1 /* 2 * Copyright (c) 1982, 1986, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95 34 * $FreeBSD$ 35 */ 36 37 #include "opt_inet6.h" 38 #include "opt_ipsec.h" 39 #include "opt_mac.h" 40 #include "opt_random_ip_id.h" 41 42 #include <sys/param.h> 43 #include <sys/kernel.h> 44 #include <sys/lock.h> 45 #include <sys/mac.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/proc.h> 49 #include <sys/protosw.h> 50 #include <sys/signalvar.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/sx.h> 54 #include <sys/sysctl.h> 55 #include <sys/systm.h> 56 57 #include <vm/uma.h> 58 59 #include <net/if.h> 60 #include <net/route.h> 61 62 #include <netinet/in.h> 63 #include <netinet/in_systm.h> 64 #include <netinet/in_pcb.h> 65 #include <netinet/in_var.h> 66 #include <netinet/ip.h> 67 #include <netinet/ip_var.h> 68 #include <netinet/ip_mroute.h> 69 70 #include <netinet/ip_fw.h> 71 #include <netinet/ip_dummynet.h> 72 73 #ifdef FAST_IPSEC 74 #include <netipsec/ipsec.h> 75 #endif /*FAST_IPSEC*/ 76 77 #ifdef IPSEC 78 #include <netinet6/ipsec.h> 79 #endif /*IPSEC*/ 80 81 struct inpcbhead ripcb; 82 struct inpcbinfo ripcbinfo; 83 84 /* control hooks for ipfw and dummynet */ 85 ip_fw_ctl_t *ip_fw_ctl_ptr; 86 ip_dn_ctl_t *ip_dn_ctl_ptr; 87 88 /* 89 * hooks for multicast routing. They all default to NULL, 90 * so leave them not initialized and rely on BSS being set to 0. 91 */ 92 93 /* The socket used to communicate with the multicast routing daemon. */ 94 struct socket *ip_mrouter; 95 96 /* The various mrouter and rsvp functions */ 97 int (*ip_mrouter_set)(struct socket *, struct sockopt *); 98 int (*ip_mrouter_get)(struct socket *, struct sockopt *); 99 int (*ip_mrouter_done)(void); 100 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 101 struct ip_moptions *); 102 int (*mrt_ioctl)(int, caddr_t); 103 int (*legal_vif_num)(int); 104 u_long (*ip_mcast_src)(int); 105 106 void (*rsvp_input_p)(struct mbuf *m, int off); 107 int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 108 void (*ip_rsvp_force_done)(struct socket *); 109 110 /* 111 * Nominal space allocated to a raw ip socket. 112 */ 113 #define RIPSNDQ 8192 114 #define RIPRCVQ 8192 115 116 /* 117 * Raw interface to IP protocol. 118 */ 119 120 /* 121 * Initialize raw connection block q. 122 */ 123 void 124 rip_init() 125 { 126 INP_INFO_LOCK_INIT(&ripcbinfo, "rip"); 127 LIST_INIT(&ripcb); 128 ripcbinfo.listhead = &ripcb; 129 /* 130 * XXX We don't use the hash list for raw IP, but it's easier 131 * to allocate a one entry hash list than it is to check all 132 * over the place for hashbase == NULL. 133 */ 134 ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask); 135 ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask); 136 ripcbinfo.ipi_zone = uma_zcreate("ripcb", sizeof(struct inpcb), 137 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 138 uma_zone_set_max(ripcbinfo.ipi_zone, maxsockets); 139 } 140 141 static struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET }; 142 /* 143 * Setup generic address and protocol structures 144 * for raw_input routine, then pass them along with 145 * mbuf chain. 