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 14b6459415SJakub Kicinski #include <linux/compat.h> 159409f38aSHerbert Xu #include <linux/crypto.h> 161da177e4SLinus Torvalds #include <linux/module.h> 171da177e4SLinus Torvalds #include <linux/kernel.h> 181da177e4SLinus Torvalds #include <linux/types.h> 191da177e4SLinus Torvalds #include <linux/slab.h> 201da177e4SLinus Torvalds #include <linux/socket.h> 211da177e4SLinus Torvalds #include <linux/string.h> 221da177e4SLinus Torvalds #include <linux/net.h> 231da177e4SLinus Torvalds #include <linux/skbuff.h> 241da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 251da177e4SLinus Torvalds #include <linux/ipsec.h> 261da177e4SLinus Torvalds #include <linux/init.h> 271da177e4SLinus Torvalds #include <linux/security.h> 281da177e4SLinus Torvalds #include <net/sock.h> 291da177e4SLinus Torvalds #include <net/xfrm.h> 3088fc2c84SThomas Graf #include <net/netlink.h> 31fa6dd8a2SNicolas Dichtel #include <net/ah.h> 327c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 33dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 34e23c7194SMasahide NAKAMURA #include <linux/in6.h> 35e23c7194SMasahide NAKAMURA #endif 36e33d4f13SSowmini Varadhan #include <asm/unaligned.h> 371da177e4SLinus Torvalds 385424f32eSThomas Graf static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) 391da177e4SLinus Torvalds { 405424f32eSThomas Graf struct nlattr *rt = attrs[type]; 411da177e4SLinus Torvalds struct xfrm_algo *algp; 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds if (!rt) 441da177e4SLinus Torvalds return 0; 451da177e4SLinus Torvalds 465424f32eSThomas Graf algp = nla_data(rt); 4706cd22f8SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_alg_len(algp)) 4831c26852SHerbert Xu return -EINVAL; 4931c26852SHerbert Xu 501da177e4SLinus Torvalds switch (type) { 511da177e4SLinus Torvalds case XFRMA_ALG_AUTH: 521da177e4SLinus Torvalds case XFRMA_ALG_CRYPT: 531da177e4SLinus Torvalds case XFRMA_ALG_COMP: 541da177e4SLinus Torvalds break; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds default: 571da177e4SLinus Torvalds return -EINVAL; 583ff50b79SStephen Hemminger } 591da177e4SLinus Torvalds 60633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 611da177e4SLinus Torvalds return 0; 621da177e4SLinus Torvalds } 631da177e4SLinus Torvalds 644447bb33SMartin Willi static int verify_auth_trunc(struct nlattr **attrs) 654447bb33SMartin Willi { 664447bb33SMartin Willi struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; 674447bb33SMartin Willi struct xfrm_algo_auth *algp; 684447bb33SMartin Willi 694447bb33SMartin Willi if (!rt) 704447bb33SMartin Willi return 0; 714447bb33SMartin Willi 724447bb33SMartin Willi algp = nla_data(rt); 731bd963a7SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_alg_auth_len(algp)) 744447bb33SMartin Willi return -EINVAL; 754447bb33SMartin Willi 76633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 774447bb33SMartin Willi return 0; 784447bb33SMartin Willi } 794447bb33SMartin Willi 801a6509d9SHerbert Xu static int verify_aead(struct nlattr **attrs) 811a6509d9SHerbert Xu { 821a6509d9SHerbert Xu struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; 831a6509d9SHerbert Xu struct xfrm_algo_aead *algp; 841a6509d9SHerbert Xu 851a6509d9SHerbert Xu if (!rt) 861a6509d9SHerbert Xu return 0; 871a6509d9SHerbert Xu 881a6509d9SHerbert Xu algp = nla_data(rt); 89373b8eebSAlexey Dobriyan if (nla_len(rt) < (int)aead_len(algp)) 901a6509d9SHerbert Xu return -EINVAL; 911a6509d9SHerbert Xu 92633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 931a6509d9SHerbert Xu return 0; 941a6509d9SHerbert Xu } 951a6509d9SHerbert Xu 965424f32eSThomas Graf static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, 97eb2971b6SMasahide NAKAMURA xfrm_address_t **addrp) 98eb2971b6SMasahide NAKAMURA { 995424f32eSThomas Graf struct nlattr *rt = attrs[type]; 100eb2971b6SMasahide NAKAMURA 101cf5cb79fSThomas Graf if (rt && addrp) 1025424f32eSThomas Graf *addrp = nla_data(rt); 103eb2971b6SMasahide NAKAMURA } 104df71837dSTrent Jaeger 10508a717e4SSabrina Dubroca static inline int verify_sec_ctx_len(struct nlattr **attrs, struct netlink_ext_ack *extack) 106df71837dSTrent Jaeger { 1075424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 108df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 109df71837dSTrent Jaeger 110df71837dSTrent Jaeger if (!rt) 111df71837dSTrent Jaeger return 0; 112df71837dSTrent Jaeger 1135424f32eSThomas Graf uctx = nla_data(rt); 114171d449aSXin Long if (uctx->len > nla_len(rt) || 11508a717e4SSabrina Dubroca uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) { 11608a717e4SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid security context length"); 117df71837dSTrent Jaeger return -EINVAL; 11808a717e4SSabrina Dubroca } 119df71837dSTrent Jaeger 120df71837dSTrent Jaeger return 0; 121df71837dSTrent Jaeger } 122df71837dSTrent Jaeger 123d8647b79SSteffen Klassert static inline int verify_replay(struct xfrm_usersa_info *p, 124*785b87b2SSabrina Dubroca struct nlattr **attrs, 125*785b87b2SSabrina Dubroca struct netlink_ext_ack *extack) 126d8647b79SSteffen Klassert { 127d8647b79SSteffen Klassert struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; 128ecd79187SMathias Krause struct xfrm_replay_state_esn *rs; 129d8647b79SSteffen Klassert 130*785b87b2SSabrina Dubroca if (!rt) { 131*785b87b2SSabrina Dubroca if (p->flags & XFRM_STATE_ESN) { 132*785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for ESN"); 133*785b87b2SSabrina Dubroca return -EINVAL; 134*785b87b2SSabrina Dubroca } 135*785b87b2SSabrina Dubroca return 0; 136*785b87b2SSabrina Dubroca } 1377833aa05SSteffen Klassert 138ecd79187SMathias Krause rs = nla_data(rt); 139ecd79187SMathias Krause 140*785b87b2SSabrina Dubroca if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) { 141*785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN bitmap length must be <= 128"); 142ecd79187SMathias Krause return -EINVAL; 143*785b87b2SSabrina Dubroca } 144ecd79187SMathias Krause 1455e708e47SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) && 146*785b87b2SSabrina Dubroca nla_len(rt) != sizeof(*rs)) { 147*785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN attribute is too short to fit the full bitmap length"); 148ecd79187SMathias Krause return -EINVAL; 149*785b87b2SSabrina Dubroca } 150d8647b79SSteffen Klassert 15101714109SFan Du /* As only ESP and AH support ESN feature. */ 152*785b87b2SSabrina Dubroca if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) { 153*785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN only supported for ESP and AH"); 15402aadf72SSteffen Klassert return -EINVAL; 155*785b87b2SSabrina Dubroca } 15602aadf72SSteffen Klassert 157*785b87b2SSabrina Dubroca if (p->replay_window != 0) { 158*785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN not compatible with legacy replay_window"); 159d8647b79SSteffen Klassert return -EINVAL; 160*785b87b2SSabrina Dubroca } 161d8647b79SSteffen Klassert 162d8647b79SSteffen Klassert return 0; 163d8647b79SSteffen Klassert } 164df71837dSTrent Jaeger 1651da177e4SLinus Torvalds static int verify_newsa_info(struct xfrm_usersa_info *p, 1666999aae1SSabrina Dubroca struct nlattr **attrs, 1676999aae1SSabrina Dubroca struct netlink_ext_ack *extack) 1681da177e4SLinus Torvalds { 1691da177e4SLinus Torvalds int err; 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds err = -EINVAL; 1721da177e4SLinus Torvalds switch (p->family) { 1731da177e4SLinus Torvalds case AF_INET: 174b38ff407SAnirudh Gupta break; 175b38ff407SAnirudh Gupta 176b38ff407SAnirudh Gupta case AF_INET6: 177b38ff407SAnirudh Gupta #if IS_ENABLED(CONFIG_IPV6) 178b38ff407SAnirudh Gupta break; 179b38ff407SAnirudh Gupta #else 180b38ff407SAnirudh Gupta err = -EAFNOSUPPORT; 1816999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "IPv6 support disabled"); 182b38ff407SAnirudh Gupta goto out; 183b38ff407SAnirudh Gupta #endif 184b38ff407SAnirudh Gupta 185b38ff407SAnirudh Gupta default: 1866999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid address family"); 187b38ff407SAnirudh Gupta goto out; 188b38ff407SAnirudh Gupta } 189b38ff407SAnirudh Gupta 190b38ff407SAnirudh Gupta switch (p->sel.family) { 191b8d6d007SNicolas Dichtel case AF_UNSPEC: 192b8d6d007SNicolas Dichtel break; 193b8d6d007SNicolas Dichtel 194b38ff407SAnirudh Gupta case AF_INET: 1956999aae1SSabrina Dubroca if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) { 1966999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)"); 19707bf7908SSteffen Klassert goto out; 1986999aae1SSabrina Dubroca } 19907bf7908SSteffen Klassert 2001da177e4SLinus Torvalds break; 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds case AF_INET6: 203dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 2046999aae1SSabrina Dubroca if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) { 2056999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)"); 20607bf7908SSteffen Klassert goto out; 2076999aae1SSabrina Dubroca } 20807bf7908SSteffen Klassert 2091da177e4SLinus Torvalds break; 2101da177e4SLinus Torvalds #else 2116999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "IPv6 support disabled"); 2121da177e4SLinus Torvalds err = -EAFNOSUPPORT; 2131da177e4SLinus Torvalds goto out; 2141da177e4SLinus Torvalds #endif 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds default: 2176999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid address family in selector"); 2181da177e4SLinus Torvalds goto out; 2193ff50b79SStephen Hemminger } 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds err = -EINVAL; 2221da177e4SLinus Torvalds switch (p->id.proto) { 2231da177e4SLinus Torvalds case IPPROTO_AH: 2246999aae1SSabrina Dubroca if (!attrs[XFRMA_ALG_AUTH] && 2256999aae1SSabrina Dubroca !attrs[XFRMA_ALG_AUTH_TRUNC]) { 2266999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for AH: AUTH_TRUNC or AUTH"); 2276999aae1SSabrina Dubroca goto out; 2286999aae1SSabrina Dubroca } 2296999aae1SSabrina Dubroca 2306999aae1SSabrina Dubroca if (attrs[XFRMA_ALG_AEAD] || 23135a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 23235d2856bSMartin Willi attrs[XFRMA_ALG_COMP] || 2336999aae1SSabrina Dubroca attrs[XFRMA_TFCPAD]) { 2346999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attributes for AH: AEAD, CRYPT, COMP, TFCPAD"); 2351da177e4SLinus Torvalds goto out; 2366999aae1SSabrina Dubroca } 2371da177e4SLinus Torvalds break; 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds case IPPROTO_ESP: 2406999aae1SSabrina Dubroca if (attrs[XFRMA_ALG_COMP]) { 2416999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attribute for ESP: COMP"); 2421a6509d9SHerbert Xu goto out; 2436999aae1SSabrina Dubroca } 2446999aae1SSabrina Dubroca 2451a6509d9SHerbert Xu if (!attrs[XFRMA_ALG_AUTH] && 2464447bb33SMartin Willi !attrs[XFRMA_ALG_AUTH_TRUNC] && 2471a6509d9SHerbert Xu !attrs[XFRMA_ALG_CRYPT] && 2486999aae1SSabrina Dubroca !attrs[XFRMA_ALG_AEAD]) { 2496999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for ESP: at least one of AUTH, AUTH_TRUNC, CRYPT, AEAD"); 2501a6509d9SHerbert Xu goto out; 2516999aae1SSabrina Dubroca } 2526999aae1SSabrina Dubroca 2531a6509d9SHerbert Xu if ((attrs[XFRMA_ALG_AUTH] || 2544447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 2551a6509d9SHerbert Xu attrs[XFRMA_ALG_CRYPT]) && 2566999aae1SSabrina Dubroca attrs[XFRMA_ALG_AEAD]) { 2576999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attribute combination for ESP: AEAD can't be used with AUTH, AUTH_TRUNC, CRYPT"); 2581da177e4SLinus Torvalds goto out; 2596999aae1SSabrina Dubroca } 2606999aae1SSabrina Dubroca 26135d2856bSMartin Willi if (attrs[XFRMA_TFCPAD] && 2626999aae1SSabrina Dubroca p->mode != XFRM_MODE_TUNNEL) { 2636999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "TFC padding can only be used in tunnel mode"); 26435d2856bSMartin Willi goto out; 2656999aae1SSabrina Dubroca } 2661da177e4SLinus Torvalds break; 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds case IPPROTO_COMP: 2696999aae1SSabrina Dubroca if (!attrs[XFRMA_ALG_COMP]) { 2706999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for COMP: COMP"); 2716999aae1SSabrina Dubroca goto out; 2726999aae1SSabrina Dubroca } 2736999aae1SSabrina Dubroca 2746999aae1SSabrina Dubroca if (attrs[XFRMA_ALG_AEAD] || 27535a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 2764447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 27735d2856bSMartin Willi attrs[XFRMA_ALG_CRYPT] || 2786999aae1SSabrina Dubroca attrs[XFRMA_TFCPAD]) { 2796999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attributes for COMP: AEAD, AUTH, AUTH_TRUNC, CRYPT, TFCPAD"); 2801da177e4SLinus Torvalds goto out; 2816999aae1SSabrina Dubroca } 2826999aae1SSabrina Dubroca 2836999aae1SSabrina Dubroca if (ntohl(p->id.spi) >= 0x10000) { 2846999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "SPI is too large for COMP (must be < 0x10000)"); 2856999aae1SSabrina Dubroca goto out; 2866999aae1SSabrina Dubroca } 2871da177e4SLinus Torvalds break; 2881da177e4SLinus Torvalds 289dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 290e23c7194SMasahide NAKAMURA case IPPROTO_DSTOPTS: 291e23c7194SMasahide NAKAMURA case IPPROTO_ROUTING: 29235a7aa08SThomas Graf if (attrs[XFRMA_ALG_COMP] || 29335a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 2944447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 2951a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 29635a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 29735a7aa08SThomas Graf attrs[XFRMA_ENCAP] || 29835a7aa08SThomas Graf attrs[XFRMA_SEC_CTX] || 2996999aae1SSabrina Dubroca attrs[XFRMA_TFCPAD]) { 3006999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attributes for DSTOPTS/ROUTING"); 301e23c7194SMasahide NAKAMURA goto out; 3026999aae1SSabrina Dubroca } 3036999aae1SSabrina Dubroca 3046999aae1SSabrina Dubroca if (!attrs[XFRMA_COADDR]) { 3056999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required COADDR attribute for DSTOPTS/ROUTING"); 3066999aae1SSabrina Dubroca goto out; 3076999aae1SSabrina Dubroca } 308e23c7194SMasahide NAKAMURA break; 309e23c7194SMasahide NAKAMURA #endif 310e23c7194SMasahide NAKAMURA 3111da177e4SLinus Torvalds default: 3126999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Unsupported protocol"); 3131da177e4SLinus Torvalds goto out; 3143ff50b79SStephen Hemminger } 3151da177e4SLinus Torvalds 3161a6509d9SHerbert Xu if ((err = verify_aead(attrs))) 3171a6509d9SHerbert Xu goto out; 3184447bb33SMartin Willi if ((err = verify_auth_trunc(attrs))) 3194447bb33SMartin Willi goto out; 32035a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) 3211da177e4SLinus Torvalds goto out; 32235a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) 3231da177e4SLinus Torvalds goto out; 32435a7aa08SThomas Graf if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) 3251da177e4SLinus Torvalds goto out; 3266999aae1SSabrina Dubroca if ((err = verify_sec_ctx_len(attrs, extack))) 327df71837dSTrent Jaeger goto out; 328*785b87b2SSabrina Dubroca if ((err = verify_replay(p, attrs, extack))) 329d8647b79SSteffen Klassert goto out; 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds err = -EINVAL; 3321da177e4SLinus Torvalds switch (p->mode) { 3337e49e6deSMasahide NAKAMURA case XFRM_MODE_TRANSPORT: 3347e49e6deSMasahide NAKAMURA case XFRM_MODE_TUNNEL: 335060f02a3SNoriaki TAKAMIYA case XFRM_MODE_ROUTEOPTIMIZATION: 3360a69452cSDiego Beltrami case XFRM_MODE_BEET: 3371da177e4SLinus Torvalds break; 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds default: 3406999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Unsupported mode"); 3411da177e4SLinus Torvalds goto out; 3423ff50b79SStephen Hemminger } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds err = 0; 3451da177e4SLinus Torvalds 3466999aae1SSabrina Dubroca if (attrs[XFRMA_MTIMER_THRESH]) { 3476999aae1SSabrina Dubroca if (!attrs[XFRMA_ENCAP]) { 3486999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "MTIMER_THRESH attribute can only be set on ENCAP states"); 3494e484b3eSAntony Antony err = -EINVAL; 3506999aae1SSabrina Dubroca goto out; 3516999aae1SSabrina Dubroca } 3526999aae1SSabrina Dubroca } 3534e484b3eSAntony Antony 3541da177e4SLinus Torvalds out: 3551da177e4SLinus Torvalds return err; 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, 3596f2f19edSDavid S. Miller struct xfrm_algo_desc *(*get_byname)(const char *, int), 3605424f32eSThomas Graf struct nlattr *rta) 3611da177e4SLinus Torvalds { 3621da177e4SLinus Torvalds struct xfrm_algo *p, *ualg; 3631da177e4SLinus Torvalds struct xfrm_algo_desc *algo; 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds if (!rta) 3661da177e4SLinus Torvalds return 0; 3671da177e4SLinus Torvalds 3685424f32eSThomas Graf ualg = nla_data(rta); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds algo = get_byname(ualg->alg_name, 1); 3711da177e4SLinus Torvalds if (!algo) 3721da177e4SLinus Torvalds return -ENOSYS; 3731da177e4SLinus Torvalds *props = algo->desc.sadb_alg_id; 3741da177e4SLinus Torvalds 3750f99be0dSEric Dumazet p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 3761da177e4SLinus Torvalds if (!p) 3771da177e4SLinus Torvalds return -ENOMEM; 3781da177e4SLinus Torvalds 37904ff1260SHerbert Xu strcpy(p->alg_name, algo->name); 3801da177e4SLinus Torvalds *algpp = p; 3811da177e4SLinus Torvalds return 0; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds 38469b0137fSHerbert Xu static int attach_crypt(struct xfrm_state *x, struct nlattr *rta) 38569b0137fSHerbert Xu { 38669b0137fSHerbert Xu struct xfrm_algo *p, *ualg; 38769b0137fSHerbert Xu struct xfrm_algo_desc *algo; 38869b0137fSHerbert Xu 38969b0137fSHerbert Xu if (!rta) 39069b0137fSHerbert Xu return 0; 39169b0137fSHerbert Xu 39269b0137fSHerbert Xu ualg = nla_data(rta); 39369b0137fSHerbert Xu 39469b0137fSHerbert Xu algo = xfrm_ealg_get_byname(ualg->alg_name, 1); 39569b0137fSHerbert Xu if (!algo) 39669b0137fSHerbert Xu return -ENOSYS; 39769b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 39869b0137fSHerbert Xu 39969b0137fSHerbert Xu p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 40069b0137fSHerbert Xu if (!p) 40169b0137fSHerbert Xu return -ENOMEM; 40269b0137fSHerbert Xu 40369b0137fSHerbert Xu strcpy(p->alg_name, algo->name); 40469b0137fSHerbert Xu x->ealg = p; 40569b0137fSHerbert Xu x->geniv = algo->uinfo.encr.geniv; 40669b0137fSHerbert Xu return 0; 40769b0137fSHerbert Xu } 40869b0137fSHerbert Xu 4094447bb33SMartin Willi static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, 4104447bb33SMartin Willi struct nlattr *rta) 4114447bb33SMartin Willi { 4124447bb33SMartin Willi struct xfrm_algo *ualg; 4134447bb33SMartin Willi struct xfrm_algo_auth *p; 4144447bb33SMartin Willi struct xfrm_algo_desc *algo; 4154447bb33SMartin Willi 4164447bb33SMartin Willi if (!rta) 4174447bb33SMartin Willi return 0; 4184447bb33SMartin Willi 4194447bb33SMartin Willi ualg = nla_data(rta); 4204447bb33SMartin Willi 4214447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 4224447bb33SMartin Willi if (!algo) 4234447bb33SMartin Willi return -ENOSYS; 4244447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 4254447bb33SMartin Willi 4264447bb33SMartin Willi p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); 4274447bb33SMartin Willi if (!p) 4284447bb33SMartin Willi return -ENOMEM; 4294447bb33SMartin Willi 4304447bb33SMartin Willi strcpy(p->alg_name, algo->name); 4314447bb33SMartin Willi p->alg_key_len = ualg->alg_key_len; 4324447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 4334447bb33SMartin Willi memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); 4344447bb33SMartin Willi 4354447bb33SMartin Willi *algpp = p; 4364447bb33SMartin Willi return 0; 4374447bb33SMartin Willi } 4384447bb33SMartin Willi 4394447bb33SMartin Willi static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, 4404447bb33SMartin Willi struct nlattr *rta) 4414447bb33SMartin Willi { 4424447bb33SMartin Willi struct xfrm_algo_auth *p, *ualg; 4434447bb33SMartin Willi struct xfrm_algo_desc *algo; 4444447bb33SMartin Willi 4454447bb33SMartin Willi if (!rta) 4464447bb33SMartin Willi return 0; 4474447bb33SMartin Willi 4484447bb33SMartin Willi ualg = nla_data(rta); 4494447bb33SMartin Willi 4504447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 4514447bb33SMartin Willi if (!algo) 4524447bb33SMartin Willi return -ENOSYS; 453689f1c9dSHerbert Xu if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) 4544447bb33SMartin Willi return -EINVAL; 4554447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 4564447bb33SMartin Willi 4574447bb33SMartin Willi p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); 4584447bb33SMartin Willi if (!p) 4594447bb33SMartin Willi return -ENOMEM; 4604447bb33SMartin Willi 4614447bb33SMartin Willi strcpy(p->alg_name, algo->name); 4624447bb33SMartin Willi if (!p->alg_trunc_len) 4634447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 4644447bb33SMartin Willi 4654447bb33SMartin Willi *algpp = p; 4664447bb33SMartin Willi return 0; 4674447bb33SMartin Willi } 4684447bb33SMartin Willi 46969b0137fSHerbert Xu static int attach_aead(struct xfrm_state *x, struct nlattr *rta) 4701a6509d9SHerbert Xu { 4711a6509d9SHerbert Xu struct xfrm_algo_aead *p, *ualg; 4721a6509d9SHerbert Xu struct xfrm_algo_desc *algo; 4731a6509d9SHerbert Xu 4741a6509d9SHerbert Xu if (!rta) 4751a6509d9SHerbert Xu return 0; 4761a6509d9SHerbert Xu 4771a6509d9SHerbert Xu ualg = nla_data(rta); 4781a6509d9SHerbert Xu 4791a6509d9SHerbert Xu algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); 4801a6509d9SHerbert Xu if (!algo) 4811a6509d9SHerbert Xu return -ENOSYS; 48269b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 4831a6509d9SHerbert Xu 4841a6509d9SHerbert Xu p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); 4851a6509d9SHerbert Xu if (!p) 4861a6509d9SHerbert Xu return -ENOMEM; 4871a6509d9SHerbert Xu 4881a6509d9SHerbert Xu strcpy(p->alg_name, algo->name); 48969b0137fSHerbert Xu x->aead = p; 49069b0137fSHerbert Xu x->geniv = algo->uinfo.aead.geniv; 4911a6509d9SHerbert Xu return 0; 4921a6509d9SHerbert Xu } 4931a6509d9SHerbert Xu 494e2b19125SSteffen Klassert static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, 495e2b19125SSteffen Klassert struct nlattr *rp) 496e2b19125SSteffen Klassert { 497e2b19125SSteffen Klassert struct xfrm_replay_state_esn *up; 4985e708e47SAlexey Dobriyan unsigned int ulen; 499e2b19125SSteffen Klassert 500e2b19125SSteffen Klassert if (!replay_esn || !rp) 501e2b19125SSteffen Klassert return 0; 502e2b19125SSteffen Klassert 503e2b19125SSteffen Klassert up = nla_data(rp); 504ecd79187SMathias Krause ulen = xfrm_replay_state_esn_len(up); 505e2b19125SSteffen Klassert 506f843ee6dSAndy Whitcroft /* Check the overall length and the internal bitmap length to avoid 507f843ee6dSAndy Whitcroft * potential overflow. */ 5085e708e47SAlexey Dobriyan if (nla_len(rp) < (int)ulen || 509f843ee6dSAndy Whitcroft xfrm_replay_state_esn_len(replay_esn) != ulen || 510f843ee6dSAndy Whitcroft replay_esn->bmp_len != up->bmp_len) 511e2b19125SSteffen Klassert return -EINVAL; 512e2b19125SSteffen Klassert 513677e806dSAndy Whitcroft if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) 514677e806dSAndy Whitcroft return -EINVAL; 515677e806dSAndy Whitcroft 516e2b19125SSteffen Klassert return 0; 517e2b19125SSteffen Klassert } 518e2b19125SSteffen Klassert 519d8647b79SSteffen Klassert static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, 520d8647b79SSteffen Klassert struct xfrm_replay_state_esn **preplay_esn, 521d8647b79SSteffen Klassert struct nlattr *rta) 522d8647b79SSteffen Klassert { 523d8647b79SSteffen Klassert struct xfrm_replay_state_esn *p, *pp, *up; 5245e708e47SAlexey Dobriyan unsigned int klen, ulen; 525d8647b79SSteffen Klassert 526d8647b79SSteffen Klassert if (!rta) 527d8647b79SSteffen Klassert return 0; 528d8647b79SSteffen Klassert 529d8647b79SSteffen Klassert up = nla_data(rta); 530ecd79187SMathias Krause klen = xfrm_replay_state_esn_len(up); 5315e708e47SAlexey Dobriyan ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up); 532d8647b79SSteffen Klassert 533ecd79187SMathias Krause p = kzalloc(klen, GFP_KERNEL); 534d8647b79SSteffen Klassert if (!p) 535d8647b79SSteffen Klassert return -ENOMEM; 536d8647b79SSteffen Klassert 537ecd79187SMathias Krause pp = kzalloc(klen, GFP_KERNEL); 538d8647b79SSteffen Klassert if (!pp) { 539d8647b79SSteffen Klassert kfree(p); 540d8647b79SSteffen Klassert return -ENOMEM; 541d8647b79SSteffen Klassert } 542d8647b79SSteffen Klassert 543ecd79187SMathias Krause memcpy(p, up, ulen); 544ecd79187SMathias Krause memcpy(pp, up, ulen); 545ecd79187SMathias Krause 546d8647b79SSteffen Klassert *replay_esn = p; 547d8647b79SSteffen Klassert *preplay_esn = pp; 548d8647b79SSteffen Klassert 549d8647b79SSteffen Klassert return 0; 550d8647b79SSteffen Klassert } 551d8647b79SSteffen Klassert 552a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) 553df71837dSTrent Jaeger { 554a1b831f2SAlexey Dobriyan unsigned int len = 0; 555df71837dSTrent Jaeger 556df71837dSTrent Jaeger if (xfrm_ctx) { 557df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 558df71837dSTrent Jaeger len += xfrm_ctx->ctx_len; 559df71837dSTrent Jaeger } 560df71837dSTrent Jaeger return len; 561df71837dSTrent Jaeger } 562df71837dSTrent Jaeger 5631da177e4SLinus Torvalds static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 5641da177e4SLinus Torvalds { 5651da177e4SLinus Torvalds memcpy(&x->id, &p->id, sizeof(x->id)); 5661da177e4SLinus Torvalds memcpy(&x->sel, &p->sel, sizeof(x->sel)); 5671da177e4SLinus Torvalds memcpy(&x->lft, &p->lft, sizeof(x->lft)); 5681da177e4SLinus Torvalds x->props.mode = p->mode; 56933fce60dSFan Du x->props.replay_window = min_t(unsigned int, p->replay_window, 57033fce60dSFan Du sizeof(x->replay.bitmap) * 8); 5711da177e4SLinus Torvalds x->props.reqid = p->reqid; 5721da177e4SLinus Torvalds x->props.family = p->family; 57354489c14SDavid S. Miller memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); 5741da177e4SLinus Torvalds x->props.flags = p->flags; 575196b0036SHerbert Xu 576ccf9b3b8SSteffen Klassert if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) 577196b0036SHerbert Xu x->sel.family = p->family; 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds 580d51d081dSJamal Hadi Salim /* 581d51d081dSJamal Hadi Salim * someday when pfkey also has support, we could have the code 582d51d081dSJamal Hadi Salim * somehow made shareable and move it to xfrm_state.c - JHS 583d51d081dSJamal Hadi Salim * 584d51d081dSJamal Hadi Salim */ 585e3ac104dSMathias Krause static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, 586e3ac104dSMathias Krause int update_esn) 587d51d081dSJamal Hadi Salim { 5885424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 589e3ac104dSMathias Krause struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; 5905424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 5915424f32eSThomas Graf struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 5925424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 5934e484b3eSAntony Antony struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH]; 594d51d081dSJamal Hadi Salim 595d8647b79SSteffen Klassert if (re) { 596d8647b79SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 597d8647b79SSteffen Klassert replay_esn = nla_data(re); 598d8647b79SSteffen Klassert memcpy(x->replay_esn, replay_esn, 599d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 600d8647b79SSteffen Klassert memcpy(x->preplay_esn, replay_esn, 601d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 602d8647b79SSteffen Klassert } 603d8647b79SSteffen Klassert 604d51d081dSJamal Hadi Salim if (rp) { 605d51d081dSJamal Hadi Salim struct xfrm_replay_state *replay; 6065424f32eSThomas Graf replay = nla_data(rp); 607d51d081dSJamal Hadi Salim memcpy(&x->replay, replay, sizeof(*replay)); 608d51d081dSJamal Hadi Salim memcpy(&x->preplay, replay, sizeof(*replay)); 609d51d081dSJamal Hadi Salim } 610d51d081dSJamal Hadi Salim 611d51d081dSJamal Hadi Salim if (lt) { 612d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur *ltime; 6135424f32eSThomas Graf ltime = nla_data(lt); 614d51d081dSJamal Hadi Salim x->curlft.bytes = ltime->bytes; 615d51d081dSJamal Hadi Salim x->curlft.packets = ltime->packets; 616d51d081dSJamal Hadi Salim x->curlft.add_time = ltime->add_time; 617d51d081dSJamal Hadi Salim x->curlft.use_time = ltime->use_time; 618d51d081dSJamal Hadi Salim } 619d51d081dSJamal Hadi Salim 620cf5cb79fSThomas Graf if (et) 6215424f32eSThomas Graf x->replay_maxage = nla_get_u32(et); 622d51d081dSJamal Hadi Salim 623cf5cb79fSThomas Graf if (rt) 6245424f32eSThomas Graf x->replay_maxdiff = nla_get_u32(rt); 6254e484b3eSAntony Antony 6264e484b3eSAntony Antony if (mt) 6274e484b3eSAntony Antony x->mapping_maxage = nla_get_u32(mt); 628d51d081dSJamal Hadi Salim } 629d51d081dSJamal Hadi Salim 6309b42c1f1SSteffen Klassert static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m) 6319b42c1f1SSteffen Klassert { 6329b42c1f1SSteffen Klassert if (attrs[XFRMA_SET_MARK]) { 6339b42c1f1SSteffen Klassert m->v = nla_get_u32(attrs[XFRMA_SET_MARK]); 6349b42c1f1SSteffen Klassert if (attrs[XFRMA_SET_MARK_MASK]) 6359b42c1f1SSteffen Klassert m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]); 6369b42c1f1SSteffen Klassert else 6379b42c1f1SSteffen Klassert m->m = 0xffffffff; 6389b42c1f1SSteffen Klassert } else { 6399b42c1f1SSteffen Klassert m->v = m->m = 0; 6409b42c1f1SSteffen Klassert } 6419b42c1f1SSteffen Klassert } 6429b42c1f1SSteffen Klassert 643fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_state_construct(struct net *net, 644fc34acd3SAlexey Dobriyan struct xfrm_usersa_info *p, 6455424f32eSThomas Graf struct nlattr **attrs, 6461da177e4SLinus Torvalds int *errp) 6471da177e4SLinus Torvalds { 648fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 6491da177e4SLinus Torvalds int err = -ENOMEM; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds if (!x) 6521da177e4SLinus Torvalds goto error_no_put; 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds copy_from_user_state(x, p); 6551da177e4SLinus Torvalds 6566fd06963SSteffen Klassert if (attrs[XFRMA_ENCAP]) { 6576fd06963SSteffen Klassert x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 6586fd06963SSteffen Klassert sizeof(*x->encap), GFP_KERNEL); 6596fd06963SSteffen Klassert if (x->encap == NULL) 6606fd06963SSteffen Klassert goto error; 6616fd06963SSteffen Klassert } 6626fd06963SSteffen Klassert 6636fd06963SSteffen Klassert if (attrs[XFRMA_COADDR]) { 6646fd06963SSteffen Klassert x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), 6656fd06963SSteffen Klassert sizeof(*x->coaddr), GFP_KERNEL); 6666fd06963SSteffen Klassert if (x->coaddr == NULL) 6676fd06963SSteffen Klassert goto error; 6686fd06963SSteffen Klassert } 6696fd06963SSteffen Klassert 670a947b0a9SNicolas Dichtel if (attrs[XFRMA_SA_EXTRA_FLAGS]) 671a947b0a9SNicolas Dichtel x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); 672a947b0a9SNicolas Dichtel 67369b0137fSHerbert Xu if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD]))) 6741a6509d9SHerbert Xu goto error; 6754447bb33SMartin Willi if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, 6764447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC]))) 6774447bb33SMartin Willi goto error; 6784447bb33SMartin Willi if (!x->props.aalgo) { 6794447bb33SMartin Willi if ((err = attach_auth(&x->aalg, &x->props.aalgo, 68035a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH]))) 6811da177e4SLinus Torvalds goto error; 6824447bb33SMartin Willi } 68369b0137fSHerbert Xu if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT]))) 6841da177e4SLinus Torvalds goto error; 6851da177e4SLinus Torvalds if ((err = attach_one_algo(&x->calg, &x->props.calgo, 6861da177e4SLinus Torvalds xfrm_calg_get_byname, 68735a7aa08SThomas Graf attrs[XFRMA_ALG_COMP]))) 6881da177e4SLinus Torvalds goto error; 689fd21150aSThomas Graf 69035d2856bSMartin Willi if (attrs[XFRMA_TFCPAD]) 69135d2856bSMartin Willi x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); 69235d2856bSMartin Willi 6936f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &x->mark); 6946f26b61eSJamal Hadi Salim 6959b42c1f1SSteffen Klassert xfrm_smark_init(attrs, &x->props.smark); 696077fbac4SLorenzo Colitti 697a3d9001bSKai Lueke if (attrs[XFRMA_IF_ID]) 6987e652640SSteffen Klassert x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 699fd21150aSThomas Graf 700ffdb5211SIlan Tayari err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]); 7011da177e4SLinus Torvalds if (err) 7021da177e4SLinus Torvalds goto error; 7031da177e4SLinus Torvalds 7042f30ea50SMathias Krause if (attrs[XFRMA_SEC_CTX]) { 7052f30ea50SMathias Krause err = security_xfrm_state_alloc(x, 7062f30ea50SMathias Krause nla_data(attrs[XFRMA_SEC_CTX])); 7072f30ea50SMathias Krause if (err) 708df71837dSTrent Jaeger goto error; 7092f30ea50SMathias Krause } 710df71837dSTrent Jaeger 711d8647b79SSteffen Klassert if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, 712d8647b79SSteffen Klassert attrs[XFRMA_REPLAY_ESN_VAL]))) 713d8647b79SSteffen Klassert goto error; 714d8647b79SSteffen Klassert 7151da177e4SLinus Torvalds x->km.seq = p->seq; 716b27aeadbSAlexey Dobriyan x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; 717d51d081dSJamal Hadi Salim /* sysctl_xfrm_aevent_etime is in 100ms units */ 718b27aeadbSAlexey Dobriyan x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; 719d51d081dSJamal Hadi Salim 7209fdc4883SSteffen Klassert if ((err = xfrm_init_replay(x))) 7219fdc4883SSteffen Klassert goto error; 722d51d081dSJamal Hadi Salim 7239fdc4883SSteffen Klassert /* override default values from above */ 724e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 0); 7251da177e4SLinus Torvalds 726cc01572eSYossi Kuperman /* configure the hardware if offload is requested */ 727cc01572eSYossi Kuperman if (attrs[XFRMA_OFFLOAD_DEV]) { 728cc01572eSYossi Kuperman err = xfrm_dev_state_add(net, x, 729cc01572eSYossi Kuperman nla_data(attrs[XFRMA_OFFLOAD_DEV])); 730cc01572eSYossi Kuperman if (err) 731cc01572eSYossi Kuperman goto error; 732cc01572eSYossi Kuperman } 733cc01572eSYossi Kuperman 7341da177e4SLinus Torvalds return x; 7351da177e4SLinus Torvalds 7361da177e4SLinus Torvalds error: 7371da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 7381da177e4SLinus Torvalds xfrm_state_put(x); 7391da177e4SLinus Torvalds error_no_put: 7401da177e4SLinus Torvalds *errp = err; 7411da177e4SLinus Torvalds return NULL; 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds 74422e70050SChristoph Hellwig static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 7453bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 7461da177e4SLinus Torvalds { 747fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 7487b67c857SThomas Graf struct xfrm_usersa_info *p = nlmsg_data(nlh); 7491da177e4SLinus Torvalds struct xfrm_state *x; 7501da177e4SLinus Torvalds int err; 75126b15dadSJamal Hadi Salim struct km_event c; 7521da177e4SLinus Torvalds 7536999aae1SSabrina Dubroca err = verify_newsa_info(p, attrs, extack); 7541da177e4SLinus Torvalds if (err) 7551da177e4SLinus Torvalds return err; 7561da177e4SLinus Torvalds 757fc34acd3SAlexey Dobriyan x = xfrm_state_construct(net, p, attrs, &err); 7581da177e4SLinus Torvalds if (!x) 7591da177e4SLinus Torvalds return err; 7601da177e4SLinus Torvalds 76126b15dadSJamal Hadi Salim xfrm_state_hold(x); 7621da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 7631da177e4SLinus Torvalds err = xfrm_state_add(x); 7641da177e4SLinus Torvalds else 7651da177e4SLinus Torvalds err = xfrm_state_update(x); 7661da177e4SLinus Torvalds 7672e71029eSTetsuo Handa xfrm_audit_state_add(x, err ? 0 : 1, true); 768161a09e7SJoy Latten 7691da177e4SLinus Torvalds if (err < 0) { 7701da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 771c5d4d7d8SSteffen Klassert xfrm_dev_state_delete(x); 77221380b81SHerbert Xu __xfrm_state_put(x); 7737d6dfe1fSPatrick McHardy goto out; 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds 776cc01572eSYossi Kuperman if (x->km.state == XFRM_STATE_VOID) 777cc01572eSYossi Kuperman x->km.state = XFRM_STATE_VALID; 778cc01572eSYossi Kuperman 77926b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 78015e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 781f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 78226b15dadSJamal Hadi Salim 78326b15dadSJamal Hadi Salim km_state_notify(x, &c); 7847d6dfe1fSPatrick McHardy out: 78526b15dadSJamal Hadi Salim xfrm_state_put(x); 7861da177e4SLinus Torvalds return err; 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 789fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_user_state_lookup(struct net *net, 790fc34acd3SAlexey Dobriyan struct xfrm_usersa_id *p, 7915424f32eSThomas Graf struct nlattr **attrs, 792eb2971b6SMasahide NAKAMURA int *errp) 793eb2971b6SMasahide NAKAMURA { 794eb2971b6SMasahide NAKAMURA struct xfrm_state *x = NULL; 7956f26b61eSJamal Hadi Salim struct xfrm_mark m; 796eb2971b6SMasahide NAKAMURA int err; 7976f26b61eSJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 798eb2971b6SMasahide NAKAMURA 799eb2971b6SMasahide NAKAMURA if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { 800eb2971b6SMasahide NAKAMURA err = -ESRCH; 8016f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); 802eb2971b6SMasahide NAKAMURA } else { 803eb2971b6SMasahide NAKAMURA xfrm_address_t *saddr = NULL; 804eb2971b6SMasahide NAKAMURA 80535a7aa08SThomas Graf verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); 806eb2971b6SMasahide NAKAMURA if (!saddr) { 807eb2971b6SMasahide NAKAMURA err = -EINVAL; 808eb2971b6SMasahide NAKAMURA goto out; 809eb2971b6SMasahide NAKAMURA } 810eb2971b6SMasahide NAKAMURA 8119abbffeeSMasahide NAKAMURA err = -ESRCH; 8126f26b61eSJamal Hadi Salim x = xfrm_state_lookup_byaddr(net, mark, 8136f26b61eSJamal Hadi Salim &p->daddr, saddr, 814221df1edSAlexey Dobriyan p->proto, p->family); 815eb2971b6SMasahide NAKAMURA } 816eb2971b6SMasahide NAKAMURA 817eb2971b6SMasahide NAKAMURA out: 818eb2971b6SMasahide NAKAMURA if (!x && errp) 819eb2971b6SMasahide NAKAMURA *errp = err; 820eb2971b6SMasahide NAKAMURA return x; 821eb2971b6SMasahide NAKAMURA } 822eb2971b6SMasahide NAKAMURA 82322e70050SChristoph Hellwig static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 8243bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 8251da177e4SLinus Torvalds { 826fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 8271da177e4SLinus Torvalds struct xfrm_state *x; 828eb2971b6SMasahide NAKAMURA int err = -ESRCH; 82926b15dadSJamal Hadi Salim struct km_event c; 8307b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 8311da177e4SLinus Torvalds 832fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 8331da177e4SLinus Torvalds if (x == NULL) 834eb2971b6SMasahide NAKAMURA return err; 8351da177e4SLinus Torvalds 8366f68dc37SDavid S. Miller if ((err = security_xfrm_state_delete(x)) != 0) 837c8c05a8eSCatherine Zhang goto out; 838c8c05a8eSCatherine Zhang 8391da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 840c8c05a8eSCatherine Zhang err = -EPERM; 841c8c05a8eSCatherine Zhang goto out; 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds 84426b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 845161a09e7SJoy Latten 846c8c05a8eSCatherine Zhang if (err < 0) 847c8c05a8eSCatherine Zhang goto out; 84826b15dadSJamal Hadi Salim 84926b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 85015e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 851f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 85226b15dadSJamal Hadi Salim km_state_notify(x, &c); 8531da177e4SLinus Torvalds 854c8c05a8eSCatherine Zhang out: 8552e71029eSTetsuo Handa xfrm_audit_state_delete(x, err ? 0 : 1, true); 856c8c05a8eSCatherine Zhang xfrm_state_put(x); 85726b15dadSJamal Hadi Salim return err; 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 8611da177e4SLinus Torvalds { 862f778a636SMathias Krause memset(p, 0, sizeof(*p)); 8631da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 8641da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 8651da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 8661da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 867e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay_window, &p->stats.replay_window); 868e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay, &p->stats.replay); 869e33d4f13SSowmini Varadhan put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed); 87054489c14SDavid S. Miller memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); 8711da177e4SLinus Torvalds p->mode = x->props.mode; 8721da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 8731da177e4SLinus Torvalds p->reqid = x->props.reqid; 8741da177e4SLinus Torvalds p->family = x->props.family; 8751da177e4SLinus Torvalds p->flags = x->props.flags; 8761da177e4SLinus Torvalds p->seq = x->km.seq; 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds struct xfrm_dump_info { 8801da177e4SLinus Torvalds struct sk_buff *in_skb; 8811da177e4SLinus Torvalds struct sk_buff *out_skb; 8821da177e4SLinus Torvalds u32 nlmsg_seq; 8831da177e4SLinus Torvalds u16 nlmsg_flags; 8841da177e4SLinus Torvalds }; 8851da177e4SLinus Torvalds 886c0144beaSThomas Graf static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) 887c0144beaSThomas Graf { 888c0144beaSThomas Graf struct xfrm_user_sec_ctx *uctx; 889c0144beaSThomas Graf struct nlattr *attr; 89068325d3bSHerbert Xu int ctx_size = sizeof(*uctx) + s->ctx_len; 891c0144beaSThomas Graf 892c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); 893c0144beaSThomas Graf if (attr == NULL) 894c0144beaSThomas Graf return -EMSGSIZE; 895c0144beaSThomas Graf 896c0144beaSThomas Graf uctx = nla_data(attr); 897c0144beaSThomas Graf uctx->exttype = XFRMA_SEC_CTX; 898c0144beaSThomas Graf uctx->len = ctx_size; 899c0144beaSThomas Graf uctx->ctx_doi = s->ctx_doi; 900c0144beaSThomas Graf uctx->ctx_alg = s->ctx_alg; 901c0144beaSThomas Graf uctx->ctx_len = s->ctx_len; 902c0144beaSThomas Graf memcpy(uctx + 1, s->ctx_str, s->ctx_len); 903c0144beaSThomas Graf 904c0144beaSThomas Graf return 0; 905c0144beaSThomas Graf } 906c0144beaSThomas Graf 90787e0a94eSLeon Romanovsky static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb) 908d77e38e6SSteffen Klassert { 909d77e38e6SSteffen Klassert struct xfrm_user_offload *xuo; 910d77e38e6SSteffen Klassert struct nlattr *attr; 911d77e38e6SSteffen Klassert 912d77e38e6SSteffen Klassert attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo)); 913d77e38e6SSteffen Klassert if (attr == NULL) 914d77e38e6SSteffen Klassert return -EMSGSIZE; 915d77e38e6SSteffen Klassert 916d77e38e6SSteffen Klassert xuo = nla_data(attr); 9175fe0d4bdSMathias Krause memset(xuo, 0, sizeof(*xuo)); 918d77e38e6SSteffen Klassert xuo->ifindex = xso->dev->ifindex; 919482db2f1SLeon Romanovsky if (xso->dir == XFRM_DEV_OFFLOAD_IN) 920482db2f1SLeon Romanovsky xuo->flags = XFRM_OFFLOAD_INBOUND; 921d77e38e6SSteffen Klassert 922d77e38e6SSteffen Klassert return 0; 923d77e38e6SSteffen Klassert } 924d77e38e6SSteffen Klassert 925c7a5899eSAntony Antony static bool xfrm_redact(void) 926c7a5899eSAntony Antony { 927c7a5899eSAntony Antony return IS_ENABLED(CONFIG_SECURITY) && 928c7a5899eSAntony Antony security_locked_down(LOCKDOWN_XFRM_SECRET); 929c7a5899eSAntony Antony } 930c7a5899eSAntony Antony 9314447bb33SMartin Willi static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) 9324447bb33SMartin Willi { 9334447bb33SMartin Willi struct xfrm_algo *algo; 934c7a5899eSAntony Antony struct xfrm_algo_auth *ap; 9354447bb33SMartin Willi struct nlattr *nla; 936c7a5899eSAntony Antony bool redact_secret = xfrm_redact(); 9374447bb33SMartin Willi 9384447bb33SMartin Willi nla = nla_reserve(skb, XFRMA_ALG_AUTH, 9394447bb33SMartin Willi sizeof(*algo) + (auth->alg_key_len + 7) / 8); 9404447bb33SMartin Willi if (!nla) 9414447bb33SMartin Willi return -EMSGSIZE; 9424447bb33SMartin Willi algo = nla_data(nla); 9434c87308bSMathias Krause strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); 944c7a5899eSAntony Antony 945c7a5899eSAntony Antony if (redact_secret && auth->alg_key_len) 946c7a5899eSAntony Antony memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8); 947c7a5899eSAntony Antony else 948c7a5899eSAntony Antony memcpy(algo->alg_key, auth->alg_key, 949c7a5899eSAntony Antony (auth->alg_key_len + 7) / 8); 9504447bb33SMartin Willi algo->alg_key_len = auth->alg_key_len; 9514447bb33SMartin Willi 952c7a5899eSAntony Antony nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth)); 953c7a5899eSAntony Antony if (!nla) 954c7a5899eSAntony Antony return -EMSGSIZE; 955c7a5899eSAntony Antony ap = nla_data(nla); 956c7a5899eSAntony Antony memcpy(ap, auth, sizeof(struct xfrm_algo_auth)); 957c7a5899eSAntony Antony if (redact_secret && auth->alg_key_len) 958c7a5899eSAntony Antony memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8); 959c7a5899eSAntony Antony else 960c7a5899eSAntony Antony memcpy(ap->alg_key, auth->alg_key, 961c7a5899eSAntony Antony (auth->alg_key_len + 7) / 8); 962c7a5899eSAntony Antony return 0; 963c7a5899eSAntony Antony } 964c7a5899eSAntony Antony 965c7a5899eSAntony Antony static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb) 966c7a5899eSAntony Antony { 967c7a5899eSAntony Antony struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead)); 968c7a5899eSAntony Antony struct xfrm_algo_aead *ap; 969c7a5899eSAntony Antony bool redact_secret = xfrm_redact(); 970c7a5899eSAntony Antony 971c7a5899eSAntony Antony if (!nla) 972c7a5899eSAntony Antony return -EMSGSIZE; 973c7a5899eSAntony Antony 974c7a5899eSAntony Antony ap = nla_data(nla); 975c7a5899eSAntony Antony memcpy(ap, aead, sizeof(*aead)); 976c7a5899eSAntony Antony 977c7a5899eSAntony Antony