[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
}

# 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_virtual ${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 device
	local devices

	for device in ${SYS_CLASS_NET}/*; do
		device=$(basename ${device})

		# bonding_masters is no device
		[ "${device}" = "bonding_masters" ] && continue

		devices="${devices} ${device}"
	done

	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}
}

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=$1
	local destination=${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 ${device}; then
		parent=$(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 ${device}; then
		parent=$(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}$" /proc/net/vlan/config
	122	}
	123
1848564d MT	124	# Check if the device is a ppp device
	125	function device_is_ppp() {
	126	local device=${1}
	127
	128	ip link show ${device} 2>/dev/null \| grep -qE "<.POINTOPOINT.>"
	129	}
	130
	131	# Check if the device is a loopback device
	132	function device_is_loopback() {
	133	local device=$(devicify ${1})
	134	[ "${device}" = "lo" ]
	135	}
	136
	137	# Check if the device is a physical network interface
	138	function device_is_real() {
	139	local device=${1}
	140
	141	device_is_loopback ${device} && \
	142	return ${EXIT_ERROR}
	143
	144	device_is_bonding ${device} && \
	145	return ${EXIT_ERROR}
	146
	147	device_is_bridge ${device} && \
	148	return ${EXIT_ERROR}
	149
	150	device_is_ppp ${device} && \
	151	return ${EXIT_ERROR}
	152
	153	device_is_virtual ${device} && \
	154	return ${EXIT_ERROR}
	155
	156	return ${EXIT_OK}
	157	}
	158
	159	# Get the device type
	160	function device_get_type() {
	161	local device=$(devicify ${1})
	162
8c6a8966	163	if device_is_virtual ${device}; then
1848564d MT	164	echo "vlan"
	165
	166	elif device_is_bonding ${device}; then
	167	echo "bonding"
	168
	169	elif device_is_bridge ${device}; then
	170	echo "bridge"
	171
	172	elif device_is_ppp ${device}; then
	173	echo "ppp"
	174
	175	elif device_is_loopback ${device}; then
	176	echo "loopback"
	177
	178	elif device_is_real ${device}; then
	179	echo "real"
	180
	181	else
	182	echo "unknown"
	183	fi
	184	}
	185
711ffac1 MT	186	function device_get_status() {
	187	local device=${1}
	188
	189	assert isset device
	190
	191	local status=${STATUS_UNKNOWN}
	192
	193	if ! device_has_carrier ${device}; then
	194	status=${STATUS_NOCARRIER}
	195	elif device_is_up ${device}; then
	196	status=${STATUS_UP}
	197	elif device_is_down ${device}; then
	198	status=${STATUS_DOWN}
	199	fi
	200
	201	assert isset status
	202
	203	echo "${status}"
	204	}
	205
1848564d MT	206	function device_get_address() {
	207	local device=${1}
	208
	209	cat ${SYS_CLASS_NET}/${device}/address 2>/dev/null
	210	}
	211
	212	function device_set_address() {
1b7a1578 MT	213	local device=${1}
	214	local addr=${2}
	215
	216	if ! device_exists ${device}; then
	217	error "Device '${device}' does not exist."
	218	return ${EXIT_ERROR}
	219	fi
	220
	221	log INFO "Setting address of '${device}' to '${addr}' - was $(device_get_address ${device})."
	222
	223	local up
	224	if device_is_up ${device}; then
	225	device_set_down ${device}
	226	up=1
	227	fi
	228
	229	ip link set ${device} address ${addr}
	230	local ret=$?
	231
	232	if [ "${up}" = "1" ]; then
	233	device_set_up ${device}
	234	fi
	235
	236	if [ "${ret}" != "0" ]; then
	237	error_log "Could not set address '${addr}' on device '${device}'."
	238	fi
	239
	240	return ${ret}
1848564d MT	241	}
1848564d MT	242
711ffac1	243	function device_get() {
2ae0fb8d	244	local device
711ffac1 MT	245	local devices
