author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
1 |
#include <linux/kernel.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
2 |
#include <linux/init.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
3 |
#include <linux/ipv6.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
4 |
#include <linux/netfilter.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
5 |
#include <linux/netfilter_ipv6.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
6 |
#include <net/dst.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
7 |
#include <net/ipv6.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
8 |
#include <net/ip6_route.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
9 |
#include <net/xfrm.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
10 |
#include <net/ip6_checksum.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
11 |
#include <net/netfilter/nf_queue.h> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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12 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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13 |
int ip6_route_me_harder(struct sk_buff *skb) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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14 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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15 |
struct net *net = dev_net(skb->dst->dev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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16 |
struct ipv6hdr *iph = ipv6_hdr(skb); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
17 |
struct dst_entry *dst; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
18 |
struct flowi fl = { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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19 |
.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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20 |
.mark = skb->mark, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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21 |
.nl_u = |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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22 |
{ .ip6_u = |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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23 |
{ .daddr = iph->daddr, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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24 |
.saddr = iph->saddr, } }, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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25 |
}; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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26 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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27 |
dst = ip6_route_output(net, skb->sk, &fl); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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28 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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29 |
#ifdef CONFIG_XFRM |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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30 |
if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) && |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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31 |
xfrm_decode_session(skb, &fl, AF_INET6) == 0) |
2 | 32 |
if (xfrm_lookup(net, &skb->dst, &fl, skb->sk, 0)) |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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33 |
return -1; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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34 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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35 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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36 |
if (dst->error) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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37 |
IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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38 |
LIMIT_NETDEBUG(KERN_DEBUG "ip6_route_me_harder: No more route.\n"); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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39 |
dst_release(dst); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
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40 |
return -EINVAL; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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41 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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42 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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43 |
/* Drop old route. */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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44 |
dst_release(skb->dst); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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45 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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46 |
skb->dst = dst; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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47 |
return 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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48 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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49 |
EXPORT_SYMBOL(ip6_route_me_harder); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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50 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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51 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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52 |
* Extra routing may needed on local out, as the QUEUE target never |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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53 |
* returns control to the table. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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54 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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55 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
56 |
struct ip6_rt_info { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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57 |
struct in6_addr daddr; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
58 |
struct in6_addr saddr; |
2 | 59 |
u_int32_t mark; |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
60 |
}; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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61 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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62 |
static void nf_ip6_saveroute(const struct sk_buff *skb, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
63 |
struct nf_queue_entry *entry) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
64 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
65 |
struct ip6_rt_info *rt_info = nf_queue_entry_reroute(entry); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
66 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
67 |
if (entry->hook == NF_INET_LOCAL_OUT) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
68 |
struct ipv6hdr *iph = ipv6_hdr(skb); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
69 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
70 |
rt_info->daddr = iph->daddr; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
71 |
rt_info->saddr = iph->saddr; |
2 | 72 |
rt_info->mark = skb->mark; |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
73 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
74 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
75 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
76 |
static int nf_ip6_reroute(struct sk_buff *skb, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
77 |
const struct nf_queue_entry *entry) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
78 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
79 |
