11da177e4SLinus Torvalds /* xfrm_user.c: User interface to configure xfrm engine. 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Copyright (C) 2002 David S. Miller (davem@redhat.com) 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Changes: 61da177e4SLinus Torvalds * Mitsuru KANDA @USAGI 71da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI 81da177e4SLinus Torvalds * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 91da177e4SLinus Torvalds * IPv6 support 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds #include <linux/module.h> 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/types.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/socket.h> 181da177e4SLinus Torvalds #include <linux/string.h> 191da177e4SLinus Torvalds #include <linux/net.h> 201da177e4SLinus Torvalds #include <linux/skbuff.h> 211da177e4SLinus Torvalds #include <linux/rtnetlink.h> 221da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 231da177e4SLinus Torvalds #include <linux/ipsec.h> 241da177e4SLinus Torvalds #include <linux/init.h> 251da177e4SLinus Torvalds #include <linux/security.h> 261da177e4SLinus Torvalds #include <net/sock.h> 271da177e4SLinus Torvalds #include <net/xfrm.h> 2888fc2c84SThomas Graf #include <net/netlink.h> 291da177e4SLinus Torvalds #include <asm/uaccess.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) 321da177e4SLinus Torvalds { 331da177e4SLinus Torvalds struct rtattr *rt = xfrma[type - 1]; 341da177e4SLinus Torvalds struct xfrm_algo *algp; 3531c26852SHerbert Xu int len; 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds if (!rt) 381da177e4SLinus Torvalds return 0; 391da177e4SLinus Torvalds 4031c26852SHerbert Xu len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); 4131c26852SHerbert Xu if (len < 0) 421da177e4SLinus Torvalds return -EINVAL; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds algp = RTA_DATA(rt); 4531c26852SHerbert Xu 4631c26852SHerbert Xu len -= (algp->alg_key_len + 7U) / 8; 4731c26852SHerbert Xu if (len < 0) 4831c26852SHerbert Xu return -EINVAL; 4931c26852SHerbert Xu 501da177e4SLinus Torvalds switch (type) { 511da177e4SLinus Torvalds case XFRMA_ALG_AUTH: 521da177e4SLinus Torvalds if (!algp->alg_key_len && 531da177e4SLinus Torvalds strcmp(algp->alg_name, "digest_null") != 0) 541da177e4SLinus Torvalds return -EINVAL; 551da177e4SLinus Torvalds break; 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds case XFRMA_ALG_CRYPT: 581da177e4SLinus Torvalds if (!algp->alg_key_len && 591da177e4SLinus Torvalds strcmp(algp->alg_name, "cipher_null") != 0) 601da177e4SLinus Torvalds return -EINVAL; 611da177e4SLinus Torvalds break; 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds case XFRMA_ALG_COMP: 641da177e4SLinus Torvalds /* Zero length keys are legal. */ 651da177e4SLinus Torvalds break; 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds default: 681da177e4SLinus Torvalds return -EINVAL; 691da177e4SLinus Torvalds }; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; 721da177e4SLinus Torvalds return 0; 731da177e4SLinus Torvalds } 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds static int verify_encap_tmpl(struct rtattr **xfrma) 761da177e4SLinus Torvalds { 771da177e4SLinus Torvalds struct rtattr *rt = xfrma[XFRMA_ENCAP - 1]; 781da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds if (!rt) 811da177e4SLinus Torvalds return 0; 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap)) 841da177e4SLinus Torvalds return -EINVAL; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds return 0; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 89df71837dSTrent Jaeger 90df71837dSTrent Jaeger static inline int verify_sec_ctx_len(struct rtattr **xfrma) 91df71837dSTrent Jaeger { 92df71837dSTrent Jaeger struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1]; 93df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 94df71837dSTrent Jaeger int len = 0; 95df71837dSTrent Jaeger 96df71837dSTrent Jaeger if (!rt) 97df71837dSTrent Jaeger return 0; 98df71837dSTrent Jaeger 99df71837dSTrent Jaeger if (rt->rta_len < sizeof(*uctx)) 100df71837dSTrent Jaeger return -EINVAL; 101df71837dSTrent Jaeger 102df71837dSTrent Jaeger uctx = RTA_DATA(rt); 103df71837dSTrent Jaeger 104df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 105df71837dSTrent Jaeger len += uctx->ctx_len; 106df71837dSTrent Jaeger 107df71837dSTrent Jaeger if (uctx->len != len) 108df71837dSTrent Jaeger return -EINVAL; 109df71837dSTrent Jaeger 110df71837dSTrent Jaeger return 0; 111df71837dSTrent Jaeger } 112df71837dSTrent Jaeger 113df71837dSTrent Jaeger 1141da177e4SLinus Torvalds static int verify_newsa_info(struct xfrm_usersa_info *p, 1151da177e4SLinus Torvalds struct rtattr **xfrma) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds int err; 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds err = -EINVAL; 1201da177e4SLinus Torvalds switch (p->family) { 1211da177e4SLinus Torvalds case AF_INET: 1221da177e4SLinus Torvalds break; 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds case AF_INET6: 1251da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1261da177e4SLinus Torvalds break; 1271da177e4SLinus Torvalds #else 1281da177e4SLinus Torvalds err = -EAFNOSUPPORT; 1291da177e4SLinus Torvalds goto out; 1301da177e4SLinus Torvalds #endif 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds default: 1331da177e4SLinus Torvalds goto out; 1341da177e4SLinus Torvalds }; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds err = -EINVAL; 1371da177e4SLinus Torvalds switch (p->id.proto) { 1381da177e4SLinus Torvalds case IPPROTO_AH: 1391da177e4SLinus Torvalds if (!xfrma[XFRMA_ALG_AUTH-1] || 1401da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1] || 1411da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]) 1421da177e4SLinus Torvalds goto out; 1431da177e4SLinus Torvalds break; 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds case IPPROTO_ESP: 1461da177e4SLinus Torvalds if ((!xfrma[XFRMA_ALG_AUTH-1] && 1471da177e4SLinus Torvalds !xfrma[XFRMA_ALG_CRYPT-1]) || 1481da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]) 1491da177e4SLinus Torvalds goto out; 1501da177e4SLinus Torvalds break; 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds case IPPROTO_COMP: 1531da177e4SLinus Torvalds if (!xfrma[XFRMA_ALG_COMP-1] || 1541da177e4SLinus Torvalds xfrma[XFRMA_ALG_AUTH-1] || 1551da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1]) 1561da177e4SLinus Torvalds goto out; 1571da177e4SLinus Torvalds break; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds default: 1601da177e4SLinus Torvalds goto out; 1611da177e4SLinus Torvalds }; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH))) 1641da177e4SLinus Torvalds goto out; 1651da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT))) 1661da177e4SLinus Torvalds goto out; 1671da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP))) 1681da177e4SLinus Torvalds goto out; 1691da177e4SLinus Torvalds if ((err = verify_encap_tmpl(xfrma))) 1701da177e4SLinus Torvalds goto out; 171df71837dSTrent Jaeger if ((err = verify_sec_ctx_len(xfrma))) 172df71837dSTrent Jaeger goto out; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds err = -EINVAL; 1751da177e4SLinus Torvalds switch (p->mode) { 1761da177e4SLinus Torvalds case 0: 1771da177e4SLinus Torvalds case 1: 1781da177e4SLinus Torvalds break; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds default: 1811da177e4SLinus Torvalds goto out; 1821da177e4SLinus Torvalds }; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds err = 0; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds out: 1871da177e4SLinus Torvalds return err; 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, 1911da177e4SLinus Torvalds struct xfrm_algo_desc *(*get_byname)(char *, int), 1921da177e4SLinus Torvalds struct rtattr *u_arg) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds struct rtattr *rta = u_arg; 1951da177e4SLinus Torvalds struct xfrm_algo *p, *ualg; 1961da177e4SLinus Torvalds struct xfrm_algo_desc *algo; 197b9e9deadSHerbert Xu int len; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds if (!rta) 2001da177e4SLinus Torvalds return 0; 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds ualg = RTA_DATA(rta); 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds algo = get_byname(ualg->alg_name, 1); 2051da177e4SLinus Torvalds if (!algo) 2061da177e4SLinus Torvalds return -ENOSYS; 2071da177e4SLinus Torvalds *props = algo->desc.sadb_alg_id; 2081da177e4SLinus Torvalds 209b9e9deadSHerbert Xu len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8; 210b9e9deadSHerbert Xu p = kmalloc(len, GFP_KERNEL); 2111da177e4SLinus Torvalds if (!p) 2121da177e4SLinus Torvalds return -ENOMEM; 2131da177e4SLinus Torvalds 214b9e9deadSHerbert Xu memcpy(p, ualg, len); 2151da177e4SLinus Torvalds *algpp = p; 2161da177e4SLinus Torvalds return 0; 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg) 2201da177e4SLinus Torvalds { 2211da177e4SLinus Torvalds struct rtattr *rta = u_arg; 2221da177e4SLinus Torvalds struct xfrm_encap_tmpl *p, *uencap; 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds if (!rta) 2251da177e4SLinus Torvalds return 0; 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds uencap = RTA_DATA(rta); 2281da177e4SLinus Torvalds p = kmalloc(sizeof(*p), GFP_KERNEL); 2291da177e4SLinus Torvalds if (!p) 2301da177e4SLinus Torvalds return -ENOMEM; 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds memcpy(p, uencap, sizeof(*p)); 2331da177e4SLinus Torvalds *encapp = p; 2341da177e4SLinus Torvalds return 0; 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds 237df71837dSTrent Jaeger 238df71837dSTrent Jaeger static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp) 239df71837dSTrent Jaeger { 240df71837dSTrent Jaeger struct xfrm_sec_ctx *xfrm_ctx = xp->security; 241df71837dSTrent Jaeger int len = 0; 242df71837dSTrent Jaeger 243df71837dSTrent Jaeger if (xfrm_ctx) { 244df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 245df71837dSTrent Jaeger len += xfrm_ctx->ctx_len; 246df71837dSTrent Jaeger } 247df71837dSTrent Jaeger return len; 248df71837dSTrent Jaeger } 249df71837dSTrent Jaeger 250df71837dSTrent Jaeger static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg) 251df71837dSTrent Jaeger { 252df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 253df71837dSTrent Jaeger 254df71837dSTrent Jaeger if (!u_arg) 255df71837dSTrent Jaeger return 0; 256df71837dSTrent Jaeger 257df71837dSTrent Jaeger uctx = RTA_DATA(u_arg); 258df71837dSTrent Jaeger return security_xfrm_state_alloc(x, uctx); 259df71837dSTrent Jaeger } 260df71837dSTrent Jaeger 2611da177e4SLinus Torvalds static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 2621da177e4SLinus Torvalds { 2631da177e4SLinus Torvalds memcpy(&x->id, &p->id, sizeof(x->id)); 2641da177e4SLinus Torvalds memcpy(&x->sel, &p->sel, sizeof(x->sel)); 2651da177e4SLinus Torvalds memcpy(&x->lft, &p->lft, sizeof(x->lft)); 2661da177e4SLinus Torvalds x->props.mode = p->mode; 2671da177e4SLinus Torvalds x->props.replay_window = p->replay_window; 2681da177e4SLinus Torvalds x->props.reqid = p->reqid; 2691da177e4SLinus Torvalds x->props.family = p->family; 2701da177e4SLinus Torvalds x->props.saddr = p->saddr; 2711da177e4SLinus Torvalds x->props.flags = p->flags; 