Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/raw_ip.c
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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: releng/5.0/sys/netinet/raw_ip.c 107113 2002-11-20 19:00:54Z luigi $ 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 IPSSEC 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 int 333 rip_ctloutput(so, sopt) 334 struct socket *so; 335 struct sockopt *sopt; 336 { 337 struct inpcb *inp = sotoinpcb(so); 338 int error, optval; 339 340 if (sopt->sopt_level != IPPROTO_IP) 341 return (EINVAL); 342 343 error = 0; 344 345 switch (sopt->sopt_dir) { 346 case SOPT_GET: 347 switch (sopt->sopt_name) { 348 case IP_HDRINCL: 349 optval = inp->inp_flags & INP_HDRINCL; 350 error = sooptcopyout(sopt, &optval, sizeof optval); 351 break; 352 353 case IP_FW_ADD: /* ADD actually returns the body... */ 354 case IP_FW_GET: 355 if (IPFW_LOADED) 356 error = ip_fw_ctl_ptr(sopt); 357 else 358 error = ENOPROTOOPT; 359 break; 360 361 case IP_DUMMYNET_GET: 362 if (DUMMYNET_LOADED) 363 error = ip_dn_ctl_ptr(sopt); 364 else 365 error = ENOPROTOOPT; 366 break ; 367 368 case MRT_INIT: 369 case MRT_DONE: 370 case MRT_ADD_VIF: 371 case MRT_DEL_VIF: 372 case MRT_ADD_MFC: 373 case MRT_DEL_MFC: 374 case MRT_VERSION: 375 case MRT_ASSERT: 376 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) : 377 EOPNOTSUPP; 378 break; 379 380 default: 381 error = ip_ctloutput(so, sopt); 382 break; 383 } 384 break; 385 386 case SOPT_SET: 387 switch (sopt->sopt_name) { 388 case IP_HDRINCL: 389 error = sooptcopyin(sopt, &optval, sizeof optval, 390 sizeof optval); 391 if (error) 392 break; 393 if (optval) 394 inp->inp_flags |= INP_HDRINCL; 395 else 396 inp->inp_flags &= ~INP_HDRINCL; 397 break; 398 399 case IP_FW_ADD: 400 case IP_FW_DEL: 401 case IP_FW_FLUSH: 402 case IP_FW_ZERO: 403 case IP_FW_RESETLOG: 404 if (IPFW_LOADED) 405 error = ip_fw_ctl_ptr(sopt); 406 else 407 error = ENOPROTOOPT; 408 break; 409 410 case IP_DUMMYNET_CONFIGURE: 411 case IP_DUMMYNET_DEL: 412 case IP_DUMMYNET_FLUSH: 413 if (DUMMYNET_LOADED) 414 error = ip_dn_ctl_ptr(sopt); 415 else 416 error = ENOPROTOOPT ; 417 break ; 418 419 case IP_RSVP_ON: 420 error = ip_rsvp_init(so); 421 break; 422 423 case IP_RSVP_OFF: 424 error = ip_rsvp_done(); 425 break; 426 427 case IP_RSVP_VIF_ON: 428 case IP_RSVP_VIF_OFF: 429 error = ip_rsvp_vif ? 430 ip_rsvp_vif(so, sopt) : EINVAL; 431 break; 432 433 case MRT_INIT: 434 case MRT_DONE: 435 case MRT_ADD_VIF: 436 case MRT_DEL_VIF: 437 case MRT_ADD_MFC: 438 case MRT_DEL_MFC: 439 case MRT_VERSION: 440 case MRT_ASSERT: 441 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) : 442 EOPNOTSUPP; 443 break; 444 445 default: 446 error = ip_ctloutput(so, sopt); 447 break; 448 } 449 break; 450 } 451 452 return (error); 453 } 454 455 /* 456 * This function exists solely to receive the PRC_IFDOWN messages which 457 * are sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, 458 * and calls in_ifadown() to remove all routes corresponding to that address. 459 * It also receives the PRC_IFUP messages from if_up() and reinstalls the 460 * interface routes. 461 */ 462 void 463 rip_ctlinput(cmd, sa, vip) 464 int cmd; 465 struct sockaddr *sa; 466 void *vip; 467 { 468 struct in_ifaddr *ia; 469 struct ifnet *ifp; 470 int err; 471 int flags; 472 473 switch (cmd) { 474 case PRC_IFDOWN: 475 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 476 if (ia->ia_ifa.ifa_addr == sa 477 && (ia->ia_flags & IFA_ROUTE)) { 478 /* 479 * in_ifscrub kills the interface route. 