tcp_usrreq.c revision 1.189
1 /* $NetBSD: tcp_usrreq.c,v 1.189 2014/07/23 13:17:18 rtr 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) 1997, 1998, 2005, 2006 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to The NetBSD Foundation 37 * by Jason R. Thorpe and Kevin M. Lahey of the Numerical Aerospace Simulation 38 * Facility, NASA Ames Research Center. 39 * This code is derived from software contributed to The NetBSD Foundation 40 * by Charles M. Hannum. 41 * This code is derived from software contributed to The NetBSD Foundation 42 * by Rui Paulo. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 54 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 55 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 56 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 57 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 58 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 59 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 60 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 61 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 62 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 63 * POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 /* 67 * Copyright (c) 1982, 1986, 1988, 1993, 1995 68 * The Regents of the University of California. All rights reserved. 69 * 70 * Redistribution and use in source and binary forms, with or without 71 * modification, are permitted provided that the following conditions 72 * are met: 73 * 1. Redistributions of source code must retain the above copyright 74 * notice, this list of conditions and the following disclaimer. 75 * 2. Redistributions in binary form must reproduce the above copyright 76 * notice, this list of conditions and the following disclaimer in the 77 * documentation and/or other materials provided with the distribution. 78 * 3. Neither the name of the University nor the names of its contributors 79 * may be used to endorse or promote products derived from this software 80 * without specific prior written permission. 81 * 82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 92 * SUCH DAMAGE. 93 * 94 * @(#)tcp_usrreq.c 8.5 (Berkeley) 6/21/95 95 */ 96 97 /* 98 * TCP protocol interface to socket abstraction. 99 */ 100 101 #include <sys/cdefs.h> 102 __KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.189 2014/07/23 13:17:18 rtr Exp $"); 103 104 #include "opt_inet.h" 105 #include "opt_ipsec.h" 106 #include "opt_tcp_debug.h" 107 #include "opt_mbuftrace.h" 108 109 #include <sys/param.h> 110 #include <sys/systm.h> 111 #include <sys/kernel.h> 112 #include <sys/malloc.h> 113 #include <sys/mbuf.h> 114 #include <sys/socket.h> 115 #include <sys/socketvar.h> 116 #include <sys/protosw.h> 117 #include <sys/errno.h> 118 #include <sys/stat.h> 119 #include <sys/proc.h> 120 #include <sys/domain.h> 121 #include <sys/sysctl.h> 122 #include <sys/kauth.h> 123 #include <sys/uidinfo.h> 124 125 #include <net/if.h> 126 #include <net/route.h> 127 128 #include <netinet/in.h> 129 #include <netinet/in_systm.h> 130 #include <netinet/in_var.h> 131 #include <netinet/ip.h> 132 #include <netinet/in_pcb.h> 133 #include <netinet/ip_var.h> 134 #include <netinet/in_offload.h> 135 136 #ifdef INET6 137 #ifndef INET 138 #include <netinet/in.h> 139 #endif 140 #include <netinet/ip6.h> 141 #include <netinet6/in6_pcb.h> 142 #include <netinet6/ip6_var.h> 143 #include <netinet6/scope6_var.h> 144 #endif 145 146 #include <netinet/tcp.h> 147 #include <netinet/tcp_fsm.h> 148 #include <netinet/tcp_seq.h> 149 #include <netinet/tcp_timer.h> 150 #include <netinet/tcp_var.h> 151 #include <netinet/tcp_private.h> 152 #include <netinet/tcp_congctl.h> 153 #include <netinet/tcpip.h> 154 #include <netinet/tcp_debug.h> 155 #include <netinet/tcp_vtw.h> 156 157 #include "opt_tcp_space.h" 158 159 static int 160 tcp_debug_capture(struct tcpcb *tp, int req) 161 { 162 #ifdef KPROF 163 tcp_acounts[tp->t_state][req]++; 164 #endif 165 #ifdef TCP_DEBUG 166 return tp->t_state; 167 #endif 168 return 0; 169 } 170 171 static inline void 172 tcp_debug_trace(struct socket *so, struct tcpcb *tp, int ostate, int req) 173 { 174 #ifdef TCP_DEBUG 175 if (tp && (so->so_options & SO_DEBUG)) 176 tcp_trace(TA_USER, ostate, tp, NULL, req); 177 #endif 178 } 179 180 /* 181 * Process a TCP user request for TCP tb. If this is a send request 182 * then m is the mbuf chain of send data. If this is a timer expiration 183 * (called from the software clock routine), then timertype tells which timer. 184 */ 185 static int 186 tcp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 187 struct mbuf *control, struct lwp *l) 188 { 189 struct inpcb *inp; 190 #ifdef INET6 191 struct in6pcb *in6p; 192 #endif 193 struct tcpcb *tp = NULL; 194 int s; 195 int error = 0; 196 int ostate = 0; 197 int family; /* family of the socket */ 198 199 KASSERT(req != PRU_ATTACH); 200 KASSERT(req != PRU_DETACH); 201 KASSERT(req != PRU_ACCEPT); 202 KASSERT(req != PRU_CONTROL); 203 KASSERT(req != PRU_SENSE); 204 KASSERT(req != PRU_PEERADDR); 205 KASSERT(req != PRU_SOCKADDR); 206 KASSERT(req != PRU_RCVOOB); 207 KASSERT(req != PRU_SENDOOB); 208 209 family = so->so_proto->pr_domain->dom_family; 210 211 s = splsoftnet(); 212 213 if (req == PRU_PURGEIF) { 214 mutex_enter(softnet_lock); 215 switch (family) { 216 #ifdef INET 217 case PF_INET: 218 in_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 219 in_purgeif((struct ifnet *)control); 220 in_pcbpurgeif(&tcbtable, (struct ifnet *)control); 221 break; 222 #endif 223 #ifdef INET6 224 case PF_INET6: 225 in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 226 in6_purgeif((struct ifnet *)control); 227 in6_pcbpurgeif(&tcbtable, (struct ifnet *)control); 228 break; 229 #endif 230 default: 231 mutex_exit(softnet_lock); 232 splx(s); 233 return (EAFNOSUPPORT); 234 } 235 mutex_exit(softnet_lock); 236 splx(s); 237 return (0); 238 } 239 240 KASSERT(solocked(so)); 241 242 switch (family) { 243 #ifdef INET 244 case PF_INET: 245 inp = sotoinpcb(so); 246 #ifdef INET6 247 in6p = NULL; 248 #endif 249 break; 250 #endif 251 #ifdef INET6 252 case PF_INET6: 253 inp = NULL; 254 in6p = sotoin6pcb(so); 255 break; 256 #endif 257 default: 258 splx(s); 259 return EAFNOSUPPORT; 260 } 261 KASSERT(!control || req == PRU_SEND); 262 #ifdef INET6 263 /* XXX: KASSERT((inp != NULL) ^ (in6p != NULL)); */ 264 #endif 265 /* 266 * When a TCP is attached to a socket, then there will be 267 * a (struct inpcb) pointed at by the socket, and this 268 * structure will point at a subsidary (struct tcpcb). 269 */ 270 if (inp == NULL 271 #ifdef INET6 272 && in6p == NULL 273 #endif 274 ) 275 { 276 error = EINVAL; 277 goto release; 278 } 279 #ifdef INET 280 if (inp) { 281 tp = intotcpcb(inp); 282 /* WHAT IF TP IS 0? */ 283 ostate = tcp_debug_capture(tp, req); 284 } 285 #endif 286 #ifdef INET6 287 if (in6p) { 288 tp = in6totcpcb(in6p); 289 /* WHAT IF TP IS 0? */ 290 ostate = tcp_debug_capture(tp, req); 291 } 292 #endif 293 294 switch (req) { 295 296 /* 297 * Give the socket an address. 298 */ 299 case PRU_BIND: 300 switch (family) { 301 #ifdef INET 302 case PF_INET: 303 error = in_pcbbind(inp, nam, l); 304 break; 305 #endif 306 #ifdef INET6 307 case PF_INET6: 308 error = in6_pcbbind(in6p, nam, l); 309 if (!error) { 310 /* mapped addr case */ 311 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 312 tp->t_family = AF_INET; 313 else 314 tp->t_family = AF_INET6; 315 } 316 break; 317 #endif 318 } 319 break; 320 321 /* 322 * Prepare to accept connections. 323 */ 324 case PRU_LISTEN: 325 #ifdef INET 326 if (inp && inp->inp_lport == 0) { 327 error = in_pcbbind(inp, NULL, l); 328 if (error) 329 break; 330 } 331 #endif 332 #ifdef INET6 333 if (in6p && in6p->in6p_lport == 0) { 334 error = in6_pcbbind(in6p, NULL, l); 335 if (error) 336 break; 337 } 338 #endif 339 tp->t_state = TCPS_LISTEN; 340 break; 341 342 /* 343 * Initiate connection to peer. 344 * Create a template for use in transmissions on this connection. 345 * Enter SYN_SENT state, and mark socket as connecting. 346 * Start keep-alive timer, and seed output sequence space. 347 * Send initial segment on connection. 