udp_usrreq.c revision 1.51
1 /* $NetBSD: udp_usrreq.c,v 1.51 1999/08/09 10:55:29 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 65 */ 66 67 #include "opt_ipsec.h" 68 69 #include "ipkdb.h" 70 71 /* XXX MAPPED_ADDR_ENABLED should be revisited */ 72 73 #include <sys/param.h> 74 #include <sys/malloc.h> 75 #include <sys/mbuf.h> 76 #ifdef MAPPED_ADDR_ENABLED 77 #include <sys/domain.h> 78 #endif /* MAPPED_ADDR_ENABLED */ 79 #include <sys/protosw.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/errno.h> 83 #include <sys/stat.h> 84 #include <sys/systm.h> 85 #include <sys/proc.h> 86 87 #include <vm/vm.h> 88 #include <sys/sysctl.h> 89 90 #include <net/if.h> 91 #include <net/route.h> 92 93 #include <netinet/in.h> 94 #include <netinet/in_systm.h> 95 #include <netinet/in_var.h> 96 #include <netinet/ip.h> 97 #include <netinet/in_pcb.h> 98 #include <netinet/ip_var.h> 99 #include <netinet/ip_icmp.h> 100 #include <netinet/udp.h> 101 #include <netinet/udp_var.h> 102 103 #include <machine/stdarg.h> 104 105 #ifdef IPSEC 106 #include <netinet6/ipsec.h> 107 #include <netkey/key.h> 108 #include <netkey/key_debug.h> 109 #endif /*IPSEC*/ 110 111 /* 112 * UDP protocol implementation. 113 * Per RFC 768, August, 1980. 114 */ 115 #ifndef COMPAT_42 116 int udpcksum = 1; 117 #else 118 int udpcksum = 0; /* XXX */ 119 #endif 120 121 static void udp_notify __P((struct inpcb *, int)); 122 123 #ifndef UDBHASHSIZE 124 #define UDBHASHSIZE 128 125 #endif 126 int udbhashsize = UDBHASHSIZE; 127 128 void 129 udp_init() 130 { 131 132 in_pcbinit(&udbtable, udbhashsize, udbhashsize); 133 } 134 135 void 136 #if __STDC__ 137 udp_input(struct mbuf *m, ...) 138 #else 139 udp_input(m, va_alist) 140 struct mbuf *m; 141 va_dcl 142 #endif 143 { 144 int proto; 145 register struct ip *ip; 146 register struct udphdr *uh; 147 register struct inpcb *inp; 148 struct mbuf *opts = 0; 149 int len; 150 struct ip save_ip; 151 int iphlen; 152 va_list ap; 153 struct sockaddr_in udpsrc; 154 #ifdef MAPPED_ADDR_ENABLED 155 struct sockaddr_in6 mapped; 156 #endif 157 struct sockaddr *sa; 158 159 va_start(ap, m); 160 iphlen = va_arg(ap, int); 161 proto = va_arg(ap, int); 162 va_end(ap); 163 164 udpstat.udps_ipackets++; 165 166 /* 167 * Strip IP options, if any; should skip this, 168 * make available to user, and use on returned packets, 169 * but we don't yet have a way to check the checksum 170 * with options still present. 171 */ 172 if (iphlen > sizeof (struct ip)) { 173 ip_stripoptions(m, (struct mbuf *)0); 174 iphlen = sizeof(struct ip); 175 } 176 177 /* 178 * Get IP and UDP header together in first mbuf. 179 */ 180 ip = mtod(m, struct ip *); 181 if (m->m_len < iphlen + sizeof(struct udphdr)) { 182 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 183 udpstat.udps_hdrops++; 184 return; 185 } 186 ip = mtod(m, struct ip *); 187 } 188 uh = (struct udphdr *)((caddr_t)ip + iphlen); 189 190 /* 191 * Make mbuf data length reflect UDP length. 192 * If not enough data to reflect UDP length, drop. 193 */ 194 len = ntohs((u_int16_t)uh->uh_ulen); 195 if (ip->ip_len != iphlen + len) { 196 if (ip->ip_len < iphlen + len) { 197 udpstat.udps_badlen++; 198 goto bad; 199 } 200 m_adj(m, iphlen + len - ip->ip_len); 201 } 202 /* 203 * Save a copy of the IP header in case we want restore it 204 * for sending an ICMP error message in response. 