| 1 | /* |
| 2 | * Copyright (c) 2004, 2005 The DragonFly Project. All rights reserved. |
| 3 | * |
| 4 | * This code is derived from software contributed to The DragonFly Project |
| 5 | * by Jeffrey M. Hsu. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of The DragonFly Project nor the names of its |
| 16 | * contributors may be used to endorse or promote products derived |
| 17 | * from this software without specific, prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 21 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 22 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 23 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 24 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 26 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 27 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 28 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 29 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * Copyright (c) 2004, 2005 Jeffrey M. Hsu. All rights reserved. |
| 35 | * |
| 36 | * License terms: all terms for the DragonFly license above plus the following: |
| 37 | * |
| 38 | * 4. All advertising materials mentioning features or use of this software |
| 39 | * must display the following acknowledgement: |
| 40 | * |
| 41 | * This product includes software developed by Jeffrey M. Hsu |
| 42 | * for the DragonFly Project. |
| 43 | * |
| 44 | * This requirement may be waived with permission from Jeffrey Hsu. |
| 45 | * Permission will be granted to any DragonFly user for free. |
| 46 | * This requirement will sunset and may be removed on Jan 31, 2006, |
| 47 | * after which the standard DragonFly license (as shown above) will |
| 48 | * apply. |
| 49 | */ |
| 50 | |
| 51 | /* |
| 52 | * Copyright (c) 1988, 1991, 1993 |
| 53 | * The Regents of the University of California. All rights reserved. |
| 54 | * |
| 55 | * Redistribution and use in source and binary forms, with or without |
| 56 | * modification, are permitted provided that the following conditions |
| 57 | * are met: |
| 58 | * 1. Redistributions of source code must retain the above copyright |
| 59 | * notice, this list of conditions and the following disclaimer. |
| 60 | * 2. Redistributions in binary form must reproduce the above copyright |
| 61 | * notice, this list of conditions and the following disclaimer in the |
| 62 | * documentation and/or other materials provided with the distribution. |
| 63 | * 3. All advertising materials mentioning features or use of this software |
| 64 | * must display the following acknowledgement: |
| 65 | * This product includes software developed by the University of |
| 66 | * California, Berkeley and its contributors. |
| 67 | * 4. Neither the name of the University nor the names of its contributors |
| 68 | * may be used to endorse or promote products derived from this software |
| 69 | * without specific prior written permission. |
| 70 | * |
| 71 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 72 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 73 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 74 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 75 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 76 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 77 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 78 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 79 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 80 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 81 | * SUCH DAMAGE. |
| 82 | * |
| 83 | * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 |
| 84 | * $FreeBSD: src/sys/net/rtsock.c,v 1.44.2.11 2002/12/04 14:05:41 ru Exp $ |
| 85 | * $DragonFly: src/sys/net/rtsock.c,v 1.20 2005/01/06 17:59:32 hsu Exp $ |
| 86 | */ |
| 87 | |
| 88 | #include <sys/param.h> |
| 89 | #include <sys/systm.h> |
| 90 | #include <sys/kernel.h> |
| 91 | #include <sys/sysctl.h> |
| 92 | #include <sys/proc.h> |
| 93 | #include <sys/malloc.h> |
| 94 | #include <sys/mbuf.h> |
| 95 | #include <sys/protosw.h> |
| 96 | #include <sys/socket.h> |
| 97 | #include <sys/socketvar.h> |
| 98 | #include <sys/domain.h> |
| 99 | |
| 100 | #include <machine/stdarg.h> |
| 101 | |
| 102 | #include <net/if.h> |
| 103 | #include <net/route.h> |
| 104 | #include <net/raw_cb.h> |
| 105 | |
| 106 | MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); |
| 107 | |
| 108 | static struct route_cb { |
| 109 | int ip_count; |
| 110 | int ip6_count; |
| 111 | int ipx_count; |
| 112 | int ns_count; |
| 113 | int any_count; |
| 114 | } route_cb; |
| 115 | |
| 116 | static struct sockaddr route_dst = { 2, PF_ROUTE, }; |
| 117 | static struct sockaddr route_src = { 2, PF_ROUTE, }; |
| 118 | static struct sockaddr sa_zero = { sizeof sa_zero, AF_INET, }; |
| 119 | static struct sockproto route_proto = { PF_ROUTE, }; |
