[people/arne_f/network.git] / functions.device

#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2010  Michael Tremer & Christian Schmidt                      #
#                                                                             #
# 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 3 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, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

function devicify() {
	local device=${1}

	assert isset device

	if device_exists ${device}; then
		echo "${device}"
		return ${EXIT_OK}
	fi

	local d
	for d in $(devices_get_all); do
		if [ "$(device_get_address ${d})" = "${device}" ]; then
			echo "${d}"
			return ${EXIT_OK}
		fi
	done

	return ${EXIT_ERROR}
}

function macify() {
	local device=${1}

	assert isset device

	if mac_is_valid ${device}; then
		echo "${device}"
		return ${EXIT_OK}
	fi

	if device_exists ${device}; then
		device_get_address ${device}
		return ${EXIT_OK}
	fi

	return ${EXIT_ERROR}
}

# Check if the device exists
function device_exists() {
	local device=${1}

	# If device name was not found, exit.
	[ -n "${device}" ] || return ${EXIT_ERROR}

	[ -d "${SYS_CLASS_NET}/${device}" ]
}

# Check if the device is up
function device_is_up() {
	local device=${1}

	device_exists ${device} || return ${EXIT_ERROR}

	ip link show ${device} 2>/dev/null | grep -qE "<.*UP.*>"
}

# Check if the device is a bonding device
function device_is_bonding() {
	[ -d "/sys/class/net/${1}/bonding" ]
}

# Check if the device bonded in a bonding device
function device_is_bonded() {
	local device=${1}

	[ -d "${SYS_CLASS_NET}/${device}/master" ]
}

# Check if the device is a bridge
function device_is_bridge() {
	[ -d "/sys/class/net/${1}/bridge" ]
}

function device_is_bridge_attached() {
	local device=${1}

	[ -d "${SYS_CLASS_NET}/${device}/brport" ]
}

# Check if the device is a virtual device
function device_is_virtual() {
	local device=${1}

	[ -e "/proc/net/vlan/${device}" ]
}

# Check if the device has virtual devices
function device_has_virtuals() {
	local device=${1}

	if device_is_virtual ${device}; then
		return 1
	fi

	if [ ! -e "/proc/net/vlan/config" ]; then
		return 1
	fi
	grep -q "${1}$" /proc/net/vlan/config
}

function device_is_vlan() { # XXX Compat function
	log DEBUG "Deprecated function device_is_vlan() was used."

	device_is_virtual $@
}

# Check if the device is a ppp device
function device_is_ppp() {
	local device=${1}

	ip link show ${device} 2>/dev/null | grep -qE "<.*POINTOPOINT.*>"
}

# Check if the device is a loopback device
function device_is_loopback() {
	local device=$(devicify ${1})
	[ "${device}" = "lo" ]
}

# Check if the device is a physical network interface
function device_is_real() {
	local device=${1}

	device_is_loopback ${device} && \
		return ${EXIT_ERROR}

	device_is_bonding ${device} &&  \
		return ${EXIT_ERROR}

	device_is_bridge ${device} && \
		return ${EXIT_ERROR}

	device_is_ppp ${device} && \
		return ${EXIT_ERROR}

	device_is_virtual ${device} && \
		return ${EXIT_ERROR}

	return ${EXIT_OK}
}

# Get the device type
function device_get_type() {
	local device=$(devicify ${1})

	if device_is_vlan ${device}; then
		echo "vlan"

	elif device_is_bonding ${device}; then
		echo "bonding"

	elif device_is_bridge ${device}; then
		echo "bridge"

	elif device_is_ppp ${device}; then
		echo "ppp"

	elif device_is_loopback ${device}; then
		echo "loopback"

	elif device_is_real ${device}; then
		echo "real"

	else
		echo "unknown"
	fi
}

function device_get_status() {
	local device=${1}

	assert isset device

	local status=${STATUS_UNKNOWN}

	if ! device_has_carrier ${device}; then
		status=${STATUS_NOCARRIER}
	elif device_is_up ${device}; then
		status=${STATUS_UP}
	elif device_is_down ${device}; then
		status=${STATUS_DOWN}
	fi

	assert isset status

	echo "${status}"
}

function device_get_address() {
	local device=${1}

	cat ${SYS_CLASS_NET}/${device}/address 2>/dev/null
}

function device_set_address() {
	local device=${1}
	local addr=${2}
	
	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	log INFO "Setting address of '${device}' to '${addr}' - was $(device_get_address ${device})."

