31 */ 32 33#include "opt_inet6.h" 34#include "opt_ipsec.h" 35#include "opt_mac.h" 36#include "opt_random_ip_id.h" 37 38#include <sys/param.h> 39#include <sys/jail.h> 40#include <sys/kernel.h> 41#include <sys/lock.h> 42#include <sys/mac.h> 43#include <sys/malloc.h> 44#include <sys/mbuf.h> 45#include <sys/proc.h> 46#include <sys/protosw.h> 47#include <sys/signalvar.h> 48#include <sys/socket.h> 49#include <sys/socketvar.h> 50#include <sys/sx.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53 54#include <vm/uma.h> 55 56#include <net/if.h> 57#include <net/route.h> 58 59#include <netinet/in.h> 60#include <netinet/in_systm.h> 61#include <netinet/in_pcb.h> 62#include <netinet/in_var.h> 63#include <netinet/ip.h> 64#include <netinet/ip_var.h> 65#include <netinet/ip_mroute.h> 66 67#include <netinet/ip_fw.h> 68#include <netinet/ip_dummynet.h> 69 70#ifdef FAST_IPSEC 71#include <netipsec/ipsec.h> 72#endif /*FAST_IPSEC*/ 73 74#ifdef IPSEC 75#include <netinet6/ipsec.h> 76#endif /*IPSEC*/ 77 78struct inpcbhead ripcb; 79struct inpcbinfo ripcbinfo; 80 81/* control hooks for ipfw and dummynet */ 82ip_fw_ctl_t *ip_fw_ctl_ptr; 83ip_dn_ctl_t *ip_dn_ctl_ptr; 84 85/* 86 * hooks for multicast routing. They all default to NULL, 87 * so leave them not initialized and rely on BSS being set to 0. 88 */ 89 90/* The socket used to communicate with the multicast routing daemon. */ 91struct socket *ip_mrouter; 92 93/* The various mrouter and rsvp functions */ 94int (*ip_mrouter_set)(struct socket *, struct sockopt *); 95int (*ip_mrouter_get)(struct socket *, struct sockopt *); 96int (*ip_mrouter_done)(void); 97int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 98 struct ip_moptions *); 99int (*mrt_ioctl)(int, caddr_t); 100int (*legal_vif_num)(int); 101u_long (*ip_mcast_src)(int); 102 103void (*rsvp_input_p)(struct mbuf *m, int off); 104int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 105void (*ip_rsvp_force_done)(struct socket *); 106 107/* 108 * Nominal space allocated to a raw ip socket. 109 */ 110#define RIPSNDQ 8192 111#define RIPRCVQ 8192 112 113/* 114 * Raw interface to IP protocol. 115 */ 116 117/* 118 * Initialize raw connection block q. 119 */ 120void 121rip_init() 122{ 123 INP_INFO_LOCK_INIT(&ripcbinfo, "rip"); 124 LIST_INIT(&ripcb); 125 ripcbinfo.listhead = &ripcb; 126 /* 127 * XXX We don't use the hash list for raw IP, but it's easier 128 * to allocate a one entry hash list than it is to check all 129 * over the place for hashbase == NULL. 130 */ 131 ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask); 132 ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask); 133 ripcbinfo.ipi_zone = uma_zcreate("ripcb", sizeof(struct inpcb), 134 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 135 uma_zone_set_max(ripcbinfo.ipi_zone, maxsockets); 136} 137 138static struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET }; 139 140static int 141raw_append(struct inpcb *last, struct ip *ip, struct mbuf *n) 142{ 143 int policyfail = 0; 144 145 INP_LOCK_ASSERT(last); 146 147#if defined(IPSEC) || defined(FAST_IPSEC) 148 /* check AH/ESP integrity. */ 149 if (ipsec4_in_reject(n, last)) { 150 policyfail = 1; 151#ifdef IPSEC 152 ipsecstat.in_polvio++; 153#endif /*IPSEC*/ 154 /* do not inject data to pcb */ 155 } 156#endif /*IPSEC || FAST_IPSEC*/ 157#ifdef MAC 158 if (!policyfail && mac_check_inpcb_deliver(last, n) != 0) 159 policyfail = 1; 160#endif 161 if (!policyfail) { 162 struct mbuf *opts = NULL;
| 31 */ 32 33#include "opt_inet6.h" 34#include "opt_ipsec.h" 35#include "opt_mac.h" 36#include "opt_random_ip_id.h" 37 38#include <sys/param.h> 39#include <sys/jail.h> 40#include <sys/kernel.h> 41#include <sys/lock.h> 42#include <sys/mac.h> 43#include <sys/malloc.h> 44#include <sys/mbuf.h> 45#include <sys/proc.h> 46#include <sys/protosw.h> 47#include <sys/signalvar.h> 48#include <sys/socket.h> 49#include <sys/socketvar.h> 50#include <sys/sx.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53 54#include <vm/uma.h> 55 56#include <net/if.h> 57#include <net/route.h> 58 59#include <netinet/in.h> 60#include <netinet/in_systm.h> 61#include <netinet/in_pcb.h> 62#include <netinet/in_var.h> 63#include <netinet/ip.h> 64#include <netinet/ip_var.h> 65#include <netinet/ip_mroute.h> 66 67#include <netinet/ip_fw.h> 68#include <netinet/ip_dummynet.h> 69 70#ifdef FAST_IPSEC 71#include <netipsec/ipsec.h> 72#endif /*FAST_IPSEC*/ 73 74#ifdef IPSEC 75#include <netinet6/ipsec.h> 76#endif /*IPSEC*/ 77 78struct inpcbhead ripcb; 79struct inpcbinfo ripcbinfo; 80 81/* control hooks for ipfw and dummynet */ 82ip_fw_ctl_t *ip_fw_ctl_ptr; 83ip_dn_ctl_t *ip_dn_ctl_ptr; 84 85/* 86 * hooks for multicast routing. They all default to NULL, 87 * so leave them not initialized and rely on BSS being set to 0. 88 */ 89 90/* The socket used to communicate with the multicast routing daemon. */ 91struct socket *ip_mrouter; 92 93/* The various mrouter and rsvp functions */ 94int (*ip_mrouter_set)(struct socket *, struct sockopt *); 95int (*ip_mrouter_get)(struct socket *, struct sockopt *); 96int (*ip_mrouter_done)(void); 97int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 98 struct ip_moptions *); 99int (*mrt_ioctl)(int, caddr_t); 100int (*legal_vif_num)(int); 101u_long (*ip_mcast_src)(int); 102 103void (*rsvp_input_p)(struct mbuf *m, int off); 104int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 105void (*ip_rsvp_force_done)(struct socket *); 106 107/* 108 * Nominal space allocated to a raw ip socket. 