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 139409f38aSHerbert Xu #include <linux/crypto.h> 141da177e4SLinus Torvalds #include <linux/module.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/types.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/socket.h> 191da177e4SLinus Torvalds #include <linux/string.h> 201da177e4SLinus Torvalds #include <linux/net.h> 211da177e4SLinus Torvalds #include <linux/skbuff.h> 221da177e4SLinus Torvalds #include <linux/rtnetlink.h> 231da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 241da177e4SLinus Torvalds #include <linux/ipsec.h> 251da177e4SLinus Torvalds #include <linux/init.h> 261da177e4SLinus Torvalds #include <linux/security.h> 271da177e4SLinus Torvalds #include <net/sock.h> 281da177e4SLinus Torvalds #include <net/xfrm.h> 2988fc2c84SThomas Graf #include <net/netlink.h> 301da177e4SLinus Torvalds #include <asm/uaccess.h> 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) 331da177e4SLinus Torvalds { 341da177e4SLinus Torvalds struct rtattr *rt = xfrma[type - 1]; 351da177e4SLinus Torvalds struct xfrm_algo *algp; 3631c26852SHerbert Xu int len; 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds if (!rt) 391da177e4SLinus Torvalds return 0; 401da177e4SLinus Torvalds 4131c26852SHerbert Xu len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); 4231c26852SHerbert Xu if (len < 0) 431da177e4SLinus Torvalds return -EINVAL; 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds algp = RTA_DATA(rt); 4631c26852SHerbert Xu 4731c26852SHerbert Xu len -= (algp->alg_key_len + 7U) / 8; 4831c26852SHerbert Xu if (len < 0) 4931c26852SHerbert Xu return -EINVAL; 5031c26852SHerbert Xu 511da177e4SLinus Torvalds switch (type) { 521da177e4SLinus Torvalds case XFRMA_ALG_AUTH: 531da177e4SLinus Torvalds if (!algp->alg_key_len && 541da177e4SLinus Torvalds strcmp(algp->alg_name, "digest_null") != 0) 551da177e4SLinus Torvalds return -EINVAL; 561da177e4SLinus Torvalds break; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds case XFRMA_ALG_CRYPT: 591da177e4SLinus Torvalds if (!algp->alg_key_len && 601da177e4SLinus Torvalds strcmp(algp->alg_name, "cipher_null") != 0) 611da177e4SLinus Torvalds return -EINVAL; 621da177e4SLinus Torvalds break; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds case XFRMA_ALG_COMP: 651da177e4SLinus Torvalds /* Zero length keys are legal. */ 661da177e4SLinus Torvalds break; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds default: 691da177e4SLinus Torvalds return -EINVAL; 701da177e4SLinus Torvalds }; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; 731da177e4SLinus Torvalds return 0; 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds static int verify_encap_tmpl(struct rtattr **xfrma) 771da177e4SLinus Torvalds { 781da177e4SLinus Torvalds struct rtattr *rt = xfrma[XFRMA_ENCAP - 1]; 791da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds if (!rt) 821da177e4SLinus Torvalds return 0; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap)) 851da177e4SLinus Torvalds return -EINVAL; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds return 0; 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds 90df71837dSTrent Jaeger 91df71837dSTrent Jaeger static inline int verify_sec_ctx_len(struct rtattr **xfrma) 92df71837dSTrent Jaeger { 93df71837dSTrent Jaeger struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1]; 94df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 95df71837dSTrent Jaeger int len = 0; 96df71837dSTrent Jaeger 97df71837dSTrent Jaeger if (!rt) 98df71837dSTrent Jaeger return 0; 99df71837dSTrent Jaeger 100df71837dSTrent Jaeger if (rt->rta_len < sizeof(*uctx)) 101df71837dSTrent Jaeger return -EINVAL; 102df71837dSTrent Jaeger 103df71837dSTrent Jaeger uctx = RTA_DATA(rt); 104df71837dSTrent Jaeger 105df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 106df71837dSTrent Jaeger len += uctx->ctx_len; 107df71837dSTrent Jaeger 108df71837dSTrent Jaeger if (uctx->len != len) 109df71837dSTrent Jaeger return -EINVAL; 110df71837dSTrent Jaeger 111df71837dSTrent Jaeger return 0; 112df71837dSTrent Jaeger } 113df71837dSTrent Jaeger 114df71837dSTrent Jaeger 1151da177e4SLinus Torvalds static int verify_newsa_info(struct xfrm_usersa_info *p, 1161da177e4SLinus Torvalds struct rtattr **xfrma) 1171da177e4SLinus Torvalds { 1181da177e4SLinus Torvalds int err; 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds err = -EINVAL; 1211da177e4SLinus Torvalds switch (p->family) { 1221da177e4SLinus Torvalds case AF_INET: 1231da177e4SLinus Torvalds break; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds case AF_INET6: 1261da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1271da177e4SLinus Torvalds break; 1281da177e4SLinus Torvalds #else 1291da177e4SLinus Torvalds err = -EAFNOSUPPORT; 1301da177e4SLinus Torvalds goto out; 1311da177e4SLinus Torvalds #endif 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds default: 1341da177e4SLinus Torvalds goto out; 1351da177e4SLinus Torvalds }; 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds err = -EINVAL; 1381da177e4SLinus Torvalds switch (p->id.proto) { 1391da177e4SLinus Torvalds case IPPROTO_AH: 1401da177e4SLinus Torvalds if (!xfrma[XFRMA_ALG_AUTH-1] || 1411da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1] || 1421da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]) 1431da177e4SLinus Torvalds goto out; 1441da177e4SLinus Torvalds break; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds case IPPROTO_ESP: 1471da177e4SLinus Torvalds if ((!xfrma[XFRMA_ALG_AUTH-1] && 1481da177e4SLinus Torvalds !xfrma[XFRMA_ALG_CRYPT-1]) || 1491da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]) 1501da177e4SLinus Torvalds goto out; 1511da177e4SLinus Torvalds break; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds case IPPROTO_COMP: 1541da177e4SLinus Torvalds if (!xfrma[XFRMA_ALG_COMP-1] || 1551da177e4SLinus Torvalds xfrma[XFRMA_ALG_AUTH-1] || 1561da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1]) 1571da177e4SLinus Torvalds goto out; 1581da177e4SLinus Torvalds break; 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds default: 1611da177e4SLinus Torvalds goto out; 1621da177e4SLinus Torvalds }; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH))) 1651da177e4SLinus Torvalds goto out; 1661da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT))) 1671da177e4SLinus Torvalds goto out; 1681da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP))) 1691da177e4SLinus Torvalds goto out; 1701da177e4SLinus Torvalds if ((err = verify_encap_tmpl(xfrma))) 1711da177e4SLinus Torvalds goto out; 172df71837dSTrent Jaeger if ((err = verify_sec_ctx_len(xfrma))) 173df71837dSTrent Jaeger goto out; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds err = -EINVAL; 1761da177e4SLinus Torvalds switch (p->mode) { 1777e49e6deSMasahide NAKAMURA case XFRM_MODE_TRANSPORT: 1787e49e6deSMasahide NAKAMURA case XFRM_MODE_TUNNEL: 1791da177e4SLinus Torvalds break; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds default: 1821da177e4SLinus Torvalds goto out; 1831da177e4SLinus Torvalds }; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds err = 0; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds out: 1881da177e4SLinus Torvalds return err; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, 1921da177e4SLinus Torvalds struct xfrm_algo_desc *(*get_byname)(char *, int), 1931da177e4SLinus Torvalds struct rtattr *u_arg) 1941da177e4SLinus Torvalds { 1951da177e4SLinus Torvalds struct rtattr *rta = u_arg; 1961da177e4SLinus Torvalds struct xfrm_algo *p, *ualg; 1971da177e4SLinus Torvalds struct xfrm_algo_desc *algo; 198b9e9deadSHerbert Xu int len; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds if (!rta) 2011da177e4SLinus Torvalds return 0; 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds ualg = RTA_DATA(rta); 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds algo = get_byname(ualg->alg_name, 1); 2061da177e4SLinus Torvalds if (!algo) 2071da177e4SLinus Torvalds return -ENOSYS; 2081da177e4SLinus Torvalds *props = algo->desc.sadb_alg_id; 2091da177e4SLinus Torvalds 210b9e9deadSHerbert Xu len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8; 211b9e9deadSHerbert Xu p = kmalloc(len, GFP_KERNEL); 2121da177e4SLinus Torvalds if (!p) 2131da177e4SLinus Torvalds return -ENOMEM; 2141da177e4SLinus Torvalds 215b9e9deadSHerbert Xu memcpy(p, ualg, len); 21604ff1260SHerbert Xu strcpy(p->alg_name, algo->name); 2171da177e4SLinus Torvalds *algpp = p; 2181da177e4SLinus Torvalds return 0; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg) 2221da177e4SLinus Torvalds { 2231da177e4SLinus Torvalds struct rtattr *rta = u_arg; 2241da177e4SLinus Torvalds struct xfrm_encap_tmpl *p, *uencap; 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds if (!rta) 2271da177e4SLinus Torvalds return 0; 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds uencap = RTA_DATA(rta); 2301da177e4SLinus Torvalds p = kmalloc(sizeof(*p), GFP_KERNEL); 2311da177e4SLinus Torvalds if (!p) 2321da177e4SLinus Torvalds return -ENOMEM; 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds memcpy(p, uencap, sizeof(*p)); 2351da177e4SLinus Torvalds *encapp = p; 2361da177e4SLinus Torvalds return 0; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 239df71837dSTrent Jaeger 240df71837dSTrent Jaeger static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp) 241df71837dSTrent Jaeger { 242df71837dSTrent Jaeger struct xfrm_sec_ctx *xfrm_ctx = xp->security; 243df71837dSTrent Jaeger int len = 0; 244df71837dSTrent Jaeger 245df71837dSTrent Jaeger if (xfrm_ctx) { 246df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 247df71837dSTrent Jaeger len += xfrm_ctx->ctx_len; 248df71837dSTrent Jaeger } 249df71837dSTrent Jaeger return len; 250df71837dSTrent Jaeger } 251df71837dSTrent Jaeger 252df71837dSTrent Jaeger static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg) 253df71837dSTrent Jaeger { 254df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 255df71837dSTrent Jaeger 256df71837dSTrent Jaeger if (!u_arg) 257df71837dSTrent Jaeger return 0; 258df71837dSTrent Jaeger 259df71837dSTrent Jaeger uctx = RTA_DATA(u_arg); 260df71837dSTrent Jaeger return security_xfrm_state_alloc(x, uctx); 261df71837dSTrent Jaeger } 262df71837dSTrent Jaeger 2631da177e4SLinus Torvalds static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 2641da177e4SLinus Torvalds { 2651da177e4SLinus Torvalds memcpy(&x->id, &p->id, sizeof(x->id)); 2661da177e4SLinus Torvalds memcpy(&x->sel, &p->sel, sizeof(x->sel)); 2671da177e4SLinus Torvalds memcpy(&x->lft, &p->lft, sizeof(x->lft)); 2681da177e4SLinus Torvalds x->props.mode = p->mode; 2691da177e4SLinus Torvalds x->props.replay_window = p->replay_window; 2701da177e4SLinus Torvalds x->props.reqid = p->reqid; 2711da177e4SLinus Torvalds x->props.family = p->family; 2721da177e4SLinus Torvalds x->props.saddr = p->saddr; 2731da177e4SLinus Torvalds x->props.flags = p->flags; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 276d51d081dSJamal Hadi Salim /* 277d51d081dSJamal Hadi Salim * someday when pfkey also has support, we could have the code 278d51d081dSJamal Hadi Salim * somehow made shareable and move it to xfrm_state.c - JHS 279d51d081dSJamal Hadi Salim * 280d51d081dSJamal Hadi Salim */ 281d51d081dSJamal Hadi Salim static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma) 