11da177e4SLinus Torvalds /* xfrm_user.c: User interface to configure xfrm engine. 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Copyright (C) 2002 David S. Miller (davem@redhat.com) 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Changes: 61da177e4SLinus Torvalds * Mitsuru KANDA @USAGI 71da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI 81da177e4SLinus Torvalds * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 91da177e4SLinus Torvalds * IPv6 support 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 139409f38aSHerbert Xu #include <linux/crypto.h> 141da177e4SLinus Torvalds #include <linux/module.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/types.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/socket.h> 191da177e4SLinus Torvalds #include <linux/string.h> 201da177e4SLinus Torvalds #include <linux/net.h> 211da177e4SLinus Torvalds #include <linux/skbuff.h> 221da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 231da177e4SLinus Torvalds #include <linux/ipsec.h> 241da177e4SLinus Torvalds #include <linux/init.h> 251da177e4SLinus Torvalds #include <linux/security.h> 261da177e4SLinus Torvalds #include <net/sock.h> 271da177e4SLinus Torvalds #include <net/xfrm.h> 2888fc2c84SThomas Graf #include <net/netlink.h> 29fa6dd8a2SNicolas Dichtel #include <net/ah.h> 307c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 31dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 32e23c7194SMasahide NAKAMURA #include <linux/in6.h> 33e23c7194SMasahide NAKAMURA #endif 34e33d4f13SSowmini Varadhan #include <asm/unaligned.h> 351da177e4SLinus Torvalds 365424f32eSThomas Graf static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) 371da177e4SLinus Torvalds { 385424f32eSThomas Graf struct nlattr *rt = attrs[type]; 391da177e4SLinus Torvalds struct xfrm_algo *algp; 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds if (!rt) 421da177e4SLinus Torvalds return 0; 431da177e4SLinus Torvalds 445424f32eSThomas Graf algp = nla_data(rt); 4506cd22f8SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_alg_len(algp)) 4631c26852SHerbert Xu return -EINVAL; 4731c26852SHerbert Xu 481da177e4SLinus Torvalds switch (type) { 491da177e4SLinus Torvalds case XFRMA_ALG_AUTH: 501da177e4SLinus Torvalds case XFRMA_ALG_CRYPT: 511da177e4SLinus Torvalds case XFRMA_ALG_COMP: 521da177e4SLinus Torvalds break; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds default: 551da177e4SLinus Torvalds return -EINVAL; 563ff50b79SStephen Hemminger } 571da177e4SLinus Torvalds 58633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 591da177e4SLinus Torvalds return 0; 601da177e4SLinus Torvalds } 611da177e4SLinus Torvalds 624447bb33SMartin Willi static int verify_auth_trunc(struct nlattr **attrs) 634447bb33SMartin Willi { 644447bb33SMartin Willi struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; 654447bb33SMartin Willi struct xfrm_algo_auth *algp; 664447bb33SMartin Willi 674447bb33SMartin Willi if (!rt) 684447bb33SMartin Willi return 0; 694447bb33SMartin Willi 704447bb33SMartin Willi algp = nla_data(rt); 711bd963a7SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_alg_auth_len(algp)) 724447bb33SMartin Willi return -EINVAL; 734447bb33SMartin Willi 74633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 754447bb33SMartin Willi return 0; 764447bb33SMartin Willi } 774447bb33SMartin Willi 781a6509d9SHerbert Xu static int verify_aead(struct nlattr **attrs) 791a6509d9SHerbert Xu { 801a6509d9SHerbert Xu struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; 811a6509d9SHerbert Xu struct xfrm_algo_aead *algp; 821a6509d9SHerbert Xu 831a6509d9SHerbert Xu if (!rt) 841a6509d9SHerbert Xu return 0; 851a6509d9SHerbert Xu 861a6509d9SHerbert Xu algp = nla_data(rt); 87373b8eebSAlexey Dobriyan if (nla_len(rt) < (int)aead_len(algp)) 881a6509d9SHerbert Xu return -EINVAL; 891a6509d9SHerbert Xu 90633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 911a6509d9SHerbert Xu return 0; 921a6509d9SHerbert Xu } 931a6509d9SHerbert Xu 945424f32eSThomas Graf static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, 95eb2971b6SMasahide NAKAMURA xfrm_address_t **addrp) 96eb2971b6SMasahide NAKAMURA { 975424f32eSThomas Graf struct nlattr *rt = attrs[type]; 98eb2971b6SMasahide NAKAMURA 99cf5cb79fSThomas Graf if (rt && addrp) 1005424f32eSThomas Graf *addrp = nla_data(rt); 101eb2971b6SMasahide NAKAMURA } 102df71837dSTrent Jaeger 1035424f32eSThomas Graf static inline int verify_sec_ctx_len(struct nlattr **attrs) 104df71837dSTrent Jaeger { 1055424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 106df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 107df71837dSTrent Jaeger 108df71837dSTrent Jaeger if (!rt) 109df71837dSTrent Jaeger return 0; 110df71837dSTrent Jaeger 1115424f32eSThomas Graf uctx = nla_data(rt); 112cf5cb79fSThomas Graf if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) 113df71837dSTrent Jaeger return -EINVAL; 114df71837dSTrent Jaeger 115df71837dSTrent Jaeger return 0; 116df71837dSTrent Jaeger } 117df71837dSTrent Jaeger 118d8647b79SSteffen Klassert static inline int verify_replay(struct xfrm_usersa_info *p, 119d8647b79SSteffen Klassert struct nlattr **attrs) 120d8647b79SSteffen Klassert { 121d8647b79SSteffen Klassert struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; 122ecd79187SMathias Krause struct xfrm_replay_state_esn *rs; 123d8647b79SSteffen Klassert 124ecd79187SMathias Krause if (!rt) 125d97ca5d7SFlorian Westphal return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0; 1267833aa05SSteffen Klassert 127ecd79187SMathias Krause rs = nla_data(rt); 128ecd79187SMathias Krause 129ecd79187SMathias Krause if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) 130ecd79187SMathias Krause return -EINVAL; 131ecd79187SMathias Krause 1325e708e47SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) && 133ecd79187SMathias Krause nla_len(rt) != sizeof(*rs)) 134ecd79187SMathias Krause return -EINVAL; 135d8647b79SSteffen Klassert 13601714109SFan Du /* As only ESP and AH support ESN feature. */ 13701714109SFan Du if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) 13802aadf72SSteffen Klassert return -EINVAL; 13902aadf72SSteffen Klassert 140d8647b79SSteffen Klassert if (p->replay_window != 0) 141d8647b79SSteffen Klassert return -EINVAL; 142d8647b79SSteffen Klassert 143d8647b79SSteffen Klassert return 0; 144d8647b79SSteffen Klassert } 145df71837dSTrent Jaeger 1461da177e4SLinus Torvalds static int verify_newsa_info(struct xfrm_usersa_info *p, 1475424f32eSThomas Graf struct nlattr **attrs) 1481da177e4SLinus Torvalds { 1491da177e4SLinus Torvalds int err; 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds err = -EINVAL; 1521da177e4SLinus Torvalds switch (p->family) { 1531da177e4SLinus Torvalds case AF_INET: 1541da177e4SLinus Torvalds break; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds case AF_INET6: 157dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 1581da177e4SLinus Torvalds break; 1591da177e4SLinus Torvalds #else 1601da177e4SLinus Torvalds err = -EAFNOSUPPORT; 1611da177e4SLinus Torvalds goto out; 1621da177e4SLinus Torvalds #endif 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds default: 1651da177e4SLinus Torvalds goto out; 1663ff50b79SStephen Hemminger } 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds err = -EINVAL; 1691da177e4SLinus Torvalds switch (p->id.proto) { 1701da177e4SLinus Torvalds case IPPROTO_AH: 1714447bb33SMartin Willi if ((!attrs[XFRMA_ALG_AUTH] && 1724447bb33SMartin Willi !attrs[XFRMA_ALG_AUTH_TRUNC]) || 1731a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 17435a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 17535d2856bSMartin Willi attrs[XFRMA_ALG_COMP] || 176a0e5ef53STobias Brunner attrs[XFRMA_TFCPAD]) 1771da177e4SLinus Torvalds goto out; 1781da177e4SLinus Torvalds break; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds case IPPROTO_ESP: 1811a6509d9SHerbert Xu if (attrs[XFRMA_ALG_COMP]) 1821a6509d9SHerbert Xu goto out; 1831a6509d9SHerbert Xu if (!attrs[XFRMA_ALG_AUTH] && 1844447bb33SMartin Willi !attrs[XFRMA_ALG_AUTH_TRUNC] && 1851a6509d9SHerbert Xu !attrs[XFRMA_ALG_CRYPT] && 1861a6509d9SHerbert Xu !attrs[XFRMA_ALG_AEAD]) 1871a6509d9SHerbert Xu goto out; 1881a6509d9SHerbert Xu if ((attrs[XFRMA_ALG_AUTH] || 1894447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 1901a6509d9SHerbert Xu attrs[XFRMA_ALG_CRYPT]) && 1911a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD]) 1921da177e4SLinus Torvalds goto out; 19335d2856bSMartin Willi if (attrs[XFRMA_TFCPAD] && 19435d2856bSMartin Willi p->mode != XFRM_MODE_TUNNEL) 19535d2856bSMartin Willi goto out; 1961da177e4SLinus Torvalds break; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds case IPPROTO_COMP: 19935a7aa08SThomas Graf if (!attrs[XFRMA_ALG_COMP] || 2001a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 20135a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 2024447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 20335d2856bSMartin Willi attrs[XFRMA_ALG_CRYPT] || 204a0e5ef53STobias Brunner attrs[XFRMA_TFCPAD] || 205a0e5ef53STobias Brunner (ntohl(p->id.spi) >= 0x10000)) 2061da177e4SLinus Torvalds goto out; 2071da177e4SLinus Torvalds break; 2081da177e4SLinus Torvalds 209dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 210e23c7194SMasahide NAKAMURA case IPPROTO_DSTOPTS: 211e23c7194SMasahide NAKAMURA case IPPROTO_ROUTING: 21235a7aa08SThomas Graf if (attrs[XFRMA_ALG_COMP] || 21335a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 2144447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 2151a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 21635a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 21735a7aa08SThomas Graf attrs[XFRMA_ENCAP] || 21835a7aa08SThomas Graf attrs[XFRMA_SEC_CTX] || 21935d2856bSMartin Willi attrs[XFRMA_TFCPAD] || 22035a7aa08SThomas Graf !attrs[XFRMA_COADDR]) 221e23c7194SMasahide NAKAMURA goto out; 222e23c7194SMasahide NAKAMURA break; 223e23c7194SMasahide NAKAMURA #endif 224e23c7194SMasahide NAKAMURA 2251da177e4SLinus Torvalds default: 2261da177e4SLinus Torvalds goto out; 2273ff50b79SStephen Hemminger } 2281da177e4SLinus Torvalds 2291a6509d9SHerbert Xu if ((err = verify_aead(attrs))) 2301a6509d9SHerbert Xu goto out; 2314447bb33SMartin Willi if ((err = verify_auth_trunc(attrs))) 2324447bb33SMartin Willi goto out; 23335a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) 2341da177e4SLinus Torvalds goto out; 23535a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) 2361da177e4SLinus Torvalds goto out; 23735a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) 2381da177e4SLinus Torvalds goto out; 23935a7aa08SThomas Graf if ((err = verify_sec_ctx_len(attrs))) 240df71837dSTrent Jaeger goto out; 241d8647b79SSteffen Klassert if ((err = verify_replay(p, attrs))) 242d8647b79SSteffen Klassert goto out; 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds err = -EINVAL; 2451da177e4SLinus Torvalds switch (p->mode) { 2467e49e6deSMasahide NAKAMURA case XFRM_MODE_TRANSPORT: 2477e49e6deSMasahide NAKAMURA case XFRM_MODE_TUNNEL: 248060f02a3SNoriaki TAKAMIYA case XFRM_MODE_ROUTEOPTIMIZATION: 2490a69452cSDiego Beltrami case XFRM_MODE_BEET: 2501da177e4SLinus Torvalds break; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds default: 2531da177e4SLinus Torvalds goto out; 2543ff50b79SStephen Hemminger } 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds err = 0; 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds out: 2591da177e4SLinus Torvalds return err; 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, 2636f2f19edSDavid S. Miller struct xfrm_algo_desc *(*get_byname)(const char *, int), 2645424f32eSThomas Graf struct nlattr *rta) 2651da177e4SLinus Torvalds { 2661da177e4SLinus Torvalds struct xfrm_algo *p, *ualg; 2671da177e4SLinus Torvalds struct xfrm_algo_desc *algo; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds if (!rta) 2701da177e4SLinus Torvalds return 0; 2711da177e4SLinus Torvalds 2725424f32eSThomas Graf ualg = nla_data(rta); 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds algo = get_byname(ualg->alg_name, 1); 2751da177e4SLinus Torvalds if (!algo) 2761da177e4SLinus Torvalds return -ENOSYS; 2771da177e4SLinus Torvalds *props = algo->desc.sadb_alg_id; 2781da177e4SLinus Torvalds 2790f99be0dSEric Dumazet p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 2801da177e4SLinus Torvalds if (!p) 2811da177e4SLinus Torvalds return -ENOMEM; 2821da177e4SLinus Torvalds 28304ff1260SHerbert Xu strcpy(p->alg_name, algo->name); 2841da177e4SLinus Torvalds *algpp = p; 2851da177e4SLinus Torvalds return 0; 2861da177e4SLinus Torvalds } 2871da177e4SLinus Torvalds 28869b0137fSHerbert Xu static int attach_crypt(struct xfrm_state *x, struct nlattr *rta) 28969b0137fSHerbert Xu { 29069b0137fSHerbert Xu struct xfrm_algo *p, *ualg; 29169b0137fSHerbert Xu struct xfrm_algo_desc *algo; 29269b0137fSHerbert Xu 29369b0137fSHerbert Xu if (!rta) 29469b0137fSHerbert Xu return 0; 29569b0137fSHerbert Xu 29669b0137fSHerbert Xu ualg = nla_data(rta); 29769b0137fSHerbert Xu 29869b0137fSHerbert Xu algo = xfrm_ealg_get_byname(ualg->alg_name, 1); 29969b0137fSHerbert Xu if (!algo) 30069b0137fSHerbert Xu return -ENOSYS; 30169b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 30269b0137fSHerbert Xu 30369b0137fSHerbert Xu p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 30469b0137fSHerbert Xu if (!p) 30569b0137fSHerbert Xu return -ENOMEM; 30669b0137fSHerbert Xu 30769b0137fSHerbert Xu strcpy(p->alg_name, algo->name); 30869b0137fSHerbert Xu x->ealg = p; 30969b0137fSHerbert Xu x->geniv = algo->uinfo.encr.geniv; 31069b0137fSHerbert Xu return 0; 31169b0137fSHerbert Xu } 31269b0137fSHerbert Xu 3134447bb33SMartin Willi static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, 3144447bb33SMartin Willi struct nlattr *rta) 3154447bb33SMartin Willi { 3164447bb33SMartin Willi struct xfrm_algo *ualg; 3174447bb33SMartin Willi struct xfrm_algo_auth *p; 3184447bb33SMartin Willi struct xfrm_algo_desc *algo; 3194447bb33SMartin Willi 3204447bb33SMartin Willi if (!rta) 3214447bb33SMartin Willi return 0; 3224447bb33SMartin Willi 3234447bb33SMartin Willi ualg = nla_data(rta); 3244447bb33SMartin Willi 3254447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 3264447bb33SMartin Willi if (!algo) 3274447bb33SMartin Willi return -ENOSYS; 3284447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 3294447bb33SMartin Willi 3304447bb33SMartin Willi p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); 3314447bb33SMartin Willi if (!p) 3324447bb33SMartin Willi return -ENOMEM; 3334447bb33SMartin Willi 3344447bb33SMartin Willi strcpy(p->alg_name, algo->name); 3354447bb33SMartin Willi p->alg_key_len = ualg->alg_key_len; 3364447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 3374447bb33SMartin Willi memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); 3384447bb33SMartin Willi 3394447bb33SMartin Willi *algpp = p; 3404447bb33SMartin Willi return 0; 3414447bb33SMartin Willi } 3424447bb33SMartin Willi 3434447bb33SMartin Willi static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, 3444447bb33SMartin Willi struct nlattr *rta) 3454447bb33SMartin Willi { 3464447bb33SMartin Willi struct xfrm_algo_auth *p, *ualg; 3474447bb33SMartin Willi struct xfrm_algo_desc *algo; 3484447bb33SMartin Willi 3494447bb33SMartin Willi if (!rta) 3504447bb33SMartin Willi return 0; 3514447bb33SMartin Willi 3524447bb33SMartin Willi ualg = nla_data(rta); 3534447bb33SMartin Willi 3544447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 3554447bb33SMartin Willi if (!algo) 3564447bb33SMartin Willi return -ENOSYS; 357689f1c9dSHerbert Xu if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) 3584447bb33SMartin Willi return -EINVAL; 3594447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 3604447bb33SMartin Willi 3614447bb33SMartin Willi p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); 3624447bb33SMartin Willi if (!p) 3634447bb33SMartin Willi return -ENOMEM; 3644447bb33SMartin Willi 3654447bb33SMartin Willi strcpy(p->alg_name, algo->name); 3664447bb33SMartin Willi if (!p->alg_trunc_len) 3674447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 3684447bb33SMartin Willi 3694447bb33SMartin Willi *algpp = p; 3704447bb33SMartin Willi return 0; 3714447bb33SMartin Willi } 3724447bb33SMartin Willi 37369b0137fSHerbert Xu static int attach_aead(struct xfrm_state *x, struct nlattr *rta) 3741a6509d9SHerbert Xu { 3751a6509d9SHerbert Xu struct xfrm_algo_aead *p, *ualg; 3761a6509d9SHerbert Xu struct xfrm_algo_desc *algo; 3771a6509d9SHerbert Xu 3781a6509d9SHerbert Xu if (!rta) 3791a6509d9SHerbert Xu return 0; 3801a6509d9SHerbert Xu 3811a6509d9SHerbert Xu ualg = nla_data(rta); 3821a6509d9SHerbert Xu 3831a6509d9SHerbert Xu algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); 3841a6509d9SHerbert Xu if (!algo) 3851a6509d9SHerbert Xu return -ENOSYS; 38669b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 3871a6509d9SHerbert Xu 3881a6509d9SHerbert Xu p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); 3891a6509d9SHerbert Xu if (!p) 3901a6509d9SHerbert Xu return -ENOMEM; 3911a6509d9SHerbert Xu 3921a6509d9SHerbert Xu strcpy(p->alg_name, algo->name); 39369b0137fSHerbert Xu x->aead = p; 39469b0137fSHerbert Xu x->geniv = algo->uinfo.aead.geniv; 3951a6509d9SHerbert Xu return 0; 3961a6509d9SHerbert Xu } 3971a6509d9SHerbert Xu 398e2b19125SSteffen Klassert static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, 399e2b19125SSteffen Klassert struct nlattr *rp) 400e2b19125SSteffen Klassert { 401e2b19125SSteffen Klassert struct xfrm_replay_state_esn *up; 4025e708e47SAlexey Dobriyan unsigned int ulen; 403e2b19125SSteffen Klassert 404e2b19125SSteffen Klassert if (!replay_esn || !rp) 405e2b19125SSteffen Klassert return 0; 406e2b19125SSteffen Klassert 407e2b19125SSteffen Klassert up = nla_data(rp); 408ecd79187SMathias Krause ulen = xfrm_replay_state_esn_len(up); 409e2b19125SSteffen Klassert 410f843ee6dSAndy Whitcroft /* Check the overall length and the internal bitmap length to avoid 411f843ee6dSAndy Whitcroft * potential overflow. */ 4125e708e47SAlexey Dobriyan if (nla_len(rp) < (int)ulen || 413f843ee6dSAndy Whitcroft xfrm_replay_state_esn_len(replay_esn) != ulen || 414f843ee6dSAndy Whitcroft replay_esn->bmp_len != up->bmp_len) 415e2b19125SSteffen Klassert return -EINVAL; 416e2b19125SSteffen Klassert 417677e806dSAndy Whitcroft if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) 418677e806dSAndy Whitcroft return -EINVAL; 419677e806dSAndy Whitcroft 420e2b19125SSteffen Klassert return 0; 421e2b19125SSteffen Klassert } 422e2b19125SSteffen Klassert 423d8647b79SSteffen Klassert static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, 424d8647b79SSteffen Klassert struct xfrm_replay_state_esn **preplay_esn, 425d8647b79SSteffen Klassert struct nlattr *rta) 426d8647b79SSteffen Klassert { 427d8647b79SSteffen Klassert struct xfrm_replay_state_esn *p, *pp, *up; 4285e708e47SAlexey Dobriyan unsigned int klen, ulen; 429d8647b79SSteffen Klassert 430d8647b79SSteffen Klassert if (!rta) 431d8647b79SSteffen Klassert return 0; 432d8647b79SSteffen Klassert 433d8647b79SSteffen Klassert up = nla_data(rta); 434ecd79187SMathias Krause klen = xfrm_replay_state_esn_len(up); 4355e708e47SAlexey Dobriyan ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up); 436d8647b79SSteffen Klassert 437ecd79187SMathias Krause p = kzalloc(klen, GFP_KERNEL); 438d8647b79SSteffen Klassert if (!p) 439d8647b79SSteffen Klassert return -ENOMEM; 440d8647b79SSteffen Klassert 441ecd79187SMathias Krause pp = kzalloc(klen, GFP_KERNEL); 442d8647b79SSteffen Klassert if (!pp) { 443d8647b79SSteffen Klassert kfree(p); 444d8647b79SSteffen Klassert return -ENOMEM; 445d8647b79SSteffen Klassert } 446d8647b79SSteffen Klassert 447ecd79187SMathias Krause memcpy(p, up, ulen); 