348 */ 349 case PRU_CONNECT: 350 #ifdef INET 351 if (inp) { 352 if (inp->inp_lport == 0) { 353 error = in_pcbbind(inp, NULL, l); 354 if (error) 355 break; 356 } 357 error = in_pcbconnect(inp, nam, l); 358 } 359 #endif 360 #ifdef INET6 361 if (in6p) { 362 if (in6p->in6p_lport == 0) { 363 error = in6_pcbbind(in6p, NULL, l); 364 if (error) 365 break; 366 } 367 error = in6_pcbconnect(in6p, nam, l); 368 if (!error) { 369 /* mapped addr case */ 370 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) 371 tp->t_family = AF_INET; 372 else 373 tp->t_family = AF_INET6; 374 } 375 } 376 #endif 377 if (error) 378 break; 379 tp->t_template = tcp_template(tp); 380 if (tp->t_template == 0) { 381 #ifdef INET 382 if (inp) 383 in_pcbdisconnect(inp); 384 #endif 385 #ifdef INET6 386 if (in6p) 387 in6_pcbdisconnect(in6p); 388 #endif 389 error = ENOBUFS; 390 break; 391 } 392 /* 393 * Compute window scaling to request. 394 * XXX: This should be moved to tcp_output(). 395 */ 396 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 397 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 398 tp->request_r_scale++; 399 soisconnecting(so); 400 TCP_STATINC(TCP_STAT_CONNATTEMPT); 401 tp->t_state = TCPS_SYN_SENT; 402 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 403 tp->iss = tcp_new_iss(tp, 0); 404 tcp_sendseqinit(tp); 405 error = tcp_output(tp); 406 break; 407 408 /* 409 * Create a TCP connection between two sockets. 410 */ 411 case PRU_CONNECT2: 412 error = EOPNOTSUPP; 413 break; 414 415 /* 416 * Initiate disconnect from peer. 417 * If connection never passed embryonic stage, just drop; 418 * else if don't need to let data drain, then can just drop anyways, 419 * else have to begin TCP shutdown process: mark socket disconnecting, 420 * drain unread data, state switch to reflect user close, and 421 * send segment (e.g. FIN) to peer. Socket will be really disconnected 422 * when peer sends FIN and acks ours. 423 * 424 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 425 */ 426 case PRU_DISCONNECT: 427 tp = tcp_disconnect(tp); 428 break; 429 430 /* 431 * Mark the connection as being incapable of further output. 432 */ 433 case PRU_SHUTDOWN: 434 socantsendmore(so); 435 tp = tcp_usrclosed(tp); 436 if (tp) 437 error = tcp_output(tp); 438 break; 439 440 /* 441 * After a receive, possibly send window update to peer. 442 */ 443 case PRU_RCVD: 444 /* 445 * soreceive() calls this function when a user receives 446 * ancillary data on a listening socket. We don't call 447 * tcp_output in such a case, since there is no header 448 * template for a listening socket and hence the kernel 449 * will panic. 450 */ 451 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 452 (void) tcp_output(tp); 453 break; 454 455 /* 456 * Do a send by putting data in output queue and updating urgent 457 * marker if URG set. Possibly send more data. 458 */ 459 case PRU_SEND: 460 if (control && control->m_len) { 461 m_freem(control); 462 m_freem(m); 463 error = EINVAL; 464 break; 465 } 466 sbappendstream(&so->so_snd, m); 467 error = tcp_output(tp); 468 break; 469 470 /* 471 * Abort the TCP. 472 */ 473 case PRU_ABORT: 474 tp = tcp_drop(tp, ECONNABORTED); 475 break; 476 477 default: 478 panic("tcp_usrreq"); 479 } 480 481 tcp_debug_trace(so, tp, ostate, req); 482 483 release: 484 splx(s); 485 return (error); 486 } 487 488 static void 489 change_keepalive(struct socket *so, struct tcpcb *tp) 490 { 491 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 492 TCP_TIMER_DISARM(tp, TCPT_KEEP); 493 TCP_TIMER_DISARM(tp, TCPT_2MSL); 494 495 if (tp->t_state == TCPS_SYN_RECEIVED || 496 tp->t_state == TCPS_SYN_SENT) { 497 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 498 } else if (so->so_options & SO_KEEPALIVE && 499 tp->t_state <= TCPS_CLOSE_WAIT) { 500 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 501 } else { 502 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 503 } 504 505 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 506 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 507 } 508 509 510 int 511 tcp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 512 { 513 int error = 0, s; 514 struct inpcb *inp; 515 #ifdef INET6 516 struct in6pcb *in6p; 517 #endif 518 struct tcpcb *tp; 519 u_int ui; 520 int family; /* family of the socket */ 521 int level, optname, optval; 522 523 level = sopt->sopt_level; 524 optname = sopt->sopt_name; 525 526 family = so->so_proto->pr_domain->dom_family; 527 528 s = splsoftnet(); 529 switch (family) { 530 #ifdef INET 531 case PF_INET: 532 inp = sotoinpcb(so); 533 #ifdef INET6 534 in6p = NULL; 535 #endif 536 break; 537 #endif 538 #ifdef INET6 539 case PF_INET6: 540 inp = NULL; 541 in6p = sotoin6pcb(so); 542 break; 543 #endif 544 default: 545 splx(s); 546 panic("%s: af %d", __func__, family); 547 } 548 #ifndef INET6 549 if (inp == NULL) 550 #else 551 if (inp == NULL && in6p == NULL) 552 #endif 553 { 554 splx(s); 555 return (ECONNRESET); 556 } 557 if (level != IPPROTO_TCP) { 558 switch (family) { 559 #ifdef INET 560 case PF_INET: 561 error = ip_ctloutput(op, so, sopt); 562 break; 563 #endif 564 #ifdef INET6 565 case PF_INET6: 566 error = ip6_ctloutput(op, so, sopt); 567 break; 568 #endif 569 } 570 splx(s); 571 return (error); 572 } 573 if (inp) 574 tp = intotcpcb(inp); 575 #ifdef INET6 576 else if (in6p) 577 tp = in6totcpcb(in6p); 578 #endif 579 else 580 tp = NULL; 581 582 switch (op) { 583 case PRCO_SETOPT: 584 switch (optname) { 585 #ifdef TCP_SIGNATURE 586 case TCP_MD5SIG: 587 error = sockopt_getint(sopt, &optval); 588 if (error) 589 break; 590 if (optval > 0) 591 tp->t_flags |= TF_SIGNATURE; 592 else 593 tp->t_flags &= ~TF_SIGNATURE; 594 break; 595 #endif /* TCP_SIGNATURE */ 596 597 case TCP_NODELAY: 598 error = sockopt_getint(sopt, &optval); 599 if (error) 600 break; 601 if (optval) 602 tp->t_flags |= TF_NODELAY; 603 else 604 tp->t_flags &= ~TF_NODELAY; 605 break; 606 607 case TCP_MAXSEG: 608 error = sockopt_getint(sopt, &optval); 609 if (error) 610 break; 611 if (optval > 0 && optval <= tp->t_peermss) 612 tp->t_peermss = optval; /* limit on send size */ 613 else 614 error = EINVAL; 615 break; 616 #ifdef notyet 617 case TCP_CONGCTL: 618 /* XXX string overflow XXX */ 619 error = tcp_congctl_select(tp, sopt->sopt_data); 620 break; 621 #endif 622 623 case TCP_KEEPIDLE: 624 error = sockopt_get(sopt, &ui, sizeof(ui)); 625 if (error) 626 break; 627 if (ui > 0) { 628 tp->t_keepidle = ui; 629 change_keepalive(so, tp); 630 } else 631 error = EINVAL; 632 break; 633 634 case TCP_KEEPINTVL: 635 error = sockopt_get(sopt, &ui, sizeof(ui)); 636 if (error) 637 break; 638 if (ui > 0) { 639 tp->t_keepintvl = ui; 640 change_keepalive(so, tp); 641 } else 642 error = EINVAL; 643 break; 644 645 case TCP_KEEPCNT: 646 error = sockopt_get(sopt, &ui, sizeof(ui)); 647 if (error) 648 break; 649 if (ui > 0) { 650 tp->t_keepcnt = ui; 651 change_keepalive(so, tp); 652 } else 653 error = EINVAL; 654 break; 655 656 case TCP_KEEPINIT: 657 error = sockopt_get(sopt, &ui, sizeof(ui)); 658 if (error) 659 break; 660 if (ui > 0) { 661 tp->t_keepinit = ui; 662 change_keepalive(so, tp); 663 } else 664 error = EINVAL; 665 break; 666 667 default: 668 error = ENOPROTOOPT; 669 break; 670 } 671 break; 672 673 case PRCO_GETOPT: 674 switch (optname) { 675 #ifdef TCP_SIGNATURE 676 case TCP_MD5SIG: 677 optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 678 error = sockopt_set(sopt, &optval, sizeof(optval)); 679 break; 680 #endif 681 case TCP_NODELAY: 682 optval = tp->t_flags & TF_NODELAY; 683 error = sockopt_set(sopt, &optval, sizeof(optval)); 684 break; 685 case TCP_MAXSEG: 686 optval = tp->t_peermss; 687 error = sockopt_set(sopt, &optval, sizeof(optval)); 688 break; 689 #ifdef notyet 690 case TCP_CONGCTL: 691 break; 692 #endif 693 default: 694 error = ENOPROTOOPT; 695 break; 696 } 697 break; 698 } 699 splx(s); 700 return (error); 701 } 702 703 #ifndef TCP_SENDSPACE 704 #define TCP_SENDSPACE 1024*32 705 #endif 706 int tcp_sendspace = TCP_SENDSPACE; 707 #ifndef TCP_RECVSPACE 708 #define TCP_RECVSPACE 1024*32 709 #endif 710 int tcp_recvspace = TCP_RECVSPACE; 711 712 /* 713 * tcp_attach: attach TCP protocol to socket, allocating internet protocol 714 * control block, TCP control block, buffer space and entering LISTEN state 715 * if to accept connections. 