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 381fc8fde5SSabrina Dubroca static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type, 391fc8fde5SSabrina Dubroca struct netlink_ext_ack *extack) 401da177e4SLinus Torvalds { 415424f32eSThomas Graf struct nlattr *rt = attrs[type]; 421da177e4SLinus Torvalds struct xfrm_algo *algp; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds if (!rt) 451da177e4SLinus Torvalds return 0; 461da177e4SLinus Torvalds 475424f32eSThomas Graf algp = nla_data(rt); 481fc8fde5SSabrina Dubroca if (nla_len(rt) < (int)xfrm_alg_len(algp)) { 491fc8fde5SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid AUTH/CRYPT/COMP attribute length"); 5031c26852SHerbert Xu return -EINVAL; 511fc8fde5SSabrina Dubroca } 5231c26852SHerbert Xu 531da177e4SLinus Torvalds switch (type) { 541da177e4SLinus Torvalds case XFRMA_ALG_AUTH: 551da177e4SLinus Torvalds case XFRMA_ALG_CRYPT: 561da177e4SLinus Torvalds case XFRMA_ALG_COMP: 571da177e4SLinus Torvalds break; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds default: 601fc8fde5SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid algorithm attribute type"); 611da177e4SLinus Torvalds return -EINVAL; 623ff50b79SStephen Hemminger } 631da177e4SLinus Torvalds 64633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 651da177e4SLinus Torvalds return 0; 661da177e4SLinus Torvalds } 671da177e4SLinus Torvalds 681fc8fde5SSabrina Dubroca static int verify_auth_trunc(struct nlattr **attrs, 691fc8fde5SSabrina Dubroca struct netlink_ext_ack *extack) 704447bb33SMartin Willi { 714447bb33SMartin Willi struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; 724447bb33SMartin Willi struct xfrm_algo_auth *algp; 734447bb33SMartin Willi 744447bb33SMartin Willi if (!rt) 754447bb33SMartin Willi return 0; 764447bb33SMartin Willi 774447bb33SMartin Willi algp = nla_data(rt); 781fc8fde5SSabrina Dubroca if (nla_len(rt) < (int)xfrm_alg_auth_len(algp)) { 791fc8fde5SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid AUTH_TRUNC attribute length"); 804447bb33SMartin Willi return -EINVAL; 811fc8fde5SSabrina Dubroca } 824447bb33SMartin Willi 83633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 844447bb33SMartin Willi return 0; 854447bb33SMartin Willi } 864447bb33SMartin Willi 871fc8fde5SSabrina Dubroca static int verify_aead(struct nlattr **attrs, struct netlink_ext_ack *extack) 881a6509d9SHerbert Xu { 891a6509d9SHerbert Xu struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; 901a6509d9SHerbert Xu struct xfrm_algo_aead *algp; 911a6509d9SHerbert Xu 921a6509d9SHerbert Xu if (!rt) 931a6509d9SHerbert Xu return 0; 941a6509d9SHerbert Xu 951a6509d9SHerbert Xu algp = nla_data(rt); 961fc8fde5SSabrina Dubroca if (nla_len(rt) < (int)aead_len(algp)) { 971fc8fde5SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid AEAD attribute length"); 981a6509d9SHerbert Xu return -EINVAL; 991fc8fde5SSabrina Dubroca } 1001a6509d9SHerbert Xu 101633439f5SHerbert Xu algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; 1021a6509d9SHerbert Xu return 0; 1031a6509d9SHerbert Xu } 1041a6509d9SHerbert Xu 1055424f32eSThomas Graf static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, 106eb2971b6SMasahide NAKAMURA xfrm_address_t **addrp) 107eb2971b6SMasahide NAKAMURA { 1085424f32eSThomas Graf struct nlattr *rt = attrs[type]; 109eb2971b6SMasahide NAKAMURA 110cf5cb79fSThomas Graf if (rt && addrp) 1115424f32eSThomas Graf *addrp = nla_data(rt); 112eb2971b6SMasahide NAKAMURA } 113df71837dSTrent Jaeger 11408a717e4SSabrina Dubroca static inline int verify_sec_ctx_len(struct nlattr **attrs, struct netlink_ext_ack *extack) 115df71837dSTrent Jaeger { 1165424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 117df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 118df71837dSTrent Jaeger 119df71837dSTrent Jaeger if (!rt) 120df71837dSTrent Jaeger return 0; 121df71837dSTrent Jaeger 1225424f32eSThomas Graf uctx = nla_data(rt); 123171d449aSXin Long if (uctx->len > nla_len(rt) || 12408a717e4SSabrina Dubroca uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) { 12508a717e4SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid security context length"); 126df71837dSTrent Jaeger return -EINVAL; 12708a717e4SSabrina Dubroca } 128df71837dSTrent Jaeger 129df71837dSTrent Jaeger return 0; 130df71837dSTrent Jaeger } 131df71837dSTrent Jaeger 132d8647b79SSteffen Klassert static inline int verify_replay(struct xfrm_usersa_info *p, 133785b87b2SSabrina Dubroca struct nlattr **attrs, 134785b87b2SSabrina Dubroca struct netlink_ext_ack *extack) 135d8647b79SSteffen Klassert { 136d8647b79SSteffen Klassert struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; 137ecd79187SMathias Krause struct xfrm_replay_state_esn *rs; 138d8647b79SSteffen Klassert 139785b87b2SSabrina Dubroca if (!rt) { 140785b87b2SSabrina Dubroca if (p->flags & XFRM_STATE_ESN) { 141785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for ESN"); 142785b87b2SSabrina Dubroca return -EINVAL; 143785b87b2SSabrina Dubroca } 144785b87b2SSabrina Dubroca return 0; 145785b87b2SSabrina Dubroca } 1467833aa05SSteffen Klassert 147ecd79187SMathias Krause rs = nla_data(rt); 148ecd79187SMathias Krause 149785b87b2SSabrina Dubroca if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) { 150785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN bitmap length must be <= 128"); 151ecd79187SMathias Krause return -EINVAL; 152785b87b2SSabrina Dubroca } 153ecd79187SMathias Krause 1545e708e47SAlexey Dobriyan if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) && 155785b87b2SSabrina Dubroca nla_len(rt) != sizeof(*rs)) { 156785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN attribute is too short to fit the full bitmap length"); 157ecd79187SMathias Krause return -EINVAL; 158785b87b2SSabrina Dubroca } 159d8647b79SSteffen Klassert 16001714109SFan Du /* As only ESP and AH support ESN feature. */ 161785b87b2SSabrina Dubroca if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) { 162785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN only supported for ESP and AH"); 16302aadf72SSteffen Klassert return -EINVAL; 164785b87b2SSabrina Dubroca } 16502aadf72SSteffen Klassert 166785b87b2SSabrina Dubroca if (p->replay_window != 0) { 167785b87b2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN not compatible with legacy replay_window"); 168d8647b79SSteffen Klassert return -EINVAL; 169785b87b2SSabrina Dubroca } 170d8647b79SSteffen Klassert 171d8647b79SSteffen Klassert return 0; 172d8647b79SSteffen Klassert } 173df71837dSTrent Jaeger 1741da177e4SLinus Torvalds static int verify_newsa_info(struct xfrm_usersa_info *p, 1756999aae1SSabrina Dubroca struct nlattr **attrs, 1766999aae1SSabrina Dubroca struct netlink_ext_ack *extack) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds int err; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds err = -EINVAL; 1811da177e4SLinus Torvalds switch (p->family) { 1821da177e4SLinus Torvalds case AF_INET: 183b38ff407SAnirudh Gupta break; 184b38ff407SAnirudh Gupta 185b38ff407SAnirudh Gupta case AF_INET6: 186b38ff407SAnirudh Gupta #if IS_ENABLED(CONFIG_IPV6) 187b38ff407SAnirudh Gupta break; 188b38ff407SAnirudh Gupta #else 189b38ff407SAnirudh Gupta err = -EAFNOSUPPORT; 1906999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "IPv6 support disabled"); 191b38ff407SAnirudh Gupta goto out; 192b38ff407SAnirudh Gupta #endif 193b38ff407SAnirudh Gupta 194b38ff407SAnirudh Gupta default: 1956999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid address family"); 196b38ff407SAnirudh Gupta goto out; 197b38ff407SAnirudh Gupta } 198b38ff407SAnirudh Gupta 199b38ff407SAnirudh Gupta switch (p->sel.family) { 200b8d6d007SNicolas Dichtel case AF_UNSPEC: 201b8d6d007SNicolas Dichtel break; 202b8d6d007SNicolas Dichtel 203b38ff407SAnirudh Gupta case AF_INET: 2046999aae1SSabrina Dubroca if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) { 2056999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)"); 20607bf7908SSteffen Klassert goto out; 2076999aae1SSabrina Dubroca } 20807bf7908SSteffen Klassert 2091da177e4SLinus Torvalds break; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds case AF_INET6: 212dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 2136999aae1SSabrina Dubroca if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) { 2146999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)"); 21507bf7908SSteffen Klassert goto out; 2166999aae1SSabrina Dubroca } 21707bf7908SSteffen Klassert 2181da177e4SLinus Torvalds break; 2191da177e4SLinus Torvalds #else 2206999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "IPv6 support disabled"); 2211da177e4SLinus Torvalds err = -EAFNOSUPPORT; 2221da177e4SLinus Torvalds goto out; 2231da177e4SLinus Torvalds #endif 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds default: 2266999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid address family in selector"); 2271da177e4SLinus Torvalds goto out; 2283ff50b79SStephen Hemminger } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds err = -EINVAL; 2311da177e4SLinus Torvalds switch (p->id.proto) { 2321da177e4SLinus Torvalds case IPPROTO_AH: 2336999aae1SSabrina Dubroca if (!attrs[XFRMA_ALG_AUTH] && 2346999aae1SSabrina Dubroca !attrs[XFRMA_ALG_AUTH_TRUNC]) { 2356999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for AH: AUTH_TRUNC or AUTH"); 2366999aae1SSabrina Dubroca goto out; 2376999aae1SSabrina Dubroca } 2386999aae1SSabrina Dubroca 2396999aae1SSabrina Dubroca if (attrs[XFRMA_ALG_AEAD] || 24035a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 24135d2856bSMartin Willi attrs[XFRMA_ALG_COMP] || 2426999aae1SSabrina Dubroca attrs[XFRMA_TFCPAD]) { 2436999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attributes for AH: AEAD, CRYPT, COMP, TFCPAD"); 2441da177e4SLinus Torvalds goto out; 2456999aae1SSabrina Dubroca } 2461da177e4SLinus Torvalds break; 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds case IPPROTO_ESP: 2496999aae1SSabrina Dubroca if (attrs[XFRMA_ALG_COMP]) { 2506999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attribute for ESP: COMP"); 2511a6509d9SHerbert Xu goto out; 2526999aae1SSabrina Dubroca } 2536999aae1SSabrina Dubroca 2541a6509d9SHerbert Xu if (!attrs[XFRMA_ALG_AUTH] && 2554447bb33SMartin Willi !attrs[XFRMA_ALG_AUTH_TRUNC] && 2561a6509d9SHerbert Xu !attrs[XFRMA_ALG_CRYPT] && 2576999aae1SSabrina Dubroca !attrs[XFRMA_ALG_AEAD]) { 2586999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for ESP: at least one of AUTH, AUTH_TRUNC, CRYPT, AEAD"); 2591a6509d9SHerbert Xu goto out; 2606999aae1SSabrina Dubroca } 2616999aae1SSabrina Dubroca 2621a6509d9SHerbert Xu if ((attrs[XFRMA_ALG_AUTH] || 2634447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 2641a6509d9SHerbert Xu attrs[XFRMA_ALG_CRYPT]) && 2656999aae1SSabrina Dubroca attrs[XFRMA_ALG_AEAD]) { 2666999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attribute combination for ESP: AEAD can't be used with AUTH, AUTH_TRUNC, CRYPT"); 2671da177e4SLinus Torvalds goto out; 2686999aae1SSabrina Dubroca } 2696999aae1SSabrina Dubroca 27035d2856bSMartin Willi if (attrs[XFRMA_TFCPAD] && 2716999aae1SSabrina Dubroca p->mode != XFRM_MODE_TUNNEL) { 2726999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "TFC padding can only be used in tunnel mode"); 27335d2856bSMartin Willi goto out; 2746999aae1SSabrina Dubroca } 2751da177e4SLinus Torvalds break; 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds case IPPROTO_COMP: 2786999aae1SSabrina Dubroca if (!attrs[XFRMA_ALG_COMP]) { 2796999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for COMP: COMP"); 2806999aae1SSabrina Dubroca goto out; 2816999aae1SSabrina Dubroca } 2826999aae1SSabrina Dubroca 2836999aae1SSabrina Dubroca if (attrs[XFRMA_ALG_AEAD] || 28435a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 2854447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 28635d2856bSMartin Willi attrs[XFRMA_ALG_CRYPT] || 2876999aae1SSabrina Dubroca attrs[XFRMA_TFCPAD]) { 2886999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attributes for COMP: AEAD, AUTH, AUTH_TRUNC, CRYPT, TFCPAD"); 2891da177e4SLinus Torvalds goto out; 2906999aae1SSabrina Dubroca } 2916999aae1SSabrina Dubroca 2926999aae1SSabrina Dubroca if (ntohl(p->id.spi) >= 0x10000) { 2936999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "SPI is too large for COMP (must be < 0x10000)"); 2946999aae1SSabrina Dubroca goto out; 2956999aae1SSabrina Dubroca } 2961da177e4SLinus Torvalds break; 2971da177e4SLinus Torvalds 298dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 299e23c7194SMasahide NAKAMURA case IPPROTO_DSTOPTS: 300e23c7194SMasahide NAKAMURA case IPPROTO_ROUTING: 30135a7aa08SThomas Graf if (attrs[XFRMA_ALG_COMP] || 30235a7aa08SThomas Graf attrs[XFRMA_ALG_AUTH] || 3034447bb33SMartin Willi attrs[XFRMA_ALG_AUTH_TRUNC] || 3041a6509d9SHerbert Xu attrs[XFRMA_ALG_AEAD] || 30535a7aa08SThomas Graf attrs[XFRMA_ALG_CRYPT] || 30635a7aa08SThomas Graf attrs[XFRMA_ENCAP] || 30735a7aa08SThomas Graf attrs[XFRMA_SEC_CTX] || 3086999aae1SSabrina Dubroca attrs[XFRMA_TFCPAD]) { 3096999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid attributes for DSTOPTS/ROUTING"); 310e23c7194SMasahide NAKAMURA goto out; 3116999aae1SSabrina Dubroca } 3126999aae1SSabrina Dubroca 3136999aae1SSabrina Dubroca if (!attrs[XFRMA_COADDR]) { 3146999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required COADDR attribute for DSTOPTS/ROUTING"); 3156999aae1SSabrina Dubroca goto out; 3166999aae1SSabrina Dubroca } 317e23c7194SMasahide NAKAMURA break; 318e23c7194SMasahide NAKAMURA #endif 319e23c7194SMasahide NAKAMURA 3201da177e4SLinus Torvalds default: 3216999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Unsupported protocol"); 3221da177e4SLinus Torvalds goto out; 3233ff50b79SStephen Hemminger } 3241da177e4SLinus Torvalds 3251fc8fde5SSabrina Dubroca if ((err = verify_aead(attrs, extack))) 3261a6509d9SHerbert Xu goto out; 3271fc8fde5SSabrina Dubroca if ((err = verify_auth_trunc(attrs, extack))) 3284447bb33SMartin Willi goto out; 3291fc8fde5SSabrina Dubroca if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH, extack))) 3301da177e4SLinus Torvalds goto out; 3311fc8fde5SSabrina Dubroca if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT, extack))) 3321da177e4SLinus Torvalds goto out; 3331fc8fde5SSabrina Dubroca if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP, extack))) 3341da177e4SLinus Torvalds goto out; 3356999aae1SSabrina Dubroca if ((err = verify_sec_ctx_len(attrs, extack))) 336df71837dSTrent Jaeger goto out; 337785b87b2SSabrina Dubroca if ((err = verify_replay(p, attrs, extack))) 338d8647b79SSteffen Klassert goto out; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds err = -EINVAL; 3411da177e4SLinus Torvalds switch (p->mode) { 3427e49e6deSMasahide NAKAMURA case XFRM_MODE_TRANSPORT: 3437e49e6deSMasahide NAKAMURA case XFRM_MODE_TUNNEL: 344060f02a3SNoriaki TAKAMIYA case XFRM_MODE_ROUTEOPTIMIZATION: 3450a69452cSDiego Beltrami case XFRM_MODE_BEET: 3461da177e4SLinus Torvalds break; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds default: 3496999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "Unsupported mode"); 3501da177e4SLinus Torvalds goto out; 3513ff50b79SStephen Hemminger } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds err = 0; 3541da177e4SLinus Torvalds 3556999aae1SSabrina Dubroca if (attrs[XFRMA_MTIMER_THRESH]) { 3566999aae1SSabrina Dubroca if (!attrs[XFRMA_ENCAP]) { 3576999aae1SSabrina Dubroca NL_SET_ERR_MSG(extack, "MTIMER_THRESH attribute can only be set on ENCAP states"); 3584e484b3eSAntony Antony err = -EINVAL; 3596999aae1SSabrina Dubroca goto out; 3606999aae1SSabrina Dubroca } 3616999aae1SSabrina Dubroca } 3624e484b3eSAntony Antony 3631da177e4SLinus Torvalds out: 3641da177e4SLinus Torvalds return err; 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, 3686f2f19edSDavid S. Miller struct xfrm_algo_desc *(*get_byname)(const char *, int), 3692b916826SSabrina Dubroca struct nlattr *rta, struct netlink_ext_ack *extack) 3701da177e4SLinus Torvalds { 3711da177e4SLinus Torvalds struct xfrm_algo *p, *ualg; 3721da177e4SLinus Torvalds struct xfrm_algo_desc *algo; 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds if (!rta) 3751da177e4SLinus Torvalds return 0; 3761da177e4SLinus Torvalds 3775424f32eSThomas Graf ualg = nla_data(rta); 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds algo = get_byname(ualg->alg_name, 1); 3802b916826SSabrina Dubroca if (!algo) { 3812b916826SSabrina Dubroca NL_SET_ERR_MSG(extack, "Requested COMP algorithm not found"); 3821da177e4SLinus Torvalds return -ENOSYS; 3832b916826SSabrina Dubroca } 3841da177e4SLinus Torvalds *props = algo->desc.sadb_alg_id; 3851da177e4SLinus Torvalds 3860f99be0dSEric Dumazet p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 3871da177e4SLinus Torvalds if (!p) 3881da177e4SLinus Torvalds return -ENOMEM; 3891da177e4SLinus Torvalds 39004ff1260SHerbert Xu strcpy(p->alg_name, algo->name); 3911da177e4SLinus Torvalds *algpp = p; 3921da177e4SLinus Torvalds return 0; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds 3952b916826SSabrina Dubroca static int attach_crypt(struct xfrm_state *x, struct nlattr *rta, 3962b916826SSabrina Dubroca struct netlink_ext_ack *extack) 39769b0137fSHerbert Xu { 39869b0137fSHerbert Xu struct xfrm_algo *p, *ualg; 39969b0137fSHerbert Xu struct xfrm_algo_desc *algo; 40069b0137fSHerbert Xu 40169b0137fSHerbert Xu if (!rta) 40269b0137fSHerbert Xu return 0; 40369b0137fSHerbert Xu 40469b0137fSHerbert Xu ualg = nla_data(rta); 40569b0137fSHerbert Xu 40669b0137fSHerbert Xu algo = xfrm_ealg_get_byname(ualg->alg_name, 1); 4072b916826SSabrina Dubroca if (!algo) { 4082b916826SSabrina Dubroca NL_SET_ERR_MSG(extack, "Requested CRYPT algorithm not found"); 40969b0137fSHerbert Xu return -ENOSYS; 4102b916826SSabrina Dubroca } 41169b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 41269b0137fSHerbert Xu 41369b0137fSHerbert Xu p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); 41469b0137fSHerbert Xu if (!p) 41569b0137fSHerbert Xu return -ENOMEM; 41669b0137fSHerbert Xu 41769b0137fSHerbert Xu strcpy(p->alg_name, algo->name); 41869b0137fSHerbert Xu x->ealg = p; 41969b0137fSHerbert Xu x->geniv = algo->uinfo.encr.geniv; 42069b0137fSHerbert Xu return 0; 42169b0137fSHerbert Xu } 42269b0137fSHerbert Xu 4234447bb33SMartin Willi static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, 4242b916826SSabrina Dubroca struct nlattr *rta, struct netlink_ext_ack *extack) 4254447bb33SMartin Willi { 4264447bb33SMartin Willi struct xfrm_algo *ualg; 4274447bb33SMartin Willi struct xfrm_algo_auth *p; 4284447bb33SMartin Willi struct xfrm_algo_desc *algo; 4294447bb33SMartin Willi 4304447bb33SMartin Willi if (!rta) 4314447bb33SMartin Willi return 0; 4324447bb33SMartin Willi 4334447bb33SMartin Willi ualg = nla_data(rta); 4344447bb33SMartin Willi 4354447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 4362b916826SSabrina Dubroca if (!algo) { 4372b916826SSabrina Dubroca NL_SET_ERR_MSG(extack, "Requested AUTH algorithm not found"); 4384447bb33SMartin Willi return -ENOSYS; 4392b916826SSabrina Dubroca } 4404447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 4414447bb33SMartin Willi 4424447bb33SMartin Willi p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); 4434447bb33SMartin Willi if (!p) 4444447bb33SMartin Willi return -ENOMEM; 4454447bb33SMartin Willi 4464447bb33SMartin Willi strcpy(p->alg_name, algo->name); 4474447bb33SMartin Willi p->alg_key_len = ualg->alg_key_len; 4484447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 4494447bb33SMartin Willi memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); 4504447bb33SMartin Willi 4514447bb33SMartin Willi *algpp = p; 4524447bb33SMartin Willi return 0; 4534447bb33SMartin Willi } 4544447bb33SMartin Willi 4554447bb33SMartin Willi static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, 4562b916826SSabrina Dubroca struct nlattr *rta, struct netlink_ext_ack *extack) 4574447bb33SMartin Willi { 4584447bb33SMartin Willi struct xfrm_algo_auth *p, *ualg; 4594447bb33SMartin Willi struct xfrm_algo_desc *algo; 4604447bb33SMartin Willi 4614447bb33SMartin Willi if (!rta) 4624447bb33SMartin Willi return 0; 4634447bb33SMartin Willi 4644447bb33SMartin Willi ualg = nla_data(rta); 4654447bb33SMartin Willi 4664447bb33SMartin Willi algo = xfrm_aalg_get_byname(ualg->alg_name, 1); 4672b916826SSabrina Dubroca if (!algo) { 4682b916826SSabrina Dubroca NL_SET_ERR_MSG(extack, "Requested AUTH_TRUNC algorithm not found"); 4694447bb33SMartin Willi return -ENOSYS; 4702b916826SSabrina Dubroca } 4712b916826SSabrina Dubroca if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) { 4722b916826SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid length requested for truncated ICV"); 4734447bb33SMartin Willi return -EINVAL; 4742b916826SSabrina Dubroca } 4754447bb33SMartin Willi *props = algo->desc.sadb_alg_id; 4764447bb33SMartin Willi 4774447bb33SMartin Willi p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); 4784447bb33SMartin Willi if (!p) 4794447bb33SMartin Willi return -ENOMEM; 4804447bb33SMartin Willi 4814447bb33SMartin Willi strcpy(p->alg_name, algo->name); 4824447bb33SMartin Willi if (!p->alg_trunc_len) 4834447bb33SMartin Willi p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; 4844447bb33SMartin Willi 4854447bb33SMartin Willi *algpp = p; 4864447bb33SMartin Willi return 0; 4874447bb33SMartin Willi } 4884447bb33SMartin Willi 4892b916826SSabrina Dubroca static int attach_aead(struct xfrm_state *x, struct nlattr *rta, 4902b916826SSabrina Dubroca struct netlink_ext_ack *extack) 4911a6509d9SHerbert Xu { 4921a6509d9SHerbert Xu struct xfrm_algo_aead *p, *ualg; 4931a6509d9SHerbert Xu struct xfrm_algo_desc *algo; 4941a6509d9SHerbert Xu 4951a6509d9SHerbert Xu if (!rta) 4961a6509d9SHerbert Xu return 0; 4971a6509d9SHerbert Xu 4981a6509d9SHerbert Xu ualg = nla_data(rta); 4991a6509d9SHerbert Xu 5001a6509d9SHerbert Xu algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); 5012b916826SSabrina Dubroca if (!algo) { 5022b916826SSabrina Dubroca NL_SET_ERR_MSG(extack, "Requested AEAD algorithm not found"); 5031a6509d9SHerbert Xu return -ENOSYS; 5042b916826SSabrina Dubroca } 50569b0137fSHerbert Xu x->props.ealgo = algo->desc.sadb_alg_id; 5061a6509d9SHerbert Xu 5071a6509d9SHerbert Xu p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); 5081a6509d9SHerbert Xu if (!p) 5091a6509d9SHerbert Xu return -ENOMEM; 5101a6509d9SHerbert Xu 5111a6509d9SHerbert Xu strcpy(p->alg_name, algo->name); 51269b0137fSHerbert Xu x->aead = p; 51369b0137fSHerbert Xu x->geniv = algo->uinfo.aead.geniv; 5141a6509d9SHerbert Xu return 0; 5151a6509d9SHerbert Xu } 5161a6509d9SHerbert Xu 517e2b19125SSteffen Klassert static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, 518643bc1a2SSabrina Dubroca struct nlattr *rp, 519643bc1a2SSabrina Dubroca struct netlink_ext_ack *extack) 520e2b19125SSteffen Klassert { 521e2b19125SSteffen Klassert struct xfrm_replay_state_esn *up; 5225e708e47SAlexey Dobriyan unsigned int ulen; 523e2b19125SSteffen Klassert 524e2b19125SSteffen Klassert if (!replay_esn || !rp) 525e2b19125SSteffen Klassert return 0; 526e2b19125SSteffen Klassert 527e2b19125SSteffen Klassert up = nla_data(rp); 528ecd79187SMathias Krause ulen = xfrm_replay_state_esn_len(up); 529e2b19125SSteffen Klassert 530f843ee6dSAndy Whitcroft /* Check the overall length and the internal bitmap length to avoid 531f843ee6dSAndy Whitcroft * potential overflow. */ 532643bc1a2SSabrina Dubroca if (nla_len(rp) < (int)ulen) { 533643bc1a2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN attribute is too short"); 534e2b19125SSteffen Klassert return -EINVAL; 535643bc1a2SSabrina Dubroca } 536e2b19125SSteffen Klassert 537643bc1a2SSabrina Dubroca if (xfrm_replay_state_esn_len(replay_esn) != ulen) { 538643bc1a2SSabrina Dubroca NL_SET_ERR_MSG(extack, "New ESN size doesn't match the existing SA's ESN size"); 539677e806dSAndy Whitcroft return -EINVAL; 540643bc1a2SSabrina Dubroca } 541643bc1a2SSabrina Dubroca 542643bc1a2SSabrina Dubroca