diff options
Diffstat (limited to 'package/6in4/files/6in4.sh')
| -rwxr-xr-x | package/6in4/files/6in4.sh | 54 |
1 files changed, 39 insertions, 15 deletions
diff --git a/package/6in4/files/6in4.sh b/package/6in4/files/6in4.sh index 68a00edd8..5e416ee0b 100755 --- a/package/6in4/files/6in4.sh +++ b/package/6in4/files/6in4.sh @@ -1,6 +1,16 @@ # 6in4.sh - IPv6-in-IPv4 tunnel backend # Copyright (c) 2010 OpenWrt.org +find_6in4_wanif() { + local if=$(ip -4 r l e 0/0); if="${if#default via * dev }"; if="${if%% *}" + [ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if" +} + +find_6in4_wanip() { + local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }" + echo "${ip%%/[0-9]* brd *}" +} + # Hook into scan_interfaces() to synthesize a .device option # This is needed for /sbin/ifup to properly dispatch control # to setup_interface_6in4() even if no .ifname is set in @@ -36,26 +46,40 @@ setup_interface_6in4() { local defaultroute config_get_bool defaultroute "$cfg" defaultroute 1 + # If local4 is unset, guess local IPv4 address from the + # interface used by the default route. + [ -z "$local4" ] && { + local wanif=$(find_6in4_wanif) + [ -n "$wanif" ] && { + local4=$(find_6in4_wanip "$wanif") + uci_set_state network "$cfg" wan_device "$wanif" + } + } - # creating the tunnel below will trigger a net subsystem event - # prevent it from touching or iface by disabling .auto here - uci_set_state network "$cfg" ifname $link - uci_set_state network "$cfg" auto 0 + [ -n "$local4" ] && { + # creating the tunnel below will trigger a net subsystem event + # prevent it from touching or iface by disabling .auto here + uci_set_state network "$cfg" ifname $link + uci_set_state network "$cfg" auto 0 - ip tunnel add $link mode sit remote $remote4 local $local4 ttl 255 - ip link set $link up - ip link set mtu ${mtu:-1280} dev $link - ip tunnel change $link ttl ${ttl:-64} - ip addr add $local6 dev $link + ip tunnel add $link mode sit remote $remote4 local $local4 ttl 255 + ip link set $link up + ip link set mtu ${mtu:-1280} dev $link + ip tunnel change $link ttl ${ttl:-64} + ip addr add $local6 dev $link - uci_set_state network "$cfg" ip6addr $local6 + uci_set_state network "$cfg" ipaddr $local4 + uci_set_state network "$cfg" ip6addr $local6 - [ "$defaultroute" = 1 ] && { - ip -6 route add ::/0 dev $link - uci_set_state network "$cfg" defaultroute 1 - } + [ "$defaultroute" = 1 ] && { + ip -6 route add ::/0 dev $link + uci_set_state network "$cfg" defaultroute 1 + } - env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" & + env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6in4 /sbin/hotplug-call "iface" & + } || { + echo "Cannot determine local IPv4 address for 6in4 tunnel $cfg - skipping" + } } stop_interface_6in4() { |