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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
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 | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #ifndef _NET_BATMAN_ADV_MAIN_H_ | |
21 | #define _NET_BATMAN_ADV_MAIN_H_ | |
22 | ||
42d0b044 SE |
23 | #define BATADV_DRIVER_AUTHOR "Marek Lindner <lindner_marek@yahoo.de>, " \ |
24 | "Simon Wunderlich <siwu@hrz.tu-chemnitz.de>" | |
25 | #define BATADV_DRIVER_DESC "B.A.T.M.A.N. advanced" | |
26 | #define BATADV_DRIVER_DEVICE "batman-adv" | |
c6c8fea2 | 27 | |
42d0b044 | 28 | #ifndef BATADV_SOURCE_VERSION |
c00a072d | 29 | #define BATADV_SOURCE_VERSION "2013.4.0" |
44c4349a | 30 | #endif |
c6c8fea2 SE |
31 | |
32 | /* B.A.T.M.A.N. parameters */ | |
33 | ||
42d0b044 SE |
34 | #define BATADV_TQ_MAX_VALUE 255 |
35 | #define BATADV_JITTER 20 | |
c6c8fea2 | 36 | |
9cfc7bd6 | 37 | /* Time To Live of broadcast messages */ |
42d0b044 | 38 | #define BATADV_TTL 50 |
6e215fd8 SE |
39 | |
40 | /* purge originators after time in seconds if no valid packet comes in | |
42d0b044 | 41 | * -> TODO: check influence on BATADV_TQ_LOCAL_WINDOW_SIZE |
9cfc7bd6 | 42 | */ |
42d0b044 | 43 | #define BATADV_PURGE_TIMEOUT 200000 /* 200 seconds */ |
7cf4d520 | 44 | #define BATADV_TT_LOCAL_TIMEOUT 600000 /* in milliseconds */ |
a51fb9b2 | 45 | #define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 /* in milliseconds */ |
30cfd02b | 46 | #define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 /* in milliseconds */ |
72414442 AQ |
47 | #define BATADV_TT_WORK_PERIOD 5000 /* 5 seconds */ |
48 | #define BATADV_ORIG_WORK_PERIOD 1000 /* 1 second */ | |
2f1dfbe1 | 49 | #define BATADV_DAT_ENTRY_TIMEOUT (5*60000) /* 5 mins in milliseconds */ |
015758d0 | 50 | /* sliding packet range of received originator messages in sequence numbers |
9cfc7bd6 SE |
51 | * (should be a multiple of our word size) |
52 | */ | |
42d0b044 | 53 | #define BATADV_TQ_LOCAL_WINDOW_SIZE 64 |
a51fb9b2 | 54 | /* milliseconds we have to keep pending tt_req */ |
42d0b044 | 55 | #define BATADV_TT_REQUEST_TIMEOUT 3000 |
a73105b8 | 56 | |
42d0b044 SE |
57 | #define BATADV_TQ_GLOBAL_WINDOW_SIZE 5 |
58 | #define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM 1 | |
59 | #define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM 1 | |
60 | #define BATADV_TQ_TOTAL_BIDRECT_LIMIT 1 | |
c6c8fea2 | 61 | |
42d0b044 SE |
62 | /* number of OGMs sent with the last tt diff */ |
63 | #define BATADV_TT_OGM_APPEND_MAX 3 | |
a73105b8 | 64 | |
9cfc7bd6 | 65 | /* Time in which a client can roam at most ROAMING_MAX_COUNT times in |
a51fb9b2 | 66 | * milliseconds |
9cfc7bd6 | 67 | */ |
42d0b044 SE |
68 | #define BATADV_ROAMING_MAX_TIME 20000 |
69 | #define BATADV_ROAMING_MAX_COUNT 5 | |
cc47f66e | 70 | |
42d0b044 | 71 | #define BATADV_NO_FLAGS 0 |
ecbd5321 | 72 | |
42d0b044 | 73 | #define BATADV_NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */ |
bc279080 | 74 | |
42d0b044 | 75 | #define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE) |
c6c8fea2 | 76 | |
42d0b044 | 77 | #define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */ |
c6c8fea2 | 78 | |
caf65bfc MS |
79 | /* number of packets to send for broadcasts on different interface types */ |
80 | #define BATADV_NUM_BCASTS_DEFAULT 1 | |
81 | #define BATADV_NUM_BCASTS_WIRELESS 3 | |
82 | #define BATADV_NUM_BCASTS_MAX 3 | |
83 | ||