282d51d081dSJamal Hadi Salim { 283d51d081dSJamal Hadi Salim int err = - EINVAL; 284d51d081dSJamal Hadi Salim struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; 285d51d081dSJamal Hadi Salim struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; 286d51d081dSJamal Hadi Salim struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1]; 287d51d081dSJamal Hadi Salim struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1]; 288d51d081dSJamal Hadi Salim 289d51d081dSJamal Hadi Salim if (rp) { 290d51d081dSJamal Hadi Salim struct xfrm_replay_state *replay; 291d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(rp) < sizeof(*replay)) 292d51d081dSJamal Hadi Salim goto error; 293d51d081dSJamal Hadi Salim replay = RTA_DATA(rp); 294d51d081dSJamal Hadi Salim memcpy(&x->replay, replay, sizeof(*replay)); 295d51d081dSJamal Hadi Salim memcpy(&x->preplay, replay, sizeof(*replay)); 296d51d081dSJamal Hadi Salim } 297d51d081dSJamal Hadi Salim 298d51d081dSJamal Hadi Salim if (lt) { 299d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur *ltime; 300d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(lt) < sizeof(*ltime)) 301d51d081dSJamal Hadi Salim goto error; 302d51d081dSJamal Hadi Salim ltime = RTA_DATA(lt); 303d51d081dSJamal Hadi Salim x->curlft.bytes = ltime->bytes; 304d51d081dSJamal Hadi Salim x->curlft.packets = ltime->packets; 305d51d081dSJamal Hadi Salim x->curlft.add_time = ltime->add_time; 306d51d081dSJamal Hadi Salim x->curlft.use_time = ltime->use_time; 307d51d081dSJamal Hadi Salim } 308d51d081dSJamal Hadi Salim 309d51d081dSJamal Hadi Salim if (et) { 310d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(et) < sizeof(u32)) 311d51d081dSJamal Hadi Salim goto error; 312d51d081dSJamal Hadi Salim x->replay_maxage = *(u32*)RTA_DATA(et); 313d51d081dSJamal Hadi Salim } 314d51d081dSJamal Hadi Salim 315d51d081dSJamal Hadi Salim if (rt) { 316d51d081dSJamal Hadi Salim if (RTA_PAYLOAD(rt) < sizeof(u32)) 317d51d081dSJamal Hadi Salim goto error; 318d51d081dSJamal Hadi Salim x->replay_maxdiff = *(u32*)RTA_DATA(rt); 319d51d081dSJamal Hadi Salim } 320d51d081dSJamal Hadi Salim 321d51d081dSJamal Hadi Salim return 0; 322d51d081dSJamal Hadi Salim error: 323d51d081dSJamal Hadi Salim return err; 324d51d081dSJamal Hadi Salim } 325d51d081dSJamal Hadi Salim 3261da177e4SLinus Torvalds static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, 3271da177e4SLinus Torvalds struct rtattr **xfrma, 3281da177e4SLinus Torvalds int *errp) 3291da177e4SLinus Torvalds { 3301da177e4SLinus Torvalds struct xfrm_state *x = xfrm_state_alloc(); 3311da177e4SLinus Torvalds int err = -ENOMEM; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds if (!x) 3341da177e4SLinus Torvalds goto error_no_put; 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds copy_from_user_state(x, p); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, 3391da177e4SLinus Torvalds xfrm_aalg_get_byname, 3401da177e4SLinus Torvalds xfrma[XFRMA_ALG_AUTH-1]))) 3411da177e4SLinus Torvalds goto error; 3421da177e4SLinus Torvalds if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, 3431da177e4SLinus Torvalds xfrm_ealg_get_byname, 3441da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1]))) 3451da177e4SLinus Torvalds goto error; 3461da177e4SLinus Torvalds if ((err = attach_one_algo(&x->calg, &x->props.calgo, 3471da177e4SLinus Torvalds xfrm_calg_get_byname, 3481da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]))) 3491da177e4SLinus Torvalds goto error; 3501da177e4SLinus Torvalds if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) 3511da177e4SLinus Torvalds goto error; 3521da177e4SLinus Torvalds 35372cb6962SHerbert Xu err = xfrm_init_state(x); 3541da177e4SLinus Torvalds if (err) 3551da177e4SLinus Torvalds goto error; 3561da177e4SLinus Torvalds 357df71837dSTrent Jaeger if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) 358df71837dSTrent Jaeger goto error; 359df71837dSTrent Jaeger 3601da177e4SLinus Torvalds x->km.seq = p->seq; 361d51d081dSJamal Hadi Salim x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; 362d51d081dSJamal Hadi Salim /* sysctl_xfrm_aevent_etime is in 100ms units */ 363d51d081dSJamal Hadi Salim x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; 364d51d081dSJamal Hadi Salim x->preplay.bitmap = 0; 365d51d081dSJamal Hadi Salim x->preplay.seq = x->replay.seq+x->replay_maxdiff; 366d51d081dSJamal Hadi Salim x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; 367d51d081dSJamal Hadi Salim 368d51d081dSJamal Hadi Salim /* override default values from above */ 369d51d081dSJamal Hadi Salim 370d51d081dSJamal Hadi Salim err = xfrm_update_ae_params(x, (struct rtattr **)xfrma); 371d51d081dSJamal Hadi Salim if (err < 0) 372d51d081dSJamal Hadi Salim goto error; 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds return x; 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds error: 3771da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 3781da177e4SLinus Torvalds xfrm_state_put(x); 3791da177e4SLinus Torvalds error_no_put: 3801da177e4SLinus Torvalds *errp = err; 3811da177e4SLinus Torvalds return NULL; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 3851da177e4SLinus Torvalds { 3861da177e4SLinus Torvalds struct xfrm_usersa_info *p = NLMSG_DATA(nlh); 3871da177e4SLinus Torvalds struct xfrm_state *x; 3881da177e4SLinus Torvalds int err; 38926b15dadSJamal Hadi Salim struct km_event c; 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds err = verify_newsa_info(p, (struct rtattr **)xfrma); 3921da177e4SLinus Torvalds if (err) 3931da177e4SLinus Torvalds return err; 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds x = xfrm_state_construct(p, (struct rtattr **)xfrma, &err); 3961da177e4SLinus Torvalds if (!x) 3971da177e4SLinus Torvalds return err; 3981da177e4SLinus Torvalds 39926b15dadSJamal Hadi Salim xfrm_state_hold(x); 4001da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 4011da177e4SLinus Torvalds err = xfrm_state_add(x); 4021da177e4SLinus Torvalds else 4031da177e4SLinus Torvalds err = xfrm_state_update(x); 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds if (err < 0) { 4061da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 40721380b81SHerbert Xu __xfrm_state_put(x); 4087d6dfe1fSPatrick McHardy goto out; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds 41126b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 41226b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 413f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 41426b15dadSJamal Hadi Salim 41526b15dadSJamal Hadi Salim km_state_notify(x, &c); 4167d6dfe1fSPatrick McHardy out: 41726b15dadSJamal Hadi Salim xfrm_state_put(x); 4181da177e4SLinus Torvalds return err; 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 4221da177e4SLinus Torvalds { 4231da177e4SLinus Torvalds struct xfrm_state *x; 42426b15dadSJamal Hadi Salim int err; 42526b15dadSJamal Hadi Salim struct km_event c; 4261da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 4291da177e4SLinus Torvalds if (x == NULL) 4301da177e4SLinus Torvalds return -ESRCH; 4311da177e4SLinus Torvalds 4326f68dc37SDavid S. Miller if ((err = security_xfrm_state_delete(x)) != 0) 433c8c05a8eSCatherine Zhang goto out; 434c8c05a8eSCatherine Zhang 4351da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 436c8c05a8eSCatherine Zhang err = -EPERM; 437c8c05a8eSCatherine Zhang goto out; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 44026b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 441c8c05a8eSCatherine Zhang if (err < 0) 442c8c05a8eSCatherine Zhang goto out; 44326b15dadSJamal Hadi Salim 44426b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 44526b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 446f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 44726b15dadSJamal Hadi Salim km_state_notify(x, &c); 4481da177e4SLinus Torvalds 449c8c05a8eSCatherine Zhang out: 450c8c05a8eSCatherine Zhang xfrm_state_put(x); 45126b15dadSJamal Hadi Salim return err; 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 4551da177e4SLinus Torvalds { 4561da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 4571da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 4581da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 4591da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 4601da177e4SLinus Torvalds memcpy(&p->stats, &x->stats, sizeof(p->stats)); 4611da177e4SLinus Torvalds p->saddr = x->props.saddr; 4621da177e4SLinus Torvalds p->mode = x->props.mode; 4631da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 4641da177e4SLinus Torvalds p->reqid = x->props.reqid; 4651da177e4SLinus Torvalds p->family = x->props.family; 4661da177e4SLinus Torvalds p->flags = x->props.flags; 4671da177e4SLinus Torvalds p->seq = x->km.seq; 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds struct xfrm_dump_info { 4711da177e4SLinus Torvalds struct sk_buff *in_skb; 4721da177e4SLinus Torvalds struct sk_buff *out_skb; 4731da177e4SLinus Torvalds u32 nlmsg_seq; 4741da177e4SLinus Torvalds u16 nlmsg_flags; 4751da177e4SLinus Torvalds int start_idx; 4761da177e4SLinus Torvalds int this_idx; 4771da177e4SLinus Torvalds }; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 4801da177e4SLinus Torvalds { 4811da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 4821da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 4831da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 4841da177e4SLinus Torvalds struct xfrm_usersa_info *p; 4851da177e4SLinus Torvalds struct nlmsghdr *nlh; 4861da177e4SLinus Torvalds unsigned char *b = skb->tail; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 4891da177e4SLinus Torvalds goto out; 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 4921da177e4SLinus Torvalds sp->nlmsg_seq, 4931da177e4SLinus Torvalds XFRM_MSG_NEWSA, sizeof(*p)); 4941da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 4971da177e4SLinus Torvalds copy_to_user_state(x, p); 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds if (x->aalg) 5001da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_AUTH, 5011da177e4SLinus Torvalds sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 5021da177e4SLinus Torvalds if (x->ealg) 5031da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_CRYPT, 5041da177e4SLinus Torvalds sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 5051da177e4SLinus Torvalds if (x->calg) 5061da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 5071da177e4SLinus Torvalds 5081da177e4SLinus Torvalds if (x->encap) 5091da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 5101da177e4SLinus Torvalds 511df71837dSTrent Jaeger if (x->security) { 512df71837dSTrent Jaeger int ctx_size = sizeof(struct xfrm_sec_ctx) + 513df71837dSTrent Jaeger x->security->ctx_len; 514df71837dSTrent Jaeger struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); 515df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); 516df71837dSTrent Jaeger 517df71837dSTrent Jaeger uctx->exttype = XFRMA_SEC_CTX; 518df71837dSTrent Jaeger uctx->len = ctx_size; 519df71837dSTrent Jaeger uctx->ctx_doi = x->security->ctx_doi; 520df71837dSTrent Jaeger uctx->ctx_alg = x->security->ctx_alg; 521df71837dSTrent Jaeger uctx->ctx_len = x->security->ctx_len; 522df71837dSTrent Jaeger memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); 523df71837dSTrent