11da177e4SLinus Torvalds /* xfrm_user.c: User interface to configure xfrm engine. 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Copyright (C) 2002 David S. Miller (davem@redhat.com) 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Changes: 61da177e4SLinus Torvalds * Mitsuru KANDA @USAGI 71da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI 81da177e4SLinus Torvalds * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 91da177e4SLinus Torvalds * IPv6 support 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds #include <linux/module.h> 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/types.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/socket.h> 181da177e4SLinus Torvalds #include <linux/string.h> 191da177e4SLinus Torvalds #include <linux/net.h> 201da177e4SLinus Torvalds #include <linux/skbuff.h> 211da177e4SLinus Torvalds #include <linux/rtnetlink.h> 221da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 231da177e4SLinus Torvalds #include <linux/ipsec.h> 241da177e4SLinus Torvalds #include <linux/init.h> 251da177e4SLinus Torvalds #include <linux/security.h> 261da177e4SLinus Torvalds #include <net/sock.h> 271da177e4SLinus Torvalds #include <net/xfrm.h> 28*88fc2c84SThomas Graf #include <net/netlink.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 25272cb6962SHerbert Xu err = xfrm_init_state(x); 2531da177e4SLinus Torvalds if (err) 2541da177e4SLinus Torvalds goto error; 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds x->km.seq = p->seq; 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds return x; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds error: 2611da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 2621da177e4SLinus Torvalds xfrm_state_put(x); 2631da177e4SLinus Torvalds error_no_put: 2641da177e4SLinus Torvalds *errp = err; 2651da177e4SLinus Torvalds return NULL; 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 2691da177e4SLinus Torvalds { 2701da177e4SLinus Torvalds struct xfrm_usersa_info *p = NLMSG_DATA(nlh); 2711da177e4SLinus Torvalds struct xfrm_state *x; 2721da177e4SLinus Torvalds int err; 27326b15dadSJamal Hadi Salim struct km_event c; 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds err = verify_newsa_info(p, (struct rtattr **) xfrma); 2761da177e4SLinus Torvalds if (err) 2771da177e4SLinus Torvalds return err; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds x = xfrm_state_construct(p, (struct rtattr **) xfrma, &err); 2801da177e4SLinus Torvalds if (!x) 2811da177e4SLinus Torvalds return err; 2821da177e4SLinus Torvalds 28326b15dadSJamal Hadi Salim xfrm_state_hold(x); 2841da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 2851da177e4SLinus Torvalds err = xfrm_state_add(x); 2861da177e4SLinus Torvalds else 2871da177e4SLinus Torvalds err = xfrm_state_update(x); 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds if (err < 0) { 2901da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 2911da177e4SLinus Torvalds xfrm_state_put(x); 2927d6dfe1fSPatrick McHardy goto out; 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds 29526b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 29626b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 297f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 29826b15dadSJamal Hadi Salim 29926b15dadSJamal Hadi Salim km_state_notify(x, &c); 3007d6dfe1fSPatrick McHardy out: 30126b15dadSJamal Hadi Salim xfrm_state_put(x); 3021da177e4SLinus Torvalds return err; 3031da177e4SLinus Torvalds } 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 3061da177e4SLinus Torvalds { 3071da177e4SLinus Torvalds struct xfrm_state *x; 30826b15dadSJamal Hadi Salim int err; 30926b15dadSJamal Hadi Salim struct km_event c; 3101da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 3131da177e4SLinus Torvalds if (x == NULL) 3141da177e4SLinus Torvalds return -ESRCH; 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 3171da177e4SLinus Torvalds xfrm_state_put(x); 3181da177e4SLinus Torvalds return -EPERM; 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds 32126b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 32226b15dadSJamal Hadi Salim if (err < 0) { 32326b15dadSJamal Hadi Salim xfrm_state_put(x); 32426b15dadSJamal Hadi Salim return err; 32526b15dadSJamal Hadi Salim } 32626b15dadSJamal Hadi Salim 32726b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 32826b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 329f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 33026b15dadSJamal Hadi Salim km_state_notify(x, &c); 3311da177e4SLinus Torvalds xfrm_state_put(x); 3321da177e4SLinus Torvalds 33326b15dadSJamal Hadi Salim return err; 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 3371da177e4SLinus Torvalds { 3381da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 3391da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 3401da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 3411da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 3421da177e4SLinus Torvalds memcpy(&p->stats, &x->stats, sizeof(p->stats)); 3431da177e4SLinus Torvalds p->saddr = x->props.saddr; 3441da177e4SLinus Torvalds p->mode = x->props.mode; 3451da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 3461da177e4SLinus Torvalds p->reqid = x->props.reqid; 3471da177e4SLinus Torvalds p->family = x->props.family; 3481da177e4SLinus Torvalds p->flags = x->props.flags; 3491da177e4SLinus Torvalds p->seq = x->km.seq; 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds struct xfrm_dump_info { 3531da177e4SLinus Torvalds struct sk_buff *in_skb; 3541da177e4SLinus Torvalds struct sk_buff *out_skb; 3551da177e4SLinus Torvalds u32 nlmsg_seq; 3561da177e4SLinus Torvalds u16 nlmsg_flags; 3571da177e4SLinus Torvalds int start_idx; 3581da177e4SLinus Torvalds int this_idx; 3591da177e4SLinus Torvalds }; 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 3621da177e4SLinus Torvalds { 3631da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 3641da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 3651da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 3661da177e4SLinus Torvalds struct xfrm_usersa_info *p; 3671da177e4SLinus Torvalds struct nlmsghdr *nlh; 3681da177e4SLinus Torvalds unsigned char *b = skb->tail; 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 3711da177e4SLinus Torvalds goto out; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 3741da177e4SLinus Torvalds sp->nlmsg_seq, 3751da177e4SLinus Torvalds XFRM_MSG_NEWSA, sizeof(*p)); 3761da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 3791da177e4SLinus Torvalds copy_to_user_state(x, p); 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds if (x->aalg) 3821da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_AUTH, 3831da177e4SLinus Torvalds sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 3841da177e4SLinus