ipv6: Add ip6_redirect() and ip6_sk_redirect() helper functions. (3a5ad2ee) · Commits · e / devices / android_kernel_xiaomi_sm6125

include/net/ip6_route.h

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -139,6 +139,8 @@ extern void ip6_update_pmtu(struct sk_buff skb, struct net net, __be32 mtu,
	int oif, u32 mark);		int oif, u32 mark);
	extern void ip6_sk_update_pmtu(struct sk_buff skb, struct sock sk,		extern void ip6_sk_update_pmtu(struct sk_buff skb, struct sock sk,
	__be32 mtu);		__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;		struct netlink_callback;

+27 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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);		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)		static unsigned int ip6_default_advmss(const struct dst_entry *dst)
	{		{
	struct net_device *dev = dst->dev;		struct net_device *dev = dst->dev;