109c434b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds /* xfrm_user.c: User interface to configure xfrm engine. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 2002 David S. Miller (davem@redhat.com) 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Changes: 71da177e4SLinus Torvalds * Mitsuru KANDA @USAGI 81da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI 91da177e4SLinus Torvalds * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 101da177e4SLinus Torvalds * IPv6 support 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 149409f38aSHerbert Xu #include <linux/crypto.h> 151da177e4SLinus Torvalds #include <linux/module.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/types.h> 181da177e4SLinus Torvalds #include <linux/slab.h> 191da177e4SLinus Torvalds #include <linux/socket.h> 201da177e4SLinus Torvalds #include <linux/string.h> 211da177e4SLinus Torvalds #include <linux/net.h> 221da177e4SLinus Torvalds #include <linux/skbuff.h> 231da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 241da177e4SLinus Torvalds #include <linux/ipsec.h> 251da177e4SLinus Torvalds #include <linux/init.h> 261da177e4SLinus Torvalds #include <linux/security.h> 271da177e4SLinus Torvalds #include <net/sock.h> 281da177e4SLinus Torvalds #include <net/xfrm.h> 2988fc2c84SThomas Graf #include <net/netlink.h> 30fa6dd8a2SNicolas Dichtel #include <net/ah.h> 317c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 32dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 33e23c7194SMasahide NAKAMURA #include <linux/in6.h> 34e23c7194SMasahide NAKAMURA #endif 35e33d4f13SSowmini Varadhan #include <asm/unaligned.h> 361da177e4SLinus Torvalds 375424f32eSThomas Graf static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) 381da177e4SLinus Torvalds { 395424f32eSThomas Graf struct nlattr *rt = attrs[type]; 401da177e4SLinus Torvalds struct xfrm_algo *algp; 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds if (!rt) 431da177e4SLinus Torvalds return 0; 441da177e4SLinus Torvalds 455424f32eSThomas Graf algp = nla_data(rt); 4606cd22f8SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_alg_len(algp)) 4731c26852SHerbert Xu return -EINVAL; 4831c26852SHerbert Xu 491da177e4SLinus Torvalds switch (type) { 501da177e4SLinus Torvalds case XFRMA_ALG_AUTH: 511da177e4SLinus Torvalds case XFRMA_ALG_CRYPT: 521da177e4SLinus Torvalds case XFRMA_ALG_COMP: 531da177e4SLinus Torvalds break; 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds default: 561da177e4SLinus Torvalds return -EINVAL; 573ff50b79SStephen Hemminger } 581da177e4SLinus Torvalds 59633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 601da177e4SLinus Torvalds return 0; 611da177e4SLinus Torvalds } 621da177e4SLinus Torvalds 634447bb33SMartin Willi static int verify_auth_trunc(struct nlattr **attrs) 644447bb33SMartin Willi { 654447bb33SMartin Willi struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; 664447bb33SMartin Willi struct xfrm_algo_auth *algp; 674447bb33SMartin Willi 684447bb33SMartin Willi if (!rt) 694447bb33SMartin Willi return 0; 704447bb33SMartin Willi 714447bb33SMartin Willi algp = nla_data(rt); 721bd963a7SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_alg_auth_len(algp)) 734447bb33SMartin Willi return -EINVAL; 744447bb33SMartin Willi 75633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 764447bb33SMartin Willi return 0; 774447bb33SMartin Willi } 784447bb33SMartin Willi 791a6509d9SHerbert Xu static int verify_aead(struct nlattr **attrs) 801a6509d9SHerbert Xu { 811a6509d9SHerbert Xu struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; 821a6509d9SHerbert Xu struct xfrm_algo_aead *algp; 831a6509d9SHerbert Xu 841a6509d9SHerbert Xu if (!rt) 851a6509d9SHerbert Xu return 0; 861a6509d9SHerbert Xu 871a6509d9SHerbert Xu algp = nla_data(rt); 88373b8eebSAlexey Dobriyan if (nla_len(rt) < (int)aead_len(algp)) 891a6509d9SHerbert Xu return -EINVAL; 901a6509d9SHerbert Xu 91633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 921a6509d9SHerbert Xu return 0; 931a6509d9SHerbert Xu } 941a6509d9SHerbert Xu 955424f32eSThomas Graf static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, 96eb2971b6SMasahide NAKAMURA xfrm_address_t **addrp) 97eb2971b6SMasahide NAKAMURA { 985424f32eSThomas Graf struct nlattr *rt = attrs[type]; 99eb2971b6SMasahide NAKAMURA 100cf5cb79fSThomas Graf if (rt && addrp) 1015424f32eSThomas Graf *addrp = nla_data(rt); 102eb2971b6SMasahide NAKAMURA } 103df71837dSTrent Jaeger 1045424f32eSThomas Graf static inline int verify_sec_ctx_len(struct nlattr **attrs) 105df71837dSTrent Jaeger { 1065424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 107df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 108df71837dSTrent Jaeger 109df71837dSTrent Jaeger if (!rt) 110df71837dSTrent Jaeger return 0; 111df71837dSTrent Jaeger 1125424f32eSThomas Graf uctx = nla_data(rt); 113*171d449aSXin Long if (uctx->len > nla_len(rt) || 114*171d449aSXin Long uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) 115df71837dSTrent Jaeger return -EINVAL; 116df71837dSTrent Jaeger 117df71837dSTrent Jaeger return 0; 118df71837dSTrent Jaeger } 119df71837dSTrent Jaeger 120d8647b79SSteffen Klassert static inline int verify_replay(struct xfrm_usersa_info *p, 121d8647b79SSteffen Klassert struct nlattr **attrs) 122d8647b79SSteffen Klassert { 123d8647b79SSteffen Klassert struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; 124ecd79187SMathias Krause struct xfrm_replay_state_esn *rs; 125d8647b79SSteffen Klassert 126ecd79187SMathias Krause if (!rt) 127d97ca5d7SFlorian Westphal return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0; 1287833aa05SSteffen Klassert 129ecd79187SMathias Krause rs = nla_data(rt); 130ecd79187SMathias Krause 131ecd79187SMathias Krause if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) 132ecd79187SMathias Krause return -EINVAL; 133ecd79187SMathias Krause 1345e708e47SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) && 135ecd79187SMathias Krause nla_len(rt) != sizeof(*rs)) 136ecd79187SMathias Krause return -EINVAL; 137d8647b79SSteffen Klassert 13801714109SFan Du /* As only ESP and AH support ESN feature. */ 13901714109SFan Du if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) 14002aadf72SSteffen Klassert return -EINVAL; 14102aadf72SSteffen Klassert 142d8647b79SSteffen Klassert if (p->replay_window != 0) 143d8647b79SSteffen Klassert return -EINVAL; 144d8647b79SSteffen Klassert 145d8647b79SSteffen Klassert return 0; 146d8647b79SSteffen Klassert } 147df71837dSTrent Jaeger 1481da177e4SLinus Torvalds static int verify_newsa_info(struct xfrm_usersa_info *p, 1495424f32eSThomas Graf struct nlattr **attrs) 1501da177e4SLinus Torvalds { 1511da177e4SLinus Torvalds int err; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds err = -EINVAL; 1541da177e4SLinus Torvalds switch (p->family) { 1551da177e4SLinus Torvalds case AF_INET: 156b38ff407SAnirudh Gupta break; 157b38ff407SAnirudh Gupta 158b38ff407SAnirudh Gupta case AF_INET6: 159b38ff407SAnirudh Gupta #if IS_ENABLED(CONFIG_IPV6) 160b38ff407SAnirudh Gupta break; 161b38ff407SAnirudh Gupta #else 162b38ff407SAnirudh Gupta err = -EAFNOSUPPORT; 163b38ff407SAnirudh Gupta goto out; 164b38ff407SAnirudh Gupta #endif 165b38ff407SAnirudh Gupta 166b38ff407SAnirudh Gupta default: 167b38ff407SAnirudh Gupta goto out; 168b38ff407SAnirudh Gupta } 169b38ff407SAnirudh Gupta 170b38ff407SAnirudh Gupta switch (p->sel.family) { 171b8d6d007SNicolas Dichtel case AF_UNSPEC: 172b8d6d007SNicolas Dichtel break; 173b8d6d007SNicolas Dichtel 174b38ff407SAnirudh Gupta case AF_INET: 17507bf7908SSteffen Klassert if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) 17607bf7908SSteffen Klassert goto out; 17707bf7908SSteffen Klassert 1781da177e4SLinus Torvalds break; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds case AF_INET6: 181dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 18207bf7908SSteffen Klassert if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) 18307bf7908SSteffen Klassert goto out; 18407bf7908SSteffen Klassert 1851da177e4SLinus Torvalds break; 1861da177e4SLinus Torvalds #else 1871da177e4SLinus Torvalds err = -EAFNOSUPPORT; 1881da177e4SLinus Torvalds goto out; 1891da177e4SLinus Torvalds #endif 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds default: 1921da177e4SLinus Torvalds goto out; 1933ff50b79SStephen Hemminger } 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds err = -EINVAL; 1961da177e4SLinus Torvalds switch (p->id.proto) { 1971da177e4SLinus Torvalds case IPPROTO_AH: 1984447bb33SMartin Willi if ((!attrs[XFRMA_ALG_AUTH] && 1994447bb33SMartin Willi !attrs[XFRMA_ALG_AUTH_TRUNC]) || 2001a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 20135a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 20235d2856bSMartin Willi attrs[XFRMA_ALG_COMP] || 203a0e5ef53STobias Brunner attrs[XFRMA_TFCPAD]) 2041da177e4SLinus Torvalds goto out; 2051da177e4SLinus Torvalds break; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds case IPPROTO_ESP: 2081a6509d9SHerbert Xu if (attrs[XFRMA_ALG_COMP]) 2091a6509d9SHerbert Xu goto out; 2101a6509d9SHerbert Xu if (!attrs[XFRMA_ALG_AUTH] && 2114447bb33SMartin Willi !attrs[XFRMA_ALG_AUTH_TRUNC] && 2121a6509d9SHerbert Xu !attrs[XFRMA_ALG_CRYPT] && 2131a6509d9SHerbert Xu !attrs[XFRMA_ALG_AEAD]) 2141a6509d9SHerbert Xu goto out; 2151a6509d9SHerbert Xu if ((attrs[XFRMA_ALG_AUTH] || 2164447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 2171a6509d9SHerbert Xu attrs[XFRMA_ALG_CRYPT]) && 2181a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD]) 2191da177e4SLinus Torvalds goto out; 22035d2856bSMartin Willi if (attrs[XFRMA_TFCPAD] && 22135d2856bSMartin Willi p->mode != XFRM_MODE_TUNNEL) 22235d2856bSMartin Willi goto out; 2231da177e4SLinus Torvalds break; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds case IPPROTO_COMP: 22635a7aa08SThomas Graf if (!attrs[XFRMA_ALG_COMP] || 2271a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 22835a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 2294447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 23035d2856bSMartin Willi attrs[XFRMA_ALG_CRYPT] || 231a0e5ef53STobias Brunner attrs[XFRMA_TFCPAD] || 232a0e5ef53STobias Brunner (ntohl(p->id.spi) >= 0x10000)) 2331da177e4SLinus Torvalds goto out; 2341da177e4SLinus Torvalds break; 2351da177e4SLinus Torvalds 236dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 237e23c7194SMasahide NAKAMURA case IPPROTO_DSTOPTS: 238e23c7194SMasahide NAKAMURA case IPPROTO_ROUTING: 23935a7aa08SThomas Graf if (attrs[XFRMA_ALG_COMP] || 24035a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 2414447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 2421a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 24335a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 24435a7aa08SThomas Graf attrs[XFRMA_ENCAP] || 24535a7aa08SThomas Graf attrs[XFRMA_SEC_CTX] || 24635d2856bSMartin Willi attrs[XFRMA_TFCPAD] || 24735a7aa08SThomas Graf !attrs[XFRMA_COADDR]) 248e23c7194SMasahide NAKAMURA goto out; 249e23c7194SMasahide NAKAMURA break; 250e23c7194SMasahide NAKAMURA #endif 251e23c7194SMasahide NAKAMURA 2521da177e4SLinus Torvalds default: 2531da177e4SLinus Torvalds goto out; 2543ff50b79SStephen Hemminger } 2551da177e4SLinus Torvalds 2561a6509d9SHerbert Xu if ((err = verify_aead(attrs))) 2571a6509d9SHerbert Xu goto out; 2584447bb33SMartin Willi if ((err = verify_auth_trunc(attrs))) 2594447bb33SMartin Willi goto out; 26035a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) 2611da177e4SLinus Torvalds goto out; 26235a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) 2631da177e4SLinus Torvalds goto out; 26435a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) 2651da177e4SLinus Torvalds goto out; 26635a7aa08SThomas Graf if ((err = verify_sec_ctx_len(attrs))) 267df71837dSTrent Jaeger goto out; 268d8647b79SSteffen Klassert if ((err = verify_replay(p, attrs))) 269d8647b79SSteffen Klassert goto out; 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds err = -EINVAL; 2721da177e4SLinus Torvalds switch (p->mode) { 2737e49e6deSMasahide NAKAMURA case XFRM_MODE_TRANSPORT: 2747e49e6deSMasahide NAKAMURA case XFRM_MODE_TUNNEL: 275060f02a3SNoriaki TAKAMIYA case XFRM_MODE_ROUTEOPTIMIZATION: 2760a69452cSDiego Beltrami case XFRM_MODE_BEET: 2771da177e4SLinus Torvalds break; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds default: 2801da177e4SLinus Torvalds goto out; 2813ff50b79SStephen Hemminger } 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds err = 0; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds out: 2861da177e4SLinus Torvalds return err; 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, 2906f2f19edSDavid S. Miller struct xfrm_algo_desc *(*get_byname)(const char *, int), 2915424f32eSThomas Graf struct nlattr *rta) 2921da177e4SLinus Torvalds { 2931da177e4SLinus Torvalds struct xfrm_algo *p, *ualg; 2941da177e4SLinus Torvalds struct xfrm_algo_desc *algo; 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds if (!rta) 2971da177e4SLinus Torvalds return 0; 2981da177e4SLinus Torvalds 2995424f32eSThomas Graf ualg = nla_data(rta); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds algo = get_byname(ualg->alg_name, 1); 3021da177e4SLinus Torvalds if (!algo) 3031da177e4SLinus Torvalds return -ENOSYS; 3041da177e4SLinus Torvalds *props = algo->desc.sadb_alg_id; 3051da177e4SLinus Torvalds 3060f99be0dSEric Dumazet p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 3071da177e4SLinus Torvalds if (!p) 3081da177e4SLinus Torvalds return -ENOMEM; 3091da177e4SLinus Torvalds 31004ff1260SHerbert Xu strcpy(p->alg_name, algo->name); 3111da177e4SLinus Torvalds *algpp = p; 3121da177e4SLinus Torvalds return 0; 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 31569b0137fSHerbert Xu static int attach_crypt(struct xfrm_state *x, struct nlattr *rta) 31669b0137fSHerbert Xu { 31769b0137fSHerbert Xu struct xfrm_algo *p, *ualg; 31869b0137fSHerbert Xu struct xfrm_algo_desc *algo; 31969b0137fSHerbert Xu 32069b0137fSHerbert Xu if (!rta) 32169b0137fSHerbert Xu return 0; 32269b0137fSHerbert Xu 32369b0137fSHerbert Xu ualg = nla_data(rta); 32469b0137fSHerbert Xu 32569b0137fSHerbert Xu algo = xfrm_ealg_get_byname(ualg->alg_name, 1); 32669b0137fSHerbert Xu if (!algo) 32769b0137fSHerbert Xu return -ENOSYS; 32869b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 32969b0137fSHerbert Xu 33069b0137fSHerbert Xu p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 33169b0137fSHerbert Xu if (!p) 33269b0137fSHerbert Xu return -ENOMEM; 33369b0137fSHerbert Xu 33469b0137fSHerbert Xu strcpy(p->alg_name, algo->name); 33569b0137fSHerbert Xu x->ealg = p; 33669b0137fSHerbert Xu x->geniv = algo->uinfo.encr.geniv; 33769b0137fSHerbert Xu return 0; 33869b0137fSHerbert Xu } 33969b0137fSHerbert Xu 3404447bb33SMartin Willi static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, 3414447bb33SMartin Willi struct nlattr *rta) 3424447bb33SMartin Willi { 3434447bb33SMartin Willi struct xfrm_algo *ualg; 3444447bb33SMartin Willi struct xfrm_algo_auth *p; 3454447bb33SMartin Willi struct xfrm_algo_desc *algo; 3464447bb33SMartin Willi 3474447bb33SMartin Willi if (!rta) 3484447bb33SMartin Willi return 0; 3494447bb33SMartin Willi 3504447bb33SMartin Willi ualg = nla_data(rta); 3514447bb33SMartin Willi 3524447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 3534447bb33SMartin Willi if (!algo) 3544447bb33SMartin Willi return -ENOSYS; 3554447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 3564447bb33SMartin Willi 3574447bb33SMartin Willi p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); 3584447bb33SMartin Willi if (!p) 3594447bb33SMartin Willi return -ENOMEM; 3604447bb33SMartin Willi 3614447bb33SMartin Willi strcpy(p->alg_name, algo->name); 3624447bb33SMartin Willi p->alg_key_len = ualg->alg_key_len; 3634447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 3644447bb33SMartin Willi memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); 3654447bb33SMartin Willi 3664447bb33SMartin Willi *algpp = p; 3674447bb33SMartin Willi return 0; 3684447bb33SMartin Willi } 3694447bb33SMartin Willi 3704447bb33SMartin Willi static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, 3714447bb33SMartin Willi struct nlattr *rta) 3724447bb33SMartin Willi { 3734447bb33SMartin Willi struct xfrm_algo_auth *p, *ualg; 3744447bb33SMartin Willi struct xfrm_algo_desc *algo; 3754447bb33SMartin Willi 3764447bb33SMartin Willi if (!rta) 3774447bb33SMartin Willi return 0; 3784447bb33SMartin Willi 3794447bb33SMartin Willi ualg = nla_data(rta); 3804447bb33SMartin Willi 3814447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 3824447bb33SMartin Willi if (!algo) 3834447bb33SMartin Willi return -ENOSYS; 384689f1c9dSHerbert Xu if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) 3854447bb33SMartin Willi return -EINVAL; 3864447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 3874447bb33SMartin Willi 3884447bb33SMartin Willi p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); 3894447bb33SMartin Willi if (!p) 3904447bb33SMartin Willi return -ENOMEM; 3914447bb33SMartin Willi 3924447bb33SMartin Willi strcpy(p->alg_name, algo->name); 3934447bb33SMartin Willi if (!p->alg_trunc_len) 3944447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 3954447bb33SMartin Willi 3964447bb33SMartin Willi *algpp = p; 3974447bb33SMartin Willi return 0; 3984447bb33SMartin Willi } 3994447bb33SMartin Willi 40069b0137fSHerbert Xu static int attach_aead(struct xfrm_state *x, struct nlattr *rta) 4011a6509d9SHerbert Xu { 4021a6509d9SHerbert Xu struct xfrm_algo_aead *p, *ualg; 4031a6509d9SHerbert Xu struct xfrm_algo_desc *algo; 4041a6509d9SHerbert Xu 4051a6509d9SHerbert Xu if (!rta) 4061a6509d9SHerbert Xu return 0; 4071a6509d9SHerbert Xu 4081a6509d9SHerbert Xu ualg = nla_data(rta); 4091a6509d9SHerbert Xu 4101a6509d9SHerbert Xu algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); 4111a6509d9SHerbert Xu if (!algo) 4121a6509d9SHerbert Xu return -ENOSYS; 41369b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 4141a6509d9SHerbert Xu 4151a6509d9SHerbert Xu p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); 4161a6509d9SHerbert Xu if (!p) 4171a6509d9SHerbert Xu return -ENOMEM; 4181a6509d9SHerbert Xu 4191a6509d9SHerbert Xu strcpy(p->alg_name, algo->name); 42069b0137fSHerbert Xu x->aead = p; 42169b0137fSHerbert Xu x->geniv = algo->uinfo.aead.geniv; 4221a6509d9SHerbert Xu return 0; 4231a6509d9SHerbert Xu } 4241a6509d9SHerbert Xu 425e2b19125SSteffen Klassert static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, 426e2b19125SSteffen Klassert struct nlattr *rp) 427e2b19125SSteffen Klassert { 428e2b19125SSteffen Klassert struct xfrm_replay_state_esn *up; 4295e708e47SAlexey Dobriyan unsigned int ulen; 430e2b19125SSteffen Klassert 431e2b19125SSteffen Klassert if (!replay_esn || !rp) 432e2b19125SSteffen Klassert return 0; 433e2b19125SSteffen Klassert 434e2b19125SSteffen Klassert up = nla_data(rp); 435ecd79187SMathias Krause ulen = xfrm_replay_state_esn_len(up); 436e2b19125SSteffen Klassert 437f843ee6dSAndy Whitcroft /* Check the overall length and the internal bitmap length to avoid 438f843ee6dSAndy Whitcroft * potential overflow. */ 4395e708e47SAlexey Dobriyan if (nla_len(rp) < (int)ulen || 440f843ee6dSAndy Whitcroft xfrm_replay_state_esn_len(replay_esn) != ulen || 441f843ee6dSAndy Whitcroft replay_esn->bmp_len != up->bmp_len) 442e2b19125SSteffen Klassert return -EINVAL; 443e2b19125SSteffen Klassert 444677e806dSAndy Whitcroft if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) 445677e806dSAndy Whitcroft return -EINVAL; 446677e806dSAndy Whitcroft 447e2b19125SSteffen Klassert return 0; 448e2b19125SSteffen Klassert } 449e2b19125SSteffen Klassert 450d8647b79SSteffen Klassert static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, 451d8647b79SSteffen Klassert struct xfrm_replay_state_esn **preplay_esn, 452d8647b79SSteffen Klassert struct nlattr *rta) 453d8647b79SSteffen Klassert { 454d8647b79SSteffen Klassert struct xfrm_replay_state_esn *p, *pp, *up; 4555e708e47SAlexey Dobriyan unsigned int klen, ulen; 456d8647b79SSteffen Klassert 457d8647b79SSteffen Klassert if (!rta) 458d8647b79SSteffen Klassert return 0; 459d8647b79SSteffen Klassert 460d8647b79SSteffen Klassert up = nla_data(rta); 461ecd79187SMathias Krause klen = xfrm_replay_state_esn_len(up); 4625e708e47SAlexey Dobriyan ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up); 463d8647b79SSteffen Klassert 464ecd79187SMathias Krause p = kzalloc(klen, GFP_KERNEL); 465d8647b79SSteffen Klassert if (!p) 466d8647b79SSteffen Klassert return -ENOMEM; 467d8647b79SSteffen Klassert 468ecd79187SMathias Krause pp = kzalloc(klen, GFP_KERNEL); 469d8647b79SSteffen Klassert if (!pp) { 470d8647b79SSteffen Klassert kfree(p); 471d8647b79SSteffen Klassert return -ENOMEM; 472d8647b79SSteffen Klassert } 473d8647b79SSteffen Klassert 474ecd79187SMathias Krause memcpy(p, up, ulen); 475ecd79187SMathias Krause memcpy(pp, up, ulen); 476ecd79187SMathias Krause 477d8647b79SSteffen Klassert *replay_esn = p; 478d8647b79SSteffen Klassert *preplay_esn = pp; 479d8647b79SSteffen Klassert 480d8647b79SSteffen Klassert return 0; 481d8647b79SSteffen Klassert } 482d8647b79SSteffen Klassert 483a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) 484df71837dSTrent Jaeger { 485a1b831f2SAlexey Dobriyan unsigned int len = 0; 486df71837dSTrent Jaeger 487df71837dSTrent Jaeger if (xfrm_ctx) { 488df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 489df71837dSTrent Jaeger len += xfrm_ctx->ctx_len; 490df71837dSTrent Jaeger } 491df71837dSTrent Jaeger return len; 492df71837dSTrent Jaeger } 493df71837dSTrent Jaeger 4941da177e4SLinus Torvalds static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 4951da177e4SLinus Torvalds { 4961da177e4SLinus Torvalds memcpy(&x->id, &p->id, sizeof(x->id)); 4971da177e4SLinus Torvalds memcpy(&x->sel, &p->sel, sizeof(x->sel)); 4981da177e4SLinus Torvalds memcpy(&x->lft, &p->lft, sizeof(x->lft)); 4991da177e4SLinus Torvalds x->props.mode = p->mode; 50033fce60dSFan Du x->props.replay_window = min_t(unsigned int, p->replay_window, 50133fce60dSFan Du sizeof(x->replay.bitmap) * 8); 5021da177e4SLinus Torvalds x->props.reqid = p->reqid; 5031da177e4SLinus Torvalds x->props.family = p->family; 50454489c14SDavid S. Miller memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); 5051da177e4SLinus Torvalds x->props.flags = p->flags; 506196b0036SHerbert Xu 507ccf9b3b8SSteffen Klassert if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) 508196b0036SHerbert Xu x->sel.family = p->family; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds 511d51d081dSJamal Hadi Salim /* 512d51d081dSJamal Hadi Salim * someday when pfkey also has support, we could have the code 513d51d081dSJamal Hadi Salim * somehow made shareable and move it to xfrm_state.c - JHS 514d51d081dSJamal Hadi Salim * 515d51d081dSJamal Hadi Salim */ 516e3ac104dSMathias Krause static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, 517e3ac104dSMathias Krause int update_esn) 518d51d081dSJamal Hadi Salim { 5195424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 520e3ac104dSMathias Krause struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; 5215424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 5225424f32eSThomas Graf struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 5235424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 524d51d081dSJamal Hadi Salim 525d8647b79SSteffen Klassert if (re) { 526d8647b79SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 527d8647b79SSteffen Klassert replay_esn = nla_data(re); 528d8647b79SSteffen Klassert memcpy(x->replay_esn, replay_esn, 529d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 530d8647b79SSteffen Klassert memcpy(x->preplay_esn, replay_esn, 531d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 532d8647b79SSteffen Klassert } 533d8647b79SSteffen Klassert 534d51d081dSJamal Hadi Salim if (rp) { 535d51d081dSJamal Hadi Salim struct xfrm_replay_state *replay; 5365424f32eSThomas Graf replay = nla_data(rp); 537d51d081dSJamal Hadi Salim memcpy(&x->replay, replay, sizeof(*replay)); 538d51d081dSJamal Hadi Salim memcpy(&x->preplay, replay, sizeof(*replay)); 539d51d081dSJamal Hadi Salim } 540d51d081dSJamal Hadi Salim 541d51d081dSJamal Hadi Salim if (lt) { 542d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur *ltime; 5435424f32eSThomas Graf ltime = nla_data(lt); 544d51d081dSJamal Hadi Salim x->curlft.bytes = ltime->bytes; 545d51d081dSJamal Hadi Salim x->curlft.packets = ltime->packets; 546d51d081dSJamal Hadi Salim x->curlft.add_time = ltime->add_time; 547d51d081dSJamal Hadi Salim x->curlft.use_time = ltime->use_time; 548d51d081dSJamal Hadi Salim } 549d51d081dSJamal Hadi Salim 550cf5cb79fSThomas Graf if (et) 5515424f32eSThomas Graf x->replay_maxage = nla_get_u32(et); 552d51d081dSJamal Hadi Salim 553cf5cb79fSThomas Graf if (rt) 5545424f32eSThomas Graf x->replay_maxdiff = nla_get_u32(rt); 555d51d081dSJamal Hadi Salim } 556d51d081dSJamal Hadi Salim 5579b42c1f1SSteffen Klassert static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m) 5589b42c1f1SSteffen Klassert { 5599b42c1f1SSteffen Klassert if (attrs[XFRMA_SET_MARK]) { 5609b42c1f1SSteffen Klassert m->v = nla_get_u32(attrs[XFRMA_SET_MARK]); 5619b42c1f1SSteffen Klassert if (attrs[XFRMA_SET_MARK_MASK]) 5629b42c1f1SSteffen Klassert m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]); 5639b42c1f1SSteffen Klassert else 5649b42c1f1SSteffen Klassert m->m = 0xffffffff; 5659b42c1f1SSteffen Klassert } else { 5669b42c1f1SSteffen Klassert m->v = m->m = 0; 5679b42c1f1SSteffen Klassert } 5689b42c1f1SSteffen Klassert } 5699b42c1f1SSteffen Klassert 570fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_state_construct(struct net *net, 571fc34acd3SAlexey Dobriyan struct xfrm_usersa_info *p, 5725424f32eSThomas Graf struct nlattr **attrs, 5731da177e4SLinus Torvalds int *errp) 5741da177e4SLinus Torvalds { 575fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 5761da177e4SLinus Torvalds int err = -ENOMEM; 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds if (!x) 5791da177e4SLinus Torvalds goto error_no_put; 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds copy_from_user_state(x, p); 5821da177e4SLinus Torvalds 583a947b0a9SNicolas Dichtel if (attrs[XFRMA_SA_EXTRA_FLAGS]) 584a947b0a9SNicolas Dichtel x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); 585a947b0a9SNicolas Dichtel 58669b0137fSHerbert Xu if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD]))) 5871a6509d9SHerbert Xu goto error; 5884447bb33SMartin Willi if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, 5894447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC]))) 5904447bb33SMartin Willi goto error; 5914447bb33SMartin Willi if (!x->props.aalgo) { 5924447bb33SMartin Willi if ((err = attach_auth(&x->aalg, &x->props.aalgo, 59335a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH]))) 5941da177e4SLinus Torvalds goto error; 5954447bb33SMartin Willi } 59669b0137fSHerbert Xu if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT]))) 5971da177e4SLinus Torvalds goto error; 5981da177e4SLinus Torvalds if ((err = attach_one_algo(&x->calg, &x->props.calgo, 5991da177e4SLinus Torvalds xfrm_calg_get_byname, 60035a7aa08SThomas Graf attrs[XFRMA_ALG_COMP]))) 6011da177e4SLinus Torvalds goto error; 602fd21150aSThomas Graf 603fd21150aSThomas Graf if (attrs[XFRMA_ENCAP]) { 604fd21150aSThomas Graf x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 605fd21150aSThomas Graf sizeof(*x->encap), GFP_KERNEL); 606fd21150aSThomas Graf if (x->encap == NULL) 6071da177e4SLinus Torvalds goto error; 608fd21150aSThomas Graf } 609fd21150aSThomas Graf 61035d2856bSMartin Willi if (attrs[XFRMA_TFCPAD]) 61135d2856bSMartin Willi x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); 61235d2856bSMartin Willi 613fd21150aSThomas Graf if (attrs[XFRMA_COADDR]) { 614fd21150aSThomas Graf x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), 615fd21150aSThomas Graf sizeof(*x->coaddr), GFP_KERNEL); 616fd21150aSThomas Graf if (x->coaddr == NULL) 617060f02a3SNoriaki TAKAMIYA goto error; 618fd21150aSThomas Graf } 619fd21150aSThomas Graf 6206f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &x->mark); 6216f26b61eSJamal Hadi Salim 6229b42c1f1SSteffen Klassert xfrm_smark_init(attrs, &x->props.smark); 623077fbac4SLorenzo Colitti 6247e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 6257e652640SSteffen Klassert x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 6261da177e4SLinus Torvalds 627ffdb5211SIlan Tayari err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]); 6281da177e4SLinus Torvalds if (err) 6291da177e4SLinus Torvalds goto error; 6301da177e4SLinus Torvalds 6312f30ea50SMathias Krause if (attrs[XFRMA_SEC_CTX]) { 6322f30ea50SMathias Krause err = security_xfrm_state_alloc(x, 6332f30ea50SMathias Krause nla_data(attrs[XFRMA_SEC_CTX])); 6342f30ea50SMathias Krause if (err) 635df71837dSTrent Jaeger goto error; 6362f30ea50SMathias Krause } 637df71837dSTrent Jaeger 638d8647b79SSteffen Klassert if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, 639d8647b79SSteffen Klassert attrs[XFRMA_REPLAY_ESN_VAL]))) 640d8647b79SSteffen Klassert goto error; 641d8647b79SSteffen Klassert 6421da177e4SLinus Torvalds x->km.seq = p->seq; 643b27aeadbSAlexey Dobriyan x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; 644d51d081dSJamal Hadi Salim /* sysctl_xfrm_aevent_etime is in 100ms units */ 645b27aeadbSAlexey Dobriyan x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; 646d51d081dSJamal Hadi Salim 6479fdc4883SSteffen Klassert if ((err = xfrm_init_replay(x))) 6489fdc4883SSteffen Klassert goto error; 649d51d081dSJamal Hadi Salim 6509fdc4883SSteffen Klassert /* override default values from above */ 651e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 0); 6521da177e4SLinus Torvalds 653cc01572eSYossi Kuperman /* configure the hardware if offload is requested */ 654cc01572eSYossi Kuperman if (attrs[XFRMA_OFFLOAD_DEV]) { 655cc01572eSYossi Kuperman err = xfrm_dev_state_add(net, x, 656cc01572eSYossi Kuperman nla_data(attrs[XFRMA_OFFLOAD_DEV])); 657cc01572eSYossi Kuperman if (err) 658cc01572eSYossi Kuperman goto error; 659cc01572eSYossi Kuperman } 660cc01572eSYossi Kuperman 6611da177e4SLinus Torvalds return x; 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds error: 6641da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 6651da177e4SLinus Torvalds xfrm_state_put(x); 6661da177e4SLinus Torvalds error_no_put: 6671da177e4SLinus Torvalds *errp = err; 6681da177e4SLinus Torvalds return NULL; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds 67122e70050SChristoph Hellwig static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 6725424f32eSThomas Graf struct nlattr **attrs) 6731da177e4SLinus Torvalds { 674fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 6757b67c857SThomas Graf struct xfrm_usersa_info *p = nlmsg_data(nlh); 6761da177e4SLinus Torvalds struct xfrm_state *x; 6771da177e4SLinus Torvalds int err; 67826b15dadSJamal Hadi Salim struct km_event c; 6791da177e4SLinus Torvalds 68035a7aa08SThomas Graf err = verify_newsa_info(p, attrs); 6811da177e4SLinus Torvalds if (err) 6821da177e4SLinus Torvalds return err; 6831da177e4SLinus Torvalds 684fc34acd3SAlexey Dobriyan x = xfrm_state_construct(net, p, attrs, &err); 6851da177e4SLinus Torvalds if (!x) 6861da177e4SLinus Torvalds return err; 6871da177e4SLinus Torvalds 68826b15dadSJamal Hadi Salim xfrm_state_hold(x); 6891da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 6901da177e4SLinus Torvalds err = xfrm_state_add(x); 6911da177e4SLinus Torvalds else 6921da177e4SLinus Torvalds err = xfrm_state_update(x); 6931da177e4SLinus Torvalds 6942e71029eSTetsuo Handa xfrm_audit_state_add(x, err ? 0 : 1, true); 695161a09e7SJoy Latten 6961da177e4SLinus Torvalds if (err < 0) { 6971da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 698c5d4d7d8SSteffen Klassert xfrm_dev_state_delete(x); 69921380b81SHerbert Xu __xfrm_state_put(x); 7007d6dfe1fSPatrick McHardy goto out; 7011da177e4SLinus Torvalds } 7021da177e4SLinus Torvalds 703cc01572eSYossi Kuperman if (x->km.state == XFRM_STATE_VOID) 704cc01572eSYossi Kuperman x->km.state = XFRM_STATE_VALID; 705cc01572eSYossi Kuperman 70626b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 70715e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 708f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 70926b15dadSJamal Hadi Salim 71026b15dadSJamal Hadi Salim km_state_notify(x, &c); 7117d6dfe1fSPatrick McHardy out: 71226b15dadSJamal Hadi Salim xfrm_state_put(x); 7131da177e4SLinus Torvalds return err; 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds 716fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_user_state_lookup(struct net *net, 717fc34acd3SAlexey Dobriyan struct xfrm_usersa_id *p, 7185424f32eSThomas Graf struct nlattr **attrs, 719eb2971b6SMasahide NAKAMURA int *errp) 720eb2971b6SMasahide NAKAMURA { 721eb2971b6SMasahide NAKAMURA struct xfrm_state *x = NULL; 7226f26b61eSJamal Hadi Salim struct xfrm_mark m; 723eb2971b6SMasahide NAKAMURA int err; 7246f26b61eSJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 725eb2971b6SMasahide NAKAMURA 726eb2971b6SMasahide NAKAMURA if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { 727eb2971b6SMasahide NAKAMURA err = -ESRCH; 7286f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); 729eb2971b6SMasahide NAKAMURA } else { 730eb2971b6SMasahide NAKAMURA xfrm_address_t *saddr = NULL; 731eb2971b6SMasahide NAKAMURA 73235a7aa08SThomas Graf verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); 733eb2971b6SMasahide NAKAMURA if (!saddr) { 734eb2971b6SMasahide NAKAMURA err = -EINVAL; 735eb2971b6SMasahide NAKAMURA goto out; 736eb2971b6SMasahide NAKAMURA } 737eb2971b6SMasahide NAKAMURA 7389abbffeeSMasahide NAKAMURA err = -ESRCH; 7396f26b61eSJamal Hadi Salim x = xfrm_state_lookup_byaddr(net, mark, 7406f26b61eSJamal Hadi Salim &p->daddr, saddr, 741221df1edSAlexey Dobriyan p->proto, p->family); 742eb2971b6SMasahide NAKAMURA } 743eb2971b6SMasahide NAKAMURA 744eb2971b6SMasahide NAKAMURA out: 745eb2971b6SMasahide NAKAMURA if (!x && errp) 746eb2971b6SMasahide NAKAMURA *errp = err; 747eb2971b6SMasahide NAKAMURA return x; 748eb2971b6SMasahide NAKAMURA } 749eb2971b6SMasahide NAKAMURA 75022e70050SChristoph Hellwig static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 7515424f32eSThomas Graf struct nlattr **attrs) 7521da177e4SLinus Torvalds { 753fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 7541da177e4SLinus Torvalds struct xfrm_state *x; 755eb2971b6SMasahide NAKAMURA int err = -ESRCH; 75626b15dadSJamal Hadi Salim struct km_event c; 7577b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 7581da177e4SLinus Torvalds 759fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 7601da177e4SLinus Torvalds if (x == NULL) 761eb2971b6SMasahide NAKAMURA return err; 7621da177e4SLinus Torvalds 7636f68dc37SDavid S. Miller if ((err = security_xfrm_state_delete(x)) != 0) 764c8c05a8eSCatherine Zhang goto out; 765c8c05a8eSCatherine Zhang 7661da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 767c8c05a8eSCatherine Zhang err = -EPERM; 768c8c05a8eSCatherine Zhang goto out; 7691da177e4SLinus Torvalds } 7701da177e4SLinus Torvalds 77126b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 772161a09e7SJoy Latten 773c8c05a8eSCatherine Zhang if (err < 0) 774c8c05a8eSCatherine Zhang goto out; 77526b15dadSJamal Hadi Salim 77626b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 77715e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 778f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 77926b15dadSJamal Hadi Salim km_state_notify(x, &c); 7801da177e4SLinus Torvalds 781c8c05a8eSCatherine Zhang out: 7822e71029eSTetsuo Handa xfrm_audit_state_delete(x, err ? 0 : 1, true); 783c8c05a8eSCatherine Zhang xfrm_state_put(x); 78426b15dadSJamal Hadi Salim return err; 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 7881da177e4SLinus Torvalds { 789f778a636SMathias Krause memset(p, 0, sizeof(*p)); 7901da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 7911da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 7921da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 7931da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 794e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay_window, &p->stats.replay_window); 795e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay, &p->stats.replay); 796e33d4f13SSowmini Varadhan put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed); 79754489c14SDavid S. Miller memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); 7981da177e4SLinus Torvalds p->mode = x->props.mode; 7991da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 8001da177e4SLinus Torvalds p->reqid = x->props.reqid; 8011da177e4SLinus Torvalds p->family = x->props.family; 8021da177e4SLinus Torvalds p->flags = x->props.flags; 8031da177e4SLinus Torvalds p->seq = x->km.seq; 8041da177e4SLinus Torvalds } 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds struct xfrm_dump_info { 8071da177e4SLinus Torvalds struct sk_buff *in_skb; 8081da177e4SLinus Torvalds struct sk_buff *out_skb; 8091da177e4SLinus Torvalds u32 nlmsg_seq; 8101da177e4SLinus Torvalds u16 nlmsg_flags; 8111da177e4SLinus Torvalds }; 8121da177e4SLinus Torvalds 813c0144beaSThomas Graf static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) 814c0144beaSThomas Graf { 815c0144beaSThomas Graf struct xfrm_user_sec_ctx *uctx; 816c0144beaSThomas Graf struct nlattr *attr; 81768325d3bSHerbert Xu int ctx_size = sizeof(*uctx) + s->ctx_len; 818c0144beaSThomas Graf 819c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); 820c0144beaSThomas Graf if (attr == NULL) 821c0144beaSThomas Graf return -EMSGSIZE; 822c0144beaSThomas Graf 823c0144beaSThomas Graf uctx = nla_data(attr); 824c0144beaSThomas Graf uctx->exttype = XFRMA_SEC_CTX; 825c0144beaSThomas Graf uctx->len = ctx_size; 826c0144beaSThomas Graf uctx->ctx_doi = s->ctx_doi; 827c0144beaSThomas Graf uctx->ctx_alg = s->ctx_alg; 828c0144beaSThomas Graf uctx->ctx_len = s->ctx_len; 829c0144beaSThomas Graf memcpy(uctx + 1, s->ctx_str, s->ctx_len); 830c0144beaSThomas Graf 831c0144beaSThomas Graf return 0; 832c0144beaSThomas Graf } 833c0144beaSThomas Graf 834d77e38e6SSteffen Klassert static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb) 835d77e38e6SSteffen Klassert { 836d77e38e6SSteffen Klassert struct xfrm_user_offload *xuo; 837d77e38e6SSteffen Klassert struct nlattr *attr; 838d77e38e6SSteffen Klassert 839d77e38e6SSteffen Klassert attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo)); 840d77e38e6SSteffen Klassert if (attr == NULL) 841d77e38e6SSteffen Klassert return -EMSGSIZE; 842d77e38e6SSteffen Klassert 843d77e38e6SSteffen Klassert xuo = nla_data(attr); 8445fe0d4bdSMathias Krause memset(xuo, 0, sizeof(*xuo)); 845d77e38e6SSteffen Klassert xuo->ifindex = xso->dev->ifindex; 846d77e38e6SSteffen Klassert xuo->flags = xso->flags; 847d77e38e6SSteffen Klassert 848d77e38e6SSteffen Klassert return 0; 849d77e38e6SSteffen Klassert } 850d77e38e6SSteffen Klassert 8514447bb33SMartin Willi static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) 8524447bb33SMartin Willi { 8534447bb33SMartin Willi struct xfrm_algo *algo; 8544447bb33SMartin Willi struct nlattr *nla; 8554447bb33SMartin Willi 8564447bb33SMartin Willi nla = nla_reserve(skb, XFRMA_ALG_AUTH, 8574447bb33SMartin Willi sizeof(*algo) + (auth->alg_key_len + 7) / 8); 8584447bb33SMartin Willi if (!nla) 8594447bb33SMartin Willi return -EMSGSIZE; 8604447bb33SMartin Willi 8614447bb33SMartin Willi algo = nla_data(nla); 8624c87308bSMathias Krause strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); 8634447bb33SMartin Willi memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); 8644447bb33SMartin Willi algo->alg_key_len = auth->alg_key_len; 8654447bb33SMartin Willi 8664447bb33SMartin Willi return 0; 8674447bb33SMartin Willi } 8684447bb33SMartin Willi 8699b42c1f1SSteffen Klassert static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m) 8709b42c1f1SSteffen Klassert { 8719b42c1f1SSteffen Klassert int ret = 0; 8729b42c1f1SSteffen Klassert 8739b42c1f1SSteffen Klassert if (m->v | m->m) { 8749b42c1f1SSteffen Klassert ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v); 8759b42c1f1SSteffen Klassert if (!ret) 8769b42c1f1SSteffen Klassert ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m); 8779b42c1f1SSteffen Klassert } 8789b42c1f1SSteffen Klassert return ret; 8799b42c1f1SSteffen Klassert } 8809b42c1f1SSteffen Klassert 88168325d3bSHerbert Xu /* Don't change this without updating xfrm_sa_len! */ 88268325d3bSHerbert Xu static int copy_to_user_state_extra(struct xfrm_state *x, 88368325d3bSHerbert Xu struct xfrm_usersa_info *p, 88468325d3bSHerbert Xu struct sk_buff *skb) 8851da177e4SLinus Torvalds { 8861d1e34ddSDavid S. Miller int ret = 0; 8871d1e34ddSDavid S. Miller 8881da177e4SLinus Torvalds copy_to_user_state(x, p); 8891da177e4SLinus Torvalds 890a947b0a9SNicolas Dichtel if (x->props.extra_flags) { 891a947b0a9SNicolas Dichtel ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, 892a947b0a9SNicolas Dichtel x->props.extra_flags); 893a947b0a9SNicolas Dichtel if (ret) 894a947b0a9SNicolas Dichtel goto out; 895a947b0a9SNicolas Dichtel } 896a947b0a9SNicolas Dichtel 8971d1e34ddSDavid S. Miller if (x->coaddr) { 8981d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); 8991d1e34ddSDavid S. Miller if (ret) 9001d1e34ddSDavid S. Miller goto out; 9011d1e34ddSDavid S. Miller } 9021d1e34ddSDavid S. Miller if (x->lastused) { 903de95c4a4SNicolas Dichtel ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused, 904de95c4a4SNicolas Dichtel XFRMA_PAD); 9051d1e34ddSDavid S. Miller if (ret) 9061d1e34ddSDavid S. Miller goto out; 9071d1e34ddSDavid S. Miller } 9081d1e34ddSDavid S. Miller if (x->aead) { 9091d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); 9101d1e34ddSDavid S. Miller if (ret) 9111d1e34ddSDavid S. Miller goto out; 9121d1e34ddSDavid S. Miller } 9131d1e34ddSDavid S. Miller if (x->aalg) { 9141d1e34ddSDavid S. Miller ret = copy_to_user_auth(x->aalg, skb); 9151d1e34ddSDavid S. Miller if (!ret) 9161d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, 9171d1e34ddSDavid S. Miller xfrm_alg_auth_len(x->aalg), x->aalg); 9181d1e34ddSDavid S. Miller if (ret) 9191d1e34ddSDavid S. Miller goto out; 9201d1e34ddSDavid S. Miller } 9211d1e34ddSDavid S. Miller if (x->ealg) { 9221d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); 9231d1e34ddSDavid S. Miller if (ret) 9241d1e34ddSDavid S. Miller goto out; 9251d1e34ddSDavid S. Miller } 9261d1e34ddSDavid S. Miller if (x->calg) { 9271d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 9281d1e34ddSDavid S. Miller if (ret) 9291d1e34ddSDavid S. Miller goto out; 9301d1e34ddSDavid S. Miller } 9311d1e34ddSDavid S. Miller if (x->encap) { 9321d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 9331d1e34ddSDavid S. Miller if (ret) 9341d1e34ddSDavid S. Miller goto out; 9351d1e34ddSDavid S. Miller } 9361d1e34ddSDavid S. Miller if (x->tfcpad) { 9371d1e34ddSDavid S. Miller ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); 9381d1e34ddSDavid S. Miller if (ret) 9391d1e34ddSDavid S. Miller goto out; 9401d1e34ddSDavid S. Miller } 9411d1e34ddSDavid S. Miller ret = xfrm_mark_put(skb, &x->mark); 9421d1e34ddSDavid S. Miller if (ret) 9431d1e34ddSDavid S. Miller goto out; 9449b42c1f1SSteffen Klassert 9459b42c1f1SSteffen Klassert ret = xfrm_smark_put(skb, &x->props.smark); 9469b42c1f1SSteffen Klassert if (ret) 9479b42c1f1SSteffen Klassert goto out; 9489b42c1f1SSteffen Klassert 949f293a5e3Sdingzhi if (x->replay_esn) 9501d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 951d0fde795SDavid S. Miller xfrm_replay_state_esn_len(x->replay_esn), 9521d1e34ddSDavid S. Miller x->replay_esn); 953f293a5e3Sdingzhi else 954f293a5e3Sdingzhi ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 955f293a5e3Sdingzhi &x->replay); 9561d1e34ddSDavid S. Miller if (ret) 9571d1e34ddSDavid S. Miller goto out; 958d77e38e6SSteffen Klassert if(x->xso.dev) 959d77e38e6SSteffen Klassert ret = copy_user_offload(&x->xso, skb); 960d77e38e6SSteffen Klassert if (ret) 961d77e38e6SSteffen Klassert goto out; 9627e652640SSteffen Klassert if (x->if_id) { 9637e652640SSteffen Klassert ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id); 964077fbac4SLorenzo Colitti if (ret) 965077fbac4SLorenzo Colitti goto out; 966077fbac4SLorenzo Colitti } 9678598112dSSteffen Klassert if (x->security) 9688598112dSSteffen Klassert ret = copy_sec_ctx(x->security, skb); 9691d1e34ddSDavid S. Miller out: 9701d1e34ddSDavid S. Miller return ret; 97168325d3bSHerbert Xu } 97268325d3bSHerbert Xu 97368325d3bSHerbert Xu static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 97468325d3bSHerbert Xu { 97568325d3bSHerbert Xu struct xfrm_dump_info *sp = ptr; 97668325d3bSHerbert Xu struct sk_buff *in_skb = sp->in_skb; 97768325d3bSHerbert Xu struct sk_buff *skb = sp->out_skb; 97868325d3bSHerbert Xu struct xfrm_usersa_info *p; 97968325d3bSHerbert Xu struct nlmsghdr *nlh; 98068325d3bSHerbert Xu int err; 98168325d3bSHerbert Xu 98215e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 98368325d3bSHerbert Xu XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); 98468325d3bSHerbert Xu if (nlh == NULL) 98568325d3bSHerbert Xu return -EMSGSIZE; 98668325d3bSHerbert Xu 98768325d3bSHerbert Xu p = nlmsg_data(nlh); 98868325d3bSHerbert Xu 98968325d3bSHerbert Xu err = copy_to_user_state_extra(x, p, skb); 9901d1e34ddSDavid S. Miller if (err) { 9919825069dSThomas Graf nlmsg_cancel(skb, nlh); 99268325d3bSHerbert Xu return err; 9931da177e4SLinus Torvalds } 9941d1e34ddSDavid S. Miller nlmsg_end(skb, nlh); 9951d1e34ddSDavid S. Miller return 0; 9961d1e34ddSDavid S. Miller } 9971da177e4SLinus Torvalds 9984c563f76STimo Teras static int xfrm_dump_sa_done(struct netlink_callback *cb) 9994c563f76STimo Teras { 10004c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 1001283bc9f3SFan Du struct sock *sk = cb->skb->sk; 1002283bc9f3SFan Du struct net *net = sock_net(sk); 1003283bc9f3SFan Du 10041ba5bf99SVegard Nossum if (cb->args[0]) 1005283bc9f3SFan Du xfrm_state_walk_done(walk, net); 10064c563f76STimo Teras return 0; 10074c563f76STimo Teras } 10084c563f76STimo Teras 1009d3623099SNicolas Dichtel static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; 10101da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 10111da177e4SLinus Torvalds { 1012fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 10134c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 10141da177e4SLinus Torvalds struct xfrm_dump_info info; 10151da177e4SLinus Torvalds 10164c563f76STimo Teras BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > 10174c563f76STimo Teras sizeof(cb->args) - sizeof(cb->args[0])); 10184c563f76STimo Teras 10191da177e4SLinus Torvalds info.in_skb = cb->skb; 10201da177e4SLinus Torvalds info.out_skb = skb; 10211da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 10221da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 10234c563f76STimo Teras 10244c563f76STimo Teras if (!cb->args[0]) { 1025d3623099SNicolas Dichtel struct nlattr *attrs[XFRMA_MAX+1]; 1026870a2df4SNicolas Dichtel struct xfrm_address_filter *filter = NULL; 1027d3623099SNicolas Dichtel u8 proto = 0; 1028d3623099SNicolas Dichtel int err; 1029d3623099SNicolas Dichtel 10308cb08174SJohannes Berg err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX, 10318cb08174SJohannes Berg xfrma_policy, cb->extack); 1032d3623099SNicolas Dichtel if (err < 0) 1033d3623099SNicolas Dichtel return err; 1034d3623099SNicolas Dichtel 1035870a2df4SNicolas Dichtel if (attrs[XFRMA_ADDRESS_FILTER]) { 1036df367561SAndrzej Hajda filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), 1037df367561SAndrzej Hajda sizeof(*filter), GFP_KERNEL); 1038d3623099SNicolas Dichtel if (filter == NULL) 1039d3623099SNicolas Dichtel return -ENOMEM; 1040d3623099SNicolas Dichtel } 1041d3623099SNicolas Dichtel 1042d3623099SNicolas Dichtel if (attrs[XFRMA_PROTO]) 1043d3623099SNicolas Dichtel proto = nla_get_u8(attrs[XFRMA_PROTO]); 1044d3623099SNicolas Dichtel 1045d3623099SNicolas Dichtel xfrm_state_walk_init(walk, proto, filter); 10461ba5bf99SVegard Nossum cb->args[0] = 1; 10474c563f76STimo Teras } 10484c563f76STimo Teras 1049fc34acd3SAlexey Dobriyan (void) xfrm_state_walk(net, walk, dump_one_state, &info); 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds return skb->len; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 10551da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 10561da177e4SLinus Torvalds { 10571da177e4SLinus Torvalds struct xfrm_dump_info info; 10581da177e4SLinus Torvalds struct sk_buff *skb; 1059864745d2SMathias Krause int err; 10601da177e4SLinus Torvalds 10617deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 10621da177e4SLinus Torvalds if (!skb) 10631da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds info.in_skb = in_skb; 10661da177e4SLinus Torvalds info.out_skb = skb; 10671da177e4SLinus Torvalds info.nlmsg_seq = seq; 10681da177e4SLinus Torvalds info.nlmsg_flags = 0; 10691da177e4SLinus Torvalds 1070864745d2SMathias Krause err = dump_one_state(x, 0, &info); 1071864745d2SMathias Krause if (err) { 10721da177e4SLinus Torvalds kfree_skb(skb); 1073864745d2SMathias Krause return ERR_PTR(err); 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds return skb; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 107921ee543eSMichal Kubecek /* A wrapper for nlmsg_multicast() checking that nlsk is still available. 108021ee543eSMichal Kubecek * Must be called with RCU read lock. 108121ee543eSMichal Kubecek */ 108221ee543eSMichal Kubecek static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, 108321ee543eSMichal Kubecek u32 pid, unsigned int group) 108421ee543eSMichal Kubecek { 108521ee543eSMichal Kubecek struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); 108621ee543eSMichal Kubecek 108786126b77SFlorian Westphal if (!nlsk) { 108886126b77SFlorian Westphal kfree_skb(skb); 108986126b77SFlorian Westphal return -EPIPE; 109086126b77SFlorian Westphal } 109186126b77SFlorian Westphal 109221ee543eSMichal Kubecek return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); 109321ee543eSMichal Kubecek } 109421ee543eSMichal Kubecek 1095a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_spdinfo_msgsize(void) 10967deb2264SThomas Graf { 10977deb2264SThomas Graf return NLMSG_ALIGN(4) 10987deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_spdinfo)) 1099880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhinfo)) 1100880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)) 1101880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)); 11027deb2264SThomas Graf } 11037deb2264SThomas Graf 1104e071041bSAlexey Dobriyan static int build_spdinfo(struct sk_buff *skb, struct net *net, 110515e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 1106ecfd6b18SJamal Hadi Salim { 11075a6d3416SJamal Hadi Salim struct xfrmk_spdinfo si; 11085a6d3416SJamal Hadi Salim struct xfrmu_spdinfo spc; 11095a6d3416SJamal Hadi Salim struct xfrmu_spdhinfo sph; 1110880a6fabSChristophe Gouault struct xfrmu_spdhthresh spt4, spt6; 1111ecfd6b18SJamal Hadi Salim struct nlmsghdr *nlh; 11121d1e34ddSDavid S. Miller int err; 1113ecfd6b18SJamal Hadi Salim u32 *f; 1114880a6fabSChristophe Gouault unsigned lseq; 1115ecfd6b18SJamal Hadi Salim 111615e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); 111725985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 1118ecfd6b18SJamal Hadi Salim return -EMSGSIZE; 1119ecfd6b18SJamal Hadi Salim 1120ecfd6b18SJamal Hadi Salim f = nlmsg_data(nlh); 1121ecfd6b18SJamal Hadi Salim *f = flags; 1122e071041bSAlexey Dobriyan xfrm_spd_getinfo(net, &si); 11235a6d3416SJamal Hadi Salim spc.incnt = si.incnt; 11245a6d3416SJamal Hadi Salim spc.outcnt = si.outcnt; 11255a6d3416SJamal Hadi Salim spc.fwdcnt = si.fwdcnt; 11265a6d3416SJamal Hadi Salim spc.inscnt = si.inscnt; 11275a6d3416SJamal Hadi Salim spc.outscnt = si.outscnt; 11285a6d3416SJamal Hadi Salim spc.fwdscnt = si.fwdscnt; 11295a6d3416SJamal Hadi Salim sph.spdhcnt = si.spdhcnt; 11305a6d3416SJamal Hadi Salim sph.spdhmcnt = si.spdhmcnt; 1131ecfd6b18SJamal Hadi Salim 1132880a6fabSChristophe Gouault do { 1133880a6fabSChristophe Gouault lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); 1134880a6fabSChristophe Gouault 1135880a6fabSChristophe Gouault spt4.lbits = net->xfrm.policy_hthresh.lbits4; 1136880a6fabSChristophe Gouault spt4.rbits = net->xfrm.policy_hthresh.rbits4; 1137880a6fabSChristophe Gouault spt6.lbits = net->xfrm.policy_hthresh.lbits6; 1138880a6fabSChristophe Gouault spt6.rbits = net->xfrm.policy_hthresh.rbits6; 1139880a6fabSChristophe Gouault } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); 1140880a6fabSChristophe Gouault 11411d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); 11421d1e34ddSDavid S. Miller if (!err) 11431d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); 1144880a6fabSChristophe Gouault if (!err) 1145880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); 1146880a6fabSChristophe Gouault if (!err) 1147880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); 11481d1e34ddSDavid S. Miller if (err) { 11491d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 11501d1e34ddSDavid S. Miller return err; 11511d1e34ddSDavid S. Miller } 1152ecfd6b18SJamal Hadi Salim 1153053c095aSJohannes Berg nlmsg_end(skb, nlh); 1154053c095aSJohannes Berg return 0; 1155ecfd6b18SJamal Hadi Salim } 1156ecfd6b18SJamal Hadi Salim 1157880a6fabSChristophe Gouault static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 1158880a6fabSChristophe Gouault struct nlattr **attrs) 1159880a6fabSChristophe Gouault { 1160880a6fabSChristophe Gouault struct net *net = sock_net(skb->sk); 1161880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh4 = NULL; 1162880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh6 = NULL; 1163880a6fabSChristophe Gouault 1164880a6fabSChristophe Gouault /* selector prefixlen thresholds to hash policies */ 1165880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { 1166880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; 1167880a6fabSChristophe Gouault 1168880a6fabSChristophe Gouault if (nla_len(rta) < sizeof(*thresh4)) 1169880a6fabSChristophe Gouault return -EINVAL; 1170880a6fabSChristophe Gouault thresh4 = nla_data(rta); 1171880a6fabSChristophe Gouault if (thresh4->lbits > 32 || thresh4->rbits > 32) 1172880a6fabSChristophe Gouault return -EINVAL; 1173880a6fabSChristophe Gouault } 1174880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { 1175880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; 1176880a6fabSChristophe Gouault 1177880a6fabSChristophe Gouault if (nla_len(rta) < sizeof(*thresh6)) 1178880a6fabSChristophe Gouault return -EINVAL; 1179880a6fabSChristophe Gouault thresh6 = nla_data(rta); 1180880a6fabSChristophe Gouault if (thresh6->lbits > 128 || thresh6->rbits > 128) 1181880a6fabSChristophe Gouault return -EINVAL; 1182880a6fabSChristophe Gouault } 1183880a6fabSChristophe Gouault 1184880a6fabSChristophe Gouault if (thresh4 || thresh6) { 1185880a6fabSChristophe Gouault write_seqlock(&net->xfrm.policy_hthresh.lock); 1186880a6fabSChristophe Gouault if (thresh4) { 1187880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; 1188880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; 1189880a6fabSChristophe Gouault } 1190880a6fabSChristophe Gouault if (thresh6) { 1191880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; 1192880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; 1193880a6fabSChristophe Gouault } 1194880a6fabSChristophe Gouault write_sequnlock(&net->xfrm.policy_hthresh.lock); 1195880a6fabSChristophe Gouault 1196880a6fabSChristophe Gouault xfrm_policy_hash_rebuild(net); 1197880a6fabSChristophe Gouault } 1198880a6fabSChristophe Gouault 1199880a6fabSChristophe Gouault return 0; 1200880a6fabSChristophe Gouault } 1201880a6fabSChristophe Gouault 1202ecfd6b18SJamal Hadi Salim static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 12035424f32eSThomas Graf struct nlattr **attrs) 1204ecfd6b18SJamal Hadi Salim { 1205a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 1206ecfd6b18SJamal Hadi Salim struct sk_buff *r_skb; 12077b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 120815e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 1209ecfd6b18SJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 12102fc5f83bSGustavo A. R. Silva int err; 1211ecfd6b18SJamal Hadi Salim 12127deb2264SThomas Graf r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); 1213ecfd6b18SJamal Hadi Salim if (r_skb == NULL) 1214ecfd6b18SJamal Hadi Salim return -ENOMEM; 1215ecfd6b18SJamal Hadi Salim 12162fc5f83bSGustavo A. R. Silva err = build_spdinfo(r_skb, net, sportid, seq, *flags); 12172fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 1218ecfd6b18SJamal Hadi Salim 121915e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 1220ecfd6b18SJamal Hadi Salim } 1221ecfd6b18SJamal Hadi Salim 1222a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sadinfo_msgsize(void) 12237deb2264SThomas Graf { 12247deb2264SThomas Graf return NLMSG_ALIGN(4) 12257deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_sadhinfo)) 12267deb2264SThomas Graf + nla_total_size(4); /* XFRMA_SAD_CNT */ 12277deb2264SThomas Graf } 12287deb2264SThomas Graf 1229e071041bSAlexey Dobriyan static int build_sadinfo(struct sk_buff *skb, struct net *net, 123015e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 123128d8909bSJamal Hadi Salim { 1232af11e316SJamal Hadi Salim struct xfrmk_sadinfo si; 1233af11e316SJamal Hadi Salim struct xfrmu_sadhinfo sh; 123428d8909bSJamal Hadi Salim struct nlmsghdr *nlh; 12351d1e34ddSDavid S. Miller int err; 123628d8909bSJamal Hadi Salim u32 *f; 123728d8909bSJamal Hadi Salim 123815e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); 123925985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 124028d8909bSJamal Hadi Salim return -EMSGSIZE; 124128d8909bSJamal Hadi Salim 124228d8909bSJamal Hadi Salim f = nlmsg_data(nlh); 124328d8909bSJamal Hadi Salim *f = flags; 1244e071041bSAlexey Dobriyan xfrm_sad_getinfo(net, &si); 124528d8909bSJamal Hadi Salim 1246af11e316SJamal Hadi Salim sh.sadhmcnt = si.sadhmcnt; 1247af11e316SJamal Hadi Salim sh.sadhcnt = si.sadhcnt; 1248af11e316SJamal Hadi Salim 12491d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); 12501d1e34ddSDavid S. Miller if (!err) 12511d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); 12521d1e34ddSDavid S. Miller if (err) { 12531d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 12541d1e34ddSDavid S. Miller return err; 12551d1e34ddSDavid S. Miller } 125628d8909bSJamal Hadi Salim 1257053c095aSJohannes Berg nlmsg_end(skb, nlh); 1258053c095aSJohannes Berg return 0; 125928d8909bSJamal Hadi Salim } 126028d8909bSJamal Hadi Salim 126128d8909bSJamal Hadi Salim static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 12625424f32eSThomas Graf struct nlattr **attrs) 126328d8909bSJamal Hadi Salim { 1264a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 126528d8909bSJamal Hadi Salim struct sk_buff *r_skb; 12667b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 126715e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 126828d8909bSJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 12692fc5f83bSGustavo A. R. Silva int err; 127028d8909bSJamal Hadi Salim 12717deb2264SThomas Graf r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); 127228d8909bSJamal Hadi Salim if (r_skb == NULL) 127328d8909bSJamal Hadi Salim return -ENOMEM; 127428d8909bSJamal Hadi Salim 12752fc5f83bSGustavo A. R. Silva err = build_sadinfo(r_skb, net, sportid, seq, *flags); 12762fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 127728d8909bSJamal Hadi Salim 127815e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 127928d8909bSJamal Hadi Salim } 128028d8909bSJamal Hadi Salim 128122e70050SChristoph Hellwig static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 12825424f32eSThomas Graf struct nlattr **attrs) 12831da177e4SLinus Torvalds { 1284fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 12857b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 12861da177e4SLinus Torvalds struct xfrm_state *x; 12871da177e4SLinus Torvalds struct sk_buff *resp_skb; 1288eb2971b6SMasahide NAKAMURA int err = -ESRCH; 12891da177e4SLinus Torvalds 1290fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 12911da177e4SLinus Torvalds if (x == NULL) 12921da177e4SLinus Torvalds goto out_noput; 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 12951da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 12961da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 12971da177e4SLinus Torvalds } else { 129815e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds xfrm_state_put(x); 13011da177e4SLinus Torvalds out_noput: 13021da177e4SLinus Torvalds return err; 13031da177e4SLinus Torvalds } 13041da177e4SLinus Torvalds 130522e70050SChristoph Hellwig static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, 13065424f32eSThomas Graf struct nlattr **attrs) 13071da177e4SLinus