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds 274d51d081dSJamal Hadi Salim /* 275d51d081dSJamal Hadi Salim * someday when pfkey also has support, we could have the code 276d51d081dSJamal Hadi Salim * somehow made shareable and move it to xfrm_state.c - JHS 277d51d081dSJamal Hadi Salim * 278d51d081dSJamal Hadi Salim */ 279d51d081dSJamal Hadi Salim static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma) 280d51d081dSJamal Hadi Salim { 281d51d081dSJamal Hadi Salim int err = - EINVAL; 282d51d081dSJamal Hadi Salim struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; 283d51d081dSJamal Hadi Salim struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; 284d51d081dSJamal Hadi Salim struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1]; 285d51d081dSJamal Hadi Salim struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1]; 286d51d081dSJamal Hadi Salim 287d51d081dSJamal Hadi Salim if (rp) { 288d51d081dSJamal Hadi Salim struct xfrm_replay_state *replay; 289d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(rp) < sizeof(*replay)) 290d51d081dSJamal Hadi Salim goto error; 291d51d081dSJamal Hadi Salim replay = RTA_DATA(rp); 292d51d081dSJamal Hadi Salim memcpy(&x->replay, replay, sizeof(*replay)); 293d51d081dSJamal Hadi Salim memcpy(&x->preplay, replay, sizeof(*replay)); 294d51d081dSJamal Hadi Salim } 295d51d081dSJamal Hadi Salim 296d51d081dSJamal Hadi Salim if (lt) { 297d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur *ltime; 298d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(lt) < sizeof(*ltime)) 299d51d081dSJamal Hadi Salim goto error; 300d51d081dSJamal Hadi Salim ltime = RTA_DATA(lt); 301d51d081dSJamal Hadi Salim x->curlft.bytes = ltime->bytes; 302d51d081dSJamal Hadi Salim x->curlft.packets = ltime->packets; 303d51d081dSJamal Hadi Salim x->curlft.add_time = ltime->add_time; 304d51d081dSJamal Hadi Salim x->curlft.use_time = ltime->use_time; 305d51d081dSJamal Hadi Salim } 306d51d081dSJamal Hadi Salim 307d51d081dSJamal Hadi Salim if (et) { 308d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(et) < sizeof(u32)) 309d51d081dSJamal Hadi Salim goto error; 310d51d081dSJamal Hadi Salim x->replay_maxage = *(u32*)RTA_DATA(et); 311d51d081dSJamal Hadi Salim } 312d51d081dSJamal Hadi Salim 313d51d081dSJamal Hadi Salim if (rt) { 314d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(rt) < sizeof(u32)) 315d51d081dSJamal Hadi Salim goto error; 316d51d081dSJamal Hadi Salim x->replay_maxdiff = *(u32*)RTA_DATA(rt); 317d51d081dSJamal Hadi Salim } 318d51d081dSJamal Hadi Salim 319d51d081dSJamal Hadi Salim return 0; 320d51d081dSJamal Hadi Salim error: 321d51d081dSJamal Hadi Salim return err; 322d51d081dSJamal Hadi Salim } 323d51d081dSJamal Hadi Salim 3241da177e4SLinus Torvalds static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, 3251da177e4SLinus Torvalds struct rtattr **xfrma, 3261da177e4SLinus Torvalds int *errp) 3271da177e4SLinus Torvalds { 3281da177e4SLinus Torvalds struct xfrm_state *x = xfrm_state_alloc(); 3291da177e4SLinus Torvalds int err = -ENOMEM; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds if (!x) 3321da177e4SLinus Torvalds goto error_no_put; 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds copy_from_user_state(x, p); 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, 3371da177e4SLinus Torvalds xfrm_aalg_get_byname, 3381da177e4SLinus Torvalds xfrma[XFRMA_ALG_AUTH-1]))) 3391da177e4SLinus Torvalds goto error; 3401da177e4SLinus Torvalds if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, 3411da177e4SLinus Torvalds xfrm_ealg_get_byname, 3421da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1]))) 3431da177e4SLinus Torvalds goto error; 3441da177e4SLinus Torvalds if ((err = attach_one_algo(&x->calg, &x->props.calgo, 3451da177e4SLinus Torvalds xfrm_calg_get_byname, 3461da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]))) 3471da177e4SLinus Torvalds goto error; 3481da177e4SLinus Torvalds if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) 3491da177e4SLinus Torvalds goto error; 3501da177e4SLinus Torvalds 35172cb6962SHerbert Xu err = xfrm_init_state(x); 3521da177e4SLinus Torvalds if (err) 3531da177e4SLinus Torvalds goto error; 3541da177e4SLinus Torvalds 355df71837dSTrent Jaeger if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) 356df71837dSTrent Jaeger goto error; 357df71837dSTrent Jaeger 3581da177e4SLinus Torvalds x->km.seq = p->seq; 359d51d081dSJamal Hadi Salim x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; 360d51d081dSJamal Hadi Salim /* sysctl_xfrm_aevent_etime is in 100ms units */ 361d51d081dSJamal Hadi Salim x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; 362d51d081dSJamal Hadi Salim x->preplay.bitmap = 0; 363d51d081dSJamal Hadi Salim x->preplay.seq = x->replay.seq+x->replay_maxdiff; 364d51d081dSJamal Hadi Salim x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; 365d51d081dSJamal Hadi Salim 366d51d081dSJamal Hadi Salim /* override default values from above */ 367d51d081dSJamal Hadi Salim 368d51d081dSJamal Hadi Salim err = xfrm_update_ae_params(x, (struct rtattr **)xfrma); 369d51d081dSJamal Hadi Salim if (err < 0) 370d51d081dSJamal Hadi Salim goto error; 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds return x; 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds error: 3751da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 3761da177e4SLinus Torvalds xfrm_state_put(x); 3771da177e4SLinus Torvalds error_no_put: 3781da177e4SLinus Torvalds *errp = err; 3791da177e4SLinus Torvalds return NULL; 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 3831da177e4SLinus Torvalds { 3841da177e4SLinus Torvalds struct xfrm_usersa_info *p = NLMSG_DATA(nlh); 3851da177e4SLinus Torvalds struct xfrm_state *x; 3861da177e4SLinus Torvalds int err; 38726b15dadSJamal Hadi Salim struct km_event c; 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds err = verify_newsa_info(p, (struct rtattr **)xfrma); 3901da177e4SLinus Torvalds if (err) 3911da177e4SLinus Torvalds return err; 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds x = xfrm_state_construct(p, (struct rtattr **)xfrma, &err); 3941da177e4SLinus Torvalds if (!x) 3951da177e4SLinus Torvalds return err; 3961da177e4SLinus Torvalds 39726b15dadSJamal Hadi Salim xfrm_state_hold(x); 3981da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 3991da177e4SLinus Torvalds err = xfrm_state_add(x); 4001da177e4SLinus Torvalds else 4011da177e4SLinus Torvalds err = xfrm_state_update(x); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds if (err < 0) { 4041da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 40521380b81SHerbert Xu __xfrm_state_put(x); 4067d6dfe1fSPatrick McHardy goto out; 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds 40926b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 41026b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 411f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 41226b15dadSJamal Hadi Salim 41326b15dadSJamal Hadi Salim km_state_notify(x, &c); 4147d6dfe1fSPatrick McHardy out: 41526b15dadSJamal Hadi Salim xfrm_state_put(x); 4161da177e4SLinus Torvalds return err; 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 4201da177e4SLinus Torvalds { 4211da177e4SLinus Torvalds struct xfrm_state *x; 42226b15dadSJamal Hadi Salim int err; 42326b15dadSJamal Hadi Salim struct km_event c; 4241da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 4271da177e4SLinus Torvalds if (x == NULL) 4281da177e4SLinus Torvalds return -ESRCH; 4291da177e4SLinus Torvalds 4306f68dc37SDavid S. Miller if ((err = security_xfrm_state_delete(x)) != 0) 431c8c05a8eSCatherine Zhang goto out; 432c8c05a8eSCatherine Zhang 4331da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 434c8c05a8eSCatherine Zhang err = -EPERM; 435c8c05a8eSCatherine Zhang goto out; 4361da177e4SLinus Torvalds } 4371da177e4SLinus Torvalds 43826b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 439c8c05a8eSCatherine Zhang if (err < 0) 440c8c05a8eSCatherine Zhang goto out; 44126b15dadSJamal Hadi Salim 44226b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 44326b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 444f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 44526b15dadSJamal Hadi Salim km_state_notify(x, &c); 4461da177e4SLinus Torvalds 447c8c05a8eSCatherine Zhang out: 448c8c05a8eSCatherine Zhang xfrm_state_put(x); 44926b15dadSJamal Hadi Salim return err; 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 4531da177e4SLinus Torvalds { 4541da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 4551da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 4561da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 4571da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 4581da177e4SLinus Torvalds memcpy(&p->stats, &x->stats, sizeof(p->stats)); 4591da177e4SLinus Torvalds p->saddr = x->props.saddr; 4601da177e4SLinus Torvalds p->mode = x->props.mode; 4611da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 4621da177e4SLinus Torvalds p->reqid = x->props.reqid; 4631da177e4SLinus Torvalds p->family = x->props.family; 4641da177e4SLinus Torvalds p->flags = x->props.flags; 4651da177e4SLinus Torvalds p->seq = x->km.seq; 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds struct xfrm_dump_info { 4691da177e4SLinus Torvalds struct sk_buff *in_skb; 4701da177e4SLinus Torvalds struct sk_buff *out_skb; 4711da177e4SLinus Torvalds u32 nlmsg_seq; 4721da177e4SLinus Torvalds u16 nlmsg_flags; 4731da177e4SLinus Torvalds int start_idx; 4741da177e4SLinus Torvalds int this_idx; 4751da177e4SLinus Torvalds }; 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 4781da177e4SLinus Torvalds { 4791da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 4801da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 4811da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 4821da177e4SLinus Torvalds struct xfrm_usersa_info *p; 4831da177e4SLinus Torvalds struct nlmsghdr *nlh; 4841da177e4SLinus Torvalds unsigned char *b = skb->tail; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 4871da177e4SLinus Torvalds goto out; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 4901da177e4SLinus Torvalds sp->nlmsg_seq, 4911da177e4SLinus Torvalds XFRM_MSG_NEWSA, sizeof(*p)); 4921da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 4951da177e4SLinus Torvalds copy_to_user_state(x, p); 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds if (x->aalg) 4981da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_AUTH, 4991da177e4SLinus Torvalds sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 5001da177e4SLinus Torvalds if (x->ealg) 5011da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_CRYPT, 5021da177e4SLinus Torvalds sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 5031da177e4SLinus Torvalds if (x->calg) 5041da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds if (x->encap) 5071da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 5081da177e4SLinus Torvalds 509df71837dSTrent Jaeger if (x->security) { 510df71837dSTrent Jaeger int ctx_size = sizeof(struct xfrm_sec_ctx) + 511df71837dSTrent Jaeger x->security->ctx_len; 512df71837dSTrent Jaeger struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); 513df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); 