if (redact_secret && aead->alg_key_len) 978c7a5899eSAntony Antony memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8); 979c7a5899eSAntony Antony else 980c7a5899eSAntony Antony memcpy(ap->alg_key, aead->alg_key, 981c7a5899eSAntony Antony (aead->alg_key_len + 7) / 8); 982c7a5899eSAntony Antony return 0; 983c7a5899eSAntony Antony } 984c7a5899eSAntony Antony 985c7a5899eSAntony Antony static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb) 986c7a5899eSAntony Antony { 987c7a5899eSAntony Antony struct xfrm_algo *ap; 988c7a5899eSAntony Antony bool redact_secret = xfrm_redact(); 989c7a5899eSAntony Antony struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT, 990c7a5899eSAntony Antony xfrm_alg_len(ealg)); 991c7a5899eSAntony Antony if (!nla) 992c7a5899eSAntony Antony return -EMSGSIZE; 993c7a5899eSAntony Antony 994c7a5899eSAntony Antony ap = nla_data(nla); 995c7a5899eSAntony Antony memcpy(ap, ealg, sizeof(*ealg)); 996c7a5899eSAntony Antony 997c7a5899eSAntony Antony if (redact_secret && ealg->alg_key_len) 998c7a5899eSAntony Antony memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8); 999c7a5899eSAntony Antony else 1000c7a5899eSAntony Antony memcpy(ap->alg_key, ealg->alg_key, 1001c7a5899eSAntony Antony (ealg->alg_key_len + 7) / 8); 1002c7a5899eSAntony Antony 10034447bb33SMartin Willi return 0; 10044447bb33SMartin Willi } 10054447bb33SMartin Willi 10069b42c1f1SSteffen Klassert static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m) 10079b42c1f1SSteffen Klassert { 10089b42c1f1SSteffen Klassert int ret = 0; 10099b42c1f1SSteffen Klassert 10109b42c1f1SSteffen Klassert if (m->v | m->m) { 10119b42c1f1SSteffen Klassert ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v); 10129b42c1f1SSteffen Klassert if (!ret) 10139b42c1f1SSteffen Klassert ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m); 10149b42c1f1SSteffen Klassert } 10159b42c1f1SSteffen Klassert return ret; 10169b42c1f1SSteffen Klassert } 10179b42c1f1SSteffen Klassert 101868325d3bSHerbert Xu /* Don't change this without updating xfrm_sa_len! */ 101968325d3bSHerbert Xu static int copy_to_user_state_extra(struct xfrm_state *x, 102068325d3bSHerbert Xu struct xfrm_usersa_info *p, 102168325d3bSHerbert Xu struct sk_buff *skb) 10221da177e4SLinus Torvalds { 10231d1e34ddSDavid S. Miller int ret = 0; 10241d1e34ddSDavid S. Miller 10251da177e4SLinus Torvalds copy_to_user_state(x, p); 10261da177e4SLinus Torvalds 1027a947b0a9SNicolas Dichtel if (x->props.extra_flags) { 1028a947b0a9SNicolas Dichtel ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, 1029a947b0a9SNicolas Dichtel x->props.extra_flags); 1030a947b0a9SNicolas Dichtel if (ret) 1031a947b0a9SNicolas Dichtel goto out; 1032a947b0a9SNicolas Dichtel } 1033a947b0a9SNicolas Dichtel 10341d1e34ddSDavid S. Miller if (x->coaddr) { 10351d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); 10361d1e34ddSDavid S. Miller if (ret) 10371d1e34ddSDavid S. Miller goto out; 10381d1e34ddSDavid S. Miller } 10391d1e34ddSDavid S. Miller if (x->lastused) { 1040de95c4a4SNicolas Dichtel ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused, 1041de95c4a4SNicolas Dichtel XFRMA_PAD); 10421d1e34ddSDavid S. Miller if (ret) 10431d1e34ddSDavid S. Miller goto out; 10441d1e34ddSDavid S. Miller } 10451d1e34ddSDavid S. Miller if (x->aead) { 1046c7a5899eSAntony Antony ret = copy_to_user_aead(x->aead, skb); 10471d1e34ddSDavid S. Miller if (ret) 10481d1e34ddSDavid S. Miller goto out; 10491d1e34ddSDavid S. Miller } 10501d1e34ddSDavid S. Miller if (x->aalg) { 10511d1e34ddSDavid S. Miller ret = copy_to_user_auth(x->aalg, skb); 10521d1e34ddSDavid S. Miller if (ret) 10531d1e34ddSDavid S. Miller goto out; 10541d1e34ddSDavid S. Miller } 10551d1e34ddSDavid S. Miller if (x->ealg) { 1056c7a5899eSAntony Antony ret = copy_to_user_ealg(x->ealg, skb); 10571d1e34ddSDavid S. Miller if (ret) 10581d1e34ddSDavid S. Miller goto out; 10591d1e34ddSDavid S. Miller } 10601d1e34ddSDavid S. Miller if (x->calg) { 10611d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); 10621d1e34ddSDavid S. Miller if (ret) 10631d1e34ddSDavid S. Miller goto out; 10641d1e34ddSDavid S. Miller } 10651d1e34ddSDavid S. Miller if (x->encap) { 10661d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); 10671d1e34ddSDavid S. Miller if (ret) 10681d1e34ddSDavid S. Miller goto out; 10691d1e34ddSDavid S. Miller } 10701d1e34ddSDavid S. Miller if (x->tfcpad) { 10711d1e34ddSDavid S. Miller ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); 10721d1e34ddSDavid S. Miller if (ret) 10731d1e34ddSDavid S. Miller goto out; 10741d1e34ddSDavid S. Miller } 10751d1e34ddSDavid S. Miller ret = xfrm_mark_put(skb, &x->mark); 10761d1e34ddSDavid S. Miller if (ret) 10771d1e34ddSDavid S. Miller goto out; 10789b42c1f1SSteffen Klassert 10799b42c1f1SSteffen Klassert ret = xfrm_smark_put(skb, &x->props.smark); 10809b42c1f1SSteffen Klassert if (ret) 10819b42c1f1SSteffen Klassert goto out; 10829b42c1f1SSteffen Klassert 1083f293a5e3Sdingzhi if (x->replay_esn) 10841d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 1085d0fde795SDavid S. Miller xfrm_replay_state_esn_len(x->replay_esn), 10861d1e34ddSDavid S. Miller x->replay_esn); 1087f293a5e3Sdingzhi else 1088f293a5e3Sdingzhi ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 1089f293a5e3Sdingzhi &x->replay); 10901d1e34ddSDavid S. Miller if (ret) 10911d1e34ddSDavid S. Miller goto out; 1092d77e38e6SSteffen Klassert if(x->xso.dev) 1093d77e38e6SSteffen Klassert ret = copy_user_offload(&x->xso, skb); 1094d77e38e6SSteffen Klassert if (ret) 1095d77e38e6SSteffen Klassert goto out; 10967e652640SSteffen Klassert if (x->if_id) { 10977e652640SSteffen Klassert ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id); 1098077fbac4SLorenzo Colitti if (ret) 1099077fbac4SLorenzo Colitti goto out; 1100077fbac4SLorenzo Colitti } 11014e484b3eSAntony Antony if (x->security) { 11028598112dSSteffen Klassert ret = copy_sec_ctx(x->security, skb); 11034e484b3eSAntony Antony if (ret) 11044e484b3eSAntony Antony goto out; 11054e484b3eSAntony Antony } 11064e484b3eSAntony Antony if (x->mapping_maxage) 11074e484b3eSAntony Antony ret = nla_put_u32(skb, XFRMA_MTIMER_THRESH, x->mapping_maxage); 11081d1e34ddSDavid S. Miller out: 11091d1e34ddSDavid S. Miller return ret; 111068325d3bSHerbert Xu } 111168325d3bSHerbert Xu 111268325d3bSHerbert Xu static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 111368325d3bSHerbert Xu { 111468325d3bSHerbert Xu struct xfrm_dump_info *sp = ptr; 111568325d3bSHerbert Xu struct sk_buff *in_skb = sp->in_skb; 111668325d3bSHerbert Xu struct sk_buff *skb = sp->out_skb; 11175f3eea6bSDmitry Safonov struct xfrm_translator *xtr; 111868325d3bSHerbert Xu struct xfrm_usersa_info *p; 111968325d3bSHerbert Xu struct nlmsghdr *nlh; 112068325d3bSHerbert Xu int err; 112168325d3bSHerbert Xu 112215e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 112368325d3bSHerbert Xu XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); 112468325d3bSHerbert Xu if (nlh == NULL) 112568325d3bSHerbert Xu return -EMSGSIZE; 112668325d3bSHerbert Xu 112768325d3bSHerbert Xu p = nlmsg_data(nlh); 112868325d3bSHerbert Xu 112968325d3bSHerbert Xu err = copy_to_user_state_extra(x, p, skb); 11301d1e34ddSDavid S. Miller if (err) { 11319825069dSThomas Graf nlmsg_cancel(skb, nlh); 113268325d3bSHerbert Xu return err; 11331da177e4SLinus Torvalds } 11341d1e34ddSDavid S. Miller nlmsg_end(skb, nlh); 11355f3eea6bSDmitry Safonov 11365f3eea6bSDmitry Safonov xtr = xfrm_get_translator(); 11375f3eea6bSDmitry Safonov if (xtr) { 11385f3eea6bSDmitry Safonov err = xtr->alloc_compat(skb, nlh); 11395f3eea6bSDmitry Safonov 11405f3eea6bSDmitry Safonov xfrm_put_translator(xtr); 11415f3eea6bSDmitry Safonov if (err) { 11425f3eea6bSDmitry Safonov nlmsg_cancel(skb, nlh); 11435f3eea6bSDmitry Safonov return err; 11445f3eea6bSDmitry Safonov } 11455f3eea6bSDmitry Safonov } 11465f3eea6bSDmitry Safonov 11471d1e34ddSDavid S. Miller return 0; 11481d1e34ddSDavid S. Miller } 11491da177e4SLinus Torvalds 11504c563f76STimo Teras static int xfrm_dump_sa_done(struct netlink_callback *cb) 11514c563f76STimo Teras { 11524c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 1153283bc9f3SFan Du struct sock *sk = cb->skb->sk; 1154283bc9f3SFan Du struct net *net = sock_net(sk); 1155283bc9f3SFan Du 11561ba5bf99SVegard Nossum if (cb->args[0]) 1157283bc9f3SFan Du xfrm_state_walk_done(walk, net); 11584c563f76STimo Teras return 0; 11594c563f76STimo Teras } 11604c563f76STimo Teras 11611da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 11621da177e4SLinus Torvalds { 1163fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 11644c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 11651da177e4SLinus Torvalds struct xfrm_dump_info info; 11661da177e4SLinus Torvalds 11674c563f76STimo Teras BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > 11684c563f76STimo Teras sizeof(cb->args) - sizeof(cb->args[0])); 11694c563f76STimo Teras 11701da177e4SLinus Torvalds info.in_skb = cb->skb; 11711da177e4SLinus Torvalds info.out_skb = skb; 11721da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 11731da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 11744c563f76STimo Teras 11754c563f76STimo Teras if (!cb->args[0]) { 1176d3623099SNicolas Dichtel struct nlattr *attrs[XFRMA_MAX+1]; 1177870a2df4SNicolas Dichtel struct xfrm_address_filter *filter = NULL; 1178d3623099SNicolas Dichtel u8 proto = 0; 1179d3623099SNicolas Dichtel int err; 1180d3623099SNicolas Dichtel 11818cb08174SJohannes Berg err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX, 11828cb08174SJohannes Berg xfrma_policy, cb->extack); 1183d3623099SNicolas Dichtel if (err < 0) 1184d3623099SNicolas Dichtel return err; 1185d3623099SNicolas Dichtel 1186870a2df4SNicolas Dichtel if (attrs[XFRMA_ADDRESS_FILTER]) { 1187df367561SAndrzej Hajda filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), 1188df367561SAndrzej Hajda sizeof(*filter), GFP_KERNEL); 1189d3623099SNicolas Dichtel if (filter == NULL) 1190d3623099SNicolas Dichtel return -ENOMEM; 1191d3623099SNicolas Dichtel } 1192d3623099SNicolas Dichtel 1193d3623099SNicolas Dichtel if (attrs[XFRMA_PROTO]) 1194d3623099SNicolas Dichtel proto = nla_get_u8(attrs[XFRMA_PROTO]); 1195d3623099SNicolas Dichtel 1196d3623099SNicolas Dichtel xfrm_state_walk_init(walk, proto, filter); 11971ba5bf99SVegard Nossum cb->args[0] = 1; 11984c563f76STimo Teras } 11994c563f76STimo Teras 1200fc34acd3SAlexey Dobriyan (void) xfrm_state_walk(net, walk, dump_one_state, &info); 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvalds return skb->len; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 12061da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 12071da177e4SLinus Torvalds { 12081da177e4SLinus Torvalds struct xfrm_dump_info info; 12091da177e4SLinus Torvalds struct sk_buff *skb; 1210864745d2SMathias Krause int err; 12111da177e4SLinus Torvalds 12127deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 12131da177e4SLinus Torvalds if (!skb) 12141da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 12151da177e4SLinus Torvalds 12161da177e4SLinus Torvalds info.in_skb = in_skb; 12171da177e4SLinus Torvalds info.out_skb = skb; 12181da177e4SLinus Torvalds info.nlmsg_seq = seq; 12191da177e4SLinus Torvalds info.nlmsg_flags = 0; 12201da177e4SLinus Torvalds 1221864745d2SMathias Krause err = dump_one_state(x, 0, &info); 1222864745d2SMathias Krause if (err) { 12231da177e4SLinus Torvalds kfree_skb(skb); 1224864745d2SMathias Krause return ERR_PTR(err); 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds return skb; 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds 123021ee543eSMichal Kubecek /* A wrapper for nlmsg_multicast() checking that nlsk is still available. 123121ee543eSMichal Kubecek * Must be called with RCU read lock. 123221ee543eSMichal Kubecek */ 123321ee543eSMichal Kubecek static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, 123421ee543eSMichal Kubecek u32 pid, unsigned int group) 123521ee543eSMichal Kubecek { 123621ee543eSMichal Kubecek struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); 12375461fc0cSDmitry Safonov struct xfrm_translator *xtr; 123821ee543eSMichal Kubecek 123986126b77SFlorian Westphal if (!nlsk) { 124086126b77SFlorian Westphal kfree_skb(skb); 124186126b77SFlorian Westphal return -EPIPE; 124286126b77SFlorian Westphal } 124386126b77SFlorian Westphal 12445461fc0cSDmitry Safonov xtr = xfrm_get_translator(); 12455461fc0cSDmitry Safonov if (xtr) { 12465461fc0cSDmitry Safonov int err = xtr->alloc_compat(skb, nlmsg_hdr(skb)); 12475461fc0cSDmitry Safonov 12485461fc0cSDmitry Safonov xfrm_put_translator(xtr); 12495461fc0cSDmitry Safonov if (err) { 12505461fc0cSDmitry Safonov kfree_skb(skb); 12515461fc0cSDmitry Safonov return err; 12525461fc0cSDmitry Safonov } 12535461fc0cSDmitry Safonov } 12545461fc0cSDmitry Safonov 125521ee543eSMichal Kubecek return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); 125621ee543eSMichal Kubecek } 125721ee543eSMichal Kubecek 1258a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_spdinfo_msgsize(void) 12597deb2264SThomas Graf { 12607deb2264SThomas Graf return NLMSG_ALIGN(4) 12617deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_spdinfo)) 1262880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhinfo)) 1263880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)) 1264880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)); 12657deb2264SThomas Graf } 12667deb2264SThomas Graf 1267e071041bSAlexey Dobriyan static int build_spdinfo(struct sk_buff *skb, struct net *net, 126815e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 1269ecfd6b18SJamal Hadi Salim { 12705a6d3416SJamal Hadi Salim struct xfrmk_spdinfo si; 12715a6d3416SJamal Hadi Salim struct xfrmu_spdinfo spc; 12725a6d3416SJamal Hadi Salim struct xfrmu_spdhinfo sph; 1273880a6fabSChristophe Gouault struct xfrmu_spdhthresh spt4, spt6; 1274ecfd6b18SJamal Hadi Salim struct nlmsghdr *nlh; 12751d1e34ddSDavid S. Miller int err; 1276ecfd6b18SJamal Hadi Salim u32 *f; 1277880a6fabSChristophe Gouault unsigned lseq; 1278ecfd6b18SJamal Hadi Salim 127915e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); 128025985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 1281ecfd6b18SJamal Hadi Salim return -EMSGSIZE; 1282ecfd6b18SJamal Hadi Salim 1283ecfd6b18SJamal Hadi Salim f = nlmsg_data(nlh); 1284ecfd6b18SJamal Hadi Salim *f = flags; 1285e071041bSAlexey Dobriyan xfrm_spd_getinfo(net, &si); 12865a6d3416SJamal Hadi Salim spc.incnt = si.incnt; 12875a6d3416SJamal Hadi Salim spc.outcnt = si.outcnt; 12885a6d3416SJamal Hadi Salim spc.fwdcnt = si.fwdcnt; 12895a6d3416SJamal Hadi Salim spc.inscnt = si.inscnt; 12905a6d3416SJamal Hadi Salim spc.outscnt = si.outscnt; 12915a6d3416SJamal Hadi Salim spc.fwdscnt = si.fwdscnt; 12925a6d3416SJamal Hadi Salim sph.spdhcnt = si.spdhcnt; 12935a6d3416SJamal Hadi Salim sph.spdhmcnt = si.spdhmcnt; 1294ecfd6b18SJamal Hadi Salim 1295880a6fabSChristophe Gouault do { 1296880a6fabSChristophe Gouault lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); 1297880a6fabSChristophe Gouault 1298880a6fabSChristophe Gouault spt4.lbits = net->xfrm.policy_hthresh.lbits4; 1299880a6fabSChristophe Gouault spt4.rbits = net->xfrm.policy_hthresh.rbits4; 1300880a6fabSChristophe Gouault spt6.lbits = net->xfrm.policy_hthresh.lbits6; 1301880a6fabSChristophe Gouault spt6.rbits = net->xfrm.policy_hthresh.rbits6; 1302880a6fabSChristophe Gouault } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); 1303880a6fabSChristophe Gouault 13041d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); 13051d1e34ddSDavid S. Miller if (!err) 13061d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); 1307880a6fabSChristophe Gouault if (!err) 1308880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); 1309880a6fabSChristophe Gouault if (!err) 1310880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); 13111d1e34ddSDavid S. Miller if (err) { 13121d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 13131d1e34ddSDavid S. Miller return err; 13141d1e34ddSDavid S. Miller } 1315ecfd6b18SJamal Hadi Salim 1316053c095aSJohannes Berg nlmsg_end(skb, nlh); 1317053c095aSJohannes Berg return 0; 1318ecfd6b18SJamal Hadi Salim } 1319ecfd6b18SJamal Hadi Salim 1320880a6fabSChristophe Gouault static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 13213bec6c3eSSabrina Dubroca struct nlattr **attrs, 13223bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 1323880a6fabSChristophe Gouault { 1324880a6fabSChristophe Gouault struct net *net = sock_net(skb->sk); 1325880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh4 = NULL; 1326880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh6 = NULL; 1327880a6fabSChristophe Gouault 1328880a6fabSChristophe Gouault /* selector prefixlen thresholds to hash policies */ 1329880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { 1330880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; 1331880a6fabSChristophe Gouault 1332880a6fabSChristophe Gouault if (nla_len(rta) < sizeof(*thresh4)) 1333880a6fabSChristophe Gouault return -EINVAL; 1334880a6fabSChristophe Gouault thresh4 = nla_data(rta); 1335880a6fabSChristophe Gouault if (thresh4->lbits > 32 || thresh4->rbits > 32) 1336880a6fabSChristophe Gouault return -EINVAL; 1337880a6fabSChristophe Gouault } 1338880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { 1339880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; 1340880a6fabSChristophe Gouault 1341880a6fabSChristophe Gouault if (nla_len(rta) < sizeof(*thresh6)) 1342880a6fabSChristophe Gouault return -EINVAL; 1343880a6fabSChristophe Gouault thresh6 = nla_data(rta); 1344880a6fabSChristophe Gouault if (thresh6->lbits > 128 || thresh6->rbits > 128) 1345880a6fabSChristophe Gouault return -EINVAL; 1346880a6fabSChristophe Gouault } 1347880a6fabSChristophe Gouault 1348880a6fabSChristophe Gouault if (thresh4 || thresh6) { 1349880a6fabSChristophe Gouault write_seqlock(&net->xfrm.policy_hthresh.lock); 1350880a6fabSChristophe Gouault if (thresh4) { 1351880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; 1352880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; 1353880a6fabSChristophe Gouault } 1354880a6fabSChristophe Gouault if (thresh6) { 1355880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; 1356880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; 1357880a6fabSChristophe Gouault } 1358880a6fabSChristophe Gouault write_sequnlock(&net->xfrm.policy_hthresh.lock); 1359880a6fabSChristophe Gouault 1360880a6fabSChristophe Gouault xfrm_policy_hash_rebuild(net); 1361880a6fabSChristophe Gouault } 1362880a6fabSChristophe Gouault 1363880a6fabSChristophe Gouault return 0; 1364880a6fabSChristophe Gouault } 1365880a6fabSChristophe Gouault 1366ecfd6b18SJamal Hadi Salim static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 13673bec6c3eSSabrina Dubroca struct nlattr **attrs, 13683bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 1369ecfd6b18SJamal Hadi Salim { 1370a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 1371ecfd6b18SJamal Hadi Salim struct sk_buff *r_skb; 13727b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 137315e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 1374ecfd6b18SJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 13752fc5f83bSGustavo A. R. Silva int err; 1376ecfd6b18SJamal Hadi Salim 13777deb2264SThomas Graf r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); 1378ecfd6b18SJamal Hadi Salim if (r_skb == NULL) 1379ecfd6b18SJamal Hadi Salim return -ENOMEM; 1380ecfd6b18SJamal Hadi Salim 13812fc5f83bSGustavo A. R. Silva err = build_spdinfo(r_skb, net, sportid, seq, *flags); 13822fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 1383ecfd6b18SJamal Hadi Salim 138415e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 1385ecfd6b18SJamal Hadi Salim } 1386ecfd6b18SJamal Hadi Salim 1387a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sadinfo_msgsize(void) 13887deb2264SThomas Graf { 13897deb2264SThomas Graf return NLMSG_ALIGN(4) 13907deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_sadhinfo)) 13917deb2264SThomas Graf + nla_total_size(4); /* XFRMA_SAD_CNT */ 13927deb2264SThomas Graf } 13937deb2264SThomas Graf 1394e071041bSAlexey Dobriyan static int build_sadinfo(struct sk_buff *skb, struct net *net, 139515e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 139628d8909bSJamal Hadi Salim { 1397af11e316SJamal Hadi Salim struct xfrmk_sadinfo si; 1398af11e316SJamal Hadi Salim struct xfrmu_sadhinfo sh; 139928d8909bSJamal Hadi Salim struct nlmsghdr *nlh; 14001d1e34ddSDavid S. Miller int err; 140128d8909bSJamal Hadi Salim u32 *f; 140228d8909bSJamal Hadi Salim 140315e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); 140425985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 140528d8909bSJamal Hadi Salim return -EMSGSIZE; 140628d8909bSJamal Hadi Salim 140728d8909bSJamal Hadi Salim f = nlmsg_data(nlh); 140828d8909bSJamal Hadi Salim *f = flags; 1409e071041bSAlexey Dobriyan xfrm_sad_getinfo(net, &si); 141028d8909bSJamal Hadi Salim 1411af11e316SJamal Hadi Salim sh.sadhmcnt = si.sadhmcnt; 1412af11e316SJamal Hadi Salim sh.sadhcnt = si.sadhcnt; 1413af11e316SJamal Hadi Salim 14141d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); 14151d1e34ddSDavid S. Miller if (!err) 14161d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); 14171d1e34ddSDavid S. Miller if (err) { 14181d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 14191d1e34ddSDavid S. Miller return err; 14201d1e34ddSDavid S. Miller } 142128d8909bSJamal Hadi Salim 1422053c095aSJohannes Berg nlmsg_end(skb, nlh); 1423053c095aSJohannes Berg return 0; 142428d8909bSJamal Hadi Salim } 142528d8909bSJamal Hadi Salim 142628d8909bSJamal Hadi Salim static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 14273bec6c3eSSabrina Dubroca struct nlattr **attrs, 14283bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 142928d8909bSJamal Hadi Salim { 1430a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 143128d8909bSJamal Hadi Salim struct sk_buff *r_skb; 14327b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 143315e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 143428d8909bSJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 14352fc5f83bSGustavo A. R. Silva int err; 143628d8909bSJamal Hadi Salim 14377deb2264SThomas Graf r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); 143828d8909bSJamal Hadi Salim if (r_skb == NULL) 143928d8909bSJamal Hadi Salim return -ENOMEM; 144028d8909bSJamal Hadi Salim 14412fc5f83bSGustavo A. R. Silva err = build_sadinfo(r_skb, net, sportid, seq, *flags); 14422fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 144328d8909bSJamal Hadi Salim 144415e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 144528d8909bSJamal Hadi Salim } 144628d8909bSJamal Hadi Salim 144722e70050SChristoph Hellwig static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 