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