514df71837dSTrent Jaeger 515df71837dSTrent Jaeger uctx->exttype = XFRMA_SEC_CTX; 516df71837dSTrent Jaeger uctx->len = ctx_size; 517df71837dSTrent Jaeger uctx->ctx_doi = x->security->ctx_doi; 518df71837dSTrent Jaeger uctx->ctx_alg = x->security->ctx_alg; 519df71837dSTrent Jaeger uctx->ctx_len = x->security->ctx_len; 520df71837dSTrent Jaeger memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); 521df71837dSTrent Jaeger } 5221da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 5231da177e4SLinus Torvalds out: 5241da177e4SLinus Torvalds sp->this_idx++; 5251da177e4SLinus Torvalds return 0; 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds nlmsg_failure: 5281da177e4SLinus Torvalds rtattr_failure: 5291da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 5301da177e4SLinus Torvalds return -1; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 5341da177e4SLinus Torvalds { 5351da177e4SLinus Torvalds struct xfrm_dump_info info; 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds info.in_skb = cb->skb; 5381da177e4SLinus Torvalds info.out_skb = skb; 5391da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 5401da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 5411da177e4SLinus Torvalds info.this_idx = 0; 5421da177e4SLinus Torvalds info.start_idx = cb->args[0]; 5431da177e4SLinus Torvalds (void) xfrm_state_walk(IPSEC_PROTO_ANY, dump_one_state, &info); 5441da177e4SLinus Torvalds cb->args[0] = info.this_idx; 5451da177e4SLinus Torvalds 5461da177e4SLinus Torvalds return skb->len; 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 5501da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 5511da177e4SLinus Torvalds { 5521da177e4SLinus Torvalds struct xfrm_dump_info info; 5531da177e4SLinus Torvalds struct sk_buff *skb; 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 5561da177e4SLinus Torvalds if (!skb) 5571da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 5601da177e4SLinus Torvalds info.in_skb = in_skb; 5611da177e4SLinus Torvalds info.out_skb = skb; 5621da177e4SLinus Torvalds info.nlmsg_seq = seq; 5631da177e4SLinus Torvalds info.nlmsg_flags = 0; 5641da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds if (dump_one_state(x, 0, &info)) { 5671da177e4SLinus Torvalds kfree_skb(skb); 5681da177e4SLinus Torvalds return NULL; 5691da177e4SLinus Torvalds } 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds return skb; 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 5751da177e4SLinus Torvalds { 5761da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 5771da177e4SLinus Torvalds struct xfrm_state *x; 5781da177e4SLinus Torvalds struct sk_buff *resp_skb; 5791da177e4SLinus Torvalds int err; 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 5821da177e4SLinus Torvalds err = -ESRCH; 5831da177e4SLinus Torvalds if (x == NULL) 5841da177e4SLinus Torvalds goto out_noput; 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 5871da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 5881da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 5891da177e4SLinus Torvalds } else { 5901da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 5911da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds xfrm_state_put(x); 5941da177e4SLinus Torvalds out_noput: 5951da177e4SLinus Torvalds return err; 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds static int verify_userspi_info(struct xfrm_userspi_info *p) 5991da177e4SLinus Torvalds { 6001da177e4SLinus Torvalds switch (p->info.id.proto) { 6011da177e4SLinus Torvalds case IPPROTO_AH: 6021da177e4SLinus Torvalds case IPPROTO_ESP: 6031da177e4SLinus Torvalds break; 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds case IPPROTO_COMP: 6061da177e4SLinus Torvalds /* IPCOMP spi is 16-bits. */ 6071da177e4SLinus Torvalds if (p->max >= 0x10000) 6081da177e4SLinus Torvalds return -EINVAL; 6091da177e4SLinus Torvalds break; 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds default: 6121da177e4SLinus Torvalds return -EINVAL; 6131da177e4SLinus Torvalds }; 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds if (p->min > p->max) 6161da177e4SLinus Torvalds return -EINVAL; 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds return 0; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 6221da177e4SLinus Torvalds { 6231da177e4SLinus Torvalds struct xfrm_state *x; 6241da177e4SLinus Torvalds struct xfrm_userspi_info *p; 6251da177e4SLinus Torvalds struct sk_buff *resp_skb; 6261da177e4SLinus Torvalds xfrm_address_t *daddr; 6271da177e4SLinus Torvalds int family; 6281da177e4SLinus Torvalds int err; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 6311da177e4SLinus Torvalds err = verify_userspi_info(p); 6321da177e4SLinus Torvalds if (err) 6331da177e4SLinus Torvalds goto out_noput; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds family = p->info.family; 6361da177e4SLinus Torvalds daddr = &p->info.id.daddr; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds x = NULL; 6391da177e4SLinus Torvalds if (p->info.seq) { 6401da177e4SLinus Torvalds x = xfrm_find_acq_byseq(p->info.seq); 6411da177e4SLinus Torvalds if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { 6421da177e4SLinus Torvalds xfrm_state_put(x); 6431da177e4SLinus Torvalds x = NULL; 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds if (!x) 6481da177e4SLinus Torvalds x = xfrm_find_acq(p->info.mode, p->info.reqid, 6491da177e4SLinus Torvalds p->info.id.proto, daddr, 6501da177e4SLinus Torvalds &p->info.saddr, 1, 6511da177e4SLinus Torvalds family); 6521da177e4SLinus Torvalds err = -ENOENT; 6531da177e4SLinus Torvalds if (x == NULL) 6541da177e4SLinus Torvalds goto out_noput; 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds resp_skb = ERR_PTR(-ENOENT); 6571da177e4SLinus Torvalds 6581da177e4SLinus Torvalds spin_lock_bh(&x->lock); 6591da177e4SLinus Torvalds if (x->km.state != XFRM_STATE_DEAD) { 6601da177e4SLinus Torvalds xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); 6611da177e4SLinus Torvalds if (x->id.spi) 6621da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 6671da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 6681da177e4SLinus Torvalds goto out; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 6721da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds out: 6751da177e4SLinus Torvalds xfrm_state_put(x); 6761da177e4SLinus Torvalds out_noput: 6771da177e4SLinus Torvalds return err; 6781da177e4SLinus Torvalds } 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds static int verify_policy_dir(__u8 dir) 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds switch (dir) { 6831da177e4SLinus Torvalds case XFRM_POLICY_IN: 6841da177e4SLinus Torvalds case XFRM_POLICY_OUT: 6851da177e4SLinus Torvalds case XFRM_POLICY_FWD: 6861da177e4SLinus Torvalds break; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds default: 6891da177e4SLinus Torvalds return -EINVAL; 6901da177e4SLinus Torvalds }; 6911da177e4SLinus Torvalds 6921da177e4SLinus Torvalds return 0; 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds switch (p->share) { 6981da177e4SLinus Torvalds case XFRM_SHARE_ANY: 6991da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 7001da177e4SLinus Torvalds case XFRM_SHARE_USER: 7011da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds default: 7051da177e4SLinus Torvalds return -EINVAL; 7061da177e4SLinus Torvalds }; 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds switch (p->action) { 7091da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 7101da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 7111da177e4SLinus Torvalds break; 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvalds default: 7141da177e4SLinus Torvalds return -EINVAL; 7151da177e4SLinus Torvalds }; 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds switch (p->sel.family) { 7181da177e4SLinus Torvalds case AF_INET: 7191da177e4SLinus Torvalds break; 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds case AF_INET6: 7221da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 7231da177e4SLinus Torvalds break; 7241da177e4SLinus Torvalds #else 7251da177e4SLinus Torvalds return -EAFNOSUPPORT; 7261da177e4SLinus Torvalds #endif 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds default: 7291da177e4SLinus Torvalds return -EINVAL; 7301da177e4SLinus Torvalds }; 7311da177e4SLinus Torvalds 7321da177e4SLinus Torvalds return verify_policy_dir(p->dir); 7331da177e4SLinus Torvalds } 7341da177e4SLinus Torvalds 735df71837dSTrent Jaeger static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) 736df71837dSTrent Jaeger { 737df71837dSTrent Jaeger struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; 738df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 739df71837dSTrent Jaeger 740df71837dSTrent Jaeger if (!rt) 741df71837dSTrent Jaeger return 0; 742df71837dSTrent Jaeger 743df71837dSTrent Jaeger uctx = RTA_DATA(rt); 744df71837dSTrent Jaeger return security_xfrm_policy_alloc(pol, uctx); 745df71837dSTrent Jaeger } 746df71837dSTrent Jaeger 7471da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 7481da177e4SLinus Torvalds int nr) 7491da177e4SLinus Torvalds { 7501da177e4SLinus Torvalds int i; 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds xp->xfrm_nr = nr; 7531da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 7541da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 7571da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 7581da177e4SLinus Torvalds sizeof(xfrm_address_t)); 7591da177e4SLinus Torvalds t->reqid = ut->reqid; 7601da177e4SLinus Torvalds t->mode = ut->mode; 7611da177e4SLinus Torvalds t->share = ut->share; 7621da177e4SLinus Torvalds t->optional = ut->optional; 7631da177e4SLinus Torvalds t->aalgos = ut->aalgos; 7641da177e4SLinus Torvalds t->ealgos = ut->ealgos; 7651da177e4SLinus Torvalds t->calgos = ut->calgos; 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) 7701da177e4SLinus Torvalds { 7711da177e4SLinus Torvalds struct rtattr *rt = xfrma[XFRMA_TMPL-1]; 7721da177e4SLinus Torvalds struct xfrm_user_tmpl *utmpl; 7731da177e4SLinus Torvalds int nr; 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds if (!rt) { 7761da177e4SLinus Torvalds pol->xfrm_nr = 0; 7771da177e4SLinus Torvalds } else { 7781da177e4SLinus Torvalds nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); 7791da177e4SLinus Torvalds 7801da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 7811da177e4SLinus Torvalds return -EINVAL; 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds copy_templates(pol, RTA_DATA(rt), nr); 7841da177e4SLinus Torvalds } 7851da177e4SLinus Torvalds return 0; 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 7891da177e4SLinus Torvalds { 7901da177e4SLinus Torvalds xp->priority = p->priority; 7911da177e4SLinus Torvalds xp->index = p->index; 7921da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 7931da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 7941da177e4SLinus Torvalds xp->action = p->action; 7951da177e4SLinus Torvalds xp->flags = p->flags; 7961da177e4SLinus Torvalds xp->family = p->sel.family; 7971da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 8011da177e4SLinus Torvalds { 8021da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 8031da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 8041da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 8051da177e4SLinus Torvalds p->priority = xp->priority; 8061da177e4SLinus Torvalds p->index = xp->index; 8071da177e4SLinus Torvalds p->sel.family = xp->family; 8081da177e4SLinus Torvalds p->dir = dir; 8091da177e4SLinus Torvalds p->action = xp->action; 8101da177e4SLinus Torvalds p->flags = xp->flags; 8111da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 8121da177e4SLinus Torvalds } 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) 8151da177e4SLinus Torvalds { 8161da177e4SLinus Torvalds struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); 8171da177e4SLinus Torvalds int err; 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds if (!xp) { 8201da177e4SLinus Torvalds *errp = -ENOMEM; 8211da177e4SLinus Torvalds return NULL; 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds copy_from_user_policy(xp, p); 825df71837dSTrent Jaeger 826df71837dSTrent Jaeger if (!