448ecd79187SMathias Krause memcpy(pp, up, ulen); 449ecd79187SMathias Krause 450d8647b79SSteffen Klassert *replay_esn = p; 451d8647b79SSteffen Klassert *preplay_esn = pp; 452d8647b79SSteffen Klassert 453d8647b79SSteffen Klassert return 0; 454d8647b79SSteffen Klassert } 455d8647b79SSteffen Klassert 456a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) 457df71837dSTrent Jaeger { 458a1b831f2SAlexey Dobriyan unsigned int len = 0; 459df71837dSTrent Jaeger 460df71837dSTrent Jaeger if (xfrm_ctx) { 461df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 462df71837dSTrent Jaeger len += xfrm_ctx->ctx_len; 463df71837dSTrent Jaeger } 464df71837dSTrent Jaeger return len; 465df71837dSTrent Jaeger } 466df71837dSTrent Jaeger 4671da177e4SLinus Torvalds static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 4681da177e4SLinus Torvalds { 4691da177e4SLinus Torvalds memcpy(&x->id, &p->id, sizeof(x->id)); 4701da177e4SLinus Torvalds memcpy(&x->sel, &p->sel, sizeof(x->sel)); 4711da177e4SLinus Torvalds memcpy(&x->lft, &p->lft, sizeof(x->lft)); 4721da177e4SLinus Torvalds x->props.mode = p->mode; 47333fce60dSFan Du x->props.replay_window = min_t(unsigned int, p->replay_window, 47433fce60dSFan Du sizeof(x->replay.bitmap) * 8); 4751da177e4SLinus Torvalds x->props.reqid = p->reqid; 4761da177e4SLinus Torvalds x->props.family = p->family; 47754489c14SDavid S. Miller memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); 4781da177e4SLinus Torvalds x->props.flags = p->flags; 479196b0036SHerbert Xu 480ccf9b3b8SSteffen Klassert if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) 481196b0036SHerbert Xu x->sel.family = p->family; 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 484d51d081dSJamal Hadi Salim /* 485d51d081dSJamal Hadi Salim * someday when pfkey also has support, we could have the code 486d51d081dSJamal Hadi Salim * somehow made shareable and move it to xfrm_state.c - JHS 487d51d081dSJamal Hadi Salim * 488d51d081dSJamal Hadi Salim */ 489e3ac104dSMathias Krause static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, 490e3ac104dSMathias Krause int update_esn) 491d51d081dSJamal Hadi Salim { 4925424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 493e3ac104dSMathias Krause struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; 4945424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 4955424f32eSThomas Graf struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 4965424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 497d51d081dSJamal Hadi Salim 498d8647b79SSteffen Klassert if (re) { 499d8647b79SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 500d8647b79SSteffen Klassert replay_esn = nla_data(re); 501d8647b79SSteffen Klassert memcpy(x->replay_esn, replay_esn, 502d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 503d8647b79SSteffen Klassert memcpy(x->preplay_esn, replay_esn, 504d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 505d8647b79SSteffen Klassert } 506d8647b79SSteffen Klassert 507d51d081dSJamal Hadi Salim if (rp) { 508d51d081dSJamal Hadi Salim struct xfrm_replay_state *replay; 5095424f32eSThomas Graf replay = nla_data(rp); 510d51d081dSJamal Hadi Salim memcpy(&x->replay, replay, sizeof(*replay)); 511d51d081dSJamal Hadi Salim memcpy(&x->preplay, replay, sizeof(*replay)); 512d51d081dSJamal Hadi Salim } 513d51d081dSJamal Hadi Salim 514d51d081dSJamal Hadi Salim if (lt) { 515d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur *ltime; 5165424f32eSThomas Graf ltime = nla_data(lt); 517d51d081dSJamal Hadi Salim x->curlft.bytes = ltime->bytes; 518d51d081dSJamal Hadi Salim x->curlft.packets = ltime->packets; 519d51d081dSJamal Hadi Salim x->curlft.add_time = ltime->add_time; 520d51d081dSJamal Hadi Salim x->curlft.use_time = ltime->use_time; 521d51d081dSJamal Hadi Salim } 522d51d081dSJamal Hadi Salim 523cf5cb79fSThomas Graf if (et) 5245424f32eSThomas Graf x->replay_maxage = nla_get_u32(et); 525d51d081dSJamal Hadi Salim 526cf5cb79fSThomas Graf if (rt) 5275424f32eSThomas Graf x->replay_maxdiff = nla_get_u32(rt); 528d51d081dSJamal Hadi Salim } 529d51d081dSJamal Hadi Salim 530fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_state_construct(struct net *net, 531fc34acd3SAlexey Dobriyan struct xfrm_usersa_info *p, 5325424f32eSThomas Graf struct nlattr **attrs, 5331da177e4SLinus Torvalds int *errp) 5341da177e4SLinus Torvalds { 535fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 5361da177e4SLinus Torvalds int err = -ENOMEM; 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds if (!x) 5391da177e4SLinus Torvalds goto error_no_put; 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds copy_from_user_state(x, p); 5421da177e4SLinus Torvalds 543a947b0a9SNicolas Dichtel if (attrs[XFRMA_SA_EXTRA_FLAGS]) 544a947b0a9SNicolas Dichtel x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); 545a947b0a9SNicolas Dichtel 54669b0137fSHerbert Xu if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD]))) 5471a6509d9SHerbert Xu goto error; 5484447bb33SMartin Willi if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, 5494447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC]))) 5504447bb33SMartin Willi goto error; 5514447bb33SMartin Willi if (!x->props.aalgo) { 5524447bb33SMartin Willi if ((err = attach_auth(&x->aalg, &x->props.aalgo, 55335a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH]))) 5541da177e4SLinus Torvalds goto error; 5554447bb33SMartin Willi } 55669b0137fSHerbert Xu if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT]))) 5571da177e4SLinus Torvalds goto error; 5581da177e4SLinus Torvalds if ((err = attach_one_algo(&x->calg, &x->props.calgo, 5591da177e4SLinus Torvalds xfrm_calg_get_byname, 56035a7aa08SThomas Graf attrs[XFRMA_ALG_COMP]))) 5611da177e4SLinus Torvalds goto error; 562fd21150aSThomas Graf 563fd21150aSThomas Graf if (attrs[XFRMA_ENCAP]) { 564fd21150aSThomas Graf x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 565fd21150aSThomas Graf sizeof(*x->encap), GFP_KERNEL); 566fd21150aSThomas Graf if (x->encap == NULL) 5671da177e4SLinus Torvalds goto error; 568fd21150aSThomas Graf } 569fd21150aSThomas Graf 57035d2856bSMartin Willi if (attrs[XFRMA_TFCPAD]) 57135d2856bSMartin Willi x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); 57235d2856bSMartin Willi 573fd21150aSThomas Graf if (attrs[XFRMA_COADDR]) { 574fd21150aSThomas Graf x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), 575fd21150aSThomas Graf sizeof(*x->coaddr), GFP_KERNEL); 576fd21150aSThomas Graf if (x->coaddr == NULL) 577060f02a3SNoriaki TAKAMIYA goto error; 578fd21150aSThomas Graf } 579fd21150aSThomas Graf 5806f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &x->mark); 5816f26b61eSJamal Hadi Salim 582077fbac4SLorenzo Colitti if (attrs[XFRMA_OUTPUT_MARK]) 583077fbac4SLorenzo Colitti x->props.output_mark = nla_get_u32(attrs[XFRMA_OUTPUT_MARK]); 584077fbac4SLorenzo Colitti 585ffdb5211SIlan Tayari err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]); 5861da177e4SLinus Torvalds if (err) 5871da177e4SLinus Torvalds goto error; 5881da177e4SLinus Torvalds 5892f30ea50SMathias Krause if (attrs[XFRMA_SEC_CTX]) { 5902f30ea50SMathias Krause err = security_xfrm_state_alloc(x, 5912f30ea50SMathias Krause nla_data(attrs[XFRMA_SEC_CTX])); 5922f30ea50SMathias Krause if (err) 593df71837dSTrent Jaeger goto error; 5942f30ea50SMathias Krause } 595df71837dSTrent Jaeger 596d8647b79SSteffen Klassert if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, 597d8647b79SSteffen Klassert attrs[XFRMA_REPLAY_ESN_VAL]))) 598d8647b79SSteffen Klassert goto error; 599d8647b79SSteffen Klassert 6001da177e4SLinus Torvalds x->km.seq = p->seq; 601b27aeadbSAlexey Dobriyan x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; 602d51d081dSJamal Hadi Salim /* sysctl_xfrm_aevent_etime is in 100ms units */ 603b27aeadbSAlexey Dobriyan x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; 604d51d081dSJamal Hadi Salim 6059fdc4883SSteffen Klassert if ((err = xfrm_init_replay(x))) 6069fdc4883SSteffen Klassert goto error; 607d51d081dSJamal Hadi Salim 6089fdc4883SSteffen Klassert /* override default values from above */ 609e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 0); 6101da177e4SLinus Torvalds 611cc01572eSYossi Kuperman /* configure the hardware if offload is requested */ 612cc01572eSYossi Kuperman if (attrs[XFRMA_OFFLOAD_DEV]) { 613cc01572eSYossi Kuperman err = xfrm_dev_state_add(net, x, 614cc01572eSYossi Kuperman nla_data(attrs[XFRMA_OFFLOAD_DEV])); 615cc01572eSYossi Kuperman if (err) 616cc01572eSYossi Kuperman goto error; 617cc01572eSYossi Kuperman } 618cc01572eSYossi Kuperman 6191da177e4SLinus Torvalds return x; 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds error: 6221da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 6231da177e4SLinus Torvalds xfrm_state_put(x); 6241da177e4SLinus Torvalds error_no_put: 6251da177e4SLinus Torvalds *errp = err; 6261da177e4SLinus Torvalds return NULL; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 62922e70050SChristoph Hellwig static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 6305424f32eSThomas Graf struct nlattr **attrs) 6311da177e4SLinus Torvalds { 632fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 6337b67c857SThomas Graf struct xfrm_usersa_info *p = nlmsg_data(nlh); 6341da177e4SLinus Torvalds struct xfrm_state *x; 6351da177e4SLinus Torvalds int err; 63626b15dadSJamal Hadi Salim struct km_event c; 6371da177e4SLinus Torvalds 63835a7aa08SThomas Graf err = verify_newsa_info(p, attrs); 6391da177e4SLinus Torvalds if (err) 6401da177e4SLinus Torvalds return err; 6411da177e4SLinus Torvalds 642fc34acd3SAlexey Dobriyan x = xfrm_state_construct(net, p, attrs, &err); 6431da177e4SLinus Torvalds if (!x) 6441da177e4SLinus Torvalds return err; 6451da177e4SLinus Torvalds 64626b15dadSJamal Hadi Salim xfrm_state_hold(x); 6471da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 6481da177e4SLinus Torvalds err = xfrm_state_add(x); 6491da177e4SLinus Torvalds else 6501da177e4SLinus Torvalds err = xfrm_state_update(x); 6511da177e4SLinus Torvalds 6522e71029eSTetsuo Handa xfrm_audit_state_add(x, err ? 0 : 1, true); 653161a09e7SJoy Latten 6541da177e4SLinus Torvalds if (err < 0) { 6551da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 656c5d4d7d8SSteffen Klassert xfrm_dev_state_delete(x); 65721380b81SHerbert Xu __xfrm_state_put(x); 6587d6dfe1fSPatrick McHardy goto out; 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds 661cc01572eSYossi Kuperman if (x->km.state == XFRM_STATE_VOID) 662cc01572eSYossi Kuperman x->km.state = XFRM_STATE_VALID; 663cc01572eSYossi Kuperman 66426b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 66515e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 666f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 66726b15dadSJamal Hadi Salim 66826b15dadSJamal Hadi Salim km_state_notify(x, &c); 6697d6dfe1fSPatrick McHardy out: 67026b15dadSJamal Hadi Salim xfrm_state_put(x); 6711da177e4SLinus Torvalds return err; 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 674fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_user_state_lookup(struct net *net, 675fc34acd3SAlexey Dobriyan struct xfrm_usersa_id *p, 6765424f32eSThomas Graf struct nlattr **attrs, 677eb2971b6SMasahide NAKAMURA int *errp) 678eb2971b6SMasahide NAKAMURA { 679eb2971b6SMasahide NAKAMURA struct xfrm_state *x = NULL; 6806f26b61eSJamal Hadi Salim struct xfrm_mark m; 681eb2971b6SMasahide NAKAMURA int err; 6826f26b61eSJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 683eb2971b6SMasahide NAKAMURA 684eb2971b6SMasahide NAKAMURA if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { 685eb2971b6SMasahide NAKAMURA err = -ESRCH; 6866f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); 687eb2971b6SMasahide NAKAMURA } else { 688eb2971b6SMasahide NAKAMURA xfrm_address_t *saddr = NULL; 689eb2971b6SMasahide NAKAMURA 69035a7aa08SThomas Graf verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); 691eb2971b6SMasahide NAKAMURA if (!saddr) { 692eb2971b6SMasahide NAKAMURA err = -EINVAL; 693eb2971b6SMasahide NAKAMURA goto out; 694eb2971b6SMasahide NAKAMURA } 695eb2971b6SMasahide NAKAMURA 6969abbffeeSMasahide NAKAMURA err = -ESRCH; 6976f26b61eSJamal Hadi Salim x = xfrm_state_lookup_byaddr(net, mark, 6986f26b61eSJamal Hadi Salim &p->daddr, saddr, 699221df1edSAlexey Dobriyan p->proto, p->family); 700eb2971b6SMasahide NAKAMURA } 701eb2971b6SMasahide NAKAMURA 702eb2971b6SMasahide NAKAMURA out: 703eb2971b6SMasahide NAKAMURA if (!x && errp) 704eb2971b6SMasahide NAKAMURA *errp = err; 705eb2971b6SMasahide NAKAMURA return x; 706eb2971b6SMasahide NAKAMURA } 707eb2971b6SMasahide NAKAMURA 70822e70050SChristoph Hellwig static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 7095424f32eSThomas Graf struct nlattr **attrs) 7101da177e4SLinus Torvalds { 711fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 7121da177e4SLinus Torvalds struct xfrm_state *x; 713eb2971b6SMasahide NAKAMURA int err = -ESRCH; 71426b15dadSJamal Hadi Salim struct km_event c; 7157b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 7161da177e4SLinus Torvalds 717fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 7181da177e4SLinus Torvalds if (x == NULL) 719eb2971b6SMasahide NAKAMURA return err; 7201da177e4SLinus Torvalds 7216f68dc37SDavid S. Miller if ((err = security_xfrm_state_delete(x)) != 0) 722c8c05a8eSCatherine Zhang goto out; 723c8c05a8eSCatherine Zhang 7241da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 725c8c05a8eSCatherine Zhang err = -EPERM; 726c8c05a8eSCatherine Zhang goto out; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds 72926b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 730161a09e7SJoy Latten 731c8c05a8eSCatherine Zhang if (err < 0) 732c8c05a8eSCatherine Zhang goto out; 73326b15dadSJamal Hadi Salim 73426b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 73515e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 736f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 73726b15dadSJamal Hadi Salim km_state_notify(x, &c); 7381da177e4SLinus Torvalds 739c8c05a8eSCatherine Zhang out: 7402e71029eSTetsuo Handa xfrm_audit_state_delete(x, err ? 0 : 1, true); 741c8c05a8eSCatherine Zhang xfrm_state_put(x); 74226b15dadSJamal Hadi Salim return err; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 7461da177e4SLinus Torvalds { 747f778a636SMathias Krause memset(p, 0, sizeof(*p)); 7481da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 7491da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 7501da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 7511da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 752e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay_window, &p->stats.replay_window); 753e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay, &p->stats.replay); 754e33d4f13SSowmini Varadhan put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed); 75554489c14SDavid S. Miller memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); 7561da177e4SLinus Torvalds p->mode = x->props.mode; 7571da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 7581da177e4SLinus Torvalds p->reqid = x->props.reqid; 7591da177e4SLinus Torvalds p->family = x->props.family; 7601da177e4SLinus Torvalds p->flags = x->props.flags; 7611da177e4SLinus Torvalds p->seq = x->km.seq; 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds struct xfrm_dump_info { 7651da177e4SLinus Torvalds struct sk_buff *in_skb; 7661da177e4SLinus Torvalds struct sk_buff *out_skb; 7671da177e4SLinus Torvalds u32 nlmsg_seq; 7681da177e4SLinus Torvalds u16 nlmsg_flags; 7691da177e4SLinus Torvalds }; 7701da177e4SLinus Torvalds 771c0144beaSThomas Graf static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) 772c0144beaSThomas Graf { 773c0144beaSThomas Graf struct xfrm_user_sec_ctx *uctx; 774c0144beaSThomas Graf struct nlattr *attr; 77568325d3bSHerbert Xu int ctx_size = sizeof(*uctx) + s->ctx_len; 776c0144beaSThomas Graf 777c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); 778c0144beaSThomas Graf if (attr == NULL) 779c0144beaSThomas Graf return -EMSGSIZE; 780c0144beaSThomas Graf 781c0144beaSThomas Graf uctx = nla_data(attr); 782c0144beaSThomas Graf uctx->exttype = XFRMA_SEC_CTX; 783c0144beaSThomas Graf uctx->len = ctx_size; 784c0144beaSThomas Graf uctx->ctx_doi = s->ctx_doi; 785c0144beaSThomas Graf uctx->ctx_alg = s->ctx_alg; 786c0144beaSThomas Graf uctx->ctx_len = s->ctx_len; 787c0144beaSThomas Graf memcpy(uctx + 1, s->ctx_str, s->ctx_len); 788c0144beaSThomas Graf 789c0144beaSThomas Graf return 0; 790c0144beaSThomas Graf } 791c0144beaSThomas Graf 792d77e38e6SSteffen Klassert static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb) 793d77e38e6SSteffen Klassert { 794d77e38e6SSteffen Klassert struct xfrm_user_offload *xuo; 795d77e38e6SSteffen Klassert struct nlattr *attr; 796d77e38e6SSteffen Klassert 797d77e38e6SSteffen Klassert attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo)); 798d77e38e6SSteffen Klassert if (attr == NULL) 799d77e38e6SSteffen Klassert return -EMSGSIZE; 800d77e38e6SSteffen Klassert 801d77e38e6SSteffen Klassert xuo = nla_data(attr); 8025fe0d4bdSMathias Krause memset(xuo, 0, sizeof(*xuo)); 803d77e38e6SSteffen Klassert xuo->ifindex = xso->dev->ifindex; 804d77e38e6SSteffen Klassert xuo->flags = xso->flags; 805d77e38e6SSteffen Klassert 806d77e38e6SSteffen Klassert return 0; 807d77e38e6SSteffen Klassert } 808d77e38e6SSteffen Klassert 8094447bb33SMartin Willi static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) 8104447bb33SMartin Willi { 8114447bb33SMartin Willi struct xfrm_algo *algo; 8124447bb33SMartin Willi struct nlattr *nla; 8134447bb33SMartin Willi 8144447bb33SMartin Willi nla = nla_reserve(skb, XFRMA_ALG_AUTH, 8154447bb33SMartin Willi sizeof(*algo) + (auth->alg_key_len + 7) / 8); 8164447bb33SMartin Willi if (!nla) 8174447bb33SMartin Willi return -EMSGSIZE; 8184447bb33SMartin Willi 8194447bb33SMartin Willi algo = nla_data(nla); 8204c87308bSMathias Krause strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); 8214447bb33SMartin Willi memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); 8224447bb33SMartin Willi algo->alg_key_len = auth->alg_key_len; 8234447bb33SMartin Willi 8244447bb33SMartin Willi return 0; 8254447bb33SMartin Willi } 8264447bb33SMartin Willi 82768325d3bSHerbert Xu /* Don't change this without updating xfrm_sa_len! */ 82868325d3bSHerbert Xu static int copy_to_user_state_extra(struct xfrm_state *x, 82968325d3bSHerbert Xu struct xfrm_usersa_info *p, 83068325d3bSHerbert Xu struct sk_buff *skb) 8311da177e4SLinus Torvalds { 8321d1e34ddSDavid S. Miller int ret = 0; 8331d1e34ddSDavid S. Miller 8341da177e4SLinus Torvalds copy_to_user_state(x, p); 8351da177e4SLinus Torvalds 836a947b0a9SNicolas Dichtel if (x->props.extra_flags) { 837a947b0a9SNicolas Dichtel ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, 838a947b0a9SNicolas Dichtel x->props.extra_flags); 839a947b0a9SNicolas Dichtel if (ret) 840a947b0a9SNicolas Dichtel goto out; 841a947b0a9SNicolas Dichtel } 842a947b0a9SNicolas Dichtel 8431d1e34ddSDavid S. Miller if (x->coaddr) { 8441d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); 8451d1e34ddSDavid S. Miller if (ret) 8461d1e34ddSDavid S. Miller goto out; 8471d1e34ddSDavid S. Miller } 8481d1e34ddSDavid S. Miller if (x->lastused) { 849de95c4a4SNicolas Dichtel ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused, 850de95c4a4SNicolas Dichtel XFRMA_PAD); 8511d1e34ddSDavid S. Miller if (ret) 8521d1e34ddSDavid S. Miller goto out; 8531d1e34ddSDavid S. Miller } 8541d1e34ddSDavid S. Miller if (x->aead) { 8551d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); 8561d1e34ddSDavid S. Miller if (ret) 8571d1e34ddSDavid S. Miller goto out; 8581d1e34ddSDavid S. Miller } 8591d1e34ddSDavid S. Miller if (x->aalg) { 8601d1e34ddSDavid