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