Torvalds if (x->ealg) 3851da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_CRYPT, 3861da177e4SLinus Torvalds sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 3871da177e4SLinus Torvalds if (x->calg) 3881da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds if (x->encap) 3911da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 3941da177e4SLinus Torvalds out: 3951da177e4SLinus Torvalds sp->this_idx++; 3961da177e4SLinus Torvalds return 0; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds nlmsg_failure: 3991da177e4SLinus Torvalds rtattr_failure: 4001da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 4011da177e4SLinus Torvalds return -1; 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 4051da177e4SLinus Torvalds { 4061da177e4SLinus Torvalds struct xfrm_dump_info info; 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds info.in_skb = cb->skb; 4091da177e4SLinus Torvalds info.out_skb = skb; 4101da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 4111da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 4121da177e4SLinus Torvalds info.this_idx = 0; 4131da177e4SLinus Torvalds info.start_idx = cb->args[0]; 4141da177e4SLinus Torvalds (void) xfrm_state_walk(IPSEC_PROTO_ANY, dump_one_state, &info); 4151da177e4SLinus Torvalds cb->args[0] = info.this_idx; 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds return skb->len; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 4211da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 4221da177e4SLinus Torvalds { 4231da177e4SLinus Torvalds struct xfrm_dump_info info; 4241da177e4SLinus Torvalds struct sk_buff *skb; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 4271da177e4SLinus Torvalds if (!skb) 4281da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 4311da177e4SLinus Torvalds info.in_skb = in_skb; 4321da177e4SLinus Torvalds info.out_skb = skb; 4331da177e4SLinus Torvalds info.nlmsg_seq = seq; 4341da177e4SLinus Torvalds info.nlmsg_flags = 0; 4351da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds if (dump_one_state(x, 0, &info)) { 4381da177e4SLinus Torvalds kfree_skb(skb); 4391da177e4SLinus Torvalds return NULL; 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds return skb; 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 4461da177e4SLinus Torvalds { 4471da177e4SLinus Torvalds struct xfrm_usersa_id *p = NLMSG_DATA(nlh); 4481da177e4SLinus Torvalds struct xfrm_state *x; 4491da177e4SLinus Torvalds struct sk_buff *resp_skb; 4501da177e4SLinus Torvalds int err; 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); 4531da177e4SLinus Torvalds err = -ESRCH; 4541da177e4SLinus Torvalds if (x == NULL) 4551da177e4SLinus Torvalds goto out_noput; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 4581da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 4591da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 4601da177e4SLinus Torvalds } else { 4611da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 4621da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds xfrm_state_put(x); 4651da177e4SLinus Torvalds out_noput: 4661da177e4SLinus Torvalds return err; 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds static int verify_userspi_info(struct xfrm_userspi_info *p) 4701da177e4SLinus Torvalds { 4711da177e4SLinus Torvalds switch (p->info.id.proto) { 4721da177e4SLinus Torvalds case IPPROTO_AH: 4731da177e4SLinus Torvalds case IPPROTO_ESP: 4741da177e4SLinus Torvalds break; 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds case IPPROTO_COMP: 4771da177e4SLinus Torvalds /* IPCOMP spi is 16-bits. */ 4781da177e4SLinus Torvalds if (p->max >= 0x10000) 4791da177e4SLinus Torvalds return -EINVAL; 4801da177e4SLinus Torvalds break; 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds default: 4831da177e4SLinus Torvalds return -EINVAL; 4841da177e4SLinus Torvalds }; 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds if (p->min > p->max) 4871da177e4SLinus Torvalds return -EINVAL; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds return 0; 4901da177e4SLinus Torvalds } 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 4931da177e4SLinus Torvalds { 4941da177e4SLinus Torvalds struct xfrm_state *x; 4951da177e4SLinus Torvalds struct xfrm_userspi_info *p; 4961da177e4SLinus Torvalds struct sk_buff *resp_skb; 4971da177e4SLinus Torvalds xfrm_address_t *daddr; 4981da177e4SLinus Torvalds int family; 4991da177e4SLinus Torvalds int err; 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 5021da177e4SLinus Torvalds err = verify_userspi_info(p); 5031da177e4SLinus Torvalds if (err) 5041da177e4SLinus Torvalds goto out_noput; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds family = p->info.family; 5071da177e4SLinus Torvalds daddr = &p->info.id.daddr; 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds x = NULL; 5101da177e4SLinus Torvalds if (p->info.seq) { 5111da177e4SLinus Torvalds x = xfrm_find_acq_byseq(p->info.seq); 5121da177e4SLinus Torvalds if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { 5131da177e4SLinus Torvalds xfrm_state_put(x); 5141da177e4SLinus Torvalds x = NULL; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds if (!x) 5191da177e4SLinus Torvalds x = xfrm_find_acq(p->info.mode, p->info.reqid, 5201da177e4SLinus Torvalds p->info.id.proto, daddr, 5211da177e4SLinus Torvalds &p->info.saddr, 1, 5221da177e4SLinus Torvalds family); 5231da177e4SLinus Torvalds err = -ENOENT; 5241da177e4SLinus Torvalds if (x == NULL) 5251da177e4SLinus Torvalds goto out_noput; 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds resp_skb = ERR_PTR(-ENOENT); 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds spin_lock_bh(&x->lock); 5301da177e4SLinus Torvalds if (x->km.state != XFRM_STATE_DEAD) { 5311da177e4SLinus Torvalds xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); 5321da177e4SLinus Torvalds if (x->id.spi) 5331da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 5381da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 5391da177e4SLinus Torvalds goto out; 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 5431da177e4SLinus Torvalds NETLINK_CB(skb).pid, MSG_DONTWAIT); 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds out: 5461da177e4SLinus Torvalds xfrm_state_put(x); 5471da177e4SLinus Torvalds out_noput: 5481da177e4SLinus Torvalds return err; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds static int verify_policy_dir(__u8 dir) 5521da177e4SLinus Torvalds { 5531da177e4SLinus Torvalds switch (dir) { 5541da177e4SLinus Torvalds case XFRM_POLICY_IN: 5551da177e4SLinus Torvalds case XFRM_POLICY_OUT: 5561da177e4SLinus Torvalds case XFRM_POLICY_FWD: 5571da177e4SLinus Torvalds break; 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds default: 5601da177e4SLinus Torvalds return -EINVAL; 5611da177e4SLinus Torvalds }; 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds return 0; 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) 5671da177e4SLinus Torvalds { 5681da177e4SLinus Torvalds switch (p->share) { 5691da177e4SLinus Torvalds case XFRM_SHARE_ANY: 5701da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 5711da177e4SLinus Torvalds case XFRM_SHARE_USER: 5721da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 5731da177e4SLinus Torvalds break; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds default: 5761da177e4SLinus Torvalds return -EINVAL; 5771da177e4SLinus Torvalds }; 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds switch (p->action) { 5801da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 5811da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 5821da177e4SLinus Torvalds break; 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds default: 5851da177e4SLinus Torvalds return -EINVAL; 5861da177e4SLinus Torvalds }; 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds switch (p->sel.family) { 5891da177e4SLinus Torvalds case AF_INET: 5901da177e4SLinus Torvalds break; 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds case AF_INET6: 5931da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 5941da177e4SLinus Torvalds break; 5951da177e4SLinus Torvalds #else 5961da177e4SLinus Torvalds return -EAFNOSUPPORT; 5971da177e4SLinus Torvalds #endif 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds default: 6001da177e4SLinus Torvalds return -EINVAL; 6011da177e4SLinus Torvalds }; 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds return verify_policy_dir(p->dir); 6041da177e4SLinus Torvalds } 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 6071da177e4SLinus Torvalds int nr) 6081da177e4SLinus Torvalds { 6091da177e4SLinus Torvalds int i; 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds xp->xfrm_nr = nr; 6121da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 6131da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 6161da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 6171da177e4SLinus Torvalds sizeof(xfrm_address_t)); 6181da177e4SLinus Torvalds t->reqid = ut->reqid; 6191da177e4SLinus Torvalds t->mode = ut->mode; 6201da177e4SLinus Torvalds t->share = ut->share; 6211da177e4SLinus Torvalds t->optional = ut->optional; 6221da177e4SLinus Torvalds t->aalgos = ut->aalgos; 6231da177e4SLinus Torvalds t->ealgos = ut->ealgos; 6241da177e4SLinus Torvalds t->calgos = ut->calgos; 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds } 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds struct rtattr *rt = xfrma[XFRMA_TMPL-1]; 6311da177e4SLinus Torvalds struct xfrm_user_tmpl *utmpl; 6321da177e4SLinus Torvalds int nr; 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds if (!rt) { 6351da177e4SLinus Torvalds pol->xfrm_nr = 0; 6361da177e4SLinus Torvalds } else { 6371da177e4SLinus Torvalds nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 6401da177e4SLinus Torvalds return -EINVAL; 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds copy_templates(pol, RTA_DATA(rt), nr); 6431da177e4SLinus Torvalds } 6441da177e4SLinus Torvalds return 0; 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 6481da177e4SLinus Torvalds { 6491da177e4SLinus Torvalds xp->priority = p->priority; 6501da177e4SLinus Torvalds xp->index = p->index; 6511da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 6521da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 6531da177e4SLinus Torvalds xp->action = p->action; 6541da177e4SLinus Torvalds xp->flags = p->flags; 6551da177e4SLinus Torvalds xp->family = p->sel.family; 6561da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 6601da177e4SLinus Torvalds { 6611da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 6621da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 6631da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 6641da177e4SLinus Torvalds p->priority = xp->priority; 6651da177e4SLinus Torvalds p->index = xp->index; 6661da177e4SLinus Torvalds p->sel.family = xp->family; 6671da177e4SLinus Torvalds p->dir = dir; 6681da177e4SLinus Torvalds p->action = xp->action; 6691da177e4SLinus Torvalds p->flags = xp->flags; 6701da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 6711da177e4SLinus Torvalds } 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp) 6741da177e4SLinus Torvalds { 6751da177e4SLinus Torvalds struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); 6761da177e4SLinus Torvalds int err; 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds if (!xp) { 6791da177e4SLinus Torvalds *errp = -ENOMEM; 6801da177e4SLinus Torvalds return NULL; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds copy_from_user_policy(xp, p); 6841da177e4SLinus Torvalds err = copy_from_user_tmpl(xp, xfrma); 6851da177e4SLinus Torvalds if (err) { 6861da177e4SLinus Torvalds *errp = err; 6871da177e4SLinus Torvalds kfree(xp); 6881da177e4SLinus Torvalds xp = NULL; 6891da177e4SLinus Torvalds } 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds return xp; 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 6951da177e4SLinus Torvalds { 6961da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); 6971da177e4SLinus Torvalds struct xfrm_policy *xp; 69826b15dadSJamal Hadi Salim struct km_event c; 6991da177e4SLinus Torvalds int err; 7001da177e4SLinus Torvalds int excl; 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds err = verify_newpolicy_info(p); 7031da177e4SLinus Torvalds if (err) 7041da177e4SLinus Torvalds return err; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds xp = xfrm_policy_construct(p, (struct rtattr **) xfrma, &err); 7071da177e4SLinus Torvalds if (!xp) 7081da177e4SLinus Torvalds return err; 7091da177e4SLinus Torvalds 71026b15dadSJamal Hadi Salim /* shouldnt excl be based on nlh flags?? 71126b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 71226b15dadSJamal Hadi Salim * in netlink excl is a flag and you wouldnt need 71326b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 7141da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 7151da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 7161da177e4SLinus Torvalds if (err) { 7171da177e4SLinus Torvalds kfree(xp); 7181da177e4SLinus Torvalds return err; 7191da177e4SLinus Torvalds } 7201da177e4SLinus Torvalds 721f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 72226b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 72326b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 72426b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 72526b15dadSJamal Hadi Salim 7261da177e4SLinus Torvalds xfrm_pol_put(xp); 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds return 0; 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 7341da177e4SLinus Torvalds int i; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 7371da177e4SLinus Torvalds return 0; 