14483bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 14491da177e4SLinus Torvalds { 1450fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 14517b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 14521da177e4SLinus Torvalds struct xfrm_state *x; 14531da177e4SLinus Torvalds struct sk_buff *resp_skb; 1454eb2971b6SMasahide NAKAMURA int err = -ESRCH; 14551da177e4SLinus Torvalds 1456fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 14571da177e4SLinus Torvalds if (x == NULL) 14581da177e4SLinus Torvalds goto out_noput; 14591da177e4SLinus Torvalds 14601da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 14611da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 14621da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 14631da177e4SLinus Torvalds } else { 146415e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 14651da177e4SLinus Torvalds } 14661da177e4SLinus Torvalds xfrm_state_put(x); 14671da177e4SLinus Torvalds out_noput: 14681da177e4SLinus Torvalds return err; 14691da177e4SLinus Torvalds } 14701da177e4SLinus Torvalds 147122e70050SChristoph Hellwig static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, 14723bec6c3eSSabrina Dubroca struct nlattr **attrs, 14733bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 14741da177e4SLinus Torvalds { 1475fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 14761da177e4SLinus Torvalds struct xfrm_state *x; 14771da177e4SLinus Torvalds struct xfrm_userspi_info *p; 14785f3eea6bSDmitry Safonov struct xfrm_translator *xtr; 14791da177e4SLinus Torvalds struct sk_buff *resp_skb; 14801da177e4SLinus Torvalds xfrm_address_t *daddr; 14811da177e4SLinus Torvalds int family; 14821da177e4SLinus Torvalds int err; 14836f26b61eSJamal Hadi Salim u32 mark; 14846f26b61eSJamal Hadi Salim struct xfrm_mark m; 14857e652640SSteffen Klassert u32 if_id = 0; 14861da177e4SLinus Torvalds 14877b67c857SThomas Graf p = nlmsg_data(nlh); 1488776e9dd9SFan Du err = verify_spi_info(p->info.id.proto, p->min, p->max); 14891da177e4SLinus Torvalds if (err) 14901da177e4SLinus Torvalds goto out_noput; 14911da177e4SLinus Torvalds 14921da177e4SLinus Torvalds family = p->info.family; 14931da177e4SLinus Torvalds daddr = &p->info.id.daddr; 14941da177e4SLinus Torvalds 14951da177e4SLinus Torvalds x = NULL; 14966f26b61eSJamal Hadi Salim 14976f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 14987e652640SSteffen Klassert 1499a3d9001bSKai Lueke if (attrs[XFRMA_IF_ID]) 15007e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 15017e652640SSteffen Klassert 15021da177e4SLinus Torvalds if (p->info.seq) { 15036f26b61eSJamal Hadi Salim x = xfrm_find_acq_byseq(net, mark, p->info.seq); 150470e94e66SYOSHIFUJI Hideaki / 吉藤英明 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { 15051da177e4SLinus Torvalds xfrm_state_put(x); 15061da177e4SLinus Torvalds x = NULL; 15071da177e4SLinus Torvalds } 15081da177e4SLinus Torvalds } 15091da177e4SLinus Torvalds 15101da177e4SLinus Torvalds if (!x) 15116f26b61eSJamal Hadi Salim x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, 15127e652640SSteffen Klassert if_id, p->info.id.proto, daddr, 15131da177e4SLinus Torvalds &p->info.saddr, 1, 15141da177e4SLinus Torvalds family); 15151da177e4SLinus Torvalds err = -ENOENT; 15161da177e4SLinus Torvalds if (x == NULL) 15171da177e4SLinus Torvalds goto out_noput; 15181da177e4SLinus Torvalds 1519658b219eSHerbert Xu err = xfrm_alloc_spi(x, p->min, p->max); 1520658b219eSHerbert Xu if (err) 1521658b219eSHerbert Xu goto out; 15221da177e4SLinus Torvalds 15231da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 15241da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 15251da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 15261da177e4SLinus Torvalds goto out; 15271da177e4SLinus Torvalds } 15281da177e4SLinus Torvalds 15295f3eea6bSDmitry Safonov xtr = xfrm_get_translator(); 15305f3eea6bSDmitry Safonov if (xtr) { 15315f3eea6bSDmitry Safonov err = xtr->alloc_compat(skb, nlmsg_hdr(skb)); 15325f3eea6bSDmitry Safonov 15335f3eea6bSDmitry Safonov xfrm_put_translator(xtr); 15345f3eea6bSDmitry Safonov if (err) { 15355f3eea6bSDmitry Safonov kfree_skb(resp_skb); 15365f3eea6bSDmitry Safonov goto out; 15375f3eea6bSDmitry Safonov } 15385f3eea6bSDmitry Safonov } 15395f3eea6bSDmitry Safonov 154015e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 15411da177e4SLinus Torvalds 15421da177e4SLinus Torvalds out: 15431da177e4SLinus Torvalds xfrm_state_put(x); 15441da177e4SLinus Torvalds out_noput: 15451da177e4SLinus Torvalds return err; 15461da177e4SLinus Torvalds } 15471da177e4SLinus Torvalds 154824fc544fSSabrina Dubroca static int verify_policy_dir(u8 dir, struct netlink_ext_ack *extack) 15491da177e4SLinus Torvalds { 15501da177e4SLinus Torvalds switch (dir) { 15511da177e4SLinus Torvalds case XFRM_POLICY_IN: 15521da177e4SLinus Torvalds case XFRM_POLICY_OUT: 15531da177e4SLinus Torvalds case XFRM_POLICY_FWD: 15541da177e4SLinus Torvalds break; 15551da177e4SLinus Torvalds 15561da177e4SLinus Torvalds default: 155724fc544fSSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy direction"); 15581da177e4SLinus Torvalds return -EINVAL; 15593ff50b79SStephen Hemminger } 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds return 0; 15621da177e4SLinus Torvalds } 15631da177e4SLinus Torvalds 1564fb7deabaSSabrina Dubroca static int verify_policy_type(u8 type, struct netlink_ext_ack *extack) 1565f7b6983fSMasahide NAKAMURA { 1566f7b6983fSMasahide NAKAMURA switch (type) { 1567f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_MAIN: 1568f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1569f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_SUB: 1570f7b6983fSMasahide NAKAMURA #endif 1571f7b6983fSMasahide NAKAMURA break; 1572f7b6983fSMasahide NAKAMURA 1573f7b6983fSMasahide NAKAMURA default: 1574fb7deabaSSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy type"); 1575f7b6983fSMasahide NAKAMURA return -EINVAL; 15763ff50b79SStephen Hemminger } 1577f7b6983fSMasahide NAKAMURA 1578f7b6983fSMasahide NAKAMURA return 0; 1579f7b6983fSMasahide NAKAMURA } 1580f7b6983fSMasahide NAKAMURA 1581ec2b4f01SSabrina Dubroca static int verify_newpolicy_info(struct xfrm_userpolicy_info *p, 1582ec2b4f01SSabrina Dubroca struct netlink_ext_ack *extack) 15831da177e4SLinus Torvalds { 1584e682adf0SFan Du int ret; 1585e682adf0SFan Du 15861da177e4SLinus Torvalds switch (p->share) { 15871da177e4SLinus Torvalds case XFRM_SHARE_ANY: 15881da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 15891da177e4SLinus Torvalds case XFRM_SHARE_USER: 15901da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 15911da177e4SLinus Torvalds break; 15921da177e4SLinus Torvalds 15931da177e4SLinus Torvalds default: 1594ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy share"); 15951da177e4SLinus Torvalds return -EINVAL; 15963ff50b79SStephen Hemminger } 15971da177e4SLinus Torvalds 15981da177e4SLinus Torvalds switch (p->action) { 15991da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 16001da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 16011da177e4SLinus Torvalds break; 16021da177e4SLinus Torvalds 16031da177e4SLinus Torvalds default: 1604ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy action"); 16051da177e4SLinus Torvalds return -EINVAL; 16063ff50b79SStephen Hemminger } 16071da177e4SLinus Torvalds 16081da177e4SLinus Torvalds switch (p->sel.family) { 16091da177e4SLinus Torvalds case AF_INET: 1610ec2b4f01SSabrina Dubroca if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) { 1611ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)"); 161207bf7908SSteffen Klassert return -EINVAL; 1613ec2b4f01SSabrina Dubroca } 161407bf7908SSteffen Klassert 16151da177e4SLinus Torvalds break; 16161da177e4SLinus Torvalds 16171da177e4SLinus Torvalds case AF_INET6: 1618dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 1619ec2b4f01SSabrina Dubroca if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) { 1620ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)"); 162107bf7908SSteffen Klassert return -EINVAL; 1622ec2b4f01SSabrina Dubroca } 162307bf7908SSteffen Klassert 16241da177e4SLinus Torvalds break; 16251da177e4SLinus Torvalds #else 1626ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "IPv6 support disabled"); 16271da177e4SLinus Torvalds return -EAFNOSUPPORT; 16281da177e4SLinus Torvalds #endif 16291da177e4SLinus Torvalds 16301da177e4SLinus Torvalds default: 1631ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid selector family"); 16321da177e4SLinus Torvalds return -EINVAL; 16333ff50b79SStephen Hemminger } 16341da177e4SLinus Torvalds 163524fc544fSSabrina Dubroca ret = verify_policy_dir(p->dir, extack); 1636e682adf0SFan Du if (ret) 1637e682adf0SFan Du return ret; 1638ec2b4f01SSabrina Dubroca if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) { 1639ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Policy index doesn't match direction"); 1640e682adf0SFan Du return -EINVAL; 1641ec2b4f01SSabrina Dubroca } 1642e682adf0SFan Du 1643e682adf0SFan Du return 0; 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds 16465424f32eSThomas Graf static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) 1647df71837dSTrent Jaeger { 16485424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 1649df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 1650df71837dSTrent Jaeger 1651df71837dSTrent Jaeger if (!rt) 1652df71837dSTrent Jaeger return 0; 1653df71837dSTrent Jaeger 16545424f32eSThomas Graf uctx = nla_data(rt); 165552a4c640SNikolay Aleksandrov return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); 1656df71837dSTrent Jaeger } 1657df71837dSTrent Jaeger 16581da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 16591da177e4SLinus Torvalds int nr) 16601da177e4SLinus Torvalds { 16611da177e4SLinus Torvalds int i; 16621da177e4SLinus Torvalds 16631da177e4SLinus Torvalds xp->xfrm_nr = nr; 16641da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 16651da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 16661da177e4SLinus Torvalds 16671da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 16681da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 16691da177e4SLinus Torvalds sizeof(xfrm_address_t)); 16701da177e4SLinus Torvalds t->reqid = ut->reqid; 16711da177e4SLinus Torvalds t->mode = ut->mode; 16721da177e4SLinus Torvalds t->share = ut->share; 16731da177e4SLinus Torvalds t->optional = ut->optional; 16741da177e4SLinus Torvalds t->aalgos = ut->aalgos; 16751da177e4SLinus Torvalds t->ealgos = ut->ealgos; 16761da177e4SLinus Torvalds t->calgos = ut->calgos; 1677c5d18e98SHerbert Xu /* If all masks are ~0, then we allow all algorithms. */ 1678c5d18e98SHerbert Xu t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); 16798511d01dSMiika Komu t->encap_family = ut->family; 16801da177e4SLinus Torvalds } 16811da177e4SLinus Torvalds } 16821da177e4SLinus Torvalds 1683d37bed89SSabrina Dubroca static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family, 1684d37bed89SSabrina Dubroca struct netlink_ext_ack *extack) 1685b4ad86bfSDavid S. Miller { 1686732706afSSteffen Klassert u16 prev_family; 1687b4ad86bfSDavid S. Miller int i; 1688b4ad86bfSDavid S. Miller 1689d37bed89SSabrina Dubroca if (nr > XFRM_MAX_DEPTH) { 1690d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Template count must be <= XFRM_MAX_DEPTH (" __stringify(XFRM_MAX_DEPTH) ")"); 1691b4ad86bfSDavid S. Miller return -EINVAL; 1692d37bed89SSabrina Dubroca } 1693b4ad86bfSDavid S. Miller 1694732706afSSteffen Klassert prev_family = family; 1695732706afSSteffen Klassert 1696b4ad86bfSDavid S. Miller for (i = 0; i < nr; i++) { 1697b4ad86bfSDavid S. Miller /* We never validated the ut->family value, so many 1698b4ad86bfSDavid S. Miller * applications simply leave it at zero. The check was 1699b4ad86bfSDavid S. Miller * never made and ut->family was ignored because all 1700b4ad86bfSDavid S. Miller * templates could be assumed to have the same family as 1701b4ad86bfSDavid S. Miller * the policy itself. Now that we will have ipv4-in-ipv6 1702b4ad86bfSDavid S. Miller * and ipv6-in-ipv4 tunnels, this is no longer true. 1703b4ad86bfSDavid S. Miller */ 1704b4ad86bfSDavid S. Miller if (!ut[i].family) 1705b4ad86bfSDavid S. Miller ut[i].family = family; 1706b4ad86bfSDavid S. Miller 170735e61038SFlorian Westphal switch (ut[i].mode) { 170835e61038SFlorian Westphal case XFRM_MODE_TUNNEL: 170935e61038SFlorian Westphal case XFRM_MODE_BEET: 171035e61038SFlorian Westphal break; 171135e61038SFlorian Westphal default: 1712d37bed89SSabrina Dubroca if (ut[i].family != prev_family) { 1713d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change"); 1714732706afSSteffen Klassert return -EINVAL; 1715d37bed89SSabrina Dubroca } 171635e61038SFlorian Westphal break; 171735e61038SFlorian Westphal } 1718d37bed89SSabrina Dubroca if (ut[i].mode >= XFRM_MODE_MAX) { 1719d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Mode in template must be < XFRM_MODE_MAX (" __stringify(XFRM_MODE_MAX) ")"); 172032bf94fbSSean Tranchetti return -EINVAL; 1721d37bed89SSabrina Dubroca } 172232bf94fbSSean Tranchetti 1723732706afSSteffen Klassert prev_family = ut[i].family; 1724732706afSSteffen Klassert 1725b4ad86bfSDavid S. Miller switch (ut[i].family) { 1726b4ad86bfSDavid S. Miller case AF_INET: 1727b4ad86bfSDavid S. Miller break; 1728dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 1729b4ad86bfSDavid S. Miller case AF_INET6: 1730b4ad86bfSDavid S. Miller break; 1731b4ad86bfSDavid S. Miller #endif 1732b4ad86bfSDavid S. Miller default: 1733d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid family in template"); 1734b4ad86bfSDavid S. Miller return -EINVAL; 17353ff50b79SStephen Hemminger } 17366a53b759SCong Wang 1737d37bed89SSabrina Dubroca if (!xfrm_id_proto_valid(ut[i].id.proto)) { 1738d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid XFRM protocol in template"); 17396a53b759SCong Wang return -EINVAL; 17406a53b759SCong Wang } 1741d37bed89SSabrina Dubroca } 17426a53b759SCong Wang 1743b4ad86bfSDavid S. Miller return 0; 1744b4ad86bfSDavid S. Miller } 1745b4ad86bfSDavid S. Miller 1746d37bed89SSabrina Dubroca static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs, 1747d37bed89SSabrina Dubroca struct netlink_ext_ack *extack) 17481da177e4SLinus Torvalds { 17495424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 17501da177e4SLinus Torvalds 17511da177e4SLinus Torvalds if (!rt) { 17521da177e4SLinus Torvalds pol->xfrm_nr = 0; 17531da177e4SLinus Torvalds } else { 17545424f32eSThomas Graf struct xfrm_user_tmpl *utmpl = nla_data(rt); 17555424f32eSThomas Graf int nr = nla_len(rt) / sizeof(*utmpl); 1756b4ad86bfSDavid S. Miller int err; 17571da177e4SLinus Torvalds 1758d37bed89SSabrina Dubroca err = validate_tmpl(nr, utmpl, pol->family, extack); 1759b4ad86bfSDavid S. Miller if (err) 1760b4ad86bfSDavid S. Miller return err; 17611da177e4SLinus Torvalds 17625424f32eSThomas Graf copy_templates(pol, utmpl, nr); 17631da177e4SLinus Torvalds } 17641da177e4SLinus Torvalds return 0; 17651da177e4SLinus Torvalds } 17661da177e4SLinus Torvalds 1767fb7deabaSSabrina Dubroca static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs, 1768fb7deabaSSabrina Dubroca struct netlink_ext_ack *extack) 1769f7b6983fSMasahide NAKAMURA { 17705424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; 1771f7b6983fSMasahide NAKAMURA struct xfrm_userpolicy_type *upt; 1772b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 1773f7b6983fSMasahide NAKAMURA int err; 1774f7b6983fSMasahide NAKAMURA 1775f7b6983fSMasahide NAKAMURA if (rt) { 17765424f32eSThomas Graf upt = nla_data(rt); 1777f7b6983fSMasahide NAKAMURA type = upt->type; 1778f7b6983fSMasahide NAKAMURA } 1779f7b6983fSMasahide NAKAMURA 1780fb7deabaSSabrina Dubroca err = verify_policy_type(type, extack); 1781f7b6983fSMasahide NAKAMURA if (err) 1782f7b6983fSMasahide NAKAMURA return err; 1783f7b6983fSMasahide NAKAMURA 1784f7b6983fSMasahide NAKAMURA *tp = type; 1785f7b6983fSMasahide NAKAMURA return 0; 1786f7b6983fSMasahide NAKAMURA } 1787f7b6983fSMasahide NAKAMURA 17881da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 17891da177e4SLinus Torvalds { 17901da177e4SLinus Torvalds xp->priority = p->priority; 17911da177e4SLinus Torvalds xp->index = p->index; 17921da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 17931da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 17941da177e4SLinus Torvalds xp->action = p->action; 17951da177e4SLinus Torvalds xp->flags = p->flags; 17961da177e4SLinus Torvalds xp->family = p->sel.family; 17971da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 17981da177e4SLinus Torvalds } 17991da177e4SLinus Torvalds 18001da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 18011da177e4SLinus Torvalds { 18027b789836SMathias Krause memset(p, 0, sizeof(*p)); 18031da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 18041da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 18051da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 18061da177e4SLinus Torvalds p->priority = xp->priority; 18071da177e4SLinus Torvalds p->index = xp->index; 18081da177e4SLinus Torvalds p->sel.family = xp->family; 18091da177e4SLinus Torvalds p->dir = dir; 18101da177e4SLinus Torvalds p->action = xp->action; 18111da177e4SLinus Torvalds p->flags = xp->flags; 18121da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 18131da177e4SLinus Torvalds } 18141da177e4SLinus Torvalds 1815fb7deabaSSabrina Dubroca static struct xfrm_policy *xfrm_policy_construct(struct net *net, 1816fb7deabaSSabrina Dubroca struct xfrm_userpolicy_info *p, 1817fb7deabaSSabrina Dubroca struct nlattr **attrs, 1818fb7deabaSSabrina Dubroca int *errp, 1819fb7deabaSSabrina Dubroca struct netlink_ext_ack *extack) 18201da177e4SLinus Torvalds { 1821fc34acd3SAlexey Dobriyan struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); 18221da177e4SLinus Torvalds int err; 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds if (!xp) { 18251da177e4SLinus Torvalds *errp = -ENOMEM; 18261da177e4SLinus Torvalds return NULL; 18271da177e4SLinus Torvalds } 18281da177e4SLinus Torvalds 18291da177e4SLinus Torvalds copy_from_user_policy(xp, p); 1830df71837dSTrent Jaeger 1831fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&xp->type, attrs, extack); 1832f7b6983fSMasahide NAKAMURA if (err) 1833f7b6983fSMasahide NAKAMURA goto error; 1834f7b6983fSMasahide NAKAMURA 1835d37bed89SSabrina Dubroca if (!(err = copy_from_user_tmpl(xp, attrs, extack))) 183635a7aa08SThomas Graf err = copy_from_user_sec_ctx(xp, attrs); 1837f7b6983fSMasahide NAKAMURA if (err) 1838f7b6983fSMasahide NAKAMURA goto error; 18391da177e4SLinus Torvalds 1840295fae56SJamal Hadi Salim xfrm_mark_get(attrs, &xp->mark); 1841295fae56SJamal Hadi Salim 1842a3d9001bSKai Lueke if (attrs[XFRMA_IF_ID]) 18437e652640SSteffen Klassert xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 18447e652640SSteffen Klassert 18451da177e4SLinus Torvalds return xp; 1846f7b6983fSMasahide NAKAMURA error: 1847f7b6983fSMasahide NAKAMURA *errp = err; 184812a169e7SHerbert Xu xp->walk.dead = 1; 184964c31b3fSWANG Cong xfrm_policy_destroy(xp); 1850f7b6983fSMasahide NAKAMURA return NULL; 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds 185322e70050SChristoph Hellwig static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 18543bec6c3eSSabrina Dubroca struct nlattr **attrs, 18553bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 18561da177e4SLinus Torvalds { 1857fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 18587b67c857SThomas Graf struct xfrm_userpolicy_info *p = nlmsg_data(nlh); 18591da177e4SLinus Torvalds struct xfrm_policy *xp; 186026b15dadSJamal Hadi Salim struct km_event c; 18611da177e4SLinus Torvalds int err; 18621da177e4SLinus Torvalds int excl; 18631da177e4SLinus Torvalds 1864ec2b4f01SSabrina Dubroca err = verify_newpolicy_info(p, extack); 18651da177e4SLinus Torvalds if (err) 18661da177e4SLinus Torvalds return err; 186708a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 1868df71837dSTrent Jaeger if (err) 1869df71837dSTrent Jaeger return err; 18701da177e4SLinus Torvalds 1871fb7deabaSSabrina Dubroca xp = xfrm_policy_construct(net, p, attrs, &err, extack); 18721da177e4SLinus Torvalds if (!xp) 18731da177e4SLinus Torvalds return err; 18741da177e4SLinus Torvalds 187525985edcSLucas De Marchi /* shouldn't excl be based on nlh flags?? 187626b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 1877a7fd0e6dSBhaskar Chowdhury * in netlink excl is a flag and you wouldn't need 187826b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 18791da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 18801da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 18812e71029eSTetsuo Handa xfrm_audit_policy_add(xp, err ? 