711ffac1 MT	246
2ae0fb8d MT	247	for device in ${SYS_CLASS_NET}/*; do
2ae0fb8d MT	248	device=$(basename ${device})
711ffac1	249
2ae0fb8d MT	250	# bonding_masters is no device
	251	[ "${device}" = "bonding_masters" ] && continue
	252
	253	devices="${devices} ${device}"
	254	done
711ffac1 MT	255
	256	echo ${devices}
	257	return ${EXIT_OK}
	258	}
	259
1848564d	260	function devices_get_all() {
711ffac1	261	device_get
1848564d MT	262	}
	263
	264	# Check if a device has a cable plugged in
	265	function device_has_carrier() {
	266	local device=$(devicify ${1})
	267	[ "$(<${SYS_CLASS_NET}/${device}/carrier)" = "1" ]
	268	}
	269
1e4c26a4 MT	270	function device_is_promisc() {
	271	local device=${1}
	272
	273	ip link show ${device} \| grep -qE "<.PROMISC.>"
	274	}
	275
1848564d MT	276	# Check if the device is free
1848564d MT	277	function device_is_free() {
81ed640c	278	! device_is_used $@
1848564d MT	279	}
	280
	281	# Check if the device is used
	282	function device_is_used() {
	283	local device=$(devicify ${1})
	284
fb02e543 MT	285	device_has_virtuals ${device} && \
fb02e543 MT	286	return ${EXIT_OK}
1848564d	287	device_is_bonded ${device} && \
fb02e543	288	return ${EXIT_OK}
81ed640c MT	289	device_is_bridge_attached ${device} && \
81ed640c MT	290	return ${EXIT_OK}
1848564d	291
fb02e543	292	return ${EXIT_ERROR}
1848564d MT	293	}
1848564d MT	294
1b7a1578 MT	295	function device_hash() {
	296	local device=${1}
	297
37e4ec8b MT	298	# Get mac address of device and remove all colons (:)
	299	# that will result in a hash.
	300	device=$(macify ${device})
	301
	302	echo "${device//:/}"
1b7a1578 MT	303	}
	304
	305	# Give the device a new name
	306	function device_set_name() {
1848564d	307	local source=$1
1578dae9	308	local destination=${2}
1848564d MT	309
	310	# Check if devices exists
	311	if ! device_exists ${source} \|\| device_exists ${destination}; then
	312	return 4
	313	fi
	314
	315	local up
	316	if device_is_up ${source}; then
	317	ip link set ${source} down
	318	up=1
	319	fi
	320
	321	ip link set ${source} name ${destination}
	322
	323	if [ "${up}" = "1" ]; then
	324	ip link set ${destination} up
	325	fi
	326	}
	327
1848564d MT	328	# Set device up
	329	function device_set_up() {
	330	local device=$(devicify ${1})
	331
711ffac1 MT	332	# Silently fail if device was not found
	333	[ -z "${device}" ] && return ${EXIT_ERROR}
	334
1848564d MT	335	# Do nothing if device is already up
	336	device_is_up ${device} && return ${EXIT_OK}
	337
81ed640c MT	338	device_set_parent_up ${device}
	339
	340	log DEBUG "Setting up device '${device}'"
	341
1848564d MT	342	ip link set ${device} up
	343	}
	344
81ed640c MT	345	function device_set_parent_up() {
	346	local device=${1}
	347	local parent
	348
	349	if device_is_virtual ${device}; then
8c6a8966	350	parent=$(virtual_get_parent ${device})
81ed640c MT	351
	352	device_is_up ${parent} && return ${EXIT_OK}
	353
	354	log DEBUG "Setting up parent device '${parent}' of '${device}'"
	355
	356	device_set_up ${parent}
	357	return $?
	358	fi
	359
	360	return ${EXIT_OK}
	361	}
	362
1848564d MT	363	# Set device down
	364	function device_set_down() {
	365	local device=$(devicify ${1})
	366
81ed640c MT	367	local ret=${EXIT_OK}
	368
	369	if device_is_up ${device}; then
	370	log DEBUG "Tearing down device '${device}'"
	371
	372	ip link set ${device} down
	373	ret=$?
	374	fi
	375
	376	device_set_parent_down ${device}
1848564d	377
81ed640c MT	378	return ${ret}
	379	}
	380
	381	function device_set_parent_down() {
	382	local device=${1}
	383	local parent
	384
	385	if device_is_virtual ${device}; then
8c6a8966	386	parent=$(virtual_get_parent ${device})
