src/functions/functions.hostapd

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2012  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
  22 HOSTAPD_CONTROL_INTERFACE_DIR="/run/hostapd/ctrl"
  23
  24 HOSTAPD_SUPPORTED_MODES="802.11a 802.11a/n 802.11ac 802.11g 802.11g/n"
  25
  26 hostapd_config_write() {
  27         local device=${1}
  28         assert isset device
  29
  30         local file=${2}
  31         assert isset file
  32
  33         # Shift the device and file argument.
  34         shift 2
  35
  36         local broadcast_ssid
  37         local channel
  38         local channel_bandwidth
  39         local country_code="$(wireless_get_reg_domain)"
  40         local dfs="on"
  41         local encryption
  42         local key
  43         local mode
  44         local ssid
  45         local wmm="1"
  46
  47         while [ $# -gt 0 ]; do
  48                 case "${1}" in
  49                         --broadcast-ssid=*)
  50                                 broadcast_ssid=$(cli_get_val "${1}")
  51                                 ;;
  52                         --channel=*)
  53                                 channel=$(cli_get_val "${1}")
  54                                 ;;
  55                         --channel-bandwidth=*)
  56                                 channel_bandwidth="$(cli_get_val "${1}")"
  57                                 ;;
  58                         --dfs=*)
  59                                 dfs="$(cli_get_val "${1}")"
  60                                 ;;
  61                         --encryption=*)
  62                                 encryption=$(cli_get_val "${1}")
  63                                 ;;
  64                         --key=*)
  65                                 key=$(cli_get_val "${1}")
  66                                 ;;
  67                         --mode=*)
  68                                 mode=$(cli_get_val "${1}")
  69
  70                                 if ! isoneof mode ${HOSTAPD_SUPPORTED_MODES}; then
  71                                         error "Unsupported mode: ${mode}"
  72                                         return ${EXIT_ERROR}
  73                                 fi
  74                                 ;;
  75                         --ssid=*)
  76                                 ssid=$(cli_get_val "${1}")
  77                                 ;;
  78                         --wmm=*)
  79                                 local val="$(cli_get_val "${1}")"
  80                                 if enabled val; then
  81                                         wmm="1"
  82                                 else
  83                                         wmm="0"
  84                                 fi
  85                                 ;;
  86                         *)
  87                                 warning_log "Ignoring unknown argument '${1}'."
  88                                 ;;
  89                 esac
  90                 shift
  91         done
  92
  93         # Check if mode is set
  94         if ! isset mode; then
  95                 error "Mode is not set"
  96                 return ${EXIT_ERROR}
  97         fi
  98
  99         assert isset broadcast_ssid
 100         assert isbool broadcast_ssid
 101
 102         assert isset channel
 103         assert isinteger channel
 104
 105         assert isset mode
 106         assert isset ssid
 107
 108         # Check if key is set when encryption is used.
 109         if isset encryption; then
 110                 assert isoneof encryption WPA WPA2 WPA/WPA2
 111                 assert isset key
 112         fi
 113
 114         # Check channel bandwidth for validity
 115         if isset channel_bandwidth && ! wireless_channel_bandwidth_is_valid "${mode}" "${channel_bandwidth}"; then
 116                 error "Invalid channel bandwidth for ${mode}: ${channel_bandwidth}"
 117                 return ${EXIT_ERROR}
 118         fi
 119
 120         # 802.11ac/n flags
 121         local ieee80211ac
 122         local ieee80211n
 123         local vht_caps
 124         local vht_oper_chwidth="0"
 125         local ht_caps
 126
 127         local hw_mode
 128         case "${mode}" in
 129                 802.11a)
 130                         hw_mode="a"
 131                         ;;
 132
 133                 802.11a/n)
 134                         hw_mode="a"
 135                         ieee80211n="1"
 136
 137                         # Fetch HT caps
 138                         ht_caps="$(wireless_get_ht_caps "${device}")"
 139                         ;;
 140
 141                 802.11g)
 142                         hw_mode="g"
 143                         ;;
 144
 145                 802.11g/n)
 146                         hw_mode="g"
 147                         ieee80211n="1"
 148
 149                         # Fetch HT caps
 150                         ht_caps="$(wireless_get_ht_caps "${device}")"
 151                         ;;
 152
 153                 802.11ac)
 154                         hw_mode="a"
 155                         ieee80211ac="1"
 156                         ieee80211n="1"
 157
 158                         # Fetch VHT caps
 159                         vht_caps="$(wireless_get_vht_caps "${device}")"
 160
 161                         # Fetch HT caps
 162                         ht_caps="$(wireless_get_ht_caps "${device}")"
 163
 164                         case "${channel_bandwidth}" in
 165                                 80)
 166                                         vht_oper_chwidth="1"
 167                                         ;;
 168                                 160)
 169                                         vht_oper_chwidth="2"
 170                                         ;;
 171                                 80+80)
 172                                         vht_oper_chwidth="3"
 173                                         ;;
 174                         esac
 175                         ;;
 176         esac
 177
 178         # Create configuration directory.