480 */ 481 in_ifscrub(ia->ia_ifp, ia); 482 /* 483 * in_ifadown gets rid of all the rest of 484 * the routes. This is not quite the right 485 * thing to do, but at least if we are running 486 * a routing process they will come back. 487 */ 488 in_ifadown(&ia->ia_ifa, 0); 489 break; 490 } 491 } 492 break; 493 494 case PRC_IFUP: 495 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 496 if (ia->ia_ifa.ifa_addr == sa) 497 break; 498 } 499 if (ia == 0 || (ia->ia_flags & IFA_ROUTE)) 500 return; 501 flags = RTF_UP; 502 ifp = ia->ia_ifa.ifa_ifp; 503 504 if ((ifp->if_flags & IFF_LOOPBACK) 505 || (ifp->if_flags & IFF_POINTOPOINT)) 506 flags |= RTF_HOST; 507 508 err = rtinit(&ia->ia_ifa, RTM_ADD, flags); 509 if (err == 0) 510 ia->ia_flags |= IFA_ROUTE; 511 break; 512 } 513 } 514 515 u_long rip_sendspace = RIPSNDQ; 516 u_long rip_recvspace = RIPRCVQ; 517 int rip_olddiverterror = 1; 518 519 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, 520 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size"); 521 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, 522 &rip_recvspace, 0, "Maximum incoming raw IP datagram size"); 523 SYSCTL_INT(_net_inet_raw, OID_AUTO, olddiverterror, CTLFLAG_RW, 524 &rip_olddiverterror, 0, "Return an error when creating an 'old' DIVERT socket"); 525 526 static int 527 rip_attach(struct socket *so, int proto, struct thread *td) 528 { 529 struct inpcb *inp; 530 int error, s; 531 532 inp = sotoinpcb(so); 533 if (inp) 534 panic("rip_attach"); 535 if (td && (error = suser(td)) != 0) 536 return error; 537 538 if (proto >= IPPROTO_MAX || proto < 0) 539 return EPROTONOSUPPORT; 540 541 /* To be removed before 5.2 */ 542 if (rip_olddiverterror && proto == IPPROTO_OLD_DIVERT) { 543 printf("Old IPDIVERT program needs to be recompiled, or new IP proto 254 user needs sysctl net.inet.raw.olddiverterror=0\n"); 544 return EPROTONOSUPPORT; 545 } 546 547 error = soreserve(so, rip_sendspace, rip_recvspace); 548 if (error) 549 return error; 550 s = splnet(); 551 error = in_pcballoc(so, &ripcbinfo, td); 552 splx(s); 553 if (error) 554 return error; 555 inp = (struct inpcb *)so->so_pcb; 556 inp->inp_vflag |= INP_IPV4; 557 inp->inp_ip_p = proto; 558 inp->inp_ip_ttl = ip_defttl; 559 return 0; 560 } 561 562 static int 563 rip_detach(struct socket *so) 564 { 565 struct inpcb *inp; 566 567 inp = sotoinpcb(so); 568 if (inp == 0) 569 panic("rip_detach"); 570 if (so == ip_mrouter && ip_mrouter_done) 571 ip_mrouter_done(); 572 if (ip_rsvp_force_done) 573 ip_rsvp_force_done(so); 574 if (so == ip_rsvpd) 575 ip_rsvp_done(); 576 in_pcbdetach(inp); 577 return 0; 578 } 579 580 static int 581 rip_abort(struct socket *so) 582 { 583 soisdisconnected(so); 584 return rip_detach(so); 585 } 586 587 static int 588 rip_disconnect(struct socket *so) 589 { 590 if ((so->so_state & SS_ISCONNECTED) == 0) 591 return ENOTCONN; 592 return rip_abort(so); 593 } 594 595 static int 596 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 597 { 598 struct inpcb *inp = sotoinpcb(so); 599 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 600 601 if (nam->sa_len != sizeof(*addr)) 602 return EINVAL; 603 604 if (TAILQ_EMPTY(&ifnet) || ((addr->sin_family != AF_INET) && 605 (addr->sin_family != AF_IMPLINK)) || 606 (addr->sin_addr.s_addr && 607 ifa_ifwithaddr((struct sockaddr *)addr) == 0)) 608 return EADDRNOTAVAIL; 609 inp->inp_laddr = addr->sin_addr; 610 return 0; 611 } 612 613 static int 614 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 615 { 616 struct inpcb *inp = sotoinpcb(so); 617 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 618 619 if (nam->sa_len != sizeof(*addr)) 620 return EINVAL; 621 if (TAILQ_EMPTY(&ifnet)) 622 return EADDRNOTAVAIL; 623 if ((addr->sin_family != AF_INET) && 624 (addr->sin_family != AF_IMPLINK)) 625 return EAFNOSUPPORT; 626 inp->inp_faddr = addr->sin_addr; 627 soisconnected(so); 628 return 0; 629 } 630 631 static int 632 rip_shutdown(struct socket *so) 633 { 634 socantsendmore(so); 635 return 0; 636 } 637 