c384ea3e AQ |
84 | /* msecs after which an ARP_REQUEST is sent in broadcast as fallback */ |
85 | #define ARP_REQ_DELAY 250 | |
785ea114 AQ |
86 | /* numbers of originator to contact for any PUT/GET DHT operation */ |
87 | #define BATADV_DAT_CANDIDATES_NUM 3 | |
88 | ||
6e215fd8 | 89 | /* how much worse secondary interfaces may be to be considered as bonding |
9cfc7bd6 SE |
90 | * candidates |
91 | */ | |
42d0b044 | 92 | #define BATADV_BONDING_TQ_THRESHOLD 50 |
c6c8fea2 | 93 | |
6e215fd8 | 94 | /* should not be bigger than 512 bytes or change the size of |
9cfc7bd6 SE |
95 | * forw_packet->direct_link_flags |
96 | */ | |
42d0b044 SE |
97 | #define BATADV_MAX_AGGREGATION_BYTES 512 |
98 | #define BATADV_MAX_AGGREGATION_MS 100 | |
c6c8fea2 | 99 | |
42d0b044 SE |
100 | #define BATADV_BLA_PERIOD_LENGTH 10000 /* 10 seconds */ |
101 | #define BATADV_BLA_BACKBONE_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 3) | |
102 | #define BATADV_BLA_CLAIM_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 10) | |
28709878 | 103 | #define BATADV_BLA_WAIT_PERIODS 3 |
fe2da6ff | 104 | |
42d0b044 SE |
105 | #define BATADV_DUPLIST_SIZE 16 |
106 | #define BATADV_DUPLIST_TIMEOUT 500 /* 500 ms */ | |
6e215fd8 | 107 | /* don't reset again within 30 seconds */ |
42d0b044 SE |
108 | #define BATADV_RESET_PROTECTION_MS 30000 |
109 | #define BATADV_EXPECTED_SEQNO_RANGE 65536 | |
c6c8fea2 | 110 | |
d56b1705 MH |
111 | #define BATADV_NC_NODE_TIMEOUT 10000 /* Milliseconds */ |
112 | ||
39c75a51 SE |
113 | enum batadv_mesh_state { |
114 | BATADV_MESH_INACTIVE, | |
115 | BATADV_MESH_ACTIVE, | |
116 | BATADV_MESH_DEACTIVATING, | |
e8958dbf | 117 | }; |
c6c8fea2 | 118 | |
42d0b044 SE |
119 | #define BATADV_BCAST_QUEUE_LEN 256 |
120 | #define BATADV_BATMAN_QUEUE_LEN 256 | |
c6c8fea2 | 121 | |
39c75a51 SE |
122 | enum batadv_uev_action { |
123 | BATADV_UEV_ADD = 0, | |
124 | BATADV_UEV_DEL, | |
125 | BATADV_UEV_CHANGE, | |
c6bda689 AQ |
126 | }; |
127 | ||
39c75a51 SE |
128 | enum batadv_uev_type { |
129 | BATADV_UEV_GW = 0, | |
c6bda689 AQ |
130 | }; |
131 | ||
42d0b044 | 132 | #define BATADV_GW_THRESHOLD 50 |
43676ab5 | 133 | |
610bfc6b MH |
134 | /* Number of fragment chains for each orig_node */ |
135 | #define BATADV_FRAG_BUFFER_COUNT 8 | |
136 | /* Maximum number of fragments for one packet */ | |
137 | #define BATADV_FRAG_MAX_FRAGMENTS 16 | |
138 | /* Maxumim size of each fragment */ | |
139 | #define BATADV_FRAG_MAX_FRAG_SIZE 1400 | |
140 | /* Time to keep fragments while waiting for rest of the fragments */ | |
141 | #define BATADV_FRAG_TIMEOUT 10000 | |
142 | ||
785ea114 AQ |
143 | #define BATADV_DAT_CANDIDATE_NOT_FOUND 0 |
144 | #define BATADV_DAT_CANDIDATE_ORIG 1 | |
145 | ||
21a1236b | 146 | /* Debug Messages */ |
c6c8fea2 SE |
147 | #ifdef pr_fmt |
148 | #undef pr_fmt | |
149 | #endif | |
6e215fd8 SE |
150 | /* Append 'batman-adv: ' before kernel messages */ |
151 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
c6c8fea2 | 152 | |
21a1236b | 153 | /* Kernel headers */ |
c6c8fea2 SE |
154 | |
155 | #include <linux/mutex.h> /* mutex */ | |
156 | #include <linux/module.h> /* needed by all modules */ | |
157 | #include <linux/netdevice.h> /* netdevice */ | |
015758d0 | 158 | #include <linux/etherdevice.h> /* ethernet address classification */ |
c6c8fea2 SE |
159 | #include <linux/if_ether.h> /* ethernet header */ |
160 | #include <linux/poll.h> /* poll_table */ | |