S. Miller ret = copy_to_user_auth(x->aalg, skb); 8611d1e34ddSDavid S. Miller if (!ret) 8621d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, 8631d1e34ddSDavid S. Miller xfrm_alg_auth_len(x->aalg), x->aalg); 8641d1e34ddSDavid S. Miller if (ret) 8651d1e34ddSDavid S. Miller goto out; 8661d1e34ddSDavid S. Miller } 8671d1e34ddSDavid S. Miller if (x->ealg) { 8681d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); 8691d1e34ddSDavid S. Miller if (ret) 8701d1e34ddSDavid S. Miller goto out; 8711d1e34ddSDavid S. Miller } 8721d1e34ddSDavid S. Miller if (x->calg) { 8731d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 8741d1e34ddSDavid S. Miller if (ret) 8751d1e34ddSDavid S. Miller goto out; 8761d1e34ddSDavid S. Miller } 8771d1e34ddSDavid S. Miller if (x->encap) { 8781d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 8791d1e34ddSDavid S. Miller if (ret) 8801d1e34ddSDavid S. Miller goto out; 8811d1e34ddSDavid S. Miller } 8821d1e34ddSDavid S. Miller if (x->tfcpad) { 8831d1e34ddSDavid S. Miller ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); 8841d1e34ddSDavid S. Miller if (ret) 8851d1e34ddSDavid S. Miller goto out; 8861d1e34ddSDavid S. Miller } 8871d1e34ddSDavid S. Miller ret = xfrm_mark_put(skb, &x->mark); 8881d1e34ddSDavid S. Miller if (ret) 8891d1e34ddSDavid S. Miller goto out; 890f293a5e3Sdingzhi if (x->replay_esn) 8911d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 892d0fde795SDavid S. Miller xfrm_replay_state_esn_len(x->replay_esn), 8931d1e34ddSDavid S. Miller x->replay_esn); 894f293a5e3Sdingzhi else 895f293a5e3Sdingzhi ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 896f293a5e3Sdingzhi &x->replay); 8971d1e34ddSDavid S. Miller if (ret) 8981d1e34ddSDavid S. Miller goto out; 899d77e38e6SSteffen Klassert if(x->xso.dev) 900d77e38e6SSteffen Klassert ret = copy_user_offload(&x->xso, skb); 901d77e38e6SSteffen Klassert if (ret) 902d77e38e6SSteffen Klassert goto out; 903077fbac4SLorenzo Colitti if (x->props.output_mark) { 904077fbac4SLorenzo Colitti ret = nla_put_u32(skb, XFRMA_OUTPUT_MARK, x->props.output_mark); 905077fbac4SLorenzo Colitti if (ret) 906077fbac4SLorenzo Colitti goto out; 907077fbac4SLorenzo Colitti } 9088598112dSSteffen Klassert if (x->security) 9098598112dSSteffen Klassert ret = copy_sec_ctx(x->security, skb); 9101d1e34ddSDavid S. Miller out: 9111d1e34ddSDavid S. Miller return ret; 91268325d3bSHerbert Xu } 91368325d3bSHerbert Xu 91468325d3bSHerbert Xu static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 91568325d3bSHerbert Xu { 91668325d3bSHerbert Xu struct xfrm_dump_info *sp = ptr; 91768325d3bSHerbert Xu struct sk_buff *in_skb = sp->in_skb; 91868325d3bSHerbert Xu struct sk_buff *skb = sp->out_skb; 91968325d3bSHerbert Xu struct xfrm_usersa_info *p; 92068325d3bSHerbert Xu struct nlmsghdr *nlh; 92168325d3bSHerbert Xu int err; 92268325d3bSHerbert Xu 92315e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 92468325d3bSHerbert Xu XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); 92568325d3bSHerbert Xu if (nlh == NULL) 92668325d3bSHerbert Xu return -EMSGSIZE; 92768325d3bSHerbert Xu 92868325d3bSHerbert Xu p = nlmsg_data(nlh); 92968325d3bSHerbert Xu 93068325d3bSHerbert Xu err = copy_to_user_state_extra(x, p, skb); 9311d1e34ddSDavid S. Miller if (err) { 9329825069dSThomas Graf nlmsg_cancel(skb, nlh); 93368325d3bSHerbert Xu return err; 9341da177e4SLinus Torvalds } 9351d1e34ddSDavid S. Miller nlmsg_end(skb, nlh); 9361d1e34ddSDavid S. Miller return 0; 9371d1e34ddSDavid S. Miller } 9381da177e4SLinus Torvalds 9394c563f76STimo Teras static int xfrm_dump_sa_done(struct netlink_callback *cb) 9404c563f76STimo Teras { 9414c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 942283bc9f3SFan Du struct sock *sk = cb->skb->sk; 943283bc9f3SFan Du struct net *net = sock_net(sk); 944283bc9f3SFan Du 9451ba5bf99SVegard Nossum if (cb->args[0]) 946283bc9f3SFan Du xfrm_state_walk_done(walk, net); 9474c563f76STimo Teras return 0; 9484c563f76STimo Teras } 9494c563f76STimo Teras 950d3623099SNicolas Dichtel static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; 9511da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 9521da177e4SLinus Torvalds { 953fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 9544c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 9551da177e4SLinus Torvalds struct xfrm_dump_info info; 9561da177e4SLinus Torvalds 9574c563f76STimo Teras BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > 9584c563f76STimo Teras sizeof(cb->args) - sizeof(cb->args[0])); 9594c563f76STimo Teras 9601da177e4SLinus Torvalds info.in_skb = cb->skb; 9611da177e4SLinus Torvalds info.out_skb = skb; 9621da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 9631da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 9644c563f76STimo Teras 9654c563f76STimo Teras if (!cb->args[0]) { 966d3623099SNicolas Dichtel struct nlattr *attrs[XFRMA_MAX+1]; 967870a2df4SNicolas Dichtel struct xfrm_address_filter *filter = NULL; 968d3623099SNicolas Dichtel u8 proto = 0; 969d3623099SNicolas Dichtel int err; 970d3623099SNicolas Dichtel 971fceb6435SJohannes Berg err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy, 972fceb6435SJohannes Berg NULL); 973d3623099SNicolas Dichtel if (err < 0) 974d3623099SNicolas Dichtel return err; 975d3623099SNicolas Dichtel 976870a2df4SNicolas Dichtel if (attrs[XFRMA_ADDRESS_FILTER]) { 977df367561SAndrzej Hajda filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), 978df367561SAndrzej Hajda sizeof(*filter), GFP_KERNEL); 979d3623099SNicolas Dichtel if (filter == NULL) 980d3623099SNicolas Dichtel return -ENOMEM; 981d3623099SNicolas Dichtel } 982d3623099SNicolas Dichtel 983d3623099SNicolas Dichtel if (attrs[XFRMA_PROTO]) 984d3623099SNicolas Dichtel proto = nla_get_u8(attrs[XFRMA_PROTO]); 985d3623099SNicolas Dichtel 986d3623099SNicolas Dichtel xfrm_state_walk_init(walk, proto, filter); 9871ba5bf99SVegard Nossum cb->args[0] = 1; 9884c563f76STimo Teras } 9894c563f76STimo Teras 990fc34acd3SAlexey Dobriyan (void) xfrm_state_walk(net, walk, dump_one_state, &info); 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds return skb->len; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 9961da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 9971da177e4SLinus Torvalds { 9981da177e4SLinus Torvalds struct xfrm_dump_info info; 9991da177e4SLinus Torvalds struct sk_buff *skb; 1000864745d2SMathias Krause int err; 10011da177e4SLinus Torvalds 10027deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 10031da177e4SLinus Torvalds if (!skb) 10041da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds info.in_skb = in_skb; 10071da177e4SLinus Torvalds info.out_skb = skb; 10081da177e4SLinus Torvalds info.nlmsg_seq = seq; 10091da177e4SLinus Torvalds info.nlmsg_flags = 0; 10101da177e4SLinus Torvalds 1011864745d2SMathias Krause err = dump_one_state(x, 0, &info); 1012864745d2SMathias Krause if (err) { 10131da177e4SLinus Torvalds kfree_skb(skb); 1014864745d2SMathias Krause return ERR_PTR(err); 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds return skb; 10181da177e4SLinus Torvalds } 10191da177e4SLinus Torvalds 102021ee543eSMichal Kubecek /* A wrapper for nlmsg_multicast() checking that nlsk is still available. 102121ee543eSMichal Kubecek * Must be called with RCU read lock. 102221ee543eSMichal Kubecek */ 102321ee543eSMichal Kubecek static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, 102421ee543eSMichal Kubecek u32 pid, unsigned int group) 102521ee543eSMichal Kubecek { 102621ee543eSMichal Kubecek struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); 102721ee543eSMichal Kubecek 1028*86126b77SFlorian Westphal if (!nlsk) { 1029*86126b77SFlorian Westphal kfree_skb(skb); 1030*86126b77SFlorian Westphal return -EPIPE; 1031*86126b77SFlorian Westphal } 1032*86126b77SFlorian Westphal 103321ee543eSMichal Kubecek return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); 103421ee543eSMichal Kubecek } 103521ee543eSMichal Kubecek 1036a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_spdinfo_msgsize(void) 10377deb2264SThomas Graf { 10387deb2264SThomas Graf return NLMSG_ALIGN(4) 10397deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_spdinfo)) 1040880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhinfo)) 1041880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)) 1042880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)); 10437deb2264SThomas Graf } 10447deb2264SThomas Graf 1045e071041bSAlexey Dobriyan static int build_spdinfo(struct sk_buff *skb, struct net *net, 104615e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 1047ecfd6b18SJamal Hadi Salim { 10485a6d3416SJamal Hadi Salim struct xfrmk_spdinfo si; 10495a6d3416SJamal Hadi Salim struct xfrmu_spdinfo spc; 10505a6d3416SJamal Hadi Salim struct xfrmu_spdhinfo sph; 1051880a6fabSChristophe Gouault struct xfrmu_spdhthresh spt4, spt6; 1052ecfd6b18SJamal Hadi Salim struct nlmsghdr *nlh; 10531d1e34ddSDavid S. Miller int err; 1054ecfd6b18SJamal Hadi Salim u32 *f; 1055880a6fabSChristophe Gouault unsigned lseq; 1056ecfd6b18SJamal Hadi Salim 105715e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); 105825985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 1059ecfd6b18SJamal Hadi Salim return -EMSGSIZE; 1060ecfd6b18SJamal Hadi Salim 1061ecfd6b18SJamal Hadi Salim f = nlmsg_data(nlh); 1062ecfd6b18SJamal Hadi Salim *f = flags; 1063e071041bSAlexey Dobriyan xfrm_spd_getinfo(net, &si); 10645a6d3416SJamal Hadi Salim spc.incnt = si.incnt; 10655a6d3416SJamal Hadi Salim spc.outcnt = si.outcnt; 10665a6d3416SJamal Hadi Salim spc.fwdcnt = si.fwdcnt; 10675a6d3416SJamal Hadi Salim spc.inscnt = si.inscnt; 10685a6d3416SJamal Hadi Salim spc.outscnt = si.outscnt; 10695a6d3416SJamal Hadi Salim spc.fwdscnt = si.fwdscnt; 10705a6d3416SJamal Hadi Salim sph.spdhcnt = si.spdhcnt; 10715a6d3416SJamal Hadi Salim sph.spdhmcnt = si.spdhmcnt; 1072ecfd6b18SJamal Hadi Salim 1073880a6fabSChristophe Gouault do { 1074880a6fabSChristophe Gouault lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); 1075880a6fabSChristophe Gouault 1076880a6fabSChristophe Gouault spt4.lbits = net->xfrm.policy_hthresh.lbits4; 1077880a6fabSChristophe Gouault spt4.rbits = net->xfrm.policy_hthresh.rbits4; 1078880a6fabSChristophe Gouault spt6.lbits = net->xfrm.policy_hthresh.lbits6; 1079880a6fabSChristophe Gouault spt6.rbits = net->xfrm.policy_hthresh.rbits6; 1080880a6fabSChristophe Gouault } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); 1081880a6fabSChristophe Gouault 10821d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); 10831d1e34ddSDavid S. Miller if (!err) 10841d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); 1085880a6fabSChristophe Gouault if (!err) 1086880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); 1087880a6fabSChristophe Gouault if (!err) 1088880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); 10891d1e34ddSDavid S. Miller if (err) { 10901d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 10911d1e34ddSDavid S. Miller return err; 10921d1e34ddSDavid S. Miller } 1093ecfd6b18SJamal Hadi Salim 1094053c095aSJohannes Berg nlmsg_end(skb, nlh); 1095053c095aSJohannes Berg return 0; 1096ecfd6b18SJamal Hadi Salim } 1097ecfd6b18SJamal Hadi Salim 1098880a6fabSChristophe Gouault static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 1099880a6fabSChristophe Gouault struct nlattr **attrs) 1100880a6fabSChristophe Gouault { 1101880a6fabSChristophe Gouault struct net *net = sock_net(skb->sk); 1102880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh4 = NULL; 1103880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh6 = NULL; 1104880a6fabSChristophe Gouault 1105880a6fabSChristophe Gouault /* selector prefixlen thresholds to hash policies */ 1106880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { 1107880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; 1108880a6fabSChristophe Gouault 1109880a6fabSChristophe Gouault if (nla_len(rta) < sizeof(*thresh4)) 1110880a6fabSChristophe Gouault return -EINVAL; 1111880a6fabSChristophe Gouault thresh4 = nla_data(rta); 1112880a6fabSChristophe Gouault if (thresh4->lbits > 32 || thresh4->rbits > 32) 1113880a6fabSChristophe Gouault return -EINVAL; 1114880a6fabSChristophe Gouault } 1115880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { 1116880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; 1117880a6fabSChristophe Gouault 1118880a6fabSChristophe Gouault if (nla_len(rta) < sizeof(*thresh6)) 1119880a6fabSChristophe Gouault return -EINVAL; 1120880a6fabSChristophe Gouault thresh6 = nla_data(rta); 1121880a6fabSChristophe Gouault if (thresh6->lbits > 128 || thresh6->rbits > 128) 1122880a6fabSChristophe Gouault return -EINVAL; 1123880a6fabSChristophe Gouault } 1124880a6fabSChristophe Gouault 1125880a6fabSChristophe Gouault if (thresh4 || thresh6) { 1126880a6fabSChristophe Gouault write_seqlock(&net->xfrm.policy_hthresh.lock); 1127880a6fabSChristophe Gouault if (thresh4) { 1128880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; 1129880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; 1130880a6fabSChristophe Gouault } 1131880a6fabSChristophe Gouault if (thresh6) { 1132880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; 1133880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; 1134880a6fabSChristophe Gouault } 1135880a6fabSChristophe Gouault write_sequnlock(&net->xfrm.policy_hthresh.lock); 1136880a6fabSChristophe Gouault 1137880a6fabSChristophe Gouault xfrm_policy_hash_rebuild(net); 1138880a6fabSChristophe Gouault } 1139880a6fabSChristophe Gouault 1140880a6fabSChristophe Gouault return 0; 1141880a6fabSChristophe Gouault } 1142880a6fabSChristophe Gouault 1143ecfd6b18SJamal Hadi Salim static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 11445424f32eSThomas Graf struct nlattr **attrs) 1145ecfd6b18SJamal Hadi Salim { 1146a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 1147ecfd6b18SJamal Hadi Salim struct sk_buff *r_skb; 11487b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 114915e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 1150ecfd6b18SJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 11512fc5f83bSGustavo A. R. Silva int err; 1152ecfd6b18SJamal Hadi Salim 11537deb2264SThomas Graf r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); 1154ecfd6b18SJamal Hadi Salim if (r_skb == NULL) 1155ecfd6b18SJamal Hadi Salim return -ENOMEM; 1156ecfd6b18SJamal Hadi Salim 11572fc5f83bSGustavo A. R. Silva err = build_spdinfo(r_skb, net, sportid, seq, *flags); 11582fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 1159ecfd6b18SJamal Hadi Salim 116015e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 1161ecfd6b18SJamal Hadi Salim } 1162ecfd6b18SJamal Hadi Salim 1163a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sadinfo_msgsize(void) 11647deb2264SThomas Graf { 11657deb2264SThomas Graf return NLMSG_ALIGN(4) 11667deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_sadhinfo)) 11677deb2264SThomas Graf + nla_total_size(4); /* XFRMA_SAD_CNT */ 11687deb2264SThomas Graf } 11697deb2264SThomas Graf 1170e071041bSAlexey Dobriyan static int build_sadinfo(struct sk_buff *skb, struct net *net, 117115e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 117228d8909bSJamal Hadi Salim { 1173af11e316SJamal Hadi Salim struct xfrmk_sadinfo si; 1174af11e316SJamal Hadi Salim struct xfrmu_sadhinfo sh; 117528d8909bSJamal Hadi Salim struct nlmsghdr *nlh; 11761d1e34ddSDavid S. Miller int err; 117728d8909bSJamal Hadi Salim u32 *f; 117828d8909bSJamal Hadi Salim 117915e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); 118025985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 118128d8909bSJamal Hadi Salim return -EMSGSIZE; 118228d8909bSJamal Hadi Salim 118328d8909bSJamal Hadi Salim f = nlmsg_data(nlh); 118428d8909bSJamal Hadi Salim *f = flags; 1185e071041bSAlexey Dobriyan xfrm_sad_getinfo(net, &si); 118628d8909bSJamal Hadi Salim 1187af11e316SJamal Hadi Salim sh.sadhmcnt = si.sadhmcnt; 1188af11e316SJamal Hadi Salim sh.sadhcnt = si.sadhcnt; 1189af11e316SJamal Hadi Salim 11901d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); 11911d1e34ddSDavid S. Miller if (!err) 11921d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); 11931d1e34ddSDavid S. Miller if (err) { 11941d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 11951d1e34ddSDavid S. Miller return err; 11961d1e34ddSDavid S. Miller } 119728d8909bSJamal Hadi Salim 1198053c095aSJohannes Berg nlmsg_end(skb, nlh); 1199053c095aSJohannes Berg return 0; 120028d8909bSJamal Hadi Salim } 120128d8909bSJamal Hadi Salim 120228d8909bSJamal Hadi Salim static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 12035424f32eSThomas Graf struct nlattr **attrs) 120428d8909bSJamal Hadi Salim { 1205a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 120628d8909bSJamal Hadi Salim struct sk_buff *r_skb; 12077b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 120815e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 120928d8909bSJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 12102fc5f83bSGustavo A. R. Silva int err; 121128d8909bSJamal Hadi Salim 12127deb2264SThomas Graf r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); 121328d8909bSJamal Hadi Salim if (r_skb == NULL) 121428d8909bSJamal Hadi Salim return -ENOMEM; 121528d8909bSJamal Hadi Salim 12162fc5f83bSGustavo A. R. Silva err = build_sadinfo(r_skb, net, sportid, seq, *flags); 12172fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 121828d8909bSJamal Hadi Salim 121915e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 122028d8909bSJamal Hadi Salim } 122128d8909bSJamal Hadi Salim 122222e70050SChristoph Hellwig static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 12235424f32eSThomas Graf struct nlattr **attrs) 12241da177e4SLinus Torvalds { 1225fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 12267b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 12271da177e4SLinus Torvalds struct xfrm_state *x; 12281da177e4SLinus Torvalds struct sk_buff *resp_skb; 1229eb2971b6SMasahide NAKAMURA int err = -ESRCH; 12301da177e4SLinus Torvalds 1231fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 12321da177e4SLinus Torvalds if (x == NULL) 12331da177e4SLinus Torvalds goto out_noput; 12341da177e4SLinus Torvalds 12351da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 12361da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 12371da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 12381da177e4SLinus Torvalds } else { 123915e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 12401da177e4SLinus Torvalds } 12411da177e4SLinus Torvalds xfrm_state_put(x); 12421da177e4SLinus Torvalds out_noput: 12431da177e4SLinus Torvalds return err; 12441da177e4SLinus Torvalds } 12451da177e4SLinus Torvalds 124622e70050SChristoph Hellwig static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, 12475424f32eSThomas Graf struct nlattr **attrs) 12481da177e4SLinus Torvalds { 1249fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 12501da177e4SLinus Torvalds struct xfrm_state *x; 12511da177e4SLinus Torvalds struct xfrm_userspi_info *p; 12521da177e4SLinus Torvalds struct sk_buff *resp_skb; 12531da177e4SLinus Torvalds xfrm_address_t *daddr; 12541da177e4SLinus Torvalds int family; 12551da177e4SLinus Torvalds int err; 12566f26b61eSJamal Hadi Salim u32 mark; 12576f26b61eSJamal Hadi Salim struct xfrm_mark m; 12581da177e4SLinus Torvalds 12597b67c857SThomas Graf p = nlmsg_data(nlh); 1260776e9dd9SFan Du err = verify_spi_info(p->info.id.proto, p->min, p->max); 12611da177e4SLinus Torvalds if (err) 12621da177e4SLinus Torvalds goto out_noput; 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds family = p->info.family; 12651da177e4SLinus Torvalds daddr = &p->info.id.daddr; 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds x = NULL; 12686f26b61eSJamal