aboutsummaryrefslogtreecommitdiffstats
path: root/net/mac80211/mesh_hwmp.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/mac80211/mesh_hwmp.c')
-rw-r--r--net/mac80211/mesh_hwmp.c388
1 files changed, 260 insertions, 128 deletions
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 29b82e98effa..5c67e7b8790f 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -1,5 +1,5 @@
1/* 1/*
2 * Copyright (c) 2008 open80211s Ltd. 2 * Copyright (c) 2008, 2009 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
@@ -9,6 +9,12 @@
9 9
10#include "mesh.h" 10#include "mesh.h"
11 11
12#ifdef CONFIG_MAC80211_VERBOSE_MHWMP_DEBUG
13#define mhwmp_dbg(fmt, args...) printk(KERN_DEBUG "Mesh HWMP: " fmt, ##args)
14#else
15#define mhwmp_dbg(fmt, args...) do { (void)(0); } while (0)
16#endif
17
12#define TEST_FRAME_LEN 8192 18#define TEST_FRAME_LEN 8192
13#define MAX_METRIC 0xffffffff 19#define MAX_METRIC 0xffffffff
14#define ARITH_SHIFT 8 20#define ARITH_SHIFT 8
@@ -21,6 +27,12 @@
21#define MP_F_DO 0x1 27#define MP_F_DO 0x1
22/* Reply and forward */ 28/* Reply and forward */
23#define MP_F_RF 0x2 29#define MP_F_RF 0x2
30/* Unknown Sequence Number */
31#define MP_F_USN 0x01
32/* Reason code Present */
33#define MP_F_RCODE 0x02
34
35static void mesh_queue_preq(struct mesh_path *, u8);
24 36
25static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae) 37static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
26{ 38{
@@ -29,6 +41,13 @@ static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
29 return get_unaligned_le32(preq_elem + offset); 41 return get_unaligned_le32(preq_elem + offset);
30} 42}
31 43
44static inline u32 u16_field_get(u8 *preq_elem, int offset, bool ae)
45{
46 if (ae)
47 offset += 6;
48 return get_unaligned_le16(preq_elem + offset);
49}
50
32/* HWMP IE processing macros */ 51/* HWMP IE processing macros */
33#define AE_F (1<<6) 52#define AE_F (1<<6)
34#define AE_F_SET(x) (*x & AE_F) 53#define AE_F_SET(x) (*x & AE_F)
@@ -37,30 +56,33 @@ static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
37#define PREQ_IE_TTL(x) (*(x + 2)) 56#define PREQ_IE_TTL(x) (*(x + 2))
38#define PREQ_IE_PREQ_ID(x) u32_field_get(x, 3, 0) 57#define PREQ_IE_PREQ_ID(x) u32_field_get(x, 3, 0)
39#define PREQ_IE_ORIG_ADDR(x) (x + 7) 58#define PREQ_IE_ORIG_ADDR(x) (x + 7)
40#define PREQ_IE_ORIG_DSN(x) u32_field_get(x, 13, 0); 59#define PREQ_IE_ORIG_SN(x) u32_field_get(x, 13, 0);
41#define PREQ_IE_LIFETIME(x) u32_field_get(x, 17, AE_F_SET(x)); 60#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)); 61#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)) 62#define PREQ_IE_TARGET_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) 63#define PREQ_IE_TARGET_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)); 64#define PREQ_IE_TARGET_SN(x) u32_field_get(x, 33, AE_F_SET(x));
46 65
47 66
48#define PREP_IE_FLAGS(x) PREQ_IE_FLAGS(x) 67#define PREP_IE_FLAGS(x) PREQ_IE_FLAGS(x)
49#define PREP_IE_HOPCOUNT(x) PREQ_IE_HOPCOUNT(x) 68#define PREP_IE_HOPCOUNT(x) PREQ_IE_HOPCOUNT(x)
50#define PREP_IE_TTL(x) PREQ_IE_TTL(x) 69#define PREP_IE_TTL(x) PREQ_IE_TTL(x)
51#define PREP_IE_ORIG_ADDR(x) (x + 3) 70#define PREP_IE_ORIG_ADDR(x) (x + 3)
52#define PREP_IE_ORIG_DSN(x) u32_field_get(x, 9, 0); 71#define PREP_IE_ORIG_SN(x) u32_field_get(x, 9, 0);
53#define PREP_IE_LIFETIME(x) u32_field_get(x, 13, AE_F_SET(x)); 72#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)); 73#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) 74#define PREP_IE_TARGET_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)); 75#define PREP_IE_TARGET_SN(x) u32_field_get(x, 27, AE_F_SET(x));
57 76
58#define PERR_IE_DST_ADDR(x) (x + 2) 77#define PERR_IE_TTL(x) (*(x))
59#define PERR_IE_DST_DSN(x) u32_field_get(x, 8, 0); 78#define PERR_IE_TARGET_FLAGS(x) (*(x + 2))
79#define PERR_IE_TARGET_ADDR(x) (x + 3)
80#define PERR_IE_TARGET_SN(x) u32_field_get(x, 9, 0);
81#define PERR_IE_TARGET_RCODE(x) u16_field_get(x, 13, 0);
60 82
61#define MSEC_TO_TU(x) (x*1000/1024) 83#define MSEC_TO_TU(x) (x*1000/1024)