	local up
	if device_is_up ${device}; then
		device_set_down ${device}
		up=1
	fi

	ip link set ${device} address ${addr}
	local ret=$?

	if [ "${up}" = "1" ]; then
		device_set_up ${device}
	fi

	if [ "${ret}" != "0" ]; then
		error_log "Could not set address '${addr}' on device '${device}'."
	fi

	return ${ret}
}

function device_get() {
	local from_config

	while [ $# -gt 0 ]; do
		case "${1}" in
			--from-config)
				from_config=1
				;;
			--no-config)
				from_config=0
				;;
		esac
		shift
	done

	local devices

	if [ "${from_config}" != "0" ]; then
		devices="${devices} $(device_config_list)"
	fi

	if [ "${from_config}" != "1" ]; then
		local device
		for device in ${SYS_CLASS_NET}/*; do
			devices="${devices} $(basename ${device})"
		done
	fi

	echo ${devices}
	return ${EXIT_OK}
}

function devices_get_all() {
	device_get
}

# Check if a device has a cable plugged in
function device_has_carrier() {
	local device=$(devicify ${1})
	[ "$(<${SYS_CLASS_NET}/${device}/carrier)" = "1" ]
}

function device_is_promisc() {
	local device=${1}

	ip link show ${device} | grep -qE "<.*PROMISC.*>"
}

# Check if the device is free
function device_is_free() {
	! device_is_used $@
}

# Check if the device is used
function device_is_used() {
	local device=$(devicify ${1})

	device_has_virtuals ${device} && \
		return ${EXIT_OK}
	device_is_bonded ${device} && \
		return ${EXIT_OK}
	device_is_bridge_attached ${device} && \
		return ${EXIT_OK}

	return ${EXIT_ERROR}
}

# XXX to be removed I think
function device_get_free() {
	local destination=${1}

	# Replace + by a valid number
	if grep -q "+$" <<<${destination}; then
		local number=0
		destination=$(sed -e "s/+//" <<<$destination)
		while [ "${number}" -le "100" ]; do
			if ! device_exists "${destination}${number}"; then
				destination="${destination}${number}"
				break
			fi
			number=$(($number + 1))
		done
	fi
	echo "${destination}"
}

function device_rename() {
	warning_log "Called deprecated function 'device_rename'"

	device_set_name $@
}

function device_hash() {
	local device=${1}

	# Get mac address of device and remove all colons (:)
	# that will result in a hash.
	device=$(macify ${device})

	echo "${device//:/}"
}

# Give the device a new name
function device_set_name() {
	local source=$1
	local destination=$(device_get_free ${2})

	# Check if devices exists
	if ! device_exists ${source} || device_exists ${destination}; then
		return 4
	fi

	local up
	if device_is_up ${source}; then
		ip link set ${source} down
		up=1
	fi

	ip link set ${source} name ${destination}

	if [ "${up}" = "1" ]; then
		ip link set ${destination} up
	fi
}

# Set device up
function device_set_up() {
	local device=$(devicify ${1})

	# Silently fail if device was not found
	[ -z "${device}" ] && return ${EXIT_ERROR}

	# Do nothing if device is already up
	device_is_up ${device} && return ${EXIT_OK}

	device_set_parent_up ${device}

	log DEBUG "Setting up device '${device}'"

	ip link set ${device} up
}

function device_set_parent_up() {
	local device=${1}
	local parent

	if device_is_virtual ${device}; then
		parent=$(device_virtual_get_parent ${device})

		device_is_up ${parent} && return ${EXIT_OK}

		log DEBUG "Setting up parent device '${parent}' of '${device}'"

		device_set_up ${parent}
		return $?
	fi

	return ${EXIT_OK}
}

# Set device down
function device_set_down() {
	local device=$(devicify ${1})

	local ret=${EXIT_OK}

	if device_is_up ${device}; then
		log DEBUG "Tearing down device '${device}'"