Hadi Salim 12696f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 12701da177e4SLinus Torvalds if (p->info.seq) { 12716f26b61eSJamal Hadi Salim x = xfrm_find_acq_byseq(net, mark, p->info.seq); 127270e94e66SYOSHIFUJI Hideaki / 吉藤英明 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { 12731da177e4SLinus Torvalds xfrm_state_put(x); 12741da177e4SLinus Torvalds x = NULL; 12751da177e4SLinus Torvalds } 12761da177e4SLinus Torvalds } 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds if (!x) 12796f26b61eSJamal Hadi Salim x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, 12801da177e4SLinus Torvalds p->info.id.proto, daddr, 12811da177e4SLinus Torvalds &p->info.saddr, 1, 12821da177e4SLinus Torvalds family); 12831da177e4SLinus Torvalds err = -ENOENT; 12841da177e4SLinus Torvalds if (x == NULL) 12851da177e4SLinus Torvalds goto out_noput; 12861da177e4SLinus Torvalds 1287658b219eSHerbert Xu err = xfrm_alloc_spi(x, p->min, p->max); 1288658b219eSHerbert Xu if (err) 1289658b219eSHerbert Xu goto out; 12901da177e4SLinus Torvalds 12911da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 12921da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 12931da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 12941da177e4SLinus Torvalds goto out; 12951da177e4SLinus Torvalds } 12961da177e4SLinus Torvalds 129715e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds out: 13001da177e4SLinus Torvalds xfrm_state_put(x); 13011da177e4SLinus Torvalds out_noput: 13021da177e4SLinus Torvalds return err; 13031da177e4SLinus Torvalds } 13041da177e4SLinus Torvalds 1305b798a9edSJamal Hadi Salim static int verify_policy_dir(u8 dir) 13061da177e4SLinus Torvalds { 13071da177e4SLinus Torvalds switch (dir) { 13081da177e4SLinus Torvalds case XFRM_POLICY_IN: 13091da177e4SLinus Torvalds case XFRM_POLICY_OUT: 13101da177e4SLinus Torvalds case XFRM_POLICY_FWD: 13111da177e4SLinus Torvalds break; 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds default: 13141da177e4SLinus Torvalds return -EINVAL; 13153ff50b79SStephen Hemminger } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds return 0; 13181da177e4SLinus Torvalds } 13191da177e4SLinus Torvalds 1320b798a9edSJamal Hadi Salim static int verify_policy_type(u8 type) 1321f7b6983fSMasahide NAKAMURA { 1322f7b6983fSMasahide NAKAMURA switch (type) { 1323f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_MAIN: 1324f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1325f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_SUB: 1326f7b6983fSMasahide NAKAMURA #endif 1327f7b6983fSMasahide NAKAMURA break; 1328f7b6983fSMasahide NAKAMURA 1329f7b6983fSMasahide NAKAMURA default: 1330f7b6983fSMasahide NAKAMURA return -EINVAL; 13313ff50b79SStephen Hemminger } 1332f7b6983fSMasahide NAKAMURA 1333f7b6983fSMasahide NAKAMURA return 0; 1334f7b6983fSMasahide NAKAMURA } 1335f7b6983fSMasahide NAKAMURA 13361da177e4SLinus Torvalds static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) 13371da177e4SLinus Torvalds { 1338e682adf0SFan Du int ret; 1339e682adf0SFan Du 13401da177e4SLinus Torvalds switch (p->share) { 13411da177e4SLinus Torvalds case XFRM_SHARE_ANY: 13421da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 13431da177e4SLinus Torvalds case XFRM_SHARE_USER: 13441da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 13451da177e4SLinus Torvalds break; 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds default: 13481da177e4SLinus Torvalds return -EINVAL; 13493ff50b79SStephen Hemminger } 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds switch (p->action) { 13521da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 13531da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 13541da177e4SLinus Torvalds break; 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds default: 13571da177e4SLinus Torvalds return -EINVAL; 13583ff50b79SStephen Hemminger } 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds switch (p->sel.family) { 13611da177e4SLinus Torvalds case AF_INET: 13621da177e4SLinus Torvalds break; 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds case AF_INET6: 1365dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 13661da177e4SLinus Torvalds break; 13671da177e4SLinus Torvalds #else 13681da177e4SLinus Torvalds return -EAFNOSUPPORT; 13691da177e4SLinus Torvalds #endif 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds default: 13721da177e4SLinus Torvalds return -EINVAL; 13733ff50b79SStephen Hemminger } 13741da177e4SLinus Torvalds 1375e682adf0SFan Du ret = verify_policy_dir(p->dir); 1376e682adf0SFan Du if (ret) 1377e682adf0SFan Du return ret; 1378e682adf0SFan Du if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir)) 1379e682adf0SFan Du return -EINVAL; 1380e682adf0SFan Du 1381e682adf0SFan Du return 0; 13821da177e4SLinus Torvalds } 13831da177e4SLinus Torvalds 13845424f32eSThomas Graf static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) 1385df71837dSTrent Jaeger { 13865424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 1387df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 1388df71837dSTrent Jaeger 1389df71837dSTrent Jaeger if (!rt) 1390df71837dSTrent Jaeger return 0; 1391df71837dSTrent Jaeger 13925424f32eSThomas Graf uctx = nla_data(rt); 139352a4c640SNikolay Aleksandrov return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); 1394df71837dSTrent Jaeger } 1395df71837dSTrent Jaeger 13961da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 13971da177e4SLinus Torvalds int nr) 13981da177e4SLinus Torvalds { 13991da177e4SLinus Torvalds int i; 14001da177e4SLinus Torvalds 14011da177e4SLinus Torvalds xp->xfrm_nr = nr; 14021da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 14031da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 14061da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 14071da177e4SLinus Torvalds sizeof(xfrm_address_t)); 14081da177e4SLinus Torvalds t->reqid = ut->reqid; 14091da177e4SLinus Torvalds t->mode = ut->mode; 14101da177e4SLinus Torvalds t->share = ut->share; 14111da177e4SLinus Torvalds t->optional = ut->optional; 14121da177e4SLinus Torvalds t->aalgos = ut->aalgos; 14131da177e4SLinus Torvalds t->ealgos = ut->ealgos; 14141da177e4SLinus Torvalds t->calgos = ut->calgos; 1415c5d18e98SHerbert Xu /* If all masks are ~0, then we allow all algorithms. */ 1416c5d18e98SHerbert Xu t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); 14178511d01dSMiika Komu t->encap_family = ut->family; 14181da177e4SLinus Torvalds } 14191da177e4SLinus Torvalds } 14201da177e4SLinus Torvalds 1421b4ad86bfSDavid S. Miller static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) 1422b4ad86bfSDavid S. Miller { 1423732706afSSteffen Klassert u16 prev_family; 1424b4ad86bfSDavid S. Miller int i; 1425b4ad86bfSDavid S. Miller 1426b4ad86bfSDavid S. Miller if (nr > XFRM_MAX_DEPTH) 1427b4ad86bfSDavid S. Miller return -EINVAL; 1428b4ad86bfSDavid S. Miller 1429732706afSSteffen Klassert prev_family = family; 1430732706afSSteffen Klassert 1431b4ad86bfSDavid S. Miller for (i = 0; i < nr; i++) { 1432b4ad86bfSDavid S. Miller /* We never validated the ut->family value, so many 1433b4ad86bfSDavid S. Miller * applications simply leave it at zero. The check was 1434b4ad86bfSDavid S. Miller * never made and ut->family was ignored because all 1435b4ad86bfSDavid S. Miller * templates could be assumed to have the same family as 1436b4ad86bfSDavid S. Miller * the policy itself. Now that we will have ipv4-in-ipv6 1437b4ad86bfSDavid S. Miller * and ipv6-in-ipv4 tunnels, this is no longer true. 1438b4ad86bfSDavid S. Miller */ 1439b4ad86bfSDavid S. Miller if (!ut[i].family) 1440b4ad86bfSDavid S. Miller ut[i].family = family; 1441b4ad86bfSDavid S. Miller 1442732706afSSteffen Klassert if ((ut[i].mode == XFRM_MODE_TRANSPORT) && 1443732706afSSteffen Klassert (ut[i].family != prev_family)) 1444732706afSSteffen Klassert return -EINVAL; 1445732706afSSteffen Klassert 1446732706afSSteffen Klassert prev_family = ut[i].family; 1447732706afSSteffen Klassert 1448b4ad86bfSDavid S. Miller switch (ut[i].family) { 1449b4ad86bfSDavid S. Miller case AF_INET: 1450b4ad86bfSDavid S. Miller break; 1451dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 1452b4ad86bfSDavid S. Miller case AF_INET6: 1453b4ad86bfSDavid S. Miller break; 1454b4ad86bfSDavid S. Miller #endif 1455b4ad86bfSDavid S. Miller default: 1456b4ad86bfSDavid S. Miller return -EINVAL; 14573ff50b79SStephen Hemminger } 14586a53b759SCong Wang 14596a53b759SCong Wang switch (ut[i].id.proto) { 14606a53b759SCong Wang case IPPROTO_AH: 14616a53b759SCong Wang case IPPROTO_ESP: 14626a53b759SCong Wang case IPPROTO_COMP: 14636a53b759SCong Wang #if IS_ENABLED(CONFIG_IPV6) 14646a53b759SCong Wang case IPPROTO_ROUTING: 14656a53b759SCong Wang case IPPROTO_DSTOPTS: 14666a53b759SCong Wang #endif 14676a53b759SCong Wang case IPSEC_PROTO_ANY: 14686a53b759SCong Wang break; 14696a53b759SCong Wang default: 14706a53b759SCong Wang return -EINVAL; 14716a53b759SCong Wang } 14726a53b759SCong Wang 1473b4ad86bfSDavid S. Miller } 1474b4ad86bfSDavid S. Miller 1475b4ad86bfSDavid S. Miller return 0; 1476b4ad86bfSDavid S. Miller } 1477b4ad86bfSDavid S. Miller 14785424f32eSThomas Graf static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) 14791da177e4SLinus Torvalds { 14805424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 14811da177e4SLinus Torvalds 14821da177e4SLinus Torvalds if (!rt) { 14831da177e4SLinus Torvalds pol->xfrm_nr = 0; 14841da177e4SLinus Torvalds } else { 14855424f32eSThomas Graf struct xfrm_user_tmpl *utmpl = nla_data(rt); 14865424f32eSThomas Graf int nr = nla_len(rt) / sizeof(*utmpl); 1487b4ad86bfSDavid S. Miller int err; 14881da177e4SLinus Torvalds 1489b4ad86bfSDavid S. Miller err = validate_tmpl(nr, utmpl, pol->family); 1490b4ad86bfSDavid S. Miller if (err) 1491b4ad86bfSDavid S. Miller return err; 14921da177e4SLinus Torvalds 14935424f32eSThomas Graf copy_templates(pol, utmpl, nr); 14941da177e4SLinus Torvalds } 14951da177e4SLinus Torvalds return 0; 14961da177e4SLinus Torvalds } 14971da177e4SLinus Torvalds 14985424f32eSThomas Graf static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) 1499f7b6983fSMasahide NAKAMURA { 15005424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; 1501f7b6983fSMasahide NAKAMURA struct xfrm_userpolicy_type *upt; 1502b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 1503f7b6983fSMasahide NAKAMURA int err; 1504f7b6983fSMasahide NAKAMURA 1505f7b6983fSMasahide NAKAMURA if (rt) { 15065424f32eSThomas Graf upt = nla_data(rt); 1507f7b6983fSMasahide NAKAMURA type = upt->type; 1508f7b6983fSMasahide NAKAMURA } 1509f7b6983fSMasahide NAKAMURA 1510f7b6983fSMasahide NAKAMURA err = verify_policy_type(type); 1511f7b6983fSMasahide NAKAMURA if (err) 1512f7b6983fSMasahide NAKAMURA return err; 1513f7b6983fSMasahide NAKAMURA 1514f7b6983fSMasahide NAKAMURA *tp = type; 1515f7b6983fSMasahide NAKAMURA return 0; 1516f7b6983fSMasahide NAKAMURA } 1517f7b6983fSMasahide NAKAMURA 15181da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 15191da177e4SLinus Torvalds { 15201da177e4SLinus Torvalds xp->priority = p->priority; 15211da177e4SLinus Torvalds xp->index = p->index; 15221da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 15231da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 15241da177e4SLinus Torvalds xp->action = p->action; 15251da177e4SLinus Torvalds xp->flags = p->flags; 15261da177e4SLinus Torvalds xp->family = p->sel.family; 15271da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 15281da177e4SLinus Torvalds } 15291da177e4SLinus Torvalds 15301da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 15311da177e4SLinus Torvalds { 15327b789836SMathias Krause memset(p, 0, sizeof(*p)); 15331da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 15341da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 15351da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 15361da177e4SLinus Torvalds p->priority = xp->priority; 15371da177e4SLinus Torvalds p->index = xp->index; 15381da177e4SLinus Torvalds p->sel.family = xp->family; 15391da177e4SLinus Torvalds p->dir = dir; 15401da177e4SLinus Torvalds p->action = xp->action; 15411da177e4SLinus Torvalds p->flags = xp->flags; 15421da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 15431da177e4SLinus Torvalds } 15441da177e4SLinus Torvalds 1545fc34acd3SAlexey Dobriyan static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) 15461da177e4SLinus Torvalds { 1547fc34acd3SAlexey Dobriyan struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); 15481da177e4SLinus Torvalds int err; 15491da177e4SLinus Torvalds 15501da177e4SLinus Torvalds if (!xp) { 15511da177e4SLinus Torvalds *errp = -ENOMEM; 15521da177e4SLinus Torvalds return NULL; 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds 15551da177e4SLinus Torvalds copy_from_user_policy(xp, p); 1556df71837dSTrent Jaeger 155735a7aa08SThomas Graf err = copy_from_user_policy_type(&xp->type, attrs); 1558f7b6983fSMasahide NAKAMURA if (err) 1559f7b6983fSMasahide NAKAMURA goto error; 1560f7b6983fSMasahide NAKAMURA 156135a7aa08SThomas Graf if (!(err = copy_from_user_tmpl(xp, attrs))) 156235a7aa08SThomas Graf err = copy_from_user_sec_ctx(xp, attrs); 1563f7b6983fSMasahide NAKAMURA if (err) 1564f7b6983fSMasahide NAKAMURA goto error; 15651da177e4SLinus Torvalds 1566295fae56SJamal Hadi Salim xfrm_mark_get(attrs, &xp->mark); 1567295fae56SJamal Hadi Salim 15681da177e4SLinus Torvalds return xp; 1569f7b6983fSMasahide NAKAMURA error: 1570f7b6983fSMasahide NAKAMURA *errp = err; 157112a169e7SHerbert Xu xp->walk.dead = 1; 157264c31b3fSWANG Cong xfrm_policy_destroy(xp); 1573f7b6983fSMasahide NAKAMURA return NULL; 15741da177e4SLinus Torvalds } 15751da177e4SLinus Torvalds 157622e70050SChristoph Hellwig static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 15775424f32eSThomas Graf struct nlattr **attrs) 15781da177e4SLinus Torvalds { 1579fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 15807b67c857SThomas Graf struct xfrm_userpolicy_info *p = nlmsg_data(nlh); 15811da177e4SLinus Torvalds struct xfrm_policy *xp; 158226b15dadSJamal Hadi Salim struct km_event c; 15831da177e4SLinus Torvalds int err; 15841da177e4SLinus Torvalds int excl; 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds err = verify_newpolicy_info(p); 15871da177e4SLinus Torvalds if (err) 15881da177e4SLinus Torvalds return err; 158935a7aa08SThomas Graf err = verify_sec_ctx_len(attrs); 1590df71837dSTrent Jaeger if (err) 1591df71837dSTrent Jaeger return err; 15921da177e4SLinus Torvalds 1593fc34acd3SAlexey Dobriyan xp = xfrm_policy_construct(net, p, attrs, &err); 15941da177e4SLinus Torvalds if (!xp) 15951da177e4SLinus Torvalds return err; 15961da177e4SLinus Torvalds 159725985edcSLucas De Marchi /* shouldn't excl be based on nlh flags?? 159826b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 159926b15dadSJamal Hadi Salim * in netlink excl is a flag and you wouldnt need 160026b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 16011da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 16021da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 16032e71029eSTetsuo Handa xfrm_audit_policy_add(xp, err ? 0 : 1, true); 1604161a09e7SJoy Latten 16051da177e4SLinus Torvalds if (err) { 160603e1ad7bSPaul Moore security_xfrm_policy_free(xp->security); 16071da177e4SLinus Torvalds kfree(xp); 16081da177e4SLinus Torvalds return err; 16091da177e4SLinus Torvalds } 16101da177e4SLinus Torvalds 1611f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 161226b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 161315e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 161426b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 161526b15dadSJamal Hadi Salim 16161da177e4SLinus Torvalds xfrm_pol_put(xp); 16171da177e4SLinus Torvalds 16181da177e4SLinus Torvalds return 0; 16191da177e4SLinus Torvalds } 16201da177e4SLinus Torvalds 16211da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 16221da177e4SLinus Torvalds { 16231da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 16241da177e4SLinus Torvalds int i; 16251da177e4SLinus Torvalds 16261da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 16271da177e4SLinus Torvalds return 0; 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 16301da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 16311da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 16321da177e4SLinus Torvalds 16331f86840fSMathias Krause memset(up, 0, sizeof(*up)); 16341da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 16358511d01dSMiika Komu up->family = kp->encap_family; 16361da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 16371da177e4SLinus Torvalds up->reqid = kp->reqid; 16381da177e4SLinus Torvalds up->mode = kp->mode; 16391da177e4SLinus Torvalds up->share = kp->share; 16401da177e4SLinus Torvalds up->optional = kp->optional; 16411da177e4SLinus Torvalds up->aalgos = kp->aalgos; 16421da177e4SLinus Torvalds up->ealgos = kp->ealgos; 16431da177e4SLinus Torvalds up->calgos = kp->calgos; 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds 1646c0144beaSThomas Graf return nla_put(skb, XFRMA_TMPL, 1647c0144beaSThomas Graf sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); 1648df71837dSTrent Jaeger } 1649df71837dSTrent Jaeger 16500d681623SSerge Hallyn static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) 16510d681623SSerge Hallyn { 16520d681623SSerge Hallyn if (x->security) { 16530d681623SSerge Hallyn return copy_sec_ctx(x->security, skb); 16540d681623SSerge Hallyn } 16550d681623SSerge Hallyn return 0; 16560d681623SSerge Hallyn } 16570d681623SSerge Hallyn 16580d681623SSerge Hallyn static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) 16590d681623SSerge Hallyn { 16601d1e34ddSDavid S. Miller if (xp->security) 16610d681623SSerge Hallyn return copy_sec_ctx(xp->security, skb); 16620d681623SSerge Hallyn return 0; 16630d681623SSerge Hallyn } 1664a1b831f2SAlexey Dobriyan static inline unsigned int userpolicy_type_attrsize(void) 1665cfbfd45aSThomas Graf { 1666cfbfd45aSThomas Graf #ifdef CONFIG_XFRM_SUB_POLICY 1667cfbfd45aSThomas Graf return nla_total_size(sizeof(struct xfrm_userpolicy_type)); 1668cfbfd45aSThomas Graf #else 1669cfbfd45aSThomas Graf return 0; 1670cfbfd45aSThomas Graf #endif 1671cfbfd45aSThomas Graf } 16720d681623SSerge Hallyn 1673f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1674b798a9edSJamal Hadi Salim static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 1675f7b6983fSMasahide NAKAMURA { 167645c180bcSEric Dumazet struct xfrm_userpolicy_type upt; 167745c180bcSEric Dumazet 167845c180bcSEric Dumazet /* Sadly there are two holes in struct xfrm_userpolicy_type */ 167945c180bcSEric Dumazet memset(&upt, 0, sizeof(upt)); 168045c180bcSEric Dumazet upt.type = type; 1681f7b6983fSMasahide NAKAMURA 1682c0144beaSThomas Graf return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); 1683f7b6983fSMasahide NAKAMURA } 1684f7b6983fSMasahide NAKAMURA 1685f7b6983fSMasahide NAKAMURA #else 1686b798a9edSJamal Hadi Salim static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 1687f7b6983fSMasahide NAKAMURA { 1688f7b6983fSMasahide NAKAMURA return 0; 1689f7b6983fSMasahide NAKAMURA } 1690f7b6983fSMasahide NAKAMURA #endif 1691f7b6983fSMasahide NAKAMURA 16921da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 16931da177e4SLinus Torvalds { 16941da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 16951da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 16961da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 16971da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 16981da177e4SLinus Torvalds struct nlmsghdr *nlh; 16991d1e34ddSDavid S. Miller int err; 17001da177e4SLinus Torvalds 170115e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 170279b8b7f4SThomas Graf XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); 