/*
- * Copyright (c) 2008 open80211s Ltd.
+ * Copyright (c) 2008, 2009 open80211s Ltd.
* Author: Luis Carlos Cobo <luisca@cozybit.com>
*
* This program is free software; you can redistribute it and/or modify
#include "mesh.h"
+#ifdef CONFIG_MAC80211_VERBOSE_MHWMP_DEBUG
+#define mhwmp_dbg(fmt, args...) printk(KERN_DEBUG "Mesh HWMP: " fmt, ##args)
+#else
+#define mhwmp_dbg(fmt, args...) do { (void)(0); } while (0)
+#endif
+
#define TEST_FRAME_LEN 8192
#define MAX_METRIC 0xffffffff
#define ARITH_SHIFT 8
#define MP_F_DO 0x1
/* Reply and forward */
#define MP_F_RF 0x2
+/* Unknown Sequence Number */
+#define MP_F_USN 0x01
+/* Reason code Present */
+#define MP_F_RCODE 0x02
+
+static void mesh_queue_preq(struct mesh_path *, u8);
static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
{
return get_unaligned_le32(preq_elem + offset);
}
+static inline u32 u16_field_get(u8 *preq_elem, int offset, bool ae)
+{
+ if (ae)
+ offset += 6;
+ return get_unaligned_le16(preq_elem + offset);
+}
+
/* HWMP IE processing macros */
#define AE_F (1<<6)
#define AE_F_SET(x) (*x & AE_F)
#define PREQ_IE_TTL(x) (*(x + 2))
#define PREQ_IE_PREQ_ID(x) u32_field_get(x, 3, 0)
#define PREQ_IE_ORIG_ADDR(x) (x + 7)
-#define PREQ_IE_ORIG_DSN(x) u32_field_get(x, 13, 0);
+#define PREQ_IE_ORIG_SN(x) u32_field_get(x, 13, 0);
#define PREQ_IE_LIFETIME(x) u32_field_get(x, 17, AE_F_SET(x));
#define PREQ_IE_METRIC(x) u32_field_get(x, 21, AE_F_SET(x));
-#define PREQ_IE_DST_F(x) (*(AE_F_SET(x) ? x + 32 : x + 26))
-#define PREQ_IE_DST_ADDR(x) (AE_F_SET(x) ? x + 33 : x + 27)
-#define PREQ_IE_DST_DSN(x) u32_field_get(x, 33, AE_F_SET(x));
+#define PREQ_IE_TARGET_F(x) (*(AE_F_SET(x) ? x + 32 : x + 26))
+#define PREQ_IE_TARGET_ADDR(x) (AE_F_SET(x) ? x + 33 : x + 27)
+#define PREQ_IE_TARGET_SN(x) u32_field_get(x, 33, AE_F_SET(x));
#define PREP_IE_FLAGS(x) PREQ_IE_FLAGS(x)
#define PREP_IE_HOPCOUNT(x) PREQ_IE_HOPCOUNT(x)
#define PREP_IE_TTL(x) PREQ_IE_TTL(x)
#define PREP_IE_ORIG_ADDR(x) (x + 3)
-#define PREP_IE_ORIG_DSN(x) u32_field_get(x, 9, 0);
+#define PREP_IE_ORIG_SN(x) u32_field_get(x, 9, 0);
#define PREP_IE_LIFETIME(x) u32_field_get(x, 13, AE_F_SET(x));
#define PREP_IE_METRIC(x) u32_field_get(x, 17, AE_F_SET(x));
-#define PREP_IE_DST_ADDR(x) (AE_F_SET(x) ? x + 27 : x + 21)
-#define PREP_IE_DST_DSN(x) u32_field_get(x, 27, AE_F_SET(x));
+#define PREP_IE_TARGET_ADDR(x) (AE_F_SET(x) ? x + 27 : x + 21)
+#define PREP_IE_TARGET_SN(x) u32_field_get(x, 27, AE_F_SET(x));
-#define PERR_IE_DST_ADDR(x) (x + 2)
-#define PERR_IE_DST_DSN(x) u32_field_get(x, 8, 0);
+#define PERR_IE_TTL(x) (*(x))
+#define PERR_IE_TARGET_FLAGS(x) (*(x + 2))
+#define PERR_IE_TARGET_ADDR(x) (x + 3)
+#define PERR_IE_TARGET_SN(x) u32_field_get(x, 9, 0);
+#define PERR_IE_TARGET_RCODE(x) u16_field_get(x, 13, 0);
-#define TU_TO_EXP_TIME(x) (jiffies + msecs_to_jiffies(x * 1024 / 1000))
#define MSEC_TO_TU(x) (x*1000/1024)
-#define DSN_GT(x, y) ((long) (y) - (long) (x) < 0)
-#define DSN_LT(x, y) ((long) (x) - (long) (y) < 0)
+#define SN_GT(x, y) ((long) (y) - (long) (x) < 0)
+#define SN_LT(x, y) ((long) (x) - (long) (y) < 0)
#define net_traversal_jiffies(s) \
msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime)
enum mpath_frame_type {
MPATH_PREQ = 0,
MPATH_PREP,
- MPATH_PERR
+ MPATH_PERR,
+ MPATH_RANN
};
+static const u8 broadcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+
static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
- u8 *orig_addr, __le32 orig_dsn, u8 dst_flags, u8 *dst,
- __le32 dst_dsn, u8 *da, u8 hop_count, u8 ttl, __le32 lifetime,
- __le32 metric, __le32 preq_id, struct ieee80211_sub_if_data *sdata)
+ u8 *orig_addr, __le32 orig_sn, u8 target_flags, u8 *target,
+ __le32 target_sn, const u8 *da, u8 hop_count, u8 ttl,
+ __le32 lifetime, __le32 metric, __le32 preq_id,
+ struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
IEEE80211_STYPE_ACTION);
memcpy(mgmt->da, da, ETH_ALEN);
- memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
- /* BSSID is left zeroed, wildcard value */
+ memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+ /* BSSID == SA */
+ memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
- mgmt->u.action.u.mesh_action.action_code = action;
+ mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
switch (action) {
case MPATH_PREQ:
+ mhwmp_dbg("sending PREQ to %pM\n", target);
ie_len = 37;
pos = skb_put(skb, 2 + ie_len);
*pos++ = WLAN_EID_PREQ;
break;
case MPATH_PREP:
+ mhwmp_dbg("sending PREP to %pM\n", target);
ie_len = 31;
pos = skb_put(skb, 2 + ie_len);
*pos++ = WLAN_EID_PREP;
break;
+ case MPATH_RANN:
+ mhwmp_dbg("sending RANN from %pM\n", orig_addr);
+ ie_len = sizeof(struct ieee80211_rann_ie);
+ pos = skb_put(skb, 2 + ie_len);
+ *pos++ = WLAN_EID_RANN;
+ break;
default:
kfree_skb(skb);
return -ENOTSUPP;
}
memcpy(pos, orig_addr, ETH_ALEN);
pos += ETH_ALEN;
- memcpy(pos, &orig_dsn, 4);
- pos += 4;
- memcpy(pos, &lifetime, 4);
+ memcpy(pos, &orig_sn, 4);
pos += 4;
+ if (action != MPATH_RANN) {
+ memcpy(pos, &lifetime, 4);
+ pos += 4;
+ }
memcpy(pos, &metric, 4);
pos += 4;
if (action == MPATH_PREQ) {
/* destination count */
*pos++ = 1;
- *pos++ = dst_flags;
+ *pos++ = target_flags;
+ }
+ if (action != MPATH_RANN) {
+ memcpy(pos, target, ETH_ALEN);
+ pos += ETH_ALEN;
+ memcpy(pos, &target_sn, 4);
}
- memcpy(pos, dst, ETH_ALEN);
- pos += ETH_ALEN;
- memcpy(pos, &dst_dsn, 4);
- ieee80211_tx_skb(sdata, skb, 0);
+ ieee80211_tx_skb(sdata, skb);
return 0;
}
/**
* mesh_send_path error - Sends a PERR mesh management frame
*
- * @dst: broken destination
- * @dst_dsn: dsn of the broken destination
+ * @target: broken destination
+ * @target_sn: SN of the broken destination
+ * @target_rcode: reason code for this PERR
* @ra: node this frame is addressed to
*/
-int mesh_path_error_tx(u8 *dst, __le32 dst_dsn, u8 *ra,
- struct ieee80211_sub_if_data *sdata)
+int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
+ __le16 target_rcode, const u8 *ra,
+ struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
IEEE80211_STYPE_ACTION);
memcpy(mgmt->da, ra, ETH_ALEN);
- memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
+ memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
/* BSSID is left zeroed, wildcard value */
mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