7381da177e4SLinus Torvalds 7391da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 7401da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 7411da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 7441da177e4SLinus Torvalds up->family = xp->family; 7451da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 7461da177e4SLinus Torvalds up->reqid = kp->reqid; 7471da177e4SLinus Torvalds up->mode = kp->mode; 7481da177e4SLinus Torvalds up->share = kp->share; 7491da177e4SLinus Torvalds up->optional = kp->optional; 7501da177e4SLinus Torvalds up->aalgos = kp->aalgos; 7511da177e4SLinus Torvalds up->ealgos = kp->ealgos; 7521da177e4SLinus Torvalds up->calgos = kp->calgos; 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds RTA_PUT(skb, XFRMA_TMPL, 7551da177e4SLinus Torvalds (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), 7561da177e4SLinus Torvalds vec); 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvalds return 0; 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds rtattr_failure: 7611da177e4SLinus Torvalds return -1; 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 7651da177e4SLinus Torvalds { 7661da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 7671da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 7681da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 7691da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 7701da177e4SLinus Torvalds struct nlmsghdr *nlh; 7711da177e4SLinus Torvalds unsigned char *b = skb->tail; 7721da177e4SLinus Torvalds 7731da177e4SLinus Torvalds if (sp->this_idx < sp->start_idx) 7741da177e4SLinus Torvalds goto out; 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, 7771da177e4SLinus Torvalds sp->nlmsg_seq, 7781da177e4SLinus Torvalds XFRM_MSG_NEWPOLICY, sizeof(*p)); 7791da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 7801da177e4SLinus Torvalds nlh->nlmsg_flags = sp->nlmsg_flags; 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 7831da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 7841da177e4SLinus Torvalds goto nlmsg_failure; 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 7871da177e4SLinus Torvalds out: 7881da177e4SLinus Torvalds sp->this_idx++; 7891da177e4SLinus Torvalds return 0; 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds nlmsg_failure: 7921da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 7931da177e4SLinus Torvalds return -1; 7941da177e4SLinus Torvalds } 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 7971da177e4SLinus Torvalds { 7981da177e4SLinus Torvalds struct xfrm_dump_info info; 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds info.in_skb = cb->skb; 8011da177e4SLinus Torvalds info.out_skb = skb; 8021da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 8031da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 8041da177e4SLinus Torvalds info.this_idx = 0; 8051da177e4SLinus Torvalds info.start_idx = cb->args[0]; 8061da177e4SLinus Torvalds (void) xfrm_policy_walk(dump_one_policy, &info); 8071da177e4SLinus Torvalds cb->args[0] = info.this_idx; 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds return skb->len; 8101da177e4SLinus Torvalds } 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 8131da177e4SLinus Torvalds struct xfrm_policy *xp, 8141da177e4SLinus Torvalds int dir, u32 seq) 8151da177e4SLinus Torvalds { 8161da177e4SLinus Torvalds struct xfrm_dump_info info; 8171da177e4SLinus Torvalds struct sk_buff *skb; 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 8201da177e4SLinus Torvalds if (!skb) 8211da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid; 8241da177e4SLinus Torvalds info.in_skb = in_skb; 8251da177e4SLinus Torvalds info.out_skb = skb; 8261da177e4SLinus Torvalds info.nlmsg_seq = seq; 8271da177e4SLinus Torvalds info.nlmsg_flags = 0; 8281da177e4SLinus Torvalds info.this_idx = info.start_idx = 0; 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds if (dump_one_policy(xp, dir, 0, &info) < 0) { 8311da177e4SLinus Torvalds kfree_skb(skb); 8321da177e4SLinus Torvalds return NULL; 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds return skb; 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 8391da177e4SLinus Torvalds { 8401da177e4SLinus Torvalds struct xfrm_policy *xp; 8411da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 8421da177e4SLinus Torvalds int err; 84326b15dadSJamal Hadi Salim struct km_event c; 8441da177e4SLinus Torvalds int delete; 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds p = NLMSG_DATA(nlh); 8471da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds err = verify_policy_dir(p->dir); 8501da177e4SLinus Torvalds if (err) 8511da177e4SLinus Torvalds return err; 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds if (p->index) 8541da177e4SLinus Torvalds xp = xfrm_policy_byid(p->dir, p->index, delete); 8551da177e4SLinus Torvalds else 8561da177e4SLinus Torvalds xp = xfrm_policy_bysel(p->dir, &p->sel, delete); 8571da177e4SLinus Torvalds if (xp == NULL) 8581da177e4SLinus Torvalds return -ENOENT; 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds if (!delete) { 8611da177e4SLinus Torvalds struct sk_buff *resp_skb; 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 8641da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 8651da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 8661da177e4SLinus Torvalds } else { 8671da177e4SLinus Torvalds err = netlink_unicast(xfrm_nl, resp_skb, 8681da177e4SLinus Torvalds NETLINK_CB(skb).pid, 8691da177e4SLinus Torvalds MSG_DONTWAIT); 8701da177e4SLinus Torvalds } 87126b15dadSJamal Hadi Salim } else { 872e7443892SHerbert Xu c.data.byid = p->index; 873f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 87426b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 87526b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 87626b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds xfrm_pol_put(xp); 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds return err; 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 8851da177e4SLinus Torvalds { 88626b15dadSJamal Hadi Salim struct km_event c; 8871da177e4SLinus Torvalds struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds xfrm_state_flush(p->proto); 890bf08867fSHerbert Xu c.data.proto = p->proto; 891f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 89226b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 89326b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 89426b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 89526b15dadSJamal Hadi Salim 8961da177e4SLinus Torvalds return 0; 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds 8991da177e4SLinus Torvalds static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma) 9001da177e4SLinus Torvalds { 90126b15dadSJamal Hadi Salim struct km_event c; 90226b15dadSJamal Hadi Salim 9031da177e4SLinus Torvalds xfrm_policy_flush(); 