package/network/ipv6/ds-lite/files/dslite.sh

   1 #!/bin/sh
   2 # dslite.sh - IPv4-in-IPv6 tunnel backend for ipip6 and ds-lite
   3 # Copyright (c) 2013 OpenWrt.org
   4 # Copyright (c) 2013 Steven Barth <steven@midlink.org>
   5 # Copyright (c) 2021 Kenji Uno <ku@digitaldolphins.jp>
   6 # Copyright (c) 2024 Arayuki Mago <ms@missing233.com>
   7
   8 [ -n "$INCLUDE_ONLY" ] || {
   9         . /lib/functions.sh
  10         . /lib/functions/network.sh
  11         . ../netifd-proto.sh
  12         init_proto "$@"
  13 }
  14
  15 tnl_setup() {
  16         local cfg="$1"
  17         local iface="$2"
  18         local tnl_type="$3"
  19         local ip4addr="$4"
  20         local ip4gateway="$5"
  21         local link="$tnl_type-$cfg"
  22         local remoteip6
  23
  24         local mtu ttl peeraddr ip6addr tunlink zone weakif encaplimit
  25         json_get_vars mtu ttl peeraddr ip6addr tunlink zone weakif encaplimit
  26
  27         [ -z "$peeraddr" ] && {
  28                 proto_notify_error "$cfg" "MISSING_ADDRESS"
  29                 proto_block_restart "$cfg"
  30                 return
  31         }
  32
  33         ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
  34
  35         remoteip6=$(resolveip -6 "$peeraddr")
  36         if [ -z "$remoteip6" ]; then
  37                 sleep 3
  38                 remoteip6=$(resolveip -6 "$peeraddr")
  39                 if [ -z "$remoteip6" ]; then
  40                         proto_notify_error "$cfg" "AFTR_DNS_FAIL"
  41                         return
  42                 fi
  43         fi
  44
  45         for ip6 in $remoteip6; do
  46                 peeraddr=$ip6
  47                 break
  48         done
  49
  50         [ -z "$ip6addr" ] && {
  51                 local wanif="$tunlink"
  52                 if [ -z "$wanif" ] && ! network_find_wan6 wanif; then
  53                         proto_notify_error "$cfg" "NO_WAN_LINK"
  54                         return
  55                 fi
  56
  57                 if ! network_get_ipaddr6 ip6addr "$wanif"; then
  58                         [ -z "$weakif" ] && weakif="lan"
  59                         if ! network_get_ipaddr6 ip6addr "$weakif"; then
  60                                 proto_notify_error "$cfg" "NO_WAN_LINK"
  61                                 return
  62                         fi
  63                 fi
  64         }
  65
  66         proto_init_update "$link" 1
  67         proto_add_ipv4_route "0.0.0.0" 0
  68         proto_add_ipv4_address "$ip4addr" "" "" "$ip4gateway"
  69
  70         proto_add_tunnel
  71         json_add_string mode ipip6
  72         json_add_int mtu "${mtu:-1280}"
  73         json_add_int ttl "${ttl:-64}"
  74         json_add_string local "$ip6addr"
  75         json_add_string remote "$peeraddr"
  76         [ -n "$tunlink" ] && json_add_string link "$tunlink"
  77         json_add_object "data"
  78           [ -n "$encaplimit" ] && json_add_string encaplimit "$encaplimit"
  79         json_close_object
  80         proto_close_tunnel
  81
  82         proto_add_data
  83         [ -n "$zone" ] && json_add_string zone "$zone"
  84
  85         if [ "$tnl_type" = "ds" ]; then
  86                 json_add_array firewall
  87                         json_add_object ""
  88                                 json_add_string type nat
  89                                 json_add_string target ACCEPT
  90                         json_close_object
  91                 json_close_array
  92         fi
  93
  94         proto_close_data
  95
  96         proto_send_update "$cfg"
  97 }
  98
  99 init_config() {
 100         no_device=1
 101         available=1
 102
 103         proto_config_add_string "ip6addr"
 104         proto_config_add_string "peeraddr"
 105         proto_config_add_string "tunlink"
 106         proto_config_add_int "mtu"
 107         proto_config_add_int "ttl"
 108         proto_config_add_string "encaplimit"
 109         proto_config_add_string "zone"
 110         proto_config_add_string "weakif"
 111 }
 112
 113 proto_ipip6_init_config() {
 114         init_config
 115         proto_config_add_string "ip4ifaddr"
 116 }
 117
 118 proto_ipip6_setup() {
 119         local ip4ifaddr
 120         json_get_vars ip4ifaddr
 121         tnl_setup "$1" "$2" "ipip6" "$ip4ifaddr" "0.0.0.0"
 122 }
 123
 124 proto_ipip6_teardown() {
 125         local cfg="$1"
 126 }
 127
 128 proto_dslite_init_config() {
 129         init_config
 130 }
 131
 132 proto_dslite_setup() {
 133         tnl_setup "$1" "$2" "ds" "192.0.0.2" "192.0.0.1"
 134 }
 135
 136 proto_dslite_teardown() {
 137         local cfg="$1"
 138 }
 139
 140 [ -n "$INCLUDE_ONLY" ] || {
 141         add_protocol ipip6
 142         add_protocol dslite
 143 }