### field is used (a) by the accompanying `ipif-peers' script to set up the
### peer association, and (b) to determine the correct MTU to set; it
### should have the form ADDRESS[:PORT], where the PORT defaults to 4070 if
-### it's not given explicitly.
+### it's not given explicitly, and an IPv6 ADDRESS is enclosed in square
+### brackets (because of the stupid syntax decision to use colons in IPv6
+### address literals).
###
### Having done all of that, and having configured userv-ipif correctly,
### you should set TRIPE_SLIPIF=.../tripe-ipif and everything should just
addr=$(tripectl addr $peer)
set -- $addr
case $1 in
- INET) remote_ext=$2 ;;
+ INET | INET6) remote_af=$1 remote_ext=$2 ;;
*) echo >&2 "$quis: unexpected address family \`$1'"; exit 1 ;;
esac
;;
+ \[*\]:*)
+ remote_af=INET6
+ remote_ext=${remote_ext#\[}
+ remote_ext=${remote_ext%\]:*}
+ ;;
*:*)
+ remote_af=INET
remote_ext=${remote_ext%:*}
;;
esac
## Determine the MTU based on the path.
pmtu=$(pathmtu $remote_ext)
-mtu=$(( $pmtu - 29 - $overhead ))
+case $remote_af in
+ INET) iphdrsz=20 ;;
+ INET6) iphdrsz=40 ;;
+esac
+mtu=$(( $pmtu - $iphdrsz - 8 - $overhead - 1 ))
## Obtain the tunnel and run it.
now=$(date +"%Y-%m-%d %H:%M:%S")