| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David S. Miller | 4733 | 21.58% | 20 | 5.39% |
| Jamal Hadi Salim | 3145 | 14.34% | 24 | 6.47% |
| Herbert Xu | 2044 | 9.32% | 45 | 12.13% |
| Steffen Klassert | 1518 | 6.92% | 18 | 4.85% |
| Thomas Graf | 1479 | 6.74% | 16 | 4.31% |
| Martin Willi | 926 | 4.22% | 3 | 0.81% |
| Masahide Nakamura | 820 | 3.74% | 8 | 2.16% |
| Shinta Sugimoto | 781 | 3.56% | 2 | 0.54% |
| Sabrina Dubroca | 729 | 3.32% | 20 | 5.39% |
| Alexey Dobriyan | 656 | 2.99% | 21 | 5.66% |
| Antony Antony | 593 | 2.70% | 4 | 1.08% |
| Christophe Gouault | 502 | 2.29% | 1 | 0.27% |
| Nicolas Dichtel | 443 | 2.02% | 10 | 2.70% |
| Trent Jaeger | 325 | 1.48% | 2 | 0.54% |
| Dmitry Safonov | 282 | 1.29% | 3 | 0.81% |
| Arnaud Ebalard | 278 | 1.27% | 2 | 0.54% |
| Mathias Krause | 259 | 1.18% | 15 | 4.04% |
| Johannes Berg | 230 | 1.05% | 5 | 1.35% |
| Alexey Kuznetsov | 210 | 0.96% | 6 | 1.62% |
| Timo Teräs | 170 | 0.78% | 3 | 0.81% |
| Leon Romanovsky | 164 | 0.75% | 6 | 1.62% |
| Fan Du | 117 | 0.53% | 8 | 2.16% |
| Gustavo A. R. Silva | 87 | 0.40% | 1 | 0.27% |
| Joy Latten | 86 | 0.39% | 4 | 1.08% |
| Linus Torvalds (pre-git) | 72 | 0.33% | 13 | 3.50% |
| Eric W. Biedermann | 70 | 0.32% | 7 | 1.89% |
| Serge E. Hallyn | 65 | 0.30% | 1 | 0.27% |
| Lin Ma | 53 | 0.24% | 4 | 1.08% |
| Michal Kubeček | 52 | 0.24% | 2 | 0.54% |
| James Morris | 48 | 0.22% | 3 | 0.81% |
| Yossi Kuperman | 45 | 0.21% | 1 | 0.27% |
| Patrick McHardy | 43 | 0.20% | 4 | 1.08% |
| Tom Lendacky | 42 | 0.19% | 1 | 0.27% |
| Pablo Neira Ayuso | 40 | 0.18% | 2 | 0.54% |
| Florian Westphal | 39 | 0.18% | 4 | 1.08% |
| Tobias Brunner | 36 | 0.16% | 1 | 0.27% |
| Xin Long | 35 | 0.16% | 3 | 0.81% |
| Sowmini Varadhan | 35 | 0.16% | 1 | 0.27% |
| Pavel Skripkin | 33 | 0.15% | 2 | 0.54% |
| Kunihiro Ishiguro | 33 | 0.15% | 2 | 0.54% |
| Lorenzo Colitti | 31 | 0.14% | 1 | 0.27% |
| Arnaldo Carvalho de Melo | 30 | 0.14% | 2 | 0.54% |
| Andy Whitcroft | 29 | 0.13% | 2 | 0.54% |
| Eric Dumazet | 29 | 0.13% | 5 | 1.35% |
| Ding Zhi | 28 | 0.13% | 1 | 0.27% |
| Horia Geantă | 28 | 0.13% | 1 | 0.27% |
| Catherine Zhang | 26 | 0.12% | 1 | 0.27% |
| Harald Welte | 26 | 0.12% | 2 | 0.54% |
| Michael Rossberg | 26 | 0.12% | 1 | 0.27% |
| Paul Moore | 25 | 0.11% | 1 | 0.27% |
| Yan Yan | 24 | 0.11% | 1 | 0.27% |
| Américo Wang | 23 | 0.10% | 4 | 1.08% |
| Anirudh Gupta | 22 | 0.10% | 1 | 0.27% |
| Eric Paris | 20 | 0.09% | 3 | 0.81% |
| Ilpo Järvinen | 19 | 0.09% | 1 | 0.27% |
| Vegard Nossum | 19 | 0.09% | 2 | 0.54% |
| Hideaki Yoshifuji / 吉藤英明 | 16 | 0.07% | 4 | 1.08% |
| Sean Tranchetti | 15 | 0.07% | 1 | 0.27% |
| Christoph Hellwig | 14 | 0.06% | 1 | 0.27% |
| Raed Salem | 13 | 0.06% | 1 | 0.27% |
| Thomas Walpuski | 13 | 0.06% | 1 | 0.27% |
| Denis V. Lunev | 13 | 0.06% | 3 | 0.81% |
| Nathan Chancellor | 12 | 0.05% | 1 | 0.27% |
| Miika Komu | 10 | 0.05% | 1 | 0.27% |
| Andrzej Hajda | 9 | 0.04% | 1 | 0.27% |
| Tetsuo Handa | 8 | 0.04% | 1 | 0.27% |
| Venkat Yekkirala | 7 | 0.03% | 1 | 0.27% |
| John Williams Floroiu | 6 | 0.03% | 1 | 0.27% |
| Nikolay Aleksandrov | 6 | 0.03% | 1 | 0.27% |
| Ilan Tayari | 5 | 0.02% | 1 | 0.27% |
| Kazunori Miyazawa | 5 | 0.02% | 1 | 0.27% |
| Breno Leitão | 5 | 0.02% | 1 | 0.27% |
| Greg Kroah-Hartman | 4 | 0.02% | 1 | 0.27% |
| Arjan van de Ven | 4 | 0.02% | 1 | 0.27% |
| Krishna Kumar | 4 | 0.02% | 1 | 0.27% |
| Stephen Hemminger | 3 | 0.01% | 2 | 0.54% |
| David Ahern | 3 | 0.01% | 1 | 0.27% |
| Diego Beltrami | 3 | 0.01% | 1 | 0.27% |
| Stephen D. Smalley | 3 | 0.01% | 1 | 0.27% |
| Wei Yongjun | 3 | 0.01% | 1 | 0.27% |
| Noriaki Takamiya | 3 | 0.01% | 1 | 0.27% |
| Andi Kleen | 3 | 0.01% | 1 | 0.27% |
| Yue haibing | 3 | 0.01% | 1 | 0.27% |
| Dave Jones | 2 | 0.01% | 1 | 0.27% |
| Zheng Yongjun | 2 | 0.01% | 1 | 0.27% |
| Lucas De Marchi | 2 | 0.01% | 1 | 0.27% |
| Bhaskar Chowdhury | 1 | 0.00% | 1 | 0.27% |
| Kees Cook | 1 | 0.00% | 1 | 0.27% |
| Darrel Goeddel | 1 | 0.00% | 1 | 0.27% |
| Adrian Bunk | 1 | 0.00% | 1 | 0.27% |
| Zhengchao Shao | 1 | 0.00% | 1 | 0.27% |
| Michal Ludvig | 1 | 0.00% | 1 | 0.27% |
| Thomas Gleixner | 1 | 0.00% | 1 | 0.27% |
| Linus Torvalds | 1 | 0.00% | 1 | 0.27% |
| Total | 21930 | 371 |
// SPDX-License-Identifier: GPL-2.0-only /* xfrm_user.c: User interface to configure xfrm engine. * * Copyright (C) 2002 David S. Miller (davem@redhat.com) * * Changes: * Mitsuru KANDA @USAGI * Kazunori MIYAZAWA @USAGI * Kunihiro Ishiguro <kunihiro@ipinfusion.com> * IPv6 support * */ #include <linux/compat.h> #include <linux/crypto.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/socket.h> #include <linux/string.h> #include <linux/net.h> #include <linux/skbuff.h> #include <linux/pfkeyv2.h> #include <linux/ipsec.h> #include <linux/init.h> #include <linux/security.h> #include <net/sock.h> #include <net/xfrm.h> #include <net/netlink.h> #include <net/ah.h> #include <linux/uaccess.h> #if IS_ENABLED(CONFIG_IPV6) #include <linux/in6.h> #endif #include <asm/unaligned.h> static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[type]; struct xfrm_algo *algp; if (!rt) return 0; algp = nla_data(rt); if (nla_len(rt) < (int)xfrm_alg_len(algp)) { NL_SET_ERR_MSG(extack, "Invalid AUTH/CRYPT/COMP attribute length"); return -EINVAL; } switch (type) { case XFRMA_ALG_AUTH: case XFRMA_ALG_CRYPT: case XFRMA_ALG_COMP: break; default: NL_SET_ERR_MSG(extack, "Invalid algorithm attribute type"); return -EINVAL; } algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; return 0; } static int verify_auth_trunc(struct nlattr **attrs, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; struct xfrm_algo_auth *algp; if (!rt) return 0; algp = nla_data(rt); if (nla_len(rt) < (int)xfrm_alg_auth_len(algp)) { NL_SET_ERR_MSG(extack, "Invalid AUTH_TRUNC attribute length"); return -EINVAL; } algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; return 0; } static int verify_aead(struct nlattr **attrs, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; struct xfrm_algo_aead *algp; if (!rt) return 0; algp = nla_data(rt); if (nla_len(rt) < (int)aead_len(algp)) { NL_SET_ERR_MSG(extack, "Invalid AEAD attribute length"); return -EINVAL; } algp->alg_name[sizeof(algp->alg_name) - 1] = '\0'; return 0; } static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, xfrm_address_t **addrp) { struct nlattr *rt = attrs[type]; if (rt && addrp) *addrp = nla_data(rt); } static inline int verify_sec_ctx_len(struct nlattr **attrs, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_user_sec_ctx *uctx; if (!rt) return 0; uctx = nla_data(rt); if (uctx->len > nla_len(rt) || uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) { NL_SET_ERR_MSG(extack, "Invalid security context length"); return -EINVAL; } return 0; } static inline int verify_replay(struct xfrm_usersa_info *p, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; struct xfrm_replay_state_esn *rs; if (!rt) { if (p->flags & XFRM_STATE_ESN) { NL_SET_ERR_MSG(extack, "Missing required attribute for ESN"); return -EINVAL; } return 0; } rs = nla_data(rt); if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) { NL_SET_ERR_MSG(extack, "ESN bitmap length must be <= 128"); return -EINVAL; } if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) && nla_len(rt) != sizeof(*rs)) { NL_SET_ERR_MSG(extack, "ESN attribute is too short to fit the full bitmap length"); return -EINVAL; } /* As only ESP and AH support ESN feature. */ if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) { NL_SET_ERR_MSG(extack, "ESN only supported for ESP and AH"); return -EINVAL; } if (p->replay_window != 0) { NL_SET_ERR_MSG(extack, "ESN not compatible with legacy replay_window"); return -EINVAL; } return 0; } static int verify_newsa_info(struct xfrm_usersa_info *p, struct nlattr **attrs, struct netlink_ext_ack *extack) { int err; err = -EINVAL; switch (p->family) { case AF_INET: break; case AF_INET6: #if IS_ENABLED(CONFIG_IPV6) break; #else err = -EAFNOSUPPORT; NL_SET_ERR_MSG(extack, "IPv6 support disabled"); goto out; #endif default: NL_SET_ERR_MSG(extack, "Invalid address family"); goto out; } switch (p->sel.family) { case AF_UNSPEC: break; case AF_INET: if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) { NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)"); goto out; } break; case AF_INET6: #if IS_ENABLED(CONFIG_IPV6) if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) { NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)"); goto out; } break; #else NL_SET_ERR_MSG(extack, "IPv6 support disabled"); err = -EAFNOSUPPORT; goto out; #endif default: NL_SET_ERR_MSG(extack, "Invalid address family in selector"); goto out; } err = -EINVAL; switch (p->id.proto) { case IPPROTO_AH: if (!attrs[XFRMA_ALG_AUTH] && !attrs[XFRMA_ALG_AUTH_TRUNC]) { NL_SET_ERR_MSG(extack, "Missing required attribute for AH: AUTH_TRUNC or AUTH"); goto out; } if (attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_ALG_COMP] || attrs[XFRMA_TFCPAD]) { NL_SET_ERR_MSG(extack, "Invalid attributes for AH: AEAD, CRYPT, COMP, TFCPAD"); goto out; } break; case IPPROTO_ESP: if (attrs[XFRMA_ALG_COMP]) { NL_SET_ERR_MSG(extack, "Invalid attribute for ESP: COMP"); goto out; } if (!attrs[XFRMA_ALG_AUTH] && !attrs[XFRMA_ALG_AUTH_TRUNC] && !attrs[XFRMA_ALG_CRYPT] && !attrs[XFRMA_ALG_AEAD]) { NL_SET_ERR_MSG(extack, "Missing required attribute for ESP: at least one of AUTH, AUTH_TRUNC, CRYPT, AEAD"); goto out; } if ((attrs[XFRMA_ALG_AUTH] || attrs[XFRMA_ALG_AUTH_TRUNC] || attrs[XFRMA_ALG_CRYPT]) && attrs[XFRMA_ALG_AEAD]) { NL_SET_ERR_MSG(extack, "Invalid attribute combination for ESP: AEAD can't be used with AUTH, AUTH_TRUNC, CRYPT"); goto out; } if (attrs[XFRMA_TFCPAD] && p->mode != XFRM_MODE_TUNNEL) { NL_SET_ERR_MSG(extack, "TFC padding can only be used in tunnel mode"); goto out; } break; case IPPROTO_COMP: if (!attrs[XFRMA_ALG_COMP]) { NL_SET_ERR_MSG(extack, "Missing required attribute for COMP: COMP"); goto out; } if (attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_AUTH] || attrs[XFRMA_ALG_AUTH_TRUNC] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_TFCPAD]) { NL_SET_ERR_MSG(extack, "Invalid attributes for COMP: AEAD, AUTH, AUTH_TRUNC, CRYPT, TFCPAD"); goto out; } if (ntohl(p->id.spi) >= 0x10000) { NL_SET_ERR_MSG(extack, "SPI is too large for COMP (must be < 0x10000)"); goto