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0046b040 | 1 | /* Copyright (C) 2007-2016 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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
18 | #ifndef _NET_BATMAN_ADV_MAIN_H_ | |
19 | #define _NET_BATMAN_ADV_MAIN_H_ | |
20 | ||
bc58eeef | 21 | #define BATADV_DRIVER_AUTHOR "Marek Lindner <mareklindner@neomailbox.ch>, " \ |
c679ff8f | 22 | "Simon Wunderlich <sw@simonwunderlich.de>" |
42d0b044 SE |
23 | #define BATADV_DRIVER_DESC "B.A.T.M.A.N. advanced" |
24 | #define BATADV_DRIVER_DEVICE "batman-adv" | |
c6c8fea2 | 25 | |
42d0b044 | 26 | #ifndef BATADV_SOURCE_VERSION |
7bed2ab8 | 27 | #define BATADV_SOURCE_VERSION "2016.3" |
44c4349a | 28 | #endif |
c6c8fea2 SE |
29 | |
30 | /* B.A.T.M.A.N. parameters */ | |
31 | ||
42d0b044 | 32 | #define BATADV_TQ_MAX_VALUE 255 |
0da00359 | 33 | #define BATADV_THROUGHPUT_MAX_VALUE 0xFFFFFFFF |
42d0b044 | 34 | #define BATADV_JITTER 20 |
c6c8fea2 | 35 | |
9cfc7bd6 | 36 | /* Time To Live of broadcast messages */ |
42d0b044 | 37 | #define BATADV_TTL 50 |
6e215fd8 | 38 | |
81f02683 SW |
39 | /* maximum sequence number age of broadcast messages */ |
40 | #define BATADV_BCAST_MAX_AGE 64 | |
41 | ||
6e215fd8 | 42 | /* purge originators after time in seconds if no valid packet comes in |
42d0b044 | 43 | * -> TODO: check influence on BATADV_TQ_LOCAL_WINDOW_SIZE |
9cfc7bd6 | 44 | */ |
42d0b044 | 45 | #define BATADV_PURGE_TIMEOUT 200000 /* 200 seconds */ |
7cf4d520 | 46 | #define BATADV_TT_LOCAL_TIMEOUT 600000 /* in milliseconds */ |
a51fb9b2 | 47 | #define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 /* in milliseconds */ |
30cfd02b | 48 | #define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 /* in milliseconds */ |
72414442 AQ |
49 | #define BATADV_TT_WORK_PERIOD 5000 /* 5 seconds */ |
50 | #define BATADV_ORIG_WORK_PERIOD 1000 /* 1 second */ | |
fc1f8693 | 51 | #define BATADV_DAT_ENTRY_TIMEOUT (5 * 60000) /* 5 mins in milliseconds */ |
015758d0 | 52 | /* sliding packet range of received originator messages in sequence numbers |
9cfc7bd6 SE |
53 | * (should be a multiple of our word size) |
54 | */ | |
42d0b044 | 55 | #define BATADV_TQ_LOCAL_WINDOW_SIZE 64 |
a51fb9b2 | 56 | /* milliseconds we have to keep pending tt_req */ |
42d0b044 | 57 | #define BATADV_TT_REQUEST_TIMEOUT 3000 |
a73105b8 | 58 | |
42d0b044 SE |
59 | #define BATADV_TQ_GLOBAL_WINDOW_SIZE 5 |
60 | #define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM 1 | |
61 | #define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM 1 | |
62 | #define BATADV_TQ_TOTAL_BIDRECT_LIMIT 1 | |
c6c8fea2 | 63 | |
162bd64c | 64 | /* B.A.T.M.A.N. V */ |
c833484e | 65 | #define BATADV_THROUGHPUT_DEFAULT_VALUE 10 /* 1 Mbps */ |
8d2d499e AQ |
66 | #define BATADV_ELP_PROBES_PER_NODE 2 |
67 | #define BATADV_ELP_MIN_PROBE_SIZE 200 /* bytes */ | |
68 | #define BATADV_ELP_PROBE_MAX_TX_DIFF 100 /* milliseconds */ | |
162bd64c | 69 | #define BATADV_ELP_MAX_AGE 64 |
9323158e AQ |
70 | #define BATADV_OGM_MAX_ORIGDIFF 5 |
71 | #define BATADV_OGM_MAX_AGE 64 | |
162bd64c | 72 | |
42d0b044 SE |
73 | /* number of OGMs sent with the last tt diff */ |
74 | #define BATADV_TT_OGM_APPEND_MAX 3 | |
a73105b8 | 75 | |
9cfc7bd6 | 76 | /* Time in which a client can roam at most ROAMING_MAX_COUNT times in |
a51fb9b2 | 77 | * milliseconds |
9cfc7bd6 | 78 | */ |
42d0b044 SE |
79 | #define BATADV_ROAMING_MAX_TIME 20000 |
80 | #define BATADV_ROAMING_MAX_COUNT 5 | |
cc47f66e | 81 | |
42d0b044 | 82 | #define BATADV_NO_FLAGS 0 |
ecbd5321 | 83 | |
