1 /* 2 * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved. 3 * Copyright (c) 2004 The DragonFly Project. All rights reserved. 4 * 5 * This code is derived from software contributed to The DragonFly Project 6 * by Jeffrey M. Hsu. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of The DragonFly Project nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific, prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 67 * $FreeBSD: src/sys/netinet/udp_usrreq.c,v 1.64.2.18 2003/01/24 05:11:34 sam Exp $ 68 * $DragonFly: src/sys/netinet/udp_usrreq.c,v 1.47 2008/11/11 10:46:58 sephe Exp $ 69 */ 70 71 #include "opt_ipsec.h" 72 #include "opt_inet6.h" 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/malloc.h> 78 #include <sys/mbuf.h> 79 #include <sys/domain.h> 80 #include <sys/proc.h> 81 #include <sys/priv.h> 82 #include <sys/protosw.h> 83 #include <sys/socket.h> 84 #include <sys/socketvar.h> 85 #include <sys/sysctl.h> 86 #include <sys/syslog.h> 87 #include <sys/in_cksum.h> 88 89 #include <sys/thread2.h> 90 #include <sys/socketvar2.h> 91 #include <sys/serialize.h> 92 93 #include <machine/stdarg.h> 94 95 #include <net/if.h> 96 #include <net/route.h> 97 #include <net/netmsg2.h> 98 99 #include <netinet/in.h> 100 #include <netinet/in_systm.h> 101 #include <netinet/ip.h> 102 #ifdef INET6 103 #include <netinet/ip6.h> 104 #endif 105 #include <netinet/in_pcb.h> 106 #include <netinet/in_var.h> 107 #include <netinet/ip_var.h> 108 #ifdef INET6 109 #include <netinet6/ip6_var.h> 110 #endif 111 #include <netinet/ip_icmp.h> 112 #include <netinet/icmp_var.h> 113 #include <netinet/udp.h> 114 #include <netinet/udp_var.h> 115 116 #ifdef FAST_IPSEC 117 #include <netproto/ipsec/ipsec.h> 118 #endif 119 120 #ifdef IPSEC 121 #include <netinet6/ipsec.h> 122 #endif 123 124 /* 125 * UDP protocol implementation. 126 * Per RFC 768, August, 1980. 127 */ 128 #ifndef COMPAT_42 129 static int udpcksum = 1; 130 #else 131 static int udpcksum = 0; /* XXX */ 132 #endif 133 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, 134 &udpcksum, 0, "Enable checksumming of UDP packets"); 135 136 int log_in_vain = 0; 137 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW, 138 &log_in_vain, 0, "Log all incoming UDP packets"); 139 140 static int blackhole = 0; 141 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW, 142 &blackhole, 0, "Do not send port unreachables for refused connects"); 143 144 static int strict_mcast_mship = 1; 145 SYSCTL_INT(_net_inet_udp, OID_AUTO, strict_mcast_mship, CTLFLAG_RW, 146 &strict_mcast_mship, 0, "Only send multicast to member sockets"); 147 148 int udp_sosnd_async = 1; 149 SYSCTL_INT(_net_inet_udp, OID_AUTO, sosnd_async, CTLFLAG_RW, 150 &udp_sosnd_async, 0, "UDP asynchronized pru_send"); 151 152 struct inpcbinfo udbinfo; 153 154 static struct netisr_barrier *udbinfo_br; 155 static struct lwkt_serialize udbinfo_slize = LWKT_SERIALIZE_INITIALIZER; 156 157 #ifndef UDBHASHSIZE 158 #define UDBHASHSIZE 16 159 #endif 160 161 struct udpstat udpstat; /* from udp_var.h */ 162 SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RW, 163 &udpstat, udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)"); 164 165 static struct sockaddr_in udp_in = { sizeof udp_in, AF_INET }; 166 #ifdef INET6 167 struct udp_in6 { 168 struct sockaddr_in6 uin6_sin; 169 u_char uin6_init_done : 1; 170 } udp_in6 = { 171 { sizeof udp_in6.uin6_sin, AF_INET6 }, 172 0 173 }; 174 struct udp_ip6 { 175 struct ip6_hdr uip6_ip6; 176 u_char uip6_init_done : 1; 177 } udp_ip6; 178 #endif /* INET6 */ 179 180 static void udp_append (struct inpcb *last, struct ip *ip, 181 struct mbuf *n, int off); 182 #ifdef INET6 183 static void ip_2_ip6_hdr (struct ip6_hdr *ip6, struct ip *ip); 184 #endif 185 186 static int udp_connect_oncpu(struct socket *so, struct thread *td, 187 struct sockaddr_in *sin, struct sockaddr_in *if_sin); 188 static int udp_output (struct inpcb *, struct mbuf *, struct sockaddr *, 189 struct thread *, int); 190 191 void 192 udp_init(void) 193 { 194 in_pcbinfo_init(&udbinfo); 195 udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask); 196 udbinfo.porthashbase = hashinit(UDBHASHSIZE, M_PCB, 197 &udbinfo.porthashmask); 198 udbinfo.wildcardhashbase = hashinit(UDBHASHSIZE, M_PCB, 199 &udbinfo.wildcardhashmask); 200 udbinfo.ipi_size = sizeof(struct inpcb); 201 202 udbinfo_br = netisr_barrier_create(); 203 } 204 205 /* 206 * Check multicast packets to make sure they are only sent to sockets with 207 * multicast memberships for the packet's destination address and arrival 208 * interface. Multicast packets to multicast-unaware sockets are also 209 * disallowed. 