11da177e4SLinus Torvalds /* xfrm_user.c: User interface to configure xfrm engine. 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Copyright (C) 2002 David S. Miller (davem@redhat.com) 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Changes: 61da177e4SLinus Torvalds * Mitsuru KANDA @USAGI 71da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI 81da177e4SLinus Torvalds * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 91da177e4SLinus Torvalds * IPv6 support 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds #include <linux/module.h> 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/types.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/socket.h> 181da177e4SLinus Torvalds #include <linux/string.h> 191da177e4SLinus Torvalds #include <linux/net.h> 201da177e4SLinus Torvalds #include <linux/skbuff.h> 211da177e4SLinus Torvalds #include <linux/netlink.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> 291da177e4SLinus Torvalds #include <asm/uaccess.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds static struct sock *xfrm_nl; 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) 341da177e4SLinus Torvalds { 351da177e4SLinus Torvalds struct rtattr *rt = xfrma[type - 1]; 361da177e4SLinus Torvalds struct xfrm_algo *algp; 3731c26852SHerbert Xu int len; 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds if (!rt) 401da177e4SLinus Torvalds return 0; 411da177e4SLinus Torvalds 4231c26852SHerbert Xu len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); 4331c26852SHerbert Xu if (len < 0) 441da177e4SLinus Torvalds return -EINVAL; 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds algp = RTA_DATA(rt); 4731c26852SHerbert Xu 4831c26852SHerbert Xu len -= (algp->alg_key_len + 7U) / 8; 4931c26852SHerbert Xu if (len < 0) 5031c26852SHerbert Xu return -EINVAL; 5131c26852SHerbert Xu 521da177e4SLinus Torvalds switch (type) { 531da177e4SLinus Torvalds case XFRMA_ALG_AUTH: 541da177e4SLinus Torvalds if (!algp->alg_key_len && 551da177e4SLinus Torvalds strcmp(algp->alg_name, "digest_null") != 0) 561da177e4SLinus Torvalds return -EINVAL; 571da177e4SLinus Torvalds break; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds case XFRMA_ALG_CRYPT: 601da177e4SLinus Torvalds if (!algp->alg_key_len && 611da177e4SLinus Torvalds strcmp(algp->alg_name, "cipher_null") != 0) 621da177e4SLinus Torvalds return -EINVAL; 631da177e4SLinus Torvalds break; 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds case XFRMA_ALG_COMP: 661da177e4SLinus Torvalds /* Zero length keys are legal. */ 671da177e4SLinus Torvalds break; 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds default: 701da177e4SLinus Torvalds return -EINVAL; 711da177e4SLinus Torvalds }; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; 741da177e4SLinus Torvalds return 0; 751da177e4SLinus Torvalds } 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds static int verify_encap_tmpl(struct rtattr **xfrma) 781da177e4SLinus Torvalds { 791da177e4SLinus Torvalds struct rtattr *rt = xfrma[XFRMA_ENCAP - 1]; 801da177e4SLinus Torvalds struct xfrm_encap_tmpl *encap; 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds if (!rt) 831da177e4SLinus Torvalds return 0; 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap)) 861da177e4SLinus Torvalds return -EINVAL; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds return 0; 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds static int verify_newsa_info(struct xfrm_usersa_info *p, 921da177e4SLinus Torvalds struct rtattr **xfrma) 931da177e4SLinus Torvalds { 941da177e4SLinus Torvalds int err; 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds err = -EINVAL; 971da177e4SLinus Torvalds switch (p->family) { 981da177e4SLinus Torvalds case AF_INET: 991da177e4SLinus Torvalds break; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds case AF_INET6: 1021da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1031da177e4SLinus Torvalds break; 1041da177e4SLinus Torvalds #else 1051da177e4SLinus Torvalds err = -EAFNOSUPPORT; 1061da177e4SLinus Torvalds goto out; 1071da177e4SLinus Torvalds #endif 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds default: 1101da177e4SLinus Torvalds goto out; 1111da177e4SLinus Torvalds }; 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds err = -EINVAL; 1141da177e4SLinus Torvalds switch (p->id.proto) { 1151da177e4SLinus Torvalds case IPPROTO_AH: 1161da177e4SLinus Torvalds if (!xfrma[XFRMA_ALG_AUTH-1] || 1171da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1] || 1181da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]) 1191da177e4SLinus Torvalds goto out; 1201da177e4SLinus Torvalds break; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds case IPPROTO_ESP: 1231da177e4SLinus Torvalds if ((!xfrma[XFRMA_ALG_AUTH-1] && 1241da177e4SLinus Torvalds !xfrma[XFRMA_ALG_CRYPT-1]) || 1251da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]) 1261da177e4SLinus Torvalds goto out; 1271da177e4SLinus Torvalds break; 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds case IPPROTO_COMP: 1301da177e4SLinus Torvalds if (!xfrma[XFRMA_ALG_COMP-1] || 1311da177e4SLinus Torvalds xfrma[XFRMA_ALG_AUTH-1] || 1321da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1]) 1331da177e4SLinus Torvalds goto out; 1341da177e4SLinus Torvalds break; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds default: 1371da177e4SLinus Torvalds goto out; 1381da177e4SLinus Torvalds }; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH))) 1411da177e4SLinus Torvalds goto out; 1421da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT))) 1431da177e4SLinus Torvalds goto out; 1441da177e4SLinus Torvalds if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP))) 1451da177e4SLinus Torvalds goto out; 1461da177e4SLinus Torvalds if ((err = verify_encap_tmpl(xfrma))) 1471da177e4SLinus Torvalds goto out; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds err = -EINVAL; 1501da177e4SLinus Torvalds switch (p->mode) { 1511da177e4SLinus Torvalds case 0: 1521da177e4SLinus Torvalds case 1: 1531da177e4SLinus Torvalds break; 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds default: 1561da177e4SLinus Torvalds goto out; 1571da177e4SLinus Torvalds }; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds err = 0; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds out: 1621da177e4SLinus Torvalds return err; 1631da177e4SLinus Torvalds } 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, 1661da177e4SLinus Torvalds struct xfrm_algo_desc *(*get_byname)(char *, int), 1671da177e4SLinus Torvalds struct rtattr *u_arg) 1681da177e4SLinus Torvalds { 1691da177e4SLinus Torvalds struct rtattr *rta = u_arg; 1701da177e4SLinus Torvalds struct xfrm_algo *p, *ualg; 1711da177e4SLinus Torvalds struct xfrm_algo_desc *algo; 172b9e9deadSHerbert Xu int len; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds if (!rta) 1751da177e4SLinus Torvalds return 0; 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds ualg = RTA_DATA(rta); 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds algo = get_byname(ualg->alg_name, 1); 1801da177e4SLinus Torvalds if (!algo) 1811da177e4SLinus Torvalds return -ENOSYS; 1821da177e4SLinus Torvalds *props = algo->desc.sadb_alg_id; 1831da177e4SLinus Torvalds 184b9e9deadSHerbert Xu len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8; 185b9e9deadSHerbert Xu p = kmalloc(len, GFP_KERNEL); 1861da177e4SLinus Torvalds if (!p) 1871da177e4SLinus Torvalds return -ENOMEM; 1881da177e4SLinus Torvalds 189b9e9deadSHerbert Xu memcpy(p, ualg, len); 1901da177e4SLinus Torvalds *algpp = p; 1911da177e4SLinus Torvalds return 0; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds struct rtattr *rta = u_arg; 1971da177e4SLinus Torvalds struct xfrm_encap_tmpl *p, *uencap; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds if (!rta) 2001da177e4SLinus Torvalds return 0; 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds uencap = RTA_DATA(rta); 2031da177e4SLinus Torvalds p = kmalloc(sizeof(*p), GFP_KERNEL); 2041da177e4SLinus Torvalds if (!p) 2051da177e4SLinus Torvalds return -ENOMEM; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds memcpy(p, uencap, sizeof(*p)); 2081da177e4SLinus Torvalds *encapp = p; 2091da177e4SLinus Torvalds return 0; 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 