109 */ 110#define RIPSNDQ 8192 111#define RIPRCVQ 8192 112 113/* 114 * Raw interface to IP protocol. 115 */ 116 117/* 118 * Initialize raw connection block q. 119 */ 120void 121rip_init() 122{ 123 INP_INFO_LOCK_INIT(&ripcbinfo, "rip"); 124 LIST_INIT(&ripcb); 125 ripcbinfo.listhead = &ripcb; 126 /* 127 * XXX We don't use the hash list for raw IP, but it's easier 128 * to allocate a one entry hash list than it is to check all 129 * over the place for hashbase == NULL. 130 */ 131 ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask); 132 ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask); 133 ripcbinfo.ipi_zone = uma_zcreate("ripcb", sizeof(struct inpcb), 134 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 135 uma_zone_set_max(ripcbinfo.ipi_zone, maxsockets); 136} 137 138static struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET }; 139 140static int 141raw_append(struct inpcb *last, struct ip *ip, struct mbuf *n) 142{ 143 int policyfail = 0; 144 145 INP_LOCK_ASSERT(last); 146 147#if defined(IPSEC) || defined(FAST_IPSEC) 148 /* check AH/ESP integrity. */ 149 if (ipsec4_in_reject(n, last)) { 150 policyfail = 1; 151#ifdef IPSEC 152 ipsecstat.in_polvio++; 153#endif /*IPSEC*/ 154 /* do not inject data to pcb */ 155 } 156#endif /*IPSEC || FAST_IPSEC*/ 157#ifdef MAC 158 if (!policyfail && mac_check_inpcb_deliver(last, n) != 0) 159 policyfail = 1; 160#endif 161 if (!policyfail) { 162 struct mbuf *opts = NULL;
|
175 } else 176 m_freem(n); 177 return policyfail; 178} 179 180/* 181 * Setup generic address and protocol structures 182 * for raw_input routine, then pass them along with 183 * mbuf chain. 184 */ 185void 186rip_input(struct mbuf *m, int off) 187{ 188 struct ip *ip = mtod(m, struct ip *); 189 int proto = ip->ip_p; 190 struct inpcb *inp, *last; 191 192 INP_INFO_RLOCK(&ripcbinfo); 193 ripsrc.sin_addr = ip->ip_src; 194 last = NULL; 195 LIST_FOREACH(inp, &ripcb, inp_list) { 196 INP_LOCK(inp); 197 if (inp->inp_ip_p && inp->inp_ip_p != proto) { 198 docontinue: 199 INP_UNLOCK(inp); 200 continue; 201 } 202#ifdef INET6 203 if ((inp->inp_vflag & INP_IPV4) == 0) 204 goto docontinue; 205#endif 206 if (inp->inp_laddr.s_addr && 207 inp->inp_laddr.s_addr != ip->ip_dst.s_addr) 208 goto docontinue; 209 if (inp->inp_faddr.s_addr && 210 inp->inp_faddr.s_addr != ip->ip_src.s_addr) 211 goto docontinue; 212 if (jailed(inp->inp_socket->so_cred)) 213 if (htonl(prison_getip(inp->inp_socket->so_cred)) != 214 ip->ip_dst.s_addr) 215 goto docontinue; 216 if (last) { 217 struct mbuf *n; 218 219 n = m_copy(m, 0, (int)M_COPYALL); 220 if (n != NULL) 221 (void) raw_append(last, ip, n); 222 /* XXX count dropped packet */ 223 INP_UNLOCK(last); 224 } 225 last = inp; 226 } 227 if (last != NULL) { 228 if (raw_append(last, ip, m) != 0) 229 ipstat.ips_delivered--; 230 INP_UNLOCK(last); 231 } else { 232 m_freem(m); 233 ipstat.ips_noproto++; 234 ipstat.ips_delivered--; 235 } 236 INP_INFO_RUNLOCK(&ripcbinfo); 237} 238 239/* 240 * Generate IP header and pass packet to ip_output. 241 * Tack on options user may have setup with control call. 242 */ 243int 244rip_output(struct mbuf *m, struct socket *so, u_long dst) 245{ 246 struct ip *ip; 247 int error; 248 struct inpcb *inp = sotoinpcb(so); 249 int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST; 250 251 /* 252 * If the user handed us a complete IP packet, use it. 253 * Otherwise, allocate an mbuf for a header and fill it in. 254 */ 255 if ((inp->inp_flags & INP_HDRINCL) == 0) { 256 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) { 257 m_freem(m); 258 return(EMSGSIZE); 259 } 260 M_PREPEND(m, sizeof(struct ip), M_TRYWAIT); 261 if (m == NULL) 262 return(ENOBUFS); 263 264 INP_LOCK(inp); 265 ip = mtod(m, struct ip *); 266 ip->ip_tos = inp->inp_ip_tos; 267 ip->ip_off = 0; 268 ip->ip_p = inp->inp_ip_p; 269 ip->ip_len = m->m_pkthdr.len; 270 if (jailed(inp->inp_socket->so_cred)) 271 ip->ip_src.s_addr = 272 htonl(prison_getip(inp->inp_socket->so_cred)); 273 else 274 ip->ip_src = inp->inp_laddr; 275 ip->ip_dst.s_addr = dst; 276 ip->ip_ttl = inp->inp_ip_ttl; 277 } else { 278 if (m->m_pkthdr.len > IP_MAXPACKET) { 279 m_freem(m); 280 return(EMSGSIZE); 281 } 282 INP_LOCK(inp); 283 ip = mtod(m, struct ip *); 284 if (jailed(inp->inp_socket->so_cred)) { 285 if (ip->ip_src.s_addr != 286 htonl(prison_getip(inp->inp_socket->so_cred))) { 287 INP_UNLOCK(inp); 288 m_freem(m); 289 return (EPERM); 290 } 291 } 292 /* don't allow both user specified and setsockopt options, 293 and don't allow packet length sizes that will crash */ 294 if (((ip->ip_hl != (sizeof (*ip) >> 2)) 295 && inp->inp_options) 296 || (ip->ip_len > m->m_pkthdr.len) 297 || (ip->ip_len < (ip->ip_hl << 2))) { 298 INP_UNLOCK(inp); 299 m_freem(m); 300 return EINVAL; 301 } 302 if (ip->ip_id == 0) 303#ifdef RANDOM_IP_ID 304 ip->ip_id = ip_randomid(); 305#else 306 ip->ip_id = htons(ip_id++); 307#endif 308 /* XXX prevent ip_output from overwriting header fields */ 309 flags |= IP_RAWOUTPUT; 310 ipstat.ips_rawout++; 311 } 312 313 if (inp->inp_flags & INP_ONESBCAST) 314 flags |= IP_SENDONES; 315 316#ifdef MAC 317 mac_create_mbuf_from_inpcb(inp, m); 318#endif 319 320 error = ip_output(m, inp->inp_options, NULL, flags, 321 inp->inp_moptions, inp); 322 INP_UNLOCK(inp); 323 return error; 324} 325 326/* 327 * Raw IP socket option processing. 