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ipv6-support: Next iteration
* Make ula_prefix a global option * Add preliminary support for NAT (Linux >= 3.7, ip6tables >= 1.4.17) * Minor fixes for prefix fallback git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34586 3c298f89-4303-0410-b956-a3cf2f4a3e73
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cyrus
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@ -8,7 +8,7 @@
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include $(TOPDIR)/rules.mk
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PKG_NAME:=ipv6-support
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PKG_VERSION:=2012-12-06
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PKG_VERSION:=2012-12-08
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PKG_RELEASE:=1
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include $(INCLUDE_DIR)/package.mk
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@ -24,14 +24,9 @@ done
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# Enable relaying if requested
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local prefix_fallback
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config_get prefix_fallback "$network" prefix_fallback
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[ "$prefix_fallback" == "relay" -a -z "$PREFIXES" -a "$state" != "unbound" ] &&
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restart_relay "$network" "fallback"
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# Disable relay if requested
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[ "$prefix_fallback" != "relay" -o -n "$PREFIXES" -o "$state" == "unbound" ] &&
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restart_relay "$network"
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local fallback="stop"
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[ -z "$PREFIXES" -a "$state" != "unbound" ] && fallback="start"
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setup_prefix_fallback "$fallback" "$network" "$device"
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# Operations in case of success
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@ -1,6 +1,8 @@
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config global global
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option ula_prefix auto
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config interface wan
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option mode dhcpv6
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option ula_prefix auto
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option request_prefix auto
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option prefix_fallback relay
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option peerdns 1
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@ -5,7 +5,7 @@
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. /lib/functions/network.sh
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config_load network6
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local NAT="ip6tables -t nat"
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conf_get() {
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local __return="$1"
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@ -67,6 +67,46 @@ resolve_network() {
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}
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setup_masquerading() {
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local cmd="$1"
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local chain="network6_masquerade_$2"
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local device="$3"
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$NAT -D POSTROUTING -j "$chain" 2>/dev/null && {
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$NAT -F "$chain" 2>/dev/null
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$NAT -X "$chain" 2>/dev/null
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}
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[ "$cmd" != "stop" ] && {
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$NAT -N "$chain"
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$NAT -A "$chain" -o "$device" -j MASQUERADE
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$NAT -A POSTROUTING -j "$chain"
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}
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}
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setup_npt_chain() {
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local cmd="$1"
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local network="$2"
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local chain="network6_npt_$network"
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[ "$cmd" != "start" ] && {
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$NAT -D POSTROUTING -j "$chain" 2>/dev/null && {
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$NAT -D PREROUTING -j "$chain" 2>/dev/null
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$NAT -F "$chain" 2>/dev/null
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$NAT -X "$chain" 2>/dev/null
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}
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}
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[ "$cmd" != "stop" ] && {
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$NAT -N "$chain" 2>/dev/null && {
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$NAT -A PREROUTING -j "$chain"
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$NAT -A POSTROUTING -j "$chain"
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}
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}
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}
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announce_prefix() {
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local prefix="$1"
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local network="$2"
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@ -84,11 +124,42 @@ announce_prefix() {
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valid=$(echo "$rem" | cut -d, -f3)
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}
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local msg='{"network": "'"$network"'", "prefix": "'"$addr"'", "length": '"$length"
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[ -n "$valid" ] && msg="$msg"', "valid": '"$valid"', "preferred": '"$prefer"
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[ -z "$cmd" ] && cmd=newprefix
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# Get prefix configuration
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local ula=""
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local prefix_action=""
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config_get ula global ula_prefix
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config_get prefix_action "$network" prefix_action
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[ -z "$prefix_action" ] && prefix_action="distribute"
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# Always announce the ULA when doing NPT
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[ "$prefix" == "$ula" -a "$prefix_action" == "npt" ] && prefix_action="distribute"
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[ "$prefix_action" == "distribute" ] && {
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local msg='{"network": "'"$network"'", "prefix": "'"$addr"'", "length": '"$length"
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[ -n "$valid" ] && msg="$msg"', "valid": '"$valid"', "preferred": '"$prefer"
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[ -z "$cmd" ] && cmd=newprefix
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ubus call 6distributed "$cmd" "$msg}"
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ubus call 6distributed "$cmd" "$msg}"
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}
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[ "$prefix_action" == "npt" ] && {
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local chain="network6_npt_$network"
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local ula_addr=$(echo "$ula" | cut -d/ -f1)
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local ula_rem=$(echo "$ula" | cut -d/ -f2)
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local ula_length=$(echo "$ula_rem" | cut -d, -f1)
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local device=""
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network_get_device device "$network"
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[ "$length" -lt "$ula_length" ] && length="$ula_length"
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[ "$cmd" == "delprefix" ] && cmd="-D $chain" || cmd="-A $chain"
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local in="-i $device -d $addr/$length -j NETMAP --to $ula_addr/$ula_length"
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local out="-o $device -s $ula_addr/$ula_length -j NETMAP --to $addr/$length"