if (replay_esn->bmp_len != up->bmp_len) { 543643bc1a2SSabrina Dubroca NL_SET_ERR_MSG(extack, "New ESN bitmap size doesn't match the existing SA's ESN bitmap"); 544643bc1a2SSabrina Dubroca return -EINVAL; 545643bc1a2SSabrina Dubroca } 546643bc1a2SSabrina Dubroca 547643bc1a2SSabrina Dubroca if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) { 548643bc1a2SSabrina Dubroca NL_SET_ERR_MSG(extack, "ESN replay window is longer than the bitmap"); 549643bc1a2SSabrina Dubroca return -EINVAL; 550643bc1a2SSabrina Dubroca } 551677e806dSAndy Whitcroft 552e2b19125SSteffen Klassert return 0; 553e2b19125SSteffen Klassert } 554e2b19125SSteffen Klassert 555d8647b79SSteffen Klassert static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, 556d8647b79SSteffen Klassert struct xfrm_replay_state_esn **preplay_esn, 557d8647b79SSteffen Klassert struct nlattr *rta) 558d8647b79SSteffen Klassert { 559d8647b79SSteffen Klassert struct xfrm_replay_state_esn *p, *pp, *up; 5605e708e47SAlexey Dobriyan unsigned int klen, ulen; 561d8647b79SSteffen Klassert 562d8647b79SSteffen Klassert if (!rta) 563d8647b79SSteffen Klassert return 0; 564d8647b79SSteffen Klassert 565d8647b79SSteffen Klassert up = nla_data(rta); 566ecd79187SMathias Krause klen = xfrm_replay_state_esn_len(up); 5675e708e47SAlexey Dobriyan ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up); 568d8647b79SSteffen Klassert 569ecd79187SMathias Krause p = kzalloc(klen, GFP_KERNEL); 570d8647b79SSteffen Klassert if (!p) 571d8647b79SSteffen Klassert return -ENOMEM; 572d8647b79SSteffen Klassert 573ecd79187SMathias Krause pp = kzalloc(klen, GFP_KERNEL); 574d8647b79SSteffen Klassert if (!pp) { 575d8647b79SSteffen Klassert kfree(p); 576d8647b79SSteffen Klassert return -ENOMEM; 577d8647b79SSteffen Klassert } 578d8647b79SSteffen Klassert 579ecd79187SMathias Krause memcpy(p, up, ulen); 580ecd79187SMathias Krause memcpy(pp, up, ulen); 581ecd79187SMathias Krause 582d8647b79SSteffen Klassert *replay_esn = p; 583d8647b79SSteffen Klassert *preplay_esn = pp; 584d8647b79SSteffen Klassert 585d8647b79SSteffen Klassert return 0; 586d8647b79SSteffen Klassert } 587d8647b79SSteffen Klassert 588a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) 589df71837dSTrent Jaeger { 590a1b831f2SAlexey Dobriyan unsigned int len = 0; 591df71837dSTrent Jaeger 592df71837dSTrent Jaeger if (xfrm_ctx) { 593df71837dSTrent Jaeger len += sizeof(struct xfrm_user_sec_ctx); 594df71837dSTrent Jaeger len += xfrm_ctx->ctx_len; 595df71837dSTrent Jaeger } 596df71837dSTrent Jaeger return len; 597df71837dSTrent Jaeger } 598df71837dSTrent Jaeger 5991da177e4SLinus Torvalds static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 6001da177e4SLinus Torvalds { 6011da177e4SLinus Torvalds memcpy(&x->id, &p->id, sizeof(x->id)); 6021da177e4SLinus Torvalds memcpy(&x->sel, &p->sel, sizeof(x->sel)); 6031da177e4SLinus Torvalds memcpy(&x->lft, &p->lft, sizeof(x->lft)); 6041da177e4SLinus Torvalds x->props.mode = p->mode; 60533fce60dSFan Du x->props.replay_window = min_t(unsigned int, p->replay_window, 60633fce60dSFan Du sizeof(x->replay.bitmap) * 8); 6071da177e4SLinus Torvalds x->props.reqid = p->reqid; 6081da177e4SLinus Torvalds x->props.family = p->family; 60954489c14SDavid S. Miller memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); 6101da177e4SLinus Torvalds x->props.flags = p->flags; 611196b0036SHerbert Xu 612ccf9b3b8SSteffen Klassert if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) 613196b0036SHerbert Xu x->sel.family = p->family; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds 616d51d081dSJamal Hadi Salim /* 617d51d081dSJamal Hadi Salim * someday when pfkey also has support, we could have the code 618d51d081dSJamal Hadi Salim * somehow made shareable and move it to xfrm_state.c - JHS 619d51d081dSJamal Hadi Salim * 620d51d081dSJamal Hadi Salim */ 621e3ac104dSMathias Krause static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, 622e3ac104dSMathias Krause int update_esn) 623d51d081dSJamal Hadi Salim { 6245424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 625e3ac104dSMathias Krause struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; 6265424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 6275424f32eSThomas Graf struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 6285424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 6294e484b3eSAntony Antony struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH]; 630d51d081dSJamal Hadi Salim 63100374d9bSLin Ma if (re && x->replay_esn && x->preplay_esn) { 632d8647b79SSteffen Klassert struct xfrm_replay_state_esn *replay_esn; 633d8647b79SSteffen Klassert replay_esn = nla_data(re); 634d8647b79SSteffen Klassert memcpy(x->replay_esn, replay_esn, 635d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 636d8647b79SSteffen Klassert memcpy(x->preplay_esn, replay_esn, 637d8647b79SSteffen Klassert xfrm_replay_state_esn_len(replay_esn)); 638d8647b79SSteffen Klassert } 639d8647b79SSteffen Klassert 640d51d081dSJamal Hadi Salim if (rp) { 641d51d081dSJamal Hadi Salim struct xfrm_replay_state *replay; 6425424f32eSThomas Graf replay = nla_data(rp); 643d51d081dSJamal Hadi Salim memcpy(&x->replay, replay, sizeof(*replay)); 644d51d081dSJamal Hadi Salim memcpy(&x->preplay, replay, sizeof(*replay)); 645d51d081dSJamal Hadi Salim } 646d51d081dSJamal Hadi Salim 647d51d081dSJamal Hadi Salim if (lt) { 648d51d081dSJamal Hadi Salim struct xfrm_lifetime_cur *ltime; 6495424f32eSThomas Graf ltime = nla_data(lt); 650d51d081dSJamal Hadi Salim x->curlft.bytes = ltime->bytes; 651d51d081dSJamal Hadi Salim x->curlft.packets = ltime->packets; 652d51d081dSJamal Hadi Salim x->curlft.add_time = ltime->add_time; 653d51d081dSJamal Hadi Salim x->curlft.use_time = ltime->use_time; 654d51d081dSJamal Hadi Salim } 655d51d081dSJamal Hadi Salim 656cf5cb79fSThomas Graf if (et) 6575424f32eSThomas Graf x->replay_maxage = nla_get_u32(et); 658d51d081dSJamal Hadi Salim 659cf5cb79fSThomas Graf if (rt) 6605424f32eSThomas Graf x->replay_maxdiff = nla_get_u32(rt); 6614e484b3eSAntony Antony 6624e484b3eSAntony Antony if (mt) 6634e484b3eSAntony Antony x->mapping_maxage = nla_get_u32(mt); 664d51d081dSJamal Hadi Salim } 665d51d081dSJamal Hadi Salim 6669b42c1f1SSteffen Klassert static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m) 6679b42c1f1SSteffen Klassert { 6689b42c1f1SSteffen Klassert if (attrs[XFRMA_SET_MARK]) { 6699b42c1f1SSteffen Klassert m->v = nla_get_u32(attrs[XFRMA_SET_MARK]); 6709b42c1f1SSteffen Klassert if (attrs[XFRMA_SET_MARK_MASK]) 6719b42c1f1SSteffen Klassert m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]); 6729b42c1f1SSteffen Klassert else 6739b42c1f1SSteffen Klassert m->m = 0xffffffff; 6749b42c1f1SSteffen Klassert } else { 6759b42c1f1SSteffen Klassert m->v = m->m = 0; 6769b42c1f1SSteffen Klassert } 6779b42c1f1SSteffen Klassert } 6789b42c1f1SSteffen Klassert 679fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_state_construct(struct net *net, 680fc34acd3SAlexey Dobriyan struct xfrm_usersa_info *p, 6815424f32eSThomas Graf struct nlattr **attrs, 682adb5c33eSSabrina Dubroca int *errp, 683adb5c33eSSabrina Dubroca struct netlink_ext_ack *extack) 6841da177e4SLinus Torvalds { 685fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 6861da177e4SLinus Torvalds int err = -ENOMEM; 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds if (!x) 6891da177e4SLinus Torvalds goto error_no_put; 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds copy_from_user_state(x, p); 6921da177e4SLinus Torvalds 6936fd06963SSteffen Klassert if (attrs[XFRMA_ENCAP]) { 6946fd06963SSteffen Klassert x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 6956fd06963SSteffen Klassert sizeof(*x->encap), GFP_KERNEL); 6966fd06963SSteffen Klassert if (x->encap == NULL) 6976fd06963SSteffen Klassert goto error; 6986fd06963SSteffen Klassert } 6996fd06963SSteffen Klassert 7006fd06963SSteffen Klassert if (attrs[XFRMA_COADDR]) { 7016fd06963SSteffen Klassert x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), 7026fd06963SSteffen Klassert sizeof(*x->coaddr), GFP_KERNEL); 7036fd06963SSteffen Klassert if (x->coaddr == NULL) 7046fd06963SSteffen Klassert goto error; 7056fd06963SSteffen Klassert } 7066fd06963SSteffen Klassert 707a947b0a9SNicolas Dichtel if (attrs[XFRMA_SA_EXTRA_FLAGS]) 708a947b0a9SNicolas Dichtel x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); 709a947b0a9SNicolas Dichtel 7102b916826SSabrina Dubroca if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD], extack))) 7111a6509d9SHerbert Xu goto error; 7124447bb33SMartin Willi if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, 7132b916826SSabrina Dubroca attrs[XFRMA_ALG_AUTH_TRUNC], extack))) 7144447bb33SMartin Willi goto error; 7154447bb33SMartin Willi if (!x->props.aalgo) { 7164447bb33SMartin Willi if ((err = attach_auth(&x->aalg, &x->props.aalgo, 7172b916826SSabrina Dubroca attrs[XFRMA_ALG_AUTH], extack))) 7181da177e4SLinus Torvalds goto error; 7194447bb33SMartin Willi } 7202b916826SSabrina Dubroca if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT], extack))) 7211da177e4SLinus Torvalds goto error; 7221da177e4SLinus Torvalds if ((err = attach_one_algo(&x->calg, &x->props.calgo, 7231da177e4SLinus Torvalds xfrm_calg_get_byname, 7242b916826SSabrina Dubroca attrs[XFRMA_ALG_COMP], extack))) 7251da177e4SLinus Torvalds goto error; 726fd21150aSThomas Graf 72735d2856bSMartin Willi if (attrs[XFRMA_TFCPAD]) 72835d2856bSMartin Willi x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); 72935d2856bSMartin Willi 7306f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &x->mark); 7316f26b61eSJamal Hadi Salim 7329b42c1f1SSteffen Klassert xfrm_smark_init(attrs, &x->props.smark); 733077fbac4SLorenzo Colitti 734a3d9001bSKai Lueke if (attrs[XFRMA_IF_ID]) 7357e652640SSteffen Klassert x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 736fd21150aSThomas Graf 737741f9a10SSabrina Dubroca err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV], extack); 7381da177e4SLinus Torvalds if (err) 7391da177e4SLinus Torvalds goto error; 7401da177e4SLinus Torvalds 7412f30ea50SMathias Krause if (attrs[XFRMA_SEC_CTX]) { 7422f30ea50SMathias Krause err = security_xfrm_state_alloc(x, 7432f30ea50SMathias Krause nla_data(attrs[XFRMA_SEC_CTX])); 7442f30ea50SMathias Krause if (err) 745df71837dSTrent Jaeger goto error; 7462f30ea50SMathias Krause } 747df71837dSTrent Jaeger 748d8647b79SSteffen Klassert if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, 749d8647b79SSteffen Klassert attrs[XFRMA_REPLAY_ESN_VAL]))) 750d8647b79SSteffen Klassert goto error; 751d8647b79SSteffen Klassert 7521da177e4SLinus Torvalds x->km.seq = p->seq; 753b27aeadbSAlexey Dobriyan x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; 754d51d081dSJamal Hadi Salim /* sysctl_xfrm_aevent_etime is in 100ms units */ 755b27aeadbSAlexey Dobriyan x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; 756d51d081dSJamal Hadi Salim 7571cf9a3aeSSabrina Dubroca if ((err = xfrm_init_replay(x, extack))) 7589fdc4883SSteffen Klassert goto error; 759d51d081dSJamal Hadi Salim 7609fdc4883SSteffen Klassert /* override default values from above */ 761e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 0); 7621da177e4SLinus Torvalds 763cc01572eSYossi Kuperman /* configure the hardware if offload is requested */ 764cc01572eSYossi Kuperman if (attrs[XFRMA_OFFLOAD_DEV]) { 765cc01572eSYossi Kuperman err = xfrm_dev_state_add(net, x, 766adb5c33eSSabrina Dubroca nla_data(attrs[XFRMA_OFFLOAD_DEV]), 767adb5c33eSSabrina Dubroca extack); 768cc01572eSYossi Kuperman if (err) 769cc01572eSYossi Kuperman goto error; 770cc01572eSYossi Kuperman } 771cc01572eSYossi Kuperman 7721da177e4SLinus Torvalds return x; 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvalds error: 7751da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 7761da177e4SLinus Torvalds xfrm_state_put(x); 7771da177e4SLinus Torvalds error_no_put: 7781da177e4SLinus Torvalds *errp = err; 7791da177e4SLinus Torvalds return NULL; 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 78222e70050SChristoph Hellwig static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 7833bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 7841da177e4SLinus Torvalds { 785fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 7867b67c857SThomas Graf struct xfrm_usersa_info *p = nlmsg_data(nlh); 7871da177e4SLinus Torvalds struct xfrm_state *x; 7881da177e4SLinus Torvalds int err; 78926b15dadSJamal Hadi Salim struct km_event c; 7901da177e4SLinus Torvalds 7916999aae1SSabrina Dubroca err = verify_newsa_info(p, attrs, extack); 7921da177e4SLinus Torvalds if (err) 7931da177e4SLinus Torvalds return err; 7941da177e4SLinus Torvalds 795adb5c33eSSabrina Dubroca x = xfrm_state_construct(net, p, attrs, &err, extack); 7961da177e4SLinus Torvalds if (!x) 7971da177e4SLinus Torvalds return err; 7981da177e4SLinus Torvalds 79926b15dadSJamal Hadi Salim xfrm_state_hold(x); 8001da177e4SLinus Torvalds if (nlh->nlmsg_type == XFRM_MSG_NEWSA) 8011da177e4SLinus Torvalds err = xfrm_state_add(x); 8021da177e4SLinus Torvalds else 8031da177e4SLinus Torvalds err = xfrm_state_update(x); 8041da177e4SLinus Torvalds 8052e71029eSTetsuo Handa xfrm_audit_state_add(x, err ? 0 : 1, true); 806161a09e7SJoy Latten 8071da177e4SLinus Torvalds if (err < 0) { 8081da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 809c5d4d7d8SSteffen Klassert xfrm_dev_state_delete(x); 81021380b81SHerbert Xu __xfrm_state_put(x); 8117d6dfe1fSPatrick McHardy goto out; 8121da177e4SLinus Torvalds } 8131da177e4SLinus Torvalds 814cc01572eSYossi Kuperman if (x->km.state == XFRM_STATE_VOID) 815cc01572eSYossi Kuperman x->km.state = XFRM_STATE_VALID; 816cc01572eSYossi Kuperman 81726b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 81815e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 819f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 82026b15dadSJamal Hadi Salim 82126b15dadSJamal Hadi Salim km_state_notify(x, &c); 8227d6dfe1fSPatrick McHardy out: 82326b15dadSJamal Hadi Salim xfrm_state_put(x); 8241da177e4SLinus Torvalds return err; 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds 827fc34acd3SAlexey Dobriyan static struct xfrm_state *xfrm_user_state_lookup(struct net *net, 828fc34acd3SAlexey Dobriyan struct xfrm_usersa_id *p, 8295424f32eSThomas Graf struct nlattr **attrs, 830eb2971b6SMasahide NAKAMURA int *errp) 831eb2971b6SMasahide NAKAMURA { 832eb2971b6SMasahide NAKAMURA struct xfrm_state *x = NULL; 8336f26b61eSJamal Hadi Salim struct xfrm_mark m; 834eb2971b6SMasahide NAKAMURA int err; 8356f26b61eSJamal Hadi Salim u32 mark = xfrm_mark_get(attrs, &m); 836eb2971b6SMasahide NAKAMURA 837eb2971b6SMasahide NAKAMURA if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { 838eb2971b6SMasahide NAKAMURA err = -ESRCH; 8396f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); 840eb2971b6SMasahide NAKAMURA } else { 841eb2971b6SMasahide NAKAMURA xfrm_address_t *saddr = NULL; 842eb2971b6SMasahide NAKAMURA 84335a7aa08SThomas Graf verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); 844eb2971b6SMasahide NAKAMURA if (!saddr) { 845eb2971b6SMasahide NAKAMURA err = -EINVAL; 846eb2971b6SMasahide NAKAMURA goto out; 847eb2971b6SMasahide NAKAMURA } 848eb2971b6SMasahide NAKAMURA 8499abbffeeSMasahide NAKAMURA err = -ESRCH; 8506f26b61eSJamal Hadi Salim x = xfrm_state_lookup_byaddr(net, mark, 8516f26b61eSJamal Hadi Salim &p->daddr, saddr, 852221df1edSAlexey Dobriyan p->proto, p->family); 853eb2971b6SMasahide NAKAMURA } 854eb2971b6SMasahide NAKAMURA 855eb2971b6SMasahide NAKAMURA out: 856eb2971b6SMasahide NAKAMURA if (!x && errp) 857eb2971b6SMasahide NAKAMURA *errp = err; 858eb2971b6SMasahide NAKAMURA return x; 859eb2971b6SMasahide NAKAMURA } 860eb2971b6SMasahide NAKAMURA 86122e70050SChristoph Hellwig static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 8623bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 8631da177e4SLinus Torvalds { 864fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 8651da177e4SLinus Torvalds struct xfrm_state *x; 866eb2971b6SMasahide NAKAMURA int err = -ESRCH; 86726b15dadSJamal Hadi Salim struct km_event c; 8687b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 8691da177e4SLinus Torvalds 870fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 8711da177e4SLinus Torvalds if (x == NULL) 872eb2971b6SMasahide NAKAMURA return err; 8731da177e4SLinus Torvalds 8746f68dc37SDavid S. Miller if ((err = security_xfrm_state_delete(x)) != 0) 875c8c05a8eSCatherine Zhang goto out; 876c8c05a8eSCatherine Zhang 8771da177e4SLinus Torvalds if (xfrm_state_kern(x)) { 878880e475dSSabrina Dubroca NL_SET_ERR_MSG(extack, "SA is in use by tunnels"); 879c8c05a8eSCatherine Zhang err = -EPERM; 880c8c05a8eSCatherine Zhang goto out; 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds 88326b15dadSJamal Hadi Salim err = xfrm_state_delete(x); 884c8c05a8eSCatherine Zhang if (err < 0) 885c8c05a8eSCatherine Zhang goto out; 88626b15dadSJamal Hadi Salim 88726b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 88815e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 889f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 89026b15dadSJamal Hadi Salim km_state_notify(x, &c); 8911da177e4SLinus Torvalds 892c8c05a8eSCatherine Zhang out: 8932e71029eSTetsuo Handa xfrm_audit_state_delete(x, err ? 0 : 1, true); 894c8c05a8eSCatherine Zhang xfrm_state_put(x); 89526b15dadSJamal Hadi Salim return err; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) 8991da177e4SLinus Torvalds { 900f778a636SMathias Krause memset(p, 0, sizeof(*p)); 9011da177e4SLinus Torvalds memcpy(&p->id, &x->id, sizeof(p->id)); 9021da177e4SLinus Torvalds memcpy(&p->sel, &x->sel, sizeof(p->sel)); 9031da177e4SLinus Torvalds memcpy(&p->lft, &x->lft, sizeof(p->lft)); 904c9fa320bSRaed Salem if (x->xso.dev) 905c9fa320bSRaed Salem xfrm_dev_state_update_curlft(x); 9061da177e4SLinus Torvalds memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); 907e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay_window, &p->stats.replay_window); 908e33d4f13SSowmini Varadhan put_unaligned(x->stats.replay, &p->stats.replay); 909e33d4f13SSowmini Varadhan put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed); 91054489c14SDavid S. Miller memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); 9111da177e4SLinus Torvalds p->mode = x->props.mode; 9121da177e4SLinus Torvalds p->replay_window = x->props.replay_window; 9131da177e4SLinus Torvalds p->reqid = x->props.reqid; 9141da177e4SLinus Torvalds p->family = x->props.family; 9151da177e4SLinus Torvalds p->flags = x->props.flags; 9161da177e4SLinus Torvalds p->seq = x->km.seq; 9171da177e4SLinus Torvalds } 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds struct xfrm_dump_info { 9201da177e4SLinus Torvalds struct sk_buff *in_skb; 9211da177e4SLinus Torvalds struct sk_buff *out_skb; 9221da177e4SLinus Torvalds u32 nlmsg_seq; 9231da177e4SLinus Torvalds u16 nlmsg_flags; 9241da177e4SLinus Torvalds }; 9251da177e4SLinus Torvalds 926c0144beaSThomas Graf static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) 927c0144beaSThomas Graf { 928c0144beaSThomas Graf struct xfrm_user_sec_ctx *uctx; 929c0144beaSThomas Graf struct nlattr *attr; 93068325d3bSHerbert Xu int ctx_size = sizeof(*uctx) + s->ctx_len; 931c0144beaSThomas Graf 932c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); 933c0144beaSThomas Graf if (attr == NULL) 934c0144beaSThomas Graf return -EMSGSIZE; 935c0144beaSThomas Graf 936c0144beaSThomas Graf uctx = nla_data(attr); 937c0144beaSThomas Graf uctx->exttype = XFRMA_SEC_CTX; 938c0144beaSThomas Graf uctx->len = ctx_size; 939c0144beaSThomas Graf uctx->ctx_doi = s->ctx_doi; 940c0144beaSThomas Graf uctx->ctx_alg = s->ctx_alg; 941c0144beaSThomas Graf uctx->ctx_len = s->ctx_len; 942c0144beaSThomas Graf memcpy(uctx + 1, s->ctx_str, s->ctx_len); 943c0144beaSThomas Graf 944c0144beaSThomas Graf return 0; 945c0144beaSThomas Graf } 946c0144beaSThomas Graf 94787e0a94eSLeon Romanovsky static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb) 948d77e38e6SSteffen Klassert { 949d77e38e6SSteffen Klassert struct xfrm_user_offload *xuo; 950d77e38e6SSteffen Klassert struct nlattr *attr; 951d77e38e6SSteffen Klassert 952d77e38e6SSteffen Klassert attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo)); 953d77e38e6SSteffen Klassert if (attr == NULL) 954d77e38e6SSteffen Klassert return -EMSGSIZE; 955d77e38e6SSteffen Klassert 956d77e38e6SSteffen Klassert xuo = nla_data(attr); 9575fe0d4bdSMathias Krause memset(xuo, 0, sizeof(*xuo)); 958d77e38e6SSteffen Klassert xuo->ifindex = xso->dev->ifindex; 959482db2f1SLeon Romanovsky if (xso->dir == XFRM_DEV_OFFLOAD_IN) 960482db2f1SLeon Romanovsky xuo->flags = XFRM_OFFLOAD_INBOUND; 961d14f28b8SLeon Romanovsky if (xso->type == XFRM_DEV_OFFLOAD_PACKET) 962d14f28b8SLeon Romanovsky xuo->flags |= XFRM_OFFLOAD_PACKET; 963d77e38e6SSteffen Klassert 964d77e38e6SSteffen Klassert return 0; 965d77e38e6SSteffen Klassert } 966d77e38e6SSteffen Klassert 967c7a5899eSAntony Antony static bool xfrm_redact(void) 968c7a5899eSAntony Antony { 969c7a5899eSAntony Antony return IS_ENABLED(CONFIG_SECURITY) && 970c7a5899eSAntony Antony security_locked_down(LOCKDOWN_XFRM_SECRET); 971c7a5899eSAntony Antony } 972c7a5899eSAntony Antony 9734447bb33SMartin Willi static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) 9744447bb33SMartin Willi { 9754447bb33SMartin Willi struct xfrm_algo *algo; 976c7a5899eSAntony Antony struct xfrm_algo_auth *ap; 9774447bb33SMartin Willi struct nlattr *nla; 978c7a5899eSAntony Antony bool redact_secret = xfrm_redact(); 9794447bb33SMartin Willi 9804447bb33SMartin Willi nla = nla_reserve(skb, XFRMA_ALG_AUTH, 9814447bb33SMartin Willi sizeof(*algo) + (auth->alg_key_len + 7) / 8); 9824447bb33SMartin Willi if (!nla) 9834447bb33SMartin Willi return -EMSGSIZE; 9844447bb33SMartin Willi algo = nla_data(nla); 9854c87308bSMathias Krause strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); 986c7a5899eSAntony Antony 987c7a5899eSAntony Antony if (redact_secret && auth->alg_key_len) 988c7a5899eSAntony Antony memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8); 989c7a5899eSAntony Antony else 990c7a5899eSAntony Antony memcpy(algo->alg_key, auth->alg_key, 991c7a5899eSAntony Antony (auth->alg_key_len + 7) / 8); 9924447bb33SMartin Willi algo->alg_key_len = auth->alg_key_len; 9934447bb33SMartin Willi 994c7a5899eSAntony Antony nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth)); 995c7a5899eSAntony Antony if (!nla) 996c7a5899eSAntony Antony return -EMSGSIZE; 997c7a5899eSAntony Antony ap = nla_data(nla); 998c7a5899eSAntony Antony memcpy(ap, auth, sizeof(struct xfrm_algo_auth)); 999c7a5899eSAntony Antony if (redact_secret && auth->alg_key_len) 1000c7a5899eSAntony Antony memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8); 1001c7a5899eSAntony Antony else 1002c7a5899eSAntony Antony memcpy(ap->alg_key, auth->alg_key, 1003c7a5899eSAntony Antony (auth->alg_key_len + 7) / 8); 1004c7a5899eSAntony Antony return 0; 1005c7a5899eSAntony Antony } 1006c7a5899eSAntony Antony 1007c7a5899eSAntony Antony static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb) 1008c7a5899eSAntony Antony { 1009c7a5899eSAntony Antony struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead)); 1010c7a5899eSAntony Antony struct xfrm_algo_aead *ap; 1011c7a5899eSAntony Antony bool redact_secret = xfrm_redact(); 1012c7a5899eSAntony Antony 1013c7a5899eSAntony Antony if (!nla) 1014c7a5899eSAntony Antony return -EMSGSIZE; 1015c7a5899eSAntony Antony 1016c7a5899eSAntony Antony ap = nla_data(nla); 10178222d591SHerbert Xu strscpy_pad(ap->alg_name, aead->alg_name, sizeof(ap->alg_name)); 10188222d591SHerbert Xu ap->alg_key_len = aead->alg_key_len; 10198222d591SHerbert Xu ap->alg_icv_len = aead->alg_icv_len; 1020c7a5899eSAntony Antony 1021c7a5899eSAntony Antony if (redact_secret && aead->alg_key_len) 1022c7a5899eSAntony Antony memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8); 1023c7a5899eSAntony Antony else 1024c7a5899eSAntony Antony memcpy(ap->alg_key, aead->alg_key, 1025c7a5899eSAntony Antony (aead->alg_key_len + 