210 * 211 * Returns 0 if the packet is acceptable, -1 if it is not. 212 */ 213 static __inline int 214 check_multicast_membership(struct ip *ip, struct inpcb *inp, struct mbuf *m) 215 { 216 int mshipno; 217 struct ip_moptions *mopt; 218 219 if (strict_mcast_mship == 0 || 220 !IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { 221 return (0); 222 } 223 mopt = inp->inp_moptions; 224 if (mopt == NULL) 225 return (-1); 226 for (mshipno = 0; mshipno < mopt->imo_num_memberships; ++mshipno) { 227 struct in_multi *maddr = mopt->imo_membership[mshipno]; 228 229 if (ip->ip_dst.s_addr == maddr->inm_addr.s_addr && 230 m->m_pkthdr.rcvif == maddr->inm_ifp) { 231 return (0); 232 } 233 } 234 return (-1); 235 } 236 237 int 238 udp_input(struct mbuf **mp, int *offp, int proto) 239 { 240 int iphlen; 241 struct ip *ip; 242 struct udphdr *uh; 243 struct inpcb *inp; 244 struct mbuf *m; 245 struct mbuf *opts = NULL; 246 int len, off; 247 struct ip save_ip; 248 struct sockaddr *append_sa; 249 250 off = *offp; 251 m = *mp; 252 *mp = NULL; 253 254 iphlen = off; 255 udpstat.udps_ipackets++; 256 257 /* 258 * Strip IP options, if any; should skip this, 259 * make available to user, and use on returned packets, 260 * but we don't yet have a way to check the checksum 261 * with options still present. 262 */ 263 if (iphlen > sizeof(struct ip)) { 264 ip_stripoptions(m); 265 iphlen = sizeof(struct ip); 266 } 267 268 /* 269 * IP and UDP headers are together in first mbuf. 270 * Already checked and pulled up in ip_demux(). 271 */ 272 KASSERT(m->m_len >= iphlen + sizeof(struct udphdr), 273 ("UDP header not in one mbuf")); 274 275 ip = mtod(m, struct ip *); 276 uh = (struct udphdr *)((caddr_t)ip + iphlen); 277 278 /* destination port of 0 is illegal, based on RFC768. */ 279 if (uh->uh_dport == 0) 280 goto bad; 281 282 /* 283 * Make mbuf data length reflect UDP length. 284 * If not enough data to reflect UDP length, drop. 285 */ 286 len = ntohs((u_short)uh->uh_ulen); 287 if (ip->ip_len != len) { 288 if (len > ip->ip_len || len < sizeof(struct udphdr)) { 289 udpstat.udps_badlen++; 290 goto bad; 291 } 292 m_adj(m, len - ip->ip_len); 293 /* ip->ip_len = len; */ 294 } 295 /* 296 * Save a copy of the IP header in case we want restore it 297 * for sending an ICMP error message in response. 298 */ 299 save_ip = *ip; 300 301 /* 302 * Checksum extended UDP header and data. 303 */ 304 if (uh->uh_sum) { 305 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 306 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 307 uh->uh_sum = m->m_pkthdr.csum_data; 308 else 309 uh->uh_sum = in_pseudo(ip->ip_src.s_addr, 310 ip->ip_dst.s_addr, htonl((u_short)len + 311 m->m_pkthdr.csum_data + IPPROTO_UDP)); 312 uh->uh_sum ^= 0xffff; 313 } else { 314 char b[9]; 315 316 bcopy(((struct ipovly *)ip)->ih_x1, b, 9); 317 bzero(((struct ipovly *)ip)->ih_x1, 9); 318 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 319 uh->uh_sum = in_cksum(m, len + sizeof(struct ip)); 320 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9); 321 } 322 if (uh->uh_sum) { 323 udpstat.udps_badsum++; 324 m_freem(m); 325 return(IPPROTO_DONE); 326 } 327 } else 328 udpstat.udps_nosum++; 329 330 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || 331 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 332 struct inpcb *last; 333 334 /* 335 * Deliver a multicast or broadcast datagram to *all* sockets 336 * for which the local and remote addresses and ports match 337 * those of the incoming datagram. This allows more than 338 * one process to receive multi/broadcasts on the same port. 339 * (This really ought to be done for unicast datagrams as 340 * well, but that would cause problems with existing 341 * applications that open both address-specific sockets and 342 * a wildcard socket listening to the same port -- they would 343 * end up receiving duplicates of every unicast datagram. 344 * Those applications open the multiple sockets to overcome an 345 * inadequacy of the UDP socket interface, but for backwards 346 * compatibility we avoid the problem here rather than 347 * fixing the interface. Maybe 4.5BSD will remedy this?) 348 */ 349 350 /* 351 * Construct sockaddr format source address. 