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. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 63 * $FreeBSD: src/sys/netinet/udp_usrreq.c,v 1.64.2.18 2003/01/24 05:11:34 sam Exp $ 64 */ 65 66 #include "opt_inet6.h" 67 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/kernel.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/domain.h> 74 #include <sys/proc.h> 75 #include <sys/priv.h> 76 #include <sys/protosw.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/sysctl.h> 80 #include <sys/syslog.h> 81 #include <sys/in_cksum.h> 82 #include <sys/ktr.h> 83 #include <sys/jail.h> 84 85 #include <sys/socketvar2.h> 86 #include <sys/serialize.h> 87 88 #include <machine/stdarg.h> 89 90 #include <net/if.h> 91 #include <net/route.h> 92 #include <net/netmsg2.h> 93 #include <net/netisr2.h> 94 95 #include <netinet/in.h> 96 #include <netinet/in_systm.h> 97 #include <netinet/ip.h> 98 #ifdef INET6 99 #include <netinet/ip6.h> 100 #endif 101 #include <netinet/in_pcb.h> 102 #include <netinet/in_var.h> 103 #include <netinet/ip_var.h> 104 #ifdef INET6 105 #include <netinet6/ip6_var.h> 106 #endif 107 #include <netinet/ip_icmp.h> 108 #include <netinet/icmp_var.h> 109 #include <netinet/udp.h> 110 #include <netinet/udp_var.h> 111 112 #define MSGF_UDP_SEND MSGF_PROTO1 113 114 #define INP_DIRECT_DETACH INP_FLAG_PROTO2 115 116 #define UDP_KTR_STRING "inp=%p" 117 #define UDP_KTR_ARGS struct inpcb *inp 118 119 #ifndef KTR_UDP 120 #define KTR_UDP KTR_ALL 121 #endif 122 123 KTR_INFO_MASTER(udp); 124 KTR_INFO(KTR_UDP, udp, send_beg, 0, UDP_KTR_STRING, UDP_KTR_ARGS); 125 KTR_INFO(KTR_UDP, udp, send_end, 1, UDP_KTR_STRING, UDP_KTR_ARGS); 126 KTR_INFO(KTR_UDP, udp, send_ipout, 2, UDP_KTR_STRING, UDP_KTR_ARGS); 127 KTR_INFO(KTR_UDP, udp, redisp_ipout_beg, 3, UDP_KTR_STRING, UDP_KTR_ARGS); 128 KTR_INFO(KTR_UDP, udp, redisp_ipout_end, 4, UDP_KTR_STRING, UDP_KTR_ARGS); 129 KTR_INFO(KTR_UDP, udp, send_redisp, 5, UDP_KTR_STRING, UDP_KTR_ARGS); 130 KTR_INFO(KTR_UDP, udp, send_inswildcard, 6, UDP_KTR_STRING, UDP_KTR_ARGS); 131 132 #define logudp(name, inp) KTR_LOG(udp_##name, inp) 133 134 /* 135 * UDP protocol implementation. 136 * Per RFC 768, August, 1980. 137 */ 138 #ifndef COMPAT_42 139 static int udpcksum = 1; 140 #else 141 static int udpcksum = 0; /* XXX */ 142 #endif 143 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, 144 &udpcksum, 0, "Enable checksumming of UDP packets"); 145 146 int log_in_vain = 0; 147 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW, 148 &log_in_vain, 0, "Log all incoming UDP packets"); 149 150 static int blackhole = 0; 151 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW, 152 &blackhole, 0, "Do not send port unreachables for refused connects"); 153 154 static int strict_mcast_mship = 1; 155 SYSCTL_INT(_net_inet_udp, OID_AUTO, strict_mcast_mship, CTLFLAG_RW, 156 &strict_mcast_mship, 0, "Only send multicast to member sockets"); 157 158 int udp_sosend_async = 1; 159 SYSCTL_INT(_net_inet_udp, OID_AUTO, sosend_async, CTLFLAG_RW, 160 &udp_sosend_async, 0, "UDP asynchronized pru_send"); 161 162 int udp_sosend_prepend = 1; 163 SYSCTL_INT(_net_inet_udp, OID_AUTO, sosend_prepend, CTLFLAG_RW, 164 &udp_sosend_prepend, 0, 165 "Prepend enough space for proto and link header in pru_send"); 166 167 static int udp_reuseport_ext = 1; 168 SYSCTL_INT(_net_inet_udp, OID_AUTO, reuseport_ext, CTLFLAG_RW, 169 &udp_reuseport_ext, 0, "SO_REUSEPORT extension"); 170 171 struct inpcbinfo udbinfo[MAXCPU]; 172 173 #ifndef UDBHASHSIZE 174 #define UDBHASHSIZE 16 175 #endif 176 CTASSERT(powerof2(UDBHASHSIZE)); 177 178 struct udpstat udpstat_percpu[MAXCPU] __cachealign; 179 180 static void udp_append(struct inpcb *last, struct ip *ip, 181 struct mbuf *n, int off, struct sockaddr_in *udp_in); 182 183 static int udp_connect_oncpu(struct inpcb *inp, struct sockaddr_in *sin, 184 struct sockaddr_in *if_sin, uint16_t hash); 185 186 static boolean_t udp_inswildcardhash(struct inpcb *inp, 187 struct netmsg_base *msg, int error); 188 static void udp_remwildcardhash(struct inpcb *inp); 189 190 static __inline int 191 udp_lportcpu(short lport) 192 { 193 return (ntohs(lport) % netisr_ncpus); 194 } 195 196 void 197 udp_init(void) 198 { 199 struct inpcbportinfo *portinfo; 200 int cpu; 201 202 portinfo = kmalloc(sizeof(*portinfo) * netisr_ncpus, M_PCB, 203 M_WAITOK | M_CACHEALIGN); 204 205 for (cpu = 0; cpu < netisr_ncpus; cpu++) { 206 struct inpcbinfo *uicb = &udbinfo[cpu]; 207 208 /* 209 * NOTE: 210 * UDP pcb list, wildcard hash table and localgroup hash 211 * table are shared. 212 */ 213 in_pcbinfo_init(uicb, cpu, TRUE); 214 uicb->hashbase = hashinit(UDBHASHSIZE, M_PCB, &uicb->hashmask); 215 216 in_pcbportinfo_init(&portinfo[cpu], UDBHASHSIZE, cpu); 217 in_pcbportinfo_set(uicb, portinfo, netisr_ncpus); 218 219 uicb->wildcardhashbase = hashinit(UDBHASHSIZE, M_PCB, 220 &uicb->wildcardhashmask); 221 uicb->localgrphashbase = hashinit(UDBHASHSIZE, M_PCB, 222 &uicb->localgrphashmask); 223 224 uicb->ipi_size = sizeof(struct inpcb); 225 } 226 227 /* 228 * Initialize UDP statistics counters for each CPU. 229 */ 230 for (cpu = 0; cpu < netisr_ncpus; ++cpu) 231 bzero(&udpstat_percpu[cpu], sizeof(struct udpstat)); 232 } 233 234 static int 235 sysctl_udpstat(SYSCTL_HANDLER_ARGS) 236 { 237 int cpu, error = 0; 238 239 for (cpu = 0; cpu < netisr_ncpus; ++cpu) { 240 if ((error = SYSCTL_OUT(req, &udpstat_percpu[cpu], 241 sizeof(struct udpstat)))) 242 break; 243 if ((error = SYSCTL_IN(req, &udpstat_percpu[cpu], 244 sizeof(struct udpstat)))) 245 break; 246 } 247 248 return (error); 249 } 250 SYSCTL_PROC(_net_inet_udp, UDPCTL_STATS, stats, (CTLTYPE_OPAQUE | CTLFLAG_RW), 251 0, 0, sysctl_udpstat, "S,udpstat", "UDP statistics"); 252 253 void 254 udp_ctloutput(netmsg_t msg) 255 { 256 struct socket *so = msg->base.nm_so; 257 struct sockopt *sopt = msg->ctloutput.nm_sopt; 258 struct inpcb *inp = so->so_pcb; 259 260 if (inp == NULL) { 261 lwkt_replymsg(&msg->lmsg, EINVAL); 262 return; 263 } 264 265 if (sopt->sopt_level == IPPROTO_IP && sopt->sopt_dir == SOPT_SET) { 266 switch (sopt->sopt_name) { 267 case IP_MULTICAST_IF: 268 case IP_MULTICAST_VIF: 269 case IP_MULTICAST_TTL: 270 case IP_MULTICAST_LOOP: 271 case IP_ADD_MEMBERSHIP: 272 case IP_DROP_MEMBERSHIP: 273 /* 274 * This pr_ctloutput msg will be forwarded 275 * to netisr0 to run; we can't do direct 276 * detaching anymore. 277 * 278 * NOTE: 279 * Don't optimize for the sockets whose 280 * current so_port is netisr0's msgport. 281 * These sockets could be connect(2)'ed 282 * later and the so_port will be changed. 