out; } break; #if IS_ENABLED(CONFIG_IPV6) case IPPROTO_DSTOPTS: case IPPROTO_ROUTING: if (attrs[XFRMA_ALG_COMP] || attrs[XFRMA_ALG_AUTH] || attrs[XFRMA_ALG_AUTH_TRUNC] || attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_ENCAP] || attrs[XFRMA_SEC_CTX] || attrs[XFRMA_TFCPAD]) { NL_SET_ERR_MSG(extack, "Invalid attributes for DSTOPTS/ROUTING"); goto out; } if (!attrs[XFRMA_COADDR]) { NL_SET_ERR_MSG(extack, "Missing required COADDR attribute for DSTOPTS/ROUTING"); goto out; } break; #endif default: NL_SET_ERR_MSG(extack, "Unsupported protocol"); goto out; } if ((err = verify_aead(attrs, extack))) goto out; if ((err = verify_auth_trunc(attrs, extack))) goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH, extack))) goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT, extack))) goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP, extack))) goto out; if ((err = verify_sec_ctx_len(attrs, extack))) goto out; if ((err = verify_replay(p, attrs, extack))) goto out; err = -EINVAL; switch (p->mode) { case XFRM_MODE_TRANSPORT: case XFRM_MODE_TUNNEL: case XFRM_MODE_ROUTEOPTIMIZATION: case XFRM_MODE_BEET: break; default: NL_SET_ERR_MSG(extack, "Unsupported mode"); goto out; } err = 0; if (attrs[XFRMA_MTIMER_THRESH]) { if (!attrs[XFRMA_ENCAP]) { NL_SET_ERR_MSG(extack, "MTIMER_THRESH attribute can only be set on ENCAP states"); err = -EINVAL; goto out; } } out: return err; } static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, struct xfrm_algo_desc *(*get_byname)(const char *, int), struct nlattr *rta, struct netlink_ext_ack *extack) { struct xfrm_algo *p, *ualg; struct xfrm_algo_desc *algo; if (!rta) return 0; ualg = nla_data(rta); algo = get_byname(ualg->alg_name, 1); if (!algo) { NL_SET_ERR_MSG(extack, "Requested COMP algorithm not found"); return -ENOSYS; } *props = algo->desc.sadb_alg_id; p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); if (!p) return -ENOMEM; strcpy(p->alg_name, algo->name); *algpp = p; return 0; } static int attach_crypt(struct xfrm_state *x, struct nlattr *rta, struct netlink_ext_ack *extack) { struct xfrm_algo *p, *ualg; struct xfrm_algo_desc *algo; if (!rta) return 0; ualg = nla_data(rta); algo = xfrm_ealg_get_byname(ualg->alg_name, 1); if (!algo) { NL_SET_ERR_MSG(extack, "Requested CRYPT algorithm not found"); return -ENOSYS; } x->props.ealgo = algo->desc.sadb_alg_id; p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); if (!p) return -ENOMEM; strcpy(p->alg_name, algo->name); x->ealg = p; x->geniv = algo->uinfo.encr.geniv; return 0; } static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, struct nlattr *rta, struct netlink_ext_ack *extack) { struct xfrm_algo *ualg; struct xfrm_algo_auth *p; struct xfrm_algo_desc *algo; if (!rta) return 0; ualg = nla_data(rta); algo = xfrm_aalg_get_byname(ualg->alg_name, 1); if (!algo) { NL_SET_ERR_MSG(extack, "Requested AUTH algorithm not found"); return -ENOSYS; } *props = algo->desc.sadb_alg_id; p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); if (!p) return -ENOMEM; strcpy(p->alg_name, algo->name); p->alg_key_len = ualg->alg_key_len; p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); *algpp = p; return 0; } static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, struct nlattr *rta, struct netlink_ext_ack *extack) { struct xfrm_algo_auth *p, *ualg; struct xfrm_algo_desc *algo; if (!rta) return 0; ualg = nla_data(rta); algo = xfrm_aalg_get_byname(ualg->alg_name, 1); if (!algo) { NL_SET_ERR_MSG(extack, "Requested AUTH_TRUNC algorithm not found"); return -ENOSYS; } if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) { NL_SET_ERR_MSG(extack, "Invalid length requested for truncated ICV"); return -EINVAL; } *props = algo->desc.sadb_alg_id; p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); if (!p) return -ENOMEM; strcpy(p->alg_name, algo->name); if (!p->alg_trunc_len) p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; *algpp = p; return 0; } static int attach_aead(struct xfrm_state *x, struct nlattr *rta, struct netlink_ext_ack *extack) { struct xfrm_algo_aead *p, *ualg; struct xfrm_algo_desc *algo; if (!rta) return 0; ualg = nla_data(rta); algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); if (!algo) { NL_SET_ERR_MSG(extack, "Requested AEAD algorithm not found"); return -ENOSYS; } x->props.ealgo = algo->desc.sadb_alg_id; p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); if (!p) return -ENOMEM; strcpy(p->alg_name, algo->name); x->aead = p; x->geniv = algo->uinfo.aead.geniv; return 0; } static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, struct nlattr *rp, struct netlink_ext_ack *extack) { struct xfrm_replay_state_esn *up; unsigned int ulen; if (!replay_esn || !rp) return 0; up = nla_data(rp); ulen = xfrm_replay_state_esn_len(up); /* Check the overall length and the internal bitmap length to avoid * potential overflow. */ if (nla_len(rp) < (int)ulen) { NL_SET_ERR_MSG(extack, "ESN attribute is too short"); return -EINVAL; } if (xfrm_replay_state_esn_len(replay_esn) != ulen) { NL_SET_ERR_MSG(extack, "New ESN size doesn't match the existing SA's ESN size"); return -EINVAL; } if (replay_esn->bmp_len != up->bmp_len) { NL_SET_ERR_MSG(extack, "New ESN bitmap size doesn't match the existing SA's ESN bitmap"); return -EINVAL; } if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) { NL_SET_ERR_MSG(extack, "ESN replay window is longer than the bitmap"); return -EINVAL; } return 0; } static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, struct xfrm_replay_state_esn **preplay_esn, struct nlattr *rta) { struct xfrm_replay_state_esn *p, *pp, *up; unsigned int klen, ulen; if (!rta) return 0; up = nla_data(rta); klen = xfrm_replay_state_esn_len(up); ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up); p = kzalloc(klen, GFP_KERNEL); if (!p) return -ENOMEM; pp = kzalloc(klen, GFP_KERNEL); if (!pp) { kfree(p); return -ENOMEM; } memcpy(p, up, ulen); memcpy(pp, up, ulen); *replay_esn = p; *preplay_esn = pp; return 0; } static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) { unsigned int len = 0; if (xfrm_ctx) { len += sizeof(struct xfrm_user_sec_ctx); len += xfrm_ctx->ctx_len; } return len; } static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) { memcpy(&x->id, &p->id, sizeof(x->id)); memcpy(&x->sel, &p->sel, sizeof(x->sel)); memcpy(&x->lft, &p->lft, sizeof(x->lft)); x->props.mode = p->mode; x->props.replay_window = min_t(unsigned int, p->replay_window, sizeof(x->replay.bitmap) * 8); x->props.reqid = p->reqid; x->props.family = p->family; memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); x->props.flags = p->flags; if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) x->sel.family = p->family; } /* * someday when pfkey also has support, we could have the code * somehow made shareable and move it to xfrm_state.c - JHS * */ static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, int update_esn) { struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH]; if (re && x->replay_esn && x->preplay_esn) { struct xfrm_replay_state_esn *replay_esn; replay_esn = nla_data(re); memcpy(x->replay_esn, replay_esn, xfrm_replay_state_esn_len(replay_esn)); memcpy(x->preplay_esn, replay_esn, xfrm_replay_state_esn_len(replay_esn)); } if (rp) { struct xfrm_replay_state *replay; replay = nla_data(rp); memcpy(&x->replay, replay, sizeof(*replay)); memcpy(&x->preplay, replay, sizeof(*replay)); } if (lt) { struct xfrm_lifetime_cur *ltime; ltime = nla_data(lt); x->curlft.bytes = ltime->bytes; x->curlft.packets = ltime->packets; x->curlft.add_time = ltime->add_time; x->curlft.use_time = ltime->use_time; } if (et) x->replay_maxage = nla_get_u32(et); if (rt) x->replay_maxdiff = nla_get_u32(rt); if (mt) x->mapping_maxage = nla_get_u32(mt); } static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m) { if (attrs[XFRMA_SET_MARK]) { m->v = nla_get_u32(attrs[XFRMA_SET_MARK]); if (attrs[XFRMA_SET_MARK_MASK]) m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]); else m->m = 0xffffffff; } else { m->v = m->m = 0; } } static struct xfrm_state *xfrm_state_construct(struct net *net, struct xfrm_usersa_info *p, struct nlattr **attrs, int *errp, struct netlink_ext_ack *extack) { struct xfrm_state *x = xfrm_state_alloc(net); int err = -ENOMEM; if (!x) goto error_no_put; copy_from_user_state(x, p); if (attrs[XFRMA_ENCAP]) { x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), sizeof(*x->encap), GFP_KERNEL); if (x->encap == NULL) goto error; } if (attrs[XFRMA_COADDR]) { x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), sizeof(*x->coaddr), GFP_KERNEL); if (x->coaddr == NULL) goto error; } if (attrs[XFRMA_SA_EXTRA_FLAGS]) x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD], extack))) goto error; if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, attrs[XFRMA_ALG_AUTH_TRUNC], extack))) goto error; if (!x->props.aalgo) { if ((err = attach_auth(&x->aalg, &x->props.aalgo, attrs[XFRMA_ALG_AUTH], extack))) goto error; } if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT], extack))) goto error; if ((err = attach_one_algo(&x->calg, &x->props.calgo, xfrm_calg_get_byname, attrs[XFRMA_ALG_COMP], extack))) goto error; if (attrs[XFRMA_TFCPAD]) x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); xfrm_mark_get(attrs, &x->mark); xfrm_smark_init(attrs, &x->props.smark); if (attrs[XFRMA_IF_ID]) x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV], extack); if (err) goto error; if (attrs[XFRMA_SEC_CTX]) { err = security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])); if (err) goto error; } if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, attrs[XFRMA_REPLAY_ESN_VAL]))) goto error; x->km.seq = p->seq; x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; /* sysctl_xfrm_aevent_etime is in 100ms units */ x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; if ((err = xfrm_init_replay(x, extack))) goto error; /* override default values from above */ xfrm_update_ae_params(x, attrs, 0); /* configure the hardware if offload is requested */ if (attrs[XFRMA_OFFLOAD_DEV]) { err = xfrm_dev_state_add(net, x, nla_data(attrs[XFRMA_OFFLOAD_DEV]), extack); if (err) goto error; } return x; error: x->km.state = XFRM_STATE_DEAD; xfrm_state_put(x); error_no_put: *errp = err; return NULL; } static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_usersa_info *p = nlmsg_data(nlh); struct xfrm_state *x; int err; struct km_event c; err = verify_newsa_info(p, attrs, extack); if (err) return err; x = xfrm_state_construct(net, p, attrs, &err, extack); if (!x) return err; xfrm_state_hold(x); if (nlh->nlmsg_type == XFRM_MSG_NEWSA) err = xfrm_state_add(x); else err = xfrm_state_update(x); xfrm_audit_state_add(x, err ? 