Developing lightweight computation at the DSG edge

qmp_common.sh 6.96 KB
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#!/bin/sh
#    Copyright (C) 2011 Fundacio Privada per a la Xarxa Oberta, Lliure i Neutral guifi.net
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License along
#    with this program; if not, write to the Free Software Foundation, Inc.,
#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#    The full GNU General Public License is included in this distribution in
#    the file called "COPYING".
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#
# Contributors:
#	Simó Albert i Beltran
#

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SOURCE_COMMON=1
#DEBUG="/tmp/qmp_common.debug"

#######################
# UCI related commands
#######################

qmp_uci_get() {
	u="$(uci -q get qmp.$1)"
	r=$?
	echo "$u"
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci get qmp.$1)"
	qmp_debug "qmp_uci_get: uci -q get qmp.$1"
	return $r
}

qmp_uci_get_raw() {
	u="$(uci -q get $@)"
	r=$?
	echo "$u"
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci get $@)"
	qmp_debug "qmp_uci_get_raw: uci -q get $@"
	return $r
}

qmp_uci_set() {
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	section="$1"
	shift
	uci -q set qmp.$section="$@" > /dev/null
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	r=$?
	uci commit
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci set qmp.$1=$2)"
	qmp_debug "qmp_uci_set: uci -q set qmp.$1=$2"
	return $r
}

qmp_uci_set_raw() {
	uci -q set $@ > /dev/null
	r=$?
	uci commit
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci set $@)"
	qmp_debug "qmp_uci_set_raw: uci -q set $@"
        return $r
}

qmp_uci_del() {
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	uci -q delete qmp.$1
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	r=$?
	uci commit
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci del qmp.$1)"
	qmp_debug "qmp_uci_del: uci -q del qmp.$1"
	return $r
}

qmp_uci_del_raw() {
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        uci -q delete $@
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	r=$?
	uci commit
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci del $@)"
	qmp_debug "qmp_uci_del_raw uci -q del $@"
	return $r
}

qmp_uci_add() {
	uci -q add qmp $1 > /dev/null
	r=$?
	uci commit
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci add qmp $1)"
	qmp_debug "qmp_uci_add: uci -q add qmp $1"
	return $r
}

qmp_uci_add_raw_get_cfg() {
	cfg=$(uci -q add $@)
	r=$?
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci add $@)"
	echo "$cfg"
	qmp_debug "qmp_uci_add_raw_get_cfg: uci -q add $@"
	return $r
}

qmp_uci_set_cfg() {
	uci -q set $@ >/dev/null
	qmp_debug "qmp_uci_set_cfg: uci -q set $@"
	return $?
}

qmp_uci_commit() {
	uci commit $1
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci commit $1)"
	qmp_debug "qmp_uci_commit: uci commit $1"
	return $r
}

qmp_uci_add_raw() {
	uci -q add $@ > /dev/null
	r=$?
	uci commit
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci add $@)"
	qmp_debug "qmp_uci_add_raw: uci -q add $@"
	return $r
}

qmp_uci_add_list_raw() {
	uci -q add_list $@ > /dev/null
	r=$?
	uci commit
	r=$(( $r + $? ))
	[ $r -ne 0 ] && logger -t qMp "UCI returned an error (uci add_list $@)"
	qmp_debug "qmp_uci_add_list_raw: uci -q add_list $@"
	return $r
}

qmp_uci_import() {
	cat "$1" | while read v; do
	[ ! -z "$v" ] && { uci set $v; qmp_debug "qmp_uci_import: uci set $v"; }
	done
	uci commit
	return $?
}

qmp_uci_test() {
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	option=$@
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	u="$(uci get $option > /dev/null 2>&1)"
	r=$?
	return $r
}

##################################
# Log and errors related commnads
##################################

# Exit from execution and shows an error
# qmp_error The device is burning
qmp_error() {
	logger -s -t qMp "ERROR: $@"
	exit 1
}

