if_ipsec.c revision 1.3.2.2
1 1.3.2.2 snj /* $NetBSD: if_ipsec.c,v 1.3.2.2 2018/02/11 21:17:34 snj Exp $ */ 2 1.3.2.2 snj 3 1.3.2.2 snj /* 4 1.3.2.2 snj * Copyright (c) 2017 Internet Initiative Japan Inc. 5 1.3.2.2 snj * All rights reserved. 6 1.3.2.2 snj * 7 1.3.2.2 snj * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 snj * modification, are permitted provided that the following conditions 9 1.3.2.2 snj * are met: 10 1.3.2.2 snj * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 snj * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 snj * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 snj * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 snj * documentation and/or other materials provided with the distribution. 15 1.3.2.2 snj * 16 1.3.2.2 snj * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.3.2.2 snj * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.3.2.2 snj * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.3.2.2 snj * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.3.2.2 snj * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.3.2.2 snj * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.3.2.2 snj * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.3.2.2 snj * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.3.2.2 snj * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.3.2.2 snj * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.3.2.2 snj * POSSIBILITY OF SUCH DAMAGE. 27 1.3.2.2 snj */ 28 1.3.2.2 snj 29 1.3.2.2 snj #include <sys/cdefs.h> 30 1.3.2.2 snj __KERNEL_RCSID(0, "$NetBSD: if_ipsec.c,v 1.3.2.2 2018/02/11 21:17:34 snj Exp $"); 31 1.3.2.2 snj 32 1.3.2.2 snj #ifdef _KERNEL_OPT 33 1.3.2.2 snj #include "opt_inet.h" 34 1.3.2.2 snj #endif 35 1.3.2.2 snj 36 1.3.2.2 snj #include <sys/param.h> 37 1.3.2.2 snj #include <sys/systm.h> 38 1.3.2.2 snj #include <sys/kernel.h> 39 1.3.2.2 snj #include <sys/mbuf.h> 40 1.3.2.2 snj #include <sys/socket.h> 41 1.3.2.2 snj #include <sys/sockio.h> 42 1.3.2.2 snj #include <sys/errno.h> 43 1.3.2.2 snj #include <sys/ioctl.h> 44 1.3.2.2 snj #include <sys/time.h> 45 1.3.2.2 snj #include <sys/syslog.h> 46 1.3.2.2 snj #include <sys/cpu.h> 47 1.3.2.2 snj #include <sys/kmem.h> 48 1.3.2.2 snj #include <sys/mutex.h> 49 1.3.2.2 snj #include <sys/pserialize.h> 50 1.3.2.2 snj #include <sys/psref.h> 51 1.3.2.2 snj 52 1.3.2.2 snj #include <net/if.h> 53 1.3.2.2 snj #include <net/if_types.h> 54 1.3.2.2 snj #include <net/route.h> 55 1.3.2.2 snj #include <net/bpf.h> 56 1.3.2.2 snj #include <net/pfkeyv2.h> 57 1.3.2.2 snj 58 1.3.2.2 snj #include <netinet/in.h> 59 1.3.2.2 snj #include <netinet/in_systm.h> 60 1.3.2.2 snj #include <netinet/ip.h> 61 1.3.2.2 snj #ifdef INET 62 1.3.2.2 snj #include <netinet/in_var.h> 63 1.3.2.2 snj #endif /* INET */ 64 1.3.2.2 snj 65 1.3.2.2 snj #ifdef INET6 66 1.3.2.2 snj #include <netinet6/in6_var.h> 67 1.3.2.2 snj #include <netinet/ip6.h> 68 1.3.2.2 snj #include <netinet6/ip6_var.h> 69 1.3.2.2 snj #endif /* INET6 */ 70 1.3.2.2 snj 71 1.3.2.2 snj #include <netinet/ip_encap.h> 72 1.3.2.2 snj 73 1.3.2.2 snj #include <net/if_ipsec.h> 74 1.3.2.2 snj 75 1.3.2.2 snj #include <net/raw_cb.h> 76 1.3.2.2 snj #include <net/pfkeyv2.h> 77 1.3.2.2 snj 78 1.3.2.2 snj #include <netipsec/key.h> 79 1.3.2.2 snj #include <netipsec/ipsec.h> 80 1.3.2.2 snj #include <netipsec/ipsecif.h> 81 1.3.2.2 snj 82 1.3.2.2 snj static void if_ipsec_ro_init_pc(void *, void *, struct cpu_info *); 83 1.3.2.2 snj static void if_ipsec_ro_fini_pc(void *, void *, struct cpu_info *); 84 1.3.2.2 snj 85 1.3.2.2 snj static int if_ipsec_clone_create(struct if_clone *, int); 86 1.3.2.2 snj static int if_ipsec_clone_destroy(struct ifnet *); 87 1.3.2.2 snj 88 1.3.2.2 snj static inline int if_ipsec_out_direct(struct ipsec_variant *, struct mbuf *, int); 89 1.3.2.2 snj static inline void if_ipsec_in_enqueue(struct mbuf *, int, struct ifnet *); 90 1.3.2.2 snj 91 1.3.2.2 snj static int if_ipsec_encap_attach(struct ipsec_variant *); 92 1.3.2.2 snj static int if_ipsec_encap_detach(struct ipsec_variant *); 93 1.3.2.2 snj static int if_ipsec_set_tunnel(struct ifnet *, 94 1.3.2.2 snj struct sockaddr *, struct sockaddr *); 95 1.3.2.2 snj static void if_ipsec_delete_tunnel(struct ifnet *); 96 1.3.2.2 snj static int if_ipsec_ensure_flags(struct ifnet *, short); 97 1.3.2.2 snj static void if_ipsec_attach0(struct ipsec_softc *); 98 1.3.2.2 snj 99 1.3.2.2 snj static int if_ipsec_update_variant(struct ipsec_softc *, 100 1.3.2.2 snj struct ipsec_variant *, struct ipsec_variant *); 101 1.3.2.2 snj 102 1.3.2.2 snj /* sadb_msg */ 103 1.3.2.2 snj static inline void if_ipsec_add_mbuf(struct mbuf *, void *, size_t); 104 1.3.2.2 snj static inline void if_ipsec_add_pad(struct mbuf *, size_t); 105 1.3.2.2 snj static inline size_t if_ipsec_set_sadb_addr(struct sadb_address *, 106 1.3.2.2 snj struct sockaddr *, int, uint16_t); 107 1.3.2.2 snj static inline size_t if_ipsec_set_sadb_src(struct sadb_address *, 108 1.3.2.2 snj struct sockaddr *, int); 109 1.3.2.2 snj static inline size_t if_ipsec_set_sadb_dst(struct sadb_address *, 110 1.3.2.2 snj struct sockaddr *, int); 111 1.3.2.2 snj static inline size_t if_ipsec_set_sadb_x_policy(struct sadb_x_policy *, 112 1.3.2.2 snj struct sadb_x_ipsecrequest *, uint16_t, uint8_t, uint32_t, uint8_t); 113 1.3.2.2 snj static inline void if_ipsec_set_sadb_msg(struct sadb_msg *, uint16_t, uint8_t); 114 1.3.2.2 snj static inline void if_ipsec_set_sadb_msg_add(struct sadb_msg *, uint16_t); 115 1.3.2.2 snj static inline void if_ipsec_set_sadb_msg_del(struct sadb_msg *, uint16_t); 116 1.3.2.2 snj /* SPD */ 117 1.3.2.2 snj static int if_ipsec_share_sp(struct ipsec_variant *); 118 1.3.2.2 snj static int if_ipsec_unshare_sp(struct ipsec_variant *); 119 1.3.2.2 snj static inline struct secpolicy *if_ipsec_add_sp0(struct sockaddr *, 120 1.3.2.2 snj in_port_t, struct sockaddr *, in_port_t, int, int, int, u_int); 121 1.3.2.2 snj static inline int if_ipsec_del_sp0(struct secpolicy *); 122 1.3.2.2 snj static int if_ipsec_add_sp(struct ipsec_variant *, 123 1.3.2.2 snj struct sockaddr *, in_port_t, struct sockaddr *, in_port_t); 124 1.3.2.2 snj static void if_ipsec_del_sp(struct ipsec_variant *); 125 1.3.2.2 snj static int if_ipsec_replace_sp(struct ipsec_softc *, struct ipsec_variant *, 126 1.3.2.2 snj struct ipsec_variant *); 127 1.3.2.2 snj 128 1.3.2.2 snj static int if_ipsec_set_addr_port(struct sockaddr *, struct sockaddr *, 129 1.3.2.2 snj in_port_t); 130 1.3.2.2 snj #define IF_IPSEC_GATHER_PSRC_ADDR_PORT(var, target) \ 131 1.3.2.2 snj if_ipsec_set_addr_port(target, (var)->iv_psrc, (var)->iv_sport) 132 1.3.2.2 snj #define IF_IPSEC_GATHER_PDST_ADDR_PORT(var, target) \ 133 1.3.2.2 snj if_ipsec_set_addr_port(target, (var)->iv_pdst, (var)->iv_dport) 134 1.3.2.2 snj 135 1.3.2.2 snj /* 136 1.3.2.2 snj * ipsec global variable definitions 137 1.3.2.2 snj */ 138 1.3.2.2 snj 139 1.3.2.2 snj /* This list is used in ioctl context only. */ 140 1.3.2.2 snj LIST_HEAD(ipsec_sclist, ipsec_softc); 141 1.3.2.2 snj static struct { 142 1.3.2.2 snj struct ipsec_sclist list; 143 1.3.2.2 snj kmutex_t lock; 144 1.3.2.2 snj } ipsec_softcs __cacheline_aligned; 145 1.3.2.2 snj 146 1.3.2.2 snj pserialize_t ipsec_psz __read_mostly; 147 1.3.2.2 snj struct psref_class *iv_psref_class __read_mostly; 148 1.3.2.2 snj 149 1.3.2.2 snj struct if_clone ipsec_cloner = 150 1.3.2.2 snj IF_CLONE_INITIALIZER("ipsec", if_ipsec_clone_create, if_ipsec_clone_destroy); 151 1.3.2.2 snj static int max_ipsec_nesting = MAX_IPSEC_NEST; 152 1.3.2.2 snj 153 1.3.2.2 snj /* ARGSUSED */ 154 1.3.2.2 snj void 155 1.3.2.2 snj ipsecifattach(int count) 156 1.3.2.2 snj { 157 1.3.2.2 snj 158 1.3.2.2 snj mutex_init(&ipsec_softcs.lock, MUTEX_DEFAULT, IPL_NONE); 159 1.3.2.2 snj LIST_INIT(&ipsec_softcs.list); 160 1.3.2.2 snj 161 1.3.2.2 snj ipsec_psz = pserialize_create(); 162 1.3.2.2 snj iv_psref_class = psref_class_create("ipsecvar", IPL_SOFTNET); 163 1.3.2.2 snj 164 1.3.2.2 snj if_clone_attach(&ipsec_cloner); 165 1.3.2.2 snj } 166 1.3.2.2 snj 167 1.3.2.2 snj static int 168 1.3.2.2 snj if_ipsec_clone_create(struct if_clone *ifc, int unit) 169 1.3.2.2 snj { 170 1.3.2.2 snj struct ipsec_softc *sc; 171 1.3.2.2 snj struct ipsec_variant *var; 172 1.3.2.2 snj 173 1.3.2.2 snj sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 174 1.3.2.2 snj 175 1.3.2.2 snj if_initname(&sc->ipsec_if, ifc->ifc_name, unit); 176 1.3.2.2 snj 177 1.3.2.2 snj if_ipsec_attach0(sc); 178 1.3.2.2 snj 179 1.3.2.2 snj var = kmem_zalloc(sizeof(*var), KM_SLEEP); 180 1.3.2.2 snj var->iv_softc = sc; 181 