| 120 | |
| 121 | struct walkarg { |
| 122 | int w_tmemsize; |
| 123 | int w_op, w_arg; |
| 124 | caddr_t w_tmem; |
| 125 | struct sysctl_req *w_req; |
| 126 | }; |
| 127 | |
| 128 | static struct mbuf * |
| 129 | rt_msg1 (int, struct rt_addrinfo *); |
| 130 | static int rt_msg2 (int, struct rt_addrinfo *, caddr_t, struct walkarg *); |
| 131 | static int rt_xaddrs (char *, char *, struct rt_addrinfo *); |
| 132 | static int sysctl_dumpentry (struct radix_node *rn, void *vw); |
| 133 | static int sysctl_iflist (int af, struct walkarg *w); |
| 134 | static int route_output(struct mbuf *, struct socket *, ...); |
| 135 | static void rt_setmetrics (u_long, struct rt_metrics *, |
| 136 | struct rt_metrics *); |
| 137 | |
| 138 | /* |
| 139 | * It really doesn't make any sense at all for this code to share much |
| 140 | * with raw_usrreq.c, since its functionality is so restricted. XXX |
| 141 | */ |
| 142 | static int |
| 143 | rts_abort(struct socket *so) |
| 144 | { |
| 145 | int s, error; |
| 146 | |
| 147 | s = splnet(); |
| 148 | error = raw_usrreqs.pru_abort(so); |
| 149 | splx(s); |
| 150 | return error; |
| 151 | } |
| 152 | |
| 153 | /* pru_accept is EOPNOTSUPP */ |
| 154 | |
| 155 | static int |
| 156 | rts_attach(struct socket *so, int proto, struct pru_attach_info *ai) |
| 157 | { |
| 158 | struct rawcb *rp; |
| 159 | int s, error; |
| 160 | |
| 161 | if (sotorawcb(so) != NULL) |
| 162 | return EISCONN; /* XXX panic? */ |
| 163 | |
| 164 | MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK|M_ZERO); |
| 165 | if (rp == NULL) |
| 166 | return ENOBUFS; |
| 167 | |
| 168 | /* |
| 169 | * The splnet() is necessary to block protocols from sending |
| 170 | * error notifications (like RTM_REDIRECT or RTM_LOSING) while |
| 171 | * this PCB is extant but incompletely initialized. |
| 172 | * Probably we should try to do more of this work beforehand and |
| 173 | * eliminate the spl. |
| 174 | */ |
| 175 | s = splnet(); |
| 176 | so->so_pcb = rp; |
| 177 | error = raw_attach(so, proto, ai->sb_rlimit); |
| 178 | rp = sotorawcb(so); |
| 179 | if (error) { |
| 180 | splx(s); |
| 181 | free(rp, M_PCB); |
| 182 | return error; |
| 183 | } |
| 184 | switch(rp->rcb_proto.sp_protocol) { |
| 185 | case AF_INET: |
| 186 | route_cb.ip_count++; |
| 187 | break; |
| 188 | case AF_INET6: |
| 189 | route_cb.ip6_count++; |
| 190 | break; |
| 191 | case AF_IPX: |
| 192 | route_cb.ipx_count++; |
| 193 | break; |
| 194 | case AF_NS: |
| 195 | route_cb.ns_count++; |
| 196 | break; |
| 197 | } |
| 198 | rp->rcb_faddr = &route_src; |
| 199 | route_cb.any_count++; |
| 200 | soisconnected(so); |
| 201 | so->so_options |= SO_USELOOPBACK; |
| 202 | splx(s); |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int |
| 207 | rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) |
| 208 | { |
| 209 | int s, error; |
| 210 | |
| 211 | s = splnet(); |
| 212 | error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */ |
| 213 | splx(s); |
| 214 | return error; |
| 215 | } |
| 216 | |
| 217 | static int |
| 218 | rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) |
| 219 | { |
| 220 | int s, error; |
| 221 | |
| 222 | s = splnet(); |
| 223 | error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */ |
| 224 | splx(s); |
| 225 | return error; |
| 226 | } |
| 227 | |
| 228 | /* pru_connect2 is EOPNOTSUPP */ |
| 229 | /* pru_control is EOPNOTSUPP */ |
| 230 | |
| 231 | static int |
| 232 | rts_detach(struct socket *so) |
| 233 | { |
| 234 | struct rawcb *rp = sotorawcb(so); |
| 235 | int s, error; |
| 236 | |
| 237 | s = splnet(); |
| 238 | if (rp != NULL) { |
| 239 | switch(rp->rcb_proto.sp_protocol) { |
| 240 | case AF_INET: |
| 241 | route_cb.ip_count--; |
| 242 | break; |
| 243 | case AF_INET6: |
| 244 | route_cb.ip6_count--; |
| 245 | break; |
| 246 | case AF_IPX: |
| 247 | route_cb.ipx_count--; |
| 248 | break; |
| 249 | case AF_NS: |
| 250 | route_cb.ns_count--; |
| 251 | break; |
| 252 | } |
| 253 | route_cb.any_count--; |
| 254 | } |
| 255 | error = raw_usrreqs.pru_detach(so); |
| 256 | splx(s); |
| 257 | return error; |
| 258 | } |
| 259 | |
| 260 | static int |
| 261 | rts_disconnect(struct socket *so) |
| 262 | { |
| 263 | int s, error; |
| 264 | |
| 265 | s = splnet(); |
| 266 | error = raw_usrreqs.pru_disconnect(so); |
| 267 | splx(s); |
| 268 | return error; |
| 269 | } |
| 270 | |
| 271 | /* pru_listen is EOPNOTSUPP */ |
| 272 | |
| 273 | static int |
| 274 | rts_peeraddr(struct socket *so, struct sockaddr **nam) |
| 275 | { |
| 276 | int s, error; |
| 277 | |
| 278 | s = splnet(); |
| 279 | error = raw_usrreqs.pru_peeraddr(so, nam); |
| 280 | splx(s); |
| 281 | return error; |
| 282 | } |
| 283 | |
| 284 | /* pru_rcvd is EOPNOTSUPP */ |
| 285 | /* pru_rcvoob is EOPNOTSUPP */ |
| 286 | |
| 287 | static int |