352 */ 353 udp_in.sin_port = uh->uh_sport; 354 udp_in.sin_addr = ip->ip_src; 355 /* 356 * Locate pcb(s) for datagram. 357 * (Algorithm copied from raw_intr().) 358 */ 359 last = NULL; 360 #ifdef INET6 361 udp_in6.uin6_init_done = udp_ip6.uip6_init_done = 0; 362 #endif 363 LIST_FOREACH(inp, &udbinfo.pcblisthead, inp_list) { 364 KKASSERT((inp->inp_flags & INP_PLACEMARKER) == 0); 365 #ifdef INET6 366 if (!(inp->inp_vflag & INP_IPV4)) 367 continue; 368 #endif 369 if (inp->inp_lport != uh->uh_dport) 370 continue; 371 if (inp->inp_laddr.s_addr != INADDR_ANY) { 372 if (inp->inp_laddr.s_addr != 373 ip->ip_dst.s_addr) 374 continue; 375 } 376 if (inp->inp_faddr.s_addr != INADDR_ANY) { 377 if (inp->inp_faddr.s_addr != 378 ip->ip_src.s_addr || 379 inp->inp_fport != uh->uh_sport) 380 continue; 381 } 382 383 if (check_multicast_membership(ip, inp, m) < 0) 384 continue; 385 386 if (last != NULL) { 387 struct mbuf *n; 388 389 #ifdef IPSEC 390 /* check AH/ESP integrity. */ 391 if (ipsec4_in_reject_so(m, last->inp_socket)) 392 ipsecstat.in_polvio++; 393 /* do not inject data to pcb */ 394 else 395 #endif /*IPSEC*/ 396 #ifdef FAST_IPSEC 397 /* check AH/ESP integrity. */ 398 if (ipsec4_in_reject(m, last)) 399 ; 400 else 401 #endif /*FAST_IPSEC*/ 402 if ((n = m_copypacket(m, MB_DONTWAIT)) != NULL) 403 udp_append(last, ip, n, 404 iphlen + 405 sizeof(struct udphdr)); 406 } 407 last = inp; 408 /* 409 * Don't look for additional matches if this one does 410 * not have either the SO_REUSEPORT or SO_REUSEADDR 411 * socket options set. This heuristic avoids searching 412 * through all pcbs in the common case of a non-shared 413 * port. It * assumes that an application will never 414 * clear these options after setting them. 415 */ 416 if (!(last->inp_socket->so_options & 417 (SO_REUSEPORT | SO_REUSEADDR))) 418 break; 419 } 420 421 if (last == NULL) { 422 /* 423 * No matching pcb found; discard datagram. 424 * (No need to send an ICMP Port Unreachable 425 * for a broadcast or multicast datgram.) 426 */ 427 udpstat.udps_noportbcast++; 428 goto bad; 429 } 430 #ifdef IPSEC 431 /* check AH/ESP integrity. */ 432 if (ipsec4_in_reject_so(m, last->inp_socket)) { 433 ipsecstat.in_polvio++; 434 goto bad; 435 } 436 #endif /*IPSEC*/ 437 #ifdef FAST_IPSEC 438 /* check AH/ESP integrity. */ 439 if (ipsec4_in_reject(m, last)) 440 goto bad; 441 #endif /*FAST_IPSEC*/ 442 udp_append(last, ip, m, iphlen + sizeof(struct udphdr)); 443 return(IPPROTO_DONE); 444 } 445 /* 446 * Locate pcb for datagram. 447 */ 448 inp = in_pcblookup_hash(&udbinfo, ip->ip_src, uh->uh_sport, 449 ip->ip_dst, uh->uh_dport, 1, m->m_pkthdr.rcvif); 450 if (inp == NULL) { 451 if (log_in_vain) { 452 char buf[sizeof "aaa.bbb.ccc.ddd"]; 453 454 strcpy(buf, inet_ntoa(ip->ip_dst)); 455 log(LOG_INFO, 456 "Connection attempt to UDP %s:%d from %s:%d\n", 457 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src), 458 ntohs(uh->uh_sport)); 459 } 460 udpstat.udps_noport++; 461 if (m->m_flags & (M_BCAST | M_MCAST)) { 462 udpstat.udps_noportbcast++; 463 goto bad; 464 } 465 if (blackhole) 466 goto bad; 467 #ifdef ICMP_BANDLIM 468 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0) 469 goto bad; 470 #endif 471 *ip = save_ip; 472 ip->ip_len += iphlen; 473 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 474 return(IPPROTO_DONE); 475 } 476 #ifdef IPSEC 477 if (ipsec4_in_reject_so(m, inp->inp_socket)) { 478 ipsecstat.in_polvio++; 479 goto bad; 480 } 481 #endif /*IPSEC*/ 482 #ifdef FAST_IPSEC 483 if (ipsec4_in_reject(m, inp)) 484 goto bad; 485 #endif /*FAST_IPSEC*/ 486 /* 487 * Check the minimum TTL for socket. 488 */ 489 if (ip->ip_ttl < inp->inp_ip_minttl) 490 goto bad; 491 492 /* 493 * Construct sockaddr format source address. 494 * Stuff source address and datagram in user buffer. 