Contributors: 20
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Harald Welte |
131 |
26.20% |
2 |
6.25% |
| Patrick McHardy |
91 |
18.20% |
6 |
18.75% |
| David S. Miller |
75 |
15.00% |
3 |
9.38% |
| Eric Dumazet |
38 |
7.60% |
2 |
6.25% |
| David Ahern |
31 |
6.20% |
1 |
3.12% |
| Julian Anastasov |
29 |
5.80% |
1 |
3.12% |
| Herbert Xu |
26 |
5.20% |
2 |
6.25% |
| Jason A. Donenfeld |
23 |
4.60% |
1 |
3.12% |
| Simon Horman |
13 |
2.60% |
1 |
3.12% |
| Florian Westphal |
10 |
2.00% |
2 |
6.25% |
| Pablo Neira Ayuso |
5 |
1.00% |
1 |
3.12% |
| Eric W. Biedermann |
5 |
1.00% |
1 |
3.12% |
| Arnaldo Carvalho de Melo |
4 |
0.80% |
1 |
3.12% |
| Alexey Dobriyan |
3 |
0.60% |
2 |
6.25% |
| Denis V. Lunev |
3 |
0.60% |
1 |
3.12% |
| Paul Gortmaker |
3 |
0.60% |
1 |
3.12% |
| Tejun Heo |
3 |
0.60% |
1 |
3.12% |
| KOVACS Krisztian |
3 |
0.60% |
1 |
3.12% |
| Paul Guo |
3 |
0.60% |
1 |
3.12% |
| Thomas Graf |
1 |
0.20% |
1 |
3.12% |
| Total |
500 |
|
32 |
|
/*
* IPv4 specific functions of netfilter core
*
* Rusty Russell (C) 2000 -- This code is GPL.
* Patrick McHardy (C) 2006-2012
*/
#include <linux/kernel.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/ip.h>
#include <linux/skbuff.h>
#include <linux/gfp.h>
#include <linux/export.h>
#include <net/route.h>
#include <net/xfrm.h>
#include <net/ip.h>
#include <net/netfilter/nf_queue.h>
/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, unsigned int addr_type)
{
const struct iphdr *iph = ip_hdr(skb);
struct rtable *rt;
struct flowi4 fl4 = {};
__be32 saddr = iph->saddr;
__u8 flags;
struct net_device *dev = skb_dst(skb)->dev;
unsigned int hh_len;
sk = sk_to_full_sk(sk);
flags = sk ? inet_sk_flowi_flags(sk) : 0;
if (addr_type == RTN_UNSPEC)
addr_type = inet_addr_type_dev_table(net, dev, saddr);
if (addr_type == RTN_LOCAL || addr_type == RTN_UNICAST)
flags |= FLOWI_FLAG_ANYSRC;
else
saddr = 0;
/* some non-standard hacks like ipt_REJECT.c:send_reset() can cause
* packets with foreign saddr to appear on the NF_INET_LOCAL_OUT hook.
*/
fl4.daddr = iph->daddr;
fl4.saddr = saddr;
fl4.flowi4_tos = RT_TOS(iph->tos);
fl4.flowi4_oif = sk ? sk->sk_bound_dev_if : 0;
if (!fl4.flowi4_oif)
fl4.flowi4_oif = l3mdev_master_ifindex(dev);
fl4.flowi4_mark = skb->mark;
fl4.flowi4_flags = flags;
rt = ip_route_output_key(net, &fl4);
if (IS_ERR(rt))
return PTR_ERR(rt);
/* Drop old route. */
skb_dst_drop(skb);
skb_dst_set(skb, &rt->dst);
if (skb_dst(skb)->error)
return skb_dst(skb)->error;
#ifdef CONFIG_XFRM
if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
xfrm_decode_session(skb, flowi4_to_flowi(&fl4), AF_INET) == 0) {
struct dst_entry *dst = skb_dst(skb);
skb_dst_set(skb, NULL);
dst = xfrm_lookup(net, dst, flowi4_to_flowi(&fl4), sk, 0);
if (IS_ERR(dst))
return PTR_ERR(dst);
skb_dst_set(skb, dst);
}
#endif
/* Change in oif may mean change in hh_len. */
hh_len = skb_dst(skb)->dev->hard_header_len;
if (skb_headroom(skb) < hh_len &&
pskb_expand_head(skb, HH_DATA_ALIGN(hh_len - skb_headroom(skb)),
0, GFP_ATOMIC))
return -ENOMEM;
return 0;
}
EXPORT_SYMBOL(ip_route_me_harder);
int nf_ip_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
bool strict __always_unused)
{
struct rtable *rt = ip_route_output_key(net, &fl->u.ip4);
if (IS_ERR(rt))
return PTR_ERR(rt);
*dst = &rt->dst;
return 0;
}
EXPORT_SYMBOL_GPL(nf_ip_route);