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authorSimon Wunderlich <sw@simonwunderlich.de>2017-05-23 17:00:42 +0200
committerJohannes Berg <johannes.berg@intel.com>2017-05-24 08:58:54 +0200
commit75d627d53e015027d0f85c928673d368807243cc (patch)
treebb3c83d7ec03ed07d2fd68a3456bf43fe704d1b7 /net/mac80211
parent3b23782f7d004f3d7fa655623ebca3137b442656 (diff)
downloadlinux-75d627d53e015027d0f85c928673d368807243cc.tar.bz2
mac80211: mesh: support sending wide bandwidth CSA
To support HT and VHT CSA, beacons and action frames must include the corresponding IEs. Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> [make ieee80211_ie_build_wide_bw_cs() return void] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/ieee80211_i.h2
-rw-r--r--net/mac80211/mesh.c45
-rw-r--r--net/mac80211/util.c37
3 files changed, 82 insertions, 2 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index c960e4999380..a34abd8784d3 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -2066,6 +2066,8 @@ u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
const struct cfg80211_chan_def *chandef,
u16 prot_mode, bool rifs_mode);
+void ieee80211_ie_build_wide_bw_cs(u8 *pos,
+ const struct cfg80211_chan_def *chandef);
u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
u32 cap);
u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 2f189c59ae80..d6cc0080866d 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -690,6 +690,9 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
2 + sizeof(struct ieee80211_channel_sw_ie) +
/* Mesh Channel Switch Parameters */
2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
+ /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
+ 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
+ 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
2 + 8 + /* supported rates */
2 + 3; /* DS params */
tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
@@ -736,8 +739,13 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
rcu_read_lock();
csa = rcu_dereference(ifmsh->csa);
if (csa) {
- pos = skb_put(skb, 13);
- memset(pos, 0, 13);
+ enum nl80211_channel_type ct;
+ struct cfg80211_chan_def *chandef;
+ int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
+ 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
+
+ pos = skb_put(skb, ie_len);
+ memset(pos, 0, ie_len);
*pos++ = WLAN_EID_CHANNEL_SWITCH;
*pos++ = 3;
*pos++ = 0x0;
@@ -760,6 +768,39 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
pos += 2;
put_unaligned_le16(ifmsh->pre_value, pos);
pos += 2;
+
+ switch (csa->settings.chandef.width) {
+ case NL80211_CHAN_WIDTH_40:
+ ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
+ pos = skb_put(skb, ie_len);
+ memset(pos, 0, ie_len);
+
+ *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
+ *pos++ = 1; /* len */
+ ct = cfg80211_get_chandef_type(&csa->settings.chandef);
+ if (ct == NL80211_CHAN_HT40PLUS)
+ *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+ else
+ *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+ break;
+ case NL80211_CHAN_WIDTH_80:
+ case NL80211_CHAN_WIDTH_80P80:
+ case NL80211_CHAN_WIDTH_160:
+ /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
+ ie_len = 2 + 2 +
+ sizeof(struct ieee80211_wide_bw_chansw_ie);
+ pos = skb_put(skb, ie_len);
+ memset(pos, 0, ie_len);
+
+ *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
+ *pos++ = 5; /* len */
+ /* put sub IE */
+ chandef = &csa->settings.chandef;
+ ieee80211_ie_build_wide_bw_cs(pos, chandef);
+ break;
+ default:
+ break;
+ }
}
rcu_read_unlock();
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ac9ac6c35594..de0f1cdb64d4 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2414,6 +2414,35 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
return pos + sizeof(struct ieee80211_ht_operation);
}
+void ieee80211_ie_build_wide_bw_cs(u8 *pos,
+ const struct cfg80211_chan_def *chandef)
+{
+ *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
+ *pos++ = 3; /* IE length */
+ /* New channel width */
+ switch (chandef->width) {
+ case NL80211_CHAN_WIDTH_80:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_160:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_80P80:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
+ break;
+ default:
+ *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
+ }
+
+ /* new center frequency segment 0 */
+ *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
+ /* new center frequency segment 1 */
+ if (chandef->center_freq2)
+ *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
+ else
+ *pos++ = 0;
+}
+
u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
const struct cfg80211_chan_def *chandef)
{
@@ -2964,6 +2993,7 @@ int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
skb = dev_alloc_skb(local->tx_headroom + hdr_len +
5 + /* channel switch announcement element */
3 + /* secondary channel offset element */
+ 5 + /* wide bandwidth channel switch announcement */
8); /* mesh channel switch parameters element */
if (!skb)
return -ENOMEM;
@@ -3022,6 +3052,13 @@ int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
pos += 2;
}
+ if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
+ csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
+ csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
+ skb_put(skb, 5);
+ ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
+ }
+
ieee80211_tx_skb(sdata, skb);
return 0;
}