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ip6_gre: add the process for redirect in ip6gre_err 

This patch is to add redirect icmp packet process for ip6gre by
calling ip6_redirect() in ip6gre_err(), as in vti6_err.

Prior to this patch, there's even no route cache generated after
receiving redirect.

Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2017-11-11 19:06:49 +08:00 committed by David S. Miller
parent 0d728b844c
commit 929fc03275
1 changed files with 5 additions and 0 deletions
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5
net/ipv6/ip6_gre.c
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@ -369,6 +369,7 @@ static void ip6gre_tunnel_uninit(struct net_device *dev)
static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
u8 type, u8 code, int offset, __be32 info) u8 type, u8 code, int offset, __be32 info)
{ {
struct net *net = dev_net(skb->dev);
const struct gre_base_hdr *greh; const struct gre_base_hdr *greh;
const struct ipv6hdr *ipv6h; const struct ipv6hdr *ipv6h;
int grehlen = sizeof(*greh); int grehlen = sizeof(*greh);
@ -442,6 +443,10 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
mtu = IPV6_MIN_MTU; mtu = IPV6_MIN_MTU;
t->dev->mtu = mtu; t->dev->mtu = mtu;
return; return;
case NDISC_REDIRECT:
ip6_redirect(skb, net, skb->dev->ifindex, 0,
sock_net_uid(net, NULL));
return;
} }
if (time_before(jiffies, t->err_time + IP6TUNNEL_ERR_TIMEO)) if (time_before(jiffies, t->err_time + IP6TUNNEL_ERR_TIMEO))