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mac80211: update mesh path selection frame format 

Make mesh path selection frames Mesh Action category, remove outdated
Mesh Path Selection category and defines, use updated reason codes, add
mesh_action_is_path_sel for readability, and update/correct path
selection IEs.

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Thomas Pedersen 2011-08-11 19:35:15 -07:00 committed by John W. Linville
parent 36c704fded
commit 25d49e4d63
6 changed files with 69 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/ieee80211.h
View File

@ -629,6 +629,7 @@ struct ieee80211_rann_ie {
u8 rann_ttl;
u8 rann_addr[6];
u32 rann_seq;
u32 rann_interval;
u32 rann_metric;
} __attribute__ ((packed));
@ -1269,9 +1270,6 @@ enum ieee80211_category {
WLAN_CATEGORY_MULTIHOP_ACTION = 14,
WLAN_CATEGORY_SELF_PROTECTED = 15,
WLAN_CATEGORY_WMM = 17,
/* TODO: remove MESH_PATH_SEL after mesh is updated
* to current 802.11s draft */
WLAN_CATEGORY_MESH_PATH_SEL = 32,
WLAN_CATEGORY_VENDOR_SPECIFIC_PROTECTED = 126,
WLAN_CATEGORY_VENDOR_SPECIFIC = 127,
};

20
net/mac80211/mesh.c
View File

@ -13,10 +13,6 @@
#include "ieee80211_i.h"
#include "mesh.h"
#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
#define IEEE80211_MESH_RANN_INTERVAL (1 * HZ)
#define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01
#define MESHCONF_CAPAB_FORWARDING 0x08
@ -27,6 +23,17 @@
int mesh_allocated;
static struct kmem_cache *rm_cache;
#ifdef CONFIG_MAC80211_MESH
bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
{
return (mgmt->u.action.u.mesh_action.action_code ==
WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
}
#else
bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
{ return false; }
#endif
void ieee80211s_init(void)
{
mesh_pathtbl_init();
@ -671,8 +678,9 @@ static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
break;
}
break;
case WLAN_CATEGORY_MESH_PATH_SEL:
mesh_rx_path_sel_frame(sdata, mgmt, len);
case WLAN_CATEGORY_MESH_ACTION:
if (mesh_action_is_path_sel(mgmt))
mesh_rx_path_sel_frame(sdata, mgmt, len);
break;
}
}

12
net/mac80211/mesh.h
View File

@ -166,6 +166,9 @@ struct mesh_rmc {
u32 idx_mask;
};
#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
#define IEEE80211_MESH_RANN_INTERVAL (1 * HZ)
#define MESH_DEFAULT_BEACON_INTERVAL 1000 /* in 1024 us units */
@ -177,14 +180,6 @@ struct mesh_rmc {
/* Maximum number of paths per interface */
#define MESH_MAX_MPATHS 1024
/* Pending ANA approval */
#define MESH_PATH_SEL_ACTION 0
/* PERR reason codes */
#define PEER_RCODE_UNSPECIFIED 11
#define PERR_RCODE_NO_ROUTE 12
#define PERR_RCODE_DEST_UNREACH 13
/* Public interfaces */
/* Various */
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
@ -276,6 +271,7 @@ void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
void mesh_path_restart(struct ieee80211_sub_if_data *sdata);
void mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata);
bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt);
extern int mesh_paths_generation;
#ifdef CONFIG_MAC80211_MESH