- mgmt->u.action.u.mesh_action.action_code = MPATH_PERR;
- ie_len = 12;
+ mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
+ ie_len = 15;
pos = skb_put(skb, 2 + ie_len);
*pos++ = WLAN_EID_PERR;
*pos++ = ie_len;
- /* mode flags, reserved */
- *pos++ = 0;
+ /* ttl */
+ *pos++ = MESH_TTL;
/* number of destinations */
*pos++ = 1;
- memcpy(pos, dst, ETH_ALEN);
+ /*
+ * flags bit, bit 1 is unset if we know the sequence number and
+ * bit 2 is set if we have a reason code
+ */
+ *pos = 0;
+ if (!target_sn)
+ *pos |= MP_F_USN;
+ if (target_rcode)
+ *pos |= MP_F_RCODE;
+ pos++;
+ memcpy(pos, target, ETH_ALEN);
pos += ETH_ALEN;
- memcpy(pos, &dst_dsn, 4);
+ memcpy(pos, &target_sn, 4);
+ pos += 4;
+ memcpy(pos, &target_rcode, 2);
- ieee80211_tx_skb(sdata, skb, 0);
+ ieee80211_tx_skb(sdata, skb);
return 0;
}
+void ieee80211s_update_metric(struct ieee80211_local *local,
+ struct sta_info *stainfo, struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ int failed;
+
+ if (!ieee80211_is_data(hdr->frame_control))
+ return;
+
+ failed = !(txinfo->flags & IEEE80211_TX_STAT_ACK);
+
+ /* moving average, scaled to 100 */
+ stainfo->fail_avg = ((80 * stainfo->fail_avg + 5) / 100 + 20 * failed);
+ if (stainfo->fail_avg > 95)
+ mesh_plink_broken(stainfo);
+}
+
static u32 airtime_link_metric_get(struct ieee80211_local *local,
struct sta_info *sta)
{
* @hwmp_ie: hwmp information element (PREP or PREQ)
*
* This function updates the path routing information to the originator and the
- * transmitter of a HWMP PREQ or PREP fram.
+ * transmitter of a HWMP PREQ or PREP frame.
*
* Returns: metric to frame originator or 0 if the frame should not be further
* processed
*/
static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt,
- u8 *hwmp_ie)
+ u8 *hwmp_ie, enum mpath_frame_type action)
{
struct ieee80211_local *local = sdata->local;
struct mesh_path *mpath;
struct sta_info *sta;
bool fresh_info;
u8 *orig_addr, *ta;
- u32 orig_dsn, orig_metric;
+ u32 orig_sn, orig_metric;
unsigned long orig_lifetime, exp_time;
u32 last_hop_metric, new_metric;
bool process = true;
- u8 action = mgmt->u.action.u.mesh_action.action_code;
rcu_read_lock();
- sta = sta_info_get(local, mgmt->sa);
+ sta = sta_info_get(sdata, mgmt->sa);
if (!sta) {
rcu_read_unlock();
return 0;
switch (action) {
case MPATH_PREQ:
orig_addr = PREQ_IE_ORIG_ADDR(hwmp_ie);
- orig_dsn = PREQ_IE_ORIG_DSN(hwmp_ie);
+ orig_sn = PREQ_IE_ORIG_SN(hwmp_ie);
orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie);
orig_metric = PREQ_IE_METRIC(hwmp_ie);
break;
* information from both PREQ and PREP frames.
*/
orig_addr = PREP_IE_ORIG_ADDR(hwmp_ie);
- orig_dsn = PREP_IE_ORIG_DSN(hwmp_ie);
+ orig_sn = PREP_IE_ORIG_SN(hwmp_ie);
orig_lifetime = PREP_IE_LIFETIME(hwmp_ie);
orig_metric = PREP_IE_METRIC(hwmp_ie);
break;
new_metric = MAX_METRIC;
exp_time = TU_TO_EXP_TIME(orig_lifetime);
- if (memcmp(orig_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) {
+ if (memcmp(orig_addr, sdata->vif.addr, ETH_ALEN) == 0) {
/* This MP is the originator, we are not interested in this
* frame, except for updating transmitter's path info.
