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Commit 095de01325962e7574d5793193c6f3ae9a175aab

Authored by Rui Paulo
Committed by John W. Linville
1 parent 0938393f02
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

mac80211: update the format of path selection frames 

Update the format of path selection frames according to latest
draft (3.03).

Signed-off-by: Rui Paulo <rpaulo@gmail.com>
Signed-off-by: Javier Cardona <javier@cozybit.com>
Reviewed-by: Andrey Yurovsky <andrey@cozybit.com>
Tested-by: Brian Cavagnolo <brian@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Showing 2 changed files with 2 additions and 1 deletions Inline Diff

1 /* 1 /*
2 * Copyright (c) 2008 open80211s Ltd. 2 * Copyright (c) 2008 open80211s Ltd.
3 * Authors: Luis Carlos Cobo <luisca@cozybit.com> 3 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
4 * Javier Cardona <javier@cozybit.com> 4 * Javier Cardona <javier@cozybit.com>
5 * 5 *
6 * This program is free software; you can redistribute it and/or modify 6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as 7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation. 8 * published by the Free Software Foundation.
9 */ 9 */
10 10
11 #ifndef IEEE80211S_H 11 #ifndef IEEE80211S_H
12 #define IEEE80211S_H 12 #define IEEE80211S_H
13 13
14 #include <linux/types.h> 14 #include <linux/types.h>
15 #include <linux/jhash.h> 15 #include <linux/jhash.h>
16 #include <asm/unaligned.h> 16 #include <asm/unaligned.h>
17 #include "ieee80211_i.h" 17 #include "ieee80211_i.h"
18 18
19 19
20 /* Data structures */ 20 /* Data structures */
21 21
22 /** 22 /**
23 * enum mesh_path_flags - mac80211 mesh path flags 23 * enum mesh_path_flags - mac80211 mesh path flags
24 * 24 *
25 * 25 *
26 * 26 *
27 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding 27 * @MESH_PATH_ACTIVE: the mesh path can be used for forwarding
28 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path 28 * @MESH_PATH_RESOLVING: the discovery process is running for this mesh path
29 * @MESH_PATH_DSN_VALID: the mesh path contains a valid destination sequence 29 * @MESH_PATH_DSN_VALID: the mesh path contains a valid destination sequence
30 * number 30 * number
31 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be 31 * @MESH_PATH_FIXED: the mesh path has been manually set and should not be
32 * modified 32 * modified
33 * @MESH_PATH_RESOLVED: the mesh path can has been resolved 33 * @MESH_PATH_RESOLVED: the mesh path can has been resolved
34 * 34 *
35 * MESH_PATH_RESOLVED is used by the mesh path timer to 35 * MESH_PATH_RESOLVED is used by the mesh path timer to
36 * decide when to stop or cancel the mesh path discovery. 36 * decide when to stop or cancel the mesh path discovery.
37 */ 37 */
38 enum mesh_path_flags { 38 enum mesh_path_flags {
39 MESH_PATH_ACTIVE = BIT(0), 39 MESH_PATH_ACTIVE = BIT(0),
40 MESH_PATH_RESOLVING = BIT(1), 40 MESH_PATH_RESOLVING = BIT(1),
41 MESH_PATH_DSN_VALID = BIT(2), 41 MESH_PATH_DSN_VALID = BIT(2),
42 MESH_PATH_FIXED = BIT(3), 42 MESH_PATH_FIXED = BIT(3),
43 MESH_PATH_RESOLVED = BIT(4), 43 MESH_PATH_RESOLVED = BIT(4),
44 }; 44 };
45 45
46 /** 46 /**
47 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks 47 * enum mesh_deferred_task_flags - mac80211 mesh deferred tasks
48 * 48 *
49 * 49 *
50 * 50 *
51 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks 51 * @MESH_WORK_HOUSEKEEPING: run the periodic mesh housekeeping tasks
52 * @MESH_WORK_GROW_MPATH_TABLE: the mesh path table is full and needs 52 * @MESH_WORK_GROW_MPATH_TABLE: the mesh path table is full and needs
53 * to grow. 53 * to grow.
54 * @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to 54 * @MESH_WORK_GROW_MPP_TABLE: the mesh portals table is full and needs to
55 * grow 55 * grow
56 */ 56 */
57 enum mesh_deferred_task_flags { 57 enum mesh_deferred_task_flags {
58 MESH_WORK_HOUSEKEEPING, 58 MESH_WORK_HOUSEKEEPING,
59 MESH_WORK_GROW_MPATH_TABLE, 59 MESH_WORK_GROW_MPATH_TABLE,
60 MESH_WORK_GROW_MPP_TABLE, 60 MESH_WORK_GROW_MPP_TABLE,
61 }; 61 };
62 62
63 /** 63 /**
64 * struct mesh_path - mac80211 mesh path structure 64 * struct mesh_path - mac80211 mesh path structure
65 * 65 *
66 * @dst: mesh path destination mac address 66 * @dst: mesh path destination mac address
67 * @sdata: mesh subif 67 * @sdata: mesh subif
68 * @next_hop: mesh neighbor to which frames for this destination will be 68 * @next_hop: mesh neighbor to which frames for this destination will be
69 * forwarded 69 * forwarded
70 * @timer: mesh path discovery timer 70 * @timer: mesh path discovery timer
71 * @frame_queue: pending queue for frames sent to this destination while the 71 * @frame_queue: pending queue for frames sent to this destination while the
72 * path is unresolved 72 * path is unresolved
73 * @dsn: destination sequence number of the destination 73 * @dsn: destination sequence number of the destination
74 * @metric: current metric to this destination 74 * @metric: current metric to this destination
75 * @hop_count: hops to destination 75 * @hop_count: hops to destination
76 * @exp_time: in jiffies, when the path will expire or when it expired 76 * @exp_time: in jiffies, when the path will expire or when it expired
77 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery 77 * @discovery_timeout: timeout (lapse in jiffies) used for the last discovery
78 * retry 78 * retry
79 * @discovery_retries: number of discovery retries 79 * @discovery_retries: number of discovery retries
80 * @flags: mesh path flags, as specified on &enum mesh_path_flags 80 * @flags: mesh path flags, as specified on &enum mesh_path_flags
81 * @state_lock: mesh path state lock 81 * @state_lock: mesh path state lock
82 * 82 *
83 * 83 *
84 * The combination of dst and sdata is unique in the mesh path table. Since the 84 * The combination of dst and sdata is unique in the mesh path table. Since the
85 * next_hop STA is only protected by RCU as well, deleting the STA must also 85 * next_hop STA is only protected by RCU as well, deleting the STA must also
86 * remove/substitute the mesh_path structure and wait until that is no longer 86 * remove/substitute the mesh_path structure and wait until that is no longer
87 * reachable before destroying the STA completely. 87 * reachable before destroying the STA completely.
88 */ 88 */
89 struct mesh_path { 89 struct mesh_path {
90 u8 dst[ETH_ALEN]; 90 u8 dst[ETH_ALEN];
91 u8 mpp[ETH_ALEN]; /* used for MPP or MAP */ 91 u8 mpp[ETH_ALEN]; /* used for MPP or MAP */
92 struct ieee80211_sub_if_data *sdata; 92 struct ieee80211_sub_if_data *sdata;
93 struct sta_info *next_hop; 93 struct sta_info *next_hop;
94 struct timer_list timer; 94 struct timer_list timer;
95 struct sk_buff_head frame_queue; 95 struct sk_buff_head frame_queue;
96 struct rcu_head rcu; 96 struct rcu_head rcu;
97 u32 dsn; 97 u32 dsn;
98 u32 metric; 98 u32 metric;
99 u8 hop_count; 99 u8 hop_count;
100 unsigned long exp_time; 100 unsigned long exp_time;
101 u32 discovery_timeout; 101 u32 discovery_timeout;
102 u8 discovery_retries; 102 u8 discovery_retries;
103 enum mesh_path_flags flags; 103 enum mesh_path_flags flags;
104 spinlock_t state_lock; 104 spinlock_t state_lock;
105 }; 105 };
106 106
107 /** 107 /**
108 * struct mesh_table 108 * struct mesh_table
109 * 109 *
110 * @hash_buckets: array of hash buckets of the table 110 * @hash_buckets: array of hash buckets of the table
111 * @hashwlock: array of locks to protect write operations, one per bucket 111 * @hashwlock: array of locks to protect write operations, one per bucket
112 * @hash_mask: 2^size_order - 1, used to compute hash idx 112 * @hash_mask: 2^size_order - 1, used to compute hash idx
113 * @hash_rnd: random value used for hash computations 113 * @hash_rnd: random value used for hash computations
114 * @entries: number of entries in the table 114 * @entries: number of entries in the table
115 * @free_node: function to free nodes of the table 115 * @free_node: function to free nodes of the table
116 * @copy_node: fuction to copy nodes of the table 116 * @copy_node: fuction to copy nodes of the table
117 * @size_order: determines size of the table, there will be 2^size_order hash 117 * @size_order: determines size of the table, there will be 2^size_order hash
118 * buckets 118 * buckets
119 * @mean_chain_len: maximum average length for the hash buckets' list, if it is 119 * @mean_chain_len: maximum average length for the hash buckets' list, if it is
120 * reached, the table will grow 120 * reached, the table will grow
121 */ 121 */
122 struct mesh_table { 122 struct mesh_table {
123 /* Number of buckets will be 2^N */ 123 /* Number of buckets will be 2^N */
124 struct hlist_head *hash_buckets; 124 struct hlist_head *hash_buckets;
125 spinlock_t *hashwlock; /* One per bucket, for add/del */ 125 spinlock_t *hashwlock; /* One per bucket, for add/del */
126 unsigned int hash_mask; /* (2^size_order) - 1 */ 126 unsigned int hash_mask; /* (2^size_order) - 1 */
127 __u32 hash_rnd; /* Used for hash generation */ 127 __u32 hash_rnd; /* Used for hash generation */
128 atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */ 128 atomic_t entries; /* Up to MAX_MESH_NEIGHBOURS */
129 void (*free_node) (struct hlist_node *p, bool free_leafs); 129 void (*free_node) (struct hlist_node *p, bool free_leafs);
130 int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl); 130 int (*copy_node) (struct hlist_node *p, struct mesh_table *newtbl);
131 int size_order; 131 int size_order;
132 int mean_chain_len; 132 int mean_chain_len;
133 }; 133 };
134 134
135 /* Recent multicast cache */ 135 /* Recent multicast cache */
136 /* RMC_BUCKETS must be a power of 2, maximum 256 */ 136 /* RMC_BUCKETS must be a power of 2, maximum 256 */
137 #define RMC_BUCKETS 256 137 #define RMC_BUCKETS 256
138 #define RMC_QUEUE_MAX_LEN 4 138 #define RMC_QUEUE_MAX_LEN 4
139 #define RMC_TIMEOUT (3 * HZ) 139 #define RMC_TIMEOUT (3 * HZ)
140 140
141 /** 141 /**
142 * struct rmc_entry - entry in the Recent Multicast Cache 142 * struct rmc_entry - entry in the Recent Multicast Cache
143 * 143 *
144 * @seqnum: mesh sequence number of the frame 144 * @seqnum: mesh sequence number of the frame
145 * @exp_time: expiration time of the entry, in jiffies 145 * @exp_time: expiration time of the entry, in jiffies
146 * @sa: source address of the frame 146 * @sa: source address of the frame
147 * 147 *
148 * The Recent Multicast Cache keeps track of the latest multicast frames that 148 * The Recent Multicast Cache keeps track of the latest multicast frames that
149 * have been received by a mesh interface and discards received multicast frames 149 * have been received by a mesh interface and discards received multicast frames
150 * that are found in the cache. 150 * that are found in the cache.