170379b8b7f4SThomas Graf if (nlh == NULL) 170479b8b7f4SThomas Graf return -EMSGSIZE; 17051da177e4SLinus Torvalds 17067b67c857SThomas Graf p = nlmsg_data(nlh); 17071da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 17081d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 17091d1e34ddSDavid S. Miller if (!err) 17101d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 17111d1e34ddSDavid S. Miller if (!err) 17121d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 17131d1e34ddSDavid S. Miller if (!err) 17141d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 17151d1e34ddSDavid S. Miller if (err) { 17161d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 17171d1e34ddSDavid S. Miller return err; 17181d1e34ddSDavid S. Miller } 17199825069dSThomas Graf nlmsg_end(skb, nlh); 17201da177e4SLinus Torvalds return 0; 17211da177e4SLinus Torvalds } 17221da177e4SLinus Torvalds 17234c563f76STimo Teras static int xfrm_dump_policy_done(struct netlink_callback *cb) 17244c563f76STimo Teras { 17251137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 1726283bc9f3SFan Du struct net *net = sock_net(cb->skb->sk); 17274c563f76STimo Teras 1728283bc9f3SFan Du xfrm_policy_walk_done(walk, net); 17294c563f76STimo Teras return 0; 17304c563f76STimo Teras } 17314c563f76STimo Teras 17321137b5e2SHerbert Xu static int xfrm_dump_policy_start(struct netlink_callback *cb) 17331137b5e2SHerbert Xu { 17341137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 17351137b5e2SHerbert Xu 17361137b5e2SHerbert Xu BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args)); 17371137b5e2SHerbert Xu 17381137b5e2SHerbert Xu xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); 17391137b5e2SHerbert Xu return 0; 17401137b5e2SHerbert Xu } 17411137b5e2SHerbert Xu 17421da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 17431da177e4SLinus Torvalds { 1744fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 17451137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 17461da177e4SLinus Torvalds struct xfrm_dump_info info; 17471da177e4SLinus Torvalds 17481da177e4SLinus Torvalds info.in_skb = cb->skb; 17491da177e4SLinus Torvalds info.out_skb = skb; 17501da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 17511da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 17524c563f76STimo Teras 1753fc34acd3SAlexey Dobriyan (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds return skb->len; 17561da177e4SLinus Torvalds } 17571da177e4SLinus Torvalds 17581da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 17591da177e4SLinus Torvalds struct xfrm_policy *xp, 17601da177e4SLinus Torvalds int dir, u32 seq) 17611da177e4SLinus Torvalds { 17621da177e4SLinus Torvalds struct xfrm_dump_info info; 17631da177e4SLinus Torvalds struct sk_buff *skb; 1764c2546372SMathias Krause int err; 17651da177e4SLinus Torvalds 17667deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 17671da177e4SLinus Torvalds if (!skb) 17681da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 17691da177e4SLinus Torvalds 17701da177e4SLinus Torvalds info.in_skb = in_skb; 17711da177e4SLinus Torvalds info.out_skb = skb; 17721da177e4SLinus Torvalds info.nlmsg_seq = seq; 17731da177e4SLinus Torvalds info.nlmsg_flags = 0; 17741da177e4SLinus Torvalds 1775c2546372SMathias Krause err = dump_one_policy(xp, dir, 0, &info); 1776c2546372SMathias Krause if (err) { 17771da177e4SLinus Torvalds kfree_skb(skb); 1778c2546372SMathias Krause return ERR_PTR(err); 17791da177e4SLinus Torvalds } 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvalds return skb; 17821da177e4SLinus Torvalds } 17831da177e4SLinus Torvalds 178422e70050SChristoph Hellwig static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 17855424f32eSThomas Graf struct nlattr **attrs) 17861da177e4SLinus Torvalds { 1787fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 17881da177e4SLinus Torvalds struct xfrm_policy *xp; 17891da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 1790b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 17911da177e4SLinus Torvalds int err; 179226b15dadSJamal Hadi Salim struct km_event c; 17931da177e4SLinus Torvalds int delete; 1794295fae56SJamal Hadi Salim struct xfrm_mark m; 1795295fae56SJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 17961da177e4SLinus Torvalds 17977b67c857SThomas Graf p = nlmsg_data(nlh); 17981da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 17991da177e4SLinus Torvalds 180035a7aa08SThomas Graf err = copy_from_user_policy_type(&type, attrs); 1801f7b6983fSMasahide NAKAMURA if (err) 1802f7b6983fSMasahide NAKAMURA return err; 1803f7b6983fSMasahide NAKAMURA 18041da177e4SLinus Torvalds err = verify_policy_dir(p->dir); 18051da177e4SLinus Torvalds if (err) 18061da177e4SLinus Torvalds return err; 18071da177e4SLinus Torvalds 18081da177e4SLinus Torvalds if (p->index) 1809295fae56SJamal Hadi Salim xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); 1810df71837dSTrent Jaeger else { 18115424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 181203e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 1813df71837dSTrent Jaeger 181435a7aa08SThomas Graf err = verify_sec_ctx_len(attrs); 1815df71837dSTrent Jaeger if (err) 1816df71837dSTrent Jaeger return err; 1817df71837dSTrent Jaeger 18182c8dd116SDenis V. Lunev ctx = NULL; 1819df71837dSTrent Jaeger if (rt) { 18205424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 1821df71837dSTrent Jaeger 182252a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 182303e1ad7bSPaul Moore if (err) 1824df71837dSTrent Jaeger return err; 18252c8dd116SDenis V. Lunev } 1826295fae56SJamal Hadi Salim xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, 18276f26b61eSJamal Hadi Salim ctx, delete, &err); 182803e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 1829df71837dSTrent Jaeger } 18301da177e4SLinus Torvalds if (xp == NULL) 18311da177e4SLinus Torvalds return -ENOENT; 18321da177e4SLinus Torvalds 18331da177e4SLinus Torvalds if (!delete) { 18341da177e4SLinus Torvalds struct sk_buff *resp_skb; 18351da177e4SLinus Torvalds 18361da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 18371da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 18381da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 18391da177e4SLinus Torvalds } else { 1840a6483b79SAlexey Dobriyan err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, 184115e47304SEric W. Biederman NETLINK_CB(skb).portid); 18421da177e4SLinus Torvalds } 184326b15dadSJamal Hadi Salim } else { 18442e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, err ? 0 : 1, true); 184513fcfbb0SDavid S. Miller 184613fcfbb0SDavid S. Miller if (err != 0) 1847c8c05a8eSCatherine Zhang goto out; 184813fcfbb0SDavid S. Miller 1849e7443892SHerbert Xu c.data.byid = p->index; 1850f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 185126b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 185215e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 185326b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 18541da177e4SLinus Torvalds } 18551da177e4SLinus Torvalds 1856c8c05a8eSCatherine Zhang out: 1857ef41aaa0SEric Paris xfrm_pol_put(xp); 18581da177e4SLinus Torvalds return err; 18591da177e4SLinus Torvalds } 18601da177e4SLinus Torvalds 186122e70050SChristoph Hellwig static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 18625424f32eSThomas Graf struct nlattr **attrs) 18631da177e4SLinus Torvalds { 1864fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 186526b15dadSJamal Hadi Salim struct km_event c; 18667b67c857SThomas Graf struct xfrm_usersa_flush *p = nlmsg_data(nlh); 18674aa2e62cSJoy Latten int err; 18681da177e4SLinus Torvalds 18692e71029eSTetsuo Handa err = xfrm_state_flush(net, p->proto, true); 18709e64cc95SJamal Hadi Salim if (err) { 18719e64cc95SJamal Hadi Salim if (err == -ESRCH) /* empty table */ 18729e64cc95SJamal Hadi Salim return 0; 1873069c474eSDavid S. Miller return err; 18749e64cc95SJamal Hadi Salim } 1875bf08867fSHerbert Xu c.data.proto = p->proto; 1876f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 187726b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 187815e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 18797067802eSAlexey Dobriyan c.net = net; 188026b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 188126b15dadSJamal Hadi Salim 18821da177e4SLinus Torvalds return 0; 18831da177e4SLinus Torvalds } 18841da177e4SLinus Torvalds 1885a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x) 18867deb2264SThomas Graf { 1887a1b831f2SAlexey Dobriyan unsigned int replay_size = x->replay_esn ? 1888d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn) : 1889d8647b79SSteffen Klassert sizeof(struct xfrm_replay_state); 1890d8647b79SSteffen Klassert 18917deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) 1892d8647b79SSteffen Klassert + nla_total_size(replay_size) 1893de95c4a4SNicolas Dichtel + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur)) 18946f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 18957deb2264SThomas Graf + nla_total_size(4) /* XFRM_AE_RTHR */ 18967deb2264SThomas Graf + nla_total_size(4); /* XFRM_AE_ETHR */ 18977deb2264SThomas Graf } 1898d51d081dSJamal Hadi Salim 1899214e005bSDavid S. Miller static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 1900d51d081dSJamal Hadi Salim { 1901d51d081dSJamal Hadi Salim struct xfrm_aevent_id *id; 1902d51d081dSJamal Hadi Salim struct nlmsghdr *nlh; 19031d1e34ddSDavid S. Miller int err; 1904d51d081dSJamal Hadi Salim 190515e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); 190679b8b7f4SThomas Graf if (nlh == NULL) 190779b8b7f4SThomas Graf return -EMSGSIZE; 1908d51d081dSJamal Hadi Salim 19097b67c857SThomas Graf id = nlmsg_data(nlh); 1910931e79d7SMathias Krause memset(&id->sa_id, 0, sizeof(id->sa_id)); 19112b5f6dccSJamal Hadi Salim memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); 1912d51d081dSJamal Hadi Salim id->sa_id.spi = x->id.spi; 1913d51d081dSJamal Hadi Salim id->sa_id.family = x->props.family; 1914d51d081dSJamal Hadi Salim id->sa_id.proto = x->id.proto; 19152b5f6dccSJamal Hadi Salim memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); 19162b5f6dccSJamal Hadi Salim id->reqid = x->props.reqid; 1917d51d081dSJamal Hadi Salim id->flags = c->data.aevent; 1918d51d081dSJamal Hadi Salim 1919d0fde795SDavid S. Miller if (x->replay_esn) { 19201d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 1921d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 19221d1e34ddSDavid S. Miller x->replay_esn); 1923d0fde795SDavid S. Miller } else { 19241d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 19251d1e34ddSDavid S. Miller &x->replay); 1926d0fde795SDavid S. Miller } 19271d1e34ddSDavid S. Miller if (err) 19281d1e34ddSDavid S. Miller goto out_cancel; 1929de95c4a4SNicolas Dichtel err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft, 1930de95c4a4SNicolas Dichtel XFRMA_PAD); 19311d1e34ddSDavid S. Miller if (err) 19321d1e34ddSDavid S. Miller goto out_cancel; 1933d8647b79SSteffen Klassert 19341d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_RTHR) { 19351d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); 19361d1e34ddSDavid S. Miller if (err) 19371d1e34ddSDavid S. Miller goto out_cancel; 19381d1e34ddSDavid S. Miller } 19391d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_ETHR) { 19401d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, 19411d1e34ddSDavid S. Miller x->replay_maxage * 10 / HZ); 19421d1e34ddSDavid S. Miller if (err) 19431d1e34ddSDavid S. Miller goto out_cancel; 19441d1e34ddSDavid S. Miller } 19451d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 19461d1e34ddSDavid S. Miller if (err) 19471d1e34ddSDavid S. Miller goto out_cancel; 19486f26b61eSJamal Hadi Salim 1949053c095aSJohannes Berg nlmsg_end(skb, nlh); 1950053c095aSJohannes Berg return 0; 1951d51d081dSJamal Hadi Salim 19521d1e34ddSDavid S. Miller out_cancel: 19539825069dSThomas Graf nlmsg_cancel(skb, nlh); 19541d1e34ddSDavid S. Miller return err; 1955d51d081dSJamal Hadi Salim } 1956d51d081dSJamal Hadi Salim 195722e70050SChristoph Hellwig static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 19585424f32eSThomas Graf struct nlattr **attrs) 1959d51d081dSJamal Hadi Salim { 1960fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 1961d51d081dSJamal Hadi Salim struct xfrm_state *x; 1962d51d081dSJamal Hadi Salim struct sk_buff *r_skb; 1963d51d081dSJamal Hadi Salim int err; 1964d51d081dSJamal Hadi Salim struct km_event c; 19656f26b61eSJamal Hadi Salim u32 mark; 19666f26b61eSJamal Hadi Salim struct xfrm_mark m; 19677b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 1968d51d081dSJamal Hadi Salim struct xfrm_usersa_id *id = &p->sa_id; 1969d51d081dSJamal Hadi Salim 19706f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 19716f26b61eSJamal Hadi Salim 19726f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); 1973d8647b79SSteffen Klassert if (x == NULL) 1974d51d081dSJamal Hadi Salim return -ESRCH; 1975d8647b79SSteffen Klassert 1976d8647b79SSteffen Klassert r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 1977d8647b79SSteffen Klassert if (r_skb == NULL) { 1978d8647b79SSteffen Klassert xfrm_state_put(x); 1979d8647b79SSteffen Klassert return -ENOMEM; 1980d51d081dSJamal Hadi Salim } 1981d51d081dSJamal Hadi Salim 1982d51d081dSJamal Hadi Salim /* 1983d51d081dSJamal Hadi Salim * XXX: is this lock really needed - none of the other 1984d51d081dSJamal Hadi Salim * gets lock (the concern is things getting updated 1985d51d081dSJamal Hadi Salim * while we are still reading) - jhs 1986d51d081dSJamal Hadi Salim */ 1987d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 1988d51d081dSJamal Hadi Salim c.data.aevent = p->flags; 1989d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 199015e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 1991d51d081dSJamal Hadi Salim 19922fc5f83bSGustavo A. R. Silva err = build_aevent(r_skb, x, &c); 19932fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 19942fc5f83bSGustavo A. R. Silva 199515e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); 1996d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 1997d51d081dSJamal Hadi Salim xfrm_state_put(x); 1998d51d081dSJamal Hadi Salim return err; 1999d51d081dSJamal Hadi Salim } 2000d51d081dSJamal Hadi Salim 200122e70050SChristoph Hellwig static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 20025424f32eSThomas Graf struct nlattr **attrs) 2003d51d081dSJamal Hadi Salim { 2004fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2005d51d081dSJamal Hadi Salim struct xfrm_state *x; 2006d51d081dSJamal Hadi Salim struct km_event c; 2007d51d081dSJamal Hadi Salim int err = -EINVAL; 20086f26b61eSJamal Hadi Salim u32 mark = 0; 20096f26b61eSJamal Hadi Salim struct xfrm_mark m; 20107b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 20115424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 2012d8647b79SSteffen Klassert struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; 20135424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 20144e077237SMichael Rossberg struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 20154e077237SMichael Rossberg struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 2016d51d081dSJamal Hadi Salim 20174e077237SMichael Rossberg if (!lt && !rp && !re && !et && !rt) 2018d51d081dSJamal Hadi Salim return err; 2019d51d081dSJamal Hadi Salim 2020d51d081dSJamal Hadi Salim /* pedantic mode - thou shalt sayeth replaceth */ 2021d51d081dSJamal Hadi Salim if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) 2022d51d081dSJamal Hadi Salim return err; 2023d51d081dSJamal Hadi Salim 20246f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 20256f26b61eSJamal Hadi Salim 20266f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); 2027d51d081dSJamal Hadi Salim if (x == NULL) 2028d51d081dSJamal Hadi Salim return -ESRCH; 2029d51d081dSJamal Hadi Salim 2030d51d081dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 2031d51d081dSJamal Hadi Salim goto out; 2032d51d081dSJamal Hadi Salim 20334479ff76SSteffen Klassert err = xfrm_replay_verify_len(x->replay_esn, re); 2034e2b19125SSteffen Klassert if (err) 2035e2b19125SSteffen Klassert goto out; 2036e2b19125SSteffen Klassert 2037d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 2038e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 1); 2039d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 2040d51d081dSJamal Hadi Salim 2041d51d081dSJamal Hadi Salim c.event = nlh->nlmsg_type; 2042d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 204315e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 2044d51d081dSJamal Hadi Salim c.data.aevent = XFRM_AE_CU; 2045d51d081dSJamal Hadi Salim km_state_notify(x, &c); 2046d51d081dSJamal Hadi Salim err = 0; 2047d51d081dSJamal Hadi Salim out: 2048d51d081dSJamal Hadi Salim xfrm_state_put(x); 2049d51d081dSJamal Hadi Salim return err; 2050d51d081dSJamal Hadi Salim } 2051d51d081dSJamal Hadi Salim 205222e70050SChristoph Hellwig static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 20535424f32eSThomas Graf struct nlattr **attrs) 20541da177e4SLinus Torvalds { 2055fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 205626b15dadSJamal Hadi Salim struct km_event c; 2057b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 2058f7b6983fSMasahide NAKAMURA int err; 205926b15dadSJamal Hadi Salim 206035a7aa08SThomas Graf err = copy_from_user_policy_type(&type, attrs); 2061f7b6983fSMasahide NAKAMURA if (err) 2062f7b6983fSMasahide NAKAMURA return err; 2063f7b6983fSMasahide NAKAMURA 20642e71029eSTetsuo Handa err = xfrm_policy_flush(net, type, true); 20652f1eb65fSJamal Hadi Salim if (err) { 20662f1eb65fSJamal Hadi Salim if (err == -ESRCH) /* empty table */ 20672f1eb65fSJamal Hadi Salim return 0; 2068069c474eSDavid S. Miller return err; 20692f1eb65fSJamal Hadi Salim } 20702f1eb65fSJamal Hadi Salim 2071f7b6983fSMasahide NAKAMURA c.data.type = type; 2072f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 207326b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 207415e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 20757067802eSAlexey Dobriyan c.net = net; 207626b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 20771da177e4SLinus Torvalds return 0; 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds 208022e70050SChristoph Hellwig static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 20815424f32eSThomas Graf struct nlattr **attrs) 20826c5c8ca7SJamal Hadi Salim { 2083fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 20846c5c8ca7SJamal Hadi Salim struct xfrm_policy *xp; 20857b67c857SThomas Graf struct xfrm_user_polexpire *up = nlmsg_data(nlh); 20866c5c8ca7SJamal Hadi Salim struct xfrm_userpolicy_info *p = &up->pol; 2087b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 20886c5c8ca7SJamal Hadi Salim int err = -ENOENT; 2089295fae56SJamal Hadi Salim struct xfrm_mark m; 2090295fae56SJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 20916c5c8ca7SJamal Hadi Salim 209235a7aa08SThomas Graf err = copy_from_user_policy_type(&type, attrs); 2093f7b6983fSMasahide NAKAMURA if (err) 2094f7b6983fSMasahide NAKAMURA return err; 2095f7b6983fSMasahide NAKAMURA 2096c8bf4d04STimo Teräs err = verify_policy_dir(p->dir); 2097c8bf4d04STimo Teräs if (err) 2098c8bf4d04STimo Teräs return err; 2099c8bf4d04STimo Teräs 21006c5c8ca7SJamal Hadi Salim if (p->index) 2101295fae56SJamal Hadi Salim xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); 21026c5c8ca7SJamal Hadi Salim else { 21035424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 210403e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 21056c5c8ca7SJamal Hadi Salim 210635a7aa08SThomas Graf err = verify_sec_ctx_len(attrs); 21076c5c8ca7SJamal Hadi Salim if (err) 21086c5c8ca7SJamal Hadi Salim return err; 21096c5c8ca7SJamal Hadi