tcp_usrreq.c revision 1.159.2.1
1 /* $NetBSD: tcp_usrreq.c,v 1.159.2.1 2011/06/23 14:20:26 cherry 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 #include <sys/cdefs.h> 98 __KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.159.2.1 2011/06/23 14:20:26 cherry Exp $"); 99 100 #include "opt_inet.h" 101 #include "opt_ipsec.h" 102 #include "opt_tcp_debug.h" 103 #include "opt_mbuftrace.h" 104 #include "rnd.h" 105 106 #include <sys/param.h> 107 #include <sys/systm.h> 108 #include <sys/kernel.h> 109 #include <sys/malloc.h> 110 #include <sys/mbuf.h> 111 #include <sys/socket.h> 112 #include <sys/socketvar.h> 113 #include <sys/protosw.h> 114 #include <sys/errno.h> 115 #include <sys/stat.h> 116 #include <sys/proc.h> 117 #include <sys/domain.h> 118 #include <sys/sysctl.h> 119 #include <sys/kauth.h> 120 #include <sys/uidinfo.h> 121 122 #include <net/if.h> 123 #include <net/route.h> 124 125 #include <netinet/in.h> 126 #include <netinet/in_systm.h> 127 #include <netinet/in_var.h> 128 #include <netinet/ip.h> 129 #include <netinet/in_pcb.h> 130 #include <netinet/ip_var.h> 131 #include <netinet/in_offload.h> 132 133 #ifdef INET6 134 #ifndef INET 135 #include <netinet/in.h> 136 #endif 137 #include <netinet/ip6.h> 138 #include <netinet6/in6_pcb.h> 139 #include <netinet6/ip6_var.h> 140 #include <netinet6/scope6_var.h> 141 #endif 142 143 #include <netinet/tcp.h> 144 #include <netinet/tcp_fsm.h> 145 #include <netinet/tcp_seq.h> 146 #include <netinet/tcp_timer.h> 147 #include <netinet/tcp_var.h> 148 #include <netinet/tcp_private.h> 149 #include <netinet/tcp_congctl.h> 150 #include <netinet/tcpip.h> 151 #include <netinet/tcp_debug.h> 152 #include <netinet/tcp_vtw.h> 153 154 #include "opt_tcp_space.h" 155 156 #ifdef IPSEC 157 #include <netinet6/ipsec.h> 158 #endif /*IPSEC*/ 159 160 /* 161 * TCP protocol interface to socket abstraction. 162 */ 163 164 /* 165 * Process a TCP user request for TCP tb. If this is a send request 166 * then m is the mbuf chain of send data. If this is a timer expiration 167 * (called from the software clock routine), then timertype tells which timer. 168 */ 169 /*ARGSUSED*/ 170 int 171 tcp_usrreq(struct socket *so, int req, 172 struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l) 173 { 174 struct inpcb *inp; 175 #ifdef INET6 176 struct in6pcb *in6p; 177 #endif 178 struct tcpcb *tp = NULL; 179 int s; 180 int error = 0; 181 #ifdef TCP_DEBUG 182 int ostate = 0; 183 #endif 184 int family; /* family of the socket */ 185 186 family = so->so_proto->pr_domain->dom_family; 187 188 if (req == PRU_CONTROL) { 189 switch (family) { 190 #ifdef INET 191 case PF_INET: 192 return (in_control(so, (long)m, (void *)nam, 193 (struct ifnet *)control, l)); 194 #endif 195 #ifdef INET6 196 case PF_INET6: 197 return (in6_control(so, (long)m, (void *)nam, 198 (struct ifnet *)control, l)); 199 #endif 200 default: 201 return EAFNOSUPPORT; 202 } 203 } 204 205 s = splsoftnet(); 206 207 if (req == PRU_PURGEIF) { 208 mutex_enter(softnet_lock); 209 switch (family) { 210 #ifdef INET 211 case PF_INET: 212 in_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 213 in_purgeif((struct ifnet *)control); 214 in_pcbpurgeif(&tcbtable, (struct ifnet *)control); 215 break; 216 #endif 217 #ifdef INET6 218 case PF_INET6: 219 in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 220 in6_purgeif((struct ifnet *)control); 221 in6_pcbpurgeif(&tcbtable, (struct ifnet *)control); 222 break; 223 #endif 224 default: 225 mutex_exit(softnet_lock); 226 splx(s); 227 return (EAFNOSUPPORT); 228 } 229 mutex_exit(softnet_lock); 230 splx(s); 231 return (0); 232 } 233 234 if (req == PRU_ATTACH) 235 sosetlock(so); 236 237 switch (family) { 238 #ifdef INET 239 case PF_INET: 240 inp = sotoinpcb(so); 241 #ifdef INET6 242 in6p = NULL; 243 #endif 244 break; 245 #endif 246 #ifdef INET6 247 case PF_INET6: 248 inp = NULL; 249 in6p = sotoin6pcb(so); 250 break; 251 #endif 252 default: 253 splx(s); 254 return EAFNOSUPPORT; 255 } 256 257 #ifdef DIAGNOSTIC 258 #ifdef INET6 259 if (inp && in6p) 260 panic("tcp_usrreq: both inp and in6p set to non-NULL"); 261 #endif 262 if (req != PRU_SEND && req != PRU_SENDOOB && control) 263 panic("tcp_usrreq: unexpected control mbuf"); 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 #ifndef INET6 271 if (inp == 0 && req != PRU_ATTACH) 272 #else 273 if ((inp == 0 && in6p == 0) && req != PRU_ATTACH) 274 #endif 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 #ifdef KPROF 284 tcp_acounts[tp->t_state][req]++; 285 #endif 286 #ifdef TCP_DEBUG 287 ostate = tp->t_state; 288 #endif 289 } 290 #endif 291 #ifdef INET6 292 if (in6p) { 293 tp = in6totcpcb(in6p); 294 /* WHAT IF TP IS 0? */ 295 #ifdef KPROF 296 tcp_acounts[tp->t_state][req]++; 297 #endif 298 #ifdef TCP_DEBUG 299 ostate = tp->t_state; 300 #endif 301 } 302 #endif 303 304 switch (req) { 305 306 /* 307 * TCP attaches to socket via PRU_ATTACH, reserving space, 308 * and an internet control block. 309 */ 310 case PRU_ATTACH: 311 #ifndef INET6 312 if (inp != 0) 313 #else 314 if (inp != 0 || in6p != 0) 315 #endif 316 { 317 error = EISCONN; 318 break; 319 } 320 error = tcp_attach(so); 321 if (error) 322 break; 323 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 324 so->so_linger = TCP_LINGERTIME; 325 tp = sototcpcb(so); 326 break; 327 328 /* 329 * PRU_DETACH detaches the TCP protocol from the socket. 330 */ 331 case PRU_DETACH: 332 tp = tcp_disconnect(tp); 333 break; 334 335 /* 336 * Give the socket an address. 337 */ 338 case PRU_BIND: 339 switch (family) { 340 #ifdef INET 341 case PF_INET: 342 error = in_pcbbind(inp, nam, l); 343 break; 344 #endif 345 #ifdef INET6 346 case PF_INET6: 347 error = in6_pcbbind(in6p, nam, l); 348 if (!error) { 349 /* mapped addr case */ 350 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 351 tp->t_family = AF_INET; 352 else 353 tp->t_family = AF_INET6; 354 } 355 break; 356 #endif 357 } 358 break; 359 360 /* 361 * Prepare to accept connections. 362 */ 363 case PRU_LISTEN: 364 #ifdef INET 365 if (inp && inp->inp_lport == 0) { 366 error = in_pcbbind(inp, NULL, l); 367 if (error) 368 break; 369 } 370 #endif 371 #ifdef INET6 372 if (in6p && in6p->in6p_lport == 0) { 373 error = in6_pcbbind(in6p, NULL, l); 374 if (error) 375 break; 376 } 377 #endif 378 tp->t_state = TCPS_LISTEN; 379 break; 380 381 /* 382 * Initiate connection to peer. 383 * Create a template for use in transmissions on this connection. 384 * Enter SYN_SENT state, and mark socket as connecting. 385 * Start keep-alive timer, and seed output sequence space. 386 * Send initial segment on connection. 387 */ 388 case PRU_CONNECT: 389 #ifdef INET 390 if (inp) { 391 if (inp->inp_lport == 0) { 392 error = in_pcbbind(inp, NULL, l); 393 if (error) 394 break; 395 } 396 error = in_pcbconnect(inp, nam, l); 397 } 398 #endif 399 #ifdef INET6 400 if (in6p) { 401 if (in6p->in6p_lport == 0) { 402 error = in6_pcbbind(in6p, NULL, l); 403 if (error) 404 break; 405 } 406 error = in6_pcbconnect(in6p, nam, l); 407 if (!error) { 408 /* mapped addr case */ 409 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) 410 tp->t_family = AF_INET; 411 else 412 tp->t_family = AF_INET6; 413 } 414 } 415 #endif 416 if (error) 417 break; 418 tp->t_template = tcp_template(tp); 419 if (tp->t_template == 0) { 420 #ifdef INET 421 if (inp) 422 in_pcbdisconnect(inp); 423 #endif 424 #ifdef INET6 425 if (in6p) 426 in6_pcbdisconnect(in6p); 427 #endif 428 error = ENOBUFS; 429 break; 430 } 431 /* 432 * Compute window scaling to request. 