Jaeger } 5241da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 5251da177e4SLinus Torvalds out: 5261da177e4SLinus Torvalds sp->this_idx++; 5271da177e4SLinus Torvalds return 0; 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds nlmsg_failure: 5301da177e4SLinus Torvalds rtattr_failure: 5311da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 5321da177e4SLinus Torvalds return -1; 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 5361da177e4SLinus Torvalds { 5371da177e4SLinus Torvalds struct xfrm_dump_info info; 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds info.in_skb = cb->skb; 5401da177e4SLinus Torvalds info.out_skb = skb; 5411da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 5421da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 5431da177e4SLinus Torvalds info.this_idx = 0; 5441da177e4SLinus Torvalds info.start_idx = cb->args[0]; 545*dc00a525SMasahide NAKAMURA (void) xfrm_state_walk(0, dump_one_state, &info); 5461da177e4SLinus Torvalds cb->args[0] = info.this_idx; 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds return skb->len; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 5521da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 5531da177e4SLinus Torvalds { 5541da177e4SLinus Torvalds struct xfrm_dump_info info; 5551da177e4SLinus Torvalds struct sk_buff *skb; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 5581da177e4SLinus Torvalds if (!skb) 5591da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 5621da177e4SLinus Torvalds info.in_skb = in_skb; 5631da177e4SLinus Torvalds info.out_skb = skb; 5641da177e4SLinus Torvalds info.nlmsg_seq = seq; 5651da177e4SLinus Torvalds info.nlmsg_flags = 0; 5661da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds if (dump_one_state(x, 0, &info)) { 5691da177e4SLinus Torvalds kfree_skb(skb); 5701da177e4SLinus Torvalds return NULL; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds return skb; 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 5771da177e4SLinus Torvalds { 5781da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 5791da177e4SLinus Torvalds struct xfrm_state *x; 5801da177e4SLinus Torvalds struct sk_buff *resp_skb; 5811da177e4SLinus Torvalds int err; 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 5841da177e4SLinus Torvalds err = -ESRCH; 5851da177e4SLinus Torvalds if (x == NULL) 5861da177e4SLinus Torvalds goto out_noput; 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 5891da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 5901da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 5911da177e4SLinus Torvalds } else { 5921da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 5931da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds xfrm_state_put(x); 5961da177e4SLinus Torvalds out_noput: 5971da177e4SLinus Torvalds return err; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds static int verify_userspi_info(struct xfrm_userspi_info *p) 6011da177e4SLinus Torvalds { 6021da177e4SLinus Torvalds switch (p->info.id.proto) { 6031da177e4SLinus Torvalds case IPPROTO_AH: 6041da177e4SLinus Torvalds case IPPROTO_ESP: 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds 6071da177e4SLinus Torvalds case IPPROTO_COMP: 6081da177e4SLinus Torvalds /* IPCOMP spi is 16-bits. */ 6091da177e4SLinus Torvalds if (p->max >= 0x10000) 6101da177e4SLinus Torvalds return -EINVAL; 6111da177e4SLinus Torvalds break; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds default: 6141da177e4SLinus Torvalds return -EINVAL; 6151da177e4SLinus Torvalds }; 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds if (p->min > p->max) 6181da177e4SLinus Torvalds return -EINVAL; 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds return 0; 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 6241da177e4SLinus Torvalds { 6251da177e4SLinus Torvalds struct xfrm_state *x; 6261da177e4SLinus Torvalds struct xfrm_userspi_info *p; 6271da177e4SLinus Torvalds struct sk_buff *resp_skb; 6281da177e4SLinus Torvalds xfrm_address_t *daddr; 6291da177e4SLinus Torvalds int family; 6301da177e4SLinus Torvalds int err; 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 6331da177e4SLinus Torvalds err = verify_userspi_info(p); 6341da177e4SLinus Torvalds if (err) 6351da177e4SLinus Torvalds goto out_noput; 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds family = p->info.family; 6381da177e4SLinus Torvalds daddr = &p->info.id.daddr; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds x = NULL; 6411da177e4SLinus Torvalds if (p->info.seq) { 6421da177e4SLinus Torvalds x = xfrm_find_acq_byseq(p->info.seq); 6431da177e4SLinus Torvalds if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { 6441da177e4SLinus Torvalds xfrm_state_put(x); 6451da177e4SLinus Torvalds x = NULL; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds if (!x) 6501da177e4SLinus Torvalds x = xfrm_find_acq(p->info.mode, p->info.reqid, 6511da177e4SLinus Torvalds p->info.id.proto, daddr, 6521da177e4SLinus Torvalds &p->info.saddr, 1, 6531da177e4SLinus Torvalds family); 6541da177e4SLinus Torvalds err = -ENOENT; 6551da177e4SLinus Torvalds if (x == NULL) 6561da177e4SLinus Torvalds goto out_noput; 6571da177e4SLinus Torvalds 6581da177e4SLinus Torvalds resp_skb = ERR_PTR(-ENOENT); 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds spin_lock_bh(&x->lock); 6611da177e4SLinus Torvalds if (x->km.state != XFRM_STATE_DEAD) { 6621da177e4SLinus Torvalds xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); 6631da177e4SLinus Torvalds if (x->id.spi) 6641da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 6691da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 6701da177e4SLinus Torvalds goto out; 6711da177e4SLinus Torvalds } 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 6741da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds out: 6771da177e4SLinus Torvalds xfrm_state_put(x); 6781da177e4SLinus Torvalds out_noput: 6791da177e4SLinus Torvalds return err; 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds static int verify_policy_dir(__u8 dir) 6831da177e4SLinus Torvalds { 6841da177e4SLinus Torvalds switch (dir) { 6851da177e4SLinus Torvalds case XFRM_POLICY_IN: 6861da177e4SLinus Torvalds case XFRM_POLICY_OUT: 6871da177e4SLinus Torvalds case XFRM_POLICY_FWD: 6881da177e4SLinus Torvalds break; 6891da177e4SLinus Torvalds 6901da177e4SLinus Torvalds default: 6911da177e4SLinus Torvalds return -EINVAL; 6921da177e4SLinus Torvalds }; 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds return 0; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) 6981da177e4SLinus Torvalds { 6991da177e4SLinus Torvalds switch (p->share) { 7001da177e4SLinus Torvalds case XFRM_SHARE_ANY: 7011da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 7021da177e4SLinus Torvalds case XFRM_SHARE_USER: 7031da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 7041da177e4SLinus Torvalds break; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds default: 7071da177e4SLinus Torvalds return -EINVAL; 7081da177e4SLinus Torvalds }; 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds switch (p->action) { 7111da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 7121da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 7131da177e4SLinus Torvalds break; 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds default: 7161da177e4SLinus Torvalds return -EINVAL; 7171da177e4SLinus Torvalds }; 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds switch (p->sel.family) { 7201da177e4SLinus Torvalds case AF_INET: 7211da177e4SLinus Torvalds break; 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds case AF_INET6: 7241da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 7251da177e4SLinus Torvalds break; 7261da177e4SLinus Torvalds #else 7271da177e4SLinus Torvalds return -EAFNOSUPPORT; 7281da177e4SLinus Torvalds #endif 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds default: 7311da177e4SLinus Torvalds return -EINVAL; 7321da177e4SLinus Torvalds }; 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds return verify_policy_dir(p->dir); 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 737df71837dSTrent Jaeger static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) 738df71837dSTrent Jaeger { 739df71837dSTrent Jaeger struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; 740df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 741df71837dSTrent Jaeger 742df71837dSTrent Jaeger if (!rt) 743df71837dSTrent Jaeger return 0; 744df71837dSTrent Jaeger 745df71837dSTrent Jaeger uctx = RTA_DATA(rt); 746df71837dSTrent Jaeger return security_xfrm_policy_alloc(pol, uctx); 747df71837dSTrent Jaeger } 748df71837dSTrent Jaeger 7491da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 7501da177e4SLinus Torvalds int nr) 7511da177e4SLinus Torvalds { 7521da177e4SLinus Torvalds int i; 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds xp->xfrm_nr = nr; 7551da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 7561da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 7591da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 7601da177e4SLinus Torvalds sizeof(xfrm_address_t)); 7611da177e4SLinus Torvalds t->reqid = ut->reqid; 7621da177e4SLinus Torvalds t->mode = ut->mode; 7631da177e4SLinus Torvalds t->share = ut->share; 7641da177e4SLinus Torvalds t->optional = ut->optional; 7651da177e4SLinus Torvalds t->aalgos = ut->aalgos; 7661da177e4SLinus Torvalds t->ealgos = ut->ealgos; 7671da177e4SLinus Torvalds t->calgos = ut->calgos; 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds } 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) 7721da177e4SLinus Torvalds { 7731da177e4SLinus Torvalds struct rtattr *rt = xfrma[XFRMA_TMPL-1]; 7741da177e4SLinus Torvalds struct xfrm_user_tmpl *utmpl; 7751da177e4SLinus Torvalds int nr; 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds if (!rt) { 7781da177e4SLinus Torvalds pol->xfrm_nr = 0; 7791da177e4SLinus Torvalds } else { 7801da177e4SLinus Torvalds nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 7831da177e4SLinus Torvalds return -EINVAL; 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds copy_templates(pol, RTA_DATA(rt), nr); 7861da177e4SLinus Torvalds } 7871da177e4SLinus Torvalds return 0; 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 7911da177e4SLinus Torvalds { 7921da177e4SLinus Torvalds xp->priority = p->priority; 7931da177e4SLinus Torvalds xp->index = p->index; 7941da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 7951da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 7961da177e4SLinus Torvalds xp->action = p->action; 7971da177e4SLinus Torvalds xp->flags = p->flags; 7981da177e4SLinus Torvalds xp->family = p->sel.family; 7991da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 8031da177e4SLinus Torvalds { 8041da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 8051da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 8061da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 8071da177e4SLinus Torvalds p->priority = xp->priority; 8081da177e4SLinus Torvalds p->index = xp->index; 8091da177e4SLinus Torvalds p->sel.family = xp->family; 8101da177e4SLinus Torvalds p->dir = dir; 8111da177e4SLinus Torvalds p->action = xp->action; 8121da177e4SLinus Torvalds p->flags = xp->flags; 8131da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 8141da177e4SLinus Torvalds } 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) 8171da177e4SLinus Torvalds { 8181da177e4SLinus Torvalds struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); 8191da177e4SLinus Torvalds int err; 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds if (!xp) { 8221da177e4SLinus Torvalds *errp = -ENOMEM; 8231da177e4SLinus Torvalds return NULL; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds copy_from_user_policy(xp, p); 827df71837dSTrent Jaeger 828df71837dSTrent Jaeger if (!