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