(err = copy_from_user_tmpl(xp, xfrma))) 827df71837dSTrent Jaeger err = copy_from_user_sec_ctx(xp, xfrma); 828df71837dSTrent Jaeger 8291da177e4SLinus Torvalds if (err) { 8301da177e4SLinus Torvalds *errp = err; 8311da177e4SLinus Torvalds kfree(xp); 8321da177e4SLinus Torvalds xp = NULL; 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds return xp; 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 8391da177e4SLinus Torvalds { 8401da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); 8411da177e4SLinus Torvalds struct xfrm_policy *xp; 84226b15dadSJamal Hadi Salim struct km_event c; 8431da177e4SLinus Torvalds int err; 8441da177e4SLinus Torvalds int excl; 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds err = verify_newpolicy_info(p); 8471da177e4SLinus Torvalds if (err) 8481da177e4SLinus Torvalds return err; 849df71837dSTrent Jaeger err = verify_sec_ctx_len((struct rtattr **)xfrma); 850df71837dSTrent Jaeger if (err) 851df71837dSTrent Jaeger return err; 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds xp = xfrm_policy_construct(p, (struct rtattr **)xfrma, &err); 8541da177e4SLinus Torvalds if (!xp) 8551da177e4SLinus Torvalds return err; 8561da177e4SLinus Torvalds 85726b15dadSJamal Hadi Salim /* shouldnt excl be based on nlh flags?? 85826b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 85926b15dadSJamal Hadi Salim * in netlink excl is a flag and you wouldnt need 86026b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 8611da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 8621da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 8631da177e4SLinus Torvalds if (err) { 8645f8ac64bSTrent Jaeger security_xfrm_policy_free(xp); 8651da177e4SLinus Torvalds kfree(xp); 8661da177e4SLinus Torvalds return err; 8671da177e4SLinus Torvalds } 8681da177e4SLinus Torvalds 869f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 87026b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 87126b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 87226b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 87326b15dadSJamal Hadi Salim 8741da177e4SLinus Torvalds xfrm_pol_put(xp); 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds return 0; 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 8801da177e4SLinus Torvalds { 8811da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 8821da177e4SLinus Torvalds int i; 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 8851da177e4SLinus Torvalds return 0; 8861da177e4SLinus Torvalds 8871da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 8881da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 8891da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 8901da177e4SLinus Torvalds 8911da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 8921da177e4SLinus Torvalds up->family = xp->family; 8931da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 8941da177e4SLinus Torvalds up->reqid = kp->reqid; 8951da177e4SLinus Torvalds up->mode = kp->mode; 8961da177e4SLinus Torvalds up->share = kp->share; 8971da177e4SLinus Torvalds up->optional = kp->optional; 8981da177e4SLinus Torvalds up->aalgos = kp->aalgos; 8991da177e4SLinus Torvalds up->ealgos = kp->ealgos; 9001da177e4SLinus Torvalds up->calgos = kp->calgos; 9011da177e4SLinus Torvalds } 9021da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_TMPL, 9031da177e4SLinus Torvalds (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), 9041da177e4SLinus Torvalds vec); 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds return 0; 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds rtattr_failure: 9091da177e4SLinus Torvalds return -1; 9101da177e4SLinus Torvalds } 9111da177e4SLinus Torvalds 912df71837dSTrent Jaeger static int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) 913df71837dSTrent Jaeger { 914df71837dSTrent Jaeger if (xp->security) { 915df71837dSTrent Jaeger int ctx_size = sizeof(struct xfrm_sec_ctx) + 916df71837dSTrent Jaeger xp->security->ctx_len; 917df71837dSTrent Jaeger struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); 918df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); 919df71837dSTrent Jaeger 920df71837dSTrent Jaeger uctx->exttype = XFRMA_SEC_CTX; 921df71837dSTrent Jaeger uctx->len = ctx_size; 922df71837dSTrent Jaeger uctx->ctx_doi = xp->security->ctx_doi; 923df71837dSTrent Jaeger uctx->ctx_alg = xp->security->ctx_alg; 924df71837dSTrent Jaeger uctx->ctx_len = xp->security->ctx_len; 925df71837dSTrent Jaeger memcpy(uctx + 1, xp->security->ctx_str, xp->security->ctx_len); 926df71837dSTrent Jaeger } 927df71837dSTrent Jaeger return 0; 928df71837dSTrent Jaeger 929df71837dSTrent Jaeger rtattr_failure: 930df71837dSTrent Jaeger return -1; 931df71837dSTrent Jaeger } 932df71837dSTrent Jaeger 9331da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 9341da177e4SLinus Torvalds { 9351da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 9361da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 9371da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 9381da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 9391da177e4SLinus Torvalds struct nlmsghdr *nlh; 9401da177e4SLinus Torvalds unsigned char *b = skb->tail; 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 9431da177e4SLinus Torvalds goto out; 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 9461da177e4SLinus Torvalds sp->nlmsg_seq, 9471da177e4SLinus Torvalds XFRM_MSG_NEWPOLICY, sizeof(*p)); 9481da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 9491da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 9521da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 9531da177e4SLinus Torvalds goto nlmsg_failure; 954df71837dSTrent Jaeger if (copy_to_user_sec_ctx(xp, skb)) 955df71837dSTrent Jaeger goto nlmsg_failure; 9561da177e4SLinus Torvalds 9571da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 9581da177e4SLinus Torvalds out: 9591da177e4SLinus Torvalds sp->this_idx++; 9601da177e4SLinus Torvalds return 0; 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds nlmsg_failure: 9631da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 9641da177e4SLinus Torvalds return -1; 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds struct xfrm_dump_info info; 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds info.in_skb = cb->skb; 9721da177e4SLinus Torvalds info.out_skb = skb; 9731da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 9741da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 9751da177e4SLinus Torvalds info.this_idx = 0; 9761da177e4SLinus Torvalds info.start_idx = cb->args[0]; 9771da177e4SLinus Torvalds (void) xfrm_policy_walk(dump_one_policy, &info); 9781da177e4SLinus Torvalds cb->args[0] = info.this_idx; 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds return skb->len; 9811da177e4SLinus Torvalds } 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 9841da177e4SLinus Torvalds struct xfrm_policy *xp, 9851da177e4SLinus Torvalds int dir, u32 seq) 9861da177e4SLinus Torvalds { 9871da177e4SLinus Torvalds struct xfrm_dump_info info; 9881da177e4SLinus Torvalds struct sk_buff *skb; 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 9911da177e4SLinus Torvalds if (!skb) 9921da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 9951da177e4SLinus Torvalds info.in_skb = in_skb; 9961da177e4SLinus Torvalds info.out_skb = skb; 9971da177e4SLinus Torvalds info.nlmsg_seq = seq; 9981da177e4SLinus Torvalds info.nlmsg_flags = 0; 9991da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds if (dump_one_policy(xp, dir, 0, &info) < 0) { 10021da177e4SLinus Torvalds kfree_skb(skb); 10031da177e4SLinus Torvalds return NULL; 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds return skb; 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 10101da177e4SLinus Torvalds { 10111da177e4SLinus Torvalds struct xfrm_policy *xp; 10121da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 10131da177e4SLinus Torvalds int err; 101426b15dadSJamal Hadi Salim struct km_event c; 10151da177e4SLinus Torvalds int delete; 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 10181da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds err = verify_policy_dir(p->dir); 10211da177e4SLinus Torvalds if (err) 10221da177e4SLinus Torvalds return err; 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds if (p->index) 10251da177e4SLinus Torvalds xp = xfrm_policy_byid(p->dir, p->index, delete); 1026df71837dSTrent Jaeger else { 1027df71837dSTrent Jaeger struct rtattr **rtattrs = (struct rtattr **)xfrma; 1028df71837dSTrent Jaeger struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; 1029df71837dSTrent Jaeger struct xfrm_policy tmp; 1030df71837dSTrent Jaeger 1031df71837dSTrent Jaeger err = verify_sec_ctx_len(rtattrs); 1032df71837dSTrent Jaeger if (err) 1033df71837dSTrent Jaeger return err; 1034df71837dSTrent Jaeger 1035df71837dSTrent Jaeger memset(&tmp, 0, sizeof(struct xfrm_policy)); 1036df71837dSTrent Jaeger if (rt) { 1037df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); 1038df71837dSTrent Jaeger 1039df71837dSTrent Jaeger if ((err = security_xfrm_policy_alloc(&tmp, uctx))) 1040df71837dSTrent Jaeger return err; 1041df71837dSTrent Jaeger } 1042df71837dSTrent Jaeger xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, delete); 1043df71837dSTrent Jaeger security_xfrm_policy_free(&tmp); 1044df71837dSTrent Jaeger } 10451da177e4SLinus Torvalds if (xp == NULL) 10461da177e4SLinus Torvalds return -ENOENT; 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds if (!delete) { 10491da177e4SLinus Torvalds struct sk_buff *resp_skb; 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 10521da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 10531da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 10541da177e4SLinus Torvalds } else { 10551da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 10561da177e4SLinus Torvalds NETLINK_CB(skb).pid, 10571da177e4SLinus Torvalds MSG_DONTWAIT); 10581da177e4SLinus Torvalds } 105926b15dadSJamal Hadi Salim } else { 10606f68dc37SDavid S. Miller if ((err = security_xfrm_policy_delete(xp)) != 0) 1061c8c05a8eSCatherine Zhang goto out; 1062e7443892SHerbert Xu c.data.byid = p->index; 1063f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 106426b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 106526b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 