diff options
Diffstat (limited to 'roles/common/files/etc/network/if-up.d/ipsec')
| -rwxr-xr-x | roles/common/files/etc/network/if-up.d/ipsec | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/roles/common/files/etc/network/if-up.d/ipsec b/roles/common/files/etc/network/if-up.d/ipsec new file mode 100755 index 0000000..e21d6ea --- /dev/null +++ b/roles/common/files/etc/network/if-up.d/ipsec @@ -0,0 +1,44 @@ +#!/bin/sh +# +# A post-up/down hook to automatically create/delete a 'sec' VLAN +# device, and a dedicated, host-scoped, IP for IPSec (v4 only). +# +# Copyright 2013 Guilhem Moulin <guilhem@fripost.org> +# +# Licensed under the GNU GPL version 3 or higher. +# + +set -ue +PATH=/usr/sbin:/usr/bin:/sbin:/bin + +if=sec0 +ip=172.16.0.1/32 + +# Ignore the loopback interface and non inet4 families. +[ "$IFACE" != lo -a "$ADDRFAM" = inet ] || exit 0 + +# Only the device with the default, globally-scoped route, is of +# interest here. +[ "$( /bin/ip -4 route show to default scope global \ + | sed -nr '/^default via \S+ dev (\S+).*/ {s//\1/p;q}' )" \ + = \ + "$IFACE" ] || exit 0 + +case "$MODE" in + start) # Don't create $if if it's already there + /bin/ip -o link show | grep -qE "^[0-9]+:\s+$if" && exit 0 + + # Create a new VLAN $IFACE on physical device $if. This is + # required otherwise charon thinks the left peer is that + # host-scoped, non-routable IP. + /bin/ip link add link "$IFACE" name "$if" type vlan id 2713 + /bin/ip address add "$ip" dev "$if" scope host + /bin/ip link set dev "$if" up + ;; + stop) # Don't create $if if it's no there + /bin/ip -o link show | grep -qE "^[0-9]+:\s+$if" || exit 0 + + # Deactivate the VLAN + /bin/ip link set dev "$if" down + ;; +esac |