495 */ 496 udp_in.sin_port = uh->uh_sport; 497 udp_in.sin_addr = ip->ip_src; 498 if ((inp->inp_flags & INP_CONTROLOPTS) || 499 (inp->inp_socket->so_options & SO_TIMESTAMP)) { 500 #ifdef INET6 501 if (inp->inp_vflag & INP_IPV6) { 502 int savedflags; 503 504 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip); 505 savedflags = inp->inp_flags; 506 inp->inp_flags &= ~INP_UNMAPPABLEOPTS; 507 ip6_savecontrol(inp, &opts, &udp_ip6.uip6_ip6, m); 508 inp->inp_flags = savedflags; 509 } else 510 #endif 511 ip_savecontrol(inp, &opts, ip, m); 512 } 513 m_adj(m, iphlen + sizeof(struct udphdr)); 514 #ifdef INET6 515 if (inp->inp_vflag & INP_IPV6) { 516 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin); 517 append_sa = (struct sockaddr *)&udp_in6; 518 } else 519 #endif 520 append_sa = (struct sockaddr *)&udp_in; 521 522 lwkt_gettoken(&inp->inp_socket->so_rcv.ssb_token); 523 if (ssb_appendaddr(&inp->inp_socket->so_rcv, append_sa, m, opts) == 0) { 524 udpstat.udps_fullsock++; 525 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token); 526 goto bad; 527 } 528 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token); 529 sorwakeup(inp->inp_socket); 530 return(IPPROTO_DONE); 531 bad: 532 m_freem(m); 533 if (opts) 534 m_freem(opts); 535 return(IPPROTO_DONE); 536 } 537 538 #ifdef INET6 539 static void 540 ip_2_ip6_hdr(struct ip6_hdr *ip6, struct ip *ip) 541 { 542 bzero(ip6, sizeof *ip6); 543 544 ip6->ip6_vfc = IPV6_VERSION; 545 ip6->ip6_plen = ip->ip_len; 546 ip6->ip6_nxt = ip->ip_p; 547 ip6->ip6_hlim = ip->ip_ttl; 548 ip6->ip6_src.s6_addr32[2] = ip6->ip6_dst.s6_addr32[2] = 549 IPV6_ADDR_INT32_SMP; 550 ip6->ip6_src.s6_addr32[3] = ip->ip_src.s_addr; 551 ip6->ip6_dst.s6_addr32[3] = ip->ip_dst.s_addr; 552 } 553 #endif 554 555 /* 556 * subroutine of udp_input(), mainly for source code readability. 557 * caller must properly init udp_ip6 and udp_in6 beforehand. 558 */ 559 static void 560 udp_append(struct inpcb *last, struct ip *ip, struct mbuf *n, int off) 561 { 562 struct sockaddr *append_sa; 563 struct mbuf *opts = NULL; 564 565 if (last->inp_flags & INP_CONTROLOPTS || 566 last->inp_socket->so_options & SO_TIMESTAMP) { 567 #ifdef INET6 568 if (last->inp_vflag & INP_IPV6) { 569 int savedflags; 570 571 if (udp_ip6.uip6_init_done == 0) { 572 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip); 573 udp_ip6.uip6_init_done = 1; 574 } 575 savedflags = last->inp_flags; 576 last->inp_flags &= ~INP_UNMAPPABLEOPTS; 577 ip6_savecontrol(last, &opts, &udp_ip6.uip6_ip6, n); 578 last->inp_flags = savedflags; 579 } else 580 #endif 581 ip_savecontrol(last, &opts, ip, n); 582 } 583 #ifdef INET6 584 if (last->inp_vflag & INP_IPV6) { 585 if (udp_in6.uin6_init_done == 0) { 586 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin); 587 udp_in6.uin6_init_done = 1; 588 } 589 append_sa = (struct sockaddr *)&udp_in6.uin6_sin; 590 } else 591 #endif 592 append_sa = (struct sockaddr *)&udp_in; 593 m_adj(n, off); 594 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token); 595 if (ssb_appendaddr(&last->inp_socket->so_rcv, append_sa, n, opts) == 0) { 596 m_freem(n); 597 if (opts) 598 m_freem(opts); 599 udpstat.udps_fullsock++; 600 } else { 601 sorwakeup(last->inp_socket); 602 } 603 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token); 604 } 605 606 /* 607 * Notify a udp user of an asynchronous error; 608 * just wake up so that he can collect error status. 609 */ 610 void 611 udp_notify(struct inpcb *inp, int error) 612 { 613 inp->inp_socket->so_error = error; 614 sorwakeup(inp->inp_socket); 615 sowwakeup(inp->inp_socket); 616 } 617 618 struct netmsg_udp_notify { 619 struct netmsg_base base; 620 void (*nm_notify)(struct inpcb *, int); 621 struct in_addr nm_faddr; 622 int nm_arg; 623 }; 624 625 static void 626 udp_notifyall_oncpu(netmsg_t msg) 627 { 628 struct netmsg_udp_notify *nm = (struct netmsg_udp_notify *)msg; 629 #if 0 630 int nextcpu; 631 #endif 632 633 in_pcbnotifyall(&udbinfo.pcblisthead, nm->nm_faddr, 634 nm->nm_arg, nm->nm_notify); 635 lwkt_replymsg(&nm->base.lmsg, 0); 636 637 #if 0 638 /* XXX currently udp only runs on cpu 0 */ 639 nextcpu = mycpuid + 1; 640 if (nextcpu < ncpus2) 641 lwkt_forwardmsg(cpu_portfn(nextcpu), &nm->base.lmsg); 642 else 643 lwkt_replymsg(&nmsg->base.lmsg, 0); 644 #endif 645 } 646 647 static void 648 udp_rtchange(struct inpcb *inp, int err) 649 { 650 #ifdef SMP 651 /* XXX Nuke this, once UDP inpcbs are CPU localized */ 652 if (inp->inp_route.ro_rt && inp->inp_route.ro_rt->rt_cpuid == mycpuid) { 653 rtfree(inp->inp_route.ro_rt); 654 inp->inp_route.ro_rt = NULL; 655 /* 656 * A new route can be allocated the next time 657 * output is attempted. 