		ip link set ${device} down
		ret=$?
	fi

	device_set_parent_down ${device}

	return ${ret}
}

function device_set_parent_down() {
	local device=${1}
	local parent

	if device_is_virtual ${device}; then
		parent=$(device_virtual_get_parent ${device})

		device_is_up ${parent} || return ${EXIT_OK}

		if device_is_free ${parent}; then
			log DEBUG "Tearing down parent device '${parent}' of '${device}'"

			device_set_down ${parent}
		fi
	fi
	
	return ${EXIT_OK}
}

function device_get_mtu() {
	local device=${1}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	echo $(<${SYS_CLASS_NET}/${device}/mtu)
}

# Set mtu to a device
function device_set_mtu() {
	local device=${1}
	local mtu=${2}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi
	
	local oldmtu=$(device_get_mtu ${device})

	if [ "${oldmtu}" = "${mtu}" ]; then
		# No need to set mtu.
		return ${EXIT_OK}
	fi

	log INFO "Setting mtu of '${device}' to '${mtu}' - was ${oldmtu}."

	local up
	if device_is_up ${device}; then
		device_set_down ${device}
		up=1
	fi

	ip link set ${device} mtu ${mtu}
	local ret=$?

	if [ "${up}" = "1" ]; then
		device_set_up ${device}
	fi

	if [ "${ret}" != "0" ]; then
		error_log "Could not set mtu '${mtu}' on device '${device}'."
	fi

	return ${ret}
}

function device_discover() {
	local device=${1}

	log INFO "Running discovery process on device '${device}'."

	local hook
	for hook in $(hook_zone_get_all); do
		hook_zone_exec ${hook} discover ${device}
	done
}

function device_has_ipv4() {
	local device=${1}
	local addr=${2}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	ip addr show ${device} | grep -q -e "inet " -e "${addr}"
}

function device_has_ipv6() {
	local device=${1}
	local addr=${2}

	if ! device_exists ${device}; then
		error "Device '${device}' does not exist."
		return ${EXIT_ERROR}
	fi

	local prefix=${addr##*/}
	addr=$(ipv6_implode ${addr%%/*})