(err = copy_from_user_tmpl(xp, xfrma))) 829df71837dSTrent Jaeger err = copy_from_user_sec_ctx(xp, xfrma); 830df71837dSTrent Jaeger 8311da177e4SLinus Torvalds if (err) { 8321da177e4SLinus Torvalds *errp = err; 8331da177e4SLinus Torvalds kfree(xp); 8341da177e4SLinus Torvalds xp = NULL; 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds return xp; 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 8411da177e4SLinus Torvalds { 8421da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); 8431da177e4SLinus Torvalds struct xfrm_policy *xp; 84426b15dadSJamal Hadi Salim struct km_event c; 8451da177e4SLinus Torvalds int err; 8461da177e4SLinus Torvalds int excl; 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds err = verify_newpolicy_info(p); 8491da177e4SLinus Torvalds if (err) 8501da177e4SLinus Torvalds return err; 851df71837dSTrent Jaeger err = verify_sec_ctx_len((struct rtattr **)xfrma); 852df71837dSTrent Jaeger if (err) 853df71837dSTrent Jaeger return err; 8541da177e4SLinus Torvalds 8551da177e4SLinus Torvalds xp = xfrm_policy_construct(p, (struct rtattr **)xfrma, &err); 8561da177e4SLinus Torvalds if (!xp) 8571da177e4SLinus Torvalds return err; 8581da177e4SLinus Torvalds 85926b15dadSJamal Hadi Salim /* shouldnt excl be based on nlh flags?? 86026b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 86126b15dadSJamal Hadi Salim * in netlink excl is a flag and you wouldnt need 86226b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 8631da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 8641da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 8651da177e4SLinus Torvalds if (err) { 8665f8ac64bSTrent Jaeger security_xfrm_policy_free(xp); 8671da177e4SLinus Torvalds kfree(xp); 8681da177e4SLinus Torvalds return err; 8691da177e4SLinus Torvalds } 8701da177e4SLinus Torvalds 871f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 87226b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 87326b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 87426b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 87526b15dadSJamal Hadi Salim 8761da177e4SLinus Torvalds xfrm_pol_put(xp); 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds return 0; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 8821da177e4SLinus Torvalds { 8831da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 8841da177e4SLinus Torvalds int i; 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 8871da177e4SLinus Torvalds return 0; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 8901da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 8911da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 8921da177e4SLinus Torvalds 8931da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 8941da177e4SLinus Torvalds up->family = xp->family; 8951da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 8961da177e4SLinus Torvalds up->reqid = kp->reqid; 8971da177e4SLinus Torvalds up->mode = kp->mode; 8981da177e4SLinus Torvalds up->share = kp->share; 8991da177e4SLinus Torvalds up->optional = kp->optional; 9001da177e4SLinus Torvalds up->aalgos = kp->aalgos; 9011da177e4SLinus Torvalds up->ealgos = kp->ealgos; 9021da177e4SLinus Torvalds up->calgos = kp->calgos; 9031da177e4SLinus Torvalds } 9041da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_TMPL, 9051da177e4SLinus Torvalds (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), 9061da177e4SLinus Torvalds vec); 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds return 0; 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds rtattr_failure: 9111da177e4SLinus Torvalds return -1; 9121da177e4SLinus Torvalds } 9131da177e4SLinus Torvalds 9140d681623SSerge Hallyn static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) 915df71837dSTrent Jaeger { 9160d681623SSerge Hallyn int ctx_size = sizeof(struct xfrm_sec_ctx) + s->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; 9220d681623SSerge Hallyn uctx->ctx_doi = s->ctx_doi; 9230d681623SSerge Hallyn uctx->ctx_alg = s->ctx_alg; 9240d681623SSerge Hallyn uctx->ctx_len = s->ctx_len; 9250d681623SSerge Hallyn memcpy(uctx + 1, s->ctx_str, s->ctx_len); 926df71837dSTrent Jaeger return 0; 927df71837dSTrent Jaeger 928df71837dSTrent Jaeger rtattr_failure: 929df71837dSTrent Jaeger return -1; 930df71837dSTrent Jaeger } 931df71837dSTrent Jaeger 9320d681623SSerge Hallyn static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) 9330d681623SSerge Hallyn { 9340d681623SSerge Hallyn if (x->security) { 9350d681623SSerge Hallyn return copy_sec_ctx(x->security, skb); 9360d681623SSerge Hallyn } 9370d681623SSerge Hallyn return 0; 9380d681623SSerge Hallyn } 9390d681623SSerge Hallyn 9400d681623SSerge Hallyn static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) 9410d681623SSerge Hallyn { 9420d681623SSerge Hallyn if (xp->security) { 9430d681623SSerge Hallyn return copy_sec_ctx(xp->security, skb); 9440d681623SSerge Hallyn } 9450d681623SSerge Hallyn return 0; 9460d681623SSerge Hallyn } 9470d681623SSerge Hallyn 9481da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 9491da177e4SLinus Torvalds { 9501da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 9511da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 9521da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 9531da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 9541da177e4SLinus Torvalds struct nlmsghdr *nlh; 9551da177e4SLinus Torvalds unsigned char *b = skb->tail; 9561da177e4SLinus Torvalds 9571da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 9581da177e4SLinus Torvalds goto out; 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 9611da177e4SLinus Torvalds sp->nlmsg_seq, 9621da177e4SLinus Torvalds XFRM_MSG_NEWPOLICY, sizeof(*p)); 9631da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 9641da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 9671da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 9681da177e4SLinus Torvalds goto nlmsg_failure; 969df71837dSTrent Jaeger if (copy_to_user_sec_ctx(xp, skb)) 970df71837dSTrent Jaeger goto nlmsg_failure; 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 9731da177e4SLinus Torvalds out: 9741da177e4SLinus Torvalds sp->this_idx++; 9751da177e4SLinus Torvalds return 0; 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds nlmsg_failure: 9781da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 9791da177e4SLinus Torvalds return -1; 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 9831da177e4SLinus Torvalds { 9841da177e4SLinus Torvalds struct xfrm_dump_info info; 9851da177e4SLinus Torvalds 9861da177e4SLinus Torvalds info.in_skb = cb->skb; 9871da177e4SLinus Torvalds info.out_skb = skb; 9881da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 9891da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 9901da177e4SLinus Torvalds info.this_idx = 0; 9911da177e4SLinus Torvalds info.start_idx = cb->args[0]; 9921da177e4SLinus Torvalds (void) xfrm_policy_walk(dump_one_policy, &info); 9931da177e4SLinus Torvalds cb->args[0] = info.this_idx; 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds return skb->len; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 9991da177e4SLinus Torvalds struct xfrm_policy *xp, 10001da177e4SLinus Torvalds int dir, u32 seq) 10011da177e4SLinus Torvalds { 10021da177e4SLinus Torvalds struct xfrm_dump_info info; 10031da177e4SLinus Torvalds struct sk_buff *skb; 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 10061da177e4SLinus Torvalds if (!skb) 10071da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 10101da177e4SLinus Torvalds info.in_skb = in_skb; 10111da177e4SLinus Torvalds info.out_skb = skb; 10121da177e4SLinus Torvalds info.nlmsg_seq = seq; 10131da177e4SLinus Torvalds info.nlmsg_flags = 0; 10141da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds if (dump_one_policy(xp, dir, 0, &info) < 0) { 10171da177e4SLinus Torvalds kfree_skb(skb); 10181da177e4SLinus Torvalds return NULL; 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds return skb; 10221da177e4SLinus Torvalds } 10231da177e4SLinus Torvalds 10241da177e4SLinus Torvalds static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 10251da177e4SLinus Torvalds { 10261da177e4SLinus Torvalds struct xfrm_policy *xp; 10271da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 10281da177e4SLinus Torvalds int err; 102926b15dadSJamal Hadi Salim struct km_event c; 10301da177e4SLinus Torvalds int delete; 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 10331da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds err = verify_policy_dir(p->dir); 10361da177e4SLinus Torvalds if (err) 10371da177e4SLinus Torvalds return err; 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds if (p->index) 10401da177e4SLinus Torvalds xp = xfrm_policy_byid(p->dir, p->index, delete); 1041df71837dSTrent Jaeger else { 1042df71837dSTrent Jaeger struct rtattr **rtattrs = (struct rtattr **)xfrma; 1043df71837dSTrent Jaeger struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; 1044df71837dSTrent Jaeger struct xfrm_policy tmp; 1045df71837dSTrent Jaeger 1046df71837dSTrent Jaeger err = verify_sec_ctx_len(rtattrs); 1047df71837dSTrent Jaeger if (err) 1048df71837dSTrent Jaeger return err; 1049df71837dSTrent Jaeger 1050df71837dSTrent Jaeger memset(&tmp, 0, sizeof(struct xfrm_policy)); 1051df71837dSTrent Jaeger if (rt) { 1052df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); 1053df71837dSTrent Jaeger 1054df71837dSTrent Jaeger if ((err = security_xfrm_policy_alloc(&tmp, uctx))) 1055df71837dSTrent Jaeger return err; 1056df71837dSTrent Jaeger } 1057df71837dSTrent Jaeger xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, delete); 1058df71837dSTrent Jaeger security_xfrm_policy_free(&tmp); 1059df71837dSTrent Jaeger } 10601da177e4SLinus Torvalds if (xp == NULL) 10611da177e4SLinus Torvalds return -ENOENT; 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds if (!delete) { 10641da177e4SLinus Torvalds struct sk_buff *resp_skb; 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 10671da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 10681da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 10691da177e4SLinus Torvalds } else { 10701da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 10711da177e4SLinus Torvalds NETLINK_CB(skb).pid, 10721da177e4SLinus Torvalds MSG_DONTWAIT); 10731da177e4SLinus Torvalds } 107426b15dadSJamal Hadi Salim } else { 10756f68dc37SDavid S. Miller if ((err = security_xfrm_policy_delete(xp)) != 0) 1076c8c05a8eSCatherine Zhang goto out; 1077e7443892SHerbert Xu c.data.byid = p->index; 1078f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 107926b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 108026b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 108126b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds xfrm_pol_put(xp); 10851da177e4SLinus