1.3.2.2 snj psref_target_init(&var->iv_psref, iv_psref_class); 182 1.3.2.2 snj 183 1.3.2.2 snj sc->ipsec_var = var; 184 1.3.2.2 snj mutex_init(&sc->ipsec_lock, MUTEX_DEFAULT, IPL_NONE); 185 1.3.2.2 snj sc->ipsec_ro_percpu = percpu_alloc(sizeof(struct ipsec_ro)); 186 1.3.2.2 snj percpu_foreach(sc->ipsec_ro_percpu, if_ipsec_ro_init_pc, NULL); 187 1.3.2.2 snj 188 1.3.2.2 snj mutex_enter(&ipsec_softcs.lock); 189 1.3.2.2 snj LIST_INSERT_HEAD(&ipsec_softcs.list, sc, ipsec_list); 190 1.3.2.2 snj mutex_exit(&ipsec_softcs.lock); 191 1.3.2.2 snj return 0; 192 1.3.2.2 snj } 193 1.3.2.2 snj 194 1.3.2.2 snj static void 195 1.3.2.2 snj if_ipsec_attach0(struct ipsec_softc *sc) 196 1.3.2.2 snj { 197 1.3.2.2 snj 198 1.3.2.2 snj sc->ipsec_if.if_addrlen = 0; 199 1.3.2.2 snj sc->ipsec_if.if_mtu = IPSEC_MTU; 200 1.3.2.2 snj sc->ipsec_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 201 1.3.2.2 snj /* set ipsec(4) specific default flags. */ 202 1.3.2.2 snj sc->ipsec_if.if_flags |= IFF_FWD_IPV6; 203 1.3.2.2 snj sc->ipsec_if.if_extflags = IFEF_NO_LINK_STATE_CHANGE | IFEF_MPSAFE; 204 1.3.2.2 snj sc->ipsec_if.if_ioctl = if_ipsec_ioctl; 205 1.3.2.2 snj sc->ipsec_if.if_output = if_ipsec_output; 206 1.3.2.2 snj sc->ipsec_if.if_type = IFT_IPSEC; 207 1.3.2.2 snj sc->ipsec_if.if_dlt = DLT_NULL; 208 1.3.2.2 snj sc->ipsec_if.if_softc = sc; 209 1.3.2.2 snj IFQ_SET_READY(&sc->ipsec_if.if_snd); 210 1.3.2.2 snj if_initialize(&sc->ipsec_if); 211 1.3.2.2 snj if_alloc_sadl(&sc->ipsec_if); 212 1.3.2.2 snj bpf_attach(&sc->ipsec_if, DLT_NULL, sizeof(u_int)); 213 1.3.2.2 snj if_register(&sc->ipsec_if); 214 1.3.2.2 snj } 215 1.3.2.2 snj 216 1.3.2.2 snj static void 217 1.3.2.2 snj if_ipsec_ro_init_pc(void *p, void *arg __unused, struct cpu_info *ci __unused) 218 1.3.2.2 snj { 219 1.3.2.2 snj struct ipsec_ro *iro = p; 220 1.3.2.2 snj 221 1.3.2.2 snj mutex_init(&iro->ir_lock, MUTEX_DEFAULT, IPL_NONE); 222 1.3.2.2 snj } 223 1.3.2.2 snj 224 1.3.2.2 snj static void 225 1.3.2.2 snj if_ipsec_ro_fini_pc(void *p, void *arg __unused, struct cpu_info *ci __unused) 226 1.3.2.2 snj { 227 1.3.2.2 snj struct ipsec_ro *iro = p; 228 1.3.2.2 snj 229 1.3.2.2 snj rtcache_free(&iro->ir_ro); 230 1.3.2.2 snj 231 1.3.2.2 snj mutex_destroy(&iro->ir_lock); 232 1.3.2.2 snj } 233 1.3.2.2 snj 234 1.3.2.2 snj static int 235 1.3.2.2 snj if_ipsec_clone_destroy(struct ifnet *ifp) 236 1.3.2.2 snj { 237 1.3.2.2 snj struct ipsec_softc *sc = ifp->if_softc; 238 1.3.2.2 snj struct ipsec_variant *var; 239 1.3.2.2 snj int bound; 240 1.3.2.2 snj 241 1.3.2.2 snj mutex_enter(&ipsec_softcs.lock); 242 1.3.2.2 snj LIST_REMOVE(sc, ipsec_list); 243 1.3.2.2 snj mutex_exit(&ipsec_softcs.lock); 244 1.3.2.2 snj 245 1.3.2.2 snj bound = curlwp_bind(); 246 1.3.2.2 snj if_ipsec_delete_tunnel(&sc->ipsec_if); 247 1.3.2.2 snj curlwp_bindx(bound); 248 1.3.2.2 snj 249 1.3.2.2 snj bpf_detach(ifp); 250 1.3.2.2 snj if_detach(ifp); 251 1.3.2.2 snj 252 1.3.2.2 snj percpu_foreach(sc->ipsec_ro_percpu, if_ipsec_ro_fini_pc, NULL); 253 1.3.2.2 snj percpu_free(sc->ipsec_ro_percpu, sizeof(struct ipsec_ro)); 254 1.3.2.2 snj 255 1.3.2.2 snj mutex_destroy(&sc->ipsec_lock); 256 1.3.2.2 snj 257 1.3.2.2 snj var = sc->ipsec_var; 258 1.3.2.2 snj kmem_free(var, sizeof(*var)); 259 1.3.2.2 snj kmem_free(sc, sizeof(*sc)); 260 1.3.2.2 snj 261 1.3.2.2 snj return 0; 262 1.3.2.2 snj } 263 1.3.2.2 snj 264 1.3.2.2 snj static inline bool 265 1.3.2.2 snj if_ipsec_nat_t(struct ipsec_softc *sc) 266 1.3.2.2 snj { 267 1.3.2.2 snj 268 1.3.2.2 snj return (sc->ipsec_if.if_flags & IFF_NAT_T) != 0; 269 1.3.2.2 snj } 270 1.3.2.2 snj 271 1.3.2.2 snj static inline bool 272 1.3.2.2 snj if_ipsec_fwd_ipv6(struct ipsec_softc *sc) 273 1.3.2.2 snj { 274 1.3.2.2 snj 275 1.3.2.2 snj return (sc->ipsec_if.if_flags & IFF_FWD_IPV6) != 0; 276 1.3.2.2 snj } 277 1.3.2.2 snj 278 1.3.2.2 snj int 279 1.3.2.2 snj if_ipsec_encap_func(struct mbuf *m, int off, int proto, void *arg) 280 1.3.2.2 snj { 281 1.3.2.2 snj struct ip ip; 282 1.3.2.2 snj struct ipsec_softc *sc; 283 1.3.2.2 snj struct ipsec_variant *var = NULL; 284 1.3.2.2 snj struct psref psref; 285 1.3.2.2 snj int ret = 0; 286 1.3.2.2 snj 287 1.3.2.2 snj sc = arg; 288 1.3.2.2 snj KASSERT(sc != NULL); 289 1.3.2.2 snj 290 1.3.2.2 snj if ((sc->ipsec_if.if_flags & IFF_UP) == 0) 291 1.3.2.2 snj goto out; 292 1.3.2.2 snj 293 1.3.2.2 snj var = if_ipsec_getref_variant(sc, &psref); 294 1.3.2.2 snj if (if_ipsec_variant_is_unconfigured(var)) 295 1.3.2.2 snj goto out; 296 1.3.2.2 snj 297 1.3.2.2 snj switch (proto) { 298 1.3.2.2 snj case IPPROTO_IPV4: 299 1.3.2.2 snj case IPPROTO_IPV6: 300 1.3.2.2 snj break; 301 1.3.2.2 snj default: 302 1.3.2.2 snj goto out; 303 1.3.2.2 snj } 304 1.3.2.2 snj 305 1.3.2.2 snj if (m->m_pkthdr.len < sizeof(ip)) 306 1.3.2.2 snj goto out; 307 1.3.2.2 snj 308 1.3.2.2 snj m_copydata(m, 0, sizeof(ip), &ip); 309 1.3.2.2 snj switch (ip.ip_v) { 310 1.3.2.2 snj #ifdef INET 311 1.3.2.2 snj case IPVERSION: 312 1.3.2.2 snj if (var->iv_psrc->sa_family != AF_INET || 313 1.3.2.2 snj var->iv_pdst->sa_family != AF_INET) 314 1.3.2.2 snj goto out; 315 1.3.2.2 snj ret = ipsecif4_encap_func(m, &ip, var); 316 1.3.2.2 snj break; 317 1.3.2.2 snj #endif 318 1.3.2.2 snj default: 319 1.3.2.2 snj goto out; 320 1.3.2.2 snj } 321 1.3.2.2 snj 322 1.3.2.2 snj out: 323 1.3.2.2 snj if (var != NULL) 324 1.3.2.2 snj if_ipsec_putref_variant(var, &psref); 325 1.3.2.2 snj return ret; 326 1.3.2.2 snj } 327 1.3.2.2 snj 328 1.3.2.2 snj /* 329 1.3.2.2 snj * ipsec(4) I/F may cause infinite recursion calls when misconfigured. 330 1.3.2.2 snj * We'll prevent this by introducing upper limit. 331 1.3.2.2 snj */ 332 1.3.2.2 snj static int 333 1.3.2.2 snj if_ipsec_check_nesting(struct ifnet *ifp, struct mbuf *m) 334 1.3.2.2 snj { 335 1.3.2.2 snj 336 1.3.2.2 snj return if_tunnel_check_nesting(ifp, m, max_ipsec_nesting); 337 1.3.2.2 snj } 338 1.3.2.2 snj 339 1.3.2.2 snj int 340 1.3.2.2 snj if_ipsec_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 341 1.3.2.2 snj const struct rtentry *rt) 342 1.3.2.2 snj { 343 1.3.2.2 snj struct ipsec_softc *sc = ifp->if_softc; 344 1.3.2.2 snj struct ipsec_variant *var; 345 1.3.2.2 snj struct psref psref; 346 1.3.2.2 snj int error; 347 1.3.2.2 snj int bound; 348 1.3.2.2 snj 349 1.3.2.2 snj IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 350 1.3.2.2 snj 351 1.3.2.2 snj error = if_ipsec_check_nesting(ifp, m); 352 1.3.2.2 snj if (error) { 353 1.3.2.2 snj m_freem(m); 354 1.3.2.2 snj goto noref_end; 355 1.3.2.2 snj } 356 1.3.2.2 snj 357 1.3.2.2 snj if ((ifp->if_flags & IFF_UP) == 0) { 358 1.3.2.2 snj m_freem(m); 359 1.3.2.2 snj error = ENETDOWN; 360 1.3.2.2 snj goto noref_end; 361 1.3.2.2 snj } 362 1.3.2.2 snj 363 1.3.2.2 snj 364 1.3.2.2 snj bound = curlwp_bind(); 365 1.3.2.2 snj var = if_ipsec_getref_variant(sc, &psref); 366 1.3.2.2 snj if (if_ipsec_variant_is_unconfigured(var)) { 367 1.3.2.2 snj m_freem(m); 368 1.3.2.2 snj error = ENETDOWN; 369 1.3.2.2 snj goto end; 370 1.3.2.2 snj } 371 1.3.2.2 snj 372 1.3.2.2 snj m->m_flags &= ~(M_BCAST|M_MCAST); 373 1.3.2.2 snj 374 1.3.2.2 snj /* use DLT_NULL encapsulation here to pass inner af type */ 375 1.3.2.2 snj M_PREPEND(m, sizeof(int), M_DONTWAIT); 376 1.3.2.2 snj if (!m) { 377 1.3.2.2 snj error = ENOBUFS; 378 1.3.2.2 snj goto end; 379 1.3.2.2 snj } 380 1.3.2.2 snj *mtod(m, int *) = dst->sa_family; 381 1.3.2.2 snj 382 1.3.2.2 snj #if INET6 383 1.3.2.2 snj /* drop IPv6 packet if IFF_FWD_IPV6 is not set */ 384 1.3.2.2 snj if (dst->sa_family == AF_INET6 && 385 1.3.2.2 snj !if_ipsec_fwd_ipv6(sc)) { 386 1.3.2.2 snj /* 387 1.3.2.2 snj * IPv6 packet is not allowed to forward,that is not error. 