151 */ 151 */
152 struct rmc_entry { 152 struct rmc_entry {
153 struct list_head list; 153 struct list_head list;
154 u32 seqnum; 154 u32 seqnum;
155 unsigned long exp_time; 155 unsigned long exp_time;
156 u8 sa[ETH_ALEN]; 156 u8 sa[ETH_ALEN];
157 }; 157 };
158 158
159 struct mesh_rmc { 159 struct mesh_rmc {
160 struct rmc_entry bucket[RMC_BUCKETS]; 160 struct rmc_entry bucket[RMC_BUCKETS];
161 u32 idx_mask; 161 u32 idx_mask;
162 }; 162 };
163 163
164 164
165 /* 165 /*
166 * MESH_CFG_COMP_LEN Includes: 166 * MESH_CFG_COMP_LEN Includes:
167 * - Active path selection protocol ID. 167 * - Active path selection protocol ID.
168 * - Active path selection metric ID. 168 * - Active path selection metric ID.
169 * - Congestion control mode identifier. 169 * - Congestion control mode identifier.
170 * - Channel precedence. 170 * - Channel precedence.
171 * Does not include mesh capabilities, which may vary across nodes in the same 171 * Does not include mesh capabilities, which may vary across nodes in the same
172 * mesh 172 * mesh
173 */ 173 */
174 #define MESH_CFG_CMP_LEN (IEEE80211_MESH_CONFIG_LEN - 2) 174 #define MESH_CFG_CMP_LEN (IEEE80211_MESH_CONFIG_LEN - 2)
175 175
176 /* Default values, timeouts in ms */ 176 /* Default values, timeouts in ms */
177 #define MESH_TTL 31 177 #define MESH_TTL 31
178 #define MESH_MAX_RETR 3 178 #define MESH_MAX_RETR 3
179 #define MESH_RET_T 100 179 #define MESH_RET_T 100
180 #define MESH_CONF_T 100 180 #define MESH_CONF_T 100
181 #define MESH_HOLD_T 100 181 #define MESH_HOLD_T 100
182 182
183 #define MESH_PATH_TIMEOUT 5000 183 #define MESH_PATH_TIMEOUT 5000
184 /* Minimum interval between two consecutive PREQs originated by the same 184 /* Minimum interval between two consecutive PREQs originated by the same
185 * interface 185 * interface
186 */ 186 */
187 #define MESH_PREQ_MIN_INT 10 187 #define MESH_PREQ_MIN_INT 10
188 #define MESH_DIAM_TRAVERSAL_TIME 50 188 #define MESH_DIAM_TRAVERSAL_TIME 50
189 /* Paths will be refreshed if they are closer than PATH_REFRESH_TIME to their 189 /* Paths will be refreshed if they are closer than PATH_REFRESH_TIME to their
190 * expiration 190 * expiration
191 */ 191 */
192 #define MESH_PATH_REFRESH_TIME 1000 192 #define MESH_PATH_REFRESH_TIME 1000
193 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME) 193 #define MESH_MIN_DISCOVERY_TIMEOUT (2 * MESH_DIAM_TRAVERSAL_TIME)
194 #define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units */ 194 #define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units */
195 195
196 #define MESH_MAX_PREQ_RETRIES 4 196 #define MESH_MAX_PREQ_RETRIES 4
197 #define MESH_PATH_EXPIRE (600 * HZ) 197 #define MESH_PATH_EXPIRE (600 * HZ)
198 198
199 /* Default maximum number of established plinks per interface */ 199 /* Default maximum number of established plinks per interface */
200 #define MESH_MAX_ESTAB_PLINKS 32 200 #define MESH_MAX_ESTAB_PLINKS 32
201 201
202 /* Default maximum number of plinks per interface */ 202 /* Default maximum number of plinks per interface */
203 #define MESH_MAX_PLINKS 256 203 #define MESH_MAX_PLINKS 256
204 204
205 /* Maximum number of paths per interface */ 205 /* Maximum number of paths per interface */
206 #define MESH_MAX_MPATHS 1024 206 #define MESH_MAX_MPATHS 1024
207 207
208 /* Pending ANA approval */ 208 /* Pending ANA approval */
209 #define MESH_PLINK_CATEGORY 30 209 #define MESH_PLINK_CATEGORY 30
210 #define MESH_PATH_SEL_CATEGORY 32 210 #define MESH_PATH_SEL_CATEGORY 32
211 #define MESH_PATH_SEL_ACTION 0
211 212
212 /* Public interfaces */ 213 /* Public interfaces */
213 /* Various */ 214 /* Various */
214 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 215 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
215 char *da, char *sa); 216 char *da, char *sa);
216 int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, 217 int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
217 struct ieee80211_sub_if_data *sdata, char *addr4, 218 struct ieee80211_sub_if_data *sdata, char *addr4,
218 char *addr5, char *addr6); 219 char *addr5, char *addr6);
219 int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr, 220 int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr,
220 struct ieee80211_sub_if_data *sdata); 221 struct ieee80211_sub_if_data *sdata);
221 bool mesh_matches_local(struct ieee802_11_elems *ie, 222 bool mesh_matches_local(struct ieee802_11_elems *ie,
222 struct ieee80211_sub_if_data *sdata); 223 struct ieee80211_sub_if_data *sdata);
223 void mesh_ids_set_default(struct ieee80211_if_mesh *mesh); 224 void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
224 void mesh_mgmt_ies_add(struct sk_buff *skb, 225 void mesh_mgmt_ies_add(struct sk_buff *skb,
225 struct ieee80211_sub_if_data *sdata); 226 struct ieee80211_sub_if_data *sdata);
226 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata); 227 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
227 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata); 228 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
228 void ieee80211s_init(void); 229 void ieee80211s_init(void);
229 void ieee80211s_update_metric(struct ieee80211_local *local, 230 void ieee80211s_update_metric(struct ieee80211_local *local,
230 struct sta_info *stainfo, struct sk_buff *skb); 231 struct sta_info *stainfo, struct sk_buff *skb);
231 void ieee80211s_stop(void); 232 void ieee80211s_stop(void);
232 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata); 233 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
233 ieee80211_rx_result 234 ieee80211_rx_result
234 ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); 235 ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
235 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata); 236 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
236 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata); 237 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata);
237 238
238 /* Mesh paths */ 239 /* Mesh paths */
239 int mesh_nexthop_lookup(struct sk_buff *skb, 240 int mesh_nexthop_lookup(struct sk_buff *skb,
240 struct ieee80211_sub_if_data *sdata); 241 struct ieee80211_sub_if_data *sdata);
241 void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata); 242 void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata);
242 struct mesh_path *mesh_path_lookup(u8 *dst, 243 struct mesh_path *mesh_path_lookup(u8 *dst,
243 struct ieee80211_sub_if_data *sdata); 244 struct ieee80211_sub_if_data *sdata);
244 struct mesh_path *mpp_path_lookup(u8 *dst, 245 struct mesh_path *mpp_path_lookup(u8 *dst,
245 struct ieee80211_sub_if_data *sdata); 246 struct ieee80211_sub_if_data *sdata);
246 int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata); 247 int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata);
247 struct mesh_path *mesh_path_lookup_by_idx(int idx, 248 struct mesh_path *mesh_path_lookup_by_idx(int idx,
248 struct ieee80211_sub_if_data *sdata); 249 struct ieee80211_sub_if_data *sdata);
249 void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop); 250 void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop);
250 void mesh_path_expire(struct ieee80211_sub_if_data *sdata); 251 void mesh_path_expire(struct ieee80211_sub_if_data *sdata);
251 void mesh_path_flush(struct ieee80211_sub_if_data *sdata); 252 void mesh_path_flush(struct ieee80211_sub_if_data *sdata);
252 void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata, 253 void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
253 struct ieee80211_mgmt *mgmt, size_t len); 254 struct ieee80211_mgmt *mgmt, size_t len);
254 int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata); 255 int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata);
255 /* Mesh plinks */ 256 /* Mesh plinks */
256 void mesh_neighbour_update(u8 *hw_addr, u32 rates, 257 void mesh_neighbour_update(u8 *hw_addr, u32 rates,
257 struct ieee80211_sub_if_data *sdata, bool add); 258 struct ieee80211_sub_if_data *sdata, bool add);
258 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie); 259 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
259 void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata); 260 void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
260 void mesh_plink_broken(struct sta_info *sta); 261 void mesh_plink_broken(struct sta_info *sta);
261 void mesh_plink_deactivate(struct sta_info *sta); 262 void mesh_plink_deactivate(struct sta_info *sta);
262 int mesh_plink_open(struct sta_info *sta); 263 int mesh_plink_open(struct sta_info *sta);
263 void mesh_plink_block(struct sta_info *sta); 264 void mesh_plink_block(struct sta_info *sta);
264 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, 265 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
265 struct ieee80211_mgmt *mgmt, size_t len, 266 struct ieee80211_mgmt *mgmt, size_t len,
266 struct ieee80211_rx_status *rx_status); 267 struct ieee80211_rx_status *rx_status);
267 268
268 /* Private interfaces */ 269 /* Private interfaces */
269 /* Mesh tables */ 270 /* Mesh tables */
270 struct mesh_table *mesh_table_alloc(int size_order); 271 struct mesh_table *mesh_table_alloc(int size_order);
271 void mesh_table_free(struct mesh_table *tbl, bool free_leafs); 272 void mesh_table_free(struct mesh_table *tbl, bool free_leafs);
272 void mesh_mpath_table_grow(void); 273 void mesh_mpath_table_grow(void);
273 void mesh_mpp_table_grow(void); 274 void mesh_mpp_table_grow(void);
274 u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, 275 u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata,
275 struct mesh_table *tbl); 276 struct mesh_table *tbl);
276 /* Mesh paths */ 277 /* Mesh paths */
277 int mesh_path_error_tx(u8 *dest, __le32 dest_dsn, u8 *ra, 278 int mesh_path_error_tx(u8 *dest, __le32 dest_dsn, u8 *ra,
278 struct ieee80211_sub_if_data *sdata); 279 struct ieee80211_sub_if_data *sdata);
279 void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta); 280 void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta);
280 void mesh_path_flush_pending(struct mesh_path *mpath); 281 void mesh_path_flush_pending(struct mesh_path *mpath);
281 void mesh_path_tx_pending(struct mesh_path *mpath); 282 void mesh_path_tx_pending(struct mesh_path *mpath);
282 int mesh_pathtbl_init(void); 283 int mesh_pathtbl_init(void);
283 void mesh_pathtbl_unregister(void); 284 void mesh_pathtbl_unregister(void);
284 int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata); 285 int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata);
285 void mesh_path_timer(unsigned long data); 286 void mesh_path_timer(unsigned long data);
286 void mesh_path_flush_by_nexthop(struct sta_info *sta); 287 void mesh_path_flush_by_nexthop(struct sta_info *sta);
287 void mesh_path_discard_frame(struct sk_buff *skb, 288 void mesh_path_discard_frame(struct sk_buff *skb,
288 struct ieee80211_sub_if_data *sdata); 289 struct ieee80211_sub_if_data *sdata);
289 void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata); 290 void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
290 void mesh_path_restart(struct ieee80211_sub_if_data *sdata); 291 void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
291 292
292 extern int mesh_paths_generation; 293 extern int mesh_paths_generation;
293 294
294 #ifdef CONFIG_MAC80211_MESH 295 #ifdef CONFIG_MAC80211_MESH
295 extern int mesh_allocated; 296 extern int mesh_allocated;
296 297
297 static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata) 298 static inline int mesh_plink_free_count(struct ieee80211_sub_if_data *sdata)
298 { 299 {
299 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks - 300 return sdata->u.mesh.mshcfg.dot11MeshMaxPeerLinks -
300 atomic_read(&sdata->u.mesh.mshstats.estab_plinks); 301 atomic_read(&sdata->u.mesh.mshstats.estab_plinks);
301 } 302 }
302 303
303 static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata) 304 static inline bool mesh_plink_availables(struct ieee80211_sub_if_data *sdata)
304 { 305 {
305 return (min_t(long, mesh_plink_free_count(sdata), 306 return (min_t(long, mesh_plink_free_count(sdata),
306 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0; 307 MESH_MAX_PLINKS - sdata->local->num_sta)) > 0;
307 } 308 }
308 309
309 static inline void mesh_path_activate(struct mesh_path *mpath) 310 static inline void mesh_path_activate(struct mesh_path *mpath)
310 { 311 {
311 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED; 312 mpath->flags |= MESH_PATH_ACTIVE | MESH_PATH_RESOLVED;
312 } 313 }
313 314
314 #define for_each_mesh_entry(x, p, node, i) \ 315 #define for_each_mesh_entry(x, p, node, i) \
315 for (i = 0; i <= x->hash_mask; i++) \ 316 for (i = 0; i <= x->hash_mask; i++) \
316 hlist_for_each_entry_rcu(node, p, &x->hash_buckets[i], list) 317 hlist_for_each_entry_rcu(node, p, &x->hash_buckets[i], list)
317 318
318 void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local); 319 void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
319 320
320 void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata); 321 void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
321 void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata); 322 void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
322 void mesh_plink_quiesce(struct sta_info *sta); 323 void mesh_plink_quiesce(struct sta_info *sta);
323 void mesh_plink_restart(struct sta_info *sta); 324 void mesh_plink_restart(struct sta_info *sta);
324 #else 325 #else
325 #define mesh_allocated 0 326 #define mesh_allocated 0
326 static inline void 327 static inline void
327 ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {} 328 ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
328 static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) 329 static inline void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata)
329 {} 330 {}
330 static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) 331 static inline void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata)
331 {} 332 {}
332 static inline void mesh_plink_quiesce(struct sta_info *sta) {} 333 static inline void mesh_plink_quiesce(struct sta_info *sta) {}
333 static inline void mesh_plink_restart(struct sta_info *sta) {} 334 static inline void mesh_plink_restart(struct sta_info *sta) {}
334 #endif 335 #endif
335 336
336 #endif /* IEEE80211S_H */ 337 #endif /* IEEE80211S_H */
337 338
net/mac80211/mesh_hwmp.c
Diff comments   View file @ 095de01
1 /* 1 /*
2 * Copyright (c) 2008 open80211s Ltd. 2 * Copyright (c) 2008 open80211s Ltd.