42d0b044 | 84 | #define BATADV_NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */ |
bc279080 | 85 | |
9464d071 AQ |
86 | #define BATADV_NO_MARK 0 |
87 | ||
89652331 SW |
88 | /* default interface for multi interface operation. The default interface is |
89 | * used for communication which originated locally (i.e. is not forwarded) | |
90 | * or where special forwarding is not desired/necessary. | |
91 | */ | |
92 | #define BATADV_IF_DEFAULT ((struct batadv_hard_iface *)NULL) | |
93 | ||
42d0b044 | 94 | #define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE) |
c6c8fea2 | 95 | |
42d0b044 | 96 | #define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */ |
c6c8fea2 | 97 | |
caf65bfc MS |
98 | /* number of packets to send for broadcasts on different interface types */ |
99 | #define BATADV_NUM_BCASTS_DEFAULT 1 | |
100 | #define BATADV_NUM_BCASTS_WIRELESS 3 | |
101 | #define BATADV_NUM_BCASTS_MAX 3 | |
102 | ||
c384ea3e AQ |
103 | /* msecs after which an ARP_REQUEST is sent in broadcast as fallback */ |
104 | #define ARP_REQ_DELAY 250 | |
785ea114 AQ |
105 | /* numbers of originator to contact for any PUT/GET DHT operation */ |
106 | #define BATADV_DAT_CANDIDATES_NUM 3 | |
107 | ||
a0e28775 MH |
108 | /* BATADV_TQ_SIMILARITY_THRESHOLD - TQ points that a secondary metric can differ |
109 | * at most from the primary one in order to be still considered acceptable | |
c43c981e AQ |
110 | */ |
111 | #define BATADV_TQ_SIMILARITY_THRESHOLD 50 | |
112 | ||
6e215fd8 | 113 | /* should not be bigger than 512 bytes or change the size of |
9cfc7bd6 SE |
114 | * forw_packet->direct_link_flags |
115 | */ | |
42d0b044 SE |
116 | #define BATADV_MAX_AGGREGATION_BYTES 512 |
117 | #define BATADV_MAX_AGGREGATION_MS 100 | |
c6c8fea2 | 118 | |
42d0b044 | 119 | #define BATADV_BLA_PERIOD_LENGTH 10000 /* 10 seconds */ |
e1544f3c | 120 | #define BATADV_BLA_BACKBONE_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 6) |
42d0b044 | 121 | #define BATADV_BLA_CLAIM_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 10) |
28709878 | 122 | #define BATADV_BLA_WAIT_PERIODS 3 |
cd9c7bfb SW |
123 | #define BATADV_BLA_LOOPDETECT_PERIODS 6 |
124 | #define BATADV_BLA_LOOPDETECT_TIMEOUT 3000 /* 3 seconds */ | |
fe2da6ff | 125 | |
42d0b044 SE |
126 | #define BATADV_DUPLIST_SIZE 16 |
127 | #define BATADV_DUPLIST_TIMEOUT 500 /* 500 ms */ | |
6e215fd8 | 128 | /* don't reset again within 30 seconds */ |
42d0b044 SE |
129 | #define BATADV_RESET_PROTECTION_MS 30000 |
130 | #define BATADV_EXPECTED_SEQNO_RANGE 65536 | |
c6c8fea2 | 131 | |
d56b1705 MH |
132 | #define BATADV_NC_NODE_TIMEOUT 10000 /* Milliseconds */ |
133 | ||
39c75a51 SE |
134 | enum batadv_mesh_state { |
135 | BATADV_MESH_INACTIVE, | |
136 | BATADV_MESH_ACTIVE, | |
137 | BATADV_MESH_DEACTIVATING, | |
e8958dbf | 138 | }; |
c6c8fea2 | 139 | |
42d0b044 SE |
140 | #define BATADV_BCAST_QUEUE_LEN 256 |
141 | #define BATADV_BATMAN_QUEUE_LEN 256 | |
c6c8fea2 | 142 | |
39c75a51 SE |
143 | enum batadv_uev_action { |
144 | BATADV_UEV_ADD = 0, | |
145 | BATADV_UEV_DEL, | |
146 | BATADV_UEV_CHANGE, | |
cd9c7bfb | 147 | BATADV_UEV_LOOPDETECT, |
c6bda689 AQ |
148 | }; |
149 | ||
39c75a51 SE |
150 | enum batadv_uev_type { |
151 | BATADV_UEV_GW = 0, | |
cd9c7bfb | 152 | BATADV_UEV_BLA, |
c6bda689 AQ |
153 | }; |
154 | ||
42d0b044 | 155 | #define BATADV_GW_THRESHOLD 50 |
43676ab5 | 156 | |
610bfc6b MH |
157 | /* Number of fragment chains for each orig_node */ |
158 | #define BATADV_FRAG_BUFFER_COUNT 8 | |
159 | /* Maximum number of fragments for one packet */ | |
160 | #define BATADV_FRAG_MAX_FRAGMENTS 16 | |