146 */ 147 void 148 rip_input(m, off) 149 struct mbuf *m; 150 int off; 151 { 152 register struct ip *ip = mtod(m, struct ip *); 153 register struct inpcb *inp; 154 struct inpcb *last = 0; 155 struct mbuf *opts = 0; 156 int proto = ip->ip_p; 157 158 ripsrc.sin_addr = ip->ip_src; 159 LIST_FOREACH(inp, &ripcb, inp_list) { 160 #ifdef INET6 161 if ((inp->inp_vflag & INP_IPV4) == 0) 162 continue; 163 #endif 164 if (inp->inp_ip_p && inp->inp_ip_p != proto) 165 continue; 166 if (inp->inp_laddr.s_addr && 167 inp->inp_laddr.s_addr != ip->ip_dst.s_addr) 168 continue; 169 if (inp->inp_faddr.s_addr && 170 inp->inp_faddr.s_addr != ip->ip_src.s_addr) 171 continue; 172 if (last) { 173 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 174 int policyfail = 0; 175 176 if (n != NULL) { 177 #ifdef IPSEC 178 /* check AH/ESP integrity. */ 179 if (ipsec4_in_reject_so(n, last->inp_socket)) { 180 policyfail = 1; 181 ipsecstat.in_polvio++; 182 /* do not inject data to pcb */ 183 } 184 #endif /*IPSEC*/ 185 #ifdef FAST_IPSEC 186 /* check AH/ESP integrity. */ 187 if (ipsec4_in_reject(n, last)) { 188 policyfail = 1; 189 /* do not inject data to pcb */ 190 } 191 #endif /*FAST_IPSEC*/ 192 #ifdef MAC 193 if (policyfail == 0 && 194 mac_check_socket_deliver(last->inp_socket, 195 n) != 0) 196 policyfail = 1; 197 #endif 198 } 199 if (policyfail) 200 m_freem(n); 201 else if (n) { 202 if (last->inp_flags & INP_CONTROLOPTS || 203 last->inp_socket->so_options & SO_TIMESTAMP) 204 ip_savecontrol(last, &opts, ip, n); 205 if (sbappendaddr(&last->inp_socket->so_rcv, 206 (struct sockaddr *)&ripsrc, n, 207 opts) == 0) { 208 /* should notify about lost packet */ 209 m_freem(n); 210 if (opts) 211 m_freem(opts); 212 } else 213 sorwakeup(last->inp_socket); 214 opts = 0; 215 } 216 } 217 last = inp; 218 } 219 if (last) { 220 #ifdef IPSEC 221 /* check AH/ESP integrity. */ 222 if (ipsec4_in_reject_so(m, last->inp_socket)) { 223 m_freem(m); 224 ipsecstat.in_polvio++; 225 ipstat.ips_delivered--; 226 /* do not inject data to pcb */ 227 return; 228 } 229 #endif /*IPSEC*/ 230 #ifdef FAST_IPSEC 231 /* check AH/ESP integrity. */ 232 if (ipsec4_in_reject(m, last)) { 233 m_freem(m); 234 ipstat.ips_delivered--; 235 /* do not inject data to pcb */ 236 return; 237 } 238 #endif /*FAST_IPSEC*/ 239 #ifdef MAC 240 if (mac_check_socket_deliver(last->inp_socket, m) != 0) { 241 m_freem(m); 242 ipstat.ips_delivered--; 243 return; 244 } 245 #endif 246 if (last->inp_flags & INP_CONTROLOPTS || 247 last->inp_socket->so_options & SO_TIMESTAMP) 248 ip_savecontrol(last, &opts, ip, m); 249 if (sbappendaddr(&last->inp_socket->so_rcv, 250 (struct sockaddr *)&ripsrc, m, opts) == 0) { 251 m_freem(m); 252 if (opts) 253 m_freem(opts); 254 } else 255 sorwakeup(last->inp_socket); 256 } else { 257 m_freem(m); 258 ipstat.ips_noproto++; 259 ipstat.ips_delivered--; 260 } 261 } 262 263 /* 264 * Generate IP header and pass packet to ip_output. 