7) / 8); 1026c7a5899eSAntony Antony return 0; 1027c7a5899eSAntony Antony } 1028c7a5899eSAntony Antony 1029c7a5899eSAntony Antony static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb) 1030c7a5899eSAntony Antony { 1031c7a5899eSAntony Antony struct xfrm_algo *ap; 1032c7a5899eSAntony Antony bool redact_secret = xfrm_redact(); 1033c7a5899eSAntony Antony struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT, 1034c7a5899eSAntony Antony xfrm_alg_len(ealg)); 1035c7a5899eSAntony Antony if (!nla) 1036c7a5899eSAntony Antony return -EMSGSIZE; 1037c7a5899eSAntony Antony 1038c7a5899eSAntony Antony ap = nla_data(nla); 10398222d591SHerbert Xu strscpy_pad(ap->alg_name, ealg->alg_name, sizeof(ap->alg_name)); 10408222d591SHerbert Xu ap->alg_key_len = ealg->alg_key_len; 1041c7a5899eSAntony Antony 1042c7a5899eSAntony Antony if (redact_secret && ealg->alg_key_len) 1043c7a5899eSAntony Antony memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8); 1044c7a5899eSAntony Antony else 1045c7a5899eSAntony Antony memcpy(ap->alg_key, ealg->alg_key, 1046c7a5899eSAntony Antony (ealg->alg_key_len + 7) / 8); 1047c7a5899eSAntony Antony 10484447bb33SMartin Willi return 0; 10494447bb33SMartin Willi } 10504447bb33SMartin Willi 10518222d591SHerbert Xu static int copy_to_user_calg(struct xfrm_algo *calg, struct sk_buff *skb) 10528222d591SHerbert Xu { 10538222d591SHerbert Xu struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_COMP, sizeof(*calg)); 10548222d591SHerbert Xu struct xfrm_algo *ap; 10558222d591SHerbert Xu 10568222d591SHerbert Xu if (!nla) 10578222d591SHerbert Xu return -EMSGSIZE; 10588222d591SHerbert Xu 10598222d591SHerbert Xu ap = nla_data(nla); 10608222d591SHerbert Xu strscpy_pad(ap->alg_name, calg->alg_name, sizeof(ap->alg_name)); 10618222d591SHerbert Xu ap->alg_key_len = 0; 10628222d591SHerbert Xu 10638222d591SHerbert Xu return 0; 10648222d591SHerbert Xu } 10658222d591SHerbert Xu 10668222d591SHerbert Xu static int copy_to_user_encap(struct xfrm_encap_tmpl *ep, struct sk_buff *skb) 10678222d591SHerbert Xu { 10688222d591SHerbert Xu struct nlattr *nla = nla_reserve(skb, XFRMA_ENCAP, sizeof(*ep)); 10698222d591SHerbert Xu struct xfrm_encap_tmpl *uep; 10708222d591SHerbert Xu 10718222d591SHerbert Xu if (!nla) 10728222d591SHerbert Xu return -EMSGSIZE; 10738222d591SHerbert Xu 10748222d591SHerbert Xu uep = nla_data(nla); 10758222d591SHerbert Xu memset(uep, 0, sizeof(*uep)); 10768222d591SHerbert Xu 10778222d591SHerbert Xu uep->encap_type = ep->encap_type; 10788222d591SHerbert Xu uep->encap_sport = ep->encap_sport; 10798222d591SHerbert Xu uep->encap_dport = ep->encap_dport; 10808222d591SHerbert Xu uep->encap_oa = ep->encap_oa; 10818222d591SHerbert Xu 10828222d591SHerbert Xu return 0; 10838222d591SHerbert Xu } 10848222d591SHerbert Xu 10859b42c1f1SSteffen Klassert static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m) 10869b42c1f1SSteffen Klassert { 10879b42c1f1SSteffen Klassert int ret = 0; 10889b42c1f1SSteffen Klassert 10899b42c1f1SSteffen Klassert if (m->v | m->m) { 10909b42c1f1SSteffen Klassert ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v); 10919b42c1f1SSteffen Klassert if (!ret) 10929b42c1f1SSteffen Klassert ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m); 10939b42c1f1SSteffen Klassert } 10949b42c1f1SSteffen Klassert return ret; 10959b42c1f1SSteffen Klassert } 10969b42c1f1SSteffen Klassert 109768325d3bSHerbert Xu /* Don't change this without updating xfrm_sa_len! */ 109868325d3bSHerbert Xu static int copy_to_user_state_extra(struct xfrm_state *x, 109968325d3bSHerbert Xu struct xfrm_usersa_info *p, 110068325d3bSHerbert Xu struct sk_buff *skb) 11011da177e4SLinus Torvalds { 11021d1e34ddSDavid S. Miller int ret = 0; 11031d1e34ddSDavid S. Miller 11041da177e4SLinus Torvalds copy_to_user_state(x, p); 11051da177e4SLinus Torvalds 1106a947b0a9SNicolas Dichtel if (x->props.extra_flags) { 1107a947b0a9SNicolas Dichtel ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, 1108a947b0a9SNicolas Dichtel x->props.extra_flags); 1109a947b0a9SNicolas Dichtel if (ret) 1110a947b0a9SNicolas Dichtel goto out; 1111a947b0a9SNicolas Dichtel } 1112a947b0a9SNicolas Dichtel 11131d1e34ddSDavid S. Miller if (x->coaddr) { 11141d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); 11151d1e34ddSDavid S. Miller if (ret) 11161d1e34ddSDavid S. Miller goto out; 11171d1e34ddSDavid S. Miller } 11181d1e34ddSDavid S. Miller if (x->lastused) { 1119de95c4a4SNicolas Dichtel ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused, 1120de95c4a4SNicolas Dichtel XFRMA_PAD); 11211d1e34ddSDavid S. Miller if (ret) 11221d1e34ddSDavid S. Miller goto out; 11231d1e34ddSDavid S. Miller } 11241d1e34ddSDavid S. Miller if (x->aead) { 1125c7a5899eSAntony Antony ret = copy_to_user_aead(x->aead, skb); 11261d1e34ddSDavid S. Miller if (ret) 11271d1e34ddSDavid S. Miller goto out; 11281d1e34ddSDavid S. Miller } 11291d1e34ddSDavid S. Miller if (x->aalg) { 11301d1e34ddSDavid S. Miller ret = copy_to_user_auth(x->aalg, skb); 11311d1e34ddSDavid S. Miller if (ret) 11321d1e34ddSDavid S. Miller goto out; 11331d1e34ddSDavid S. Miller } 11341d1e34ddSDavid S. Miller if (x->ealg) { 1135c7a5899eSAntony Antony ret = copy_to_user_ealg(x->ealg, skb); 11361d1e34ddSDavid S. Miller if (ret) 11371d1e34ddSDavid S. Miller goto out; 11381d1e34ddSDavid S. Miller } 11391d1e34ddSDavid S. Miller if (x->calg) { 11408222d591SHerbert Xu ret = copy_to_user_calg(x->calg, skb); 11411d1e34ddSDavid S. Miller if (ret) 11421d1e34ddSDavid S. Miller goto out; 11431d1e34ddSDavid S. Miller } 11441d1e34ddSDavid S. Miller if (x->encap) { 11458222d591SHerbert Xu ret = copy_to_user_encap(x->encap, skb); 11461d1e34ddSDavid S. Miller if (ret) 11471d1e34ddSDavid S. Miller goto out; 11481d1e34ddSDavid S. Miller } 11491d1e34ddSDavid S. Miller if (x->tfcpad) { 11501d1e34ddSDavid S. Miller ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); 11511d1e34ddSDavid S. Miller if (ret) 11521d1e34ddSDavid S. Miller goto out; 11531d1e34ddSDavid S. Miller } 11541d1e34ddSDavid S. Miller ret = xfrm_mark_put(skb, &x->mark); 11551d1e34ddSDavid S. Miller if (ret) 11561d1e34ddSDavid S. Miller goto out; 11579b42c1f1SSteffen Klassert 11589b42c1f1SSteffen Klassert ret = xfrm_smark_put(skb, &x->props.smark); 11599b42c1f1SSteffen Klassert if (ret) 11609b42c1f1SSteffen Klassert goto out; 11619b42c1f1SSteffen Klassert 1162f293a5e3Sdingzhi if (x->replay_esn) 11631d1e34ddSDavid S. Miller ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 1164d0fde795SDavid S. Miller xfrm_replay_state_esn_len(x->replay_esn), 11651d1e34ddSDavid S. Miller x->replay_esn); 1166f293a5e3Sdingzhi else 1167f293a5e3Sdingzhi ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 1168f293a5e3Sdingzhi &x->replay); 11691d1e34ddSDavid S. Miller if (ret) 11701d1e34ddSDavid S. Miller goto out; 1171d77e38e6SSteffen Klassert if(x->xso.dev) 1172d77e38e6SSteffen Klassert ret = copy_user_offload(&x->xso, skb); 1173d77e38e6SSteffen Klassert if (ret) 1174d77e38e6SSteffen Klassert goto out; 11757e652640SSteffen Klassert if (x->if_id) { 11767e652640SSteffen Klassert ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id); 1177077fbac4SLorenzo Colitti if (ret) 1178077fbac4SLorenzo Colitti goto out; 1179077fbac4SLorenzo Colitti } 11804e484b3eSAntony Antony if (x->security) { 11818598112dSSteffen Klassert ret = copy_sec_ctx(x->security, skb); 11824e484b3eSAntony Antony if (ret) 11834e484b3eSAntony Antony goto out; 11844e484b3eSAntony Antony } 11854e484b3eSAntony Antony if (x->mapping_maxage) 11864e484b3eSAntony Antony ret = nla_put_u32(skb, XFRMA_MTIMER_THRESH, x->mapping_maxage); 11871d1e34ddSDavid S. Miller out: 11881d1e34ddSDavid S. Miller return ret; 118968325d3bSHerbert Xu } 119068325d3bSHerbert Xu 119168325d3bSHerbert Xu static int dump_one_state(struct xfrm_state *x, int count, void *ptr) 119268325d3bSHerbert Xu { 119368325d3bSHerbert Xu struct xfrm_dump_info *sp = ptr; 119468325d3bSHerbert Xu struct sk_buff *in_skb = sp->in_skb; 119568325d3bSHerbert Xu struct sk_buff *skb = sp->out_skb; 11965f3eea6bSDmitry Safonov struct xfrm_translator *xtr; 119768325d3bSHerbert Xu struct xfrm_usersa_info *p; 119868325d3bSHerbert Xu struct nlmsghdr *nlh; 119968325d3bSHerbert Xu int err; 120068325d3bSHerbert Xu 120115e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 120268325d3bSHerbert Xu XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); 120368325d3bSHerbert Xu if (nlh == NULL) 120468325d3bSHerbert Xu return -EMSGSIZE; 120568325d3bSHerbert Xu 120668325d3bSHerbert Xu p = nlmsg_data(nlh); 120768325d3bSHerbert Xu 120868325d3bSHerbert Xu err = copy_to_user_state_extra(x, p, skb); 12091d1e34ddSDavid S. Miller if (err) { 12109825069dSThomas Graf nlmsg_cancel(skb, nlh); 121168325d3bSHerbert Xu return err; 12121da177e4SLinus Torvalds } 12131d1e34ddSDavid S. Miller nlmsg_end(skb, nlh); 12145f3eea6bSDmitry Safonov 12155f3eea6bSDmitry Safonov xtr = xfrm_get_translator(); 12165f3eea6bSDmitry Safonov if (xtr) { 12175f3eea6bSDmitry Safonov err = xtr->alloc_compat(skb, nlh); 12185f3eea6bSDmitry Safonov 12195f3eea6bSDmitry Safonov xfrm_put_translator(xtr); 12205f3eea6bSDmitry Safonov if (err) { 12215f3eea6bSDmitry Safonov nlmsg_cancel(skb, nlh); 12225f3eea6bSDmitry Safonov return err; 12235f3eea6bSDmitry Safonov } 12245f3eea6bSDmitry Safonov } 12255f3eea6bSDmitry Safonov 12261d1e34ddSDavid S. Miller return 0; 12271d1e34ddSDavid S. Miller } 12281da177e4SLinus Torvalds 12294c563f76STimo Teras static int xfrm_dump_sa_done(struct netlink_callback *cb) 12304c563f76STimo Teras { 12314c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 1232283bc9f3SFan Du struct sock *sk = cb->skb->sk; 1233283bc9f3SFan Du struct net *net = sock_net(sk); 1234283bc9f3SFan Du 12351ba5bf99SVegard Nossum if (cb->args[0]) 1236283bc9f3SFan Du xfrm_state_walk_done(walk, net); 12374c563f76STimo Teras return 0; 12384c563f76STimo Teras } 12394c563f76STimo Teras 12401da177e4SLinus Torvalds static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) 12411da177e4SLinus Torvalds { 1242fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 12434c563f76STimo Teras struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; 12441da177e4SLinus Torvalds struct xfrm_dump_info info; 12451da177e4SLinus Torvalds 12464c563f76STimo Teras BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > 12474c563f76STimo Teras sizeof(cb->args) - sizeof(cb->args[0])); 12484c563f76STimo Teras 12491da177e4SLinus Torvalds info.in_skb = cb->skb; 12501da177e4SLinus Torvalds info.out_skb = skb; 12511da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 12521da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 12534c563f76STimo Teras 12544c563f76STimo Teras if (!cb->args[0]) { 1255d3623099SNicolas Dichtel struct nlattr *attrs[XFRMA_MAX+1]; 1256870a2df4SNicolas Dichtel struct xfrm_address_filter *filter = NULL; 1257d3623099SNicolas Dichtel u8 proto = 0; 1258d3623099SNicolas Dichtel int err; 1259d3623099SNicolas Dichtel 12608cb08174SJohannes Berg err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX, 12618cb08174SJohannes Berg xfrma_policy, cb->extack); 1262d3623099SNicolas Dichtel if (err < 0) 1263d3623099SNicolas Dichtel return err; 1264d3623099SNicolas Dichtel 1265870a2df4SNicolas Dichtel if (attrs[XFRMA_ADDRESS_FILTER]) { 1266df367561SAndrzej Hajda filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), 1267df367561SAndrzej Hajda sizeof(*filter), GFP_KERNEL); 1268d3623099SNicolas Dichtel if (filter == NULL) 1269d3623099SNicolas Dichtel return -ENOMEM; 1270dfa73c17SLin Ma 1271dfa73c17SLin Ma /* see addr_match(), (prefix length >> 5) << 2 1272dfa73c17SLin Ma * will be used to compare xfrm_address_t 1273dfa73c17SLin Ma */ 1274dfa73c17SLin Ma if (filter->splen > (sizeof(xfrm_address_t) << 3) || 1275dfa73c17SLin Ma filter->dplen > (sizeof(xfrm_address_t) << 3)) { 1276dfa73c17SLin Ma kfree(filter); 1277dfa73c17SLin Ma return -EINVAL; 1278dfa73c17SLin Ma } 1279d3623099SNicolas Dichtel } 1280d3623099SNicolas Dichtel 1281d3623099SNicolas Dichtel if (attrs[XFRMA_PROTO]) 1282d3623099SNicolas Dichtel proto = nla_get_u8(attrs[XFRMA_PROTO]); 1283d3623099SNicolas Dichtel 1284d3623099SNicolas Dichtel xfrm_state_walk_init(walk, proto, filter); 12851ba5bf99SVegard Nossum cb->args[0] = 1; 12864c563f76STimo Teras } 12874c563f76STimo Teras 1288fc34acd3SAlexey Dobriyan (void) xfrm_state_walk(net, walk, dump_one_state, &info); 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds return skb->len; 12911da177e4SLinus Torvalds } 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, 12941da177e4SLinus Torvalds struct xfrm_state *x, u32 seq) 12951da177e4SLinus Torvalds { 12961da177e4SLinus Torvalds struct xfrm_dump_info info; 12971da177e4SLinus Torvalds struct sk_buff *skb; 1298864745d2SMathias Krause int err; 12991da177e4SLinus Torvalds 13007deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 13011da177e4SLinus Torvalds if (!skb) 13021da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds info.in_skb = in_skb; 13051da177e4SLinus Torvalds info.out_skb = skb; 13061da177e4SLinus Torvalds info.nlmsg_seq = seq; 13071da177e4SLinus Torvalds info.nlmsg_flags = 0; 13081da177e4SLinus Torvalds 1309864745d2SMathias Krause err = dump_one_state(x, 0, &info); 1310864745d2SMathias Krause if (err) { 13111da177e4SLinus Torvalds kfree_skb(skb); 1312864745d2SMathias Krause return ERR_PTR(err); 13131da177e4SLinus Torvalds } 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvalds return skb; 13161da177e4SLinus Torvalds } 13171da177e4SLinus Torvalds 131821ee543eSMichal Kubecek /* A wrapper for nlmsg_multicast() checking that nlsk is still available. 131921ee543eSMichal Kubecek * Must be called with RCU read lock. 132021ee543eSMichal Kubecek */ 132121ee543eSMichal Kubecek static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, 132221ee543eSMichal Kubecek u32 pid, unsigned int group) 132321ee543eSMichal Kubecek { 132421ee543eSMichal Kubecek struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); 13255461fc0cSDmitry Safonov struct xfrm_translator *xtr; 132621ee543eSMichal Kubecek 132786126b77SFlorian Westphal if (!nlsk) { 132886126b77SFlorian Westphal kfree_skb(skb); 132986126b77SFlorian Westphal return -EPIPE; 133086126b77SFlorian Westphal } 133186126b77SFlorian Westphal 13325461fc0cSDmitry Safonov xtr = xfrm_get_translator(); 13335461fc0cSDmitry Safonov if (xtr) { 13345461fc0cSDmitry Safonov int err = xtr->alloc_compat(skb, nlmsg_hdr(skb)); 13355461fc0cSDmitry Safonov 13365461fc0cSDmitry Safonov xfrm_put_translator(xtr); 13375461fc0cSDmitry Safonov if (err) { 13385461fc0cSDmitry Safonov kfree_skb(skb); 13395461fc0cSDmitry Safonov return err; 13405461fc0cSDmitry Safonov } 13415461fc0cSDmitry Safonov } 13425461fc0cSDmitry Safonov 134321ee543eSMichal Kubecek return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); 134421ee543eSMichal Kubecek } 134521ee543eSMichal Kubecek 1346a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_spdinfo_msgsize(void) 13477deb2264SThomas Graf { 13487deb2264SThomas Graf return NLMSG_ALIGN(4) 13497deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_spdinfo)) 1350880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhinfo)) 1351880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)) 1352880a6fabSChristophe Gouault + nla_total_size(sizeof(struct xfrmu_spdhthresh)); 13537deb2264SThomas Graf } 13547deb2264SThomas Graf 1355e071041bSAlexey Dobriyan static int build_spdinfo(struct sk_buff *skb, struct net *net, 135615e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 1357ecfd6b18SJamal Hadi Salim { 13585a6d3416SJamal Hadi Salim struct xfrmk_spdinfo si; 13595a6d3416SJamal Hadi Salim struct xfrmu_spdinfo spc; 13605a6d3416SJamal Hadi Salim struct xfrmu_spdhinfo sph; 1361880a6fabSChristophe Gouault struct xfrmu_spdhthresh spt4, spt6; 1362ecfd6b18SJamal Hadi Salim struct nlmsghdr *nlh; 13631d1e34ddSDavid S. Miller int err; 1364ecfd6b18SJamal Hadi Salim u32 *f; 1365880a6fabSChristophe Gouault unsigned lseq; 1366ecfd6b18SJamal Hadi Salim 136715e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); 136825985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 1369ecfd6b18SJamal Hadi Salim return -EMSGSIZE; 1370ecfd6b18SJamal Hadi Salim 1371ecfd6b18SJamal Hadi Salim f = nlmsg_data(nlh); 1372ecfd6b18SJamal Hadi Salim *f = flags; 1373e071041bSAlexey Dobriyan xfrm_spd_getinfo(net, &si); 13745a6d3416SJamal Hadi Salim spc.incnt = si.incnt; 13755a6d3416SJamal Hadi Salim spc.outcnt = si.outcnt; 13765a6d3416SJamal Hadi Salim spc.fwdcnt = si.fwdcnt; 13775a6d3416SJamal Hadi Salim spc.inscnt = si.inscnt; 13785a6d3416SJamal Hadi Salim spc.outscnt = si.outscnt; 13795a6d3416SJamal Hadi Salim spc.fwdscnt = si.fwdscnt; 13805a6d3416SJamal Hadi Salim sph.spdhcnt = si.spdhcnt; 13815a6d3416SJamal Hadi Salim sph.spdhmcnt = si.spdhmcnt; 1382ecfd6b18SJamal Hadi Salim 1383880a6fabSChristophe Gouault do { 1384880a6fabSChristophe Gouault lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); 1385880a6fabSChristophe Gouault 1386880a6fabSChristophe Gouault spt4.lbits = net->xfrm.policy_hthresh.lbits4; 1387880a6fabSChristophe Gouault spt4.rbits = net->xfrm.policy_hthresh.rbits4; 1388880a6fabSChristophe Gouault spt6.lbits = net->xfrm.policy_hthresh.lbits6; 1389880a6fabSChristophe Gouault spt6.rbits = net->xfrm.policy_hthresh.rbits6; 1390880a6fabSChristophe Gouault } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); 1391880a6fabSChristophe Gouault 13921d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); 13931d1e34ddSDavid S. Miller if (!err) 13941d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); 1395880a6fabSChristophe Gouault if (!err) 1396880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); 1397880a6fabSChristophe Gouault if (!err) 1398880a6fabSChristophe Gouault err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); 13991d1e34ddSDavid S. Miller if (err) { 14001d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 14011d1e34ddSDavid S. Miller return err; 14021d1e34ddSDavid S. Miller } 1403ecfd6b18SJamal Hadi Salim 1404053c095aSJohannes Berg nlmsg_end(skb, nlh); 1405053c095aSJohannes Berg return 0; 1406ecfd6b18SJamal Hadi Salim } 1407ecfd6b18SJamal Hadi Salim 1408880a6fabSChristophe Gouault static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 14093bec6c3eSSabrina Dubroca struct nlattr **attrs, 14103bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 1411880a6fabSChristophe Gouault { 1412880a6fabSChristophe Gouault struct net *net = sock_net(skb->sk); 1413880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh4 = NULL; 1414880a6fabSChristophe Gouault struct xfrmu_spdhthresh *thresh6 = NULL; 1415880a6fabSChristophe Gouault 1416880a6fabSChristophe Gouault /* selector prefixlen thresholds to hash policies */ 1417880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { 1418880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; 1419880a6fabSChristophe Gouault 1420a7417216SSabrina Dubroca if (nla_len(rta) < sizeof(*thresh4)) { 1421a7417216SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid SPD_IPV4_HTHRESH attribute length"); 1422880a6fabSChristophe Gouault return -EINVAL; 1423a7417216SSabrina Dubroca } 1424880a6fabSChristophe Gouault thresh4 = nla_data(rta); 1425a7417216SSabrina Dubroca if (thresh4->lbits > 32 || thresh4->rbits > 32) { 1426a7417216SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 32 for IPv4)"); 1427880a6fabSChristophe Gouault return -EINVAL; 1428880a6fabSChristophe Gouault } 1429a7417216SSabrina Dubroca } 1430880a6fabSChristophe Gouault if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { 1431880a6fabSChristophe Gouault struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; 1432880a6fabSChristophe Gouault 1433a7417216SSabrina Dubroca if (nla_len(rta) < sizeof(*thresh6)) { 1434a7417216SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid SPD_IPV6_HTHRESH attribute length"); 1435880a6fabSChristophe Gouault return -EINVAL; 1436a7417216SSabrina Dubroca } 1437880a6fabSChristophe Gouault thresh6 = nla_data(rta); 1438a7417216SSabrina Dubroca if (thresh6->lbits > 128 || thresh6->rbits > 128) { 1439a7417216SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 128 for IPv6)"); 1440880a6fabSChristophe Gouault return -EINVAL; 1441880a6fabSChristophe Gouault } 1442a7417216SSabrina Dubroca } 1443880a6fabSChristophe Gouault 1444880a6fabSChristophe Gouault if (thresh4 || thresh6) { 1445880a6fabSChristophe Gouault write_seqlock(&net->xfrm.policy_hthresh.lock); 1446880a6fabSChristophe Gouault if (thresh4) { 1447880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; 1448880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; 1449880a6fabSChristophe Gouault } 1450880a6fabSChristophe Gouault if (thresh6) { 1451880a6fabSChristophe Gouault net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; 1452880a6fabSChristophe Gouault net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; 1453880a6fabSChristophe Gouault } 1454880a6fabSChristophe Gouault write_sequnlock(&net->xfrm.policy_hthresh.lock); 1455880a6fabSChristophe Gouault 1456880a6fabSChristophe Gouault xfrm_policy_hash_rebuild(net); 1457880a6fabSChristophe Gouault } 1458880a6fabSChristophe Gouault 1459880a6fabSChristophe Gouault return 0; 1460880a6fabSChristophe Gouault } 1461880a6fabSChristophe Gouault 1462ecfd6b18SJamal Hadi Salim static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 14633bec6c3eSSabrina Dubroca struct nlattr **attrs, 14643bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 1465ecfd6b18SJamal Hadi Salim { 1466a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 1467ecfd6b18SJamal Hadi Salim struct sk_buff *r_skb; 14687b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 146915e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 1470ecfd6b18SJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 14712fc5f83bSGustavo A. R. Silva int err; 1472ecfd6b18SJamal Hadi Salim 14737deb2264SThomas Graf r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); 1474ecfd6b18SJamal Hadi Salim if (r_skb == NULL) 1475ecfd6b18SJamal Hadi Salim return -ENOMEM; 1476ecfd6b18SJamal Hadi Salim 14772fc5f83bSGustavo A. R. Silva err = build_spdinfo(r_skb, net, sportid, seq, *flags); 14782fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 1479ecfd6b18SJamal Hadi Salim 148015e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 1481ecfd6b18SJamal Hadi Salim } 1482ecfd6b18SJamal Hadi Salim 1483a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sadinfo_msgsize(void) 14847deb2264SThomas Graf { 14857deb2264SThomas Graf return NLMSG_ALIGN(4) 14867deb2264SThomas Graf + nla_total_size(sizeof(struct xfrmu_sadhinfo)) 14877deb2264SThomas Graf + nla_total_size(4); /* XFRMA_SAD_CNT */ 14887deb2264SThomas Graf } 14897deb2264SThomas Graf 1490e071041bSAlexey Dobriyan static int build_sadinfo(struct sk_buff *skb, struct net *net, 149115e47304SEric W. Biederman u32 portid, u32 seq, u32 flags) 149228d8909bSJamal Hadi Salim { 1493af11e316SJamal Hadi Salim struct xfrmk_sadinfo si; 1494af11e316SJamal Hadi Salim struct xfrmu_sadhinfo sh; 149528d8909bSJamal Hadi Salim struct nlmsghdr *nlh; 14961d1e34ddSDavid S. Miller int err; 149728d8909bSJamal Hadi Salim u32 *f; 149828d8909bSJamal Hadi Salim 149915e47304SEric W. Biederman nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); 150025985edcSLucas De Marchi if (nlh == NULL) /* shouldn't really happen ... */ 150128d8909bSJamal Hadi Salim return -EMSGSIZE; 150228d8909bSJamal Hadi Salim 150328d8909bSJamal Hadi Salim f = nlmsg_data(nlh); 150428d8909bSJamal Hadi Salim *f = flags; 1505e071041bSAlexey Dobriyan xfrm_sad_getinfo(net, &si); 150628d8909bSJamal Hadi Salim 1507af11e316SJamal Hadi Salim sh.sadhmcnt = si.sadhmcnt; 1508af11e316SJamal Hadi Salim sh.sadhcnt = si.sadhcnt; 1509af11e316SJamal Hadi Salim 15101d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); 15111d1e34ddSDavid S. Miller if (!err) 15121d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); 15131d1e34ddSDavid S. Miller if (err) { 15141d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 15151d1e34ddSDavid S. Miller return err; 