433 * XXX: This should be moved to tcp_output(). 434 */ 435 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 436 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 437 tp->request_r_scale++; 438 soisconnecting(so); 439 TCP_STATINC(TCP_STAT_CONNATTEMPT); 440 tp->t_state = TCPS_SYN_SENT; 441 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 442 tp->iss = tcp_new_iss(tp, 0); 443 tcp_sendseqinit(tp); 444 error = tcp_output(tp); 445 break; 446 447 /* 448 * Create a TCP connection between two sockets. 449 */ 450 case PRU_CONNECT2: 451 error = EOPNOTSUPP; 452 break; 453 454 /* 455 * Initiate disconnect from peer. 456 * If connection never passed embryonic stage, just drop; 457 * else if don't need to let data drain, then can just drop anyways, 458 * else have to begin TCP shutdown process: mark socket disconnecting, 459 * drain unread data, state switch to reflect user close, and 460 * send segment (e.g. FIN) to peer. Socket will be really disconnected 461 * when peer sends FIN and acks ours. 462 * 463 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 464 */ 465 case PRU_DISCONNECT: 466 tp = tcp_disconnect(tp); 467 break; 468 469 /* 470 * Accept a connection. Essentially all the work is 471 * done at higher levels; just return the address 472 * of the peer, storing through addr. 473 */ 474 case PRU_ACCEPT: 475 #ifdef INET 476 if (inp) 477 in_setpeeraddr(inp, nam); 478 #endif 479 #ifdef INET6 480 if (in6p) 481 in6_setpeeraddr(in6p, nam); 482 #endif 483 break; 484 485 /* 486 * Mark the connection as being incapable of further output. 487 */ 488 case PRU_SHUTDOWN: 489 socantsendmore(so); 490 tp = tcp_usrclosed(tp); 491 if (tp) 492 error = tcp_output(tp); 493 break; 494 495 /* 496 * After a receive, possibly send window update to peer. 497 */ 498 case PRU_RCVD: 499 /* 500 * soreceive() calls this function when a user receives 501 * ancillary data on a listening socket. We don't call 502 * tcp_output in such a case, since there is no header 503 * template for a listening socket and hence the kernel 504 * will panic. 505 */ 506 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 507 (void) tcp_output(tp); 508 break; 509 510 /* 511 * Do a send by putting data in output queue and updating urgent 512 * marker if URG set. Possibly send more data. 513 */ 514 case PRU_SEND: 515 if (control && control->m_len) { 516 m_freem(control); 517 m_freem(m); 518 error = EINVAL; 519 break; 520 } 521 sbappendstream(&so->so_snd, m); 522 error = tcp_output(tp); 523 break; 524 525 /* 526 * Abort the TCP. 527 */ 528 case PRU_ABORT: 529 tp = tcp_drop(tp, ECONNABORTED); 530 break; 531 532 case PRU_SENSE: 533 /* 534 * stat: don't bother with a blocksize. 535 */ 536 splx(s); 537 return (0); 538 539 case PRU_RCVOOB: 540 if (control && control->m_len) { 541 m_freem(control); 542 m_freem(m); 543 error = EINVAL; 544 break; 545 } 546 if ((so->so_oobmark == 0 && 547 (so->so_state & SS_RCVATMARK) == 0) || 548 so->so_options & SO_OOBINLINE || 549 tp->t_oobflags & TCPOOB_HADDATA) { 550 error = EINVAL; 551 break; 552 } 553 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 554 error = EWOULDBLOCK; 555 break; 556 } 557 m->m_len = 1; 558 *mtod(m, char *) = tp->t_iobc; 559 if (((long)nam & MSG_PEEK) == 0) 560 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 561 break; 562 563 case PRU_SENDOOB: 564 if (sbspace(&so->so_snd) < -512) { 565 m_freem(m); 566 error = ENOBUFS; 567 break; 568 } 569 /* 570 * According to RFC961 (Assigned Protocols), 571 * the urgent pointer points to the last octet 572 * of urgent data. We continue, however, 573 * to consider it to indicate the first octet 574 * of data past the urgent section. 575 * Otherwise, snd_up should be one lower. 576 */ 577 sbappendstream(&so->so_snd, m); 578 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 579 tp->t_force = 1; 580 error = tcp_output(tp); 581 tp->t_force = 0; 582 break; 583 584 case PRU_SOCKADDR: 585 #ifdef INET 586 if (inp) 587 in_setsockaddr(inp, nam); 588 #endif 589 #ifdef INET6 590 if (in6p) 591 in6_setsockaddr(in6p, nam); 592 #endif 593 break; 594 595 case PRU_PEERADDR: 596 #ifdef INET 597 if (inp) 598 in_setpeeraddr(inp, nam); 599 #endif 600 #ifdef INET6 601 if (in6p) 602 in6_setpeeraddr(in6p, nam); 603 #endif 604 break; 605 606 default: 607 panic("tcp_usrreq"); 608 } 609 #ifdef TCP_DEBUG 610 if (tp && (so->so_options & SO_DEBUG)) 611 tcp_trace(TA_USER, ostate, tp, NULL, req); 612 #endif 613 614 release: 615 splx(s); 616 return (error); 617 } 618 619 static void 620 change_keepalive(struct socket *so, struct tcpcb *tp) 621 { 622 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 623 TCP_TIMER_DISARM(tp, TCPT_KEEP); 624 TCP_TIMER_DISARM(tp, TCPT_2MSL); 625 626 if (tp->t_state == TCPS_SYN_RECEIVED || 627 tp->t_state == TCPS_SYN_SENT) { 628 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 629 } else if (so->so_options & SO_KEEPALIVE && 630 tp->t_state <= TCPS_CLOSE_WAIT) { 631 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 632 } else { 633 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 634 } 635 636 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 637 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 638 } 639 640 641 int 642 tcp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 643 { 644 int error = 0, s; 645 struct inpcb *inp; 646 #ifdef INET6 647 struct in6pcb *in6p; 648 #endif 649 struct tcpcb *tp; 650 u_int ui; 651 int family; /* family of the socket */ 652 int level, optname, optval; 653 654 level = sopt->sopt_level; 655 optname = sopt->sopt_name; 656 657 family = so->so_proto->pr_domain->dom_family; 658 659 s = splsoftnet(); 660 switch (family) { 661 #ifdef INET 662 case PF_INET: 663 inp = sotoinpcb(so); 664 #ifdef INET6 665 in6p = NULL; 666 #endif 667 break; 668 #endif 669 #ifdef INET6 670 case PF_INET6: 671 inp = NULL; 672 in6p = sotoin6pcb(so); 673 break; 674 #endif 675 default: 676 splx(s); 677 panic("%s: af %d", __func__, family); 678 } 679 #ifndef INET6 680 if (inp == NULL) 681 #else 682 if (inp == NULL && in6p == NULL) 683 #endif 684 { 685 splx(s); 686 return (ECONNRESET); 687 } 688 if (level != IPPROTO_TCP) { 689 switch (family) { 690 #ifdef INET 691 case PF_INET: 692 error = ip_ctloutput(op, so, sopt); 693 break; 694 #endif 695 #ifdef INET6 696 case PF_INET6: 697 error = ip6_ctloutput(op, so, sopt); 698 break; 699 #endif 700 } 701 splx(s); 702 return (error); 703 } 704 if (inp) 705 tp = intotcpcb(inp); 706 #ifdef INET6 707 else if (in6p) 708 tp = in6totcpcb(in6p); 709 #endif 710 else 711 tp = NULL; 712 713 switch (op) { 714 case PRCO_SETOPT: 715 switch (optname) { 716 #ifdef TCP_SIGNATURE 717 case TCP_MD5SIG: 718 error = sockopt_getint(sopt, &optval); 719 if (error) 720 break; 721 if (optval > 0) 722 tp->t_flags |= TF_SIGNATURE; 723 else 724 tp->t_flags &= ~TF_SIGNATURE; 725 break; 726 #endif /* TCP_SIGNATURE */ 727 728 case TCP_NODELAY: 729 error = sockopt_getint(sopt, &optval); 