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Diffstat (limited to 'net/mac80211/mesh.c')
-rw-r--r--net/mac80211/mesh.c98
1 files changed, 83 insertions, 15 deletions
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 737e1f082b0d..a550c707cd8a 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -345,7 +345,7 @@ int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
data = ifmsh->ie + offset;
if (skb_tailroom(skb) < len)
return -ENOMEM;
- memcpy(skb_put(skb, len), data, len);
+ skb_put_data(skb, data, len);
}
return 0;
@@ -369,7 +369,7 @@ int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
if (skb_tailroom(skb) < len)
return -ENOMEM;
- memcpy(skb_put(skb, len), data, len);
+ skb_put_data(skb, data, len);
return 0;
}
@@ -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) +
@@ -716,8 +719,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
bcn->head = ((u8 *) bcn) + sizeof(*bcn);
/* fill in the head */
- mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
- memset(mgmt, 0, hdr_len);
+ mgmt = skb_put_zero(skb, hdr_len);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_BEACON);
eth_broadcast_addr(mgmt->da);
@@ -736,8 +738,12 @@ 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_zero(skb, ie_len);
*pos++ = WLAN_EID_CHANNEL_SWITCH;
*pos++ = 3;
*pos++ = 0x0;
@@ -760,6 +766,37 @@ 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_zero(skb, 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_zero(skb, 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();
@@ -916,6 +953,21 @@ void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
ieee80211_configure_filter(local);
}
+static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
+{
+ int err;
+
+ /* if the current channel is a DFS channel, mark the channel as
+ * unavailable.
+ */
+ err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
+ &sdata->vif.bss_conf.chandef,
+ NL80211_IFTYPE_MESH_POINT);
+ if (err > 0)
+ cfg80211_radar_event(sdata->local->hw.wiphy,
+ &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
+}
+
static bool
ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems *elems, bool beacon)
@@ -933,19 +985,20 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
if (!sband)
return false;
- sta_flags = IEEE80211_STA_DISABLE_VHT;
+ sta_flags = 0;
switch (sdata->vif.bss_conf.chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
sta_flags |= IEEE80211_STA_DISABLE_HT;
case NL80211_CHAN_WIDTH_20:
sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
+ case NL80211_CHAN_WIDTH_40:
+ sta_flags |= IEEE80211_STA_DISABLE_VHT;
break;
default:
break;
}
memset(&params, 0, sizeof(params));
- memset(&csa_ie, 0, sizeof(csa_ie));
err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
sta_flags, sdata->vif.addr,
&csa_ie);
@@ -954,11 +1007,19 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
if (err)
return false;
+ /* Mark the channel unavailable if the reason for the switch is
+ * regulatory.
+ */
+ if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
+ ieee80211_mesh_csa_mark_radar(sdata);
+
params.chandef = csa_ie.chandef;
params.count = csa_ie.count;
if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, &params.chandef,
- IEEE80211_CHAN_DISABLED)) {
+ IEEE80211_CHAN_DISABLED) ||
+ !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, &params.chandef,
+ NL80211_IFTYPE_MESH_POINT)) {
sdata_info(sdata,
"mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
sdata->vif.addr,
@@ -974,9 +1035,16 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
NL80211_IFTYPE_MESH_POINT);
if (err < 0)
return false;
- if (err > 0)
- /* TODO: DFS not (yet) supported */
+ if (err > 0 && !ifmsh->userspace_handles_dfs) {
+ sdata_info(sdata,
+ "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
+ sdata->vif.addr,
+ params.chandef.chan->center_freq,
+ params.chandef.width,
+ params.chandef.center_freq1,
+ params.chandef.center_freq2);
return false;
+ }
params.radar_required = err;
@@ -1057,8 +1125,8 @@ ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
goto out;
skb_reserve(presp, local->tx_headroom);
- memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
- memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
+ skb_put_data(presp, bcn->head, bcn->head_len);
+ skb_put_data(presp, bcn->tail, bcn->tail_len);
hdr = (struct ieee80211_mgmt *) presp->data;
hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_PROBE_RESP);
@@ -1197,7 +1265,7 @@ static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
if (!skb)
return -ENOMEM;
skb_reserve(skb, local->tx_headroom);
- mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len);
+ mgmt_fwd = skb_put(skb, len);
/* offset_ttl is based on whether the secondary channel
* offset is available or not. Subtract 1 from the mesh TTL
@@ -1233,7 +1301,7 @@ static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
pos = mgmt->u.action.u.chan_switch.variable;
baselen = offsetof(struct ieee80211_mgmt,
u.action.u.chan_switch.variable);
- ieee802_11_parse_elems(pos, len - baselen, false, &elems);
+ ieee802_11_parse_elems(pos, len - baselen, true, &elems);
ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
if (!--ifmsh->chsw_ttl)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.