81ed640c MT	387
	388	device_is_up ${parent} \|\| return ${EXIT_OK}
	389
	390	if device_is_free ${parent}; then
	391	log DEBUG "Tearing down parent device '${parent}' of '${device}'"
	392
	393	device_set_down ${parent}
	394	fi
	395	fi
	396
	397	return ${EXIT_OK}
1848564d MT	398	}
1848564d MT	399
1848564d MT	400	function device_get_mtu() {
	401	local device=${1}
	402
	403	if ! device_exists ${device}; then
	404	error "Device '${device}' does not exist."
	405	return ${EXIT_ERROR}
	406	fi
	407
f3e6fe50	408	echo $(<${SYS_CLASS_NET}/${device}/mtu)
1848564d MT	409	}
	410
	411	# Set mtu to a device
	412	function device_set_mtu() {
1b7a1578	413	local device=${1}
1848564d MT	414	local mtu=${2}
1848564d MT	415
1b7a1578 MT	416	if ! device_exists ${device}; then
	417	error "Device '${device}' does not exist."
	418	return ${EXIT_ERROR}
	419	fi
	420
	421	local oldmtu=$(device_get_mtu ${device})
	422
	423	if [ "${oldmtu}" = "${mtu}" ]; then
	424	# No need to set mtu.
	425	return ${EXIT_OK}
	426	fi
	427
	428	log INFO "Setting mtu of '${device}' to '${mtu}' - was ${oldmtu}."
	429
1848564d	430	local up
1b7a1578 MT	431	if device_is_up ${device}; then
1b7a1578 MT	432	device_set_down ${device}
1848564d MT	433	up=1
	434	fi
	435
1b7a1578	436	ip link set ${device} mtu ${mtu}
1848564d MT	437	local ret=$?
	438
	439	if [ "${up}" = "1" ]; then
1b7a1578 MT	440	device_set_up ${device}
	441	fi
	442
	443	if [ "${ret}" != "0" ]; then
	444	error_log "Could not set mtu '${mtu}' on device '${device}'."
1848564d MT	445	fi
	446
	447	return ${ret}
	448	}
	449
	450	function device_discover() {
	451	local device=${1}
	452
1b7a1578 MT	453	log INFO "Running discovery process on device '${device}'."
1b7a1578 MT	454
1848564d	455	local hook
d61a01d4 MT	456	for hook in $(hook_zone_get_all); do
d61a01d4 MT	457	hook_zone_exec ${hook} discover ${device}
1848564d MT	458	done
	459	}
	460
1848564d MT	461	function device_has_ipv4() {
	462	local device=${1}
	463	local addr=${2}
	464
	465	if ! device_exists ${device}; then
	466	error "Device '${device}' does not exist."
	467	return ${EXIT_ERROR}
	468	fi
	469
	470	ip addr show ${device} \| grep -q -e "inet " -e "${addr}"
	471	}
4231f419 MT	472
	473	function device_has_ipv6() {
	474	local device=${1}
	475	local addr=${2}
	476
	477	if ! device_exists ${device}; then
	478	error "Device '${device}' does not exist."
	479	return ${EXIT_ERROR}
	480	fi
	481
	482	local prefix=${addr##*/}
	483	addr=$(ipv6_implode ${addr%%/*})
	484
	485	if [ -n "${prefix}" ]; then
	486	addr="${addr}/${prefix}"
	487	fi
	488
	489	ip addr show ${device} \| grep -q "inet6 ${addr}"
	490	}
711ffac1	491
711ffac1 MT	492	function __device_get_file() {
	493	local device=${1}
	494	local file=${2}
	495
	496	assert isset device
	497	assert isset file
	498
	499	cat ${SYS_CLASS_NET}/${device}/${file}
	500	}
	501
	502	function device_get_rx_bytes() {
	503	local device=${1}
	504
	505	__device_get_file ${device} statistics/rx_bytes
	506	}
	507
	508	function device_get_tx_bytes() {
	509	local device=${1}
	510
	511	__device_get_file ${device} statistics/tx_bytes
	512	}
	513
	514	function device_get_rx_packets() {
	515	local device=${1}
	516
	517	__device_get_file ${device} statistics/rx_packets
	518	}
	519
	520	function device_get_tx_packets() {
	521	local device=${1}
	522
	523	__device_get_file ${device} statistics/tx_packets
	524	}
	525
	526	function device_get_rx_errors() {
	527	local device=${1}
	528
	529	__device_get_file ${device} statistics/rx_errors
	530	}
	531
	532	function device_get_tx_errors() {
	533	local device=${1}
	534
	535	__device_get_file ${device} statistics/tx_errors
	536	}