283 */ 284 inp->inp_flags &= ~INP_DIRECT_DETACH; 285 break; 286 } 287 } 288 return ip_ctloutput(msg); 289 } 290 291 /* 292 * Check multicast packets to make sure they are only sent to sockets with 293 * multicast memberships for the packet's destination address and arrival 294 * interface. Multicast packets to multicast-unaware sockets are also 295 * disallowed. 296 * 297 * Returns 0 if the packet is acceptable, -1 if it is not. 298 */ 299 static __inline int 300 check_multicast_membership(const struct ip *ip, const struct inpcb *inp, 301 const struct mbuf *m) 302 { 303 const struct ip_moptions *mopt; 304 int mshipno; 305 306 if (strict_mcast_mship == 0 || 307 !IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { 308 return (0); 309 } 310 311 ASSERT_NETISR0; 312 313 mopt = inp->inp_moptions; 314 if (mopt == NULL) 315 return (-1); 316 for (mshipno = 0; mshipno < mopt->imo_num_memberships; ++mshipno) { 317 const struct in_multi *maddr = mopt->imo_membership[mshipno]; 318 319 if (ip->ip_dst.s_addr == maddr->inm_addr.s_addr && 320 m->m_pkthdr.rcvif == maddr->inm_ifp) { 321 return (0); 322 } 323 } 324 return (-1); 325 } 326 327 struct udp_mcast_arg { 328 struct inpcb *inp; 329 struct inpcb *last; 330 struct ip *ip; 331 struct mbuf *m; 332 int iphlen; 333 struct sockaddr_in *udp_in; 334 }; 335 336 static int 337 udp_mcast_input(struct udp_mcast_arg *arg) 338 { 339 struct inpcb *inp = arg->inp; 340 struct inpcb *last = arg->last; 341 struct ip *ip = arg->ip; 342 struct mbuf *m = arg->m; 343 344 if (check_multicast_membership(ip, inp, m) < 0) 345 return ERESTART; /* caller continue */ 346 347 if (last != NULL) { 348 struct mbuf *n; 349 350 if ((n = m_copypacket(m, M_NOWAIT)) != NULL) 351 udp_append(last, ip, n, 352 arg->iphlen + sizeof(struct udphdr), 353 arg->udp_in); 354 } 355 arg->last = last = inp; 356 357 /* 358 * Don't look for additional matches if this one does 359 * not have either the SO_REUSEPORT or SO_REUSEADDR 360 * socket options set. This heuristic avoids searching 361 * through all pcbs in the common case of a non-shared 362 * port. It * assumes that an application will never 363 * clear these options after setting them. 364 */ 365 if (!(last->inp_socket->so_options & 366 (SO_REUSEPORT | SO_REUSEADDR))) 367 return EJUSTRETURN; /* caller stop */ 368 return 0; 369 } 370 371 int 372 udp_input(struct mbuf **mp, int *offp, int proto) 373 { 374 struct sockaddr_in udp_in = { sizeof udp_in, AF_INET }; 375 int iphlen; 376 struct ip *ip; 377 struct udphdr *uh; 378 struct inpcb *inp; 379 struct mbuf *m; 380 struct mbuf *opts = NULL; 381 int len, off; 382 struct ip save_ip; 383 struct inpcbinfo *pcbinfo = &udbinfo[mycpuid]; 384 385 off = *offp; 386 m = *mp; 387 *mp = NULL; 388 389 iphlen = off; 390 udp_stat.udps_ipackets++; 391 392 /* 393 * Strip IP options, if any; should skip this, 394 * make available to user, and use on returned packets, 395 * but we don't yet have a way to check the checksum 396 * with options still present. 397 */ 398 if (iphlen > sizeof(struct ip)) { 399 ip_stripoptions(m); 400 iphlen = sizeof(struct ip); 401 } 402 403 /* 404 * IP and UDP headers are together in first mbuf. 405 * Already checked and pulled up in ip_demux(). 406 */ 407 KASSERT(m->m_len >= iphlen + sizeof(struct udphdr), 408 ("UDP header not in one mbuf")); 409 410 ip = mtod(m, struct ip *); 411 uh = (struct udphdr *)((caddr_t)ip + iphlen); 412 413 /* destination port of 0 is illegal, based on RFC768. */ 414 if (uh->uh_dport == 0) 415 goto bad; 416 417 /* 418 * Make mbuf data length reflect UDP length. 419 * If not enough data to reflect UDP length, drop. 420 */ 421 len = ntohs((u_short)uh->uh_ulen); 422 if (ip->ip_len != len) { 423 if (len > ip->ip_len || len < sizeof(struct udphdr)) { 424 udp_stat.udps_badlen++; 425 goto bad; 426 } 427 m_adj(m, len - ip->ip_len); 428 /* ip->ip_len = len; */ 429 } 430 /* 431 * Save a copy of the IP header in case we want restore it 432 * for sending an ICMP error message in response. 433 */ 434 save_ip = *ip; 435 436 /* 437 * Checksum extended UDP header and data. 438 */ 439 if (uh->uh_sum) { 440 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 441 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 442 uh->uh_sum = m->m_pkthdr.csum_data; 443 else 444 uh->uh_sum = in_pseudo(ip->ip_src.s_addr, 445 ip->ip_dst.s_addr, htonl((u_short)len + 446 m->m_pkthdr.csum_data + IPPROTO_UDP)); 447 uh->uh_sum ^= 0xffff; 448 } else { 449 char b[9]; 450 451 bcopy(((struct ipovly *)ip)->ih_x1, b, 9); 452 bzero(((struct ipovly *)ip)->ih_x1, 9); 453 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 454 uh->uh_sum = in_cksum(m, len + sizeof(struct ip)); 455 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9); 456 } 457 if (uh->uh_sum) { 458 udp_stat.udps_badsum++; 459 m_freem(m); 460 return(IPPROTO_DONE); 461 } 462 } else 463 udp_stat.udps_nosum++; 464 465 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || 466 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 467 struct inpcbhead *connhead; 468 struct inpcontainer *ic, *ic_marker; 469 struct inpcontainerhead *ichead; 470 struct udp_mcast_arg arg; 471 struct inpcb *last; 472 int error; 473 474 /* 475 * Deliver a multicast or broadcast datagram to *all* sockets 476 * for which the local and remote addresses and ports match 477 * those of the incoming datagram. This allows more than 478 * one process to receive multi/broadcasts on the same port. 479 * (This really ought to be done for unicast datagrams as 480 * well, but that would cause problems with existing 481 * applications that open both address-specific sockets and 482 * a wildcard socket listening to the same port -- they would 483 * end up receiving duplicates of every unicast datagram. 484 * Those applications open the multiple sockets to overcome an 485 * inadequacy of the UDP socket interface, but for backwards 486 * compatibility we avoid the problem here rather than 487 * fixing the interface. Maybe 4.5BSD will remedy this?) 488 */ 489 490 /* 491 * Construct sockaddr format source address. 492 */ 493 udp_in.sin_port = uh->uh_sport; 494 udp_in.sin_addr = ip->ip_src; 495 arg.udp_in = &udp_in; 496 /* 497 * Locate pcb(s) for datagram. 498 * (Algorithm copied from raw_intr().) 