[people/arne_f/network.git] / functions.ipv4

#!/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/>.       #
#                                                                             #
###############################################################################

IP_SUPPORTED_PROTOCOLS="${IP_SUPPORTED_PROTOCOLS} ipv4"

function ipv4_is_valid() {
	local address=${1}

	assert isset address

	# Cut the prefix if there is one given
	local prefix=$(ip_get_prefix ${address})
	address=$(ip_split_prefix ${address})

	# If address is larger than 15 characters it cannot be an IPv4 address
	[ ${#address} -gt 15 ] && return ${EXIT_ERROR}

	# Check for a valid IPv4 prefix if provided
	if [ -n "${prefix}" ]; then
		if [ ${prefix} -lt 4 ] || [ ${prefix} -gt 30 ]; then
			return ${EXIT_ERROR}
		fi
	fi

	local IFS="."
	local octet
	local count
	for octet in ${address}; do
		if [ ${octet} -ge 0 ] && [ ${octet} -le 255 ]; then
			count=$(( ${count} + 1 ))
			continue
		fi

		# If we get here the address was not valid
		break
	done

	if [ ${count} -eq 4 ]; then
		return ${EXIT_OK}
	fi

	return ${EXIT_ERROR}
}

function ipv4_detect_duplicate() {
	local device=${1}
	local address=${2}

	assert isset address
	assert isset device
	assert device_exists ${device}

	if ! arping -q -c 2 -w 3 -D -I ${device} ${address}; then
		log DEBUG "Detected duplicate address '${address}' on device '${device}'."
		return ${EXIT_OK}
	fi

	return ${EXIT_ERROR}
}

function ipv4_update_neighbours() {
	local device=${1}
	local address=${2}

	arping -q -A -c 1 -I ${device} ${address}
	( sleep 2; arping -q -U -c 1 -I ${device} ${address} ) >/dev/null 2>&1 </dev/null &
}
Commit	Line	Data
05c234a8 MT	1	#!/bin/bash
	2	###############################################################################
	3	# #
	4	# IPFire.org - A linux based firewall #
	5	# Copyright (C) 2010 Michael Tremer & Christian Schmidt #
	6	# #
	7	# This program is free software: you can redistribute it and/or modify #
	8	# it under the terms of the GNU General Public License as published by #
	9	# the Free Software Foundation, either version 3 of the License, or #
	10	# (at your option) any later version. #
	11	# #
	12	# This program is distributed in the hope that it will be useful, #
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of #
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
	15	# GNU General Public License for more details. #
	16	# #
	17	# You should have received a copy of the GNU General Public License #
	18	# along with this program. If not, see <http://www.gnu.org/licenses/>. #
	19	# #
	20	###############################################################################
	21
e617226b MT	22	IP_SUPPORTED_PROTOCOLS="${IP_SUPPORTED_PROTOCOLS} ipv4"
e617226b MT	23
05c234a8 MT	24	function ipv4_is_valid() {
	25	local address=${1}
	26
	27	assert isset address
	28
38f61548 MT	29	# Cut the prefix if there is one given
	30	local prefix=$(ip_get_prefix ${address})
	31	address=$(ip_split_prefix ${address})
	32
	33	# If address is larger than 15 characters it cannot be an IPv4 address
	34	[ ${#address} -gt 15 ] && return ${EXIT_ERROR}
	35
	36	# Check for a valid IPv4 prefix if provided
	37	if [ -n "${prefix}" ]; then
	38	if [ ${prefix} -lt 4 ] \|\| [ ${prefix} -gt 30 ]; then
	39	return ${EXIT_ERROR}
	40	fi
	41	fi
05c234a8 MT	42
	43	local IFS="."
	44	local octet
	45	local count
	46	for octet in ${address}; do
	47	if [ ${octet} -ge 0 ] && [ ${octet} -le 255 ]; then
	48	count=$(( ${count} + 1 ))
	49	continue
	50	fi
	51
	52	# If we get here the address was not valid
	53	break
	54	done
	55
	56	if [ ${count} -eq 4 ]; then
	57	return ${EXIT_OK}
	58	fi
	59
	60	return ${EXIT_ERROR}
	61	}
	62
	63	function ipv4_detect_duplicate() {
	64	local device=${1}
	65	local address=${2}
	66
	67	assert isset address
	68	assert isset device
	69	assert device_exists ${device}
	70
	71	if ! arping -q -c 2 -w 3 -D -I ${device} ${address}; then
	72	log DEBUG "Detected duplicate address '${address}' on device '${device}'."
9eebfc55	73	return ${EXIT_OK}
05c234a8 MT	74	fi
05c234a8 MT	75
9eebfc55	76	return ${EXIT_ERROR}
05c234a8 MT	77	}
	78
	79	function ipv4_update_neighbours() {
	80	local device=${1}
	81	local address=${2}
	82
	83	arping -q -A -c 1 -I ${device} ${address}
	84	( sleep 2; arping -q -U -c 1 -I ${device} ${address} ) >/dev/null 2>&1 </dev/null &
	85	}