Add support for injecting packets to a given mesh peer, bypassing the
mpath table lookup using PROBE_MESH_LINK command.
This helps to send data frames over unexcersized direct mesh path, which
is not selected as next_hop node. This can be helpful in measuring link
metrics.
Signed-off-by: Pradeep Kumar Chitrapu <pradeepc@xxxxxxxxxxxxxx>
---
src/drivers/driver.h | 11 +++++++++++
src/drivers/driver_nl80211.c | 34 +++++++++++++++++++++++++++++++++-
2 files changed, 44 insertions(+), 1 deletion(-)
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index 0acc0958aefb..dec401677eb5 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -3982,6 +3982,17 @@ struct wpa_driver_ops {
int (*leave_mesh)(void *priv);
/**
+ * probe_mesh_link - inject an ethernet packet over direct mesh link to given
+ * peer skipping the next_hop lookup from mpath table.
+ * @priv: Private driver interface data
+ * @addr: peer mac address
+ * @eth: ethernet frame to be sent.
+ * @len: ethrnet frame len
+ * Returns 0 on success, -1 on failure
+ */
+
+ int (*probe_mesh_link)(void *priv, const u8 *addr, const u8 *eth, size_t len);
+ /**
* do_acs - Automatically select channel
* @priv: Private driver interface data
* @params: Parameters for ACS
diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index ef37c8bcdfec..b83ae8af1981 100644
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -22,6 +22,7 @@
#include <linux/rtnetlink.h>
#include <netpacket/packet.h>
#include <linux/errqueue.h>
+#include <net/ethernet.h>
#include "common.h"
#include "eloop.h"
@@ -9626,8 +9627,38 @@ static int wpa_driver_nl80211_leave_mesh(void *priv)
return ret;
}
-#endif /* CONFIG_MESH */
+static int wpa_driver_nl80211_probe_mesh_link(void *priv, const u8 *addr,
+ const u8 *eth, size_t len)
+{
+ struct i802_bss *bss = priv;
+ struct wpa_driver_nl80211_data *drv = bss->drv;
+ struct nl_msg *msg;
+ int ret;
+
+ msg = nl80211_drv_msg(drv, 0, NL80211_CMD_PROBE_MESH_LINK);
+
+ if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_PROBE_MESH_LINK)) ||
+ nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
+ nla_put(msg, NL80211_ATTR_FRAME, len, eth))
+ goto fail;
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ if (ret) {
+ wpa_printf(MSG_DEBUG, "nl80211: mesh link probe failed: ret=%d (%s)",
+ ret, strerror(-ret));
+ } else {
+ wpa_printf(MSG_DEBUG, "nl80211: mesh link probed successfully");
+ }
+
+ return ret;
+
+fail:
+ nlmsg_free(msg);
+ return -ENOBUFS;
+}
+
+#endif /* CONFIG_MESH */
static int wpa_driver_br_add_ip_neigh(void *priv, u8 version,
const u8 *ipaddr, int prefixlen,
@@ -10971,6 +11002,7 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
.init_mesh = wpa_driver_nl80211_init_mesh,
.join_mesh = wpa_driver_nl80211_join_mesh,
.leave_mesh = wpa_driver_nl80211_leave_mesh,
+ .probe_mesh_link = wpa_driver_nl80211_probe_mesh_link,
#endif /* CONFIG_MESH */
.br_add_ip_neigh = wpa_driver_br_add_ip_neigh,
.br_delete_ip_neigh = wpa_driver_br_delete_ip_neigh,
--
1.9.1
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