730 if (error) 731 break; 732 if (optval) 733 tp->t_flags |= TF_NODELAY; 734 else 735 tp->t_flags &= ~TF_NODELAY; 736 break; 737 738 case TCP_MAXSEG: 739 error = sockopt_getint(sopt, &optval); 740 if (error) 741 break; 742 if (optval > 0 && optval <= tp->t_peermss) 743 tp->t_peermss = optval; /* limit on send size */ 744 else 745 error = EINVAL; 746 break; 747 #ifdef notyet 748 case TCP_CONGCTL: 749 /* XXX string overflow XXX */ 750 error = tcp_congctl_select(tp, sopt->sopt_data); 751 break; 752 #endif 753 754 case TCP_KEEPIDLE: 755 error = sockopt_get(sopt, &ui, sizeof(ui)); 756 if (error) 757 break; 758 if (ui > 0) { 759 tp->t_keepidle = ui; 760 change_keepalive(so, tp); 761 } else 762 error = EINVAL; 763 break; 764 765 case TCP_KEEPINTVL: 766 error = sockopt_get(sopt, &ui, sizeof(ui)); 767 if (error) 768 break; 769 if (ui > 0) { 770 tp->t_keepintvl = ui; 771 change_keepalive(so, tp); 772 } else 773 error = EINVAL; 774 break; 775 776 case TCP_KEEPCNT: 777 error = sockopt_get(sopt, &ui, sizeof(ui)); 778 if (error) 779 break; 780 if (ui > 0) { 781 tp->t_keepcnt = ui; 782 change_keepalive(so, tp); 783 } else 784 error = EINVAL; 785 break; 786 787 case TCP_KEEPINIT: 788 error = sockopt_get(sopt, &ui, sizeof(ui)); 789 if (error) 790 break; 791 if (ui > 0) { 792 tp->t_keepinit = ui; 793 change_keepalive(so, tp); 794 } else 795 error = EINVAL; 796 break; 797 798 default: 799 error = ENOPROTOOPT; 800 break; 801 } 802 break; 803 804 case PRCO_GETOPT: 805 switch (optname) { 806 #ifdef TCP_SIGNATURE 807 case TCP_MD5SIG: 808 optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 809 error = sockopt_set(sopt, &optval, sizeof(optval)); 810 break; 811 #endif 812 case TCP_NODELAY: 813 optval = tp->t_flags & TF_NODELAY; 814 error = sockopt_set(sopt, &optval, sizeof(optval)); 815 break; 816 case TCP_MAXSEG: 817 optval = tp->t_peermss; 818 error = sockopt_set(sopt, &optval, sizeof(optval)); 819 break; 820 #ifdef notyet 821 case TCP_CONGCTL: 822 break; 823 #endif 824 default: 825 error = ENOPROTOOPT; 826 break; 827 } 828 break; 829 } 830 splx(s); 831 return (error); 832 } 833 834 #ifndef TCP_SENDSPACE 835 #define TCP_SENDSPACE 1024*32 836 #endif 837 int tcp_sendspace = TCP_SENDSPACE; 838 #ifndef TCP_RECVSPACE 839 #define TCP_RECVSPACE 1024*32 840 #endif 841 int tcp_recvspace = TCP_RECVSPACE; 842 843 /* 844 * Attach TCP protocol to socket, allocating 845 * internet protocol control block, tcp control block, 846 * bufer space, and entering LISTEN state if to accept connections. 847 */ 848 int 849 tcp_attach(struct socket *so) 850 { 851 struct tcpcb *tp; 852 struct inpcb *inp; 853 #ifdef INET6 854 struct in6pcb *in6p; 855 #endif 856 int error; 857 int family; /* family of the socket */ 858 859 family = so->so_proto->pr_domain->dom_family; 860 861 #ifdef MBUFTRACE 862 so->so_mowner = &tcp_sock_mowner; 863 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 864 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 865 #endif 866 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 867 error = soreserve(so, tcp_sendspace, tcp_recvspace); 868 if (error) 869 return (error); 870 } 871 872 so->so_rcv.sb_flags |= SB_AUTOSIZE; 873 so->so_snd.sb_flags |= SB_AUTOSIZE; 874 875 switch (family) { 876 #ifdef INET 877 case PF_INET: 878 error = in_pcballoc(so, &tcbtable); 879 if (error) 880 return (error); 881 inp = sotoinpcb(so); 882 #ifdef INET6 883 in6p = NULL; 884 #endif 885 break; 886 #endif 887 #ifdef INET6 888 case PF_INET6: 889 error = in6_pcballoc(so, &tcbtable); 890 if (error) 891 return (error); 892 inp = NULL; 893 in6p = sotoin6pcb(so); 894 break; 895 #endif 896 default: 897 return EAFNOSUPPORT; 898 } 899 if (inp) 900 tp = tcp_newtcpcb(family, (void *)inp); 901 #ifdef INET6 902 else if (in6p) 903 tp = tcp_newtcpcb(family, (void *)in6p); 904 #endif 905 else 906 tp = NULL; 907 908 if (tp == 0) { 909 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 910 911 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 912 #ifdef INET 913 if (inp) 914 in_pcbdetach(inp); 915 #endif 916 #ifdef INET6 917 if (in6p) 918 in6_pcbdetach(in6p); 919 #endif 920 so->so_state |= nofd; 921 return (ENOBUFS); 922 } 923 tp->t_state = TCPS_CLOSED; 924 return (0); 925 } 926 927 /* 928 * Initiate (or continue) disconnect. 929 * If embryonic state, just send reset (once). 930 * If in ``let data drain'' option and linger null, just drop. 931 * Otherwise (hard), mark socket disconnecting and drop 932 * current input data; switch states based on user close, and 933 * send segment to peer (with FIN). 934 */ 935 struct tcpcb * 936 tcp_disconnect(struct tcpcb *tp) 937 { 938 struct socket *so; 939 940 if (tp->t_inpcb) 941 so = tp->t_inpcb->inp_socket; 942 #ifdef INET6 943 else if (tp->t_in6pcb) 944 so = tp->t_in6pcb->in6p_socket; 945 #endif 946 else 947 so = NULL; 948 949 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 950 tp = tcp_close(tp); 951 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 952 tp = tcp_drop(tp, 0); 953 else { 954 soisdisconnecting(so); 955 sbflush(&so->so_rcv); 956 tp = tcp_usrclosed(tp); 957 if (tp) 958 (void) tcp_output(tp); 959 } 960 return (tp); 961 } 962 963 /* 964 * User issued close, and wish to trail through shutdown states: 965 * if never received SYN, just forget it. If got a SYN from peer, 966 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 967 * If already got a FIN from peer, then almost done; go to LAST_ACK 968 * state. In all other cases, have already sent FIN to peer (e.g. 969 * after PRU_SHUTDOWN), and just have to play tedious game waiting 970 * for peer to send FIN or not respond to keep-alives, etc. 971 * We can let the user exit from the close as soon as the FIN is acked. 972 */ 973 struct tcpcb * 974 tcp_usrclosed(struct tcpcb *tp) 975 { 976 977 switch (tp->t_state) { 978 979 case TCPS_CLOSED: 980 case TCPS_LISTEN: 981 case TCPS_SYN_SENT: 982 tp->t_state = TCPS_CLOSED; 983 tp = tcp_close(tp); 984 break; 985 986 case TCPS_SYN_RECEIVED: 987 case TCPS_ESTABLISHED: 988 tp->t_state = TCPS_FIN_WAIT_1; 989 break; 990 991 case TCPS_CLOSE_WAIT: 992 tp->t_state = TCPS_LAST_ACK; 993 break; 994 } 995 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 996 struct socket *so; 997 if (tp->t_inpcb) 998 so = tp->t_inpcb->inp_socket; 999 #ifdef INET6 1000 else if (tp->t_in6pcb) 1001 so = tp->t_in6pcb->in6p_socket; 1002 #endif 1003 else 1004 so = NULL; 1005 if (so) 1006 soisdisconnected(so); 1007 /* 1008 * If we are in FIN_WAIT_2, we arrived here because the 1009 * application did a shutdown of the send side. Like the 1010 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1011 * a full close, we start a timer to make sure sockets are 1012 * not left in FIN_WAIT_2 forever. 1013 */ 1014 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1015 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1016 else if (tp->t_state == TCPS_TIME_WAIT 1017 && ((tp->t_inpcb 1018 && (tcp4_vtw_enable & 1) 1019 && vtw_add(AF_INET, tp)) 1020 || 1021 (tp->t_in6pcb 1022 && (tcp6_vtw_enable & 1) 1023 && vtw_add(AF_INET6, tp)))) { 1024 tp = 0; 1025 } 1026 } 1027 return (tp); 1028 } 1029 1030 /* 1031 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1032 * than 32. 