Torvalds { 1308fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 13091da177e4SLinus Torvalds struct xfrm_state *x; 13101da177e4SLinus Torvalds struct xfrm_userspi_info *p; 13111da177e4SLinus Torvalds struct sk_buff *resp_skb; 13121da177e4SLinus Torvalds xfrm_address_t *daddr; 13131da177e4SLinus Torvalds int family; 13141da177e4SLinus Torvalds int err; 13156f26b61eSJamal Hadi Salim u32 mark; 13166f26b61eSJamal Hadi Salim struct xfrm_mark m; 13177e652640SSteffen Klassert u32 if_id = 0; 13181da177e4SLinus Torvalds 13197b67c857SThomas Graf p = nlmsg_data(nlh); 1320776e9dd9SFan Du err = verify_spi_info(p->info.id.proto, p->min, p->max); 13211da177e4SLinus Torvalds if (err) 13221da177e4SLinus Torvalds goto out_noput; 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds family = p->info.family; 13251da177e4SLinus Torvalds daddr = &p->info.id.daddr; 13261da177e4SLinus Torvalds 13271da177e4SLinus Torvalds x = NULL; 13286f26b61eSJamal Hadi Salim 13296f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 13307e652640SSteffen Klassert 13317e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 13327e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 13337e652640SSteffen Klassert 13341da177e4SLinus Torvalds if (p->info.seq) { 13356f26b61eSJamal Hadi Salim x = xfrm_find_acq_byseq(net, mark, p->info.seq); 133670e94e66SYOSHIFUJI Hideaki / 吉藤英明 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { 13371da177e4SLinus Torvalds xfrm_state_put(x); 13381da177e4SLinus Torvalds x = NULL; 13391da177e4SLinus Torvalds } 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds if (!x) 13436f26b61eSJamal Hadi Salim x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, 13447e652640SSteffen Klassert if_id, p->info.id.proto, daddr, 13451da177e4SLinus Torvalds &p->info.saddr, 1, 13461da177e4SLinus Torvalds family); 13471da177e4SLinus Torvalds err = -ENOENT; 13481da177e4SLinus Torvalds if (x == NULL) 13491da177e4SLinus Torvalds goto out_noput; 13501da177e4SLinus Torvalds 1351658b219eSHerbert Xu err = xfrm_alloc_spi(x, p->min, p->max); 1352658b219eSHerbert Xu if (err) 1353658b219eSHerbert Xu goto out; 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 13561da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 13571da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 13581da177e4SLinus Torvalds goto out; 13591da177e4SLinus Torvalds } 13601da177e4SLinus Torvalds 136115e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds out: 13641da177e4SLinus Torvalds xfrm_state_put(x); 13651da177e4SLinus Torvalds out_noput: 13661da177e4SLinus Torvalds return err; 13671da177e4SLinus Torvalds } 13681da177e4SLinus Torvalds 1369b798a9edSJamal Hadi Salim static int verify_policy_dir(u8 dir) 13701da177e4SLinus Torvalds { 13711da177e4SLinus Torvalds switch (dir) { 13721da177e4SLinus Torvalds case XFRM_POLICY_IN: 13731da177e4SLinus Torvalds case XFRM_POLICY_OUT: 13741da177e4SLinus Torvalds case XFRM_POLICY_FWD: 13751da177e4SLinus Torvalds break; 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds default: 13781da177e4SLinus Torvalds return -EINVAL; 13793ff50b79SStephen Hemminger } 13801da177e4SLinus Torvalds 13811da177e4SLinus Torvalds return 0; 13821da177e4SLinus Torvalds } 13831da177e4SLinus Torvalds 1384b798a9edSJamal Hadi Salim static int verify_policy_type(u8 type) 1385f7b6983fSMasahide NAKAMURA { 1386f7b6983fSMasahide NAKAMURA switch (type) { 1387f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_MAIN: 1388f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1389f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_SUB: 1390f7b6983fSMasahide NAKAMURA #endif 1391f7b6983fSMasahide NAKAMURA break; 1392f7b6983fSMasahide NAKAMURA 1393f7b6983fSMasahide NAKAMURA default: 1394f7b6983fSMasahide NAKAMURA return -EINVAL; 13953ff50b79SStephen Hemminger } 1396f7b6983fSMasahide NAKAMURA 1397f7b6983fSMasahide NAKAMURA return 0; 1398f7b6983fSMasahide NAKAMURA } 1399f7b6983fSMasahide NAKAMURA 14001da177e4SLinus Torvalds static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) 14011da177e4SLinus Torvalds { 1402e682adf0SFan Du int ret; 1403e682adf0SFan Du 14041da177e4SLinus Torvalds switch (p->share) { 14051da177e4SLinus Torvalds case XFRM_SHARE_ANY: 14061da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 14071da177e4SLinus Torvalds case XFRM_SHARE_USER: 14081da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 14091da177e4SLinus Torvalds break; 14101da177e4SLinus Torvalds 14111da177e4SLinus Torvalds default: 14121da177e4SLinus Torvalds return -EINVAL; 14133ff50b79SStephen Hemminger } 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds switch (p->action) { 14161da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 14171da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 14181da177e4SLinus Torvalds break; 14191da177e4SLinus Torvalds 14201da177e4SLinus Torvalds default: 14211da177e4SLinus Torvalds return -EINVAL; 14223ff50b79SStephen Hemminger } 14231da177e4SLinus Torvalds 14241da177e4SLinus Torvalds switch (p->sel.family) { 14251da177e4SLinus Torvalds case AF_INET: 142607bf7908SSteffen Klassert if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) 142707bf7908SSteffen Klassert return -EINVAL; 142807bf7908SSteffen Klassert 14291da177e4SLinus Torvalds break; 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds case AF_INET6: 1432dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 143307bf7908SSteffen Klassert if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) 143407bf7908SSteffen Klassert return -EINVAL; 143507bf7908SSteffen Klassert 14361da177e4SLinus Torvalds break; 14371da177e4SLinus Torvalds #else 14381da177e4SLinus Torvalds return -EAFNOSUPPORT; 14391da177e4SLinus Torvalds #endif 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds default: 14421da177e4SLinus Torvalds return -EINVAL; 14433ff50b79SStephen Hemminger } 14441da177e4SLinus Torvalds 1445e682adf0SFan Du ret = verify_policy_dir(p->dir); 1446e682adf0SFan Du if (ret) 1447e682adf0SFan Du return ret; 1448b805d78dSYueHaibing if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) 1449e682adf0SFan Du return -EINVAL; 1450e682adf0SFan Du 1451e682adf0SFan Du return 0; 14521da177e4SLinus Torvalds } 14531da177e4SLinus Torvalds 14545424f32eSThomas Graf static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) 1455df71837dSTrent Jaeger { 14565424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 1457df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 1458df71837dSTrent Jaeger 1459df71837dSTrent Jaeger if (!rt) 1460df71837dSTrent Jaeger return 0; 1461df71837dSTrent Jaeger 14625424f32eSThomas Graf uctx = nla_data(rt); 146352a4c640SNikolay Aleksandrov return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); 1464df71837dSTrent Jaeger } 1465df71837dSTrent Jaeger 14661da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 14671da177e4SLinus Torvalds int nr) 14681da177e4SLinus Torvalds { 14691da177e4SLinus Torvalds int i; 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds xp->xfrm_nr = nr; 14721da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 14731da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 14741da177e4SLinus Torvalds 14751da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 14761da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 14771da177e4SLinus Torvalds sizeof(xfrm_address_t)); 14781da177e4SLinus Torvalds t->reqid = ut->reqid; 14791da177e4SLinus Torvalds t->mode = ut->mode; 14801da177e4SLinus Torvalds t->share = ut->share; 14811da177e4SLinus Torvalds t->optional = ut->optional; 14821da177e4SLinus Torvalds t->aalgos = ut->aalgos; 14831da177e4SLinus Torvalds t->ealgos = ut->ealgos; 14841da177e4SLinus Torvalds t->calgos = ut->calgos; 1485c5d18e98SHerbert Xu /* If all masks are ~0, then we allow all algorithms. */ 1486c5d18e98SHerbert Xu t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); 14878511d01dSMiika Komu t->encap_family = ut->family; 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds } 14901da177e4SLinus Torvalds 1491b4ad86bfSDavid S. Miller static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) 1492b4ad86bfSDavid S. Miller { 1493732706afSSteffen Klassert u16 prev_family; 1494b4ad86bfSDavid S. Miller int i; 1495b4ad86bfSDavid S. Miller 1496b4ad86bfSDavid S. Miller if (nr > XFRM_MAX_DEPTH) 1497b4ad86bfSDavid S. Miller return -EINVAL; 1498b4ad86bfSDavid S. Miller 1499732706afSSteffen Klassert prev_family = family; 1500732706afSSteffen Klassert 1501b4ad86bfSDavid S. Miller for (i = 0; i < nr; i++) { 1502b4ad86bfSDavid S. Miller /* We never validated the ut->family value, so many 1503b4ad86bfSDavid S. Miller * applications simply leave it at zero. The check was 1504b4ad86bfSDavid S. Miller * never made and ut->family was ignored because all 1505b4ad86bfSDavid S. Miller * templates could be assumed to have the same family as 1506b4ad86bfSDavid S. Miller * the policy itself. Now that we will have ipv4-in-ipv6 1507b4ad86bfSDavid S. Miller * and ipv6-in-ipv4 tunnels, this is no longer true. 1508b4ad86bfSDavid S. Miller */ 1509b4ad86bfSDavid S. Miller if (!ut[i].family) 1510b4ad86bfSDavid S. Miller ut[i].family = family; 1511b4ad86bfSDavid S. Miller 151235e61038SFlorian Westphal switch (ut[i].mode) { 151335e61038SFlorian Westphal case XFRM_MODE_TUNNEL: 151435e61038SFlorian Westphal case XFRM_MODE_BEET: 151535e61038SFlorian Westphal break; 151635e61038SFlorian Westphal default: 151735e61038SFlorian Westphal if (ut[i].family != prev_family) 1518732706afSSteffen Klassert return -EINVAL; 151935e61038SFlorian Westphal break; 152035e61038SFlorian Westphal } 152132bf94fbSSean Tranchetti if (ut[i].mode >= XFRM_MODE_MAX) 152232bf94fbSSean Tranchetti return -EINVAL; 152332bf94fbSSean Tranchetti 1524732706afSSteffen Klassert prev_family = ut[i].family; 1525732706afSSteffen Klassert 1526b4ad86bfSDavid S. Miller switch (ut[i].family) { 1527b4ad86bfSDavid S. Miller case AF_INET: 1528b4ad86bfSDavid S. Miller break; 1529dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 1530b4ad86bfSDavid S. Miller case AF_INET6: 1531b4ad86bfSDavid S. Miller break; 1532b4ad86bfSDavid S. Miller #endif 1533b4ad86bfSDavid S. Miller default: 1534b4ad86bfSDavid S. Miller return -EINVAL; 15353ff50b79SStephen Hemminger } 15366a53b759SCong Wang 1537dbb2483bSCong Wang if (!xfrm_id_proto_valid(ut[i].id.proto)) 15386a53b759SCong Wang return -EINVAL; 15396a53b759SCong Wang } 15406a53b759SCong Wang 1541b4ad86bfSDavid S. Miller return 0; 1542b4ad86bfSDavid S. Miller } 1543b4ad86bfSDavid S. Miller 15445424f32eSThomas Graf static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) 15451da177e4SLinus Torvalds { 15465424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvalds if (!rt) { 15491da177e4SLinus Torvalds pol->xfrm_nr = 0; 15501da177e4SLinus Torvalds } else { 15515424f32eSThomas Graf struct xfrm_user_tmpl *utmpl = nla_data(rt); 15525424f32eSThomas Graf int nr = nla_len(rt) / sizeof(*utmpl); 1553b4ad86bfSDavid S. Miller int err; 15541da177e4SLinus Torvalds 1555b4ad86bfSDavid S. Miller err = validate_tmpl(nr, utmpl, pol->family); 1556b4ad86bfSDavid S. Miller if (err) 1557b4ad86bfSDavid S. Miller return err; 15581da177e4SLinus Torvalds 15595424f32eSThomas Graf copy_templates(pol, utmpl, nr); 15601da177e4SLinus Torvalds } 15611da177e4SLinus Torvalds return 0; 15621da177e4SLinus Torvalds } 15631da177e4SLinus Torvalds 15645424f32eSThomas Graf static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) 1565f7b6983fSMasahide NAKAMURA { 15665424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; 1567f7b6983fSMasahide NAKAMURA struct xfrm_userpolicy_type *upt; 1568b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 1569f7b6983fSMasahide NAKAMURA int err; 1570f7b6983fSMasahide NAKAMURA 1571f7b6983fSMasahide NAKAMURA if (rt) { 15725424f32eSThomas Graf upt = nla_data(rt); 1573f7b6983fSMasahide NAKAMURA type = upt->type; 1574f7b6983fSMasahide NAKAMURA } 1575f7b6983fSMasahide NAKAMURA 1576f7b6983fSMasahide NAKAMURA err = verify_policy_type(type); 1577f7b6983fSMasahide NAKAMURA if (err) 1578f7b6983fSMasahide NAKAMURA return err; 1579f7b6983fSMasahide NAKAMURA 1580f7b6983fSMasahide NAKAMURA *tp = type; 1581f7b6983fSMasahide NAKAMURA return 0; 1582f7b6983fSMasahide NAKAMURA } 1583f7b6983fSMasahide NAKAMURA 15841da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 15851da177e4SLinus Torvalds { 15861da177e4SLinus Torvalds xp->priority = p->priority; 15871da177e4SLinus Torvalds xp->index = p->index; 15881da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 15891da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 15901da177e4SLinus Torvalds xp->action = p->action; 15911da177e4SLinus Torvalds xp->flags = p->flags; 15921da177e4SLinus Torvalds xp->family = p->sel.family; 15931da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds 15961da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 15971da177e4SLinus Torvalds { 15987b789836SMathias Krause memset(p, 0, sizeof(*p)); 15991da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 16001da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 16011da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 16021da177e4SLinus Torvalds p->priority = xp->priority; 16031da177e4SLinus Torvalds p->index = xp->index; 16041da177e4SLinus Torvalds p->sel.family = xp->family; 16051da177e4SLinus Torvalds p->dir = dir; 16061da177e4SLinus Torvalds p->action = xp->action; 16071da177e4SLinus Torvalds p->flags = xp->flags; 16081da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 16091da177e4SLinus Torvalds } 16101da177e4SLinus Torvalds 1611fc34acd3SAlexey Dobriyan static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) 16121da177e4SLinus Torvalds { 1613fc34acd3SAlexey Dobriyan struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); 16141da177e4SLinus Torvalds int err; 16151da177e4SLinus Torvalds 16161da177e4SLinus Torvalds if (!xp) { 16171da177e4SLinus Torvalds *errp = -ENOMEM; 16181da177e4SLinus Torvalds return NULL; 16191da177e4SLinus Torvalds } 16201da177e4SLinus Torvalds 16211da177e4SLinus Torvalds copy_from_user_policy(xp, p); 1622df71837dSTrent Jaeger 162335a7aa08SThomas Graf err = copy_from_user_policy_type(&xp->type, attrs); 1624f7b6983fSMasahide NAKAMURA if (err) 1625f7b6983fSMasahide NAKAMURA goto error; 1626f7b6983fSMasahide NAKAMURA 162735a7aa08SThomas Graf if (!(err = copy_from_user_tmpl(xp, attrs))) 162835a7aa08SThomas Graf err = copy_from_user_sec_ctx(xp, attrs); 1629f7b6983fSMasahide NAKAMURA if (err) 1630f7b6983fSMasahide NAKAMURA goto error; 16311da177e4SLinus Torvalds 1632295fae56SJamal Hadi Salim xfrm_mark_get(attrs, &xp->mark); 1633295fae56SJamal Hadi Salim 16347e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 16357e652640SSteffen Klassert xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 16367e652640SSteffen Klassert 16371da177e4SLinus Torvalds return xp; 1638f7b6983fSMasahide NAKAMURA error: 1639f7b6983fSMasahide NAKAMURA *errp = err; 164012a169e7SHerbert Xu xp->walk.dead = 1; 164164c31b3fSWANG Cong xfrm_policy_destroy(xp); 1642f7b6983fSMasahide NAKAMURA return NULL; 16431da177e4SLinus Torvalds } 16441da177e4SLinus Torvalds 164522e70050SChristoph Hellwig static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 16465424f32eSThomas Graf struct nlattr **attrs) 16471da177e4SLinus Torvalds { 1648fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 16497b67c857SThomas Graf struct xfrm_userpolicy_info *p = nlmsg_data(nlh); 16501da177e4SLinus Torvalds struct xfrm_policy *xp; 165126b15dadSJamal Hadi Salim struct km_event c; 16521da177e4SLinus Torvalds int err; 16531da177e4SLinus Torvalds int excl; 16541da177e4SLinus Torvalds 16551da177e4SLinus Torvalds err = verify_newpolicy_info(p); 16561da177e4SLinus Torvalds if (err) 16571da177e4SLinus Torvalds return err; 165835a7aa08SThomas Graf err = verify_sec_ctx_len(attrs); 1659df71837dSTrent Jaeger if (err) 1660df71837dSTrent Jaeger return err; 16611da177e4SLinus Torvalds 1662fc34acd3SAlexey Dobriyan xp = xfrm_policy_construct(net, p, attrs, &err); 16631da177e4SLinus Torvalds if (!xp) 16641da177e4SLinus Torvalds return err; 16651da177e4SLinus Torvalds 166625985edcSLucas De Marchi /* shouldn't excl be based on nlh flags?? 166726b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 166826b15dadSJamal Hadi Salim * in netlink excl is a flag and you wouldnt need 166926b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 16701da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 16711da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 16722e71029eSTetsuo Handa xfrm_audit_policy_add(xp, err ? 0 : 1, true); 1673161a09e7SJoy Latten 16741da177e4SLinus Torvalds if (err) { 167503e1ad7bSPaul Moore security_xfrm_policy_free(xp->security); 16761da177e4SLinus Torvalds kfree(xp); 16771da177e4SLinus Torvalds return err; 16781da177e4SLinus Torvalds } 16791da177e4SLinus Torvalds 1680f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 168126b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 168215e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 168326b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 168426b15dadSJamal Hadi Salim 16851da177e4SLinus Torvalds xfrm_pol_put(xp); 16861da177e4SLinus Torvalds 16871da177e4SLinus Torvalds return 0; 16881da177e4SLinus Torvalds } 16891da177e4SLinus Torvalds 16901da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 16911da177e4SLinus Torvalds { 16921da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 16931da177e4SLinus Torvalds int i; 16941da177e4SLinus Torvalds 16951da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 16961da177e4SLinus Torvalds return 0; 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 16991da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 17001da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 17011da177e4SLinus Torvalds 17021f86840fSMathias Krause memset(up, 0, sizeof(*up)); 17031da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 17048511d01dSMiika Komu up->family = kp->encap_family; 17051da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 17061da177e4SLinus Torvalds up->reqid = kp->reqid; 17071da177e4SLinus Torvalds up->mode = kp->mode; 17081da177e4SLinus Torvalds up->share = kp->share; 17091da177e4SLinus Torvalds up->optional = kp->optional; 17101da177e4SLinus Torvalds up->aalgos = kp->aalgos; 17111da177e4SLinus Torvalds up->ealgos = kp->ealgos; 17121da177e4SLinus Torvalds up->calgos = kp->calgos; 17131da177e4SLinus Torvalds } 17141da177e4SLinus Torvalds 1715c0144beaSThomas Graf return nla_put(skb, XFRMA_TMPL, 1716c0144beaSThomas Graf sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); 1717df71837dSTrent Jaeger } 1718df71837dSTrent Jaeger 17190d681623SSerge Hallyn static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) 17200d681623SSerge Hallyn { 17210d681623SSerge Hallyn if (x->security) { 17220d681623SSerge Hallyn return copy_sec_ctx(x->security, skb); 17230d681623SSerge Hallyn } 17240d681623SSerge Hallyn return 0; 17250d681623SSerge Hallyn } 17260d681623SSerge Hallyn 17270d681623SSerge Hallyn static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) 17280d681623SSerge Hallyn { 17291d1e34ddSDavid S. Miller if (xp->security) 17300d681623SSerge Hallyn return copy_sec_ctx(xp->security, skb); 17310d681623SSerge Hallyn return 0; 17320d681623SSerge Hallyn } 1733a1b831f2SAlexey Dobriyan static inline unsigned int userpolicy_type_attrsize(void) 1734cfbfd45aSThomas Graf { 1735cfbfd45aSThomas Graf #ifdef CONFIG_XFRM_SUB_POLICY 1736cfbfd45aSThomas Graf return nla_total_size(sizeof(struct xfrm_userpolicy_type)); 1737cfbfd45aSThomas Graf #else 1738cfbfd45aSThomas Graf return 0; 1739cfbfd45aSThomas Graf #endif 1740cfbfd45aSThomas Graf } 17410d681623SSerge Hallyn 1742f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1743b798a9edSJamal Hadi Salim static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 1744f7b6983fSMasahide NAKAMURA { 174545c180bcSEric Dumazet struct xfrm_userpolicy_type upt; 174645c180bcSEric Dumazet 174745c180bcSEric Dumazet /* Sadly there are two holes in struct xfrm_userpolicy_type */ 174845c180bcSEric Dumazet memset(&upt, 0, sizeof(upt)); 174945c180bcSEric Dumazet upt.type = type; 1750f7b6983fSMasahide NAKAMURA 1751c0144beaSThomas Graf return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); 1752f7b6983fSMasahide NAKAMURA } 1753f7b6983fSMasahide NAKAMURA 1754f7b6983fSMasahide NAKAMURA #else 1755b798a9edSJamal Hadi Salim static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 1756f7b6983fSMasahide NAKAMURA { 1757f7b6983fSMasahide NAKAMURA return 0; 1758f7b6983fSMasahide NAKAMURA } 1759f7b6983fSMasahide NAKAMURA #endif 1760f7b6983fSMasahide NAKAMURA 17611da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 17621da177e4SLinus Torvalds { 17631da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 17641da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 17651da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 17661da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 17671da177e4SLinus Torvalds struct nlmsghdr *nlh; 17681d1e34ddSDavid S. Miller int err; 17691da177e4SLinus Torvalds 177015e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 177179b8b7f4SThomas Graf XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); 177279b8b7f4SThomas Graf if (nlh == NULL) 177379b8b7f4SThomas Graf return -EMSGSIZE; 17741da177e4SLinus Torvalds 17757b67c857SThomas Graf p = nlmsg_data(nlh); 17761da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 17771d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 17781d1e34ddSDavid S. Miller if (!err) 17791d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 17801d1e34ddSDavid S. Miller if (!err) 17811d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 17821d1e34ddSDavid S. Miller if (!err) 17831d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 17847e652640SSteffen Klassert if (!err) 17857e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 17861d1e34ddSDavid S. Miller if (err) { 17871d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 17881d1e34ddSDavid S. Miller return err; 17891d1e34ddSDavid S. Miller } 17909825069dSThomas Graf nlmsg_end(skb, nlh); 17911da177e4SLinus Torvalds return 0; 17921da177e4SLinus Torvalds } 17931da177e4SLinus Torvalds 17944c563f76STimo Teras static int xfrm_dump_policy_done(struct netlink_callback *cb) 17954c563f76STimo Teras { 17961137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 1797283bc9f3SFan Du struct net *net = sock_net(cb->skb->sk); 17984c563f76STimo Teras 1799283bc9f3SFan Du xfrm_policy_walk_done(walk, net); 18004c563f76STimo Teras return 0; 18014c563f76STimo Teras } 18024c563f76STimo Teras 18031137b5e2SHerbert Xu static int xfrm_dump_policy_start(struct netlink_callback *cb) 18041137b5e2SHerbert Xu { 18051137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 18061137b5e2SHerbert Xu 18071137b5e2SHerbert Xu BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args)); 18081137b5e2SHerbert Xu 18091137b5e2SHerbert Xu xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); 18101137b5e2SHerbert Xu return 0; 18111137b5e2SHerbert Xu } 18121137b5e2SHerbert Xu 18131da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 18141da177e4SLinus Torvalds { 1815fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 18161137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 18171da177e4SLinus Torvalds struct xfrm_dump_info info; 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds info.in_skb = cb->skb; 18201da177e4SLinus Torvalds info.out_skb = skb; 18211da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 18221da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 18234c563f76STimo Teras 1824fc34acd3SAlexey Dobriyan (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); 18251da177e4SLinus Torvalds 18261da177e4SLinus Torvalds return skb->len; 18271da177e4SLinus Torvalds } 18281da177e4SLinus Torvalds 18291da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 18301da177e4SLinus Torvalds struct xfrm_policy *xp, 18311da177e4SLinus Torvalds int dir, u32 seq) 18321da177e4SLinus Torvalds { 18331da177e4SLinus Torvalds struct xfrm_dump_info info; 18341da177e4SLinus Torvalds struct sk_buff *skb; 1835c2546372SMathias Krause int err; 18361da177e4SLinus Torvalds 18377deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 18381da177e4SLinus Torvalds if (!skb) 18391da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds info.in_skb = in_skb; 18421da177e4SLinus Torvalds info.out_skb = skb; 18431da177e4SLinus Torvalds info.nlmsg_seq = seq; 18441da177e4SLinus Torvalds info.nlmsg_flags = 0; 18451da177e4SLinus Torvalds 1846c2546372SMathias Krause err = dump_one_policy(xp, dir, 0, &info); 1847c2546372SMathias Krause if (err) { 18481da177e4SLinus Torvalds kfree_skb(skb); 1849c2546372SMathias Krause return ERR_PTR(err); 18501da177e4SLinus Torvalds } 18511da177e4SLinus Torvalds 18521da177e4SLinus Torvalds return skb; 18531da177e4SLinus Torvalds } 18541da177e4SLinus Torvalds 185522e70050SChristoph Hellwig static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 18565424f32eSThomas Graf struct nlattr **attrs) 18571da177e4SLinus Torvalds { 1858fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 18591da177e4SLinus Torvalds struct xfrm_policy *xp; 18601da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 1861b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 18621da177e4SLinus Torvalds int err; 186326b15dadSJamal Hadi Salim struct km_event c; 18641da177e4SLinus Torvalds int delete; 1865295fae56SJamal Hadi Salim struct xfrm_mark m; 1866295fae56SJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 18677e652640SSteffen Klassert u32 if_id = 0; 18681da177e4SLinus Torvalds 18697b67c857SThomas Graf p = nlmsg_data(nlh); 18701da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 18711da177e4SLinus Torvalds 187235a7aa08SThomas Graf err = copy_from_user_policy_type(&type, attrs); 1873f7b6983fSMasahide NAKAMURA if (err) 1874f7b6983fSMasahide NAKAMURA return err; 1875f7b6983fSMasahide NAKAMURA 18761da177e4SLinus Torvalds err = verify_policy_dir(p->dir); 18771da177e4SLinus Torvalds if (err) 18781da177e4SLinus Torvalds return err; 18791da177e4SLinus Torvalds 18807e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 18817e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 18827e652640SSteffen Klassert 18831da177e4SLinus Torvalds if (p->index) 18847e652640SSteffen Klassert xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err); 1885df71837dSTrent Jaeger else { 18865424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 188703e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 1888df71837dSTrent Jaeger 188935a7aa08SThomas Graf err = verify_sec_ctx_len(attrs); 1890df71837dSTrent Jaeger if (err) 1891df71837dSTrent Jaeger return err; 1892df71837dSTrent Jaeger 18932c8dd116SDenis V. Lunev ctx = NULL; 1894df71837dSTrent Jaeger if (rt) { 18955424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 1896df71837dSTrent Jaeger 189752a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 189803e1ad7bSPaul Moore if (err) 1899df71837dSTrent Jaeger return err; 19002c8dd116SDenis V. Lunev } 19017e652640SSteffen Klassert xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel, 19026f26b61eSJamal Hadi Salim ctx, delete, &err); 190303e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 1904df71837dSTrent Jaeger } 19051da177e4SLinus Torvalds if (xp == NULL) 19061da177e4SLinus Torvalds return -ENOENT; 19071da177e4SLinus Torvalds 19081da177e4SLinus Torvalds if (!delete) { 19091da177e4SLinus Torvalds struct sk_buff *resp_skb; 19101da177e4SLinus Torvalds 19111da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 19121da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 19131da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 19141da177e4SLinus Torvalds } else { 1915a6483b79SAlexey Dobriyan err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, 191615e47304SEric W. Biederman NETLINK_CB(skb).portid); 19171da177e4SLinus Torvalds } 191826b15dadSJamal Hadi Salim } else { 19192e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, err ? 0 : 1, true); 192013fcfbb0SDavid S. Miller 192113fcfbb0SDavid S. Miller if (err != 0) 1922c8c05a8eSCatherine Zhang goto out; 192313fcfbb0SDavid S. Miller 1924e7443892SHerbert Xu c.data.byid = p->index; 1925f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 192626b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 192715e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 192826b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 19291da177e4SLinus Torvalds } 19301da177e4SLinus Torvalds 1931c8c05a8eSCatherine Zhang out: 1932ef41aaa0SEric Paris xfrm_pol_put(xp); 19331da177e4SLinus Torvalds return err; 19341da177e4SLinus Torvalds } 19351da177e4SLinus Torvalds 193622e70050SChristoph Hellwig static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 19375424f32eSThomas Graf struct nlattr **attrs) 19381da177e4SLinus Torvalds { 1939fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 194026b15dadSJamal Hadi Salim struct km_event c; 19417b67c857SThomas Graf struct xfrm_usersa_flush *p = nlmsg_data(nlh); 19424aa2e62cSJoy Latten int err; 19431da177e4SLinus Torvalds 1944f75a2804SCong Wang err = xfrm_state_flush(net, p->proto, true, false); 19459e64cc95SJamal Hadi Salim if (err) { 19469e64cc95SJamal Hadi Salim if (err == -ESRCH) /* empty table */ 19479e64cc95SJamal Hadi Salim return 0; 1948069c474eSDavid S. Miller return err; 19499e64cc95SJamal Hadi Salim } 1950bf08867fSHerbert Xu c.data.proto = p->proto; 1951f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 195226b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 195315e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 19547067802eSAlexey Dobriyan c.net = net; 195526b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 195626b15dadSJamal Hadi Salim 19571da177e4SLinus Torvalds return 0; 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds 1960a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x) 19617deb2264SThomas Graf { 1962a1b831f2SAlexey Dobriyan unsigned int replay_size = x->replay_esn ? 1963d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn) : 1964d8647b79SSteffen Klassert sizeof(struct xfrm_replay_state); 1965d8647b79SSteffen Klassert 19667deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) 1967d8647b79SSteffen Klassert + nla_total_size(replay_size) 1968de95c4a4SNicolas Dichtel + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur)) 19696f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 19707deb2264SThomas Graf + nla_total_size(4) /* XFRM_AE_RTHR */ 19717deb2264SThomas Graf + nla_total_size(4); /* XFRM_AE_ETHR */ 19727deb2264SThomas Graf } 1973d51d081dSJamal Hadi Salim 1974214e005bSDavid S. Miller static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 1975d51d081dSJamal Hadi Salim { 1976d51d081dSJamal Hadi Salim struct xfrm_aevent_id *id; 1977d51d081dSJamal Hadi Salim struct nlmsghdr *nlh; 19781d1e34ddSDavid S. Miller int err; 1979d51d081dSJamal Hadi Salim 198015e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); 198179b8b7f4SThomas Graf if (nlh == NULL) 198279b8b7f4SThomas Graf return -EMSGSIZE; 1983d51d081dSJamal Hadi Salim 19847b67c857SThomas Graf id = nlmsg_data(nlh); 1985931e79d7SMathias Krause memset(&id->sa_id, 0, sizeof(id->sa_id)); 19862b5f6dccSJamal Hadi Salim memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); 1987d51d081dSJamal Hadi Salim id->sa_id.spi = x->id.spi; 1988d51d081dSJamal Hadi Salim id->sa_id.family = x->props.family; 1989d51d081dSJamal Hadi Salim id->sa_id.proto = x->id.proto; 19902b5f6dccSJamal Hadi Salim memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); 19912b5f6dccSJamal Hadi Salim id->reqid = x->props.reqid; 1992d51d081dSJamal Hadi Salim id->flags = c->data.aevent; 1993d51d081dSJamal Hadi Salim 1994d0fde795SDavid S. Miller if (x->replay_esn) { 19951d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 1996d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 19971d1e34ddSDavid S. Miller x->replay_esn); 1998d0fde795SDavid S. Miller } else { 19991d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 20001d1e34ddSDavid S. Miller &x->replay); 2001d0fde795SDavid S. Miller } 20021d1e34ddSDavid S. Miller if (err) 20031d1e34ddSDavid S. Miller goto out_cancel; 2004de95c4a4SNicolas Dichtel err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft, 2005de95c4a4SNicolas Dichtel XFRMA_PAD); 20061d1e34ddSDavid S. Miller if (err) 20071d1e34ddSDavid S. Miller goto out_cancel; 2008d8647b79SSteffen Klassert 20091d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_RTHR) { 20101d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); 20111d1e34ddSDavid S. Miller if (err) 20121d1e34ddSDavid S. Miller goto out_cancel; 20131d1e34ddSDavid S. Miller } 20141d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_ETHR) { 20151d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, 20161d1e34ddSDavid S. Miller x->replay_maxage * 10 / HZ); 20171d1e34ddSDavid S. Miller if (err) 20181d1e34ddSDavid S. Miller goto out_cancel; 20191d1e34ddSDavid S. Miller } 20201d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 20211d1e34ddSDavid S. Miller if (err) 20221d1e34ddSDavid S. Miller goto out_cancel; 20236f26b61eSJamal Hadi Salim 20247e652640SSteffen Klassert err = xfrm_if_id_put(skb, x->if_id); 20257e652640SSteffen Klassert if (err) 20267e652640SSteffen Klassert goto out_cancel; 20277e652640SSteffen Klassert 2028053c095aSJohannes Berg nlmsg_end(skb, nlh); 2029053c095aSJohannes Berg return 0; 2030d51d081dSJamal Hadi Salim 20311d1e34ddSDavid S. Miller out_cancel: 20329825069dSThomas Graf nlmsg_cancel(skb, nlh); 20331d1e34ddSDavid S. Miller return err; 2034d51d081dSJamal Hadi Salim } 2035d51d081dSJamal Hadi Salim 203622e70050SChristoph Hellwig static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 20375424f32eSThomas Graf struct nlattr **attrs) 2038d51d081dSJamal Hadi Salim { 2039fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2040d51d081dSJamal Hadi Salim struct xfrm_state *x; 2041d51d081dSJamal Hadi Salim struct sk_buff *r_skb; 2042d51d081dSJamal Hadi Salim int err; 2043d51d081dSJamal Hadi Salim struct km_event c; 20446f26b61eSJamal Hadi Salim u32 mark; 20456f26b61eSJamal Hadi Salim struct xfrm_mark m; 20467b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 2047d51d081dSJamal Hadi Salim struct xfrm_usersa_id *id = &p->sa_id; 2048d51d081dSJamal Hadi Salim 20496f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 20506f26b61eSJamal Hadi Salim 20516f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); 2052d8647b79SSteffen Klassert if (x == NULL) 2053d51d081dSJamal Hadi Salim return -ESRCH; 2054d8647b79SSteffen Klassert 2055d8647b79SSteffen Klassert r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 2056d8647b79SSteffen Klassert if (r_skb == NULL) { 2057d8647b79SSteffen Klassert xfrm_state_put(x); 2058d8647b79SSteffen Klassert return -ENOMEM; 2059d51d081dSJamal Hadi Salim } 2060d51d081dSJamal Hadi Salim 2061d51d081dSJamal Hadi Salim /* 2062d51d081dSJamal Hadi Salim * XXX: is this lock really needed - none of the other 2063d51d081dSJamal Hadi Salim * gets lock (the concern is things getting updated 2064d51d081dSJamal Hadi Salim * while we are still reading) - jhs 2065d51d081dSJamal Hadi Salim */ 2066d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 2067d51d081dSJamal Hadi Salim c.data.aevent = p->flags; 2068d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 206915e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 2070d51d081dSJamal Hadi Salim 20712fc5f83bSGustavo A. R. Silva err = build_aevent(r_skb, x, &c); 20722fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 20732fc5f83bSGustavo A. R. Silva 207415e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); 2075d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 2076d51d081dSJamal Hadi Salim xfrm_state_put(x); 2077d51d081dSJamal Hadi Salim return err; 2078d51d081dSJamal Hadi Salim } 2079d51d081dSJamal Hadi Salim 208022e70050SChristoph Hellwig static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 20815424f32eSThomas Graf struct nlattr **attrs) 2082d51d081dSJamal Hadi Salim { 2083fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2084d51d081dSJamal Hadi Salim struct xfrm_state *x; 2085d51d081dSJamal Hadi Salim struct km_event c; 2086d51d081dSJamal Hadi Salim int err = -EINVAL; 20876f26b61eSJamal Hadi Salim u32 mark = 0; 20886f26b61eSJamal Hadi Salim struct xfrm_mark m; 20897b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 20905424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 2091d8647b79SSteffen Klassert struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; 20925424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 20934e077237SMichael Rossberg struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 20944e077237SMichael Rossberg struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 2095d51d081dSJamal Hadi Salim 20964e077237SMichael Rossberg if (!lt && !rp && !re && !et && !rt) 2097d51d081dSJamal Hadi Salim return err; 2098d51d081dSJamal Hadi Salim 2099d51d081dSJamal Hadi Salim /* pedantic mode - thou shalt sayeth replaceth */ 2100d51d081dSJamal Hadi Salim if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) 2101d51d081dSJamal Hadi Salim return err; 2102d51d081dSJamal Hadi Salim 21036f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 21046f26b61eSJamal Hadi Salim 21056f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); 2106d51d081dSJamal Hadi Salim if (x == NULL) 2107d51d081dSJamal Hadi Salim return -ESRCH; 2108d51d081dSJamal Hadi Salim 2109d51d081dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 2110d51d081dSJamal Hadi Salim goto out; 2111d51d081dSJamal Hadi Salim 21124479ff76SSteffen Klassert err = xfrm_replay_verify_len(x->replay_esn, re); 2113e2b19125SSteffen Klassert if (err) 2114e2b19125SSteffen Klassert goto out; 2115e2b19125SSteffen Klassert 2116d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 2117e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 1); 2118d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 2119d51d081dSJamal Hadi Salim 2120d51d081dSJamal Hadi Salim c.event = nlh->nlmsg_type; 2121d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 212215e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 2123d51d081dSJamal Hadi Salim c.data.aevent = XFRM_AE_CU; 2124d51d081dSJamal Hadi Salim km_state_notify(x, &c); 2125d51d081dSJamal Hadi Salim err = 0; 2126d51d081dSJamal Hadi Salim out: 2127d51d081dSJamal Hadi Salim xfrm_state_put(x); 2128d51d081dSJamal Hadi Salim return err; 2129d51d081dSJamal Hadi Salim } 2130d51d081dSJamal Hadi Salim 213122e70050SChristoph Hellwig static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 21325424f32eSThomas Graf struct nlattr **attrs) 21331da177e4SLinus Torvalds { 2134fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 213526b15dadSJamal Hadi Salim struct km_event c; 2136b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 2137f7b6983fSMasahide NAKAMURA int err; 213826b15dadSJamal Hadi Salim 213935a7aa08SThomas Graf err = copy_from_user_policy_type(&type, attrs); 2140f7b6983fSMasahide NAKAMURA if (err) 2141f7b6983fSMasahide NAKAMURA return err; 2142f7b6983fSMasahide NAKAMURA 21432e71029eSTetsuo Handa err = xfrm_policy_flush(net, type, true); 21442f1eb65fSJamal Hadi Salim if (err) { 21452f1eb65fSJamal Hadi Salim if (err == -ESRCH) /* empty table */ 21462f1eb65fSJamal Hadi Salim return 0; 2147069c474eSDavid S. Miller return err; 21482f1eb65fSJamal Hadi Salim } 21492f1eb65fSJamal Hadi Salim 2150f7b6983fSMasahide NAKAMURA c.data.type = type; 2151f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 215226b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 215315e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 21547067802eSAlexey Dobriyan c.net = net; 215526b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 21561da177e4SLinus Torvalds return 0; 21571da177e4SLinus Torvalds } 21581da177e4SLinus Torvalds 215922e70050SChristoph Hellwig static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 21605424f32eSThomas Graf struct nlattr **attrs) 21616c5c8ca7SJamal Hadi Salim { 2162fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 21636c5c8ca7SJamal Hadi Salim struct xfrm_policy *xp; 21647b67c857SThomas Graf struct xfrm_user_polexpire *up = nlmsg_data(nlh); 21656c5c8ca7SJamal Hadi Salim struct xfrm_userpolicy_info *p = &up->pol; 2166b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 21676c5c8ca7SJamal Hadi Salim int err = -ENOENT; 2168295fae56SJamal Hadi Salim struct xfrm_mark m; 2169295fae56SJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 21707e652640SSteffen Klassert u32 if_id = 0; 21716c5c8ca7SJamal Hadi Salim 