| 1 | #!/bin/sh |
| 2 | # 6rd.sh - IPv6-in-IPv4 tunnel backend |
| 3 | # Copyright (c) 2010-2012 OpenWrt.org |
| 4 | |
| 5 | [ -n "$INCLUDE_ONLY" ] || { |
| 6 | . /lib/functions.sh |
| 7 | . /lib/functions/network.sh |
| 8 | . ../netifd-proto.sh |
| 9 | init_proto "$@" |
| 10 | } |
| 11 | |
| 12 | proto_6rd_setup() { |
| 13 | local cfg="$1" |
| 14 | local iface="$2" |
| 15 | local link="6rd-$cfg" |
| 16 | |
| 17 | local mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen |
| 18 | json_get_vars mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen |
| 19 | |
| 20 | [ -z "$ip6prefix" -o -z "$peeraddr" ] && { |
| 21 | proto_notify_error "$cfg" "MISSING_ADDRESS" |
| 22 | proto_block_restart "$cfg" |
| 23 | return |
| 24 | } |
| 25 | |
| 26 | ( proto_add_host_dependency "$cfg" 0.0.0.0 ) |
| 27 | |
| 28 | [ -z "$ipaddr" ] && { |
| 29 | local wanif |
| 30 | if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then |
| 31 | proto_notify_error "$cfg" "NO_WAN_LINK" |
| 32 | return |
| 33 | fi |
| 34 | } |
| 35 | |
| 36 | # Determine the relay prefix. |
| 37 | local ip4prefixlen="${ip4prefixlen:-0}" |
| 38 | local ip4prefix=$(ipcalc.sh "$ipaddr/$ip4prefixlen" | grep NETWORK) |
| 39 | ip4prefix="${ip4prefix#NETWORK=}" |
| 40 | |
| 41 | # Determine our IPv6 address. |
| 42 | local ip6subnet=$(6rdcalc "$ip6prefix/$ip6prefixlen" "$ipaddr/$ip4prefixlen") |
| 43 | local ip6addr="${ip6subnet%%::*}::1" |
| 44 | |
| 45 | proto_init_update "$link" 1 |
| 46 | proto_add_ipv6_address "$ip6addr" "$ip6prefixlen" |
| 47 | proto_add_ipv6_route "::" 0 "::$peeraddr" |
| 48 | |
| 49 | proto_add_tunnel |
| 50 | json_add_string mode sit |
| 51 | json_add_int mtu "${mtu:-1280}" |
| 52 | json_add_int ttl "${ttl:-64}" |
| 53 | json_add_string local "$ipaddr" |
| 54 | json_add_string 6rd-prefix "$ip6prefix/$ip6prefixlen" |
| 55 | json_add_string 6rd-relay-prefix "$ip4prefix/$ip4prefixlen" |
| 56 | proto_close_tunnel |
| 57 | |
| 58 | proto_send_update "$cfg" |
| 59 | } |
| 60 | |
| 61 | proto_6rd_teardown() { |
| 62 | local cfg="$1" |
| 63 | } |
| 64 | |
| 65 | proto_6rd_init_config() { |
| 66 | no_device=1 |
| 67 | available=1 |
| 68 | |
| 69 | proto_config_add_int "mtu" |
| 70 | proto_config_add_int "ttl" |
| 71 | proto_config_add_string "ipaddr" |
| 72 | proto_config_add_string "peeraddr" |
| 73 | proto_config_add_string "ip6prefix" |
| 74 | proto_config_add_string "ip6prefixlen" |
| 75 | proto_config_add_string "ip4prefixlen" |
| 76 | } |
| 77 | |
| 78 | [ -n "$INCLUDE_ONLY" ] || { |
| 79 | add_protocol 6rd |
| 80 | } |
| 81 | |
