[people/stevee/network.git] / src / functions / functions.wireless-networks

#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2017  IPFire Network Development Team                         #
#                                                                             #
# 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/>.       #
#                                                                             #
###############################################################################

WIRELESS_NETWORK_CONFIG_SETTINGS="ENCRYPTION_MODE PRIORITY PSK SSID"

cli_wireless_network() {
	case "${1}" in
		new)
			wireless_network_new "${@:2}"
			;;
		destroy)
			wireless_network_destroy "${@:2}"
			;;
		*)
			local ssid="${1}"
			local key="${2//-/_}"
			shift

			if ! wireless_network_exists "${ssid}"; then
				error "No such wireless network: ${ssid}"
				return ${EXIT_ERROR}
			fi

			case "${key}" in
				encryption_mode|pre_shared_key|priority)
					wireless_network_${key} "${ssid}" "$@"
					;;
				show)
					wireless_network_show "${ssid}"
					exit $?
					;;
				*)
					error "Unrecognized argument: ${key}"
					exit ${EXIT_ERROR}
					;;
			esac
			;;
	esac
}

# This function writes all values to a via ${ssid} specificated wireless network configuration file
wireless_network_write_config() {
	assert [ $# -ge 1 ]

	local ssid="${1}"

	local ssid_hash="$(wireless_network_hash "${ssid}")"
	assert isset ssid_hash

	if ! wireless_network_exists "${ssid}"; then
		log ERROR "No such wireless network: '${ssid}'"
		return ${EXIT_ERROR}
	fi

	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"

	if ! settings_write "${path}" ${WIRELESS_NETWORK_CONFIG_SETTINGS}; then
		log ERROR "Could not write configuration settings for wireless network ${ssid}"
		return ${EXIT_ERROR}
	fi

	# When we get here the writing of the config file was successful
	return ${EXIT_OK}
}

# This funtion writes the value for one key to a via ${ssid} specificated
# wireless network configuration file
wireless_network_write_config_key() {
	assert [ $# -ge 3 ]

	local ssid="${1}"
	local key="${2}"
	shift 2

	local value="$@"

	if ! wireless_network_exists "${ssid}"; then
		log ERROR "No such wireless network: ${ssid}"
		return ${EXIT_ERROR}
	fi

	log DEBUG "Set '${key}' to new value '${value}' in wireless network '${ssid}'"

	local ${WIRELESS_NETWORK_CONFIG_SETTINGS}

	# Read the config settings
	if ! wireless_network_read_config "${ssid}"; then
		return ${EXIT_ERROR}
	fi

	# Set the key to a new value
	assign "${key}" "${value}"

	if ! wireless_network_write_config "${ssid}"; then
		return ${EXIT_ERROR}
	fi

	return ${EXIT_OK}
}

# Reads one or more keys out of a settings file or all if no key is provided.
wireless_network_read_config() {
	assert [ $# -ge 1 ]

	local ssid="${1}"
	shift 1

	local ssid_hash="$(wireless_network_hash "${ssid}")"
	assert isset ssid_hash

	if ! wireless_network_exists "${ssid}"; then
		log ERROR "No such wireless network : ${ssid}"
		return ${EXIT_ERROR}
	fi

	local args
	if [ $# -eq 0 ] && [ -n "${WIRELESS_NETWORK_CONFIG_SETTINGS}" ]; then
		list_append args ${WIRELESS_NETWORK_CONFIG_SETTINGS}
	else
		list_append args "$@"
	fi

	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"

	if ! settings_read "${path}" ${args}; then
		log ERROR "Could not read settings for wireless network ${ssid}"
		return ${EXIT_ERROR}
	fi
}

# This function checks if a wireless network exists
# Returns True when yes and false when not
wireless_network_exists() {
	assert [ $# -eq 1 ]

	local ssid="${1}"
	local ssid_hash="$(wireless_network_hash "${ssid}")"
	assert isset ssid_hash

	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}"

	# We cannot use wireless_network_read_config here beacuse we would end in a loop
	local SSID

	local path_settings="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"

	if ! settings_read "${path_settings}" SSID; then
		return ${EXIT_FALSE}
	fi

	assert isset SSID

	if [ -d "${path}" ] && [[ "${ssid}" = "${SSID}" ]]; then
		return ${EXIT_TRUE}
	else
		return ${EXIT_FALSE}
	fi
}

wireless_network_hash() {
	assert [ $# -eq 1 ]

	local string="${1}"

	local hash=$(echo -n "${string}" | md5sum )
	hash=${hash%%  -}

	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/*${hash}"

	if [ -d "${path}" ]; then
		basename "${path}"
	else
		local normalized=$(normalize "${string}")
		normalized=${normalized%-}
		echo "${normalized}-${hash}"
	fi
}