388 1.3.2.2 snj */ 389 1.3.2.2 snj error = 0; 390 1.3.2.2 snj IF_DROP(&ifp->if_snd); 391 1.3.2.2 snj m_freem(m); 392 1.3.2.2 snj goto end; 393 1.3.2.2 snj } 394 1.3.2.2 snj #endif 395 1.3.2.2 snj 396 1.3.2.2 snj error = if_ipsec_out_direct(var, m, dst->sa_family); 397 1.3.2.2 snj 398 1.3.2.2 snj end: 399 1.3.2.2 snj if_ipsec_putref_variant(var, &psref); 400 1.3.2.2 snj curlwp_bindx(bound); 401 1.3.2.2 snj noref_end: 402 1.3.2.2 snj if (error) 403 1.3.2.2 snj ifp->if_oerrors++; 404 1.3.2.2 snj 405 1.3.2.2 snj return error; 406 1.3.2.2 snj } 407 1.3.2.2 snj 408 1.3.2.2 snj static inline int 409 1.3.2.2 snj if_ipsec_out_direct(struct ipsec_variant *var, struct mbuf *m, int family) 410 1.3.2.2 snj { 411 1.3.2.2 snj struct ifnet *ifp = &var->iv_softc->ipsec_if; 412 1.3.2.2 snj int error; 413 1.3.2.2 snj int len; 414 1.3.2.2 snj 415 1.3.2.2 snj KASSERT(if_ipsec_heldref_variant(var)); 416 1.3.2.2 snj KASSERT(var->iv_output != NULL); 417 1.3.2.2 snj 418 1.3.2.2 snj len = m->m_pkthdr.len; 419 1.3.2.2 snj 420 1.3.2.2 snj /* input DLT_NULL frame to BPF */ 421 1.3.2.2 snj bpf_mtap(ifp, m); 422 1.3.2.2 snj 423 1.3.2.2 snj /* grab and chop off inner af type */ 424 1.3.2.2 snj /* XXX need pullup? */ 425 1.3.2.2 snj m_adj(m, sizeof(int)); 426 1.3.2.2 snj 427 1.3.2.2 snj error = var->iv_output(var, family, m); 428 1.3.2.2 snj if (error) 429 1.3.2.2 snj return error; 430 1.3.2.2 snj 431 1.3.2.2 snj ifp->if_opackets++; 432 1.3.2.2 snj ifp->if_obytes += len; 433 1.3.2.2 snj 434 1.3.2.2 snj return 0; 435 1.3.2.2 snj } 436 1.3.2.2 snj 437 1.3.2.2 snj void 438 1.3.2.2 snj if_ipsec_input(struct mbuf *m, int af, struct ifnet *ifp) 439 1.3.2.2 snj { 440 1.3.2.2 snj 441 1.3.2.2 snj KASSERT(ifp != NULL); 442 1.3.2.2 snj 443 1.3.2.2 snj m_set_rcvif(m, ifp); 444 1.3.2.2 snj 445 1.3.2.2 snj bpf_mtap_af(ifp, af, m); 446 1.3.2.2 snj 447 1.3.2.2 snj if_ipsec_in_enqueue(m, af, ifp); 448 1.3.2.2 snj 449 1.3.2.2 snj return; 450 1.3.2.2 snj } 451 1.3.2.2 snj 452 1.3.2.2 snj static inline void 453 1.3.2.2 snj if_ipsec_in_enqueue(struct mbuf *m, int af, struct ifnet *ifp) 454 1.3.2.2 snj { 455 1.3.2.2 snj pktqueue_t *pktq; 456 1.3.2.2 snj int pktlen; 457 1.3.2.2 snj 458 1.3.2.2 snj /* 459 1.3.2.2 snj * Put the packet to the network layer input queue according to the 460 1.3.2.2 snj * specified address family. 461 1.3.2.2 snj */ 462 1.3.2.2 snj switch (af) { 463 1.3.2.2 snj #ifdef INET 464 1.3.2.2 snj case AF_INET: 465 1.3.2.2 snj pktq = ip_pktq; 466 1.3.2.2 snj break; 467 1.3.2.2 snj #endif 468 1.3.2.2 snj #ifdef INET6 469 1.3.2.2 snj case AF_INET6: 470 1.3.2.2 snj pktq = ip6_pktq; 471 1.3.2.2 snj break; 472 1.3.2.2 snj #endif 473 1.3.2.2 snj default: 474 1.3.2.2 snj ifp->if_ierrors++; 475 1.3.2.2 snj m_freem(m); 476 1.3.2.2 snj return; 477 1.3.2.2 snj } 478 1.3.2.2 snj 479 1.3.2.2 snj #if 1 480 1.3.2.2 snj const u_int h = curcpu()->ci_index; 481 1.3.2.2 snj #else 482 1.3.2.2 snj const uint32_t h = pktq_rps_hash(m); 483 1.3.2.2 snj #endif 484 1.3.2.2 snj pktlen = m->m_pkthdr.len; 485 1.3.2.2 snj if (__predict_true(pktq_enqueue(pktq, m, h))) { 486 1.3.2.2 snj ifp->if_ibytes += pktlen; 487 1.3.2.2 snj ifp->if_ipackets++; 488 1.3.2.2 snj } else { 489 1.3.2.2 snj m_freem(m); 490 1.3.2.2 snj } 491 1.3.2.2 snj 492 1.3.2.2 snj return; 493 1.3.2.2 snj } 494 1.3.2.2 snj 495 1.3.2.2 snj static inline int 496 1.3.2.2 snj if_ipsec_check_salen(struct sockaddr *addr) 497 1.3.2.2 snj { 498 1.3.2.2 snj 499 1.3.2.2 snj switch (addr->sa_family) { 500 1.3.2.2 snj #ifdef INET 501 1.3.2.2 snj case AF_INET: 502 1.3.2.2 snj if (addr->sa_len != sizeof(struct sockaddr_in)) 503 1.3.2.2 snj return EINVAL; 504 1.3.2.2 snj break; 505 1.3.2.2 snj #endif /* INET */ 506 1.3.2.2 snj #ifdef INET6 507 1.3.2.2 snj case AF_INET6: 508 1.3.2.2 snj if (addr->sa_len != sizeof(struct sockaddr_in6)) 509 1.3.2.2 snj return EINVAL; 510 1.3.2.2 snj break; 511 1.3.2.2 snj #endif /* INET6 */ 512 1.3.2.2 snj default: 513 1.3.2.2 snj return EAFNOSUPPORT; 514 1.3.2.2 snj } 515 1.3.2.2 snj 516 1.3.2.2 snj return 0; 517 1.3.2.2 snj } 518 1.3.2.2 snj 519 1.3.2.2 snj /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 520 1.3.2.2 snj int 521 1.3.2.2 snj if_ipsec_ioctl(struct ifnet *ifp, u_long cmd, void *data) 522 1.3.2.2 snj { 523 1.3.2.2 snj struct ipsec_softc *sc = ifp->if_softc; 524 1.3.2.2 snj struct ipsec_variant *var = NULL; 525 1.3.2.2 snj struct ifreq *ifr = (struct ifreq*)data; 526 1.3.2.2 snj struct ifaddr *ifa = (struct ifaddr*)data; 527 1.3.2.2 snj int error = 0, size; 528 1.3.2.2 snj struct sockaddr *dst, *src; 529 1.3.2.2 snj u_long mtu; 530 1.3.2.2 snj short oflags = ifp->if_flags; 531 1.3.2.2 snj int bound; 532 1.3.2.2 snj struct psref psref; 533 1.3.2.2 snj 534 1.3.2.2 snj switch (cmd) { 535 1.3.2.2 snj case SIOCINITIFADDR: 536 1.3.2.2 snj ifp->if_flags |= IFF_UP; 537 1.3.2.2 snj ifa->ifa_rtrequest = p2p_rtrequest; 538 1.3.2.2 snj break; 539 1.3.2.2 snj 540 1.3.2.2 snj case SIOCSIFDSTADDR: 541 1.3.2.2 snj break; 542 1.3.2.2 snj 543 1.3.2.2 snj case SIOCADDMULTI: 544 1.3.2.2 snj case SIOCDELMULTI: 545 1.3.2.2 snj switch (ifr->ifr_addr.sa_family) { 546 1.3.2.2 snj #ifdef INET 547 1.3.2.2 snj case AF_INET: /* IP supports Multicast */ 548 1.3.2.2 snj break; 549 1.3.2.2 snj #endif /* INET */ 550 1.3.2.2 snj #ifdef INET6 551 1.3.2.2 snj case AF_INET6: /* IP6 supports Multicast */ 552 1.3.2.2 snj break; 553 1.3.2.2 snj #endif /* INET6 */ 554 1.3.2.2 snj default: /* Other protocols doesn't support Multicast */ 555 1.3.2.2 snj error = EAFNOSUPPORT; 556 1.3.2.2 snj break; 557 1.3.2.2 snj } 558 1.3.2.2 snj break; 559 1.3.2.2 snj 560 1.3.2.2 snj case SIOCSIFMTU: 561 1.3.2.2 snj mtu = ifr->ifr_mtu; 562 1.3.2.2 snj if (mtu < IPSEC_MTU_MIN || mtu > IPSEC_MTU_MAX) 563 1.3.2.2 snj return EINVAL; 564 1.3.2.2 snj else if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 565 1.3.2.2 snj error = 0; 566 1.3.2.2 snj break; 567 1.3.2.2 snj 568 1.3.2.2 snj #ifdef INET 569 1.3.2.2 snj case SIOCSIFPHYADDR: 570 1.3.2.2 snj #endif 571 1.3.2.2 snj #ifdef INET6 572 1.3.2.2 snj case SIOCSIFPHYADDR_IN6: 573 1.3.2.2 snj #endif /* INET6 */ 574 1.3.2.2 snj case SIOCSLIFPHYADDR: 575 1.3.2.2 snj switch (cmd) { 576 1.3.2.2 snj #ifdef INET 577 1.3.2.2 snj case SIOCSIFPHYADDR: 578 1.3.2.2 snj src = (struct sockaddr *) 579 1.3.2.2 snj &(((struct in_aliasreq *)data)->ifra_addr); 580 1.3.2.2 snj dst = (struct sockaddr *) 581 1.3.2.2 snj &(((struct in_aliasreq *)data)->ifra_dstaddr); 582 1.3.2.2 snj break; 583 1.3.2.2 snj #endif /* INET */ 584 1.3.2.2 snj #ifdef INET6 585 1.3.2.2 snj case SIOCSIFPHYADDR_IN6: 586 1.3.2.2 snj src = (struct sockaddr *) 587 1.3.2.2 snj &(((struct in6_aliasreq *)data)->ifra_addr); 588 1.3.2.2 snj dst = (struct sockaddr *) 589 1.3.2.2 snj &(((struct in6_aliasreq *)data)->ifra_dstaddr); 590 1.3.2.2 snj break; 591 1.3.2.2 snj #endif /* INET6 */ 592 1.3.2.2 snj case SIOCSLIFPHYADDR: 593 1.3.2.2 snj src = (struct sockaddr *) 594 1.3.2.2 snj &(((struct if_laddrreq *)data)->addr); 595 1.3.2.2 snj dst = (struct sockaddr *) 596 1.3.2.2 snj &(((struct if_laddrreq *)data)->dstaddr); 597 1.3.2.2 snj break; 598 1.3.2.2 snj default: 599 1.3.2.2 snj return EINVAL; 600 1.3.2.2 snj } 601 1.3.2.2 snj 602 1.3.2.2 snj /* sa_family must be equal */ 603 1.3.2.2 snj if (src->sa_family != dst->sa_family) 604 1.3.2.2 snj return EINVAL; 605 1.3.2.2 snj 606 1.3.2.2 snj error = if_ipsec_check_salen(src); 607 1.3.2.2 snj if (error) 608 1.3.2.2 snj return error; 609 1.3.2.2 snj error = if_ipsec_check_salen(dst); 610 1.3.2.2 snj if (error) 611 1.3.2.2 snj return error; 612 1.3.2.2 snj 613 1.3.2.2 snj /* check sa_family looks sane for the cmd */ 614 1.3.2.2 snj switch (cmd) { 615 1.3.2.2 snj #ifdef INET 616 1.3.2.2 snj case SIOCSIFPHYADDR: 617 1.3.2.2 snj if (src->sa_family == AF_INET) 618 1.3.2.2 snj break; 619 1.3.2.2 snj return EAFNOSUPPORT; 620 1.3.2.2 snj #endif /* INET */ 621 1.3.2.2 snj #ifdef INET6 622 1.3.2.2 snj case SIOCSIFPHYADDR_IN6: 623 1.3.2.2 snj if (src->sa_family == AF_INET6) 624 1.3.2.2 snj break; 625 1.3.2.2 snj return EAFNOSUPPORT; 626 1.3.2.2 snj #endif /* INET6 */ 627 1.3.2.2 snj case SIOCSLIFPHYADDR: 628 1.3.2.2 snj /* checks done in the above */ 629 1.3.2.2 snj break; 630 1.3.2.2 snj } 631 1.3.2.2 snj /* 632 1.3.2.2 snj * calls if_ipsec_getref_variant() for other softcs to check 633 1.3.2.2 snj * address pair duplicattion 634 1.3.2.2 snj */ 635 1.3.2.2 snj bound = curlwp_bind(); 636 1.3.2.2 snj error = if_ipsec_set_tunnel(&sc->ipsec_if, src, dst); 637 1.3.2.2 snj if (error) 638 1.3.2.2 snj goto bad; 639 1.3.2.2 snj break; 640 1.3.2.2 snj 641 1.3.2.2 snj case SIOCDIFPHYADDR: 642 1.3.2.2 snj bound = curlwp_bind(); 643 1.3.2.2 snj if_ipsec_delete_tunnel(&sc->ipsec_if); 644 1.3.2.2 snj curlwp_bindx(bound); 645 1.3.2.2 snj break; 646 1.3.2.2 snj 647 1.3.2.2 snj case SIOCGIFPSRCADDR: 648 1.3.2.2 snj #ifdef INET6 649 1.3.2.2 snj case SIOCGIFPSRCADDR_IN6: 650 1.3.2.2 snj #endif /* INET6 */ 651 1.3.2.2 snj bound = curlwp_bind(); 652 1.3.2.2 snj var = if_ipsec_getref_variant(sc, &psref); 653 1.3.2.2 snj if (var->iv_psrc == NULL) { 654 1.3.2.2 snj error = EADDRNOTAVAIL; 655 1.3.2.2 snj goto bad; 656 1.3.2.2 snj } 657 1.3.2.2 snj src = var->iv_psrc; 658 1.3.2.2 snj switch (cmd) { 659 1.3.2.2 snj #ifdef INET 660 1.3.2.2 snj case SIOCGIFPSRCADDR: 661 1.3.2.2 snj dst = &ifr->ifr_addr; 662 1.3.2.2 snj size = sizeof(ifr->ifr_addr); 663 1.3.2.2 snj break; 664 1.3.2.2 snj #endif /* INET */ 665 1.3.2.2 snj #ifdef INET6 666 1.3.2.2 snj case SIOCGIFPSRCADDR_IN6: 667 1.3.2.2 snj dst = (struct sockaddr *) 668 1.3.2.2 snj &(((struct in6_ifreq *)data)->ifr_addr); 669 1.3.2.2 snj size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 670 1.3.2.2 snj break; 671 1.3.2.2 snj #endif /* INET6 */ 672 1.3.2.2 snj default: 673 1.3.2.2 snj error = EADDRNOTAVAIL; 674 1.3.2.2 snj goto bad; 675 1.3.2.2 snj } 676 1.3.2.2 snj if (src->sa_len > size) { 677 1.3.2.2 snj error = EINVAL; 678 1.3.2.2 snj goto bad; 679 1.3.2.2 snj } 680 1.3.2.2 snj error = IF_IPSEC_GATHER_PSRC_ADDR_PORT(var, dst); 681 1.3.2.2 snj if (error) 682 1.3.2.2 snj goto bad; 683 1.3.2.2 snj if_ipsec_putref_variant(var, &psref); 684 1.3.2.2 snj curlwp_bindx(bound); 685 1.3.2.2 snj break; 686 1.3.2.2 snj 687 1.3.2.2 snj case SIOCGIFPDSTADDR: 688 1.3.2.2 snj #ifdef INET6 689 1.3.2.2 snj case SIOCGIFPDSTADDR_IN6: 690 1.3.2.2 snj #endif /* INET6 */ 691 1.3.2.2 snj bound = curlwp_bind(); 692 1.3.2.2 snj var = if_ipsec_getref_variant(sc, &psref); 693 1.3.2.2 snj if (var->iv_pdst == NULL) { 694 1.3.2.2 snj error = EADDRNOTAVAIL; 695 1.3.2.2 snj goto bad; 696 1.3.2.2 snj } 697 1.3.2.2 snj src = var->iv_pdst; 698 1.3.2.2 snj switch (cmd) { 699 1.3.2.2 snj #ifdef INET 700 1.3.2.2 snj case SIOCGIFPDSTADDR: 701 1.3.2.2 snj dst = &ifr->ifr_addr; 702 1.3.2.2 snj size = sizeof(ifr->ifr_addr); 703 1.3.2.2 snj break; 704 1.3.2.2 snj #endif /* INET */ 705 1.3.2.2 snj #ifdef INET6 706 1.3.2.2 snj case SIOCGIFPDSTADDR_IN6: 707 1.3.2.2 snj dst = (struct sockaddr *) 708 1.3.2.2 snj &(((struct in6_ifreq *)data)->ifr_addr); 709 1.3.2.2 snj size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 710 1.3.2.2 snj break; 711 1.3.2.2 snj #endif /* INET6 */ 712 1.3.2.2 snj default: 713 1.3.2.2 snj error = EADDRNOTAVAIL; 714 1.3.2.2 snj goto bad; 715 1.3.2.2 snj } 716 1.3.2.2 snj if (src->sa_len > size) { 717 1.3.2.2 snj error = EINVAL; 718 1.3.2.2 snj goto bad; 719 1.3.2.2 snj } 720 1.3.2.2 snj error = IF_IPSEC_GATHER_PDST_ADDR_PORT(var, dst); 721 1.3.2.2 snj if (error) 722 1.3.2.2 snj goto bad; 723 1.3.2.2 snj if_ipsec_putref_variant(var, &psref); 724 1.3.2.2 snj curlwp_bindx(bound); 725 1.3.2.2 snj break; 726 1.3.2.2 snj 727 1.3.2.2 snj case SIOCGLIFPHYADDR: 728 1.3.2.2 snj bound = curlwp_bind(); 729 1.3.2.2 snj var = if_ipsec_getref_variant(sc, &psref); 730 1.3.2.2 snj if (if_ipsec_variant_is_unconfigured(var)) { 731 1.3.2.2 snj error = EADDRNOTAVAIL; 732 1.3.2.2 snj goto bad; 733 1.3.2.2 snj } 734 1.3.2.2 snj 735 1.3.2.2 snj /* copy src */ 736 1.3.2.2 snj src = var->iv_psrc; 737 1.3.2.2 snj dst = (struct sockaddr *) 738 1.3.2.2 snj &(((struct if_laddrreq *)data)->addr); 739 1.3.2.2 snj size = sizeof(((struct if_laddrreq *)data)->addr); 740 1.3.2.2 snj if (src->sa_len > size) { 741 1.3.2.2 snj error = EINVAL; 742 1.3.2.2 snj goto bad; 743 1.3.2.2 snj } 744 1.3.2.2 snj error = IF_IPSEC_GATHER_PSRC_ADDR_PORT(var, dst); 745 1.3.2.2 snj if (error) 746 1.3.2.2 snj goto bad; 747 1.3.2.2 snj 748 1.3.2.2 snj /* copy dst */ 749 1.3.2.2 snj src = var->iv_pdst; 750 1.3.2.2 snj dst = (struct sockaddr *) 751 1.3.2.2 snj &(((struct if_laddrreq *)data)->dstaddr); 752 1.3.2.2 snj size = sizeof(((struct if_laddrreq *)data)->dstaddr); 753 1.3.2.2 snj if (src->sa_len > size) { 754 1.3.2.2 snj error = EINVAL; 755 1.3.2.2 snj goto bad; 756 1.3.2.2 snj } 757 1.3.2.2 snj error = IF_IPSEC_GATHER_PDST_ADDR_PORT(var, dst); 758 1.3.2.2 snj if (error) 759 1.3.2.2 snj goto bad; 760 1.3.2.2 snj if_ipsec_putref_variant(var, &psref); 761 1.3.2.2 snj curlwp_bindx(bound); 762 1.3.2.2 snj break; 763 1.3.2.2 snj 764 1.3.2.2 snj default: 765 1.3.2.2 snj error = ifioctl_common(ifp, cmd, data); 766 1.3.2.2 snj if (!error) { 767 1.3.2.2 snj bound = curlwp_bind(); 768 1.3.2.2 snj error = if_ipsec_ensure_flags(&sc->ipsec_if, oflags); 769 1.3.2.2 snj if (error) 770 1.3.2.2 snj goto bad; 771 1.3.2.2 snj } 772 1.3.2.2 snj break; 773 1.3.2.2 snj } 774 1.3.2.2 snj return error; 775 1.3.2.2 snj 776 1.3.2.2 snj bad: 777 1.3.2.2 snj if (var != NULL) 778 1.3.2.2 snj if_ipsec_putref_variant(var, &psref); 779 1.3.2.2 snj curlwp_bindx(bound); 780 1.3.2.2 snj 781 1.3.2.2 snj return error; 782 1.3.2.2 snj } 783 1.3.2.2 snj 784 1.3.2.2 snj struct encap_funcs { 785 1.3.2.2 snj #ifdef INET 786 1.3.2.2 snj int (*ef_inet)(struct ipsec_variant *); 787 1.3.2.2 snj #endif 788 1.3.2.2 snj #ifdef INET6 789 1.3.2.2 snj int (*ef_inet6)(struct ipsec_variant *); 790 1.3.2.2 snj #endif 791 1.3.2.2 snj }; 792 1.3.2.2 snj 793 1.3.2.2 snj static struct encap_funcs ipsec_encap_attach = { 794 1.3.2.2 snj #ifdef INET 795 1.3.2.2 snj .ef_inet = ipsecif4_attach, 796 1.3.2.2 snj #endif 797 1.3.2.2 snj #ifdef INET6 798 1.3.2.2 snj .ef_inet6 = &ipsecif6_attach, 799 1.3.2.2 snj #endif 800 1.3.2.2 snj }; 801 1.3.2.2 snj 802 1.3.2.2 snj static struct encap_funcs ipsec_encap_detach = { 803 1.3.2.2 snj #ifdef INET 804 1.3.2.2 snj .ef_inet = ipsecif4_detach, 805 1.3.2.2 snj #endif 806 1.3.2.2 snj #ifdef INET6 807 1.3.2.2 snj .ef_inet6 = &ipsecif6_detach, 808 1.3.2.2 snj #endif 809 1.3.2.2 snj }; 810 1.3.2.2 snj 811 1.3.2.2 snj static int 812 1.3.2.2 snj if_ipsec_encap_common(struct ipsec_variant *var, struct encap_funcs *funcs) 813 1.3.2.2 snj { 814 1.3.2.2 snj int error; 815 1.3.2.2 snj 816 1.3.2.2 snj KASSERT(var != NULL); 817 1.3.2.2 snj KASSERT(if_ipsec_variant_is_configured(var)); 818 1.3.2.2 snj 819 1.3.2.2 snj switch (var->iv_psrc->sa_family) { 820 1.3.2.2 snj #ifdef INET 821 1.3.2.2 snj case AF_INET: 822 1.3.2.2 snj error = (funcs->ef_inet)(var); 823 1.3.2.2 snj break; 824 1.3.2.2 snj #endif /* INET */ 825 1.3.2.2 snj #ifdef INET6 826 1.3.2.2 snj case AF_INET6: 827 1.3.2.2 snj error = (funcs->ef_inet6)(var); 828 1.3.2.2 snj break; 829 1.3.2.2 snj #endif /* INET6 */ 830 1.3.2.2 snj default: 831 1.3.2.2 snj error = EINVAL; 832 1.3.2.2 snj break; 833 1.3.2.2 snj } 834 1.3.2.2 snj 835 1.3.2.2 snj return error; 836 1.3.2.2 snj } 837 1.3.2.2 snj 838 1.3.2.2 snj static int 839 1.3.2.2 snj if_ipsec_encap_attach(struct ipsec_variant *var) 840 1.3.2.2 snj { 841 1.3.2.2 snj 842 1.3.2.2 snj return if_ipsec_encap_common(var, &ipsec_encap_attach); 843 1.3.2.2 snj } 844 1.3.2.2 snj 845 1.3.2.2 snj static int 846 1.3.2.2 snj if_ipsec_encap_detach(struct ipsec_variant *var) 847 1.3.2.2 snj { 848 1.3.2.2 snj 849 1.3.2.2 snj return if_ipsec_encap_common(var, &ipsec_encap_detach); 850 1.3.2.2 snj } 851 1.3.2.2 snj 852 1.3.2.2 snj /* 853 1.3.2.2 snj * Validate and set ipsec(4) I/F configurations. 854 1.3.2.2 snj * (1) validate 855 1.3.2.2 snj * (1-1) Check the argument src and dst address pair will change 856 1.3.2.2 snj * configuration from current src and dst address pair. 857 1.3.2.2 snj * (1-2) Check any ipsec(4) I/F uses duplicated src and dst address pair 858 1.3.2.2 snj * with argument src and dst address pair, except for NAT-T shared 859 1.3.2.2 snj * tunnels. 860 1.3.2.2 snj * (2) set 861 1.3.2.2 snj * (2-1) Create variant for new configuration. 862 1.3.2.2 snj * (2-2) Create temporary "null" variant used to avoid to access 863 1.3.2.2 snj * dangling variant while SPs are deleted and added. 864 1.3.2.2 snj * (2-3) Swap variant include its SPs. 865 1.3.2.2 snj * (2-4) Cleanup last configurations. 866 1.3.2.2 snj */ 867 1.3.2.2 snj static int 868 1.3.2.2 snj if_ipsec_set_tunnel(struct ifnet *ifp, 869 1.3.2.2 snj struct sockaddr *src, struct sockaddr *dst) 870 1.3.2.2 snj { 871 1.3.2.2 snj struct ipsec_softc *sc = ifp->if_softc; 872 1.3.2.2 snj struct ipsec_softc *sc2; 873 1.3.2.2 snj struct ipsec_variant *ovar, *nvar, *nullvar; 874 1.3.2.2 snj struct sockaddr *osrc, *odst; 875 1.3.2.2 snj struct sockaddr *nsrc, *ndst; 876 1.3.2.2 snj in_port_t nsport = 0, ndport = 0; 877 1.3.2.2 snj int error; 878 1.3.2.2 snj 879 1.3.2.2 snj error = encap_lock_enter(); 880 1.3.2.2 snj if (error) 881 1.3.2.2 snj return error; 882 1.3.2.2 snj 883 1.3.2.2 snj nsrc = sockaddr_dup(src, M_WAITOK); 884 1.3.2.2 snj ndst = sockaddr_dup(dst, M_WAITOK); 885 1.3.2.2 snj nvar = kmem_zalloc(sizeof(*nvar), KM_SLEEP); 886 1.3.2.2 snj nullvar = kmem_zalloc(sizeof(*nullvar), KM_SLEEP); 887 1.3.2.2 snj 888 1.3.2.2 snj mutex_enter(&sc->ipsec_lock); 889 1.3.2.2 snj 890 1.3.2.2 snj ovar = sc->ipsec_var; 891 1.3.2.2 snj 892 1.3.2.2 snj switch(nsrc->sa_family) { 893 1.3.2.2 snj #ifdef INET 894 1.3.2.2 snj case AF_INET: 895 1.3.2.2 snj nsport = ntohs(satosin(src)->sin_port); 896 1.3.2.2 snj /* 897 1.3.2.2 snj * avoid confuse SP when NAT-T disabled, 898 1.3.2.2 snj * e.g. 899 1.3.2.2 snj * expected: 10.0.1.2[any] 10.0.1.1[any] 4(ipv4) 900 1.3.2.2 snj * confuse : 10.0.1.2[600] 10.0.1.1[600] 4(ipv4) 901 1.3.2.2 snj */ 902 1.3.2.2 snj satosin(nsrc)->sin_port = 0; 903 1.3.2.2 snj ndport = ntohs(satosin(dst)->sin_port); 904 1.3.2.2 snj satosin(ndst)->sin_port = 0; 905 1.3.2.2 snj break; 906 1.3.2.2 snj #endif /* INET */ 907 1.3.2.2 snj #ifdef INET6 908 1.3.2.2 snj case AF_INET6: 909 1.3.2.2 snj nsport = ntohs(satosin6(src)->sin6_port); 910 1.3.2.2 snj satosin6(nsrc)->sin6_port = 0; 911 1.3.2.2 snj ndport = ntohs(satosin6(dst)->sin6_port); 912 1.3.2.2 snj satosin6(ndst)->sin6_port = 0; 913 1.3.2.2 snj break; 914 1.3.2.2 snj #endif /* INET6 */ 915 1.3.2.2 snj default: 916 1.3.2.2 snj log(LOG_DEBUG, 917 1.3.2.2 snj "%s: Invalid address family: %d.