716 */ 717 static int 718 tcp_attach(struct socket *so, int proto) 719 { 720 struct tcpcb *tp; 721 struct inpcb *inp; 722 #ifdef INET6 723 struct in6pcb *in6p; 724 #endif 725 int s, error, family; 726 727 /* Assign the lock (must happen even if we will error out). */ 728 s = splsoftnet(); 729 sosetlock(so); 730 KASSERT(solocked(so)); 731 732 family = so->so_proto->pr_domain->dom_family; 733 switch (family) { 734 #ifdef INET 735 case PF_INET: 736 inp = sotoinpcb(so); 737 #ifdef INET6 738 in6p = NULL; 739 #endif 740 break; 741 #endif 742 #ifdef INET6 743 case PF_INET6: 744 inp = NULL; 745 in6p = sotoin6pcb(so); 746 break; 747 #endif 748 default: 749 error = EAFNOSUPPORT; 750 goto out; 751 } 752 753 KASSERT(inp == NULL); 754 #ifdef INET6 755 KASSERT(in6p == NULL); 756 #endif 757 758 #ifdef MBUFTRACE 759 so->so_mowner = &tcp_sock_mowner; 760 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 761 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 762 #endif 763 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 764 error = soreserve(so, tcp_sendspace, tcp_recvspace); 765 if (error) 766 goto out; 767 } 768 769 so->so_rcv.sb_flags |= SB_AUTOSIZE; 770 so->so_snd.sb_flags |= SB_AUTOSIZE; 771 772 switch (family) { 773 #ifdef INET 774 case PF_INET: 775 error = in_pcballoc(so, &tcbtable); 776 if (error) 777 goto out; 778 inp = sotoinpcb(so); 779 #ifdef INET6 780 in6p = NULL; 781 #endif 782 break; 783 #endif 784 #ifdef INET6 785 case PF_INET6: 786 error = in6_pcballoc(so, &tcbtable); 787 if (error) 788 goto out; 789 inp = NULL; 790 in6p = sotoin6pcb(so); 791 break; 792 #endif 793 default: 794 error = EAFNOSUPPORT; 795 goto out; 796 } 797 if (inp) 798 tp = tcp_newtcpcb(family, (void *)inp); 799 #ifdef INET6 800 else if (in6p) 801 tp = tcp_newtcpcb(family, (void *)in6p); 802 #endif 803 else 804 tp = NULL; 805 806 if (tp == NULL) { 807 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 808 809 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 810 #ifdef INET 811 if (inp) 812 in_pcbdetach(inp); 813 #endif 814 #ifdef INET6 815 if (in6p) 816 in6_pcbdetach(in6p); 817 #endif 818 so->so_state |= nofd; 819 error = ENOBUFS; 820 goto out; 821 } 822 tp->t_state = TCPS_CLOSED; 823 if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 824 so->so_linger = TCP_LINGERTIME; 825 } 826 out: 827 KASSERT(solocked(so)); 828 splx(s); 829 return error; 830 } 831 832 static void 833 tcp_detach(struct socket *so) 834 { 835 struct inpcb *inp; 836 #ifdef INET6 837 struct in6pcb *in6p; 838 #endif 839 struct tcpcb *tp = NULL; 840 int s, family; 841 842 KASSERT(solocked(so)); 843 844 s = splsoftnet(); 845 family = so->so_proto->pr_domain->dom_family; 846 switch (family) { 847 #ifdef INET 848 case PF_INET: 849 inp = sotoinpcb(so); 850 tp = intotcpcb(inp); 851 break; 852 #endif 853 #ifdef INET6 854 case PF_INET6: 855 in6p = sotoin6pcb(so); 856 tp = in6totcpcb(in6p); 857 break; 858 #endif 859 default: 860 splx(s); 861 return; 862 } 863 KASSERT(tp != NULL); 864 (void)tcp_disconnect(tp); 865 splx(s); 866 } 867 868 static int 869 tcp_accept(struct socket *so, struct mbuf *nam) 870 { 871 struct inpcb *inp = NULL; 872 #ifdef INET6 873 struct in6pcb *in6p = NULL; 874 #endif 875 struct tcpcb *tp = NULL; 876 int ostate = 0; 877 878 KASSERT(solocked(so)); 879 880 switch (so->so_proto->pr_domain->dom_family) { 881 #ifdef INET 882 case PF_INET: 883 inp = sotoinpcb(so); 884 break; 885 #endif 886 #ifdef INET6 887 case PF_INET6: 888 in6p = sotoin6pcb(so); 889 break; 890 #endif 891 default: 892 return EAFNOSUPPORT; 893 } 894 895 /* 896 * When a TCP is attached to a socket, then there will be 897 * a (struct inpcb) pointed at by the socket, and this 898 * structure will point at a subsidary (struct tcpcb). 899 */ 900 if (inp == NULL 901 #ifdef INET6 902 && in6p == NULL 903 #endif 904 ) 905 { 906 return EINVAL; 907 } 908 909 /* 910 * Accept a connection. Essentially all the work is 911 * done at higher levels; just return the address 912 * of the peer, storing through addr. 913 */ 914 #ifdef INET 915 if (inp) { 916 tp = intotcpcb(inp); 917 KASSERT(tp != NULL); 918 ostate = tcp_debug_capture(tp, PRU_ACCEPT); 919 in_setpeeraddr(inp, nam); 920 } 921 #endif 922 #ifdef INET6 923 if (in6p) { 924 tp = in6totcpcb(in6p); 925 KASSERT(tp != NULL); 926 ostate = tcp_debug_capture(tp, PRU_ACCEPT); 927 in6_setpeeraddr(in6p, nam); 928 } 929 #endif 930 tcp_debug_trace(so, tp, ostate, PRU_ACCEPT); 931 return 0; 932 } 933 934 static int 935 tcp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 936 { 937 switch (so->so_proto->pr_domain->dom_family) { 938 #ifdef INET 939 case PF_INET: 940 return in_control(so, cmd, nam, ifp); 941 #endif 942 #ifdef INET6 943 case PF_INET6: 944 return in6_control(so, cmd, nam, ifp); 945 #endif 946 default: 947 return EAFNOSUPPORT; 948 } 949 } 950 951 static int 952 tcp_stat(struct socket *so, struct stat *ub) 953 { 954 KASSERT(solocked(so)); 955 956 /* stat: don't bother with a blocksize. */ 957 return 0; 958 } 959 960 static int 961 tcp_peeraddr(struct socket *so, struct mbuf *nam) 962 { 963 struct inpcb *inp = NULL; 964 #ifdef INET6 965 struct in6pcb *in6p = NULL; 966 #endif 967 struct tcpcb *tp = NULL; 968 int ostate = 0; 969 970 switch (so->so_proto->pr_domain->dom_family) { 971 #ifdef INET 972 case PF_INET: 973 inp = sotoinpcb(so); 974 break; 975 #endif 976 #ifdef INET6 977 case PF_INET6: 978 in6p = sotoin6pcb(so); 979 break; 980 #endif 981 default: 982 return EAFNOSUPPORT; 983 } 984 985 if (inp == NULL 986 #ifdef INET6 987 && in6p == NULL 988 #endif 989 ) 990 return EINVAL; 991 992 #ifdef INET 993 if (inp) { 994 tp = intotcpcb(inp); 995 ostate = tcp_debug_capture(tp, PRU_PEERADDR); 996 in_setpeeraddr(inp, nam); 997 } 998 #endif 999 #ifdef INET6 1000 if (in6p) { 1001 tp = in6totcpcb(in6p); 1002 ostate = tcp_debug_capture(tp, PRU_PEERADDR); 1003 in6_setpeeraddr(in6p, nam); 1004 } 1005 #endif 1006 1007 tcp_debug_trace(so, tp, ostate, PRU_PEERADDR); 1008 1009 return 0; 1010 } 1011 1012 static int 1013 tcp_sockaddr(struct socket *so, struct mbuf *nam) 1014 { 1015 struct inpcb *inp = NULL; 1016 #ifdef INET6 1017 struct in6pcb *in6p = NULL; 1018 #endif 1019 struct tcpcb *tp = NULL; 1020 int ostate = 0; 1021 1022 switch (so->so_proto->pr_domain->dom_family) { 1023 #ifdef INET 1024 case PF_INET: 1025 inp = sotoinpcb(so); 1026 break; 1027 #endif 1028 #ifdef INET6 1029 case PF_INET6: 1030 in6p = sotoin6pcb(so); 1031 break; 1032 #endif 1033 default: 1034 return EAFNOSUPPORT; 1035 } 1036 1037 if (inp == NULL 1038 #ifdef INET6 1039 && in6p == NULL 1040 #endif 1041 ) 1042 return EINVAL; 1043 1044 #ifdef INET 1045 if (inp) { 1046 tp = intotcpcb(inp); 1047 ostate = tcp_debug_capture(tp, PRU_SOCKADDR); 1048 in_setsockaddr(inp, nam); 1049 } 1050 #endif 1051 #ifdef INET6 1052 if (in6p) { 1053 tp = in6totcpcb(in6p); 1054 ostate = tcp_debug_capture(tp, PRU_SOCKADDR); 1055 in6_setsockaddr(in6p, nam); 1056 } 1057 #endif 1058 1059 tcp_debug_trace(so, tp, ostate, PRU_SOCKADDR); 1060 1061 return 0; 1062 } 1063 1064 static int 1065 tcp_recvoob(struct socket *so, struct mbuf *m, int flags) 1066 { 1067 struct inpcb *inp = NULL; 1068 #ifdef INET6 1069 struct in6pcb *in6p = NULL; 1070 #endif 1071 struct tcpcb *tp = NULL; 1072 int ostate = 0; 1073 1074 switch (so->so_proto->pr_domain->dom_family) { 1075 #ifdef INET 1076 case PF_INET: 1077 inp = sotoinpcb(so); 1078 break; 1079 #endif 1080 #ifdef INET6 1081 case PF_INET6: 1082 in6p = sotoin6pcb(so); 1083 break; 1084 #endif 1085 default: 1086 return EAFNOSUPPORT; 1087 } 1088 1089 if (inp == NULL 1090 #ifdef INET6 1091 && in6p == NULL 1092 #endif 1093 ) 1094 return EINVAL; 1095 1096 #ifdef INET 1097 if (inp) { 1098 tp = intotcpcb(inp); 1099 ostate = tcp_debug_capture(tp, PRU_RCVOOB); 1100 } 1101 #endif 1102 #ifdef INET6 1103 if (in6p) { 1104 tp = in6totcpcb(in6p); 1105 ostate = tcp_debug_capture(tp, PRU_RCVOOB); 1106 } 1107 #endif 1108 1109 if ((so->so_oobmark == 0 && 1110 (so->so_state & SS_RCVATMARK) == 0) || 1111 so->so_options & SO_OOBINLINE || 1112 tp->t_oobflags & TCPOOB_HADDATA) 1113 return EINVAL; 1114 1115 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) 1116 return EWOULDBLOCK; 1117 1118 m->m_len = 1; 1119 *mtod(m, char *) = tp->t_iobc; 1120 if ((flags & MSG_PEEK) == 0) 1121 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1122 1123 tcp_debug_trace(so, tp, ostate, PRU_RCVOOB); 1124 1125 return 0; 1126 } 1127 1128 static int 1129 tcp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 1130 { 1131 struct inpcb *inp = NULL; 1132 #ifdef INET6 1133 struct in6pcb *in6p = NULL; 1134 #endif 1135 struct tcpcb *tp = NULL; 1136 int ostate = 0; 1137 int error = 0; 1138 1139 switch (so->so_proto->pr_domain->dom_family) { 1140 #ifdef INET 1141 case PF_INET: 1142 inp = sotoinpcb(so); 1143 break; 1144 #endif 1145 #ifdef INET6 1146 case PF_INET6: 1147 in6p = sotoin6pcb(so); 1148 break; 1149 #endif 1150 default: 1151 return EAFNOSUPPORT; 1152 } 1153 1154 if (inp == NULL 1155 #ifdef INET6 1156 && in6p == NULL 1157 #endif 1158 ) 1159 return EINVAL; 1160 1161 #ifdef INET 1162 if (inp) { 1163 tp = intotcpcb(inp); 1164 ostate = tcp_debug_capture(tp, PRU_SENDOOB); 1165 } 1166 #endif 1167 #ifdef INET6 1168 if (in6p) { 1169 tp = in6totcpcb(in6p); 1170 ostate = tcp_debug_capture(tp, PRU_SENDOOB); 1171 } 1172 #endif 1173 1174 if (sbspace(&so->so_snd) < -512) { 1175 m_freem(m); 1176 return ENOBUFS; 1177 } 1178 /* 1179 * According to RFC961 (Assigned Protocols), 1180 * the urgent pointer points to the last octet 1181 * of urgent data. We continue, however, 1182 * to consider it to indicate the first octet 1183 * of data past the urgent section. 