From: Thomas Pedersen <thomas@cozybit.com>
To: johannes@sipsolutions.net
Cc: linux-wireless@vger.kernel.org, devel@lists.open80211s.org,
Thomas Pedersen <thomas@cozybit.com>
Subject: [PATCH v3 2/2] mac80211: generate mesh probe responses
Date: Thu, 14 Feb 2013 11:20:14 -0800 [thread overview]
Message-ID: <1360869614-29297-2-git-send-email-thomas@cozybit.com> (raw)
In-Reply-To: <1360869614-29297-1-git-send-email-thomas@cozybit.com>
Mesh interfaces will now respond to any broadcast (or
matching directed mesh) probe requests with a probe
response.
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
---
v2:
less verbose (Johannes)
net/mac80211/mesh.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
net/mac80211/rx.c | 5 +++--
2 files changed, 63 insertions(+), 2 deletions(-)
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 2eee2f1..b7a20ae 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -867,6 +867,63 @@ void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
sdata->u.mesh.timers_running = 0;
}
+static void
+ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_mgmt *mgmt, size_t len)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+ struct sk_buff *presp;
+ struct beacon_data *bcn;
+ struct ieee80211_mgmt *hdr;
+ struct ieee802_11_elems elems;
+ size_t baselen;
+ u8 *pos, *end;
+
+ end = ((u8 *) mgmt) + len;
+ pos = mgmt->u.probe_req.variable;
+ baselen = (u8 *) pos - (u8 *) mgmt;
+ if (baselen > len)
+ return;
+
+ ieee802_11_parse_elems(pos, len - baselen, &elems);
+
+ /* 802.11-2012 10.1.4.3.2 */
+ if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
+ !is_broadcast_ether_addr(mgmt->da)) ||
+ elems.ssid_len != 0)
+ return;
+
+ if (elems.mesh_id_len != 0 &&
+ (elems.mesh_id_len != ifmsh->mesh_id_len ||
+ memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
+ return;
+
+ rcu_read_lock();
+ bcn = rcu_dereference(ifmsh->beacon);
+
+ if (!bcn)
+ goto out;
+
+ presp = dev_alloc_skb(local->tx_headroom +
+ bcn->head_len + bcn->tail_len);
+ if (!presp)
+ 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);
+ hdr = (struct ieee80211_mgmt *) presp->data;
+ hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+ IEEE80211_STYPE_PROBE_RESP);
+ memcpy(hdr->da, mgmt->sa, ETH_ALEN);
+ mpl_dbg(sdata, "sending probe resp. to %pM\n", hdr->da);
+ IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+ ieee80211_tx_skb(sdata, presp);
+out:
+ rcu_read_unlock();
+}
+
static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
u16 stype,
struct ieee80211_mgmt *mgmt,
@@ -956,6 +1013,9 @@ void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
rx_status);
break;
+ case IEEE80211_STYPE_PROBE_REQ:
+ ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
+ break;
case IEEE80211_STYPE_ACTION:
ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
break;
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 30f1ba6..296a4ae 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2718,8 +2718,9 @@ ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
return RX_DROP_MONITOR;
break;
case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
- /* process only for ibss */
- if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
+ /* process only for ibss and mesh */
+ if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+ sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
return RX_DROP_MONITOR;
break;
default:
--
1.7.10.4
next prev parent reply other threads:[~2013-02-14 19:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-14 19:20 [PATCH v3 1/2] mac80211: cache mesh beacon Thomas Pedersen
2013-02-14 19:20 ` Thomas Pedersen [this message]
2013-02-14 19:54 ` Johannes Berg
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