Salim 21102c8dd116SDenis V. Lunev ctx = NULL; 21116c5c8ca7SJamal Hadi Salim if (rt) { 21125424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 21136c5c8ca7SJamal Hadi Salim 211452a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 211503e1ad7bSPaul Moore if (err) 21166c5c8ca7SJamal Hadi Salim return err; 21172c8dd116SDenis V. Lunev } 2118295fae56SJamal Hadi Salim xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, 21196f26b61eSJamal Hadi Salim &p->sel, ctx, 0, &err); 212003e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 21216c5c8ca7SJamal Hadi Salim } 21226c5c8ca7SJamal Hadi Salim if (xp == NULL) 2123ef41aaa0SEric Paris return -ENOENT; 212403e1ad7bSPaul Moore 2125ea2dea9dSTimo Teräs if (unlikely(xp->walk.dead)) 21266c5c8ca7SJamal Hadi Salim goto out; 21276c5c8ca7SJamal Hadi Salim 21286c5c8ca7SJamal Hadi Salim err = 0; 21296c5c8ca7SJamal Hadi Salim if (up->hard) { 21306c5c8ca7SJamal Hadi Salim xfrm_policy_delete(xp, p->dir); 21312e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, 1, true); 21326c5c8ca7SJamal Hadi Salim } 2133c6bb8136SEric W. Biederman km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); 21346c5c8ca7SJamal Hadi Salim 21356c5c8ca7SJamal Hadi Salim out: 21366c5c8ca7SJamal Hadi Salim xfrm_pol_put(xp); 21376c5c8ca7SJamal Hadi Salim return err; 21386c5c8ca7SJamal Hadi Salim } 21396c5c8ca7SJamal Hadi Salim 214022e70050SChristoph Hellwig static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 21415424f32eSThomas Graf struct nlattr **attrs) 214253bc6b4dSJamal Hadi Salim { 2143fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 214453bc6b4dSJamal Hadi Salim struct xfrm_state *x; 214553bc6b4dSJamal Hadi Salim int err; 21467b67c857SThomas Graf struct xfrm_user_expire *ue = nlmsg_data(nlh); 214753bc6b4dSJamal Hadi Salim struct xfrm_usersa_info *p = &ue->state; 21486f26b61eSJamal Hadi Salim struct xfrm_mark m; 2149928497f0SNicolas Dichtel u32 mark = xfrm_mark_get(attrs, &m); 215053bc6b4dSJamal Hadi Salim 21516f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); 215253bc6b4dSJamal Hadi Salim 21533a765aa5SDavid S. Miller err = -ENOENT; 215453bc6b4dSJamal Hadi Salim if (x == NULL) 215553bc6b4dSJamal Hadi Salim return err; 215653bc6b4dSJamal Hadi Salim 215753bc6b4dSJamal Hadi Salim spin_lock_bh(&x->lock); 21583a765aa5SDavid S. Miller err = -EINVAL; 215953bc6b4dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 216053bc6b4dSJamal Hadi Salim goto out; 2161c6bb8136SEric W. Biederman km_state_expired(x, ue->hard, nlh->nlmsg_pid); 216253bc6b4dSJamal Hadi Salim 2163161a09e7SJoy Latten if (ue->hard) { 216453bc6b4dSJamal Hadi Salim __xfrm_state_delete(x); 21652e71029eSTetsuo Handa xfrm_audit_state_delete(x, 1, true); 2166161a09e7SJoy Latten } 21673a765aa5SDavid S. Miller err = 0; 216853bc6b4dSJamal Hadi Salim out: 216953bc6b4dSJamal Hadi Salim spin_unlock_bh(&x->lock); 217053bc6b4dSJamal Hadi Salim xfrm_state_put(x); 217153bc6b4dSJamal Hadi Salim return err; 217253bc6b4dSJamal Hadi Salim } 217353bc6b4dSJamal Hadi Salim 217422e70050SChristoph Hellwig static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, 21755424f32eSThomas Graf struct nlattr **attrs) 2176980ebd25SJamal Hadi Salim { 2177fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2178980ebd25SJamal Hadi Salim struct xfrm_policy *xp; 2179980ebd25SJamal Hadi Salim struct xfrm_user_tmpl *ut; 2180980ebd25SJamal Hadi Salim int i; 21815424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 21826f26b61eSJamal Hadi Salim struct xfrm_mark mark; 2183980ebd25SJamal Hadi Salim 21847b67c857SThomas Graf struct xfrm_user_acquire *ua = nlmsg_data(nlh); 2185fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 2186980ebd25SJamal Hadi Salim int err = -ENOMEM; 2187980ebd25SJamal Hadi Salim 2188980ebd25SJamal Hadi Salim if (!x) 2189d8eb9307SIlpo Järvinen goto nomem; 2190980ebd25SJamal Hadi Salim 21916f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &mark); 21926f26b61eSJamal Hadi Salim 2193980ebd25SJamal Hadi Salim err = verify_newpolicy_info(&ua->policy); 2194d8eb9307SIlpo Järvinen if (err) 219573efc324SVegard Nossum goto free_state; 2196980ebd25SJamal Hadi Salim 2197980ebd25SJamal Hadi Salim /* build an XP */ 2198fc34acd3SAlexey Dobriyan xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); 2199d8eb9307SIlpo Järvinen if (!xp) 2200d8eb9307SIlpo Järvinen goto free_state; 2201980ebd25SJamal Hadi Salim 2202980ebd25SJamal Hadi Salim memcpy(&x->id, &ua->id, sizeof(ua->id)); 2203980ebd25SJamal Hadi Salim memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); 2204980ebd25SJamal Hadi Salim memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); 22056f26b61eSJamal Hadi Salim xp->mark.m = x->mark.m = mark.m; 22066f26b61eSJamal Hadi Salim xp->mark.v = x->mark.v = mark.v; 22075424f32eSThomas Graf ut = nla_data(rt); 2208980ebd25SJamal Hadi Salim /* extract the templates and for each call km_key */ 2209980ebd25SJamal Hadi Salim for (i = 0; i < xp->xfrm_nr; i++, ut++) { 2210980ebd25SJamal Hadi Salim struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 2211980ebd25SJamal Hadi Salim memcpy(&x->id, &t->id, sizeof(x->id)); 2212980ebd25SJamal Hadi Salim x->props.mode = t->mode; 2213980ebd25SJamal Hadi Salim x->props.reqid = t->reqid; 2214980ebd25SJamal Hadi Salim x->props.family = ut->family; 2215980ebd25SJamal Hadi Salim t->aalgos = ua->aalgos; 2216980ebd25SJamal Hadi Salim t->ealgos = ua->ealgos; 2217980ebd25SJamal Hadi Salim t->calgos = ua->calgos; 2218980ebd25SJamal Hadi Salim err = km_query(x, t, xp); 2219980ebd25SJamal Hadi Salim 2220980ebd25SJamal Hadi Salim } 2221980ebd25SJamal Hadi Salim 2222980ebd25SJamal Hadi Salim kfree(x); 2223980ebd25SJamal Hadi Salim kfree(xp); 2224980ebd25SJamal Hadi Salim 2225980ebd25SJamal Hadi Salim return 0; 2226d8eb9307SIlpo Järvinen 2227d8eb9307SIlpo Järvinen free_state: 2228d8eb9307SIlpo Järvinen kfree(x); 2229d8eb9307SIlpo Järvinen nomem: 2230d8eb9307SIlpo Järvinen return err; 2231980ebd25SJamal Hadi Salim } 2232980ebd25SJamal Hadi Salim 22335c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 22345c79de6eSShinta Sugimoto static int copy_from_user_migrate(struct xfrm_migrate *ma, 223513c1d189SArnaud Ebalard struct xfrm_kmaddress *k, 22365424f32eSThomas Graf struct nlattr **attrs, int *num) 22375c79de6eSShinta Sugimoto { 22385424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_MIGRATE]; 22395c79de6eSShinta Sugimoto struct xfrm_user_migrate *um; 22405c79de6eSShinta Sugimoto int i, num_migrate; 22415c79de6eSShinta Sugimoto 224213c1d189SArnaud Ebalard if (k != NULL) { 224313c1d189SArnaud Ebalard struct xfrm_user_kmaddress *uk; 224413c1d189SArnaud Ebalard 224513c1d189SArnaud Ebalard uk = nla_data(attrs[XFRMA_KMADDRESS]); 224613c1d189SArnaud Ebalard memcpy(&k->local, &uk->local, sizeof(k->local)); 224713c1d189SArnaud Ebalard memcpy(&k->remote, &uk->remote, sizeof(k->remote)); 224813c1d189SArnaud Ebalard k->family = uk->family; 224913c1d189SArnaud Ebalard k->reserved = uk->reserved; 225013c1d189SArnaud Ebalard } 225113c1d189SArnaud Ebalard 22525424f32eSThomas Graf um = nla_data(rt); 22535424f32eSThomas Graf num_migrate = nla_len(rt) / sizeof(*um); 22545c79de6eSShinta Sugimoto 22555c79de6eSShinta Sugimoto if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) 22565c79de6eSShinta Sugimoto return -EINVAL; 22575c79de6eSShinta Sugimoto 22585c79de6eSShinta Sugimoto for (i = 0; i < num_migrate; i++, um++, ma++) { 22595c79de6eSShinta Sugimoto memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); 22605c79de6eSShinta Sugimoto memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); 22615c79de6eSShinta Sugimoto memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); 22625c79de6eSShinta Sugimoto memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); 22635c79de6eSShinta Sugimoto 22645c79de6eSShinta Sugimoto ma->proto = um->proto; 22655c79de6eSShinta Sugimoto ma->mode = um->mode; 22665c79de6eSShinta Sugimoto ma->reqid = um->reqid; 22675c79de6eSShinta Sugimoto 22685c79de6eSShinta Sugimoto ma->old_family = um->old_family; 22695c79de6eSShinta Sugimoto ma->new_family = um->new_family; 22705c79de6eSShinta Sugimoto } 22715c79de6eSShinta Sugimoto 22725c79de6eSShinta Sugimoto *num = i; 22735c79de6eSShinta Sugimoto return 0; 22745c79de6eSShinta Sugimoto } 22755c79de6eSShinta Sugimoto 22765c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 22775424f32eSThomas Graf struct nlattr **attrs) 22785c79de6eSShinta Sugimoto { 22797b67c857SThomas Graf struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); 22805c79de6eSShinta Sugimoto struct xfrm_migrate m[XFRM_MAX_DEPTH]; 228113c1d189SArnaud Ebalard struct xfrm_kmaddress km, *kmp; 22825c79de6eSShinta Sugimoto u8 type; 22835c79de6eSShinta Sugimoto int err; 22845c79de6eSShinta Sugimoto int n = 0; 22858d549c4fSFan Du struct net *net = sock_net(skb->sk); 22864ab47d47SAntony Antony struct xfrm_encap_tmpl *encap = NULL; 22875c79de6eSShinta Sugimoto 228835a7aa08SThomas Graf if (attrs[XFRMA_MIGRATE] == NULL) 2289cf5cb79fSThomas Graf return -EINVAL; 22905c79de6eSShinta Sugimoto 229113c1d189SArnaud Ebalard kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; 229213c1d189SArnaud Ebalard 22935424f32eSThomas Graf err = copy_from_user_policy_type(&type, attrs); 22945c79de6eSShinta Sugimoto if (err) 22955c79de6eSShinta Sugimoto return err; 22965c79de6eSShinta Sugimoto 229713c1d189SArnaud Ebalard err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); 22985c79de6eSShinta Sugimoto if (err) 22995c79de6eSShinta Sugimoto return err; 23005c79de6eSShinta Sugimoto 23015c79de6eSShinta Sugimoto if (!n) 23025c79de6eSShinta Sugimoto return 0; 23035c79de6eSShinta Sugimoto 23044ab47d47SAntony Antony if (attrs[XFRMA_ENCAP]) { 23054ab47d47SAntony Antony encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 23064ab47d47SAntony Antony sizeof(*encap), GFP_KERNEL); 23074ab47d47SAntony Antony if (!encap) 23085c79de6eSShinta Sugimoto return 0; 23095c79de6eSShinta Sugimoto } 23104ab47d47SAntony Antony 23114ab47d47SAntony Antony err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap); 23124ab47d47SAntony Antony 23134ab47d47SAntony Antony kfree(encap); 23144ab47d47SAntony Antony 23154ab47d47SAntony Antony return err; 23164ab47d47SAntony Antony } 23175c79de6eSShinta Sugimoto #else 23185c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 23195424f32eSThomas Graf struct nlattr **attrs) 23205c79de6eSShinta Sugimoto { 23215c79de6eSShinta Sugimoto return -ENOPROTOOPT; 23225c79de6eSShinta Sugimoto } 23235c79de6eSShinta Sugimoto #endif 23245c79de6eSShinta Sugimoto 23255c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 2326183cad12SDavid S. Miller static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) 23275c79de6eSShinta Sugimoto { 23285c79de6eSShinta Sugimoto struct xfrm_user_migrate um; 23295c79de6eSShinta Sugimoto 23305c79de6eSShinta Sugimoto memset(&um, 0, sizeof(um)); 23315c79de6eSShinta Sugimoto um.proto = m->proto; 23325c79de6eSShinta Sugimoto um.mode = m->mode; 23335c79de6eSShinta Sugimoto um.reqid = m->reqid; 23345c79de6eSShinta Sugimoto um.old_family = m->old_family; 23355c79de6eSShinta Sugimoto memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); 23365c79de6eSShinta Sugimoto memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); 23375c79de6eSShinta Sugimoto um.new_family = m->new_family; 23385c79de6eSShinta Sugimoto memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); 23395c79de6eSShinta Sugimoto memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); 23405c79de6eSShinta Sugimoto 2341c0144beaSThomas Graf return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); 23425c79de6eSShinta Sugimoto } 23435c79de6eSShinta Sugimoto 2344183cad12SDavid S. Miller static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) 234513c1d189SArnaud Ebalard { 234613c1d189SArnaud Ebalard struct xfrm_user_kmaddress uk; 234713c1d189SArnaud Ebalard 234813c1d189SArnaud Ebalard memset(&uk, 0, sizeof(uk)); 234913c1d189SArnaud Ebalard uk.family = k->family; 235013c1d189SArnaud Ebalard uk.reserved = k->reserved; 235113c1d189SArnaud Ebalard memcpy(&uk.local, &k->local, sizeof(uk.local)); 2352a1caa322SArnaud Ebalard memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); 235313c1d189SArnaud Ebalard 235413c1d189SArnaud Ebalard return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); 235513c1d189SArnaud Ebalard } 235613c1d189SArnaud Ebalard 2357a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma, 23588bafd730SAntony Antony int with_encp) 23597deb2264SThomas Graf { 23607deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) 236113c1d189SArnaud Ebalard + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) 23628bafd730SAntony Antony + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0) 23637deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) 23647deb2264SThomas Graf + userpolicy_type_attrsize(); 23657deb2264SThomas Graf } 23667deb2264SThomas Graf 2367183cad12SDavid S. Miller static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, 2368183cad12SDavid S. Miller int num_migrate, const struct xfrm_kmaddress *k, 23698bafd730SAntony Antony const struct xfrm_selector *sel, 23708bafd730SAntony Antony const struct xfrm_encap_tmpl *encap, u8 dir, u8 type) 23715c79de6eSShinta Sugimoto { 2372183cad12SDavid S. Miller const struct xfrm_migrate *mp; 23735c79de6eSShinta Sugimoto struct xfrm_userpolicy_id *pol_id; 23745c79de6eSShinta Sugimoto struct nlmsghdr *nlh; 23751d1e34ddSDavid S. Miller int i, err; 23765c79de6eSShinta Sugimoto 237779b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); 237879b8b7f4SThomas Graf if (nlh == NULL) 237979b8b7f4SThomas Graf return -EMSGSIZE; 23805c79de6eSShinta Sugimoto 23817b67c857SThomas Graf pol_id = nlmsg_data(nlh); 23825c79de6eSShinta Sugimoto /* copy data from selector, dir, and type to the pol_id */ 23835c79de6eSShinta Sugimoto memset(pol_id, 0, sizeof(*pol_id)); 23845c79de6eSShinta Sugimoto memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); 23855c79de6eSShinta Sugimoto pol_id->dir = dir; 23865c79de6eSShinta Sugimoto 23871d1e34ddSDavid S. Miller if (k != NULL) { 23881d1e34ddSDavid S. Miller err = copy_to_user_kmaddress(k, skb); 23891d1e34ddSDavid S. Miller if (err) 23901d1e34ddSDavid S. Miller goto out_cancel; 23911d1e34ddSDavid S. Miller } 23928bafd730SAntony Antony if (encap) { 23938bafd730SAntony Antony err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap); 23948bafd730SAntony Antony if (err) 23958bafd730SAntony Antony goto out_cancel; 23968bafd730SAntony Antony } 23971d1e34ddSDavid S. Miller err = copy_to_user_policy_type(type, skb); 23981d1e34ddSDavid S. Miller if (err) 23991d1e34ddSDavid S. Miller goto out_cancel; 24005c79de6eSShinta Sugimoto for (i = 0, mp = m ; i < num_migrate; i++, mp++) { 24011d1e34ddSDavid S. Miller err = copy_to_user_migrate(mp, skb); 24021d1e34ddSDavid S. Miller if (err) 24031d1e34ddSDavid S. Miller goto out_cancel; 24045c79de6eSShinta Sugimoto } 24055c79de6eSShinta Sugimoto 2406053c095aSJohannes Berg nlmsg_end(skb, nlh); 2407053c095aSJohannes Berg return 0; 24081d1e34ddSDavid S. Miller 24091d1e34ddSDavid S. Miller out_cancel: 24109825069dSThomas Graf nlmsg_cancel(skb, nlh); 24111d1e34ddSDavid S. Miller return err; 24125c79de6eSShinta Sugimoto } 24135c79de6eSShinta Sugimoto 2414183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2415183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 24168bafd730SAntony Antony const struct xfrm_kmaddress *k, 24178bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 24185c79de6eSShinta Sugimoto { 2419a6483b79SAlexey Dobriyan struct net *net = &init_net; 24205c79de6eSShinta Sugimoto struct sk_buff *skb; 24212fc5f83bSGustavo A. R. Silva int err; 24225c79de6eSShinta Sugimoto 24238bafd730SAntony Antony skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap), 24248bafd730SAntony Antony GFP_ATOMIC); 24255c79de6eSShinta Sugimoto if (skb == NULL) 24265c79de6eSShinta Sugimoto return -ENOMEM; 24275c79de6eSShinta Sugimoto 24285c79de6eSShinta Sugimoto /* build migrate */ 24292fc5f83bSGustavo A. R. Silva err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type); 24302fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 24315c79de6eSShinta Sugimoto 243221ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); 24335c79de6eSShinta Sugimoto } 24345c79de6eSShinta Sugimoto #else 2435183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2436183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 24378bafd730SAntony Antony const struct xfrm_kmaddress *k, 24388bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 24395c79de6eSShinta Sugimoto { 24405c79de6eSShinta Sugimoto return -ENOPROTOOPT; 24415c79de6eSShinta Sugimoto } 24425c79de6eSShinta Sugimoto #endif 2443d51d081dSJamal Hadi Salim 2444a7bd9a45SThomas Graf #define XMSGSIZE(type) sizeof(struct type) 2445492b558bSThomas Graf 2446492b558bSThomas Graf static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 244766f9a259SDavid S. Miller [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 2448492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2449492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2450492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 2451492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2452492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2453492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 2454980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 245553bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 2456492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 245766f9a259SDavid S. Miller [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 24586c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 2459492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 2460a7bd9a45SThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, 2461d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 2462d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 246397a64b45SMasahide NAKAMURA [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), 24645c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2465a7bd9a45SThomas Graf [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), 2466880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 2467a7bd9a45SThomas Graf [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 24681da177e4SLinus Torvalds }; 24691da177e4SLinus Torvalds 2470492b558bSThomas Graf #undef XMSGSIZE 2471492b558bSThomas Graf 2472cf5cb79fSThomas Graf static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { 2473c28e9304Sjamal [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, 2474c28e9304Sjamal [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, 2475c28e9304Sjamal [XFRMA_LASTUSED] = { .type = NLA_U64}, 2476c28e9304Sjamal [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, 24771a6509d9SHerbert Xu [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, 2478cf5cb79fSThomas Graf [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, 2479cf5cb79fSThomas Graf [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, 2480cf5cb79fSThomas Graf [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, 2481cf5cb79fSThomas Graf [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, 2482cf5cb79fSThomas Graf [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, 2483cf5cb79fSThomas Graf [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, 2484cf5cb79fSThomas Graf [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, 2485cf5cb79fSThomas Graf [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, 2486cf5cb79fSThomas Graf [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, 2487cf5cb79fSThomas Graf [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, 2488cf5cb79fSThomas Graf [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, 