1033 */ 1034 static int 1035 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1036 { 1037 int error, mssdflt; 1038 struct sysctlnode node; 1039 1040 mssdflt = tcp_mssdflt; 1041 node = *rnode; 1042 node.sysctl_data = &mssdflt; 1043 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1044 if (error || newp == NULL) 1045 return (error); 1046 1047 if (mssdflt < 32) 1048 return (EINVAL); 1049 tcp_mssdflt = mssdflt; 1050 1051 return (0); 1052 } 1053 1054 /* 1055 * sysctl helper routine for setting port related values under 1056 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1057 * additional checks for each type. this code has placed in 1058 * tcp_input.c since INET and INET6 both use the same tcp code. 1059 * 1060 * this helper is not static so that both inet and inet6 can use it. 1061 */ 1062 int 1063 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1064 { 1065 int error, tmp; 1066 int apmin, apmax; 1067 #ifndef IPNOPRIVPORTS 1068 int lpmin, lpmax; 1069 #endif /* IPNOPRIVPORTS */ 1070 struct sysctlnode node; 1071 1072 if (namelen != 0) 1073 return (EINVAL); 1074 1075 switch (name[-3]) { 1076 #ifdef INET 1077 case PF_INET: 1078 apmin = anonportmin; 1079 apmax = anonportmax; 1080 #ifndef IPNOPRIVPORTS 1081 lpmin = lowportmin; 1082 lpmax = lowportmax; 1083 #endif /* IPNOPRIVPORTS */ 1084 break; 1085 #endif /* INET */ 1086 #ifdef INET6 1087 case PF_INET6: 1088 apmin = ip6_anonportmin; 1089 apmax = ip6_anonportmax; 1090 #ifndef IPNOPRIVPORTS 1091 lpmin = ip6_lowportmin; 1092 lpmax = ip6_lowportmax; 1093 #endif /* IPNOPRIVPORTS */ 1094 break; 1095 #endif /* INET6 */ 1096 default: 1097 return (EINVAL); 1098 } 1099 1100 /* 1101 * insert temporary copy into node, perform lookup on 1102 * temporary, then restore pointer 1103 */ 1104 node = *rnode; 1105 tmp = *(int*)rnode->sysctl_data; 1106 node.sysctl_data = &tmp; 1107 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1108 if (error || newp == NULL) 1109 return (error); 1110 1111 /* 1112 * simple port range check 1113 */ 1114 if (tmp < 0 || tmp > 65535) 1115 return (EINVAL); 1116 1117 /* 1118 * per-node range checks 1119 */ 1120 switch (rnode->sysctl_num) { 1121 case IPCTL_ANONPORTMIN: 1122 case IPV6CTL_ANONPORTMIN: 1123 if (tmp >= apmax) 1124 return (EINVAL); 1125 #ifndef IPNOPRIVPORTS 1126 if (tmp < IPPORT_RESERVED) 1127 return (EINVAL); 1128 #endif /* IPNOPRIVPORTS */ 1129 break; 1130 1131 case IPCTL_ANONPORTMAX: 1132 case IPV6CTL_ANONPORTMAX: 1133 if (apmin >= tmp) 1134 return (EINVAL); 1135 #ifndef IPNOPRIVPORTS 1136 if (tmp < IPPORT_RESERVED) 1137 return (EINVAL); 1138 #endif /* IPNOPRIVPORTS */ 1139 break; 1140 1141 #ifndef IPNOPRIVPORTS 1142 case IPCTL_LOWPORTMIN: 1143 case IPV6CTL_LOWPORTMIN: 1144 if (tmp >= lpmax || 1145 tmp > IPPORT_RESERVEDMAX || 1146 tmp < IPPORT_RESERVEDMIN) 1147 return (EINVAL); 1148 break; 1149 1150 case IPCTL_LOWPORTMAX: 1151 case IPV6CTL_LOWPORTMAX: 1152 if (lpmin >= tmp || 1153 tmp > IPPORT_RESERVEDMAX || 1154 tmp < IPPORT_RESERVEDMIN) 1155 return (EINVAL); 1156 break; 1157 #endif /* IPNOPRIVPORTS */ 1158 1159 default: 1160 return (EINVAL); 1161 } 1162 1163 *(int*)rnode->sysctl_data = tmp; 1164 1165 return (0); 1166 } 1167 1168 static inline int 1169 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1170 { 1171 size_t sz; 1172 int error; 1173 uid_t uid; 1174 1175 uid = kauth_cred_geteuid(sockp->so_cred); 1176 if (oldp) { 1177 sz = MIN(sizeof(uid), *oldlenp); 1178 error = copyout(&uid, oldp, sz); 1179 if (error) 1180 return error; 1181 } 1182 *oldlenp = sizeof(uid); 1183 return 0; 1184 } 1185 1186 static inline int 1187 inet4_ident_core(struct in_addr raddr, u_int rport, 1188 struct in_addr laddr, u_int lport, 1189 void *oldp, size_t *oldlenp, 1190 struct lwp *l, int dodrop) 1191 { 1192 struct inpcb *inp; 1193 struct socket *sockp; 1194 1195 inp = in_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0); 1196 1197 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1198 return ESRCH; 1199 1200 if (dodrop) { 1201 struct tcpcb *tp; 1202 int error; 1203 1204 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1205 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1206 return ESRCH; 1207 1208 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1209 KAUTH_REQ_NETWORK_SOCKET_DROP, inp->inp_socket, tp, NULL); 1210 if (error) 1211 return (error); 1212 1213 (void)tcp_drop(tp, ECONNABORTED); 1214 return 0; 1215 } 1216 else 1217 return copyout_uid(sockp, oldp, oldlenp); 1218 } 1219 1220 #ifdef INET6 1221 static inline int 1222 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1223 struct in6_addr *laddr, u_int lport, 1224 void *oldp, size_t *oldlenp, 1225 struct lwp *l, int dodrop) 1226 { 1227 struct in6pcb *in6p; 1228 struct socket *sockp; 1229 1230 in6p = in6_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0, 0); 1231 1232 if (in6p == NULL || (sockp = in6p->in6p_socket) == NULL) 1233 return ESRCH; 1234 1235 if (dodrop) { 1236 struct tcpcb *tp; 1237 int error; 1238 1239 if (in6p == NULL || (tp = in6totcpcb(in6p)) == NULL || 1240 (in6p->in6p_socket->so_options & SO_ACCEPTCONN) != 0) 1241 return ESRCH; 1242 1243 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1244 KAUTH_REQ_NETWORK_SOCKET_DROP, in6p->in6p_socket, tp, NULL); 1245 if (error) 1246 return (error); 1247 1248 (void)tcp_drop(tp, ECONNABORTED); 1249 return 0; 1250 } 1251 else 1252 return copyout_uid(sockp, oldp, oldlenp); 1253 } 1254 #endif 1255 1256 /* 1257 * sysctl helper routine for the net.inet.tcp.drop and 1258 * net.inet6.tcp6.drop nodes. 1259 */ 1260 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1261 1262 /* 1263 * sysctl helper routine for the net.inet.tcp.ident and 1264 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1265 * old way of looking up the ident information for ipv4 which involves 1266 * stuffing the port/addr pairs into the mib lookup. 1267 */ 1268 static int 1269 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1270 { 1271 #ifdef INET 1272 struct sockaddr_in *si4[2]; 1273 #endif /* INET */ 1274 #ifdef INET6 1275 struct sockaddr_in6 *si6[2]; 1276 #endif /* INET6 */ 1277 struct sockaddr_storage sa[2]; 1278 int error, pf, dodrop; 1279 1280 dodrop = name[-1] == TCPCTL_DROP; 1281 if (dodrop) { 1282 if (oldp != NULL || *oldlenp != 0) 1283 return EINVAL; 1284 if (newp == NULL) 1285 return EPERM; 1286 if (newlen < sizeof(sa)) 1287 return ENOMEM; 1288 } 1289 if (namelen != 4 && namelen != 0) 1290 return EINVAL; 1291 if (name[-2] != IPPROTO_TCP) 1292 return EINVAL; 1293 pf = name[-3]; 1294 1295 /* old style lookup, ipv4 only */ 1296 if (namelen == 4) { 1297 #ifdef INET 1298 struct in_addr laddr, raddr; 1299 u_int lport, rport; 1300 1301 if (pf != PF_INET) 1302 return EPROTONOSUPPORT; 1303 raddr.s_addr = (uint32_t)name[0]; 1304 rport = (u_int)name[1]; 1305 laddr.s_addr = (uint32_t)name[2]; 1306 lport = (u_int)name[3]; 1307 1308 mutex_enter(softnet_lock); 1309 error = inet4_ident_core(raddr, rport, laddr, lport, 1310 oldp, oldlenp, l, dodrop); 1311 mutex_exit(softnet_lock); 1312 return error; 1313 #else /* INET */ 1314 return EINVAL; 1315 #endif /* INET */ 1316 } 1317 1318 if (newp == NULL || newlen != sizeof(sa)) 1319 return EINVAL; 1320 error = copyin(newp, &sa, newlen); 1321 if (error) 1322 return error; 1323 1324 /* 1325 * requested families must match 1326 */ 1327 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1328 return EINVAL; 1329 1330 switch (pf) { 1331 #ifdef INET6 1332 case PF_INET6: 1333 si6[0] = (struct sockaddr_in6*)&sa[0]; 1334 si6[1] = (struct sockaddr_in6*)&sa[1]; 1335 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1336 si6[1]->sin6_len != sizeof(*si6[1])) 1337 return EINVAL; 1338 1339 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1340 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1341 error = sa6_embedscope(si6[0], ip6_use_defzone); 1342 if (error) 1343 return error; 1344 error = sa6_embedscope(si6[1], ip6_use_defzone); 1345 if (error) 1346 return error; 1347 1348 mutex_enter(softnet_lock); 1349 error = inet6_ident_core(&si6[0]->sin6_addr, 1350 si6[0]->sin6_port, &si6[1]->sin6_addr, 1351 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1352 mutex_exit(softnet_lock); 1353 return error; 1354 } 1355 1356 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1357 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1358 return EINVAL; 1359 1360 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1361 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1362 /*FALLTHROUGH*/ 1363 #endif /* INET6 */ 1364 #ifdef INET 1365 case PF_INET: 1366 si4[0] = (struct sockaddr_in*)&sa[0]; 1367 si4[1] = (struct sockaddr_in*)&sa[1]; 1368 if (si4[0]->sin_len != sizeof(*si4[0]) || 1369 si4[0]->sin_len != sizeof(*si4[1])) 1370 return EINVAL; 1371 1372 mutex_enter(softnet_lock); 1373 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1374 si4[1]->sin_addr, si4[1]->sin_port, 1375 oldp, oldlenp, l, dodrop); 1376 mutex_exit(softnet_lock); 1377 return error; 1378 #endif /* INET */ 1379 default: 1380 return EPROTONOSUPPORT; 1381 } 1382 } 1383 1384 /* 1385 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1386 * inet/inet6, as well as raw pcbs for each. specifically not 1387 * declared static so that raw sockets and udp/udp6 can use it as 1388 * well. 1389 */ 1390 int 1391 sysctl_inpcblist(SYSCTLFN_ARGS) 1392 { 1393 #ifdef INET 1394 struct sockaddr_in *in; 1395 const struct inpcb *inp; 1396 #endif 1397 #ifdef INET6 1398 struct sockaddr_in6 *in6; 1399 const struct in6pcb *in6p; 1400 #endif 1401 /* 1402 * sysctl_data is const, but CIRCLEQ_FOREACH can't use a const 1403 * struct inpcbtable pointer, so we have to discard const. :-/ 1404 */ 1405 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1406 const struct inpcb_hdr *inph; 1407 struct tcpcb *tp; 1408 struct kinfo_pcb pcb; 1409 char *dp; 1410 u_int op, arg; 1411 size_t len, needed, elem_size, out_size; 1412 int error, elem_count, pf, proto, pf2; 1413 1414 if (namelen != 4) 1415 return (EINVAL); 1416 1417 if (oldp != NULL) { 1418 len = *oldlenp; 1419 elem_size = name[2]; 1420 elem_count = name[3]; 1421 if (elem_size != sizeof(pcb)) 1422 return EINVAL; 1423 } else { 1424 len = 0; 1425 elem_count = INT_MAX; 1426 elem_size = sizeof(pcb); 1427 } 1428 error = 0; 1429 dp = oldp; 1430 op = name[0]; 1431 arg = name[1]; 1432 out_size = elem_size; 1433 needed = 0; 1434 1435 if (namelen == 1 && name[0] == CTL_QUERY) 1436 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1437 1438 if (name - oname != 4) 1439 return (EINVAL); 1440 1441 pf = oname[1]; 1442 proto = oname[2]; 1443 pf2 = (oldp != NULL) ? pf : 0; 1444 1445 mutex_enter(softnet_lock); 1446 1447 CIRCLEQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1448 #ifdef INET 1449 inp = (const struct inpcb *)inph; 1450 #endif 1451 #ifdef INET6 1452 in6p = (const struct in6pcb *)inph; 1453 #endif 1454 1455 if (inph->inph_af != pf) 1456 continue; 1457 1458 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1459 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1460 NULL) != 0) 1461 continue; 1462 1463 memset(&pcb, 0, sizeof(pcb)); 1464 1465 pcb.ki_family = pf; 1466 pcb.ki_type = proto; 1467 1468 switch (pf2) { 1469 case 0: 1470 /* just probing for size */ 1471 break; 1472 #ifdef INET 1473 case PF_INET: 1474 pcb.ki_family = inp->inp_socket->so_proto-> 1475 pr_domain->dom_family; 1476 pcb.ki_type = inp->inp_socket->so_proto-> 1477 pr_type; 1478 pcb.ki_protocol = inp->inp_socket->so_proto-> 1479 pr_protocol; 1480 pcb.ki_pflags = inp->inp_flags; 1481 1482 pcb.ki_sostate = inp->inp_socket->so_state; 1483 pcb.ki_prstate = inp->inp_state; 1484 if (proto == IPPROTO_TCP) { 1485 tp = intotcpcb(inp); 1486 pcb.ki_tstate = tp->t_state; 1487 pcb.ki_tflags = tp->t_flags; 1488 } 1489 1490 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1491 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1492 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1493 1494 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1495 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1496 1497 in = satosin(&pcb.ki_src); 1498 in->sin_len = sizeof(*in); 1499 in->sin_family = pf; 1500 in->sin_port = inp->inp_lport; 1501 in->sin_addr = inp->inp_laddr; 1502 if (pcb.ki_prstate >= INP_CONNECTED) { 1503 in = satosin(&pcb.ki_dst); 1504 in->sin_len = sizeof(*in); 1505 in->sin_family = pf; 1506 in->sin_port = inp->inp_fport; 1507 in->sin_addr = inp->inp_faddr; 1508 } 1509 break; 1510 #endif 1511 #ifdef INET6 1512 case PF_INET6: 1513 pcb.ki_family = in6p->in6p_socket->so_proto-> 1514 pr_domain->dom_family; 1515 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1516 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1517 pr_protocol; 1518 pcb.ki_pflags = in6p->in6p_flags; 1519 1520 pcb.ki_sostate = in6p->in6p_socket->so_state; 1521 pcb.ki_prstate = in6p->in6p_state; 1522 if (proto == IPPROTO_TCP) { 1523 tp = in6totcpcb(in6p); 1524 pcb.ki_tstate = tp->t_state; 1525 pcb.ki_tflags = tp->t_flags; 1526 } 1527 1528 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1529 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1530 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1531 1532 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1533 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1534 1535 in6 = satosin6(&pcb.ki_src); 1536 in6->sin6_len = sizeof(*in6); 1537 in6->sin6_family = pf; 1538 in6->sin6_port = in6p->in6p_lport; 1539 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1540 in6->sin6_addr = in6p->in6p_laddr; 1541 in6->sin6_scope_id = 0; /* XXX? */ 1542 1543 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1544 in6 = satosin6(&pcb.ki_dst); 1545 in6->sin6_len = sizeof(*in6); 1546 in6->sin6_family = pf; 1547 in6->sin6_port = in6p->in6p_fport; 1548 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1549 in6->sin6_addr = in6p->in6p_faddr; 1550 in6->sin6_scope_id = 0; /* XXX? */ 1551 } 1552 break; 1553 #endif 1554 } 1555 1556 if (len >= elem_size && elem_count > 0) { 1557 error = copyout(&pcb, dp, out_size); 1558 if (error) { 1559 mutex_exit(softnet_lock); 1560 return (error); 1561 } 1562 dp += elem_size; 1563 len -= elem_size; 1564 } 1565 needed += elem_size; 1566 if (elem_count > 0 && elem_count != INT_MAX) 1567 elem_count--; 1568 } 1569 1570 *oldlenp = needed; 1571 if (oldp == NULL) 1572 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1573 1574 mutex_exit(softnet_lock); 