\n", 918 1.3.2.2 snj __func__, src->sa_family); 919 1.3.2.2 snj error = EINVAL; 920 1.3.2.2 snj goto out; 921 1.3.2.2 snj } 922 1.3.2.2 snj 923 1.3.2.2 snj /* 924 1.3.2.2 snj * (1-1) Check the argument src and dst address pair will change 925 1.3.2.2 snj * configuration from current src and dst address pair. 926 1.3.2.2 snj */ 927 1.3.2.2 snj if ((ovar->iv_pdst && sockaddr_cmp(ovar->iv_pdst, dst) == 0) && 928 1.3.2.2 snj (ovar->iv_psrc && sockaddr_cmp(ovar->iv_psrc, src) == 0) && 929 1.3.2.2 snj (ovar->iv_sport == nsport && ovar->iv_dport == ndport)) { 930 1.3.2.2 snj /* address and port pair not changed. */ 931 1.3.2.2 snj error = 0; 932 1.3.2.2 snj goto out; 933 1.3.2.2 snj } 934 1.3.2.2 snj 935 1.3.2.2 snj /* 936 1.3.2.2 snj * (1-2) Check any ipsec(4) I/F uses duplicated src and dst address pair 937 1.3.2.2 snj * with argument src and dst address pair, except for NAT-T shared 938 1.3.2.2 snj * tunnels. 939 1.3.2.2 snj */ 940 1.3.2.2 snj mutex_enter(&ipsec_softcs.lock); 941 1.3.2.2 snj LIST_FOREACH(sc2, &ipsec_softcs.list, ipsec_list) { 942 1.3.2.2 snj struct ipsec_variant *var2; 943 1.3.2.2 snj struct psref psref; 944 1.3.2.2 snj 945 1.3.2.2 snj if (sc2 == sc) 946 1.3.2.2 snj continue; 947 1.3.2.2 snj var2 = if_ipsec_getref_variant(sc2, &psref); 948 1.3.2.2 snj if (if_ipsec_variant_is_unconfigured(var2)) { 949 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 950 1.3.2.2 snj continue; 951 1.3.2.2 snj } 952 1.3.2.2 snj if (if_ipsec_nat_t(sc) || if_ipsec_nat_t(sc2)) { 953 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 954 1.3.2.2 snj continue; /* NAT-T shared tunnel */ 955 1.3.2.2 snj } 956 1.3.2.2 snj if (sockaddr_cmp(var2->iv_pdst, dst) == 0 && 957 1.3.2.2 snj sockaddr_cmp(var2->iv_psrc, src) == 0) { 958 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 959 1.3.2.2 snj mutex_exit(&ipsec_softcs.lock); 960 1.3.2.2 snj error = EADDRNOTAVAIL; 961 1.3.2.2 snj goto out; 962 1.3.2.2 snj } 963 1.3.2.2 snj 964 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 965 1.3.2.2 snj /* XXX both end must be valid? (I mean, not 0.0.0.0) */ 966 1.3.2.2 snj } 967 1.3.2.2 snj mutex_exit(&ipsec_softcs.lock); 968 1.3.2.2 snj 969 1.3.2.2 snj 970 1.3.2.2 snj osrc = ovar->iv_psrc; 971 1.3.2.2 snj odst = ovar->iv_pdst; 972 1.3.2.2 snj 973 1.3.2.2 snj /* 974 1.3.2.2 snj * (2-1) Create ipsec_variant for new configuration. 975 1.3.2.2 snj */ 976 1.3.2.2 snj if_ipsec_copy_variant(nvar, ovar); 977 1.3.2.2 snj nvar->iv_psrc = nsrc; 978 1.3.2.2 snj nvar->iv_pdst = ndst; 979 1.3.2.2 snj nvar->iv_sport = nsport; 980 1.3.2.2 snj nvar->iv_dport = ndport; 981 1.3.2.2 snj nvar->iv_encap_cookie4 = NULL; 982 1.3.2.2 snj nvar->iv_encap_cookie6 = NULL; 983 1.3.2.2 snj psref_target_init(&nvar->iv_psref, iv_psref_class); 984 1.3.2.2 snj error = if_ipsec_encap_attach(nvar); 985 1.3.2.2 snj if (error) 986 1.3.2.2 snj goto out; 987 1.3.2.2 snj 988 1.3.2.2 snj /* 989 1.3.2.2 snj * (2-2) Create temporary "null" variant. 990 1.3.2.2 snj */ 991 1.3.2.2 snj if_ipsec_copy_variant(nullvar, ovar); 992 1.3.2.2 snj if_ipsec_clear_config(nullvar); 993 1.3.2.2 snj psref_target_init(&nullvar->iv_psref, iv_psref_class); 994 1.3.2.2 snj membar_producer(); 995 1.3.2.2 snj /* 996 1.3.2.2 snj * (2-3) Swap variant include its SPs. 997 1.3.2.2 snj */ 998 1.3.2.2 snj error = if_ipsec_update_variant(sc, nvar, nullvar); 999 1.3.2.2 snj if (error) { 1000 1.3.2.2 snj if_ipsec_encap_detach(nvar); 1001 1.3.2.2 snj goto out; 1002 1.3.2.2 snj } 1003 1.3.2.2 snj 1004 1.3.2.2 snj mutex_exit(&sc->ipsec_lock); 1005 1.3.2.2 snj 1006 1.3.2.2 snj /* 1007 1.3.2.2 snj * (2-4) Cleanup last configurations. 1008 1.3.2.2 snj */ 1009 1.3.2.2 snj if (if_ipsec_variant_is_configured(ovar)) 1010 1.3.2.2 snj if_ipsec_encap_detach(ovar); 1011 1.3.2.2 snj encap_lock_exit(); 1012 1.3.2.2 snj 1013 1.3.2.2 snj if (osrc != NULL) 1014 1.3.2.2 snj sockaddr_free(osrc); 1015 1.3.2.2 snj if (odst != NULL) 1016 1.3.2.2 snj sockaddr_free(odst); 1017 1.3.2.2 snj kmem_free(ovar, sizeof(*ovar)); 1018 1.3.2.2 snj kmem_free(nullvar, sizeof(*nullvar)); 1019 1.3.2.2 snj 1020 1.3.2.2 snj return 0; 1021 1.3.2.2 snj 1022 1.3.2.2 snj out: 1023 1.3.2.2 snj mutex_exit(&sc->ipsec_lock); 1024 1.3.2.2 snj encap_lock_exit(); 1025 1.3.2.2 snj 1026 1.3.2.2 snj sockaddr_free(nsrc); 1027 1.3.2.2 snj sockaddr_free(ndst); 1028 1.3.2.2 snj kmem_free(nvar, sizeof(*nvar)); 1029 1.3.2.2 snj kmem_free(nullvar, sizeof(*nullvar)); 1030 1.3.2.2 snj 1031 1.3.2.2 snj return error; 1032 1.3.2.2 snj } 1033 1.3.2.2 snj 1034 1.3.2.2 snj /* 1035 1.3.2.2 snj * Validate and delete ipsec(4) I/F configurations. 1036 1.3.2.2 snj * (1) validate 1037 1.3.2.2 snj * (1-1) Check current src and dst address pair are null, 1038 1.3.2.2 snj * which means the ipsec(4) I/F is already done deletetunnel. 1039 1.3.2.2 snj * (2) delete 1040 1.3.2.2 snj * (2-1) Create variant for deleted status. 1041 1.3.2.2 snj * (2-2) Create temporary "null" variant used to avoid to access 1042 1.3.2.2 snj * dangling variant while SPs are deleted and added. 1043 1.3.2.2 snj * NOTE: 1044 1.3.2.2 snj * The contents of temporary "null" variant equal to the variant 1045 1.3.2.2 snj * of (2-1), however two psref_target_destroy() synchronization 1046 1.3.2.2 snj * points are necessary to avoid to access dangling variant 1047 1.3.2.2 snj * while SPs are deleted and added. To implement that simply, 1048 1.3.2.2 snj * we use the same manner as if_ipsec_set_tunnel(), that is, 1049 1.3.2.2 snj * create extra "null" variant and use it temporarily. 1050 1.3.2.2 snj * (2-3) Swap variant include its SPs. 1051 1.3.2.2 snj * (2-4) Cleanup last configurations. 1052 1.3.2.2 snj */ 1053 1.3.2.2 snj static void 1054 1.3.2.2 snj if_ipsec_delete_tunnel(struct ifnet *ifp) 1055 1.3.2.2 snj { 1056 1.3.2.2 snj struct ipsec_softc *sc = ifp->if_softc; 1057 1.3.2.2 snj struct ipsec_variant *ovar, *nvar, *nullvar; 1058 1.3.2.2 snj struct sockaddr *osrc, *odst; 1059 1.3.2.2 snj int error; 1060 1.3.2.2 snj 1061 1.3.2.2 snj error = encap_lock_enter(); 1062 1.3.2.2 snj if (error) 1063 1.3.2.2 snj return; 1064 1.3.2.2 snj 1065 1.3.2.2 snj nvar = kmem_zalloc(sizeof(*nvar), KM_SLEEP); 1066 1.3.2.2 snj nullvar = kmem_zalloc(sizeof(*nullvar), KM_SLEEP); 1067 1.3.2.2 snj 1068 1.3.2.2 snj mutex_enter(&sc->ipsec_lock); 1069 1.3.2.2 snj 1070 1.3.2.2 snj ovar = sc->ipsec_var; 1071 1.3.2.2 snj osrc = ovar->iv_psrc; 1072 1.3.2.2 snj odst = ovar->iv_pdst; 1073 1.3.2.2 snj /* 1074 1.3.2.2 snj * (1-1) Check current src and dst address pair are null, 1075 1.3.2.2 snj * which means the ipsec(4) I/F is already done deletetunnel. 1076 1.3.2.2 snj */ 1077 1.3.2.2 snj if (osrc == NULL || odst == NULL) { 1078 1.3.2.2 snj /* address pair not changed. */ 1079 1.3.2.2 snj mutex_exit(&sc->ipsec_lock); 1080 1.3.2.2 snj encap_lock_exit(); 1081 1.3.2.2 snj kmem_free(nvar, sizeof(*nvar)); 1082 1.3.2.2 snj return; 1083 1.3.2.2 snj } 1084 1.3.2.2 snj 1085 1.3.2.2 snj /* 1086 1.3.2.2 snj * (2-1) Create variant for deleted status. 1087 1.3.2.2 snj */ 1088 1.3.2.2 snj if_ipsec_copy_variant(nvar, ovar); 1089 1.3.2.2 snj if_ipsec_clear_config(nvar); 1090 1.3.2.2 snj psref_target_init(&nvar->iv_psref, iv_psref_class); 1091 1.3.2.2 snj 1092 1.3.2.2 snj /* 1093 1.3.2.2 snj * (2-2) Create temporary "null" variant used to avoid to access 1094 1.3.2.2 snj * dangling variant while SPs are deleted and added. 1095 1.3.2.2 snj */ 1096 1.3.2.2 snj if_ipsec_copy_variant(nullvar, ovar); 1097 1.3.2.2 snj if_ipsec_clear_config(nullvar); 1098 1.3.2.2 snj psref_target_init(&nullvar->iv_psref, iv_psref_class); 1099 1.3.2.2 snj membar_producer(); 1100 1.3.2.2 snj /* 1101 1.3.2.2 snj * (2-3) Swap variant include its SPs. 1102 1.3.2.2 snj */ 1103 1.3.2.2 snj /* if_ipsec_update_variant() does not fail when delete SP only. */ 1104 1.3.2.2 snj (void)if_ipsec_update_variant(sc, nvar, nullvar); 1105 1.3.2.2 snj 1106 1.3.2.2 snj mutex_exit(&sc->ipsec_lock); 1107 1.3.2.2 snj 1108 1.3.2.2 snj /* 1109 1.3.2.2 snj * (2-4) Cleanup last configurations. 