projects / linux-block.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> |
| 1da177e4 LT |
15 | |
| 16 | static struct xfrm_state_afinfo xfrm4_state_afinfo; | |
| 17 | ||
| dd87147e HX |
18 | static int xfrm4_init_flags(struct xfrm_state *x) |
| 19 | { | |
| 20 | if (ipv4_config.no_pmtu_disc) | |
| 21 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
| 22 | return 0; | |
| 23 | } | |
| 24 | ||
| 1da177e4 LT |
25 | static void |
| 26 | __xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl, | |
| 27 | struct xfrm_tmpl *tmpl, | |
| 28 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
| 29 | { | |
| 30 | x->sel.daddr.a4 = fl->fl4_dst; | |
| 31 | x->sel.saddr.a4 = fl->fl4_src; | |
| 32 | x->sel.dport = xfrm_flowi_dport(fl); | |
| 8f83f23e | 33 | x->sel.dport_mask = htons(0xffff); |
| 1da177e4 | 34 | x->sel.sport = xfrm_flowi_sport(fl); |
| 8f83f23e | 35 | x->sel.sport_mask = htons(0xffff); |
| 1da177e4 LT |
36 | x->sel.prefixlen_d = 32; |
| 37 | x->sel.prefixlen_s = 32; | |
| 38 | x->sel.proto = fl->proto; | |
| 39 | x->sel.ifindex = fl->oif; | |
| 40 | x->id = tmpl->id; | |
| 41 | if (x->id.daddr.a4 == 0) | |
| 42 | x->id.daddr.a4 = daddr->a4; | |
| 43 | x->props.saddr = tmpl->saddr; | |
| 44 | if (x->props.saddr.a4 == 0) | |
| 45 | x->props.saddr.a4 = saddr->a4; | |
| 46 | x->props.mode = tmpl->mode; | |
| 47 | x->props.reqid = tmpl->reqid; | |
| 48 | x->props.family = AF_INET; | |
| 49 | } | |
| 50 | ||
| 36cf9acf HX |
51 | int xfrm4_extract_header(struct sk_buff *skb) |
| 52 | { | |
| 53 | struct iphdr *iph = ip_hdr(skb); | |
| 54 | ||
| 732c8bd5 | 55 | XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); |
| 36cf9acf HX |
56 | XFRM_MODE_SKB_CB(skb)->id = iph->id; |
| 57 | XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; | |
| 58 | XFRM_MODE_SKB_CB(skb)->tos = iph->tos; | |
| 59 | XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; | |
| 732c8bd5 | 60 | XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph); |
| 36cf9acf HX |
61 | memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, |
| 62 | sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); | |
| 63 | ||
| 64 | return 0; | |
| 65 | } | |
| 66 | ||
| 1da177e4 LT |
67 | static struct xfrm_state_afinfo xfrm4_state_afinfo = { |
| 68 | .family = AF_INET, | |
| 36cf9acf | 69 | .proto = IPPROTO_IPIP, |
| 227620e2 | 70 | .eth_proto = htons(ETH_P_IP), |
| 17c2a42a | 71 | .owner = THIS_MODULE, |
| dd87147e | 72 | .init_flags = xfrm4_init_flags, |
| 1da177e4 | 73 | .init_tempsel = __xfrm4_init_tempsel, |
| cdca7265 | 74 | .output = xfrm4_output, |
| 227620e2 | 75 | .extract_input = xfrm4_extract_input, |
| 36cf9acf | 76 | .extract_output = xfrm4_extract_output, |
| 716062fd | 77 | .transport_finish = xfrm4_transport_finish, |
| 1da177e4 LT |
78 | }; |
| 79 | ||
| 80 | void __init xfrm4_state_init(void) | |
| 81 | { | |
| 82 | xfrm_state_register_afinfo(&xfrm4_state_afinfo); | |
| 83 | } | |
| 84 | ||
| 0742fd53 | 85 | #if 0 |
| 1da177e4 LT |
86 | void __exit xfrm4_state_fini(void) |
| 87 | { | |
| 88 | xfrm_state_unregister_afinfo(&xfrm4_state_afinfo); | |
| 89 | } | |
| 0742fd53 | 90 | #endif /* 0 */ |
| 1da177e4 | 91 |