1 /* $NetBSD: mpls_proto.c,v 1.32 2019/01/28 12:53:01 martin 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 1.32 2019/01/28 12:53:01 martin 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 m_freem(m); 225 m_freem(control); 226 227 return EOPNOTSUPP; 228 } 229 230 static int 231 mpls_purgeif(struct socket *so, struct ifnet *ifp) 232 { 233 234 return EOPNOTSUPP; 235 } 236 237 /* 238 * Sysctl for MPLS variables. 239 */ 240 static void 241 sysctl_net_mpls_setup(struct sysctllog **clog) 242 { 243 244 sysctl_createv(clog, 0, NULL, NULL, 245 CTLFLAG_PERMANENT, 246 CTLTYPE_NODE, "mpls", NULL, 247 NULL, 0, NULL, 0, 248 CTL_NET, PF_MPLS, CTL_EOL); 249 250 sysctl_createv(clog, 0, NULL, NULL, 251 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 252 CTLTYPE_INT, "ttl", 253 SYSCTL_DESCR("Default TTL"), 254 NULL, 0, &mpls_defttl, 0, 255 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 256 sysctl_createv(clog, 0, NULL, NULL, 257 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 258 CTLTYPE_INT, "forwarding", 259 SYSCTL_DESCR("MPLS forwarding"), 260 NULL, 0, &mpls_forwarding, 0, 261 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 262 sysctl_createv(clog, 0, NULL, NULL, 263 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 264 CTLTYPE_INT, "accept", 265 SYSCTL_DESCR("Accept MPLS Frames"), 266 NULL, 0, &mpls_frame_accept, 0, 267 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 268 sysctl_createv(clog, 0, NULL, NULL, 269 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 270 CTLTYPE_INT, "ifq_len", 271 SYSCTL_DESCR("MPLS queue length"), 272 NULL, 0, &mplsintrq.ifq_maxlen, 0, 273 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 274 sysctl_createv(clog, 0, NULL, NULL, 275 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 276 CTLTYPE_INT, "rfc4182", 277 SYSCTL_DESCR("RFC 4182 conformance"), 278 NULL, 0, &mpls_rfc4182, 0, 279 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 280 #ifdef INET 281 sysctl_createv(clog, 0, NULL, NULL, 282 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 283 CTLTYPE_INT, "inet_mapttl", 284 SYSCTL_DESCR("Map IP TTL"), 285 NULL, 0, &mpls_mapttl_inet, 0, 286 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 287 sysctl_createv(clog, 0, NULL, NULL, 288 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 289 CTLTYPE_INT, "inet_map_prec", 290 SYSCTL_DESCR("Map IP Prec"), 291 NULL, 0, &mpls_mapprec_inet, 0, 292 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 293 sysctl_createv(clog, 0, NULL, NULL, 294 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 295 CTLTYPE_INT, "icmp_respond", 296 SYSCTL_DESCR("Emit ICMP packets on errors"), 297 NULL, 0, &mpls_icmp_respond, 0, 298 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 299 #endif 300 #ifdef INET6 301 sysctl_createv(clog, 0, NULL, NULL, 302 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 303 CTLTYPE_INT, "inet6_mapttl", 304 SYSCTL_DESCR("Map IP6 TTL"), 305 NULL, 0, &mpls_mapttl_inet6, 0, 306 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 307 sysctl_createv(clog, 0, NULL, NULL, 308 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 309 CTLTYPE_INT, "inet6_map_prec", 310 SYSCTL_DESCR("Map IP6 class"), 311 NULL, 0, &mpls_mapclass_inet6, 0, 312 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 313 #endif 314 } 315 316 DOMAIN_DEFINE(mplsdomain); 317 318 PR_WRAP_USRREQS(mpls) 319 #define mpls_attach mpls_attach_wrapper 320 #define mpls_detach mpls_detach_wrapper 321 #define mpls_accept mpls_accept_wrapper 322 #define mpls_bind mpls_bind_wrapper 323 #define mpls_listen mpls_listen_wrapper 324 #define mpls_connect mpls_connect_wrapper 325 #define mpls_connect2 mpls_connect2_wrapper 326 #define mpls_disconnect mpls_disconnect_wrapper 327 #define mpls_shutdown mpls_shutdown_wrapper 328 #define mpls_abort mpls_abort_wrapper 329 #define mpls_ioctl mpls_ioctl_wrapper 330 #define mpls_stat mpls_stat_wrapper 331 #define mpls_peeraddr mpls_peeraddr_wrapper 332 #define mpls_sockaddr mpls_sockaddr_wrapper 333 #define mpls_rcvd mpls_rcvd_wrapper 334 #define mpls_recvoob mpls_recvoob_wrapper 335 #define mpls_send mpls_send_wrapper 336 #define mpls_sendoob mpls_sendoob_wrapper 337 #define mpls_purgeif mpls_purgeif_wrapper 338 339 static const struct pr_usrreqs mpls_usrreqs = { 340 .pr_attach = mpls_attach, 341 .pr_detach = mpls_detach, 342 .pr_accept = mpls_accept, 343 .pr_bind = mpls_bind, 344 .pr_listen = mpls_listen, 345 .pr_connect = mpls_connect, 346 .pr_connect2 = mpls_connect2, 347 .pr_disconnect = mpls_disconnect, 348 .pr_shutdown = mpls_shutdown, 349 .pr_abort = mpls_abort, 350 .pr_ioctl = mpls_ioctl, 351 .pr_stat = mpls_stat, 352 .pr_peeraddr = mpls_peeraddr, 353 .pr_sockaddr = mpls_sockaddr, 354 .pr_rcvd = mpls_rcvd, 355 .pr_recvoob = mpls_recvoob, 356 .pr_send = mpls_send, 357 .pr_sendoob = mpls_sendoob, 358 .pr_purgeif = mpls_purgeif, 359 }; 360 361 const struct protosw mplssw[] = { 362 { .pr_domain = &mplsdomain, 363 .pr_init = mpls_init, 364 }, 365 { 366 .pr_type = SOCK_DGRAM, 367 .pr_domain = &mplsdomain, 368 .pr_flags = PR_ATOMIC | PR_ADDR, 369 .pr_usrreqs = &mpls_usrreqs, 370 }, 371 { 372 .pr_type = SOCK_RAW, 373 .pr_domain = &mplsdomain, 374 .pr_flags = PR_ATOMIC | PR_ADDR, 375 .pr_usrreqs = &mpls_usrreqs, 376 }, 377 }; 378 379 struct domain mplsdomain = { 380 .dom_family = PF_MPLS, 381 .dom_name = "MPLS", 382 .dom_init = NULL, 383 .dom_externalize = NULL, 384 .dom_dispose = NULL, 385 .dom_protosw = mplssw, 386 .dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)], 387 .dom_rtattach = rt_inithead, 388 .dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3, 389 .dom_maxrtkey = sizeof(union mpls_shim), 390 .dom_ifattach = NULL, 391 .dom_ifdetach = NULL, 392 .dom_ifqueues = { &mplsintrq, NULL }, 393 .dom_link = { NULL }, 394 .dom_mowner = MOWNER_INIT("MPLS", ""), 395 .dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr), 396 .dom_sa_cmplen = sizeof(union mpls_shim), 397 }; 398