1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * xfrm4_state.c
 4 *
 5 * Changes:
 6 * 	YOSHIFUJI Hideaki @USAGI
 7 * 		Split up af-specific portion
 8 *
 9 */
10
 
11#include <net/xfrm.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
12
13static struct xfrm_state_afinfo xfrm4_state_afinfo = {
14	.family			= AF_INET,
15	.proto			= IPPROTO_IPIP,
 
 
 
 
 
16	.output			= xfrm4_output,
 
 
 
17	.transport_finish	= xfrm4_transport_finish,
18	.local_error		= xfrm4_local_error,
19};
20
21void __init xfrm4_state_init(void)
22{
23	xfrm_state_register_afinfo(&xfrm4_state_afinfo);
24}

 
 1/*
 2 * xfrm4_state.c
 3 *
 4 * Changes:
 5 * 	YOSHIFUJI Hideaki @USAGI
 6 * 		Split up af-specific portion
 7 *
 8 */
 9
10#include <net/ip.h>
11#include <net/xfrm.h>
12#include <linux/pfkeyv2.h>
13#include <linux/ipsec.h>
14#include <linux/netfilter_ipv4.h>
15
16static int xfrm4_init_flags(struct xfrm_state *x)
17{
18	if (ipv4_config.no_pmtu_disc)
19		x->props.flags |= XFRM_STATE_NOPMTUDISC;
20	return 0;
21}
22
23static void
24__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
25{
26	const struct flowi4 *fl4 = &fl->u.ip4;
27
28	sel->daddr.a4 = fl4->daddr;
29	sel->saddr.a4 = fl4->saddr;
30	sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
31	sel->dport_mask = htons(0xffff);
32	sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
33	sel->sport_mask = htons(0xffff);
34	sel->family = AF_INET;
35	sel->prefixlen_d = 32;
36	sel->prefixlen_s = 32;
37	sel->proto = fl4->flowi4_proto;
38	sel->ifindex = fl4->flowi4_oif;
39}
40
41static void
42xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
43		   const xfrm_address_t *daddr, const xfrm_address_t *saddr)
44{
45	x->id = tmpl->id;
46	if (x->id.daddr.a4 == 0)
47		x->id.daddr.a4 = daddr->a4;
48	x->props.saddr = tmpl->saddr;
49	if (x->props.saddr.a4 == 0)
50		x->props.saddr.a4 = saddr->a4;
51	x->props.mode = tmpl->mode;
52	x->props.reqid = tmpl->reqid;
53	x->props.family = AF_INET;
54}
55
56int xfrm4_extract_header(struct sk_buff *skb)
57{
58	const struct iphdr *iph = ip_hdr(skb);
59
60	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
61	XFRM_MODE_SKB_CB(skb)->id = iph->id;
62	XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
63	XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
64	XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
65	XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
66	memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
67	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
68
69	return 0;
70}
71
72static struct xfrm_state_afinfo xfrm4_state_afinfo = {
73	.family			= AF_INET,
74	.proto			= IPPROTO_IPIP,
75	.eth_proto		= htons(ETH_P_IP),
76	.owner			= THIS_MODULE,
77	.init_flags		= xfrm4_init_flags,
78	.init_tempsel		= __xfrm4_init_tempsel,
79	.init_temprop		= xfrm4_init_temprop,
80	.output			= xfrm4_output,
81	.output_finish		= xfrm4_output_finish,
82	.extract_input		= xfrm4_extract_input,
83	.extract_output		= xfrm4_extract_output,
84	.transport_finish	= xfrm4_transport_finish,
 
85};
86
87void __init xfrm4_state_init(void)
88{
89	xfrm_state_register_afinfo(&xfrm4_state_afinfo);
90}
91
92#if 0
93void __exit xfrm4_state_fini(void)
94{
95	xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
96}
97#endif  /*  0  */
98