2131da177e4SLinus Torvalds { 2141da177e4SLinus Torvalds memcpy(&x->id, &p->id, sizeof(x->id)); 2151da177e4SLinus Torvalds memcpy(&x->sel, &p->sel, sizeof(x->sel)); 2161da177e4SLinus Torvalds memcpy(&x->lft, &p->lft, sizeof(x->lft)); 2171da177e4SLinus Torvalds x->props.mode = p->mode; 2181da177e4SLinus Torvalds x->props.replay_window = p->replay_window; 2191da177e4SLinus Torvalds x->props.reqid = p->reqid; 2201da177e4SLinus Torvalds x->props.family = p->family; 2211da177e4SLinus Torvalds x->props.saddr = p->saddr; 2221da177e4SLinus Torvalds x->props.flags = p->flags; 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, 2261da177e4SLinus Torvalds struct rtattr **xfrma, 2271da177e4SLinus Torvalds int *errp) 2281da177e4SLinus Torvalds { 2291da177e4SLinus Torvalds struct xfrm_state *x = xfrm_state_alloc(); 2301da177e4SLinus Torvalds int err = -ENOMEM; 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds if (!x) 2331da177e4SLinus Torvalds goto error_no_put; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds copy_from_user_state(x, p); 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, 2381da177e4SLinus Torvalds xfrm_aalg_get_byname, 2391da177e4SLinus Torvalds xfrma[XFRMA_ALG_AUTH-1]))) 2401da177e4SLinus Torvalds goto error; 2411da177e4SLinus Torvalds if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, 2421da177e4SLinus Torvalds xfrm_ealg_get_byname, 2431da177e4SLinus Torvalds xfrma[XFRMA_ALG_CRYPT-1]))) 2441da177e4SLinus Torvalds goto error; 2451da177e4SLinus Torvalds if ((err = attach_one_algo(&x->calg, &x->props.calgo, 2461da177e4SLinus Torvalds xfrm_calg_get_byname, 2471da177e4SLinus Torvalds xfrma[XFRMA_ALG_COMP-1]))) 2481da177e4SLinus Torvalds goto error; 2491da177e4SLinus Torvalds if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) 2501da177e4SLinus Torvalds goto error; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds err = -ENOENT; 2531da177e4SLinus Torvalds x->type = xfrm_get_type(x->id.proto, x->props.family); 2541da177e4SLinus Torvalds if (x->type == NULL) 2551da177e4SLinus Torvalds goto error; 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds err = x->type->init_state(x, NULL); 2581da177e4SLinus Torvalds if (err) 2591da177e4SLinus Torvalds goto error; 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds x->curlft.add_time = (unsigned long) xtime.tv_sec; 2621da177e4SLinus Torvalds x->km.state = XFRM_STATE_VALID; 2631da177e4SLinus Torvalds x->km.seq = p->seq; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds return x; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds error: 2681da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 2691da177e4SLinus Torvalds xfrm_state_put(x); 2701da177e4SLinus Torvalds error_no_put: 2711da177e4SLinus Torvalds *errp = err; 2721da177e4SLinus Torvalds return NULL; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 2761da177e4SLinus Torvalds { 2771da177e4SLinus Torvalds struct xfrm_usersa_info *p = NLMSG_DATA(nlh); 2781da177e4SLinus Torvalds struct xfrm_state *x; 2791da177e4SLinus Torvalds int err; 280*26b15dadSJamal Hadi Salim struct km_event c; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds err = verify_newsa_info(p, (struct rtattr **) xfrma); 2831da177e4SLinus Torvalds if (err) 2841da177e4SLinus Torvalds return err; 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds x = xfrm_state_construct(p, (struct rtattr **) xfrma, &err); 2871da177e4SLinus Torvalds if (!x) 2881da177e4SLinus Torvalds return err; 2891da177e4SLinus Torvalds 290*26b15dadSJamal Hadi Salim xfrm_state_hold(x); 2911da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 2921da177e4SLinus Torvalds err = xfrm_state_add(x); 2931da177e4SLinus Torvalds else 2941da177e4SLinus Torvalds err = xfrm_state_update(x); 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds if (err < 0) { 2971da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 2981da177e4SLinus Torvalds xfrm_state_put(x); 299*26b15dadSJamal Hadi Salim return err; 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 302*26b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 303*26b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 304*26b15dadSJamal Hadi Salim if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 305*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_ADDED; 306*26b15dadSJamal Hadi Salim else 307*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_UPDATED; 308*26b15dadSJamal Hadi Salim 309*26b15dadSJamal Hadi Salim km_state_notify(x, &c); 310*26b15dadSJamal Hadi Salim xfrm_state_put(x); 311*26b15dadSJamal Hadi Salim 3121da177e4SLinus Torvalds return err; 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 3161da177e4SLinus Torvalds { 3171da177e4SLinus Torvalds struct xfrm_state *x; 318*26b15dadSJamal Hadi Salim int err; 319*26b15dadSJamal Hadi Salim struct km_event c; 3201da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 3231da177e4SLinus Torvalds if (x == NULL) 3241da177e4SLinus Torvalds return -ESRCH; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 3271da177e4SLinus Torvalds xfrm_state_put(x); 3281da177e4SLinus Torvalds return -EPERM; 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds 331*26b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 332*26b15dadSJamal Hadi Salim if (err < 0) { 333*26b15dadSJamal Hadi Salim xfrm_state_put(x); 334*26b15dadSJamal Hadi Salim return err; 335*26b15dadSJamal Hadi Salim } 336*26b15dadSJamal Hadi Salim 337*26b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 338*26b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 339*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_DELETED; 340*26b15dadSJamal Hadi Salim km_state_notify(x, &c); 3411da177e4SLinus Torvalds xfrm_state_put(x); 3421da177e4SLinus Torvalds 343*26b15dadSJamal Hadi Salim return err; 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 3491da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 3501da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 3511da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 3521da177e4SLinus Torvalds memcpy(&p->stats, &x->stats, sizeof(p->stats)); 3531da177e4SLinus Torvalds p->saddr = x->props.saddr; 3541da177e4SLinus Torvalds p->mode = x->props.mode; 3551da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 3561da177e4SLinus Torvalds p->reqid = x->props.reqid; 3571da177e4SLinus Torvalds p->family = x->props.family; 3581da177e4SLinus Torvalds p->flags = x->props.flags; 3591da177e4SLinus Torvalds p->seq = x->km.seq; 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds struct xfrm_dump_info { 3631da177e4SLinus Torvalds struct sk_buff *in_skb; 3641da177e4SLinus Torvalds struct sk_buff *out_skb; 3651da177e4SLinus Torvalds u32 nlmsg_seq; 3661da177e4SLinus Torvalds u16 nlmsg_flags; 3671da177e4SLinus Torvalds int start_idx; 3681da177e4SLinus Torvalds int this_idx; 3691da177e4SLinus Torvalds }; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 3721da177e4SLinus Torvalds { 3731da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 3741da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 3751da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 3761da177e4SLinus Torvalds struct xfrm_usersa_info *p; 3771da177e4SLinus Torvalds struct nlmsghdr *nlh; 3781da177e4SLinus Torvalds unsigned char *b = skb->tail; 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 3811da177e4SLinus Torvalds goto out; 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 3841da177e4SLinus Torvalds sp->nlmsg_seq, 3851da177e4SLinus Torvalds XFRM_MSG_NEWSA, sizeof(*p)); 3861da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 3891da177e4SLinus Torvalds copy_to_user_state(x, p); 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds if (x->aalg) 3921da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_AUTH, 3931da177e4SLinus Torvalds sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 3941da177e4SLinus Torvalds if (x->ealg) 3951da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_CRYPT, 3961da177e4SLinus Torvalds sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 3971da177e4SLinus Torvalds if (x->calg) 3981da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds if (x->encap) 4011da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 4041da177e4SLinus Torvalds out: 4051da177e4SLinus