| /* |
| * xfrm4_state.c |
| * |
| * Changes: |
| * YOSHIFUJI Hideaki @USAGI |
| * Split up af-specific portion |
| * |
| */ |
| |
| #include <net/ip.h> |
| #include <net/xfrm.h> |
| #include <linux/pfkeyv2.h> |
| #include <linux/ipsec.h> |
| |
| static struct xfrm_state_afinfo xfrm4_state_afinfo; |
| |
| static int xfrm4_init_flags(struct xfrm_state *x) |
| { |
| if (ipv4_config.no_pmtu_disc) |
| x->props.flags |= XFRM_STATE_NOPMTUDISC; |
| return 0; |
| } |
| |
| static void |
| __xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl, |
| struct xfrm_tmpl *tmpl, |
| xfrm_address_t *daddr, xfrm_address_t *saddr) |
| { |
| x->sel.daddr.a4 = fl->fl4_dst; |
| x->sel.saddr.a4 = fl->fl4_src; |
| x->sel.dport = xfrm_flowi_dport(fl); |
| x->sel.dport_mask = htons(0xffff); |
| x->sel.sport = xfrm_flowi_sport(fl); |
| x->sel.sport_mask = htons(0xffff); |
| x->sel.prefixlen_d = 32; |
| x->sel.prefixlen_s = 32; |
| x->sel.proto = fl->proto; |
| x->sel.ifindex = fl->oif; |
| x->id = tmpl->id; |
| if (x->id.daddr.a4 == 0) |
| x->id.daddr.a4 = daddr->a4; |
| x->props.saddr = tmpl->saddr; |
| if (x->props.saddr.a4 == 0) |
| x->props.saddr.a4 = saddr->a4; |
| x->props.mode = tmpl->mode; |
| x->props.reqid = tmpl->reqid; |
| x->props.family = AF_INET; |
| } |
| |
| int xfrm4_extract_header(struct sk_buff *skb) |
| { |
| struct iphdr *iph = ip_hdr(skb); |
| |
| XFRM_MODE_SKB_CB(skb)->id = iph->id; |
| XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; |
| XFRM_MODE_SKB_CB(skb)->tos = iph->tos; |
| XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; |
| XFRM_MODE_SKB_CB(skb)->protocol = iph->protocol; |
| memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, |
| sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); |
| |
| return 0; |
| } |
| |
| static struct xfrm_state_afinfo xfrm4_state_afinfo = { |
| .family = AF_INET, |
| .proto = IPPROTO_IPIP, |
| .eth_proto = htons(ETH_P_IP), |
| .owner = THIS_MODULE, |
| .init_flags = xfrm4_init_flags, |
| .init_tempsel = __xfrm4_init_tempsel, |
| .output = xfrm4_output, |
| .extract_input = xfrm4_extract_input, |
| .extract_output = xfrm4_extract_output, |
| }; |
| |
| void __init xfrm4_state_init(void) |
| { |
| xfrm_state_register_afinfo(&xfrm4_state_afinfo); |
| } |
| |
| #if 0 |
| void __exit xfrm4_state_fini(void) |
| { |
| xfrm_state_unregister_afinfo(&xfrm4_state_afinfo); |
| } |
| #endif /* 0 */ |
| |