1 /* $NetBSD: mpls_proto.c,v 1.29 2015/08/24 22:21:27 pooka 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 1.29 2015/08/24 22:21:27 pooka 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 79 sysctl_net_mpls_setup(NULL); 80 } 81 82 static int 83 mpls_attach(struct socket *so, int proto) 84 { 85 int error = EOPNOTSUPP; 86 87 sosetlock(so); 88 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 89 error = soreserve(so, 8192, 8192); 90 } 91 return error; 92 } 93 94 static void 95 mpls_detach(struct socket *so) 96 { 97 } 98 99 static int 100 mpls_accept(struct socket *so, struct sockaddr *nam) 101 { 102 KASSERT(solocked(so)); 103 104 return EOPNOTSUPP; 105 } 106 107 static int 108 mpls_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 109 { 110 KASSERT(solocked(so)); 111 112 return EOPNOTSUPP; 113 } 114 115 static int 116 mpls_listen(struct socket *so, struct lwp *l) 117 { 118 KASSERT(solocked(so)); 119 120 return EOPNOTSUPP; 121 } 122 123 static int 124 mpls_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 125 { 126 KASSERT(solocked(so)); 127 128 return EOPNOTSUPP; 129 } 130 131 static int 132 mpls_connect2(struct socket *so, struct socket *so2) 133 { 134 KASSERT(solocked(so)); 135 136 return EOPNOTSUPP; 137 } 138 139 static int 140 mpls_disconnect(struct socket *so) 141 { 142 KASSERT(solocked(so)); 143 144 return EOPNOTSUPP; 145 } 146 147 static int 148 mpls_shutdown(struct socket *so) 149 { 150 KASSERT(solocked(so)); 151 152 return EOPNOTSUPP; 153 } 154 155 static int 156 mpls_abort(struct socket *so) 157 { 158 KASSERT(solocked(so)); 159 160 return EOPNOTSUPP; 161 } 162 163 static int 164 mpls_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 165 { 166 return EOPNOTSUPP; 167 } 168 169 static int 170 mpls_stat(struct socket *so, struct stat *ub) 171 { 172 KASSERT(solocked(so)); 173 174 return EOPNOTSUPP; 175 } 176 177 static int 178 mpls_peeraddr(struct socket *so, struct sockaddr *nam) 179 { 180 KASSERT(solocked(so)); 181 182 return EOPNOTSUPP; 183 } 184 185 static int 186 mpls_sockaddr(struct socket *so, struct sockaddr *nam) 187 { 188 KASSERT(solocked(so)); 189 190 return EOPNOTSUPP; 191 } 192 193 static int 194 mpls_rcvd(struct socket *so, int flags, struct lwp *l) 195 { 196 KASSERT(solocked(so)); 197 198 return EOPNOTSUPP; 199 } 200 201 static int 202 mpls_recvoob(struct socket *so, struct mbuf *m, int flags) 203 { 204 KASSERT(solocked(so)); 205 206 return EOPNOTSUPP; 207 } 208 209 static int 210 mpls_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 211 struct mbuf *control, struct lwp *l) 212 { 213 KASSERT(solocked(so)); 214 215 return EOPNOTSUPP; 216 } 217 218 static int 219 mpls_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 220 { 221 KASSERT(solocked(so)); 222 223 return EOPNOTSUPP; 224 } 225 226 static int 227 mpls_purgeif(struct socket *so, struct ifnet *ifp) 228 { 229 230 return EOPNOTSUPP; 231 } 232 233 /* 234 * Sysctl for MPLS variables. 235 */ 236 static void 237 sysctl_net_mpls_setup(struct sysctllog **clog) 238 { 239 240 sysctl_createv(clog, 0, NULL, NULL, 241 CTLFLAG_PERMANENT, 242 CTLTYPE_NODE, "mpls", NULL, 243 NULL, 0, NULL, 0, 244 CTL_NET, PF_MPLS, CTL_EOL); 245 246 sysctl_createv(clog, 0, NULL, NULL, 247 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 248 CTLTYPE_INT, "ttl", 249 SYSCTL_DESCR("Default TTL"), 250 NULL, 0, &mpls_defttl, 0, 251 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 252 sysctl_createv(clog, 0, NULL, NULL, 253 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 254 CTLTYPE_INT, "forwarding", 255 SYSCTL_DESCR("MPLS forwarding"), 256 NULL, 0, &mpls_forwarding, 0, 257 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 258 sysctl_createv(clog, 0, NULL, NULL, 259 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 260 CTLTYPE_INT, "accept", 261 SYSCTL_DESCR("Accept MPLS Frames"), 262 NULL, 0, &mpls_frame_accept, 0, 263 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 264 sysctl_createv(clog, 0, NULL, NULL, 265 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 266 CTLTYPE_INT, "ifq_len", 267 SYSCTL_DESCR("MPLS queue length"), 268 NULL, 0, &mplsintrq.ifq_maxlen, 0, 269 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 270 sysctl_createv(clog, 0, NULL, NULL, 271 