busybox: ifupdown:pass interface device name for ipv6 route command

IPv6 routes need the device argument for link-local routes, or they
cannot be used at all. E.g. "gateway fe80::def" seems to be used in
some places, but kernel refuses to insert the route unless device
name is explicitly specified in the route addition.

(From OE-Core rev: 4d9fcf9f2fa573218cda3a133e0da34c4185838a)

Signed-off-by: Haiqing Bai <Haiqing.Bai@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
(cherry picked from commit 96ed437d57316153453bb5e170a4fd4f3a95883d)
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/busybox/busybox-1.24.1/ifupdown-pass-interface-device-name-for-ipv6-route-c.patch

@@ -0,0 +1,52 @@
+From 06fcf98f6ca40dc6b823d7d6231a240a1794ef2d Mon Sep 17 00:00:00 2001
+From: Haiqing Bai <Haiqing.Bai@windriver.com>
+Date: Tue, 28 Feb 2017 10:40:37 +0800
+Subject: [PATCH] ifupdown: pass interface device name for ipv6 route commands
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+commit 028524317d8d0011ed38e86e507a06738a5b5a97 from upstream
+
+IPv6 routes need the device argument for link-local routes, or they
+cannot be used at all. E.g. "gateway fe80::def" seems to be used in
+some places, but kernel refuses to insert the route unless device
+name is explicitly specified in the route addition.
+
+Signed-off-by: Timo Teräs <timo.teras@iki.fi>
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+
+Upstream-Status: Backport
+Signed-off-by: Haiqing Bai <Haiqing.Bai@windriver.com>
+---
+ networking/ifupdown.c | 7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/networking/ifupdown.c b/networking/ifupdown.c
+index 17bc4e9..a00f68d 100644
+--- a/networking/ifupdown.c
++++ b/networking/ifupdown.c
+@@ -394,8 +394,8 @@ static int FAST_FUNC static_up6(struct interface_defn_t *ifd, execfn *exec)
+ # if ENABLE_FEATURE_IFUPDOWN_IP
+ 	result = execute("ip addr add %address%/%netmask% dev %iface%[[ label %label%]]", ifd, exec);
+ 	result += execute("ip link set[[ mtu %mtu%]][[ addr %hwaddress%]] %iface% up", ifd, exec);
+-	/* Was: "[[ ip ....%gateway% ]]". Removed extra spaces w/o checking */
+-	result += execute("[[ip route add ::/0 via %gateway%]][[ metric %metric%]]", ifd, exec);
++	/* Reportedly, IPv6 needs "dev %iface%", but IPv4 does not: */
++	result += execute("[[ip route add ::/0 via %gateway% dev %iface%]][[ metric %metric%]]", ifd, exec);
+ # else
+ 	result = execute("ifconfig %iface%[[ media %media%]][[ hw %hwaddress%]][[ mtu %mtu%]] up", ifd, exec);
+ 	result += execute("ifconfig %iface% add %address%/%netmask%", ifd, exec);
+@@ -421,7 +421,8 @@ static int FAST_FUNC v4tunnel_up(struct interface_defn_t *ifd, execfn *exec)
+ 			"%endpoint%[[ local %local%]][[ ttl %ttl%]]", ifd, exec);
+ 	result += execute("ip link set %iface% up", ifd, exec);
+ 	result += execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec);
+-	result += execute("[[ip route add ::/0 via %gateway%]]", ifd, exec);
++	/* Reportedly, IPv6 needs "dev %iface%", but IPv4 does not: */
++	result += execute("[[ip route add ::/0 via %gateway% dev %iface%]]", ifd, exec);
+ 	return ((result == 4) ? 4 : 0);
+ }
+ 
+-- 
+1.9.1
+

meta/recipes-core/busybox/busybox_1.24.1.bb

@@ -54,6 +54,7 @@ SRC_URI = "http://www.busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \
            file://commit-applet_tables-fix-commit-0dddbc1.patch \
            file://makefile-libbb-race.patch \
            file://0001-libiproute-handle-table-ids-larger-than-255.patch \
+           file://ifupdown-pass-interface-device-name-for-ipv6-route-c.patch \
 "
 SRC_URI_append_libc-musl = " file://musl.cfg "