75
net/mac80211/mesh_hwmp.c
View File

@ -68,12 +68,12 @@ static inline u32 u16_field_get(u8 *preq_elem, int offset, bool ae)
#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_SN(x) u32_field_get(x, 9, 0)
#define PREP_IE_ORIG_ADDR(x) (AE_F_SET(x) ? x + 27 : x + 21)
#define PREP_IE_ORIG_SN(x) u32_field_get(x, 27, AE_F_SET(x))
#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_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 PREP_IE_TARGET_ADDR(x) (x + 3)
#define PREP_IE_TARGET_SN(x) u32_field_get(x, 9, 0)
#define PERR_IE_TTL(x) (*(x))
#define PERR_IE_TARGET_FLAGS(x) (*(x + 2))
@ -132,8 +132,9 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
/* BSSID == SA */
memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
mgmt->u.action.category = WLAN_CATEGORY_MESH_PATH_SEL;
mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION;
mgmt->u.action.u.mesh_action.action_code =
WLAN_MESH_ACTION_HWMP_PATH_SELECTION;
switch (action) {
case MPATH_PREQ:
@ -163,29 +164,37 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
*pos++ = flags;
*pos++ = hop_count;
*pos++ = ttl;
if (action == MPATH_PREQ) {
memcpy(pos, &preq_id, 4);
pos += 4;
}
memcpy(pos, orig_addr, ETH_ALEN);
pos += ETH_ALEN;
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++ = target_flags;
}
if (action != MPATH_RANN) {
if (action == MPATH_PREP) {
memcpy(pos, target, ETH_ALEN);
pos += ETH_ALEN;
memcpy(pos, &target_sn, 4);
pos += 4;
} else {
if (action == MPATH_PREQ) {
memcpy(pos, &preq_id, 4);
pos += 4;
}
memcpy(pos, orig_addr, ETH_ALEN);
pos += ETH_ALEN;
memcpy(pos, &orig_sn, 4);
pos += 4;
}
memcpy(pos, &lifetime, 4); /* interval for RANN */
pos += 4;
memcpy(pos, &metric, 4);
pos += 4;
if (action == MPATH_PREQ) {
*pos++ = 1; /* destination count */
*pos++ = target_flags;
memcpy(pos, target, ETH_ALEN);
pos += ETH_ALEN;
memcpy(pos, &target_sn, 4);
pos += 4;
} else if (action == MPATH_PREP) {
memcpy(pos, orig_addr, ETH_ALEN);
pos += ETH_ALEN;
memcpy(pos, &orig_sn, 4);
pos += 4;
}
ieee80211_tx_skb(sdata, skb);
@ -224,9 +233,11 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
memcpy(mgmt->da, ra, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
/* BSSID is left zeroed, wildcard value */
mgmt->u.action.category = WLAN_CATEGORY_MESH_PATH_SEL;
mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
/* BSSID == SA */
memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION;
mgmt->u.action.u.mesh_action.action_code =
WLAN_MESH_ACTION_HWMP_PATH_SELECTION;
ie_len = 15;
pos = skb_put(skb, 2 + ie_len);
*pos++ = WLAN_EID_PERR;
@ -683,6 +694,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
u8 ttl, flags, hopcount;
u8 *orig_addr;
u32 orig_sn, metric;
u32 interval = cpu_to_le32(IEEE80211_MESH_RANN_INTERVAL);
ttl = rann->rann_ttl;
if (ttl <= 1) {
@ -715,7 +727,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr,
cpu_to_le32(orig_sn),
0, NULL, 0, broadcast_addr,
hopcount, ttl, 0,
hopcount, ttl, interval,
cpu_to_le32(metric + mpath->metric),
0, sdata);
mpath->sn = orig_sn;
@ -1006,10 +1018,11 @@ void
mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
u32 interval = cpu_to_le32(IEEE80211_MESH_RANN_INTERVAL);
mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->vif.addr,
cpu_to_le32(++ifmsh->sn),
0, NULL, 0, broadcast_addr,
0, sdata->u.mesh.mshcfg.element_ttl,
0, 0, 0, sdata);
interval, 0, 0, sdata);
}

8
net/mac80211/mesh_pathtbl.c
View File

@ -539,6 +539,7 @@ void mesh_plink_broken(struct sta_info *sta)
struct hlist_node *p;
struct ieee80211_sub_if_data *sdata = sta->sdata;
int i;
__le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_DEST_UNREACHABLE);
rcu_read_lock();
tbl = rcu_dereference(mesh_paths);
@ -553,8 +554,7 @@ void mesh_plink_broken(struct sta_info *sta)
spin_unlock_bh(&mpath->state_lock);
mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl,
mpath->dst, cpu_to_le32(mpath->sn),
cpu_to_le16(PERR_RCODE_DEST_UNREACH),
bcast, sdata);
reason, bcast, sdata);
} else
spin_unlock_bh(&mpath->state_lock);
}
@ -699,6 +699,7 @@ void mesh_path_discard_frame(struct sk_buff *skb,
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct mesh_path *mpath;
u32 sn = 0;
__le16 reason = cpu_to_le16(WLAN_REASON_MESH_PATH_NOFORWARD);
if (memcmp(hdr->addr4, sdata->vif.addr, ETH_ALEN) != 0) {
u8 *ra, *da;
@ -709,8 +710,7 @@ void mesh_path_discard_frame(struct sk_buff *skb,
if (mpath)
sn = ++mpath->sn;
mesh_path_error_tx(sdata->u.mesh.mshcfg.element_ttl, skb->data,
cpu_to_le32(sn),
cpu_to_le16(PERR_RCODE_NO_ROUTE), ra, sdata);
cpu_to_le32(sn), reason, ra, sdata);
}
kfree_skb(skb);

5
net/mac80211/rx.c
View File

@ -2241,9 +2241,8 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
case WLAN_CATEGORY_MESH_ACTION:
if (!ieee80211_vif_is_mesh(&sdata->vif))
break;
goto queue;
case WLAN_CATEGORY_MESH_PATH_SEL:
if (!mesh_path_sel_is_hwmp(sdata))
if (mesh_action_is_path_sel(mgmt) &&
(!mesh_path_sel_is_hwmp(sdata)))
break;
goto queue;
}