1575 1576 return (error); 1577 } 1578 1579 static int 1580 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1581 { 1582 struct sysctlnode node; 1583 int error; 1584 char newname[TCPCC_MAXLEN]; 1585 1586 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1587 1588 node = *rnode; 1589 node.sysctl_data = newname; 1590 node.sysctl_size = sizeof(newname); 1591 1592 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1593 1594 if (error || 1595 newp == NULL || 1596 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1597 return error; 1598 1599 mutex_enter(softnet_lock); 1600 error = tcp_congctl_select(NULL, newname); 1601 mutex_exit(softnet_lock); 1602 1603 return error; 1604 } 1605 1606 static int 1607 sysctl_tcp_keep(SYSCTLFN_ARGS) 1608 { 1609 int error; 1610 u_int tmp; 1611 struct sysctlnode node; 1612 1613 node = *rnode; 1614 tmp = *(u_int *)rnode->sysctl_data; 1615 node.sysctl_data = &tmp; 1616 1617 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1618 if (error || newp == NULL) 1619 return error; 1620 1621 mutex_enter(softnet_lock); 1622 1623 *(u_int *)rnode->sysctl_data = tmp; 1624 tcp_tcpcb_template(); /* update the template */ 1625 1626 mutex_exit(softnet_lock); 1627 return 0; 1628 } 1629 1630 static int 1631 sysctl_net_inet_tcp_stats(SYSCTLFN_ARGS) 1632 { 1633 1634 return (NETSTAT_SYSCTL(tcpstat_percpu, TCP_NSTATS)); 1635 } 1636 1637 /* 1638 * this (second stage) setup routine is a replacement for tcp_sysctl() 1639 * (which is currently used for ipv4 and ipv6) 1640 */ 1641 static void 1642 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1643 const char *tcpname) 1644 { 1645 const struct sysctlnode *sack_node; 1646 const struct sysctlnode *abc_node; 1647 const struct sysctlnode *ecn_node; 1648 const struct sysctlnode *congctl_node; 1649 const struct sysctlnode *mslt_node; 1650 const struct sysctlnode *vtw_node; 1651 #ifdef TCP_DEBUG 1652 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1653 extern int tcp_debx; 1654 #endif 1655 1656 sysctl_createv(clog, 0, NULL, NULL, 1657 CTLFLAG_PERMANENT, 1658 CTLTYPE_NODE, "net", NULL, 1659 NULL, 0, NULL, 0, 1660 CTL_NET, CTL_EOL); 1661 sysctl_createv(clog, 0, NULL, NULL, 1662 CTLFLAG_PERMANENT, 1663 CTLTYPE_NODE, pfname, NULL, 1664 NULL, 0, NULL, 0, 1665 CTL_NET, pf, CTL_EOL); 1666 sysctl_createv(clog, 0, NULL, NULL, 1667 CTLFLAG_PERMANENT, 1668 CTLTYPE_NODE, tcpname, 1669 SYSCTL_DESCR("TCP related settings"), 1670 NULL, 0, NULL, 0, 1671 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1672 1673 sysctl_createv(clog, 0, NULL, NULL, 1674 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1675 CTLTYPE_INT, "rfc1323", 1676 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1677 NULL, 0, &tcp_do_rfc1323, 0, 1678 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1679 sysctl_createv(clog, 0, NULL, NULL, 1680 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1681 CTLTYPE_INT, "sendspace", 1682 SYSCTL_DESCR("Default TCP send buffer size"), 1683 NULL, 0, &tcp_sendspace, 0, 1684 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1685 sysctl_createv(clog, 0, NULL, NULL, 1686 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1687 CTLTYPE_INT, "recvspace", 1688 SYSCTL_DESCR("Default TCP receive buffer size"), 1689 NULL, 0, &tcp_recvspace, 0, 1690 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1691 sysctl_createv(clog, 0, NULL, NULL, 1692 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1693 CTLTYPE_INT, "mssdflt", 1694 SYSCTL_DESCR("Default maximum segment size"), 1695 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1696 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1697 sysctl_createv(clog, 0, NULL, NULL, 1698 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1699 CTLTYPE_INT, "minmss", 1700 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 1701 NULL, 0, &tcp_minmss, 0, 1702 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1703 sysctl_createv(clog, 0, NULL, NULL, 1704 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1705 CTLTYPE_INT, "msl", 1706 SYSCTL_DESCR("Maximum Segment Life"), 1707 NULL, 0, &tcp_msl, 0, 1708 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSL, CTL_EOL); 1709 sysctl_createv(clog, 0, NULL, NULL, 1710 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1711 CTLTYPE_INT, "syn_cache_limit", 1712 SYSCTL_DESCR("Maximum number of entries in the TCP " 1713 "compressed state engine"), 1714 NULL, 0, &tcp_syn_cache_limit, 0, 1715 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1716 CTL_EOL); 1717 sysctl_createv(clog, 0, NULL, NULL, 1718 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1719 CTLTYPE_INT, "syn_bucket_limit", 1720 SYSCTL_DESCR("Maximum number of entries per hash " 1721 "bucket in the TCP compressed state " 1722 "engine"), 1723 NULL, 0, &tcp_syn_bucket_limit, 0, 1724 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1725 CTL_EOL); 1726 #if 0 /* obsoleted */ 1727 sysctl_createv(clog, 0, NULL, NULL, 1728 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1729 CTLTYPE_INT, "syn_cache_interval", 1730 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1731 NULL, 0, &tcp_syn_cache_interval, 0, 1732 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1733 CTL_EOL); 1734 #endif 1735 sysctl_createv(clog, 0, NULL, NULL, 1736 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1737 CTLTYPE_INT, "init_win", 1738 SYSCTL_DESCR("Initial TCP congestion window"), 1739 NULL, 0, &tcp_init_win, 0, 1740 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1741 sysctl_createv(clog, 0, NULL, NULL, 1742 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1743 CTLTYPE_INT, "mss_ifmtu", 1744 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1745 NULL, 0, &tcp_mss_ifmtu, 0, 1746 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1747 sysctl_createv(clog, 0, NULL, &sack_node, 1748 CTLFLAG_PERMANENT, 1749 CTLTYPE_NODE, "sack", 1750 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1751 NULL, 0, NULL, 0, 1752 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1753 1754 /* Congctl subtree */ 1755 sysctl_createv(clog, 0, NULL, &congctl_node, 1756 CTLFLAG_PERMANENT, 1757 CTLTYPE_NODE, "congctl", 1758 SYSCTL_DESCR("TCP Congestion Control"), 1759 NULL, 0, NULL, 0, 1760 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1761 sysctl_createv(clog, 0, &congctl_node, NULL, 1762 CTLFLAG_PERMANENT, 1763 CTLTYPE_STRING, "available", 1764 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1765 NULL, 0, &tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1766 sysctl_createv(clog, 0, &congctl_node, NULL, 1767 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1768 CTLTYPE_STRING, "selected", 1769 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1770 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1771 CTL_CREATE, CTL_EOL); 1772 1773 sysctl_createv(clog, 0, NULL, NULL, 1774 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1775 CTLTYPE_INT, "win_scale", 1776 SYSCTL_DESCR("Use RFC1323 window scale options"), 1777 NULL, 0, &tcp_do_win_scale, 0, 1778 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 1779 sysctl_createv(clog, 0, NULL, NULL, 1780 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1781 