From 360768aa10894bb704334d583030892a38e3623b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karsten=20B=C3=B6ddeker?= <freifunk@kb-light.de>
Date: Mon, 18 Jul 2016 16:34:13 +0200
Subject: [PATCH] ffho-ath9k-blackout-workaround: new package
---
ffho/ffho-ath9k-blackout-workaround/LICENSE | 22 ++++++
ffho/ffho-ath9k-blackout-workaround/Makefile | 43 +++++++++++
ffho/ffho-ath9k-blackout-workaround/ReadMe.md | 29 ++++++++
.../check_site.lua | 3 +
.../iface/90-ath9k-blackout-workaround | 15 ++++
.../upgrade/900-ath9k-blackout-workaround | 10 +++
.../files/usr/sbin/ath9k-blackout-workaround | 74 +++++++++++++++++++
7 files changed, 196 insertions(+)
create mode 100644 ffho/ffho-ath9k-blackout-workaround/LICENSE
create mode 100644 ffho/ffho-ath9k-blackout-workaround/Makefile
create mode 100644 ffho/ffho-ath9k-blackout-workaround/ReadMe.md
create mode 100644 ffho/ffho-ath9k-blackout-workaround/check_site.lua
create mode 100644 ffho/ffho-ath9k-blackout-workaround/files/etc/hotplug.d/iface/90-ath9k-blackout-workaround
create mode 100755 ffho/ffho-ath9k-blackout-workaround/files/lib/gluon/upgrade/900-ath9k-blackout-workaround
create mode 100755 ffho/ffho-ath9k-blackout-workaround/files/usr/sbin/ath9k-blackout-workaround
diff --git a/ffho/ffho-ath9k-blackout-workaround/LICENSE b/ffho/ffho-ath9k-blackout-workaround/LICENSE
new file mode 100644
index 0000000..29f26e8
--- /dev/null
+++ b/ffho/ffho-ath9k-blackout-workaround/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2016, Karsten Böddeker <freifunk@kb-light.de>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/ffho/ffho-ath9k-blackout-workaround/Makefile b/ffho/ffho-ath9k-blackout-workaround/Makefile
new file mode 100644
index 0000000..762739c
--- /dev/null
+++ b/ffho/ffho-ath9k-blackout-workaround/Makefile
@@ -0,0 +1,43 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ffho-ath9k-blackout-workaround
+PKG_VERSION:=1
+PKG_RELEASE:=$(GLUON_VERSION).$(GLUON_SITE_CODE)-$(GLUON_RELEASE).$(GLUON_CONFIG_VERSION)
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/ffho-ath9k-blackout-workaround
+ SECTION:=ffho
+ CATEGORY:=Workarounds
+ TITLE:=ATH9K-Blackout workaround
+ DEPENDS:=+gluon-core +micrond
+ MAINTAINER:=Freifunk Hochstift <kontakt@hochstift.freifunk.net>
+ URL:=https://git.c3pb.de/freifunk-pb/ffho-packages
+endef
+
+define Package/ffho-ath9k-blackout-workaround/description
+ Restartes the wifi if possible blckout is detected.
+endef
+
+define Build/Prepare
+ mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+endef
+
+define Package/ffho-ath9k-blackout-workaround/install
+ $(CP) ./files/* $(1)/
+endef
+
+define Package/ffho-ath9k-blackout-workaround/postinst
+#!/bin/sh
+$(call GluonCheckSite,check_site.lua)
+endef
+
+$(eval $(call BuildPackage,ffho-ath9k-blackout-workaround))
diff --git a/ffho/ffho-ath9k-blackout-workaround/ReadMe.md b/ffho/ffho-ath9k-blackout-workaround/ReadMe.md
new file mode 100644
index 0000000..f848c40
--- /dev/null
+++ b/ffho/ffho-ath9k-blackout-workaround/ReadMe.md
@@ -0,0 +1,29 @@
+ffho-ath9k-blackout-workaround
+==============================
+
+In order to avoid further WiFi-Blackouts that *might* be caused by buggy ath9k,
+we try to detect problems and restart the wifi.
+
+site.conf
+---------
+
+**ath9k-workaround.blackout_wait:**
+- minimum delay to detect a possible blackout as blackout
+
+**ath9k-workaround.reset_wait:**
+- minimum delay between reset
+
+**ath9k-workaround.step_size**
+- execute the cronjob each x minutes
+
+### example
+```lua
+{
+ ath9k-workaround = {
+ blackout_wait = 720,
+ reset_wait = 1440,
+ step_size = 10,
+ },
+ ...
