@@ -2460,6 +2460,8 @@ struct cfg80211_qos_map {
*
* @set_wds_peer: set the WDS peer for a WDS interface
*
+ * @set_multicast_to_unicast: configure multicast to unicast conversion for BSS
+ *
* @rfkill_poll: polls the hw rfkill line, use cfg80211 reporting
* functions to adjust rfkill hw state
*
@@ -2722,6 +2724,10 @@ struct cfg80211_ops {
int (*set_wds_peer)(struct wiphy *wiphy, struct net_device *dev,
const u8 *addr);
+ int (*set_multicast_to_unicast)(struct wiphy *wiphy,
+ struct net_device *dev,
+ const bool enabled);
+
void (*rfkill_poll)(struct wiphy *wiphy);
#ifdef CONFIG_NL80211_TESTMODE
@@ -599,6 +599,17 @@
*
* @NL80211_CMD_SET_WDS_PEER: Set the MAC address of the peer on a WDS interface.
*
+ * @NL80211_CMD_SET_MULTICAST_TO_UNICAST: Configure if this AP should perform
+ * multicast to unicast conversion. When enabled, all multicast packets
+ * with ethertype ARP, IPv4 or IPv6 (possibly within an 802.1q header)
+ * will be sent out to each station once with the destination (multicast)
+ * mac address replaced by the stations mac address.
+ * This can only be toggled per BSS. Configure this on an interface of
+ * type %NL80211_IFTYPE_AP. It applies to all its vlans interfaces
+ * (%NL80211_IFTYPE_AP_VLAN), except for those in 4addr (WDS) mode.
+ * If %NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED is not present with this
+ * command, the feature is disabled.
+ *
* @NL80211_CMD_JOIN_MESH: Join a mesh. The mesh ID must be given, and initial
* mesh config parameters may be given.
* @NL80211_CMD_LEAVE_MESH: Leave the mesh network -- no special arguments, the
@@ -1026,6 +1037,8 @@ enum nl80211_commands {
NL80211_CMD_ABORT_SCAN,
+ NL80211_CMD_SET_MULTICAST_TO_UNICAST,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -1867,6 +1880,9 @@ enum nl80211_commands {
* @NL80211_ATTR_MESH_PEER_AID: Association ID for the mesh peer (u16). This is
* used to pull the stored data for mesh peer in power save state.
*
+ * @NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED: Multicast packets should be
+ * send out as unicast to all stations.
+ *
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@@ -2261,6 +2277,8 @@ enum nl80211_attrs {
NL80211_ATTR_MESH_PEER_AID,
+ NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -409,6 +409,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
.len = VHT_MUMIMO_GROUPS_DATA_LEN
},
[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
+ [NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED] = { .type = NLA_FLAG, },
};
/* policy for the key attributes */
@@ -1538,6 +1539,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
goto nla_put_failure;
}
CMD(set_wds_peer, SET_WDS_PEER);
+ CMD(set_multicast_to_unicast, SET_MULTICAST_TO_UNICAST);
if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
CMD(tdls_mgmt, TDLS_MGMT);
CMD(tdls_oper, TDLS_OPER);
@@ -2164,6 +2166,32 @@ static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
return rdev_set_wds_peer(rdev, dev, bssid);
}
+static int nl80211_set_multicast_to_unicast(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ const struct nlattr *nla;
+ bool enabled;
+
+ if (!info->attrs[NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED])
+ return -EINVAL;
+
+ if (netif_running(dev))
+ return -EBUSY;
+
+ if (!rdev->ops->set_multicast_to_unicast)
+ return -EOPNOTSUPP;
+
+ if (wdev->iftype != NL80211_IFTYPE_AP)
+ return -EOPNOTSUPP;
+
+ nla = info->attrs[NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED];
+ enabled = nla_get_flag(nla);
+ return rdev_set_multicast_to_unicast(rdev, dev, enabled);
+}
+
static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *rdev;
@@ -11574,6 +11602,14 @@ static const struct genl_ops nl80211_ops[] = {
NL80211_FLAG_NEED_RTNL,
},
{
+ .cmd = NL80211_CMD_SET_MULTICAST_TO_UNICAST,
+ .doit = nl80211_set_multicast_to_unicast,
+ .policy = nl80211_policy,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .internal_flags = NL80211_FLAG_NEED_NETDEV |
+ NL80211_FLAG_NEED_RTNL,
+ },
+ {
.cmd = NL80211_CMD_JOIN_MESH,
.doit = nl80211_join_mesh,
.policy = nl80211_policy,
@@ -562,6 +562,18 @@ static inline int rdev_set_wds_peer(struct cfg80211_registered_device *rdev,
return ret;
}
+static inline int
+rdev_set_multicast_to_unicast(struct cfg80211_registered_device *rdev,
+ struct net_device *dev,
+ const bool enabled)
+{
+ int ret;
+ trace_rdev_set_multicast_to_unicast(&rdev->wiphy, dev, enabled);
+ ret = rdev->ops->set_multicast_to_unicast(&rdev->wiphy, dev, enabled);
+ trace_rdev_return_int(&rdev->wiphy, ret);
+ return ret;
+}
+
static inline void rdev_rfkill_poll(struct cfg80211_registered_device *rdev)
{
trace_rdev_rfkill_poll(&rdev->wiphy);
@@ -2940,6 +2940,25 @@ DEFINE_EVENT(wiphy_wdev_evt, rdev_abort_scan,
TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev),
TP_ARGS(wiphy, wdev)
);
+
+TRACE_EVENT(rdev_set_multicast_to_unicast,
+ TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
+ const bool enabled),
+ TP_ARGS(wiphy, netdev, enabled),
+ TP_STRUCT__entry(
+ WIPHY_ENTRY
+ NETDEV_ENTRY
+ __field(bool, enabled)
+ ),
+ TP_fast_assign(
+ WIPHY_ASSIGN;
+ NETDEV_ASSIGN;
+ __entry->enabled = enabled;
+ ),
+ TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", unicast: %s",
+ WIPHY_PR_ARG, NETDEV_PR_ARG,
+ BOOL_TO_STR(__entry->enabled))
+);
#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
#undef TRACE_INCLUDE_PATH
This add a userspace toggle to configure multicast to unicast. Signed-off-by: Michael Braun <michael-dev@fami-braun.de> -- v6: - clarify documentation - fix policy for NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED --- include/net/cfg80211.h | 6 ++++++ include/uapi/linux/nl80211.h | 18 ++++++++++++++++++ net/wireless/nl80211.c | 36 ++++++++++++++++++++++++++++++++++++ net/wireless/rdev-ops.h | 12 ++++++++++++ net/wireless/trace.h | 19 +++++++++++++++++++ 5 files changed, 91 insertions(+)