xfrm4_state.c revision 227620e295090629fcb2c46ad3828222ab65438d
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * xfrm4_state.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Changes: 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * YOSHIFUJI Hideaki @USAGI 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Split up af-specific portion 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu#include <net/ip.h> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/xfrm.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pfkeyv2.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ipsec.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct xfrm_state_afinfo xfrm4_state_afinfo; 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xustatic int xfrm4_init_flags(struct xfrm_state *x) 18dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu{ 19dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu if (ipv4_config.no_pmtu_disc) 20dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu x->props.flags |= XFRM_STATE_NOPMTUDISC; 21dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu return 0; 22dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu} 23dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl, 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct xfrm_tmpl *tmpl, 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xfrm_address_t *daddr, xfrm_address_t *saddr) 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.daddr.a4 = fl->fl4_dst; 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.saddr.a4 = fl->fl4_src; 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.dport = xfrm_flowi_dport(fl); 328f83f23e6db8b9a9fe787d02f73489224668c4e2Al Viro x->sel.dport_mask = htons(0xffff); 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.sport = xfrm_flowi_sport(fl); 348f83f23e6db8b9a9fe787d02f73489224668c4e2Al Viro x->sel.sport_mask = htons(0xffff); 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.prefixlen_d = 32; 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.prefixlen_s = 32; 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.proto = fl->proto; 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->sel.ifindex = fl->oif; 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->id = tmpl->id; 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (x->id.daddr.a4 == 0) 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->id.daddr.a4 = daddr->a4; 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->props.saddr = tmpl->saddr; 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (x->props.saddr.a4 == 0) 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->props.saddr.a4 = saddr->a4; 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->props.mode = tmpl->mode; 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->props.reqid = tmpl->reqid; 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x->props.family = AF_INET; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5036cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xuint xfrm4_extract_header(struct sk_buff *skb) 5136cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu{ 5236cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu struct iphdr *iph = ip_hdr(skb); 5336cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu 5436cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu XFRM_MODE_SKB_CB(skb)->id = iph->id; 5536cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; 5636cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu XFRM_MODE_SKB_CB(skb)->tos = iph->tos; 5736cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; 5836cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu XFRM_MODE_SKB_CB(skb)->protocol = iph->protocol; 5936cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, 6036cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); 6136cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu 6236cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu return 0; 6336cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu} 6436cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct xfrm_state_afinfo xfrm4_state_afinfo = { 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .family = AF_INET, 6736cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu .proto = IPPROTO_IPIP, 68227620e295090629fcb2c46ad3828222ab65438dHerbert Xu .eth_proto = htons(ETH_P_IP), 6917c2a42a24e1e8dd6aa7cea4f84e034ab1bfff31Herbert Xu .owner = THIS_MODULE, 70dd87147eed934eaff92869f3d158697c7239d1d2Herbert Xu .init_flags = xfrm4_init_flags, 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .init_tempsel = __xfrm4_init_tempsel, 72cdca72652adf597f7fef821a27595fd0dd5eea19Miika Komu .output = xfrm4_output, 73227620e295090629fcb2c46ad3828222ab65438dHerbert Xu .extract_input = xfrm4_extract_input, 7436cf9acf93e8561d9faec24849e57688a81eb9c5Herbert Xu .extract_output = xfrm4_extract_output, 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init xfrm4_state_init(void) 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xfrm_state_register_afinfo(&xfrm4_state_afinfo); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 820742fd53a3774781255bd1e471e7aa2e4a82d5f7Adrian Bunk#if 0 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __exit xfrm4_state_fini(void) 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xfrm_state_unregister_afinfo(&xfrm4_state_afinfo); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 870742fd53a3774781255bd1e471e7aa2e4a82d5f7Adrian Bunk#endif /* 0 */ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 89