62#define DSN_GT(x, y) ((long) (y) - (long) (x) < 0) 84#define SN_GT(x, y) ((long) (y) - (long) (x) < 0)
63#define DSN_LT(x, y) ((long) (x) - (long) (y) < 0) 85#define SN_LT(x, y) ((long) (x) - (long) (y) < 0)
64 86
65#define net_traversal_jiffies(s) \ 87#define net_traversal_jiffies(s) \
66 msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime) 88 msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime)
@@ -75,13 +97,15 @@ static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
75enum mpath_frame_type { 97enum mpath_frame_type {
76 MPATH_PREQ = 0, 98 MPATH_PREQ = 0,
77 MPATH_PREP, 99 MPATH_PREP,
78 MPATH_PERR 100 MPATH_PERR,
101 MPATH_RANN
79}; 102};
80 103
81static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags, 104static 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, 105 u8 *orig_addr, __le32 orig_sn, u8 target_flags, u8 *target,
83 __le32 dst_dsn, u8 *da, u8 hop_count, u8 ttl, __le32 lifetime, 106 __le32 target_sn, u8 *da, u8 hop_count, u8 ttl,__le32 lifetime,
84 __le32 metric, __le32 preq_id, struct ieee80211_sub_if_data *sdata) 107 __le32 metric, __le32 preq_id,
108 struct ieee80211_sub_if_data *sdata)
85{ 109{
86 struct ieee80211_local *local = sdata->local; 110 struct ieee80211_local *local = sdata->local;
87 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); 111 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
@@ -103,21 +127,30 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
103 127
104 memcpy(mgmt->da, da, ETH_ALEN); 128 memcpy(mgmt->da, da, ETH_ALEN);
105 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); 129 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
106 /* BSSID is left zeroed, wildcard value */ 130 /* BSSID == SA */
131 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
107 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY; 132 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
108 mgmt->u.action.u.mesh_action.action_code = action; 133 mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
109 134
110 switch (action) { 135 switch (action) {
111 case MPATH_PREQ: 136 case MPATH_PREQ:
137 mhwmp_dbg("sending PREQ to %pM\n", target);
112 ie_len = 37; 138 ie_len = 37;
113 pos = skb_put(skb, 2 + ie_len); 139 pos = skb_put(skb, 2 + ie_len);
114 *pos++ = WLAN_EID_PREQ; 140 *pos++ = WLAN_EID_PREQ;
115 break; 141 break;
116 case MPATH_PREP: 142 case MPATH_PREP:
143 mhwmp_dbg("sending PREP to %pM\n", target);
117 ie_len = 31; 144 ie_len = 31;
118 pos = skb_put(skb, 2 + ie_len); 145 pos = skb_put(skb, 2 + ie_len);
119 *pos++ = WLAN_EID_PREP; 146 *pos++ = WLAN_EID_PREP;
120 break; 147 break;
148 case MPATH_RANN:
149 mhwmp_dbg("sending RANN from %pM\n", orig_addr);
150 ie_len = sizeof(struct ieee80211_rann_ie);
151 pos = skb_put(skb, 2 + ie_len);
152 *pos++ = WLAN_EID_RANN;
153 break;
121 default: 154 default:
122 kfree_skb(skb); 155 kfree_skb(skb);
123 return -ENOTSUPP; 156 return -ENOTSUPP;
@@ -133,20 +166,24 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
133 } 166 }
134 memcpy(pos, orig_addr, ETH_ALEN); 167 memcpy(pos, orig_addr, ETH_ALEN);
135 pos += ETH_ALEN; 168 pos += ETH_ALEN;
136 memcpy(pos, &orig_dsn, 4); 169 memcpy(pos, &orig_sn, 4);
137 pos += 4;
138 memcpy(pos, &lifetime, 4);
139 pos += 4; 170 pos += 4;
171 if (action != MPATH_RANN) {
172 memcpy(pos, &lifetime, 4);
173 pos += 4;
174 }
140 memcpy(pos, &metric, 4); 175 memcpy(pos, &metric, 4);
141 pos += 4; 176 pos += 4;
142 if (action == MPATH_PREQ) { 177 if (action == MPATH_PREQ) {
143 /* destination count */ 178 /* destination count */
144 *pos++ = 1; 179 *pos++ = 1;
145 *pos++ = dst_flags; 180 *pos++ = target_flags;
181 }
182 if (action != MPATH_RANN) {
183 memcpy(pos, target, ETH_ALEN);
184 pos += ETH_ALEN;
185 memcpy(pos, &target_sn, 4);
146 } 186 }
147 memcpy(pos, dst, ETH_ALEN);
148 pos += ETH_ALEN;
149 memcpy(pos, &dst_dsn, 4);
150 187
151 ieee80211_tx_skb(sdata, skb, 1); 188 ieee80211_tx_skb(sdata, skb, 1);
152 return 0; 189 return 0;
@@ -155,11 +192,13 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
155/** 192/**