265 * Tack on options user may have setup with control call. 266 */ 267 int 268 rip_output(m, so, dst) 269 struct mbuf *m; 270 struct socket *so; 271 u_long dst; 272 { 273 register struct ip *ip; 274 register struct inpcb *inp = sotoinpcb(so); 275 int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST; 276 277 #ifdef MAC 278 mac_create_mbuf_from_socket(so, m); 279 #endif 280 281 /* 282 * If the user handed us a complete IP packet, use it. 283 * Otherwise, allocate an mbuf for a header and fill it in. 284 */ 285 if ((inp->inp_flags & INP_HDRINCL) == 0) { 286 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) { 287 m_freem(m); 288 return(EMSGSIZE); 289 } 290 M_PREPEND(m, sizeof(struct ip), M_TRYWAIT); 291 ip = mtod(m, struct ip *); 292 ip->ip_tos = inp->inp_ip_tos; 293 ip->ip_off = 0; 294 ip->ip_p = inp->inp_ip_p; 295 ip->ip_len = m->m_pkthdr.len; 296 ip->ip_src = inp->inp_laddr; 297 ip->ip_dst.s_addr = dst; 298 ip->ip_ttl = inp->inp_ip_ttl; 299 } else { 300 if (m->m_pkthdr.len > IP_MAXPACKET) { 301 m_freem(m); 302 return(EMSGSIZE); 303 } 304 ip = mtod(m, struct ip *); 305 /* don't allow both user specified and setsockopt options, 306 and don't allow packet length sizes that will crash */ 307 if (((ip->ip_hl != (sizeof (*ip) >> 2)) 308 && inp->inp_options) 309 || (ip->ip_len > m->m_pkthdr.len) 310 || (ip->ip_len < (ip->ip_hl << 2))) { 311 m_freem(m); 312 return EINVAL; 313 } 314 if (ip->ip_id == 0) 315 #ifdef RANDOM_IP_ID 316 ip->ip_id = ip_randomid(); 317 #else 318 ip->ip_id = htons(ip_id++); 319 #endif 320 /* XXX prevent ip_output from overwriting header fields */ 321 flags |= IP_RAWOUTPUT; 322 ipstat.ips_rawout++; 323 } 324 325 return (ip_output(m, inp->inp_options, &inp->inp_route, flags, 326 inp->inp_moptions, inp)); 327 } 328 329 /* 330 * Raw IP socket option processing. 331 * 332 * Note that access to all of the IP administrative functions here is 333 * implicitly protected by suser() as gaining access to a raw socket 334 * requires either that the thread pass a suser() check, or that it be 335 * passed a raw socket by another thread that has passed a suser() check. 336 * If FreeBSD moves to a more fine-grained access control mechanism, 337 * additional checks will need to be placed here if the raw IP attachment 338 * check is not equivilent the the check required for these 339 * administrative operations; in some cases, these checks are already 340 * present. 341 */ 342 int 343 rip_ctloutput(so, sopt) 344 struct socket *so; 345 struct sockopt *sopt; 346 { 347 struct inpcb *inp = sotoinpcb(so); 348 int error, optval; 349 350 if (sopt->sopt_level != IPPROTO_IP) 351 return (EINVAL); 352 353 error = 0; 354 355 switch (sopt->sopt_dir) { 356 case SOPT_GET: 357 switch (sopt->sopt_name) { 358 case IP_HDRINCL: 359 optval = inp->inp_flags & INP_HDRINCL; 360 error = sooptcopyout(sopt, &optval, sizeof optval); 361 break; 362 363 case IP_FW_ADD: /* ADD actually returns the body... */ 364 case IP_FW_GET: 365 if (IPFW_LOADED) 366 error = ip_fw_ctl_ptr(sopt); 367 else 368 error = ENOPROTOOPT; 369 break; 370 371 case IP_DUMMYNET_GET: 372 if (DUMMYNET_LOADED) 373 error = ip_dn_ctl_ptr(sopt); 374 else 375 error = ENOPROTOOPT; 376 break ; 377 378 case MRT_INIT: 379 case MRT_DONE: 380 case MRT_ADD_VIF: 381 case MRT_DEL_VIF: 382 case MRT_ADD_MFC: 383 case MRT_DEL_MFC: 384 case MRT_VERSION: 385 case MRT_ASSERT: 386 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) : 387 EOPNOTSUPP; 388 break; 389 390 default: 391 error = ip_ctloutput(so, sopt); 392 break; 393 } 394 break; 395 396 case SOPT_SET: 397 switch (sopt->sopt_name) { 398 case IP_HDRINCL: 399 error = sooptcopyin(sopt, &optval, sizeof optval, 