Torvalds 1086c8c05a8eSCatherine Zhang out: 10871da177e4SLinus Torvalds return err; 10881da177e4SLinus Torvalds } 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 10911da177e4SLinus Torvalds { 109226b15dadSJamal Hadi Salim struct km_event c; 10931da177e4SLinus Torvalds struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds xfrm_state_flush(p->proto); 1096bf08867fSHerbert Xu c.data.proto = p->proto; 1097f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 109826b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 109926b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 110026b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 110126b15dadSJamal Hadi Salim 11021da177e4SLinus Torvalds return 0; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 1105d51d081dSJamal Hadi Salim 1106d51d081dSJamal Hadi Salim static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) 1107d51d081dSJamal Hadi Salim { 1108d51d081dSJamal Hadi Salim struct xfrm_aevent_id *id; 1109d51d081dSJamal Hadi Salim struct nlmsghdr *nlh; 1110d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur ltime; 1111d51d081dSJamal Hadi Salim unsigned char *b = skb->tail; 1112d51d081dSJamal Hadi Salim 1113d51d081dSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id)); 1114d51d081dSJamal Hadi Salim id = NLMSG_DATA(nlh); 1115d51d081dSJamal Hadi Salim nlh->nlmsg_flags = 0; 1116d51d081dSJamal Hadi Salim 1117d51d081dSJamal Hadi Salim id->sa_id.daddr = x->id.daddr; 1118d51d081dSJamal Hadi Salim id->sa_id.spi = x->id.spi; 1119d51d081dSJamal Hadi Salim id->sa_id.family = x->props.family; 1120d51d081dSJamal Hadi Salim id->sa_id.proto = x->id.proto; 1121d51d081dSJamal Hadi Salim id->flags = c->data.aevent; 1122d51d081dSJamal Hadi Salim 1123d51d081dSJamal Hadi Salim RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); 1124d51d081dSJamal Hadi Salim 1125d51d081dSJamal Hadi Salim ltime.bytes = x->curlft.bytes; 1126d51d081dSJamal Hadi Salim ltime.packets = x->curlft.packets; 1127d51d081dSJamal Hadi Salim ltime.add_time = x->curlft.add_time; 1128d51d081dSJamal Hadi Salim ltime.use_time = x->curlft.use_time; 1129d51d081dSJamal Hadi Salim 1130d51d081dSJamal Hadi Salim RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); 1131d51d081dSJamal Hadi Salim 1132d51d081dSJamal Hadi Salim if (id->flags&XFRM_AE_RTHR) { 1133d51d081dSJamal Hadi Salim RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); 1134d51d081dSJamal Hadi Salim } 1135d51d081dSJamal Hadi Salim 1136d51d081dSJamal Hadi Salim if (id->flags&XFRM_AE_ETHR) { 1137d51d081dSJamal Hadi Salim u32 etimer = x->replay_maxage*10/HZ; 1138d51d081dSJamal Hadi Salim RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); 1139d51d081dSJamal Hadi Salim } 1140d51d081dSJamal Hadi Salim 1141d51d081dSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 1142d51d081dSJamal Hadi Salim return skb->len; 1143d51d081dSJamal Hadi Salim 1144d51d081dSJamal Hadi Salim rtattr_failure: 1145d51d081dSJamal Hadi Salim nlmsg_failure: 1146d51d081dSJamal Hadi Salim skb_trim(skb, b - skb->data); 1147d51d081dSJamal Hadi Salim return -1; 1148d51d081dSJamal Hadi Salim } 1149d51d081dSJamal Hadi Salim 1150d51d081dSJamal Hadi Salim static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 1151d51d081dSJamal Hadi Salim { 1152d51d081dSJamal Hadi Salim struct xfrm_state *x; 1153d51d081dSJamal Hadi Salim struct sk_buff *r_skb; 1154d51d081dSJamal Hadi Salim int err; 1155d51d081dSJamal Hadi Salim struct km_event c; 1156d51d081dSJamal Hadi Salim struct xfrm_aevent_id *p = NLMSG_DATA(nlh); 1157d51d081dSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); 1158d51d081dSJamal Hadi Salim struct xfrm_usersa_id *id = &p->sa_id; 1159d51d081dSJamal Hadi Salim 1160d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_replay_state)); 1161d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); 1162d51d081dSJamal Hadi Salim 1163d51d081dSJamal Hadi Salim if (p->flags&XFRM_AE_RTHR) 1164d51d081dSJamal Hadi Salim len+=RTA_SPACE(sizeof(u32)); 1165d51d081dSJamal Hadi Salim 1166d51d081dSJamal Hadi Salim if (p->flags&XFRM_AE_ETHR) 1167d51d081dSJamal Hadi Salim len+=RTA_SPACE(sizeof(u32)); 1168d51d081dSJamal Hadi Salim 1169d51d081dSJamal Hadi Salim r_skb = alloc_skb(len, GFP_ATOMIC); 1170d51d081dSJamal Hadi Salim if (r_skb == NULL) 1171d51d081dSJamal Hadi Salim return -ENOMEM; 1172d51d081dSJamal Hadi Salim 1173d51d081dSJamal Hadi Salim x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); 1174d51d081dSJamal Hadi Salim if (x == NULL) { 1175d51d081dSJamal Hadi Salim kfree(r_skb); 1176d51d081dSJamal Hadi Salim return -ESRCH; 1177d51d081dSJamal Hadi Salim } 1178d51d081dSJamal Hadi Salim 1179d51d081dSJamal Hadi Salim /* 1180d51d081dSJamal Hadi Salim * XXX: is this lock really needed - none of the other 1181d51d081dSJamal Hadi Salim * gets lock (the concern is things getting updated 1182d51d081dSJamal Hadi Salim * while we are still reading) - jhs 1183d51d081dSJamal Hadi Salim */ 1184d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 1185d51d081dSJamal Hadi Salim c.data.aevent = p->flags; 1186d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 1187d51d081dSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 1188d51d081dSJamal Hadi Salim 1189d51d081dSJamal Hadi Salim if (build_aevent(r_skb, x, &c) < 0) 1190d51d081dSJamal Hadi Salim BUG(); 1191d51d081dSJamal Hadi Salim err = netlink_unicast(xfrm_nl, r_skb, 1192d51d081dSJamal Hadi Salim NETLINK_CB(skb).pid, MSG_DONTWAIT); 1193d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 1194d51d081dSJamal Hadi Salim xfrm_state_put(x); 1195d51d081dSJamal Hadi Salim return err; 1196d51d081dSJamal Hadi Salim } 1197d51d081dSJamal Hadi Salim 1198d51d081dSJamal Hadi Salim static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 1199d51d081dSJamal Hadi Salim { 1200d51d081dSJamal Hadi Salim struct xfrm_state *x; 1201d51d081dSJamal Hadi Salim struct km_event c; 1202d51d081dSJamal Hadi Salim int err = - EINVAL; 1203d51d081dSJamal Hadi Salim struct xfrm_aevent_id *p = NLMSG_DATA(nlh); 1204d51d081dSJamal Hadi Salim struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; 1205d51d081dSJamal Hadi Salim struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; 1206d51d081dSJamal Hadi Salim 1207d51d081dSJamal Hadi Salim if (!lt && !rp) 1208d51d081dSJamal Hadi Salim return err; 1209d51d081dSJamal Hadi Salim 1210d51d081dSJamal Hadi Salim /* pedantic mode - thou shalt sayeth replaceth */ 1211d51d081dSJamal Hadi Salim if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) 1212d51d081dSJamal Hadi Salim return err; 1213d51d081dSJamal Hadi Salim 1214d51d081dSJamal Hadi Salim x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); 1215d51d081dSJamal Hadi Salim if (x == NULL) 1216d51d081dSJamal Hadi Salim return -ESRCH; 1217d51d081dSJamal Hadi Salim 1218d51d081dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 1219d51d081dSJamal Hadi Salim goto out; 1220d51d081dSJamal Hadi Salim 1221d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 1222d51d081dSJamal Hadi Salim err = xfrm_update_ae_params(x,(struct rtattr **)xfrma); 1223d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 1224d51d081dSJamal Hadi Salim if (err < 0) 1225d51d081dSJamal Hadi Salim goto out; 1226d51d081dSJamal Hadi Salim 1227d51d081dSJamal Hadi Salim c.event = nlh->nlmsg_type; 1228d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 1229d51d081dSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 1230d51d081dSJamal Hadi Salim c.data.aevent = XFRM_AE_CU; 1231d51d081dSJamal Hadi Salim km_state_notify(x, &c); 1232d51d081dSJamal Hadi Salim err = 0; 1233d51d081dSJamal Hadi Salim out: 1234d51d081dSJamal Hadi Salim xfrm_state_put(x); 1235d51d081dSJamal Hadi Salim return err; 1236d51d081dSJamal Hadi Salim } 1237d51d081dSJamal Hadi Salim 12381da177e4SLinus Torvalds static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 12391da177e4SLinus Torvalds { 124026b15dadSJamal Hadi Salim struct km_event c; 124126b15dadSJamal Hadi Salim 12421da177e4SLinus Torvalds xfrm_policy_flush(); 1243f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 124426b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 124526b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 124626b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 12471da177e4SLinus Torvalds return 0; 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 12506c5c8ca7SJamal Hadi Salim static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 12516c5c8ca7SJamal Hadi Salim { 12526c5c8ca7SJamal Hadi Salim struct xfrm_policy *xp; 12536c5c8ca7SJamal Hadi Salim struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); 12546c5c8ca7SJamal Hadi Salim struct xfrm_userpolicy_info *p = &up->pol; 12556c5c8ca7SJamal Hadi Salim int err = -ENOENT; 12566c5c8ca7SJamal Hadi Salim 12576c5c8ca7SJamal Hadi Salim if (p->index) 12586c5c8ca7SJamal Hadi Salim xp = xfrm_policy_byid(p->dir, p->index, 0); 12596c5c8ca7SJamal Hadi Salim else { 12606c5c8ca7SJamal Hadi Salim struct rtattr **rtattrs = (struct rtattr **)xfrma; 12616c5c8ca7SJamal Hadi Salim struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1]; 12626c5c8ca7SJamal Hadi Salim struct xfrm_policy tmp; 12636c5c8ca7SJamal Hadi Salim 12646c5c8ca7SJamal Hadi Salim err = verify_sec_ctx_len(rtattrs); 12656c5c8ca7SJamal Hadi Salim if (err) 12666c5c8ca7SJamal Hadi Salim return err; 12676c5c8ca7SJamal Hadi Salim 12686c5c8ca7SJamal Hadi Salim memset(&tmp, 0, sizeof(struct xfrm_policy)); 12696c5c8ca7SJamal Hadi Salim if (rt) { 12706c5c8ca7SJamal Hadi Salim struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); 12716c5c8ca7SJamal Hadi Salim 12726c5c8ca7SJamal Hadi Salim if ((err = security_xfrm_policy_alloc(&tmp, uctx))) 12736c5c8ca7SJamal Hadi Salim return err; 12746c5c8ca7SJamal Hadi Salim } 12756c5c8ca7SJamal Hadi Salim xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, 0); 12766c5c8ca7SJamal Hadi Salim security_xfrm_policy_free(&tmp); 12776c5c8ca7SJamal Hadi Salim } 12786c5c8ca7SJamal Hadi Salim 12796c5c8ca7SJamal Hadi Salim if (xp == NULL) 12806c5c8ca7SJamal Hadi Salim return err; 12816c5c8ca7SJamal Hadi Salim read_lock(&xp->lock); 12826c5c8ca7SJamal Hadi Salim if (xp->dead) { 12836c5c8ca7SJamal Hadi Salim read_unlock(&xp->lock); 12846c5c8ca7SJamal Hadi Salim goto out; 12856c5c8ca7SJamal Hadi Salim } 12866c5c8ca7SJamal Hadi Salim 12876c5c8ca7SJamal Hadi Salim read_unlock(&xp->lock); 12886c5c8ca7SJamal Hadi Salim err = 0; 12896c5c8ca7SJamal Hadi Salim if (up->hard) { 12906c5c8ca7SJamal Hadi Salim xfrm_policy_delete(xp, p->dir); 12916c5c8ca7SJamal Hadi Salim } else { 12926c5c8ca7SJamal Hadi Salim // reset the timers here? 12936c5c8ca7SJamal Hadi Salim printk("Dont know what to do with soft policy expire\n"); 12946c5c8ca7SJamal Hadi Salim } 12956c5c8ca7SJamal Hadi Salim km_policy_expired(xp, p->dir, up->hard, current->pid); 12966c5c8ca7SJamal Hadi Salim 12976c5c8ca7SJamal Hadi Salim out: 12986c5c8ca7SJamal Hadi Salim xfrm_pol_put(xp); 12996c5c8ca7SJamal Hadi Salim return err; 13006c5c8ca7SJamal Hadi Salim } 13016c5c8ca7SJamal Hadi Salim 130253bc6b4dSJamal Hadi Salim static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 130353bc6b4dSJamal Hadi Salim { 130453bc6b4dSJamal Hadi Salim struct xfrm_state *x; 130553bc6b4dSJamal Hadi Salim int err; 130653bc6b4dSJamal Hadi Salim struct xfrm_user_expire *ue = NLMSG_DATA(nlh); 