904f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 90526b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 90626b15dadSJamal Hadi Salim c.pid = nlh->nlmsg_pid; 90726b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 9081da177e4SLinus Torvalds return 0; 9091da177e4SLinus Torvalds } 9101da177e4SLinus Torvalds 911492b558bSThomas Graf #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) 912492b558bSThomas Graf 913492b558bSThomas Graf static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 914492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 915492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 916492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 917492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 918492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 919492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 920492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 921492b558bSThomas Graf [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 922492b558bSThomas Graf [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 923492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 924492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 925492b558bSThomas Graf [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 926492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 927492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), 9281da177e4SLinus Torvalds }; 9291da177e4SLinus Torvalds 930492b558bSThomas Graf #undef XMSGSIZE 931492b558bSThomas Graf 9321da177e4SLinus Torvalds static struct xfrm_link { 9331da177e4SLinus Torvalds int (*doit)(struct sk_buff *, struct nlmsghdr *, void **); 9341da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 935492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 936492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 937492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 938492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 939492b558bSThomas Graf .dump = xfrm_dump_sa }, 940492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 941492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 942492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 943492b558bSThomas Graf .dump = xfrm_dump_policy }, 944492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 945492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 946492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 947492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 948492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 9491da177e4SLinus Torvalds }; 9501da177e4SLinus Torvalds 9511da177e4SLinus Torvalds static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp) 9521da177e4SLinus Torvalds { 9531da177e4SLinus Torvalds struct rtattr *xfrma[XFRMA_MAX]; 9541da177e4SLinus Torvalds struct xfrm_link *link; 9551da177e4SLinus Torvalds int type, min_len; 9561da177e4SLinus Torvalds 9571da177e4SLinus Torvalds if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) 9581da177e4SLinus Torvalds return 0; 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds type = nlh->nlmsg_type; 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds /* A control message: ignore them */ 9631da177e4SLinus Torvalds if (type < XFRM_MSG_BASE) 9641da177e4SLinus Torvalds return 0; 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds /* Unknown message: reply with EINVAL */ 9671da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 9681da177e4SLinus Torvalds goto err_einval; 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 9711da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds /* All operations require privileges, even GET */ 9741da177e4SLinus Torvalds if (security_netlink_recv(skb)) { 9751da177e4SLinus Torvalds *errp = -EPERM; 9761da177e4SLinus Torvalds return -1; 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds 979492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 980492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 981492b558bSThomas Graf (nlh->nlmsg_flags & NLM_F_DUMP)) { 9821da177e4SLinus Torvalds if (link->dump == NULL) 9831da177e4SLinus Torvalds goto err_einval; 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh, 986a8f74b22SThomas Graf link->dump, NULL)) != 0) { 9871da177e4SLinus Torvalds return -1; 9881da177e4SLinus Torvalds } 989*88fc2c84SThomas Graf 990*88fc2c84SThomas Graf netlink_queue_skip(nlh, skb); 9911da177e4SLinus Torvalds return -1; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds memset(xfrma, 0, sizeof(xfrma)); 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) 9971da177e4SLinus Torvalds goto err_einval; 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds if (nlh->nlmsg_len > min_len) { 10001da177e4SLinus Torvalds int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 10011da177e4SLinus Torvalds struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); 10021da177e4SLinus Torvalds 10031da177e4SLinus Torvalds while (RTA_OK(attr, attrlen)) { 10041da177e4SLinus Torvalds unsigned short flavor = attr->rta_type; 10051da177e4SLinus Torvalds if (flavor) { 10061da177e4SLinus Torvalds if (flavor > XFRMA_MAX) 10071da177e4SLinus Torvalds goto err_einval; 10081da177e4SLinus Torvalds xfrma[flavor - 1] = attr; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds attr = RTA_NEXT(attr, attrlen); 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds if (link->doit == NULL) 10151da177e4SLinus Torvalds goto err_einval; 10161da177e4SLinus Torvalds *errp = link->doit(skb, nlh, (void **) &xfrma); 10171da177e4SLinus Torvalds 10181da177e4SLinus Torvalds return *errp; 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds err_einval: 10211da177e4SLinus Torvalds *errp = -EINVAL; 10221da177e4SLinus Torvalds return -1; 10231da177e4SLinus Torvalds } 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds static void xfrm_netlink_rcv(struct sock *sk, int len) 10261da177e4SLinus Torvalds { 1027*88fc2c84SThomas Graf unsigned int qlen = 0; 10282a0a6ebeSHerbert Xu 10291da177e4SLinus Torvalds do { 10301da177e4SLinus Torvalds down(&xfrm_cfg_sem); 1031*88fc2c84SThomas Graf netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); 10321da177e4SLinus Torvalds up(&xfrm_cfg_sem); 10331da177e4SLinus Torvalds 10342a0a6ebeSHerbert Xu } while (qlen); 10351da177e4SLinus Torvalds } 10361da177e4SLinus Torvalds 10371da177e4SLinus Torvalds static int build_expire(struct sk_buff *skb, struct xfrm_state *x, int hard) 10381da177e4SLinus Torvalds { 10391da177e4SLinus Torvalds struct xfrm_user_expire *ue; 10401da177e4SLinus Torvalds struct nlmsghdr *nlh; 10411da177e4SLinus Torvalds unsigned char *b = skb->tail; 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_EXPIRE, 10441da177e4SLinus Torvalds sizeof(*ue)); 10451da177e4SLinus Torvalds ue = NLMSG_DATA(nlh); 10461da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 10491da177e4SLinus Torvalds ue->hard = (hard != 0) ? 