-vpn_load () {
- CFG="$TCONF/$1/tinc.conf"
- [ -f $CFG ] || { echo "Error: $CFG does not exist" >&2 ; return 1 }
-
- # load TINCD config
- DEV=`grep -i -e '^TapDevice' $CFG | sed 's/[[:space:]]//g;s/^.*=//g'`
- VPN=`grep -i -e '^(MyOwnVPNIP|MyVirtualIP)' -E $CFG | head -1 | sed 's/[[:space:]]//g;s/^.*=//g'`
-
- # discourage empty and multiple entries
- [ -z "$DEV" ] && \
- { echo "Error: TapDevice needed" >&2 ; return 2 }
- echo $DEV | grep -q '^/dev/tap' ||
- { echo "Error: TapDevice needs /dev/tapX" >&2 ; return 2 }
- [ `echo $DEV | wc -l` -gt 1 ] && \
- { echo "Error in TapDevice" >&2 ; return 3 }
- [ -z "$VPN" ] && \
- { echo "Error: MyOwnVPNIP/MyVirtualIP needed" >&2 ; return 2 }
- [ `echo $VPN | wc -l` -gt 1 ] && \
- { echo "Error in MyOwnVPNIP/MyVirtualIP" >&2 ; return 3 }
- echo $VPN | grep -q -x \
- '\([[:digit:]]\{1,3\}\.\)\{3\}[[:digit:]]\{1,3\}/[[:digit:]]\{1,2\}' ||
- { echo "Error in MyOwnVPNIP/MyVirtualIP address $VPN" ;
- return 3 }
-
- # network device
- TAP=`echo $DEV | cut -d"/" -f3`
- NUM=`echo $TAP | sed 's/tap//'`
-
- # IP address, netmask length
- ADR=`echo $VPN | cut -d"/" -f1`
- LEN=`echo $VPN | cut -d"/" -f2`
-
- # Expand bitlength to netmask
- MSK=""; len=$LEN
- for cnt in 1 1 1 0; do
- if [ $len -ge 8 ]; then
- msk=8
- else
- msk=$len
- fi
-
- MSK="$MSK$((255 & (255 << (8 - msk))))"
- [ $cnt -ne 0 ] && MSK="$MSK."
- len=$((len-msk))
- done
-
- # Network & broadcast
- BRD=`ipcalc --broadcast $ADR $MSK | cut -d"=" -f2`
- NET=`ipcalc --network $ADR $MSK | cut -d"=" -f2`
-
- # MAC address
- MAC=`printf "fe:fd:%0.2x:%0.2x:%0.2x:%0.2x" $(echo $ADR | sed 's/\./ /g')`
- # echo "TAP $TAP NUM $NUM ADR $ADR LEN $LEN MSK $MSK BRD $BRD NET $NET MAC $MAC" >&2
- return 0
-}