*/
if (mpath->flags & MESH_PATH_FIXED)
fresh_info = false;
else if ((mpath->flags & MESH_PATH_ACTIVE) &&
- (mpath->flags & MESH_PATH_DSN_VALID)) {
- if (DSN_GT(mpath->dsn, orig_dsn) ||
- (mpath->dsn == orig_dsn &&
+ (mpath->flags & MESH_PATH_SN_VALID)) {
+ if (SN_GT(mpath->sn, orig_sn) ||
+ (mpath->sn == orig_sn &&
action == MPATH_PREQ &&
new_metric > mpath->metric)) {
process = false;
if (fresh_info) {
mesh_path_assign_nexthop(mpath, sta);
- mpath->flags |= MESH_PATH_DSN_VALID;
+ mpath->flags |= MESH_PATH_SN_VALID;
mpath->metric = new_metric;
- mpath->dsn = orig_dsn;
+ mpath->sn = orig_sn;
mpath->exp_time = time_after(mpath->exp_time, exp_time)
? mpath->exp_time : exp_time;
mesh_path_activate(mpath);
if (fresh_info) {
mesh_path_assign_nexthop(mpath, sta);
- mpath->flags &= ~MESH_PATH_DSN_VALID;
+ mpath->flags &= ~MESH_PATH_SN_VALID;
mpath->metric = last_hop_metric;
mpath->exp_time = time_after(mpath->exp_time, exp_time)
? mpath->exp_time : exp_time;
static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt,
- u8 *preq_elem, u32 metric) {
+ u8 *preq_elem, u32 metric)
+{
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
struct mesh_path *mpath;
- u8 *dst_addr, *orig_addr;
- u8 dst_flags, ttl;
- u32 orig_dsn, dst_dsn, lifetime;
+ u8 *target_addr, *orig_addr;
+ u8 target_flags, ttl;
+ u32 orig_sn, target_sn, lifetime;
bool reply = false;
bool forward = true;
- /* Update destination DSN, if present */
- dst_addr = PREQ_IE_DST_ADDR(preq_elem);
+ /* Update target SN, if present */
+ target_addr = PREQ_IE_TARGET_ADDR(preq_elem);
orig_addr = PREQ_IE_ORIG_ADDR(preq_elem);
- dst_dsn = PREQ_IE_DST_DSN(preq_elem);
- orig_dsn = PREQ_IE_ORIG_DSN(preq_elem);
- dst_flags = PREQ_IE_DST_F(preq_elem);
+ target_sn = PREQ_IE_TARGET_SN(preq_elem);
+ orig_sn = PREQ_IE_ORIG_SN(preq_elem);
+ target_flags = PREQ_IE_TARGET_F(preq_elem);
+
+ mhwmp_dbg("received PREQ from %pM\n", orig_addr);
- if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) {
+ if (memcmp(target_addr, sdata->vif.addr, ETH_ALEN) == 0) {
+ mhwmp_dbg("PREQ is for us\n");
forward = false;
reply = true;
metric = 0;
- if (time_after(jiffies, ifmsh->last_dsn_update +
+ if (time_after(jiffies, ifmsh->last_sn_update +
net_traversal_jiffies(sdata)) ||
- time_before(jiffies, ifmsh->last_dsn_update)) {
- dst_dsn = ++ifmsh->dsn;
- ifmsh->last_dsn_update = jiffies;
+ time_before(jiffies, ifmsh->last_sn_update)) {
+ target_sn = ++ifmsh->sn;
+ ifmsh->last_sn_update = jiffies;
}
} else {
rcu_read_lock();
- mpath = mesh_path_lookup(dst_addr, sdata);
+ mpath = mesh_path_lookup(target_addr, sdata);
if (mpath) {
- if ((!(mpath->flags & MESH_PATH_DSN_VALID)) ||
- DSN_LT(mpath->dsn, dst_dsn)) {
- mpath->dsn = dst_dsn;
- mpath->flags &= MESH_PATH_DSN_VALID;
- } else if ((!(dst_flags & MP_F_DO)) &&
+ if ((!(mpath->flags & MESH_PATH_SN_VALID)) ||
+ SN_LT(mpath->sn, target_sn)) {
+ mpath->sn = target_sn;
+ mpath->flags |= MESH_PATH_SN_VALID;
+ } else if ((!(target_flags & MP_F_DO)) &&
(mpath->flags & MESH_PATH_ACTIVE)) {
reply = true;
metric = mpath->metric;
- dst_dsn = mpath->dsn;
- if (dst_flags & MP_F_RF)
- dst_flags |= MP_F_DO;
+ target_sn = mpath->sn;
+ if (target_flags & MP_F_RF)
+ target_flags |= MP_F_DO;
else
forward = false;
}
if (reply) {