217235a7aa08SThomas Graf err = copy_from_user_policy_type(&type, attrs); 2173f7b6983fSMasahide NAKAMURA if (err) 2174f7b6983fSMasahide NAKAMURA return err; 2175f7b6983fSMasahide NAKAMURA 2176c8bf4d04STimo Teräs err = verify_policy_dir(p->dir); 2177c8bf4d04STimo Teräs if (err) 2178c8bf4d04STimo Teräs return err; 2179c8bf4d04STimo Teräs 21807e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 21817e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 21827e652640SSteffen Klassert 21836c5c8ca7SJamal Hadi Salim if (p->index) 21847e652640SSteffen Klassert xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err); 21856c5c8ca7SJamal Hadi Salim else { 21865424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 218703e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 21886c5c8ca7SJamal Hadi Salim 218935a7aa08SThomas Graf err = verify_sec_ctx_len(attrs); 21906c5c8ca7SJamal Hadi Salim if (err) 21916c5c8ca7SJamal Hadi Salim return err; 21926c5c8ca7SJamal Hadi Salim 21932c8dd116SDenis V. Lunev ctx = NULL; 21946c5c8ca7SJamal Hadi Salim if (rt) { 21955424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 21966c5c8ca7SJamal Hadi Salim 219752a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 219803e1ad7bSPaul Moore if (err) 21996c5c8ca7SJamal Hadi Salim return err; 22002c8dd116SDenis V. Lunev } 22017e652640SSteffen Klassert xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, 22026f26b61eSJamal Hadi Salim &p->sel, ctx, 0, &err); 220303e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 22046c5c8ca7SJamal Hadi Salim } 22056c5c8ca7SJamal Hadi Salim if (xp == NULL) 2206ef41aaa0SEric Paris return -ENOENT; 220703e1ad7bSPaul Moore 2208ea2dea9dSTimo Teräs if (unlikely(xp->walk.dead)) 22096c5c8ca7SJamal Hadi Salim goto out; 22106c5c8ca7SJamal Hadi Salim 22116c5c8ca7SJamal Hadi Salim err = 0; 22126c5c8ca7SJamal Hadi Salim if (up->hard) { 22136c5c8ca7SJamal Hadi Salim xfrm_policy_delete(xp, p->dir); 22142e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, 1, true); 22156c5c8ca7SJamal Hadi Salim } 2216c6bb8136SEric W. Biederman km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); 22176c5c8ca7SJamal Hadi Salim 22186c5c8ca7SJamal Hadi Salim out: 22196c5c8ca7SJamal Hadi Salim xfrm_pol_put(xp); 22206c5c8ca7SJamal Hadi Salim return err; 22216c5c8ca7SJamal Hadi Salim } 22226c5c8ca7SJamal Hadi Salim 222322e70050SChristoph Hellwig static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 22245424f32eSThomas Graf struct nlattr **attrs) 222553bc6b4dSJamal Hadi Salim { 2226fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 222753bc6b4dSJamal Hadi Salim struct xfrm_state *x; 222853bc6b4dSJamal Hadi Salim int err; 22297b67c857SThomas Graf struct xfrm_user_expire *ue = nlmsg_data(nlh); 223053bc6b4dSJamal Hadi Salim struct xfrm_usersa_info *p = &ue->state; 22316f26b61eSJamal Hadi Salim struct xfrm_mark m; 2232928497f0SNicolas Dichtel u32 mark = xfrm_mark_get(attrs, &m); 223353bc6b4dSJamal Hadi Salim 22346f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); 223553bc6b4dSJamal Hadi Salim 22363a765aa5SDavid S. Miller err = -ENOENT; 223753bc6b4dSJamal Hadi Salim if (x == NULL) 223853bc6b4dSJamal Hadi Salim return err; 223953bc6b4dSJamal Hadi Salim 224053bc6b4dSJamal Hadi Salim spin_lock_bh(&x->lock); 22413a765aa5SDavid S. Miller err = -EINVAL; 224253bc6b4dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 224353bc6b4dSJamal Hadi Salim goto out; 2244c6bb8136SEric W. Biederman km_state_expired(x, ue->hard, nlh->nlmsg_pid); 224553bc6b4dSJamal Hadi Salim 2246161a09e7SJoy Latten if (ue->hard) { 224753bc6b4dSJamal Hadi Salim __xfrm_state_delete(x); 22482e71029eSTetsuo Handa xfrm_audit_state_delete(x, 1, true); 2249161a09e7SJoy Latten } 22503a765aa5SDavid S. Miller err = 0; 225153bc6b4dSJamal Hadi Salim out: 225253bc6b4dSJamal Hadi Salim spin_unlock_bh(&x->lock); 225353bc6b4dSJamal Hadi Salim xfrm_state_put(x); 225453bc6b4dSJamal Hadi Salim return err; 225553bc6b4dSJamal Hadi Salim } 225653bc6b4dSJamal Hadi Salim 225722e70050SChristoph Hellwig static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, 22585424f32eSThomas Graf struct nlattr **attrs) 2259980ebd25SJamal Hadi Salim { 2260fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2261980ebd25SJamal Hadi Salim struct xfrm_policy *xp; 2262980ebd25SJamal Hadi Salim struct xfrm_user_tmpl *ut; 2263980ebd25SJamal Hadi Salim int i; 22645424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 22656f26b61eSJamal Hadi Salim struct xfrm_mark mark; 2266980ebd25SJamal Hadi Salim 22677b67c857SThomas Graf struct xfrm_user_acquire *ua = nlmsg_data(nlh); 2268fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 2269980ebd25SJamal Hadi Salim int err = -ENOMEM; 2270980ebd25SJamal Hadi Salim 2271980ebd25SJamal Hadi Salim if (!x) 2272d8eb9307SIlpo Järvinen goto nomem; 2273980ebd25SJamal Hadi Salim 22746f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &mark); 22756f26b61eSJamal Hadi Salim 2276980ebd25SJamal Hadi Salim err = verify_newpolicy_info(&ua->policy); 2277d8eb9307SIlpo Järvinen if (err) 227873efc324SVegard Nossum goto free_state; 2279980ebd25SJamal Hadi Salim 2280980ebd25SJamal Hadi Salim /* build an XP */ 2281fc34acd3SAlexey Dobriyan xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); 2282d8eb9307SIlpo Järvinen if (!xp) 2283d8eb9307SIlpo Järvinen goto free_state; 2284980ebd25SJamal Hadi Salim 2285980ebd25SJamal Hadi Salim memcpy(&x->id, &ua->id, sizeof(ua->id)); 2286980ebd25SJamal Hadi Salim memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); 2287980ebd25SJamal Hadi Salim memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); 22886f26b61eSJamal Hadi Salim xp->mark.m = x->mark.m = mark.m; 22896f26b61eSJamal Hadi Salim xp->mark.v = x->mark.v = mark.v; 22905424f32eSThomas Graf ut = nla_data(rt); 2291980ebd25SJamal Hadi Salim /* extract the templates and for each call km_key */ 2292980ebd25SJamal Hadi Salim for (i = 0; i < xp->xfrm_nr; i++, ut++) { 2293980ebd25SJamal Hadi Salim struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 2294980ebd25SJamal Hadi Salim memcpy(&x->id, &t->id, sizeof(x->id)); 2295980ebd25SJamal Hadi Salim x->props.mode = t->mode; 2296980ebd25SJamal Hadi Salim x->props.reqid = t->reqid; 2297980ebd25SJamal Hadi Salim x->props.family = ut->family; 2298980ebd25SJamal Hadi Salim t->aalgos = ua->aalgos; 2299980ebd25SJamal Hadi Salim t->ealgos = ua->ealgos; 2300980ebd25SJamal Hadi Salim t->calgos = ua->calgos; 2301980ebd25SJamal Hadi Salim err = km_query(x, t, xp); 2302980ebd25SJamal Hadi Salim 2303980ebd25SJamal Hadi Salim } 2304980ebd25SJamal Hadi Salim 23054a135e53SMathias Krause xfrm_state_free(x); 2306980ebd25SJamal Hadi Salim kfree(xp); 2307980ebd25SJamal Hadi Salim 2308980ebd25SJamal Hadi Salim return 0; 2309d8eb9307SIlpo Järvinen 2310d8eb9307SIlpo Järvinen free_state: 23114a135e53SMathias Krause xfrm_state_free(x); 2312d8eb9307SIlpo Järvinen nomem: 2313d8eb9307SIlpo Järvinen return err; 2314980ebd25SJamal Hadi Salim } 2315980ebd25SJamal Hadi Salim 23165c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 23175c79de6eSShinta Sugimoto static int copy_from_user_migrate(struct xfrm_migrate *ma, 231813c1d189SArnaud Ebalard struct xfrm_kmaddress *k, 23195424f32eSThomas Graf struct nlattr **attrs, int *num) 23205c79de6eSShinta Sugimoto { 23215424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_MIGRATE]; 23225c79de6eSShinta Sugimoto struct xfrm_user_migrate *um; 23235c79de6eSShinta Sugimoto int i, num_migrate; 23245c79de6eSShinta Sugimoto 232513c1d189SArnaud Ebalard if (k != NULL) { 232613c1d189SArnaud Ebalard struct xfrm_user_kmaddress *uk; 232713c1d189SArnaud Ebalard 232813c1d189SArnaud Ebalard uk = nla_data(attrs[XFRMA_KMADDRESS]); 232913c1d189SArnaud Ebalard memcpy(&k->local, &uk->local, sizeof(k->local)); 233013c1d189SArnaud Ebalard memcpy(&k->remote, &uk->remote, sizeof(k->remote)); 233113c1d189SArnaud Ebalard k->family = uk->family; 233213c1d189SArnaud Ebalard k->reserved = uk->reserved; 233313c1d189SArnaud Ebalard } 233413c1d189SArnaud Ebalard 23355424f32eSThomas Graf um = nla_data(rt); 23365424f32eSThomas Graf num_migrate = nla_len(rt) / sizeof(*um); 23375c79de6eSShinta Sugimoto 23385c79de6eSShinta Sugimoto if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) 23395c79de6eSShinta Sugimoto return -EINVAL; 23405c79de6eSShinta Sugimoto 23415c79de6eSShinta Sugimoto for (i = 0; i < num_migrate; i++, um++, ma++) { 23425c79de6eSShinta Sugimoto memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); 23435c79de6eSShinta Sugimoto memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); 23445c79de6eSShinta Sugimoto memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); 23455c79de6eSShinta Sugimoto memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); 23465c79de6eSShinta Sugimoto 23475c79de6eSShinta Sugimoto ma->proto = um->proto; 23485c79de6eSShinta Sugimoto ma->mode = um->mode; 23495c79de6eSShinta Sugimoto ma->reqid = um->reqid; 23505c79de6eSShinta Sugimoto 23515c79de6eSShinta Sugimoto ma->old_family = um->old_family; 23525c79de6eSShinta Sugimoto ma->new_family = um->new_family; 23535c79de6eSShinta Sugimoto } 23545c79de6eSShinta Sugimoto 23555c79de6eSShinta Sugimoto *num = i; 23565c79de6eSShinta Sugimoto return 0; 23575c79de6eSShinta Sugimoto } 23585c79de6eSShinta Sugimoto 23595c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 23605424f32eSThomas Graf struct nlattr **attrs) 23615c79de6eSShinta Sugimoto { 23627b67c857SThomas Graf struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); 23635c79de6eSShinta Sugimoto struct xfrm_migrate m[XFRM_MAX_DEPTH]; 236413c1d189SArnaud Ebalard struct xfrm_kmaddress km, *kmp; 23655c79de6eSShinta Sugimoto u8 type; 23665c79de6eSShinta Sugimoto int err; 23675c79de6eSShinta Sugimoto int n = 0; 23688d549c4fSFan Du struct net *net = sock_net(skb->sk); 23694ab47d47SAntony Antony struct xfrm_encap_tmpl *encap = NULL; 23705c79de6eSShinta Sugimoto 237135a7aa08SThomas Graf if (attrs[XFRMA_MIGRATE] == NULL) 2372cf5cb79fSThomas Graf return -EINVAL; 23735c79de6eSShinta Sugimoto 237413c1d189SArnaud Ebalard kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; 237513c1d189SArnaud Ebalard 23765424f32eSThomas Graf err = copy_from_user_policy_type(&type, attrs); 23775c79de6eSShinta Sugimoto if (err) 23785c79de6eSShinta Sugimoto return err; 23795c79de6eSShinta Sugimoto 238013c1d189SArnaud Ebalard err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); 23815c79de6eSShinta Sugimoto if (err) 23825c79de6eSShinta Sugimoto return err; 23835c79de6eSShinta Sugimoto 23845c79de6eSShinta Sugimoto if (!n) 23855c79de6eSShinta Sugimoto return 0; 23865c79de6eSShinta Sugimoto 23874ab47d47SAntony Antony if (attrs[XFRMA_ENCAP]) { 23884ab47d47SAntony Antony encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 23894ab47d47SAntony Antony sizeof(*encap), GFP_KERNEL); 23904ab47d47SAntony Antony if (!encap) 23915c79de6eSShinta Sugimoto return 0; 23925c79de6eSShinta Sugimoto } 23934ab47d47SAntony Antony 23944ab47d47SAntony Antony err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap); 23954ab47d47SAntony Antony 23964ab47d47SAntony Antony kfree(encap); 23974ab47d47SAntony Antony 23984ab47d47SAntony Antony return err; 23994ab47d47SAntony Antony } 24005c79de6eSShinta Sugimoto #else 24015c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 24025424f32eSThomas Graf struct nlattr **attrs) 24035c79de6eSShinta Sugimoto { 24045c79de6eSShinta Sugimoto return -ENOPROTOOPT; 24055c79de6eSShinta Sugimoto } 24065c79de6eSShinta Sugimoto #endif 24075c79de6eSShinta Sugimoto 24085c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 2409183cad12SDavid S. Miller static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) 24105c79de6eSShinta Sugimoto { 24115c79de6eSShinta Sugimoto struct xfrm_user_migrate um; 24125c79de6eSShinta Sugimoto 24135c79de6eSShinta Sugimoto memset(&um, 0, sizeof(um)); 24145c79de6eSShinta Sugimoto um.proto = m->proto; 24155c79de6eSShinta Sugimoto um.mode = m->mode; 24165c79de6eSShinta Sugimoto um.reqid = m->reqid; 24175c79de6eSShinta Sugimoto um.old_family = m->old_family; 24185c79de6eSShinta Sugimoto memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); 24195c79de6eSShinta Sugimoto memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); 24205c79de6eSShinta Sugimoto um.new_family = m->new_family; 24215c79de6eSShinta Sugimoto memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); 24225c79de6eSShinta Sugimoto memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); 24235c79de6eSShinta Sugimoto 2424c0144beaSThomas Graf return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); 24255c79de6eSShinta Sugimoto } 24265c79de6eSShinta Sugimoto 2427183cad12SDavid S. Miller static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) 242813c1d189SArnaud Ebalard { 242913c1d189SArnaud Ebalard struct xfrm_user_kmaddress uk; 243013c1d189SArnaud Ebalard 243113c1d189SArnaud Ebalard memset(&uk, 0, sizeof(uk)); 243213c1d189SArnaud Ebalard uk.family = k->family; 243313c1d189SArnaud Ebalard uk.reserved = k->reserved; 243413c1d189SArnaud Ebalard memcpy(&uk.local, &k->local, sizeof(uk.local)); 2435a1caa322SArnaud Ebalard memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); 243613c1d189SArnaud Ebalard 243713c1d189SArnaud Ebalard return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); 243813c1d189SArnaud Ebalard } 243913c1d189SArnaud Ebalard 2440a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma, 24418bafd730SAntony Antony int with_encp) 24427deb2264SThomas Graf { 24437deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) 244413c1d189SArnaud Ebalard + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) 24458bafd730SAntony Antony + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0) 24467deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) 24477deb2264SThomas Graf + userpolicy_type_attrsize(); 24487deb2264SThomas Graf } 24497deb2264SThomas Graf 2450183cad12SDavid S. Miller static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, 2451183cad12SDavid S. Miller int num_migrate, const struct xfrm_kmaddress *k, 24528bafd730SAntony Antony const struct xfrm_selector *sel, 24538bafd730SAntony Antony const struct xfrm_encap_tmpl *encap, u8 dir, u8 type) 24545c79de6eSShinta Sugimoto { 2455183cad12SDavid S. Miller const struct xfrm_migrate *mp; 24565c79de6eSShinta Sugimoto struct xfrm_userpolicy_id *pol_id; 24575c79de6eSShinta Sugimoto struct nlmsghdr *nlh; 24581d1e34ddSDavid S. Miller int i, err; 24595c79de6eSShinta Sugimoto 246079b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); 246179b8b7f4SThomas Graf if (nlh == NULL) 246279b8b7f4SThomas Graf return -EMSGSIZE; 24635c79de6eSShinta Sugimoto 24647b67c857SThomas Graf pol_id = nlmsg_data(nlh); 24655c79de6eSShinta Sugimoto /* copy data from selector, dir, and type to the pol_id */ 24665c79de6eSShinta Sugimoto memset(pol_id, 0, sizeof(*pol_id)); 24675c79de6eSShinta Sugimoto memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); 24685c79de6eSShinta Sugimoto pol_id->dir = dir; 24695c79de6eSShinta Sugimoto 24701d1e34ddSDavid S. Miller if (k != NULL) { 24711d1e34ddSDavid S. Miller err = copy_to_user_kmaddress(k, skb); 24721d1e34ddSDavid S. Miller if (err) 24731d1e34ddSDavid S. Miller goto out_cancel; 24741d1e34ddSDavid S. Miller } 24758bafd730SAntony Antony if (encap) { 24768bafd730SAntony Antony err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap); 24778bafd730SAntony Antony if (err) 24788bafd730SAntony Antony goto out_cancel; 24798bafd730SAntony Antony } 24801d1e34ddSDavid S. Miller err = copy_to_user_policy_type(type, skb); 24811d1e34ddSDavid S. Miller if (err) 24821d1e34ddSDavid S. Miller goto out_cancel; 24835c79de6eSShinta Sugimoto for (i = 0, mp = m ; i < num_migrate; i++, mp++) { 24841d1e34ddSDavid S. Miller err = copy_to_user_migrate(mp, skb); 24851d1e34ddSDavid S. Miller if (err) 24861d1e34ddSDavid S. Miller goto out_cancel; 24875c79de6eSShinta Sugimoto } 24885c79de6eSShinta Sugimoto 2489053c095aSJohannes Berg nlmsg_end(skb, nlh); 2490053c095aSJohannes Berg return 0; 24911d1e34ddSDavid S. Miller 24921d1e34ddSDavid S. Miller out_cancel: 24939825069dSThomas Graf nlmsg_cancel(skb, nlh); 24941d1e34ddSDavid S. Miller return err; 24955c79de6eSShinta Sugimoto } 24965c79de6eSShinta Sugimoto 2497183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2498183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 24998bafd730SAntony Antony const struct xfrm_kmaddress *k, 25008bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 25015c79de6eSShinta Sugimoto { 2502a6483b79SAlexey Dobriyan struct net *net = &init_net; 25035c79de6eSShinta Sugimoto struct sk_buff *skb; 25042fc5f83bSGustavo A. R. Silva int err; 25055c79de6eSShinta Sugimoto 25068bafd730SAntony Antony skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap), 25078bafd730SAntony Antony GFP_ATOMIC); 25085c79de6eSShinta Sugimoto if (skb == NULL) 25095c79de6eSShinta Sugimoto return -ENOMEM; 25105c79de6eSShinta Sugimoto 25115c79de6eSShinta Sugimoto /* build migrate */ 25122fc5f83bSGustavo A. R. Silva err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type); 25132fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 25145c79de6eSShinta Sugimoto 251521ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); 25165c79de6eSShinta Sugimoto } 25175c79de6eSShinta Sugimoto #else 2518183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2519183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 25208bafd730SAntony Antony const struct xfrm_kmaddress *k, 25218bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 25225c79de6eSShinta Sugimoto { 25235c79de6eSShinta Sugimoto return -ENOPROTOOPT; 25245c79de6eSShinta Sugimoto } 25255c79de6eSShinta Sugimoto #endif 2526d51d081dSJamal Hadi Salim 2527a7bd9a45SThomas Graf #define XMSGSIZE(type) sizeof(struct type) 2528492b558bSThomas Graf 2529492b558bSThomas Graf static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 253066f9a259SDavid S. Miller [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 2531492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2532492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2533492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 2534492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2535492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2536492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 2537980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 253853bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 2539492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 254066f9a259SDavid S. Miller [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 25416c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 2542492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 2543a7bd9a45SThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, 2544d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 2545d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 254697a64b45SMasahide NAKAMURA [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), 25475c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2548a7bd9a45SThomas Graf [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), 2549880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 2550a7bd9a45SThomas Graf [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 25511da177e4SLinus Torvalds }; 25521da177e4SLinus Torvalds 2553492b558bSThomas Graf #undef XMSGSIZE 2554492b558bSThomas Graf 2555cf5cb79fSThomas Graf static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { 2556c28e9304Sjamal [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, 2557c28e9304Sjamal [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, 2558c28e9304Sjamal [XFRMA_LASTUSED] = { .type = NLA_U64}, 2559c28e9304Sjamal [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, 25601a6509d9SHerbert Xu [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, 2561cf5cb79fSThomas Graf [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, 2562cf5cb79fSThomas Graf [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, 2563cf5cb79fSThomas Graf [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, 2564cf5cb79fSThomas Graf [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, 2565cf5cb79fSThomas Graf [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, 2566cf5cb79fSThomas Graf [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, 