Torvalds sp->this_idx++; 4061da177e4SLinus Torvalds return 0; 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds nlmsg_failure: 4091da177e4SLinus Torvalds rtattr_failure: 4101da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 4111da177e4SLinus Torvalds return -1; 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 4151da177e4SLinus Torvalds { 4161da177e4SLinus Torvalds struct xfrm_dump_info info; 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds info.in_skb = cb->skb; 4191da177e4SLinus Torvalds info.out_skb = skb; 4201da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 4211da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 4221da177e4SLinus Torvalds info.this_idx = 0; 4231da177e4SLinus Torvalds info.start_idx = cb->args[0]; 4241da177e4SLinus Torvalds (void) xfrm_state_walk(IPSEC_PROTO_ANY, dump_one_state, &info); 4251da177e4SLinus Torvalds cb->args[0] = info.this_idx; 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds return skb->len; 4281da177e4SLinus Torvalds } 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 4311da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 4321da177e4SLinus Torvalds { 4331da177e4SLinus Torvalds struct xfrm_dump_info info; 4341da177e4SLinus Torvalds struct sk_buff *skb; 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 4371da177e4SLinus Torvalds if (!skb) 4381da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 4411da177e4SLinus Torvalds info.in_skb = in_skb; 4421da177e4SLinus Torvalds info.out_skb = skb; 4431da177e4SLinus Torvalds info.nlmsg_seq = seq; 4441da177e4SLinus Torvalds info.nlmsg_flags = 0; 4451da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds if (dump_one_state(x, 0, &info)) { 4481da177e4SLinus Torvalds kfree_skb(skb); 4491da177e4SLinus Torvalds return NULL; 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds return skb; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 4561da177e4SLinus Torvalds { 4571da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 4581da177e4SLinus Torvalds struct xfrm_state *x; 4591da177e4SLinus Torvalds struct sk_buff *resp_skb; 4601da177e4SLinus Torvalds int err; 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 4631da177e4SLinus Torvalds err = -ESRCH; 4641da177e4SLinus Torvalds if (x == NULL) 4651da177e4SLinus Torvalds goto out_noput; 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 4681da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 4691da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 4701da177e4SLinus Torvalds } else { 4711da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 4721da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds xfrm_state_put(x); 4751da177e4SLinus Torvalds out_noput: 4761da177e4SLinus Torvalds return err; 4771da177e4SLinus Torvalds } 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds static int verify_userspi_info(struct xfrm_userspi_info *p) 4801da177e4SLinus Torvalds { 4811da177e4SLinus Torvalds switch (p->info.id.proto) { 4821da177e4SLinus Torvalds case IPPROTO_AH: 4831da177e4SLinus Torvalds case IPPROTO_ESP: 4841da177e4SLinus Torvalds break; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds case IPPROTO_COMP: 4871da177e4SLinus Torvalds /* IPCOMP spi is 16-bits. */ 4881da177e4SLinus Torvalds if (p->max >= 0x10000) 4891da177e4SLinus Torvalds return -EINVAL; 4901da177e4SLinus Torvalds break; 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds default: 4931da177e4SLinus Torvalds return -EINVAL; 4941da177e4SLinus Torvalds }; 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds if (p->min > p->max) 4971da177e4SLinus Torvalds return -EINVAL; 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds return 0; 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 5031da177e4SLinus Torvalds { 5041da177e4SLinus Torvalds struct xfrm_state *x; 5051da177e4SLinus Torvalds struct xfrm_userspi_info *p; 5061da177e4SLinus Torvalds struct sk_buff *resp_skb; 5071da177e4SLinus Torvalds xfrm_address_t *daddr; 5081da177e4SLinus Torvalds int family; 5091da177e4SLinus Torvalds int err; 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 5121da177e4SLinus Torvalds err = verify_userspi_info(p); 5131da177e4SLinus Torvalds if (err) 5141da177e4SLinus Torvalds goto out_noput; 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds family = p->info.family; 5171da177e4SLinus Torvalds daddr = &p->info.id.daddr; 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds x = NULL; 5201da177e4SLinus Torvalds if (p->info.seq) { 5211da177e4SLinus Torvalds x = xfrm_find_acq_byseq(p->info.seq); 5221da177e4SLinus Torvalds if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { 5231da177e4SLinus Torvalds xfrm_state_put(x); 5241da177e4SLinus Torvalds x = NULL; 5251da177e4SLinus Torvalds } 5261da177e4SLinus Torvalds } 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds if (!x) 5291da177e4SLinus Torvalds x = xfrm_find_acq(p->info.mode, p->info.reqid, 5301da177e4SLinus Torvalds p->info.id.proto, daddr, 5311da177e4SLinus Torvalds &p->info.saddr, 1, 5321da177e4SLinus Torvalds family); 5331da177e4SLinus Torvalds err = -ENOENT; 5341da177e4SLinus Torvalds if (x == NULL) 5351da177e4SLinus Torvalds goto out_noput; 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds resp_skb = ERR_PTR(-ENOENT); 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds spin_lock_bh(&x->lock); 5401da177e4SLinus Torvalds if (x->km.state != XFRM_STATE_DEAD) { 5411da177e4SLinus Torvalds xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); 5421da177e4SLinus Torvalds if (x->id.spi) 5431da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 5481da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 5491da177e4SLinus Torvalds goto out; 5501da177e4SLinus Torvalds } 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 5531da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds out: 5561da177e4SLinus Torvalds xfrm_state_put(x); 5571da177e4SLinus Torvalds out_noput: 5581da177e4SLinus Torvalds return err; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds static int verify_policy_dir(__u8 dir) 5621da177e4SLinus Torvalds { 5631da177e4SLinus Torvalds switch (dir) { 5641da177e4SLinus Torvalds case XFRM_POLICY_IN: 5651da177e4SLinus Torvalds case XFRM_POLICY_OUT: 5661da177e4SLinus Torvalds case XFRM_POLICY_FWD: 5671da177e4SLinus Torvalds break; 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds default: 5701da177e4SLinus Torvalds return -EINVAL; 5711da177e4SLinus Torvalds }; 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds return 0; 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) 5771da177e4SLinus Torvalds { 5781da177e4SLinus Torvalds switch (p->share) { 5791da177e4SLinus Torvalds case XFRM_SHARE_ANY: 5801da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 5811da177e4SLinus Torvalds case XFRM_SHARE_USER: 5821da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 5831da177e4SLinus Torvalds break; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds default: 5861da177e4SLinus Torvalds return -EINVAL; 5871da177e4SLinus Torvalds }; 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds switch (p->action) { 5901da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 5911da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 5921da177e4SLinus Torvalds break; 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvalds default: 5951da177e4SLinus Torvalds return -EINVAL; 5961da177e4SLinus Torvalds }; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds switch (p->sel.family) { 5991da177e4SLinus Torvalds case AF_INET: 6001da177e4SLinus Torvalds break; 6011da177e4SLinus Torvalds 6021da177e4SLinus Torvalds case AF_INET6: 6031da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 6041da177e4SLinus Torvalds break; 6051da177e4SLinus Torvalds #else 6061da177e4SLinus Torvalds return -EAFNOSUPPORT; 6071da177e4SLinus Torvalds #endif 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds default: 6101da177e4SLinus Torvalds return -EINVAL; 6111da177e4SLinus Torvalds }; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds return verify_policy_dir(p->dir); 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 6171da177e4SLinus Torvalds int nr) 6181da177e4SLinus Torvalds { 6191da177e4SLinus Torvalds int i; 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds xp->xfrm_nr = nr; 6221da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 6231da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 6261da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 6271da177e4SLinus Torvalds sizeof(xfrm_address_t)); 6281da177e4SLinus Torvalds t->reqid = ut->reqid; 6291da177e4SLinus Torvalds t->mode = ut->mode; 6301da177e4SLinus Torvalds t->share = ut->share; 6311da177e4SLinus Torvalds t->optional = ut->optional; 6321da177e4SLinus Torvalds t->aalgos = ut->aalgos; 6331da177e4SLinus Torvalds t->ealgos = ut->ealgos; 6341da177e4SLinus Torvalds t->calgos = ut->calgos; 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) 6391da177e4SLinus Torvalds { 6401da177e4SLinus Torvalds struct rtattr *rt = xfrma[XFRMA_TMPL-1]; 6411da177e4SLinus Torvalds struct xfrm_user_tmpl *utmpl; 6421da177e4SLinus Torvalds int nr; 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds if (!rt) { 6451da177e4SLinus Torvalds pol->xfrm_nr = 0; 6461da177e4SLinus Torvalds } else { 6471da177e4SLinus Torvalds nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 6501da177e4SLinus Torvalds return -EINVAL; 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds copy_templates(pol, RTA_DATA(rt), nr); 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds return 0; 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 6581da177e4SLinus Torvalds { 6591da177e4SLinus Torvalds xp->priority = p->priority; 6601da177e4SLinus Torvalds xp->index = p->index; 6611da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 6621da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 6631da177e4SLinus Torvalds xp->action = p->action; 6641da177e4SLinus Torvalds xp->flags = p->flags; 6651da177e4SLinus Torvalds xp->family = p->sel.family; 6661da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds 6691da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 6701da177e4SLinus Torvalds { 6711da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 6721da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 6731da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 6741da177e4SLinus Torvalds p->priority = xp->priority; 6751da177e4SLinus Torvalds p->index = xp->index; 6761da177e4SLinus Torvalds p->sel.family = xp->family; 6771da177e4SLinus Torvalds p->dir = dir; 6781da177e4SLinus Torvalds p->action = xp->action; 6791da177e4SLinus Torvalds p->flags = xp->flags; 6801da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) 6841da177e4SLinus Torvalds { 6851da177e4SLinus Torvalds struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); 6861da177e4SLinus Torvalds int err; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds if (!xp) { 6891da177e4SLinus Torvalds *errp = -ENOMEM; 6901da177e4SLinus Torvalds return NULL; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds copy_from_user_policy(xp, p); 6941da177e4SLinus Torvalds err = copy_from_user_tmpl(xp, xfrma); 6951da177e4SLinus Torvalds if (err) { 6961da177e4SLinus Torvalds *errp = err; 6971da177e4SLinus Torvalds kfree(xp); 6981da177e4SLinus Torvalds xp = NULL; 6991da177e4SLinus Torvalds } 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds return xp; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 7051da177e4SLinus Torvalds { 7061da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); 7071da177e4SLinus Torvalds struct xfrm_policy *xp; 708*26b15dadSJamal Hadi Salim struct km_event c; 7091da177e4SLinus Torvalds int err; 7101da177e4SLinus Torvalds int excl; 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds err = verify_newpolicy_info(p); 7131da177e4SLinus Torvalds if (err) 7141da177e4SLinus Torvalds return err; 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds xp = xfrm_policy_construct(p, (struct rtattr **) xfrma, &err); 7171da177e4SLinus Torvalds if (!xp) 7181da177e4SLinus Torvalds return err; 7191da177e4SLinus Torvalds 720*26b15dadSJamal Hadi Salim /* shouldnt excl be based on nlh flags?? 721*26b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 722*26b15dadSJamal Hadi Salim * in netlink excl is a flag and you wouldnt need 723*26b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 7241da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 7251da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 7261da177e4SLinus Torvalds if (err) { 7271da177e4SLinus Torvalds kfree(xp); 7281da177e4SLinus Torvalds return err; 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds 731*26b15dadSJamal Hadi Salim if (!excl) 732*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_UPDATED; 733*26b15dadSJamal Hadi Salim else 734*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_ADDED; 735*26b15dadSJamal Hadi Salim 736*26b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 737*26b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 738*26b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 739*26b15dadSJamal Hadi Salim 7401da177e4SLinus Torvalds xfrm_pol_put(xp); 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds return 0; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 7461da177e4SLinus Torvalds { 7471da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 7481da177e4SLinus Torvalds int i; 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 7511da177e4SLinus Torvalds return 0; 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 7541da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 7551da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 7561da177e4SLinus Torvalds 7571da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 7581da177e4SLinus Torvalds up->family = xp->family; 7591da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 7601da177e4SLinus Torvalds up->reqid = kp->reqid; 7611da177e4SLinus Torvalds up->mode = kp->mode; 7621da177e4SLinus Torvalds up->share = kp->share; 7631da177e4SLinus Torvalds up->optional = kp->optional; 7641da177e4SLinus Torvalds up->aalgos = kp->aalgos; 7651da177e4SLinus Torvalds up->ealgos = kp->ealgos; 7661da177e4SLinus Torvalds up->calgos = kp->calgos; 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_TMPL, 7691da177e4SLinus Torvalds (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), 7701da177e4SLinus Torvalds vec); 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds return 0; 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds rtattr_failure: 7751da177e4SLinus Torvalds return -1; 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 7791da177e4SLinus Torvalds { 7801da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 7811da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 7821da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 7831da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 7841da177e4SLinus Torvalds struct nlmsghdr *nlh; 7851da177e4SLinus Torvalds unsigned char *b = skb->tail; 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 7881da177e4SLinus Torvalds goto out; 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 7911da177e4SLinus Torvalds sp->nlmsg_seq, 7921da177e4SLinus Torvalds XFRM_MSG_NEWPOLICY, sizeof(*p)); 7931da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 7941da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 7971da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 7981da177e4SLinus Torvalds goto nlmsg_failure; 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 8011da177e4SLinus Torvalds out: 8021da177e4SLinus Torvalds sp->this_idx++; 8031da177e4SLinus Torvalds return 0; 8041da177e4SLinus Torvalds 8051da177e4SLinus Torvalds nlmsg_failure: 8061da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 8071da177e4SLinus Torvalds return -1; 8081da177e4SLinus Torvalds } 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 8111da177e4SLinus Torvalds { 8121da177e4SLinus Torvalds struct xfrm_dump_info info; 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds info.in_skb = cb->skb; 8151da177e4SLinus Torvalds info.out_skb = skb; 8161da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 8171da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 8181da177e4SLinus Torvalds info.this_idx = 0; 8191da177e4SLinus Torvalds info.start_idx = cb->args[0]; 8201da177e4SLinus Torvalds (void) xfrm_policy_walk(dump_one_policy, &info); 8211da177e4SLinus Torvalds cb->args[0] = info.this_idx; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds return skb->len; 8241da177e4SLinus Torvalds } 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 8271da177e4SLinus Torvalds struct xfrm_policy *xp, 8281da177e4SLinus Torvalds int dir, u32 seq) 8291da177e4SLinus Torvalds { 8301da177e4SLinus Torvalds struct xfrm_dump_info info; 8311da177e4SLinus Torvalds struct sk_buff *skb; 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 8341da177e4SLinus Torvalds if (!skb) 8351da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 8381da177e4SLinus Torvalds info.in_skb = in_skb; 8391da177e4SLinus Torvalds info.out_skb = skb; 8401da177e4SLinus Torvalds info.nlmsg_seq = seq; 8411da177e4SLinus Torvalds info.nlmsg_flags = 0; 8421da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds if (dump_one_policy(xp, dir, 0, &info) < 0) { 8451da177e4SLinus Torvalds kfree_skb(skb); 8461da177e4SLinus Torvalds return NULL; 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds return skb; 8501da177e4SLinus Torvalds } 8511da177e4SLinus Torvalds 8521da177e4SLinus Torvalds static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 8531da177e4SLinus Torvalds { 8541da177e4SLinus Torvalds struct xfrm_policy *xp; 8551da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 8561da177e4SLinus Torvalds int err; 857*26b15dadSJamal Hadi Salim struct km_event c; 8581da177e4SLinus Torvalds int delete; 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 8611da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds err = verify_policy_dir(p->dir); 8641da177e4SLinus Torvalds if (err) 8651da177e4SLinus Torvalds return err; 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds if (p->index) 8681da177e4SLinus Torvalds xp = xfrm_policy_byid(p->dir, p->index, delete); 8691da177e4SLinus Torvalds else 8701da177e4SLinus Torvalds xp = xfrm_policy_bysel(p->dir, &p->sel, delete); 8711da177e4SLinus Torvalds if (xp == NULL) 8721da177e4SLinus Torvalds return -ENOENT; 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds if (!delete) { 8751da177e4SLinus Torvalds struct sk_buff *resp_skb; 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 8781da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 8791da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 8801da177e4SLinus Torvalds } else { 8811da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 8821da177e4SLinus Torvalds NETLINK_CB(skb).pid, 8831da177e4SLinus Torvalds MSG_DONTWAIT); 8841da177e4SLinus Torvalds } 885*26b15dadSJamal Hadi Salim } else { 886*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_DELETED; 887*26b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 888*26b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 889*26b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 8901da177e4SLinus Torvalds } 8911da177e4SLinus Torvalds 8921da177e4SLinus Torvalds xfrm_pol_put(xp); 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds return err; 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 8981da177e4SLinus Torvalds { 899*26b15dadSJamal Hadi Salim struct km_event c; 9001da177e4SLinus Torvalds struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); 9011da177e4SLinus Torvalds 9021da177e4SLinus Torvalds xfrm_state_flush(p->proto); 903*26b15dadSJamal Hadi Salim c.data = p->proto; 904*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_FLUSHED; 905*26b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 906*26b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 907*26b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 908*26b15dadSJamal Hadi Salim 9091da177e4SLinus Torvalds return 0; 9101da177e4SLinus Torvalds } 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 9131da177e4SLinus Torvalds { 914*26b15dadSJamal Hadi Salim struct km_event c; 915*26b15dadSJamal Hadi Salim 9161da177e4SLinus Torvalds xfrm_policy_flush(); 917*26b15dadSJamal Hadi Salim c.event = XFRM_SAP_FLUSHED; 918*26b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 919*26b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 920*26b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 9211da177e4SLinus Torvalds return 0; 9221da177e4SLinus Torvalds } 9231da177e4SLinus Torvalds 924492b558bSThomas Graf #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) 925492b558bSThomas Graf 926492b558bSThomas Graf static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 927492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 928492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 929492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 930492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 931492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 932492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 933492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 934492b558bSThomas Graf [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 935492b558bSThomas Graf [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 936492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 937492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 938492b558bSThomas Graf [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 939492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 940492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), 9411da177e4SLinus Torvalds }; 9421da177e4SLinus Torvalds 943492b558bSThomas Graf #undef XMSGSIZE 944492b558bSThomas Graf 9451da177e4SLinus Torvalds static struct xfrm_link { 9461da177e4SLinus Torvalds int (*doit)(struct sk_buff *, struct nlmsghdr *, void **); 9471da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 948492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 949492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 950492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 951492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 952492b558bSThomas Graf .dump = xfrm_dump_sa }, 953492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 954492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 955492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 956492b558bSThomas Graf .dump = xfrm_dump_policy }, 957492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 958492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 959492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 960492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 961492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 9621da177e4SLinus Torvalds }; 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds static int xfrm_done(struct netlink_callback *cb) 9651da177e4SLinus Torvalds { 9661da177e4SLinus Torvalds return 0; 9671da177e4SLinus Torvalds } 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) 9701da177e4SLinus Torvalds { 9711da177e4SLinus Torvalds struct rtattr *xfrma[XFRMA_MAX]; 9721da177e4SLinus Torvalds struct xfrm_link *link; 9731da177e4SLinus Torvalds int type, min_len; 9741da177e4SLinus Torvalds 9751da177e4SLinus Torvalds if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) 9761da177e4SLinus Torvalds return 0; 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds type = nlh->nlmsg_type; 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds /* A control message: ignore them */ 9811da177e4SLinus Torvalds if (type < XFRM_MSG_BASE) 9821da177e4SLinus Torvalds return 0; 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds /* Unknown message: reply with EINVAL */ 9851da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 9861da177e4SLinus Torvalds goto err_einval; 9871da177e4SLinus Torvalds 9881da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 9891da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds /* All operations require privileges, even GET */ 9921da177e4SLinus Torvalds if (security_netlink_recv(skb)) { 9931da177e4SLinus Torvalds *errp = -EPERM; 9941da177e4SLinus Torvalds return -1; 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 997492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 998492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 999492b558bSThomas Graf (nlh->nlmsg_flags & NLM_F_DUMP)) { 10001da177e4SLinus Torvalds u32 rlen; 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds if (link->dump == NULL) 10031da177e4SLinus Torvalds goto err_einval; 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh, 10061da177e4SLinus Torvalds link->dump, 