1 /* $NetBSD: mpls_proto.c,v 1.31 2017/09/21 07:15:35 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Mihai Chelaru <kefren@NetBSD.org> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: mpls_proto.c,v 1.31 2017/09/21 07:15:35 ozaki-r Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_inet.h" 37 #include "opt_mbuftrace.h" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/socket.h> 42 #include <sys/protosw.h> 43 #include <sys/domain.h> 44 #include <sys/socketvar.h> 45 #include <sys/sysctl.h> 46 47 #include <net/route.h> 48 49 #include <netmpls/mpls.h> 50 #include <netmpls/mpls_var.h> 51 52 struct ifqueue mplsintrq; 53 54 static int mpls_attach(struct socket *, int); 55 static void sysctl_net_mpls_setup(struct sysctllog **); 56 57 #ifdef MBUFTRACE 58 struct mowner mpls_owner = MOWNER_INIT("MPLS", ""); 59 #endif 60 61 int mpls_defttl = 255; 62 int mpls_mapttl_inet = 1; 63 int mpls_mapttl_inet6 = 1; 64 int mpls_icmp_respond = 0; 65 int mpls_forwarding = 0; 66 int mpls_frame_accept = 0; 67 int mpls_mapprec_inet = 1; 68 int mpls_mapclass_inet6 = 1; 69 int mpls_rfc4182 = 1; 70 71 void mpls_init(void) 72 { 73 #ifdef MBUFTRACE 74 MOWNER_ATTACH(&mpls_owner); 75 #endif 76 memset(&mplsintrq, 0, sizeof(mplsintrq)); 77 mplsintrq.ifq_maxlen = 256; 78 IFQ_LOCK_INIT(&mplsintrq); 79 80 sysctl_net_mpls_setup(NULL); 81 } 82 83 static int 84 mpls_attach(struct socket *so, int proto) 85 { 86 int error = EOPNOTSUPP; 87 88 sosetlock(so); 89 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 90 error = soreserve(so, 8192, 8192); 91 } 92 return error; 93 } 94 95 static void 96 mpls_detach(struct socket *so) 97 { 98 } 99 100 static int 101 mpls_accept(struct socket *so, struct sockaddr *nam) 102 { 103 KASSERT(solocked(so)); 104 105 return EOPNOTSUPP; 106 } 107 108 static int 109 mpls_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 110 { 111 KASSERT(solocked(so)); 112 113 return EOPNOTSUPP; 114 } 115 116 static int 117 mpls_listen(struct socket *so, struct lwp *l) 118 { 119 KASSERT(solocked(so)); 120 121 return EOPNOTSUPP; 122 } 123 124 static int 125 mpls_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 126 { 127 KASSERT(solocked(so)); 128 129 return EOPNOTSUPP; 130 } 131 132 static int 133 mpls_connect2(struct socket *so, struct socket *so2) 134 { 135 KASSERT(solocked(so)); 136 137 return EOPNOTSUPP; 138 } 139 140 static int 141 mpls_disconnect(struct socket *so) 142 { 143 KASSERT(solocked(so)); 144 145 return EOPNOTSUPP; 146 } 147 148 static int 149 mpls_shutdown(struct socket *so) 150 { 151 KASSERT(solocked(so)); 152 153 return EOPNOTSUPP; 154 } 155 156 static int 157 mpls_abort(struct socket *so) 158 { 159 KASSERT(solocked(so)); 160 161 return EOPNOTSUPP; 162 } 163 164 static int 165 mpls_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 166 { 167 return EOPNOTSUPP; 168 } 169 170 static int 171 mpls_stat(struct socket *so, struct stat *ub) 172 { 173 KASSERT(solocked(so)); 174 175 return EOPNOTSUPP; 176 } 177 178 static int 179 mpls_peeraddr(struct socket *so, struct sockaddr *nam) 180 { 181 KASSERT(solocked(so)); 182 183 return EOPNOTSUPP; 184 } 185 186 static int 187 mpls_sockaddr(struct socket *so, struct sockaddr *nam) 188 { 189 KASSERT(solocked(so)); 190 191 return EOPNOTSUPP; 192 } 193 194 static int 195 mpls_rcvd(struct socket *so, int flags, struct lwp *l) 196 { 197 KASSERT(solocked(so)); 198 199 return EOPNOTSUPP; 200 } 201 202 static int 203 mpls_recvoob(struct socket *so, struct mbuf *m, int flags) 204 { 205 KASSERT(solocked(so)); 206 207 return EOPNOTSUPP; 208 } 209 210 static int 211 mpls_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 212 struct mbuf *control, struct lwp *l) 213 { 214 KASSERT(solocked(so)); 215 216 return EOPNOTSUPP; 217 } 218 219 static int 220 mpls_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 221 { 222 KASSERT(solocked(so)); 223 224 return EOPNOTSUPP; 225 } 226 227 static int 228 mpls_purgeif(struct socket *so, struct ifnet *ifp) 229 { 230 231 return EOPNOTSUPP; 232 } 233 234 /* 235 * Sysctl for MPLS variables. 236 */ 237 static void 238 sysctl_net_mpls_setup(struct sysctllog **clog) 239 { 240 241 sysctl_createv(clog, 0, NULL, NULL, 242 CTLFLAG_PERMANENT, 243 CTLTYPE_NODE, "mpls", NULL, 244 NULL, 0, NULL, 0, 245 CTL_NET, PF_MPLS, CTL_EOL); 246 247 sysctl_createv(clog, 0, NULL, NULL, 248 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 249 CTLTYPE_INT, "ttl", 250 SYSCTL_DESCR("Default TTL"), 251 NULL, 0, &mpls_defttl, 0, 252 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 253 sysctl_createv(clog, 0, NULL, NULL, 254 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 255 CTLTYPE_INT, "forwarding", 256 SYSCTL_DESCR("MPLS forwarding"), 257 NULL, 0, &mpls_forwarding, 0, 258 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 259 sysctl_createv(clog, 0, NULL, NULL, 260 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 261 CTLTYPE_INT, "accept", 262 SYSCTL_DESCR("Accept MPLS Frames"), 263 NULL, 0, &mpls_frame_accept, 0, 264 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 265 sysctl_createv(clog, 0, NULL, NULL, 266 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 267 CTLTYPE_INT, "ifq_len", 268 SYSCTL_DESCR("MPLS queue length"), 269 NULL, 0, &mplsintrq.ifq_maxlen, 0, 270 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 271 sysctl_createv(clog, 0, NULL, NULL, 272 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 273 CTLTYPE_INT, "rfc4182", 274 SYSCTL_DESCR("RFC 4182 conformance"), 275 NULL, 0, &mpls_rfc4182, 0, 276 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 277 #ifdef INET 278 sysctl_createv(clog, 0, NULL, NULL, 279 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 280 CTLTYPE_INT, "inet_mapttl", 281 SYSCTL_DESCR("Map IP TTL"), 282 NULL, 0, &mpls_mapttl_inet, 0, 283 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 284 sysctl_createv(clog, 0, NULL, NULL, 285 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 286 CTLTYPE_INT, "inet_map_prec", 287 SYSCTL_DESCR("Map IP Prec"), 288 NULL, 0, &mpls_mapprec_inet, 0, 289 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 290 sysctl_createv(clog, 0, NULL, NULL, 291 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 292 CTLTYPE_INT, "icmp_respond", 293 SYSCTL_DESCR("Emit ICMP packets on errors"), 294 NULL, 0, &mpls_icmp_respond, 0, 295 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 296 #endif 