# Send info to system log
# qmp_log qMp is the best
qmp_log() {
	logger -s -t qMp "$@"
}

qmp_debug() {
	[ ! -z "$DEBUG" ] &&  echo "$@" >> $DEBUG
}

#######################################
# Networking and Wifi related commands
#######################################

# Returns the names of the wifi devices from the system
qmp_get_wifi_devices() {
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	awk 'NR>2 { gsub(/:$/,"",$1); print $1 }' /proc/net/wireless | grep -v -e "wlan[0-9]-[0-9]"
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}

# Returns the MAC address of the wifi devices
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# (get MAC addres of the physical wifi device, if exists)
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qmp_get_wifi_mac_devices() {
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	for device in $(qmp_get_wifi_devices)
	do
		if [ -s "/sys/class/net/$device/phy80211/macaddress" ]
		then
			cat "/sys/class/net/$device/phy80211/macaddress"
		else
			qmp_get_mac_for_dev $device
		fi
	done
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}

# Returns the device name that corresponds to the MAC address
# qmp_get_dev_from_mac 00:22:11:33:44:55
qmp_get_dev_from_mac() {
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	echo "$(ip link | grep $1 -i -B1 | grep -v \@ | egrep -v "ether|mon" | grep mtu | awk '{print $2}' | tr -d : | awk NR==1)"
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}

# Returns the mac address of the device
# qmp_get_mac_for_dev eth0
qmp_get_mac_for_dev() {
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	mac="$(cat /sys/class/net/$1/address)"
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	[ -z "$mac" ] && mac="00:00:00:00:00:00"
	echo "$mac"
}

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# Returns the mac addres for specific device,, only wifi devs are allowed. Useful when eth and wlan have same MAC
# qmp_get_dev_from_wifi_mac 00:22:11:33:44:55
qmp_get_dev_from_wifi_mac() {
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	for device in $(qmp_get_wifi_devices | sort)
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	do
		if grep -q -i "^$1$" "/sys/class/net/$device/phy80211/macaddress" "/sys/class/net/$device/address" 2> /dev/null
		then
			echo $device
			return
		fi
	done
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}

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#########################
# Hooks related functions
#########################

qmp_hooks_exec() {
    local stage="$1"
    local device="$(cat /tmp/sysinfo/board_name)"
    [ -z "$stage" -o -z "$device" ] && return 1
    local hooksdir="/etc/qmp/hooks/$device"

    [ -d "$hooksdir" ] && {
    for h in $hooksdir/*; do
        echo "Executing hook $h in stage $stage"
        sh $h $stage
    done
    }
}


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#########################
# Other kind of commands
#########################

# Print the content of the parameters in reverse order (separed by spaces)
qmp_reverse_order() {
	echo "$@" | awk '{for (i=NF; i>0; i--) printf("%s ",$i);print ""}'
}

# Print the output of the command parameter in reverse order (separed by lines)
qmp_tac() {
	$@ | awk '{a[NR]=$0} END {for(i=NR;i>0;i--)print a[i]}'
}

qmp_get_dec_node_id() {
  PRIMARY_MESH_DEVICE="$(uci get qmp.interfaces.mesh_devices | awk '{print $1}')"
  LSB_PRIM_MAC="$( qmp_get_mac_for_dev $PRIMARY_MESH_DEVICE | awk -F':' '{print $6}' )"

  if qmp_uci_test qmp.node.community_node_id; then
    COMMUNITY_NODE_ID="$(uci get qmp.node.community_node_id)"
  elif ! [ -z "$PRIMARY_MESH_DEVICE" ] ; then
    COMMUNITY_NODE_ID=$LSB_PRIM_MAC
  fi
  echo $(printf %d 0x$COMMUNITY_NODE_ID)
}

# Returns the prefix /XX from netmask
qmp_get_prefix_from_netmask() {
 echo "$(ipcalc.sh 1.1.1.1 $1| grep PREFIX | cut -d= -f2)"
}

# Returns the netid from IP NETMASK
qmp_get_netid_from_network() {
 echo "$(ipcalc.sh $1 $2 | grep NETWORK | cut -d= -f2)"
}