From 965afef3174182f4977ee9656757434e3bc048ba Mon Sep 17 00:00:00 2001
From: Steven Barth <cyrus@openwrt.org>
Date: Wed, 2 Jan 2013 23:05:44 +0000
Subject: [PATCH] ipv6-support: Update iteration * Add support for blocking
 forwarding while address assignments * Fix relay restarting function

SVN-Revision: 34985
---
 package/network/ipv6/ipv6-support/Makefile    |  2 +-
 .../network/ipv6/ipv6-support/files/dhcpv6.sh | 28 +++++++++++++-
 .../ipv6/ipv6-support/files/support.sh        | 38 ++++++++++++-------
 3 files changed, 53 insertions(+), 15 deletions(-)

diff --git a/package/network/ipv6/ipv6-support/Makefile b/package/network/ipv6/ipv6-support/Makefile
index eee6f9d328..0d596d4d3b 100644
--- a/package/network/ipv6/ipv6-support/Makefile
+++ b/package/network/ipv6/ipv6-support/Makefile
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ipv6-support
-PKG_VERSION:=2013-01-01
+PKG_VERSION:=2013-01-02
 PKG_RELEASE:=1
 
 include $(INCLUDE_DIR)/package.mk
diff --git a/package/network/ipv6/ipv6-support/files/dhcpv6.sh b/package/network/ipv6/ipv6-support/files/dhcpv6.sh
index 299cf99f3d..9609f04d5c 100755
--- a/package/network/ipv6/ipv6-support/files/dhcpv6.sh
+++ b/package/network/ipv6/ipv6-support/files/dhcpv6.sh
@@ -12,6 +12,29 @@ resolve_network network "$device"
 # Unknown network
 [ -z "$network" ] && exit 0
 
+if [ "$state" == "started" ]; then
+	# Start border
+	set_forward_border "$network" "$device" enable
+
+	# Configure device
+	conf_set "$device" accept_ra 2
+	conf_set "$device" forwarding 2
+
+	# Trigger RS
+	conf_set "$device" disable_ipv6 1
+	conf_set "$device" disable_ipv6 0
+
+	exit 0
+elif [ "$state" == "stopped" ]; then
+	# Deconfigure device
+	conf_set "$device" accept_ra 1
+	conf_set "$device" forwarding 1
+
+	# Disable border
+	set_forward_border "$network" "$device" disable
+
+	exit 0
+fi
 
 # Announce prefixes
 for prefix in $PREFIXES; do
@@ -23,7 +46,7 @@ for prefix in $PREFIXES_LOST; do
 done
 
 
-# Enable relaying if requested
+# Enable relaying if requested and we didn't get a prefix, disable otherwise
 local fallback="stop"
 [ -z "$PREFIXES" -a "$state" != "unbound" ] && fallback="start"
 setup_prefix_fallback "$fallback" "$network" "$device"
@@ -32,6 +55,9 @@ setup_prefix_fallback "$fallback" "$network" "$device"
 # Operations in case of success
 [ "$state" == "timeout" -o "$state" == "unbound" ] && exit 0
 
+# Handshake completed, disable forwarding border
+set_forward_border "$network" "$device" disable
+
 local peerdns
 config_get_bool peerdns "$network" peerdns 1
 [ "$peerdns" -eq "1" ] && {
diff --git a/package/network/ipv6/ipv6-support/files/support.sh b/package/network/ipv6/ipv6-support/files/support.sh
index a38c6a41e9..8ae803cf1c 100644
--- a/package/network/ipv6/ipv6-support/files/support.sh
+++ b/package/network/ipv6/ipv6-support/files/support.sh
@@ -329,8 +329,6 @@ setup_prefix_fallback() {
 restart_master_relay() {
 	local network="$1"
 	local mode="$2"
-	local pid_fallback="/var/run/ipv6-relay-fallback-$network.pid"
-	local pid_forced="/var/run/ipv6-relay-forced-$network.pid"
 
 	# Disable active relaying to this interface
 	config_get relay_master "$network" relay_master
@@ -338,8 +336,10 @@ restart_master_relay() {
 	network_is_up "$relay_master" || return
 
 	# Detect running mode
-	[ -z "$mode" && -f "$pid_fallback" ] && mode="fallback"
-	[ -z "$mode" && -f "$pid_forced" ] && mode="forced"
+	local pid_fallback="/var/run/ipv6-relay-fallback-$relay_master.pid"
+	local pid_forced="/var/run/ipv6-relay-forced-$relay_master.pid"
+	[ -z "$mode" -a -f "$pid_fallback" ] && mode="fallback"
+	[ -z "$mode" -a -f "$pid_forced" ] && mode="forced"
 
 	# Restart relay if running or start requested
 	[ -n "$mode" ] && restart_relay "$relay_master" "$mode"
@@ -375,6 +375,26 @@ set_site_border() {
 }
 
 
+set_forward_border() {
+	local network="$1"
+	local device="$2"
+	local method="$3"
+	local fwscript="/var/etc/ipv6-firewall.d/forward-border-$network.sh"
+
+	if [ "$method" == "enable" ]; then
+		mkdir -p $(dirname "$fwscript")
+		echo "ip6tables -A forwarding_rule -o \"$device\" -j REJECT --reject-with icmp6-no-route" > "$fwscript"
+		. "$fwscript"
+	else
+		[ -f "$fwscript" ] || return
+		rm -f "$fwscript"
+		# Racy race race
+		ip6tables -D forwarding_rule -o "$device" -j REJECT --reject-with icmp6-no-route 2>/dev/null
+		ip6tables -D forwarding_rule -o "$device" -j REJECT --reject-with icmp6-no-route 2>/dev/null
+	fi
+}
+
+
 disable_interface() {
 	local network="$1"
 
@@ -446,8 +466,8 @@ enable_static() {
 	[ "$global_forward" != "1" ] && conf_set all forwarding 1
 
 	# Configure device
-	conf_set "$device" accept_ra 1
 	conf_set "$device" forwarding 1
+	conf_set "$device" accept_ra 1
 
 	# Enable ULA
 	enable_ula_prefix "$network" global "$device"
@@ -506,14 +526,6 @@ enable_dhcpv6() {
 	local network="$1"
 	local device="$2"
 	
-	# Configure device
-	conf_set "$device" accept_ra 2
-	conf_set "$device" forwarding 2
-	
-	# Trigger RS
-	conf_set "$device" disable_ipv6 1
-	conf_set "$device" disable_ipv6 0
-
 	# Configure DHCPv6-client
 	local dhcp6_opts="$device"
 
-- 
2.25.1