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setup_npt_chain start "$network"
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$NAT $cmd $in
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$NAT $cmd $out
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}
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}
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@ -216,6 +287,26 @@ restart_relay() {
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}
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setup_prefix_fallback() {
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local cmd="$1"
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local network="$2"
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local device="$3"
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stop_relay "$network"
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restart_relay "$network"
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setup_masquerading stop "$network"
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[ "$cmd" != "stop" ] && {
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local fallback=""
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config_get fallback "$network" prefix_fallback
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[ "$fallback" == "relay" ] && restart_relay "$network" fallback
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[ "$fallback" == "masquerade" ] && setup_masquerading start "$network" "$device"
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}
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}
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restart_master_relay() {
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local network="$1"
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local mode="$2"
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@ -248,30 +339,24 @@ disable_interface() {
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# Disable distribution
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disable_router "$network"
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# Disable relay
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# Disable any active relays, masquerading rules and NPT rules
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stop_relay "$network"
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setup_masquerading stop "$network"
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setup_npt_chain stop "$network"
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# Disable DHCPv6 client if enabled, state script will take care
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stop_service /usr/sbin/odhcp6c "/var/run/ipv6-dhcpv6-$network.pid"
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}
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enable_static() {
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enable_ula_prefix() {
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local network="$1"
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local device="$2"
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# Enable global forwarding
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local global_forward
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conf_get global_forward all forwarding
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[ "$global_forward" != "1" ] && conf_set all forwarding 1
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# Configure device
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conf_set "$device" accept_ra 1
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conf_set "$device" forwarding 1
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local ula="$2"
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[ -z "$ula" ] && ula="global"
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# ULA-integration
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local ula_prefix=""
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config_get ula_prefix "$network" ula_prefix
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config_get ula_prefix "$ula" ula_prefix
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# ULA auto configuration (first init)
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[ "$ula_prefix" == "auto" ] && {
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@ -289,12 +374,33 @@ enable_static() {
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ula_prefix="fd$r1:$r2:$r3::/48"
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# Save prefix so it will be preserved across reboots
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uci_set network6 "$network" ula_prefix "$ula_prefix"
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config_set "$ula" ula_prefix "$ula_prefix"
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uci_set network6 "$ula" ula_prefix "$ula_prefix"
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uci_commit network6
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}
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# Announce ULA
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[ -n "$ula_prefix" ] && announce_prefix $ula_prefix $network
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[ -n "$ula_prefix" ] && announce_prefix "$ula_prefix" "$network"
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}
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enable_static() {
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local network="$1"
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local device="$2"
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# Enable global forwarding
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local global_forward
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conf_get global_forward all forwarding
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[ "$global_forward" != "1" ] && conf_set all forwarding 1
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# Configure device
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conf_set "$device" accept_ra 1
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conf_set "$device" forwarding 1
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# Enable ULA
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enable_ula_prefix "$network"
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# Compatibility (deprecated)
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enable_ula_prefix "$network" "$network"
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# Announce all static prefixes
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config_list_foreach "$network" static_prefix announce_prefix $network
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@ -316,15 +422,10 @@ enable_router() {
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# Start RD & DHCPv6 service
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local pid="/var/run/ipv6-router-$network.pid"
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# Start server
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start_service "/usr/sbin/6relayd -S . $device" "$pid"
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# Try relaying if necessary
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restart_master_relay "$network"
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# start relay if there are forced relay members
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restart_relay "$network"
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}
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@ -387,14 +488,16 @@ enable_interface()
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local network="$1"
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local device="$2"
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local mode=""
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config_get mode "$network" mode
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[ -n "$mode" -a "$mode" != "none" ] || return
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# Compatibility with old mode names
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[ "$mode" == "downstream" ] && mode=router
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[ "$mode" == "upstream" ] && mode=dhcpv6
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# Run mode startup code
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[ "$mode" == "dhcpv6" -o "$mode" == "static" ] && enable_static "$network" "$device"
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enable_static "$network" "$device"
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[ "$mode" == "dhcpv6" ] && enable_dhcpv6 "$network" "$device"
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[ "$mode" == "router" ] && enable_router "$network" "$device"
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[ "$mode" == "6to4" -o "$mode" == "6rd" ] && enable_6to4 "$network" "$device" "$mode"
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