netdev - [PATCH net-next 3/5] ip6_tunnel: add the process for redirect in ip6_tnl

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Date:   Sat, 11 Nov 2017 19:06:51 +0800
From:   Xin Long <lucien.xin@...il.com>
To:     network dev <netdev@...r.kernel.org>
Cc:     davem@...emloft.net,
        Yasuyuki Kozakai <yasuyuki.kozakai@...hiba.co.jp>,
        Dmitry Kozlov <xeb@...l.ru>
Subject: [PATCH net-next 3/5] ip6_tunnel: add the process for redirect in ip6_tnl_err

The same process for redirect in "ip6_gre: add the process for redirect
in ip6gre_err" is needed by ip4ip6 and ip6ip6 as well.

Signed-off-by: Xin Long <lucien.xin@...il.com>
---
 net/ipv6/ip6_tunnel.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 439d65f..a1f704c 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -471,15 +471,16 @@ static int
 ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
 	    u8 *type, u8 *code, int *msg, __u32 *info, int offset)
 {
-	const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) skb->data;
-	struct ip6_tnl *t;
-	int rel_msg = 0;
+	const struct ipv6hdr *ipv6h = (const struct ipv6hdr *)skb->data;
+	struct net *net = dev_net(skb->dev);
 	u8 rel_type = ICMPV6_DEST_UNREACH;
 	u8 rel_code = ICMPV6_ADDR_UNREACH;
-	u8 tproto;
 	__u32 rel_info = 0;
-	__u16 len;
+	struct ip6_tnl *t;
 	int err = -ENOENT;
+	int rel_msg = 0;
+	u8 tproto;
+	__u16 len;
 
 	/* If the packet doesn't contain the original IPv6 header we are
 	   in trouble since we might need the source address for further
@@ -543,6 +544,10 @@ ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
 			rel_msg = 1;
 		}
 		break;
+	case NDISC_REDIRECT:
+		ip6_redirect(skb, net, skb->dev->ifindex, 0,
+			     sock_net_uid(net, NULL));
+		break;
 	}
 
 	*type = rel_type;
-- 
2.1.0