0 : 1, true); if (err < 0) { x->km.state = XFRM_STATE_DEAD; xfrm_dev_state_delete(x); __xfrm_state_put(x); goto out; } if (x->km.state == XFRM_STATE_VOID) x->km.state = XFRM_STATE_VALID; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; c.event = nlh->nlmsg_type; km_state_notify(x, &c); out: xfrm_state_put(x); return err; } static struct xfrm_state *xfrm_user_state_lookup(struct net *net, struct xfrm_usersa_id *p, struct nlattr **attrs, int *errp) { struct xfrm_state *x = NULL; struct xfrm_mark m; int err; u32 mark = xfrm_mark_get(attrs, &m); if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { err = -ESRCH; x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); } else { xfrm_address_t *saddr = NULL; verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); if (!saddr) { err = -EINVAL; goto out; } err = -ESRCH; x = xfrm_state_lookup_byaddr(net, mark, &p->daddr, saddr, p->proto, p->family); } out: if (!x && errp) *errp = err; return x; } static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_state *x; int err = -ESRCH; struct km_event c; struct xfrm_usersa_id *p = nlmsg_data(nlh); x = xfrm_user_state_lookup(net, p, attrs, &err); if (x == NULL) return err; if ((err = security_xfrm_state_delete(x)) != 0) goto out; if (xfrm_state_kern(x)) { NL_SET_ERR_MSG(extack, "SA is in use by tunnels"); err = -EPERM; goto out; } err = xfrm_state_delete(x); if (err < 0) goto out; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; c.event = nlh->nlmsg_type; km_state_notify(x, &c); out: xfrm_audit_state_delete(x, err ? 0 : 1, true); xfrm_state_put(x); return err; } static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) { memset(p, 0, sizeof(*p)); memcpy(&p->id, &x->id, sizeof(p->id)); memcpy(&p->sel, &x->sel, sizeof(p->sel)); memcpy(&p->lft, &x->lft, sizeof(p->lft)); if (x->xso.dev) xfrm_dev_state_update_curlft(x); memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); put_unaligned(x->stats.replay_window, &p->stats.replay_window); put_unaligned(x->stats.replay, &p->stats.replay); put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed); memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); p->mode = x->props.mode; p->replay_window = x->props.replay_window; p->reqid = x->props.reqid; p->family = x->props.family; p->flags = x->props.flags; p->seq = x->km.seq; } struct xfrm_dump_info { struct sk_buff *in_skb; struct sk_buff *out_skb; u32 nlmsg_seq; u16 nlmsg_flags; }; static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) { struct xfrm_user_sec_ctx *uctx; struct nlattr *attr; int ctx_size = sizeof(*uctx) + s->ctx_len; attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); if (attr == NULL) return -EMSGSIZE; uctx = nla_data(attr); uctx->exttype = XFRMA_SEC_CTX; uctx->len = ctx_size; uctx->ctx_doi = s->ctx_doi; uctx->ctx_alg = s->ctx_alg; uctx->ctx_len = s->ctx_len; memcpy(uctx + 1, s->ctx_str, s->ctx_len); return 0; } static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb) { struct xfrm_user_offload *xuo; struct nlattr *attr; attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo)); if (attr == NULL) return -EMSGSIZE; xuo = nla_data(attr); memset(xuo, 0, sizeof(*xuo)); xuo->ifindex = xso->dev->ifindex; if (xso->dir == XFRM_DEV_OFFLOAD_IN) xuo->flags = XFRM_OFFLOAD_INBOUND; if (xso->type == XFRM_DEV_OFFLOAD_PACKET) xuo->flags |= XFRM_OFFLOAD_PACKET; return 0; } static bool xfrm_redact(void) { return IS_ENABLED(CONFIG_SECURITY) && security_locked_down(LOCKDOWN_XFRM_SECRET); } static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) { struct xfrm_algo *algo; struct xfrm_algo_auth *ap; struct nlattr *nla; bool redact_secret = xfrm_redact(); nla = nla_reserve(skb, XFRMA_ALG_AUTH, sizeof(*algo) + (auth->alg_key_len + 7) / 8); if (!nla) return -EMSGSIZE; algo = nla_data(nla); strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); if (redact_secret && auth->alg_key_len) memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8); else memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); algo->alg_key_len = auth->alg_key_len; nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth)); if (!nla) return -EMSGSIZE; ap = nla_data(nla); memcpy(ap, auth, sizeof(struct xfrm_algo_auth)); if (redact_secret && auth->alg_key_len) memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8); else memcpy(ap->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); return 0; } static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb) { struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead)); struct xfrm_algo_aead *ap; bool redact_secret = xfrm_redact(); if (!nla) return -EMSGSIZE; ap = nla_data(nla); strscpy_pad(ap->alg_name, aead->alg_name, sizeof(ap->alg_name)); ap->alg_key_len = aead->alg_key_len; ap->alg_icv_len = aead->alg_icv_len; if (redact_secret && aead->alg_key_len) memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8); else memcpy(ap->alg_key, aead->alg_key, (aead->alg_key_len + 7) / 8); return 0; } static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb) { struct xfrm_algo *ap; bool redact_secret = xfrm_redact(); struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(ealg)); if (!nla) return -EMSGSIZE; ap = nla_data(nla); strscpy_pad(ap->alg_name, ealg->alg_name, sizeof(ap->alg_name)); ap->alg_key_len = ealg->alg_key_len; if (redact_secret && ealg->alg_key_len) memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8); else memcpy(ap->alg_key, ealg->alg_key, (ealg->alg_key_len + 7) / 8); return 0; } static int copy_to_user_calg(struct xfrm_algo *calg, struct sk_buff *skb) { struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_COMP, sizeof(*calg)); struct xfrm_algo *ap; if (!nla) return -EMSGSIZE; ap = nla_data(nla); strscpy_pad(ap->alg_name, calg->alg_name, sizeof(ap->alg_name)); ap->alg_key_len = 0; return 0; } static int copy_to_user_encap(struct xfrm_encap_tmpl *ep, struct sk_buff *skb) { struct nlattr *nla = nla_reserve(skb, XFRMA_ENCAP, sizeof(*ep)); struct xfrm_encap_tmpl *uep; if (!nla) return -EMSGSIZE; uep = nla_data(nla); memset(uep, 0, sizeof(*uep)); uep->encap_type = ep->encap_type; uep->encap_sport = ep->encap_sport; uep->encap_dport = ep->encap_dport; uep->encap_oa = ep->encap_oa; return 0; } static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m) { int ret = 0; if (m->v | m->m) { ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v); if (!ret) ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m); } return ret; } /* Don't change this without updating xfrm_sa_len! */ static int copy_to_user_state_extra(struct xfrm_state *x, struct xfrm_usersa_info *p, struct sk_buff *skb) { int ret = 0; copy_to_user_state(x, p); if (x->props.extra_flags) { ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, x->props.extra_flags); if (ret) goto out; } if (x->coaddr) { ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); if (ret) goto out; } if (x->lastused) { ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused, XFRMA_PAD); if (ret) goto out; } if (x->aead) { ret = copy_to_user_aead(x->aead, skb); if (ret) goto out; } if (x->aalg) { ret = copy_to_user_auth(x->aalg, skb); if (ret) goto out; } if (x->ealg) { ret = copy_to_user_ealg(x->ealg, skb); if (ret) goto out; } if (x->calg) { ret = copy_to_user_calg(x->calg, skb); if (ret) goto out; } if (x->encap) { ret = copy_to_user_encap(x->encap, skb); if (ret) goto out; } if (x->tfcpad) { ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); if (ret) goto out; } ret = xfrm_mark_put(skb, &x->mark); if (ret) goto out; ret = xfrm_smark_put(skb, &x->props.smark); if (ret) goto out; if (x->replay_esn) ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn); else ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); if (ret) goto out; if(x->xso.dev) ret = copy_user_offload(&x->xso, skb); if (ret) goto out; if (x->if_id) { ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id); if (ret) goto out; } if (x->security) { ret = copy_sec_ctx(x->security, skb); if (ret) goto out; } if (x->mapping_maxage) ret = nla_put_u32(skb, XFRMA_MTIMER_THRESH, x->mapping_maxage); out: return ret; } static int dump_one_state(struct xfrm_state *x, int count, void *ptr) { struct xfrm_dump_info *sp = ptr; struct sk_buff *in_skb = sp->in_skb; struct sk_buff *skb = sp->out_skb; struct xfrm_translator *xtr; struct xfrm_usersa_info *p; struct nlmsghdr *nlh; int err; nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); if (nlh == NULL) return -EMSGSIZE; p = nlmsg_data(nlh); err = copy_to_user_state_extra(x, p, skb); if (err) { nlmsg_cancel(skb, nlh); return err; } nlmsg_end(skb, nlh); xtr = xfrm_get_translator(); if (xtr) { err = xtr->alloc_compat(skb, nlh); xfrm_put_translator(xtr); if (err) { nlmsg_cancel(skb, nlh); return err; } } return 0; } static int xfrm_dump_sa_done(struct netlink_callback *cb) { struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; struct sock *sk = cb->skb->sk; struct net *net = sock_net(sk); if (cb->args[0]) xfrm_state_walk_done(walk, net); return 0; } static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; struct xfrm_dump_info info; BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > sizeof(cb->args) - sizeof(cb->args[0])); info.in_skb = cb->skb; info.out_skb = skb; info.nlmsg_seq = cb->nlh->nlmsg_seq; info.nlmsg_flags = NLM_F_MULTI; if (!cb->args[0]) { struct nlattr *attrs[XFRMA_MAX+1]; struct xfrm_address_filter *filter = NULL; u8 proto = 0; int err; err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy, cb->extack); if (err < 0) return err; if (attrs[XFRMA_ADDRESS_FILTER]) { filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), sizeof(*filter), GFP_KERNEL); if (filter == NULL) return -ENOMEM; /* see addr_match(), (prefix length >> 5) << 2 * will be used to compare xfrm_address_t */ if (filter->splen > (sizeof(xfrm_address_t) << 3) || filter->dplen > (sizeof(xfrm_address_t) << 3)) { kfree(filter); return -EINVAL; } } if (attrs[XFRMA_PROTO]) proto = nla_get_u8(attrs[XFRMA_PROTO]); xfrm_state_walk_init(walk, proto, filter); cb->args[0] = 1; } (void) xfrm_state_walk(net, walk, dump_one_state, &info); return skb->len; } static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, struct xfrm_state *x, u32 seq) { struct xfrm_dump_info info; struct sk_buff *skb; int err; skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!skb) return ERR_PTR(-ENOMEM); info.in_skb = in_skb; info.out_skb = skb; info.nlmsg_seq = seq; info.nlmsg_flags = 0; err = dump_one_state(x, 0, &info); if (err) { kfree_skb(skb); return ERR_PTR(err); } return skb; } /* A wrapper for nlmsg_multicast() checking that nlsk is still available. * Must be called with RCU read lock. */ static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, u32 pid, unsigned int group) { struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); struct xfrm_translator *xtr; if (!nlsk) { kfree_skb(skb); return -EPIPE; } xtr = xfrm_get_translator(); if (xtr) { int err = xtr->alloc_compat(skb, nlmsg_hdr(skb)); xfrm_put_translator(xtr); if (err) { kfree_skb(skb); return err; } } return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); } static inline unsigned int xfrm_spdinfo_msgsize(void) { return NLMSG_ALIGN(4) + nla_total_size(sizeof(struct xfrmu_spdinfo)) + nla_total_size(sizeof(struct xfrmu_spdhinfo)) + nla_total_size(sizeof(struct xfrmu_spdhthresh)) + nla_total_size(sizeof(struct xfrmu_spdhthresh)); } static int build_spdinfo(struct sk_buff *skb, struct net *net, u32 portid, u32 seq, u32 flags) { struct xfrmk_spdinfo si; struct xfrmu_spdinfo spc; struct xfrmu_spdhinfo sph; struct xfrmu_spdhthresh spt4, spt6; struct nlmsghdr *nlh; int err; u32 *f; unsigned lseq; nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); if (nlh == NULL) /* shouldn't really happen ... */ return -EMSGSIZE; f = nlmsg_data(nlh); *f = flags; xfrm_spd_getinfo(net, &si); spc.incnt = si.incnt; spc.outcnt = si.outcnt; spc.fwdcnt = si.fwdcnt; spc.inscnt = si.inscnt; spc.outscnt = si.outscnt; spc.fwdscnt = si.fwdscnt; sph.spdhcnt = si.spdhcnt; sph.spdhmcnt = si.spdhmcnt; do { lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); spt4.lbits = net->xfrm.policy_hthresh.lbits4; spt4.rbits = net->xfrm.policy_hthresh.rbits4; spt6.lbits = net->xfrm.policy_hthresh.lbits6; spt6.rbits = net->xfrm.policy_hthresh.rbits6; } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); if (!err) err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); if (!err) err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); if (!err) err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); if (err) { nlmsg_cancel(skb, nlh); return err; } nlmsg_end(skb, nlh); return 0; } static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrmu_spdhthresh *thresh4 = NULL; struct xfrmu_spdhthresh *thresh6 = NULL; /* selector prefixlen thresholds to hash policies */ if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; if (nla_len(rta) < sizeof(*thresh4)) { NL_SET_ERR_MSG(extack, "Invalid SPD_IPV4_HTHRESH attribute length"); return -EINVAL; } thresh4 = nla_data(rta); if (thresh4->lbits > 32 || thresh4->rbits > 32) { NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 32 for IPv4)"); return -EINVAL; } } if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; if (nla_len(rta) < sizeof(*thresh6)) { NL_SET_ERR_MSG(extack, "Invalid SPD_IPV6_HTHRESH attribute length"); return -EINVAL; } thresh6 = nla_data(rta); if (thresh6->lbits > 128 || thresh6->rbits > 128) { NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 128 for IPv6)"); return -EINVAL; } } if (thresh4 || thresh6) { write_seqlock(&net->xfrm.policy_hthresh.lock); if (thresh4) { net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; } if (thresh6) { net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; } write_sequnlock(&net->xfrm.policy_hthresh.lock); xfrm_policy_hash_rebuild(net); } return 0; } static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct sk_buff *r_skb; u32 *flags = nlmsg_data(nlh); u32 sportid = NETLINK_CB(skb).portid; u32 seq = nlh->nlmsg_seq; int err; r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); if (r_skb == NULL) return -ENOMEM; err = build_spdinfo(r_skb, net, sportid, seq, *flags); BUG_ON(err < 0); return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); } static inline unsigned int xfrm_sadinfo_msgsize(void) { return NLMSG_ALIGN(4) + nla_total_size(sizeof(struct xfrmu_sadhinfo)) + nla_total_size(4); /* XFRMA_SAD_CNT */ } static int build_sadinfo(struct sk_buff *skb, struct net *net, u32 portid, u32 seq, u32 flags) { struct xfrmk_sadinfo si; struct xfrmu_sadhinfo sh; struct nlmsghdr *nlh; int err; u32 *f; nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); if (nlh == NULL) /* shouldn't really happen ... */ return -EMSGSIZE; f = nlmsg_data(nlh); *f = flags; xfrm_sad_getinfo(net, &si); sh.sadhmcnt = si.sadhmcnt; sh.sadhcnt = si.sadhcnt; err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); if (!err) err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); if (err) { nlmsg_cancel(skb, nlh); return err; } nlmsg_end(skb, nlh); return 0; } static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct sk_buff *r_skb; u32 *flags = nlmsg_data(nlh); u32 sportid = NETLINK_CB(skb).portid; u32 seq = nlh->nlmsg_seq; int err; r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); if (r_skb == NULL) return -ENOMEM; err = build_sadinfo(r_skb, net, sportid, seq, *flags); BUG_ON(err < 0); return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); } static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_usersa_id *p = nlmsg_data(nlh); struct xfrm_state *x; struct sk_buff *resp_skb; int err = -ESRCH; x = xfrm_user_state_lookup(net, p, attrs, &err); if (x == NULL) goto out_noput; resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); } xfrm_state_put(x); out_noput: return err; } static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct xfrm_userspi_info *p; struct xfrm_translator *xtr; struct sk_buff *resp_skb; xfrm_address_t *daddr; int family; int err; u32 mark; struct xfrm_mark m; u32 if_id = 0; p = nlmsg_data(nlh); err = verify_spi_info(p->info.id.proto, p->min, p->max, extack); if (err) goto out_noput; family = p->info.family; daddr = &p->info.id.daddr; x = NULL; mark = xfrm_mark_get(attrs, &m); if (attrs[XFRMA_IF_ID]) if_id = nla_get_u32(attrs[XFRMA_IF_ID]); if (p->info.seq) { x = xfrm_find_acq_byseq(net, mark, p->info.seq); if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { xfrm_state_put(x); x = NULL; } } if (!x) x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, if_id, p->info.id.proto, daddr, &p->info.saddr, 1, family); err = -ENOENT; if (!x) { NL_SET_ERR_MSG(extack, "Target ACQUIRE not found"); goto out_noput; } err = xfrm_alloc_spi(x, p->min, p->max, extack); if (err) goto out; resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); goto out; } xtr = xfrm_get_translator(); if (xtr) { err = xtr->alloc_compat(skb, nlmsg_hdr(skb)); xfrm_put_translator(xtr); if (err) { kfree_skb(resp_skb); goto out; } } err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); out: xfrm_state_put(x); out_noput: return err; } static int verify_policy_dir(u8 dir, struct netlink_ext_ack *extack) { switch (dir) { case XFRM_POLICY_IN: case XFRM_POLICY_OUT: case XFRM_POLICY_FWD: break; default: NL_SET_ERR_MSG(extack, "Invalid policy direction"); return -EINVAL; } return 0; } static int verify_policy_type(u8 type, struct netlink_ext_ack *extack) { switch (type) { case XFRM_POLICY_TYPE_MAIN: #ifdef CONFIG_XFRM_SUB_POLICY case XFRM_POLICY_TYPE_SUB: #endif break; default: NL_SET_ERR_MSG(extack, "Invalid policy type"); return -EINVAL; } return 0; } static int verify_newpolicy_info(struct xfrm_userpolicy_info *p, struct netlink_ext_ack *extack) { int ret; switch (p->share) { case XFRM_SHARE_ANY: case XFRM_SHARE_SESSION: case XFRM_SHARE_USER: case XFRM_SHARE_UNIQUE: break; default: NL_SET_ERR_MSG(extack, "Invalid policy share"); return -EINVAL; } switch (p->action) { case XFRM_POLICY_ALLOW: case XFRM_POLICY_BLOCK: break; default: NL_SET_ERR_MSG(extack, "Invalid policy action"); return -EINVAL; } switch (p->sel.family) { case AF_INET: if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) { NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)"); return -EINVAL; } break; case AF_INET6: #if IS_ENABLED(CONFIG_IPV6) if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) { NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)"); return -EINVAL; } break; #else NL_SET_ERR_MSG(extack, "IPv6 support disabled"); return -EAFNOSUPPORT; #endif default: NL_SET_ERR_MSG(extack, "Invalid selector family"); return -EINVAL; } ret = verify_policy_dir(p->dir, extack); if (ret) return ret; if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) { NL_SET_ERR_MSG(extack, "Policy index doesn't match direction"); return -EINVAL; } return 0; } static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_user_sec_ctx *uctx; if (!rt) return 0; uctx = nla_data(rt); return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); } static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, int nr) { int i; xp->xfrm_nr = nr; for (i = 0; i < nr; i++, ut++) { struct xfrm_tmpl *t = &xp->xfrm_vec[i]; memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); memcpy(&t->saddr, &ut->saddr, sizeof(xfrm_address_t)); t->reqid = ut->reqid; t->mode = ut->mode; t->share = ut->share; t->optional = ut->optional; t->aalgos = ut->aalgos; t->ealgos = ut->ealgos; t->calgos = ut->calgos; /* If all masks are ~0, then we allow all algorithms. */ t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); t->encap_family = ut->family; } } static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family, int dir, struct netlink_ext_ack *extack) { u16 prev_family; int i; if (nr > XFRM_MAX_DEPTH) { NL_SET_ERR_MSG(extack, "Template count must be <= XFRM_MAX_DEPTH (" __stringify(XFRM_MAX_DEPTH) ")"); return -EINVAL; } prev_family = family; for (i = 0; i < nr; i++) { /* We never validated the ut->family value, so many * applications simply leave it at zero. The check was * never made and ut->family was ignored because all * templates could be assumed to have the same family as * the policy itself. Now that we will have ipv4-in-ipv6 * and ipv6-in-ipv4 tunnels, this is no longer true. */ if (!ut[i].family) ut[i].family = family; switch (ut[i].mode) { case XFRM_MODE_TUNNEL: case XFRM_MODE_BEET: if (ut[i].optional && dir == XFRM_POLICY_OUT) { NL_SET_ERR_MSG(extack, "Mode in optional template not allowed in outbound policy"); return -EINVAL; } break; default: if (ut[i].family != prev_family) { NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change"); return -EINVAL; } break; } if (ut[i].mode >= XFRM_MODE_MAX) { NL_SET_ERR_MSG(extack, "Mode in template must be < XFRM_MODE_MAX (" __stringify(XFRM_MODE_MAX) ")"); return -EINVAL; } prev_family = ut[i].family; switch (ut[i].family) { case AF_INET: break; #if IS_ENABLED(CONFIG_IPV6) case AF_INET6: break; #endif default: NL_SET_ERR_MSG(extack, "Invalid family in template"); return -EINVAL; } if (!xfrm_id_proto_valid(ut[i].id.proto)) { NL_SET_ERR_MSG(extack, "Invalid XFRM protocol in template"); return -EINVAL; } } return 0; } static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs, int dir, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[XFRMA_TMPL]; if (!rt) { pol->xfrm_nr = 0; } else { struct xfrm_user_tmpl *utmpl = nla_data(rt); int nr = nla_len(rt) / sizeof(*utmpl); int err; err = validate_tmpl(nr, utmpl, pol->family, dir, extack); if (err) return err; copy_templates(pol, utmpl, nr); } return 0; } static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; struct xfrm_userpolicy_type *upt; u8 type = XFRM_POLICY_TYPE_MAIN; int err; if (rt) { upt = nla_data(rt); type = upt->type; } err = verify_policy_type(type, extack); if (err) return err; *tp = type; return 0; } static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) { xp->priority = p->priority; xp->index = p->index; memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); xp->action = p->action; xp->flags = p->flags; xp->family = p->sel.family; /* XXX xp->share = p->share; */ } static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) { memset(p, 0, sizeof(*p)); memcpy(&p->sel, &xp->selector, sizeof(p->sel)); memcpy(&p->lft, &xp->lft, sizeof(p->lft)); memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); p->priority = xp->priority; p->index = xp->index; p->sel.family = xp->family; p->dir = dir; p->action = xp->action; p->flags = xp->flags; p->share = XFRM_SHARE_ANY; /* XXX xp->share */ } static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp, struct netlink_ext_ack *extack) { struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); int err; if (!xp) { *errp = -ENOMEM; return NULL; } copy_from_user_policy(xp, p); err = copy_from_user_policy_type(&xp->type, attrs, extack); if (err) goto error; if (!(err = copy_from_user_tmpl(xp, attrs, p->dir, extack))) err = copy_from_user_sec_ctx(xp, attrs); if (err) goto error; xfrm_mark_get(attrs, &xp->mark); if (attrs[XFRMA_IF_ID]) xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); /* configure the hardware if offload is requested */ if (attrs[XFRMA_OFFLOAD_DEV]) { err = xfrm_dev_policy_add(net, xp, nla_data(attrs[XFRMA_OFFLOAD_DEV]), p->dir, extack); if (err) goto error; } return xp; error: *errp = err; xp->walk.dead = 1; xfrm_policy_destroy(xp); return NULL; } static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_userpolicy_info *p = nlmsg_data(nlh); struct xfrm_policy *xp; struct km_event c; int err; int excl; err = verify_newpolicy_info(p, extack); if (err) return err; err = verify_sec_ctx_len(attrs, extack); if (err) return err; xp = xfrm_policy_construct(net, p, attrs, &err, extack); if (!xp) return err; /* shouldn't excl be based on nlh flags?? * Aha! this is anti-netlink really i.e more pfkey derived * in netlink excl is a flag and you wouldn't need * a type XFRM_MSG_UPDPOLICY - JHS */ excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; err = xfrm_policy_insert(p->dir, xp, excl); xfrm_audit_policy_add(xp, err ? 0 : 1, true); if (err) { xfrm_dev_policy_delete(xp); xfrm_dev_policy_free(xp); security_xfrm_policy_free(xp->security); kfree(xp); return err; } c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; km_policy_notify(xp, p->dir, &c); xfrm_pol_put(xp); return 0; } static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) { struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; int i; if (xp->xfrm_nr == 0) return 0; if (xp->xfrm_nr > XFRM_MAX_DEPTH) return -ENOBUFS; for (i = 0; i < xp->xfrm_nr; i++) { struct xfrm_user_tmpl *up = &vec[i]; struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; memset(up, 0, sizeof(*up)); memcpy(&up->id, &kp->id, sizeof(up->id)); up->family = kp->encap_family; memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); up->reqid = kp->reqid; up->mode = kp->mode; up->share = kp->share; up->optional = kp->optional; up->aalgos = kp->aalgos; up->ealgos = kp->ealgos; up->calgos = kp->calgos; } return nla_put(skb, XFRMA_TMPL, sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); } static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) { if (x->security) { return copy_sec_ctx(x->security, skb); } return 0; } static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) { if (xp->security) return copy_sec_ctx(xp->security, skb); return 0; } static inline unsigned int userpolicy_type_attrsize(void) { #ifdef CONFIG_XFRM_SUB_POLICY return nla_total_size(sizeof(struct xfrm_userpolicy_type)); #else return 0; #endif } #ifdef CONFIG_XFRM_SUB_POLICY static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) { struct xfrm_userpolicy_type upt; /* Sadly there are two holes in struct xfrm_userpolicy_type */ memset(&upt, 0, sizeof(upt)); upt.type = type; return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); } #else static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) { return 0; } #endif static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) { struct xfrm_dump_info *sp = ptr; struct xfrm_userpolicy_info *p; struct sk_buff *in_skb = sp->in_skb; struct sk_buff *skb = sp->out_skb; struct xfrm_translator *xtr; struct nlmsghdr *nlh; int err; nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); if (nlh == NULL) return -EMSGSIZE; p = nlmsg_data(nlh); copy_to_user_policy(xp, p, dir); err = copy_to_user_tmpl(xp, skb); if (!err) err = copy_to_user_sec_ctx(xp, skb); if (!err) err = copy_to_user_policy_type(xp->type, skb); if (!err) err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); if (!err && xp->xdo.dev) err = copy_user_offload(&xp->xdo, skb); if (err) { nlmsg_cancel(skb, nlh); return err; } nlmsg_end(skb, nlh); xtr = xfrm_get_translator(); if (xtr) { err = xtr->alloc_compat(skb, nlh); xfrm_put_translator(xtr); if (err) { nlmsg_cancel(skb, nlh); return err; } } return 0; } static int xfrm_dump_policy_done(struct netlink_callback *cb) { struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; struct net *net = sock_net(cb->skb->sk); xfrm_policy_walk_done(walk, net); return 0; } static int xfrm_dump_policy_start(struct netlink_callback *cb) { struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args)); xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); return 0; } static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; struct xfrm_dump_info info; info.in_skb = cb->skb; info.out_skb = skb; info.nlmsg_seq = cb->nlh->nlmsg_seq; info.nlmsg_flags = NLM_F_MULTI; (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); return skb->len; } static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, struct xfrm_policy *xp, int dir, u32 seq) { struct xfrm_dump_info info; struct sk_buff *skb; int err; skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return ERR_PTR(-ENOMEM); info.in_skb = in_skb; info.out_skb = skb; info.nlmsg_seq = seq; info.nlmsg_flags = 0; err = dump_one_policy(xp, dir, 0, &info); if (err) { kfree_skb(skb); return ERR_PTR(err); } return skb; } static int xfrm_notify_userpolicy(struct net *net) { struct xfrm_userpolicy_default *up; int len = NLMSG_ALIGN(sizeof(*up)); struct nlmsghdr *nlh; struct sk_buff *skb; int err; skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0); if (nlh == NULL) { kfree_skb(skb); return -EMSGSIZE; } up = nlmsg_data(nlh); up->in = net->xfrm.policy_default[XFRM_POLICY_IN]; up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD]; up->out = net->xfrm.policy_default[XFRM_POLICY_OUT]; nlmsg_end(skb, nlh); rcu_read_lock(); err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); rcu_read_unlock(); return err; } static bool xfrm_userpolicy_is_valid(__u8 policy) { return policy == XFRM_USERPOLICY_BLOCK || policy == XFRM_USERPOLICY_ACCEPT; } static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_userpolicy_default *up = nlmsg_data(nlh); if (xfrm_userpolicy_is_valid(up->in)) net->xfrm.policy_default[XFRM_POLICY_IN] = up->in; if (xfrm_userpolicy_is_valid(up->fwd)) net->xfrm.policy_default[XFRM_POLICY_FWD] = up->fwd; if (xfrm_userpolicy_is_valid(up->out)) net->xfrm.policy_default[XFRM_POLICY_OUT] = up->out; rt_genid_bump_all(net); xfrm_notify_userpolicy(net); return 0; } static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct sk_buff *r_skb; struct nlmsghdr *r_nlh; struct net *net = sock_net(skb->sk); struct xfrm_userpolicy_default *r_up; int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default)); u32 portid = NETLINK_CB(skb).portid; u32 seq = nlh->nlmsg_seq; r_skb = nlmsg_new(len, GFP_ATOMIC); if (!r_skb) return -ENOMEM; r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0); if (!r_nlh) { kfree_skb(r_skb); return -EMSGSIZE; } r_up = nlmsg_data(r_nlh); r_up->in = net->xfrm.policy_default[XFRM_POLICY_IN]; r_up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD]; r_up->out = net->xfrm.policy_default[XFRM_POLICY_OUT]; nlmsg_end(r_skb, r_nlh); return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid); } static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_userpolicy_id *p; u8 type = XFRM_POLICY_TYPE_MAIN; int err; struct km_event c; int delete; struct xfrm_mark m; u32 if_id = 0; p = nlmsg_data(nlh); delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; err = copy_from_user_policy_type(&type, attrs, extack); if (err) return err; err = verify_policy_dir(p->dir, extack); if (err) return err; if (attrs[XFRMA_IF_ID]) if_id = nla_get_u32(attrs[XFRMA_IF_ID]); xfrm_mark_get(attrs, &m); if (p->index) xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index, delete, &err); else { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_sec_ctx *ctx; err = verify_sec_ctx_len(attrs, extack); if (err) return err; ctx = NULL; if (rt) { struct xfrm_user_sec_ctx *uctx = nla_data(rt); err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); if (err) return err; } xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir, &p->sel, ctx, delete, &err); security_xfrm_policy_free(ctx); } if (xp == NULL) return -ENOENT; if (!delete) { struct sk_buff *resp_skb; resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); } } else { xfrm_dev_policy_delete(xp); xfrm_audit_policy_delete(xp, err ? 