| 288 | rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, |
| 289 | struct mbuf *control, struct thread *td) |
| 290 | { |
| 291 | int s, error; |
| 292 | |
| 293 | s = splnet(); |
| 294 | error = raw_usrreqs.pru_send(so, flags, m, nam, control, td); |
| 295 | splx(s); |
| 296 | return error; |
| 297 | } |
| 298 | |
| 299 | /* pru_sense is null */ |
| 300 | |
| 301 | static int |
| 302 | rts_shutdown(struct socket *so) |
| 303 | { |
| 304 | int s, error; |
| 305 | |
| 306 | s = splnet(); |
| 307 | error = raw_usrreqs.pru_shutdown(so); |
| 308 | splx(s); |
| 309 | return error; |
| 310 | } |
| 311 | |
| 312 | static int |
| 313 | rts_sockaddr(struct socket *so, struct sockaddr **nam) |
| 314 | { |
| 315 | int s, error; |
| 316 | |
| 317 | s = splnet(); |
| 318 | error = raw_usrreqs.pru_sockaddr(so, nam); |
| 319 | splx(s); |
| 320 | return error; |
| 321 | } |
| 322 | |
| 323 | static struct pr_usrreqs route_usrreqs = { |
| 324 | rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect, |
| 325 | pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect, |
| 326 | pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp, |
| 327 | rts_send, pru_sense_null, rts_shutdown, rts_sockaddr, |
| 328 | sosend, soreceive, sopoll |
| 329 | }; |
| 330 | |
| 331 | /*ARGSUSED*/ |
| 332 | static int |
| 333 | route_output(struct mbuf *m, struct socket *so, ...) |
| 334 | { |
| 335 | struct rt_msghdr *rtm = NULL; |
| 336 | struct rtentry *rt = NULL; |
| 337 | struct rtentry *saved_nrt = NULL; |
| 338 | struct radix_node_head *rnh; |
| 339 | struct ifnet *ifp = NULL; |
| 340 | struct ifaddr *ifa = NULL; |
| 341 | struct rawcb *rp = NULL; |
| 342 | struct pr_output_info *oi; |
| 343 | struct rt_addrinfo info; |
| 344 | int len, error = 0; |
| 345 | __va_list ap; |
| 346 | |
| 347 | __va_start(ap, so); |
| 348 | oi = __va_arg(ap, struct pr_output_info *); |
| 349 | __va_end(ap); |
| 350 | |
| 351 | #define gotoerr(e) { error = e; goto flush;} |
| 352 | if (m == NULL || ((m->m_len < sizeof(long)) && |
| 353 | (m = m_pullup(m, sizeof(long))) == NULL)) |
| 354 | return (ENOBUFS); |
| 355 | if (!(m->m_flags & M_PKTHDR)) |
| 356 | panic("route_output"); |
| 357 | len = m->m_pkthdr.len; |
| 358 | if (len < sizeof *rtm || |
| 359 | len != mtod(m, struct rt_msghdr *)->rtm_msglen) { |
| 360 | info.sa_dst = NULL; |
| 361 | gotoerr(EINVAL); |
| 362 | } |
| 363 | R_Malloc(rtm, struct rt_msghdr *, len); |
| 364 | if (rtm == NULL) { |
| 365 | info.sa_dst = NULL; |
| 366 | gotoerr(ENOBUFS); |
| 367 | } |
| 368 | m_copydata(m, 0, len, (caddr_t)rtm); |
| 369 | if (rtm->rtm_version != RTM_VERSION) { |
| 370 | info.sa_dst = NULL; |
| 371 | gotoerr(EPROTONOSUPPORT); |
| 372 | } |
| 373 | rtm->rtm_pid = oi->p_pid; |
| 374 | bzero(&info, sizeof info); |
| 375 | info.rti_addrs = rtm->rtm_addrs; |
| 376 | if (rt_xaddrs((char *)(rtm + 1), len + (char *)rtm, &info)) { |
| 377 | info.sa_dst = NULL; |
| 378 | gotoerr(EINVAL); |
| 379 | } |
| 380 | info.rti_flags = rtm->rtm_flags; |
| 381 | if (info.sa_dst == NULL || info.sa_dst->sa_family >= AF_MAX || |
| 382 | (info.sa_gateway != NULL && (info.sa_gateway->sa_family >= AF_MAX))) |
| 383 | gotoerr(EINVAL); |
| 384 | |
| 385 | if (info.sa_genmask != NULL) { |
| 386 | struct radix_node *t; |
| 387 | int klen; |
| 388 | |
| 389 | t = rn_addmask((char *)info.sa_genmask, TRUE, 1); |
| 390 | if (t != NULL && |
| 391 | info.sa_genmask->sa_len >= (klen = *(u_char *)t->rn_key) && |
| 392 | bcmp((char *)info.sa_genmask + 1, (char *)t->rn_key + 1, |
| 393 | klen - 1) == 0) |
| 394 | info.sa_genmask = (struct sockaddr *)(t->rn_key); |
| 395 | else |
| 396 | gotoerr(ENOBUFS); |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Verify that the caller has the appropriate privilege; RTM_GET |
| 401 | * is the only operation the non-superuser is allowed. |
| 402 | */ |
| 403 | if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0) |
| 404 | gotoerr(EPERM); |
| 405 | |
| 406 | switch (rtm->rtm_type) { |
| 407 | |
| 408 | case RTM_ADD: |
| 409 | if (info.sa_gateway == NULL) |
| 410 | gotoerr(EINVAL); |
| 411 | error = rtrequest1(RTM_ADD, &info, &saved_nrt); |
| 412 | if (error == 0 && saved_nrt != NULL) { |
| 413 | rt_setmetrics(rtm->rtm_inits, |
| 414 | &rtm->rtm_rmx, &saved_nrt->rt_rmx); |
| 415 | saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); |
| 416 | saved_nrt->rt_rmx.rmx_locks |= |
| 417 | (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); |
| 418 | saved_nrt->rt_refcnt--; |
| 419 | saved_nrt->rt_genmask = info.sa_genmask; |
| 420 | } |
| 421 | break; |
| 422 | |
| 423 | case RTM_DELETE: |
| 424 | error = rtrequest1(RTM_DELETE, &info, &saved_nrt); |
| 425 | if (error == 0) { |
| 426 | if ((rt = saved_nrt)) |
| 427 | rt->rt_refcnt++; |
| 428 | goto report; |
| 429 | } |
| 430 | break; |
| 431 | |
| 432 | case RTM_GET: |
| 433 | case RTM_CHANGE: |