10071da177e4SLinus Torvalds xfrm_done)) != 0) { 10081da177e4SLinus Torvalds return -1; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds rlen = NLMSG_ALIGN(nlh->nlmsg_len); 10111da177e4SLinus Torvalds if (rlen > skb->len) 10121da177e4SLinus Torvalds rlen = skb->len; 10131da177e4SLinus Torvalds skb_pull(skb, rlen); 10141da177e4SLinus Torvalds return -1; 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds memset(xfrma, 0, sizeof(xfrma)); 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) 10201da177e4SLinus Torvalds goto err_einval; 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds if (nlh->nlmsg_len > min_len) { 10231da177e4SLinus Torvalds int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 10241da177e4SLinus Torvalds struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); 10251da177e4SLinus Torvalds 10261da177e4SLinus Torvalds while (RTA_OK(attr, attrlen)) { 10271da177e4SLinus Torvalds unsigned short flavor = attr->rta_type; 10281da177e4SLinus Torvalds if (flavor) { 10291da177e4SLinus Torvalds if (flavor > XFRMA_MAX) 10301da177e4SLinus Torvalds goto err_einval; 10311da177e4SLinus Torvalds xfrma[flavor - 1] = attr; 10321da177e4SLinus Torvalds } 10331da177e4SLinus Torvalds attr = RTA_NEXT(attr, attrlen); 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds } 10361da177e4SLinus Torvalds 10371da177e4SLinus Torvalds if (link->doit == NULL) 10381da177e4SLinus Torvalds goto err_einval; 10391da177e4SLinus Torvalds *errp = link->doit(skb, nlh, (void **) &xfrma); 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds return *errp; 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds err_einval: 10441da177e4SLinus Torvalds *errp = -EINVAL; 10451da177e4SLinus Torvalds return -1; 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds static int xfrm_user_rcv_skb(struct sk_buff *skb) 10491da177e4SLinus Torvalds { 10501da177e4SLinus Torvalds int err; 10511da177e4SLinus Torvalds struct nlmsghdr *nlh; 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds while (skb->len >= NLMSG_SPACE(0)) { 10541da177e4SLinus Torvalds u32 rlen; 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds nlh = (struct nlmsghdr *) skb->data; 10571da177e4SLinus Torvalds if (nlh->nlmsg_len < sizeof(*nlh) || 10581da177e4SLinus Torvalds skb->len < nlh->nlmsg_len) 10591da177e4SLinus Torvalds return 0; 10601da177e4SLinus Torvalds rlen = NLMSG_ALIGN(nlh->nlmsg_len); 10611da177e4SLinus Torvalds if (rlen > skb->len) 10621da177e4SLinus Torvalds rlen = skb->len; 10631da177e4SLinus Torvalds if (xfrm_user_rcv_msg(skb, nlh, &err) < 0) { 10641da177e4SLinus Torvalds if (err == 0) 10651da177e4SLinus Torvalds return -1; 10661da177e4SLinus Torvalds netlink_ack(skb, nlh, err); 10671da177e4SLinus Torvalds } else if (nlh->nlmsg_flags & NLM_F_ACK) 10681da177e4SLinus Torvalds netlink_ack(skb, nlh, 0); 10691da177e4SLinus Torvalds skb_pull(skb, rlen); 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds 10721da177e4SLinus Torvalds return 0; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds static void xfrm_netlink_rcv(struct sock *sk, int len) 10761da177e4SLinus Torvalds { 10772a0a6ebeSHerbert Xu unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); 10782a0a6ebeSHerbert Xu 10791da177e4SLinus Torvalds do { 10801da177e4SLinus Torvalds struct sk_buff *skb; 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds down(&xfrm_cfg_sem); 10831da177e4SLinus Torvalds 10842a0a6ebeSHerbert Xu if (qlen > skb_queue_len(&sk->sk_receive_queue)) 10852a0a6ebeSHerbert Xu qlen = skb_queue_len(&sk->sk_receive_queue); 10862a0a6ebeSHerbert Xu 108709e14305SDavid S. Miller for (; qlen; qlen--) { 10882a0a6ebeSHerbert Xu skb = skb_dequeue(&sk->sk_receive_queue); 10891da177e4SLinus Torvalds if (xfrm_user_rcv_skb(skb)) { 109009e14305SDavid S. Miller if (skb->len) 10911da177e4SLinus Torvalds skb_queue_head(&sk->sk_receive_queue, 10921da177e4SLinus Torvalds skb); 10930f4821e7SDavid S. Miller else { 10941da177e4SLinus Torvalds kfree_skb(skb); 10950f4821e7SDavid S. Miller qlen--; 10960f4821e7SDavid S. Miller } 10971da177e4SLinus Torvalds break; 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds kfree_skb(skb); 11001da177e4SLinus Torvalds } 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds up(&xfrm_cfg_sem); 11031da177e4SLinus Torvalds 11042a0a6ebeSHerbert Xu } while (qlen); 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds static int build_expire(struct sk_buff *skb, struct xfrm_state *x, int hard) 11081da177e4SLinus Torvalds { 11091da177e4SLinus Torvalds struct xfrm_user_expire *ue; 11101da177e4SLinus Torvalds struct nlmsghdr *nlh; 11111da177e4SLinus Torvalds unsigned char *b = skb->tail; 11121da177e4SLinus Torvalds 11131da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_EXPIRE, 11141da177e4SLinus Torvalds sizeof(*ue)); 11151da177e4SLinus Torvalds ue = NLMSG_DATA(nlh); 11161da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 11171da177e4SLinus Torvalds 11181da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 11191da177e4SLinus Torvalds ue->hard = (hard != 0) ? 1 : 0; 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 11221da177e4SLinus Torvalds return skb->len; 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds nlmsg_failure: 11251da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 11261da177e4SLinus Torvalds return -1; 11271da177e4SLinus Torvalds } 11281da177e4SLinus Torvalds 1129*26b15dadSJamal Hadi Salim static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) 11301da177e4SLinus Torvalds { 11311da177e4SLinus Torvalds struct sk_buff *skb; 1132*26b15dadSJamal Hadi Salim int hard = c ->data; 11331da177e4SLinus Torvalds 1134*26b15dadSJamal Hadi Salim /* fix to do alloc using NLM macros */ 11351da177e4SLinus Torvalds skb = alloc_skb(sizeof(struct xfrm_user_expire) + 16, GFP_ATOMIC); 11361da177e4SLinus Torvalds if (skb == NULL) 11371da177e4SLinus Torvalds return -ENOMEM; 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds if (build_expire(skb, x, hard) < 0) 11401da177e4SLinus Torvalds BUG(); 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvalds NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE; 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_EXPIRE, GFP_ATOMIC); 11451da177e4SLinus Torvalds } 11461da177e4SLinus Torvalds 1147*26b15dadSJamal Hadi Salim static int xfrm_notify_sa_flush(struct km_event *c) 1148*26b15dadSJamal Hadi Salim { 1149*26b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 1150*26b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 1151*26b15dadSJamal Hadi Salim struct sk_buff *skb; 1152*26b15dadSJamal Hadi Salim unsigned char *b; 1153*26b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); 1154*26b15dadSJamal Hadi Salim 1155*26b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 1156*26b15dadSJamal Hadi Salim if (skb == NULL) 1157*26b15dadSJamal Hadi Salim return -ENOMEM; 1158*26b15dadSJamal Hadi Salim b = skb->tail; 1159*26b15dadSJamal Hadi Salim 1160*26b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, 1161*26b15dadSJamal Hadi Salim XFRM_MSG_FLUSHSA, sizeof(*p)); 1162*26b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 1163*26b15dadSJamal Hadi Salim 1164*26b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 1165*26b15dadSJamal Hadi Salim p->proto = c->data; 1166*26b15dadSJamal Hadi Salim 1167*26b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 1168*26b15dadSJamal Hadi Salim 1169*26b15dadSJamal Hadi Salim return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_SA, GFP_ATOMIC); 1170*26b15dadSJamal Hadi Salim 1171*26b15dadSJamal Hadi Salim nlmsg_failure: 1172*26b15dadSJamal Hadi Salim kfree_skb(skb); 1173*26b15dadSJamal Hadi Salim return -1; 1174*26b15dadSJamal Hadi Salim } 1175*26b15dadSJamal Hadi Salim 1176*26b15dadSJamal Hadi Salim static int inline xfrm_sa_len(struct xfrm_state *x) 1177*26b15dadSJamal Hadi Salim { 1178*26b15dadSJamal Hadi Salim int l = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info)); 1179*26b15dadSJamal Hadi Salim if (x->aalg) 1180*26b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); 1181*26b15dadSJamal Hadi Salim if (x->ealg) 1182*26b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); 1183*26b15dadSJamal Hadi Salim if (x->calg) 1184*26b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->calg)); 