205 */ 206 save_ip = *ip; 207 208 /* 209 * Checksum extended UDP header and data. 210 */ 211 if (uh->uh_sum) { 212 bzero(((struct ipovly *)ip)->ih_x1, 213 sizeof ((struct ipovly *)ip)->ih_x1); 214 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 215 if (in_cksum(m, len + sizeof (struct ip)) != 0) { 216 udpstat.udps_badsum++; 217 m_freem(m); 218 return; 219 } 220 } 221 222 /* 223 * Construct sockaddr format source address. 224 */ 225 udpsrc.sin_family = AF_INET; 226 udpsrc.sin_len = sizeof(struct sockaddr_in); 227 udpsrc.sin_addr = ip->ip_src; 228 udpsrc.sin_port = uh->uh_sport; 229 bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); 230 231 if (IN_MULTICAST(ip->ip_dst.s_addr) || 232 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 233 struct inpcb *last; 234 /* 235 * Deliver a multicast or broadcast datagram to *all* sockets 236 * for which the local and remote addresses and ports match 237 * those of the incoming datagram. This allows more than 238 * one process to receive multi/broadcasts on the same port. 239 * (This really ought to be done for unicast datagrams as 240 * well, but that would cause problems with existing 241 * applications that open both address-specific sockets and 242 * a wildcard socket listening to the same port -- they would 243 * end up receiving duplicates of every unicast datagram. 244 * Those applications open the multiple sockets to overcome an 245 * inadequacy of the UDP socket interface, but for backwards 246 * compatibility we avoid the problem here rather than 247 * fixing the interface. Maybe 4.5BSD will remedy this?) 248 */ 249 250 iphlen += sizeof(struct udphdr); 251 /* 252 * KAME note: usually we drop udpiphdr from mbuf here. 253 * we need udpiphdr for iPsec processing so we do that later. 254 */ 255 /* 256 * Locate pcb(s) for datagram. 257 * (Algorithm copied from raw_intr().) 258 */ 259 last = NULL; 260 for (inp = udbtable.inpt_queue.cqh_first; 261 inp != (struct inpcb *)&udbtable.inpt_queue; 262 inp = inp->inp_queue.cqe_next) { 263 if (inp->inp_lport != uh->uh_dport) 264 continue; 265 if (!in_nullhost(inp->inp_laddr)) { 266 if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) 267 continue; 268 } 269 if (!in_nullhost(inp->inp_faddr)) { 270 if (!in_hosteq(inp->inp_faddr, ip->ip_src) || 271 inp->inp_fport != uh->uh_sport) 272 continue; 273 } 274 275 if (last != NULL) { 276 struct mbuf *n; 277 278 #ifdef IPSEC 279 /* check AH/ESP integrity. */ 280 if (last != NULL && ipsec4_in_reject(m, last)) { 281 ipsecstat.in_polvio++; 282 /* do not inject data to pcb */ 283 } else 284 #endif /*IPSEC*/ 285 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 286 if (last->inp_flags & INP_CONTROLOPTS 287 || last->inp_socket->so_options & 288 SO_TIMESTAMP) { 289 ip_savecontrol(last, &opts, 290 ip, n); 291 } 292 m_adj(n, iphlen); 293 sa = (struct sockaddr *)&udpsrc; 294 #ifdef MAPPED_ADDR_ENABLED 295 if (last->inp_socket->so_proto-> 296 pr_domain->dom_family == AF_INET6) { 297 in6_sin_2_v4mapsin6(&udpsrc, 298 &mapped); 299 sa = (struct sockaddr *)&mapped; 300 } 301 #endif /* MAPPED_ADDR_ENABLED */ 302 if (sbappendaddr( 303 &last->inp_socket->so_rcv, 304 sa, n, opts) == 0) { 305 m_freem(n); 306 if (opts) 307 m_freem(opts); 308 } else 309 sorwakeup(last->inp_socket); 310 opts = 0; 311 } 312 } 313 last = inp; 314 /* 315 * Don't look for additional matches if this one does 316 * not have either the SO_REUSEPORT or SO_REUSEADDR 317 * socket options set. This heuristic avoids searching 318 * through all pcbs in the common case of a non-shared 319 * port. It * assumes that an application will never 320 * clear these options after setting them. 321 */ 322 if ((last->inp_socket->so_options & 323 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 324 break; 325 } 326 327 if (last == NULL) { 328 /* 329 * No matching pcb found; discard datagram. 