328 * 329 * Note that access to all of the IP administrative functions here is 330 * implicitly protected by suser() as gaining access to a raw socket 331 * requires either that the thread pass a suser() check, or that it be 332 * passed a raw socket by another thread that has passed a suser() check. 333 * If FreeBSD moves to a more fine-grained access control mechanism, 334 * additional checks will need to be placed here if the raw IP attachment 335 * check is not equivilent the the check required for these 336 * administrative operations; in some cases, these checks are already 337 * present. 338 */ 339int 340rip_ctloutput(struct socket *so, struct sockopt *sopt) 341{ 342 struct inpcb *inp = sotoinpcb(so); 343 int error, optval; 344 345 if (sopt->sopt_level != IPPROTO_IP) 346 return (EINVAL); 347 348 error = 0; 349 350 switch (sopt->sopt_dir) { 351 case SOPT_GET: 352 switch (sopt->sopt_name) { 353 case IP_HDRINCL: 354 optval = inp->inp_flags & INP_HDRINCL; 355 error = sooptcopyout(sopt, &optval, sizeof optval); 356 break; 357 358 case IP_FW_ADD: /* ADD actually returns the body... */ 359 case IP_FW_GET: 360 case IP_FW_TABLE_GETSIZE: 361 case IP_FW_TABLE_LIST: 362 if (IPFW_LOADED) 363 error = ip_fw_ctl_ptr(sopt); 364 else 365 error = ENOPROTOOPT; 366 break; 367 368 case IP_DUMMYNET_GET: 369 if (DUMMYNET_LOADED) 370 error = ip_dn_ctl_ptr(sopt); 371 else 372 error = ENOPROTOOPT; 373 break ; 374 375 case MRT_INIT: 376 case MRT_DONE: 377 case MRT_ADD_VIF: 378 case MRT_DEL_VIF: 379 case MRT_ADD_MFC: 380 case MRT_DEL_MFC: 381 case MRT_VERSION: 382 case MRT_ASSERT: 383 case MRT_API_SUPPORT: 384 case MRT_API_CONFIG: 385 case MRT_ADD_BW_UPCALL: 386 case MRT_DEL_BW_UPCALL: 387 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) : 388 EOPNOTSUPP; 389 break; 390 391 default: 392 error = ip_ctloutput(so, sopt); 393 break; 394 } 395 break; 396 397 case SOPT_SET: 398 switch (sopt->sopt_name) { 399 case IP_HDRINCL: 400 error = sooptcopyin(sopt, &optval, sizeof optval, 401 sizeof optval); 402 if (error) 403 break; 404 if (optval) 405 inp->inp_flags |= INP_HDRINCL; 406 else 407 inp->inp_flags &= ~INP_HDRINCL; 408 break; 409 410 case IP_FW_ADD: 411 case IP_FW_DEL: 412 case IP_FW_FLUSH: 413 case IP_FW_ZERO: 414 case IP_FW_RESETLOG: 415 case IP_FW_TABLE_ADD: 416 case IP_FW_TABLE_DEL: 417 case IP_FW_TABLE_FLUSH: 418 if (IPFW_LOADED) 419 error = ip_fw_ctl_ptr(sopt); 420 else 421 error = ENOPROTOOPT; 422 break; 423 424 case IP_DUMMYNET_CONFIGURE: 425 case IP_DUMMYNET_DEL: 426 case IP_DUMMYNET_FLUSH: 427 if (DUMMYNET_LOADED) 428 error = ip_dn_ctl_ptr(sopt); 429 else 430 error = ENOPROTOOPT ; 431 break ; 432 433 case IP_RSVP_ON: 434 error = ip_rsvp_init(so); 435 break; 436 437 case IP_RSVP_OFF: 438 error = ip_rsvp_done(); 439 break; 440 441 case IP_RSVP_VIF_ON: 442 case IP_RSVP_VIF_OFF: 443 error = ip_rsvp_vif ? 444 ip_rsvp_vif(so, sopt) : EINVAL; 445 break; 446 447 case MRT_INIT: 448 case MRT_DONE: 449 case MRT_ADD_VIF: 450 case MRT_DEL_VIF: 451 case MRT_ADD_MFC: 452 case MRT_DEL_MFC: 453 case MRT_VERSION: 454 case MRT_ASSERT: 455 case MRT_API_SUPPORT: 456 case MRT_API_CONFIG: 457 case MRT_ADD_BW_UPCALL: 458 case MRT_DEL_BW_UPCALL: 459 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) : 460 EOPNOTSUPP; 461 break; 462 463 default: 464 error = ip_ctloutput(so, sopt); 465 break; 466 } 467 break; 468 } 469 470 return (error); 471} 472 473/* 474 * This function exists solely to receive the PRC_IFDOWN messages which 475 * are sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, 476 * and calls in_ifadown() to remove all routes corresponding to that address. 477 * It also receives the PRC_IFUP messages from if_up() and reinstalls the 478 * interface routes. 479 */ 480void 481rip_ctlinput(int cmd, struct sockaddr *sa, void *vip) 482{ 483 struct in_ifaddr *ia; 484 struct ifnet *ifp; 485 int err; 486 int flags; 487 488 switch (cmd) { 489 case PRC_IFDOWN: 490 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 491 if (ia->ia_ifa.ifa_addr == sa 492 && (ia->ia_flags & IFA_ROUTE)) { 493 /* 494 * in_ifscrub kills the interface route. 495 */ 496 in_ifscrub(ia->ia_ifp, ia); 497 /* 498 * in_ifadown gets rid of all the rest of 499 * the routes. This is not quite the right 500 * thing to do, but at least if we are running 501 * a routing process they will come back. 502 */ 503 in_ifadown(&ia->ia_ifa, 0); 504 break; 505 } 506 } 507 break; 508 509 case PRC_IFUP: 510 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 511 if (ia->ia_ifa.ifa_addr == sa) 512 break; 513 } 514 if (ia == 0 || (ia->ia_flags & IFA_ROUTE)) 515 return; 516 flags = RTF_UP; 517 ifp = ia->ia_ifa.ifa_ifp; 518 519 if ((ifp->if_flags & IFF_LOOPBACK) 520 || (ifp->if_flags & IFF_POINTOPOINT)) 521 flags |= RTF_HOST; 522 523 err = rtinit(&ia->ia_ifa, RTM_ADD, flags); 524 if (err == 0) 525 ia->ia_flags |= IFA_ROUTE; 526 break; 527 } 528} 529 530u_long rip_sendspace = RIPSNDQ; 531u_long rip_recvspace = RIPRCVQ; 532 533SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, 534 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size"); 535SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, 536 &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams"); 537 538static int 539rip_attach(struct socket *so, int proto, struct thread *td) 540{ 541 struct inpcb *inp; 542 int error; 543 544 /* XXX why not lower? */ 545 INP_INFO_WLOCK(&ripcbinfo); 546 inp = sotoinpcb(so); 547 if (inp) { 548 /* XXX counter, printf */ 549 INP_INFO_WUNLOCK(&ripcbinfo); 550 return EINVAL; 551 } 552 if (td && jailed(td->td_ucred) && !jail_allow_raw_sockets) { 553 INP_INFO_WUNLOCK(&ripcbinfo); 554 return (EPERM); 555 } 556 if (td && (error = suser_cred(td->td_ucred, PRISON_ROOT)) != 0) { 557 INP_INFO_WUNLOCK(&ripcbinfo); 558 return error; 559 } 560 if (proto >= IPPROTO_MAX || proto < 0) { 561 INP_INFO_WUNLOCK(&ripcbinfo); 562 return EPROTONOSUPPORT; 563 } 564 565 error = soreserve(so, rip_sendspace, rip_recvspace); 566 if (error) { 567 INP_INFO_WUNLOCK(&ripcbinfo); 568 return error; 569 } 570 error = in_pcballoc(so, &ripcbinfo, "rawinp"); 571 if (error) { 572 INP_INFO_WUNLOCK(&ripcbinfo); 573 return error; 574 } 575 inp = (struct inpcb *)so->so_pcb; 576 INP_LOCK(inp); 577 INP_INFO_WUNLOCK(&ripcbinfo); 578 inp->inp_vflag |= INP_IPV4; 579 inp->inp_ip_p = proto; 580 inp->inp_ip_ttl = ip_defttl; 581 INP_UNLOCK(inp); 582 return 0; 583} 584 585static void 586rip_pcbdetach(struct socket *so, struct inpcb *inp) 587{ 588 INP_INFO_WLOCK_ASSERT(&ripcbinfo); 589 INP_LOCK_ASSERT(inp); 590 591 if (so == ip_mrouter && ip_mrouter_done) 592 ip_mrouter_done(); 593 if (ip_rsvp_force_done) 594 ip_rsvp_force_done(so); 595 if (so == ip_rsvpd) 596 ip_rsvp_done(); 597 in_pcbdetach(inp); 598} 599 600static int 601rip_detach(struct socket *so) 602{ 603 struct inpcb *inp; 604 605 INP_INFO_WLOCK(&ripcbinfo); 606 inp = sotoinpcb(so); 607 if (inp == 0) { 608 /* XXX counter, printf */ 609 INP_INFO_WUNLOCK(&ripcbinfo); 610 return EINVAL; 611 } 612 INP_LOCK(inp); 613 rip_pcbdetach(so, inp); 614 INP_INFO_WUNLOCK(&ripcbinfo); 615 return 0; 616} 617 618static int 619rip_abort(struct socket *so) 620{ 621 struct inpcb *inp; 622 623 INP_INFO_WLOCK(&ripcbinfo); 624 inp = sotoinpcb(so); 625 if (inp == 0) { 626 INP_INFO_WUNLOCK(&ripcbinfo); 627 return EINVAL; /* ??? possible? panic instead? */ 628 } 629 INP_LOCK(inp); 630 soisdisconnected(so); 631 if (so->so_state & SS_NOFDREF) 632 rip_pcbdetach(so, inp); 633 else 634 INP_UNLOCK(inp); 635 INP_INFO_WUNLOCK(&ripcbinfo); 636 return 0; 637} 638 639static int 640rip_disconnect(struct socket *so) 641{ 642 if ((so->so_state & SS_ISCONNECTED) == 0) 643 return ENOTCONN; 644 return rip_abort(so); 645} 646 647static int 648rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 649{ 650 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 651 struct inpcb *inp; 652 653 if (nam->sa_len != sizeof(*addr)) 654 return EINVAL; 655 656 if (jailed(td->td_ucred)) { 657 if (addr->sin_addr.s_addr == INADDR_ANY) 658 addr->sin_addr.s_addr = 659 htonl(prison_getip(td->td_ucred)); 660 if (htonl(prison_getip(td->td_ucred)) != addr->sin_addr.s_addr) 661 return (EADDRNOTAVAIL); 662 } 663 664 if (TAILQ_EMPTY(&ifnet) || 665 (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) || 666 (addr->sin_addr.s_addr && 667 ifa_ifwithaddr((struct sockaddr *)addr) == 0)) 668 return EADDRNOTAVAIL; 669 670 INP_INFO_WLOCK(&ripcbinfo); 671 inp = sotoinpcb(so); 672 if (inp == 0) { 673 INP_INFO_WUNLOCK(&ripcbinfo); 674 return EINVAL; 675 } 676 INP_LOCK(inp); 677 inp->inp_laddr = addr->sin_addr; 678 INP_UNLOCK(inp); 679 INP_INFO_WUNLOCK(&ripcbinfo); 680 return 0; 681} 682 683static int 684rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 685{ 686 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 687 struct inpcb *inp; 688 689 if (nam->sa_len != sizeof(*addr)) 690 return EINVAL; 691 if (TAILQ_EMPTY(&ifnet)) 692 return EADDRNOTAVAIL; 693 if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) 694 return EAFNOSUPPORT; 695 696 INP_INFO_WLOCK(&ripcbinfo); 697 inp = sotoinpcb(so); 698 if (inp == 0) { 699 INP_INFO_WUNLOCK(&ripcbinfo); 700 return EINVAL; 701 } 702 INP_LOCK(inp); 703 inp->inp_faddr = addr->sin_addr; 704 soisconnected(so); 705 INP_UNLOCK(inp); 706 INP_INFO_WUNLOCK(&ripcbinfo); 707 return 0; 708} 709 710static int 711rip_shutdown(struct socket *so) 712{ 713 struct inpcb *inp; 714 715 INP_INFO_RLOCK(&ripcbinfo); 716 inp = sotoinpcb(so); 717 if (inp == 0) { 718 INP_INFO_RUNLOCK(&ripcbinfo); 719 return EINVAL; 720 } 721 INP_LOCK(inp); 722 INP_INFO_RUNLOCK(&ripcbinfo); 723 socantsendmore(so); 724 INP_UNLOCK(inp); 725 return 0; 726} 727 728static int 729rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 730 struct mbuf *control, struct thread *td) 731{ 732 struct inpcb *inp; 733 u_long dst; 734 int ret; 735 736 INP_INFO_WLOCK(&ripcbinfo); 737 inp = sotoinpcb(so); 738 if (so->so_state & SS_ISCONNECTED) { 739 if (nam) { 740 INP_INFO_WUNLOCK(&ripcbinfo); 741 m_freem(m); 742 return EISCONN; 743 } 744 dst = inp->inp_faddr.s_addr; 745 } else { 746 if (nam == NULL) { 747 INP_INFO_WUNLOCK(&ripcbinfo); 748 m_freem(m); 749 return ENOTCONN; 750 } 751 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr; 752 } 753 ret = rip_output(m, so, dst); 754 INP_INFO_WUNLOCK(&ripcbinfo); 755 return ret; 756} 757 758static int 759rip_pcblist(SYSCTL_HANDLER_ARGS) 760{ 761 int error, i, n; 762 struct inpcb *inp, **inp_list; 763 inp_gen_t gencnt; 764 struct xinpgen xig; 765 766 /* 767 * The process of preparing the TCB list is too time-consuming and 768 * resource-intensive to repeat twice on every request. 