130753bc6b4dSJamal Hadi Salim struct xfrm_usersa_info *p = &ue->state; 130853bc6b4dSJamal Hadi Salim 130953bc6b4dSJamal Hadi Salim x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); 131053bc6b4dSJamal Hadi Salim err = -ENOENT; 131153bc6b4dSJamal Hadi Salim 131253bc6b4dSJamal Hadi Salim if (x == NULL) 131353bc6b4dSJamal Hadi Salim return err; 131453bc6b4dSJamal Hadi Salim 131553bc6b4dSJamal Hadi Salim err = -EINVAL; 131653bc6b4dSJamal Hadi Salim 131753bc6b4dSJamal Hadi Salim spin_lock_bh(&x->lock); 131853bc6b4dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 131953bc6b4dSJamal Hadi Salim goto out; 132053bc6b4dSJamal Hadi Salim km_state_expired(x, ue->hard, current->pid); 132153bc6b4dSJamal Hadi Salim 132253bc6b4dSJamal Hadi Salim if (ue->hard) 132353bc6b4dSJamal Hadi Salim __xfrm_state_delete(x); 132453bc6b4dSJamal Hadi Salim out: 132553bc6b4dSJamal Hadi Salim spin_unlock_bh(&x->lock); 132653bc6b4dSJamal Hadi Salim xfrm_state_put(x); 132753bc6b4dSJamal Hadi Salim return err; 132853bc6b4dSJamal Hadi Salim } 132953bc6b4dSJamal Hadi Salim 1330980ebd25SJamal Hadi Salim static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 1331980ebd25SJamal Hadi Salim { 1332980ebd25SJamal Hadi Salim struct xfrm_policy *xp; 1333980ebd25SJamal Hadi Salim struct xfrm_user_tmpl *ut; 1334980ebd25SJamal Hadi Salim int i; 1335980ebd25SJamal Hadi Salim struct rtattr *rt = xfrma[XFRMA_TMPL-1]; 1336980ebd25SJamal Hadi Salim 1337980ebd25SJamal Hadi Salim struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); 1338980ebd25SJamal Hadi Salim struct xfrm_state *x = xfrm_state_alloc(); 1339980ebd25SJamal Hadi Salim int err = -ENOMEM; 1340980ebd25SJamal Hadi Salim 1341980ebd25SJamal Hadi Salim if (!x) 1342980ebd25SJamal Hadi Salim return err; 1343980ebd25SJamal Hadi Salim 1344980ebd25SJamal Hadi Salim err = verify_newpolicy_info(&ua->policy); 1345980ebd25SJamal Hadi Salim if (err) { 1346980ebd25SJamal Hadi Salim printk("BAD policy passed\n"); 1347980ebd25SJamal Hadi Salim kfree(x); 1348980ebd25SJamal Hadi Salim return err; 1349980ebd25SJamal Hadi Salim } 1350980ebd25SJamal Hadi Salim 1351980ebd25SJamal Hadi Salim /* build an XP */ 1352980ebd25SJamal Hadi Salim xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); if (!xp) { 1353980ebd25SJamal Hadi Salim kfree(x); 1354980ebd25SJamal Hadi Salim return err; 1355980ebd25SJamal Hadi Salim } 1356980ebd25SJamal Hadi Salim 1357980ebd25SJamal Hadi Salim memcpy(&x->id, &ua->id, sizeof(ua->id)); 1358980ebd25SJamal Hadi Salim memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); 1359980ebd25SJamal Hadi Salim memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); 1360980ebd25SJamal Hadi Salim 1361980ebd25SJamal Hadi Salim ut = RTA_DATA(rt); 1362980ebd25SJamal Hadi Salim /* extract the templates and for each call km_key */ 1363980ebd25SJamal Hadi Salim for (i = 0; i < xp->xfrm_nr; i++, ut++) { 1364980ebd25SJamal Hadi Salim struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 1365980ebd25SJamal Hadi Salim memcpy(&x->id, &t->id, sizeof(x->id)); 1366980ebd25SJamal Hadi Salim x->props.mode = t->mode; 1367980ebd25SJamal Hadi Salim x->props.reqid = t->reqid; 1368980ebd25SJamal Hadi Salim x->props.family = ut->family; 1369980ebd25SJamal Hadi Salim t->aalgos = ua->aalgos; 1370980ebd25SJamal Hadi Salim t->ealgos = ua->ealgos; 1371980ebd25SJamal Hadi Salim t->calgos = ua->calgos; 1372980ebd25SJamal Hadi Salim err = km_query(x, t, xp); 1373980ebd25SJamal Hadi Salim 1374980ebd25SJamal Hadi Salim } 1375980ebd25SJamal Hadi Salim 1376980ebd25SJamal Hadi Salim kfree(x); 1377980ebd25SJamal Hadi Salim kfree(xp); 1378980ebd25SJamal Hadi Salim 1379980ebd25SJamal Hadi Salim return 0; 1380980ebd25SJamal Hadi Salim } 1381980ebd25SJamal Hadi Salim 1382d51d081dSJamal Hadi Salim 1383492b558bSThomas Graf #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) 1384492b558bSThomas Graf 1385492b558bSThomas Graf static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 1386492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 1387492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 1388492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 1389492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 1390492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 1391492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 1392492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 1393980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 139453bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 1395492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 1396492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 13976c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 1398492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 1399492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), 1400d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 1401d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 14021da177e4SLinus Torvalds }; 14031da177e4SLinus Torvalds 1404492b558bSThomas Graf #undef XMSGSIZE 1405492b558bSThomas Graf 14061da177e4SLinus Torvalds static struct xfrm_link { 14071da177e4SLinus Torvalds int (*doit)(struct sk_buff *, struct nlmsghdr *, void **); 14081da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 1409492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 1410492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 1411492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 1412492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 1413492b558bSThomas Graf .dump = xfrm_dump_sa }, 1414492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 1415492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 1416492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 1417492b558bSThomas Graf .dump = xfrm_dump_policy }, 1418492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 1419980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, 142053bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, 1421492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 1422492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 14236c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, 1424492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 1425492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 1426d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, 1427d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, 14281da177e4SLinus Torvalds }; 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) 14311da177e4SLinus Torvalds { 14321da177e4SLinus Torvalds struct rtattr *xfrma[XFRMA_MAX]; 14331da177e4SLinus Torvalds struct xfrm_link *link; 14341da177e4SLinus Torvalds int type, min_len; 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) 14371da177e4SLinus Torvalds return 0; 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds type = nlh->nlmsg_type; 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds /* A control message: ignore them */ 14421da177e4SLinus Torvalds if (type < XFRM_MSG_BASE) 14431da177e4SLinus Torvalds return 0; 14441da177e4SLinus Torvalds 14451da177e4SLinus Torvalds /* Unknown message: reply with EINVAL */ 14461da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 14471da177e4SLinus Torvalds goto err_einval; 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 14501da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds /* All operations require privileges, even GET */ 1453c7bdb545SDarrel Goeddel if (security_netlink_recv(skb, CAP_NET_ADMIN)) { 14541da177e4SLinus Torvalds *errp = -EPERM; 14551da177e4SLinus Torvalds return -1; 14561da177e4SLinus Torvalds } 14571da177e4SLinus Torvalds 1458492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 1459492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 1460492b558bSThomas Graf (nlh->nlmsg_flags & NLM_F_DUMP)) { 14611da177e4SLinus Torvalds if (link->dump == NULL) 14621da177e4SLinus Torvalds goto err_einval; 14631da177e4SLinus Torvalds 14641da177e4SLinus Torvalds if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh, 1465a8f74b22SThomas Graf link->dump, NULL)) != 0) { 14661da177e4SLinus Torvalds return -1; 14671da177e4SLinus Torvalds } 146888fc2c84SThomas Graf 146988fc2c84SThomas Graf netlink_queue_skip(nlh, skb); 14701da177e4SLinus Torvalds return -1; 14711da177e4SLinus Torvalds } 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds memset(xfrma, 0, sizeof(xfrma)); 14741da177e4SLinus Torvalds 14751da177e4SLinus Torvalds if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) 14761da177e4SLinus Torvalds goto err_einval; 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds if (nlh->nlmsg_len > min_len) { 14791da177e4SLinus Torvalds int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 14801da177e4SLinus Torvalds struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); 14811da177e4SLinus Torvalds 14821da177e4SLinus Torvalds while (RTA_OK(attr, attrlen)) { 14831da177e4SLinus Torvalds unsigned short flavor = attr->rta_type; 14841da177e4SLinus Torvalds if (flavor) { 14851da177e4SLinus Torvalds if (flavor > XFRMA_MAX) 14861da177e4SLinus Torvalds goto err_einval; 14871da177e4SLinus Torvalds xfrma[flavor - 1] = attr; 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds attr = RTA_NEXT(attr, attrlen); 14901da177e4SLinus Torvalds } 14911da177e4SLinus Torvalds } 14921da177e4SLinus Torvalds 14931da177e4SLinus Torvalds if (link->doit == NULL) 14941da177e4SLinus Torvalds goto err_einval; 14951da177e4SLinus Torvalds *errp = link->doit(skb, nlh, (void **) &xfrma); 14961da177e4SLinus Torvalds 14971da177e4SLinus Torvalds return *errp; 14981da177e4SLinus Torvalds 14991da177e4SLinus Torvalds err_einval: 15001da177e4SLinus Torvalds *errp = -EINVAL; 15011da177e4SLinus Torvalds return -1; 15021da177e4SLinus Torvalds } 15031da177e4SLinus Torvalds 15041da177e4SLinus Torvalds static void xfrm_netlink_rcv(struct sock *sk, int len) 15051da177e4SLinus Torvalds { 150688fc2c84SThomas Graf unsigned int qlen = 0; 15072a0a6ebeSHerbert Xu 15081da177e4SLinus Torvalds do { 15094a3e2f71SArjan van de Ven mutex_lock(&xfrm_cfg_mutex); 151088fc2c84SThomas Graf netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); 15114a3e2f71SArjan van de Ven mutex_unlock(&xfrm_cfg_mutex); 15121da177e4SLinus Torvalds 15132a0a6ebeSHerbert Xu } while (qlen); 15141da177e4SLinus Torvalds } 15151da177e4SLinus Torvalds 1516d51d081dSJamal Hadi Salim static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) 15171da177e4SLinus Torvalds { 15181da177e4SLinus Torvalds struct xfrm_user_expire *ue; 15191da177e4SLinus Torvalds struct nlmsghdr *nlh; 15201da177e4SLinus Torvalds unsigned char *b = skb->tail; 15211da177e4SLinus Torvalds 1522d51d081dSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE, 15231da177e4SLinus Torvalds sizeof(*ue)); 15241da177e4SLinus Torvalds ue = NLMSG_DATA(nlh); 15251da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 1528d51d081dSJamal Hadi Salim ue->hard = (c->data.hard != 0) ? 