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linux/net/ipv4/xfrm4_state.c
Patrick McHardy 6e23ae2a48 [NETFILTER]: Introduce NF_INET_ hook values
The IPv4 and IPv6 hook values are identical, yet some code tries to figure
out the "correct" value by looking at the address family. Introduce NF_INET_*
values for both IPv4 and IPv6. The old values are kept in a #ifndef __KERNEL__
section for userspace compatibility.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:53:55 -08:00

91 lines
2.1 KiB
C

/*
* xfrm4_state.c
*
* Changes:
* YOSHIFUJI Hideaki @USAGI
* Split up af-specific portion
*
*/
#include <net/ip.h>
#include <net/xfrm.h>
#include <linux/pfkeyv2.h>
#include <linux/ipsec.h>
#include <linux/netfilter_ipv4.h>
static struct xfrm_state_afinfo xfrm4_state_afinfo;
static int xfrm4_init_flags(struct xfrm_state *x)
{
if (ipv4_config.no_pmtu_disc)
x->props.flags |= XFRM_STATE_NOPMTUDISC;
return 0;
}
static void
__xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl,
struct xfrm_tmpl *tmpl,
xfrm_address_t *daddr, xfrm_address_t *saddr)
{
x->sel.daddr.a4 = fl->fl4_dst;
x->sel.saddr.a4 = fl->fl4_src;
x->sel.dport = xfrm_flowi_dport(fl);
x->sel.dport_mask = htons(0xffff);
x->sel.sport = xfrm_flowi_sport(fl);
x->sel.sport_mask = htons(0xffff);
x->sel.prefixlen_d = 32;
x->sel.prefixlen_s = 32;
x->sel.proto = fl->proto;
x->sel.ifindex = fl->oif;
x->id = tmpl->id;
if (x->id.daddr.a4 == 0)
x->id.daddr.a4 = daddr->a4;
x->props.saddr = tmpl->saddr;
if (x->props.saddr.a4 == 0)
x->props.saddr.a4 = saddr->a4;
x->props.mode = tmpl->mode;
x->props.reqid = tmpl->reqid;
x->props.family = AF_INET;
}
int xfrm4_extract_header(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
XFRM_MODE_SKB_CB(skb)->id = iph->id;
XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
return 0;
}
static struct xfrm_state_afinfo xfrm4_state_afinfo = {
.family = AF_INET,
.proto = IPPROTO_IPIP,
.eth_proto = htons(ETH_P_IP),
.nf_post_routing = NF_INET_POST_ROUTING,
.owner = THIS_MODULE,
.init_flags = xfrm4_init_flags,
.init_tempsel = __xfrm4_init_tempsel,
.output = xfrm4_output,
.extract_input = xfrm4_extract_input,
.extract_output = xfrm4_extract_output,
.transport_finish = xfrm4_transport_finish,
};
void __init xfrm4_state_init(void)
{
xfrm_state_register_afinfo(&xfrm4_state_afinfo);
}
#if 0
void __exit xfrm4_state_fini(void)
{
xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
}
#endif /* 0 */