1184 * Otherwise, snd_up should be one lower. 1185 */ 1186 sbappendstream(&so->so_snd, m); 1187 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 1188 tp->t_force = 1; 1189 error = tcp_output(tp); 1190 tp->t_force = 0; 1191 1192 tcp_debug_trace(so, tp, ostate, PRU_SENDOOB); 1193 1194 return error; 1195 } 1196 1197 /* 1198 * Initiate (or continue) disconnect. 1199 * If embryonic state, just send reset (once). 1200 * If in ``let data drain'' option and linger null, just drop. 1201 * Otherwise (hard), mark socket disconnecting and drop 1202 * current input data; switch states based on user close, and 1203 * send segment to peer (with FIN). 1204 */ 1205 struct tcpcb * 1206 tcp_disconnect(struct tcpcb *tp) 1207 { 1208 struct socket *so; 1209 1210 if (tp->t_inpcb) 1211 so = tp->t_inpcb->inp_socket; 1212 #ifdef INET6 1213 else if (tp->t_in6pcb) 1214 so = tp->t_in6pcb->in6p_socket; 1215 #endif 1216 else 1217 so = NULL; 1218 1219 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 1220 tp = tcp_close(tp); 1221 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 1222 tp = tcp_drop(tp, 0); 1223 else { 1224 soisdisconnecting(so); 1225 sbflush(&so->so_rcv); 1226 tp = tcp_usrclosed(tp); 1227 if (tp) 1228 (void) tcp_output(tp); 1229 } 1230 return (tp); 1231 } 1232 1233 /* 1234 * User issued close, and wish to trail through shutdown states: 1235 * if never received SYN, just forget it. If got a SYN from peer, 1236 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 1237 * If already got a FIN from peer, then almost done; go to LAST_ACK 1238 * state. In all other cases, have already sent FIN to peer (e.g. 1239 * after PRU_SHUTDOWN), and just have to play tedious game waiting 1240 * for peer to send FIN or not respond to keep-alives, etc. 1241 * We can let the user exit from the close as soon as the FIN is acked. 1242 */ 1243 struct tcpcb * 1244 tcp_usrclosed(struct tcpcb *tp) 1245 { 1246 1247 switch (tp->t_state) { 1248 1249 case TCPS_CLOSED: 1250 case TCPS_LISTEN: 1251 case TCPS_SYN_SENT: 1252 tp->t_state = TCPS_CLOSED; 1253 tp = tcp_close(tp); 1254 break; 1255 1256 case TCPS_SYN_RECEIVED: 1257 case TCPS_ESTABLISHED: 1258 tp->t_state = TCPS_FIN_WAIT_1; 1259 break; 1260 1261 case TCPS_CLOSE_WAIT: 1262 tp->t_state = TCPS_LAST_ACK; 1263 break; 1264 } 1265 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 1266 struct socket *so; 1267 if (tp->t_inpcb) 1268 so = tp->t_inpcb->inp_socket; 1269 #ifdef INET6 1270 else if (tp->t_in6pcb) 1271 so = tp->t_in6pcb->in6p_socket; 1272 #endif 1273 else 1274 so = NULL; 1275 if (so) 1276 soisdisconnected(so); 1277 /* 1278 * If we are in FIN_WAIT_2, we arrived here because the 1279 * application did a shutdown of the send side. Like the 1280 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1281 * a full close, we start a timer to make sure sockets are 1282 * not left in FIN_WAIT_2 forever. 1283 */ 1284 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1285 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1286 else if (tp->t_state == TCPS_TIME_WAIT 1287 && ((tp->t_inpcb 1288 && (tcp4_vtw_enable & 1) 1289 && vtw_add(AF_INET, tp)) 1290 || 1291 (tp->t_in6pcb 1292 && (tcp6_vtw_enable & 1) 1293 && vtw_add(AF_INET6, tp)))) { 1294 tp = 0; 1295 } 1296 } 1297 return (tp); 1298 } 1299 1300 /* 1301 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1302 * than 32. 1303 */ 1304 static int 1305 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1306 { 1307 int error, mssdflt; 1308 struct sysctlnode node; 1309 1310 mssdflt = tcp_mssdflt; 1311 node = *rnode; 1312 node.sysctl_data = &mssdflt; 1313 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1314 if (error || newp == NULL) 1315 return (error); 1316 1317 if (mssdflt < 32) 1318 return (EINVAL); 1319 tcp_mssdflt = mssdflt; 1320 1321 mutex_enter(softnet_lock); 1322 tcp_tcpcb_template(); 1323 mutex_exit(softnet_lock); 1324 1325 return (0); 1326 } 1327 1328 /* 1329 * sysctl helper for TCP CB template update 1330 */ 1331 static int 1332 sysctl_update_tcpcb_template(SYSCTLFN_ARGS) 1333 { 1334 int t, error; 1335 struct sysctlnode node; 1336 1337 /* follow procedures in sysctl(9) manpage */ 1338 t = *(int *)rnode->sysctl_data; 1339 node = *rnode; 1340 node.sysctl_data = &t; 1341 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1342 if (error || newp == NULL) 1343 return error; 1344 1345 if (t < 0) 1346 return EINVAL; 1347 1348 *(int *)rnode->sysctl_data = t; 1349 1350 mutex_enter(softnet_lock); 1351 tcp_tcpcb_template(); 1352 mutex_exit(softnet_lock); 1353 1354 return 0; 1355 } 1356 1357 /* 1358 * sysctl helper routine for setting port related values under 1359 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1360 * additional checks for each type. this code has placed in 1361 * tcp_input.c since INET and INET6 both use the same tcp code. 1362 * 1363 * this helper is not static so that both inet and inet6 can use it. 1364 */ 1365 int 1366 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1367 { 1368 int error, tmp; 1369 int apmin, apmax; 1370 #ifndef IPNOPRIVPORTS 1371 int lpmin, lpmax; 1372 #endif /* IPNOPRIVPORTS */ 1373 struct sysctlnode node; 1374 1375 if (namelen != 0) 1376 return (EINVAL); 1377 1378 switch (name[-3]) { 1379 #ifdef INET 1380 case PF_INET: 1381 apmin = anonportmin; 1382 apmax = anonportmax; 1383 #ifndef IPNOPRIVPORTS 1384 lpmin = lowportmin; 1385 lpmax = lowportmax; 1386 #endif /* IPNOPRIVPORTS */ 1387 break; 1388 #endif /* INET */ 1389 #ifdef INET6 1390 case PF_INET6: 1391 apmin = ip6_anonportmin; 1392 apmax = ip6_anonportmax; 1393 #ifndef IPNOPRIVPORTS 1394 lpmin = ip6_lowportmin; 1395 lpmax = ip6_lowportmax; 1396 #endif /* IPNOPRIVPORTS */ 1397 break; 1398 #endif /* INET6 */ 1399 default: 1400 return (EINVAL); 1401 } 1402 1403 /* 1404 * insert temporary copy into node, perform lookup on 1405 * temporary, then restore pointer 1406 */ 1407 node = *rnode; 1408 tmp = *(int*)rnode->sysctl_data; 1409 node.sysctl_data = &tmp; 1410 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1411 if (error || newp == NULL) 1412 return (error); 1413 1414 /* 1415 * simple port range check 1416 */ 1417 if (tmp < 0 || tmp > 65535) 1418 return (EINVAL); 1419 1420 /* 1421 * per-node range checks 1422 */ 1423 switch (rnode->sysctl_num) { 1424 case IPCTL_ANONPORTMIN: 1425 case IPV6CTL_ANONPORTMIN: 1426 if (tmp >= apmax) 1427 return (EINVAL); 1428 #ifndef IPNOPRIVPORTS 1429 if (tmp < IPPORT_RESERVED) 1430 return (EINVAL); 1431 #endif /* IPNOPRIVPORTS */ 1432 break; 1433 1434 case IPCTL_ANONPORTMAX: 1435 case IPV6CTL_ANONPORTMAX: 1436 if (apmin >= tmp) 1437 return (EINVAL); 1438 #ifndef IPNOPRIVPORTS 1439 if (tmp < IPPORT_RESERVED) 1440 return (EINVAL); 1441 #endif /* IPNOPRIVPORTS */ 1442 break; 1443 1444 #ifndef IPNOPRIVPORTS 1445 case IPCTL_LOWPORTMIN: 1446 case IPV6CTL_LOWPORTMIN: 1447 if (tmp >= lpmax || 1448 tmp > IPPORT_RESERVEDMAX || 1449 tmp < IPPORT_RESERVEDMIN) 1450 return (EINVAL); 1451 break; 1452 1453 case IPCTL_LOWPORTMAX: 1454 case IPV6CTL_LOWPORTMAX: 1455 if (lpmin >= tmp || 1456 tmp > IPPORT_RESERVEDMAX || 1457 tmp < IPPORT_RESERVEDMIN) 1458 return (EINVAL); 1459 break; 1460 #endif /* IPNOPRIVPORTS */ 1461 1462 default: 1463 return (EINVAL); 1464 } 1465 1466 *(int*)rnode->sysctl_data = tmp; 1467 1468 return (0); 1469 } 1470 1471 static inline int 1472 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1473 { 1474 if (oldp) { 1475 size_t sz; 1476 uid_t uid; 1477 int error; 1478 1479 if (sockp->so_cred == NULL) 1480 return EPERM; 1481 1482 uid = kauth_cred_geteuid(sockp->so_cred); 1483 sz = MIN(sizeof(uid), *oldlenp); 