+},
+```
diff --git a/ffho/ffho-ath9k-blackout-workaround/check_site.lua b/ffho/ffho-ath9k-blackout-workaround/check_site.lua
new file mode 100644
index 0000000..507bee1
--- /dev/null
+++ b/ffho/ffho-ath9k-blackout-workaround/check_site.lua
@@ -0,0 +1,3 @@
+need_number('ath9k_workaround.blackout_wait')
+need_number('ath9k_workaround.reset_wait')
+need_number('ath9k_workaround.step_size')
diff --git a/ffho/ffho-ath9k-blackout-workaround/files/etc/hotplug.d/iface/90-ath9k-blackout-workaround b/ffho/ffho-ath9k-blackout-workaround/files/etc/hotplug.d/iface/90-ath9k-blackout-workaround
new file mode 100644
index 0000000..2a62d5a
--- /dev/null
+++ b/ffho/ffho-ath9k-blackout-workaround/files/etc/hotplug.d/iface/90-ath9k-blackout-workaround
@@ -0,0 +1,15 @@
+#!/bin/sh
+[[ "${ACTION}" != "ifup" ]] && exit 0;
+
+. /lib/functions.sh
+config_load "wireless"
+
+local RADIO
+config_get RADIO ${INTERFACE} device
+[[ -z ${RADIO} ]] && exit 0;
+
+local HWMODE
+config_get HWMODE ${RADIO} hwmode
+[[ "${HWMODE}" != "11g" ]] && exit 0;
+
+date +%s > /tmp/ath9k-reset
diff --git a/ffho/ffho-ath9k-blackout-workaround/files/lib/gluon/upgrade/900-ath9k-blackout-workaround b/ffho/ffho-ath9k-blackout-workaround/files/lib/gluon/upgrade/900-ath9k-blackout-workaround
new file mode 100755
index 0000000..2931301
--- /dev/null
+++ b/ffho/ffho-ath9k-blackout-workaround/files/lib/gluon/upgrade/900-ath9k-blackout-workaround
@@ -0,0 +1,10 @@
+#!/usr/bin/lua
+
+local fs = require 'nixio.fs'
+local site = require 'gluon.site_config'
+
+local step_size = site.ath9k-workaround.step_size
+
+local f = io.open('/usr/lib/micron.d/ath9k-blackout-workaround', 'w')
+f:write(string.format('*/%i * * * * /usr/sbin/ath9k-blackout-workaround\n', step_size))
+f:close()
diff --git a/ffho/ffho-ath9k-blackout-workaround/files/usr/sbin/ath9k-blackout-workaround b/ffho/ffho-ath9k-blackout-workaround/files/usr/sbin/ath9k-blackout-workaround
new file mode 100755
index 0000000..53cf71b
--- /dev/null
+++ b/ffho/ffho-ath9k-blackout-workaround/files/usr/sbin/ath9k-blackout-workaround
@@ -0,0 +1,74 @@
+#!/usr/bin/lua
+local fs = require('nixio.fs')
+local uci = require('luci.model.uci').cursor()
+local iwinfo = require "iwinfo"
+local site = require 'gluon.site_config'
+
+local fileOk="/tmp/ath9k-ok"
+local fileReset="/tmp/ath9k-reset"
+
+function time2file (file)
+ local f = io.open(file, 'w')
+ f:write(string.format('%i', os.time()))
+ f:close()
+end
+
+function devOk (iface)
+ local data = uci:get_all('wireless', iface)
+ if data.disabled then
+ return null
+ end
+ local radio = uci:get_all('wireless', data.radio)
+ if not radio.hwmode == '11g' or radio.disabled then
+ return null
+ end
+ local wifitype = iwinfo.type(data.radio)
+ local iw = iwinfo[wifitype]
+ if iw.assoclist(iface) then
+ return true
+ end
+ return false
+end
+
+function check_wifi()
+ local ifaces = {}
+ uci:foreach('wireless', 'wifi-iface',
+ function(s)
+ table.insert(ifaces, s['.name'])
+ end
+ )
+ local blackout = false
+ for _, iface in ipairs(ifaces) do
+ local tmp = devOk(iface)
+ if tmp then
+ return true
+ elseif tmp == false then
+ blackout = true
+ end
+ end
+ return not blackout
+end
+
+if not fs.readfile(fileReset) then
+ time2file(fileReset)
+end
+
+if check_wifi() or not fs.readfile(fileOk) then
+ time2file(fileOk)
+ os.exit(0)
+end
+
+local blackout_wait_secs = site.ath9k-workaround.blackout_wait *60
+local reset_wait_secs = site.ath9k-workaround.reset_wait *60
+
+if os.difftime(os.time(), tonumber(fs.readfile(fileReset))) <= reset_wait_secs then
+ os.exit(0)
+end
+
+if os.difftime(os.time(), tonumber(fs.readfile(fileOk))) <= blackout_wait_secs then
+ os.exit(0)
+end
+
+io.popen('logger -s -t ath9k-blackout-workaround -p local0.info "blackout detected, resart wifi"')
+time2file(fileReset)
+os.execute("wifi")
--
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