wireless_network_new() {
	if [ $# -gt 1 ]; then
		error "Too many arguments"
		return ${EXIT_ERROR}
	fi

	local ssid="${1}"
	if ! isset ssid; then
		error "Please provide a SSID"
		return ${EXIT_ERROR}
	fi

	local ssid_hash="$(wireless_network_hash "${ssid}")"
	assert isset ssid_hash

	# Check for duplicates
	if wireless_network_exists "${ssid}"; then
		error "The wireless network ${ssid} already exists"
		return ${EXIT_ERROR}
	fi

	log DEBUG "Creating wireless network '${ssid}'"

	if ! mkdir -p "${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}"; then
		log ERROR "Could not create config directory for wireless network ${ssid}"
		return ${EXIT_ERROR}
	fi

	# When the ssid is not set in the settings file we cannot write it because wireless_network_exists fails
	echo "SSID=\"${ssid}\"" >>"${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"

	local ${WIRELESS_NETWORK_CONFIG_SETTINGS}
	ENCRYPTION_MODE="${WIRELESS_DEFAULT_ENCRYPTION_MODE}"
	SSID="${ssid}"
	PRIORITY=500

	if ! wireless_network_write_config "${ssid}"; then
		log ERROR "Could not write new config file"
		return ${EXIT_ERROR}
	fi
}

# Deletes a wireless network
wireless_network_destroy() {
	local ssid="${1}"

	if ! wireless_network_exists "${ssid}"; then
		error "No such wireless network: ${ssid}"
		return ${EXIT_ERROR}
	fi

	local ssid_hash="$(wireless_network_hash "${ssid}")"
	assert isset ssid_hash

	if ! rm -rf "${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}"; then
		error "Could not delete the wireless network"
		return ${EXIT_ERROR}
	fi

	log INFO "Successfully destroyed wireless network ${ssid}"
	return ${EXIT_OK}
}

wireless_network_encryption_mode() {
	if [ ! $# -eq 2 ]; then
		log ERROR "Not enough arguments"
		return ${EXIT_ERROR}
	fi
	local ssid="${1}"
	local mode="${2}"

	if ! isoneof mode ${WIRELESS_VALID_ENCRYPTION_MODES}; then
		log ERROR "Encryption mode '${mode}' is invalid"
		return ${EXIT_ERROR}
	fi

	if ! wireless_network_write_config_key "${ssid}" "ENCRYPTION_MODE" ${mode^^}; then
		log ERROR "Could not write configuration settings"
		return ${EXIT_ERROR}
	fi
}

wireless_network_pre_shared_key() {
	if [ ! $# -eq 2 ]; then
		log ERROR "Not enough arguments"
		return ${EXIT_ERROR}
	fi
	local ssid="${1}"
	local psk="${2}"

	if ! wireless_network_write_config_key "${ssid}" "PSK" "${psk}"; then
		log ERROR "Could not write configuration settings"
		return ${EXIT_ERROR}
	fi
}

wireless_network_priority() {
	if [ ! $# -eq 2 ]; then
		log ERROR "Not enough arguments"
		return ${EXIT_ERROR}
	fi
	local ssid="${1}"
	local priority=${2}

	if ! isinteger priority && [ ! ${priority} -ge 0 ]; then
		log ERROR "The priority must be an integer greater or eqal zero"
		return ${EXIT_ERROR}
	fi