1 : 0; 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 10521da177e4SLinus Torvalds return skb->len; 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds nlmsg_failure: 10551da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 10561da177e4SLinus Torvalds return -1; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 105926b15dadSJamal Hadi Salim static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds struct sk_buff *skb; 1062ee57eef9SJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); 10631da177e4SLinus Torvalds 1064ee57eef9SJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 10651da177e4SLinus Torvalds if (skb == NULL) 10661da177e4SLinus Torvalds return -ENOMEM; 10671da177e4SLinus Torvalds 1068bf08867fSHerbert Xu if (build_expire(skb, x, c->data.hard) < 0) 10691da177e4SLinus Torvalds BUG(); 10701da177e4SLinus Torvalds 1071ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; 1072ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 107526b15dadSJamal Hadi Salim static int xfrm_notify_sa_flush(struct km_event *c) 107626b15dadSJamal Hadi Salim { 107726b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 107826b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 107926b15dadSJamal Hadi Salim struct sk_buff *skb; 108026b15dadSJamal Hadi Salim unsigned char *b; 108126b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); 108226b15dadSJamal Hadi Salim 108326b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 108426b15dadSJamal Hadi Salim if (skb == NULL) 108526b15dadSJamal Hadi Salim return -ENOMEM; 108626b15dadSJamal Hadi Salim b = skb->tail; 108726b15dadSJamal Hadi Salim 108826b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, 108926b15dadSJamal Hadi Salim XFRM_MSG_FLUSHSA, sizeof(*p)); 109026b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 109126b15dadSJamal Hadi Salim 109226b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 1093bf08867fSHerbert Xu p->proto = c->data.proto; 109426b15dadSJamal Hadi Salim 109526b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 109626b15dadSJamal Hadi Salim 1097ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; 1098ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); 109926b15dadSJamal Hadi Salim 110026b15dadSJamal Hadi Salim nlmsg_failure: 110126b15dadSJamal Hadi Salim kfree_skb(skb); 110226b15dadSJamal Hadi Salim return -1; 110326b15dadSJamal Hadi Salim } 110426b15dadSJamal Hadi Salim 110526b15dadSJamal Hadi Salim static int inline xfrm_sa_len(struct xfrm_state *x) 110626b15dadSJamal Hadi Salim { 11070603eac0SHerbert Xu int l = 0; 110826b15dadSJamal Hadi Salim if (x->aalg) 110926b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); 111026b15dadSJamal Hadi Salim if (x->ealg) 111126b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); 111226b15dadSJamal Hadi Salim if (x->calg) 111326b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->calg)); 111426b15dadSJamal Hadi Salim if (x->encap) 111526b15dadSJamal Hadi Salim l += RTA_SPACE(sizeof(*x->encap)); 111626b15dadSJamal Hadi Salim 111726b15dadSJamal Hadi Salim return l; 111826b15dadSJamal Hadi Salim } 111926b15dadSJamal Hadi Salim 112026b15dadSJamal Hadi Salim static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) 112126b15dadSJamal Hadi Salim { 112226b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 11230603eac0SHerbert Xu struct xfrm_usersa_id *id; 112426b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 112526b15dadSJamal Hadi Salim struct sk_buff *skb; 112626b15dadSJamal Hadi Salim unsigned char *b; 112726b15dadSJamal Hadi Salim int len = xfrm_sa_len(x); 11280603eac0SHerbert Xu int headlen; 11290603eac0SHerbert Xu 11300603eac0SHerbert Xu headlen = sizeof(*p); 11310603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 11320603eac0SHerbert Xu len += RTA_SPACE(headlen); 11330603eac0SHerbert Xu headlen = sizeof(*id); 11340603eac0SHerbert Xu } 11350603eac0SHerbert Xu len += NLMSG_SPACE(headlen); 113626b15dadSJamal Hadi Salim 113726b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 113826b15dadSJamal Hadi Salim if (skb == NULL) 113926b15dadSJamal Hadi Salim return -ENOMEM; 114026b15dadSJamal Hadi Salim b = skb->tail; 114126b15dadSJamal Hadi Salim 11420603eac0SHerbert Xu nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); 114326b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 114426b15dadSJamal Hadi Salim 114526b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 11460603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 11470603eac0SHerbert Xu id = NLMSG_DATA(nlh); 11480603eac0SHerbert Xu memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); 11490603eac0SHerbert Xu id->spi = x->id.spi; 11500603eac0SHerbert Xu id->family = x->props.family; 11510603eac0SHerbert Xu id->proto = x->id.proto; 11520603eac0SHerbert Xu 11530603eac0SHerbert Xu p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); 11540603eac0SHerbert Xu } 11550603eac0SHerbert Xu 115626b15dadSJamal Hadi Salim copy_to_user_state(x, p); 115726b15dadSJamal Hadi Salim 115826b15dadSJamal Hadi Salim if (x->aalg) 115926b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_AUTH, 116026b15dadSJamal Hadi Salim sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); 116126b15dadSJamal Hadi Salim if (x->ealg) 116226b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_CRYPT, 116326b15dadSJamal Hadi Salim sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); 116426b15dadSJamal Hadi Salim if (x->calg) 116526b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 116626b15dadSJamal Hadi Salim 116726b15dadSJamal Hadi Salim if (x->encap) 116826b15dadSJamal Hadi Salim RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 116926b15dadSJamal Hadi Salim 117026b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 117126b15dadSJamal Hadi Salim 1172ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; 1173ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); 117426b15dadSJamal Hadi Salim 117526b15dadSJamal Hadi Salim nlmsg_failure: 117626b15dadSJamal Hadi Salim rtattr_failure: 117726b15dadSJamal Hadi Salim kfree_skb(skb); 117826b15dadSJamal Hadi Salim return -1; 117926b15dadSJamal Hadi Salim } 118026b15dadSJamal Hadi Salim 118126b15dadSJamal Hadi Salim static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) 118226b15dadSJamal Hadi Salim { 118326b15dadSJamal Hadi Salim 118426b15dadSJamal Hadi Salim switch (c->event) { 1185f60f6b8fSHerbert Xu case XFRM_MSG_EXPIRE: 118626b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 1187f60f6b8fSHerbert Xu case XFRM_MSG_DELSA: 1188f60f6b8fSHerbert Xu case XFRM_MSG_UPDSA: 1189f60f6b8fSHerbert Xu case XFRM_MSG_NEWSA: 119026b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 1191f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHSA: 