	if [ -n "${prefix}" ]; then
		addr="${addr}/${prefix}"
	fi

	ip addr show ${device} | grep -q "inet6 ${addr}"
}

function __device_get_file() {
	local device=${1}
	local file=${2}

	assert isset device
	assert isset file

	cat ${SYS_CLASS_NET}/${device}/${file}
}

function device_get_rx_bytes() {
	local device=${1}

	__device_get_file ${device} statistics/rx_bytes
}

function device_get_tx_bytes() {
	local device=${1}

	__device_get_file ${device} statistics/tx_bytes
}

function device_get_rx_packets() {
	local device=${1}

	__device_get_file ${device} statistics/rx_packets
}

function device_get_tx_packets() {
	local device=${1}

	__device_get_file ${device} statistics/tx_packets
}

function device_get_rx_errors() {
	local device=${1}

	__device_get_file ${device} statistics/rx_errors
}

function device_get_tx_errors() {
	local device=${1}

	__device_get_file ${device} statistics/tx_errors
}
Commit	Line	Data
1848564d MT	1	#!/bin/bash
	2	###############################################################################
	3	# #
	4	# IPFire.org - A linux based firewall #
	5	# Copyright (C) 2010 Michael Tremer & Christian Schmidt #
	6	# #
	7	# This program is free software: you can redistribute it and/or modify #
	8	# it under the terms of the GNU General Public License as published by #
	9	# the Free Software Foundation, either version 3 of the License, or #
	10	# (at your option) any later version. #
	11	# #
	12	# This program is distributed in the hope that it will be useful, #
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of #
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
	15	# GNU General Public License for more details. #
	16	# #
	17	# You should have received a copy of the GNU General Public License #
	18	# along with this program. If not, see <http://www.gnu.org/licenses/>. #
	19	# #
	20	###############################################################################
	21
1b7a1578	22	function devicify() {
1848564d MT	23	local device=${1}
1848564d MT	24
711ffac1 MT	25	assert isset device
711ffac1 MT	26
1848564d MT	27	if device_exists ${device}; then
	28	echo "${device}"
	29	return ${EXIT_OK}
	30	fi
	31
	32	local d
	33	for d in $(devices_get_all); do
	34	if [ "$(device_get_address ${d})" = "${device}" ]; then
	35	echo "${d}"
	36	return ${EXIT_OK}
	37	fi
	38	done
	39
	40	return ${EXIT_ERROR}
	41	}
	42
	43	function macify() {
	44	local device=${1}
	45
711ffac1 MT	46	assert isset device
711ffac1 MT	47
1848564d MT	48	if mac_is_valid ${device}; then
	49	echo "${device}"
	50	return ${EXIT_OK}
	51	fi
	52
	53	if device_exists ${device}; then
	54	device_get_address ${device}
	55	return ${EXIT_OK}
	56	fi
	57
	58	return ${EXIT_ERROR}
	59	}
	60
	61	# Check if the device exists
	62	function device_exists() {
	63	local device=${1}
	64
	65	# If device name was not found, exit.
	66	[ -n "${device}" ] \|\| return ${EXIT_ERROR}
	67
	68	[ -d "${SYS_CLASS_NET}/${device}" ]
	69	}
	70
	71	# Check if the device is up
	72	function device_is_up() {
	73	local device=${1}
	74
	75	device_exists ${device} \|\| return ${EXIT_ERROR}
	76
	77	ip link show ${device} 2>/dev/null \| grep -qE "<.UP.>"
	78	}
	79
	80	# Check if the device is a bonding device
	81	function device_is_bonding() {
	82	[ -d "/sys/class/net/${1}/bonding" ]
	83	}
	84
	85	# Check if the device bonded in a bonding device
	86	function device_is_bonded() {
711ffac1	87	local device=${1}
1848564d	88
711ffac1	89	[ -d "${SYS_CLASS_NET}/${device}/master" ]
1848564d MT	90	}
	91
	92	# Check if the device is a bridge
	93	function device_is_bridge() {
	94	[ -d "/sys/class/net/${1}/bridge" ]
	95	}
	96
81ed640c MT	97	function device_is_bridge_attached() {
	98	local device=${1}
	99
	100	[ -d "${SYS_CLASS_NET}/${device}/brport" ]
	101	}
	102
1848564d MT	103	# Check if the device is a virtual device