	if ! wireless_network_write_config_key "${ssid}" "PRIORITY" "${priority}"; then
		log ERROR "Could not write configuration settings"
		return ${EXIT_ERROR}
	fi
}
Commit	Line	Data
49958b8c MT	1	#!/bin/bash
	2	###############################################################################
	3	# #
	4	# IPFire.org - A linux based firewall #
	5	# Copyright (C) 2017 IPFire Network Development Team #
	6	# #
	7	# This program is free software: you can redistribute it and/or modify #
	8	# it under the terms of the GNU General Public License as published by #
	9	# the Free Software Foundation, either version 3 of the License, or #
	10	# (at your option) any later version. #
	11	# #
	12	# This program is distributed in the hope that it will be useful, #
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of #
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
	15	# GNU General Public License for more details. #
	16	# #
	17	# You should have received a copy of the GNU General Public License #
	18	# along with this program. If not, see <http://www.gnu.org/licenses/>. #
	19	# #
	20	###############################################################################
	21
364da6f4	22	WIRELESS_NETWORK_CONFIG_SETTINGS="ENCRYPTION_MODE PRIORITY PSK SSID"
49958b8c	23
49958b8c	24	cli_wireless_network() {
479b2273 MT	25	case "${1}" in
	26	new)
	27	wireless_network_new "${@:2}"
	28	;;
	29	destroy)
	30	wireless_network_destroy "${@:2}"
	31	;;
	32	*)
	33	local ssid="${1}"
	34	local key="${2//-/_}"
	35	shift
49958b8c	36
479b2273 MT	37	if ! wireless_network_exists "${ssid}"; then
	38	error "No such wireless network: ${ssid}"
	39	return ${EXIT_ERROR}
	40	fi
49958b8c	41
479b2273	42	case "${key}" in
364da6f4	43	encryption_mode\|pre_shared_key\|priority)
479b2273 MT	44	wireless_network_${key} "${ssid}" "$@"
	45	;;
	46	show)
	47	wireless_network_show "${ssid}"
	48	exit $?
	49	;;
	50	*)
	51	error "Unrecognized argument: ${key}"
	52	exit ${EXIT_ERROR}
	53	;;
	54	esac
	55	;;
	56	esac
49958b8c MT	57	}
	58
	59	# This function writes all values to a via ${ssid} specificated wireless network configuration file
	60	wireless_network_write_config() {
	61	assert [ $# -ge 1 ]
	62
	63	local ssid="${1}"
	64
	65	local ssid_hash="$(wireless_network_hash "${ssid}")"
	66	assert isset ssid_hash
	67
	68	if ! wireless_network_exists "${ssid}"; then
	69	log ERROR "No such wireless network: '${ssid}'"
	70	return ${EXIT_ERROR}
	71	fi
	72
	73	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"
	74
	75	if ! settings_write "${path}" ${WIRELESS_NETWORK_CONFIG_SETTINGS}; then
	76	log ERROR "Could not write configuration settings for wireless network ${ssid}"
	77	return ${EXIT_ERROR}
	78	fi
	79
	80	# When we get here the writing of the config file was successful
	81	return ${EXIT_OK}
	82	}
	83
	84	# This funtion writes the value for one key to a via ${ssid} specificated
	85	# wireless network configuration file
	86	wireless_network_write_config_key() {
	87	assert [ $# -ge 3 ]
	88
	89	local ssid="${1}"
	90	local key="${2}"
	91	shift 2
	92
	93	local value="$@"
	94
	95	if ! wireless_network_exists "${ssid}"; then
	96	log ERROR "No such wireless network: ${ssid}"
	97	return ${EXIT_ERROR}
	98	fi
	99
	100	log DEBUG "Set '${key}' to new value '${value}' in wireless network '${ssid}'"
	101
	102	local ${WIRELESS_NETWORK_CONFIG_SETTINGS}
	103
	104	# Read the config settings
	105	if ! wireless_network_read_config "${ssid}"; then
	106	return ${EXIT_ERROR}
	107	fi
	108
	109	# Set the key to a new value
	110	assign "${key}" "${value}"
	111
	112	if ! wireless_network_write_config "${ssid}"; then
	113	return ${EXIT_ERROR}
	114	fi
	115
	116	return ${EXIT_OK}
	117	}
	118
	119	# Reads one or more keys out of a settings file or all if no key is provided.
	120	wireless_network_read_config() {
121	assert [ $# -ge 1 ]
122
123	local ssid="${1}"
124	shift 1
125
126	local ssid_hash="$(wireless_network_hash "${ssid}")"
127	assert isset ssid_hash
128
129	if ! wireless_network_exists "${ssid}"; then
130	log ERROR "No such wireless network : ${ssid}"
131	return ${EXIT_ERROR}
132	fi
133
134	local args
135	if [ $# -eq 0 ] && [ -n "${WIRELESS_NETWORK_CONFIG_SETTINGS}" ]; then
136	list_append args ${WIRELESS_NETWORK_CONFIG_SETTINGS}
137	else
138	list_append args "$@"
139	fi
140
141	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"
142
143	if ! settings_read "${path}" ${args}; then
144	log ERROR "Could not read settings for wireless network ${ssid}"
145	return ${EXIT_ERROR}
146	fi
147	}
148
149	# This function checks if a wireless network exists
