ce388f452f
We cannot make a direct call to nf_ip6_reroute() because that would result in autoloading the 'ipv6' module because of symbol dependencies. Therefore, define reroute indirection in nf_ipv6_ops where this really belongs to. For IPv4, we can indeed make a direct function call, which is faster, given IPv4 is built-in in the networking code by default. Still, CONFIG_INET=n and CONFIG_NETFILTER=y is possible, so define empty inline stub for IPv4 in such case. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/netfilter.h>
|
|
#include <linux/netfilter_ipv4.h>
|
|
#include <linux/netfilter_ipv6.h>
|
|
#include <net/netfilter/nf_queue.h>
|
|
|
|
__sum16 nf_checksum(struct sk_buff *skb, unsigned int hook,
|
|
unsigned int dataoff, u_int8_t protocol,
|
|
unsigned short family)
|
|
{
|
|
const struct nf_ipv6_ops *v6ops;
|
|
__sum16 csum = 0;
|
|
|
|
switch (family) {
|
|
case AF_INET:
|
|
csum = nf_ip_checksum(skb, hook, dataoff, protocol);
|
|
break;
|
|
case AF_INET6:
|
|
v6ops = rcu_dereference(nf_ipv6_ops);
|
|
if (v6ops)
|
|
csum = v6ops->checksum(skb, hook, dataoff, protocol);
|
|
break;
|
|
}
|
|
|
|
return csum;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_checksum);
|
|
|
|
__sum16 nf_checksum_partial(struct sk_buff *skb, unsigned int hook,
|
|
unsigned int dataoff, unsigned int len,
|
|
u_int8_t protocol, unsigned short family)
|
|
{
|
|
const struct nf_ipv6_ops *v6ops;
|
|
__sum16 csum = 0;
|
|
|
|
switch (family) {
|
|
case AF_INET:
|
|
csum = nf_ip_checksum_partial(skb, hook, dataoff, len,
|
|
protocol);
|
|
break;
|
|
case AF_INET6:
|
|
v6ops = rcu_dereference(nf_ipv6_ops);
|
|
if (v6ops)
|
|
csum = v6ops->checksum_partial(skb, hook, dataoff, len,
|
|
protocol);
|
|
break;
|
|
}
|
|
|
|
return csum;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_checksum_partial);
|
|
|
|
int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
|
|
bool strict, unsigned short family)
|
|
{
|
|
const struct nf_ipv6_ops *v6ops;
|
|
int ret = 0;
|
|
|
|
switch (family) {
|
|
case AF_INET:
|
|
ret = nf_ip_route(net, dst, fl, strict);
|
|
break;
|
|
case AF_INET6:
|
|
v6ops = rcu_dereference(nf_ipv6_ops);
|
|
if (v6ops)
|
|
ret = v6ops->route(net, dst, fl, strict);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_route);
|
|
|
|
int nf_reroute(struct sk_buff *skb, struct nf_queue_entry *entry)
|
|
{
|
|
const struct nf_ipv6_ops *v6ops;
|
|
int ret = 0;
|
|
|
|
switch (entry->state.pf) {
|
|
case AF_INET:
|
|
ret = nf_ip_reroute(skb, entry);
|
|
break;
|
|
case AF_INET6:
|
|
v6ops = rcu_dereference(nf_ipv6_ops);
|
|
if (v6ops)
|
|
ret = v6ops->reroute(skb, entry);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|