lifetime = PREQ_IE_LIFETIME(preq_elem);
ttl = ifmsh->mshcfg.dot11MeshTTL;
- if (ttl != 0)
- mesh_path_sel_frame_tx(MPATH_PREP, 0, dst_addr,
- cpu_to_le32(dst_dsn), 0, orig_addr,
- cpu_to_le32(orig_dsn), mgmt->sa, 0, ttl,
+ if (ttl != 0) {
+ mhwmp_dbg("replying to the PREQ\n");
+ mesh_path_sel_frame_tx(MPATH_PREP, 0, target_addr,
+ cpu_to_le32(target_sn), 0, orig_addr,
+ cpu_to_le32(orig_sn), mgmt->sa, 0, ttl,
cpu_to_le32(lifetime), cpu_to_le32(metric),
0, sdata);
- else
+ } else
ifmsh->mshstats.dropped_frames_ttl++;
}
ifmsh->mshstats.dropped_frames_ttl++;
return;
}
+ mhwmp_dbg("forwarding the PREQ from %pM\n", orig_addr);
--ttl;
flags = PREQ_IE_FLAGS(preq_elem);
preq_id = PREQ_IE_PREQ_ID(preq_elem);
hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1;
mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr,
- cpu_to_le32(orig_dsn), dst_flags, dst_addr,
- cpu_to_le32(dst_dsn), sdata->dev->broadcast,
+ cpu_to_le32(orig_sn), target_flags, target_addr,
+ cpu_to_le32(target_sn), broadcast_addr,
hopcount, ttl, cpu_to_le32(lifetime),
cpu_to_le32(metric), cpu_to_le32(preq_id),
sdata);
+ ifmsh->mshstats.fwded_mcast++;
ifmsh->mshstats.fwded_frames++;
}
}
u8 *prep_elem, u32 metric)
{
struct mesh_path *mpath;
- u8 *dst_addr, *orig_addr;
+ u8 *target_addr, *orig_addr;
u8 ttl, hopcount, flags;
u8 next_hop[ETH_ALEN];
- u32 dst_dsn, orig_dsn, lifetime;
+ u32 target_sn, orig_sn, lifetime;
+
+ mhwmp_dbg("received PREP from %pM\n", PREP_IE_ORIG_ADDR(prep_elem));
/* Note that we divert from the draft nomenclature and denominate
* destination to what the draft refers to as origininator. So in this
* which corresponds with the originator of the PREQ which this PREP
* replies
*/
- dst_addr = PREP_IE_DST_ADDR(prep_elem);
- if (memcmp(dst_addr, sdata->dev->dev_addr, ETH_ALEN) == 0)
+ target_addr = PREP_IE_TARGET_ADDR(prep_elem);
+ if (memcmp(target_addr, sdata->vif.addr, ETH_ALEN) == 0)
/* destination, no forwarding required */
return;
}
rcu_read_lock();
- mpath = mesh_path_lookup(dst_addr, sdata);
+ mpath = mesh_path_lookup(target_addr, sdata);
if (mpath)
spin_lock_bh(&mpath->state_lock);
else
lifetime = PREP_IE_LIFETIME(prep_elem);
hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1;
orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
- dst_dsn = PREP_IE_DST_DSN(prep_elem);
- orig_dsn = PREP_IE_ORIG_DSN(prep_elem);
+ target_sn = PREP_IE_TARGET_SN(prep_elem);
+ orig_sn = PREP_IE_ORIG_SN(prep_elem);
mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr,
- cpu_to_le32(orig_dsn), 0, dst_addr,
- cpu_to_le32(dst_dsn), mpath->next_hop->sta.addr, hopcount, ttl,
- cpu_to_le32(lifetime), cpu_to_le32(metric),
+ cpu_to_le32(orig_sn), 0, target_addr,
+ cpu_to_le32(target_sn), mpath->next_hop->sta.addr, hopcount,
+ ttl, cpu_to_le32(lifetime), cpu_to_le32(metric),
0, sdata);
rcu_read_unlock();
+
+ sdata->u.mesh.mshstats.fwded_unicast++;
sdata->u.mesh.mshstats.fwded_frames++;
return;
static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, u8 *perr_elem)
{
+ struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
struct mesh_path *mpath;
- u8 *ta, *dst_addr;
- u32 dst_dsn;
+ u8 ttl;
+ u8 *ta, *target_addr;
+ u8 target_flags;
+ u32 target_sn;
+ u16 target_rcode;
ta = mgmt->sa;
- dst_addr = PERR_IE_DST_ADDR(perr_elem);