1110 1.3.2.2 snj */ 1111 1.3.2.2 snj if (if_ipsec_variant_is_configured(ovar)) 1112 1.3.2.2 snj if_ipsec_encap_detach(ovar); 1113 1.3.2.2 snj encap_lock_exit(); 1114 1.3.2.2 snj 1115 1.3.2.2 snj sockaddr_free(osrc); 1116 1.3.2.2 snj sockaddr_free(odst); 1117 1.3.2.2 snj kmem_free(ovar, sizeof(*ovar)); 1118 1.3.2.2 snj kmem_free(nullvar, sizeof(*nullvar)); 1119 1.3.2.2 snj } 1120 1.3.2.2 snj 1121 1.3.2.2 snj /* 1122 1.3.2.2 snj * Check IFF_NAT_T and IFF_FWD_IPV6 flags, therefore update SPs if needed. 1123 1.3.2.2 snj * (1) check 1124 1.3.2.2 snj * (1-1) Check flags are changed. 1125 1.3.2.2 snj * (1-2) Check current src and dst address pair. If they are null, 1126 1.3.2.2 snj * that means the ipsec(4) I/F is deletetunnel'ed, so it is 1127 1.3.2.2 snj * not needed to update. 1128 1.3.2.2 snj * (2) update 1129 1.3.2.2 snj * (2-1) Create variant for new SPs. 1130 1.3.2.2 snj * (2-2) Create temporary "null" variant used to avoid to access 1131 1.3.2.2 snj * dangling variant while SPs are deleted and added. 1132 1.3.2.2 snj * NOTE: 1133 1.3.2.2 snj * There is the same problem as if_ipsec_delete_tunnel(). 1134 1.3.2.2 snj * (2-3) Swap variant include its SPs. 1135 1.3.2.2 snj * (2-4) Cleanup unused configurations. 1136 1.3.2.2 snj * NOTE: use the same encap_cookies. 1137 1.3.2.2 snj */ 1138 1.3.2.2 snj static int 1139 1.3.2.2 snj if_ipsec_ensure_flags(struct ifnet *ifp, short oflags) 1140 1.3.2.2 snj { 1141 1.3.2.2 snj struct ipsec_softc *sc = ifp->if_softc; 1142 1.3.2.2 snj struct ipsec_variant *ovar, *nvar, *nullvar; 1143 1.3.2.2 snj int error; 1144 1.3.2.2 snj 1145 1.3.2.2 snj /* 1146 1.3.2.2 snj * (1) Check flags are changed. 1147 1.3.2.2 snj */ 1148 1.3.2.2 snj if ((oflags & (IFF_NAT_T|IFF_FWD_IPV6)) == 1149 1.3.2.2 snj (ifp->if_flags & (IFF_NAT_T|IFF_FWD_IPV6))) 1150 1.3.2.2 snj return 0; /* flags not changed. */ 1151 1.3.2.2 snj 1152 1.3.2.2 snj error = encap_lock_enter(); 1153 1.3.2.2 snj if (error) 1154 1.3.2.2 snj return error; 1155 1.3.2.2 snj 1156 1.3.2.2 snj nvar = kmem_zalloc(sizeof(*nvar), KM_SLEEP); 1157 1.3.2.2 snj nullvar = kmem_zalloc(sizeof(*nullvar), KM_SLEEP); 1158 1.3.2.2 snj 1159 1.3.2.2 snj mutex_enter(&sc->ipsec_lock); 1160 1.3.2.2 snj 1161 1.3.2.2 snj ovar = sc->ipsec_var; 1162 1.3.2.2 snj /* 1163 1.3.2.2 snj * (1-2) Check current src and dst address pair. 1164 1.3.2.2 snj */ 1165 1.3.2.2 snj if (if_ipsec_variant_is_unconfigured(ovar)) { 1166 1.3.2.2 snj /* nothing to do */ 1167 1.3.2.2 snj mutex_exit(&sc->ipsec_lock); 1168 1.3.2.2 snj return 0; 1169 1.3.2.2 snj } 1170 1.3.2.2 snj 1171 1.3.2.2 snj /* 1172 1.3.2.2 snj * (2-1) Create variant for new SPs. 1173 1.3.2.2 snj */ 1174 1.3.2.2 snj if_ipsec_copy_variant(nvar, ovar); 1175 1.3.2.2 snj psref_target_init(&nvar->iv_psref, iv_psref_class); 1176 1.3.2.2 snj /* 1177 1.3.2.2 snj * (2-2) Create temporary "null" variant used to avoid to access 1178 1.3.2.2 snj * dangling variant while SPs are deleted and added. 1179 1.3.2.2 snj */ 1180 1.3.2.2 snj if_ipsec_copy_variant(nullvar, ovar); 1181 1.3.2.2 snj if_ipsec_clear_config(nullvar); 1182 1.3.2.2 snj psref_target_init(&nullvar->iv_psref, iv_psref_class); 1183 1.3.2.2 snj membar_producer(); 1184 1.3.2.2 snj /* 1185 1.3.2.2 snj * (2-3) Swap variant include its SPs. 1186 1.3.2.2 snj */ 1187 1.3.2.2 snj error = if_ipsec_update_variant(sc, nvar, nullvar); 1188 1.3.2.2 snj 1189 1.3.2.2 snj mutex_exit(&sc->ipsec_lock); 1190 1.3.2.2 snj encap_lock_exit(); 1191 1.3.2.2 snj 1192 1.3.2.2 snj /* 1193 1.3.2.2 snj * (2-4) Cleanup unused configurations. 1194 1.3.2.2 snj */ 1195 1.3.2.2 snj if (!error) 1196 1.3.2.2 snj kmem_free(ovar, sizeof(*ovar)); 1197 1.3.2.2 snj else 1198 1.3.2.2 snj kmem_free(nvar, sizeof(*ovar)); 1199 1.3.2.2 snj kmem_free(nullvar, sizeof(*nullvar)); 1200 1.3.2.2 snj 1201 1.3.2.2 snj return error; 1202 1.3.2.2 snj } 1203 1.3.2.2 snj 1204 1.3.2.2 snj /* 1205 1.3.2.2 snj * SPD management 1206 1.3.2.2 snj */ 1207 1.3.2.2 snj 1208 1.3.2.2 snj /* 1209 1.3.2.2 snj * Share SP set with other NAT-T ipsec(4) I/F(s). 1210 1.3.2.2 snj * Return 1, when "var" shares SP set. 1211 1.3.2.2 snj * Return 0, when "var" cannot share SP set. 1212 1.3.2.2 snj * 1213 1.3.2.2 snj * NOTE: 1214 1.3.2.2 snj * if_ipsec_share_sp() and if_ipsec_unshare_sp() would require global lock 1215 1.3.2.2 snj * to exclude other ipsec(4) I/Fs set_tunnel/delete_tunnel. E.g. when ipsec0 1216 1.3.2.2 snj * and ipsec1 can share SP set, running ipsec0's set_tunnel and ipsec1's 1217 1.3.2.2 snj * set_tunnel causes race. 1218 1.3.2.2 snj * Currently, (fortunately) encap_lock works as this global lock. 1219 1.3.2.2 snj */ 1220 1.3.2.2 snj static int 1221 1.3.2.2 snj if_ipsec_share_sp(struct ipsec_variant *var) 1222 1.3.2.2 snj { 1223 1.3.2.2 snj struct ipsec_softc *sc = var->iv_softc; 1224 1.3.2.2 snj struct ipsec_softc *sc2; 1225 1.3.2.2 snj struct ipsec_variant *var2; 1226 1.3.2.2 snj struct psref psref; 1227 1.3.2.2 snj 1228 1.3.2.2 snj KASSERT(encap_lock_held()); 1229 1.3.2.2 snj KASSERT(var->iv_psrc != NULL && var->iv_pdst != NULL); 1230 1.3.2.2 snj 1231 1.3.2.2 snj mutex_enter(&ipsec_softcs.lock); 1232 1.3.2.2 snj LIST_FOREACH(sc2, &ipsec_softcs.list, ipsec_list) { 1233 1.3.2.2 snj if (sc2 == sc) 1234 1.3.2.2 snj continue; 1235 1.3.2.2 snj var2 = if_ipsec_getref_variant(sc2, &psref); 1236 1.3.2.2 snj if (if_ipsec_variant_is_unconfigured(var2)) { 1237 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 1238 1.3.2.2 snj continue; 1239 1.3.2.2 snj } 1240 1.3.2.2 snj if (sockaddr_cmp(var2->iv_pdst, var->iv_pdst) != 0 || 1241 1.3.2.2 snj sockaddr_cmp(var2->iv_psrc, var->iv_psrc) != 0) { 1242 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 1243 1.3.2.2 snj continue; 1244 1.3.2.2 snj } 1245 1.3.2.2 snj 1246 1.3.2.2 snj break; 1247 1.3.2.2 snj } 1248 1.3.2.2 snj mutex_exit(&ipsec_softcs.lock); 1249 1.3.2.2 snj if (sc2 == NULL) 1250 1.3.2.2 snj return 0; /* not shared */ 1251 1.3.2.2 snj 1252 1.3.2.2 snj IV_SP_IN(var) = IV_SP_IN(var2); 1253 1.3.2.2 snj IV_SP_IN6(var) = IV_SP_IN6(var2); 1254 1.3.2.2 snj IV_SP_OUT(var) = IV_SP_OUT(var2); 1255 1.3.2.2 snj IV_SP_OUT6(var) = IV_SP_OUT6(var2); 1256 1.3.2.2 snj 1257 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 1258 1.3.2.2 snj return 1; /* shared */ 1259 1.3.2.2 snj } 1260 1.3.2.2 snj 1261 1.3.2.2 snj /* 1262 1.3.2.2 snj * Unshare SP set with other NAT-T ipsec(4) I/F(s). 1263 1.3.2.2 snj * Return 1, when "var" shared SP set, and then unshare them. 1264 1.3.2.2 snj * Return 0, when "var" did not share SP set. 1265 1.3.2.2 snj * 1266 1.3.2.2 snj * NOTE: 1267 1.3.2.2 snj * See if_ipsec_share_sp()'s note. 1268 1.3.2.2 snj */ 1269 1.3.2.2 snj static int 1270 1.3.2.2 snj if_ipsec_unshare_sp(struct ipsec_variant *var) 1271 1.3.2.2 snj { 1272 1.3.2.2 snj struct ipsec_softc *sc = var->iv_softc; 1273 1.3.2.2 snj struct ipsec_softc *sc2; 1274 1.3.2.2 snj struct ipsec_variant *var2; 1275 1.3.2.2 snj struct psref psref; 1276 1.3.2.2 snj 1277 1.3.2.2 snj KASSERT(encap_lock_held()); 1278 1.3.2.2 snj 1279 1.3.2.2 snj if (!var->iv_pdst || !var->iv_psrc) 1280 1.3.2.2 snj return 0; 1281 1.3.2.2 snj 1282 1.3.2.2 snj mutex_enter(&ipsec_softcs.lock); 1283 1.3.2.2 snj LIST_FOREACH(sc2, &ipsec_softcs.list, ipsec_list) { 1284 1.3.2.2 snj if (sc2 == sc) 1285 1.3.2.2 snj continue; 1286 1.3.2.2 snj var2 = if_ipsec_getref_variant(sc2, &psref); 1287 1.3.2.2 snj if (!var2->iv_pdst || !var2->iv_psrc) { 1288 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 1289 1.3.2.2 snj continue; 1290 1.3.2.2 snj } 1291 1.3.2.2 snj if (sockaddr_cmp(var2->iv_pdst, var->iv_pdst) != 0 || 1292 1.3.2.2 snj sockaddr_cmp(var2->iv_psrc, var->iv_psrc) != 0) { 1293 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 1294 1.3.2.2 snj continue; 1295 1.3.2.2 snj } 1296 1.3.2.2 snj 1297 1.3.2.2 snj break; 1298 1.3.2.2 snj } 1299 1.3.2.2 snj mutex_exit(&ipsec_softcs.lock); 1300 1.3.2.2 snj if (sc2 == NULL) 1301 1.3.2.2 snj return 0; /* not shared */ 1302 1.3.2.2 snj 1303 1.3.2.2 snj IV_SP_IN(var) = NULL; 1304 1.3.2.2 snj IV_SP_IN6(var) = NULL; 1305 1.3.2.2 snj IV_SP_OUT(var) = NULL; 1306 1.3.2.2 snj IV_SP_OUT6(var) = NULL; 1307 1.3.2.2 snj if_ipsec_putref_variant(var2, &psref); 1308 1.3.2.2 snj return 1; /* shared */ 1309 1.3.2.2 snj } 1310 1.3.2.2 snj 1311 1.3.2.2 snj static inline void 1312 1.3.2.2 snj if_ipsec_add_mbuf(struct mbuf *m0, void *data, size_t len) 1313 1.3.2.2 snj { 1314 1.3.2.2 snj struct mbuf *m; 1315 1.3.2.2 snj 1316 1.3.2.2 snj MGET(m, M_WAITOK | M_ZERO, MT_DATA); 1317 1.3.2.2 snj m->m_len = PFKEY_ALIGN8(len); 1318 1.3.2.2 snj m_copyback(m, 0, len, data); 