119226b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 119326b15dadSJamal Hadi Salim default: 119426b15dadSJamal Hadi Salim printk("xfrm_user: Unknown SA event %d\n", c->event); 119526b15dadSJamal Hadi Salim break; 119626b15dadSJamal Hadi Salim } 119726b15dadSJamal Hadi Salim 119826b15dadSJamal Hadi Salim return 0; 119926b15dadSJamal Hadi Salim 120026b15dadSJamal Hadi Salim } 120126b15dadSJamal Hadi Salim 12021da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 12031da177e4SLinus Torvalds struct xfrm_tmpl *xt, struct xfrm_policy *xp, 12041da177e4SLinus Torvalds int dir) 12051da177e4SLinus Torvalds { 12061da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 12071da177e4SLinus Torvalds struct nlmsghdr *nlh; 12081da177e4SLinus Torvalds unsigned char *b = skb->tail; 12091da177e4SLinus Torvalds __u32 seq = xfrm_get_acqseq(); 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, 12121da177e4SLinus Torvalds sizeof(*ua)); 12131da177e4SLinus Torvalds ua = NLMSG_DATA(nlh); 12141da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 12151da177e4SLinus Torvalds 12161da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 12171da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 12181da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 12191da177e4SLinus Torvalds copy_to_user_policy(xp, &ua->policy, dir); 12201da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 12211da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 12221da177e4SLinus Torvalds ua->calgos = xt->calgos; 12231da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 12241da177e4SLinus Torvalds 12251da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 12261da177e4SLinus Torvalds goto nlmsg_failure; 12271da177e4SLinus Torvalds 12281da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 12291da177e4SLinus Torvalds return skb->len; 12301da177e4SLinus Torvalds 12311da177e4SLinus Torvalds nlmsg_failure: 12321da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 12331da177e4SLinus Torvalds return -1; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 12371da177e4SLinus Torvalds struct xfrm_policy *xp, int dir) 12381da177e4SLinus Torvalds { 12391da177e4SLinus Torvalds struct sk_buff *skb; 12401da177e4SLinus Torvalds size_t len; 12411da177e4SLinus Torvalds 12421da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 12431da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); 12441da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 12451da177e4SLinus Torvalds if (skb == NULL) 12461da177e4SLinus Torvalds return -ENOMEM; 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds if (build_acquire(skb, x, xt, xp, dir) < 0) 12491da177e4SLinus Torvalds BUG(); 12501da177e4SLinus Torvalds 1251ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; 1252ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); 12531da177e4SLinus Torvalds } 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 12561da177e4SLinus Torvalds * or more templates. 12571da177e4SLinus Torvalds */ 12581da177e4SLinus Torvalds static struct xfrm_policy *xfrm_compile_policy(u16 family, int opt, 12591da177e4SLinus Torvalds u8 *data, int len, int *dir) 12601da177e4SLinus Torvalds { 12611da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 12621da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 12631da177e4SLinus Torvalds struct xfrm_policy *xp; 12641da177e4SLinus Torvalds int nr; 12651da177e4SLinus Torvalds 12661da177e4SLinus Torvalds switch (family) { 12671da177e4SLinus Torvalds case AF_INET: 12681da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 12691da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 12701da177e4SLinus Torvalds return NULL; 12711da177e4SLinus Torvalds } 12721da177e4SLinus Torvalds break; 12731da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 12741da177e4SLinus Torvalds case AF_INET6: 12751da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 12761da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 12771da177e4SLinus Torvalds return NULL; 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds break; 12801da177e4SLinus Torvalds #endif 12811da177e4SLinus Torvalds default: 12821da177e4SLinus Torvalds *dir = -EINVAL; 12831da177e4SLinus Torvalds return NULL; 12841da177e4SLinus Torvalds } 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds *dir = -EINVAL; 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds if (len < sizeof(*p) || 12891da177e4SLinus Torvalds verify_newpolicy_info(p)) 12901da177e4SLinus Torvalds return NULL; 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 12931da177e4SLinus Torvalds if (nr > XFRM_MAX_DEPTH) 12941da177e4SLinus Torvalds return NULL; 12951da177e4SLinus Torvalds 1296a4f1bac6SHerbert Xu if (p->dir > XFRM_POLICY_OUT) 1297a4f1bac6SHerbert Xu return NULL; 1298a4f1bac6SHerbert Xu 12991da177e4SLinus Torvalds xp = xfrm_policy_alloc(GFP_KERNEL); 13001da177e4SLinus Torvalds if (xp == NULL) { 13011da177e4SLinus Torvalds *dir = -ENOBUFS; 13021da177e4SLinus Torvalds return NULL; 13031da177e4SLinus Torvalds } 13041da177e4SLinus Torvalds 13051da177e4SLinus Torvalds copy_from_user_policy(xp, p); 13061da177e4SLinus Torvalds copy_templates(xp, ut, nr); 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds *dir = p->dir; 13091da177e4SLinus Torvalds 13101da177e4SLinus Torvalds return xp; 13111da177e4SLinus Torvalds } 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 13141da177e4SLinus Torvalds int dir, int hard) 13151da177e4SLinus Torvalds { 13161da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 13171da177e4SLinus Torvalds struct nlmsghdr *nlh; 13181da177e4SLinus Torvalds unsigned char *b = skb->tail; 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); 13211da177e4SLinus Torvalds upe = NLMSG_DATA(nlh); 13221da177e4SLinus Torvalds nlh->nlmsg_flags = 0; 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 13251da177e4SLinus Torvalds if (copy_to_user_tmpl(xp, skb) < 0) 13261da177e4SLinus Torvalds goto nlmsg_failure; 13271da177e4SLinus Torvalds upe->hard = !!hard; 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds nlh->nlmsg_len = skb->tail - b; 13301da177e4SLinus Torvalds return skb->len; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds nlmsg_failure: 13331da177e4SLinus Torvalds skb_trim(skb, b - skb->data); 13341da177e4SLinus Torvalds return -1; 13351da177e4SLinus Torvalds } 13361da177e4SLinus Torvalds 133726b15dadSJamal Hadi Salim static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 13381da177e4SLinus Torvalds { 13391da177e4SLinus Torvalds struct sk_buff *skb; 13401da177e4SLinus Torvalds size_t len; 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 13431da177e4SLinus Torvalds len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); 13441da177e4SLinus Torvalds skb = alloc_skb(len, GFP_ATOMIC); 13451da177e4SLinus Torvalds