150	# Returns True when yes and false when not
151	wireless_network_exists() {
152	assert [ $# -eq 1 ]
153
154	local ssid="${1}"
155	local ssid_hash="$(wireless_network_hash "${ssid}")"
156	assert isset ssid_hash
157
158	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}"
159
160	# We cannot use wireless_network_read_config here beacuse we would end in a loop
161	local SSID
162
163	local path_settings="${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"
164
165	if ! settings_read "${path_settings}" SSID; then
166	return ${EXIT_FALSE}
167	fi
168
169	assert isset SSID
170
171	if [ -d "${path}" ] && [[ "${ssid}" = "${SSID}" ]]; then
172	return ${EXIT_TRUE}
173	else
174	return ${EXIT_FALSE}
175	fi
176	}
177
178	wireless_network_hash() {
179	assert [ $# -eq 1 ]
180
181	local string="${1}"
182
183	local hash=$(echo -n "${string}" \| md5sum )
184	hash=${hash%% -}
185
186	local path="${NETWORK_WIRELESS_NETWORKS_DIR}/*${hash}"
187
188	if [ -d "${path}" ]; then
189	basename "${path}"
190	else
191	local normalized=$(normalize "${string}")
192	normalized=${normalized%-}
193	echo "${normalized}-${hash}"
194	fi
195	}
196
197	wireless_network_new() {
198	if [ $# -gt 1 ]; then
199	error "Too many arguments"
200	return ${EXIT_ERROR}
201	fi
202
203	local ssid="${1}"
204	if ! isset ssid; then
205	error "Please provide a SSID"
206	return ${EXIT_ERROR}
207	fi
208
209	local ssid_hash="$(wireless_network_hash "${ssid}")"
210	assert isset ssid_hash
211
212	# Check for duplicates
213	if wireless_network_exists "${ssid}"; then
214	error "The wireless network ${ssid} already exists"
215	return ${EXIT_ERROR}
216	fi
217
218	log DEBUG "Creating wireless network '${ssid}'"
219
220	if ! mkdir -p "${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}"; then
221	log ERROR "Could not create config directory for wireless network ${ssid}"
222	return ${EXIT_ERROR}
223	fi
224
225	# When the ssid is not set in the settings file we cannot write it because wireless_network_exists fails
226	echo "SSID=\"${ssid}\"" >>"${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}/settings"
227
228	local ${WIRELESS_NETWORK_CONFIG_SETTINGS}
1c9e2fa8	229	ENCRYPTION_MODE="${WIRELESS_DEFAULT_ENCRYPTION_MODE}"
49958b8c MT	230	SSID="${ssid}"
	231	PRIORITY=500
	232
	233	if ! wireless_network_write_config "${ssid}"; then
	234	log ERROR "Could not write new config file"
	235	return ${EXIT_ERROR}
	236	fi
	237	}
	238
4b08d574	239	# Deletes a wireless network
49958b8c	240	wireless_network_destroy() {
4b08d574 MT	241	local ssid="${1}"
	242
	243	if ! wireless_network_exists "${ssid}"; then
	244	error "No such wireless network: ${ssid}"
	245	return ${EXIT_ERROR}
	246	fi
	247
	248	local ssid_hash="$(wireless_network_hash "${ssid}")"
	249	assert isset ssid_hash
	250
	251	if ! rm -rf "${NETWORK_WIRELESS_NETWORKS_DIR}/${ssid_hash}"; then
	252	error "Could not delete the wireless network"
	253	return ${EXIT_ERROR}
	254	fi
	255
	256	log INFO "Successfully destroyed wireless network ${ssid}"
	257	return ${EXIT_OK}
49958b8c MT	258	}
	259
	260	wireless_network_encryption_mode() {
	261	if [ ! $# -eq 2 ]; then
	262	log ERROR "Not enough arguments"
	263	return ${EXIT_ERROR}
	264	fi
	265	local ssid="${1}"
	266	local mode="${2}"
	267
1c9e2fa8	268	if ! isoneof mode ${WIRELESS_VALID_ENCRYPTION_MODES}; then
49958b8c MT	269	log ERROR "Encryption mode '${mode}' is invalid"
	270	return ${EXIT_ERROR}
	271	fi
	272
	273	if ! wireless_network_write_config_key "${ssid}" "ENCRYPTION_MODE" ${mode^^}; then
	274	log ERROR "Could not write configuration settings"
	275	return ${EXIT_ERROR}
	276	fi
	277	}
	278
364da6f4	279	wireless_network_pre_shared_key() {
49958b8c MT	280	if [ ! $# -eq 2 ]; then
	281	log ERROR "Not enough arguments"
	282	return ${EXIT_ERROR}
	283	fi
	284	local ssid="${1}"
364da6f4	285	local psk="${2}"
49958b8c	286
364da6f4	287	if ! wireless_network_write_config_key "${ssid}" "PSK" "${psk}"; then
49958b8c MT	288	log ERROR "Could not write configuration settings"
	289	return ${EXIT_ERROR}
	290	fi
	291	}
	292
	293	wireless_network_priority() {
	294	if [ ! $# -eq 2 ]; then
	295	log ERROR "Not enough arguments"
	296	return ${EXIT_ERROR}
	297	fi
	298	local ssid="${1}"
	299	local priority=${2}
	300
	301	if ! isinteger priority && [ ! ${priority} -ge 0 ]; then
	302	log ERROR "The priority must be an integer greater or eqal zero"
	303	return ${EXIT_ERROR}
	304	fi
	305
	306	if ! wireless_network_write_config_key "${ssid}" "PRIORITY" "${priority}"; then
	307	log ERROR "Could not write configuration settings"
	308	return ${EXIT_ERROR}
	309	fi
	310	}