769 */ 770 if (req->oldptr == 0) { 771 n = ripcbinfo.ipi_count; 772 req->oldidx = 2 * (sizeof xig) 773 + (n + n/8) * sizeof(struct xinpcb); 774 return 0; 775 } 776 777 if (req->newptr != 0) 778 return EPERM; 779 780 /* 781 * OK, now we're committed to doing something. 782 */ 783 INP_INFO_RLOCK(&ripcbinfo); 784 gencnt = ripcbinfo.ipi_gencnt; 785 n = ripcbinfo.ipi_count; 786 INP_INFO_RUNLOCK(&ripcbinfo); 787 788 xig.xig_len = sizeof xig; 789 xig.xig_count = n; 790 xig.xig_gen = gencnt; 791 xig.xig_sogen = so_gencnt; 792 error = SYSCTL_OUT(req, &xig, sizeof xig); 793 if (error) 794 return error; 795 796 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK); 797 if (inp_list == 0) 798 return ENOMEM; 799 800 INP_INFO_RLOCK(&ripcbinfo); 801 for (inp = LIST_FIRST(ripcbinfo.listhead), i = 0; inp && i < n; 802 inp = LIST_NEXT(inp, inp_list)) { 803 INP_LOCK(inp); 804 if (inp->inp_gencnt <= gencnt && 805 cr_canseesocket(req->td->td_ucred, inp->inp_socket) == 0) { 806 /* XXX held references? */ 807 inp_list[i++] = inp; 808 } 809 INP_UNLOCK(inp); 810 } 811 INP_INFO_RUNLOCK(&ripcbinfo); 812 n = i; 813 814 error = 0; 815 for (i = 0; i < n; i++) { 816 inp = inp_list[i]; 817 if (inp->inp_gencnt <= gencnt) { 818 struct xinpcb xi; 819 xi.xi_len = sizeof xi; 820 /* XXX should avoid extra copy */ 821 bcopy(inp, &xi.xi_inp, sizeof *inp); 822 if (inp->inp_socket) 823 sotoxsocket(inp->inp_socket, &xi.xi_socket); 824 error = SYSCTL_OUT(req, &xi, sizeof xi); 825 } 826 } 827 if (!error) { 828 /* 829 * Give the user an updated idea of our state. 830 * If the generation differs from what we told 831 * her before, she knows that something happened 832 * while we were processing this request, and it 833 * might be necessary to retry. 834 */ 835 INP_INFO_RLOCK(&ripcbinfo); 836 xig.xig_gen = ripcbinfo.ipi_gencnt; 837 xig.xig_sogen = so_gencnt; 838 xig.xig_count = ripcbinfo.ipi_count; 839 INP_INFO_RUNLOCK(&ripcbinfo); 840 error = SYSCTL_OUT(req, &xig, sizeof xig); 841 } 842 free(inp_list, M_TEMP); 843 return error; 844} 845 846/* 847 * This is the wrapper function for in_setsockaddr. We just pass down 848 * the pcbinfo for in_setpeeraddr to lock. 849 */ 850static int 851rip_sockaddr(struct socket *so, struct sockaddr **nam) 852{ 853 return (in_setsockaddr(so, nam, &ripcbinfo)); 854} 855 856/* 857 * This is the wrapper function for in_setpeeraddr. We just pass down 858 * the pcbinfo for in_setpeeraddr to lock. 859 */ 860static int 861rip_peeraddr(struct socket *so, struct sockaddr **nam) 862{ 863 return (in_setpeeraddr(so, nam, &ripcbinfo)); 864} 865 866 867SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0, 868 rip_pcblist, "S,xinpcb", "List of active raw IP sockets"); 869 870struct pr_usrreqs rip_usrreqs = { 871 rip_abort, pru_accept_notsupp, rip_attach, rip_bind, rip_connect, 872 pru_connect2_notsupp, in_control, rip_detach, rip_disconnect, 873 pru_listen_notsupp, rip_peeraddr, pru_rcvd_notsupp, 874 pru_rcvoob_notsupp, rip_send, pru_sense_null, rip_shutdown, 875 rip_sockaddr, sosend, soreceive, sopoll, in_pcbsosetlabel 876};
| 179 } else 180 m_freem(n); 181 return policyfail; 182} 183 184/* 185 * Setup generic address and protocol structures 186 * for raw_input routine, then pass them along with 187 * mbuf chain. 188 */ 189void 190rip_input(struct mbuf *m, int off) 191{ 192 struct ip *ip = mtod(m, struct ip *); 193 int proto = ip->ip_p; 194 struct inpcb *inp, *last; 195 196 INP_INFO_RLOCK(&ripcbinfo); 197 ripsrc.sin_addr = ip->ip_src; 198 last = NULL; 199 LIST_FOREACH(inp, &ripcb, inp_list) { 200 INP_LOCK(inp); 201 if (inp->inp_ip_p && inp->inp_ip_p != proto) { 202 docontinue: 203 INP_UNLOCK(inp); 204 continue; 205 } 206#ifdef INET6 207 if ((inp->inp_vflag & INP_IPV4) == 0) 208 goto docontinue; 209#endif 210 if (inp->inp_laddr.s_addr && 211 inp->inp_laddr.s_addr != ip->ip_dst.s_addr) 212 goto docontinue; 213 if (inp->inp_faddr.s_addr && 214 inp->inp_faddr.s_addr != ip->ip_src.s_addr) 215 goto docontinue; 216 if (jailed(inp->inp_socket->so_cred)) 217 if (htonl(prison_getip(inp->inp_socket->so_cred)) != 218 ip->ip_dst.s_addr) 219 goto docontinue; 220 if (last) { 221 struct mbuf *n; 222 223 n = m_copy(m, 0, (int)M_COPYALL); 224 if (n != NULL) 225 (void) raw_append(last, ip, n); 226 /* XXX count dropped packet */ 227 INP_UNLOCK(last); 228 } 229 last = inp; 230 } 231 if (last != NULL) { 232 if (raw_append(last, ip, m) != 0) 233 ipstat.ips_delivered--; 234 INP_UNLOCK(last); 235 } else { 236 m_freem(m); 237 ipstat.ips_noproto++; 238 ipstat.ips_delivered--; 239 } 240 INP_INFO_RUNLOCK(&ripcbinfo); 241} 242 243/* 244 * Generate IP header and pass packet to ip_output. 