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 272 CTLTYPE_INT, "rfc4182", 273 SYSCTL_DESCR("RFC 4182 conformance"), 274 NULL, 0, &mpls_rfc4182, 0, 275 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 276 #ifdef INET 277 sysctl_createv(clog, 0, NULL, NULL, 278 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 279 CTLTYPE_INT, "inet_mapttl", 280 SYSCTL_DESCR("Map IP TTL"), 281 NULL, 0, &mpls_mapttl_inet, 0, 282 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 283 sysctl_createv(clog, 0, NULL, NULL, 284 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 285 CTLTYPE_INT, "inet_map_prec", 286 SYSCTL_DESCR("Map IP Prec"), 287 NULL, 0, &mpls_mapprec_inet, 0, 288 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 289 sysctl_createv(clog, 0, NULL, NULL, 290 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 291 CTLTYPE_INT, "icmp_respond", 292 SYSCTL_DESCR("Emit ICMP packets on errors"), 293 NULL, 0, &mpls_icmp_respond, 0, 294 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 295 #endif 296 #ifdef INET6 297 sysctl_createv(clog, 0, NULL, NULL, 298 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 299 CTLTYPE_INT, "inet6_mapttl", 300 SYSCTL_DESCR("Map IP6 TTL"), 301 NULL, 0, &mpls_mapttl_inet6, 0, 302 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 303 sysctl_createv(clog, 0, NULL, NULL, 304 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 305 CTLTYPE_INT, "inet6_map_prec", 306 SYSCTL_DESCR("Map IP6 class"), 307 NULL, 0, &mpls_mapclass_inet6, 0, 308 CTL_NET, PF_MPLS, CTL_CREATE, CTL_EOL); 309 #endif 310 } 311 312 DOMAIN_DEFINE(mplsdomain); 313 314 PR_WRAP_USRREQS(mpls) 315 #define mpls_attach mpls_attach_wrapper 316 #define mpls_detach mpls_detach_wrapper 317 #define mpls_accept mpls_accept_wrapper 318 #define mpls_bind mpls_bind_wrapper 319 #define mpls_listen mpls_listen_wrapper 320 #define mpls_connect mpls_connect_wrapper 321 #define mpls_connect2 mpls_connect2_wrapper 322 #define mpls_disconnect mpls_disconnect_wrapper 323 #define mpls_shutdown mpls_shutdown_wrapper 324 #define mpls_abort mpls_abort_wrapper 325 #define mpls_ioctl mpls_ioctl_wrapper 326 #define mpls_stat mpls_stat_wrapper 327 #define mpls_peeraddr mpls_peeraddr_wrapper 328 #define mpls_sockaddr mpls_sockaddr_wrapper 329 #define mpls_rcvd mpls_rcvd_wrapper 330 #define mpls_recvoob mpls_recvoob_wrapper 331 #define mpls_send mpls_send_wrapper 332 #define mpls_sendoob mpls_sendoob_wrapper 333 #define mpls_purgeif mpls_purgeif_wrapper 334 335 static const struct pr_usrreqs mpls_usrreqs = { 336 .pr_attach = mpls_attach, 337 .pr_detach = mpls_detach, 338 .pr_accept = mpls_accept, 339 .pr_bind = mpls_bind, 340 .pr_listen = mpls_listen, 341 .pr_connect = mpls_connect, 342 .pr_connect2 = mpls_connect2, 343 .pr_disconnect = mpls_disconnect, 344 .pr_shutdown = mpls_shutdown, 345 .pr_abort = mpls_abort, 346 .pr_ioctl = mpls_ioctl, 347 .pr_stat = mpls_stat, 348 .pr_peeraddr = mpls_peeraddr, 349 .pr_sockaddr = mpls_sockaddr, 350 .pr_rcvd = mpls_rcvd, 351 .pr_recvoob = mpls_recvoob, 352 .pr_send = mpls_send, 353 .pr_sendoob = mpls_sendoob, 354 .pr_purgeif = mpls_purgeif, 355 }; 356 357 const struct protosw mplssw[] = { 358 { .pr_domain = &mplsdomain, 359 .pr_init = mpls_init, 360 }, 361 { 362 .pr_type = SOCK_DGRAM, 363 .pr_domain = &mplsdomain, 364 .pr_flags = PR_ATOMIC | PR_ADDR, 365 .pr_usrreqs = &mpls_usrreqs, 366 }, 367 { 368 .pr_type = SOCK_RAW, 369 .pr_domain = &mplsdomain, 370 .pr_flags = PR_ATOMIC | PR_ADDR, 371 .pr_usrreqs = &mpls_usrreqs, 372 }, 373 }; 374 375 struct domain mplsdomain = { 376 .dom_family = PF_MPLS, 377 .dom_name = "MPLS", 378 .dom_init = NULL, 379 .dom_externalize = NULL, 380 .dom_dispose = NULL, 381 .dom_protosw = mplssw, 382 .dom_protoswNPROTOSW = &mplssw[__arraycount(mplssw)], 383 .dom_rtattach = rt_inithead, 384 .dom_rtoffset = offsetof(struct sockaddr_mpls, smpls_addr) << 3, 385 .dom_maxrtkey = sizeof(union mpls_shim), 386 .dom_ifattach = NULL, 387 .dom_ifdetach = NULL, 388 .dom_ifqueues = { &mplsintrq, NULL }, 389 .dom_link = { NULL }, 390 .dom_mowner = MOWNER_INIT("MPLS", ""), 391 .dom_sa_cmpofs = offsetof(struct sockaddr_mpls, smpls_addr), 392 .dom_sa_cmplen = sizeof(union mpls_shim), 393 .dom_rtcache = LIST_HEAD_INITIALIZER(mplsdomain.dom_rtcache) 394 }; 395