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 "$var" "wpa_key_mgmt=WPA-EAP" "$N"
  80                         append "$var" "wpa_group_rekey=300" "$N"
  81                         append "$var" "wpa_gmk_rekey=640" "$N"
  82                 ;;
  83                 *wep*)
  84                         config_get key "$vif" key
  85                         key="${key:-1}"
  86                         case "$key" in
  87                                 [1234])
  88                                         for idx in 1 2 3 4; do
  89                                                 local zidx
  90                                                 zidx=$(($idx - 1))
  91                                                 config_get ckey "$vif" "key${idx}"
  92                                                 [ -n "$ckey" ] && \
  93                                                         append "$var" "wep_key${zidx}=$(prepare_key_wep "$ckey")" "$N"
  94                                         done
  95                                         append "$var" "wep_default_key=$((key - 1))"  "$N"
  96                                 ;;
  97                                 *)
  98                                         append "$var" "wep_key0=$(prepare_key_wep "$key")" "$N"
  99                                         append "$var" "wep_default_key=0" "$N"
 100                                 ;;
 101                         esac
 102                         case "$enc" in
 103                                 *shared*)
 104                                         auth_algs=2
 105                                 ;;
 106                                 *mixed*)
 107                                         auth_algs=3
 108                                 ;;
 109                         esac
 110                         wpa=0
 111                         crypto=
 112                 ;;
 113                 *)
 114                         wpa=0
 115                         crypto=
 116                 ;;
 117         esac
 118         append "$var" "auth_algs=${auth_algs:-1}" "$N"
 119         append "$var" "wpa=$wpa" "$N"
 120         [ -n "$crypto" ] && append "$var" "wpa_pairwise=$crypto" "$N"
 121         [ -n "$wpa_group_rekey" ] && append "$var" "wpa_group_rekey=$wpa_group_rekey" "$N"
 122
 123         config_get ssid "$vif" ssid
 124         config_get bridge "$vif" bridge
 125         config_get ieee80211d "$vif" ieee80211d
 126
 127         append "$var" "ssid=$ssid" "$N"
 128         [ -n "$bridge" ] && append "$var" "bridge=$bridge" "$N"
 129         [ -n "$ieee80211d" ] && append "$var" "ieee80211d=$ieee80211d" "$N"
 130
 131         [ "$wpa" -ge "2" ] && config_get ieee80211w "$vif" ieee80211w
 132         case "$ieee80211w" in
 133                 [012])
 134                         append "$var" "ieee80211w=$ieee80211w" "$N"
 135                         [ "$ieee80211w" -gt "0" ] && {
 136                                 config_get ieee80211w_max_timeout "$vif" ieee80211w_max_timeout
 137                                 config_get ieee80211w_retry_timeout "$vif" ieee80211w_retry_timeout
 138                                 [ -n "$ieee80211w_max_timeout" ] && \
 139                                         append "$var" "assoc_sa_query_max_timeout=$ieee80211w_max_timeout" "$N"
 140                                 [ -n "$ieee80211w_retry_timeout" ] && \
 141                                         append "$var" "assoc_sa_query_retry_timeout=$ieee80211w_retry_timeout" "$N"
 142                         }
 143                 ;;
 144         esac
 145 }
 146
 147 hostapd_setup_vif() {
 148         local vif="$1"
 149         local driver="$2"
 150         hostapd_cfg=
 151
 152         hostapd_set_bss_options hostapd_cfg "$vif"
 153         config_get ifname "$vif" ifname
 154         config_get device "$vif" device
 155         config_get channel "$device" channel
 156         config_get hwmode "$device" hwmode
 157         case "$hwmode" in
 158                 *bg|*gdt|*gst|*fh) hwmode=g;;
 159                 *adt|*ast) hwmode=a;;
 160         esac
 161         [ "$channel" = auto ] && channel=
 162         [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
 163         cat > /var/run/hostapd-$ifname.conf <<EOF
 164 ctrl_interface=/var/run/hostapd-$ifname
 165 driver=$driver
 166 interface=$ifname
 167 ${hwmode:+hw_mode=${hwmode#11}}
 168 ${channel:+channel=$channel}
 169 $hostapd_cfg
 170 EOF
 171         hostapd -P /var/run/wifi-$ifname.pid -B /var/run/hostapd-$ifname.conf
 172 }
 173