0 : 1, true); 1882161a09e7SJoy Latten 18831da177e4SLinus Torvalds if (err) { 188403e1ad7bSPaul Moore security_xfrm_policy_free(xp->security); 18851da177e4SLinus Torvalds kfree(xp); 18861da177e4SLinus Torvalds return err; 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds 1889f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 189026b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 189115e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 189226b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 189326b15dadSJamal Hadi Salim 18941da177e4SLinus Torvalds xfrm_pol_put(xp); 18951da177e4SLinus Torvalds 18961da177e4SLinus Torvalds return 0; 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds 18991da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 19001da177e4SLinus Torvalds { 19011da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 19021da177e4SLinus Torvalds int i; 19031da177e4SLinus Torvalds 19041da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 19051da177e4SLinus Torvalds return 0; 19061da177e4SLinus Torvalds 19071da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 19081da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 19091da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 19101da177e4SLinus Torvalds 19111f86840fSMathias Krause memset(up, 0, sizeof(*up)); 19121da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 19138511d01dSMiika Komu up->family = kp->encap_family; 19141da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 19151da177e4SLinus Torvalds up->reqid = kp->reqid; 19161da177e4SLinus Torvalds up->mode = kp->mode; 19171da177e4SLinus Torvalds up->share = kp->share; 19181da177e4SLinus Torvalds up->optional = kp->optional; 19191da177e4SLinus Torvalds up->aalgos = kp->aalgos; 19201da177e4SLinus Torvalds up->ealgos = kp->ealgos; 19211da177e4SLinus Torvalds up->calgos = kp->calgos; 19221da177e4SLinus Torvalds } 19231da177e4SLinus Torvalds 1924c0144beaSThomas Graf return nla_put(skb, XFRMA_TMPL, 1925c0144beaSThomas Graf sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); 1926df71837dSTrent Jaeger } 1927df71837dSTrent Jaeger 19280d681623SSerge Hallyn static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) 19290d681623SSerge Hallyn { 19300d681623SSerge Hallyn if (x->security) { 19310d681623SSerge Hallyn return copy_sec_ctx(x->security, skb); 19320d681623SSerge Hallyn } 19330d681623SSerge Hallyn return 0; 19340d681623SSerge Hallyn } 19350d681623SSerge Hallyn 19360d681623SSerge Hallyn static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) 19370d681623SSerge Hallyn { 19381d1e34ddSDavid S. Miller if (xp->security) 19390d681623SSerge Hallyn return copy_sec_ctx(xp->security, skb); 19400d681623SSerge Hallyn return 0; 19410d681623SSerge Hallyn } 1942a1b831f2SAlexey Dobriyan static inline unsigned int userpolicy_type_attrsize(void) 1943cfbfd45aSThomas Graf { 1944cfbfd45aSThomas Graf #ifdef CONFIG_XFRM_SUB_POLICY 1945cfbfd45aSThomas Graf return nla_total_size(sizeof(struct xfrm_userpolicy_type)); 1946cfbfd45aSThomas Graf #else 1947cfbfd45aSThomas Graf return 0; 1948cfbfd45aSThomas Graf #endif 1949cfbfd45aSThomas Graf } 19500d681623SSerge Hallyn 1951f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1952b798a9edSJamal Hadi Salim static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 1953f7b6983fSMasahide NAKAMURA { 195445c180bcSEric Dumazet struct xfrm_userpolicy_type upt; 195545c180bcSEric Dumazet 195645c180bcSEric Dumazet /* Sadly there are two holes in struct xfrm_userpolicy_type */ 195745c180bcSEric Dumazet memset(&upt, 0, sizeof(upt)); 195845c180bcSEric Dumazet upt.type = type; 1959f7b6983fSMasahide NAKAMURA 1960c0144beaSThomas Graf return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); 1961f7b6983fSMasahide NAKAMURA } 1962f7b6983fSMasahide NAKAMURA 1963f7b6983fSMasahide NAKAMURA #else 1964b798a9edSJamal Hadi Salim static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 1965f7b6983fSMasahide NAKAMURA { 1966f7b6983fSMasahide NAKAMURA return 0; 1967f7b6983fSMasahide NAKAMURA } 1968f7b6983fSMasahide NAKAMURA #endif 1969f7b6983fSMasahide NAKAMURA 19701da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 19711da177e4SLinus Torvalds { 19721da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 19731da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 19741da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 19751da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 19765f3eea6bSDmitry Safonov struct xfrm_translator *xtr; 19771da177e4SLinus Torvalds struct nlmsghdr *nlh; 19781d1e34ddSDavid S. Miller int err; 19791da177e4SLinus Torvalds 198015e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 198179b8b7f4SThomas Graf XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); 198279b8b7f4SThomas Graf if (nlh == NULL) 198379b8b7f4SThomas Graf return -EMSGSIZE; 19841da177e4SLinus Torvalds 19857b67c857SThomas Graf p = nlmsg_data(nlh); 19861da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 19871d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 19881d1e34ddSDavid S. Miller if (!err) 19891d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 19901d1e34ddSDavid S. Miller if (!err) 19911d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 19921d1e34ddSDavid S. Miller if (!err) 19931d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 19947e652640SSteffen Klassert if (!err) 19957e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 19961d1e34ddSDavid S. Miller if (err) { 19971d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 19981d1e34ddSDavid S. Miller return err; 19991d1e34ddSDavid S. Miller } 20009825069dSThomas Graf nlmsg_end(skb, nlh); 20015f3eea6bSDmitry Safonov 20025f3eea6bSDmitry Safonov xtr = xfrm_get_translator(); 20035f3eea6bSDmitry Safonov if (xtr) { 20045f3eea6bSDmitry Safonov err = xtr->alloc_compat(skb, nlh); 20055f3eea6bSDmitry Safonov 20065f3eea6bSDmitry Safonov xfrm_put_translator(xtr); 20075f3eea6bSDmitry Safonov if (err) { 20085f3eea6bSDmitry Safonov nlmsg_cancel(skb, nlh); 20095f3eea6bSDmitry Safonov return err; 20105f3eea6bSDmitry Safonov } 20115f3eea6bSDmitry Safonov } 20125f3eea6bSDmitry Safonov 20131da177e4SLinus Torvalds return 0; 20141da177e4SLinus Torvalds } 20151da177e4SLinus Torvalds 20164c563f76STimo Teras static int xfrm_dump_policy_done(struct netlink_callback *cb) 20174c563f76STimo Teras { 20181137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 2019283bc9f3SFan Du struct net *net = sock_net(cb->skb->sk); 20204c563f76STimo Teras 2021283bc9f3SFan Du xfrm_policy_walk_done(walk, net); 20224c563f76STimo Teras return 0; 20234c563f76STimo Teras } 20244c563f76STimo Teras 20251137b5e2SHerbert Xu static int xfrm_dump_policy_start(struct netlink_callback *cb) 20261137b5e2SHerbert Xu { 20271137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 20281137b5e2SHerbert Xu 20291137b5e2SHerbert Xu BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args)); 20301137b5e2SHerbert Xu 20311137b5e2SHerbert Xu xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); 20321137b5e2SHerbert Xu return 0; 20331137b5e2SHerbert Xu } 20341137b5e2SHerbert Xu 20351da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 20361da177e4SLinus Torvalds { 2037fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 20381137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 20391da177e4SLinus Torvalds struct xfrm_dump_info info; 20401da177e4SLinus Torvalds 20411da177e4SLinus Torvalds info.in_skb = cb->skb; 20421da177e4SLinus Torvalds info.out_skb = skb; 20431da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 20441da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 20454c563f76STimo Teras 2046fc34acd3SAlexey Dobriyan (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); 20471da177e4SLinus Torvalds 20481da177e4SLinus Torvalds return skb->len; 20491da177e4SLinus Torvalds } 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 20521da177e4SLinus Torvalds struct xfrm_policy *xp, 20531da177e4SLinus Torvalds int dir, u32 seq) 20541da177e4SLinus Torvalds { 20551da177e4SLinus Torvalds struct xfrm_dump_info info; 20561da177e4SLinus Torvalds struct sk_buff *skb; 2057c2546372SMathias Krause int err; 20581da177e4SLinus Torvalds 20597deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 20601da177e4SLinus Torvalds if (!skb) 20611da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 20621da177e4SLinus Torvalds 20631da177e4SLinus Torvalds info.in_skb = in_skb; 20641da177e4SLinus Torvalds info.out_skb = skb; 20651da177e4SLinus Torvalds info.nlmsg_seq = seq; 20661da177e4SLinus Torvalds info.nlmsg_flags = 0; 20671da177e4SLinus Torvalds 2068c2546372SMathias Krause err = dump_one_policy(xp, dir, 0, &info); 2069c2546372SMathias Krause if (err) { 20701da177e4SLinus Torvalds kfree_skb(skb); 2071c2546372SMathias Krause return ERR_PTR(err); 20721da177e4SLinus Torvalds } 20731da177e4SLinus Torvalds 20741da177e4SLinus Torvalds return skb; 20751da177e4SLinus Torvalds } 20761da177e4SLinus Torvalds 207788d0adb5SNicolas Dichtel static int xfrm_notify_userpolicy(struct net *net) 207888d0adb5SNicolas Dichtel { 207988d0adb5SNicolas Dichtel struct xfrm_userpolicy_default *up; 208088d0adb5SNicolas Dichtel int len = NLMSG_ALIGN(sizeof(*up)); 208188d0adb5SNicolas Dichtel struct nlmsghdr *nlh; 208288d0adb5SNicolas Dichtel struct sk_buff *skb; 208393ec1320SNicolas Dichtel int err; 208488d0adb5SNicolas Dichtel 208588d0adb5SNicolas Dichtel skb = nlmsg_new(len, GFP_ATOMIC); 208688d0adb5SNicolas Dichtel if (skb == NULL) 208788d0adb5SNicolas Dichtel return -ENOMEM; 208888d0adb5SNicolas Dichtel 208988d0adb5SNicolas Dichtel nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0); 209088d0adb5SNicolas Dichtel if (nlh == NULL) { 209188d0adb5SNicolas Dichtel kfree_skb(skb); 209288d0adb5SNicolas Dichtel return -EMSGSIZE; 209388d0adb5SNicolas Dichtel } 209488d0adb5SNicolas Dichtel 209588d0adb5SNicolas Dichtel up = nlmsg_data(nlh); 2096b58b1f56SNicolas Dichtel up->in = net->xfrm.policy_default[XFRM_POLICY_IN]; 2097b58b1f56SNicolas Dichtel up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD]; 2098b58b1f56SNicolas Dichtel up->out = net->xfrm.policy_default[XFRM_POLICY_OUT]; 209988d0adb5SNicolas Dichtel 210088d0adb5SNicolas Dichtel nlmsg_end(skb, nlh); 210188d0adb5SNicolas Dichtel 210293ec1320SNicolas Dichtel rcu_read_lock(); 210393ec1320SNicolas Dichtel err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 210493ec1320SNicolas Dichtel rcu_read_unlock(); 210593ec1320SNicolas Dichtel 210693ec1320SNicolas Dichtel return err; 210788d0adb5SNicolas Dichtel } 210888d0adb5SNicolas Dichtel 2109b58b1f56SNicolas Dichtel static bool xfrm_userpolicy_is_valid(__u8 policy) 2110b58b1f56SNicolas Dichtel { 2111b58b1f56SNicolas Dichtel return policy == XFRM_USERPOLICY_BLOCK || 2112b58b1f56SNicolas Dichtel policy == XFRM_USERPOLICY_ACCEPT; 2113b58b1f56SNicolas Dichtel } 2114b58b1f56SNicolas Dichtel 21152d151d39SSteffen Klassert static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh, 21163bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 21172d151d39SSteffen Klassert { 21182d151d39SSteffen Klassert struct net *net = sock_net(skb->sk); 21192d151d39SSteffen Klassert struct xfrm_userpolicy_default *up = nlmsg_data(nlh); 21202d151d39SSteffen Klassert 2121b58b1f56SNicolas Dichtel if (xfrm_userpolicy_is_valid(up->in)) 2122b58b1f56SNicolas Dichtel net->xfrm.policy_default[XFRM_POLICY_IN] = up->in; 21235d8dbb7fSPavel Skripkin 2124b58b1f56SNicolas Dichtel if (xfrm_userpolicy_is_valid(up->fwd)) 2125b58b1f56SNicolas Dichtel net->xfrm.policy_default[XFRM_POLICY_FWD] = up->fwd; 21265d8dbb7fSPavel Skripkin 2127b58b1f56SNicolas Dichtel if (xfrm_userpolicy_is_valid(up->out)) 2128b58b1f56SNicolas Dichtel net->xfrm.policy_default[XFRM_POLICY_OUT] = up->out; 21292d151d39SSteffen Klassert 21302d151d39SSteffen Klassert rt_genid_bump_all(net); 21312d151d39SSteffen Klassert 213288d0adb5SNicolas Dichtel xfrm_notify_userpolicy(net); 21332d151d39SSteffen Klassert return 0; 21342d151d39SSteffen Klassert } 21352d151d39SSteffen Klassert 21362d151d39SSteffen Klassert static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh, 21373bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 21382d151d39SSteffen Klassert { 21392d151d39SSteffen Klassert struct sk_buff *r_skb; 21402d151d39SSteffen Klassert struct nlmsghdr *r_nlh; 21412d151d39SSteffen Klassert struct net *net = sock_net(skb->sk); 2142f8d858e6SNicolas Dichtel struct xfrm_userpolicy_default *r_up; 21432d151d39SSteffen Klassert int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default)); 21442d151d39SSteffen Klassert u32 portid = NETLINK_CB(skb).portid; 21452d151d39SSteffen Klassert u32 seq = nlh->nlmsg_seq; 21462d151d39SSteffen Klassert 21472d151d39SSteffen Klassert r_skb = nlmsg_new(len, GFP_ATOMIC); 21482d151d39SSteffen Klassert if (!r_skb) 21492d151d39SSteffen Klassert return -ENOMEM; 21502d151d39SSteffen Klassert 21512d151d39SSteffen Klassert r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0); 21522d151d39SSteffen Klassert if (!r_nlh) { 21532d151d39SSteffen Klassert kfree_skb(r_skb); 21542d151d39SSteffen Klassert return -EMSGSIZE; 21552d151d39SSteffen Klassert } 21562d151d39SSteffen Klassert 21572d151d39SSteffen Klassert r_up = nlmsg_data(r_nlh); 2158b58b1f56SNicolas Dichtel r_up->in = net->xfrm.policy_default[XFRM_POLICY_IN]; 2159b58b1f56SNicolas Dichtel r_up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD]; 2160b58b1f56SNicolas Dichtel r_up->out = net->xfrm.policy_default[XFRM_POLICY_OUT]; 21612d151d39SSteffen Klassert nlmsg_end(r_skb, r_nlh); 21622d151d39SSteffen Klassert 21632d151d39SSteffen Klassert return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid); 21642d151d39SSteffen Klassert } 21652d151d39SSteffen Klassert 216622e70050SChristoph Hellwig static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 21673bec6c3eSSabrina Dubroca struct nlattr **attrs, 21683bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 21691da177e4SLinus Torvalds { 2170fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 21711da177e4SLinus Torvalds struct xfrm_policy *xp; 21721da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 2173b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 21741da177e4SLinus Torvalds int err; 217526b15dadSJamal Hadi Salim struct km_event c; 21761da177e4SLinus Torvalds int delete; 2177295fae56SJamal Hadi Salim struct xfrm_mark m; 21787e652640SSteffen Klassert u32 if_id = 0; 21791da177e4SLinus Torvalds 21807b67c857SThomas Graf p = nlmsg_data(nlh); 21811da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 21821da177e4SLinus Torvalds 2183fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 2184f7b6983fSMasahide NAKAMURA if (err) 2185f7b6983fSMasahide NAKAMURA return err; 2186f7b6983fSMasahide NAKAMURA 218724fc544fSSabrina Dubroca err = verify_policy_dir(p->dir, extack); 21881da177e4SLinus Torvalds if (err) 21891da177e4SLinus Torvalds return err; 21901da177e4SLinus Torvalds 21917e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 21927e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 21937e652640SSteffen Klassert 21944f47e8abSXin Long xfrm_mark_get(attrs, &m); 21954f47e8abSXin Long 21961da177e4SLinus Torvalds if (p->index) 21974f47e8abSXin Long xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, 21984f47e8abSXin Long p->index, delete, &err); 2199df71837dSTrent Jaeger else { 22005424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 220103e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 2202df71837dSTrent Jaeger 220308a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 2204df71837dSTrent Jaeger if (err) 2205df71837dSTrent Jaeger return err; 2206df71837dSTrent Jaeger 22072c8dd116SDenis V. Lunev ctx = NULL; 2208df71837dSTrent Jaeger if (rt) { 22095424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 2210df71837dSTrent Jaeger 221152a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 221203e1ad7bSPaul Moore if (err) 2213df71837dSTrent Jaeger return err; 22142c8dd116SDenis V. Lunev } 22154f47e8abSXin Long xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir, 22164f47e8abSXin Long &p->sel, ctx, delete, &err); 221703e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 2218df71837dSTrent Jaeger } 22191da177e4SLinus Torvalds if (xp == NULL) 22201da177e4SLinus Torvalds return -ENOENT; 22211da177e4SLinus Torvalds 22221da177e4SLinus Torvalds if (!delete) { 22231da177e4SLinus Torvalds struct sk_buff *resp_skb; 22241da177e4SLinus Torvalds 22251da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 22261da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 22271da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 22281da177e4SLinus Torvalds } else { 2229a6483b79SAlexey Dobriyan err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, 223015e47304SEric W. Biederman NETLINK_CB(skb).portid); 22311da177e4SLinus Torvalds } 223226b15dadSJamal Hadi Salim } else { 22332e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, err ? 0 : 1, true); 223413fcfbb0SDavid S. Miller 223513fcfbb0SDavid S. Miller if (err != 0) 2236c8c05a8eSCatherine Zhang goto out; 223713fcfbb0SDavid S. Miller 2238e7443892SHerbert Xu c.data.byid = p->index; 2239f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 224026b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 224115e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 224226b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 22431da177e4SLinus Torvalds } 22441da177e4SLinus Torvalds 2245c8c05a8eSCatherine Zhang out: 2246ef41aaa0SEric Paris xfrm_pol_put(xp); 22471da177e4SLinus Torvalds return err; 22481da177e4SLinus Torvalds } 22491da177e4SLinus Torvalds 225022e70050SChristoph Hellwig static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 22513bec6c3eSSabrina Dubroca struct nlattr **attrs, 22523bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 22531da177e4SLinus Torvalds { 2254fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 225526b15dadSJamal Hadi Salim struct km_event c; 22567b67c857SThomas Graf struct xfrm_usersa_flush *p = nlmsg_data(nlh); 22574aa2e62cSJoy Latten int err; 22581da177e4SLinus Torvalds 2259f75a2804SCong Wang err = xfrm_state_flush(net, p->proto, true, false); 22609e64cc95SJamal Hadi Salim if (err) { 22619e64cc95SJamal Hadi Salim if (err == -ESRCH) /* empty table */ 22629e64cc95SJamal Hadi Salim return 0; 2263069c474eSDavid S. Miller return err; 22649e64cc95SJamal Hadi Salim } 2265bf08867fSHerbert Xu c.data.proto = p->proto; 2266f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 226726b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 226815e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 22697067802eSAlexey Dobriyan c.net = net; 227026b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 227126b15dadSJamal Hadi Salim 22721da177e4SLinus Torvalds return 0; 22731da177e4SLinus Torvalds } 22741da177e4SLinus Torvalds 2275a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x) 22767deb2264SThomas Graf { 2277a1b831f2SAlexey Dobriyan unsigned int replay_size = x->replay_esn ? 2278d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn) : 2279d8647b79SSteffen Klassert sizeof(struct xfrm_replay_state); 2280d8647b79SSteffen Klassert 22817deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) 2282d8647b79SSteffen Klassert + nla_total_size(replay_size) 2283de95c4a4SNicolas Dichtel + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur)) 22846f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 22857deb2264SThomas Graf + nla_total_size(4) /* XFRM_AE_RTHR */ 22867deb2264SThomas Graf + nla_total_size(4); /* XFRM_AE_ETHR */ 22877deb2264SThomas Graf } 2288d51d081dSJamal Hadi Salim 2289214e005bSDavid S. Miller static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 2290d51d081dSJamal Hadi Salim { 2291d51d081dSJamal Hadi Salim struct xfrm_aevent_id *id; 2292d51d081dSJamal Hadi Salim struct nlmsghdr *nlh; 22931d1e34ddSDavid S. Miller int err; 2294d51d081dSJamal Hadi Salim 229515e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); 229679b8b7f4SThomas Graf if (nlh == NULL) 229779b8b7f4SThomas Graf return -EMSGSIZE; 2298d51d081dSJamal Hadi Salim 22997b67c857SThomas Graf id = nlmsg_data(nlh); 2300931e79d7SMathias Krause memset(&id->sa_id, 0, sizeof(id->sa_id)); 23012b5f6dccSJamal Hadi Salim memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); 2302d51d081dSJamal Hadi Salim id->sa_id.spi = x->id.spi; 2303d51d081dSJamal Hadi Salim id->sa_id.family = x->props.family; 2304d51d081dSJamal Hadi Salim id->sa_id.proto = x->id.proto; 23052b5f6dccSJamal Hadi Salim memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); 23062b5f6dccSJamal Hadi Salim id->reqid = x->props.reqid; 2307d51d081dSJamal Hadi Salim id->flags = c->data.aevent; 2308d51d081dSJamal Hadi Salim 2309d0fde795SDavid S. Miller if (x->replay_esn) { 23101d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 2311d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 23121d1e34ddSDavid S. Miller x->replay_esn); 2313d0fde795SDavid S. Miller } else { 23141d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 23151d1e34ddSDavid S. Miller &x->replay); 2316d0fde795SDavid S. Miller } 23171d1e34ddSDavid S. Miller if (err) 23181d1e34ddSDavid S. Miller goto out_cancel; 2319de95c4a4SNicolas Dichtel err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft, 2320de95c4a4SNicolas Dichtel XFRMA_PAD); 23211d1e34ddSDavid S. Miller if (err) 23221d1e34ddSDavid S. Miller goto out_cancel; 2323d8647b79SSteffen Klassert 23241d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_RTHR) { 23251d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); 23261d1e34ddSDavid S. Miller if (err) 23271d1e34ddSDavid S. Miller goto out_cancel; 23281d1e34ddSDavid S. Miller } 23291d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_ETHR) { 23301d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, 23311d1e34ddSDavid S. Miller x->replay_maxage * 10 / HZ); 23321d1e34ddSDavid S. Miller if (err) 23331d1e34ddSDavid S. Miller goto out_cancel; 23341d1e34ddSDavid S. Miller } 23351d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 23361d1e34ddSDavid S. Miller if (err) 23371d1e34ddSDavid S. Miller goto out_cancel; 23386f26b61eSJamal Hadi Salim 23397e652640SSteffen Klassert err = xfrm_if_id_put(skb, x->if_id); 23407e652640SSteffen Klassert if (err) 23417e652640SSteffen Klassert goto out_cancel; 23427e652640SSteffen Klassert 2343053c095aSJohannes Berg nlmsg_end(skb, nlh); 2344053c095aSJohannes Berg return 0; 2345d51d081dSJamal Hadi Salim 23461d1e34ddSDavid S. Miller out_cancel: 23479825069dSThomas Graf nlmsg_cancel(skb, nlh); 23481d1e34ddSDavid S. Miller return err; 2349d51d081dSJamal Hadi Salim } 2350d51d081dSJamal Hadi Salim 235122e70050SChristoph Hellwig static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 23523bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 2353d51d081dSJamal Hadi Salim { 2354fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2355d51d081dSJamal Hadi Salim struct xfrm_state *x; 2356d51d081dSJamal Hadi Salim struct sk_buff *r_skb; 2357d51d081dSJamal Hadi Salim int err; 2358d51d081dSJamal Hadi Salim struct km_event c; 23596f26b61eSJamal Hadi Salim u32 mark; 23606f26b61eSJamal Hadi Salim struct xfrm_mark m; 23617b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 2362d51d081dSJamal Hadi Salim struct xfrm_usersa_id *id = &p->sa_id; 2363d51d081dSJamal Hadi Salim 23646f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 23656f26b61eSJamal Hadi Salim 23666f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); 2367d8647b79SSteffen Klassert if (x == NULL) 2368d51d081dSJamal Hadi Salim return -ESRCH; 2369d8647b79SSteffen Klassert 2370d8647b79SSteffen Klassert r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 2371d8647b79SSteffen Klassert if (r_skb == NULL) { 2372d8647b79SSteffen Klassert xfrm_state_put(x); 2373d8647b79SSteffen Klassert return -ENOMEM; 2374d51d081dSJamal Hadi Salim } 2375d51d081dSJamal Hadi Salim 2376d51d081dSJamal Hadi Salim /* 2377d51d081dSJamal Hadi Salim * XXX: is this lock really needed - none of the other 2378d51d081dSJamal Hadi Salim * gets lock (the concern is things getting updated 2379d51d081dSJamal Hadi Salim * while we are still reading) - jhs 2380d51d081dSJamal Hadi Salim */ 2381d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 2382d51d081dSJamal Hadi Salim c.data.aevent = p->flags; 2383d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 238415e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 2385d51d081dSJamal Hadi Salim 23862fc5f83bSGustavo A. R. Silva err = build_aevent(r_skb, x, &c); 23872fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 23882fc5f83bSGustavo A. R. Silva 238915e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); 2390d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 2391d51d081dSJamal Hadi Salim xfrm_state_put(x); 2392d51d081dSJamal Hadi Salim return err; 2393d51d081dSJamal Hadi Salim } 2394d51d081dSJamal Hadi Salim 239522e70050SChristoph Hellwig static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 23963bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 