1319 1.3.2.2 snj m_cat(m0, m); 1320 1.3.2.2 snj } 1321 1.3.2.2 snj 1322 1.3.2.2 snj static inline void 1323 1.3.2.2 snj if_ipsec_add_pad(struct mbuf *m0, size_t len) 1324 1.3.2.2 snj { 1325 1.3.2.2 snj struct mbuf *m; 1326 1.3.2.2 snj 1327 1.3.2.2 snj if (len == 0) 1328 1.3.2.2 snj return; 1329 1.3.2.2 snj 1330 1.3.2.2 snj MGET(m, M_WAITOK | M_ZERO, MT_DATA); 1331 1.3.2.2 snj m->m_len = len; 1332 1.3.2.2 snj m_cat(m0, m); 1333 1.3.2.2 snj } 1334 1.3.2.2 snj 1335 1.3.2.2 snj static inline size_t 1336 1.3.2.2 snj if_ipsec_set_sadb_addr(struct sadb_address *saaddr, struct sockaddr *addr, 1337 1.3.2.2 snj int proto, uint16_t exttype) 1338 1.3.2.2 snj { 1339 1.3.2.2 snj size_t size; 1340 1.3.2.2 snj 1341 1.3.2.2 snj KASSERT(saaddr != NULL); 1342 1.3.2.2 snj KASSERT(addr != NULL); 1343 1.3.2.2 snj 1344 1.3.2.2 snj size = sizeof(*saaddr) + PFKEY_ALIGN8(addr->sa_len); 1345 1.3.2.2 snj saaddr->sadb_address_len = PFKEY_UNIT64(size); 1346 1.3.2.2 snj saaddr->sadb_address_exttype = exttype; 1347 1.3.2.2 snj saaddr->sadb_address_proto = proto; 1348 1.3.2.2 snj switch (addr->sa_family) { 1349 1.3.2.2 snj #ifdef INET 1350 1.3.2.2 snj case AF_INET: 1351 1.3.2.2 snj saaddr->sadb_address_prefixlen = sizeof(struct in_addr) << 3; 1352 1.3.2.2 snj break; 1353 1.3.2.2 snj #endif /* INET */ 1354 1.3.2.2 snj #ifdef INET6 1355 1.3.2.2 snj case AF_INET6: 1356 1.3.2.2 snj saaddr->sadb_address_prefixlen = sizeof(struct in6_addr) << 3; 1357 1.3.2.2 snj break; 1358 1.3.2.2 snj #endif /* INET6 */ 1359 1.3.2.2 snj default: 1360 1.3.2.2 snj log(LOG_DEBUG, 1361 1.3.2.2 snj "%s: Invalid address family: %d.\n", 1362 1.3.2.2 snj __func__, addr->sa_family); 1363 1.3.2.2 snj break; 1364 1.3.2.2 snj } 1365 1.3.2.2 snj saaddr->sadb_address_reserved = 0; 1366 1.3.2.2 snj 1367 1.3.2.2 snj return size; 1368 1.3.2.2 snj } 1369 1.3.2.2 snj 1370 1.3.2.2 snj static inline size_t 1371 1.3.2.2 snj if_ipsec_set_sadb_src(struct sadb_address *sasrc, struct sockaddr *src, 1372 1.3.2.2 snj int proto) 1373 1.3.2.2 snj { 1374 1.3.2.2 snj 1375 1.3.2.2 snj return if_ipsec_set_sadb_addr(sasrc, src, proto, 1376 1.3.2.2 snj SADB_EXT_ADDRESS_SRC); 1377 1.3.2.2 snj } 1378 1.3.2.2 snj 1379 1.3.2.2 snj static inline size_t 1380 1.3.2.2 snj if_ipsec_set_sadb_dst(struct sadb_address *sadst, struct sockaddr *dst, 1381 1.3.2.2 snj int proto) 1382 1.3.2.2 snj { 1383 1.3.2.2 snj 1384 1.3.2.2 snj return if_ipsec_set_sadb_addr(sadst, dst, proto, 1385 1.3.2.2 snj SADB_EXT_ADDRESS_DST); 1386 1.3.2.2 snj } 1387 1.3.2.2 snj 1388 1.3.2.2 snj static inline size_t 1389 1.3.2.2 snj if_ipsec_set_sadb_x_policy(struct sadb_x_policy *xpl, 1390 1.3.2.2 snj struct sadb_x_ipsecrequest *xisr, uint16_t policy, uint8_t dir, uint32_t id, 1391 1.3.2.2 snj uint8_t level) 1392 1.3.2.2 snj { 1393 1.3.2.2 snj size_t size; 1394 1.3.2.2 snj 1395 1.3.2.2 snj KASSERT(policy != IPSEC_POLICY_IPSEC || xisr != NULL); 1396 1.3.2.2 snj 1397 1.3.2.2 snj size = sizeof(*xpl); 1398 1.3.2.2 snj if (policy == IPSEC_POLICY_IPSEC) { 1399 1.3.2.2 snj size += PFKEY_ALIGN8(sizeof(*xisr)); 1400 1.3.2.2 snj } 1401 1.3.2.2 snj xpl->sadb_x_policy_len = PFKEY_UNIT64(size); 1402 1.3.2.2 snj xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1403 1.3.2.2 snj xpl->sadb_x_policy_type = policy; 1404 1.3.2.2 snj xpl->sadb_x_policy_dir = dir; 1405 1.3.2.2 snj xpl->sadb_x_policy_reserved = 0; 1406 1.3.2.2 snj xpl->sadb_x_policy_id = id; 1407 1.3.2.2 snj xpl->sadb_x_policy_reserved2 = 0; 1408 1.3.2.2 snj 1409 1.3.2.2 snj if (policy == IPSEC_POLICY_IPSEC) { 1410 1.3.2.2 snj xisr->sadb_x_ipsecrequest_len = PFKEY_ALIGN8(sizeof(*xisr)); 1411 1.3.2.2 snj xisr->sadb_x_ipsecrequest_proto = IPPROTO_ESP; 1412 1.3.2.2 snj xisr->sadb_x_ipsecrequest_mode = IPSEC_MODE_TRANSPORT; 1413 1.3.2.2 snj xisr->sadb_x_ipsecrequest_level = level; 1414 1.3.2.2 snj xisr->sadb_x_ipsecrequest_reqid = key_newreqid(); 1415 1.3.2.2 snj } 1416 1.3.2.2 snj 1417 1.3.2.2 snj return size; 1418 1.3.2.2 snj } 1419 1.3.2.2 snj 1420 1.3.2.2 snj static inline void 1421 1.3.2.2 snj if_ipsec_set_sadb_msg(struct sadb_msg *msg, uint16_t extlen, uint8_t msgtype) 1422 1.3.2.2 snj { 1423 1.3.2.2 snj 1424 1.3.2.2 snj KASSERT(msg != NULL); 1425 1.3.2.2 snj 1426 1.3.2.2 snj msg->sadb_msg_version = PF_KEY_V2; 1427 1.3.2.2 snj msg->sadb_msg_type = msgtype; 1428 1.3.2.2 snj msg->sadb_msg_errno = 0; 1429 1.3.2.2 snj msg->sadb_msg_satype = SADB_SATYPE_UNSPEC; 1430 1.3.2.2 snj msg->sadb_msg_len = PFKEY_UNIT64(sizeof(*msg)) + extlen; 1431 1.3.2.2 snj msg->sadb_msg_reserved = 0; 1432 1.3.2.2 snj msg->sadb_msg_seq = 0; /* XXXX */ 1433 1.3.2.2 snj msg->sadb_msg_pid = 0; /* XXXX */ 1434 1.3.2.2 snj } 1435 1.3.2.2 snj 1436 1.3.2.2 snj static inline void 1437 1.3.2.2 snj if_ipsec_set_sadb_msg_add(struct sadb_msg *msg, uint16_t extlen) 1438 1.3.2.2 snj { 1439 1.3.2.2 snj 1440 1.3.2.2 snj if_ipsec_set_sadb_msg(msg, extlen, SADB_X_SPDADD); 1441 1.3.2.2 snj } 1442 1.3.2.2 snj 1443 1.3.2.2 snj static inline void 1444 1.3.2.2 snj if_ipsec_set_sadb_msg_del(struct sadb_msg *msg, uint16_t extlen) 1445 1.3.2.2 snj { 1446 1.3.2.2 snj 1447 1.3.2.2 snj if_ipsec_set_sadb_msg(msg, extlen, SADB_X_SPDDELETE2); 1448 1.3.2.2 snj } 1449 1.3.2.2 snj 1450 1.3.2.2 snj static int 1451 1.3.2.2 snj if_ipsec_set_addr_port(struct sockaddr *addrport, struct sockaddr *addr, 1452 1.3.2.2 snj in_port_t port) 1453 1.3.2.2 snj { 1454 1.3.2.2 snj int error = 0; 1455 1.3.2.2 snj 1456 1.3.2.2 snj sockaddr_copy(addrport, addr->sa_len, addr); 1457 1.3.2.2 snj 1458 1.3.2.2 snj switch (addr->sa_family) { 1459 1.3.2.2 snj #ifdef INET 1460 1.3.2.2 snj case AF_INET: { 1461 1.3.2.2 snj struct sockaddr_in *sin = satosin(addrport); 1462 1.3.2.2 snj sin->sin_port = htons(port); 1463 1.3.2.2 snj break; 1464 1.3.2.2 snj } 1465 1.3.2.2 snj #endif /* INET */ 1466 1.3.2.2 snj #ifdef INET6 1467 1.3.2.2 snj case AF_INET6: { 1468 1.3.2.2 snj struct sockaddr_in6 *sin6 = satosin6(addrport); 1469 1.3.2.2 snj sin6->sin6_port = htons(port); 1470 1.3.2.2 snj break; 1471 1.3.2.2 snj } 1472 1.3.2.2 snj #endif /* INET6 */ 1473 1.3.2.2 snj default: 1474 1.3.2.2 snj log(LOG_DEBUG, 1475 1.3.2.2 snj "%s: Invalid address family: %d.\n", 1476 1.3.2.2 snj __func__, addr->sa_family); 1477 1.3.2.2 snj error = EINVAL; 1478 1.3.2.2 snj } 1479 1.3.2.2 snj 1480 1.3.2.2 snj return error; 1481 1.3.2.2 snj } 1482 1.3.2.2 snj 1483 1.3.2.2 snj static struct secpolicy * 1484 1.3.2.2 snj if_ipsec_add_sp0(struct sockaddr *src, in_port_t sport, 1485 1.3.2.2 snj struct sockaddr *dst, in_port_t dport, 1486 1.3.2.2 snj int dir, int proto, int level, u_int policy) 1487 1.3.2.2 snj { 1488 1.3.2.2 snj struct sadb_msg msg; 1489 1.3.2.2 snj struct sadb_address xsrc, xdst; 1490 1.3.2.2 snj struct sadb_x_policy xpl; 1491 1.3.2.2 snj struct sadb_x_ipsecrequest xisr; 1492 1.3.2.2 snj size_t size; 1493 1.3.2.2 snj size_t padlen; 1494 1.3.2.2 snj uint16_t ext_msg_len = 0; 1495 1.3.2.2 snj struct mbuf *m; 1496 1.3.2.2 snj 1497 1.3.2.2 snj memset(&msg, 0, sizeof(msg)); 1498 1.3.2.2 snj memset(&xsrc, 0, sizeof(xsrc)); 1499 1.3.2.2 snj memset(&xdst, 0, sizeof(xdst)); 1500 1.3.2.2 snj memset(&xpl, 0, sizeof(xpl)); 1501 1.3.2.2 snj memset(&xisr, 0, sizeof(xisr)); 1502 1.3.2.2 snj 1503 1.3.2.2 snj MGETHDR(m, M_WAITOK, MT_DATA); 1504 1.3.2.2 snj 1505 1.3.2.2 snj size = if_ipsec_set_sadb_src(&xsrc, src, proto); 1506 1.3.2.2 snj ext_msg_len += PFKEY_UNIT64(size); 1507 1.3.2.2 snj size = if_ipsec_set_sadb_dst(&xdst, dst, proto); 1508 1.3.2.2 snj ext_msg_len += PFKEY_UNIT64(size); 1509 1.3.2.2 snj size = if_ipsec_set_sadb_x_policy(&xpl, &xisr, policy, dir, 0, level); 1510 1.3.2.2 snj ext_msg_len += PFKEY_UNIT64(size); 1511 1.3.2.2 snj if_ipsec_set_sadb_msg_add(&msg, ext_msg_len); 1512 1.3.2.2 snj 1513 1.3.2.2 snj /* build PF_KEY message */ 1514 1.3.2.2 snj 1515 1.3.2.2 snj m->m_len = sizeof(msg); 1516 1.3.2.2 snj m_copyback(m, 0, sizeof(msg), &msg); 1517 1.3.2.2 snj 1518 1.3.2.2 snj if_ipsec_add_mbuf(m, &xsrc, sizeof(xsrc)); 1519 1.3.2.2 snj if (sport == 0) { 1520 1.3.2.2 snj if_ipsec_add_mbuf(m, src, src->sa_len); 1521 1.3.2.2 snj } else { 1522 1.3.2.2 snj struct sockaddr addrport; 1523 1.3.2.2 snj 1524 1.3.2.2 snj if_ipsec_set_addr_port(&addrport, src, sport); 1525 1.3.2.2 snj if_ipsec_add_mbuf(m, &addrport, addrport.sa_len); 1526 1.3.2.2 snj } 1527 1.3.2.2 snj padlen = PFKEY_UNUNIT64(xsrc.sadb_address_len) 1528 1.3.2.2 snj - (sizeof(xsrc) + PFKEY_ALIGN8(src->sa_len)); 1529 1.3.2.2 snj if_ipsec_add_pad(m, padlen); 1530 1.3.2.2 snj 1531 1.3.2.2 snj if_ipsec_add_mbuf(m, &xdst, sizeof(xdst)); 1532 1.3.2.2 snj if (dport == 0) { 1533 1.3.2.2 snj