15161d1e34ddSDavid S. Miller } 151728d8909bSJamal Hadi Salim 1518053c095aSJohannes Berg nlmsg_end(skb, nlh); 1519053c095aSJohannes Berg return 0; 152028d8909bSJamal Hadi Salim } 152128d8909bSJamal Hadi Salim 152228d8909bSJamal Hadi Salim static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 15233bec6c3eSSabrina Dubroca struct nlattr **attrs, 15243bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 152528d8909bSJamal Hadi Salim { 1526a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 152728d8909bSJamal Hadi Salim struct sk_buff *r_skb; 15287b67c857SThomas Graf u32 *flags = nlmsg_data(nlh); 152915e47304SEric W. Biederman u32 sportid = NETLINK_CB(skb).portid; 153028d8909bSJamal Hadi Salim u32 seq = nlh->nlmsg_seq; 15312fc5f83bSGustavo A. R. Silva int err; 153228d8909bSJamal Hadi Salim 15337deb2264SThomas Graf r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); 153428d8909bSJamal Hadi Salim if (r_skb == NULL) 153528d8909bSJamal Hadi Salim return -ENOMEM; 153628d8909bSJamal Hadi Salim 15372fc5f83bSGustavo A. R. Silva err = build_sadinfo(r_skb, net, sportid, seq, *flags); 15382fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 153928d8909bSJamal Hadi Salim 154015e47304SEric W. Biederman return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); 154128d8909bSJamal Hadi Salim } 154228d8909bSJamal Hadi Salim 154322e70050SChristoph Hellwig static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 15443bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 15451da177e4SLinus Torvalds { 1546fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 15477b67c857SThomas Graf struct xfrm_usersa_id *p = nlmsg_data(nlh); 15481da177e4SLinus Torvalds struct xfrm_state *x; 15491da177e4SLinus Torvalds struct sk_buff *resp_skb; 1550eb2971b6SMasahide NAKAMURA int err = -ESRCH; 15511da177e4SLinus Torvalds 1552fc34acd3SAlexey Dobriyan x = xfrm_user_state_lookup(net, p, attrs, &err); 15531da177e4SLinus Torvalds if (x == NULL) 15541da177e4SLinus Torvalds goto out_noput; 15551da177e4SLinus Torvalds 15561da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 15571da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 15581da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 15591da177e4SLinus Torvalds } else { 156015e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 15611da177e4SLinus Torvalds } 15621da177e4SLinus Torvalds xfrm_state_put(x); 15631da177e4SLinus Torvalds out_noput: 15641da177e4SLinus Torvalds return err; 15651da177e4SLinus Torvalds } 15661da177e4SLinus Torvalds 156722e70050SChristoph Hellwig static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, 15683bec6c3eSSabrina Dubroca struct nlattr **attrs, 15693bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 15701da177e4SLinus Torvalds { 1571fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 15721da177e4SLinus Torvalds struct xfrm_state *x; 15731da177e4SLinus Torvalds struct xfrm_userspi_info *p; 15745f3eea6bSDmitry Safonov struct xfrm_translator *xtr; 15751da177e4SLinus Torvalds struct sk_buff *resp_skb; 15761da177e4SLinus Torvalds xfrm_address_t *daddr; 15771da177e4SLinus Torvalds int family; 15781da177e4SLinus Torvalds int err; 15796f26b61eSJamal Hadi Salim u32 mark; 15806f26b61eSJamal Hadi Salim struct xfrm_mark m; 15817e652640SSteffen Klassert u32 if_id = 0; 15821da177e4SLinus Torvalds 15837b67c857SThomas Graf p = nlmsg_data(nlh); 1584c2dad11eSSabrina Dubroca err = verify_spi_info(p->info.id.proto, p->min, p->max, extack); 15851da177e4SLinus Torvalds if (err) 15861da177e4SLinus Torvalds goto out_noput; 15871da177e4SLinus Torvalds 15881da177e4SLinus Torvalds family = p->info.family; 15891da177e4SLinus Torvalds daddr = &p->info.id.daddr; 15901da177e4SLinus Torvalds 15911da177e4SLinus Torvalds x = NULL; 15926f26b61eSJamal Hadi Salim 15936f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 15947e652640SSteffen Klassert 1595a3d9001bSKai Lueke if (attrs[XFRMA_IF_ID]) 15967e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 15977e652640SSteffen Klassert 15981da177e4SLinus Torvalds if (p->info.seq) { 15996f26b61eSJamal Hadi Salim x = xfrm_find_acq_byseq(net, mark, p->info.seq); 160070e94e66SYOSHIFUJI Hideaki / 吉藤英明 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { 16011da177e4SLinus Torvalds xfrm_state_put(x); 16021da177e4SLinus Torvalds x = NULL; 16031da177e4SLinus Torvalds } 16041da177e4SLinus Torvalds } 16051da177e4SLinus Torvalds 16061da177e4SLinus Torvalds if (!x) 16076f26b61eSJamal Hadi Salim x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, 16087e652640SSteffen Klassert if_id, p->info.id.proto, daddr, 16091da177e4SLinus Torvalds &p->info.saddr, 1, 16101da177e4SLinus Torvalds family); 16111da177e4SLinus Torvalds err = -ENOENT; 1612c2dad11eSSabrina Dubroca if (!x) { 1613c2dad11eSSabrina Dubroca NL_SET_ERR_MSG(extack, "Target ACQUIRE not found"); 16141da177e4SLinus Torvalds goto out_noput; 1615c2dad11eSSabrina Dubroca } 16161da177e4SLinus Torvalds 1617c2dad11eSSabrina Dubroca err = xfrm_alloc_spi(x, p->min, p->max, extack); 1618658b219eSHerbert Xu if (err) 1619658b219eSHerbert Xu goto out; 16201da177e4SLinus Torvalds 16211da177e4SLinus Torvalds resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); 16221da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 16231da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 16241da177e4SLinus Torvalds goto out; 16251da177e4SLinus Torvalds } 16261da177e4SLinus Torvalds 16275f3eea6bSDmitry Safonov xtr = xfrm_get_translator(); 16285f3eea6bSDmitry Safonov if (xtr) { 16295f3eea6bSDmitry Safonov err = xtr->alloc_compat(skb, nlmsg_hdr(skb)); 16305f3eea6bSDmitry Safonov 16315f3eea6bSDmitry Safonov xfrm_put_translator(xtr); 16325f3eea6bSDmitry Safonov if (err) { 16335f3eea6bSDmitry Safonov kfree_skb(resp_skb); 16345f3eea6bSDmitry Safonov goto out; 16355f3eea6bSDmitry Safonov } 16365f3eea6bSDmitry Safonov } 16375f3eea6bSDmitry Safonov 163815e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); 16391da177e4SLinus Torvalds 16401da177e4SLinus Torvalds out: 16411da177e4SLinus Torvalds xfrm_state_put(x); 16421da177e4SLinus Torvalds out_noput: 16431da177e4SLinus Torvalds return err; 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds 164624fc544fSSabrina Dubroca static int verify_policy_dir(u8 dir, struct netlink_ext_ack *extack) 16471da177e4SLinus Torvalds { 16481da177e4SLinus Torvalds switch (dir) { 16491da177e4SLinus Torvalds case XFRM_POLICY_IN: 16501da177e4SLinus Torvalds case XFRM_POLICY_OUT: 16511da177e4SLinus Torvalds case XFRM_POLICY_FWD: 16521da177e4SLinus Torvalds break; 16531da177e4SLinus Torvalds 16541da177e4SLinus Torvalds default: 165524fc544fSSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy direction"); 16561da177e4SLinus Torvalds return -EINVAL; 16573ff50b79SStephen Hemminger } 16581da177e4SLinus Torvalds 16591da177e4SLinus Torvalds return 0; 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds 1662fb7deabaSSabrina Dubroca static int verify_policy_type(u8 type, struct netlink_ext_ack *extack) 1663f7b6983fSMasahide NAKAMURA { 1664f7b6983fSMasahide NAKAMURA switch (type) { 1665f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_MAIN: 1666f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 1667f7b6983fSMasahide NAKAMURA case XFRM_POLICY_TYPE_SUB: 1668f7b6983fSMasahide NAKAMURA #endif 1669f7b6983fSMasahide NAKAMURA break; 1670f7b6983fSMasahide NAKAMURA 1671f7b6983fSMasahide NAKAMURA default: 1672fb7deabaSSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy type"); 1673f7b6983fSMasahide NAKAMURA return -EINVAL; 16743ff50b79SStephen Hemminger } 1675f7b6983fSMasahide NAKAMURA 1676f7b6983fSMasahide NAKAMURA return 0; 1677f7b6983fSMasahide NAKAMURA } 1678f7b6983fSMasahide NAKAMURA 1679ec2b4f01SSabrina Dubroca static int verify_newpolicy_info(struct xfrm_userpolicy_info *p, 1680ec2b4f01SSabrina Dubroca struct netlink_ext_ack *extack) 16811da177e4SLinus Torvalds { 1682e682adf0SFan Du int ret; 1683e682adf0SFan Du 16841da177e4SLinus Torvalds switch (p->share) { 16851da177e4SLinus Torvalds case XFRM_SHARE_ANY: 16861da177e4SLinus Torvalds case XFRM_SHARE_SESSION: 16871da177e4SLinus Torvalds case XFRM_SHARE_USER: 16881da177e4SLinus Torvalds case XFRM_SHARE_UNIQUE: 16891da177e4SLinus Torvalds break; 16901da177e4SLinus Torvalds 16911da177e4SLinus Torvalds default: 1692ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy share"); 16931da177e4SLinus Torvalds return -EINVAL; 16943ff50b79SStephen Hemminger } 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvalds switch (p->action) { 16971da177e4SLinus Torvalds case XFRM_POLICY_ALLOW: 16981da177e4SLinus Torvalds case XFRM_POLICY_BLOCK: 16991da177e4SLinus Torvalds break; 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds default: 1702ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid policy action"); 17031da177e4SLinus Torvalds return -EINVAL; 17043ff50b79SStephen Hemminger } 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds switch (p->sel.family) { 17071da177e4SLinus Torvalds case AF_INET: 1708ec2b4f01SSabrina Dubroca if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) { 1709ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)"); 171007bf7908SSteffen Klassert return -EINVAL; 1711ec2b4f01SSabrina Dubroca } 171207bf7908SSteffen Klassert 17131da177e4SLinus Torvalds break; 17141da177e4SLinus Torvalds 17151da177e4SLinus Torvalds case AF_INET6: 1716dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 1717ec2b4f01SSabrina Dubroca if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) { 1718ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)"); 171907bf7908SSteffen Klassert return -EINVAL; 1720ec2b4f01SSabrina Dubroca } 172107bf7908SSteffen Klassert 17221da177e4SLinus Torvalds break; 17231da177e4SLinus Torvalds #else 1724ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "IPv6 support disabled"); 17251da177e4SLinus Torvalds return -EAFNOSUPPORT; 17261da177e4SLinus Torvalds #endif 17271da177e4SLinus Torvalds 17281da177e4SLinus Torvalds default: 1729ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid selector family"); 17301da177e4SLinus Torvalds return -EINVAL; 17313ff50b79SStephen Hemminger } 17321da177e4SLinus Torvalds 173324fc544fSSabrina Dubroca ret = verify_policy_dir(p->dir, extack); 1734e682adf0SFan Du if (ret) 1735e682adf0SFan Du return ret; 1736ec2b4f01SSabrina Dubroca if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) { 1737ec2b4f01SSabrina Dubroca NL_SET_ERR_MSG(extack, "Policy index doesn't match direction"); 1738e682adf0SFan Du return -EINVAL; 1739ec2b4f01SSabrina Dubroca } 1740e682adf0SFan Du 1741e682adf0SFan Du return 0; 17421da177e4SLinus Torvalds } 17431da177e4SLinus Torvalds 17445424f32eSThomas Graf static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) 1745df71837dSTrent Jaeger { 17465424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 1747df71837dSTrent Jaeger struct xfrm_user_sec_ctx *uctx; 1748df71837dSTrent Jaeger 1749df71837dSTrent Jaeger if (!rt) 1750df71837dSTrent Jaeger return 0; 1751df71837dSTrent Jaeger 17525424f32eSThomas Graf uctx = nla_data(rt); 175352a4c640SNikolay Aleksandrov return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); 1754df71837dSTrent Jaeger } 1755df71837dSTrent Jaeger 17561da177e4SLinus Torvalds static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, 17571da177e4SLinus Torvalds int nr) 17581da177e4SLinus Torvalds { 17591da177e4SLinus Torvalds int i; 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds xp->xfrm_nr = nr; 17621da177e4SLinus Torvalds for (i = 0; i < nr; i++, ut++) { 17631da177e4SLinus Torvalds struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); 17661da177e4SLinus Torvalds memcpy(&t->saddr, &ut->saddr, 17671da177e4SLinus Torvalds sizeof(xfrm_address_t)); 17681da177e4SLinus Torvalds t->reqid = ut->reqid; 17691da177e4SLinus Torvalds t->mode = ut->mode; 17701da177e4SLinus Torvalds t->share = ut->share; 17711da177e4SLinus Torvalds t->optional = ut->optional; 17721da177e4SLinus Torvalds t->aalgos = ut->aalgos; 17731da177e4SLinus Torvalds t->ealgos = ut->ealgos; 17741da177e4SLinus Torvalds t->calgos = ut->calgos; 1775c5d18e98SHerbert Xu /* If all masks are ~0, then we allow all algorithms. */ 1776c5d18e98SHerbert Xu t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); 17778511d01dSMiika Komu t->encap_family = ut->family; 17781da177e4SLinus Torvalds } 17791da177e4SLinus Torvalds } 17801da177e4SLinus Torvalds 1781d37bed89SSabrina Dubroca static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family, 17823d776e31STobias Brunner int dir, struct netlink_ext_ack *extack) 1783b4ad86bfSDavid S. Miller { 1784732706afSSteffen Klassert u16 prev_family; 1785b4ad86bfSDavid S. Miller int i; 1786b4ad86bfSDavid S. Miller 1787d37bed89SSabrina Dubroca if (nr > XFRM_MAX_DEPTH) { 1788d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Template count must be <= XFRM_MAX_DEPTH (" __stringify(XFRM_MAX_DEPTH) ")"); 1789b4ad86bfSDavid S. Miller return -EINVAL; 1790d37bed89SSabrina Dubroca } 1791b4ad86bfSDavid S. Miller 1792732706afSSteffen Klassert prev_family = family; 1793732706afSSteffen Klassert 1794b4ad86bfSDavid S. Miller for (i = 0; i < nr; i++) { 1795b4ad86bfSDavid S. Miller /* We never validated the ut->family value, so many 1796b4ad86bfSDavid S. Miller * applications simply leave it at zero. The check was 1797b4ad86bfSDavid S. Miller * never made and ut->family was ignored because all 1798b4ad86bfSDavid S. Miller * templates could be assumed to have the same family as 1799b4ad86bfSDavid S. Miller * the policy itself. Now that we will have ipv4-in-ipv6 1800b4ad86bfSDavid S. Miller * and ipv6-in-ipv4 tunnels, this is no longer true. 1801b4ad86bfSDavid S. Miller */ 1802b4ad86bfSDavid S. Miller if (!ut[i].family) 1803b4ad86bfSDavid S. Miller ut[i].family = family; 1804b4ad86bfSDavid S. Miller 180535e61038SFlorian Westphal switch (ut[i].mode) { 180635e61038SFlorian Westphal case XFRM_MODE_TUNNEL: 180735e61038SFlorian Westphal case XFRM_MODE_BEET: 18083d776e31STobias Brunner if (ut[i].optional && dir == XFRM_POLICY_OUT) { 18093d776e31STobias Brunner NL_SET_ERR_MSG(extack, "Mode in optional template not allowed in outbound policy"); 18103d776e31STobias Brunner return -EINVAL; 18113d776e31STobias Brunner } 181235e61038SFlorian Westphal break; 181335e61038SFlorian Westphal default: 1814d37bed89SSabrina Dubroca if (ut[i].family != prev_family) { 1815d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change"); 1816732706afSSteffen Klassert return -EINVAL; 1817d37bed89SSabrina Dubroca } 181835e61038SFlorian Westphal break; 181935e61038SFlorian Westphal } 1820d37bed89SSabrina Dubroca if (ut[i].mode >= XFRM_MODE_MAX) { 1821d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Mode in template must be < XFRM_MODE_MAX (" __stringify(XFRM_MODE_MAX) ")"); 182232bf94fbSSean Tranchetti return -EINVAL; 1823d37bed89SSabrina Dubroca } 182432bf94fbSSean Tranchetti 1825732706afSSteffen Klassert prev_family = ut[i].family; 1826732706afSSteffen Klassert 1827b4ad86bfSDavid S. Miller switch (ut[i].family) { 1828b4ad86bfSDavid S. Miller case AF_INET: 1829b4ad86bfSDavid S. Miller break; 1830dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 1831b4ad86bfSDavid S. Miller case AF_INET6: 1832b4ad86bfSDavid S. Miller break; 1833b4ad86bfSDavid S. Miller #endif 1834b4ad86bfSDavid S. Miller default: 1835d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid family in template"); 1836b4ad86bfSDavid S. Miller return -EINVAL; 18373ff50b79SStephen Hemminger } 18386a53b759SCong Wang 1839d37bed89SSabrina Dubroca if (!xfrm_id_proto_valid(ut[i].id.proto)) { 1840d37bed89SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid XFRM protocol in template"); 18416a53b759SCong Wang return -EINVAL; 18426a53b759SCong Wang } 1843d37bed89SSabrina Dubroca } 18446a53b759SCong Wang 1845b4ad86bfSDavid S. Miller return 0; 1846b4ad86bfSDavid S. Miller } 1847b4ad86bfSDavid S. Miller 1848d37bed89SSabrina Dubroca static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs, 18493d776e31STobias Brunner int dir, struct netlink_ext_ack *extack) 18501da177e4SLinus Torvalds { 18515424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 18521da177e4SLinus Torvalds 18531da177e4SLinus Torvalds if (!rt) { 18541da177e4SLinus Torvalds pol->xfrm_nr = 0; 18551da177e4SLinus Torvalds } else { 18565424f32eSThomas Graf struct xfrm_user_tmpl *utmpl = nla_data(rt); 18575424f32eSThomas Graf int nr = nla_len(rt) / sizeof(*utmpl); 1858b4ad86bfSDavid S. Miller int err; 18591da177e4SLinus Torvalds 18603d776e31STobias Brunner err = validate_tmpl(nr, utmpl, pol->family, dir, extack); 1861b4ad86bfSDavid S. Miller if (err) 1862b4ad86bfSDavid S. Miller return err; 18631da177e4SLinus Torvalds 18645424f32eSThomas Graf copy_templates(pol, utmpl, nr); 18651da177e4SLinus Torvalds } 18661da177e4SLinus Torvalds return 0; 18671da177e4SLinus Torvalds } 18681da177e4SLinus Torvalds 1869fb7deabaSSabrina Dubroca static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs, 1870fb7deabaSSabrina Dubroca struct netlink_ext_ack *extack) 1871f7b6983fSMasahide NAKAMURA { 18725424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; 1873f7b6983fSMasahide NAKAMURA struct xfrm_userpolicy_type *upt; 1874b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 1875f7b6983fSMasahide NAKAMURA int err; 1876f7b6983fSMasahide NAKAMURA 1877f7b6983fSMasahide NAKAMURA if (rt) { 18785424f32eSThomas Graf upt = nla_data(rt); 1879f7b6983fSMasahide NAKAMURA type = upt->type; 1880f7b6983fSMasahide NAKAMURA } 1881f7b6983fSMasahide NAKAMURA 1882fb7deabaSSabrina Dubroca err = verify_policy_type(type, extack); 1883f7b6983fSMasahide NAKAMURA if (err) 1884f7b6983fSMasahide NAKAMURA return err; 1885f7b6983fSMasahide NAKAMURA 1886f7b6983fSMasahide NAKAMURA *tp = type; 1887f7b6983fSMasahide NAKAMURA return 0; 1888f7b6983fSMasahide NAKAMURA } 1889f7b6983fSMasahide NAKAMURA 18901da177e4SLinus Torvalds static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) 18911da177e4SLinus Torvalds { 18921da177e4SLinus Torvalds xp->priority = p->priority; 18931da177e4SLinus Torvalds xp->index = p->index; 18941da177e4SLinus Torvalds memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); 18951da177e4SLinus Torvalds memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); 18961da177e4SLinus Torvalds xp->action = p->action; 18971da177e4SLinus Torvalds xp->flags = p->flags; 18981da177e4SLinus Torvalds xp->family = p->sel.family; 18991da177e4SLinus Torvalds /* XXX xp->share = p->share; */ 19001da177e4SLinus Torvalds } 19011da177e4SLinus Torvalds 19021da177e4SLinus Torvalds static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) 19031da177e4SLinus Torvalds { 19047b789836SMathias Krause memset(p, 0, sizeof(*p)); 19051da177e4SLinus Torvalds memcpy(&p->sel, &xp->selector, sizeof(p->sel)); 19061da177e4SLinus Torvalds memcpy(&p->lft, &xp->lft, sizeof(p->lft)); 19071da177e4SLinus Torvalds memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); 19081da177e4SLinus Torvalds p->priority = xp->priority; 19091da177e4SLinus Torvalds p->index = xp->index; 19101da177e4SLinus Torvalds p->sel.family = xp->family; 19111da177e4SLinus Torvalds p->dir = dir; 19121da177e4SLinus Torvalds p->action = xp->action; 19131da177e4SLinus Torvalds p->flags = xp->flags; 19141da177e4SLinus Torvalds p->share = XFRM_SHARE_ANY; /* XXX xp->share */ 19151da177e4SLinus Torvalds } 19161da177e4SLinus Torvalds 1917fb7deabaSSabrina Dubroca static struct xfrm_policy *xfrm_policy_construct(struct net *net, 1918fb7deabaSSabrina Dubroca struct xfrm_userpolicy_info *p, 1919fb7deabaSSabrina Dubroca struct nlattr **attrs, 1920fb7deabaSSabrina Dubroca int *errp, 1921fb7deabaSSabrina Dubroca struct netlink_ext_ack *extack) 19221da177e4SLinus Torvalds { 1923fc34acd3SAlexey Dobriyan struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); 19241da177e4SLinus Torvalds int err; 19251da177e4SLinus Torvalds 19261da177e4SLinus Torvalds if (!xp) { 19271da177e4SLinus Torvalds *errp = -ENOMEM; 19281da177e4SLinus Torvalds return NULL; 19291da177e4SLinus Torvalds } 19301da177e4SLinus Torvalds 19311da177e4SLinus Torvalds copy_from_user_policy(xp, p); 1932df71837dSTrent Jaeger 1933fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&xp->type, attrs, extack); 1934f7b6983fSMasahide NAKAMURA if (err) 1935f7b6983fSMasahide NAKAMURA goto error; 1936f7b6983fSMasahide NAKAMURA 19373d776e31STobias Brunner if (!(err = copy_from_user_tmpl(xp, attrs, p->dir, extack))) 193835a7aa08SThomas Graf err = copy_from_user_sec_ctx(xp, attrs); 1939f7b6983fSMasahide NAKAMURA if (err) 1940f7b6983fSMasahide NAKAMURA goto error; 19411da177e4SLinus Torvalds 1942295fae56SJamal Hadi Salim xfrm_mark_get(attrs, &xp->mark); 1943295fae56SJamal Hadi Salim 1944a3d9001bSKai Lueke if (attrs[XFRMA_IF_ID]) 19457e652640SSteffen Klassert xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 19467e652640SSteffen Klassert 1947919e43faSLeon Romanovsky /* configure the hardware if offload is requested */ 1948919e43faSLeon Romanovsky if (attrs[XFRMA_OFFLOAD_DEV]) { 1949919e43faSLeon Romanovsky err = xfrm_dev_policy_add(net, xp, 1950919e43faSLeon Romanovsky nla_data(attrs[XFRMA_OFFLOAD_DEV]), 1951919e43faSLeon Romanovsky p->dir, extack); 1952919e43faSLeon Romanovsky if (err) 1953919e43faSLeon Romanovsky goto error; 1954919e43faSLeon Romanovsky } 1955919e43faSLeon Romanovsky 19561da177e4SLinus Torvalds return xp; 1957f7b6983fSMasahide NAKAMURA error: 1958f7b6983fSMasahide NAKAMURA *errp = err; 195912a169e7SHerbert Xu xp->walk.dead = 1; 196064c31b3fSWANG Cong xfrm_policy_destroy(xp); 1961f7b6983fSMasahide NAKAMURA return NULL; 19621da177e4SLinus Torvalds } 19631da177e4SLinus Torvalds 196422e70050SChristoph Hellwig static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 19653bec6c3eSSabrina Dubroca struct nlattr **attrs, 19663bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 19671da177e4SLinus Torvalds { 1968fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 19697b67c857SThomas Graf struct xfrm_userpolicy_info *p = nlmsg_data(nlh); 19701da177e4SLinus Torvalds struct xfrm_policy *xp; 197126b15dadSJamal Hadi Salim struct km_event c; 19721da177e4SLinus Torvalds int err; 19731da177e4SLinus Torvalds int excl; 19741da177e4SLinus Torvalds 1975ec2b4f01SSabrina Dubroca err = verify_newpolicy_info(p, extack); 19761da177e4SLinus Torvalds if (err) 19771da177e4SLinus Torvalds return err; 197808a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 1979df71837dSTrent Jaeger if (err) 1980df71837dSTrent Jaeger return err; 19811da177e4SLinus Torvalds 1982fb7deabaSSabrina Dubroca xp = xfrm_policy_construct(net, p, attrs, &err, extack); 19831da177e4SLinus Torvalds if (!xp) 19841da177e4SLinus Torvalds return err; 19851da177e4SLinus Torvalds 198625985edcSLucas De Marchi /* shouldn't excl be based on nlh flags?? 198726b15dadSJamal Hadi Salim * Aha! this is anti-netlink really i.e more pfkey derived 1988a7fd0e6dSBhaskar Chowdhury * in netlink excl is a flag and you wouldn't need 198926b15dadSJamal Hadi Salim * a type XFRM_MSG_UPDPOLICY - JHS */ 19901da177e4SLinus Torvalds excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; 19911da177e4SLinus Torvalds err = xfrm_policy_insert(p->dir, xp, excl); 19922e71029eSTetsuo Handa xfrm_audit_policy_add(xp, err ? 