2489cf5cb79fSThomas Graf [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, 2490cf5cb79fSThomas Graf [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, 2491cf5cb79fSThomas Graf [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, 249213c1d189SArnaud Ebalard [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, 24936f26b61eSJamal Hadi Salim [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, 249435d2856bSMartin Willi [XFRMA_TFCPAD] = { .type = NLA_U32 }, 2495d8647b79SSteffen Klassert [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, 2496a947b0a9SNicolas Dichtel [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, 2497d3623099SNicolas Dichtel [XFRMA_PROTO] = { .type = NLA_U8 }, 2498870a2df4SNicolas Dichtel [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, 2499d77e38e6SSteffen Klassert [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) }, 2500e7191358SMichal Kubecek [XFRMA_OUTPUT_MARK] = { .type = NLA_U32 }, 2501cf5cb79fSThomas Graf }; 2502cf5cb79fSThomas Graf 2503880a6fabSChristophe Gouault static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { 2504880a6fabSChristophe Gouault [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 2505880a6fabSChristophe Gouault [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 2506880a6fabSChristophe Gouault }; 2507880a6fabSChristophe Gouault 250805600a79SMathias Krause static const struct xfrm_link { 25095424f32eSThomas Graf int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); 25101137b5e2SHerbert Xu int (*start)(struct netlink_callback *); 25111da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 25124c563f76STimo Teras int (*done)(struct netlink_callback *); 2513880a6fabSChristophe Gouault const struct nla_policy *nla_pol; 2514880a6fabSChristophe Gouault int nla_max; 2515492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 2516492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 2517492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 2518492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 25194c563f76STimo Teras .dump = xfrm_dump_sa, 25204c563f76STimo Teras .done = xfrm_dump_sa_done }, 2521492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 2522492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 2523492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 25241137b5e2SHerbert Xu .start = xfrm_dump_policy_start, 25254c563f76STimo Teras .dump = xfrm_dump_policy, 25264c563f76STimo Teras .done = xfrm_dump_policy_done }, 2527492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 2528980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, 252953bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, 2530492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 2531492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 25326c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, 2533492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 2534492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 2535d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, 2536d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, 25375c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, 253828d8909bSJamal Hadi Salim [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, 2539880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, 2540880a6fabSChristophe Gouault .nla_pol = xfrma_spd_policy, 2541880a6fabSChristophe Gouault .nla_max = XFRMA_SPD_MAX }, 2542ecfd6b18SJamal Hadi Salim [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, 25431da177e4SLinus Torvalds }; 25441da177e4SLinus Torvalds 25452d4bc933SJohannes Berg static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 25462d4bc933SJohannes Berg struct netlink_ext_ack *extack) 25471da177e4SLinus Torvalds { 2548a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 254935a7aa08SThomas Graf struct nlattr *attrs[XFRMA_MAX+1]; 255005600a79SMathias Krause const struct xfrm_link *link; 2551a7bd9a45SThomas Graf int type, err; 25521da177e4SLinus Torvalds 255374005991SFan Du #ifdef CONFIG_COMPAT 25542bf8c476SAndy Lutomirski if (in_compat_syscall()) 255583e2d058SYi Zhao return -EOPNOTSUPP; 255674005991SFan Du #endif 255774005991SFan Du 25581da177e4SLinus Torvalds type = nlh->nlmsg_type; 25591da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 25601d00a4ebSThomas Graf return -EINVAL; 25611da177e4SLinus Torvalds 25621da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 25631da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 25641da177e4SLinus Torvalds 25651da177e4SLinus Torvalds /* All operations require privileges, even GET */ 256690f62cf3SEric W. Biederman if (!netlink_net_capable(skb, CAP_NET_ADMIN)) 25671d00a4ebSThomas Graf return -EPERM; 25681da177e4SLinus Torvalds 2569492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 2570492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 2571b8f3ab42SDavid S. Miller (nlh->nlmsg_flags & NLM_F_DUMP)) { 25721da177e4SLinus Torvalds if (link->dump == NULL) 25731d00a4ebSThomas Graf return -EINVAL; 25741da177e4SLinus Torvalds 257580d326faSPablo Neira Ayuso { 257680d326faSPablo Neira Ayuso struct netlink_dump_control c = { 25771137b5e2SHerbert Xu .start = link->start, 257880d326faSPablo Neira Ayuso .dump = link->dump, 257980d326faSPablo Neira Ayuso .done = link->done, 258080d326faSPablo Neira Ayuso }; 258180d326faSPablo Neira Ayuso return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); 258280d326faSPablo Neira Ayuso } 25831da177e4SLinus Torvalds } 25841da177e4SLinus Torvalds 2585880a6fabSChristophe Gouault err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, 2586880a6fabSChristophe Gouault link->nla_max ? : XFRMA_MAX, 2587fe52145fSJohannes Berg link->nla_pol ? : xfrma_policy, extack); 2588a7bd9a45SThomas Graf if (err < 0) 2589a7bd9a45SThomas Graf return err; 25901da177e4SLinus Torvalds 25911da177e4SLinus Torvalds if (link->doit == NULL) 25921d00a4ebSThomas Graf return -EINVAL; 25931da177e4SLinus Torvalds 25945424f32eSThomas Graf return link->doit(skb, nlh, attrs); 25951da177e4SLinus Torvalds } 25961da177e4SLinus Torvalds 2597cd40b7d3SDenis V. Lunev static void xfrm_netlink_rcv(struct sk_buff *skb) 25981da177e4SLinus Torvalds { 2599283bc9f3SFan Du struct net *net = sock_net(skb->sk); 2600283bc9f3SFan Du 2601283bc9f3SFan Du mutex_lock(&net->xfrm.xfrm_cfg_mutex); 2602cd40b7d3SDenis V. Lunev netlink_rcv_skb(skb, &xfrm_user_rcv_msg); 2603283bc9f3SFan Du mutex_unlock(&net->xfrm.xfrm_cfg_mutex); 26041da177e4SLinus Torvalds } 26051da177e4SLinus Torvalds 2606a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_expire_msgsize(void) 26077deb2264SThomas Graf { 26086f26b61eSJamal Hadi Salim return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) 26096f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)); 26107deb2264SThomas Graf } 26117deb2264SThomas Graf 2612214e005bSDavid S. Miller static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 26131da177e4SLinus Torvalds { 26141da177e4SLinus Torvalds struct xfrm_user_expire *ue; 26151da177e4SLinus Torvalds struct nlmsghdr *nlh; 26161d1e34ddSDavid S. Miller int err; 26171da177e4SLinus Torvalds 261815e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); 261979b8b7f4SThomas Graf if (nlh == NULL) 262079b8b7f4SThomas Graf return -EMSGSIZE; 26211da177e4SLinus Torvalds 26227b67c857SThomas Graf ue = nlmsg_data(nlh); 26231da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 2624d51d081dSJamal Hadi Salim ue->hard = (c->data.hard != 0) ? 1 : 0; 2625e3e5fc16SMathias Krause /* clear the padding bytes */ 2626e3e5fc16SMathias Krause memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard)); 26271da177e4SLinus Torvalds 26281d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 26291d1e34ddSDavid S. Miller if (err) 26301d1e34ddSDavid S. Miller return err; 26316f26b61eSJamal Hadi Salim 2632053c095aSJohannes Berg nlmsg_end(skb, nlh); 2633053c095aSJohannes Berg return 0; 26341da177e4SLinus Torvalds } 26351da177e4SLinus Torvalds 2636214e005bSDavid S. Miller static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) 26371da177e4SLinus Torvalds { 2638fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 26391da177e4SLinus Torvalds struct sk_buff *skb; 26401da177e4SLinus Torvalds 26417deb2264SThomas Graf skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); 26421da177e4SLinus Torvalds if (skb == NULL) 26431da177e4SLinus Torvalds return -ENOMEM; 26441da177e4SLinus Torvalds 26456f26b61eSJamal Hadi Salim if (build_expire(skb, x, c) < 0) { 26466f26b61eSJamal Hadi Salim kfree_skb(skb); 26476f26b61eSJamal Hadi Salim return -EMSGSIZE; 26486f26b61eSJamal Hadi Salim } 26491da177e4SLinus Torvalds 265021ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 26511da177e4SLinus Torvalds } 26521da177e4SLinus Torvalds 2653214e005bSDavid S. Miller static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) 2654d51d081dSJamal Hadi Salim { 2655fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 2656d51d081dSJamal Hadi Salim struct sk_buff *skb; 26572fc5f83bSGustavo A. R. Silva int err; 2658d51d081dSJamal Hadi Salim 2659d8647b79SSteffen Klassert skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 2660d51d081dSJamal Hadi Salim if (skb == NULL) 2661d51d081dSJamal Hadi Salim return -ENOMEM; 2662d51d081dSJamal Hadi Salim 26632fc5f83bSGustavo A. R. Silva err = build_aevent(skb, x, c); 26642fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 2665d51d081dSJamal Hadi Salim 266621ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); 2667d51d081dSJamal Hadi Salim } 2668d51d081dSJamal Hadi Salim 2669214e005bSDavid S. Miller static int xfrm_notify_sa_flush(const struct km_event *c) 267026b15dadSJamal Hadi Salim { 26717067802eSAlexey Dobriyan struct net *net = c->net; 267226b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 267326b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 267426b15dadSJamal Hadi Salim struct sk_buff *skb; 26757deb2264SThomas Graf int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); 267626b15dadSJamal Hadi Salim 26777deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 267826b15dadSJamal Hadi Salim if (skb == NULL) 267926b15dadSJamal Hadi Salim return -ENOMEM; 268026b15dadSJamal Hadi Salim 268115e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); 268279b8b7f4SThomas Graf if (nlh == NULL) { 268379b8b7f4SThomas Graf kfree_skb(skb); 268479b8b7f4SThomas Graf return -EMSGSIZE; 268579b8b7f4SThomas Graf } 268626b15dadSJamal Hadi Salim 26877b67c857SThomas Graf p = nlmsg_data(nlh); 2688bf08867fSHerbert Xu p->proto = c->data.proto; 268926b15dadSJamal Hadi Salim 26909825069dSThomas Graf nlmsg_end(skb, nlh); 269126b15dadSJamal Hadi Salim 269221ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 269326b15dadSJamal Hadi Salim } 269426b15dadSJamal Hadi Salim 2695a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sa_len(struct xfrm_state *x) 269626b15dadSJamal Hadi Salim { 2697a1b831f2SAlexey Dobriyan unsigned int l = 0; 26981a6509d9SHerbert Xu if (x->aead) 26991a6509d9SHerbert Xu l += nla_total_size(aead_len(x->aead)); 27004447bb33SMartin Willi if (x->aalg) { 27014447bb33SMartin Willi l += nla_total_size(sizeof(struct xfrm_algo) + 27024447bb33SMartin Willi (x->aalg->alg_key_len + 7) / 8); 27034447bb33SMartin Willi l += nla_total_size(xfrm_alg_auth_len(x->aalg)); 27044447bb33SMartin Willi } 270526b15dadSJamal Hadi Salim if (x->ealg) 27060f99be0dSEric Dumazet l += nla_total_size(xfrm_alg_len(x->ealg)); 270726b15dadSJamal Hadi Salim if (x->calg) 27087deb2264SThomas Graf l += nla_total_size(sizeof(*x->calg)); 270926b15dadSJamal Hadi Salim if (x->encap) 27107deb2264SThomas Graf l += nla_total_size(sizeof(*x->encap)); 271135d2856bSMartin Willi if (x->tfcpad) 271235d2856bSMartin Willi l += nla_total_size(sizeof(x->tfcpad)); 2713d8647b79SSteffen Klassert if (x->replay_esn) 2714d8647b79SSteffen Klassert l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); 2715f293a5e3Sdingzhi else 2716f293a5e3Sdingzhi l += nla_total_size(sizeof(struct xfrm_replay_state)); 271768325d3bSHerbert Xu if (x->security) 271868325d3bSHerbert Xu l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + 271968325d3bSHerbert Xu x->security->ctx_len); 272068325d3bSHerbert Xu if (x->coaddr) 272168325d3bSHerbert Xu l += nla_total_size(sizeof(*x->coaddr)); 2722a947b0a9SNicolas Dichtel if (x->props.extra_flags) 2723a947b0a9SNicolas Dichtel l += nla_total_size(sizeof(x->props.extra_flags)); 2724d77e38e6SSteffen Klassert if (x->xso.dev) 2725d77e38e6SSteffen Klassert l += nla_total_size(sizeof(x->xso)); 2726077fbac4SLorenzo Colitti if (x->props.output_mark) 2727077fbac4SLorenzo Colitti l += nla_total_size(sizeof(x->props.output_mark)); 272868325d3bSHerbert Xu 2729d26f3984SHerbert Xu /* Must count x->lastused as it may become non-zero behind our back. */ 2730de95c4a4SNicolas Dichtel l += nla_total_size_64bit(sizeof(u64)); 273126b15dadSJamal Hadi Salim 273226b15dadSJamal Hadi Salim return l; 273326b15dadSJamal Hadi Salim } 273426b15dadSJamal Hadi Salim 2735214e005bSDavid S. Miller static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) 273626b15dadSJamal Hadi Salim { 2737fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 273826b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 27390603eac0SHerbert Xu struct xfrm_usersa_id *id; 274026b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 274126b15dadSJamal Hadi Salim struct sk_buff *skb; 2742a1b831f2SAlexey Dobriyan unsigned int len = xfrm_sa_len(x); 2743a1b831f2SAlexey Dobriyan unsigned int headlen; 2744a1b831f2SAlexey Dobriyan int err; 27450603eac0SHerbert Xu 27460603eac0SHerbert Xu headlen = sizeof(*p); 27470603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 27487deb2264SThomas Graf len += nla_total_size(headlen); 27490603eac0SHerbert Xu headlen = sizeof(*id); 27506f26b61eSJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 27510603eac0SHerbert Xu } 27527deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 275326b15dadSJamal Hadi Salim 27547deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 275526b15dadSJamal Hadi Salim if (skb == NULL) 275626b15dadSJamal Hadi Salim return -ENOMEM; 275726b15dadSJamal Hadi Salim 275815e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 27591d1e34ddSDavid S. Miller err = -EMSGSIZE; 276079b8b7f4SThomas Graf if (nlh == NULL) 27611d1e34ddSDavid S. Miller goto out_free_skb; 276226b15dadSJamal Hadi Salim 27637b67c857SThomas Graf p = nlmsg_data(nlh); 27640603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 2765c0144beaSThomas Graf struct nlattr *attr; 2766c0144beaSThomas Graf 27677b67c857SThomas Graf id = nlmsg_data(nlh); 276850329c8aSMathias Krause memset(id, 0, sizeof(*id)); 27690603eac0SHerbert Xu memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); 27700603eac0SHerbert Xu id->spi = x->id.spi; 27710603eac0SHerbert Xu id->family = x->props.family; 27720603eac0SHerbert Xu id->proto = x->id.proto; 27730603eac0SHerbert Xu 2774c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); 27751d1e34ddSDavid S. Miller err = -EMSGSIZE; 2776c0144beaSThomas Graf if (attr == NULL) 27771d1e34ddSDavid S. Miller goto out_free_skb; 2778c0144beaSThomas Graf 2779c0144beaSThomas Graf p = nla_data(attr); 27800603eac0SHerbert Xu } 27811d1e34ddSDavid S. Miller err = copy_to_user_state_extra(x, p, skb); 27821d1e34ddSDavid S. Miller if (err) 27831d1e34ddSDavid S. Miller goto out_free_skb; 278426b15dadSJamal Hadi Salim 27859825069dSThomas Graf nlmsg_end(skb, nlh); 278626b15dadSJamal Hadi Salim 278721ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 278826b15dadSJamal Hadi Salim 27891d1e34ddSDavid S. Miller out_free_skb: 279026b15dadSJamal Hadi Salim kfree_skb(skb); 27911d1e34ddSDavid S. Miller return err; 279226b15dadSJamal Hadi Salim } 279326b15dadSJamal Hadi Salim 2794214e005bSDavid S. Miller static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) 279526b15dadSJamal Hadi Salim { 279626b15dadSJamal Hadi Salim 279726b15dadSJamal Hadi Salim switch (c->event) { 2798f60f6b8fSHerbert Xu case XFRM_MSG_EXPIRE: 279926b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 2800d51d081dSJamal Hadi Salim case XFRM_MSG_NEWAE: 2801d51d081dSJamal Hadi Salim return xfrm_aevent_state_notify(x, c); 2802f60f6b8fSHerbert Xu case XFRM_MSG_DELSA: 2803f60f6b8fSHerbert Xu case XFRM_MSG_UPDSA: 2804f60f6b8fSHerbert Xu case XFRM_MSG_NEWSA: 280526b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 2806f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHSA: 280726b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 280826b15dadSJamal Hadi Salim default: 280962db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", 281062db5cfdSstephen hemminger c->event); 281126b15dadSJamal Hadi Salim break; 281226b15dadSJamal Hadi Salim } 281326b15dadSJamal Hadi Salim 281426b15dadSJamal Hadi Salim return 0; 281526b15dadSJamal Hadi Salim 281626b15dadSJamal Hadi Salim } 281726b15dadSJamal Hadi Salim 2818a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x, 28197deb2264SThomas Graf struct xfrm_policy *xp) 28207deb2264SThomas Graf { 28217deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) 28227deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 28236f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 28247deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(x->security)) 28257deb2264SThomas Graf + userpolicy_type_attrsize(); 28267deb2264SThomas Graf } 28277deb2264SThomas Graf 28281da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 282965e0736bSFan Du struct xfrm_tmpl *xt, struct xfrm_policy *xp) 28301da177e4SLinus Torvalds { 28311d1e34ddSDavid S. Miller __u32 seq = xfrm_get_acqseq(); 28321da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 28331da177e4SLinus Torvalds struct nlmsghdr *nlh; 28341d1e34ddSDavid S. Miller int err; 28351da177e4SLinus Torvalds 283679b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); 283779b8b7f4SThomas Graf if (nlh == NULL) 283879b8b7f4SThomas Graf return -EMSGSIZE; 28391da177e4SLinus Torvalds 28407b67c857SThomas Graf ua = nlmsg_data(nlh); 28411da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 28421da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 28431da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 284465e0736bSFan Du copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); 28451da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 28461da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 28471da177e4SLinus Torvalds ua->calgos = xt->calgos; 28481da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 28491da177e4SLinus Torvalds 28501d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 28511d1e34ddSDavid S. Miller if (!err) 28521d1e34ddSDavid S. Miller err = copy_to_user_state_sec_ctx(x, skb); 28531d1e34ddSDavid S. Miller if (!err) 28541d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 28551d1e34ddSDavid S. Miller if (!err) 28561d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 28571d1e34ddSDavid S. Miller if (err) { 28581d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 28591d1e34ddSDavid S. Miller return err; 28601d1e34ddSDavid S. Miller } 28611da177e4SLinus Torvalds 2862053c095aSJohannes Berg nlmsg_end(skb, nlh); 2863053c095aSJohannes Berg return 0; 28641da177e4SLinus Torvalds } 28651da177e4SLinus Torvalds 28661da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 286765e0736bSFan Du struct xfrm_policy *xp) 28681da177e4SLinus Torvalds { 2869a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 28701da177e4SLinus Torvalds struct sk_buff *skb; 28712fc5f83bSGustavo A. R. Silva int err; 28721da177e4SLinus Torvalds 28737deb2264SThomas Graf skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); 28741da177e4SLinus Torvalds if (skb == NULL) 28751da177e4SLinus Torvalds return -ENOMEM; 28761da177e4SLinus Torvalds 28772fc5f83bSGustavo A. R. Silva err = build_acquire(skb, x, xt, xp); 28782fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 28791da177e4SLinus Torvalds 288021ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); 28811da177e4SLinus Torvalds } 28821da177e4SLinus Torvalds 28831da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 28841da177e4SLinus Torvalds * or more templates. 