161 | #include <linux/kthread.h> /* kernel threads */ | |
162 | #include <linux/pkt_sched.h> /* schedule types */ | |
163 | #include <linux/workqueue.h> /* workqueue */ | |
f8214865 | 164 | #include <linux/percpu.h> |
c6c8fea2 SE |
165 | #include <linux/slab.h> |
166 | #include <net/sock.h> /* struct sock */ | |
a4ac28c0 | 167 | #include <net/rtnetlink.h> |
c6c8fea2 SE |
168 | #include <linux/jiffies.h> |
169 | #include <linux/seq_file.h> | |
170 | #include "types.h" | |
171 | ||
eb2deb6b AQ |
172 | /** |
173 | * batadv_vlan_flags - flags for the four MSB of any vlan ID field | |
174 | * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not | |
175 | */ | |
176 | enum batadv_vlan_flags { | |
177 | BATADV_VLAN_HAS_TAG = BIT(15), | |
178 | }; | |
179 | ||
180 | #define BATADV_PRINT_VID(vid) (vid & BATADV_VLAN_HAS_TAG ? \ | |
181 | (int)(vid & VLAN_VID_MASK) : -1) | |
182 | ||
3193e8fd SE |
183 | extern char batadv_routing_algo[]; |
184 | extern struct list_head batadv_hardif_list; | |
185 | ||
186 | extern unsigned char batadv_broadcast_addr[]; | |
187 | extern struct workqueue_struct *batadv_event_workqueue; | |
188 | ||
189 | int batadv_mesh_init(struct net_device *soft_iface); | |
190 | void batadv_mesh_free(struct net_device *soft_iface); | |
fe8a93b9 | 191 | int batadv_is_my_mac(struct batadv_priv *bat_priv, const uint8_t *addr); |
30da63a6 ML |
192 | struct batadv_hard_iface * |
193 | batadv_seq_print_text_primary_if_get(struct seq_file *seq); | |
c54f38c9 | 194 | void batadv_skb_set_priority(struct sk_buff *skb, int offset); |
3193e8fd SE |
195 | int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
196 | struct packet_type *ptype, | |
197 | struct net_device *orig_dev); | |
56303d34 SE |
198 | int |
199 | batadv_recv_handler_register(uint8_t packet_type, | |
200 | int (*recv_handler)(struct sk_buff *, | |
201 | struct batadv_hard_iface *)); | |
3193e8fd | 202 | void batadv_recv_handler_unregister(uint8_t packet_type); |
56303d34 SE |
203 | int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops); |
204 | int batadv_algo_select(struct batadv_priv *bat_priv, char *name); | |
3193e8fd | 205 | int batadv_algo_seq_print_text(struct seq_file *seq, void *offset); |
95a066d8 | 206 | __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr); |
c6c8fea2 | 207 | |
0aca86cd AQ |
208 | /** |
209 | * enum batadv_dbg_level - available log levels | |
210 | * @BATADV_DBG_BATMAN: OGM and TQ computations related messages | |
211 | * @BATADV_DBG_ROUTES: route added / changed / deleted | |
212 | * @BATADV_DBG_TT: translation table messages | |
213 | * @BATADV_DBG_BLA: bridge loop avoidance messages | |
0e861a3c | 214 | * @BATADV_DBG_DAT: ARP snooping and DAT related messages |
d353d8d4 | 215 | * @BATADV_DBG_NC: network coding related messages |
0aca86cd AQ |
216 | * @BATADV_DBG_ALL: the union of all the above log levels |
217 | */ | |
8de47de5 SE |
218 | enum batadv_dbg_level { |
219 | BATADV_DBG_BATMAN = BIT(0), | |
0aca86cd AQ |
220 | BATADV_DBG_ROUTES = BIT(1), |
221 | BATADV_DBG_TT = BIT(2), | |
222 | BATADV_DBG_BLA = BIT(3), | |
0e861a3c | 223 | BATADV_DBG_DAT = BIT(4), |
d353d8d4 MH |
224 | BATADV_DBG_NC = BIT(5), |
225 | BATADV_DBG_ALL = 63, | |
8de47de5 SE |
226 | }; |
227 | ||
c6c8fea2 | 228 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
56303d34 | 229 | int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...) |
