34819e | 303 | #define batadv_smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u))) |
f5d33d37 | 304 | |
e57acf8e SE |
305 | /** |
306 | * batadv_seq_before() - Checks if a sequence number x is a predecessor of y | |
307 | * @x: potential predecessor of @y | |
308 | * @y: value to compare @x against | |
309 | * | |
310 | * It handles overflows/underflows and can correctly check for a predecessor | |
311 | * unless the variable sequence number has grown by more then | |
312 | * 2**(bitwidth(x)-1)-1. | |
313 | * | |
6b5e971a | 314 | * This means that for a u8 with the maximum value 255, it would think: |
e57acf8e SE |
315 | * |
316 | * * when adding nothing - it is neither a predecessor nor a successor | |
317 | * * before adding more than 127 to the starting value - it is a predecessor, | |
318 | * * when adding 128 - it is neither a predecessor nor a successor, | |
319 | * * after adding more than 127 to the starting value - it is a successor | |
320 | * | |
321 | * Return: true when x is a predecessor of y, false otherwise | |
9cfc7bd6 | 322 | */ |
84d0a394 SE |
323 | #define batadv_seq_before(x, y) ({ \ |
324 | typeof(x)_d1 = (x); \ | |
325 | typeof(y)_d2 = (y); \ | |
326 | typeof(x)_dummy = (_d1 - _d2); \ | |
327 | (void)(&_d1 == &_d2); \ | |
328 | _dummy > batadv_smallest_signed_int(_dummy); \ | |
329 | }) | |
e57acf8e SE |
330 | |
331 | /** | |
332 | * batadv_seq_after() - Checks if a sequence number x is a successor of y | |
333 | * @x: potential sucessor of @y | |
334 | * @y: value to compare @x against | |
335 | * | |
336 | * It handles overflows/underflows and can correctly check for a successor | |
337 | * unless the variable sequence number has grown by more then | |
338 | * 2**(bitwidth(x)-1)-1. | |
339 | * | |
340 | * This means that for a u8 with the maximum value 255, it would think: | |
341 | * | |
342 | * * when adding nothing - it is neither a predecessor nor a successor | |
343 | * * before adding more than 127 to the starting value - it is a predecessor, | |
344 | * * when adding 128 - it is neither a predecessor nor a successor, | |
345 | * * after adding more than 127 to the starting value - it is a successor | |
346 | * | |
347 | * Return: true when x is a successor of y, false otherwise | |
348 | */ | |
3e34819e | 349 | #define batadv_seq_after(x, y) batadv_seq_before(y, x) |
f5d33d37 | 350 | |
e57acf8e SE |
351 | /** |
352 | * batadv_add_counter() - Add to per cpu statistics counter of soft interface | |
353 | * @bat_priv: the bat priv with all the soft interface information | |
354 | * @idx: counter index which should be modified | |
355 | * @count: value to increase counter by | |
356 | * | |
357 | * Stop preemption on local cpu while incrementing the counter | |
358 | */ | |
56303d34 | 359 | static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx, |
f8214865 MH |
360 | size_t count) |
361 | { | |
56917443 | 362 | this_cpu_add(bat_priv->bat_counters[idx], count); |
f8214865 MH |
363 | } |
364 | ||
e57acf8e SE |
365 | /** |
366 | * batadv_inc_counter() - Increase per cpu statistics counter of soft interface | |
367 | * @b: the bat priv with all the soft interface information | |
368 | * @i: counter index which should be modified | |
369 | */ | |
f8214865 MH |
370 | #define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1) |
371 | ||
e57acf8e SE |
372 | /** |
373 | * BATADV_SKB_CB() - Get batadv_skb_cb from skb control buffer | |
374 | * @__skb: skb holding the control buffer | |
375 | * | |
376 | * The members of the control buffer are defined in struct batadv_skb_cb in | |
377 | * types.h. The macro is inspired by the similar macro TCP_SKB_CB() in tcp.h. | |
378 | * | |
379 | * Return: pointer to the batadv_skb_cb of the skb | |
3c12de9a MH |
380 | */ |
381 | #define BATADV_SKB_CB(__skb) ((struct batadv_skb_cb *)&((__skb)->cb[0])) | |
382 | ||
c018ad3d | 383 | unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len); |
eceb22ae | 384 | bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid); |
0fa4c30d SE |
385 | int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type, |
386 | enum batadv_uev_action action, const char *data); | |
ef261577 | 387 | |
c6c8fea2 | 388 | #endif /* _NET_BATMAN_ADV_MAIN_H_ */ |