if (skb == NULL) 13461da177e4SLinus Torvalds return -ENOMEM; 13471da177e4SLinus Torvalds 1348bf08867fSHerbert Xu if (build_polexpire(skb, xp, dir, c->data.hard) < 0) 13491da177e4SLinus Torvalds BUG(); 13501da177e4SLinus Torvalds 1351ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; 1352ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); 13531da177e4SLinus Torvalds } 13541da177e4SLinus Torvalds 135526b15dadSJamal Hadi Salim static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) 135626b15dadSJamal Hadi Salim { 135726b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 13580603eac0SHerbert Xu struct xfrm_userpolicy_id *id; 135926b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 136026b15dadSJamal Hadi Salim struct sk_buff *skb; 136126b15dadSJamal Hadi Salim unsigned char *b; 136226b15dadSJamal Hadi Salim int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 13630603eac0SHerbert Xu int headlen; 13640603eac0SHerbert Xu 13650603eac0SHerbert Xu headlen = sizeof(*p); 13660603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 13670603eac0SHerbert Xu len += RTA_SPACE(headlen); 13680603eac0SHerbert Xu headlen = sizeof(*id); 13690603eac0SHerbert Xu } 13700603eac0SHerbert Xu len += NLMSG_SPACE(headlen); 137126b15dadSJamal Hadi Salim 137226b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 137326b15dadSJamal Hadi Salim if (skb == NULL) 137426b15dadSJamal Hadi Salim return -ENOMEM; 137526b15dadSJamal Hadi Salim b = skb->tail; 137626b15dadSJamal Hadi Salim 13770603eac0SHerbert Xu nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); 137826b15dadSJamal Hadi Salim 137926b15dadSJamal Hadi Salim p = NLMSG_DATA(nlh); 13800603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 13810603eac0SHerbert Xu id = NLMSG_DATA(nlh); 13820603eac0SHerbert Xu memset(id, 0, sizeof(*id)); 13830603eac0SHerbert Xu id->dir = dir; 13840603eac0SHerbert Xu if (c->data.byid) 13850603eac0SHerbert Xu id->index = xp->index; 13860603eac0SHerbert Xu else 13870603eac0SHerbert Xu memcpy(&id->sel, &xp->selector, sizeof(id->sel)); 13880603eac0SHerbert Xu 13890603eac0SHerbert Xu p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); 13900603eac0SHerbert Xu } 139126b15dadSJamal Hadi Salim 139226b15dadSJamal Hadi Salim nlh->nlmsg_flags = 0; 139326b15dadSJamal Hadi Salim 139426b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 139526b15dadSJamal Hadi Salim if (copy_to_user_tmpl(xp, skb) < 0) 139626b15dadSJamal Hadi Salim goto nlmsg_failure; 139726b15dadSJamal Hadi Salim 139826b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 139926b15dadSJamal Hadi Salim 1400ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; 1401ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); 140226b15dadSJamal Hadi Salim 140326b15dadSJamal Hadi Salim nlmsg_failure: 14040603eac0SHerbert Xu rtattr_failure: 140526b15dadSJamal Hadi Salim kfree_skb(skb); 140626b15dadSJamal Hadi Salim return -1; 140726b15dadSJamal Hadi Salim } 140826b15dadSJamal Hadi Salim 140926b15dadSJamal Hadi Salim static int xfrm_notify_policy_flush(struct km_event *c) 141026b15dadSJamal Hadi Salim { 141126b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 141226b15dadSJamal Hadi Salim struct sk_buff *skb; 141326b15dadSJamal Hadi Salim unsigned char *b; 141426b15dadSJamal Hadi Salim int len = NLMSG_LENGTH(0); 141526b15dadSJamal Hadi Salim 141626b15dadSJamal Hadi Salim skb = alloc_skb(len, GFP_ATOMIC); 141726b15dadSJamal Hadi Salim if (skb == NULL) 141826b15dadSJamal Hadi Salim return -ENOMEM; 141926b15dadSJamal Hadi Salim b = skb->tail; 142026b15dadSJamal Hadi Salim 142126b15dadSJamal Hadi Salim 142226b15dadSJamal Hadi Salim nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); 142326b15dadSJamal Hadi Salim 142426b15dadSJamal Hadi Salim nlh->nlmsg_len = skb->tail - b; 142526b15dadSJamal Hadi Salim 1426ac6d439dSPatrick McHardy NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; 1427ac6d439dSPatrick McHardy return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); 142826b15dadSJamal Hadi Salim 142926b15dadSJamal Hadi Salim nlmsg_failure: 143026b15dadSJamal Hadi Salim kfree_skb(skb); 143126b15dadSJamal Hadi Salim return -1; 143226b15dadSJamal Hadi Salim } 143326b15dadSJamal Hadi Salim 143426b15dadSJamal Hadi Salim static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) 143526b15dadSJamal Hadi Salim { 143626b15dadSJamal Hadi Salim 143726b15dadSJamal Hadi Salim switch (c->event) { 1438f60f6b8fSHerbert Xu case XFRM_MSG_NEWPOLICY: 1439f60f6b8fSHerbert Xu case XFRM_MSG_UPDPOLICY: 1440f60f6b8fSHerbert Xu case XFRM_MSG_DELPOLICY: 144126b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 1442f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHPOLICY: 144326b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 1444f60f6b8fSHerbert Xu case XFRM_MSG_POLEXPIRE: 144526b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 144626b15dadSJamal Hadi Salim default: 144726b15dadSJamal Hadi Salim printk("xfrm_user: Unknown Policy event %d\n", c->event); 144826b15dadSJamal Hadi Salim } 144926b15dadSJamal Hadi Salim 145026b15dadSJamal Hadi Salim return 0; 145126b15dadSJamal Hadi Salim 145226b15dadSJamal Hadi Salim } 145326b15dadSJamal Hadi Salim 14541da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 14551da177e4SLinus Torvalds .id = "netlink", 14561da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 14571da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 14581da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 14591da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 14601da177e4SLinus Torvalds }; 14611da177e4SLinus Torvalds 14621da177e4SLinus Torvalds static int __init xfrm_user_init(void) 14631da177e4SLinus Torvalds { 14641da177e4SLinus Torvalds printk(KERN_INFO "Initializing IPsec netlink socket\n"); 14651da177e4SLinus Torvalds 146606628607SPatrick McHardy xfrm_nl = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, 146706628607SPatrick McHardy xfrm_netlink_rcv, THIS_MODULE); 14681da177e4SLinus Torvalds if (xfrm_nl == NULL) 14691da177e4SLinus Torvalds return -ENOMEM; 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds xfrm_register_km(&netlink_mgr); 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds return 0; 14741da177e4SLinus Torvalds } 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 14771da177e4SLinus Torvalds { 14781da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 14791da177e4SLinus Torvalds sock_release(xfrm_nl->sk_socket); 14801da177e4SLinus Torvalds } 14811da177e4SLinus Torvalds 14821da177e4SLinus Torvalds module_init(xfrm_user_init); 14831da177e4SLinus Torvalds module_exit(xfrm_user_exit); 14841da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 14854fdb3bb7SHarald Welte MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); 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