106626b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds xfrm_pol_put(xp); 10701da177e4SLinus Torvalds 1071c8c05a8eSCatherine Zhang out: 10721da177e4SLinus Torvalds return err; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 10761da177e4SLinus Torvalds { 107726b15dadSJamal Hadi Salim struct km_event c; 10781da177e4SLinus Torvalds struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds xfrm_state_flush(p->proto); 1081bf08867fSHerbert Xu c.data.proto = p->proto; 1082f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 108326b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 108426b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 108526b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 108626b15dadSJamal Hadi Salim 10871da177e4SLinus Torvalds return 0; 10881da177e4SLinus Torvalds } 10891da177e4SLinus Torvalds 1090d51d081dSJamal Hadi Salim 1091d51d081dSJamal Hadi Salim static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) 1092d51d081dSJamal Hadi Salim { 1093d51d081dSJamal Hadi Salim struct xfrm_aevent_id *id; 1094d51d081dSJamal Hadi Salim struct nlmsghdr *nlh; 1095d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur ltime; 1096d51d081dSJamal Hadi Salim unsigned char *b = skb->tail; 1097d51d081dSJamal Hadi Salim 1098d51d081dSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id)); 1099d51d081dSJamal Hadi Salim id = NLMSG_DATA(nlh); 1100d51d081dSJamal Hadi Salim nlh->nlmsg_flags = 0; 1101d51d081dSJamal Hadi Salim 1102d51d081dSJamal Hadi Salim id->sa_id.daddr = x->id.daddr; 1103d51d081dSJamal Hadi Salim id->sa_id.spi = x->id.spi; 1104d51d081dSJamal Hadi Salim id->sa_id.family = x->props.family; 1105d51d081dSJamal Hadi Salim id->sa_id.proto = x->id.proto; 1106d51d081dSJamal Hadi Salim id->flags = c->data.aevent; 1107d51d081dSJamal Hadi Salim 1108d51d081dSJamal Hadi Salim RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); 1109d51d081dSJamal Hadi Salim 1110d51d081dSJamal Hadi Salim ltime.bytes = x->curlft.bytes; 1111d51d081dSJamal Hadi Salim ltime.packets = x->curlft.packets; 1112d51d081dSJamal Hadi Salim ltime.add_time = x->curlft.add_time; 1113d51d081dSJamal Hadi Salim ltime.use_time = x->curlft.use_time; 1114d51d081dSJamal Hadi Salim 1115d51d081dSJamal Hadi Salim RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); 1116d51d081dSJamal Hadi Salim 1117d51d081dSJamal Hadi Salim if (id->flags&XFRM_AE_RTHR) { 1118d51d081dSJamal Hadi Salim RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); 1119d51d081dSJamal Hadi Salim } 1120d51d081dSJamal Hadi Salim 1121d51d081dSJamal Hadi Salim if (id->flags&XFRM_AE_ETHR) { 1122d51d081dSJamal Hadi Salim u32 etimer = x->replay_maxage*10/HZ; 1123d51d081dSJamal Hadi Salim RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); 1124d51d081dSJamal Hadi Salim } 1125d51d081dSJamal Hadi Salim 1126d51d081dSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 1127d51d081dSJamal Hadi Salim return skb->len; 1128d51d081dSJamal Hadi Salim 1129d51d081dSJamal Hadi Salim rtattr_failure: 1130d51d081dSJamal Hadi Salim nlmsg_failure: 1131d51d081dSJamal Hadi Salim skb_trim(skb, b - skb->data); 1132d51d081dSJamal Hadi Salim return -1; 1133d51d081dSJamal Hadi Salim } 1134d51d081dSJamal Hadi Salim 1135d51d081dSJamal Hadi Salim static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 1136d51d081dSJamal Hadi Salim { 1137d51d081dSJamal Hadi Salim struct xfrm_state *x; 1138d51d081dSJamal Hadi Salim struct sk_buff *r_skb; 1139d51d081dSJamal Hadi Salim int err; 1140d51d081dSJamal Hadi Salim struct km_event c; 1141d51d081dSJamal Hadi Salim struct xfrm_aevent_id *p = NLMSG_DATA(nlh); 1142d51d081dSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); 1143d51d081dSJamal Hadi Salim struct xfrm_usersa_id *id = &p->sa_id; 1144d51d081dSJamal Hadi Salim 1145d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_replay_state)); 1146d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); 1147d51d081dSJamal Hadi Salim 1148d51d081dSJamal Hadi Salim if (p->flags&XFRM_AE_RTHR) 1149d51d081dSJamal Hadi Salim len+=RTA_SPACE(sizeof(u32)); 1150d51d081dSJamal Hadi Salim 1151d51d081dSJamal Hadi Salim if (p->flags&XFRM_AE_ETHR) 1152d51d081dSJamal Hadi Salim len+=RTA_SPACE(sizeof(u32)); 1153d51d081dSJamal Hadi Salim 1154d51d081dSJamal Hadi Salim r_skb = alloc_skb(len, GFP_ATOMIC); 1155d51d081dSJamal Hadi Salim if (r_skb == NULL) 1156d51d081dSJamal Hadi Salim return -ENOMEM; 1157d51d081dSJamal Hadi Salim 1158d51d081dSJamal Hadi Salim x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); 1159d51d081dSJamal Hadi Salim if (x == NULL) { 1160d51d081dSJamal Hadi Salim kfree(r_skb); 1161d51d081dSJamal Hadi Salim return -ESRCH; 1162d51d081dSJamal Hadi Salim } 1163d51d081dSJamal Hadi Salim 1164d51d081dSJamal Hadi Salim /* 1165d51d081dSJamal Hadi Salim * XXX: is this lock really needed - none of the other 1166d51d081dSJamal Hadi Salim * gets lock (the concern is things getting updated 1167d51d081dSJamal Hadi Salim * while we are still reading) - jhs 1168d51d081dSJamal Hadi Salim */ 1169d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 1170d51d081dSJamal Hadi Salim c.data.aevent = p->flags; 1171d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 1172d51d081dSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 1173d51d081dSJamal Hadi Salim 1174d51d081dSJamal Hadi Salim if (build_aevent(r_skb, x, &c) < 0) 1175d51d081dSJamal Hadi Salim BUG(); 1176d51d081dSJamal Hadi Salim err = netlink_unicast(xfrm_nl, r_skb, 1177d51d081dSJamal Hadi Salim NETLINK_CB(skb).pid, MSG_DONTWAIT); 1178d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 1179d51d081dSJamal Hadi Salim xfrm_state_put(x); 1180d51d081dSJamal Hadi Salim return err; 1181d51d081dSJamal Hadi Salim } 1182d51d081dSJamal Hadi Salim 1183d51d081dSJamal Hadi Salim static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 1184d51d081dSJamal Hadi Salim { 1185d51d081dSJamal Hadi Salim struct xfrm_state *x; 1186d51d081dSJamal Hadi Salim struct km_event c; 1187d51d081dSJamal Hadi Salim int err = - EINVAL; 1188d51d081dSJamal Hadi Salim struct xfrm_aevent_id *p = NLMSG_DATA(nlh); 1189d51d081dSJamal Hadi Salim struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; 1190d51d081dSJamal Hadi Salim struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; 1191d51d081dSJamal Hadi Salim 1192d51d081dSJamal Hadi Salim if (!lt && !rp) 1193d51d081dSJamal Hadi Salim return err; 1194d51d081dSJamal Hadi Salim 1195d51d081dSJamal Hadi Salim /* pedantic mode - thou shalt sayeth replaceth */ 1196d51d081dSJamal Hadi Salim if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) 1197d51d081dSJamal Hadi Salim return err; 1198d51d081dSJamal Hadi Salim 1199d51d081dSJamal Hadi Salim x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); 1200d51d081dSJamal Hadi Salim if (x == NULL) 1201d51d081dSJamal Hadi Salim return -ESRCH; 1202d51d081dSJamal Hadi Salim 1203d51d081dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 1204d51d081dSJamal Hadi Salim goto out; 1205d51d081dSJamal Hadi Salim 1206d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 1207d51d081dSJamal Hadi Salim err = xfrm_update_ae_params(x,(struct rtattr **)xfrma); 1208d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 1209d51d081dSJamal Hadi Salim if (err < 0) 1210d51d081dSJamal Hadi Salim goto out; 1211d51d081dSJamal Hadi Salim 1212d51d081dSJamal Hadi Salim c.event = nlh->nlmsg_type; 1213d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 1214d51d081dSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 1215d51d081dSJamal Hadi Salim c.data.aevent = XFRM_AE_CU; 1216d51d081dSJamal Hadi Salim km_state_notify(x, &c); 1217d51d081dSJamal Hadi Salim err = 0; 1218d51d081dSJamal Hadi Salim out: 1219d51d081dSJamal Hadi Salim xfrm_state_put(x); 1220d51d081dSJamal Hadi Salim return err; 1221d51d081dSJamal Hadi Salim } 1222d51d081dSJamal Hadi Salim 12231da177e4SLinus Torvalds static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 12241da177e4SLinus Torvalds { 122526b15dadSJamal Hadi Salim struct km_event c; 122626b15dadSJamal Hadi Salim 12271da177e4SLinus Torvalds xfrm_policy_flush(); 1228f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 122926b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 123026b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 123126b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 12321da177e4SLinus Torvalds return 0; 12331da177e4SLinus Torvalds } 12341da177e4SLinus Torvalds 12356c5c8ca7SJamal Hadi Salim static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 12366c5c8ca7SJamal Hadi Salim { 12376c5c8ca7SJamal Hadi Salim struct xfrm_policy *xp; 12386c5c8ca7SJamal Hadi Salim struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); 12396c5c8ca7SJamal Hadi Salim struct xfrm_userpolicy_info *p = &up->pol; 12406c5c8ca7SJamal Hadi Salim int err = -ENOENT; 12416c5c8ca7SJamal Hadi Salim 12426c5c8ca7SJamal Hadi Salim if (p->index) 12436c5c8ca7SJamal Hadi Salim xp = xfrm_policy_byid(p->dir, p->index, 0); 12446c5c8ca7SJamal Hadi Salim else { 12456c5c8ca7SJamal Hadi Salim struct rtattr **rtattrs = (struct rtattr **)xfrma; 12466c5c8ca7SJamal Hadi Salim struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; 12476c5c8ca7SJamal Hadi Salim struct xfrm_policy tmp; 12486c5c8ca7SJamal Hadi Salim 12496c5c8ca7SJamal Hadi Salim err = verify_sec_ctx_len(rtattrs); 12506c5c8ca7SJamal Hadi Salim if (err) 12516c5c8ca7SJamal Hadi Salim return err; 12526c5c8ca7SJamal Hadi Salim 12536c5c8ca7SJamal Hadi Salim memset(&tmp, 0, sizeof(struct xfrm_policy)); 12546c5c8ca7SJamal Hadi Salim if (rt) { 12556c5c8ca7SJamal Hadi Salim struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); 12566c5c8ca7SJamal Hadi Salim 12576c5c8ca7SJamal Hadi Salim if ((err = security_xfrm_policy_alloc(&tmp, uctx))) 12586c5c8ca7SJamal Hadi Salim return err; 12596c5c8ca7SJamal Hadi Salim } 12606c5c8ca7SJamal Hadi Salim xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, 0); 12616c5c8ca7SJamal Hadi Salim security_xfrm_policy_free(&tmp); 12626c5c8ca7SJamal Hadi Salim } 12636c5c8ca7SJamal Hadi Salim 12646c5c8ca7SJamal Hadi Salim if (xp == NULL) 12656c5c8ca7SJamal Hadi Salim return err; 12666c5c8ca7SJamal Hadi Salim read_lock(&xp->lock); 12676c5c8ca7SJamal Hadi Salim if (xp->dead) { 12686c5c8ca7SJamal Hadi Salim read_unlock(&xp->lock); 12696c5c8ca7SJamal Hadi Salim goto out; 12706c5c8ca7SJamal Hadi Salim } 12716c5c8ca7SJamal Hadi Salim 12726c5c8ca7SJamal Hadi Salim read_unlock(&xp->lock); 12736c5c8ca7SJamal Hadi Salim err = 0; 12746c5c8ca7SJamal Hadi Salim if (up->hard) { 12756c5c8ca7SJamal Hadi Salim xfrm_policy_delete(xp, p->dir); 12766c5c8ca7SJamal Hadi Salim } else { 12776c5c8ca7SJamal Hadi Salim // reset the timers here? 12786c5c8ca7SJamal Hadi Salim printk("Dont know what to do with soft policy expire\n"); 12796c5c8ca7SJamal Hadi Salim } 12806c5c8ca7SJamal Hadi Salim km_policy_expired(xp, p->dir, up->hard, current->pid); 12816c5c8ca7SJamal Hadi Salim 12826c5c8ca7SJamal Hadi Salim out: 12836c5c8ca7SJamal Hadi Salim xfrm_pol_put(xp); 12846c5c8ca7SJamal Hadi Salim return err; 12856c5c8ca7SJamal Hadi Salim } 12866c5c8ca7SJamal Hadi Salim 128753bc6b4dSJamal Hadi Salim static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 128853bc6b4dSJamal Hadi Salim { 128953bc6b4dSJamal Hadi