1484 if ((error = copyout(&uid, oldp, sz)) != 0) 1485 return error; 1486 } 1487 *oldlenp = sizeof(uid_t); 1488 return 0; 1489 } 1490 1491 static inline int 1492 inet4_ident_core(struct in_addr raddr, u_int rport, 1493 struct in_addr laddr, u_int lport, 1494 void *oldp, size_t *oldlenp, 1495 struct lwp *l, int dodrop) 1496 { 1497 struct inpcb *inp; 1498 struct socket *sockp; 1499 1500 inp = in_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0); 1501 1502 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1503 return ESRCH; 1504 1505 if (dodrop) { 1506 struct tcpcb *tp; 1507 int error; 1508 1509 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1510 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1511 return ESRCH; 1512 1513 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1514 KAUTH_REQ_NETWORK_SOCKET_DROP, inp->inp_socket, tp, NULL); 1515 if (error) 1516 return (error); 1517 1518 (void)tcp_drop(tp, ECONNABORTED); 1519 return 0; 1520 } 1521 else 1522 return copyout_uid(sockp, oldp, oldlenp); 1523 } 1524 1525 #ifdef INET6 1526 static inline int 1527 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1528 struct in6_addr *laddr, u_int lport, 1529 void *oldp, size_t *oldlenp, 1530 struct lwp *l, int dodrop) 1531 { 1532 struct in6pcb *in6p; 1533 struct socket *sockp; 1534 1535 in6p = in6_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0, 0); 1536 1537 if (in6p == NULL || (sockp = in6p->in6p_socket) == NULL) 1538 return ESRCH; 1539 1540 if (dodrop) { 1541 struct tcpcb *tp; 1542 int error; 1543 1544 if (in6p == NULL || (tp = in6totcpcb(in6p)) == NULL || 1545 (in6p->in6p_socket->so_options & SO_ACCEPTCONN) != 0) 1546 return ESRCH; 1547 1548 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1549 KAUTH_REQ_NETWORK_SOCKET_DROP, in6p->in6p_socket, tp, NULL); 1550 if (error) 1551 return (error); 1552 1553 (void)tcp_drop(tp, ECONNABORTED); 1554 return 0; 1555 } 1556 else 1557 return copyout_uid(sockp, oldp, oldlenp); 1558 } 1559 #endif 1560 1561 /* 1562 * sysctl helper routine for the net.inet.tcp.drop and 1563 * net.inet6.tcp6.drop nodes. 1564 */ 1565 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1566 1567 /* 1568 * sysctl helper routine for the net.inet.tcp.ident and 1569 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1570 * old way of looking up the ident information for ipv4 which involves 1571 * stuffing the port/addr pairs into the mib lookup. 1572 */ 1573 static int 1574 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1575 { 1576 #ifdef INET 1577 struct sockaddr_in *si4[2]; 1578 #endif /* INET */ 1579 #ifdef INET6 1580 struct sockaddr_in6 *si6[2]; 1581 #endif /* INET6 */ 1582 struct sockaddr_storage sa[2]; 1583 int error, pf, dodrop; 1584 1585 dodrop = name[-1] == TCPCTL_DROP; 1586 if (dodrop) { 1587 if (oldp != NULL || *oldlenp != 0) 1588 return EINVAL; 1589 if (newp == NULL) 1590 return EPERM; 1591 if (newlen < sizeof(sa)) 1592 return ENOMEM; 1593 } 1594 if (namelen != 4 && namelen != 0) 1595 return EINVAL; 1596 if (name[-2] != IPPROTO_TCP) 1597 return EINVAL; 1598 pf = name[-3]; 1599 1600 /* old style lookup, ipv4 only */ 1601 if (namelen == 4) { 1602 #ifdef INET 1603 struct in_addr laddr, raddr; 1604 u_int lport, rport; 1605 1606 if (pf != PF_INET) 1607 return EPROTONOSUPPORT; 1608 raddr.s_addr = (uint32_t)name[0]; 1609 rport = (u_int)name[1]; 1610 laddr.s_addr = (uint32_t)name[2]; 1611 lport = (u_int)name[3]; 1612 1613 mutex_enter(softnet_lock); 1614 error = inet4_ident_core(raddr, rport, laddr, lport, 1615 oldp, oldlenp, l, dodrop); 1616 mutex_exit(softnet_lock); 1617 return error; 1618 #else /* INET */ 1619 return EINVAL; 1620 #endif /* INET */ 1621 } 1622 1623 if (newp == NULL || newlen != sizeof(sa)) 1624 return EINVAL; 1625 error = copyin(newp, &sa, newlen); 1626 if (error) 1627 return error; 1628 1629 /* 1630 * requested families must match 1631 */ 1632 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1633 return EINVAL; 1634 1635 switch (pf) { 1636 #ifdef INET6 1637 case PF_INET6: 1638 si6[0] = (struct sockaddr_in6*)&sa[0]; 1639 si6[1] = (struct sockaddr_in6*)&sa[1]; 1640 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1641 si6[1]->sin6_len != sizeof(*si6[1])) 1642 return EINVAL; 1643 1644 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1645 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1646 error = sa6_embedscope(si6[0], ip6_use_defzone); 1647 if (error) 1648 return error; 1649 error = sa6_embedscope(si6[1], ip6_use_defzone); 1650 if (error) 1651 return error; 1652 1653 mutex_enter(softnet_lock); 1654 error = inet6_ident_core(&si6[0]->sin6_addr, 1655 si6[0]->sin6_port, &si6[1]->sin6_addr, 1656 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1657 mutex_exit(softnet_lock); 1658 return error; 1659 } 1660 1661 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1662 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1663 return EINVAL; 1664 1665 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1666 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1667 /*FALLTHROUGH*/ 1668 #endif /* INET6 */ 1669 #ifdef INET 1670 case PF_INET: 1671 si4[0] = (struct sockaddr_in*)&sa[0]; 1672 si4[1] = (struct sockaddr_in*)&sa[1]; 1673 if (si4[0]->sin_len != sizeof(*si4[0]) || 1674 si4[0]->sin_len != sizeof(*si4[1])) 1675 return EINVAL; 1676 1677 mutex_enter(softnet_lock); 1678 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1679 si4[1]->sin_addr, si4[1]->sin_port, 1680 oldp, oldlenp, l, dodrop); 1681 mutex_exit(softnet_lock); 1682 return error; 1683 #endif /* INET */ 1684 default: 1685 return EPROTONOSUPPORT; 1686 } 1687 } 1688 1689 /* 1690 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1691 * inet/inet6, as well as raw pcbs for each. specifically not 1692 * declared static so that raw sockets and udp/udp6 can use it as 1693 * well. 1694 */ 1695 int 1696 sysctl_inpcblist(SYSCTLFN_ARGS) 1697 { 1698 #ifdef INET 1699 struct sockaddr_in *in; 1700 const struct inpcb *inp; 1701 #endif 1702 #ifdef INET6 1703 struct sockaddr_in6 *in6; 1704 const struct in6pcb *in6p; 1705 #endif 1706 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1707 const struct inpcb_hdr *inph; 1708 struct tcpcb *tp; 1709 struct kinfo_pcb pcb; 1710 char *dp; 1711 size_t len, needed, elem_size, out_size; 1712 int error, elem_count, pf, proto, pf2; 1713 1714 if (namelen != 4) 1715 return (EINVAL); 1716 1717 if (oldp != NULL) { 1718 len = *oldlenp; 1719 elem_size = name[2]; 1720 elem_count = name[3]; 1721 if (elem_size != sizeof(pcb)) 1722 return EINVAL; 1723 } else { 1724 len = 0; 1725 elem_count = INT_MAX; 1726 elem_size = sizeof(pcb); 1727 } 1728 error = 0; 1729 dp = oldp; 1730 out_size = elem_size; 1731 needed = 0; 1732 1733 if (namelen == 1 && name[0] == CTL_QUERY) 1734 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1735 1736 if (name - oname != 4) 1737 return (EINVAL); 1738 1739 pf = oname[1]; 1740 proto = oname[2]; 1741 pf2 = (oldp != NULL) ? pf : 0; 1742 1743 mutex_enter(softnet_lock); 1744 1745 TAILQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1746 #ifdef INET 1747 inp = (const struct inpcb *)inph; 1748 #endif 1749 #ifdef INET6 1750 in6p = (const struct in6pcb *)inph; 1751 #endif 1752 1753 if (inph->inph_af != pf) 1754 continue; 1755 1756 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1757 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1758 NULL) != 0) 1759 continue; 1760 1761 memset(&pcb, 0, sizeof(pcb)); 1762 1763 pcb.ki_family = pf; 1764 pcb.ki_type = proto; 1765 1766 switch (pf2) { 1767 case 0: 1768 /* just probing for size */ 1769 break; 1770 #ifdef INET 1771 case PF_INET: 1772 pcb.ki_family = inp->inp_socket->so_proto-> 1773 pr_domain->dom_family; 1774 pcb.ki_type = inp->inp_socket->so_proto-> 1775 pr_type; 1776 pcb.ki_protocol = inp->inp_socket->so_proto-> 1777 pr_protocol; 1778 pcb.ki_pflags = inp->inp_flags; 1779 1780 pcb.ki_sostate = inp->inp_socket->so_state; 1781 pcb.ki_prstate = inp->inp_state; 1782 if (proto == IPPROTO_TCP) { 1783 tp = intotcpcb(inp); 1784 pcb.ki_tstate = tp->t_state; 1785 pcb.ki_tflags = tp->t_flags; 1786 } 1787 1788 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1789 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1790 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1791 1792 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1793 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1794 1795 