From c1f55c5e0482e095b1d0d6721e4e56fcb44fe001 Mon Sep 17 00:00:00 2001 From: Qing Deng Date: Sun, 23 Jan 2022 14:00:00 +0800 Subject: [PATCH] ip6_tunnel: allow routing IPv4 traffic in NBMA mode Since IPv4 routes support IPv6 gateways now, we can route IPv4 traffic in NBMA tunnels. Signed-off-by: Qing Deng Signed-off-by: David S. Miller --- net/ipv6/ip6_tunnel.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 97ade833f58c..b47ffc81f9e5 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1121,6 +1121,11 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr)); neigh_release(neigh); + } else if (skb->protocol == htons(ETH_P_IP)) { + struct rtable *rt = skb_rtable(skb); + + if (rt->rt_gw_family == AF_INET6) + memcpy(&fl6->daddr, &rt->rt_gw6, sizeof(fl6->daddr)); } } else if (t->parms.proto != 0 && !(t->parms.flags & (IP6_TNL_F_USE_ORIG_TCLASS |