diff options
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/route.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index f3d25656ddb0..aabece6b729a 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1590,6 +1590,34 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu) } EXPORT_SYMBOL_GPL(ipv4_sk_update_pmtu); +void ipv4_redirect(struct sk_buff *skb, struct net *net, + int oif, u32 mark, u8 protocol, int flow_flags) +{ + const struct iphdr *iph = (const struct iphdr *)skb->data; + struct flowi4 fl4; + struct rtable *rt; + + flowi4_init_output(&fl4, oif, mark, RT_TOS(iph->tos), RT_SCOPE_UNIVERSE, + protocol, flow_flags, iph->daddr, iph->saddr, 0, 0); + rt = __ip_route_output_key(net, &fl4); + if (!IS_ERR(rt)) { + ip_do_redirect(&rt->dst, skb); + ip_rt_put(rt); + } +} +EXPORT_SYMBOL_GPL(ipv4_redirect); + +void ipv4_sk_redirect(struct sk_buff *skb, struct sock *sk) +{ + const struct inet_sock *inet = inet_sk(sk); + + return ipv4_redirect(skb, sock_net(sk), sk->sk_bound_dev_if, + sk->sk_mark, + inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, + inet_sk_flowi_flags(sk)); +} +EXPORT_SYMBOL_GPL(ipv4_sk_redirect); + static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie) { struct rtable *rt = (struct rtable *) dst; |