400 sizeof optval); 401 if (error) 402 break; 403 if (optval) 404 inp->inp_flags |= INP_HDRINCL; 405 else 406 inp->inp_flags &= ~INP_HDRINCL; 407 break; 408 409 case IP_FW_ADD: 410 case IP_FW_DEL: 411 case IP_FW_FLUSH: 412 case IP_FW_ZERO: 413 case IP_FW_RESETLOG: 414 if (IPFW_LOADED) 415 error = ip_fw_ctl_ptr(sopt); 416 else 417 error = ENOPROTOOPT; 418 break; 419 420 case IP_DUMMYNET_CONFIGURE: 421 case IP_DUMMYNET_DEL: 422 case IP_DUMMYNET_FLUSH: 423 if (DUMMYNET_LOADED) 424 error = ip_dn_ctl_ptr(sopt); 425 else 426 error = ENOPROTOOPT ; 427 break ; 428 429 case IP_RSVP_ON: 430 error = ip_rsvp_init(so); 431 break; 432 433 case IP_RSVP_OFF: 434 error = ip_rsvp_done(); 435 break; 436 437 case IP_RSVP_VIF_ON: 438 case IP_RSVP_VIF_OFF: 439 error = ip_rsvp_vif ? 440 ip_rsvp_vif(so, sopt) : EINVAL; 441 break; 442 443 case MRT_INIT: 444 case MRT_DONE: 445 case MRT_ADD_VIF: 446 case MRT_DEL_VIF: 447 case MRT_ADD_MFC: 448 case MRT_DEL_MFC: 449 case MRT_VERSION: 450 case MRT_ASSERT: 451 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) : 452 EOPNOTSUPP; 453 break; 454 455 default: 456 error = ip_ctloutput(so, sopt); 457 break; 458 } 459 break; 460 } 461 462 return (error); 463 } 464 465 /* 466 * This function exists solely to receive the PRC_IFDOWN messages which 467 * are sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, 468 * and calls in_ifadown() to remove all routes corresponding to that address. 469 * It also receives the PRC_IFUP messages from if_up() and reinstalls the 470 * interface routes. 471 */ 472 void 473 rip_ctlinput(cmd, sa, vip) 474 int cmd; 475 struct sockaddr *sa; 476 void *vip; 477 { 478 struct in_ifaddr *ia; 479 struct ifnet *ifp; 480 int err; 481 int flags; 482 483 switch (cmd) { 484 case PRC_IFDOWN: 485 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 486 if (ia->ia_ifa.ifa_addr == sa 487 && (ia->ia_flags & IFA_ROUTE)) { 488 /* 489 * in_ifscrub kills the interface route. 490 */ 491 in_ifscrub(ia->ia_ifp, ia); 492 /* 493 * in_ifadown gets rid of all the rest of 494 * the routes. This is not quite the right 495 * thing to do, but at least if we are running 496 * a routing process they will come back. 497 */ 498 in_ifadown(&ia->ia_ifa, 0); 499 break; 500 } 501 } 502 break; 503 504 case PRC_IFUP: 505 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 506 if (ia->ia_ifa.ifa_addr == sa) 507 break; 508 } 509 if (ia == 0 || (ia->ia_flags & IFA_ROUTE)) 510 return; 511 flags = RTF_UP; 512 ifp = ia->ia_ifa.ifa_ifp; 513 514 if ((ifp->if_flags & IFF_LOOPBACK) 515 || (ifp->if_flags & IFF_POINTOPOINT)) 516 flags |= RTF_HOST; 517 518 err = rtinit(&ia->ia_ifa, RTM_ADD, flags); 519 if (err == 0) 520 ia->ia_flags |= IFA_ROUTE; 521 break; 522 } 523 } 524 525 u_long rip_sendspace = RIPSNDQ; 526 u_long rip_recvspace = RIPRCVQ; 527 int rip_olddiverterror = 1; 528 529 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, 530 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size"); 531 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, 532 &rip_recvspace, 0, "Maximum incoming raw IP datagram size"); 533 SYSCTL_INT(_net_inet_raw, OID_AUTO, olddiverterror, CTLFLAG_RW, 534 &rip_olddiverterror, 0, "Return an error when creating an 'old' DIVERT socket"); 