156 * mesh_send_path error - Sends a PERR mesh management frame 193 * mesh_send_path error - Sends a PERR mesh management frame
157 * 194 *
158 * @dst: broken destination 195 * @target: broken destination
159 * @dst_dsn: dsn of the broken destination 196 * @target_sn: SN of the broken destination
197 * @target_rcode: reason code for this PERR
160 * @ra: node this frame is addressed to 198 * @ra: node this frame is addressed to
161 */ 199 */
162int mesh_path_error_tx(u8 *dst, __le32 dst_dsn, u8 *ra, 200int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
201 __le16 target_rcode, u8 *ra,
163 struct ieee80211_sub_if_data *sdata) 202 struct ieee80211_sub_if_data *sdata)
164{ 203{
165 struct ieee80211_local *local = sdata->local; 204 struct ieee80211_local *local = sdata->local;
@@ -184,18 +223,30 @@ int mesh_path_error_tx(u8 *dst, __le32 dst_dsn, u8 *ra,
184 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); 223 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
185 /* BSSID is left zeroed, wildcard value */ 224 /* BSSID is left zeroed, wildcard value */
186 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY; 225 mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
187 mgmt->u.action.u.mesh_action.action_code = MPATH_PERR; 226 mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
188 ie_len = 12; 227 ie_len = 15;
189 pos = skb_put(skb, 2 + ie_len); 228 pos = skb_put(skb, 2 + ie_len);
190 *pos++ = WLAN_EID_PERR; 229 *pos++ = WLAN_EID_PERR;
191 *pos++ = ie_len; 230 *pos++ = ie_len;
192 /* mode flags, reserved */ 231 /* ttl */
193 *pos++ = 0; 232 *pos++ = MESH_TTL;
194 /* number of destinations */ 233 /* number of destinations */
195 *pos++ = 1; 234 *pos++ = 1;
196 memcpy(pos, dst, ETH_ALEN); 235 /*
236 * flags bit, bit 1 is unset if we know the sequence number and
237 * bit 2 is set if we have a reason code
238 */
239 *pos = 0;
240 if (!target_sn)
241 *pos |= MP_F_USN;
242 if (target_rcode)
243 *pos |= MP_F_RCODE;
244 pos++;
245 memcpy(pos, target, ETH_ALEN);
197 pos += ETH_ALEN; 246 pos += ETH_ALEN;
198 memcpy(pos, &dst_dsn, 4); 247 memcpy(pos, &target_sn, 4);
248 pos += 4;
249 memcpy(pos, &target_rcode, 2);
199 250
200 ieee80211_tx_skb(sdata, skb, 1); 251 ieee80211_tx_skb(sdata, skb, 1);
201 return 0; 252 return 0;
@@ -269,18 +320,17 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
269 */ 320 */
270static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata, 321static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
271 struct ieee80211_mgmt *mgmt, 322 struct ieee80211_mgmt *mgmt,
272 u8 *hwmp_ie) 323 u8 *hwmp_ie, enum mpath_frame_type action)
273{ 324{
274 struct ieee80211_local *local = sdata->local; 325 struct ieee80211_local *local = sdata->local;
275 struct mesh_path *mpath; 326 struct mesh_path *mpath;
276 struct sta_info *sta; 327 struct sta_info *sta;
277 bool fresh_info; 328 bool fresh_info;
278 u8 *orig_addr, *ta; 329 u8 *orig_addr, *ta;
279 u32 orig_dsn, orig_metric; 330 u32 orig_sn, orig_metric;
280 unsigned long orig_lifetime, exp_time; 331 unsigned long orig_lifetime, exp_time;
281 u32 last_hop_metric, new_metric; 332 u32 last_hop_metric, new_metric;
282 bool process = true; 333 bool process = true;
283 u8 action = mgmt->u.action.u.mesh_action.action_code;
284 334
285 rcu_read_lock(); 335 rcu_read_lock();
286 sta = sta_info_get(local, mgmt->sa); 336 sta = sta_info_get(local, mgmt->sa);
@@ -296,7 +346,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
296 switch (action) { 346 switch (action) {
297 case MPATH_PREQ: 347 case MPATH_PREQ:
298 orig_addr = PREQ_IE_ORIG_ADDR(hwmp_ie); 348 orig_addr = PREQ_IE_ORIG_ADDR(hwmp_ie);
299 orig_dsn = PREQ_IE_ORIG_DSN(hwmp_ie); 349 orig_sn = PREQ_IE_ORIG_SN(hwmp_ie);
300 orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie); 350 orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie);
301 orig_metric = PREQ_IE_METRIC(hwmp_ie); 351 orig_metric = PREQ_IE_METRIC(hwmp_ie);
302 break; 352 break;
@@ -309,7 +359,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
309 * information from both PREQ and PREP frames. 359 * information from both PREQ and PREP frames.