	104	function device_is_virtual() {
	105	local device=${1}
	106
	107	[ -e "/proc/net/vlan/${device}" ]
	108	}
	109
	110	# Check if the device has virtual devices
	111	function device_has_virtuals() {
fb02e543 MT	112	local device=${1}
	113
	114	if device_is_virtual ${device}; then
	115	return 1
	116	fi
	117
1848564d MT	118	if [ ! -e "/proc/net/vlan/config" ]; then
	119	return 1
	120	fi
	121	grep -q "${1}$" /proc/net/vlan/config
	122	}
	123
	124	function device_is_vlan() { # XXX Compat function
	125	log DEBUG "Deprecated function device_is_vlan() was used."
	126
	127	device_is_virtual $@
	128	}
	129
	130	# Check if the device is a ppp device
	131	function device_is_ppp() {
	132	local device=${1}
	133
	134	ip link show ${device} 2>/dev/null \| grep -qE "<.POINTOPOINT.>"
	135	}
	136
	137	# Check if the device is a loopback device
	138	function device_is_loopback() {
	139	local device=$(devicify ${1})
	140	[ "${device}" = "lo" ]
	141	}
	142
	143	# Check if the device is a physical network interface
	144	function device_is_real() {
	145	local device=${1}
	146
	147	device_is_loopback ${device} && \
	148	return ${EXIT_ERROR}
	149
	150	device_is_bonding ${device} && \
	151	return ${EXIT_ERROR}
	152
	153	device_is_bridge ${device} && \
	154	return ${EXIT_ERROR}
	155
	156	device_is_ppp ${device} && \
	157	return ${EXIT_ERROR}
	158
	159	device_is_virtual ${device} && \
	160	return ${EXIT_ERROR}
	161
	162	return ${EXIT_OK}
	163	}
	164
	165	# Get the device type
	166	function device_get_type() {
	167	local device=$(devicify ${1})
	168
	169	if device_is_vlan ${device}; then
	170	echo "vlan"
	171
	172	elif device_is_bonding ${device}; then
	173	echo "bonding"
	174
	175	elif device_is_bridge ${device}; then
	176	echo "bridge"
	177
	178	elif device_is_ppp ${device}; then
	179	echo "ppp"
	180
	181	elif device_is_loopback ${device}; then
182	echo "loopback"
183
184	elif device_is_real ${device}; then
185	echo "real"
186
187	else
188	echo "unknown"
189	fi
190	}
191
711ffac1 MT	192	function device_get_status() {
	193	local device=${1}
	194
	195	assert isset device
	196
	197	local status=${STATUS_UNKNOWN}
	198
	199	if ! device_has_carrier ${device}; then
	200	status=${STATUS_NOCARRIER}
	201	elif device_is_up ${device}; then
	202	status=${STATUS_UP}
	203	elif device_is_down ${device}; then
	204	status=${STATUS_DOWN}
	205	fi
	206
	207	assert isset status
	208
	209	echo "${status}"
	210	}
	211
1848564d MT	212	function device_get_address() {
	213	local device=${1}
	214
	215	cat ${SYS_CLASS_NET}/${device}/address 2>/dev/null
	216	}
	217
	218	function device_set_address() {
1b7a1578 MT	219	local device=${1}
	220	local addr=${2}
	221
	222	if ! device_exists ${device}; then
	223	error "Device '${device}' does not exist."
	224	return ${EXIT_ERROR}
	225	fi
	226
	227	log INFO "Setting address of '${device}' to '${addr}' - was $(device_get_address ${device})."
	228
	229	local up
	230	if device_is_up ${device}; then
	231	device_set_down ${device}
	232	up=1
	233	fi
	234
	235	ip link set ${device} address ${addr}
	236	local ret=$?
	237
	238	if [ "${up}" = "1" ]; then
	239	device_set_up ${device}
	240	fi
	241
	242	if [ "${ret}" != "0" ]; then
	243	error_log "Could not set address '${addr}' on device '${device}'."
	244	fi
	245
	246	return ${ret}
1848564d MT	247	}
1848564d MT	248
711ffac1 MT	249	function device_get() {
	250	local from_config
	251
	252	while [ $# -gt 0 ]; do
	253	case "${1}" in
	254	--from-config)
	255	from_config=1
	256	;;
	257	--no-config)
	258	from_config=0
	259	;;
	260	esac
	261	shift
	262	done
	263
	264	local devices
	265
	266	if [ "${from_config}" != "0" ]; then
	267	devices="${devices} $(device_config_list)"
	268	fi
	269
	270	if [ "${from_config}" != "1" ]; then
	271	local device
	272	for device in ${SYS_CLASS_NET}/*; do