 179         local config_dir=$(dirname ${file})
 180         mkdir -p ${HOSTAPD_CONTROL_INTERFACE_DIR} ${config_dir} 2>/dev/null
 181
 182         config_header "hostapd" > ${file}
 183
 184         # Interface configuration
 185         (
 186                 print "# Interface configuration"
 187                 print "driver=nl80211"
 188                 print "interface=${device}"
 189                 print
 190         ) >> ${file}
 191
 192         # Wireless configuration
 193         local ignore_broadcast_ssid
 194         if enabled broadcast_ssid; then
 195                 ignore_broadcast_ssid="0"
 196         else
 197                 ignore_broadcast_ssid="1"
 198         fi
 199
 200         (
 201                 print "# Default settings"
 202
 203                 # Advertise country code and maximum transmission power
 204                 print "ieee80211d=1"
 205
 206                 # Enable Radar Detection
 207                 if enabled dfs && wireless_supports_dfs "${device}"; then
 208                         print "ieee80211h=1"
 209                 else
 210                         print "ieee80211h=0"
 211                 fi
 212
 213                 print # empty line
 214
 215                 print "# Wireless configuration"
 216                 print "hw_mode=${hw_mode}"
 217
 218                 if isset ieee80211ac; then
 219                         print "ieee80211ac=${ieee80211ac}"
 220                 fi
 221
 222                 if isset ieee80211n; then
 223                         print "ieee80211n=${ieee80211n}"
 224                 fi
 225
 226                 print "channel=${channel}"
 227                 print "country_code=${country_code}"
 228                 print "ignore_broadcast_ssid=${ignore_broadcast_ssid}"
 229
 230                 if contains_spaces "${ssid}"; then
 231                         print "ssid=\"${ssid}\""
 232                 else
 233                         print "ssid=${ssid}"
 234                 fi
 235
 236                 # WMM
 237                 print "wmm_enabled=${wmm}"
 238
 239                 # Enable VHT caps
 240                 if isset vht_caps; then
 241                         print "vht_capab=${vht_caps}"
 242                 fi
 243
 244                 # Enable HT caps
 245                 print "ht_capab=${ht_caps}"
 246
 247                 # Wider Channels
 248                 print "vht_oper_chwidth=${vht_oper_chwidth}"
 249
 250                 print
 251         ) >> ${file}
 252
 253         # Control interface.
 254         (
 255                 print "# Control interface"
 256                 print "ctrl_interface=${HOSTAPD_CONTROL_INTERFACE_DIR}"
 257                 print "ctrl_interface_group=0"
 258                 print
 259         ) >> ${file}
 260
 261         # Encryption settings
 262         if isset encryption; then
 263                 local encryption_mode=0
 264                 case "${encryption}" in
 265                         WPA)
 266                                 encryption_mode=1
 267                                 ;;
 268                         WPA2)
 269                                 encryption_mode=2
 270                                 ;;
 271                         WPA/WPA2)
 272                                 encryption_mode=3
 273                                 ;;
 274                 esac
 275
 276                 (
 277                         print "# Encryption settings"
 278                         print "wpa=${encryption_mode}"
 279                         print "wpa_passphrase=${key}"
 280                         print "wpa_key_mgmt=WPA-PSK"
 281                         print "wpa_pairwise=TKIP"
 282                         print "rsn_pairwise=CCMP"
 283                         print
 284                 ) >> ${file}
 285         fi
 286
 287         return ${EXIT_OK}
 288 }
 289
 290 hostapd_start() {
 291         local device=${1}
 292         assert isset device
 293
 294         service_start "hostapd@${device}.service"
 295         local ret=$?
 296
 297         if [ ${ret} -eq ${EXIT_OK} ]; then
 298                 log DEBUG "hostapd has been successfully started on '${device}'"
 299         else
 300                 log ERROR "Could not start hostapd on '${device}': ${ret}"
 301                 return ${EXIT_ERROR}
 302         fi
 303
 304         return ${EXIT_OK}
 305 }
 306
 307 hostapd_stop() {
 308         local device=${1}
 309         assert isset device
 310
 311         service_stop "hostapd@${device}.service"
 312 }