CTLTYPE_INT, "timestamps", 1782 SYSCTL_DESCR("Use RFC1323 time stamp options"), 1783 NULL, 0, &tcp_do_timestamps, 0, 1784 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 1785 sysctl_createv(clog, 0, NULL, NULL, 1786 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1787 CTLTYPE_INT, "compat_42", 1788 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 1789 NULL, 0, &tcp_compat_42, 0, 1790 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 1791 sysctl_createv(clog, 0, NULL, NULL, 1792 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1793 CTLTYPE_INT, "cwm", 1794 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 1795 "Monitoring"), 1796 NULL, 0, &tcp_cwm, 0, 1797 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 1798 sysctl_createv(clog, 0, NULL, NULL, 1799 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1800 CTLTYPE_INT, "cwm_burstsize", 1801 SYSCTL_DESCR("Congestion Window Monitoring allowed " 1802 "burst count in packets"), 1803 NULL, 0, &tcp_cwm_burstsize, 0, 1804 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 1805 CTL_EOL); 1806 sysctl_createv(clog, 0, NULL, NULL, 1807 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1808 CTLTYPE_INT, "ack_on_push", 1809 SYSCTL_DESCR("Immediately return ACK when PSH is " 1810 "received"), 1811 NULL, 0, &tcp_ack_on_push, 0, 1812 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 1813 sysctl_createv(clog, 0, NULL, NULL, 1814 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1815 CTLTYPE_INT, "keepidle", 1816 SYSCTL_DESCR("Allowed connection idle ticks before a " 1817 "keepalive probe is sent"), 1818 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 1819 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 1820 sysctl_createv(clog, 0, NULL, NULL, 1821 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1822 CTLTYPE_INT, "keepintvl", 1823 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 1824 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 1825 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 1826 sysctl_createv(clog, 0, NULL, NULL, 1827 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1828 CTLTYPE_INT, "keepcnt", 1829 SYSCTL_DESCR("Number of keepalive probes to send"), 1830 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 1831 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 1832 sysctl_createv(clog, 0, NULL, NULL, 1833 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 1834 CTLTYPE_INT, "slowhz", 1835 SYSCTL_DESCR("Keepalive ticks per second"), 1836 NULL, PR_SLOWHZ, NULL, 0, 1837 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 1838 sysctl_createv(clog, 0, NULL, NULL, 1839 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1840 CTLTYPE_INT, "log_refused", 1841 SYSCTL_DESCR("Log refused TCP connections"), 1842 NULL, 0, &tcp_log_refused, 0, 1843 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 1844 #if 0 /* obsoleted */ 1845 sysctl_createv(clog, 0, NULL, NULL, 1846 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1847 CTLTYPE_INT, "rstratelimit", NULL, 1848 NULL, 0, &tcp_rst_ratelim, 0, 1849 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 1850 #endif 1851 sysctl_createv(clog, 0, NULL, NULL, 1852 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1853 CTLTYPE_INT, "rstppslimit", 1854 SYSCTL_DESCR("Maximum number of RST packets to send " 1855 "per second"), 1856 NULL, 0, &tcp_rst_ppslim, 0, 1857 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 1858 sysctl_createv(clog, 0, NULL, NULL, 1859 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1860 CTLTYPE_INT, "delack_ticks", 1861 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 1862 NULL, 0, &tcp_delack_ticks, 0, 1863 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 1864 sysctl_createv(clog, 0, NULL, NULL, 1865 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1866 CTLTYPE_INT, "init_win_local", 1867 SYSCTL_DESCR("Initial TCP window size (in segments)"), 1868 NULL, 0, &tcp_init_win_local, 0, 1869 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 1870 CTL_EOL); 1871 sysctl_createv(clog, 0, NULL, NULL, 1872 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1873 CTLTYPE_STRUCT, "ident", 1874 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 1875 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 1876 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 1877 sysctl_createv(clog, 0, NULL, NULL, 1878 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1879 CTLTYPE_INT, "do_loopback_cksum", 1880 SYSCTL_DESCR("Perform TCP checksum on loopback"), 1881 NULL, 0, &tcp_do_loopback_cksum, 0, 1882 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 1883 CTL_EOL); 1884 sysctl_createv(clog, 0, NULL, NULL, 1885 CTLFLAG_PERMANENT, 1886 CTLTYPE_STRUCT, "pcblist", 1887 SYSCTL_DESCR("TCP protocol control block list"), 1888 sysctl_inpcblist, 0, &tcbtable, 0, 1889 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1890 CTL_EOL); 1891 sysctl_createv(clog, 0, NULL, NULL, 1892 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1893 CTLTYPE_INT, "keepinit", 1894 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 1895 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 1896 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1897 1898 /* TCP socket buffers auto-sizing nodes */ 1899 sysctl_createv(clog, 0, NULL, NULL, 1900 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1901 CTLTYPE_INT, "recvbuf_auto", 1902 SYSCTL_DESCR("Enable automatic receive " 1903 "buffer sizing (experimental)"), 1904 NULL, 0, &tcp_do_autorcvbuf, 0, 1905 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1906 sysctl_createv(clog, 0, NULL, NULL, 1907 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1908 CTLTYPE_INT, "recvbuf_inc", 1909 SYSCTL_DESCR("Incrementor step size of " 1910 "automatic receive buffer"), 1911 NULL, 0, &tcp_autorcvbuf_inc, 0, 1912 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1913 sysctl_createv(clog, 0, NULL, NULL, 1914 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1915 CTLTYPE_INT, "recvbuf_max", 1916 SYSCTL_DESCR("Max size of automatic receive buffer"), 1917 NULL, 0, &tcp_autorcvbuf_max, 0, 1918 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1919 1920 sysctl_createv(clog, 0, NULL, NULL, 1921 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1922 CTLTYPE_INT, "sendbuf_auto", 1923 SYSCTL_DESCR("Enable automatic send " 1924 "buffer sizing (experimental)"), 1925 NULL, 0, &tcp_do_autosndbuf, 0, 1926 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1927 sysctl_createv(clog, 0, NULL, NULL, 1928 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1929 CTLTYPE_INT, "sendbuf_inc", 1930 SYSCTL_DESCR("Incrementor step size of " 1931 "automatic send buffer"), 1932 NULL, 0, &tcp_autosndbuf_inc, 0, 1933 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1934 sysctl_createv(clog, 0, NULL, NULL, 1935 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1936 CTLTYPE_INT, "sendbuf_max", 1937 SYSCTL_DESCR("Max size of automatic send buffer"), 1938 NULL, 0, &tcp_autosndbuf_max, 0, 1939 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1940 1941 /* ECN subtree */ 1942 sysctl_createv(clog, 0, NULL, &ecn_node, 1943 