535 536 static int 537 rip_attach(struct socket *so, int proto, struct thread *td) 538 { 539 struct inpcb *inp; 540 int error, s; 541 542 inp = sotoinpcb(so); 543 if (inp) 544 panic("rip_attach"); 545 if (td && (error = suser(td)) != 0) 546 return error; 547 548 if (proto >= IPPROTO_MAX || proto < 0) 549 return EPROTONOSUPPORT; 550 551 /* To be removed before 5.2 */ 552 if (rip_olddiverterror && proto == IPPROTO_OLD_DIVERT) { 553 printf("Old IPDIVERT program needs to be recompiled, or new IP proto 254 user needs sysctl net.inet.raw.olddiverterror=0\n"); 554 return EPROTONOSUPPORT; 555 } 556 557 error = soreserve(so, rip_sendspace, rip_recvspace); 558 if (error) 559 return error; 560 s = splnet(); 561 error = in_pcballoc(so, &ripcbinfo, td); 562 splx(s); 563 if (error) 564 return error; 565 inp = (struct inpcb *)so->so_pcb; 566 inp->inp_vflag |= INP_IPV4; 567 inp->inp_ip_p = proto; 568 inp->inp_ip_ttl = ip_defttl; 569 return 0; 570 } 571 572 static int 573 rip_detach(struct socket *so) 574 { 575 struct inpcb *inp; 576 577 inp = sotoinpcb(so); 578 if (inp == 0) 579 panic("rip_detach"); 580 if (so == ip_mrouter && ip_mrouter_done) 581 ip_mrouter_done(); 582 if (ip_rsvp_force_done) 583 ip_rsvp_force_done(so); 584 if (so == ip_rsvpd) 585 ip_rsvp_done(); 586 in_pcbdetach(inp); 587 return 0; 588 } 589 590 static int 591 rip_abort(struct socket *so) 592 { 593 soisdisconnected(so); 594 if (so->so_state & SS_NOFDREF) 595 return rip_detach(so); 596 return 0; 597 } 598 599 static int 600 rip_disconnect(struct socket *so) 601 { 602 if ((so->so_state & SS_ISCONNECTED) == 0) 603 return ENOTCONN; 604 return rip_abort(so); 605 } 606 607 static int 608 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 609 { 610 struct inpcb *inp = sotoinpcb(so); 611 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 612 613 if (nam->sa_len != sizeof(*addr)) 614 return EINVAL; 615 616 if (TAILQ_EMPTY(&ifnet) || ((addr->sin_family != AF_INET) && 617 (addr->sin_family != AF_IMPLINK)) || 618 (addr->sin_addr.s_addr && 619 ifa_ifwithaddr((struct sockaddr *)addr) == 0)) 620 return EADDRNOTAVAIL; 621 inp->inp_laddr = addr->sin_addr; 622 return 0; 623 } 624 625 static int 626 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 627 { 628 struct inpcb *inp = sotoinpcb(so); 629 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 630 631 if (nam->sa_len != sizeof(*addr)) 632 return EINVAL; 633 if (TAILQ_EMPTY(&ifnet)) 634 return EADDRNOTAVAIL; 635 if ((addr->sin_family != AF_INET) && 636 (addr->sin_family != AF_IMPLINK)) 637 return EAFNOSUPPORT; 638 inp->inp_faddr = addr->sin_addr; 639 soisconnected(so); 640 return 0; 641 } 642 643 static int 644 rip_shutdown(struct socket *so) 645 { 646 socantsendmore(so); 647 return 0; 648 } 649 650 static int 651 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 652 struct mbuf *control, struct thread *td) 653 { 654 struct inpcb *inp = sotoinpcb(so); 655 register u_long dst; 656 657 if (so->so_state & SS_ISCONNECTED) { 658 if (nam) { 659 m_freem(m); 660 return EISCONN; 661 } 662 dst = inp->inp_faddr.s_addr; 663 } else { 664 if (nam == NULL) { 665 m_freem(m); 666 return ENOTCONN; 667 } 668 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr; 669 } 670 return rip_output(m, so, dst); 671 } 672 673 static int 674 rip_pcblist(SYSCTL_HANDLER_ARGS) 675 { 676 int error, i, n, s; 677 struct inpcb *inp, **inp_list; 678 inp_gen_t gencnt; 679 struct xinpgen xig; 680 681 /* 682 * The process of preparing the TCB list is too time-consuming and 683 * resource-intensive to repeat twice on every request. 