499 */ 500 last = NULL; 501 arg.iphlen = iphlen; 502 503 connhead = &pcbinfo->hashbase[ 504 INP_PCBCONNHASH(ip->ip_src.s_addr, uh->uh_sport, 505 ip->ip_dst.s_addr, uh->uh_dport, pcbinfo->hashmask)]; 506 LIST_FOREACH(inp, connhead, inp_hash) { 507 #ifdef INET6 508 if (!INP_ISIPV4(inp)) 509 continue; 510 #endif 511 if (!in_hosteq(inp->inp_faddr, ip->ip_src) || 512 !in_hosteq(inp->inp_laddr, ip->ip_dst) || 513 inp->inp_fport != uh->uh_sport || 514 inp->inp_lport != uh->uh_dport) 515 continue; 516 517 arg.inp = inp; 518 arg.last = last; 519 arg.ip = ip; 520 arg.m = m; 521 522 error = udp_mcast_input(&arg); 523 if (error == ERESTART) 524 continue; 525 last = arg.last; 526 527 if (error == EJUSTRETURN) 528 goto done; 529 } 530 531 ichead = &pcbinfo->wildcardhashbase[ 532 INP_PCBWILDCARDHASH(uh->uh_dport, 533 pcbinfo->wildcardhashmask)]; 534 ic_marker = in_pcbcontainer_marker(); 535 536 GET_PCBINFO_TOKEN(pcbinfo); 537 LIST_INSERT_HEAD(ichead, ic_marker, ic_list); 538 while ((ic = LIST_NEXT(ic_marker, ic_list)) != NULL) { 539 LIST_REMOVE(ic_marker, ic_list); 540 LIST_INSERT_AFTER(ic, ic_marker, ic_list); 541 542 inp = ic->ic_inp; 543 if (inp->inp_flags & INP_PLACEMARKER) 544 continue; 545 #ifdef INET6 546 if (!INP_ISIPV4(inp)) 547 continue; 548 #endif 549 if (inp->inp_lport != uh->uh_dport) 550 continue; 551 if (inp->inp_laddr.s_addr != INADDR_ANY && 552 inp->inp_laddr.s_addr != ip->ip_dst.s_addr) 553 continue; 554 555 arg.inp = inp; 556 arg.last = last; 557 arg.ip = ip; 558 arg.m = m; 559 560 error = udp_mcast_input(&arg); 561 if (error == ERESTART) 562 continue; 563 last = arg.last; 564 565 if (error == EJUSTRETURN) 566 break; 567 } 568 LIST_REMOVE(ic_marker, ic_list); 569 REL_PCBINFO_TOKEN(pcbinfo); 570 done: 571 if (last == NULL) { 572 /* 573 * No matching pcb found; discard datagram. 574 * (No need to send an ICMP Port Unreachable 575 * for a broadcast or multicast datgram.) 576 */ 577 udp_stat.udps_noportbcast++; 578 goto bad; 579 } 580 udp_append(last, ip, m, iphlen + sizeof(struct udphdr), 581 &udp_in); 582 return(IPPROTO_DONE); 583 } 584 /* 585 * Locate pcb for datagram. 586 */ 587 inp = in_pcblookup_pkthash(pcbinfo, ip->ip_src, uh->uh_sport, 588 ip->ip_dst, uh->uh_dport, TRUE, m->m_pkthdr.rcvif, 589 udp_reuseport_ext ? m : NULL); 590 if (inp == NULL) { 591 if (log_in_vain) { 592 char src[INET_ADDRSTRLEN], dst[INET_ADDRSTRLEN]; 593 594 log(LOG_INFO, 595 "Connection attempt to UDP %s:%d from %s:%d\n", 596 kinet_ntoa(ip->ip_dst, dst), ntohs(uh->uh_dport), 597 kinet_ntoa(ip->ip_src, src), ntohs(uh->uh_sport)); 598 } 599 udp_stat.udps_noport++; 600 if (m->m_flags & (M_BCAST | M_MCAST)) { 601 udp_stat.udps_noportbcast++; 602 goto bad; 603 } 604 if (blackhole) 605 goto bad; 606 #ifdef ICMP_BANDLIM 607 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0) 608 goto bad; 609 #endif 610 *ip = save_ip; 611 ip->ip_len += iphlen; 612 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 613 return(IPPROTO_DONE); 614 } 615 KASSERT(INP_ISIPV4(inp), ("not inet inpcb")); 616 /* 617 * Check the minimum TTL for socket. 618 */ 619 if (ip->ip_ttl < inp->inp_ip_minttl) 620 goto bad; 621 622 /* 623 * Construct sockaddr format source address. 624 * Stuff source address and datagram in user buffer. 625 */ 626 udp_in.sin_port = uh->uh_sport; 627 udp_in.sin_addr = ip->ip_src; 628 if ((inp->inp_flags & INP_CONTROLOPTS) || 629 (inp->inp_socket->so_options & SO_TIMESTAMP)) 630 ip_savecontrol(inp, &opts, ip, m); 631 m_adj(m, iphlen + sizeof(struct udphdr)); 632 633 lwkt_gettoken(&inp->inp_socket->so_rcv.ssb_token); 634 if (ssb_appendaddr(&inp->inp_socket->so_rcv, 635 (struct sockaddr *)&udp_in, m, opts) == 0) { 636 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token); 637 udp_stat.udps_fullsock++; 638 soroverflow(inp->inp_socket); 639 goto bad; 640 } 641 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token); 642 sorwakeup(inp->inp_socket); 643 return(IPPROTO_DONE); 644 bad: 645 m_freem(m); 646 if (opts) 647 m_freem(opts); 648 return(IPPROTO_DONE); 649 } 650 651 /* 652 * subroutine of udp_input(), mainly for source code readability. 653 * caller must properly init udp_ip6 and udp_in6 beforehand. 654 */ 655 static void 656 udp_append(struct inpcb *last, struct ip *ip, struct mbuf *n, int off, 657 struct sockaddr_in *udp_in) 658 { 659 struct mbuf *opts = NULL; 660 int ret; 661 662 KASSERT(INP_ISIPV4(last), ("not inet inpcb")); 663 664 if (last->inp_flags & INP_CONTROLOPTS || 665 last->inp_socket->so_options & SO_TIMESTAMP) 666 ip_savecontrol(last, &opts, ip, n); 667 m_adj(n, off); 668 669 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token); 670 ret = ssb_appendaddr(&last->inp_socket->so_rcv, 671 (struct sockaddr *)udp_in, n, opts); 672 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token); 673 if (ret == 0) { 674 m_freem(n); 675 if (opts) 676 m_freem(opts); 677 udp_stat.udps_fullsock++; 678 } else { 679 sorwakeup(last->inp_socket); 680 } 681 } 682 683 /* 684 * Notify a udp user of an asynchronous error; 685 * just wake up so that he can collect error status. 686 */ 687 void 688 udp_notify(struct inpcb *inp, int error) 689 { 690 inp->inp_socket->so_error = error; 691 sorwakeup(inp->inp_socket); 692 sowwakeup(inp->inp_socket); 693 } 694 695 struct netmsg_udp_notify { 696 struct netmsg_base base; 697 inp_notify_t nm_notify; 698 struct in_addr nm_faddr; 699 int nm_arg; 700 }; 701 702 static void 703 udp_notifyall_oncpu(netmsg_t msg) 704 { 705 struct netmsg_udp_notify *nm = (struct netmsg_udp_notify *)msg; 706 int nextcpu, cpu = mycpuid; 707 708 ASSERT_NETISR_NCPUS(cpu); 709 710 in_pcbnotifyall(&udbinfo[cpu], nm->nm_faddr, nm->nm_arg, nm->nm_notify); 711 712 nextcpu = cpu + 1; 713 if (nextcpu < netisr_ncpus) 714 lwkt_forwardmsg(netisr_cpuport(nextcpu), &nm->base.lmsg); 715 else 716 lwkt_replymsg(&nm->base.lmsg, 0); 717 } 718 719 inp_notify_t 720 udp_get_inpnotify(int cmd, const struct sockaddr *sa, 721 struct ip **ip0, int *cpuid) 722 { 723 struct in_addr faddr; 724 struct ip *ip = *ip0; 725 inp_notify_t notify = udp_notify; 726 727 faddr = ((const struct sockaddr_in *)sa)->sin_addr; 728 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY) 729 return NULL; 730 731 if (PRC_IS_REDIRECT(cmd)) { 732 ip = NULL; 733 notify = in_rtchange; 734 } else if (cmd == PRC_HOSTDEAD) { 735 ip = NULL; 736 } else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) { 737 return NULL; 738 } 739 740 if (cpuid != NULL) { 741 if (ip == NULL) { 742 /* Go through all effective netisr CPUs. */ 743 *cpuid = netisr_ncpus; 744 } else { 745 const struct udphdr *uh; 746 747 uh = (const struct udphdr *) 748 ((caddr_t)ip + (ip->ip_hl << 2)); 749 *cpuid = udp_addrcpu(faddr.s_addr, uh->uh_dport, 750 ip->ip_src.s_addr, uh->uh_sport); 751 } 752 } 753 754 *ip0 = ip; 755 return notify; 756 } 757 758 void 759 udp_ctlinput(netmsg_t msg) 760 { 761 struct sockaddr *sa = msg->ctlinput.nm_arg; 762 struct ip *ip = msg->ctlinput.nm_extra; 763 int cmd = msg->ctlinput.nm_cmd, cpuid; 764 inp_notify_t notify; 765 struct in_addr faddr; 766 767 ASSERT_NETISR_NCPUS(mycpuid); 