projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 1da177e4 LT |
2 | /* |
| 3 | * xfrm4_state.c | |
| 4 | * | |
| 5 | * Changes: | |
| 6 | * YOSHIFUJI Hideaki @USAGI | |
| 7 | * Split up af-specific portion | |
| 8 | * | |
| 9 | */ | |
| 10 | ||
| dd87147e | 11 | #include <net/ip.h> |
| 1da177e4 LT |
12 | #include <net/xfrm.h> |
| 13 | #include <linux/pfkeyv2.h> | |
| 14 | #include <linux/ipsec.h> | |
| 862b82c6 | 15 | #include <linux/netfilter_ipv4.h> |
| bc3b2d7f | 16 | #include <linux/export.h> |
| 1da177e4 | 17 | |
| dd87147e HX |
18 | static int xfrm4_init_flags(struct xfrm_state *x) |
| 19 | { | |
| 974eda11 | 20 | if (xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc) |
| dd87147e HX |
21 | x->props.flags |= XFRM_STATE_NOPMTUDISC; |
| 22 | return 0; | |
| 23 | } | |
| 24 | ||
| 1da177e4 | 25 | static void |
| 73e5ebb2 | 26 | __xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl) |
| 8444cf71 | 27 | { |
| 7e1dc7b6 DM |
28 | const struct flowi4 *fl4 = &fl->u.ip4; |
| 29 | ||
| 30 | sel->daddr.a4 = fl4->daddr; | |
| 31 | sel->saddr.a4 = fl4->saddr; | |
| 32 | sel->dport = xfrm_flowi_dport(fl, &fl4->uli); | |
| 8444cf71 | 33 | sel->dport_mask = htons(0xffff); |
| 7e1dc7b6 | 34 | sel->sport = xfrm_flowi_sport(fl, &fl4->uli); |
| 8444cf71 TE |
35 | sel->sport_mask = htons(0xffff); |
| 36 | sel->family = AF_INET; | |
| 37 | sel->prefixlen_d = 32; | |
| 38 | sel->prefixlen_s = 32; | |
| 7e1dc7b6 DM |
39 | sel->proto = fl4->flowi4_proto; |
| 40 | sel->ifindex = fl4->flowi4_oif; | |
| 8444cf71 TE |
41 | } |
| 42 | ||
| 43 | static void | |
| 19bd6244 DM |
44 | xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl, |
| 45 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
| 1da177e4 | 46 | { |
| 1da177e4 LT |
47 | x->id = tmpl->id; |
| 48 | if (x->id.daddr.a4 == 0) | |
| 49 | x->id.daddr.a4 = daddr->a4; | |
| 50 | x->props.saddr = tmpl->saddr; | |
| 51 | if (x->props.saddr.a4 == 0) | |
| 52 | x->props.saddr.a4 = saddr->a4; | |
| 53 | x->props.mode = tmpl->mode; | |
| 54 | x->props.reqid = tmpl->reqid; | |
| 55 | x->props.family = AF_INET; | |
| 56 | } | |
| 57 | ||
| 36cf9acf HX |
58 | int xfrm4_extract_header(struct sk_buff *skb) |
| 59 | { | |
| b71d1d42 | 60 | const struct iphdr *iph = ip_hdr(skb); |
| 36cf9acf | 61 | |
| 732c8bd5 | 62 | XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); |
| 36cf9acf HX |
63 | XFRM_MODE_SKB_CB(skb)->id = iph->id; |
| 64 | XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; | |
| 65 | XFRM_MODE_SKB_CB(skb)->tos = iph->tos; | |
| 66 | XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; | |
| 732c8bd5 | 67 | XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph); |
| 36cf9acf HX |
68 | memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, |
| 69 | sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); | |
| 70 | ||
| 71 | return 0; | |
| 72 | } | |
| 73 | ||
| 1da177e4 LT |
74 | static struct xfrm_state_afinfo xfrm4_state_afinfo = { |
| 75 | .family = AF_INET, | |
| 36cf9acf | 76 | .proto = IPPROTO_IPIP, |
| 227620e2 | 77 | .eth_proto = htons(ETH_P_IP), |
| 17c2a42a | 78 | .owner = THIS_MODULE, |
| dd87147e | 79 | .init_flags = xfrm4_init_flags, |
| 1da177e4 | 80 | .init_tempsel = __xfrm4_init_tempsel, |
| 8444cf71 | 81 | .init_temprop = xfrm4_init_temprop, |
| cdca7265 | 82 | .output = xfrm4_output, |
| 43a4dea4 | 83 | .output_finish = xfrm4_output_finish, |
| 227620e2 | 84 | .extract_input = xfrm4_extract_input, |
| 36cf9acf | 85 | .extract_output = xfrm4_extract_output, |
| 716062fd | 86 | .transport_finish = xfrm4_transport_finish, |
| 628e341f | 87 | .local_error = xfrm4_local_error, |
| 1da177e4 LT |
88 | }; |
| 89 | ||
| 90 | void __init xfrm4_state_init(void) | |
| 91 | { | |
| 92 | xfrm_state_register_afinfo(&xfrm4_state_afinfo); | |
| 93 | } |