in = satosin(&pcb.ki_src); 1796 in->sin_len = sizeof(*in); 1797 in->sin_family = pf; 1798 in->sin_port = inp->inp_lport; 1799 in->sin_addr = inp->inp_laddr; 1800 if (pcb.ki_prstate >= INP_CONNECTED) { 1801 in = satosin(&pcb.ki_dst); 1802 in->sin_len = sizeof(*in); 1803 in->sin_family = pf; 1804 in->sin_port = inp->inp_fport; 1805 in->sin_addr = inp->inp_faddr; 1806 } 1807 break; 1808 #endif 1809 #ifdef INET6 1810 case PF_INET6: 1811 pcb.ki_family = in6p->in6p_socket->so_proto-> 1812 pr_domain->dom_family; 1813 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1814 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1815 pr_protocol; 1816 pcb.ki_pflags = in6p->in6p_flags; 1817 1818 pcb.ki_sostate = in6p->in6p_socket->so_state; 1819 pcb.ki_prstate = in6p->in6p_state; 1820 if (proto == IPPROTO_TCP) { 1821 tp = in6totcpcb(in6p); 1822 pcb.ki_tstate = tp->t_state; 1823 pcb.ki_tflags = tp->t_flags; 1824 } 1825 1826 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1827 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1828 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1829 1830 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1831 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1832 1833 in6 = satosin6(&pcb.ki_src); 1834 in6->sin6_len = sizeof(*in6); 1835 in6->sin6_family = pf; 1836 in6->sin6_port = in6p->in6p_lport; 1837 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1838 in6->sin6_addr = in6p->in6p_laddr; 1839 in6->sin6_scope_id = 0; /* XXX? */ 1840 1841 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1842 in6 = satosin6(&pcb.ki_dst); 1843 in6->sin6_len = sizeof(*in6); 1844 in6->sin6_family = pf; 1845 in6->sin6_port = in6p->in6p_fport; 1846 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1847 in6->sin6_addr = in6p->in6p_faddr; 1848 in6->sin6_scope_id = 0; /* XXX? */ 1849 } 1850 break; 1851 #endif 1852 } 1853 1854 if (len >= elem_size && elem_count > 0) { 1855 error = copyout(&pcb, dp, out_size); 1856 if (error) { 1857 mutex_exit(softnet_lock); 1858 return (error); 1859 } 1860 dp += elem_size; 1861 len -= elem_size; 1862 } 1863 needed += elem_size; 1864 if (elem_count > 0 && elem_count != INT_MAX) 1865 elem_count--; 1866 } 1867 1868 *oldlenp = needed; 1869 if (oldp == NULL) 1870 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1871 1872 mutex_exit(softnet_lock); 1873 1874 return (error); 1875 } 1876 1877 static int 1878 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1879 { 1880 struct sysctlnode node; 1881 int error; 1882 char newname[TCPCC_MAXLEN]; 1883 1884 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1885 1886 node = *rnode; 1887 node.sysctl_data = newname; 1888 node.sysctl_size = sizeof(newname); 1889 1890 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1891 1892 if (error || 1893 newp == NULL || 1894 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1895 return error; 1896 1897 mutex_enter(softnet_lock); 1898 error = tcp_congctl_select(NULL, newname); 1899 mutex_exit(softnet_lock); 1900 1901 return error; 1902 } 1903 1904 static int 1905 sysctl_tcp_init_win(SYSCTLFN_ARGS) 1906 { 1907 int error; 1908 u_int iw; 1909 struct sysctlnode node; 1910 1911 iw = *(u_int *)rnode->sysctl_data; 1912 node = *rnode; 1913 node.sysctl_data = &iw; 1914 node.sysctl_size = sizeof(iw); 1915 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1916 if (error || newp == NULL) 1917 return error; 1918 1919 if (iw >= __arraycount(tcp_init_win_max)) 1920 return EINVAL; 1921 *(u_int *)rnode->sysctl_data = iw; 1922 return 0; 1923 } 1924 1925 static int 1926 sysctl_tcp_keep(SYSCTLFN_ARGS) 1927 { 1928 int error; 1929 u_int tmp; 1930 struct sysctlnode node; 1931 1932 node = *rnode; 1933 tmp = *(u_int *)rnode->sysctl_data; 1934 node.sysctl_data = &tmp; 1935 1936 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1937 if (error || newp == NULL) 1938 return error; 1939 1940 mutex_enter(softnet_lock); 1941 1942 *(u_int *)rnode->sysctl_data = tmp; 1943 tcp_tcpcb_template(); /* update the template */ 1944 1945 mutex_exit(softnet_lock); 1946 return 0; 1947 } 1948 1949 static int 1950 sysctl_net_inet_tcp_stats(SYSCTLFN_ARGS) 1951 { 1952 1953 return (NETSTAT_SYSCTL(tcpstat_percpu, TCP_NSTATS)); 1954 } 1955 1956 /* 1957 * this (second stage) setup routine is a replacement for tcp_sysctl() 1958 * (which is currently used for ipv4 and ipv6) 1959 */ 1960 static void 1961 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1962 const char *tcpname) 1963 { 1964 const struct sysctlnode *sack_node; 1965 const struct sysctlnode *abc_node; 1966 const struct sysctlnode *ecn_node; 1967 const struct sysctlnode *congctl_node; 1968 const struct sysctlnode *mslt_node; 1969 const struct sysctlnode *vtw_node; 1970 #ifdef TCP_DEBUG 1971 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1972 extern int tcp_debx; 1973 #endif 1974 1975 sysctl_createv(clog, 0, NULL, NULL, 1976 CTLFLAG_PERMANENT, 1977 CTLTYPE_NODE, pfname, NULL, 1978 NULL, 0, NULL, 0, 1979 CTL_NET, pf, CTL_EOL); 1980 sysctl_createv(clog, 0, NULL, NULL, 1981 CTLFLAG_PERMANENT, 1982 CTLTYPE_NODE, tcpname, 1983 SYSCTL_DESCR("TCP related settings"), 1984 NULL, 0, NULL, 0, 1985 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1986 1987 sysctl_createv(clog, 0, NULL, NULL, 1988 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1989 CTLTYPE_INT, "rfc1323", 1990 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1991 sysctl_update_tcpcb_template, 0, &tcp_do_rfc1323, 0, 1992 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1993 sysctl_createv(clog, 0, NULL, NULL, 1994 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1995 CTLTYPE_INT, "sendspace", 1996 SYSCTL_DESCR("Default TCP send buffer size"), 1997 NULL, 0, &tcp_sendspace, 0, 1998 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1999 sysctl_createv(clog, 0, NULL, NULL, 2000 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2001 CTLTYPE_INT, "recvspace", 2002 SYSCTL_DESCR("Default TCP receive buffer size"), 2003 NULL, 0, &tcp_recvspace, 0, 2004 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 2005 sysctl_createv(clog, 0, NULL, NULL, 2006 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2007 CTLTYPE_INT, "mssdflt", 2008 SYSCTL_DESCR("Default maximum segment size"), 2009 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 2010 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 2011 sysctl_createv(clog, 0, NULL, NULL, 2012 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2013 CTLTYPE_INT, "minmss", 2014 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 2015 NULL, 0, &tcp_minmss, 0, 2016 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2017 sysctl_createv(clog, 0, NULL, NULL, 2018 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2019 CTLTYPE_INT, "msl", 2020 SYSCTL_DESCR("Maximum Segment Life"), 2021 NULL, 0, &tcp_msl, 0, 2022 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSL, CTL_EOL); 2023 sysctl_createv(clog, 0, NULL, NULL, 2024 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2025 CTLTYPE_INT, "syn_cache_limit", 2026 SYSCTL_DESCR("Maximum number of entries in the TCP " 2027 "compressed state engine"), 2028 NULL, 0, &tcp_syn_cache_limit, 0, 2029 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 2030 CTL_EOL); 2031 sysctl_createv(clog, 0, NULL, NULL, 2032 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2033 CTLTYPE_INT, "syn_bucket_limit", 2034 SYSCTL_DESCR("Maximum number of entries per hash " 2035 "bucket in the TCP compressed state " 2036 "engine"), 2037 NULL, 0, &tcp_syn_bucket_limit, 0, 2038 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 2039 CTL_EOL); 2040 #if 0 /* obsoleted */ 2041 sysctl_createv(clog, 0, NULL, NULL, 2042 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2043 CTLTYPE_INT, "syn_cache_interval", 2044 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 2045 NULL, 0, &tcp_syn_cache_interval, 0, 2046 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 2047 CTL_EOL); 2048 #endif 2049 sysctl_createv(clog, 0, NULL, NULL, 2050 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2051 CTLTYPE_INT, "init_win", 2052 SYSCTL_DESCR("Initial TCP congestion window"), 2053 sysctl_tcp_init_win, 0, &tcp_init_win, 0, 2054 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 2055 sysctl_createv(clog, 0, NULL, NULL, 2056 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2057 CTLTYPE_INT, "mss_ifmtu", 2058 