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- /*
- * 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>
- #include <linux/export.h>
- static int xfrm4_init_flags(struct xfrm_state *x)
- {
- if (xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc)
- x->props.flags |= XFRM_STATE_NOPMTUDISC;
- return 0;
- }
- static void
- __xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
- {
- const struct flowi4 *fl4 = &fl->u.ip4;
- sel->daddr.a4 = fl4->daddr;
- sel->saddr.a4 = fl4->saddr;
- sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
- sel->dport_mask = htons(0xffff);
- sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
- sel->sport_mask = htons(0xffff);
- sel->family = AF_INET;
- sel->prefixlen_d = 32;
- sel->prefixlen_s = 32;
- sel->proto = fl4->flowi4_proto;
- sel->ifindex = fl4->flowi4_oif;
- }
- static void
- xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
- const xfrm_address_t *daddr, const xfrm_address_t *saddr)
- {
- 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)
- {
- const struct iphdr *iph = ip_hdr(skb);
- XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
- 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;
- XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
- 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),
- .owner = THIS_MODULE,
- .init_flags = xfrm4_init_flags,
- .init_tempsel = __xfrm4_init_tempsel,
- .init_temprop = xfrm4_init_temprop,
- .output = xfrm4_output,
- .output_finish = xfrm4_output_finish,
- .extract_input = xfrm4_extract_input,
- .extract_output = xfrm4_extract_output,
- .transport_finish = xfrm4_transport_finish,
- .local_error = xfrm4_local_error,
- };
- 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 */
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