	273	devices="${devices} $(basename ${device})"
	274	done
	275	fi
	276
	277	echo ${devices}
	278	return ${EXIT_OK}
	279	}
	280
1848564d	281	function devices_get_all() {
711ffac1	282	device_get
1848564d MT	283	}
	284
	285	# Check if a device has a cable plugged in
	286	function device_has_carrier() {
	287	local device=$(devicify ${1})
	288	[ "$(<${SYS_CLASS_NET}/${device}/carrier)" = "1" ]
	289	}
	290
1e4c26a4 MT	291	function device_is_promisc() {
	292	local device=${1}
	293
	294	ip link show ${device} \| grep -qE "<.PROMISC.>"
	295	}
	296
1848564d MT	297	# Check if the device is free
1848564d MT	298	function device_is_free() {
81ed640c	299	! device_is_used $@
1848564d MT	300	}
	301
	302	# Check if the device is used
	303	function device_is_used() {
	304	local device=$(devicify ${1})
	305
fb02e543 MT	306	device_has_virtuals ${device} && \
fb02e543 MT	307	return ${EXIT_OK}
1848564d	308	device_is_bonded ${device} && \
fb02e543	309	return ${EXIT_OK}
81ed640c MT	310	device_is_bridge_attached ${device} && \
81ed640c MT	311	return ${EXIT_OK}
1848564d	312
fb02e543	313	return ${EXIT_ERROR}
1848564d MT	314	}
	315
	316	# XXX to be removed I think
	317	function device_get_free() {
	318	local destination=${1}
	319
	320	# Replace + by a valid number
	321	if grep -q "+$" <<<${destination}; then
	322	local number=0
	323	destination=$(sed -e "s/+//" <<<$destination)
	324	while [ "${number}" -le "100" ]; do
	325	if ! device_exists "${destination}${number}"; then
	326	destination="${destination}${number}"
	327	break
	328	fi
	329	number=$(($number + 1))
	330	done
	331	fi
	332	echo "${destination}"
	333	}
	334
1848564d	335	function device_rename() {
1b7a1578 MT	336	warning_log "Called deprecated function 'device_rename'"
	337
	338	device_set_name $@
	339	}
	340
	341	function device_hash() {
	342	local device=${1}
	343
37e4ec8b MT	344	# Get mac address of device and remove all colons (:)
	345	# that will result in a hash.
	346	device=$(macify ${device})
	347
	348	echo "${device//:/}"
1b7a1578 MT	349	}
	350
	351	# Give the device a new name
	352	function device_set_name() {
1848564d MT	353	local source=$1
	354	local destination=$(device_get_free ${2})
	355
	356	# Check if devices exists
	357	if ! device_exists ${source} \|\| device_exists ${destination}; then
	358	return 4
	359	fi
	360
	361	local up
	362	if device_is_up ${source}; then
	363	ip link set ${source} down
	364	up=1
	365	fi
	366
	367	ip link set ${source} name ${destination}
	368
	369	if [ "${up}" = "1" ]; then
	370	ip link set ${destination} up
	371	fi
	372	}
	373
1848564d MT	374	# Set device up
	375	function device_set_up() {
	376	local device=$(devicify ${1})
	377
711ffac1 MT	378	# Silently fail if device was not found
	379	[ -z "${device}" ] && return ${EXIT_ERROR}
	380
1848564d MT	381	# Do nothing if device is already up
	382	device_is_up ${device} && return ${EXIT_OK}
	383
81ed640c MT	384	device_set_parent_up ${device}
	385
	386	log DEBUG "Setting up device '${device}'"
	387
1848564d MT	388	ip link set ${device} up
	389	}
	390
81ed640c MT	391	function device_set_parent_up() {
	392	local device=${1}
	393	local parent
	394
	395	if device_is_virtual ${device}; then
	396	parent=$(device_virtual_get_parent ${device})
	397
	398	device_is_up ${parent} && return ${EXIT_OK}
	399
	400	log DEBUG "Setting up parent device '${parent}' of '${device}'"
	401
	402	device_set_up ${parent}
	403	return $?
	404	fi
	405
	406	return ${EXIT_OK}
	407	}
	408
1848564d MT	409	# Set device down
	410	function device_set_down() {
	411	local device=$(devicify ${1})
	412
81ed640c MT	413	local ret=${EXIT_OK}
	414
	415	if device_is_up ${device}; then
	416	log DEBUG "Tearing down device '${device}'"
	417
	418	ip link set ${device} down
	419	ret=$?
	420	fi
	421
	422	device_set_parent_down ${device}
1848564d	423
81ed640c MT	424	return ${ret}