0 : 1, true); if (err != 0) goto out; c.data.byid = p->index; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; km_policy_notify(xp, p->dir, &c); } out: xfrm_pol_put(xp); return err; } static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct km_event c; struct xfrm_usersa_flush *p = nlmsg_data(nlh); int err; err = xfrm_state_flush(net, p->proto, true, false); if (err) { if (err == -ESRCH) /* empty table */ return 0; return err; } c.data.proto = p->proto; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; c.net = net; km_state_notify(NULL, &c); return 0; } static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x) { unsigned int replay_size = x->replay_esn ? xfrm_replay_state_esn_len(x->replay_esn) : sizeof(struct xfrm_replay_state); return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) + nla_total_size(replay_size) + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur)) + nla_total_size(sizeof(struct xfrm_mark)) + nla_total_size(4) /* XFRM_AE_RTHR */ + nla_total_size(4); /* XFRM_AE_ETHR */ } static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) { struct xfrm_aevent_id *id; struct nlmsghdr *nlh; int err; nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); if (nlh == NULL) return -EMSGSIZE; id = nlmsg_data(nlh); memset(&id->sa_id, 0, sizeof(id->sa_id)); memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); id->sa_id.spi = x->id.spi; id->sa_id.family = x->props.family; id->sa_id.proto = x->id.proto; memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); id->reqid = x->props.reqid; id->flags = c->data.aevent; if (x->replay_esn) { err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn); } else { err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); } if (err) goto out_cancel; err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft, XFRMA_PAD); if (err) goto out_cancel; if (id->flags & XFRM_AE_RTHR) { err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); if (err) goto out_cancel; } if (id->flags & XFRM_AE_ETHR) { err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, x->replay_maxage * 10 / HZ); if (err) goto out_cancel; } err = xfrm_mark_put(skb, &x->mark); if (err) goto out_cancel; err = xfrm_if_id_put(skb, x->if_id); if (err) goto out_cancel; nlmsg_end(skb, nlh); return 0; out_cancel: nlmsg_cancel(skb, nlh); return err; } static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct sk_buff *r_skb; int err; struct km_event c; u32 mark; struct xfrm_mark m; struct xfrm_aevent_id *p = nlmsg_data(nlh); struct xfrm_usersa_id *id = &p->sa_id; mark = xfrm_mark_get(attrs, &m); x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); if (x == NULL) return -ESRCH; r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); if (r_skb == NULL) { xfrm_state_put(x); return -ENOMEM; } /* * XXX: is this lock really needed - none of the other * gets lock (the concern is things getting updated * while we are still reading) - jhs */ spin_lock_bh(&x->lock); c.data.aevent = p->flags; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; err = build_aevent(r_skb, x, &c); BUG_ON(err < 0); err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); spin_unlock_bh(&x->lock); xfrm_state_put(x); return err; } static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct km_event c; int err = -EINVAL; u32 mark = 0; struct xfrm_mark m; struct xfrm_aevent_id *p = nlmsg_data(nlh); struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; if (!lt && !rp && !re && !et && !rt) { NL_SET_ERR_MSG(extack, "Missing required attribute for AE"); return err; } /* pedantic mode - thou shalt sayeth replaceth */ if (!(nlh->nlmsg_flags & NLM_F_REPLACE)) { NL_SET_ERR_MSG(extack, "NLM_F_REPLACE flag is required"); return err; } mark = xfrm_mark_get(attrs, &m); x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); if (x == NULL) return -ESRCH; if (x->km.state != XFRM_STATE_VALID) { NL_SET_ERR_MSG(extack, "SA must be in VALID state"); goto out; } err = xfrm_replay_verify_len(x->replay_esn, re, extack); if (err) goto out; spin_lock_bh(&x->lock); xfrm_update_ae_params(x, attrs, 1); spin_unlock_bh(&x->lock); c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; c.data.aevent = XFRM_AE_CU; km_state_notify(x, &c); err = 0; out: xfrm_state_put(x); return err; } static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct km_event c; u8 type = XFRM_POLICY_TYPE_MAIN; int err; err = copy_from_user_policy_type(&type, attrs, extack); if (err) return err; err = xfrm_policy_flush(net, type, true); if (err) { if (err == -ESRCH) /* empty table */ return 0; return err; } c.data.type = type; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; c.portid = nlh->nlmsg_pid; c.net = net; km_policy_notify(NULL, 0, &c); return 0; } static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_user_polexpire *up = nlmsg_data(nlh); struct xfrm_userpolicy_info *p = &up->pol; u8 type = XFRM_POLICY_TYPE_MAIN; int err = -ENOENT; struct xfrm_mark m; u32 if_id = 0; err = copy_from_user_policy_type(&type, attrs, extack); if (err) return err; err = verify_policy_dir(p->dir, extack); if (err) return err; if (attrs[XFRMA_IF_ID]) if_id = nla_get_u32(attrs[XFRMA_IF_ID]); xfrm_mark_get(attrs, &m); if (p->index) xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index, 0, &err); else { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_sec_ctx *ctx; err = verify_sec_ctx_len(attrs, extack); if (err) return err; ctx = NULL; if (rt) { struct xfrm_user_sec_ctx *uctx = nla_data(rt); err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); if (err) return err; } xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir, &p->sel, ctx, 0, &err); security_xfrm_policy_free(ctx); } if (xp == NULL) return -ENOENT; if (unlikely(xp->walk.dead)) goto out; err = 0; if (up->hard) { xfrm_policy_delete(xp, p->dir); xfrm_audit_policy_delete(xp, 1, true); } km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); out: xfrm_pol_put(xp); return err; } static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_state *x; int err; struct xfrm_user_expire *ue = nlmsg_data(nlh); struct xfrm_usersa_info *p = &ue->state; struct xfrm_mark m; u32 mark = xfrm_mark_get(attrs, &m); x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); err = -ENOENT; if (x == NULL) return err; spin_lock_bh(&x->lock); err = -EINVAL; if (x->km.state != XFRM_STATE_VALID) { NL_SET_ERR_MSG(extack, "SA must be in VALID state"); goto out; } km_state_expired(x, ue->hard, nlh->nlmsg_pid); if (ue->hard) { __xfrm_state_delete(x); xfrm_audit_state_delete(x, 1, true); } err = 0; out: spin_unlock_bh(&x->lock); xfrm_state_put(x); return err; } static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_user_tmpl *ut; int i; struct nlattr *rt = attrs[XFRMA_TMPL]; struct xfrm_mark mark; struct xfrm_user_acquire *ua = nlmsg_data(nlh); struct xfrm_state *x = xfrm_state_alloc(net); int err = -ENOMEM; if (!x) goto nomem; xfrm_mark_get(attrs, &mark); err = verify_newpolicy_info(&ua->policy, extack); if (err) goto free_state; err = verify_sec_ctx_len(attrs, extack); if (err) goto free_state; /* build an XP */ xp = xfrm_policy_construct(net, &ua->policy, attrs, &err, extack); if (!xp) goto free_state; memcpy(&x->id, &ua->id, sizeof(ua->id)); memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); xp->mark.m = x->mark.m = mark.m; xp->mark.v = x->mark.v = mark.v; ut = nla_data(rt); /* extract the templates and for each call km_key */ for (i = 0; i < xp->xfrm_nr; i++, ut++) { struct xfrm_tmpl *t = &xp->xfrm_vec[i]; memcpy(&x->id, &t->id, sizeof(x->id)); x->props.mode = t->mode; x->props.reqid = t->reqid; x->props.family = ut->family; t->aalgos = ua->aalgos; t->ealgos = ua->ealgos; t->calgos = ua->calgos; err = km_query(x, t, xp); } xfrm_state_free(x); kfree(xp); return 0; free_state: xfrm_state_free(x); nomem: return err; } #ifdef CONFIG_XFRM_MIGRATE static int copy_from_user_migrate(struct xfrm_migrate *ma, struct xfrm_kmaddress *k, struct nlattr **attrs, int *num, struct netlink_ext_ack *extack) { struct nlattr *rt = attrs[XFRMA_MIGRATE]; struct xfrm_user_migrate *um; int i, num_migrate; if (k != NULL) { struct xfrm_user_kmaddress *uk; uk = nla_data(attrs[XFRMA_KMADDRESS]); memcpy(&k->local, &uk->local, sizeof(k->local)); memcpy(&k->remote, &uk->remote, sizeof(k->remote)); k->family = uk->family; k->reserved = uk->reserved; } um = nla_data(rt); num_migrate = nla_len(rt) / sizeof(*um); if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) { NL_SET_ERR_MSG(extack, "Invalid number of SAs to migrate, must be 0 < num <= XFRM_MAX_DEPTH (6)"); return -EINVAL; } for (i = 0; i < num_migrate; i++, um++, ma++) { memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); ma->proto = um->proto; ma->mode = um->mode; ma->reqid = um->reqid; ma->old_family = um->old_family; ma->new_family = um->new_family; } *num = i; return 0; } static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); struct xfrm_migrate m[XFRM_MAX_DEPTH]; struct xfrm_kmaddress km, *kmp; u8 type; int err; int n = 0; struct net *net = sock_net(skb->sk); struct xfrm_encap_tmpl *encap = NULL; u32 if_id = 0; if (!attrs[XFRMA_MIGRATE]) { NL_SET_ERR_MSG(extack, "Missing required MIGRATE attribute"); return -EINVAL; } kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; err = copy_from_user_policy_type(&type, attrs, extack); if (err) return err; err = copy_from_user_migrate(m, kmp, attrs, &n, extack); if (err) return err; if (!n) return 0; if (attrs[XFRMA_ENCAP]) { encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), sizeof(*encap), GFP_KERNEL); if (!encap) return -ENOMEM; } if (attrs[XFRMA_IF_ID]) if_id = nla_get_u32(attrs[XFRMA_IF_ID]); err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap, if_id, extack); kfree(encap); return err; } #else static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs, struct