Salim struct xfrm_state *x; 129053bc6b4dSJamal Hadi Salim int err; 129153bc6b4dSJamal Hadi Salim struct xfrm_user_expire *ue = NLMSG_DATA(nlh); 129253bc6b4dSJamal Hadi Salim struct xfrm_usersa_info *p = &ue->state; 129353bc6b4dSJamal Hadi Salim 129453bc6b4dSJamal Hadi Salim x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); 129553bc6b4dSJamal Hadi Salim err = -ENOENT; 129653bc6b4dSJamal Hadi Salim 129753bc6b4dSJamal Hadi Salim if (x == NULL) 129853bc6b4dSJamal Hadi Salim return err; 129953bc6b4dSJamal Hadi Salim 130053bc6b4dSJamal Hadi Salim err = -EINVAL; 130153bc6b4dSJamal Hadi Salim 130253bc6b4dSJamal Hadi Salim spin_lock_bh(&x->lock); 130353bc6b4dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 130453bc6b4dSJamal Hadi Salim goto out; 130553bc6b4dSJamal Hadi Salim km_state_expired(x, ue->hard, current->pid); 130653bc6b4dSJamal Hadi Salim 130753bc6b4dSJamal Hadi Salim if (ue->hard) 130853bc6b4dSJamal Hadi Salim __xfrm_state_delete(x); 130953bc6b4dSJamal Hadi Salim out: 131053bc6b4dSJamal Hadi Salim spin_unlock_bh(&x->lock); 131153bc6b4dSJamal Hadi Salim xfrm_state_put(x); 131253bc6b4dSJamal Hadi Salim return err; 131353bc6b4dSJamal Hadi Salim } 131453bc6b4dSJamal Hadi Salim 1315980ebd25SJamal Hadi Salim static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 1316980ebd25SJamal Hadi Salim { 1317980ebd25SJamal Hadi Salim struct xfrm_policy *xp; 1318980ebd25SJamal Hadi Salim struct xfrm_user_tmpl *ut; 1319980ebd25SJamal Hadi Salim int i; 1320980ebd25SJamal Hadi Salim struct rtattr *rt = xfrma[XFRMA_TMPL-1]; 1321980ebd25SJamal Hadi Salim 1322980ebd25SJamal Hadi Salim struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); 1323980ebd25SJamal Hadi Salim struct xfrm_state *x = xfrm_state_alloc(); 1324980ebd25SJamal Hadi Salim int err = -ENOMEM; 1325980ebd25SJamal Hadi Salim 1326980ebd25SJamal Hadi Salim if (!x) 1327980ebd25SJamal Hadi Salim return err; 1328980ebd25SJamal Hadi Salim 1329980ebd25SJamal Hadi Salim err = verify_newpolicy_info(&ua->policy); 1330980ebd25SJamal Hadi Salim if (err) { 1331980ebd25SJamal Hadi Salim printk("BAD policy passed\n"); 1332980ebd25SJamal Hadi Salim kfree(x); 1333980ebd25SJamal Hadi Salim return err; 1334980ebd25SJamal Hadi Salim } 1335980ebd25SJamal Hadi Salim 1336980ebd25SJamal Hadi Salim /* build an XP */ 1337980ebd25SJamal Hadi Salim xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); if (!xp) { 1338980ebd25SJamal Hadi Salim kfree(x); 1339980ebd25SJamal Hadi Salim return err; 1340980ebd25SJamal Hadi Salim } 1341980ebd25SJamal Hadi Salim 1342980ebd25SJamal Hadi Salim memcpy(&x->id, &ua->id, sizeof(ua->id)); 1343980ebd25SJamal Hadi Salim memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); 1344980ebd25SJamal Hadi Salim memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); 1345980ebd25SJamal Hadi Salim 1346980ebd25SJamal Hadi Salim ut = RTA_DATA(rt); 1347980ebd25SJamal Hadi Salim /* extract the templates and for each call km_key */ 1348980ebd25SJamal Hadi Salim for (i = 0; i < xp->xfrm_nr; i++, ut++) { 1349980ebd25SJamal Hadi Salim struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 1350980ebd25SJamal Hadi Salim memcpy(&x->id, &t->id, sizeof(x->id)); 1351980ebd25SJamal Hadi Salim x->props.mode = t->mode; 1352980ebd25SJamal Hadi Salim x->props.reqid = t->reqid; 1353980ebd25SJamal Hadi Salim x->props.family = ut->family; 1354980ebd25SJamal Hadi Salim t->aalgos = ua->aalgos; 1355980ebd25SJamal Hadi Salim t->ealgos = ua->ealgos; 1356980ebd25SJamal Hadi Salim t->calgos = ua->calgos; 1357980ebd25SJamal Hadi Salim err = km_query(x, t, xp); 1358980ebd25SJamal Hadi Salim 1359980ebd25SJamal Hadi Salim } 1360980ebd25SJamal Hadi Salim 1361980ebd25SJamal Hadi Salim kfree(x); 1362980ebd25SJamal Hadi Salim kfree(xp); 1363980ebd25SJamal Hadi Salim 1364980ebd25SJamal Hadi Salim return 0; 1365980ebd25SJamal Hadi Salim } 1366980ebd25SJamal Hadi Salim 1367d51d081dSJamal Hadi Salim 1368492b558bSThomas Graf #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) 1369492b558bSThomas Graf 1370492b558bSThomas Graf static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 1371492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 1372492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 1373492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 1374492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 1375492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 1376492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 1377492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 1378980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 137953bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 1380492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 1381492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 13826c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 1383492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 1384492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), 1385d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 1386d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 13871da177e4SLinus Torvalds }; 13881da177e4SLinus Torvalds 1389492b558bSThomas Graf #undef XMSGSIZE 1390492b558bSThomas Graf 13911da177e4SLinus Torvalds static struct xfrm_link { 13921da177e4SLinus Torvalds int (*doit)(struct sk_buff *, struct nlmsghdr *, void **); 13931da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 1394492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 1395492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 1396492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 1397492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 1398492b558bSThomas Graf .dump = xfrm_dump_sa }, 1399492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 1400492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 1401492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 1402492b558bSThomas Graf .dump = xfrm_dump_policy }, 1403492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 1404980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, 140553bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, 1406492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 1407492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 14086c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, 1409492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 1410492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 1411d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, 1412d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, 14131da177e4SLinus Torvalds }; 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) 14161da177e4SLinus Torvalds { 14171da177e4SLinus Torvalds struct rtattr *xfrma[XFRMA_MAX]; 14181da177e4SLinus Torvalds struct xfrm_link *link; 14191da177e4SLinus Torvalds int type, min_len; 14201da177e4SLinus Torvalds 14211da177e4SLinus Torvalds if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) 14221da177e4SLinus Torvalds return 0; 14231da177e4SLinus Torvalds 14241da177e4SLinus Torvalds type = nlh->nlmsg_type; 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds /* A control message: ignore them */ 14271da177e4SLinus Torvalds if (type < XFRM_MSG_BASE) 14281da177e4SLinus Torvalds return 0; 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds /* Unknown message: reply with EINVAL */ 14311da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 14321da177e4SLinus Torvalds goto err_einval; 14331da177e4SLinus Torvalds 14341da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 14351da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 14361da177e4SLinus Torvalds 14371da177e4SLinus Torvalds /* All operations require privileges, even GET */ 1438*c7bdb545SDarrel Goeddel if (security_netlink_recv(skb, CAP_NET_ADMIN)) { 14391da177e4SLinus Torvalds *errp = -EPERM; 14401da177e4SLinus Torvalds return -1; 14411da177e4SLinus Torvalds } 14421da177e4SLinus Torvalds 1443492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 1444492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 1445492b558bSThomas Graf (nlh->nlmsg_flags & NLM_F_DUMP)) { 14461da177e4SLinus Torvalds if (link->dump == NULL) 14471da177e4SLinus Torvalds goto err_einval; 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh, 1450a8f74b22SThomas Graf link->dump, NULL)) != 0) { 14511da177e4SLinus Torvalds return -1; 14521da177e4SLinus Torvalds } 145388fc2c84SThomas Graf 145488fc2c84SThomas Graf netlink_queue_skip(nlh, skb); 14551da177e4SLinus Torvalds return -1; 14561da177e4SLinus Torvalds } 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds memset(xfrma, 0, sizeof(xfrma)); 14591da177e4SLinus Torvalds 14601da177e4SLinus Torvalds if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) 14611da177e4SLinus Torvalds goto err_einval; 14621da177e4SLinus Torvalds 14631da177e4SLinus Torvalds if (nlh->nlmsg_len > min_len) { 14641da177e4SLinus Torvalds int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 14651da177e4SLinus Torvalds struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); 14661da177e4SLinus Torvalds 14671da177e4SLinus Torvalds while (RTA_OK(attr, attrlen)) { 14681da177e4SLinus Torvalds unsigned short flavor = attr->rta_type; 14691da177e4SLinus Torvalds if (flavor) { 14701da177e4SLinus Torvalds if (flavor > XFRMA_MAX) 14711da177e4SLinus Torvalds goto err_einval; 14721da177e4SLinus Torvalds xfrma[flavor - 1] = attr; 14731da177e4SLinus Torvalds } 14741da177e4SLinus Torvalds attr = RTA_NEXT(attr, attrlen); 14751da177e4SLinus Torvalds } 14761da177e4SLinus Torvalds } 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds if (link->doit == NULL) 14791da177e4SLinus Torvalds goto err_einval; 14801da177e4SLinus Torvalds *errp = link->doit(skb, nlh, (void **) &xfrma); 14811da177e4SLinus Torvalds 14821da177e4SLinus Torvalds return *errp; 14831da177e4SLinus Torvalds 14841da177e4SLinus Torvalds err_einval: 14851da177e4SLinus Torvalds *errp = -EINVAL; 14861da177e4SLinus Torvalds return -1; 14871da177e4SLinus Torvalds } 14881da177e4SLinus Torvalds 14891da177e4SLinus Torvalds static void xfrm_netlink_rcv(struct sock *sk, int len) 14901da177e4SLinus Torvalds { 149188fc2c84SThomas Graf unsigned int qlen = 0; 14922a0a6ebeSHerbert Xu 14931da177e4SLinus Torvalds do { 14944a3e2f71SArjan van de Ven mutex_lock(&xfrm_cfg_mutex); 149588fc2c84SThomas Graf netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); 14964a3e2f71SArjan van de Ven mutex_unlock(&xfrm_cfg_mutex); 14971da177e4SLinus Torvalds 14982a0a6ebeSHerbert Xu } while (qlen); 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds 1501d51d081dSJamal Hadi Salim static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) 15021da177e4SLinus Torvalds { 15031da177e4SLinus Torvalds struct xfrm_user_expire *ue; 15041da177e4SLinus Torvalds struct nlmsghdr *nlh; 15051da177e4SLinus Torvalds unsigned char *b = skb->tail; 15061da177e4SLinus Torvalds 1507d51d081dSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE, 15081da177e4SLinus Torvalds sizeof(*ue)); 15091da177e4SLinus Torvalds ue = NLMSG_DATA(nlh); 15101da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 1513d51d081dSJamal Hadi Salim ue->hard = (c->data.hard != 0) ? 