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 2059 NULL, 0, &tcp_mss_ifmtu, 0, 2060 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 2061 sysctl_createv(clog, 0, NULL, &sack_node, 2062 CTLFLAG_PERMANENT, 2063 CTLTYPE_NODE, "sack", 2064 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 2065 NULL, 0, NULL, 0, 2066 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 2067 2068 /* Congctl subtree */ 2069 sysctl_createv(clog, 0, NULL, &congctl_node, 2070 CTLFLAG_PERMANENT, 2071 CTLTYPE_NODE, "congctl", 2072 SYSCTL_DESCR("TCP Congestion Control"), 2073 NULL, 0, NULL, 0, 2074 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2075 sysctl_createv(clog, 0, &congctl_node, NULL, 2076 CTLFLAG_PERMANENT, 2077 CTLTYPE_STRING, "available", 2078 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 2079 NULL, 0, tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 2080 sysctl_createv(clog, 0, &congctl_node, NULL, 2081 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2082 CTLTYPE_STRING, "selected", 2083 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 2084 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 2085 CTL_CREATE, CTL_EOL); 2086 2087 sysctl_createv(clog, 0, NULL, NULL, 2088 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2089 CTLTYPE_INT, "win_scale", 2090 SYSCTL_DESCR("Use RFC1323 window scale options"), 2091 sysctl_update_tcpcb_template, 0, &tcp_do_win_scale, 0, 2092 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 2093 sysctl_createv(clog, 0, NULL, NULL, 2094 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2095 CTLTYPE_INT, "timestamps", 2096 SYSCTL_DESCR("Use RFC1323 time stamp options"), 2097 sysctl_update_tcpcb_template, 0, &tcp_do_timestamps, 0, 2098 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 2099 sysctl_createv(clog, 0, NULL, NULL, 2100 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2101 CTLTYPE_INT, "compat_42", 2102 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 2103 NULL, 0, &tcp_compat_42, 0, 2104 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 2105 sysctl_createv(clog, 0, NULL, NULL, 2106 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2107 CTLTYPE_INT, "cwm", 2108 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 2109 "Monitoring"), 2110 NULL, 0, &tcp_cwm, 0, 2111 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 2112 sysctl_createv(clog, 0, NULL, NULL, 2113 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2114 CTLTYPE_INT, "cwm_burstsize", 2115 SYSCTL_DESCR("Congestion Window Monitoring allowed " 2116 "burst count in packets"), 2117 NULL, 0, &tcp_cwm_burstsize, 0, 2118 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 2119 CTL_EOL); 2120 sysctl_createv(clog, 0, NULL, NULL, 2121 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2122 CTLTYPE_INT, "ack_on_push", 2123 SYSCTL_DESCR("Immediately return ACK when PSH is " 2124 "received"), 2125 NULL, 0, &tcp_ack_on_push, 0, 2126 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 2127 sysctl_createv(clog, 0, NULL, NULL, 2128 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2129 CTLTYPE_INT, "keepidle", 2130 SYSCTL_DESCR("Allowed connection idle ticks before a " 2131 "keepalive probe is sent"), 2132 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 2133 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 2134 sysctl_createv(clog, 0, NULL, NULL, 2135 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2136 CTLTYPE_INT, "keepintvl", 2137 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 2138 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 2139 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 2140 sysctl_createv(clog, 0, NULL, NULL, 2141 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2142 CTLTYPE_INT, "keepcnt", 2143 SYSCTL_DESCR("Number of keepalive probes to send"), 2144 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 2145 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 2146 sysctl_createv(clog, 0, NULL, NULL, 2147 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 2148 CTLTYPE_INT, "slowhz", 2149 SYSCTL_DESCR("Keepalive ticks per second"), 2150 NULL, PR_SLOWHZ, NULL, 0, 2151 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 2152 sysctl_createv(clog, 0, NULL, NULL, 2153 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2154 CTLTYPE_INT, "log_refused", 2155 SYSCTL_DESCR("Log refused TCP connections"), 2156 NULL, 0, &tcp_log_refused, 0, 2157 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 2158 #if 0 /* obsoleted */ 2159 sysctl_createv(clog, 0, NULL, NULL, 2160 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2161 CTLTYPE_INT, "rstratelimit", NULL, 2162 NULL, 0, &tcp_rst_ratelim, 0, 2163 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 2164 #endif 2165 sysctl_createv(clog, 0, NULL, NULL, 2166 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2167 CTLTYPE_INT, "rstppslimit", 2168 SYSCTL_DESCR("Maximum number of RST packets to send " 2169 "per second"), 2170 NULL, 0, &tcp_rst_ppslim, 0, 2171 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 2172 sysctl_createv(clog, 0, NULL, NULL, 2173 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2174 CTLTYPE_INT, "delack_ticks", 2175 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 2176 NULL, 0, &tcp_delack_ticks, 0, 2177 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 2178 sysctl_createv(clog, 0, NULL, NULL, 2179 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2180 CTLTYPE_INT, "init_win_local", 2181 SYSCTL_DESCR("Initial TCP window size (in segments)"), 2182 sysctl_tcp_init_win, 0, &tcp_init_win_local, 0, 2183 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 2184 CTL_EOL); 2185 sysctl_createv(clog, 0, NULL, NULL, 2186 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2187 CTLTYPE_STRUCT, "ident", 2188 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 2189 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 2190 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 2191 sysctl_createv(clog, 0, NULL, NULL, 2192 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2193 CTLTYPE_INT, "do_loopback_cksum", 2194 SYSCTL_DESCR("Perform TCP checksum on loopback"), 2195 NULL, 0, &tcp_do_loopback_cksum, 0, 2196 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 2197 CTL_EOL); 2198 sysctl_createv(clog, 0, NULL, NULL, 2199 CTLFLAG_PERMANENT, 2200 CTLTYPE_STRUCT, "pcblist", 2201 SYSCTL_DESCR("TCP protocol control block list"), 2202 sysctl_inpcblist, 0, &tcbtable, 0, 2203 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2204 CTL_EOL); 2205 sysctl_createv(clog, 0, NULL, NULL, 2206 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2207 CTLTYPE_INT, "keepinit", 2208 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 2209 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 2210 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2211 2212 /* TCP socket buffers auto-sizing nodes */ 2213 sysctl_createv(clog, 0, NULL, NULL, 2214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2215 CTLTYPE_INT, "recvbuf_auto", 2216 SYSCTL_DESCR("Enable automatic receive " 2217 "buffer sizing (experimental)"), 2218 NULL, 0, &tcp_do_autorcvbuf, 0, 2219 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2220 sysctl_createv(clog, 0, NULL, NULL, 2221 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2222 CTLTYPE_INT, "recvbuf_inc", 2223 SYSCTL_DESCR("Incrementor step size of " 2224 "automatic receive buffer"), 2225 NULL, 0, &tcp_autorcvbuf_inc, 0, 2226 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2227 sysctl_createv(clog, 0, NULL, NULL, 2228 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2229 CTLTYPE_INT, "recvbuf_max", 2230 SYSCTL_DESCR("Max size of automatic receive buffer"), 2231 NULL, 0, &tcp_autorcvbuf_max, 0, 2232 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2233 2234 sysctl_createv(clog, 0, NULL, NULL, 2235 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2236 CTLTYPE_INT, "sendbuf_auto", 2237 SYSCTL_DESCR("Enable automatic send " 2238 "buffer sizing (experimental)"), 2239 NULL, 0, &tcp_do_autosndbuf, 0, 2240 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2241 sysctl_createv(clog, 0, NULL, NULL, 2242 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2243 CTLTYPE_INT, "sendbuf_inc", 2244 SYSCTL_DESCR("Incrementor step size of " 2245 "automatic send buffer"), 2246 NULL, 0, &tcp_autosndbuf_inc, 0, 2247 