1 : 0; 15291da177e4SLinus Torvalds 15301da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 15311da177e4SLinus Torvalds return skb->len; 15321da177e4SLinus Torvalds 15331da177e4SLinus Torvalds nlmsg_failure: 15341da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 15351da177e4SLinus Torvalds return -1; 15361da177e4SLinus Torvalds } 15371da177e4SLinus Torvalds 153826b15dadSJamal Hadi Salim static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) 15391da177e4SLinus Torvalds { 15401da177e4SLinus Torvalds struct sk_buff *skb; 1541ee57eef9SJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); 15421da177e4SLinus Torvalds 1543ee57eef9SJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 15441da177e4SLinus Torvalds if (skb == NULL) 15451da177e4SLinus Torvalds return -ENOMEM; 15461da177e4SLinus Torvalds 1547d51d081dSJamal Hadi Salim if (build_expire(skb, x, c) < 0) 15481da177e4SLinus Torvalds BUG(); 15491da177e4SLinus Torvalds 1550ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; 1551ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); 15521da177e4SLinus Torvalds } 15531da177e4SLinus Torvalds 1554d51d081dSJamal Hadi Salim static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) 1555d51d081dSJamal Hadi Salim { 1556d51d081dSJamal Hadi Salim struct sk_buff *skb; 1557d51d081dSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); 1558d51d081dSJamal Hadi Salim 1559d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_replay_state)); 1560d51d081dSJamal Hadi Salim len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); 1561d51d081dSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 1562d51d081dSJamal Hadi Salim if (skb == NULL) 1563d51d081dSJamal Hadi Salim return -ENOMEM; 1564d51d081dSJamal Hadi Salim 1565d51d081dSJamal Hadi Salim if (build_aevent(skb, x, c) < 0) 1566d51d081dSJamal Hadi Salim BUG(); 1567d51d081dSJamal Hadi Salim 1568d51d081dSJamal Hadi Salim NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; 1569d51d081dSJamal Hadi Salim return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); 1570d51d081dSJamal Hadi Salim } 1571d51d081dSJamal Hadi Salim 157226b15dadSJamal Hadi Salim static int xfrm_notify_sa_flush(struct km_event *c) 157326b15dadSJamal Hadi Salim { 157426b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 157526b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 157626b15dadSJamal Hadi Salim struct sk_buff *skb; 157726b15dadSJamal Hadi Salim unsigned char *b; 157826b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); 157926b15dadSJamal Hadi Salim 158026b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 158126b15dadSJamal Hadi Salim if (skb == NULL) 158226b15dadSJamal Hadi Salim return -ENOMEM; 158326b15dadSJamal Hadi Salim b = skb->tail; 158426b15dadSJamal Hadi Salim 158526b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, 158626b15dadSJamal Hadi Salim XFRM_MSG_FLUSHSA, sizeof(*p)); 158726b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 158826b15dadSJamal Hadi Salim 158926b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 1590bf08867fSHerbert Xu p->proto = c->data.proto; 159126b15dadSJamal Hadi Salim 159226b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 159326b15dadSJamal Hadi Salim 1594ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; 1595ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); 159626b15dadSJamal Hadi Salim 159726b15dadSJamal Hadi Salim nlmsg_failure: 159826b15dadSJamal Hadi Salim kfree_skb(skb); 159926b15dadSJamal Hadi Salim return -1; 160026b15dadSJamal Hadi Salim } 160126b15dadSJamal Hadi Salim 160226b15dadSJamal Hadi Salim static int inline xfrm_sa_len(struct xfrm_state *x) 160326b15dadSJamal Hadi Salim { 16040603eac0SHerbert Xu int l = 0; 160526b15dadSJamal Hadi Salim if (x->aalg) 160626b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); 160726b15dadSJamal Hadi Salim if (x->ealg) 160826b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); 160926b15dadSJamal Hadi Salim if (x->calg) 161026b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->calg)); 161126b15dadSJamal Hadi Salim if (x->encap) 161226b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->encap)); 161326b15dadSJamal Hadi Salim 161426b15dadSJamal Hadi Salim return l; 161526b15dadSJamal Hadi Salim } 161626b15dadSJamal Hadi Salim 161726b15dadSJamal Hadi Salim static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) 161826b15dadSJamal Hadi Salim { 161926b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 16200603eac0SHerbert Xu struct xfrm_usersa_id *id; 162126b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 162226b15dadSJamal Hadi Salim struct sk_buff *skb; 162326b15dadSJamal Hadi Salim unsigned char *b; 162426b15dadSJamal Hadi Salim int len = xfrm_sa_len(x); 16250603eac0SHerbert Xu int headlen; 16260603eac0SHerbert Xu 16270603eac0SHerbert Xu headlen = sizeof(*p); 16280603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 16290603eac0SHerbert Xu len += RTA_SPACE(headlen); 16300603eac0SHerbert Xu headlen = sizeof(*id); 16310603eac0SHerbert Xu } 16320603eac0SHerbert Xu len += NLMSG_SPACE(headlen); 163326b15dadSJamal Hadi Salim 163426b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 163526b15dadSJamal Hadi Salim if (skb == NULL) 163626b15dadSJamal Hadi Salim return -ENOMEM; 163726b15dadSJamal Hadi Salim b = skb->tail; 163826b15dadSJamal Hadi Salim 16390603eac0SHerbert Xu nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); 164026b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 164126b15dadSJamal Hadi Salim 164226b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 16430603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 16440603eac0SHerbert Xu id = NLMSG_DATA(nlh); 16450603eac0SHerbert Xu memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); 16460603eac0SHerbert Xu id->spi = x->id.spi; 16470603eac0SHerbert Xu id->family = x->props.family; 16480603eac0SHerbert Xu id->proto = x->id.proto; 16490603eac0SHerbert Xu 16500603eac0SHerbert Xu p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); 16510603eac0SHerbert Xu } 16520603eac0SHerbert Xu 165326b15dadSJamal Hadi Salim copy_to_user_state(x, p); 165426b15dadSJamal Hadi Salim 165526b15dadSJamal Hadi Salim if (x->aalg) 165626b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_AUTH, 165726b15dadSJamal Hadi Salim sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 165826b15dadSJamal Hadi Salim if (x->ealg) 165926b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_CRYPT, 166026b15dadSJamal Hadi Salim sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 166126b15dadSJamal Hadi Salim if (x->calg) 166226b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 166326b15dadSJamal Hadi Salim 166426b15dadSJamal Hadi Salim if (x->encap) 166526b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 166626b15dadSJamal Hadi Salim 166726b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 166826b15dadSJamal Hadi Salim 1669ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; 1670ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); 167126b15dadSJamal Hadi Salim 167226b15dadSJamal Hadi Salim nlmsg_failure: 167326b15dadSJamal Hadi Salim rtattr_failure: 167426b15dadSJamal Hadi Salim kfree_skb(skb); 167526b15dadSJamal Hadi Salim return -1; 167626b15dadSJamal Hadi Salim } 167726b15dadSJamal Hadi Salim 167826b15dadSJamal Hadi Salim static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) 167926b15dadSJamal Hadi Salim { 168026b15dadSJamal Hadi Salim 168126b15dadSJamal Hadi Salim switch (c->event) { 1682f60f6b8fSHerbert Xu case XFRM_MSG_EXPIRE: 168326b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 1684d51d081dSJamal Hadi Salim case XFRM_MSG_NEWAE: 1685d51d081dSJamal Hadi Salim return xfrm_aevent_state_notify(x, c); 1686f60f6b8fSHerbert Xu case XFRM_MSG_DELSA: 1687f60f6b8fSHerbert Xu case XFRM_MSG_UPDSA: 1688f60f6b8fSHerbert Xu case XFRM_MSG_NEWSA: 168926b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 1690f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHSA: 169126b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 169226b15dadSJamal Hadi Salim default: 169326b15dadSJamal Hadi Salim printk("xfrm_user: Unknown SA event %d\n", c->event); 169426b15dadSJamal Hadi Salim break; 169526b15dadSJamal Hadi Salim } 169626b15dadSJamal Hadi Salim 169726b15dadSJamal Hadi Salim return 0; 169826b15dadSJamal Hadi Salim 169926b15dadSJamal Hadi Salim } 170026b15dadSJamal Hadi Salim 17011da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 17021da177e4SLinus Torvalds struct xfrm_tmpl *xt, struct xfrm_policy *xp, 17031da177e4SLinus Torvalds int dir) 17041da177e4SLinus Torvalds { 17051da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 17061da177e4SLinus Torvalds struct nlmsghdr *nlh; 17071da177e4SLinus Torvalds unsigned char *b = skb->tail; 17081da177e4SLinus Torvalds __u32 seq = xfrm_get_acqseq(); 17091da177e4SLinus Torvalds 17101da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, 17111da177e4SLinus Torvalds sizeof(*ua)); 17121da177e4SLinus Torvalds ua = NLMSG_DATA(nlh); 17131da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 17141da177e4SLinus Torvalds 17151da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 17161da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 17171da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 17181da177e4SLinus Torvalds copy_to_user_policy(xp, &ua->policy, dir); 17191da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 17201da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 17211da177e4SLinus Torvalds ua->calgos = xt->calgos; 17221da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 17231da177e4SLinus Torvalds 17241da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 17251da177e4SLinus Torvalds goto nlmsg_failure; 17260d681623SSerge Hallyn if (copy_to_user_state_sec_ctx(x, skb)) 1727df71837dSTrent Jaeger goto nlmsg_failure; 17281da177e4SLinus Torvalds 17291da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 17301da177e4SLinus Torvalds return skb->len; 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds nlmsg_failure: 17331da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 17341da177e4SLinus Torvalds return -1; 17351da177e4SLinus Torvalds } 17361da177e4SLinus Torvalds 17371da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 17381da177e4SLinus Torvalds struct xfrm_policy *xp, int dir) 17391da177e4SLinus Torvalds { 17401da177e4SLinus Torvalds struct sk_buff *skb; 17411da177e4SLinus Torvalds size_t len; 17421da177e4SLinus Torvalds 17431da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 17441da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); 1745df71837dSTrent Jaeger len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); 17461da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 17471da177e4SLinus Torvalds if (skb == NULL) 17481da177e4SLinus Torvalds return -ENOMEM; 17491da177e4SLinus Torvalds 17501da177e4SLinus Torvalds if (build_acquire(skb, x, xt, xp, dir) < 0) 17511da177e4SLinus Torvalds BUG(); 17521da177e4SLinus Torvalds 1753ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; 1754ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); 17551da177e4SLinus Torvalds } 17561da177e4SLinus Torvalds 17571da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 17581da177e4SLinus Torvalds * or more templates. 