768 769 notify = udp_get_inpnotify(cmd, sa, &ip, &cpuid); 770 if (notify == NULL) 771 goto done; 772 773 faddr = ((struct sockaddr_in *)sa)->sin_addr; 774 if (ip) { 775 const struct udphdr *uh; 776 struct inpcb *inp; 777 778 if (cpuid != mycpuid) 779 goto done; 780 781 uh = (const struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 782 inp = in_pcblookup_hash(&udbinfo[mycpuid], faddr, uh->uh_dport, 783 ip->ip_src, uh->uh_sport, 0, NULL); 784 if (inp != NULL && inp->inp_socket != NULL) 785 notify(inp, inetctlerrmap[cmd]); 786 } else if (msg->ctlinput.nm_direct) { 787 if (cpuid != netisr_ncpus && cpuid != mycpuid) 788 goto done; 789 790 in_pcbnotifyall(&udbinfo[mycpuid], faddr, inetctlerrmap[cmd], 791 notify); 792 } else { 793 struct netmsg_udp_notify *nm; 794 795 ASSERT_NETISR0; 796 nm = kmalloc(sizeof(*nm), M_LWKTMSG, M_INTWAIT); 797 netmsg_init(&nm->base, NULL, &netisr_afree_rport, 798 0, udp_notifyall_oncpu); 799 nm->nm_faddr = faddr; 800 nm->nm_arg = inetctlerrmap[cmd]; 801 nm->nm_notify = notify; 802 lwkt_sendmsg(netisr_cpuport(0), &nm->base.lmsg); 803 } 804 done: 805 lwkt_replymsg(&msg->lmsg, 0); 806 } 807 808 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, udbinfo, 0, 809 in_pcblist_ncpus, "S,xinpcb", "List of active UDP sockets"); 810 811 static int 812 udp_getcred(SYSCTL_HANDLER_ARGS) 813 { 814 struct sockaddr_in addrs[2]; 815 struct ucred cred0, *cred = NULL; 816 struct inpcb *inp; 817 int error, cpu, origcpu; 818 819 error = priv_check(req->td, PRIV_ROOT); 820 if (error) 821 return (error); 822 error = SYSCTL_IN(req, addrs, sizeof addrs); 823 if (error) 824 return (error); 825 826 origcpu = mycpuid; 827 cpu = udp_addrcpu(addrs[1].sin_addr.s_addr, addrs[1].sin_port, 828 addrs[0].sin_addr.s_addr, addrs[0].sin_port); 829 830 lwkt_migratecpu(cpu); 831 832 inp = in_pcblookup_hash(&udbinfo[cpu], 833 addrs[1].sin_addr, addrs[1].sin_port, 834 addrs[0].sin_addr, addrs[0].sin_port, TRUE, NULL); 835 if (inp == NULL || inp->inp_socket == NULL) { 836 error = ENOENT; 837 } else if (inp->inp_socket->so_cred != NULL) { 838 cred0 = *(inp->inp_socket->so_cred); 839 cred = &cred0; 840 } 841 842 lwkt_migratecpu(origcpu); 843 844 if (error) 845 return error; 846 847 return SYSCTL_OUT(req, cred, sizeof(struct ucred)); 848 } 849 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 850 0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection"); 851 852 static void 853 udp_send_redispatch(netmsg_t msg) 854 { 855 struct mbuf *m = msg->send.nm_m; 856 int pru_flags = msg->send.nm_flags; 857 struct inpcb *inp = msg->send.base.nm_so->so_pcb; 858 struct mbuf *m_opt = msg->send.nm_control; /* XXX save ipopt */ 859 int flags = msg->send.nm_priv; /* ip_output flags */ 860 int error; 861 862 logudp(redisp_ipout_beg, inp); 863 864 /* 865 * - Don't use inp route cache. It should only be used in the 866 * inp owner netisr. 867 * - Access to inp_moptions should be safe, since multicast UDP 868 * datagrams are redispatched to netisr0 and inp_moptions is 869 * changed only in netisr0. 870 */ 871 error = ip_output(m, m_opt, NULL, flags, inp->inp_moptions, inp); 872 if ((pru_flags & PRUS_NOREPLY) == 0) 873 lwkt_replymsg(&msg->send.base.lmsg, error); 874 875 if (m_opt != NULL) { 876 /* Free saved ip options, if any */ 877 m_freem(m_opt); 878 } 879 880 logudp(redisp_ipout_end, inp); 881 } 882 883 static void 884 udp_send(netmsg_t msg) 885 { 886 struct socket *so = msg->send.base.nm_so; 887 struct mbuf *m = msg->send.nm_m; 888 struct sockaddr *dstaddr = msg->send.nm_addr; 889 int pru_flags = msg->send.nm_flags; 890 struct inpcb *inp = so->so_pcb; 891 struct thread *td = msg->send.nm_td; 892 struct mbuf *control = msg->send.nm_control; 893 uint16_t hash; 894 int flags; 895 896 struct udpiphdr *ui; 897 int len = m->m_pkthdr.len; 898 struct sockaddr_in *sin; /* really is initialized before use */ 899 int error = 0, cpu; 900 struct sockaddr_in src; 901 struct in_addr laddr; 902 u_char tos; 903 904 logudp(send_beg, inp); 905 906 if (inp == NULL) { 907 error = EINVAL; 908 goto release; 909 } 910 911 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { 912 error = EMSGSIZE; 913 goto release; 914 } 915 916 if (inp->inp_lport == 0) { /* unbound socket */ 917 boolean_t forwarded; 918 919 error = in_pcbbind(inp, NULL, td); 920 if (error) 921 goto release; 922 923 /* 924 * Need to call udp_send again, after this inpcb is 925 * inserted into wildcard hash table. 926 */ 927 msg->send.base.lmsg.ms_flags |= MSGF_UDP_SEND; 928 forwarded = udp_inswildcardhash(inp, &msg->send.base, 0); 929 if (forwarded) { 930 /* 931 * The message is further forwarded, so we are 932 * done here. 933 */ 934 logudp(send_inswildcard, inp); 935 return; 936 } 937 } 938 939 tos = inp->inp_ip_tos; 940 src.sin_family = 0; 941 if (control != NULL) { 942 struct cmsghdr *cm; 943 944 /* 945 * XXX: Currently, we assume all the optional information is 946 * stored in a single mbuf. 947 */ 948 if (control->m_next) { 949 error = EINVAL; 950 goto release; 951 } 952 for (; control->m_len > 0; 953 control->m_data += CMSG_ALIGN(cm->cmsg_len), 954 control->m_len -= CMSG_ALIGN(cm->cmsg_len)) { 955 cm = mtod(control, struct cmsghdr *); 956 if (control->m_len < sizeof(*cm) || 957 cm->cmsg_len == 0 || 958 cm->cmsg_len > control->m_len) { 959 error = EINVAL; 960 goto release; 961 } 962 if (cm->cmsg_level != IPPROTO_IP) 963 continue; 964 965 switch (cm->cmsg_type) { 966 case IP_SENDSRCADDR: 967 if (cm->cmsg_len != 968 CMSG_LEN(sizeof(struct in_addr))) { 969 error = EINVAL; 970 goto release; 971 } 972 src.sin_family = AF_INET; 973 src.sin_len = sizeof(src); 974 src.sin_addr = *(struct in_addr *)CMSG_DATA(cm); 975 break; 976 977 case IP_TOS: 978 if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) { 979 error = EINVAL; 980 goto release; 981 } 982 tos = *(u_char *)CMSG_DATA(cm); 983 break; 984 985 default: 986 error = ENOPROTOOPT; 987 goto release; 988 } 989 } 990 KKASSERT(error == 0); 991 992 m_freem(control); 993 control = NULL; 994 } 995 996 /* 997 * If the IP_SENDSRCADDR control message was specified, override the 998 * source address for this datagram. Its use is invalidated if the 999 * address thus specified is incomplete or clobbers other inpcbs. 1000 */ 1001 laddr = inp->inp_laddr; 1002 if (src.sin_family == AF_INET) { 1003 error = in_pcbsrcaddr_check(inp, &src, &laddr, td); 1004 if (error) 1005 goto release; 1006 } 1007 1008 if (dstaddr != NULL) { /* destination address specified */ 1009 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1010 /* already connected */ 1011 error = EISCONN; 1012 goto release; 1013 } 1014 sin = (struct sockaddr_in *)dstaddr; 1015 } else { 1016 if (inp->inp_faddr.s_addr == INADDR_ANY) { 1017 /* no destination specified and not already connected */ 1018 error = ENOTCONN; 1019 goto release; 1020 } 1021 sin = NULL; 1022 } 1023 1024 /* 1025 * Calculate data length and get a mbuf 1026 * for UDP and IP headers. 