struct ip6_rt_info *rt_info = nf_queue_entry_reroute(entry); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
80 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
81 |
if (entry->hook == NF_INET_LOCAL_OUT) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
82 |
struct ipv6hdr *iph = ipv6_hdr(skb); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
83 |
if (!ipv6_addr_equal(&iph->daddr, &rt_info->daddr) || |
2 | 84 |
!ipv6_addr_equal(&iph->saddr, &rt_info->saddr) || |
85 |
skb->mark != rt_info->mark) |
|
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
86 |
return ip6_route_me_harder(skb); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
87 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
88 |
return 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
89 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
90 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
91 |
static int nf_ip6_route(struct dst_entry **dst, struct flowi *fl) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
92 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
93 |
*dst = ip6_route_output(&init_net, NULL, fl); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
94 |
return (*dst)->error; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
95 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
96 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
97 |
__sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
98 |
unsigned int dataoff, u_int8_t protocol) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
99 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
100 |
struct ipv6hdr *ip6h = ipv6_hdr(skb); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
101 |
__sum16 csum = 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
102 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
103 |
switch (skb->ip_summed) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
104 |
case CHECKSUM_COMPLETE: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
105 |
if (hook != NF_INET_PRE_ROUTING && hook != NF_INET_LOCAL_IN) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
106 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
107 |
if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
108 |
skb->len - dataoff, protocol, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
109 |
csum_sub(skb->csum, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
110 |
skb_checksum(skb, 0, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
111 |
dataoff, 0)))) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
112 |
skb->ip_summed = CHECKSUM_UNNECESSARY; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
113 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
114 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
115 |
/* fall through */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
116 |
case CHECKSUM_NONE: |
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skb->csum = ~csum_unfold( |
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csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, |
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skb->len - dataoff, |
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120 |
protocol, |
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csum_sub(0, |
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skb_checksum(skb, 0, |
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123 |
dataoff, 0)))); |
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csum = __skb_checksum_complete(skb); |
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125 |
} |
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126 |
return csum; |
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127 |
} |
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128 |
EXPORT_SYMBOL(nf_ip6_checksum); |
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129 |
|
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static __sum16 nf_ip6_checksum_partial(struct sk_buff *skb, unsigned int hook, |
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131 |
unsigned int dataoff, unsigned int len, |
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132 |
u_int8_t protocol) |
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133 |
{ |
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struct ipv6hdr *ip6h = ipv6_hdr(skb); |
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135 |
__wsum hsum; |
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136 |
__sum16 csum = 0; |
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137 |
|
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138 |
switch (skb->ip_summed) { |
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139 |
case CHECKSUM_COMPLETE: |
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if (len == skb->len - dataoff) |
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141 |
return nf_ip6_checksum(skb, hook, dataoff, protocol); |
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142 |
/* fall through */ |
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143 |
case CHECKSUM_NONE: |
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144 |
hsum = skb_checksum(skb, 0, dataoff, 0); |
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145 |
skb->csum = ~csum_unfold(csum_ipv6_magic(&ip6h->saddr, |
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146 |
&ip6h->daddr, |
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147 |
skb->len - dataoff, |
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148 |
protocol, |
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149 |
csum_sub(0, hsum))); |
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150 |
skb->ip_summed = CHECKSUM_NONE; |
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151 |
csum = __skb_checksum_complete_head(skb, dataoff + len); |
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152 |
if (!csum) |
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153 |
skb->ip_summed = CHECKSUM_UNNECESSARY; |
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154 |
} |
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155 |
return csum; |
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156 |
}; |
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157 |
|
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158 |
static const struct nf_afinfo nf_ip6_afinfo = { |
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159 |
.family = AF_INET6, |
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160 |
.checksum = nf_ip6_checksum, |
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161 |
.checksum_partial = nf_ip6_checksum_partial, |
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162 |
.route = nf_ip6_route, |
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163 |
.saveroute = nf_ip6_saveroute, |
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164 |
.reroute = nf_ip6_reroute, |
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165 |
.route_key_size = sizeof(struct ip6_rt_info), |
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parents:
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166 |
}; |
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|
167 |
|
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168 |
int __init ipv6_netfilter_init(void) |
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169 |
{ |
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170 |
return nf_register_afinfo(&nf_ip6_afinfo); |
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171 |
} |
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parents:
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|
172 |
|
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173 |
/* This can be called from inet6_init() on errors, so it cannot |
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174 |
* be marked __exit. -DaveM |
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175 |
*/ |
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parents:
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|
176 |
void ipv6_netfilter_fini(void) |
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|
177 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
178 |
nf_unregister_afinfo(&nf_ip6_afinfo); |
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parents:
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|
179 |
} |