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2248 sysctl_createv(clog, 0, NULL, NULL, 2249 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2250 CTLTYPE_INT, "sendbuf_max", 2251 SYSCTL_DESCR("Max size of automatic send buffer"), 2252 NULL, 0, &tcp_autosndbuf_max, 0, 2253 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2254 2255 /* ECN subtree */ 2256 sysctl_createv(clog, 0, NULL, &ecn_node, 2257 CTLFLAG_PERMANENT, 2258 CTLTYPE_NODE, "ecn", 2259 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 2260 NULL, 0, NULL, 0, 2261 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2262 sysctl_createv(clog, 0, &ecn_node, NULL, 2263 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2264 CTLTYPE_INT, "enable", 2265 SYSCTL_DESCR("Enable TCP Explicit Congestion " 2266 "Notification"), 2267 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 2268 sysctl_createv(clog, 0, &ecn_node, NULL, 2269 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2270 CTLTYPE_INT, "maxretries", 2271 SYSCTL_DESCR("Number of times to retry ECN setup " 2272 "before disabling ECN on the connection"), 2273 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 2274 2275 /* SACK gets it's own little subtree. */ 2276 sysctl_createv(clog, 0, NULL, &sack_node, 2277 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2278 CTLTYPE_INT, "enable", 2279 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 2280 NULL, 0, &tcp_do_sack, 0, 2281 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2282 sysctl_createv(clog, 0, NULL, &sack_node, 2283 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2284 CTLTYPE_INT, "maxholes", 2285 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 2286 NULL, 0, &tcp_sack_tp_maxholes, 0, 2287 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2288 sysctl_createv(clog, 0, NULL, &sack_node, 2289 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2290 CTLTYPE_INT, "globalmaxholes", 2291 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 2292 NULL, 0, &tcp_sack_globalmaxholes, 0, 2293 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2294 sysctl_createv(clog, 0, NULL, &sack_node, 2295 CTLFLAG_PERMANENT, 2296 CTLTYPE_INT, "globalholes", 2297 SYSCTL_DESCR("Global number of TCP SACK holes"), 2298 NULL, 0, &tcp_sack_globalholes, 0, 2299 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2300 2301 sysctl_createv(clog, 0, NULL, NULL, 2302 CTLFLAG_PERMANENT, 2303 CTLTYPE_STRUCT, "stats", 2304 SYSCTL_DESCR("TCP statistics"), 2305 sysctl_net_inet_tcp_stats, 0, NULL, 0, 2306 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 2307 CTL_EOL); 2308 sysctl_createv(clog, 0, NULL, NULL, 2309 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2310 CTLTYPE_INT, "local_by_rtt", 2311 SYSCTL_DESCR("Use RTT estimator to decide which hosts " 2312 "are local"), 2313 NULL, 0, &tcp_rttlocal, 0, 2314 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2315 #ifdef TCP_DEBUG 2316 sysctl_createv(clog, 0, NULL, NULL, 2317 CTLFLAG_PERMANENT, 2318 CTLTYPE_STRUCT, "debug", 2319 SYSCTL_DESCR("TCP sockets debug information"), 2320 NULL, 0, &tcp_debug, sizeof(tcp_debug), 2321 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 2322 CTL_EOL); 2323 sysctl_createv(clog, 0, NULL, NULL, 2324 CTLFLAG_PERMANENT, 2325 CTLTYPE_INT, "debx", 2326 SYSCTL_DESCR("Number of TCP debug sockets messages"), 2327 NULL, 0, &tcp_debx, sizeof(tcp_debx), 2328 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 2329 CTL_EOL); 2330 #endif 2331 sysctl_createv(clog, 0, NULL, NULL, 2332 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2333 CTLTYPE_STRUCT, "drop", 2334 SYSCTL_DESCR("TCP drop connection"), 2335 sysctl_net_inet_tcp_drop, 0, NULL, 0, 2336 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 2337 sysctl_createv(clog, 0, NULL, NULL, 2338 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2339 CTLTYPE_INT, "iss_hash", 2340 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 2341 "hash computation"), 2342 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 2343 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2344 CTL_EOL); 2345 2346 /* ABC subtree */ 2347 2348 sysctl_createv(clog, 0, NULL, &abc_node, 2349 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2350 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2351 NULL, 0, NULL, 0, 2352 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2353 sysctl_createv(clog, 0, &abc_node, NULL, 2354 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2355 CTLTYPE_INT, "enable", 2356 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2357 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2358 sysctl_createv(clog, 0, &abc_node, NULL, 2359 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2360 CTLTYPE_INT, "aggressive", 2361 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2362 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2363 2364 /* MSL tuning subtree */ 2365 2366 sysctl_createv(clog, 0, NULL, &mslt_node, 2367 CTLFLAG_PERMANENT, CTLTYPE_NODE, "mslt", 2368 SYSCTL_DESCR("MSL Tuning for TIME_WAIT truncation"), 2369 NULL, 0, NULL, 0, 2370 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2371 sysctl_createv(clog, 0, &mslt_node, NULL, 2372 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2373 CTLTYPE_INT, "enable", 2374 SYSCTL_DESCR("Enable TIME_WAIT truncation"), 2375 NULL, 0, &tcp_msl_enable, 0, CTL_CREATE, CTL_EOL); 2376 sysctl_createv(clog, 0, &mslt_node, NULL, 2377 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2378 CTLTYPE_INT, "loopback", 2379 SYSCTL_DESCR("MSL value to use for loopback connections"), 2380 NULL, 0, &tcp_msl_loop, 0, CTL_CREATE, CTL_EOL); 2381 sysctl_createv(clog, 0, &mslt_node, NULL, 2382 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2383 CTLTYPE_INT, "local", 2384 SYSCTL_DESCR("MSL value to use for local connections"), 2385 NULL, 0, &tcp_msl_local, 0, CTL_CREATE, CTL_EOL); 2386 sysctl_createv(clog, 0, &mslt_node, NULL, 2387 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2388 CTLTYPE_INT, "remote", 2389 SYSCTL_DESCR("MSL value to use for remote connections"), 2390 NULL, 0, &tcp_msl_remote, 0, CTL_CREATE, CTL_EOL); 2391 sysctl_createv(clog, 0, &mslt_node, NULL, 2392 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2393 CTLTYPE_INT, "remote_threshold", 2394 SYSCTL_DESCR("RTT estimate value to promote local to remote"), 2395 NULL, 0, &tcp_msl_remote_threshold, 0, CTL_CREATE, CTL_EOL); 2396 2397 /* vestigial TIME_WAIT tuning subtree */ 2398 2399 sysctl_createv(clog, 0, NULL, &vtw_node, 2400 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vtw", 2401 SYSCTL_DESCR("Tuning for Vestigial TIME_WAIT"), 2402 NULL, 0, NULL, 0, 2403 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2404 sysctl_createv(clog, 0, &vtw_node, NULL, 2405 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2406 CTLTYPE_INT, "enable", 2407 SYSCTL_DESCR("Enable Vestigial TIME_WAIT"), 2408 sysctl_tcp_vtw_enable, 0, 2409 (pf == AF_INET) ? &tcp4_vtw_enable : &tcp6_vtw_enable, 2410 0, CTL_CREATE, CTL_EOL); 2411 sysctl_createv(clog, 0, &vtw_node, NULL, 2412 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 2413 CTLTYPE_INT, "entries", 2414 SYSCTL_DESCR("Maximum number of vestigial TIME_WAIT entries"), 2415 NULL, 0, &tcp_vtw_entries, 0, CTL_CREATE, CTL_EOL); 2416 } 2417 2418 void 2419 tcp_usrreq_init(void) 2420 { 2421 2422 #ifdef INET 2423 sysctl_net_inet_tcp_setup2(NULL, PF_INET, "inet", "tcp"); 2424 #endif 2425 #ifdef INET6 2426 sysctl_net_inet_tcp_setup2(NULL, PF_INET6, "inet6", "tcp6"); 2427 #endif 2428 } 2429 2430 PR_WRAP_USRREQS(tcp) 2431 #define tcp_attach tcp_attach_wrapper 2432 #define tcp_detach tcp_detach_wrapper 2433 #define tcp_accept tcp_accept_wrapper 2434 #define tcp_ioctl tcp_ioctl_wrapper 2435 #define tcp_stat tcp_stat_wrapper 2436 #define tcp_peeraddr tcp_peeraddr_wrapper 2437 #define tcp_sockaddr tcp_sockaddr_wrapper 2438 #define tcp_recvoob tcp_recvoob_wrapper 2439 #define tcp_sendoob tcp_sendoob_wrapper 2440 #define tcp_usrreq tcp_usrreq_wrapper 2441 2442 const struct pr_usrreqs tcp_usrreqs = { 2443 .pr_attach = tcp_attach, 2444 .pr_detach = tcp_detach, 2445 .pr_accept = tcp_accept, 2446 .pr_ioctl = tcp_ioctl, 2447 .pr_stat = tcp_stat, 2448 .pr_peeraddr = tcp_peeraddr, 2449 .pr_sockaddr = tcp_sockaddr, 2450 .pr_recvoob = tcp_recvoob, 2451 .pr_sendoob = tcp_sendoob, 2452 .pr_generic = tcp_usrreq, 2453 }; 2454
Indexes created Sun Sep 21 20:09:37 GMT 2025