3 * Author: Luis Carlos Cobo <luisca@cozybit.com> 3 * Author: Luis Carlos Cobo <luisca@cozybit.com>
4 * 4 *
5 * This program is free software; you can redistribute it and/or modify 5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as 6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
8 */ 8 */
9 9
10 #include "mesh.h" 10 #include "mesh.h"
11 11
12 #define TEST_FRAME_LEN 8192 12 #define TEST_FRAME_LEN 8192
13 #define MAX_METRIC 0xffffffff 13 #define MAX_METRIC 0xffffffff
14 #define ARITH_SHIFT 8 14 #define ARITH_SHIFT 8
15 15
16 /* Number of frames buffered per destination for unresolved destinations */ 16 /* Number of frames buffered per destination for unresolved destinations */
17 #define MESH_FRAME_QUEUE_LEN 10 17 #define MESH_FRAME_QUEUE_LEN 10
18 #define MAX_PREQ_QUEUE_LEN 64 18 #define MAX_PREQ_QUEUE_LEN 64
19 19
20 /* Destination only */ 20 /* Destination only */
21 #define MP_F_DO 0x1 21 #define MP_F_DO 0x1
22 /* Reply and forward */ 22 /* Reply and forward */
23 #define MP_F_RF 0x2 23 #define MP_F_RF 0x2
24 24
25 static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae) 25 static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
26 { 26 {
27 if (ae) 27 if (ae)
28 offset += 6; 28 offset += 6;
29 return get_unaligned_le32(preq_elem + offset); 29 return get_unaligned_le32(preq_elem + offset);
30 } 30 }
31 31
32 /* HWMP IE processing macros */ 32 /* HWMP IE processing macros */
33 #define AE_F (1<<6) 33 #define AE_F (1<<6)
34 #define AE_F_SET(x) (*x & AE_F) 34 #define AE_F_SET(x) (*x & AE_F)
35 #define PREQ_IE_FLAGS(x) (*(x)) 35 #define PREQ_IE_FLAGS(x) (*(x))
36 #define PREQ_IE_HOPCOUNT(x) (*(x + 1)) 36 #define PREQ_IE_HOPCOUNT(x) (*(x + 1))
37 #define PREQ_IE_TTL(x) (*(x + 2)) 37 #define PREQ_IE_TTL(x) (*(x + 2))
38 #define PREQ_IE_PREQ_ID(x) u32_field_get(x, 3, 0) 38 #define PREQ_IE_PREQ_ID(x) u32_field_get(x, 3, 0)
39 #define PREQ_IE_ORIG_ADDR(x) (x + 7) 39 #define PREQ_IE_ORIG_ADDR(x) (x + 7)
40 #define PREQ_IE_ORIG_DSN(x) u32_field_get(x, 13, 0); 40 #define PREQ_IE_ORIG_DSN(x) u32_field_get(x, 13, 0);
41 #define PREQ_IE_LIFETIME(x) u32_field_get(x, 17, AE_F_SET(x)); 41 #define PREQ_IE_LIFETIME(x) u32_field_get(x, 17, AE_F_SET(x));
42 #define PREQ_IE_METRIC(x) u32_field_get(x, 21, AE_F_SET(x)); 42 #define PREQ_IE_METRIC(x) u32_field_get(x, 21, AE_F_SET(x));
43 #define PREQ_IE_DST_F(x) (*(AE_F_SET(x) ? x + 32 : x + 26)) 43 #define PREQ_IE_DST_F(x) (*(AE_F_SET(x) ? x + 32 : x + 26))
44 #define PREQ_IE_DST_ADDR(x) (AE_F_SET(x) ? x + 33 : x + 27) 44 #define PREQ_IE_DST_ADDR(x) (AE_F_SET(x) ? x + 33 : x + 27)
45 #define PREQ_IE_DST_DSN(x) u32_field_get(x, 33, AE_F_SET(x)); 45 #define PREQ_IE_DST_DSN(x) u32_field_get(x, 33, AE_F_SET(x));
46 46
47 47
48 #define PREP_IE_FLAGS(x) PREQ_IE_FLAGS(x) 48 #define PREP_IE_FLAGS(x) PREQ_IE_FLAGS(x)
49 #define PREP_IE_HOPCOUNT(x) PREQ_IE_HOPCOUNT(x) 49 #define PREP_IE_HOPCOUNT(x) PREQ_IE_HOPCOUNT(x)
50 #define PREP_IE_TTL(x) PREQ_IE_TTL(x) 50 #define PREP_IE_TTL(x) PREQ_IE_TTL(x)
51 #define PREP_IE_ORIG_ADDR(x) (x + 3) 51 #define PREP_IE_ORIG_ADDR(x) (x + 3)
52 #define PREP_IE_ORIG_DSN(x) u32_field_get(x, 9, 0); 52 #define PREP_IE_ORIG_DSN(x) u32_field_get(x, 9, 0);
53 #define PREP_IE_LIFETIME(x) u32_field_get(x, 13, AE_F_SET(x)); 53 #define PREP_IE_LIFETIME(x) u32_field_get(x, 13, AE_F_SET(x));
54 #define PREP_IE_METRIC(x) u32_field_get(x, 17, AE_F_SET(x)); 54 #define PREP_IE_METRIC(x) u32_field_get(x, 17, AE_F_SET(x));
55 #define PREP_IE_DST_ADDR(x) (AE_F_SET(x) ? x + 27 : x + 21) 55 #define PREP_IE_DST_ADDR(x) (AE_F_SET(x) ? x + 27 : x + 21)
56 #define PREP_IE_DST_DSN(x) u32_field_get(x, 27, AE_F_SET(x)); 56 #define PREP_IE_DST_DSN(x) u32_field_get(x, 27, AE_F_SET(x));
57 57
58 #define PERR_IE_DST_ADDR(x) (x + 2) 58 #define PERR_IE_DST_ADDR(x) (x + 2)
59 #define PERR_IE_DST_DSN(x) u32_field_get(x, 8, 0); 59 #define PERR_IE_DST_DSN(x) u32_field_get(x, 8, 0);
60 60
61 #define MSEC_TO_TU(x) (x*1000/1024) 61 #define MSEC_TO_TU(x) (x*1000/1024)
62 #define DSN_GT(x, y) ((long) (y) - (long) (x) < 0) 62 #define DSN_GT(x, y) ((long) (y) - (long) (x) < 0)
63 #define DSN_LT(x, y) ((long) (x) - (long) (y) < 0) 63 #define DSN_LT(x, y) ((long) (x) - (long) (y) < 0)
64 64
65 #define net_traversal_jiffies(s) \ 65 #define net_traversal_jiffies(s) \
66 msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime) 66 msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime)
67 #define default_lifetime(s) \ 67 #define default_lifetime(s) \
68 MSEC_TO_TU(s->u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout) 68 MSEC_TO_TU(s->u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout)
69 #define min_preq_int_jiff(s) \ 69 #define min_preq_int_jiff(s) \
70 (msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval)) 70 (msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval))
71 #define max_preq_retries(s) (s->u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries) 71 #define max_preq_retries(s) (s->u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries)
72 #define disc_timeout_jiff(s) \ 72 #define disc_timeout_jiff(s) \
73 msecs_to_jiffies(sdata->u.mesh.mshcfg.min_discovery_timeout) 73 msecs_to_jiffies(sdata->u.mesh.mshcfg.min_discovery_timeout)
74 74
75 enum mpath_frame_type { 75 enum mpath_frame_type {
76 MPATH_PREQ = 0, 76 MPATH_PREQ = 0,
77 MPATH_PREP, 77 MPATH_PREP,
78 MPATH_PERR 78 MPATH_PERR
79 }; 79 };
80 80
81 static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags, 81 static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
82 u8 *orig_addr, __le32 orig_dsn, u8 dst_flags, u8 *dst, 82 u8 *orig_addr, __le32 orig_dsn, u8 dst_flags, u8 *dst,
83 __le32 dst_dsn, u8 *da, u8 hop_count, u8 ttl, __le32 lifetime, 83 __le32 dst_dsn, u8 *da, u8 hop_count, u8 ttl, __le32 lifetime,
84 __le32 metric, __le32 preq_id, struct ieee80211_sub_if_data *sdata) 84 __le32 metric, __le32 preq_id, struct ieee80211_sub_if_data *sdata)
85 { 85 {
86 struct ieee80211_local *local = sdata->local; 86 struct ieee80211_local *local = sdata->local;
87 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); 87 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
88 struct ieee80211_mgmt *mgmt; 88 struct ieee80211_mgmt *mgmt;
89 u8 *pos; 89 u8 *pos;
90 int ie_len; 90 int ie_len;
91 91
92 if (!skb) 92 if (!skb)
93 return -1; 93 return -1;
94 skb_reserve(skb, local->hw.extra_tx_headroom); 94 skb_reserve(skb, local->hw.extra_tx_headroom);
95 /* 25 is the size of the common mgmt part (24) plus the size of the 95 /* 25 is the size of the common mgmt part (24) plus the size of the
96 * common action part (1) 96 * common action part (1)
97 */ 97 */
98 mgmt = (struct ieee80211_mgmt *) 98 mgmt = (struct ieee80211_mgmt *)
99 skb_put(skb, 25 + sizeof(mgmt->u.action.u.mesh_action)); 99 skb_put(skb, 25 + sizeof(mgmt->u.action.u.mesh_action));
100 memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.mesh_action)); 100 memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.mesh_action));
101 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 101 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
102 IEEE80211_STYPE_ACTION); 102 IEEE80211_STYPE_ACTION);
103 103
104 memcpy(mgmt->da, da, ETH_ALEN); 104 memcpy(mgmt->da, da, ETH_ALEN);
105 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); 105 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
106 /* BSSID is left zeroed, wildcard value */ 106 /* BSSID is left zeroed, wildcard value */
107 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY; 107 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
108 mgmt->u.action.u.mesh_action.action_code = action; 108 mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
109 109
110 switch (action) { 110 switch (action) {
111 case MPATH_PREQ: 111 case MPATH_PREQ:
112 ie_len = 37; 112 ie_len = 37;
113 pos = skb_put(skb, 2 + ie_len); 113 pos = skb_put(skb, 2 + ie_len);
114 *pos++ = WLAN_EID_PREQ; 114 *pos++ = WLAN_EID_PREQ;
115 break; 115 break;
116 case MPATH_PREP: 116 case MPATH_PREP:
117 ie_len = 31; 117 ie_len = 31;
118 pos = skb_put(skb, 2 + ie_len); 118 pos = skb_put(skb, 2 + ie_len);
119 *pos++ = WLAN_EID_PREP; 119 *pos++ = WLAN_EID_PREP;
120 break; 120 break;
121 default: 121 default:
122 kfree_skb(skb); 122 kfree_skb(skb);
123 return -ENOTSUPP; 123 return -ENOTSUPP;
124 break; 124 break;
125 } 125 }