658 */ 659 } 660 #else 661 in_rtchange(inp, err); 662 #endif 663 } 664 665 void 666 udp_ctlinput(netmsg_t msg) 667 { 668 struct sockaddr *sa = msg->ctlinput.nm_arg; 669 struct ip *ip = msg->ctlinput.nm_extra; 670 int cmd = msg->ctlinput.nm_cmd; 671 struct udphdr *uh; 672 void (*notify) (struct inpcb *, int) = udp_notify; 673 struct in_addr faddr; 674 struct inpcb *inp; 675 676 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 677 678 faddr = ((struct sockaddr_in *)sa)->sin_addr; 679 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY) 680 goto done; 681 682 if (PRC_IS_REDIRECT(cmd)) { 683 ip = NULL; 684 notify = udp_rtchange; 685 } else if (cmd == PRC_HOSTDEAD) { 686 ip = NULL; 687 } else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) { 688 goto done; 689 } 690 691 if (ip) { 692 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 693 inp = in_pcblookup_hash(&udbinfo, faddr, uh->uh_dport, 694 ip->ip_src, uh->uh_sport, 0, NULL); 695 if (inp != NULL && inp->inp_socket != NULL) 696 (*notify)(inp, inetctlerrmap[cmd]); 697 } else if (PRC_IS_REDIRECT(cmd)) { 698 struct netmsg_udp_notify *nm; 699 700 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 701 nm = kmalloc(sizeof(*nm), M_LWKTMSG, M_INTWAIT); 702 netmsg_init(&nm->base, NULL, &netisr_afree_rport, 703 0, udp_notifyall_oncpu); 704 nm->nm_faddr = faddr; 705 nm->nm_arg = inetctlerrmap[cmd]; 706 nm->nm_notify = notify; 707 lwkt_sendmsg(cpu_portfn(0), &nm->base.lmsg); 708 } else { 709 /* 710 * XXX We should forward msg upon PRC_HOSTHEAD and ip == NULL, 711 * once UDP inpcbs are CPU localized 712 */ 713 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 714 in_pcbnotifyall(&udbinfo.pcblisthead, faddr, inetctlerrmap[cmd], 715 notify); 716 } 717 done: 718 lwkt_replymsg(&msg->lmsg, 0); 719 } 720 721 static int 722 udp_pcblist(SYSCTL_HANDLER_ARGS) 723 { 724 struct xinpcb *xi; 725 int error, nxi, i; 726 727 udbinfo_lock(); 728 error = in_pcblist_global_nomarker(oidp, arg1, arg2, req, &xi, &nxi); 729 udbinfo_unlock(); 730 731 if (error) { 732 KKASSERT(xi == NULL); 733 return error; 734 } 735 if (nxi == 0) { 736 KKASSERT(xi == NULL); 737 return 0; 738 } 739 740 for (i = 0; i < nxi; ++i) { 741 error = SYSCTL_OUT(req, &xi[i], sizeof(xi[i])); 742 if (error) 743 break; 744 } 745 kfree(xi, M_TEMP); 746 747 return error; 748 } 749 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, &udbinfo, 0, 750 udp_pcblist, "S,xinpcb", "List of active UDP sockets"); 751 752 static int 753 udp_getcred(SYSCTL_HANDLER_ARGS) 754 { 755 struct sockaddr_in addrs[2]; 756 struct ucred cred0, *cred = NULL; 757 struct inpcb *inp; 758 int error; 759 760 error = priv_check(req->td, PRIV_ROOT); 761 if (error) 762 return (error); 763 error = SYSCTL_IN(req, addrs, sizeof addrs); 764 if (error) 765 return (error); 766 767 udbinfo_lock(); 768 inp = in_pcblookup_hash(&udbinfo, addrs[1].sin_addr, addrs[1].sin_port, 769 addrs[0].sin_addr, addrs[0].sin_port, 1, NULL); 770 if (inp == NULL || inp->inp_socket == NULL) { 771 error = ENOENT; 772 } else { 773 if (inp->inp_socket->so_cred != NULL) { 774 cred0 = *(inp->inp_socket->so_cred); 775 cred = &cred0; 776 } 777 } 778 udbinfo_unlock(); 779 780 if (error) 781 return error; 782 783 return SYSCTL_OUT(req, cred, sizeof(struct ucred)); 784 } 785 786 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 787 0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection"); 788 789 static int 790 udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *dstaddr, 791 struct thread *td, int flags) 792 { 793 struct udpiphdr *ui; 794 int len = m->m_pkthdr.len; 795 struct sockaddr_in *sin; /* really is initialized before use */ 796 int error = 0, lport_any = 0; 797 798 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { 799 error = EMSGSIZE; 800 goto release; 801 } 802 803 if (inp->inp_lport == 0) { /* unbound socket */ 804 error = in_pcbbind(inp, NULL, td); 805 if (error) 806 goto release; 807 808 udbinfo_barrier_set(); 809 in_pcbinswildcardhash(inp); 810 udbinfo_barrier_rem(); 811 lport_any = 1; 812 } 813 814 if (dstaddr != NULL) { /* destination address specified */ 815 if (inp->inp_faddr.s_addr != INADDR_ANY) { 816 /* already connected */ 817 error = EISCONN; 818 goto release; 819 } 820 sin = (struct sockaddr_in *)dstaddr; 821 if (!prison_remote_ip(td, (struct sockaddr *)&sin)) { 822 error = EAFNOSUPPORT; /* IPv6 only jail */ 823 goto release; 824 } 825 } else { 826 if (inp->inp_faddr.s_addr == INADDR_ANY) { 827 /* no destination specified and not already connected */ 828 error = ENOTCONN; 829 goto release; 830 } 831 sin = NULL; 832 } 833 834 /* 835 * Calculate data length and get a mbuf 836 * for UDP and IP headers. 