netlink_ext_ack *extack) { return -ENOPROTOOPT; } #endif #ifdef CONFIG_XFRM_MIGRATE static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) { struct xfrm_user_migrate um; memset(&um, 0, sizeof(um)); um.proto = m->proto; um.mode = m->mode; um.reqid = m->reqid; um.old_family = m->old_family; memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); um.new_family = m->new_family; memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); } static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) { struct xfrm_user_kmaddress uk; memset(&uk, 0, sizeof(uk)); uk.family = k->family; uk.reserved = k->reserved; memcpy(&uk.local, &k->local, sizeof(uk.local)); memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); } static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma, int with_encp) { return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0) + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) + userpolicy_type_attrsize(); } static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, int num_migrate, const struct xfrm_kmaddress *k, const struct xfrm_selector *sel, const struct xfrm_encap_tmpl *encap, u8 dir, u8 type) { const struct xfrm_migrate *mp; struct xfrm_userpolicy_id *pol_id; struct nlmsghdr *nlh; int i, err; nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); if (nlh == NULL) return -EMSGSIZE; pol_id = nlmsg_data(nlh); /* copy data from selector, dir, and type to the pol_id */ memset(pol_id, 0, sizeof(*pol_id)); memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); pol_id->dir = dir; if (k != NULL) { err = copy_to_user_kmaddress(k, skb); if (err) goto out_cancel; } if (encap) { err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap); if (err) goto out_cancel; } err = copy_to_user_policy_type(type, skb); if (err) goto out_cancel; for (i = 0, mp = m ; i < num_migrate; i++, mp++) { err = copy_to_user_migrate(mp, skb); if (err) goto out_cancel; } nlmsg_end(skb, nlh); return 0; out_cancel: nlmsg_cancel(skb, nlh); return err; } static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, const struct xfrm_kmaddress *k, const struct xfrm_encap_tmpl *encap) { struct net *net = &init_net; struct sk_buff *skb; int err; skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; /* build migrate */ err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type); BUG_ON(err < 0); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); } #else static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, const struct xfrm_kmaddress *k, const struct xfrm_encap_tmpl *encap) { return -ENOPROTOOPT; } #endif #define XMSGSIZE(type) sizeof(struct type) const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default), [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default), }; EXPORT_SYMBOL_GPL(xfrm_msg_min); #undef XMSGSIZE const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, [XFRMA_LASTUSED] = { .type = NLA_U64}, [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) }, [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, [XFRMA_TFCPAD] = { .type = NLA_U32 }, [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, [XFRMA_PROTO] = { .type = NLA_U8 }, [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) }, [XFRMA_SET_MARK] = { .type = NLA_U32 }, [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 }, [XFRMA_IF_ID] = { .type = NLA_U32 }, [XFRMA_MTIMER_THRESH] = { .type = NLA_U32 }, }; EXPORT_SYMBOL_GPL(xfrma_policy); static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, }; static const struct xfrm_link { int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **, struct netlink_ext_ack *); int (*start)(struct netlink_callback *); int (*dump)(struct sk_buff *, struct netlink_callback *); int (*done)(struct netlink_callback *); const struct nla_policy *nla_pol; int nla_max; } xfrm_dispatch[XFRM_NR_MSGTYPES] = { [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, .dump = xfrm_dump_sa, .done = xfrm_dump_sa_done }, [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, .start = xfrm_dump_policy_start, .dump = xfrm_dump_policy, .done = xfrm_dump_policy_done }, [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, .nla_pol = xfrma_spd_policy, .nla_max = XFRMA_SPD_MAX }, [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default }, [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default }, }; static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { struct net *net = sock_net(skb->sk); struct nlattr *attrs[XFRMA_MAX+1]; const struct xfrm_link *link; struct nlmsghdr *nlh64 = NULL; int type, err; type = nlh->nlmsg_type; if (type > XFRM_MSG_MAX) return -EINVAL; type -= XFRM_MSG_BASE; link = &xfrm_dispatch[type]; /* All operations require privileges, even GET */ if (!netlink_net_capable(skb, CAP_NET_ADMIN)) return -EPERM; if (in_compat_syscall()) { struct xfrm_translator *xtr = xfrm_get_translator(); if (!xtr) return -EOPNOTSUPP; nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max, link->nla_pol, extack); xfrm_put_translator(xtr); if (IS_ERR(nlh64)) return PTR_ERR(nlh64); if (nlh64) nlh = nlh64; } if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && (nlh->nlmsg_flags & NLM_F_DUMP)) { struct netlink_dump_control c = { .start = link->start, .dump = link->dump, .done = link->done, }; if (link->dump == NULL) { err = -EINVAL; goto err; } err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); goto err; } err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs, link->nla_max ? : XFRMA_MAX, link->nla_pol ? : xfrma_policy, extack); if (err < 0) goto err; if (link->doit == NULL) { err = -EINVAL; goto err; } err = link->doit(skb, nlh, attrs, extack); /* We need to free skb allocated in xfrm_alloc_compat() before * returning from this function, because consume_skb() won't take * care of frag_list since netlink destructor sets * sbk->head to NULL. (see netlink_skb_destructor()) */ if (skb_has_frag_list(skb)) { kfree_skb(skb_shinfo(skb)->frag_list); skb_shinfo(skb)->frag_list = NULL; } err: kvfree(nlh64); return err; } static void xfrm_netlink_rcv(struct sk_buff *skb) { struct net *net = sock_net(skb->sk); mutex_lock(&net->xfrm.xfrm_cfg_mutex); netlink_rcv_skb(skb, &xfrm_user_rcv_msg); mutex_unlock(&net->xfrm.xfrm_cfg_mutex); } static inline unsigned int xfrm_expire_msgsize(void) { return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) + nla_total_size(sizeof(struct xfrm_mark)); } static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) { struct xfrm_user_expire *ue; struct nlmsghdr *nlh; int err; nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); if (nlh == NULL) return -EMSGSIZE; ue = nlmsg_data(nlh); copy_to_user_state(x, &ue->state); ue->hard = (c->data.hard != 0) ? 1 : 0; /* clear the padding bytes */ memset_after(ue, 0, hard); err = xfrm_mark_put(skb, &x->mark); if (err) return err; err = xfrm_if_id_put(skb, x->if_id); if (err) return err; nlmsg_end(skb, nlh); return 0; } static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) { struct net *net = xs_net(x); struct sk_buff *skb; skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; if (build_expire(skb, x, c) < 0) { kfree_skb(skb); return -EMSGSIZE; } return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); } static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) { struct net *net = xs_net(x); struct sk_buff *skb; int err; skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; err = build_aevent(skb, x, c); BUG_ON(err < 0); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); } static int xfrm_notify_sa_flush(const struct km_event *c) { struct net *net = c->net; struct xfrm_usersa_flush *p; struct nlmsghdr *nlh; struct sk_buff *skb; int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); if (nlh == NULL) { kfree_skb(skb); return -EMSGSIZE; } p = nlmsg_data(nlh); p->proto = c->data.proto; nlmsg_end(skb, nlh); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); } static inline unsigned int xfrm_sa_len(struct xfrm_state *x) { unsigned int l = 0; if (x->aead) l += nla_total_size(aead_len(x->aead)); if (x->aalg) { l += nla_total_size(sizeof(struct xfrm_algo) + (x->aalg->alg_key_len + 7) / 8); l += nla_total_size(xfrm_alg_auth_len(x->aalg)); } if (x->ealg) l += nla_total_size(xfrm_alg_len(x->ealg)); if (x->calg) l += nla_total_size(sizeof(*x->calg)); if (x->encap) l += nla_total_size(sizeof(*x->encap)); if (x->tfcpad) l += nla_total_size(sizeof(x->tfcpad)); if (x->replay_esn) l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); else l += nla_total_size(sizeof(struct xfrm_replay_state)); if (x->security) l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + x->security->ctx_len); if (x->coaddr) l += nla_total_size(sizeof(*x->coaddr)); if (x->props.extra_flags) l += nla_total_size(sizeof(x->props.extra_flags)); if (x->xso.dev) l += nla_total_size(sizeof(struct xfrm_user_offload)); if (x->props.smark.v | x->props.smark.m) { l += nla_total_size(sizeof(x->props.smark.v)); l += nla_total_size(sizeof(x->props.smark.m)); } if (x->if_id) l += nla_total_size(sizeof(x->if_id)); /* Must count x->lastused as it may become non-zero behind our back. */ l += nla_total_size_64bit(sizeof(u64)); if (x->mapping_maxage) l += nla_total_size(sizeof(x->mapping_maxage)); return l; } static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) { struct net *net = xs_net(x); struct xfrm_usersa_info *p; struct xfrm_usersa_id *id; struct nlmsghdr *nlh; struct sk_buff *skb; unsigned int len = xfrm_sa_len(x); unsigned int headlen; int err; headlen = sizeof(*p); if (c->event == XFRM_MSG_DELSA) { len += nla_total_size(headlen); headlen = sizeof(*id); len += nla_total_size(sizeof(struct xfrm_mark)); } len += NLMSG_ALIGN(headlen); skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); err = -EMSGSIZE; if (nlh == NULL) goto out_free_skb; p = nlmsg_data(nlh); if (c->event == XFRM_MSG_DELSA) { struct nlattr *attr; id = nlmsg_data(nlh); memset(id, 0, sizeof(*id)); memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); id->spi = x->id.spi; id->family = x->props.family; id->proto = x->id.proto; attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); err = -EMSGSIZE; if (attr == NULL) goto out_free_skb; p = nla_data(attr); } err = copy_to_user_state_extra(x, p, skb); if (err) goto out_free_skb; nlmsg_end(skb, nlh); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); out_free_skb: kfree_skb(skb); return err; } static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) { switch (c->event) { case XFRM_MSG_EXPIRE: return xfrm_exp_state_notify(x, c); case XFRM_MSG_NEWAE: return xfrm_aevent_state_notify(x, c); case XFRM_MSG_DELSA: case XFRM_MSG_UPDSA: case XFRM_MSG_NEWSA: return xfrm_notify_sa(x, c); case XFRM_MSG_FLUSHSA: return xfrm_notify_sa_flush(c); default: printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", c->event); break; } return 0; } static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x, struct xfrm_policy *xp) { return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) + nla_total_size(sizeof(struct xfrm_mark)) + nla_total_size(xfrm_user_sec_ctx_size(x->security)) + userpolicy_type_attrsize(); } static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, struct xfrm_tmpl *xt, struct xfrm_policy *xp) { __u32 seq = xfrm_get_acqseq(); struct xfrm_user_acquire *ua; struct nlmsghdr *nlh; int err; nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); if (nlh == NULL) return -EMSGSIZE; ua = nlmsg_data(nlh); memcpy(&ua->id, &x->id, sizeof(ua->id)); memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); ua->aalgos = xt->aalgos; ua->ealgos = xt->ealgos; ua->calgos = xt->calgos; ua->seq = x->km.seq = seq; err = copy_to_user_tmpl(xp, skb); if (!err) err = copy_to_user_state_sec_ctx(x, skb); if (!err) err = copy_to_user_policy_type(xp->type, skb); if (!err) err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); if (!err && xp->xdo.dev) err = copy_user_offload(&xp->xdo, skb); if (err) { nlmsg_cancel(skb, nlh); return err; } nlmsg_end(skb, nlh); return 0; } static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, struct xfrm_policy *xp) { struct net *net = xs_net(x); struct sk_buff *skb; int err; skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; err = build_acquire(skb, x, xt, xp); BUG_ON(err < 0); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); } /* User gives us xfrm_user_policy_info followed by an array of 0 * or more templates. */ static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, u8 *data, int len, int *dir) { struct net *net = sock_net(sk); struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); struct xfrm_policy *xp; int nr; switch (sk->sk_family) { case AF_INET: if (opt != IP_XFRM_POLICY) { *dir = -EOPNOTSUPP; return NULL; } break; #if IS_ENABLED(CONFIG_IPV6) case AF_INET6: if (opt != IPV6_XFRM_POLICY) { *dir = -EOPNOTSUPP; return NULL; } break; #endif default: *dir = -EINVAL; return NULL; } *dir = -EINVAL; if (len < sizeof(*p) || verify_newpolicy_info(p, NULL)) return NULL; nr = ((len - sizeof(*p)) / sizeof(*ut)); if (validate_tmpl(nr, ut, p->sel.family, p->dir, NULL)) return NULL; if (p->dir > XFRM_POLICY_OUT) return NULL; xp = xfrm_policy_alloc(net, GFP_ATOMIC); if (xp == NULL) { *dir = -ENOBUFS; return NULL; } copy_from_user_policy(xp, p); xp->type = XFRM_POLICY_TYPE_MAIN; copy_templates(xp, ut, nr); *dir = p->dir; return xp; } static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp) { return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) + nla_total_size(sizeof(struct xfrm_mark)) + userpolicy_type_attrsize(); } static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, int dir, const struct km_event *c) { struct xfrm_user_polexpire *upe; int hard = c->data.hard; struct nlmsghdr *nlh; int err; nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); if (nlh == NULL) return -EMSGSIZE; upe = nlmsg_data(nlh); copy_to_user_policy(xp, &upe->pol, dir); err = copy_to_user_tmpl(xp, skb); if (!err) err = copy_to_user_sec_ctx(xp, skb); if (!err) err = copy_to_user_policy_type(xp->type, skb); if (!err) err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); if (!err && xp->xdo.dev) err = copy_user_offload(&xp->xdo, skb); if (err) { nlmsg_cancel(skb, nlh); return err; } upe->hard = !!hard; nlmsg_end(skb, nlh); return 0; } static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) { struct net *net = xp_net(xp); struct sk_buff *skb; int err; skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; err = build_polexpire(skb, xp, dir, c); BUG_ON(err < 0); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); } static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) { unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); struct net *net = xp_net(xp); struct xfrm_userpolicy_info *p; struct xfrm_userpolicy_id *id; struct nlmsghdr *nlh; struct sk_buff *skb; unsigned int headlen; int err; headlen = sizeof(*p); if (c->event == XFRM_MSG_DELPOLICY) { len += nla_total_size(headlen); headlen = sizeof(*id); } len += userpolicy_type_attrsize(); len += nla_total_size(sizeof(struct xfrm_mark)); len += NLMSG_ALIGN(headlen); skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); err = -EMSGSIZE; if (nlh == NULL) goto out_free_skb; p = nlmsg_data(nlh); if (c->event == XFRM_MSG_DELPOLICY) { struct nlattr *attr; id = nlmsg_data(nlh); memset(id, 0, sizeof(*id)); id->dir = dir; if (c->data.byid) id->index = xp->index; else memcpy(&id->sel, &xp->selector, sizeof(id->sel)); attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); err = -EMSGSIZE; if (attr == NULL) goto out_free_skb; p = nla_data(attr); } copy_to_user_policy(xp, p, dir); err = copy_to_user_tmpl(xp, skb); if (!err) err = copy_to_user_policy_type(xp->type, skb); if (!err) err = xfrm_mark_put(skb, &xp->mark); if (!err) err = xfrm_if_id_put(skb, xp->if_id); if (!err && xp->xdo.dev) err = copy_user_offload(&xp->xdo, skb); if (err) goto out_free_skb; nlmsg_end(skb, nlh); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); out_free_skb: kfree_skb(skb); return err; } static int xfrm_notify_policy_flush(const struct km_event *c) { struct net *net = c->net; struct nlmsghdr *nlh; struct sk_buff *skb; int err; skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); err = -EMSGSIZE; if (nlh == NULL) goto out_free_skb; err = copy_to_user_policy_type(c->data.type, skb); if (err) goto out_free_skb; nlmsg_end(skb, nlh); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); out_free_skb: kfree_skb(skb); return err; } static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) { switch (c->event) { case XFRM_MSG_NEWPOLICY: case XFRM_MSG_UPDPOLICY: case XFRM_MSG_DELPOLICY: return xfrm_notify_policy(xp, dir, c); case XFRM_MSG_FLUSHPOLICY: return xfrm_notify_policy_flush(c); case XFRM_MSG_POLEXPIRE: return xfrm_exp_policy_notify(xp, dir, c); default: printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", c->event); } return 0; } static inline unsigned int xfrm_report_msgsize(void) { return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); } static int build_report(struct sk_buff *skb, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) { struct xfrm_user_report *ur; struct nlmsghdr *nlh; nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); if (nlh == NULL) return -EMSGSIZE; ur = nlmsg_data(nlh); ur->proto = proto; memcpy(&ur->sel, sel, sizeof(ur->sel)); if (addr) { int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); if (err) { nlmsg_cancel(skb, nlh); return err; } } nlmsg_end(skb, nlh); return 0; } static int xfrm_send_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) { struct sk_buff *skb; int err; skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; err = build_report(skb, proto, sel, addr); BUG_ON(err < 0); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); } static inline unsigned int xfrm_mapping_msgsize(void) { return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); } static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, xfrm_address_t *new_saddr, __be16 new_sport) { struct xfrm_user_mapping *um; struct nlmsghdr *nlh; nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); if (nlh == NULL) return -EMSGSIZE; um = nlmsg_data(nlh); memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); um->id.spi = x->id.spi; um->id.family = x->props.family; um->id.proto = x->id.proto; memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); um->new_sport = new_sport; um->old_sport = x->encap->encap_sport; um->reqid = x->props.reqid; nlmsg_end(skb, nlh); return 0; } static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) { struct net *net = xs_net(x); struct sk_buff *skb; int err; if (x->id.proto != IPPROTO_ESP) return -EINVAL; if (!x->encap) return -EINVAL; skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; err = build_mapping(skb, x, ipaddr, sport); BUG_ON(err < 0); return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); } static bool xfrm_is_alive(const struct km_event *c) { return (bool)xfrm_acquire_is_on(c->net); } static struct xfrm_mgr netlink_mgr = { .notify = xfrm_send_state_notify, .acquire = xfrm_send_acquire, .compile_policy = xfrm_compile_policy, .notify_policy = xfrm_send_policy_notify, .report = xfrm_send_report, .migrate = xfrm_send_migrate, .new_mapping = xfrm_send_mapping, .is_alive = xfrm_is_alive, }; static int __net_init xfrm_user_net_init(struct net *net) { struct sock *nlsk; struct netlink_kernel_cfg cfg = { .groups = XFRMNLGRP_MAX, .input = xfrm_netlink_rcv, }; nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); if (nlsk == NULL) return -ENOMEM; net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ rcu_assign_pointer(net->xfrm.nlsk, nlsk); return 0; } static void __net_exit xfrm_user_net_pre_exit(struct net *net) { RCU_INIT_POINTER(net->xfrm.nlsk, NULL); } static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) { struct net *net; list_for_each_entry(net, net_exit_list, exit_list) netlink_kernel_release(net->xfrm.nlsk_stash); } static struct pernet_operations xfrm_user_net_ops = { .init = xfrm_user_net_init, .pre_exit = xfrm_user_net_pre_exit, .exit_batch = xfrm_user_net_exit, }; static int __init xfrm_user_init(void) { int rv; printk(KERN_INFO "Initializing XFRM netlink socket\n"); rv = register_pernet_subsys(&xfrm_user_net_ops); if (rv < 0) return rv; xfrm_register_km(&netlink_mgr); return 0; } static void __exit xfrm_user_exit(void) { xfrm_unregister_km(&netlink_mgr); unregister_pernet_subsys(&xfrm_user_net_ops); } module_init(xfrm_user_init); module_exit(xfrm_user_exit); MODULE_DESCRIPTION("XFRM User interface"); MODULE_LICENSE("GPL"); MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
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