2397d51d081dSJamal Hadi Salim { 2398fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2399d51d081dSJamal Hadi Salim struct xfrm_state *x; 2400d51d081dSJamal Hadi Salim struct km_event c; 2401d51d081dSJamal Hadi Salim int err = -EINVAL; 24026f26b61eSJamal Hadi Salim u32 mark = 0; 24036f26b61eSJamal Hadi Salim struct xfrm_mark m; 24047b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 24055424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 2406d8647b79SSteffen Klassert struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; 24075424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 24084e077237SMichael Rossberg struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 24094e077237SMichael Rossberg struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 2410d51d081dSJamal Hadi Salim 24114e077237SMichael Rossberg if (!lt && !rp && !re && !et && !rt) 2412d51d081dSJamal Hadi Salim return err; 2413d51d081dSJamal Hadi Salim 2414d51d081dSJamal Hadi Salim /* pedantic mode - thou shalt sayeth replaceth */ 2415d51d081dSJamal Hadi Salim if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) 2416d51d081dSJamal Hadi Salim return err; 2417d51d081dSJamal Hadi Salim 24186f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 24196f26b61eSJamal Hadi Salim 24206f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); 2421d51d081dSJamal Hadi Salim if (x == NULL) 2422d51d081dSJamal Hadi Salim return -ESRCH; 2423d51d081dSJamal Hadi Salim 2424d51d081dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 2425d51d081dSJamal Hadi Salim goto out; 2426d51d081dSJamal Hadi Salim 24274479ff76SSteffen Klassert err = xfrm_replay_verify_len(x->replay_esn, re); 2428e2b19125SSteffen Klassert if (err) 2429e2b19125SSteffen Klassert goto out; 2430e2b19125SSteffen Klassert 2431d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 2432e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 1); 2433d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 2434d51d081dSJamal Hadi Salim 2435d51d081dSJamal Hadi Salim c.event = nlh->nlmsg_type; 2436d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 243715e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 2438d51d081dSJamal Hadi Salim c.data.aevent = XFRM_AE_CU; 2439d51d081dSJamal Hadi Salim km_state_notify(x, &c); 2440d51d081dSJamal Hadi Salim err = 0; 2441d51d081dSJamal Hadi Salim out: 2442d51d081dSJamal Hadi Salim xfrm_state_put(x); 2443d51d081dSJamal Hadi Salim return err; 2444d51d081dSJamal Hadi Salim } 2445d51d081dSJamal Hadi Salim 244622e70050SChristoph Hellwig static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 24473bec6c3eSSabrina Dubroca struct nlattr **attrs, 24483bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 24491da177e4SLinus Torvalds { 2450fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 245126b15dadSJamal Hadi Salim struct km_event c; 2452b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 2453f7b6983fSMasahide NAKAMURA int err; 245426b15dadSJamal Hadi Salim 2455fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 2456f7b6983fSMasahide NAKAMURA if (err) 2457f7b6983fSMasahide NAKAMURA return err; 2458f7b6983fSMasahide NAKAMURA 24592e71029eSTetsuo Handa err = xfrm_policy_flush(net, type, true); 24602f1eb65fSJamal Hadi Salim if (err) { 24612f1eb65fSJamal Hadi Salim if (err == -ESRCH) /* empty table */ 24622f1eb65fSJamal Hadi Salim return 0; 2463069c474eSDavid S. Miller return err; 24642f1eb65fSJamal Hadi Salim } 24652f1eb65fSJamal Hadi Salim 2466f7b6983fSMasahide NAKAMURA c.data.type = type; 2467f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 246826b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 246915e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 24707067802eSAlexey Dobriyan c.net = net; 247126b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 24721da177e4SLinus Torvalds return 0; 24731da177e4SLinus Torvalds } 24741da177e4SLinus Torvalds 247522e70050SChristoph Hellwig static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 24763bec6c3eSSabrina Dubroca struct nlattr **attrs, 24773bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 24786c5c8ca7SJamal Hadi Salim { 2479fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 24806c5c8ca7SJamal Hadi Salim struct xfrm_policy *xp; 24817b67c857SThomas Graf struct xfrm_user_polexpire *up = nlmsg_data(nlh); 24826c5c8ca7SJamal Hadi Salim struct xfrm_userpolicy_info *p = &up->pol; 2483b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 24846c5c8ca7SJamal Hadi Salim int err = -ENOENT; 2485295fae56SJamal Hadi Salim struct xfrm_mark m; 24867e652640SSteffen Klassert u32 if_id = 0; 24876c5c8ca7SJamal Hadi Salim 2488fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 2489f7b6983fSMasahide NAKAMURA if (err) 2490f7b6983fSMasahide NAKAMURA return err; 2491f7b6983fSMasahide NAKAMURA 249224fc544fSSabrina Dubroca err = verify_policy_dir(p->dir, extack); 2493c8bf4d04STimo Teräs if (err) 2494c8bf4d04STimo Teräs return err; 2495c8bf4d04STimo Teräs 24967e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 24977e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 24987e652640SSteffen Klassert 24994f47e8abSXin Long xfrm_mark_get(attrs, &m); 25004f47e8abSXin Long 25016c5c8ca7SJamal Hadi Salim if (p->index) 25024f47e8abSXin Long xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index, 25034f47e8abSXin Long 0, &err); 25046c5c8ca7SJamal Hadi Salim else { 25055424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 250603e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 25076c5c8ca7SJamal Hadi Salim 250808a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 25096c5c8ca7SJamal Hadi Salim if (err) 25106c5c8ca7SJamal Hadi Salim return err; 25116c5c8ca7SJamal Hadi Salim 25122c8dd116SDenis V. Lunev ctx = NULL; 25136c5c8ca7SJamal Hadi Salim if (rt) { 25145424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 25156c5c8ca7SJamal Hadi Salim 251652a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 251703e1ad7bSPaul Moore if (err) 25186c5c8ca7SJamal Hadi Salim return err; 25192c8dd116SDenis V. Lunev } 25204f47e8abSXin Long xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir, 25216f26b61eSJamal Hadi Salim &p->sel, ctx, 0, &err); 252203e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 25236c5c8ca7SJamal Hadi Salim } 25246c5c8ca7SJamal Hadi Salim if (xp == NULL) 2525ef41aaa0SEric Paris return -ENOENT; 252603e1ad7bSPaul Moore 2527ea2dea9dSTimo Teräs if (unlikely(xp->walk.dead)) 25286c5c8ca7SJamal Hadi Salim goto out; 25296c5c8ca7SJamal Hadi Salim 25306c5c8ca7SJamal Hadi Salim err = 0; 25316c5c8ca7SJamal Hadi Salim if (up->hard) { 25326c5c8ca7SJamal Hadi Salim xfrm_policy_delete(xp, p->dir); 25332e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, 1, true); 25346c5c8ca7SJamal Hadi Salim } 2535c6bb8136SEric W. Biederman km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); 25366c5c8ca7SJamal Hadi Salim 25376c5c8ca7SJamal Hadi Salim out: 25386c5c8ca7SJamal Hadi Salim xfrm_pol_put(xp); 25396c5c8ca7SJamal Hadi Salim return err; 25406c5c8ca7SJamal Hadi Salim } 25416c5c8ca7SJamal Hadi Salim 254222e70050SChristoph Hellwig static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 25433bec6c3eSSabrina Dubroca struct nlattr **attrs, 25443bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 254553bc6b4dSJamal Hadi Salim { 2546fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 254753bc6b4dSJamal Hadi Salim struct xfrm_state *x; 254853bc6b4dSJamal Hadi Salim int err; 25497b67c857SThomas Graf struct xfrm_user_expire *ue = nlmsg_data(nlh); 255053bc6b4dSJamal Hadi Salim struct xfrm_usersa_info *p = &ue->state; 25516f26b61eSJamal Hadi Salim struct xfrm_mark m; 2552928497f0SNicolas Dichtel u32 mark = xfrm_mark_get(attrs, &m); 255353bc6b4dSJamal Hadi Salim 25546f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); 255553bc6b4dSJamal Hadi Salim 25563a765aa5SDavid S. Miller err = -ENOENT; 255753bc6b4dSJamal Hadi Salim if (x == NULL) 255853bc6b4dSJamal Hadi Salim return err; 255953bc6b4dSJamal Hadi Salim 256053bc6b4dSJamal Hadi Salim spin_lock_bh(&x->lock); 25613a765aa5SDavid S. Miller err = -EINVAL; 256253bc6b4dSJamal Hadi Salim if (x->km.state != XFRM_STATE_VALID) 256353bc6b4dSJamal Hadi Salim goto out; 2564c6bb8136SEric W. Biederman km_state_expired(x, ue->hard, nlh->nlmsg_pid); 256553bc6b4dSJamal Hadi Salim 2566161a09e7SJoy Latten if (ue->hard) { 256753bc6b4dSJamal Hadi Salim __xfrm_state_delete(x); 25682e71029eSTetsuo Handa xfrm_audit_state_delete(x, 1, true); 2569161a09e7SJoy Latten } 25703a765aa5SDavid S. Miller err = 0; 257153bc6b4dSJamal Hadi Salim out: 257253bc6b4dSJamal Hadi Salim spin_unlock_bh(&x->lock); 257353bc6b4dSJamal Hadi Salim xfrm_state_put(x); 257453bc6b4dSJamal Hadi Salim return err; 257553bc6b4dSJamal Hadi Salim } 257653bc6b4dSJamal Hadi Salim 257722e70050SChristoph Hellwig static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, 25783bec6c3eSSabrina Dubroca struct nlattr **attrs, 25793bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 2580980ebd25SJamal Hadi Salim { 2581fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2582980ebd25SJamal Hadi Salim struct xfrm_policy *xp; 2583980ebd25SJamal Hadi Salim struct xfrm_user_tmpl *ut; 2584980ebd25SJamal Hadi Salim int i; 25855424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 25866f26b61eSJamal Hadi Salim struct xfrm_mark mark; 2587980ebd25SJamal Hadi Salim 25887b67c857SThomas Graf struct xfrm_user_acquire *ua = nlmsg_data(nlh); 2589fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 2590980ebd25SJamal Hadi Salim int err = -ENOMEM; 2591980ebd25SJamal Hadi Salim 2592980ebd25SJamal Hadi Salim if (!x) 2593d8eb9307SIlpo Järvinen goto nomem; 2594980ebd25SJamal Hadi Salim 25956f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &mark); 25966f26b61eSJamal Hadi Salim 2597ec2b4f01SSabrina Dubroca err = verify_newpolicy_info(&ua->policy, extack); 2598d8eb9307SIlpo Järvinen if (err) 259973efc324SVegard Nossum goto free_state; 260008a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 2601a1a7e3a3SXin Long if (err) 2602a1a7e3a3SXin Long goto free_state; 2603980ebd25SJamal Hadi Salim 2604980ebd25SJamal Hadi Salim /* build an XP */ 2605fb7deabaSSabrina Dubroca xp = xfrm_policy_construct(net, &ua->policy, attrs, &err, extack); 2606d8eb9307SIlpo Järvinen if (!xp) 2607d8eb9307SIlpo Järvinen goto free_state; 2608980ebd25SJamal Hadi Salim 2609980ebd25SJamal Hadi Salim memcpy(&x->id, &ua->id, sizeof(ua->id)); 2610980ebd25SJamal Hadi Salim memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); 2611980ebd25SJamal Hadi Salim memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); 26126f26b61eSJamal Hadi Salim xp->mark.m = x->mark.m = mark.m; 26136f26b61eSJamal Hadi Salim xp->mark.v = x->mark.v = mark.v; 26145424f32eSThomas Graf ut = nla_data(rt); 2615980ebd25SJamal Hadi Salim /* extract the templates and for each call km_key */ 2616980ebd25SJamal Hadi Salim for (i = 0; i < xp->xfrm_nr; i++, ut++) { 2617980ebd25SJamal Hadi Salim struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 2618980ebd25SJamal Hadi Salim memcpy(&x->id, &t->id, sizeof(x->id)); 2619980ebd25SJamal Hadi Salim x->props.mode = t->mode; 2620980ebd25SJamal Hadi Salim x->props.reqid = t->reqid; 2621980ebd25SJamal Hadi Salim x->props.family = ut->family; 2622980ebd25SJamal Hadi Salim t->aalgos = ua->aalgos; 2623980ebd25SJamal Hadi Salim t->ealgos = ua->ealgos; 2624980ebd25SJamal Hadi Salim t->calgos = ua->calgos; 2625980ebd25SJamal Hadi Salim err = km_query(x, t, xp); 2626980ebd25SJamal Hadi Salim 2627980ebd25SJamal Hadi Salim } 2628980ebd25SJamal Hadi Salim 26294a135e53SMathias Krause xfrm_state_free(x); 2630980ebd25SJamal Hadi Salim kfree(xp); 2631980ebd25SJamal Hadi Salim 2632980ebd25SJamal Hadi Salim return 0; 2633d8eb9307SIlpo Järvinen 2634d8eb9307SIlpo Järvinen free_state: 26354a135e53SMathias Krause xfrm_state_free(x); 2636d8eb9307SIlpo Järvinen nomem: 2637d8eb9307SIlpo Järvinen return err; 2638980ebd25SJamal Hadi Salim } 2639980ebd25SJamal Hadi Salim 26405c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 26415c79de6eSShinta Sugimoto static int copy_from_user_migrate(struct xfrm_migrate *ma, 264213c1d189SArnaud Ebalard struct xfrm_kmaddress *k, 26435424f32eSThomas Graf struct nlattr **attrs, int *num) 26445c79de6eSShinta Sugimoto { 26455424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_MIGRATE]; 26465c79de6eSShinta Sugimoto struct xfrm_user_migrate *um; 26475c79de6eSShinta Sugimoto int i, num_migrate; 26485c79de6eSShinta Sugimoto 264913c1d189SArnaud Ebalard if (k != NULL) { 265013c1d189SArnaud Ebalard struct xfrm_user_kmaddress *uk; 265113c1d189SArnaud Ebalard 265213c1d189SArnaud Ebalard uk = nla_data(attrs[XFRMA_KMADDRESS]); 265313c1d189SArnaud Ebalard memcpy(&k->local, &uk->local, sizeof(k->local)); 265413c1d189SArnaud Ebalard memcpy(&k->remote, &uk->remote, sizeof(k->remote)); 265513c1d189SArnaud Ebalard k->family = uk->family; 265613c1d189SArnaud Ebalard k->reserved = uk->reserved; 265713c1d189SArnaud Ebalard } 265813c1d189SArnaud Ebalard 26595424f32eSThomas Graf um = nla_data(rt); 26605424f32eSThomas Graf num_migrate = nla_len(rt) / sizeof(*um); 26615c79de6eSShinta Sugimoto 26625c79de6eSShinta Sugimoto if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) 26635c79de6eSShinta Sugimoto return -EINVAL; 26645c79de6eSShinta Sugimoto 26655c79de6eSShinta Sugimoto for (i = 0; i < num_migrate; i++, um++, ma++) { 26665c79de6eSShinta Sugimoto memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); 26675c79de6eSShinta Sugimoto memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); 26685c79de6eSShinta Sugimoto memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); 26695c79de6eSShinta Sugimoto memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); 26705c79de6eSShinta Sugimoto 26715c79de6eSShinta Sugimoto ma->proto = um->proto; 26725c79de6eSShinta Sugimoto ma->mode = um->mode; 26735c79de6eSShinta Sugimoto ma->reqid = um->reqid; 26745c79de6eSShinta Sugimoto 26755c79de6eSShinta Sugimoto ma->old_family = um->old_family; 26765c79de6eSShinta Sugimoto ma->new_family = um->new_family; 26775c79de6eSShinta Sugimoto } 26785c79de6eSShinta Sugimoto 26795c79de6eSShinta Sugimoto *num = i; 26805c79de6eSShinta Sugimoto return 0; 26815c79de6eSShinta Sugimoto } 26825c79de6eSShinta Sugimoto 26835c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 26843bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 26855c79de6eSShinta Sugimoto { 26867b67c857SThomas Graf struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); 26875c79de6eSShinta Sugimoto struct xfrm_migrate m[XFRM_MAX_DEPTH]; 268813c1d189SArnaud Ebalard struct xfrm_kmaddress km, *kmp; 26895c79de6eSShinta Sugimoto u8 type; 26905c79de6eSShinta Sugimoto int err; 26915c79de6eSShinta Sugimoto int n = 0; 26928d549c4fSFan Du struct net *net = sock_net(skb->sk); 26934ab47d47SAntony Antony struct xfrm_encap_tmpl *encap = NULL; 2694c1aca308SYan Yan u32 if_id = 0; 26955c79de6eSShinta Sugimoto 269635a7aa08SThomas Graf if (attrs[XFRMA_MIGRATE] == NULL) 2697cf5cb79fSThomas Graf return -EINVAL; 26985c79de6eSShinta Sugimoto 269913c1d189SArnaud Ebalard kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; 270013c1d189SArnaud Ebalard 2701fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 27025c79de6eSShinta Sugimoto if (err) 27035c79de6eSShinta Sugimoto return err; 27045c79de6eSShinta Sugimoto 270513c1d189SArnaud Ebalard err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); 27065c79de6eSShinta Sugimoto if (err) 27075c79de6eSShinta Sugimoto return err; 27085c79de6eSShinta Sugimoto 27095c79de6eSShinta Sugimoto if (!n) 27105c79de6eSShinta Sugimoto return 0; 27115c79de6eSShinta Sugimoto 27124ab47d47SAntony Antony if (attrs[XFRMA_ENCAP]) { 27134ab47d47SAntony Antony encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 27144ab47d47SAntony Antony sizeof(*encap), GFP_KERNEL); 27154ab47d47SAntony Antony if (!encap) 27164ac7a6eeSZheng Yongjun return -ENOMEM; 27175c79de6eSShinta Sugimoto } 27184ab47d47SAntony Antony 2719c1aca308SYan Yan if (attrs[XFRMA_IF_ID]) 2720c1aca308SYan Yan if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 2721c1aca308SYan Yan 2722c1aca308SYan Yan err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap, if_id); 27234ab47d47SAntony Antony 27244ab47d47SAntony Antony kfree(encap); 27254ab47d47SAntony Antony 27264ab47d47SAntony Antony return err; 27274ab47d47SAntony Antony } 27285c79de6eSShinta Sugimoto #else 27295c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 27303bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 27315c79de6eSShinta Sugimoto { 27325c79de6eSShinta Sugimoto return -ENOPROTOOPT; 27335c79de6eSShinta Sugimoto } 27345c79de6eSShinta Sugimoto #endif 27355c79de6eSShinta Sugimoto 27365c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 2737183cad12SDavid S. Miller static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) 27385c79de6eSShinta Sugimoto { 27395c79de6eSShinta Sugimoto struct xfrm_user_migrate um; 27405c79de6eSShinta Sugimoto 27415c79de6eSShinta Sugimoto memset(&um, 0, sizeof(um)); 27425c79de6eSShinta Sugimoto um.proto = m->proto; 27435c79de6eSShinta Sugimoto um.mode = m->mode; 27445c79de6eSShinta Sugimoto um.reqid = m->reqid; 27455c79de6eSShinta Sugimoto um.old_family = m->old_family; 27465c79de6eSShinta Sugimoto memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); 27475c79de6eSShinta Sugimoto memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); 27485c79de6eSShinta Sugimoto um.new_family = m->new_family; 27495c79de6eSShinta Sugimoto memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); 27505c79de6eSShinta Sugimoto memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); 27515c79de6eSShinta Sugimoto 2752c0144beaSThomas Graf return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); 27535c79de6eSShinta Sugimoto } 27545c79de6eSShinta Sugimoto 2755183cad12SDavid S. Miller static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) 275613c1d189SArnaud Ebalard { 275713c1d189SArnaud Ebalard struct xfrm_user_kmaddress uk; 275813c1d189SArnaud Ebalard 275913c1d189SArnaud Ebalard memset(&uk, 0, sizeof(uk)); 276013c1d189SArnaud Ebalard uk.family = k->family; 276113c1d189SArnaud Ebalard uk.reserved = k->reserved; 276213c1d189SArnaud Ebalard memcpy(&uk.local, &k->local, sizeof(uk.local)); 2763a1caa322SArnaud Ebalard memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); 276413c1d189SArnaud Ebalard 276513c1d189SArnaud Ebalard return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); 276613c1d189SArnaud Ebalard } 276713c1d189SArnaud Ebalard 2768a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma, 27698bafd730SAntony Antony int with_encp) 27707deb2264SThomas Graf { 27717deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) 277213c1d189SArnaud Ebalard + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) 27738bafd730SAntony Antony + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0) 27747deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) 27757deb2264SThomas Graf + userpolicy_type_attrsize(); 27767deb2264SThomas Graf } 27777deb2264SThomas Graf 2778183cad12SDavid S. Miller static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, 2779183cad12SDavid S. Miller int num_migrate, const struct xfrm_kmaddress *k, 27808bafd730SAntony Antony const struct xfrm_selector *sel, 27818bafd730SAntony Antony const struct xfrm_encap_tmpl *encap, u8 dir, u8 type) 27825c79de6eSShinta Sugimoto { 2783183cad12SDavid S. Miller const struct xfrm_migrate *mp; 27845c79de6eSShinta Sugimoto struct xfrm_userpolicy_id *pol_id; 27855c79de6eSShinta Sugimoto struct nlmsghdr *nlh; 27861d1e34ddSDavid S. Miller int i, err; 27875c79de6eSShinta Sugimoto 278879b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); 278979b8b7f4SThomas Graf if (nlh == NULL) 279079b8b7f4SThomas Graf return -EMSGSIZE; 27915c79de6eSShinta Sugimoto 27927b67c857SThomas Graf pol_id = nlmsg_data(nlh); 27935c79de6eSShinta Sugimoto /* copy data from selector, dir, and type to the pol_id */ 27945c79de6eSShinta Sugimoto memset(pol_id, 0, sizeof(*pol_id)); 27955c79de6eSShinta Sugimoto memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); 27965c79de6eSShinta Sugimoto pol_id->dir = dir; 27975c79de6eSShinta Sugimoto 27981d1e34ddSDavid S. Miller if (k != NULL) { 27991d1e34ddSDavid S. Miller err = copy_to_user_kmaddress(k, skb); 28001d1e34ddSDavid S. Miller if (err) 28011d1e34ddSDavid S. Miller goto out_cancel; 28021d1e34ddSDavid S. Miller } 28038bafd730SAntony Antony if (encap) { 28048bafd730SAntony Antony err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap); 28058bafd730SAntony Antony if (err) 28068bafd730SAntony Antony goto out_cancel; 28078bafd730SAntony Antony } 28081d1e34ddSDavid S. Miller err = copy_to_user_policy_type(type, skb); 28091d1e34ddSDavid S. Miller if (err) 28101d1e34ddSDavid S. Miller goto out_cancel; 28115c79de6eSShinta Sugimoto for (i = 0, mp = m ; i < num_migrate; i++, mp++) { 28121d1e34ddSDavid S. Miller err = copy_to_user_migrate(mp, skb); 28131d1e34ddSDavid S. Miller if (err) 28141d1e34ddSDavid S. Miller goto out_cancel; 28155c79de6eSShinta Sugimoto } 28165c79de6eSShinta Sugimoto 2817053c095aSJohannes Berg nlmsg_end(skb, nlh); 2818053c095aSJohannes Berg return 0; 28191d1e34ddSDavid S. Miller 28201d1e34ddSDavid S. Miller out_cancel: 28219825069dSThomas Graf nlmsg_cancel(skb, nlh); 28221d1e34ddSDavid S. Miller return err; 28235c79de6eSShinta Sugimoto } 28245c79de6eSShinta Sugimoto 2825183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2826183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 28278bafd730SAntony Antony const struct xfrm_kmaddress *k, 28288bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 28295c79de6eSShinta Sugimoto { 2830a6483b79SAlexey Dobriyan struct net *net = &init_net; 28315c79de6eSShinta Sugimoto struct sk_buff *skb; 28322fc5f83bSGustavo A. R. Silva int err; 28335c79de6eSShinta Sugimoto 28348bafd730SAntony Antony skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap), 28358bafd730SAntony Antony GFP_ATOMIC); 28365c79de6eSShinta Sugimoto if (skb == NULL) 28375c79de6eSShinta Sugimoto return -ENOMEM; 28385c79de6eSShinta Sugimoto 28395c79de6eSShinta Sugimoto /* build migrate */ 28402fc5f83bSGustavo A. R. Silva err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type); 28412fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 28425c79de6eSShinta Sugimoto 284321ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); 28445c79de6eSShinta Sugimoto } 28455c79de6eSShinta Sugimoto #else 2846183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2847183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 28488bafd730SAntony Antony const struct xfrm_kmaddress *k, 28498bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 28505c79de6eSShinta Sugimoto { 28515c79de6eSShinta Sugimoto return -ENOPROTOOPT; 