1 # tayga.sh - NAT64 backend
4 local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
5 [ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
9 local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }"
10 echo "${ip%%[^0-9.]*}"
14 local if=$(ip -6 r l e ::/0); if="${if#default* dev }"; if="${if%% *}"
15 [ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
19 local ip=$(ip -6 a s dev "$1"); ip="${ip#*inet6 }"
20 echo "${ip%%[^0-9A-Fa-f:]*}"
23 # Hook into scan_interfaces() to synthesize a .device option
24 # This is needed for /sbin/ifup to properly dispatch control
25 # to setup_interface_tayga() even if no .ifname is set in
28 config_set "$1" device "tayga-$1"
31 coldplug_interface_tayga() {
32 setup_interface_tayga "tayga-$1" "$1"
38 local ipv4_addr ipv6_addr
39 config_get ipv4_addr "$cfg" ipv4_addr ""
40 config_get ipv6_addr "$cfg" ipv6_addr ""
41 [ -n "$ipv4_addr" ] && [ -n "$ipv6_addr" ] &&
42 echo "map $ipv4_addr $ipv6_addr" >>$tmpconf
45 setup_interface_tayga() {
48 local link="tayga-$cfg"
50 local ipv4_addr ipv6_addr prefix dynamic_pool
52 config_get ipv4_addr "$cfg" ipv4_addr
53 config_get ipv6_addr "$cfg" ipv6_addr
54 config_get prefix "$cfg" prefix
55 config_get dynamic_pool "$cfg" dynamic_pool
62 local wanip4=$(uci_get network "$cfg" ipv4addr)
63 local wanip6=$(uci_get network "$cfg" ipv6addr)
65 local wanif4=$(find_tayga_wanif4)
66 local wanif6=$(find_tayga_wanif6)
70 wanip4=$(find_tayga_wanip4 "$wanif4")
71 uci_set_state network "$cfg" wan4_device "$wanif4"
77 wanip6=$(find_tayga_wanip6 "$wanif6")
78 uci_set_state network "$cfg" wan6_device "$wanif6"
82 [ -n "$wanip4" ] && [ -n "$wanip6" ] || {
83 echo "Cannot determine local IPv4 and IPv6 addressed for tayga NAT64 $cfg - skipping"
87 local tmpconf="/var/etc/tayga-$cfg.conf"
90 mkdir -p /var/run/tayga/$cfg
92 echo "tun-device $link" >$tmpconf
93 echo "ipv4-addr $ipv4_addr" >>$tmpconf
94 [ -n "$ipv6_addr" ] &&
95 echo "ipv6-addr $ipv6_addr" >>$tmpconf
97 echo "prefix $prefix" >>$tmpconf
99 config_foreach conf_rule_add map_rule "$tmpconf"
101 [ -n "$dynamic_pool" ] &&
102 echo "dynamic-pool $dynamic_pool" >>$tmpconf
103 echo "data-dir /var/run/tayga/$cfg" >>$tmpconf
105 # creating the tunnel below will trigger a net subsystem event
106 # prevent it from touching or iface by disabling .auto here
107 uci_set_state network "$cfg" ifname $link
108 uci_set_state network "$cfg" auto 0
111 ip link set "$link" up
113 ip addr add "$wanip4" dev "$link"
114 ip addr add "$wanip6" dev "$link"
116 [ -n "$dynamic_pool" ] &&
117 ip -4 route add "$dynamic_pool" dev "$link"
119 ip -6 route add "$prefix" dev "$link"
121 start-stop-daemon -S -x tayga -- $args -p /var/run/$link.pid
123 env -i ACTION="ifup" DEVICE="$link" INTERFACE="$cfg" PROTO="tayga" \
124 /sbin/hotplug-call iface
127 stop_interface_tayga() {
129 local link="tayga-$cfg"
131 env -i ACTION="ifdown" DEVICE="$link" INTERFACE="$cfg" PROTO="tayga" \
132 /sbin/hotplug-call iface
134 service_kill tayga "/var/run/$link.pid"
136 ip link set "$link" down
137 ip addr flush dev "$link"
138 ip route flush dev "$link"