1 : 0; 15141da177e4SLinus Torvalds 15151da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 15161da177e4SLinus Torvalds return skb->len; 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds nlmsg_failure: 15191da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 15201da177e4SLinus Torvalds return -1; 15211da177e4SLinus Torvalds } 15221da177e4SLinus Torvalds 152326b15dadSJamal Hadi Salim static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) 15241da177e4SLinus Torvalds { 15251da177e4SLinus Torvalds struct sk_buff *skb; 1526ee57eef9SJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); 15271da177e4SLinus Torvalds 1528ee57eef9SJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 15291da177e4SLinus Torvalds if (skb == NULL) 15301da177e4SLinus Torvalds return -ENOMEM; 15311da177e4SLinus Torvalds 1532d51d081dSJamal Hadi Salim if (build_expire(skb, x, c) < 0) 15331da177e4SLinus Torvalds BUG(); 15341da177e4SLinus Torvalds 1535ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; 1536ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); 15371da177e4SLinus Torvalds } 15381da177e4SLinus Torvalds 1539d51d081dSJamal Hadi Salim static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) 1540d51d081dSJamal Hadi Salim { 1541d51d081dSJamal Hadi Salim struct sk_buff *skb; 1542d51d081dSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); 1543d51d081dSJamal Hadi Salim 1544d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_replay_state)); 1545d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); 1546d51d081dSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 1547d51d081dSJamal Hadi Salim if (skb == NULL) 1548d51d081dSJamal Hadi Salim return -ENOMEM; 1549d51d081dSJamal Hadi Salim 1550d51d081dSJamal Hadi Salim if (build_aevent(skb, x, c) < 0) 1551d51d081dSJamal Hadi Salim BUG(); 1552d51d081dSJamal Hadi Salim 1553d51d081dSJamal Hadi Salim NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; 1554d51d081dSJamal Hadi Salim return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); 1555d51d081dSJamal Hadi Salim } 1556d51d081dSJamal Hadi Salim 155726b15dadSJamal Hadi Salim static int xfrm_notify_sa_flush(struct km_event *c) 155826b15dadSJamal Hadi Salim { 155926b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 156026b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 156126b15dadSJamal Hadi Salim struct sk_buff *skb; 156226b15dadSJamal Hadi Salim unsigned char *b; 156326b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); 156426b15dadSJamal Hadi Salim 156526b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 156626b15dadSJamal Hadi Salim if (skb == NULL) 156726b15dadSJamal Hadi Salim return -ENOMEM; 156826b15dadSJamal Hadi Salim b = skb->tail; 156926b15dadSJamal Hadi Salim 157026b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, 157126b15dadSJamal Hadi Salim XFRM_MSG_FLUSHSA, sizeof(*p)); 157226b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 157326b15dadSJamal Hadi Salim 157426b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 1575bf08867fSHerbert Xu p->proto = c->data.proto; 157626b15dadSJamal Hadi Salim 157726b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 157826b15dadSJamal Hadi Salim 1579ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; 1580ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); 158126b15dadSJamal Hadi Salim 158226b15dadSJamal Hadi Salim nlmsg_failure: 158326b15dadSJamal Hadi Salim kfree_skb(skb); 158426b15dadSJamal Hadi Salim return -1; 158526b15dadSJamal Hadi Salim } 158626b15dadSJamal Hadi Salim 158726b15dadSJamal Hadi Salim static int inline xfrm_sa_len(struct xfrm_state *x) 158826b15dadSJamal Hadi Salim { 15890603eac0SHerbert Xu int l = 0; 159026b15dadSJamal Hadi Salim if (x->aalg) 159126b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); 159226b15dadSJamal Hadi Salim if (x->ealg) 159326b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); 159426b15dadSJamal Hadi Salim if (x->calg) 159526b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->calg)); 159626b15dadSJamal Hadi Salim if (x->encap) 159726b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->encap)); 159826b15dadSJamal Hadi Salim 159926b15dadSJamal Hadi Salim return l; 160026b15dadSJamal Hadi Salim } 160126b15dadSJamal Hadi Salim 160226b15dadSJamal Hadi Salim static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) 160326b15dadSJamal Hadi Salim { 160426b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 16050603eac0SHerbert Xu struct xfrm_usersa_id *id; 160626b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 160726b15dadSJamal Hadi Salim struct sk_buff *skb; 160826b15dadSJamal Hadi Salim unsigned char *b; 160926b15dadSJamal Hadi Salim int len = xfrm_sa_len(x); 16100603eac0SHerbert Xu int headlen; 16110603eac0SHerbert Xu 16120603eac0SHerbert Xu headlen = sizeof(*p); 16130603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 16140603eac0SHerbert Xu len += RTA_SPACE(headlen); 16150603eac0SHerbert Xu headlen = sizeof(*id); 16160603eac0SHerbert Xu } 16170603eac0SHerbert Xu len += NLMSG_SPACE(headlen); 161826b15dadSJamal Hadi Salim 161926b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 162026b15dadSJamal Hadi Salim if (skb == NULL) 162126b15dadSJamal Hadi Salim return -ENOMEM; 162226b15dadSJamal Hadi Salim b = skb->tail; 162326b15dadSJamal Hadi Salim 16240603eac0SHerbert Xu nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); 162526b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 162626b15dadSJamal Hadi Salim 162726b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 16280603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 16290603eac0SHerbert Xu id = NLMSG_DATA(nlh); 16300603eac0SHerbert Xu memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); 16310603eac0SHerbert Xu id->spi = x->id.spi; 16320603eac0SHerbert Xu id->family = x->props.family; 16330603eac0SHerbert Xu id->proto = x->id.proto; 16340603eac0SHerbert Xu 16350603eac0SHerbert Xu p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); 16360603eac0SHerbert Xu } 16370603eac0SHerbert Xu 163826b15dadSJamal Hadi Salim copy_to_user_state(x, p); 163926b15dadSJamal Hadi Salim 164026b15dadSJamal Hadi Salim if (x->aalg) 164126b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_AUTH, 164226b15dadSJamal Hadi Salim sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 164326b15dadSJamal Hadi Salim if (x->ealg) 164426b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_CRYPT, 164526b15dadSJamal Hadi Salim sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 164626b15dadSJamal Hadi Salim if (x->calg) 164726b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 164826b15dadSJamal Hadi Salim 164926b15dadSJamal Hadi Salim if (x->encap) 165026b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 165126b15dadSJamal Hadi Salim 165226b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 165326b15dadSJamal Hadi Salim 1654ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; 1655ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); 165626b15dadSJamal Hadi Salim 165726b15dadSJamal Hadi Salim nlmsg_failure: 165826b15dadSJamal Hadi Salim rtattr_failure: 165926b15dadSJamal Hadi Salim kfree_skb(skb); 166026b15dadSJamal Hadi Salim return -1; 166126b15dadSJamal Hadi Salim } 166226b15dadSJamal Hadi Salim 166326b15dadSJamal Hadi Salim static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) 166426b15dadSJamal Hadi Salim { 166526b15dadSJamal Hadi Salim 166626b15dadSJamal Hadi Salim switch (c->event) { 1667f60f6b8fSHerbert Xu case XFRM_MSG_EXPIRE: 166826b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 1669d51d081dSJamal Hadi Salim case XFRM_MSG_NEWAE: 1670d51d081dSJamal Hadi Salim return xfrm_aevent_state_notify(x, c); 1671f60f6b8fSHerbert Xu case XFRM_MSG_DELSA: 1672f60f6b8fSHerbert Xu case XFRM_MSG_UPDSA: 1673f60f6b8fSHerbert Xu case XFRM_MSG_NEWSA: 167426b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 1675f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHSA: 167626b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 167726b15dadSJamal Hadi Salim default: 167826b15dadSJamal Hadi Salim printk("xfrm_user: Unknown SA event %d\n", c->event); 167926b15dadSJamal Hadi Salim break; 168026b15dadSJamal Hadi Salim } 168126b15dadSJamal Hadi Salim 168226b15dadSJamal Hadi Salim return 0; 168326b15dadSJamal Hadi Salim 168426b15dadSJamal Hadi Salim } 168526b15dadSJamal Hadi Salim 16861da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 16871da177e4SLinus Torvalds struct xfrm_tmpl *xt, struct xfrm_policy *xp, 16881da177e4SLinus Torvalds int dir) 16891da177e4SLinus Torvalds { 16901da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 16911da177e4SLinus Torvalds struct nlmsghdr *nlh; 16921da177e4SLinus Torvalds unsigned char *b = skb->tail; 16931da177e4SLinus Torvalds __u32 seq = xfrm_get_acqseq(); 16941da177e4SLinus Torvalds 16951da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, 16961da177e4SLinus Torvalds sizeof(*ua)); 16971da177e4SLinus Torvalds ua = NLMSG_DATA(nlh); 16981da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 16991da177e4SLinus Torvalds 17001da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 17011da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 17021da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 17031da177e4SLinus Torvalds copy_to_user_policy(xp, &ua->policy, dir); 17041da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 17051da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 17061da177e4SLinus Torvalds ua->calgos = xt->calgos; 17071da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 17081da177e4SLinus Torvalds 17091da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 17101da177e4SLinus Torvalds goto nlmsg_failure; 1711df71837dSTrent Jaeger if (copy_to_user_sec_ctx(xp, skb)) 1712df71837dSTrent Jaeger goto nlmsg_failure; 17131da177e4SLinus Torvalds 17141da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 17151da177e4SLinus Torvalds return skb->len; 17161da177e4SLinus Torvalds 17171da177e4SLinus Torvalds nlmsg_failure: 17181da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 17191da177e4SLinus Torvalds return -1; 17201da177e4SLinus Torvalds } 17211da177e4SLinus Torvalds 17221da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 17231da177e4SLinus Torvalds struct xfrm_policy *xp, int dir) 17241da177e4SLinus Torvalds { 17251da177e4SLinus Torvalds struct sk_buff *skb; 17261da177e4SLinus Torvalds size_t len; 17271da177e4SLinus Torvalds 17281da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 17291da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); 1730df71837dSTrent Jaeger len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); 17311da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 17321da177e4SLinus Torvalds if (skb == NULL) 17331da177e4SLinus Torvalds return -ENOMEM; 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds if (build_acquire(skb, x, xt, xp, dir) < 0) 17361da177e4SLinus Torvalds BUG(); 17371da177e4SLinus Torvalds 1738ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; 1739ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); 17401da177e4SLinus Torvalds } 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 17431da177e4SLinus Torvalds * or more templates. 