| 434 | case RTM_LOCK: |
| 435 | if ((rnh = rt_tables[info.sa_dst->sa_family]) == NULL) { |
| 436 | gotoerr(EAFNOSUPPORT); |
| 437 | } else if ((rt = (struct rtentry *) rnh->rnh_lookup( |
| 438 | (char *)info.sa_dst, (char *)info.sa_netmask, rnh)) != NULL) |
| 439 | rt->rt_refcnt++; |
| 440 | else |
| 441 | gotoerr(ESRCH); |
| 442 | switch(rtm->rtm_type) { |
| 443 | |
| 444 | case RTM_GET: |
| 445 | report: |
| 446 | info.sa_dst = rt_key(rt); |
| 447 | info.sa_gateway = rt->rt_gateway; |
| 448 | info.sa_netmask = rt_mask(rt); |
| 449 | info.sa_genmask = rt->rt_genmask; |
| 450 | if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { |
| 451 | ifp = rt->rt_ifp; |
| 452 | if (ifp) { |
| 453 | info.sa_ifpaddr = |
| 454 | TAILQ_FIRST(&ifp->if_addrhead)-> |
| 455 | ifa_addr; |
| 456 | info.sa_ifaaddr = rt->rt_ifa->ifa_addr; |
| 457 | if (ifp->if_flags & IFF_POINTOPOINT) |
| 458 | info.sa_bcastaddr = |
| 459 | rt->rt_ifa->ifa_dstaddr; |
| 460 | rtm->rtm_index = ifp->if_index; |
| 461 | } else { |
| 462 | info.sa_ifpaddr = NULL; |
| 463 | info.sa_ifaaddr = NULL; |
| 464 | } |
| 465 | } |
| 466 | len = rt_msg2(rtm->rtm_type, &info, NULL, NULL); |
| 467 | if (len > rtm->rtm_msglen) { |
| 468 | struct rt_msghdr *new_rtm; |
| 469 | R_Malloc(new_rtm, struct rt_msghdr *, len); |
| 470 | if (new_rtm == NULL) |
| 471 | gotoerr(ENOBUFS); |
| 472 | bcopy(rtm, new_rtm, rtm->rtm_msglen); |
| 473 | Free(rtm); rtm = new_rtm; |
| 474 | } |
| 475 | rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL); |
| 476 | rtm->rtm_flags = rt->rt_flags; |
| 477 | rtm->rtm_rmx = rt->rt_rmx; |
| 478 | rtm->rtm_addrs = info.rti_addrs; |
| 479 | break; |
| 480 | |
| 481 | case RTM_CHANGE: |
| 482 | /* |
| 483 | * new gateway could require new ifaddr, ifp; |
| 484 | * flags may also be different; ifp may be specified |
| 485 | * by ll sockaddr when protocol address is ambiguous |
| 486 | */ |
| 487 | if (((rt->rt_flags & RTF_GATEWAY) && |
| 488 | info.sa_gateway != NULL) || |
| 489 | info.sa_ifpaddr != NULL || |
| 490 | (info.sa_ifaaddr != NULL && |
| 491 | sa_equal(info.sa_ifaaddr, rt->rt_ifa->ifa_addr))) { |
| 492 | if ((error = rt_getifa(&info)) != 0) |
| 493 | gotoerr(error); |
| 494 | } |
| 495 | if (info.sa_gateway != NULL && |
| 496 | (error = rt_setgate(rt, rt_key(rt), |
| 497 | info.sa_gateway)) != 0) |
| 498 | gotoerr(error); |
| 499 | if ((ifa = info.rti_ifa) != NULL) { |
| 500 | struct ifaddr *oifa = rt->rt_ifa; |
| 501 | |
| 502 | if (oifa != ifa) { |
| 503 | if (oifa && oifa->ifa_rtrequest) |
| 504 | oifa->ifa_rtrequest(RTM_DELETE, |
| 505 | rt, &info); |
| 506 | IFAFREE(rt->rt_ifa); |
| 507 | rt->rt_ifa = ifa; |
| 508 | IFAREF(ifa); |
| 509 | rt->rt_ifp = info.rti_ifp; |
| 510 | } |
| 511 | } |
| 512 | rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, |
| 513 | &rt->rt_rmx); |
| 514 | if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) |
| 515 | rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); |
| 516 | if (info.sa_genmask != NULL) |
| 517 | rt->rt_genmask = info.sa_genmask; |
| 518 | /* |
| 519 | * Fall into |
| 520 | */ |
| 521 | case RTM_LOCK: |
| 522 | rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); |
| 523 | rt->rt_rmx.rmx_locks |= |
| 524 | (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); |
| 525 | break; |
| 526 | } |
| 527 | break; |
| 528 | |
| 529 | default: |
| 530 | gotoerr(EOPNOTSUPP); |
| 531 | } |
| 532 | |
| 533 | flush: |
| 534 | if (rtm) { |
| 535 | if (error) |
| 536 | rtm->rtm_errno = error; |
| 537 | else |
| 538 | rtm->rtm_flags |= RTF_DONE; |
| 539 | } |
| 540 | if (rt) |
| 541 | rtfree(rt); |
| 542 | /* |
| 543 | * Check to see if we don't want our own messages. |
| 544 | */ |
| 545 | if (!(so->so_options & SO_USELOOPBACK)) { |
| 546 | if (route_cb.any_count <= 1) { |
| 547 | if (rtm) |
| 548 | Free(rtm); |
| 549 | m_freem(m); |
| 550 | return (error); |
| 551 | } |
| 552 | /* There is another listener, so construct message */ |
| 553 | rp = sotorawcb(so); |
| 554 | } |
| 555 | if (rtm) { |
| 556 | m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); |
| 557 | if (m->m_pkthdr.len < rtm->rtm_msglen) { |
| 558 | m_freem(m); |
| 559 | m = NULL; |
| 560 | } else if (m->m_pkthdr.len > rtm->rtm_msglen) |
| 561 | m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); |
| 562 | Free(rtm); |
| 563 | } |
| 564 | if (rp != NULL) |
| 565 | rp->rcb_proto.sp_family = 0; /* Avoid us */ |
| 566 | if (info.sa_dst != NULL) |
| 567 | route_proto.sp_protocol = info.sa_dst->sa_family; |
| 568 | if (m != NULL) |
| 569 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 570 | if (rp != NULL) |
| 571 | rp->rcb_proto.sp_family = PF_ROUTE; |
| 572 | return (error); |
| 573 | } |
| 574 | |
| 575 | static void |
| 576 | rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) |
| 577 | { |