28525c79de6eSShinta Sugimoto } 28535c79de6eSShinta Sugimoto #endif 2854d51d081dSJamal Hadi Salim 2855a7bd9a45SThomas Graf #define XMSGSIZE(type) sizeof(struct type) 2856492b558bSThomas Graf 28575461fc0cSDmitry Safonov const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 285866f9a259SDavid S. Miller [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 2859492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2860492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2861492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 2862492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2863492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2864492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 2865980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 286653bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 2867492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 286866f9a259SDavid S. Miller [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 28696c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 2870492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 2871a7bd9a45SThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, 2872d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 2873d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 287497a64b45SMasahide NAKAMURA [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), 28755c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2876a7bd9a45SThomas Graf [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), 2877880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 2878a7bd9a45SThomas Graf [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 28792d151d39SSteffen Klassert [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default), 28802d151d39SSteffen Klassert [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default), 28811da177e4SLinus Torvalds }; 28825461fc0cSDmitry Safonov EXPORT_SYMBOL_GPL(xfrm_msg_min); 28831da177e4SLinus Torvalds 2884492b558bSThomas Graf #undef XMSGSIZE 2885492b558bSThomas Graf 28865106f4a8SDmitry Safonov const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { 2887c28e9304Sjamal [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, 2888c28e9304Sjamal [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, 2889c28e9304Sjamal [XFRMA_LASTUSED] = { .type = NLA_U64}, 2890c28e9304Sjamal [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, 28911a6509d9SHerbert Xu [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, 2892cf5cb79fSThomas Graf [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, 2893cf5cb79fSThomas Graf [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, 2894cf5cb79fSThomas Graf [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, 2895cf5cb79fSThomas Graf [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, 2896cf5cb79fSThomas Graf [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, 2897cf5cb79fSThomas Graf [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, 2898cf5cb79fSThomas Graf [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, 2899cf5cb79fSThomas Graf [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, 2900cf5cb79fSThomas Graf [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, 2901cf5cb79fSThomas Graf [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, 2902cf5cb79fSThomas Graf [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, 2903cf5cb79fSThomas Graf [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, 2904cf5cb79fSThomas Graf [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, 2905cf5cb79fSThomas Graf [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, 290613c1d189SArnaud Ebalard [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, 29076f26b61eSJamal Hadi Salim [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, 290835d2856bSMartin Willi [XFRMA_TFCPAD] = { .type = NLA_U32 }, 2909d8647b79SSteffen Klassert [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, 2910a947b0a9SNicolas Dichtel [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, 2911d3623099SNicolas Dichtel [XFRMA_PROTO] = { .type = NLA_U8 }, 2912870a2df4SNicolas Dichtel [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, 2913d77e38e6SSteffen Klassert [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) }, 29149b42c1f1SSteffen Klassert [XFRMA_SET_MARK] = { .type = NLA_U32 }, 29159b42c1f1SSteffen Klassert [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 }, 29167e652640SSteffen Klassert [XFRMA_IF_ID] = { .type = NLA_U32 }, 2917cf5cb79fSThomas Graf }; 29185106f4a8SDmitry Safonov EXPORT_SYMBOL_GPL(xfrma_policy); 2919cf5cb79fSThomas Graf 2920880a6fabSChristophe Gouault static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { 2921880a6fabSChristophe Gouault [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 2922880a6fabSChristophe Gouault [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 2923880a6fabSChristophe Gouault }; 2924880a6fabSChristophe Gouault 292505600a79SMathias Krause static const struct xfrm_link { 29263bec6c3eSSabrina Dubroca int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **, 29273bec6c3eSSabrina Dubroca struct netlink_ext_ack *); 29281137b5e2SHerbert Xu int (*start)(struct netlink_callback *); 29291da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 29304c563f76STimo Teras int (*done)(struct netlink_callback *); 2931880a6fabSChristophe Gouault const struct nla_policy *nla_pol; 2932880a6fabSChristophe Gouault int nla_max; 2933492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 2934492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 2935492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 2936492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 29374c563f76STimo Teras .dump = xfrm_dump_sa, 29384c563f76STimo Teras .done = xfrm_dump_sa_done }, 2939492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 2940492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 2941492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 29421137b5e2SHerbert Xu .start = xfrm_dump_policy_start, 29434c563f76STimo Teras .dump = xfrm_dump_policy, 29444c563f76STimo Teras .done = xfrm_dump_policy_done }, 2945492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 2946980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, 294753bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, 2948492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 2949492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 29506c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, 2951492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 2952492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 2953d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, 2954d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, 29555c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, 295628d8909bSJamal Hadi Salim [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, 2957880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, 2958880a6fabSChristophe Gouault .nla_pol = xfrma_spd_policy, 2959880a6fabSChristophe Gouault .nla_max = XFRMA_SPD_MAX }, 2960ecfd6b18SJamal Hadi Salim [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, 29612d151d39SSteffen Klassert [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default }, 29622d151d39SSteffen Klassert [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default }, 29631da177e4SLinus Torvalds }; 29641da177e4SLinus Torvalds 29652d4bc933SJohannes Berg static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 29662d4bc933SJohannes Berg struct netlink_ext_ack *extack) 29671da177e4SLinus Torvalds { 2968a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 296935a7aa08SThomas Graf struct nlattr *attrs[XFRMA_MAX+1]; 297005600a79SMathias Krause const struct xfrm_link *link; 29715106f4a8SDmitry Safonov struct nlmsghdr *nlh64 = NULL; 2972a7bd9a45SThomas Graf int type, err; 29731da177e4SLinus Torvalds 29741da177e4SLinus Torvalds type = nlh->nlmsg_type; 29751da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 29761d00a4ebSThomas Graf return -EINVAL; 29771da177e4SLinus Torvalds 29781da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 29791da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 29801da177e4SLinus Torvalds 29811da177e4SLinus Torvalds /* All operations require privileges, even GET */ 298290f62cf3SEric W. Biederman if (!netlink_net_capable(skb, CAP_NET_ADMIN)) 29831d00a4ebSThomas Graf return -EPERM; 29841da177e4SLinus Torvalds 29855106f4a8SDmitry Safonov if (in_compat_syscall()) { 29865106f4a8SDmitry Safonov struct xfrm_translator *xtr = xfrm_get_translator(); 29875106f4a8SDmitry Safonov 29885106f4a8SDmitry Safonov if (!xtr) 29895106f4a8SDmitry Safonov return -EOPNOTSUPP; 29905106f4a8SDmitry Safonov 29915106f4a8SDmitry Safonov nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max, 29925106f4a8SDmitry Safonov link->nla_pol, extack); 29935106f4a8SDmitry Safonov xfrm_put_translator(xtr); 29945106f4a8SDmitry Safonov if (IS_ERR(nlh64)) 29955106f4a8SDmitry Safonov return PTR_ERR(nlh64); 29965106f4a8SDmitry Safonov if (nlh64) 29975106f4a8SDmitry Safonov nlh = nlh64; 29985106f4a8SDmitry Safonov } 29995106f4a8SDmitry Safonov 3000492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 3001492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 3002b8f3ab42SDavid S. Miller (nlh->nlmsg_flags & NLM_F_DUMP)) { 300380d326faSPablo Neira Ayuso struct netlink_dump_control c = { 30041137b5e2SHerbert Xu .start = link->start, 300580d326faSPablo Neira Ayuso .dump = link->dump, 300680d326faSPablo Neira Ayuso .done = link->done, 300780d326faSPablo Neira Ayuso }; 30085106f4a8SDmitry Safonov 30095106f4a8SDmitry Safonov if (link->dump == NULL) { 30105106f4a8SDmitry Safonov err = -EINVAL; 30115106f4a8SDmitry Safonov goto err; 301280d326faSPablo Neira Ayuso } 30135106f4a8SDmitry Safonov 30145106f4a8SDmitry Safonov err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); 30155106f4a8SDmitry Safonov goto err; 30161da177e4SLinus Torvalds } 30171da177e4SLinus Torvalds 30188cb08174SJohannes Berg err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs, 3019880a6fabSChristophe Gouault link->nla_max ? : XFRMA_MAX, 3020fe52145fSJohannes Berg link->nla_pol ? : xfrma_policy, extack); 3021a7bd9a45SThomas Graf if (err < 0) 30225106f4a8SDmitry Safonov goto err; 30235106f4a8SDmitry Safonov 30245106f4a8SDmitry Safonov if (link->doit == NULL) { 30255106f4a8SDmitry Safonov err = -EINVAL; 30265106f4a8SDmitry Safonov goto err; 30275106f4a8SDmitry Safonov } 30285106f4a8SDmitry Safonov 30293bec6c3eSSabrina Dubroca err = link->doit(skb, nlh, attrs, extack); 30305106f4a8SDmitry Safonov 30317c1a80e8SPavel Skripkin /* We need to free skb allocated in xfrm_alloc_compat() before 30327c1a80e8SPavel Skripkin * returning from this function, because consume_skb() won't take 30337c1a80e8SPavel Skripkin * care of frag_list since netlink destructor sets 30347c1a80e8SPavel Skripkin * sbk->head to NULL. (see netlink_skb_destructor()) 30357c1a80e8SPavel Skripkin */ 30367c1a80e8SPavel Skripkin if (skb_has_frag_list(skb)) { 30377c1a80e8SPavel Skripkin kfree_skb(skb_shinfo(skb)->frag_list); 30387c1a80e8SPavel Skripkin skb_shinfo(skb)->frag_list = NULL; 30397c1a80e8SPavel Skripkin } 30407c1a80e8SPavel Skripkin 30415106f4a8SDmitry Safonov err: 30425106f4a8SDmitry Safonov kvfree(nlh64); 3043a7bd9a45SThomas Graf return err; 30441da177e4SLinus Torvalds } 30451da177e4SLinus Torvalds 3046cd40b7d3SDenis V. Lunev static void xfrm_netlink_rcv(struct sk_buff *skb) 30471da177e4SLinus Torvalds { 3048283bc9f3SFan Du struct net *net = sock_net(skb->sk); 3049283bc9f3SFan Du 3050283bc9f3SFan Du mutex_lock(&net->xfrm.xfrm_cfg_mutex); 3051cd40b7d3SDenis V. Lunev netlink_rcv_skb(skb, &xfrm_user_rcv_msg); 3052283bc9f3SFan Du mutex_unlock(&net->xfrm.xfrm_cfg_mutex); 30531da177e4SLinus Torvalds } 30541da177e4SLinus Torvalds 3055a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_expire_msgsize(void) 30567deb2264SThomas Graf { 30576f26b61eSJamal Hadi Salim return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) 30586f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)); 30597deb2264SThomas Graf } 30607deb2264SThomas Graf 3061214e005bSDavid S. Miller static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 30621da177e4SLinus Torvalds { 30631da177e4SLinus Torvalds struct xfrm_user_expire *ue; 30641da177e4SLinus Torvalds struct nlmsghdr *nlh; 30651d1e34ddSDavid S. Miller int err; 30661da177e4SLinus Torvalds 306715e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); 306879b8b7f4SThomas Graf if (nlh == NULL) 306979b8b7f4SThomas Graf return -EMSGSIZE; 30701da177e4SLinus Torvalds 30717b67c857SThomas Graf ue = nlmsg_data(nlh); 30721da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 3073d51d081dSJamal Hadi Salim ue->hard = (c->data.hard != 0) ? 1 : 0; 3074e3e5fc16SMathias Krause /* clear the padding bytes */ 3075caf283d0SKees Cook memset_after(ue, 0, hard); 30761da177e4SLinus Torvalds 30771d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 30781d1e34ddSDavid S. Miller if (err) 30791d1e34ddSDavid S. Miller return err; 30806f26b61eSJamal Hadi Salim 30817e652640SSteffen Klassert err = xfrm_if_id_put(skb, x->if_id); 30827e652640SSteffen Klassert if (err) 30837e652640SSteffen Klassert return err; 30847e652640SSteffen Klassert 3085053c095aSJohannes Berg nlmsg_end(skb, nlh); 3086053c095aSJohannes Berg return 0; 30871da177e4SLinus Torvalds } 30881da177e4SLinus Torvalds 3089214e005bSDavid S. Miller static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) 30901da177e4SLinus Torvalds { 3091fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 30921da177e4SLinus Torvalds struct sk_buff *skb; 30931da177e4SLinus Torvalds 30947deb2264SThomas Graf skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); 30951da177e4SLinus Torvalds if (skb == NULL) 30961da177e4SLinus Torvalds return -ENOMEM; 30971da177e4SLinus Torvalds 30986f26b61eSJamal Hadi Salim if (build_expire(skb, x, c) < 0) { 30996f26b61eSJamal Hadi Salim kfree_skb(skb); 31006f26b61eSJamal Hadi Salim return -EMSGSIZE; 31016f26b61eSJamal Hadi Salim } 31021da177e4SLinus Torvalds 310321ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 31041da177e4SLinus Torvalds } 31051da177e4SLinus Torvalds 3106214e005bSDavid S. Miller static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) 3107d51d081dSJamal Hadi Salim { 3108fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 3109d51d081dSJamal Hadi Salim struct sk_buff *skb; 31102fc5f83bSGustavo A. R. Silva int err; 3111d51d081dSJamal Hadi Salim 3112d8647b79SSteffen Klassert skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 3113d51d081dSJamal Hadi Salim if (skb == NULL) 3114d51d081dSJamal Hadi Salim return -ENOMEM; 3115d51d081dSJamal Hadi Salim 31162fc5f83bSGustavo A. R. Silva err = build_aevent(skb, x, c); 31172fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 3118d51d081dSJamal Hadi Salim 311921ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); 3120d51d081dSJamal Hadi Salim } 3121d51d081dSJamal Hadi Salim 3122214e005bSDavid S. Miller static int xfrm_notify_sa_flush(const struct km_event *c) 312326b15dadSJamal Hadi Salim { 31247067802eSAlexey Dobriyan struct net *net = c->net; 312526b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 312626b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 312726b15dadSJamal Hadi Salim struct sk_buff *skb; 31287deb2264SThomas Graf int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); 312926b15dadSJamal Hadi Salim 31307deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 313126b15dadSJamal Hadi Salim if (skb == NULL) 313226b15dadSJamal Hadi Salim return -ENOMEM; 313326b15dadSJamal Hadi Salim 313415e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); 313579b8b7f4SThomas Graf if (nlh == NULL) { 313679b8b7f4SThomas Graf kfree_skb(skb); 313779b8b7f4SThomas Graf return -EMSGSIZE; 313879b8b7f4SThomas Graf } 313926b15dadSJamal Hadi Salim 31407b67c857SThomas Graf p = nlmsg_data(nlh); 3141bf08867fSHerbert Xu p->proto = c->data.proto; 314226b15dadSJamal Hadi Salim 31439825069dSThomas Graf nlmsg_end(skb, nlh); 314426b15dadSJamal Hadi Salim 314521ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 314626b15dadSJamal Hadi Salim } 314726b15dadSJamal Hadi Salim 3148a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sa_len(struct xfrm_state *x) 314926b15dadSJamal Hadi Salim { 3150a1b831f2SAlexey Dobriyan unsigned int l = 0; 31511a6509d9SHerbert Xu if (x->aead) 31521a6509d9SHerbert Xu l += nla_total_size(aead_len(x->aead)); 31534447bb33SMartin Willi if (x->aalg) { 31544447bb33SMartin Willi l += nla_total_size(sizeof(struct xfrm_algo) + 31554447bb33SMartin Willi (x->aalg->alg_key_len + 7) / 8); 31564447bb33SMartin Willi l += nla_total_size(xfrm_alg_auth_len(x->aalg)); 31574447bb33SMartin Willi } 315826b15dadSJamal Hadi Salim if (x->ealg) 31590f99be0dSEric Dumazet l += nla_total_size(xfrm_alg_len(x->ealg)); 316026b15dadSJamal Hadi Salim if (x->calg) 31617deb2264SThomas Graf l += nla_total_size(sizeof(*x->calg)); 316226b15dadSJamal Hadi Salim if (x->encap) 31637deb2264SThomas Graf l += nla_total_size(sizeof(*x->encap)); 316435d2856bSMartin Willi if (x->tfcpad) 316535d2856bSMartin Willi l += nla_total_size(sizeof(x->tfcpad)); 3166d8647b79SSteffen Klassert if (x->replay_esn) 3167d8647b79SSteffen Klassert l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); 3168f293a5e3Sdingzhi else 3169f293a5e3Sdingzhi l += nla_total_size(sizeof(struct xfrm_replay_state)); 317068325d3bSHerbert Xu if (x->security) 317168325d3bSHerbert Xu l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + 317268325d3bSHerbert Xu x->security->ctx_len); 317368325d3bSHerbert Xu if (x->coaddr) 317468325d3bSHerbert Xu l += nla_total_size(sizeof(*x->coaddr)); 3175a947b0a9SNicolas Dichtel if (x->props.extra_flags) 3176a947b0a9SNicolas Dichtel l += nla_total_size(sizeof(x->props.extra_flags)); 3177d77e38e6SSteffen Klassert if (x->xso.dev) 31787770a39dSEric Dumazet l += nla_total_size(sizeof(struct xfrm_user_offload)); 31799b42c1f1SSteffen Klassert if (x->props.smark.v | x->props.smark.m) { 31809b42c1f1SSteffen Klassert l += nla_total_size(sizeof(x->props.smark.v)); 31819b42c1f1SSteffen Klassert l += nla_total_size(sizeof(x->props.smark.m)); 31829b42c1f1SSteffen Klassert } 31837e652640SSteffen Klassert if (x->if_id) 31847e652640SSteffen Klassert l += nla_total_size(sizeof(x->if_id)); 318568325d3bSHerbert Xu 3186d26f3984SHerbert Xu /* Must count x->lastused as it may become non-zero behind our back. */ 3187de95c4a4SNicolas Dichtel l += nla_total_size_64bit(sizeof(u64)); 318826b15dadSJamal Hadi Salim 31894e484b3eSAntony Antony if (x->mapping_maxage) 31904e484b3eSAntony Antony l += nla_total_size(sizeof(x->mapping_maxage)); 31914e484b3eSAntony Antony 319226b15dadSJamal Hadi Salim return l; 319326b15dadSJamal Hadi Salim } 319426b15dadSJamal Hadi Salim 3195214e005bSDavid S. Miller static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) 319626b15dadSJamal Hadi Salim { 3197fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 319826b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 31990603eac0SHerbert Xu struct xfrm_usersa_id *id; 320026b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 320126b15dadSJamal Hadi Salim struct sk_buff *skb; 3202a1b831f2SAlexey Dobriyan unsigned int len = xfrm_sa_len(x); 3203a1b831f2SAlexey Dobriyan unsigned int headlen; 3204a1b831f2SAlexey Dobriyan int err; 32050603eac0SHerbert Xu 32060603eac0SHerbert Xu headlen = sizeof(*p); 32070603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 32087deb2264SThomas Graf len += nla_total_size(headlen); 32090603eac0SHerbert Xu headlen = sizeof(*id); 32106f26b61eSJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 32110603eac0SHerbert Xu } 32127deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 321326b15dadSJamal Hadi Salim 32147deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 321526b15dadSJamal Hadi Salim if (skb == NULL) 321626b15dadSJamal Hadi Salim return -ENOMEM; 321726b15dadSJamal Hadi Salim 321815e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 32191d1e34ddSDavid S. Miller err = -EMSGSIZE; 322079b8b7f4SThomas Graf if (nlh == NULL) 32211d1e34ddSDavid S. Miller goto out_free_skb; 322226b15dadSJamal Hadi Salim 32237b67c857SThomas Graf p = nlmsg_data(nlh); 32240603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 3225c0144beaSThomas Graf struct nlattr *attr; 3226c0144beaSThomas Graf 32277b67c857SThomas Graf id = nlmsg_data(nlh); 322850329c8aSMathias Krause memset(id, 0, sizeof(*id)); 32290603eac0SHerbert Xu memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); 32300603eac0SHerbert Xu id->spi = x->id.spi; 32310603eac0SHerbert Xu id->family = x->props.family; 32320603eac0SHerbert Xu id->proto = x->id.proto; 32330603eac0SHerbert Xu 3234c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); 32351d1e34ddSDavid S. Miller err = -EMSGSIZE; 3236c0144beaSThomas Graf if (attr == NULL) 32371d1e34ddSDavid S. Miller goto out_free_skb; 3238c0144beaSThomas Graf 3239c0144beaSThomas Graf p = nla_data(attr); 32400603eac0SHerbert Xu } 32411d1e34ddSDavid S. Miller err = copy_to_user_state_extra(x, p, skb); 32421d1e34ddSDavid S. Miller if (err) 32431d1e34ddSDavid S. Miller goto out_free_skb; 324426b15dadSJamal Hadi Salim 32459825069dSThomas Graf nlmsg_end(skb, nlh); 324626b15dadSJamal Hadi Salim 324721ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 324826b15dadSJamal Hadi Salim 32491d1e34ddSDavid S. Miller out_free_skb: 325026b15dadSJamal Hadi Salim kfree_skb(skb); 32511d1e34ddSDavid S. Miller return err; 325226b15dadSJamal Hadi Salim } 325326b15dadSJamal Hadi Salim 3254214e005bSDavid S. Miller static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) 325526b15dadSJamal Hadi Salim { 325626b15dadSJamal Hadi Salim 325726b15dadSJamal Hadi Salim switch (c->event) { 3258f60f6b8fSHerbert Xu case XFRM_MSG_EXPIRE: 325926b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 3260d51d081dSJamal Hadi Salim case XFRM_MSG_NEWAE: 3261d51d081dSJamal Hadi Salim return xfrm_aevent_state_notify(x, c); 3262f60f6b8fSHerbert Xu case XFRM_MSG_DELSA: 3263f60f6b8fSHerbert Xu case XFRM_MSG_UPDSA: 3264f60f6b8fSHerbert Xu case XFRM_MSG_NEWSA: 326526b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 3266f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHSA: 326726b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 326826b15dadSJamal Hadi Salim default: 326962db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", 327062db5cfdSstephen hemminger c->event); 327126b15dadSJamal Hadi Salim break; 327226b15dadSJamal Hadi Salim } 327326b15dadSJamal Hadi Salim 327426b15dadSJamal Hadi Salim return 0; 327526b15dadSJamal Hadi Salim 327626b15dadSJamal Hadi Salim } 327726b15dadSJamal Hadi Salim 3278a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x, 32797deb2264SThomas Graf struct xfrm_policy *xp) 32807deb2264SThomas Graf { 32817deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) 32827deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 32836f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 32847deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(x->security)) 32857deb2264SThomas Graf + userpolicy_type_attrsize(); 32867deb2264SThomas Graf } 32877deb2264SThomas Graf 32881da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 328965e0736bSFan Du struct xfrm_tmpl *xt, struct xfrm_policy *xp) 32901da177e4SLinus Torvalds { 32911d1e34ddSDavid S. Miller __u32 seq = xfrm_get_acqseq(); 32921da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 32931da177e4SLinus Torvalds struct nlmsghdr *nlh; 32941d1e34ddSDavid S. Miller int err; 32951da177e4SLinus Torvalds 329679b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); 329779b8b7f4SThomas Graf if (nlh == NULL) 329879b8b7f4SThomas Graf return -EMSGSIZE; 32991da177e4SLinus Torvalds 33007b67c857SThomas Graf ua = nlmsg_data(nlh); 33011da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 33021da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 33031da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 330465e0736bSFan Du copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); 33051da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 33061da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 33071da177e4SLinus Torvalds ua->calgos = xt->calgos; 33081da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 33091da177e4SLinus Torvalds 33101d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 33111d1e34ddSDavid S. Miller if (!err) 33121d1e34ddSDavid S. Miller err = copy_to_user_state_sec_ctx(x, skb); 33131d1e34ddSDavid S. Miller if (!err) 33141d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 33151d1e34ddSDavid S. Miller if (!err) 33161d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 33177e652640SSteffen Klassert if (!err) 33187e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 33191d1e34ddSDavid S. Miller if (err) { 33201d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 33211d1e34ddSDavid S. Miller return err; 33221d1e34ddSDavid S. Miller } 33231da177e4SLinus Torvalds 3324053c095aSJohannes Berg nlmsg_end(skb, nlh); 3325053c095aSJohannes Berg return 0; 33261da177e4SLinus Torvalds } 33271da177e4SLinus Torvalds 33281da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 332965e0736bSFan Du struct xfrm_policy *xp) 33301da177e4SLinus Torvalds { 3331a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 33321da177e4SLinus Torvalds struct sk_buff *skb; 33332fc5f83bSGustavo A. R. Silva int err; 33341da177e4SLinus Torvalds 33357deb2264SThomas Graf skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); 33361da177e4SLinus Torvalds if (skb == NULL) 33371da177e4SLinus Torvalds return -ENOMEM; 33381da177e4SLinus Torvalds 33392fc5f83bSGustavo A. R. Silva err = build_acquire(skb, x, xt, xp); 33402fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 33411da177e4SLinus Torvalds 334221ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); 33431da177e4SLinus Torvalds } 33441da177e4SLinus Torvalds 33451da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 33461da177e4SLinus Torvalds * or more templates. 