17441da177e4SLinus Torvalds */ 17451da177e4SLinus Torvalds static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt, 17461da177e4SLinus Torvalds u8 *data, int len, int *dir) 17471da177e4SLinus Torvalds { 17481da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 17491da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 17501da177e4SLinus Torvalds struct xfrm_policy *xp; 17511da177e4SLinus Torvalds int nr; 17521da177e4SLinus Torvalds 17531da177e4SLinus Torvalds switch (family) { 17541da177e4SLinus Torvalds case AF_INET: 17551da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 17561da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 17571da177e4SLinus Torvalds return NULL; 17581da177e4SLinus Torvalds } 17591da177e4SLinus Torvalds break; 17601da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 17611da177e4SLinus Torvalds case AF_INET6: 17621da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 17631da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 17641da177e4SLinus Torvalds return NULL; 17651da177e4SLinus Torvalds } 17661da177e4SLinus Torvalds break; 17671da177e4SLinus Torvalds #endif 17681da177e4SLinus Torvalds default: 17691da177e4SLinus Torvalds *dir = -EINVAL; 17701da177e4SLinus Torvalds return NULL; 17711da177e4SLinus Torvalds } 17721da177e4SLinus Torvalds 17731da177e4SLinus Torvalds *dir = -EINVAL; 17741da177e4SLinus Torvalds 17751da177e4SLinus Torvalds if (len < sizeof(*p) || 17761da177e4SLinus Torvalds verify_newpolicy_info(p)) 17771da177e4SLinus Torvalds return NULL; 17781da177e4SLinus Torvalds 17791da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 17801da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 17811da177e4SLinus Torvalds return NULL; 17821da177e4SLinus Torvalds 1783a4f1bac6SHerbert Xu if (p->dir > XFRM_POLICY_OUT) 1784a4f1bac6SHerbert Xu return NULL; 1785a4f1bac6SHerbert Xu 17861da177e4SLinus Torvalds xp = xfrm_policy_alloc(GFP_KERNEL); 17871da177e4SLinus Torvalds if (xp == NULL) { 17881da177e4SLinus Torvalds *dir = -ENOBUFS; 17891da177e4SLinus Torvalds return NULL; 17901da177e4SLinus Torvalds } 17911da177e4SLinus Torvalds 17921da177e4SLinus Torvalds copy_from_user_policy(xp, p); 17931da177e4SLinus Torvalds copy_templates(xp, ut, nr); 17941da177e4SLinus Torvalds 17951da177e4SLinus Torvalds *dir = p->dir; 17961da177e4SLinus Torvalds 17971da177e4SLinus Torvalds return xp; 17981da177e4SLinus Torvalds } 17991da177e4SLinus Torvalds 18001da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 1801d51d081dSJamal Hadi Salim int dir, struct km_event *c) 18021da177e4SLinus Torvalds { 18031da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 18041da177e4SLinus Torvalds struct nlmsghdr *nlh; 1805d51d081dSJamal Hadi Salim int hard = c->data.hard; 18061da177e4SLinus Torvalds unsigned char *b = skb->tail; 18071da177e4SLinus Torvalds 1808d51d081dSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); 18091da177e4SLinus Torvalds upe = NLMSG_DATA(nlh); 18101da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 18111da177e4SLinus Torvalds 18121da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 18131da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 18141da177e4SLinus Torvalds goto nlmsg_failure; 1815df71837dSTrent Jaeger if (copy_to_user_sec_ctx(xp, skb)) 1816df71837dSTrent Jaeger goto nlmsg_failure; 18171da177e4SLinus Torvalds upe->hard = !!hard; 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 18201da177e4SLinus Torvalds return skb->len; 18211da177e4SLinus Torvalds 18221da177e4SLinus Torvalds nlmsg_failure: 18231da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 18241da177e4SLinus Torvalds return -1; 18251da177e4SLinus Torvalds } 18261da177e4SLinus Torvalds 182726b15dadSJamal Hadi Salim static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 18281da177e4SLinus Torvalds { 18291da177e4SLinus Torvalds struct sk_buff *skb; 18301da177e4SLinus Torvalds size_t len; 18311da177e4SLinus Torvalds 18321da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 18331da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); 1834df71837dSTrent Jaeger len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); 18351da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 18361da177e4SLinus Torvalds if (skb == NULL) 18371da177e4SLinus Torvalds return -ENOMEM; 18381da177e4SLinus Torvalds 1839d51d081dSJamal Hadi Salim if (build_polexpire(skb, xp, dir, c) < 0) 18401da177e4SLinus Torvalds BUG(); 18411da177e4SLinus Torvalds 1842ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; 1843ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); 18441da177e4SLinus Torvalds } 18451da177e4SLinus Torvalds 184626b15dadSJamal Hadi Salim static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) 184726b15dadSJamal Hadi Salim { 184826b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 18490603eac0SHerbert Xu struct xfrm_userpolicy_id *id; 185026b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 185126b15dadSJamal Hadi Salim struct sk_buff *skb; 185226b15dadSJamal Hadi Salim unsigned char *b; 185326b15dadSJamal Hadi Salim int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 18540603eac0SHerbert Xu int headlen; 18550603eac0SHerbert Xu 18560603eac0SHerbert Xu headlen = sizeof(*p); 18570603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 18580603eac0SHerbert Xu len += RTA_SPACE(headlen); 18590603eac0SHerbert Xu headlen = sizeof(*id); 18600603eac0SHerbert Xu } 18610603eac0SHerbert Xu len += NLMSG_SPACE(headlen); 186226b15dadSJamal Hadi Salim 186326b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 186426b15dadSJamal Hadi Salim if (skb == NULL) 186526b15dadSJamal Hadi Salim return -ENOMEM; 186626b15dadSJamal Hadi Salim b = skb->tail; 186726b15dadSJamal Hadi Salim 18680603eac0SHerbert Xu nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); 186926b15dadSJamal Hadi Salim 187026b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 18710603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 18720603eac0SHerbert Xu id = NLMSG_DATA(nlh); 18730603eac0SHerbert Xu memset(id, 0, sizeof(*id)); 18740603eac0SHerbert Xu id->dir = dir; 18750603eac0SHerbert Xu if (c->data.byid) 18760603eac0SHerbert Xu id->index = xp->index; 18770603eac0SHerbert Xu else 18780603eac0SHerbert Xu memcpy(&id->sel, &xp->selector, sizeof(id->sel)); 18790603eac0SHerbert Xu 18800603eac0SHerbert Xu p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); 18810603eac0SHerbert Xu } 188226b15dadSJamal Hadi Salim 188326b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 188426b15dadSJamal Hadi Salim 188526b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 188626b15dadSJamal Hadi Salim if (copy_to_user_tmpl(xp, skb) < 0) 188726b15dadSJamal Hadi Salim goto nlmsg_failure; 188826b15dadSJamal Hadi Salim 188926b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 189026b15dadSJamal Hadi Salim 1891ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; 1892ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); 189326b15dadSJamal Hadi Salim 189426b15dadSJamal Hadi Salim nlmsg_failure: 18950603eac0SHerbert Xu rtattr_failure: 189626b15dadSJamal Hadi Salim kfree_skb(skb); 189726b15dadSJamal Hadi Salim return -1; 189826b15dadSJamal Hadi Salim } 189926b15dadSJamal Hadi Salim 190026b15dadSJamal Hadi Salim static int xfrm_notify_policy_flush(struct km_event *c) 190126b15dadSJamal Hadi Salim { 190226b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 190326b15dadSJamal Hadi Salim struct sk_buff *skb; 190426b15dadSJamal Hadi Salim unsigned char *b; 190526b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(0); 190626b15dadSJamal Hadi Salim 190726b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 190826b15dadSJamal Hadi Salim if (skb == NULL) 190926b15dadSJamal Hadi Salim return -ENOMEM; 191026b15dadSJamal Hadi Salim b = skb->tail; 191126b15dadSJamal Hadi Salim 191226b15dadSJamal Hadi Salim 191326b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); 191426b15dadSJamal Hadi Salim 191526b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 191626b15dadSJamal Hadi Salim 1917ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; 1918ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); 191926b15dadSJamal Hadi Salim 192026b15dadSJamal Hadi Salim nlmsg_failure: 192126b15dadSJamal Hadi Salim kfree_skb(skb); 192226b15dadSJamal Hadi Salim return -1; 192326b15dadSJamal Hadi Salim } 192426b15dadSJamal Hadi Salim 192526b15dadSJamal Hadi Salim static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 192626b15dadSJamal Hadi Salim { 192726b15dadSJamal Hadi Salim 192826b15dadSJamal Hadi Salim switch (c->event) { 1929f60f6b8fSHerbert Xu case XFRM_MSG_NEWPOLICY: 1930f60f6b8fSHerbert Xu case XFRM_MSG_UPDPOLICY: 1931f60f6b8fSHerbert Xu case XFRM_MSG_DELPOLICY: 193226b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 1933f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHPOLICY: 193426b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 1935f60f6b8fSHerbert Xu case XFRM_MSG_POLEXPIRE: 193626b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 193726b15dadSJamal Hadi Salim default: 193826b15dadSJamal Hadi Salim printk("xfrm_user: Unknown Policy event %d\n", c->event); 193926b15dadSJamal Hadi Salim } 194026b15dadSJamal Hadi Salim 194126b15dadSJamal Hadi Salim return 0; 194226b15dadSJamal Hadi Salim 194326b15dadSJamal Hadi Salim } 194426b15dadSJamal Hadi Salim 19451da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 19461da177e4SLinus Torvalds .id = "netlink", 19471da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 19481da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 19491da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 19501da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 19511da177e4SLinus Torvalds }; 19521da177e4SLinus Torvalds 19531da177e4SLinus Torvalds static int __init xfrm_user_init(void) 19541da177e4SLinus Torvalds { 1955be33690dSPatrick McHardy struct sock *nlsk; 1956be33690dSPatrick McHardy 19571da177e4SLinus Torvalds printk(KERN_INFO "Initializing IPsec netlink socket\n"); 19581da177e4SLinus Torvalds 1959be33690dSPatrick McHardy nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, 196006628607SPatrick McHardy xfrm_netlink_rcv, THIS_MODULE); 1961be33690dSPatrick McHardy if (nlsk == NULL) 19621da177e4SLinus Torvalds return -ENOMEM; 1963be33690dSPatrick McHardy rcu_assign_pointer(xfrm_nl, nlsk); 19641da177e4SLinus Torvalds 19651da177e4SLinus Torvalds xfrm_register_km(&netlink_mgr); 19661da177e4SLinus Torvalds 19671da177e4SLinus Torvalds return 0; 19681da177e4SLinus Torvalds } 19691da177e4SLinus Torvalds 19701da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 19711da177e4SLinus Torvalds { 1972be33690dSPatrick McHardy struct sock *nlsk = xfrm_nl; 1973be33690dSPatrick McHardy 19741da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 1975be33690dSPatrick McHardy rcu_assign_pointer(xfrm_nl, NULL); 1976be33690dSPatrick McHardy synchronize_rcu(); 1977be33690dSPatrick McHardy sock_release(nlsk->sk_socket); 19781da177e4SLinus Torvalds } 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds module_init(xfrm_user_init); 19811da177e4SLinus Torvalds module_exit(xfrm_user_exit); 19821da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 19834fdb3bb7SHarald Welte MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); 1984f8cd5488SJamal Hadi Salim 1985