1185*26b15dadSJamal Hadi Salim if (x->encap) 1186*26b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->encap)); 1187*26b15dadSJamal Hadi Salim 1188*26b15dadSJamal Hadi Salim return l; 1189*26b15dadSJamal Hadi Salim } 1190*26b15dadSJamal Hadi Salim 1191*26b15dadSJamal Hadi Salim static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) 1192*26b15dadSJamal Hadi Salim { 1193*26b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 1194*26b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 1195*26b15dadSJamal Hadi Salim struct sk_buff *skb; 1196*26b15dadSJamal Hadi Salim u32 nlt; 1197*26b15dadSJamal Hadi Salim unsigned char *b; 1198*26b15dadSJamal Hadi Salim int len = xfrm_sa_len(x); 1199*26b15dadSJamal Hadi Salim 1200*26b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 1201*26b15dadSJamal Hadi Salim if (skb == NULL) 1202*26b15dadSJamal Hadi Salim return -ENOMEM; 1203*26b15dadSJamal Hadi Salim b = skb->tail; 1204*26b15dadSJamal Hadi Salim 1205*26b15dadSJamal Hadi Salim if (c->event == XFRM_SAP_ADDED) 1206*26b15dadSJamal Hadi Salim nlt = XFRM_MSG_NEWSA; 1207*26b15dadSJamal Hadi Salim else if (c->event == XFRM_SAP_UPDATED) 1208*26b15dadSJamal Hadi Salim nlt = XFRM_MSG_UPDSA; 1209*26b15dadSJamal Hadi Salim else if (c->event == XFRM_SAP_DELETED) 1210*26b15dadSJamal Hadi Salim nlt = XFRM_MSG_DELSA; 1211*26b15dadSJamal Hadi Salim else 1212*26b15dadSJamal Hadi Salim goto nlmsg_failure; 1213*26b15dadSJamal Hadi Salim 1214*26b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, nlt, sizeof(*p)); 1215*26b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 1216*26b15dadSJamal Hadi Salim 1217*26b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 1218*26b15dadSJamal Hadi Salim copy_to_user_state(x, p); 1219*26b15dadSJamal Hadi Salim 1220*26b15dadSJamal Hadi Salim if (x->aalg) 1221*26b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_AUTH, 1222*26b15dadSJamal Hadi Salim sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 1223*26b15dadSJamal Hadi Salim if (x->ealg) 1224*26b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_CRYPT, 1225*26b15dadSJamal Hadi Salim sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 1226*26b15dadSJamal Hadi Salim if (x->calg) 1227*26b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 1228*26b15dadSJamal Hadi Salim 1229*26b15dadSJamal Hadi Salim if (x->encap) 1230*26b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 1231*26b15dadSJamal Hadi Salim 1232*26b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 1233*26b15dadSJamal Hadi Salim 1234*26b15dadSJamal Hadi Salim return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_SA, GFP_ATOMIC); 1235*26b15dadSJamal Hadi Salim 1236*26b15dadSJamal Hadi Salim nlmsg_failure: 1237*26b15dadSJamal Hadi Salim rtattr_failure: 1238*26b15dadSJamal Hadi Salim kfree_skb(skb); 1239*26b15dadSJamal Hadi Salim return -1; 1240*26b15dadSJamal Hadi Salim } 1241*26b15dadSJamal Hadi Salim 1242*26b15dadSJamal Hadi Salim static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) 1243*26b15dadSJamal Hadi Salim { 1244*26b15dadSJamal Hadi Salim 1245*26b15dadSJamal Hadi Salim switch (c->event) { 1246*26b15dadSJamal Hadi Salim case XFRM_SAP_EXPIRED: 1247*26b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 1248*26b15dadSJamal Hadi Salim case XFRM_SAP_DELETED: 1249*26b15dadSJamal Hadi Salim case XFRM_SAP_UPDATED: 1250*26b15dadSJamal Hadi Salim case XFRM_SAP_ADDED: 1251*26b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 1252*26b15dadSJamal Hadi Salim case XFRM_SAP_FLUSHED: 1253*26b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 1254*26b15dadSJamal Hadi Salim default: 1255*26b15dadSJamal Hadi Salim printk("xfrm_user: Unknown SA event %d\n", c->event); 1256*26b15dadSJamal Hadi Salim break; 1257*26b15dadSJamal Hadi Salim } 1258*26b15dadSJamal Hadi Salim 1259*26b15dadSJamal Hadi Salim return 0; 1260*26b15dadSJamal Hadi Salim 1261*26b15dadSJamal Hadi Salim } 1262*26b15dadSJamal Hadi Salim 12631da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 12641da177e4SLinus Torvalds struct xfrm_tmpl *xt, struct xfrm_policy *xp, 12651da177e4SLinus Torvalds int dir) 12661da177e4SLinus Torvalds { 12671da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 12681da177e4SLinus Torvalds struct nlmsghdr *nlh; 12691da177e4SLinus Torvalds unsigned char *b = skb->tail; 12701da177e4SLinus Torvalds __u32 seq = xfrm_get_acqseq(); 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, 12731da177e4SLinus Torvalds sizeof(*ua)); 12741da177e4SLinus Torvalds ua = NLMSG_DATA(nlh); 12751da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 12761da177e4SLinus Torvalds 12771da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 12781da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 12791da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 12801da177e4SLinus Torvalds copy_to_user_policy(xp, &ua->policy, dir); 12811da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 12821da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 12831da177e4SLinus Torvalds ua->calgos = xt->calgos; 12841da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 12871da177e4SLinus Torvalds goto nlmsg_failure; 12881da177e4SLinus Torvalds 12891da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 12901da177e4SLinus Torvalds return skb->len; 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds nlmsg_failure: 12931da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 12941da177e4SLinus Torvalds return -1; 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds 12971da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 12981da177e4SLinus Torvalds struct xfrm_policy *xp, int dir) 12991da177e4SLinus Torvalds { 13001da177e4SLinus Torvalds struct sk_buff *skb; 13011da177e4SLinus Torvalds size_t len; 13021da177e4SLinus Torvalds 13031da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 13041da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); 13051da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 13061da177e4SLinus Torvalds if (skb == NULL) 13071da177e4SLinus Torvalds return -ENOMEM; 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds if (build_acquire(skb, x, xt, xp, dir) < 0) 13101da177e4SLinus Torvalds BUG(); 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvalds NETLINK_CB(skb).dst_groups = XFRMGRP_ACQUIRE; 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_ACQUIRE, GFP_ATOMIC); 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 13181da177e4SLinus Torvalds * or more templates. 13191da177e4SLinus Torvalds */ 13201da177e4SLinus Torvalds static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt, 13211da177e4SLinus Torvalds u8 *data, int len, int *dir) 13221da177e4SLinus Torvalds { 13231da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 13241da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 13251da177e4SLinus Torvalds struct xfrm_policy *xp; 13261da177e4SLinus Torvalds int nr; 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds switch (family) { 13291da177e4SLinus Torvalds case AF_INET: 13301da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 13311da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 13321da177e4SLinus Torvalds return NULL; 13331da177e4SLinus Torvalds } 13341da177e4SLinus Torvalds break; 13351da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 13361da177e4SLinus Torvalds case AF_INET6: 13371da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 13381da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 13391da177e4SLinus Torvalds return NULL; 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds break; 13421da177e4SLinus Torvalds #endif 13431da177e4SLinus Torvalds default: 13441da177e4SLinus Torvalds *dir = -EINVAL; 13451da177e4SLinus Torvalds return NULL; 13461da177e4SLinus Torvalds } 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds *dir = -EINVAL; 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds if (len < sizeof(*p) || 13511da177e4SLinus Torvalds verify_newpolicy_info(p)) 13521da177e4SLinus Torvalds return NULL; 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 13551da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 13561da177e4SLinus Torvalds return NULL; 13571da177e4SLinus Torvalds 13581da177e4SLinus Torvalds xp = xfrm_policy_alloc(GFP_KERNEL); 13591da177e4SLinus