- dst_dsn = PERR_IE_DST_DSN(perr_elem);
+ ttl = PERR_IE_TTL(perr_elem);
+ if (ttl <= 1) {
+ ifmsh->mshstats.dropped_frames_ttl++;
+ return;
+ }
+ ttl--;
+ target_flags = PERR_IE_TARGET_FLAGS(perr_elem);
+ target_addr = PERR_IE_TARGET_ADDR(perr_elem);
+ target_sn = PERR_IE_TARGET_SN(perr_elem);
+ target_rcode = PERR_IE_TARGET_RCODE(perr_elem);
+
rcu_read_lock();
- mpath = mesh_path_lookup(dst_addr, sdata);
+ mpath = mesh_path_lookup(target_addr, sdata);
if (mpath) {
spin_lock_bh(&mpath->state_lock);
if (mpath->flags & MESH_PATH_ACTIVE &&
memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 &&
- (!(mpath->flags & MESH_PATH_DSN_VALID) ||
- DSN_GT(dst_dsn, mpath->dsn))) {
+ (!(mpath->flags & MESH_PATH_SN_VALID) ||
+ SN_GT(target_sn, mpath->sn))) {
mpath->flags &= ~MESH_PATH_ACTIVE;
- mpath->dsn = dst_dsn;
+ mpath->sn = target_sn;
spin_unlock_bh(&mpath->state_lock);
- mesh_path_error_tx(dst_addr, cpu_to_le32(dst_dsn),
- sdata->dev->broadcast, sdata);
+ mesh_path_error_tx(ttl, target_addr, cpu_to_le32(target_sn),
+ cpu_to_le16(target_rcode),
+ broadcast_addr, sdata);
} else
spin_unlock_bh(&mpath->state_lock);
}
rcu_read_unlock();
}
+static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_mgmt *mgmt,
+ struct ieee80211_rann_ie *rann)
+{
+ struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+ struct mesh_path *mpath;
+ u8 *ta;
+ u8 ttl, flags, hopcount;
+ u8 *orig_addr;
+ u32 orig_sn, metric;
+
+ ta = mgmt->sa;
+ ttl = rann->rann_ttl;
+ if (ttl <= 1) {
+ ifmsh->mshstats.dropped_frames_ttl++;
+ return;
+ }
+ ttl--;
+ flags = rann->rann_flags;
+ orig_addr = rann->rann_addr;
+ orig_sn = rann->rann_seq;
+ hopcount = rann->rann_hopcount;
+ hopcount++;
+ metric = rann->rann_metric;
+ mhwmp_dbg("received RANN from %pM\n", orig_addr);
+
+ rcu_read_lock();
+ mpath = mesh_path_lookup(orig_addr, sdata);
+ if (!mpath) {
+ mesh_path_add(orig_addr, sdata);
+ mpath = mesh_path_lookup(orig_addr, sdata);
+ if (!mpath) {
+ rcu_read_unlock();
+ sdata->u.mesh.mshstats.dropped_frames_no_route++;
+ return;
+ }
+ mesh_queue_preq(mpath,
+ PREQ_Q_F_START | PREQ_Q_F_REFRESH);
+ }
+ if (mpath->sn < orig_sn) {
+ mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr,
+ cpu_to_le32(orig_sn),
+ 0, NULL, 0, broadcast_addr,
+ hopcount, ttl, 0,
+ cpu_to_le32(metric + mpath->metric),
+ 0, sdata);
+ mpath->sn = orig_sn;
+ }
+ rcu_read_unlock();
+}
void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable,
len - baselen, &elems);
- switch (mgmt->u.action.u.mesh_action.action_code) {
- case MPATH_PREQ:
- if (!elems.preq || elems.preq_len != 37)
+ if (elems.preq) {
+ if (elems.preq_len != 37)
/* Right now we support just 1 destination and no AE */
return;
- last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq);
- if (!last_hop_metric)
- return;
- hwmp_preq_frame_process(sdata, mgmt, elems.preq, last_hop_metric);
- break;
- case MPATH_PREP:
- if (!elems.prep || elems.prep_len != 31)
+ last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq,
+ MPATH_PREQ);
+ if (last_hop_metric)
+ hwmp_preq_frame_process(sdata, mgmt, elems.preq,
+ last_hop_metric);
+ }
+ if (elems.prep) {
+ if (elems.prep_len != 31)
/* Right now we support no AE */
return;
- last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep);