1027 */ 1028 M_PREPEND(m, sizeof(struct udpiphdr), M_NOWAIT); 1029 if (m == NULL) { 1030 error = ENOBUFS; 1031 goto release; 1032 } 1033 1034 /* 1035 * Fill in mbuf with extended UDP header 1036 * and addresses and length put into network format. 1037 */ 1038 ui = mtod(m, struct udpiphdr *); 1039 bzero(ui->ui_x1, sizeof ui->ui_x1); /* XXX still needed? */ 1040 ui->ui_pr = IPPROTO_UDP; 1041 1042 /* 1043 * Set destination address. 1044 */ 1045 if (dstaddr != NULL) { /* use specified destination */ 1046 ui->ui_dst = sin->sin_addr; 1047 ui->ui_dport = sin->sin_port; 1048 } else { /* use connected destination */ 1049 ui->ui_dst = inp->inp_faddr; 1050 ui->ui_dport = inp->inp_fport; 1051 } 1052 1053 /* 1054 * Set source address. 1055 */ 1056 if (laddr.s_addr == INADDR_ANY || IN_MULTICAST(ntohl(laddr.s_addr))) { 1057 struct sockaddr_in *if_sin; 1058 1059 if (dstaddr == NULL) { 1060 /* 1061 * connect() had (or should have) failed because 1062 * the interface had no IP address, but the 1063 * application proceeded to call send() anyways. 1064 */ 1065 error = ENOTCONN; 1066 goto release; 1067 } 1068 1069 /* Look up outgoing interface. */ 1070 error = in_pcbladdr_find(inp, dstaddr, &if_sin, td, 1); 1071 if (error) 1072 goto release; 1073 ui->ui_src = if_sin->sin_addr; /* use address of interface */ 1074 } else { 1075 ui->ui_src = laddr; /* use non-null bound address */ 1076 } 1077 ui->ui_sport = inp->inp_lport; 1078 KASSERT(inp->inp_lport != 0, ("inp lport should have been bound")); 1079 1080 /* 1081 * Release the original thread, since it is no longer used 1082 */ 1083 if (pru_flags & PRUS_HELDTD) { 1084 lwkt_rele(td); 1085 pru_flags &= ~PRUS_HELDTD; 1086 } 1087 /* 1088 * Free the dest address, since it is no longer needed 1089 */ 1090 if (pru_flags & PRUS_FREEADDR) { 1091 kfree(dstaddr, M_SONAME); 1092 pru_flags &= ~PRUS_FREEADDR; 1093 } 1094 1095 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr)); 1096 1097 /* 1098 * Set up checksum and output datagram. 1099 */ 1100 if (udpcksum) { 1101 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr, 1102 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP)); 1103 m->m_pkthdr.csum_flags = CSUM_UDP; 1104 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 1105 m->m_pkthdr.csum_thlen = sizeof(struct udphdr); 1106 } else { 1107 ui->ui_sum = 0; 1108 } 1109 ((struct ip *)ui)->ip_len = sizeof(struct udpiphdr) + len; 1110 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */ 1111 ((struct ip *)ui)->ip_tos = tos; 1112 udp_stat.udps_opackets++; 1113 1114 flags = IP_DEBUGROUTE | 1115 (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)); 1116 if (pru_flags & PRUS_DONTROUTE) 1117 flags |= SO_DONTROUTE; 1118 1119 /* 1120 * NOTE: 1121 * For multicast bound and connected socket, source address of 1122 * the datagram is selected at the time of the sending, so the 1123 * datagram will have to be hashed. 1124 */ 1125 if ((inp->inp_flags & INP_CONNECTED) && 1126 ui->ui_src.s_addr == inp->inp_laddr.s_addr) { 1127 /* 1128 * For connected socket, this datagram has already 1129 * been in the correct netisr; no need to rehash. 1130 */ 1131 KASSERT(inp->inp_flags & INP_HASH, ("inpcb has no hash")); 1132 m_sethash(m, inp->inp_hashval); 1133 goto sendit; 1134 } 1135 1136 hash = udp_addrhash(ui->ui_dst.s_addr, ui->ui_dport, 1137 ui->ui_src.s_addr, ui->ui_sport); 1138 m_sethash(m, hash); 1139 1140 cpu = netisr_hashcpu(hash); 1141 if (cpu != mycpuid) { 1142 struct mbuf *m_opt = NULL; 1143 struct netmsg_pru_send *smsg; 1144 struct lwkt_port *port = netisr_cpuport(cpu); 1145 1146 if (inp->inp_flags & INP_DIRECT_DETACH) { 1147 /* 1148 * No longer direct detachable, i.e. datagram has 1149 * to be forwarded to other CPUs for multicast 1150 * bound and connected socket. 1151 */ 1152 inp->inp_flags &= ~INP_DIRECT_DETACH; 1153 } 1154 1155 /* 1156 * Not on the CPU that matches this UDP datagram hash; 1157 * redispatch to the correct CPU to do the ip_output(). 1158 */ 1159 if (inp->inp_options != NULL) { 1160 /* 1161 * If there are ip options, then save a copy, 1162 * since accessing inp_options on other CPUs' 1163 * is not safe. 1164 * 1165 * XXX optimize this? 1166 */ 1167 m_opt = m_copym(inp->inp_options, 0, M_COPYALL, 1168 M_WAITOK); 1169 } 1170 if ((pru_flags & PRUS_NOREPLY) == 0) { 1171 /* 1172 * Change some parts of the original netmsg and 1173 * forward it to the target netisr. 1174 * 1175 * NOTE: so_port MUST NOT be checked in the target 1176 * netisr. 1177 */ 1178 smsg = &msg->send; 1179 smsg->nm_priv = flags; /* ip_output flags */ 1180 smsg->nm_m = m; 1181 smsg->nm_control = m_opt; /* XXX save ipopt */ 1182 smsg->base.lmsg.ms_flags |= MSGF_IGNSOPORT; 1183 smsg->base.nm_dispatch = udp_send_redispatch; 1184 lwkt_forwardmsg(port, &smsg->base.lmsg); 1185 } else { 1186 /* 1187 * Recreate the netmsg, since the original mbuf 1188 * could have been changed. And send it to the 1189 * target netisr. 1190 * 1191 * NOTE: so_port MUST NOT be checked in the target 1192 * netisr. 1193 */ 1194 smsg = &m->m_hdr.mh_sndmsg; 1195 netmsg_init(&smsg->base, so, &netisr_apanic_rport, 1196 MSGF_IGNSOPORT, udp_send_redispatch); 1197 smsg->nm_priv = flags; /* ip_output flags */ 1198 smsg->nm_flags = pru_flags; 1199 smsg->nm_m = m; 1200 smsg->nm_control = m_opt; /* XXX save ipopt */ 1201 lwkt_sendmsg(port, &smsg->base.lmsg); 1202 } 1203 1204 /* This UDP datagram is redispatched; done */ 1205 logudp(send_redisp, inp); 1206 return; 1207 } 1208 1209 sendit: 1210 logudp(send_ipout, inp); 1211 error = ip_output(m, inp->inp_options, &inp->inp_route, flags, 1212 inp->inp_moptions, inp); 1213 m = NULL; 1214 1215 release: 1216 if (m != NULL) 1217 m_freem(m); 1218 if (control != NULL) 1219 m_freem(control); 1220 1221 if (pru_flags & PRUS_HELDTD) 1222 lwkt_rele(td); 1223 if (pru_flags & PRUS_FREEADDR) 1224 kfree(dstaddr, M_SONAME); 1225 if ((pru_flags & PRUS_NOREPLY) == 0) 1226 lwkt_replymsg(&msg->send.base.lmsg, error); 1227 1228 logudp(send_end, inp); 1229 } 1230 1231 u_long udp_sendspace = 9216; /* really max datagram size */ 1232 /* 40 1K datagrams */ 1233 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW, 1234 &udp_sendspace, 0, "Maximum outgoing UDP datagram size"); 1235 1236 u_long udp_recvspace = 40 * (1024 + 1237 #ifdef INET6 1238 sizeof(struct sockaddr_in6) 1239 #else 1240 sizeof(struct sockaddr_in) 1241 #endif 1242 ); 1243 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW, 1244 &udp_recvspace, 0, "Maximum incoming UDP datagram size"); 1245 1246 /* 1247 * This should never happen, since UDP socket does not support 1248 * connection acception (SO_ACCEPTCONN, i.e. listen(2)). 