| 578 | #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; |
| 579 | setmetric(RTV_RPIPE, rmx_recvpipe); |
| 580 | setmetric(RTV_SPIPE, rmx_sendpipe); |
| 581 | setmetric(RTV_SSTHRESH, rmx_ssthresh); |
| 582 | setmetric(RTV_RTT, rmx_rtt); |
| 583 | setmetric(RTV_RTTVAR, rmx_rttvar); |
| 584 | setmetric(RTV_HOPCOUNT, rmx_hopcount); |
| 585 | setmetric(RTV_MTU, rmx_mtu); |
| 586 | setmetric(RTV_EXPIRE, rmx_expire); |
| 587 | #undef setmetric |
| 588 | } |
| 589 | |
| 590 | #define ROUNDUP(a) \ |
| 591 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) |
| 592 | #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) |
| 593 | |
| 594 | /* |
| 595 | * Extract the addresses of the passed sockaddrs. |
| 596 | * Do a little sanity checking so as to avoid bad memory references. |
| 597 | * This data is derived straight from userland. |
| 598 | */ |
| 599 | static int |
| 600 | rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) |
| 601 | { |
| 602 | struct sockaddr *sa; |
| 603 | int i; |
| 604 | |
| 605 | for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { |
| 606 | if ((rtinfo->rti_addrs & (1 << i)) == 0) |
| 607 | continue; |
| 608 | sa = (struct sockaddr *)cp; |
| 609 | /* |
| 610 | * It won't fit. |
| 611 | */ |
| 612 | if ((cp + sa->sa_len) > cplim) { |
| 613 | return (EINVAL); |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * There are no more... Quit now. |
| 618 | * If there are more bits, they are in error. |
| 619 | * I've seen this. route(1) can evidently generate these. |
| 620 | * This causes kernel to core dump. |
| 621 | * For compatibility, if we see this, point to a safe address. |
| 622 | */ |
| 623 | if (sa->sa_len == 0) { |
| 624 | rtinfo->rti_info[i] = &sa_zero; |
| 625 | return (0); /* should be EINVAL but for compat */ |
| 626 | } |
| 627 | |
| 628 | /* Accept the sockaddr. */ |
| 629 | rtinfo->rti_info[i] = sa; |
| 630 | ADVANCE(cp, sa); |
| 631 | } |
| 632 | return (0); |
| 633 | } |
| 634 | |
| 635 | static struct mbuf * |
| 636 | rt_msg1(int type, struct rt_addrinfo *rtinfo) |
| 637 | { |
| 638 | struct rt_msghdr *rtm; |
| 639 | struct mbuf *m; |
| 640 | int i; |
| 641 | struct sockaddr *sa; |
| 642 | int len, dlen; |
| 643 | |
| 644 | switch (type) { |
| 645 | |
| 646 | case RTM_DELADDR: |
| 647 | case RTM_NEWADDR: |
| 648 | len = sizeof(struct ifa_msghdr); |
| 649 | break; |
| 650 | |
| 651 | case RTM_DELMADDR: |
| 652 | case RTM_NEWMADDR: |
| 653 | len = sizeof(struct ifma_msghdr); |
| 654 | break; |
| 655 | |
| 656 | case RTM_IFINFO: |
| 657 | len = sizeof(struct if_msghdr); |
| 658 | break; |
| 659 | |
| 660 | case RTM_IFANNOUNCE: |
| 661 | len = sizeof(struct if_announcemsghdr); |
| 662 | break; |
| 663 | |
| 664 | default: |
| 665 | len = sizeof(struct rt_msghdr); |
| 666 | } |
| 667 | if (len > MCLBYTES) |
| 668 | panic("rt_msg1"); |
| 669 | m = m_gethdr(MB_DONTWAIT, MT_DATA); |
| 670 | if (m && len > MHLEN) { |
| 671 | MCLGET(m, MB_DONTWAIT); |
| 672 | if (!(m->m_flags & M_EXT)) { |
| 673 | m_free(m); |
| 674 | m = NULL; |
| 675 | } |
| 676 | } |
| 677 | if (m == NULL) |
| 678 | return (m); |
| 679 | m->m_pkthdr.len = m->m_len = len; |
| 680 | m->m_pkthdr.rcvif = NULL; |
| 681 | rtm = mtod(m, struct rt_msghdr *); |
| 682 | bzero(rtm, len); |
| 683 | for (i = 0; i < RTAX_MAX; i++) { |
| 684 | if ((sa = rtinfo->rti_info[i]) == NULL) |
| 685 | continue; |
| 686 | rtinfo->rti_addrs |= (1 << i); |
| 687 | dlen = ROUNDUP(sa->sa_len); |
| 688 | m_copyback(m, len, dlen, (caddr_t)sa); |
| 689 | len += dlen; |
| 690 | } |
| 691 | if (m->m_pkthdr.len != len) { |
| 692 | m_freem(m); |
| 693 | return (NULL); |
| 694 | } |
| 695 | rtm->rtm_msglen = len; |
| 696 | rtm->rtm_version = RTM_VERSION; |
| 697 | rtm->rtm_type = type; |
| 698 | return (m); |
| 699 | } |
| 700 | |
| 701 | static int |
| 702 | rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w) |
| 703 | { |
| 704 | int i; |
| 705 | int len, dlen; |
| 706 | boolean_t second_time = FALSE; |
| 707 | caddr_t cp0; |
| 708 | |
| 709 | rtinfo->rti_addrs = NULL; |
| 710 | again: |
| 711 | switch (type) { |
| 712 | |
| 713 | case RTM_DELADDR: |
| 714 | case RTM_NEWADDR: |
| 715 | len = sizeof(struct ifa_msghdr); |
| 716 | break; |
| 717 | |
| 718 | case RTM_IFINFO: |
| 719 | len = sizeof(struct if_msghdr); |
| 720 | break; |
| 721 | |
| 722 | default: |
| 723 | len = sizeof(struct rt_msghdr); |
| 724 | } |
| 725 | cp0 = cp; |
| 726 | if (cp != NULL) |
| 727 | cp += len; |
| 728 | |
| 729 | for (i = 0; i < RTAX_MAX; i++) { |
| 730 | struct sockaddr *sa; |
| 731 | |
| 732 | if ((sa = rtinfo->rti_info[i]) == NULL) |
| 733 | continue; |
| 734 | rtinfo->rti_addrs |= (1 << i); |
| 735 | dlen = ROUNDUP(sa->sa_len); |
| 736 | if (cp != NULL) { |
| 737 | bcopy(sa, cp, dlen); |
| 738 | cp += dlen; |
| 739 | } |
| 740 | len += dlen; |
| 741 | } |
| 742 | len = ALIGN(len); |