0 : 1, true); 1993161a09e7SJoy Latten 19941da177e4SLinus Torvalds if (err) { 1995919e43faSLeon Romanovsky xfrm_dev_policy_delete(xp); 199694b95dfaSLeon Romanovsky xfrm_dev_policy_free(xp); 199703e1ad7bSPaul Moore security_xfrm_policy_free(xp->security); 19981da177e4SLinus Torvalds kfree(xp); 19991da177e4SLinus Torvalds return err; 20001da177e4SLinus Torvalds } 20011da177e4SLinus Torvalds 2002f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 200326b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 200415e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 200526b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 200626b15dadSJamal Hadi Salim 20071da177e4SLinus Torvalds xfrm_pol_put(xp); 20081da177e4SLinus Torvalds 20091da177e4SLinus Torvalds return 0; 20101da177e4SLinus Torvalds } 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) 20131da177e4SLinus Torvalds { 20141da177e4SLinus Torvalds struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; 20151da177e4SLinus Torvalds int i; 20161da177e4SLinus Torvalds 20171da177e4SLinus Torvalds if (xp->xfrm_nr == 0) 20181da177e4SLinus Torvalds return 0; 20191da177e4SLinus Torvalds 2020*1a807e46SNathan Chancellor if (xp->xfrm_nr > XFRM_MAX_DEPTH) 2021*1a807e46SNathan Chancellor return -ENOBUFS; 2022*1a807e46SNathan Chancellor 20231da177e4SLinus Torvalds for (i = 0; i < xp->xfrm_nr; i++) { 20241da177e4SLinus Torvalds struct xfrm_user_tmpl *up = &vec[i]; 20251da177e4SLinus Torvalds struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; 20261da177e4SLinus Torvalds 20271f86840fSMathias Krause memset(up, 0, sizeof(*up)); 20281da177e4SLinus Torvalds memcpy(&up->id, &kp->id, sizeof(up->id)); 20298511d01dSMiika Komu up->family = kp->encap_family; 20301da177e4SLinus Torvalds memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); 20311da177e4SLinus Torvalds up->reqid = kp->reqid; 20321da177e4SLinus Torvalds up->mode = kp->mode; 20331da177e4SLinus Torvalds up->share = kp->share; 20341da177e4SLinus Torvalds up->optional = kp->optional; 20351da177e4SLinus Torvalds up->aalgos = kp->aalgos; 20361da177e4SLinus Torvalds up->ealgos = kp->ealgos; 20371da177e4SLinus Torvalds up->calgos = kp->calgos; 20381da177e4SLinus Torvalds } 20391da177e4SLinus Torvalds 2040c0144beaSThomas Graf return nla_put(skb, XFRMA_TMPL, 2041c0144beaSThomas Graf sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); 2042df71837dSTrent Jaeger } 2043df71837dSTrent Jaeger 20440d681623SSerge Hallyn static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) 20450d681623SSerge Hallyn { 20460d681623SSerge Hallyn if (x->security) { 20470d681623SSerge Hallyn return copy_sec_ctx(x->security, skb); 20480d681623SSerge Hallyn } 20490d681623SSerge Hallyn return 0; 20500d681623SSerge Hallyn } 20510d681623SSerge Hallyn 20520d681623SSerge Hallyn static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) 20530d681623SSerge Hallyn { 20541d1e34ddSDavid S. Miller if (xp->security) 20550d681623SSerge Hallyn return copy_sec_ctx(xp->security, skb); 20560d681623SSerge Hallyn return 0; 20570d681623SSerge Hallyn } 2058a1b831f2SAlexey Dobriyan static inline unsigned int userpolicy_type_attrsize(void) 2059cfbfd45aSThomas Graf { 2060cfbfd45aSThomas Graf #ifdef CONFIG_XFRM_SUB_POLICY 2061cfbfd45aSThomas Graf return nla_total_size(sizeof(struct xfrm_userpolicy_type)); 2062cfbfd45aSThomas Graf #else 2063cfbfd45aSThomas Graf return 0; 2064cfbfd45aSThomas Graf #endif 2065cfbfd45aSThomas Graf } 20660d681623SSerge Hallyn 2067f7b6983fSMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 2068b798a9edSJamal Hadi Salim static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 2069f7b6983fSMasahide NAKAMURA { 207045c180bcSEric Dumazet struct xfrm_userpolicy_type upt; 207145c180bcSEric Dumazet 207245c180bcSEric Dumazet /* Sadly there are two holes in struct xfrm_userpolicy_type */ 207345c180bcSEric Dumazet memset(&upt, 0, sizeof(upt)); 207445c180bcSEric Dumazet upt.type = type; 2075f7b6983fSMasahide NAKAMURA 2076c0144beaSThomas Graf return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); 2077f7b6983fSMasahide NAKAMURA } 2078f7b6983fSMasahide NAKAMURA 2079f7b6983fSMasahide NAKAMURA #else 2080b798a9edSJamal Hadi Salim static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) 2081f7b6983fSMasahide NAKAMURA { 2082f7b6983fSMasahide NAKAMURA return 0; 2083f7b6983fSMasahide NAKAMURA } 2084f7b6983fSMasahide NAKAMURA #endif 2085f7b6983fSMasahide NAKAMURA 20861da177e4SLinus Torvalds static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) 20871da177e4SLinus Torvalds { 20881da177e4SLinus Torvalds struct xfrm_dump_info *sp = ptr; 20891da177e4SLinus Torvalds struct xfrm_userpolicy_info *p; 20901da177e4SLinus Torvalds struct sk_buff *in_skb = sp->in_skb; 20911da177e4SLinus Torvalds struct sk_buff *skb = sp->out_skb; 20925f3eea6bSDmitry Safonov struct xfrm_translator *xtr; 20931da177e4SLinus Torvalds struct nlmsghdr *nlh; 20941d1e34ddSDavid S. Miller int err; 20951da177e4SLinus Torvalds 209615e47304SEric W. Biederman nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, 209779b8b7f4SThomas Graf XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); 209879b8b7f4SThomas Graf if (nlh == NULL) 209979b8b7f4SThomas Graf return -EMSGSIZE; 21001da177e4SLinus Torvalds 21017b67c857SThomas Graf p = nlmsg_data(nlh); 21021da177e4SLinus Torvalds copy_to_user_policy(xp, p, dir); 21031d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 21041d1e34ddSDavid S. Miller if (!err) 21051d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 21061d1e34ddSDavid S. Miller if (!err) 21071d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 21081d1e34ddSDavid S. Miller if (!err) 21091d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 21107e652640SSteffen Klassert if (!err) 21117e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 2112919e43faSLeon Romanovsky if (!err && xp->xdo.dev) 2113919e43faSLeon Romanovsky err = copy_user_offload(&xp->xdo, skb); 21141d1e34ddSDavid S. Miller if (err) { 21151d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 21161d1e34ddSDavid S. Miller return err; 21171d1e34ddSDavid S. Miller } 21189825069dSThomas Graf nlmsg_end(skb, nlh); 21195f3eea6bSDmitry Safonov 21205f3eea6bSDmitry Safonov xtr = xfrm_get_translator(); 21215f3eea6bSDmitry Safonov if (xtr) { 21225f3eea6bSDmitry Safonov err = xtr->alloc_compat(skb, nlh); 21235f3eea6bSDmitry Safonov 21245f3eea6bSDmitry Safonov xfrm_put_translator(xtr); 21255f3eea6bSDmitry Safonov if (err) { 21265f3eea6bSDmitry Safonov nlmsg_cancel(skb, nlh); 21275f3eea6bSDmitry Safonov return err; 21285f3eea6bSDmitry Safonov } 21295f3eea6bSDmitry Safonov } 21305f3eea6bSDmitry Safonov 21311da177e4SLinus Torvalds return 0; 21321da177e4SLinus Torvalds } 21331da177e4SLinus Torvalds 21344c563f76STimo Teras static int xfrm_dump_policy_done(struct netlink_callback *cb) 21354c563f76STimo Teras { 21361137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 2137283bc9f3SFan Du struct net *net = sock_net(cb->skb->sk); 21384c563f76STimo Teras 2139283bc9f3SFan Du xfrm_policy_walk_done(walk, net); 21404c563f76STimo Teras return 0; 21414c563f76STimo Teras } 21424c563f76STimo Teras 21431137b5e2SHerbert Xu static int xfrm_dump_policy_start(struct netlink_callback *cb) 21441137b5e2SHerbert Xu { 21451137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 21461137b5e2SHerbert Xu 21471137b5e2SHerbert Xu BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args)); 21481137b5e2SHerbert Xu 21491137b5e2SHerbert Xu xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); 21501137b5e2SHerbert Xu return 0; 21511137b5e2SHerbert Xu } 21521137b5e2SHerbert Xu 21531da177e4SLinus Torvalds static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) 21541da177e4SLinus Torvalds { 2155fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 21561137b5e2SHerbert Xu struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; 21571da177e4SLinus Torvalds struct xfrm_dump_info info; 21581da177e4SLinus Torvalds 21591da177e4SLinus Torvalds info.in_skb = cb->skb; 21601da177e4SLinus Torvalds info.out_skb = skb; 21611da177e4SLinus Torvalds info.nlmsg_seq = cb->nlh->nlmsg_seq; 21621da177e4SLinus Torvalds info.nlmsg_flags = NLM_F_MULTI; 21634c563f76STimo Teras 2164fc34acd3SAlexey Dobriyan (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); 21651da177e4SLinus Torvalds 21661da177e4SLinus Torvalds return skb->len; 21671da177e4SLinus Torvalds } 21681da177e4SLinus Torvalds 21691da177e4SLinus Torvalds static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 21701da177e4SLinus Torvalds struct xfrm_policy *xp, 21711da177e4SLinus Torvalds int dir, u32 seq) 21721da177e4SLinus Torvalds { 21731da177e4SLinus Torvalds struct xfrm_dump_info info; 21741da177e4SLinus Torvalds struct sk_buff *skb; 2175c2546372SMathias Krause int err; 21761da177e4SLinus Torvalds 21777deb2264SThomas Graf skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 21781da177e4SLinus Torvalds if (!skb) 21791da177e4SLinus Torvalds return ERR_PTR(-ENOMEM); 21801da177e4SLinus Torvalds 21811da177e4SLinus Torvalds info.in_skb = in_skb; 21821da177e4SLinus Torvalds info.out_skb = skb; 21831da177e4SLinus Torvalds info.nlmsg_seq = seq; 21841da177e4SLinus Torvalds info.nlmsg_flags = 0; 21851da177e4SLinus Torvalds 2186c2546372SMathias Krause err = dump_one_policy(xp, dir, 0, &info); 2187c2546372SMathias Krause if (err) { 21881da177e4SLinus Torvalds kfree_skb(skb); 2189c2546372SMathias Krause return ERR_PTR(err); 21901da177e4SLinus Torvalds } 21911da177e4SLinus Torvalds 21921da177e4SLinus Torvalds return skb; 21931da177e4SLinus Torvalds } 21941da177e4SLinus Torvalds 219588d0adb5SNicolas Dichtel static int xfrm_notify_userpolicy(struct net *net) 219688d0adb5SNicolas Dichtel { 219788d0adb5SNicolas Dichtel struct xfrm_userpolicy_default *up; 219888d0adb5SNicolas Dichtel int len = NLMSG_ALIGN(sizeof(*up)); 219988d0adb5SNicolas Dichtel struct nlmsghdr *nlh; 220088d0adb5SNicolas Dichtel struct sk_buff *skb; 220193ec1320SNicolas Dichtel int err; 220288d0adb5SNicolas Dichtel 220388d0adb5SNicolas Dichtel skb = nlmsg_new(len, GFP_ATOMIC); 220488d0adb5SNicolas Dichtel if (skb == NULL) 220588d0adb5SNicolas Dichtel return -ENOMEM; 220688d0adb5SNicolas Dichtel 220788d0adb5SNicolas Dichtel nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0); 220888d0adb5SNicolas Dichtel if (nlh == NULL) { 220988d0adb5SNicolas Dichtel kfree_skb(skb); 221088d0adb5SNicolas Dichtel return -EMSGSIZE; 221188d0adb5SNicolas Dichtel } 221288d0adb5SNicolas Dichtel 221388d0adb5SNicolas Dichtel up = nlmsg_data(nlh); 2214b58b1f56SNicolas Dichtel up->in = net->xfrm.policy_default[XFRM_POLICY_IN]; 2215b58b1f56SNicolas Dichtel up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD]; 2216b58b1f56SNicolas Dichtel up->out = net->xfrm.policy_default[XFRM_POLICY_OUT]; 221788d0adb5SNicolas Dichtel 221888d0adb5SNicolas Dichtel nlmsg_end(skb, nlh); 221988d0adb5SNicolas Dichtel 222093ec1320SNicolas Dichtel rcu_read_lock(); 222193ec1320SNicolas Dichtel err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 222293ec1320SNicolas Dichtel rcu_read_unlock(); 222393ec1320SNicolas Dichtel 222493ec1320SNicolas Dichtel return err; 222588d0adb5SNicolas Dichtel } 222688d0adb5SNicolas Dichtel 2227b58b1f56SNicolas Dichtel static bool xfrm_userpolicy_is_valid(__u8 policy) 2228b58b1f56SNicolas Dichtel { 2229b58b1f56SNicolas Dichtel return policy == XFRM_USERPOLICY_BLOCK || 2230b58b1f56SNicolas Dichtel policy == XFRM_USERPOLICY_ACCEPT; 2231b58b1f56SNicolas Dichtel } 2232b58b1f56SNicolas Dichtel 22332d151d39SSteffen Klassert static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh, 22343bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 22352d151d39SSteffen Klassert { 22362d151d39SSteffen Klassert struct net *net = sock_net(skb->sk); 22372d151d39SSteffen Klassert struct xfrm_userpolicy_default *up = nlmsg_data(nlh); 22382d151d39SSteffen Klassert 2239b58b1f56SNicolas Dichtel if (xfrm_userpolicy_is_valid(up->in)) 2240b58b1f56SNicolas Dichtel net->xfrm.policy_default[XFRM_POLICY_IN] = up->in; 22415d8dbb7fSPavel Skripkin 2242b58b1f56SNicolas Dichtel if (xfrm_userpolicy_is_valid(up->fwd)) 2243b58b1f56SNicolas Dichtel net->xfrm.policy_default[XFRM_POLICY_FWD] = up->fwd; 22445d8dbb7fSPavel Skripkin 2245b58b1f56SNicolas Dichtel if (xfrm_userpolicy_is_valid(up->out)) 2246b58b1f56SNicolas Dichtel net->xfrm.policy_default[XFRM_POLICY_OUT] = up->out; 22472d151d39SSteffen Klassert 22482d151d39SSteffen Klassert rt_genid_bump_all(net); 22492d151d39SSteffen Klassert 225088d0adb5SNicolas Dichtel xfrm_notify_userpolicy(net); 22512d151d39SSteffen Klassert return 0; 22522d151d39SSteffen Klassert } 22532d151d39SSteffen Klassert 22542d151d39SSteffen Klassert static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh, 22553bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 22562d151d39SSteffen Klassert { 22572d151d39SSteffen Klassert struct sk_buff *r_skb; 22582d151d39SSteffen Klassert struct nlmsghdr *r_nlh; 22592d151d39SSteffen Klassert struct net *net = sock_net(skb->sk); 2260f8d858e6SNicolas Dichtel struct xfrm_userpolicy_default *r_up; 22612d151d39SSteffen Klassert int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default)); 22622d151d39SSteffen Klassert u32 portid = NETLINK_CB(skb).portid; 22632d151d39SSteffen Klassert u32 seq = nlh->nlmsg_seq; 22642d151d39SSteffen Klassert 22652d151d39SSteffen Klassert r_skb = nlmsg_new(len, GFP_ATOMIC); 22662d151d39SSteffen Klassert if (!r_skb) 22672d151d39SSteffen Klassert return -ENOMEM; 22682d151d39SSteffen Klassert 22692d151d39SSteffen Klassert r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0); 22702d151d39SSteffen Klassert if (!r_nlh) { 22712d151d39SSteffen Klassert kfree_skb(r_skb); 22722d151d39SSteffen Klassert return -EMSGSIZE; 22732d151d39SSteffen Klassert } 22742d151d39SSteffen Klassert 22752d151d39SSteffen Klassert r_up = nlmsg_data(r_nlh); 2276b58b1f56SNicolas Dichtel r_up->in = net->xfrm.policy_default[XFRM_POLICY_IN]; 2277b58b1f56SNicolas Dichtel r_up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD]; 2278b58b1f56SNicolas Dichtel r_up->out = net->xfrm.policy_default[XFRM_POLICY_OUT]; 22792d151d39SSteffen Klassert nlmsg_end(r_skb, r_nlh); 22802d151d39SSteffen Klassert 22812d151d39SSteffen Klassert return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid); 22822d151d39SSteffen Klassert } 22832d151d39SSteffen Klassert 228422e70050SChristoph Hellwig static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 22853bec6c3eSSabrina Dubroca struct nlattr **attrs, 22863bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 22871da177e4SLinus Torvalds { 2288fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 22891da177e4SLinus Torvalds struct xfrm_policy *xp; 22901da177e4SLinus Torvalds struct xfrm_userpolicy_id *p; 2291b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 22921da177e4SLinus Torvalds int err; 229326b15dadSJamal Hadi Salim struct km_event c; 22941da177e4SLinus Torvalds int delete; 2295295fae56SJamal Hadi Salim struct xfrm_mark m; 22967e652640SSteffen Klassert u32 if_id = 0; 22971da177e4SLinus Torvalds 22987b67c857SThomas Graf p = nlmsg_data(nlh); 22991da177e4SLinus Torvalds delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; 23001da177e4SLinus Torvalds 2301fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 2302f7b6983fSMasahide NAKAMURA if (err) 2303f7b6983fSMasahide NAKAMURA return err; 2304f7b6983fSMasahide NAKAMURA 230524fc544fSSabrina Dubroca err = verify_policy_dir(p->dir, extack); 23061da177e4SLinus Torvalds if (err) 23071da177e4SLinus Torvalds return err; 23081da177e4SLinus Torvalds 23097e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 23107e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 23117e652640SSteffen Klassert 23124f47e8abSXin Long xfrm_mark_get(attrs, &m); 23134f47e8abSXin Long 23141da177e4SLinus Torvalds if (p->index) 23154f47e8abSXin Long xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, 23164f47e8abSXin Long p->index, delete, &err); 2317df71837dSTrent Jaeger else { 23185424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 231903e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 2320df71837dSTrent Jaeger 232108a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 2322df71837dSTrent Jaeger if (err) 2323df71837dSTrent Jaeger return err; 2324df71837dSTrent Jaeger 23252c8dd116SDenis V. Lunev ctx = NULL; 2326df71837dSTrent Jaeger if (rt) { 23275424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 2328df71837dSTrent Jaeger 232952a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 233003e1ad7bSPaul Moore if (err) 2331df71837dSTrent Jaeger return err; 23322c8dd116SDenis V. Lunev } 23334f47e8abSXin Long xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir, 23344f47e8abSXin Long &p->sel, ctx, delete, &err); 233503e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 2336df71837dSTrent Jaeger } 23371da177e4SLinus Torvalds if (xp == NULL) 23381da177e4SLinus Torvalds return -ENOENT; 23391da177e4SLinus Torvalds 23401da177e4SLinus Torvalds if (!delete) { 23411da177e4SLinus Torvalds struct sk_buff *resp_skb; 23421da177e4SLinus Torvalds 23431da177e4SLinus Torvalds resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); 23441da177e4SLinus Torvalds if (IS_ERR(resp_skb)) { 23451da177e4SLinus Torvalds err = PTR_ERR(resp_skb); 23461da177e4SLinus Torvalds } else { 2347a6483b79SAlexey Dobriyan err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, 234815e47304SEric W. Biederman NETLINK_CB(skb).portid); 23491da177e4SLinus Torvalds } 235026b15dadSJamal Hadi Salim } else { 2351982c3acaSLeon Romanovsky xfrm_dev_policy_delete(xp); 23522e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, err ? 0 : 1, true); 235313fcfbb0SDavid S. Miller 235413fcfbb0SDavid S. Miller if (err != 0) 2355c8c05a8eSCatherine Zhang goto out; 235613fcfbb0SDavid S. Miller 2357e7443892SHerbert Xu c.data.byid = p->index; 2358f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 235926b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 236015e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 236126b15dadSJamal Hadi Salim km_policy_notify(xp, p->dir, &c); 23621da177e4SLinus Torvalds } 23631da177e4SLinus Torvalds 2364c8c05a8eSCatherine Zhang out: 2365ef41aaa0SEric Paris xfrm_pol_put(xp); 23661da177e4SLinus Torvalds return err; 23671da177e4SLinus Torvalds } 23681da177e4SLinus Torvalds 236922e70050SChristoph Hellwig static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 23703bec6c3eSSabrina Dubroca struct nlattr **attrs, 23713bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 23721da177e4SLinus Torvalds { 2373fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 237426b15dadSJamal Hadi Salim struct km_event c; 23757b67c857SThomas Graf struct xfrm_usersa_flush *p = nlmsg_data(nlh); 23764aa2e62cSJoy Latten int err; 23771da177e4SLinus Torvalds 2378f75a2804SCong Wang err = xfrm_state_flush(net, p->proto, true, false); 23799e64cc95SJamal Hadi Salim if (err) { 23809e64cc95SJamal Hadi Salim if (err == -ESRCH) /* empty table */ 23819e64cc95SJamal Hadi Salim return 0; 2382069c474eSDavid S. Miller return err; 23839e64cc95SJamal Hadi Salim } 2384bf08867fSHerbert Xu c.data.proto = p->proto; 2385f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 238626b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 238715e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 23887067802eSAlexey Dobriyan c.net = net; 238926b15dadSJamal Hadi Salim km_state_notify(NULL, &c); 239026b15dadSJamal Hadi Salim 23911da177e4SLinus Torvalds return 0; 23921da177e4SLinus Torvalds } 23931da177e4SLinus Torvalds 2394a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x) 23957deb2264SThomas Graf { 2396a1b831f2SAlexey Dobriyan unsigned int replay_size = x->replay_esn ? 2397d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn) : 2398d8647b79SSteffen Klassert sizeof(struct xfrm_replay_state); 2399d8647b79SSteffen Klassert 24007deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) 2401d8647b79SSteffen Klassert + nla_total_size(replay_size) 2402de95c4a4SNicolas Dichtel + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur)) 24036f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 24047deb2264SThomas Graf + nla_total_size(4) /* XFRM_AE_RTHR */ 24057deb2264SThomas Graf + nla_total_size(4); /* XFRM_AE_ETHR */ 24067deb2264SThomas Graf } 2407d51d081dSJamal Hadi Salim 2408214e005bSDavid S. Miller static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 2409d51d081dSJamal Hadi Salim { 2410d51d081dSJamal Hadi Salim struct xfrm_aevent_id *id; 2411d51d081dSJamal Hadi Salim struct nlmsghdr *nlh; 24121d1e34ddSDavid S. Miller int err; 2413d51d081dSJamal Hadi Salim 241415e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); 241579b8b7f4SThomas Graf if (nlh == NULL) 241679b8b7f4SThomas Graf return -EMSGSIZE; 2417d51d081dSJamal Hadi Salim 24187b67c857SThomas Graf id = nlmsg_data(nlh); 2419931e79d7SMathias Krause memset(&id->sa_id, 0, sizeof(id->sa_id)); 24202b5f6dccSJamal Hadi Salim memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); 2421d51d081dSJamal Hadi Salim id->sa_id.spi = x->id.spi; 2422d51d081dSJamal Hadi Salim id->sa_id.family = x->props.family; 2423d51d081dSJamal Hadi Salim id->sa_id.proto = x->id.proto; 24242b5f6dccSJamal Hadi Salim memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); 24252b5f6dccSJamal Hadi Salim id->reqid = x->props.reqid; 2426d51d081dSJamal Hadi Salim id->flags = c->data.aevent; 2427d51d081dSJamal Hadi Salim 2428d0fde795SDavid S. Miller if (x->replay_esn) { 24291d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, 2430d8647b79SSteffen Klassert xfrm_replay_state_esn_len(x->replay_esn), 24311d1e34ddSDavid S. Miller x->replay_esn); 2432d0fde795SDavid S. Miller } else { 24331d1e34ddSDavid S. Miller err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), 24341d1e34ddSDavid S. Miller &x->replay); 2435d0fde795SDavid S. Miller } 24361d1e34ddSDavid S. Miller if (err) 24371d1e34ddSDavid S. Miller goto out_cancel; 2438de95c4a4SNicolas Dichtel err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft, 2439de95c4a4SNicolas Dichtel XFRMA_PAD); 24401d1e34ddSDavid S. Miller if (err) 24411d1e34ddSDavid S. Miller goto out_cancel; 2442d8647b79SSteffen Klassert 24431d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_RTHR) { 24441d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); 24451d1e34ddSDavid S. Miller if (err) 24461d1e34ddSDavid S. Miller goto out_cancel; 24471d1e34ddSDavid S. Miller } 24481d1e34ddSDavid S. Miller if (id->flags & XFRM_AE_ETHR) { 24491d1e34ddSDavid S. Miller err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, 24501d1e34ddSDavid S. Miller x->replay_maxage * 10 / HZ); 24511d1e34ddSDavid S. Miller if (err) 24521d1e34ddSDavid S. Miller goto out_cancel; 24531d1e34ddSDavid S. Miller } 24541d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 24551d1e34ddSDavid S. Miller if (err) 24561d1e34ddSDavid S. Miller goto out_cancel; 24576f26b61eSJamal Hadi Salim 24587e652640SSteffen Klassert err = xfrm_if_id_put(skb, x->if_id); 24597e652640SSteffen Klassert if (err) 24607e652640SSteffen Klassert goto out_cancel; 24617e652640SSteffen Klassert 2462053c095aSJohannes Berg nlmsg_end(skb, nlh); 2463053c095aSJohannes Berg return 0; 2464d51d081dSJamal Hadi Salim 24651d1e34ddSDavid S. Miller out_cancel: 24669825069dSThomas Graf nlmsg_cancel(skb, nlh); 24671d1e34ddSDavid S. Miller return err; 2468d51d081dSJamal Hadi Salim } 2469d51d081dSJamal Hadi Salim 247022e70050SChristoph Hellwig static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 24713bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 2472d51d081dSJamal Hadi Salim { 2473fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2474d51d081dSJamal Hadi Salim struct xfrm_state *x; 2475d51d081dSJamal Hadi Salim struct sk_buff *r_skb; 2476d51d081dSJamal Hadi Salim int err; 2477d51d081dSJamal Hadi Salim struct km_event c; 24786f26b61eSJamal Hadi Salim u32 mark; 24796f26b61eSJamal Hadi Salim struct xfrm_mark m; 24807b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 2481d51d081dSJamal Hadi Salim struct xfrm_usersa_id *id = &p->sa_id; 2482d51d081dSJamal Hadi Salim 24836f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 24846f26b61eSJamal Hadi Salim 24856f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); 2486d8647b79SSteffen Klassert if (x == NULL) 2487d51d081dSJamal Hadi Salim return -ESRCH; 2488d8647b79SSteffen Klassert 2489d8647b79SSteffen Klassert r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 2490d8647b79SSteffen Klassert if (r_skb == NULL) { 2491d8647b79SSteffen Klassert xfrm_state_put(x); 2492d8647b79SSteffen Klassert return -ENOMEM; 2493d51d081dSJamal Hadi Salim } 2494d51d081dSJamal Hadi Salim 2495d51d081dSJamal Hadi Salim /* 2496d51d081dSJamal Hadi Salim * XXX: is this lock really needed - none of the other 2497d51d081dSJamal Hadi Salim * gets lock (the concern is things getting updated 2498d51d081dSJamal Hadi Salim * while we are still reading) - jhs 2499d51d081dSJamal Hadi Salim */ 2500d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 2501d51d081dSJamal Hadi Salim c.data.aevent = p->flags; 2502d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 250315e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 2504d51d081dSJamal Hadi Salim 25052fc5f83bSGustavo A. R. Silva err = build_aevent(r_skb, x, &c); 25062fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 25072fc5f83bSGustavo A. R. Silva 250815e47304SEric W. Biederman err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); 2509d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 2510d51d081dSJamal Hadi Salim xfrm_state_put(x); 2511d51d081dSJamal Hadi Salim return err; 2512d51d081dSJamal Hadi Salim } 2513d51d081dSJamal Hadi Salim 251422e70050SChristoph Hellwig static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 25153bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 2516d51d081dSJamal Hadi Salim { 2517fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2518d51d081dSJamal Hadi Salim struct xfrm_state *x; 2519d51d081dSJamal Hadi Salim struct km_event c; 2520d51d081dSJamal Hadi Salim int err = -EINVAL; 25216f26b61eSJamal Hadi Salim u32 mark = 0; 25226f26b61eSJamal Hadi Salim struct xfrm_mark m; 25237b67c857SThomas Graf struct xfrm_aevent_id *p = nlmsg_data(nlh); 25245424f32eSThomas Graf struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; 2525d8647b79SSteffen Klassert struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; 25265424f32eSThomas Graf struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; 25274e077237SMichael Rossberg struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; 25284e077237SMichael Rossberg struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; 2529d51d081dSJamal Hadi Salim 2530643bc1a2SSabrina Dubroca if (!lt && !rp && !re && !et && !rt) { 2531643bc1a2SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required attribute for AE"); 2532d51d081dSJamal Hadi Salim return err; 2533643bc1a2SSabrina Dubroca } 2534d51d081dSJamal Hadi Salim 2535d51d081dSJamal Hadi Salim /* pedantic mode - thou shalt sayeth replaceth */ 2536643bc1a2SSabrina Dubroca if (!