1249 */ 1250 static void 1251 udp_abort(netmsg_t msg __unused) 1252 { 1253 panic("udp_abort is called"); 1254 } 1255 1256 static int 1257 udp_preattach(struct socket *so, int proto __unused, struct pru_attach_info *ai) 1258 { 1259 return soreserve(so, udp_sendspace, udp_recvspace, ai->sb_rlimit); 1260 } 1261 1262 static void 1263 udp_attach(netmsg_t msg) 1264 { 1265 struct socket *so = msg->attach.base.nm_so; 1266 struct pru_attach_info *ai = msg->attach.nm_ai; 1267 struct inpcb *inp; 1268 int error; 1269 1270 KASSERT(so->so_pcb == NULL, ("udp socket attached")); 1271 1272 if (ai != NULL) { 1273 error = udp_preattach(so, 0 /* don't care */, ai); 1274 if (error) 1275 goto out; 1276 } else { 1277 /* Post attach; do nothing */ 1278 } 1279 1280 error = in_pcballoc(so, &udbinfo[mycpuid]); 1281 if (error) 1282 goto out; 1283 1284 inp = so->so_pcb; 1285 inp->inp_flags |= INP_DIRECT_DETACH; 1286 inp->inp_ip_ttl = ip_defttl; 1287 error = 0; 1288 out: 1289 lwkt_replymsg(&msg->attach.base.lmsg, error); 1290 } 1291 1292 static void 1293 udp_inswildcard_replymsg(netmsg_t msg) 1294 { 1295 lwkt_msg_t lmsg = &msg->lmsg; 1296 1297 if (lmsg->ms_flags & MSGF_UDP_SEND) { 1298 udp_send(msg); 1299 /* msg is replied by udp_send() */ 1300 } else { 1301 lwkt_replymsg(lmsg, lmsg->ms_error); 1302 } 1303 } 1304 1305 static void 1306 udp_soreuseport_dispatch(netmsg_t msg) 1307 { 1308 /* This inpcb has already been in the wildcard hash. */ 1309 in_pcblink_flags(msg->base.nm_so->so_pcb, &udbinfo[mycpuid], 0); 1310 udp_inswildcard_replymsg(msg); 1311 } 1312 1313 static void 1314 udp_sosetport(struct lwkt_msg *msg, lwkt_port_t port) 1315 { 1316 sosetport(((struct netmsg_base *)msg)->nm_so, port); 1317 } 1318 1319 static boolean_t 1320 udp_inswildcardhash_oncpu(struct inpcb *inp, struct netmsg_base *msg) 1321 { 1322 int cpu; 1323 1324 KASSERT(inp->inp_pcbinfo == &udbinfo[mycpuid], 1325 ("not on owner cpu")); 1326 1327 in_pcbinswildcardhash(inp); 1328 for (cpu = 0; cpu < netisr_ncpus; ++cpu) { 1329 if (cpu == mycpuid) { 1330 /* 1331 * This inpcb has been inserted by the above 1332 * in_pcbinswildcardhash(). 1333 */ 1334 continue; 1335 } 1336 in_pcbinswildcardhash_oncpu(inp, &udbinfo[cpu]); 1337 } 1338 1339 /* NOTE: inp_lgrpindex is _not_ assigned in jail. */ 1340 if ((inp->inp_socket->so_options & SO_REUSEPORT) && 1341 inp->inp_lgrpindex >= 0) { 1342 /* 1343 * For SO_REUSEPORT socket, redistribute it based on its 1344 * local group index. 1345 */ 1346 cpu = inp->inp_lgrpindex % netisr_ncpus; 1347 if (cpu != mycpuid) { 1348 struct lwkt_port *port = netisr_cpuport(cpu); 1349 lwkt_msg_t lmsg = &msg->lmsg; 1350 1351 /* 1352 * We are moving the protocol processing port the 1353 * socket is on, we have to unlink here and re-link 1354 * on the target cpu (this inpcb is still left in 1355 * the wildcard hash). 1356 */ 1357 in_pcbunlink_flags(inp, &udbinfo[mycpuid], 0); 1358 msg->nm_dispatch = udp_soreuseport_dispatch; 1359 1360 /* 1361 * See the related comment in tcp_usrreq.c 1362 * tcp_connect() 1363 */ 1364 lwkt_setmsg_receipt(lmsg, udp_sosetport); 1365 lwkt_forwardmsg(port, lmsg); 1366 return TRUE; /* forwarded */ 1367 } 1368 } 1369 return FALSE; 1370 } 1371 1372 static void 1373 udp_inswildcardhash_dispatch(netmsg_t msg) 1374 { 1375 struct inpcb *inp = msg->base.nm_so->so_pcb; 1376 boolean_t forwarded; 1377 1378 KASSERT(inp->inp_lport != 0, ("local port not set yet")); 1379 KASSERT(udp_lportcpu(inp->inp_lport) == mycpuid, ("not target cpu")); 1380 1381 in_pcblink(inp, &udbinfo[mycpuid]); 1382 1383 forwarded = udp_inswildcardhash_oncpu(inp, &msg->base); 1384 if (forwarded) { 1385 /* The message is further forwarded, so we are done here. */ 1386 return; 1387 } 1388 udp_inswildcard_replymsg(msg); 1389 } 1390 1391 static boolean_t 1392 udp_inswildcardhash(struct inpcb *inp, struct netmsg_base *msg, int error) 1393 { 1394 lwkt_msg_t lmsg = &msg->lmsg; 1395 int cpu; 1396 1397 ASSERT_INP_NOTINHASH(inp); 1398 1399 /* This inpcb could no longer be directly detached */ 1400 inp->inp_flags &= ~INP_DIRECT_DETACH; 1401 1402 /* 1403 * Always clear the route cache, so we don't need to 1404 * worry about any owner CPU changes later. 1405 */ 1406 in_pcbresetroute(inp); 1407 1408 KASSERT(inp->inp_lport != 0, ("local port not set yet")); 1409 cpu = udp_lportcpu(inp->inp_lport); 1410 1411 lmsg->ms_error = error; 1412 if (cpu != mycpuid) { 1413 struct lwkt_port *port = netisr_cpuport(cpu); 1414 1415 /* 1416 * We are moving the protocol processing port the socket 1417 * is on, we have to unlink here and re-link on the 1418 * target cpu. 1419 */ 1420 in_pcbunlink(inp, &udbinfo[mycpuid]); 1421 msg->nm_dispatch = udp_inswildcardhash_dispatch; 1422 1423 /* See the related comment in tcp_usrreq.c tcp_connect() */ 1424 lwkt_setmsg_receipt(lmsg, udp_sosetport); 1425 lwkt_forwardmsg(port, lmsg); 1426 return TRUE; /* forwarded */ 1427 } 1428 1429 return udp_inswildcardhash_oncpu(inp, msg); 1430 } 1431 1432 static void 1433 udp_bind(netmsg_t msg) 1434 { 1435 struct socket *so = msg->bind.base.nm_so; 1436 struct inpcb *inp; 1437 int error; 1438 1439 inp = so->so_pcb; 1440 if (inp) { 1441 struct sockaddr *nam = msg->bind.nm_nam; 1442 struct thread *td = msg->bind.nm_td; 1443 struct sockaddr_in *sin; 1444 lwkt_port_t port; 1445 int cpu; 1446 1447 /* 1448 * Check "already bound" here (in_pcbbind() does the same 1449 * check though), so we don't forward a connected/bound 1450 * socket randomly which would panic in the following 1451 * in_pcbunlink(). 1452 */ 1453 if (inp->inp_lport != 0 || 1454 inp->inp_laddr.s_addr != INADDR_ANY) { 1455 error = EINVAL; /* already bound */ 1456 goto done; 1457 } 1458 1459 if (nam->sa_len != sizeof(*sin)) { 1460 error = EINVAL; 1461 goto done; 1462 } 1463 sin = (struct sockaddr_in *)nam; 1464 1465 cpu = udp_lportcpu(sin->sin_port); 1466 port = netisr_cpuport(cpu); 1467 1468 /* 1469 * See the related comment in tcp_usrreq.c tcp_usr_bind(). 1470 * The exception is that we use local port based netisr 1471 * to serialize in_pcbbind(). 1472 */ 1473 if (&curthread->td_msgport != port) { 1474 lwkt_msg_t lmsg = &msg->bind.base.lmsg; 1475 1476 KASSERT((msg->bind.nm_flags & PRUB_RELINK) == 0, 1477 ("already asked to relink")); 1478 1479 in_pcbunlink(so->so_pcb, &udbinfo[mycpuid]); 1480 msg->bind.nm_flags |= PRUB_RELINK; 1481 1482 /* 1483 * See the related comment in tcp_usrreq.c 1484 * tcp_connect(). 