+ # set up an ipv6 tunnel
+ ipv6-tunnel() {
+ case $1 in
+ start)
+ if ifconfig sit1 2>/dev/null | grep -q 'inet6 addr: 2002:.*:1::1' ; then
+ print 'ipv6 tunnel already set up, nothing to be done.'
+ print 'execute: "ifconfig sit1 down ; ifconfig sit0 down" to remove ipv6-tunnel.' ; return 1
+ else
+ [ -n "$PUBLIC_IP" ] || local PUBLIC_IP=$(ifconfig $(route -n | awk '/^0\.0\.0\.0/{print $8; exit}') | \
+ awk '/inet addr:/ {print $2}' | tr -d 'addr:')
+ [ -n "$PUBLIC_IP" ] || { print 'No $PUBLIC_IP set and could not determine default one.' ; return 1 }
+ local IPV6ADDR=$(printf "2002:%02x%02x:%02x%02x:1::1" $(print ${PUBLIC_IP//./ }))
+ print -n "Setting up ipv6 tunnel $IPV6ADDR via ${PUBLIC_IP}: "
+ ifconfig sit0 tunnel ::192.88.99.1 up
+ ifconfig sit1 add "$IPV6ADDR" && print done || print failed
+ fi
+ ;;
+ status)
+ if ifconfig sit1 2>/dev/null | grep -q 'inet6 addr: 2002:.*:1::1' ; then
+ print 'ipv6 tunnel available' ; return 0
+ else
+ print 'ipv6 tunnel not available' ; return 1
+ fi
+ ;;
+ stop)
+ if ifconfig sit1 2>/dev/null | grep -q 'inet6 addr: 2002:.*:1::1' ; then
+ print -n 'Stopping ipv6 tunnel (sit0 + sit1): '
+ ifconfig sit1 down ; ifconfig sit0 down && print done || print failed
+ else
+ print 'No ipv6 tunnel found, nothing to be done.' ; return 1
+ fi
+ ;;
+ *)
+ print "Usage: ipv6-tunnel [start|stop|status]">&2 ; return 1
+ ;;
+ esac
+ }
+
+ # run dhclient for wireless device
+ iwclient() {
+ salias dhclient "$(wavemon -d | awk '/device/{print $2}')"
+ }
+