245 * Tack on options user may have setup with control call. 246 */ 247int 248rip_output(struct mbuf *m, struct socket *so, u_long dst) 249{ 250 struct ip *ip; 251 int error; 252 struct inpcb *inp = sotoinpcb(so); 253 int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST; 254 255 /* 256 * If the user handed us a complete IP packet, use it. 257 * Otherwise, allocate an mbuf for a header and fill it in. 258 */ 259 if ((inp->inp_flags & INP_HDRINCL) == 0) { 260 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) { 261 m_freem(m); 262 return(EMSGSIZE); 263 } 264 M_PREPEND(m, sizeof(struct ip), M_TRYWAIT); 265 if (m == NULL) 266 return(ENOBUFS); 267 268 INP_LOCK(inp); 269 ip = mtod(m, struct ip *); 270 ip->ip_tos = inp->inp_ip_tos; 271 ip->ip_off = 0; 272 ip->ip_p = inp->inp_ip_p; 273 ip->ip_len = m->m_pkthdr.len; 274 if (jailed(inp->inp_socket->so_cred)) 275 ip->ip_src.s_addr = 276 htonl(prison_getip(inp->inp_socket->so_cred)); 277 else 278 ip->ip_src = inp->inp_laddr; 279 ip->ip_dst.s_addr = dst; 280 ip->ip_ttl = inp->inp_ip_ttl; 281 } else { 282 if (m->m_pkthdr.len > IP_MAXPACKET) { 283 m_freem(m); 284 return(EMSGSIZE); 285 } 286 INP_LOCK(inp); 287 ip = mtod(m, struct ip *); 288 if (jailed(inp->inp_socket->so_cred)) { 289 if (ip->ip_src.s_addr != 290 htonl(prison_getip(inp->inp_socket->so_cred))) { 291 INP_UNLOCK(inp); 292 m_freem(m); 293 return (EPERM); 294 } 295 } 296 /* don't allow both user specified and setsockopt options, 297 and don't allow packet length sizes that will crash */ 298 if (((ip->ip_hl != (sizeof (*ip) >> 2)) 299 && inp->inp_options) 300 || (ip->ip_len > m->m_pkthdr.len) 301 || (ip->ip_len < (ip->ip_hl << 2))) { 302 INP_UNLOCK(inp); 303 m_freem(m); 304 return EINVAL; 305 } 306 if (ip->ip_id == 0) 307#ifdef RANDOM_IP_ID 308 ip->ip_id = ip_randomid(); 309#else 310 ip->ip_id = htons(ip_id++); 311#endif 312 /* XXX prevent ip_output from overwriting header fields */ 313 flags |= IP_RAWOUTPUT; 314 ipstat.ips_rawout++; 315 } 316 317 if (inp->inp_flags & INP_ONESBCAST) 318 flags |= IP_SENDONES; 319 320#ifdef MAC 321 mac_create_mbuf_from_inpcb(inp, m); 322#endif 323 324 error = ip_output(m, inp->inp_options, NULL, flags, 325 inp->inp_moptions, inp); 326 INP_UNLOCK(inp); 327 return error; 328} 329 330/* 331 * Raw IP socket option processing. 332 * 333 * Note that access to all of the IP administrative functions here is 334 * implicitly protected by suser() as gaining access to a raw socket 335 * requires either that the thread pass a suser() check, or that it be 336 * passed a raw socket by another thread that has passed a suser() check. 337 * If FreeBSD moves to a more fine-grained access control mechanism, 338 * additional checks will need to be placed here if the raw IP attachment 339 * check is not equivilent the the check required for these 340 * administrative operations; in some cases, these checks are already 341 * present. 342 */ 343int 344rip_ctloutput(struct socket *so, struct sockopt *sopt) 345{ 346 struct inpcb *inp = sotoinpcb(so); 347 int error, optval; 348 349 if (sopt->sopt_level != IPPROTO_IP) 350 return (EINVAL); 351 352 error = 0; 353 354 switch (sopt->sopt_dir) { 355 case SOPT_GET: 356 switch (sopt->sopt_name) { 357 case IP_HDRINCL: 358 optval = inp->inp_flags & INP_HDRINCL; 359 error = sooptcopyout(sopt, &optval, sizeof optval); 360 break; 361 362 case IP_FW_ADD: /* ADD actually returns the body... */ 363 case IP_FW_GET: 364 case IP_FW_TABLE_GETSIZE: 365 case IP_FW_TABLE_LIST: 366 if (IPFW_LOADED) 367 error = ip_fw_ctl_ptr(sopt); 368 else 369 error = ENOPROTOOPT; 370 break; 371 372 case IP_DUMMYNET_GET: 373 if (DUMMYNET_LOADED) 374 error = ip_dn_ctl_ptr(sopt); 375 else 376 error = ENOPROTOOPT; 377 break ; 378 379 case MRT_INIT: 380 case MRT_DONE: 381 case MRT_ADD_VIF: 382 case MRT_DEL_VIF: 383 case MRT_ADD_MFC: 384 case MRT_DEL_MFC: 385 case MRT_VERSION: 386 case MRT_ASSERT: 387 case MRT_API_SUPPORT: 388 case MRT_API_CONFIG: 389 case MRT_ADD_BW_UPCALL: 390 case MRT_DEL_BW_UPCALL: 391 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) : 392 EOPNOTSUPP; 393 break; 394 395 default: 396 error = ip_ctloutput(so, sopt); 397 break; 398 } 399 break; 400 401 case SOPT_SET: 402 switch (sopt->sopt_name) { 403 case IP_HDRINCL: 404 error = sooptcopyin(sopt, &optval, sizeof optval, 405 sizeof optval); 406 if (error) 407 break; 408 if (optval) 409 inp->inp_flags |= INP_HDRINCL; 410 else 411 inp->inp_flags &= ~INP_HDRINCL; 412 break; 413 414 case IP_FW_ADD: 415 case IP_FW_DEL: 416 case IP_FW_FLUSH: 417 case IP_FW_ZERO: 418 case IP_FW_RESETLOG: 419 case IP_FW_TABLE_ADD: 420 case IP_FW_TABLE_DEL: 421 case IP_FW_TABLE_FLUSH: 422 if (IPFW_LOADED) 423 error = ip_fw_ctl_ptr(sopt); 424 else 425 error = ENOPROTOOPT; 426 break; 427 428 case IP_DUMMYNET_CONFIGURE: 429 case IP_DUMMYNET_DEL: 430 case IP_DUMMYNET_FLUSH: 431 if (DUMMYNET_LOADED) 432 error = ip_dn_ctl_ptr(sopt); 433 else 434 error = ENOPROTOOPT ; 435 break ; 436 437 case IP_RSVP_ON: 438 error = ip_rsvp_init(so); 439 break; 440 441 case IP_RSVP_OFF: 442 error = ip_rsvp_done(); 443 break; 444 445 case IP_RSVP_VIF_ON: 446 case IP_RSVP_VIF_OFF: 447 error = ip_rsvp_vif ? 