| 743 | if (cp == NULL && w != NULL && !second_time) { |
| 744 | struct walkarg *rw = w; |
| 745 | |
| 746 | if (rw->w_req != NULL) { |
| 747 | if (rw->w_tmemsize < len) { |
| 748 | if (rw->w_tmem) |
| 749 | free(rw->w_tmem, M_RTABLE); |
| 750 | rw->w_tmem = malloc(len, M_RTABLE, |
| 751 | M_INTWAIT | M_NULLOK); |
| 752 | if (rw->w_tmem) |
| 753 | rw->w_tmemsize = len; |
| 754 | } |
| 755 | if (rw->w_tmem != NULL) { |
| 756 | cp = rw->w_tmem; |
| 757 | second_time = TRUE; |
| 758 | goto again; |
| 759 | } |
| 760 | } |
| 761 | } |
| 762 | if (cp != NULL) { |
| 763 | struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; |
| 764 | |
| 765 | rtm->rtm_version = RTM_VERSION; |
| 766 | rtm->rtm_type = type; |
| 767 | rtm->rtm_msglen = len; |
| 768 | } |
| 769 | return (len); |
| 770 | } |
| 771 | |
| 772 | /* |
| 773 | * This routine is called to generate a message from the routing |
| 774 | * socket indicating that a redirect has occurred, a routing lookup |
| 775 | * has failed, or that a protocol has detected timeouts to a particular |
| 776 | * destination. |
| 777 | */ |
| 778 | void |
| 779 | rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) |
| 780 | { |
| 781 | struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; |
| 782 | struct rt_msghdr *rtm; |
| 783 | struct mbuf *m; |
| 784 | |
| 785 | if (route_cb.any_count == 0) |
| 786 | return; |
| 787 | m = rt_msg1(type, rtinfo); |
| 788 | if (m == NULL) |
| 789 | return; |
| 790 | rtm = mtod(m, struct rt_msghdr *); |
| 791 | rtm->rtm_flags = RTF_DONE | flags; |
| 792 | rtm->rtm_errno = error; |
| 793 | rtm->rtm_addrs = rtinfo->rti_addrs; |
| 794 | route_proto.sp_protocol = (dst != NULL) ? dst->sa_family : 0; |
| 795 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 796 | } |
| 797 | |
| 798 | void |
| 799 | rt_dstmsg(int type, struct sockaddr *dst, int error) |
| 800 | { |
| 801 | struct rt_msghdr *rtm; |
| 802 | struct rt_addrinfo addrs; |
| 803 | struct mbuf *m; |
| 804 | |
| 805 | if (route_cb.any_count == 0) |
| 806 | return; |
| 807 | bzero(&addrs, sizeof(struct rt_addrinfo)); |
| 808 | addrs.rti_info[RTAX_DST] = dst; |
| 809 | m = rt_msg1(type, &addrs); |
| 810 | if (m == NULL) |
| 811 | return; |
| 812 | rtm = mtod(m, struct rt_msghdr *); |
| 813 | rtm->rtm_flags = RTF_DONE; |
| 814 | rtm->rtm_errno = error; |
| 815 | rtm->rtm_addrs = addrs.rti_addrs; |
| 816 | route_proto.sp_protocol = (dst != NULL) ? dst->sa_family : 0; |
| 817 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 818 | } |
| 819 | |
| 820 | /* |
| 821 | * This routine is called to generate a message from the routing |
| 822 | * socket indicating that the status of a network interface has changed. |
| 823 | */ |
| 824 | void |
| 825 | rt_ifmsg(struct ifnet *ifp) |
| 826 | { |
| 827 | struct if_msghdr *ifm; |
| 828 | struct mbuf *m; |
| 829 | struct rt_addrinfo info; |
| 830 | |
| 831 | if (route_cb.any_count == 0) |
| 832 | return; |
| 833 | bzero(&info, sizeof info); |
| 834 | m = rt_msg1(RTM_IFINFO, &info); |
| 835 | if (m == NULL) |
| 836 | return; |
| 837 | ifm = mtod(m, struct if_msghdr *); |
| 838 | ifm->ifm_index = ifp->if_index; |
| 839 | ifm->ifm_flags = (u_short)ifp->if_flags; |
| 840 | ifm->ifm_data = ifp->if_data; |
| 841 | ifm->ifm_addrs = NULL; |
| 842 | route_proto.sp_protocol = 0; |
| 843 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 844 | } |
| 845 | |
| 846 | static void |
| 847 | rt_ifamsg(int cmd, struct ifaddr *ifa) |
| 848 | { |
| 849 | struct ifa_msghdr *ifam; |
| 850 | struct rt_addrinfo info; |
| 851 | struct mbuf *m; |
| 852 | struct sockaddr *sa; |
| 853 | struct ifnet *ifp = ifa->ifa_ifp; |
| 854 | |
| 855 | bzero(&info, sizeof info); |
| 856 | info.sa_ifaaddr = sa = ifa->ifa_addr; |
| 857 | info.sa_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; |
| 858 | info.sa_netmask = ifa->ifa_netmask; |
| 859 | info.sa_bcastaddr = ifa->ifa_dstaddr; |
| 860 | |
| 861 | m = rt_msg1(cmd, &info); |
| 862 | if (m == NULL) |
| 863 | return; |
| 864 | |
| 865 | ifam = mtod(m, struct ifa_msghdr *); |
| 866 | ifam->ifam_index = ifp->if_index; |
| 867 | ifam->ifam_metric = ifa->ifa_metric; |
| 868 | ifam->ifam_flags = ifa->ifa_flags; |
| 869 | ifam->ifam_addrs = info.rti_addrs; |
| 870 | |
| 871 | route_proto.sp_protocol = sa ? sa->sa_family : 0; |
| 872 | |
| 873 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 874 | } |
| 875 | |
| 876 | void |
| 877 | rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) |
| 878 | { |
| 879 | struct rt_msghdr *rtm; |
| 880 | struct rt_addrinfo info; |
| 881 | struct mbuf *m; |
| 882 | struct sockaddr *dst; |
| 883 | |
| 884 | if (rt == NULL) |
| 885 | return; |
| 886 | |
| 887 | bzero(&info, sizeof info); |
| 888 | info.sa_dst = dst = rt_key(rt); |
| 889 | info.sa_gateway = rt->rt_gateway; |
| 890 | info.sa_netmask = rt_mask(rt); |