(nlh->nlmsg_flags & NLM_F_REPLACE)) { 2537643bc1a2SSabrina Dubroca NL_SET_ERR_MSG(extack, "NLM_F_REPLACE flag is required"); 2538d51d081dSJamal Hadi Salim return err; 2539643bc1a2SSabrina Dubroca } 2540d51d081dSJamal Hadi Salim 25416f26b61eSJamal Hadi Salim mark = xfrm_mark_get(attrs, &m); 25426f26b61eSJamal Hadi Salim 25436f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); 2544d51d081dSJamal Hadi Salim if (x == NULL) 2545d51d081dSJamal Hadi Salim return -ESRCH; 2546d51d081dSJamal Hadi Salim 2547643bc1a2SSabrina Dubroca if (x->km.state != XFRM_STATE_VALID) { 2548643bc1a2SSabrina Dubroca NL_SET_ERR_MSG(extack, "SA must be in VALID state"); 2549d51d081dSJamal Hadi Salim goto out; 2550643bc1a2SSabrina Dubroca } 2551d51d081dSJamal Hadi Salim 2552643bc1a2SSabrina Dubroca err = xfrm_replay_verify_len(x->replay_esn, re, extack); 2553e2b19125SSteffen Klassert if (err) 2554e2b19125SSteffen Klassert goto out; 2555e2b19125SSteffen Klassert 2556d51d081dSJamal Hadi Salim spin_lock_bh(&x->lock); 2557e3ac104dSMathias Krause xfrm_update_ae_params(x, attrs, 1); 2558d51d081dSJamal Hadi Salim spin_unlock_bh(&x->lock); 2559d51d081dSJamal Hadi Salim 2560d51d081dSJamal Hadi Salim c.event = nlh->nlmsg_type; 2561d51d081dSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 256215e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 2563d51d081dSJamal Hadi Salim c.data.aevent = XFRM_AE_CU; 2564d51d081dSJamal Hadi Salim km_state_notify(x, &c); 2565d51d081dSJamal Hadi Salim err = 0; 2566d51d081dSJamal Hadi Salim out: 2567d51d081dSJamal Hadi Salim xfrm_state_put(x); 2568d51d081dSJamal Hadi Salim return err; 2569d51d081dSJamal Hadi Salim } 2570d51d081dSJamal Hadi Salim 257122e70050SChristoph Hellwig static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 25723bec6c3eSSabrina Dubroca struct nlattr **attrs, 25733bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 25741da177e4SLinus Torvalds { 2575fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 257626b15dadSJamal Hadi Salim struct km_event c; 2577b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 2578f7b6983fSMasahide NAKAMURA int err; 257926b15dadSJamal Hadi Salim 2580fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 2581f7b6983fSMasahide NAKAMURA if (err) 2582f7b6983fSMasahide NAKAMURA return err; 2583f7b6983fSMasahide NAKAMURA 25842e71029eSTetsuo Handa err = xfrm_policy_flush(net, type, true); 25852f1eb65fSJamal Hadi Salim if (err) { 25862f1eb65fSJamal Hadi Salim if (err == -ESRCH) /* empty table */ 25872f1eb65fSJamal Hadi Salim return 0; 2588069c474eSDavid S. Miller return err; 25892f1eb65fSJamal Hadi Salim } 25902f1eb65fSJamal Hadi Salim 2591f7b6983fSMasahide NAKAMURA c.data.type = type; 2592f60f6b8fSHerbert Xu c.event = nlh->nlmsg_type; 259326b15dadSJamal Hadi Salim c.seq = nlh->nlmsg_seq; 259415e47304SEric W. Biederman c.portid = nlh->nlmsg_pid; 25957067802eSAlexey Dobriyan c.net = net; 259626b15dadSJamal Hadi Salim km_policy_notify(NULL, 0, &c); 25971da177e4SLinus Torvalds return 0; 25981da177e4SLinus Torvalds } 25991da177e4SLinus Torvalds 260022e70050SChristoph Hellwig static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 26013bec6c3eSSabrina Dubroca struct nlattr **attrs, 26023bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 26036c5c8ca7SJamal Hadi Salim { 2604fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 26056c5c8ca7SJamal Hadi Salim struct xfrm_policy *xp; 26067b67c857SThomas Graf struct xfrm_user_polexpire *up = nlmsg_data(nlh); 26076c5c8ca7SJamal Hadi Salim struct xfrm_userpolicy_info *p = &up->pol; 2608b798a9edSJamal Hadi Salim u8 type = XFRM_POLICY_TYPE_MAIN; 26096c5c8ca7SJamal Hadi Salim int err = -ENOENT; 2610295fae56SJamal Hadi Salim struct xfrm_mark m; 26117e652640SSteffen Klassert u32 if_id = 0; 26126c5c8ca7SJamal Hadi Salim 2613fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 2614f7b6983fSMasahide NAKAMURA if (err) 2615f7b6983fSMasahide NAKAMURA return err; 2616f7b6983fSMasahide NAKAMURA 261724fc544fSSabrina Dubroca err = verify_policy_dir(p->dir, extack); 2618c8bf4d04STimo Teräs if (err) 2619c8bf4d04STimo Teräs return err; 2620c8bf4d04STimo Teräs 26217e652640SSteffen Klassert if (attrs[XFRMA_IF_ID]) 26227e652640SSteffen Klassert if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 26237e652640SSteffen Klassert 26244f47e8abSXin Long xfrm_mark_get(attrs, &m); 26254f47e8abSXin Long 26266c5c8ca7SJamal Hadi Salim if (p->index) 26274f47e8abSXin Long xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index, 26284f47e8abSXin Long 0, &err); 26296c5c8ca7SJamal Hadi Salim else { 26305424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_SEC_CTX]; 263103e1ad7bSPaul Moore struct xfrm_sec_ctx *ctx; 26326c5c8ca7SJamal Hadi Salim 263308a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 26346c5c8ca7SJamal Hadi Salim if (err) 26356c5c8ca7SJamal Hadi Salim return err; 26366c5c8ca7SJamal Hadi Salim 26372c8dd116SDenis V. Lunev ctx = NULL; 26386c5c8ca7SJamal Hadi Salim if (rt) { 26395424f32eSThomas Graf struct xfrm_user_sec_ctx *uctx = nla_data(rt); 26406c5c8ca7SJamal Hadi Salim 264152a4c640SNikolay Aleksandrov err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); 264203e1ad7bSPaul Moore if (err) 26436c5c8ca7SJamal Hadi Salim return err; 26442c8dd116SDenis V. Lunev } 26454f47e8abSXin Long xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir, 26466f26b61eSJamal Hadi Salim &p->sel, ctx, 0, &err); 264703e1ad7bSPaul Moore security_xfrm_policy_free(ctx); 26486c5c8ca7SJamal Hadi Salim } 26496c5c8ca7SJamal Hadi Salim if (xp == NULL) 2650ef41aaa0SEric Paris return -ENOENT; 265103e1ad7bSPaul Moore 2652ea2dea9dSTimo Teräs if (unlikely(xp->walk.dead)) 26536c5c8ca7SJamal Hadi Salim goto out; 26546c5c8ca7SJamal Hadi Salim 26556c5c8ca7SJamal Hadi Salim err = 0; 26566c5c8ca7SJamal Hadi Salim if (up->hard) { 26576c5c8ca7SJamal Hadi Salim xfrm_policy_delete(xp, p->dir); 26582e71029eSTetsuo Handa xfrm_audit_policy_delete(xp, 1, true); 26596c5c8ca7SJamal Hadi Salim } 2660c6bb8136SEric W. Biederman km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); 26616c5c8ca7SJamal Hadi Salim 26626c5c8ca7SJamal Hadi Salim out: 26636c5c8ca7SJamal Hadi Salim xfrm_pol_put(xp); 26646c5c8ca7SJamal Hadi Salim return err; 26656c5c8ca7SJamal Hadi Salim } 26666c5c8ca7SJamal Hadi Salim 266722e70050SChristoph Hellwig static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, 26683bec6c3eSSabrina Dubroca struct nlattr **attrs, 26693bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 267053bc6b4dSJamal Hadi Salim { 2671fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 267253bc6b4dSJamal Hadi Salim struct xfrm_state *x; 267353bc6b4dSJamal Hadi Salim int err; 26747b67c857SThomas Graf struct xfrm_user_expire *ue = nlmsg_data(nlh); 267553bc6b4dSJamal Hadi Salim struct xfrm_usersa_info *p = &ue->state; 26766f26b61eSJamal Hadi Salim struct xfrm_mark m; 2677928497f0SNicolas Dichtel u32 mark = xfrm_mark_get(attrs, &m); 267853bc6b4dSJamal Hadi Salim 26796f26b61eSJamal Hadi Salim x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); 268053bc6b4dSJamal Hadi Salim 26813a765aa5SDavid S. Miller err = -ENOENT; 268253bc6b4dSJamal Hadi Salim if (x == NULL) 268353bc6b4dSJamal Hadi Salim return err; 268453bc6b4dSJamal Hadi Salim 268553bc6b4dSJamal Hadi Salim spin_lock_bh(&x->lock); 26863a765aa5SDavid S. Miller err = -EINVAL; 2687a25b19f3SSabrina Dubroca if (x->km.state != XFRM_STATE_VALID) { 2688a25b19f3SSabrina Dubroca NL_SET_ERR_MSG(extack, "SA must be in VALID state"); 268953bc6b4dSJamal Hadi Salim goto out; 2690a25b19f3SSabrina Dubroca } 2691a25b19f3SSabrina Dubroca 2692c6bb8136SEric W. Biederman km_state_expired(x, ue->hard, nlh->nlmsg_pid); 269353bc6b4dSJamal Hadi Salim 2694161a09e7SJoy Latten if (ue->hard) { 269553bc6b4dSJamal Hadi Salim __xfrm_state_delete(x); 26962e71029eSTetsuo Handa xfrm_audit_state_delete(x, 1, true); 2697161a09e7SJoy Latten } 26983a765aa5SDavid S. Miller err = 0; 269953bc6b4dSJamal Hadi Salim out: 270053bc6b4dSJamal Hadi Salim spin_unlock_bh(&x->lock); 270153bc6b4dSJamal Hadi Salim xfrm_state_put(x); 270253bc6b4dSJamal Hadi Salim return err; 270353bc6b4dSJamal Hadi Salim } 270453bc6b4dSJamal Hadi Salim 270522e70050SChristoph Hellwig static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, 27063bec6c3eSSabrina Dubroca struct nlattr **attrs, 27073bec6c3eSSabrina Dubroca struct netlink_ext_ack *extack) 2708980ebd25SJamal Hadi Salim { 2709fc34acd3SAlexey Dobriyan struct net *net = sock_net(skb->sk); 2710980ebd25SJamal Hadi Salim struct xfrm_policy *xp; 2711980ebd25SJamal Hadi Salim struct xfrm_user_tmpl *ut; 2712980ebd25SJamal Hadi Salim int i; 27135424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_TMPL]; 27146f26b61eSJamal Hadi Salim struct xfrm_mark mark; 2715980ebd25SJamal Hadi Salim 27167b67c857SThomas Graf struct xfrm_user_acquire *ua = nlmsg_data(nlh); 2717fc34acd3SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 2718980ebd25SJamal Hadi Salim int err = -ENOMEM; 2719980ebd25SJamal Hadi Salim 2720980ebd25SJamal Hadi Salim if (!x) 2721d8eb9307SIlpo Järvinen goto nomem; 2722980ebd25SJamal Hadi Salim 27236f26b61eSJamal Hadi Salim xfrm_mark_get(attrs, &mark); 27246f26b61eSJamal Hadi Salim 2725ec2b4f01SSabrina Dubroca err = verify_newpolicy_info(&ua->policy, extack); 2726d8eb9307SIlpo Järvinen if (err) 272773efc324SVegard Nossum goto free_state; 272808a717e4SSabrina Dubroca err = verify_sec_ctx_len(attrs, extack); 2729a1a7e3a3SXin Long if (err) 2730a1a7e3a3SXin Long goto free_state; 2731980ebd25SJamal Hadi Salim 2732980ebd25SJamal Hadi Salim /* build an XP */ 2733fb7deabaSSabrina Dubroca xp = xfrm_policy_construct(net, &ua->policy, attrs, &err, extack); 2734d8eb9307SIlpo Järvinen if (!xp) 2735d8eb9307SIlpo Järvinen goto free_state; 2736980ebd25SJamal Hadi Salim 2737980ebd25SJamal Hadi Salim memcpy(&x->id, &ua->id, sizeof(ua->id)); 2738980ebd25SJamal Hadi Salim memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); 2739980ebd25SJamal Hadi Salim memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); 27406f26b61eSJamal Hadi Salim xp->mark.m = x->mark.m = mark.m; 27416f26b61eSJamal Hadi Salim xp->mark.v = x->mark.v = mark.v; 27425424f32eSThomas Graf ut = nla_data(rt); 2743980ebd25SJamal Hadi Salim /* extract the templates and for each call km_key */ 2744980ebd25SJamal Hadi Salim for (i = 0; i < xp->xfrm_nr; i++, ut++) { 2745980ebd25SJamal Hadi Salim struct xfrm_tmpl *t = &xp->xfrm_vec[i]; 2746980ebd25SJamal Hadi Salim memcpy(&x->id, &t->id, sizeof(x->id)); 2747980ebd25SJamal Hadi Salim x->props.mode = t->mode; 2748980ebd25SJamal Hadi Salim x->props.reqid = t->reqid; 2749980ebd25SJamal Hadi Salim x->props.family = ut->family; 2750980ebd25SJamal Hadi Salim t->aalgos = ua->aalgos; 2751980ebd25SJamal Hadi Salim t->ealgos = ua->ealgos; 2752980ebd25SJamal Hadi Salim t->calgos = ua->calgos; 2753980ebd25SJamal Hadi Salim err = km_query(x, t, xp); 2754980ebd25SJamal Hadi Salim 2755980ebd25SJamal Hadi Salim } 2756980ebd25SJamal Hadi Salim 27574a135e53SMathias Krause xfrm_state_free(x); 2758980ebd25SJamal Hadi Salim kfree(xp); 2759980ebd25SJamal Hadi Salim 2760980ebd25SJamal Hadi Salim return 0; 2761d8eb9307SIlpo Järvinen 2762d8eb9307SIlpo Järvinen free_state: 27634a135e53SMathias Krause xfrm_state_free(x); 2764d8eb9307SIlpo Järvinen nomem: 2765d8eb9307SIlpo Järvinen return err; 2766980ebd25SJamal Hadi Salim } 2767980ebd25SJamal Hadi Salim 27685c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 27695c79de6eSShinta Sugimoto static int copy_from_user_migrate(struct xfrm_migrate *ma, 277013c1d189SArnaud Ebalard struct xfrm_kmaddress *k, 2771bd122403SSabrina Dubroca struct nlattr **attrs, int *num, 2772bd122403SSabrina Dubroca struct netlink_ext_ack *extack) 27735c79de6eSShinta Sugimoto { 27745424f32eSThomas Graf struct nlattr *rt = attrs[XFRMA_MIGRATE]; 27755c79de6eSShinta Sugimoto struct xfrm_user_migrate *um; 27765c79de6eSShinta Sugimoto int i, num_migrate; 27775c79de6eSShinta Sugimoto 277813c1d189SArnaud Ebalard if (k != NULL) { 277913c1d189SArnaud Ebalard struct xfrm_user_kmaddress *uk; 278013c1d189SArnaud Ebalard 278113c1d189SArnaud Ebalard uk = nla_data(attrs[XFRMA_KMADDRESS]); 278213c1d189SArnaud Ebalard memcpy(&k->local, &uk->local, sizeof(k->local)); 278313c1d189SArnaud Ebalard memcpy(&k->remote, &uk->remote, sizeof(k->remote)); 278413c1d189SArnaud Ebalard k->family = uk->family; 278513c1d189SArnaud Ebalard k->reserved = uk->reserved; 278613c1d189SArnaud Ebalard } 278713c1d189SArnaud Ebalard 27885424f32eSThomas Graf um = nla_data(rt); 27895424f32eSThomas Graf num_migrate = nla_len(rt) / sizeof(*um); 27905c79de6eSShinta Sugimoto 2791bd122403SSabrina Dubroca if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) { 2792bd122403SSabrina Dubroca NL_SET_ERR_MSG(extack, "Invalid number of SAs to migrate, must be 0 < num <= XFRM_MAX_DEPTH (6)"); 27935c79de6eSShinta Sugimoto return -EINVAL; 2794bd122403SSabrina Dubroca } 27955c79de6eSShinta Sugimoto 27965c79de6eSShinta Sugimoto for (i = 0; i < num_migrate; i++, um++, ma++) { 27975c79de6eSShinta Sugimoto memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); 27985c79de6eSShinta Sugimoto memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); 27995c79de6eSShinta Sugimoto memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); 28005c79de6eSShinta Sugimoto memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); 28015c79de6eSShinta Sugimoto 28025c79de6eSShinta Sugimoto ma->proto = um->proto; 28035c79de6eSShinta Sugimoto ma->mode = um->mode; 28045c79de6eSShinta Sugimoto ma->reqid = um->reqid; 28055c79de6eSShinta Sugimoto 28065c79de6eSShinta Sugimoto ma->old_family = um->old_family; 28075c79de6eSShinta Sugimoto ma->new_family = um->new_family; 28085c79de6eSShinta Sugimoto } 28095c79de6eSShinta Sugimoto 28105c79de6eSShinta Sugimoto *num = i; 28115c79de6eSShinta Sugimoto return 0; 28125c79de6eSShinta Sugimoto } 28135c79de6eSShinta Sugimoto 28145c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 28153bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 28165c79de6eSShinta Sugimoto { 28177b67c857SThomas Graf struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); 28185c79de6eSShinta Sugimoto struct xfrm_migrate m[XFRM_MAX_DEPTH]; 281913c1d189SArnaud Ebalard struct xfrm_kmaddress km, *kmp; 28205c79de6eSShinta Sugimoto u8 type; 28215c79de6eSShinta Sugimoto int err; 28225c79de6eSShinta Sugimoto int n = 0; 28238d549c4fSFan Du struct net *net = sock_net(skb->sk); 28244ab47d47SAntony Antony struct xfrm_encap_tmpl *encap = NULL; 2825c1aca308SYan Yan u32 if_id = 0; 28265c79de6eSShinta Sugimoto 2827bd122403SSabrina Dubroca if (!attrs[XFRMA_MIGRATE]) { 2828bd122403SSabrina Dubroca NL_SET_ERR_MSG(extack, "Missing required MIGRATE attribute"); 2829cf5cb79fSThomas Graf return -EINVAL; 2830bd122403SSabrina Dubroca } 28315c79de6eSShinta Sugimoto 283213c1d189SArnaud Ebalard kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; 283313c1d189SArnaud Ebalard 2834fb7deabaSSabrina Dubroca err = copy_from_user_policy_type(&type, attrs, extack); 28355c79de6eSShinta Sugimoto if (err) 28365c79de6eSShinta Sugimoto return err; 28375c79de6eSShinta Sugimoto 2838bd122403SSabrina Dubroca err = copy_from_user_migrate(m, kmp, attrs, &n, extack); 28395c79de6eSShinta Sugimoto if (err) 28405c79de6eSShinta Sugimoto return err; 28415c79de6eSShinta Sugimoto 28425c79de6eSShinta Sugimoto if (!n) 28435c79de6eSShinta Sugimoto return 0; 28445c79de6eSShinta Sugimoto 28454ab47d47SAntony Antony if (attrs[XFRMA_ENCAP]) { 28464ab47d47SAntony Antony encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), 28474ab47d47SAntony Antony sizeof(*encap), GFP_KERNEL); 28484ab47d47SAntony Antony if (!encap) 28494ac7a6eeSZheng Yongjun return -ENOMEM; 28505c79de6eSShinta Sugimoto } 28514ab47d47SAntony Antony 2852c1aca308SYan Yan if (attrs[XFRMA_IF_ID]) 2853c1aca308SYan Yan if_id = nla_get_u32(attrs[XFRMA_IF_ID]); 2854c1aca308SYan Yan 2855bd122403SSabrina Dubroca err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap, 2856bd122403SSabrina Dubroca if_id, extack); 28574ab47d47SAntony Antony 28584ab47d47SAntony Antony kfree(encap); 28594ab47d47SAntony Antony 28604ab47d47SAntony Antony return err; 28614ab47d47SAntony Antony } 28625c79de6eSShinta Sugimoto #else 28635c79de6eSShinta Sugimoto static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, 28643bec6c3eSSabrina Dubroca struct nlattr **attrs, struct netlink_ext_ack *extack) 28655c79de6eSShinta Sugimoto { 28665c79de6eSShinta Sugimoto return -ENOPROTOOPT; 28675c79de6eSShinta Sugimoto } 28685c79de6eSShinta Sugimoto #endif 28695c79de6eSShinta Sugimoto 28705c79de6eSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 2871183cad12SDavid S. Miller static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) 28725c79de6eSShinta Sugimoto { 28735c79de6eSShinta Sugimoto struct xfrm_user_migrate um; 28745c79de6eSShinta Sugimoto 28755c79de6eSShinta Sugimoto memset(&um, 0, sizeof(um)); 28765c79de6eSShinta Sugimoto um.proto = m->proto; 28775c79de6eSShinta Sugimoto um.mode = m->mode; 28785c79de6eSShinta Sugimoto um.reqid = m->reqid; 28795c79de6eSShinta Sugimoto um.old_family = m->old_family; 28805c79de6eSShinta Sugimoto memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); 28815c79de6eSShinta Sugimoto memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); 28825c79de6eSShinta Sugimoto um.new_family = m->new_family; 28835c79de6eSShinta Sugimoto memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); 28845c79de6eSShinta Sugimoto memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); 28855c79de6eSShinta Sugimoto 2886c0144beaSThomas Graf return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); 28875c79de6eSShinta Sugimoto } 28885c79de6eSShinta Sugimoto 2889183cad12SDavid S. Miller static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) 289013c1d189SArnaud Ebalard { 289113c1d189SArnaud Ebalard struct xfrm_user_kmaddress uk; 289213c1d189SArnaud Ebalard 289313c1d189SArnaud Ebalard memset(&uk, 0, sizeof(uk)); 289413c1d189SArnaud Ebalard uk.family = k->family; 289513c1d189SArnaud Ebalard uk.reserved = k->reserved; 289613c1d189SArnaud Ebalard memcpy(&uk.local, &k->local, sizeof(uk.local)); 2897a1caa322SArnaud Ebalard memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); 289813c1d189SArnaud Ebalard 289913c1d189SArnaud Ebalard return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); 290013c1d189SArnaud Ebalard } 290113c1d189SArnaud Ebalard 2902a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma, 29038bafd730SAntony Antony int with_encp) 29047deb2264SThomas Graf { 29057deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) 290613c1d189SArnaud Ebalard + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) 29078bafd730SAntony Antony + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0) 29087deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) 29097deb2264SThomas Graf + userpolicy_type_attrsize(); 29107deb2264SThomas Graf } 29117deb2264SThomas Graf 2912183cad12SDavid S. Miller static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, 2913183cad12SDavid S. Miller int num_migrate, const struct xfrm_kmaddress *k, 29148bafd730SAntony Antony const struct xfrm_selector *sel, 29158bafd730SAntony Antony const struct xfrm_encap_tmpl *encap, u8 dir, u8 type) 29165c79de6eSShinta Sugimoto { 2917183cad12SDavid S. Miller const struct xfrm_migrate *mp; 29185c79de6eSShinta Sugimoto struct xfrm_userpolicy_id *pol_id; 29195c79de6eSShinta Sugimoto struct nlmsghdr *nlh; 29201d1e34ddSDavid S. Miller int i, err; 29215c79de6eSShinta Sugimoto 292279b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); 292379b8b7f4SThomas Graf if (nlh == NULL) 292479b8b7f4SThomas Graf return -EMSGSIZE; 29255c79de6eSShinta Sugimoto 29267b67c857SThomas Graf pol_id = nlmsg_data(nlh); 29275c79de6eSShinta Sugimoto /* copy data from selector, dir, and type to the pol_id */ 29285c79de6eSShinta Sugimoto memset(pol_id, 0, sizeof(*pol_id)); 29295c79de6eSShinta Sugimoto memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); 29305c79de6eSShinta Sugimoto pol_id->dir = dir; 29315c79de6eSShinta Sugimoto 29321d1e34ddSDavid S. Miller if (k != NULL) { 29331d1e34ddSDavid S. Miller err = copy_to_user_kmaddress(k, skb); 29341d1e34ddSDavid S. Miller if (err) 29351d1e34ddSDavid S. Miller goto out_cancel; 29361d1e34ddSDavid S. Miller } 29378bafd730SAntony Antony if (encap) { 29388bafd730SAntony Antony err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap); 29398bafd730SAntony Antony if (err) 29408bafd730SAntony Antony goto out_cancel; 29418bafd730SAntony Antony } 29421d1e34ddSDavid S. Miller err = copy_to_user_policy_type(type, skb); 29431d1e34ddSDavid S. Miller if (err) 29441d1e34ddSDavid S. Miller goto out_cancel; 29455c79de6eSShinta Sugimoto for (i = 0, mp = m ; i < num_migrate; i++, mp++) { 29461d1e34ddSDavid S. Miller err = copy_to_user_migrate(mp, skb); 29471d1e34ddSDavid S. Miller if (err) 29481d1e34ddSDavid S. Miller goto out_cancel; 29495c79de6eSShinta Sugimoto } 29505c79de6eSShinta Sugimoto 2951053c095aSJohannes Berg nlmsg_end(skb, nlh); 2952053c095aSJohannes Berg return 0; 29531d1e34ddSDavid S. Miller 29541d1e34ddSDavid S. Miller out_cancel: 29559825069dSThomas Graf nlmsg_cancel(skb, nlh); 29561d1e34ddSDavid S. Miller return err; 29575c79de6eSShinta Sugimoto } 29585c79de6eSShinta Sugimoto 2959183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2960183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 29618bafd730SAntony Antony const struct xfrm_kmaddress *k, 29628bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 29635c79de6eSShinta Sugimoto { 2964a6483b79SAlexey Dobriyan struct net *net = &init_net; 29655c79de6eSShinta Sugimoto struct sk_buff *skb; 29662fc5f83bSGustavo A. R. Silva int err; 29675c79de6eSShinta Sugimoto 