297 #ifdef INET6 298 sysctl_createv(clog, 0, NULL, NULL, 299 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 300 CTLTYPE_INT, "inet6_mapttl", 301 SYSCTL_DESCR("Map IP6 TTL"), 302 NULL, 0, &mpls_mapttl_inet6, 0, 303 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 304 sysctl_createv(clog, 0, NULL, NULL, 305 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 306 CTLTYPE_INT, "inet6_map_prec", 307 SYSCTL_DESCR("Map IP6 class"), 308 NULL, 0, &mpls_mapclass_inet6, 0, 309 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 310 #endif 311 } 312 313 DOMAIN_DEFINE(mplsdomain); 314 315 PR_WRAP_USRREQS(mpls) 316 #define mpls_attach mpls_attach_wrapper 317 #define mpls_detach mpls_detach_wrapper 318 #define mpls_accept mpls_accept_wrapper 319 #define mpls_bind mpls_bind_wrapper 320 #define mpls_listen mpls_listen_wrapper 321 #define mpls_connect mpls_connect_wrapper 322 #define mpls_connect2 mpls_connect2_wrapper 323 #define mpls_disconnect mpls_disconnect_wrapper 324 #define mpls_shutdown mpls_shutdown_wrapper 325 #define mpls_abort mpls_abort_wrapper 326 #define mpls_ioctl mpls_ioctl_wrapper 327 #define mpls_stat mpls_stat_wrapper 328 #define mpls_peeraddr mpls_peeraddr_wrapper 329 #define mpls_sockaddr mpls_sockaddr_wrapper 330 #define mpls_rcvd mpls_rcvd_wrapper 331 #define mpls_recvoob mpls_recvoob_wrapper 332 #define mpls_send mpls_send_wrapper 333 #define mpls_sendoob mpls_sendoob_wrapper 334 #define mpls_purgeif mpls_purgeif_wrapper 335 336 static const struct pr_usrreqs mpls_usrreqs = { 337 .pr_attach = mpls_attach, 338 .pr_detach = mpls_detach, 339 .pr_accept = mpls_accept, 340 .pr_bind = mpls_bind, 341 .pr_listen = mpls_listen, 342 .pr_connect = mpls_connect, 343 .pr_connect2 = mpls_connect2, 344 .pr_disconnect = mpls_disconnect, 345 .pr_shutdown = mpls_shutdown, 346 .pr_abort = mpls_abort, 347 .pr_ioctl = mpls_ioctl, 348 .pr_stat = mpls_stat, 349 .pr_peeraddr = mpls_peeraddr, 350 .pr_sockaddr = mpls_sockaddr, 351 .pr_rcvd = mpls_rcvd, 352 .pr_recvoob = mpls_recvoob, 353 .pr_send = mpls_send, 354 .pr_sendoob = mpls_sendoob, 355 .pr_purgeif = mpls_purgeif, 356 }; 357 358 const struct protosw mplssw[] = { 359 { .pr_domain = &mplsdomain, 360 .pr_init = mpls_init, 361 }, 362 { 363 .pr_type = SOCK_DGRAM, 364 .pr_domain = &mplsdomain, 365 .pr_flags = PR_ATOMIC | PR_ADDR, 366 .pr_usrreqs = &mpls_usrreqs, 367 }, 368 { 369 .pr_type = SOCK_RAW, 370 .pr_domain = &mplsdomain, 371 .pr_flags = PR_ATOMIC | PR_ADDR, 372 .pr_usrreqs = &mpls_usrreqs, 373 }, 374 }; 375 376 struct domain mplsdomain = { 377 .dom_family = PF_MPLS, 378 .dom_name = "MPLS", 379 .dom_init = NULL, 380 .dom_externalize = NULL, 381 .dom_dispose = NULL, 382 .dom_protosw = mplssw, 383 .dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)], 384 .dom_rtattach = rt_inithead, 385 .dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3, 386 .dom_maxrtkey = sizeof(union mpls_shim), 387 .dom_ifattach = NULL, 388 .dom_ifdetach = NULL, 389 .dom_ifqueues = { &mplsintrq, NULL }, 390 .dom_link = { NULL }, 391 .dom_mowner = MOWNER_INIT("MPLS", ""), 392 .dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr), 393 .dom_sa_cmplen = sizeof(union mpls_shim), 394 }; 395