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3f87c08c61
We cannot make a direct call to nf_ip6_route() because that would result in autoloading the 'ipv6' module because of symbol dependencies. Therefore, define route 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>
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
#include <linux/kernel.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter_ipv6.h>
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__sum16 nf_checksum(struct sk_buff *skb, unsigned int hook,
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unsigned int dataoff, u_int8_t protocol,
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unsigned short family)
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{
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const struct nf_ipv6_ops *v6ops;
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__sum16 csum = 0;
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switch (family) {
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case AF_INET:
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csum = nf_ip_checksum(skb, hook, dataoff, protocol);
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break;
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case AF_INET6:
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v6ops = rcu_dereference(nf_ipv6_ops);
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if (v6ops)
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csum = v6ops->checksum(skb, hook, dataoff, protocol);
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break;
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}
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return csum;
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}
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EXPORT_SYMBOL_GPL(nf_checksum);
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__sum16 nf_checksum_partial(struct sk_buff *skb, unsigned int hook,
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unsigned int dataoff, unsigned int len,
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u_int8_t protocol, unsigned short family)
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{
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const struct nf_ipv6_ops *v6ops;
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__sum16 csum = 0;
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switch (family) {
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case AF_INET:
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csum = nf_ip_checksum_partial(skb, hook, dataoff, len,
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protocol);
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break;
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case AF_INET6:
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v6ops = rcu_dereference(nf_ipv6_ops);
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if (v6ops)
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csum = v6ops->checksum_partial(skb, hook, dataoff, len,
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protocol);
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break;
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}
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return csum;
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}
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EXPORT_SYMBOL_GPL(nf_checksum_partial);
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int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
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bool strict, unsigned short family)
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{
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const struct nf_ipv6_ops *v6ops;
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int ret = 0;
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switch (family) {
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case AF_INET:
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ret = nf_ip_route(net, dst, fl, strict);
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break;
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case AF_INET6:
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v6ops = rcu_dereference(nf_ipv6_ops);
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if (v6ops)
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ret = v6ops->route(net, dst, fl, strict);
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(nf_route);
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