Torvalds if (xp == NULL) { 13601da177e4SLinus Torvalds *dir = -ENOBUFS; 13611da177e4SLinus Torvalds return NULL; 13621da177e4SLinus Torvalds } 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds copy_from_user_policy(xp, p); 13651da177e4SLinus Torvalds copy_templates(xp, ut, nr); 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvalds *dir = p->dir; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds return xp; 13701da177e4SLinus Torvalds } 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 13731da177e4SLinus Torvalds int dir, int hard) 13741da177e4SLinus Torvalds { 13751da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 13761da177e4SLinus Torvalds struct nlmsghdr *nlh; 13771da177e4SLinus Torvalds unsigned char *b = skb->tail; 13781da177e4SLinus Torvalds 13791da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); 13801da177e4SLinus Torvalds upe = NLMSG_DATA(nlh); 13811da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 13841da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 13851da177e4SLinus Torvalds goto nlmsg_failure; 13861da177e4SLinus Torvalds upe->hard = !!hard; 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 13891da177e4SLinus Torvalds return skb->len; 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvalds nlmsg_failure: 13921da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 13931da177e4SLinus Torvalds return -1; 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds 1396*26b15dadSJamal Hadi Salim static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 13971da177e4SLinus Torvalds { 13981da177e4SLinus Torvalds struct sk_buff *skb; 13991da177e4SLinus Torvalds size_t len; 14001da177e4SLinus Torvalds 14011da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 14021da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); 14031da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 14041da177e4SLinus Torvalds if (skb == NULL) 14051da177e4SLinus Torvalds return -ENOMEM; 14061da177e4SLinus Torvalds 1407*26b15dadSJamal Hadi Salim if (build_polexpire(skb, xp, dir, c->data) < 0) 14081da177e4SLinus Torvalds BUG(); 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE; 14111da177e4SLinus Torvalds 14121da177e4SLinus Torvalds return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_EXPIRE, GFP_ATOMIC); 14131da177e4SLinus Torvalds } 14141da177e4SLinus Torvalds 1415*26b15dadSJamal Hadi Salim static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) 1416*26b15dadSJamal Hadi Salim { 1417*26b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 1418*26b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 1419*26b15dadSJamal Hadi Salim struct sk_buff *skb; 1420*26b15dadSJamal Hadi Salim u32 nlt = 0 ; 1421*26b15dadSJamal Hadi Salim unsigned char *b; 1422*26b15dadSJamal Hadi Salim int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 1423*26b15dadSJamal Hadi Salim len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_info)); 1424*26b15dadSJamal Hadi Salim 1425*26b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 1426*26b15dadSJamal Hadi Salim if (skb == NULL) 1427*26b15dadSJamal Hadi Salim return -ENOMEM; 1428*26b15dadSJamal Hadi Salim b = skb->tail; 1429*26b15dadSJamal Hadi Salim 1430*26b15dadSJamal Hadi Salim if (c->event == XFRM_SAP_ADDED) 1431*26b15dadSJamal Hadi Salim nlt = XFRM_MSG_NEWPOLICY; 1432*26b15dadSJamal Hadi Salim else if (c->event == XFRM_SAP_UPDATED) 1433*26b15dadSJamal Hadi Salim nlt = XFRM_MSG_UPDPOLICY; 1434*26b15dadSJamal Hadi Salim else if (c->event == XFRM_SAP_DELETED) 1435*26b15dadSJamal Hadi Salim nlt = XFRM_MSG_DELPOLICY; 1436*26b15dadSJamal Hadi Salim else 1437*26b15dadSJamal Hadi Salim goto nlmsg_failure; 1438*26b15dadSJamal Hadi Salim 1439*26b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, nlt, sizeof(*p)); 1440*26b15dadSJamal Hadi Salim 1441*26b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 1442*26b15dadSJamal Hadi Salim 1443*26b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 1444*26b15dadSJamal Hadi Salim 1445*26b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 1446*26b15dadSJamal Hadi Salim if (copy_to_user_tmpl(xp, skb) < 0) 1447*26b15dadSJamal Hadi Salim goto nlmsg_failure; 1448*26b15dadSJamal Hadi Salim 1449*26b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 1450*26b15dadSJamal Hadi Salim 1451*26b15dadSJamal Hadi Salim return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_POLICY, GFP_ATOMIC); 1452*26b15dadSJamal Hadi Salim 1453*26b15dadSJamal Hadi Salim nlmsg_failure: 1454*26b15dadSJamal Hadi Salim kfree_skb(skb); 1455*26b15dadSJamal Hadi Salim return -1; 1456*26b15dadSJamal Hadi Salim } 1457*26b15dadSJamal Hadi Salim 1458*26b15dadSJamal Hadi Salim static int xfrm_notify_policy_flush(struct km_event *c) 1459*26b15dadSJamal Hadi Salim { 1460*26b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 1461*26b15dadSJamal Hadi Salim struct sk_buff *skb; 1462*26b15dadSJamal Hadi Salim unsigned char *b; 1463*26b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(0); 1464*26b15dadSJamal Hadi Salim 1465*26b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 1466*26b15dadSJamal Hadi Salim if (skb == NULL) 1467*26b15dadSJamal Hadi Salim return -ENOMEM; 1468*26b15dadSJamal Hadi Salim b = skb->tail; 1469*26b15dadSJamal Hadi Salim 1470*26b15dadSJamal Hadi Salim 1471*26b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); 1472*26b15dadSJamal Hadi Salim 1473*26b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 1474*26b15dadSJamal Hadi Salim 1475*26b15dadSJamal Hadi Salim return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_POLICY, GFP_ATOMIC); 1476*26b15dadSJamal Hadi Salim 1477*26b15dadSJamal Hadi Salim nlmsg_failure: 1478*26b15dadSJamal Hadi Salim kfree_skb(skb); 1479*26b15dadSJamal Hadi Salim return -1; 1480*26b15dadSJamal Hadi Salim } 1481*26b15dadSJamal Hadi Salim 1482*26b15dadSJamal Hadi Salim static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 1483*26b15dadSJamal Hadi Salim { 1484*26b15dadSJamal Hadi Salim 1485*26b15dadSJamal Hadi Salim switch (c->event) { 1486*26b15dadSJamal Hadi Salim case XFRM_SAP_ADDED: 1487*26b15dadSJamal Hadi Salim case XFRM_SAP_UPDATED: 1488*26b15dadSJamal Hadi Salim case XFRM_SAP_DELETED: 1489*26b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 1490*26b15dadSJamal Hadi Salim case XFRM_SAP_FLUSHED: 1491*26b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 1492*26b15dadSJamal Hadi Salim case XFRM_SAP_EXPIRED: 1493*26b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 1494*26b15dadSJamal Hadi Salim default: 1495*26b15dadSJamal Hadi Salim printk("xfrm_user: Unknown Policy event %d\n", c->event); 1496*26b15dadSJamal Hadi Salim } 1497*26b15dadSJamal Hadi Salim 1498*26b15dadSJamal Hadi Salim return 0; 1499*26b15dadSJamal Hadi Salim 1500*26b15dadSJamal Hadi Salim } 1501*26b15dadSJamal Hadi Salim 15021da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 15031da177e4SLinus Torvalds .id = "netlink", 15041da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 15051da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 15061da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 15071da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 15081da177e4SLinus Torvalds }; 15091da177e4SLinus Torvalds 15101da177e4SLinus Torvalds static int __init xfrm_user_init(void) 15111da177e4SLinus Torvalds { 15121da177e4SLinus Torvalds printk(KERN_INFO "Initializing IPsec netlink socket\n"); 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds xfrm_nl = netlink_kernel_create(NETLINK_XFRM, xfrm_netlink_rcv); 15151da177e4SLinus Torvalds if (xfrm_nl == NULL) 15161da177e4SLinus Torvalds return -ENOMEM; 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds xfrm_register_km(&netlink_mgr); 15191da177e4SLinus Torvalds 15201da177e4SLinus Torvalds return 0; 15211da177e4SLinus Torvalds } 15221da177e4SLinus Torvalds 15231da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 15241da177e4SLinus Torvalds { 15251da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 15261da177e4SLinus Torvalds sock_release(xfrm_nl->sk_socket); 15271da177e4SLinus Torvalds } 15281da177e4SLinus Torvalds 15291da177e4SLinus Torvalds module_init(xfrm_user_init); 15301da177e4SLinus Torvalds module_exit(xfrm_user_exit); 15311da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 1532