161 | /* Maxumim size of each fragment */ | |
162 | #define BATADV_FRAG_MAX_FRAG_SIZE 1400 | |
163 | /* Time to keep fragments while waiting for rest of the fragments */ | |
164 | #define BATADV_FRAG_TIMEOUT 10000 | |
165 | ||
785ea114 AQ |
166 | #define BATADV_DAT_CANDIDATE_NOT_FOUND 0 |
167 | #define BATADV_DAT_CANDIDATE_ORIG 1 | |
168 | ||
21a1236b | 169 | /* Debug Messages */ |
c6c8fea2 SE |
170 | #ifdef pr_fmt |
171 | #undef pr_fmt | |
172 | #endif | |
6e215fd8 SE |
173 | /* Append 'batman-adv: ' before kernel messages */ |
174 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
c6c8fea2 | 175 | |
21a1236b | 176 | /* Kernel headers */ |
c6c8fea2 | 177 | |
1e2c2a4f SE |
178 | #include <linux/bitops.h> /* for packet.h */ |
179 | #include <linux/compiler.h> | |
180 | #include <linux/cpumask.h> | |
181 | #include <linux/etherdevice.h> | |
182 | #include <linux/if_ether.h> /* for packet.h */ | |
fcafa5e7 SE |
183 | #include <linux/if_vlan.h> |
184 | #include <linux/jiffies.h> | |
fcafa5e7 | 185 | #include <linux/percpu.h> |
1e2c2a4f | 186 | #include <linux/types.h> |
16052789 | 187 | |
c6c8fea2 SE |
188 | #include "types.h" |
189 | ||
ba412080 SE |
190 | struct net_device; |
191 | struct packet_type; | |
1e2c2a4f SE |
192 | struct seq_file; |
193 | struct sk_buff; | |
194 | ||
a2f2b6cd | 195 | #define BATADV_PRINT_VID(vid) ((vid & BATADV_VLAN_HAS_TAG) ? \ |
eb2deb6b AQ |
196 | (int)(vid & VLAN_VID_MASK) : -1) |
197 | ||
3193e8fd SE |
198 | extern struct list_head batadv_hardif_list; |
199 | ||
200 | extern unsigned char batadv_broadcast_addr[]; | |
201 | extern struct workqueue_struct *batadv_event_workqueue; | |
202 | ||
203 | int batadv_mesh_init(struct net_device *soft_iface); | |
204 | void batadv_mesh_free(struct net_device *soft_iface); | |
6b5e971a | 205 | bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr); |
30da63a6 ML |
206 | struct batadv_hard_iface * |
207 | batadv_seq_print_text_primary_if_get(struct seq_file *seq); | |
411d6ed9 | 208 | int batadv_max_header_len(void); |
c54f38c9 | 209 | void batadv_skb_set_priority(struct sk_buff *skb, int offset); |
3193e8fd SE |
210 | int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
211 | struct packet_type *ptype, | |
212 | struct net_device *orig_dev); | |
56303d34 | 213 | int |
6b5e971a | 214 | batadv_recv_handler_register(u8 packet_type, |
56303d34 SE |
215 | int (*recv_handler)(struct sk_buff *, |
216 | struct batadv_hard_iface *)); | |
6b5e971a | 217 | void batadv_recv_handler_unregister(u8 packet_type); |
95a066d8 | 218 | __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr); |
c6c8fea2 | 219 | |
62fe710f SE |
220 | /** |
221 | * batadv_compare_eth - Compare two not u16 aligned Ethernet addresses | |
7afcbbef SE |
222 | * @data1: Pointer to a six-byte array containing the Ethernet address |
223 | * @data2: Pointer other six-byte array containing the Ethernet address | |
39901e71 | 224 | * |
c3923b7a | 225 | * note: can't use ether_addr_equal() as it requires aligned memory |
62fe710f | 226 | * |
4b426b10 | 227 | * Return: true if they are the same ethernet addr |
39901e71 | 228 | */ |
f2d5cf2a | 229 | static inline bool batadv_compare_eth(const void *data1, const void *data2) |
39901e71 | 230 | { |
d9cd4fe5 | 231 | return ether_addr_equal_unaligned(data1, data2); |
39901e71 ML |
232 | } |
233 | ||
2c53040f | 234 | /** |
6d030de8 AQ |
235 | * batadv_has_timed_out - compares current time (jiffies) and timestamp + |
236 | * timeout | |
a04ccd59 MH |
237 | * @timestamp: base value to compare with (in jiffies) |