837 */ 838 M_PREPEND(m, sizeof(struct udpiphdr), MB_DONTWAIT); 839 if (m == NULL) { 840 error = ENOBUFS; 841 goto release; 842 } 843 844 /* 845 * Fill in mbuf with extended UDP header 846 * and addresses and length put into network format. 847 */ 848 ui = mtod(m, struct udpiphdr *); 849 bzero(ui->ui_x1, sizeof ui->ui_x1); /* XXX still needed? */ 850 ui->ui_pr = IPPROTO_UDP; 851 852 /* 853 * Set destination address. 854 */ 855 if (dstaddr != NULL) { /* use specified destination */ 856 ui->ui_dst = sin->sin_addr; 857 ui->ui_dport = sin->sin_port; 858 } else { /* use connected destination */ 859 ui->ui_dst = inp->inp_faddr; 860 ui->ui_dport = inp->inp_fport; 861 } 862 863 /* 864 * Set source address. 865 */ 866 if (inp->inp_laddr.s_addr == INADDR_ANY) { 867 struct sockaddr_in *if_sin; 868 869 if (dstaddr == NULL) { 870 /* 871 * connect() had (or should have) failed because 872 * the interface had no IP address, but the 873 * application proceeded to call send() anyways. 874 */ 875 error = ENOTCONN; 876 goto release; 877 } 878 879 /* Look up outgoing interface. */ 880 if ((error = in_pcbladdr(inp, dstaddr, &if_sin, td))) 881 goto release; 882 ui->ui_src = if_sin->sin_addr; /* use address of interface */ 883 } else { 884 ui->ui_src = inp->inp_laddr; /* use non-null bound address */ 885 } 886 ui->ui_sport = inp->inp_lport; 887 KASSERT(inp->inp_lport != 0, ("inp lport should have been bound")); 888 889 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr)); 890 891 /* 892 * Set up checksum and output datagram. 893 */ 894 if (udpcksum) { 895 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr, 896 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP)); 897 m->m_pkthdr.csum_flags = CSUM_UDP; 898 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 899 } else { 900 ui->ui_sum = 0; 901 } 902 ((struct ip *)ui)->ip_len = sizeof(struct udpiphdr) + len; 903 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */ 904 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */ 905 udpstat.udps_opackets++; 906 907 error = ip_output(m, inp->inp_options, &inp->inp_route, 908 (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)) | 909 flags | IP_DEBUGROUTE, 910 inp->inp_moptions, inp); 911 912 /* 913 * If this is the first data gram sent on an unbound and unconnected 914 * UDP socket, lport will be changed in this function. If target 915 * CPU after this lport changing is no longer the current CPU, then 916 * free the route entry allocated on the current CPU. 917 */ 918 if (lport_any) { 919 if (udp_addrcpu(inp->inp_faddr.s_addr, inp->inp_fport, 920 inp->inp_laddr.s_addr, inp->inp_lport) != mycpuid) { 921 #ifdef notyet 922 struct route *ro = &inp->inp_route; 923 924 if (ro->ro_rt != NULL) 925 RTFREE(ro->ro_rt); 926 bzero(ro, sizeof(*ro)); 927 #else 928 panic("UDP activity should only be in netisr0"); 929 #endif 930 } 931 } 932 return (error); 933 934 release: 935 m_freem(m); 936 return (error); 937 } 938 939 u_long udp_sendspace = 9216; /* really max datagram size */ 940 /* 40 1K datagrams */ 941 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW, 942 &udp_sendspace, 0, "Maximum outgoing UDP datagram size"); 943 944 u_long udp_recvspace = 40 * (1024 + 945 #ifdef INET6 946 sizeof(struct sockaddr_in6) 947 #else 948 sizeof(struct sockaddr_in) 949 #endif 950 ); 951 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW, 952 &udp_recvspace, 0, "Maximum incoming UDP datagram size"); 953 954 /* 955 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 956 * will sofree() it when we return. 957 */ 958 static void 959 udp_abort(netmsg_t msg) 960 { 961 struct socket *so = msg->abort.base.nm_so; 962 struct inpcb *inp; 963 int error; 964 965 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 966 967 inp = so->so_pcb; 968 if (inp) { 969 soisdisconnected(so); 970 971 udbinfo_barrier_set(); 972 in_pcbdetach(inp); 973 udbinfo_barrier_rem(); 974 error = 0; 975 } else { 976 error = EINVAL; 977 } 978 lwkt_replymsg(&msg->abort.base.lmsg, error); 979 } 980 981 static void 982 udp_attach(netmsg_t msg) 983 { 984 struct socket *so = msg->attach.base.nm_so; 985 struct pru_attach_info *ai = msg->attach.nm_ai; 986 struct inpcb *inp; 987 int error; 988 989 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 990 991 inp = so->so_pcb; 992 if (inp != NULL) { 993 error = EINVAL; 994 goto out; 995 } 996 error = soreserve(so, udp_sendspace, udp_recvspace, ai->sb_rlimit); 997 if (error) 998 goto out; 999 1000 udbinfo_barrier_set(); 1001 error = in_pcballoc(so, &udbinfo); 1002 udbinfo_barrier_rem(); 1003 1004 if (error) 1005 goto out; 1006 1007 /* 1008 * Set default port for protocol processing prior to bind/connect. 