package/hostapd/files/hostapd.sh

   1 hostapd_set_bss_options() {
   2         local var="$1"
   3         local vif="$2"
   4         local enc wpa_group_rekey
   5
   6         config_get enc "$vif" encryption
   7         config_get wpa_group_rekey "$vif" wpa_group_rekey
   8         config_get_bool ap_isolate "$vif" isolate 0
   9
  10         config_get device "$vif" device
  11         config_get hwmode "$device" hwmode
  12
  13         if [ "$ap_isolate" -gt 0 ]; then
  14                 append "$var" "ap_isolate=$ap_isolate" "$N"
  15         fi
  16
  17         # Examples:
  18         # psk-mixed/tkip        => WPA1+2 PSK, TKIP
  19         # wpa-psk2/tkip+aes     => WPA2 PSK, CCMP+TKIP
  20         # wpa2/tkip+aes         => WPA2 RADIUS, CCMP+TKIP
  21         # ...
  22
  23         # TODO: move this parsing function somewhere generic, so that
  24         # later it can be reused by drivers that don't use hostapd
  25
  26         # crypto defaults: WPA2 vs WPA1
  27         case "$enc" in
  28                 wpa2*|*psk2*)
  29                         wpa=2
  30                         crypto="CCMP"
  31                 ;;
  32                 *mixed*)
  33                         wpa=3
  34                         crypto="CCMP TKIP"
  35                 ;;
  36                 *)
  37                         wpa=1
  38                         crypto="TKIP"
  39                 ;;
  40         esac
  41
  42         # explicit override for crypto setting
  43         case "$enc" in
  44                 *tkip+aes|*tkip+ccmp|*aes+tkip|*ccmp+tkip) crypto="CCMP TKIP";;
  45                 *aes|*ccmp) crypto="CCMP";;
  46                 *tkip) crypto="TKIP";;
  47         esac
  48
  49         # enforce CCMP for 11ng and 11na
  50         case "$hwmode" in
  51                 *ng|*na) crypto="CCMP";;
  52         esac
  53
  54         # use crypto/auth settings for building the hostapd config
  55         case "$enc" in
  56                 *psk*)
  57                         config_get psk "$vif" key
  58                         if [ ${#psk} -eq 64 ]; then
  59                                 append "$var" "wpa_psk=$psk" "$N"
  60                         else
  61                                 append "$var" "wpa_passphrase=$psk" "$N"
  62                         fi
  63                 ;;
  64                 *wpa*)
  65                         # required fields? formats?
  66                         # hostapd is particular, maybe a default configuration for failures
  67                         config_get server "$vif" server
  68                         append "$var" "auth_server_addr=$server" "$N"
  69                         config_get port "$vif" port
  70                         port=${port:-1812}
  71                         append "$var" "auth_server_port=$port" "$N"
  72                         config_get secret "$vif" key
  73                         append "$var" "auth_server_shared_secret=$secret" "$N"
  74                         config_get nasid "$vif" nasid
  75                         append "$var" "nas_identifier=$nasid" "$N"
  76                         append "$var" "eapol_key_index_workaround=1" "$N"
  77                         append "$var" "radius_acct_interim_interval=300" "$N"
  78                         append "$var" "ieee8021x=1" "$N"
  79                         append "$var" "auth_algs=1" "$N"
  80                         append "$var" "wpa_key_mgmt=WPA-EAP" "$N"
  81                         append "$var" "wpa_group_rekey=300" "$N"
  82                         append "$var" "wpa_gmk_rekey=640" "$N"
  83                 ;;
  84                 *wep*)
  85                         config_get key "$vif" key
  86                         key="${key:-1}"
  87                         case "$key" in
  88                                 [1234])
  89                                         for idx in 1 2 3 4; do
  90                                                 local zidx
  91                                                 zidx=$(($idx - 1))
  92                                                 config_get ckey "$vif" "key${idx}"
  93                                                 [ -n "$ckey" ] && \
  94                                                         append "$var" "wep_key${zidx}=$(prepare_key_wep "$ckey")" "$N"
  95                                         done
  96                                         append "$var" "wep_default_key=$((key - 1))"  "$N"
  97                                 ;;
  98                                 *)
  99                                         append "$var" "wep_key0=$(prepare_key_wep "$key")" "$N"
 100                                         append "$var" "wep_default_key=0" "$N"
 101                                 ;;
 102                         esac
 103                         wpa=0
 104                         crypto=
 105                 ;;
 106                 *)
 107                         wpa=0
 108                         crypto=
 109                 ;;
 110         esac
 111         append "$var" "wpa=$wpa" "$N"
 112         [ -n "$crypto" ] && append "$var" "wpa_pairwise=$crypto" "$N"
 113         [ -n "$wpa_group_rekey" ] && append "$var" "wpa_group_rekey=$wpa_group_rekey" "$N"
 114
 115         config_get ssid "$vif" ssid
 116         config_get bridge "$vif" bridge
 117         config_get ieee80211d "$vif" ieee80211d
 118
 119         append "$var" "ssid=$ssid" "$N"
 120         [ -n "$bridge" ] && append "$var" "bridge=$bridge" "$N"
 121         [ -n "$ieee80211d" ] && append "$var" "ieee80211d=$ieee80211d" "$N"
 122
 123         [ "$wpa" -ge "2" ] && config_get ieee80211w "$vif" ieee80211w
 124         case "$ieee80211w" in
 125                 [012])
 126                         append "$var" "ieee80211w=$ieee80211w" "$N"
 127                         [ "$ieee80211w" -gt "0" ] && {
 128                                 config_get ieee80211w_max_timeout "$vif" ieee80211w_max_timeout
 129                                 config_get ieee80211w_retry_timeout "$vif" ieee80211w_retry_timeout
 130                                 [ -n "$ieee80211w_max_timeout" ] && \
 131                                         append "$var" "assoc_sa_query_max_timeout=$ieee80211w_max_timeout" "$N"
 132                                 [ -n "$ieee80211w_retry_timeout" ] && \
 133                                         append "$var" "assoc_sa_query_retry_timeout=$ieee80211w_retry_timeout" "$N"
 134                         }
 135                 ;;
 136         esac
 137 }
 138
 139 hostapd_setup_vif() {
 140         local vif="$1"
 141         local driver="$2"
 142         hostapd_cfg=
 143
 144         hostapd_set_bss_options hostapd_cfg "$vif"
 145         config_get ifname "$vif" ifname
 146         config_get device "$vif" device
 147         config_get channel "$device" channel
 148         config_get hwmode "$device" hwmode
 149         case "$hwmode" in
 150                 *bg|*gdt|*gst|*fh) hwmode=g;;
 151                 *adt|*ast) hwmode=a;;
 152         esac
 153         [ "$channel" = auto ] && channel=
 154         [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
 155         cat > /var/run/hostapd-$ifname.conf <<EOF
 156 ctrl_interface=/var/run/hostapd-$ifname
 157 driver=$driver
 158 interface=$ifname
 159 ${hwmode:+hw_mode=${hwmode#11}}
 160 ${channel:+channel=$channel}
 161 $hostapd_cfg
 162 EOF
 163         hostapd -P /var/run/wifi-$ifname.pid -B /var/run/hostapd-$ifname.conf
 164 }
 165