From b77541dbb2f442e51842f9d24c8745a6df2d1478 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Mon, 14 May 2018 16:44:15 +0200 Subject: busybox: udhcpc: fix IPv6 support when using udhcpc The udhcpc script calls ip addr flush .. which flushes addresses of any address family, including IPv6. However, busybox udhcpc is IPv4 only and should not influence IPv6 addressing. Hence use ip addr flush with family constrait. The script particularly broke IPv6 SLAAC: Typically when udhcpc calls the script the kernel already assigned the IPv6 link-local address. The flush removes the link-local IPv6 address again and prohibits proper IPv6 operation such as SLAAC since neighbor discovery protocol relies on IPv6 link-local addressing. Signed-off-by: Stefan Agner Signed-off-by: Richard Purdie --- meta/recipes-core/busybox/files/simple.script | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'meta/recipes-core/busybox/files') diff --git a/meta/recipes-core/busybox/files/simple.script b/meta/recipes-core/busybox/files/simple.script index 6ed0293525..8b5eb53633 100644 --- a/meta/recipes-core/busybox/files/simple.script +++ b/meta/recipes-core/busybox/files/simple.script @@ -28,7 +28,7 @@ case "$1" in fi if ! root_is_nfs ; then if [ $have_bin_ip -eq 1 ]; then - /SBIN_DIR/ip addr flush dev $interface + /SBIN_DIR/ip -4 addr flush dev $interface /SBIN_DIR/ip link set dev $interface up else /SBIN_DIR/ifconfig $interface 0.0.0.0 -- cgit 1.2.3-korg