fdfffd0fbe
This patch adds support for manually configuring 6rd tunnels. It depends on
the netifd patches I sent earlier, which add 6rd support.
A basic interface configuration looks like:
config interface 'wan6'
option proto '6rd'
option peeraddr '192.0.2.1'
option ip6prefix '2123::'
option ip6prefixlen '16'
option ip4prefixlen '0'
Where ip4prefixlen is optional and actually defaults to 0, which would use all
bits of the IPv4 in the calculated IPv6 subnet.
I believe it should be possible to configure a regular 6to4 tunnel using this,
and that we may want to merge the two eventually, but there are some larger
differences between the two at the moment:
- 6rd addresses can be more difficult to calculate. My ISP, for example, has
a setup with a v6 mask of 43 bits, and a v4 mask of 19.
- 6to4 has support for configuring radvd. This is something we want, of
course, but it seems best to deal with this in a separate patch.
Just creating a new package looked like the quickest way to get this in.
This work is based on the 6in4 package, and work by Stijn Tintel.
Signed-off-by: Stéphan Kochen <stephan@kochen.nl>
SVN-Revision: 32431
84 lines
1.9 KiB
Bash
84 lines
1.9 KiB
Bash
#!/bin/sh
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# 6rd.sh - IPv6-in-IPv4 tunnel backend
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# Copyright (c) 2010-2012 OpenWrt.org
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[ -n "$INCLUDE_ONLY" ] || {
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. /lib/functions.sh
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. /lib/functions/network.sh
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. ../netifd-proto.sh
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init_proto "$@"
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}
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tun_error() {
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local cfg="$1"; shift;
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[ -n "$1" ] && proto_notify_error "$cfg" "$@"
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proto_block_restart "$cfg"
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}
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proto_6rd_setup() {
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local cfg="$1"
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local iface="$2"
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local link="6rd-$cfg"
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local mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen
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json_get_vars mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen
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[ -z "$ip6prefix" -o -z "$peeraddr" ] && {
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tun_error "$cfg" "MISSING_ADDRESS"
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return
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}
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[ -z "$ipaddr" ] && {
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local wanif
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if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then
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tun_error "$cfg" "NO_WAN_LINK"
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return
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fi
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}
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# Determine the relay prefix.
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local ip4prefixlen="${ip4prefixlen:-0}"
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local ip4prefix=$(ipcalc.sh "$ipaddr/$ip4prefixlen" | grep NETWORK)
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ip4prefix="${ip4prefix#NETWORK=}"
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# Determine our IPv6 address.
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local ip6subnet=$(6rdcalc "$ip6prefix/$ip6prefixlen" "$ipaddr/$ip4prefixlen")
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local ip6addr="${ip6subnet%%::*}::1"
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proto_init_update "$link" 1
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proto_add_ipv6_address "$ip6addr" "$ip6prefixlen"
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proto_add_ipv6_route "::" 0 "::$peeraddr"
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proto_add_tunnel
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json_add_string mode sit
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json_add_int mtu "${mtu:-1280}"
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json_add_int ttl "${ttl:-64}"
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json_add_string local "$ipaddr"
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json_add_string 6rd-prefix "$ip6prefix/$ip6prefixlen"
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json_add_string 6rd-relay-prefix "$ip4prefix/$ip4prefixlen"
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proto_close_tunnel
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proto_send_update "$cfg"
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}
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proto_6rd_teardown() {
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local cfg="$1"
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}
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proto_6rd_init_config() {
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no_device=1
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available=1
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proto_config_add_int "mtu"
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proto_config_add_int "ttl"
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proto_config_add_string "peeraddr"
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proto_config_add_string "ip6prefix"
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proto_config_add_string "ip6prefixlen"
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proto_config_add_string "ip4prefixlen"
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}
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[ -n "$INCLUDE_ONLY" ] || {
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add_protocol 6rd
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}
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