2567cf5cb79fSThomas Graf [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, 2568cf5cb79fSThomas Graf [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, 2569cf5cb79fSThomas Graf [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, 2570cf5cb79fSThomas Graf [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, 2571cf5cb79fSThomas Graf [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, 2572cf5cb79fSThomas Graf [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, 2573cf5cb79fSThomas Graf [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, 2574cf5cb79fSThomas Graf [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, 257513c1d189SArnaud Ebalard [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, 25766f26b61eSJamal Hadi Salim [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, 257735d2856bSMartin Willi [XFRMA_TFCPAD] = { .type = NLA_U32 }, 2578d8647b79SSteffen Klassert [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, 2579a947b0a9SNicolas Dichtel [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, 2580d3623099SNicolas Dichtel [XFRMA_PROTO] = { .type = NLA_U8 }, 2581870a2df4SNicolas Dichtel [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, 2582d77e38e6SSteffen Klassert [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) }, 25839b42c1f1SSteffen Klassert [XFRMA_SET_MARK] = { .type = NLA_U32 }, 25849b42c1f1SSteffen Klassert [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 }, 25857e652640SSteffen Klassert [XFRMA_IF_ID] = { .type = NLA_U32 }, 2586cf5cb79fSThomas Graf }; 2587cf5cb79fSThomas Graf 2588880a6fabSChristophe Gouault static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { 2589880a6fabSChristophe Gouault [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 2590880a6fabSChristophe Gouault [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 2591880a6fabSChristophe Gouault }; 2592880a6fabSChristophe Gouault 259305600a79SMathias Krause static const struct xfrm_link { 25945424f32eSThomas Graf int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); 25951137b5e2SHerbert Xu int (*start)(struct netlink_callback *); 25961da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 25974c563f76STimo Teras int (*done)(struct netlink_callback *); 2598880a6fabSChristophe Gouault const struct nla_policy *nla_pol; 2599880a6fabSChristophe Gouault int nla_max; 2600492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 2601492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 2602492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 2603492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 26044c563f76STimo Teras .dump = xfrm_dump_sa, 26054c563f76STimo Teras .done = xfrm_dump_sa_done }, 2606492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 2607492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 2608492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 26091137b5e2SHerbert Xu .start = xfrm_dump_policy_start, 26104c563f76STimo Teras .dump = xfrm_dump_policy, 26114c563f76STimo Teras .done = xfrm_dump_policy_done }, 2612492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 2613980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, 261453bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, 2615492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 2616492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 26176c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, 2618492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 2619492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 2620d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, 2621d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, 26225c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, 262328d8909bSJamal Hadi Salim [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, 2624880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, 2625880a6fabSChristophe Gouault .nla_pol = xfrma_spd_policy, 2626880a6fabSChristophe Gouault .nla_max = XFRMA_SPD_MAX }, 2627ecfd6b18SJamal Hadi Salim [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, 26281da177e4SLinus Torvalds }; 26291da177e4SLinus Torvalds 26302d4bc933SJohannes Berg static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 26312d4bc933SJohannes Berg struct netlink_ext_ack *extack) 26321da177e4SLinus Torvalds { 2633a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 263435a7aa08SThomas Graf struct nlattr *attrs[XFRMA_MAX+1]; 263505600a79SMathias Krause const struct xfrm_link *link; 2636a7bd9a45SThomas Graf int type, err; 26371da177e4SLinus Torvalds 26382bf8c476SAndy Lutomirski if (in_compat_syscall()) 263983e2d058SYi Zhao return -EOPNOTSUPP; 264074005991SFan Du 26411da177e4SLinus Torvalds type = nlh->nlmsg_type; 26421da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 26431d00a4ebSThomas Graf return -EINVAL; 26441da177e4SLinus Torvalds 26451da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 26461da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 26471da177e4SLinus Torvalds 26481da177e4SLinus Torvalds /* All operations require privileges, even GET */ 264990f62cf3SEric W. Biederman if (!netlink_net_capable(skb, CAP_NET_ADMIN)) 26501d00a4ebSThomas Graf return -EPERM; 26511da177e4SLinus Torvalds 2652492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 2653492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 2654b8f3ab42SDavid S. Miller (nlh->nlmsg_flags & NLM_F_DUMP)) { 26551da177e4SLinus Torvalds if (link->dump == NULL) 26561d00a4ebSThomas Graf return -EINVAL; 26571da177e4SLinus Torvalds 265880d326faSPablo Neira Ayuso { 265980d326faSPablo Neira Ayuso struct netlink_dump_control c = { 26601137b5e2SHerbert Xu .start = link->start, 266180d326faSPablo Neira Ayuso .dump = link->dump, 266280d326faSPablo Neira Ayuso .done = link->done, 266380d326faSPablo Neira Ayuso }; 266480d326faSPablo Neira Ayuso return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); 266580d326faSPablo Neira Ayuso } 26661da177e4SLinus Torvalds } 26671da177e4SLinus Torvalds 26688cb08174SJohannes Berg err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs, 2669880a6fabSChristophe Gouault link->nla_max ? : XFRMA_MAX, 2670fe52145fSJohannes Berg link->nla_pol ? : xfrma_policy, extack); 2671a7bd9a45SThomas Graf if (err < 0) 2672a7bd9a45SThomas Graf return err; 26731da177e4SLinus Torvalds 26741da177e4SLinus Torvalds if (link->doit == NULL) 26751d00a4ebSThomas Graf return -EINVAL; 26761da177e4SLinus Torvalds 26775424f32eSThomas Graf return link->doit(skb, nlh, attrs); 26781da177e4SLinus Torvalds } 26791da177e4SLinus Torvalds 2680cd40b7d3SDenis V. Lunev static void xfrm_netlink_rcv(struct sk_buff *skb) 26811da177e4SLinus Torvalds { 2682283bc9f3SFan Du struct net *net = sock_net(skb->sk); 2683283bc9f3SFan Du 2684283bc9f3SFan Du mutex_lock(&net->xfrm.xfrm_cfg_mutex); 2685cd40b7d3SDenis V. Lunev netlink_rcv_skb(skb, &xfrm_user_rcv_msg); 2686283bc9f3SFan Du mutex_unlock(&net->xfrm.xfrm_cfg_mutex); 26871da177e4SLinus Torvalds } 26881da177e4SLinus Torvalds 2689a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_expire_msgsize(void) 26907deb2264SThomas Graf { 26916f26b61eSJamal Hadi Salim return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) 26926f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)); 26937deb2264SThomas Graf } 26947deb2264SThomas Graf 2695214e005bSDavid S. Miller static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 26961da177e4SLinus Torvalds { 26971da177e4SLinus Torvalds struct xfrm_user_expire *ue; 26981da177e4SLinus Torvalds struct nlmsghdr *nlh; 26991d1e34ddSDavid S. Miller int err; 27001da177e4SLinus Torvalds 270115e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); 270279b8b7f4SThomas Graf if (nlh == NULL) 270379b8b7f4SThomas Graf return -EMSGSIZE; 27041da177e4SLinus Torvalds 27057b67c857SThomas Graf ue = nlmsg_data(nlh); 27061da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 2707d51d081dSJamal Hadi Salim ue->hard = (c->data.hard != 0) ? 1 : 0; 2708e3e5fc16SMathias Krause /* clear the padding bytes */ 2709e3e5fc16SMathias Krause memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard)); 27101da177e4SLinus Torvalds 27111d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 27121d1e34ddSDavid S. Miller if (err) 27131d1e34ddSDavid S. Miller return err; 27146f26b61eSJamal Hadi Salim 27157e652640SSteffen Klassert err = xfrm_if_id_put(skb, x->if_id); 27167e652640SSteffen Klassert if (err) 27177e652640SSteffen Klassert return err; 27187e652640SSteffen Klassert 2719053c095aSJohannes Berg nlmsg_end(skb, nlh); 2720053c095aSJohannes Berg return 0; 27211da177e4SLinus Torvalds } 27221da177e4SLinus Torvalds 2723214e005bSDavid S. Miller static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) 27241da177e4SLinus Torvalds { 2725fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 27261da177e4SLinus Torvalds struct sk_buff *skb; 27271da177e4SLinus Torvalds 27287deb2264SThomas Graf skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); 27291da177e4SLinus Torvalds if (skb == NULL) 27301da177e4SLinus Torvalds return -ENOMEM; 27311da177e4SLinus Torvalds 27326f26b61eSJamal Hadi Salim if (build_expire(skb, x, c) < 0) { 27336f26b61eSJamal Hadi Salim kfree_skb(skb); 27346f26b61eSJamal Hadi Salim return -EMSGSIZE; 27356f26b61eSJamal Hadi Salim } 27361da177e4SLinus Torvalds 273721ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 27381da177e4SLinus Torvalds } 27391da177e4SLinus Torvalds 2740214e005bSDavid S. Miller static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) 2741d51d081dSJamal Hadi Salim { 2742fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 2743d51d081dSJamal Hadi Salim struct sk_buff *skb; 27442fc5f83bSGustavo A. R. Silva int err; 2745d51d081dSJamal Hadi Salim 2746d8647b79SSteffen Klassert skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 2747d51d081dSJamal Hadi Salim if (skb == NULL) 2748d51d081dSJamal Hadi Salim return -ENOMEM; 2749d51d081dSJamal Hadi Salim 27502fc5f83bSGustavo A. R. Silva err = build_aevent(skb, x, c); 27512fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 2752d51d081dSJamal Hadi Salim 275321ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); 2754d51d081dSJamal Hadi Salim } 2755d51d081dSJamal Hadi Salim 2756214e005bSDavid S. Miller static int xfrm_notify_sa_flush(const struct km_event *c) 275726b15dadSJamal Hadi Salim { 27587067802eSAlexey Dobriyan struct net *net = c->net; 275926b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 276026b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 276126b15dadSJamal Hadi Salim struct sk_buff *skb; 27627deb2264SThomas Graf int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); 276326b15dadSJamal Hadi Salim 27647deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 276526b15dadSJamal Hadi Salim if (skb == NULL) 276626b15dadSJamal Hadi Salim return -ENOMEM; 276726b15dadSJamal Hadi Salim 276815e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); 276979b8b7f4SThomas Graf if (nlh == NULL) { 277079b8b7f4SThomas Graf kfree_skb(skb); 277179b8b7f4SThomas Graf return -EMSGSIZE; 277279b8b7f4SThomas Graf } 277326b15dadSJamal Hadi Salim 27747b67c857SThomas Graf p = nlmsg_data(nlh); 2775bf08867fSHerbert Xu p->proto = c->data.proto; 277626b15dadSJamal Hadi Salim 27779825069dSThomas Graf nlmsg_end(skb, nlh); 277826b15dadSJamal Hadi Salim 277921ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 278026b15dadSJamal Hadi Salim } 278126b15dadSJamal Hadi Salim 2782a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sa_len(struct xfrm_state *x) 278326b15dadSJamal Hadi Salim { 2784a1b831f2SAlexey Dobriyan unsigned int l = 0; 27851a6509d9SHerbert Xu if (x->aead) 27861a6509d9SHerbert Xu l += nla_total_size(aead_len(x->aead)); 27874447bb33SMartin Willi if (x->aalg) { 27884447bb33SMartin Willi l += nla_total_size(sizeof(struct xfrm_algo) + 27894447bb33SMartin Willi (x->aalg->alg_key_len + 7) / 8); 27904447bb33SMartin Willi l += nla_total_size(xfrm_alg_auth_len(x->aalg)); 27914447bb33SMartin Willi } 279226b15dadSJamal Hadi Salim if (x->ealg) 27930f99be0dSEric Dumazet l += nla_total_size(xfrm_alg_len(x->ealg)); 279426b15dadSJamal Hadi Salim if (x->calg) 27957deb2264SThomas Graf l += nla_total_size(sizeof(*x->calg)); 279626b15dadSJamal Hadi Salim if (x->encap) 27977deb2264SThomas Graf l += nla_total_size(sizeof(*x->encap)); 279835d2856bSMartin Willi if (x->tfcpad) 279935d2856bSMartin Willi l += nla_total_size(sizeof(x->tfcpad)); 2800d8647b79SSteffen Klassert if (x->replay_esn) 2801d8647b79SSteffen Klassert l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); 2802f293a5e3Sdingzhi else 2803f293a5e3Sdingzhi l += nla_total_size(sizeof(struct xfrm_replay_state)); 280468325d3bSHerbert Xu if (x->security) 280568325d3bSHerbert Xu l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + 280668325d3bSHerbert Xu x->security->ctx_len); 280768325d3bSHerbert Xu if (x->coaddr) 280868325d3bSHerbert Xu l += nla_total_size(sizeof(*x->coaddr)); 2809a947b0a9SNicolas Dichtel if (x->props.extra_flags) 2810a947b0a9SNicolas Dichtel l += nla_total_size(sizeof(x->props.extra_flags)); 2811d77e38e6SSteffen Klassert if (x->xso.dev) 2812d77e38e6SSteffen Klassert l += nla_total_size(sizeof(x->xso)); 28139b42c1f1SSteffen Klassert if (x->props.smark.v | x->props.smark.m) { 28149b42c1f1SSteffen Klassert l += nla_total_size(sizeof(x->props.smark.v)); 28159b42c1f1SSteffen Klassert l += nla_total_size(sizeof(x->props.smark.m)); 28169b42c1f1SSteffen Klassert } 28177e652640SSteffen Klassert if (x->if_id) 28187e652640SSteffen Klassert l += nla_total_size(sizeof(x->if_id)); 281968325d3bSHerbert Xu 2820d26f3984SHerbert Xu /* Must count x->lastused as it may become non-zero behind our back. */ 2821de95c4a4SNicolas Dichtel l += nla_total_size_64bit(sizeof(u64)); 282226b15dadSJamal Hadi Salim 282326b15dadSJamal Hadi Salim return l; 282426b15dadSJamal Hadi Salim } 282526b15dadSJamal Hadi Salim 2826214e005bSDavid S. Miller static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) 282726b15dadSJamal Hadi Salim { 2828fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 282926b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 28300603eac0SHerbert Xu struct xfrm_usersa_id *id; 283126b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 283226b15dadSJamal Hadi Salim struct sk_buff *skb; 2833a1b831f2SAlexey Dobriyan unsigned int len = xfrm_sa_len(x); 2834a1b831f2SAlexey Dobriyan unsigned int headlen; 2835a1b831f2SAlexey Dobriyan int err; 28360603eac0SHerbert Xu 28370603eac0SHerbert Xu headlen = sizeof(*p); 28380603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 28397deb2264SThomas Graf len += nla_total_size(headlen); 28400603eac0SHerbert Xu headlen = sizeof(*id); 28416f26b61eSJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 28420603eac0SHerbert Xu } 28437deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 284426b15dadSJamal Hadi Salim 28457deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 284626b15dadSJamal Hadi Salim if (skb == NULL) 284726b15dadSJamal Hadi Salim return -ENOMEM; 284826b15dadSJamal Hadi Salim 284915e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 28501d1e34ddSDavid S. Miller err = -EMSGSIZE; 285179b8b7f4SThomas Graf if (nlh == NULL) 28521d1e34ddSDavid S. Miller goto out_free_skb; 285326b15dadSJamal Hadi Salim 28547b67c857SThomas Graf p = nlmsg_data(nlh); 28550603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 2856c0144beaSThomas Graf struct nlattr *attr; 2857c0144beaSThomas Graf 28587b67c857SThomas Graf id = nlmsg_data(nlh); 285950329c8aSMathias Krause memset(id, 0, sizeof(*id)); 28600603eac0SHerbert Xu memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); 28610603eac0SHerbert Xu id->spi = x->id.spi; 28620603eac0SHerbert Xu id->family = x->props.family; 28630603eac0SHerbert Xu id->proto = x->id.proto; 28640603eac0SHerbert Xu 2865c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); 28661d1e34ddSDavid S. Miller err = -EMSGSIZE; 2867c0144beaSThomas Graf if (attr == NULL) 28681d1e34ddSDavid S. Miller goto out_free_skb; 2869c0144beaSThomas Graf 2870c0144beaSThomas Graf p = nla_data(attr); 28710603eac0SHerbert Xu } 28721d1e34ddSDavid S. Miller err = copy_to_user_state_extra(x, p, skb); 28731d1e34ddSDavid S. Miller if (err) 28741d1e34ddSDavid S. Miller goto out_free_skb; 287526b15dadSJamal Hadi Salim 28769825069dSThomas Graf nlmsg_end(skb, nlh); 287726b15dadSJamal Hadi Salim 287821ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 287926b15dadSJamal Hadi Salim 28801d1e34ddSDavid S. Miller out_free_skb: 288126b15dadSJamal Hadi Salim kfree_skb(skb); 28821d1e34ddSDavid S. Miller return err; 288326b15dadSJamal Hadi Salim } 288426b15dadSJamal Hadi Salim 2885214e005bSDavid S. Miller static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) 288626b15dadSJamal Hadi Salim { 288726b15dadSJamal Hadi Salim 288826b15dadSJamal Hadi Salim switch (c->event) { 2889f60f6b8fSHerbert Xu case XFRM_MSG_EXPIRE: 289026b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 2891d51d081dSJamal Hadi Salim case XFRM_MSG_NEWAE: 2892d51d081dSJamal Hadi Salim return xfrm_aevent_state_notify(x, c); 2893f60f6b8fSHerbert Xu case XFRM_MSG_DELSA: 2894f60f6b8fSHerbert Xu case XFRM_MSG_UPDSA: 2895f60f6b8fSHerbert Xu case XFRM_MSG_NEWSA: 289626b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 2897f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHSA: 289826b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 289926b15dadSJamal Hadi Salim default: 290062db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", 290162db5cfdSstephen hemminger c->event); 290226b15dadSJamal Hadi Salim break; 290326b15dadSJamal Hadi Salim } 290426b15dadSJamal Hadi Salim 290526b15dadSJamal Hadi Salim return 0; 290626b15dadSJamal Hadi Salim 290726b15dadSJamal Hadi Salim } 290826b15dadSJamal Hadi Salim 2909a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x, 29107deb2264SThomas Graf struct xfrm_policy *xp) 29117deb2264SThomas Graf { 29127deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) 29137deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 29146f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 29157deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(x->security)) 29167deb2264SThomas Graf + userpolicy_type_attrsize(); 29177deb2264SThomas Graf } 29187deb2264SThomas Graf 29191da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 292065e0736bSFan Du struct xfrm_tmpl *xt, struct xfrm_policy *xp) 29211da177e4SLinus Torvalds { 29221d1e34ddSDavid S. Miller __u32 seq = xfrm_get_acqseq(); 29231da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 29241da177e4SLinus Torvalds struct nlmsghdr *nlh; 29251d1e34ddSDavid S. Miller int err; 29261da177e4SLinus Torvalds 292779b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); 292879b8b7f4SThomas Graf if (nlh == NULL) 292979b8b7f4SThomas Graf return -EMSGSIZE; 29301da177e4SLinus Torvalds 29317b67c857SThomas Graf ua = nlmsg_data(nlh); 29321da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 29331da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 29341da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 293565e0736bSFan Du copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); 29361da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 29371da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 29381da177e4SLinus Torvalds ua->calgos = xt->calgos; 29391da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 29401da177e4SLinus Torvalds 29411d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 29421d1e34ddSDavid S. Miller if (!err) 29431d1e34ddSDavid S. Miller err = copy_to_user_state_sec_ctx(x, skb); 29441d1e34ddSDavid S. Miller if (!err) 29451d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 29461d1e34ddSDavid S. Miller if (!err) 29471d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 29487e652640SSteffen Klassert if (!err) 29497e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 29501d1e34ddSDavid S. Miller if (err) { 29511d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 29521d1e34ddSDavid S. Miller return err; 29531d1e34ddSDavid S. Miller } 29541da177e4SLinus Torvalds 2955053c095aSJohannes Berg nlmsg_end(skb, nlh); 2956053c095aSJohannes Berg return 0; 29571da177e4SLinus Torvalds } 29581da177e4SLinus Torvalds 29591da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 296065e0736bSFan Du struct xfrm_policy *xp) 29611da177e4SLinus Torvalds { 2962a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 29631da177e4SLinus Torvalds struct sk_buff *skb; 29642fc5f83bSGustavo A. R. Silva int err; 29651da177e4SLinus Torvalds 29667deb2264SThomas Graf skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); 29671da177e4SLinus Torvalds if (skb == NULL) 29681da177e4SLinus Torvalds return -ENOMEM; 29691da177e4SLinus Torvalds 29702fc5f83bSGustavo A. R. Silva err = build_acquire(skb, x, xt, xp); 29712fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 29721da177e4SLinus Torvalds 297321ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); 29741da177e4SLinus Torvalds } 29751da177e4SLinus Torvalds 29761da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 29771da177e4SLinus Torvalds * or more templates. 