310 */ 360 */
311 orig_addr = PREP_IE_ORIG_ADDR(hwmp_ie); 361 orig_addr = PREP_IE_ORIG_ADDR(hwmp_ie);
312 orig_dsn = PREP_IE_ORIG_DSN(hwmp_ie); 362 orig_sn = PREP_IE_ORIG_SN(hwmp_ie);
313 orig_lifetime = PREP_IE_LIFETIME(hwmp_ie); 363 orig_lifetime = PREP_IE_LIFETIME(hwmp_ie);
314 orig_metric = PREP_IE_METRIC(hwmp_ie); 364 orig_metric = PREP_IE_METRIC(hwmp_ie);
315 break; 365 break;
@@ -335,9 +385,9 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
335 if (mpath->flags & MESH_PATH_FIXED) 385 if (mpath->flags & MESH_PATH_FIXED)
336 fresh_info = false; 386 fresh_info = false;
337 else if ((mpath->flags & MESH_PATH_ACTIVE) && 387 else if ((mpath->flags & MESH_PATH_ACTIVE) &&
338 (mpath->flags & MESH_PATH_DSN_VALID)) { 388 (mpath->flags & MESH_PATH_SN_VALID)) {
339 if (DSN_GT(mpath->dsn, orig_dsn) || 389 if (SN_GT(mpath->sn, orig_sn) ||
340 (mpath->dsn == orig_dsn && 390 (mpath->sn == orig_sn &&
341 action == MPATH_PREQ && 391 action == MPATH_PREQ &&
342 new_metric > mpath->metric)) { 392 new_metric > mpath->metric)) {
343 process = false; 393 process = false;
@@ -356,9 +406,9 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
356 406
357 if (fresh_info) { 407 if (fresh_info) {
358 mesh_path_assign_nexthop(mpath, sta); 408 mesh_path_assign_nexthop(mpath, sta);
359 mpath->flags |= MESH_PATH_DSN_VALID; 409 mpath->flags |= MESH_PATH_SN_VALID;
360 mpath->metric = new_metric; 410 mpath->metric = new_metric;
361 mpath->dsn = orig_dsn; 411 mpath->sn = orig_sn;
362 mpath->exp_time = time_after(mpath->exp_time, exp_time) 412 mpath->exp_time = time_after(mpath->exp_time, exp_time)
363 ? mpath->exp_time : exp_time; 413 ? mpath->exp_time : exp_time;
364 mesh_path_activate(mpath); 414 mesh_path_activate(mpath);
@@ -397,7 +447,7 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
397 447
398 if (fresh_info) { 448 if (fresh_info) {
399 mesh_path_assign_nexthop(mpath, sta); 449 mesh_path_assign_nexthop(mpath, sta);
400 mpath->flags &= ~MESH_PATH_DSN_VALID; 450 mpath->flags &= ~MESH_PATH_SN_VALID;
401 mpath->metric = last_hop_metric; 451 mpath->metric = last_hop_metric;
402 mpath->exp_time = time_after(mpath->exp_time, exp_time) 452 mpath->exp_time = time_after(mpath->exp_time, exp_time)
403 ? mpath->exp_time : exp_time; 453 ? mpath->exp_time : exp_time;
@@ -419,44 +469,47 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
419{ 469{
420 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 470 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
421 struct mesh_path *mpath; 471 struct mesh_path *mpath;
422 u8 *dst_addr, *orig_addr; 472 u8 *target_addr, *orig_addr;
423 u8 dst_flags, ttl; 473 u8 target_flags, ttl;
424 u32 orig_dsn, dst_dsn, lifetime; 474 u32 orig_sn, target_sn, lifetime;
425 bool reply = false; 475 bool reply = false;
426 bool forward = true; 476 bool forward = true;
427 477
428 /* Update destination DSN, if present */ 478 /* Update target SN, if present */
429 dst_addr = PREQ_IE_DST_ADDR(preq_elem); 479 target_addr = PREQ_IE_TARGET_ADDR(preq_elem);
430 orig_addr = PREQ_IE_ORIG_ADDR(preq_elem); 480 orig_addr = PREQ_IE_ORIG_ADDR(preq_elem);
431 dst_dsn = PREQ_IE_DST_DSN(preq_elem); 481 target_sn = PREQ_IE_TARGET_SN(preq_elem);
432 orig_dsn = PREQ_IE_ORIG_DSN(preq_elem); 482 orig_sn = PREQ_IE_ORIG_SN(preq_elem);
433 dst_flags = PREQ_IE_DST_F(preq_elem); 483 target_flags = PREQ_IE_TARGET_F(preq_elem);
434 484
435 if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) { 485 mhwmp_dbg("received PREQ from %pM\n", orig_addr);
486
487 if (memcmp(target_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) {
488 mhwmp_dbg("PREQ is for us\n");
436 forward = false; 489 forward = false;
437 reply = true; 490 reply = true;
438 metric = 0; 491 metric = 0;
439 if (time_after(jiffies, ifmsh->last_dsn_update + 492 if (time_after(jiffies, ifmsh->last_sn_update +
440 net_traversal_jiffies(sdata)) || 493 net_traversal_jiffies(sdata)) ||
441 time_before(jiffies, ifmsh->last_dsn_update)) { 494 time_before(jiffies, ifmsh->last_sn_update)) {
442 dst_dsn = ++ifmsh->dsn; 495 target_sn = ++ifmsh->sn;
443 ifmsh->last_dsn_update = jiffies; 496 ifmsh->last_sn_update = jiffies;