17591da177e4SLinus Torvalds */ 1760cb969f07SVenkat Yekkirala static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, 17611da177e4SLinus Torvalds u8 *data, int len, int *dir) 17621da177e4SLinus Torvalds { 17631da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 17641da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 17651da177e4SLinus Torvalds struct xfrm_policy *xp; 17661da177e4SLinus Torvalds int nr; 17671da177e4SLinus Torvalds 1768cb969f07SVenkat Yekkirala switch (sk->sk_family) { 17691da177e4SLinus Torvalds case AF_INET: 17701da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 17711da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 17721da177e4SLinus Torvalds return NULL; 17731da177e4SLinus Torvalds } 17741da177e4SLinus Torvalds break; 17751da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 17761da177e4SLinus Torvalds case AF_INET6: 17771da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 17781da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 17791da177e4SLinus Torvalds return NULL; 17801da177e4SLinus Torvalds } 17811da177e4SLinus Torvalds break; 17821da177e4SLinus Torvalds #endif 17831da177e4SLinus Torvalds default: 17841da177e4SLinus Torvalds *dir = -EINVAL; 17851da177e4SLinus Torvalds return NULL; 17861da177e4SLinus Torvalds } 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds *dir = -EINVAL; 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds if (len < sizeof(*p) || 17911da177e4SLinus Torvalds verify_newpolicy_info(p)) 17921da177e4SLinus Torvalds return NULL; 17931da177e4SLinus Torvalds 17941da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 17951da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 17961da177e4SLinus Torvalds return NULL; 17971da177e4SLinus Torvalds 1798a4f1bac6SHerbert Xu if (p->dir > XFRM_POLICY_OUT) 1799a4f1bac6SHerbert Xu return NULL; 1800a4f1bac6SHerbert Xu 18011da177e4SLinus Torvalds xp = xfrm_policy_alloc(GFP_KERNEL); 18021da177e4SLinus Torvalds if (xp == NULL) { 18031da177e4SLinus Torvalds *dir = -ENOBUFS; 18041da177e4SLinus Torvalds return NULL; 18051da177e4SLinus Torvalds } 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds copy_from_user_policy(xp, p); 18081da177e4SLinus Torvalds copy_templates(xp, ut, nr); 18091da177e4SLinus Torvalds 1810cb969f07SVenkat Yekkirala if (!xp->security) { 1811cb969f07SVenkat Yekkirala int err = security_xfrm_sock_policy_alloc(xp, sk); 1812cb969f07SVenkat Yekkirala if (err) { 1813cb969f07SVenkat Yekkirala kfree(xp); 1814cb969f07SVenkat Yekkirala *dir = err; 1815cb969f07SVenkat Yekkirala return NULL; 1816cb969f07SVenkat Yekkirala } 1817cb969f07SVenkat Yekkirala } 1818cb969f07SVenkat Yekkirala 18191da177e4SLinus Torvalds *dir = p->dir; 18201da177e4SLinus Torvalds 18211da177e4SLinus Torvalds return xp; 18221da177e4SLinus Torvalds } 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 1825d51d081dSJamal Hadi Salim int dir, struct km_event *c) 18261da177e4SLinus Torvalds { 18271da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 18281da177e4SLinus Torvalds struct nlmsghdr *nlh; 1829d51d081dSJamal Hadi Salim int hard = c->data.hard; 18301da177e4SLinus Torvalds unsigned char *b = skb->tail; 18311da177e4SLinus Torvalds 1832d51d081dSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); 18331da177e4SLinus Torvalds upe = NLMSG_DATA(nlh); 18341da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 18351da177e4SLinus Torvalds 18361da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 18371da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 18381da177e4SLinus Torvalds goto nlmsg_failure; 1839df71837dSTrent Jaeger if (copy_to_user_sec_ctx(xp, skb)) 1840df71837dSTrent Jaeger goto nlmsg_failure; 18411da177e4SLinus Torvalds upe->hard = !!hard; 18421da177e4SLinus Torvalds 18431da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 18441da177e4SLinus Torvalds return skb->len; 18451da177e4SLinus Torvalds 18461da177e4SLinus Torvalds nlmsg_failure: 18471da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 18481da177e4SLinus Torvalds return -1; 18491da177e4SLinus Torvalds } 18501da177e4SLinus Torvalds 185126b15dadSJamal Hadi Salim static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 18521da177e4SLinus Torvalds { 18531da177e4SLinus Torvalds struct sk_buff *skb; 18541da177e4SLinus Torvalds size_t len; 18551da177e4SLinus Torvalds 18561da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 18571da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); 1858df71837dSTrent Jaeger len += RTA_SPACE(xfrm_user_sec_ctx_size(xp)); 18591da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 18601da177e4SLinus Torvalds if (skb == NULL) 18611da177e4SLinus Torvalds return -ENOMEM; 18621da177e4SLinus Torvalds 1863d51d081dSJamal Hadi Salim if (build_polexpire(skb, xp, dir, c) < 0) 18641da177e4SLinus Torvalds BUG(); 18651da177e4SLinus Torvalds 1866ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; 1867ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); 18681da177e4SLinus Torvalds } 18691da177e4SLinus Torvalds 187026b15dadSJamal Hadi Salim static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) 187126b15dadSJamal Hadi Salim { 187226b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 18730603eac0SHerbert Xu struct xfrm_userpolicy_id *id; 187426b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 187526b15dadSJamal Hadi Salim struct sk_buff *skb; 187626b15dadSJamal Hadi Salim unsigned char *b; 187726b15dadSJamal Hadi Salim int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 18780603eac0SHerbert Xu int headlen; 18790603eac0SHerbert Xu 18800603eac0SHerbert Xu headlen = sizeof(*p); 18810603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 18820603eac0SHerbert Xu len += RTA_SPACE(headlen); 18830603eac0SHerbert Xu headlen = sizeof(*id); 18840603eac0SHerbert Xu } 18850603eac0SHerbert Xu len += NLMSG_SPACE(headlen); 188626b15dadSJamal Hadi Salim 188726b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 188826b15dadSJamal Hadi Salim if (skb == NULL) 188926b15dadSJamal Hadi Salim return -ENOMEM; 189026b15dadSJamal Hadi Salim b = skb->tail; 189126b15dadSJamal Hadi Salim 18920603eac0SHerbert Xu nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); 189326b15dadSJamal Hadi Salim 189426b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 18950603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 18960603eac0SHerbert Xu id = NLMSG_DATA(nlh); 18970603eac0SHerbert Xu memset(id, 0, sizeof(*id)); 18980603eac0SHerbert Xu id->dir = dir; 18990603eac0SHerbert Xu if (c->data.byid) 19000603eac0SHerbert Xu id->index = xp->index; 19010603eac0SHerbert Xu else 19020603eac0SHerbert Xu memcpy(&id->sel, &xp->selector, sizeof(id->sel)); 19030603eac0SHerbert Xu 19040603eac0SHerbert Xu p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); 19050603eac0SHerbert Xu } 190626b15dadSJamal Hadi Salim 190726b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 190826b15dadSJamal Hadi Salim 190926b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 191026b15dadSJamal Hadi Salim if (copy_to_user_tmpl(xp, skb) < 0) 191126b15dadSJamal Hadi Salim goto nlmsg_failure; 191226b15dadSJamal Hadi Salim 191326b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 191426b15dadSJamal Hadi Salim 1915ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; 1916ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); 191726b15dadSJamal Hadi Salim 191826b15dadSJamal Hadi Salim nlmsg_failure: 19190603eac0SHerbert Xu rtattr_failure: 192026b15dadSJamal Hadi Salim kfree_skb(skb); 192126b15dadSJamal Hadi Salim return -1; 192226b15dadSJamal Hadi Salim } 192326b15dadSJamal Hadi Salim 192426b15dadSJamal Hadi Salim static int xfrm_notify_policy_flush(struct km_event *c) 192526b15dadSJamal Hadi Salim { 192626b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 192726b15dadSJamal Hadi Salim struct sk_buff *skb; 192826b15dadSJamal Hadi Salim unsigned char *b; 192926b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(0); 193026b15dadSJamal Hadi Salim 193126b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 193226b15dadSJamal Hadi Salim if (skb == NULL) 193326b15dadSJamal Hadi Salim return -ENOMEM; 193426b15dadSJamal Hadi Salim b = skb->tail; 193526b15dadSJamal Hadi Salim 193626b15dadSJamal Hadi Salim 193726b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); 193826b15dadSJamal Hadi Salim 193926b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 194026b15dadSJamal Hadi Salim 1941ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; 1942ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); 194326b15dadSJamal Hadi Salim 194426b15dadSJamal Hadi Salim nlmsg_failure: 194526b15dadSJamal Hadi Salim kfree_skb(skb); 194626b15dadSJamal Hadi Salim return -1; 194726b15dadSJamal Hadi Salim } 194826b15dadSJamal Hadi Salim 194926b15dadSJamal Hadi Salim static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 195026b15dadSJamal Hadi Salim { 195126b15dadSJamal Hadi Salim 195226b15dadSJamal Hadi Salim switch (c->event) { 1953f60f6b8fSHerbert Xu case XFRM_MSG_NEWPOLICY: 1954f60f6b8fSHerbert Xu case XFRM_MSG_UPDPOLICY: 1955f60f6b8fSHerbert Xu case XFRM_MSG_DELPOLICY: 195626b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 1957f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHPOLICY: 195826b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 1959f60f6b8fSHerbert Xu case XFRM_MSG_POLEXPIRE: 196026b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 196126b15dadSJamal Hadi Salim default: 196226b15dadSJamal Hadi Salim printk("xfrm_user: Unknown Policy event %d\n", c->event); 196326b15dadSJamal Hadi Salim } 196426b15dadSJamal Hadi Salim 196526b15dadSJamal Hadi Salim return 0; 196626b15dadSJamal Hadi Salim 196726b15dadSJamal Hadi Salim } 196826b15dadSJamal Hadi Salim 19691da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 19701da177e4SLinus Torvalds .id = "netlink", 19711da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 19721da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 19731da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 19741da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 19751da177e4SLinus Torvalds }; 19761da177e4SLinus Torvalds 19771da177e4SLinus Torvalds static int __init xfrm_user_init(void) 19781da177e4SLinus Torvalds { 1979be33690dSPatrick McHardy struct sock *nlsk; 1980be33690dSPatrick McHardy 19811da177e4SLinus Torvalds printk(KERN_INFO "Initializing IPsec netlink socket\n"); 19821da177e4SLinus Torvalds 1983be33690dSPatrick McHardy nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, 198406628607SPatrick McHardy xfrm_netlink_rcv, THIS_MODULE); 1985be33690dSPatrick McHardy if (nlsk == NULL) 19861da177e4SLinus Torvalds return -ENOMEM; 1987be33690dSPatrick McHardy rcu_assign_pointer(xfrm_nl, nlsk); 19881da177e4SLinus Torvalds 19891da177e4SLinus Torvalds xfrm_register_km(&netlink_mgr); 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds return 0; 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 19951da177e4SLinus Torvalds { 1996be33690dSPatrick McHardy struct sock *nlsk = xfrm_nl; 1997be33690dSPatrick McHardy 19981da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 1999be33690dSPatrick McHardy rcu_assign_pointer(xfrm_nl, NULL); 2000be33690dSPatrick McHardy synchronize_rcu(); 2001be33690dSPatrick McHardy sock_release(nlsk->sk_socket); 20021da177e4SLinus Torvalds } 20031da177e4SLinus Torvalds 20041da177e4SLinus Torvalds module_init(xfrm_user_init); 20051da177e4SLinus Torvalds module_exit(xfrm_user_exit); 20061da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 20074fdb3bb7SHarald Welte MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); 2008f8cd5488SJamal Hadi Salim 2009