330 * (No need to send an ICMP Port Unreachable 331 * for a broadcast or multicast datgram.) 332 */ 333 udpstat.udps_noport++; 334 udpstat.udps_noportbcast++; 335 goto bad; 336 } 337 #ifdef IPSEC 338 /* check AH/ESP integrity. */ 339 if (last != NULL && ipsec4_in_reject(m, last)) { 340 ipsecstat.in_polvio++; 341 goto bad; 342 } 343 #endif /*IPSEC*/ 344 if (last->inp_flags & INP_CONTROLOPTS || 345 last->inp_socket->so_options & SO_TIMESTAMP) 346 ip_savecontrol(last, &opts, ip, m); 347 m->m_len -= iphlen; 348 m->m_pkthdr.len -= iphlen; 349 m->m_data += iphlen; 350 sa = (struct sockaddr *)&udpsrc; 351 #ifdef MAPPED_ADDR_ENABLED 352 if (last->inp_socket->so_proto->pr_domain->dom_family == 353 AF_INET6) { 354 in6_sin_2_v4mapsin6(&udpsrc, &mapped); 355 sa = (struct sockaddr *)&mapped; 356 } 357 #endif /* MAPPED_ADDR_ENABLED */ 358 if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { 359 udpstat.udps_fullsock++; 360 goto bad; 361 } 362 sorwakeup(last->inp_socket); 363 return; 364 } 365 /* 366 * Locate pcb for datagram. 367 */ 368 inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, 369 ip->ip_dst, uh->uh_dport); 370 if (inp == 0) { 371 ++udpstat.udps_pcbhashmiss; 372 inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); 373 if (inp == 0) { 374 udpstat.udps_noport++; 375 if (m->m_flags & (M_BCAST | M_MCAST)) { 376 udpstat.udps_noportbcast++; 377 goto bad; 378 } 379 *ip = save_ip; 380 #if NIPKDB > 0 381 if (checkipkdb(&ip->ip_src, 382 uh->uh_sport, 383 uh->uh_dport, 384 m, 385 iphlen + sizeof(struct udphdr), 386 len - sizeof(struct udphdr))) 387 /* It was a debugger connect packet, just drop it now */ 388 goto bad; 389 #endif 390 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 391 return; 392 } 393 } 394 #ifdef IPSEC 395 if (inp != NULL && ipsec4_in_reject(m, inp)) { 396 ipsecstat.in_polvio++; 397 goto bad; 398 } 399 #endif /*IPSEC*/ 400 401 /* 402 * Stuff source address and datagram in user buffer. 403 */ 404 if (inp->inp_flags & INP_CONTROLOPTS || 405 inp->inp_socket->so_options & SO_TIMESTAMP) 406 ip_savecontrol(inp, &opts, ip, m); 407 iphlen += sizeof(struct udphdr); 408 m->m_len -= iphlen; 409 m->m_pkthdr.len -= iphlen; 410 m->m_data += iphlen; 411 sa = (struct sockaddr *)&udpsrc; 412 #ifdef MAPPED_ADDR_ENABLED 413 if (inp->inp_socket->so_proto->pr_domain->dom_family == AF_INET6) { 414 in6_sin_2_v4mapsin6(&udpsrc, &mapped); 415 sa = (struct sockaddr *)&mapped; 416 } 417 #endif /* MAPPED_ADDR_ENABLED */ 418 if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { 419 udpstat.udps_fullsock++; 420 goto bad; 421 } 422 sorwakeup(inp->inp_socket); 423 return; 424 bad: 425 m_freem(m); 426 if (opts) 427 m_freem(opts); 428 } 429 430 /* 431 * Notify a udp user of an asynchronous error; 432 * just wake up so that he can collect error status. 