444 } 497 }
445 } else { 498 } else {
446 rcu_read_lock(); 499 rcu_read_lock();
447 mpath = mesh_path_lookup(dst_addr, sdata); 500 mpath = mesh_path_lookup(target_addr, sdata);
448 if (mpath) { 501 if (mpath) {
449 if ((!(mpath->flags & MESH_PATH_DSN_VALID)) || 502 if ((!(mpath->flags & MESH_PATH_SN_VALID)) ||
450 DSN_LT(mpath->dsn, dst_dsn)) { 503 SN_LT(mpath->sn, target_sn)) {
451 mpath->dsn = dst_dsn; 504 mpath->sn = target_sn;
452 mpath->flags |= MESH_PATH_DSN_VALID; 505 mpath->flags |= MESH_PATH_SN_VALID;
453 } else if ((!(dst_flags & MP_F_DO)) && 506 } else if ((!(target_flags & MP_F_DO)) &&
454 (mpath->flags & MESH_PATH_ACTIVE)) { 507 (mpath->flags & MESH_PATH_ACTIVE)) {
455 reply = true; 508 reply = true;
456 metric = mpath->metric; 509 metric = mpath->metric;
457 dst_dsn = mpath->dsn; 510 target_sn = mpath->sn;
458 if (dst_flags & MP_F_RF) 511 if (target_flags & MP_F_RF)
459 dst_flags |= MP_F_DO; 512 target_flags |= MP_F_DO;
460 else 513 else
461 forward = false; 514 forward = false;
462 } 515 }
@@ -467,13 +520,14 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
467 if (reply) { 520 if (reply) {
468 lifetime = PREQ_IE_LIFETIME(preq_elem); 521 lifetime = PREQ_IE_LIFETIME(preq_elem);
469 ttl = ifmsh->mshcfg.dot11MeshTTL; 522 ttl = ifmsh->mshcfg.dot11MeshTTL;
470 if (ttl != 0) 523 if (ttl != 0) {
471 mesh_path_sel_frame_tx(MPATH_PREP, 0, dst_addr, 524 mhwmp_dbg("replying to the PREQ\n");
472 cpu_to_le32(dst_dsn), 0, orig_addr, 525 mesh_path_sel_frame_tx(MPATH_PREP, 0, target_addr,
473 cpu_to_le32(orig_dsn), mgmt->sa, 0, ttl, 526 cpu_to_le32(target_sn), 0, orig_addr,
527 cpu_to_le32(orig_sn), mgmt->sa, 0, ttl,
474 cpu_to_le32(lifetime), cpu_to_le32(metric), 528 cpu_to_le32(lifetime), cpu_to_le32(metric),
475 0, sdata); 529 0, sdata);
476 else 530 } else
477 ifmsh->mshstats.dropped_frames_ttl++; 531 ifmsh->mshstats.dropped_frames_ttl++;
478 } 532 }
479 533
@@ -487,13 +541,14 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
487 ifmsh->mshstats.dropped_frames_ttl++; 541 ifmsh->mshstats.dropped_frames_ttl++;
488 return; 542 return;
489 } 543 }
544 mhwmp_dbg("forwarding the PREQ from %pM\n", orig_addr);
490 --ttl; 545 --ttl;
491 flags = PREQ_IE_FLAGS(preq_elem); 546 flags = PREQ_IE_FLAGS(preq_elem);
492 preq_id = PREQ_IE_PREQ_ID(preq_elem); 547 preq_id = PREQ_IE_PREQ_ID(preq_elem);
493 hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1; 548 hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1;
494 mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr, 549 mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr,
495 cpu_to_le32(orig_dsn), dst_flags, dst_addr, 550 cpu_to_le32(orig_sn), target_flags, target_addr,
496 cpu_to_le32(dst_dsn), sdata->dev->broadcast, 551 cpu_to_le32(target_sn), sdata->dev->broadcast,
497 hopcount, ttl, cpu_to_le32(lifetime), 552 hopcount, ttl, cpu_to_le32(lifetime),
498 cpu_to_le32(metric), cpu_to_le32(preq_id), 553 cpu_to_le32(metric), cpu_to_le32(preq_id),
499 sdata); 554 sdata);
@@ -508,10 +563,12 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
508 u8 *prep_elem, u32 metric) 563 u8 *prep_elem, u32 metric)
509{ 564{
510 struct mesh_path *mpath; 565 struct mesh_path *mpath;
511 u8 *dst_addr, *orig_addr; 566 u8 *target_addr, *orig_addr;
512 u8 ttl, hopcount, flags; 567 u8 ttl, hopcount, flags;
513 u8 next_hop[ETH_ALEN]; 568 u8 next_hop[ETH_ALEN];
514 u32 dst_dsn, orig_dsn, lifetime; 569 u32 target_sn, orig_sn, lifetime;
570
571 mhwmp_dbg("received PREP from %pM\n", PREP_IE_ORIG_ADDR(prep_elem));
515 572
516 /* Note that we divert from the draft nomenclature and denominate 573 /* Note that we divert from the draft nomenclature and denominate
517 * destination to what the draft refers to as origininator. So in this 574 * destination to what the draft refers to as origininator. So in this
@@ -519,8 +576,8 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
519 * which corresponds with the originator of the PREQ which this PREP 576 * which corresponds with the originator of the PREQ which this PREP
520 * replies 577 * replies
521 */ 578 */