126 *pos++ = ie_len; 126 *pos++ = ie_len;
127 *pos++ = flags; 127 *pos++ = flags;
128 *pos++ = hop_count; 128 *pos++ = hop_count;
129 *pos++ = ttl; 129 *pos++ = ttl;
130 if (action == MPATH_PREQ) { 130 if (action == MPATH_PREQ) {
131 memcpy(pos, &preq_id, 4); 131 memcpy(pos, &preq_id, 4);
132 pos += 4; 132 pos += 4;
133 } 133 }
134 memcpy(pos, orig_addr, ETH_ALEN); 134 memcpy(pos, orig_addr, ETH_ALEN);
135 pos += ETH_ALEN; 135 pos += ETH_ALEN;
136 memcpy(pos, &orig_dsn, 4); 136 memcpy(pos, &orig_dsn, 4);
137 pos += 4; 137 pos += 4;
138 memcpy(pos, &lifetime, 4); 138 memcpy(pos, &lifetime, 4);
139 pos += 4; 139 pos += 4;
140 memcpy(pos, &metric, 4); 140 memcpy(pos, &metric, 4);
141 pos += 4; 141 pos += 4;
142 if (action == MPATH_PREQ) { 142 if (action == MPATH_PREQ) {
143 /* destination count */ 143 /* destination count */
144 *pos++ = 1; 144 *pos++ = 1;
145 *pos++ = dst_flags; 145 *pos++ = dst_flags;
146 } 146 }
147 memcpy(pos, dst, ETH_ALEN); 147 memcpy(pos, dst, ETH_ALEN);
148 pos += ETH_ALEN; 148 pos += ETH_ALEN;
149 memcpy(pos, &dst_dsn, 4); 149 memcpy(pos, &dst_dsn, 4);
150 150
151 ieee80211_tx_skb(sdata, skb, 1); 151 ieee80211_tx_skb(sdata, skb, 1);
152 return 0; 152 return 0;
153 } 153 }
154 154
155 /** 155 /**
156 * mesh_send_path error - Sends a PERR mesh management frame 156 * mesh_send_path error - Sends a PERR mesh management frame
157 * 157 *
158 * @dst: broken destination 158 * @dst: broken destination
159 * @dst_dsn: dsn of the broken destination 159 * @dst_dsn: dsn of the broken destination
160 * @ra: node this frame is addressed to 160 * @ra: node this frame is addressed to
161 */ 161 */
162 int mesh_path_error_tx(u8 *dst, __le32 dst_dsn, u8 *ra, 162 int mesh_path_error_tx(u8 *dst, __le32 dst_dsn, u8 *ra,
163 struct ieee80211_sub_if_data *sdata) 163 struct ieee80211_sub_if_data *sdata)
164 { 164 {
165 struct ieee80211_local *local = sdata->local; 165 struct ieee80211_local *local = sdata->local;
166 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); 166 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
167 struct ieee80211_mgmt *mgmt; 167 struct ieee80211_mgmt *mgmt;
168 u8 *pos; 168 u8 *pos;
169 int ie_len; 169 int ie_len;
170 170
171 if (!skb) 171 if (!skb)
172 return -1; 172 return -1;
173 skb_reserve(skb, local->hw.extra_tx_headroom); 173 skb_reserve(skb, local->hw.extra_tx_headroom);
174 /* 25 is the size of the common mgmt part (24) plus the size of the 174 /* 25 is the size of the common mgmt part (24) plus the size of the
175 * common action part (1) 175 * common action part (1)
176 */ 176 */
177 mgmt = (struct ieee80211_mgmt *) 177 mgmt = (struct ieee80211_mgmt *)
178 skb_put(skb, 25 + sizeof(mgmt->u.action.u.mesh_action)); 178 skb_put(skb, 25 + sizeof(mgmt->u.action.u.mesh_action));
179 memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.mesh_action)); 179 memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.mesh_action));
180 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 180 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
181 IEEE80211_STYPE_ACTION); 181 IEEE80211_STYPE_ACTION);
182 182
183 memcpy(mgmt->da, ra, ETH_ALEN); 183 memcpy(mgmt->da, ra, ETH_ALEN);
184 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); 184 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
185 /* BSSID is left zeroed, wildcard value */ 185 /* BSSID is left zeroed, wildcard value */
186 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY; 186 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
187 mgmt->u.action.u.mesh_action.action_code = MPATH_PERR; 187 mgmt->u.action.u.mesh_action.action_code = MPATH_PERR;
188 ie_len = 12; 188 ie_len = 12;
189 pos = skb_put(skb, 2 + ie_len); 189 pos = skb_put(skb, 2 + ie_len);
190 *pos++ = WLAN_EID_PERR; 190 *pos++ = WLAN_EID_PERR;
191 *pos++ = ie_len; 191 *pos++ = ie_len;
192 /* mode flags, reserved */ 192 /* mode flags, reserved */
193 *pos++ = 0; 193 *pos++ = 0;
194 /* number of destinations */ 194 /* number of destinations */
195 *pos++ = 1; 195 *pos++ = 1;
196 memcpy(pos, dst, ETH_ALEN); 196 memcpy(pos, dst, ETH_ALEN);
197 pos += ETH_ALEN; 197 pos += ETH_ALEN;
198 memcpy(pos, &dst_dsn, 4); 198 memcpy(pos, &dst_dsn, 4);
199 199
200 ieee80211_tx_skb(sdata, skb, 1); 200 ieee80211_tx_skb(sdata, skb, 1);
201 return 0; 201 return 0;
202 } 202 }
203 203
204 void ieee80211s_update_metric(struct ieee80211_local *local, 204 void ieee80211s_update_metric(struct ieee80211_local *local,
205 struct sta_info *stainfo, struct sk_buff *skb) 205 struct sta_info *stainfo, struct sk_buff *skb)
206 { 206 {
207 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); 207 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
208 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 208 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
209 int failed; 209 int failed;
210 210
211 if (!ieee80211_is_data(hdr->frame_control)) 211 if (!ieee80211_is_data(hdr->frame_control))
212 return; 212 return;
213 213
214 failed = !(txinfo->flags & IEEE80211_TX_STAT_ACK); 214 failed = !(txinfo->flags & IEEE80211_TX_STAT_ACK);
215 215
216 /* moving average, scaled to 100 */ 216 /* moving average, scaled to 100 */
217 stainfo->fail_avg = ((80 * stainfo->fail_avg + 5) / 100 + 20 * failed); 217 stainfo->fail_avg = ((80 * stainfo->fail_avg + 5) / 100 + 20 * failed);
218 if (stainfo->fail_avg > 95) 218 if (stainfo->fail_avg > 95)
219 mesh_plink_broken(stainfo); 219 mesh_plink_broken(stainfo);
220 } 220 }
221 221
222 static u32 airtime_link_metric_get(struct ieee80211_local *local, 222 static u32 airtime_link_metric_get(struct ieee80211_local *local,
223 struct sta_info *sta) 223 struct sta_info *sta)
224 { 224 {
225 struct ieee80211_supported_band *sband; 225 struct ieee80211_supported_band *sband;
226 /* This should be adjusted for each device */ 226 /* This should be adjusted for each device */
227 int device_constant = 1 << ARITH_SHIFT; 227 int device_constant = 1 << ARITH_SHIFT;
228 int test_frame_len = TEST_FRAME_LEN << ARITH_SHIFT; 228 int test_frame_len = TEST_FRAME_LEN << ARITH_SHIFT;
229 int s_unit = 1 << ARITH_SHIFT; 229 int s_unit = 1 << ARITH_SHIFT;
230 int rate, err; 230 int rate, err;
231 u32 tx_time, estimated_retx; 231 u32 tx_time, estimated_retx;
232 u64 result; 232 u64 result;
233 233
234 sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; 234 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
235 235
236 if (sta->fail_avg >= 100) 236 if (sta->fail_avg >= 100)
237 return MAX_METRIC; 237 return MAX_METRIC;
238 238
239 if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS) 239 if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
240 return MAX_METRIC; 240 return MAX_METRIC;
241 241
242 err = (sta->fail_avg << ARITH_SHIFT) / 100; 242 err = (sta->fail_avg << ARITH_SHIFT) / 100;
243 243
244 /* bitrate is in units of 100 Kbps, while we need rate in units of 244 /* bitrate is in units of 100 Kbps, while we need rate in units of
245 * 1Mbps. This will be corrected on tx_time computation. 245 * 1Mbps. This will be corrected on tx_time computation.
246 */ 246 */
247 rate = sband->bitrates[sta->last_tx_rate.idx].bitrate; 247 rate = sband->bitrates[sta->last_tx_rate.idx].bitrate;
248 tx_time = (device_constant + 10 * test_frame_len / rate); 248 tx_time = (device_constant + 10 * test_frame_len / rate);
249 estimated_retx = ((1 << (2 * ARITH_SHIFT)) / (s_unit - err)); 249 estimated_retx = ((1 << (2 * ARITH_SHIFT)) / (s_unit - err));
250 result = (tx_time * estimated_retx) >> (2 * ARITH_SHIFT) ; 250 result = (tx_time * estimated_retx) >> (2 * ARITH_SHIFT) ;
251 return (u32)result; 251 return (u32)result;
252 } 252 }
253 253
254 /** 254 /**
255 * hwmp_route_info_get - Update routing info to originator and transmitter 255 * hwmp_route_info_get - Update routing info to originator and transmitter
256 * 256 *
257 * @sdata: local mesh subif 257 * @sdata: local mesh subif
258 * @mgmt: mesh management frame 258 * @mgmt: mesh management frame
259 * @hwmp_ie: hwmp information element (PREP or PREQ) 259 * @hwmp_ie: hwmp information element (PREP or PREQ)
260 * 260 *
261 * This function updates the path routing information to the originator and the 261 * This function updates the path routing information to the originator and the
262 * transmitter of a HWMP PREQ or PREP frame. 262 * transmitter of a HWMP PREQ or PREP frame.
