projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * xfrm4_state.c | |
| 3 | * | |
| 4 | * Changes: | |
| 5 | * YOSHIFUJI Hideaki @USAGI | |
| 6 | * Split up af-specific portion | |
| 7 | * | |
| 8 | */ | |
| 9 | ||
| dd87147e | 10 | #include <net/ip.h> |
| 1da177e4 LT |
11 | #include <net/xfrm.h> |
| 12 | #include <linux/pfkeyv2.h> | |
| 13 | #include <linux/ipsec.h> | |
| 862b82c6 | 14 | #include <linux/netfilter_ipv4.h> |
| bc3b2d7f | 15 | #include <linux/export.h> |
| 1da177e4 | 16 | |
| dd87147e HX |
17 | static int xfrm4_init_flags(struct xfrm_state *x) |
| 18 | { | |
| 19 | if (ipv4_config.no_pmtu_disc) | |
| 20 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
| 21 | return 0; | |
| 22 | } | |
| 23 | ||
| 1da177e4 | 24 | static void |
| 73e5ebb2 | 25 | __xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl) |
| 8444cf71 | 26 | { |
| 7e1dc7b6 DM |
27 | const struct flowi4 *fl4 = &fl->u.ip4; |
| 28 | ||
| 29 | sel->daddr.a4 = fl4->daddr; | |
| 30 | sel->saddr.a4 = fl4->saddr; | |
| 31 | sel->dport = xfrm_flowi_dport(fl, &fl4->uli); | |
| 8444cf71 | 32 | sel->dport_mask = htons(0xffff); |
| 7e1dc7b6 | 33 | sel->sport = xfrm_flowi_sport(fl, &fl4->uli); |
| 8444cf71 TE |
34 | sel->sport_mask = htons(0xffff); |
| 35 | sel->family = AF_INET; | |
| 36 | sel->prefixlen_d = 32; | |
| 37 | sel->prefixlen_s = 32; | |
| 7e1dc7b6 DM |
38 | sel->proto = fl4->flowi4_proto; |
| 39 | sel->ifindex = fl4->flowi4_oif; | |
| 8444cf71 TE |
40 | } |
| 41 | ||
| 42 | static void | |
| 19bd6244 DM |
43 | xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl, |
| 44 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
| 1da177e4 | 45 | { |
| 1da177e4 LT |
46 | x->id = tmpl->id; |
| 47 | if (x->id.daddr.a4 == 0) | |
| 48 | x->id.daddr.a4 = daddr->a4; | |
| 49 | x->props.saddr = tmpl->saddr; | |
| 50 | if (x->props.saddr.a4 == 0) | |
| 51 | x->props.saddr.a4 = saddr->a4; | |
| 52 | x->props.mode = tmpl->mode; | |
| 53 | x->props.reqid = tmpl->reqid; | |
| 54 | x->props.family = AF_INET; | |
| 55 | } | |
| 56 | ||
| 36cf9acf HX |
57 | int xfrm4_extract_header(struct sk_buff *skb) |
| 58 | { | |
| b71d1d42 | 59 | const struct iphdr *iph = ip_hdr(skb); |
| 36cf9acf | 60 | |
| 732c8bd5 | 61 | XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); |
| 36cf9acf HX |
62 | XFRM_MODE_SKB_CB(skb)->id = iph->id; |
| 63 | XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; | |
| 64 | XFRM_MODE_SKB_CB(skb)->tos = iph->tos; | |
| 65 | XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; | |
| 732c8bd5 | 66 | XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph); |
| 36cf9acf HX |
67 | memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, |
| 68 | sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); | |
| 69 | ||
| 70 | return 0; | |
| 71 | } | |
| 72 | ||
| 1da177e4 LT |
73 | static struct xfrm_state_afinfo xfrm4_state_afinfo = { |
| 74 | .family = AF_INET, | |
| 36cf9acf | 75 | .proto = IPPROTO_IPIP, |
| 227620e2 | 76 | .eth_proto = htons(ETH_P_IP), |
| 17c2a42a | 77 | .owner = THIS_MODULE, |
| dd87147e | 78 | .init_flags = xfrm4_init_flags, |
| 1da177e4 | 79 | .init_tempsel = __xfrm4_init_tempsel, |
| 8444cf71 | 80 | .init_temprop = xfrm4_init_temprop, |
| cdca7265 | 81 | .output = xfrm4_output, |
| 43a4dea4 | 82 | .output_finish = xfrm4_output_finish, |
| 227620e2 | 83 | .extract_input = xfrm4_extract_input, |
| 36cf9acf | 84 | .extract_output = xfrm4_extract_output, |
| 716062fd | 85 | .transport_finish = xfrm4_transport_finish, |
| 1da177e4 LT |
86 | }; |
| 87 | ||
| 88 | void __init xfrm4_state_init(void) | |
| 89 | { | |
| 90 | xfrm_state_register_afinfo(&xfrm4_state_afinfo); | |
| 91 | } | |
| 92 | ||
| 0742fd53 | 93 | #if 0 |
| 1da177e4 LT |
94 | void __exit xfrm4_state_fini(void) |
| 95 | { | |
| 96 | xfrm_state_unregister_afinfo(&xfrm4_state_afinfo); | |
| 97 | } | |
| 0742fd53 | 98 | #endif /* 0 */ |
| 1da177e4 | 99 |