if_ipsec_add_mbuf(m, dst, dst->sa_len); 1534 1.3.2.2 snj } else { 1535 1.3.2.2 snj struct sockaddr addrport; 1536 1.3.2.2 snj 1537 1.3.2.2 snj if_ipsec_set_addr_port(&addrport, dst, dport); 1538 1.3.2.2 snj if_ipsec_add_mbuf(m, &addrport, addrport.sa_len); 1539 1.3.2.2 snj } 1540 1.3.2.2 snj padlen = PFKEY_UNUNIT64(xdst.sadb_address_len) 1541 1.3.2.2 snj - (sizeof(xdst) + PFKEY_ALIGN8(dst->sa_len)); 1542 1.3.2.2 snj if_ipsec_add_pad(m, padlen); 1543 1.3.2.2 snj 1544 1.3.2.2 snj if_ipsec_add_mbuf(m, &xpl, sizeof(xpl)); 1545 1.3.2.2 snj if (policy == IPSEC_POLICY_IPSEC) 1546 1.3.2.2 snj if_ipsec_add_mbuf(m, &xisr, sizeof(xisr)); 1547 1.3.2.2 snj 1548 1.3.2.2 snj /* key_kpi_spdadd() has already done KEY_SP_REF(). */ 1549 1.3.2.2 snj return key_kpi_spdadd(m); 1550 1.3.2.2 snj } 1551 1.3.2.2 snj 1552 1.3.2.2 snj static int 1553 1.3.2.2 snj if_ipsec_add_sp(struct ipsec_variant *var, 1554 1.3.2.2 snj struct sockaddr *src, in_port_t sport, 1555 1.3.2.2 snj struct sockaddr *dst, in_port_t dport) 1556 1.3.2.2 snj { 1557 1.3.2.2 snj struct ipsec_softc *sc = var->iv_softc; 1558 1.3.2.2 snj int level; 1559 1.3.2.2 snj u_int v6policy; 1560 1.3.2.2 snj 1561 1.3.2.2 snj /* 1562 1.3.2.2 snj * must delete sp before add it. 1563 1.3.2.2 snj */ 1564 1.3.2.2 snj KASSERT(IV_SP_IN(var) == NULL); 1565 1.3.2.2 snj KASSERT(IV_SP_OUT(var) == NULL); 1566 1.3.2.2 snj KASSERT(IV_SP_IN6(var) == NULL); 1567 1.3.2.2 snj KASSERT(IV_SP_OUT6(var) == NULL); 1568 1.3.2.2 snj 1569 1.3.2.2 snj /* 1570 1.3.2.2 snj * can be shared? 1571 1.3.2.2 snj */ 1572 1.3.2.2 snj if (if_ipsec_share_sp(var)) 1573 1.3.2.2 snj return 0; 1574 1.3.2.2 snj 1575 1.3.2.2 snj if (if_ipsec_nat_t(sc)) 1576 1.3.2.2 snj level = IPSEC_LEVEL_REQUIRE; 1577 1.3.2.2 snj else 1578 1.3.2.2 snj level = IPSEC_LEVEL_UNIQUE; 1579 1.3.2.2 snj 1580 1.3.2.2 snj if (if_ipsec_fwd_ipv6(sc)) 1581 1.3.2.2 snj v6policy = IPSEC_POLICY_IPSEC; 1582 1.3.2.2 snj else 1583 1.3.2.2 snj v6policy = IPSEC_POLICY_DISCARD; 1584 1.3.2.2 snj 1585 1.3.2.2 snj IV_SP_IN(var) = if_ipsec_add_sp0(dst, dport, src, sport, 1586 1.3.2.2 snj IPSEC_DIR_INBOUND, IPPROTO_IPIP, level, IPSEC_POLICY_IPSEC); 1587 1.3.2.2 snj if (IV_SP_IN(var) == NULL) 1588 1.3.2.2 snj goto fail; 1589 1.3.2.2 snj IV_SP_OUT(var) = if_ipsec_add_sp0(src, sport, dst, dport, 1590 1.3.2.2 snj IPSEC_DIR_OUTBOUND, IPPROTO_IPIP, level, IPSEC_POLICY_IPSEC); 1591 1.3.2.2 snj if (IV_SP_OUT(var) == NULL) 1592 1.3.2.2 snj goto fail; 1593 1.3.2.2 snj IV_SP_IN6(var) = if_ipsec_add_sp0(dst, dport, src, sport, 1594 1.3.2.2 snj IPSEC_DIR_INBOUND, IPPROTO_IPV6, level, v6policy); 1595 1.3.2.2 snj if (IV_SP_IN6(var) == NULL) 1596 1.3.2.2 snj goto fail; 1597 1.3.2.2 snj IV_SP_OUT6(var) = if_ipsec_add_sp0(src, sport, dst, dport, 1598 1.3.2.2 snj IPSEC_DIR_OUTBOUND, IPPROTO_IPV6, level, v6policy); 1599 1.3.2.2 snj if (IV_SP_OUT6(var) == NULL) 1600 1.3.2.2 snj goto fail; 1601 1.3.2.2 snj 1602 1.3.2.2 snj return 0; 1603 1.3.2.2 snj 1604 1.3.2.2 snj fail: 1605 1.3.2.2 snj if (IV_SP_IN6(var) != NULL) { 1606 1.3.2.2 snj if_ipsec_del_sp0(IV_SP_IN6(var)); 1607 1.3.2.2 snj IV_SP_IN6(var) = NULL; 1608 1.3.2.2 snj } 1609 1.3.2.2 snj if (IV_SP_OUT(var) != NULL) { 1610 1.3.2.2 snj if_ipsec_del_sp0(IV_SP_OUT(var)); 1611 1.3.2.2 snj IV_SP_OUT(var) = NULL; 1612 1.3.2.2 snj } 1613 1.3.2.2 snj if (IV_SP_IN(var) != NULL) { 1614 1.3.2.2 snj if_ipsec_del_sp0(IV_SP_IN(var)); 1615 1.3.2.2 snj IV_SP_IN(var) = NULL; 1616 1.3.2.2 snj } 1617 1.3.2.2 snj 1618 1.3.2.2 snj return EEXIST; 1619 1.3.2.2 snj } 1620 1.3.2.2 snj 1621 1.3.2.2 snj static int 1622 1.3.2.2 snj if_ipsec_del_sp0(struct secpolicy *sp) 1623 1.3.2.2 snj { 1624 1.3.2.2 snj struct sadb_msg msg; 1625 1.3.2.2 snj struct sadb_x_policy xpl; 1626 1.3.2.2 snj size_t size; 1627 1.3.2.2 snj uint16_t ext_msg_len = 0; 1628 1.3.2.2 snj int error; 1629 1.3.2.2 snj struct mbuf *m; 1630 1.3.2.2 snj 1631 1.3.2.2 snj if (sp == NULL) 1632 1.3.2.2 snj return 0; 1633 1.3.2.2 snj 1634 1.3.2.2 snj memset(&msg, 0, sizeof(msg)); 1635 1.3.2.2 snj memset(&xpl, 0, sizeof(xpl)); 1636 1.3.2.2 snj 1637 1.3.2.2 snj MGETHDR(m, M_WAITOK, MT_DATA); 1638 1.3.2.2 snj 1639 1.3.2.2 snj size = if_ipsec_set_sadb_x_policy(&xpl, NULL, 0, 0, sp->id, 0); 1640 1.3.2.2 snj ext_msg_len += PFKEY_UNIT64(size); 1641 1.3.2.2 snj 1642 1.3.2.2 snj if_ipsec_set_sadb_msg_del(&msg, ext_msg_len); 1643 1.3.2.2 snj 1644 1.3.2.2 snj m->m_len = sizeof(msg); 1645 1.3.2.2 snj m_copyback(m, 0, sizeof(msg), &msg); 1646 1.3.2.2 snj 1647 1.3.2.2 snj if_ipsec_add_mbuf(m, &xpl, sizeof(xpl)); 1648 1.3.2.2 snj 1649 1.3.2.2 snj /* unreference correspond to key_kpi_spdadd(). */ 1650 1.3.2.2 snj KEY_SP_UNREF(&sp); 1651 1.3.2.2 snj error = key_kpi_spddelete2(m); 1652 1.3.2.2 snj if (error != 0) { 1653 1.3.2.2 snj log(LOG_ERR, "%s: cannot delete SP(ID=%u) (error=%d).\n", 1654 1.3.2.2 snj __func__, sp->id, error); 1655 1.3.2.2 snj } 1656 1.3.2.2 snj return error; 1657 1.3.2.2 snj } 1658 1.3.2.2 snj 1659 1.3.2.2 snj static void 1660 1.3.2.2 snj if_ipsec_del_sp(struct ipsec_variant *var) 1661 1.3.2.2 snj { 1662 1.3.2.2 snj 1663 1.3.2.2 snj /* are the SPs shared? */ 1664 1.3.2.2 snj if (if_ipsec_unshare_sp(var)) 1665 1.3.2.2 snj return; 1666 1.3.2.2 snj 1667 1.3.2.2 snj (void)if_ipsec_del_sp0(IV_SP_OUT(var)); 1668 1.3.2.2 snj (void)if_ipsec_del_sp0(IV_SP_IN(var)); 1669 1.3.2.2 snj (void)if_ipsec_del_sp0(IV_SP_OUT6(var)); 1670 1.3.2.2 snj (void)if_ipsec_del_sp0(IV_SP_IN6(var)); 1671 1.3.2.2 snj IV_SP_IN(var) = NULL; 1672 1.3.2.2 snj IV_SP_IN6(var) = NULL; 1673 1.3.2.2 snj IV_SP_OUT(var) = NULL; 1674 1.3.2.2 snj IV_SP_OUT6(var) = NULL; 1675 1.3.2.2 snj } 1676 1.3.2.2 snj 1677 1.3.2.2 snj static int 1678 1.3.2.2 snj if_ipsec_replace_sp(struct ipsec_softc *sc, struct ipsec_variant *ovar, 1679 1.3.2.2 snj struct ipsec_variant *nvar) 1680 1.3.2.2 snj { 1681 1.3.2.2 snj in_port_t src_port = 0; 1682 1.3.2.2 snj in_port_t dst_port = 0; 1683 1.3.2.2 snj struct sockaddr *src; 1684 1.3.2.2 snj struct sockaddr *dst; 1685 1.3.2.2 snj int error = 0; 1686 1.3.2.2 snj 1687 1.3.2.2 snj KASSERT(mutex_owned(&sc->ipsec_lock)); 1688 1.3.2.2 snj 1689 1.3.2.2 snj if_ipsec_del_sp(ovar); 1690 1.3.2.2 snj 1691 1.3.2.2 snj src = nvar->iv_psrc; 1692 1.3.2.2 snj dst = nvar->iv_pdst; 1693 1.3.2.2 snj if (if_ipsec_nat_t(sc)) { 1694 1.3.2.2 snj /* NAT-T enabled */ 1695 1.3.2.2 snj src_port = nvar->iv_sport; 1696 1.3.2.2 snj dst_port = nvar->iv_dport; 1697 1.3.2.2 snj } 1698 1.3.2.2 snj if (src && dst) 1699 1.3.2.2 snj error = if_ipsec_add_sp(nvar, src, src_port, dst, dst_port); 1700 1.3.2.2 snj 1701 1.3.2.2 snj return error; 1702 1.3.2.2 snj } 1703 1.3.2.2 snj 1704 1.3.2.2 snj /* 1705 1.3.2.2 snj * ipsec_variant and its SPs update API. 1706 1.3.2.2 snj * 1707 1.3.2.2 snj * Assumption: 1708 1.3.2.2 snj * reader side dereferences sc->ipsec_var in reader critical section only, 1709 1.3.2.2 snj * that is, all of reader sides do not reader the sc->ipsec_var after 1710 1.3.2.2 snj * pserialize_perform(). 1711 1.3.2.2 snj */ 1712 1.3.2.2 snj static int 1713 1.3.2.2 snj if_ipsec_update_variant(struct ipsec_softc *sc, struct ipsec_variant *nvar, 1714 1.3.2.2 snj struct ipsec_variant *nullvar) 1715 1.3.2.2 snj { 1716 1.3.2.2 snj struct ifnet *ifp = &sc->ipsec_if; 1717 1.3.2.2 snj struct ipsec_variant *ovar = sc->ipsec_var; 1718 1.3.2.2 snj int error; 1719 1.3.2.2 snj 1720 1.3.2.2 snj KASSERT(mutex_owned(&sc->ipsec_lock)); 1721 1.3.2.2 snj 1722 1.3.2.2 snj /* 1723 1.3.2.2 snj * To keep consistency between ipsec(4) I/F settings and SPs, 1724 1.3.2.2 snj * we stop packet processing while replacing SPs, that is, we set 1725 1.3.2.2 snj * "null" config variant to sc->ipsec_var. 1726 1.3.2.2 snj */ 1727 1.3.2.2 snj sc->ipsec_var = nullvar; 1728 1.3.2.2 snj pserialize_perform(ipsec_psz); 1729 1.3.2.2 snj psref_target_destroy(&ovar->iv_psref, iv_psref_class); 1730 1.3.2.2 snj 1731 1.3.2.2 snj error = if_ipsec_replace_sp(sc, ovar, nvar); 1732 1.3.2.2 snj if (!error) 1733 1.3.2.2 snj sc->ipsec_var = nvar; 1734 1.3.2.2 snj else { 1735 1.3.2.2 snj sc->ipsec_var = ovar; /* rollback */ 1736 1.3.2.2 snj psref_target_init(&ovar->iv_psref, iv_psref_class); 1737 1.3.2.2 snj } 1738 1.3.2.2 snj 1739 1.3.2.2 snj pserialize_perform(ipsec_psz); 1740 1.3.2.2 snj psref_target_destroy(&nullvar->iv_psref, iv_psref_class); 1741 1.3.2.2 snj 1742 1.3.2.2 snj if (if_ipsec_variant_is_configured(sc->ipsec_var)) 1743 1.3.2.2 snj ifp->if_flags |= IFF_RUNNING; 1744 1.3.2.2 snj else 1745 1.3.2.2 snj ifp->if_flags &= ~IFF_RUNNING; 1746 1.3.2.2 snj 1747 1.3.2.2 snj return error; 1748 1.3.2.2 snj } 1749
Indexes created Sat Sep 27 14:09:57 GMT 2025