263 * 263 *
264 * Returns: metric to frame originator or 0 if the frame should not be further 264 * Returns: metric to frame originator or 0 if the frame should not be further
265 * processed 265 * processed
266 * 266 *
267 * Notes: this function is the only place (besides user-provided info) where 267 * Notes: this function is the only place (besides user-provided info) where
268 * path routing information is updated. 268 * path routing information is updated.
269 */ 269 */
270 static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata, 270 static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
271 struct ieee80211_mgmt *mgmt, 271 struct ieee80211_mgmt *mgmt,
272 u8 *hwmp_ie) 272 u8 *hwmp_ie)
273 { 273 {
274 struct ieee80211_local *local = sdata->local; 274 struct ieee80211_local *local = sdata->local;
275 struct mesh_path *mpath; 275 struct mesh_path *mpath;
276 struct sta_info *sta; 276 struct sta_info *sta;
277 bool fresh_info; 277 bool fresh_info;
278 u8 *orig_addr, *ta; 278 u8 *orig_addr, *ta;
279 u32 orig_dsn, orig_metric; 279 u32 orig_dsn, orig_metric;
280 unsigned long orig_lifetime, exp_time; 280 unsigned long orig_lifetime, exp_time;
281 u32 last_hop_metric, new_metric; 281 u32 last_hop_metric, new_metric;
282 bool process = true; 282 bool process = true;
283 u8 action = mgmt->u.action.u.mesh_action.action_code; 283 u8 action = mgmt->u.action.u.mesh_action.action_code;
284 284
285 rcu_read_lock(); 285 rcu_read_lock();
286 sta = sta_info_get(local, mgmt->sa); 286 sta = sta_info_get(local, mgmt->sa);
287 if (!sta) { 287 if (!sta) {
288 rcu_read_unlock(); 288 rcu_read_unlock();
289 return 0; 289 return 0;
290 } 290 }
291 291
292 last_hop_metric = airtime_link_metric_get(local, sta); 292 last_hop_metric = airtime_link_metric_get(local, sta);
293 /* Update and check originator routing info */ 293 /* Update and check originator routing info */
294 fresh_info = true; 294 fresh_info = true;
295 295
296 switch (action) { 296 switch (action) {
297 case MPATH_PREQ: 297 case MPATH_PREQ:
298 orig_addr = PREQ_IE_ORIG_ADDR(hwmp_ie); 298 orig_addr = PREQ_IE_ORIG_ADDR(hwmp_ie);
299 orig_dsn = PREQ_IE_ORIG_DSN(hwmp_ie); 299 orig_dsn = PREQ_IE_ORIG_DSN(hwmp_ie);
300 orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie); 300 orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie);
301 orig_metric = PREQ_IE_METRIC(hwmp_ie); 301 orig_metric = PREQ_IE_METRIC(hwmp_ie);
302 break; 302 break;
303 case MPATH_PREP: 303 case MPATH_PREP:
304 /* Originator here refers to the MP that was the destination in 304 /* Originator here refers to the MP that was the destination in
305 * the Path Request. The draft refers to that MP as the 305 * the Path Request. The draft refers to that MP as the
306 * destination address, even though usually it is the origin of 306 * destination address, even though usually it is the origin of
307 * the PREP frame. We divert from the nomenclature in the draft 307 * the PREP frame. We divert from the nomenclature in the draft
308 * so that we can easily use a single function to gather path 308 * so that we can easily use a single function to gather path
309 * information from both PREQ and PREP frames. 309 * information from both PREQ and PREP frames.
310 */ 310 */
311 orig_addr = PREP_IE_ORIG_ADDR(hwmp_ie); 311 orig_addr = PREP_IE_ORIG_ADDR(hwmp_ie);
312 orig_dsn = PREP_IE_ORIG_DSN(hwmp_ie); 312 orig_dsn = PREP_IE_ORIG_DSN(hwmp_ie);
313 orig_lifetime = PREP_IE_LIFETIME(hwmp_ie); 313 orig_lifetime = PREP_IE_LIFETIME(hwmp_ie);
314 orig_metric = PREP_IE_METRIC(hwmp_ie); 314 orig_metric = PREP_IE_METRIC(hwmp_ie);
315 break; 315 break;
316 default: 316 default:
317 rcu_read_unlock(); 317 rcu_read_unlock();
318 return 0; 318 return 0;
319 } 319 }
320 new_metric = orig_metric + last_hop_metric; 320 new_metric = orig_metric + last_hop_metric;
321 if (new_metric < orig_metric) 321 if (new_metric < orig_metric)
322 new_metric = MAX_METRIC; 322 new_metric = MAX_METRIC;
323 exp_time = TU_TO_EXP_TIME(orig_lifetime); 323 exp_time = TU_TO_EXP_TIME(orig_lifetime);
324 324
325 if (memcmp(orig_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) { 325 if (memcmp(orig_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) {
326 /* This MP is the originator, we are not interested in this 326 /* This MP is the originator, we are not interested in this
327 * frame, except for updating transmitter's path info. 327 * frame, except for updating transmitter's path info.
328 */ 328 */
329 process = false; 329 process = false;
330 fresh_info = false; 330 fresh_info = false;
331 } else { 331 } else {
332 mpath = mesh_path_lookup(orig_addr, sdata); 332 mpath = mesh_path_lookup(orig_addr, sdata);
333 if (mpath) { 333 if (mpath) {
334 spin_lock_bh(&mpath->state_lock); 334 spin_lock_bh(&mpath->state_lock);
335 if (mpath->flags & MESH_PATH_FIXED) 335 if (mpath->flags & MESH_PATH_FIXED)
336 fresh_info = false; 336 fresh_info = false;
337 else if ((mpath->flags & MESH_PATH_ACTIVE) && 337 else if ((mpath->flags & MESH_PATH_ACTIVE) &&
338 (mpath->flags & MESH_PATH_DSN_VALID)) { 338 (mpath->flags & MESH_PATH_DSN_VALID)) {
339 if (DSN_GT(mpath->dsn, orig_dsn) || 339 if (DSN_GT(mpath->dsn, orig_dsn) ||
340 (mpath->dsn == orig_dsn && 340 (mpath->dsn == orig_dsn &&
341 action == MPATH_PREQ && 341 action == MPATH_PREQ &&
342 new_metric > mpath->metric)) { 342 new_metric > mpath->metric)) {
343 process = false; 343 process = false;
344 fresh_info = false; 344 fresh_info = false;
345 } 345 }
346 } 346 }
347 } else { 347 } else {
348 mesh_path_add(orig_addr, sdata); 348 mesh_path_add(orig_addr, sdata);
349 mpath = mesh_path_lookup(orig_addr, sdata); 349 mpath = mesh_path_lookup(orig_addr, sdata);
350 if (!mpath) { 350 if (!mpath) {
351 rcu_read_unlock(); 351 rcu_read_unlock();
352 return 0; 352 return 0;
353 } 353 }
354 spin_lock_bh(&mpath->state_lock); 354 spin_lock_bh(&mpath->state_lock);
355 } 355 }
356 356
357 if (fresh_info) { 357 if (fresh_info) {
358 mesh_path_assign_nexthop(mpath, sta); 358 mesh_path_assign_nexthop(mpath, sta);
359 mpath->flags |= MESH_PATH_DSN_VALID; 359 mpath->flags |= MESH_PATH_DSN_VALID;
360 mpath->metric = new_metric; 360 mpath->metric = new_metric;
361 mpath->dsn = orig_dsn; 361 mpath->dsn = orig_dsn;
362 mpath->exp_time = time_after(mpath->exp_time, exp_time) 362 mpath->exp_time = time_after(mpath->exp_time, exp_time)
363 ? mpath->exp_time : exp_time; 363 ? mpath->exp_time : exp_time;
364 mesh_path_activate(mpath); 364 mesh_path_activate(mpath);
365 spin_unlock_bh(&mpath->state_lock); 365 spin_unlock_bh(&mpath->state_lock);
366 mesh_path_tx_pending(mpath); 366 mesh_path_tx_pending(mpath);
367 /* draft says preq_id should be saved to, but there does 367 /* draft says preq_id should be saved to, but there does
368 * not seem to be any use for it, skipping by now 368 * not seem to be any use for it, skipping by now
369 */ 369 */
370 } else 370 } else
371 spin_unlock_bh(&mpath->state_lock); 371 spin_unlock_bh(&mpath->state_lock);
372 } 372 }
373 373
374 /* Update and check transmitter routing info */ 374 /* Update and check transmitter routing info */
375 ta = mgmt->sa; 375 ta = mgmt->sa;
376 if (memcmp(orig_addr, ta, ETH_ALEN) == 0) 376 if (memcmp(orig_addr, ta, ETH_ALEN) == 0)
377 fresh_info = false; 377 fresh_info = false;
378 else { 378 else {
379 fresh_info = true; 379 fresh_info = true;
380 380
381 mpath = mesh_path_lookup(ta, sdata); 381 mpath = mesh_path_lookup(ta, sdata);
382 if (mpath) { 382 if (mpath) {
383 spin_lock_bh(&mpath->state_lock); 383 spin_lock_bh(&mpath->state_lock);
384 if ((mpath->flags & MESH_PATH_FIXED) || 384 if ((mpath->flags & MESH_PATH_FIXED) ||
385 ((mpath->flags & MESH_PATH_ACTIVE) && 385 ((mpath->flags & MESH_PATH_ACTIVE) &&
386 (last_hop_metric > mpath->metric))) 386 (last_hop_metric > mpath->metric)))
387 fresh_info = false; 387 fresh_info = false;
388 } else { 388 } else {
389 mesh_path_add(ta, sdata); 389 mesh_path_add(ta, sdata);
390 mpath = mesh_path_lookup(ta, sdata); 390 mpath = mesh_path_lookup(ta, sdata);
391 if (!mpath) { 391 if (!mpath) {
392 rcu_read_unlock(); 392 rcu_read_unlock();
393 return 0; 393 return 0;
394 } 394 }
395 spin_lock_bh(&mpath->state_lock); 395 spin_lock_bh(&mpath->state_lock);
396 } 396 }
397 397
398 if (fresh_info) { 398 if (fresh_info) {
399 mesh_path_assign_nexthop(mpath, sta); 399 mesh_path_assign_nexthop(mpath, sta);
400 mpath->flags &= ~MESH_PATH_DSN_VALID; 400 mpath->flags &= ~MESH_PATH_DSN_VALID;
401 mpath->metric = last_hop_metric; 401 mpath->metric = last_hop_metric;
402 mpath->exp_time = time_after(mpath->exp_time, exp_time) 402 mpath->exp_time = time_after(mpath->exp_time, exp_time)
403 ? mpath->exp_time : exp_time; 403 ? mpath->exp_time : exp_time;
404 mesh_path_activate(mpath); 404 mesh_path_activate(mpath);
405 spin_unlock_bh(&mpath->state_lock); 405 spin_unlock_bh(&mpath->state_lock);
406 mesh_path_tx_pending(mpath); 406 mesh_path_tx_pending(mpath);
407 } else 407 } else
408 spin_unlock_bh(&mpath->state_lock); 408 spin_unlock_bh(&mpath->state_lock);
409 } 409 }
410 410
411 rcu_read_unlock(); 411 rcu_read_unlock();
412 412
413 return process ? new_metric : 0; 413 return process ? new_metric : 0;
414 } 414 }
415 415
416 static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata, 416 static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
417 struct ieee80211_mgmt *mgmt, 417 struct ieee80211_mgmt *mgmt,