433 */ 434 static void 435 udp_notify(inp, errno) 436 register struct inpcb *inp; 437 int errno; 438 { 439 440 inp->inp_socket->so_error = errno; 441 sorwakeup(inp->inp_socket); 442 sowwakeup(inp->inp_socket); 443 } 444 445 void * 446 udp_ctlinput(cmd, sa, v) 447 int cmd; 448 struct sockaddr *sa; 449 void *v; 450 { 451 register struct ip *ip = v; 452 register struct udphdr *uh; 453 extern int inetctlerrmap[]; 454 void (*notify) __P((struct inpcb *, int)) = udp_notify; 455 int errno; 456 457 if (sa->sa_family != AF_INET || 458 sa->sa_len != sizeof(struct sockaddr_in)) 459 return NULL; 460 if ((unsigned)cmd >= PRC_NCMDS) 461 return NULL; 462 errno = inetctlerrmap[cmd]; 463 if (PRC_IS_REDIRECT(cmd)) 464 notify = in_rtchange, ip = 0; 465 else if (cmd == PRC_HOSTDEAD) 466 ip = 0; 467 else if (errno == 0) 468 return NULL; 469 if (ip) { 470 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 471 in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, 472 ip->ip_src, uh->uh_sport, errno, notify); 473 } else 474 in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, 475 notify); 476 return NULL; 477 } 478 479 int 480 #if __STDC__ 481 udp_output(struct mbuf *m, ...) 482 #else 483 udp_output(m, va_alist) 484 struct mbuf *m; 485 va_dcl 486 #endif 487 { 488 register struct inpcb *inp; 489 register struct udpiphdr *ui; 490 register int len = m->m_pkthdr.len; 491 int error = 0; 492 va_list ap; 493 494 va_start(ap, m); 495 inp = va_arg(ap, struct inpcb *); 496 va_end(ap); 497 498 /* 499 * Calculate data length and get a mbuf 500 * for UDP and IP headers. 501 */ 502 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 503 if (m == 0) { 504 error = ENOBUFS; 505 goto release; 506 } 507 508 /* 509 * Compute the packet length of the IP header, and 510 * punt if the length looks bogus. 511 */ 512 if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { 513 error = EMSGSIZE; 514 goto release; 515 } 516 517 /* 518 * Fill in mbuf with extended UDP header 519 * and addresses and length put into network format. 520 */ 521 ui = mtod(m, struct udpiphdr *); 522 bzero(ui->ui_x1, sizeof ui->ui_x1); 523 ui->ui_pr = IPPROTO_UDP; 524 ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr)); 525 ui->ui_src = inp->inp_laddr; 526 ui->ui_dst = inp->inp_faddr; 527 ui->ui_sport = inp->inp_lport; 528 ui->ui_dport = inp->inp_fport; 529 ui->ui_ulen = ui->ui_len; 530 531 /* 532 * Stuff checksum and output datagram. 533 */ 534 ui->ui_sum = 0; 535 if (udpcksum) { 536 if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) 537 ui->ui_sum = 0xffff; 538 } 539 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; 540 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 541 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 542 udpstat.udps_opackets++; 543 544 #ifdef IPSEC 545 m->m_pkthdr.rcvif = (struct ifnet *)inp->inp_socket; 546 #endif /*IPSEC*/ 547 548 return (ip_output(m, inp->inp_options, &inp->inp_route, 549 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 550 inp->inp_moptions)); 551 552 release: 553 m_freem(m); 554 return (error); 555 } 556 557 int udp_sendspace = 9216; /* really max datagram size */ 558 int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 559 /* 40 1K datagrams */ 560 561 /*ARGSUSED*/ 562 int 563 udp_usrreq(so, req, m, nam, control, p) 564 struct socket *so; 565 int req; 566 struct mbuf *m, *nam, *control; 567 struct proc *p; 568 { 569 register struct inpcb *inp; 570 int s; 571 register int error = 0; 572 573 if (req == PRU_CONTROL) 574 return (in_control(so, (long)m, (caddr_t)nam, 575 (struct ifnet *)control, p)); 576 577 s = splsoftnet(); 578 inp = sotoinpcb(so); 579 #ifdef DIAGNOSTIC 580 if (req != PRU_SEND && req != PRU_SENDOOB && control) 581 panic("udp_usrreq: unexpected control mbuf"); 582 #endif 583 if (inp == 0 && req != PRU_ATTACH) { 584 error = EINVAL; 585 goto release; 586 } 587 588 /* 589 * Note: need to block udp_input while changing 590 * the udp pcb queue and/or pcb addresses. 