29781da177e4SLinus Torvalds */ 2979cb969f07SVenkat Yekkirala static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, 29801da177e4SLinus Torvalds u8 *data, int len, int *dir) 29811da177e4SLinus Torvalds { 2982fc34acd3SAlexey Dobriyan struct net *net = sock_net(sk); 29831da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 29841da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 29851da177e4SLinus Torvalds struct xfrm_policy *xp; 29861da177e4SLinus Torvalds int nr; 29871da177e4SLinus Torvalds 2988cb969f07SVenkat Yekkirala switch (sk->sk_family) { 29891da177e4SLinus Torvalds case AF_INET: 29901da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 29911da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 29921da177e4SLinus Torvalds return NULL; 29931da177e4SLinus Torvalds } 29941da177e4SLinus Torvalds break; 2995dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 29961da177e4SLinus Torvalds case AF_INET6: 29971da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 29981da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 29991da177e4SLinus Torvalds return NULL; 30001da177e4SLinus Torvalds } 30011da177e4SLinus Torvalds break; 30021da177e4SLinus Torvalds #endif 30031da177e4SLinus Torvalds default: 30041da177e4SLinus Torvalds *dir = -EINVAL; 30051da177e4SLinus Torvalds return NULL; 30061da177e4SLinus Torvalds } 30071da177e4SLinus Torvalds 30081da177e4SLinus Torvalds *dir = -EINVAL; 30091da177e4SLinus Torvalds 30101da177e4SLinus Torvalds if (len < sizeof(*p) || 30111da177e4SLinus Torvalds verify_newpolicy_info(p)) 30121da177e4SLinus Torvalds return NULL; 30131da177e4SLinus Torvalds 30141da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 3015b4ad86bfSDavid S. Miller if (validate_tmpl(nr, ut, p->sel.family)) 30161da177e4SLinus Torvalds return NULL; 30171da177e4SLinus Torvalds 3018a4f1bac6SHerbert Xu if (p->dir > XFRM_POLICY_OUT) 3019a4f1bac6SHerbert Xu return NULL; 3020a4f1bac6SHerbert Xu 30212f09a4d5SHerbert Xu xp = xfrm_policy_alloc(net, GFP_ATOMIC); 30221da177e4SLinus Torvalds if (xp == NULL) { 30231da177e4SLinus Torvalds *dir = -ENOBUFS; 30241da177e4SLinus Torvalds return NULL; 30251da177e4SLinus Torvalds } 30261da177e4SLinus Torvalds 30271da177e4SLinus Torvalds copy_from_user_policy(xp, p); 3028f7b6983fSMasahide NAKAMURA xp->type = XFRM_POLICY_TYPE_MAIN; 30291da177e4SLinus Torvalds copy_templates(xp, ut, nr); 30301da177e4SLinus Torvalds 30311da177e4SLinus Torvalds *dir = p->dir; 30321da177e4SLinus Torvalds 30331da177e4SLinus Torvalds return xp; 30341da177e4SLinus Torvalds } 30351da177e4SLinus Torvalds 3036a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp) 30377deb2264SThomas Graf { 30387deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) 30397deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 30407deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) 3041295fae56SJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 30427deb2264SThomas Graf + userpolicy_type_attrsize(); 30437deb2264SThomas Graf } 30447deb2264SThomas Graf 30451da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 3046214e005bSDavid S. Miller int dir, const struct km_event *c) 30471da177e4SLinus Torvalds { 30481da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 3049d51d081dSJamal Hadi Salim int hard = c->data.hard; 30501d1e34ddSDavid S. Miller struct nlmsghdr *nlh; 30511d1e34ddSDavid S. Miller int err; 30521da177e4SLinus Torvalds 305315e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); 305479b8b7f4SThomas Graf if (nlh == NULL) 305579b8b7f4SThomas Graf return -EMSGSIZE; 30561da177e4SLinus Torvalds 30577b67c857SThomas Graf upe = nlmsg_data(nlh); 30581da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 30591d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 30601d1e34ddSDavid S. Miller if (!err) 30611d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 30621d1e34ddSDavid S. Miller if (!err) 30631d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 30641d1e34ddSDavid S. Miller if (!err) 30651d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 30667e652640SSteffen Klassert if (!err) 30677e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 30681d1e34ddSDavid S. Miller if (err) { 30691d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 30701d1e34ddSDavid S. Miller return err; 30711d1e34ddSDavid S. Miller } 30721da177e4SLinus Torvalds upe->hard = !!hard; 30731da177e4SLinus Torvalds 3074053c095aSJohannes Berg nlmsg_end(skb, nlh); 3075053c095aSJohannes Berg return 0; 30761da177e4SLinus Torvalds } 30771da177e4SLinus Torvalds 3078214e005bSDavid S. Miller static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 30791da177e4SLinus Torvalds { 3080fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 30811da177e4SLinus Torvalds struct sk_buff *skb; 30822fc5f83bSGustavo A. R. Silva int err; 30831da177e4SLinus Torvalds 30847deb2264SThomas Graf skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); 30851da177e4SLinus Torvalds if (skb == NULL) 30861da177e4SLinus Torvalds return -ENOMEM; 30871da177e4SLinus Torvalds 30882fc5f83bSGustavo A. R. Silva err = build_polexpire(skb, xp, dir, c); 30892fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 30901da177e4SLinus Torvalds 309121ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 30921da177e4SLinus Torvalds } 30931da177e4SLinus Torvalds 3094214e005bSDavid S. Miller static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) 309526b15dadSJamal Hadi Salim { 3096a1b831f2SAlexey Dobriyan unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 3097fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 309826b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 30990603eac0SHerbert Xu struct xfrm_userpolicy_id *id; 310026b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 310126b15dadSJamal Hadi Salim struct sk_buff *skb; 3102a1b831f2SAlexey Dobriyan unsigned int headlen; 3103a1b831f2SAlexey Dobriyan int err; 31040603eac0SHerbert Xu 31050603eac0SHerbert Xu headlen = sizeof(*p); 31060603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 31077deb2264SThomas Graf len += nla_total_size(headlen); 31080603eac0SHerbert Xu headlen = sizeof(*id); 31090603eac0SHerbert Xu } 3110cfbfd45aSThomas Graf len += userpolicy_type_attrsize(); 3111295fae56SJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 31127deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 311326b15dadSJamal Hadi Salim 31147deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 311526b15dadSJamal Hadi Salim if (skb == NULL) 311626b15dadSJamal Hadi Salim return -ENOMEM; 311726b15dadSJamal Hadi Salim 311815e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 31191d1e34ddSDavid S. Miller err = -EMSGSIZE; 312079b8b7f4SThomas Graf if (nlh == NULL) 31211d1e34ddSDavid S. Miller goto out_free_skb; 312226b15dadSJamal Hadi Salim 31237b67c857SThomas Graf p = nlmsg_data(nlh); 31240603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 3125c0144beaSThomas Graf struct nlattr *attr; 3126c0144beaSThomas Graf 31277b67c857SThomas Graf id = nlmsg_data(nlh); 31280603eac0SHerbert Xu memset(id, 0, sizeof(*id)); 31290603eac0SHerbert Xu id->dir = dir; 31300603eac0SHerbert Xu if (c->data.byid) 31310603eac0SHerbert Xu id->index = xp->index; 31320603eac0SHerbert Xu else 31330603eac0SHerbert Xu memcpy(&id->sel, &xp->selector, sizeof(id->sel)); 31340603eac0SHerbert Xu 3135c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); 31361d1e34ddSDavid S. Miller err = -EMSGSIZE; 3137c0144beaSThomas Graf if (attr == NULL) 31381d1e34ddSDavid S. Miller goto out_free_skb; 3139c0144beaSThomas Graf 3140c0144beaSThomas Graf p = nla_data(attr); 31410603eac0SHerbert Xu } 314226b15dadSJamal Hadi Salim 314326b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 31441d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 31451d1e34ddSDavid S. Miller if (!err) 31461d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 31471d1e34ddSDavid S. Miller if (!err) 31481d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 31497e652640SSteffen Klassert if (!err) 31507e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 31511d1e34ddSDavid S. Miller if (err) 31521d1e34ddSDavid S. Miller goto out_free_skb; 3153295fae56SJamal Hadi Salim 31549825069dSThomas Graf nlmsg_end(skb, nlh); 315526b15dadSJamal Hadi Salim 315621ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 315726b15dadSJamal Hadi Salim 31581d1e34ddSDavid S. Miller out_free_skb: 315926b15dadSJamal Hadi Salim kfree_skb(skb); 31601d1e34ddSDavid S. Miller return err; 316126b15dadSJamal Hadi Salim } 316226b15dadSJamal Hadi Salim 3163214e005bSDavid S. Miller static int xfrm_notify_policy_flush(const struct km_event *c) 316426b15dadSJamal Hadi Salim { 31657067802eSAlexey Dobriyan struct net *net = c->net; 316626b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 316726b15dadSJamal Hadi Salim struct sk_buff *skb; 31681d1e34ddSDavid S. Miller int err; 316926b15dadSJamal Hadi Salim 31707deb2264SThomas Graf skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); 317126b15dadSJamal Hadi Salim if (skb == NULL) 317226b15dadSJamal Hadi Salim return -ENOMEM; 317326b15dadSJamal Hadi Salim 317415e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); 31751d1e34ddSDavid S. Miller err = -EMSGSIZE; 317679b8b7f4SThomas Graf if (nlh == NULL) 31771d1e34ddSDavid S. Miller goto out_free_skb; 31781d1e34ddSDavid S. Miller err = copy_to_user_policy_type(c->data.type, skb); 31791d1e34ddSDavid S. Miller if (err) 31801d1e34ddSDavid S. Miller goto out_free_skb; 318126b15dadSJamal Hadi Salim 31829825069dSThomas Graf nlmsg_end(skb, nlh); 318326b15dadSJamal Hadi Salim 318421ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 318526b15dadSJamal Hadi Salim 31861d1e34ddSDavid S. Miller out_free_skb: 318726b15dadSJamal Hadi Salim kfree_skb(skb); 31881d1e34ddSDavid S. Miller return err; 318926b15dadSJamal Hadi Salim } 319026b15dadSJamal Hadi Salim 3191214e005bSDavid S. Miller static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 319226b15dadSJamal Hadi Salim { 319326b15dadSJamal Hadi Salim 319426b15dadSJamal Hadi Salim switch (c->event) { 3195f60f6b8fSHerbert Xu case XFRM_MSG_NEWPOLICY: 3196f60f6b8fSHerbert Xu case XFRM_MSG_UPDPOLICY: 3197f60f6b8fSHerbert Xu case XFRM_MSG_DELPOLICY: 319826b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 3199f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHPOLICY: 320026b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 3201f60f6b8fSHerbert Xu case XFRM_MSG_POLEXPIRE: 320226b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 320326b15dadSJamal Hadi Salim default: 320462db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", 320562db5cfdSstephen hemminger c->event); 320626b15dadSJamal Hadi Salim } 320726b15dadSJamal Hadi Salim 320826b15dadSJamal Hadi Salim return 0; 320926b15dadSJamal Hadi Salim 321026b15dadSJamal Hadi Salim } 321126b15dadSJamal Hadi Salim 3212a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_report_msgsize(void) 32137deb2264SThomas Graf { 32147deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); 32157deb2264SThomas Graf } 32167deb2264SThomas Graf 321797a64b45SMasahide NAKAMURA static int build_report(struct sk_buff *skb, u8 proto, 321897a64b45SMasahide NAKAMURA struct xfrm_selector *sel, xfrm_address_t *addr) 321997a64b45SMasahide NAKAMURA { 322097a64b45SMasahide NAKAMURA struct xfrm_user_report *ur; 322197a64b45SMasahide NAKAMURA struct nlmsghdr *nlh; 322297a64b45SMasahide NAKAMURA 322379b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); 322479b8b7f4SThomas Graf if (nlh == NULL) 322579b8b7f4SThomas Graf return -EMSGSIZE; 322697a64b45SMasahide NAKAMURA 32277b67c857SThomas Graf ur = nlmsg_data(nlh); 322897a64b45SMasahide NAKAMURA ur->proto = proto; 322997a64b45SMasahide NAKAMURA memcpy(&ur->sel, sel, sizeof(ur->sel)); 323097a64b45SMasahide NAKAMURA 32311d1e34ddSDavid S. Miller if (addr) { 32321d1e34ddSDavid S. Miller int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); 32331d1e34ddSDavid S. Miller if (err) { 32349825069dSThomas Graf nlmsg_cancel(skb, nlh); 32351d1e34ddSDavid S. Miller return err; 32361d1e34ddSDavid S. Miller } 32371d1e34ddSDavid S. Miller } 3238053c095aSJohannes Berg nlmsg_end(skb, nlh); 3239053c095aSJohannes Berg return 0; 324097a64b45SMasahide NAKAMURA } 324197a64b45SMasahide NAKAMURA 3242db983c11SAlexey Dobriyan static int xfrm_send_report(struct net *net, u8 proto, 3243db983c11SAlexey Dobriyan struct xfrm_selector *sel, xfrm_address_t *addr) 324497a64b45SMasahide NAKAMURA { 324597a64b45SMasahide NAKAMURA struct sk_buff *skb; 32462fc5f83bSGustavo A. R. Silva int err; 324797a64b45SMasahide NAKAMURA 32487deb2264SThomas Graf skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); 324997a64b45SMasahide NAKAMURA if (skb == NULL) 325097a64b45SMasahide NAKAMURA return -ENOMEM; 325197a64b45SMasahide NAKAMURA 32522fc5f83bSGustavo A. R. Silva err = build_report(skb, proto, sel, addr); 32532fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 325497a64b45SMasahide NAKAMURA 325521ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); 325697a64b45SMasahide NAKAMURA } 325797a64b45SMasahide NAKAMURA 3258a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_mapping_msgsize(void) 32593a2dfbe8SMartin Willi { 32603a2dfbe8SMartin Willi return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); 32613a2dfbe8SMartin Willi } 32623a2dfbe8SMartin Willi 32633a2dfbe8SMartin Willi static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, 32643a2dfbe8SMartin Willi xfrm_address_t *new_saddr, __be16 new_sport) 32653a2dfbe8SMartin Willi { 32663a2dfbe8SMartin Willi struct xfrm_user_mapping *um; 32673a2dfbe8SMartin Willi struct nlmsghdr *nlh; 32683a2dfbe8SMartin Willi 32693a2dfbe8SMartin Willi nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); 32703a2dfbe8SMartin Willi if (nlh == NULL) 32713a2dfbe8SMartin Willi return -EMSGSIZE; 32723a2dfbe8SMartin Willi 32733a2dfbe8SMartin Willi um = nlmsg_data(nlh); 32743a2dfbe8SMartin Willi 32753a2dfbe8SMartin Willi memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); 32763a2dfbe8SMartin Willi um->id.spi = x->id.spi; 32773a2dfbe8SMartin Willi um->id.family = x->props.family; 32783a2dfbe8SMartin Willi um->id.proto = x->id.proto; 32793a2dfbe8SMartin Willi memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); 32803a2dfbe8SMartin Willi memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); 32813a2dfbe8SMartin Willi um->new_sport = new_sport; 32823a2dfbe8SMartin Willi um->old_sport = x->encap->encap_sport; 32833a2dfbe8SMartin Willi um->reqid = x->props.reqid; 32843a2dfbe8SMartin Willi 3285053c095aSJohannes Berg nlmsg_end(skb, nlh); 3286053c095aSJohannes Berg return 0; 32873a2dfbe8SMartin Willi } 32883a2dfbe8SMartin Willi 32893a2dfbe8SMartin Willi static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, 32903a2dfbe8SMartin Willi __be16 sport) 32913a2dfbe8SMartin Willi { 3292a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 32933a2dfbe8SMartin Willi struct sk_buff *skb; 32942fc5f83bSGustavo A. R. Silva int err; 32953a2dfbe8SMartin Willi 32963a2dfbe8SMartin Willi if (x->id.proto != IPPROTO_ESP) 32973a2dfbe8SMartin Willi return -EINVAL; 32983a2dfbe8SMartin Willi 32993a2dfbe8SMartin Willi if (!x->encap) 33003a2dfbe8SMartin Willi return -EINVAL; 33013a2dfbe8SMartin Willi 33023a2dfbe8SMartin Willi skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); 33033a2dfbe8SMartin Willi if (skb == NULL) 33043a2dfbe8SMartin Willi return -ENOMEM; 33053a2dfbe8SMartin Willi 33062fc5f83bSGustavo A. R. Silva err = build_mapping(skb, x, ipaddr, sport); 33072fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 33083a2dfbe8SMartin Willi 330921ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); 33103a2dfbe8SMartin Willi } 33113a2dfbe8SMartin Willi 33120f24558eSHoria Geanta static bool xfrm_is_alive(const struct km_event *c) 33130f24558eSHoria Geanta { 33140f24558eSHoria Geanta return (bool)xfrm_acquire_is_on(c->net); 33150f24558eSHoria Geanta } 33160f24558eSHoria Geanta 33171da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 33181da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 33191da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 33201da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 33211da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 332297a64b45SMasahide NAKAMURA .report = xfrm_send_report, 33235c79de6eSShinta Sugimoto .migrate = xfrm_send_migrate, 33243a2dfbe8SMartin Willi .new_mapping = xfrm_send_mapping, 33250f24558eSHoria Geanta .is_alive = xfrm_is_alive, 33261da177e4SLinus Torvalds }; 33271da177e4SLinus Torvalds 3328a6483b79SAlexey Dobriyan static int __net_init xfrm_user_net_init(struct net *net) 33291da177e4SLinus Torvalds { 3330be33690dSPatrick McHardy struct sock *nlsk; 3331a31f2d17SPablo Neira Ayuso struct netlink_kernel_cfg cfg = { 3332a31f2d17SPablo Neira Ayuso .groups = XFRMNLGRP_MAX, 3333a31f2d17SPablo Neira Ayuso .input = xfrm_netlink_rcv, 3334a31f2d17SPablo Neira Ayuso }; 3335be33690dSPatrick McHardy 33369f00d977SPablo Neira Ayuso nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); 3337be33690dSPatrick McHardy if (nlsk == NULL) 33381da177e4SLinus Torvalds return -ENOMEM; 3339d79d792eSEric W. Biederman net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ 3340cf778b00SEric Dumazet rcu_assign_pointer(net->xfrm.nlsk, nlsk); 33411da177e4SLinus Torvalds return 0; 33421da177e4SLinus Torvalds } 33431da177e4SLinus Torvalds 3344d79d792eSEric W. Biederman static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) 3345a6483b79SAlexey Dobriyan { 3346d79d792eSEric W. Biederman struct net *net; 3347d79d792eSEric W. Biederman list_for_each_entry(net, net_exit_list, exit_list) 3348a9b3cd7fSStephen Hemminger RCU_INIT_POINTER(net->xfrm.nlsk, NULL); 3349d79d792eSEric W. Biederman synchronize_net(); 3350d79d792eSEric W. Biederman list_for_each_entry(net, net_exit_list, exit_list) 3351d79d792eSEric W. Biederman netlink_kernel_release(net->xfrm.nlsk_stash); 3352a6483b79SAlexey Dobriyan } 3353a6483b79SAlexey Dobriyan 3354a6483b79SAlexey Dobriyan static struct pernet_operations xfrm_user_net_ops = { 3355a6483b79SAlexey Dobriyan .init = xfrm_user_net_init, 3356d79d792eSEric W. Biederman .exit_batch = xfrm_user_net_exit, 3357a6483b79SAlexey Dobriyan }; 3358a6483b79SAlexey Dobriyan 3359a6483b79SAlexey Dobriyan static int __init xfrm_user_init(void) 3360a6483b79SAlexey Dobriyan { 3361a6483b79SAlexey Dobriyan int rv; 3362a6483b79SAlexey Dobriyan 3363a6483b79SAlexey Dobriyan printk(KERN_INFO "Initializing XFRM netlink socket\n"); 3364a6483b79SAlexey Dobriyan 3365a6483b79SAlexey Dobriyan rv = register_pernet_subsys(&xfrm_user_net_ops); 3366a6483b79SAlexey Dobriyan if (rv < 0) 3367a6483b79SAlexey Dobriyan return rv; 3368a6483b79SAlexey Dobriyan rv = xfrm_register_km(&netlink_mgr); 3369a6483b79SAlexey Dobriyan if (rv < 0) 3370a6483b79SAlexey Dobriyan unregister_pernet_subsys(&xfrm_user_net_ops); 3371a6483b79SAlexey Dobriyan return rv; 3372a6483b79SAlexey Dobriyan } 3373a6483b79SAlexey Dobriyan 33741da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 33751da177e4SLinus Torvalds { 33761da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 3377a6483b79SAlexey Dobriyan unregister_pernet_subsys(&xfrm_user_net_ops); 33781da177e4SLinus Torvalds } 33791da177e4SLinus Torvalds 33801da177e4SLinus Torvalds module_init(xfrm_user_init); 33811da177e4SLinus Torvalds module_exit(xfrm_user_exit); 33821da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 33834fdb3bb7SHarald Welte MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); 3384