1485 */ 1486 lwkt_setmsg_receipt(lmsg, udp_sosetport); 1487 lwkt_forwardmsg(port, lmsg); 1488 /* msg invalid now */ 1489 return; 1490 } 1491 KASSERT(so->so_port == port, ("so_port is not netisr%d", cpu)); 1492 1493 if (msg->bind.nm_flags & PRUB_RELINK) { 1494 msg->bind.nm_flags &= ~PRUB_RELINK; 1495 in_pcblink(so->so_pcb, &udbinfo[mycpuid]); 1496 } 1497 KASSERT(inp->inp_pcbinfo == &udbinfo[cpu], 1498 ("pcbinfo is not udbinfo%d", cpu)); 1499 1500 error = in_pcbbind(inp, nam, td); 1501 if (error == 0) { 1502 boolean_t forwarded; 1503 1504 if (sin->sin_addr.s_addr != INADDR_ANY) 1505 inp->inp_flags |= INP_WASBOUND_NOTANY; 1506 1507 forwarded = udp_inswildcardhash(inp, 1508 &msg->bind.base, 0); 1509 if (forwarded) { 1510 /* 1511 * The message is further forwarded, so 1512 * we are done here. 1513 */ 1514 return; 1515 } 1516 } 1517 } else { 1518 error = EINVAL; 1519 } 1520 done: 1521 lwkt_replymsg(&msg->bind.base.lmsg, error); 1522 } 1523 1524 static int 1525 udp_preconnect(struct socket *so, const struct sockaddr *nam __unused, 1526 struct thread *td __unused) 1527 { 1528 sosetstate(so, SS_ISCONNECTED); /* XXX */ 1529 return 0; 1530 } 1531 1532 static void 1533 udp_connect(netmsg_t msg) 1534 { 1535 struct socket *so = msg->connect.base.nm_so; 1536 struct sockaddr *nam = msg->connect.nm_nam; 1537 struct thread *td = msg->connect.nm_td; 1538 struct inpcb *inp; 1539 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 1540 struct sockaddr_in *if_sin; 1541 struct lwkt_port *port; 1542 uint16_t hash; 1543 int error; 1544 1545 KKASSERT(msg->connect.nm_m == NULL); 1546 1547 inp = so->so_pcb; 1548 if (inp == NULL) { 1549 error = EINVAL; 1550 goto out; 1551 } 1552 1553 if (msg->connect.nm_flags & PRUC_RECONNECT) { 1554 msg->connect.nm_flags &= ~PRUC_RECONNECT; 1555 in_pcblink(inp, &udbinfo[mycpuid]); 1556 } 1557 1558 if (inp->inp_faddr.s_addr != INADDR_ANY) { 1559 error = EISCONN; 1560 goto out; 1561 } 1562 error = 0; 1563 1564 /* 1565 * Bind if we have to 1566 */ 1567 if (inp->inp_lport == 0) { 1568 error = in_pcbbind(inp, NULL, td); 1569 if (error) 1570 goto out; 1571 } 1572 1573 /* 1574 * Calculate the correct protocol processing thread. The connect 1575 * operation must run there. 1576 */ 1577 error = in_pcbladdr(inp, nam, &if_sin, td); 1578 if (error) 1579 goto out; 1580 1581 hash = udp_addrhash(sin->sin_addr.s_addr, sin->sin_port, 1582 inp->inp_laddr.s_addr != INADDR_ANY ? 1583 inp->inp_laddr.s_addr : if_sin->sin_addr.s_addr, inp->inp_lport); 1584 port = netisr_hashport(hash); 1585 if (port != &curthread->td_msgport) { 1586 lwkt_msg_t lmsg = &msg->connect.base.lmsg; 1587 int nm_flags = PRUC_RECONNECT; 1588 1589 /* 1590 * in_pcbladdr() may have allocated a route entry for us 1591 * on the current CPU, but we need a route entry on the 1592 * inpcb's owner CPU, so free it here. 1593 */ 1594 in_pcbresetroute(inp); 1595 1596 if (inp->inp_flags & INP_WILDCARD) { 1597 /* 1598 * Remove this inpcb from the wildcard hash before 1599 * the socket's msgport changes. 1600 */ 1601 udp_remwildcardhash(inp); 1602 } 1603 1604 if (so->so_orig_port == NULL) { 1605 /* 1606 * First time change protocol processing port. 1607 * Save the current port for synchronization upon 1608 * udp_detach. 1609 */ 1610 so->so_orig_port = &curthread->td_msgport; 1611 } else { 1612 /* 1613 * We have changed protocol processing port more 1614 * than once. We could not do direct detach 1615 * anymore, because we lose the track of the 1616 * original protocol processing ports to perform 1617 * synchronization upon udp_detach. This should 1618 * be rare though. 1619 */ 1620 inp->inp_flags &= ~INP_DIRECT_DETACH; 1621 } 1622 1623 /* 1624 * We are moving the protocol processing port the socket 1625 * is on, we have to unlink here and re-link on the 1626 * target cpu. 1627 */ 1628 in_pcbunlink(inp, &udbinfo[mycpuid]); 1629 msg->connect.nm_flags |= nm_flags; 1630 1631 /* See the related comment in tcp_usrreq.c tcp_connect() */ 1632 lwkt_setmsg_receipt(lmsg, udp_sosetport); 1633 lwkt_forwardmsg(port, lmsg); 1634 /* msg invalid now */ 1635 return; 1636 } 1637 error = udp_connect_oncpu(inp, sin, if_sin, hash); 1638 out: 1639 if (msg->connect.nm_flags & PRUC_HELDTD) 1640 lwkt_rele(td); 1641 if (error && (msg->connect.nm_flags & PRUC_ASYNC)) { 1642 if (inp->inp_lport == 0) { 1643 /* 1644 * As long as we have the local port, it is fine 1645 * for connect to fail, e.g. disconnect. 1646 */ 1647 so->so_error = error; 1648 } 1649 soclrstate(so, SS_ISCONNECTED); 1650 /* 1651 * Wake up callers blocked on this socket to make sure 1652 * that they can see this error. 1653 * 1654 * NOTE: 1655 * sodisconnected() can't be used here, which bricks 1656 * sending and receiving. 1657 */ 1658 wakeup(&so->so_timeo); 1659 sowwakeup(so); 1660 sorwakeup(so); 1661 } 1662 if (error && inp != NULL && inp->inp_lport != 0 && 1663 (inp->inp_flags & INP_WILDCARD) == 0) { 1664 boolean_t forwarded; 1665 1666 /* Connect failed; put it to wildcard hash. */ 1667 forwarded = udp_inswildcardhash(inp, &msg->connect.base, 1668 error); 1669 if (forwarded) { 1670 /* 1671 * The message is further forwarded, so we are done 1672 * here. 1673 */ 1674 return; 1675 } 1676 } 1677 lwkt_replymsg(&msg->connect.base.lmsg, error); 1678 } 1679 1680 static void 1681 udp_remwildcardhash(struct inpcb *inp) 1682 { 1683 int cpu; 1684 1685 KASSERT(inp->inp_pcbinfo == &udbinfo[mycpuid], 1686 ("not on owner cpu")); 1687 1688 for (cpu = 0; cpu < netisr_ncpus; ++cpu) { 1689 if (cpu == mycpuid) { 1690 /* 1691 * This inpcb will be removed by the later 1692 * in_pcbremwildcardhash(). 1693 */ 1694 continue; 1695 } 1696 in_pcbremwildcardhash_oncpu(inp, &udbinfo[cpu]); 1697 } 1698 in_pcbremwildcardhash(inp); 1699 } 1700 1701 static int 1702 udp_connect_oncpu(struct inpcb *inp, struct sockaddr_in *sin, 1703 struct sockaddr_in *if_sin, uint16_t hash) 1704 { 1705 struct socket *so = inp->inp_socket; 1706 struct inpcb *oinp; 1707 1708 oinp = in_pcblookup_hash(inp->inp_pcbinfo, 1709 sin->sin_addr, sin->sin_port, 1710 inp->inp_laddr.s_addr != INADDR_ANY ? 1711 inp->inp_laddr : if_sin->sin_addr, inp->inp_lport, FALSE, NULL); 1712 if (oinp != NULL) 1713 return EADDRINUSE; 1714 1715 /* 1716 * No more errors can occur, finish adjusting the socket 1717 * and change the processing port to reflect the connected 1718 * socket. Once set we can no longer safely mess with the 1719 * socket. 