591 */ 592 switch (req) { 593 594 case PRU_ATTACH: 595 if (inp != 0) { 596 error = EISCONN; 597 break; 598 } 599 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 600 error = soreserve(so, udp_sendspace, udp_recvspace); 601 if (error) 602 break; 603 } 604 error = in_pcballoc(so, &udbtable); 605 if (error) 606 break; 607 inp = sotoinpcb(so); 608 inp->inp_ip.ip_ttl = ip_defttl; 609 #ifdef IPSEC 610 inp = (struct inpcb *)so->so_pcb; 611 error = ipsec_init_policy(&inp->inp_sp); 612 #endif /*IPSEC*/ 613 break; 614 615 case PRU_DETACH: 616 in_pcbdetach(inp); 617 break; 618 619 case PRU_BIND: 620 error = in_pcbbind(inp, nam, p); 621 break; 622 623 case PRU_LISTEN: 624 error = EOPNOTSUPP; 625 break; 626 627 case PRU_CONNECT: 628 error = in_pcbconnect(inp, nam); 629 if (error) 630 break; 631 soisconnected(so); 632 break; 633 634 case PRU_CONNECT2: 635 error = EOPNOTSUPP; 636 break; 637 638 case PRU_DISCONNECT: 639 /*soisdisconnected(so);*/ 640 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 641 in_pcbdisconnect(inp); 642 inp->inp_laddr = zeroin_addr; /* XXX */ 643 in_pcbstate(inp, INP_BOUND); /* XXX */ 644 break; 645 646 case PRU_SHUTDOWN: 647 socantsendmore(so); 648 break; 649 650 case PRU_RCVD: 651 error = EOPNOTSUPP; 652 break; 653 654 case PRU_SEND: 655 if (control && control->m_len) { 656 m_freem(control); 657 m_freem(m); 658 error = EINVAL; 659 break; 660 } 661 { 662 struct in_addr laddr; /* XXX */ 663 664 if (nam) { 665 laddr = inp->inp_laddr; /* XXX */ 666 if ((so->so_state & SS_ISCONNECTED) != 0) { 667 error = EISCONN; 668 goto die; 669 } 670 error = in_pcbconnect(inp, nam); 671 if (error) { 672 die: 673 m_freem(m); 674 break; 675 } 676 } else { 677 if ((so->so_state & SS_ISCONNECTED) == 0) { 678 error = ENOTCONN; 679 goto die; 680 } 681 } 682 error = udp_output(m, inp); 683 if (nam) { 684 in_pcbdisconnect(inp); 685 inp->inp_laddr = laddr; /* XXX */ 686 in_pcbstate(inp, INP_BOUND); /* XXX */ 687 } 688 } 689 break; 690 691 case PRU_SENSE: 692 /* 693 * stat: don't bother with a blocksize. 694 */ 695 splx(s); 696 return (0); 697 698 case PRU_RCVOOB: 699 error = EOPNOTSUPP; 700 break; 701 702 case PRU_SENDOOB: 703 m_freem(control); 704 m_freem(m); 705 error = EOPNOTSUPP; 706 break; 707 708 case PRU_SOCKADDR: 709 in_setsockaddr(inp, nam); 710 break; 711 712 case PRU_PEERADDR: 713 in_setpeeraddr(inp, nam); 714 break; 715 716 default: 717 panic("udp_usrreq"); 718 } 719 720 release: 721 splx(s); 722 return (error); 723 } 724 725 /* 726 * Sysctl for udp variables. 727 */ 728 int 729 udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 730 int *name; 731 u_int namelen; 732 void *oldp; 733 size_t *oldlenp; 734 void *newp; 735 size_t newlen; 736 { 737 /* All sysctl names at this level are terminal. */ 738 if (namelen != 1) 739 return (ENOTDIR); 740 741 switch (name[0]) { 742 case UDPCTL_CHECKSUM: 743 return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum)); 744 case UDPCTL_SENDSPACE: 745 return (sysctl_int(oldp, oldlenp, newp, newlen, 746 &udp_sendspace)); 747 case UDPCTL_RECVSPACE: 748 return (sysctl_int(oldp, oldlenp, newp, newlen, 749 &udp_recvspace)); 750 default: 751 return (ENOPROTOOPT); 752 } 753 /* NOTREACHED */ 754 } 755
Indexes created Sat Sep 20 22:09:52 GMT 2025