418 u8 *preq_elem, u32 metric) 418 u8 *preq_elem, u32 metric)
419 { 419 {
420 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 420 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
421 struct mesh_path *mpath; 421 struct mesh_path *mpath;
422 u8 *dst_addr, *orig_addr; 422 u8 *dst_addr, *orig_addr;
423 u8 dst_flags, ttl; 423 u8 dst_flags, ttl;
424 u32 orig_dsn, dst_dsn, lifetime; 424 u32 orig_dsn, dst_dsn, lifetime;
425 bool reply = false; 425 bool reply = false;
426 bool forward = true; 426 bool forward = true;
427 427
428 /* Update destination DSN, if present */ 428 /* Update destination DSN, if present */
429 dst_addr = PREQ_IE_DST_ADDR(preq_elem); 429 dst_addr = PREQ_IE_DST_ADDR(preq_elem);
430 orig_addr = PREQ_IE_ORIG_ADDR(preq_elem); 430 orig_addr = PREQ_IE_ORIG_ADDR(preq_elem);
431 dst_dsn = PREQ_IE_DST_DSN(preq_elem); 431 dst_dsn = PREQ_IE_DST_DSN(preq_elem);
432 orig_dsn = PREQ_IE_ORIG_DSN(preq_elem); 432 orig_dsn = PREQ_IE_ORIG_DSN(preq_elem);
433 dst_flags = PREQ_IE_DST_F(preq_elem); 433 dst_flags = PREQ_IE_DST_F(preq_elem);
434 434
435 if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) { 435 if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) {
436 forward = false; 436 forward = false;
437 reply = true; 437 reply = true;
438 metric = 0; 438 metric = 0;
439 if (time_after(jiffies, ifmsh->last_dsn_update + 439 if (time_after(jiffies, ifmsh->last_dsn_update +
440 net_traversal_jiffies(sdata)) || 440 net_traversal_jiffies(sdata)) ||
441 time_before(jiffies, ifmsh->last_dsn_update)) { 441 time_before(jiffies, ifmsh->last_dsn_update)) {
442 dst_dsn = ++ifmsh->dsn; 442 dst_dsn = ++ifmsh->dsn;
443 ifmsh->last_dsn_update = jiffies; 443 ifmsh->last_dsn_update = jiffies;
444 } 444 }
445 } else { 445 } else {
446 rcu_read_lock(); 446 rcu_read_lock();
447 mpath = mesh_path_lookup(dst_addr, sdata); 447 mpath = mesh_path_lookup(dst_addr, sdata);
448 if (mpath) { 448 if (mpath) {
449 if ((!(mpath->flags & MESH_PATH_DSN_VALID)) || 449 if ((!(mpath->flags & MESH_PATH_DSN_VALID)) ||
450 DSN_LT(mpath->dsn, dst_dsn)) { 450 DSN_LT(mpath->dsn, dst_dsn)) {
451 mpath->dsn = dst_dsn; 451 mpath->dsn = dst_dsn;
452 mpath->flags |= MESH_PATH_DSN_VALID; 452 mpath->flags |= MESH_PATH_DSN_VALID;
453 } else if ((!(dst_flags & MP_F_DO)) && 453 } else if ((!(dst_flags & MP_F_DO)) &&
454 (mpath->flags & MESH_PATH_ACTIVE)) { 454 (mpath->flags & MESH_PATH_ACTIVE)) {
455 reply = true; 455 reply = true;
456 metric = mpath->metric; 456 metric = mpath->metric;
457 dst_dsn = mpath->dsn; 457 dst_dsn = mpath->dsn;
458 if (dst_flags & MP_F_RF) 458 if (dst_flags & MP_F_RF)
459 dst_flags |= MP_F_DO; 459 dst_flags |= MP_F_DO;
460 else 460 else
461 forward = false; 461 forward = false;
462 } 462 }
463 } 463 }
464 rcu_read_unlock(); 464 rcu_read_unlock();
465 } 465 }
466 466
467 if (reply) { 467 if (reply) {
468 lifetime = PREQ_IE_LIFETIME(preq_elem); 468 lifetime = PREQ_IE_LIFETIME(preq_elem);
469 ttl = ifmsh->mshcfg.dot11MeshTTL; 469 ttl = ifmsh->mshcfg.dot11MeshTTL;
470 if (ttl != 0) 470 if (ttl != 0)
471 mesh_path_sel_frame_tx(MPATH_PREP, 0, dst_addr, 471 mesh_path_sel_frame_tx(MPATH_PREP, 0, dst_addr,
472 cpu_to_le32(dst_dsn), 0, orig_addr, 472 cpu_to_le32(dst_dsn), 0, orig_addr,
473 cpu_to_le32(orig_dsn), mgmt->sa, 0, ttl, 473 cpu_to_le32(orig_dsn), mgmt->sa, 0, ttl,
474 cpu_to_le32(lifetime), cpu_to_le32(metric), 474 cpu_to_le32(lifetime), cpu_to_le32(metric),
475 0, sdata); 475 0, sdata);
476 else 476 else
477 ifmsh->mshstats.dropped_frames_ttl++; 477 ifmsh->mshstats.dropped_frames_ttl++;
478 } 478 }
479 479
480 if (forward) { 480 if (forward) {
481 u32 preq_id; 481 u32 preq_id;
482 u8 hopcount, flags; 482 u8 hopcount, flags;
483 483
484 ttl = PREQ_IE_TTL(preq_elem); 484 ttl = PREQ_IE_TTL(preq_elem);
485 lifetime = PREQ_IE_LIFETIME(preq_elem); 485 lifetime = PREQ_IE_LIFETIME(preq_elem);
486 if (ttl <= 1) { 486 if (ttl <= 1) {
487 ifmsh->mshstats.dropped_frames_ttl++; 487 ifmsh->mshstats.dropped_frames_ttl++;
488 return; 488 return;
489 } 489 }
490 --ttl; 490 --ttl;
491 flags = PREQ_IE_FLAGS(preq_elem); 491 flags = PREQ_IE_FLAGS(preq_elem);
492 preq_id = PREQ_IE_PREQ_ID(preq_elem); 492 preq_id = PREQ_IE_PREQ_ID(preq_elem);
493 hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1; 493 hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1;
494 mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr, 494 mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr,
495 cpu_to_le32(orig_dsn), dst_flags, dst_addr, 495 cpu_to_le32(orig_dsn), dst_flags, dst_addr,
496 cpu_to_le32(dst_dsn), sdata->dev->broadcast, 496 cpu_to_le32(dst_dsn), sdata->dev->broadcast,
497 hopcount, ttl, cpu_to_le32(lifetime), 497 hopcount, ttl, cpu_to_le32(lifetime),
498 cpu_to_le32(metric), cpu_to_le32(preq_id), 498 cpu_to_le32(metric), cpu_to_le32(preq_id),
499 sdata); 499 sdata);
500 ifmsh->mshstats.fwded_mcast++; 500 ifmsh->mshstats.fwded_mcast++;
501 ifmsh->mshstats.fwded_frames++; 501 ifmsh->mshstats.fwded_frames++;
502 } 502 }
503 } 503 }
504 504
505 505
506 static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata, 506 static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
507 struct ieee80211_mgmt *mgmt, 507 struct ieee80211_mgmt *mgmt,
508 u8 *prep_elem, u32 metric) 508 u8 *prep_elem, u32 metric)
509 { 509 {
510 struct mesh_path *mpath; 510 struct mesh_path *mpath;
511 u8 *dst_addr, *orig_addr; 511 u8 *dst_addr, *orig_addr;
512 u8 ttl, hopcount, flags; 512 u8 ttl, hopcount, flags;
513 u8 next_hop[ETH_ALEN]; 513 u8 next_hop[ETH_ALEN];
514 u32 dst_dsn, orig_dsn, lifetime; 514 u32 dst_dsn, orig_dsn, lifetime;
515 515
516 /* Note that we divert from the draft nomenclature and denominate 516 /* Note that we divert from the draft nomenclature and denominate
517 * destination to what the draft refers to as origininator. So in this 517 * destination to what the draft refers to as origininator. So in this
518 * function destnation refers to the final destination of the PREP, 518 * function destnation refers to the final destination of the PREP,
519 * which corresponds with the originator of the PREQ which this PREP 519 * which corresponds with the originator of the PREQ which this PREP
520 * replies 520 * replies
521 */ 521 */
522 dst_addr = PREP_IE_DST_ADDR(prep_elem); 522 dst_addr = PREP_IE_DST_ADDR(prep_elem);
523 if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) 523 if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0)
524 /* destination, no forwarding required */ 524 /* destination, no forwarding required */
525 return; 525 return;
526 526
527 ttl = PREP_IE_TTL(prep_elem); 527 ttl = PREP_IE_TTL(prep_elem);
528 if (ttl <= 1) { 528 if (ttl <= 1) {
529 sdata->u.mesh.mshstats.dropped_frames_ttl++; 529 sdata->u.mesh.mshstats.dropped_frames_ttl++;
530 return; 530 return;
531 } 531 }
532 532
533 rcu_read_lock(); 533 rcu_read_lock();
534 mpath = mesh_path_lookup(dst_addr, sdata); 534 mpath = mesh_path_lookup(dst_addr, sdata);
535 if (mpath) 535 if (mpath)
536 spin_lock_bh(&mpath->state_lock); 536 spin_lock_bh(&mpath->state_lock);
537 else 537 else
538 goto fail; 538 goto fail;
539 if (!(mpath->flags & MESH_PATH_ACTIVE)) { 539 if (!(mpath->flags & MESH_PATH_ACTIVE)) {
540 spin_unlock_bh(&mpath->state_lock); 540 spin_unlock_bh(&mpath->state_lock);
541 goto fail; 541 goto fail;
542 } 542 }
543 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN); 543 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
544 spin_unlock_bh(&mpath->state_lock); 544 spin_unlock_bh(&mpath->state_lock);
545 --ttl; 545 --ttl;
546 flags = PREP_IE_FLAGS(prep_elem); 546 flags = PREP_IE_FLAGS(prep_elem);
547 lifetime = PREP_IE_LIFETIME(prep_elem); 547 lifetime = PREP_IE_LIFETIME(prep_elem);
548 hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1; 548 hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1;
549 orig_addr = PREP_IE_ORIG_ADDR(prep_elem); 549 orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
550 dst_dsn = PREP_IE_DST_DSN(prep_elem); 550 dst_dsn = PREP_IE_DST_DSN(prep_elem);
551 orig_dsn = PREP_IE_ORIG_DSN(prep_elem); 551 orig_dsn = PREP_IE_ORIG_DSN(prep_elem);
552 552
553 mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr, 553 mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr,
554 cpu_to_le32(orig_dsn), 0, dst_addr, 554 cpu_to_le32(orig_dsn), 0, dst_addr,
555 cpu_to_le32(dst_dsn), mpath->next_hop->sta.addr, hopcount, ttl, 555 cpu_to_le32(dst_dsn), mpath->next_hop->sta.addr, hopcount, ttl,
556 cpu_to_le32(lifetime), cpu_to_le32(metric), 556 cpu_to_le32(lifetime), cpu_to_le32(metric),
557 0, sdata); 557 0, sdata);
558 rcu_read_unlock(); 558 rcu_read_unlock();
559 559
560 sdata->u.mesh.mshstats.fwded_unicast++; 560 sdata->u.mesh.mshstats.fwded_unicast++;
561 sdata->u.mesh.mshstats.fwded_frames++; 561 sdata->u.mesh.mshstats.fwded_frames++;
562 return; 562 return;
563 563
564 fail: 564 fail:
565 rcu_read_unlock(); 565 rcu_read_unlock();
566 sdata->u.mesh.mshstats.dropped_frames_no_route++; 566 sdata->u.mesh.mshstats.dropped_frames_no_route++;
567 return; 567 return;
568 } 568 }
569 569
570 static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata, 570 static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
571 struct ieee80211_mgmt *mgmt, u8 *perr_elem) 571 struct ieee80211_mgmt *mgmt, u8 *perr_elem)
572 { 572 {
573 struct mesh_path *mpath; 573 struct mesh_path *mpath;
574 u8 *ta, *dst_addr; 574 u8 *ta, *dst_addr;
575 u32 dst_dsn; 575 u32 dst_dsn;