448 ip_rsvp_vif(so, sopt) : EINVAL; 449 break; 450 451 case MRT_INIT: 452 case MRT_DONE: 453 case MRT_ADD_VIF: 454 case MRT_DEL_VIF: 455 case MRT_ADD_MFC: 456 case MRT_DEL_MFC: 457 case MRT_VERSION: 458 case MRT_ASSERT: 459 case MRT_API_SUPPORT: 460 case MRT_API_CONFIG: 461 case MRT_ADD_BW_UPCALL: 462 case MRT_DEL_BW_UPCALL: 463 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) : 464 EOPNOTSUPP; 465 break; 466 467 default: 468 error = ip_ctloutput(so, sopt); 469 break; 470 } 471 break; 472 } 473 474 return (error); 475} 476 477/* 478 * This function exists solely to receive the PRC_IFDOWN messages which 479 * are sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, 480 * and calls in_ifadown() to remove all routes corresponding to that address. 481 * It also receives the PRC_IFUP messages from if_up() and reinstalls the 482 * interface routes. 483 */ 484void 485rip_ctlinput(int cmd, struct sockaddr *sa, void *vip) 486{ 487 struct in_ifaddr *ia; 488 struct ifnet *ifp; 489 int err; 490 int flags; 491 492 switch (cmd) { 493 case PRC_IFDOWN: 494 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 495 if (ia->ia_ifa.ifa_addr == sa 496 && (ia->ia_flags & IFA_ROUTE)) { 497 /* 498 * in_ifscrub kills the interface route. 499 */ 500 in_ifscrub(ia->ia_ifp, ia); 501 /* 502 * in_ifadown gets rid of all the rest of 503 * the routes. This is not quite the right 504 * thing to do, but at least if we are running 505 * a routing process they will come back. 506 */ 507 in_ifadown(&ia->ia_ifa, 0); 508 break; 509 } 510 } 511 break; 512 513 case PRC_IFUP: 514 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) { 515 if (ia->ia_ifa.ifa_addr == sa) 516 break; 517 } 518 if (ia == 0 || (ia->ia_flags & IFA_ROUTE)) 519 return; 520 flags = RTF_UP; 521 ifp = ia->ia_ifa.ifa_ifp; 522 523 if ((ifp->if_flags & IFF_LOOPBACK) 524 || (ifp->if_flags & IFF_POINTOPOINT)) 525 flags |= RTF_HOST; 526 527 err = rtinit(&ia->ia_ifa, RTM_ADD, flags); 528 if (err == 0) 529 ia->ia_flags |= IFA_ROUTE; 530 break; 531 } 532} 533 534u_long rip_sendspace = RIPSNDQ; 535u_long rip_recvspace = RIPRCVQ; 536 537SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, 538 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size"); 539SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, 540 &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams"); 541 542static int 543rip_attach(struct socket *so, int proto, struct thread *td) 544{ 545 struct inpcb *inp; 546 int error; 547 548 /* XXX why not lower? */ 549 INP_INFO_WLOCK(&ripcbinfo); 550 inp = sotoinpcb(so); 551 if (inp) { 552 /* XXX counter, printf */ 553 INP_INFO_WUNLOCK(&ripcbinfo); 554 return EINVAL; 555 } 556 if (td && jailed(td->td_ucred) && !jail_allow_raw_sockets) { 557 INP_INFO_WUNLOCK(&ripcbinfo); 558 return (EPERM); 559 } 560 if (td && (error = suser_cred(td->td_ucred, PRISON_ROOT)) != 0) { 561 INP_INFO_WUNLOCK(&ripcbinfo); 562 return error; 563 } 564 if (proto >= IPPROTO_MAX || proto < 0) { 565 INP_INFO_WUNLOCK(&ripcbinfo); 566 return EPROTONOSUPPORT; 567 } 568 569 error = soreserve(so, rip_sendspace, rip_recvspace); 570 if (error) { 571 INP_INFO_WUNLOCK(&ripcbinfo); 572 return error; 573 } 574 error = in_pcballoc(so, &ripcbinfo, "rawinp"); 575 if (error) { 576 INP_INFO_WUNLOCK(&ripcbinfo); 577 return error; 578 } 579 inp = (struct inpcb *)so->so_pcb; 580 INP_LOCK(inp); 581 INP_INFO_WUNLOCK(&ripcbinfo); 582 inp->inp_vflag |= INP_IPV4; 583 inp->inp_ip_p = proto; 584 inp->inp_ip_ttl = ip_defttl; 585 INP_UNLOCK(inp); 586 return 0; 587} 588 589static void 590rip_pcbdetach(struct socket *so, struct inpcb *inp) 591{ 592 INP_INFO_WLOCK_ASSERT(&ripcbinfo); 593 INP_LOCK_ASSERT(inp); 594 595 if (so == ip_mrouter && ip_mrouter_done) 596 ip_mrouter_done(); 597 if (ip_rsvp_force_done) 598 ip_rsvp_force_done(so); 599 if (so == ip_rsvpd) 600 ip_rsvp_done(); 601 in_pcbdetach(inp); 602} 603 604static int 605rip_detach(struct socket *so) 606{ 607 struct inpcb *inp; 608 609 INP_INFO_WLOCK(&ripcbinfo); 610 inp = sotoinpcb(so); 611 if (inp == 0) { 612 /* XXX counter, printf */ 613 INP_INFO_WUNLOCK(&ripcbinfo); 614 return EINVAL; 615 } 616 INP_LOCK(inp); 617 rip_pcbdetach(so, inp); 618 INP_INFO_WUNLOCK(&ripcbinfo); 619 return 0; 620} 621 622static int 623rip_abort(struct socket *so) 624{ 625 struct inpcb *inp; 626 627 INP_INFO_WLOCK(&ripcbinfo); 628 inp = sotoinpcb(so); 629 if (inp == 0) { 630 INP_INFO_WUNLOCK(&ripcbinfo); 631 return EINVAL; /* ??? possible? panic instead? */ 632 } 633 INP_LOCK(inp); 634 soisdisconnected(so); 635 if (so->so_state & SS_NOFDREF) 636 rip_pcbdetach(so, inp); 637 else 638 INP_UNLOCK(inp); 639 INP_INFO_WUNLOCK(&ripcbinfo); 640 return 0; 641} 642 643static int 644rip_disconnect(struct socket *so) 645{ 646 if ((so->so_state & SS_ISCONNECTED) == 0) 647 return ENOTCONN; 648 return rip_abort(so); 649} 650 651static int 652rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 653{ 654 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 655 struct inpcb *inp; 656 657 if (nam->sa_len != sizeof(*addr)) 658 return EINVAL; 659 660 if (jailed(td->td_ucred)) { 661 if (addr->sin_addr.s_addr == INADDR_ANY) 662 addr->sin_addr.s_addr = 663 htonl(prison_getip(td->td_ucred)); 664 if (htonl(prison_getip(td->td_ucred)) != addr->sin_addr.s_addr) 665 return (EADDRNOTAVAIL); 666 } 667 668 if (TAILQ_EMPTY(&ifnet) || 669 (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) || 670 (addr->sin_addr.s_addr && 671 ifa_ifwithaddr((struct sockaddr *)addr) == 0)) 672 return EADDRNOTAVAIL; 673 674 INP_INFO_WLOCK(&ripcbinfo); 675 inp = sotoinpcb(so); 676 if (inp == 0) { 677 INP_INFO_WUNLOCK(&ripcbinfo); 