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| author | David S. Miller <davem@davemloft.net> | 2012-07-12 00:08:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-12 00:08:07 -0700 |
| commit | 3a5ad2ee5e2c5030d8a303d06f9148a2f893a369 (patch) | |
| tree | 946aa295174ef8605d9e91eb44755aeebfc7a0da | |
| parent | 6e157b6ac61aa7758ccd643d4aafdf3cc17b9f04 (diff) | |
| download | kernel-common-3a5ad2ee5e2c5030d8a303d06f9148a2f893a369.tar.gz kernel-common-3a5ad2ee5e2c5030d8a303d06f9148a2f893a369.tar.bz2 kernel-common-3a5ad2ee5e2c5030d8a303d06f9148a2f893a369.zip | |
ipv6: Add ip6_redirect() and ip6_sk_redirect() helper functions.
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/ip6_route.h | 2 | ||||
| -rw-r--r-- | net/ipv6/route.c | 27 |
2 files changed, 29 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h index 5cedbd7688c6..693940565d8a 100644 --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -139,6 +139,8 @@ extern void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif, u32 mark); extern void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu); +extern void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark); +extern void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk); struct netlink_callback; diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 545b1526c143..f52cf83bb1e0 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1114,6 +1114,33 @@ void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu) } EXPORT_SYMBOL_GPL(ip6_sk_update_pmtu); +void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark) +{ + const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; + struct dst_entry *dst; + struct flowi6 fl6; + + memset(&fl6, 0, sizeof(fl6)); + fl6.flowi6_oif = oif; + fl6.flowi6_mark = mark; + fl6.flowi6_flags = 0; + fl6.daddr = iph->daddr; + fl6.saddr = iph->saddr; + fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK; + + dst = ip6_route_output(net, NULL, &fl6); + if (!dst->error) + rt6_do_redirect(dst, skb); + dst_release(dst); +} +EXPORT_SYMBOL_GPL(ip6_redirect); + +void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk) +{ + ip6_redirect(skb, sock_net(sk), sk->sk_bound_dev_if, sk->sk_mark); +} +EXPORT_SYMBOL_GPL(ip6_sk_redirect); + static unsigned int ip6_default_advmss(const struct dst_entry *dst) { struct net_device *dev = dst->dev; |