638 static int 639 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 640 struct mbuf *control, struct thread *td) 641 { 642 struct inpcb *inp = sotoinpcb(so); 643 register u_long dst; 644 645 if (so->so_state & SS_ISCONNECTED) { 646 if (nam) { 647 m_freem(m); 648 return EISCONN; 649 } 650 dst = inp->inp_faddr.s_addr; 651 } else { 652 if (nam == NULL) { 653 m_freem(m); 654 return ENOTCONN; 655 } 656 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr; 657 } 658 return rip_output(m, so, dst); 659 } 660 661 static int 662 rip_pcblist(SYSCTL_HANDLER_ARGS) 663 { 664 int error, i, n, s; 665 struct inpcb *inp, **inp_list; 666 inp_gen_t gencnt; 667 struct xinpgen xig; 668 669 /* 670 * The process of preparing the TCB list is too time-consuming and 671 * resource-intensive to repeat twice on every request. 672 */ 673 if (req->oldptr == 0) { 674 n = ripcbinfo.ipi_count; 675 req->oldidx = 2 * (sizeof xig) 676 + (n + n/8) * sizeof(struct xinpcb); 677 return 0; 678 } 679 680 if (req->newptr != 0) 681 return EPERM; 682 683 /* 684 * OK, now we're committed to doing something. 685 */ 686 s = splnet(); 687 gencnt = ripcbinfo.ipi_gencnt; 688 n = ripcbinfo.ipi_count; 689 splx(s); 690 691 xig.xig_len = sizeof xig; 692 xig.xig_count = n; 693 xig.xig_gen = gencnt; 694 xig.xig_sogen = so_gencnt; 695 error = SYSCTL_OUT(req, &xig, sizeof xig); 696 if (error) 697 return error; 698 699 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK); 700 if (inp_list == 0) 701 return ENOMEM; 702 703 s = splnet(); 704 for (inp = LIST_FIRST(ripcbinfo.listhead), i = 0; inp && i < n; 705 inp = LIST_NEXT(inp, inp_list)) { 706 if (inp->inp_gencnt <= gencnt) { 707 if (cr_canseesocket(req->td->td_ucred, 708 inp->inp_socket)) 709 continue; 710 inp_list[i++] = inp; 711 } 712 } 713 splx(s); 714 n = i; 715 716 error = 0; 717 for (i = 0; i < n; i++) { 718 inp = inp_list[i]; 719 if (inp->inp_gencnt <= gencnt) { 720 struct xinpcb xi; 721 xi.xi_len = sizeof xi; 722 /* XXX should avoid extra copy */ 723 bcopy(inp, &xi.xi_inp, sizeof *inp); 724 if (inp->inp_socket) 725 sotoxsocket(inp->inp_socket, &xi.xi_socket); 726 error = SYSCTL_OUT(req, &xi, sizeof xi); 727 } 728 } 729 if (!error) { 730 /* 731 * Give the user an updated idea of our state. 732 * If the generation differs from what we told 733 * her before, she knows that something happened 734 * while we were processing this request, and it 735 * might be necessary to retry. 736 */ 737 s = splnet(); 738 xig.xig_gen = ripcbinfo.ipi_gencnt; 739 xig.xig_sogen = so_gencnt; 740 xig.xig_count = ripcbinfo.ipi_count; 741 splx(s); 742 error = SYSCTL_OUT(req, &xig, sizeof xig); 743 } 744 free(inp_list, M_TEMP); 745 return error; 746 } 747 748 /* 749 * This is the wrapper function for in_setsockaddr. We just pass down 750 * the pcbinfo for in_setpeeraddr to lock. 751 */ 752 static int 753 rip_sockaddr(struct socket *so, struct sockaddr **nam) 754 { 755 return (in_setsockaddr(so, nam, &ripcbinfo)); 756 } 757 758 /* 759 * This is the wrapper function for in_setpeeraddr. We just pass down 760 * the pcbinfo for in_setpeeraddr to lock. 761 */ 762 static int 763 rip_peeraddr(struct socket *so, struct sockaddr **nam) 764 { 765 return (in_setpeeraddr(so, nam, &ripcbinfo)); 766 } 767 768 769 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0, 770 rip_pcblist, "S,xinpcb", "List of active raw IP sockets"); 771 772 struct pr_usrreqs rip_usrreqs = { 773 rip_abort, pru_accept_notsupp, rip_attach, rip_bind, rip_connect, 774 pru_connect2_notsupp, in_control, rip_detach, rip_disconnect, 775 pru_listen_notsupp, rip_peeraddr, pru_rcvd_notsupp, 776 pru_rcvoob_notsupp, rip_send, pru_sense_null, rip_shutdown, 777 rip_sockaddr, sosend, soreceive, sopoll 778 };
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