576 576
577 ta = mgmt->sa; 577 ta = mgmt->sa;
578 dst_addr = PERR_IE_DST_ADDR(perr_elem); 578 dst_addr = PERR_IE_DST_ADDR(perr_elem);
579 dst_dsn = PERR_IE_DST_DSN(perr_elem); 579 dst_dsn = PERR_IE_DST_DSN(perr_elem);
580 rcu_read_lock(); 580 rcu_read_lock();
581 mpath = mesh_path_lookup(dst_addr, sdata); 581 mpath = mesh_path_lookup(dst_addr, sdata);
582 if (mpath) { 582 if (mpath) {
583 spin_lock_bh(&mpath->state_lock); 583 spin_lock_bh(&mpath->state_lock);
584 if (mpath->flags & MESH_PATH_ACTIVE && 584 if (mpath->flags & MESH_PATH_ACTIVE &&
585 memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 && 585 memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 &&
586 (!(mpath->flags & MESH_PATH_DSN_VALID) || 586 (!(mpath->flags & MESH_PATH_DSN_VALID) ||
587 DSN_GT(dst_dsn, mpath->dsn))) { 587 DSN_GT(dst_dsn, mpath->dsn))) {
588 mpath->flags &= ~MESH_PATH_ACTIVE; 588 mpath->flags &= ~MESH_PATH_ACTIVE;
589 mpath->dsn = dst_dsn; 589 mpath->dsn = dst_dsn;
590 spin_unlock_bh(&mpath->state_lock); 590 spin_unlock_bh(&mpath->state_lock);
591 mesh_path_error_tx(dst_addr, cpu_to_le32(dst_dsn), 591 mesh_path_error_tx(dst_addr, cpu_to_le32(dst_dsn),
592 sdata->dev->broadcast, sdata); 592 sdata->dev->broadcast, sdata);
593 } else 593 } else
594 spin_unlock_bh(&mpath->state_lock); 594 spin_unlock_bh(&mpath->state_lock);
595 } 595 }
596 rcu_read_unlock(); 596 rcu_read_unlock();
597 } 597 }
598 598
599 599
600 600
601 void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata, 601 void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
602 struct ieee80211_mgmt *mgmt, 602 struct ieee80211_mgmt *mgmt,
603 size_t len) 603 size_t len)
604 { 604 {
605 struct ieee802_11_elems elems; 605 struct ieee802_11_elems elems;
606 size_t baselen; 606 size_t baselen;
607 u32 last_hop_metric; 607 u32 last_hop_metric;
608 608
609 /* need action_code */ 609 /* need action_code */
610 if (len < IEEE80211_MIN_ACTION_SIZE + 1) 610 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
611 return; 611 return;
612 612
613 baselen = (u8 *) mgmt->u.action.u.mesh_action.variable - (u8 *) mgmt; 613 baselen = (u8 *) mgmt->u.action.u.mesh_action.variable - (u8 *) mgmt;
614 ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable, 614 ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable,
615 len - baselen, &elems); 615 len - baselen, &elems);
616 616
617 switch (mgmt->u.action.u.mesh_action.action_code) { 617 switch (mgmt->u.action.u.mesh_action.action_code) {
618 case MPATH_PREQ: 618 case MPATH_PREQ:
619 if (!elems.preq || elems.preq_len != 37) 619 if (!elems.preq || elems.preq_len != 37)
620 /* Right now we support just 1 destination and no AE */ 620 /* Right now we support just 1 destination and no AE */
621 return; 621 return;
622 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq); 622 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq);
623 if (!last_hop_metric) 623 if (!last_hop_metric)
624 return; 624 return;
625 hwmp_preq_frame_process(sdata, mgmt, elems.preq, last_hop_metric); 625 hwmp_preq_frame_process(sdata, mgmt, elems.preq, last_hop_metric);
626 break; 626 break;
627 case MPATH_PREP: 627 case MPATH_PREP:
628 if (!elems.prep || elems.prep_len != 31) 628 if (!elems.prep || elems.prep_len != 31)
629 /* Right now we support no AE */ 629 /* Right now we support no AE */
630 return; 630 return;
631 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep); 631 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep);
632 if (!last_hop_metric) 632 if (!last_hop_metric)
633 return; 633 return;
634 hwmp_prep_frame_process(sdata, mgmt, elems.prep, last_hop_metric); 634 hwmp_prep_frame_process(sdata, mgmt, elems.prep, last_hop_metric);
635 break; 635 break;
636 case MPATH_PERR: 636 case MPATH_PERR:
637 if (!elems.perr || elems.perr_len != 12) 637 if (!elems.perr || elems.perr_len != 12)
638 /* Right now we support only one destination per PERR */ 638 /* Right now we support only one destination per PERR */
639 return; 639 return;
640 hwmp_perr_frame_process(sdata, mgmt, elems.perr); 640 hwmp_perr_frame_process(sdata, mgmt, elems.perr);
641 default: 641 default:
642 return; 642 return;
643 } 643 }
644 644
645 } 645 }
646 646
647 /** 647 /**
648 * mesh_queue_preq - queue a PREQ to a given destination 648 * mesh_queue_preq - queue a PREQ to a given destination
649 * 649 *
650 * @mpath: mesh path to discover 650 * @mpath: mesh path to discover
651 * @flags: special attributes of the PREQ to be sent 651 * @flags: special attributes of the PREQ to be sent
652 * 652 *
653 * Locking: the function must be called from within a rcu read lock block. 653 * Locking: the function must be called from within a rcu read lock block.
654 * 654 *
655 */ 655 */
656 static void mesh_queue_preq(struct mesh_path *mpath, u8 flags) 656 static void mesh_queue_preq(struct mesh_path *mpath, u8 flags)
657 { 657 {
658 struct ieee80211_sub_if_data *sdata = mpath->sdata; 658 struct ieee80211_sub_if_data *sdata = mpath->sdata;
659 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 659 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
660 struct mesh_preq_queue *preq_node; 660 struct mesh_preq_queue *preq_node;
661 661
662 preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC); 662 preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC);
663 if (!preq_node) { 663 if (!preq_node) {
664 printk(KERN_DEBUG "Mesh HWMP: could not allocate PREQ node\n"); 664 printk(KERN_DEBUG "Mesh HWMP: could not allocate PREQ node\n");
665 return; 665 return;
666 } 666 }
667 667
668 spin_lock(&ifmsh->mesh_preq_queue_lock); 668 spin_lock(&ifmsh->mesh_preq_queue_lock);
669 if (ifmsh->preq_queue_len == MAX_PREQ_QUEUE_LEN) { 669 if (ifmsh->preq_queue_len == MAX_PREQ_QUEUE_LEN) {
670 spin_unlock(&ifmsh->mesh_preq_queue_lock); 670 spin_unlock(&ifmsh->mesh_preq_queue_lock);
671 kfree(preq_node); 671 kfree(preq_node);
672 if (printk_ratelimit()) 672 if (printk_ratelimit())
673 printk(KERN_DEBUG "Mesh HWMP: PREQ node queue full\n"); 673 printk(KERN_DEBUG "Mesh HWMP: PREQ node queue full\n");
674 return; 674 return;
675 } 675 }
676 676
677 memcpy(preq_node->dst, mpath->dst, ETH_ALEN); 677 memcpy(preq_node->dst, mpath->dst, ETH_ALEN);
678 preq_node->flags = flags; 678 preq_node->flags = flags;
679 679
680 list_add_tail(&preq_node->list, &ifmsh->preq_queue.list); 680 list_add_tail(&preq_node->list, &ifmsh->preq_queue.list);
681 ++ifmsh->preq_queue_len; 681 ++ifmsh->preq_queue_len;
682 spin_unlock(&ifmsh->mesh_preq_queue_lock); 682 spin_unlock(&ifmsh->mesh_preq_queue_lock);
683 683
684 if (time_after(jiffies, ifmsh->last_preq + min_preq_int_jiff(sdata))) 684 if (time_after(jiffies, ifmsh->last_preq + min_preq_int_jiff(sdata)))
685 ieee80211_queue_work(&sdata->local->hw, &ifmsh->work); 685 ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
686 686
687 else if (time_before(jiffies, ifmsh->last_preq)) { 687 else if (time_before(jiffies, ifmsh->last_preq)) {
688 /* avoid long wait if did not send preqs for a long time 688 /* avoid long wait if did not send preqs for a long time
689 * and jiffies wrapped around 689 * and jiffies wrapped around
690 */ 690 */
691 ifmsh->last_preq = jiffies - min_preq_int_jiff(sdata) - 1; 691 ifmsh->last_preq = jiffies - min_preq_int_jiff(sdata) - 1;
692 ieee80211_queue_work(&sdata->local->hw, &ifmsh->work); 692 ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
693 } else 693 } else
694 mod_timer(&ifmsh->mesh_path_timer, ifmsh->last_preq + 694 mod_timer(&ifmsh->mesh_path_timer, ifmsh->last_preq +
695 min_preq_int_jiff(sdata)); 695 min_preq_int_jiff(sdata));
696 } 696 }
697 697
698 /** 698 /**
699 * mesh_path_start_discovery - launch a path discovery from the PREQ queue 699 * mesh_path_start_discovery - launch a path discovery from the PREQ queue
700 * 700 *
701 * @sdata: local mesh subif 701 * @sdata: local mesh subif
702 */ 702 */
703 void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata) 703 void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
704 { 704 {
705 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 705 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
706 struct mesh_preq_queue *preq_node; 706 struct mesh_preq_queue *preq_node;
707 struct mesh_path *mpath; 707 struct mesh_path *mpath;
708 u8 ttl, dst_flags; 708 u8 ttl, dst_flags;
709 u32 lifetime; 709 u32 lifetime;
710 710
711 spin_lock_bh(&ifmsh->mesh_preq_queue_lock); 711 spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
712 if (!ifmsh->preq_queue_len || 712 if (!ifmsh->preq_queue_len ||
713 time_before(jiffies, ifmsh->last_preq + 713 time_before(jiffies, ifmsh->last_preq +
714 min_preq_int_jiff(sdata))) { 714 min_preq_int_jiff(sdata))) {
715 spin_unlock_bh(&ifmsh->mesh_preq_queue_lock); 715 spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
716 return; 716 return;
717 } 717 }
718 718
719 preq_node = list_first_entry(&ifmsh->preq_queue.list, 719 preq_node = list_first_entry(&ifmsh->preq_queue.list,
720 struct mesh_preq_queue, list); 720 struct mesh_preq_queue, list);
721 list_del(&preq_node->list); 721 list_del(&preq_node->list);
722 --ifmsh->preq_queue_len; 722 --ifmsh->preq_queue_len;
723 spin_unlock_bh(&ifmsh->mesh_preq_queue_lock); 723 spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
724 724
725 rcu_read_lock(); 725 rcu_read_lock();
726 mpath = mesh_path_lookup(preq_node->dst, sdata); 726 mpath = mesh_path_lookup(preq_node->dst, sdata);