40a072d7 | 230 | __printf(2, 3); |
c6c8fea2 | 231 | |
1eda58bf | 232 | #define batadv_dbg(type, bat_priv, fmt, arg...) \ |
c6c8fea2 SE |
233 | do { \ |
234 | if (atomic_read(&bat_priv->log_level) & type) \ | |
40a072d7 | 235 | batadv_debug_log(bat_priv, fmt, ## arg);\ |
c6c8fea2 SE |
236 | } \ |
237 | while (0) | |
238 | #else /* !CONFIG_BATMAN_ADV_DEBUG */ | |
d3a547be | 239 | __printf(3, 4) |
1eda58bf | 240 | static inline void batadv_dbg(int type __always_unused, |
56303d34 | 241 | struct batadv_priv *bat_priv __always_unused, |
1eda58bf | 242 | const char *fmt __always_unused, ...) |
c6c8fea2 SE |
243 | { |
244 | } | |
245 | #endif | |
246 | ||
3e34819e | 247 | #define batadv_info(net_dev, fmt, arg...) \ |
c6c8fea2 SE |
248 | do { \ |
249 | struct net_device *_netdev = (net_dev); \ | |
56303d34 | 250 | struct batadv_priv *_batpriv = netdev_priv(_netdev); \ |
39c75a51 | 251 | batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg); \ |
c6c8fea2 SE |
252 | pr_info("%s: " fmt, _netdev->name, ## arg); \ |
253 | } while (0) | |
3e34819e | 254 | #define batadv_err(net_dev, fmt, arg...) \ |
c6c8fea2 SE |
255 | do { \ |
256 | struct net_device *_netdev = (net_dev); \ | |
56303d34 | 257 | struct batadv_priv *_batpriv = netdev_priv(_netdev); \ |
39c75a51 | 258 | batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg); \ |
c6c8fea2 SE |
259 | pr_err("%s: " fmt, _netdev->name, ## arg); \ |
260 | } while (0) | |
261 | ||
9cfc7bd6 | 262 | /* returns 1 if they are the same ethernet addr |
39901e71 | 263 | * |
c3923b7a | 264 | * note: can't use ether_addr_equal() as it requires aligned memory |
39901e71 | 265 | */ |
1eda58bf | 266 | static inline int batadv_compare_eth(const void *data1, const void *data2) |
39901e71 ML |
267 | { |
268 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
269 | } | |
270 | ||
2c53040f BH |
271 | /** |
272 | * has_timed_out - compares current time (jiffies) and timestamp + timeout | |
a04ccd59 MH |
273 | * @timestamp: base value to compare with (in jiffies) |
274 | * @timeout: added to base value before comparing (in milliseconds) | |
275 | * | |
276 | * Returns true if current time is after timestamp + timeout | |
277 | */ | |
1eda58bf SE |
278 | static inline bool batadv_has_timed_out(unsigned long timestamp, |
279 | unsigned int timeout) | |
a04ccd59 MH |
280 | { |
281 | return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout)); | |
282 | } | |
747e4221 | 283 | |
3e34819e | 284 | #define batadv_atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) |
5f657ec0 | 285 | |
f5d33d37 | 286 | /* Returns the smallest signed integer in two's complement with the sizeof x */ |
3e34819e | 287 | #define batadv_smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u))) |
f5d33d37 AQ |
288 | |
289 | /* Checks if a sequence number x is a predecessor/successor of y. | |
290 | * they handle overflows/underflows and can correctly check for a | |
291 | * predecessor/successor unless the variable sequence number has grown by | |
292 | * more then 2**(bitwidth(x)-1)-1. | |
293 | * This means that for a uint8_t with the maximum value 255, it would think: | |
294 | * - when adding nothing - it is neither a predecessor nor a successor | |
295 | * - before adding more than 127 to the starting value - it is a predecessor, | |
296 | * - when adding 128 - it is neither a predecessor nor a successor, | |
9cfc7bd6 SE |