CTLFLAG_PERMANENT, 1944 CTLTYPE_NODE, "ecn", 1945 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 1946 NULL, 0, NULL, 0, 1947 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1948 sysctl_createv(clog, 0, &ecn_node, NULL, 1949 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1950 CTLTYPE_INT, "enable", 1951 SYSCTL_DESCR("Enable TCP Explicit Congestion " 1952 "Notification"), 1953 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 1954 sysctl_createv(clog, 0, &ecn_node, NULL, 1955 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1956 CTLTYPE_INT, "maxretries", 1957 SYSCTL_DESCR("Number of times to retry ECN setup " 1958 "before disabling ECN on the connection"), 1959 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 1960 1961 /* SACK gets it's own little subtree. */ 1962 sysctl_createv(clog, 0, NULL, &sack_node, 1963 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1964 CTLTYPE_INT, "enable", 1965 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 1966 NULL, 0, &tcp_do_sack, 0, 1967 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1968 sysctl_createv(clog, 0, NULL, &sack_node, 1969 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1970 CTLTYPE_INT, "maxholes", 1971 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 1972 NULL, 0, &tcp_sack_tp_maxholes, 0, 1973 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1974 sysctl_createv(clog, 0, NULL, &sack_node, 1975 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1976 CTLTYPE_INT, "globalmaxholes", 1977 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 1978 NULL, 0, &tcp_sack_globalmaxholes, 0, 1979 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1980 sysctl_createv(clog, 0, NULL, &sack_node, 1981 CTLFLAG_PERMANENT, 1982 CTLTYPE_INT, "globalholes", 1983 SYSCTL_DESCR("Global number of TCP SACK holes"), 1984 NULL, 0, &tcp_sack_globalholes, 0, 1985 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1986 1987 sysctl_createv(clog, 0, NULL, NULL, 1988 CTLFLAG_PERMANENT, 1989 CTLTYPE_STRUCT, "stats", 1990 SYSCTL_DESCR("TCP statistics"), 1991 sysctl_net_inet_tcp_stats, 0, NULL, 0, 1992 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 1993 CTL_EOL); 1994 sysctl_createv(clog, 0, NULL, NULL, 1995 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1996 CTLTYPE_INT, "local_by_rtt", 1997 SYSCTL_DESCR("Use RTT estimator to decide which hosts " 1998 "are local"), 1999 NULL, 0, &tcp_rttlocal, 0, 2000 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2001 #ifdef TCP_DEBUG 2002 sysctl_createv(clog, 0, NULL, NULL, 2003 CTLFLAG_PERMANENT, 2004 CTLTYPE_STRUCT, "debug", 2005 SYSCTL_DESCR("TCP sockets debug information"), 2006 NULL, 0, &tcp_debug, sizeof(tcp_debug), 2007 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 2008 CTL_EOL); 2009 sysctl_createv(clog, 0, NULL, NULL, 2010 CTLFLAG_PERMANENT, 2011 CTLTYPE_INT, "debx", 2012 SYSCTL_DESCR("Number of TCP debug sockets messages"), 2013 NULL, 0, &tcp_debx, sizeof(tcp_debx), 2014 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 2015 CTL_EOL); 2016 #endif 2017 sysctl_createv(clog, 0, NULL, NULL, 2018 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2019 CTLTYPE_STRUCT, "drop", 2020 SYSCTL_DESCR("TCP drop connection"), 2021 sysctl_net_inet_tcp_drop, 0, NULL, 0, 2022 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 2023 #if NRND > 0 2024 sysctl_createv(clog, 0, NULL, NULL, 2025 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2026 CTLTYPE_INT, "iss_hash", 2027 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 2028 "hash computation"), 2029 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 2030 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2031 CTL_EOL); 2032 #endif 2033 2034 /* ABC subtree */ 2035 2036 sysctl_createv(clog, 0, NULL, &abc_node, 2037 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2038 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2039 NULL, 0, NULL, 0, 2040 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2041 sysctl_createv(clog, 0, &abc_node, NULL, 2042 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2043 CTLTYPE_INT, "enable", 2044 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2045 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2046 sysctl_createv(clog, 0, &abc_node, NULL, 2047 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2048 CTLTYPE_INT, "aggressive", 2049 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2050 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2051 2052 /* MSL tuning subtree */ 2053 2054 sysctl_createv(clog, 0, NULL, &mslt_node, 2055 CTLFLAG_PERMANENT, CTLTYPE_NODE, "mslt", 2056 SYSCTL_DESCR("MSL Tuning for TIME_WAIT truncation"), 2057 NULL, 0, NULL, 0, 2058 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2059 sysctl_createv(clog, 0, &mslt_node, NULL, 2060 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2061 CTLTYPE_INT, "enable", 2062 SYSCTL_DESCR("Enable TIME_WAIT truncation"), 2063 NULL, 0, &tcp_msl_enable, 0, CTL_CREATE, CTL_EOL); 2064 sysctl_createv(clog, 0, &mslt_node, NULL, 2065 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2066 CTLTYPE_INT, "loopback", 2067 SYSCTL_DESCR("MSL value to use for loopback connections"), 2068 NULL, 0, &tcp_msl_loop, 0, CTL_CREATE, CTL_EOL); 2069 sysctl_createv(clog, 0, &mslt_node, NULL, 2070 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2071 CTLTYPE_INT, "local", 2072 SYSCTL_DESCR("MSL value to use for local connections"), 2073 NULL, 0, &tcp_msl_local, 0, CTL_CREATE, CTL_EOL); 2074 sysctl_createv(clog, 0, &mslt_node, NULL, 2075 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2076 CTLTYPE_INT, "remote", 2077 SYSCTL_DESCR("MSL value to use for remote connections"), 2078 NULL, 0, &tcp_msl_remote, 0, CTL_CREATE, CTL_EOL); 2079 sysctl_createv(clog, 0, &mslt_node, NULL, 2080 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2081 CTLTYPE_INT, "remote_threshold", 2082 SYSCTL_DESCR("RTT estimate value to promote local to remote"), 2083 NULL, 0, &tcp_msl_remote_threshold, 0, CTL_CREATE, CTL_EOL); 2084 2085 /* vestigial TIME_WAIT tuning subtree */ 2086 2087 sysctl_createv(clog, 0, NULL, &vtw_node, 2088 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vtw", 2089 SYSCTL_DESCR("Tuning for Vestigial TIME_WAIT"), 2090 NULL, 0, NULL, 0, 2091 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2092 sysctl_createv(clog, 0, &vtw_node, NULL, 2093 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2094 CTLTYPE_INT, "enable", 2095 SYSCTL_DESCR("Enable Vestigial TIME_WAIT"), 2096 sysctl_tcp_vtw_enable, 0, 2097 (pf == AF_INET) ? &tcp4_vtw_enable : &tcp6_vtw_enable, 2098 0, CTL_CREATE, CTL_EOL); 2099 sysctl_createv(clog, 0, &vtw_node, NULL, 2100 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 2101 CTLTYPE_INT, "entries", 2102 SYSCTL_DESCR("Maximum number of vestigial TIME_WAIT entries"), 2103 NULL, 0, &tcp_vtw_entries, 0, CTL_CREATE, CTL_EOL); 2104 } 2105 2106 void 2107 tcp_usrreq_init(void) 2108 { 2109 2110 #ifdef INET 2111 sysctl_net_inet_tcp_setup2(NULL, PF_INET, "inet", "tcp"); 2112 #endif 2113 #ifdef INET6 2114 sysctl_net_inet_tcp_setup2(NULL, PF_INET6, "inet6", "tcp6"); 2115 #endif 2116 } 2117
Indexes created Sun Sep 21 16:09:51 GMT 2025