727 if (!mpath) 727 if (!mpath)
728 goto enddiscovery; 728 goto enddiscovery;
729 729
730 spin_lock_bh(&mpath->state_lock); 730 spin_lock_bh(&mpath->state_lock);
731 if (preq_node->flags & PREQ_Q_F_START) { 731 if (preq_node->flags & PREQ_Q_F_START) {
732 if (mpath->flags & MESH_PATH_RESOLVING) { 732 if (mpath->flags & MESH_PATH_RESOLVING) {
733 spin_unlock_bh(&mpath->state_lock); 733 spin_unlock_bh(&mpath->state_lock);
734 goto enddiscovery; 734 goto enddiscovery;
735 } else { 735 } else {
736 mpath->flags &= ~MESH_PATH_RESOLVED; 736 mpath->flags &= ~MESH_PATH_RESOLVED;
737 mpath->flags |= MESH_PATH_RESOLVING; 737 mpath->flags |= MESH_PATH_RESOLVING;
738 mpath->discovery_retries = 0; 738 mpath->discovery_retries = 0;
739 mpath->discovery_timeout = disc_timeout_jiff(sdata); 739 mpath->discovery_timeout = disc_timeout_jiff(sdata);
740 } 740 }
741 } else if (!(mpath->flags & MESH_PATH_RESOLVING) || 741 } else if (!(mpath->flags & MESH_PATH_RESOLVING) ||
742 mpath->flags & MESH_PATH_RESOLVED) { 742 mpath->flags & MESH_PATH_RESOLVED) {
743 mpath->flags &= ~MESH_PATH_RESOLVING; 743 mpath->flags &= ~MESH_PATH_RESOLVING;
744 spin_unlock_bh(&mpath->state_lock); 744 spin_unlock_bh(&mpath->state_lock);
745 goto enddiscovery; 745 goto enddiscovery;
746 } 746 }
747 747
748 ifmsh->last_preq = jiffies; 748 ifmsh->last_preq = jiffies;
749 749
750 if (time_after(jiffies, ifmsh->last_dsn_update + 750 if (time_after(jiffies, ifmsh->last_dsn_update +
751 net_traversal_jiffies(sdata)) || 751 net_traversal_jiffies(sdata)) ||
752 time_before(jiffies, ifmsh->last_dsn_update)) { 752 time_before(jiffies, ifmsh->last_dsn_update)) {
753 ++ifmsh->dsn; 753 ++ifmsh->dsn;
754 sdata->u.mesh.last_dsn_update = jiffies; 754 sdata->u.mesh.last_dsn_update = jiffies;
755 } 755 }
756 lifetime = default_lifetime(sdata); 756 lifetime = default_lifetime(sdata);
757 ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 757 ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
758 if (ttl == 0) { 758 if (ttl == 0) {
759 sdata->u.mesh.mshstats.dropped_frames_ttl++; 759 sdata->u.mesh.mshstats.dropped_frames_ttl++;
760 spin_unlock_bh(&mpath->state_lock); 760 spin_unlock_bh(&mpath->state_lock);
761 goto enddiscovery; 761 goto enddiscovery;
762 } 762 }
763 763
764 if (preq_node->flags & PREQ_Q_F_REFRESH) 764 if (preq_node->flags & PREQ_Q_F_REFRESH)
765 dst_flags = MP_F_DO; 765 dst_flags = MP_F_DO;
766 else 766 else
767 dst_flags = MP_F_RF; 767 dst_flags = MP_F_RF;
768 768
769 spin_unlock_bh(&mpath->state_lock); 769 spin_unlock_bh(&mpath->state_lock);
770 mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr, 770 mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr,
771 cpu_to_le32(ifmsh->dsn), dst_flags, mpath->dst, 771 cpu_to_le32(ifmsh->dsn), dst_flags, mpath->dst,
772 cpu_to_le32(mpath->dsn), sdata->dev->broadcast, 0, 772 cpu_to_le32(mpath->dsn), sdata->dev->broadcast, 0,
773 ttl, cpu_to_le32(lifetime), 0, 773 ttl, cpu_to_le32(lifetime), 0,
774 cpu_to_le32(ifmsh->preq_id++), sdata); 774 cpu_to_le32(ifmsh->preq_id++), sdata);
775 mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout); 775 mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);
776 776
777 enddiscovery: 777 enddiscovery:
778 rcu_read_unlock(); 778 rcu_read_unlock();
779 kfree(preq_node); 779 kfree(preq_node);
780 } 780 }
781 781
782 /** 782 /**
783 * mesh_nexthop_lookup - put the appropriate next hop on a mesh frame 783 * mesh_nexthop_lookup - put the appropriate next hop on a mesh frame
784 * 784 *
785 * @skb: 802.11 frame to be sent 785 * @skb: 802.11 frame to be sent
786 * @sdata: network subif the frame will be sent through 786 * @sdata: network subif the frame will be sent through
787 * 787 *
788 * Returns: 0 if the next hop was found. Nonzero otherwise. If no next hop is 788 * Returns: 0 if the next hop was found. Nonzero otherwise. If no next hop is
789 * found, the function will start a path discovery and queue the frame so it is 789 * found, the function will start a path discovery and queue the frame so it is
790 * sent when the path is resolved. This means the caller must not free the skb 790 * sent when the path is resolved. This means the caller must not free the skb
791 * in this case. 791 * in this case.
792 */ 792 */
793 int mesh_nexthop_lookup(struct sk_buff *skb, 793 int mesh_nexthop_lookup(struct sk_buff *skb,
794 struct ieee80211_sub_if_data *sdata) 794 struct ieee80211_sub_if_data *sdata)
795 { 795 {
796 struct sk_buff *skb_to_free = NULL; 796 struct sk_buff *skb_to_free = NULL;
797 struct mesh_path *mpath; 797 struct mesh_path *mpath;
798 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 798 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
799 u8 *dst_addr = hdr->addr3; 799 u8 *dst_addr = hdr->addr3;
800 int err = 0; 800 int err = 0;
801 801
802 rcu_read_lock(); 802 rcu_read_lock();
803 mpath = mesh_path_lookup(dst_addr, sdata); 803 mpath = mesh_path_lookup(dst_addr, sdata);
804 804
805 if (!mpath) { 805 if (!mpath) {
806 mesh_path_add(dst_addr, sdata); 806 mesh_path_add(dst_addr, sdata);
807 mpath = mesh_path_lookup(dst_addr, sdata); 807 mpath = mesh_path_lookup(dst_addr, sdata);
808 if (!mpath) { 808 if (!mpath) {
809 sdata->u.mesh.mshstats.dropped_frames_no_route++; 809 sdata->u.mesh.mshstats.dropped_frames_no_route++;
810 err = -ENOSPC; 810 err = -ENOSPC;
811 goto endlookup; 811 goto endlookup;
812 } 812 }
813 } 813 }
814 814
815 if (mpath->flags & MESH_PATH_ACTIVE) { 815 if (mpath->flags & MESH_PATH_ACTIVE) {
816 if (time_after(jiffies, mpath->exp_time + 816 if (time_after(jiffies, mpath->exp_time +
817 msecs_to_jiffies(sdata->u.mesh.mshcfg.path_refresh_time)) 817 msecs_to_jiffies(sdata->u.mesh.mshcfg.path_refresh_time))
818 && !memcmp(sdata->dev->dev_addr, hdr->addr4, 818 && !memcmp(sdata->dev->dev_addr, hdr->addr4,
819 ETH_ALEN) 819 ETH_ALEN)
820 && !(mpath->flags & MESH_PATH_RESOLVING) 820 && !(mpath->flags & MESH_PATH_RESOLVING)
821 && !(mpath->flags & MESH_PATH_FIXED)) { 821 && !(mpath->flags & MESH_PATH_FIXED)) {
822 mesh_queue_preq(mpath, 822 mesh_queue_preq(mpath,
823 PREQ_Q_F_START | PREQ_Q_F_REFRESH); 823 PREQ_Q_F_START | PREQ_Q_F_REFRESH);
824 } 824 }
825 memcpy(hdr->addr1, mpath->next_hop->sta.addr, 825 memcpy(hdr->addr1, mpath->next_hop->sta.addr,
826 ETH_ALEN); 826 ETH_ALEN);
827 } else { 827 } else {
828 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 828 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
829 if (!(mpath->flags & MESH_PATH_RESOLVING)) { 829 if (!(mpath->flags & MESH_PATH_RESOLVING)) {
830 /* Start discovery only if it is not running yet */ 830 /* Start discovery only if it is not running yet */
831 mesh_queue_preq(mpath, PREQ_Q_F_START); 831 mesh_queue_preq(mpath, PREQ_Q_F_START);
832 } 832 }
833 833
834 if (skb_queue_len(&mpath->frame_queue) >= 834 if (skb_queue_len(&mpath->frame_queue) >=
835 MESH_FRAME_QUEUE_LEN) 835 MESH_FRAME_QUEUE_LEN)
836 skb_to_free = skb_dequeue(&mpath->frame_queue); 836 skb_to_free = skb_dequeue(&mpath->frame_queue);
837 837
838 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; 838 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
839 skb_queue_tail(&mpath->frame_queue, skb); 839 skb_queue_tail(&mpath->frame_queue, skb);
840 if (skb_to_free) 840 if (skb_to_free)
841 mesh_path_discard_frame(skb_to_free, sdata); 841 mesh_path_discard_frame(skb_to_free, sdata);
842 err = -ENOENT; 842 err = -ENOENT;
843 } 843 }
844 844
845 endlookup: 845 endlookup:
846 rcu_read_unlock(); 846 rcu_read_unlock();
847 return err; 847 return err;
848 } 848 }
849 849
850 void mesh_path_timer(unsigned long data) 850 void mesh_path_timer(unsigned long data)
851 { 851 {
852 struct ieee80211_sub_if_data *sdata; 852 struct ieee80211_sub_if_data *sdata;
853 struct mesh_path *mpath; 853 struct mesh_path *mpath;
854 854
855 rcu_read_lock(); 855 rcu_read_lock();
856 mpath = (struct mesh_path *) data; 856 mpath = (struct mesh_path *) data;
857 mpath = rcu_dereference(mpath); 857 mpath = rcu_dereference(mpath);
858 if (!mpath) 858 if (!mpath)
859 goto endmpathtimer; 859 goto endmpathtimer;
860 sdata = mpath->sdata; 860 sdata = mpath->sdata;
861 861
862 if (sdata->local->quiescing) { 862 if (sdata->local->quiescing) {
863 rcu_read_unlock(); 863 rcu_read_unlock();
864 return; 864 return;
865 } 865 }
866 866
867 spin_lock_bh(&mpath->state_lock); 867 spin_lock_bh(&mpath->state_lock);
868 if (mpath->flags & MESH_PATH_RESOLVED || 868 if (mpath->flags & MESH_PATH_RESOLVED ||
869 (!(mpath->flags & MESH_PATH_RESOLVING))) 869 (!(mpath->flags & MESH_PATH_RESOLVING)))
870 mpath->flags &= ~(MESH_PATH_RESOLVING | MESH_PATH_RESOLVED); 870 mpath->flags &= ~(MESH_PATH_RESOLVING | MESH_PATH_RESOLVED);
871 else if (mpath->discovery_retries < max_preq_retries(sdata)) { 871 else if (mpath->discovery_retries < max_preq_retries(sdata)) {
872 ++mpath->discovery_retries; 872 ++mpath->discovery_retries;
873 mpath->discovery_timeout *= 2; 873 mpath->discovery_timeout *= 2;
874 mesh_queue_preq(mpath, 0); 874 mesh_queue_preq(mpath, 0);
875 } else { 875 } else {
876 mpath->flags = 0; 876 mpath->flags = 0;
877 mpath->exp_time = jiffies; 877 mpath->exp_time = jiffies;
878 mesh_path_flush_pending(mpath); 878 mesh_path_flush_pending(mpath);
879 } 879 }
880 880
881 spin_unlock_bh(&mpath->state_lock); 881 spin_unlock_bh(&mpath->state_lock);
882 endmpathtimer: 882 endmpathtimer:
883 rcu_read_unlock(); 883 rcu_read_unlock();
884 } 884 }
885 885