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100 lines
2.4 KiB
100 lines
2.4 KiB
/* |
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* xfrm4_state.c |
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* |
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* Changes: |
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* YOSHIFUJI Hideaki @USAGI |
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* Split up af-specific portion |
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* |
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*/ |
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#include <net/ip.h> |
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#include <net/xfrm.h> |
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#include <linux/pfkeyv2.h> |
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#include <linux/ipsec.h> |
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#include <linux/netfilter_ipv4.h> |
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#include <linux/export.h> |
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static int xfrm4_init_flags(struct xfrm_state *x) |
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{ |
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if (xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc) |
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x->props.flags |= XFRM_STATE_NOPMTUDISC; |
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return 0; |
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} |
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static void |
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__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl) |
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{ |
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const struct flowi4 *fl4 = &fl->u.ip4; |
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sel->daddr.a4 = fl4->daddr; |
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sel->saddr.a4 = fl4->saddr; |
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sel->dport = xfrm_flowi_dport(fl, &fl4->uli); |
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sel->dport_mask = htons(0xffff); |
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sel->sport = xfrm_flowi_sport(fl, &fl4->uli); |
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sel->sport_mask = htons(0xffff); |
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sel->family = AF_INET; |
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sel->prefixlen_d = 32; |
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sel->prefixlen_s = 32; |
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sel->proto = fl4->flowi4_proto; |
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sel->ifindex = fl4->flowi4_oif; |
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} |
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static void |
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xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl, |
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const xfrm_address_t *daddr, const xfrm_address_t *saddr) |
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{ |
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x->id = tmpl->id; |
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if (x->id.daddr.a4 == 0) |
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x->id.daddr.a4 = daddr->a4; |
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x->props.saddr = tmpl->saddr; |
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if (x->props.saddr.a4 == 0) |
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x->props.saddr.a4 = saddr->a4; |
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x->props.mode = tmpl->mode; |
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x->props.reqid = tmpl->reqid; |
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x->props.family = AF_INET; |
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} |
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int xfrm4_extract_header(struct sk_buff *skb) |
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{ |
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const struct iphdr *iph = ip_hdr(skb); |
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XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); |
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XFRM_MODE_SKB_CB(skb)->id = iph->id; |
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XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; |
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XFRM_MODE_SKB_CB(skb)->tos = iph->tos; |
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XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; |
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XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph); |
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memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, |
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sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); |
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return 0; |
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} |
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static struct xfrm_state_afinfo xfrm4_state_afinfo = { |
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.family = AF_INET, |
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.proto = IPPROTO_IPIP, |
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.eth_proto = htons(ETH_P_IP), |
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.owner = THIS_MODULE, |
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.init_flags = xfrm4_init_flags, |
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.init_tempsel = __xfrm4_init_tempsel, |
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.init_temprop = xfrm4_init_temprop, |
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.output = xfrm4_output, |
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.output_finish = xfrm4_output_finish, |
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.extract_input = xfrm4_extract_input, |
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.extract_output = xfrm4_extract_output, |
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.transport_finish = xfrm4_transport_finish, |
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.local_error = xfrm4_local_error, |
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}; |
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void __init xfrm4_state_init(void) |
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{ |
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xfrm_state_register_afinfo(&xfrm4_state_afinfo); |
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} |
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#if 0 |
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void __exit xfrm4_state_fini(void) |
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{ |
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xfrm_state_unregister_afinfo(&xfrm4_state_afinfo); |
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} |
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#endif /* 0 */ |
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