1720 */ 1721 1722 if (inp->inp_flags & INP_WILDCARD) 1723 udp_remwildcardhash(inp); 1724 1725 if (inp->inp_laddr.s_addr == INADDR_ANY) 1726 inp->inp_laddr = if_sin->sin_addr; 1727 inp->inp_faddr = sin->sin_addr; 1728 inp->inp_fport = sin->sin_port; 1729 in_pcbinsconnhash(inp); 1730 1731 inp->inp_flags |= INP_HASH; 1732 inp->inp_hashval = hash; 1733 1734 soisconnected(so); 1735 1736 return 0; 1737 } 1738 1739 static void 1740 udp_detach2(struct socket *so) 1741 { 1742 in_pcbdetach(so->so_pcb); 1743 sodiscard(so); 1744 sofree(so); 1745 } 1746 1747 static void 1748 udp_detach_final_dispatch(netmsg_t msg) 1749 { 1750 udp_detach2(msg->base.nm_so); 1751 } 1752 1753 static void 1754 udp_detach_oncpu_dispatch(netmsg_t msg) 1755 { 1756 struct netmsg_base *clomsg = &msg->base; 1757 struct socket *so = clomsg->nm_so; 1758 struct inpcb *inp = so->so_pcb; 1759 struct thread *td = curthread; 1760 int nextcpu, cpuid = mycpuid; 1761 1762 KASSERT(td->td_type == TD_TYPE_NETISR, ("not in netisr")); 1763 1764 if (inp->inp_flags & INP_WILDCARD) { 1765 /* 1766 * This inp will be removed on the inp's 1767 * owner CPU later, so don't do it now. 1768 */ 1769 if (&td->td_msgport != so->so_port) 1770 in_pcbremwildcardhash_oncpu(inp, &udbinfo[cpuid]); 1771 } 1772 1773 if (cpuid == 0) { 1774 /* 1775 * Free and clear multicast socket option, 1776 * which is only accessed in netisr0. 1777 */ 1778 ip_freemoptions(inp->inp_moptions); 1779 inp->inp_moptions = NULL; 1780 } 1781 1782 nextcpu = cpuid + 1; 1783 if (nextcpu < netisr_ncpus) { 1784 lwkt_forwardmsg(netisr_cpuport(nextcpu), &clomsg->lmsg); 1785 } else { 1786 /* 1787 * No one could see this inpcb now; destroy this 1788 * inpcb in its owner netisr. 1789 */ 1790 netmsg_init(clomsg, so, &netisr_apanic_rport, 0, 1791 udp_detach_final_dispatch); 1792 lwkt_sendmsg(so->so_port, &clomsg->lmsg); 1793 } 1794 } 1795 1796 static void 1797 udp_detach_syncorig_dispatch(netmsg_t msg) 1798 { 1799 struct netmsg_base *clomsg = &msg->base; 1800 struct socket *so = clomsg->nm_so; 1801 1802 /* 1803 * Original protocol processing port is synchronized; 1804 * destroy this inpcb in its owner netisr. 1805 */ 1806 netmsg_init(clomsg, so, &netisr_apanic_rport, 0, 1807 udp_detach_final_dispatch); 1808 lwkt_sendmsg(so->so_port, &clomsg->lmsg); 1809 } 1810 1811 static void 1812 udp_detach(netmsg_t msg) 1813 { 1814 struct socket *so = msg->detach.base.nm_so; 1815 struct netmsg_base *clomsg; 1816 struct inpcb *inp; 1817 1818 inp = so->so_pcb; 1819 if (inp == NULL) { 1820 lwkt_replymsg(&msg->detach.base.lmsg, EINVAL); 1821 return; 1822 } 1823 1824 /* 1825 * Reply EJUSTRETURN ASAP, we will call sodiscard() and 1826 * sofree() later. 1827 */ 1828 lwkt_replymsg(&msg->detach.base.lmsg, EJUSTRETURN); 1829 1830 if (netisr_ncpus == 1) { 1831 /* Only one CPU, detach the inpcb directly. */ 1832 udp_detach2(so); 1833 return; 1834 } 1835 1836 /* 1837 * Remove this inpcb from the inpcb list first, so that 1838 * no one could find this inpcb from the inpcb list. 1839 */ 1840 in_pcbofflist(inp); 1841 1842 /* 1843 * Remove this inpcb from the local port hash directly 1844 * here, so that its bound local port could be recycled 1845 * timely. 1846 */ 1847 in_pcbremporthash(inp); 1848 1849 if (inp->inp_flags & INP_DIRECT_DETACH) { 1850 /* 1851 * Direct detaching is allowed 1852 */ 1853 KASSERT((inp->inp_flags & INP_WILDCARD) == 0, 1854 ("in the wildcardhash")); 1855 KASSERT(inp->inp_moptions == NULL, ("has mcast options")); 1856 if (so->so_orig_port == NULL) { 1857 udp_detach2(so); 1858 } else { 1859 /* 1860 * Protocol processing port changed once, so 1861 * we need to make sure that there are nothing 1862 * left on the original protocol processing 1863 * port before we destroy this socket and inpcb. 1864 * This is more lightweight than going through 1865 * all UDP processing netisrs. 1866 */ 1867 clomsg = &so->so_clomsg; 1868 netmsg_init(clomsg, so, &netisr_apanic_rport, 1869 MSGF_IGNSOPORT, udp_detach_syncorig_dispatch); 1870 lwkt_sendmsg(so->so_orig_port, &clomsg->lmsg); 1871 } 1872 return; 1873 } 1874 1875 /* 1876 * Go through netisrs which process UDP to make sure 1877 * no one could find this inpcb anymore. 1878 */ 1879 clomsg = &so->so_clomsg; 1880 netmsg_init(clomsg, so, &netisr_apanic_rport, MSGF_IGNSOPORT, 1881 udp_detach_oncpu_dispatch); 1882 lwkt_sendmsg(netisr_cpuport(0), &clomsg->lmsg); 1883 } 1884 1885 static void 1886 udp_disconnect(netmsg_t msg) 1887 { 1888 struct socket *so = msg->disconnect.base.nm_so; 1889 struct inpcb *inp; 1890 boolean_t forwarded; 1891 int error = 0; 1892 1893 inp = so->so_pcb; 1894 if (inp == NULL) { 1895 error = EINVAL; 1896 goto out; 1897 } 1898 if (inp->inp_faddr.s_addr == INADDR_ANY) { 1899 error = ENOTCONN; 1900 goto out; 1901 } 1902 1903 soclrstate(so, SS_ISCONNECTED); /* XXX */ 1904 1905 in_pcbdisconnect(inp); 1906 inp->inp_flags &= ~INP_HASH; 1907 1908 /* 1909 * Follow traditional BSD behavior and retain the local port 1910 * binding. But, fix the old misbehavior of overwriting any 1911 * previously bound local address. 1912 */ 1913 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 1914 inp->inp_laddr.s_addr = INADDR_ANY; 1915 1916 if (so->so_state & SS_ISCLOSING) { 1917 /* 1918 * If this socket is being closed, there is no need 1919 * to put this socket back into wildcard hash table. 1920 */ 1921 error = 0; 1922 goto out; 1923 } 1924 1925 forwarded = udp_inswildcardhash(inp, &msg->disconnect.base, 0); 1926 if (forwarded) { 1927 /* 1928 * The message is further forwarded, so we are done 1929 * here. 1930 */ 1931 return; 1932 } 1933 out: 1934 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 1935 } 1936 1937 void 1938 udp_shutdown(netmsg_t msg) 1939 { 1940 struct socket *so = msg->shutdown.base.nm_so; 1941 struct inpcb *inp; 1942 int error; 1943 1944 inp = so->so_pcb; 1945 if (inp) { 1946 socantsendmore(so); 1947 error = 0; 1948 } else { 1949 error = EINVAL; 1950 } 1951 lwkt_replymsg(&msg->shutdown.base.lmsg, error); 1952 } 1953 1954 struct pr_usrreqs udp_usrreqs = { 1955 .pru_abort = udp_abort, 1956 .pru_accept = pr_generic_notsupp, 1957 .pru_attach = udp_attach, 1958 .pru_bind = udp_bind, 1959 .pru_connect = udp_connect, 1960 .pru_connect2 = pr_generic_notsupp, 1961 .pru_control = in_control_dispatch, 1962 .pru_detach = udp_detach, 1963 .pru_disconnect = udp_disconnect, 1964 .pru_listen = pr_generic_notsupp, 1965 .pru_peeraddr = in_setpeeraddr_dispatch, 1966 .pru_rcvd = pr_generic_notsupp, 1967 .pru_rcvoob = pr_generic_notsupp, 1968 .pru_send = udp_send, 1969 .pru_sense = pru_sense_null, 1970 .pru_shutdown = udp_shutdown, 1971 .pru_sockaddr = in_setsockaddr_dispatch, 1972 .pru_sosend = sosendudp, 1973 .pru_soreceive = soreceive, 1974 .pru_preconnect = udp_preconnect, 1975 .pru_preattach = udp_preattach 1976 }; 1977