[source] hostapd: set mcast_rate in mesh mode

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/43f66943d0dbf0ed0ec2a9cb071d0fbded2fbe35

commit 43f66943d0dbf0ed0ec2a9cb071d0fbded2fbe35
Author: Sven Eckelmann <sven.eckelmann at openmesh.com>
AuthorDate: Thu May 11 08:56:50 2017 +0200

    hostapd: set mcast_rate in mesh mode
    
    The wpa_supplicant code for IBSS allows to set the mcast rate. It is
    recommended to increase this value from 1 or 6 Mbit/s to something higher
    when using a mesh protocol on top which uses the multicast packet loss as
    indicator for the link quality.
    
    This setting was unfortunately not applied for mesh mode. But it would be
    beneficial when wpa_supplicant would behave similar to IBSS mode and set
    this argument during mesh join like authsae already does. At least it is
    helpful for companies/projects which are currently switching to 802.11s
    (without mesh_fwding and with mesh_ttl set to 1) as replacement for IBSS
    because newer drivers seem to support 802.11s but not IBSS anymore.
    
    Signed-off-by: Sven Eckelmann <sven.eckelmann at openmesh.com>
    Tested-by: Simon Wunderlich <simon.wunderlich at openmesh.com>
    Signed-off-by: Felix Fietkau <nbd at nbd.name> [refresh]
---
 .../patches/463-add-mcast_rate-to-11s.patch        | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/package/network/services/hostapd/patches/463-add-mcast_rate-to-11s.patch b/package/network/services/hostapd/patches/463-add-mcast_rate-to-11s.patch
new file mode 100644
index 0000000..da146ba
--- /dev/null
+++ b/package/network/services/hostapd/patches/463-add-mcast_rate-to-11s.patch
@@ -0,0 +1,68 @@
+From: Sven Eckelmann <sven.eckelmann at openmesh.com>
+Date: Thu, 11 May 2017 08:21:45 +0200
+Subject: [PATCH] set mcast_rate in mesh mode
+
+The wpa_supplicant code for IBSS allows to set the mcast rate. It is
+recommended to increase this value from 1 or 6 Mbit/s to something higher
+when using a mesh protocol on top which uses the multicast packet loss as
+indicator for the link quality.
+
+This setting was unfortunately not applied for mesh mode. But it would be
+beneficial when wpa_supplicant would behave similar to IBSS mode and set
+this argument during mesh join like authsae already does. At least it is
+helpful for companies/projects which are currently switching to 802.11s
+(without mesh_fwding and with mesh_ttl set to 1) as replacement for IBSS
+because newer drivers seem to support 802.11s but not IBSS anymore.
+
+Signed-off-by: Sven Eckelmann <sven.eckelmann at openmesh.com>
+Tested-by: Simon Wunderlich <simon.wunderlich at openmesh.com>
+
+--- a/src/drivers/driver.h
++++ b/src/drivers/driver.h
+@@ -1426,6 +1426,7 @@ struct wpa_driver_mesh_join_params {
+ #define WPA_DRIVER_MESH_FLAG_SAE_AUTH	0x00000004
+ #define WPA_DRIVER_MESH_FLAG_AMPE	0x00000008
+ 	unsigned int flags;
++	int mcast_rate;
+ };
+ 
+ /**
+--- a/src/drivers/driver_nl80211.c
++++ b/src/drivers/driver_nl80211.c
+@@ -8997,6 +8997,18 @@ static int nl80211_put_mesh_id(struct nl
+ }
+ 
+ 
++static int nl80211_put_mcast_rate(struct nl_msg *msg, int mcast_rate)
++{
++	if (mcast_rate > 0) {
++		wpa_printf(MSG_DEBUG, "  * mcast_rate=%.1f",
++			   (double)mcast_rate / 10);
++		return nla_put_u32(msg, NL80211_ATTR_MCAST_RATE, mcast_rate);
++	}
++
++	return 0;
++}
++
++
+ static int nl80211_put_mesh_config(struct nl_msg *msg,
+ 				   struct wpa_driver_mesh_bss_params *params)
+ {
+@@ -9055,6 +9067,7 @@ static int nl80211_join_mesh(struct i802
+ 	    nl80211_put_basic_rates(msg, params->basic_rates) ||
+ 	    nl80211_put_mesh_id(msg, params->meshid, params->meshid_len) ||
+ 	    nl80211_put_beacon_int(msg, params->beacon_int) ||
++	    nl80211_put_mcast_rate(msg, params->mcast_rate) ||
+ 	    nl80211_put_dtim_period(msg, params->dtim_period))
+ 		goto fail;
+ 
+--- a/wpa_supplicant/mesh.c
++++ b/wpa_supplicant/mesh.c
+@@ -379,6 +379,7 @@ int wpa_supplicant_join_mesh(struct wpa_
+ 	os_memset(&params, 0, sizeof(params));
+ 	params.meshid = ssid->ssid;
+ 	params.meshid_len = ssid->ssid_len;
++	params.mcast_rate = ssid->mcast_rate;
+ 	ibss_mesh_setup_freq(wpa_s, ssid, &params.freq);
+ 	wpa_s->mesh_ht_enabled = !!params.freq.ht_enabled;
+ 	wpa_s->mesh_vht_enabled = !!params.freq.vht_enabled;