33471da177e4SLinus Torvalds */ 3348cb969f07SVenkat Yekkirala static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, 33491da177e4SLinus Torvalds u8 *data, int len, int *dir) 33501da177e4SLinus Torvalds { 3351fc34acd3SAlexey Dobriyan struct net *net = sock_net(sk); 33521da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 33531da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 33541da177e4SLinus Torvalds struct xfrm_policy *xp; 33551da177e4SLinus Torvalds int nr; 33561da177e4SLinus Torvalds 3357cb969f07SVenkat Yekkirala switch (sk->sk_family) { 33581da177e4SLinus Torvalds case AF_INET: 33591da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 33601da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 33611da177e4SLinus Torvalds return NULL; 33621da177e4SLinus Torvalds } 33631da177e4SLinus Torvalds break; 3364dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 33651da177e4SLinus Torvalds case AF_INET6: 33661da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 33671da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 33681da177e4SLinus Torvalds return NULL; 33691da177e4SLinus Torvalds } 33701da177e4SLinus Torvalds break; 33711da177e4SLinus Torvalds #endif 33721da177e4SLinus Torvalds default: 33731da177e4SLinus Torvalds *dir = -EINVAL; 33741da177e4SLinus Torvalds return NULL; 33751da177e4SLinus Torvalds } 33761da177e4SLinus Torvalds 33771da177e4SLinus Torvalds *dir = -EINVAL; 33781da177e4SLinus Torvalds 33791da177e4SLinus Torvalds if (len < sizeof(*p) || 3380ec2b4f01SSabrina Dubroca verify_newpolicy_info(p, NULL)) 33811da177e4SLinus Torvalds return NULL; 33821da177e4SLinus Torvalds 33831da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 3384d37bed89SSabrina Dubroca if (validate_tmpl(nr, ut, p->sel.family, NULL)) 33851da177e4SLinus Torvalds return NULL; 33861da177e4SLinus Torvalds 3387a4f1bac6SHerbert Xu if (p->dir > XFRM_POLICY_OUT) 3388a4f1bac6SHerbert Xu return NULL; 3389a4f1bac6SHerbert Xu 33902f09a4d5SHerbert Xu xp = xfrm_policy_alloc(net, GFP_ATOMIC); 33911da177e4SLinus Torvalds if (xp == NULL) { 33921da177e4SLinus Torvalds *dir = -ENOBUFS; 33931da177e4SLinus Torvalds return NULL; 33941da177e4SLinus Torvalds } 33951da177e4SLinus Torvalds 33961da177e4SLinus Torvalds copy_from_user_policy(xp, p); 3397f7b6983fSMasahide NAKAMURA xp->type = XFRM_POLICY_TYPE_MAIN; 33981da177e4SLinus Torvalds copy_templates(xp, ut, nr); 33991da177e4SLinus Torvalds 34001da177e4SLinus Torvalds *dir = p->dir; 34011da177e4SLinus Torvalds 34021da177e4SLinus Torvalds return xp; 34031da177e4SLinus Torvalds } 34041da177e4SLinus Torvalds 3405a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp) 34067deb2264SThomas Graf { 34077deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) 34087deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 34097deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) 3410295fae56SJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 34117deb2264SThomas Graf + userpolicy_type_attrsize(); 34127deb2264SThomas Graf } 34137deb2264SThomas Graf 34141da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 3415214e005bSDavid S. Miller int dir, const struct km_event *c) 34161da177e4SLinus Torvalds { 34171da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 3418d51d081dSJamal Hadi Salim int hard = c->data.hard; 34191d1e34ddSDavid S. Miller struct nlmsghdr *nlh; 34201d1e34ddSDavid S. Miller int err; 34211da177e4SLinus Torvalds 342215e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); 342379b8b7f4SThomas Graf if (nlh == NULL) 342479b8b7f4SThomas Graf return -EMSGSIZE; 34251da177e4SLinus Torvalds 34267b67c857SThomas Graf upe = nlmsg_data(nlh); 34271da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 34281d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 34291d1e34ddSDavid S. Miller if (!err) 34301d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 34311d1e34ddSDavid S. Miller if (!err) 34321d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 34331d1e34ddSDavid S. Miller if (!err) 34341d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 34357e652640SSteffen Klassert if (!err) 34367e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 34371d1e34ddSDavid S. Miller if (err) { 34381d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 34391d1e34ddSDavid S. Miller return err; 34401d1e34ddSDavid S. Miller } 34411da177e4SLinus Torvalds upe->hard = !!hard; 34421da177e4SLinus Torvalds 3443053c095aSJohannes Berg nlmsg_end(skb, nlh); 3444053c095aSJohannes Berg return 0; 34451da177e4SLinus Torvalds } 34461da177e4SLinus Torvalds 3447214e005bSDavid S. Miller static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 34481da177e4SLinus Torvalds { 3449fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 34501da177e4SLinus Torvalds struct sk_buff *skb; 34512fc5f83bSGustavo A. R. Silva int err; 34521da177e4SLinus Torvalds 34537deb2264SThomas Graf skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); 34541da177e4SLinus Torvalds if (skb == NULL) 34551da177e4SLinus Torvalds return -ENOMEM; 34561da177e4SLinus Torvalds 34572fc5f83bSGustavo A. R. Silva err = build_polexpire(skb, xp, dir, c); 34582fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 34591da177e4SLinus Torvalds 346021ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 34611da177e4SLinus Torvalds } 34621da177e4SLinus Torvalds 3463214e005bSDavid S. Miller static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) 346426b15dadSJamal Hadi Salim { 3465a1b831f2SAlexey Dobriyan unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 3466fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 346726b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 34680603eac0SHerbert Xu struct xfrm_userpolicy_id *id; 346926b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 347026b15dadSJamal Hadi Salim struct sk_buff *skb; 3471a1b831f2SAlexey Dobriyan unsigned int headlen; 3472a1b831f2SAlexey Dobriyan int err; 34730603eac0SHerbert Xu 34740603eac0SHerbert Xu headlen = sizeof(*p); 34750603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 34767deb2264SThomas Graf len += nla_total_size(headlen); 34770603eac0SHerbert Xu headlen = sizeof(*id); 34780603eac0SHerbert Xu } 3479cfbfd45aSThomas Graf len += userpolicy_type_attrsize(); 3480295fae56SJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 34817deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 348226b15dadSJamal Hadi Salim 34837deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 348426b15dadSJamal Hadi Salim if (skb == NULL) 348526b15dadSJamal Hadi Salim return -ENOMEM; 348626b15dadSJamal Hadi Salim 348715e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 34881d1e34ddSDavid S. Miller err = -EMSGSIZE; 348979b8b7f4SThomas Graf if (nlh == NULL) 34901d1e34ddSDavid S. Miller goto out_free_skb; 349126b15dadSJamal Hadi Salim 34927b67c857SThomas Graf p = nlmsg_data(nlh); 34930603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 3494c0144beaSThomas Graf struct nlattr *attr; 3495c0144beaSThomas Graf 34967b67c857SThomas Graf id = nlmsg_data(nlh); 34970603eac0SHerbert Xu memset(id, 0, sizeof(*id)); 34980603eac0SHerbert Xu id->dir = dir; 34990603eac0SHerbert Xu if (c->data.byid) 35000603eac0SHerbert Xu id->index = xp->index; 35010603eac0SHerbert Xu else 35020603eac0SHerbert Xu memcpy(&id->sel, &xp->selector, sizeof(id->sel)); 35030603eac0SHerbert Xu 3504c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); 35051d1e34ddSDavid S. Miller err = -EMSGSIZE; 3506c0144beaSThomas Graf if (attr == NULL) 35071d1e34ddSDavid S. Miller goto out_free_skb; 3508c0144beaSThomas Graf 3509c0144beaSThomas Graf p = nla_data(attr); 35100603eac0SHerbert Xu } 351126b15dadSJamal Hadi Salim 351226b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 35131d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 35141d1e34ddSDavid S. Miller if (!err) 35151d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 35161d1e34ddSDavid S. Miller if (!err) 35171d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 35187e652640SSteffen Klassert if (!err) 35197e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 35201d1e34ddSDavid S. Miller if (err) 35211d1e34ddSDavid S. Miller goto out_free_skb; 3522295fae56SJamal Hadi Salim 35239825069dSThomas Graf nlmsg_end(skb, nlh); 352426b15dadSJamal Hadi Salim 352521ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 352626b15dadSJamal Hadi Salim 35271d1e34ddSDavid S. Miller out_free_skb: 352826b15dadSJamal Hadi Salim kfree_skb(skb); 35291d1e34ddSDavid S. Miller return err; 353026b15dadSJamal Hadi Salim } 353126b15dadSJamal Hadi Salim 3532214e005bSDavid S. Miller static int xfrm_notify_policy_flush(const struct km_event *c) 353326b15dadSJamal Hadi Salim { 35347067802eSAlexey Dobriyan struct net *net = c->net; 353526b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 353626b15dadSJamal Hadi Salim struct sk_buff *skb; 35371d1e34ddSDavid S. Miller int err; 353826b15dadSJamal Hadi Salim 35397deb2264SThomas Graf skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); 354026b15dadSJamal Hadi Salim if (skb == NULL) 354126b15dadSJamal Hadi Salim return -ENOMEM; 354226b15dadSJamal Hadi Salim 354315e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); 35441d1e34ddSDavid S. Miller err = -EMSGSIZE; 354579b8b7f4SThomas Graf if (nlh == NULL) 35461d1e34ddSDavid S. Miller goto out_free_skb; 35471d1e34ddSDavid S. Miller err = copy_to_user_policy_type(c->data.type, skb); 35481d1e34ddSDavid S. Miller if (err) 35491d1e34ddSDavid S. Miller goto out_free_skb; 355026b15dadSJamal Hadi Salim 35519825069dSThomas Graf nlmsg_end(skb, nlh); 355226b15dadSJamal Hadi Salim 355321ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 355426b15dadSJamal Hadi Salim 35551d1e34ddSDavid S. Miller out_free_skb: 355626b15dadSJamal Hadi Salim kfree_skb(skb); 35571d1e34ddSDavid S. Miller return err; 355826b15dadSJamal Hadi Salim } 355926b15dadSJamal Hadi Salim 3560214e005bSDavid S. Miller static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 356126b15dadSJamal Hadi Salim { 356226b15dadSJamal Hadi Salim 356326b15dadSJamal Hadi Salim switch (c->event) { 3564f60f6b8fSHerbert Xu case XFRM_MSG_NEWPOLICY: 3565f60f6b8fSHerbert Xu case XFRM_MSG_UPDPOLICY: 3566f60f6b8fSHerbert Xu case XFRM_MSG_DELPOLICY: 356726b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 3568f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHPOLICY: 356926b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 3570f60f6b8fSHerbert Xu case XFRM_MSG_POLEXPIRE: 357126b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 357226b15dadSJamal Hadi Salim default: 357362db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", 357462db5cfdSstephen hemminger c->event); 357526b15dadSJamal Hadi Salim } 357626b15dadSJamal Hadi Salim 357726b15dadSJamal Hadi Salim return 0; 357826b15dadSJamal Hadi Salim 357926b15dadSJamal Hadi Salim } 358026b15dadSJamal Hadi Salim 3581a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_report_msgsize(void) 35827deb2264SThomas Graf { 35837deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); 35847deb2264SThomas Graf } 35857deb2264SThomas Graf 358697a64b45SMasahide NAKAMURA static int build_report(struct sk_buff *skb, u8 proto, 358797a64b45SMasahide NAKAMURA struct xfrm_selector *sel, xfrm_address_t *addr) 358897a64b45SMasahide NAKAMURA { 358997a64b45SMasahide NAKAMURA struct xfrm_user_report *ur; 359097a64b45SMasahide NAKAMURA struct nlmsghdr *nlh; 359197a64b45SMasahide NAKAMURA 359279b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); 359379b8b7f4SThomas Graf if (nlh == NULL) 359479b8b7f4SThomas Graf return -EMSGSIZE; 359597a64b45SMasahide NAKAMURA 35967b67c857SThomas Graf ur = nlmsg_data(nlh); 359797a64b45SMasahide NAKAMURA ur->proto = proto; 359897a64b45SMasahide NAKAMURA memcpy(&ur->sel, sel, sizeof(ur->sel)); 359997a64b45SMasahide NAKAMURA 36001d1e34ddSDavid S. Miller if (addr) { 36011d1e34ddSDavid S. Miller int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); 36021d1e34ddSDavid S. Miller if (err) { 36039825069dSThomas Graf nlmsg_cancel(skb, nlh); 36041d1e34ddSDavid S. Miller return err; 36051d1e34ddSDavid S. Miller } 36061d1e34ddSDavid S. Miller } 3607053c095aSJohannes Berg nlmsg_end(skb, nlh); 3608053c095aSJohannes Berg return 0; 360997a64b45SMasahide NAKAMURA } 361097a64b45SMasahide NAKAMURA 3611db983c11SAlexey Dobriyan static int xfrm_send_report(struct net *net, u8 proto, 3612db983c11SAlexey Dobriyan struct xfrm_selector *sel, xfrm_address_t *addr) 361397a64b45SMasahide NAKAMURA { 361497a64b45SMasahide NAKAMURA struct sk_buff *skb; 36152fc5f83bSGustavo A. R. Silva int err; 361697a64b45SMasahide NAKAMURA 36177deb2264SThomas Graf skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); 361897a64b45SMasahide NAKAMURA if (skb == NULL) 361997a64b45SMasahide NAKAMURA return -ENOMEM; 362097a64b45SMasahide NAKAMURA 36212fc5f83bSGustavo A. R. Silva err = build_report(skb, proto, sel, addr); 36222fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 362397a64b45SMasahide NAKAMURA 362421ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); 362597a64b45SMasahide NAKAMURA } 362697a64b45SMasahide NAKAMURA 3627a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_mapping_msgsize(void) 36283a2dfbe8SMartin Willi { 36293a2dfbe8SMartin Willi return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); 36303a2dfbe8SMartin Willi } 36313a2dfbe8SMartin Willi 36323a2dfbe8SMartin Willi static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, 36333a2dfbe8SMartin Willi xfrm_address_t *new_saddr, __be16 new_sport) 36343a2dfbe8SMartin Willi { 36353a2dfbe8SMartin Willi struct xfrm_user_mapping *um; 36363a2dfbe8SMartin Willi struct nlmsghdr *nlh; 36373a2dfbe8SMartin Willi 36383a2dfbe8SMartin Willi nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); 36393a2dfbe8SMartin Willi if (nlh == NULL) 36403a2dfbe8SMartin Willi return -EMSGSIZE; 36413a2dfbe8SMartin Willi 36423a2dfbe8SMartin Willi um = nlmsg_data(nlh); 36433a2dfbe8SMartin Willi 36443a2dfbe8SMartin Willi memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); 36453a2dfbe8SMartin Willi um->id.spi = x->id.spi; 36463a2dfbe8SMartin Willi um->id.family = x->props.family; 36473a2dfbe8SMartin Willi um->id.proto = x->id.proto; 36483a2dfbe8SMartin Willi memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); 36493a2dfbe8SMartin Willi memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); 36503a2dfbe8SMartin Willi um->new_sport = new_sport; 36513a2dfbe8SMartin Willi um->old_sport = x->encap->encap_sport; 36523a2dfbe8SMartin Willi um->reqid = x->props.reqid; 36533a2dfbe8SMartin Willi 3654053c095aSJohannes Berg nlmsg_end(skb, nlh); 3655053c095aSJohannes Berg return 0; 36563a2dfbe8SMartin Willi } 36573a2dfbe8SMartin Willi 36583a2dfbe8SMartin Willi static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, 36593a2dfbe8SMartin Willi __be16 sport) 36603a2dfbe8SMartin Willi { 3661a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 36623a2dfbe8SMartin Willi struct sk_buff *skb; 36632fc5f83bSGustavo A. R. Silva int err; 36643a2dfbe8SMartin Willi 36653a2dfbe8SMartin Willi if (x->id.proto != IPPROTO_ESP) 36663a2dfbe8SMartin Willi return -EINVAL; 36673a2dfbe8SMartin Willi 36683a2dfbe8SMartin Willi if (!x->encap) 36693a2dfbe8SMartin Willi return -EINVAL; 36703a2dfbe8SMartin Willi 36713a2dfbe8SMartin Willi skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); 36723a2dfbe8SMartin Willi if (skb == NULL) 36733a2dfbe8SMartin Willi return -ENOMEM; 36743a2dfbe8SMartin Willi 36752fc5f83bSGustavo A. R. Silva err = build_mapping(skb, x, ipaddr, sport); 36762fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 36773a2dfbe8SMartin Willi 367821ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); 36793a2dfbe8SMartin Willi } 36803a2dfbe8SMartin Willi 36810f24558eSHoria Geanta static bool xfrm_is_alive(const struct km_event *c) 36820f24558eSHoria Geanta { 36830f24558eSHoria Geanta return (bool)xfrm_acquire_is_on(c->net); 36840f24558eSHoria Geanta } 36850f24558eSHoria Geanta 36861da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 36871da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 36881da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 36891da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 36901da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 369197a64b45SMasahide NAKAMURA .report = xfrm_send_report, 36925c79de6eSShinta Sugimoto .migrate = xfrm_send_migrate, 36933a2dfbe8SMartin Willi .new_mapping = xfrm_send_mapping, 36940f24558eSHoria Geanta .is_alive = xfrm_is_alive, 36951da177e4SLinus Torvalds }; 36961da177e4SLinus Torvalds 3697a6483b79SAlexey Dobriyan static int __net_init xfrm_user_net_init(struct net *net) 36981da177e4SLinus Torvalds { 3699be33690dSPatrick McHardy struct sock *nlsk; 3700a31f2d17SPablo Neira Ayuso struct netlink_kernel_cfg cfg = { 3701a31f2d17SPablo Neira Ayuso .groups = XFRMNLGRP_MAX, 3702a31f2d17SPablo Neira Ayuso .input = xfrm_netlink_rcv, 3703a31f2d17SPablo Neira Ayuso }; 3704be33690dSPatrick McHardy 37059f00d977SPablo Neira Ayuso nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); 3706be33690dSPatrick McHardy if (nlsk == NULL) 37071da177e4SLinus Torvalds return -ENOMEM; 3708d79d792eSEric W. Biederman net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ 3709cf778b00SEric Dumazet rcu_assign_pointer(net->xfrm.nlsk, nlsk); 37101da177e4SLinus Torvalds return 0; 37111da177e4SLinus Torvalds } 37121da177e4SLinus Torvalds 37136218fe18SFlorian Westphal static void __net_exit xfrm_user_net_pre_exit(struct net *net) 37146218fe18SFlorian Westphal { 37156218fe18SFlorian Westphal RCU_INIT_POINTER(net->xfrm.nlsk, NULL); 37166218fe18SFlorian Westphal } 37176218fe18SFlorian Westphal 3718d79d792eSEric W. Biederman static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) 3719a6483b79SAlexey Dobriyan { 3720d79d792eSEric W. Biederman struct net *net; 37216218fe18SFlorian Westphal 3722d79d792eSEric W. Biederman list_for_each_entry(net, net_exit_list, exit_list) 3723d79d792eSEric W. Biederman netlink_kernel_release(net->xfrm.nlsk_stash); 3724a6483b79SAlexey Dobriyan } 3725a6483b79SAlexey Dobriyan 3726a6483b79SAlexey Dobriyan static struct pernet_operations xfrm_user_net_ops = { 3727a6483b79SAlexey Dobriyan .init = xfrm_user_net_init, 37286218fe18SFlorian Westphal .pre_exit = xfrm_user_net_pre_exit, 3729d79d792eSEric W. Biederman .exit_batch = xfrm_user_net_exit, 3730a6483b79SAlexey Dobriyan }; 3731a6483b79SAlexey Dobriyan 3732a6483b79SAlexey Dobriyan static int __init xfrm_user_init(void) 3733a6483b79SAlexey Dobriyan { 3734a6483b79SAlexey Dobriyan int rv; 3735a6483b79SAlexey Dobriyan 3736a6483b79SAlexey Dobriyan printk(KERN_INFO "Initializing XFRM netlink socket\n"); 3737a6483b79SAlexey Dobriyan 3738a6483b79SAlexey Dobriyan rv = register_pernet_subsys(&xfrm_user_net_ops); 3739a6483b79SAlexey Dobriyan if (rv < 0) 3740a6483b79SAlexey Dobriyan return rv; 3741f41b284aSZhengchao Shao xfrm_register_km(&netlink_mgr); 3742f41b284aSZhengchao Shao return 0; 3743a6483b79SAlexey Dobriyan } 3744a6483b79SAlexey Dobriyan 37451da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 37461da177e4SLinus Torvalds { 37471da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 3748a6483b79SAlexey Dobriyan unregister_pernet_subsys(&xfrm_user_net_ops); 37491da177e4SLinus Torvalds } 37501da177e4SLinus Torvalds 37511da177e4SLinus Torvalds module_init(xfrm_user_init); 37521da177e4SLinus Torvalds module_exit(xfrm_user_exit); 37531da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 37544fdb3bb7SHarald Welte MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); 3755