| 891 | if (ifp != NULL) |
| 892 | info.sa_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; |
| 893 | info.sa_ifaaddr = rt->rt_ifa->ifa_addr; |
| 894 | |
| 895 | m = rt_msg1(cmd, &info); |
| 896 | if (m == NULL) |
| 897 | return; |
| 898 | |
| 899 | rtm = mtod(m, struct rt_msghdr *); |
| 900 | if (ifp != NULL) |
| 901 | rtm->rtm_index = ifp->if_index; |
| 902 | rtm->rtm_flags |= rt->rt_flags; |
| 903 | rtm->rtm_errno = error; |
| 904 | rtm->rtm_addrs = info.rti_addrs; |
| 905 | |
| 906 | route_proto.sp_protocol = (dst != NULL) ? dst->sa_family : 0; |
| 907 | |
| 908 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 909 | } |
| 910 | |
| 911 | /* |
| 912 | * This is called to generate messages from the routing socket |
| 913 | * indicating a network interface has had addresses associated with it. |
| 914 | * if we ever reverse the logic and replace messages TO the routing |
| 915 | * socket indicate a request to configure interfaces, then it will |
| 916 | * be unnecessary as the routing socket will automatically generate |
| 917 | * copies of it. |
| 918 | */ |
| 919 | void |
| 920 | rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) |
| 921 | { |
| 922 | if (route_cb.any_count == 0) |
| 923 | return; |
| 924 | |
| 925 | if (cmd == RTM_ADD) { |
| 926 | rt_ifamsg(RTM_NEWADDR, ifa); |
| 927 | rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); |
| 928 | } else { |
| 929 | KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); |
| 930 | rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); |
| 931 | rt_ifamsg(RTM_DELADDR, ifa); |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | /* |
| 936 | * This is the analogue to the rt_newaddrmsg which performs the same |
| 937 | * function but for multicast group memberhips. This is easier since |
| 938 | * there is no route state to worry about. |
| 939 | */ |
| 940 | void |
| 941 | rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) |
| 942 | { |
| 943 | struct rt_addrinfo info; |
| 944 | struct mbuf *m = NULL; |
| 945 | struct ifnet *ifp = ifma->ifma_ifp; |
| 946 | struct ifma_msghdr *ifmam; |
| 947 | |
| 948 | if (route_cb.any_count == 0) |
| 949 | return; |
| 950 | |
| 951 | bzero(&info, sizeof info); |
| 952 | info.sa_ifaaddr = ifma->ifma_addr; |
| 953 | if (ifp != NULL && TAILQ_FIRST(&ifp->if_addrhead) != NULL) |
| 954 | info.sa_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; |
| 955 | else |
| 956 | info.sa_ifpaddr = NULL; |
| 957 | /* |
| 958 | * If a link-layer address is present, present it as a ``gateway'' |
| 959 | * (similarly to how ARP entries, e.g., are presented). |
| 960 | */ |
| 961 | info.sa_gateway = ifma->ifma_lladdr; |
| 962 | |
| 963 | m = rt_msg1(cmd, &info); |
| 964 | if (m == NULL) |
| 965 | return; |
| 966 | |
| 967 | ifmam = mtod(m, struct ifma_msghdr *); |
| 968 | ifmam->ifmam_index = ifp->if_index; |
| 969 | ifmam->ifmam_addrs = info.rti_addrs; |
| 970 | route_proto.sp_protocol = ifma->ifma_addr->sa_family; |
| 971 | |
| 972 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 973 | } |
| 974 | |
| 975 | /* |
| 976 | * This is called to generate routing socket messages indicating |
| 977 | * network interface arrival and departure. |
| 978 | */ |
| 979 | void |
| 980 | rt_ifannouncemsg(ifp, what) |
| 981 | struct ifnet *ifp; |
| 982 | int what; |
| 983 | { |
| 984 | struct if_announcemsghdr *ifan; |
| 985 | struct mbuf *m; |
| 986 | struct rt_addrinfo info; |
| 987 | |
| 988 | if (route_cb.any_count == 0) |
| 989 | return; |
| 990 | |
| 991 | bzero(&info, sizeof info); |
| 992 | |
| 993 | m = rt_msg1(RTM_IFANNOUNCE, &info); |
| 994 | if (m == NULL) |
| 995 | return; |
| 996 | |
| 997 | ifan = mtod(m, struct if_announcemsghdr *); |
| 998 | ifan->ifan_index = ifp->if_index; |
| 999 | strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); |
| 1000 | ifan->ifan_what = what; |
| 1001 | |
| 1002 | route_proto.sp_protocol = 0; |
| 1003 | |
| 1004 | raw_input(m, &route_proto, &route_src, &route_dst); |
| 1005 | } |
| 1006 | |
| 1007 | /* |
| 1008 | * This is used in dumping the kernel table via sysctl(). |
| 1009 | */ |
| 1010 | int |
| 1011 | sysctl_dumpentry(rn, vw) |
| 1012 | struct radix_node *rn; |
| 1013 | void *vw; |
| 1014 | { |
| 1015 | struct walkarg *w = vw; |
| 1016 | struct rtentry *rt = (struct rtentry *)rn; |
| 1017 | int error = 0, size; |
| 1018 | struct rt_addrinfo info; |
| 1019 | |
| 1020 | if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) |
| 1021 | return 0; |
| 1022 | |
| 1023 | bzero(&info, sizeof info); |
| 1024 | info.sa_dst = rt_key(rt); |
| 1025 | info.sa_gateway = rt->rt_gateway; |
| 1026 | info.sa_netmask = rt_mask(rt); |
| 1027 | info.sa_genmask = rt->rt_genmask; |
| 1028 | if (rt->rt_ifp != NULL) { |
| 1029 | info.sa_ifpaddr = |
| 1030 | TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr; |