	425	}
	426
	427	function device_set_parent_down() {
	428	local device=${1}
	429	local parent
	430
	431	if device_is_virtual ${device}; then
	432	parent=$(device_virtual_get_parent ${device})
	433
	434	device_is_up ${parent} \|\| return ${EXIT_OK}
	435
	436	if device_is_free ${parent}; then
	437	log DEBUG "Tearing down parent device '${parent}' of '${device}'"
	438
	439	device_set_down ${parent}
	440	fi
	441	fi
	442
	443	return ${EXIT_OK}
1848564d MT	444	}
1848564d MT	445
1848564d MT	446	function device_get_mtu() {
	447	local device=${1}
	448
	449	if ! device_exists ${device}; then
	450	error "Device '${device}' does not exist."
	451	return ${EXIT_ERROR}
	452	fi
	453
f3e6fe50	454	echo $(<${SYS_CLASS_NET}/${device}/mtu)
1848564d MT	455	}
	456
	457	# Set mtu to a device
	458	function device_set_mtu() {
1b7a1578	459	local device=${1}
1848564d MT	460	local mtu=${2}
1848564d MT	461
1b7a1578 MT	462	if ! device_exists ${device}; then
	463	error "Device '${device}' does not exist."
	464	return ${EXIT_ERROR}
	465	fi
	466
	467	local oldmtu=$(device_get_mtu ${device})
	468
	469	if [ "${oldmtu}" = "${mtu}" ]; then
	470	# No need to set mtu.
	471	return ${EXIT_OK}
	472	fi
	473
	474	log INFO "Setting mtu of '${device}' to '${mtu}' - was ${oldmtu}."
	475
1848564d	476	local up
1b7a1578 MT	477	if device_is_up ${device}; then
1b7a1578 MT	478	device_set_down ${device}
1848564d MT	479	up=1
	480	fi
	481
1b7a1578	482	ip link set ${device} mtu ${mtu}
1848564d MT	483	local ret=$?
	484
	485	if [ "${up}" = "1" ]; then
1b7a1578 MT	486	device_set_up ${device}
	487	fi
	488
	489	if [ "${ret}" != "0" ]; then
	490	error_log "Could not set mtu '${mtu}' on device '${device}'."
1848564d MT	491	fi
	492
	493	return ${ret}
	494	}
	495
	496	function device_discover() {
	497	local device=${1}
	498
1b7a1578 MT	499	log INFO "Running discovery process on device '${device}'."
1b7a1578 MT	500
1848564d	501	local hook
d61a01d4 MT	502	for hook in $(hook_zone_get_all); do
d61a01d4 MT	503	hook_zone_exec ${hook} discover ${device}
1848564d MT	504	done
	505	}
	506
1848564d MT	507	function device_has_ipv4() {
	508	local device=${1}
	509	local addr=${2}
	510
	511	if ! device_exists ${device}; then
	512	error "Device '${device}' does not exist."
	513	return ${EXIT_ERROR}
	514	fi
	515
	516	ip addr show ${device} \| grep -q -e "inet " -e "${addr}"
	517	}
4231f419 MT	518
	519	function device_has_ipv6() {
	520	local device=${1}
	521	local addr=${2}
	522
	523	if ! device_exists ${device}; then
	524	error "Device '${device}' does not exist."
	525	return ${EXIT_ERROR}
	526	fi
	527
	528	local prefix=${addr##*/}
	529	addr=$(ipv6_implode ${addr%%/*})
	530
	531	if [ -n "${prefix}" ]; then
	532	addr="${addr}/${prefix}"
	533	fi
	534
	535	ip addr show ${device} \| grep -q "inet6 ${addr}"
	536	}
711ffac1	537
711ffac1 MT	538	function __device_get_file() {
	539	local device=${1}
	540	local file=${2}
	541
	542	assert isset device
	543	assert isset file
	544
	545	cat ${SYS_CLASS_NET}/${device}/${file}
	546	}
	547
	548	function device_get_rx_bytes() {
	549	local device=${1}
	550
	551	__device_get_file ${device} statistics/rx_bytes
	552	}
	553
	554	function device_get_tx_bytes() {
	555	local device=${1}
	556
	557	__device_get_file ${device} statistics/tx_bytes
	558	}
	559
	560	function device_get_rx_packets() {
	561	local device=${1}
	562
	563	__device_get_file ${device} statistics/rx_packets
	564	}
	565
	566	function device_get_tx_packets() {
	567	local device=${1}
	568
	569	__device_get_file ${device} statistics/tx_packets
	570	}
	571
	572	function device_get_rx_errors() {
	573	local device=${1}
	574
	575	__device_get_file ${device} statistics/rx_errors
	576	}
	577
	578	function device_get_tx_errors() {
	579	local device=${1}
	580
	581	__device_get_file ${device} statistics/tx_errors
	582	}