1009 */ 1010 sosetport(so, cpu_portfn(0)); 1011 1012 inp = (struct inpcb *)so->so_pcb; 1013 inp->inp_vflag |= INP_IPV4; 1014 inp->inp_ip_ttl = ip_defttl; 1015 error = 0; 1016 out: 1017 lwkt_replymsg(&msg->attach.base.lmsg, error); 1018 } 1019 1020 static void 1021 udp_bind(netmsg_t msg) 1022 { 1023 struct socket *so = msg->bind.base.nm_so; 1024 struct sockaddr *nam = msg->bind.nm_nam; 1025 struct thread *td = msg->bind.nm_td; 1026 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 1027 struct inpcb *inp; 1028 int error; 1029 1030 inp = so->so_pcb; 1031 if (inp) { 1032 error = in_pcbbind(inp, nam, td); 1033 if (error == 0) { 1034 if (sin->sin_addr.s_addr != INADDR_ANY) 1035 inp->inp_flags |= INP_WASBOUND_NOTANY; 1036 1037 udbinfo_barrier_set(); 1038 in_pcbinswildcardhash(inp); 1039 udbinfo_barrier_rem(); 1040 } 1041 } else { 1042 error = EINVAL; 1043 } 1044 lwkt_replymsg(&msg->bind.base.lmsg, error); 1045 } 1046 1047 static void 1048 udp_connect(netmsg_t msg) 1049 { 1050 struct socket *so = msg->connect.base.nm_so; 1051 struct sockaddr *nam = msg->connect.nm_nam; 1052 struct thread *td = msg->connect.nm_td; 1053 struct inpcb *inp; 1054 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 1055 struct sockaddr_in *if_sin; 1056 lwkt_port_t port; 1057 int error; 1058 1059 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 1060 1061 inp = so->so_pcb; 1062 if (inp == NULL) { 1063 error = EINVAL; 1064 goto out; 1065 } 1066 1067 if (msg->connect.nm_reconnect & NMSG_RECONNECT_RECONNECT) { 1068 panic("UDP does not support RECONNECT\n"); 1069 #ifdef notyet 1070 msg->connect.nm_reconnect &= ~NMSG_RECONNECT_RECONNECT; 1071 in_pcblink(inp, &udbinfo); 1072 #endif 1073 } 1074 1075 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1076 error = EISCONN; 1077 goto out; 1078 } 1079 error = 0; 1080 1081 /* 1082 * Bind if we have to 1083 */ 1084 if (td->td_proc && td->td_proc->p_ucred->cr_prison != NULL && 1085 inp->inp_laddr.s_addr == INADDR_ANY) { 1086 error = in_pcbbind(inp, NULL, td); 1087 if (error) 1088 goto out; 1089 } 1090 1091 /* 1092 * Calculate the correct protocol processing thread. The connect 1093 * operation must run there. 1094 */ 1095 error = in_pcbladdr(inp, nam, &if_sin, td); 1096 if (error) 1097 goto out; 1098 if (!prison_remote_ip(td, nam)) { 1099 error = EAFNOSUPPORT; /* IPv6 only jail */ 1100 goto out; 1101 } 1102 1103 port = udp_addrport(sin->sin_addr.s_addr, sin->sin_port, 1104 inp->inp_laddr.s_addr, inp->inp_lport); 1105 #ifdef SMP 1106 if (port != &curthread->td_msgport) { 1107 #ifdef notyet 1108 struct route *ro = &inp->inp_route; 1109 1110 /* 1111 * in_pcbladdr() may have allocated a route entry for us 1112 * on the current CPU, but we need a route entry on the 1113 * inpcb's owner CPU, so free it here. 1114 */ 1115 if (ro->ro_rt != NULL) 1116 RTFREE(ro->ro_rt); 1117 bzero(ro, sizeof(*ro)); 1118 1119 /* 1120 * We are moving the protocol processing port the socket 1121 * is on, we have to unlink here and re-link on the 1122 * target cpu. 1123 */ 1124 in_pcbunlink(so->so_pcb, &udbinfo); 1125 /* in_pcbunlink(so->so_pcb, &udbinfo[mycpu->gd_cpuid]); */ 1126 sosetport(so, port); 1127 msg->connect.nm_reconnect |= NMSG_RECONNECT_RECONNECT; 1128 msg->connect.base.nm_dispatch = udp_connect; 1129 1130 lwkt_forwardmsg(port, &msg->connect.base.lmsg); 1131 /* msg invalid now */ 1132 return; 1133 #else 1134 panic("UDP activity should only be in netisr0"); 1135 #endif 1136 } 1137 #endif 1138 KKASSERT(port == &curthread->td_msgport); 1139 error = udp_connect_oncpu(so, td, sin, if_sin); 1140 out: 1141 KKASSERT(msg->connect.nm_m == NULL); 1142 lwkt_replymsg(&msg->connect.base.lmsg, error); 1143 } 1144 1145 static int 1146 udp_connect_oncpu(struct socket *so, struct thread *td, 1147 struct sockaddr_in *sin, struct sockaddr_in *if_sin) 1148 { 1149 struct inpcb *inp; 1150 int error; 1151 1152 udbinfo_barrier_set(); 1153 1154 inp = so->so_pcb; 1155 if (inp->inp_flags & INP_WILDCARD) 1156 in_pcbremwildcardhash(inp); 1157 error = in_pcbconnect(inp, (struct sockaddr *)sin, td); 1158 1159 if (error == 0) { 1160 /* 1161 * No more errors can occur, finish adjusting the socket 1162 * and change the processing port to reflect the connected 1163 * socket. Once set we can no longer safely mess with the 1164 * socket. 