- if (!last_hop_metric)
- return;
- hwmp_prep_frame_process(sdata, mgmt, elems.prep, last_hop_metric);
- break;
- case MPATH_PERR:
- if (!elems.perr || elems.perr_len != 12)
+ last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep,
+ MPATH_PREP);
+ if (last_hop_metric)
+ hwmp_prep_frame_process(sdata, mgmt, elems.prep,
+ last_hop_metric);
+ }
+ if (elems.perr) {
+ if (elems.perr_len != 15)
/* Right now we support only one destination per PERR */
return;
hwmp_perr_frame_process(sdata, mgmt, elems.perr);
- default:
- return;
}
-
+ if (elems.rann)
+ hwmp_rann_frame_process(sdata, mgmt, elems.rann);
}
/**
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
struct mesh_preq_queue *preq_node;
- preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_KERNEL);
+ preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC);
if (!preq_node) {
- printk(KERN_DEBUG "Mesh HWMP: could not allocate PREQ node\n");
+ mhwmp_dbg("could not allocate PREQ node\n");
return;
}
spin_unlock(&ifmsh->mesh_preq_queue_lock);
kfree(preq_node);
if (printk_ratelimit())
- printk(KERN_DEBUG "Mesh HWMP: PREQ node queue full\n");
+ mhwmp_dbg("PREQ node queue full\n");
return;
}
spin_unlock(&ifmsh->mesh_preq_queue_lock);
if (time_after(jiffies, ifmsh->last_preq + min_preq_int_jiff(sdata)))
- queue_work(sdata->local->hw.workqueue, &ifmsh->work);
+ ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
else if (time_before(jiffies, ifmsh->last_preq)) {
/* avoid long wait if did not send preqs for a long time
* and jiffies wrapped around
*/
ifmsh->last_preq = jiffies - min_preq_int_jiff(sdata) - 1;
- queue_work(sdata->local->hw.workqueue, &ifmsh->work);
+ ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
} else
mod_timer(&ifmsh->mesh_path_timer, ifmsh->last_preq +
min_preq_int_jiff(sdata));
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
struct mesh_preq_queue *preq_node;
struct mesh_path *mpath;
- u8 ttl, dst_flags;
+ u8 ttl, target_flags;
u32 lifetime;
- spin_lock(&ifmsh->mesh_preq_queue_lock);
+ spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
if (!ifmsh->preq_queue_len ||
time_before(jiffies, ifmsh->last_preq +
min_preq_int_jiff(sdata))) {
- spin_unlock(&ifmsh->mesh_preq_queue_lock);
+ spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
return;
}
struct mesh_preq_queue, list);
list_del(&preq_node->list);
--ifmsh->preq_queue_len;
- spin_unlock(&ifmsh->mesh_preq_queue_lock);
+ spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
rcu_read_lock();
mpath = mesh_path_lookup(preq_node->dst, sdata);
ifmsh->last_preq = jiffies;
- if (time_after(jiffies, ifmsh->last_dsn_update +
+ if (time_after(jiffies, ifmsh->last_sn_update +
net_traversal_jiffies(sdata)) ||
- time_before(jiffies, ifmsh->last_dsn_update)) {
- ++ifmsh->dsn;
- sdata->u.mesh.last_dsn_update = jiffies;
+ time_before(jiffies, ifmsh->last_sn_update)) {
+ ++ifmsh->sn;
+ sdata->u.mesh.last_sn_update = jiffies;
}
lifetime = default_lifetime(sdata);
ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
}
if (preq_node->flags & PREQ_Q_F_REFRESH)
- dst_flags = MP_F_DO;
+ target_flags = MP_F_DO;
else
- dst_flags = MP_F_RF;
+ target_flags = MP_F_RF;
spin_unlock_bh(&mpath->state_lock);
- mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr,