| 1031 | info.sa_ifaaddr = rt->rt_ifa->ifa_addr; |
| 1032 | if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) |
| 1033 | info.sa_bcastaddr = rt->rt_ifa->ifa_dstaddr; |
| 1034 | } |
| 1035 | size = rt_msg2(RTM_GET, &info, NULL, w); |
| 1036 | if (w->w_req != NULL && w->w_tmem != NULL) { |
| 1037 | struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; |
| 1038 | |
| 1039 | rtm->rtm_flags = rt->rt_flags; |
| 1040 | rtm->rtm_use = rt->rt_use; |
| 1041 | rtm->rtm_rmx = rt->rt_rmx; |
| 1042 | rtm->rtm_index = rt->rt_ifp->if_index; |
| 1043 | rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; |
| 1044 | rtm->rtm_addrs = info.rti_addrs; |
| 1045 | error = SYSCTL_OUT(w->w_req, rtm, size); |
| 1046 | return (error); |
| 1047 | } |
| 1048 | return (error); |
| 1049 | } |
| 1050 | |
| 1051 | int |
| 1052 | sysctl_iflist(af, w) |
| 1053 | int af; |
| 1054 | struct walkarg *w; |
| 1055 | { |
| 1056 | struct ifnet *ifp; |
| 1057 | struct ifaddr *ifa; |
| 1058 | struct rt_addrinfo info; |
| 1059 | int len, error = 0; |
| 1060 | |
| 1061 | bzero(&info, sizeof info); |
| 1062 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 1063 | if (w->w_arg && w->w_arg != ifp->if_index) |
| 1064 | continue; |
| 1065 | ifa = TAILQ_FIRST(&ifp->if_addrhead); |
| 1066 | info.sa_ifpaddr = ifa->ifa_addr; |
| 1067 | len = rt_msg2(RTM_IFINFO, &info, NULL, w); |
| 1068 | info.sa_ifpaddr = NULL; |
| 1069 | if (w->w_req != NULL && w->w_tmem != NULL) { |
| 1070 | struct if_msghdr *ifm; |
| 1071 | |
| 1072 | ifm = (struct if_msghdr *)w->w_tmem; |
| 1073 | ifm->ifm_index = ifp->if_index; |
| 1074 | ifm->ifm_flags = (u_short)ifp->if_flags; |
| 1075 | ifm->ifm_data = ifp->if_data; |
| 1076 | ifm->ifm_addrs = info.rti_addrs; |
| 1077 | error = SYSCTL_OUT(w->w_req, ifm, len); |
| 1078 | if (error) |
| 1079 | return (error); |
| 1080 | } |
| 1081 | while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { |
| 1082 | if (af && af != ifa->ifa_addr->sa_family) |
| 1083 | continue; |
| 1084 | if (curproc->p_ucred->cr_prison && prison_if(curthread, ifa->ifa_addr)) |
| 1085 | continue; |
| 1086 | info.sa_ifaaddr = ifa->ifa_addr; |
| 1087 | info.sa_netmask = ifa->ifa_netmask; |
| 1088 | info.sa_bcastaddr = ifa->ifa_dstaddr; |
| 1089 | len = rt_msg2(RTM_NEWADDR, &info, NULL, w); |
| 1090 | if (w->w_req && w->w_tmem) { |
| 1091 | struct ifa_msghdr *ifam; |
| 1092 | |
| 1093 | ifam = (struct ifa_msghdr *)w->w_tmem; |
| 1094 | ifam->ifam_index = ifa->ifa_ifp->if_index; |
| 1095 | ifam->ifam_flags = ifa->ifa_flags; |
| 1096 | ifam->ifam_metric = ifa->ifa_metric; |
| 1097 | ifam->ifam_addrs = info.rti_addrs; |
| 1098 | error = SYSCTL_OUT(w->w_req, w->w_tmem, len); |
| 1099 | if (error) |
| 1100 | return (error); |
| 1101 | } |
| 1102 | } |
| 1103 | info.sa_netmask = info.sa_ifaaddr = info.sa_bcastaddr = NULL; |
| 1104 | } |
| 1105 | return (0); |
| 1106 | } |
| 1107 | |
| 1108 | static int |
| 1109 | sysctl_rtsock(SYSCTL_HANDLER_ARGS) |
| 1110 | { |
| 1111 | int *name = (int *)arg1; |
| 1112 | u_int namelen = arg2; |
| 1113 | struct radix_node_head *rnh; |
| 1114 | int i, s, error = EINVAL; |
| 1115 | u_char af; |
| 1116 | struct walkarg w; |
| 1117 | |
| 1118 | name ++; |
| 1119 | namelen--; |
| 1120 | if (req->newptr) |
| 1121 | return (EPERM); |
| 1122 | if (namelen != 3) |
| 1123 | return (EINVAL); |
| 1124 | af = name[0]; |
| 1125 | bzero(&w, sizeof w); |
| 1126 | w.w_op = name[1]; |
| 1127 | w.w_arg = name[2]; |
| 1128 | w.w_req = req; |
| 1129 | |
| 1130 | s = splnet(); |
| 1131 | switch (w.w_op) { |
| 1132 | |
| 1133 | case NET_RT_DUMP: |
| 1134 | case NET_RT_FLAGS: |
| 1135 | for (i = 1; i <= AF_MAX; i++) |
| 1136 | if ((rnh = rt_tables[i]) && (af == 0 || af == i) && |
| 1137 | (error = rnh->rnh_walktree(rnh, |
| 1138 | sysctl_dumpentry, &w))) |
| 1139 | break; |
| 1140 | break; |
| 1141 | |
| 1142 | case NET_RT_IFLIST: |
| 1143 | error = sysctl_iflist(af, &w); |
| 1144 | } |
| 1145 | splx(s); |
| 1146 | if (w.w_tmem) |
| 1147 | free(w.w_tmem, M_RTABLE); |
| 1148 | return (error); |
| 1149 | } |
| 1150 | |
| 1151 | SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); |
| 1152 | |
| 1153 | /* |
| 1154 | * Definitions of protocols supported in the ROUTE domain. |
| 1155 | */ |
| 1156 | |
| 1157 | extern struct domain routedomain; /* or at least forward */ |
| 1158 | |
| 1159 | static struct protosw routesw[] = { |
| 1160 | { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, |
| 1161 | 0, route_output, raw_ctlinput, 0, |
| 1162 | cpu0_soport, |
| 1163 | raw_init, 0, 0, 0, |
| 1164 | &route_usrreqs |
| 1165 | } |
| 1166 | }; |
| 1167 | |
| 1168 | static struct domain routedomain = |
| 1169 | { PF_ROUTE, "route", 0, 0, 0, |
| 1170 | routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])] }; |
| 1171 | |
| 1172 | DOMAIN_SET(route); |