678 return EINVAL; 679 } 680 INP_LOCK(inp); 681 inp->inp_laddr = addr->sin_addr; 682 INP_UNLOCK(inp); 683 INP_INFO_WUNLOCK(&ripcbinfo); 684 return 0; 685} 686 687static int 688rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 689{ 690 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 691 struct inpcb *inp; 692 693 if (nam->sa_len != sizeof(*addr)) 694 return EINVAL; 695 if (TAILQ_EMPTY(&ifnet)) 696 return EADDRNOTAVAIL; 697 if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) 698 return EAFNOSUPPORT; 699 700 INP_INFO_WLOCK(&ripcbinfo); 701 inp = sotoinpcb(so); 702 if (inp == 0) { 703 INP_INFO_WUNLOCK(&ripcbinfo); 704 return EINVAL; 705 } 706 INP_LOCK(inp); 707 inp->inp_faddr = addr->sin_addr; 708 soisconnected(so); 709 INP_UNLOCK(inp); 710 INP_INFO_WUNLOCK(&ripcbinfo); 711 return 0; 712} 713 714static int 715rip_shutdown(struct socket *so) 716{ 717 struct inpcb *inp; 718 719 INP_INFO_RLOCK(&ripcbinfo); 720 inp = sotoinpcb(so); 721 if (inp == 0) { 722 INP_INFO_RUNLOCK(&ripcbinfo); 723 return EINVAL; 724 } 725 INP_LOCK(inp); 726 INP_INFO_RUNLOCK(&ripcbinfo); 727 socantsendmore(so); 728 INP_UNLOCK(inp); 729 return 0; 730} 731 732static int 733rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 734 struct mbuf *control, struct thread *td) 735{ 736 struct inpcb *inp; 737 u_long dst; 738 int ret; 739 740 INP_INFO_WLOCK(&ripcbinfo); 741 inp = sotoinpcb(so); 742 if (so->so_state & SS_ISCONNECTED) { 743 if (nam) { 744 INP_INFO_WUNLOCK(&ripcbinfo); 745 m_freem(m); 746 return EISCONN; 747 } 748 dst = inp->inp_faddr.s_addr; 749 } else { 750 if (nam == NULL) { 751 INP_INFO_WUNLOCK(&ripcbinfo); 752 m_freem(m); 753 return ENOTCONN; 754 } 755 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr; 756 } 757 ret = rip_output(m, so, dst); 758 INP_INFO_WUNLOCK(&ripcbinfo); 759 return ret; 760} 761 762static int 763rip_pcblist(SYSCTL_HANDLER_ARGS) 764{ 765 int error, i, n; 766 struct inpcb *inp, **inp_list; 767 inp_gen_t gencnt; 768 struct xinpgen xig; 769 770 /* 771 * The process of preparing the TCB list is too time-consuming and 772 * resource-intensive to repeat twice on every request. 773 */ 774 if (req->oldptr == 0) { 775 n = ripcbinfo.ipi_count; 776 req->oldidx = 2 * (sizeof xig) 777 + (n + n/8) * sizeof(struct xinpcb); 778 return 0; 779 } 780 781 if (req->newptr != 0) 782 return EPERM; 783 784 /* 785 * OK, now we're committed to doing something. 786 */ 787 INP_INFO_RLOCK(&ripcbinfo); 788 gencnt = ripcbinfo.ipi_gencnt; 789 n = ripcbinfo.ipi_count; 790 INP_INFO_RUNLOCK(&ripcbinfo); 791 792 xig.xig_len = sizeof xig; 793 xig.xig_count = n; 794 xig.xig_gen = gencnt; 795 xig.xig_sogen = so_gencnt; 796 error = SYSCTL_OUT(req, &xig, sizeof xig); 797 if (error) 798 return error; 799 800 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK); 801 if (inp_list == 0) 802 return ENOMEM; 803 804 INP_INFO_RLOCK(&ripcbinfo); 805 for (inp = LIST_FIRST(ripcbinfo.listhead), i = 0; inp && i < n; 806 inp = LIST_NEXT(inp, inp_list)) { 807 INP_LOCK(inp); 808 if (inp->inp_gencnt <= gencnt && 809 cr_canseesocket(req->td->td_ucred, inp->inp_socket) == 0) { 810 /* XXX held references? */ 811 inp_list[i++] = inp; 812 } 813 INP_UNLOCK(inp); 814 } 815 INP_INFO_RUNLOCK(&ripcbinfo); 816 n = i; 817 818 error = 0; 819 for (i = 0; i < n; i++) { 820 inp = inp_list[i]; 821 if (inp->inp_gencnt <= gencnt) { 822 struct xinpcb xi; 823 xi.xi_len = sizeof xi; 824 /* XXX should avoid extra copy */ 825 bcopy(inp, &xi.xi_inp, sizeof *inp); 826 if (inp->inp_socket) 827 sotoxsocket(inp->inp_socket, &xi.xi_socket); 828 error = SYSCTL_OUT(req, &xi, sizeof xi); 829 } 830 } 831 if (!error) { 832 /* 833 * Give the user an updated idea of our state. 834 * If the generation differs from what we told 835 * her before, she knows that something happened 836 * while we were processing this request, and it 837 * might be necessary to retry. 838 */ 839 INP_INFO_RLOCK(&ripcbinfo); 840 xig.xig_gen = ripcbinfo.ipi_gencnt; 841 xig.xig_sogen = so_gencnt; 842 xig.xig_count = ripcbinfo.ipi_count; 843 INP_INFO_RUNLOCK(&ripcbinfo); 844 error = SYSCTL_OUT(req, &xig, sizeof xig); 845 } 846 free(inp_list, M_TEMP); 847 return error; 848} 849 850/* 851 * This is the wrapper function for in_setsockaddr. We just pass down 852 * the pcbinfo for in_setpeeraddr to lock. 853 */ 854static int 855rip_sockaddr(struct socket *so, struct sockaddr **nam) 856{ 857 return (in_setsockaddr(so, nam, &ripcbinfo)); 858} 859 860/* 861 * This is the wrapper function for in_setpeeraddr. We just pass down 862 * the pcbinfo for in_setpeeraddr to lock. 863 */ 864static int 865rip_peeraddr(struct socket *so, struct sockaddr **nam) 866{ 867 return (in_setpeeraddr(so, nam, &ripcbinfo)); 868} 869 870 871SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0, 872 rip_pcblist, "S,xinpcb", "List of active raw IP sockets"); 873 874struct pr_usrreqs rip_usrreqs = { 875 rip_abort, pru_accept_notsupp, rip_attach, rip_bind, rip_connect, 876 pru_connect2_notsupp, in_control, rip_detach, rip_disconnect, 877 pru_listen_notsupp, rip_peeraddr, pru_rcvd_notsupp, 878 pru_rcvoob_notsupp, rip_send, pru_sense_null, rip_shutdown, 879 rip_sockaddr, sosend, soreceive, sopoll, in_pcbsosetlabel 880};
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