29688bafd730SAntony Antony skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap), 29698bafd730SAntony Antony GFP_ATOMIC); 29705c79de6eSShinta Sugimoto if (skb == NULL) 29715c79de6eSShinta Sugimoto return -ENOMEM; 29725c79de6eSShinta Sugimoto 29735c79de6eSShinta Sugimoto /* build migrate */ 29742fc5f83bSGustavo A. R. Silva err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type); 29752fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 29765c79de6eSShinta Sugimoto 297721ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); 29785c79de6eSShinta Sugimoto } 29795c79de6eSShinta Sugimoto #else 2980183cad12SDavid S. Miller static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 2981183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 29828bafd730SAntony Antony const struct xfrm_kmaddress *k, 29838bafd730SAntony Antony const struct xfrm_encap_tmpl *encap) 29845c79de6eSShinta Sugimoto { 29855c79de6eSShinta Sugimoto return -ENOPROTOOPT; 29865c79de6eSShinta Sugimoto } 29875c79de6eSShinta Sugimoto #endif 2988d51d081dSJamal Hadi Salim 2989a7bd9a45SThomas Graf #define XMSGSIZE(type) sizeof(struct type) 2990492b558bSThomas Graf 29915461fc0cSDmitry Safonov const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { 299266f9a259SDavid S. Miller [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 2993492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2994492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), 2995492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 2996492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2997492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 2998492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), 2999980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), 300053bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), 3001492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), 300266f9a259SDavid S. Miller [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), 30036c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), 3004492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), 3005a7bd9a45SThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, 3006d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 3007d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), 300897a64b45SMasahide NAKAMURA [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), 30095c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), 3010a7bd9a45SThomas Graf [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), 3011880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 3012a7bd9a45SThomas Graf [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), 30132d151d39SSteffen Klassert [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default), 30142d151d39SSteffen Klassert [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default), 30151da177e4SLinus Torvalds }; 30165461fc0cSDmitry Safonov EXPORT_SYMBOL_GPL(xfrm_msg_min); 30171da177e4SLinus Torvalds 3018492b558bSThomas Graf #undef XMSGSIZE 3019492b558bSThomas Graf 30205106f4a8SDmitry Safonov const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { 3021c28e9304Sjamal [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, 3022c28e9304Sjamal [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, 3023c28e9304Sjamal [XFRMA_LASTUSED] = { .type = NLA_U64}, 3024c28e9304Sjamal [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, 30251a6509d9SHerbert Xu [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, 3026cf5cb79fSThomas Graf [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, 3027cf5cb79fSThomas Graf [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, 3028cf5cb79fSThomas Graf [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, 3029cf5cb79fSThomas Graf [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, 3030cf5cb79fSThomas Graf [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, 3031d1e0e61dSLin Ma [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) }, 3032cf5cb79fSThomas Graf [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, 3033cf5cb79fSThomas Graf [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, 3034cf5cb79fSThomas Graf [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, 3035cf5cb79fSThomas Graf [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, 3036cf5cb79fSThomas Graf [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, 3037cf5cb79fSThomas Graf [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, 3038cf5cb79fSThomas Graf [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, 3039cf5cb79fSThomas Graf [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, 304013c1d189SArnaud Ebalard [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, 30416f26b61eSJamal Hadi Salim [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, 304235d2856bSMartin Willi [XFRMA_TFCPAD] = { .type = NLA_U32 }, 3043d8647b79SSteffen Klassert [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, 3044a947b0a9SNicolas Dichtel [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, 3045d3623099SNicolas Dichtel [XFRMA_PROTO] = { .type = NLA_U8 }, 3046870a2df4SNicolas Dichtel [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, 3047d77e38e6SSteffen Klassert [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) }, 30489b42c1f1SSteffen Klassert [XFRMA_SET_MARK] = { .type = NLA_U32 }, 30499b42c1f1SSteffen Klassert [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 }, 30507e652640SSteffen Klassert [XFRMA_IF_ID] = { .type = NLA_U32 }, 30515e242470SLin Ma [XFRMA_MTIMER_THRESH] = { .type = NLA_U32 }, 3052cf5cb79fSThomas Graf }; 30535106f4a8SDmitry Safonov EXPORT_SYMBOL_GPL(xfrma_policy); 3054cf5cb79fSThomas Graf 3055880a6fabSChristophe Gouault static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { 3056880a6fabSChristophe Gouault [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 3057880a6fabSChristophe Gouault [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, 3058880a6fabSChristophe Gouault }; 3059880a6fabSChristophe Gouault 306005600a79SMathias Krause static const struct xfrm_link { 30613bec6c3eSSabrina Dubroca int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **, 30623bec6c3eSSabrina Dubroca struct netlink_ext_ack *); 30631137b5e2SHerbert Xu int (*start)(struct netlink_callback *); 30641da177e4SLinus Torvalds int (*dump)(struct sk_buff *, struct netlink_callback *); 30654c563f76STimo Teras int (*done)(struct netlink_callback *); 3066880a6fabSChristophe Gouault const struct nla_policy *nla_pol; 3067880a6fabSChristophe Gouault int nla_max; 3068492b558bSThomas Graf } xfrm_dispatch[XFRM_NR_MSGTYPES] = { 3069492b558bSThomas Graf [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 3070492b558bSThomas Graf [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, 3071492b558bSThomas Graf [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, 30724c563f76STimo Teras .dump = xfrm_dump_sa, 30734c563f76STimo Teras .done = xfrm_dump_sa_done }, 3074492b558bSThomas Graf [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 3075492b558bSThomas Graf [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, 3076492b558bSThomas Graf [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, 30771137b5e2SHerbert Xu .start = xfrm_dump_policy_start, 30784c563f76STimo Teras .dump = xfrm_dump_policy, 30794c563f76STimo Teras .done = xfrm_dump_policy_done }, 3080492b558bSThomas Graf [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, 3081980ebd25SJamal Hadi Salim [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, 308253bc6b4dSJamal Hadi Salim [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, 3083492b558bSThomas Graf [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, 3084492b558bSThomas Graf [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, 30856c5c8ca7SJamal Hadi Salim [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, 3086492b558bSThomas Graf [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, 3087492b558bSThomas Graf [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, 3088d51d081dSJamal Hadi Salim [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, 3089d51d081dSJamal Hadi Salim [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, 30905c79de6eSShinta Sugimoto [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, 309128d8909bSJamal Hadi Salim [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, 3092880a6fabSChristophe Gouault [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, 3093880a6fabSChristophe Gouault .nla_pol = xfrma_spd_policy, 3094880a6fabSChristophe Gouault .nla_max = XFRMA_SPD_MAX }, 3095ecfd6b18SJamal Hadi Salim [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, 30962d151d39SSteffen Klassert [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default }, 30972d151d39SSteffen Klassert [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default }, 30981da177e4SLinus Torvalds }; 30991da177e4SLinus Torvalds 31002d4bc933SJohannes Berg static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 31012d4bc933SJohannes Berg struct netlink_ext_ack *extack) 31021da177e4SLinus Torvalds { 3103a6483b79SAlexey Dobriyan struct net *net = sock_net(skb->sk); 310435a7aa08SThomas Graf struct nlattr *attrs[XFRMA_MAX+1]; 310505600a79SMathias Krause const struct xfrm_link *link; 31065106f4a8SDmitry Safonov struct nlmsghdr *nlh64 = NULL; 3107a7bd9a45SThomas Graf int type, err; 31081da177e4SLinus Torvalds 31091da177e4SLinus Torvalds type = nlh->nlmsg_type; 31101da177e4SLinus Torvalds if (type > XFRM_MSG_MAX) 31111d00a4ebSThomas Graf return -EINVAL; 31121da177e4SLinus Torvalds 31131da177e4SLinus Torvalds type -= XFRM_MSG_BASE; 31141da177e4SLinus Torvalds link = &xfrm_dispatch[type]; 31151da177e4SLinus Torvalds 31161da177e4SLinus Torvalds /* All operations require privileges, even GET */ 311790f62cf3SEric W. Biederman if (!netlink_net_capable(skb, CAP_NET_ADMIN)) 31181d00a4ebSThomas Graf return -EPERM; 31191da177e4SLinus Torvalds 31205106f4a8SDmitry Safonov if (in_compat_syscall()) { 31215106f4a8SDmitry Safonov struct xfrm_translator *xtr = xfrm_get_translator(); 31225106f4a8SDmitry Safonov 31235106f4a8SDmitry Safonov if (!xtr) 31245106f4a8SDmitry Safonov return -EOPNOTSUPP; 31255106f4a8SDmitry Safonov 31265106f4a8SDmitry Safonov nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max, 31275106f4a8SDmitry Safonov link->nla_pol, extack); 31285106f4a8SDmitry Safonov xfrm_put_translator(xtr); 31295106f4a8SDmitry Safonov if (IS_ERR(nlh64)) 31305106f4a8SDmitry Safonov return PTR_ERR(nlh64); 31315106f4a8SDmitry Safonov if (nlh64) 31325106f4a8SDmitry Safonov nlh = nlh64; 31335106f4a8SDmitry Safonov } 31345106f4a8SDmitry Safonov 3135492b558bSThomas Graf if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || 3136492b558bSThomas Graf type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && 3137b8f3ab42SDavid S. Miller (nlh->nlmsg_flags & NLM_F_DUMP)) { 313880d326faSPablo Neira Ayuso struct netlink_dump_control c = { 31391137b5e2SHerbert Xu .start = link->start, 314080d326faSPablo Neira Ayuso .dump = link->dump, 314180d326faSPablo Neira Ayuso .done = link->done, 314280d326faSPablo Neira Ayuso }; 31435106f4a8SDmitry Safonov 31445106f4a8SDmitry Safonov if (link->dump == NULL) { 31455106f4a8SDmitry Safonov err = -EINVAL; 31465106f4a8SDmitry Safonov goto err; 314780d326faSPablo Neira Ayuso } 31485106f4a8SDmitry Safonov 31495106f4a8SDmitry Safonov err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); 31505106f4a8SDmitry Safonov goto err; 31511da177e4SLinus Torvalds } 31521da177e4SLinus Torvalds 31538cb08174SJohannes Berg err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs, 3154880a6fabSChristophe Gouault link->nla_max ? : XFRMA_MAX, 3155fe52145fSJohannes Berg link->nla_pol ? : xfrma_policy, extack); 3156a7bd9a45SThomas Graf if (err < 0) 31575106f4a8SDmitry Safonov goto err; 31585106f4a8SDmitry Safonov 31595106f4a8SDmitry Safonov if (link->doit == NULL) { 31605106f4a8SDmitry Safonov err = -EINVAL; 31615106f4a8SDmitry Safonov goto err; 31625106f4a8SDmitry Safonov } 31635106f4a8SDmitry Safonov 31643bec6c3eSSabrina Dubroca err = link->doit(skb, nlh, attrs, extack); 31655106f4a8SDmitry Safonov 31667c1a80e8SPavel Skripkin /* We need to free skb allocated in xfrm_alloc_compat() before 31677c1a80e8SPavel Skripkin * returning from this function, because consume_skb() won't take 31687c1a80e8SPavel Skripkin * care of frag_list since netlink destructor sets 31697c1a80e8SPavel Skripkin * sbk->head to NULL. (see netlink_skb_destructor()) 31707c1a80e8SPavel Skripkin */ 31717c1a80e8SPavel Skripkin if (skb_has_frag_list(skb)) { 31727c1a80e8SPavel Skripkin kfree_skb(skb_shinfo(skb)->frag_list); 31737c1a80e8SPavel Skripkin skb_shinfo(skb)->frag_list = NULL; 31747c1a80e8SPavel Skripkin } 31757c1a80e8SPavel Skripkin 31765106f4a8SDmitry Safonov err: 31775106f4a8SDmitry Safonov kvfree(nlh64); 3178a7bd9a45SThomas Graf return err; 31791da177e4SLinus Torvalds } 31801da177e4SLinus Torvalds 3181cd40b7d3SDenis V. Lunev static void xfrm_netlink_rcv(struct sk_buff *skb) 31821da177e4SLinus Torvalds { 3183283bc9f3SFan Du struct net *net = sock_net(skb->sk); 3184283bc9f3SFan Du 3185283bc9f3SFan Du mutex_lock(&net->xfrm.xfrm_cfg_mutex); 3186cd40b7d3SDenis V. Lunev netlink_rcv_skb(skb, &xfrm_user_rcv_msg); 3187283bc9f3SFan Du mutex_unlock(&net->xfrm.xfrm_cfg_mutex); 31881da177e4SLinus Torvalds } 31891da177e4SLinus Torvalds 3190a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_expire_msgsize(void) 31917deb2264SThomas Graf { 31926f26b61eSJamal Hadi Salim return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) 31936f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)); 31947deb2264SThomas Graf } 31957deb2264SThomas Graf 3196214e005bSDavid S. Miller static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) 31971da177e4SLinus Torvalds { 31981da177e4SLinus Torvalds struct xfrm_user_expire *ue; 31991da177e4SLinus Torvalds struct nlmsghdr *nlh; 32001d1e34ddSDavid S. Miller int err; 32011da177e4SLinus Torvalds 320215e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); 320379b8b7f4SThomas Graf if (nlh == NULL) 320479b8b7f4SThomas Graf return -EMSGSIZE; 32051da177e4SLinus Torvalds 32067b67c857SThomas Graf ue = nlmsg_data(nlh); 32071da177e4SLinus Torvalds copy_to_user_state(x, &ue->state); 3208d51d081dSJamal Hadi Salim ue->hard = (c->data.hard != 0) ? 1 : 0; 3209e3e5fc16SMathias Krause /* clear the padding bytes */ 3210caf283d0SKees Cook memset_after(ue, 0, hard); 32111da177e4SLinus Torvalds 32121d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &x->mark); 32131d1e34ddSDavid S. Miller if (err) 32141d1e34ddSDavid S. Miller return err; 32156f26b61eSJamal Hadi Salim 32167e652640SSteffen Klassert err = xfrm_if_id_put(skb, x->if_id); 32177e652640SSteffen Klassert if (err) 32187e652640SSteffen Klassert return err; 32197e652640SSteffen Klassert 3220053c095aSJohannes Berg nlmsg_end(skb, nlh); 3221053c095aSJohannes Berg return 0; 32221da177e4SLinus Torvalds } 32231da177e4SLinus Torvalds 3224214e005bSDavid S. Miller static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) 32251da177e4SLinus Torvalds { 3226fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 32271da177e4SLinus Torvalds struct sk_buff *skb; 32281da177e4SLinus Torvalds 32297deb2264SThomas Graf skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); 32301da177e4SLinus Torvalds if (skb == NULL) 32311da177e4SLinus Torvalds return -ENOMEM; 32321da177e4SLinus Torvalds 32336f26b61eSJamal Hadi Salim if (build_expire(skb, x, c) < 0) { 32346f26b61eSJamal Hadi Salim kfree_skb(skb); 32356f26b61eSJamal Hadi Salim return -EMSGSIZE; 32366f26b61eSJamal Hadi Salim } 32371da177e4SLinus Torvalds 323821ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 32391da177e4SLinus Torvalds } 32401da177e4SLinus Torvalds 3241214e005bSDavid S. Miller static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) 3242d51d081dSJamal Hadi Salim { 3243fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 3244d51d081dSJamal Hadi Salim struct sk_buff *skb; 32452fc5f83bSGustavo A. R. Silva int err; 3246d51d081dSJamal Hadi Salim 3247d8647b79SSteffen Klassert skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); 3248d51d081dSJamal Hadi Salim if (skb == NULL) 3249d51d081dSJamal Hadi Salim return -ENOMEM; 3250d51d081dSJamal Hadi Salim 32512fc5f83bSGustavo A. R. Silva err = build_aevent(skb, x, c); 32522fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 3253d51d081dSJamal Hadi Salim 325421ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); 3255d51d081dSJamal Hadi Salim } 3256d51d081dSJamal Hadi Salim 3257214e005bSDavid S. Miller static int xfrm_notify_sa_flush(const struct km_event *c) 325826b15dadSJamal Hadi Salim { 32597067802eSAlexey Dobriyan struct net *net = c->net; 326026b15dadSJamal Hadi Salim struct xfrm_usersa_flush *p; 326126b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 326226b15dadSJamal Hadi Salim struct sk_buff *skb; 32637deb2264SThomas Graf int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); 326426b15dadSJamal Hadi Salim 32657deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 326626b15dadSJamal Hadi Salim if (skb == NULL) 326726b15dadSJamal Hadi Salim return -ENOMEM; 326826b15dadSJamal Hadi Salim 326915e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); 327079b8b7f4SThomas Graf if (nlh == NULL) { 327179b8b7f4SThomas Graf kfree_skb(skb); 327279b8b7f4SThomas Graf return -EMSGSIZE; 327379b8b7f4SThomas Graf } 327426b15dadSJamal Hadi Salim 32757b67c857SThomas Graf p = nlmsg_data(nlh); 3276bf08867fSHerbert Xu p->proto = c->data.proto; 327726b15dadSJamal Hadi Salim 32789825069dSThomas Graf nlmsg_end(skb, nlh); 327926b15dadSJamal Hadi Salim 328021ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 328126b15dadSJamal Hadi Salim } 328226b15dadSJamal Hadi Salim 3283a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_sa_len(struct xfrm_state *x) 328426b15dadSJamal Hadi Salim { 3285a1b831f2SAlexey Dobriyan unsigned int l = 0; 32861a6509d9SHerbert Xu if (x->aead) 32871a6509d9SHerbert Xu l += nla_total_size(aead_len(x->aead)); 32884447bb33SMartin Willi if (x->aalg) { 32894447bb33SMartin Willi l += nla_total_size(sizeof(struct xfrm_algo) + 32904447bb33SMartin Willi (x->aalg->alg_key_len + 7) / 8); 32914447bb33SMartin Willi l += nla_total_size(xfrm_alg_auth_len(x->aalg)); 32924447bb33SMartin Willi } 329326b15dadSJamal Hadi Salim if (x->ealg) 32940f99be0dSEric Dumazet l += nla_total_size(xfrm_alg_len(x->ealg)); 329526b15dadSJamal Hadi Salim if (x->calg) 32967deb2264SThomas Graf l += nla_total_size(sizeof(*x->calg)); 329726b15dadSJamal Hadi Salim if (x->encap) 32987deb2264SThomas Graf l += nla_total_size(sizeof(*x->encap)); 329935d2856bSMartin Willi if (x->tfcpad) 330035d2856bSMartin Willi l += nla_total_size(sizeof(x->tfcpad)); 3301d8647b79SSteffen Klassert if (x->replay_esn) 3302d8647b79SSteffen Klassert l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); 3303f293a5e3Sdingzhi else 3304f293a5e3Sdingzhi l += nla_total_size(sizeof(struct xfrm_replay_state)); 330568325d3bSHerbert Xu if (x->security) 330668325d3bSHerbert Xu l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + 330768325d3bSHerbert Xu x->security->ctx_len); 330868325d3bSHerbert Xu if (x->coaddr) 330968325d3bSHerbert Xu l += nla_total_size(sizeof(*x->coaddr)); 3310a947b0a9SNicolas Dichtel if (x->props.extra_flags) 3311a947b0a9SNicolas Dichtel l += nla_total_size(sizeof(x->props.extra_flags)); 3312d77e38e6SSteffen Klassert if (x->xso.dev) 33137770a39dSEric Dumazet l += nla_total_size(sizeof(struct xfrm_user_offload)); 33149b42c1f1SSteffen Klassert if (x->props.smark.v | x->props.smark.m) { 33159b42c1f1SSteffen Klassert l += nla_total_size(sizeof(x->props.smark.v)); 33169b42c1f1SSteffen Klassert l += nla_total_size(sizeof(x->props.smark.m)); 33179b42c1f1SSteffen Klassert } 33187e652640SSteffen Klassert if (x->if_id) 33197e652640SSteffen Klassert l += nla_total_size(sizeof(x->if_id)); 332068325d3bSHerbert Xu 3321d26f3984SHerbert Xu /* Must count x->lastused as it may become non-zero behind our back. */ 3322de95c4a4SNicolas Dichtel l += nla_total_size_64bit(sizeof(u64)); 332326b15dadSJamal Hadi Salim 33244e484b3eSAntony Antony if (x->mapping_maxage) 33254e484b3eSAntony Antony l += nla_total_size(sizeof(x->mapping_maxage)); 33264e484b3eSAntony Antony 332726b15dadSJamal Hadi Salim return l; 332826b15dadSJamal Hadi Salim } 332926b15dadSJamal Hadi Salim 3330214e005bSDavid S. Miller static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) 333126b15dadSJamal Hadi Salim { 3332fc34acd3SAlexey Dobriyan struct net *net = xs_net(x); 333326b15dadSJamal Hadi Salim struct xfrm_usersa_info *p; 33340603eac0SHerbert Xu struct xfrm_usersa_id *id; 333526b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 333626b15dadSJamal Hadi Salim struct sk_buff *skb; 3337a1b831f2SAlexey Dobriyan unsigned int len = xfrm_sa_len(x); 3338a1b831f2SAlexey Dobriyan unsigned int headlen; 3339a1b831f2SAlexey Dobriyan int err; 33400603eac0SHerbert Xu 33410603eac0SHerbert Xu headlen = sizeof(*p); 33420603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 33437deb2264SThomas Graf len += nla_total_size(headlen); 33440603eac0SHerbert Xu headlen = sizeof(*id); 33456f26b61eSJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 33460603eac0SHerbert Xu } 33477deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 334826b15dadSJamal Hadi Salim 33497deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 335026b15dadSJamal Hadi Salim if (skb == NULL) 335126b15dadSJamal Hadi Salim return -ENOMEM; 335226b15dadSJamal Hadi Salim 335315e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 33541d1e34ddSDavid S. Miller err = -EMSGSIZE; 335579b8b7f4SThomas Graf if (nlh == NULL) 33561d1e34ddSDavid S. Miller goto out_free_skb; 335726b15dadSJamal Hadi Salim 33587b67c857SThomas Graf p = nlmsg_data(nlh); 33590603eac0SHerbert Xu if (c->event == XFRM_MSG_DELSA) { 3360c0144beaSThomas Graf struct nlattr *attr; 3361c0144beaSThomas Graf 33627b67c857SThomas Graf id = nlmsg_data(nlh); 336350329c8aSMathias Krause memset(id, 0, sizeof(*id)); 33640603eac0SHerbert Xu memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); 33650603eac0SHerbert Xu id->spi = x->id.spi; 33660603eac0SHerbert Xu id->family = x->props.family; 33670603eac0SHerbert Xu id->proto = x->id.proto; 33680603eac0SHerbert Xu 3369c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); 33701d1e34ddSDavid S. Miller err = -EMSGSIZE; 3371c0144beaSThomas Graf if (attr == NULL) 33721d1e34ddSDavid S. Miller goto out_free_skb; 3373c0144beaSThomas Graf 3374c0144beaSThomas Graf p = nla_data(attr); 33750603eac0SHerbert Xu } 33761d1e34ddSDavid S. Miller err = copy_to_user_state_extra(x, p, skb); 33771d1e34ddSDavid S. Miller if (err) 33781d1e34ddSDavid S. Miller goto out_free_skb; 337926b15dadSJamal Hadi Salim 33809825069dSThomas Graf nlmsg_end(skb, nlh); 338126b15dadSJamal Hadi Salim 338221ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); 338326b15dadSJamal Hadi Salim 33841d1e34ddSDavid S. Miller out_free_skb: 338526b15dadSJamal Hadi Salim kfree_skb(skb); 33861d1e34ddSDavid S. Miller return err; 338726b15dadSJamal Hadi Salim } 338826b15dadSJamal Hadi Salim 3389214e005bSDavid S. Miller static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) 339026b15dadSJamal Hadi Salim { 339126b15dadSJamal Hadi Salim 339226b15dadSJamal Hadi Salim switch (c->event) { 3393f60f6b8fSHerbert Xu case XFRM_MSG_EXPIRE: 339426b15dadSJamal Hadi Salim return xfrm_exp_state_notify(x, c); 3395d51d081dSJamal Hadi Salim case XFRM_MSG_NEWAE: 3396d51d081dSJamal Hadi Salim return xfrm_aevent_state_notify(x, c); 3397f60f6b8fSHerbert Xu case XFRM_MSG_DELSA: 3398f60f6b8fSHerbert Xu case XFRM_MSG_UPDSA: 3399f60f6b8fSHerbert Xu case XFRM_MSG_NEWSA: 340026b15dadSJamal Hadi Salim return xfrm_notify_sa(x, c); 3401f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHSA: 340226b15dadSJamal Hadi Salim return xfrm_notify_sa_flush(c); 340326b15dadSJamal Hadi Salim default: 340462db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", 340562db5cfdSstephen hemminger