238 | * @timeout: added to base value before comparing (in milliseconds) | |
239 | * | |
62fe710f | 240 | * Return: true if current time is after timestamp + timeout |
a04ccd59 | 241 | */ |
1eda58bf SE |
242 | static inline bool batadv_has_timed_out(unsigned long timestamp, |
243 | unsigned int timeout) | |
a04ccd59 MH |
244 | { |
245 | return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout)); | |
246 | } | |
747e4221 | 247 | |
3e34819e | 248 | #define batadv_atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) |
5f657ec0 | 249 | |
f5d33d37 | 250 | /* Returns the smallest signed integer in two's complement with the sizeof x */ |
3e34819e | 251 | #define batadv_smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u))) |
f5d33d37 AQ |
252 | |
253 | /* Checks if a sequence number x is a predecessor/successor of y. | |
254 | * they handle overflows/underflows and can correctly check for a | |
255 | * predecessor/successor unless the variable sequence number has grown by | |
256 | * more then 2**(bitwidth(x)-1)-1. | |
6b5e971a | 257 | * This means that for a u8 with the maximum value 255, it would think: |
f5d33d37 AQ |
258 | * - when adding nothing - it is neither a predecessor nor a successor |
259 | * - before adding more than 127 to the starting value - it is a predecessor, | |
260 | * - when adding 128 - it is neither a predecessor nor a successor, | |
9cfc7bd6 SE |
261 | * - after adding more than 127 to the starting value - it is a successor |
262 | */ | |
9687a31c AQ |
263 | #define batadv_seq_before(x, y) ({typeof(x)_d1 = (x); \ |
264 | typeof(y)_d2 = (y); \ | |
265 | typeof(x)_dummy = (_d1 - _d2); \ | |
266 | (void)(&_d1 == &_d2); \ | |
3e34819e SE |
267 | _dummy > batadv_smallest_signed_int(_dummy); }) |
268 | #define batadv_seq_after(x, y) batadv_seq_before(y, x) | |
f5d33d37 | 269 | |
f8214865 | 270 | /* Stop preemption on local cpu while incrementing the counter */ |
56303d34 | 271 | static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx, |
f8214865 MH |
272 | size_t count) |
273 | { | |
56917443 | 274 | this_cpu_add(bat_priv->bat_counters[idx], count); |
f8214865 MH |
275 | } |
276 | ||
277 | #define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1) | |
278 | ||
62fe710f SE |
279 | /** |
280 | * batadv_sum_counter - Sum the cpu-local counters for index 'idx' | |
7afcbbef SE |
281 | * @bat_priv: the bat priv with all the soft interface information |
282 | * @idx: index of counter to sum up | |
62fe710f SE |
283 | * |
284 | * Return: sum of all cpu-local counters | |
285 | */ | |
6b5e971a | 286 | static inline u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx) |
f8214865 | 287 | { |
6b5e971a | 288 | u64 *counters, sum = 0; |
f8214865 | 289 | int cpu; |
f8214865 MH |
290 | |
291 | for_each_possible_cpu(cpu) { | |
292 | counters = per_cpu_ptr(bat_priv->bat_counters, cpu); | |
293 | sum += counters[idx]; | |
294 | } | |
295 | ||
296 | return sum; | |
297 | } | |
298 | ||
3c12de9a MH |
299 | /* Define a macro to reach the control buffer of the skb. The members of the |
300 | * control buffer are defined in struct batadv_skb_cb in types.h. | |
301 | * The macro is inspired by the similar macro TCP_SKB_CB() in tcp.h. | |
302 | */ | |
303 | #define BATADV_SKB_CB(__skb) ((struct batadv_skb_cb *)&((__skb)->cb[0])) | |
304 | ||
c018ad3d | 305 | unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len); |
eceb22ae | 306 | bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid); |
ef261577 | 307 | |
c6c8fea2 | 308 | #endif /* _NET_BATMAN_ADV_MAIN_H_ */ |