1165 */ 1166 soisconnected(so); 1167 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 1168 /* 1169 * Follow traditional BSD behavior and retain 1170 * the local port binding. But, fix the old misbehavior 1171 * of overwriting any previously bound local address. 1172 */ 1173 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 1174 inp->inp_laddr.s_addr = INADDR_ANY; 1175 in_pcbinswildcardhash(inp); 1176 } 1177 1178 udbinfo_barrier_rem(); 1179 return error; 1180 } 1181 1182 static void 1183 udp_detach(netmsg_t msg) 1184 { 1185 struct socket *so = msg->detach.base.nm_so; 1186 struct inpcb *inp; 1187 int error; 1188 1189 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 1190 1191 inp = so->so_pcb; 1192 if (inp) { 1193 udbinfo_barrier_set(); 1194 in_pcbdetach(inp); 1195 udbinfo_barrier_rem(); 1196 error = 0; 1197 } else { 1198 error = EINVAL; 1199 } 1200 lwkt_replymsg(&msg->detach.base.lmsg, error); 1201 } 1202 1203 static void 1204 udp_disconnect(netmsg_t msg) 1205 { 1206 struct socket *so = msg->disconnect.base.nm_so; 1207 struct route *ro; 1208 struct inpcb *inp; 1209 int error; 1210 1211 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 1212 1213 inp = so->so_pcb; 1214 if (inp == NULL) { 1215 error = EINVAL; 1216 goto out; 1217 } 1218 if (inp->inp_faddr.s_addr == INADDR_ANY) { 1219 error = ENOTCONN; 1220 goto out; 1221 } 1222 1223 soreference(so); 1224 1225 udbinfo_barrier_set(); 1226 in_pcbdisconnect(inp); 1227 udbinfo_barrier_rem(); 1228 1229 soclrstate(so, SS_ISCONNECTED); /* XXX */ 1230 sofree(so); 1231 1232 ro = &inp->inp_route; 1233 if (ro->ro_rt != NULL) 1234 RTFREE(ro->ro_rt); 1235 bzero(ro, sizeof(*ro)); 1236 error = 0; 1237 out: 1238 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 1239 } 1240 1241 static void 1242 udp_send(netmsg_t msg) 1243 { 1244 struct socket *so = msg->send.base.nm_so; 1245 struct mbuf *m = msg->send.nm_m; 1246 struct sockaddr *addr = msg->send.nm_addr; 1247 int pru_flags = msg->send.nm_flags; 1248 struct inpcb *inp; 1249 int error; 1250 1251 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 1252 KKASSERT(msg->send.nm_control == NULL); 1253 1254 inp = so->so_pcb; 1255 if (inp) { 1256 struct thread *td = msg->send.nm_td; 1257 int flags = 0; 1258 1259 if (pru_flags & PRUS_DONTROUTE) 1260 flags |= SO_DONTROUTE; 1261 error = udp_output(inp, m, addr, td, flags); 1262 } else { 1263 m_freem(m); 1264 error = EINVAL; 1265 } 1266 1267 if (pru_flags & PRUS_FREEADDR) 1268 kfree(addr, M_SONAME); 1269 1270 if ((pru_flags & PRUS_NOREPLY) == 0) 1271 lwkt_replymsg(&msg->send.base.lmsg, error); 1272 } 1273 1274 void 1275 udp_shutdown(netmsg_t msg) 1276 { 1277 struct socket *so = msg->shutdown.base.nm_so; 1278 struct inpcb *inp; 1279 int error; 1280 1281 KKASSERT(&curthread->td_msgport == cpu_portfn(0)); 1282 1283 inp = so->so_pcb; 1284 if (inp) { 1285 socantsendmore(so); 1286 error = 0; 1287 } else { 1288 error = EINVAL; 1289 } 1290 lwkt_replymsg(&msg->shutdown.base.lmsg, error); 1291 } 1292 1293 void 1294 udbinfo_lock(void) 1295 { 1296 lwkt_serialize_enter(&udbinfo_slize); 1297 } 1298 1299 void 1300 udbinfo_unlock(void) 1301 { 1302 lwkt_serialize_exit(&udbinfo_slize); 1303 } 1304 1305 void 1306 udbinfo_barrier_set(void) 1307 { 1308 netisr_barrier_set(udbinfo_br); 1309 udbinfo_lock(); 1310 } 1311 1312 void 1313 udbinfo_barrier_rem(void) 1314 { 1315 udbinfo_unlock(); 1316 netisr_barrier_rem(udbinfo_br); 1317 } 1318 1319 struct pr_usrreqs udp_usrreqs = { 1320 .pru_abort = udp_abort, 1321 .pru_accept = pr_generic_notsupp, 1322 .pru_attach = udp_attach, 1323 .pru_bind = udp_bind, 1324 .pru_connect = udp_connect, 1325 .pru_connect2 = pr_generic_notsupp, 1326 .pru_control = in_control_dispatch, 1327 .pru_detach = udp_detach, 1328 .pru_disconnect = udp_disconnect, 1329 .pru_listen = pr_generic_notsupp, 1330 .pru_peeraddr = in_setpeeraddr_dispatch, 1331 .pru_rcvd = pr_generic_notsupp, 1332 .pru_rcvoob = pr_generic_notsupp, 1333 .pru_send = udp_send, 1334 .pru_sense = pru_sense_null, 1335 .pru_shutdown = udp_shutdown, 1336 .pru_sockaddr = in_setsockaddr_dispatch, 1337 .pru_sosend = sosendudp, 1338 .pru_soreceive = soreceive 1339 }; 1340 1341