c->event); 340626b15dadSJamal Hadi Salim break; 340726b15dadSJamal Hadi Salim } 340826b15dadSJamal Hadi Salim 340926b15dadSJamal Hadi Salim return 0; 341026b15dadSJamal Hadi Salim 341126b15dadSJamal Hadi Salim } 341226b15dadSJamal Hadi Salim 3413a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x, 34147deb2264SThomas Graf struct xfrm_policy *xp) 34157deb2264SThomas Graf { 34167deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) 34177deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 34186f26b61eSJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 34197deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(x->security)) 34207deb2264SThomas Graf + userpolicy_type_attrsize(); 34217deb2264SThomas Graf } 34227deb2264SThomas Graf 34231da177e4SLinus Torvalds static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, 342465e0736bSFan Du struct xfrm_tmpl *xt, struct xfrm_policy *xp) 34251da177e4SLinus Torvalds { 34261d1e34ddSDavid S. Miller __u32 seq = xfrm_get_acqseq(); 34271da177e4SLinus Torvalds struct xfrm_user_acquire *ua; 34281da177e4SLinus Torvalds struct nlmsghdr *nlh; 34291d1e34ddSDavid S. Miller int err; 34301da177e4SLinus Torvalds 343179b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); 343279b8b7f4SThomas Graf if (nlh == NULL) 343379b8b7f4SThomas Graf return -EMSGSIZE; 34341da177e4SLinus Torvalds 34357b67c857SThomas Graf ua = nlmsg_data(nlh); 34361da177e4SLinus Torvalds memcpy(&ua->id, &x->id, sizeof(ua->id)); 34371da177e4SLinus Torvalds memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); 34381da177e4SLinus Torvalds memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); 343965e0736bSFan Du copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); 34401da177e4SLinus Torvalds ua->aalgos = xt->aalgos; 34411da177e4SLinus Torvalds ua->ealgos = xt->ealgos; 34421da177e4SLinus Torvalds ua->calgos = xt->calgos; 34431da177e4SLinus Torvalds ua->seq = x->km.seq = seq; 34441da177e4SLinus Torvalds 34451d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 34461d1e34ddSDavid S. Miller if (!err) 34471d1e34ddSDavid S. Miller err = copy_to_user_state_sec_ctx(x, skb); 34481d1e34ddSDavid S. Miller if (!err) 34491d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 34501d1e34ddSDavid S. Miller if (!err) 34511d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 34527e652640SSteffen Klassert if (!err) 34537e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 3454919e43faSLeon Romanovsky if (!err && xp->xdo.dev) 3455919e43faSLeon Romanovsky err = copy_user_offload(&xp->xdo, skb); 34561d1e34ddSDavid S. Miller if (err) { 34571d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 34581d1e34ddSDavid S. Miller return err; 34591d1e34ddSDavid S. Miller } 34601da177e4SLinus Torvalds 3461053c095aSJohannes Berg nlmsg_end(skb, nlh); 3462053c095aSJohannes Berg return 0; 34631da177e4SLinus Torvalds } 34641da177e4SLinus Torvalds 34651da177e4SLinus Torvalds static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 346665e0736bSFan Du struct xfrm_policy *xp) 34671da177e4SLinus Torvalds { 3468a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 34691da177e4SLinus Torvalds struct sk_buff *skb; 34702fc5f83bSGustavo A. R. Silva int err; 34711da177e4SLinus Torvalds 34727deb2264SThomas Graf skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); 34731da177e4SLinus Torvalds if (skb == NULL) 34741da177e4SLinus Torvalds return -ENOMEM; 34751da177e4SLinus Torvalds 34762fc5f83bSGustavo A. R. Silva err = build_acquire(skb, x, xt, xp); 34772fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 34781da177e4SLinus Torvalds 347921ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); 34801da177e4SLinus Torvalds } 34811da177e4SLinus Torvalds 34821da177e4SLinus Torvalds /* User gives us xfrm_user_policy_info followed by an array of 0 34831da177e4SLinus Torvalds * or more templates. 34841da177e4SLinus Torvalds */ 3485cb969f07SVenkat Yekkirala static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, 34861da177e4SLinus Torvalds u8 *data, int len, int *dir) 34871da177e4SLinus Torvalds { 3488fc34acd3SAlexey Dobriyan struct net *net = sock_net(sk); 34891da177e4SLinus Torvalds struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; 34901da177e4SLinus Torvalds struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); 34911da177e4SLinus Torvalds struct xfrm_policy *xp; 34921da177e4SLinus Torvalds int nr; 34931da177e4SLinus Torvalds 3494cb969f07SVenkat Yekkirala switch (sk->sk_family) { 34951da177e4SLinus Torvalds case AF_INET: 34961da177e4SLinus Torvalds if (opt != IP_XFRM_POLICY) { 34971da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 34981da177e4SLinus Torvalds return NULL; 34991da177e4SLinus Torvalds } 35001da177e4SLinus Torvalds break; 3501dfd56b8bSEric Dumazet #if IS_ENABLED(CONFIG_IPV6) 35021da177e4SLinus Torvalds case AF_INET6: 35031da177e4SLinus Torvalds if (opt != IPV6_XFRM_POLICY) { 35041da177e4SLinus Torvalds *dir = -EOPNOTSUPP; 35051da177e4SLinus Torvalds return NULL; 35061da177e4SLinus Torvalds } 35071da177e4SLinus Torvalds break; 35081da177e4SLinus Torvalds #endif 35091da177e4SLinus Torvalds default: 35101da177e4SLinus Torvalds *dir = -EINVAL; 35111da177e4SLinus Torvalds return NULL; 35121da177e4SLinus Torvalds } 35131da177e4SLinus Torvalds 35141da177e4SLinus Torvalds *dir = -EINVAL; 35151da177e4SLinus Torvalds 35161da177e4SLinus Torvalds if (len < sizeof(*p) || 3517ec2b4f01SSabrina Dubroca verify_newpolicy_info(p, NULL)) 35181da177e4SLinus Torvalds return NULL; 35191da177e4SLinus Torvalds 35201da177e4SLinus Torvalds nr = ((len - sizeof(*p)) / sizeof(*ut)); 35213d776e31STobias Brunner if (validate_tmpl(nr, ut, p->sel.family, p->dir, NULL)) 35221da177e4SLinus Torvalds return NULL; 35231da177e4SLinus Torvalds 3524a4f1bac6SHerbert Xu if (p->dir > XFRM_POLICY_OUT) 3525a4f1bac6SHerbert Xu return NULL; 3526a4f1bac6SHerbert Xu 35272f09a4d5SHerbert Xu xp = xfrm_policy_alloc(net, GFP_ATOMIC); 35281da177e4SLinus Torvalds if (xp == NULL) { 35291da177e4SLinus Torvalds *dir = -ENOBUFS; 35301da177e4SLinus Torvalds return NULL; 35311da177e4SLinus Torvalds } 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds copy_from_user_policy(xp, p); 3534f7b6983fSMasahide NAKAMURA xp->type = XFRM_POLICY_TYPE_MAIN; 35351da177e4SLinus Torvalds copy_templates(xp, ut, nr); 35361da177e4SLinus Torvalds 35371da177e4SLinus Torvalds *dir = p->dir; 35381da177e4SLinus Torvalds 35391da177e4SLinus Torvalds return xp; 35401da177e4SLinus Torvalds } 35411da177e4SLinus Torvalds 3542a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp) 35437deb2264SThomas Graf { 35447deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) 35457deb2264SThomas Graf + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) 35467deb2264SThomas Graf + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) 3547295fae56SJamal Hadi Salim + nla_total_size(sizeof(struct xfrm_mark)) 35487deb2264SThomas Graf + userpolicy_type_attrsize(); 35497deb2264SThomas Graf } 35507deb2264SThomas Graf 35511da177e4SLinus Torvalds static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, 3552214e005bSDavid S. Miller int dir, const struct km_event *c) 35531da177e4SLinus Torvalds { 35541da177e4SLinus Torvalds struct xfrm_user_polexpire *upe; 3555d51d081dSJamal Hadi Salim int hard = c->data.hard; 35561d1e34ddSDavid S. Miller struct nlmsghdr *nlh; 35571d1e34ddSDavid S. Miller int err; 35581da177e4SLinus Torvalds 355915e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); 356079b8b7f4SThomas Graf if (nlh == NULL) 356179b8b7f4SThomas Graf return -EMSGSIZE; 35621da177e4SLinus Torvalds 35637b67c857SThomas Graf upe = nlmsg_data(nlh); 35641da177e4SLinus Torvalds copy_to_user_policy(xp, &upe->pol, dir); 35651d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 35661d1e34ddSDavid S. Miller if (!err) 35671d1e34ddSDavid S. Miller err = copy_to_user_sec_ctx(xp, skb); 35681d1e34ddSDavid S. Miller if (!err) 35691d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 35701d1e34ddSDavid S. Miller if (!err) 35711d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 35727e652640SSteffen Klassert if (!err) 35737e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 3574919e43faSLeon Romanovsky if (!err && xp->xdo.dev) 3575919e43faSLeon Romanovsky err = copy_user_offload(&xp->xdo, skb); 35761d1e34ddSDavid S. Miller if (err) { 35771d1e34ddSDavid S. Miller nlmsg_cancel(skb, nlh); 35781d1e34ddSDavid S. Miller return err; 35791d1e34ddSDavid S. Miller } 35801da177e4SLinus Torvalds upe->hard = !!hard; 35811da177e4SLinus Torvalds 3582053c095aSJohannes Berg nlmsg_end(skb, nlh); 3583053c095aSJohannes Berg return 0; 35841da177e4SLinus Torvalds } 35851da177e4SLinus Torvalds 3586214e005bSDavid S. Miller static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 35871da177e4SLinus Torvalds { 3588fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 35891da177e4SLinus Torvalds struct sk_buff *skb; 35902fc5f83bSGustavo A. R. Silva int err; 35911da177e4SLinus Torvalds 35927deb2264SThomas Graf skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); 35931da177e4SLinus Torvalds if (skb == NULL) 35941da177e4SLinus Torvalds return -ENOMEM; 35951da177e4SLinus Torvalds 35962fc5f83bSGustavo A. R. Silva err = build_polexpire(skb, xp, dir, c); 35972fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 35981da177e4SLinus Torvalds 359921ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); 36001da177e4SLinus Torvalds } 36011da177e4SLinus Torvalds 3602214e005bSDavid S. Miller static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) 360326b15dadSJamal Hadi Salim { 3604a1b831f2SAlexey Dobriyan unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); 3605fc34acd3SAlexey Dobriyan struct net *net = xp_net(xp); 360626b15dadSJamal Hadi Salim struct xfrm_userpolicy_info *p; 36070603eac0SHerbert Xu struct xfrm_userpolicy_id *id; 360826b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 360926b15dadSJamal Hadi Salim struct sk_buff *skb; 3610a1b831f2SAlexey Dobriyan unsigned int headlen; 3611a1b831f2SAlexey Dobriyan int err; 36120603eac0SHerbert Xu 36130603eac0SHerbert Xu headlen = sizeof(*p); 36140603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 36157deb2264SThomas Graf len += nla_total_size(headlen); 36160603eac0SHerbert Xu headlen = sizeof(*id); 36170603eac0SHerbert Xu } 3618cfbfd45aSThomas Graf len += userpolicy_type_attrsize(); 3619295fae56SJamal Hadi Salim len += nla_total_size(sizeof(struct xfrm_mark)); 36207deb2264SThomas Graf len += NLMSG_ALIGN(headlen); 362126b15dadSJamal Hadi Salim 36227deb2264SThomas Graf skb = nlmsg_new(len, GFP_ATOMIC); 362326b15dadSJamal Hadi Salim if (skb == NULL) 362426b15dadSJamal Hadi Salim return -ENOMEM; 362526b15dadSJamal Hadi Salim 362615e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); 36271d1e34ddSDavid S. Miller err = -EMSGSIZE; 362879b8b7f4SThomas Graf if (nlh == NULL) 36291d1e34ddSDavid S. Miller goto out_free_skb; 363026b15dadSJamal Hadi Salim 36317b67c857SThomas Graf p = nlmsg_data(nlh); 36320603eac0SHerbert Xu if (c->event == XFRM_MSG_DELPOLICY) { 3633c0144beaSThomas Graf struct nlattr *attr; 3634c0144beaSThomas Graf 36357b67c857SThomas Graf id = nlmsg_data(nlh); 36360603eac0SHerbert Xu memset(id, 0, sizeof(*id)); 36370603eac0SHerbert Xu id->dir = dir; 36380603eac0SHerbert Xu if (c->data.byid) 36390603eac0SHerbert Xu id->index = xp->index; 36400603eac0SHerbert Xu else 36410603eac0SHerbert Xu memcpy(&id->sel, &xp->selector, sizeof(id->sel)); 36420603eac0SHerbert Xu 3643c0144beaSThomas Graf attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); 36441d1e34ddSDavid S. Miller err = -EMSGSIZE; 3645c0144beaSThomas Graf if (attr == NULL) 36461d1e34ddSDavid S. Miller goto out_free_skb; 3647c0144beaSThomas Graf 3648c0144beaSThomas Graf p = nla_data(attr); 36490603eac0SHerbert Xu } 365026b15dadSJamal Hadi Salim 365126b15dadSJamal Hadi Salim copy_to_user_policy(xp, p, dir); 36521d1e34ddSDavid S. Miller err = copy_to_user_tmpl(xp, skb); 36531d1e34ddSDavid S. Miller if (!err) 36541d1e34ddSDavid S. Miller err = copy_to_user_policy_type(xp->type, skb); 36551d1e34ddSDavid S. Miller if (!err) 36561d1e34ddSDavid S. Miller err = xfrm_mark_put(skb, &xp->mark); 36577e652640SSteffen Klassert if (!err) 36587e652640SSteffen Klassert err = xfrm_if_id_put(skb, xp->if_id); 3659919e43faSLeon Romanovsky if (!err && xp->xdo.dev) 3660919e43faSLeon Romanovsky err = copy_user_offload(&xp->xdo, skb); 36611d1e34ddSDavid S. Miller if (err) 36621d1e34ddSDavid S. Miller goto out_free_skb; 3663295fae56SJamal Hadi Salim 36649825069dSThomas Graf nlmsg_end(skb, nlh); 366526b15dadSJamal Hadi Salim 366621ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 366726b15dadSJamal Hadi Salim 36681d1e34ddSDavid S. Miller out_free_skb: 366926b15dadSJamal Hadi Salim kfree_skb(skb); 36701d1e34ddSDavid S. Miller return err; 367126b15dadSJamal Hadi Salim } 367226b15dadSJamal Hadi Salim 3673214e005bSDavid S. Miller static int xfrm_notify_policy_flush(const struct km_event *c) 367426b15dadSJamal Hadi Salim { 36757067802eSAlexey Dobriyan struct net *net = c->net; 367626b15dadSJamal Hadi Salim struct nlmsghdr *nlh; 367726b15dadSJamal Hadi Salim struct sk_buff *skb; 36781d1e34ddSDavid S. Miller int err; 367926b15dadSJamal Hadi Salim 36807deb2264SThomas Graf skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); 368126b15dadSJamal Hadi Salim if (skb == NULL) 368226b15dadSJamal Hadi Salim return -ENOMEM; 368326b15dadSJamal Hadi Salim 368415e47304SEric W. Biederman nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); 36851d1e34ddSDavid S. Miller err = -EMSGSIZE; 368679b8b7f4SThomas Graf if (nlh == NULL) 36871d1e34ddSDavid S. Miller goto out_free_skb; 36881d1e34ddSDavid S. Miller err = copy_to_user_policy_type(c->data.type, skb); 36891d1e34ddSDavid S. Miller if (err) 36901d1e34ddSDavid S. Miller goto out_free_skb; 369126b15dadSJamal Hadi Salim 36929825069dSThomas Graf nlmsg_end(skb, nlh); 369326b15dadSJamal Hadi Salim 369421ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); 369526b15dadSJamal Hadi Salim 36961d1e34ddSDavid S. Miller out_free_skb: 369726b15dadSJamal Hadi Salim kfree_skb(skb); 36981d1e34ddSDavid S. Miller return err; 369926b15dadSJamal Hadi Salim } 370026b15dadSJamal Hadi Salim 3701214e005bSDavid S. Miller static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 370226b15dadSJamal Hadi Salim { 370326b15dadSJamal Hadi Salim 370426b15dadSJamal Hadi Salim switch (c->event) { 3705f60f6b8fSHerbert Xu case XFRM_MSG_NEWPOLICY: 3706f60f6b8fSHerbert Xu case XFRM_MSG_UPDPOLICY: 3707f60f6b8fSHerbert Xu case XFRM_MSG_DELPOLICY: 370826b15dadSJamal Hadi Salim return xfrm_notify_policy(xp, dir, c); 3709f60f6b8fSHerbert Xu case XFRM_MSG_FLUSHPOLICY: 371026b15dadSJamal Hadi Salim return xfrm_notify_policy_flush(c); 3711f60f6b8fSHerbert Xu case XFRM_MSG_POLEXPIRE: 371226b15dadSJamal Hadi Salim return xfrm_exp_policy_notify(xp, dir, c); 371326b15dadSJamal Hadi Salim default: 371462db5cfdSstephen hemminger printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", 371562db5cfdSstephen hemminger c->event); 371626b15dadSJamal Hadi Salim } 371726b15dadSJamal Hadi Salim 371826b15dadSJamal Hadi Salim return 0; 371926b15dadSJamal Hadi Salim 372026b15dadSJamal Hadi Salim } 372126b15dadSJamal Hadi Salim 3722a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_report_msgsize(void) 37237deb2264SThomas Graf { 37247deb2264SThomas Graf return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); 37257deb2264SThomas Graf } 37267deb2264SThomas Graf 372797a64b45SMasahide NAKAMURA static int build_report(struct sk_buff *skb, u8 proto, 372897a64b45SMasahide NAKAMURA struct xfrm_selector *sel, xfrm_address_t *addr) 372997a64b45SMasahide NAKAMURA { 373097a64b45SMasahide NAKAMURA struct xfrm_user_report *ur; 373197a64b45SMasahide NAKAMURA struct nlmsghdr *nlh; 373297a64b45SMasahide NAKAMURA 373379b8b7f4SThomas Graf nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); 373479b8b7f4SThomas Graf if (nlh == NULL) 373579b8b7f4SThomas Graf return -EMSGSIZE; 373697a64b45SMasahide NAKAMURA 37377b67c857SThomas Graf ur = nlmsg_data(nlh); 373897a64b45SMasahide NAKAMURA ur->proto = proto; 373997a64b45SMasahide NAKAMURA memcpy(&ur->sel, sel, sizeof(ur->sel)); 374097a64b45SMasahide NAKAMURA 37411d1e34ddSDavid S. Miller if (addr) { 37421d1e34ddSDavid S. Miller int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); 37431d1e34ddSDavid S. Miller if (err) { 37449825069dSThomas Graf nlmsg_cancel(skb, nlh); 37451d1e34ddSDavid S. Miller return err; 37461d1e34ddSDavid S. Miller } 37471d1e34ddSDavid S. Miller } 3748053c095aSJohannes Berg nlmsg_end(skb, nlh); 3749053c095aSJohannes Berg return 0; 375097a64b45SMasahide NAKAMURA } 375197a64b45SMasahide NAKAMURA 3752db983c11SAlexey Dobriyan static int xfrm_send_report(struct net *net, u8 proto, 3753db983c11SAlexey Dobriyan struct xfrm_selector *sel, xfrm_address_t *addr) 375497a64b45SMasahide NAKAMURA { 375597a64b45SMasahide NAKAMURA struct sk_buff *skb; 37562fc5f83bSGustavo A. R. Silva int err; 375797a64b45SMasahide NAKAMURA 37587deb2264SThomas Graf skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); 375997a64b45SMasahide NAKAMURA if (skb == NULL) 376097a64b45SMasahide NAKAMURA return -ENOMEM; 376197a64b45SMasahide NAKAMURA 37622fc5f83bSGustavo A. R. Silva err = build_report(skb, proto, sel, addr); 37632fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 376497a64b45SMasahide NAKAMURA 376521ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); 376697a64b45SMasahide NAKAMURA } 376797a64b45SMasahide NAKAMURA 3768a1b831f2SAlexey Dobriyan static inline unsigned int xfrm_mapping_msgsize(void) 37693a2dfbe8SMartin Willi { 37703a2dfbe8SMartin Willi return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); 37713a2dfbe8SMartin Willi } 37723a2dfbe8SMartin Willi 37733a2dfbe8SMartin Willi static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, 37743a2dfbe8SMartin Willi xfrm_address_t *new_saddr, __be16 new_sport) 37753a2dfbe8SMartin Willi { 37763a2dfbe8SMartin Willi struct xfrm_user_mapping *um; 37773a2dfbe8SMartin Willi struct nlmsghdr *nlh; 37783a2dfbe8SMartin Willi 37793a2dfbe8SMartin Willi nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); 37803a2dfbe8SMartin Willi if (nlh == NULL) 37813a2dfbe8SMartin Willi return -EMSGSIZE; 37823a2dfbe8SMartin Willi 37833a2dfbe8SMartin Willi um = nlmsg_data(nlh); 37843a2dfbe8SMartin Willi 37853a2dfbe8SMartin Willi memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); 37863a2dfbe8SMartin Willi um->id.spi = x->id.spi; 37873a2dfbe8SMartin Willi um->id.family = x->props.family; 37883a2dfbe8SMartin Willi um->id.proto = x->id.proto; 37893a2dfbe8SMartin Willi memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); 37903a2dfbe8SMartin Willi memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); 37913a2dfbe8SMartin Willi um->new_sport = new_sport; 37923a2dfbe8SMartin Willi um->old_sport = x->encap->encap_sport; 37933a2dfbe8SMartin Willi um->reqid = x->props.reqid; 37943a2dfbe8SMartin Willi 3795053c095aSJohannes Berg nlmsg_end(skb, nlh); 3796053c095aSJohannes Berg return 0; 37973a2dfbe8SMartin Willi } 37983a2dfbe8SMartin Willi 37993a2dfbe8SMartin Willi static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, 38003a2dfbe8SMartin Willi __be16 sport) 38013a2dfbe8SMartin Willi { 3802a6483b79SAlexey Dobriyan struct net *net = xs_net(x); 38033a2dfbe8SMartin Willi struct sk_buff *skb; 38042fc5f83bSGustavo A. R. Silva int err; 38053a2dfbe8SMartin Willi 38063a2dfbe8SMartin Willi if (x->id.proto != IPPROTO_ESP) 38073a2dfbe8SMartin Willi return -EINVAL; 38083a2dfbe8SMartin Willi 38093a2dfbe8SMartin Willi if (!x->encap) 38103a2dfbe8SMartin Willi return -EINVAL; 38113a2dfbe8SMartin Willi 38123a2dfbe8SMartin Willi skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); 38133a2dfbe8SMartin Willi if (skb == NULL) 38143a2dfbe8SMartin Willi return -ENOMEM; 38153a2dfbe8SMartin Willi 38162fc5f83bSGustavo A. R. Silva err = build_mapping(skb, x, ipaddr, sport); 38172fc5f83bSGustavo A. R. Silva BUG_ON(err < 0); 38183a2dfbe8SMartin Willi 381921ee543eSMichal Kubecek return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); 38203a2dfbe8SMartin Willi } 38213a2dfbe8SMartin Willi 38220f24558eSHoria Geanta static bool xfrm_is_alive(const struct km_event *c) 38230f24558eSHoria Geanta { 38240f24558eSHoria Geanta return (bool)xfrm_acquire_is_on(c->net); 38250f24558eSHoria Geanta } 38260f24558eSHoria Geanta 38271da177e4SLinus Torvalds static struct xfrm_mgr netlink_mgr = { 38281da177e4SLinus Torvalds .notify = xfrm_send_state_notify, 38291da177e4SLinus Torvalds .acquire = xfrm_send_acquire, 38301da177e4SLinus Torvalds .compile_policy = xfrm_compile_policy, 38311da177e4SLinus Torvalds .notify_policy = xfrm_send_policy_notify, 383297a64b45SMasahide NAKAMURA .report = xfrm_send_report, 38335c79de6eSShinta Sugimoto .migrate = xfrm_send_migrate, 38343a2dfbe8SMartin Willi .new_mapping = xfrm_send_mapping, 38350f24558eSHoria Geanta .is_alive = xfrm_is_alive, 38361da177e4SLinus Torvalds }; 38371da177e4SLinus Torvalds 3838a6483b79SAlexey Dobriyan static int __net_init xfrm_user_net_init(struct net *net) 38391da177e4SLinus Torvalds { 3840be33690dSPatrick McHardy struct sock *nlsk; 3841a31f2d17SPablo Neira Ayuso struct netlink_kernel_cfg cfg = { 3842a31f2d17SPablo Neira Ayuso .groups = XFRMNLGRP_MAX, 3843a31f2d17SPablo Neira Ayuso .input = xfrm_netlink_rcv, 3844a31f2d17SPablo Neira Ayuso }; 3845be33690dSPatrick McHardy 38469f00d977SPablo Neira Ayuso nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); 3847be33690dSPatrick McHardy if (nlsk == NULL) 38481da177e4SLinus Torvalds return -ENOMEM; 3849d79d792eSEric W. Biederman net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ 3850cf778b00SEric Dumazet rcu_assign_pointer(net->xfrm.nlsk, nlsk); 38511da177e4SLinus Torvalds return 0; 38521da177e4SLinus Torvalds } 38531da177e4SLinus Torvalds 38546218fe18SFlorian Westphal static void __net_exit xfrm_user_net_pre_exit(struct net *net) 38556218fe18SFlorian Westphal { 38566218fe18SFlorian Westphal RCU_INIT_POINTER(net->xfrm.nlsk, NULL); 38576218fe18SFlorian Westphal } 38586218fe18SFlorian Westphal 3859d79d792eSEric W. Biederman static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) 3860a6483b79SAlexey Dobriyan { 3861d79d792eSEric W. Biederman struct net *net; 38626218fe18SFlorian Westphal 3863d79d792eSEric W. Biederman list_for_each_entry(net, net_exit_list, exit_list) 3864d79d792eSEric W. Biederman netlink_kernel_release(net->xfrm.nlsk_stash); 3865a6483b79SAlexey Dobriyan } 3866a6483b79SAlexey Dobriyan 3867a6483b79SAlexey Dobriyan static struct pernet_operations xfrm_user_net_ops = { 3868a6483b79SAlexey Dobriyan .init = xfrm_user_net_init, 38696218fe18SFlorian Westphal .pre_exit = xfrm_user_net_pre_exit, 3870d79d792eSEric W. Biederman .exit_batch = xfrm_user_net_exit, 3871a6483b79SAlexey Dobriyan }; 3872a6483b79SAlexey Dobriyan 3873a6483b79SAlexey Dobriyan static int __init xfrm_user_init(void) 3874a6483b79SAlexey Dobriyan { 3875a6483b79SAlexey Dobriyan int rv; 3876a6483b79SAlexey Dobriyan 3877a6483b79SAlexey Dobriyan printk(KERN_INFO "Initializing XFRM netlink socket\n"); 3878a6483b79SAlexey Dobriyan 3879a6483b79SAlexey Dobriyan rv = register_pernet_subsys(&xfrm_user_net_ops); 3880a6483b79SAlexey Dobriyan if (rv < 0) 3881a6483b79SAlexey Dobriyan return rv; 3882f41b284aSZhengchao Shao xfrm_register_km(&netlink_mgr); 3883f41b284aSZhengchao Shao return 0; 3884a6483b79SAlexey Dobriyan } 3885a6483b79SAlexey Dobriyan 38861da177e4SLinus Torvalds static void __exit xfrm_user_exit(void) 38871da177e4SLinus Torvalds { 38881da177e4SLinus Torvalds xfrm_unregister_km(&netlink_mgr); 3889a6483b79SAlexey Dobriyan unregister_pernet_subsys(&xfrm_user_net_ops); 38901da177e4SLinus Torvalds } 38911da177e4SLinus Torvalds 38921da177e4SLinus Torvalds module_init(xfrm_user_init); 38931da177e4SLinus Torvalds module_exit(xfrm_user_exit); 38941da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 38954fdb3bb7SHarald Welte MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); 3896