522 dst_addr = PREP_IE_DST_ADDR(prep_elem); 579 target_addr = PREP_IE_TARGET_ADDR(prep_elem);
523 if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) 580 if (memcmp(target_addr, sdata->dev->dev_addr, ETH_ALEN) == 0)
524 /* destination, no forwarding required */ 581 /* destination, no forwarding required */
525 return; 582 return;
526 583
@@ -531,7 +588,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
531 } 588 }
532 589
533 rcu_read_lock(); 590 rcu_read_lock();
534 mpath = mesh_path_lookup(dst_addr, sdata); 591 mpath = mesh_path_lookup(target_addr, sdata);
535 if (mpath) 592 if (mpath)
536 spin_lock_bh(&mpath->state_lock); 593 spin_lock_bh(&mpath->state_lock);
537 else 594 else
@@ -547,13 +604,13 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
547 lifetime = PREP_IE_LIFETIME(prep_elem); 604 lifetime = PREP_IE_LIFETIME(prep_elem);
548 hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1; 605 hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1;
549 orig_addr = PREP_IE_ORIG_ADDR(prep_elem); 606 orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
550 dst_dsn = PREP_IE_DST_DSN(prep_elem); 607 target_sn = PREP_IE_TARGET_SN(prep_elem);
551 orig_dsn = PREP_IE_ORIG_DSN(prep_elem); 608 orig_sn = PREP_IE_ORIG_SN(prep_elem);
552 609
553 mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr, 610 mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr,
554 cpu_to_le32(orig_dsn), 0, dst_addr, 611 cpu_to_le32(orig_sn), 0, target_addr,
555 cpu_to_le32(dst_dsn), mpath->next_hop->sta.addr, hopcount, ttl, 612 cpu_to_le32(target_sn), mpath->next_hop->sta.addr, hopcount,
556 cpu_to_le32(lifetime), cpu_to_le32(metric), 613 ttl, cpu_to_le32(lifetime), cpu_to_le32(metric),
557 0, sdata); 614 0, sdata);
558 rcu_read_unlock(); 615 rcu_read_unlock();
559 616
@@ -570,25 +627,39 @@ fail:
570static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata, 627static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
571 struct ieee80211_mgmt *mgmt, u8 *perr_elem) 628 struct ieee80211_mgmt *mgmt, u8 *perr_elem)
572{ 629{
630 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
573 struct mesh_path *mpath; 631 struct mesh_path *mpath;
574 u8 *ta, *dst_addr; 632 u8 ttl;
575 u32 dst_dsn; 633 u8 *ta, *target_addr;
634 u8 target_flags;
635 u32 target_sn;
636 u16 target_rcode;
576 637
577 ta = mgmt->sa; 638 ta = mgmt->sa;
578 dst_addr = PERR_IE_DST_ADDR(perr_elem); 639 ttl = PERR_IE_TTL(perr_elem);
579 dst_dsn = PERR_IE_DST_DSN(perr_elem); 640 if (ttl <= 1) {
641 ifmsh->mshstats.dropped_frames_ttl++;
642 return;
643 }
644 ttl--;
645 target_flags = PERR_IE_TARGET_FLAGS(perr_elem);
646 target_addr = PERR_IE_TARGET_ADDR(perr_elem);
647 target_sn = PERR_IE_TARGET_SN(perr_elem);
648 target_rcode = PERR_IE_TARGET_RCODE(perr_elem);
649
580 rcu_read_lock(); 650 rcu_read_lock();
581 mpath = mesh_path_lookup(dst_addr, sdata); 651 mpath = mesh_path_lookup(target_addr, sdata);
582 if (mpath) { 652 if (mpath) {
583 spin_lock_bh(&mpath->state_lock); 653 spin_lock_bh(&mpath->state_lock);
584 if (mpath->flags & MESH_PATH_ACTIVE && 654 if (mpath->flags & MESH_PATH_ACTIVE &&
585 memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 && 655 memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 &&
586 (!(mpath->flags & MESH_PATH_DSN_VALID) || 656 (!(mpath->flags & MESH_PATH_SN_VALID) ||
587 DSN_GT(dst_dsn, mpath->dsn))) { 657 SN_GT(target_sn, mpath->sn))) {
588 mpath->flags &= ~MESH_PATH_ACTIVE; 658 mpath->flags &= ~MESH_PATH_ACTIVE;
589 mpath->dsn = dst_dsn; 659 mpath->sn = target_sn;
590 spin_unlock_bh(&mpath->state_lock); 660 spin_unlock_bh(&mpath->state_lock);
591 mesh_path_error_tx(dst_addr, cpu_to_le32(dst_dsn), 661 mesh_path_error_tx(ttl, target_addr, cpu_to_le32(target_sn),
662 cpu_to_le16(target_rcode),
592 sdata->dev->broadcast, sdata); 663 sdata->dev->broadcast, sdata);
593 } else 664 } else
594 spin_unlock_bh(&mpath->state_lock); 665 spin_unlock_bh(&mpath->state_lock);
@@ -596,6 +667,56 @@ static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
596 rcu_read_unlock(); 667 rcu_read_unlock();
597} 668}
598 669