297 | * - after adding more than 127 to the starting value - it is a successor |
298 | */ | |
3e34819e SE |
299 | #define batadv_seq_before(x, y) ({typeof(x) _d1 = (x); \ |
300 | typeof(y) _d2 = (y); \ | |
301 | typeof(x) _dummy = (_d1 - _d2); \ | |
302 | (void) (&_d1 == &_d2); \ | |
303 | _dummy > batadv_smallest_signed_int(_dummy); }) | |
304 | #define batadv_seq_after(x, y) batadv_seq_before(y, x) | |
f5d33d37 | 305 | |
f8214865 | 306 | /* Stop preemption on local cpu while incrementing the counter */ |
56303d34 | 307 | static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx, |
f8214865 MH |
308 | size_t count) |
309 | { | |
56917443 | 310 | this_cpu_add(bat_priv->bat_counters[idx], count); |
f8214865 MH |
311 | } |
312 | ||
313 | #define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1) | |
314 | ||
315 | /* Sum and return the cpu-local counters for index 'idx' */ | |
56303d34 SE |
316 | static inline uint64_t batadv_sum_counter(struct batadv_priv *bat_priv, |
317 | size_t idx) | |
f8214865 | 318 | { |
0c5e45b6 | 319 | uint64_t *counters, sum = 0; |
f8214865 | 320 | int cpu; |
f8214865 MH |
321 | |
322 | for_each_possible_cpu(cpu) { | |
323 | counters = per_cpu_ptr(bat_priv->bat_counters, cpu); | |
324 | sum += counters[idx]; | |
325 | } | |
326 | ||
327 | return sum; | |
328 | } | |
329 | ||
3c12de9a MH |
330 | /* Define a macro to reach the control buffer of the skb. The members of the |
331 | * control buffer are defined in struct batadv_skb_cb in types.h. | |
332 | * The macro is inspired by the similar macro TCP_SKB_CB() in tcp.h. | |
333 | */ | |
334 | #define BATADV_SKB_CB(__skb) ((struct batadv_skb_cb *)&((__skb)->cb[0])) | |
335 | ||
ef261577 ML |
336 | void batadv_tvlv_container_register(struct batadv_priv *bat_priv, |
337 | uint8_t type, uint8_t version, | |
338 | void *tvlv_value, uint16_t tvlv_value_len); | |
339 | uint16_t batadv_tvlv_container_ogm_append(struct batadv_priv *bat_priv, | |
340 | unsigned char **packet_buff, | |
341 | int *packet_buff_len, | |
342 | int packet_min_len); | |
343 | void batadv_tvlv_ogm_receive(struct batadv_priv *bat_priv, | |
344 | struct batadv_ogm_packet *batadv_ogm_packet, | |
345 | struct batadv_orig_node *orig_node); | |
346 | void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv, | |
347 | uint8_t type, uint8_t version); | |
348 | ||
349 | void batadv_tvlv_handler_register(struct batadv_priv *bat_priv, | |
350 | void (*optr)(struct batadv_priv *bat_priv, | |
351 | struct batadv_orig_node *orig, | |
352 | uint8_t flags, | |
353 | void *tvlv_value, | |
354 | uint16_t tvlv_value_len), | |
355 | int (*uptr)(struct batadv_priv *bat_priv, | |
356 | uint8_t *src, uint8_t *dst, | |
357 | void *tvlv_value, | |
358 | uint16_t tvlv_value_len), | |
359 | uint8_t type, uint8_t version, uint8_t flags); | |
360 | void batadv_tvlv_handler_unregister(struct batadv_priv *bat_priv, | |
361 | uint8_t type, uint8_t version); | |
362 | int batadv_tvlv_containers_process(struct batadv_priv *bat_priv, | |
363 | bool ogm_source, | |
364 | struct batadv_orig_node *orig_node, | |
365 | uint8_t *src, uint8_t *dst, | |
366 | void *tvlv_buff, uint16_t tvlv_buff_len); | |
367 | void batadv_tvlv_unicast_send(struct batadv_priv *bat_priv, uint8_t *src, | |
368 | uint8_t *dst, uint8_t type, uint8_t version, | |
369 | void *tvlv_value, uint16_t tvlv_value_len); | |
370 | ||
c6c8fea2 | 371 | #endif /* _NET_BATMAN_ADV_MAIN_H_ */ |