28851da177e4SLinus Torvalds */ 2886cb969f07SVenkat Yekkirala static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, 28871da177e4SLinus Torvalds u8 *data, int len, int *dir) 28881da177e4SLinus Torvalds { 2889fc34acd3SAlexey Dobriyan struct net *net = sock_net(sk); 28901da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 28911da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 28921da177e4SLinus Torvalds struct xfrm_policy *xp; 28931da177e4SLinus Torvalds int nr; 28941da177e4SLinus Torvalds 2895cb969f07SVenkat Yekkirala switch (sk->sk_family) { 28961da177e4SLinus Torvalds case AF_INET: 28971da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 28981da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 28991da177e4SLinus Torvalds return NULL; 29001da177e4SLinus Torvalds } 29011da177e4SLinus Torvalds break; 2902dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 29031da177e4SLinus Torvalds case AF_INET6: 29041da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 29051da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 29061da177e4SLinus Torvalds return NULL; 29071da177e4SLinus Torvalds } 29081da177e4SLinus Torvalds break; 29091da177e4SLinus Torvalds #endif 29101da177e4SLinus Torvalds default: 29111da177e4SLinus Torvalds *dir = -EINVAL; 29121da177e4SLinus Torvalds return NULL; 29131da177e4SLinus Torvalds } 29141da177e4SLinus Torvalds 29151da177e4SLinus Torvalds *dir = -EINVAL; 29161da177e4SLinus Torvalds 29171da177e4SLinus Torvalds if (len < sizeof(*p) || 29181da177e4SLinus Torvalds verify_newpolicy_info(p)) 29191da177e4SLinus Torvalds return NULL; 29201da177e4SLinus Torvalds 29211da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 2922b4ad86bfSDavid S. Miller if (validate_tmpl(nr, ut, p->sel.family)) 29231da177e4SLinus Torvalds return NULL; 29241da177e4SLinus Torvalds 2925a4f1bac6SHerbert Xu if (p->dir > XFRM_POLICY_OUT) 2926a4f1bac6SHerbert Xu return NULL; 2927a4f1bac6SHerbert Xu 29282f09a4d5SHerbert Xu xp = xfrm_policy_alloc(net, GFP_ATOMIC); 29291da177e4SLinus Torvalds if (xp == NULL) { 29301da177e4SLinus Torvalds *dir = -ENOBUFS; 29311da177e4SLinus Torvalds return NULL; 29321da177e4SLinus Torvalds } 29331da177e4SLinus Torvalds 29341da177e4SLinus Torvalds copy_from_user_policy(xp, p); 2935f7b6983fSMasahide NAKAMURA xp->type = XFRM_POLICY_TYPE_MAIN; 29361da177e4SLinus Torvalds copy_templates(xp, ut, nr); 29371da177e4SLinus Torvalds 29381da177e4SLinus Torvalds *dir = p->dir; 29391da177e4SLinus Torvalds 29401da177e4SLinus Torvalds return xp; 29411da177e4SLinus Torvalds } 29421da177e4SLinus Torvalds 2943a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp) 29447deb2264SThomas Graf { 29457deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) 29467deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 29477deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) 2948295fae56SJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 29497deb2264SThomas Graf + userpolicy_type_attrsize(); 29507deb2264SThomas Graf } 29517deb2264SThomas Graf 29521da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 2953214e005bSDavid S. Miller int dir, const struct km_event *c) 29541da177e4SLinus Torvalds { 29551da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 2956d51d081dSJamal Hadi Salim int hard = c->data.hard; 29571d1e34ddSDavid S. Miller struct nlmsghdr *nlh; 29581d1e34ddSDavid S. Miller int err; 29591da177e4SLinus Torvalds 296015e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); 296179b8b7f4SThomas Graf if (nlh == NULL) 296279b8b7f4SThomas Graf return -EMSGSIZE; 29631da177e4SLinus Torvalds 29647b67c857SThomas Graf upe = nlmsg_data(nlh); 29651da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 29661d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 29671d1e34ddSDavid S. Miller if (!err) 29681d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 29691d1e34ddSDavid S. Miller if (!err) 29701d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 29711d1e34ddSDavid S. Miller if (!err) 29721d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 29731d1e34ddSDavid S. Miller if (err) { 29741d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 29751d1e34ddSDavid S. Miller return err; 29761d1e34ddSDavid S. Miller } 29771da177e4SLinus Torvalds upe->hard = !!hard; 29781da177e4SLinus Torvalds 2979053c095aSJohannes Berg nlmsg_end(skb, nlh); 2980053c095aSJohannes Berg return 0; 29811da177e4SLinus Torvalds } 29821da177e4SLinus Torvalds 2983214e005bSDavid S. Miller static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 29841da177e4SLinus Torvalds { 2985fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 29861da177e4SLinus Torvalds struct sk_buff *skb; 29872fc5f83bSGustavo A. R. Silva int err; 29881da177e4SLinus Torvalds 29897deb2264SThomas Graf skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); 29901da177e4SLinus Torvalds if (skb == NULL) 29911da177e4SLinus Torvalds return -ENOMEM; 29921da177e4SLinus Torvalds 29932fc5f83bSGustavo A. R. Silva err = build_polexpire(skb, xp, dir, c); 29942fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 29951da177e4SLinus Torvalds 299621ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 29971da177e4SLinus Torvalds } 29981da177e4SLinus Torvalds 2999214e005bSDavid S. Miller static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) 300026b15dadSJamal Hadi Salim { 3001a1b831f2SAlexey Dobriyan unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 3002fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 300326b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 30040603eac0SHerbert Xu struct xfrm_userpolicy_id *id; 300526b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 300626b15dadSJamal Hadi Salim struct sk_buff *skb; 3007a1b831f2SAlexey Dobriyan unsigned int headlen; 3008a1b831f2SAlexey Dobriyan int err; 30090603eac0SHerbert Xu 30100603eac0SHerbert Xu headlen = sizeof(*p); 30110603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 30127deb2264SThomas Graf len += nla_total_size(headlen); 30130603eac0SHerbert Xu headlen = sizeof(*id); 30140603eac0SHerbert Xu } 3015cfbfd45aSThomas Graf len += userpolicy_type_attrsize(); 3016295fae56SJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 30177deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 301826b15dadSJamal Hadi Salim 30197deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 302026b15dadSJamal Hadi Salim if (skb == NULL) 302126b15dadSJamal Hadi Salim return -ENOMEM; 302226b15dadSJamal Hadi Salim 302315e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 30241d1e34ddSDavid S. Miller err = -EMSGSIZE; 302579b8b7f4SThomas Graf if (nlh == NULL) 30261d1e34ddSDavid S. Miller goto out_free_skb; 302726b15dadSJamal Hadi Salim 30287b67c857SThomas Graf p = nlmsg_data(nlh); 30290603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 3030c0144beaSThomas Graf struct nlattr *attr; 3031c0144beaSThomas Graf 30327b67c857SThomas Graf id = nlmsg_data(nlh); 30330603eac0SHerbert Xu memset(id, 0, sizeof(*id)); 30340603eac0SHerbert Xu id->dir = dir; 30350603eac0SHerbert Xu if (c->data.byid) 30360603eac0SHerbert Xu id->index = xp->index; 30370603eac0SHerbert Xu else 30380603eac0SHerbert Xu memcpy(&id->sel, &xp->selector, sizeof(id->sel)); 30390603eac0SHerbert Xu 3040c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); 30411d1e34ddSDavid S. Miller err = -EMSGSIZE; 3042c0144beaSThomas Graf if (attr == NULL) 30431d1e34ddSDavid S. Miller goto out_free_skb; 3044c0144beaSThomas Graf 3045c0144beaSThomas Graf p = nla_data(attr); 30460603eac0SHerbert Xu } 304726b15dadSJamal Hadi Salim 304826b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 30491d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 30501d1e34ddSDavid S. Miller if (!err) 30511d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 30521d1e34ddSDavid S. Miller if (!err) 30531d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 30541d1e34ddSDavid S. Miller if (err) 30551d1e34ddSDavid S. Miller goto out_free_skb; 3056295fae56SJamal Hadi Salim 30579825069dSThomas Graf nlmsg_end(skb, nlh); 305826b15dadSJamal Hadi Salim 305921ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 306026b15dadSJamal Hadi Salim 30611d1e34ddSDavid S. Miller out_free_skb: 306226b15dadSJamal Hadi Salim kfree_skb(skb); 30631d1e34ddSDavid S. Miller return err; 306426b15dadSJamal Hadi Salim } 306526b15dadSJamal Hadi Salim 3066214e005bSDavid S. Miller static int xfrm_notify_policy_flush(const struct km_event *c) 306726b15dadSJamal Hadi Salim { 30687067802eSAlexey Dobriyan struct net *net = c->net; 306926b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 307026b15dadSJamal Hadi Salim struct sk_buff *skb; 30711d1e34ddSDavid S. Miller int err; 307226b15dadSJamal Hadi Salim 30737deb2264SThomas Graf skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); 307426b15dadSJamal Hadi Salim if (skb == NULL) 307526b15dadSJamal Hadi Salim return -ENOMEM; 307626b15dadSJamal Hadi Salim 307715e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); 30781d1e34ddSDavid S. Miller err = -EMSGSIZE; 307979b8b7f4SThomas Graf if (nlh == NULL) 30801d1e34ddSDavid S. Miller goto out_free_skb; 30811d1e34ddSDavid S. Miller err = copy_to_user_policy_type(c->data.type, skb); 30821d1e34ddSDavid S. Miller if (err) 30831d1e34ddSDavid S. Miller goto out_free_skb; 308426b15dadSJamal Hadi Salim 30859825069dSThomas Graf nlmsg_end(skb, nlh); 308626b15dadSJamal Hadi Salim 308721ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 308826b15dadSJamal Hadi Salim 30891d1e34ddSDavid S. Miller out_free_skb: 309026b15dadSJamal Hadi Salim kfree_skb(skb); 30911d1e34ddSDavid S. Miller return err; 309226b15dadSJamal Hadi Salim } 309326b15dadSJamal Hadi Salim 3094214e005bSDavid S. Miller static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 309526b15dadSJamal Hadi Salim { 309626b15dadSJamal Hadi Salim 309726b15dadSJamal Hadi Salim switch (c->event) { 3098f60f6b8fSHerbert Xu case XFRM_MSG_NEWPOLICY: 3099f60f6b8fSHerbert Xu case XFRM_MSG_UPDPOLICY: 3100f60f6b8fSHerbert Xu case XFRM_MSG_DELPOLICY: 310126b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 3102f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHPOLICY: 310326b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 3104f60f6b8fSHerbert Xu case XFRM_MSG_POLEXPIRE: 310526b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 310626b15dadSJamal Hadi Salim default: 310762db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", 310862db5cfdSstephen hemminger c->event); 310926b15dadSJamal Hadi Salim } 311026b15dadSJamal Hadi Salim 311126b15dadSJamal Hadi Salim return 0; 311226b15dadSJamal Hadi Salim 311326b15dadSJamal Hadi Salim } 311426b15dadSJamal Hadi Salim 3115a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_report_msgsize(void) 31167deb2264SThomas Graf { 31177deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); 31187deb2264SThomas Graf } 31197deb2264SThomas Graf 312097a64b45SMasahide NAKAMURA static int build_report(struct sk_buff *skb, u8 proto, 312197a64b45SMasahide NAKAMURA struct xfrm_selector *sel, xfrm_address_t *addr) 312297a64b45SMasahide NAKAMURA { 312397a64b45SMasahide NAKAMURA struct xfrm_user_report *ur; 312497a64b45SMasahide NAKAMURA struct nlmsghdr *nlh; 312597a64b45SMasahide NAKAMURA 312679b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); 312779b8b7f4SThomas Graf if (nlh == NULL) 312879b8b7f4SThomas Graf return -EMSGSIZE; 312997a64b45SMasahide NAKAMURA 31307b67c857SThomas Graf ur = nlmsg_data(nlh); 313197a64b45SMasahide NAKAMURA ur->proto = proto; 313297a64b45SMasahide NAKAMURA memcpy(&ur->sel, sel, sizeof(ur->sel)); 313397a64b45SMasahide NAKAMURA 31341d1e34ddSDavid S. Miller if (addr) { 31351d1e34ddSDavid S. Miller int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); 31361d1e34ddSDavid S. Miller if (err) { 31379825069dSThomas Graf nlmsg_cancel(skb, nlh); 31381d1e34ddSDavid S. Miller return err; 31391d1e34ddSDavid S. Miller } 31401d1e34ddSDavid S. Miller } 3141053c095aSJohannes Berg nlmsg_end(skb, nlh); 3142053c095aSJohannes Berg return 0; 314397a64b45SMasahide NAKAMURA } 314497a64b45SMasahide NAKAMURA 3145db983c11SAlexey Dobriyan static int xfrm_send_report(struct net *net, u8 proto, 3146db983c11SAlexey Dobriyan struct xfrm_selector *sel, xfrm_address_t *addr) 314797a64b45SMasahide NAKAMURA { 314897a64b45SMasahide NAKAMURA struct sk_buff *skb; 31492fc5f83bSGustavo A. R. Silva int err; 315097a64b45SMasahide NAKAMURA 31517deb2264SThomas Graf skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); 315297a64b45SMasahide NAKAMURA if (skb == NULL) 315397a64b45SMasahide NAKAMURA return -ENOMEM; 315497a64b45SMasahide NAKAMURA 31552fc5f83bSGustavo A. R. Silva err = build_report(skb, proto, sel, addr); 31562fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 315797a64b45SMasahide NAKAMURA 315821ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); 315997a64b45SMasahide NAKAMURA } 316097a64b45SMasahide NAKAMURA 3161a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_mapping_msgsize(void) 31623a2dfbe8SMartin Willi { 31633a2dfbe8SMartin Willi return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); 31643a2dfbe8SMartin Willi } 31653a2dfbe8SMartin Willi 31663a2dfbe8SMartin Willi static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, 31673a2dfbe8SMartin Willi xfrm_address_t *new_saddr, __be16 new_sport) 31683a2dfbe8SMartin Willi { 31693a2dfbe8SMartin Willi struct xfrm_user_mapping *um; 31703a2dfbe8SMartin Willi struct nlmsghdr *nlh; 31713a2dfbe8SMartin Willi 31723a2dfbe8SMartin Willi nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); 31733a2dfbe8SMartin Willi if (nlh == NULL) 31743a2dfbe8SMartin Willi return -EMSGSIZE; 31753a2dfbe8SMartin Willi 31763a2dfbe8SMartin Willi um = nlmsg_data(nlh); 31773a2dfbe8SMartin Willi 31783a2dfbe8SMartin Willi memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); 31793a2dfbe8SMartin Willi um->id.spi = x->id.spi; 31803a2dfbe8SMartin Willi um->id.family = x->props.family; 31813a2dfbe8SMartin Willi um->id.proto = x->id.proto; 31823a2dfbe8SMartin Willi memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); 31833a2dfbe8SMartin Willi memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); 31843a2dfbe8SMartin Willi um->new_sport = new_sport; 31853a2dfbe8SMartin Willi um->old_sport = x->encap->encap_sport; 31863a2dfbe8SMartin Willi um->reqid = x->props.reqid; 31873a2dfbe8SMartin Willi 3188053c095aSJohannes Berg nlmsg_end(skb, nlh); 3189053c095aSJohannes Berg return 0; 31903a2dfbe8SMartin Willi } 31913a2dfbe8SMartin Willi 31923a2dfbe8SMartin Willi static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, 31933a2dfbe8SMartin Willi __be16 sport) 31943a2dfbe8SMartin Willi { 3195a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 31963a2dfbe8SMartin Willi struct sk_buff *skb; 31972fc5f83bSGustavo A. R. Silva int err; 31983a2dfbe8SMartin Willi 31993a2dfbe8SMartin Willi if (x->id.proto != IPPROTO_ESP) 32003a2dfbe8SMartin Willi return -EINVAL; 32013a2dfbe8SMartin Willi 32023a2dfbe8SMartin Willi if (!x->encap) 32033a2dfbe8SMartin Willi return -EINVAL; 32043a2dfbe8SMartin Willi 32053a2dfbe8SMartin Willi skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); 32063a2dfbe8SMartin Willi if (skb == NULL) 32073a2dfbe8SMartin Willi return -ENOMEM; 32083a2dfbe8SMartin Willi 32092fc5f83bSGustavo A. R. Silva err = build_mapping(skb, x, ipaddr, sport); 32102fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 32113a2dfbe8SMartin Willi 321221ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); 32133a2dfbe8SMartin Willi } 32143a2dfbe8SMartin Willi 32150f24558eSHoria Geanta static bool xfrm_is_alive(const struct km_event *c) 32160f24558eSHoria Geanta { 32170f24558eSHoria Geanta return (bool)xfrm_acquire_is_on(c->net); 32180f24558eSHoria Geanta } 32190f24558eSHoria Geanta 32201da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 32211da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 32221da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 32231da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 32241da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 322597a64b45SMasahide NAKAMURA .report = xfrm_send_report, 32265c79de6eSShinta Sugimoto .migrate = xfrm_send_migrate, 32273a2dfbe8SMartin Willi .new_mapping = xfrm_send_mapping, 32280f24558eSHoria Geanta .is_alive = xfrm_is_alive, 32291da177e4SLinus Torvalds }; 32301da177e4SLinus Torvalds 3231a6483b79SAlexey Dobriyan static int __net_init xfrm_user_net_init(struct net *net) 32321da177e4SLinus Torvalds { 3233be33690dSPatrick McHardy struct sock *nlsk; 3234a31f2d17SPablo Neira Ayuso struct netlink_kernel_cfg cfg = { 3235a31f2d17SPablo Neira Ayuso .groups = XFRMNLGRP_MAX, 3236a31f2d17SPablo Neira Ayuso .input = xfrm_netlink_rcv, 3237a31f2d17SPablo Neira Ayuso }; 3238be33690dSPatrick McHardy 32399f00d977SPablo Neira Ayuso nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); 3240be33690dSPatrick McHardy if (nlsk == NULL) 32411da177e4SLinus Torvalds return -ENOMEM; 3242d79d792eSEric W. Biederman net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ 3243cf778b00SEric Dumazet rcu_assign_pointer(net->xfrm.nlsk, nlsk); 32441da177e4SLinus Torvalds return 0; 32451da177e4SLinus Torvalds } 32461da177e4SLinus Torvalds 3247d79d792eSEric W. Biederman static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) 3248a6483b79SAlexey Dobriyan { 3249d79d792eSEric W. Biederman struct net *net; 3250d79d792eSEric W. Biederman list_for_each_entry(net, net_exit_list, exit_list) 3251a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(net->xfrm.nlsk, NULL); 3252d79d792eSEric W. Biederman synchronize_net(); 3253d79d792eSEric W. Biederman list_for_each_entry(net, net_exit_list, exit_list) 3254d79d792eSEric W. Biederman netlink_kernel_release(net->xfrm.nlsk_stash); 3255a6483b79SAlexey Dobriyan } 3256a6483b79SAlexey Dobriyan 3257a6483b79SAlexey Dobriyan static struct pernet_operations xfrm_user_net_ops = { 3258a6483b79SAlexey Dobriyan .init = xfrm_user_net_init, 3259d79d792eSEric W. Biederman .exit_batch = xfrm_user_net_exit, 3260a6483b79SAlexey Dobriyan }; 3261a6483b79SAlexey Dobriyan 3262a6483b79SAlexey Dobriyan static int __init xfrm_user_init(void) 3263a6483b79SAlexey Dobriyan { 3264a6483b79SAlexey Dobriyan int rv; 3265a6483b79SAlexey Dobriyan 3266a6483b79SAlexey Dobriyan printk(KERN_INFO "Initializing XFRM netlink socket\n"); 3267a6483b79SAlexey Dobriyan 3268a6483b79SAlexey Dobriyan rv = register_pernet_subsys(&xfrm_user_net_ops); 3269a6483b79SAlexey Dobriyan if (rv < 0) 3270a6483b79SAlexey Dobriyan return rv; 3271a6483b79SAlexey Dobriyan rv = xfrm_register_km(&netlink_mgr); 3272a6483b79SAlexey Dobriyan if (rv < 0) 3273a6483b79SAlexey Dobriyan unregister_pernet_subsys(&xfrm_user_net_ops); 3274a6483b79SAlexey Dobriyan return rv; 3275a6483b79SAlexey Dobriyan } 3276a6483b79SAlexey Dobriyan 32771da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 32781da177e4SLinus Torvalds { 32791da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 3280a6483b79SAlexey Dobriyan unregister_pernet_subsys(&xfrm_user_net_ops); 32811da177e4SLinus Torvalds } 32821da177e4SLinus Torvalds 32831da177e4SLinus Torvalds module_init(xfrm_user_init); 32841da177e4SLinus Torvalds module_exit(xfrm_user_exit); 32851da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 32864fdb3bb7SHarald Welte MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); 3287f8cd5488SJamal Hadi Salim 3288