670static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
671 struct ieee80211_mgmt *mgmt,
672 struct ieee80211_rann_ie *rann)
673{
674 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
675 struct mesh_path *mpath;
676 u8 *ta;
677 u8 ttl, flags, hopcount;
678 u8 *orig_addr;
679 u32 orig_sn, metric;
680
681 ta = mgmt->sa;
682 ttl = rann->rann_ttl;
683 if (ttl <= 1) {
684 ifmsh->mshstats.dropped_frames_ttl++;
685 return;
686 }
687 ttl--;
688 flags = rann->rann_flags;
689 orig_addr = rann->rann_addr;
690 orig_sn = rann->rann_seq;
691 hopcount = rann->rann_hopcount;
692 hopcount++;
693 metric = rann->rann_metric;
694 mhwmp_dbg("received RANN from %pM\n", orig_addr);
695
696 rcu_read_lock();
697 mpath = mesh_path_lookup(orig_addr, sdata);
698 if (!mpath) {
699 mesh_path_add(orig_addr, sdata);
700 mpath = mesh_path_lookup(orig_addr, sdata);
701 if (!mpath) {
702 rcu_read_unlock();
703 sdata->u.mesh.mshstats.dropped_frames_no_route++;
704 return;
705 }
706 mesh_queue_preq(mpath,
707 PREQ_Q_F_START | PREQ_Q_F_REFRESH);
708 }
709 if (mpath->sn < orig_sn) {
710 mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr,
711 cpu_to_le32(orig_sn),
712 0, NULL, 0, sdata->dev->broadcast,
713 hopcount, ttl, 0,
714 cpu_to_le32(metric + mpath->metric),
715 0, sdata);
716 mpath->sn = orig_sn;
717 }
718 rcu_read_unlock();
719}
599 720
600 721
601void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata, 722void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
@@ -614,34 +735,34 @@ void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
614 ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable, 735 ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable,
615 len - baselen, &elems); 736 len - baselen, &elems);
616 737
617 switch (mgmt->u.action.u.mesh_action.action_code) { 738 if (elems.preq) {
618 case MPATH_PREQ: 739 if (elems.preq_len != 37)
619 if (!elems.preq || elems.preq_len != 37)
620 /* Right now we support just 1 destination and no AE */ 740 /* Right now we support just 1 destination and no AE */
621 return; 741 return;
622 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq); 742 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq,
623 if (!last_hop_metric) 743 MPATH_PREQ);
624 return; 744 if (last_hop_metric)
625 hwmp_preq_frame_process(sdata, mgmt, elems.preq, last_hop_metric); 745 hwmp_preq_frame_process(sdata, mgmt, elems.preq,
626 break; 746 last_hop_metric);
627 case MPATH_PREP: 747 }
628 if (!elems.prep || elems.prep_len != 31) 748 if (elems.prep) {
749 if (elems.prep_len != 31)
629 /* Right now we support no AE */ 750 /* Right now we support no AE */
630 return; 751 return;
631 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep); 752 last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep,
632 if (!last_hop_metric) 753 MPATH_PREP);
633 return; 754 if (last_hop_metric)
634 hwmp_prep_frame_process(sdata, mgmt, elems.prep, last_hop_metric); 755 hwmp_prep_frame_process(sdata, mgmt, elems.prep,
635 break; 756 last_hop_metric);
636 case MPATH_PERR: 757 }
637 if (!elems.perr || elems.perr_len != 12) 758 if (elems.perr) {
759 if (elems.perr_len != 15)
638 /* Right now we support only one destination per PERR */ 760 /* Right now we support only one destination per PERR */
639 return; 761 return;
640 hwmp_perr_frame_process(sdata, mgmt, elems.perr); 762 hwmp_perr_frame_process(sdata, mgmt, elems.perr);
641 default:
642 return;
643 } 763 }
644 764 if (elems.rann)
765 hwmp_rann_frame_process(sdata, mgmt, elems.rann);
645} 766}
646 767
647/** 768/**
@@ -661,7 +782,7 @@ static void mesh_queue_preq(struct mesh_path *mpath, u8 flags)
661 782
662 preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC); 783 preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC);
663 if (!preq_node) { 784 if (!preq_node) {
664 printk(KERN_DEBUG "Mesh HWMP: could not allocate PREQ node\n"); 785 mhwmp_dbg("could not allocate PREQ node\n");
665 return; 786 return;
666 } 787 }
667 788
@@ -670,7 +791,7 @@ static void mesh_queue_preq(struct mesh_path *mpath, u8 flags)
670 spin_unlock(&ifmsh->mesh_preq_queue_lock); 791 spin_unlock(&ifmsh->mesh_preq_queue_lock);
