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nl80211/mac80211: define and allow configuring mesh element TTL

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The TTL in path selection information elements is different from
the mesh ttl used in mesh data frames.  Version 7.03 of the 11s
draft calls this ttl 'Element TTL'.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Javier Cardona 2010-12-03 09:20:40 +01:00 committed by John W. Linville
parent b9e61f11f4
commit 45904f2165
9 changed files with 27 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/nl80211.h
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@ -1547,6 +1547,9 @@ enum nl80211_mntr_flags {
* @NL80211_MESHCONF_TTL: specifies the value of TTL field set at a source mesh
* point.
*
* @NL80211_MESHCONF_ELEMENT_TTL: specifies the value of TTL field set at a
* source mesh point for path selection elements.
*
* @NL80211_MESHCONF_AUTO_OPEN_PLINKS: whether we should automatically
* open peer links when we detect compatible mesh peers.
*
@ -1593,6 +1596,7 @@ enum nl80211_meshconf_params {
NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
NL80211_MESHCONF_HWMP_ROOTMODE,
NL80211_MESHCONF_ELEMENT_TTL,
/* keep last */
__NL80211_MESHCONF_ATTR_AFTER_LAST,

2
include/net/cfg80211.h
View File

@ -624,6 +624,8 @@ struct mesh_config {
u16 dot11MeshMaxPeerLinks;
u8 dot11MeshMaxRetries;
u8 dot11MeshTTL;
/* ttl used in path selection information elements */
u8 element_ttl;
bool auto_open_plinks;
/* HWMP parameters */
u8 dot11MeshHWMPmaxPREQretries;

2
net/mac80211/cfg.c
View File

@ -1024,6 +1024,8 @@ static int ieee80211_set_mesh_params(struct wiphy *wiphy,
conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
conf->dot11MeshTTL = nconf->dot11MeshTTL;
if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
conf->dot11MeshTTL = nconf->element_ttl;
if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
conf->auto_open_plinks = nconf->auto_open_plinks;
if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))

2
net/mac80211/debugfs_netdev.c
View File

@ -251,6 +251,7 @@ IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
IEEE80211_IF_FILE(element_ttl, u.mesh.mshcfg.element_ttl, DEC);
IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
@ -355,6 +356,7 @@ static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
MESHPARAMS_ADD(dot11MeshConfirmTimeout);
MESHPARAMS_ADD(dot11MeshHoldingTimeout);
MESHPARAMS_ADD(dot11MeshTTL);
MESHPARAMS_ADD(element_ttl);
MESHPARAMS_ADD(auto_open_plinks);
MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);

1
net/mac80211/mesh.c
View File

@ -668,6 +668,7 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T;
ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR;
ifmsh->mshcfg.dot11MeshTTL = MESH_TTL;
ifmsh->mshcfg.element_ttl = MESH_DEFAULT_ELEMENT_TTL;
ifmsh->mshcfg.auto_open_plinks = true;
ifmsh->mshcfg.dot11MeshMaxPeerLinks =
MESH_MAX_ESTAB_PLINKS;

2
net/mac80211/mesh.h
View File

@ -216,6 +216,8 @@ struct mesh_rmc {
#define PERR_RCODE_NO_ROUTE 12
#define PERR_RCODE_DEST_UNREACH 13
#define MESH_DEFAULT_ELEMENT_TTL 31
/* Public interfaces */
/* Various */
int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,

9
net/mac80211/mesh_hwmp.c
View File

@ -232,7 +232,7 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
*pos++ = WLAN_EID_PERR;
*pos++ = ie_len;
/* ttl */
*pos++ = MESH_TTL;
*pos++ = ttl;
/* number of destinations */
*pos++ = 1;
/*
@ -522,7 +522,7 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
if (reply) {
lifetime = PREQ_IE_LIFETIME(preq_elem);
ttl = ifmsh->mshcfg.dot11MeshTTL;
ttl = ifmsh->mshcfg.element_ttl;
if (ttl != 0) {
mhwmp_dbg("replying to the PREQ\n");
mesh_path_sel_frame_tx(MPATH_PREP, 0, target_addr,
@ -877,7 +877,7 @@ void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
sdata->u.mesh.last_sn_update = jiffies;
}
lifetime = default_lifetime(sdata);
ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
ttl = sdata->u.mesh.mshcfg.element_ttl;
if (ttl == 0) {
sdata->u.mesh.mshstats.dropped_frames_ttl++;
spin_unlock_bh(&mpath->state_lock);
@ -1013,5 +1013,6 @@ mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
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);
0, sdata->u.mesh.mshcfg.element_ttl,
0, 0, 0, sdata);
}

7
net/mac80211/mesh_pathtbl.c
View File

@ -467,8 +467,8 @@ void mesh_plink_broken(struct sta_info *sta)
mpath->flags &= ~MESH_PATH_ACTIVE;
++mpath->sn;
spin_unlock_bh(&mpath->state_lock);
mesh_path_error_tx(MESH_TTL, mpath->dst,
cpu_to_le32(mpath->sn),
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);
} else
@ -614,7 +614,8 @@ void mesh_path_discard_frame(struct sk_buff *skb,
mpath = mesh_path_lookup(da, sdata);
if (mpath)
sn = ++mpath->sn;
mesh_path_error_tx(MESH_TTL, skb->data, cpu_to_le32(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);
}

5
net/wireless/nl80211.c
View File

@ -2582,6 +2582,8 @@ static int nl80211_get_mesh_params(struct sk_buff *skb,
cur_params.dot11MeshMaxRetries);
NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
cur_params.dot11MeshTTL);
NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
cur_params.element_ttl);
NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
cur_params.auto_open_plinks);
NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
@ -2623,6 +2625,7 @@ static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_A
[NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
[NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
[NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
[NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
[NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
[NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
@ -2670,6 +2673,8 @@ static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
mask, NL80211_MESHCONF_TTL, nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,