- cpu_to_le32(ifmsh->dsn), dst_flags, mpath->dst,
- cpu_to_le32(mpath->dsn), sdata->dev->broadcast, 0,
+ mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->vif.addr,
+ cpu_to_le32(ifmsh->sn), target_flags, mpath->dst,
+ cpu_to_le32(mpath->sn), broadcast_addr, 0,
ttl, cpu_to_le32(lifetime), 0,
cpu_to_le32(ifmsh->preq_id++), sdata);
mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);
}
/**
- * ieee80211s_lookup_nexthop - put the appropriate next hop on a mesh frame
+ * mesh_nexthop_lookup - put the appropriate next hop on a mesh frame
*
* @skb: 802.11 frame to be sent
* @sdata: network subif the frame will be sent through
struct sk_buff *skb_to_free = NULL;
struct mesh_path *mpath;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- u8 *dst_addr = hdr->addr3;
+ u8 *target_addr = hdr->addr3;
int err = 0;
rcu_read_lock();
- mpath = mesh_path_lookup(dst_addr, sdata);
+ mpath = mesh_path_lookup(target_addr, sdata);
if (!mpath) {
- mesh_path_add(dst_addr, sdata);
- mpath = mesh_path_lookup(dst_addr, sdata);
+ mesh_path_add(target_addr, sdata);
+ mpath = mesh_path_lookup(target_addr, sdata);
if (!mpath) {
- dev_kfree_skb(skb);
sdata->u.mesh.mshstats.dropped_frames_no_route++;
err = -ENOSPC;
goto endlookup;
}
if (mpath->flags & MESH_PATH_ACTIVE) {
- if (time_after(jiffies, mpath->exp_time -
- msecs_to_jiffies(sdata->u.mesh.mshcfg.path_refresh_time))
- && !memcmp(sdata->dev->dev_addr, hdr->addr4,
- ETH_ALEN)
- && !(mpath->flags & MESH_PATH_RESOLVING)
- && !(mpath->flags & MESH_PATH_FIXED)) {
+ if (time_after(jiffies,
+ mpath->exp_time -
+ msecs_to_jiffies(sdata->u.mesh.mshcfg.path_refresh_time)) &&
+ !memcmp(sdata->vif.addr, hdr->addr4, ETH_ALEN) &&
+ !(mpath->flags & MESH_PATH_RESOLVING) &&
+ !(mpath->flags & MESH_PATH_FIXED)) {
mesh_queue_preq(mpath,
PREQ_Q_F_START | PREQ_Q_F_REFRESH);
}
- memcpy(hdr->addr1, mpath->next_hop->sta.addr,
- ETH_ALEN);
+ memcpy(hdr->addr1, mpath->next_hop->sta.addr, ETH_ALEN);
} else {
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (!(mpath->flags & MESH_PATH_RESOLVING)) {
/* Start discovery only if it is not running yet */
mesh_queue_preq(mpath, PREQ_Q_F_START);
}
if (skb_queue_len(&mpath->frame_queue) >=
- MESH_FRAME_QUEUE_LEN) {
- skb_to_free = mpath->frame_queue.next;
- skb_unlink(skb_to_free, &mpath->frame_queue);
- }
+ MESH_FRAME_QUEUE_LEN)
+ skb_to_free = skb_dequeue(&mpath->frame_queue);
+ info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
skb_queue_tail(&mpath->frame_queue, skb);
if (skb_to_free)
mesh_path_discard_frame(skb_to_free, sdata);
mpath = rcu_dereference(mpath);
if (!mpath)
goto endmpathtimer;
- spin_lock_bh(&mpath->state_lock);
sdata = mpath->sdata;
+
+ if (sdata->local->quiescing) {
+ rcu_read_unlock();
+ return;
+ }
+
+ spin_lock_bh(&mpath->state_lock);
if (mpath->flags & MESH_PATH_RESOLVED ||
(!(mpath->flags & MESH_PATH_RESOLVING)))
mpath->flags &= ~(MESH_PATH_RESOLVING | MESH_PATH_RESOLVED);
endmpathtimer:
rcu_read_unlock();
}
+
+void
+mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+ mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->vif.addr,
+ cpu_to_le32(++ifmsh->sn),
+ 0, NULL, 0, broadcast_addr,
+ 0, MESH_TTL, 0, 0, 0, sdata);
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff