[Add script to ease sync from OpenWRT]
[Description]
Add script to ease sync from OpenWRT
1. cover mac80211/mt76/firmware sync
[Release-log]
N/A
diff --git a/recipes-connectivity/hostapd/files/patches/011-mesh-use-deterministic-channel-on-channel-switch.patch b/recipes-connectivity/hostapd/files/patches/011-mesh-use-deterministic-channel-on-channel-switch.patch
new file mode 100644
index 0000000..1faeacf
--- /dev/null
+++ b/recipes-connectivity/hostapd/files/patches/011-mesh-use-deterministic-channel-on-channel-switch.patch
@@ -0,0 +1,81 @@
+From fc8ea40f6130ac18d9c66797de2cf1d5af55d496 Mon Sep 17 00:00:00 2001
+From: Markus Theil <markus.theil@tu-ilmenau.de>
+Date: Tue, 30 Jun 2020 14:19:07 +0200
+Subject: [PATCH 19/19] mesh: use deterministic channel on channel switch
+
+This patch uses a deterministic channel on DFS channel switch
+in mesh networks. Otherwise, when switching to a usable but not
+available channel, no CSA can be sent and a random channel is choosen
+without notification of other nodes. It is then quite likely, that
+the mesh network gets disconnected.
+
+Fix this by using a deterministic number, based on the sha256 hash
+of the mesh ID, in order to use at least a different number in each
+mesh network.
+
+Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>
+---
+ src/ap/dfs.c | 20 +++++++++++++++++++-
+ src/drivers/driver_nl80211.c | 4 ++++
+ 2 files changed, 23 insertions(+), 1 deletion(-)
+
+--- a/src/ap/dfs.c
++++ b/src/ap/dfs.c
+@@ -17,6 +17,7 @@
+ #include "ap_drv_ops.h"
+ #include "drivers/driver.h"
+ #include "dfs.h"
++#include "crypto/crypto.h"
+
+
+ static int dfs_get_used_n_chans(struct hostapd_iface *iface, int *seg1)
+@@ -483,9 +484,14 @@ dfs_get_valid_channel(struct hostapd_ifa
+ int num_available_chandefs;
+ int chan_idx, chan_idx2;
+ int sec_chan_idx_80p80 = -1;
++ bool is_mesh = false;
+ int i;
+ u32 _rand;
+
++#ifdef CONFIG_MESH
++ is_mesh = iface->mconf;
++#endif
++
+ wpa_printf(MSG_DEBUG, "DFS: Selecting random channel");
+ *secondary_channel = 0;
+ *oper_centr_freq_seg0_idx = 0;
+@@ -505,8 +511,20 @@ dfs_get_valid_channel(struct hostapd_ifa
+ if (num_available_chandefs == 0)
+ return NULL;
+
+- if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
++ /* try to use deterministic channel in mesh, so that both sides
++ * have a chance to switch to the same channel */
++ if (is_mesh) {
++#ifdef CONFIG_MESH
++ u64 hash[4];
++ const u8 *meshid[1] = { &iface->mconf->meshid[0] };
++ const size_t meshid_len = iface->mconf->meshid_len;
++
++ sha256_vector(1, meshid, &meshid_len, (u8 *)&hash[0]);
++ _rand = hash[0] + hash[1] + hash[2] + hash[3];
++#endif
++ } else if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
+ return NULL;
++
+ chan_idx = _rand % num_available_chandefs;
+ dfs_find_channel(iface, &chan, chan_idx, skip_radar);
+ if (!chan) {
+--- a/src/drivers/driver_nl80211.c
++++ b/src/drivers/driver_nl80211.c
+@@ -9895,6 +9895,10 @@ static int nl80211_switch_channel(void *
+ if (ret)
+ goto error;
+
++ if (drv->nlmode == NL80211_IFTYPE_MESH_POINT) {
++ nla_put_flag(msg, NL80211_ATTR_HANDLE_DFS);
++ }
++
+ /* beacon_csa params */
+ beacon_csa = nla_nest_start(msg, NL80211_ATTR_CSA_IES);
+ if (!beacon_csa)