671 kfree(preq_node); 792 kfree(preq_node);
672 if (printk_ratelimit()) 793 if (printk_ratelimit())
673 printk(KERN_DEBUG "Mesh HWMP: PREQ node queue full\n"); 794 mhwmp_dbg("PREQ node queue full\n");
674 return; 795 return;
675 } 796 }
676 797
@@ -705,7 +826,7 @@ void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
705 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 826 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
706 struct mesh_preq_queue *preq_node; 827 struct mesh_preq_queue *preq_node;
707 struct mesh_path *mpath; 828 struct mesh_path *mpath;
708 u8 ttl, dst_flags; 829 u8 ttl, target_flags;
709 u32 lifetime; 830 u32 lifetime;
710 831
711 spin_lock_bh(&ifmsh->mesh_preq_queue_lock); 832 spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
@@ -747,11 +868,11 @@ void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
747 868
748 ifmsh->last_preq = jiffies; 869 ifmsh->last_preq = jiffies;
749 870
750 if (time_after(jiffies, ifmsh->last_dsn_update + 871 if (time_after(jiffies, ifmsh->last_sn_update +
751 net_traversal_jiffies(sdata)) || 872 net_traversal_jiffies(sdata)) ||
752 time_before(jiffies, ifmsh->last_dsn_update)) { 873 time_before(jiffies, ifmsh->last_sn_update)) {
753 ++ifmsh->dsn; 874 ++ifmsh->sn;
754 sdata->u.mesh.last_dsn_update = jiffies; 875 sdata->u.mesh.last_sn_update = jiffies;
755 } 876 }
756 lifetime = default_lifetime(sdata); 877 lifetime = default_lifetime(sdata);
757 ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 878 ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
@@ -762,14 +883,14 @@ void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
762 } 883 }
763 884
764 if (preq_node->flags & PREQ_Q_F_REFRESH) 885 if (preq_node->flags & PREQ_Q_F_REFRESH)
765 dst_flags = MP_F_DO; 886 target_flags = MP_F_DO;
766 else 887 else
767 dst_flags = MP_F_RF; 888 target_flags = MP_F_RF;
768 889
769 spin_unlock_bh(&mpath->state_lock); 890 spin_unlock_bh(&mpath->state_lock);
770 mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr, 891 mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr,
771 cpu_to_le32(ifmsh->dsn), dst_flags, mpath->dst, 892 cpu_to_le32(ifmsh->sn), target_flags, mpath->dst,
772 cpu_to_le32(mpath->dsn), sdata->dev->broadcast, 0, 893 cpu_to_le32(mpath->sn), sdata->dev->broadcast, 0,
773 ttl, cpu_to_le32(lifetime), 0, 894 ttl, cpu_to_le32(lifetime), 0,
774 cpu_to_le32(ifmsh->preq_id++), sdata); 895 cpu_to_le32(ifmsh->preq_id++), sdata);
775 mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout); 896 mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);
@@ -796,15 +917,15 @@ int mesh_nexthop_lookup(struct sk_buff *skb,
796 struct sk_buff *skb_to_free = NULL; 917 struct sk_buff *skb_to_free = NULL;
797 struct mesh_path *mpath; 918 struct mesh_path *mpath;
798 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 919 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
799 u8 *dst_addr = hdr->addr3; 920 u8 *target_addr = hdr->addr3;
800 int err = 0; 921 int err = 0;
801 922
802 rcu_read_lock(); 923 rcu_read_lock();
803 mpath = mesh_path_lookup(dst_addr, sdata); 924 mpath = mesh_path_lookup(target_addr, sdata);
804 925
805 if (!mpath) { 926 if (!mpath) {
806 mesh_path_add(dst_addr, sdata); 927 mesh_path_add(target_addr, sdata);
807 mpath = mesh_path_lookup(dst_addr, sdata); 928 mpath = mesh_path_lookup(target_addr, sdata);
808 if (!mpath) { 929 if (!mpath) {
809 sdata->u.mesh.mshstats.dropped_frames_no_route++; 930 sdata->u.mesh.mshstats.dropped_frames_no_route++;
810 err = -ENOSPC; 931 err = -ENOSPC;
@@ -882,3 +1003,14 @@ void mesh_path_timer(unsigned long data)
882endmpathtimer: 1003endmpathtimer:
883 rcu_read_unlock(); 1004 rcu_read_unlock();
884} 1005}
1006
1007void
1008mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
1009{
1010 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1011
1012 mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->dev->dev_addr,
1013 cpu_to_le32(++ifmsh->sn),
1014 0, NULL, 0, sdata->dev->broadcast,
1015 0, MESH_TTL, 0, 0, 0, sdata);
1016}
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-24 11:15:09 -0500