684 */ 685 if (req->oldptr == 0) { 686 n = ripcbinfo.ipi_count; 687 req->oldidx = 2 * (sizeof xig) 688 + (n + n/8) * sizeof(struct xinpcb); 689 return 0; 690 } 691 692 if (req->newptr != 0) 693 return EPERM; 694 695 /* 696 * OK, now we're committed to doing something. 697 */ 698 s = splnet(); 699 gencnt = ripcbinfo.ipi_gencnt; 700 n = ripcbinfo.ipi_count; 701 splx(s); 702 703 xig.xig_len = sizeof xig; 704 xig.xig_count = n; 705 xig.xig_gen = gencnt; 706 xig.xig_sogen = so_gencnt; 707 error = SYSCTL_OUT(req, &xig, sizeof xig); 708 if (error) 709 return error; 710 711 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK); 712 if (inp_list == 0) 713 return ENOMEM; 714 715 s = splnet(); 716 for (inp = LIST_FIRST(ripcbinfo.listhead), i = 0; inp && i < n; 717 inp = LIST_NEXT(inp, inp_list)) { 718 if (inp->inp_gencnt <= gencnt) { 719 if (cr_canseesocket(req->td->td_ucred, 720 inp->inp_socket)) 721 continue; 722 inp_list[i++] = inp; 723 } 724 } 725 splx(s); 726 n = i; 727 728 error = 0; 729 for (i = 0; i < n; i++) { 730 inp = inp_list[i]; 731 if (inp->inp_gencnt <= gencnt) { 732 struct xinpcb xi; 733 xi.xi_len = sizeof xi; 734 /* XXX should avoid extra copy */ 735 bcopy(inp, &xi.xi_inp, sizeof *inp); 736 if (inp->inp_socket) 737 sotoxsocket(inp->inp_socket, &xi.xi_socket); 738 error = SYSCTL_OUT(req, &xi, sizeof xi); 739 } 740 } 741 if (!error) { 742 /* 743 * Give the user an updated idea of our state. 744 * If the generation differs from what we told 745 * her before, she knows that something happened 746 * while we were processing this request, and it 747 * might be necessary to retry. 748 */ 749 s = splnet(); 750 xig.xig_gen = ripcbinfo.ipi_gencnt; 751 xig.xig_sogen = so_gencnt; 752 xig.xig_count = ripcbinfo.ipi_count; 753 splx(s); 754 error = SYSCTL_OUT(req, &xig, sizeof xig); 755 } 756 free(inp_list, M_TEMP); 757 return error; 758 } 759 760 /* 761 * This is the wrapper function for in_setsockaddr. We just pass down 762 * the pcbinfo for in_setpeeraddr to lock. 763 */ 764 static int 765 rip_sockaddr(struct socket *so, struct sockaddr **nam) 766 { 767 return (in_setsockaddr(so, nam, &ripcbinfo)); 768 } 769 770 /* 771 * This is the wrapper function for in_setpeeraddr. We just pass down 772 * the pcbinfo for in_setpeeraddr to lock. 773 */ 774 static int 775 rip_peeraddr(struct socket *so, struct sockaddr **nam) 776 { 777 return (in_setpeeraddr(so, nam, &ripcbinfo)); 778 } 779 780 781 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0, 782 rip_pcblist, "S,xinpcb", "List of active raw IP sockets"); 783 784 struct pr_usrreqs rip_usrreqs = { 785 rip_abort, pru_accept_notsupp, rip_attach, rip_bind, rip_connect, 786 pru_connect2_notsupp, in_control, rip_detach, rip_disconnect, 787 pru_listen_notsupp, rip_peeraddr, pru_rcvd_notsupp, 788 pru_rcvoob_notsupp, rip_send, pru_sense_null, rip_shutdown, 789 rip_sockaddr, sosend, soreceive, sopoll 790 }; 791